fs/ufs/super.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  linux/fs/ufs/super.c
   4  *
   5  * Copyright (C) 1998
   6  * Daniel Pirkl <[email protected]>
   7  * Charles University, Faculty of Mathematics and Physics
   8  */
   9
  10 /* Derived from
  11  *
  12  *  linux/fs/ext2/super.c
  13  *
  14  * Copyright (C) 1992, 1993, 1994, 1995
  15  * Remy Card ([email protected])
  16  * Laboratoire MASI - Institut Blaise Pascal
  17  * Universite Pierre et Marie Curie (Paris VI)
  18  *
  19  *  from
  20  *
  21  *  linux/fs/minix/inode.c
  22  *
  23  *  Copyright (C) 1991, 1992  Linus Torvalds
  24  *
  25  *  Big-endian to little-endian byte-swapping/bitmaps by
  26  *        David S. Miller ([email protected]), 1995
  27  */
  28
  29 /*
  30  * Inspired by
  31  *
  32  *  linux/fs/ufs/super.c
  33  *
  34  * Copyright (C) 1996
  35  * Adrian Rodriguez ([email protected])
  36  * Laboratory for Computer Science Research Computing Facility
  37  * Rutgers, The State University of New Jersey
  38  *
  39  * Copyright (C) 1996  Eddie C. Dost  ([email protected])
  40  *
  41  * Kernel module support added on 96/04/26 by
  42  * Stefan Reinauer <[email protected]>
  43  *
  44  * Module usage counts added on 96/04/29 by
  45  * Gertjan van Wingerde <[email protected]>
  46  *
  47  * Clean swab support on 19970406 by
  48  * Francois-Rene Rideau <[email protected]>
  49  *
  50  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  51  * Niels Kristian Bech Jensen <[email protected]> partially based
  52  * on code by Martin von Loewis <[email protected]>.
  53  *
  54  * NeXTstep support added on February 5th 1998 by
  55  * Niels Kristian Bech Jensen <[email protected]>.
  56  *
  57  * write support Daniel Pirkl <[email protected]> 1998
  58  *
  59  * HP/UX hfs filesystem support added by
  60  * Martin K. Petersen <[email protected]>, August 1999
  61  *
  62  * UFS2 (of FreeBSD 5.x) support added by
  63  * Niraj Kumar <[email protected]>, Jan 2004
  64  *
  65  * UFS2 write support added by
  66  * Evgeniy Dushistov <[email protected]>, 2007
  67  */
  68
  69 #include <linux/exportfs.h>
  70 #include <linux/module.h>
  71 #include <linux/bitops.h>
  72
  73 #include <linux/stdarg.h>
  74
  75 #include <linux/uaccess.h>
  76
  77 #include <linux/errno.h>
  78 #include <linux/fs.h>
  79 #include <linux/slab.h>
  80 #include <linux/time.h>
  81 #include <linux/stat.h>
  82 #include <linux/string.h>
  83 #include <linux/blkdev.h>
  84 #include <linux/backing-dev.h>
  85 #include <linux/init.h>
  86 #include <linux/parser.h>
  87 #include <linux/buffer_head.h>
  88 #include <linux/vfs.h>
  89 #include <linux/log2.h>
  90 #include <linux/mount.h>
  91 #include <linux/seq_file.h>
  92 #include <linux/iversion.h>
  93
  94 #include "ufs_fs.h"
  95 #include "ufs.h"
  96 #include "swab.h"
  97 #include "util.h"
  98
  99 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 100 {
 101         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 102         struct inode *inode;
 103
 104         if (ino < UFS_ROOTINO || ino > (u64)uspi->s_ncg * uspi->s_ipg)
 105                 return ERR_PTR(-ESTALE);
 106
 107         inode = ufs_iget(sb, ino);
 108         if (IS_ERR(inode))
 109                 return ERR_CAST(inode);
 110         if (generation && inode->i_generation != generation) {
 111                 iput(inode);
 112                 return ERR_PTR(-ESTALE);
 113         }
 114         return inode;
 115 }
 116
 117 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 118                                        int fh_len, int fh_type)
 119 {
 120         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 121 }
 122
 123 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 124                                        int fh_len, int fh_type)
 125 {
 126         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 127 }
 128
 129 static struct dentry *ufs_get_parent(struct dentry *child)
 130 {
 131         ino_t ino;
 132
 133         ino = ufs_inode_by_name(d_inode(child), &dotdot_name);
 134         if (!ino)
 135                 return ERR_PTR(-ENOENT);
 136         return d_obtain_alias(ufs_iget(child->d_sb, ino));
 137 }
 138
 139 static const struct export_operations ufs_export_ops = {
 140         .encode_fh = generic_encode_ino32_fh,
 141         .fh_to_dentry   = ufs_fh_to_dentry,
 142         .fh_to_parent   = ufs_fh_to_parent,
 143         .get_parent     = ufs_get_parent,
 144 };
 145
 146 #ifdef CONFIG_UFS_DEBUG
 147 /*
 148  * Print contents of ufs_super_block, useful for debugging
 149  */
 150 static void ufs_print_super_stuff(struct super_block *sb,
 151                                   struct ufs_super_block_first *usb1,
 152                                   struct ufs_super_block_second *usb2,
 153                                   struct ufs_super_block_third *usb3)
 154 {
 155         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 156
 157         pr_debug("ufs_print_super_stuff\n");
 158         pr_debug("  magic:     0x%x\n", magic);
 159         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 160                 pr_debug("  fs_size:   %llu\n", (unsigned long long)
 161                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 162                 pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
 163                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 164                 pr_debug("  bsize:         %u\n",
 165                          fs32_to_cpu(sb, usb1->fs_bsize));
 166                 pr_debug("  fsize:         %u\n",
 167                          fs32_to_cpu(sb, usb1->fs_fsize));
 168                 pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 169                 pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
 170                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 171                 pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 172                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 173                 pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
 174                          (unsigned long long)
 175                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 176                 pr_info("  cs_nifree(Num of free inodes): %llu\n",
 177                         (unsigned long long)
 178                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 179                 pr_info("  cs_nffree(Num of free frags): %llu\n",
 180                         (unsigned long long)
 181                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 182                 pr_info("  fs_maxsymlinklen: %u\n",
 183                         fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 184         } else {
 185                 pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 186                 pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 187                 pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 188                 pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 189                 pr_debug(" cgoffset:    %u\n",
 190                          fs32_to_cpu(sb, usb1->fs_cgoffset));
 191                 pr_debug(" ~cgmask:     0x%x\n",
 192                          ~fs32_to_cpu(sb, usb1->fs_cgmask));
 193                 pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 194                 pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 195                 pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 196                 pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 197                 pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 198                 pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 199                 pr_debug(" fragshift:   %u\n",
 200                          fs32_to_cpu(sb, usb1->fs_fragshift));
 201                 pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 202                 pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 203                 pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 204                 pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 205                 pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 206                 pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 207                 pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 208                 pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 209                 pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 210                 pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 211                 pr_debug(" fstodb:      %u\n",
 212                          fs32_to_cpu(sb, usb1->fs_fsbtodb));
 213                 pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 214                 pr_debug(" ndir         %u\n",
 215                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 216                 pr_debug(" nifree       %u\n",
 217                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 218                 pr_debug(" nbfree       %u\n",
 219                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 220                 pr_debug(" nffree       %u\n",
 221                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 222         }
 223         pr_debug("\n");
 224 }
 225
 226 /*
 227  * Print contents of ufs_cylinder_group, useful for debugging
 228  */
 229 static void ufs_print_cylinder_stuff(struct super_block *sb,
 230                                      struct ufs_cylinder_group *cg)
 231 {
 232         pr_debug("\nufs_print_cylinder_stuff\n");
 233         pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 234         pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 235         pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 236         pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 237         pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 238         pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 239         pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 240         pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 241         pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 242         pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 243         pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 244         pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 245         pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 246         pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 247         pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 248             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 249             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 250             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 251             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 252         pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 253         pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 254         pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 255         pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 256         pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 257         pr_debug("  clustersumoff %u\n",
 258                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 259         pr_debug("  clusteroff    %u\n",
 260                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 261         pr_debug("  nclusterblks  %u\n",
 262                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 263         pr_debug("\n");
 264 }
 265 #else
 266 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 267 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 268 #endif /* CONFIG_UFS_DEBUG */
 269
 270 static const struct super_operations ufs_super_ops;
 271
 272 void ufs_error (struct super_block * sb, const char * function,
 273         const char * fmt, ...)
 274 {
 275         struct ufs_sb_private_info * uspi;
 276         struct ufs_super_block_first * usb1;
 277         struct va_format vaf;
 278         va_list args;
 279
 280         uspi = UFS_SB(sb)->s_uspi;
 281         usb1 = ubh_get_usb_first(uspi);
 282
 283         if (!sb_rdonly(sb)) {
 284                 usb1->fs_clean = UFS_FSBAD;
 285                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 286                 ufs_mark_sb_dirty(sb);
 287                 sb->s_flags |= SB_RDONLY;
 288         }
 289         va_start(args, fmt);
 290         vaf.fmt = fmt;
 291         vaf.va = &args;
 292         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 293         case UFS_MOUNT_ONERROR_PANIC:
 294                 panic("panic (device %s): %s: %pV\n",
 295                       sb->s_id, function, &vaf);
 296
 297         case UFS_MOUNT_ONERROR_LOCK:
 298         case UFS_MOUNT_ONERROR_UMOUNT:
 299         case UFS_MOUNT_ONERROR_REPAIR:
 300                 pr_crit("error (device %s): %s: %pV\n",
 301                         sb->s_id, function, &vaf);
 302         }
 303         va_end(args);
 304 }
 305
 306 void ufs_panic (struct super_block * sb, const char * function,
 307         const char * fmt, ...)
 308 {
 309         struct ufs_sb_private_info * uspi;
 310         struct ufs_super_block_first * usb1;
 311         struct va_format vaf;
 312         va_list args;
 313
 314         uspi = UFS_SB(sb)->s_uspi;
 315         usb1 = ubh_get_usb_first(uspi);
 316
 317         if (!sb_rdonly(sb)) {
 318                 usb1->fs_clean = UFS_FSBAD;
 319                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 320                 ufs_mark_sb_dirty(sb);
 321         }
 322         va_start(args, fmt);
 323         vaf.fmt = fmt;
 324         vaf.va = &args;
 325         sb->s_flags |= SB_RDONLY;
 326         pr_crit("panic (device %s): %s: %pV\n",
 327                 sb->s_id, function, &vaf);
 328         va_end(args);
 329 }
 330
 331 void ufs_warning (struct super_block * sb, const char * function,
 332         const char * fmt, ...)
 333 {
 334         struct va_format vaf;
 335         va_list args;
 336
 337         va_start(args, fmt);
 338         vaf.fmt = fmt;
 339         vaf.va = &args;
 340         pr_warn("(device %s): %s: %pV\n",
 341                 sb->s_id, function, &vaf);
 342         va_end(args);
 343 }
 344
 345 enum {
 346        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 347        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 348        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 349        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 350        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 351        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 352        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 353        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 354        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 355        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 356        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 357        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 358        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 359        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 360        Opt_err
 361 };
 362
 363 static const match_table_t tokens = {
 364         {Opt_type_old, "ufstype=old"},
 365         {Opt_type_sunx86, "ufstype=sunx86"},
 366         {Opt_type_sun, "ufstype=sun"},
 367         {Opt_type_sunos, "ufstype=sunos"},
 368         {Opt_type_44bsd, "ufstype=44bsd"},
 369         {Opt_type_ufs2, "ufstype=ufs2"},
 370         {Opt_type_ufs2, "ufstype=5xbsd"},
 371         {Opt_type_hp, "ufstype=hp"},
 372         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 373         {Opt_type_nextstep, "ufstype=nextstep"},
 374         {Opt_type_openstep, "ufstype=openstep"},
 375 /*end of possible ufs types */
 376         {Opt_onerror_panic, "onerror=panic"},
 377         {Opt_onerror_lock, "onerror=lock"},
 378         {Opt_onerror_umount, "onerror=umount"},
 379         {Opt_onerror_repair, "onerror=repair"},
 380         {Opt_err, NULL}
 381 };
 382
 383 static int ufs_parse_options (char * options, unsigned * mount_options)
 384 {
 385         char * p;
 386
 387         UFSD("ENTER\n");
 388
 389         if (!options)
 390                 return 1;
 391
 392         while ((p = strsep(&options, ",")) != NULL) {
 393                 substring_t args[MAX_OPT_ARGS];
 394                 int token;
 395                 if (!*p)
 396                         continue;
 397
 398                 token = match_token(p, tokens, args);
 399                 switch (token) {
 400                 case Opt_type_old:
 401                         ufs_clear_opt (*mount_options, UFSTYPE);
 402                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 403                         break;
 404                 case Opt_type_sunx86:
 405                         ufs_clear_opt (*mount_options, UFSTYPE);
 406                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 407                         break;
 408                 case Opt_type_sun:
 409                         ufs_clear_opt (*mount_options, UFSTYPE);
 410                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 411                         break;
 412                 case Opt_type_sunos:
 413                         ufs_clear_opt(*mount_options, UFSTYPE);
 414                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 415                         break;
 416                 case Opt_type_44bsd:
 417                         ufs_clear_opt (*mount_options, UFSTYPE);
 418                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 419                         break;
 420                 case Opt_type_ufs2:
 421                         ufs_clear_opt(*mount_options, UFSTYPE);
 422                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 423                         break;
 424                 case Opt_type_hp:
 425                         ufs_clear_opt (*mount_options, UFSTYPE);
 426                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 427                         break;
 428                 case Opt_type_nextstepcd:
 429                         ufs_clear_opt (*mount_options, UFSTYPE);
 430                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 431                         break;
 432                 case Opt_type_nextstep:
 433                         ufs_clear_opt (*mount_options, UFSTYPE);
 434                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 435                         break;
 436                 case Opt_type_openstep:
 437                         ufs_clear_opt (*mount_options, UFSTYPE);
 438                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 439                         break;
 440                 case Opt_onerror_panic:
 441                         ufs_clear_opt (*mount_options, ONERROR);
 442                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 443                         break;
 444                 case Opt_onerror_lock:
 445                         ufs_clear_opt (*mount_options, ONERROR);
 446                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 447                         break;
 448                 case Opt_onerror_umount:
 449                         ufs_clear_opt (*mount_options, ONERROR);
 450                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 451                         break;
 452                 case Opt_onerror_repair:
 453                         pr_err("Unable to do repair on error, will lock lock instead\n");
 454                         ufs_clear_opt (*mount_options, ONERROR);
 455                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 456                         break;
 457                 default:
 458                         pr_err("Invalid option: \"%s\" or missing value\n", p);
 459                         return 0;
 460                 }
 461         }
 462         return 1;
 463 }
 464
 465 /*
 466  * Different types of UFS hold fs_cstotal in different
 467  * places, and use different data structure for it.
 468  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
 469  */
 470 static void ufs_setup_cstotal(struct super_block *sb)
 471 {
 472         struct ufs_sb_info *sbi = UFS_SB(sb);
 473         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 474         struct ufs_super_block_first *usb1;
 475         struct ufs_super_block_second *usb2;
 476         struct ufs_super_block_third *usb3;
 477         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 478
 479         UFSD("ENTER, mtype=%u\n", mtype);
 480         usb1 = ubh_get_usb_first(uspi);
 481         usb2 = ubh_get_usb_second(uspi);
 482         usb3 = ubh_get_usb_third(uspi);
 483
 484         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 485              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) ||
 486             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 487                 /*we have statistic in different place, then usual*/
 488                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 489                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 490                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 491                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 492         } else {
 493                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 494                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 495                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 496                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 497         }
 498         UFSD("EXIT\n");
 499 }
 500
 501 /*
 502  * Read on-disk structures associated with cylinder groups
 503  */
 504 static int ufs_read_cylinder_structures(struct super_block *sb)
 505 {
 506         struct ufs_sb_info *sbi = UFS_SB(sb);
 507         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 508         unsigned char * base, * space;
 509         unsigned size, blks, i;
 510
 511         UFSD("ENTER\n");
 512
 513         /*
 514          * Read cs structures from (usually) first data block
 515          * on the device.
 516          */
 517         size = uspi->s_cssize;
 518         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 519         base = space = kmalloc(size, GFP_NOFS);
 520         if (!base)
 521                 goto failed;
 522         sbi->s_csp = (struct ufs_csum *)space;
 523         for (i = 0; i < blks; i++) {
 524                 struct buffer_head *bh = sb_bread(sb, uspi->s_csaddr + i);
 525                 if (!bh)
 526                         goto failed;
 527                 memcpy(space, bh->b_data, uspi->s_fsize);
 528                 space += uspi->s_fsize;
 529                 brelse (bh);
 530         }
 531
 532         /*
 533          * Read cylinder group (we read only first fragment from block
 534          * at this time) and prepare internal data structures for cg caching.
 535          */
 536         sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *),
 537                                    GFP_NOFS);
 538         if (!sbi->s_ucg)
 539                 goto failed;
 540         for (i = 0; i < uspi->s_ncg; i++)
 541                 sbi->s_ucg[i] = NULL;
 542         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 543                 sbi->s_ucpi[i] = NULL;
 544                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 545         }
 546         for (i = 0; i < uspi->s_ncg; i++) {
 547                 UFSD("read cg %u\n", i);
 548                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 549                         goto failed;
 550                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 551                         goto failed;
 552
 553                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 554         }
 555         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 556                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
 557                         goto failed;
 558                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 559         }
 560         sbi->s_cg_loaded = 0;
 561         UFSD("EXIT\n");
 562         return 1;
 563
 564 failed:
 565         kfree (base);
 566         if (sbi->s_ucg) {
 567                 for (i = 0; i < uspi->s_ncg; i++)
 568                         if (sbi->s_ucg[i])
 569                                 brelse (sbi->s_ucg[i]);
 570                 kfree (sbi->s_ucg);
 571                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 572                         kfree (sbi->s_ucpi[i]);
 573         }
 574         UFSD("EXIT (FAILED)\n");
 575         return 0;
 576 }
 577
 578 /*
 579  * Sync our internal copy of fs_cstotal with disk
 580  */
 581 static void ufs_put_cstotal(struct super_block *sb)
 582 {
 583         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 584         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 585         struct ufs_super_block_first *usb1;
 586         struct ufs_super_block_second *usb2;
 587         struct ufs_super_block_third *usb3;
 588
 589         UFSD("ENTER\n");
 590         usb1 = ubh_get_usb_first(uspi);
 591         usb2 = ubh_get_usb_second(uspi);
 592         usb3 = ubh_get_usb_third(uspi);
 593
 594         if (mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 595                 /*we have statistic in different place, then usual*/
 596                 usb2->fs_un.fs_u2.cs_ndir =
 597                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 598                 usb2->fs_un.fs_u2.cs_nbfree =
 599                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 600                 usb3->fs_un1.fs_u2.cs_nifree =
 601                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 602                 usb3->fs_un1.fs_u2.cs_nffree =
 603                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 604                 goto out;
 605         }
 606
 607         if (mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 608              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) {
 609                 /* store stats in both old and new places */
 610                 usb2->fs_un.fs_u2.cs_ndir =
 611                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 612                 usb2->fs_un.fs_u2.cs_nbfree =
 613                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 614                 usb3->fs_un1.fs_u2.cs_nifree =
 615                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 616                 usb3->fs_un1.fs_u2.cs_nffree =
 617                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 618         }
 619         usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 620         usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 621         usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 622         usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 623 out:
 624         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 625         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 626         UFSD("EXIT\n");
 627 }
 628
 629 /**
 630  * ufs_put_super_internal() - put on-disk intrenal structures
 631  * @sb: pointer to super_block structure
 632  * Put on-disk structures associated with cylinder groups
 633  * and write them back to disk, also update cs_total on disk
 634  */
 635 static void ufs_put_super_internal(struct super_block *sb)
 636 {
 637         struct ufs_sb_info *sbi = UFS_SB(sb);
 638         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 639         unsigned char * base, * space;
 640         unsigned blks, size, i;
 641
 642
 643         UFSD("ENTER\n");
 644
 645         ufs_put_cstotal(sb);
 646         size = uspi->s_cssize;
 647         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 648         base = space = (char*) sbi->s_csp;
 649         for (i = 0; i < blks; i++, space += uspi->s_fsize) {
 650                 struct buffer_head *bh = sb_bread(sb, uspi->s_csaddr + i);
 651
 652                 if (unlikely(!bh)) { // better than an oops...
 653                         ufs_panic(sb, __func__,
 654                                 "can't write part of cylinder group summary");
 655                         continue;
 656                 }
 657                 memcpy(bh->b_data, space, uspi->s_fsize);
 658                 mark_buffer_dirty(bh);
 659                 brelse(bh);
 660         }
 661         for (i = 0; i < sbi->s_cg_loaded; i++) {
 662                 ufs_put_cylinder (sb, i);
 663                 kfree (sbi->s_ucpi[i]);
 664         }
 665         for (; i < UFS_MAX_GROUP_LOADED; i++)
 666                 kfree (sbi->s_ucpi[i]);
 667         for (i = 0; i < uspi->s_ncg; i++)
 668                 brelse (sbi->s_ucg[i]);
 669         kfree (sbi->s_ucg);
 670         kfree (base);
 671
 672         UFSD("EXIT\n");
 673 }
 674
 675 static int ufs_sync_fs(struct super_block *sb, int wait)
 676 {
 677         struct ufs_sb_private_info * uspi;
 678         struct ufs_super_block_first * usb1;
 679         struct ufs_super_block_third * usb3;
 680         unsigned flags;
 681
 682         mutex_lock(&UFS_SB(sb)->s_lock);
 683
 684         UFSD("ENTER\n");
 685
 686         flags = UFS_SB(sb)->s_flags;
 687         uspi = UFS_SB(sb)->s_uspi;
 688         usb1 = ubh_get_usb_first(uspi);
 689         usb3 = ubh_get_usb_third(uspi);
 690
 691         usb1->fs_time = ufs_get_seconds(sb);
 692         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
 693             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 694             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 695                 ufs_set_fs_state(sb, usb1, usb3,
 696                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 697         ufs_put_cstotal(sb);
 698
 699         UFSD("EXIT\n");
 700         mutex_unlock(&UFS_SB(sb)->s_lock);
 701
 702         return 0;
 703 }
 704
 705 static void delayed_sync_fs(struct work_struct *work)
 706 {
 707         struct ufs_sb_info *sbi;
 708
 709         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
 710
 711         spin_lock(&sbi->work_lock);
 712         sbi->work_queued = 0;
 713         spin_unlock(&sbi->work_lock);
 714
 715         ufs_sync_fs(sbi->sb, 1);
 716 }
 717
 718 void ufs_mark_sb_dirty(struct super_block *sb)
 719 {
 720         struct ufs_sb_info *sbi = UFS_SB(sb);
 721         unsigned long delay;
 722
 723         spin_lock(&sbi->work_lock);
 724         if (!sbi->work_queued) {
 725                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
 726                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
 727                 sbi->work_queued = 1;
 728         }
 729         spin_unlock(&sbi->work_lock);
 730 }
 731
 732 static void ufs_put_super(struct super_block *sb)
 733 {
 734         struct ufs_sb_info * sbi = UFS_SB(sb);
 735
 736         UFSD("ENTER\n");
 737
 738         if (!sb_rdonly(sb))
 739                 ufs_put_super_internal(sb);
 740         cancel_delayed_work_sync(&sbi->sync_work);
 741
 742         ubh_brelse_uspi (sbi->s_uspi);
 743         kfree (sbi->s_uspi);
 744         kfree (sbi);
 745         sb->s_fs_info = NULL;
 746         UFSD("EXIT\n");
 747         return;
 748 }
 749
 750 static u64 ufs_max_bytes(struct super_block *sb)
 751 {
 752         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 753         int bits = uspi->s_apbshift;
 754         u64 res;
 755
 756         if (bits > 21)
 757                 res = ~0ULL;
 758         else
 759                 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
 760                         (1LL << (3*bits));
 761
 762         if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
 763                 return MAX_LFS_FILESIZE;
 764         return res << uspi->s_bshift;
 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_rdonly(sb)) {
 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_rdonly(sb)));
 802
 803         mutex_init(&sbi->s_lock);
 804         spin_lock_init(&sbi->work_lock);
 805         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
 806         /*
 807          * Set default mount options
 808          * Parse mount options
 809          */
 810         sbi->s_mount_opt = 0;
 811         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 812         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 813                 pr_err("wrong mount options\n");
 814                 goto failed;
 815         }
 816         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 817                 if (!silent)
 818                         pr_err("You didn't specify the type of your ufs filesystem\n\n"
 819                         "mount -t ufs -o ufstype="
 820                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 821                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 822                         "default is ufstype=old\n");
 823                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 824         }
 825
 826         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 827         sbi->s_uspi = uspi;
 828         if (!uspi)
 829                 goto failed;
 830         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 831         super_block_offset=UFS_SBLOCK;
 832
 833         sb->s_maxbytes = MAX_LFS_FILESIZE;
 834
 835         sb->s_time_gran = NSEC_PER_SEC;
 836         sb->s_time_min = S32_MIN;
 837         sb->s_time_max = S32_MAX;
 838
 839         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 840         case UFS_MOUNT_UFSTYPE_44BSD:
 841                 UFSD("ufstype=44bsd\n");
 842                 uspi->s_fsize = block_size = 512;
 843                 uspi->s_fmask = ~(512 - 1);
 844                 uspi->s_fshift = 9;
 845                 uspi->s_sbsize = super_block_size = 1536;
 846                 uspi->s_sbbase = 0;
 847                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 848                 break;
 849         case UFS_MOUNT_UFSTYPE_UFS2:
 850                 UFSD("ufstype=ufs2\n");
 851                 super_block_offset=SBLOCK_UFS2;
 852                 uspi->s_fsize = block_size = 512;
 853                 uspi->s_fmask = ~(512 - 1);
 854                 uspi->s_fshift = 9;
 855                 uspi->s_sbsize = super_block_size = 1536;
 856                 uspi->s_sbbase =  0;
 857                 sb->s_time_gran = 1;
 858                 sb->s_time_min = S64_MIN;
 859                 sb->s_time_max = S64_MAX;
 860                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 861                 break;
 862
 863         case UFS_MOUNT_UFSTYPE_SUN:
 864                 UFSD("ufstype=sun\n");
 865                 uspi->s_fsize = block_size = 1024;
 866                 uspi->s_fmask = ~(1024 - 1);
 867                 uspi->s_fshift = 10;
 868                 uspi->s_sbsize = super_block_size = 2048;
 869                 uspi->s_sbbase = 0;
 870                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 871                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 872                 break;
 873
 874         case UFS_MOUNT_UFSTYPE_SUNOS:
 875                 UFSD("ufstype=sunos\n");
 876                 uspi->s_fsize = block_size = 1024;
 877                 uspi->s_fmask = ~(1024 - 1);
 878                 uspi->s_fshift = 10;
 879                 uspi->s_sbsize = 2048;
 880                 super_block_size = 2048;
 881                 uspi->s_sbbase = 0;
 882                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 883                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 884                 break;
 885
 886         case UFS_MOUNT_UFSTYPE_SUNx86:
 887                 UFSD("ufstype=sunx86\n");
 888                 uspi->s_fsize = block_size = 1024;
 889                 uspi->s_fmask = ~(1024 - 1);
 890                 uspi->s_fshift = 10;
 891                 uspi->s_sbsize = super_block_size = 2048;
 892                 uspi->s_sbbase = 0;
 893                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 894                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 895                 break;
 896
 897         case UFS_MOUNT_UFSTYPE_OLD:
 898                 UFSD("ufstype=old\n");
 899                 uspi->s_fsize = block_size = 1024;
 900                 uspi->s_fmask = ~(1024 - 1);
 901                 uspi->s_fshift = 10;
 902                 uspi->s_sbsize = super_block_size = 2048;
 903                 uspi->s_sbbase = 0;
 904                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 905                 if (!sb_rdonly(sb)) {
 906                         if (!silent)
 907                                 pr_info("ufstype=old is supported read-only\n");
 908                         sb->s_flags |= SB_RDONLY;
 909                 }
 910                 break;
 911
 912         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 913                 UFSD("ufstype=nextstep\n");
 914                 uspi->s_fsize = block_size = 1024;
 915                 uspi->s_fmask = ~(1024 - 1);
 916                 uspi->s_fshift = 10;
 917                 uspi->s_sbsize = super_block_size = 2048;
 918                 uspi->s_sbbase = 0;
 919                 uspi->s_dirblksize = 1024;
 920                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 921                 if (!sb_rdonly(sb)) {
 922                         if (!silent)
 923                                 pr_info("ufstype=nextstep is supported read-only\n");
 924                         sb->s_flags |= SB_RDONLY;
 925                 }
 926                 break;
 927
 928         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 929                 UFSD("ufstype=nextstep-cd\n");
 930                 uspi->s_fsize = block_size = 2048;
 931                 uspi->s_fmask = ~(2048 - 1);
 932                 uspi->s_fshift = 11;
 933                 uspi->s_sbsize = super_block_size = 2048;
 934                 uspi->s_sbbase = 0;
 935                 uspi->s_dirblksize = 1024;
 936                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 937                 if (!sb_rdonly(sb)) {
 938                         if (!silent)
 939                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
 940                         sb->s_flags |= SB_RDONLY;
 941                 }
 942                 break;
 943
 944         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 945                 UFSD("ufstype=openstep\n");
 946                 uspi->s_fsize = block_size = 1024;
 947                 uspi->s_fmask = ~(1024 - 1);
 948                 uspi->s_fshift = 10;
 949                 uspi->s_sbsize = super_block_size = 2048;
 950                 uspi->s_sbbase = 0;
 951                 uspi->s_dirblksize = 1024;
 952                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 953                 if (!sb_rdonly(sb)) {
 954                         if (!silent)
 955                                 pr_info("ufstype=openstep is supported read-only\n");
 956                         sb->s_flags |= SB_RDONLY;
 957                 }
 958                 break;
 959
 960         case UFS_MOUNT_UFSTYPE_HP:
 961                 UFSD("ufstype=hp\n");
 962                 uspi->s_fsize = block_size = 1024;
 963                 uspi->s_fmask = ~(1024 - 1);
 964                 uspi->s_fshift = 10;
 965                 uspi->s_sbsize = super_block_size = 2048;
 966                 uspi->s_sbbase = 0;
 967                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 968                 if (!sb_rdonly(sb)) {
 969                         if (!silent)
 970                                 pr_info("ufstype=hp is supported read-only\n");
 971                         sb->s_flags |= SB_RDONLY;
 972                 }
 973                 break;
 974         default:
 975                 if (!silent)
 976                         pr_err("unknown ufstype\n");
 977                 goto failed;
 978         }
 979
 980 again:
 981         if (!sb_set_blocksize(sb, block_size)) {
 982                 pr_err("failed to set blocksize\n");
 983                 goto failed;
 984         }
 985
 986         /*
 987          * read ufs super block from device
 988          */
 989
 990         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 991
 992         if (!ubh)
 993             goto failed;
 994
 995         usb1 = ubh_get_usb_first(uspi);
 996         usb2 = ubh_get_usb_second(uspi);
 997         usb3 = ubh_get_usb_third(uspi);
 998
 999         /* Sort out mod used on SunOS 4.1.3 for fs_state */
1000         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1001         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1002             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1003                 flags &= ~UFS_ST_MASK;
1004                 flags |=  UFS_ST_SUN;
1005         }
1006
1007         if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1008             uspi->s_postblformat == UFS_42POSTBLFMT) {
1009                 if (!silent)
1010                         pr_err("this is not a 44bsd filesystem");
1011                 goto failed;
1012         }
1013
1014         /*
1015          * Check ufs magic number
1016          */
1017         sbi->s_bytesex = BYTESEX_LE;
1018         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1019                 case UFS_MAGIC:
1020                 case UFS_MAGIC_BW:
1021                 case UFS2_MAGIC:
1022                 case UFS_MAGIC_LFN:
1023                 case UFS_MAGIC_FEA:
1024                 case UFS_MAGIC_4GB:
1025                         goto magic_found;
1026         }
1027         sbi->s_bytesex = BYTESEX_BE;
1028         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1029                 case UFS_MAGIC:
1030                 case UFS_MAGIC_BW:
1031                 case UFS2_MAGIC:
1032                 case UFS_MAGIC_LFN:
1033                 case UFS_MAGIC_FEA:
1034                 case UFS_MAGIC_4GB:
1035                         goto magic_found;
1036         }
1037
1038         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1039           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1040           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1041           && uspi->s_sbbase < 256) {
1042                 ubh_brelse_uspi(uspi);
1043                 ubh = NULL;
1044                 uspi->s_sbbase += 8;
1045                 goto again;
1046         }
1047         if (!silent)
1048                 pr_err("%s(): bad magic number\n", __func__);
1049         goto failed;
1050
1051 magic_found:
1052         /*
1053          * Check block and fragment sizes
1054          */
1055         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1056         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1057         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1058         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1059         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1060
1061         if (!is_power_of_2(uspi->s_fsize)) {
1062                 pr_err("%s(): fragment size %u is not a power of 2\n",
1063                        __func__, uspi->s_fsize);
1064                 goto failed;
1065         }
1066         if (uspi->s_fsize < 512) {
1067                 pr_err("%s(): fragment size %u is too small\n",
1068                        __func__, uspi->s_fsize);
1069                 goto failed;
1070         }
1071         if (uspi->s_fsize > 4096) {
1072                 pr_err("%s(): fragment size %u is too large\n",
1073                        __func__, uspi->s_fsize);
1074                 goto failed;
1075         }
1076         if (!is_power_of_2(uspi->s_bsize)) {
1077                 pr_err("%s(): block size %u is not a power of 2\n",
1078                        __func__, uspi->s_bsize);
1079                 goto failed;
1080         }
1081         if (uspi->s_bsize < 4096) {
1082                 pr_err("%s(): block size %u is too small\n",
1083                        __func__, uspi->s_bsize);
1084                 goto failed;
1085         }
1086         if (uspi->s_bsize / uspi->s_fsize > 8) {
1087                 pr_err("%s(): too many fragments per block (%u)\n",
1088                        __func__, uspi->s_bsize / uspi->s_fsize);
1089                 goto failed;
1090         }
1091         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1092                 ubh_brelse_uspi(uspi);
1093                 ubh = NULL;
1094                 block_size = uspi->s_fsize;
1095                 super_block_size = uspi->s_sbsize;
1096                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1097                 goto again;
1098         }
1099
1100         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1101         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1102
1103         /*
1104          * Check, if file system was correctly unmounted.
1105          * If not, make it read only.
1106          */
1107         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1108           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1109           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1110             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1111           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1112           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1113                 switch(usb1->fs_clean) {
1114                 case UFS_FSCLEAN:
1115                         UFSD("fs is clean\n");
1116                         break;
1117                 case UFS_FSSTABLE:
1118                         UFSD("fs is stable\n");
1119                         break;
1120                 case UFS_FSLOG:
1121                         UFSD("fs is logging fs\n");
1122                         break;
1123                 case UFS_FSOSF1:
1124                         UFSD("fs is DEC OSF/1\n");
1125                         break;
1126                 case UFS_FSACTIVE:
1127                         pr_err("%s(): fs is active\n", __func__);
1128                         sb->s_flags |= SB_RDONLY;
1129                         break;
1130                 case UFS_FSBAD:
1131                         pr_err("%s(): fs is bad\n", __func__);
1132                         sb->s_flags |= SB_RDONLY;
1133                         break;
1134                 default:
1135                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1136                                __func__, usb1->fs_clean);
1137                         sb->s_flags |= SB_RDONLY;
1138                         break;
1139                 }
1140         } else {
1141                 pr_err("%s(): fs needs fsck\n", __func__);
1142                 sb->s_flags |= SB_RDONLY;
1143         }
1144
1145         /*
1146          * Read ufs_super_block into internal data structures
1147          */
1148         sb->s_op = &ufs_super_ops;
1149         sb->s_export_op = &ufs_export_ops;
1150
1151         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1152
1153         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1154         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1155         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1156         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1157         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1158         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1159
1160         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1161                 uspi->s_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1162                 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1163         } else {
1164                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1165                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1166         }
1167
1168         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1169         /* s_bsize already set */
1170         /* s_fsize already set */
1171         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1172         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1173         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1174         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1175         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1176         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1177         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1178                 uspi->s_fshift);
1179         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1180         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1181         /* s_sbsize already set */
1182         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1183         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1184         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1185         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1186         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1187         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1188         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1189         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1190
1191         if (uspi->fs_magic == UFS2_MAGIC)
1192                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1193         else
1194                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1195
1196         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1197         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1198         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1199         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1200         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1201         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1202         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1203         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1204         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1205         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1206         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1207         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1208         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1209         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1210
1211         uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1212                                               uspi->s_minfree, 100);
1213         if (uspi->s_minfree <= 5) {
1214                 uspi->s_time_to_space = ~0ULL;
1215                 uspi->s_space_to_time = 0;
1216                 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1217         } else {
1218                 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1219                 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1220                                               uspi->s_minfree - 2, 100) - 1;
1221         }
1222
1223         /*
1224          * Compute another frequently used values
1225          */
1226         uspi->s_fpbmask = uspi->s_fpb - 1;
1227         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1228                 uspi->s_apbshift = uspi->s_bshift - 3;
1229         else
1230                 uspi->s_apbshift = uspi->s_bshift - 2;
1231
1232         uspi->s_apb = 1 << uspi->s_apbshift;
1233         uspi->s_apbmask = uspi->s_apb - 1;
1234         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1235         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1236         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1237         uspi->s_bpf = uspi->s_fsize << 3;
1238         uspi->s_bpfshift = uspi->s_fshift + 3;
1239         uspi->s_bpfmask = uspi->s_bpf - 1;
1240         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1241             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1242                 uspi->s_maxsymlinklen =
1243                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1244
1245         if (uspi->fs_magic == UFS2_MAGIC)
1246                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1247         else
1248                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1249         if (uspi->s_maxsymlinklen > maxsymlen) {
1250                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1251                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1252                 uspi->s_maxsymlinklen = maxsymlen;
1253         }
1254         sb->s_maxbytes = ufs_max_bytes(sb);
1255         sb->s_max_links = UFS_LINK_MAX;
1256
1257         inode = ufs_iget(sb, UFS_ROOTINO);
1258         if (IS_ERR(inode)) {
1259                 ret = PTR_ERR(inode);
1260                 goto failed;
1261         }
1262         sb->s_root = d_make_root(inode);
1263         if (!sb->s_root) {
1264                 ret = -ENOMEM;
1265                 goto failed;
1266         }
1267
1268         ufs_setup_cstotal(sb);
1269         /*
1270          * Read cylinder group structures
1271          */
1272         if (!sb_rdonly(sb))
1273                 if (!ufs_read_cylinder_structures(sb))
1274                         goto failed;
1275
1276         UFSD("EXIT\n");
1277         return 0;
1278
1279 failed:
1280         if (ubh)
1281                 ubh_brelse_uspi (uspi);
1282         kfree (uspi);
1283         kfree(sbi);
1284         sb->s_fs_info = NULL;
1285         UFSD("EXIT (FAILED)\n");
1286         return ret;
1287
1288 failed_nomem:
1289         UFSD("EXIT (NOMEM)\n");
1290         return -ENOMEM;
1291 }
1292
1293 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1294 {
1295         struct ufs_sb_private_info * uspi;
1296         struct ufs_super_block_first * usb1;
1297         struct ufs_super_block_third * usb3;
1298         unsigned new_mount_opt, ufstype;
1299         unsigned flags;
1300
1301         sync_filesystem(sb);
1302         mutex_lock(&UFS_SB(sb)->s_lock);
1303         uspi = UFS_SB(sb)->s_uspi;
1304         flags = UFS_SB(sb)->s_flags;
1305         usb1 = ubh_get_usb_first(uspi);
1306         usb3 = ubh_get_usb_third(uspi);
1307
1308         /*
1309          * Allow the "check" option to be passed as a remount option.
1310          * It is not possible to change ufstype option during remount
1311          */
1312         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1313         new_mount_opt = 0;
1314         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1315         if (!ufs_parse_options (data, &new_mount_opt)) {
1316                 mutex_unlock(&UFS_SB(sb)->s_lock);
1317                 return -EINVAL;
1318         }
1319         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1320                 new_mount_opt |= ufstype;
1321         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1322                 pr_err("ufstype can't be changed during remount\n");
1323                 mutex_unlock(&UFS_SB(sb)->s_lock);
1324                 return -EINVAL;
1325         }
1326
1327         if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) {
1328                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1329                 mutex_unlock(&UFS_SB(sb)->s_lock);
1330                 return 0;
1331         }
1332
1333         /*
1334          * fs was mouted as rw, remounting ro
1335          */
1336         if (*mount_flags & SB_RDONLY) {
1337                 ufs_put_super_internal(sb);
1338                 usb1->fs_time = ufs_get_seconds(sb);
1339                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1340                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1341                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1342                         ufs_set_fs_state(sb, usb1, usb3,
1343                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1344                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1345                 sb->s_flags |= SB_RDONLY;
1346         } else {
1347         /*
1348          * fs was mounted as ro, remounting rw
1349          */
1350 #ifndef CONFIG_UFS_FS_WRITE
1351                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1352                 mutex_unlock(&UFS_SB(sb)->s_lock);
1353                 return -EINVAL;
1354 #else
1355                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1356                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1357                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1358                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1359                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1360                         pr_err("this ufstype is read-only supported\n");
1361                         mutex_unlock(&UFS_SB(sb)->s_lock);
1362                         return -EINVAL;
1363                 }
1364                 if (!ufs_read_cylinder_structures(sb)) {
1365                         pr_err("failed during remounting\n");
1366                         mutex_unlock(&UFS_SB(sb)->s_lock);
1367                         return -EPERM;
1368                 }
1369                 sb->s_flags &= ~SB_RDONLY;
1370 #endif
1371         }
1372         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1373         mutex_unlock(&UFS_SB(sb)->s_lock);
1374         return 0;
1375 }
1376
1377 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1378 {
1379         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1380         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1381         const struct match_token *tp = tokens;
1382
1383         while (tp->token != Opt_onerror_panic && tp->token != mval)
1384                 ++tp;
1385         BUG_ON(tp->token == Opt_onerror_panic);
1386         seq_printf(seq, ",%s", tp->pattern);
1387
1388         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1389         while (tp->token != Opt_err && tp->token != mval)
1390                 ++tp;
1391         BUG_ON(tp->token == Opt_err);
1392         seq_printf(seq, ",%s", tp->pattern);
1393
1394         return 0;
1395 }
1396
1397 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1398 {
1399         struct super_block *sb = dentry->d_sb;
1400         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1401         unsigned  flags = UFS_SB(sb)->s_flags;
1402         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1403
1404         mutex_lock(&UFS_SB(sb)->s_lock);
1405
1406         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1407                 buf->f_type = UFS2_MAGIC;
1408         else
1409                 buf->f_type = UFS_MAGIC;
1410
1411         buf->f_blocks = uspi->s_dsize;
1412         buf->f_bfree = ufs_freefrags(uspi);
1413         buf->f_ffree = uspi->cs_total.cs_nifree;
1414         buf->f_bsize = sb->s_blocksize;
1415         buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1416                 ? (buf->f_bfree - uspi->s_root_blocks) : 0;
1417         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1418         buf->f_namelen = UFS_MAXNAMLEN;
1419         buf->f_fsid = u64_to_fsid(id);
1420
1421         mutex_unlock(&UFS_SB(sb)->s_lock);
1422
1423         return 0;
1424 }
1425
1426 static struct kmem_cache * ufs_inode_cachep;
1427
1428 static struct inode *ufs_alloc_inode(struct super_block *sb)
1429 {
1430         struct ufs_inode_info *ei;
1431
1432         ei = alloc_inode_sb(sb, ufs_inode_cachep, GFP_NOFS);
1433         if (!ei)
1434                 return NULL;
1435
1436         inode_set_iversion(&ei->vfs_inode, 1);
1437         seqlock_init(&ei->meta_lock);
1438         mutex_init(&ei->truncate_mutex);
1439         return &ei->vfs_inode;
1440 }
1441
1442 static void ufs_free_in_core_inode(struct inode *inode)
1443 {
1444         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1445 }
1446
1447 static void init_once(void *foo)
1448 {
1449         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1450
1451         inode_init_once(&ei->vfs_inode);
1452 }
1453
1454 static int __init init_inodecache(void)
1455 {
1456         ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
1457                                 sizeof(struct ufs_inode_info), 0,
1458                                 (SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT),
1459                                 offsetof(struct ufs_inode_info, i_u1.i_symlink),
1460                                 sizeof_field(struct ufs_inode_info,
1461                                         i_u1.i_symlink),
1462                                 init_once);
1463         if (ufs_inode_cachep == NULL)
1464                 return -ENOMEM;
1465         return 0;
1466 }
1467
1468 static void destroy_inodecache(void)
1469 {
1470         /*
1471          * Make sure all delayed rcu free inodes are flushed before we
1472          * destroy cache.
1473          */
1474         rcu_barrier();
1475         kmem_cache_destroy(ufs_inode_cachep);
1476 }
1477
1478 static const struct super_operations ufs_super_ops = {
1479         .alloc_inode    = ufs_alloc_inode,
1480         .free_inode     = ufs_free_in_core_inode,
1481         .write_inode    = ufs_write_inode,
1482         .evict_inode    = ufs_evict_inode,
1483         .put_super      = ufs_put_super,
1484         .sync_fs        = ufs_sync_fs,
1485         .statfs         = ufs_statfs,
1486         .remount_fs     = ufs_remount,
1487         .show_options   = ufs_show_options,
1488 };
1489
1490 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1491         int flags, const char *dev_name, void *data)
1492 {
1493         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1494 }
1495
1496 static struct file_system_type ufs_fs_type = {
1497         .owner          = THIS_MODULE,
1498         .name           = "ufs",
1499         .mount          = ufs_mount,
1500         .kill_sb        = kill_block_super,
1501         .fs_flags       = FS_REQUIRES_DEV,
1502 };
1503 MODULE_ALIAS_FS("ufs");
1504
1505 static int __init init_ufs_fs(void)
1506 {
1507         int err = init_inodecache();
1508         if (err)
1509                 goto out1;
1510         err = register_filesystem(&ufs_fs_type);
1511         if (err)
1512                 goto out;
1513         return 0;
1514 out:
1515         destroy_inodecache();
1516 out1:
1517         return err;
1518 }
1519
1520 static void __exit exit_ufs_fs(void)
1521 {
1522         unregister_filesystem(&ufs_fs_type);
1523         destroy_inodecache();
1524 }
1525
1526 module_init(init_ufs_fs)
1527 module_exit(exit_ufs_fs)
1528 MODULE_DESCRIPTION("UFS Filesystem");
1529 MODULE_LICENSE("GPL");