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 <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         struct qstr dot_dot = QSTR_INIT("..", 2);
 132         ino_t ino;
 133
 134         ino = ufs_inode_by_name(d_inode(child), &dot_dot);
 135         if (!ino)
 136                 return ERR_PTR(-ENOENT);
 137         return d_obtain_alias(ufs_iget(child->d_sb, ino));
 138 }
 139
 140 static const struct export_operations ufs_export_ops = {
 141         .fh_to_dentry   = ufs_fh_to_dentry,
 142         .fh_to_parent   = ufs_fh_to_parent,
 143         .get_parent     = ufs_get_parent,
 144 };
 145
 146 #ifdef CONFIG_UFS_DEBUG
 147 /*
 148  * Print contents of ufs_super_block, useful for debugging
 149  */
 150 static void ufs_print_super_stuff(struct super_block *sb,
 151                                   struct ufs_super_block_first *usb1,
 152                                   struct ufs_super_block_second *usb2,
 153                                   struct ufs_super_block_third *usb3)
 154 {
 155         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 156
 157         pr_debug("ufs_print_super_stuff\n");
 158         pr_debug("  magic:     0x%x\n", magic);
 159         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 160                 pr_debug("  fs_size:   %llu\n", (unsigned long long)
 161                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 162                 pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
 163                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 164                 pr_debug("  bsize:         %u\n",
 165                          fs32_to_cpu(sb, usb1->fs_bsize));
 166                 pr_debug("  fsize:         %u\n",
 167                          fs32_to_cpu(sb, usb1->fs_fsize));
 168                 pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 169                 pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
 170                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 171                 pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 172                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 173                 pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
 174                          (unsigned long long)
 175                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 176                 pr_info("  cs_nifree(Num of free inodes): %llu\n",
 177                         (unsigned long long)
 178                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 179                 pr_info("  cs_nffree(Num of free frags): %llu\n",
 180                         (unsigned long long)
 181                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 182                 pr_info("  fs_maxsymlinklen: %u\n",
 183                         fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 184         } else {
 185                 pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 186                 pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 187                 pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 188                 pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 189                 pr_debug(" cgoffset:    %u\n",
 190                          fs32_to_cpu(sb, usb1->fs_cgoffset));
 191                 pr_debug(" ~cgmask:     0x%x\n",
 192                          ~fs32_to_cpu(sb, usb1->fs_cgmask));
 193                 pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 194                 pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 195                 pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 196                 pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 197                 pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 198                 pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 199                 pr_debug(" fragshift:   %u\n",
 200                          fs32_to_cpu(sb, usb1->fs_fragshift));
 201                 pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 202                 pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 203                 pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 204                 pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 205                 pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 206                 pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 207                 pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 208                 pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 209                 pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 210                 pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 211                 pr_debug(" fstodb:      %u\n",
 212                          fs32_to_cpu(sb, usb1->fs_fsbtodb));
 213                 pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 214                 pr_debug(" ndir         %u\n",
 215                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 216                 pr_debug(" nifree       %u\n",
 217                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 218                 pr_debug(" nbfree       %u\n",
 219                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 220                 pr_debug(" nffree       %u\n",
 221                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 222         }
 223         pr_debug("\n");
 224 }
 225
 226 /*
 227  * Print contents of ufs_cylinder_group, useful for debugging
 228  */
 229 static void ufs_print_cylinder_stuff(struct super_block *sb,
 230                                      struct ufs_cylinder_group *cg)
 231 {
 232         pr_debug("\nufs_print_cylinder_stuff\n");
 233         pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 234         pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 235         pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 236         pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 237         pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 238         pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 239         pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 240         pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 241         pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 242         pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 243         pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 244         pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 245         pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 246         pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 247         pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 248             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 249             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 250             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 251             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 252         pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 253         pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 254         pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 255         pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 256         pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 257         pr_debug("  clustersumoff %u\n",
 258                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 259         pr_debug("  clusteroff    %u\n",
 260                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 261         pr_debug("  nclusterblks  %u\n",
 262                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 263         pr_debug("\n");
 264 }
 265 #else
 266 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 267 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 268 #endif /* CONFIG_UFS_DEBUG */
 269
 270 static const struct super_operations ufs_super_ops;
 271
 272 void ufs_error (struct super_block * sb, const char * function,
 273         const char * fmt, ...)
 274 {
 275         struct ufs_sb_private_info * uspi;
 276         struct ufs_super_block_first * usb1;
 277         struct va_format vaf;
 278         va_list args;
 279
 280         uspi = UFS_SB(sb)->s_uspi;
 281         usb1 = ubh_get_usb_first(uspi);
 282
 283         if (!sb_rdonly(sb)) {
 284                 usb1->fs_clean = UFS_FSBAD;
 285                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 286                 ufs_mark_sb_dirty(sb);
 287                 sb->s_flags |= SB_RDONLY;
 288         }
 289         va_start(args, fmt);
 290         vaf.fmt = fmt;
 291         vaf.va = &args;
 292         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 293         case UFS_MOUNT_ONERROR_PANIC:
 294                 panic("panic (device %s): %s: %pV\n",
 295                       sb->s_id, function, &vaf);
 296
 297         case UFS_MOUNT_ONERROR_LOCK:
 298         case UFS_MOUNT_ONERROR_UMOUNT:
 299         case UFS_MOUNT_ONERROR_REPAIR:
 300                 pr_crit("error (device %s): %s: %pV\n",
 301                         sb->s_id, function, &vaf);
 302         }
 303         va_end(args);
 304 }
 305
 306 void ufs_panic (struct super_block * sb, const char * function,
 307         const char * fmt, ...)
 308 {
 309         struct ufs_sb_private_info * uspi;
 310         struct ufs_super_block_first * usb1;
 311         struct va_format vaf;
 312         va_list args;
 313
 314         uspi = UFS_SB(sb)->s_uspi;
 315         usb1 = ubh_get_usb_first(uspi);
 316
 317         if (!sb_rdonly(sb)) {
 318                 usb1->fs_clean = UFS_FSBAD;
 319                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 320                 ufs_mark_sb_dirty(sb);
 321         }
 322         va_start(args, fmt);
 323         vaf.fmt = fmt;
 324         vaf.va = &args;
 325         sb->s_flags |= SB_RDONLY;
 326         pr_crit("panic (device %s): %s: %pV\n",
 327                 sb->s_id, function, &vaf);
 328         va_end(args);
 329 }
 330
 331 void ufs_warning (struct super_block * sb, const char * function,
 332         const char * fmt, ...)
 333 {
 334         struct va_format vaf;
 335         va_list args;
 336
 337         va_start(args, fmt);
 338         vaf.fmt = fmt;
 339         vaf.va = &args;
 340         pr_warn("(device %s): %s: %pV\n",
 341                 sb->s_id, function, &vaf);
 342         va_end(args);
 343 }
 344
 345 enum {
 346        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 347        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 348        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 349        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 350        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 351        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 352        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 353        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 354        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 355        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 356        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 357        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 358        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 359        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 360        Opt_err
 361 };
 362
 363 static const match_table_t tokens = {
 364         {Opt_type_old, "ufstype=old"},
 365         {Opt_type_sunx86, "ufstype=sunx86"},
 366         {Opt_type_sun, "ufstype=sun"},
 367         {Opt_type_sunos, "ufstype=sunos"},
 368         {Opt_type_44bsd, "ufstype=44bsd"},
 369         {Opt_type_ufs2, "ufstype=ufs2"},
 370         {Opt_type_ufs2, "ufstype=5xbsd"},
 371         {Opt_type_hp, "ufstype=hp"},
 372         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 373         {Opt_type_nextstep, "ufstype=nextstep"},
 374         {Opt_type_openstep, "ufstype=openstep"},
 375 /*end of possible ufs types */
 376         {Opt_onerror_panic, "onerror=panic"},
 377         {Opt_onerror_lock, "onerror=lock"},
 378         {Opt_onerror_umount, "onerror=umount"},
 379         {Opt_onerror_repair, "onerror=repair"},
 380         {Opt_err, NULL}
 381 };
 382
 383 static int ufs_parse_options (char * options, unsigned * mount_options)
 384 {
 385         char * p;
 386
 387         UFSD("ENTER\n");
 388
 389         if (!options)
 390                 return 1;
 391
 392         while ((p = strsep(&options, ",")) != NULL) {
 393                 substring_t args[MAX_OPT_ARGS];
 394                 int token;
 395                 if (!*p)
 396                         continue;
 397
 398                 token = match_token(p, tokens, args);
 399                 switch (token) {
 400                 case Opt_type_old:
 401                         ufs_clear_opt (*mount_options, UFSTYPE);
 402                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 403                         break;
 404                 case Opt_type_sunx86:
 405                         ufs_clear_opt (*mount_options, UFSTYPE);
 406                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 407                         break;
 408                 case Opt_type_sun:
 409                         ufs_clear_opt (*mount_options, UFSTYPE);
 410                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 411                         break;
 412                 case Opt_type_sunos:
 413                         ufs_clear_opt(*mount_options, UFSTYPE);
 414                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 415                         break;
 416                 case Opt_type_44bsd:
 417                         ufs_clear_opt (*mount_options, UFSTYPE);
 418                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 419                         break;
 420                 case Opt_type_ufs2:
 421                         ufs_clear_opt(*mount_options, UFSTYPE);
 422                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 423                         break;
 424                 case Opt_type_hp:
 425                         ufs_clear_opt (*mount_options, UFSTYPE);
 426                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 427                         break;
 428                 case Opt_type_nextstepcd:
 429                         ufs_clear_opt (*mount_options, UFSTYPE);
 430                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 431                         break;
 432                 case Opt_type_nextstep:
 433                         ufs_clear_opt (*mount_options, UFSTYPE);
 434                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 435                         break;
 436                 case Opt_type_openstep:
 437                         ufs_clear_opt (*mount_options, UFSTYPE);
 438                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 439                         break;
 440                 case Opt_onerror_panic:
 441                         ufs_clear_opt (*mount_options, ONERROR);
 442                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 443                         break;
 444                 case Opt_onerror_lock:
 445                         ufs_clear_opt (*mount_options, ONERROR);
 446                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 447                         break;
 448                 case Opt_onerror_umount:
 449                         ufs_clear_opt (*mount_options, ONERROR);
 450                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 451                         break;
 452                 case Opt_onerror_repair:
 453                         pr_err("Unable to do repair on error, will lock lock instead\n");
 454                         ufs_clear_opt (*mount_options, ONERROR);
 455                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 456                         break;
 457                 default:
 458                         pr_err("Invalid option: \"%s\" or missing value\n", p);
 459                         return 0;
 460                 }
 461         }
 462         return 1;
 463 }
 464
 465 /*
 466  * Different types of UFS hold fs_cstotal in different
 467  * places, and use different data structure for it.
 468  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
 469  */
 470 static void ufs_setup_cstotal(struct super_block *sb)
 471 {
 472         struct ufs_sb_info *sbi = UFS_SB(sb);
 473         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 474         struct ufs_super_block_first *usb1;
 475         struct ufs_super_block_second *usb2;
 476         struct ufs_super_block_third *usb3;
 477         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 478
 479         UFSD("ENTER, mtype=%u\n", mtype);
 480         usb1 = ubh_get_usb_first(uspi);
 481         usb2 = ubh_get_usb_second(uspi);
 482         usb3 = ubh_get_usb_third(uspi);
 483
 484         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 485              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) ||
 486             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 487                 /*we have statistic in different place, then usual*/
 488                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 489                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 490                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 491                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 492         } else {
 493                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 494                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 495                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 496                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 497         }
 498         UFSD("EXIT\n");
 499 }
 500
 501 /*
 502  * Read on-disk structures associated with cylinder groups
 503  */
 504 static int ufs_read_cylinder_structures(struct super_block *sb)
 505 {
 506         struct ufs_sb_info *sbi = UFS_SB(sb);
 507         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 508         struct ufs_buffer_head * ubh;
 509         unsigned char * base, * space;
 510         unsigned size, blks, i;
 511
 512         UFSD("ENTER\n");
 513
 514         /*
 515          * Read cs structures from (usually) first data block
 516          * on the device.
 517          */
 518         size = uspi->s_cssize;
 519         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 520         base = space = kmalloc(size, GFP_NOFS);
 521         if (!base)
 522                 goto failed;
 523         sbi->s_csp = (struct ufs_csum *)space;
 524         for (i = 0; i < blks; i += uspi->s_fpb) {
 525                 size = uspi->s_bsize;
 526                 if (i + uspi->s_fpb > blks)
 527                         size = (blks - i) * uspi->s_fsize;
 528
 529                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 530
 531                 if (!ubh)
 532                         goto failed;
 533
 534                 ubh_ubhcpymem (space, ubh, size);
 535
 536                 space += size;
 537                 ubh_brelse (ubh);
 538                 ubh = NULL;
 539         }
 540
 541         /*
 542          * Read cylinder group (we read only first fragment from block
 543          * at this time) and prepare internal data structures for cg caching.
 544          */
 545         sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *),
 546                                    GFP_NOFS);
 547         if (!sbi->s_ucg)
 548                 goto failed;
 549         for (i = 0; i < uspi->s_ncg; i++)
 550                 sbi->s_ucg[i] = NULL;
 551         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 552                 sbi->s_ucpi[i] = NULL;
 553                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 554         }
 555         for (i = 0; i < uspi->s_ncg; i++) {
 556                 UFSD("read cg %u\n", i);
 557                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 558                         goto failed;
 559                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 560                         goto failed;
 561
 562                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 563         }
 564         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 565                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
 566                         goto failed;
 567                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 568         }
 569         sbi->s_cg_loaded = 0;
 570         UFSD("EXIT\n");
 571         return 1;
 572
 573 failed:
 574         kfree (base);
 575         if (sbi->s_ucg) {
 576                 for (i = 0; i < uspi->s_ncg; i++)
 577                         if (sbi->s_ucg[i])
 578                                 brelse (sbi->s_ucg[i]);
 579                 kfree (sbi->s_ucg);
 580                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 581                         kfree (sbi->s_ucpi[i]);
 582         }
 583         UFSD("EXIT (FAILED)\n");
 584         return 0;
 585 }
 586
 587 /*
 588  * Sync our internal copy of fs_cstotal with disk
 589  */
 590 static void ufs_put_cstotal(struct super_block *sb)
 591 {
 592         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 593         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 594         struct ufs_super_block_first *usb1;
 595         struct ufs_super_block_second *usb2;
 596         struct ufs_super_block_third *usb3;
 597
 598         UFSD("ENTER\n");
 599         usb1 = ubh_get_usb_first(uspi);
 600         usb2 = ubh_get_usb_second(uspi);
 601         usb3 = ubh_get_usb_third(uspi);
 602
 603         if (mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 604                 /*we have statistic in different place, then usual*/
 605                 usb2->fs_un.fs_u2.cs_ndir =
 606                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 607                 usb2->fs_un.fs_u2.cs_nbfree =
 608                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 609                 usb3->fs_un1.fs_u2.cs_nifree =
 610                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 611                 usb3->fs_un1.fs_u2.cs_nffree =
 612                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 613                 goto out;
 614         }
 615
 616         if (mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 617              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) {
 618                 /* store stats in both old and new places */
 619                 usb2->fs_un.fs_u2.cs_ndir =
 620                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 621                 usb2->fs_un.fs_u2.cs_nbfree =
 622                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 623                 usb3->fs_un1.fs_u2.cs_nifree =
 624                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 625                 usb3->fs_un1.fs_u2.cs_nffree =
 626                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 627         }
 628         usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 629         usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 630         usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 631         usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 632 out:
 633         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 634         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 635         UFSD("EXIT\n");
 636 }
 637
 638 /**
 639  * ufs_put_super_internal() - put on-disk intrenal structures
 640  * @sb: pointer to super_block structure
 641  * Put on-disk structures associated with cylinder groups
 642  * and write them back to disk, also update cs_total on disk
 643  */
 644 static void ufs_put_super_internal(struct super_block *sb)
 645 {
 646         struct ufs_sb_info *sbi = UFS_SB(sb);
 647         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 648         struct ufs_buffer_head * ubh;
 649         unsigned char * base, * space;
 650         unsigned blks, size, i;
 651
 652
 653         UFSD("ENTER\n");
 654
 655         ufs_put_cstotal(sb);
 656         size = uspi->s_cssize;
 657         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 658         base = space = (char*) sbi->s_csp;
 659         for (i = 0; i < blks; i += uspi->s_fpb) {
 660                 size = uspi->s_bsize;
 661                 if (i + uspi->s_fpb > blks)
 662                         size = (blks - i) * uspi->s_fsize;
 663
 664                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 665
 666                 ubh_memcpyubh (ubh, space, size);
 667                 space += size;
 668                 ubh_mark_buffer_uptodate (ubh, 1);
 669                 ubh_mark_buffer_dirty (ubh);
 670                 ubh_brelse (ubh);
 671         }
 672         for (i = 0; i < sbi->s_cg_loaded; i++) {
 673                 ufs_put_cylinder (sb, i);
 674                 kfree (sbi->s_ucpi[i]);
 675         }
 676         for (; i < UFS_MAX_GROUP_LOADED; i++)
 677                 kfree (sbi->s_ucpi[i]);
 678         for (i = 0; i < uspi->s_ncg; i++)
 679                 brelse (sbi->s_ucg[i]);
 680         kfree (sbi->s_ucg);
 681         kfree (base);
 682
 683         UFSD("EXIT\n");
 684 }
 685
 686 static int ufs_sync_fs(struct super_block *sb, int wait)
 687 {
 688         struct ufs_sb_private_info * uspi;
 689         struct ufs_super_block_first * usb1;
 690         struct ufs_super_block_third * usb3;
 691         unsigned flags;
 692
 693         mutex_lock(&UFS_SB(sb)->s_lock);
 694
 695         UFSD("ENTER\n");
 696
 697         flags = UFS_SB(sb)->s_flags;
 698         uspi = UFS_SB(sb)->s_uspi;
 699         usb1 = ubh_get_usb_first(uspi);
 700         usb3 = ubh_get_usb_third(uspi);
 701
 702         usb1->fs_time = ufs_get_seconds(sb);
 703         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
 704             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 705             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 706                 ufs_set_fs_state(sb, usb1, usb3,
 707                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 708         ufs_put_cstotal(sb);
 709
 710         UFSD("EXIT\n");
 711         mutex_unlock(&UFS_SB(sb)->s_lock);
 712
 713         return 0;
 714 }
 715
 716 static void delayed_sync_fs(struct work_struct *work)
 717 {
 718         struct ufs_sb_info *sbi;
 719
 720         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
 721
 722         spin_lock(&sbi->work_lock);
 723         sbi->work_queued = 0;
 724         spin_unlock(&sbi->work_lock);
 725
 726         ufs_sync_fs(sbi->sb, 1);
 727 }
 728
 729 void ufs_mark_sb_dirty(struct super_block *sb)
 730 {
 731         struct ufs_sb_info *sbi = UFS_SB(sb);
 732         unsigned long delay;
 733
 734         spin_lock(&sbi->work_lock);
 735         if (!sbi->work_queued) {
 736                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
 737                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
 738                 sbi->work_queued = 1;
 739         }
 740         spin_unlock(&sbi->work_lock);
 741 }
 742
 743 static void ufs_put_super(struct super_block *sb)
 744 {
 745         struct ufs_sb_info * sbi = UFS_SB(sb);
 746
 747         UFSD("ENTER\n");
 748
 749         if (!sb_rdonly(sb))
 750                 ufs_put_super_internal(sb);
 751         cancel_delayed_work_sync(&sbi->sync_work);
 752
 753         ubh_brelse_uspi (sbi->s_uspi);
 754         kfree (sbi->s_uspi);
 755         kfree (sbi);
 756         sb->s_fs_info = NULL;
 757         UFSD("EXIT\n");
 758         return;
 759 }
 760
 761 static u64 ufs_max_bytes(struct super_block *sb)
 762 {
 763         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 764         int bits = uspi->s_apbshift;
 765         u64 res;
 766
 767         if (bits > 21)
 768                 res = ~0ULL;
 769         else
 770                 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
 771                         (1LL << (3*bits));
 772
 773         if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
 774                 return MAX_LFS_FILESIZE;
 775         return res << uspi->s_bshift;
 776 }
 777
 778 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 779 {
 780         struct ufs_sb_info * sbi;
 781         struct ufs_sb_private_info * uspi;
 782         struct ufs_super_block_first * usb1;
 783         struct ufs_super_block_second * usb2;
 784         struct ufs_super_block_third * usb3;
 785         struct ufs_buffer_head * ubh;
 786         struct inode *inode;
 787         unsigned block_size, super_block_size;
 788         unsigned flags;
 789         unsigned super_block_offset;
 790         unsigned maxsymlen;
 791         int ret = -EINVAL;
 792
 793         uspi = NULL;
 794         ubh = NULL;
 795         flags = 0;
 796
 797         UFSD("ENTER\n");
 798
 799 #ifndef CONFIG_UFS_FS_WRITE
 800         if (!sb_rdonly(sb)) {
 801                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 802                 return -EROFS;
 803         }
 804 #endif
 805
 806         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 807         if (!sbi)
 808                 goto failed_nomem;
 809         sb->s_fs_info = sbi;
 810         sbi->sb = sb;
 811
 812         UFSD("flag %u\n", (int)(sb_rdonly(sb)));
 813
 814         mutex_init(&sbi->s_lock);
 815         spin_lock_init(&sbi->work_lock);
 816         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
 817         /*
 818          * Set default mount options
 819          * Parse mount options
 820          */
 821         sbi->s_mount_opt = 0;
 822         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 823         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 824                 pr_err("wrong mount options\n");
 825                 goto failed;
 826         }
 827         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 828                 if (!silent)
 829                         pr_err("You didn't specify the type of your ufs filesystem\n\n"
 830                         "mount -t ufs -o ufstype="
 831                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 832                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 833                         "default is ufstype=old\n");
 834                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 835         }
 836
 837         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 838         sbi->s_uspi = uspi;
 839         if (!uspi)
 840                 goto failed;
 841         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 842         super_block_offset=UFS_SBLOCK;
 843
 844         sb->s_maxbytes = MAX_LFS_FILESIZE;
 845
 846         sb->s_time_gran = NSEC_PER_SEC;
 847         sb->s_time_min = S32_MIN;
 848         sb->s_time_max = S32_MAX;
 849
 850         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 851         case UFS_MOUNT_UFSTYPE_44BSD:
 852                 UFSD("ufstype=44bsd\n");
 853                 uspi->s_fsize = block_size = 512;
 854                 uspi->s_fmask = ~(512 - 1);
 855                 uspi->s_fshift = 9;
 856                 uspi->s_sbsize = super_block_size = 1536;
 857                 uspi->s_sbbase = 0;
 858                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 859                 break;
 860         case UFS_MOUNT_UFSTYPE_UFS2:
 861                 UFSD("ufstype=ufs2\n");
 862                 super_block_offset=SBLOCK_UFS2;
 863                 uspi->s_fsize = block_size = 512;
 864                 uspi->s_fmask = ~(512 - 1);
 865                 uspi->s_fshift = 9;
 866                 uspi->s_sbsize = super_block_size = 1536;
 867                 uspi->s_sbbase =  0;
 868                 sb->s_time_gran = 1;
 869                 sb->s_time_min = S64_MIN;
 870                 sb->s_time_max = S64_MAX;
 871                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 872                 break;
 873
 874         case UFS_MOUNT_UFSTYPE_SUN:
 875                 UFSD("ufstype=sun\n");
 876                 uspi->s_fsize = block_size = 1024;
 877                 uspi->s_fmask = ~(1024 - 1);
 878                 uspi->s_fshift = 10;
 879                 uspi->s_sbsize = super_block_size = 2048;
 880                 uspi->s_sbbase = 0;
 881                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 882                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 883                 break;
 884
 885         case UFS_MOUNT_UFSTYPE_SUNOS:
 886                 UFSD("ufstype=sunos\n");
 887                 uspi->s_fsize = block_size = 1024;
 888                 uspi->s_fmask = ~(1024 - 1);
 889                 uspi->s_fshift = 10;
 890                 uspi->s_sbsize = 2048;
 891                 super_block_size = 2048;
 892                 uspi->s_sbbase = 0;
 893                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 894                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 895                 break;
 896
 897         case UFS_MOUNT_UFSTYPE_SUNx86:
 898                 UFSD("ufstype=sunx86\n");
 899                 uspi->s_fsize = block_size = 1024;
 900                 uspi->s_fmask = ~(1024 - 1);
 901                 uspi->s_fshift = 10;
 902                 uspi->s_sbsize = super_block_size = 2048;
 903                 uspi->s_sbbase = 0;
 904                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 905                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 906                 break;
 907
 908         case UFS_MOUNT_UFSTYPE_OLD:
 909                 UFSD("ufstype=old\n");
 910                 uspi->s_fsize = block_size = 1024;
 911                 uspi->s_fmask = ~(1024 - 1);
 912                 uspi->s_fshift = 10;
 913                 uspi->s_sbsize = super_block_size = 2048;
 914                 uspi->s_sbbase = 0;
 915                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 916                 if (!sb_rdonly(sb)) {
 917                         if (!silent)
 918                                 pr_info("ufstype=old is supported read-only\n");
 919                         sb->s_flags |= SB_RDONLY;
 920                 }
 921                 break;
 922
 923         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 924                 UFSD("ufstype=nextstep\n");
 925                 uspi->s_fsize = block_size = 1024;
 926                 uspi->s_fmask = ~(1024 - 1);
 927                 uspi->s_fshift = 10;
 928                 uspi->s_sbsize = super_block_size = 2048;
 929                 uspi->s_sbbase = 0;
 930                 uspi->s_dirblksize = 1024;
 931                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 932                 if (!sb_rdonly(sb)) {
 933                         if (!silent)
 934                                 pr_info("ufstype=nextstep is supported read-only\n");
 935                         sb->s_flags |= SB_RDONLY;
 936                 }
 937                 break;
 938
 939         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 940                 UFSD("ufstype=nextstep-cd\n");
 941                 uspi->s_fsize = block_size = 2048;
 942                 uspi->s_fmask = ~(2048 - 1);
 943                 uspi->s_fshift = 11;
 944                 uspi->s_sbsize = super_block_size = 2048;
 945                 uspi->s_sbbase = 0;
 946                 uspi->s_dirblksize = 1024;
 947                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 948                 if (!sb_rdonly(sb)) {
 949                         if (!silent)
 950                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
 951                         sb->s_flags |= SB_RDONLY;
 952                 }
 953                 break;
 954
 955         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 956                 UFSD("ufstype=openstep\n");
 957                 uspi->s_fsize = block_size = 1024;
 958                 uspi->s_fmask = ~(1024 - 1);
 959                 uspi->s_fshift = 10;
 960                 uspi->s_sbsize = super_block_size = 2048;
 961                 uspi->s_sbbase = 0;
 962                 uspi->s_dirblksize = 1024;
 963                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 964                 if (!sb_rdonly(sb)) {
 965                         if (!silent)
 966                                 pr_info("ufstype=openstep is supported read-only\n");
 967                         sb->s_flags |= SB_RDONLY;
 968                 }
 969                 break;
 970
 971         case UFS_MOUNT_UFSTYPE_HP:
 972                 UFSD("ufstype=hp\n");
 973                 uspi->s_fsize = block_size = 1024;
 974                 uspi->s_fmask = ~(1024 - 1);
 975                 uspi->s_fshift = 10;
 976                 uspi->s_sbsize = super_block_size = 2048;
 977                 uspi->s_sbbase = 0;
 978                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 979                 if (!sb_rdonly(sb)) {
 980                         if (!silent)
 981                                 pr_info("ufstype=hp is supported read-only\n");
 982                         sb->s_flags |= SB_RDONLY;
 983                 }
 984                 break;
 985         default:
 986                 if (!silent)
 987                         pr_err("unknown ufstype\n");
 988                 goto failed;
 989         }
 990
 991 again:
 992         if (!sb_set_blocksize(sb, block_size)) {
 993                 pr_err("failed to set blocksize\n");
 994                 goto failed;
 995         }
 996
 997         /*
 998          * read ufs super block from device
 999          */
1000
1001         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
1002
1003         if (!ubh)
1004             goto failed;
1005
1006         usb1 = ubh_get_usb_first(uspi);
1007         usb2 = ubh_get_usb_second(uspi);
1008         usb3 = ubh_get_usb_third(uspi);
1009
1010         /* Sort out mod used on SunOS 4.1.3 for fs_state */
1011         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1012         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1013             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1014                 flags &= ~UFS_ST_MASK;
1015                 flags |=  UFS_ST_SUN;
1016         }
1017
1018         if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1019             uspi->s_postblformat == UFS_42POSTBLFMT) {
1020                 if (!silent)
1021                         pr_err("this is not a 44bsd filesystem");
1022                 goto failed;
1023         }
1024
1025         /*
1026          * Check ufs magic number
1027          */
1028         sbi->s_bytesex = BYTESEX_LE;
1029         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1030                 case UFS_MAGIC:
1031                 case UFS_MAGIC_BW:
1032                 case UFS2_MAGIC:
1033                 case UFS_MAGIC_LFN:
1034                 case UFS_MAGIC_FEA:
1035                 case UFS_MAGIC_4GB:
1036                         goto magic_found;
1037         }
1038         sbi->s_bytesex = BYTESEX_BE;
1039         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1040                 case UFS_MAGIC:
1041                 case UFS_MAGIC_BW:
1042                 case UFS2_MAGIC:
1043                 case UFS_MAGIC_LFN:
1044                 case UFS_MAGIC_FEA:
1045                 case UFS_MAGIC_4GB:
1046                         goto magic_found;
1047         }
1048
1049         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1050           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1051           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1052           && uspi->s_sbbase < 256) {
1053                 ubh_brelse_uspi(uspi);
1054                 ubh = NULL;
1055                 uspi->s_sbbase += 8;
1056                 goto again;
1057         }
1058         if (!silent)
1059                 pr_err("%s(): bad magic number\n", __func__);
1060         goto failed;
1061
1062 magic_found:
1063         /*
1064          * Check block and fragment sizes
1065          */
1066         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1067         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1068         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1069         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1070         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1071
1072         if (!is_power_of_2(uspi->s_fsize)) {
1073                 pr_err("%s(): fragment size %u is not a power of 2\n",
1074                        __func__, uspi->s_fsize);
1075                 goto failed;
1076         }
1077         if (uspi->s_fsize < 512) {
1078                 pr_err("%s(): fragment size %u is too small\n",
1079                        __func__, uspi->s_fsize);
1080                 goto failed;
1081         }
1082         if (uspi->s_fsize > 4096) {
1083                 pr_err("%s(): fragment size %u is too large\n",
1084                        __func__, uspi->s_fsize);
1085                 goto failed;
1086         }
1087         if (!is_power_of_2(uspi->s_bsize)) {
1088                 pr_err("%s(): block size %u is not a power of 2\n",
1089                        __func__, uspi->s_bsize);
1090                 goto failed;
1091         }
1092         if (uspi->s_bsize < 4096) {
1093                 pr_err("%s(): block size %u is too small\n",
1094                        __func__, uspi->s_bsize);
1095                 goto failed;
1096         }
1097         if (uspi->s_bsize / uspi->s_fsize > 8) {
1098                 pr_err("%s(): too many fragments per block (%u)\n",
1099                        __func__, uspi->s_bsize / uspi->s_fsize);
1100                 goto failed;
1101         }
1102         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1103                 ubh_brelse_uspi(uspi);
1104                 ubh = NULL;
1105                 block_size = uspi->s_fsize;
1106                 super_block_size = uspi->s_sbsize;
1107                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1108                 goto again;
1109         }
1110
1111         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1112         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1113
1114         /*
1115          * Check, if file system was correctly unmounted.
1116          * If not, make it read only.
1117          */
1118         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1119           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1120           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1121             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1122           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1123           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1124                 switch(usb1->fs_clean) {
1125                 case UFS_FSCLEAN:
1126                         UFSD("fs is clean\n");
1127                         break;
1128                 case UFS_FSSTABLE:
1129                         UFSD("fs is stable\n");
1130                         break;
1131                 case UFS_FSLOG:
1132                         UFSD("fs is logging fs\n");
1133                         break;
1134                 case UFS_FSOSF1:
1135                         UFSD("fs is DEC OSF/1\n");
1136                         break;
1137                 case UFS_FSACTIVE:
1138                         pr_err("%s(): fs is active\n", __func__);
1139                         sb->s_flags |= SB_RDONLY;
1140                         break;
1141                 case UFS_FSBAD:
1142                         pr_err("%s(): fs is bad\n", __func__);
1143                         sb->s_flags |= SB_RDONLY;
1144                         break;
1145                 default:
1146                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1147                                __func__, usb1->fs_clean);
1148                         sb->s_flags |= SB_RDONLY;
1149                         break;
1150                 }
1151         } else {
1152                 pr_err("%s(): fs needs fsck\n", __func__);
1153                 sb->s_flags |= SB_RDONLY;
1154         }
1155
1156         /*
1157          * Read ufs_super_block into internal data structures
1158          */
1159         sb->s_op = &ufs_super_ops;
1160         sb->s_export_op = &ufs_export_ops;
1161
1162         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1163
1164         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1165         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1166         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1167         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1168         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1169         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1170
1171         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1172                 uspi->s_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1173                 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1174         } else {
1175                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1176                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1177         }
1178
1179         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1180         /* s_bsize already set */
1181         /* s_fsize already set */
1182         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1183         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1184         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1185         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1186         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1187         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1188         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1189                 uspi->s_fshift);
1190         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1191         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1192         /* s_sbsize already set */
1193         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1194         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1195         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1196         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1197         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1198         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1199         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1200         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1201
1202         if (uspi->fs_magic == UFS2_MAGIC)
1203                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1204         else
1205                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1206
1207         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1208         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1209         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1210         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1211         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1212         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1213         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1214         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1215         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1216         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1217         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1218         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1219         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1220         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1221
1222         uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1223                                               uspi->s_minfree, 100);
1224         if (uspi->s_minfree <= 5) {
1225                 uspi->s_time_to_space = ~0ULL;
1226                 uspi->s_space_to_time = 0;
1227                 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1228         } else {
1229                 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1230                 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1231                                               uspi->s_minfree - 2, 100) - 1;
1232         }
1233
1234         /*
1235          * Compute another frequently used values
1236          */
1237         uspi->s_fpbmask = uspi->s_fpb - 1;
1238         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1239                 uspi->s_apbshift = uspi->s_bshift - 3;
1240         else
1241                 uspi->s_apbshift = uspi->s_bshift - 2;
1242
1243         uspi->s_2apbshift = uspi->s_apbshift * 2;
1244         uspi->s_3apbshift = uspi->s_apbshift * 3;
1245         uspi->s_apb = 1 << uspi->s_apbshift;
1246         uspi->s_2apb = 1 << uspi->s_2apbshift;
1247         uspi->s_3apb = 1 << uspi->s_3apbshift;
1248         uspi->s_apbmask = uspi->s_apb - 1;
1249         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1250         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1251         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1252         uspi->s_bpf = uspi->s_fsize << 3;
1253         uspi->s_bpfshift = uspi->s_fshift + 3;
1254         uspi->s_bpfmask = uspi->s_bpf - 1;
1255         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1256             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1257                 uspi->s_maxsymlinklen =
1258                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1259
1260         if (uspi->fs_magic == UFS2_MAGIC)
1261                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1262         else
1263                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1264         if (uspi->s_maxsymlinklen > maxsymlen) {
1265                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1266                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1267                 uspi->s_maxsymlinklen = maxsymlen;
1268         }
1269         sb->s_maxbytes = ufs_max_bytes(sb);
1270         sb->s_max_links = UFS_LINK_MAX;
1271
1272         inode = ufs_iget(sb, UFS_ROOTINO);
1273         if (IS_ERR(inode)) {
1274                 ret = PTR_ERR(inode);
1275                 goto failed;
1276         }
1277         sb->s_root = d_make_root(inode);
1278         if (!sb->s_root) {
1279                 ret = -ENOMEM;
1280                 goto failed;
1281         }
1282
1283         ufs_setup_cstotal(sb);
1284         /*
1285          * Read cylinder group structures
1286          */
1287         if (!sb_rdonly(sb))
1288                 if (!ufs_read_cylinder_structures(sb))
1289                         goto failed;
1290
1291         UFSD("EXIT\n");
1292         return 0;
1293
1294 failed:
1295         if (ubh)
1296                 ubh_brelse_uspi (uspi);
1297         kfree (uspi);
1298         kfree(sbi);
1299         sb->s_fs_info = NULL;
1300         UFSD("EXIT (FAILED)\n");
1301         return ret;
1302
1303 failed_nomem:
1304         UFSD("EXIT (NOMEM)\n");
1305         return -ENOMEM;
1306 }
1307
1308 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1309 {
1310         struct ufs_sb_private_info * uspi;
1311         struct ufs_super_block_first * usb1;
1312         struct ufs_super_block_third * usb3;
1313         unsigned new_mount_opt, ufstype;
1314         unsigned flags;
1315
1316         sync_filesystem(sb);
1317         mutex_lock(&UFS_SB(sb)->s_lock);
1318         uspi = UFS_SB(sb)->s_uspi;
1319         flags = UFS_SB(sb)->s_flags;
1320         usb1 = ubh_get_usb_first(uspi);
1321         usb3 = ubh_get_usb_third(uspi);
1322
1323         /*
1324          * Allow the "check" option to be passed as a remount option.
1325          * It is not possible to change ufstype option during remount
1326          */
1327         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1328         new_mount_opt = 0;
1329         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1330         if (!ufs_parse_options (data, &new_mount_opt)) {
1331                 mutex_unlock(&UFS_SB(sb)->s_lock);
1332                 return -EINVAL;
1333         }
1334         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1335                 new_mount_opt |= ufstype;
1336         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1337                 pr_err("ufstype can't be changed during remount\n");
1338                 mutex_unlock(&UFS_SB(sb)->s_lock);
1339                 return -EINVAL;
1340         }
1341
1342         if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) {
1343                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1344                 mutex_unlock(&UFS_SB(sb)->s_lock);
1345                 return 0;
1346         }
1347
1348         /*
1349          * fs was mouted as rw, remounting ro
1350          */
1351         if (*mount_flags & SB_RDONLY) {
1352                 ufs_put_super_internal(sb);
1353                 usb1->fs_time = ufs_get_seconds(sb);
1354                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1355                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1356                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1357                         ufs_set_fs_state(sb, usb1, usb3,
1358                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1359                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1360                 sb->s_flags |= SB_RDONLY;
1361         } else {
1362         /*
1363          * fs was mounted as ro, remounting rw
1364          */
1365 #ifndef CONFIG_UFS_FS_WRITE
1366                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1367                 mutex_unlock(&UFS_SB(sb)->s_lock);
1368                 return -EINVAL;
1369 #else
1370                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1371                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1372                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1373                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1374                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1375                         pr_err("this ufstype is read-only supported\n");
1376                         mutex_unlock(&UFS_SB(sb)->s_lock);
1377                         return -EINVAL;
1378                 }
1379                 if (!ufs_read_cylinder_structures(sb)) {
1380                         pr_err("failed during remounting\n");
1381                         mutex_unlock(&UFS_SB(sb)->s_lock);
1382                         return -EPERM;
1383                 }
1384                 sb->s_flags &= ~SB_RDONLY;
1385 #endif
1386         }
1387         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1388         mutex_unlock(&UFS_SB(sb)->s_lock);
1389         return 0;
1390 }
1391
1392 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1393 {
1394         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1395         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1396         const struct match_token *tp = tokens;
1397
1398         while (tp->token != Opt_onerror_panic && tp->token != mval)
1399                 ++tp;
1400         BUG_ON(tp->token == Opt_onerror_panic);
1401         seq_printf(seq, ",%s", tp->pattern);
1402
1403         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1404         while (tp->token != Opt_err && tp->token != mval)
1405                 ++tp;
1406         BUG_ON(tp->token == Opt_err);
1407         seq_printf(seq, ",%s", tp->pattern);
1408
1409         return 0;
1410 }
1411
1412 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1413 {
1414         struct super_block *sb = dentry->d_sb;
1415         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1416         unsigned  flags = UFS_SB(sb)->s_flags;
1417         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1418
1419         mutex_lock(&UFS_SB(sb)->s_lock);
1420
1421         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1422                 buf->f_type = UFS2_MAGIC;
1423         else
1424                 buf->f_type = UFS_MAGIC;
1425
1426         buf->f_blocks = uspi->s_dsize;
1427         buf->f_bfree = ufs_freefrags(uspi);
1428         buf->f_ffree = uspi->cs_total.cs_nifree;
1429         buf->f_bsize = sb->s_blocksize;
1430         buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1431                 ? (buf->f_bfree - uspi->s_root_blocks) : 0;
1432         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1433         buf->f_namelen = UFS_MAXNAMLEN;
1434         buf->f_fsid = u64_to_fsid(id);
1435
1436         mutex_unlock(&UFS_SB(sb)->s_lock);
1437
1438         return 0;
1439 }
1440
1441 static struct kmem_cache * ufs_inode_cachep;
1442
1443 static struct inode *ufs_alloc_inode(struct super_block *sb)
1444 {
1445         struct ufs_inode_info *ei;
1446
1447         ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1448         if (!ei)
1449                 return NULL;
1450
1451         inode_set_iversion(&ei->vfs_inode, 1);
1452         seqlock_init(&ei->meta_lock);
1453         mutex_init(&ei->truncate_mutex);
1454         return &ei->vfs_inode;
1455 }
1456
1457 static void ufs_free_in_core_inode(struct inode *inode)
1458 {
1459         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1460 }
1461
1462 static void init_once(void *foo)
1463 {
1464         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1465
1466         inode_init_once(&ei->vfs_inode);
1467 }
1468
1469 static int __init init_inodecache(void)
1470 {
1471         ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
1472                                 sizeof(struct ufs_inode_info), 0,
1473                                 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
1474                                         SLAB_ACCOUNT),
1475                                 offsetof(struct ufs_inode_info, i_u1.i_symlink),
1476                                 sizeof_field(struct ufs_inode_info,
1477                                         i_u1.i_symlink),
1478                                 init_once);
1479         if (ufs_inode_cachep == NULL)
1480                 return -ENOMEM;
1481         return 0;
1482 }
1483
1484 static void destroy_inodecache(void)
1485 {
1486         /*
1487          * Make sure all delayed rcu free inodes are flushed before we
1488          * destroy cache.
1489          */
1490         rcu_barrier();
1491         kmem_cache_destroy(ufs_inode_cachep);
1492 }
1493
1494 static const struct super_operations ufs_super_ops = {
1495         .alloc_inode    = ufs_alloc_inode,
1496         .free_inode     = ufs_free_in_core_inode,
1497         .write_inode    = ufs_write_inode,
1498         .evict_inode    = ufs_evict_inode,
1499         .put_super      = ufs_put_super,
1500         .sync_fs        = ufs_sync_fs,
1501         .statfs         = ufs_statfs,
1502         .remount_fs     = ufs_remount,
1503         .show_options   = ufs_show_options,
1504 };
1505
1506 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1507         int flags, const char *dev_name, void *data)
1508 {
1509         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1510 }
1511
1512 static struct file_system_type ufs_fs_type = {
1513         .owner          = THIS_MODULE,
1514         .name           = "ufs",
1515         .mount          = ufs_mount,
1516         .kill_sb        = kill_block_super,
1517         .fs_flags       = FS_REQUIRES_DEV,
1518 };
1519 MODULE_ALIAS_FS("ufs");
1520
1521 static int __init init_ufs_fs(void)
1522 {
1523         int err = init_inodecache();
1524         if (err)
1525                 goto out1;
1526         err = register_filesystem(&ufs_fs_type);
1527         if (err)
1528                 goto out;
1529         return 0;
1530 out:
1531         destroy_inodecache();
1532 out1:
1533         return err;
1534 }
1535
1536 static void __exit exit_ufs_fs(void)
1537 {
1538         unregister_filesystem(&ufs_fs_type);
1539         destroy_inodecache();
1540 }
1541
1542 module_init(init_ufs_fs)
1543 module_exit(exit_ufs_fs)
1544 MODULE_LICENSE("GPL");