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-rw-r--r--fs/yaffs2/yaffs_verify.c535
1 files changed, 0 insertions, 535 deletions
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;
-}
-