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 <linux/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 #include <linux/iversion.h>
  92
  93 #include "ufs_fs.h"
  94 #include "ufs.h"
  95 #include "swab.h"
  96 #include "util.h"
  97
  98 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
  99 {
 100         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 101         struct inode *inode;
 102
 103         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 104                 return ERR_PTR(-ESTALE);
 105
 106         inode = ufs_iget(sb, ino);
 107         if (IS_ERR(inode))
 108                 return ERR_CAST(inode);
 109         if (generation && inode->i_generation != generation) {
 110                 iput(inode);
 111                 return ERR_PTR(-ESTALE);
 112         }
 113         return inode;
 114 }
 115
 116 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 117                                        int fh_len, int fh_type)
 118 {
 119         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 120 }
 121
 122 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 123                                        int fh_len, int fh_type)
 124 {
 125         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 126 }
 127
 128 static struct dentry *ufs_get_parent(struct dentry *child)
 129 {
 130         struct qstr dot_dot = QSTR_INIT("..", 2);
 131         ino_t ino;
 132
 133         ino = ufs_inode_by_name(d_inode(child), &dot_dot);
 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         .fh_to_dentry   = ufs_fh_to_dentry,
 141         .fh_to_parent   = ufs_fh_to_parent,
 142         .get_parent     = ufs_get_parent,
 143 };
 144
 145 #ifdef CONFIG_UFS_DEBUG
 146 /*
 147  * Print contents of ufs_super_block, useful for debugging
 148  */
 149 static void ufs_print_super_stuff(struct super_block *sb,
 150                                   struct ufs_super_block_first *usb1,
 151                                   struct ufs_super_block_second *usb2,
 152                                   struct ufs_super_block_third *usb3)
 153 {
 154         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 155
 156         pr_debug("ufs_print_super_stuff\n");
 157         pr_debug("  magic:     0x%x\n", magic);
 158         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 159                 pr_debug("  fs_size:   %llu\n", (unsigned long long)
 160                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 161                 pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
 162                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 163                 pr_debug("  bsize:         %u\n",
 164                          fs32_to_cpu(sb, usb1->fs_bsize));
 165                 pr_debug("  fsize:         %u\n",
 166                          fs32_to_cpu(sb, usb1->fs_fsize));
 167                 pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 168                 pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
 169                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 170                 pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 171                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 172                 pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
 173                          (unsigned long long)
 174                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 175                 pr_info("  cs_nifree(Num of free inodes): %llu\n",
 176                         (unsigned long long)
 177                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 178                 pr_info("  cs_nffree(Num of free frags): %llu\n",
 179                         (unsigned long long)
 180                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 181                 pr_info("  fs_maxsymlinklen: %u\n",
 182                         fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 183         } else {
 184                 pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 185                 pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 186                 pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 187                 pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 188                 pr_debug(" cgoffset:    %u\n",
 189                          fs32_to_cpu(sb, usb1->fs_cgoffset));
 190                 pr_debug(" ~cgmask:     0x%x\n",
 191                          ~fs32_to_cpu(sb, usb1->fs_cgmask));
 192                 pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 193                 pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 194                 pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 195                 pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 196                 pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 197                 pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 198                 pr_debug(" fragshift:   %u\n",
 199                          fs32_to_cpu(sb, usb1->fs_fragshift));
 200                 pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 201                 pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 202                 pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 203                 pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 204                 pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 205                 pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 206                 pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 207                 pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 208                 pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 209                 pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 210                 pr_debug(" fstodb:      %u\n",
 211                          fs32_to_cpu(sb, usb1->fs_fsbtodb));
 212                 pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 213                 pr_debug(" ndir         %u\n",
 214                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 215                 pr_debug(" nifree       %u\n",
 216                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 217                 pr_debug(" nbfree       %u\n",
 218                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 219                 pr_debug(" nffree       %u\n",
 220                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 221         }
 222         pr_debug("\n");
 223 }
 224
 225 /*
 226  * Print contents of ufs_cylinder_group, useful for debugging
 227  */
 228 static void ufs_print_cylinder_stuff(struct super_block *sb,
 229                                      struct ufs_cylinder_group *cg)
 230 {
 231         pr_debug("\nufs_print_cylinder_stuff\n");
 232         pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 233         pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 234         pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 235         pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 236         pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 237         pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 238         pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 239         pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 240         pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 241         pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 242         pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 243         pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 244         pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 245         pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 246         pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 247             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 248             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 249             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 250             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 251         pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 252         pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 253         pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 254         pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 255         pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 256         pr_debug("  clustersumoff %u\n",
 257                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 258         pr_debug("  clusteroff    %u\n",
 259                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 260         pr_debug("  nclusterblks  %u\n",
 261                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 262         pr_debug("\n");
 263 }
 264 #else
 265 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 266 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 267 #endif /* CONFIG_UFS_DEBUG */
 268
 269 static const struct super_operations ufs_super_ops;
 270
 271 void ufs_error (struct super_block * sb, const char * function,
 272         const char * fmt, ...)
 273 {
 274         struct ufs_sb_private_info * uspi;
 275         struct ufs_super_block_first * usb1;
 276         struct va_format vaf;
 277         va_list args;
 278
 279         uspi = UFS_SB(sb)->s_uspi;
 280         usb1 = ubh_get_usb_first(uspi);
 281
 282         if (!sb_rdonly(sb)) {
 283                 usb1->fs_clean = UFS_FSBAD;
 284                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 285                 ufs_mark_sb_dirty(sb);
 286                 sb->s_flags |= SB_RDONLY;
 287         }
 288         va_start(args, fmt);
 289         vaf.fmt = fmt;
 290         vaf.va = &args;
 291         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 292         case UFS_MOUNT_ONERROR_PANIC:
 293                 panic("panic (device %s): %s: %pV\n",
 294                       sb->s_id, function, &vaf);
 295
 296         case UFS_MOUNT_ONERROR_LOCK:
 297         case UFS_MOUNT_ONERROR_UMOUNT:
 298         case UFS_MOUNT_ONERROR_REPAIR:
 299                 pr_crit("error (device %s): %s: %pV\n",
 300                         sb->s_id, function, &vaf);
 301         }
 302         va_end(args);
 303 }
 304
 305 void ufs_panic (struct super_block * sb, const char * function,
 306         const char * fmt, ...)
 307 {
 308         struct ufs_sb_private_info * uspi;
 309         struct ufs_super_block_first * usb1;
 310         struct va_format vaf;
 311         va_list args;
 312
 313         uspi = UFS_SB(sb)->s_uspi;
 314         usb1 = ubh_get_usb_first(uspi);
 315
 316         if (!sb_rdonly(sb)) {
 317                 usb1->fs_clean = UFS_FSBAD;
 318                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 319                 ufs_mark_sb_dirty(sb);
 320         }
 321         va_start(args, fmt);
 322         vaf.fmt = fmt;
 323         vaf.va = &args;
 324         sb->s_flags |= SB_RDONLY;
 325         pr_crit("panic (device %s): %s: %pV\n",
 326                 sb->s_id, function, &vaf);
 327         va_end(args);
 328 }
 329
 330 void ufs_warning (struct super_block * sb, const char * function,
 331         const char * fmt, ...)
 332 {
 333         struct va_format vaf;
 334         va_list args;
 335
 336         va_start(args, fmt);
 337         vaf.fmt = fmt;
 338         vaf.va = &args;
 339         pr_warn("(device %s): %s: %pV\n",
 340                 sb->s_id, function, &vaf);
 341         va_end(args);
 342 }
 343
 344 enum {
 345        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 346        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 347        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 348        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 349        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 350        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 351        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 352        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 353        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 354        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 355        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 356        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 357        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 358        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 359        Opt_err
 360 };
 361
 362 static const match_table_t tokens = {
 363         {Opt_type_old, "ufstype=old"},
 364         {Opt_type_sunx86, "ufstype=sunx86"},
 365         {Opt_type_sun, "ufstype=sun"},
 366         {Opt_type_sunos, "ufstype=sunos"},
 367         {Opt_type_44bsd, "ufstype=44bsd"},
 368         {Opt_type_ufs2, "ufstype=ufs2"},
 369         {Opt_type_ufs2, "ufstype=5xbsd"},
 370         {Opt_type_hp, "ufstype=hp"},
 371         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 372         {Opt_type_nextstep, "ufstype=nextstep"},
 373         {Opt_type_openstep, "ufstype=openstep"},
 374 /*end of possible ufs types */
 375         {Opt_onerror_panic, "onerror=panic"},
 376         {Opt_onerror_lock, "onerror=lock"},
 377         {Opt_onerror_umount, "onerror=umount"},
 378         {Opt_onerror_repair, "onerror=repair"},
 379         {Opt_err, NULL}
 380 };
 381
 382 static int ufs_parse_options (char * options, unsigned * mount_options)
 383 {
 384         char * p;
 385
 386         UFSD("ENTER\n");
 387
 388         if (!options)
 389                 return 1;
 390
 391         while ((p = strsep(&options, ",")) != NULL) {
 392                 substring_t args[MAX_OPT_ARGS];
 393                 int token;
 394                 if (!*p)
 395                         continue;
 396
 397                 token = match_token(p, tokens, args);
 398                 switch (token) {
 399                 case Opt_type_old:
 400                         ufs_clear_opt (*mount_options, UFSTYPE);
 401                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 402                         break;
 403                 case Opt_type_sunx86:
 404                         ufs_clear_opt (*mount_options, UFSTYPE);
 405                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 406                         break;
 407                 case Opt_type_sun:
 408                         ufs_clear_opt (*mount_options, UFSTYPE);
 409                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 410                         break;
 411                 case Opt_type_sunos:
 412                         ufs_clear_opt(*mount_options, UFSTYPE);
 413                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 414                         break;
 415                 case Opt_type_44bsd:
 416                         ufs_clear_opt (*mount_options, UFSTYPE);
 417                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 418                         break;
 419                 case Opt_type_ufs2:
 420                         ufs_clear_opt(*mount_options, UFSTYPE);
 421                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 422                         break;
 423                 case Opt_type_hp:
 424                         ufs_clear_opt (*mount_options, UFSTYPE);
 425                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 426                         break;
 427                 case Opt_type_nextstepcd:
 428                         ufs_clear_opt (*mount_options, UFSTYPE);
 429                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 430                         break;
 431                 case Opt_type_nextstep:
 432                         ufs_clear_opt (*mount_options, UFSTYPE);
 433                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 434                         break;
 435                 case Opt_type_openstep:
 436                         ufs_clear_opt (*mount_options, UFSTYPE);
 437                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 438                         break;
 439                 case Opt_onerror_panic:
 440                         ufs_clear_opt (*mount_options, ONERROR);
 441                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 442                         break;
 443                 case Opt_onerror_lock:
 444                         ufs_clear_opt (*mount_options, ONERROR);
 445                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 446                         break;
 447                 case Opt_onerror_umount:
 448                         ufs_clear_opt (*mount_options, ONERROR);
 449                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 450                         break;
 451                 case Opt_onerror_repair:
 452                         pr_err("Unable to do repair on error, will lock lock instead\n");
 453                         ufs_clear_opt (*mount_options, ONERROR);
 454                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 455                         break;
 456                 default:
 457                         pr_err("Invalid option: \"%s\" or missing value\n", p);
 458                         return 0;
 459                 }
 460         }
 461         return 1;
 462 }
 463
 464 /*
 465  * Different types of UFS hold fs_cstotal in different
 466  * places, and use different data structure for it.
 467  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
 468  */
 469 static void ufs_setup_cstotal(struct super_block *sb)
 470 {
 471         struct ufs_sb_info *sbi = UFS_SB(sb);
 472         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 473         struct ufs_super_block_first *usb1;
 474         struct ufs_super_block_second *usb2;
 475         struct ufs_super_block_third *usb3;
 476         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 477
 478         UFSD("ENTER, mtype=%u\n", mtype);
 479         usb1 = ubh_get_usb_first(uspi);
 480         usb2 = ubh_get_usb_second(uspi);
 481         usb3 = ubh_get_usb_third(uspi);
 482
 483         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 484              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) ||
 485             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 486                 /*we have statistic in different place, then usual*/
 487                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 488                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 489                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 490                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 491         } else {
 492                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 493                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 494                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 495                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 496         }
 497         UFSD("EXIT\n");
 498 }
 499
 500 /*
 501  * Read on-disk structures associated with cylinder groups
 502  */
 503 static int ufs_read_cylinder_structures(struct super_block *sb)
 504 {
 505         struct ufs_sb_info *sbi = UFS_SB(sb);
 506         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 507         struct ufs_buffer_head * ubh;
 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 += uspi->s_fpb) {
 524                 size = uspi->s_bsize;
 525                 if (i + uspi->s_fpb > blks)
 526                         size = (blks - i) * uspi->s_fsize;
 527
 528                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 529
 530                 if (!ubh)
 531                         goto failed;
 532
 533                 ubh_ubhcpymem (space, ubh, size);
 534
 535                 space += size;
 536                 ubh_brelse (ubh);
 537                 ubh = NULL;
 538         }
 539
 540         /*
 541          * Read cylinder group (we read only first fragment from block
 542          * at this time) and prepare internal data structures for cg caching.
 543          */
 544         sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *),
 545                                    GFP_NOFS);
 546         if (!sbi->s_ucg)
 547                 goto failed;
 548         for (i = 0; i < uspi->s_ncg; i++)
 549                 sbi->s_ucg[i] = NULL;
 550         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 551                 sbi->s_ucpi[i] = NULL;
 552                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 553         }
 554         for (i = 0; i < uspi->s_ncg; i++) {
 555                 UFSD("read cg %u\n", i);
 556                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 557                         goto failed;
 558                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 559                         goto failed;
 560
 561                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 562         }
 563         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 564                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
 565                         goto failed;
 566                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 567         }
 568         sbi->s_cg_loaded = 0;
 569         UFSD("EXIT\n");
 570         return 1;
 571
 572 failed:
 573         kfree (base);
 574         if (sbi->s_ucg) {
 575                 for (i = 0; i < uspi->s_ncg; i++)
 576                         if (sbi->s_ucg[i])
 577                                 brelse (sbi->s_ucg[i]);
 578                 kfree (sbi->s_ucg);
 579                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 580                         kfree (sbi->s_ucpi[i]);
 581         }
 582         UFSD("EXIT (FAILED)\n");
 583         return 0;
 584 }
 585
 586 /*
 587  * Sync our internal copy of fs_cstotal with disk
 588  */
 589 static void ufs_put_cstotal(struct super_block *sb)
 590 {
 591         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 592         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 593         struct ufs_super_block_first *usb1;
 594         struct ufs_super_block_second *usb2;
 595         struct ufs_super_block_third *usb3;
 596
 597         UFSD("ENTER\n");
 598         usb1 = ubh_get_usb_first(uspi);
 599         usb2 = ubh_get_usb_second(uspi);
 600         usb3 = ubh_get_usb_third(uspi);
 601
 602         if (mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 603                 /*we have statistic in different place, then usual*/
 604                 usb2->fs_un.fs_u2.cs_ndir =
 605                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 606                 usb2->fs_un.fs_u2.cs_nbfree =
 607                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 608                 usb3->fs_un1.fs_u2.cs_nifree =
 609                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 610                 usb3->fs_un1.fs_u2.cs_nffree =
 611                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 612                 goto out;
 613         }
 614
 615         if (mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 616              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) {
 617                 /* store stats in both old and new places */
 618                 usb2->fs_un.fs_u2.cs_ndir =
 619                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 620                 usb2->fs_un.fs_u2.cs_nbfree =
 621                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 622                 usb3->fs_un1.fs_u2.cs_nifree =
 623                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 624                 usb3->fs_un1.fs_u2.cs_nffree =
 625                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 626         }
 627         usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 628         usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 629         usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 630         usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 631 out:
 632         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 633         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 634         UFSD("EXIT\n");
 635 }
 636
 637 /**
 638  * ufs_put_super_internal() - put on-disk intrenal structures
 639  * @sb: pointer to super_block structure
 640  * Put on-disk structures associated with cylinder groups
 641  * and write them back to disk, also update cs_total on disk
 642  */
 643 static void ufs_put_super_internal(struct super_block *sb)
 644 {
 645         struct ufs_sb_info *sbi = UFS_SB(sb);
 646         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 647         struct ufs_buffer_head * ubh;
 648         unsigned char * base, * space;
 649         unsigned blks, size, i;
 650
 651
 652         UFSD("ENTER\n");
 653
 654         ufs_put_cstotal(sb);
 655         size = uspi->s_cssize;
 656         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 657         base = space = (char*) sbi->s_csp;
 658         for (i = 0; i < blks; i += uspi->s_fpb) {
 659                 size = uspi->s_bsize;
 660                 if (i + uspi->s_fpb > blks)
 661                         size = (blks - i) * uspi->s_fsize;
 662
 663                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 664
 665                 ubh_memcpyubh (ubh, space, size);
 666                 space += size;
 667                 ubh_mark_buffer_uptodate (ubh, 1);
 668                 ubh_mark_buffer_dirty (ubh);
 669                 ubh_brelse (ubh);
 670         }
 671         for (i = 0; i < sbi->s_cg_loaded; i++) {
 672                 ufs_put_cylinder (sb, i);
 673                 kfree (sbi->s_ucpi[i]);
 674         }
 675         for (; i < UFS_MAX_GROUP_LOADED; i++)
 676                 kfree (sbi->s_ucpi[i]);
 677         for (i = 0; i < uspi->s_ncg; i++)
 678                 brelse (sbi->s_ucg[i]);
 679         kfree (sbi->s_ucg);
 680         kfree (base);
 681
 682         UFSD("EXIT\n");
 683 }
 684
 685 static int ufs_sync_fs(struct super_block *sb, int wait)
 686 {
 687         struct ufs_sb_private_info * uspi;
 688         struct ufs_super_block_first * usb1;
 689         struct ufs_super_block_third * usb3;
 690         unsigned flags;
 691
 692         mutex_lock(&UFS_SB(sb)->s_lock);
 693
 694         UFSD("ENTER\n");
 695
 696         flags = UFS_SB(sb)->s_flags;
 697         uspi = UFS_SB(sb)->s_uspi;
 698         usb1 = ubh_get_usb_first(uspi);
 699         usb3 = ubh_get_usb_third(uspi);
 700
 701         usb1->fs_time = ufs_get_seconds(sb);
 702         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
 703             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 704             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 705                 ufs_set_fs_state(sb, usb1, usb3,
 706                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 707         ufs_put_cstotal(sb);
 708
 709         UFSD("EXIT\n");
 710         mutex_unlock(&UFS_SB(sb)->s_lock);
 711
 712         return 0;
 713 }
 714
 715 static void delayed_sync_fs(struct work_struct *work)
 716 {
 717         struct ufs_sb_info *sbi;
 718
 719         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
 720
 721         spin_lock(&sbi->work_lock);
 722         sbi->work_queued = 0;
 723         spin_unlock(&sbi->work_lock);
 724
 725         ufs_sync_fs(sbi->sb, 1);
 726 }
 727
 728 void ufs_mark_sb_dirty(struct super_block *sb)
 729 {
 730         struct ufs_sb_info *sbi = UFS_SB(sb);
 731         unsigned long delay;
 732
 733         spin_lock(&sbi->work_lock);
 734         if (!sbi->work_queued) {
 735                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
 736                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
 737                 sbi->work_queued = 1;
 738         }
 739         spin_unlock(&sbi->work_lock);
 740 }
 741
 742 static void ufs_put_super(struct super_block *sb)
 743 {
 744         struct ufs_sb_info * sbi = UFS_SB(sb);
 745
 746         UFSD("ENTER\n");
 747
 748         if (!sb_rdonly(sb))
 749                 ufs_put_super_internal(sb);
 750         cancel_delayed_work_sync(&sbi->sync_work);
 751
 752         ubh_brelse_uspi (sbi->s_uspi);
 753         kfree (sbi->s_uspi);
 754         kfree (sbi);
 755         sb->s_fs_info = NULL;
 756         UFSD("EXIT\n");
 757         return;
 758 }
 759
 760 static u64 ufs_max_bytes(struct super_block *sb)
 761 {
 762         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 763         int bits = uspi->s_apbshift;
 764         u64 res;
 765
 766         if (bits > 21)
 767                 res = ~0ULL;
 768         else
 769                 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
 770                         (1LL << (3*bits));
 771
 772         if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
 773                 return MAX_LFS_FILESIZE;
 774         return res << uspi->s_bshift;
 775 }
 776
 777 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 778 {
 779         struct ufs_sb_info * sbi;
 780         struct ufs_sb_private_info * uspi;
 781         struct ufs_super_block_first * usb1;
 782         struct ufs_super_block_second * usb2;
 783         struct ufs_super_block_third * usb3;
 784         struct ufs_buffer_head * ubh;
 785         struct inode *inode;
 786         unsigned block_size, super_block_size;
 787         unsigned flags;
 788         unsigned super_block_offset;
 789         unsigned maxsymlen;
 790         int ret = -EINVAL;
 791
 792         uspi = NULL;
 793         ubh = NULL;
 794         flags = 0;
 795
 796         UFSD("ENTER\n");
 797
 798 #ifndef CONFIG_UFS_FS_WRITE
 799         if (!sb_rdonly(sb)) {
 800                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 801                 return -EROFS;
 802         }
 803 #endif
 804
 805         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 806         if (!sbi)
 807                 goto failed_nomem;
 808         sb->s_fs_info = sbi;
 809         sbi->sb = sb;
 810
 811         UFSD("flag %u\n", (int)(sb_rdonly(sb)));
 812
 813         mutex_init(&sbi->s_lock);
 814         spin_lock_init(&sbi->work_lock);
 815         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
 816         /*
 817          * Set default mount options
 818          * Parse mount options
 819          */
 820         sbi->s_mount_opt = 0;
 821         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 822         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 823                 pr_err("wrong mount options\n");
 824                 goto failed;
 825         }
 826         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 827                 if (!silent)
 828                         pr_err("You didn't specify the type of your ufs filesystem\n\n"
 829                         "mount -t ufs -o ufstype="
 830                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 831                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 832                         "default is ufstype=old\n");
 833                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 834         }
 835
 836         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 837         sbi->s_uspi = uspi;
 838         if (!uspi)
 839                 goto failed;
 840         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 841         super_block_offset=UFS_SBLOCK;
 842
 843         sb->s_maxbytes = MAX_LFS_FILESIZE;
 844
 845         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 846         case UFS_MOUNT_UFSTYPE_44BSD:
 847                 UFSD("ufstype=44bsd\n");
 848                 uspi->s_fsize = block_size = 512;
 849                 uspi->s_fmask = ~(512 - 1);
 850                 uspi->s_fshift = 9;
 851                 uspi->s_sbsize = super_block_size = 1536;
 852                 uspi->s_sbbase = 0;
 853                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 854                 break;
 855         case UFS_MOUNT_UFSTYPE_UFS2:
 856                 UFSD("ufstype=ufs2\n");
 857                 super_block_offset=SBLOCK_UFS2;
 858                 uspi->s_fsize = block_size = 512;
 859                 uspi->s_fmask = ~(512 - 1);
 860                 uspi->s_fshift = 9;
 861                 uspi->s_sbsize = super_block_size = 1536;
 862                 uspi->s_sbbase =  0;
 863                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 864                 break;
 865
 866         case UFS_MOUNT_UFSTYPE_SUN:
 867                 UFSD("ufstype=sun\n");
 868                 uspi->s_fsize = block_size = 1024;
 869                 uspi->s_fmask = ~(1024 - 1);
 870                 uspi->s_fshift = 10;
 871                 uspi->s_sbsize = super_block_size = 2048;
 872                 uspi->s_sbbase = 0;
 873                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 874                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 875                 break;
 876
 877         case UFS_MOUNT_UFSTYPE_SUNOS:
 878                 UFSD("ufstype=sunos\n");
 879                 uspi->s_fsize = block_size = 1024;
 880                 uspi->s_fmask = ~(1024 - 1);
 881                 uspi->s_fshift = 10;
 882                 uspi->s_sbsize = 2048;
 883                 super_block_size = 2048;
 884                 uspi->s_sbbase = 0;
 885                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 886                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 887                 break;
 888
 889         case UFS_MOUNT_UFSTYPE_SUNx86:
 890                 UFSD("ufstype=sunx86\n");
 891                 uspi->s_fsize = block_size = 1024;
 892                 uspi->s_fmask = ~(1024 - 1);
 893                 uspi->s_fshift = 10;
 894                 uspi->s_sbsize = super_block_size = 2048;
 895                 uspi->s_sbbase = 0;
 896                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 897                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 898                 break;
 899
 900         case UFS_MOUNT_UFSTYPE_OLD:
 901                 UFSD("ufstype=old\n");
 902                 uspi->s_fsize = block_size = 1024;
 903                 uspi->s_fmask = ~(1024 - 1);
 904                 uspi->s_fshift = 10;
 905                 uspi->s_sbsize = super_block_size = 2048;
 906                 uspi->s_sbbase = 0;
 907                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 908                 if (!sb_rdonly(sb)) {
 909                         if (!silent)
 910                                 pr_info("ufstype=old is supported read-only\n");
 911                         sb->s_flags |= SB_RDONLY;
 912                 }
 913                 break;
 914
 915         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 916                 UFSD("ufstype=nextstep\n");
 917                 uspi->s_fsize = block_size = 1024;
 918                 uspi->s_fmask = ~(1024 - 1);
 919                 uspi->s_fshift = 10;
 920                 uspi->s_sbsize = super_block_size = 2048;
 921                 uspi->s_sbbase = 0;
 922                 uspi->s_dirblksize = 1024;
 923                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 924                 if (!sb_rdonly(sb)) {
 925                         if (!silent)
 926                                 pr_info("ufstype=nextstep is supported read-only\n");
 927                         sb->s_flags |= SB_RDONLY;
 928                 }
 929                 break;
 930
 931         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 932                 UFSD("ufstype=nextstep-cd\n");
 933                 uspi->s_fsize = block_size = 2048;
 934                 uspi->s_fmask = ~(2048 - 1);
 935                 uspi->s_fshift = 11;
 936                 uspi->s_sbsize = super_block_size = 2048;
 937                 uspi->s_sbbase = 0;
 938                 uspi->s_dirblksize = 1024;
 939                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 940                 if (!sb_rdonly(sb)) {
 941                         if (!silent)
 942                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
 943                         sb->s_flags |= SB_RDONLY;
 944                 }
 945                 break;
 946
 947         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 948                 UFSD("ufstype=openstep\n");
 949                 uspi->s_fsize = block_size = 1024;
 950                 uspi->s_fmask = ~(1024 - 1);
 951                 uspi->s_fshift = 10;
 952                 uspi->s_sbsize = super_block_size = 2048;
 953                 uspi->s_sbbase = 0;
 954                 uspi->s_dirblksize = 1024;
 955                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 956                 if (!sb_rdonly(sb)) {
 957                         if (!silent)
 958                                 pr_info("ufstype=openstep is supported read-only\n");
 959                         sb->s_flags |= SB_RDONLY;
 960                 }
 961                 break;
 962
 963         case UFS_MOUNT_UFSTYPE_HP:
 964                 UFSD("ufstype=hp\n");
 965                 uspi->s_fsize = block_size = 1024;
 966                 uspi->s_fmask = ~(1024 - 1);
 967                 uspi->s_fshift = 10;
 968                 uspi->s_sbsize = super_block_size = 2048;
 969                 uspi->s_sbbase = 0;
 970                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 971                 if (!sb_rdonly(sb)) {
 972                         if (!silent)
 973                                 pr_info("ufstype=hp is supported read-only\n");
 974                         sb->s_flags |= SB_RDONLY;
 975                 }
 976                 break;
 977         default:
 978                 if (!silent)
 979                         pr_err("unknown ufstype\n");
 980                 goto failed;
 981         }
 982
 983 again:
 984         if (!sb_set_blocksize(sb, block_size)) {
 985                 pr_err("failed to set blocksize\n");
 986                 goto failed;
 987         }
 988
 989         /*
 990          * read ufs super block from device
 991          */
 992
 993         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 994
 995         if (!ubh)
 996             goto failed;
 997
 998         usb1 = ubh_get_usb_first(uspi);
 999         usb2 = ubh_get_usb_second(uspi);
1000         usb3 = ubh_get_usb_third(uspi);
1001
1002         /* Sort out mod used on SunOS 4.1.3 for fs_state */
1003         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1004         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1005             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1006                 flags &= ~UFS_ST_MASK;
1007                 flags |=  UFS_ST_SUN;
1008         }
1009
1010         if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1011             uspi->s_postblformat == UFS_42POSTBLFMT) {
1012                 if (!silent)
1013                         pr_err("this is not a 44bsd filesystem");
1014                 goto failed;
1015         }
1016
1017         /*
1018          * Check ufs magic number
1019          */
1020         sbi->s_bytesex = BYTESEX_LE;
1021         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1022                 case UFS_MAGIC:
1023                 case UFS_MAGIC_BW:
1024                 case UFS2_MAGIC:
1025                 case UFS_MAGIC_LFN:
1026                 case UFS_MAGIC_FEA:
1027                 case UFS_MAGIC_4GB:
1028                         goto magic_found;
1029         }
1030         sbi->s_bytesex = BYTESEX_BE;
1031         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1032                 case UFS_MAGIC:
1033                 case UFS_MAGIC_BW:
1034                 case UFS2_MAGIC:
1035                 case UFS_MAGIC_LFN:
1036                 case UFS_MAGIC_FEA:
1037                 case UFS_MAGIC_4GB:
1038                         goto magic_found;
1039         }
1040
1041         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1042           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1043           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1044           && uspi->s_sbbase < 256) {
1045                 ubh_brelse_uspi(uspi);
1046                 ubh = NULL;
1047                 uspi->s_sbbase += 8;
1048                 goto again;
1049         }
1050         if (!silent)
1051                 pr_err("%s(): bad magic number\n", __func__);
1052         goto failed;
1053
1054 magic_found:
1055         /*
1056          * Check block and fragment sizes
1057          */
1058         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1059         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1060         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1061         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1062         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1063
1064         if (!is_power_of_2(uspi->s_fsize)) {
1065                 pr_err("%s(): fragment size %u is not a power of 2\n",
1066                        __func__, uspi->s_fsize);
1067                 goto failed;
1068         }
1069         if (uspi->s_fsize < 512) {
1070                 pr_err("%s(): fragment size %u is too small\n",
1071                        __func__, uspi->s_fsize);
1072                 goto failed;
1073         }
1074         if (uspi->s_fsize > 4096) {
1075                 pr_err("%s(): fragment size %u is too large\n",
1076                        __func__, uspi->s_fsize);
1077                 goto failed;
1078         }
1079         if (!is_power_of_2(uspi->s_bsize)) {
1080                 pr_err("%s(): block size %u is not a power of 2\n",
1081                        __func__, uspi->s_bsize);
1082                 goto failed;
1083         }
1084         if (uspi->s_bsize < 4096) {
1085                 pr_err("%s(): block size %u is too small\n",
1086                        __func__, uspi->s_bsize);
1087                 goto failed;
1088         }
1089         if (uspi->s_bsize / uspi->s_fsize > 8) {
1090                 pr_err("%s(): too many fragments per block (%u)\n",
1091                        __func__, uspi->s_bsize / uspi->s_fsize);
1092                 goto failed;
1093         }
1094         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1095                 ubh_brelse_uspi(uspi);
1096                 ubh = NULL;
1097                 block_size = uspi->s_fsize;
1098                 super_block_size = uspi->s_sbsize;
1099                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1100                 goto again;
1101         }
1102
1103         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1104         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1105
1106         /*
1107          * Check, if file system was correctly unmounted.
1108          * If not, make it read only.
1109          */
1110         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1111           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1112           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1113             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1114           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1115           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1116                 switch(usb1->fs_clean) {
1117                 case UFS_FSCLEAN:
1118                         UFSD("fs is clean\n");
1119                         break;
1120                 case UFS_FSSTABLE:
1121                         UFSD("fs is stable\n");
1122                         break;
1123                 case UFS_FSLOG:
1124                         UFSD("fs is logging fs\n");
1125                         break;
1126                 case UFS_FSOSF1:
1127                         UFSD("fs is DEC OSF/1\n");
1128                         break;
1129                 case UFS_FSACTIVE:
1130                         pr_err("%s(): fs is active\n", __func__);
1131                         sb->s_flags |= SB_RDONLY;
1132                         break;
1133                 case UFS_FSBAD:
1134                         pr_err("%s(): fs is bad\n", __func__);
1135                         sb->s_flags |= SB_RDONLY;
1136                         break;
1137                 default:
1138                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1139                                __func__, usb1->fs_clean);
1140                         sb->s_flags |= SB_RDONLY;
1141                         break;
1142                 }
1143         } else {
1144                 pr_err("%s(): fs needs fsck\n", __func__);
1145                 sb->s_flags |= SB_RDONLY;
1146         }
1147
1148         /*
1149          * Read ufs_super_block into internal data structures
1150          */
1151         sb->s_op = &ufs_super_ops;
1152         sb->s_export_op = &ufs_export_ops;
1153
1154         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1155
1156         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1157         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1158         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1159         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1160         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1161         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1162
1163         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1164                 uspi->s_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1165                 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1166         } else {
1167                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1168                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1169         }
1170
1171         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1172         /* s_bsize already set */
1173         /* s_fsize already set */
1174         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1175         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1176         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1177         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1178         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1179         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1180         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1181                 uspi->s_fshift);
1182         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1183         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1184         /* s_sbsize already set */
1185         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1186         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1187         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1188         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1189         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1190         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1191         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1192         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1193
1194         if (uspi->fs_magic == UFS2_MAGIC)
1195                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1196         else
1197                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1198
1199         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1200         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1201         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1202         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1203         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1204         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1205         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1206         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1207         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1208         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1209         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1210         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1211         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1212         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1213
1214         uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1215                                               uspi->s_minfree, 100);
1216         if (uspi->s_minfree <= 5) {
1217                 uspi->s_time_to_space = ~0ULL;
1218                 uspi->s_space_to_time = 0;
1219                 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1220         } else {
1221                 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1222                 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1223                                               uspi->s_minfree - 2, 100) - 1;
1224         }
1225
1226         /*
1227          * Compute another frequently used values
1228          */
1229         uspi->s_fpbmask = uspi->s_fpb - 1;
1230         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1231                 uspi->s_apbshift = uspi->s_bshift - 3;
1232         else
1233                 uspi->s_apbshift = uspi->s_bshift - 2;
1234
1235         uspi->s_2apbshift = uspi->s_apbshift * 2;
1236         uspi->s_3apbshift = uspi->s_apbshift * 3;
1237         uspi->s_apb = 1 << uspi->s_apbshift;
1238         uspi->s_2apb = 1 << uspi->s_2apbshift;
1239         uspi->s_3apb = 1 << uspi->s_3apbshift;
1240         uspi->s_apbmask = uspi->s_apb - 1;
1241         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1242         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1243         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1244         uspi->s_bpf = uspi->s_fsize << 3;
1245         uspi->s_bpfshift = uspi->s_fshift + 3;
1246         uspi->s_bpfmask = uspi->s_bpf - 1;
1247         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1248             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1249                 uspi->s_maxsymlinklen =
1250                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1251
1252         if (uspi->fs_magic == UFS2_MAGIC)
1253                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1254         else
1255                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1256         if (uspi->s_maxsymlinklen > maxsymlen) {
1257                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1258                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1259                 uspi->s_maxsymlinklen = maxsymlen;
1260         }
1261         sb->s_maxbytes = ufs_max_bytes(sb);
1262         sb->s_max_links = UFS_LINK_MAX;
1263
1264         inode = ufs_iget(sb, UFS_ROOTINO);
1265         if (IS_ERR(inode)) {
1266                 ret = PTR_ERR(inode);
1267                 goto failed;
1268         }
1269         sb->s_root = d_make_root(inode);
1270         if (!sb->s_root) {
1271                 ret = -ENOMEM;
1272                 goto failed;
1273         }
1274
1275         ufs_setup_cstotal(sb);
1276         /*
1277          * Read cylinder group structures
1278          */
1279         if (!sb_rdonly(sb))
1280                 if (!ufs_read_cylinder_structures(sb))
1281                         goto failed;
1282
1283         UFSD("EXIT\n");
1284         return 0;
1285
1286 failed:
1287         if (ubh)
1288                 ubh_brelse_uspi (uspi);
1289         kfree (uspi);
1290         kfree(sbi);
1291         sb->s_fs_info = NULL;
1292         UFSD("EXIT (FAILED)\n");
1293         return ret;
1294
1295 failed_nomem:
1296         UFSD("EXIT (NOMEM)\n");
1297         return -ENOMEM;
1298 }
1299
1300 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1301 {
1302         struct ufs_sb_private_info * uspi;
1303         struct ufs_super_block_first * usb1;
1304         struct ufs_super_block_third * usb3;
1305         unsigned new_mount_opt, ufstype;
1306         unsigned flags;
1307
1308         sync_filesystem(sb);
1309         mutex_lock(&UFS_SB(sb)->s_lock);
1310         uspi = UFS_SB(sb)->s_uspi;
1311         flags = UFS_SB(sb)->s_flags;
1312         usb1 = ubh_get_usb_first(uspi);
1313         usb3 = ubh_get_usb_third(uspi);
1314
1315         /*
1316          * Allow the "check" option to be passed as a remount option.
1317          * It is not possible to change ufstype option during remount
1318          */
1319         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1320         new_mount_opt = 0;
1321         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1322         if (!ufs_parse_options (data, &new_mount_opt)) {
1323                 mutex_unlock(&UFS_SB(sb)->s_lock);
1324                 return -EINVAL;
1325         }
1326         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1327                 new_mount_opt |= ufstype;
1328         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1329                 pr_err("ufstype can't be changed during remount\n");
1330                 mutex_unlock(&UFS_SB(sb)->s_lock);
1331                 return -EINVAL;
1332         }
1333
1334         if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) {
1335                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1336                 mutex_unlock(&UFS_SB(sb)->s_lock);
1337                 return 0;
1338         }
1339
1340         /*
1341          * fs was mouted as rw, remounting ro
1342          */
1343         if (*mount_flags & SB_RDONLY) {
1344                 ufs_put_super_internal(sb);
1345                 usb1->fs_time = ufs_get_seconds(sb);
1346                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1347                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1348                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1349                         ufs_set_fs_state(sb, usb1, usb3,
1350                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1351                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1352                 sb->s_flags |= SB_RDONLY;
1353         } else {
1354         /*
1355          * fs was mounted as ro, remounting rw
1356          */
1357 #ifndef CONFIG_UFS_FS_WRITE
1358                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1359                 mutex_unlock(&UFS_SB(sb)->s_lock);
1360                 return -EINVAL;
1361 #else
1362                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1363                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1364                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1365                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1366                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1367                         pr_err("this ufstype is read-only supported\n");
1368                         mutex_unlock(&UFS_SB(sb)->s_lock);
1369                         return -EINVAL;
1370                 }
1371                 if (!ufs_read_cylinder_structures(sb)) {
1372                         pr_err("failed during remounting\n");
1373                         mutex_unlock(&UFS_SB(sb)->s_lock);
1374                         return -EPERM;
1375                 }
1376                 sb->s_flags &= ~SB_RDONLY;
1377 #endif
1378         }
1379         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1380         mutex_unlock(&UFS_SB(sb)->s_lock);
1381         return 0;
1382 }
1383
1384 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1385 {
1386         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1387         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1388         const struct match_token *tp = tokens;
1389
1390         while (tp->token != Opt_onerror_panic && tp->token != mval)
1391                 ++tp;
1392         BUG_ON(tp->token == Opt_onerror_panic);
1393         seq_printf(seq, ",%s", tp->pattern);
1394
1395         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1396         while (tp->token != Opt_err && tp->token != mval)
1397                 ++tp;
1398         BUG_ON(tp->token == Opt_err);
1399         seq_printf(seq, ",%s", tp->pattern);
1400
1401         return 0;
1402 }
1403
1404 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1405 {
1406         struct super_block *sb = dentry->d_sb;
1407         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1408         unsigned  flags = UFS_SB(sb)->s_flags;
1409         struct ufs_super_block_third *usb3;
1410         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1411
1412         mutex_lock(&UFS_SB(sb)->s_lock);
1413         usb3 = ubh_get_usb_third(uspi);
1414
1415         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1416                 buf->f_type = UFS2_MAGIC;
1417         else
1418                 buf->f_type = UFS_MAGIC;
1419
1420         buf->f_blocks = uspi->s_dsize;
1421         buf->f_bfree = ufs_freefrags(uspi);
1422         buf->f_ffree = uspi->cs_total.cs_nifree;
1423         buf->f_bsize = sb->s_blocksize;
1424         buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1425                 ? (buf->f_bfree - uspi->s_root_blocks) : 0;
1426         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1427         buf->f_namelen = UFS_MAXNAMLEN;
1428         buf->f_fsid.val[0] = (u32)id;
1429         buf->f_fsid.val[1] = (u32)(id >> 32);
1430
1431         mutex_unlock(&UFS_SB(sb)->s_lock);
1432
1433         return 0;
1434 }
1435
1436 static struct kmem_cache * ufs_inode_cachep;
1437
1438 static struct inode *ufs_alloc_inode(struct super_block *sb)
1439 {
1440         struct ufs_inode_info *ei;
1441
1442         ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1443         if (!ei)
1444                 return NULL;
1445
1446         inode_set_iversion(&ei->vfs_inode, 1);
1447         seqlock_init(&ei->meta_lock);
1448         mutex_init(&ei->truncate_mutex);
1449         return &ei->vfs_inode;
1450 }
1451
1452 static void ufs_free_in_core_inode(struct inode *inode)
1453 {
1454         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1455 }
1456
1457 static void init_once(void *foo)
1458 {
1459         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1460
1461         inode_init_once(&ei->vfs_inode);
1462 }
1463
1464 static int __init init_inodecache(void)
1465 {
1466         ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
1467                                 sizeof(struct ufs_inode_info), 0,
1468                                 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
1469                                         SLAB_ACCOUNT),
1470                                 offsetof(struct ufs_inode_info, i_u1.i_symlink),
1471                                 sizeof_field(struct ufs_inode_info,
1472                                         i_u1.i_symlink),
1473                                 init_once);
1474         if (ufs_inode_cachep == NULL)
1475                 return -ENOMEM;
1476         return 0;
1477 }
1478
1479 static void destroy_inodecache(void)
1480 {
1481         /*
1482          * Make sure all delayed rcu free inodes are flushed before we
1483          * destroy cache.
1484          */
1485         rcu_barrier();
1486         kmem_cache_destroy(ufs_inode_cachep);
1487 }
1488
1489 static const struct super_operations ufs_super_ops = {
1490         .alloc_inode    = ufs_alloc_inode,
1491         .free_inode     = ufs_free_in_core_inode,
1492         .write_inode    = ufs_write_inode,
1493         .evict_inode    = ufs_evict_inode,
1494         .put_super      = ufs_put_super,
1495         .sync_fs        = ufs_sync_fs,
1496         .statfs         = ufs_statfs,
1497         .remount_fs     = ufs_remount,
1498         .show_options   = ufs_show_options,
1499 };
1500
1501 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1502         int flags, const char *dev_name, void *data)
1503 {
1504         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1505 }
1506
1507 static struct file_system_type ufs_fs_type = {
1508         .owner          = THIS_MODULE,
1509         .name           = "ufs",
1510         .mount          = ufs_mount,
1511         .kill_sb        = kill_block_super,
1512         .fs_flags       = FS_REQUIRES_DEV,
1513 };
1514 MODULE_ALIAS_FS("ufs");
1515
1516 static int __init init_ufs_fs(void)
1517 {
1518         int err = init_inodecache();
1519         if (err)
1520                 goto out1;
1521         err = register_filesystem(&ufs_fs_type);
1522         if (err)
1523                 goto out;
1524         return 0;
1525 out:
1526         destroy_inodecache();
1527 out1:
1528         return err;
1529 }
1530
1531 static void __exit exit_ufs_fs(void)
1532 {
1533         unregister_filesystem(&ufs_fs_type);
1534         destroy_inodecache();
1535 }
1536
1537 module_init(init_ufs_fs)
1538 module_exit(exit_ufs_fs)
1539 MODULE_LICENSE("GPL");