kernel/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(d_inode(child), &dot_dot);
 148         if (!ino)
 149                 return ERR_PTR(-ENOENT);
 150         return d_obtain_alias(ufs_iget(d_inode(child)->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         mutex_lock(&UFS_SB(sb)->s_lock);
 698
 699         UFSD("ENTER\n");
 700
 701         flags = UFS_SB(sb)->s_flags;
 702         uspi = UFS_SB(sb)->s_uspi;
 703         usb1 = ubh_get_usb_first(uspi);
 704         usb3 = ubh_get_usb_third(uspi);
 705
 706         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
 707         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
 708             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 709             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 710                 ufs_set_fs_state(sb, usb1, usb3,
 711                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 712         ufs_put_cstotal(sb);
 713
 714         UFSD("EXIT\n");
 715         mutex_unlock(&UFS_SB(sb)->s_lock);
 716         unlock_ufs(sb);
 717
 718         return 0;
 719 }
 720
 721 static void delayed_sync_fs(struct work_struct *work)
 722 {
 723         struct ufs_sb_info *sbi;
 724
 725         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
 726
 727         spin_lock(&sbi->work_lock);
 728         sbi->work_queued = 0;
 729         spin_unlock(&sbi->work_lock);
 730
 731         ufs_sync_fs(sbi->sb, 1);
 732 }
 733
 734 void ufs_mark_sb_dirty(struct super_block *sb)
 735 {
 736         struct ufs_sb_info *sbi = UFS_SB(sb);
 737         unsigned long delay;
 738
 739         spin_lock(&sbi->work_lock);
 740         if (!sbi->work_queued) {
 741                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
 742                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
 743                 sbi->work_queued = 1;
 744         }
 745         spin_unlock(&sbi->work_lock);
 746 }
 747
 748 static void ufs_put_super(struct super_block *sb)
 749 {
 750         struct ufs_sb_info * sbi = UFS_SB(sb);
 751
 752         UFSD("ENTER\n");
 753
 754         if (!(sb->s_flags & MS_RDONLY))
 755                 ufs_put_super_internal(sb);
 756         cancel_delayed_work_sync(&sbi->sync_work);
 757
 758         ubh_brelse_uspi (sbi->s_uspi);
 759         kfree (sbi->s_uspi);
 760         mutex_destroy(&sbi->mutex);
 761         kfree (sbi);
 762         sb->s_fs_info = NULL;
 763         UFSD("EXIT\n");
 764         return;
 765 }
 766
 767 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 768 {
 769         struct ufs_sb_info * sbi;
 770         struct ufs_sb_private_info * uspi;
 771         struct ufs_super_block_first * usb1;
 772         struct ufs_super_block_second * usb2;
 773         struct ufs_super_block_third * usb3;
 774         struct ufs_buffer_head * ubh;
 775         struct inode *inode;
 776         unsigned block_size, super_block_size;
 777         unsigned flags;
 778         unsigned super_block_offset;
 779         unsigned maxsymlen;
 780         int ret = -EINVAL;
 781
 782         uspi = NULL;
 783         ubh = NULL;
 784         flags = 0;
 785
 786         UFSD("ENTER\n");
 787
 788 #ifndef CONFIG_UFS_FS_WRITE
 789         if (!(sb->s_flags & MS_RDONLY)) {
 790                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 791                 return -EROFS;
 792         }
 793 #endif
 794
 795         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 796         if (!sbi)
 797                 goto failed_nomem;
 798         sb->s_fs_info = sbi;
 799         sbi->sb = sb;
 800
 801         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 802
 803         mutex_init(&sbi->mutex);
 804         mutex_init(&sbi->s_lock);
 805         spin_lock_init(&sbi->work_lock);
 806         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
 807         /*
 808          * Set default mount options
 809          * Parse mount options
 810          */
 811         sbi->s_mount_opt = 0;
 812         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 813         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 814                 pr_err("wrong mount options\n");
 815                 goto failed;
 816         }
 817         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 818                 if (!silent)
 819                         pr_err("You didn't specify the type of your ufs filesystem\n\n"
 820                         "mount -t ufs -o ufstype="
 821                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 822                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 823                         "default is ufstype=old\n");
 824                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 825         }
 826
 827         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 828         sbi->s_uspi = uspi;
 829         if (!uspi)
 830                 goto failed;
 831         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 832         super_block_offset=UFS_SBLOCK;
 833
 834         /* Keep 2Gig file limit. Some UFS variants need to override
 835            this but as I don't know which I'll let those in the know loosen
 836            the rules */
 837         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 838         case UFS_MOUNT_UFSTYPE_44BSD:
 839                 UFSD("ufstype=44bsd\n");
 840                 uspi->s_fsize = block_size = 512;
 841                 uspi->s_fmask = ~(512 - 1);
 842                 uspi->s_fshift = 9;
 843                 uspi->s_sbsize = super_block_size = 1536;
 844                 uspi->s_sbbase = 0;
 845                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 846                 break;
 847         case UFS_MOUNT_UFSTYPE_UFS2:
 848                 UFSD("ufstype=ufs2\n");
 849                 super_block_offset=SBLOCK_UFS2;
 850                 uspi->s_fsize = block_size = 512;
 851                 uspi->s_fmask = ~(512 - 1);
 852                 uspi->s_fshift = 9;
 853                 uspi->s_sbsize = super_block_size = 1536;
 854                 uspi->s_sbbase =  0;
 855                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 856                 break;
 857
 858         case UFS_MOUNT_UFSTYPE_SUN:
 859                 UFSD("ufstype=sun\n");
 860                 uspi->s_fsize = block_size = 1024;
 861                 uspi->s_fmask = ~(1024 - 1);
 862                 uspi->s_fshift = 10;
 863                 uspi->s_sbsize = super_block_size = 2048;
 864                 uspi->s_sbbase = 0;
 865                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 866                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 867                 break;
 868
 869         case UFS_MOUNT_UFSTYPE_SUNOS:
 870                 UFSD("ufstype=sunos\n");
 871                 uspi->s_fsize = block_size = 1024;
 872                 uspi->s_fmask = ~(1024 - 1);
 873                 uspi->s_fshift = 10;
 874                 uspi->s_sbsize = 2048;
 875                 super_block_size = 2048;
 876                 uspi->s_sbbase = 0;
 877                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 878                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 879                 break;
 880
 881         case UFS_MOUNT_UFSTYPE_SUNx86:
 882                 UFSD("ufstype=sunx86\n");
 883                 uspi->s_fsize = block_size = 1024;
 884                 uspi->s_fmask = ~(1024 - 1);
 885                 uspi->s_fshift = 10;
 886                 uspi->s_sbsize = super_block_size = 2048;
 887                 uspi->s_sbbase = 0;
 888                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 889                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 890                 break;
 891
 892         case UFS_MOUNT_UFSTYPE_OLD:
 893                 UFSD("ufstype=old\n");
 894                 uspi->s_fsize = block_size = 1024;
 895                 uspi->s_fmask = ~(1024 - 1);
 896                 uspi->s_fshift = 10;
 897                 uspi->s_sbsize = super_block_size = 2048;
 898                 uspi->s_sbbase = 0;
 899                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 900                 if (!(sb->s_flags & MS_RDONLY)) {
 901                         if (!silent)
 902                                 pr_info("ufstype=old is supported read-only\n");
 903                         sb->s_flags |= MS_RDONLY;
 904                 }
 905                 break;
 906
 907         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 908                 UFSD("ufstype=nextstep\n");
 909                 uspi->s_fsize = block_size = 1024;
 910                 uspi->s_fmask = ~(1024 - 1);
 911                 uspi->s_fshift = 10;
 912                 uspi->s_sbsize = super_block_size = 2048;
 913                 uspi->s_sbbase = 0;
 914                 uspi->s_dirblksize = 1024;
 915                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 916                 if (!(sb->s_flags & MS_RDONLY)) {
 917                         if (!silent)
 918                                 pr_info("ufstype=nextstep is supported read-only\n");
 919                         sb->s_flags |= MS_RDONLY;
 920                 }
 921                 break;
 922
 923         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 924                 UFSD("ufstype=nextstep-cd\n");
 925                 uspi->s_fsize = block_size = 2048;
 926                 uspi->s_fmask = ~(2048 - 1);
 927                 uspi->s_fshift = 11;
 928                 uspi->s_sbsize = super_block_size = 2048;
 929                 uspi->s_sbbase = 0;
 930                 uspi->s_dirblksize = 1024;
 931                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 932                 if (!(sb->s_flags & MS_RDONLY)) {
 933                         if (!silent)
 934                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
 935                         sb->s_flags |= MS_RDONLY;
 936                 }
 937                 break;
 938
 939         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 940                 UFSD("ufstype=openstep\n");
 941                 uspi->s_fsize = block_size = 1024;
 942                 uspi->s_fmask = ~(1024 - 1);
 943                 uspi->s_fshift = 10;
 944                 uspi->s_sbsize = super_block_size = 2048;
 945                 uspi->s_sbbase = 0;
 946                 uspi->s_dirblksize = 1024;
 947                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 948                 if (!(sb->s_flags & MS_RDONLY)) {
 949                         if (!silent)
 950                                 pr_info("ufstype=openstep is supported read-only\n");
 951                         sb->s_flags |= MS_RDONLY;
 952                 }
 953                 break;
 954
 955         case UFS_MOUNT_UFSTYPE_HP:
 956                 UFSD("ufstype=hp\n");
 957                 uspi->s_fsize = block_size = 1024;
 958                 uspi->s_fmask = ~(1024 - 1);
 959                 uspi->s_fshift = 10;
 960                 uspi->s_sbsize = super_block_size = 2048;
 961                 uspi->s_sbbase = 0;
 962                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 963                 if (!(sb->s_flags & MS_RDONLY)) {
 964                         if (!silent)
 965                                 pr_info("ufstype=hp is supported read-only\n");
 966                         sb->s_flags |= MS_RDONLY;
 967                 }
 968                 break;
 969         default:
 970                 if (!silent)
 971                         pr_err("unknown ufstype\n");
 972                 goto failed;
 973         }
 974
 975 again:
 976         if (!sb_set_blocksize(sb, block_size)) {
 977                 pr_err("failed to set blocksize\n");
 978                 goto failed;
 979         }
 980
 981         /*
 982          * read ufs super block from device
 983          */
 984
 985         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 986
 987         if (!ubh)
 988             goto failed;
 989
 990         usb1 = ubh_get_usb_first(uspi);
 991         usb2 = ubh_get_usb_second(uspi);
 992         usb3 = ubh_get_usb_third(uspi);
 993
 994         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 995         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 996         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 997             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 998                 flags &= ~UFS_ST_MASK;
 999                 flags |=  UFS_ST_SUN;
1000         }
1001
1002         /*
1003          * Check ufs magic number
1004          */
1005         sbi->s_bytesex = BYTESEX_LE;
1006         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1007                 case UFS_MAGIC:
1008                 case UFS_MAGIC_BW:
1009                 case UFS2_MAGIC:
1010                 case UFS_MAGIC_LFN:
1011                 case UFS_MAGIC_FEA:
1012                 case UFS_MAGIC_4GB:
1013                         goto magic_found;
1014         }
1015         sbi->s_bytesex = BYTESEX_BE;
1016         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1017                 case UFS_MAGIC:
1018                 case UFS_MAGIC_BW:
1019                 case UFS2_MAGIC:
1020                 case UFS_MAGIC_LFN:
1021                 case UFS_MAGIC_FEA:
1022                 case UFS_MAGIC_4GB:
1023                         goto magic_found;
1024         }
1025
1026         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1027           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1028           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1029           && uspi->s_sbbase < 256) {
1030                 ubh_brelse_uspi(uspi);
1031                 ubh = NULL;
1032                 uspi->s_sbbase += 8;
1033                 goto again;
1034         }
1035         if (!silent)
1036                 pr_err("%s(): bad magic number\n", __func__);
1037         goto failed;
1038
1039 magic_found:
1040         /*
1041          * Check block and fragment sizes
1042          */
1043         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1044         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1045         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1046         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1047         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1048
1049         if (!is_power_of_2(uspi->s_fsize)) {
1050                 pr_err("%s(): fragment size %u is not a power of 2\n",
1051                        __func__, uspi->s_fsize);
1052                 goto failed;
1053         }
1054         if (uspi->s_fsize < 512) {
1055                 pr_err("%s(): fragment size %u is too small\n",
1056                        __func__, uspi->s_fsize);
1057                 goto failed;
1058         }
1059         if (uspi->s_fsize > 4096) {
1060                 pr_err("%s(): fragment size %u is too large\n",
1061                        __func__, uspi->s_fsize);
1062                 goto failed;
1063         }
1064         if (!is_power_of_2(uspi->s_bsize)) {
1065                 pr_err("%s(): block size %u is not a power of 2\n",
1066                        __func__, uspi->s_bsize);
1067                 goto failed;
1068         }
1069         if (uspi->s_bsize < 4096) {
1070                 pr_err("%s(): block size %u is too small\n",
1071                        __func__, uspi->s_bsize);
1072                 goto failed;
1073         }
1074         if (uspi->s_bsize / uspi->s_fsize > 8) {
1075                 pr_err("%s(): too many fragments per block (%u)\n",
1076                        __func__, uspi->s_bsize / uspi->s_fsize);
1077                 goto failed;
1078         }
1079         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1080                 ubh_brelse_uspi(uspi);
1081                 ubh = NULL;
1082                 block_size = uspi->s_fsize;
1083                 super_block_size = uspi->s_sbsize;
1084                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1085                 goto again;
1086         }
1087
1088         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1089         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1090
1091         /*
1092          * Check, if file system was correctly unmounted.
1093          * If not, make it read only.
1094          */
1095         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1096           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1097           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1098             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1099           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1100           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1101                 switch(usb1->fs_clean) {
1102                 case UFS_FSCLEAN:
1103                         UFSD("fs is clean\n");
1104                         break;
1105                 case UFS_FSSTABLE:
1106                         UFSD("fs is stable\n");
1107                         break;
1108                 case UFS_FSLOG:
1109                         UFSD("fs is logging fs\n");
1110                         break;
1111                 case UFS_FSOSF1:
1112                         UFSD("fs is DEC OSF/1\n");
1113                         break;
1114                 case UFS_FSACTIVE:
1115                         pr_err("%s(): fs is active\n", __func__);
1116                         sb->s_flags |= MS_RDONLY;
1117                         break;
1118                 case UFS_FSBAD:
1119                         pr_err("%s(): fs is bad\n", __func__);
1120                         sb->s_flags |= MS_RDONLY;
1121                         break;
1122                 default:
1123                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1124                                __func__, usb1->fs_clean);
1125                         sb->s_flags |= MS_RDONLY;
1126                         break;
1127                 }
1128         } else {
1129                 pr_err("%s(): fs needs fsck\n", __func__);
1130                 sb->s_flags |= MS_RDONLY;
1131         }
1132
1133         /*
1134          * Read ufs_super_block into internal data structures
1135          */
1136         sb->s_op = &ufs_super_ops;
1137         sb->s_export_op = &ufs_export_ops;
1138
1139         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1140
1141         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1142         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1143         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1144         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1145         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1146         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1147
1148         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1149                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1150                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1151         } else {
1152                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1153                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1154         }
1155
1156         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1157         /* s_bsize already set */
1158         /* s_fsize already set */
1159         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1160         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1161         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1162         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1163         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1164         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1165         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1166                 uspi->s_fshift);
1167         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1168         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1169         /* s_sbsize already set */
1170         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1171         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1172         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1173         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1174         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1175         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1176         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1177         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1178
1179         if (uspi->fs_magic == UFS2_MAGIC)
1180                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1181         else
1182                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1183
1184         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1185         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1186         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1187         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1188         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1189         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1190         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1191         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1192         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1193         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1194         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1195         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1196         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1197         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1198
1199         /*
1200          * Compute another frequently used values
1201          */
1202         uspi->s_fpbmask = uspi->s_fpb - 1;
1203         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1204                 uspi->s_apbshift = uspi->s_bshift - 3;
1205         else
1206                 uspi->s_apbshift = uspi->s_bshift - 2;
1207
1208         uspi->s_2apbshift = uspi->s_apbshift * 2;
1209         uspi->s_3apbshift = uspi->s_apbshift * 3;
1210         uspi->s_apb = 1 << uspi->s_apbshift;
1211         uspi->s_2apb = 1 << uspi->s_2apbshift;
1212         uspi->s_3apb = 1 << uspi->s_3apbshift;
1213         uspi->s_apbmask = uspi->s_apb - 1;
1214         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1215         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1216         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1217         uspi->s_bpf = uspi->s_fsize << 3;
1218         uspi->s_bpfshift = uspi->s_fshift + 3;
1219         uspi->s_bpfmask = uspi->s_bpf - 1;
1220         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1221             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1222                 uspi->s_maxsymlinklen =
1223                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1224
1225         if (uspi->fs_magic == UFS2_MAGIC)
1226                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1227         else
1228                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1229         if (uspi->s_maxsymlinklen > maxsymlen) {
1230                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1231                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1232                 uspi->s_maxsymlinklen = maxsymlen;
1233         }
1234         sb->s_max_links = UFS_LINK_MAX;
1235
1236         inode = ufs_iget(sb, UFS_ROOTINO);
1237         if (IS_ERR(inode)) {
1238                 ret = PTR_ERR(inode);
1239                 goto failed;
1240         }
1241         sb->s_root = d_make_root(inode);
1242         if (!sb->s_root) {
1243                 ret = -ENOMEM;
1244                 goto failed;
1245         }
1246
1247         ufs_setup_cstotal(sb);
1248         /*
1249          * Read cylinder group structures
1250          */
1251         if (!(sb->s_flags & MS_RDONLY))
1252                 if (!ufs_read_cylinder_structures(sb))
1253                         goto failed;
1254
1255         UFSD("EXIT\n");
1256         return 0;
1257
1258 failed:
1259         mutex_destroy(&sbi->mutex);
1260         if (ubh)
1261                 ubh_brelse_uspi (uspi);
1262         kfree (uspi);
1263         kfree(sbi);
1264         sb->s_fs_info = NULL;
1265         UFSD("EXIT (FAILED)\n");
1266         return ret;
1267
1268 failed_nomem:
1269         UFSD("EXIT (NOMEM)\n");
1270         return -ENOMEM;
1271 }
1272
1273 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1274 {
1275         struct ufs_sb_private_info * uspi;
1276         struct ufs_super_block_first * usb1;
1277         struct ufs_super_block_third * usb3;
1278         unsigned new_mount_opt, ufstype;
1279         unsigned flags;
1280
1281         sync_filesystem(sb);
1282         lock_ufs(sb);
1283         mutex_lock(&UFS_SB(sb)->s_lock);
1284         uspi = UFS_SB(sb)->s_uspi;
1285         flags = UFS_SB(sb)->s_flags;
1286         usb1 = ubh_get_usb_first(uspi);
1287         usb3 = ubh_get_usb_third(uspi);
1288
1289         /*
1290          * Allow the "check" option to be passed as a remount option.
1291          * It is not possible to change ufstype option during remount
1292          */
1293         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1294         new_mount_opt = 0;
1295         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1296         if (!ufs_parse_options (data, &new_mount_opt)) {
1297                 mutex_unlock(&UFS_SB(sb)->s_lock);
1298                 unlock_ufs(sb);
1299                 return -EINVAL;
1300         }
1301         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1302                 new_mount_opt |= ufstype;
1303         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1304                 pr_err("ufstype can't be changed during remount\n");
1305                 mutex_unlock(&UFS_SB(sb)->s_lock);
1306                 unlock_ufs(sb);
1307                 return -EINVAL;
1308         }
1309
1310         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1311                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1312                 mutex_unlock(&UFS_SB(sb)->s_lock);
1313                 unlock_ufs(sb);
1314                 return 0;
1315         }
1316
1317         /*
1318          * fs was mouted as rw, remounting ro
1319          */
1320         if (*mount_flags & MS_RDONLY) {
1321                 ufs_put_super_internal(sb);
1322                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1323                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1324                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1325                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1326                         ufs_set_fs_state(sb, usb1, usb3,
1327                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1328                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1329                 sb->s_flags |= MS_RDONLY;
1330         } else {
1331         /*
1332          * fs was mounted as ro, remounting rw
1333          */
1334 #ifndef CONFIG_UFS_FS_WRITE
1335                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1336                 mutex_unlock(&UFS_SB(sb)->s_lock);
1337                 unlock_ufs(sb);
1338                 return -EINVAL;
1339 #else
1340                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1341                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1342                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1343                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1344                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1345                         pr_err("this ufstype is read-only supported\n");
1346                         mutex_unlock(&UFS_SB(sb)->s_lock);
1347                         unlock_ufs(sb);
1348                         return -EINVAL;
1349                 }
1350                 if (!ufs_read_cylinder_structures(sb)) {
1351                         pr_err("failed during remounting\n");
1352                         mutex_unlock(&UFS_SB(sb)->s_lock);
1353                         unlock_ufs(sb);
1354                         return -EPERM;
1355                 }
1356                 sb->s_flags &= ~MS_RDONLY;
1357 #endif
1358         }
1359         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1360         mutex_unlock(&UFS_SB(sb)->s_lock);
1361         unlock_ufs(sb);
1362         return 0;
1363 }
1364
1365 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1366 {
1367         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1368         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1369         const struct match_token *tp = tokens;
1370
1371         while (tp->token != Opt_onerror_panic && tp->token != mval)
1372                 ++tp;
1373         BUG_ON(tp->token == Opt_onerror_panic);
1374         seq_printf(seq, ",%s", tp->pattern);
1375
1376         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1377         while (tp->token != Opt_err && tp->token != mval)
1378                 ++tp;
1379         BUG_ON(tp->token == Opt_err);
1380         seq_printf(seq, ",%s", tp->pattern);
1381
1382         return 0;
1383 }
1384
1385 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1386 {
1387         struct super_block *sb = dentry->d_sb;
1388         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1389         unsigned  flags = UFS_SB(sb)->s_flags;
1390         struct ufs_super_block_third *usb3;
1391         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1392
1393         lock_ufs(sb);
1394
1395         usb3 = ubh_get_usb_third(uspi);
1396
1397         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1398                 buf->f_type = UFS2_MAGIC;
1399                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1400         } else {
1401                 buf->f_type = UFS_MAGIC;
1402                 buf->f_blocks = uspi->s_dsize;
1403         }
1404         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1405                 uspi->cs_total.cs_nffree;
1406         buf->f_ffree = uspi->cs_total.cs_nifree;
1407         buf->f_bsize = sb->s_blocksize;
1408         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1409                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1410         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1411         buf->f_namelen = UFS_MAXNAMLEN;
1412         buf->f_fsid.val[0] = (u32)id;
1413         buf->f_fsid.val[1] = (u32)(id >> 32);
1414
1415         unlock_ufs(sb);
1416
1417         return 0;
1418 }
1419
1420 static struct kmem_cache * ufs_inode_cachep;
1421
1422 static struct inode *ufs_alloc_inode(struct super_block *sb)
1423 {
1424         struct ufs_inode_info *ei;
1425
1426         ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1427         if (!ei)
1428                 return NULL;
1429
1430         ei->vfs_inode.i_version = 1;
1431         return &ei->vfs_inode;
1432 }
1433
1434 static void ufs_i_callback(struct rcu_head *head)
1435 {
1436         struct inode *inode = container_of(head, struct inode, i_rcu);
1437         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1438 }
1439
1440 static void ufs_destroy_inode(struct inode *inode)
1441 {
1442         call_rcu(&inode->i_rcu, ufs_i_callback);
1443 }
1444
1445 static void init_once(void *foo)
1446 {
1447         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1448
1449         inode_init_once(&ei->vfs_inode);
1450 }
1451
1452 static int __init init_inodecache(void)
1453 {
1454         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1455                                              sizeof(struct ufs_inode_info),
1456                                              0, (SLAB_RECLAIM_ACCOUNT|
1457                                                 SLAB_MEM_SPREAD),
1458                                              init_once);
1459         if (ufs_inode_cachep == NULL)
1460                 return -ENOMEM;
1461         return 0;
1462 }
1463
1464 static void destroy_inodecache(void)
1465 {
1466         /*
1467          * Make sure all delayed rcu free inodes are flushed before we
1468          * destroy cache.
1469          */
1470         rcu_barrier();
1471         kmem_cache_destroy(ufs_inode_cachep);
1472 }
1473
1474 static const struct super_operations ufs_super_ops = {
1475         .alloc_inode    = ufs_alloc_inode,
1476         .destroy_inode  = ufs_destroy_inode,
1477         .write_inode    = ufs_write_inode,
1478         .evict_inode    = ufs_evict_inode,
1479         .put_super      = ufs_put_super,
1480         .sync_fs        = ufs_sync_fs,
1481         .statfs         = ufs_statfs,
1482         .remount_fs     = ufs_remount,
1483         .show_options   = ufs_show_options,
1484 };
1485
1486 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1487         int flags, const char *dev_name, void *data)
1488 {
1489         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1490 }
1491
1492 static struct file_system_type ufs_fs_type = {
1493         .owner          = THIS_MODULE,
1494         .name           = "ufs",
1495         .mount          = ufs_mount,
1496         .kill_sb        = kill_block_super,
1497         .fs_flags       = FS_REQUIRES_DEV,
1498 };
1499 MODULE_ALIAS_FS("ufs");
1500
1501 static int __init init_ufs_fs(void)
1502 {
1503         int err = init_inodecache();
1504         if (err)
1505                 goto out1;
1506         err = register_filesystem(&ufs_fs_type);
1507         if (err)
1508                 goto out;
1509         return 0;
1510 out:
1511         destroy_inodecache();
1512 out1:
1513         return err;
1514 }
1515
1516 static void __exit exit_ufs_fs(void)
1517 {
1518         unregister_filesystem(&ufs_fs_type);
1519         destroy_inodecache();
1520 }
1521
1522 module_init(init_ufs_fs)
1523 module_exit(exit_ufs_fs)
1524 MODULE_LICENSE("GPL");