fs/ufs/super.c

   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <gwingerde@gmail.com>
  45  *
  46  * Clean swab support on 19970406 by
  47  * Francois-Rene Rideau <fare@tunes.org>
  48  *
  49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52  *
  53  * NeXTstep support added on February 5th 1998 by
  54  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55  *
  56  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57  *
  58  * HP/UX hfs filesystem support added by
  59  * Martin K. Petersen <mkp@mkp.net>, August 1999
  60  *
  61  * UFS2 (of FreeBSD 5.x) support added by
  62  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63  *
  64  * UFS2 write support added by
  65  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  66  */
  67
  68
  69 #include <linux/exportfs.h>
  70 #include <linux/module.h>
  71 #include <linux/bitops.h>
  72
  73 #include <stdarg.h>
  74
  75 #include <asm/uaccess.h>
  76 #include <asm/system.h>
  77
  78 #include <linux/errno.h>
  79 #include <linux/fs.h>
  80 #include <linux/slab.h>
  81 #include <linux/time.h>
  82 #include <linux/stat.h>
  83 #include <linux/string.h>
  84 #include <linux/blkdev.h>
  85 #include <linux/init.h>
  86 #include <linux/parser.h>
  87 #include <linux/smp_lock.h>
  88 #include <linux/buffer_head.h>
  89 #include <linux/vfs.h>
  90 #include <linux/log2.h>
  91 #include <linux/mount.h>
  92 #include <linux/seq_file.h>
  93
  94 #include "ufs_fs.h"
  95 #include "ufs.h"
  96 #include "swab.h"
  97 #include "util.h"
  98
  99 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 100 {
 101         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 102         struct inode *inode;
 103
 104         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 105                 return ERR_PTR(-ESTALE);
 106
 107         inode = ufs_iget(sb, ino);
 108         if (IS_ERR(inode))
 109                 return ERR_CAST(inode);
 110         if (generation && inode->i_generation != generation) {
 111                 iput(inode);
 112                 return ERR_PTR(-ESTALE);
 113         }
 114         return inode;
 115 }
 116
 117 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 118                                        int fh_len, int fh_type)
 119 {
 120         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 121 }
 122
 123 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 124                                        int fh_len, int fh_type)
 125 {
 126         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 127 }
 128
 129 static struct dentry *ufs_get_parent(struct dentry *child)
 130 {
 131         struct qstr dot_dot = {
 132                 .name   = "..",
 133                 .len    = 2,
 134         };
 135         ino_t ino;
 136
 137         ino = ufs_inode_by_name(child->d_inode, &dot_dot);
 138         if (!ino)
 139                 return ERR_PTR(-ENOENT);
 140         return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
 141 }
 142
 143 static const struct export_operations ufs_export_ops = {
 144         .fh_to_dentry   = ufs_fh_to_dentry,
 145         .fh_to_parent   = ufs_fh_to_parent,
 146         .get_parent     = ufs_get_parent,
 147 };
 148
 149 #ifdef CONFIG_UFS_DEBUG
 150 /*
 151  * Print contents of ufs_super_block, useful for debugging
 152  */
 153 static void ufs_print_super_stuff(struct super_block *sb,
 154                                   struct ufs_super_block_first *usb1,
 155                                   struct ufs_super_block_second *usb2,
 156                                   struct ufs_super_block_third *usb3)
 157 {
 158         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 159
 160         printk("ufs_print_super_stuff\n");
 161         printk("  magic:     0x%x\n", magic);
 162         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 163                 printk("  fs_size:   %llu\n", (unsigned long long)
 164                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 165                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 166                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 167                 printk("  bsize:         %u\n",
 168                        fs32_to_cpu(sb, usb1->fs_bsize));
 169                 printk("  fsize:         %u\n",
 170                        fs32_to_cpu(sb, usb1->fs_fsize));
 171                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 172                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 173                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 174                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 175                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 176                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 177                        (unsigned long long)
 178                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 179                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 180                        (unsigned long long)
 181                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 182                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 183                        (unsigned long long)
 184                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 185                 printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
 186                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 187         } else {
 188                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 189                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 190                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 191                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 192                 printk(" cgoffset:    %u\n",
 193                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 194                 printk(" ~cgmask:     0x%x\n",
 195                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 196                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 197                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 198                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 199                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 200                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 201                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 202                 printk(" fragshift:   %u\n",
 203                        fs32_to_cpu(sb, usb1->fs_fragshift));
 204                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 205                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 206                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 207                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 208                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 209                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 210                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 211                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 212                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 213                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 214                 printk(" fstodb:      %u\n",
 215                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 216                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 217                 printk(" ndir         %u\n",
 218                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 219                 printk(" nifree       %u\n",
 220                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 221                 printk(" nbfree       %u\n",
 222                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 223                 printk(" nffree       %u\n",
 224                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 225         }
 226         printk("\n");
 227 }
 228
 229 /*
 230  * Print contents of ufs_cylinder_group, useful for debugging
 231  */
 232 static void ufs_print_cylinder_stuff(struct super_block *sb,
 233                                      struct ufs_cylinder_group *cg)
 234 {
 235         printk("\nufs_print_cylinder_stuff\n");
 236         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 237         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 238         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 239         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 240         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 241         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 242         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 243         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 244         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 245         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 246         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 247         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 248         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 249         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 250         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 251             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 252             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 253             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 254             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 255         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 256         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 257         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 258         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 259         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 260         printk("  clustersumoff %u\n",
 261                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 262         printk("  clusteroff    %u\n",
 263                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 264         printk("  nclusterblks  %u\n",
 265                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 266         printk("\n");
 267 }
 268 #else
 269 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 270 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 271 #endif /* CONFIG_UFS_DEBUG */
 272
 273 static const struct super_operations ufs_super_ops;
 274
 275 static char error_buf[1024];
 276
 277 void ufs_error (struct super_block * sb, const char * function,
 278         const char * fmt, ...)
 279 {
 280         struct ufs_sb_private_info * uspi;
 281         struct ufs_super_block_first * usb1;
 282         va_list args;
 283
 284         uspi = UFS_SB(sb)->s_uspi;
 285         usb1 = ubh_get_usb_first(uspi);
 286
 287         if (!(sb->s_flags & MS_RDONLY)) {
 288                 usb1->fs_clean = UFS_FSBAD;
 289                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 290                 sb->s_dirt = 1;
 291                 sb->s_flags |= MS_RDONLY;
 292         }
 293         va_start (args, fmt);
 294         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 295         va_end (args);
 296         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 297         case UFS_MOUNT_ONERROR_PANIC:
 298                 panic ("UFS-fs panic (device %s): %s: %s\n",
 299                         sb->s_id, function, error_buf);
 300
 301         case UFS_MOUNT_ONERROR_LOCK:
 302         case UFS_MOUNT_ONERROR_UMOUNT:
 303         case UFS_MOUNT_ONERROR_REPAIR:
 304                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 305                         sb->s_id, function, error_buf);
 306         }
 307 }
 308
 309 void ufs_panic (struct super_block * sb, const char * function,
 310         const char * fmt, ...)
 311 {
 312         struct ufs_sb_private_info * uspi;
 313         struct ufs_super_block_first * usb1;
 314         va_list args;
 315
 316         lock_kernel();
 317         uspi = UFS_SB(sb)->s_uspi;
 318         usb1 = ubh_get_usb_first(uspi);
 319
 320         if (!(sb->s_flags & MS_RDONLY)) {
 321                 usb1->fs_clean = UFS_FSBAD;
 322                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 323                 sb->s_dirt = 1;
 324         }
 325         va_start (args, fmt);
 326         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 327         va_end (args);
 328         sb->s_flags |= MS_RDONLY;
 329         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 330                 sb->s_id, function, error_buf);
 331 }
 332
 333 void ufs_warning (struct super_block * sb, const char * function,
 334         const char * fmt, ...)
 335 {
 336         va_list args;
 337
 338         va_start (args, fmt);
 339         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 340         va_end (args);
 341         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 342                 sb->s_id, function, error_buf);
 343 }
 344
 345 enum {
 346        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 347        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 348        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 349        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 350        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 351        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 352        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 353        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 354        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 355        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 356        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 357        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 358        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 359        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 360        Opt_err
 361 };
 362
 363 static const match_table_t tokens = {
 364         {Opt_type_old, "ufstype=old"},
 365         {Opt_type_sunx86, "ufstype=sunx86"},
 366         {Opt_type_sun, "ufstype=sun"},
 367         {Opt_type_sunos, "ufstype=sunos"},
 368         {Opt_type_44bsd, "ufstype=44bsd"},
 369         {Opt_type_ufs2, "ufstype=ufs2"},
 370         {Opt_type_ufs2, "ufstype=5xbsd"},
 371         {Opt_type_hp, "ufstype=hp"},
 372         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 373         {Opt_type_nextstep, "ufstype=nextstep"},
 374         {Opt_type_openstep, "ufstype=openstep"},
 375 /*end of possible ufs types */
 376         {Opt_onerror_panic, "onerror=panic"},
 377         {Opt_onerror_lock, "onerror=lock"},
 378         {Opt_onerror_umount, "onerror=umount"},
 379         {Opt_onerror_repair, "onerror=repair"},
 380         {Opt_err, NULL}
 381 };
 382
 383 static int ufs_parse_options (char * options, unsigned * mount_options)
 384 {
 385         char * p;
 386
 387         UFSD("ENTER\n");
 388
 389         if (!options)
 390                 return 1;
 391
 392         while ((p = strsep(&options, ",")) != NULL) {
 393                 substring_t args[MAX_OPT_ARGS];
 394                 int token;
 395                 if (!*p)
 396                         continue;
 397
 398                 token = match_token(p, tokens, args);
 399                 switch (token) {
 400                 case Opt_type_old:
 401                         ufs_clear_opt (*mount_options, UFSTYPE);
 402                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 403                         break;
 404                 case Opt_type_sunx86:
 405                         ufs_clear_opt (*mount_options, UFSTYPE);
 406                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 407                         break;
 408                 case Opt_type_sun:
 409                         ufs_clear_opt (*mount_options, UFSTYPE);
 410                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 411                         break;
 412                 case Opt_type_sunos:
 413                         ufs_clear_opt(*mount_options, UFSTYPE);
 414                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 415                         break;
 416                 case Opt_type_44bsd:
 417                         ufs_clear_opt (*mount_options, UFSTYPE);
 418                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 419                         break;
 420                 case Opt_type_ufs2:
 421                         ufs_clear_opt(*mount_options, UFSTYPE);
 422                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 423                         break;
 424                 case Opt_type_hp:
 425                         ufs_clear_opt (*mount_options, UFSTYPE);
 426                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 427                         break;
 428                 case Opt_type_nextstepcd:
 429                         ufs_clear_opt (*mount_options, UFSTYPE);
 430                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 431                         break;
 432                 case Opt_type_nextstep:
 433                         ufs_clear_opt (*mount_options, UFSTYPE);
 434                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 435                         break;
 436                 case Opt_type_openstep:
 437                         ufs_clear_opt (*mount_options, UFSTYPE);
 438                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 439                         break;
 440                 case Opt_onerror_panic:
 441                         ufs_clear_opt (*mount_options, ONERROR);
 442                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 443                         break;
 444                 case Opt_onerror_lock:
 445                         ufs_clear_opt (*mount_options, ONERROR);
 446                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 447                         break;
 448                 case Opt_onerror_umount:
 449                         ufs_clear_opt (*mount_options, ONERROR);
 450                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 451                         break;
 452                 case Opt_onerror_repair:
 453                         printk("UFS-fs: Unable to do repair on error, "
 454                                 "will lock lock instead\n");
 455                         ufs_clear_opt (*mount_options, ONERROR);
 456                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 457                         break;
 458                 default:
 459                         printk("UFS-fs: Invalid option: \"%s\" "
 460                                         "or missing value\n", p);
 461                         return 0;
 462                 }
 463         }
 464         return 1;
 465 }
 466
 467 /*
 468  * Diffrent types of UFS hold fs_cstotal in different
 469  * places, and use diffrent data structure for it.
 470  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
 471  */
 472 static void ufs_setup_cstotal(struct super_block *sb)
 473 {
 474         struct ufs_sb_info *sbi = UFS_SB(sb);
 475         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 476         struct ufs_super_block_first *usb1;
 477         struct ufs_super_block_second *usb2;
 478         struct ufs_super_block_third *usb3;
 479         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 480
 481         UFSD("ENTER, mtype=%u\n", mtype);
 482         usb1 = ubh_get_usb_first(uspi);
 483         usb2 = ubh_get_usb_second(uspi);
 484         usb3 = ubh_get_usb_third(uspi);
 485
 486         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 487              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 488             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 489                 /*we have statistic in different place, then usual*/
 490                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 491                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 492                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 493                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 494         } else {
 495                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 496                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 497                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 498                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 499         }
 500         UFSD("EXIT\n");
 501 }
 502
 503 /*
 504  * Read on-disk structures associated with cylinder groups
 505  */
 506 static int ufs_read_cylinder_structures(struct super_block *sb)
 507 {
 508         struct ufs_sb_info *sbi = UFS_SB(sb);
 509         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 510         struct ufs_buffer_head * ubh;
 511         unsigned char * base, * space;
 512         unsigned size, blks, i;
 513         struct ufs_super_block_third *usb3;
 514
 515         UFSD("ENTER\n");
 516
 517         usb3 = ubh_get_usb_third(uspi);
 518         /*
 519          * Read cs structures from (usually) first data block
 520          * on the device.
 521          */
 522         size = uspi->s_cssize;
 523         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 524         base = space = kmalloc(size, GFP_KERNEL);
 525         if (!base)
 526                 goto failed;
 527         sbi->s_csp = (struct ufs_csum *)space;
 528         for (i = 0; i < blks; i += uspi->s_fpb) {
 529                 size = uspi->s_bsize;
 530                 if (i + uspi->s_fpb > blks)
 531                         size = (blks - i) * uspi->s_fsize;
 532
 533                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 534
 535                 if (!ubh)
 536                         goto failed;
 537
 538                 ubh_ubhcpymem (space, ubh, size);
 539
 540                 space += size;
 541                 ubh_brelse (ubh);
 542                 ubh = NULL;
 543         }
 544
 545         /*
 546          * Read cylinder group (we read only first fragment from block
 547          * at this time) and prepare internal data structures for cg caching.
 548          */
 549         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 550                 goto failed;
 551         for (i = 0; i < uspi->s_ncg; i++)
 552                 sbi->s_ucg[i] = NULL;
 553         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 554                 sbi->s_ucpi[i] = NULL;
 555                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 556         }
 557         for (i = 0; i < uspi->s_ncg; i++) {
 558                 UFSD("read cg %u\n", i);
 559                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 560                         goto failed;
 561                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 562                         goto failed;
 563
 564                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 565         }
 566         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 567                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 568                         goto failed;
 569                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 570         }
 571         sbi->s_cg_loaded = 0;
 572         UFSD("EXIT\n");
 573         return 1;
 574
 575 failed:
 576         kfree (base);
 577         if (sbi->s_ucg) {
 578                 for (i = 0; i < uspi->s_ncg; i++)
 579                         if (sbi->s_ucg[i])
 580                                 brelse (sbi->s_ucg[i]);
 581                 kfree (sbi->s_ucg);
 582                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 583                         kfree (sbi->s_ucpi[i]);
 584         }
 585         UFSD("EXIT (FAILED)\n");
 586         return 0;
 587 }
 588
 589 /*
 590  * Sync our internal copy of fs_cstotal with disk
 591  */
 592 static void ufs_put_cstotal(struct super_block *sb)
 593 {
 594         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 595         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 596         struct ufs_super_block_first *usb1;
 597         struct ufs_super_block_second *usb2;
 598         struct ufs_super_block_third *usb3;
 599
 600         UFSD("ENTER\n");
 601         usb1 = ubh_get_usb_first(uspi);
 602         usb2 = ubh_get_usb_second(uspi);
 603         usb3 = ubh_get_usb_third(uspi);
 604
 605         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 606              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 607             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 608                 /*we have statistic in different place, then usual*/
 609                 usb2->fs_un.fs_u2.cs_ndir =
 610                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 611                 usb2->fs_un.fs_u2.cs_nbfree =
 612                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 613                 usb3->fs_un1.fs_u2.cs_nifree =
 614                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 615                 usb3->fs_un1.fs_u2.cs_nffree =
 616                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 617         } else {
 618                 usb1->fs_cstotal.cs_ndir =
 619                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 620                 usb1->fs_cstotal.cs_nbfree =
 621                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 622                 usb1->fs_cstotal.cs_nifree =
 623                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 624                 usb1->fs_cstotal.cs_nffree =
 625                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 626         }
 627         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 628         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 629         UFSD("EXIT\n");
 630 }
 631
 632 /**
 633  * ufs_put_super_internal() - put on-disk intrenal structures
 634  * @sb: pointer to super_block structure
 635  * Put on-disk structures associated with cylinder groups
 636  * and write them back to disk, also update cs_total on disk
 637  */
 638 static void ufs_put_super_internal(struct super_block *sb)
 639 {
 640         struct ufs_sb_info *sbi = UFS_SB(sb);
 641         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 642         struct ufs_buffer_head * ubh;
 643         unsigned char * base, * space;
 644         unsigned blks, size, i;
 645
 646
 647         UFSD("ENTER\n");
 648
 649         lock_kernel();
 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         unlock_kernel();
 680
 681         UFSD("EXIT\n");
 682 }
 683
 684 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 685 {
 686         struct ufs_sb_info * sbi;
 687         struct ufs_sb_private_info * uspi;
 688         struct ufs_super_block_first * usb1;
 689         struct ufs_super_block_second * usb2;
 690         struct ufs_super_block_third * usb3;
 691         struct ufs_buffer_head * ubh;
 692         struct inode *inode;
 693         unsigned block_size, super_block_size;
 694         unsigned flags;
 695         unsigned super_block_offset;
 696         unsigned maxsymlen;
 697         int ret = -EINVAL;
 698
 699         lock_kernel();
 700
 701         uspi = NULL;
 702         ubh = NULL;
 703         flags = 0;
 704
 705         UFSD("ENTER\n");
 706
 707         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 708         if (!sbi)
 709                 goto failed_nomem;
 710         sb->s_fs_info = sbi;
 711
 712         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 713
 714 #ifndef CONFIG_UFS_FS_WRITE
 715         if (!(sb->s_flags & MS_RDONLY)) {
 716                 printk("ufs was compiled with read-only support, "
 717                 "can't be mounted as read-write\n");
 718                 goto failed;
 719         }
 720 #endif
 721         /*
 722          * Set default mount options
 723          * Parse mount options
 724          */
 725         sbi->s_mount_opt = 0;
 726         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 727         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 728                 printk("wrong mount options\n");
 729                 goto failed;
 730         }
 731         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 732                 if (!silent)
 733                         printk("You didn't specify the type of your ufs filesystem\n\n"
 734                         "mount -t ufs -o ufstype="
 735                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 736                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 737                         "default is ufstype=old\n");
 738                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 739         }
 740
 741         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 742         sbi->s_uspi = uspi;
 743         if (!uspi)
 744                 goto failed;
 745         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 746         super_block_offset=UFS_SBLOCK;
 747
 748         /* Keep 2Gig file limit. Some UFS variants need to override
 749            this but as I don't know which I'll let those in the know loosen
 750            the rules */
 751         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 752         case UFS_MOUNT_UFSTYPE_44BSD:
 753                 UFSD("ufstype=44bsd\n");
 754                 uspi->s_fsize = block_size = 512;
 755                 uspi->s_fmask = ~(512 - 1);
 756                 uspi->s_fshift = 9;
 757                 uspi->s_sbsize = super_block_size = 1536;
 758                 uspi->s_sbbase = 0;
 759                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 760                 break;
 761         case UFS_MOUNT_UFSTYPE_UFS2:
 762                 UFSD("ufstype=ufs2\n");
 763                 super_block_offset=SBLOCK_UFS2;
 764                 uspi->s_fsize = block_size = 512;
 765                 uspi->s_fmask = ~(512 - 1);
 766                 uspi->s_fshift = 9;
 767                 uspi->s_sbsize = super_block_size = 1536;
 768                 uspi->s_sbbase =  0;
 769                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 770                 break;
 771
 772         case UFS_MOUNT_UFSTYPE_SUN:
 773                 UFSD("ufstype=sun\n");
 774                 uspi->s_fsize = block_size = 1024;
 775                 uspi->s_fmask = ~(1024 - 1);
 776                 uspi->s_fshift = 10;
 777                 uspi->s_sbsize = super_block_size = 2048;
 778                 uspi->s_sbbase = 0;
 779                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 780                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 781                 break;
 782
 783         case UFS_MOUNT_UFSTYPE_SUNOS:
 784                 UFSD(("ufstype=sunos\n"))
 785                 uspi->s_fsize = block_size = 1024;
 786                 uspi->s_fmask = ~(1024 - 1);
 787                 uspi->s_fshift = 10;
 788                 uspi->s_sbsize = 2048;
 789                 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_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 793                 break;
 794
 795         case UFS_MOUNT_UFSTYPE_SUNx86:
 796                 UFSD("ufstype=sunx86\n");
 797                 uspi->s_fsize = block_size = 1024;
 798                 uspi->s_fmask = ~(1024 - 1);
 799                 uspi->s_fshift = 10;
 800                 uspi->s_sbsize = super_block_size = 2048;
 801                 uspi->s_sbbase = 0;
 802                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 803                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 804                 break;
 805
 806         case UFS_MOUNT_UFSTYPE_OLD:
 807                 UFSD("ufstype=old\n");
 808                 uspi->s_fsize = block_size = 1024;
 809                 uspi->s_fmask = ~(1024 - 1);
 810                 uspi->s_fshift = 10;
 811                 uspi->s_sbsize = super_block_size = 2048;
 812                 uspi->s_sbbase = 0;
 813                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 814                 if (!(sb->s_flags & MS_RDONLY)) {
 815                         if (!silent)
 816                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 817                         sb->s_flags |= MS_RDONLY;
 818                 }
 819                 break;
 820
 821         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 822                 UFSD("ufstype=nextstep\n");
 823                 uspi->s_fsize = block_size = 1024;
 824                 uspi->s_fmask = ~(1024 - 1);
 825                 uspi->s_fshift = 10;
 826                 uspi->s_sbsize = super_block_size = 2048;
 827                 uspi->s_sbbase = 0;
 828                 uspi->s_dirblksize = 1024;
 829                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 830                 if (!(sb->s_flags & MS_RDONLY)) {
 831                         if (!silent)
 832                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 833                         sb->s_flags |= MS_RDONLY;
 834                 }
 835                 break;
 836
 837         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 838                 UFSD("ufstype=nextstep-cd\n");
 839                 uspi->s_fsize = block_size = 2048;
 840                 uspi->s_fmask = ~(2048 - 1);
 841                 uspi->s_fshift = 11;
 842                 uspi->s_sbsize = super_block_size = 2048;
 843                 uspi->s_sbbase = 0;
 844                 uspi->s_dirblksize = 1024;
 845                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 846                 if (!(sb->s_flags & MS_RDONLY)) {
 847                         if (!silent)
 848                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 849                         sb->s_flags |= MS_RDONLY;
 850                 }
 851                 break;
 852
 853         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 854                 UFSD("ufstype=openstep\n");
 855                 uspi->s_fsize = block_size = 1024;
 856                 uspi->s_fmask = ~(1024 - 1);
 857                 uspi->s_fshift = 10;
 858                 uspi->s_sbsize = super_block_size = 2048;
 859                 uspi->s_sbbase = 0;
 860                 uspi->s_dirblksize = 1024;
 861                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 862                 if (!(sb->s_flags & MS_RDONLY)) {
 863                         if (!silent)
 864                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 865                         sb->s_flags |= MS_RDONLY;
 866                 }
 867                 break;
 868
 869         case UFS_MOUNT_UFSTYPE_HP:
 870                 UFSD("ufstype=hp\n");
 871                 uspi->s_fsize = block_size = 1024;
 872                 uspi->s_fmask = ~(1024 - 1);
 873                 uspi->s_fshift = 10;
 874                 uspi->s_sbsize = super_block_size = 2048;
 875                 uspi->s_sbbase = 0;
 876                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 877                 if (!(sb->s_flags & MS_RDONLY)) {
 878                         if (!silent)
 879                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 880                         sb->s_flags |= MS_RDONLY;
 881                 }
 882                 break;
 883         default:
 884                 if (!silent)
 885                         printk("unknown ufstype\n");
 886                 goto failed;
 887         }
 888
 889 again:
 890         if (!sb_set_blocksize(sb, block_size)) {
 891                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 892                 goto failed;
 893         }
 894
 895         /*
 896          * read ufs super block from device
 897          */
 898
 899         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 900
 901         if (!ubh)
 902             goto failed;
 903
 904         usb1 = ubh_get_usb_first(uspi);
 905         usb2 = ubh_get_usb_second(uspi);
 906         usb3 = ubh_get_usb_third(uspi);
 907
 908         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 909         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 910         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 911             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 912                 flags &= ~UFS_ST_MASK;
 913                 flags |=  UFS_ST_SUN;
 914         }
 915
 916         /*
 917          * Check ufs magic number
 918          */
 919         sbi->s_bytesex = BYTESEX_LE;
 920         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 921                 case UFS_MAGIC:
 922                 case UFS_MAGIC_BW:
 923                 case UFS2_MAGIC:
 924                 case UFS_MAGIC_LFN:
 925                 case UFS_MAGIC_FEA:
 926                 case UFS_MAGIC_4GB:
 927                         goto magic_found;
 928         }
 929         sbi->s_bytesex = BYTESEX_BE;
 930         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 931                 case UFS_MAGIC:
 932                 case UFS_MAGIC_BW:
 933                 case UFS2_MAGIC:
 934                 case UFS_MAGIC_LFN:
 935                 case UFS_MAGIC_FEA:
 936                 case UFS_MAGIC_4GB:
 937                         goto magic_found;
 938         }
 939
 940         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 941           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 942           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 943           && uspi->s_sbbase < 256) {
 944                 ubh_brelse_uspi(uspi);
 945                 ubh = NULL;
 946                 uspi->s_sbbase += 8;
 947                 goto again;
 948         }
 949         if (!silent)
 950                 printk("ufs_read_super: bad magic number\n");
 951         goto failed;
 952
 953 magic_found:
 954         /*
 955          * Check block and fragment sizes
 956          */
 957         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 958         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 959         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 960         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 961         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 962
 963         if (!is_power_of_2(uspi->s_fsize)) {
 964                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 965                         uspi->s_fsize);
 966                         goto failed;
 967         }
 968         if (uspi->s_fsize < 512) {
 969                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 970                         uspi->s_fsize);
 971                 goto failed;
 972         }
 973         if (uspi->s_fsize > 4096) {
 974                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 975                         uspi->s_fsize);
 976                 goto failed;
 977         }
 978         if (!is_power_of_2(uspi->s_bsize)) {
 979                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 980                         uspi->s_bsize);
 981                 goto failed;
 982         }
 983         if (uspi->s_bsize < 4096) {
 984                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 985                         uspi->s_bsize);
 986                 goto failed;
 987         }
 988         if (uspi->s_bsize / uspi->s_fsize > 8) {
 989                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 990                         uspi->s_bsize / uspi->s_fsize);
 991                 goto failed;
 992         }
 993         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 994                 ubh_brelse_uspi(uspi);
 995                 ubh = NULL;
 996                 block_size = uspi->s_fsize;
 997                 super_block_size = uspi->s_sbsize;
 998                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 999                 goto again;
1000         }
1001
1002         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1003         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1004
1005         /*
1006          * Check, if file system was correctly unmounted.
1007          * If not, make it read only.
1008          */
1009         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1010           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1011           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1012             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1013           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1014           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1015                 switch(usb1->fs_clean) {
1016                 case UFS_FSCLEAN:
1017                         UFSD("fs is clean\n");
1018                         break;
1019                 case UFS_FSSTABLE:
1020                         UFSD("fs is stable\n");
1021                         break;
1022                 case UFS_FSLOG:
1023                         UFSD("fs is logging fs\n");
1024                         break;
1025                 case UFS_FSOSF1:
1026                         UFSD("fs is DEC OSF/1\n");
1027                         break;
1028                 case UFS_FSACTIVE:
1029                         printk("ufs_read_super: fs is active\n");
1030                         sb->s_flags |= MS_RDONLY;
1031                         break;
1032                 case UFS_FSBAD:
1033                         printk("ufs_read_super: fs is bad\n");
1034                         sb->s_flags |= MS_RDONLY;
1035                         break;
1036                 default:
1037                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1038                         sb->s_flags |= MS_RDONLY;
1039                         break;
1040                 }
1041         } else {
1042                 printk("ufs_read_super: fs needs fsck\n");
1043                 sb->s_flags |= MS_RDONLY;
1044         }
1045
1046         /*
1047          * Read ufs_super_block into internal data structures
1048          */
1049         sb->s_op = &ufs_super_ops;
1050         sb->s_export_op = &ufs_export_ops;
1051
1052         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1053
1054         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1055         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1056         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1057         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1058         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1059         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1060
1061         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1062                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1063                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1064         } else {
1065                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1066                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1067         }
1068
1069         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1070         /* s_bsize already set */
1071         /* s_fsize already set */
1072         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1073         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1074         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1075         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1076         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1077         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1078         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1079                 uspi->s_fshift);
1080         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1081         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1082         /* s_sbsize already set */
1083         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1084         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1085         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1086         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1087         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1088         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1089         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1090         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1091
1092         if (uspi->fs_magic == UFS2_MAGIC)
1093                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1094         else
1095                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1096
1097         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1098         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1099         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1100         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1101         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1102         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1103         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1104         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1105         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1106         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1107         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1108         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1109         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1110         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1111
1112         /*
1113          * Compute another frequently used values
1114          */
1115         uspi->s_fpbmask = uspi->s_fpb - 1;
1116         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1117                 uspi->s_apbshift = uspi->s_bshift - 3;
1118         else
1119                 uspi->s_apbshift = uspi->s_bshift - 2;
1120
1121         uspi->s_2apbshift = uspi->s_apbshift * 2;
1122         uspi->s_3apbshift = uspi->s_apbshift * 3;
1123         uspi->s_apb = 1 << uspi->s_apbshift;
1124         uspi->s_2apb = 1 << uspi->s_2apbshift;
1125         uspi->s_3apb = 1 << uspi->s_3apbshift;
1126         uspi->s_apbmask = uspi->s_apb - 1;
1127         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1128         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1129         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1130         uspi->s_bpf = uspi->s_fsize << 3;
1131         uspi->s_bpfshift = uspi->s_fshift + 3;
1132         uspi->s_bpfmask = uspi->s_bpf - 1;
1133         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1134             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1135                 uspi->s_maxsymlinklen =
1136                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1137
1138         if (uspi->fs_magic == UFS2_MAGIC)
1139                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1140         else
1141                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1142         if (uspi->s_maxsymlinklen > maxsymlen) {
1143                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1144                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1145                 uspi->s_maxsymlinklen = maxsymlen;
1146         }
1147
1148         inode = ufs_iget(sb, UFS_ROOTINO);
1149         if (IS_ERR(inode)) {
1150                 ret = PTR_ERR(inode);
1151                 goto failed;
1152         }
1153         sb->s_root = d_alloc_root(inode);
1154         if (!sb->s_root) {
1155                 ret = -ENOMEM;
1156                 goto dalloc_failed;
1157         }
1158
1159         ufs_setup_cstotal(sb);
1160         /*
1161          * Read cylinder group structures
1162          */
1163         if (!(sb->s_flags & MS_RDONLY))
1164                 if (!ufs_read_cylinder_structures(sb))
1165                         goto failed;
1166
1167         UFSD("EXIT\n");
1168         unlock_kernel();
1169         return 0;
1170
1171 dalloc_failed:
1172         iput(inode);
1173 failed:
1174         if (ubh)
1175                 ubh_brelse_uspi (uspi);
1176         kfree (uspi);
1177         kfree(sbi);
1178         sb->s_fs_info = NULL;
1179         UFSD("EXIT (FAILED)\n");
1180         unlock_kernel();
1181         return ret;
1182
1183 failed_nomem:
1184         UFSD("EXIT (NOMEM)\n");
1185         unlock_kernel();
1186         return -ENOMEM;
1187 }
1188
1189 static int ufs_sync_fs(struct super_block *sb, int wait)
1190 {
1191         struct ufs_sb_private_info * uspi;
1192         struct ufs_super_block_first * usb1;
1193         struct ufs_super_block_third * usb3;
1194         unsigned flags;
1195
1196         lock_super(sb);
1197         lock_kernel();
1198
1199         UFSD("ENTER\n");
1200
1201         flags = UFS_SB(sb)->s_flags;
1202         uspi = UFS_SB(sb)->s_uspi;
1203         usb1 = ubh_get_usb_first(uspi);
1204         usb3 = ubh_get_usb_third(uspi);
1205
1206         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1207         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
1208             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1209             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1210                 ufs_set_fs_state(sb, usb1, usb3,
1211                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1212         ufs_put_cstotal(sb);
1213         sb->s_dirt = 0;
1214
1215         UFSD("EXIT\n");
1216         unlock_kernel();
1217         unlock_super(sb);
1218
1219         return 0;
1220 }
1221
1222 static void ufs_write_super(struct super_block *sb)
1223 {
1224         if (!(sb->s_flags & MS_RDONLY))
1225                 ufs_sync_fs(sb, 1);
1226         else
1227                 sb->s_dirt = 0;
1228 }
1229
1230 static void ufs_put_super(struct super_block *sb)
1231 {
1232         struct ufs_sb_info * sbi = UFS_SB(sb);
1233
1234         UFSD("ENTER\n");
1235
1236         if (sb->s_dirt)
1237                 ufs_write_super(sb);
1238
1239         if (!(sb->s_flags & MS_RDONLY))
1240                 ufs_put_super_internal(sb);
1241
1242         ubh_brelse_uspi (sbi->s_uspi);
1243         kfree (sbi->s_uspi);
1244         kfree (sbi);
1245         sb->s_fs_info = NULL;
1246         UFSD("EXIT\n");
1247         return;
1248 }
1249
1250
1251 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1252 {
1253         struct ufs_sb_private_info * uspi;
1254         struct ufs_super_block_first * usb1;
1255         struct ufs_super_block_third * usb3;
1256         unsigned new_mount_opt, ufstype;
1257         unsigned flags;
1258
1259         lock_kernel();
1260         lock_super(sb);
1261         uspi = UFS_SB(sb)->s_uspi;
1262         flags = UFS_SB(sb)->s_flags;
1263         usb1 = ubh_get_usb_first(uspi);
1264         usb3 = ubh_get_usb_third(uspi);
1265
1266         /*
1267          * Allow the "check" option to be passed as a remount option.
1268          * It is not possible to change ufstype option during remount
1269          */
1270         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1271         new_mount_opt = 0;
1272         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1273         if (!ufs_parse_options (data, &new_mount_opt)) {
1274                 unlock_super(sb);
1275                 unlock_kernel();
1276                 return -EINVAL;
1277         }
1278         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1279                 new_mount_opt |= ufstype;
1280         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1281                 printk("ufstype can't be changed during remount\n");
1282                 unlock_super(sb);
1283                 unlock_kernel();
1284                 return -EINVAL;
1285         }
1286
1287         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1288                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1289                 unlock_super(sb);
1290                 unlock_kernel();
1291                 return 0;
1292         }
1293
1294         /*
1295          * fs was mouted as rw, remounting ro
1296          */
1297         if (*mount_flags & MS_RDONLY) {
1298                 ufs_put_super_internal(sb);
1299                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1300                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1301                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1302                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1303                         ufs_set_fs_state(sb, usb1, usb3,
1304                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1305                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1306                 sb->s_dirt = 0;
1307                 sb->s_flags |= MS_RDONLY;
1308         } else {
1309         /*
1310          * fs was mounted as ro, remounting rw
1311          */
1312 #ifndef CONFIG_UFS_FS_WRITE
1313                 printk("ufs was compiled with read-only support, "
1314                 "can't be mounted as read-write\n");
1315                 unlock_super(sb);
1316                 unlock_kernel();
1317                 return -EINVAL;
1318 #else
1319                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1320                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1321                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1322                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1323                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1324                         printk("this ufstype is read-only supported\n");
1325                         unlock_super(sb);
1326                         unlock_kernel();
1327                         return -EINVAL;
1328                 }
1329                 if (!ufs_read_cylinder_structures(sb)) {
1330                         printk("failed during remounting\n");
1331                         unlock_super(sb);
1332                         unlock_kernel();
1333                         return -EPERM;
1334                 }
1335                 sb->s_flags &= ~MS_RDONLY;
1336 #endif
1337         }
1338         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1339         unlock_super(sb);
1340         unlock_kernel();
1341         return 0;
1342 }
1343
1344 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1345 {
1346         struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1347         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1348         const struct match_token *tp = tokens;
1349
1350         while (tp->token != Opt_onerror_panic && tp->token != mval)
1351                 ++tp;
1352         BUG_ON(tp->token == Opt_onerror_panic);
1353         seq_printf(seq, ",%s", tp->pattern);
1354
1355         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1356         while (tp->token != Opt_err && tp->token != mval)
1357                 ++tp;
1358         BUG_ON(tp->token == Opt_err);
1359         seq_printf(seq, ",%s", tp->pattern);
1360
1361         return 0;
1362 }
1363
1364 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1365 {
1366         struct super_block *sb = dentry->d_sb;
1367         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1368         unsigned  flags = UFS_SB(sb)->s_flags;
1369         struct ufs_super_block_first *usb1;
1370         struct ufs_super_block_second *usb2;
1371         struct ufs_super_block_third *usb3;
1372         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1373
1374         lock_kernel();
1375
1376         usb1 = ubh_get_usb_first(uspi);
1377         usb2 = ubh_get_usb_second(uspi);
1378         usb3 = ubh_get_usb_third(uspi);
1379
1380         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1381                 buf->f_type = UFS2_MAGIC;
1382                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1383         } else {
1384                 buf->f_type = UFS_MAGIC;
1385                 buf->f_blocks = uspi->s_dsize;
1386         }
1387         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1388                 uspi->cs_total.cs_nffree;
1389         buf->f_ffree = uspi->cs_total.cs_nifree;
1390         buf->f_bsize = sb->s_blocksize;
1391         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1392                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1393         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1394         buf->f_namelen = UFS_MAXNAMLEN;
1395         buf->f_fsid.val[0] = (u32)id;
1396         buf->f_fsid.val[1] = (u32)(id >> 32);
1397
1398         unlock_kernel();
1399
1400         return 0;
1401 }
1402
1403 static struct kmem_cache * ufs_inode_cachep;
1404
1405 static struct inode *ufs_alloc_inode(struct super_block *sb)
1406 {
1407         struct ufs_inode_info *ei;
1408         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1409         if (!ei)
1410                 return NULL;
1411         ei->vfs_inode.i_version = 1;
1412         return &ei->vfs_inode;
1413 }
1414
1415 static void ufs_destroy_inode(struct inode *inode)
1416 {
1417         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1418 }
1419
1420 static void init_once(void *foo)
1421 {
1422         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1423
1424         inode_init_once(&ei->vfs_inode);
1425 }
1426
1427 static int init_inodecache(void)
1428 {
1429         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1430                                              sizeof(struct ufs_inode_info),
1431                                              0, (SLAB_RECLAIM_ACCOUNT|
1432                                                 SLAB_MEM_SPREAD),
1433                                              init_once);
1434         if (ufs_inode_cachep == NULL)
1435                 return -ENOMEM;
1436         return 0;
1437 }
1438
1439 static void destroy_inodecache(void)
1440 {
1441         kmem_cache_destroy(ufs_inode_cachep);
1442 }
1443
1444 static const struct super_operations ufs_super_ops = {
1445         .alloc_inode    = ufs_alloc_inode,
1446         .destroy_inode  = ufs_destroy_inode,
1447         .write_inode    = ufs_write_inode,
1448         .evict_inode    = ufs_evict_inode,
1449         .put_super      = ufs_put_super,
1450         .write_super    = ufs_write_super,
1451         .sync_fs        = ufs_sync_fs,
1452         .statfs         = ufs_statfs,
1453         .remount_fs     = ufs_remount,
1454         .show_options   = ufs_show_options,
1455 };
1456
1457 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1458         int flags, const char *dev_name, void *data)
1459 {
1460         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1461 }
1462
1463 static struct file_system_type ufs_fs_type = {
1464         .owner          = THIS_MODULE,
1465         .name           = "ufs",
1466         .mount          = ufs_mount,
1467         .kill_sb        = kill_block_super,
1468         .fs_flags       = FS_REQUIRES_DEV,
1469 };
1470
1471 static int __init init_ufs_fs(void)
1472 {
1473         int err = init_inodecache();
1474         if (err)
1475                 goto out1;
1476         err = register_filesystem(&ufs_fs_type);
1477         if (err)
1478                 goto out;
1479         return 0;
1480 out:
1481         destroy_inodecache();
1482 out1:
1483         return err;
1484 }
1485
1486 static void __exit exit_ufs_fs(void)
1487 {
1488         unregister_filesystem(&ufs_fs_type);
1489         destroy_inodecache();
1490 }
1491
1492 module_init(init_ufs_fs)
1493 module_exit(exit_ufs_fs)
1494 MODULE_LICENSE("GPL");