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
  69 #include <linux/exportfs.h>
  70 #include <linux/module.h>
  71 #include <linux/bitops.h>
  72
  73 #include <stdarg.h>
  74
  75 #include <asm/uaccess.h>
  76 #include <asm/system.h>
  77
  78 #include <linux/errno.h>
  79 #include <linux/fs.h>
  80 #include <linux/slab.h>
  81 #include <linux/time.h>
  82 #include <linux/stat.h>
  83 #include <linux/string.h>
  84 #include <linux/blkdev.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
  93 #include "ufs_fs.h"
  94 #include "ufs.h"
  95 #include "swab.h"
  96 #include "util.h"
  97
  98 void lock_ufs(struct super_block *sb)
  99 {
 100 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
 101         struct ufs_sb_info *sbi = UFS_SB(sb);
 102
 103         mutex_lock(&sbi->mutex);
 104         sbi->mutex_owner = current;
 105 #endif
 106 }
 107
 108 void unlock_ufs(struct super_block *sb)
 109 {
 110 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
 111         struct ufs_sb_info *sbi = UFS_SB(sb);
 112
 113         sbi->mutex_owner = NULL;
 114         mutex_unlock(&sbi->mutex);
 115 #endif
 116 }
 117
 118 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 119 {
 120         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 121         struct inode *inode;
 122
 123         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 124                 return ERR_PTR(-ESTALE);
 125
 126         inode = ufs_iget(sb, ino);
 127         if (IS_ERR(inode))
 128                 return ERR_CAST(inode);
 129         if (generation && inode->i_generation != generation) {
 130                 iput(inode);
 131                 return ERR_PTR(-ESTALE);
 132         }
 133         return inode;
 134 }
 135
 136 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 137                                        int fh_len, int fh_type)
 138 {
 139         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 140 }
 141
 142 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 143                                        int fh_len, int fh_type)
 144 {
 145         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 146 }
 147
 148 static struct dentry *ufs_get_parent(struct dentry *child)
 149 {
 150         struct qstr dot_dot = {
 151                 .name   = "..",
 152                 .len    = 2,
 153         };
 154         ino_t ino;
 155
 156         ino = ufs_inode_by_name(child->d_inode, &dot_dot);
 157         if (!ino)
 158                 return ERR_PTR(-ENOENT);
 159         return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
 160 }
 161
 162 static const struct export_operations ufs_export_ops = {
 163         .fh_to_dentry   = ufs_fh_to_dentry,
 164         .fh_to_parent   = ufs_fh_to_parent,
 165         .get_parent     = ufs_get_parent,
 166 };
 167
 168 #ifdef CONFIG_UFS_DEBUG
 169 /*
 170  * Print contents of ufs_super_block, useful for debugging
 171  */
 172 static void ufs_print_super_stuff(struct super_block *sb,
 173                                   struct ufs_super_block_first *usb1,
 174                                   struct ufs_super_block_second *usb2,
 175                                   struct ufs_super_block_third *usb3)
 176 {
 177         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 178
 179         printk("ufs_print_super_stuff\n");
 180         printk("  magic:     0x%x\n", magic);
 181         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 182                 printk("  fs_size:   %llu\n", (unsigned long long)
 183                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 184                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 185                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 186                 printk("  bsize:         %u\n",
 187                        fs32_to_cpu(sb, usb1->fs_bsize));
 188                 printk("  fsize:         %u\n",
 189                        fs32_to_cpu(sb, usb1->fs_fsize));
 190                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 191                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 192                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 193                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 194                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 195                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 196                        (unsigned long long)
 197                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 198                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 199                        (unsigned long long)
 200                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 201                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 202                        (unsigned long long)
 203                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 204                 printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
 205                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 206         } else {
 207                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 208                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 209                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 210                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 211                 printk(" cgoffset:    %u\n",
 212                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 213                 printk(" ~cgmask:     0x%x\n",
 214                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 215                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 216                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 217                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 218                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 219                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 220                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 221                 printk(" fragshift:   %u\n",
 222                        fs32_to_cpu(sb, usb1->fs_fragshift));
 223                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 224                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 225                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 226                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 227                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 228                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 229                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 230                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 231                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 232                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 233                 printk(" fstodb:      %u\n",
 234                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 235                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 236                 printk(" ndir         %u\n",
 237                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 238                 printk(" nifree       %u\n",
 239                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 240                 printk(" nbfree       %u\n",
 241                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 242                 printk(" nffree       %u\n",
 243                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 244         }
 245         printk("\n");
 246 }
 247
 248 /*
 249  * Print contents of ufs_cylinder_group, useful for debugging
 250  */
 251 static void ufs_print_cylinder_stuff(struct super_block *sb,
 252                                      struct ufs_cylinder_group *cg)
 253 {
 254         printk("\nufs_print_cylinder_stuff\n");
 255         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 256         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 257         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 258         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 259         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 260         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 261         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 262         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 263         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 264         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 265         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 266         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 267         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 268         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 269         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 270             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 271             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 272             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 273             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 274         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 275         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 276         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 277         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 278         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 279         printk("  clustersumoff %u\n",
 280                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 281         printk("  clusteroff    %u\n",
 282                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 283         printk("  nclusterblks  %u\n",
 284                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 285         printk("\n");
 286 }
 287 #else
 288 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 289 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 290 #endif /* CONFIG_UFS_DEBUG */
 291
 292 static const struct super_operations ufs_super_ops;
 293
 294 static char error_buf[1024];
 295
 296 void ufs_error (struct super_block * sb, const char * function,
 297         const char * fmt, ...)
 298 {
 299         struct ufs_sb_private_info * uspi;
 300         struct ufs_super_block_first * usb1;
 301         va_list args;
 302
 303         uspi = UFS_SB(sb)->s_uspi;
 304         usb1 = ubh_get_usb_first(uspi);
 305
 306         if (!(sb->s_flags & MS_RDONLY)) {
 307                 usb1->fs_clean = UFS_FSBAD;
 308                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 309                 sb->s_dirt = 1;
 310                 sb->s_flags |= MS_RDONLY;
 311         }
 312         va_start (args, fmt);
 313         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 314         va_end (args);
 315         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 316         case UFS_MOUNT_ONERROR_PANIC:
 317                 panic ("UFS-fs panic (device %s): %s: %s\n",
 318                         sb->s_id, function, error_buf);
 319
 320         case UFS_MOUNT_ONERROR_LOCK:
 321         case UFS_MOUNT_ONERROR_UMOUNT:
 322         case UFS_MOUNT_ONERROR_REPAIR:
 323                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 324                         sb->s_id, function, error_buf);
 325         }
 326 }
 327
 328 void ufs_panic (struct super_block * sb, const char * function,
 329         const char * fmt, ...)
 330 {
 331         struct ufs_sb_private_info * uspi;
 332         struct ufs_super_block_first * usb1;
 333         va_list args;
 334
 335         uspi = UFS_SB(sb)->s_uspi;
 336         usb1 = ubh_get_usb_first(uspi);
 337
 338         if (!(sb->s_flags & MS_RDONLY)) {
 339                 usb1->fs_clean = UFS_FSBAD;
 340                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 341                 sb->s_dirt = 1;
 342         }
 343         va_start (args, fmt);
 344         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 345         va_end (args);
 346         sb->s_flags |= MS_RDONLY;
 347         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 348                 sb->s_id, function, error_buf);
 349 }
 350
 351 void ufs_warning (struct super_block * sb, const char * function,
 352         const char * fmt, ...)
 353 {
 354         va_list args;
 355
 356         va_start (args, fmt);
 357         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 358         va_end (args);
 359         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 360                 sb->s_id, function, error_buf);
 361 }
 362
 363 enum {
 364        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 365        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 366        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 367        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 368        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 369        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 370        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 371        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 372        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 373        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 374        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 375        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 376        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 377        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 378        Opt_err
 379 };
 380
 381 static const match_table_t tokens = {
 382         {Opt_type_old, "ufstype=old"},
 383         {Opt_type_sunx86, "ufstype=sunx86"},
 384         {Opt_type_sun, "ufstype=sun"},
 385         {Opt_type_sunos, "ufstype=sunos"},
 386         {Opt_type_44bsd, "ufstype=44bsd"},
 387         {Opt_type_ufs2, "ufstype=ufs2"},
 388         {Opt_type_ufs2, "ufstype=5xbsd"},
 389         {Opt_type_hp, "ufstype=hp"},
 390         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 391         {Opt_type_nextstep, "ufstype=nextstep"},
 392         {Opt_type_openstep, "ufstype=openstep"},
 393 /*end of possible ufs types */
 394         {Opt_onerror_panic, "onerror=panic"},
 395         {Opt_onerror_lock, "onerror=lock"},
 396         {Opt_onerror_umount, "onerror=umount"},
 397         {Opt_onerror_repair, "onerror=repair"},
 398         {Opt_err, NULL}
 399 };
 400
 401 static int ufs_parse_options (char * options, unsigned * mount_options)
 402 {
 403         char * p;
 404
 405         UFSD("ENTER\n");
 406
 407         if (!options)
 408                 return 1;
 409
 410         while ((p = strsep(&options, ",")) != NULL) {
 411                 substring_t args[MAX_OPT_ARGS];
 412                 int token;
 413                 if (!*p)
 414                         continue;
 415
 416                 token = match_token(p, tokens, args);
 417                 switch (token) {
 418                 case Opt_type_old:
 419                         ufs_clear_opt (*mount_options, UFSTYPE);
 420                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 421                         break;
 422                 case Opt_type_sunx86:
 423                         ufs_clear_opt (*mount_options, UFSTYPE);
 424                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 425                         break;
 426                 case Opt_type_sun:
 427                         ufs_clear_opt (*mount_options, UFSTYPE);
 428                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 429                         break;
 430                 case Opt_type_sunos:
 431                         ufs_clear_opt(*mount_options, UFSTYPE);
 432                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 433                         break;
 434                 case Opt_type_44bsd:
 435                         ufs_clear_opt (*mount_options, UFSTYPE);
 436                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 437                         break;
 438                 case Opt_type_ufs2:
 439                         ufs_clear_opt(*mount_options, UFSTYPE);
 440                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 441                         break;
 442                 case Opt_type_hp:
 443                         ufs_clear_opt (*mount_options, UFSTYPE);
 444                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 445                         break;
 446                 case Opt_type_nextstepcd:
 447                         ufs_clear_opt (*mount_options, UFSTYPE);
 448                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 449                         break;
 450                 case Opt_type_nextstep:
 451                         ufs_clear_opt (*mount_options, UFSTYPE);
 452                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 453                         break;
 454                 case Opt_type_openstep:
 455                         ufs_clear_opt (*mount_options, UFSTYPE);
 456                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 457                         break;
 458                 case Opt_onerror_panic:
 459                         ufs_clear_opt (*mount_options, ONERROR);
 460                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 461                         break;
 462                 case Opt_onerror_lock:
 463                         ufs_clear_opt (*mount_options, ONERROR);
 464                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 465                         break;
 466                 case Opt_onerror_umount:
 467                         ufs_clear_opt (*mount_options, ONERROR);
 468                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 469                         break;
 470                 case Opt_onerror_repair:
 471                         printk("UFS-fs: Unable to do repair on error, "
 472                                 "will lock lock instead\n");
 473                         ufs_clear_opt (*mount_options, ONERROR);
 474                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 475                         break;
 476                 default:
 477                         printk("UFS-fs: Invalid option: \"%s\" "
 478                                         "or missing value\n", p);
 479                         return 0;
 480                 }
 481         }
 482         return 1;
 483 }
 484
 485 /*
 486  * Different types of UFS hold fs_cstotal in different
 487  * places, and use different data structure for it.
 488  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
 489  */
 490 static void ufs_setup_cstotal(struct super_block *sb)
 491 {
 492         struct ufs_sb_info *sbi = UFS_SB(sb);
 493         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 494         struct ufs_super_block_first *usb1;
 495         struct ufs_super_block_second *usb2;
 496         struct ufs_super_block_third *usb3;
 497         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 498
 499         UFSD("ENTER, mtype=%u\n", mtype);
 500         usb1 = ubh_get_usb_first(uspi);
 501         usb2 = ubh_get_usb_second(uspi);
 502         usb3 = ubh_get_usb_third(uspi);
 503
 504         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 505              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 506             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 507                 /*we have statistic in different place, then usual*/
 508                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 509                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 510                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 511                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 512         } else {
 513                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 514                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 515                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 516                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 517         }
 518         UFSD("EXIT\n");
 519 }
 520
 521 /*
 522  * Read on-disk structures associated with cylinder groups
 523  */
 524 static int ufs_read_cylinder_structures(struct super_block *sb)
 525 {
 526         struct ufs_sb_info *sbi = UFS_SB(sb);
 527         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 528         struct ufs_buffer_head * ubh;
 529         unsigned char * base, * space;
 530         unsigned size, blks, i;
 531         struct ufs_super_block_third *usb3;
 532
 533         UFSD("ENTER\n");
 534
 535         usb3 = ubh_get_usb_third(uspi);
 536         /*
 537          * Read cs structures from (usually) first data block
 538          * on the device.
 539          */
 540         size = uspi->s_cssize;
 541         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 542         base = space = kmalloc(size, GFP_NOFS);
 543         if (!base)
 544                 goto failed;
 545         sbi->s_csp = (struct ufs_csum *)space;
 546         for (i = 0; i < blks; i += uspi->s_fpb) {
 547                 size = uspi->s_bsize;
 548                 if (i + uspi->s_fpb > blks)
 549                         size = (blks - i) * uspi->s_fsize;
 550
 551                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 552
 553                 if (!ubh)
 554                         goto failed;
 555
 556                 ubh_ubhcpymem (space, ubh, size);
 557
 558                 space += size;
 559                 ubh_brelse (ubh);
 560                 ubh = NULL;
 561         }
 562
 563         /*
 564          * Read cylinder group (we read only first fragment from block
 565          * at this time) and prepare internal data structures for cg caching.
 566          */
 567         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
 568                 goto failed;
 569         for (i = 0; i < uspi->s_ncg; i++)
 570                 sbi->s_ucg[i] = NULL;
 571         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 572                 sbi->s_ucpi[i] = NULL;
 573                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 574         }
 575         for (i = 0; i < uspi->s_ncg; i++) {
 576                 UFSD("read cg %u\n", i);
 577                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 578                         goto failed;
 579                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 580                         goto failed;
 581
 582                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 583         }
 584         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 585                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
 586                         goto failed;
 587                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 588         }
 589         sbi->s_cg_loaded = 0;
 590         UFSD("EXIT\n");
 591         return 1;
 592
 593 failed:
 594         kfree (base);
 595         if (sbi->s_ucg) {
 596                 for (i = 0; i < uspi->s_ncg; i++)
 597                         if (sbi->s_ucg[i])
 598                                 brelse (sbi->s_ucg[i]);
 599                 kfree (sbi->s_ucg);
 600                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 601                         kfree (sbi->s_ucpi[i]);
 602         }
 603         UFSD("EXIT (FAILED)\n");
 604         return 0;
 605 }
 606
 607 /*
 608  * Sync our internal copy of fs_cstotal with disk
 609  */
 610 static void ufs_put_cstotal(struct super_block *sb)
 611 {
 612         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 613         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 614         struct ufs_super_block_first *usb1;
 615         struct ufs_super_block_second *usb2;
 616         struct ufs_super_block_third *usb3;
 617
 618         UFSD("ENTER\n");
 619         usb1 = ubh_get_usb_first(uspi);
 620         usb2 = ubh_get_usb_second(uspi);
 621         usb3 = ubh_get_usb_third(uspi);
 622
 623         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 624              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 625             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 626                 /*we have statistic in different place, then usual*/
 627                 usb2->fs_un.fs_u2.cs_ndir =
 628                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 629                 usb2->fs_un.fs_u2.cs_nbfree =
 630                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 631                 usb3->fs_un1.fs_u2.cs_nifree =
 632                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 633                 usb3->fs_un1.fs_u2.cs_nffree =
 634                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 635         } else {
 636                 usb1->fs_cstotal.cs_ndir =
 637                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 638                 usb1->fs_cstotal.cs_nbfree =
 639                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 640                 usb1->fs_cstotal.cs_nifree =
 641                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 642                 usb1->fs_cstotal.cs_nffree =
 643                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 644         }
 645         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 646         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 647         UFSD("EXIT\n");
 648 }
 649
 650 /**
 651  * ufs_put_super_internal() - put on-disk intrenal structures
 652  * @sb: pointer to super_block structure
 653  * Put on-disk structures associated with cylinder groups
 654  * and write them back to disk, also update cs_total on disk
 655  */
 656 static void ufs_put_super_internal(struct super_block *sb)
 657 {
 658         struct ufs_sb_info *sbi = UFS_SB(sb);
 659         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 660         struct ufs_buffer_head * ubh;
 661         unsigned char * base, * space;
 662         unsigned blks, size, i;
 663
 664
 665         UFSD("ENTER\n");
 666
 667         ufs_put_cstotal(sb);
 668         size = uspi->s_cssize;
 669         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 670         base = space = (char*) sbi->s_csp;
 671         for (i = 0; i < blks; i += uspi->s_fpb) {
 672                 size = uspi->s_bsize;
 673                 if (i + uspi->s_fpb > blks)
 674                         size = (blks - i) * uspi->s_fsize;
 675
 676                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 677
 678                 ubh_memcpyubh (ubh, space, size);
 679                 space += size;
 680                 ubh_mark_buffer_uptodate (ubh, 1);
 681                 ubh_mark_buffer_dirty (ubh);
 682                 ubh_brelse (ubh);
 683         }
 684         for (i = 0; i < sbi->s_cg_loaded; i++) {
 685                 ufs_put_cylinder (sb, i);
 686                 kfree (sbi->s_ucpi[i]);
 687         }
 688         for (; i < UFS_MAX_GROUP_LOADED; i++)
 689                 kfree (sbi->s_ucpi[i]);
 690         for (i = 0; i < uspi->s_ncg; i++)
 691                 brelse (sbi->s_ucg[i]);
 692         kfree (sbi->s_ucg);
 693         kfree (base);
 694
 695         UFSD("EXIT\n");
 696 }
 697
 698 static u64 ufs_max_bytes(struct super_block *sb)
 699 {
 700         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 701         int bits = uspi->s_apbshift;
 702         u64 res;
 703
 704         if (bits > 21)
 705                 res = ~0ULL;
 706         else
 707                 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
 708                         (1LL << (3*bits));
 709
 710         if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
 711                 return MAX_LFS_FILESIZE;
 712         return res << uspi->s_bshift;
 713 }
 714
 715 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 716 {
 717         struct ufs_sb_info * sbi;
 718         struct ufs_sb_private_info * uspi;
 719         struct ufs_super_block_first * usb1;
 720         struct ufs_super_block_second * usb2;
 721         struct ufs_super_block_third * usb3;
 722         struct ufs_buffer_head * ubh;
 723         struct inode *inode;
 724         unsigned block_size, super_block_size;
 725         unsigned flags;
 726         unsigned super_block_offset;
 727         unsigned maxsymlen;
 728         int ret = -EINVAL;
 729
 730         uspi = NULL;
 731         ubh = NULL;
 732         flags = 0;
 733
 734         UFSD("ENTER\n");
 735
 736         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 737         if (!sbi)
 738                 goto failed_nomem;
 739         sb->s_fs_info = sbi;
 740
 741         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 742
 743 #ifndef CONFIG_UFS_FS_WRITE
 744         if (!(sb->s_flags & MS_RDONLY)) {
 745                 printk("ufs was compiled with read-only support, "
 746                 "can't be mounted as read-write\n");
 747                 goto failed;
 748         }
 749 #endif
 750         mutex_init(&sbi->mutex);
 751         /*
 752          * Set default mount options
 753          * Parse mount options
 754          */
 755         sbi->s_mount_opt = 0;
 756         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 757         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 758                 printk("wrong mount options\n");
 759                 goto failed;
 760         }
 761         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 762                 if (!silent)
 763                         printk("You didn't specify the type of your ufs filesystem\n\n"
 764                         "mount -t ufs -o ufstype="
 765                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 766                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 767                         "default is ufstype=old\n");
 768                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 769         }
 770
 771         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 772         sbi->s_uspi = uspi;
 773         if (!uspi)
 774                 goto failed;
 775         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 776         super_block_offset=UFS_SBLOCK;
 777
 778         /* Keep 2Gig file limit. Some UFS variants need to override
 779            this but as I don't know which I'll let those in the know loosen
 780            the rules */
 781         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 782         case UFS_MOUNT_UFSTYPE_44BSD:
 783                 UFSD("ufstype=44bsd\n");
 784                 uspi->s_fsize = block_size = 512;
 785                 uspi->s_fmask = ~(512 - 1);
 786                 uspi->s_fshift = 9;
 787                 uspi->s_sbsize = super_block_size = 1536;
 788                 uspi->s_sbbase = 0;
 789                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 790                 break;
 791         case UFS_MOUNT_UFSTYPE_UFS2:
 792                 UFSD("ufstype=ufs2\n");
 793                 super_block_offset=SBLOCK_UFS2;
 794                 uspi->s_fsize = block_size = 512;
 795                 uspi->s_fmask = ~(512 - 1);
 796                 uspi->s_fshift = 9;
 797                 uspi->s_sbsize = super_block_size = 1536;
 798                 uspi->s_sbbase =  0;
 799                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 800                 break;
 801
 802         case UFS_MOUNT_UFSTYPE_SUN:
 803                 UFSD("ufstype=sun\n");
 804                 uspi->s_fsize = block_size = 1024;
 805                 uspi->s_fmask = ~(1024 - 1);
 806                 uspi->s_fshift = 10;
 807                 uspi->s_sbsize = super_block_size = 2048;
 808                 uspi->s_sbbase = 0;
 809                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 810                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 811                 break;
 812
 813         case UFS_MOUNT_UFSTYPE_SUNOS:
 814                 UFSD(("ufstype=sunos\n"))
 815                 uspi->s_fsize = block_size = 1024;
 816                 uspi->s_fmask = ~(1024 - 1);
 817                 uspi->s_fshift = 10;
 818                 uspi->s_sbsize = 2048;
 819                 super_block_size = 2048;
 820                 uspi->s_sbbase = 0;
 821                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 822                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 823                 break;
 824
 825         case UFS_MOUNT_UFSTYPE_SUNx86:
 826                 UFSD("ufstype=sunx86\n");
 827                 uspi->s_fsize = block_size = 1024;
 828                 uspi->s_fmask = ~(1024 - 1);
 829                 uspi->s_fshift = 10;
 830                 uspi->s_sbsize = super_block_size = 2048;
 831                 uspi->s_sbbase = 0;
 832                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 833                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 834                 break;
 835
 836         case UFS_MOUNT_UFSTYPE_OLD:
 837                 UFSD("ufstype=old\n");
 838                 uspi->s_fsize = block_size = 1024;
 839                 uspi->s_fmask = ~(1024 - 1);
 840                 uspi->s_fshift = 10;
 841                 uspi->s_sbsize = super_block_size = 2048;
 842                 uspi->s_sbbase = 0;
 843                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 844                 if (!(sb->s_flags & MS_RDONLY)) {
 845                         if (!silent)
 846                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 847                         sb->s_flags |= MS_RDONLY;
 848                 }
 849                 break;
 850
 851         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 852                 UFSD("ufstype=nextstep\n");
 853                 uspi->s_fsize = block_size = 1024;
 854                 uspi->s_fmask = ~(1024 - 1);
 855                 uspi->s_fshift = 10;
 856                 uspi->s_sbsize = super_block_size = 2048;
 857                 uspi->s_sbbase = 0;
 858                 uspi->s_dirblksize = 1024;
 859                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 860                 if (!(sb->s_flags & MS_RDONLY)) {
 861                         if (!silent)
 862                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 863                         sb->s_flags |= MS_RDONLY;
 864                 }
 865                 break;
 866
 867         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 868                 UFSD("ufstype=nextstep-cd\n");
 869                 uspi->s_fsize = block_size = 2048;
 870                 uspi->s_fmask = ~(2048 - 1);
 871                 uspi->s_fshift = 11;
 872                 uspi->s_sbsize = super_block_size = 2048;
 873                 uspi->s_sbbase = 0;
 874                 uspi->s_dirblksize = 1024;
 875                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 876                 if (!(sb->s_flags & MS_RDONLY)) {
 877                         if (!silent)
 878                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 879                         sb->s_flags |= MS_RDONLY;
 880                 }
 881                 break;
 882
 883         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 884                 UFSD("ufstype=openstep\n");
 885                 uspi->s_fsize = block_size = 1024;
 886                 uspi->s_fmask = ~(1024 - 1);
 887                 uspi->s_fshift = 10;
 888                 uspi->s_sbsize = super_block_size = 2048;
 889                 uspi->s_sbbase = 0;
 890                 uspi->s_dirblksize = 1024;
 891                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 892                 if (!(sb->s_flags & MS_RDONLY)) {
 893                         if (!silent)
 894                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 895                         sb->s_flags |= MS_RDONLY;
 896                 }
 897                 break;
 898
 899         case UFS_MOUNT_UFSTYPE_HP:
 900                 UFSD("ufstype=hp\n");
 901                 uspi->s_fsize = block_size = 1024;
 902                 uspi->s_fmask = ~(1024 - 1);
 903                 uspi->s_fshift = 10;
 904                 uspi->s_sbsize = super_block_size = 2048;
 905                 uspi->s_sbbase = 0;
 906                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 907                 if (!(sb->s_flags & MS_RDONLY)) {
 908                         if (!silent)
 909                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 910                         sb->s_flags |= MS_RDONLY;
 911                 }
 912                 break;
 913         default:
 914                 if (!silent)
 915                         printk("unknown ufstype\n");
 916                 goto failed;
 917         }
 918
 919 again:
 920         if (!sb_set_blocksize(sb, block_size)) {
 921                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 922                 goto failed;
 923         }
 924
 925         /*
 926          * read ufs super block from device
 927          */
 928
 929         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 930
 931         if (!ubh)
 932             goto failed;
 933
 934         usb1 = ubh_get_usb_first(uspi);
 935         usb2 = ubh_get_usb_second(uspi);
 936         usb3 = ubh_get_usb_third(uspi);
 937
 938         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 939         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 940         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 941             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 942                 flags &= ~UFS_ST_MASK;
 943                 flags |=  UFS_ST_SUN;
 944         }
 945
 946         /*
 947          * Check ufs magic number
 948          */
 949         sbi->s_bytesex = BYTESEX_LE;
 950         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 951                 case UFS_MAGIC:
 952                 case UFS_MAGIC_BW:
 953                 case UFS2_MAGIC:
 954                 case UFS_MAGIC_LFN:
 955                 case UFS_MAGIC_FEA:
 956                 case UFS_MAGIC_4GB:
 957                         goto magic_found;
 958         }
 959         sbi->s_bytesex = BYTESEX_BE;
 960         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 961                 case UFS_MAGIC:
 962                 case UFS_MAGIC_BW:
 963                 case UFS2_MAGIC:
 964                 case UFS_MAGIC_LFN:
 965                 case UFS_MAGIC_FEA:
 966                 case UFS_MAGIC_4GB:
 967                         goto magic_found;
 968         }
 969
 970         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 971           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 972           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 973           && uspi->s_sbbase < 256) {
 974                 ubh_brelse_uspi(uspi);
 975                 ubh = NULL;
 976                 uspi->s_sbbase += 8;
 977                 goto again;
 978         }
 979         if (!silent)
 980                 printk("ufs_read_super: bad magic number\n");
 981         goto failed;
 982
 983 magic_found:
 984         /*
 985          * Check block and fragment sizes
 986          */
 987         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 988         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 989         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 990         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 991         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 992
 993         if (!is_power_of_2(uspi->s_fsize)) {
 994                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 995                         uspi->s_fsize);
 996                         goto failed;
 997         }
 998         if (uspi->s_fsize < 512) {
 999                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
1000                         uspi->s_fsize);
1001                 goto failed;
1002         }
1003         if (uspi->s_fsize > 4096) {
1004                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
1005                         uspi->s_fsize);
1006                 goto failed;
1007         }
1008         if (!is_power_of_2(uspi->s_bsize)) {
1009                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
1010                         uspi->s_bsize);
1011                 goto failed;
1012         }
1013         if (uspi->s_bsize < 4096) {
1014                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
1015                         uspi->s_bsize);
1016                 goto failed;
1017         }
1018         if (uspi->s_bsize / uspi->s_fsize > 8) {
1019                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
1020                         uspi->s_bsize / uspi->s_fsize);
1021                 goto failed;
1022         }
1023         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1024                 ubh_brelse_uspi(uspi);
1025                 ubh = NULL;
1026                 block_size = uspi->s_fsize;
1027                 super_block_size = uspi->s_sbsize;
1028                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1029                 goto again;
1030         }
1031
1032         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1033         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1034
1035         /*
1036          * Check, if file system was correctly unmounted.
1037          * If not, make it read only.
1038          */
1039         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1040           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1041           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1042             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1043           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1044           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1045                 switch(usb1->fs_clean) {
1046                 case UFS_FSCLEAN:
1047                         UFSD("fs is clean\n");
1048                         break;
1049                 case UFS_FSSTABLE:
1050                         UFSD("fs is stable\n");
1051                         break;
1052                 case UFS_FSLOG:
1053                         UFSD("fs is logging fs\n");
1054                         break;
1055                 case UFS_FSOSF1:
1056                         UFSD("fs is DEC OSF/1\n");
1057                         break;
1058                 case UFS_FSACTIVE:
1059                         printk("ufs_read_super: fs is active\n");
1060                         sb->s_flags |= MS_RDONLY;
1061                         break;
1062                 case UFS_FSBAD:
1063                         printk("ufs_read_super: fs is bad\n");
1064                         sb->s_flags |= MS_RDONLY;
1065                         break;
1066                 default:
1067                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1068                         sb->s_flags |= MS_RDONLY;
1069                         break;
1070                 }
1071         } else {
1072                 printk("ufs_read_super: fs needs fsck\n");
1073                 sb->s_flags |= MS_RDONLY;
1074         }
1075
1076         /*
1077          * Read ufs_super_block into internal data structures
1078          */
1079         sb->s_op = &ufs_super_ops;
1080         sb->s_export_op = &ufs_export_ops;
1081
1082         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1083
1084         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1085         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1086         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1087         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1088         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1089         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1090
1091         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1092                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1093                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1094         } else {
1095                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1096                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1097         }
1098
1099         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1100         /* s_bsize already set */
1101         /* s_fsize already set */
1102         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1103         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1104         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1105         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1106         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1107         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1108         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1109                 uspi->s_fshift);
1110         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1111         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1112         /* s_sbsize already set */
1113         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1114         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1115         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1116         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1117         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1118         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1119         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1120         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1121
1122         if (uspi->fs_magic == UFS2_MAGIC)
1123                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1124         else
1125                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1126
1127         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1128         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1129         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1130         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1131         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1132         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1133         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1134         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1135         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1136         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1137         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1138         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1139         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1140         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1141
1142         /*
1143          * Compute another frequently used values
1144          */
1145         uspi->s_fpbmask = uspi->s_fpb - 1;
1146         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1147                 uspi->s_apbshift = uspi->s_bshift - 3;
1148         else
1149                 uspi->s_apbshift = uspi->s_bshift - 2;
1150
1151         uspi->s_2apbshift = uspi->s_apbshift * 2;
1152         uspi->s_3apbshift = uspi->s_apbshift * 3;
1153         uspi->s_apb = 1 << uspi->s_apbshift;
1154         uspi->s_2apb = 1 << uspi->s_2apbshift;
1155         uspi->s_3apb = 1 << uspi->s_3apbshift;
1156         uspi->s_apbmask = uspi->s_apb - 1;
1157         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1158         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1159         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1160         uspi->s_bpf = uspi->s_fsize << 3;
1161         uspi->s_bpfshift = uspi->s_fshift + 3;
1162         uspi->s_bpfmask = uspi->s_bpf - 1;
1163         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1164             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1165                 uspi->s_maxsymlinklen =
1166                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1167
1168         if (uspi->fs_magic == UFS2_MAGIC)
1169                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1170         else
1171                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1172         if (uspi->s_maxsymlinklen > maxsymlen) {
1173                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1174                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1175                 uspi->s_maxsymlinklen = maxsymlen;
1176         }
1177         sb->s_maxbytes = ufs_max_bytes(sb);
1178
1179         inode = ufs_iget(sb, UFS_ROOTINO);
1180         if (IS_ERR(inode)) {
1181                 ret = PTR_ERR(inode);
1182                 goto failed;
1183         }
1184         sb->s_root = d_alloc_root(inode);
1185         if (!sb->s_root) {
1186                 ret = -ENOMEM;
1187                 goto dalloc_failed;
1188         }
1189
1190         ufs_setup_cstotal(sb);
1191         /*
1192          * Read cylinder group structures
1193          */
1194         if (!(sb->s_flags & MS_RDONLY))
1195                 if (!ufs_read_cylinder_structures(sb))
1196                         goto failed;
1197
1198         UFSD("EXIT\n");
1199         return 0;
1200
1201 dalloc_failed:
1202         iput(inode);
1203 failed:
1204         if (ubh)
1205                 ubh_brelse_uspi (uspi);
1206         kfree (uspi);
1207         kfree(sbi);
1208         sb->s_fs_info = NULL;
1209         UFSD("EXIT (FAILED)\n");
1210         return ret;
1211
1212 failed_nomem:
1213         UFSD("EXIT (NOMEM)\n");
1214         return -ENOMEM;
1215 }
1216
1217 static int ufs_sync_fs(struct super_block *sb, int wait)
1218 {
1219         struct ufs_sb_private_info * uspi;
1220         struct ufs_super_block_first * usb1;
1221         struct ufs_super_block_third * usb3;
1222         unsigned flags;
1223
1224         lock_ufs(sb);
1225         lock_super(sb);
1226
1227         UFSD("ENTER\n");
1228
1229         flags = UFS_SB(sb)->s_flags;
1230         uspi = UFS_SB(sb)->s_uspi;
1231         usb1 = ubh_get_usb_first(uspi);
1232         usb3 = ubh_get_usb_third(uspi);
1233
1234         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1235         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
1236             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1237             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1238                 ufs_set_fs_state(sb, usb1, usb3,
1239                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1240         ufs_put_cstotal(sb);
1241         sb->s_dirt = 0;
1242
1243         UFSD("EXIT\n");
1244         unlock_super(sb);
1245         unlock_ufs(sb);
1246
1247         return 0;
1248 }
1249
1250 static void ufs_write_super(struct super_block *sb)
1251 {
1252         if (!(sb->s_flags & MS_RDONLY))
1253                 ufs_sync_fs(sb, 1);
1254         else
1255                 sb->s_dirt = 0;
1256 }
1257
1258 static void ufs_put_super(struct super_block *sb)
1259 {
1260         struct ufs_sb_info * sbi = UFS_SB(sb);
1261
1262         UFSD("ENTER\n");
1263
1264         if (sb->s_dirt)
1265                 ufs_write_super(sb);
1266
1267         if (!(sb->s_flags & MS_RDONLY))
1268                 ufs_put_super_internal(sb);
1269
1270         ubh_brelse_uspi (sbi->s_uspi);
1271         kfree (sbi->s_uspi);
1272         kfree (sbi);
1273         sb->s_fs_info = NULL;
1274         UFSD("EXIT\n");
1275         return;
1276 }
1277
1278
1279 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1280 {
1281         struct ufs_sb_private_info * uspi;
1282         struct ufs_super_block_first * usb1;
1283         struct ufs_super_block_third * usb3;
1284         unsigned new_mount_opt, ufstype;
1285         unsigned flags;
1286
1287         lock_ufs(sb);
1288         lock_super(sb);
1289         uspi = UFS_SB(sb)->s_uspi;
1290         flags = UFS_SB(sb)->s_flags;
1291         usb1 = ubh_get_usb_first(uspi);
1292         usb3 = ubh_get_usb_third(uspi);
1293
1294         /*
1295          * Allow the "check" option to be passed as a remount option.
1296          * It is not possible to change ufstype option during remount
1297          */
1298         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1299         new_mount_opt = 0;
1300         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1301         if (!ufs_parse_options (data, &new_mount_opt)) {
1302                 unlock_super(sb);
1303                 unlock_ufs(sb);
1304                 return -EINVAL;
1305         }
1306         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1307                 new_mount_opt |= ufstype;
1308         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1309                 printk("ufstype can't be changed during remount\n");
1310                 unlock_super(sb);
1311                 unlock_ufs(sb);
1312                 return -EINVAL;
1313         }
1314
1315         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1316                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1317                 unlock_super(sb);
1318                 unlock_ufs(sb);
1319                 return 0;
1320         }
1321
1322         /*
1323          * fs was mouted as rw, remounting ro
1324          */
1325         if (*mount_flags & MS_RDONLY) {
1326                 ufs_put_super_internal(sb);
1327                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1328                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1329                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1330                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1331                         ufs_set_fs_state(sb, usb1, usb3,
1332                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1333                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1334                 sb->s_dirt = 0;
1335                 sb->s_flags |= MS_RDONLY;
1336         } else {
1337         /*
1338          * fs was mounted as ro, remounting rw
1339          */
1340 #ifndef CONFIG_UFS_FS_WRITE
1341                 printk("ufs was compiled with read-only support, "
1342                 "can't be mounted as read-write\n");
1343                 unlock_super(sb);
1344                 unlock_ufs(sb);
1345                 return -EINVAL;
1346 #else
1347                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1348                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1349                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1350                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1351                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1352                         printk("this ufstype is read-only supported\n");
1353                         unlock_super(sb);
1354                         unlock_ufs(sb);
1355                         return -EINVAL;
1356                 }
1357                 if (!ufs_read_cylinder_structures(sb)) {
1358                         printk("failed during remounting\n");
1359                         unlock_super(sb);
1360                         unlock_ufs(sb);
1361                         return -EPERM;
1362                 }
1363                 sb->s_flags &= ~MS_RDONLY;
1364 #endif
1365         }
1366         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1367         unlock_super(sb);
1368         unlock_ufs(sb);
1369         return 0;
1370 }
1371
1372 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1373 {
1374         struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1375         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1376         const struct match_token *tp = tokens;
1377
1378         while (tp->token != Opt_onerror_panic && tp->token != mval)
1379                 ++tp;
1380         BUG_ON(tp->token == Opt_onerror_panic);
1381         seq_printf(seq, ",%s", tp->pattern);
1382
1383         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1384         while (tp->token != Opt_err && tp->token != mval)
1385                 ++tp;
1386         BUG_ON(tp->token == Opt_err);
1387         seq_printf(seq, ",%s", tp->pattern);
1388
1389         return 0;
1390 }
1391
1392 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1393 {
1394         struct super_block *sb = dentry->d_sb;
1395         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1396         unsigned  flags = UFS_SB(sb)->s_flags;
1397         struct ufs_super_block_first *usb1;
1398         struct ufs_super_block_second *usb2;
1399         struct ufs_super_block_third *usb3;
1400         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1401
1402         lock_ufs(sb);
1403
1404         usb1 = ubh_get_usb_first(uspi);
1405         usb2 = ubh_get_usb_second(uspi);
1406         usb3 = ubh_get_usb_third(uspi);
1407
1408         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1409                 buf->f_type = UFS2_MAGIC;
1410                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1411         } else {
1412                 buf->f_type = UFS_MAGIC;
1413                 buf->f_blocks = uspi->s_dsize;
1414         }
1415         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1416                 uspi->cs_total.cs_nffree;
1417         buf->f_ffree = uspi->cs_total.cs_nifree;
1418         buf->f_bsize = sb->s_blocksize;
1419         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1420                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1421         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1422         buf->f_namelen = UFS_MAXNAMLEN;
1423         buf->f_fsid.val[0] = (u32)id;
1424         buf->f_fsid.val[1] = (u32)(id >> 32);
1425
1426         unlock_ufs(sb);
1427
1428         return 0;
1429 }
1430
1431 static struct kmem_cache * ufs_inode_cachep;
1432
1433 static struct inode *ufs_alloc_inode(struct super_block *sb)
1434 {
1435         struct ufs_inode_info *ei;
1436         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1437         if (!ei)
1438                 return NULL;
1439         ei->vfs_inode.i_version = 1;
1440         return &ei->vfs_inode;
1441 }
1442
1443 static void ufs_i_callback(struct rcu_head *head)
1444 {
1445         struct inode *inode = container_of(head, struct inode, i_rcu);
1446         INIT_LIST_HEAD(&inode->i_dentry);
1447         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1448 }
1449
1450 static void ufs_destroy_inode(struct inode *inode)
1451 {
1452         call_rcu(&inode->i_rcu, ufs_i_callback);
1453 }
1454
1455 static void init_once(void *foo)
1456 {
1457         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1458
1459         inode_init_once(&ei->vfs_inode);
1460 }
1461
1462 static int init_inodecache(void)
1463 {
1464         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1465                                              sizeof(struct ufs_inode_info),
1466                                              0, (SLAB_RECLAIM_ACCOUNT|
1467                                                 SLAB_MEM_SPREAD),
1468                                              init_once);
1469         if (ufs_inode_cachep == NULL)
1470                 return -ENOMEM;
1471         return 0;
1472 }
1473
1474 static void destroy_inodecache(void)
1475 {
1476         kmem_cache_destroy(ufs_inode_cachep);
1477 }
1478
1479 static const struct super_operations ufs_super_ops = {
1480         .alloc_inode    = ufs_alloc_inode,
1481         .destroy_inode  = ufs_destroy_inode,
1482         .write_inode    = ufs_write_inode,
1483         .evict_inode    = ufs_evict_inode,
1484         .put_super      = ufs_put_super,
1485         .write_super    = ufs_write_super,
1486         .sync_fs        = ufs_sync_fs,
1487         .statfs         = ufs_statfs,
1488         .remount_fs     = ufs_remount,
1489         .show_options   = ufs_show_options,
1490 };
1491
1492 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1493         int flags, const char *dev_name, void *data)
1494 {
1495         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1496 }
1497
1498 static struct file_system_type ufs_fs_type = {
1499         .owner          = THIS_MODULE,
1500         .name           = "ufs",
1501         .mount          = ufs_mount,
1502         .kill_sb        = kill_block_super,
1503         .fs_flags       = FS_REQUIRES_DEV,
1504 };
1505
1506 static int __init init_ufs_fs(void)
1507 {
1508         int err = init_inodecache();
1509         if (err)
1510                 goto out1;
1511         err = register_filesystem(&ufs_fs_type);
1512         if (err)
1513                 goto out;
1514         return 0;
1515 out:
1516         destroy_inodecache();
1517 out1:
1518         return err;
1519 }
1520
1521 static void __exit exit_ufs_fs(void)
1522 {
1523         unregister_filesystem(&ufs_fs_type);
1524         destroy_inodecache();
1525 }
1526
1527 module_init(init_ufs_fs)
1528 module_exit(exit_ufs_fs)
1529 MODULE_LICENSE("GPL");