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/backing-dev.h>
  84 #include <linux/init.h>
  85 #include <linux/parser.h>
  86 #include <linux/buffer_head.h>
  87 #include <linux/vfs.h>
  88 #include <linux/log2.h>
  89 #include <linux/mount.h>
  90 #include <linux/seq_file.h>
  91
  92 #include "ufs_fs.h"
  93 #include "ufs.h"
  94 #include "swab.h"
  95 #include "util.h"
  96
  97 void lock_ufs(struct super_block *sb)
  98 {
  99         struct ufs_sb_info *sbi = UFS_SB(sb);
 100
 101         mutex_lock(&sbi->mutex);
 102         sbi->mutex_owner = current;
 103 }
 104
 105 void unlock_ufs(struct super_block *sb)
 106 {
 107         struct ufs_sb_info *sbi = UFS_SB(sb);
 108
 109         sbi->mutex_owner = NULL;
 110         mutex_unlock(&sbi->mutex);
 111 }
 112
 113 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 114 {
 115         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 116         struct inode *inode;
 117
 118         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 119                 return ERR_PTR(-ESTALE);
 120
 121         inode = ufs_iget(sb, ino);
 122         if (IS_ERR(inode))
 123                 return ERR_CAST(inode);
 124         if (generation && inode->i_generation != generation) {
 125                 iput(inode);
 126                 return ERR_PTR(-ESTALE);
 127         }
 128         return inode;
 129 }
 130
 131 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 132                                        int fh_len, int fh_type)
 133 {
 134         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 135 }
 136
 137 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 138                                        int fh_len, int fh_type)
 139 {
 140         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 141 }
 142
 143 static struct dentry *ufs_get_parent(struct dentry *child)
 144 {
 145         struct qstr dot_dot = QSTR_INIT("..", 2);
 146         ino_t ino;
 147
 148         ino = ufs_inode_by_name(d_inode(child), &dot_dot);
 149         if (!ino)
 150                 return ERR_PTR(-ENOENT);
 151         return d_obtain_alias(ufs_iget(d_inode(child)->i_sb, ino));
 152 }
 153
 154 static const struct export_operations ufs_export_ops = {
 155         .fh_to_dentry   = ufs_fh_to_dentry,
 156         .fh_to_parent   = ufs_fh_to_parent,
 157         .get_parent     = ufs_get_parent,
 158 };
 159
 160 #ifdef CONFIG_UFS_DEBUG
 161 /*
 162  * Print contents of ufs_super_block, useful for debugging
 163  */
 164 static void ufs_print_super_stuff(struct super_block *sb,
 165                                   struct ufs_super_block_first *usb1,
 166                                   struct ufs_super_block_second *usb2,
 167                                   struct ufs_super_block_third *usb3)
 168 {
 169         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 170
 171         pr_debug("ufs_print_super_stuff\n");
 172         pr_debug("  magic:     0x%x\n", magic);
 173         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 174                 pr_debug("  fs_size:   %llu\n", (unsigned long long)
 175                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 176                 pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
 177                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 178                 pr_debug("  bsize:         %u\n",
 179                          fs32_to_cpu(sb, usb1->fs_bsize));
 180                 pr_debug("  fsize:         %u\n",
 181                          fs32_to_cpu(sb, usb1->fs_fsize));
 182                 pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 183                 pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
 184                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 185                 pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 186                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 187                 pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
 188                          (unsigned long long)
 189                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 190                 pr_info("  cs_nifree(Num of free inodes): %llu\n",
 191                         (unsigned long long)
 192                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 193                 pr_info("  cs_nffree(Num of free frags): %llu\n",
 194                         (unsigned long long)
 195                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 196                 pr_info("  fs_maxsymlinklen: %u\n",
 197                         fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 198         } else {
 199                 pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 200                 pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 201                 pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 202                 pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 203                 pr_debug(" cgoffset:    %u\n",
 204                          fs32_to_cpu(sb, usb1->fs_cgoffset));
 205                 pr_debug(" ~cgmask:     0x%x\n",
 206                          ~fs32_to_cpu(sb, usb1->fs_cgmask));
 207                 pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 208                 pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 209                 pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 210                 pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 211                 pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 212                 pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 213                 pr_debug(" fragshift:   %u\n",
 214                          fs32_to_cpu(sb, usb1->fs_fragshift));
 215                 pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 216                 pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 217                 pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 218                 pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 219                 pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 220                 pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 221                 pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 222                 pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 223                 pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 224                 pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 225                 pr_debug(" fstodb:      %u\n",
 226                          fs32_to_cpu(sb, usb1->fs_fsbtodb));
 227                 pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 228                 pr_debug(" ndir         %u\n",
 229                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 230                 pr_debug(" nifree       %u\n",
 231                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 232                 pr_debug(" nbfree       %u\n",
 233                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 234                 pr_debug(" nffree       %u\n",
 235                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 236         }
 237         pr_debug("\n");
 238 }
 239
 240 /*
 241  * Print contents of ufs_cylinder_group, useful for debugging
 242  */
 243 static void ufs_print_cylinder_stuff(struct super_block *sb,
 244                                      struct ufs_cylinder_group *cg)
 245 {
 246         pr_debug("\nufs_print_cylinder_stuff\n");
 247         pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 248         pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 249         pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 250         pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 251         pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 252         pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 253         pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 254         pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 255         pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 256         pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 257         pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 258         pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 259         pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 260         pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 261         pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 262             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 263             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 264             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 265             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 266         pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 267         pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 268         pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 269         pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 270         pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 271         pr_debug("  clustersumoff %u\n",
 272                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 273         pr_debug("  clusteroff    %u\n",
 274                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 275         pr_debug("  nclusterblks  %u\n",
 276                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 277         pr_debug("\n");
 278 }
 279 #else
 280 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 281 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 282 #endif /* CONFIG_UFS_DEBUG */
 283
 284 static const struct super_operations ufs_super_ops;
 285
 286 void ufs_error (struct super_block * sb, const char * function,
 287         const char * fmt, ...)
 288 {
 289         struct ufs_sb_private_info * uspi;
 290         struct ufs_super_block_first * usb1;
 291         struct va_format vaf;
 292         va_list args;
 293
 294         uspi = UFS_SB(sb)->s_uspi;
 295         usb1 = ubh_get_usb_first(uspi);
 296
 297         if (!(sb->s_flags & MS_RDONLY)) {
 298                 usb1->fs_clean = UFS_FSBAD;
 299                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 300                 ufs_mark_sb_dirty(sb);
 301                 sb->s_flags |= MS_RDONLY;
 302         }
 303         va_start(args, fmt);
 304         vaf.fmt = fmt;
 305         vaf.va = &args;
 306         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 307         case UFS_MOUNT_ONERROR_PANIC:
 308                 panic("panic (device %s): %s: %pV\n",
 309                       sb->s_id, function, &vaf);
 310
 311         case UFS_MOUNT_ONERROR_LOCK:
 312         case UFS_MOUNT_ONERROR_UMOUNT:
 313         case UFS_MOUNT_ONERROR_REPAIR:
 314                 pr_crit("error (device %s): %s: %pV\n",
 315                         sb->s_id, function, &vaf);
 316         }
 317         va_end(args);
 318 }
 319
 320 void ufs_panic (struct super_block * sb, const char * function,
 321         const char * fmt, ...)
 322 {
 323         struct ufs_sb_private_info * uspi;
 324         struct ufs_super_block_first * usb1;
 325         struct va_format vaf;
 326         va_list args;
 327
 328         uspi = UFS_SB(sb)->s_uspi;
 329         usb1 = ubh_get_usb_first(uspi);
 330
 331         if (!(sb->s_flags & MS_RDONLY)) {
 332                 usb1->fs_clean = UFS_FSBAD;
 333                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 334                 ufs_mark_sb_dirty(sb);
 335         }
 336         va_start(args, fmt);
 337         vaf.fmt = fmt;
 338         vaf.va = &args;
 339         sb->s_flags |= MS_RDONLY;
 340         pr_crit("panic (device %s): %s: %pV\n",
 341                 sb->s_id, function, &vaf);
 342         va_end(args);
 343 }
 344
 345 void ufs_warning (struct super_block * sb, const char * function,
 346         const char * fmt, ...)
 347 {
 348         struct va_format vaf;
 349         va_list args;
 350
 351         va_start(args, fmt);
 352         vaf.fmt = fmt;
 353         vaf.va = &args;
 354         pr_warn("(device %s): %s: %pV\n",
 355                 sb->s_id, function, &vaf);
 356         va_end(args);
 357 }
 358
 359 enum {
 360        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 361        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 362        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 363        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 364        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 365        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 366        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 367        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 368        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 369        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 370        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 371        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 372        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 373        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 374        Opt_err
 375 };
 376
 377 static const match_table_t tokens = {
 378         {Opt_type_old, "ufstype=old"},
 379         {Opt_type_sunx86, "ufstype=sunx86"},
 380         {Opt_type_sun, "ufstype=sun"},
 381         {Opt_type_sunos, "ufstype=sunos"},
 382         {Opt_type_44bsd, "ufstype=44bsd"},
 383         {Opt_type_ufs2, "ufstype=ufs2"},
 384         {Opt_type_ufs2, "ufstype=5xbsd"},
 385         {Opt_type_hp, "ufstype=hp"},
 386         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 387         {Opt_type_nextstep, "ufstype=nextstep"},
 388         {Opt_type_openstep, "ufstype=openstep"},
 389 /*end of possible ufs types */
 390         {Opt_onerror_panic, "onerror=panic"},
 391         {Opt_onerror_lock, "onerror=lock"},
 392         {Opt_onerror_umount, "onerror=umount"},
 393         {Opt_onerror_repair, "onerror=repair"},
 394         {Opt_err, NULL}
 395 };
 396
 397 static int ufs_parse_options (char * options, unsigned * mount_options)
 398 {
 399         char * p;
 400
 401         UFSD("ENTER\n");
 402
 403         if (!options)
 404                 return 1;
 405
 406         while ((p = strsep(&options, ",")) != NULL) {
 407                 substring_t args[MAX_OPT_ARGS];
 408                 int token;
 409                 if (!*p)
 410                         continue;
 411
 412                 token = match_token(p, tokens, args);
 413                 switch (token) {
 414                 case Opt_type_old:
 415                         ufs_clear_opt (*mount_options, UFSTYPE);
 416                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 417                         break;
 418                 case Opt_type_sunx86:
 419                         ufs_clear_opt (*mount_options, UFSTYPE);
 420                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 421                         break;
 422                 case Opt_type_sun:
 423                         ufs_clear_opt (*mount_options, UFSTYPE);
 424                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 425                         break;
 426                 case Opt_type_sunos:
 427                         ufs_clear_opt(*mount_options, UFSTYPE);
 428                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 429                         break;
 430                 case Opt_type_44bsd:
 431                         ufs_clear_opt (*mount_options, UFSTYPE);
 432                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 433                         break;
 434                 case Opt_type_ufs2:
 435                         ufs_clear_opt(*mount_options, UFSTYPE);
 436                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 437                         break;
 438                 case Opt_type_hp:
 439                         ufs_clear_opt (*mount_options, UFSTYPE);
 440                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 441                         break;
 442                 case Opt_type_nextstepcd:
 443                         ufs_clear_opt (*mount_options, UFSTYPE);
 444                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 445                         break;
 446                 case Opt_type_nextstep:
 447                         ufs_clear_opt (*mount_options, UFSTYPE);
 448                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 449                         break;
 450                 case Opt_type_openstep:
 451                         ufs_clear_opt (*mount_options, UFSTYPE);
 452                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 453                         break;
 454                 case Opt_onerror_panic:
 455                         ufs_clear_opt (*mount_options, ONERROR);
 456                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 457                         break;
 458                 case Opt_onerror_lock:
 459                         ufs_clear_opt (*mount_options, ONERROR);
 460                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 461                         break;
 462                 case Opt_onerror_umount:
 463                         ufs_clear_opt (*mount_options, ONERROR);
 464                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 465                         break;
 466                 case Opt_onerror_repair:
 467                         pr_err("Unable to do repair on error, will lock lock instead\n");
 468                         ufs_clear_opt (*mount_options, ONERROR);
 469                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 470                         break;
 471                 default:
 472                         pr_err("Invalid option: \"%s\" or missing value\n", p);
 473                         return 0;
 474                 }
 475         }
 476         return 1;
 477 }
 478
 479 /*
 480  * Different types of UFS hold fs_cstotal in different
 481  * places, and use different data structure for it.
 482  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
 483  */
 484 static void ufs_setup_cstotal(struct super_block *sb)
 485 {
 486         struct ufs_sb_info *sbi = UFS_SB(sb);
 487         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 488         struct ufs_super_block_first *usb1;
 489         struct ufs_super_block_second *usb2;
 490         struct ufs_super_block_third *usb3;
 491         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 492
 493         UFSD("ENTER, mtype=%u\n", mtype);
 494         usb1 = ubh_get_usb_first(uspi);
 495         usb2 = ubh_get_usb_second(uspi);
 496         usb3 = ubh_get_usb_third(uspi);
 497
 498         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 499              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 500             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 501                 /*we have statistic in different place, then usual*/
 502                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 503                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 504                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 505                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 506         } else {
 507                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 508                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 509                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 510                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 511         }
 512         UFSD("EXIT\n");
 513 }
 514
 515 /*
 516  * Read on-disk structures associated with cylinder groups
 517  */
 518 static int ufs_read_cylinder_structures(struct super_block *sb)
 519 {
 520         struct ufs_sb_info *sbi = UFS_SB(sb);
 521         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 522         struct ufs_buffer_head * ubh;
 523         unsigned char * base, * space;
 524         unsigned size, blks, i;
 525
 526         UFSD("ENTER\n");
 527
 528         /*
 529          * Read cs structures from (usually) first data block
 530          * on the device.
 531          */
 532         size = uspi->s_cssize;
 533         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 534         base = space = kmalloc(size, GFP_NOFS);
 535         if (!base)
 536                 goto failed;
 537         sbi->s_csp = (struct ufs_csum *)space;
 538         for (i = 0; i < blks; i += uspi->s_fpb) {
 539                 size = uspi->s_bsize;
 540                 if (i + uspi->s_fpb > blks)
 541                         size = (blks - i) * uspi->s_fsize;
 542
 543                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 544
 545                 if (!ubh)
 546                         goto failed;
 547
 548                 ubh_ubhcpymem (space, ubh, size);
 549
 550                 space += size;
 551                 ubh_brelse (ubh);
 552                 ubh = NULL;
 553         }
 554
 555         /*
 556          * Read cylinder group (we read only first fragment from block
 557          * at this time) and prepare internal data structures for cg caching.
 558          */
 559         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
 560                 goto failed;
 561         for (i = 0; i < uspi->s_ncg; i++)
 562                 sbi->s_ucg[i] = NULL;
 563         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 564                 sbi->s_ucpi[i] = NULL;
 565                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 566         }
 567         for (i = 0; i < uspi->s_ncg; i++) {
 568                 UFSD("read cg %u\n", i);
 569                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 570                         goto failed;
 571                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 572                         goto failed;
 573
 574                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 575         }
 576         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 577                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
 578                         goto failed;
 579                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 580         }
 581         sbi->s_cg_loaded = 0;
 582         UFSD("EXIT\n");
 583         return 1;
 584
 585 failed:
 586         kfree (base);
 587         if (sbi->s_ucg) {
 588                 for (i = 0; i < uspi->s_ncg; i++)
 589                         if (sbi->s_ucg[i])
 590                                 brelse (sbi->s_ucg[i]);
 591                 kfree (sbi->s_ucg);
 592                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 593                         kfree (sbi->s_ucpi[i]);
 594         }
 595         UFSD("EXIT (FAILED)\n");
 596         return 0;
 597 }
 598
 599 /*
 600  * Sync our internal copy of fs_cstotal with disk
 601  */
 602 static void ufs_put_cstotal(struct super_block *sb)
 603 {
 604         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 605         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 606         struct ufs_super_block_first *usb1;
 607         struct ufs_super_block_second *usb2;
 608         struct ufs_super_block_third *usb3;
 609
 610         UFSD("ENTER\n");
 611         usb1 = ubh_get_usb_first(uspi);
 612         usb2 = ubh_get_usb_second(uspi);
 613         usb3 = ubh_get_usb_third(uspi);
 614
 615         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 616              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 617             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 618                 /*we have statistic in different place, then usual*/
 619                 usb2->fs_un.fs_u2.cs_ndir =
 620                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 621                 usb2->fs_un.fs_u2.cs_nbfree =
 622                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 623                 usb3->fs_un1.fs_u2.cs_nifree =
 624                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 625                 usb3->fs_un1.fs_u2.cs_nffree =
 626                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 627         } else {
 628                 usb1->fs_cstotal.cs_ndir =
 629                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 630                 usb1->fs_cstotal.cs_nbfree =
 631                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 632                 usb1->fs_cstotal.cs_nifree =
 633                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 634                 usb1->fs_cstotal.cs_nffree =
 635                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 636         }
 637         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 638         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 639         UFSD("EXIT\n");
 640 }
 641
 642 /**
 643  * ufs_put_super_internal() - put on-disk intrenal structures
 644  * @sb: pointer to super_block structure
 645  * Put on-disk structures associated with cylinder groups
 646  * and write them back to disk, also update cs_total on disk
 647  */
 648 static void ufs_put_super_internal(struct super_block *sb)
 649 {
 650         struct ufs_sb_info *sbi = UFS_SB(sb);
 651         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 652         struct ufs_buffer_head * ubh;
 653         unsigned char * base, * space;
 654         unsigned blks, size, i;
 655
 656
 657         UFSD("ENTER\n");
 658
 659         ufs_put_cstotal(sb);
 660         size = uspi->s_cssize;
 661         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 662         base = space = (char*) sbi->s_csp;
 663         for (i = 0; i < blks; i += uspi->s_fpb) {
 664                 size = uspi->s_bsize;
 665                 if (i + uspi->s_fpb > blks)
 666                         size = (blks - i) * uspi->s_fsize;
 667
 668                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 669
 670                 ubh_memcpyubh (ubh, space, size);
 671                 space += size;
 672                 ubh_mark_buffer_uptodate (ubh, 1);
 673                 ubh_mark_buffer_dirty (ubh);
 674                 ubh_brelse (ubh);
 675         }
 676         for (i = 0; i < sbi->s_cg_loaded; i++) {
 677                 ufs_put_cylinder (sb, i);
 678                 kfree (sbi->s_ucpi[i]);
 679         }
 680         for (; i < UFS_MAX_GROUP_LOADED; i++)
 681                 kfree (sbi->s_ucpi[i]);
 682         for (i = 0; i < uspi->s_ncg; i++)
 683                 brelse (sbi->s_ucg[i]);
 684         kfree (sbi->s_ucg);
 685         kfree (base);
 686
 687         UFSD("EXIT\n");
 688 }
 689
 690 static int ufs_sync_fs(struct super_block *sb, int wait)
 691 {
 692         struct ufs_sb_private_info * uspi;
 693         struct ufs_super_block_first * usb1;
 694         struct ufs_super_block_third * usb3;
 695         unsigned flags;
 696
 697         lock_ufs(sb);
 698         mutex_lock(&UFS_SB(sb)->s_lock);
 699
 700         UFSD("ENTER\n");
 701
 702         flags = UFS_SB(sb)->s_flags;
 703         uspi = UFS_SB(sb)->s_uspi;
 704         usb1 = ubh_get_usb_first(uspi);
 705         usb3 = ubh_get_usb_third(uspi);
 706
 707         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
 708         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
 709             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 710             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 711                 ufs_set_fs_state(sb, usb1, usb3,
 712                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 713         ufs_put_cstotal(sb);
 714
 715         UFSD("EXIT\n");
 716         mutex_unlock(&UFS_SB(sb)->s_lock);
 717         unlock_ufs(sb);
 718
 719         return 0;
 720 }
 721
 722 static void delayed_sync_fs(struct work_struct *work)
 723 {
 724         struct ufs_sb_info *sbi;
 725
 726         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
 727
 728         spin_lock(&sbi->work_lock);
 729         sbi->work_queued = 0;
 730         spin_unlock(&sbi->work_lock);
 731
 732         ufs_sync_fs(sbi->sb, 1);
 733 }
 734
 735 void ufs_mark_sb_dirty(struct super_block *sb)
 736 {
 737         struct ufs_sb_info *sbi = UFS_SB(sb);
 738         unsigned long delay;
 739
 740         spin_lock(&sbi->work_lock);
 741         if (!sbi->work_queued) {
 742                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
 743                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
 744                 sbi->work_queued = 1;
 745         }
 746         spin_unlock(&sbi->work_lock);
 747 }
 748
 749 static void ufs_put_super(struct super_block *sb)
 750 {
 751         struct ufs_sb_info * sbi = UFS_SB(sb);
 752
 753         UFSD("ENTER\n");
 754
 755         if (!(sb->s_flags & MS_RDONLY))
 756                 ufs_put_super_internal(sb);
 757         cancel_delayed_work_sync(&sbi->sync_work);
 758
 759         ubh_brelse_uspi (sbi->s_uspi);
 760         kfree (sbi->s_uspi);
 761         mutex_destroy(&sbi->mutex);
 762         kfree (sbi);
 763         sb->s_fs_info = NULL;
 764         UFSD("EXIT\n");
 765         return;
 766 }
 767
 768 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 769 {
 770         struct ufs_sb_info * sbi;
 771         struct ufs_sb_private_info * uspi;
 772         struct ufs_super_block_first * usb1;
 773         struct ufs_super_block_second * usb2;
 774         struct ufs_super_block_third * usb3;
 775         struct ufs_buffer_head * ubh;
 776         struct inode *inode;
 777         unsigned block_size, super_block_size;
 778         unsigned flags;
 779         unsigned super_block_offset;
 780         unsigned maxsymlen;
 781         int ret = -EINVAL;
 782
 783         uspi = NULL;
 784         ubh = NULL;
 785         flags = 0;
 786
 787         UFSD("ENTER\n");
 788
 789 #ifndef CONFIG_UFS_FS_WRITE
 790         if (!(sb->s_flags & MS_RDONLY)) {
 791                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 792                 return -EROFS;
 793         }
 794 #endif
 795
 796         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 797         if (!sbi)
 798                 goto failed_nomem;
 799         sb->s_fs_info = sbi;
 800         sbi->sb = sb;
 801
 802         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 803
 804         mutex_init(&sbi->mutex);
 805         mutex_init(&sbi->s_lock);
 806         spin_lock_init(&sbi->work_lock);
 807         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
 808         /*
 809          * Set default mount options
 810          * Parse mount options
 811          */
 812         sbi->s_mount_opt = 0;
 813         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 814         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 815                 pr_err("wrong mount options\n");
 816                 goto failed;
 817         }
 818         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 819                 if (!silent)
 820                         pr_err("You didn't specify the type of your ufs filesystem\n\n"
 821                         "mount -t ufs -o ufstype="
 822                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 823                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 824                         "default is ufstype=old\n");
 825                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 826         }
 827
 828         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 829         sbi->s_uspi = uspi;
 830         if (!uspi)
 831                 goto failed;
 832         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 833         super_block_offset=UFS_SBLOCK;
 834
 835         /* Keep 2Gig file limit. Some UFS variants need to override
 836            this but as I don't know which I'll let those in the know loosen
 837            the rules */
 838         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 839         case UFS_MOUNT_UFSTYPE_44BSD:
 840                 UFSD("ufstype=44bsd\n");
 841                 uspi->s_fsize = block_size = 512;
 842                 uspi->s_fmask = ~(512 - 1);
 843                 uspi->s_fshift = 9;
 844                 uspi->s_sbsize = super_block_size = 1536;
 845                 uspi->s_sbbase = 0;
 846                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 847                 break;
 848         case UFS_MOUNT_UFSTYPE_UFS2:
 849                 UFSD("ufstype=ufs2\n");
 850                 super_block_offset=SBLOCK_UFS2;
 851                 uspi->s_fsize = block_size = 512;
 852                 uspi->s_fmask = ~(512 - 1);
 853                 uspi->s_fshift = 9;
 854                 uspi->s_sbsize = super_block_size = 1536;
 855                 uspi->s_sbbase =  0;
 856                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 857                 break;
 858
 859         case UFS_MOUNT_UFSTYPE_SUN:
 860                 UFSD("ufstype=sun\n");
 861                 uspi->s_fsize = block_size = 1024;
 862                 uspi->s_fmask = ~(1024 - 1);
 863                 uspi->s_fshift = 10;
 864                 uspi->s_sbsize = super_block_size = 2048;
 865                 uspi->s_sbbase = 0;
 866                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 867                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 868                 break;
 869
 870         case UFS_MOUNT_UFSTYPE_SUNOS:
 871                 UFSD("ufstype=sunos\n");
 872                 uspi->s_fsize = block_size = 1024;
 873                 uspi->s_fmask = ~(1024 - 1);
 874                 uspi->s_fshift = 10;
 875                 uspi->s_sbsize = 2048;
 876                 super_block_size = 2048;
 877                 uspi->s_sbbase = 0;
 878                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 879                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 880                 break;
 881
 882         case UFS_MOUNT_UFSTYPE_SUNx86:
 883                 UFSD("ufstype=sunx86\n");
 884                 uspi->s_fsize = block_size = 1024;
 885                 uspi->s_fmask = ~(1024 - 1);
 886                 uspi->s_fshift = 10;
 887                 uspi->s_sbsize = super_block_size = 2048;
 888                 uspi->s_sbbase = 0;
 889                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 890                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 891                 break;
 892
 893         case UFS_MOUNT_UFSTYPE_OLD:
 894                 UFSD("ufstype=old\n");
 895                 uspi->s_fsize = block_size = 1024;
 896                 uspi->s_fmask = ~(1024 - 1);
 897                 uspi->s_fshift = 10;
 898                 uspi->s_sbsize = super_block_size = 2048;
 899                 uspi->s_sbbase = 0;
 900                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 901                 if (!(sb->s_flags & MS_RDONLY)) {
 902                         if (!silent)
 903                                 pr_info("ufstype=old is supported read-only\n");
 904                         sb->s_flags |= MS_RDONLY;
 905                 }
 906                 break;
 907
 908         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 909                 UFSD("ufstype=nextstep\n");
 910                 uspi->s_fsize = block_size = 1024;
 911                 uspi->s_fmask = ~(1024 - 1);
 912                 uspi->s_fshift = 10;
 913                 uspi->s_sbsize = super_block_size = 2048;
 914                 uspi->s_sbbase = 0;
 915                 uspi->s_dirblksize = 1024;
 916                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 917                 if (!(sb->s_flags & MS_RDONLY)) {
 918                         if (!silent)
 919                                 pr_info("ufstype=nextstep is supported read-only\n");
 920                         sb->s_flags |= MS_RDONLY;
 921                 }
 922                 break;
 923
 924         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 925                 UFSD("ufstype=nextstep-cd\n");
 926                 uspi->s_fsize = block_size = 2048;
 927                 uspi->s_fmask = ~(2048 - 1);
 928                 uspi->s_fshift = 11;
 929                 uspi->s_sbsize = super_block_size = 2048;
 930                 uspi->s_sbbase = 0;
 931                 uspi->s_dirblksize = 1024;
 932                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 933                 if (!(sb->s_flags & MS_RDONLY)) {
 934                         if (!silent)
 935                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
 936                         sb->s_flags |= MS_RDONLY;
 937                 }
 938                 break;
 939
 940         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 941                 UFSD("ufstype=openstep\n");
 942                 uspi->s_fsize = block_size = 1024;
 943                 uspi->s_fmask = ~(1024 - 1);
 944                 uspi->s_fshift = 10;
 945                 uspi->s_sbsize = super_block_size = 2048;
 946                 uspi->s_sbbase = 0;
 947                 uspi->s_dirblksize = 1024;
 948                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 949                 if (!(sb->s_flags & MS_RDONLY)) {
 950                         if (!silent)
 951                                 pr_info("ufstype=openstep is supported read-only\n");
 952                         sb->s_flags |= MS_RDONLY;
 953                 }
 954                 break;
 955
 956         case UFS_MOUNT_UFSTYPE_HP:
 957                 UFSD("ufstype=hp\n");
 958                 uspi->s_fsize = block_size = 1024;
 959                 uspi->s_fmask = ~(1024 - 1);
 960                 uspi->s_fshift = 10;
 961                 uspi->s_sbsize = super_block_size = 2048;
 962                 uspi->s_sbbase = 0;
 963                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 964                 if (!(sb->s_flags & MS_RDONLY)) {
 965                         if (!silent)
 966                                 pr_info("ufstype=hp is supported read-only\n");
 967                         sb->s_flags |= MS_RDONLY;
 968                 }
 969                 break;
 970         default:
 971                 if (!silent)
 972                         pr_err("unknown ufstype\n");
 973                 goto failed;
 974         }
 975
 976 again:
 977         if (!sb_set_blocksize(sb, block_size)) {
 978                 pr_err("failed to set blocksize\n");
 979                 goto failed;
 980         }
 981
 982         /*
 983          * read ufs super block from device
 984          */
 985
 986         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 987
 988         if (!ubh)
 989             goto failed;
 990
 991         usb1 = ubh_get_usb_first(uspi);
 992         usb2 = ubh_get_usb_second(uspi);
 993         usb3 = ubh_get_usb_third(uspi);
 994
 995         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 996         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 997         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 998             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 999                 flags &= ~UFS_ST_MASK;
1000                 flags |=  UFS_ST_SUN;
1001         }
1002
1003         /*
1004          * Check ufs magic number
1005          */
1006         sbi->s_bytesex = BYTESEX_LE;
1007         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1008                 case UFS_MAGIC:
1009                 case UFS_MAGIC_BW:
1010                 case UFS2_MAGIC:
1011                 case UFS_MAGIC_LFN:
1012                 case UFS_MAGIC_FEA:
1013                 case UFS_MAGIC_4GB:
1014                         goto magic_found;
1015         }
1016         sbi->s_bytesex = BYTESEX_BE;
1017         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1018                 case UFS_MAGIC:
1019                 case UFS_MAGIC_BW:
1020                 case UFS2_MAGIC:
1021                 case UFS_MAGIC_LFN:
1022                 case UFS_MAGIC_FEA:
1023                 case UFS_MAGIC_4GB:
1024                         goto magic_found;
1025         }
1026
1027         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1028           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1029           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1030           && uspi->s_sbbase < 256) {
1031                 ubh_brelse_uspi(uspi);
1032                 ubh = NULL;
1033                 uspi->s_sbbase += 8;
1034                 goto again;
1035         }
1036         if (!silent)
1037                 pr_err("%s(): bad magic number\n", __func__);
1038         goto failed;
1039
1040 magic_found:
1041         /*
1042          * Check block and fragment sizes
1043          */
1044         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1045         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1046         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1047         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1048         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1049
1050         if (!is_power_of_2(uspi->s_fsize)) {
1051                 pr_err("%s(): fragment size %u is not a power of 2\n",
1052                        __func__, uspi->s_fsize);
1053                 goto failed;
1054         }
1055         if (uspi->s_fsize < 512) {
1056                 pr_err("%s(): fragment size %u is too small\n",
1057                        __func__, uspi->s_fsize);
1058                 goto failed;
1059         }
1060         if (uspi->s_fsize > 4096) {
1061                 pr_err("%s(): fragment size %u is too large\n",
1062                        __func__, uspi->s_fsize);
1063                 goto failed;
1064         }
1065         if (!is_power_of_2(uspi->s_bsize)) {
1066                 pr_err("%s(): block size %u is not a power of 2\n",
1067                        __func__, uspi->s_bsize);
1068                 goto failed;
1069         }
1070         if (uspi->s_bsize < 4096) {
1071                 pr_err("%s(): block size %u is too small\n",
1072                        __func__, uspi->s_bsize);
1073                 goto failed;
1074         }
1075         if (uspi->s_bsize / uspi->s_fsize > 8) {
1076                 pr_err("%s(): too many fragments per block (%u)\n",
1077                        __func__, uspi->s_bsize / uspi->s_fsize);
1078                 goto failed;
1079         }
1080         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1081                 ubh_brelse_uspi(uspi);
1082                 ubh = NULL;
1083                 block_size = uspi->s_fsize;
1084                 super_block_size = uspi->s_sbsize;
1085                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1086                 goto again;
1087         }
1088
1089         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1090         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1091
1092         /*
1093          * Check, if file system was correctly unmounted.
1094          * If not, make it read only.
1095          */
1096         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1097           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1098           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1099             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1100           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1101           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1102                 switch(usb1->fs_clean) {
1103                 case UFS_FSCLEAN:
1104                         UFSD("fs is clean\n");
1105                         break;
1106                 case UFS_FSSTABLE:
1107                         UFSD("fs is stable\n");
1108                         break;
1109                 case UFS_FSLOG:
1110                         UFSD("fs is logging fs\n");
1111                         break;
1112                 case UFS_FSOSF1:
1113                         UFSD("fs is DEC OSF/1\n");
1114                         break;
1115                 case UFS_FSACTIVE:
1116                         pr_err("%s(): fs is active\n", __func__);
1117                         sb->s_flags |= MS_RDONLY;
1118                         break;
1119                 case UFS_FSBAD:
1120                         pr_err("%s(): fs is bad\n", __func__);
1121                         sb->s_flags |= MS_RDONLY;
1122                         break;
1123                 default:
1124                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1125                                __func__, usb1->fs_clean);
1126                         sb->s_flags |= MS_RDONLY;
1127                         break;
1128                 }
1129         } else {
1130                 pr_err("%s(): fs needs fsck\n", __func__);
1131                 sb->s_flags |= MS_RDONLY;
1132         }
1133
1134         /*
1135          * Read ufs_super_block into internal data structures
1136          */
1137         sb->s_op = &ufs_super_ops;
1138         sb->s_export_op = &ufs_export_ops;
1139
1140         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1141
1142         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1143         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1144         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1145         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1146         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1147         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1148
1149         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1150                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1151                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1152         } else {
1153                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1154                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1155         }
1156
1157         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1158         /* s_bsize already set */
1159         /* s_fsize already set */
1160         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1161         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1162         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1163         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1164         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1165         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1166         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1167                 uspi->s_fshift);
1168         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1169         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1170         /* s_sbsize already set */
1171         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1172         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1173         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1174         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1175         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1176         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1177         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1178         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1179
1180         if (uspi->fs_magic == UFS2_MAGIC)
1181                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1182         else
1183                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1184
1185         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1186         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1187         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1188         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1189         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1190         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1191         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1192         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1193         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1194         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1195         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1196         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1197         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1198         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1199
1200         /*
1201          * Compute another frequently used values
1202          */
1203         uspi->s_fpbmask = uspi->s_fpb - 1;
1204         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1205                 uspi->s_apbshift = uspi->s_bshift - 3;
1206         else
1207                 uspi->s_apbshift = uspi->s_bshift - 2;
1208
1209         uspi->s_2apbshift = uspi->s_apbshift * 2;
1210         uspi->s_3apbshift = uspi->s_apbshift * 3;
1211         uspi->s_apb = 1 << uspi->s_apbshift;
1212         uspi->s_2apb = 1 << uspi->s_2apbshift;
1213         uspi->s_3apb = 1 << uspi->s_3apbshift;
1214         uspi->s_apbmask = uspi->s_apb - 1;
1215         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1216         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1217         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1218         uspi->s_bpf = uspi->s_fsize << 3;
1219         uspi->s_bpfshift = uspi->s_fshift + 3;
1220         uspi->s_bpfmask = uspi->s_bpf - 1;
1221         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1222             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1223                 uspi->s_maxsymlinklen =
1224                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1225
1226         if (uspi->fs_magic == UFS2_MAGIC)
1227                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1228         else
1229                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1230         if (uspi->s_maxsymlinklen > maxsymlen) {
1231                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1232                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1233                 uspi->s_maxsymlinklen = maxsymlen;
1234         }
1235         sb->s_max_links = UFS_LINK_MAX;
1236
1237         inode = ufs_iget(sb, UFS_ROOTINO);
1238         if (IS_ERR(inode)) {
1239                 ret = PTR_ERR(inode);
1240                 goto failed;
1241         }
1242         sb->s_root = d_make_root(inode);
1243         if (!sb->s_root) {
1244                 ret = -ENOMEM;
1245                 goto failed;
1246         }
1247
1248         ufs_setup_cstotal(sb);
1249         /*
1250          * Read cylinder group structures
1251          */
1252         if (!(sb->s_flags & MS_RDONLY))
1253                 if (!ufs_read_cylinder_structures(sb))
1254                         goto failed;
1255
1256         UFSD("EXIT\n");
1257         return 0;
1258
1259 failed:
1260         mutex_destroy(&sbi->mutex);
1261         if (ubh)
1262                 ubh_brelse_uspi (uspi);
1263         kfree (uspi);
1264         kfree(sbi);
1265         sb->s_fs_info = NULL;
1266         UFSD("EXIT (FAILED)\n");
1267         return ret;
1268
1269 failed_nomem:
1270         UFSD("EXIT (NOMEM)\n");
1271         return -ENOMEM;
1272 }
1273
1274 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1275 {
1276         struct ufs_sb_private_info * uspi;
1277         struct ufs_super_block_first * usb1;
1278         struct ufs_super_block_third * usb3;
1279         unsigned new_mount_opt, ufstype;
1280         unsigned flags;
1281
1282         sync_filesystem(sb);
1283         lock_ufs(sb);
1284         mutex_lock(&UFS_SB(sb)->s_lock);
1285         uspi = UFS_SB(sb)->s_uspi;
1286         flags = UFS_SB(sb)->s_flags;
1287         usb1 = ubh_get_usb_first(uspi);
1288         usb3 = ubh_get_usb_third(uspi);
1289
1290         /*
1291          * Allow the "check" option to be passed as a remount option.
1292          * It is not possible to change ufstype option during remount
1293          */
1294         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1295         new_mount_opt = 0;
1296         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1297         if (!ufs_parse_options (data, &new_mount_opt)) {
1298                 mutex_unlock(&UFS_SB(sb)->s_lock);
1299                 unlock_ufs(sb);
1300                 return -EINVAL;
1301         }
1302         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1303                 new_mount_opt |= ufstype;
1304         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1305                 pr_err("ufstype can't be changed during remount\n");
1306                 mutex_unlock(&UFS_SB(sb)->s_lock);
1307                 unlock_ufs(sb);
1308                 return -EINVAL;
1309         }
1310
1311         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1312                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1313                 mutex_unlock(&UFS_SB(sb)->s_lock);
1314                 unlock_ufs(sb);
1315                 return 0;
1316         }
1317
1318         /*
1319          * fs was mouted as rw, remounting ro
1320          */
1321         if (*mount_flags & MS_RDONLY) {
1322                 ufs_put_super_internal(sb);
1323                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1324                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1325                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1326                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1327                         ufs_set_fs_state(sb, usb1, usb3,
1328                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1329                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1330                 sb->s_flags |= MS_RDONLY;
1331         } else {
1332         /*
1333          * fs was mounted as ro, remounting rw
1334          */
1335 #ifndef CONFIG_UFS_FS_WRITE
1336                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1337                 mutex_unlock(&UFS_SB(sb)->s_lock);
1338                 unlock_ufs(sb);
1339                 return -EINVAL;
1340 #else
1341                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1342                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1343                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1344                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1345                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1346                         pr_err("this ufstype is read-only supported\n");
1347                         mutex_unlock(&UFS_SB(sb)->s_lock);
1348                         unlock_ufs(sb);
1349                         return -EINVAL;
1350                 }
1351                 if (!ufs_read_cylinder_structures(sb)) {
1352                         pr_err("failed during remounting\n");
1353                         mutex_unlock(&UFS_SB(sb)->s_lock);
1354                         unlock_ufs(sb);
1355                         return -EPERM;
1356                 }
1357                 sb->s_flags &= ~MS_RDONLY;
1358 #endif
1359         }
1360         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1361         mutex_unlock(&UFS_SB(sb)->s_lock);
1362         unlock_ufs(sb);
1363         return 0;
1364 }
1365
1366 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1367 {
1368         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1369         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1370         const struct match_token *tp = tokens;
1371
1372         while (tp->token != Opt_onerror_panic && tp->token != mval)
1373                 ++tp;
1374         BUG_ON(tp->token == Opt_onerror_panic);
1375         seq_printf(seq, ",%s", tp->pattern);
1376
1377         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1378         while (tp->token != Opt_err && tp->token != mval)
1379                 ++tp;
1380         BUG_ON(tp->token == Opt_err);
1381         seq_printf(seq, ",%s", tp->pattern);
1382
1383         return 0;
1384 }
1385
1386 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1387 {
1388         struct super_block *sb = dentry->d_sb;
1389         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1390         unsigned  flags = UFS_SB(sb)->s_flags;
1391         struct ufs_super_block_third *usb3;
1392         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1393
1394         lock_ufs(sb);
1395
1396         usb3 = ubh_get_usb_third(uspi);
1397
1398         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1399                 buf->f_type = UFS2_MAGIC;
1400                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1401         } else {
1402                 buf->f_type = UFS_MAGIC;
1403                 buf->f_blocks = uspi->s_dsize;
1404         }
1405         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1406                 uspi->cs_total.cs_nffree;
1407         buf->f_ffree = uspi->cs_total.cs_nifree;
1408         buf->f_bsize = sb->s_blocksize;
1409         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1410                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1411         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1412         buf->f_namelen = UFS_MAXNAMLEN;
1413         buf->f_fsid.val[0] = (u32)id;
1414         buf->f_fsid.val[1] = (u32)(id >> 32);
1415
1416         unlock_ufs(sb);
1417
1418         return 0;
1419 }
1420
1421 static struct kmem_cache * ufs_inode_cachep;
1422
1423 static struct inode *ufs_alloc_inode(struct super_block *sb)
1424 {
1425         struct ufs_inode_info *ei;
1426
1427         ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1428         if (!ei)
1429                 return NULL;
1430
1431         ei->vfs_inode.i_version = 1;
1432         return &ei->vfs_inode;
1433 }
1434
1435 static void ufs_i_callback(struct rcu_head *head)
1436 {
1437         struct inode *inode = container_of(head, struct inode, i_rcu);
1438         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1439 }
1440
1441 static void ufs_destroy_inode(struct inode *inode)
1442 {
1443         call_rcu(&inode->i_rcu, ufs_i_callback);
1444 }
1445
1446 static void init_once(void *foo)
1447 {
1448         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1449
1450         inode_init_once(&ei->vfs_inode);
1451 }
1452
1453 static int __init init_inodecache(void)
1454 {
1455         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1456                                              sizeof(struct ufs_inode_info),
1457                                              0, (SLAB_RECLAIM_ACCOUNT|
1458                                                 SLAB_MEM_SPREAD),
1459                                              init_once);
1460         if (ufs_inode_cachep == NULL)
1461                 return -ENOMEM;
1462         return 0;
1463 }
1464
1465 static void destroy_inodecache(void)
1466 {
1467         /*
1468          * Make sure all delayed rcu free inodes are flushed before we
1469          * destroy cache.
1470          */
1471         rcu_barrier();
1472         kmem_cache_destroy(ufs_inode_cachep);
1473 }
1474
1475 static const struct super_operations ufs_super_ops = {
1476         .alloc_inode    = ufs_alloc_inode,
1477         .destroy_inode  = ufs_destroy_inode,
1478         .write_inode    = ufs_write_inode,
1479         .evict_inode    = ufs_evict_inode,
1480         .put_super      = ufs_put_super,
1481         .sync_fs        = ufs_sync_fs,
1482         .statfs         = ufs_statfs,
1483         .remount_fs     = ufs_remount,
1484         .show_options   = ufs_show_options,
1485 };
1486
1487 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1488         int flags, const char *dev_name, void *data)
1489 {
1490         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1491 }
1492
1493 static struct file_system_type ufs_fs_type = {
1494         .owner          = THIS_MODULE,
1495         .name           = "ufs",
1496         .mount          = ufs_mount,
1497         .kill_sb        = kill_block_super,
1498         .fs_flags       = FS_REQUIRES_DEV,
1499 };
1500 MODULE_ALIAS_FS("ufs");
1501
1502 static int __init init_ufs_fs(void)
1503 {
1504         int err = init_inodecache();
1505         if (err)
1506                 goto out1;
1507         err = register_filesystem(&ufs_fs_type);
1508         if (err)
1509                 goto out;
1510         return 0;
1511 out:
1512         destroy_inodecache();
1513 out1:
1514         return err;
1515 }
1516
1517 static void __exit exit_ufs_fs(void)
1518 {
1519         unregister_filesystem(&ufs_fs_type);
1520         destroy_inodecache();
1521 }
1522
1523 module_init(init_ufs_fs)
1524 module_exit(exit_ufs_fs)
1525 MODULE_LICENSE("GPL");