From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- fs/ufs/super.c | 1347 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1347 insertions(+) create mode 100644 fs/ufs/super.c (limited to 'fs/ufs/super.c') diff --git a/fs/ufs/super.c b/fs/ufs/super.c new file mode 100644 index 0000000..f036d69 --- /dev/null +++ b/fs/ufs/super.c @@ -0,0 +1,1347 @@ +/* + * linux/fs/ufs/super.c + * + * Copyright (C) 1998 + * Daniel Pirkl + * Charles University, Faculty of Mathematics and Physics + */ + +/* Derived from + * + * linux/fs/ext2/super.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * from + * + * linux/fs/minix/inode.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * Big-endian to little-endian byte-swapping/bitmaps by + * David S. Miller (davem@caip.rutgers.edu), 1995 + */ + +/* + * Inspired by + * + * linux/fs/ufs/super.c + * + * Copyright (C) 1996 + * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) + * Laboratory for Computer Science Research Computing Facility + * Rutgers, The State University of New Jersey + * + * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) + * + * Kernel module support added on 96/04/26 by + * Stefan Reinauer + * + * Module usage counts added on 96/04/29 by + * Gertjan van Wingerde + * + * Clean swab support on 19970406 by + * Francois-Rene Rideau + * + * 4.4BSD (FreeBSD) support added on February 1st 1998 by + * Niels Kristian Bech Jensen partially based + * on code by Martin von Loewis . + * + * NeXTstep support added on February 5th 1998 by + * Niels Kristian Bech Jensen . + * + * write support Daniel Pirkl 1998 + * + * HP/UX hfs filesystem support added by + * Martin K. Petersen , August 1999 + * + * UFS2 (of FreeBSD 5.x) support added by + * Niraj Kumar , Jan 2004 + * + */ + + +#include +#include +#include + +#include + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "swab.h" +#include "util.h" + +#undef UFS_SUPER_DEBUG +#undef UFS_SUPER_DEBUG_MORE + + +#undef UFS_SUPER_DEBUG_MORE +#ifdef UFS_SUPER_DEBUG +#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; +#else +#define UFSD(x) +#endif + +#ifdef UFS_SUPER_DEBUG_MORE +/* + * Print contents of ufs_super_block, useful for debugging + */ +void ufs_print_super_stuff(struct super_block *sb, + struct ufs_super_block_first * usb1, + struct ufs_super_block_second * usb2, + struct ufs_super_block_third * usb3) +{ + printk("ufs_print_super_stuff\n"); + printk("size of usb: %u\n", sizeof(struct ufs_super_block)); + printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic)); + printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); + printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); + printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); + printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); + printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset)); + printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask)); + printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); + printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); + printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); + printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); + printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); + printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); + printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift)); + printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); + printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); + printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); + printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); + printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); + printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); + printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); + printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); + printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); + printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); + printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb)); + printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize)); + printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat)); + printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); + printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); + printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); + printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); + printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); + printk("\n"); +} + +/* + * Print contents of ufs2 ufs_super_block, useful for debugging + */ +void ufs2_print_super_stuff( + struct super_block *sb, + struct ufs_super_block *usb) +{ + printk("ufs_print_super_stuff\n"); + printk("size of usb: %u\n", sizeof(struct ufs_super_block)); + printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb->fs_magic)); + printk(" fs_size: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size)); + printk(" fs_dsize: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize)); + printk(" bsize: %u\n", fs32_to_cpu(usb, usb->fs_bsize)); + printk(" fsize: %u\n", fs32_to_cpu(usb, usb->fs_fsize)); + printk(" fs_volname: %s\n", usb->fs_u11.fs_u2.fs_volname); + printk(" fs_fsmnt: %s\n", usb->fs_u11.fs_u2.fs_fsmnt); + printk(" fs_sblockloc: %u\n",fs64_to_cpu(sb, + usb->fs_u11.fs_u2.fs_sblockloc)); + printk(" cs_ndir(No of dirs): %u\n",fs64_to_cpu(sb, + usb->fs_u11.fs_u2.fs_cstotal.cs_ndir)); + printk(" cs_nbfree(No of free blocks): %u\n",fs64_to_cpu(sb, + usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)); + printk("\n"); +} + +/* + * Print contents of ufs_cylinder_group, useful for debugging + */ +void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg) +{ + printk("\nufs_print_cylinder_stuff\n"); + printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group)); + printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); + printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); + printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); + printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); + printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); + printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); + printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); + printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); + printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); + printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); + printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); + printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); + printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); + printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", + fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), + fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), + fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), + fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); + printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); + printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); + printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); + printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); + printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); + printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); + printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); + printk(" nclusterblks %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); + printk("\n"); +} +#endif /* UFS_SUPER_DEBUG_MORE */ + +static struct super_operations ufs_super_ops; + +static char error_buf[1024]; + +void ufs_error (struct super_block * sb, const char * function, + const char * fmt, ...) +{ + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + va_list args; + + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + + if (!(sb->s_flags & MS_RDONLY)) { + usb1->fs_clean = UFS_FSBAD; + ubh_mark_buffer_dirty(USPI_UBH); + sb->s_dirt = 1; + sb->s_flags |= MS_RDONLY; + } + va_start (args, fmt); + vsprintf (error_buf, fmt, args); + va_end (args); + switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { + case UFS_MOUNT_ONERROR_PANIC: + panic ("UFS-fs panic (device %s): %s: %s\n", + sb->s_id, function, error_buf); + + case UFS_MOUNT_ONERROR_LOCK: + case UFS_MOUNT_ONERROR_UMOUNT: + case UFS_MOUNT_ONERROR_REPAIR: + printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", + sb->s_id, function, error_buf); + } +} + +void ufs_panic (struct super_block * sb, const char * function, + const char * fmt, ...) +{ + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + va_list args; + + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + + if (!(sb->s_flags & MS_RDONLY)) { + usb1->fs_clean = UFS_FSBAD; + ubh_mark_buffer_dirty(USPI_UBH); + sb->s_dirt = 1; + } + va_start (args, fmt); + vsprintf (error_buf, fmt, args); + va_end (args); + sb->s_flags |= MS_RDONLY; + printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", + sb->s_id, function, error_buf); +} + +void ufs_warning (struct super_block * sb, const char * function, + const char * fmt, ...) +{ + va_list args; + + va_start (args, fmt); + vsprintf (error_buf, fmt, args); + va_end (args); + printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", + sb->s_id, function, error_buf); +} + +enum { + Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd, + Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep, + Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock, + Opt_onerror_umount, Opt_onerror_repair, Opt_err +}; + +static match_table_t tokens = { + {Opt_type_old, "ufstype=old"}, + {Opt_type_sunx86, "ufstype=sunx86"}, + {Opt_type_sun, "ufstype=sun"}, + {Opt_type_44bsd, "ufstype=44bsd"}, + {Opt_type_ufs2, "ufstype=ufs2"}, + {Opt_type_ufs2, "ufstype=5xbsd"}, + {Opt_type_hp, "ufstype=hp"}, + {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, + {Opt_type_nextstep, "ufstype=nextstep"}, + {Opt_type_openstep, "ufstype=openstep"}, + {Opt_onerror_panic, "onerror=panic"}, + {Opt_onerror_lock, "onerror=lock"}, + {Opt_onerror_umount, "onerror=umount"}, + {Opt_onerror_repair, "onerror=repair"}, + {Opt_err, NULL} +}; + +static int ufs_parse_options (char * options, unsigned * mount_options) +{ + char * p; + + UFSD(("ENTER\n")) + + if (!options) + return 1; + + while ((p = strsep(&options, ",")) != NULL) { + substring_t args[MAX_OPT_ARGS]; + int token; + if (!*p) + continue; + + token = match_token(p, tokens, args); + switch (token) { + case Opt_type_old: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_OLD); + break; + case Opt_type_sunx86: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_SUNx86); + break; + case Opt_type_sun: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_SUN); + break; + case Opt_type_44bsd: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_44BSD); + break; + case Opt_type_ufs2: + ufs_clear_opt(*mount_options, UFSTYPE); + ufs_set_opt(*mount_options, UFSTYPE_UFS2); + break; + case Opt_type_hp: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_HP); + break; + case Opt_type_nextstepcd: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); + break; + case Opt_type_nextstep: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); + break; + case Opt_type_openstep: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); + break; + case Opt_onerror_panic: + ufs_clear_opt (*mount_options, ONERROR); + ufs_set_opt (*mount_options, ONERROR_PANIC); + break; + case Opt_onerror_lock: + ufs_clear_opt (*mount_options, ONERROR); + ufs_set_opt (*mount_options, ONERROR_LOCK); + break; + case Opt_onerror_umount: + ufs_clear_opt (*mount_options, ONERROR); + ufs_set_opt (*mount_options, ONERROR_UMOUNT); + break; + case Opt_onerror_repair: + printk("UFS-fs: Unable to do repair on error, " + "will lock lock instead\n"); + ufs_clear_opt (*mount_options, ONERROR); + ufs_set_opt (*mount_options, ONERROR_REPAIR); + break; + default: + printk("UFS-fs: Invalid option: \"%s\" " + "or missing value\n", p); + return 0; + } + } + return 1; +} + +/* + * Read on-disk structures associated with cylinder groups + */ +static int ufs_read_cylinder_structures (struct super_block *sb) { + struct ufs_sb_info * sbi = UFS_SB(sb); + struct ufs_sb_private_info * uspi; + struct ufs_super_block *usb; + struct ufs_buffer_head * ubh; + unsigned char * base, * space; + unsigned size, blks, i; + unsigned flags = 0; + + UFSD(("ENTER\n")) + + uspi = sbi->s_uspi; + + usb = (struct ufs_super_block *) + ((struct ufs_buffer_head *)uspi)->bh[0]->b_data; + + flags = UFS_SB(sb)->s_flags; + + /* + * Read cs structures from (usually) first data block + * on the device. + */ + size = uspi->s_cssize; + blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; + base = space = kmalloc(size, GFP_KERNEL); + if (!base) + goto failed; + for (i = 0; i < blks; i += uspi->s_fpb) { + size = uspi->s_bsize; + if (i + uspi->s_fpb > blks) + size = (blks - i) * uspi->s_fsize; + + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + ubh = ubh_bread(sb, + fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size); + if (!ubh) + goto failed; + ubh_ubhcpymem (space, ubh, size); + sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space; + } + else { + ubh = ubh_bread(sb, uspi->s_csaddr + i, size); + if (!ubh) + goto failed; + ubh_ubhcpymem(space, ubh, size); + sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space; + } + space += size; + ubh_brelse (ubh); + ubh = NULL; + } + + /* + * Read cylinder group (we read only first fragment from block + * at this time) and prepare internal data structures for cg caching. + */ + if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) + goto failed; + for (i = 0; i < uspi->s_ncg; i++) + sbi->s_ucg[i] = NULL; + for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { + sbi->s_ucpi[i] = NULL; + sbi->s_cgno[i] = UFS_CGNO_EMPTY; + } + for (i = 0; i < uspi->s_ncg; i++) { + UFSD(("read cg %u\n", i)) + if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) + goto failed; + if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) + goto failed; +#ifdef UFS_SUPER_DEBUG_MORE + ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); +#endif + } + for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { + if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) + goto failed; + sbi->s_cgno[i] = UFS_CGNO_EMPTY; + } + sbi->s_cg_loaded = 0; + UFSD(("EXIT\n")) + return 1; + +failed: + if (base) kfree (base); + if (sbi->s_ucg) { + for (i = 0; i < uspi->s_ncg; i++) + if (sbi->s_ucg[i]) brelse (sbi->s_ucg[i]); + kfree (sbi->s_ucg); + for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) + if (sbi->s_ucpi[i]) kfree (sbi->s_ucpi[i]); + } + UFSD(("EXIT (FAILED)\n")) + return 0; +} + +/* + * Put on-disk structures associated with cylinder groups and + * write them back to disk + */ +static void ufs_put_cylinder_structures (struct super_block *sb) { + struct ufs_sb_info * sbi = UFS_SB(sb); + struct ufs_sb_private_info * uspi; + struct ufs_buffer_head * ubh; + unsigned char * base, * space; + unsigned blks, size, i; + + UFSD(("ENTER\n")) + + uspi = sbi->s_uspi; + + size = uspi->s_cssize; + blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; + base = space = (char*) sbi->s_csp[0]; + for (i = 0; i < blks; i += uspi->s_fpb) { + size = uspi->s_bsize; + if (i + uspi->s_fpb > blks) + size = (blks - i) * uspi->s_fsize; + ubh = ubh_bread(sb, uspi->s_csaddr + i, size); + ubh_memcpyubh (ubh, space, size); + space += size; + ubh_mark_buffer_uptodate (ubh, 1); + ubh_mark_buffer_dirty (ubh); + ubh_brelse (ubh); + } + for (i = 0; i < sbi->s_cg_loaded; i++) { + ufs_put_cylinder (sb, i); + kfree (sbi->s_ucpi[i]); + } + for (; i < UFS_MAX_GROUP_LOADED; i++) + kfree (sbi->s_ucpi[i]); + for (i = 0; i < uspi->s_ncg; i++) + brelse (sbi->s_ucg[i]); + kfree (sbi->s_ucg); + kfree (base); + UFSD(("EXIT\n")) +} + +static int ufs_fill_super(struct super_block *sb, void *data, int silent) +{ + struct ufs_sb_info * sbi; + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_super_block_second * usb2; + struct ufs_super_block_third * usb3; + struct ufs_super_block *usb; + struct ufs_buffer_head * ubh; + struct inode *inode; + unsigned block_size, super_block_size; + unsigned flags; + + uspi = NULL; + ubh = NULL; + flags = 0; + + UFSD(("ENTER\n")) + + sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); + if (!sbi) + goto failed_nomem; + sb->s_fs_info = sbi; + memset(sbi, 0, sizeof(struct ufs_sb_info)); + + UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY))) + +#ifndef CONFIG_UFS_FS_WRITE + if (!(sb->s_flags & MS_RDONLY)) { + printk("ufs was compiled with read-only support, " + "can't be mounted as read-write\n"); + goto failed; + } +#endif + /* + * Set default mount options + * Parse mount options + */ + sbi->s_mount_opt = 0; + ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); + if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { + printk("wrong mount options\n"); + goto failed; + } + if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { + if (!silent) + printk("You didn't specify the type of your ufs filesystem\n\n" + "mount -t ufs -o ufstype=" + "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n" + ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " + "default is ufstype=old\n"); + ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); + } + + sbi->s_uspi = uspi = + kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); + if (!uspi) + goto failed; + + /* Keep 2Gig file limit. Some UFS variants need to override + this but as I don't know which I'll let those in the know loosen + the rules */ + + switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { + case UFS_MOUNT_UFSTYPE_44BSD: + UFSD(("ufstype=44bsd\n")) + uspi->s_fsize = block_size = 512; + uspi->s_fmask = ~(512 - 1); + uspi->s_fshift = 9; + uspi->s_sbsize = super_block_size = 1536; + uspi->s_sbbase = 0; + flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; + break; + case UFS_MOUNT_UFSTYPE_UFS2: + UFSD(("ufstype=ufs2\n")) + uspi->s_fsize = block_size = 512; + uspi->s_fmask = ~(512 - 1); + uspi->s_fshift = 9; + uspi->s_sbsize = super_block_size = 1536; + uspi->s_sbbase = 0; + flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; + if (!(sb->s_flags & MS_RDONLY)) { + printk(KERN_INFO "ufstype=ufs2 is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + + case UFS_MOUNT_UFSTYPE_SUN: + UFSD(("ufstype=sun\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + uspi->s_maxsymlinklen = 56; + flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; + break; + + case UFS_MOUNT_UFSTYPE_SUNx86: + UFSD(("ufstype=sunx86\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + uspi->s_maxsymlinklen = 56; + flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; + break; + + case UFS_MOUNT_UFSTYPE_OLD: + UFSD(("ufstype=old\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; + if (!(sb->s_flags & MS_RDONLY)) { + if (!silent) + printk(KERN_INFO "ufstype=old is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + + case UFS_MOUNT_UFSTYPE_NEXTSTEP: + UFSD(("ufstype=nextstep\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; + if (!(sb->s_flags & MS_RDONLY)) { + if (!silent) + printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + + case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: + UFSD(("ufstype=nextstep-cd\n")) + uspi->s_fsize = block_size = 2048; + uspi->s_fmask = ~(2048 - 1); + uspi->s_fshift = 11; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; + if (!(sb->s_flags & MS_RDONLY)) { + if (!silent) + printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + + case UFS_MOUNT_UFSTYPE_OPENSTEP: + UFSD(("ufstype=openstep\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; + if (!(sb->s_flags & MS_RDONLY)) { + if (!silent) + printk(KERN_INFO "ufstype=openstep is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + + case UFS_MOUNT_UFSTYPE_HP: + UFSD(("ufstype=hp\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; + if (!(sb->s_flags & MS_RDONLY)) { + if (!silent) + printk(KERN_INFO "ufstype=hp is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + default: + if (!silent) + printk("unknown ufstype\n"); + goto failed; + } + +again: + if (!sb_set_blocksize(sb, block_size)) { + printk(KERN_ERR "UFS: failed to set blocksize\n"); + goto failed; + } + + /* + * read ufs super block from device + */ + if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + SBLOCK_UFS2/block_size, super_block_size); + } + else { + ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size); + } + if (!ubh) + goto failed; + + + usb1 = ubh_get_usb_first(USPI_UBH); + usb2 = ubh_get_usb_second(USPI_UBH); + usb3 = ubh_get_usb_third(USPI_UBH); + usb = (struct ufs_super_block *) + ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ; + + /* + * Check ufs magic number + */ + sbi->s_bytesex = BYTESEX_LE; + switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { + case UFS_MAGIC: + case UFS2_MAGIC: + case UFS_MAGIC_LFN: + case UFS_MAGIC_FEA: + case UFS_MAGIC_4GB: + goto magic_found; + } + sbi->s_bytesex = BYTESEX_BE; + switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { + case UFS_MAGIC: + case UFS2_MAGIC: + case UFS_MAGIC_LFN: + case UFS_MAGIC_FEA: + case UFS_MAGIC_4GB: + goto magic_found; + } + + if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) + || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) + || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) + && uspi->s_sbbase < 256) { + ubh_brelse_uspi(uspi); + ubh = NULL; + uspi->s_sbbase += 8; + goto again; + } + if (!silent) + printk("ufs_read_super: bad magic number\n"); + goto failed; + +magic_found: + /* + * Check block and fragment sizes + */ + uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); + uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); + uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); + uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); + uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); + + if (uspi->s_fsize & (uspi->s_fsize - 1)) { + printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", + uspi->s_fsize); + goto failed; + } + if (uspi->s_fsize < 512) { + printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", + uspi->s_fsize); + goto failed; + } + if (uspi->s_fsize > 4096) { + printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", + uspi->s_fsize); + goto failed; + } + if (uspi->s_bsize & (uspi->s_bsize - 1)) { + printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", + uspi->s_bsize); + goto failed; + } + if (uspi->s_bsize < 4096) { + printk(KERN_ERR "ufs_read_super: block size %u is too small\n", + uspi->s_bsize); + goto failed; + } + if (uspi->s_bsize / uspi->s_fsize > 8) { + printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", + uspi->s_bsize / uspi->s_fsize); + goto failed; + } + if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { + ubh_brelse_uspi(uspi); + ubh = NULL; + block_size = uspi->s_fsize; + super_block_size = uspi->s_sbsize; + UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size)) + goto again; + } + +#ifdef UFS_SUPER_DEBUG_MORE + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) + ufs2_print_super_stuff(sb,usb); + else + ufs_print_super_stuff(sb, usb1, usb2, usb3); +#endif + + /* + * Check, if file system was correctly unmounted. + * If not, make it read only. + */ + if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || + ((flags & UFS_ST_MASK) == UFS_ST_OLD) || + (((flags & UFS_ST_MASK) == UFS_ST_SUN || + (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && + (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { + switch(usb1->fs_clean) { + case UFS_FSCLEAN: + UFSD(("fs is clean\n")) + break; + case UFS_FSSTABLE: + UFSD(("fs is stable\n")) + break; + case UFS_FSOSF1: + UFSD(("fs is DEC OSF/1\n")) + break; + case UFS_FSACTIVE: + printk("ufs_read_super: fs is active\n"); + sb->s_flags |= MS_RDONLY; + break; + case UFS_FSBAD: + printk("ufs_read_super: fs is bad\n"); + sb->s_flags |= MS_RDONLY; + break; + default: + printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); + sb->s_flags |= MS_RDONLY; + break; + } + } + else { + printk("ufs_read_super: fs needs fsck\n"); + sb->s_flags |= MS_RDONLY; + } + + /* + * Read ufs_super_block into internal data structures + */ + sb->s_op = &ufs_super_ops; + sb->dq_op = NULL; /***/ + sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); + + uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); + uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); + uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); + uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); + uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); + uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); + + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + uspi->s_u2_size = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size); + uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize); + } + else { + uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); + uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); + } + + uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); + /* s_bsize already set */ + /* s_fsize already set */ + uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); + uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); + uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); + uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); + uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); + uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); + UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, + uspi->s_fshift)); + uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); + uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); + /* s_sbsize already set */ + uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); + uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); + uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); + uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); + uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); + uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); + uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); + uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); + uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); + uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); + uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); + uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); + uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); + uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); + uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); + uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); + uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc); + uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize); + uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); + uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); + uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); + uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); + uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); + uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); + + /* + * Compute another frequently used values + */ + uspi->s_fpbmask = uspi->s_fpb - 1; + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + uspi->s_apbshift = uspi->s_bshift - 3; + } + else { + uspi->s_apbshift = uspi->s_bshift - 2; + } + uspi->s_2apbshift = uspi->s_apbshift * 2; + uspi->s_3apbshift = uspi->s_apbshift * 3; + uspi->s_apb = 1 << uspi->s_apbshift; + uspi->s_2apb = 1 << uspi->s_2apbshift; + uspi->s_3apb = 1 << uspi->s_3apbshift; + uspi->s_apbmask = uspi->s_apb - 1; + uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; + uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; + uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; + uspi->s_bpf = uspi->s_fsize << 3; + uspi->s_bpfshift = uspi->s_fshift + 3; + uspi->s_bpfmask = uspi->s_bpf - 1; + if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == + UFS_MOUNT_UFSTYPE_44BSD) + uspi->s_maxsymlinklen = + fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen); + + sbi->s_flags = flags; + + inode = iget(sb, UFS_ROOTINO); + if (!inode || is_bad_inode(inode)) + goto failed; + sb->s_root = d_alloc_root(inode); + if (!sb->s_root) + goto dalloc_failed; + + + /* + * Read cylinder group structures + */ + if (!(sb->s_flags & MS_RDONLY)) + if (!ufs_read_cylinder_structures(sb)) + goto failed; + + UFSD(("EXIT\n")) + return 0; + +dalloc_failed: + iput(inode); +failed: + if (ubh) ubh_brelse_uspi (uspi); + if (uspi) kfree (uspi); + if (sbi) kfree(sbi); + sb->s_fs_info = NULL; + UFSD(("EXIT (FAILED)\n")) + return -EINVAL; + +failed_nomem: + UFSD(("EXIT (NOMEM)\n")) + return -ENOMEM; +} + +static void ufs_write_super (struct super_block *sb) { + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_super_block_third * usb3; + unsigned flags; + + lock_kernel(); + + UFSD(("ENTER\n")) + flags = UFS_SB(sb)->s_flags; + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + usb3 = ubh_get_usb_third(USPI_UBH); + + if (!(sb->s_flags & MS_RDONLY)) { + usb1->fs_time = cpu_to_fs32(sb, get_seconds()); + if ((flags & UFS_ST_MASK) == UFS_ST_SUN + || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) + ufs_set_fs_state(sb, usb1, usb3, + UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); + ubh_mark_buffer_dirty (USPI_UBH); + } + sb->s_dirt = 0; + UFSD(("EXIT\n")) + unlock_kernel(); +} + +static void ufs_put_super (struct super_block *sb) +{ + struct ufs_sb_info * sbi = UFS_SB(sb); + + UFSD(("ENTER\n")) + + if (!(sb->s_flags & MS_RDONLY)) + ufs_put_cylinder_structures (sb); + + ubh_brelse_uspi (sbi->s_uspi); + kfree (sbi->s_uspi); + kfree (sbi); + sb->s_fs_info = NULL; + return; +} + + +static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) +{ + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_super_block_third * usb3; + unsigned new_mount_opt, ufstype; + unsigned flags; + + uspi = UFS_SB(sb)->s_uspi; + flags = UFS_SB(sb)->s_flags; + usb1 = ubh_get_usb_first(USPI_UBH); + usb3 = ubh_get_usb_third(USPI_UBH); + + /* + * Allow the "check" option to be passed as a remount option. + * It is not possible to change ufstype option during remount + */ + ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; + new_mount_opt = 0; + ufs_set_opt (new_mount_opt, ONERROR_LOCK); + if (!ufs_parse_options (data, &new_mount_opt)) + return -EINVAL; + if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { + new_mount_opt |= ufstype; + } + else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { + printk("ufstype can't be changed during remount\n"); + return -EINVAL; + } + + if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { + UFS_SB(sb)->s_mount_opt = new_mount_opt; + return 0; + } + + /* + * fs was mouted as rw, remounting ro + */ + if (*mount_flags & MS_RDONLY) { + ufs_put_cylinder_structures(sb); + usb1->fs_time = cpu_to_fs32(sb, get_seconds()); + if ((flags & UFS_ST_MASK) == UFS_ST_SUN + || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) + ufs_set_fs_state(sb, usb1, usb3, + UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); + ubh_mark_buffer_dirty (USPI_UBH); + sb->s_dirt = 0; + sb->s_flags |= MS_RDONLY; + } + /* + * fs was mounted as ro, remounting rw + */ + else { +#ifndef CONFIG_UFS_FS_WRITE + printk("ufs was compiled with read-only support, " + "can't be mounted as read-write\n"); + return -EINVAL; +#else + if (ufstype != UFS_MOUNT_UFSTYPE_SUN && + ufstype != UFS_MOUNT_UFSTYPE_44BSD && + ufstype != UFS_MOUNT_UFSTYPE_SUNx86) { + printk("this ufstype is read-only supported\n"); + return -EINVAL; + } + if (!ufs_read_cylinder_structures (sb)) { + printk("failed during remounting\n"); + return -EPERM; + } + sb->s_flags &= ~MS_RDONLY; +#endif + } + UFS_SB(sb)->s_mount_opt = new_mount_opt; + return 0; +} + +static int ufs_statfs (struct super_block *sb, struct kstatfs *buf) +{ + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_super_block * usb; + unsigned flags = 0; + + lock_kernel(); + + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first (USPI_UBH); + usb = (struct ufs_super_block *) + ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ; + + flags = UFS_SB(sb)->s_flags; + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + buf->f_type = UFS2_MAGIC; + buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize); + buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) + + fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree); + buf->f_ffree = fs64_to_cpu(sb, + usb->fs_u11.fs_u2.fs_cstotal.cs_nifree); + } + else { + buf->f_type = UFS_MAGIC; + buf->f_blocks = uspi->s_dsize; + buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) + + fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); + buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); + } + buf->f_bsize = sb->s_blocksize; + buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) + ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; + buf->f_files = uspi->s_ncg * uspi->s_ipg; + buf->f_namelen = UFS_MAXNAMLEN; + + unlock_kernel(); + + return 0; +} + +static kmem_cache_t * ufs_inode_cachep; + +static struct inode *ufs_alloc_inode(struct super_block *sb) +{ + struct ufs_inode_info *ei; + ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL); + if (!ei) + return NULL; + ei->vfs_inode.i_version = 1; + return &ei->vfs_inode; +} + +static void ufs_destroy_inode(struct inode *inode) +{ + kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); +} + +static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) +{ + struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; + + if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == + SLAB_CTOR_CONSTRUCTOR) + inode_init_once(&ei->vfs_inode); +} + +static int init_inodecache(void) +{ + ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", + sizeof(struct ufs_inode_info), + 0, SLAB_RECLAIM_ACCOUNT, + init_once, NULL); + if (ufs_inode_cachep == NULL) + return -ENOMEM; + return 0; +} + +static void destroy_inodecache(void) +{ + if (kmem_cache_destroy(ufs_inode_cachep)) + printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n"); +} + +#ifdef CONFIG_QUOTA +static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); +static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); +#endif + +static struct super_operations ufs_super_ops = { + .alloc_inode = ufs_alloc_inode, + .destroy_inode = ufs_destroy_inode, + .read_inode = ufs_read_inode, + .write_inode = ufs_write_inode, + .delete_inode = ufs_delete_inode, + .put_super = ufs_put_super, + .write_super = ufs_write_super, + .statfs = ufs_statfs, + .remount_fs = ufs_remount, +#ifdef CONFIG_QUOTA + .quota_read = ufs_quota_read, + .quota_write = ufs_quota_write, +#endif +}; + +#ifdef CONFIG_QUOTA + +/* Read data from quotafile - avoid pagecache and such because we cannot afford + * acquiring the locks... As quota files are never truncated and quota code + * itself serializes the operations (and noone else should touch the files) + * we don't have to be afraid of races */ +static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, + size_t len, loff_t off) +{ + struct inode *inode = sb_dqopt(sb)->files[type]; + sector_t blk = off >> sb->s_blocksize_bits; + int err = 0; + int offset = off & (sb->s_blocksize - 1); + int tocopy; + size_t toread; + struct buffer_head *bh; + loff_t i_size = i_size_read(inode); + + if (off > i_size) + return 0; + if (off+len > i_size) + len = i_size-off; + toread = len; + while (toread > 0) { + tocopy = sb->s_blocksize - offset < toread ? + sb->s_blocksize - offset : toread; + + bh = ufs_bread(inode, blk, 0, &err); + if (err) + return err; + if (!bh) /* A hole? */ + memset(data, 0, tocopy); + else { + memcpy(data, bh->b_data+offset, tocopy); + brelse(bh); + } + offset = 0; + toread -= tocopy; + data += tocopy; + blk++; + } + return len; +} + +/* Write to quotafile */ +static ssize_t ufs_quota_write(struct super_block *sb, int type, + const char *data, size_t len, loff_t off) +{ + struct inode *inode = sb_dqopt(sb)->files[type]; + sector_t blk = off >> sb->s_blocksize_bits; + int err = 0; + int offset = off & (sb->s_blocksize - 1); + int tocopy; + size_t towrite = len; + struct buffer_head *bh; + + down(&inode->i_sem); + while (towrite > 0) { + tocopy = sb->s_blocksize - offset < towrite ? + sb->s_blocksize - offset : towrite; + + bh = ufs_bread(inode, blk, 1, &err); + if (!bh) + goto out; + lock_buffer(bh); + memcpy(bh->b_data+offset, data, tocopy); + flush_dcache_page(bh->b_page); + set_buffer_uptodate(bh); + mark_buffer_dirty(bh); + unlock_buffer(bh); + brelse(bh); + offset = 0; + towrite -= tocopy; + data += tocopy; + blk++; + } +out: + if (len == towrite) + return err; + if (inode->i_size < off+len-towrite) + i_size_write(inode, off+len-towrite); + inode->i_version++; + inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; + mark_inode_dirty(inode); + up(&inode->i_sem); + return len - towrite; +} + +#endif + +static struct super_block *ufs_get_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super); +} + +static struct file_system_type ufs_fs_type = { + .owner = THIS_MODULE, + .name = "ufs", + .get_sb = ufs_get_sb, + .kill_sb = kill_block_super, + .fs_flags = FS_REQUIRES_DEV, +}; + +static int __init init_ufs_fs(void) +{ + int err = init_inodecache(); + if (err) + goto out1; + err = register_filesystem(&ufs_fs_type); + if (err) + goto out; + return 0; +out: + destroy_inodecache(); +out1: + return err; +} + +static void __exit exit_ufs_fs(void) +{ + unregister_filesystem(&ufs_fs_type); + destroy_inodecache(); +} + +module_init(init_ufs_fs) +module_exit(exit_ufs_fs) +MODULE_LICENSE("GPL"); -- cgit v1.1