fs/ufs/super.c

   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <gwingerde@gmail.com>
  45  *
  46  * Clean swab support on 19970406 by
  47  * Francois-Rene Rideau <fare@tunes.org>
  48  *
  49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52  *
  53  * NeXTstep support added on February 5th 1998 by
  54  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55  *
  56  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57  *
  58  * HP/UX hfs filesystem support added by
  59  * Martin K. Petersen <mkp@mkp.net>, August 1999
  60  *
  61  * UFS2 (of FreeBSD 5.x) support added by
  62  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63  *
  64  * UFS2 write support added by
  65  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  66  */
  67
  68
  69 #include <linux/exportfs.h>
  70 #include <linux/module.h>
  71 #include <linux/bitops.h>
  72
  73 #include <stdarg.h>
  74
  75 #include <asm/uaccess.h>
  76
  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/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 void lock_ufs(struct super_block *sb)
  98 {
  99 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
 100         struct ufs_sb_info *sbi = UFS_SB(sb);
 101
 102         mutex_lock(&sbi->mutex);
 103         sbi->mutex_owner = current;
 104 #endif
 105 }
 106
 107 void unlock_ufs(struct super_block *sb)
 108 {
 109 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
 110         struct ufs_sb_info *sbi = UFS_SB(sb);
 111
 112         sbi->mutex_owner = NULL;
 113         mutex_unlock(&sbi->mutex);
 114 #endif
 115 }
 116
 117 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 118 {
 119         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 120         struct inode *inode;
 121
 122         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 123                 return ERR_PTR(-ESTALE);
 124
 125         inode = ufs_iget(sb, ino);
 126         if (IS_ERR(inode))
 127                 return ERR_CAST(inode);
 128         if (generation && inode->i_generation != generation) {
 129                 iput(inode);
 130                 return ERR_PTR(-ESTALE);
 131         }
 132         return inode;
 133 }
 134
 135 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 136                                        int fh_len, int fh_type)
 137 {
 138         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 139 }
 140
 141 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 142                                        int fh_len, int fh_type)
 143 {
 144         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 145 }
 146
 147 static struct dentry *ufs_get_parent(struct dentry *child)
 148 {
 149         struct qstr dot_dot = {
 150                 .name   = "..",
 151                 .len    = 2,
 152         };
 153         ino_t ino;
 154
 155         ino = ufs_inode_by_name(child->d_inode, &dot_dot);
 156         if (!ino)
 157                 return ERR_PTR(-ENOENT);
 158         return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
 159 }
 160
 161 static const struct export_operations ufs_export_ops = {
 162         .fh_to_dentry   = ufs_fh_to_dentry,
 163         .fh_to_parent   = ufs_fh_to_parent,
 164         .get_parent     = ufs_get_parent,
 165 };
 166
 167 #ifdef CONFIG_UFS_DEBUG
 168 /*
 169  * Print contents of ufs_super_block, useful for debugging
 170  */
 171 static void ufs_print_super_stuff(struct super_block *sb,
 172                                   struct ufs_super_block_first *usb1,
 173                                   struct ufs_super_block_second *usb2,
 174                                   struct ufs_super_block_third *usb3)
 175 {
 176         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 177
 178         printk("ufs_print_super_stuff\n");
 179         printk("  magic:     0x%x\n", magic);
 180         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 181                 printk("  fs_size:   %llu\n", (unsigned long long)
 182                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 183                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 184                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 185                 printk("  bsize:         %u\n",
 186                        fs32_to_cpu(sb, usb1->fs_bsize));
 187                 printk("  fsize:         %u\n",
 188                        fs32_to_cpu(sb, usb1->fs_fsize));
 189                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 190                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 191                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 192                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 193                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 194                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 195                        (unsigned long long)
 196                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 197                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 198                        (unsigned long long)
 199                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 200                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 201                        (unsigned long long)
 202                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 203                 printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
 204                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 205         } else {
 206                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 207                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 208                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 209                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 210                 printk(" cgoffset:    %u\n",
 211                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 212                 printk(" ~cgmask:     0x%x\n",
 213                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 214                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 215                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 216                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 217                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 218                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 219                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 220                 printk(" fragshift:   %u\n",
 221                        fs32_to_cpu(sb, usb1->fs_fragshift));
 222                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 223                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 224                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 225                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 226                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 227                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 228                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 229                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 230                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 231                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 232                 printk(" fstodb:      %u\n",
 233                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 234                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 235                 printk(" ndir         %u\n",
 236                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 237                 printk(" nifree       %u\n",
 238                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 239                 printk(" nbfree       %u\n",
 240                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 241                 printk(" nffree       %u\n",
 242                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 243         }
 244         printk("\n");
 245 }
 246
 247 /*
 248  * Print contents of ufs_cylinder_group, useful for debugging
 249  */
 250 static void ufs_print_cylinder_stuff(struct super_block *sb,
 251                                      struct ufs_cylinder_group *cg)
 252 {
 253         printk("\nufs_print_cylinder_stuff\n");
 254         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 255         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 256         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 257         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 258         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 259         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 260         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 261         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 262         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 263         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 264         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 265         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 266         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 267         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 268         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 269             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 270             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 271             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 272             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 273         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 274         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 275         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 276         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 277         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 278         printk("  clustersumoff %u\n",
 279                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 280         printk("  clusteroff    %u\n",
 281                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 282         printk("  nclusterblks  %u\n",
 283                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 284         printk("\n");
 285 }
 286 #else
 287 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 288 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 289 #endif /* CONFIG_UFS_DEBUG */
 290
 291 static const struct super_operations ufs_super_ops;
 292
 293 static char error_buf[1024];
 294
 295 void ufs_error (struct super_block * sb, const char * function,
 296         const char * fmt, ...)
 297 {
 298         struct ufs_sb_private_info * uspi;
 299         struct ufs_super_block_first * usb1;
 300         va_list args;
 301
 302         uspi = UFS_SB(sb)->s_uspi;
 303         usb1 = ubh_get_usb_first(uspi);
 304
 305         if (!(sb->s_flags & MS_RDONLY)) {
 306                 usb1->fs_clean = UFS_FSBAD;
 307                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 308                 sb->s_dirt = 1;
 309                 sb->s_flags |= MS_RDONLY;
 310         }
 311         va_start (args, fmt);
 312         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 313         va_end (args);
 314         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 315         case UFS_MOUNT_ONERROR_PANIC:
 316                 panic ("UFS-fs panic (device %s): %s: %s\n",
 317                         sb->s_id, function, error_buf);
 318
 319         case UFS_MOUNT_ONERROR_LOCK:
 320         case UFS_MOUNT_ONERROR_UMOUNT:
 321         case UFS_MOUNT_ONERROR_REPAIR:
 322                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 323                         sb->s_id, function, error_buf);
 324         }
 325 }
 326
 327 void ufs_panic (struct super_block * sb, const char * function,
 328         const char * fmt, ...)
 329 {
 330         struct ufs_sb_private_info * uspi;
 331         struct ufs_super_block_first * usb1;
 332         va_list args;
 333
 334         uspi = UFS_SB(sb)->s_uspi;
 335         usb1 = ubh_get_usb_first(uspi);
 336
 337         if (!(sb->s_flags & MS_RDONLY)) {
 338                 usb1->fs_clean = UFS_FSBAD;
 339                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 340                 sb->s_dirt = 1;
 341         }
 342         va_start (args, fmt);
 343         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 344         va_end (args);
 345         sb->s_flags |= MS_RDONLY;
 346         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 347                 sb->s_id, function, error_buf);
 348 }
 349
 350 void ufs_warning (struct super_block * sb, const char * function,
 351         const char * fmt, ...)
 352 {
 353         va_list args;
 354
 355         va_start (args, fmt);
 356         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 357         va_end (args);
 358         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 359                 sb->s_id, function, error_buf);
 360 }
 361
 362 enum {
 363        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 364        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 365        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 366        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 367        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 368        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 369        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 370        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 371        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 372        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 373        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 374        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 375        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 376        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 377        Opt_err
 378 };
 379
 380 static const match_table_t tokens = {
 381         {Opt_type_old, "ufstype=old"},
 382         {Opt_type_sunx86, "ufstype=sunx86"},
 383         {Opt_type_sun, "ufstype=sun"},
 384         {Opt_type_sunos, "ufstype=sunos"},
 385         {Opt_type_44bsd, "ufstype=44bsd"},
 386         {Opt_type_ufs2, "ufstype=ufs2"},
 387         {Opt_type_ufs2, "ufstype=5xbsd"},
 388         {Opt_type_hp, "ufstype=hp"},
 389         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 390         {Opt_type_nextstep, "ufstype=nextstep"},
 391         {Opt_type_openstep, "ufstype=openstep"},
 392 /*end of possible ufs types */
 393         {Opt_onerror_panic, "onerror=panic"},
 394         {Opt_onerror_lock, "onerror=lock"},
 395         {Opt_onerror_umount, "onerror=umount"},
 396         {Opt_onerror_repair, "onerror=repair"},
 397         {Opt_err, NULL}
 398 };
 399
 400 static int ufs_parse_options (char * options, unsigned * mount_options)
 401 {
 402         char * p;
 403
 404         UFSD("ENTER\n");
 405
 406         if (!options)
 407                 return 1;
 408
 409         while ((p = strsep(&options, ",")) != NULL) {
 410                 substring_t args[MAX_OPT_ARGS];
 411                 int token;
 412                 if (!*p)
 413                         continue;
 414
 415                 token = match_token(p, tokens, args);
 416                 switch (token) {
 417                 case Opt_type_old:
 418                         ufs_clear_opt (*mount_options, UFSTYPE);
 419                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 420                         break;
 421                 case Opt_type_sunx86:
 422                         ufs_clear_opt (*mount_options, UFSTYPE);
 423                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 424                         break;
 425                 case Opt_type_sun:
 426                         ufs_clear_opt (*mount_options, UFSTYPE);
 427                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 428                         break;
 429                 case Opt_type_sunos:
 430                         ufs_clear_opt(*mount_options, UFSTYPE);
 431                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 432                         break;
 433                 case Opt_type_44bsd:
 434                         ufs_clear_opt (*mount_options, UFSTYPE);
 435                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 436                         break;
 437                 case Opt_type_ufs2:
 438                         ufs_clear_opt(*mount_options, UFSTYPE);
 439                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 440                         break;
 441                 case Opt_type_hp:
 442                         ufs_clear_opt (*mount_options, UFSTYPE);
 443                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 444                         break;
 445                 case Opt_type_nextstepcd:
 446                         ufs_clear_opt (*mount_options, UFSTYPE);
 447                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 448                         break;
 449                 case Opt_type_nextstep:
 450                         ufs_clear_opt (*mount_options, UFSTYPE);
 451                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 452                         break;
 453                 case Opt_type_openstep:
 454                         ufs_clear_opt (*mount_options, UFSTYPE);
 455                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 456                         break;
 457                 case Opt_onerror_panic:
 458                         ufs_clear_opt (*mount_options, ONERROR);
 459                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 460                         break;
 461                 case Opt_onerror_lock:
 462                         ufs_clear_opt (*mount_options, ONERROR);
 463                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 464                         break;
 465                 case Opt_onerror_umount:
 466                         ufs_clear_opt (*mount_options, ONERROR);
 467                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 468                         break;
 469                 case Opt_onerror_repair:
 470                         printk("UFS-fs: Unable to do repair on error, "
 471                                 "will lock lock instead\n");
 472                         ufs_clear_opt (*mount_options, ONERROR);
 473                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 474                         break;
 475                 default:
 476                         printk("UFS-fs: Invalid option: \"%s\" "
 477                                         "or missing value\n", p);
 478                         return 0;
 479                 }
 480         }
 481         return 1;
 482 }
 483
 484 /*
 485  * Different types of UFS hold fs_cstotal in different
 486  * places, and use different data structure for it.
 487  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
 488  */
 489 static void ufs_setup_cstotal(struct super_block *sb)
 490 {
 491         struct ufs_sb_info *sbi = UFS_SB(sb);
 492         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 493         struct ufs_super_block_first *usb1;
 494         struct ufs_super_block_second *usb2;
 495         struct ufs_super_block_third *usb3;
 496         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 497
 498         UFSD("ENTER, mtype=%u\n", mtype);
 499         usb1 = ubh_get_usb_first(uspi);
 500         usb2 = ubh_get_usb_second(uspi);
 501         usb3 = ubh_get_usb_third(uspi);
 502
 503         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 504              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 505             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 506                 /*we have statistic in different place, then usual*/
 507                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 508                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 509                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 510                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 511         } else {
 512                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 513                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 514                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 515                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 516         }
 517         UFSD("EXIT\n");
 518 }
 519
 520 /*
 521  * Read on-disk structures associated with cylinder groups
 522  */
 523 static int ufs_read_cylinder_structures(struct super_block *sb)
 524 {
 525         struct ufs_sb_info *sbi = UFS_SB(sb);
 526         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 527         struct ufs_buffer_head * ubh;
 528         unsigned char * base, * space;
 529         unsigned size, blks, i;
 530         struct ufs_super_block_third *usb3;
 531
 532         UFSD("ENTER\n");
 533
 534         usb3 = ubh_get_usb_third(uspi);
 535         /*
 536          * Read cs structures from (usually) first data block
 537          * on the device.
 538          */
 539         size = uspi->s_cssize;
 540         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 541         base = space = kmalloc(size, GFP_NOFS);
 542         if (!base)
 543                 goto failed;
 544         sbi->s_csp = (struct ufs_csum *)space;
 545         for (i = 0; i < blks; i += uspi->s_fpb) {
 546                 size = uspi->s_bsize;
 547                 if (i + uspi->s_fpb > blks)
 548                         size = (blks - i) * uspi->s_fsize;
 549
 550                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 551
 552                 if (!ubh)
 553                         goto failed;
 554
 555                 ubh_ubhcpymem (space, ubh, size);
 556
 557                 space += size;
 558                 ubh_brelse (ubh);
 559                 ubh = NULL;
 560         }
 561
 562         /*
 563          * Read cylinder group (we read only first fragment from block
 564          * at this time) and prepare internal data structures for cg caching.
 565          */
 566         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
 567                 goto failed;
 568         for (i = 0; i < uspi->s_ncg; i++)
 569                 sbi->s_ucg[i] = NULL;
 570         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 571                 sbi->s_ucpi[i] = NULL;
 572                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 573         }
 574         for (i = 0; i < uspi->s_ncg; i++) {
 575                 UFSD("read cg %u\n", i);
 576                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 577                         goto failed;
 578                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 579                         goto failed;
 580
 581                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 582         }
 583         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 584                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
 585                         goto failed;
 586                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 587         }
 588         sbi->s_cg_loaded = 0;
 589         UFSD("EXIT\n");
 590         return 1;
 591
 592 failed:
 593         kfree (base);
 594         if (sbi->s_ucg) {
 595                 for (i = 0; i < uspi->s_ncg; i++)
 596                         if (sbi->s_ucg[i])
 597                                 brelse (sbi->s_ucg[i]);
 598                 kfree (sbi->s_ucg);
 599                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 600                         kfree (sbi->s_ucpi[i]);
 601         }
 602         UFSD("EXIT (FAILED)\n");
 603         return 0;
 604 }
 605
 606 /*
 607  * Sync our internal copy of fs_cstotal with disk
 608  */
 609 static void ufs_put_cstotal(struct super_block *sb)
 610 {
 611         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 612         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 613         struct ufs_super_block_first *usb1;
 614         struct ufs_super_block_second *usb2;
 615         struct ufs_super_block_third *usb3;
 616
 617         UFSD("ENTER\n");
 618         usb1 = ubh_get_usb_first(uspi);
 619         usb2 = ubh_get_usb_second(uspi);
 620         usb3 = ubh_get_usb_third(uspi);
 621
 622         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 623              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 624             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 625                 /*we have statistic in different place, then usual*/
 626                 usb2->fs_un.fs_u2.cs_ndir =
 627                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 628                 usb2->fs_un.fs_u2.cs_nbfree =
 629                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 630                 usb3->fs_un1.fs_u2.cs_nifree =
 631                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 632                 usb3->fs_un1.fs_u2.cs_nffree =
 633                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 634         } else {
 635                 usb1->fs_cstotal.cs_ndir =
 636                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 637                 usb1->fs_cstotal.cs_nbfree =
 638                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 639                 usb1->fs_cstotal.cs_nifree =
 640                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 641                 usb1->fs_cstotal.cs_nffree =
 642                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 643         }
 644         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 645         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 646         UFSD("EXIT\n");
 647 }
 648
 649 /**
 650  * ufs_put_super_internal() - put on-disk intrenal structures
 651  * @sb: pointer to super_block structure
 652  * Put on-disk structures associated with cylinder groups
 653  * and write them back to disk, also update cs_total on disk
 654  */
 655 static void ufs_put_super_internal(struct super_block *sb)
 656 {
 657         struct ufs_sb_info *sbi = UFS_SB(sb);
 658         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 659         struct ufs_buffer_head * ubh;
 660         unsigned char * base, * space;
 661         unsigned blks, size, i;
 662
 663
 664         UFSD("ENTER\n");
 665
 666         ufs_put_cstotal(sb);
 667         size = uspi->s_cssize;
 668         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 669         base = space = (char*) sbi->s_csp;
 670         for (i = 0; i < blks; i += uspi->s_fpb) {
 671                 size = uspi->s_bsize;
 672                 if (i + uspi->s_fpb > blks)
 673                         size = (blks - i) * uspi->s_fsize;
 674
 675                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 676
 677                 ubh_memcpyubh (ubh, space, size);
 678                 space += size;
 679                 ubh_mark_buffer_uptodate (ubh, 1);
 680                 ubh_mark_buffer_dirty (ubh);
 681                 ubh_brelse (ubh);
 682         }
 683         for (i = 0; i < sbi->s_cg_loaded; i++) {
 684                 ufs_put_cylinder (sb, i);
 685                 kfree (sbi->s_ucpi[i]);
 686         }
 687         for (; i < UFS_MAX_GROUP_LOADED; i++)
 688                 kfree (sbi->s_ucpi[i]);
 689         for (i = 0; i < uspi->s_ncg; i++)
 690                 brelse (sbi->s_ucg[i]);
 691         kfree (sbi->s_ucg);
 692         kfree (base);
 693
 694         UFSD("EXIT\n");
 695 }
 696
 697 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 698 {
 699         struct ufs_sb_info * sbi;
 700         struct ufs_sb_private_info * uspi;
 701         struct ufs_super_block_first * usb1;
 702         struct ufs_super_block_second * usb2;
 703         struct ufs_super_block_third * usb3;
 704         struct ufs_buffer_head * ubh;
 705         struct inode *inode;
 706         unsigned block_size, super_block_size;
 707         unsigned flags;
 708         unsigned super_block_offset;
 709         unsigned maxsymlen;
 710         int ret = -EINVAL;
 711
 712         uspi = NULL;
 713         ubh = NULL;
 714         flags = 0;
 715
 716         UFSD("ENTER\n");
 717
 718         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 719         if (!sbi)
 720                 goto failed_nomem;
 721         sb->s_fs_info = sbi;
 722
 723         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 724
 725 #ifndef CONFIG_UFS_FS_WRITE
 726         if (!(sb->s_flags & MS_RDONLY)) {
 727                 printk("ufs was compiled with read-only support, "
 728                 "can't be mounted as read-write\n");
 729                 goto failed;
 730         }
 731 #endif
 732         mutex_init(&sbi->mutex);
 733         /*
 734          * Set default mount options
 735          * Parse mount options
 736          */
 737         sbi->s_mount_opt = 0;
 738         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 739         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 740                 printk("wrong mount options\n");
 741                 goto failed;
 742         }
 743         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 744                 if (!silent)
 745                         printk("You didn't specify the type of your ufs filesystem\n\n"
 746                         "mount -t ufs -o ufstype="
 747                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 748                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 749                         "default is ufstype=old\n");
 750                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 751         }
 752
 753         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 754         sbi->s_uspi = uspi;
 755         if (!uspi)
 756                 goto failed;
 757         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 758         super_block_offset=UFS_SBLOCK;
 759
 760         /* Keep 2Gig file limit. Some UFS variants need to override
 761            this but as I don't know which I'll let those in the know loosen
 762            the rules */
 763         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 764         case UFS_MOUNT_UFSTYPE_44BSD:
 765                 UFSD("ufstype=44bsd\n");
 766                 uspi->s_fsize = block_size = 512;
 767                 uspi->s_fmask = ~(512 - 1);
 768                 uspi->s_fshift = 9;
 769                 uspi->s_sbsize = super_block_size = 1536;
 770                 uspi->s_sbbase = 0;
 771                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 772                 break;
 773         case UFS_MOUNT_UFSTYPE_UFS2:
 774                 UFSD("ufstype=ufs2\n");
 775                 super_block_offset=SBLOCK_UFS2;
 776                 uspi->s_fsize = block_size = 512;
 777                 uspi->s_fmask = ~(512 - 1);
 778                 uspi->s_fshift = 9;
 779                 uspi->s_sbsize = super_block_size = 1536;
 780                 uspi->s_sbbase =  0;
 781                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 782                 break;
 783
 784         case UFS_MOUNT_UFSTYPE_SUN:
 785                 UFSD("ufstype=sun\n");
 786                 uspi->s_fsize = block_size = 1024;
 787                 uspi->s_fmask = ~(1024 - 1);
 788                 uspi->s_fshift = 10;
 789                 uspi->s_sbsize = super_block_size = 2048;
 790                 uspi->s_sbbase = 0;
 791                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 792                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 793                 break;
 794
 795         case UFS_MOUNT_UFSTYPE_SUNOS:
 796                 UFSD(("ufstype=sunos\n"))
 797                 uspi->s_fsize = block_size = 1024;
 798                 uspi->s_fmask = ~(1024 - 1);
 799                 uspi->s_fshift = 10;
 800                 uspi->s_sbsize = 2048;
 801                 super_block_size = 2048;
 802                 uspi->s_sbbase = 0;
 803                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 804                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 805                 break;
 806
 807         case UFS_MOUNT_UFSTYPE_SUNx86:
 808                 UFSD("ufstype=sunx86\n");
 809                 uspi->s_fsize = block_size = 1024;
 810                 uspi->s_fmask = ~(1024 - 1);
 811                 uspi->s_fshift = 10;
 812                 uspi->s_sbsize = super_block_size = 2048;
 813                 uspi->s_sbbase = 0;
 814                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 815                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 816                 break;
 817
 818         case UFS_MOUNT_UFSTYPE_OLD:
 819                 UFSD("ufstype=old\n");
 820                 uspi->s_fsize = block_size = 1024;
 821                 uspi->s_fmask = ~(1024 - 1);
 822                 uspi->s_fshift = 10;
 823                 uspi->s_sbsize = super_block_size = 2048;
 824                 uspi->s_sbbase = 0;
 825                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 826                 if (!(sb->s_flags & MS_RDONLY)) {
 827                         if (!silent)
 828                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 829                         sb->s_flags |= MS_RDONLY;
 830                 }
 831                 break;
 832
 833         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 834                 UFSD("ufstype=nextstep\n");
 835                 uspi->s_fsize = block_size = 1024;
 836                 uspi->s_fmask = ~(1024 - 1);
 837                 uspi->s_fshift = 10;
 838                 uspi->s_sbsize = super_block_size = 2048;
 839                 uspi->s_sbbase = 0;
 840                 uspi->s_dirblksize = 1024;
 841                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 842                 if (!(sb->s_flags & MS_RDONLY)) {
 843                         if (!silent)
 844                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 845                         sb->s_flags |= MS_RDONLY;
 846                 }
 847                 break;
 848
 849         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 850                 UFSD("ufstype=nextstep-cd\n");
 851                 uspi->s_fsize = block_size = 2048;
 852                 uspi->s_fmask = ~(2048 - 1);
 853                 uspi->s_fshift = 11;
 854                 uspi->s_sbsize = super_block_size = 2048;
 855                 uspi->s_sbbase = 0;
 856                 uspi->s_dirblksize = 1024;
 857                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 858                 if (!(sb->s_flags & MS_RDONLY)) {
 859                         if (!silent)
 860                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 861                         sb->s_flags |= MS_RDONLY;
 862                 }
 863                 break;
 864
 865         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 866                 UFSD("ufstype=openstep\n");
 867                 uspi->s_fsize = block_size = 1024;
 868                 uspi->s_fmask = ~(1024 - 1);
 869                 uspi->s_fshift = 10;
 870                 uspi->s_sbsize = super_block_size = 2048;
 871                 uspi->s_sbbase = 0;
 872                 uspi->s_dirblksize = 1024;
 873                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 874                 if (!(sb->s_flags & MS_RDONLY)) {
 875                         if (!silent)
 876                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 877                         sb->s_flags |= MS_RDONLY;
 878                 }
 879                 break;
 880
 881         case UFS_MOUNT_UFSTYPE_HP:
 882                 UFSD("ufstype=hp\n");
 883                 uspi->s_fsize = block_size = 1024;
 884                 uspi->s_fmask = ~(1024 - 1);
 885                 uspi->s_fshift = 10;
 886                 uspi->s_sbsize = super_block_size = 2048;
 887                 uspi->s_sbbase = 0;
 888                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 889                 if (!(sb->s_flags & MS_RDONLY)) {
 890                         if (!silent)
 891                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 892                         sb->s_flags |= MS_RDONLY;
 893                 }
 894                 break;
 895         default:
 896                 if (!silent)
 897                         printk("unknown ufstype\n");
 898                 goto failed;
 899         }
 900
 901 again:
 902         if (!sb_set_blocksize(sb, block_size)) {
 903                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 904                 goto failed;
 905         }
 906
 907         /*
 908          * read ufs super block from device
 909          */
 910
 911         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 912
 913         if (!ubh)
 914             goto failed;
 915
 916         usb1 = ubh_get_usb_first(uspi);
 917         usb2 = ubh_get_usb_second(uspi);
 918         usb3 = ubh_get_usb_third(uspi);
 919
 920         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 921         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 922         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 923             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 924                 flags &= ~UFS_ST_MASK;
 925                 flags |=  UFS_ST_SUN;
 926         }
 927
 928         /*
 929          * Check ufs magic number
 930          */
 931         sbi->s_bytesex = BYTESEX_LE;
 932         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 933                 case UFS_MAGIC:
 934                 case UFS_MAGIC_BW:
 935                 case UFS2_MAGIC:
 936                 case UFS_MAGIC_LFN:
 937                 case UFS_MAGIC_FEA:
 938                 case UFS_MAGIC_4GB:
 939                         goto magic_found;
 940         }
 941         sbi->s_bytesex = BYTESEX_BE;
 942         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 943                 case UFS_MAGIC:
 944                 case UFS_MAGIC_BW:
 945                 case UFS2_MAGIC:
 946                 case UFS_MAGIC_LFN:
 947                 case UFS_MAGIC_FEA:
 948                 case UFS_MAGIC_4GB:
 949                         goto magic_found;
 950         }
 951
 952         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 953           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 954           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 955           && uspi->s_sbbase < 256) {
 956                 ubh_brelse_uspi(uspi);
 957                 ubh = NULL;
 958                 uspi->s_sbbase += 8;
 959                 goto again;
 960         }
 961         if (!silent)
 962                 printk("ufs_read_super: bad magic number\n");
 963         goto failed;
 964
 965 magic_found:
 966         /*
 967          * Check block and fragment sizes
 968          */
 969         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 970         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 971         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 972         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 973         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 974
 975         if (!is_power_of_2(uspi->s_fsize)) {
 976                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 977                         uspi->s_fsize);
 978                         goto failed;
 979         }
 980         if (uspi->s_fsize < 512) {
 981                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 982                         uspi->s_fsize);
 983                 goto failed;
 984         }
 985         if (uspi->s_fsize > 4096) {
 986                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 987                         uspi->s_fsize);
 988                 goto failed;
 989         }
 990         if (!is_power_of_2(uspi->s_bsize)) {
 991                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 992                         uspi->s_bsize);
 993                 goto failed;
 994         }
 995         if (uspi->s_bsize < 4096) {
 996                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 997                         uspi->s_bsize);
 998                 goto failed;
 999         }
1000         if (uspi->s_bsize / uspi->s_fsize > 8) {
1001                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
1002                         uspi->s_bsize / uspi->s_fsize);
1003                 goto failed;
1004         }
1005         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1006                 ubh_brelse_uspi(uspi);
1007                 ubh = NULL;
1008                 block_size = uspi->s_fsize;
1009                 super_block_size = uspi->s_sbsize;
1010                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1011                 goto again;
1012         }
1013
1014         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1015         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1016
1017         /*
1018          * Check, if file system was correctly unmounted.
1019          * If not, make it read only.
1020          */
1021         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1022           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1023           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1024             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1025           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1026           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1027                 switch(usb1->fs_clean) {
1028                 case UFS_FSCLEAN:
1029                         UFSD("fs is clean\n");
1030                         break;
1031                 case UFS_FSSTABLE:
1032                         UFSD("fs is stable\n");
1033                         break;
1034                 case UFS_FSLOG:
1035                         UFSD("fs is logging fs\n");
1036                         break;
1037                 case UFS_FSOSF1:
1038                         UFSD("fs is DEC OSF/1\n");
1039                         break;
1040                 case UFS_FSACTIVE:
1041                         printk("ufs_read_super: fs is active\n");
1042                         sb->s_flags |= MS_RDONLY;
1043                         break;
1044                 case UFS_FSBAD:
1045                         printk("ufs_read_super: fs is bad\n");
1046                         sb->s_flags |= MS_RDONLY;
1047                         break;
1048                 default:
1049                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1050                         sb->s_flags |= MS_RDONLY;
1051                         break;
1052                 }
1053         } else {
1054                 printk("ufs_read_super: fs needs fsck\n");
1055                 sb->s_flags |= MS_RDONLY;
1056         }
1057
1058         /*
1059          * Read ufs_super_block into internal data structures
1060          */
1061         sb->s_op = &ufs_super_ops;
1062         sb->s_export_op = &ufs_export_ops;
1063
1064         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1065
1066         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1067         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1068         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1069         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1070         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1071         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1072
1073         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1074                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1075                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1076         } else {
1077                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1078                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1079         }
1080
1081         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1082         /* s_bsize already set */
1083         /* s_fsize already set */
1084         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1085         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1086         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1087         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1088         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1089         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1090         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1091                 uspi->s_fshift);
1092         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1093         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1094         /* s_sbsize already set */
1095         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1096         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1097         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1098         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1099         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1100         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1101         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1102         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1103
1104         if (uspi->fs_magic == UFS2_MAGIC)
1105                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1106         else
1107                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1108
1109         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1110         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1111         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1112         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1113         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1114         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1115         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1116         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1117         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1118         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1119         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1120         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1121         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1122         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1123
1124         /*
1125          * Compute another frequently used values
1126          */
1127         uspi->s_fpbmask = uspi->s_fpb - 1;
1128         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1129                 uspi->s_apbshift = uspi->s_bshift - 3;
1130         else
1131                 uspi->s_apbshift = uspi->s_bshift - 2;
1132
1133         uspi->s_2apbshift = uspi->s_apbshift * 2;
1134         uspi->s_3apbshift = uspi->s_apbshift * 3;
1135         uspi->s_apb = 1 << uspi->s_apbshift;
1136         uspi->s_2apb = 1 << uspi->s_2apbshift;
1137         uspi->s_3apb = 1 << uspi->s_3apbshift;
1138         uspi->s_apbmask = uspi->s_apb - 1;
1139         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1140         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1141         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1142         uspi->s_bpf = uspi->s_fsize << 3;
1143         uspi->s_bpfshift = uspi->s_fshift + 3;
1144         uspi->s_bpfmask = uspi->s_bpf - 1;
1145         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1146             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1147                 uspi->s_maxsymlinklen =
1148                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1149
1150         if (uspi->fs_magic == UFS2_MAGIC)
1151                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1152         else
1153                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1154         if (uspi->s_maxsymlinklen > maxsymlen) {
1155                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1156                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1157                 uspi->s_maxsymlinklen = maxsymlen;
1158         }
1159         sb->s_max_links = UFS_LINK_MAX;
1160
1161         inode = ufs_iget(sb, UFS_ROOTINO);
1162         if (IS_ERR(inode)) {
1163                 ret = PTR_ERR(inode);
1164                 goto failed;
1165         }
1166         sb->s_root = d_make_root(inode);
1167         if (!sb->s_root) {
1168                 ret = -ENOMEM;
1169                 goto failed;
1170         }
1171
1172         ufs_setup_cstotal(sb);
1173         /*
1174          * Read cylinder group structures
1175          */
1176         if (!(sb->s_flags & MS_RDONLY))
1177                 if (!ufs_read_cylinder_structures(sb))
1178                         goto failed;
1179
1180         UFSD("EXIT\n");
1181         return 0;
1182
1183 failed:
1184         if (ubh)
1185                 ubh_brelse_uspi (uspi);
1186         kfree (uspi);
1187         kfree(sbi);
1188         sb->s_fs_info = NULL;
1189         UFSD("EXIT (FAILED)\n");
1190         return ret;
1191
1192 failed_nomem:
1193         UFSD("EXIT (NOMEM)\n");
1194         return -ENOMEM;
1195 }
1196
1197 static int ufs_sync_fs(struct super_block *sb, int wait)
1198 {
1199         struct ufs_sb_private_info * uspi;
1200         struct ufs_super_block_first * usb1;
1201         struct ufs_super_block_third * usb3;
1202         unsigned flags;
1203
1204         lock_ufs(sb);
1205         lock_super(sb);
1206
1207         UFSD("ENTER\n");
1208
1209         flags = UFS_SB(sb)->s_flags;
1210         uspi = UFS_SB(sb)->s_uspi;
1211         usb1 = ubh_get_usb_first(uspi);
1212         usb3 = ubh_get_usb_third(uspi);
1213
1214         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1215         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
1216             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1217             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1218                 ufs_set_fs_state(sb, usb1, usb3,
1219                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1220         ufs_put_cstotal(sb);
1221         sb->s_dirt = 0;
1222
1223         UFSD("EXIT\n");
1224         unlock_super(sb);
1225         unlock_ufs(sb);
1226
1227         return 0;
1228 }
1229
1230 static void ufs_write_super(struct super_block *sb)
1231 {
1232         if (!(sb->s_flags & MS_RDONLY))
1233                 ufs_sync_fs(sb, 1);
1234         else
1235                 sb->s_dirt = 0;
1236 }
1237
1238 static void ufs_put_super(struct super_block *sb)
1239 {
1240         struct ufs_sb_info * sbi = UFS_SB(sb);
1241
1242         UFSD("ENTER\n");
1243
1244         if (sb->s_dirt)
1245                 ufs_write_super(sb);
1246
1247         if (!(sb->s_flags & MS_RDONLY))
1248                 ufs_put_super_internal(sb);
1249
1250         ubh_brelse_uspi (sbi->s_uspi);
1251         kfree (sbi->s_uspi);
1252         kfree (sbi);
1253         sb->s_fs_info = NULL;
1254         UFSD("EXIT\n");
1255         return;
1256 }
1257
1258
1259 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1260 {
1261         struct ufs_sb_private_info * uspi;
1262         struct ufs_super_block_first * usb1;
1263         struct ufs_super_block_third * usb3;
1264         unsigned new_mount_opt, ufstype;
1265         unsigned flags;
1266
1267         lock_ufs(sb);
1268         lock_super(sb);
1269         uspi = UFS_SB(sb)->s_uspi;
1270         flags = UFS_SB(sb)->s_flags;
1271         usb1 = ubh_get_usb_first(uspi);
1272         usb3 = ubh_get_usb_third(uspi);
1273
1274         /*
1275          * Allow the "check" option to be passed as a remount option.
1276          * It is not possible to change ufstype option during remount
1277          */
1278         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1279         new_mount_opt = 0;
1280         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1281         if (!ufs_parse_options (data, &new_mount_opt)) {
1282                 unlock_super(sb);
1283                 unlock_ufs(sb);
1284                 return -EINVAL;
1285         }
1286         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1287                 new_mount_opt |= ufstype;
1288         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1289                 printk("ufstype can't be changed during remount\n");
1290                 unlock_super(sb);
1291                 unlock_ufs(sb);
1292                 return -EINVAL;
1293         }
1294
1295         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1296                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1297                 unlock_super(sb);
1298                 unlock_ufs(sb);
1299                 return 0;
1300         }
1301
1302         /*
1303          * fs was mouted as rw, remounting ro
1304          */
1305         if (*mount_flags & MS_RDONLY) {
1306                 ufs_put_super_internal(sb);
1307                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1308                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1309                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1310                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1311                         ufs_set_fs_state(sb, usb1, usb3,
1312                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1313                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1314                 sb->s_dirt = 0;
1315                 sb->s_flags |= MS_RDONLY;
1316         } else {
1317         /*
1318          * fs was mounted as ro, remounting rw
1319          */
1320 #ifndef CONFIG_UFS_FS_WRITE
1321                 printk("ufs was compiled with read-only support, "
1322                 "can't be mounted as read-write\n");
1323                 unlock_super(sb);
1324                 unlock_ufs(sb);
1325                 return -EINVAL;
1326 #else
1327                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1328                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1329                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1330                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1331                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1332                         printk("this ufstype is read-only supported\n");
1333                         unlock_super(sb);
1334                         unlock_ufs(sb);
1335                         return -EINVAL;
1336                 }
1337                 if (!ufs_read_cylinder_structures(sb)) {
1338                         printk("failed during remounting\n");
1339                         unlock_super(sb);
1340                         unlock_ufs(sb);
1341                         return -EPERM;
1342                 }
1343                 sb->s_flags &= ~MS_RDONLY;
1344 #endif
1345         }
1346         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1347         unlock_super(sb);
1348         unlock_ufs(sb);
1349         return 0;
1350 }
1351
1352 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1353 {
1354         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1355         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1356         const struct match_token *tp = tokens;
1357
1358         while (tp->token != Opt_onerror_panic && tp->token != mval)
1359                 ++tp;
1360         BUG_ON(tp->token == Opt_onerror_panic);
1361         seq_printf(seq, ",%s", tp->pattern);
1362
1363         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1364         while (tp->token != Opt_err && tp->token != mval)
1365                 ++tp;
1366         BUG_ON(tp->token == Opt_err);
1367         seq_printf(seq, ",%s", tp->pattern);
1368
1369         return 0;
1370 }
1371
1372 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1373 {
1374         struct super_block *sb = dentry->d_sb;
1375         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1376         unsigned  flags = UFS_SB(sb)->s_flags;
1377         struct ufs_super_block_first *usb1;
1378         struct ufs_super_block_second *usb2;
1379         struct ufs_super_block_third *usb3;
1380         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1381
1382         lock_ufs(sb);
1383
1384         usb1 = ubh_get_usb_first(uspi);
1385         usb2 = ubh_get_usb_second(uspi);
1386         usb3 = ubh_get_usb_third(uspi);
1387
1388         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1389                 buf->f_type = UFS2_MAGIC;
1390                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1391         } else {
1392                 buf->f_type = UFS_MAGIC;
1393                 buf->f_blocks = uspi->s_dsize;
1394         }
1395         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1396                 uspi->cs_total.cs_nffree;
1397         buf->f_ffree = uspi->cs_total.cs_nifree;
1398         buf->f_bsize = sb->s_blocksize;
1399         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1400                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1401         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1402         buf->f_namelen = UFS_MAXNAMLEN;
1403         buf->f_fsid.val[0] = (u32)id;
1404         buf->f_fsid.val[1] = (u32)(id >> 32);
1405
1406         unlock_ufs(sb);
1407
1408         return 0;
1409 }
1410
1411 static struct kmem_cache * ufs_inode_cachep;
1412
1413 static struct inode *ufs_alloc_inode(struct super_block *sb)
1414 {
1415         struct ufs_inode_info *ei;
1416         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1417         if (!ei)
1418                 return NULL;
1419         ei->vfs_inode.i_version = 1;
1420         return &ei->vfs_inode;
1421 }
1422
1423 static void ufs_i_callback(struct rcu_head *head)
1424 {
1425         struct inode *inode = container_of(head, struct inode, i_rcu);
1426         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1427 }
1428
1429 static void ufs_destroy_inode(struct inode *inode)
1430 {
1431         call_rcu(&inode->i_rcu, ufs_i_callback);
1432 }
1433
1434 static void init_once(void *foo)
1435 {
1436         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1437
1438         inode_init_once(&ei->vfs_inode);
1439 }
1440
1441 static int init_inodecache(void)
1442 {
1443         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1444                                              sizeof(struct ufs_inode_info),
1445                                              0, (SLAB_RECLAIM_ACCOUNT|
1446                                                 SLAB_MEM_SPREAD),
1447                                              init_once);
1448         if (ufs_inode_cachep == NULL)
1449                 return -ENOMEM;
1450         return 0;
1451 }
1452
1453 static void destroy_inodecache(void)
1454 {
1455         kmem_cache_destroy(ufs_inode_cachep);
1456 }
1457
1458 static const struct super_operations ufs_super_ops = {
1459         .alloc_inode    = ufs_alloc_inode,
1460         .destroy_inode  = ufs_destroy_inode,
1461         .write_inode    = ufs_write_inode,
1462         .evict_inode    = ufs_evict_inode,
1463         .put_super      = ufs_put_super,
1464         .write_super    = ufs_write_super,
1465         .sync_fs        = ufs_sync_fs,
1466         .statfs         = ufs_statfs,
1467         .remount_fs     = ufs_remount,
1468         .show_options   = ufs_show_options,
1469 };
1470
1471 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1472         int flags, const char *dev_name, void *data)
1473 {
1474         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1475 }
1476
1477 static struct file_system_type ufs_fs_type = {
1478         .owner          = THIS_MODULE,
1479         .name           = "ufs",
1480         .mount          = ufs_mount,
1481         .kill_sb        = kill_block_super,
1482         .fs_flags       = FS_REQUIRES_DEV,
1483 };
1484
1485 static int __init init_ufs_fs(void)
1486 {
1487         int err = init_inodecache();
1488         if (err)
1489                 goto out1;
1490         err = register_filesystem(&ufs_fs_type);
1491         if (err)
1492                 goto out;
1493         return 0;
1494 out:
1495         destroy_inodecache();
1496 out1:
1497         return err;
1498 }
1499
1500 static void __exit exit_ufs_fs(void)
1501 {
1502         unregister_filesystem(&ufs_fs_type);
1503         destroy_inodecache();
1504 }
1505
1506 module_init(init_ufs_fs)
1507 module_exit(exit_ufs_fs)
1508 MODULE_LICENSE("GPL");