diff options
Diffstat (limited to 'fs/yaffs2')
43 files changed, 0 insertions, 15348 deletions
diff --git a/fs/yaffs2/Kconfig b/fs/yaffs2/Kconfig deleted file mode 100644 index 6354140..0000000 --- a/fs/yaffs2/Kconfig +++ /dev/null @@ -1,161 +0,0 @@ -# -# YAFFS file system configurations -# - -config YAFFS_FS - tristate "YAFFS2 file system support" - default n - depends on MTD_BLOCK - select YAFFS_YAFFS1 - select YAFFS_YAFFS2 - help - YAFFS2, or Yet Another Flash Filing System, is a filing system - optimised for NAND Flash chips. - - To compile the YAFFS2 file system support as a module, choose M - here: the module will be called yaffs2. - - If unsure, say N. - - Further information on YAFFS2 is available at - <http://www.aleph1.co.uk/yaffs/>. - -config YAFFS_YAFFS1 - bool "512 byte / page devices" - depends on YAFFS_FS - default y - help - Enable YAFFS1 support -- yaffs for 512 byte / page devices - - Not needed for 2K-page devices. - - If unsure, say Y. - -config YAFFS_9BYTE_TAGS - bool "Use older-style on-NAND data format with pageStatus byte" - depends on YAFFS_YAFFS1 - default n - help - - Older-style on-NAND data format has a "pageStatus" byte to record - chunk/page state. This byte is zero when the page is discarded. - Choose this option if you have existing on-NAND data using this - format that you need to continue to support. New data written - also uses the older-style format. Note: Use of this option - generally requires that MTD's oob layout be adjusted to use the - older-style format. See notes on tags formats and MTD versions - in yaffs_mtdif1.c. - - If unsure, say N. - -config YAFFS_DOES_ECC - bool "Lets Yaffs do its own ECC" - depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS - default n - help - This enables Yaffs to use its own ECC functions instead of using - the ones from the generic MTD-NAND driver. - - If unsure, say N. - -config YAFFS_ECC_WRONG_ORDER - bool "Use the same ecc byte order as Steven Hill's nand_ecc.c" - depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS - default n - help - This makes yaffs_ecc.c use the same ecc byte order as Steven - Hill's nand_ecc.c. If not set, then you get the same ecc byte - order as SmartMedia. - - If unsure, say N. - -config YAFFS_YAFFS2 - bool "2048 byte (or larger) / page devices" - depends on YAFFS_FS - default y - help - Enable YAFFS2 support -- yaffs for >= 2K bytes per page devices - - If unsure, say Y. - -config YAFFS_AUTO_YAFFS2 - bool "Autoselect yaffs2 format" - depends on YAFFS_YAFFS2 - default y - help - Without this, you need to explicitely use yaffs2 as the file - system type. With this, you can say "yaffs" and yaffs or yaffs2 - will be used depending on the device page size (yaffs on - 512-byte page devices, yaffs2 on 2K page devices). - - If unsure, say Y. - -config YAFFS_DISABLE_TAGS_ECC - bool "Disable YAFFS from doing ECC on tags by default" - depends on YAFFS_FS && YAFFS_YAFFS2 - default n - help - This defaults Yaffs to using its own ECC calculations on tags instead of - just relying on the MTD. - This behavior can also be overridden with tags_ecc_on and - tags_ecc_off mount options. - - If unsure, say N. - -config YAFFS_ALWAYS_CHECK_CHUNK_ERASED - bool "Force chunk erase check" - depends on YAFFS_FS - default n - help - Normally YAFFS only checks chunks before writing until an erased - chunk is found. This helps to detect any partially written - chunks that might have happened due to power loss. - - Enabling this forces on the test that chunks are erased in flash - before writing to them. This takes more time but is potentially - a bit more secure. - - Suggest setting Y during development and ironing out driver - issues etc. Suggest setting to N if you want faster writing. - - If unsure, say Y. - -config YAFFS_EMPTY_LOST_AND_FOUND - bool "Empty lost and found on boot" - depends on YAFFS_FS - default n - help - If this is enabled then the contents of lost and found is - automatically dumped at mount. - - If unsure, say N. - -config YAFFS_DISABLE_BLOCK_REFRESHING - bool "Disable yaffs2 block refreshing" - depends on YAFFS_FS - default n - help - If this is set, then block refreshing is disabled. - Block refreshing infrequently refreshes the oldest block in - a yaffs2 file system. This mechanism helps to refresh flash to - mitigate against data loss. This is particularly useful for MLC. - - If unsure, say N. - -config YAFFS_DISABLE_BACKGROUND - bool "Disable yaffs2 background processing" - depends on YAFFS_FS - default n - help - If this is set, then background processing is disabled. - Background processing makes many foreground activities faster. - - If unsure, say N. - -config YAFFS_XATTR - bool "Enable yaffs2 xattr support" - depends on YAFFS_FS - default y - help - If this is set then yaffs2 will provide xattr support. - If unsure, say Y. diff --git a/fs/yaffs2/Makefile b/fs/yaffs2/Makefile deleted file mode 100644 index e63a28a..0000000 --- a/fs/yaffs2/Makefile +++ /dev/null @@ -1,17 +0,0 @@ -# -# Makefile for the linux YAFFS filesystem routines. -# - -obj-$(CONFIG_YAFFS_FS) += yaffs.o - -yaffs-y := yaffs_ecc.o yaffs_vfs.o yaffs_guts.o yaffs_checkptrw.o -yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o -yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o -yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o -yaffs-y += yaffs_nameval.o yaffs_attribs.o -yaffs-y += yaffs_allocator.o -yaffs-y += yaffs_yaffs1.o -yaffs-y += yaffs_yaffs2.o -yaffs-y += yaffs_bitmap.o -yaffs-y += yaffs_verify.o - diff --git a/fs/yaffs2/yaffs_allocator.c b/fs/yaffs2/yaffs_allocator.c deleted file mode 100644 index f9cd5be..0000000 --- a/fs/yaffs2/yaffs_allocator.c +++ /dev/null @@ -1,396 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_allocator.h" -#include "yaffs_guts.h" -#include "yaffs_trace.h" -#include "yportenv.h" - -#ifdef CONFIG_YAFFS_KMALLOC_ALLOCATOR - -void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev) -{ - dev = dev; -} - -void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev) -{ - dev = dev; -} - -struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev) -{ - return (struct yaffs_tnode *)kmalloc(dev->tnode_size, GFP_NOFS); -} - -void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) -{ - dev = dev; - kfree(tn); -} - -void yaffs_init_raw_objs(struct yaffs_dev *dev) -{ - dev = dev; -} - -void yaffs_deinit_raw_objs(struct yaffs_dev *dev) -{ - dev = dev; -} - -struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev) -{ - dev = dev; - return (struct yaffs_obj *)kmalloc(sizeof(struct yaffs_obj)); -} - -void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj) -{ - - dev = dev; - kfree(obj); -} - -#else - -struct yaffs_tnode_list { - struct yaffs_tnode_list *next; - struct yaffs_tnode *tnodes; -}; - -struct yaffs_obj_list { - struct yaffs_obj_list *next; - struct yaffs_obj *objects; -}; - -struct yaffs_allocator { - int n_tnodes_created; - struct yaffs_tnode *free_tnodes; - int n_free_tnodes; - struct yaffs_tnode_list *alloc_tnode_list; - - int n_obj_created; - struct yaffs_obj *free_objs; - int n_free_objects; - - struct yaffs_obj_list *allocated_obj_list; -}; - -static void yaffs_deinit_raw_tnodes(struct yaffs_dev *dev) -{ - - struct yaffs_allocator *allocator = - (struct yaffs_allocator *)dev->allocator; - - struct yaffs_tnode_list *tmp; - - if (!allocator) { - YBUG(); - return; - } - - while (allocator->alloc_tnode_list) { - tmp = allocator->alloc_tnode_list->next; - - kfree(allocator->alloc_tnode_list->tnodes); - kfree(allocator->alloc_tnode_list); - allocator->alloc_tnode_list = tmp; - - } - - allocator->free_tnodes = NULL; - allocator->n_free_tnodes = 0; - allocator->n_tnodes_created = 0; -} - -static void yaffs_init_raw_tnodes(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator = dev->allocator; - - if (allocator) { - allocator->alloc_tnode_list = NULL; - allocator->free_tnodes = NULL; - allocator->n_free_tnodes = 0; - allocator->n_tnodes_created = 0; - } else { - YBUG(); - } -} - -static int yaffs_create_tnodes(struct yaffs_dev *dev, int n_tnodes) -{ - struct yaffs_allocator *allocator = - (struct yaffs_allocator *)dev->allocator; - int i; - struct yaffs_tnode *new_tnodes; - u8 *mem; - struct yaffs_tnode *curr; - struct yaffs_tnode *next; - struct yaffs_tnode_list *tnl; - - if (!allocator) { - YBUG(); - return YAFFS_FAIL; - } - - if (n_tnodes < 1) - return YAFFS_OK; - - /* make these things */ - - new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS); - mem = (u8 *) new_tnodes; - - if (!new_tnodes) { - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs: Could not allocate Tnodes"); - return YAFFS_FAIL; - } - - /* New hookup for wide tnodes */ - for (i = 0; i < n_tnodes - 1; i++) { - curr = (struct yaffs_tnode *)&mem[i * dev->tnode_size]; - next = (struct yaffs_tnode *)&mem[(i + 1) * dev->tnode_size]; - curr->internal[0] = next; - } - - curr = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size]; - curr->internal[0] = allocator->free_tnodes; - allocator->free_tnodes = (struct yaffs_tnode *)mem; - - allocator->n_free_tnodes += n_tnodes; - allocator->n_tnodes_created += n_tnodes; - - /* Now add this bunch of tnodes to a list for freeing up. - * NB If we can't add this to the management list it isn't fatal - * but it just means we can't free this bunch of tnodes later. - */ - - tnl = kmalloc(sizeof(struct yaffs_tnode_list), GFP_NOFS); - if (!tnl) { - yaffs_trace(YAFFS_TRACE_ERROR, - "Could not add tnodes to management list"); - return YAFFS_FAIL; - } else { - tnl->tnodes = new_tnodes; - tnl->next = allocator->alloc_tnode_list; - allocator->alloc_tnode_list = tnl; - } - - yaffs_trace(YAFFS_TRACE_ALLOCATE,"Tnodes added"); - - return YAFFS_OK; -} - -struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator = - (struct yaffs_allocator *)dev->allocator; - struct yaffs_tnode *tn = NULL; - - if (!allocator) { - YBUG(); - return NULL; - } - - /* If there are none left make more */ - if (!allocator->free_tnodes) - yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES); - - if (allocator->free_tnodes) { - tn = allocator->free_tnodes; - allocator->free_tnodes = allocator->free_tnodes->internal[0]; - allocator->n_free_tnodes--; - } - - return tn; -} - -/* FreeTnode frees up a tnode and puts it back on the free list */ -void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) -{ - struct yaffs_allocator *allocator = dev->allocator; - - if (!allocator) { - YBUG(); - return; - } - - if (tn) { - tn->internal[0] = allocator->free_tnodes; - allocator->free_tnodes = tn; - allocator->n_free_tnodes++; - } - dev->checkpoint_blocks_required = 0; /* force recalculation */ -} - -static void yaffs_init_raw_objs(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator = dev->allocator; - - if (allocator) { - allocator->allocated_obj_list = NULL; - allocator->free_objs = NULL; - allocator->n_free_objects = 0; - } else { - YBUG(); - } -} - -static void yaffs_deinit_raw_objs(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator = dev->allocator; - struct yaffs_obj_list *tmp; - - if (!allocator) { - YBUG(); - return; - } - - while (allocator->allocated_obj_list) { - tmp = allocator->allocated_obj_list->next; - kfree(allocator->allocated_obj_list->objects); - kfree(allocator->allocated_obj_list); - - allocator->allocated_obj_list = tmp; - } - - allocator->free_objs = NULL; - allocator->n_free_objects = 0; - allocator->n_obj_created = 0; -} - -static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj) -{ - struct yaffs_allocator *allocator = dev->allocator; - - int i; - struct yaffs_obj *new_objs; - struct yaffs_obj_list *list; - - if (!allocator) { - YBUG(); - return YAFFS_FAIL; - } - - if (n_obj < 1) - return YAFFS_OK; - - /* make these things */ - new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS); - list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS); - - if (!new_objs || !list) { - if (new_objs) { - kfree(new_objs); - new_objs = NULL; - } - if (list) { - kfree(list); - list = NULL; - } - yaffs_trace(YAFFS_TRACE_ALLOCATE, - "Could not allocate more objects"); - return YAFFS_FAIL; - } - - /* Hook them into the free list */ - for (i = 0; i < n_obj - 1; i++) { - new_objs[i].siblings.next = - (struct list_head *)(&new_objs[i + 1]); - } - - new_objs[n_obj - 1].siblings.next = (void *)allocator->free_objs; - allocator->free_objs = new_objs; - allocator->n_free_objects += n_obj; - allocator->n_obj_created += n_obj; - - /* Now add this bunch of Objects to a list for freeing up. */ - - list->objects = new_objs; - list->next = allocator->allocated_obj_list; - allocator->allocated_obj_list = list; - - return YAFFS_OK; -} - -struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_allocator *allocator = dev->allocator; - - if (!allocator) { - YBUG(); - return obj; - } - - /* If there are none left make more */ - if (!allocator->free_objs) - yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS); - - if (allocator->free_objs) { - obj = allocator->free_objs; - allocator->free_objs = - (struct yaffs_obj *)(allocator->free_objs->siblings.next); - allocator->n_free_objects--; - } - - return obj; -} - -void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj) -{ - - struct yaffs_allocator *allocator = dev->allocator; - - if (!allocator) - YBUG(); - else { - /* Link into the free list. */ - obj->siblings.next = (struct list_head *)(allocator->free_objs); - allocator->free_objs = obj; - allocator->n_free_objects++; - } -} - -void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev) -{ - if (dev->allocator) { - yaffs_deinit_raw_tnodes(dev); - yaffs_deinit_raw_objs(dev); - - kfree(dev->allocator); - dev->allocator = NULL; - } else { - YBUG(); - } -} - -void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator; - - if (!dev->allocator) { - allocator = kmalloc(sizeof(struct yaffs_allocator), GFP_NOFS); - if (allocator) { - dev->allocator = allocator; - yaffs_init_raw_tnodes(dev); - yaffs_init_raw_objs(dev); - } - } else { - YBUG(); - } -} - -#endif diff --git a/fs/yaffs2/yaffs_allocator.h b/fs/yaffs2/yaffs_allocator.h deleted file mode 100644 index 4d5f2ae..0000000 --- a/fs/yaffs2/yaffs_allocator.h +++ /dev/null @@ -1,30 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_ALLOCATOR_H__ -#define __YAFFS_ALLOCATOR_H__ - -#include "yaffs_guts.h" - -void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev); -void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev); - -struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev); -void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn); - -struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev); -void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj); - -#endif diff --git a/fs/yaffs2/yaffs_attribs.c b/fs/yaffs2/yaffs_attribs.c deleted file mode 100644 index 9b47d37..0000000 --- a/fs/yaffs2/yaffs_attribs.c +++ /dev/null @@ -1,124 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_guts.h" -#include "yaffs_attribs.h" - -void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh) -{ - obj->yst_uid = oh->yst_uid; - obj->yst_gid = oh->yst_gid; - obj->yst_atime = oh->yst_atime; - obj->yst_mtime = oh->yst_mtime; - obj->yst_ctime = oh->yst_ctime; - obj->yst_rdev = oh->yst_rdev; -} - -void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj) -{ - oh->yst_uid = obj->yst_uid; - oh->yst_gid = obj->yst_gid; - oh->yst_atime = obj->yst_atime; - oh->yst_mtime = obj->yst_mtime; - oh->yst_ctime = obj->yst_ctime; - oh->yst_rdev = obj->yst_rdev; - -} - -void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c) -{ - obj->yst_mtime = Y_CURRENT_TIME; - if (do_a) - obj->yst_atime = obj->yst_mtime; - if (do_c) - obj->yst_ctime = obj->yst_mtime; -} - -void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev) -{ - yaffs_load_current_time(obj, 1, 1); - obj->yst_rdev = rdev; - obj->yst_uid = uid; - obj->yst_gid = gid; -} - -loff_t yaffs_get_file_size(struct yaffs_obj *obj) -{ - YCHAR *alias = NULL; - obj = yaffs_get_equivalent_obj(obj); - - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - return obj->variant.file_variant.file_size; - case YAFFS_OBJECT_TYPE_SYMLINK: - alias = obj->variant.symlink_variant.alias; - if (!alias) - return 0; - return strnlen(alias, YAFFS_MAX_ALIAS_LENGTH); - default: - return 0; - } -} - -int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr) -{ - unsigned int valid = attr->ia_valid; - - if (valid & ATTR_MODE) - obj->yst_mode = attr->ia_mode; - if (valid & ATTR_UID) - obj->yst_uid = attr->ia_uid; - if (valid & ATTR_GID) - obj->yst_gid = attr->ia_gid; - - if (valid & ATTR_ATIME) - obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); - if (valid & ATTR_CTIME) - obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); - if (valid & ATTR_MTIME) - obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); - - if (valid & ATTR_SIZE) - yaffs_resize_file(obj, attr->ia_size); - - yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); - - return YAFFS_OK; - -} - -int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr) -{ - unsigned int valid = 0; - - attr->ia_mode = obj->yst_mode; - valid |= ATTR_MODE; - attr->ia_uid = obj->yst_uid; - valid |= ATTR_UID; - attr->ia_gid = obj->yst_gid; - valid |= ATTR_GID; - - Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; - valid |= ATTR_ATIME; - Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; - valid |= ATTR_CTIME; - Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; - valid |= ATTR_MTIME; - - attr->ia_size = yaffs_get_file_size(obj); - valid |= ATTR_SIZE; - - attr->ia_valid = valid; - - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_attribs.h b/fs/yaffs2/yaffs_attribs.h deleted file mode 100644 index 33d541d..0000000 --- a/fs/yaffs2/yaffs_attribs.h +++ /dev/null @@ -1,28 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_ATTRIBS_H__ -#define __YAFFS_ATTRIBS_H__ - -#include "yaffs_guts.h" - -void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh); -void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj); -void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev); -void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c); -int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr); -int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr); - -#endif diff --git a/fs/yaffs2/yaffs_bitmap.c b/fs/yaffs2/yaffs_bitmap.c deleted file mode 100644 index 7df42cd..0000000 --- a/fs/yaffs2/yaffs_bitmap.c +++ /dev/null @@ -1,98 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_bitmap.h" -#include "yaffs_trace.h" -/* - * Chunk bitmap manipulations - */ - -static inline u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk) -{ - if (blk < dev->internal_start_block || blk > dev->internal_end_block) { - yaffs_trace(YAFFS_TRACE_ERROR, - "BlockBits block %d is not valid", - blk); - YBUG(); - } - return dev->chunk_bits + - (dev->chunk_bit_stride * (blk - dev->internal_start_block)); -} - -void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk) -{ - if (blk < dev->internal_start_block || blk > dev->internal_end_block || - chunk < 0 || chunk >= dev->param.chunks_per_block) { - yaffs_trace(YAFFS_TRACE_ERROR, - "Chunk Id (%d:%d) invalid", - blk, chunk); - YBUG(); - } -} - -void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - - memset(blk_bits, 0, dev->chunk_bit_stride); -} - -void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - - yaffs_verify_chunk_bit_id(dev, blk, chunk); - - blk_bits[chunk / 8] &= ~(1 << (chunk & 7)); -} - -void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - - yaffs_verify_chunk_bit_id(dev, blk, chunk); - - blk_bits[chunk / 8] |= (1 << (chunk & 7)); -} - -int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - yaffs_verify_chunk_bit_id(dev, blk, chunk); - - return (blk_bits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; -} - -int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - int i; - for (i = 0; i < dev->chunk_bit_stride; i++) { - if (*blk_bits) - return 1; - blk_bits++; - } - return 0; -} - -int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - int i; - int n = 0; - - for (i = 0; i < dev->chunk_bit_stride; i++, blk_bits++) - n += hweight8(*blk_bits); - - return n; -} diff --git a/fs/yaffs2/yaffs_bitmap.h b/fs/yaffs2/yaffs_bitmap.h deleted file mode 100644 index cf9ea58..0000000 --- a/fs/yaffs2/yaffs_bitmap.h +++ /dev/null @@ -1,33 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * Chunk bitmap manipulations - */ - -#ifndef __YAFFS_BITMAP_H__ -#define __YAFFS_BITMAP_H__ - -#include "yaffs_guts.h" - -void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk); -void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk); -void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); -void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); -int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); -int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk); -int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk); - -#endif diff --git a/fs/yaffs2/yaffs_checkptrw.c b/fs/yaffs2/yaffs_checkptrw.c deleted file mode 100644 index 4e40f43..0000000 --- a/fs/yaffs2/yaffs_checkptrw.c +++ /dev/null @@ -1,415 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_checkptrw.h" -#include "yaffs_getblockinfo.h" - -static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev) -{ - int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks; - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "checkpt blocks_avail = %d", blocks_avail); - - return (blocks_avail <= 0) ? 0 : 1; -} - -static int yaffs_checkpt_erase(struct yaffs_dev *dev) -{ - int i; - - if (!dev->param.erase_fn) - return 0; - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "checking blocks %d to %d", - dev->internal_start_block, dev->internal_end_block); - - for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { - struct yaffs_block_info *bi = yaffs_get_block_info(dev, i); - if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "erasing checkpt block %d", i); - - dev->n_erasures++; - - if (dev->param. - erase_fn(dev, - i - dev->block_offset /* realign */ )) { - bi->block_state = YAFFS_BLOCK_STATE_EMPTY; - dev->n_erased_blocks++; - dev->n_free_chunks += - dev->param.chunks_per_block; - } else { - dev->param.bad_block_fn(dev, i); - bi->block_state = YAFFS_BLOCK_STATE_DEAD; - } - } - } - - dev->blocks_in_checkpt = 0; - - return 1; -} - -static void yaffs2_checkpt_find_erased_block(struct yaffs_dev *dev) -{ - int i; - int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks; - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "allocating checkpt block: erased %d reserved %d avail %d next %d ", - dev->n_erased_blocks, dev->param.n_reserved_blocks, - blocks_avail, dev->checkpt_next_block); - - if (dev->checkpt_next_block >= 0 && - dev->checkpt_next_block <= dev->internal_end_block && - blocks_avail > 0) { - - for (i = dev->checkpt_next_block; i <= dev->internal_end_block; - i++) { - struct yaffs_block_info *bi = - yaffs_get_block_info(dev, i); - if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { - dev->checkpt_next_block = i + 1; - dev->checkpt_cur_block = i; - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "allocating checkpt block %d", i); - return; - } - } - } - yaffs_trace(YAFFS_TRACE_CHECKPOINT, "out of checkpt blocks"); - - dev->checkpt_next_block = -1; - dev->checkpt_cur_block = -1; -} - -static void yaffs2_checkpt_find_block(struct yaffs_dev *dev) -{ - int i; - struct yaffs_ext_tags tags; - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "find next checkpt block: start: blocks %d next %d", - dev->blocks_in_checkpt, dev->checkpt_next_block); - - if (dev->blocks_in_checkpt < dev->checkpt_max_blocks) - for (i = dev->checkpt_next_block; i <= dev->internal_end_block; - i++) { - int chunk = i * dev->param.chunks_per_block; - int realigned_chunk = chunk - dev->chunk_offset; - - dev->param.read_chunk_tags_fn(dev, realigned_chunk, - NULL, &tags); - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "find next checkpt block: search: block %d oid %d seq %d eccr %d", - i, tags.obj_id, tags.seq_number, - tags.ecc_result); - - if (tags.seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) { - /* Right kind of block */ - dev->checkpt_next_block = tags.obj_id; - dev->checkpt_cur_block = i; - dev->checkpt_block_list[dev-> - blocks_in_checkpt] = i; - dev->blocks_in_checkpt++; - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "found checkpt block %d", i); - return; - } - } - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks"); - - dev->checkpt_next_block = -1; - dev->checkpt_cur_block = -1; -} - -int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing) -{ - - dev->checkpt_open_write = writing; - - /* Got the functions we need? */ - if (!dev->param.write_chunk_tags_fn || - !dev->param.read_chunk_tags_fn || - !dev->param.erase_fn || !dev->param.bad_block_fn) - return 0; - - if (writing && !yaffs2_checkpt_space_ok(dev)) - return 0; - - if (!dev->checkpt_buffer) - dev->checkpt_buffer = - kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); - if (!dev->checkpt_buffer) - return 0; - - dev->checkpt_page_seq = 0; - dev->checkpt_byte_count = 0; - dev->checkpt_sum = 0; - dev->checkpt_xor = 0; - dev->checkpt_cur_block = -1; - dev->checkpt_cur_chunk = -1; - dev->checkpt_next_block = dev->internal_start_block; - - /* Erase all the blocks in the checkpoint area */ - if (writing) { - memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk); - dev->checkpt_byte_offs = 0; - return yaffs_checkpt_erase(dev); - } else { - int i; - /* Set to a value that will kick off a read */ - dev->checkpt_byte_offs = dev->data_bytes_per_chunk; - /* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully) - * going to be way more than we need */ - dev->blocks_in_checkpt = 0; - dev->checkpt_max_blocks = - (dev->internal_end_block - dev->internal_start_block) / 16 + - 2; - dev->checkpt_block_list = - kmalloc(sizeof(int) * dev->checkpt_max_blocks, GFP_NOFS); - if (!dev->checkpt_block_list) - return 0; - - for (i = 0; i < dev->checkpt_max_blocks; i++) - dev->checkpt_block_list[i] = -1; - } - - return 1; -} - -int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum) -{ - u32 composite_sum; - composite_sum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xFF); - *sum = composite_sum; - return 1; -} - -static int yaffs2_checkpt_flush_buffer(struct yaffs_dev *dev) -{ - int chunk; - int realigned_chunk; - - struct yaffs_ext_tags tags; - - if (dev->checkpt_cur_block < 0) { - yaffs2_checkpt_find_erased_block(dev); - dev->checkpt_cur_chunk = 0; - } - - if (dev->checkpt_cur_block < 0) - return 0; - - tags.is_deleted = 0; - tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */ - tags.chunk_id = dev->checkpt_page_seq + 1; - tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA; - tags.n_bytes = dev->data_bytes_per_chunk; - if (dev->checkpt_cur_chunk == 0) { - /* First chunk we write for the block? Set block state to - checkpoint */ - struct yaffs_block_info *bi = - yaffs_get_block_info(dev, dev->checkpt_cur_block); - bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; - dev->blocks_in_checkpt++; - } - - chunk = - dev->checkpt_cur_block * dev->param.chunks_per_block + - dev->checkpt_cur_chunk; - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "checkpoint wite buffer nand %d(%d:%d) objid %d chId %d", - chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk, - tags.obj_id, tags.chunk_id); - - realigned_chunk = chunk - dev->chunk_offset; - - dev->n_page_writes++; - - dev->param.write_chunk_tags_fn(dev, realigned_chunk, - dev->checkpt_buffer, &tags); - dev->checkpt_byte_offs = 0; - dev->checkpt_page_seq++; - dev->checkpt_cur_chunk++; - if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) { - dev->checkpt_cur_chunk = 0; - dev->checkpt_cur_block = -1; - } - memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk); - - return 1; -} - -int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes) -{ - int i = 0; - int ok = 1; - - u8 *data_bytes = (u8 *) data; - - if (!dev->checkpt_buffer) - return 0; - - if (!dev->checkpt_open_write) - return -1; - - while (i < n_bytes && ok) { - dev->checkpt_buffer[dev->checkpt_byte_offs] = *data_bytes; - dev->checkpt_sum += *data_bytes; - dev->checkpt_xor ^= *data_bytes; - - dev->checkpt_byte_offs++; - i++; - data_bytes++; - dev->checkpt_byte_count++; - - if (dev->checkpt_byte_offs < 0 || - dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) - ok = yaffs2_checkpt_flush_buffer(dev); - } - - return i; -} - -int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes) -{ - int i = 0; - int ok = 1; - struct yaffs_ext_tags tags; - - int chunk; - int realigned_chunk; - - u8 *data_bytes = (u8 *) data; - - if (!dev->checkpt_buffer) - return 0; - - if (dev->checkpt_open_write) - return -1; - - while (i < n_bytes && ok) { - - if (dev->checkpt_byte_offs < 0 || - dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) { - - if (dev->checkpt_cur_block < 0) { - yaffs2_checkpt_find_block(dev); - dev->checkpt_cur_chunk = 0; - } - - if (dev->checkpt_cur_block < 0) - ok = 0; - else { - chunk = dev->checkpt_cur_block * - dev->param.chunks_per_block + - dev->checkpt_cur_chunk; - - realigned_chunk = chunk - dev->chunk_offset; - - dev->n_page_reads++; - - /* read in the next chunk */ - dev->param.read_chunk_tags_fn(dev, - realigned_chunk, - dev-> - checkpt_buffer, - &tags); - - if (tags.chunk_id != (dev->checkpt_page_seq + 1) - || tags.ecc_result > YAFFS_ECC_RESULT_FIXED - || tags.seq_number != - YAFFS_SEQUENCE_CHECKPOINT_DATA) - ok = 0; - - dev->checkpt_byte_offs = 0; - dev->checkpt_page_seq++; - dev->checkpt_cur_chunk++; - - if (dev->checkpt_cur_chunk >= - dev->param.chunks_per_block) - dev->checkpt_cur_block = -1; - } - } - - if (ok) { - *data_bytes = - dev->checkpt_buffer[dev->checkpt_byte_offs]; - dev->checkpt_sum += *data_bytes; - dev->checkpt_xor ^= *data_bytes; - dev->checkpt_byte_offs++; - i++; - data_bytes++; - dev->checkpt_byte_count++; - } - } - - return i; -} - -int yaffs_checkpt_close(struct yaffs_dev *dev) -{ - - if (dev->checkpt_open_write) { - if (dev->checkpt_byte_offs != 0) - yaffs2_checkpt_flush_buffer(dev); - } else if (dev->checkpt_block_list) { - int i; - for (i = 0; - i < dev->blocks_in_checkpt - && dev->checkpt_block_list[i] >= 0; i++) { - int blk = dev->checkpt_block_list[i]; - struct yaffs_block_info *bi = NULL; - if (dev->internal_start_block <= blk - && blk <= dev->internal_end_block) - bi = yaffs_get_block_info(dev, blk); - if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY) - bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; - else { - /* Todo this looks odd... */ - } - } - kfree(dev->checkpt_block_list); - dev->checkpt_block_list = NULL; - } - - dev->n_free_chunks -= - dev->blocks_in_checkpt * dev->param.chunks_per_block; - dev->n_erased_blocks -= dev->blocks_in_checkpt; - - yaffs_trace(YAFFS_TRACE_CHECKPOINT,"checkpoint byte count %d", - dev->checkpt_byte_count); - - if (dev->checkpt_buffer) { - /* free the buffer */ - kfree(dev->checkpt_buffer); - dev->checkpt_buffer = NULL; - return 1; - } else { - return 0; - } -} - -int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev) -{ - /* Erase the checkpoint data */ - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "checkpoint invalidate of %d blocks", - dev->blocks_in_checkpt); - - return yaffs_checkpt_erase(dev); -} diff --git a/fs/yaffs2/yaffs_checkptrw.h b/fs/yaffs2/yaffs_checkptrw.h deleted file mode 100644 index 361c606..0000000 --- a/fs/yaffs2/yaffs_checkptrw.h +++ /dev/null @@ -1,33 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_CHECKPTRW_H__ -#define __YAFFS_CHECKPTRW_H__ - -#include "yaffs_guts.h" - -int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing); - -int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes); - -int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes); - -int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum); - -int yaffs_checkpt_close(struct yaffs_dev *dev); - -int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yaffs_ecc.c b/fs/yaffs2/yaffs_ecc.c deleted file mode 100644 index e95a806..0000000 --- a/fs/yaffs2/yaffs_ecc.c +++ /dev/null @@ -1,298 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * This code implements the ECC algorithm used in SmartMedia. - * - * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes. - * The two unused bit are set to 1. - * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC - * blocks are used on a 512-byte NAND page. - * - */ - -/* Table generated by gen-ecc.c - * Using a table means we do not have to calculate p1..p4 and p1'..p4' - * for each byte of data. These are instead provided in a table in bits7..2. - * Bit 0 of each entry indicates whether the entry has an odd or even parity, and therefore - * this bytes influence on the line parity. - */ - -#include "yportenv.h" - -#include "yaffs_ecc.h" - -static const unsigned char column_parity_table[] = { - 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69, - 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00, - 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc, - 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95, - 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0, - 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99, - 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65, - 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c, - 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc, - 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5, - 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59, - 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30, - 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55, - 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c, - 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0, - 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9, - 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0, - 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9, - 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55, - 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c, - 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59, - 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30, - 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc, - 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5, - 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65, - 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c, - 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0, - 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99, - 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc, - 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95, - 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69, - 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00, -}; - - -/* Calculate the ECC for a 256-byte block of data */ -void yaffs_ecc_cacl(const unsigned char *data, unsigned char *ecc) -{ - unsigned int i; - - unsigned char col_parity = 0; - unsigned char line_parity = 0; - unsigned char line_parity_prime = 0; - unsigned char t; - unsigned char b; - - for (i = 0; i < 256; i++) { - b = column_parity_table[*data++]; - col_parity ^= b; - - if (b & 0x01) { /* odd number of bits in the byte */ - line_parity ^= i; - line_parity_prime ^= ~i; - } - } - - ecc[2] = (~col_parity) | 0x03; - - t = 0; - if (line_parity & 0x80) - t |= 0x80; - if (line_parity_prime & 0x80) - t |= 0x40; - if (line_parity & 0x40) - t |= 0x20; - if (line_parity_prime & 0x40) - t |= 0x10; - if (line_parity & 0x20) - t |= 0x08; - if (line_parity_prime & 0x20) - t |= 0x04; - if (line_parity & 0x10) - t |= 0x02; - if (line_parity_prime & 0x10) - t |= 0x01; - ecc[1] = ~t; - - t = 0; - if (line_parity & 0x08) - t |= 0x80; - if (line_parity_prime & 0x08) - t |= 0x40; - if (line_parity & 0x04) - t |= 0x20; - if (line_parity_prime & 0x04) - t |= 0x10; - if (line_parity & 0x02) - t |= 0x08; - if (line_parity_prime & 0x02) - t |= 0x04; - if (line_parity & 0x01) - t |= 0x02; - if (line_parity_prime & 0x01) - t |= 0x01; - ecc[0] = ~t; - -#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER - /* Swap the bytes into the wrong order */ - t = ecc[0]; - ecc[0] = ecc[1]; - ecc[1] = t; -#endif -} - -/* Correct the ECC on a 256 byte block of data */ - -int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, - const unsigned char *test_ecc) -{ - unsigned char d0, d1, d2; /* deltas */ - - d0 = read_ecc[0] ^ test_ecc[0]; - d1 = read_ecc[1] ^ test_ecc[1]; - d2 = read_ecc[2] ^ test_ecc[2]; - - if ((d0 | d1 | d2) == 0) - return 0; /* no error */ - - if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 && - ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 && - ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) { - /* Single bit (recoverable) error in data */ - - unsigned byte; - unsigned bit; - -#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER - /* swap the bytes to correct for the wrong order */ - unsigned char t; - - t = d0; - d0 = d1; - d1 = t; -#endif - - bit = byte = 0; - - if (d1 & 0x80) - byte |= 0x80; - if (d1 & 0x20) - byte |= 0x40; - if (d1 & 0x08) - byte |= 0x20; - if (d1 & 0x02) - byte |= 0x10; - if (d0 & 0x80) - byte |= 0x08; - if (d0 & 0x20) - byte |= 0x04; - if (d0 & 0x08) - byte |= 0x02; - if (d0 & 0x02) - byte |= 0x01; - - if (d2 & 0x80) - bit |= 0x04; - if (d2 & 0x20) - bit |= 0x02; - if (d2 & 0x08) - bit |= 0x01; - - data[byte] ^= (1 << bit); - - return 1; /* Corrected the error */ - } - - if ((hweight8(d0) + hweight8(d1) + hweight8(d2)) == 1) { - /* Reccoverable error in ecc */ - - read_ecc[0] = test_ecc[0]; - read_ecc[1] = test_ecc[1]; - read_ecc[2] = test_ecc[2]; - - return 1; /* Corrected the error */ - } - - /* Unrecoverable error */ - - return -1; - -} - -/* - * ECCxxxOther does ECC calcs on arbitrary n bytes of data - */ -void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes, - struct yaffs_ecc_other *ecc_other) -{ - unsigned int i; - - unsigned char col_parity = 0; - unsigned line_parity = 0; - unsigned line_parity_prime = 0; - unsigned char b; - - for (i = 0; i < n_bytes; i++) { - b = column_parity_table[*data++]; - col_parity ^= b; - - if (b & 0x01) { - /* odd number of bits in the byte */ - line_parity ^= i; - line_parity_prime ^= ~i; - } - - } - - ecc_other->col_parity = (col_parity >> 2) & 0x3f; - ecc_other->line_parity = line_parity; - ecc_other->line_parity_prime = line_parity_prime; -} - -int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes, - struct yaffs_ecc_other *read_ecc, - const struct yaffs_ecc_other *test_ecc) -{ - unsigned char delta_col; /* column parity delta */ - unsigned delta_line; /* line parity delta */ - unsigned delta_line_prime; /* line parity delta */ - unsigned bit; - - delta_col = read_ecc->col_parity ^ test_ecc->col_parity; - delta_line = read_ecc->line_parity ^ test_ecc->line_parity; - delta_line_prime = - read_ecc->line_parity_prime ^ test_ecc->line_parity_prime; - - if ((delta_col | delta_line | delta_line_prime) == 0) - return 0; /* no error */ - - if (delta_line == ~delta_line_prime && - (((delta_col ^ (delta_col >> 1)) & 0x15) == 0x15)) { - /* Single bit (recoverable) error in data */ - - bit = 0; - - if (delta_col & 0x20) - bit |= 0x04; - if (delta_col & 0x08) - bit |= 0x02; - if (delta_col & 0x02) - bit |= 0x01; - - if (delta_line >= n_bytes) - return -1; - - data[delta_line] ^= (1 << bit); - - return 1; /* corrected */ - } - - if ((hweight32(delta_line) + - hweight32(delta_line_prime) + - hweight8(delta_col)) == 1) { - /* Reccoverable error in ecc */ - - *read_ecc = *test_ecc; - return 1; /* corrected */ - } - - /* Unrecoverable error */ - - return -1; -} diff --git a/fs/yaffs2/yaffs_ecc.h b/fs/yaffs2/yaffs_ecc.h deleted file mode 100644 index b0c461d..0000000 --- a/fs/yaffs2/yaffs_ecc.h +++ /dev/null @@ -1,44 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * This code implements the ECC algorithm used in SmartMedia. - * - * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes. - * The two unused bit are set to 1. - * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC - * blocks are used on a 512-byte NAND page. - * - */ - -#ifndef __YAFFS_ECC_H__ -#define __YAFFS_ECC_H__ - -struct yaffs_ecc_other { - unsigned char col_parity; - unsigned line_parity; - unsigned line_parity_prime; -}; - -void yaffs_ecc_cacl(const unsigned char *data, unsigned char *ecc); -int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, - const unsigned char *test_ecc); - -void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes, - struct yaffs_ecc_other *ecc); -int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes, - struct yaffs_ecc_other *read_ecc, - const struct yaffs_ecc_other *test_ecc); -#endif diff --git a/fs/yaffs2/yaffs_getblockinfo.h b/fs/yaffs2/yaffs_getblockinfo.h deleted file mode 100644 index d87acbd..0000000 --- a/fs/yaffs2/yaffs_getblockinfo.h +++ /dev/null @@ -1,35 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_GETBLOCKINFO_H__ -#define __YAFFS_GETBLOCKINFO_H__ - -#include "yaffs_guts.h" -#include "yaffs_trace.h" - -/* Function to manipulate block info */ -static inline struct yaffs_block_info *yaffs_get_block_info(struct yaffs_dev - *dev, int blk) -{ - if (blk < dev->internal_start_block || blk > dev->internal_end_block) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>> yaffs: get_block_info block %d is not valid", - blk); - YBUG(); - } - return &dev->block_info[blk - dev->internal_start_block]; -} - -#endif diff --git a/fs/yaffs2/yaffs_guts.c b/fs/yaffs2/yaffs_guts.c deleted file mode 100644 index f4ae9de..0000000 --- a/fs/yaffs2/yaffs_guts.c +++ /dev/null @@ -1,5164 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yportenv.h" -#include "yaffs_trace.h" - -#include "yaffs_guts.h" -#include "yaffs_tagsvalidity.h" -#include "yaffs_getblockinfo.h" - -#include "yaffs_tagscompat.h" - -#include "yaffs_nand.h" - -#include "yaffs_yaffs1.h" -#include "yaffs_yaffs2.h" -#include "yaffs_bitmap.h" -#include "yaffs_verify.h" - -#include "yaffs_nand.h" -#include "yaffs_packedtags2.h" - -#include "yaffs_nameval.h" -#include "yaffs_allocator.h" - -#include "yaffs_attribs.h" - -/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */ -#define YAFFS_GC_GOOD_ENOUGH 2 -#define YAFFS_GC_PASSIVE_THRESHOLD 4 - -#include "yaffs_ecc.h" - -/* Forward declarations */ - -static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, - const u8 * buffer, int n_bytes, int use_reserve); - - - -/* Function to calculate chunk and offset */ - -static void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr, - int *chunk_out, u32 * offset_out) -{ - int chunk; - u32 offset; - - chunk = (u32) (addr >> dev->chunk_shift); - - if (dev->chunk_div == 1) { - /* easy power of 2 case */ - offset = (u32) (addr & dev->chunk_mask); - } else { - /* Non power-of-2 case */ - - loff_t chunk_base; - - chunk /= dev->chunk_div; - - chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk; - offset = (u32) (addr - chunk_base); - } - - *chunk_out = chunk; - *offset_out = offset; -} - -/* Function to return the number of shifts for a power of 2 greater than or - * equal to the given number - * Note we don't try to cater for all possible numbers and this does not have to - * be hellishly efficient. - */ - -static u32 calc_shifts_ceiling(u32 x) -{ - int extra_bits; - int shifts; - - shifts = extra_bits = 0; - - while (x > 1) { - if (x & 1) - extra_bits++; - x >>= 1; - shifts++; - } - - if (extra_bits) - shifts++; - - return shifts; -} - -/* Function to return the number of shifts to get a 1 in bit 0 - */ - -static u32 calc_shifts(u32 x) -{ - u32 shifts; - - shifts = 0; - - if (!x) - return 0; - - while (!(x & 1)) { - x >>= 1; - shifts++; - } - - return shifts; -} - -/* - * Temporary buffer manipulations. - */ - -static int yaffs_init_tmp_buffers(struct yaffs_dev *dev) -{ - int i; - u8 *buf = (u8 *) 1; - - memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer)); - - for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { - dev->temp_buffer[i].line = 0; /* not in use */ - dev->temp_buffer[i].buffer = buf = - kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); - } - - return buf ? YAFFS_OK : YAFFS_FAIL; -} - -u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev, int line_no) -{ - int i, j; - - dev->temp_in_use++; - if (dev->temp_in_use > dev->max_temp) - dev->max_temp = dev->temp_in_use; - - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->temp_buffer[i].line == 0) { - dev->temp_buffer[i].line = line_no; - if ((i + 1) > dev->max_temp) { - dev->max_temp = i + 1; - for (j = 0; j <= i; j++) - dev->temp_buffer[j].max_line = - dev->temp_buffer[j].line; - } - - return dev->temp_buffer[i].buffer; - } - } - - yaffs_trace(YAFFS_TRACE_BUFFERS, - "Out of temp buffers at line %d, other held by lines:", - line_no); - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) - yaffs_trace(YAFFS_TRACE_BUFFERS," %d", dev->temp_buffer[i].line); - - /* - * If we got here then we have to allocate an unmanaged one - * This is not good. - */ - - dev->unmanaged_buffer_allocs++; - return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS); - -} - -void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 * buffer, int line_no) -{ - int i; - - dev->temp_in_use--; - - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->temp_buffer[i].buffer == buffer) { - dev->temp_buffer[i].line = 0; - return; - } - } - - if (buffer) { - /* assume it is an unmanaged one. */ - yaffs_trace(YAFFS_TRACE_BUFFERS, - "Releasing unmanaged temp buffer in line %d", - line_no); - kfree(buffer); - dev->unmanaged_buffer_deallocs++; - } - -} - -/* - * Determine if we have a managed buffer. - */ -int yaffs_is_managed_tmp_buffer(struct yaffs_dev *dev, const u8 * buffer) -{ - int i; - - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->temp_buffer[i].buffer == buffer) - return 1; - } - - for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].data == buffer) - return 1; - } - - if (buffer == dev->checkpt_buffer) - return 1; - - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs: unmaged buffer detected."); - return 0; -} - -/* - * Functions for robustisizing TODO - * - */ - -static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk, - const u8 * data, - const struct yaffs_ext_tags *tags) -{ - dev = dev; - nand_chunk = nand_chunk; - data = data; - tags = tags; -} - -static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk, - const struct yaffs_ext_tags *tags) -{ - dev = dev; - nand_chunk = nand_chunk; - tags = tags; -} - -void yaffs_handle_chunk_error(struct yaffs_dev *dev, - struct yaffs_block_info *bi) -{ - if (!bi->gc_prioritise) { - bi->gc_prioritise = 1; - dev->has_pending_prioritised_gc = 1; - bi->chunk_error_strikes++; - - if (bi->chunk_error_strikes > 3) { - bi->needs_retiring = 1; /* Too many stikes, so retire this */ - yaffs_trace(YAFFS_TRACE_ALWAYS, "yaffs: Block struck out"); - - } - } -} - -static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk, - int erased_ok) -{ - int flash_block = nand_chunk / dev->param.chunks_per_block; - struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - - yaffs_handle_chunk_error(dev, bi); - - if (erased_ok) { - /* Was an actual write failure, so mark the block for retirement */ - bi->needs_retiring = 1; - yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - "**>> Block %d needs retiring", flash_block); - } - - /* Delete the chunk */ - yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); - yaffs_skip_rest_of_block(dev); -} - -/* - * Verification code - */ - -/* - * Simple hash function. Needs to have a reasonable spread - */ - -static inline int yaffs_hash_fn(int n) -{ - n = abs(n); - return n % YAFFS_NOBJECT_BUCKETS; -} - -/* - * Access functions to useful fake objects. - * Note that root might have a presence in NAND if permissions are set. - */ - -struct yaffs_obj *yaffs_root(struct yaffs_dev *dev) -{ - return dev->root_dir; -} - -struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev) -{ - return dev->lost_n_found; -} - -/* - * Erased NAND checking functions - */ - -int yaffs_check_ff(u8 * buffer, int n_bytes) -{ - /* Horrible, slow implementation */ - while (n_bytes--) { - if (*buffer != 0xFF) - return 0; - buffer++; - } - return 1; -} - -static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk) -{ - int retval = YAFFS_OK; - u8 *data = yaffs_get_temp_buffer(dev, __LINE__); - struct yaffs_ext_tags tags; - int result; - - result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags); - - if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR) - retval = YAFFS_FAIL; - - if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || - tags.chunk_used) { - yaffs_trace(YAFFS_TRACE_NANDACCESS, "Chunk %d not erased", nand_chunk); - retval = YAFFS_FAIL; - } - - yaffs_release_temp_buffer(dev, data, __LINE__); - - return retval; - -} - -static int yaffs_verify_chunk_written(struct yaffs_dev *dev, - int nand_chunk, - const u8 * data, - struct yaffs_ext_tags *tags) -{ - int retval = YAFFS_OK; - struct yaffs_ext_tags temp_tags; - u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); - int result; - - result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags); - if (memcmp(buffer, data, dev->data_bytes_per_chunk) || - temp_tags.obj_id != tags->obj_id || - temp_tags.chunk_id != tags->chunk_id || - temp_tags.n_bytes != tags->n_bytes) - retval = YAFFS_FAIL; - - yaffs_release_temp_buffer(dev, buffer, __LINE__); - - return retval; -} - - -int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks) -{ - int reserved_chunks; - int reserved_blocks = dev->param.n_reserved_blocks; - int checkpt_blocks; - - checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev); - - reserved_chunks = - ((reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block); - - return (dev->n_free_chunks > (reserved_chunks + n_chunks)); -} - -static int yaffs_find_alloc_block(struct yaffs_dev *dev) -{ - int i; - - struct yaffs_block_info *bi; - - if (dev->n_erased_blocks < 1) { - /* Hoosterman we've got a problem. - * Can't get space to gc - */ - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: no more erased blocks" ); - - return -1; - } - - /* Find an empty block. */ - - for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { - dev->alloc_block_finder++; - if (dev->alloc_block_finder < dev->internal_start_block - || dev->alloc_block_finder > dev->internal_end_block) { - dev->alloc_block_finder = dev->internal_start_block; - } - - bi = yaffs_get_block_info(dev, dev->alloc_block_finder); - - if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { - bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->seq_number++; - bi->seq_number = dev->seq_number; - dev->n_erased_blocks--; - yaffs_trace(YAFFS_TRACE_ALLOCATE, - "Allocated block %d, seq %d, %d left" , - dev->alloc_block_finder, dev->seq_number, - dev->n_erased_blocks); - return dev->alloc_block_finder; - } - } - - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs tragedy: no more erased blocks, but there should have been %d", - dev->n_erased_blocks); - - return -1; -} - -static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver, - struct yaffs_block_info **block_ptr) -{ - int ret_val; - struct yaffs_block_info *bi; - - if (dev->alloc_block < 0) { - /* Get next block to allocate off */ - dev->alloc_block = yaffs_find_alloc_block(dev); - dev->alloc_page = 0; - } - - if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) { - /* Not enough space to allocate unless we're allowed to use the reserve. */ - return -1; - } - - if (dev->n_erased_blocks < dev->param.n_reserved_blocks - && dev->alloc_page == 0) - yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve"); - - /* Next page please.... */ - if (dev->alloc_block >= 0) { - bi = yaffs_get_block_info(dev, dev->alloc_block); - - ret_val = (dev->alloc_block * dev->param.chunks_per_block) + - dev->alloc_page; - bi->pages_in_use++; - yaffs_set_chunk_bit(dev, dev->alloc_block, dev->alloc_page); - - dev->alloc_page++; - - dev->n_free_chunks--; - - /* If the block is full set the state to full */ - if (dev->alloc_page >= dev->param.chunks_per_block) { - bi->block_state = YAFFS_BLOCK_STATE_FULL; - dev->alloc_block = -1; - } - - if (block_ptr) - *block_ptr = bi; - - return ret_val; - } - - yaffs_trace(YAFFS_TRACE_ERROR, "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" ); - - return -1; -} - -static int yaffs_get_erased_chunks(struct yaffs_dev *dev) -{ - int n; - - n = dev->n_erased_blocks * dev->param.chunks_per_block; - - if (dev->alloc_block > 0) - n += (dev->param.chunks_per_block - dev->alloc_page); - - return n; - -} - -/* - * yaffs_skip_rest_of_block() skips over the rest of the allocation block - * if we don't want to write to it. - */ -void yaffs_skip_rest_of_block(struct yaffs_dev *dev) -{ - if (dev->alloc_block > 0) { - struct yaffs_block_info *bi = - yaffs_get_block_info(dev, dev->alloc_block); - if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) { - bi->block_state = YAFFS_BLOCK_STATE_FULL; - dev->alloc_block = -1; - } - } -} - -static int yaffs_write_new_chunk(struct yaffs_dev *dev, - const u8 * data, - struct yaffs_ext_tags *tags, int use_reserver) -{ - int attempts = 0; - int write_ok = 0; - int chunk; - - yaffs2_checkpt_invalidate(dev); - - do { - struct yaffs_block_info *bi = 0; - int erased_ok = 0; - - chunk = yaffs_alloc_chunk(dev, use_reserver, &bi); - if (chunk < 0) { - /* no space */ - break; - } - - /* First check this chunk is erased, if it needs - * checking. The checking policy (unless forced - * always on) is as follows: - * - * Check the first page we try to write in a block. - * If the check passes then we don't need to check any - * more. If the check fails, we check again... - * If the block has been erased, we don't need to check. - * - * However, if the block has been prioritised for gc, - * then we think there might be something odd about - * this block and stop using it. - * - * Rationale: We should only ever see chunks that have - * not been erased if there was a partially written - * chunk due to power loss. This checking policy should - * catch that case with very few checks and thus save a - * lot of checks that are most likely not needed. - * - * Mods to the above - * If an erase check fails or the write fails we skip the - * rest of the block. - */ - - /* let's give it a try */ - attempts++; - - if (dev->param.always_check_erased) - bi->skip_erased_check = 0; - - if (!bi->skip_erased_check) { - erased_ok = yaffs_check_chunk_erased(dev, chunk); - if (erased_ok != YAFFS_OK) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>> yaffs chunk %d was not erased", - chunk); - - /* If not erased, delete this one, - * skip rest of block and - * try another chunk */ - yaffs_chunk_del(dev, chunk, 1, __LINE__); - yaffs_skip_rest_of_block(dev); - continue; - } - } - - write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags); - - if (!bi->skip_erased_check) - write_ok = - yaffs_verify_chunk_written(dev, chunk, data, tags); - - if (write_ok != YAFFS_OK) { - /* Clean up aborted write, skip to next block and - * try another chunk */ - yaffs_handle_chunk_wr_error(dev, chunk, erased_ok); - continue; - } - - bi->skip_erased_check = 1; - - /* Copy the data into the robustification buffer */ - yaffs_handle_chunk_wr_ok(dev, chunk, data, tags); - - } while (write_ok != YAFFS_OK && - (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); - - if (!write_ok) - chunk = -1; - - if (attempts > 1) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>> yaffs write required %d attempts", - attempts); - dev->n_retired_writes += (attempts - 1); - } - - return chunk; -} - -/* - * Block retiring for handling a broken block. - */ - -static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block) -{ - struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - - yaffs2_checkpt_invalidate(dev); - - yaffs2_clear_oldest_dirty_seq(dev, bi); - - if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) { - if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs: Failed to mark bad and erase block %d", - flash_block); - } else { - struct yaffs_ext_tags tags; - int chunk_id = - flash_block * dev->param.chunks_per_block; - - u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); - - memset(buffer, 0xff, dev->data_bytes_per_chunk); - yaffs_init_tags(&tags); - tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK; - if (dev->param.write_chunk_tags_fn(dev, chunk_id - - dev->chunk_offset, - buffer, - &tags) != YAFFS_OK) - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs: Failed to write bad block marker to block %d", - flash_block); - - yaffs_release_temp_buffer(dev, buffer, __LINE__); - } - } - - bi->block_state = YAFFS_BLOCK_STATE_DEAD; - bi->gc_prioritise = 0; - bi->needs_retiring = 0; - - dev->n_retired_blocks++; -} - -/*---------------- Name handling functions ------------*/ - -static u16 yaffs_calc_name_sum(const YCHAR * name) -{ - u16 sum = 0; - u16 i = 1; - - const YUCHAR *bname = (const YUCHAR *)name; - if (bname) { - while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH / 2))) { - - /* 0x1f mask is case insensitive */ - sum += ((*bname) & 0x1f) * i; - i++; - bname++; - } - } - return sum; -} - -void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name) -{ -#ifndef CONFIG_YAFFS_NO_SHORT_NAMES - memset(obj->short_name, 0, sizeof(obj->short_name)); - if (name && - strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <= - YAFFS_SHORT_NAME_LENGTH) - strcpy(obj->short_name, name); - else - obj->short_name[0] = _Y('\0'); -#endif - obj->sum = yaffs_calc_name_sum(name); -} - -void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, - const struct yaffs_obj_hdr *oh) -{ -#ifdef CONFIG_YAFFS_AUTO_UNICODE - YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1]; - memset(tmp_name, 0, sizeof(tmp_name)); - yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name, - YAFFS_MAX_NAME_LENGTH + 1); - yaffs_set_obj_name(obj, tmp_name); -#else - yaffs_set_obj_name(obj, oh->name); -#endif -} - -/*-------------------- TNODES ------------------- - - * List of spare tnodes - * The list is hooked together using the first pointer - * in the tnode. - */ - -struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev) -{ - struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev); - if (tn) { - memset(tn, 0, dev->tnode_size); - dev->n_tnodes++; - } - - dev->checkpoint_blocks_required = 0; /* force recalculation */ - - return tn; -} - -/* FreeTnode frees up a tnode and puts it back on the free list */ -static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) -{ - yaffs_free_raw_tnode(dev, tn); - dev->n_tnodes--; - dev->checkpoint_blocks_required = 0; /* force recalculation */ -} - -static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev) -{ - yaffs_deinit_raw_tnodes_and_objs(dev); - dev->n_obj = 0; - dev->n_tnodes = 0; -} - -void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn, - unsigned pos, unsigned val) -{ - u32 *map = (u32 *) tn; - u32 bit_in_map; - u32 bit_in_word; - u32 word_in_map; - u32 mask; - - pos &= YAFFS_TNODES_LEVEL0_MASK; - val >>= dev->chunk_grp_bits; - - bit_in_map = pos * dev->tnode_width; - word_in_map = bit_in_map / 32; - bit_in_word = bit_in_map & (32 - 1); - - mask = dev->tnode_mask << bit_in_word; - - map[word_in_map] &= ~mask; - map[word_in_map] |= (mask & (val << bit_in_word)); - - if (dev->tnode_width > (32 - bit_in_word)) { - bit_in_word = (32 - bit_in_word); - word_in_map++;; - mask = - dev->tnode_mask >> ( /*dev->tnode_width - */ bit_in_word); - map[word_in_map] &= ~mask; - map[word_in_map] |= (mask & (val >> bit_in_word)); - } -} - -u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, - unsigned pos) -{ - u32 *map = (u32 *) tn; - u32 bit_in_map; - u32 bit_in_word; - u32 word_in_map; - u32 val; - - pos &= YAFFS_TNODES_LEVEL0_MASK; - - bit_in_map = pos * dev->tnode_width; - word_in_map = bit_in_map / 32; - bit_in_word = bit_in_map & (32 - 1); - - val = map[word_in_map] >> bit_in_word; - - if (dev->tnode_width > (32 - bit_in_word)) { - bit_in_word = (32 - bit_in_word); - word_in_map++;; - val |= (map[word_in_map] << bit_in_word); - } - - val &= dev->tnode_mask; - val <<= dev->chunk_grp_bits; - - return val; -} - -/* ------------------- End of individual tnode manipulation -----------------*/ - -/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ - * The look up tree is represented by the top tnode and the number of top_level - * in the tree. 0 means only the level 0 tnode is in the tree. - */ - -/* FindLevel0Tnode finds the level 0 tnode, if one exists. */ -struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, - struct yaffs_file_var *file_struct, - u32 chunk_id) -{ - struct yaffs_tnode *tn = file_struct->top; - u32 i; - int required_depth; - int level = file_struct->top_level; - - dev = dev; - - /* Check sane level and chunk Id */ - if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) - return NULL; - - if (chunk_id > YAFFS_MAX_CHUNK_ID) - return NULL; - - /* First check we're tall enough (ie enough top_level) */ - - i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; - required_depth = 0; - while (i) { - i >>= YAFFS_TNODES_INTERNAL_BITS; - required_depth++; - } - - if (required_depth > file_struct->top_level) - return NULL; /* Not tall enough, so we can't find it */ - - /* Traverse down to level 0 */ - while (level > 0 && tn) { - tn = tn->internal[(chunk_id >> - (YAFFS_TNODES_LEVEL0_BITS + - (level - 1) * - YAFFS_TNODES_INTERNAL_BITS)) & - YAFFS_TNODES_INTERNAL_MASK]; - level--; - } - - return tn; -} - -/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree. - * This happens in two steps: - * 1. If the tree isn't tall enough, then make it taller. - * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. - * - * Used when modifying the tree. - * - * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will - * be plugged into the ttree. - */ - -struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, - struct yaffs_file_var *file_struct, - u32 chunk_id, - struct yaffs_tnode *passed_tn) -{ - int required_depth; - int i; - int l; - struct yaffs_tnode *tn; - - u32 x; - - /* Check sane level and page Id */ - if (file_struct->top_level < 0 - || file_struct->top_level > YAFFS_TNODES_MAX_LEVEL) - return NULL; - - if (chunk_id > YAFFS_MAX_CHUNK_ID) - return NULL; - - /* First check we're tall enough (ie enough top_level) */ - - x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; - required_depth = 0; - while (x) { - x >>= YAFFS_TNODES_INTERNAL_BITS; - required_depth++; - } - - if (required_depth > file_struct->top_level) { - /* Not tall enough, gotta make the tree taller */ - for (i = file_struct->top_level; i < required_depth; i++) { - - tn = yaffs_get_tnode(dev); - - if (tn) { - tn->internal[0] = file_struct->top; - file_struct->top = tn; - file_struct->top_level++; - } else { - yaffs_trace(YAFFS_TRACE_ERROR, "yaffs: no more tnodes"); - return NULL; - } - } - } - - /* Traverse down to level 0, adding anything we need */ - - l = file_struct->top_level; - tn = file_struct->top; - - if (l > 0) { - while (l > 0 && tn) { - x = (chunk_id >> - (YAFFS_TNODES_LEVEL0_BITS + - (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & - YAFFS_TNODES_INTERNAL_MASK; - - if ((l > 1) && !tn->internal[x]) { - /* Add missing non-level-zero tnode */ - tn->internal[x] = yaffs_get_tnode(dev); - if (!tn->internal[x]) - return NULL; - } else if (l == 1) { - /* Looking from level 1 at level 0 */ - if (passed_tn) { - /* If we already have one, then release it. */ - if (tn->internal[x]) - yaffs_free_tnode(dev, - tn-> - internal[x]); - tn->internal[x] = passed_tn; - - } else if (!tn->internal[x]) { - /* Don't have one, none passed in */ - tn->internal[x] = yaffs_get_tnode(dev); - if (!tn->internal[x]) - return NULL; - } - } - - tn = tn->internal[x]; - l--; - } - } else { - /* top is level 0 */ - if (passed_tn) { - memcpy(tn, passed_tn, - (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8); - yaffs_free_tnode(dev, passed_tn); - } - } - - return tn; -} - -static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id, - int chunk_obj) -{ - return (tags->chunk_id == chunk_obj && - tags->obj_id == obj_id && !tags->is_deleted) ? 1 : 0; - -} - -static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk, - struct yaffs_ext_tags *tags, int obj_id, - int inode_chunk) -{ - int j; - - for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) { - if (yaffs_check_chunk_bit - (dev, the_chunk / dev->param.chunks_per_block, - the_chunk % dev->param.chunks_per_block)) { - - if (dev->chunk_grp_size == 1) - return the_chunk; - else { - yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, - tags); - if (yaffs_tags_match(tags, obj_id, inode_chunk)) { - /* found it; */ - return the_chunk; - } - } - } - the_chunk++; - } - return -1; -} - -static int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk, - struct yaffs_ext_tags *tags) -{ - /*Get the Tnode, then get the level 0 offset chunk offset */ - struct yaffs_tnode *tn; - int the_chunk = -1; - struct yaffs_ext_tags local_tags; - int ret_val = -1; - - struct yaffs_dev *dev = in->my_dev; - - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &local_tags; - } - - tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); - - if (tn) { - the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); - - ret_val = - yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, - inode_chunk); - } - return ret_val; -} - -static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk, - struct yaffs_ext_tags *tags) -{ - /* Get the Tnode, then get the level 0 offset chunk offset */ - struct yaffs_tnode *tn; - int the_chunk = -1; - struct yaffs_ext_tags local_tags; - - struct yaffs_dev *dev = in->my_dev; - int ret_val = -1; - - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &local_tags; - } - - tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); - - if (tn) { - - the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); - - ret_val = - yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, - inode_chunk); - - /* Delete the entry in the filestructure (if found) */ - if (ret_val != -1) - yaffs_load_tnode_0(dev, tn, inode_chunk, 0); - } - - return ret_val; -} - -int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk, - int nand_chunk, int in_scan) -{ - /* NB in_scan is zero unless scanning. - * For forward scanning, in_scan is > 0; - * for backward scanning in_scan is < 0 - * - * nand_chunk = 0 is a dummy insert to make sure the tnodes are there. - */ - - struct yaffs_tnode *tn; - struct yaffs_dev *dev = in->my_dev; - int existing_cunk; - struct yaffs_ext_tags existing_tags; - struct yaffs_ext_tags new_tags; - unsigned existing_serial, new_serial; - - if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) { - /* Just ignore an attempt at putting a chunk into a non-file during scanning - * If it is not during Scanning then something went wrong! - */ - if (!in_scan) { - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy:attempt to put data chunk into a non-file" - ); - YBUG(); - } - - yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); - return YAFFS_OK; - } - - tn = yaffs_add_find_tnode_0(dev, - &in->variant.file_variant, - inode_chunk, NULL); - if (!tn) - return YAFFS_FAIL; - - if (!nand_chunk) - /* Dummy insert, bail now */ - return YAFFS_OK; - - existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk); - - if (in_scan != 0) { - /* If we're scanning then we need to test for duplicates - * NB This does not need to be efficient since it should only ever - * happen when the power fails during a write, then only one - * chunk should ever be affected. - * - * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO - * Update: For backward scanning we don't need to re-read tags so this is quite cheap. - */ - - if (existing_cunk > 0) { - /* NB Right now existing chunk will not be real chunk_id if the chunk group size > 1 - * thus we have to do a FindChunkInFile to get the real chunk id. - * - * We have a duplicate now we need to decide which one to use: - * - * Backwards scanning YAFFS2: The old one is what we use, dump the new one. - * Forward scanning YAFFS2: The new one is what we use, dump the old one. - * YAFFS1: Get both sets of tags and compare serial numbers. - */ - - if (in_scan > 0) { - /* Only do this for forward scanning */ - yaffs_rd_chunk_tags_nand(dev, - nand_chunk, - NULL, &new_tags); - - /* Do a proper find */ - existing_cunk = - yaffs_find_chunk_in_file(in, inode_chunk, - &existing_tags); - } - - if (existing_cunk <= 0) { - /*Hoosterman - how did this happen? */ - - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: existing chunk < 0 in scan" - ); - - } - - /* NB The deleted flags should be false, otherwise the chunks will - * not be loaded during a scan - */ - - if (in_scan > 0) { - new_serial = new_tags.serial_number; - existing_serial = existing_tags.serial_number; - } - - if ((in_scan > 0) && - (existing_cunk <= 0 || - ((existing_serial + 1) & 3) == new_serial)) { - /* Forward scanning. - * Use new - * Delete the old one and drop through to update the tnode - */ - yaffs_chunk_del(dev, existing_cunk, 1, - __LINE__); - } else { - /* Backward scanning or we want to use the existing one - * Use existing. - * Delete the new one and return early so that the tnode isn't changed - */ - yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); - return YAFFS_OK; - } - } - - } - - if (existing_cunk == 0) - in->n_data_chunks++; - - yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk); - - return YAFFS_OK; -} - -static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk) -{ - struct yaffs_block_info *the_block; - unsigned block_no; - - yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk); - - block_no = chunk / dev->param.chunks_per_block; - the_block = yaffs_get_block_info(dev, block_no); - if (the_block) { - the_block->soft_del_pages++; - dev->n_free_chunks++; - yaffs2_update_oldest_dirty_seq(dev, block_no, the_block); - } -} - -/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file. - * All soft deleting does is increment the block's softdelete count and pulls the chunk out - * of the tnode. - * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted. - */ - -static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn, - u32 level, int chunk_offset) -{ - int i; - int the_chunk; - int all_done = 1; - struct yaffs_dev *dev = in->my_dev; - - if (tn) { - if (level > 0) { - - for (i = YAFFS_NTNODES_INTERNAL - 1; all_done && i >= 0; - i--) { - if (tn->internal[i]) { - all_done = - yaffs_soft_del_worker(in, - tn->internal - [i], - level - 1, - (chunk_offset - << - YAFFS_TNODES_INTERNAL_BITS) - + i); - if (all_done) { - yaffs_free_tnode(dev, - tn->internal - [i]); - tn->internal[i] = NULL; - } else { - /* Hoosterman... how could this happen? */ - } - } - } - return (all_done) ? 1 : 0; - } else if (level == 0) { - - for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { - the_chunk = yaffs_get_group_base(dev, tn, i); - if (the_chunk) { - /* Note this does not find the real chunk, only the chunk group. - * We make an assumption that a chunk group is not larger than - * a block. - */ - yaffs_soft_del_chunk(dev, the_chunk); - yaffs_load_tnode_0(dev, tn, i, 0); - } - - } - return 1; - - } - - } - - return 1; - -} - -static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev = obj->my_dev; - struct yaffs_obj *parent; - - yaffs_verify_obj_in_dir(obj); - parent = obj->parent; - - yaffs_verify_dir(parent); - - if (dev && dev->param.remove_obj_fn) - dev->param.remove_obj_fn(obj); - - list_del_init(&obj->siblings); - obj->parent = NULL; - - yaffs_verify_dir(parent); -} - -void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj) -{ - if (!directory) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "tragedy: Trying to add an object to a null pointer directory" - ); - YBUG(); - return; - } - if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "tragedy: Trying to add an object to a non-directory" - ); - YBUG(); - } - - if (obj->siblings.prev == NULL) { - /* Not initialised */ - YBUG(); - } - - yaffs_verify_dir(directory); - - yaffs_remove_obj_from_dir(obj); - - /* Now add it */ - list_add(&obj->siblings, &directory->variant.dir_variant.children); - obj->parent = directory; - - if (directory == obj->my_dev->unlinked_dir - || directory == obj->my_dev->del_dir) { - obj->unlinked = 1; - obj->my_dev->n_unlinked_files++; - obj->rename_allowed = 0; - } - - yaffs_verify_dir(directory); - yaffs_verify_obj_in_dir(obj); -} - -static int yaffs_change_obj_name(struct yaffs_obj *obj, - struct yaffs_obj *new_dir, - const YCHAR * new_name, int force, int shadows) -{ - int unlink_op; - int del_op; - - struct yaffs_obj *existing_target; - - if (new_dir == NULL) - new_dir = obj->parent; /* use the old directory */ - - if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "tragedy: yaffs_change_obj_name: new_dir is not a directory" - ); - YBUG(); - } - - /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */ - if (obj->my_dev->param.is_yaffs2) - unlink_op = (new_dir == obj->my_dev->unlinked_dir); - else - unlink_op = (new_dir == obj->my_dev->unlinked_dir - && obj->variant_type == YAFFS_OBJECT_TYPE_FILE); - - del_op = (new_dir == obj->my_dev->del_dir); - - existing_target = yaffs_find_by_name(new_dir, new_name); - - /* If the object is a file going into the unlinked directory, - * then it is OK to just stuff it in since duplicate names are allowed. - * else only proceed if the new name does not exist and if we're putting - * it into a directory. - */ - if ((unlink_op || - del_op || - force || - (shadows > 0) || - !existing_target) && - new_dir->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_set_obj_name(obj, new_name); - obj->dirty = 1; - - yaffs_add_obj_to_dir(new_dir, obj); - - if (unlink_op) - obj->unlinked = 1; - - /* If it is a deletion then we mark it as a shrink for gc purposes. */ - if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= - 0) - return YAFFS_OK; - } - - return YAFFS_FAIL; -} - -/*------------------------ Short Operations Cache ---------------------------------------- - * In many situations where there is no high level buffering a lot of - * reads might be short sequential reads, and a lot of writes may be short - * sequential writes. eg. scanning/writing a jpeg file. - * In these cases, a short read/write cache can provide a huge perfomance - * benefit with dumb-as-a-rock code. - * In Linux, the page cache provides read buffering and the short op cache - * provides write buffering. - * - * There are a limited number (~10) of cache chunks per device so that we don't - * need a very intelligent search. - */ - -static int yaffs_obj_cache_dirty(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev = obj->my_dev; - int i; - struct yaffs_cache *cache; - int n_caches = obj->my_dev->param.n_caches; - - for (i = 0; i < n_caches; i++) { - cache = &dev->cache[i]; - if (cache->object == obj && cache->dirty) - return 1; - } - - return 0; -} - -static void yaffs_flush_file_cache(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev = obj->my_dev; - int lowest = -99; /* Stop compiler whining. */ - int i; - struct yaffs_cache *cache; - int chunk_written = 0; - int n_caches = obj->my_dev->param.n_caches; - - if (n_caches > 0) { - do { - cache = NULL; - - /* Find the dirty cache for this object with the lowest chunk id. */ - for (i = 0; i < n_caches; i++) { - if (dev->cache[i].object == obj && - dev->cache[i].dirty) { - if (!cache - || dev->cache[i].chunk_id < - lowest) { - cache = &dev->cache[i]; - lowest = cache->chunk_id; - } - } - } - - if (cache && !cache->locked) { - /* Write it out and free it up */ - - chunk_written = - yaffs_wr_data_obj(cache->object, - cache->chunk_id, - cache->data, - cache->n_bytes, 1); - cache->dirty = 0; - cache->object = NULL; - } - - } while (cache && chunk_written > 0); - - if (cache) - /* Hoosterman, disk full while writing cache out. */ - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: no space during cache write"); - - } - -} - -/*yaffs_flush_whole_cache(dev) - * - * - */ - -void yaffs_flush_whole_cache(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj; - int n_caches = dev->param.n_caches; - int i; - - /* Find a dirty object in the cache and flush it... - * until there are no further dirty objects. - */ - do { - obj = NULL; - for (i = 0; i < n_caches && !obj; i++) { - if (dev->cache[i].object && dev->cache[i].dirty) - obj = dev->cache[i].object; - - } - if (obj) - yaffs_flush_file_cache(obj); - - } while (obj); - -} - -/* Grab us a cache chunk for use. - * First look for an empty one. - * Then look for the least recently used non-dirty one. - * Then look for the least recently used dirty one...., flush and look again. - */ -static struct yaffs_cache *yaffs_grab_chunk_worker(struct yaffs_dev *dev) -{ - int i; - - if (dev->param.n_caches > 0) { - for (i = 0; i < dev->param.n_caches; i++) { - if (!dev->cache[i].object) - return &dev->cache[i]; - } - } - - return NULL; -} - -static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev) -{ - struct yaffs_cache *cache; - struct yaffs_obj *the_obj; - int usage; - int i; - int pushout; - - if (dev->param.n_caches > 0) { - /* Try find a non-dirty one... */ - - cache = yaffs_grab_chunk_worker(dev); - - if (!cache) { - /* They were all dirty, find the last recently used object and flush - * its cache, then find again. - * NB what's here is not very accurate, we actually flush the object - * the last recently used page. - */ - - /* With locking we can't assume we can use entry zero */ - - the_obj = NULL; - usage = -1; - cache = NULL; - pushout = -1; - - for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].object && - !dev->cache[i].locked && - (dev->cache[i].last_use < usage - || !cache)) { - usage = dev->cache[i].last_use; - the_obj = dev->cache[i].object; - cache = &dev->cache[i]; - pushout = i; - } - } - - if (!cache || cache->dirty) { - /* Flush and try again */ - yaffs_flush_file_cache(the_obj); - cache = yaffs_grab_chunk_worker(dev); - } - - } - return cache; - } else { - return NULL; - } -} - -/* Find a cached chunk */ -static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj, - int chunk_id) -{ - struct yaffs_dev *dev = obj->my_dev; - int i; - if (dev->param.n_caches > 0) { - for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].object == obj && - dev->cache[i].chunk_id == chunk_id) { - dev->cache_hits++; - - return &dev->cache[i]; - } - } - } - return NULL; -} - -/* Mark the chunk for the least recently used algorithym */ -static void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache, - int is_write) -{ - - if (dev->param.n_caches > 0) { - if (dev->cache_last_use < 0 || dev->cache_last_use > 100000000) { - /* Reset the cache usages */ - int i; - for (i = 1; i < dev->param.n_caches; i++) - dev->cache[i].last_use = 0; - - dev->cache_last_use = 0; - } - - dev->cache_last_use++; - - cache->last_use = dev->cache_last_use; - - if (is_write) - cache->dirty = 1; - } -} - -/* Invalidate a single cache page. - * Do this when a whole page gets written, - * ie the short cache for this page is no longer valid. - */ -static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id) -{ - if (object->my_dev->param.n_caches > 0) { - struct yaffs_cache *cache = - yaffs_find_chunk_cache(object, chunk_id); - - if (cache) - cache->object = NULL; - } -} - -/* Invalidate all the cache pages associated with this object - * Do this whenever ther file is deleted or resized. - */ -static void yaffs_invalidate_whole_cache(struct yaffs_obj *in) -{ - int i; - struct yaffs_dev *dev = in->my_dev; - - if (dev->param.n_caches > 0) { - /* Invalidate it. */ - for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].object == in) - dev->cache[i].object = NULL; - } - } -} - -static void yaffs_unhash_obj(struct yaffs_obj *obj) -{ - int bucket; - struct yaffs_dev *dev = obj->my_dev; - - /* If it is still linked into the bucket list, free from the list */ - if (!list_empty(&obj->hash_link)) { - list_del_init(&obj->hash_link); - bucket = yaffs_hash_fn(obj->obj_id); - dev->obj_bucket[bucket].count--; - } -} - -/* FreeObject frees up a Object and puts it back on the free list */ -static void yaffs_free_obj(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev = obj->my_dev; - - yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p", - obj, obj->my_inode); - - if (!obj) - YBUG(); - if (obj->parent) - YBUG(); - if (!list_empty(&obj->siblings)) - YBUG(); - - if (obj->my_inode) { - /* We're still hooked up to a cached inode. - * Don't delete now, but mark for later deletion - */ - obj->defered_free = 1; - return; - } - - yaffs_unhash_obj(obj); - - yaffs_free_raw_obj(dev, obj); - dev->n_obj--; - dev->checkpoint_blocks_required = 0; /* force recalculation */ -} - -void yaffs_handle_defered_free(struct yaffs_obj *obj) -{ - if (obj->defered_free) - yaffs_free_obj(obj); -} - -static int yaffs_generic_obj_del(struct yaffs_obj *in) -{ - - /* First off, invalidate the file's data in the cache, without flushing. */ - yaffs_invalidate_whole_cache(in); - - if (in->my_dev->param.is_yaffs2 && (in->parent != in->my_dev->del_dir)) { - /* Move to the unlinked directory so we have a record that it was deleted. */ - yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0, - 0); - - } - - yaffs_remove_obj_from_dir(in); - yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__); - in->hdr_chunk = 0; - - yaffs_free_obj(in); - return YAFFS_OK; - -} - -static void yaffs_soft_del_file(struct yaffs_obj *obj) -{ - if (obj->deleted && - obj->variant_type == YAFFS_OBJECT_TYPE_FILE && !obj->soft_del) { - if (obj->n_data_chunks <= 0) { - /* Empty file with no duplicate object headers, - * just delete it immediately */ - yaffs_free_tnode(obj->my_dev, - obj->variant.file_variant.top); - obj->variant.file_variant.top = NULL; - yaffs_trace(YAFFS_TRACE_TRACING, - "yaffs: Deleting empty file %d", - obj->obj_id); - yaffs_generic_obj_del(obj); - } else { - yaffs_soft_del_worker(obj, - obj->variant.file_variant.top, - obj->variant. - file_variant.top_level, 0); - obj->soft_del = 1; - } - } -} - -/* Pruning removes any part of the file structure tree that is beyond the - * bounds of the file (ie that does not point to chunks). - * - * A file should only get pruned when its size is reduced. - * - * Before pruning, the chunks must be pulled from the tree and the - * level 0 tnode entries must be zeroed out. - * Could also use this for file deletion, but that's probably better handled - * by a special case. - * - * This function is recursive. For levels > 0 the function is called again on - * any sub-tree. For level == 0 we just check if the sub-tree has data. - * If there is no data in a subtree then it is pruned. - */ - -static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev, - struct yaffs_tnode *tn, u32 level, - int del0) -{ - int i; - int has_data; - - if (tn) { - has_data = 0; - - if (level > 0) { - for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) { - tn->internal[i] = - yaffs_prune_worker(dev, - tn->internal[i], - level - 1, - (i == - 0) ? del0 : 1); - } - - if (tn->internal[i]) - has_data++; - } - } else { - int tnode_size_u32 = dev->tnode_size / sizeof(u32); - u32 *map = (u32 *) tn; - - for (i = 0; !has_data && i < tnode_size_u32; i++) { - if (map[i]) - has_data++; - } - } - - if (has_data == 0 && del0) { - /* Free and return NULL */ - - yaffs_free_tnode(dev, tn); - tn = NULL; - } - - } - - return tn; - -} - -static int yaffs_prune_tree(struct yaffs_dev *dev, - struct yaffs_file_var *file_struct) -{ - int i; - int has_data; - int done = 0; - struct yaffs_tnode *tn; - - if (file_struct->top_level > 0) { - file_struct->top = - yaffs_prune_worker(dev, file_struct->top, - file_struct->top_level, 0); - - /* Now we have a tree with all the non-zero branches NULL but the height - * is the same as it was. - * Let's see if we can trim internal tnodes to shorten the tree. - * We can do this if only the 0th element in the tnode is in use - * (ie all the non-zero are NULL) - */ - - while (file_struct->top_level && !done) { - tn = file_struct->top; - - has_data = 0; - for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) - has_data++; - } - - if (!has_data) { - file_struct->top = tn->internal[0]; - file_struct->top_level--; - yaffs_free_tnode(dev, tn); - } else { - done = 1; - } - } - } - - return YAFFS_OK; -} - -/*-------------------- End of File Structure functions.-------------------*/ - -/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ -static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev); - - if (obj) { - dev->n_obj++; - - /* Now sweeten it up... */ - - memset(obj, 0, sizeof(struct yaffs_obj)); - obj->being_created = 1; - - obj->my_dev = dev; - obj->hdr_chunk = 0; - obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN; - INIT_LIST_HEAD(&(obj->hard_links)); - INIT_LIST_HEAD(&(obj->hash_link)); - INIT_LIST_HEAD(&obj->siblings); - - /* Now make the directory sane */ - if (dev->root_dir) { - obj->parent = dev->root_dir; - list_add(&(obj->siblings), - &dev->root_dir->variant.dir_variant.children); - } - - /* Add it to the lost and found directory. - * NB Can't put root or lost-n-found in lost-n-found so - * check if lost-n-found exists first - */ - if (dev->lost_n_found) - yaffs_add_obj_to_dir(dev->lost_n_found, obj); - - obj->being_created = 0; - } - - dev->checkpoint_blocks_required = 0; /* force recalculation */ - - return obj; -} - -static int yaffs_find_nice_bucket(struct yaffs_dev *dev) -{ - int i; - int l = 999; - int lowest = 999999; - - /* Search for the shortest list or one that - * isn't too long. - */ - - for (i = 0; i < 10 && lowest > 4; i++) { - dev->bucket_finder++; - dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS; - if (dev->obj_bucket[dev->bucket_finder].count < lowest) { - lowest = dev->obj_bucket[dev->bucket_finder].count; - l = dev->bucket_finder; - } - - } - - return l; -} - -static int yaffs_new_obj_id(struct yaffs_dev *dev) -{ - int bucket = yaffs_find_nice_bucket(dev); - - /* Now find an object value that has not already been taken - * by scanning the list. - */ - - int found = 0; - struct list_head *i; - - u32 n = (u32) bucket; - - /* yaffs_check_obj_hash_sane(); */ - - while (!found) { - found = 1; - n += YAFFS_NOBJECT_BUCKETS; - if (1 || dev->obj_bucket[bucket].count > 0) { - list_for_each(i, &dev->obj_bucket[bucket].list) { - /* If there is already one in the list */ - if (i && list_entry(i, struct yaffs_obj, - hash_link)->obj_id == n) { - found = 0; - } - } - } - } - - return n; -} - -static void yaffs_hash_obj(struct yaffs_obj *in) -{ - int bucket = yaffs_hash_fn(in->obj_id); - struct yaffs_dev *dev = in->my_dev; - - list_add(&in->hash_link, &dev->obj_bucket[bucket].list); - dev->obj_bucket[bucket].count++; -} - -struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number) -{ - int bucket = yaffs_hash_fn(number); - struct list_head *i; - struct yaffs_obj *in; - - list_for_each(i, &dev->obj_bucket[bucket].list) { - /* Look if it is in the list */ - if (i) { - in = list_entry(i, struct yaffs_obj, hash_link); - if (in->obj_id == number) { - - /* Don't tell the VFS about this one if it is defered free */ - if (in->defered_free) - return NULL; - - return in; - } - } - } - - return NULL; -} - -struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number, - enum yaffs_obj_type type) -{ - struct yaffs_obj *the_obj = NULL; - struct yaffs_tnode *tn = NULL; - - if (number < 0) - number = yaffs_new_obj_id(dev); - - if (type == YAFFS_OBJECT_TYPE_FILE) { - tn = yaffs_get_tnode(dev); - if (!tn) - return NULL; - } - - the_obj = yaffs_alloc_empty_obj(dev); - if (!the_obj) { - if (tn) - yaffs_free_tnode(dev, tn); - return NULL; - } - - if (the_obj) { - the_obj->fake = 0; - the_obj->rename_allowed = 1; - the_obj->unlink_allowed = 1; - the_obj->obj_id = number; - yaffs_hash_obj(the_obj); - the_obj->variant_type = type; - yaffs_load_current_time(the_obj, 1, 1); - - switch (type) { - case YAFFS_OBJECT_TYPE_FILE: - the_obj->variant.file_variant.file_size = 0; - the_obj->variant.file_variant.scanned_size = 0; - the_obj->variant.file_variant.shrink_size = ~0; /* max */ - the_obj->variant.file_variant.top_level = 0; - the_obj->variant.file_variant.top = tn; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - INIT_LIST_HEAD(&the_obj->variant.dir_variant.children); - INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_SPECIAL: - /* No action required */ - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* todo this should not happen */ - break; - } - } - - return the_obj; -} - -static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev, - int number, u32 mode) -{ - - struct yaffs_obj *obj = - yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); - if (obj) { - obj->fake = 1; /* it is fake so it might have no NAND presence... */ - obj->rename_allowed = 0; /* ... and we're not allowed to rename it... */ - obj->unlink_allowed = 0; /* ... or unlink it */ - obj->deleted = 0; - obj->unlinked = 0; - obj->yst_mode = mode; - obj->my_dev = dev; - obj->hdr_chunk = 0; /* Not a valid chunk. */ - } - - return obj; - -} - - -static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev) -{ - int i; - - dev->n_obj = 0; - dev->n_tnodes = 0; - - yaffs_init_raw_tnodes_and_objs(dev); - - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - INIT_LIST_HEAD(&dev->obj_bucket[i].list); - dev->obj_bucket[i].count = 0; - } -} - -struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, - int number, - enum yaffs_obj_type type) -{ - struct yaffs_obj *the_obj = NULL; - - if (number > 0) - the_obj = yaffs_find_by_number(dev, number); - - if (!the_obj) - the_obj = yaffs_new_obj(dev, number, type); - - return the_obj; - -} - -YCHAR *yaffs_clone_str(const YCHAR * str) -{ - YCHAR *new_str = NULL; - int len; - - if (!str) - str = _Y(""); - - len = strnlen(str, YAFFS_MAX_ALIAS_LENGTH); - new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS); - if (new_str) { - strncpy(new_str, str, len); - new_str[len] = 0; - } - return new_str; - -} -/* - *yaffs_update_parent() handles fixing a directories mtime and ctime when a new - * link (ie. name) is created or deleted in the directory. - * - * ie. - * create dir/a : update dir's mtime/ctime - * rm dir/a: update dir's mtime/ctime - * modify dir/a: don't update dir's mtimme/ctime - * - * This can be handled immediately or defered. Defering helps reduce the number - * of updates when many files in a directory are changed within a brief period. - * - * If the directory updating is defered then yaffs_update_dirty_dirs must be - * called periodically. - */ - -static void yaffs_update_parent(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev; - if (!obj) - return; - dev = obj->my_dev; - obj->dirty = 1; - yaffs_load_current_time(obj, 0, 1); - if (dev->param.defered_dir_update) { - struct list_head *link = &obj->variant.dir_variant.dirty; - - if (list_empty(link)) { - list_add(link, &dev->dirty_dirs); - yaffs_trace(YAFFS_TRACE_BACKGROUND, - "Added object %d to dirty directories", - obj->obj_id); - } - - } else { - yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); - } -} - -void yaffs_update_dirty_dirs(struct yaffs_dev *dev) -{ - struct list_head *link; - struct yaffs_obj *obj; - struct yaffs_dir_var *d_s; - union yaffs_obj_var *o_v; - - yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories"); - - while (!list_empty(&dev->dirty_dirs)) { - link = dev->dirty_dirs.next; - list_del_init(link); - - d_s = list_entry(link, struct yaffs_dir_var, dirty); - o_v = list_entry(d_s, union yaffs_obj_var, dir_variant); - obj = list_entry(o_v, struct yaffs_obj, variant); - - yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d", - obj->obj_id); - - if (obj->dirty) - yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); - } -} - -/* - * Mknod (create) a new object. - * equiv_obj only has meaning for a hard link; - * alias_str only has meaning for a symlink. - * rdev only has meaning for devices (a subset of special objects) - */ - -static struct yaffs_obj *yaffs_create_obj(enum yaffs_obj_type type, - struct yaffs_obj *parent, - const YCHAR * name, - u32 mode, - u32 uid, - u32 gid, - struct yaffs_obj *equiv_obj, - const YCHAR * alias_str, u32 rdev) -{ - struct yaffs_obj *in; - YCHAR *str = NULL; - - struct yaffs_dev *dev = parent->my_dev; - - /* Check if the entry exists. If it does then fail the call since we don't want a dup. */ - if (yaffs_find_by_name(parent, name)) - return NULL; - - if (type == YAFFS_OBJECT_TYPE_SYMLINK) { - str = yaffs_clone_str(alias_str); - if (!str) - return NULL; - } - - in = yaffs_new_obj(dev, -1, type); - - if (!in) { - if (str) - kfree(str); - return NULL; - } - - if (in) { - in->hdr_chunk = 0; - in->valid = 1; - in->variant_type = type; - - in->yst_mode = mode; - - yaffs_attribs_init(in, gid, uid, rdev); - - in->n_data_chunks = 0; - - yaffs_set_obj_name(in, name); - in->dirty = 1; - - yaffs_add_obj_to_dir(parent, in); - - in->my_dev = parent->my_dev; - - switch (type) { - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symlink_variant.alias = str; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardlink_variant.equiv_obj = equiv_obj; - in->variant.hardlink_variant.equiv_id = - equiv_obj->obj_id; - list_add(&in->hard_links, &equiv_obj->hard_links); - break; - case YAFFS_OBJECT_TYPE_FILE: - case YAFFS_OBJECT_TYPE_DIRECTORY: - case YAFFS_OBJECT_TYPE_SPECIAL: - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* do nothing */ - break; - } - - if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) { - /* Could not create the object header, fail the creation */ - yaffs_del_obj(in); - in = NULL; - } - - yaffs_update_parent(parent); - } - - return in; -} - -struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, - const YCHAR * name, u32 mode, u32 uid, - u32 gid) -{ - return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, - uid, gid, NULL, NULL, 0); -} - -struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR * name, - u32 mode, u32 uid, u32 gid) -{ - return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, - mode, uid, gid, NULL, NULL, 0); -} - -struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent, - const YCHAR * name, u32 mode, u32 uid, - u32 gid, u32 rdev) -{ - return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, - uid, gid, NULL, NULL, rdev); -} - -struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent, - const YCHAR * name, u32 mode, u32 uid, - u32 gid, const YCHAR * alias) -{ - return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, - uid, gid, NULL, alias, 0); -} - -/* yaffs_link_obj returns the object id of the equivalent object.*/ -struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name, - struct yaffs_obj *equiv_obj) -{ - /* Get the real object in case we were fed a hard link as an equivalent object */ - equiv_obj = yaffs_get_equivalent_obj(equiv_obj); - - if (yaffs_create_obj - (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0, - equiv_obj, NULL, 0)) { - return equiv_obj; - } else { - return NULL; - } - -} - - - -/*------------------------- Block Management and Page Allocation ----------------*/ - -static int yaffs_init_blocks(struct yaffs_dev *dev) -{ - int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; - - dev->block_info = NULL; - dev->chunk_bits = NULL; - - dev->alloc_block = -1; /* force it to get a new one */ - - /* If the first allocation strategy fails, thry the alternate one */ - dev->block_info = - kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS); - if (!dev->block_info) { - dev->block_info = - vmalloc(n_blocks * sizeof(struct yaffs_block_info)); - dev->block_info_alt = 1; - } else { - dev->block_info_alt = 0; - } - - if (dev->block_info) { - /* Set up dynamic blockinfo stuff. Round up bytes. */ - dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8; - dev->chunk_bits = - kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS); - if (!dev->chunk_bits) { - dev->chunk_bits = - vmalloc(dev->chunk_bit_stride * n_blocks); - dev->chunk_bits_alt = 1; - } else { - dev->chunk_bits_alt = 0; - } - } - - if (dev->block_info && dev->chunk_bits) { - memset(dev->block_info, 0, - n_blocks * sizeof(struct yaffs_block_info)); - memset(dev->chunk_bits, 0, dev->chunk_bit_stride * n_blocks); - return YAFFS_OK; - } - - return YAFFS_FAIL; -} - -static void yaffs_deinit_blocks(struct yaffs_dev *dev) -{ - if (dev->block_info_alt && dev->block_info) - vfree(dev->block_info); - else if (dev->block_info) - kfree(dev->block_info); - - dev->block_info_alt = 0; - - dev->block_info = NULL; - - if (dev->chunk_bits_alt && dev->chunk_bits) - vfree(dev->chunk_bits); - else if (dev->chunk_bits) - kfree(dev->chunk_bits); - dev->chunk_bits_alt = 0; - dev->chunk_bits = NULL; -} - -void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no) -{ - struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no); - - int erased_ok = 0; - - /* If the block is still healthy erase it and mark as clean. - * If the block has had a data failure, then retire it. - */ - - yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, - "yaffs_block_became_dirty block %d state %d %s", - block_no, bi->block_state, - (bi->needs_retiring) ? "needs retiring" : ""); - - yaffs2_clear_oldest_dirty_seq(dev, bi); - - bi->block_state = YAFFS_BLOCK_STATE_DIRTY; - - /* If this is the block being garbage collected then stop gc'ing this block */ - if (block_no == dev->gc_block) - dev->gc_block = 0; - - /* If this block is currently the best candidate for gc then drop as a candidate */ - if (block_no == dev->gc_dirtiest) { - dev->gc_dirtiest = 0; - dev->gc_pages_in_use = 0; - } - - if (!bi->needs_retiring) { - yaffs2_checkpt_invalidate(dev); - erased_ok = yaffs_erase_block(dev, block_no); - if (!erased_ok) { - dev->n_erase_failures++; - yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - "**>> Erasure failed %d", block_no); - } - } - - if (erased_ok && - ((yaffs_trace_mask & YAFFS_TRACE_ERASE) - || !yaffs_skip_verification(dev))) { - int i; - for (i = 0; i < dev->param.chunks_per_block; i++) { - if (!yaffs_check_chunk_erased - (dev, block_no * dev->param.chunks_per_block + i)) { - yaffs_trace(YAFFS_TRACE_ERROR, - ">>Block %d erasure supposedly OK, but chunk %d not erased", - block_no, i); - } - } - } - - if (erased_ok) { - /* Clean it up... */ - bi->block_state = YAFFS_BLOCK_STATE_EMPTY; - bi->seq_number = 0; - dev->n_erased_blocks++; - bi->pages_in_use = 0; - bi->soft_del_pages = 0; - bi->has_shrink_hdr = 0; - bi->skip_erased_check = 1; /* Clean, so no need to check */ - bi->gc_prioritise = 0; - yaffs_clear_chunk_bits(dev, block_no); - - yaffs_trace(YAFFS_TRACE_ERASE, - "Erased block %d", block_no); - } else { - /* We lost a block of free space */ - dev->n_free_chunks -= dev->param.chunks_per_block; - yaffs_retire_block(dev, block_no); - yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - "**>> Block %d retired", block_no); - } -} - - - -static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block) -{ - int old_chunk; - int new_chunk; - int mark_flash; - int ret_val = YAFFS_OK; - int i; - int is_checkpt_block; - int matching_chunk; - int max_copies; - - int chunks_before = yaffs_get_erased_chunks(dev); - int chunks_after; - - struct yaffs_ext_tags tags; - - struct yaffs_block_info *bi = yaffs_get_block_info(dev, block); - - struct yaffs_obj *object; - - is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT); - - yaffs_trace(YAFFS_TRACE_TRACING, - "Collecting block %d, in use %d, shrink %d, whole_block %d", - block, bi->pages_in_use, bi->has_shrink_hdr, - whole_block); - - /*yaffs_verify_free_chunks(dev); */ - - if (bi->block_state == YAFFS_BLOCK_STATE_FULL) - bi->block_state = YAFFS_BLOCK_STATE_COLLECTING; - - bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */ - - dev->gc_disable = 1; - - if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) { - yaffs_trace(YAFFS_TRACE_TRACING, - "Collecting block %d that has no chunks in use", - block); - yaffs_block_became_dirty(dev, block); - } else { - - u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); - - yaffs_verify_blk(dev, bi, block); - - max_copies = (whole_block) ? dev->param.chunks_per_block : 5; - old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk; - - for ( /* init already done */ ; - ret_val == YAFFS_OK && - dev->gc_chunk < dev->param.chunks_per_block && - (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) && - max_copies > 0; dev->gc_chunk++, old_chunk++) { - if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) { - - /* This page is in use and might need to be copied off */ - - max_copies--; - - mark_flash = 1; - - yaffs_init_tags(&tags); - - yaffs_rd_chunk_tags_nand(dev, old_chunk, - buffer, &tags); - - object = yaffs_find_by_number(dev, tags.obj_id); - - yaffs_trace(YAFFS_TRACE_GC_DETAIL, - "Collecting chunk in block %d, %d %d %d ", - dev->gc_chunk, tags.obj_id, - tags.chunk_id, tags.n_bytes); - - if (object && !yaffs_skip_verification(dev)) { - if (tags.chunk_id == 0) - matching_chunk = - object->hdr_chunk; - else if (object->soft_del) - matching_chunk = old_chunk; /* Defeat the test */ - else - matching_chunk = - yaffs_find_chunk_in_file - (object, tags.chunk_id, - NULL); - - if (old_chunk != matching_chunk) - yaffs_trace(YAFFS_TRACE_ERROR, - "gc: page in gc mismatch: %d %d %d %d", - old_chunk, - matching_chunk, - tags.obj_id, - tags.chunk_id); - - } - - if (!object) { - yaffs_trace(YAFFS_TRACE_ERROR, - "page %d in gc has no object: %d %d %d ", - old_chunk, - tags.obj_id, tags.chunk_id, - tags.n_bytes); - } - - if (object && - object->deleted && - object->soft_del && tags.chunk_id != 0) { - /* Data chunk in a soft deleted file, throw it away - * It's a soft deleted data chunk, - * No need to copy this, just forget about it and - * fix up the object. - */ - - /* Free chunks already includes softdeleted chunks. - * How ever this chunk is going to soon be really deleted - * which will increment free chunks. - * We have to decrement free chunks so this works out properly. - */ - dev->n_free_chunks--; - bi->soft_del_pages--; - - object->n_data_chunks--; - - if (object->n_data_chunks <= 0) { - /* remeber to clean up the object */ - dev->gc_cleanup_list[dev-> - n_clean_ups] - = tags.obj_id; - dev->n_clean_ups++; - } - mark_flash = 0; - } else if (0) { - /* Todo object && object->deleted && object->n_data_chunks == 0 */ - /* Deleted object header with no data chunks. - * Can be discarded and the file deleted. - */ - object->hdr_chunk = 0; - yaffs_free_tnode(object->my_dev, - object-> - variant.file_variant. - top); - object->variant.file_variant.top = NULL; - yaffs_generic_obj_del(object); - - } else if (object) { - /* It's either a data chunk in a live file or - * an ObjectHeader, so we're interested in it. - * NB Need to keep the ObjectHeaders of deleted files - * until the whole file has been deleted off - */ - tags.serial_number++; - - dev->n_gc_copies++; - - if (tags.chunk_id == 0) { - /* It is an object Id, - * We need to nuke the shrinkheader flags first - * Also need to clean up shadowing. - * We no longer want the shrink_header flag since its work is done - * and if it is left in place it will mess up scanning. - */ - - struct yaffs_obj_hdr *oh; - oh = (struct yaffs_obj_hdr *) - buffer; - - oh->is_shrink = 0; - tags.extra_is_shrink = 0; - - oh->shadows_obj = 0; - oh->inband_shadowed_obj_id = 0; - tags.extra_shadows = 0; - - /* Update file size */ - if (object->variant_type == - YAFFS_OBJECT_TYPE_FILE) { - oh->file_size = - object->variant. - file_variant. - file_size; - tags.extra_length = - oh->file_size; - } - - yaffs_verify_oh(object, oh, - &tags, 1); - new_chunk = - yaffs_write_new_chunk(dev, - (u8 *) - oh, - &tags, - 1); - } else { - new_chunk = - yaffs_write_new_chunk(dev, - buffer, - &tags, - 1); - } - - if (new_chunk < 0) { - ret_val = YAFFS_FAIL; - } else { - - /* Ok, now fix up the Tnodes etc. */ - - if (tags.chunk_id == 0) { - /* It's a header */ - object->hdr_chunk = - new_chunk; - object->serial = - tags.serial_number; - } else { - /* It's a data chunk */ - int ok; - ok = yaffs_put_chunk_in_file(object, tags.chunk_id, new_chunk, 0); - } - } - } - - if (ret_val == YAFFS_OK) - yaffs_chunk_del(dev, old_chunk, - mark_flash, __LINE__); - - } - } - - yaffs_release_temp_buffer(dev, buffer, __LINE__); - - } - - yaffs_verify_collected_blk(dev, bi, block); - - if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { - /* - * The gc did not complete. Set block state back to FULL - * because checkpointing does not restore gc. - */ - bi->block_state = YAFFS_BLOCK_STATE_FULL; - } else { - /* The gc completed. */ - /* Do any required cleanups */ - for (i = 0; i < dev->n_clean_ups; i++) { - /* Time to delete the file too */ - object = - yaffs_find_by_number(dev, dev->gc_cleanup_list[i]); - if (object) { - yaffs_free_tnode(dev, - object->variant. - file_variant.top); - object->variant.file_variant.top = NULL; - yaffs_trace(YAFFS_TRACE_GC, - "yaffs: About to finally delete object %d", - object->obj_id); - yaffs_generic_obj_del(object); - object->my_dev->n_deleted_files--; - } - - } - - chunks_after = yaffs_get_erased_chunks(dev); - if (chunks_before >= chunks_after) - yaffs_trace(YAFFS_TRACE_GC, - "gc did not increase free chunks before %d after %d", - chunks_before, chunks_after); - dev->gc_block = 0; - dev->gc_chunk = 0; - dev->n_clean_ups = 0; - } - - dev->gc_disable = 0; - - return ret_val; -} - -/* - * FindBlockForgarbageCollection is used to select the dirtiest block (or close enough) - * for garbage collection. - */ - -static unsigned yaffs_find_gc_block(struct yaffs_dev *dev, - int aggressive, int background) -{ - int i; - int iterations; - unsigned selected = 0; - int prioritised = 0; - int prioritised_exist = 0; - struct yaffs_block_info *bi; - int threshold; - - /* First let's see if we need to grab a prioritised block */ - if (dev->has_pending_prioritised_gc && !aggressive) { - dev->gc_dirtiest = 0; - bi = dev->block_info; - for (i = dev->internal_start_block; - i <= dev->internal_end_block && !selected; i++) { - - if (bi->gc_prioritise) { - prioritised_exist = 1; - if (bi->block_state == YAFFS_BLOCK_STATE_FULL && - yaffs_block_ok_for_gc(dev, bi)) { - selected = i; - prioritised = 1; - } - } - bi++; - } - - /* - * If there is a prioritised block and none was selected then - * this happened because there is at least one old dirty block gumming - * up the works. Let's gc the oldest dirty block. - */ - - if (prioritised_exist && - !selected && dev->oldest_dirty_block > 0) - selected = dev->oldest_dirty_block; - - if (!prioritised_exist) /* None found, so we can clear this */ - dev->has_pending_prioritised_gc = 0; - } - - /* If we're doing aggressive GC then we are happy to take a less-dirty block, and - * search harder. - * else (we're doing a leasurely gc), then we only bother to do this if the - * block has only a few pages in use. - */ - - if (!selected) { - int pages_used; - int n_blocks = - dev->internal_end_block - dev->internal_start_block + 1; - if (aggressive) { - threshold = dev->param.chunks_per_block; - iterations = n_blocks; - } else { - int max_threshold; - - if (background) - max_threshold = dev->param.chunks_per_block / 2; - else - max_threshold = dev->param.chunks_per_block / 8; - - if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD) - max_threshold = YAFFS_GC_PASSIVE_THRESHOLD; - - threshold = background ? (dev->gc_not_done + 2) * 2 : 0; - if (threshold < YAFFS_GC_PASSIVE_THRESHOLD) - threshold = YAFFS_GC_PASSIVE_THRESHOLD; - if (threshold > max_threshold) - threshold = max_threshold; - - iterations = n_blocks / 16 + 1; - if (iterations > 100) - iterations = 100; - } - - for (i = 0; - i < iterations && - (dev->gc_dirtiest < 1 || - dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH); i++) { - dev->gc_block_finder++; - if (dev->gc_block_finder < dev->internal_start_block || - dev->gc_block_finder > dev->internal_end_block) - dev->gc_block_finder = - dev->internal_start_block; - - bi = yaffs_get_block_info(dev, dev->gc_block_finder); - - pages_used = bi->pages_in_use - bi->soft_del_pages; - - if (bi->block_state == YAFFS_BLOCK_STATE_FULL && - pages_used < dev->param.chunks_per_block && - (dev->gc_dirtiest < 1 - || pages_used < dev->gc_pages_in_use) - && yaffs_block_ok_for_gc(dev, bi)) { - dev->gc_dirtiest = dev->gc_block_finder; - dev->gc_pages_in_use = pages_used; - } - } - - if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold) - selected = dev->gc_dirtiest; - } - - /* - * If nothing has been selected for a while, try selecting the oldest dirty - * because that's gumming up the works. - */ - - if (!selected && dev->param.is_yaffs2 && - dev->gc_not_done >= (background ? 10 : 20)) { - yaffs2_find_oldest_dirty_seq(dev); - if (dev->oldest_dirty_block > 0) { - selected = dev->oldest_dirty_block; - dev->gc_dirtiest = selected; - dev->oldest_dirty_gc_count++; - bi = yaffs_get_block_info(dev, selected); - dev->gc_pages_in_use = - bi->pages_in_use - bi->soft_del_pages; - } else { - dev->gc_not_done = 0; - } - } - - if (selected) { - yaffs_trace(YAFFS_TRACE_GC, - "GC Selected block %d with %d free, prioritised:%d", - selected, - dev->param.chunks_per_block - dev->gc_pages_in_use, - prioritised); - - dev->n_gc_blocks++; - if (background) - dev->bg_gcs++; - - dev->gc_dirtiest = 0; - dev->gc_pages_in_use = 0; - dev->gc_not_done = 0; - if (dev->refresh_skip > 0) - dev->refresh_skip--; - } else { - dev->gc_not_done++; - yaffs_trace(YAFFS_TRACE_GC, - "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s", - dev->gc_block_finder, dev->gc_not_done, threshold, - dev->gc_dirtiest, dev->gc_pages_in_use, - dev->oldest_dirty_block, background ? " bg" : ""); - } - - return selected; -} - -/* New garbage collector - * If we're very low on erased blocks then we do aggressive garbage collection - * otherwise we do "leasurely" garbage collection. - * Aggressive gc looks further (whole array) and will accept less dirty blocks. - * Passive gc only inspects smaller areas and will only accept more dirty blocks. - * - * The idea is to help clear out space in a more spread-out manner. - * Dunno if it really does anything useful. - */ -static int yaffs_check_gc(struct yaffs_dev *dev, int background) -{ - int aggressive = 0; - int gc_ok = YAFFS_OK; - int max_tries = 0; - int min_erased; - int erased_chunks; - int checkpt_block_adjust; - - if (dev->param.gc_control && (dev->param.gc_control(dev) & 1) == 0) - return YAFFS_OK; - - if (dev->gc_disable) { - /* Bail out so we don't get recursive gc */ - return YAFFS_OK; - } - - /* This loop should pass the first time. - * We'll only see looping here if the collection does not increase space. - */ - - do { - max_tries++; - - checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev); - - min_erased = - dev->param.n_reserved_blocks + checkpt_block_adjust + 1; - erased_chunks = - dev->n_erased_blocks * dev->param.chunks_per_block; - - /* If we need a block soon then do aggressive gc. */ - if (dev->n_erased_blocks < min_erased) - aggressive = 1; - else { - if (!background - && erased_chunks > (dev->n_free_chunks / 4)) - break; - - if (dev->gc_skip > 20) - dev->gc_skip = 20; - if (erased_chunks < dev->n_free_chunks / 2 || - dev->gc_skip < 1 || background) - aggressive = 0; - else { - dev->gc_skip--; - break; - } - } - - dev->gc_skip = 5; - - /* If we don't already have a block being gc'd then see if we should start another */ - - if (dev->gc_block < 1 && !aggressive) { - dev->gc_block = yaffs2_find_refresh_block(dev); - dev->gc_chunk = 0; - dev->n_clean_ups = 0; - } - if (dev->gc_block < 1) { - dev->gc_block = - yaffs_find_gc_block(dev, aggressive, background); - dev->gc_chunk = 0; - dev->n_clean_ups = 0; - } - - if (dev->gc_block > 0) { - dev->all_gcs++; - if (!aggressive) - dev->passive_gc_count++; - - yaffs_trace(YAFFS_TRACE_GC, - "yaffs: GC n_erased_blocks %d aggressive %d", - dev->n_erased_blocks, aggressive); - - gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive); - } - - if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) - && dev->gc_block > 0) { - yaffs_trace(YAFFS_TRACE_GC, - "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d", - dev->n_erased_blocks, max_tries, - dev->gc_block); - } - } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) && - (dev->gc_block > 0) && (max_tries < 2)); - - return aggressive ? gc_ok : YAFFS_OK; -} - -/* - * yaffs_bg_gc() - * Garbage collects. Intended to be called from a background thread. - * Returns non-zero if at least half the free chunks are erased. - */ -int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency) -{ - int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block; - - yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency); - - yaffs_check_gc(dev, 1); - return erased_chunks > dev->n_free_chunks / 2; -} - -/*-------------------- Data file manipulation -----------------*/ - -static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer) -{ - int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL); - - if (nand_chunk >= 0) - return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk, - buffer, NULL); - else { - yaffs_trace(YAFFS_TRACE_NANDACCESS, - "Chunk %d not found zero instead", - nand_chunk); - /* get sane (zero) data if you read a hole */ - memset(buffer, 0, in->my_dev->data_bytes_per_chunk); - return 0; - } - -} - -void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, - int lyn) -{ - int block; - int page; - struct yaffs_ext_tags tags; - struct yaffs_block_info *bi; - - if (chunk_id <= 0) - return; - - dev->n_deletions++; - block = chunk_id / dev->param.chunks_per_block; - page = chunk_id % dev->param.chunks_per_block; - - if (!yaffs_check_chunk_bit(dev, block, page)) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Deleting invalid chunk %d", chunk_id); - - bi = yaffs_get_block_info(dev, block); - - yaffs2_update_oldest_dirty_seq(dev, block, bi); - - yaffs_trace(YAFFS_TRACE_DELETION, - "line %d delete of chunk %d", - lyn, chunk_id); - - if (!dev->param.is_yaffs2 && mark_flash && - bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) { - - yaffs_init_tags(&tags); - - tags.is_deleted = 1; - - yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags); - yaffs_handle_chunk_update(dev, chunk_id, &tags); - } else { - dev->n_unmarked_deletions++; - } - - /* Pull out of the management area. - * If the whole block became dirty, this will kick off an erasure. - */ - if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING || - bi->block_state == YAFFS_BLOCK_STATE_FULL || - bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { - dev->n_free_chunks++; - - yaffs_clear_chunk_bit(dev, block, page); - - bi->pages_in_use--; - - if (bi->pages_in_use == 0 && - !bi->has_shrink_hdr && - bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING && - bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - yaffs_block_became_dirty(dev, block); - } - - } - -} - -static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, - const u8 * buffer, int n_bytes, int use_reserve) -{ - /* Find old chunk Need to do this to get serial number - * Write new one and patch into tree. - * Invalidate old tags. - */ - - int prev_chunk_id; - struct yaffs_ext_tags prev_tags; - - int new_chunk_id; - struct yaffs_ext_tags new_tags; - - struct yaffs_dev *dev = in->my_dev; - - yaffs_check_gc(dev, 0); - - /* Get the previous chunk at this location in the file if it exists. - * If it does not exist then put a zero into the tree. This creates - * the tnode now, rather than later when it is harder to clean up. - */ - prev_chunk_id = yaffs_find_chunk_in_file(in, inode_chunk, &prev_tags); - if (prev_chunk_id < 1 && - !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0)) - return 0; - - /* Set up new tags */ - yaffs_init_tags(&new_tags); - - new_tags.chunk_id = inode_chunk; - new_tags.obj_id = in->obj_id; - new_tags.serial_number = - (prev_chunk_id > 0) ? prev_tags.serial_number + 1 : 1; - new_tags.n_bytes = n_bytes; - - if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) { - yaffs_trace(YAFFS_TRACE_ERROR, - "Writing %d bytes to chunk!!!!!!!!!", - n_bytes); - YBUG(); - } - - new_chunk_id = - yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve); - - if (new_chunk_id > 0) { - yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0); - - if (prev_chunk_id > 0) - yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); - - yaffs_verify_file_sane(in); - } - return new_chunk_id; - -} - - - -static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set, - const YCHAR * name, const void *value, int size, - int flags) -{ - struct yaffs_xattr_mod xmod; - - int result; - - xmod.set = set; - xmod.name = name; - xmod.data = value; - xmod.size = size; - xmod.flags = flags; - xmod.result = -ENOSPC; - - result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod); - - if (result > 0) - return xmod.result; - else - return -ENOSPC; -} - -static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer, - struct yaffs_xattr_mod *xmod) -{ - int retval = 0; - int x_offs = sizeof(struct yaffs_obj_hdr); - struct yaffs_dev *dev = obj->my_dev; - int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); - - char *x_buffer = buffer + x_offs; - - if (xmod->set) - retval = - nval_set(x_buffer, x_size, xmod->name, xmod->data, - xmod->size, xmod->flags); - else - retval = nval_del(x_buffer, x_size, xmod->name); - - obj->has_xattr = nval_hasvalues(x_buffer, x_size); - obj->xattr_known = 1; - - xmod->result = retval; - - return retval; -} - -static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR * name, - void *value, int size) -{ - char *buffer = NULL; - int result; - struct yaffs_ext_tags tags; - struct yaffs_dev *dev = obj->my_dev; - int x_offs = sizeof(struct yaffs_obj_hdr); - int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); - - char *x_buffer; - - int retval = 0; - - if (obj->hdr_chunk < 1) - return -ENODATA; - - /* If we know that the object has no xattribs then don't do all the - * reading and parsing. - */ - if (obj->xattr_known && !obj->has_xattr) { - if (name) - return -ENODATA; - else - return 0; - } - - buffer = (char *)yaffs_get_temp_buffer(dev, __LINE__); - if (!buffer) - return -ENOMEM; - - result = - yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags); - - if (result != YAFFS_OK) - retval = -ENOENT; - else { - x_buffer = buffer + x_offs; - - if (!obj->xattr_known) { - obj->has_xattr = nval_hasvalues(x_buffer, x_size); - obj->xattr_known = 1; - } - - if (name) - retval = nval_get(x_buffer, x_size, name, value, size); - else - retval = nval_list(x_buffer, x_size, value, size); - } - yaffs_release_temp_buffer(dev, (u8 *) buffer, __LINE__); - return retval; -} - -int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name, - const void *value, int size, int flags) -{ - return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags); -} - -int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name) -{ - return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0); -} - -int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value, - int size) -{ - return yaffs_do_xattrib_fetch(obj, name, value, size); -} - -int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size) -{ - return yaffs_do_xattrib_fetch(obj, NULL, buffer, size); -} - -static void yaffs_check_obj_details_loaded(struct yaffs_obj *in) -{ - u8 *chunk_data; - struct yaffs_obj_hdr *oh; - struct yaffs_dev *dev; - struct yaffs_ext_tags tags; - int result; - int alloc_failed = 0; - - if (!in) - return; - - dev = in->my_dev; - - if (in->lazy_loaded && in->hdr_chunk > 0) { - in->lazy_loaded = 0; - chunk_data = yaffs_get_temp_buffer(dev, __LINE__); - - result = - yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, chunk_data, - &tags); - oh = (struct yaffs_obj_hdr *)chunk_data; - - in->yst_mode = oh->yst_mode; - yaffs_load_attribs(in, oh); - yaffs_set_obj_name_from_oh(in, oh); - - if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { - in->variant.symlink_variant.alias = - yaffs_clone_str(oh->alias); - if (!in->variant.symlink_variant.alias) - alloc_failed = 1; /* Not returned to caller */ - } - - yaffs_release_temp_buffer(dev, chunk_data, __LINE__); - } -} - -static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR * name, - const YCHAR * oh_name, int buff_size) -{ -#ifdef CONFIG_YAFFS_AUTO_UNICODE - if (dev->param.auto_unicode) { - if (*oh_name) { - /* It is an ASCII name, do an ASCII to - * unicode conversion */ - const char *ascii_oh_name = (const char *)oh_name; - int n = buff_size - 1; - while (n > 0 && *ascii_oh_name) { - *name = *ascii_oh_name; - name++; - ascii_oh_name++; - n--; - } - } else { - strncpy(name, oh_name + 1, buff_size - 1); - } - } else { -#else - { -#endif - strncpy(name, oh_name, buff_size - 1); - } -} - -static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR * oh_name, - const YCHAR * name) -{ -#ifdef CONFIG_YAFFS_AUTO_UNICODE - - int is_ascii; - YCHAR *w; - - if (dev->param.auto_unicode) { - - is_ascii = 1; - w = name; - - /* Figure out if the name will fit in ascii character set */ - while (is_ascii && *w) { - if ((*w) & 0xff00) - is_ascii = 0; - w++; - } - - if (is_ascii) { - /* It is an ASCII name, so do a unicode to ascii conversion */ - char *ascii_oh_name = (char *)oh_name; - int n = YAFFS_MAX_NAME_LENGTH - 1; - while (n > 0 && *name) { - *ascii_oh_name = *name; - name++; - ascii_oh_name++; - n--; - } - } else { - /* It is a unicode name, so save starting at the second YCHAR */ - *oh_name = 0; - strncpy(oh_name + 1, name, - YAFFS_MAX_NAME_LENGTH - 2); - } - } else { -#else - { -#endif - strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1); - } - -} - -/* UpdateObjectHeader updates the header on NAND for an object. - * If name is not NULL, then that new name is used. - */ -int yaffs_update_oh(struct yaffs_obj *in, const YCHAR * name, int force, - int is_shrink, int shadows, struct yaffs_xattr_mod *xmod) -{ - - struct yaffs_block_info *bi; - - struct yaffs_dev *dev = in->my_dev; - - int prev_chunk_id; - int ret_val = 0; - int result = 0; - - int new_chunk_id; - struct yaffs_ext_tags new_tags; - struct yaffs_ext_tags old_tags; - const YCHAR *alias = NULL; - - u8 *buffer = NULL; - YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1]; - - struct yaffs_obj_hdr *oh = NULL; - - strcpy(old_name, _Y("silly old name")); - - if (!in->fake || in == dev->root_dir || - force || xmod) { - - yaffs_check_gc(dev, 0); - yaffs_check_obj_details_loaded(in); - - buffer = yaffs_get_temp_buffer(in->my_dev, __LINE__); - oh = (struct yaffs_obj_hdr *)buffer; - - prev_chunk_id = in->hdr_chunk; - - if (prev_chunk_id > 0) { - result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id, - buffer, &old_tags); - - yaffs_verify_oh(in, oh, &old_tags, 0); - - memcpy(old_name, oh->name, sizeof(oh->name)); - memset(buffer, 0xFF, sizeof(struct yaffs_obj_hdr)); - } else { - memset(buffer, 0xFF, dev->data_bytes_per_chunk); - } - - oh->type = in->variant_type; - oh->yst_mode = in->yst_mode; - oh->shadows_obj = oh->inband_shadowed_obj_id = shadows; - - yaffs_load_attribs_oh(oh, in); - - if (in->parent) - oh->parent_obj_id = in->parent->obj_id; - else - oh->parent_obj_id = 0; - - if (name && *name) { - memset(oh->name, 0, sizeof(oh->name)); - yaffs_load_oh_from_name(dev, oh->name, name); - } else if (prev_chunk_id > 0) { - memcpy(oh->name, old_name, sizeof(oh->name)); - } else { - memset(oh->name, 0, sizeof(oh->name)); - } - - oh->is_shrink = is_shrink; - - switch (in->variant_type) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Should not happen */ - break; - case YAFFS_OBJECT_TYPE_FILE: - oh->file_size = - (oh->parent_obj_id == YAFFS_OBJECTID_DELETED - || oh->parent_obj_id == - YAFFS_OBJECTID_UNLINKED) ? 0 : in-> - variant.file_variant.file_size; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - oh->equiv_id = in->variant.hardlink_variant.equiv_id; - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - alias = in->variant.symlink_variant.alias; - if (!alias) - alias = _Y("no alias"); - strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH); - oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; - break; - } - - /* process any xattrib modifications */ - if (xmod) - yaffs_apply_xattrib_mod(in, (char *)buffer, xmod); - - /* Tags */ - yaffs_init_tags(&new_tags); - in->serial++; - new_tags.chunk_id = 0; - new_tags.obj_id = in->obj_id; - new_tags.serial_number = in->serial; - - /* Add extra info for file header */ - - new_tags.extra_available = 1; - new_tags.extra_parent_id = oh->parent_obj_id; - new_tags.extra_length = oh->file_size; - new_tags.extra_is_shrink = oh->is_shrink; - new_tags.extra_equiv_id = oh->equiv_id; - new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0; - new_tags.extra_obj_type = in->variant_type; - - yaffs_verify_oh(in, oh, &new_tags, 1); - - /* Create new chunk in NAND */ - new_chunk_id = - yaffs_write_new_chunk(dev, buffer, &new_tags, - (prev_chunk_id > 0) ? 1 : 0); - - if (new_chunk_id >= 0) { - - in->hdr_chunk = new_chunk_id; - - if (prev_chunk_id > 0) { - yaffs_chunk_del(dev, prev_chunk_id, 1, - __LINE__); - } - - if (!yaffs_obj_cache_dirty(in)) - in->dirty = 0; - - /* If this was a shrink, then mark the block that the chunk lives on */ - if (is_shrink) { - bi = yaffs_get_block_info(in->my_dev, - new_chunk_id / - in->my_dev->param. - chunks_per_block); - bi->has_shrink_hdr = 1; - } - - } - - ret_val = new_chunk_id; - - } - - if (buffer) - yaffs_release_temp_buffer(dev, buffer, __LINE__); - - return ret_val; -} - -/*--------------------- File read/write ------------------------ - * Read and write have very similar structures. - * In general the read/write has three parts to it - * An incomplete chunk to start with (if the read/write is not chunk-aligned) - * Some complete chunks - * An incomplete chunk to end off with - * - * Curve-balls: the first chunk might also be the last chunk. - */ - -int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes) -{ - - int chunk; - u32 start; - int n_copy; - int n = n_bytes; - int n_done = 0; - struct yaffs_cache *cache; - - struct yaffs_dev *dev; - - dev = in->my_dev; - - while (n > 0) { - /* chunk = offset / dev->data_bytes_per_chunk + 1; */ - /* start = offset % dev->data_bytes_per_chunk; */ - yaffs_addr_to_chunk(dev, offset, &chunk, &start); - chunk++; - - /* OK now check for the curveball where the start and end are in - * the same chunk. - */ - if ((start + n) < dev->data_bytes_per_chunk) - n_copy = n; - else - n_copy = dev->data_bytes_per_chunk - start; - - cache = yaffs_find_chunk_cache(in, chunk); - - /* If the chunk is already in the cache or it is less than a whole chunk - * or we're using inband tags then use the cache (if there is caching) - * else bypass the cache. - */ - if (cache || n_copy != dev->data_bytes_per_chunk - || dev->param.inband_tags) { - if (dev->param.n_caches > 0) { - - /* If we can't find the data in the cache, then load it up. */ - - if (!cache) { - cache = - yaffs_grab_chunk_cache(in->my_dev); - cache->object = in; - cache->chunk_id = chunk; - cache->dirty = 0; - cache->locked = 0; - yaffs_rd_data_obj(in, chunk, - cache->data); - cache->n_bytes = 0; - } - - yaffs_use_cache(dev, cache, 0); - - cache->locked = 1; - - memcpy(buffer, &cache->data[start], n_copy); - - cache->locked = 0; - } else { - /* Read into the local buffer then copy.. */ - - u8 *local_buffer = - yaffs_get_temp_buffer(dev, __LINE__); - yaffs_rd_data_obj(in, chunk, local_buffer); - - memcpy(buffer, &local_buffer[start], n_copy); - - yaffs_release_temp_buffer(dev, local_buffer, - __LINE__); - } - - } else { - - /* A full chunk. Read directly into the supplied buffer. */ - yaffs_rd_data_obj(in, chunk, buffer); - - } - - n -= n_copy; - offset += n_copy; - buffer += n_copy; - n_done += n_copy; - - } - - return n_done; -} - -int yaffs_do_file_wr(struct yaffs_obj *in, const u8 * buffer, loff_t offset, - int n_bytes, int write_trhrough) -{ - - int chunk; - u32 start; - int n_copy; - int n = n_bytes; - int n_done = 0; - int n_writeback; - int start_write = offset; - int chunk_written = 0; - u32 n_bytes_read; - u32 chunk_start; - - struct yaffs_dev *dev; - - dev = in->my_dev; - - while (n > 0 && chunk_written >= 0) { - yaffs_addr_to_chunk(dev, offset, &chunk, &start); - - if (chunk * dev->data_bytes_per_chunk + start != offset || - start >= dev->data_bytes_per_chunk) { - yaffs_trace(YAFFS_TRACE_ERROR, - "AddrToChunk of offset %d gives chunk %d start %d", - (int)offset, chunk, start); - } - chunk++; /* File pos to chunk in file offset */ - - /* OK now check for the curveball where the start and end are in - * the same chunk. - */ - - if ((start + n) < dev->data_bytes_per_chunk) { - n_copy = n; - - /* Now folks, to calculate how many bytes to write back.... - * If we're overwriting and not writing to then end of file then - * we need to write back as much as was there before. - */ - - chunk_start = ((chunk - 1) * dev->data_bytes_per_chunk); - - if (chunk_start > in->variant.file_variant.file_size) - n_bytes_read = 0; /* Past end of file */ - else - n_bytes_read = - in->variant.file_variant.file_size - - chunk_start; - - if (n_bytes_read > dev->data_bytes_per_chunk) - n_bytes_read = dev->data_bytes_per_chunk; - - n_writeback = - (n_bytes_read > - (start + n)) ? n_bytes_read : (start + n); - - if (n_writeback < 0 - || n_writeback > dev->data_bytes_per_chunk) - YBUG(); - - } else { - n_copy = dev->data_bytes_per_chunk - start; - n_writeback = dev->data_bytes_per_chunk; - } - - if (n_copy != dev->data_bytes_per_chunk - || dev->param.inband_tags) { - /* An incomplete start or end chunk (or maybe both start and end chunk), - * or we're using inband tags, so we want to use the cache buffers. - */ - if (dev->param.n_caches > 0) { - struct yaffs_cache *cache; - /* If we can't find the data in the cache, then load the cache */ - cache = yaffs_find_chunk_cache(in, chunk); - - if (!cache - && yaffs_check_alloc_available(dev, 1)) { - cache = yaffs_grab_chunk_cache(dev); - cache->object = in; - cache->chunk_id = chunk; - cache->dirty = 0; - cache->locked = 0; - yaffs_rd_data_obj(in, chunk, - cache->data); - } else if (cache && - !cache->dirty && - !yaffs_check_alloc_available(dev, - 1)) { - /* Drop the cache if it was a read cache item and - * no space check has been made for it. - */ - cache = NULL; - } - - if (cache) { - yaffs_use_cache(dev, cache, 1); - cache->locked = 1; - - memcpy(&cache->data[start], buffer, - n_copy); - - cache->locked = 0; - cache->n_bytes = n_writeback; - - if (write_trhrough) { - chunk_written = - yaffs_wr_data_obj - (cache->object, - cache->chunk_id, - cache->data, - cache->n_bytes, 1); - cache->dirty = 0; - } - - } else { - chunk_written = -1; /* fail the write */ - } - } else { - /* An incomplete start or end chunk (or maybe both start and end chunk) - * Read into the local buffer then copy, then copy over and write back. - */ - - u8 *local_buffer = - yaffs_get_temp_buffer(dev, __LINE__); - - yaffs_rd_data_obj(in, chunk, local_buffer); - - memcpy(&local_buffer[start], buffer, n_copy); - - chunk_written = - yaffs_wr_data_obj(in, chunk, - local_buffer, - n_writeback, 0); - - yaffs_release_temp_buffer(dev, local_buffer, - __LINE__); - - } - - } else { - /* A full chunk. Write directly from the supplied buffer. */ - - chunk_written = - yaffs_wr_data_obj(in, chunk, buffer, - dev->data_bytes_per_chunk, 0); - - /* Since we've overwritten the cached data, we better invalidate it. */ - yaffs_invalidate_chunk_cache(in, chunk); - } - - if (chunk_written >= 0) { - n -= n_copy; - offset += n_copy; - buffer += n_copy; - n_done += n_copy; - } - - } - - /* Update file object */ - - if ((start_write + n_done) > in->variant.file_variant.file_size) - in->variant.file_variant.file_size = (start_write + n_done); - - in->dirty = 1; - - return n_done; -} - -int yaffs_wr_file(struct yaffs_obj *in, const u8 * buffer, loff_t offset, - int n_bytes, int write_trhrough) -{ - yaffs2_handle_hole(in, offset); - return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_trhrough); -} - -/* ---------------------- File resizing stuff ------------------ */ - -static void yaffs_prune_chunks(struct yaffs_obj *in, int new_size) -{ - - struct yaffs_dev *dev = in->my_dev; - int old_size = in->variant.file_variant.file_size; - - int last_del = 1 + (old_size - 1) / dev->data_bytes_per_chunk; - - int start_del = 1 + (new_size + dev->data_bytes_per_chunk - 1) / - dev->data_bytes_per_chunk; - int i; - int chunk_id; - - /* Delete backwards so that we don't end up with holes if - * power is lost part-way through the operation. - */ - for (i = last_del; i >= start_del; i--) { - /* NB this could be optimised somewhat, - * eg. could retrieve the tags and write them without - * using yaffs_chunk_del - */ - - chunk_id = yaffs_find_del_file_chunk(in, i, NULL); - if (chunk_id > 0) { - if (chunk_id < - (dev->internal_start_block * - dev->param.chunks_per_block) - || chunk_id >= - ((dev->internal_end_block + - 1) * dev->param.chunks_per_block)) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Found daft chunk_id %d for %d", - chunk_id, i); - } else { - in->n_data_chunks--; - yaffs_chunk_del(dev, chunk_id, 1, __LINE__); - } - } - } - -} - -void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size) -{ - int new_full; - u32 new_partial; - struct yaffs_dev *dev = obj->my_dev; - - yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial); - - yaffs_prune_chunks(obj, new_size); - - if (new_partial != 0) { - int last_chunk = 1 + new_full; - u8 *local_buffer = yaffs_get_temp_buffer(dev, __LINE__); - - /* Rewrite the last chunk with its new size and zero pad */ - yaffs_rd_data_obj(obj, last_chunk, local_buffer); - memset(local_buffer + new_partial, 0, - dev->data_bytes_per_chunk - new_partial); - - yaffs_wr_data_obj(obj, last_chunk, local_buffer, - new_partial, 1); - - yaffs_release_temp_buffer(dev, local_buffer, __LINE__); - } - - obj->variant.file_variant.file_size = new_size; - - yaffs_prune_tree(dev, &obj->variant.file_variant); -} - -int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size) -{ - struct yaffs_dev *dev = in->my_dev; - int old_size = in->variant.file_variant.file_size; - - yaffs_flush_file_cache(in); - yaffs_invalidate_whole_cache(in); - - yaffs_check_gc(dev, 0); - - if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) - return YAFFS_FAIL; - - if (new_size == old_size) - return YAFFS_OK; - - if (new_size > old_size) { - yaffs2_handle_hole(in, new_size); - in->variant.file_variant.file_size = new_size; - } else { - /* new_size < old_size */ - yaffs_resize_file_down(in, new_size); - } - - /* Write a new object header to reflect the resize. - * show we've shrunk the file, if need be - * Do this only if the file is not in the deleted directories - * and is not shadowed. - */ - if (in->parent && - !in->is_shadowed && - in->parent->obj_id != YAFFS_OBJECTID_UNLINKED && - in->parent->obj_id != YAFFS_OBJECTID_DELETED) - yaffs_update_oh(in, NULL, 0, 0, 0, NULL); - - return YAFFS_OK; -} - -int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync) -{ - int ret_val; - if (in->dirty) { - yaffs_flush_file_cache(in); - if (data_sync) /* Only sync data */ - ret_val = YAFFS_OK; - else { - if (update_time) - yaffs_load_current_time(in, 0, 0); - - ret_val = (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= - 0) ? YAFFS_OK : YAFFS_FAIL; - } - } else { - ret_val = YAFFS_OK; - } - - return ret_val; - -} - - -/* yaffs_del_file deletes the whole file data - * and the inode associated with the file. - * It does not delete the links associated with the file. - */ -static int yaffs_unlink_file_if_needed(struct yaffs_obj *in) -{ - - int ret_val; - int del_now = 0; - struct yaffs_dev *dev = in->my_dev; - - if (!in->my_inode) - del_now = 1; - - if (del_now) { - ret_val = - yaffs_change_obj_name(in, in->my_dev->del_dir, - _Y("deleted"), 0, 0); - yaffs_trace(YAFFS_TRACE_TRACING, - "yaffs: immediate deletion of file %d", - in->obj_id); - in->deleted = 1; - in->my_dev->n_deleted_files++; - if (dev->param.disable_soft_del || dev->param.is_yaffs2) - yaffs_resize_file(in, 0); - yaffs_soft_del_file(in); - } else { - ret_val = - yaffs_change_obj_name(in, in->my_dev->unlinked_dir, - _Y("unlinked"), 0, 0); - } - - return ret_val; -} - -int yaffs_del_file(struct yaffs_obj *in) -{ - int ret_val = YAFFS_OK; - int deleted; /* Need to cache value on stack if in is freed */ - struct yaffs_dev *dev = in->my_dev; - - if (dev->param.disable_soft_del || dev->param.is_yaffs2) - yaffs_resize_file(in, 0); - - if (in->n_data_chunks > 0) { - /* Use soft deletion if there is data in the file. - * That won't be the case if it has been resized to zero. - */ - if (!in->unlinked) - ret_val = yaffs_unlink_file_if_needed(in); - - deleted = in->deleted; - - if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) { - in->deleted = 1; - deleted = 1; - in->my_dev->n_deleted_files++; - yaffs_soft_del_file(in); - } - return deleted ? YAFFS_OK : YAFFS_FAIL; - } else { - /* The file has no data chunks so we toss it immediately */ - yaffs_free_tnode(in->my_dev, in->variant.file_variant.top); - in->variant.file_variant.top = NULL; - yaffs_generic_obj_del(in); - - return YAFFS_OK; - } -} - -int yaffs_is_non_empty_dir(struct yaffs_obj *obj) -{ - return (obj && - obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) && - !(list_empty(&obj->variant.dir_variant.children)); -} - -static int yaffs_del_dir(struct yaffs_obj *obj) -{ - /* First check that the directory is empty. */ - if (yaffs_is_non_empty_dir(obj)) - return YAFFS_FAIL; - - return yaffs_generic_obj_del(obj); -} - -static int yaffs_del_symlink(struct yaffs_obj *in) -{ - if (in->variant.symlink_variant.alias) - kfree(in->variant.symlink_variant.alias); - in->variant.symlink_variant.alias = NULL; - - return yaffs_generic_obj_del(in); -} - -static int yaffs_del_link(struct yaffs_obj *in) -{ - /* remove this hardlink from the list assocaited with the equivalent - * object - */ - list_del_init(&in->hard_links); - return yaffs_generic_obj_del(in); -} - -int yaffs_del_obj(struct yaffs_obj *obj) -{ - int ret_val = -1; - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - ret_val = yaffs_del_file(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - if (!list_empty(&obj->variant.dir_variant.dirty)) { - yaffs_trace(YAFFS_TRACE_BACKGROUND, - "Remove object %d from dirty directories", - obj->obj_id); - list_del_init(&obj->variant.dir_variant.dirty); - } - return yaffs_del_dir(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - ret_val = yaffs_del_symlink(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - ret_val = yaffs_del_link(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - ret_val = yaffs_generic_obj_del(obj); - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - ret_val = 0; - break; /* should not happen. */ - } - - return ret_val; -} - -static int yaffs_unlink_worker(struct yaffs_obj *obj) -{ - - int del_now = 0; - - if (!obj->my_inode) - del_now = 1; - - if (obj) - yaffs_update_parent(obj->parent); - - if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { - return yaffs_del_link(obj); - } else if (!list_empty(&obj->hard_links)) { - /* Curve ball: We're unlinking an object that has a hardlink. - * - * This problem arises because we are not strictly following - * The Linux link/inode model. - * - * We can't really delete the object. - * Instead, we do the following: - * - Select a hardlink. - * - Unhook it from the hard links - * - Move it from its parent directory (so that the rename can work) - * - Rename the object to the hardlink's name. - * - Delete the hardlink - */ - - struct yaffs_obj *hl; - struct yaffs_obj *parent; - int ret_val; - YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - - hl = list_entry(obj->hard_links.next, struct yaffs_obj, - hard_links); - - yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1); - parent = hl->parent; - - list_del_init(&hl->hard_links); - - yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl); - - ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0); - - if (ret_val == YAFFS_OK) - ret_val = yaffs_generic_obj_del(hl); - - return ret_val; - - } else if (del_now) { - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - return yaffs_del_file(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - list_del_init(&obj->variant.dir_variant.dirty); - return yaffs_del_dir(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - return yaffs_del_symlink(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - return yaffs_generic_obj_del(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_UNKNOWN: - default: - return YAFFS_FAIL; - } - } else if (yaffs_is_non_empty_dir(obj)) { - return YAFFS_FAIL; - } else { - return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir, - _Y("unlinked"), 0, 0); - } -} - -static int yaffs_unlink_obj(struct yaffs_obj *obj) -{ - - if (obj && obj->unlink_allowed) - return yaffs_unlink_worker(obj); - - return YAFFS_FAIL; - -} - -int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name) -{ - struct yaffs_obj *obj; - - obj = yaffs_find_by_name(dir, name); - return yaffs_unlink_obj(obj); -} - -/* Note: - * If old_name is NULL then we take old_dir as the object to be renamed. - */ -int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name, - struct yaffs_obj *new_dir, const YCHAR * new_name) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *existing_target = NULL; - int force = 0; - int result; - struct yaffs_dev *dev; - - if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - YBUG(); - if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - YBUG(); - - dev = old_dir->my_dev; - -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - /* Special case for case insemsitive systems. - * While look-up is case insensitive, the name isn't. - * Therefore we might want to change x.txt to X.txt - */ - if (old_dir == new_dir && - old_name && new_name && - strcmp(old_name, new_name) == 0) - force = 1; -#endif - - if (strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) > - YAFFS_MAX_NAME_LENGTH) - /* ENAMETOOLONG */ - return YAFFS_FAIL; - - if(old_name) - obj = yaffs_find_by_name(old_dir, old_name); - else{ - obj = old_dir; - old_dir = obj->parent; - } - - - if (obj && obj->rename_allowed) { - - /* Now do the handling for an existing target, if there is one */ - - existing_target = yaffs_find_by_name(new_dir, new_name); - if (yaffs_is_non_empty_dir(existing_target)){ - return YAFFS_FAIL; /* ENOTEMPTY */ - } else if (existing_target && existing_target != obj) { - /* Nuke the target first, using shadowing, - * but only if it isn't the same object. - * - * Note we must disable gc otherwise it can mess up the shadowing. - * - */ - dev->gc_disable = 1; - yaffs_change_obj_name(obj, new_dir, new_name, force, - existing_target->obj_id); - existing_target->is_shadowed = 1; - yaffs_unlink_obj(existing_target); - dev->gc_disable = 0; - } - - result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0); - - yaffs_update_parent(old_dir); - if (new_dir != old_dir) - yaffs_update_parent(new_dir); - - return result; - } - return YAFFS_FAIL; -} - -/*----------------------- Initialisation Scanning ---------------------- */ - -void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, - int backward_scanning) -{ - struct yaffs_obj *obj; - - if (!backward_scanning) { - /* Handle YAFFS1 forward scanning case - * For YAFFS1 we always do the deletion - */ - - } else { - /* Handle YAFFS2 case (backward scanning) - * If the shadowed object exists then ignore. - */ - obj = yaffs_find_by_number(dev, obj_id); - if (obj) - return; - } - - /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc. - * We put it in unlinked dir to be cleaned up after the scanning - */ - obj = - yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE); - if (!obj) - return; - obj->is_shadowed = 1; - yaffs_add_obj_to_dir(dev->unlinked_dir, obj); - obj->variant.file_variant.shrink_size = 0; - obj->valid = 1; /* So that we don't read any other info for this file */ - -} - -void yaffs_link_fixup(struct yaffs_dev *dev, struct yaffs_obj *hard_list) -{ - struct yaffs_obj *hl; - struct yaffs_obj *in; - - while (hard_list) { - hl = hard_list; - hard_list = (struct yaffs_obj *)(hard_list->hard_links.next); - - in = yaffs_find_by_number(dev, - hl->variant. - hardlink_variant.equiv_id); - - if (in) { - /* Add the hardlink pointers */ - hl->variant.hardlink_variant.equiv_obj = in; - list_add(&hl->hard_links, &in->hard_links); - } else { - /* Todo Need to report/handle this better. - * Got a problem... hardlink to a non-existant object - */ - hl->variant.hardlink_variant.equiv_obj = NULL; - INIT_LIST_HEAD(&hl->hard_links); - - } - } -} - -static void yaffs_strip_deleted_objs(struct yaffs_dev *dev) -{ - /* - * Sort out state of unlinked and deleted objects after scanning. - */ - struct list_head *i; - struct list_head *n; - struct yaffs_obj *l; - - if (dev->read_only) - return; - - /* Soft delete all the unlinked files */ - list_for_each_safe(i, n, - &dev->unlinked_dir->variant.dir_variant.children) { - if (i) { - l = list_entry(i, struct yaffs_obj, siblings); - yaffs_del_obj(l); - } - } - - list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) { - if (i) { - l = list_entry(i, struct yaffs_obj, siblings); - yaffs_del_obj(l); - } - } - -} - -/* - * This code iterates through all the objects making sure that they are rooted. - * Any unrooted objects are re-rooted in lost+found. - * An object needs to be in one of: - * - Directly under deleted, unlinked - * - Directly or indirectly under root. - * - * Note: - * This code assumes that we don't ever change the current relationships between - * directories: - * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL - * lost-n-found->parent == root_dir - * - * This fixes the problem where directories might have inadvertently been deleted - * leaving the object "hanging" without being rooted in the directory tree. - */ - -static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj) -{ - return (obj == dev->del_dir || - obj == dev->unlinked_dir || obj == dev->root_dir); -} - -static void yaffs_fix_hanging_objs(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj; - struct yaffs_obj *parent; - int i; - struct list_head *lh; - struct list_head *n; - int depth_limit; - int hanging; - - if (dev->read_only) - return; - - /* Iterate through the objects in each hash entry, - * looking at each object. - * Make sure it is rooted. - */ - - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - list_for_each_safe(lh, n, &dev->obj_bucket[i].list) { - if (lh) { - obj = - list_entry(lh, struct yaffs_obj, hash_link); - parent = obj->parent; - - if (yaffs_has_null_parent(dev, obj)) { - /* These directories are not hanging */ - hanging = 0; - } else if (!parent - || parent->variant_type != - YAFFS_OBJECT_TYPE_DIRECTORY) { - hanging = 1; - } else if (yaffs_has_null_parent(dev, parent)) { - hanging = 0; - } else { - /* - * Need to follow the parent chain to see if it is hanging. - */ - hanging = 0; - depth_limit = 100; - - while (parent != dev->root_dir && - parent->parent && - parent->parent->variant_type == - YAFFS_OBJECT_TYPE_DIRECTORY - && depth_limit > 0) { - parent = parent->parent; - depth_limit--; - } - if (parent != dev->root_dir) - hanging = 1; - } - if (hanging) { - yaffs_trace(YAFFS_TRACE_SCAN, - "Hanging object %d moved to lost and found", - obj->obj_id); - yaffs_add_obj_to_dir(dev->lost_n_found, - obj); - } - } - } - } -} - -/* - * Delete directory contents for cleaning up lost and found. - */ -static void yaffs_del_dir_contents(struct yaffs_obj *dir) -{ - struct yaffs_obj *obj; - struct list_head *lh; - struct list_head *n; - - if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - YBUG(); - - list_for_each_safe(lh, n, &dir->variant.dir_variant.children) { - if (lh) { - obj = list_entry(lh, struct yaffs_obj, siblings); - if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) - yaffs_del_dir_contents(obj); - - yaffs_trace(YAFFS_TRACE_SCAN, - "Deleting lost_found object %d", - obj->obj_id); - - /* Need to use UnlinkObject since Delete would not handle - * hardlinked objects correctly. - */ - yaffs_unlink_obj(obj); - } - } - -} - -static void yaffs_empty_l_n_f(struct yaffs_dev *dev) -{ - yaffs_del_dir_contents(dev->lost_n_found); -} - - -struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory, - const YCHAR * name) -{ - int sum; - - struct list_head *i; - YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1]; - - struct yaffs_obj *l; - - if (!name) - return NULL; - - if (!directory) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "tragedy: yaffs_find_by_name: null pointer directory" - ); - YBUG(); - return NULL; - } - if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "tragedy: yaffs_find_by_name: non-directory" - ); - YBUG(); - } - - sum = yaffs_calc_name_sum(name); - - list_for_each(i, &directory->variant.dir_variant.children) { - if (i) { - l = list_entry(i, struct yaffs_obj, siblings); - - if (l->parent != directory) - YBUG(); - - yaffs_check_obj_details_loaded(l); - - /* Special case for lost-n-found */ - if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { - if (!strcmp(name, YAFFS_LOSTNFOUND_NAME)) - return l; - } else if (l->sum == sum - || l->hdr_chunk <= 0) { - /* LostnFound chunk called Objxxx - * Do a real check - */ - yaffs_get_obj_name(l, buffer, - YAFFS_MAX_NAME_LENGTH + 1); - if (strncmp - (name, buffer, YAFFS_MAX_NAME_LENGTH) == 0) - return l; - } - } - } - - return NULL; -} - -/* GetEquivalentObject dereferences any hard links to get to the - * actual object. - */ - -struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj) -{ - if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { - /* We want the object id of the equivalent object, not this one */ - obj = obj->variant.hardlink_variant.equiv_obj; - yaffs_check_obj_details_loaded(obj); - } - return obj; -} - -/* - * A note or two on object names. - * * If the object name is missing, we then make one up in the form objnnn - * - * * ASCII names are stored in the object header's name field from byte zero - * * Unicode names are historically stored starting from byte zero. - * - * Then there are automatic Unicode names... - * The purpose of these is to save names in a way that can be read as - * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII - * system to share files. - * - * These automatic unicode are stored slightly differently... - * - If the name can fit in the ASCII character space then they are saved as - * ascii names as per above. - * - If the name needs Unicode then the name is saved in Unicode - * starting at oh->name[1]. - - */ -static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR * name, - int buffer_size) -{ - /* Create an object name if we could not find one. */ - if (strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) { - YCHAR local_name[20]; - YCHAR num_string[20]; - YCHAR *x = &num_string[19]; - unsigned v = obj->obj_id; - num_string[19] = 0; - while (v > 0) { - x--; - *x = '0' + (v % 10); - v /= 10; - } - /* make up a name */ - strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX); - strcat(local_name, x); - strncpy(name, local_name, buffer_size - 1); - } -} - -int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size) -{ - memset(name, 0, buffer_size * sizeof(YCHAR)); - - yaffs_check_obj_details_loaded(obj); - - if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { - strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1); - } -#ifndef CONFIG_YAFFS_NO_SHORT_NAMES - else if (obj->short_name[0]) { - strcpy(name, obj->short_name); - } -#endif - else if (obj->hdr_chunk > 0) { - int result; - u8 *buffer = yaffs_get_temp_buffer(obj->my_dev, __LINE__); - - struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer; - - memset(buffer, 0, obj->my_dev->data_bytes_per_chunk); - - if (obj->hdr_chunk > 0) { - result = yaffs_rd_chunk_tags_nand(obj->my_dev, - obj->hdr_chunk, - buffer, NULL); - } - yaffs_load_name_from_oh(obj->my_dev, name, oh->name, - buffer_size); - - yaffs_release_temp_buffer(obj->my_dev, buffer, __LINE__); - } - - yaffs_fix_null_name(obj, name, buffer_size); - - return strnlen(name, YAFFS_MAX_NAME_LENGTH); -} - -int yaffs_get_obj_length(struct yaffs_obj *obj) -{ - /* Dereference any hard linking */ - obj = yaffs_get_equivalent_obj(obj); - - if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) - return obj->variant.file_variant.file_size; - if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { - if (!obj->variant.symlink_variant.alias) - return 0; - return strnlen(obj->variant.symlink_variant.alias, - YAFFS_MAX_ALIAS_LENGTH); - } else { - /* Only a directory should drop through to here */ - return obj->my_dev->data_bytes_per_chunk; - } -} - -int yaffs_get_obj_link_count(struct yaffs_obj *obj) -{ - int count = 0; - struct list_head *i; - - if (!obj->unlinked) - count++; /* the object itself */ - - list_for_each(i, &obj->hard_links) - count++; /* add the hard links; */ - - return count; -} - -int yaffs_get_obj_inode(struct yaffs_obj *obj) -{ - obj = yaffs_get_equivalent_obj(obj); - - return obj->obj_id; -} - -unsigned yaffs_get_obj_type(struct yaffs_obj *obj) -{ - obj = yaffs_get_equivalent_obj(obj); - - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - return DT_REG; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - return DT_DIR; - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - return DT_LNK; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - return DT_REG; - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - if (S_ISFIFO(obj->yst_mode)) - return DT_FIFO; - if (S_ISCHR(obj->yst_mode)) - return DT_CHR; - if (S_ISBLK(obj->yst_mode)) - return DT_BLK; - if (S_ISSOCK(obj->yst_mode)) - return DT_SOCK; - default: - return DT_REG; - break; - } -} - -YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj) -{ - obj = yaffs_get_equivalent_obj(obj); - if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) - return yaffs_clone_str(obj->variant.symlink_variant.alias); - else - return yaffs_clone_str(_Y("")); -} - -/*--------------------------- Initialisation code -------------------------- */ - -static int yaffs_check_dev_fns(const struct yaffs_dev *dev) -{ - - /* Common functions, gotta have */ - if (!dev->param.erase_fn || !dev->param.initialise_flash_fn) - return 0; - -#ifdef CONFIG_YAFFS_YAFFS2 - - /* Can use the "with tags" style interface for yaffs1 or yaffs2 */ - if (dev->param.write_chunk_tags_fn && - dev->param.read_chunk_tags_fn && - !dev->param.write_chunk_fn && - !dev->param.read_chunk_fn && - dev->param.bad_block_fn && dev->param.query_block_fn) - return 1; -#endif - - /* Can use the "spare" style interface for yaffs1 */ - if (!dev->param.is_yaffs2 && - !dev->param.write_chunk_tags_fn && - !dev->param.read_chunk_tags_fn && - dev->param.write_chunk_fn && - dev->param.read_chunk_fn && - !dev->param.bad_block_fn && !dev->param.query_block_fn) - return 1; - - return 0; /* bad */ -} - -static int yaffs_create_initial_dir(struct yaffs_dev *dev) -{ - /* Initialise the unlinked, deleted, root and lost and found directories */ - - dev->lost_n_found = dev->root_dir = NULL; - dev->unlinked_dir = dev->del_dir = NULL; - - dev->unlinked_dir = - yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); - - dev->del_dir = - yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); - - dev->root_dir = - yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT, - YAFFS_ROOT_MODE | S_IFDIR); - dev->lost_n_found = - yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND, - YAFFS_LOSTNFOUND_MODE | S_IFDIR); - - if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir - && dev->del_dir) { - yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found); - return YAFFS_OK; - } - - return YAFFS_FAIL; -} - -int yaffs_guts_initialise(struct yaffs_dev *dev) -{ - int init_failed = 0; - unsigned x; - int bits; - - yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_guts_initialise()" ); - - /* Check stuff that must be set */ - - if (!dev) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs: Need a device" - ); - return YAFFS_FAIL; - } - - dev->internal_start_block = dev->param.start_block; - dev->internal_end_block = dev->param.end_block; - dev->block_offset = 0; - dev->chunk_offset = 0; - dev->n_free_chunks = 0; - - dev->gc_block = 0; - - if (dev->param.start_block == 0) { - dev->internal_start_block = dev->param.start_block + 1; - dev->internal_end_block = dev->param.end_block + 1; - dev->block_offset = 1; - dev->chunk_offset = dev->param.chunks_per_block; - } - - /* Check geometry parameters. */ - - if ((!dev->param.inband_tags && dev->param.is_yaffs2 && - dev->param.total_bytes_per_chunk < 1024) || - (!dev->param.is_yaffs2 && - dev->param.total_bytes_per_chunk < 512) || - (dev->param.inband_tags && !dev->param.is_yaffs2) || - dev->param.chunks_per_block < 2 || - dev->param.n_reserved_blocks < 2 || - dev->internal_start_block <= 0 || - dev->internal_end_block <= 0 || - dev->internal_end_block <= - (dev->internal_start_block + dev->param.n_reserved_blocks + 2) - ) { - /* otherwise it is too small */ - yaffs_trace(YAFFS_TRACE_ALWAYS, - "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ", - dev->param.total_bytes_per_chunk, - dev->param.is_yaffs2 ? "2" : "", - dev->param.inband_tags); - return YAFFS_FAIL; - } - - if (yaffs_init_nand(dev) != YAFFS_OK) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed"); - return YAFFS_FAIL; - } - - /* Sort out space for inband tags, if required */ - if (dev->param.inband_tags) - dev->data_bytes_per_chunk = - dev->param.total_bytes_per_chunk - - sizeof(struct yaffs_packed_tags2_tags_only); - else - dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk; - - /* Got the right mix of functions? */ - if (!yaffs_check_dev_fns(dev)) { - /* Function missing */ - yaffs_trace(YAFFS_TRACE_ALWAYS, - "device function(s) missing or wrong"); - - return YAFFS_FAIL; - } - - if (dev->is_mounted) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted"); - return YAFFS_FAIL; - } - - /* Finished with most checks. One or two more checks happen later on too. */ - - dev->is_mounted = 1; - - /* OK now calculate a few things for the device */ - - /* - * Calculate all the chunk size manipulation numbers: - */ - x = dev->data_bytes_per_chunk; - /* We always use dev->chunk_shift and dev->chunk_div */ - dev->chunk_shift = calc_shifts(x); - x >>= dev->chunk_shift; - dev->chunk_div = x; - /* We only use chunk mask if chunk_div is 1 */ - dev->chunk_mask = (1 << dev->chunk_shift) - 1; - - /* - * Calculate chunk_grp_bits. - * We need to find the next power of 2 > than internal_end_block - */ - - x = dev->param.chunks_per_block * (dev->internal_end_block + 1); - - bits = calc_shifts_ceiling(x); - - /* Set up tnode width if wide tnodes are enabled. */ - if (!dev->param.wide_tnodes_disabled) { - /* bits must be even so that we end up with 32-bit words */ - if (bits & 1) - bits++; - if (bits < 16) - dev->tnode_width = 16; - else - dev->tnode_width = bits; - } else { - dev->tnode_width = 16; - } - - dev->tnode_mask = (1 << dev->tnode_width) - 1; - - /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled), - * so if the bitwidth of the - * chunk range we're using is greater than 16 we need - * to figure out chunk shift and chunk_grp_size - */ - - if (bits <= dev->tnode_width) - dev->chunk_grp_bits = 0; - else - dev->chunk_grp_bits = bits - dev->tnode_width; - - dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8; - if (dev->tnode_size < sizeof(struct yaffs_tnode)) - dev->tnode_size = sizeof(struct yaffs_tnode); - - dev->chunk_grp_size = 1 << dev->chunk_grp_bits; - - if (dev->param.chunks_per_block < dev->chunk_grp_size) { - /* We have a problem because the soft delete won't work if - * the chunk group size > chunks per block. - * This can be remedied by using larger "virtual blocks". - */ - yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large"); - - return YAFFS_FAIL; - } - - /* OK, we've finished verifying the device, lets continue with initialisation */ - - /* More device initialisation */ - dev->all_gcs = 0; - dev->passive_gc_count = 0; - dev->oldest_dirty_gc_count = 0; - dev->bg_gcs = 0; - dev->gc_block_finder = 0; - dev->buffered_block = -1; - dev->doing_buffered_block_rewrite = 0; - dev->n_deleted_files = 0; - dev->n_bg_deletions = 0; - dev->n_unlinked_files = 0; - dev->n_ecc_fixed = 0; - dev->n_ecc_unfixed = 0; - dev->n_tags_ecc_fixed = 0; - dev->n_tags_ecc_unfixed = 0; - dev->n_erase_failures = 0; - dev->n_erased_blocks = 0; - dev->gc_disable = 0; - dev->has_pending_prioritised_gc = 1; /* Assume the worst for now, will get fixed on first GC */ - INIT_LIST_HEAD(&dev->dirty_dirs); - dev->oldest_dirty_seq = 0; - dev->oldest_dirty_block = 0; - - /* Initialise temporary buffers and caches. */ - if (!yaffs_init_tmp_buffers(dev)) - init_failed = 1; - - dev->cache = NULL; - dev->gc_cleanup_list = NULL; - - if (!init_failed && dev->param.n_caches > 0) { - int i; - void *buf; - int cache_bytes = - dev->param.n_caches * sizeof(struct yaffs_cache); - - if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES) - dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES; - - dev->cache = kmalloc(cache_bytes, GFP_NOFS); - - buf = (u8 *) dev->cache; - - if (dev->cache) - memset(dev->cache, 0, cache_bytes); - - for (i = 0; i < dev->param.n_caches && buf; i++) { - dev->cache[i].object = NULL; - dev->cache[i].last_use = 0; - dev->cache[i].dirty = 0; - dev->cache[i].data = buf = - kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); - } - if (!buf) - init_failed = 1; - - dev->cache_last_use = 0; - } - - dev->cache_hits = 0; - - if (!init_failed) { - dev->gc_cleanup_list = - kmalloc(dev->param.chunks_per_block * sizeof(u32), - GFP_NOFS); - if (!dev->gc_cleanup_list) - init_failed = 1; - } - - if (dev->param.is_yaffs2) - dev->param.use_header_file_size = 1; - - if (!init_failed && !yaffs_init_blocks(dev)) - init_failed = 1; - - yaffs_init_tnodes_and_objs(dev); - - if (!init_failed && !yaffs_create_initial_dir(dev)) - init_failed = 1; - - if (!init_failed) { - /* Now scan the flash. */ - if (dev->param.is_yaffs2) { - if (yaffs2_checkpt_restore(dev)) { - yaffs_check_obj_details_loaded(dev->root_dir); - yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT, - "yaffs: restored from checkpoint" - ); - } else { - - /* Clean up the mess caused by an aborted checkpoint load - * and scan backwards. - */ - yaffs_deinit_blocks(dev); - - yaffs_deinit_tnodes_and_objs(dev); - - dev->n_erased_blocks = 0; - dev->n_free_chunks = 0; - dev->alloc_block = -1; - dev->alloc_page = -1; - dev->n_deleted_files = 0; - dev->n_unlinked_files = 0; - dev->n_bg_deletions = 0; - - if (!init_failed && !yaffs_init_blocks(dev)) - init_failed = 1; - - yaffs_init_tnodes_and_objs(dev); - - if (!init_failed - && !yaffs_create_initial_dir(dev)) - init_failed = 1; - - if (!init_failed && !yaffs2_scan_backwards(dev)) - init_failed = 1; - } - } else if (!yaffs1_scan(dev)) { - init_failed = 1; - } - - yaffs_strip_deleted_objs(dev); - yaffs_fix_hanging_objs(dev); - if (dev->param.empty_lost_n_found) - yaffs_empty_l_n_f(dev); - } - - if (init_failed) { - /* Clean up the mess */ - yaffs_trace(YAFFS_TRACE_TRACING, - "yaffs: yaffs_guts_initialise() aborted."); - - yaffs_deinitialise(dev); - return YAFFS_FAIL; - } - - /* Zero out stats */ - dev->n_page_reads = 0; - dev->n_page_writes = 0; - dev->n_erasures = 0; - dev->n_gc_copies = 0; - dev->n_retired_writes = 0; - - dev->n_retired_blocks = 0; - - yaffs_verify_free_chunks(dev); - yaffs_verify_blocks(dev); - - /* Clean up any aborted checkpoint data */ - if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0) - yaffs2_checkpt_invalidate(dev); - - yaffs_trace(YAFFS_TRACE_TRACING, - "yaffs: yaffs_guts_initialise() done."); - return YAFFS_OK; - -} - -void yaffs_deinitialise(struct yaffs_dev *dev) -{ - if (dev->is_mounted) { - int i; - - yaffs_deinit_blocks(dev); - yaffs_deinit_tnodes_and_objs(dev); - if (dev->param.n_caches > 0 && dev->cache) { - - for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].data) - kfree(dev->cache[i].data); - dev->cache[i].data = NULL; - } - - kfree(dev->cache); - dev->cache = NULL; - } - - kfree(dev->gc_cleanup_list); - - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) - kfree(dev->temp_buffer[i].buffer); - - dev->is_mounted = 0; - - if (dev->param.deinitialise_flash_fn) - dev->param.deinitialise_flash_fn(dev); - } -} - -int yaffs_count_free_chunks(struct yaffs_dev *dev) -{ - int n_free = 0; - int b; - - struct yaffs_block_info *blk; - - blk = dev->block_info; - for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { - switch (blk->block_state) { - case YAFFS_BLOCK_STATE_EMPTY: - case YAFFS_BLOCK_STATE_ALLOCATING: - case YAFFS_BLOCK_STATE_COLLECTING: - case YAFFS_BLOCK_STATE_FULL: - n_free += - (dev->param.chunks_per_block - blk->pages_in_use + - blk->soft_del_pages); - break; - default: - break; - } - blk++; - } - - return n_free; -} - -int yaffs_get_n_free_chunks(struct yaffs_dev *dev) -{ - /* This is what we report to the outside world */ - - int n_free; - int n_dirty_caches; - int blocks_for_checkpt; - int i; - - n_free = dev->n_free_chunks; - n_free += dev->n_deleted_files; - - /* Now count the number of dirty chunks in the cache and subtract those */ - - for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].dirty) - n_dirty_caches++; - } - - n_free -= n_dirty_caches; - - n_free -= - ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block); - - /* Now we figure out how much to reserve for the checkpoint and report that... */ - blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev); - - n_free -= (blocks_for_checkpt * dev->param.chunks_per_block); - - if (n_free < 0) - n_free = 0; - - return n_free; - -} diff --git a/fs/yaffs2/yaffs_guts.h b/fs/yaffs2/yaffs_guts.h deleted file mode 100644 index 307eba2..0000000 --- a/fs/yaffs2/yaffs_guts.h +++ /dev/null @@ -1,915 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_GUTS_H__ -#define __YAFFS_GUTS_H__ - -#include "yportenv.h" - -#define YAFFS_OK 1 -#define YAFFS_FAIL 0 - -/* Give us a Y=0x59, - * Give us an A=0x41, - * Give us an FF=0xFF - * Give us an S=0x53 - * And what have we got... - */ -#define YAFFS_MAGIC 0x5941FF53 - -#define YAFFS_NTNODES_LEVEL0 16 -#define YAFFS_TNODES_LEVEL0_BITS 4 -#define YAFFS_TNODES_LEVEL0_MASK 0xf - -#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2) -#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1) -#define YAFFS_TNODES_INTERNAL_MASK 0x7 -#define YAFFS_TNODES_MAX_LEVEL 6 - -#ifndef CONFIG_YAFFS_NO_YAFFS1 -#define YAFFS_BYTES_PER_SPARE 16 -#define YAFFS_BYTES_PER_CHUNK 512 -#define YAFFS_CHUNK_SIZE_SHIFT 9 -#define YAFFS_CHUNKS_PER_BLOCK 32 -#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK) -#endif - -#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024 -#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32 - -#define YAFFS_MAX_CHUNK_ID 0x000FFFFF - -#define YAFFS_ALLOCATION_NOBJECTS 100 -#define YAFFS_ALLOCATION_NTNODES 100 -#define YAFFS_ALLOCATION_NLINKS 100 - -#define YAFFS_NOBJECT_BUCKETS 256 - -#define YAFFS_OBJECT_SPACE 0x40000 -#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE -1) - -#define YAFFS_CHECKPOINT_VERSION 4 - -#ifdef CONFIG_YAFFS_UNICODE -#define YAFFS_MAX_NAME_LENGTH 127 -#define YAFFS_MAX_ALIAS_LENGTH 79 -#else -#define YAFFS_MAX_NAME_LENGTH 255 -#define YAFFS_MAX_ALIAS_LENGTH 159 -#endif - -#define YAFFS_SHORT_NAME_LENGTH 15 - -/* Some special object ids for pseudo objects */ -#define YAFFS_OBJECTID_ROOT 1 -#define YAFFS_OBJECTID_LOSTNFOUND 2 -#define YAFFS_OBJECTID_UNLINKED 3 -#define YAFFS_OBJECTID_DELETED 4 - -/* Pseudo object ids for checkpointing */ -#define YAFFS_OBJECTID_SB_HEADER 0x10 -#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20 -#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21 - -#define YAFFS_MAX_SHORT_OP_CACHES 20 - -#define YAFFS_N_TEMP_BUFFERS 6 - -/* We limit the number attempts at sucessfully saving a chunk of data. - * Small-page devices have 32 pages per block; large-page devices have 64. - * Default to something in the order of 5 to 10 blocks worth of chunks. - */ -#define YAFFS_WR_ATTEMPTS (5*64) - -/* Sequence numbers are used in YAFFS2 to determine block allocation order. - * The range is limited slightly to help distinguish bad numbers from good. - * This also allows us to perhaps in the future use special numbers for - * special purposes. - * EFFFFF00 allows the allocation of 8 blocks per second (~1Mbytes) for 15 years, - * and is a larger number than the lifetime of a 2GB device. - */ -#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000 -#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00 - -/* Special sequence number for bad block that failed to be marked bad */ -#define YAFFS_SEQUENCE_BAD_BLOCK 0xFFFF0000 - -/* ChunkCache is used for short read/write operations.*/ -struct yaffs_cache { - struct yaffs_obj *object; - int chunk_id; - int last_use; - int dirty; - int n_bytes; /* Only valid if the cache is dirty */ - int locked; /* Can't push out or flush while locked. */ - u8 *data; -}; - -/* Tags structures in RAM - * NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise - * the structure size will get blown out. - */ - -#ifndef CONFIG_YAFFS_NO_YAFFS1 -struct yaffs_tags { - unsigned chunk_id:20; - unsigned serial_number:2; - unsigned n_bytes_lsb:10; - unsigned obj_id:18; - unsigned ecc:12; - unsigned n_bytes_msb:2; -}; - -union yaffs_tags_union { - struct yaffs_tags as_tags; - u8 as_bytes[8]; -}; - -#endif - -/* Stuff used for extended tags in YAFFS2 */ - -enum yaffs_ecc_result { - YAFFS_ECC_RESULT_UNKNOWN, - YAFFS_ECC_RESULT_NO_ERROR, - YAFFS_ECC_RESULT_FIXED, - YAFFS_ECC_RESULT_UNFIXED -}; - -enum yaffs_obj_type { - YAFFS_OBJECT_TYPE_UNKNOWN, - YAFFS_OBJECT_TYPE_FILE, - YAFFS_OBJECT_TYPE_SYMLINK, - YAFFS_OBJECT_TYPE_DIRECTORY, - YAFFS_OBJECT_TYPE_HARDLINK, - YAFFS_OBJECT_TYPE_SPECIAL -}; - -#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL - -struct yaffs_ext_tags { - - unsigned validity0; - unsigned chunk_used; /* Status of the chunk: used or unused */ - unsigned obj_id; /* If 0 then this is not part of an object (unused) */ - unsigned chunk_id; /* If 0 then this is a header, else a data chunk */ - unsigned n_bytes; /* Only valid for data chunks */ - - /* The following stuff only has meaning when we read */ - enum yaffs_ecc_result ecc_result; - unsigned block_bad; - - /* YAFFS 1 stuff */ - unsigned is_deleted; /* The chunk is marked deleted */ - unsigned serial_number; /* Yaffs1 2-bit serial number */ - - /* YAFFS2 stuff */ - unsigned seq_number; /* The sequence number of this block */ - - /* Extra info if this is an object header (YAFFS2 only) */ - - unsigned extra_available; /* There is extra info available if this is not zero */ - unsigned extra_parent_id; /* The parent object */ - unsigned extra_is_shrink; /* Is it a shrink header? */ - unsigned extra_shadows; /* Does this shadow another object? */ - - enum yaffs_obj_type extra_obj_type; /* What object type? */ - - unsigned extra_length; /* Length if it is a file */ - unsigned extra_equiv_id; /* Equivalent object Id if it is a hard link */ - - unsigned validity1; - -}; - -/* Spare structure for YAFFS1 */ -struct yaffs_spare { - u8 tb0; - u8 tb1; - u8 tb2; - u8 tb3; - u8 page_status; /* set to 0 to delete the chunk */ - u8 block_status; - u8 tb4; - u8 tb5; - u8 ecc1[3]; - u8 tb6; - u8 tb7; - u8 ecc2[3]; -}; - -/*Special structure for passing through to mtd */ -struct yaffs_nand_spare { - struct yaffs_spare spare; - int eccres1; - int eccres2; -}; - -/* Block data in RAM */ - -enum yaffs_block_state { - YAFFS_BLOCK_STATE_UNKNOWN = 0, - - YAFFS_BLOCK_STATE_SCANNING, - /* Being scanned */ - - YAFFS_BLOCK_STATE_NEEDS_SCANNING, - /* The block might have something on it (ie it is allocating or full, perhaps empty) - * but it needs to be scanned to determine its true state. - * This state is only valid during scanning. - * NB We tolerate empty because the pre-scanner might be incapable of deciding - * However, if this state is returned on a YAFFS2 device, then we expect a sequence number - */ - - YAFFS_BLOCK_STATE_EMPTY, - /* This block is empty */ - - YAFFS_BLOCK_STATE_ALLOCATING, - /* This block is partially allocated. - * At least one page holds valid data. - * This is the one currently being used for page - * allocation. Should never be more than one of these. - * If a block is only partially allocated at mount it is treated as full. - */ - - YAFFS_BLOCK_STATE_FULL, - /* All the pages in this block have been allocated. - * If a block was only partially allocated when mounted we treat - * it as fully allocated. - */ - - YAFFS_BLOCK_STATE_DIRTY, - /* The block was full and now all chunks have been deleted. - * Erase me, reuse me. - */ - - YAFFS_BLOCK_STATE_CHECKPOINT, - /* This block is assigned to holding checkpoint data. */ - - YAFFS_BLOCK_STATE_COLLECTING, - /* This block is being garbage collected */ - - YAFFS_BLOCK_STATE_DEAD - /* This block has failed and is not in use */ -}; - -#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1) - -struct yaffs_block_info { - - int soft_del_pages:10; /* number of soft deleted pages */ - int pages_in_use:10; /* number of pages in use */ - unsigned block_state:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */ - u32 needs_retiring:1; /* Data has failed on this block, need to get valid data off */ - /* and retire the block. */ - u32 skip_erased_check:1; /* If this is set we can skip the erased check on this block */ - u32 gc_prioritise:1; /* An ECC check or blank check has failed on this block. - It should be prioritised for GC */ - u32 chunk_error_strikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */ - -#ifdef CONFIG_YAFFS_YAFFS2 - u32 has_shrink_hdr:1; /* This block has at least one shrink object header */ - u32 seq_number; /* block sequence number for yaffs2 */ -#endif - -}; - -/* -------------------------- Object structure -------------------------------*/ -/* This is the object structure as stored on NAND */ - -struct yaffs_obj_hdr { - enum yaffs_obj_type type; - - /* Apply to everything */ - int parent_obj_id; - u16 sum_no_longer_used; /* checksum of name. No longer used */ - YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - - /* The following apply to directories, files, symlinks - not hard links */ - u32 yst_mode; /* protection */ - - u32 yst_uid; - u32 yst_gid; - u32 yst_atime; - u32 yst_mtime; - u32 yst_ctime; - - /* File size applies to files only */ - int file_size; - - /* Equivalent object id applies to hard links only. */ - int equiv_id; - - /* Alias is for symlinks only. */ - YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1]; - - u32 yst_rdev; /* device stuff for block and char devices (major/min) */ - - u32 win_ctime[2]; - u32 win_atime[2]; - u32 win_mtime[2]; - - u32 inband_shadowed_obj_id; - u32 inband_is_shrink; - - u32 reserved[2]; - int shadows_obj; /* This object header shadows the specified object if > 0 */ - - /* is_shrink applies to object headers written when we shrink the file (ie resize) */ - u32 is_shrink; - -}; - -/*--------------------------- Tnode -------------------------- */ - -struct yaffs_tnode { - struct yaffs_tnode *internal[YAFFS_NTNODES_INTERNAL]; -}; - -/*------------------------ Object -----------------------------*/ -/* An object can be one of: - * - a directory (no data, has children links - * - a regular file (data.... not prunes :->). - * - a symlink [symbolic link] (the alias). - * - a hard link - */ - -struct yaffs_file_var { - u32 file_size; - u32 scanned_size; - u32 shrink_size; - int top_level; - struct yaffs_tnode *top; -}; - -struct yaffs_dir_var { - struct list_head children; /* list of child links */ - struct list_head dirty; /* Entry for list of dirty directories */ -}; - -struct yaffs_symlink_var { - YCHAR *alias; -}; - -struct yaffs_hardlink_var { - struct yaffs_obj *equiv_obj; - u32 equiv_id; -}; - -union yaffs_obj_var { - struct yaffs_file_var file_variant; - struct yaffs_dir_var dir_variant; - struct yaffs_symlink_var symlink_variant; - struct yaffs_hardlink_var hardlink_variant; -}; - -struct yaffs_obj { - u8 deleted:1; /* This should only apply to unlinked files. */ - u8 soft_del:1; /* it has also been soft deleted */ - u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory. */ - u8 fake:1; /* A fake object has no presence on NAND. */ - u8 rename_allowed:1; /* Some objects are not allowed to be renamed. */ - u8 unlink_allowed:1; - u8 dirty:1; /* the object needs to be written to flash */ - u8 valid:1; /* When the file system is being loaded up, this - * object might be created before the data - * is available (ie. file data records appear before the header). - */ - u8 lazy_loaded:1; /* This object has been lazy loaded and is missing some detail */ - - u8 defered_free:1; /* For Linux kernel. Object is removed from NAND, but is - * still in the inode cache. Free of object is defered. - * until the inode is released. - */ - u8 being_created:1; /* This object is still being created so skip some checks. */ - u8 is_shadowed:1; /* This object is shadowed on the way to being renamed. */ - - u8 xattr_known:1; /* We know if this has object has xattribs or not. */ - u8 has_xattr:1; /* This object has xattribs. Valid if xattr_known. */ - - u8 serial; /* serial number of chunk in NAND. Cached here */ - u16 sum; /* sum of the name to speed searching */ - - struct yaffs_dev *my_dev; /* The device I'm on */ - - struct list_head hash_link; /* list of objects in this hash bucket */ - - struct list_head hard_links; /* all the equivalent hard linked objects */ - - /* directory structure stuff */ - /* also used for linking up the free list */ - struct yaffs_obj *parent; - struct list_head siblings; - - /* Where's my object header in NAND? */ - int hdr_chunk; - - int n_data_chunks; /* Number of data chunks attached to the file. */ - - u32 obj_id; /* the object id value */ - - u32 yst_mode; - -#ifndef CONFIG_YAFFS_NO_SHORT_NAMES - YCHAR short_name[YAFFS_SHORT_NAME_LENGTH + 1]; -#endif - -#ifdef CONFIG_YAFFS_WINCE - u32 win_ctime[2]; - u32 win_mtime[2]; - u32 win_atime[2]; -#else - u32 yst_uid; - u32 yst_gid; - u32 yst_atime; - u32 yst_mtime; - u32 yst_ctime; -#endif - - u32 yst_rdev; - - void *my_inode; - - enum yaffs_obj_type variant_type; - - union yaffs_obj_var variant; - -}; - -struct yaffs_obj_bucket { - struct list_head list; - int count; -}; - -/* yaffs_checkpt_obj holds the definition of an object as dumped - * by checkpointing. - */ - -struct yaffs_checkpt_obj { - int struct_type; - u32 obj_id; - u32 parent_id; - int hdr_chunk; - enum yaffs_obj_type variant_type:3; - u8 deleted:1; - u8 soft_del:1; - u8 unlinked:1; - u8 fake:1; - u8 rename_allowed:1; - u8 unlink_allowed:1; - u8 serial; - int n_data_chunks; - u32 size_or_equiv_obj; -}; - -/*--------------------- Temporary buffers ---------------- - * - * These are chunk-sized working buffers. Each device has a few - */ - -struct yaffs_buffer { - u8 *buffer; - int line; /* track from whence this buffer was allocated */ - int max_line; -}; - -/*----------------- Device ---------------------------------*/ - -struct yaffs_param { - const YCHAR *name; - - /* - * Entry parameters set up way early. Yaffs sets up the rest. - * The structure should be zeroed out before use so that unused - * and defualt values are zero. - */ - - int inband_tags; /* Use unband tags */ - u32 total_bytes_per_chunk; /* Should be >= 512, does not need to be a power of 2 */ - int chunks_per_block; /* does not need to be a power of 2 */ - int spare_bytes_per_chunk; /* spare area size */ - int start_block; /* Start block we're allowed to use */ - int end_block; /* End block we're allowed to use */ - int n_reserved_blocks; /* We want this tuneable so that we can reduce */ - /* reserved blocks on NOR and RAM. */ - - int n_caches; /* If <= 0, then short op caching is disabled, else - * the number of short op caches (don't use too many). - * 10 to 20 is a good bet. - */ - int use_nand_ecc; /* Flag to decide whether or not to use NANDECC on data (yaffs1) */ - int no_tags_ecc; /* Flag to decide whether or not to do ECC on packed tags (yaffs2) */ - - int is_yaffs2; /* Use yaffs2 mode on this device */ - - int empty_lost_n_found; /* Auto-empty lost+found directory on mount */ - - int refresh_period; /* How often we should check to do a block refresh */ - - /* Checkpoint control. Can be set before or after initialisation */ - u8 skip_checkpt_rd; - u8 skip_checkpt_wr; - - int enable_xattr; /* Enable xattribs */ - - /* NAND access functions (Must be set before calling YAFFS) */ - - int (*write_chunk_fn) (struct yaffs_dev * dev, - int nand_chunk, const u8 * data, - const struct yaffs_spare * spare); - int (*read_chunk_fn) (struct yaffs_dev * dev, - int nand_chunk, u8 * data, - struct yaffs_spare * spare); - int (*erase_fn) (struct yaffs_dev * dev, int flash_block); - int (*initialise_flash_fn) (struct yaffs_dev * dev); - int (*deinitialise_flash_fn) (struct yaffs_dev * dev); - -#ifdef CONFIG_YAFFS_YAFFS2 - int (*write_chunk_tags_fn) (struct yaffs_dev * dev, - int nand_chunk, const u8 * data, - const struct yaffs_ext_tags * tags); - int (*read_chunk_tags_fn) (struct yaffs_dev * dev, - int nand_chunk, u8 * data, - struct yaffs_ext_tags * tags); - int (*bad_block_fn) (struct yaffs_dev * dev, int block_no); - int (*query_block_fn) (struct yaffs_dev * dev, int block_no, - enum yaffs_block_state * state, - u32 * seq_number); -#endif - - /* The remove_obj_fn function must be supplied by OS flavours that - * need it. - * yaffs direct uses it to implement the faster readdir. - * Linux uses it to protect the directory during unlocking. - */ - void (*remove_obj_fn) (struct yaffs_obj * obj); - - /* Callback to mark the superblock dirty */ - void (*sb_dirty_fn) (struct yaffs_dev * dev); - - /* Callback to control garbage collection. */ - unsigned (*gc_control) (struct yaffs_dev * dev); - - /* Debug control flags. Don't use unless you know what you're doing */ - int use_header_file_size; /* Flag to determine if we should use file sizes from the header */ - int disable_lazy_load; /* Disable lazy loading on this device */ - int wide_tnodes_disabled; /* Set to disable wide tnodes */ - int disable_soft_del; /* yaffs 1 only: Set to disable the use of softdeletion. */ - - int defered_dir_update; /* Set to defer directory updates */ - -#ifdef CONFIG_YAFFS_AUTO_UNICODE - int auto_unicode; -#endif - int always_check_erased; /* Force chunk erased check always on */ -}; - -struct yaffs_dev { - struct yaffs_param param; - - /* Context storage. Holds extra OS specific data for this device */ - - void *os_context; - void *driver_context; - - struct list_head dev_list; - - /* Runtime parameters. Set up by YAFFS. */ - int data_bytes_per_chunk; - - /* Non-wide tnode stuff */ - u16 chunk_grp_bits; /* Number of bits that need to be resolved if - * the tnodes are not wide enough. - */ - u16 chunk_grp_size; /* == 2^^chunk_grp_bits */ - - /* Stuff to support wide tnodes */ - u32 tnode_width; - u32 tnode_mask; - u32 tnode_size; - - /* Stuff for figuring out file offset to chunk conversions */ - u32 chunk_shift; /* Shift value */ - u32 chunk_div; /* Divisor after shifting: 1 for power-of-2 sizes */ - u32 chunk_mask; /* Mask to use for power-of-2 case */ - - int is_mounted; - int read_only; - int is_checkpointed; - - /* Stuff to support block offsetting to support start block zero */ - int internal_start_block; - int internal_end_block; - int block_offset; - int chunk_offset; - - /* Runtime checkpointing stuff */ - int checkpt_page_seq; /* running sequence number of checkpoint pages */ - int checkpt_byte_count; - int checkpt_byte_offs; - u8 *checkpt_buffer; - int checkpt_open_write; - int blocks_in_checkpt; - int checkpt_cur_chunk; - int checkpt_cur_block; - int checkpt_next_block; - int *checkpt_block_list; - int checkpt_max_blocks; - u32 checkpt_sum; - u32 checkpt_xor; - - int checkpoint_blocks_required; /* Number of blocks needed to store current checkpoint set */ - - /* Block Info */ - struct yaffs_block_info *block_info; - u8 *chunk_bits; /* bitmap of chunks in use */ - unsigned block_info_alt:1; /* was allocated using alternative strategy */ - unsigned chunk_bits_alt:1; /* was allocated using alternative strategy */ - int chunk_bit_stride; /* Number of bytes of chunk_bits per block. - * Must be consistent with chunks_per_block. - */ - - int n_erased_blocks; - int alloc_block; /* Current block being allocated off */ - u32 alloc_page; - int alloc_block_finder; /* Used to search for next allocation block */ - - /* Object and Tnode memory management */ - void *allocator; - int n_obj; - int n_tnodes; - - int n_hardlinks; - - struct yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS]; - u32 bucket_finder; - - int n_free_chunks; - - /* Garbage collection control */ - u32 *gc_cleanup_list; /* objects to delete at the end of a GC. */ - u32 n_clean_ups; - - unsigned has_pending_prioritised_gc; /* We think this device might have pending prioritised gcs */ - unsigned gc_disable; - unsigned gc_block_finder; - unsigned gc_dirtiest; - unsigned gc_pages_in_use; - unsigned gc_not_done; - unsigned gc_block; - unsigned gc_chunk; - unsigned gc_skip; - - /* Special directories */ - struct yaffs_obj *root_dir; - struct yaffs_obj *lost_n_found; - - /* Buffer areas for storing data to recover from write failures TODO - * u8 buffered_data[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK]; - * struct yaffs_spare buffered_spare[YAFFS_CHUNKS_PER_BLOCK]; - */ - - int buffered_block; /* Which block is buffered here? */ - int doing_buffered_block_rewrite; - - struct yaffs_cache *cache; - int cache_last_use; - - /* Stuff for background deletion and unlinked files. */ - struct yaffs_obj *unlinked_dir; /* Directory where unlinked and deleted files live. */ - struct yaffs_obj *del_dir; /* Directory where deleted objects are sent to disappear. */ - struct yaffs_obj *unlinked_deletion; /* Current file being background deleted. */ - int n_deleted_files; /* Count of files awaiting deletion; */ - int n_unlinked_files; /* Count of unlinked files. */ - int n_bg_deletions; /* Count of background deletions. */ - - /* Temporary buffer management */ - struct yaffs_buffer temp_buffer[YAFFS_N_TEMP_BUFFERS]; - int max_temp; - int temp_in_use; - int unmanaged_buffer_allocs; - int unmanaged_buffer_deallocs; - - /* yaffs2 runtime stuff */ - unsigned seq_number; /* Sequence number of currently allocating block */ - unsigned oldest_dirty_seq; - unsigned oldest_dirty_block; - - /* Block refreshing */ - int refresh_skip; /* A skip down counter. Refresh happens when this gets to zero. */ - - /* Dirty directory handling */ - struct list_head dirty_dirs; /* List of dirty directories */ - - /* Statistcs */ - u32 n_page_writes; - u32 n_page_reads; - u32 n_erasures; - u32 n_erase_failures; - u32 n_gc_copies; - u32 all_gcs; - u32 passive_gc_count; - u32 oldest_dirty_gc_count; - u32 n_gc_blocks; - u32 bg_gcs; - u32 n_retired_writes; - u32 n_retired_blocks; - u32 n_ecc_fixed; - u32 n_ecc_unfixed; - u32 n_tags_ecc_fixed; - u32 n_tags_ecc_unfixed; - u32 n_deletions; - u32 n_unmarked_deletions; - u32 refresh_count; - u32 cache_hits; - -}; - -/* The CheckpointDevice structure holds the device information that changes at runtime and - * must be preserved over unmount/mount cycles. - */ -struct yaffs_checkpt_dev { - int struct_type; - int n_erased_blocks; - int alloc_block; /* Current block being allocated off */ - u32 alloc_page; - int n_free_chunks; - - int n_deleted_files; /* Count of files awaiting deletion; */ - int n_unlinked_files; /* Count of unlinked files. */ - int n_bg_deletions; /* Count of background deletions. */ - - /* yaffs2 runtime stuff */ - unsigned seq_number; /* Sequence number of currently allocating block */ - -}; - -struct yaffs_checkpt_validity { - int struct_type; - u32 magic; - u32 version; - u32 head; -}; - -struct yaffs_shadow_fixer { - int obj_id; - int shadowed_id; - struct yaffs_shadow_fixer *next; -}; - -/* Structure for doing xattr modifications */ -struct yaffs_xattr_mod { - int set; /* If 0 then this is a deletion */ - const YCHAR *name; - const void *data; - int size; - int flags; - int result; -}; - -/*----------------------- YAFFS Functions -----------------------*/ - -int yaffs_guts_initialise(struct yaffs_dev *dev); -void yaffs_deinitialise(struct yaffs_dev *dev); - -int yaffs_get_n_free_chunks(struct yaffs_dev *dev); - -int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name, - struct yaffs_obj *new_dir, const YCHAR * new_name); - -int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name); -int yaffs_del_obj(struct yaffs_obj *obj); - -int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size); -int yaffs_get_obj_length(struct yaffs_obj *obj); -int yaffs_get_obj_inode(struct yaffs_obj *obj); -unsigned yaffs_get_obj_type(struct yaffs_obj *obj); -int yaffs_get_obj_link_count(struct yaffs_obj *obj); - -/* File operations */ -int yaffs_file_rd(struct yaffs_obj *obj, u8 * buffer, loff_t offset, - int n_bytes); -int yaffs_wr_file(struct yaffs_obj *obj, const u8 * buffer, loff_t offset, - int n_bytes, int write_trhrough); -int yaffs_resize_file(struct yaffs_obj *obj, loff_t new_size); - -struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, - const YCHAR * name, u32 mode, u32 uid, - u32 gid); - -int yaffs_flush_file(struct yaffs_obj *obj, int update_time, int data_sync); - -/* Flushing and checkpointing */ -void yaffs_flush_whole_cache(struct yaffs_dev *dev); - -int yaffs_checkpoint_save(struct yaffs_dev *dev); -int yaffs_checkpoint_restore(struct yaffs_dev *dev); - -/* Directory operations */ -struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR * name, - u32 mode, u32 uid, u32 gid); -struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *the_dir, - const YCHAR * name); -struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number); - -/* Link operations */ -struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name, - struct yaffs_obj *equiv_obj); - -struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj); - -/* Symlink operations */ -struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent, - const YCHAR * name, u32 mode, u32 uid, - u32 gid, const YCHAR * alias); -YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj); - -/* Special inodes (fifos, sockets and devices) */ -struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent, - const YCHAR * name, u32 mode, u32 uid, - u32 gid, u32 rdev); - -int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name, - const void *value, int size, int flags); -int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value, - int size); -int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size); -int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name); - -/* Special directories */ -struct yaffs_obj *yaffs_root(struct yaffs_dev *dev); -struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev); - -void yaffs_handle_defered_free(struct yaffs_obj *obj); - -void yaffs_update_dirty_dirs(struct yaffs_dev *dev); - -int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency); - -/* Debug dump */ -int yaffs_dump_obj(struct yaffs_obj *obj); - -void yaffs_guts_test(struct yaffs_dev *dev); - -/* A few useful functions to be used within the core files*/ -void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, - int lyn); -int yaffs_check_ff(u8 * buffer, int n_bytes); -void yaffs_handle_chunk_error(struct yaffs_dev *dev, - struct yaffs_block_info *bi); - -u8 *yaffs_get_temp_buffer(struct yaffs_dev *dev, int line_no); -void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 * buffer, int line_no); - -struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, - int number, - enum yaffs_obj_type type); -int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk, - int nand_chunk, int in_scan); -void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name); -void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, - const struct yaffs_obj_hdr *oh); -void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj); -YCHAR *yaffs_clone_str(const YCHAR * str); -void yaffs_link_fixup(struct yaffs_dev *dev, struct yaffs_obj *hard_list); -void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no); -int yaffs_update_oh(struct yaffs_obj *in, const YCHAR * name, - int force, int is_shrink, int shadows, - struct yaffs_xattr_mod *xop); -void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, - int backward_scanning); -int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks); -struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev); -struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, - struct yaffs_file_var *file_struct, - u32 chunk_id, - struct yaffs_tnode *passed_tn); - -int yaffs_do_file_wr(struct yaffs_obj *in, const u8 * buffer, loff_t offset, - int n_bytes, int write_trhrough); -void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size); -void yaffs_skip_rest_of_block(struct yaffs_dev *dev); - -int yaffs_count_free_chunks(struct yaffs_dev *dev); - -struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, - struct yaffs_file_var *file_struct, - u32 chunk_id); - -u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, - unsigned pos); - -int yaffs_is_non_empty_dir(struct yaffs_obj *obj); -#endif diff --git a/fs/yaffs2/yaffs_linux.h b/fs/yaffs2/yaffs_linux.h deleted file mode 100644 index 3b508cb..0000000 --- a/fs/yaffs2/yaffs_linux.h +++ /dev/null @@ -1,41 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_LINUX_H__ -#define __YAFFS_LINUX_H__ - -#include "yportenv.h" - -struct yaffs_linux_context { - struct list_head context_list; /* List of these we have mounted */ - struct yaffs_dev *dev; - struct super_block *super; - struct task_struct *bg_thread; /* Background thread for this device */ - int bg_running; - struct mutex gross_lock; /* Gross locking mutex*/ - u8 *spare_buffer; /* For mtdif2 use. Don't know the size of the buffer - * at compile time so we have to allocate it. - */ - struct list_head search_contexts; - void (*put_super_fn) (struct super_block * sb); - - struct task_struct *readdir_process; - unsigned mount_id; -}; - -#define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context)) -#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context)) - -#endif diff --git a/fs/yaffs2/yaffs_mtdif.c b/fs/yaffs2/yaffs_mtdif.c deleted file mode 100644 index 7cf53b3..0000000 --- a/fs/yaffs2/yaffs_mtdif.c +++ /dev/null @@ -1,54 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yportenv.h" - -#include "yaffs_mtdif.h" - -#include "linux/mtd/mtd.h" -#include "linux/types.h" -#include "linux/time.h" -#include "linux/mtd/nand.h" - -#include "yaffs_linux.h" - -int nandmtd_erase_block(struct yaffs_dev *dev, int block_no) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - u32 addr = - ((loff_t) block_no) * dev->param.total_bytes_per_chunk - * dev->param.chunks_per_block; - struct erase_info ei; - - int retval = 0; - - ei.mtd = mtd; - ei.addr = addr; - ei.len = dev->param.total_bytes_per_chunk * dev->param.chunks_per_block; - ei.time = 1000; - ei.retries = 2; - ei.callback = NULL; - ei.priv = (u_long) dev; - - retval = mtd->erase(mtd, &ei); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd_initialise(struct yaffs_dev *dev) -{ - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_mtdif.h b/fs/yaffs2/yaffs_mtdif.h deleted file mode 100644 index 6665074..0000000 --- a/fs/yaffs2/yaffs_mtdif.h +++ /dev/null @@ -1,23 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_MTDIF_H__ -#define __YAFFS_MTDIF_H__ - -#include "yaffs_guts.h" - -int nandmtd_erase_block(struct yaffs_dev *dev, int block_no); -int nandmtd_initialise(struct yaffs_dev *dev); -#endif diff --git a/fs/yaffs2/yaffs_mtdif1.c b/fs/yaffs2/yaffs_mtdif1.c deleted file mode 100644 index 5108369..0000000 --- a/fs/yaffs2/yaffs_mtdif1.c +++ /dev/null @@ -1,330 +0,0 @@ -/* - * YAFFS: Yet another FFS. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * This module provides the interface between yaffs_nand.c and the - * MTD API. This version is used when the MTD interface supports the - * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17, - * and we have small-page NAND device. - * - * These functions are invoked via function pointers in yaffs_nand.c. - * This replaces functionality provided by functions in yaffs_mtdif.c - * and the yaffs_tags compatability functions in yaffs_tagscompat.c that are - * called in yaffs_mtdif.c when the function pointers are NULL. - * We assume the MTD layer is performing ECC (use_nand_ecc is true). - */ - -#include "yportenv.h" -#include "yaffs_trace.h" -#include "yaffs_guts.h" -#include "yaffs_packedtags1.h" -#include "yaffs_tagscompat.h" /* for yaffs_calc_tags_ecc */ -#include "yaffs_linux.h" - -#include "linux/kernel.h" -#include "linux/version.h" -#include "linux/types.h" -#include "linux/mtd/mtd.h" - -#ifndef CONFIG_YAFFS_9BYTE_TAGS -# define YTAG1_SIZE 8 -#else -# define YTAG1_SIZE 9 -#endif - -/* Write a chunk (page) of data to NAND. - * - * Caller always provides ExtendedTags data which are converted to a more - * compact (packed) form for storage in NAND. A mini-ECC runs over the - * contents of the tags meta-data; used to valid the tags when read. - * - * - Pack ExtendedTags to packed_tags1 form - * - Compute mini-ECC for packed_tags1 - * - Write data and packed tags to NAND. - * - * Note: Due to the use of the packed_tags1 meta-data which does not include - * a full sequence number (as found in the larger packed_tags2 form) it is - * necessary for Yaffs to re-write a chunk/page (just once) to mark it as - * discarded and dirty. This is not ideal: newer NAND parts are supposed - * to be written just once. When Yaffs performs this operation, this - * function is called with a NULL data pointer -- calling MTD write_oob - * without data is valid usage (2.6.17). - * - * Any underlying MTD error results in YAFFS_FAIL. - * Returns YAFFS_OK or YAFFS_FAIL. - */ -int nandmtd1_write_chunk_tags(struct yaffs_dev *dev, - int nand_chunk, const u8 * data, - const struct yaffs_ext_tags *etags) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - int chunk_bytes = dev->data_bytes_per_chunk; - loff_t addr = ((loff_t) nand_chunk) * chunk_bytes; - struct mtd_oob_ops ops; - struct yaffs_packed_tags1 pt1; - int retval; - - /* we assume that packed_tags1 and struct yaffs_tags are compatible */ - compile_time_assertion(sizeof(struct yaffs_packed_tags1) == 12); - compile_time_assertion(sizeof(struct yaffs_tags) == 8); - - yaffs_pack_tags1(&pt1, etags); - yaffs_calc_tags_ecc((struct yaffs_tags *)&pt1); - - /* When deleting a chunk, the upper layer provides only skeletal - * etags, one with is_deleted set. However, we need to update the - * tags, not erase them completely. So we use the NAND write property - * that only zeroed-bits stick and set tag bytes to all-ones and - * zero just the (not) deleted bit. - */ -#ifndef CONFIG_YAFFS_9BYTE_TAGS - if (etags->is_deleted) { - memset(&pt1, 0xff, 8); - /* clear delete status bit to indicate deleted */ - pt1.deleted = 0; - } -#else - ((u8 *) & pt1)[8] = 0xff; - if (etags->is_deleted) { - memset(&pt1, 0xff, 8); - /* zero page_status byte to indicate deleted */ - ((u8 *) & pt1)[8] = 0; - } -#endif - - memset(&ops, 0, sizeof(ops)); - ops.mode = MTD_OOB_AUTO; - ops.len = (data) ? chunk_bytes : 0; - ops.ooblen = YTAG1_SIZE; - ops.datbuf = (u8 *) data; - ops.oobbuf = (u8 *) & pt1; - - retval = mtd->write_oob(mtd, addr, &ops); - if (retval) { - yaffs_trace(YAFFS_TRACE_MTD, - "write_oob failed, chunk %d, mtd error %d", - nand_chunk, retval); - } - return retval ? YAFFS_FAIL : YAFFS_OK; -} - -/* Return with empty ExtendedTags but add ecc_result. - */ -static int rettags(struct yaffs_ext_tags *etags, int ecc_result, int retval) -{ - if (etags) { - memset(etags, 0, sizeof(*etags)); - etags->ecc_result = ecc_result; - } - return retval; -} - -/* Read a chunk (page) from NAND. - * - * Caller expects ExtendedTags data to be usable even on error; that is, - * all members except ecc_result and block_bad are zeroed. - * - * - Check ECC results for data (if applicable) - * - Check for blank/erased block (return empty ExtendedTags if blank) - * - Check the packed_tags1 mini-ECC (correct if necessary/possible) - * - Convert packed_tags1 to ExtendedTags - * - Update ecc_result and block_bad members to refect state. - * - * Returns YAFFS_OK or YAFFS_FAIL. - */ -int nandmtd1_read_chunk_tags(struct yaffs_dev *dev, - int nand_chunk, u8 * data, - struct yaffs_ext_tags *etags) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - int chunk_bytes = dev->data_bytes_per_chunk; - loff_t addr = ((loff_t) nand_chunk) * chunk_bytes; - int eccres = YAFFS_ECC_RESULT_NO_ERROR; - struct mtd_oob_ops ops; - struct yaffs_packed_tags1 pt1; - int retval; - int deleted; - - memset(&ops, 0, sizeof(ops)); - ops.mode = MTD_OOB_AUTO; - ops.len = (data) ? chunk_bytes : 0; - ops.ooblen = YTAG1_SIZE; - ops.datbuf = data; - ops.oobbuf = (u8 *) & pt1; - - /* Read page and oob using MTD. - * Check status and determine ECC result. - */ - retval = mtd->read_oob(mtd, addr, &ops); - if (retval) { - yaffs_trace(YAFFS_TRACE_MTD, - "read_oob failed, chunk %d, mtd error %d", - nand_chunk, retval); - } - - switch (retval) { - case 0: - /* no error */ - break; - - case -EUCLEAN: - /* MTD's ECC fixed the data */ - eccres = YAFFS_ECC_RESULT_FIXED; - dev->n_ecc_fixed++; - break; - - case -EBADMSG: - /* MTD's ECC could not fix the data */ - dev->n_ecc_unfixed++; - /* fall into... */ - default: - rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0); - etags->block_bad = (mtd->block_isbad) (mtd, addr); - return YAFFS_FAIL; - } - - /* Check for a blank/erased chunk. - */ - if (yaffs_check_ff((u8 *) & pt1, 8)) { - /* when blank, upper layers want ecc_result to be <= NO_ERROR */ - return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK); - } -#ifndef CONFIG_YAFFS_9BYTE_TAGS - /* Read deleted status (bit) then return it to it's non-deleted - * state before performing tags mini-ECC check. pt1.deleted is - * inverted. - */ - deleted = !pt1.deleted; - pt1.deleted = 1; -#else - deleted = (yaffs_count_bits(((u8 *) & pt1)[8]) < 7); -#endif - - /* Check the packed tags mini-ECC and correct if necessary/possible. - */ - retval = yaffs_check_tags_ecc((struct yaffs_tags *)&pt1); - switch (retval) { - case 0: - /* no tags error, use MTD result */ - break; - case 1: - /* recovered tags-ECC error */ - dev->n_tags_ecc_fixed++; - if (eccres == YAFFS_ECC_RESULT_NO_ERROR) - eccres = YAFFS_ECC_RESULT_FIXED; - break; - default: - /* unrecovered tags-ECC error */ - dev->n_tags_ecc_unfixed++; - return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL); - } - - /* Unpack the tags to extended form and set ECC result. - * [set should_be_ff just to keep yaffs_unpack_tags1 happy] - */ - pt1.should_be_ff = 0xFFFFFFFF; - yaffs_unpack_tags1(etags, &pt1); - etags->ecc_result = eccres; - - /* Set deleted state */ - etags->is_deleted = deleted; - return YAFFS_OK; -} - -/* Mark a block bad. - * - * This is a persistant state. - * Use of this function should be rare. - * - * Returns YAFFS_OK or YAFFS_FAIL. - */ -int nandmtd1_mark_block_bad(struct yaffs_dev *dev, int block_no) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - int blocksize = dev->param.chunks_per_block * dev->data_bytes_per_chunk; - int retval; - - yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, - "marking block %d bad", block_no); - - retval = mtd->block_markbad(mtd, (loff_t) blocksize * block_no); - return (retval) ? YAFFS_FAIL : YAFFS_OK; -} - -/* Check any MTD prerequists. - * - * Returns YAFFS_OK or YAFFS_FAIL. - */ -static int nandmtd1_test_prerequists(struct mtd_info *mtd) -{ - /* 2.6.18 has mtd->ecclayout->oobavail */ - /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */ - int oobavail = mtd->ecclayout->oobavail; - - if (oobavail < YTAG1_SIZE) { - yaffs_trace(YAFFS_TRACE_ERROR, - "mtd device has only %d bytes for tags, need %d", - oobavail, YTAG1_SIZE); - return YAFFS_FAIL; - } - return YAFFS_OK; -} - -/* Query for the current state of a specific block. - * - * Examine the tags of the first chunk of the block and return the state: - * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad - * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use - * - YAFFS_BLOCK_STATE_EMPTY, the block is clean - * - * Always returns YAFFS_OK. - */ -int nandmtd1_query_block(struct yaffs_dev *dev, int block_no, - enum yaffs_block_state *state_ptr, u32 * seq_ptr) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - int chunk_num = block_no * dev->param.chunks_per_block; - loff_t addr = (loff_t) chunk_num * dev->data_bytes_per_chunk; - struct yaffs_ext_tags etags; - int state = YAFFS_BLOCK_STATE_DEAD; - int seqnum = 0; - int retval; - - /* We don't yet have a good place to test for MTD config prerequists. - * Do it here as we are called during the initial scan. - */ - if (nandmtd1_test_prerequists(mtd) != YAFFS_OK) - return YAFFS_FAIL; - - retval = nandmtd1_read_chunk_tags(dev, chunk_num, NULL, &etags); - etags.block_bad = (mtd->block_isbad) (mtd, addr); - if (etags.block_bad) { - yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, - "block %d is marked bad", block_no); - state = YAFFS_BLOCK_STATE_DEAD; - } else if (etags.ecc_result != YAFFS_ECC_RESULT_NO_ERROR) { - /* bad tags, need to look more closely */ - state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; - } else if (etags.chunk_used) { - state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; - seqnum = etags.seq_number; - } else { - state = YAFFS_BLOCK_STATE_EMPTY; - } - - *state_ptr = state; - *seq_ptr = seqnum; - - /* query always succeeds */ - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_mtdif1.h b/fs/yaffs2/yaffs_mtdif1.h deleted file mode 100644 index 07ce452..0000000 --- a/fs/yaffs2/yaffs_mtdif1.h +++ /dev/null @@ -1,29 +0,0 @@ -/* - * YAFFS: Yet another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_MTDIF1_H__ -#define __YAFFS_MTDIF1_H__ - -int nandmtd1_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk, - const u8 * data, - const struct yaffs_ext_tags *tags); - -int nandmtd1_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk, - u8 * data, struct yaffs_ext_tags *tags); - -int nandmtd1_mark_block_bad(struct yaffs_dev *dev, int block_no); - -int nandmtd1_query_block(struct yaffs_dev *dev, int block_no, - enum yaffs_block_state *state, u32 * seq_number); - -#endif diff --git a/fs/yaffs2/yaffs_mtdif2.c b/fs/yaffs2/yaffs_mtdif2.c deleted file mode 100644 index d1643df..0000000 --- a/fs/yaffs2/yaffs_mtdif2.c +++ /dev/null @@ -1,225 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* mtd interface for YAFFS2 */ - -#include "yportenv.h" -#include "yaffs_trace.h" - -#include "yaffs_mtdif2.h" - -#include "linux/mtd/mtd.h" -#include "linux/types.h" -#include "linux/time.h" - -#include "yaffs_packedtags2.h" - -#include "yaffs_linux.h" - -/* NB For use with inband tags.... - * We assume that the data buffer is of size total_bytes_per_chunk so that we can also - * use it to load the tags. - */ -int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk, - const u8 * data, - const struct yaffs_ext_tags *tags) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - struct mtd_oob_ops ops; - int retval = 0; - - loff_t addr; - - struct yaffs_packed_tags2 pt; - - int packed_tags_size = - dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); - void *packed_tags_ptr = - dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; - - yaffs_trace(YAFFS_TRACE_MTD, - "nandmtd2_write_chunk_tags chunk %d data %p tags %p", - nand_chunk, data, tags); - - addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; - - /* For yaffs2 writing there must be both data and tags. - * If we're using inband tags, then the tags are stuffed into - * the end of the data buffer. - */ - if (!data || !tags) - BUG(); - else if (dev->param.inband_tags) { - struct yaffs_packed_tags2_tags_only *pt2tp; - pt2tp = - (struct yaffs_packed_tags2_tags_only *)(data + - dev-> - data_bytes_per_chunk); - yaffs_pack_tags2_tags_only(pt2tp, tags); - } else { - yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc); - } - - ops.mode = MTD_OOB_AUTO; - ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size; - ops.len = dev->param.total_bytes_per_chunk; - ops.ooboffs = 0; - ops.datbuf = (u8 *) data; - ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr; - retval = mtd->write_oob(mtd, addr, &ops); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk, - u8 * data, struct yaffs_ext_tags *tags) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - struct mtd_oob_ops ops; - - size_t dummy; - int retval = 0; - int local_data = 0; - - loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; - - struct yaffs_packed_tags2 pt; - - int packed_tags_size = - dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); - void *packed_tags_ptr = - dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; - - yaffs_trace(YAFFS_TRACE_MTD, - "nandmtd2_read_chunk_tags chunk %d data %p tags %p", - nand_chunk, data, tags); - - if (dev->param.inband_tags) { - - if (!data) { - local_data = 1; - data = yaffs_get_temp_buffer(dev, __LINE__); - } - - } - - if (dev->param.inband_tags || (data && !tags)) - retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk, - &dummy, data); - else if (tags) { - ops.mode = MTD_OOB_AUTO; - ops.ooblen = packed_tags_size; - ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size; - ops.ooboffs = 0; - ops.datbuf = data; - ops.oobbuf = yaffs_dev_to_lc(dev)->spare_buffer; - retval = mtd->read_oob(mtd, addr, &ops); - } - - if (dev->param.inband_tags) { - if (tags) { - struct yaffs_packed_tags2_tags_only *pt2tp; - pt2tp = - (struct yaffs_packed_tags2_tags_only *)&data[dev-> - data_bytes_per_chunk]; - yaffs_unpack_tags2_tags_only(tags, pt2tp); - } - } else { - if (tags) { - memcpy(packed_tags_ptr, - yaffs_dev_to_lc(dev)->spare_buffer, - packed_tags_size); - yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc); - } - } - - if (local_data) - yaffs_release_temp_buffer(dev, data, __LINE__); - - if (tags && retval == -EBADMSG - && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { - tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED; - dev->n_ecc_unfixed++; - } - if (tags && retval == -EUCLEAN - && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { - tags->ecc_result = YAFFS_ECC_RESULT_FIXED; - dev->n_ecc_fixed++; - } - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd2_mark_block_bad(struct yaffs_dev *dev, int block_no) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - int retval; - yaffs_trace(YAFFS_TRACE_MTD, - "nandmtd2_mark_block_bad %d", block_no); - - retval = - mtd->block_markbad(mtd, - block_no * dev->param.chunks_per_block * - dev->param.total_bytes_per_chunk); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; - -} - -int nandmtd2_query_block(struct yaffs_dev *dev, int block_no, - enum yaffs_block_state *state, u32 * seq_number) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - int retval; - - yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_query_block %d", block_no); - retval = - mtd->block_isbad(mtd, - block_no * dev->param.chunks_per_block * - dev->param.total_bytes_per_chunk); - - if (retval) { - yaffs_trace(YAFFS_TRACE_MTD, "block is bad"); - - *state = YAFFS_BLOCK_STATE_DEAD; - *seq_number = 0; - } else { - struct yaffs_ext_tags t; - nandmtd2_read_chunk_tags(dev, block_no * - dev->param.chunks_per_block, NULL, &t); - - if (t.chunk_used) { - *seq_number = t.seq_number; - *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; - } else { - *seq_number = 0; - *state = YAFFS_BLOCK_STATE_EMPTY; - } - } - yaffs_trace(YAFFS_TRACE_MTD, - "block is bad seq %d state %d", *seq_number, *state); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - diff --git a/fs/yaffs2/yaffs_mtdif2.h b/fs/yaffs2/yaffs_mtdif2.h deleted file mode 100644 index d821126..0000000 --- a/fs/yaffs2/yaffs_mtdif2.h +++ /dev/null @@ -1,29 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_MTDIF2_H__ -#define __YAFFS_MTDIF2_H__ - -#include "yaffs_guts.h" -int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk, - const u8 * data, - const struct yaffs_ext_tags *tags); -int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk, - u8 * data, struct yaffs_ext_tags *tags); -int nandmtd2_mark_block_bad(struct yaffs_dev *dev, int block_no); -int nandmtd2_query_block(struct yaffs_dev *dev, int block_no, - enum yaffs_block_state *state, u32 * seq_number); - -#endif diff --git a/fs/yaffs2/yaffs_nameval.c b/fs/yaffs2/yaffs_nameval.c deleted file mode 100644 index daa36f9..0000000 --- a/fs/yaffs2/yaffs_nameval.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * This simple implementation of a name-value store assumes a small number of values and fits - * into a small finite buffer. - * - * Each attribute is stored as a record: - * sizeof(int) bytes record size. - * strnlen+1 bytes name null terminated. - * nbytes value. - * ---------- - * total size stored in record size - * - * This code has not been tested with unicode yet. - */ - -#include "yaffs_nameval.h" - -#include "yportenv.h" - -static int nval_find(const char *xb, int xb_size, const YCHAR * name, - int *exist_size) -{ - int pos = 0; - int size; - - memcpy(&size, xb, sizeof(int)); - while (size > 0 && (size < xb_size) && (pos + size < xb_size)) { - if (strncmp - ((YCHAR *) (xb + pos + sizeof(int)), name, size) == 0) { - if (exist_size) - *exist_size = size; - return pos; - } - pos += size; - if (pos < xb_size - sizeof(int)) - memcpy(&size, xb + pos, sizeof(int)); - else - size = 0; - } - if (exist_size) - *exist_size = 0; - return -1; -} - -static int nval_used(const char *xb, int xb_size) -{ - int pos = 0; - int size; - - memcpy(&size, xb + pos, sizeof(int)); - while (size > 0 && (size < xb_size) && (pos + size < xb_size)) { - pos += size; - if (pos < xb_size - sizeof(int)) - memcpy(&size, xb + pos, sizeof(int)); - else - size = 0; - } - return pos; -} - -int nval_del(char *xb, int xb_size, const YCHAR * name) -{ - int pos = nval_find(xb, xb_size, name, NULL); - int size; - - if (pos >= 0 && pos < xb_size) { - /* Find size, shift rest over this record, then zero out the rest of buffer */ - memcpy(&size, xb + pos, sizeof(int)); - memcpy(xb + pos, xb + pos + size, xb_size - (pos + size)); - memset(xb + (xb_size - size), 0, size); - return 0; - } else { - return -ENODATA; - } -} - -int nval_set(char *xb, int xb_size, const YCHAR * name, const char *buf, - int bsize, int flags) -{ - int pos; - int namelen = strnlen(name, xb_size); - int reclen; - int size_exist = 0; - int space; - int start; - - pos = nval_find(xb, xb_size, name, &size_exist); - - if (flags & XATTR_CREATE && pos >= 0) - return -EEXIST; - if (flags & XATTR_REPLACE && pos < 0) - return -ENODATA; - - start = nval_used(xb, xb_size); - space = xb_size - start + size_exist; - - reclen = (sizeof(int) + namelen + 1 + bsize); - - if (reclen > space) - return -ENOSPC; - - if (pos >= 0) { - nval_del(xb, xb_size, name); - start = nval_used(xb, xb_size); - } - - pos = start; - - memcpy(xb + pos, &reclen, sizeof(int)); - pos += sizeof(int); - strncpy((YCHAR *) (xb + pos), name, reclen); - pos += (namelen + 1); - memcpy(xb + pos, buf, bsize); - return 0; -} - -int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf, - int bsize) -{ - int pos = nval_find(xb, xb_size, name, NULL); - int size; - - if (pos >= 0 && pos < xb_size) { - - memcpy(&size, xb + pos, sizeof(int)); - pos += sizeof(int); /* advance past record length */ - size -= sizeof(int); - - /* Advance over name string */ - while (xb[pos] && size > 0 && pos < xb_size) { - pos++; - size--; - } - /*Advance over NUL */ - pos++; - size--; - - if (size <= bsize) { - memcpy(buf, xb + pos, size); - return size; - } - - } - if (pos >= 0) - return -ERANGE; - else - return -ENODATA; -} - -int nval_list(const char *xb, int xb_size, char *buf, int bsize) -{ - int pos = 0; - int size; - int name_len; - int ncopied = 0; - int filled = 0; - - memcpy(&size, xb + pos, sizeof(int)); - while (size > sizeof(int) && size <= xb_size && (pos + size) < xb_size - && !filled) { - pos += sizeof(int); - size -= sizeof(int); - name_len = strnlen((YCHAR *) (xb + pos), size); - if (ncopied + name_len + 1 < bsize) { - memcpy(buf, xb + pos, name_len * sizeof(YCHAR)); - buf += name_len; - *buf = '\0'; - buf++; - if (sizeof(YCHAR) > 1) { - *buf = '\0'; - buf++; - } - ncopied += (name_len + 1); - } else { - filled = 1; - } - pos += size; - if (pos < xb_size - sizeof(int)) - memcpy(&size, xb + pos, sizeof(int)); - else - size = 0; - } - return ncopied; -} - -int nval_hasvalues(const char *xb, int xb_size) -{ - return nval_used(xb, xb_size) > 0; -} diff --git a/fs/yaffs2/yaffs_nameval.h b/fs/yaffs2/yaffs_nameval.h deleted file mode 100644 index 2bb02b6..0000000 --- a/fs/yaffs2/yaffs_nameval.h +++ /dev/null @@ -1,28 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __NAMEVAL_H__ -#define __NAMEVAL_H__ - -#include "yportenv.h" - -int nval_del(char *xb, int xb_size, const YCHAR * name); -int nval_set(char *xb, int xb_size, const YCHAR * name, const char *buf, - int bsize, int flags); -int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf, - int bsize); -int nval_list(const char *xb, int xb_size, char *buf, int bsize); -int nval_hasvalues(const char *xb, int xb_size); -#endif diff --git a/fs/yaffs2/yaffs_nand.c b/fs/yaffs2/yaffs_nand.c deleted file mode 100644 index e816cab..0000000 --- a/fs/yaffs2/yaffs_nand.c +++ /dev/null @@ -1,127 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_nand.h" -#include "yaffs_tagscompat.h" -#include "yaffs_tagsvalidity.h" - -#include "yaffs_getblockinfo.h" - -int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk, - u8 * buffer, struct yaffs_ext_tags *tags) -{ - int result; - struct yaffs_ext_tags local_tags; - - int realigned_chunk = nand_chunk - dev->chunk_offset; - - dev->n_page_reads++; - - /* If there are no tags provided, use local tags to get prioritised gc working */ - if (!tags) - tags = &local_tags; - - if (dev->param.read_chunk_tags_fn) - result = - dev->param.read_chunk_tags_fn(dev, realigned_chunk, buffer, - tags); - else - result = yaffs_tags_compat_rd(dev, - realigned_chunk, buffer, tags); - if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) { - - struct yaffs_block_info *bi; - bi = yaffs_get_block_info(dev, - nand_chunk / - dev->param.chunks_per_block); - yaffs_handle_chunk_error(dev, bi); - } - - return result; -} - -int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev, - int nand_chunk, - const u8 * buffer, struct yaffs_ext_tags *tags) -{ - - dev->n_page_writes++; - - nand_chunk -= dev->chunk_offset; - - if (tags) { - tags->seq_number = dev->seq_number; - tags->chunk_used = 1; - if (!yaffs_validate_tags(tags)) { - yaffs_trace(YAFFS_TRACE_ERROR, "Writing uninitialised tags"); - YBUG(); - } - yaffs_trace(YAFFS_TRACE_WRITE, - "Writing chunk %d tags %d %d", - nand_chunk, tags->obj_id, tags->chunk_id); - } else { - yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags"); - YBUG(); - } - - if (dev->param.write_chunk_tags_fn) - return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer, - tags); - else - return yaffs_tags_compat_wr(dev, nand_chunk, buffer, tags); -} - -int yaffs_mark_bad(struct yaffs_dev *dev, int block_no) -{ - block_no -= dev->block_offset; - - if (dev->param.bad_block_fn) - return dev->param.bad_block_fn(dev, block_no); - else - return yaffs_tags_compat_mark_bad(dev, block_no); -} - -int yaffs_query_init_block_state(struct yaffs_dev *dev, - int block_no, - enum yaffs_block_state *state, - u32 * seq_number) -{ - block_no -= dev->block_offset; - - if (dev->param.query_block_fn) - return dev->param.query_block_fn(dev, block_no, state, - seq_number); - else - return yaffs_tags_compat_query_block(dev, block_no, - state, seq_number); -} - -int yaffs_erase_block(struct yaffs_dev *dev, int flash_block) -{ - int result; - - flash_block -= dev->block_offset; - - dev->n_erasures++; - - result = dev->param.erase_fn(dev, flash_block); - - return result; -} - -int yaffs_init_nand(struct yaffs_dev *dev) -{ - if (dev->param.initialise_flash_fn) - return dev->param.initialise_flash_fn(dev); - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_nand.h b/fs/yaffs2/yaffs_nand.h deleted file mode 100644 index 543f198..0000000 --- a/fs/yaffs2/yaffs_nand.h +++ /dev/null @@ -1,38 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_NAND_H__ -#define __YAFFS_NAND_H__ -#include "yaffs_guts.h" - -int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk, - u8 * buffer, struct yaffs_ext_tags *tags); - -int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev, - int nand_chunk, - const u8 * buffer, struct yaffs_ext_tags *tags); - -int yaffs_mark_bad(struct yaffs_dev *dev, int block_no); - -int yaffs_query_init_block_state(struct yaffs_dev *dev, - int block_no, - enum yaffs_block_state *state, - unsigned *seq_number); - -int yaffs_erase_block(struct yaffs_dev *dev, int flash_block); - -int yaffs_init_nand(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yaffs_packedtags1.c b/fs/yaffs2/yaffs_packedtags1.c deleted file mode 100644 index a77f095..0000000 --- a/fs/yaffs2/yaffs_packedtags1.c +++ /dev/null @@ -1,53 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_packedtags1.h" -#include "yportenv.h" - -void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt, - const struct yaffs_ext_tags *t) -{ - pt->chunk_id = t->chunk_id; - pt->serial_number = t->serial_number; - pt->n_bytes = t->n_bytes; - pt->obj_id = t->obj_id; - pt->ecc = 0; - pt->deleted = (t->is_deleted) ? 0 : 1; - pt->unused_stuff = 0; - pt->should_be_ff = 0xFFFFFFFF; - -} - -void yaffs_unpack_tags1(struct yaffs_ext_tags *t, - const struct yaffs_packed_tags1 *pt) -{ - static const u8 all_ff[] = - { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff - }; - - if (memcmp(all_ff, pt, sizeof(struct yaffs_packed_tags1))) { - t->block_bad = 0; - if (pt->should_be_ff != 0xFFFFFFFF) - t->block_bad = 1; - t->chunk_used = 1; - t->obj_id = pt->obj_id; - t->chunk_id = pt->chunk_id; - t->n_bytes = pt->n_bytes; - t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - t->is_deleted = (pt->deleted) ? 0 : 1; - t->serial_number = pt->serial_number; - } else { - memset(t, 0, sizeof(struct yaffs_ext_tags)); - } -} diff --git a/fs/yaffs2/yaffs_packedtags1.h b/fs/yaffs2/yaffs_packedtags1.h deleted file mode 100644 index d6861ff..0000000 --- a/fs/yaffs2/yaffs_packedtags1.h +++ /dev/null @@ -1,39 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */ - -#ifndef __YAFFS_PACKEDTAGS1_H__ -#define __YAFFS_PACKEDTAGS1_H__ - -#include "yaffs_guts.h" - -struct yaffs_packed_tags1 { - unsigned chunk_id:20; - unsigned serial_number:2; - unsigned n_bytes:10; - unsigned obj_id:18; - unsigned ecc:12; - unsigned deleted:1; - unsigned unused_stuff:1; - unsigned should_be_ff; - -}; - -void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt, - const struct yaffs_ext_tags *t); -void yaffs_unpack_tags1(struct yaffs_ext_tags *t, - const struct yaffs_packed_tags1 *pt); -#endif diff --git a/fs/yaffs2/yaffs_packedtags2.c b/fs/yaffs2/yaffs_packedtags2.c deleted file mode 100644 index 8e7fea3..0000000 --- a/fs/yaffs2/yaffs_packedtags2.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_packedtags2.h" -#include "yportenv.h" -#include "yaffs_trace.h" -#include "yaffs_tagsvalidity.h" - -/* This code packs a set of extended tags into a binary structure for - * NAND storage - */ - -/* Some of the information is "extra" struff which can be packed in to - * speed scanning - * This is defined by having the EXTRA_HEADER_INFO_FLAG set. - */ - -/* Extra flags applied to chunk_id */ - -#define EXTRA_HEADER_INFO_FLAG 0x80000000 -#define EXTRA_SHRINK_FLAG 0x40000000 -#define EXTRA_SHADOWS_FLAG 0x20000000 -#define EXTRA_SPARE_FLAGS 0x10000000 - -#define ALL_EXTRA_FLAGS 0xF0000000 - -/* Also, the top 4 bits of the object Id are set to the object type. */ -#define EXTRA_OBJECT_TYPE_SHIFT (28) -#define EXTRA_OBJECT_TYPE_MASK ((0x0F) << EXTRA_OBJECT_TYPE_SHIFT) - -static void yaffs_dump_packed_tags2_tags_only(const struct - yaffs_packed_tags2_tags_only *ptt) -{ - yaffs_trace(YAFFS_TRACE_MTD, - "packed tags obj %d chunk %d byte %d seq %d", - ptt->obj_id, ptt->chunk_id, ptt->n_bytes, ptt->seq_number); -} - -static void yaffs_dump_packed_tags2(const struct yaffs_packed_tags2 *pt) -{ - yaffs_dump_packed_tags2_tags_only(&pt->t); -} - -static void yaffs_dump_tags2(const struct yaffs_ext_tags *t) -{ - yaffs_trace(YAFFS_TRACE_MTD, - "ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d", - t->ecc_result, t->block_bad, t->chunk_used, t->obj_id, - t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number, - t->seq_number); - -} - -void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *ptt, - const struct yaffs_ext_tags *t) -{ - ptt->chunk_id = t->chunk_id; - ptt->seq_number = t->seq_number; - ptt->n_bytes = t->n_bytes; - ptt->obj_id = t->obj_id; - - if (t->chunk_id == 0 && t->extra_available) { - /* Store the extra header info instead */ - /* We save the parent object in the chunk_id */ - ptt->chunk_id = EXTRA_HEADER_INFO_FLAG | t->extra_parent_id; - if (t->extra_is_shrink) - ptt->chunk_id |= EXTRA_SHRINK_FLAG; - if (t->extra_shadows) - ptt->chunk_id |= EXTRA_SHADOWS_FLAG; - - ptt->obj_id &= ~EXTRA_OBJECT_TYPE_MASK; - ptt->obj_id |= (t->extra_obj_type << EXTRA_OBJECT_TYPE_SHIFT); - - if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK) - ptt->n_bytes = t->extra_equiv_id; - else if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE) - ptt->n_bytes = t->extra_length; - else - ptt->n_bytes = 0; - } - - yaffs_dump_packed_tags2_tags_only(ptt); - yaffs_dump_tags2(t); -} - -void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt, - const struct yaffs_ext_tags *t, int tags_ecc) -{ - yaffs_pack_tags2_tags_only(&pt->t, t); - - if (tags_ecc) - yaffs_ecc_calc_other((unsigned char *)&pt->t, - sizeof(struct - yaffs_packed_tags2_tags_only), - &pt->ecc); -} - -void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t, - struct yaffs_packed_tags2_tags_only *ptt) -{ - - memset(t, 0, sizeof(struct yaffs_ext_tags)); - - yaffs_init_tags(t); - - if (ptt->seq_number != 0xFFFFFFFF) { - t->block_bad = 0; - t->chunk_used = 1; - t->obj_id = ptt->obj_id; - t->chunk_id = ptt->chunk_id; - t->n_bytes = ptt->n_bytes; - t->is_deleted = 0; - t->serial_number = 0; - t->seq_number = ptt->seq_number; - - /* Do extra header info stuff */ - - if (ptt->chunk_id & EXTRA_HEADER_INFO_FLAG) { - t->chunk_id = 0; - t->n_bytes = 0; - - t->extra_available = 1; - t->extra_parent_id = - ptt->chunk_id & (~(ALL_EXTRA_FLAGS)); - t->extra_is_shrink = - (ptt->chunk_id & EXTRA_SHRINK_FLAG) ? 1 : 0; - t->extra_shadows = - (ptt->chunk_id & EXTRA_SHADOWS_FLAG) ? 1 : 0; - t->extra_obj_type = - ptt->obj_id >> EXTRA_OBJECT_TYPE_SHIFT; - t->obj_id &= ~EXTRA_OBJECT_TYPE_MASK; - - if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK) - t->extra_equiv_id = ptt->n_bytes; - else - t->extra_length = ptt->n_bytes; - } - } - - yaffs_dump_packed_tags2_tags_only(ptt); - yaffs_dump_tags2(t); - -} - -void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt, - int tags_ecc) -{ - - enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - - if (pt->t.seq_number != 0xFFFFFFFF && tags_ecc) { - /* Chunk is in use and we need to do ECC */ - - struct yaffs_ecc_other ecc; - int result; - yaffs_ecc_calc_other((unsigned char *)&pt->t, - sizeof(struct - yaffs_packed_tags2_tags_only), - &ecc); - result = - yaffs_ecc_correct_other((unsigned char *)&pt->t, - sizeof(struct - yaffs_packed_tags2_tags_only), - &pt->ecc, &ecc); - switch (result) { - case 0: - ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - break; - case 1: - ecc_result = YAFFS_ECC_RESULT_FIXED; - break; - case -1: - ecc_result = YAFFS_ECC_RESULT_UNFIXED; - break; - default: - ecc_result = YAFFS_ECC_RESULT_UNKNOWN; - } - } - - yaffs_unpack_tags2_tags_only(t, &pt->t); - - t->ecc_result = ecc_result; - - yaffs_dump_packed_tags2(pt); - yaffs_dump_tags2(t); -} diff --git a/fs/yaffs2/yaffs_packedtags2.h b/fs/yaffs2/yaffs_packedtags2.h deleted file mode 100644 index f329669..0000000 --- a/fs/yaffs2/yaffs_packedtags2.h +++ /dev/null @@ -1,47 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* This is used to pack YAFFS2 tags, not YAFFS1tags. */ - -#ifndef __YAFFS_PACKEDTAGS2_H__ -#define __YAFFS_PACKEDTAGS2_H__ - -#include "yaffs_guts.h" -#include "yaffs_ecc.h" - -struct yaffs_packed_tags2_tags_only { - unsigned seq_number; - unsigned obj_id; - unsigned chunk_id; - unsigned n_bytes; -}; - -struct yaffs_packed_tags2 { - struct yaffs_packed_tags2_tags_only t; - struct yaffs_ecc_other ecc; -}; - -/* Full packed tags with ECC, used for oob tags */ -void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt, - const struct yaffs_ext_tags *t, int tags_ecc); -void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt, - int tags_ecc); - -/* Only the tags part (no ECC for use with inband tags */ -void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt, - const struct yaffs_ext_tags *t); -void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t, - struct yaffs_packed_tags2_tags_only *pt); -#endif diff --git a/fs/yaffs2/yaffs_tagscompat.c b/fs/yaffs2/yaffs_tagscompat.c deleted file mode 100644 index 7578075..0000000 --- a/fs/yaffs2/yaffs_tagscompat.c +++ /dev/null @@ -1,422 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_guts.h" -#include "yaffs_tagscompat.h" -#include "yaffs_ecc.h" -#include "yaffs_getblockinfo.h" -#include "yaffs_trace.h" - -static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk); - - -/********** Tags ECC calculations *********/ - -void yaffs_calc_ecc(const u8 * data, struct yaffs_spare *spare) -{ - yaffs_ecc_cacl(data, spare->ecc1); - yaffs_ecc_cacl(&data[256], spare->ecc2); -} - -void yaffs_calc_tags_ecc(struct yaffs_tags *tags) -{ - /* Calculate an ecc */ - - unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes; - unsigned i, j; - unsigned ecc = 0; - unsigned bit = 0; - - tags->ecc = 0; - - for (i = 0; i < 8; i++) { - for (j = 1; j & 0xff; j <<= 1) { - bit++; - if (b[i] & j) - ecc ^= bit; - } - } - - tags->ecc = ecc; - -} - -int yaffs_check_tags_ecc(struct yaffs_tags *tags) -{ - unsigned ecc = tags->ecc; - - yaffs_calc_tags_ecc(tags); - - ecc ^= tags->ecc; - - if (ecc && ecc <= 64) { - /* TODO: Handle the failure better. Retire? */ - unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes; - - ecc--; - - b[ecc / 8] ^= (1 << (ecc & 7)); - - /* Now recvalc the ecc */ - yaffs_calc_tags_ecc(tags); - - return 1; /* recovered error */ - } else if (ecc) { - /* Wierd ecc failure value */ - /* TODO Need to do somethiong here */ - return -1; /* unrecovered error */ - } - - return 0; -} - -/********** Tags **********/ - -static void yaffs_load_tags_to_spare(struct yaffs_spare *spare_ptr, - struct yaffs_tags *tags_ptr) -{ - union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr; - - yaffs_calc_tags_ecc(tags_ptr); - - spare_ptr->tb0 = tu->as_bytes[0]; - spare_ptr->tb1 = tu->as_bytes[1]; - spare_ptr->tb2 = tu->as_bytes[2]; - spare_ptr->tb3 = tu->as_bytes[3]; - spare_ptr->tb4 = tu->as_bytes[4]; - spare_ptr->tb5 = tu->as_bytes[5]; - spare_ptr->tb6 = tu->as_bytes[6]; - spare_ptr->tb7 = tu->as_bytes[7]; -} - -static void yaffs_get_tags_from_spare(struct yaffs_dev *dev, - struct yaffs_spare *spare_ptr, - struct yaffs_tags *tags_ptr) -{ - union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr; - int result; - - tu->as_bytes[0] = spare_ptr->tb0; - tu->as_bytes[1] = spare_ptr->tb1; - tu->as_bytes[2] = spare_ptr->tb2; - tu->as_bytes[3] = spare_ptr->tb3; - tu->as_bytes[4] = spare_ptr->tb4; - tu->as_bytes[5] = spare_ptr->tb5; - tu->as_bytes[6] = spare_ptr->tb6; - tu->as_bytes[7] = spare_ptr->tb7; - - result = yaffs_check_tags_ecc(tags_ptr); - if (result > 0) - dev->n_tags_ecc_fixed++; - else if (result < 0) - dev->n_tags_ecc_unfixed++; -} - -static void yaffs_spare_init(struct yaffs_spare *spare) -{ - memset(spare, 0xFF, sizeof(struct yaffs_spare)); -} - -static int yaffs_wr_nand(struct yaffs_dev *dev, - int nand_chunk, const u8 * data, - struct yaffs_spare *spare) -{ - if (nand_chunk < dev->param.start_block * dev->param.chunks_per_block) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>> yaffs chunk %d is not valid", - nand_chunk); - return YAFFS_FAIL; - } - - return dev->param.write_chunk_fn(dev, nand_chunk, data, spare); -} - -static int yaffs_rd_chunk_nand(struct yaffs_dev *dev, - int nand_chunk, - u8 * data, - struct yaffs_spare *spare, - enum yaffs_ecc_result *ecc_result, - int correct_errors) -{ - int ret_val; - struct yaffs_spare local_spare; - - if (!spare && data) { - /* If we don't have a real spare, then we use a local one. */ - /* Need this for the calculation of the ecc */ - spare = &local_spare; - } - - if (!dev->param.use_nand_ecc) { - ret_val = - dev->param.read_chunk_fn(dev, nand_chunk, data, spare); - if (data && correct_errors) { - /* Do ECC correction */ - /* Todo handle any errors */ - int ecc_result1, ecc_result2; - u8 calc_ecc[3]; - - yaffs_ecc_cacl(data, calc_ecc); - ecc_result1 = - yaffs_ecc_correct(data, spare->ecc1, calc_ecc); - yaffs_ecc_cacl(&data[256], calc_ecc); - ecc_result2 = - yaffs_ecc_correct(&data[256], spare->ecc2, - calc_ecc); - - if (ecc_result1 > 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>yaffs ecc error fix performed on chunk %d:0", - nand_chunk); - dev->n_ecc_fixed++; - } else if (ecc_result1 < 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>yaffs ecc error unfixed on chunk %d:0", - nand_chunk); - dev->n_ecc_unfixed++; - } - - if (ecc_result2 > 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>yaffs ecc error fix performed on chunk %d:1", - nand_chunk); - dev->n_ecc_fixed++; - } else if (ecc_result2 < 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>yaffs ecc error unfixed on chunk %d:1", - nand_chunk); - dev->n_ecc_unfixed++; - } - - if (ecc_result1 || ecc_result2) { - /* We had a data problem on this page */ - yaffs_handle_rd_data_error(dev, nand_chunk); - } - - if (ecc_result1 < 0 || ecc_result2 < 0) - *ecc_result = YAFFS_ECC_RESULT_UNFIXED; - else if (ecc_result1 > 0 || ecc_result2 > 0) - *ecc_result = YAFFS_ECC_RESULT_FIXED; - else - *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - } - } else { - /* Must allocate enough memory for spare+2*sizeof(int) */ - /* for ecc results from device. */ - struct yaffs_nand_spare nspare; - - memset(&nspare, 0, sizeof(nspare)); - - ret_val = dev->param.read_chunk_fn(dev, nand_chunk, data, - (struct yaffs_spare *) - &nspare); - memcpy(spare, &nspare, sizeof(struct yaffs_spare)); - if (data && correct_errors) { - if (nspare.eccres1 > 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>mtd ecc error fix performed on chunk %d:0", - nand_chunk); - } else if (nspare.eccres1 < 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>mtd ecc error unfixed on chunk %d:0", - nand_chunk); - } - - if (nspare.eccres2 > 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>mtd ecc error fix performed on chunk %d:1", - nand_chunk); - } else if (nspare.eccres2 < 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>mtd ecc error unfixed on chunk %d:1", - nand_chunk); - } - - if (nspare.eccres1 || nspare.eccres2) { - /* We had a data problem on this page */ - yaffs_handle_rd_data_error(dev, nand_chunk); - } - - if (nspare.eccres1 < 0 || nspare.eccres2 < 0) - *ecc_result = YAFFS_ECC_RESULT_UNFIXED; - else if (nspare.eccres1 > 0 || nspare.eccres2 > 0) - *ecc_result = YAFFS_ECC_RESULT_FIXED; - else - *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - - } - } - return ret_val; -} - -/* - * Functions for robustisizing - */ - -static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk) -{ - int flash_block = nand_chunk / dev->param.chunks_per_block; - - /* Mark the block for retirement */ - yaffs_get_block_info(dev, - flash_block + dev->block_offset)->needs_retiring = - 1; - yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - "**>>Block %d marked for retirement", - flash_block); - - /* TODO: - * Just do a garbage collection on the affected block - * then retire the block - * NB recursion - */ -} - -int yaffs_tags_compat_wr(struct yaffs_dev *dev, - int nand_chunk, - const u8 * data, const struct yaffs_ext_tags *ext_tags) -{ - struct yaffs_spare spare; - struct yaffs_tags tags; - - yaffs_spare_init(&spare); - - if (ext_tags->is_deleted) - spare.page_status = 0; - else { - tags.obj_id = ext_tags->obj_id; - tags.chunk_id = ext_tags->chunk_id; - - tags.n_bytes_lsb = ext_tags->n_bytes & 0x3ff; - - if (dev->data_bytes_per_chunk >= 1024) - tags.n_bytes_msb = (ext_tags->n_bytes >> 10) & 3; - else - tags.n_bytes_msb = 3; - - tags.serial_number = ext_tags->serial_number; - - if (!dev->param.use_nand_ecc && data) - yaffs_calc_ecc(data, &spare); - - yaffs_load_tags_to_spare(&spare, &tags); - - } - - return yaffs_wr_nand(dev, nand_chunk, data, &spare); -} - -int yaffs_tags_compat_rd(struct yaffs_dev *dev, - int nand_chunk, - u8 * data, struct yaffs_ext_tags *ext_tags) -{ - - struct yaffs_spare spare; - struct yaffs_tags tags; - enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN; - - static struct yaffs_spare spare_ff; - static int init; - - if (!init) { - memset(&spare_ff, 0xFF, sizeof(spare_ff)); - init = 1; - } - - if (yaffs_rd_chunk_nand(dev, nand_chunk, data, &spare, &ecc_result, 1)) { - /* ext_tags may be NULL */ - if (ext_tags) { - - int deleted = - (hweight8(spare.page_status) < 7) ? 1 : 0; - - ext_tags->is_deleted = deleted; - ext_tags->ecc_result = ecc_result; - ext_tags->block_bad = 0; /* We're reading it */ - /* therefore it is not a bad block */ - ext_tags->chunk_used = - (memcmp(&spare_ff, &spare, sizeof(spare_ff)) != - 0) ? 1 : 0; - - if (ext_tags->chunk_used) { - yaffs_get_tags_from_spare(dev, &spare, &tags); - - ext_tags->obj_id = tags.obj_id; - ext_tags->chunk_id = tags.chunk_id; - ext_tags->n_bytes = tags.n_bytes_lsb; - - if (dev->data_bytes_per_chunk >= 1024) - ext_tags->n_bytes |= - (((unsigned)tags. - n_bytes_msb) << 10); - - ext_tags->serial_number = tags.serial_number; - } - } - - return YAFFS_OK; - } else { - return YAFFS_FAIL; - } -} - -int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block) -{ - - struct yaffs_spare spare; - - memset(&spare, 0xff, sizeof(struct yaffs_spare)); - - spare.block_status = 'Y'; - - yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL, - &spare); - yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1, - NULL, &spare); - - return YAFFS_OK; - -} - -int yaffs_tags_compat_query_block(struct yaffs_dev *dev, - int block_no, - enum yaffs_block_state *state, - u32 * seq_number) -{ - - struct yaffs_spare spare0, spare1; - static struct yaffs_spare spare_ff; - static int init; - enum yaffs_ecc_result dummy; - - if (!init) { - memset(&spare_ff, 0xFF, sizeof(spare_ff)); - init = 1; - } - - *seq_number = 0; - - yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block, NULL, - &spare0, &dummy, 1); - yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1, - NULL, &spare1, &dummy, 1); - - if (hweight8(spare0.block_status & spare1.block_status) < 7) - *state = YAFFS_BLOCK_STATE_DEAD; - else if (memcmp(&spare_ff, &spare0, sizeof(spare_ff)) == 0) - *state = YAFFS_BLOCK_STATE_EMPTY; - else - *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; - - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_tagscompat.h b/fs/yaffs2/yaffs_tagscompat.h deleted file mode 100644 index 8cd35dc..0000000 --- a/fs/yaffs2/yaffs_tagscompat.h +++ /dev/null @@ -1,36 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_TAGSCOMPAT_H__ -#define __YAFFS_TAGSCOMPAT_H__ - -#include "yaffs_guts.h" -int yaffs_tags_compat_wr(struct yaffs_dev *dev, - int nand_chunk, - const u8 * data, const struct yaffs_ext_tags *tags); -int yaffs_tags_compat_rd(struct yaffs_dev *dev, - int nand_chunk, - u8 * data, struct yaffs_ext_tags *tags); -int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int block_no); -int yaffs_tags_compat_query_block(struct yaffs_dev *dev, - int block_no, - enum yaffs_block_state *state, - u32 * seq_number); - -void yaffs_calc_tags_ecc(struct yaffs_tags *tags); -int yaffs_check_tags_ecc(struct yaffs_tags *tags); -int yaffs_count_bits(u8 byte); - -#endif diff --git a/fs/yaffs2/yaffs_tagsvalidity.c b/fs/yaffs2/yaffs_tagsvalidity.c deleted file mode 100644 index 4358d79..0000000 --- a/fs/yaffs2/yaffs_tagsvalidity.c +++ /dev/null @@ -1,27 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_tagsvalidity.h" - -void yaffs_init_tags(struct yaffs_ext_tags *tags) -{ - memset(tags, 0, sizeof(struct yaffs_ext_tags)); - tags->validity0 = 0xAAAAAAAA; - tags->validity1 = 0x55555555; -} - -int yaffs_validate_tags(struct yaffs_ext_tags *tags) -{ - return (tags->validity0 == 0xAAAAAAAA && tags->validity1 == 0x55555555); - -} diff --git a/fs/yaffs2/yaffs_tagsvalidity.h b/fs/yaffs2/yaffs_tagsvalidity.h deleted file mode 100644 index 36a021f..0000000 --- a/fs/yaffs2/yaffs_tagsvalidity.h +++ /dev/null @@ -1,23 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_TAGS_VALIDITY_H__ -#define __YAFFS_TAGS_VALIDITY_H__ - -#include "yaffs_guts.h" - -void yaffs_init_tags(struct yaffs_ext_tags *tags); -int yaffs_validate_tags(struct yaffs_ext_tags *tags); -#endif diff --git a/fs/yaffs2/yaffs_trace.h b/fs/yaffs2/yaffs_trace.h deleted file mode 100644 index 6273dbf..0000000 --- a/fs/yaffs2/yaffs_trace.h +++ /dev/null @@ -1,57 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YTRACE_H__ -#define __YTRACE_H__ - -extern unsigned int yaffs_trace_mask; -extern unsigned int yaffs_wr_attempts; - -/* - * Tracing flags. - * The flags masked in YAFFS_TRACE_ALWAYS are always traced. - */ - -#define YAFFS_TRACE_OS 0x00000002 -#define YAFFS_TRACE_ALLOCATE 0x00000004 -#define YAFFS_TRACE_SCAN 0x00000008 -#define YAFFS_TRACE_BAD_BLOCKS 0x00000010 -#define YAFFS_TRACE_ERASE 0x00000020 -#define YAFFS_TRACE_GC 0x00000040 -#define YAFFS_TRACE_WRITE 0x00000080 -#define YAFFS_TRACE_TRACING 0x00000100 -#define YAFFS_TRACE_DELETION 0x00000200 -#define YAFFS_TRACE_BUFFERS 0x00000400 -#define YAFFS_TRACE_NANDACCESS 0x00000800 -#define YAFFS_TRACE_GC_DETAIL 0x00001000 -#define YAFFS_TRACE_SCAN_DEBUG 0x00002000 -#define YAFFS_TRACE_MTD 0x00004000 -#define YAFFS_TRACE_CHECKPOINT 0x00008000 - -#define YAFFS_TRACE_VERIFY 0x00010000 -#define YAFFS_TRACE_VERIFY_NAND 0x00020000 -#define YAFFS_TRACE_VERIFY_FULL 0x00040000 -#define YAFFS_TRACE_VERIFY_ALL 0x000F0000 - -#define YAFFS_TRACE_SYNC 0x00100000 -#define YAFFS_TRACE_BACKGROUND 0x00200000 -#define YAFFS_TRACE_LOCK 0x00400000 -#define YAFFS_TRACE_MOUNT 0x00800000 - -#define YAFFS_TRACE_ERROR 0x40000000 -#define YAFFS_TRACE_BUG 0x80000000 -#define YAFFS_TRACE_ALWAYS 0xF0000000 - -#endif diff --git a/fs/yaffs2/yaffs_verify.c b/fs/yaffs2/yaffs_verify.c deleted file mode 100644 index 738c7f6..0000000 --- a/fs/yaffs2/yaffs_verify.c +++ /dev/null @@ -1,535 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_verify.h" -#include "yaffs_trace.h" -#include "yaffs_bitmap.h" -#include "yaffs_getblockinfo.h" -#include "yaffs_nand.h" - -int yaffs_skip_verification(struct yaffs_dev *dev) -{ - dev = dev; - return !(yaffs_trace_mask & - (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); -} - -static int yaffs_skip_full_verification(struct yaffs_dev *dev) -{ - dev = dev; - return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL)); -} - -static int yaffs_skip_nand_verification(struct yaffs_dev *dev) -{ - dev = dev; - return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND)); -} - -static const char *block_state_name[] = { - "Unknown", - "Needs scanning", - "Scanning", - "Empty", - "Allocating", - "Full", - "Dirty", - "Checkpoint", - "Collecting", - "Dead" -}; - -void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, int n) -{ - int actually_used; - int in_use; - - if (yaffs_skip_verification(dev)) - return; - - /* Report illegal runtime states */ - if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Block %d has undefined state %d", - n, bi->block_state); - - switch (bi->block_state) { - case YAFFS_BLOCK_STATE_UNKNOWN: - case YAFFS_BLOCK_STATE_SCANNING: - case YAFFS_BLOCK_STATE_NEEDS_SCANNING: - yaffs_trace(YAFFS_TRACE_VERIFY, - "Block %d has bad run-state %s", - n, block_state_name[bi->block_state]); - } - - /* Check pages in use and soft deletions are legal */ - - actually_used = bi->pages_in_use - bi->soft_del_pages; - - if (bi->pages_in_use < 0 - || bi->pages_in_use > dev->param.chunks_per_block - || bi->soft_del_pages < 0 - || bi->soft_del_pages > dev->param.chunks_per_block - || actually_used < 0 || actually_used > dev->param.chunks_per_block) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Block %d has illegal values pages_in_used %d soft_del_pages %d", - n, bi->pages_in_use, bi->soft_del_pages); - - /* Check chunk bitmap legal */ - in_use = yaffs_count_chunk_bits(dev, n); - if (in_use != bi->pages_in_use) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Block %d has inconsistent values pages_in_use %d counted chunk bits %d", - n, bi->pages_in_use, in_use); - -} - -void yaffs_verify_collected_blk(struct yaffs_dev *dev, - struct yaffs_block_info *bi, int n) -{ - yaffs_verify_blk(dev, bi, n); - - /* After collection the block should be in the erased state */ - - if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING && - bi->block_state != YAFFS_BLOCK_STATE_EMPTY) { - yaffs_trace(YAFFS_TRACE_ERROR, - "Block %d is in state %d after gc, should be erased", - n, bi->block_state); - } -} - -void yaffs_verify_blocks(struct yaffs_dev *dev) -{ - int i; - int state_count[YAFFS_NUMBER_OF_BLOCK_STATES]; - int illegal_states = 0; - - if (yaffs_skip_verification(dev)) - return; - - memset(state_count, 0, sizeof(state_count)); - - for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { - struct yaffs_block_info *bi = yaffs_get_block_info(dev, i); - yaffs_verify_blk(dev, bi, i); - - if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES) - state_count[bi->block_state]++; - else - illegal_states++; - } - - yaffs_trace(YAFFS_TRACE_VERIFY, "Block summary"); - - yaffs_trace(YAFFS_TRACE_VERIFY, - "%d blocks have illegal states", - illegal_states); - if (state_count[YAFFS_BLOCK_STATE_ALLOCATING] > 1) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Too many allocating blocks"); - - for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) - yaffs_trace(YAFFS_TRACE_VERIFY, - "%s %d blocks", - block_state_name[i], state_count[i]); - - if (dev->blocks_in_checkpt != state_count[YAFFS_BLOCK_STATE_CHECKPOINT]) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Checkpoint block count wrong dev %d count %d", - dev->blocks_in_checkpt, - state_count[YAFFS_BLOCK_STATE_CHECKPOINT]); - - if (dev->n_erased_blocks != state_count[YAFFS_BLOCK_STATE_EMPTY]) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Erased block count wrong dev %d count %d", - dev->n_erased_blocks, - state_count[YAFFS_BLOCK_STATE_EMPTY]); - - if (state_count[YAFFS_BLOCK_STATE_COLLECTING] > 1) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Too many collecting blocks %d (max is 1)", - state_count[YAFFS_BLOCK_STATE_COLLECTING]); -} - -/* - * Verify the object header. oh must be valid, but obj and tags may be NULL in which - * case those tests will not be performed. - */ -void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh, - struct yaffs_ext_tags *tags, int parent_check) -{ - if (obj && yaffs_skip_verification(obj->my_dev)) - return; - - if (!(tags && obj && oh)) { - yaffs_trace(YAFFS_TRACE_VERIFY, - "Verifying object header tags %p obj %p oh %p", - tags, obj, oh); - return; - } - - if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || - oh->type > YAFFS_OBJECT_TYPE_MAX) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header type is illegal value 0x%x", - tags->obj_id, oh->type); - - if (tags->obj_id != obj->obj_id) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header mismatch obj_id %d", - tags->obj_id, obj->obj_id); - - /* - * Check that the object's parent ids match if parent_check requested. - * - * Tests do not apply to the root object. - */ - - if (parent_check && tags->obj_id > 1 && !obj->parent) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header mismatch parent_id %d obj->parent is NULL", - tags->obj_id, oh->parent_obj_id); - - if (parent_check && obj->parent && - oh->parent_obj_id != obj->parent->obj_id && - (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED || - obj->parent->obj_id != YAFFS_OBJECTID_DELETED)) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header mismatch parent_id %d parent_obj_id %d", - tags->obj_id, oh->parent_obj_id, - obj->parent->obj_id); - - if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */ - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header name is NULL", - obj->obj_id); - - if (tags->obj_id > 1 && ((u8) (oh->name[0])) == 0xff) /* Trashed name */ - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header name is 0xFF", - obj->obj_id); -} - -void yaffs_verify_file(struct yaffs_obj *obj) -{ - int required_depth; - int actual_depth; - u32 last_chunk; - u32 x; - u32 i; - struct yaffs_dev *dev; - struct yaffs_ext_tags tags; - struct yaffs_tnode *tn; - u32 obj_id; - - if (!obj) - return; - - if (yaffs_skip_verification(obj->my_dev)) - return; - - dev = obj->my_dev; - obj_id = obj->obj_id; - - /* Check file size is consistent with tnode depth */ - last_chunk = - obj->variant.file_variant.file_size / dev->data_bytes_per_chunk + 1; - x = last_chunk >> YAFFS_TNODES_LEVEL0_BITS; - required_depth = 0; - while (x > 0) { - x >>= YAFFS_TNODES_INTERNAL_BITS; - required_depth++; - } - - actual_depth = obj->variant.file_variant.top_level; - - /* Check that the chunks in the tnode tree are all correct. - * We do this by scanning through the tnode tree and - * checking the tags for every chunk match. - */ - - if (yaffs_skip_nand_verification(dev)) - return; - - for (i = 1; i <= last_chunk; i++) { - tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i); - - if (tn) { - u32 the_chunk = yaffs_get_group_base(dev, tn, i); - if (the_chunk > 0) { - yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, - &tags); - if (tags.obj_id != obj_id || tags.chunk_id != i) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)", - obj_id, i, the_chunk, - tags.obj_id, tags.chunk_id); - } - } - } -} - -void yaffs_verify_link(struct yaffs_obj *obj) -{ - if (obj && yaffs_skip_verification(obj->my_dev)) - return; - - /* Verify sane equivalent object */ -} - -void yaffs_verify_symlink(struct yaffs_obj *obj) -{ - if (obj && yaffs_skip_verification(obj->my_dev)) - return; - - /* Verify symlink string */ -} - -void yaffs_verify_special(struct yaffs_obj *obj) -{ - if (obj && yaffs_skip_verification(obj->my_dev)) - return; -} - -void yaffs_verify_obj(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev; - - u32 chunk_min; - u32 chunk_max; - - u32 chunk_id_ok; - u32 chunk_in_range; - u32 chunk_wrongly_deleted; - u32 chunk_valid; - - if (!obj) - return; - - if (obj->being_created) - return; - - dev = obj->my_dev; - - if (yaffs_skip_verification(dev)) - return; - - /* Check sane object header chunk */ - - chunk_min = dev->internal_start_block * dev->param.chunks_per_block; - chunk_max = - (dev->internal_end_block + 1) * dev->param.chunks_per_block - 1; - - chunk_in_range = (((unsigned)(obj->hdr_chunk)) >= chunk_min && - ((unsigned)(obj->hdr_chunk)) <= chunk_max); - chunk_id_ok = chunk_in_range || (obj->hdr_chunk == 0); - chunk_valid = chunk_in_range && - yaffs_check_chunk_bit(dev, - obj->hdr_chunk / dev->param.chunks_per_block, - obj->hdr_chunk % dev->param.chunks_per_block); - chunk_wrongly_deleted = chunk_in_range && !chunk_valid; - - if (!obj->fake && (!chunk_id_ok || chunk_wrongly_deleted)) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d has chunk_id %d %s %s", - obj->obj_id, obj->hdr_chunk, - chunk_id_ok ? "" : ",out of range", - chunk_wrongly_deleted ? ",marked as deleted" : ""); - - if (chunk_valid && !yaffs_skip_nand_verification(dev)) { - struct yaffs_ext_tags tags; - struct yaffs_obj_hdr *oh; - u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); - - oh = (struct yaffs_obj_hdr *)buffer; - - yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer, &tags); - - yaffs_verify_oh(obj, oh, &tags, 1); - - yaffs_release_temp_buffer(dev, buffer, __LINE__); - } - - /* Verify it has a parent */ - if (obj && !obj->fake && (!obj->parent || obj->parent->my_dev != dev)) { - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d has parent pointer %p which does not look like an object", - obj->obj_id, obj->parent); - } - - /* Verify parent is a directory */ - if (obj->parent - && obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d's parent is not a directory (type %d)", - obj->obj_id, obj->parent->variant_type); - } - - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - yaffs_verify_file(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_verify_symlink(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - yaffs_verify_dir(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - yaffs_verify_link(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - yaffs_verify_special(obj); - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - default: - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d has illegaltype %d", - obj->obj_id, obj->variant_type); - break; - } -} - -void yaffs_verify_objects(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj; - int i; - struct list_head *lh; - - if (yaffs_skip_verification(dev)) - return; - - /* Iterate through the objects in each hash entry */ - - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - list_for_each(lh, &dev->obj_bucket[i].list) { - if (lh) { - obj = - list_entry(lh, struct yaffs_obj, hash_link); - yaffs_verify_obj(obj); - } - } - } -} - -void yaffs_verify_obj_in_dir(struct yaffs_obj *obj) -{ - struct list_head *lh; - struct yaffs_obj *list_obj; - - int count = 0; - - if (!obj) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "No object to verify"); - YBUG(); - return; - } - - if (yaffs_skip_verification(obj->my_dev)) - return; - - if (!obj->parent) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "Object does not have parent" ); - YBUG(); - return; - } - - if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "Parent is not directory"); - YBUG(); - } - - /* Iterate through the objects in each hash entry */ - - list_for_each(lh, &obj->parent->variant.dir_variant.children) { - if (lh) { - list_obj = list_entry(lh, struct yaffs_obj, siblings); - yaffs_verify_obj(list_obj); - if (obj == list_obj) - count++; - } - } - - if (count != 1) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Object in directory %d times", - count); - YBUG(); - } -} - -void yaffs_verify_dir(struct yaffs_obj *directory) -{ - struct list_head *lh; - struct yaffs_obj *list_obj; - - if (!directory) { - YBUG(); - return; - } - - if (yaffs_skip_full_verification(directory->my_dev)) - return; - - if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Directory has wrong type: %d", - directory->variant_type); - YBUG(); - } - - /* Iterate through the objects in each hash entry */ - - list_for_each(lh, &directory->variant.dir_variant.children) { - if (lh) { - list_obj = list_entry(lh, struct yaffs_obj, siblings); - if (list_obj->parent != directory) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Object in directory list has wrong parent %p", - list_obj->parent); - YBUG(); - } - yaffs_verify_obj_in_dir(list_obj); - } - } -} - -static int yaffs_free_verification_failures; - -void yaffs_verify_free_chunks(struct yaffs_dev *dev) -{ - int counted; - int difference; - - if (yaffs_skip_verification(dev)) - return; - - counted = yaffs_count_free_chunks(dev); - - difference = dev->n_free_chunks - counted; - - if (difference) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Freechunks verification failure %d %d %d", - dev->n_free_chunks, counted, difference); - yaffs_free_verification_failures++; - } -} - -int yaffs_verify_file_sane(struct yaffs_obj *in) -{ - in = in; - return YAFFS_OK; -} - diff --git a/fs/yaffs2/yaffs_verify.h b/fs/yaffs2/yaffs_verify.h deleted file mode 100644 index cc6f889..0000000 --- a/fs/yaffs2/yaffs_verify.h +++ /dev/null @@ -1,43 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_VERIFY_H__ -#define __YAFFS_VERIFY_H__ - -#include "yaffs_guts.h" - -void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, - int n); -void yaffs_verify_collected_blk(struct yaffs_dev *dev, - struct yaffs_block_info *bi, int n); -void yaffs_verify_blocks(struct yaffs_dev *dev); - -void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh, - struct yaffs_ext_tags *tags, int parent_check); -void yaffs_verify_file(struct yaffs_obj *obj); -void yaffs_verify_link(struct yaffs_obj *obj); -void yaffs_verify_symlink(struct yaffs_obj *obj); -void yaffs_verify_special(struct yaffs_obj *obj); -void yaffs_verify_obj(struct yaffs_obj *obj); -void yaffs_verify_objects(struct yaffs_dev *dev); -void yaffs_verify_obj_in_dir(struct yaffs_obj *obj); -void yaffs_verify_dir(struct yaffs_obj *directory); -void yaffs_verify_free_chunks(struct yaffs_dev *dev); - -int yaffs_verify_file_sane(struct yaffs_obj *obj); - -int yaffs_skip_verification(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yaffs_vfs.c b/fs/yaffs2/yaffs_vfs.c deleted file mode 100644 index d5b8753..0000000 --- a/fs/yaffs2/yaffs_vfs.c +++ /dev/null @@ -1,2792 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * Acknowledgements: - * Luc van OostenRyck for numerous patches. - * Nick Bane for numerous patches. - * Nick Bane for 2.5/2.6 integration. - * Andras Toth for mknod rdev issue. - * Michael Fischer for finding the problem with inode inconsistency. - * Some code bodily lifted from JFFS - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * - * This is the file system front-end to YAFFS that hooks it up to - * the VFS. - * - * Special notes: - * >> 2.4: sb->u.generic_sbp points to the struct yaffs_dev associated with - * this superblock - * >> 2.6: sb->s_fs_info points to the struct yaffs_dev associated with this - * superblock - * >> inode->u.generic_ip points to the associated struct yaffs_obj. - */ - -/* - * NB There are two variants of Linux VFS glue code. This variant supports - * a single version and should not include any multi-version code. - */ -#include <linux/version.h> - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/fs.h> -#include <linux/proc_fs.h> -#include <linux/smp_lock.h> -#include <linux/pagemap.h> -#include <linux/mtd/mtd.h> -#include <linux/interrupt.h> -#include <linux/string.h> -#include <linux/ctype.h> -#include <linux/namei.h> -#include <linux/exportfs.h> -#include <linux/kthread.h> -#include <linux/delay.h> -#include <linux/freezer.h> - -#include <asm/div64.h> - -#include <linux/statfs.h> - -#define UnlockPage(p) unlock_page(p) -#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags) - -#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf) - -#define YPROC_ROOT NULL - -#define Y_INIT_TIMER(a) init_timer_on_stack(a) - -#define WRITE_SIZE_STR "writesize" -#define WRITE_SIZE(mtd) ((mtd)->writesize) - -static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size) -{ - uint64_t result = partition_size; - do_div(result, block_size); - return (uint32_t) result; -} - -#include <linux/uaccess.h> -#include <linux/mtd/mtd.h> - -#include "yportenv.h" -#include "yaffs_trace.h" -#include "yaffs_guts.h" -#include "yaffs_attribs.h" - -#include "yaffs_linux.h" - -#include "yaffs_mtdif.h" -#include "yaffs_mtdif1.h" -#include "yaffs_mtdif2.h" - -unsigned int yaffs_trace_mask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS; -unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS; -unsigned int yaffs_auto_checkpoint = 1; -unsigned int yaffs_gc_control = 1; -unsigned int yaffs_bg_enable = 1; - -/* Module Parameters */ -module_param(yaffs_trace_mask, uint, 0644); -module_param(yaffs_wr_attempts, uint, 0644); -module_param(yaffs_auto_checkpoint, uint, 0644); -module_param(yaffs_gc_control, uint, 0644); -module_param(yaffs_bg_enable, uint, 0644); - - -#define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private) -#define yaffs_inode_to_obj(iptr) ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr))) -#define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode) -#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->s_fs_info) - -#define update_dir_time(dir) do {\ - (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \ - } while(0) - - -static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev) -{ - return yaffs_gc_control; -} - -static void yaffs_gross_lock(struct yaffs_dev *dev) -{ - yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current); - mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock)); - yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current); -} - -static void yaffs_gross_unlock(struct yaffs_dev *dev) -{ - yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current); - mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock)); -} - -static void yaffs_fill_inode_from_obj(struct inode *inode, - struct yaffs_obj *obj); - -static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino) -{ - struct inode *inode; - struct yaffs_obj *obj; - struct yaffs_dev *dev = yaffs_super_to_dev(sb); - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino); - - inode = iget_locked(sb, ino); - if (!inode) - return ERR_PTR(-ENOMEM); - if (!(inode->i_state & I_NEW)) - return inode; - - /* NB This is called as a side effect of other functions, but - * we had to release the lock to prevent deadlocks, so - * need to lock again. - */ - - yaffs_gross_lock(dev); - - obj = yaffs_find_by_number(dev, inode->i_ino); - - yaffs_fill_inode_from_obj(inode, obj); - - yaffs_gross_unlock(dev); - - unlock_new_inode(inode); - return inode; -} - -struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, - struct yaffs_obj *obj) -{ - struct inode *inode; - - if (!sb) { - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_get_inode for NULL super_block!!"); - return NULL; - - } - - if (!obj) { - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_get_inode for NULL object!!"); - return NULL; - - } - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_get_inode for object %d", - obj->obj_id); - - inode = yaffs_iget(sb, obj->obj_id); - if (IS_ERR(inode)) - return NULL; - - /* NB Side effect: iget calls back to yaffs_read_inode(). */ - /* iget also increments the inode's i_count */ - /* NB You can't be holding gross_lock or deadlock will happen! */ - - return inode; -} - -static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, - dev_t rdev) -{ - struct inode *inode; - - struct yaffs_obj *obj = NULL; - struct yaffs_dev *dev; - - struct yaffs_obj *parent = yaffs_inode_to_obj(dir); - - int error = -ENOSPC; - uid_t uid = current->cred->fsuid; - gid_t gid = - (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid; - - if ((dir->i_mode & S_ISGID) && S_ISDIR(mode)) - mode |= S_ISGID; - - if (parent) { - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_mknod: parent object %d type %d", - parent->obj_id, parent->variant_type); - } else { - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_mknod: could not get parent object"); - return -EPERM; - } - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_mknod: making oject for %s, mode %x dev %x", - dentry->d_name.name, mode, rdev); - - dev = parent->my_dev; - - yaffs_gross_lock(dev); - - switch (mode & S_IFMT) { - default: - /* Special (socket, fifo, device...) */ - yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special"); - obj = - yaffs_create_special(parent, dentry->d_name.name, mode, uid, - gid, old_encode_dev(rdev)); - break; - case S_IFREG: /* file */ - yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file"); - obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid, - gid); - break; - case S_IFDIR: /* directory */ - yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory"); - obj = yaffs_create_dir(parent, dentry->d_name.name, mode, - uid, gid); - break; - case S_IFLNK: /* symlink */ - yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink"); - obj = NULL; /* Do we ever get here? */ - break; - } - - /* Can not call yaffs_get_inode() with gross lock held */ - yaffs_gross_unlock(dev); - - if (obj) { - inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj); - d_instantiate(dentry, inode); - update_dir_time(dir); - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_mknod created object %d count = %d", - obj->obj_id, atomic_read(&inode->i_count)); - error = 0; - yaffs_fill_inode_from_obj(dir, parent); - } else { - yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object"); - error = -ENOMEM; - } - - return error; -} - -static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode) -{ - return yaffs_mknod(dir, dentry, mode | S_IFDIR, 0); -} - -static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *n) -{ - return yaffs_mknod(dir, dentry, mode | S_IFREG, 0); -} - -static int yaffs_link(struct dentry *old_dentry, struct inode *dir, - struct dentry *dentry) -{ - struct inode *inode = old_dentry->d_inode; - struct yaffs_obj *obj = NULL; - struct yaffs_obj *link = NULL; - struct yaffs_dev *dev; - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_link"); - - obj = yaffs_inode_to_obj(inode); - dev = obj->my_dev; - - yaffs_gross_lock(dev); - - if (!S_ISDIR(inode->i_mode)) /* Don't link directories */ - link = - yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name, - obj); - - if (link) { - old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(obj); - d_instantiate(dentry, old_dentry->d_inode); - atomic_inc(&old_dentry->d_inode->i_count); - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_link link count %d i_count %d", - old_dentry->d_inode->i_nlink, - atomic_read(&old_dentry->d_inode->i_count)); - } - - yaffs_gross_unlock(dev); - - if (link) { - update_dir_time(dir); - return 0; - } - - return -EPERM; -} - -static int yaffs_symlink(struct inode *dir, struct dentry *dentry, - const char *symname) -{ - struct yaffs_obj *obj; - struct yaffs_dev *dev; - uid_t uid = current->cred->fsuid; - gid_t gid = - (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid; - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink"); - - dev = yaffs_inode_to_obj(dir)->my_dev; - yaffs_gross_lock(dev); - obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name, - S_IFLNK | S_IRWXUGO, uid, gid, symname); - yaffs_gross_unlock(dev); - - if (obj) { - struct inode *inode; - - inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); - d_instantiate(dentry, inode); - update_dir_time(dir); - yaffs_trace(YAFFS_TRACE_OS, "symlink created OK"); - return 0; - } else { - yaffs_trace(YAFFS_TRACE_OS, "symlink not created"); - } - - return -ENOMEM; -} - -static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, - struct nameidata *n) -{ - struct yaffs_obj *obj; - struct inode *inode = NULL; - - struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev; - - if (current != yaffs_dev_to_lc(dev)->readdir_process) - yaffs_gross_lock(dev); - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_lookup for %d:%s", - yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name); - - obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name); - - obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */ - - /* Can't hold gross lock when calling yaffs_get_inode() */ - if (current != yaffs_dev_to_lc(dev)->readdir_process) - yaffs_gross_unlock(dev); - - if (obj) { - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_lookup found %d", obj->obj_id); - - inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); - - if (inode) { - yaffs_trace(YAFFS_TRACE_OS, "yaffs_loookup dentry"); - d_add(dentry, inode); - /* return dentry; */ - return NULL; - } - - } else { - yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found"); - - } - - d_add(dentry, inode); - - return NULL; -} - -static int yaffs_unlink(struct inode *dir, struct dentry *dentry) -{ - int ret_val; - - struct yaffs_dev *dev; - struct yaffs_obj *obj; - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_unlink %d:%s", - (int)(dir->i_ino), dentry->d_name.name); - obj = yaffs_inode_to_obj(dir); - dev = obj->my_dev; - - yaffs_gross_lock(dev); - - ret_val = yaffs_unlinker(obj, dentry->d_name.name); - - if (ret_val == YAFFS_OK) { - dentry->d_inode->i_nlink--; - dir->i_version++; - yaffs_gross_unlock(dev); - mark_inode_dirty(dentry->d_inode); - update_dir_time(dir); - return 0; - } - yaffs_gross_unlock(dev); - return -ENOTEMPTY; -} - -static int yaffs_sync_object(struct file *file, int datasync) -{ - - struct yaffs_obj *obj; - struct yaffs_dev *dev; - struct dentry *dentry = file->f_path.dentry; - - obj = yaffs_dentry_to_obj(dentry); - - dev = obj->my_dev; - - yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, "yaffs_sync_object"); - yaffs_gross_lock(dev); - yaffs_flush_file(obj, 1, datasync); - yaffs_gross_unlock(dev); - return 0; -} -/* - * The VFS layer already does all the dentry stuff for rename. - * - * NB: POSIX says you can rename an object over an old object of the same name - */ -static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry) -{ - struct yaffs_dev *dev; - int ret_val = YAFFS_FAIL; - struct yaffs_obj *target; - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename"); - dev = yaffs_inode_to_obj(old_dir)->my_dev; - - yaffs_gross_lock(dev); - - /* Check if the target is an existing directory that is not empty. */ - target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir), - new_dentry->d_name.name); - - if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY && - !list_empty(&target->variant.dir_variant.children)) { - - yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir"); - - ret_val = YAFFS_FAIL; - } else { - /* Now does unlinking internally using shadowing mechanism */ - yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj"); - - ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir), - old_dentry->d_name.name, - yaffs_inode_to_obj(new_dir), - new_dentry->d_name.name); - } - yaffs_gross_unlock(dev); - - if (ret_val == YAFFS_OK) { - if (target) { - new_dentry->d_inode->i_nlink--; - mark_inode_dirty(new_dentry->d_inode); - } - - update_dir_time(old_dir); - if (old_dir != new_dir) - update_dir_time(new_dir); - return 0; - } else { - return -ENOTEMPTY; - } -} - -static int yaffs_setattr(struct dentry *dentry, struct iattr *attr) -{ - struct inode *inode = dentry->d_inode; - int error = 0; - struct yaffs_dev *dev; - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_setattr of object %d", - yaffs_inode_to_obj(inode)->obj_id); - - /* Fail if a requested resize >= 2GB */ - if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31)) - error = -EINVAL; - - if (error == 0) - error = inode_change_ok(inode, attr); - if (error == 0) { - int result; - if (!error) { - setattr_copy(inode, attr); - yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called"); - if (attr->ia_valid & ATTR_SIZE) { - truncate_setsize(inode, attr->ia_size); - inode->i_blocks = (inode->i_size + 511) >> 9; - } - } - dev = yaffs_inode_to_obj(inode)->my_dev; - if (attr->ia_valid & ATTR_SIZE) { - yaffs_trace(YAFFS_TRACE_OS, "resize to %d(%x)", - (int)(attr->ia_size), - (int)(attr->ia_size)); - } - yaffs_gross_lock(dev); - result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr); - if (result == YAFFS_OK) { - error = 0; - } else { - error = -EPERM; - } - yaffs_gross_unlock(dev); - - } - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error); - - return error; -} - -#ifdef CONFIG_YAFFS_XATTR -static int yaffs_setxattr(struct dentry *dentry, const char *name, - const void *value, size_t size, int flags) -{ - struct inode *inode = dentry->d_inode; - int error = 0; - struct yaffs_dev *dev; - struct yaffs_obj *obj = yaffs_inode_to_obj(inode); - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id); - - if (error == 0) { - int result; - dev = obj->my_dev; - yaffs_gross_lock(dev); - result = yaffs_set_xattrib(obj, name, value, size, flags); - if (result == YAFFS_OK) - error = 0; - else if (result < 0) - error = result; - yaffs_gross_unlock(dev); - - } - yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error); - - return error; -} - -static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name, void *buff, - size_t size) -{ - struct inode *inode = dentry->d_inode; - int error = 0; - struct yaffs_dev *dev; - struct yaffs_obj *obj = yaffs_inode_to_obj(inode); - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_getxattr \"%s\" from object %d", - name, obj->obj_id); - - if (error == 0) { - dev = obj->my_dev; - yaffs_gross_lock(dev); - error = yaffs_get_xattrib(obj, name, buff, size); - yaffs_gross_unlock(dev); - - } - yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error); - - return error; -} - -static int yaffs_removexattr(struct dentry *dentry, const char *name) -{ - struct inode *inode = dentry->d_inode; - int error = 0; - struct yaffs_dev *dev; - struct yaffs_obj *obj = yaffs_inode_to_obj(inode); - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_removexattr of object %d", obj->obj_id); - - if (error == 0) { - int result; - dev = obj->my_dev; - yaffs_gross_lock(dev); - result = yaffs_remove_xattrib(obj, name); - if (result == YAFFS_OK) - error = 0; - else if (result < 0) - error = result; - yaffs_gross_unlock(dev); - - } - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_removexattr done returning %d", error); - - return error; -} - -static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size) -{ - struct inode *inode = dentry->d_inode; - int error = 0; - struct yaffs_dev *dev; - struct yaffs_obj *obj = yaffs_inode_to_obj(inode); - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_listxattr of object %d", obj->obj_id); - - if (error == 0) { - dev = obj->my_dev; - yaffs_gross_lock(dev); - error = yaffs_list_xattrib(obj, buff, size); - yaffs_gross_unlock(dev); - - } - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_listxattr done returning %d", error); - - return error; -} - -#endif - -static const struct inode_operations yaffs_dir_inode_operations = { - .create = yaffs_create, - .lookup = yaffs_lookup, - .link = yaffs_link, - .unlink = yaffs_unlink, - .symlink = yaffs_symlink, - .mkdir = yaffs_mkdir, - .rmdir = yaffs_unlink, - .mknod = yaffs_mknod, - .rename = yaffs_rename, - .setattr = yaffs_setattr, -#ifdef CONFIG_YAFFS_XATTR - .setxattr = yaffs_setxattr, - .getxattr = yaffs_getxattr, - .listxattr = yaffs_listxattr, - .removexattr = yaffs_removexattr, -#endif -}; -/*-----------------------------------------------------------------*/ -/* Directory search context allows us to unlock access to yaffs during - * filldir without causing problems with the directory being modified. - * This is similar to the tried and tested mechanism used in yaffs direct. - * - * A search context iterates along a doubly linked list of siblings in the - * directory. If the iterating object is deleted then this would corrupt - * the list iteration, likely causing a crash. The search context avoids - * this by using the remove_obj_fn to move the search context to the - * next object before the object is deleted. - * - * Many readdirs (and thus seach conexts) may be alive simulateously so - * each struct yaffs_dev has a list of these. - * - * A seach context lives for the duration of a readdir. - * - * All these functions must be called while yaffs is locked. - */ - -struct yaffs_search_context { - struct yaffs_dev *dev; - struct yaffs_obj *dir_obj; - struct yaffs_obj *next_return; - struct list_head others; -}; - -/* - * yaffs_new_search() creates a new search context, initialises it and - * adds it to the device's search context list. - * - * Called at start of readdir. - */ -static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir) -{ - struct yaffs_dev *dev = dir->my_dev; - struct yaffs_search_context *sc = - kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS); - if (sc) { - sc->dir_obj = dir; - sc->dev = dev; - if (list_empty(&sc->dir_obj->variant.dir_variant.children)) - sc->next_return = NULL; - else - sc->next_return = - list_entry(dir->variant.dir_variant.children.next, - struct yaffs_obj, siblings); - INIT_LIST_HEAD(&sc->others); - list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts)); - } - return sc; -} - -/* - * yaffs_search_end() disposes of a search context and cleans up. - */ -static void yaffs_search_end(struct yaffs_search_context *sc) -{ - if (sc) { - list_del(&sc->others); - kfree(sc); - } -} - -/* - * yaffs_search_advance() moves a search context to the next object. - * Called when the search iterates or when an object removal causes - * the search context to be moved to the next object. - */ -static void yaffs_search_advance(struct yaffs_search_context *sc) -{ - if (!sc) - return; - - if (sc->next_return == NULL || - list_empty(&sc->dir_obj->variant.dir_variant.children)) - sc->next_return = NULL; - else { - struct list_head *next = sc->next_return->siblings.next; - - if (next == &sc->dir_obj->variant.dir_variant.children) - sc->next_return = NULL; /* end of list */ - else - sc->next_return = - list_entry(next, struct yaffs_obj, siblings); - } -} - -/* - * yaffs_remove_obj_callback() is called when an object is unlinked. - * We check open search contexts and advance any which are currently - * on the object being iterated. - */ -static void yaffs_remove_obj_callback(struct yaffs_obj *obj) -{ - - struct list_head *i; - struct yaffs_search_context *sc; - struct list_head *search_contexts = - &(yaffs_dev_to_lc(obj->my_dev)->search_contexts); - - /* Iterate through the directory search contexts. - * If any are currently on the object being removed, then advance - * the search context to the next object to prevent a hanging pointer. - */ - list_for_each(i, search_contexts) { - if (i) { - sc = list_entry(i, struct yaffs_search_context, others); - if (sc->next_return == obj) - yaffs_search_advance(sc); - } - } - -} - -static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) -{ - struct yaffs_obj *obj; - struct yaffs_dev *dev; - struct yaffs_search_context *sc; - struct inode *inode = f->f_dentry->d_inode; - unsigned long offset, curoffs; - struct yaffs_obj *l; - int ret_val = 0; - - char name[YAFFS_MAX_NAME_LENGTH + 1]; - - obj = yaffs_dentry_to_obj(f->f_dentry); - dev = obj->my_dev; - - yaffs_gross_lock(dev); - - yaffs_dev_to_lc(dev)->readdir_process = current; - - offset = f->f_pos; - - sc = yaffs_new_search(obj); - if (!sc) { - ret_val = -ENOMEM; - goto out; - } - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_readdir: starting at %d", (int)offset); - - if (offset == 0) { - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_readdir: entry . ino %d", - (int)inode->i_ino); - yaffs_gross_unlock(dev); - if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) { - yaffs_gross_lock(dev); - goto out; - } - yaffs_gross_lock(dev); - offset++; - f->f_pos++; - } - if (offset == 1) { - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_readdir: entry .. ino %d", - (int)f->f_dentry->d_parent->d_inode->i_ino); - yaffs_gross_unlock(dev); - if (filldir(dirent, "..", 2, offset, - f->f_dentry->d_parent->d_inode->i_ino, - DT_DIR) < 0) { - yaffs_gross_lock(dev); - goto out; - } - yaffs_gross_lock(dev); - offset++; - f->f_pos++; - } - - curoffs = 1; - - /* If the directory has changed since the open or last call to - readdir, rewind to after the 2 canned entries. */ - if (f->f_version != inode->i_version) { - offset = 2; - f->f_pos = offset; - f->f_version = inode->i_version; - } - - while (sc->next_return) { - curoffs++; - l = sc->next_return; - if (curoffs >= offset) { - int this_inode = yaffs_get_obj_inode(l); - int this_type = yaffs_get_obj_type(l); - - yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1); - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_readdir: %s inode %d", - name, yaffs_get_obj_inode(l)); - - yaffs_gross_unlock(dev); - - if (filldir(dirent, - name, - strlen(name), - offset, this_inode, this_type) < 0) { - yaffs_gross_lock(dev); - goto out; - } - - yaffs_gross_lock(dev); - - offset++; - f->f_pos++; - } - yaffs_search_advance(sc); - } - -out: - yaffs_search_end(sc); - yaffs_dev_to_lc(dev)->readdir_process = NULL; - yaffs_gross_unlock(dev); - - return ret_val; -} - -static const struct file_operations yaffs_dir_operations = { - .read = generic_read_dir, - .readdir = yaffs_readdir, - .fsync = yaffs_sync_object, - .llseek = generic_file_llseek, -}; - - - -static int yaffs_file_flush(struct file *file, fl_owner_t id) -{ - struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry); - - struct yaffs_dev *dev = obj->my_dev; - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_file_flush object %d (%s)", - obj->obj_id, obj->dirty ? "dirty" : "clean"); - - yaffs_gross_lock(dev); - - yaffs_flush_file(obj, 1, 0); - - yaffs_gross_unlock(dev); - - return 0; -} - -static const struct file_operations yaffs_file_operations = { - .read = do_sync_read, - .write = do_sync_write, - .aio_read = generic_file_aio_read, - .aio_write = generic_file_aio_write, - .mmap = generic_file_mmap, - .flush = yaffs_file_flush, - .fsync = yaffs_sync_object, - .splice_read = generic_file_splice_read, - .splice_write = generic_file_splice_write, - .llseek = generic_file_llseek, -}; - - -/* ExportFS support */ -static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, - uint32_t generation) -{ - return yaffs_iget(sb, ino); -} - -static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb, - struct fid *fid, int fh_len, - int fh_type) -{ - return generic_fh_to_dentry(sb, fid, fh_len, fh_type, - yaffs2_nfs_get_inode); -} - -static struct dentry *yaffs2_fh_to_parent(struct super_block *sb, - struct fid *fid, int fh_len, - int fh_type) -{ - return generic_fh_to_parent(sb, fid, fh_len, fh_type, - yaffs2_nfs_get_inode); -} - -struct dentry *yaffs2_get_parent(struct dentry *dentry) -{ - - struct super_block *sb = dentry->d_inode->i_sb; - struct dentry *parent = ERR_PTR(-ENOENT); - struct inode *inode; - unsigned long parent_ino; - struct yaffs_obj *d_obj; - struct yaffs_obj *parent_obj; - - d_obj = yaffs_inode_to_obj(dentry->d_inode); - - if (d_obj) { - parent_obj = d_obj->parent; - if (parent_obj) { - parent_ino = yaffs_get_obj_inode(parent_obj); - inode = yaffs_iget(sb, parent_ino); - - if (IS_ERR(inode)) { - parent = ERR_CAST(inode); - } else { - parent = d_obtain_alias(inode); - if (!IS_ERR(parent)) { - parent = ERR_PTR(-ENOMEM); - iput(inode); - } - } - } - } - - return parent; -} - -/* Just declare a zero structure as a NULL value implies - * using the default functions of exportfs. - */ - -static struct export_operations yaffs_export_ops = { - .fh_to_dentry = yaffs2_fh_to_dentry, - .fh_to_parent = yaffs2_fh_to_parent, - .get_parent = yaffs2_get_parent, -}; - - -/*-----------------------------------------------------------------*/ - -static int yaffs_readlink(struct dentry *dentry, char __user * buffer, - int buflen) -{ - unsigned char *alias; - int ret; - - struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; - - yaffs_gross_lock(dev); - - alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry)); - - yaffs_gross_unlock(dev); - - if (!alias) - return -ENOMEM; - - ret = vfs_readlink(dentry, buffer, buflen, alias); - kfree(alias); - return ret; -} - -static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) -{ - unsigned char *alias; - void *ret; - struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; - - yaffs_gross_lock(dev); - - alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry)); - yaffs_gross_unlock(dev); - - if (!alias) { - ret = ERR_PTR(-ENOMEM); - goto out; - } - - nd_set_link(nd, alias); - ret = (void *)alias; -out: - return ret; -} - -void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias) -{ - kfree(alias); -} - - -static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj) -{ - /* Clear the association between the inode and - * the struct yaffs_obj. - */ - obj->my_inode = NULL; - yaffs_inode_to_obj_lv(inode) = NULL; - - /* If the object freeing was deferred, then the real - * free happens now. - * This should fix the inode inconsistency problem. - */ - yaffs_handle_defered_free(obj); -} - -/* yaffs_evict_inode combines into one operation what was previously done in - * yaffs_clear_inode() and yaffs_delete_inode() - * - */ -static void yaffs_evict_inode(struct inode *inode) -{ - struct yaffs_obj *obj; - struct yaffs_dev *dev; - int deleteme = 0; - - obj = yaffs_inode_to_obj(inode); - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_evict_inode: ino %d, count %d %s", - (int)inode->i_ino, - atomic_read(&inode->i_count), - obj ? "object exists" : "null object"); - - if (!inode->i_nlink && !is_bad_inode(inode)) - deleteme = 1; - truncate_inode_pages(&inode->i_data, 0); - end_writeback(inode); - - if (deleteme && obj) { - dev = obj->my_dev; - yaffs_gross_lock(dev); - yaffs_del_obj(obj); - yaffs_gross_unlock(dev); - } - if (obj) { - dev = obj->my_dev; - yaffs_gross_lock(dev); - yaffs_unstitch_obj(inode, obj); - yaffs_gross_unlock(dev); - } - -} - -static void yaffs_touch_super(struct yaffs_dev *dev) -{ - struct super_block *sb = yaffs_dev_to_lc(dev)->super; - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_touch_super() sb = %p", sb); - if (sb) - sb->s_dirt = 1; -} - -static int yaffs_readpage_nolock(struct file *f, struct page *pg) -{ - /* Lifted from jffs2 */ - - struct yaffs_obj *obj; - unsigned char *pg_buf; - int ret; - - struct yaffs_dev *dev; - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_readpage_nolock at %08x, size %08x", - (unsigned)(pg->index << PAGE_CACHE_SHIFT), - (unsigned)PAGE_CACHE_SIZE); - - obj = yaffs_dentry_to_obj(f->f_dentry); - - dev = obj->my_dev; - - BUG_ON(!PageLocked(pg)); - - pg_buf = kmap(pg); - /* FIXME: Can kmap fail? */ - - yaffs_gross_lock(dev); - - ret = yaffs_file_rd(obj, pg_buf, - pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE); - - yaffs_gross_unlock(dev); - - if (ret >= 0) - ret = 0; - - if (ret) { - ClearPageUptodate(pg); - SetPageError(pg); - } else { - SetPageUptodate(pg); - ClearPageError(pg); - } - - flush_dcache_page(pg); - kunmap(pg); - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done"); - return ret; -} - -static int yaffs_readpage_unlock(struct file *f, struct page *pg) -{ - int ret = yaffs_readpage_nolock(f, pg); - UnlockPage(pg); - return ret; -} - -static int yaffs_readpage(struct file *f, struct page *pg) -{ - int ret; - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage"); - ret = yaffs_readpage_unlock(f, pg); - yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done"); - return ret; -} - -/* writepage inspired by/stolen from smbfs */ - -static int yaffs_writepage(struct page *page, struct writeback_control *wbc) -{ - struct yaffs_dev *dev; - struct address_space *mapping = page->mapping; - struct inode *inode; - unsigned long end_index; - char *buffer; - struct yaffs_obj *obj; - int n_written = 0; - unsigned n_bytes; - loff_t i_size; - - if (!mapping) - BUG(); - inode = mapping->host; - if (!inode) - BUG(); - i_size = i_size_read(inode); - - end_index = i_size >> PAGE_CACHE_SHIFT; - - if (page->index < end_index) - n_bytes = PAGE_CACHE_SIZE; - else { - n_bytes = i_size & (PAGE_CACHE_SIZE - 1); - - if (page->index > end_index || !n_bytes) { - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_writepage at %08x, inode size = %08x!!!", - (unsigned)(page->index << PAGE_CACHE_SHIFT), - (unsigned)inode->i_size); - yaffs_trace(YAFFS_TRACE_OS, - " -> don't care!!"); - - zero_user_segment(page, 0, PAGE_CACHE_SIZE); - set_page_writeback(page); - unlock_page(page); - end_page_writeback(page); - return 0; - } - } - - if (n_bytes != PAGE_CACHE_SIZE) - zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE); - - get_page(page); - - buffer = kmap(page); - - obj = yaffs_inode_to_obj(inode); - dev = obj->my_dev; - yaffs_gross_lock(dev); - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_writepage at %08x, size %08x", - (unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes); - yaffs_trace(YAFFS_TRACE_OS, - "writepag0: obj = %05x, ino = %05x", - (int)obj->variant.file_variant.file_size, (int)inode->i_size); - - n_written = yaffs_wr_file(obj, buffer, - page->index << PAGE_CACHE_SHIFT, n_bytes, 0); - - yaffs_touch_super(dev); - - yaffs_trace(YAFFS_TRACE_OS, - "writepag1: obj = %05x, ino = %05x", - (int)obj->variant.file_variant.file_size, (int)inode->i_size); - - yaffs_gross_unlock(dev); - - kunmap(page); - set_page_writeback(page); - unlock_page(page); - end_page_writeback(page); - put_page(page); - - return (n_written == n_bytes) ? 0 : -ENOSPC; -} - -/* Space holding and freeing is done to ensure we have space available for - * write_begin/end. - * For now we just assume few parallel writes and check against a small - * number. - * Todo: need to do this with a counter to handle parallel reads better. - */ - -static ssize_t yaffs_hold_space(struct file *f) -{ - struct yaffs_obj *obj; - struct yaffs_dev *dev; - - int n_free_chunks; - - obj = yaffs_dentry_to_obj(f->f_dentry); - - dev = obj->my_dev; - - yaffs_gross_lock(dev); - - n_free_chunks = yaffs_get_n_free_chunks(dev); - - yaffs_gross_unlock(dev); - - return (n_free_chunks > 20) ? 1 : 0; -} - -static void yaffs_release_space(struct file *f) -{ - struct yaffs_obj *obj; - struct yaffs_dev *dev; - - obj = yaffs_dentry_to_obj(f->f_dentry); - - dev = obj->my_dev; - - yaffs_gross_lock(dev); - - yaffs_gross_unlock(dev); -} - -static int yaffs_write_begin(struct file *filp, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) -{ - struct page *pg = NULL; - pgoff_t index = pos >> PAGE_CACHE_SHIFT; - - int ret = 0; - int space_held = 0; - - /* Get a page */ - pg = grab_cache_page_write_begin(mapping, index, flags); - - *pagep = pg; - if (!pg) { - ret = -ENOMEM; - goto out; - } - yaffs_trace(YAFFS_TRACE_OS, - "start yaffs_write_begin index %d(%x) uptodate %d", - (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0); - - /* Get fs space */ - space_held = yaffs_hold_space(filp); - - if (!space_held) { - ret = -ENOSPC; - goto out; - } - - /* Update page if required */ - - if (!Page_Uptodate(pg)) - ret = yaffs_readpage_nolock(filp, pg); - - if (ret) - goto out; - - /* Happy path return */ - yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok"); - - return 0; - -out: - yaffs_trace(YAFFS_TRACE_OS, - "end yaffs_write_begin fail returning %d", ret); - if (space_held) - yaffs_release_space(filp); - if (pg) { - unlock_page(pg); - page_cache_release(pg); - } - return ret; -} - -static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, - loff_t * pos) -{ - struct yaffs_obj *obj; - int n_written, ipos; - struct inode *inode; - struct yaffs_dev *dev; - - obj = yaffs_dentry_to_obj(f->f_dentry); - - dev = obj->my_dev; - - yaffs_gross_lock(dev); - - inode = f->f_dentry->d_inode; - - if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) - ipos = inode->i_size; - else - ipos = *pos; - - if (!obj) - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_file_write: hey obj is null!"); - else - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_file_write about to write writing %u(%x) bytes to object %d at %d(%x)", - (unsigned)n, (unsigned)n, obj->obj_id, ipos, ipos); - - n_written = yaffs_wr_file(obj, buf, ipos, n, 0); - - yaffs_touch_super(dev); - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_file_write: %d(%x) bytes written", - (unsigned)n, (unsigned)n); - - if (n_written > 0) { - ipos += n_written; - *pos = ipos; - if (ipos > inode->i_size) { - inode->i_size = ipos; - inode->i_blocks = (ipos + 511) >> 9; - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_file_write size updated to %d bytes, %d blocks", - ipos, (int)(inode->i_blocks)); - } - - } - yaffs_gross_unlock(dev); - return (n_written == 0) && (n > 0) ? -ENOSPC : n_written; -} - -static int yaffs_write_end(struct file *filp, struct address_space *mapping, - loff_t pos, unsigned len, unsigned copied, - struct page *pg, void *fsdadata) -{ - int ret = 0; - void *addr, *kva; - uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1); - - kva = kmap(pg); - addr = kva + offset_into_page; - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_write_end addr %p pos %x n_bytes %d", - addr, (unsigned)pos, copied); - - ret = yaffs_file_write(filp, addr, copied, &pos); - - if (ret != copied) { - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_write_end not same size ret %d copied %d", - ret, copied); - SetPageError(pg); - } - - kunmap(pg); - - yaffs_release_space(filp); - unlock_page(pg); - page_cache_release(pg); - return ret; -} - -static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf) -{ - struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; - struct super_block *sb = dentry->d_sb; - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs"); - - yaffs_gross_lock(dev); - - buf->f_type = YAFFS_MAGIC; - buf->f_bsize = sb->s_blocksize; - buf->f_namelen = 255; - - if (dev->data_bytes_per_chunk & (dev->data_bytes_per_chunk - 1)) { - /* Do this if chunk size is not a power of 2 */ - - uint64_t bytes_in_dev; - uint64_t bytes_free; - - bytes_in_dev = - ((uint64_t) - ((dev->param.end_block - dev->param.start_block + - 1))) * ((uint64_t) (dev->param.chunks_per_block * - dev->data_bytes_per_chunk)); - - do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */ - buf->f_blocks = bytes_in_dev; - - bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) * - ((uint64_t) (dev->data_bytes_per_chunk)); - - do_div(bytes_free, sb->s_blocksize); - - buf->f_bfree = bytes_free; - - } else if (sb->s_blocksize > dev->data_bytes_per_chunk) { - - buf->f_blocks = - (dev->param.end_block - dev->param.start_block + 1) * - dev->param.chunks_per_block / - (sb->s_blocksize / dev->data_bytes_per_chunk); - buf->f_bfree = - yaffs_get_n_free_chunks(dev) / - (sb->s_blocksize / dev->data_bytes_per_chunk); - } else { - buf->f_blocks = - (dev->param.end_block - dev->param.start_block + 1) * - dev->param.chunks_per_block * - (dev->data_bytes_per_chunk / sb->s_blocksize); - - buf->f_bfree = - yaffs_get_n_free_chunks(dev) * - (dev->data_bytes_per_chunk / sb->s_blocksize); - } - - buf->f_files = 0; - buf->f_ffree = 0; - buf->f_bavail = buf->f_bfree; - - yaffs_gross_unlock(dev); - return 0; -} - -static void yaffs_flush_inodes(struct super_block *sb) -{ - struct inode *iptr; - struct yaffs_obj *obj; - - list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) { - obj = yaffs_inode_to_obj(iptr); - if (obj) { - yaffs_trace(YAFFS_TRACE_OS, - "flushing obj %d", obj->obj_id); - yaffs_flush_file(obj, 1, 0); - } - } -} - -static void yaffs_flush_super(struct super_block *sb, int do_checkpoint) -{ - struct yaffs_dev *dev = yaffs_super_to_dev(sb); - if (!dev) - return; - - yaffs_flush_inodes(sb); - yaffs_update_dirty_dirs(dev); - yaffs_flush_whole_cache(dev); - if (do_checkpoint) - yaffs_checkpoint_save(dev); -} - -static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev) -{ - unsigned erased_chunks = - dev->n_erased_blocks * dev->param.chunks_per_block; - struct yaffs_linux_context *context = yaffs_dev_to_lc(dev); - unsigned scattered = 0; /* Free chunks not in an erased block */ - - if (erased_chunks < dev->n_free_chunks) - scattered = (dev->n_free_chunks - erased_chunks); - - if (!context->bg_running) - return 0; - else if (scattered < (dev->param.chunks_per_block * 2)) - return 0; - else if (erased_chunks > dev->n_free_chunks / 2) - return 0; - else if (erased_chunks > dev->n_free_chunks / 4) - return 1; - else - return 2; -} - -static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint) -{ - - struct yaffs_dev *dev = yaffs_super_to_dev(sb); - unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4); - unsigned gc_urgent = yaffs_bg_gc_urgency(dev); - int do_checkpoint; - - yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, - "yaffs_do_sync_fs: gc-urgency %d %s %s%s", - gc_urgent, - sb->s_dirt ? "dirty" : "clean", - request_checkpoint ? "checkpoint requested" : "no checkpoint", - oneshot_checkpoint ? " one-shot" : ""); - - yaffs_gross_lock(dev); - do_checkpoint = ((request_checkpoint && !gc_urgent) || - oneshot_checkpoint) && !dev->is_checkpointed; - - if (sb->s_dirt || do_checkpoint) { - yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint); - sb->s_dirt = 0; - if (oneshot_checkpoint) - yaffs_auto_checkpoint &= ~4; - } - yaffs_gross_unlock(dev); - - return 0; -} - -/* - * yaffs background thread functions . - * yaffs_bg_thread_fn() the thread function - * yaffs_bg_start() launches the background thread. - * yaffs_bg_stop() cleans up the background thread. - * - * NB: - * The thread should only run after the yaffs is initialised - * The thread should be stopped before yaffs is unmounted. - * The thread should not do any writing while the fs is in read only. - */ - -void yaffs_background_waker(unsigned long data) -{ - wake_up_process((struct task_struct *)data); -} - -static int yaffs_bg_thread_fn(void *data) -{ - struct yaffs_dev *dev = (struct yaffs_dev *)data; - struct yaffs_linux_context *context = yaffs_dev_to_lc(dev); - unsigned long now = jiffies; - unsigned long next_dir_update = now; - unsigned long next_gc = now; - unsigned long expires; - unsigned int urgency; - - int gc_result; - struct timer_list timer; - - yaffs_trace(YAFFS_TRACE_BACKGROUND, - "yaffs_background starting for dev %p", (void *)dev); - - set_freezable(); - while (context->bg_running) { - yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background"); - - if (kthread_should_stop()) - break; - - if (try_to_freeze()) - continue; - - yaffs_gross_lock(dev); - - now = jiffies; - - if (time_after(now, next_dir_update) && yaffs_bg_enable) { - yaffs_update_dirty_dirs(dev); - next_dir_update = now + HZ; - } - - if (time_after(now, next_gc) && yaffs_bg_enable) { - if (!dev->is_checkpointed) { - urgency = yaffs_bg_gc_urgency(dev); - gc_result = yaffs_bg_gc(dev, urgency); - if (urgency > 1) - next_gc = now + HZ / 20 + 1; - else if (urgency > 0) - next_gc = now + HZ / 10 + 1; - else - next_gc = now + HZ * 2; - } else { - /* - * gc not running so set to next_dir_update - * to cut down on wake ups - */ - next_gc = next_dir_update; - } - } - yaffs_gross_unlock(dev); - expires = next_dir_update; - if (time_before(next_gc, expires)) - expires = next_gc; - if (time_before(expires, now)) - expires = now + HZ; - - Y_INIT_TIMER(&timer); - timer.expires = expires + 1; - timer.data = (unsigned long)current; - timer.function = yaffs_background_waker; - - set_current_state(TASK_INTERRUPTIBLE); - add_timer(&timer); - schedule(); - del_timer_sync(&timer); - } - - return 0; -} - -static int yaffs_bg_start(struct yaffs_dev *dev) -{ - int retval = 0; - struct yaffs_linux_context *context = yaffs_dev_to_lc(dev); - - if (dev->read_only) - return -1; - - context->bg_running = 1; - - context->bg_thread = kthread_run(yaffs_bg_thread_fn, - (void *)dev, "yaffs-bg-%d", - context->mount_id); - - if (IS_ERR(context->bg_thread)) { - retval = PTR_ERR(context->bg_thread); - context->bg_thread = NULL; - context->bg_running = 0; - } - return retval; -} - -static void yaffs_bg_stop(struct yaffs_dev *dev) -{ - struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev); - - ctxt->bg_running = 0; - - if (ctxt->bg_thread) { - kthread_stop(ctxt->bg_thread); - ctxt->bg_thread = NULL; - } -} - -static void yaffs_write_super(struct super_block *sb) -{ - unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2); - - yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, - "yaffs_write_super%s", - request_checkpoint ? " checkpt" : ""); - - yaffs_do_sync_fs(sb, request_checkpoint); - -} - -static int yaffs_sync_fs(struct super_block *sb, int wait) -{ - unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1); - - yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, - "yaffs_sync_fs%s", request_checkpoint ? " checkpt" : ""); - - yaffs_do_sync_fs(sb, request_checkpoint); - - return 0; -} - - -static LIST_HEAD(yaffs_context_list); -struct mutex yaffs_context_lock; - - - -struct yaffs_options { - int inband_tags; - int skip_checkpoint_read; - int skip_checkpoint_write; - int no_cache; - int tags_ecc_on; - int tags_ecc_overridden; - int lazy_loading_enabled; - int lazy_loading_overridden; - int empty_lost_and_found; - int empty_lost_and_found_overridden; -}; - -#define MAX_OPT_LEN 30 -static int yaffs_parse_options(struct yaffs_options *options, - const char *options_str) -{ - char cur_opt[MAX_OPT_LEN + 1]; - int p; - int error = 0; - - /* Parse through the options which is a comma seperated list */ - - while (options_str && *options_str && !error) { - memset(cur_opt, 0, MAX_OPT_LEN + 1); - p = 0; - - while (*options_str == ',') - options_str++; - - while (*options_str && *options_str != ',') { - if (p < MAX_OPT_LEN) { - cur_opt[p] = *options_str; - p++; - } - options_str++; - } - - if (!strcmp(cur_opt, "inband-tags")) { - options->inband_tags = 1; - } else if (!strcmp(cur_opt, "tags-ecc-off")) { - options->tags_ecc_on = 0; - options->tags_ecc_overridden = 1; - } else if (!strcmp(cur_opt, "tags-ecc-on")) { - options->tags_ecc_on = 1; - options->tags_ecc_overridden = 1; - } else if (!strcmp(cur_opt, "lazy-loading-off")) { - options->lazy_loading_enabled = 0; - options->lazy_loading_overridden = 1; - } else if (!strcmp(cur_opt, "lazy-loading-on")) { - options->lazy_loading_enabled = 1; - options->lazy_loading_overridden = 1; - } else if (!strcmp(cur_opt, "empty-lost-and-found-off")) { - options->empty_lost_and_found = 0; - options->empty_lost_and_found_overridden = 1; - } else if (!strcmp(cur_opt, "empty-lost-and-found-on")) { - options->empty_lost_and_found = 1; - options->empty_lost_and_found_overridden = 1; - } else if (!strcmp(cur_opt, "no-cache")) { - options->no_cache = 1; - } else if (!strcmp(cur_opt, "no-checkpoint-read")) { - options->skip_checkpoint_read = 1; - } else if (!strcmp(cur_opt, "no-checkpoint-write")) { - options->skip_checkpoint_write = 1; - } else if (!strcmp(cur_opt, "no-checkpoint")) { - options->skip_checkpoint_read = 1; - options->skip_checkpoint_write = 1; - } else { - printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n", - cur_opt); - error = 1; - } - } - - return error; -} - -static struct address_space_operations yaffs_file_address_operations = { - .readpage = yaffs_readpage, - .writepage = yaffs_writepage, - .write_begin = yaffs_write_begin, - .write_end = yaffs_write_end, -}; - - - -static const struct inode_operations yaffs_file_inode_operations = { - .setattr = yaffs_setattr, -#ifdef CONFIG_YAFFS_XATTR - .setxattr = yaffs_setxattr, - .getxattr = yaffs_getxattr, - .listxattr = yaffs_listxattr, - .removexattr = yaffs_removexattr, -#endif -}; - -static const struct inode_operations yaffs_symlink_inode_operations = { - .readlink = yaffs_readlink, - .follow_link = yaffs_follow_link, - .put_link = yaffs_put_link, - .setattr = yaffs_setattr, -#ifdef CONFIG_YAFFS_XATTR - .setxattr = yaffs_setxattr, - .getxattr = yaffs_getxattr, - .listxattr = yaffs_listxattr, - .removexattr = yaffs_removexattr, -#endif -}; - -static void yaffs_fill_inode_from_obj(struct inode *inode, - struct yaffs_obj *obj) -{ - if (inode && obj) { - - /* Check mode against the variant type and attempt to repair if broken. */ - u32 mode = obj->yst_mode; - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - if (!S_ISREG(mode)) { - obj->yst_mode &= ~S_IFMT; - obj->yst_mode |= S_IFREG; - } - - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - if (!S_ISLNK(mode)) { - obj->yst_mode &= ~S_IFMT; - obj->yst_mode |= S_IFLNK; - } - - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - if (!S_ISDIR(mode)) { - obj->yst_mode &= ~S_IFMT; - obj->yst_mode |= S_IFDIR; - } - - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_SPECIAL: - default: - /* TODO? */ - break; - } - - inode->i_flags |= S_NOATIME; - - inode->i_ino = obj->obj_id; - inode->i_mode = obj->yst_mode; - inode->i_uid = obj->yst_uid; - inode->i_gid = obj->yst_gid; - - inode->i_rdev = old_decode_dev(obj->yst_rdev); - - inode->i_atime.tv_sec = (time_t) (obj->yst_atime); - inode->i_atime.tv_nsec = 0; - inode->i_mtime.tv_sec = (time_t) obj->yst_mtime; - inode->i_mtime.tv_nsec = 0; - inode->i_ctime.tv_sec = (time_t) obj->yst_ctime; - inode->i_ctime.tv_nsec = 0; - inode->i_size = yaffs_get_obj_length(obj); - inode->i_blocks = (inode->i_size + 511) >> 9; - - inode->i_nlink = yaffs_get_obj_link_count(obj); - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_fill_inode mode %x uid %d gid %d size %d count %d", - inode->i_mode, inode->i_uid, inode->i_gid, - (int)inode->i_size, atomic_read(&inode->i_count)); - - switch (obj->yst_mode & S_IFMT) { - default: /* fifo, device or socket */ - init_special_inode(inode, obj->yst_mode, - old_decode_dev(obj->yst_rdev)); - break; - case S_IFREG: /* file */ - inode->i_op = &yaffs_file_inode_operations; - inode->i_fop = &yaffs_file_operations; - inode->i_mapping->a_ops = - &yaffs_file_address_operations; - break; - case S_IFDIR: /* directory */ - inode->i_op = &yaffs_dir_inode_operations; - inode->i_fop = &yaffs_dir_operations; - break; - case S_IFLNK: /* symlink */ - inode->i_op = &yaffs_symlink_inode_operations; - break; - } - - yaffs_inode_to_obj_lv(inode) = obj; - - obj->my_inode = inode; - - } else { - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_fill_inode invalid parameters"); - } -} - -static void yaffs_put_super(struct super_block *sb) -{ - struct yaffs_dev *dev = yaffs_super_to_dev(sb); - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_put_super"); - - yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, - "Shutting down yaffs background thread"); - yaffs_bg_stop(dev); - yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, - "yaffs background thread shut down"); - - yaffs_gross_lock(dev); - - yaffs_flush_super(sb, 1); - - if (yaffs_dev_to_lc(dev)->put_super_fn) - yaffs_dev_to_lc(dev)->put_super_fn(sb); - - yaffs_deinitialise(dev); - - yaffs_gross_unlock(dev); - mutex_lock(&yaffs_context_lock); - list_del_init(&(yaffs_dev_to_lc(dev)->context_list)); - mutex_unlock(&yaffs_context_lock); - - if (yaffs_dev_to_lc(dev)->spare_buffer) { - kfree(yaffs_dev_to_lc(dev)->spare_buffer); - yaffs_dev_to_lc(dev)->spare_buffer = NULL; - } - - kfree(dev); -} - -static void yaffs_mtd_put_super(struct super_block *sb) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_super_to_dev(sb)); - - if (mtd->sync) - mtd->sync(mtd); - - put_mtd_device(mtd); -} - -static const struct super_operations yaffs_super_ops = { - .statfs = yaffs_statfs, - .put_super = yaffs_put_super, - .evict_inode = yaffs_evict_inode, - .sync_fs = yaffs_sync_fs, - .write_super = yaffs_write_super, -}; - -static struct super_block *yaffs_internal_read_super(int yaffs_version, - struct super_block *sb, - void *data, int silent) -{ - int n_blocks; - struct inode *inode = NULL; - struct dentry *root; - struct yaffs_dev *dev = 0; - char devname_buf[BDEVNAME_SIZE + 1]; - struct mtd_info *mtd; - int err; - char *data_str = (char *)data; - struct yaffs_linux_context *context = NULL; - struct yaffs_param *param; - - int read_only = 0; - - struct yaffs_options options; - - unsigned mount_id; - int found; - struct yaffs_linux_context *context_iterator; - struct list_head *l; - - sb->s_magic = YAFFS_MAGIC; - sb->s_op = &yaffs_super_ops; - sb->s_flags |= MS_NOATIME; - - read_only = ((sb->s_flags & MS_RDONLY) != 0); - - sb->s_export_op = &yaffs_export_ops; - - if (!sb) - printk(KERN_INFO "yaffs: sb is NULL\n"); - else if (!sb->s_dev) - printk(KERN_INFO "yaffs: sb->s_dev is NULL\n"); - else if (!yaffs_devname(sb, devname_buf)) - printk(KERN_INFO "yaffs: devname is NULL\n"); - else - printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n", - sb->s_dev, - yaffs_devname(sb, devname_buf), read_only ? "ro" : "rw"); - - if (!data_str) - data_str = ""; - - printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str); - - memset(&options, 0, sizeof(options)); - - if (yaffs_parse_options(&options, data_str)) { - /* Option parsing failed */ - return NULL; - } - - sb->s_blocksize = PAGE_CACHE_SIZE; - sb->s_blocksize_bits = PAGE_CACHE_SHIFT; - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_read_super: Using yaffs%d", yaffs_version); - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_read_super: block size %d", (int)(sb->s_blocksize)); - - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Attempting MTD mount of %u.%u,\"%s\"", - MAJOR(sb->s_dev), MINOR(sb->s_dev), - yaffs_devname(sb, devname_buf)); - - /* Check it's an mtd device..... */ - if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) - return NULL; /* This isn't an mtd device */ - - /* Get the device */ - mtd = get_mtd_device(NULL, MINOR(sb->s_dev)); - if (!mtd) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "MTD device #%u doesn't appear to exist", - MINOR(sb->s_dev)); - return NULL; - } - /* Check it's NAND */ - if (mtd->type != MTD_NANDFLASH) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "MTD device is not NAND it's type %d", - mtd->type); - return NULL; - } - - yaffs_trace(YAFFS_TRACE_OS, " erase %p", mtd->erase); - yaffs_trace(YAFFS_TRACE_OS, " read %p", mtd->read); - yaffs_trace(YAFFS_TRACE_OS, " write %p", mtd->write); - yaffs_trace(YAFFS_TRACE_OS, " readoob %p", mtd->read_oob); - yaffs_trace(YAFFS_TRACE_OS, " writeoob %p", mtd->write_oob); - yaffs_trace(YAFFS_TRACE_OS, " block_isbad %p", mtd->block_isbad); - yaffs_trace(YAFFS_TRACE_OS, " block_markbad %p", mtd->block_markbad); - yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd)); - yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize); - yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize); - yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size); - -#ifdef CONFIG_YAFFS_AUTO_YAFFS2 - - if (yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2"); - yaffs_version = 2; - } - - /* Added NCB 26/5/2006 for completeness */ - if (yaffs_version == 2 && !options.inband_tags - && WRITE_SIZE(mtd) == 512) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1"); - yaffs_version = 1; - } -#endif - - if (yaffs_version == 2) { - /* Check for version 2 style functions */ - if (!mtd->erase || - !mtd->block_isbad || - !mtd->block_markbad || - !mtd->read || - !mtd->write || !mtd->read_oob || !mtd->write_oob) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "MTD device does not support required functions"); - return NULL; - } - - if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE || - mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) && - !options.inband_tags) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "MTD device does not have the right page sizes"); - return NULL; - } - } else { - /* Check for V1 style functions */ - if (!mtd->erase || - !mtd->read || - !mtd->write || !mtd->read_oob || !mtd->write_oob) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "MTD device does not support required functions"); - return NULL; - } - - if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK || - mtd->oobsize != YAFFS_BYTES_PER_SPARE) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "MTD device does not support have the right page sizes"); - return NULL; - } - } - - /* OK, so if we got here, we have an MTD that's NAND and looks - * like it has the right capabilities - * Set the struct yaffs_dev up for mtd - */ - - if (!read_only && !(mtd->flags & MTD_WRITEABLE)) { - read_only = 1; - printk(KERN_INFO - "yaffs: mtd is read only, setting superblock read only"); - sb->s_flags |= MS_RDONLY; - } - - dev = kmalloc(sizeof(struct yaffs_dev), GFP_KERNEL); - context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL); - - if (!dev || !context) { - if (dev) - kfree(dev); - if (context) - kfree(context); - dev = NULL; - context = NULL; - } - - if (!dev) { - /* Deep shit could not allocate device structure */ - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs_read_super failed trying to allocate yaffs_dev"); - return NULL; - } - memset(dev, 0, sizeof(struct yaffs_dev)); - param = &(dev->param); - - memset(context, 0, sizeof(struct yaffs_linux_context)); - dev->os_context = context; - INIT_LIST_HEAD(&(context->context_list)); - context->dev = dev; - context->super = sb; - - dev->read_only = read_only; - - sb->s_fs_info = dev; - - dev->driver_context = mtd; - param->name = mtd->name; - - /* Set up the memory size parameters.... */ - - n_blocks = - YCALCBLOCKS(mtd->size, - (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK)); - - param->start_block = 0; - param->end_block = n_blocks - 1; - param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK; - param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK; - param->n_reserved_blocks = 5; - param->n_caches = (options.no_cache) ? 0 : 10; - param->inband_tags = options.inband_tags; - -#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD - param->disable_lazy_load = 1; -#endif -#ifdef CONFIG_YAFFS_XATTR - param->enable_xattr = 1; -#endif - if (options.lazy_loading_overridden) - param->disable_lazy_load = !options.lazy_loading_enabled; - -#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC - param->no_tags_ecc = 1; -#endif - -#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND -#else - param->defered_dir_update = 1; -#endif - - if (options.tags_ecc_overridden) - param->no_tags_ecc = !options.tags_ecc_on; - -#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND - param->empty_lost_n_found = 1; -#endif - -#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING - param->refresh_period = 0; -#else - param->refresh_period = 500; -#endif - -#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED - param->always_check_erased = 1; -#endif - - if (options.empty_lost_and_found_overridden) - param->empty_lost_n_found = options.empty_lost_and_found; - - /* ... and the functions. */ - if (yaffs_version == 2) { - param->write_chunk_tags_fn = nandmtd2_write_chunk_tags; - param->read_chunk_tags_fn = nandmtd2_read_chunk_tags; - param->bad_block_fn = nandmtd2_mark_block_bad; - param->query_block_fn = nandmtd2_query_block; - yaffs_dev_to_lc(dev)->spare_buffer = - kmalloc(mtd->oobsize, GFP_NOFS); - param->is_yaffs2 = 1; - param->total_bytes_per_chunk = mtd->writesize; - param->chunks_per_block = mtd->erasesize / mtd->writesize; - n_blocks = YCALCBLOCKS(mtd->size, mtd->erasesize); - - param->start_block = 0; - param->end_block = n_blocks - 1; - } else { - /* use the MTD interface in yaffs_mtdif1.c */ - param->write_chunk_tags_fn = nandmtd1_write_chunk_tags; - param->read_chunk_tags_fn = nandmtd1_read_chunk_tags; - param->bad_block_fn = nandmtd1_mark_block_bad; - param->query_block_fn = nandmtd1_query_block; - param->is_yaffs2 = 0; - } - /* ... and common functions */ - param->erase_fn = nandmtd_erase_block; - param->initialise_flash_fn = nandmtd_initialise; - - yaffs_dev_to_lc(dev)->put_super_fn = yaffs_mtd_put_super; - - param->sb_dirty_fn = yaffs_touch_super; - param->gc_control = yaffs_gc_control_callback; - - yaffs_dev_to_lc(dev)->super = sb; - -#ifndef CONFIG_YAFFS_DOES_ECC - param->use_nand_ecc = 1; -#endif - - param->skip_checkpt_rd = options.skip_checkpoint_read; - param->skip_checkpt_wr = options.skip_checkpoint_write; - - mutex_lock(&yaffs_context_lock); - /* Get a mount id */ - found = 0; - for (mount_id = 0; !found; mount_id++) { - found = 1; - list_for_each(l, &yaffs_context_list) { - context_iterator = - list_entry(l, struct yaffs_linux_context, - context_list); - if (context_iterator->mount_id == mount_id) - found = 0; - } - } - context->mount_id = mount_id; - - list_add_tail(&(yaffs_dev_to_lc(dev)->context_list), - &yaffs_context_list); - mutex_unlock(&yaffs_context_lock); - - /* Directory search handling... */ - INIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts)); - param->remove_obj_fn = yaffs_remove_obj_callback; - - mutex_init(&(yaffs_dev_to_lc(dev)->gross_lock)); - - yaffs_gross_lock(dev); - - err = yaffs_guts_initialise(dev); - - yaffs_trace(YAFFS_TRACE_OS, - "yaffs_read_super: guts initialised %s", - (err == YAFFS_OK) ? "OK" : "FAILED"); - - if (err == YAFFS_OK) - yaffs_bg_start(dev); - - if (!context->bg_thread) - param->defered_dir_update = 0; - - /* Release lock before yaffs_get_inode() */ - yaffs_gross_unlock(dev); - - /* Create root inode */ - if (err == YAFFS_OK) - inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, yaffs_root(dev)); - - if (!inode) - return NULL; - - inode->i_op = &yaffs_dir_inode_operations; - inode->i_fop = &yaffs_dir_operations; - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode"); - - root = d_alloc_root(inode); - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: d_alloc_root done"); - - if (!root) { - iput(inode); - return NULL; - } - sb->s_root = root; - sb->s_dirt = !dev->is_checkpointed; - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs_read_super: is_checkpointed %d", - dev->is_checkpointed); - - yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done"); - return sb; -} - -static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data, - int silent) -{ - return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL; -} - -static int yaffs_read_super(struct file_system_type *fs, - int flags, const char *dev_name, - void *data, struct vfsmount *mnt) -{ - - return get_sb_bdev(fs, flags, dev_name, data, - yaffs_internal_read_super_mtd, mnt); -} - -static struct file_system_type yaffs_fs_type = { - .owner = THIS_MODULE, - .name = "yaffs", - .get_sb = yaffs_read_super, - .kill_sb = kill_block_super, - .fs_flags = FS_REQUIRES_DEV, -}; - -#ifdef CONFIG_YAFFS_YAFFS2 - -static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data, - int silent) -{ - return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL; -} - -static int yaffs2_read_super(struct file_system_type *fs, - int flags, const char *dev_name, void *data, - struct vfsmount *mnt) -{ - return get_sb_bdev(fs, flags, dev_name, data, - yaffs2_internal_read_super_mtd, mnt); -} - -static struct file_system_type yaffs2_fs_type = { - .owner = THIS_MODULE, - .name = "yaffs2", - .get_sb = yaffs2_read_super, - .kill_sb = kill_block_super, - .fs_flags = FS_REQUIRES_DEV, -}; -#endif /* CONFIG_YAFFS_YAFFS2 */ - -static struct proc_dir_entry *my_proc_entry; - -static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev) -{ - struct yaffs_param *param = &dev->param; - buf += sprintf(buf, "start_block........... %d\n", param->start_block); - buf += sprintf(buf, "end_block............. %d\n", param->end_block); - buf += sprintf(buf, "total_bytes_per_chunk. %d\n", - param->total_bytes_per_chunk); - buf += sprintf(buf, "use_nand_ecc.......... %d\n", - param->use_nand_ecc); - buf += sprintf(buf, "no_tags_ecc........... %d\n", param->no_tags_ecc); - buf += sprintf(buf, "is_yaffs2............. %d\n", param->is_yaffs2); - buf += sprintf(buf, "inband_tags........... %d\n", param->inband_tags); - buf += sprintf(buf, "empty_lost_n_found.... %d\n", - param->empty_lost_n_found); - buf += sprintf(buf, "disable_lazy_load..... %d\n", - param->disable_lazy_load); - buf += sprintf(buf, "refresh_period........ %d\n", - param->refresh_period); - buf += sprintf(buf, "n_caches.............. %d\n", param->n_caches); - buf += sprintf(buf, "n_reserved_blocks..... %d\n", - param->n_reserved_blocks); - buf += sprintf(buf, "always_check_erased... %d\n", - param->always_check_erased); - - return buf; -} - -static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev) -{ - buf += - sprintf(buf, "data_bytes_per_chunk.. %d\n", - dev->data_bytes_per_chunk); - buf += sprintf(buf, "chunk_grp_bits........ %d\n", dev->chunk_grp_bits); - buf += sprintf(buf, "chunk_grp_size........ %d\n", dev->chunk_grp_size); - buf += - sprintf(buf, "n_erased_blocks....... %d\n", dev->n_erased_blocks); - buf += - sprintf(buf, "blocks_in_checkpt..... %d\n", dev->blocks_in_checkpt); - buf += sprintf(buf, "\n"); - buf += sprintf(buf, "n_tnodes.............. %d\n", dev->n_tnodes); - buf += sprintf(buf, "n_obj................. %d\n", dev->n_obj); - buf += sprintf(buf, "n_free_chunks......... %d\n", dev->n_free_chunks); - buf += sprintf(buf, "\n"); - buf += sprintf(buf, "n_page_writes......... %u\n", dev->n_page_writes); - buf += sprintf(buf, "n_page_reads.......... %u\n", dev->n_page_reads); - buf += sprintf(buf, "n_erasures............ %u\n", dev->n_erasures); - buf += sprintf(buf, "n_gc_copies........... %u\n", dev->n_gc_copies); - buf += sprintf(buf, "all_gcs............... %u\n", dev->all_gcs); - buf += - sprintf(buf, "passive_gc_count...... %u\n", dev->passive_gc_count); - buf += - sprintf(buf, "oldest_dirty_gc_count. %u\n", - dev->oldest_dirty_gc_count); - buf += sprintf(buf, "n_gc_blocks........... %u\n", dev->n_gc_blocks); - buf += sprintf(buf, "bg_gcs................ %u\n", dev->bg_gcs); - buf += - sprintf(buf, "n_retired_writes...... %u\n", dev->n_retired_writes); - buf += - sprintf(buf, "n_retired_blocks...... %u\n", dev->n_retired_blocks); - buf += sprintf(buf, "n_ecc_fixed........... %u\n", dev->n_ecc_fixed); - buf += sprintf(buf, "n_ecc_unfixed......... %u\n", dev->n_ecc_unfixed); - buf += - sprintf(buf, "n_tags_ecc_fixed...... %u\n", dev->n_tags_ecc_fixed); - buf += - sprintf(buf, "n_tags_ecc_unfixed.... %u\n", - dev->n_tags_ecc_unfixed); - buf += sprintf(buf, "cache_hits............ %u\n", dev->cache_hits); - buf += - sprintf(buf, "n_deleted_files....... %u\n", dev->n_deleted_files); - buf += - sprintf(buf, "n_unlinked_files...... %u\n", dev->n_unlinked_files); - buf += sprintf(buf, "refresh_count......... %u\n", dev->refresh_count); - buf += sprintf(buf, "n_bg_deletions........ %u\n", dev->n_bg_deletions); - - return buf; -} - -static int yaffs_proc_read(char *page, - char **start, - off_t offset, int count, int *eof, void *data) -{ - struct list_head *item; - char *buf = page; - int step = offset; - int n = 0; - - /* Get proc_file_read() to step 'offset' by one on each sucessive call. - * We use 'offset' (*ppos) to indicate where we are in dev_list. - * This also assumes the user has posted a read buffer large - * enough to hold the complete output; but that's life in /proc. - */ - - *(int *)start = 1; - - /* Print header first */ - if (step == 0) - buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__ "\n"); - else if (step == 1) - buf += sprintf(buf, "\n"); - else { - step -= 2; - - mutex_lock(&yaffs_context_lock); - - /* Locate and print the Nth entry. Order N-squared but N is small. */ - list_for_each(item, &yaffs_context_list) { - struct yaffs_linux_context *dc = - list_entry(item, struct yaffs_linux_context, - context_list); - struct yaffs_dev *dev = dc->dev; - - if (n < (step & ~1)) { - n += 2; - continue; - } - if ((step & 1) == 0) { - buf += - sprintf(buf, "\nDevice %d \"%s\"\n", n, - dev->param.name); - buf = yaffs_dump_dev_part0(buf, dev); - } else { - buf = yaffs_dump_dev_part1(buf, dev); - } - - break; - } - mutex_unlock(&yaffs_context_lock); - } - - return buf - page < count ? buf - page : count; -} - - -/** - * Set the verbosity of the warnings and error messages. - * - * Note that the names can only be a..z or _ with the current code. - */ - -static struct { - char *mask_name; - unsigned mask_bitfield; -} mask_flags[] = { - {"allocate", YAFFS_TRACE_ALLOCATE}, - {"always", YAFFS_TRACE_ALWAYS}, - {"background", YAFFS_TRACE_BACKGROUND}, - {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS}, - {"buffers", YAFFS_TRACE_BUFFERS}, - {"bug", YAFFS_TRACE_BUG}, - {"checkpt", YAFFS_TRACE_CHECKPOINT}, - {"deletion", YAFFS_TRACE_DELETION}, - {"erase", YAFFS_TRACE_ERASE}, - {"error", YAFFS_TRACE_ERROR}, - {"gc_detail", YAFFS_TRACE_GC_DETAIL}, - {"gc", YAFFS_TRACE_GC}, - {"lock", YAFFS_TRACE_LOCK}, - {"mtd", YAFFS_TRACE_MTD}, - {"nandaccess", YAFFS_TRACE_NANDACCESS}, - {"os", YAFFS_TRACE_OS}, - {"scan_debug", YAFFS_TRACE_SCAN_DEBUG}, - {"scan", YAFFS_TRACE_SCAN}, - {"mount", YAFFS_TRACE_MOUNT}, - {"tracing", YAFFS_TRACE_TRACING}, - {"sync", YAFFS_TRACE_SYNC}, - {"write", YAFFS_TRACE_WRITE}, - {"verify", YAFFS_TRACE_VERIFY}, - {"verify_nand", YAFFS_TRACE_VERIFY_NAND}, - {"verify_full", YAFFS_TRACE_VERIFY_FULL}, - {"verify_all", YAFFS_TRACE_VERIFY_ALL}, - {"all", 0xffffffff}, - {"none", 0}, - {NULL, 0}, -}; - -#define MAX_MASK_NAME_LENGTH 40 -static int yaffs_proc_write_trace_options(struct file *file, const char *buf, - unsigned long count, void *data) -{ - unsigned rg = 0, mask_bitfield; - char *end; - char *mask_name; - const char *x; - char substring[MAX_MASK_NAME_LENGTH + 1]; - int i; - int done = 0; - int add, len = 0; - int pos = 0; - - rg = yaffs_trace_mask; - - while (!done && (pos < count)) { - done = 1; - while ((pos < count) && isspace(buf[pos])) - pos++; - - switch (buf[pos]) { - case '+': - case '-': - case '=': - add = buf[pos]; - pos++; - break; - - default: - add = ' '; - break; - } - mask_name = NULL; - - mask_bitfield = simple_strtoul(buf + pos, &end, 0); - - if (end > buf + pos) { - mask_name = "numeral"; - len = end - (buf + pos); - pos += len; - done = 0; - } else { - for (x = buf + pos, i = 0; - (*x == '_' || (*x >= 'a' && *x <= 'z')) && - i < MAX_MASK_NAME_LENGTH; x++, i++, pos++) - substring[i] = *x; - substring[i] = '\0'; - - for (i = 0; mask_flags[i].mask_name != NULL; i++) { - if (strcmp(substring, mask_flags[i].mask_name) - == 0) { - mask_name = mask_flags[i].mask_name; - mask_bitfield = - mask_flags[i].mask_bitfield; - done = 0; - break; - } - } - } - - if (mask_name != NULL) { - done = 0; - switch (add) { - case '-': - rg &= ~mask_bitfield; - break; - case '+': - rg |= mask_bitfield; - break; - case '=': - rg = mask_bitfield; - break; - default: - rg |= mask_bitfield; - break; - } - } - } - - yaffs_trace_mask = rg | YAFFS_TRACE_ALWAYS; - - printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask); - - if (rg & YAFFS_TRACE_ALWAYS) { - for (i = 0; mask_flags[i].mask_name != NULL; i++) { - char flag; - flag = ((rg & mask_flags[i].mask_bitfield) == - mask_flags[i].mask_bitfield) ? '+' : '-'; - printk(KERN_DEBUG "%c%s\n", flag, - mask_flags[i].mask_name); - } - } - - return count; -} - -static int yaffs_proc_write(struct file *file, const char *buf, - unsigned long count, void *data) -{ - return yaffs_proc_write_trace_options(file, buf, count, data); -} - -/* Stuff to handle installation of file systems */ -struct file_system_to_install { - struct file_system_type *fst; - int installed; -}; - -static struct file_system_to_install fs_to_install[] = { - {&yaffs_fs_type, 0}, - {&yaffs2_fs_type, 0}, - {NULL, 0} -}; - -static int __init init_yaffs_fs(void) -{ - int error = 0; - struct file_system_to_install *fsinst; - - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs built " __DATE__ " " __TIME__ " Installing."); - -#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED - yaffs_trace(YAFFS_TRACE_ALWAYS, - "\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n"); -#endif - - mutex_init(&yaffs_context_lock); - - /* Install the proc_fs entries */ - my_proc_entry = create_proc_entry("yaffs", - S_IRUGO | S_IFREG, YPROC_ROOT); - - if (my_proc_entry) { - my_proc_entry->write_proc = yaffs_proc_write; - my_proc_entry->read_proc = yaffs_proc_read; - my_proc_entry->data = NULL; - } else { - return -ENOMEM; - } - - - /* Now add the file system entries */ - - fsinst = fs_to_install; - - while (fsinst->fst && !error) { - error = register_filesystem(fsinst->fst); - if (!error) - fsinst->installed = 1; - fsinst++; - } - - /* Any errors? uninstall */ - if (error) { - fsinst = fs_to_install; - - while (fsinst->fst) { - if (fsinst->installed) { - unregister_filesystem(fsinst->fst); - fsinst->installed = 0; - } - fsinst++; - } - } - - return error; -} - -static void __exit exit_yaffs_fs(void) -{ - - struct file_system_to_install *fsinst; - - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs built " __DATE__ " " __TIME__ " removing."); - - remove_proc_entry("yaffs", YPROC_ROOT); - - fsinst = fs_to_install; - - while (fsinst->fst) { - if (fsinst->installed) { - unregister_filesystem(fsinst->fst); - fsinst->installed = 0; - } - fsinst++; - } -} - -module_init(init_yaffs_fs) - module_exit(exit_yaffs_fs) - - MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system"); -MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010"); -MODULE_LICENSE("GPL"); diff --git a/fs/yaffs2/yaffs_yaffs1.c b/fs/yaffs2/yaffs_yaffs1.c deleted file mode 100644 index 9eb6030..0000000 --- a/fs/yaffs2/yaffs_yaffs1.c +++ /dev/null @@ -1,433 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_yaffs1.h" -#include "yportenv.h" -#include "yaffs_trace.h" -#include "yaffs_bitmap.h" -#include "yaffs_getblockinfo.h" -#include "yaffs_nand.h" -#include "yaffs_attribs.h" - -int yaffs1_scan(struct yaffs_dev *dev) -{ - struct yaffs_ext_tags tags; - int blk; - int result; - - int chunk; - int c; - int deleted; - enum yaffs_block_state state; - struct yaffs_obj *hard_list = NULL; - struct yaffs_block_info *bi; - u32 seq_number; - struct yaffs_obj_hdr *oh; - struct yaffs_obj *in; - struct yaffs_obj *parent; - - int alloc_failed = 0; - - struct yaffs_shadow_fixer *shadow_fixers = NULL; - - u8 *chunk_data; - - yaffs_trace(YAFFS_TRACE_SCAN, - "yaffs1_scan starts intstartblk %d intendblk %d...", - dev->internal_start_block, dev->internal_end_block); - - chunk_data = yaffs_get_temp_buffer(dev, __LINE__); - - dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER; - - /* Scan all the blocks to determine their state */ - bi = dev->block_info; - for (blk = dev->internal_start_block; blk <= dev->internal_end_block; - blk++) { - yaffs_clear_chunk_bits(dev, blk); - bi->pages_in_use = 0; - bi->soft_del_pages = 0; - - yaffs_query_init_block_state(dev, blk, &state, &seq_number); - - bi->block_state = state; - bi->seq_number = seq_number; - - if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK) - bi->block_state = state = YAFFS_BLOCK_STATE_DEAD; - - yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, - "Block scanning block %d state %d seq %d", - blk, state, seq_number); - - if (state == YAFFS_BLOCK_STATE_DEAD) { - yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, - "block %d is bad", blk); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty "); - dev->n_erased_blocks++; - dev->n_free_chunks += dev->param.chunks_per_block; - } - bi++; - } - - /* For each block.... */ - for (blk = dev->internal_start_block; - !alloc_failed && blk <= dev->internal_end_block; blk++) { - - cond_resched(); - - bi = yaffs_get_block_info(dev, blk); - state = bi->block_state; - - deleted = 0; - - /* For each chunk in each block that needs scanning.... */ - for (c = 0; !alloc_failed && c < dev->param.chunks_per_block && - state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { - /* Read the tags and decide what to do */ - chunk = blk * dev->param.chunks_per_block + c; - - result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, - &tags); - - /* Let's have a good look at this chunk... */ - - if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED - || tags.is_deleted) { - /* YAFFS1 only... - * A deleted chunk - */ - deleted++; - dev->n_free_chunks++; - /*T((" %d %d deleted\n",blk,c)); */ - } else if (!tags.chunk_used) { - /* An unassigned chunk in the block - * This means that either the block is empty or - * this is the one being allocated from - */ - - if (c == 0) { - /* We're looking at the first chunk in the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->n_erased_blocks++; - } else { - /* this is the block being allocated from */ - yaffs_trace(YAFFS_TRACE_SCAN, - " Allocating from %d %d", - blk, c); - state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->alloc_block = blk; - dev->alloc_page = c; - dev->alloc_block_finder = blk; - /* Set block finder here to encourage the allocator to go forth from here. */ - - } - - dev->n_free_chunks += - (dev->param.chunks_per_block - c); - } else if (tags.chunk_id > 0) { - /* chunk_id > 0 so it is a data chunk... */ - unsigned int endpos; - - yaffs_set_chunk_bit(dev, blk, c); - bi->pages_in_use++; - - in = yaffs_find_or_create_by_number(dev, - tags.obj_id, - YAFFS_OBJECT_TYPE_FILE); - /* PutChunkIntoFile checks for a clash (two data chunks with - * the same chunk_id). - */ - - if (!in) - alloc_failed = 1; - - if (in) { - if (!yaffs_put_chunk_in_file - (in, tags.chunk_id, chunk, 1)) - alloc_failed = 1; - } - - endpos = - (tags.chunk_id - - 1) * dev->data_bytes_per_chunk + - tags.n_bytes; - if (in - && in->variant_type == - YAFFS_OBJECT_TYPE_FILE - && in->variant.file_variant.scanned_size < - endpos) { - in->variant.file_variant.scanned_size = - endpos; - if (!dev->param.use_header_file_size) { - in->variant. - file_variant.file_size = - in->variant. - file_variant.scanned_size; - } - - } - /* T((" %d %d data %d %d\n",blk,c,tags.obj_id,tags.chunk_id)); */ - } else { - /* chunk_id == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make the object - */ - yaffs_set_chunk_bit(dev, blk, c); - bi->pages_in_use++; - - result = yaffs_rd_chunk_tags_nand(dev, chunk, - chunk_data, - NULL); - - oh = (struct yaffs_obj_hdr *)chunk_data; - - in = yaffs_find_by_number(dev, tags.obj_id); - if (in && in->variant_type != oh->type) { - /* This should not happen, but somehow - * Wev'e ended up with an obj_id that has been reused but not yet - * deleted, and worse still it has changed type. Delete the old object. - */ - - yaffs_del_obj(in); - - in = 0; - } - - in = yaffs_find_or_create_by_number(dev, - tags.obj_id, - oh->type); - - if (!in) - alloc_failed = 1; - - if (in && oh->shadows_obj > 0) { - - struct yaffs_shadow_fixer *fixer; - fixer = - kmalloc(sizeof - (struct yaffs_shadow_fixer), - GFP_NOFS); - if (fixer) { - fixer->next = shadow_fixers; - shadow_fixers = fixer; - fixer->obj_id = tags.obj_id; - fixer->shadowed_id = - oh->shadows_obj; - yaffs_trace(YAFFS_TRACE_SCAN, - " Shadow fixer: %d shadows %d", - fixer->obj_id, - fixer->shadowed_id); - - } - - } - - if (in && in->valid) { - /* We have already filled this one. We have a duplicate and need to resolve it. */ - - unsigned existing_serial = in->serial; - unsigned new_serial = - tags.serial_number; - - if (((existing_serial + 1) & 3) == - new_serial) { - /* Use new one - destroy the exisiting one */ - yaffs_chunk_del(dev, - in->hdr_chunk, - 1, __LINE__); - in->valid = 0; - } else { - /* Use existing - destroy this one. */ - yaffs_chunk_del(dev, chunk, 1, - __LINE__); - } - } - - if (in && !in->valid && - (tags.obj_id == YAFFS_OBJECTID_ROOT || - tags.obj_id == - YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle with directory structure */ - in->valid = 1; - in->variant_type = oh->type; - - in->yst_mode = oh->yst_mode; - yaffs_load_attribs(in, oh); - in->hdr_chunk = chunk; - in->serial = tags.serial_number; - - } else if (in && !in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->variant_type = oh->type; - - in->yst_mode = oh->yst_mode; - yaffs_load_attribs(in, oh); - in->hdr_chunk = chunk; - in->serial = tags.serial_number; - - yaffs_set_obj_name_from_oh(in, oh); - in->dirty = 0; - - /* directory stuff... - * hook up to parent - */ - - parent = - yaffs_find_or_create_by_number - (dev, oh->parent_obj_id, - YAFFS_OBJECT_TYPE_DIRECTORY); - if (!parent) - alloc_failed = 1; - if (parent && parent->variant_type == - YAFFS_OBJECT_TYPE_UNKNOWN) { - /* Set up as a directory */ - parent->variant_type = - YAFFS_OBJECT_TYPE_DIRECTORY; - INIT_LIST_HEAD(&parent-> - variant.dir_variant.children); - } else if (!parent - || parent->variant_type != - YAFFS_OBJECT_TYPE_DIRECTORY) { - /* Hoosterman, another problem.... - * We're trying to use a non-directory as a directory - */ - - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." - ); - parent = dev->lost_n_found; - } - - yaffs_add_obj_to_dir(parent, in); - - if (0 && (parent == dev->del_dir || - parent == - dev->unlinked_dir)) { - in->deleted = 1; /* If it is unlinked at start up then it wants deleting */ - dev->n_deleted_files++; - } - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent object is scanned - * we put them all in a list. - * After scanning is complete, we should have all the objects, so we run through this - * list and fix up all the chains. - */ - - switch (in->variant_type) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - if (dev->param. - use_header_file_size) - - in->variant. - file_variant.file_size - = oh->file_size; - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant. - hardlink_variant.equiv_id = - oh->equiv_id; - in->hard_links.next = - (struct list_head *) - hard_list; - hard_list = in; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symlink_variant. - alias = - yaffs_clone_str(oh->alias); - if (!in->variant. - symlink_variant.alias) - alloc_failed = 1; - break; - } - - } - } - } - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - /* If we got this far while scanning, then the block is fully allocated. */ - state = YAFFS_BLOCK_STATE_FULL; - } - - if (state == YAFFS_BLOCK_STATE_ALLOCATING) { - /* If the block was partially allocated then treat it as fully allocated. */ - state = YAFFS_BLOCK_STATE_FULL; - dev->alloc_block = -1; - } - - bi->block_state = state; - - /* Now let's see if it was dirty */ - if (bi->pages_in_use == 0 && - !bi->has_shrink_hdr && - bi->block_state == YAFFS_BLOCK_STATE_FULL) { - yaffs_block_became_dirty(dev, blk); - } - - } - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add these - * hardlinks. - */ - - yaffs_link_fixup(dev, hard_list); - - /* Fix up any shadowed objects */ - { - struct yaffs_shadow_fixer *fixer; - struct yaffs_obj *obj; - - while (shadow_fixers) { - fixer = shadow_fixers; - shadow_fixers = fixer->next; - /* Complete the rename transaction by deleting the shadowed object - * then setting the object header to unshadowed. - */ - obj = yaffs_find_by_number(dev, fixer->shadowed_id); - if (obj) - yaffs_del_obj(obj); - - obj = yaffs_find_by_number(dev, fixer->obj_id); - - if (obj) - yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); - - kfree(fixer); - } - } - - yaffs_release_temp_buffer(dev, chunk_data, __LINE__); - - if (alloc_failed) - return YAFFS_FAIL; - - yaffs_trace(YAFFS_TRACE_SCAN, "yaffs1_scan ends"); - - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_yaffs1.h b/fs/yaffs2/yaffs_yaffs1.h deleted file mode 100644 index db23e04..0000000 --- a/fs/yaffs2/yaffs_yaffs1.h +++ /dev/null @@ -1,22 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_YAFFS1_H__ -#define __YAFFS_YAFFS1_H__ - -#include "yaffs_guts.h" -int yaffs1_scan(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yaffs_yaffs2.c b/fs/yaffs2/yaffs_yaffs2.c deleted file mode 100644 index 33397af..0000000 --- a/fs/yaffs2/yaffs_yaffs2.c +++ /dev/null @@ -1,1598 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_guts.h" -#include "yaffs_trace.h" -#include "yaffs_yaffs2.h" -#include "yaffs_checkptrw.h" -#include "yaffs_bitmap.h" -#include "yaffs_nand.h" -#include "yaffs_getblockinfo.h" -#include "yaffs_verify.h" -#include "yaffs_attribs.h" - -/* - * Checkpoints are really no benefit on very small partitions. - * - * To save space on small partitions don't bother with checkpoints unless - * the partition is at least this big. - */ -#define YAFFS_CHECKPOINT_MIN_BLOCKS 60 - -#define YAFFS_SMALL_HOLE_THRESHOLD 4 - -/* - * Oldest Dirty Sequence Number handling. - */ - -/* yaffs_calc_oldest_dirty_seq() - * yaffs2_find_oldest_dirty_seq() - * Calculate the oldest dirty sequence number if we don't know it. - */ -void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev) -{ - int i; - unsigned seq; - unsigned block_no = 0; - struct yaffs_block_info *b; - - if (!dev->param.is_yaffs2) - return; - - /* Find the oldest dirty sequence number. */ - seq = dev->seq_number + 1; - b = dev->block_info; - for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { - if (b->block_state == YAFFS_BLOCK_STATE_FULL && - (b->pages_in_use - b->soft_del_pages) < - dev->param.chunks_per_block && b->seq_number < seq) { - seq = b->seq_number; - block_no = i; - } - b++; - } - - if (block_no) { - dev->oldest_dirty_seq = seq; - dev->oldest_dirty_block = block_no; - } - -} - -void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev) -{ - if (!dev->param.is_yaffs2) - return; - - if (!dev->oldest_dirty_seq) - yaffs_calc_oldest_dirty_seq(dev); -} - -/* - * yaffs_clear_oldest_dirty_seq() - * Called when a block is erased or marked bad. (ie. when its seq_number - * becomes invalid). If the value matches the oldest then we clear - * dev->oldest_dirty_seq to force its recomputation. - */ -void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev, - struct yaffs_block_info *bi) -{ - - if (!dev->param.is_yaffs2) - return; - - if (!bi || bi->seq_number == dev->oldest_dirty_seq) { - dev->oldest_dirty_seq = 0; - dev->oldest_dirty_block = 0; - } -} - -/* - * yaffs2_update_oldest_dirty_seq() - * Update the oldest dirty sequence number whenever we dirty a block. - * Only do this if the oldest_dirty_seq is actually being tracked. - */ -void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no, - struct yaffs_block_info *bi) -{ - if (!dev->param.is_yaffs2) - return; - - if (dev->oldest_dirty_seq) { - if (dev->oldest_dirty_seq > bi->seq_number) { - dev->oldest_dirty_seq = bi->seq_number; - dev->oldest_dirty_block = block_no; - } - } -} - -int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi) -{ - - if (!dev->param.is_yaffs2) - return 1; /* disqualification only applies to yaffs2. */ - - if (!bi->has_shrink_hdr) - return 1; /* can gc */ - - yaffs2_find_oldest_dirty_seq(dev); - - /* Can't do gc of this block if there are any blocks older than this one that have - * discarded pages. - */ - return (bi->seq_number <= dev->oldest_dirty_seq); -} - -/* - * yaffs2_find_refresh_block() - * periodically finds the oldest full block by sequence number for refreshing. - * Only for yaffs2. - */ -u32 yaffs2_find_refresh_block(struct yaffs_dev * dev) -{ - u32 b; - - u32 oldest = 0; - u32 oldest_seq = 0; - - struct yaffs_block_info *bi; - - if (!dev->param.is_yaffs2) - return oldest; - - /* - * If refresh period < 10 then refreshing is disabled. - */ - if (dev->param.refresh_period < 10) - return oldest; - - /* - * Fix broken values. - */ - if (dev->refresh_skip > dev->param.refresh_period) - dev->refresh_skip = dev->param.refresh_period; - - if (dev->refresh_skip > 0) - return oldest; - - /* - * Refresh skip is now zero. - * We'll do a refresh this time around.... - * Update the refresh skip and find the oldest block. - */ - dev->refresh_skip = dev->param.refresh_period; - dev->refresh_count++; - bi = dev->block_info; - for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { - - if (bi->block_state == YAFFS_BLOCK_STATE_FULL) { - - if (oldest < 1 || bi->seq_number < oldest_seq) { - oldest = b; - oldest_seq = bi->seq_number; - } - } - bi++; - } - - if (oldest > 0) { - yaffs_trace(YAFFS_TRACE_GC, - "GC refresh count %d selected block %d with seq_number %d", - dev->refresh_count, oldest, oldest_seq); - } - - return oldest; -} - -int yaffs2_checkpt_required(struct yaffs_dev *dev) -{ - int nblocks; - - if (!dev->param.is_yaffs2) - return 0; - - nblocks = dev->internal_end_block - dev->internal_start_block + 1; - - return !dev->param.skip_checkpt_wr && - !dev->read_only && (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS); -} - -int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev) -{ - int retval; - - if (!dev->param.is_yaffs2) - return 0; - - if (!dev->checkpoint_blocks_required && yaffs2_checkpt_required(dev)) { - /* Not a valid value so recalculate */ - int n_bytes = 0; - int n_blocks; - int dev_blocks = - (dev->param.end_block - dev->param.start_block + 1); - - n_bytes += sizeof(struct yaffs_checkpt_validity); - n_bytes += sizeof(struct yaffs_checkpt_dev); - n_bytes += dev_blocks * sizeof(struct yaffs_block_info); - n_bytes += dev_blocks * dev->chunk_bit_stride; - n_bytes += - (sizeof(struct yaffs_checkpt_obj) + - sizeof(u32)) * (dev->n_obj); - n_bytes += (dev->tnode_size + sizeof(u32)) * (dev->n_tnodes); - n_bytes += sizeof(struct yaffs_checkpt_validity); - n_bytes += sizeof(u32); /* checksum */ - - /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */ - - n_blocks = - (n_bytes / - (dev->data_bytes_per_chunk * - dev->param.chunks_per_block)) + 3; - - dev->checkpoint_blocks_required = n_blocks; - } - - retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt; - if (retval < 0) - retval = 0; - return retval; -} - -/*--------------------- Checkpointing --------------------*/ - -static int yaffs2_wr_checkpt_validity_marker(struct yaffs_dev *dev, int head) -{ - struct yaffs_checkpt_validity cp; - - memset(&cp, 0, sizeof(cp)); - - cp.struct_type = sizeof(cp); - cp.magic = YAFFS_MAGIC; - cp.version = YAFFS_CHECKPOINT_VERSION; - cp.head = (head) ? 1 : 0; - - return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ? 1 : 0; -} - -static int yaffs2_rd_checkpt_validity_marker(struct yaffs_dev *dev, int head) -{ - struct yaffs_checkpt_validity cp; - int ok; - - ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); - - if (ok) - ok = (cp.struct_type == sizeof(cp)) && - (cp.magic == YAFFS_MAGIC) && - (cp.version == YAFFS_CHECKPOINT_VERSION) && - (cp.head == ((head) ? 1 : 0)); - return ok ? 1 : 0; -} - -static void yaffs2_dev_to_checkpt_dev(struct yaffs_checkpt_dev *cp, - struct yaffs_dev *dev) -{ - cp->n_erased_blocks = dev->n_erased_blocks; - cp->alloc_block = dev->alloc_block; - cp->alloc_page = dev->alloc_page; - cp->n_free_chunks = dev->n_free_chunks; - - cp->n_deleted_files = dev->n_deleted_files; - cp->n_unlinked_files = dev->n_unlinked_files; - cp->n_bg_deletions = dev->n_bg_deletions; - cp->seq_number = dev->seq_number; - -} - -static void yaffs_checkpt_dev_to_dev(struct yaffs_dev *dev, - struct yaffs_checkpt_dev *cp) -{ - dev->n_erased_blocks = cp->n_erased_blocks; - dev->alloc_block = cp->alloc_block; - dev->alloc_page = cp->alloc_page; - dev->n_free_chunks = cp->n_free_chunks; - - dev->n_deleted_files = cp->n_deleted_files; - dev->n_unlinked_files = cp->n_unlinked_files; - dev->n_bg_deletions = cp->n_bg_deletions; - dev->seq_number = cp->seq_number; -} - -static int yaffs2_wr_checkpt_dev(struct yaffs_dev *dev) -{ - struct yaffs_checkpt_dev cp; - u32 n_bytes; - u32 n_blocks = - (dev->internal_end_block - dev->internal_start_block + 1); - - int ok; - - /* Write device runtime values */ - yaffs2_dev_to_checkpt_dev(&cp, dev); - cp.struct_type = sizeof(cp); - - ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); - - /* Write block info */ - if (ok) { - n_bytes = n_blocks * sizeof(struct yaffs_block_info); - ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == - n_bytes); - } - - /* Write chunk bits */ - if (ok) { - n_bytes = n_blocks * dev->chunk_bit_stride; - ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == - n_bytes); - } - return ok ? 1 : 0; - -} - -static int yaffs2_rd_checkpt_dev(struct yaffs_dev *dev) -{ - struct yaffs_checkpt_dev cp; - u32 n_bytes; - u32 n_blocks = - (dev->internal_end_block - dev->internal_start_block + 1); - - int ok; - - ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); - if (!ok) - return 0; - - if (cp.struct_type != sizeof(cp)) - return 0; - - yaffs_checkpt_dev_to_dev(dev, &cp); - - n_bytes = n_blocks * sizeof(struct yaffs_block_info); - - ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes); - - if (!ok) - return 0; - n_bytes = n_blocks * dev->chunk_bit_stride; - - ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes); - - return ok ? 1 : 0; -} - -static void yaffs2_obj_checkpt_obj(struct yaffs_checkpt_obj *cp, - struct yaffs_obj *obj) -{ - - cp->obj_id = obj->obj_id; - cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0; - cp->hdr_chunk = obj->hdr_chunk; - cp->variant_type = obj->variant_type; - cp->deleted = obj->deleted; - cp->soft_del = obj->soft_del; - cp->unlinked = obj->unlinked; - cp->fake = obj->fake; - cp->rename_allowed = obj->rename_allowed; - cp->unlink_allowed = obj->unlink_allowed; - cp->serial = obj->serial; - cp->n_data_chunks = obj->n_data_chunks; - - if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) - cp->size_or_equiv_obj = obj->variant.file_variant.file_size; - else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) - cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id; -} - -static int taffs2_checkpt_obj_to_obj(struct yaffs_obj *obj, - struct yaffs_checkpt_obj *cp) -{ - - struct yaffs_obj *parent; - - if (obj->variant_type != cp->variant_type) { - yaffs_trace(YAFFS_TRACE_ERROR, - "Checkpoint read object %d type %d chunk %d does not match existing object type %d", - cp->obj_id, cp->variant_type, cp->hdr_chunk, - obj->variant_type); - return 0; - } - - obj->obj_id = cp->obj_id; - - if (cp->parent_id) - parent = yaffs_find_or_create_by_number(obj->my_dev, - cp->parent_id, - YAFFS_OBJECT_TYPE_DIRECTORY); - else - parent = NULL; - - if (parent) { - if (parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Checkpoint read object %d parent %d type %d chunk %d Parent type, %d, not directory", - cp->obj_id, cp->parent_id, - cp->variant_type, cp->hdr_chunk, - parent->variant_type); - return 0; - } - yaffs_add_obj_to_dir(parent, obj); - } - - obj->hdr_chunk = cp->hdr_chunk; - obj->variant_type = cp->variant_type; - obj->deleted = cp->deleted; - obj->soft_del = cp->soft_del; - obj->unlinked = cp->unlinked; - obj->fake = cp->fake; - obj->rename_allowed = cp->rename_allowed; - obj->unlink_allowed = cp->unlink_allowed; - obj->serial = cp->serial; - obj->n_data_chunks = cp->n_data_chunks; - - if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) - obj->variant.file_variant.file_size = cp->size_or_equiv_obj; - else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) - obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj; - - if (obj->hdr_chunk > 0) - obj->lazy_loaded = 1; - return 1; -} - -static int yaffs2_checkpt_tnode_worker(struct yaffs_obj *in, - struct yaffs_tnode *tn, u32 level, - int chunk_offset) -{ - int i; - struct yaffs_dev *dev = in->my_dev; - int ok = 1; - - if (tn) { - if (level > 0) { - - for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) { - if (tn->internal[i]) { - ok = yaffs2_checkpt_tnode_worker(in, - tn-> - internal - [i], - level - - 1, - (chunk_offset - << - YAFFS_TNODES_INTERNAL_BITS) - + i); - } - } - } else if (level == 0) { - u32 base_offset = - chunk_offset << YAFFS_TNODES_LEVEL0_BITS; - ok = (yaffs2_checkpt_wr - (dev, &base_offset, - sizeof(base_offset)) == sizeof(base_offset)); - if (ok) - ok = (yaffs2_checkpt_wr - (dev, tn, - dev->tnode_size) == dev->tnode_size); - } - } - - return ok; - -} - -static int yaffs2_wr_checkpt_tnodes(struct yaffs_obj *obj) -{ - u32 end_marker = ~0; - int ok = 1; - - if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) { - ok = yaffs2_checkpt_tnode_worker(obj, - obj->variant.file_variant.top, - obj->variant.file_variant. - top_level, 0); - if (ok) - ok = (yaffs2_checkpt_wr - (obj->my_dev, &end_marker, - sizeof(end_marker)) == sizeof(end_marker)); - } - - return ok ? 1 : 0; -} - -static int yaffs2_rd_checkpt_tnodes(struct yaffs_obj *obj) -{ - u32 base_chunk; - int ok = 1; - struct yaffs_dev *dev = obj->my_dev; - struct yaffs_file_var *file_stuct_ptr = &obj->variant.file_variant; - struct yaffs_tnode *tn; - int nread = 0; - - ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) == - sizeof(base_chunk)); - - while (ok && (~base_chunk)) { - nread++; - /* Read level 0 tnode */ - - tn = yaffs_get_tnode(dev); - if (tn) { - ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) == - dev->tnode_size); - } else { - ok = 0; - } - - if (tn && ok) - ok = yaffs_add_find_tnode_0(dev, - file_stuct_ptr, - base_chunk, tn) ? 1 : 0; - - if (ok) - ok = (yaffs2_checkpt_rd - (dev, &base_chunk, - sizeof(base_chunk)) == sizeof(base_chunk)); - - } - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "Checkpoint read tnodes %d records, last %d. ok %d", - nread, base_chunk, ok); - - return ok ? 1 : 0; -} - -static int yaffs2_wr_checkpt_objs(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj; - struct yaffs_checkpt_obj cp; - int i; - int ok = 1; - struct list_head *lh; - - /* Iterate through the objects in each hash entry, - * dumping them to the checkpointing stream. - */ - - for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) { - list_for_each(lh, &dev->obj_bucket[i].list) { - if (lh) { - obj = - list_entry(lh, struct yaffs_obj, hash_link); - if (!obj->defered_free) { - yaffs2_obj_checkpt_obj(&cp, obj); - cp.struct_type = sizeof(cp); - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "Checkpoint write object %d parent %d type %d chunk %d obj addr %p", - cp.obj_id, cp.parent_id, - cp.variant_type, cp.hdr_chunk, obj); - - ok = (yaffs2_checkpt_wr - (dev, &cp, - sizeof(cp)) == sizeof(cp)); - - if (ok - && obj->variant_type == - YAFFS_OBJECT_TYPE_FILE) - ok = yaffs2_wr_checkpt_tnodes - (obj); - } - } - } - } - - /* Dump end of list */ - memset(&cp, 0xFF, sizeof(struct yaffs_checkpt_obj)); - cp.struct_type = sizeof(cp); - - if (ok) - ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); - - return ok ? 1 : 0; -} - -static int yaffs2_rd_checkpt_objs(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj; - struct yaffs_checkpt_obj cp; - int ok = 1; - int done = 0; - struct yaffs_obj *hard_list = NULL; - - while (ok && !done) { - ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); - if (cp.struct_type != sizeof(cp)) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "struct size %d instead of %d ok %d", - cp.struct_type, (int)sizeof(cp), ok); - ok = 0; - } - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "Checkpoint read object %d parent %d type %d chunk %d ", - cp.obj_id, cp.parent_id, cp.variant_type, - cp.hdr_chunk); - - if (ok && cp.obj_id == ~0) { - done = 1; - } else if (ok) { - obj = - yaffs_find_or_create_by_number(dev, cp.obj_id, - cp.variant_type); - if (obj) { - ok = taffs2_checkpt_obj_to_obj(obj, &cp); - if (!ok) - break; - if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) { - ok = yaffs2_rd_checkpt_tnodes(obj); - } else if (obj->variant_type == - YAFFS_OBJECT_TYPE_HARDLINK) { - obj->hard_links.next = - (struct list_head *)hard_list; - hard_list = obj; - } - } else { - ok = 0; - } - } - } - - if (ok) - yaffs_link_fixup(dev, hard_list); - - return ok ? 1 : 0; -} - -static int yaffs2_wr_checkpt_sum(struct yaffs_dev *dev) -{ - u32 checkpt_sum; - int ok; - - yaffs2_get_checkpt_sum(dev, &checkpt_sum); - - ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) == - sizeof(checkpt_sum)); - - if (!ok) - return 0; - - return 1; -} - -static int yaffs2_rd_checkpt_sum(struct yaffs_dev *dev) -{ - u32 checkpt_sum0; - u32 checkpt_sum1; - int ok; - - yaffs2_get_checkpt_sum(dev, &checkpt_sum0); - - ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) == - sizeof(checkpt_sum1)); - - if (!ok) - return 0; - - if (checkpt_sum0 != checkpt_sum1) - return 0; - - return 1; -} - -static int yaffs2_wr_checkpt_data(struct yaffs_dev *dev) -{ - int ok = 1; - - if (!yaffs2_checkpt_required(dev)) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "skipping checkpoint write"); - ok = 0; - } - - if (ok) - ok = yaffs2_checkpt_open(dev, 1); - - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "write checkpoint validity"); - ok = yaffs2_wr_checkpt_validity_marker(dev, 1); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "write checkpoint device"); - ok = yaffs2_wr_checkpt_dev(dev); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "write checkpoint objects"); - ok = yaffs2_wr_checkpt_objs(dev); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "write checkpoint validity"); - ok = yaffs2_wr_checkpt_validity_marker(dev, 0); - } - - if (ok) - ok = yaffs2_wr_checkpt_sum(dev); - - if (!yaffs_checkpt_close(dev)) - ok = 0; - - if (ok) - dev->is_checkpointed = 1; - else - dev->is_checkpointed = 0; - - return dev->is_checkpointed; -} - -static int yaffs2_rd_checkpt_data(struct yaffs_dev *dev) -{ - int ok = 1; - - if (!dev->param.is_yaffs2) - ok = 0; - - if (ok && dev->param.skip_checkpt_rd) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "skipping checkpoint read"); - ok = 0; - } - - if (ok) - ok = yaffs2_checkpt_open(dev, 0); /* open for read */ - - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "read checkpoint validity"); - ok = yaffs2_rd_checkpt_validity_marker(dev, 1); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "read checkpoint device"); - ok = yaffs2_rd_checkpt_dev(dev); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "read checkpoint objects"); - ok = yaffs2_rd_checkpt_objs(dev); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "read checkpoint validity"); - ok = yaffs2_rd_checkpt_validity_marker(dev, 0); - } - - if (ok) { - ok = yaffs2_rd_checkpt_sum(dev); - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "read checkpoint checksum %d", ok); - } - - if (!yaffs_checkpt_close(dev)) - ok = 0; - - if (ok) - dev->is_checkpointed = 1; - else - dev->is_checkpointed = 0; - - return ok ? 1 : 0; - -} - -void yaffs2_checkpt_invalidate(struct yaffs_dev *dev) -{ - if (dev->is_checkpointed || dev->blocks_in_checkpt > 0) { - dev->is_checkpointed = 0; - yaffs2_checkpt_invalidate_stream(dev); - } - if (dev->param.sb_dirty_fn) - dev->param.sb_dirty_fn(dev); -} - -int yaffs_checkpoint_save(struct yaffs_dev *dev) -{ - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "save entry: is_checkpointed %d", - dev->is_checkpointed); - - yaffs_verify_objects(dev); - yaffs_verify_blocks(dev); - yaffs_verify_free_chunks(dev); - - if (!dev->is_checkpointed) { - yaffs2_checkpt_invalidate(dev); - yaffs2_wr_checkpt_data(dev); - } - - yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT, - "save exit: is_checkpointed %d", - dev->is_checkpointed); - - return dev->is_checkpointed; -} - -int yaffs2_checkpt_restore(struct yaffs_dev *dev) -{ - int retval; - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "restore entry: is_checkpointed %d", - dev->is_checkpointed); - - retval = yaffs2_rd_checkpt_data(dev); - - if (dev->is_checkpointed) { - yaffs_verify_objects(dev); - yaffs_verify_blocks(dev); - yaffs_verify_free_chunks(dev); - } - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "restore exit: is_checkpointed %d", - dev->is_checkpointed); - - return retval; -} - -int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size) -{ - /* if new_size > old_file_size. - * We're going to be writing a hole. - * If the hole is small then write zeros otherwise write a start of hole marker. - */ - - loff_t old_file_size; - int increase; - int small_hole; - int result = YAFFS_OK; - struct yaffs_dev *dev = NULL; - - u8 *local_buffer = NULL; - - int small_increase_ok = 0; - - if (!obj) - return YAFFS_FAIL; - - if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE) - return YAFFS_FAIL; - - dev = obj->my_dev; - - /* Bail out if not yaffs2 mode */ - if (!dev->param.is_yaffs2) - return YAFFS_OK; - - old_file_size = obj->variant.file_variant.file_size; - - if (new_size <= old_file_size) - return YAFFS_OK; - - increase = new_size - old_file_size; - - if (increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk && - yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1)) - small_hole = 1; - else - small_hole = 0; - - if (small_hole) - local_buffer = yaffs_get_temp_buffer(dev, __LINE__); - - if (local_buffer) { - /* fill hole with zero bytes */ - int pos = old_file_size; - int this_write; - int written; - memset(local_buffer, 0, dev->data_bytes_per_chunk); - small_increase_ok = 1; - - while (increase > 0 && small_increase_ok) { - this_write = increase; - if (this_write > dev->data_bytes_per_chunk) - this_write = dev->data_bytes_per_chunk; - written = - yaffs_do_file_wr(obj, local_buffer, pos, this_write, - 0); - if (written == this_write) { - pos += this_write; - increase -= this_write; - } else { - small_increase_ok = 0; - } - } - - yaffs_release_temp_buffer(dev, local_buffer, __LINE__); - - /* If we were out of space then reverse any chunks we've added */ - if (!small_increase_ok) - yaffs_resize_file_down(obj, old_file_size); - } - - if (!small_increase_ok && - obj->parent && - obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED && - obj->parent->obj_id != YAFFS_OBJECTID_DELETED) { - /* Write a hole start header with the old file size */ - yaffs_update_oh(obj, NULL, 0, 1, 0, NULL); - } - - return result; - -} - -struct yaffs_block_index { - int seq; - int block; -}; - -static int yaffs2_ybicmp(const void *a, const void *b) -{ - int aseq = ((struct yaffs_block_index *)a)->seq; - int bseq = ((struct yaffs_block_index *)b)->seq; - int ablock = ((struct yaffs_block_index *)a)->block; - int bblock = ((struct yaffs_block_index *)b)->block; - if (aseq == bseq) - return ablock - bblock; - else - return aseq - bseq; -} - -int yaffs2_scan_backwards(struct yaffs_dev *dev) -{ - struct yaffs_ext_tags tags; - int blk; - int block_iter; - int start_iter; - int end_iter; - int n_to_scan = 0; - - int chunk; - int result; - int c; - int deleted; - enum yaffs_block_state state; - struct yaffs_obj *hard_list = NULL; - struct yaffs_block_info *bi; - u32 seq_number; - struct yaffs_obj_hdr *oh; - struct yaffs_obj *in; - struct yaffs_obj *parent; - int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; - int is_unlinked; - u8 *chunk_data; - - int file_size; - int is_shrink; - int found_chunks; - int equiv_id; - int alloc_failed = 0; - - struct yaffs_block_index *block_index = NULL; - int alt_block_index = 0; - - yaffs_trace(YAFFS_TRACE_SCAN, - "yaffs2_scan_backwards starts intstartblk %d intendblk %d...", - dev->internal_start_block, dev->internal_end_block); - - dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER; - - block_index = kmalloc(n_blocks * sizeof(struct yaffs_block_index), - GFP_NOFS); - - if (!block_index) { - block_index = - vmalloc(n_blocks * sizeof(struct yaffs_block_index)); - alt_block_index = 1; - } - - if (!block_index) { - yaffs_trace(YAFFS_TRACE_SCAN, - "yaffs2_scan_backwards() could not allocate block index!" - ); - return YAFFS_FAIL; - } - - dev->blocks_in_checkpt = 0; - - chunk_data = yaffs_get_temp_buffer(dev, __LINE__); - - /* Scan all the blocks to determine their state */ - bi = dev->block_info; - for (blk = dev->internal_start_block; blk <= dev->internal_end_block; - blk++) { - yaffs_clear_chunk_bits(dev, blk); - bi->pages_in_use = 0; - bi->soft_del_pages = 0; - - yaffs_query_init_block_state(dev, blk, &state, &seq_number); - - bi->block_state = state; - bi->seq_number = seq_number; - - if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) - bi->block_state = state = YAFFS_BLOCK_STATE_CHECKPOINT; - if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK) - bi->block_state = state = YAFFS_BLOCK_STATE_DEAD; - - yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, - "Block scanning block %d state %d seq %d", - blk, state, seq_number); - - if (state == YAFFS_BLOCK_STATE_CHECKPOINT) { - dev->blocks_in_checkpt++; - - } else if (state == YAFFS_BLOCK_STATE_DEAD) { - yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, - "block %d is bad", blk); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty "); - dev->n_erased_blocks++; - dev->n_free_chunks += dev->param.chunks_per_block; - } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - - /* Determine the highest sequence number */ - if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER && - seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) { - - block_index[n_to_scan].seq = seq_number; - block_index[n_to_scan].block = blk; - - n_to_scan++; - - if (seq_number >= dev->seq_number) - dev->seq_number = seq_number; - } else { - /* TODO: Nasty sequence number! */ - yaffs_trace(YAFFS_TRACE_SCAN, - "Block scanning block %d has bad sequence number %d", - blk, seq_number); - - } - } - bi++; - } - - yaffs_trace(YAFFS_TRACE_SCAN, "%d blocks to be sorted...", n_to_scan); - - cond_resched(); - - /* Sort the blocks by sequence number */ - sort(block_index, n_to_scan, sizeof(struct yaffs_block_index), - yaffs2_ybicmp, NULL); - - cond_resched(); - - yaffs_trace(YAFFS_TRACE_SCAN, "...done"); - - /* Now scan the blocks looking at the data. */ - start_iter = 0; - end_iter = n_to_scan - 1; - yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "%d blocks to scan", n_to_scan); - - /* For each block.... backwards */ - for (block_iter = end_iter; !alloc_failed && block_iter >= start_iter; - block_iter--) { - /* Cooperative multitasking! This loop can run for so - long that watchdog timers expire. */ - cond_resched(); - - /* get the block to scan in the correct order */ - blk = block_index[block_iter].block; - - bi = yaffs_get_block_info(dev, blk); - - state = bi->block_state; - - deleted = 0; - - /* For each chunk in each block that needs scanning.... */ - found_chunks = 0; - for (c = dev->param.chunks_per_block - 1; - !alloc_failed && c >= 0 && - (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - state == YAFFS_BLOCK_STATE_ALLOCATING); c--) { - /* Scan backwards... - * Read the tags and decide what to do - */ - - chunk = blk * dev->param.chunks_per_block + c; - - result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, - &tags); - - /* Let's have a good look at this chunk... */ - - if (!tags.chunk_used) { - /* An unassigned chunk in the block. - * If there are used chunks after this one, then - * it is a chunk that was skipped due to failing the erased - * check. Just skip it so that it can be deleted. - * But, more typically, We get here when this is an unallocated - * chunk and his means that either the block is empty or - * this is the one being allocated from - */ - - if (found_chunks) { - /* This is a chunk that was skipped due to failing the erased check */ - } else if (c == 0) { - /* We're looking at the first chunk in the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->n_erased_blocks++; - } else { - if (state == - YAFFS_BLOCK_STATE_NEEDS_SCANNING - || state == - YAFFS_BLOCK_STATE_ALLOCATING) { - if (dev->seq_number == - bi->seq_number) { - /* this is the block being allocated from */ - - yaffs_trace(YAFFS_TRACE_SCAN, - " Allocating from %d %d", - blk, c); - - state = - YAFFS_BLOCK_STATE_ALLOCATING; - dev->alloc_block = blk; - dev->alloc_page = c; - dev-> - alloc_block_finder = - blk; - } else { - /* This is a partially written block that is not - * the current allocation block. - */ - - yaffs_trace(YAFFS_TRACE_SCAN, - "Partially written block %d detected", - blk); - } - } - } - - dev->n_free_chunks++; - - } else if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED) { - yaffs_trace(YAFFS_TRACE_SCAN, - " Unfixed ECC in chunk(%d:%d), chunk ignored", - blk, c); - - dev->n_free_chunks++; - - } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID || - tags.chunk_id > YAFFS_MAX_CHUNK_ID || - (tags.chunk_id > 0 - && tags.n_bytes > dev->data_bytes_per_chunk) - || tags.seq_number != bi->seq_number) { - yaffs_trace(YAFFS_TRACE_SCAN, - "Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored", - blk, c, tags.obj_id, - tags.chunk_id, tags.n_bytes); - - dev->n_free_chunks++; - - } else if (tags.chunk_id > 0) { - /* chunk_id > 0 so it is a data chunk... */ - unsigned int endpos; - u32 chunk_base = - (tags.chunk_id - - 1) * dev->data_bytes_per_chunk; - - found_chunks = 1; - - yaffs_set_chunk_bit(dev, blk, c); - bi->pages_in_use++; - - in = yaffs_find_or_create_by_number(dev, - tags.obj_id, - YAFFS_OBJECT_TYPE_FILE); - if (!in) { - /* Out of memory */ - alloc_failed = 1; - } - - if (in && - in->variant_type == YAFFS_OBJECT_TYPE_FILE - && chunk_base < - in->variant.file_variant.shrink_size) { - /* This has not been invalidated by a resize */ - if (!yaffs_put_chunk_in_file - (in, tags.chunk_id, chunk, -1)) { - alloc_failed = 1; - } - - /* File size is calculated by looking at the data chunks if we have not - * seen an object header yet. Stop this practice once we find an object header. - */ - endpos = chunk_base + tags.n_bytes; - - if (!in->valid && /* have not got an object header yet */ - in->variant.file_variant. - scanned_size < endpos) { - in->variant.file_variant. - scanned_size = endpos; - in->variant.file_variant. - file_size = endpos; - } - - } else if (in) { - /* This chunk has been invalidated by a resize, or a past file deletion - * so delete the chunk*/ - yaffs_chunk_del(dev, chunk, 1, - __LINE__); - - } - } else { - /* chunk_id == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make the object - */ - found_chunks = 1; - - yaffs_set_chunk_bit(dev, blk, c); - bi->pages_in_use++; - - oh = NULL; - in = NULL; - - if (tags.extra_available) { - in = yaffs_find_or_create_by_number(dev, - tags. - obj_id, - tags. - extra_obj_type); - if (!in) - alloc_failed = 1; - } - - if (!in || - (!in->valid && dev->param.disable_lazy_load) - || tags.extra_shadows || (!in->valid - && (tags.obj_id == - YAFFS_OBJECTID_ROOT - || tags. - obj_id == - YAFFS_OBJECTID_LOSTNFOUND))) - { - - /* If we don't have valid info then we need to read the chunk - * TODO In future we can probably defer reading the chunk and - * living with invalid data until needed. - */ - - result = yaffs_rd_chunk_tags_nand(dev, - chunk, - chunk_data, - NULL); - - oh = (struct yaffs_obj_hdr *)chunk_data; - - if (dev->param.inband_tags) { - /* Fix up the header if they got corrupted by inband tags */ - oh->shadows_obj = - oh->inband_shadowed_obj_id; - oh->is_shrink = - oh->inband_is_shrink; - } - - if (!in) { - in = yaffs_find_or_create_by_number(dev, tags.obj_id, oh->type); - if (!in) - alloc_failed = 1; - } - - } - - if (!in) { - /* TODO Hoosterman we have a problem! */ - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: Could not make object for object %d at chunk %d during scan", - tags.obj_id, chunk); - continue; - } - - if (in->valid) { - /* We have already filled this one. - * We have a duplicate that will be discarded, but - * we first have to suck out resize info if it is a file. - */ - - if ((in->variant_type == - YAFFS_OBJECT_TYPE_FILE) && ((oh - && - oh-> - type - == - YAFFS_OBJECT_TYPE_FILE) - || - (tags. - extra_available - && - tags. - extra_obj_type - == - YAFFS_OBJECT_TYPE_FILE))) - { - u32 this_size = - (oh) ? oh-> - file_size : - tags.extra_length; - u32 parent_obj_id = - (oh) ? oh->parent_obj_id : - tags.extra_parent_id; - - is_shrink = - (oh) ? oh-> - is_shrink : - tags.extra_is_shrink; - - /* If it is deleted (unlinked at start also means deleted) - * we treat the file size as being zeroed at this point. - */ - if (parent_obj_id == - YAFFS_OBJECTID_DELETED - || parent_obj_id == - YAFFS_OBJECTID_UNLINKED) { - this_size = 0; - is_shrink = 1; - } - - if (is_shrink - && in->variant.file_variant. - shrink_size > this_size) - in->variant. - file_variant. - shrink_size = - this_size; - - if (is_shrink) - bi->has_shrink_hdr = 1; - - } - /* Use existing - destroy this one. */ - yaffs_chunk_del(dev, chunk, 1, - __LINE__); - - } - - if (!in->valid && in->variant_type != - (oh ? oh->type : tags.extra_obj_type)) - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: Bad object type, %d != %d, for object %d at chunk %d during scan", - oh ? - oh->type : tags.extra_obj_type, - in->variant_type, tags.obj_id, - chunk); - - if (!in->valid && - (tags.obj_id == YAFFS_OBJECTID_ROOT || - tags.obj_id == - YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle with directory structure */ - in->valid = 1; - - if (oh) { - - in->yst_mode = oh->yst_mode; - yaffs_load_attribs(in, oh); - in->lazy_loaded = 0; - } else { - in->lazy_loaded = 1; - } - in->hdr_chunk = chunk; - - } else if (!in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->hdr_chunk = chunk; - - if (oh) { - in->variant_type = oh->type; - - in->yst_mode = oh->yst_mode; - yaffs_load_attribs(in, oh); - - if (oh->shadows_obj > 0) - yaffs_handle_shadowed_obj - (dev, - oh->shadows_obj, - 1); - - yaffs_set_obj_name_from_oh(in, - oh); - parent = - yaffs_find_or_create_by_number - (dev, oh->parent_obj_id, - YAFFS_OBJECT_TYPE_DIRECTORY); - - file_size = oh->file_size; - is_shrink = oh->is_shrink; - equiv_id = oh->equiv_id; - - } else { - in->variant_type = - tags.extra_obj_type; - parent = - yaffs_find_or_create_by_number - (dev, tags.extra_parent_id, - YAFFS_OBJECT_TYPE_DIRECTORY); - file_size = tags.extra_length; - is_shrink = - tags.extra_is_shrink; - equiv_id = tags.extra_equiv_id; - in->lazy_loaded = 1; - - } - in->dirty = 0; - - if (!parent) - alloc_failed = 1; - - /* directory stuff... - * hook up to parent - */ - - if (parent && parent->variant_type == - YAFFS_OBJECT_TYPE_UNKNOWN) { - /* Set up as a directory */ - parent->variant_type = - YAFFS_OBJECT_TYPE_DIRECTORY; - INIT_LIST_HEAD(&parent-> - variant.dir_variant.children); - } else if (!parent - || parent->variant_type != - YAFFS_OBJECT_TYPE_DIRECTORY) { - /* Hoosterman, another problem.... - * We're trying to use a non-directory as a directory - */ - - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." - ); - parent = dev->lost_n_found; - } - - yaffs_add_obj_to_dir(parent, in); - - is_unlinked = (parent == dev->del_dir) - || (parent == dev->unlinked_dir); - - if (is_shrink) { - /* Mark the block as having a shrink header */ - bi->has_shrink_hdr = 1; - } - - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent object is scanned - * we put them all in a list. - * After scanning is complete, we should have all the objects, so we run - * through this list and fix up all the chains. - */ - - switch (in->variant_type) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - - if (in->variant. - file_variant.scanned_size < - file_size) { - /* This covers the case where the file size is greater - * than where the data is - * This will happen if the file is resized to be larger - * than its current data extents. - */ - in->variant. - file_variant. - file_size = - file_size; - in->variant. - file_variant. - scanned_size = - file_size; - } - - if (in->variant.file_variant. - shrink_size > file_size) - in->variant. - file_variant. - shrink_size = - file_size; - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - if (!is_unlinked) { - in->variant. - hardlink_variant. - equiv_id = equiv_id; - in->hard_links.next = - (struct list_head *) - hard_list; - hard_list = in; - } - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - if (oh) { - in->variant. - symlink_variant. - alias = - yaffs_clone_str(oh-> - alias); - if (!in->variant. - symlink_variant. - alias) - alloc_failed = - 1; - } - break; - } - - } - - } - - } /* End of scanning for each chunk */ - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - /* If we got this far while scanning, then the block is fully allocated. */ - state = YAFFS_BLOCK_STATE_FULL; - } - - bi->block_state = state; - - /* Now let's see if it was dirty */ - if (bi->pages_in_use == 0 && - !bi->has_shrink_hdr && - bi->block_state == YAFFS_BLOCK_STATE_FULL) { - yaffs_block_became_dirty(dev, blk); - } - - } - - yaffs_skip_rest_of_block(dev); - - if (alt_block_index) - vfree(block_index); - else - kfree(block_index); - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add these - * hardlinks. - */ - yaffs_link_fixup(dev, hard_list); - - yaffs_release_temp_buffer(dev, chunk_data, __LINE__); - - if (alloc_failed) - return YAFFS_FAIL; - - yaffs_trace(YAFFS_TRACE_SCAN, "yaffs2_scan_backwards ends"); - - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_yaffs2.h b/fs/yaffs2/yaffs_yaffs2.h deleted file mode 100644 index e1a9287..0000000 --- a/fs/yaffs2/yaffs_yaffs2.h +++ /dev/null @@ -1,39 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_YAFFS2_H__ -#define __YAFFS_YAFFS2_H__ - -#include "yaffs_guts.h" - -void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev); -void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev); -void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev, - struct yaffs_block_info *bi); -void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no, - struct yaffs_block_info *bi); -int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi); -u32 yaffs2_find_refresh_block(struct yaffs_dev *dev); -int yaffs2_checkpt_required(struct yaffs_dev *dev); -int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev); - -void yaffs2_checkpt_invalidate(struct yaffs_dev *dev); -int yaffs2_checkpt_save(struct yaffs_dev *dev); -int yaffs2_checkpt_restore(struct yaffs_dev *dev); - -int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size); -int yaffs2_scan_backwards(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yportenv.h b/fs/yaffs2/yportenv.h deleted file mode 100644 index 8183425..0000000 --- a/fs/yaffs2/yportenv.h +++ /dev/null @@ -1,70 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YPORTENV_LINUX_H__ -#define __YPORTENV_LINUX_H__ - -#include <linux/version.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> -#include <linux/xattr.h> -#include <linux/list.h> -#include <linux/types.h> -#include <linux/fs.h> -#include <linux/stat.h> -#include <linux/sort.h> -#include <linux/bitops.h> - -#define YCHAR char -#define YUCHAR unsigned char -#define _Y(x) x - -#define YAFFS_LOSTNFOUND_NAME "lost+found" -#define YAFFS_LOSTNFOUND_PREFIX "obj" - - -#define YAFFS_ROOT_MODE 0755 -#define YAFFS_LOSTNFOUND_MODE 0700 - -#define Y_CURRENT_TIME CURRENT_TIME.tv_sec -#define Y_TIME_CONVERT(x) (x).tv_sec - -#define compile_time_assertion(assertion) \ - ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; }) - - -#ifndef Y_DUMP_STACK -#define Y_DUMP_STACK() dump_stack() -#endif - -#define yaffs_trace(msk, fmt, ...) do { \ - if(yaffs_trace_mask & (msk)) \ - printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__); \ -} while(0) - -#ifndef YBUG -#define YBUG() do {\ - yaffs_trace(YAFFS_TRACE_BUG,\ - "bug " __FILE__ " %d",\ - __LINE__);\ - Y_DUMP_STACK();\ -} while (0) -#endif - -#endif |