fs/ufs/super.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  linux/fs/ufs/super.c
   4  *
   5  * Copyright (C) 1998
   6  * Daniel Pirkl <daniel.pirkl@email.cz>
   7  * Charles University, Faculty of Mathematics and Physics
   8  */
   9
  10 /* Derived from
  11  *
  12  *  linux/fs/ext2/super.c
  13  *
  14  * Copyright (C) 1992, 1993, 1994, 1995
  15  * Remy Card (card@masi.ibp.fr)
  16  * Laboratoire MASI - Institut Blaise Pascal
  17  * Universite Pierre et Marie Curie (Paris VI)
  18  *
  19  *  from
  20  *
  21  *  linux/fs/minix/inode.c
  22  *
  23  *  Copyright (C) 1991, 1992  Linus Torvalds
  24  *
  25  *  Big-endian to little-endian byte-swapping/bitmaps by
  26  *        David S. Miller (davem@caip.rutgers.edu), 1995
  27  */
  28
  29 /*
  30  * Inspired by
  31  *
  32  *  linux/fs/ufs/super.c
  33  *
  34  * Copyright (C) 1996
  35  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  36  * Laboratory for Computer Science Research Computing Facility
  37  * Rutgers, The State University of New Jersey
  38  *
  39  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  40  *
  41  * Kernel module support added on 96/04/26 by
  42  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  43  *
  44  * Module usage counts added on 96/04/29 by
  45  * Gertjan van Wingerde <gwingerde@gmail.com>
  46  *
  47  * Clean swab support on 19970406 by
  48  * Francois-Rene Rideau <fare@tunes.org>
  49  *
  50  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  51  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  52  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  53  *
  54  * NeXTstep support added on February 5th 1998 by
  55  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  56  *
  57  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  58  *
  59  * HP/UX hfs filesystem support added by
  60  * Martin K. Petersen <mkp@mkp.net>, August 1999
  61  *
  62  * UFS2 (of FreeBSD 5.x) support added by
  63  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  64  *
  65  * UFS2 write support added by
  66  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  67  */
  68
  69 #include <linux/exportfs.h>
  70 #include <linux/module.h>
  71 #include <linux/bitops.h>
  72
  73 #include <linux/stdarg.h>
  74
  75 #include <linux/uaccess.h>
  76
  77 #include <linux/errno.h>
  78 #include <linux/fs.h>
  79 #include <linux/slab.h>
  80 #include <linux/time.h>
  81 #include <linux/stat.h>
  82 #include <linux/string.h>
  83 #include <linux/blkdev.h>
  84 #include <linux/backing-dev.h>
  85 #include <linux/init.h>
  86 #include <linux/parser.h>
  87 #include <linux/buffer_head.h>
  88 #include <linux/vfs.h>
  89 #include <linux/log2.h>
  90 #include <linux/mount.h>
  91 #include <linux/seq_file.h>
  92 #include <linux/iversion.h>
  93
  94 #include "ufs_fs.h"
  95 #include "ufs.h"
  96 #include "swab.h"
  97 #include "util.h"
  98
  99 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 100 {
 101         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 102         struct inode *inode;
 103
 104         if (ino < UFS_ROOTINO || ino > (u64)uspi->s_ncg * uspi->s_ipg)
 105                 return ERR_PTR(-ESTALE);
 106
 107         inode = ufs_iget(sb, ino);
 108         if (IS_ERR(inode))
 109                 return ERR_CAST(inode);
 110         if (generation && inode->i_generation != generation) {
 111                 iput(inode);
 112                 return ERR_PTR(-ESTALE);
 113         }
 114         return inode;
 115 }
 116
 117 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 118                                        int fh_len, int fh_type)
 119 {
 120         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 121 }
 122
 123 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 124                                        int fh_len, int fh_type)
 125 {
 126         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 127 }
 128
 129 static struct dentry *ufs_get_parent(struct dentry *child)
 130 {
 131         ino_t ino;
 132
 133         ino = ufs_inode_by_name(d_inode(child), &dotdot_name);
 134         if (!ino)
 135                 return ERR_PTR(-ENOENT);
 136         return d_obtain_alias(ufs_iget(child->d_sb, ino));
 137 }
 138
 139 static const struct export_operations ufs_export_ops = {
 140         .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         sb->s_time_gran = NSEC_PER_SEC;
 846         sb->s_time_min = S32_MIN;
 847         sb->s_time_max = S32_MAX;
 848
 849         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 850         case UFS_MOUNT_UFSTYPE_44BSD:
 851                 UFSD("ufstype=44bsd\n");
 852                 uspi->s_fsize = block_size = 512;
 853                 uspi->s_fmask = ~(512 - 1);
 854                 uspi->s_fshift = 9;
 855                 uspi->s_sbsize = super_block_size = 1536;
 856                 uspi->s_sbbase = 0;
 857                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 858                 break;
 859         case UFS_MOUNT_UFSTYPE_UFS2:
 860                 UFSD("ufstype=ufs2\n");
 861                 super_block_offset=SBLOCK_UFS2;
 862                 uspi->s_fsize = block_size = 512;
 863                 uspi->s_fmask = ~(512 - 1);
 864                 uspi->s_fshift = 9;
 865                 uspi->s_sbsize = super_block_size = 1536;
 866                 uspi->s_sbbase =  0;
 867                 sb->s_time_gran = 1;
 868                 sb->s_time_min = S64_MIN;
 869                 sb->s_time_max = S64_MAX;
 870                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 871                 break;
 872
 873         case UFS_MOUNT_UFSTYPE_SUN:
 874                 UFSD("ufstype=sun\n");
 875                 uspi->s_fsize = block_size = 1024;
 876                 uspi->s_fmask = ~(1024 - 1);
 877                 uspi->s_fshift = 10;
 878                 uspi->s_sbsize = super_block_size = 2048;
 879                 uspi->s_sbbase = 0;
 880                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 881                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 882                 break;
 883
 884         case UFS_MOUNT_UFSTYPE_SUNOS:
 885                 UFSD("ufstype=sunos\n");
 886                 uspi->s_fsize = block_size = 1024;
 887                 uspi->s_fmask = ~(1024 - 1);
 888                 uspi->s_fshift = 10;
 889                 uspi->s_sbsize = 2048;
 890                 super_block_size = 2048;
 891                 uspi->s_sbbase = 0;
 892                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 893                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 894                 break;
 895
 896         case UFS_MOUNT_UFSTYPE_SUNx86:
 897                 UFSD("ufstype=sunx86\n");
 898                 uspi->s_fsize = block_size = 1024;
 899                 uspi->s_fmask = ~(1024 - 1);
 900                 uspi->s_fshift = 10;
 901                 uspi->s_sbsize = super_block_size = 2048;
 902                 uspi->s_sbbase = 0;
 903                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 904                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 905                 break;
 906
 907         case UFS_MOUNT_UFSTYPE_OLD:
 908                 UFSD("ufstype=old\n");
 909                 uspi->s_fsize = block_size = 1024;
 910                 uspi->s_fmask = ~(1024 - 1);
 911                 uspi->s_fshift = 10;
 912                 uspi->s_sbsize = super_block_size = 2048;
 913                 uspi->s_sbbase = 0;
 914                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 915                 if (!sb_rdonly(sb)) {
 916                         if (!silent)
 917                                 pr_info("ufstype=old is supported read-only\n");
 918                         sb->s_flags |= SB_RDONLY;
 919                 }
 920                 break;
 921
 922         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 923                 UFSD("ufstype=nextstep\n");
 924                 uspi->s_fsize = block_size = 1024;
 925                 uspi->s_fmask = ~(1024 - 1);
 926                 uspi->s_fshift = 10;
 927                 uspi->s_sbsize = super_block_size = 2048;
 928                 uspi->s_sbbase = 0;
 929                 uspi->s_dirblksize = 1024;
 930                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 931                 if (!sb_rdonly(sb)) {
 932                         if (!silent)
 933                                 pr_info("ufstype=nextstep is supported read-only\n");
 934                         sb->s_flags |= SB_RDONLY;
 935                 }
 936                 break;
 937
 938         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 939                 UFSD("ufstype=nextstep-cd\n");
 940                 uspi->s_fsize = block_size = 2048;
 941                 uspi->s_fmask = ~(2048 - 1);
 942                 uspi->s_fshift = 11;
 943                 uspi->s_sbsize = super_block_size = 2048;
 944                 uspi->s_sbbase = 0;
 945                 uspi->s_dirblksize = 1024;
 946                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 947                 if (!sb_rdonly(sb)) {
 948                         if (!silent)
 949                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
 950                         sb->s_flags |= SB_RDONLY;
 951                 }
 952                 break;
 953
 954         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 955                 UFSD("ufstype=openstep\n");
 956                 uspi->s_fsize = block_size = 1024;
 957                 uspi->s_fmask = ~(1024 - 1);
 958                 uspi->s_fshift = 10;
 959                 uspi->s_sbsize = super_block_size = 2048;
 960                 uspi->s_sbbase = 0;
 961                 uspi->s_dirblksize = 1024;
 962                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 963                 if (!sb_rdonly(sb)) {
 964                         if (!silent)
 965                                 pr_info("ufstype=openstep is supported read-only\n");
 966                         sb->s_flags |= SB_RDONLY;
 967                 }
 968                 break;
 969
 970         case UFS_MOUNT_UFSTYPE_HP:
 971                 UFSD("ufstype=hp\n");
 972                 uspi->s_fsize = block_size = 1024;
 973                 uspi->s_fmask = ~(1024 - 1);
 974                 uspi->s_fshift = 10;
 975                 uspi->s_sbsize = super_block_size = 2048;
 976                 uspi->s_sbbase = 0;
 977                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 978                 if (!sb_rdonly(sb)) {
 979                         if (!silent)
 980                                 pr_info("ufstype=hp is supported read-only\n");
 981                         sb->s_flags |= SB_RDONLY;
 982                 }
 983                 break;
 984         default:
 985                 if (!silent)
 986                         pr_err("unknown ufstype\n");
 987                 goto failed;
 988         }
 989
 990 again:
 991         if (!sb_set_blocksize(sb, block_size)) {
 992                 pr_err("failed to set blocksize\n");
 993                 goto failed;
 994         }
 995
 996         /*
 997          * read ufs super block from device
 998          */
 999
1000         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
1001
1002         if (!ubh)
1003             goto failed;
1004
1005         usb1 = ubh_get_usb_first(uspi);
1006         usb2 = ubh_get_usb_second(uspi);
1007         usb3 = ubh_get_usb_third(uspi);
1008
1009         /* Sort out mod used on SunOS 4.1.3 for fs_state */
1010         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1011         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1012             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1013                 flags &= ~UFS_ST_MASK;
1014                 flags |=  UFS_ST_SUN;
1015         }
1016
1017         if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1018             uspi->s_postblformat == UFS_42POSTBLFMT) {
1019                 if (!silent)
1020                         pr_err("this is not a 44bsd filesystem");
1021                 goto failed;
1022         }
1023
1024         /*
1025          * Check ufs magic number
1026          */
1027         sbi->s_bytesex = BYTESEX_LE;
1028         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1029                 case UFS_MAGIC:
1030                 case UFS_MAGIC_BW:
1031                 case UFS2_MAGIC:
1032                 case UFS_MAGIC_LFN:
1033                 case UFS_MAGIC_FEA:
1034                 case UFS_MAGIC_4GB:
1035                         goto magic_found;
1036         }
1037         sbi->s_bytesex = BYTESEX_BE;
1038         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1039                 case UFS_MAGIC:
1040                 case UFS_MAGIC_BW:
1041                 case UFS2_MAGIC:
1042                 case UFS_MAGIC_LFN:
1043                 case UFS_MAGIC_FEA:
1044                 case UFS_MAGIC_4GB:
1045                         goto magic_found;
1046         }
1047
1048         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1049           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1050           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1051           && uspi->s_sbbase < 256) {
1052                 ubh_brelse_uspi(uspi);
1053                 ubh = NULL;
1054                 uspi->s_sbbase += 8;
1055                 goto again;
1056         }
1057         if (!silent)
1058                 pr_err("%s(): bad magic number\n", __func__);
1059         goto failed;
1060
1061 magic_found:
1062         /*
1063          * Check block and fragment sizes
1064          */
1065         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1066         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1067         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1068         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1069         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1070
1071         if (!is_power_of_2(uspi->s_fsize)) {
1072                 pr_err("%s(): fragment size %u is not a power of 2\n",
1073                        __func__, uspi->s_fsize);
1074                 goto failed;
1075         }
1076         if (uspi->s_fsize < 512) {
1077                 pr_err("%s(): fragment size %u is too small\n",
1078                        __func__, uspi->s_fsize);
1079                 goto failed;
1080         }
1081         if (uspi->s_fsize > 4096) {
1082                 pr_err("%s(): fragment size %u is too large\n",
1083                        __func__, uspi->s_fsize);
1084                 goto failed;
1085         }
1086         if (!is_power_of_2(uspi->s_bsize)) {
1087                 pr_err("%s(): block size %u is not a power of 2\n",
1088                        __func__, uspi->s_bsize);
1089                 goto failed;
1090         }
1091         if (uspi->s_bsize < 4096) {
1092                 pr_err("%s(): block size %u is too small\n",
1093                        __func__, uspi->s_bsize);
1094                 goto failed;
1095         }
1096         if (uspi->s_bsize / uspi->s_fsize > 8) {
1097                 pr_err("%s(): too many fragments per block (%u)\n",
1098                        __func__, uspi->s_bsize / uspi->s_fsize);
1099                 goto failed;
1100         }
1101         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1102                 ubh_brelse_uspi(uspi);
1103                 ubh = NULL;
1104                 block_size = uspi->s_fsize;
1105                 super_block_size = uspi->s_sbsize;
1106                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1107                 goto again;
1108         }
1109
1110         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1111         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1112
1113         /*
1114          * Check, if file system was correctly unmounted.
1115          * If not, make it read only.
1116          */
1117         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1118           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1119           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1120             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1121           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1122           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1123                 switch(usb1->fs_clean) {
1124                 case UFS_FSCLEAN:
1125                         UFSD("fs is clean\n");
1126                         break;
1127                 case UFS_FSSTABLE:
1128                         UFSD("fs is stable\n");
1129                         break;
1130                 case UFS_FSLOG:
1131                         UFSD("fs is logging fs\n");
1132                         break;
1133                 case UFS_FSOSF1:
1134                         UFSD("fs is DEC OSF/1\n");
1135                         break;
1136                 case UFS_FSACTIVE:
1137                         pr_err("%s(): fs is active\n", __func__);
1138                         sb->s_flags |= SB_RDONLY;
1139                         break;
1140                 case UFS_FSBAD:
1141                         pr_err("%s(): fs is bad\n", __func__);
1142                         sb->s_flags |= SB_RDONLY;
1143                         break;
1144                 default:
1145                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1146                                __func__, usb1->fs_clean);
1147                         sb->s_flags |= SB_RDONLY;
1148                         break;
1149                 }
1150         } else {
1151                 pr_err("%s(): fs needs fsck\n", __func__);
1152                 sb->s_flags |= SB_RDONLY;
1153         }
1154
1155         /*
1156          * Read ufs_super_block into internal data structures
1157          */
1158         sb->s_op = &ufs_super_ops;
1159         sb->s_export_op = &ufs_export_ops;
1160
1161         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1162
1163         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1164         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1165         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1166         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1167         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1168         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1169
1170         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1171                 uspi->s_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1172                 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1173         } else {
1174                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1175                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1176         }
1177
1178         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1179         /* s_bsize already set */
1180         /* s_fsize already set */
1181         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1182         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1183         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1184         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1185         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1186         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1187         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1188                 uspi->s_fshift);
1189         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1190         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1191         /* s_sbsize already set */
1192         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1193         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1194         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1195         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1196         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1197         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1198         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1199         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1200
1201         if (uspi->fs_magic == UFS2_MAGIC)
1202                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1203         else
1204                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1205
1206         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1207         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1208         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1209         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1210         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1211         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1212         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1213         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1214         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1215         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1216         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1217         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1218         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1219         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1220
1221         uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1222                                               uspi->s_minfree, 100);
1223         if (uspi->s_minfree <= 5) {
1224                 uspi->s_time_to_space = ~0ULL;
1225                 uspi->s_space_to_time = 0;
1226                 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1227         } else {
1228                 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1229                 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1230                                               uspi->s_minfree - 2, 100) - 1;
1231         }
1232
1233         /*
1234          * Compute another frequently used values
1235          */
1236         uspi->s_fpbmask = uspi->s_fpb - 1;
1237         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1238                 uspi->s_apbshift = uspi->s_bshift - 3;
1239         else
1240                 uspi->s_apbshift = uspi->s_bshift - 2;
1241
1242         uspi->s_2apbshift = uspi->s_apbshift * 2;
1243         uspi->s_3apbshift = uspi->s_apbshift * 3;
1244         uspi->s_apb = 1 << uspi->s_apbshift;
1245         uspi->s_2apb = 1 << uspi->s_2apbshift;
1246         uspi->s_3apb = 1 << uspi->s_3apbshift;
1247         uspi->s_apbmask = uspi->s_apb - 1;
1248         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1249         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1250         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1251         uspi->s_bpf = uspi->s_fsize << 3;
1252         uspi->s_bpfshift = uspi->s_fshift + 3;
1253         uspi->s_bpfmask = uspi->s_bpf - 1;
1254         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1255             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1256                 uspi->s_maxsymlinklen =
1257                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1258
1259         if (uspi->fs_magic == UFS2_MAGIC)
1260                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1261         else
1262                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1263         if (uspi->s_maxsymlinklen > maxsymlen) {
1264                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1265                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1266                 uspi->s_maxsymlinklen = maxsymlen;
1267         }
1268         sb->s_maxbytes = ufs_max_bytes(sb);
1269         sb->s_max_links = UFS_LINK_MAX;
1270
1271         inode = ufs_iget(sb, UFS_ROOTINO);
1272         if (IS_ERR(inode)) {
1273                 ret = PTR_ERR(inode);
1274                 goto failed;
1275         }
1276         sb->s_root = d_make_root(inode);
1277         if (!sb->s_root) {
1278                 ret = -ENOMEM;
1279                 goto failed;
1280         }
1281
1282         ufs_setup_cstotal(sb);
1283         /*
1284          * Read cylinder group structures
1285          */
1286         if (!sb_rdonly(sb))
1287                 if (!ufs_read_cylinder_structures(sb))
1288                         goto failed;
1289
1290         UFSD("EXIT\n");
1291         return 0;
1292
1293 failed:
1294         if (ubh)
1295                 ubh_brelse_uspi (uspi);
1296         kfree (uspi);
1297         kfree(sbi);
1298         sb->s_fs_info = NULL;
1299         UFSD("EXIT (FAILED)\n");
1300         return ret;
1301
1302 failed_nomem:
1303         UFSD("EXIT (NOMEM)\n");
1304         return -ENOMEM;
1305 }
1306
1307 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1308 {
1309         struct ufs_sb_private_info * uspi;
1310         struct ufs_super_block_first * usb1;
1311         struct ufs_super_block_third * usb3;
1312         unsigned new_mount_opt, ufstype;
1313         unsigned flags;
1314
1315         sync_filesystem(sb);
1316         mutex_lock(&UFS_SB(sb)->s_lock);
1317         uspi = UFS_SB(sb)->s_uspi;
1318         flags = UFS_SB(sb)->s_flags;
1319         usb1 = ubh_get_usb_first(uspi);
1320         usb3 = ubh_get_usb_third(uspi);
1321
1322         /*
1323          * Allow the "check" option to be passed as a remount option.
1324          * It is not possible to change ufstype option during remount
1325          */
1326         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1327         new_mount_opt = 0;
1328         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1329         if (!ufs_parse_options (data, &new_mount_opt)) {
1330                 mutex_unlock(&UFS_SB(sb)->s_lock);
1331                 return -EINVAL;
1332         }
1333         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1334                 new_mount_opt |= ufstype;
1335         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1336                 pr_err("ufstype can't be changed during remount\n");
1337                 mutex_unlock(&UFS_SB(sb)->s_lock);
1338                 return -EINVAL;
1339         }
1340
1341         if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) {
1342                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1343                 mutex_unlock(&UFS_SB(sb)->s_lock);
1344                 return 0;
1345         }
1346
1347         /*
1348          * fs was mouted as rw, remounting ro
1349          */
1350         if (*mount_flags & SB_RDONLY) {
1351                 ufs_put_super_internal(sb);
1352                 usb1->fs_time = ufs_get_seconds(sb);
1353                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1354                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1355                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1356                         ufs_set_fs_state(sb, usb1, usb3,
1357                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1358                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1359                 sb->s_flags |= SB_RDONLY;
1360         } else {
1361         /*
1362          * fs was mounted as ro, remounting rw
1363          */
1364 #ifndef CONFIG_UFS_FS_WRITE
1365                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1366                 mutex_unlock(&UFS_SB(sb)->s_lock);
1367                 return -EINVAL;
1368 #else
1369                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1370                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1371                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1372                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1373                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1374                         pr_err("this ufstype is read-only supported\n");
1375                         mutex_unlock(&UFS_SB(sb)->s_lock);
1376                         return -EINVAL;
1377                 }
1378                 if (!ufs_read_cylinder_structures(sb)) {
1379                         pr_err("failed during remounting\n");
1380                         mutex_unlock(&UFS_SB(sb)->s_lock);
1381                         return -EPERM;
1382                 }
1383                 sb->s_flags &= ~SB_RDONLY;
1384 #endif
1385         }
1386         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1387         mutex_unlock(&UFS_SB(sb)->s_lock);
1388         return 0;
1389 }
1390
1391 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1392 {
1393         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1394         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1395         const struct match_token *tp = tokens;
1396
1397         while (tp->token != Opt_onerror_panic && tp->token != mval)
1398                 ++tp;
1399         BUG_ON(tp->token == Opt_onerror_panic);
1400         seq_printf(seq, ",%s", tp->pattern);
1401
1402         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1403         while (tp->token != Opt_err && tp->token != mval)
1404                 ++tp;
1405         BUG_ON(tp->token == Opt_err);
1406         seq_printf(seq, ",%s", tp->pattern);
1407
1408         return 0;
1409 }
1410
1411 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1412 {
1413         struct super_block *sb = dentry->d_sb;
1414         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1415         unsigned  flags = UFS_SB(sb)->s_flags;
1416         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1417
1418         mutex_lock(&UFS_SB(sb)->s_lock);
1419
1420         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1421                 buf->f_type = UFS2_MAGIC;
1422         else
1423                 buf->f_type = UFS_MAGIC;
1424
1425         buf->f_blocks = uspi->s_dsize;
1426         buf->f_bfree = ufs_freefrags(uspi);
1427         buf->f_ffree = uspi->cs_total.cs_nifree;
1428         buf->f_bsize = sb->s_blocksize;
1429         buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1430                 ? (buf->f_bfree - uspi->s_root_blocks) : 0;
1431         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1432         buf->f_namelen = UFS_MAXNAMLEN;
1433         buf->f_fsid = u64_to_fsid(id);
1434
1435         mutex_unlock(&UFS_SB(sb)->s_lock);
1436
1437         return 0;
1438 }
1439
1440 static struct kmem_cache * ufs_inode_cachep;
1441
1442 static struct inode *ufs_alloc_inode(struct super_block *sb)
1443 {
1444         struct ufs_inode_info *ei;
1445
1446         ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1447         if (!ei)
1448                 return NULL;
1449
1450         inode_set_iversion(&ei->vfs_inode, 1);
1451         seqlock_init(&ei->meta_lock);
1452         mutex_init(&ei->truncate_mutex);
1453         return &ei->vfs_inode;
1454 }
1455
1456 static void ufs_free_in_core_inode(struct inode *inode)
1457 {
1458         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1459 }
1460
1461 static void init_once(void *foo)
1462 {
1463         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1464
1465         inode_init_once(&ei->vfs_inode);
1466 }
1467
1468 static int __init init_inodecache(void)
1469 {
1470         ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
1471                                 sizeof(struct ufs_inode_info), 0,
1472                                 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
1473                                         SLAB_ACCOUNT),
1474                                 offsetof(struct ufs_inode_info, i_u1.i_symlink),
1475                                 sizeof_field(struct ufs_inode_info,
1476                                         i_u1.i_symlink),
1477                                 init_once);
1478         if (ufs_inode_cachep == NULL)
1479                 return -ENOMEM;
1480         return 0;
1481 }
1482
1483 static void destroy_inodecache(void)
1484 {
1485         /*
1486          * Make sure all delayed rcu free inodes are flushed before we
1487          * destroy cache.
1488          */
1489         rcu_barrier();
1490         kmem_cache_destroy(ufs_inode_cachep);
1491 }
1492
1493 static const struct super_operations ufs_super_ops = {
1494         .alloc_inode    = ufs_alloc_inode,
1495         .free_inode     = ufs_free_in_core_inode,
1496         .write_inode    = ufs_write_inode,
1497         .evict_inode    = ufs_evict_inode,
1498         .put_super      = ufs_put_super,
1499         .sync_fs        = ufs_sync_fs,
1500         .statfs         = ufs_statfs,
1501         .remount_fs     = ufs_remount,
1502         .show_options   = ufs_show_options,
1503 };
1504
1505 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1506         int flags, const char *dev_name, void *data)
1507 {
1508         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1509 }
1510
1511 static struct file_system_type ufs_fs_type = {
1512         .owner          = THIS_MODULE,
1513         .name           = "ufs",
1514         .mount          = ufs_mount,
1515         .kill_sb        = kill_block_super,
1516         .fs_flags       = FS_REQUIRES_DEV,
1517 };
1518 MODULE_ALIAS_FS("ufs");
1519
1520 static int __init init_ufs_fs(void)
1521 {
1522         int err = init_inodecache();
1523         if (err)
1524                 goto out1;
1525         err = register_filesystem(&ufs_fs_type);
1526         if (err)
1527                 goto out;
1528         return 0;
1529 out:
1530         destroy_inodecache();
1531 out1:
1532         return err;
1533 }
1534
1535 static void __exit exit_ufs_fs(void)
1536 {
1537         unregister_filesystem(&ufs_fs_type);
1538         destroy_inodecache();
1539 }
1540
1541 module_init(init_ufs_fs)
1542 module_exit(exit_ufs_fs)
1543 MODULE_LICENSE("GPL");