fs/ufs/super.c

   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <gwingerde@gmail.com>
  45  *
  46  * Clean swab support on 19970406 by
  47  * Francois-Rene Rideau <fare@tunes.org>
  48  *
  49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52  *
  53  * NeXTstep support added on February 5th 1998 by
  54  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55  *
  56  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57  *
  58  * HP/UX hfs filesystem support added by
  59  * Martin K. Petersen <mkp@mkp.net>, August 1999
  60  *
  61  * UFS2 (of FreeBSD 5.x) support added by
  62  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63  *
  64  * UFS2 write support added by
  65  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  66  */
  67
  68 #include <linux/exportfs.h>
  69 #include <linux/module.h>
  70 #include <linux/bitops.h>
  71
  72 #include <stdarg.h>
  73
  74 #include <asm/uaccess.h>
  75
  76 #include <linux/errno.h>
  77 #include <linux/fs.h>
  78 #include <linux/slab.h>
  79 #include <linux/time.h>
  80 #include <linux/stat.h>
  81 #include <linux/string.h>
  82 #include <linux/blkdev.h>
  83 #include <linux/init.h>
  84 #include <linux/parser.h>
  85 #include <linux/buffer_head.h>
  86 #include <linux/vfs.h>
  87 #include <linux/log2.h>
  88 #include <linux/mount.h>
  89 #include <linux/seq_file.h>
  90
  91 #include "ufs_fs.h"
  92 #include "ufs.h"
  93 #include "swab.h"
  94 #include "util.h"
  95
  96 void lock_ufs(struct super_block *sb)
  97 {
  98         struct ufs_sb_info *sbi = UFS_SB(sb);
  99
 100         mutex_lock(&sbi->mutex);
 101         sbi->mutex_owner = current;
 102 }
 103
 104 void unlock_ufs(struct super_block *sb)
 105 {
 106         struct ufs_sb_info *sbi = UFS_SB(sb);
 107
 108         sbi->mutex_owner = NULL;
 109         mutex_unlock(&sbi->mutex);
 110 }
 111
 112 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 113 {
 114         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 115         struct inode *inode;
 116
 117         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 118                 return ERR_PTR(-ESTALE);
 119
 120         inode = ufs_iget(sb, ino);
 121         if (IS_ERR(inode))
 122                 return ERR_CAST(inode);
 123         if (generation && inode->i_generation != generation) {
 124                 iput(inode);
 125                 return ERR_PTR(-ESTALE);
 126         }
 127         return inode;
 128 }
 129
 130 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 131                                        int fh_len, int fh_type)
 132 {
 133         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 134 }
 135
 136 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 137                                        int fh_len, int fh_type)
 138 {
 139         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 140 }
 141
 142 static struct dentry *ufs_get_parent(struct dentry *child)
 143 {
 144         struct qstr dot_dot = QSTR_INIT("..", 2);
 145         ino_t ino;
 146
 147         ino = ufs_inode_by_name(child->d_inode, &dot_dot);
 148         if (!ino)
 149                 return ERR_PTR(-ENOENT);
 150         return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
 151 }
 152
 153 static const struct export_operations ufs_export_ops = {
 154         .fh_to_dentry   = ufs_fh_to_dentry,
 155         .fh_to_parent   = ufs_fh_to_parent,
 156         .get_parent     = ufs_get_parent,
 157 };
 158
 159 #ifdef CONFIG_UFS_DEBUG
 160 /*
 161  * Print contents of ufs_super_block, useful for debugging
 162  */
 163 static void ufs_print_super_stuff(struct super_block *sb,
 164                                   struct ufs_super_block_first *usb1,
 165                                   struct ufs_super_block_second *usb2,
 166                                   struct ufs_super_block_third *usb3)
 167 {
 168         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 169
 170         pr_debug("ufs_print_super_stuff\n");
 171         pr_debug("  magic:     0x%x\n", magic);
 172         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 173                 pr_debug("  fs_size:   %llu\n", (unsigned long long)
 174                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 175                 pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
 176                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 177                 pr_debug("  bsize:         %u\n",
 178                          fs32_to_cpu(sb, usb1->fs_bsize));
 179                 pr_debug("  fsize:         %u\n",
 180                          fs32_to_cpu(sb, usb1->fs_fsize));
 181                 pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 182                 pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
 183                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 184                 pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 185                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 186                 pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
 187                          (unsigned long long)
 188                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 189                 pr_info("  cs_nifree(Num of free inodes): %llu\n",
 190                         (unsigned long long)
 191                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 192                 pr_info("  cs_nffree(Num of free frags): %llu\n",
 193                         (unsigned long long)
 194                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 195                 pr_info("  fs_maxsymlinklen: %u\n",
 196                         fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 197         } else {
 198                 pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 199                 pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 200                 pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 201                 pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 202                 pr_debug(" cgoffset:    %u\n",
 203                          fs32_to_cpu(sb, usb1->fs_cgoffset));
 204                 pr_debug(" ~cgmask:     0x%x\n",
 205                          ~fs32_to_cpu(sb, usb1->fs_cgmask));
 206                 pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 207                 pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 208                 pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 209                 pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 210                 pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 211                 pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 212                 pr_debug(" fragshift:   %u\n",
 213                          fs32_to_cpu(sb, usb1->fs_fragshift));
 214                 pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 215                 pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 216                 pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 217                 pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 218                 pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 219                 pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 220                 pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 221                 pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 222                 pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 223                 pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 224                 pr_debug(" fstodb:      %u\n",
 225                          fs32_to_cpu(sb, usb1->fs_fsbtodb));
 226                 pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 227                 pr_debug(" ndir         %u\n",
 228                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 229                 pr_debug(" nifree       %u\n",
 230                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 231                 pr_debug(" nbfree       %u\n",
 232                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 233                 pr_debug(" nffree       %u\n",
 234                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 235         }
 236         pr_debug("\n");
 237 }
 238
 239 /*
 240  * Print contents of ufs_cylinder_group, useful for debugging
 241  */
 242 static void ufs_print_cylinder_stuff(struct super_block *sb,
 243                                      struct ufs_cylinder_group *cg)
 244 {
 245         pr_debug("\nufs_print_cylinder_stuff\n");
 246         pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 247         pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 248         pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 249         pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 250         pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 251         pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 252         pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 253         pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 254         pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 255         pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 256         pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 257         pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 258         pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 259         pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 260         pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 261             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 262             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 263             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 264             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 265         pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 266         pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 267         pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 268         pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 269         pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 270         pr_debug("  clustersumoff %u\n",
 271                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 272         pr_debug("  clusteroff    %u\n",
 273                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 274         pr_debug("  nclusterblks  %u\n",
 275                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 276         pr_debug("\n");
 277 }
 278 #else
 279 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 280 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 281 #endif /* CONFIG_UFS_DEBUG */
 282
 283 static const struct super_operations ufs_super_ops;
 284
 285 void ufs_error (struct super_block * sb, const char * function,
 286         const char * fmt, ...)
 287 {
 288         struct ufs_sb_private_info * uspi;
 289         struct ufs_super_block_first * usb1;
 290         struct va_format vaf;
 291         va_list args;
 292
 293         uspi = UFS_SB(sb)->s_uspi;
 294         usb1 = ubh_get_usb_first(uspi);
 295
 296         if (!(sb->s_flags & MS_RDONLY)) {
 297                 usb1->fs_clean = UFS_FSBAD;
 298                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 299                 ufs_mark_sb_dirty(sb);
 300                 sb->s_flags |= MS_RDONLY;
 301         }
 302         va_start(args, fmt);
 303         vaf.fmt = fmt;
 304         vaf.va = &args;
 305         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 306         case UFS_MOUNT_ONERROR_PANIC:
 307                 panic("panic (device %s): %s: %pV\n",
 308                       sb->s_id, function, &vaf);
 309
 310         case UFS_MOUNT_ONERROR_LOCK:
 311         case UFS_MOUNT_ONERROR_UMOUNT:
 312         case UFS_MOUNT_ONERROR_REPAIR:
 313                 pr_crit("error (device %s): %s: %pV\n",
 314                         sb->s_id, function, &vaf);
 315         }
 316         va_end(args);
 317 }
 318
 319 void ufs_panic (struct super_block * sb, const char * function,
 320         const char * fmt, ...)
 321 {
 322         struct ufs_sb_private_info * uspi;
 323         struct ufs_super_block_first * usb1;
 324         struct va_format vaf;
 325         va_list args;
 326
 327         uspi = UFS_SB(sb)->s_uspi;
 328         usb1 = ubh_get_usb_first(uspi);
 329
 330         if (!(sb->s_flags & MS_RDONLY)) {
 331                 usb1->fs_clean = UFS_FSBAD;
 332                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 333                 ufs_mark_sb_dirty(sb);
 334         }
 335         va_start(args, fmt);
 336         vaf.fmt = fmt;
 337         vaf.va = &args;
 338         sb->s_flags |= MS_RDONLY;
 339         pr_crit("panic (device %s): %s: %pV\n",
 340                 sb->s_id, function, &vaf);
 341         va_end(args);
 342 }
 343
 344 void ufs_warning (struct super_block * sb, const char * function,
 345         const char * fmt, ...)
 346 {
 347         struct va_format vaf;
 348         va_list args;
 349
 350         va_start(args, fmt);
 351         vaf.fmt = fmt;
 352         vaf.va = &args;
 353         pr_warn("(device %s): %s: %pV\n",
 354                 sb->s_id, function, &vaf);
 355         va_end(args);
 356 }
 357
 358 enum {
 359        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 360        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 361        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 362        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 363        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 364        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 365        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 366        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 367        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 368        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 369        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 370        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 371        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 372        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 373        Opt_err
 374 };
 375
 376 static const match_table_t tokens = {
 377         {Opt_type_old, "ufstype=old"},
 378         {Opt_type_sunx86, "ufstype=sunx86"},
 379         {Opt_type_sun, "ufstype=sun"},
 380         {Opt_type_sunos, "ufstype=sunos"},
 381         {Opt_type_44bsd, "ufstype=44bsd"},
 382         {Opt_type_ufs2, "ufstype=ufs2"},
 383         {Opt_type_ufs2, "ufstype=5xbsd"},
 384         {Opt_type_hp, "ufstype=hp"},
 385         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 386         {Opt_type_nextstep, "ufstype=nextstep"},
 387         {Opt_type_openstep, "ufstype=openstep"},
 388 /*end of possible ufs types */
 389         {Opt_onerror_panic, "onerror=panic"},
 390         {Opt_onerror_lock, "onerror=lock"},
 391         {Opt_onerror_umount, "onerror=umount"},
 392         {Opt_onerror_repair, "onerror=repair"},
 393         {Opt_err, NULL}
 394 };
 395
 396 static int ufs_parse_options (char * options, unsigned * mount_options)
 397 {
 398         char * p;
 399
 400         UFSD("ENTER\n");
 401
 402         if (!options)
 403                 return 1;
 404
 405         while ((p = strsep(&options, ",")) != NULL) {
 406                 substring_t args[MAX_OPT_ARGS];
 407                 int token;
 408                 if (!*p)
 409                         continue;
 410
 411                 token = match_token(p, tokens, args);
 412                 switch (token) {
 413                 case Opt_type_old:
 414                         ufs_clear_opt (*mount_options, UFSTYPE);
 415                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 416                         break;
 417                 case Opt_type_sunx86:
 418                         ufs_clear_opt (*mount_options, UFSTYPE);
 419                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 420                         break;
 421                 case Opt_type_sun:
 422                         ufs_clear_opt (*mount_options, UFSTYPE);
 423                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 424                         break;
 425                 case Opt_type_sunos:
 426                         ufs_clear_opt(*mount_options, UFSTYPE);
 427                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 428                         break;
 429                 case Opt_type_44bsd:
 430                         ufs_clear_opt (*mount_options, UFSTYPE);
 431                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 432                         break;
 433                 case Opt_type_ufs2:
 434                         ufs_clear_opt(*mount_options, UFSTYPE);
 435                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 436                         break;
 437                 case Opt_type_hp:
 438                         ufs_clear_opt (*mount_options, UFSTYPE);
 439                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 440                         break;
 441                 case Opt_type_nextstepcd:
 442                         ufs_clear_opt (*mount_options, UFSTYPE);
 443                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 444                         break;
 445                 case Opt_type_nextstep:
 446                         ufs_clear_opt (*mount_options, UFSTYPE);
 447                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 448                         break;
 449                 case Opt_type_openstep:
 450                         ufs_clear_opt (*mount_options, UFSTYPE);
 451                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 452                         break;
 453                 case Opt_onerror_panic:
 454                         ufs_clear_opt (*mount_options, ONERROR);
 455                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 456                         break;
 457                 case Opt_onerror_lock:
 458                         ufs_clear_opt (*mount_options, ONERROR);
 459                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 460                         break;
 461                 case Opt_onerror_umount:
 462                         ufs_clear_opt (*mount_options, ONERROR);
 463                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 464                         break;
 465                 case Opt_onerror_repair:
 466                         pr_err("Unable to do repair on error, will lock lock instead\n");
 467                         ufs_clear_opt (*mount_options, ONERROR);
 468                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 469                         break;
 470                 default:
 471                         pr_err("Invalid option: \"%s\" or missing value\n", p);
 472                         return 0;
 473                 }
 474         }
 475         return 1;
 476 }
 477
 478 /*
 479  * Different types of UFS hold fs_cstotal in different
 480  * places, and use different data structure for it.
 481  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
 482  */
 483 static void ufs_setup_cstotal(struct super_block *sb)
 484 {
 485         struct ufs_sb_info *sbi = UFS_SB(sb);
 486         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 487         struct ufs_super_block_first *usb1;
 488         struct ufs_super_block_second *usb2;
 489         struct ufs_super_block_third *usb3;
 490         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 491
 492         UFSD("ENTER, mtype=%u\n", mtype);
 493         usb1 = ubh_get_usb_first(uspi);
 494         usb2 = ubh_get_usb_second(uspi);
 495         usb3 = ubh_get_usb_third(uspi);
 496
 497         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 498              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 499             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 500                 /*we have statistic in different place, then usual*/
 501                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 502                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 503                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 504                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 505         } else {
 506                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 507                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 508                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 509                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 510         }
 511         UFSD("EXIT\n");
 512 }
 513
 514 /*
 515  * Read on-disk structures associated with cylinder groups
 516  */
 517 static int ufs_read_cylinder_structures(struct super_block *sb)
 518 {
 519         struct ufs_sb_info *sbi = UFS_SB(sb);
 520         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 521         struct ufs_buffer_head * ubh;
 522         unsigned char * base, * space;
 523         unsigned size, blks, i;
 524
 525         UFSD("ENTER\n");
 526
 527         /*
 528          * Read cs structures from (usually) first data block
 529          * on the device.
 530          */
 531         size = uspi->s_cssize;
 532         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 533         base = space = kmalloc(size, GFP_NOFS);
 534         if (!base)
 535                 goto failed;
 536         sbi->s_csp = (struct ufs_csum *)space;
 537         for (i = 0; i < blks; i += uspi->s_fpb) {
 538                 size = uspi->s_bsize;
 539                 if (i + uspi->s_fpb > blks)
 540                         size = (blks - i) * uspi->s_fsize;
 541
 542                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 543
 544                 if (!ubh)
 545                         goto failed;
 546
 547                 ubh_ubhcpymem (space, ubh, size);
 548
 549                 space += size;
 550                 ubh_brelse (ubh);
 551                 ubh = NULL;
 552         }
 553
 554         /*
 555          * Read cylinder group (we read only first fragment from block
 556          * at this time) and prepare internal data structures for cg caching.
 557          */
 558         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
 559                 goto failed;
 560         for (i = 0; i < uspi->s_ncg; i++)
 561                 sbi->s_ucg[i] = NULL;
 562         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 563                 sbi->s_ucpi[i] = NULL;
 564                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 565         }
 566         for (i = 0; i < uspi->s_ncg; i++) {
 567                 UFSD("read cg %u\n", i);
 568                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 569                         goto failed;
 570                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 571                         goto failed;
 572
 573                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 574         }
 575         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 576                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
 577                         goto failed;
 578                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 579         }
 580         sbi->s_cg_loaded = 0;
 581         UFSD("EXIT\n");
 582         return 1;
 583
 584 failed:
 585         kfree (base);
 586         if (sbi->s_ucg) {
 587                 for (i = 0; i < uspi->s_ncg; i++)
 588                         if (sbi->s_ucg[i])
 589                                 brelse (sbi->s_ucg[i]);
 590                 kfree (sbi->s_ucg);
 591                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 592                         kfree (sbi->s_ucpi[i]);
 593         }
 594         UFSD("EXIT (FAILED)\n");
 595         return 0;
 596 }
 597
 598 /*
 599  * Sync our internal copy of fs_cstotal with disk
 600  */
 601 static void ufs_put_cstotal(struct super_block *sb)
 602 {
 603         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 604         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 605         struct ufs_super_block_first *usb1;
 606         struct ufs_super_block_second *usb2;
 607         struct ufs_super_block_third *usb3;
 608
 609         UFSD("ENTER\n");
 610         usb1 = ubh_get_usb_first(uspi);
 611         usb2 = ubh_get_usb_second(uspi);
 612         usb3 = ubh_get_usb_third(uspi);
 613
 614         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 615              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 616             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 617                 /*we have statistic in different place, then usual*/
 618                 usb2->fs_un.fs_u2.cs_ndir =
 619                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 620                 usb2->fs_un.fs_u2.cs_nbfree =
 621                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 622                 usb3->fs_un1.fs_u2.cs_nifree =
 623                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 624                 usb3->fs_un1.fs_u2.cs_nffree =
 625                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 626         } else {
 627                 usb1->fs_cstotal.cs_ndir =
 628                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 629                 usb1->fs_cstotal.cs_nbfree =
 630                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 631                 usb1->fs_cstotal.cs_nifree =
 632                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 633                 usb1->fs_cstotal.cs_nffree =
 634                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 635         }
 636         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 637         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 638         UFSD("EXIT\n");
 639 }
 640
 641 /**
 642  * ufs_put_super_internal() - put on-disk intrenal structures
 643  * @sb: pointer to super_block structure
 644  * Put on-disk structures associated with cylinder groups
 645  * and write them back to disk, also update cs_total on disk
 646  */
 647 static void ufs_put_super_internal(struct super_block *sb)
 648 {
 649         struct ufs_sb_info *sbi = UFS_SB(sb);
 650         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 651         struct ufs_buffer_head * ubh;
 652         unsigned char * base, * space;
 653         unsigned blks, size, i;
 654
 655
 656         UFSD("ENTER\n");
 657
 658         ufs_put_cstotal(sb);
 659         size = uspi->s_cssize;
 660         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 661         base = space = (char*) sbi->s_csp;
 662         for (i = 0; i < blks; i += uspi->s_fpb) {
 663                 size = uspi->s_bsize;
 664                 if (i + uspi->s_fpb > blks)
 665                         size = (blks - i) * uspi->s_fsize;
 666
 667                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 668
 669                 ubh_memcpyubh (ubh, space, size);
 670                 space += size;
 671                 ubh_mark_buffer_uptodate (ubh, 1);
 672                 ubh_mark_buffer_dirty (ubh);
 673                 ubh_brelse (ubh);
 674         }
 675         for (i = 0; i < sbi->s_cg_loaded; i++) {
 676                 ufs_put_cylinder (sb, i);
 677                 kfree (sbi->s_ucpi[i]);
 678         }
 679         for (; i < UFS_MAX_GROUP_LOADED; i++)
 680                 kfree (sbi->s_ucpi[i]);
 681         for (i = 0; i < uspi->s_ncg; i++)
 682                 brelse (sbi->s_ucg[i]);
 683         kfree (sbi->s_ucg);
 684         kfree (base);
 685
 686         UFSD("EXIT\n");
 687 }
 688
 689 static int ufs_sync_fs(struct super_block *sb, int wait)
 690 {
 691         struct ufs_sb_private_info * uspi;
 692         struct ufs_super_block_first * usb1;
 693         struct ufs_super_block_third * usb3;
 694         unsigned flags;
 695
 696         lock_ufs(sb);
 697
 698         UFSD("ENTER\n");
 699
 700         flags = UFS_SB(sb)->s_flags;
 701         uspi = UFS_SB(sb)->s_uspi;
 702         usb1 = ubh_get_usb_first(uspi);
 703         usb3 = ubh_get_usb_third(uspi);
 704
 705         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
 706         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
 707             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 708             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 709                 ufs_set_fs_state(sb, usb1, usb3,
 710                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 711         ufs_put_cstotal(sb);
 712
 713         UFSD("EXIT\n");
 714         unlock_ufs(sb);
 715
 716         return 0;
 717 }
 718
 719 static void delayed_sync_fs(struct work_struct *work)
 720 {
 721         struct ufs_sb_info *sbi;
 722
 723         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
 724
 725         spin_lock(&sbi->work_lock);
 726         sbi->work_queued = 0;
 727         spin_unlock(&sbi->work_lock);
 728
 729         ufs_sync_fs(sbi->sb, 1);
 730 }
 731
 732 void ufs_mark_sb_dirty(struct super_block *sb)
 733 {
 734         struct ufs_sb_info *sbi = UFS_SB(sb);
 735         unsigned long delay;
 736
 737         spin_lock(&sbi->work_lock);
 738         if (!sbi->work_queued) {
 739                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
 740                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
 741                 sbi->work_queued = 1;
 742         }
 743         spin_unlock(&sbi->work_lock);
 744 }
 745
 746 static void ufs_put_super(struct super_block *sb)
 747 {
 748         struct ufs_sb_info * sbi = UFS_SB(sb);
 749
 750         UFSD("ENTER\n");
 751
 752         if (!(sb->s_flags & MS_RDONLY))
 753                 ufs_put_super_internal(sb);
 754         cancel_delayed_work_sync(&sbi->sync_work);
 755
 756         ubh_brelse_uspi (sbi->s_uspi);
 757         kfree (sbi->s_uspi);
 758         mutex_destroy(&sbi->mutex);
 759         kfree (sbi);
 760         sb->s_fs_info = NULL;
 761         UFSD("EXIT\n");
 762         return;
 763 }
 764
 765 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 766 {
 767         struct ufs_sb_info * sbi;
 768         struct ufs_sb_private_info * uspi;
 769         struct ufs_super_block_first * usb1;
 770         struct ufs_super_block_second * usb2;
 771         struct ufs_super_block_third * usb3;
 772         struct ufs_buffer_head * ubh;
 773         struct inode *inode;
 774         unsigned block_size, super_block_size;
 775         unsigned flags;
 776         unsigned super_block_offset;
 777         unsigned maxsymlen;
 778         int ret = -EINVAL;
 779
 780         uspi = NULL;
 781         ubh = NULL;
 782         flags = 0;
 783
 784         UFSD("ENTER\n");
 785
 786 #ifndef CONFIG_UFS_FS_WRITE
 787         if (!(sb->s_flags & MS_RDONLY)) {
 788                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 789                 return -EROFS;
 790         }
 791 #endif
 792
 793         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 794         if (!sbi)
 795                 goto failed_nomem;
 796         sb->s_fs_info = sbi;
 797         sbi->sb = sb;
 798
 799         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 800
 801         mutex_init(&sbi->mutex);
 802         spin_lock_init(&sbi->work_lock);
 803         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
 804         /*
 805          * Set default mount options
 806          * Parse mount options
 807          */
 808         sbi->s_mount_opt = 0;
 809         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 810         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 811                 pr_err("wrong mount options\n");
 812                 goto failed;
 813         }
 814         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 815                 if (!silent)
 816                         pr_err("You didn't specify the type of your ufs filesystem\n\n"
 817                         "mount -t ufs -o ufstype="
 818                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 819                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 820                         "default is ufstype=old\n");
 821                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 822         }
 823
 824         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 825         sbi->s_uspi = uspi;
 826         if (!uspi)
 827                 goto failed;
 828         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 829         super_block_offset=UFS_SBLOCK;
 830
 831         /* Keep 2Gig file limit. Some UFS variants need to override
 832            this but as I don't know which I'll let those in the know loosen
 833            the rules */
 834         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 835         case UFS_MOUNT_UFSTYPE_44BSD:
 836                 UFSD("ufstype=44bsd\n");
 837                 uspi->s_fsize = block_size = 512;
 838                 uspi->s_fmask = ~(512 - 1);
 839                 uspi->s_fshift = 9;
 840                 uspi->s_sbsize = super_block_size = 1536;
 841                 uspi->s_sbbase = 0;
 842                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 843                 break;
 844         case UFS_MOUNT_UFSTYPE_UFS2:
 845                 UFSD("ufstype=ufs2\n");
 846                 super_block_offset=SBLOCK_UFS2;
 847                 uspi->s_fsize = block_size = 512;
 848                 uspi->s_fmask = ~(512 - 1);
 849                 uspi->s_fshift = 9;
 850                 uspi->s_sbsize = super_block_size = 1536;
 851                 uspi->s_sbbase =  0;
 852                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 853                 break;
 854
 855         case UFS_MOUNT_UFSTYPE_SUN:
 856                 UFSD("ufstype=sun\n");
 857                 uspi->s_fsize = block_size = 1024;
 858                 uspi->s_fmask = ~(1024 - 1);
 859                 uspi->s_fshift = 10;
 860                 uspi->s_sbsize = super_block_size = 2048;
 861                 uspi->s_sbbase = 0;
 862                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 863                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 864                 break;
 865
 866         case UFS_MOUNT_UFSTYPE_SUNOS:
 867                 UFSD("ufstype=sunos\n");
 868                 uspi->s_fsize = block_size = 1024;
 869                 uspi->s_fmask = ~(1024 - 1);
 870                 uspi->s_fshift = 10;
 871                 uspi->s_sbsize = 2048;
 872                 super_block_size = 2048;
 873                 uspi->s_sbbase = 0;
 874                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 875                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 876                 break;
 877
 878         case UFS_MOUNT_UFSTYPE_SUNx86:
 879                 UFSD("ufstype=sunx86\n");
 880                 uspi->s_fsize = block_size = 1024;
 881                 uspi->s_fmask = ~(1024 - 1);
 882                 uspi->s_fshift = 10;
 883                 uspi->s_sbsize = super_block_size = 2048;
 884                 uspi->s_sbbase = 0;
 885                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 886                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 887                 break;
 888
 889         case UFS_MOUNT_UFSTYPE_OLD:
 890                 UFSD("ufstype=old\n");
 891                 uspi->s_fsize = block_size = 1024;
 892                 uspi->s_fmask = ~(1024 - 1);
 893                 uspi->s_fshift = 10;
 894                 uspi->s_sbsize = super_block_size = 2048;
 895                 uspi->s_sbbase = 0;
 896                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 897                 if (!(sb->s_flags & MS_RDONLY)) {
 898                         if (!silent)
 899                                 pr_info("ufstype=old is supported read-only\n");
 900                         sb->s_flags |= MS_RDONLY;
 901                 }
 902                 break;
 903
 904         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 905                 UFSD("ufstype=nextstep\n");
 906                 uspi->s_fsize = block_size = 1024;
 907                 uspi->s_fmask = ~(1024 - 1);
 908                 uspi->s_fshift = 10;
 909                 uspi->s_sbsize = super_block_size = 2048;
 910                 uspi->s_sbbase = 0;
 911                 uspi->s_dirblksize = 1024;
 912                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 913                 if (!(sb->s_flags & MS_RDONLY)) {
 914                         if (!silent)
 915                                 pr_info("ufstype=nextstep is supported read-only\n");
 916                         sb->s_flags |= MS_RDONLY;
 917                 }
 918                 break;
 919
 920         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 921                 UFSD("ufstype=nextstep-cd\n");
 922                 uspi->s_fsize = block_size = 2048;
 923                 uspi->s_fmask = ~(2048 - 1);
 924                 uspi->s_fshift = 11;
 925                 uspi->s_sbsize = super_block_size = 2048;
 926                 uspi->s_sbbase = 0;
 927                 uspi->s_dirblksize = 1024;
 928                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 929                 if (!(sb->s_flags & MS_RDONLY)) {
 930                         if (!silent)
 931                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
 932                         sb->s_flags |= MS_RDONLY;
 933                 }
 934                 break;
 935
 936         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 937                 UFSD("ufstype=openstep\n");
 938                 uspi->s_fsize = block_size = 1024;
 939                 uspi->s_fmask = ~(1024 - 1);
 940                 uspi->s_fshift = 10;
 941                 uspi->s_sbsize = super_block_size = 2048;
 942                 uspi->s_sbbase = 0;
 943                 uspi->s_dirblksize = 1024;
 944                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 945                 if (!(sb->s_flags & MS_RDONLY)) {
 946                         if (!silent)
 947                                 pr_info("ufstype=openstep is supported read-only\n");
 948                         sb->s_flags |= MS_RDONLY;
 949                 }
 950                 break;
 951
 952         case UFS_MOUNT_UFSTYPE_HP:
 953                 UFSD("ufstype=hp\n");
 954                 uspi->s_fsize = block_size = 1024;
 955                 uspi->s_fmask = ~(1024 - 1);
 956                 uspi->s_fshift = 10;
 957                 uspi->s_sbsize = super_block_size = 2048;
 958                 uspi->s_sbbase = 0;
 959                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 960                 if (!(sb->s_flags & MS_RDONLY)) {
 961                         if (!silent)
 962                                 pr_info("ufstype=hp is supported read-only\n");
 963                         sb->s_flags |= MS_RDONLY;
 964                 }
 965                 break;
 966         default:
 967                 if (!silent)
 968                         pr_err("unknown ufstype\n");
 969                 goto failed;
 970         }
 971
 972 again:
 973         if (!sb_set_blocksize(sb, block_size)) {
 974                 pr_err("failed to set blocksize\n");
 975                 goto failed;
 976         }
 977
 978         /*
 979          * read ufs super block from device
 980          */
 981
 982         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 983
 984         if (!ubh)
 985             goto failed;
 986
 987         usb1 = ubh_get_usb_first(uspi);
 988         usb2 = ubh_get_usb_second(uspi);
 989         usb3 = ubh_get_usb_third(uspi);
 990
 991         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 992         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 993         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 994             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 995                 flags &= ~UFS_ST_MASK;
 996                 flags |=  UFS_ST_SUN;
 997         }
 998
 999         /*
1000          * Check ufs magic number
1001          */
1002         sbi->s_bytesex = BYTESEX_LE;
1003         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1004                 case UFS_MAGIC:
1005                 case UFS_MAGIC_BW:
1006                 case UFS2_MAGIC:
1007                 case UFS_MAGIC_LFN:
1008                 case UFS_MAGIC_FEA:
1009                 case UFS_MAGIC_4GB:
1010                         goto magic_found;
1011         }
1012         sbi->s_bytesex = BYTESEX_BE;
1013         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1014                 case UFS_MAGIC:
1015                 case UFS_MAGIC_BW:
1016                 case UFS2_MAGIC:
1017                 case UFS_MAGIC_LFN:
1018                 case UFS_MAGIC_FEA:
1019                 case UFS_MAGIC_4GB:
1020                         goto magic_found;
1021         }
1022
1023         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1024           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1025           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1026           && uspi->s_sbbase < 256) {
1027                 ubh_brelse_uspi(uspi);
1028                 ubh = NULL;
1029                 uspi->s_sbbase += 8;
1030                 goto again;
1031         }
1032         if (!silent)
1033                 pr_err("%s(): bad magic number\n", __func__);
1034         goto failed;
1035
1036 magic_found:
1037         /*
1038          * Check block and fragment sizes
1039          */
1040         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1041         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1042         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1043         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1044         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1045
1046         if (!is_power_of_2(uspi->s_fsize)) {
1047                 pr_err("%s(): fragment size %u is not a power of 2\n",
1048                        __func__, uspi->s_fsize);
1049                 goto failed;
1050         }
1051         if (uspi->s_fsize < 512) {
1052                 pr_err("%s(): fragment size %u is too small\n",
1053                        __func__, uspi->s_fsize);
1054                 goto failed;
1055         }
1056         if (uspi->s_fsize > 4096) {
1057                 pr_err("%s(): fragment size %u is too large\n",
1058                        __func__, uspi->s_fsize);
1059                 goto failed;
1060         }
1061         if (!is_power_of_2(uspi->s_bsize)) {
1062                 pr_err("%s(): block size %u is not a power of 2\n",
1063                        __func__, uspi->s_bsize);
1064                 goto failed;
1065         }
1066         if (uspi->s_bsize < 4096) {
1067                 pr_err("%s(): block size %u is too small\n",
1068                        __func__, uspi->s_bsize);
1069                 goto failed;
1070         }
1071         if (uspi->s_bsize / uspi->s_fsize > 8) {
1072                 pr_err("%s(): too many fragments per block (%u)\n",
1073                        __func__, uspi->s_bsize / uspi->s_fsize);
1074                 goto failed;
1075         }
1076         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1077                 ubh_brelse_uspi(uspi);
1078                 ubh = NULL;
1079                 block_size = uspi->s_fsize;
1080                 super_block_size = uspi->s_sbsize;
1081                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1082                 goto again;
1083         }
1084
1085         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1086         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1087
1088         /*
1089          * Check, if file system was correctly unmounted.
1090          * If not, make it read only.
1091          */
1092         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1093           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1094           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1095             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1096           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1097           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1098                 switch(usb1->fs_clean) {
1099                 case UFS_FSCLEAN:
1100                         UFSD("fs is clean\n");
1101                         break;
1102                 case UFS_FSSTABLE:
1103                         UFSD("fs is stable\n");
1104                         break;
1105                 case UFS_FSLOG:
1106                         UFSD("fs is logging fs\n");
1107                         break;
1108                 case UFS_FSOSF1:
1109                         UFSD("fs is DEC OSF/1\n");
1110                         break;
1111                 case UFS_FSACTIVE:
1112                         pr_err("%s(): fs is active\n", __func__);
1113                         sb->s_flags |= MS_RDONLY;
1114                         break;
1115                 case UFS_FSBAD:
1116                         pr_err("%s(): fs is bad\n", __func__);
1117                         sb->s_flags |= MS_RDONLY;
1118                         break;
1119                 default:
1120                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1121                                __func__, usb1->fs_clean);
1122                         sb->s_flags |= MS_RDONLY;
1123                         break;
1124                 }
1125         } else {
1126                 pr_err("%s(): fs needs fsck\n", __func__);
1127                 sb->s_flags |= MS_RDONLY;
1128         }
1129
1130         /*
1131          * Read ufs_super_block into internal data structures
1132          */
1133         sb->s_op = &ufs_super_ops;
1134         sb->s_export_op = &ufs_export_ops;
1135
1136         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1137
1138         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1139         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1140         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1141         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1142         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1143         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1144
1145         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1146                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1147                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1148         } else {
1149                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1150                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1151         }
1152
1153         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1154         /* s_bsize already set */
1155         /* s_fsize already set */
1156         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1157         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1158         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1159         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1160         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1161         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1162         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1163                 uspi->s_fshift);
1164         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1165         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1166         /* s_sbsize already set */
1167         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1168         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1169         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1170         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1171         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1172         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1173         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1174         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1175
1176         if (uspi->fs_magic == UFS2_MAGIC)
1177                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1178         else
1179                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1180
1181         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1182         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1183         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1184         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1185         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1186         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1187         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1188         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1189         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1190         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1191         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1192         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1193         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1194         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1195
1196         /*
1197          * Compute another frequently used values
1198          */
1199         uspi->s_fpbmask = uspi->s_fpb - 1;
1200         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1201                 uspi->s_apbshift = uspi->s_bshift - 3;
1202         else
1203                 uspi->s_apbshift = uspi->s_bshift - 2;
1204
1205         uspi->s_2apbshift = uspi->s_apbshift * 2;
1206         uspi->s_3apbshift = uspi->s_apbshift * 3;
1207         uspi->s_apb = 1 << uspi->s_apbshift;
1208         uspi->s_2apb = 1 << uspi->s_2apbshift;
1209         uspi->s_3apb = 1 << uspi->s_3apbshift;
1210         uspi->s_apbmask = uspi->s_apb - 1;
1211         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1212         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1213         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1214         uspi->s_bpf = uspi->s_fsize << 3;
1215         uspi->s_bpfshift = uspi->s_fshift + 3;
1216         uspi->s_bpfmask = uspi->s_bpf - 1;
1217         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1218             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1219                 uspi->s_maxsymlinklen =
1220                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1221
1222         if (uspi->fs_magic == UFS2_MAGIC)
1223                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1224         else
1225                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1226         if (uspi->s_maxsymlinklen > maxsymlen) {
1227                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1228                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1229                 uspi->s_maxsymlinklen = maxsymlen;
1230         }
1231         sb->s_max_links = UFS_LINK_MAX;
1232
1233         inode = ufs_iget(sb, UFS_ROOTINO);
1234         if (IS_ERR(inode)) {
1235                 ret = PTR_ERR(inode);
1236                 goto failed;
1237         }
1238         sb->s_root = d_make_root(inode);
1239         if (!sb->s_root) {
1240                 ret = -ENOMEM;
1241                 goto failed;
1242         }
1243
1244         ufs_setup_cstotal(sb);
1245         /*
1246          * Read cylinder group structures
1247          */
1248         if (!(sb->s_flags & MS_RDONLY))
1249                 if (!ufs_read_cylinder_structures(sb))
1250                         goto failed;
1251
1252         UFSD("EXIT\n");
1253         return 0;
1254
1255 failed:
1256         mutex_destroy(&sbi->mutex);
1257         if (ubh)
1258                 ubh_brelse_uspi (uspi);
1259         kfree (uspi);
1260         kfree(sbi);
1261         sb->s_fs_info = NULL;
1262         UFSD("EXIT (FAILED)\n");
1263         return ret;
1264
1265 failed_nomem:
1266         UFSD("EXIT (NOMEM)\n");
1267         return -ENOMEM;
1268 }
1269
1270 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1271 {
1272         struct ufs_sb_private_info * uspi;
1273         struct ufs_super_block_first * usb1;
1274         struct ufs_super_block_third * usb3;
1275         unsigned new_mount_opt, ufstype;
1276         unsigned flags;
1277
1278         sync_filesystem(sb);
1279         lock_ufs(sb);
1280         uspi = UFS_SB(sb)->s_uspi;
1281         flags = UFS_SB(sb)->s_flags;
1282         usb1 = ubh_get_usb_first(uspi);
1283         usb3 = ubh_get_usb_third(uspi);
1284
1285         /*
1286          * Allow the "check" option to be passed as a remount option.
1287          * It is not possible to change ufstype option during remount
1288          */
1289         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1290         new_mount_opt = 0;
1291         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1292         if (!ufs_parse_options (data, &new_mount_opt)) {
1293                 unlock_ufs(sb);
1294                 return -EINVAL;
1295         }
1296         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1297                 new_mount_opt |= ufstype;
1298         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1299                 pr_err("ufstype can't be changed during remount\n");
1300                 unlock_ufs(sb);
1301                 return -EINVAL;
1302         }
1303
1304         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1305                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1306                 unlock_ufs(sb);
1307                 return 0;
1308         }
1309
1310         /*
1311          * fs was mouted as rw, remounting ro
1312          */
1313         if (*mount_flags & MS_RDONLY) {
1314                 ufs_put_super_internal(sb);
1315                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1316                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1317                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1318                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1319                         ufs_set_fs_state(sb, usb1, usb3,
1320                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1321                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1322                 sb->s_flags |= MS_RDONLY;
1323         } else {
1324         /*
1325          * fs was mounted as ro, remounting rw
1326          */
1327 #ifndef CONFIG_UFS_FS_WRITE
1328                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1329                 unlock_ufs(sb);
1330                 return -EINVAL;
1331 #else
1332                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1333                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1334                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1335                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1336                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1337                         pr_err("this ufstype is read-only supported\n");
1338                         unlock_ufs(sb);
1339                         return -EINVAL;
1340                 }
1341                 if (!ufs_read_cylinder_structures(sb)) {
1342                         pr_err("failed during remounting\n");
1343                         unlock_ufs(sb);
1344                         return -EPERM;
1345                 }
1346                 sb->s_flags &= ~MS_RDONLY;
1347 #endif
1348         }
1349         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1350         unlock_ufs(sb);
1351         return 0;
1352 }
1353
1354 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1355 {
1356         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1357         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1358         const struct match_token *tp = tokens;
1359
1360         while (tp->token != Opt_onerror_panic && tp->token != mval)
1361                 ++tp;
1362         BUG_ON(tp->token == Opt_onerror_panic);
1363         seq_printf(seq, ",%s", tp->pattern);
1364
1365         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1366         while (tp->token != Opt_err && tp->token != mval)
1367                 ++tp;
1368         BUG_ON(tp->token == Opt_err);
1369         seq_printf(seq, ",%s", tp->pattern);
1370
1371         return 0;
1372 }
1373
1374 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1375 {
1376         struct super_block *sb = dentry->d_sb;
1377         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1378         unsigned  flags = UFS_SB(sb)->s_flags;
1379         struct ufs_super_block_third *usb3;
1380         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1381
1382         lock_ufs(sb);
1383
1384         usb3 = ubh_get_usb_third(uspi);
1385
1386         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1387                 buf->f_type = UFS2_MAGIC;
1388                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1389         } else {
1390                 buf->f_type = UFS_MAGIC;
1391                 buf->f_blocks = uspi->s_dsize;
1392         }
1393         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1394                 uspi->cs_total.cs_nffree;
1395         buf->f_ffree = uspi->cs_total.cs_nifree;
1396         buf->f_bsize = sb->s_blocksize;
1397         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1398                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1399         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1400         buf->f_namelen = UFS_MAXNAMLEN;
1401         buf->f_fsid.val[0] = (u32)id;
1402         buf->f_fsid.val[1] = (u32)(id >> 32);
1403
1404         unlock_ufs(sb);
1405
1406         return 0;
1407 }
1408
1409 static struct kmem_cache * ufs_inode_cachep;
1410
1411 static struct inode *ufs_alloc_inode(struct super_block *sb)
1412 {
1413         struct ufs_inode_info *ei;
1414
1415         ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1416         if (!ei)
1417                 return NULL;
1418
1419         ei->vfs_inode.i_version = 1;
1420         return &ei->vfs_inode;
1421 }
1422
1423 static void ufs_i_callback(struct rcu_head *head)
1424 {
1425         struct inode *inode = container_of(head, struct inode, i_rcu);
1426         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1427 }
1428
1429 static void ufs_destroy_inode(struct inode *inode)
1430 {
1431         call_rcu(&inode->i_rcu, ufs_i_callback);
1432 }
1433
1434 static void init_once(void *foo)
1435 {
1436         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1437
1438         inode_init_once(&ei->vfs_inode);
1439 }
1440
1441 static int __init init_inodecache(void)
1442 {
1443         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1444                                              sizeof(struct ufs_inode_info),
1445                                              0, (SLAB_RECLAIM_ACCOUNT|
1446                                                 SLAB_MEM_SPREAD),
1447                                              init_once);
1448         if (ufs_inode_cachep == NULL)
1449                 return -ENOMEM;
1450         return 0;
1451 }
1452
1453 static void destroy_inodecache(void)
1454 {
1455         /*
1456          * Make sure all delayed rcu free inodes are flushed before we
1457          * destroy cache.
1458          */
1459         rcu_barrier();
1460         kmem_cache_destroy(ufs_inode_cachep);
1461 }
1462
1463 static const struct super_operations ufs_super_ops = {
1464         .alloc_inode    = ufs_alloc_inode,
1465         .destroy_inode  = ufs_destroy_inode,
1466         .write_inode    = ufs_write_inode,
1467         .evict_inode    = ufs_evict_inode,
1468         .put_super      = ufs_put_super,
1469         .sync_fs        = ufs_sync_fs,
1470         .statfs         = ufs_statfs,
1471         .remount_fs     = ufs_remount,
1472         .show_options   = ufs_show_options,
1473 };
1474
1475 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1476         int flags, const char *dev_name, void *data)
1477 {
1478         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1479 }
1480
1481 static struct file_system_type ufs_fs_type = {
1482         .owner          = THIS_MODULE,
1483         .name           = "ufs",
1484         .mount          = ufs_mount,
1485         .kill_sb        = kill_block_super,
1486         .fs_flags       = FS_REQUIRES_DEV,
1487 };
1488 MODULE_ALIAS_FS("ufs");
1489
1490 static int __init init_ufs_fs(void)
1491 {
1492         int err = init_inodecache();
1493         if (err)
1494                 goto out1;
1495         err = register_filesystem(&ufs_fs_type);
1496         if (err)
1497                 goto out;
1498         return 0;
1499 out:
1500         destroy_inodecache();
1501 out1:
1502         return err;
1503 }
1504
1505 static void __exit exit_ufs_fs(void)
1506 {
1507         unregister_filesystem(&ufs_fs_type);
1508         destroy_inodecache();
1509 }
1510
1511 module_init(init_ufs_fs)
1512 module_exit(exit_ufs_fs)
1513 MODULE_LICENSE("GPL");