fs/ufs/super.c

   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <gwingerde@gmail.com>
  45  *
  46  * Clean swab support on 19970406 by
  47  * Francois-Rene Rideau <fare@tunes.org>
  48  *
  49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52  *
  53  * NeXTstep support added on February 5th 1998 by
  54  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55  *
  56  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57  *
  58  * HP/UX hfs filesystem support added by
  59  * Martin K. Petersen <mkp@mkp.net>, August 1999
  60  *
  61  * UFS2 (of FreeBSD 5.x) support added by
  62  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63  *
  64  * UFS2 write support added by
  65  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  66  */
  67
  68 #include <linux/exportfs.h>
  69 #include <linux/module.h>
  70 #include <linux/bitops.h>
  71
  72 #include <stdarg.h>
  73
  74 #include <linux/uaccess.h>
  75
  76 #include <linux/errno.h>
  77 #include <linux/fs.h>
  78 #include <linux/slab.h>
  79 #include <linux/time.h>
  80 #include <linux/stat.h>
  81 #include <linux/string.h>
  82 #include <linux/blkdev.h>
  83 #include <linux/backing-dev.h>
  84 #include <linux/init.h>
  85 #include <linux/parser.h>
  86 #include <linux/buffer_head.h>
  87 #include <linux/vfs.h>
  88 #include <linux/log2.h>
  89 #include <linux/mount.h>
  90 #include <linux/seq_file.h>
  91
  92 #include "ufs_fs.h"
  93 #include "ufs.h"
  94 #include "swab.h"
  95 #include "util.h"
  96
  97 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
  98 {
  99         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 100         struct inode *inode;
 101
 102         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 103                 return ERR_PTR(-ESTALE);
 104
 105         inode = ufs_iget(sb, ino);
 106         if (IS_ERR(inode))
 107                 return ERR_CAST(inode);
 108         if (generation && inode->i_generation != generation) {
 109                 iput(inode);
 110                 return ERR_PTR(-ESTALE);
 111         }
 112         return inode;
 113 }
 114
 115 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 116                                        int fh_len, int fh_type)
 117 {
 118         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 119 }
 120
 121 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 122                                        int fh_len, int fh_type)
 123 {
 124         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 125 }
 126
 127 static struct dentry *ufs_get_parent(struct dentry *child)
 128 {
 129         struct qstr dot_dot = QSTR_INIT("..", 2);
 130         ino_t ino;
 131
 132         ino = ufs_inode_by_name(d_inode(child), &dot_dot);
 133         if (!ino)
 134                 return ERR_PTR(-ENOENT);
 135         return d_obtain_alias(ufs_iget(child->d_sb, ino));
 136 }
 137
 138 static const struct export_operations ufs_export_ops = {
 139         .fh_to_dentry   = ufs_fh_to_dentry,
 140         .fh_to_parent   = ufs_fh_to_parent,
 141         .get_parent     = ufs_get_parent,
 142 };
 143
 144 #ifdef CONFIG_UFS_DEBUG
 145 /*
 146  * Print contents of ufs_super_block, useful for debugging
 147  */
 148 static void ufs_print_super_stuff(struct super_block *sb,
 149                                   struct ufs_super_block_first *usb1,
 150                                   struct ufs_super_block_second *usb2,
 151                                   struct ufs_super_block_third *usb3)
 152 {
 153         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 154
 155         pr_debug("ufs_print_super_stuff\n");
 156         pr_debug("  magic:     0x%x\n", magic);
 157         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 158                 pr_debug("  fs_size:   %llu\n", (unsigned long long)
 159                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 160                 pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
 161                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 162                 pr_debug("  bsize:         %u\n",
 163                          fs32_to_cpu(sb, usb1->fs_bsize));
 164                 pr_debug("  fsize:         %u\n",
 165                          fs32_to_cpu(sb, usb1->fs_fsize));
 166                 pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 167                 pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
 168                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 169                 pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 170                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 171                 pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
 172                          (unsigned long long)
 173                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 174                 pr_info("  cs_nifree(Num of free inodes): %llu\n",
 175                         (unsigned long long)
 176                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 177                 pr_info("  cs_nffree(Num of free frags): %llu\n",
 178                         (unsigned long long)
 179                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 180                 pr_info("  fs_maxsymlinklen: %u\n",
 181                         fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 182         } else {
 183                 pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 184                 pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 185                 pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 186                 pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 187                 pr_debug(" cgoffset:    %u\n",
 188                          fs32_to_cpu(sb, usb1->fs_cgoffset));
 189                 pr_debug(" ~cgmask:     0x%x\n",
 190                          ~fs32_to_cpu(sb, usb1->fs_cgmask));
 191                 pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 192                 pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 193                 pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 194                 pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 195                 pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 196                 pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 197                 pr_debug(" fragshift:   %u\n",
 198                          fs32_to_cpu(sb, usb1->fs_fragshift));
 199                 pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 200                 pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 201                 pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 202                 pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 203                 pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 204                 pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 205                 pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 206                 pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 207                 pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 208                 pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 209                 pr_debug(" fstodb:      %u\n",
 210                          fs32_to_cpu(sb, usb1->fs_fsbtodb));
 211                 pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 212                 pr_debug(" ndir         %u\n",
 213                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 214                 pr_debug(" nifree       %u\n",
 215                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 216                 pr_debug(" nbfree       %u\n",
 217                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 218                 pr_debug(" nffree       %u\n",
 219                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 220         }
 221         pr_debug("\n");
 222 }
 223
 224 /*
 225  * Print contents of ufs_cylinder_group, useful for debugging
 226  */
 227 static void ufs_print_cylinder_stuff(struct super_block *sb,
 228                                      struct ufs_cylinder_group *cg)
 229 {
 230         pr_debug("\nufs_print_cylinder_stuff\n");
 231         pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 232         pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 233         pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 234         pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 235         pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 236         pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 237         pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 238         pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 239         pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 240         pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 241         pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 242         pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 243         pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 244         pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 245         pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 246             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 247             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 248             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 249             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 250         pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 251         pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 252         pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 253         pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 254         pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 255         pr_debug("  clustersumoff %u\n",
 256                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 257         pr_debug("  clusteroff    %u\n",
 258                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 259         pr_debug("  nclusterblks  %u\n",
 260                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 261         pr_debug("\n");
 262 }
 263 #else
 264 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 265 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 266 #endif /* CONFIG_UFS_DEBUG */
 267
 268 static const struct super_operations ufs_super_ops;
 269
 270 void ufs_error (struct super_block * sb, const char * function,
 271         const char * fmt, ...)
 272 {
 273         struct ufs_sb_private_info * uspi;
 274         struct ufs_super_block_first * usb1;
 275         struct va_format vaf;
 276         va_list args;
 277
 278         uspi = UFS_SB(sb)->s_uspi;
 279         usb1 = ubh_get_usb_first(uspi);
 280
 281         if (!sb_rdonly(sb)) {
 282                 usb1->fs_clean = UFS_FSBAD;
 283                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 284                 ufs_mark_sb_dirty(sb);
 285                 sb->s_flags |= MS_RDONLY;
 286         }
 287         va_start(args, fmt);
 288         vaf.fmt = fmt;
 289         vaf.va = &args;
 290         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 291         case UFS_MOUNT_ONERROR_PANIC:
 292                 panic("panic (device %s): %s: %pV\n",
 293                       sb->s_id, function, &vaf);
 294
 295         case UFS_MOUNT_ONERROR_LOCK:
 296         case UFS_MOUNT_ONERROR_UMOUNT:
 297         case UFS_MOUNT_ONERROR_REPAIR:
 298                 pr_crit("error (device %s): %s: %pV\n",
 299                         sb->s_id, function, &vaf);
 300         }
 301         va_end(args);
 302 }
 303
 304 void ufs_panic (struct super_block * sb, const char * function,
 305         const char * fmt, ...)
 306 {
 307         struct ufs_sb_private_info * uspi;
 308         struct ufs_super_block_first * usb1;
 309         struct va_format vaf;
 310         va_list args;
 311
 312         uspi = UFS_SB(sb)->s_uspi;
 313         usb1 = ubh_get_usb_first(uspi);
 314
 315         if (!sb_rdonly(sb)) {
 316                 usb1->fs_clean = UFS_FSBAD;
 317                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 318                 ufs_mark_sb_dirty(sb);
 319         }
 320         va_start(args, fmt);
 321         vaf.fmt = fmt;
 322         vaf.va = &args;
 323         sb->s_flags |= MS_RDONLY;
 324         pr_crit("panic (device %s): %s: %pV\n",
 325                 sb->s_id, function, &vaf);
 326         va_end(args);
 327 }
 328
 329 void ufs_warning (struct super_block * sb, const char * function,
 330         const char * fmt, ...)
 331 {
 332         struct va_format vaf;
 333         va_list args;
 334
 335         va_start(args, fmt);
 336         vaf.fmt = fmt;
 337         vaf.va = &args;
 338         pr_warn("(device %s): %s: %pV\n",
 339                 sb->s_id, function, &vaf);
 340         va_end(args);
 341 }
 342
 343 enum {
 344        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 345        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 346        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 347        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 348        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 349        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 350        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 351        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 352        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 353        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 354        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 355        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 356        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 357        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 358        Opt_err
 359 };
 360
 361 static const match_table_t tokens = {
 362         {Opt_type_old, "ufstype=old"},
 363         {Opt_type_sunx86, "ufstype=sunx86"},
 364         {Opt_type_sun, "ufstype=sun"},
 365         {Opt_type_sunos, "ufstype=sunos"},
 366         {Opt_type_44bsd, "ufstype=44bsd"},
 367         {Opt_type_ufs2, "ufstype=ufs2"},
 368         {Opt_type_ufs2, "ufstype=5xbsd"},
 369         {Opt_type_hp, "ufstype=hp"},
 370         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 371         {Opt_type_nextstep, "ufstype=nextstep"},
 372         {Opt_type_openstep, "ufstype=openstep"},
 373 /*end of possible ufs types */
 374         {Opt_onerror_panic, "onerror=panic"},
 375         {Opt_onerror_lock, "onerror=lock"},
 376         {Opt_onerror_umount, "onerror=umount"},
 377         {Opt_onerror_repair, "onerror=repair"},
 378         {Opt_err, NULL}
 379 };
 380
 381 static int ufs_parse_options (char * options, unsigned * mount_options)
 382 {
 383         char * p;
 384
 385         UFSD("ENTER\n");
 386
 387         if (!options)
 388                 return 1;
 389
 390         while ((p = strsep(&options, ",")) != NULL) {
 391                 substring_t args[MAX_OPT_ARGS];
 392                 int token;
 393                 if (!*p)
 394                         continue;
 395
 396                 token = match_token(p, tokens, args);
 397                 switch (token) {
 398                 case Opt_type_old:
 399                         ufs_clear_opt (*mount_options, UFSTYPE);
 400                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 401                         break;
 402                 case Opt_type_sunx86:
 403                         ufs_clear_opt (*mount_options, UFSTYPE);
 404                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 405                         break;
 406                 case Opt_type_sun:
 407                         ufs_clear_opt (*mount_options, UFSTYPE);
 408                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 409                         break;
 410                 case Opt_type_sunos:
 411                         ufs_clear_opt(*mount_options, UFSTYPE);
 412                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 413                         break;
 414                 case Opt_type_44bsd:
 415                         ufs_clear_opt (*mount_options, UFSTYPE);
 416                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 417                         break;
 418                 case Opt_type_ufs2:
 419                         ufs_clear_opt(*mount_options, UFSTYPE);
 420                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 421                         break;
 422                 case Opt_type_hp:
 423                         ufs_clear_opt (*mount_options, UFSTYPE);
 424                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 425                         break;
 426                 case Opt_type_nextstepcd:
 427                         ufs_clear_opt (*mount_options, UFSTYPE);
 428                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 429                         break;
 430                 case Opt_type_nextstep:
 431                         ufs_clear_opt (*mount_options, UFSTYPE);
 432                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 433                         break;
 434                 case Opt_type_openstep:
 435                         ufs_clear_opt (*mount_options, UFSTYPE);
 436                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 437                         break;
 438                 case Opt_onerror_panic:
 439                         ufs_clear_opt (*mount_options, ONERROR);
 440                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 441                         break;
 442                 case Opt_onerror_lock:
 443                         ufs_clear_opt (*mount_options, ONERROR);
 444                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 445                         break;
 446                 case Opt_onerror_umount:
 447                         ufs_clear_opt (*mount_options, ONERROR);
 448                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 449                         break;
 450                 case Opt_onerror_repair:
 451                         pr_err("Unable to do repair on error, will lock lock instead\n");
 452                         ufs_clear_opt (*mount_options, ONERROR);
 453                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 454                         break;
 455                 default:
 456                         pr_err("Invalid option: \"%s\" or missing value\n", p);
 457                         return 0;
 458                 }
 459         }
 460         return 1;
 461 }
 462
 463 /*
 464  * Different types of UFS hold fs_cstotal in different
 465  * places, and use different data structure for it.
 466  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
 467  */
 468 static void ufs_setup_cstotal(struct super_block *sb)
 469 {
 470         struct ufs_sb_info *sbi = UFS_SB(sb);
 471         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 472         struct ufs_super_block_first *usb1;
 473         struct ufs_super_block_second *usb2;
 474         struct ufs_super_block_third *usb3;
 475         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 476
 477         UFSD("ENTER, mtype=%u\n", mtype);
 478         usb1 = ubh_get_usb_first(uspi);
 479         usb2 = ubh_get_usb_second(uspi);
 480         usb3 = ubh_get_usb_third(uspi);
 481
 482         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 483              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) ||
 484             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 485                 /*we have statistic in different place, then usual*/
 486                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 487                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 488                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 489                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 490         } else {
 491                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 492                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 493                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 494                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 495         }
 496         UFSD("EXIT\n");
 497 }
 498
 499 /*
 500  * Read on-disk structures associated with cylinder groups
 501  */
 502 static int ufs_read_cylinder_structures(struct super_block *sb)
 503 {
 504         struct ufs_sb_info *sbi = UFS_SB(sb);
 505         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 506         struct ufs_buffer_head * ubh;
 507         unsigned char * base, * space;
 508         unsigned size, blks, i;
 509
 510         UFSD("ENTER\n");
 511
 512         /*
 513          * Read cs structures from (usually) first data block
 514          * on the device.
 515          */
 516         size = uspi->s_cssize;
 517         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 518         base = space = kmalloc(size, GFP_NOFS);
 519         if (!base)
 520                 goto failed;
 521         sbi->s_csp = (struct ufs_csum *)space;
 522         for (i = 0; i < blks; i += uspi->s_fpb) {
 523                 size = uspi->s_bsize;
 524                 if (i + uspi->s_fpb > blks)
 525                         size = (blks - i) * uspi->s_fsize;
 526
 527                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 528
 529                 if (!ubh)
 530                         goto failed;
 531
 532                 ubh_ubhcpymem (space, ubh, size);
 533
 534                 space += size;
 535                 ubh_brelse (ubh);
 536                 ubh = NULL;
 537         }
 538
 539         /*
 540          * Read cylinder group (we read only first fragment from block
 541          * at this time) and prepare internal data structures for cg caching.
 542          */
 543         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
 544                 goto failed;
 545         for (i = 0; i < uspi->s_ncg; i++)
 546                 sbi->s_ucg[i] = NULL;
 547         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 548                 sbi->s_ucpi[i] = NULL;
 549                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 550         }
 551         for (i = 0; i < uspi->s_ncg; i++) {
 552                 UFSD("read cg %u\n", i);
 553                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 554                         goto failed;
 555                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 556                         goto failed;
 557
 558                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 559         }
 560         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 561                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
 562                         goto failed;
 563                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 564         }
 565         sbi->s_cg_loaded = 0;
 566         UFSD("EXIT\n");
 567         return 1;
 568
 569 failed:
 570         kfree (base);
 571         if (sbi->s_ucg) {
 572                 for (i = 0; i < uspi->s_ncg; i++)
 573                         if (sbi->s_ucg[i])
 574                                 brelse (sbi->s_ucg[i]);
 575                 kfree (sbi->s_ucg);
 576                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 577                         kfree (sbi->s_ucpi[i]);
 578         }
 579         UFSD("EXIT (FAILED)\n");
 580         return 0;
 581 }
 582
 583 /*
 584  * Sync our internal copy of fs_cstotal with disk
 585  */
 586 static void ufs_put_cstotal(struct super_block *sb)
 587 {
 588         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 589         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 590         struct ufs_super_block_first *usb1;
 591         struct ufs_super_block_second *usb2;
 592         struct ufs_super_block_third *usb3;
 593
 594         UFSD("ENTER\n");
 595         usb1 = ubh_get_usb_first(uspi);
 596         usb2 = ubh_get_usb_second(uspi);
 597         usb3 = ubh_get_usb_third(uspi);
 598
 599         if (mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 600                 /*we have statistic in different place, then usual*/
 601                 usb2->fs_un.fs_u2.cs_ndir =
 602                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 603                 usb2->fs_un.fs_u2.cs_nbfree =
 604                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 605                 usb3->fs_un1.fs_u2.cs_nifree =
 606                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 607                 usb3->fs_un1.fs_u2.cs_nffree =
 608                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 609                 goto out;
 610         }
 611
 612         if (mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 613              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) {
 614                 /* store stats in both old and new places */
 615                 usb2->fs_un.fs_u2.cs_ndir =
 616                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 617                 usb2->fs_un.fs_u2.cs_nbfree =
 618                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 619                 usb3->fs_un1.fs_u2.cs_nifree =
 620                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 621                 usb3->fs_un1.fs_u2.cs_nffree =
 622                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 623         }
 624         usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 625         usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 626         usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 627         usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 628 out:
 629         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 630         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 631         UFSD("EXIT\n");
 632 }
 633
 634 /**
 635  * ufs_put_super_internal() - put on-disk intrenal structures
 636  * @sb: pointer to super_block structure
 637  * Put on-disk structures associated with cylinder groups
 638  * and write them back to disk, also update cs_total on disk
 639  */
 640 static void ufs_put_super_internal(struct super_block *sb)
 641 {
 642         struct ufs_sb_info *sbi = UFS_SB(sb);
 643         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 644         struct ufs_buffer_head * ubh;
 645         unsigned char * base, * space;
 646         unsigned blks, size, i;
 647
 648
 649         UFSD("ENTER\n");
 650
 651         ufs_put_cstotal(sb);
 652         size = uspi->s_cssize;
 653         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 654         base = space = (char*) sbi->s_csp;
 655         for (i = 0; i < blks; i += uspi->s_fpb) {
 656                 size = uspi->s_bsize;
 657                 if (i + uspi->s_fpb > blks)
 658                         size = (blks - i) * uspi->s_fsize;
 659
 660                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 661
 662                 ubh_memcpyubh (ubh, space, size);
 663                 space += size;
 664                 ubh_mark_buffer_uptodate (ubh, 1);
 665                 ubh_mark_buffer_dirty (ubh);
 666                 ubh_brelse (ubh);
 667         }
 668         for (i = 0; i < sbi->s_cg_loaded; i++) {
 669                 ufs_put_cylinder (sb, i);
 670                 kfree (sbi->s_ucpi[i]);
 671         }
 672         for (; i < UFS_MAX_GROUP_LOADED; i++)
 673                 kfree (sbi->s_ucpi[i]);
 674         for (i = 0; i < uspi->s_ncg; i++)
 675                 brelse (sbi->s_ucg[i]);
 676         kfree (sbi->s_ucg);
 677         kfree (base);
 678
 679         UFSD("EXIT\n");
 680 }
 681
 682 static int ufs_sync_fs(struct super_block *sb, int wait)
 683 {
 684         struct ufs_sb_private_info * uspi;
 685         struct ufs_super_block_first * usb1;
 686         struct ufs_super_block_third * usb3;
 687         unsigned flags;
 688
 689         mutex_lock(&UFS_SB(sb)->s_lock);
 690
 691         UFSD("ENTER\n");
 692
 693         flags = UFS_SB(sb)->s_flags;
 694         uspi = UFS_SB(sb)->s_uspi;
 695         usb1 = ubh_get_usb_first(uspi);
 696         usb3 = ubh_get_usb_third(uspi);
 697
 698         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
 699         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
 700             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 701             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 702                 ufs_set_fs_state(sb, usb1, usb3,
 703                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 704         ufs_put_cstotal(sb);
 705
 706         UFSD("EXIT\n");
 707         mutex_unlock(&UFS_SB(sb)->s_lock);
 708
 709         return 0;
 710 }
 711
 712 static void delayed_sync_fs(struct work_struct *work)
 713 {
 714         struct ufs_sb_info *sbi;
 715
 716         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
 717
 718         spin_lock(&sbi->work_lock);
 719         sbi->work_queued = 0;
 720         spin_unlock(&sbi->work_lock);
 721
 722         ufs_sync_fs(sbi->sb, 1);
 723 }
 724
 725 void ufs_mark_sb_dirty(struct super_block *sb)
 726 {
 727         struct ufs_sb_info *sbi = UFS_SB(sb);
 728         unsigned long delay;
 729
 730         spin_lock(&sbi->work_lock);
 731         if (!sbi->work_queued) {
 732                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
 733                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
 734                 sbi->work_queued = 1;
 735         }
 736         spin_unlock(&sbi->work_lock);
 737 }
 738
 739 static void ufs_put_super(struct super_block *sb)
 740 {
 741         struct ufs_sb_info * sbi = UFS_SB(sb);
 742
 743         UFSD("ENTER\n");
 744
 745         if (!sb_rdonly(sb))
 746                 ufs_put_super_internal(sb);
 747         cancel_delayed_work_sync(&sbi->sync_work);
 748
 749         ubh_brelse_uspi (sbi->s_uspi);
 750         kfree (sbi->s_uspi);
 751         kfree (sbi);
 752         sb->s_fs_info = NULL;
 753         UFSD("EXIT\n");
 754         return;
 755 }
 756
 757 static u64 ufs_max_bytes(struct super_block *sb)
 758 {
 759         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 760         int bits = uspi->s_apbshift;
 761         u64 res;
 762
 763         if (bits > 21)
 764                 res = ~0ULL;
 765         else
 766                 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
 767                         (1LL << (3*bits));
 768
 769         if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
 770                 return MAX_LFS_FILESIZE;
 771         return res << uspi->s_bshift;
 772 }
 773
 774 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 775 {
 776         struct ufs_sb_info * sbi;
 777         struct ufs_sb_private_info * uspi;
 778         struct ufs_super_block_first * usb1;
 779         struct ufs_super_block_second * usb2;
 780         struct ufs_super_block_third * usb3;
 781         struct ufs_buffer_head * ubh;
 782         struct inode *inode;
 783         unsigned block_size, super_block_size;
 784         unsigned flags;
 785         unsigned super_block_offset;
 786         unsigned maxsymlen;
 787         int ret = -EINVAL;
 788
 789         uspi = NULL;
 790         ubh = NULL;
 791         flags = 0;
 792
 793         UFSD("ENTER\n");
 794
 795 #ifndef CONFIG_UFS_FS_WRITE
 796         if (!sb_rdonly(sb)) {
 797                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 798                 return -EROFS;
 799         }
 800 #endif
 801
 802         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 803         if (!sbi)
 804                 goto failed_nomem;
 805         sb->s_fs_info = sbi;
 806         sbi->sb = sb;
 807
 808         UFSD("flag %u\n", (int)(sb_rdonly(sb)));
 809
 810         mutex_init(&sbi->s_lock);
 811         spin_lock_init(&sbi->work_lock);
 812         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
 813         /*
 814          * Set default mount options
 815          * Parse mount options
 816          */
 817         sbi->s_mount_opt = 0;
 818         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 819         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 820                 pr_err("wrong mount options\n");
 821                 goto failed;
 822         }
 823         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 824                 if (!silent)
 825                         pr_err("You didn't specify the type of your ufs filesystem\n\n"
 826                         "mount -t ufs -o ufstype="
 827                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 828                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 829                         "default is ufstype=old\n");
 830                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 831         }
 832
 833         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 834         sbi->s_uspi = uspi;
 835         if (!uspi)
 836                 goto failed;
 837         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 838         super_block_offset=UFS_SBLOCK;
 839
 840         sb->s_maxbytes = MAX_LFS_FILESIZE;
 841
 842         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 843         case UFS_MOUNT_UFSTYPE_44BSD:
 844                 UFSD("ufstype=44bsd\n");
 845                 uspi->s_fsize = block_size = 512;
 846                 uspi->s_fmask = ~(512 - 1);
 847                 uspi->s_fshift = 9;
 848                 uspi->s_sbsize = super_block_size = 1536;
 849                 uspi->s_sbbase = 0;
 850                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 851                 break;
 852         case UFS_MOUNT_UFSTYPE_UFS2:
 853                 UFSD("ufstype=ufs2\n");
 854                 super_block_offset=SBLOCK_UFS2;
 855                 uspi->s_fsize = block_size = 512;
 856                 uspi->s_fmask = ~(512 - 1);
 857                 uspi->s_fshift = 9;
 858                 uspi->s_sbsize = super_block_size = 1536;
 859                 uspi->s_sbbase =  0;
 860                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 861                 break;
 862
 863         case UFS_MOUNT_UFSTYPE_SUN:
 864                 UFSD("ufstype=sun\n");
 865                 uspi->s_fsize = block_size = 1024;
 866                 uspi->s_fmask = ~(1024 - 1);
 867                 uspi->s_fshift = 10;
 868                 uspi->s_sbsize = super_block_size = 2048;
 869                 uspi->s_sbbase = 0;
 870                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 871                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 872                 break;
 873
 874         case UFS_MOUNT_UFSTYPE_SUNOS:
 875                 UFSD("ufstype=sunos\n");
 876                 uspi->s_fsize = block_size = 1024;
 877                 uspi->s_fmask = ~(1024 - 1);
 878                 uspi->s_fshift = 10;
 879                 uspi->s_sbsize = 2048;
 880                 super_block_size = 2048;
 881                 uspi->s_sbbase = 0;
 882                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 883                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 884                 break;
 885
 886         case UFS_MOUNT_UFSTYPE_SUNx86:
 887                 UFSD("ufstype=sunx86\n");
 888                 uspi->s_fsize = block_size = 1024;
 889                 uspi->s_fmask = ~(1024 - 1);
 890                 uspi->s_fshift = 10;
 891                 uspi->s_sbsize = super_block_size = 2048;
 892                 uspi->s_sbbase = 0;
 893                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 894                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 895                 break;
 896
 897         case UFS_MOUNT_UFSTYPE_OLD:
 898                 UFSD("ufstype=old\n");
 899                 uspi->s_fsize = block_size = 1024;
 900                 uspi->s_fmask = ~(1024 - 1);
 901                 uspi->s_fshift = 10;
 902                 uspi->s_sbsize = super_block_size = 2048;
 903                 uspi->s_sbbase = 0;
 904                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 905                 if (!sb_rdonly(sb)) {
 906                         if (!silent)
 907                                 pr_info("ufstype=old is supported read-only\n");
 908                         sb->s_flags |= MS_RDONLY;
 909                 }
 910                 break;
 911
 912         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 913                 UFSD("ufstype=nextstep\n");
 914                 uspi->s_fsize = block_size = 1024;
 915                 uspi->s_fmask = ~(1024 - 1);
 916                 uspi->s_fshift = 10;
 917                 uspi->s_sbsize = super_block_size = 2048;
 918                 uspi->s_sbbase = 0;
 919                 uspi->s_dirblksize = 1024;
 920                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 921                 if (!sb_rdonly(sb)) {
 922                         if (!silent)
 923                                 pr_info("ufstype=nextstep is supported read-only\n");
 924                         sb->s_flags |= MS_RDONLY;
 925                 }
 926                 break;
 927
 928         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 929                 UFSD("ufstype=nextstep-cd\n");
 930                 uspi->s_fsize = block_size = 2048;
 931                 uspi->s_fmask = ~(2048 - 1);
 932                 uspi->s_fshift = 11;
 933                 uspi->s_sbsize = super_block_size = 2048;
 934                 uspi->s_sbbase = 0;
 935                 uspi->s_dirblksize = 1024;
 936                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 937                 if (!sb_rdonly(sb)) {
 938                         if (!silent)
 939                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
 940                         sb->s_flags |= MS_RDONLY;
 941                 }
 942                 break;
 943
 944         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 945                 UFSD("ufstype=openstep\n");
 946                 uspi->s_fsize = block_size = 1024;
 947                 uspi->s_fmask = ~(1024 - 1);
 948                 uspi->s_fshift = 10;
 949                 uspi->s_sbsize = super_block_size = 2048;
 950                 uspi->s_sbbase = 0;
 951                 uspi->s_dirblksize = 1024;
 952                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 953                 if (!sb_rdonly(sb)) {
 954                         if (!silent)
 955                                 pr_info("ufstype=openstep is supported read-only\n");
 956                         sb->s_flags |= MS_RDONLY;
 957                 }
 958                 break;
 959
 960         case UFS_MOUNT_UFSTYPE_HP:
 961                 UFSD("ufstype=hp\n");
 962                 uspi->s_fsize = block_size = 1024;
 963                 uspi->s_fmask = ~(1024 - 1);
 964                 uspi->s_fshift = 10;
 965                 uspi->s_sbsize = super_block_size = 2048;
 966                 uspi->s_sbbase = 0;
 967                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 968                 if (!sb_rdonly(sb)) {
 969                         if (!silent)
 970                                 pr_info("ufstype=hp is supported read-only\n");
 971                         sb->s_flags |= MS_RDONLY;
 972                 }
 973                 break;
 974         default:
 975                 if (!silent)
 976                         pr_err("unknown ufstype\n");
 977                 goto failed;
 978         }
 979
 980 again:
 981         if (!sb_set_blocksize(sb, block_size)) {
 982                 pr_err("failed to set blocksize\n");
 983                 goto failed;
 984         }
 985
 986         /*
 987          * read ufs super block from device
 988          */
 989
 990         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 991
 992         if (!ubh)
 993             goto failed;
 994
 995         usb1 = ubh_get_usb_first(uspi);
 996         usb2 = ubh_get_usb_second(uspi);
 997         usb3 = ubh_get_usb_third(uspi);
 998
 999         /* Sort out mod used on SunOS 4.1.3 for fs_state */
1000         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1001         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1002             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1003                 flags &= ~UFS_ST_MASK;
1004                 flags |=  UFS_ST_SUN;
1005         }
1006
1007         if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1008             uspi->s_postblformat == UFS_42POSTBLFMT) {
1009                 if (!silent)
1010                         pr_err("this is not a 44bsd filesystem");
1011                 goto failed;
1012         }
1013
1014         /*
1015          * Check ufs magic number
1016          */
1017         sbi->s_bytesex = BYTESEX_LE;
1018         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1019                 case UFS_MAGIC:
1020                 case UFS_MAGIC_BW:
1021                 case UFS2_MAGIC:
1022                 case UFS_MAGIC_LFN:
1023                 case UFS_MAGIC_FEA:
1024                 case UFS_MAGIC_4GB:
1025                         goto magic_found;
1026         }
1027         sbi->s_bytesex = BYTESEX_BE;
1028         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1029                 case UFS_MAGIC:
1030                 case UFS_MAGIC_BW:
1031                 case UFS2_MAGIC:
1032                 case UFS_MAGIC_LFN:
1033                 case UFS_MAGIC_FEA:
1034                 case UFS_MAGIC_4GB:
1035                         goto magic_found;
1036         }
1037
1038         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1039           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1040           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1041           && uspi->s_sbbase < 256) {
1042                 ubh_brelse_uspi(uspi);
1043                 ubh = NULL;
1044                 uspi->s_sbbase += 8;
1045                 goto again;
1046         }
1047         if (!silent)
1048                 pr_err("%s(): bad magic number\n", __func__);
1049         goto failed;
1050
1051 magic_found:
1052         /*
1053          * Check block and fragment sizes
1054          */
1055         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1056         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1057         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1058         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1059         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1060
1061         if (!is_power_of_2(uspi->s_fsize)) {
1062                 pr_err("%s(): fragment size %u is not a power of 2\n",
1063                        __func__, uspi->s_fsize);
1064                 goto failed;
1065         }
1066         if (uspi->s_fsize < 512) {
1067                 pr_err("%s(): fragment size %u is too small\n",
1068                        __func__, uspi->s_fsize);
1069                 goto failed;
1070         }
1071         if (uspi->s_fsize > 4096) {
1072                 pr_err("%s(): fragment size %u is too large\n",
1073                        __func__, uspi->s_fsize);
1074                 goto failed;
1075         }
1076         if (!is_power_of_2(uspi->s_bsize)) {
1077                 pr_err("%s(): block size %u is not a power of 2\n",
1078                        __func__, uspi->s_bsize);
1079                 goto failed;
1080         }
1081         if (uspi->s_bsize < 4096) {
1082                 pr_err("%s(): block size %u is too small\n",
1083                        __func__, uspi->s_bsize);
1084                 goto failed;
1085         }
1086         if (uspi->s_bsize / uspi->s_fsize > 8) {
1087                 pr_err("%s(): too many fragments per block (%u)\n",
1088                        __func__, uspi->s_bsize / uspi->s_fsize);
1089                 goto failed;
1090         }
1091         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1092                 ubh_brelse_uspi(uspi);
1093                 ubh = NULL;
1094                 block_size = uspi->s_fsize;
1095                 super_block_size = uspi->s_sbsize;
1096                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1097                 goto again;
1098         }
1099
1100         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1101         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1102
1103         /*
1104          * Check, if file system was correctly unmounted.
1105          * If not, make it read only.
1106          */
1107         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1108           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1109           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1110             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1111           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1112           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1113                 switch(usb1->fs_clean) {
1114                 case UFS_FSCLEAN:
1115                         UFSD("fs is clean\n");
1116                         break;
1117                 case UFS_FSSTABLE:
1118                         UFSD("fs is stable\n");
1119                         break;
1120                 case UFS_FSLOG:
1121                         UFSD("fs is logging fs\n");
1122                         break;
1123                 case UFS_FSOSF1:
1124                         UFSD("fs is DEC OSF/1\n");
1125                         break;
1126                 case UFS_FSACTIVE:
1127                         pr_err("%s(): fs is active\n", __func__);
1128                         sb->s_flags |= MS_RDONLY;
1129                         break;
1130                 case UFS_FSBAD:
1131                         pr_err("%s(): fs is bad\n", __func__);
1132                         sb->s_flags |= MS_RDONLY;
1133                         break;
1134                 default:
1135                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1136                                __func__, usb1->fs_clean);
1137                         sb->s_flags |= MS_RDONLY;
1138                         break;
1139                 }
1140         } else {
1141                 pr_err("%s(): fs needs fsck\n", __func__);
1142                 sb->s_flags |= MS_RDONLY;
1143         }
1144
1145         /*
1146          * Read ufs_super_block into internal data structures
1147          */
1148         sb->s_op = &ufs_super_ops;
1149         sb->s_export_op = &ufs_export_ops;
1150
1151         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1152
1153         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1154         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1155         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1156         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1157         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1158         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1159
1160         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1161                 uspi->s_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1162                 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1163         } else {
1164                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1165                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1166         }
1167
1168         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1169         /* s_bsize already set */
1170         /* s_fsize already set */
1171         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1172         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1173         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1174         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1175         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1176         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1177         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1178                 uspi->s_fshift);
1179         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1180         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1181         /* s_sbsize already set */
1182         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1183         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1184         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1185         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1186         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1187         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1188         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1189         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1190
1191         if (uspi->fs_magic == UFS2_MAGIC)
1192                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1193         else
1194                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1195
1196         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1197         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1198         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1199         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1200         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1201         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1202         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1203         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1204         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1205         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1206         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1207         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1208         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1209         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1210
1211         uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1212                                               uspi->s_minfree, 100);
1213         if (uspi->s_minfree <= 5) {
1214                 uspi->s_time_to_space = ~0ULL;
1215                 uspi->s_space_to_time = 0;
1216                 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1217         } else {
1218                 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1219                 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1220                                               uspi->s_minfree - 2, 100) - 1;
1221         }
1222
1223         /*
1224          * Compute another frequently used values
1225          */
1226         uspi->s_fpbmask = uspi->s_fpb - 1;
1227         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1228                 uspi->s_apbshift = uspi->s_bshift - 3;
1229         else
1230                 uspi->s_apbshift = uspi->s_bshift - 2;
1231
1232         uspi->s_2apbshift = uspi->s_apbshift * 2;
1233         uspi->s_3apbshift = uspi->s_apbshift * 3;
1234         uspi->s_apb = 1 << uspi->s_apbshift;
1235         uspi->s_2apb = 1 << uspi->s_2apbshift;
1236         uspi->s_3apb = 1 << uspi->s_3apbshift;
1237         uspi->s_apbmask = uspi->s_apb - 1;
1238         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1239         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1240         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1241         uspi->s_bpf = uspi->s_fsize << 3;
1242         uspi->s_bpfshift = uspi->s_fshift + 3;
1243         uspi->s_bpfmask = uspi->s_bpf - 1;
1244         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1245             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1246                 uspi->s_maxsymlinklen =
1247                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1248
1249         if (uspi->fs_magic == UFS2_MAGIC)
1250                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1251         else
1252                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1253         if (uspi->s_maxsymlinklen > maxsymlen) {
1254                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1255                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1256                 uspi->s_maxsymlinklen = maxsymlen;
1257         }
1258         sb->s_maxbytes = ufs_max_bytes(sb);
1259         sb->s_max_links = UFS_LINK_MAX;
1260
1261         inode = ufs_iget(sb, UFS_ROOTINO);
1262         if (IS_ERR(inode)) {
1263                 ret = PTR_ERR(inode);
1264                 goto failed;
1265         }
1266         sb->s_root = d_make_root(inode);
1267         if (!sb->s_root) {
1268                 ret = -ENOMEM;
1269                 goto failed;
1270         }
1271
1272         ufs_setup_cstotal(sb);
1273         /*
1274          * Read cylinder group structures
1275          */
1276         if (!sb_rdonly(sb))
1277                 if (!ufs_read_cylinder_structures(sb))
1278                         goto failed;
1279
1280         UFSD("EXIT\n");
1281         return 0;
1282
1283 failed:
1284         if (ubh)
1285                 ubh_brelse_uspi (uspi);
1286         kfree (uspi);
1287         kfree(sbi);
1288         sb->s_fs_info = NULL;
1289         UFSD("EXIT (FAILED)\n");
1290         return ret;
1291
1292 failed_nomem:
1293         UFSD("EXIT (NOMEM)\n");
1294         return -ENOMEM;
1295 }
1296
1297 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1298 {
1299         struct ufs_sb_private_info * uspi;
1300         struct ufs_super_block_first * usb1;
1301         struct ufs_super_block_third * usb3;
1302         unsigned new_mount_opt, ufstype;
1303         unsigned flags;
1304
1305         sync_filesystem(sb);
1306         mutex_lock(&UFS_SB(sb)->s_lock);
1307         uspi = UFS_SB(sb)->s_uspi;
1308         flags = UFS_SB(sb)->s_flags;
1309         usb1 = ubh_get_usb_first(uspi);
1310         usb3 = ubh_get_usb_third(uspi);
1311
1312         /*
1313          * Allow the "check" option to be passed as a remount option.
1314          * It is not possible to change ufstype option during remount
1315          */
1316         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1317         new_mount_opt = 0;
1318         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1319         if (!ufs_parse_options (data, &new_mount_opt)) {
1320                 mutex_unlock(&UFS_SB(sb)->s_lock);
1321                 return -EINVAL;
1322         }
1323         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1324                 new_mount_opt |= ufstype;
1325         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1326                 pr_err("ufstype can't be changed during remount\n");
1327                 mutex_unlock(&UFS_SB(sb)->s_lock);
1328                 return -EINVAL;
1329         }
1330
1331         if ((bool)(*mount_flags & MS_RDONLY) == sb_rdonly(sb)) {
1332                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1333                 mutex_unlock(&UFS_SB(sb)->s_lock);
1334                 return 0;
1335         }
1336
1337         /*
1338          * fs was mouted as rw, remounting ro
1339          */
1340         if (*mount_flags & MS_RDONLY) {
1341                 ufs_put_super_internal(sb);
1342                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1343                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1344                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1345                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1346                         ufs_set_fs_state(sb, usb1, usb3,
1347                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1348                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1349                 sb->s_flags |= MS_RDONLY;
1350         } else {
1351         /*
1352          * fs was mounted as ro, remounting rw
1353          */
1354 #ifndef CONFIG_UFS_FS_WRITE
1355                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1356                 mutex_unlock(&UFS_SB(sb)->s_lock);
1357                 return -EINVAL;
1358 #else
1359                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1360                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1361                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1362                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1363                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1364                         pr_err("this ufstype is read-only supported\n");
1365                         mutex_unlock(&UFS_SB(sb)->s_lock);
1366                         return -EINVAL;
1367                 }
1368                 if (!ufs_read_cylinder_structures(sb)) {
1369                         pr_err("failed during remounting\n");
1370                         mutex_unlock(&UFS_SB(sb)->s_lock);
1371                         return -EPERM;
1372                 }
1373                 sb->s_flags &= ~MS_RDONLY;
1374 #endif
1375         }
1376         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1377         mutex_unlock(&UFS_SB(sb)->s_lock);
1378         return 0;
1379 }
1380
1381 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1382 {
1383         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1384         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1385         const struct match_token *tp = tokens;
1386
1387         while (tp->token != Opt_onerror_panic && tp->token != mval)
1388                 ++tp;
1389         BUG_ON(tp->token == Opt_onerror_panic);
1390         seq_printf(seq, ",%s", tp->pattern);
1391
1392         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1393         while (tp->token != Opt_err && tp->token != mval)
1394                 ++tp;
1395         BUG_ON(tp->token == Opt_err);
1396         seq_printf(seq, ",%s", tp->pattern);
1397
1398         return 0;
1399 }
1400
1401 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1402 {
1403         struct super_block *sb = dentry->d_sb;
1404         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1405         unsigned  flags = UFS_SB(sb)->s_flags;
1406         struct ufs_super_block_third *usb3;
1407         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1408
1409         mutex_lock(&UFS_SB(sb)->s_lock);
1410         usb3 = ubh_get_usb_third(uspi);
1411
1412         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1413                 buf->f_type = UFS2_MAGIC;
1414         else
1415                 buf->f_type = UFS_MAGIC;
1416
1417         buf->f_blocks = uspi->s_dsize;
1418         buf->f_bfree = ufs_freefrags(uspi);
1419         buf->f_ffree = uspi->cs_total.cs_nifree;
1420         buf->f_bsize = sb->s_blocksize;
1421         buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1422                 ? (buf->f_bfree - uspi->s_root_blocks) : 0;
1423         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1424         buf->f_namelen = UFS_MAXNAMLEN;
1425         buf->f_fsid.val[0] = (u32)id;
1426         buf->f_fsid.val[1] = (u32)(id >> 32);
1427
1428         mutex_unlock(&UFS_SB(sb)->s_lock);
1429
1430         return 0;
1431 }
1432
1433 static struct kmem_cache * ufs_inode_cachep;
1434
1435 static struct inode *ufs_alloc_inode(struct super_block *sb)
1436 {
1437         struct ufs_inode_info *ei;
1438
1439         ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1440         if (!ei)
1441                 return NULL;
1442
1443         ei->vfs_inode.i_version = 1;
1444         seqlock_init(&ei->meta_lock);
1445         mutex_init(&ei->truncate_mutex);
1446         return &ei->vfs_inode;
1447 }
1448
1449 static void ufs_i_callback(struct rcu_head *head)
1450 {
1451         struct inode *inode = container_of(head, struct inode, i_rcu);
1452         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1453 }
1454
1455 static void ufs_destroy_inode(struct inode *inode)
1456 {
1457         call_rcu(&inode->i_rcu, ufs_i_callback);
1458 }
1459
1460 static void init_once(void *foo)
1461 {
1462         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1463
1464         inode_init_once(&ei->vfs_inode);
1465 }
1466
1467 static int __init init_inodecache(void)
1468 {
1469         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1470                                              sizeof(struct ufs_inode_info),
1471                                              0, (SLAB_RECLAIM_ACCOUNT|
1472                                                 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1473                                              init_once);
1474         if (ufs_inode_cachep == NULL)
1475                 return -ENOMEM;
1476         return 0;
1477 }
1478
1479 static void destroy_inodecache(void)
1480 {
1481         /*
1482          * Make sure all delayed rcu free inodes are flushed before we
1483          * destroy cache.
1484          */
1485         rcu_barrier();
1486         kmem_cache_destroy(ufs_inode_cachep);
1487 }
1488
1489 static const struct super_operations ufs_super_ops = {
1490         .alloc_inode    = ufs_alloc_inode,
1491         .destroy_inode  = ufs_destroy_inode,
1492         .write_inode    = ufs_write_inode,
1493         .evict_inode    = ufs_evict_inode,
1494         .put_super      = ufs_put_super,
1495         .sync_fs        = ufs_sync_fs,
1496         .statfs         = ufs_statfs,
1497         .remount_fs     = ufs_remount,
1498         .show_options   = ufs_show_options,
1499 };
1500
1501 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1502         int flags, const char *dev_name, void *data)
1503 {
1504         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1505 }
1506
1507 static struct file_system_type ufs_fs_type = {
1508         .owner          = THIS_MODULE,
1509         .name           = "ufs",
1510         .mount          = ufs_mount,
1511         .kill_sb        = kill_block_super,
1512         .fs_flags       = FS_REQUIRES_DEV,
1513 };
1514 MODULE_ALIAS_FS("ufs");
1515
1516 static int __init init_ufs_fs(void)
1517 {
1518         int err = init_inodecache();
1519         if (err)
1520                 goto out1;
1521         err = register_filesystem(&ufs_fs_type);
1522         if (err)
1523                 goto out;
1524         return 0;
1525 out:
1526         destroy_inodecache();
1527 out1:
1528         return err;
1529 }
1530
1531 static void __exit exit_ufs_fs(void)
1532 {
1533         unregister_filesystem(&ufs_fs_type);
1534         destroy_inodecache();
1535 }
1536
1537 module_init(init_ufs_fs)
1538 module_exit(exit_ufs_fs)
1539 MODULE_LICENSE("GPL");