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/quotaops.h>
  81 #include <linux/slab.h>
  82 #include <linux/time.h>
  83 #include <linux/stat.h>
  84 #include <linux/string.h>
  85 #include <linux/blkdev.h>
  86 #include <linux/init.h>
  87 #include <linux/parser.h>
  88 #include <linux/smp_lock.h>
  89 #include <linux/buffer_head.h>
  90 #include <linux/vfs.h>
  91 #include <linux/log2.h>
  92 #include <linux/mount.h>
  93 #include <linux/seq_file.h>
  94
  95 #include "ufs_fs.h"
  96 #include "ufs.h"
  97 #include "swab.h"
  98 #include "util.h"
  99
 100 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 101 {
 102         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 103         struct inode *inode;
 104
 105         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 106                 return ERR_PTR(-ESTALE);
 107
 108         inode = ufs_iget(sb, ino);
 109         if (IS_ERR(inode))
 110                 return ERR_CAST(inode);
 111         if (generation && inode->i_generation != generation) {
 112                 iput(inode);
 113                 return ERR_PTR(-ESTALE);
 114         }
 115         return inode;
 116 }
 117
 118 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 119                                        int fh_len, int fh_type)
 120 {
 121         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 122 }
 123
 124 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 125                                        int fh_len, int fh_type)
 126 {
 127         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 128 }
 129
 130 static struct dentry *ufs_get_parent(struct dentry *child)
 131 {
 132         struct qstr dot_dot = {
 133                 .name   = "..",
 134                 .len    = 2,
 135         };
 136         ino_t ino;
 137
 138         ino = ufs_inode_by_name(child->d_inode, &dot_dot);
 139         if (!ino)
 140                 return ERR_PTR(-ENOENT);
 141         return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
 142 }
 143
 144 static const struct export_operations ufs_export_ops = {
 145         .fh_to_dentry   = ufs_fh_to_dentry,
 146         .fh_to_parent   = ufs_fh_to_parent,
 147         .get_parent     = ufs_get_parent,
 148 };
 149
 150 #ifdef CONFIG_UFS_DEBUG
 151 /*
 152  * Print contents of ufs_super_block, useful for debugging
 153  */
 154 static void ufs_print_super_stuff(struct super_block *sb,
 155                                   struct ufs_super_block_first *usb1,
 156                                   struct ufs_super_block_second *usb2,
 157                                   struct ufs_super_block_third *usb3)
 158 {
 159         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 160
 161         printk("ufs_print_super_stuff\n");
 162         printk("  magic:     0x%x\n", magic);
 163         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 164                 printk("  fs_size:   %llu\n", (unsigned long long)
 165                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 166                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 167                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 168                 printk("  bsize:         %u\n",
 169                        fs32_to_cpu(sb, usb1->fs_bsize));
 170                 printk("  fsize:         %u\n",
 171                        fs32_to_cpu(sb, usb1->fs_fsize));
 172                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 173                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 174                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 175                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 176                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 177                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 178                        (unsigned long long)
 179                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 180                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 181                        (unsigned long long)
 182                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 183                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 184                        (unsigned long long)
 185                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 186                 printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
 187                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 188         } else {
 189                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 190                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 191                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 192                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 193                 printk(" cgoffset:    %u\n",
 194                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 195                 printk(" ~cgmask:     0x%x\n",
 196                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 197                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 198                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 199                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 200                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 201                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 202                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 203                 printk(" fragshift:   %u\n",
 204                        fs32_to_cpu(sb, usb1->fs_fragshift));
 205                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 206                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 207                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 208                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 209                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 210                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 211                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 212                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 213                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 214                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 215                 printk(" fstodb:      %u\n",
 216                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 217                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 218                 printk(" ndir         %u\n",
 219                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 220                 printk(" nifree       %u\n",
 221                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 222                 printk(" nbfree       %u\n",
 223                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 224                 printk(" nffree       %u\n",
 225                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 226         }
 227         printk("\n");
 228 }
 229
 230 /*
 231  * Print contents of ufs_cylinder_group, useful for debugging
 232  */
 233 static void ufs_print_cylinder_stuff(struct super_block *sb,
 234                                      struct ufs_cylinder_group *cg)
 235 {
 236         printk("\nufs_print_cylinder_stuff\n");
 237         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 238         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 239         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 240         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 241         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 242         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 243         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 244         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 245         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 246         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 247         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 248         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 249         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 250         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 251         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 252             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 253             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 254             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 255             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 256         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 257         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 258         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 259         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 260         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 261         printk("  clustersumoff %u\n",
 262                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 263         printk("  clusteroff    %u\n",
 264                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 265         printk("  nclusterblks  %u\n",
 266                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 267         printk("\n");
 268 }
 269 #else
 270 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 271 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 272 #endif /* CONFIG_UFS_DEBUG */
 273
 274 static const struct super_operations ufs_super_ops;
 275
 276 static char error_buf[1024];
 277
 278 void ufs_error (struct super_block * sb, const char * function,
 279         const char * fmt, ...)
 280 {
 281         struct ufs_sb_private_info * uspi;
 282         struct ufs_super_block_first * usb1;
 283         va_list args;
 284
 285         uspi = UFS_SB(sb)->s_uspi;
 286         usb1 = ubh_get_usb_first(uspi);
 287
 288         if (!(sb->s_flags & MS_RDONLY)) {
 289                 usb1->fs_clean = UFS_FSBAD;
 290                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 291                 sb->s_dirt = 1;
 292                 sb->s_flags |= MS_RDONLY;
 293         }
 294         va_start (args, fmt);
 295         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 296         va_end (args);
 297         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 298         case UFS_MOUNT_ONERROR_PANIC:
 299                 panic ("UFS-fs panic (device %s): %s: %s\n",
 300                         sb->s_id, function, error_buf);
 301
 302         case UFS_MOUNT_ONERROR_LOCK:
 303         case UFS_MOUNT_ONERROR_UMOUNT:
 304         case UFS_MOUNT_ONERROR_REPAIR:
 305                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 306                         sb->s_id, function, error_buf);
 307         }
 308 }
 309
 310 void ufs_panic (struct super_block * sb, const char * function,
 311         const char * fmt, ...)
 312 {
 313         struct ufs_sb_private_info * uspi;
 314         struct ufs_super_block_first * usb1;
 315         va_list args;
 316
 317         lock_kernel();
 318         uspi = UFS_SB(sb)->s_uspi;
 319         usb1 = ubh_get_usb_first(uspi);
 320
 321         if (!(sb->s_flags & MS_RDONLY)) {
 322                 usb1->fs_clean = UFS_FSBAD;
 323                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 324                 sb->s_dirt = 1;
 325         }
 326         va_start (args, fmt);
 327         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 328         va_end (args);
 329         sb->s_flags |= MS_RDONLY;
 330         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 331                 sb->s_id, function, error_buf);
 332 }
 333
 334 void ufs_warning (struct super_block * sb, const char * function,
 335         const char * fmt, ...)
 336 {
 337         va_list args;
 338
 339         va_start (args, fmt);
 340         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 341         va_end (args);
 342         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 343                 sb->s_id, function, error_buf);
 344 }
 345
 346 enum {
 347        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 348        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 349        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 350        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 351        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 352        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 353        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 354        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 355        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 356        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 357        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 358        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 359        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 360        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 361        Opt_err
 362 };
 363
 364 static const match_table_t tokens = {
 365         {Opt_type_old, "ufstype=old"},
 366         {Opt_type_sunx86, "ufstype=sunx86"},
 367         {Opt_type_sun, "ufstype=sun"},
 368         {Opt_type_sunos, "ufstype=sunos"},
 369         {Opt_type_44bsd, "ufstype=44bsd"},
 370         {Opt_type_ufs2, "ufstype=ufs2"},
 371         {Opt_type_ufs2, "ufstype=5xbsd"},
 372         {Opt_type_hp, "ufstype=hp"},
 373         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 374         {Opt_type_nextstep, "ufstype=nextstep"},
 375         {Opt_type_openstep, "ufstype=openstep"},
 376 /*end of possible ufs types */
 377         {Opt_onerror_panic, "onerror=panic"},
 378         {Opt_onerror_lock, "onerror=lock"},
 379         {Opt_onerror_umount, "onerror=umount"},
 380         {Opt_onerror_repair, "onerror=repair"},
 381         {Opt_err, NULL}
 382 };
 383
 384 static int ufs_parse_options (char * options, unsigned * mount_options)
 385 {
 386         char * p;
 387
 388         UFSD("ENTER\n");
 389
 390         if (!options)
 391                 return 1;
 392
 393         while ((p = strsep(&options, ",")) != NULL) {
 394                 substring_t args[MAX_OPT_ARGS];
 395                 int token;
 396                 if (!*p)
 397                         continue;
 398
 399                 token = match_token(p, tokens, args);
 400                 switch (token) {
 401                 case Opt_type_old:
 402                         ufs_clear_opt (*mount_options, UFSTYPE);
 403                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 404                         break;
 405                 case Opt_type_sunx86:
 406                         ufs_clear_opt (*mount_options, UFSTYPE);
 407                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 408                         break;
 409                 case Opt_type_sun:
 410                         ufs_clear_opt (*mount_options, UFSTYPE);
 411                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 412                         break;
 413                 case Opt_type_sunos:
 414                         ufs_clear_opt(*mount_options, UFSTYPE);
 415                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 416                         break;
 417                 case Opt_type_44bsd:
 418                         ufs_clear_opt (*mount_options, UFSTYPE);
 419                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 420                         break;
 421                 case Opt_type_ufs2:
 422                         ufs_clear_opt(*mount_options, UFSTYPE);
 423                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 424                         break;
 425                 case Opt_type_hp:
 426                         ufs_clear_opt (*mount_options, UFSTYPE);
 427                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 428                         break;
 429                 case Opt_type_nextstepcd:
 430                         ufs_clear_opt (*mount_options, UFSTYPE);
 431                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 432                         break;
 433                 case Opt_type_nextstep:
 434                         ufs_clear_opt (*mount_options, UFSTYPE);
 435                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 436                         break;
 437                 case Opt_type_openstep:
 438                         ufs_clear_opt (*mount_options, UFSTYPE);
 439                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 440                         break;
 441                 case Opt_onerror_panic:
 442                         ufs_clear_opt (*mount_options, ONERROR);
 443                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 444                         break;
 445                 case Opt_onerror_lock:
 446                         ufs_clear_opt (*mount_options, ONERROR);
 447                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 448                         break;
 449                 case Opt_onerror_umount:
 450                         ufs_clear_opt (*mount_options, ONERROR);
 451                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 452                         break;
 453                 case Opt_onerror_repair:
 454                         printk("UFS-fs: Unable to do repair on error, "
 455                                 "will lock lock instead\n");
 456                         ufs_clear_opt (*mount_options, ONERROR);
 457                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 458                         break;
 459                 default:
 460                         printk("UFS-fs: Invalid option: \"%s\" "
 461                                         "or missing value\n", p);
 462                         return 0;
 463                 }
 464         }
 465         return 1;
 466 }
 467
 468 /*
 469  * Diffrent types of UFS hold fs_cstotal in different
 470  * places, and use diffrent data structure for it.
 471  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
 472  */
 473 static void ufs_setup_cstotal(struct super_block *sb)
 474 {
 475         struct ufs_sb_info *sbi = UFS_SB(sb);
 476         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 477         struct ufs_super_block_first *usb1;
 478         struct ufs_super_block_second *usb2;
 479         struct ufs_super_block_third *usb3;
 480         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 481
 482         UFSD("ENTER, mtype=%u\n", mtype);
 483         usb1 = ubh_get_usb_first(uspi);
 484         usb2 = ubh_get_usb_second(uspi);
 485         usb3 = ubh_get_usb_third(uspi);
 486
 487         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 488              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 489             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 490                 /*we have statistic in different place, then usual*/
 491                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 492                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 493                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 494                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 495         } else {
 496                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 497                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 498                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 499                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 500         }
 501         UFSD("EXIT\n");
 502 }
 503
 504 /*
 505  * Read on-disk structures associated with cylinder groups
 506  */
 507 static int ufs_read_cylinder_structures(struct super_block *sb)
 508 {
 509         struct ufs_sb_info *sbi = UFS_SB(sb);
 510         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 511         struct ufs_buffer_head * ubh;
 512         unsigned char * base, * space;
 513         unsigned size, blks, i;
 514         struct ufs_super_block_third *usb3;
 515
 516         UFSD("ENTER\n");
 517
 518         usb3 = ubh_get_usb_third(uspi);
 519         /*
 520          * Read cs structures from (usually) first data block
 521          * on the device.
 522          */
 523         size = uspi->s_cssize;
 524         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 525         base = space = kmalloc(size, GFP_KERNEL);
 526         if (!base)
 527                 goto failed;
 528         sbi->s_csp = (struct ufs_csum *)space;
 529         for (i = 0; i < blks; i += uspi->s_fpb) {
 530                 size = uspi->s_bsize;
 531                 if (i + uspi->s_fpb > blks)
 532                         size = (blks - i) * uspi->s_fsize;
 533
 534                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 535
 536                 if (!ubh)
 537                         goto failed;
 538
 539                 ubh_ubhcpymem (space, ubh, size);
 540
 541                 space += size;
 542                 ubh_brelse (ubh);
 543                 ubh = NULL;
 544         }
 545
 546         /*
 547          * Read cylinder group (we read only first fragment from block
 548          * at this time) and prepare internal data structures for cg caching.
 549          */
 550         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 551                 goto failed;
 552         for (i = 0; i < uspi->s_ncg; i++)
 553                 sbi->s_ucg[i] = NULL;
 554         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 555                 sbi->s_ucpi[i] = NULL;
 556                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 557         }
 558         for (i = 0; i < uspi->s_ncg; i++) {
 559                 UFSD("read cg %u\n", i);
 560                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 561                         goto failed;
 562                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 563                         goto failed;
 564
 565                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 566         }
 567         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 568                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 569                         goto failed;
 570                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 571         }
 572         sbi->s_cg_loaded = 0;
 573         UFSD("EXIT\n");
 574         return 1;
 575
 576 failed:
 577         kfree (base);
 578         if (sbi->s_ucg) {
 579                 for (i = 0; i < uspi->s_ncg; i++)
 580                         if (sbi->s_ucg[i])
 581                                 brelse (sbi->s_ucg[i]);
 582                 kfree (sbi->s_ucg);
 583                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 584                         kfree (sbi->s_ucpi[i]);
 585         }
 586         UFSD("EXIT (FAILED)\n");
 587         return 0;
 588 }
 589
 590 /*
 591  * Sync our internal copy of fs_cstotal with disk
 592  */
 593 static void ufs_put_cstotal(struct super_block *sb)
 594 {
 595         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 596         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 597         struct ufs_super_block_first *usb1;
 598         struct ufs_super_block_second *usb2;
 599         struct ufs_super_block_third *usb3;
 600
 601         UFSD("ENTER\n");
 602         usb1 = ubh_get_usb_first(uspi);
 603         usb2 = ubh_get_usb_second(uspi);
 604         usb3 = ubh_get_usb_third(uspi);
 605
 606         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 607              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 608             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 609                 /*we have statistic in different place, then usual*/
 610                 usb2->fs_un.fs_u2.cs_ndir =
 611                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 612                 usb2->fs_un.fs_u2.cs_nbfree =
 613                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 614                 usb3->fs_un1.fs_u2.cs_nifree =
 615                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 616                 usb3->fs_un1.fs_u2.cs_nffree =
 617                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 618         } else {
 619                 usb1->fs_cstotal.cs_ndir =
 620                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 621                 usb1->fs_cstotal.cs_nbfree =
 622                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 623                 usb1->fs_cstotal.cs_nifree =
 624                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 625                 usb1->fs_cstotal.cs_nffree =
 626                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 627         }
 628         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 629         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 630         UFSD("EXIT\n");
 631 }
 632
 633 /**
 634  * ufs_put_super_internal() - put on-disk intrenal structures
 635  * @sb: pointer to super_block structure
 636  * Put on-disk structures associated with cylinder groups
 637  * and write them back to disk, also update cs_total on disk
 638  */
 639 static void ufs_put_super_internal(struct super_block *sb)
 640 {
 641         struct ufs_sb_info *sbi = UFS_SB(sb);
 642         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 643         struct ufs_buffer_head * ubh;
 644         unsigned char * base, * space;
 645         unsigned blks, size, i;
 646
 647
 648         UFSD("ENTER\n");
 649
 650         lock_kernel();
 651
 652         ufs_put_cstotal(sb);
 653         size = uspi->s_cssize;
 654         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 655         base = space = (char*) sbi->s_csp;
 656         for (i = 0; i < blks; i += uspi->s_fpb) {
 657                 size = uspi->s_bsize;
 658                 if (i + uspi->s_fpb > blks)
 659                         size = (blks - i) * uspi->s_fsize;
 660
 661                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 662
 663                 ubh_memcpyubh (ubh, space, size);
 664                 space += size;
 665                 ubh_mark_buffer_uptodate (ubh, 1);
 666                 ubh_mark_buffer_dirty (ubh);
 667                 ubh_brelse (ubh);
 668         }
 669         for (i = 0; i < sbi->s_cg_loaded; i++) {
 670                 ufs_put_cylinder (sb, i);
 671                 kfree (sbi->s_ucpi[i]);
 672         }
 673         for (; i < UFS_MAX_GROUP_LOADED; i++)
 674                 kfree (sbi->s_ucpi[i]);
 675         for (i = 0; i < uspi->s_ncg; i++)
 676                 brelse (sbi->s_ucg[i]);
 677         kfree (sbi->s_ucg);
 678         kfree (base);
 679
 680         unlock_kernel();
 681
 682         UFSD("EXIT\n");
 683 }
 684
 685 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 686 {
 687         struct ufs_sb_info * sbi;
 688         struct ufs_sb_private_info * uspi;
 689         struct ufs_super_block_first * usb1;
 690         struct ufs_super_block_second * usb2;
 691         struct ufs_super_block_third * usb3;
 692         struct ufs_buffer_head * ubh;
 693         struct inode *inode;
 694         unsigned block_size, super_block_size;
 695         unsigned flags;
 696         unsigned super_block_offset;
 697         unsigned maxsymlen;
 698         int ret = -EINVAL;
 699
 700         uspi = NULL;
 701         ubh = NULL;
 702         flags = 0;
 703
 704         UFSD("ENTER\n");
 705
 706         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 707         if (!sbi)
 708                 goto failed_nomem;
 709         sb->s_fs_info = sbi;
 710
 711         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 712
 713 #ifndef CONFIG_UFS_FS_WRITE
 714         if (!(sb->s_flags & MS_RDONLY)) {
 715                 printk("ufs was compiled with read-only support, "
 716                 "can't be mounted as read-write\n");
 717                 goto failed;
 718         }
 719 #endif
 720         /*
 721          * Set default mount options
 722          * Parse mount options
 723          */
 724         sbi->s_mount_opt = 0;
 725         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 726         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 727                 printk("wrong mount options\n");
 728                 goto failed;
 729         }
 730         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 731                 if (!silent)
 732                         printk("You didn't specify the type of your ufs filesystem\n\n"
 733                         "mount -t ufs -o ufstype="
 734                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 735                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 736                         "default is ufstype=old\n");
 737                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 738         }
 739
 740         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 741         sbi->s_uspi = uspi;
 742         if (!uspi)
 743                 goto failed;
 744         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 745         super_block_offset=UFS_SBLOCK;
 746
 747         /* Keep 2Gig file limit. Some UFS variants need to override
 748            this but as I don't know which I'll let those in the know loosen
 749            the rules */
 750         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 751         case UFS_MOUNT_UFSTYPE_44BSD:
 752                 UFSD("ufstype=44bsd\n");
 753                 uspi->s_fsize = block_size = 512;
 754                 uspi->s_fmask = ~(512 - 1);
 755                 uspi->s_fshift = 9;
 756                 uspi->s_sbsize = super_block_size = 1536;
 757                 uspi->s_sbbase = 0;
 758                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 759                 break;
 760         case UFS_MOUNT_UFSTYPE_UFS2:
 761                 UFSD("ufstype=ufs2\n");
 762                 super_block_offset=SBLOCK_UFS2;
 763                 uspi->s_fsize = block_size = 512;
 764                 uspi->s_fmask = ~(512 - 1);
 765                 uspi->s_fshift = 9;
 766                 uspi->s_sbsize = super_block_size = 1536;
 767                 uspi->s_sbbase =  0;
 768                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 769                 break;
 770
 771         case UFS_MOUNT_UFSTYPE_SUN:
 772                 UFSD("ufstype=sun\n");
 773                 uspi->s_fsize = block_size = 1024;
 774                 uspi->s_fmask = ~(1024 - 1);
 775                 uspi->s_fshift = 10;
 776                 uspi->s_sbsize = super_block_size = 2048;
 777                 uspi->s_sbbase = 0;
 778                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 779                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 780                 break;
 781
 782         case UFS_MOUNT_UFSTYPE_SUNOS:
 783                 UFSD(("ufstype=sunos\n"))
 784                 uspi->s_fsize = block_size = 1024;
 785                 uspi->s_fmask = ~(1024 - 1);
 786                 uspi->s_fshift = 10;
 787                 uspi->s_sbsize = 2048;
 788                 super_block_size = 2048;
 789                 uspi->s_sbbase = 0;
 790                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 791                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 792                 break;
 793
 794         case UFS_MOUNT_UFSTYPE_SUNx86:
 795                 UFSD("ufstype=sunx86\n");
 796                 uspi->s_fsize = block_size = 1024;
 797                 uspi->s_fmask = ~(1024 - 1);
 798                 uspi->s_fshift = 10;
 799                 uspi->s_sbsize = super_block_size = 2048;
 800                 uspi->s_sbbase = 0;
 801                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 802                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 803                 break;
 804
 805         case UFS_MOUNT_UFSTYPE_OLD:
 806                 UFSD("ufstype=old\n");
 807                 uspi->s_fsize = block_size = 1024;
 808                 uspi->s_fmask = ~(1024 - 1);
 809                 uspi->s_fshift = 10;
 810                 uspi->s_sbsize = super_block_size = 2048;
 811                 uspi->s_sbbase = 0;
 812                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 813                 if (!(sb->s_flags & MS_RDONLY)) {
 814                         if (!silent)
 815                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 816                         sb->s_flags |= MS_RDONLY;
 817                 }
 818                 break;
 819
 820         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 821                 UFSD("ufstype=nextstep\n");
 822                 uspi->s_fsize = block_size = 1024;
 823                 uspi->s_fmask = ~(1024 - 1);
 824                 uspi->s_fshift = 10;
 825                 uspi->s_sbsize = super_block_size = 2048;
 826                 uspi->s_sbbase = 0;
 827                 uspi->s_dirblksize = 1024;
 828                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 829                 if (!(sb->s_flags & MS_RDONLY)) {
 830                         if (!silent)
 831                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 832                         sb->s_flags |= MS_RDONLY;
 833                 }
 834                 break;
 835
 836         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 837                 UFSD("ufstype=nextstep-cd\n");
 838                 uspi->s_fsize = block_size = 2048;
 839                 uspi->s_fmask = ~(2048 - 1);
 840                 uspi->s_fshift = 11;
 841                 uspi->s_sbsize = super_block_size = 2048;
 842                 uspi->s_sbbase = 0;
 843                 uspi->s_dirblksize = 1024;
 844                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 845                 if (!(sb->s_flags & MS_RDONLY)) {
 846                         if (!silent)
 847                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 848                         sb->s_flags |= MS_RDONLY;
 849                 }
 850                 break;
 851
 852         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 853                 UFSD("ufstype=openstep\n");
 854                 uspi->s_fsize = block_size = 1024;
 855                 uspi->s_fmask = ~(1024 - 1);
 856                 uspi->s_fshift = 10;
 857                 uspi->s_sbsize = super_block_size = 2048;
 858                 uspi->s_sbbase = 0;
 859                 uspi->s_dirblksize = 1024;
 860                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 861                 if (!(sb->s_flags & MS_RDONLY)) {
 862                         if (!silent)
 863                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 864                         sb->s_flags |= MS_RDONLY;
 865                 }
 866                 break;
 867
 868         case UFS_MOUNT_UFSTYPE_HP:
 869                 UFSD("ufstype=hp\n");
 870                 uspi->s_fsize = block_size = 1024;
 871                 uspi->s_fmask = ~(1024 - 1);
 872                 uspi->s_fshift = 10;
 873                 uspi->s_sbsize = super_block_size = 2048;
 874                 uspi->s_sbbase = 0;
 875                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 876                 if (!(sb->s_flags & MS_RDONLY)) {
 877                         if (!silent)
 878                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 879                         sb->s_flags |= MS_RDONLY;
 880                 }
 881                 break;
 882         default:
 883                 if (!silent)
 884                         printk("unknown ufstype\n");
 885                 goto failed;
 886         }
 887
 888 again:
 889         if (!sb_set_blocksize(sb, block_size)) {
 890                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 891                 goto failed;
 892         }
 893
 894         /*
 895          * read ufs super block from device
 896          */
 897
 898         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 899
 900         if (!ubh)
 901             goto failed;
 902
 903         usb1 = ubh_get_usb_first(uspi);
 904         usb2 = ubh_get_usb_second(uspi);
 905         usb3 = ubh_get_usb_third(uspi);
 906
 907         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 908         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 909         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 910             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 911                 flags &= ~UFS_ST_MASK;
 912                 flags |=  UFS_ST_SUN;
 913         }
 914
 915         /*
 916          * Check ufs magic number
 917          */
 918         sbi->s_bytesex = BYTESEX_LE;
 919         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 920                 case UFS_MAGIC:
 921                 case UFS_MAGIC_BW:
 922                 case UFS2_MAGIC:
 923                 case UFS_MAGIC_LFN:
 924                 case UFS_MAGIC_FEA:
 925                 case UFS_MAGIC_4GB:
 926                         goto magic_found;
 927         }
 928         sbi->s_bytesex = BYTESEX_BE;
 929         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 930                 case UFS_MAGIC:
 931                 case UFS_MAGIC_BW:
 932                 case UFS2_MAGIC:
 933                 case UFS_MAGIC_LFN:
 934                 case UFS_MAGIC_FEA:
 935                 case UFS_MAGIC_4GB:
 936                         goto magic_found;
 937         }
 938
 939         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 940           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 941           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 942           && uspi->s_sbbase < 256) {
 943                 ubh_brelse_uspi(uspi);
 944                 ubh = NULL;
 945                 uspi->s_sbbase += 8;
 946                 goto again;
 947         }
 948         if (!silent)
 949                 printk("ufs_read_super: bad magic number\n");
 950         goto failed;
 951
 952 magic_found:
 953         /*
 954          * Check block and fragment sizes
 955          */
 956         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 957         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 958         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 959         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 960         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 961
 962         if (!is_power_of_2(uspi->s_fsize)) {
 963                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 964                         uspi->s_fsize);
 965                         goto failed;
 966         }
 967         if (uspi->s_fsize < 512) {
 968                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 969                         uspi->s_fsize);
 970                 goto failed;
 971         }
 972         if (uspi->s_fsize > 4096) {
 973                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 974                         uspi->s_fsize);
 975                 goto failed;
 976         }
 977         if (!is_power_of_2(uspi->s_bsize)) {
 978                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 979                         uspi->s_bsize);
 980                 goto failed;
 981         }
 982         if (uspi->s_bsize < 4096) {
 983                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 984                         uspi->s_bsize);
 985                 goto failed;
 986         }
 987         if (uspi->s_bsize / uspi->s_fsize > 8) {
 988                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 989                         uspi->s_bsize / uspi->s_fsize);
 990                 goto failed;
 991         }
 992         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 993                 ubh_brelse_uspi(uspi);
 994                 ubh = NULL;
 995                 block_size = uspi->s_fsize;
 996                 super_block_size = uspi->s_sbsize;
 997                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 998                 goto again;
 999         }
1000
1001         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1002         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1003
1004         /*
1005          * Check, if file system was correctly unmounted.
1006          * If not, make it read only.
1007          */
1008         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1009           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1010           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1011             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1012           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1013           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1014                 switch(usb1->fs_clean) {
1015                 case UFS_FSCLEAN:
1016                         UFSD("fs is clean\n");
1017                         break;
1018                 case UFS_FSSTABLE:
1019                         UFSD("fs is stable\n");
1020                         break;
1021                 case UFS_FSLOG:
1022                         UFSD("fs is logging fs\n");
1023                         break;
1024                 case UFS_FSOSF1:
1025                         UFSD("fs is DEC OSF/1\n");
1026                         break;
1027                 case UFS_FSACTIVE:
1028                         printk("ufs_read_super: fs is active\n");
1029                         sb->s_flags |= MS_RDONLY;
1030                         break;
1031                 case UFS_FSBAD:
1032                         printk("ufs_read_super: fs is bad\n");
1033                         sb->s_flags |= MS_RDONLY;
1034                         break;
1035                 default:
1036                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1037                         sb->s_flags |= MS_RDONLY;
1038                         break;
1039                 }
1040         } else {
1041                 printk("ufs_read_super: fs needs fsck\n");
1042                 sb->s_flags |= MS_RDONLY;
1043         }
1044
1045         /*
1046          * Read ufs_super_block into internal data structures
1047          */
1048         sb->s_op = &ufs_super_ops;
1049         sb->s_export_op = &ufs_export_ops;
1050         sb->dq_op = NULL; /***/
1051         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1052
1053         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1054         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1055         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1056         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1057         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1058         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1059
1060         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1061                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1062                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1063         } else {
1064                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1065                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1066         }
1067
1068         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1069         /* s_bsize already set */
1070         /* s_fsize already set */
1071         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1072         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1073         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1074         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1075         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1076         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1077         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1078                 uspi->s_fshift);
1079         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1080         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1081         /* s_sbsize already set */
1082         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1083         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1084         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1085         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1086         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1087         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1088         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1089         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1090
1091         if (uspi->fs_magic == UFS2_MAGIC)
1092                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1093         else
1094                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1095
1096         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1097         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1098         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1099         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1100         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1101         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1102         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1103         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1104         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1105         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1106         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1107         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1108         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1109         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1110
1111         /*
1112          * Compute another frequently used values
1113          */
1114         uspi->s_fpbmask = uspi->s_fpb - 1;
1115         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1116                 uspi->s_apbshift = uspi->s_bshift - 3;
1117         else
1118                 uspi->s_apbshift = uspi->s_bshift - 2;
1119
1120         uspi->s_2apbshift = uspi->s_apbshift * 2;
1121         uspi->s_3apbshift = uspi->s_apbshift * 3;
1122         uspi->s_apb = 1 << uspi->s_apbshift;
1123         uspi->s_2apb = 1 << uspi->s_2apbshift;
1124         uspi->s_3apb = 1 << uspi->s_3apbshift;
1125         uspi->s_apbmask = uspi->s_apb - 1;
1126         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1127         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1128         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1129         uspi->s_bpf = uspi->s_fsize << 3;
1130         uspi->s_bpfshift = uspi->s_fshift + 3;
1131         uspi->s_bpfmask = uspi->s_bpf - 1;
1132         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1133             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1134                 uspi->s_maxsymlinklen =
1135                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1136
1137         if (uspi->fs_magic == UFS2_MAGIC)
1138                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1139         else
1140                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1141         if (uspi->s_maxsymlinklen > maxsymlen) {
1142                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1143                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1144                 uspi->s_maxsymlinklen = maxsymlen;
1145         }
1146
1147         inode = ufs_iget(sb, UFS_ROOTINO);
1148         if (IS_ERR(inode)) {
1149                 ret = PTR_ERR(inode);
1150                 goto failed;
1151         }
1152         sb->s_root = d_alloc_root(inode);
1153         if (!sb->s_root) {
1154                 ret = -ENOMEM;
1155                 goto dalloc_failed;
1156         }
1157
1158         ufs_setup_cstotal(sb);
1159         /*
1160          * Read cylinder group structures
1161          */
1162         if (!(sb->s_flags & MS_RDONLY))
1163                 if (!ufs_read_cylinder_structures(sb))
1164                         goto failed;
1165
1166         UFSD("EXIT\n");
1167         return 0;
1168
1169 dalloc_failed:
1170         iput(inode);
1171 failed:
1172         if (ubh)
1173                 ubh_brelse_uspi (uspi);
1174         kfree (uspi);
1175         kfree(sbi);
1176         sb->s_fs_info = NULL;
1177         UFSD("EXIT (FAILED)\n");
1178         return ret;
1179
1180 failed_nomem:
1181         UFSD("EXIT (NOMEM)\n");
1182         return -ENOMEM;
1183 }
1184
1185 static int ufs_sync_fs(struct super_block *sb, int wait)
1186 {
1187         struct ufs_sb_private_info * uspi;
1188         struct ufs_super_block_first * usb1;
1189         struct ufs_super_block_third * usb3;
1190         unsigned flags;
1191
1192         lock_super(sb);
1193         lock_kernel();
1194
1195         UFSD("ENTER\n");
1196
1197         flags = UFS_SB(sb)->s_flags;
1198         uspi = UFS_SB(sb)->s_uspi;
1199         usb1 = ubh_get_usb_first(uspi);
1200         usb3 = ubh_get_usb_third(uspi);
1201
1202         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1203         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
1204             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1205             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1206                 ufs_set_fs_state(sb, usb1, usb3,
1207                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1208         ufs_put_cstotal(sb);
1209         sb->s_dirt = 0;
1210
1211         UFSD("EXIT\n");
1212         unlock_kernel();
1213         unlock_super(sb);
1214
1215         return 0;
1216 }
1217
1218 static void ufs_write_super(struct super_block *sb)
1219 {
1220         if (!(sb->s_flags & MS_RDONLY))
1221                 ufs_sync_fs(sb, 1);
1222         else
1223                 sb->s_dirt = 0;
1224 }
1225
1226 static void ufs_put_super(struct super_block *sb)
1227 {
1228         struct ufs_sb_info * sbi = UFS_SB(sb);
1229
1230         UFSD("ENTER\n");
1231
1232         if (sb->s_dirt)
1233                 ufs_write_super(sb);
1234
1235         if (!(sb->s_flags & MS_RDONLY))
1236                 ufs_put_super_internal(sb);
1237
1238         ubh_brelse_uspi (sbi->s_uspi);
1239         kfree (sbi->s_uspi);
1240         kfree (sbi);
1241         sb->s_fs_info = NULL;
1242         UFSD("EXIT\n");
1243         return;
1244 }
1245
1246
1247 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1248 {
1249         struct ufs_sb_private_info * uspi;
1250         struct ufs_super_block_first * usb1;
1251         struct ufs_super_block_third * usb3;
1252         unsigned new_mount_opt, ufstype;
1253         unsigned flags;
1254
1255         lock_kernel();
1256         lock_super(sb);
1257         uspi = UFS_SB(sb)->s_uspi;
1258         flags = UFS_SB(sb)->s_flags;
1259         usb1 = ubh_get_usb_first(uspi);
1260         usb3 = ubh_get_usb_third(uspi);
1261
1262         /*
1263          * Allow the "check" option to be passed as a remount option.
1264          * It is not possible to change ufstype option during remount
1265          */
1266         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1267         new_mount_opt = 0;
1268         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1269         if (!ufs_parse_options (data, &new_mount_opt)) {
1270                 unlock_super(sb);
1271                 unlock_kernel();
1272                 return -EINVAL;
1273         }
1274         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1275                 new_mount_opt |= ufstype;
1276         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1277                 printk("ufstype can't be changed during remount\n");
1278                 unlock_super(sb);
1279                 unlock_kernel();
1280                 return -EINVAL;
1281         }
1282
1283         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1284                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1285                 unlock_super(sb);
1286                 unlock_kernel();
1287                 return 0;
1288         }
1289
1290         /*
1291          * fs was mouted as rw, remounting ro
1292          */
1293         if (*mount_flags & MS_RDONLY) {
1294                 ufs_put_super_internal(sb);
1295                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1296                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1297                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1298                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1299                         ufs_set_fs_state(sb, usb1, usb3,
1300                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1301                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1302                 sb->s_dirt = 0;
1303                 sb->s_flags |= MS_RDONLY;
1304         } else {
1305         /*
1306          * fs was mounted as ro, remounting rw
1307          */
1308 #ifndef CONFIG_UFS_FS_WRITE
1309                 printk("ufs was compiled with read-only support, "
1310                 "can't be mounted as read-write\n");
1311                 unlock_super(sb);
1312                 unlock_kernel();
1313                 return -EINVAL;
1314 #else
1315                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1316                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1317                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1318                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1319                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1320                         printk("this ufstype is read-only supported\n");
1321                         unlock_super(sb);
1322                         unlock_kernel();
1323                         return -EINVAL;
1324                 }
1325                 if (!ufs_read_cylinder_structures(sb)) {
1326                         printk("failed during remounting\n");
1327                         unlock_super(sb);
1328                         unlock_kernel();
1329                         return -EPERM;
1330                 }
1331                 sb->s_flags &= ~MS_RDONLY;
1332 #endif
1333         }
1334         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1335         unlock_super(sb);
1336         unlock_kernel();
1337         return 0;
1338 }
1339
1340 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1341 {
1342         struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1343         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1344         const struct match_token *tp = tokens;
1345
1346         while (tp->token != Opt_onerror_panic && tp->token != mval)
1347                 ++tp;
1348         BUG_ON(tp->token == Opt_onerror_panic);
1349         seq_printf(seq, ",%s", tp->pattern);
1350
1351         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1352         while (tp->token != Opt_err && tp->token != mval)
1353                 ++tp;
1354         BUG_ON(tp->token == Opt_err);
1355         seq_printf(seq, ",%s", tp->pattern);
1356
1357         return 0;
1358 }
1359
1360 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1361 {
1362         struct super_block *sb = dentry->d_sb;
1363         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1364         unsigned  flags = UFS_SB(sb)->s_flags;
1365         struct ufs_super_block_first *usb1;
1366         struct ufs_super_block_second *usb2;
1367         struct ufs_super_block_third *usb3;
1368         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1369
1370         lock_kernel();
1371
1372         usb1 = ubh_get_usb_first(uspi);
1373         usb2 = ubh_get_usb_second(uspi);
1374         usb3 = ubh_get_usb_third(uspi);
1375
1376         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1377                 buf->f_type = UFS2_MAGIC;
1378                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1379         } else {
1380                 buf->f_type = UFS_MAGIC;
1381                 buf->f_blocks = uspi->s_dsize;
1382         }
1383         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1384                 uspi->cs_total.cs_nffree;
1385         buf->f_ffree = uspi->cs_total.cs_nifree;
1386         buf->f_bsize = sb->s_blocksize;
1387         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1388                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1389         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1390         buf->f_namelen = UFS_MAXNAMLEN;
1391         buf->f_fsid.val[0] = (u32)id;
1392         buf->f_fsid.val[1] = (u32)(id >> 32);
1393
1394         unlock_kernel();
1395
1396         return 0;
1397 }
1398
1399 static struct kmem_cache * ufs_inode_cachep;
1400
1401 static struct inode *ufs_alloc_inode(struct super_block *sb)
1402 {
1403         struct ufs_inode_info *ei;
1404         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1405         if (!ei)
1406                 return NULL;
1407         ei->vfs_inode.i_version = 1;
1408         return &ei->vfs_inode;
1409 }
1410
1411 static void ufs_destroy_inode(struct inode *inode)
1412 {
1413         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1414 }
1415
1416 static void init_once(void *foo)
1417 {
1418         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1419
1420         inode_init_once(&ei->vfs_inode);
1421 }
1422
1423 static int init_inodecache(void)
1424 {
1425         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1426                                              sizeof(struct ufs_inode_info),
1427                                              0, (SLAB_RECLAIM_ACCOUNT|
1428                                                 SLAB_MEM_SPREAD),
1429                                              init_once);
1430         if (ufs_inode_cachep == NULL)
1431                 return -ENOMEM;
1432         return 0;
1433 }
1434
1435 static void destroy_inodecache(void)
1436 {
1437         kmem_cache_destroy(ufs_inode_cachep);
1438 }
1439
1440 static void ufs_clear_inode(struct inode *inode)
1441 {
1442         dquot_drop(inode);
1443 }
1444
1445 #ifdef CONFIG_QUOTA
1446 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1447 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1448 #endif
1449
1450 static const struct super_operations ufs_super_ops = {
1451         .alloc_inode    = ufs_alloc_inode,
1452         .destroy_inode  = ufs_destroy_inode,
1453         .write_inode    = ufs_write_inode,
1454         .delete_inode   = ufs_delete_inode,
1455         .clear_inode    = ufs_clear_inode,
1456         .put_super      = ufs_put_super,
1457         .write_super    = ufs_write_super,
1458         .sync_fs        = ufs_sync_fs,
1459         .statfs         = ufs_statfs,
1460         .remount_fs     = ufs_remount,
1461         .show_options   = ufs_show_options,
1462 #ifdef CONFIG_QUOTA
1463         .quota_read     = ufs_quota_read,
1464         .quota_write    = ufs_quota_write,
1465 #endif
1466 };
1467
1468 #ifdef CONFIG_QUOTA
1469
1470 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1471  * acquiring the locks... As quota files are never truncated and quota code
1472  * itself serializes the operations (and noone else should touch the files)
1473  * we don't have to be afraid of races */
1474 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1475                                size_t len, loff_t off)
1476 {
1477         struct inode *inode = sb_dqopt(sb)->files[type];
1478         sector_t blk = off >> sb->s_blocksize_bits;
1479         int err = 0;
1480         int offset = off & (sb->s_blocksize - 1);
1481         int tocopy;
1482         size_t toread;
1483         struct buffer_head *bh;
1484         loff_t i_size = i_size_read(inode);
1485
1486         if (off > i_size)
1487                 return 0;
1488         if (off+len > i_size)
1489                 len = i_size-off;
1490         toread = len;
1491         while (toread > 0) {
1492                 tocopy = sb->s_blocksize - offset < toread ?
1493                                 sb->s_blocksize - offset : toread;
1494
1495                 bh = ufs_bread(inode, blk, 0, &err);
1496                 if (err)
1497                         return err;
1498                 if (!bh)        /* A hole? */
1499                         memset(data, 0, tocopy);
1500                 else {
1501                         memcpy(data, bh->b_data+offset, tocopy);
1502                         brelse(bh);
1503                 }
1504                 offset = 0;
1505                 toread -= tocopy;
1506                 data += tocopy;
1507                 blk++;
1508         }
1509         return len;
1510 }
1511
1512 /* Write to quotafile */
1513 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1514                                 const char *data, size_t len, loff_t off)
1515 {
1516         struct inode *inode = sb_dqopt(sb)->files[type];
1517         sector_t blk = off >> sb->s_blocksize_bits;
1518         int err = 0;
1519         int offset = off & (sb->s_blocksize - 1);
1520         int tocopy;
1521         size_t towrite = len;
1522         struct buffer_head *bh;
1523
1524         mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1525         while (towrite > 0) {
1526                 tocopy = sb->s_blocksize - offset < towrite ?
1527                                 sb->s_blocksize - offset : towrite;
1528
1529                 bh = ufs_bread(inode, blk, 1, &err);
1530                 if (!bh)
1531                         goto out;
1532                 lock_buffer(bh);
1533                 memcpy(bh->b_data+offset, data, tocopy);
1534                 flush_dcache_page(bh->b_page);
1535                 set_buffer_uptodate(bh);
1536                 mark_buffer_dirty(bh);
1537                 unlock_buffer(bh);
1538                 brelse(bh);
1539                 offset = 0;
1540                 towrite -= tocopy;
1541                 data += tocopy;
1542                 blk++;
1543         }
1544 out:
1545         if (len == towrite) {
1546                 mutex_unlock(&inode->i_mutex);
1547                 return err;
1548         }
1549         if (inode->i_size < off+len-towrite)
1550                 i_size_write(inode, off+len-towrite);
1551         inode->i_version++;
1552         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1553         mark_inode_dirty(inode);
1554         mutex_unlock(&inode->i_mutex);
1555         return len - towrite;
1556 }
1557
1558 #endif
1559
1560 static int ufs_get_sb(struct file_system_type *fs_type,
1561         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1562 {
1563         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1564 }
1565
1566 static struct file_system_type ufs_fs_type = {
1567         .owner          = THIS_MODULE,
1568         .name           = "ufs",
1569         .get_sb         = ufs_get_sb,
1570         .kill_sb        = kill_block_super,
1571         .fs_flags       = FS_REQUIRES_DEV,
1572 };
1573
1574 static int __init init_ufs_fs(void)
1575 {
1576         int err = init_inodecache();
1577         if (err)
1578                 goto out1;
1579         err = register_filesystem(&ufs_fs_type);
1580         if (err)
1581                 goto out;
1582         return 0;
1583 out:
1584         destroy_inodecache();
1585 out1:
1586         return err;
1587 }
1588
1589 static void __exit exit_ufs_fs(void)
1590 {
1591         unregister_filesystem(&ufs_fs_type);
1592         destroy_inodecache();
1593 }
1594
1595 module_init(init_ufs_fs)
1596 module_exit(exit_ufs_fs)
1597 MODULE_LICENSE("GPL");