git.oblomov.eu Git - linux-2.6/blob - 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/module.h>
  70 #include <linux/bitops.h>
  71
  72 #include <stdarg.h>
  73
  74 #include <asm/uaccess.h>
  75 #include <asm/system.h>
  76
  77 #include <linux/errno.h>
  78 #include <linux/fs.h>
  79 #include <linux/quotaops.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 #ifdef CONFIG_UFS_DEBUG
 100 /*
 101  * Print contents of ufs_super_block, useful for debugging
 102  */
 103 static void ufs_print_super_stuff(struct super_block *sb,
 104                                   struct ufs_super_block_first *usb1,
 105                                   struct ufs_super_block_second *usb2,
 106                                   struct ufs_super_block_third *usb3)
 107 {
 108         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 109
 110         printk("ufs_print_super_stuff\n");
 111         printk("  magic:     0x%x\n", magic);
 112         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 113                 printk("  fs_size:   %llu\n", (unsigned long long)
 114                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 115                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 116                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 117                 printk("  bsize:         %u\n",
 118                        fs32_to_cpu(sb, usb1->fs_bsize));
 119                 printk("  fsize:         %u\n",
 120                        fs32_to_cpu(sb, usb1->fs_fsize));
 121                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 122                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 123                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 124                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 125                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 126                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 127                        (unsigned long long)
 128                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 129                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 130                        (unsigned long long)
 131                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 132                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 133                        (unsigned long long)
 134                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 135                 printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
 136                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 137         } else {
 138                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 139                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 140                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 141                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 142                 printk(" cgoffset:    %u\n",
 143                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 144                 printk(" ~cgmask:     0x%x\n",
 145                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 146                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 147                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 148                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 149                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 150                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 151                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 152                 printk(" fragshift:   %u\n",
 153                        fs32_to_cpu(sb, usb1->fs_fragshift));
 154                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 155                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 156                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 157                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 158                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 159                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 160                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 161                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 162                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 163                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 164                 printk(" fstodb:      %u\n",
 165                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 166                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 167                 printk(" ndir         %u\n",
 168                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 169                 printk(" nifree       %u\n",
 170                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 171                 printk(" nbfree       %u\n",
 172                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 173                 printk(" nffree       %u\n",
 174                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 175         }
 176         printk("\n");
 177 }
 178
 179 /*
 180  * Print contents of ufs_cylinder_group, useful for debugging
 181  */
 182 static void ufs_print_cylinder_stuff(struct super_block *sb,
 183                                      struct ufs_cylinder_group *cg)
 184 {
 185         printk("\nufs_print_cylinder_stuff\n");
 186         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 187         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 188         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 189         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 190         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 191         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 192         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 193         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 194         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 195         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 196         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 197         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 198         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 199         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 200         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 201             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 202             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 203             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 204             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 205         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 206         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 207         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 208         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 209         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 210         printk("  clustersumoff %u\n",
 211                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 212         printk("  clusteroff    %u\n",
 213                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 214         printk("  nclusterblks  %u\n",
 215                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 216         printk("\n");
 217 }
 218 #else
 219 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 220 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 221 #endif /* CONFIG_UFS_DEBUG */
 222
 223 static const struct super_operations ufs_super_ops;
 224
 225 static char error_buf[1024];
 226
 227 void ufs_error (struct super_block * sb, const char * function,
 228         const char * fmt, ...)
 229 {
 230         struct ufs_sb_private_info * uspi;
 231         struct ufs_super_block_first * usb1;
 232         va_list args;
 233
 234         uspi = UFS_SB(sb)->s_uspi;
 235         usb1 = ubh_get_usb_first(uspi);
 236
 237         if (!(sb->s_flags & MS_RDONLY)) {
 238                 usb1->fs_clean = UFS_FSBAD;
 239                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 240                 sb->s_dirt = 1;
 241                 sb->s_flags |= MS_RDONLY;
 242         }
 243         va_start (args, fmt);
 244         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 245         va_end (args);
 246         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 247         case UFS_MOUNT_ONERROR_PANIC:
 248                 panic ("UFS-fs panic (device %s): %s: %s\n",
 249                         sb->s_id, function, error_buf);
 250
 251         case UFS_MOUNT_ONERROR_LOCK:
 252         case UFS_MOUNT_ONERROR_UMOUNT:
 253         case UFS_MOUNT_ONERROR_REPAIR:
 254                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 255                         sb->s_id, function, error_buf);
 256         }
 257 }
 258
 259 void ufs_panic (struct super_block * sb, const char * function,
 260         const char * fmt, ...)
 261 {
 262         struct ufs_sb_private_info * uspi;
 263         struct ufs_super_block_first * usb1;
 264         va_list args;
 265
 266         lock_kernel();
 267         uspi = UFS_SB(sb)->s_uspi;
 268         usb1 = ubh_get_usb_first(uspi);
 269
 270         if (!(sb->s_flags & MS_RDONLY)) {
 271                 usb1->fs_clean = UFS_FSBAD;
 272                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 273                 sb->s_dirt = 1;
 274         }
 275         va_start (args, fmt);
 276         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 277         va_end (args);
 278         sb->s_flags |= MS_RDONLY;
 279         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 280                 sb->s_id, function, error_buf);
 281 }
 282
 283 void ufs_warning (struct super_block * sb, const char * function,
 284         const char * fmt, ...)
 285 {
 286         va_list args;
 287
 288         va_start (args, fmt);
 289         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 290         va_end (args);
 291         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 292                 sb->s_id, function, error_buf);
 293 }
 294
 295 enum {
 296        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 297        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 298        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 299        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 300        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 301        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 302        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 303        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 304        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 305        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 306        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 307        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 308        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 309        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 310        Opt_err
 311 };
 312
 313 static const match_table_t tokens = {
 314         {Opt_type_old, "ufstype=old"},
 315         {Opt_type_sunx86, "ufstype=sunx86"},
 316         {Opt_type_sun, "ufstype=sun"},
 317         {Opt_type_sunos, "ufstype=sunos"},
 318         {Opt_type_44bsd, "ufstype=44bsd"},
 319         {Opt_type_ufs2, "ufstype=ufs2"},
 320         {Opt_type_ufs2, "ufstype=5xbsd"},
 321         {Opt_type_hp, "ufstype=hp"},
 322         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 323         {Opt_type_nextstep, "ufstype=nextstep"},
 324         {Opt_type_openstep, "ufstype=openstep"},
 325 /*end of possible ufs types */
 326         {Opt_onerror_panic, "onerror=panic"},
 327         {Opt_onerror_lock, "onerror=lock"},
 328         {Opt_onerror_umount, "onerror=umount"},
 329         {Opt_onerror_repair, "onerror=repair"},
 330         {Opt_err, NULL}
 331 };
 332
 333 static int ufs_parse_options (char * options, unsigned * mount_options)
 334 {
 335         char * p;
 336
 337         UFSD("ENTER\n");
 338
 339         if (!options)
 340                 return 1;
 341
 342         while ((p = strsep(&options, ",")) != NULL) {
 343                 substring_t args[MAX_OPT_ARGS];
 344                 int token;
 345                 if (!*p)
 346                         continue;
 347
 348                 token = match_token(p, tokens, args);
 349                 switch (token) {
 350                 case Opt_type_old:
 351                         ufs_clear_opt (*mount_options, UFSTYPE);
 352                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 353                         break;
 354                 case Opt_type_sunx86:
 355                         ufs_clear_opt (*mount_options, UFSTYPE);
 356                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 357                         break;
 358                 case Opt_type_sun:
 359                         ufs_clear_opt (*mount_options, UFSTYPE);
 360                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 361                         break;
 362                 case Opt_type_sunos:
 363                         ufs_clear_opt(*mount_options, UFSTYPE);
 364                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 365                         break;
 366                 case Opt_type_44bsd:
 367                         ufs_clear_opt (*mount_options, UFSTYPE);
 368                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 369                         break;
 370                 case Opt_type_ufs2:
 371                         ufs_clear_opt(*mount_options, UFSTYPE);
 372                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 373                         break;
 374                 case Opt_type_hp:
 375                         ufs_clear_opt (*mount_options, UFSTYPE);
 376                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 377                         break;
 378                 case Opt_type_nextstepcd:
 379                         ufs_clear_opt (*mount_options, UFSTYPE);
 380                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 381                         break;
 382                 case Opt_type_nextstep:
 383                         ufs_clear_opt (*mount_options, UFSTYPE);
 384                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 385                         break;
 386                 case Opt_type_openstep:
 387                         ufs_clear_opt (*mount_options, UFSTYPE);
 388                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 389                         break;
 390                 case Opt_onerror_panic:
 391                         ufs_clear_opt (*mount_options, ONERROR);
 392                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 393                         break;
 394                 case Opt_onerror_lock:
 395                         ufs_clear_opt (*mount_options, ONERROR);
 396                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 397                         break;
 398                 case Opt_onerror_umount:
 399                         ufs_clear_opt (*mount_options, ONERROR);
 400                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 401                         break;
 402                 case Opt_onerror_repair:
 403                         printk("UFS-fs: Unable to do repair on error, "
 404                                 "will lock lock instead\n");
 405                         ufs_clear_opt (*mount_options, ONERROR);
 406                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 407                         break;
 408                 default:
 409                         printk("UFS-fs: Invalid option: \"%s\" "
 410                                         "or missing value\n", p);
 411                         return 0;
 412                 }
 413         }
 414         return 1;
 415 }
 416
 417 /*
 418  * Diffrent types of UFS hold fs_cstotal in different
 419  * places, and use diffrent data structure for it.
 420  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
 421  */
 422 static void ufs_setup_cstotal(struct super_block *sb)
 423 {
 424         struct ufs_sb_info *sbi = UFS_SB(sb);
 425         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 426         struct ufs_super_block_first *usb1;
 427         struct ufs_super_block_second *usb2;
 428         struct ufs_super_block_third *usb3;
 429         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 430
 431         UFSD("ENTER, mtype=%u\n", mtype);
 432         usb1 = ubh_get_usb_first(uspi);
 433         usb2 = ubh_get_usb_second(uspi);
 434         usb3 = ubh_get_usb_third(uspi);
 435
 436         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 437              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 438             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 439                 /*we have statistic in different place, then usual*/
 440                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 441                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 442                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 443                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 444         } else {
 445                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 446                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 447                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 448                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 449         }
 450         UFSD("EXIT\n");
 451 }
 452
 453 /*
 454  * Read on-disk structures associated with cylinder groups
 455  */
 456 static int ufs_read_cylinder_structures(struct super_block *sb)
 457 {
 458         struct ufs_sb_info *sbi = UFS_SB(sb);
 459         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 460         struct ufs_buffer_head * ubh;
 461         unsigned char * base, * space;
 462         unsigned size, blks, i;
 463         struct ufs_super_block_third *usb3;
 464
 465         UFSD("ENTER\n");
 466
 467         usb3 = ubh_get_usb_third(uspi);
 468         /*
 469          * Read cs structures from (usually) first data block
 470          * on the device.
 471          */
 472         size = uspi->s_cssize;
 473         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 474         base = space = kmalloc(size, GFP_KERNEL);
 475         if (!base)
 476                 goto failed;
 477         sbi->s_csp = (struct ufs_csum *)space;
 478         for (i = 0; i < blks; i += uspi->s_fpb) {
 479                 size = uspi->s_bsize;
 480                 if (i + uspi->s_fpb > blks)
 481                         size = (blks - i) * uspi->s_fsize;
 482
 483                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 484
 485                 if (!ubh)
 486                         goto failed;
 487
 488                 ubh_ubhcpymem (space, ubh, size);
 489
 490                 space += size;
 491                 ubh_brelse (ubh);
 492                 ubh = NULL;
 493         }
 494
 495         /*
 496          * Read cylinder group (we read only first fragment from block
 497          * at this time) and prepare internal data structures for cg caching.
 498          */
 499         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 500                 goto failed;
 501         for (i = 0; i < uspi->s_ncg; i++)
 502                 sbi->s_ucg[i] = NULL;
 503         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 504                 sbi->s_ucpi[i] = NULL;
 505                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 506         }
 507         for (i = 0; i < uspi->s_ncg; i++) {
 508                 UFSD("read cg %u\n", i);
 509                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 510                         goto failed;
 511                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 512                         goto failed;
 513
 514                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 515         }
 516         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 517                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 518                         goto failed;
 519                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 520         }
 521         sbi->s_cg_loaded = 0;
 522         UFSD("EXIT\n");
 523         return 1;
 524
 525 failed:
 526         kfree (base);
 527         if (sbi->s_ucg) {
 528                 for (i = 0; i < uspi->s_ncg; i++)
 529                         if (sbi->s_ucg[i])
 530                                 brelse (sbi->s_ucg[i]);
 531                 kfree (sbi->s_ucg);
 532                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 533                         kfree (sbi->s_ucpi[i]);
 534         }
 535         UFSD("EXIT (FAILED)\n");
 536         return 0;
 537 }
 538
 539 /*
 540  * Sync our internal copy of fs_cstotal with disk
 541  */
 542 static void ufs_put_cstotal(struct super_block *sb)
 543 {
 544         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 545         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 546         struct ufs_super_block_first *usb1;
 547         struct ufs_super_block_second *usb2;
 548         struct ufs_super_block_third *usb3;
 549
 550         UFSD("ENTER\n");
 551         usb1 = ubh_get_usb_first(uspi);
 552         usb2 = ubh_get_usb_second(uspi);
 553         usb3 = ubh_get_usb_third(uspi);
 554
 555         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 556              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 557             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 558                 /*we have statistic in different place, then usual*/
 559                 usb2->fs_un.fs_u2.cs_ndir =
 560                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 561                 usb2->fs_un.fs_u2.cs_nbfree =
 562                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 563                 usb3->fs_un1.fs_u2.cs_nifree =
 564                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 565                 usb3->fs_un1.fs_u2.cs_nffree =
 566                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 567         } else {
 568                 usb1->fs_cstotal.cs_ndir =
 569                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 570                 usb1->fs_cstotal.cs_nbfree =
 571                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 572                 usb1->fs_cstotal.cs_nifree =
 573                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 574                 usb1->fs_cstotal.cs_nffree =
 575                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 576         }
 577         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 578         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 579         UFSD("EXIT\n");
 580 }
 581
 582 /**
 583  * ufs_put_super_internal() - put on-disk intrenal structures
 584  * @sb: pointer to super_block structure
 585  * Put on-disk structures associated with cylinder groups
 586  * and write them back to disk, also update cs_total on disk
 587  */
 588 static void ufs_put_super_internal(struct super_block *sb)
 589 {
 590         struct ufs_sb_info *sbi = UFS_SB(sb);
 591         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 592         struct ufs_buffer_head * ubh;
 593         unsigned char * base, * space;
 594         unsigned blks, size, i;
 595
 596
 597         UFSD("ENTER\n");
 598
 599         lock_kernel();
 600
 601         ufs_put_cstotal(sb);
 602         size = uspi->s_cssize;
 603         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 604         base = space = (char*) sbi->s_csp;
 605         for (i = 0; i < blks; i += uspi->s_fpb) {
 606                 size = uspi->s_bsize;
 607                 if (i + uspi->s_fpb > blks)
 608                         size = (blks - i) * uspi->s_fsize;
 609
 610                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 611
 612                 ubh_memcpyubh (ubh, space, size);
 613                 space += size;
 614                 ubh_mark_buffer_uptodate (ubh, 1);
 615                 ubh_mark_buffer_dirty (ubh);
 616                 ubh_brelse (ubh);
 617         }
 618         for (i = 0; i < sbi->s_cg_loaded; i++) {
 619                 ufs_put_cylinder (sb, i);
 620                 kfree (sbi->s_ucpi[i]);
 621         }
 622         for (; i < UFS_MAX_GROUP_LOADED; i++)
 623                 kfree (sbi->s_ucpi[i]);
 624         for (i = 0; i < uspi->s_ncg; i++)
 625                 brelse (sbi->s_ucg[i]);
 626         kfree (sbi->s_ucg);
 627         kfree (base);
 628
 629         unlock_kernel();
 630
 631         UFSD("EXIT\n");
 632 }
 633
 634 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 635 {
 636         struct ufs_sb_info * sbi;
 637         struct ufs_sb_private_info * uspi;
 638         struct ufs_super_block_first * usb1;
 639         struct ufs_super_block_second * usb2;
 640         struct ufs_super_block_third * usb3;
 641         struct ufs_buffer_head * ubh;
 642         struct inode *inode;
 643         unsigned block_size, super_block_size;
 644         unsigned flags;
 645         unsigned super_block_offset;
 646         unsigned maxsymlen;
 647         int ret = -EINVAL;
 648
 649         uspi = NULL;
 650         ubh = NULL;
 651         flags = 0;
 652
 653         UFSD("ENTER\n");
 654
 655         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 656         if (!sbi)
 657                 goto failed_nomem;
 658         sb->s_fs_info = sbi;
 659
 660         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 661
 662 #ifndef CONFIG_UFS_FS_WRITE
 663         if (!(sb->s_flags & MS_RDONLY)) {
 664                 printk("ufs was compiled with read-only support, "
 665                 "can't be mounted as read-write\n");
 666                 goto failed;
 667         }
 668 #endif
 669         /*
 670          * Set default mount options
 671          * Parse mount options
 672          */
 673         sbi->s_mount_opt = 0;
 674         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 675         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 676                 printk("wrong mount options\n");
 677                 goto failed;
 678         }
 679         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 680                 if (!silent)
 681                         printk("You didn't specify the type of your ufs filesystem\n\n"
 682                         "mount -t ufs -o ufstype="
 683                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 684                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 685                         "default is ufstype=old\n");
 686                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 687         }
 688
 689         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 690         sbi->s_uspi = uspi;
 691         if (!uspi)
 692                 goto failed;
 693         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 694         super_block_offset=UFS_SBLOCK;
 695
 696         /* Keep 2Gig file limit. Some UFS variants need to override
 697            this but as I don't know which I'll let those in the know loosen
 698            the rules */
 699         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 700         case UFS_MOUNT_UFSTYPE_44BSD:
 701                 UFSD("ufstype=44bsd\n");
 702                 uspi->s_fsize = block_size = 512;
 703                 uspi->s_fmask = ~(512 - 1);
 704                 uspi->s_fshift = 9;
 705                 uspi->s_sbsize = super_block_size = 1536;
 706                 uspi->s_sbbase = 0;
 707                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 708                 break;
 709         case UFS_MOUNT_UFSTYPE_UFS2:
 710                 UFSD("ufstype=ufs2\n");
 711                 super_block_offset=SBLOCK_UFS2;
 712                 uspi->s_fsize = block_size = 512;
 713                 uspi->s_fmask = ~(512 - 1);
 714                 uspi->s_fshift = 9;
 715                 uspi->s_sbsize = super_block_size = 1536;
 716                 uspi->s_sbbase =  0;
 717                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 718                 break;
 719
 720         case UFS_MOUNT_UFSTYPE_SUN:
 721                 UFSD("ufstype=sun\n");
 722                 uspi->s_fsize = block_size = 1024;
 723                 uspi->s_fmask = ~(1024 - 1);
 724                 uspi->s_fshift = 10;
 725                 uspi->s_sbsize = super_block_size = 2048;
 726                 uspi->s_sbbase = 0;
 727                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 728                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 729                 break;
 730
 731         case UFS_MOUNT_UFSTYPE_SUNOS:
 732                 UFSD(("ufstype=sunos\n"))
 733                 uspi->s_fsize = block_size = 1024;
 734                 uspi->s_fmask = ~(1024 - 1);
 735                 uspi->s_fshift = 10;
 736                 uspi->s_sbsize = 2048;
 737                 super_block_size = 2048;
 738                 uspi->s_sbbase = 0;
 739                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 740                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 741                 break;
 742
 743         case UFS_MOUNT_UFSTYPE_SUNx86:
 744                 UFSD("ufstype=sunx86\n");
 745                 uspi->s_fsize = block_size = 1024;
 746                 uspi->s_fmask = ~(1024 - 1);
 747                 uspi->s_fshift = 10;
 748                 uspi->s_sbsize = super_block_size = 2048;
 749                 uspi->s_sbbase = 0;
 750                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 751                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 752                 break;
 753
 754         case UFS_MOUNT_UFSTYPE_OLD:
 755                 UFSD("ufstype=old\n");
 756                 uspi->s_fsize = block_size = 1024;
 757                 uspi->s_fmask = ~(1024 - 1);
 758                 uspi->s_fshift = 10;
 759                 uspi->s_sbsize = super_block_size = 2048;
 760                 uspi->s_sbbase = 0;
 761                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 762                 if (!(sb->s_flags & MS_RDONLY)) {
 763                         if (!silent)
 764                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 765                         sb->s_flags |= MS_RDONLY;
 766                 }
 767                 break;
 768
 769         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 770                 UFSD("ufstype=nextstep\n");
 771                 uspi->s_fsize = block_size = 1024;
 772                 uspi->s_fmask = ~(1024 - 1);
 773                 uspi->s_fshift = 10;
 774                 uspi->s_sbsize = super_block_size = 2048;
 775                 uspi->s_sbbase = 0;
 776                 uspi->s_dirblksize = 1024;
 777                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 778                 if (!(sb->s_flags & MS_RDONLY)) {
 779                         if (!silent)
 780                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 781                         sb->s_flags |= MS_RDONLY;
 782                 }
 783                 break;
 784
 785         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 786                 UFSD("ufstype=nextstep-cd\n");
 787                 uspi->s_fsize = block_size = 2048;
 788                 uspi->s_fmask = ~(2048 - 1);
 789                 uspi->s_fshift = 11;
 790                 uspi->s_sbsize = super_block_size = 2048;
 791                 uspi->s_sbbase = 0;
 792                 uspi->s_dirblksize = 1024;
 793                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 794                 if (!(sb->s_flags & MS_RDONLY)) {
 795                         if (!silent)
 796                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 797                         sb->s_flags |= MS_RDONLY;
 798                 }
 799                 break;
 800
 801         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 802                 UFSD("ufstype=openstep\n");
 803                 uspi->s_fsize = block_size = 1024;
 804                 uspi->s_fmask = ~(1024 - 1);
 805                 uspi->s_fshift = 10;
 806                 uspi->s_sbsize = super_block_size = 2048;
 807                 uspi->s_sbbase = 0;
 808                 uspi->s_dirblksize = 1024;
 809                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 810                 if (!(sb->s_flags & MS_RDONLY)) {
 811                         if (!silent)
 812                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 813                         sb->s_flags |= MS_RDONLY;
 814                 }
 815                 break;
 816
 817         case UFS_MOUNT_UFSTYPE_HP:
 818                 UFSD("ufstype=hp\n");
 819                 uspi->s_fsize = block_size = 1024;
 820                 uspi->s_fmask = ~(1024 - 1);
 821                 uspi->s_fshift = 10;
 822                 uspi->s_sbsize = super_block_size = 2048;
 823                 uspi->s_sbbase = 0;
 824                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 825                 if (!(sb->s_flags & MS_RDONLY)) {
 826                         if (!silent)
 827                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 828                         sb->s_flags |= MS_RDONLY;
 829                 }
 830                 break;
 831         default:
 832                 if (!silent)
 833                         printk("unknown ufstype\n");
 834                 goto failed;
 835         }
 836
 837 again:
 838         if (!sb_set_blocksize(sb, block_size)) {
 839                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 840                 goto failed;
 841         }
 842
 843         /*
 844          * read ufs super block from device
 845          */
 846
 847         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 848
 849         if (!ubh)
 850             goto failed;
 851
 852         usb1 = ubh_get_usb_first(uspi);
 853         usb2 = ubh_get_usb_second(uspi);
 854         usb3 = ubh_get_usb_third(uspi);
 855
 856         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 857         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 858         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 859             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 860                 flags &= ~UFS_ST_MASK;
 861                 flags |=  UFS_ST_SUN;
 862         }
 863
 864         /*
 865          * Check ufs magic number
 866          */
 867         sbi->s_bytesex = BYTESEX_LE;
 868         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 869                 case UFS_MAGIC:
 870                 case UFS2_MAGIC:
 871                 case UFS_MAGIC_LFN:
 872                 case UFS_MAGIC_FEA:
 873                 case UFS_MAGIC_4GB:
 874                         goto magic_found;
 875         }
 876         sbi->s_bytesex = BYTESEX_BE;
 877         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 878                 case UFS_MAGIC:
 879                 case UFS2_MAGIC:
 880                 case UFS_MAGIC_LFN:
 881                 case UFS_MAGIC_FEA:
 882                 case UFS_MAGIC_4GB:
 883                         goto magic_found;
 884         }
 885
 886         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 887           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 888           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 889           && uspi->s_sbbase < 256) {
 890                 ubh_brelse_uspi(uspi);
 891                 ubh = NULL;
 892                 uspi->s_sbbase += 8;
 893                 goto again;
 894         }
 895         if (!silent)
 896                 printk("ufs_read_super: bad magic number\n");
 897         goto failed;
 898
 899 magic_found:
 900         /*
 901          * Check block and fragment sizes
 902          */
 903         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 904         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 905         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 906         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 907         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 908
 909         if (!is_power_of_2(uspi->s_fsize)) {
 910                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 911                         uspi->s_fsize);
 912                         goto failed;
 913         }
 914         if (uspi->s_fsize < 512) {
 915                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 916                         uspi->s_fsize);
 917                 goto failed;
 918         }
 919         if (uspi->s_fsize > 4096) {
 920                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 921                         uspi->s_fsize);
 922                 goto failed;
 923         }
 924         if (!is_power_of_2(uspi->s_bsize)) {
 925                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 926                         uspi->s_bsize);
 927                 goto failed;
 928         }
 929         if (uspi->s_bsize < 4096) {
 930                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 931                         uspi->s_bsize);
 932                 goto failed;
 933         }
 934         if (uspi->s_bsize / uspi->s_fsize > 8) {
 935                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 936                         uspi->s_bsize / uspi->s_fsize);
 937                 goto failed;
 938         }
 939         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 940                 ubh_brelse_uspi(uspi);
 941                 ubh = NULL;
 942                 block_size = uspi->s_fsize;
 943                 super_block_size = uspi->s_sbsize;
 944                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 945                 goto again;
 946         }
 947
 948         sbi->s_flags = flags;/*after that line some functions use s_flags*/
 949         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 950
 951         /*
 952          * Check, if file system was correctly unmounted.
 953          * If not, make it read only.
 954          */
 955         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 956           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 957           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 958             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 959           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 960           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 961                 switch(usb1->fs_clean) {
 962                 case UFS_FSCLEAN:
 963                         UFSD("fs is clean\n");
 964                         break;
 965                 case UFS_FSSTABLE:
 966                         UFSD("fs is stable\n");
 967                         break;
 968                 case UFS_FSOSF1:
 969                         UFSD("fs is DEC OSF/1\n");
 970                         break;
 971                 case UFS_FSACTIVE:
 972                         printk("ufs_read_super: fs is active\n");
 973                         sb->s_flags |= MS_RDONLY;
 974                         break;
 975                 case UFS_FSBAD:
 976                         printk("ufs_read_super: fs is bad\n");
 977                         sb->s_flags |= MS_RDONLY;
 978                         break;
 979                 default:
 980                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 981                         sb->s_flags |= MS_RDONLY;
 982                         break;
 983                 }
 984         } else {
 985                 printk("ufs_read_super: fs needs fsck\n");
 986                 sb->s_flags |= MS_RDONLY;
 987         }
 988
 989         /*
 990          * Read ufs_super_block into internal data structures
 991          */
 992         sb->s_op = &ufs_super_ops;
 993         sb->dq_op = NULL; /***/
 994         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 995
 996         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 997         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 998         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 999         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1000         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1001         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1002
1003         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1004                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1005                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1006         } else {
1007                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1008                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1009         }
1010
1011         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1012         /* s_bsize already set */
1013         /* s_fsize already set */
1014         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1015         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1016         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1017         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1018         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1019         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1020         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1021                 uspi->s_fshift);
1022         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1023         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1024         /* s_sbsize already set */
1025         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1026         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1027         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1028         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1029         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1030         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1031         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1032         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1033
1034         if (uspi->fs_magic == UFS2_MAGIC)
1035                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1036         else
1037                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1038
1039         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1040         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1041         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1042         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1043         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1044         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1045         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1046         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1047         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1048         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1049         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1050         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1051         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1052         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1053
1054         /*
1055          * Compute another frequently used values
1056          */
1057         uspi->s_fpbmask = uspi->s_fpb - 1;
1058         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1059                 uspi->s_apbshift = uspi->s_bshift - 3;
1060         else
1061                 uspi->s_apbshift = uspi->s_bshift - 2;
1062
1063         uspi->s_2apbshift = uspi->s_apbshift * 2;
1064         uspi->s_3apbshift = uspi->s_apbshift * 3;
1065         uspi->s_apb = 1 << uspi->s_apbshift;
1066         uspi->s_2apb = 1 << uspi->s_2apbshift;
1067         uspi->s_3apb = 1 << uspi->s_3apbshift;
1068         uspi->s_apbmask = uspi->s_apb - 1;
1069         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1070         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1071         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1072         uspi->s_bpf = uspi->s_fsize << 3;
1073         uspi->s_bpfshift = uspi->s_fshift + 3;
1074         uspi->s_bpfmask = uspi->s_bpf - 1;
1075         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1076             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1077                 uspi->s_maxsymlinklen =
1078                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1079
1080         if (uspi->fs_magic == UFS2_MAGIC)
1081                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1082         else
1083                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1084         if (uspi->s_maxsymlinklen > maxsymlen) {
1085                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1086                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1087                 uspi->s_maxsymlinklen = maxsymlen;
1088         }
1089
1090         inode = ufs_iget(sb, UFS_ROOTINO);
1091         if (IS_ERR(inode)) {
1092                 ret = PTR_ERR(inode);
1093                 goto failed;
1094         }
1095         sb->s_root = d_alloc_root(inode);
1096         if (!sb->s_root) {
1097                 ret = -ENOMEM;
1098                 goto dalloc_failed;
1099         }
1100
1101         ufs_setup_cstotal(sb);
1102         /*
1103          * Read cylinder group structures
1104          */
1105         if (!(sb->s_flags & MS_RDONLY))
1106                 if (!ufs_read_cylinder_structures(sb))
1107                         goto failed;
1108
1109         UFSD("EXIT\n");
1110         return 0;
1111
1112 dalloc_failed:
1113         iput(inode);
1114 failed:
1115         if (ubh)
1116                 ubh_brelse_uspi (uspi);
1117         kfree (uspi);
1118         kfree(sbi);
1119         sb->s_fs_info = NULL;
1120         UFSD("EXIT (FAILED)\n");
1121         return ret;
1122
1123 failed_nomem:
1124         UFSD("EXIT (NOMEM)\n");
1125         return -ENOMEM;
1126 }
1127
1128 static int ufs_sync_fs(struct super_block *sb, int wait)
1129 {
1130         struct ufs_sb_private_info * uspi;
1131         struct ufs_super_block_first * usb1;
1132         struct ufs_super_block_third * usb3;
1133         unsigned flags;
1134
1135         lock_super(sb);
1136         lock_kernel();
1137
1138         UFSD("ENTER\n");
1139
1140         flags = UFS_SB(sb)->s_flags;
1141         uspi = UFS_SB(sb)->s_uspi;
1142         usb1 = ubh_get_usb_first(uspi);
1143         usb3 = ubh_get_usb_third(uspi);
1144
1145         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1146         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
1147             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1148             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1149                 ufs_set_fs_state(sb, usb1, usb3,
1150                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1151         ufs_put_cstotal(sb);
1152         sb->s_dirt = 0;
1153
1154         UFSD("EXIT\n");
1155         unlock_kernel();
1156         unlock_super(sb);
1157
1158         return 0;
1159 }
1160
1161 static void ufs_write_super(struct super_block *sb)
1162 {
1163         if (!(sb->s_flags & MS_RDONLY))
1164                 ufs_sync_fs(sb, 1);
1165         else
1166                 sb->s_dirt = 0;
1167 }
1168
1169 static void ufs_put_super(struct super_block *sb)
1170 {
1171         struct ufs_sb_info * sbi = UFS_SB(sb);
1172
1173         UFSD("ENTER\n");
1174
1175         if (sb->s_dirt)
1176                 ufs_write_super(sb);
1177
1178         if (!(sb->s_flags & MS_RDONLY))
1179                 ufs_put_super_internal(sb);
1180
1181         ubh_brelse_uspi (sbi->s_uspi);
1182         kfree (sbi->s_uspi);
1183         kfree (sbi);
1184         sb->s_fs_info = NULL;
1185         UFSD("EXIT\n");
1186         return;
1187 }
1188
1189
1190 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1191 {
1192         struct ufs_sb_private_info * uspi;
1193         struct ufs_super_block_first * usb1;
1194         struct ufs_super_block_third * usb3;
1195         unsigned new_mount_opt, ufstype;
1196         unsigned flags;
1197
1198         lock_kernel();
1199         lock_super(sb);
1200         uspi = UFS_SB(sb)->s_uspi;
1201         flags = UFS_SB(sb)->s_flags;
1202         usb1 = ubh_get_usb_first(uspi);
1203         usb3 = ubh_get_usb_third(uspi);
1204
1205         /*
1206          * Allow the "check" option to be passed as a remount option.
1207          * It is not possible to change ufstype option during remount
1208          */
1209         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1210         new_mount_opt = 0;
1211         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1212         if (!ufs_parse_options (data, &new_mount_opt)) {
1213                 unlock_super(sb);
1214                 unlock_kernel();
1215                 return -EINVAL;
1216         }
1217         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1218                 new_mount_opt |= ufstype;
1219         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1220                 printk("ufstype can't be changed during remount\n");
1221                 unlock_super(sb);
1222                 unlock_kernel();
1223                 return -EINVAL;
1224         }
1225
1226         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1227                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1228                 unlock_super(sb);
1229                 unlock_kernel();
1230                 return 0;
1231         }
1232
1233         /*
1234          * fs was mouted as rw, remounting ro
1235          */
1236         if (*mount_flags & MS_RDONLY) {
1237                 ufs_put_super_internal(sb);
1238                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1239                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1240                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1241                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1242                         ufs_set_fs_state(sb, usb1, usb3,
1243                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1244                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1245                 sb->s_dirt = 0;
1246                 sb->s_flags |= MS_RDONLY;
1247         } else {
1248         /*
1249          * fs was mounted as ro, remounting rw
1250          */
1251 #ifndef CONFIG_UFS_FS_WRITE
1252                 printk("ufs was compiled with read-only support, "
1253                 "can't be mounted as read-write\n");
1254                 unlock_super(sb);
1255                 unlock_kernel();
1256                 return -EINVAL;
1257 #else
1258                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1259                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1260                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1261                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1262                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1263                         printk("this ufstype is read-only supported\n");
1264                         unlock_super(sb);
1265                         unlock_kernel();
1266                         return -EINVAL;
1267                 }
1268                 if (!ufs_read_cylinder_structures(sb)) {
1269                         printk("failed during remounting\n");
1270                         unlock_super(sb);
1271                         unlock_kernel();
1272                         return -EPERM;
1273                 }
1274                 sb->s_flags &= ~MS_RDONLY;
1275 #endif
1276         }
1277         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1278         unlock_super(sb);
1279         unlock_kernel();
1280         return 0;
1281 }
1282
1283 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1284 {
1285         struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1286         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1287         const struct match_token *tp = tokens;
1288
1289         while (tp->token != Opt_onerror_panic && tp->token != mval)
1290                 ++tp;
1291         BUG_ON(tp->token == Opt_onerror_panic);
1292         seq_printf(seq, ",%s", tp->pattern);
1293
1294         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1295         while (tp->token != Opt_err && tp->token != mval)
1296                 ++tp;
1297         BUG_ON(tp->token == Opt_err);
1298         seq_printf(seq, ",%s", tp->pattern);
1299
1300         return 0;
1301 }
1302
1303 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1304 {
1305         struct super_block *sb = dentry->d_sb;
1306         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1307         unsigned  flags = UFS_SB(sb)->s_flags;
1308         struct ufs_super_block_first *usb1;
1309         struct ufs_super_block_second *usb2;
1310         struct ufs_super_block_third *usb3;
1311         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1312
1313         lock_kernel();
1314
1315         usb1 = ubh_get_usb_first(uspi);
1316         usb2 = ubh_get_usb_second(uspi);
1317         usb3 = ubh_get_usb_third(uspi);
1318
1319         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1320                 buf->f_type = UFS2_MAGIC;
1321                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1322         } else {
1323                 buf->f_type = UFS_MAGIC;
1324                 buf->f_blocks = uspi->s_dsize;
1325         }
1326         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1327                 uspi->cs_total.cs_nffree;
1328         buf->f_ffree = uspi->cs_total.cs_nifree;
1329         buf->f_bsize = sb->s_blocksize;
1330         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1331                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1332         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1333         buf->f_namelen = UFS_MAXNAMLEN;
1334         buf->f_fsid.val[0] = (u32)id;
1335         buf->f_fsid.val[1] = (u32)(id >> 32);
1336
1337         unlock_kernel();
1338
1339         return 0;
1340 }
1341
1342 static struct kmem_cache * ufs_inode_cachep;
1343
1344 static struct inode *ufs_alloc_inode(struct super_block *sb)
1345 {
1346         struct ufs_inode_info *ei;
1347         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1348         if (!ei)
1349                 return NULL;
1350         ei->vfs_inode.i_version = 1;
1351         return &ei->vfs_inode;
1352 }
1353
1354 static void ufs_destroy_inode(struct inode *inode)
1355 {
1356         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1357 }
1358
1359 static void init_once(void *foo)
1360 {
1361         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1362
1363         inode_init_once(&ei->vfs_inode);
1364 }
1365
1366 static int init_inodecache(void)
1367 {
1368         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1369                                              sizeof(struct ufs_inode_info),
1370                                              0, (SLAB_RECLAIM_ACCOUNT|
1371                                                 SLAB_MEM_SPREAD),
1372                                              init_once);
1373         if (ufs_inode_cachep == NULL)
1374                 return -ENOMEM;
1375         return 0;
1376 }
1377
1378 static void destroy_inodecache(void)
1379 {
1380         kmem_cache_destroy(ufs_inode_cachep);
1381 }
1382
1383 #ifdef CONFIG_QUOTA
1384 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1385 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1386 #endif
1387
1388 static const struct super_operations ufs_super_ops = {
1389         .alloc_inode    = ufs_alloc_inode,
1390         .destroy_inode  = ufs_destroy_inode,
1391         .write_inode    = ufs_write_inode,
1392         .delete_inode   = ufs_delete_inode,
1393         .put_super      = ufs_put_super,
1394         .write_super    = ufs_write_super,
1395         .sync_fs        = ufs_sync_fs,
1396         .statfs         = ufs_statfs,
1397         .remount_fs     = ufs_remount,
1398         .show_options   = ufs_show_options,
1399 #ifdef CONFIG_QUOTA
1400         .quota_read     = ufs_quota_read,
1401         .quota_write    = ufs_quota_write,
1402 #endif
1403 };
1404
1405 #ifdef CONFIG_QUOTA
1406
1407 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1408  * acquiring the locks... As quota files are never truncated and quota code
1409  * itself serializes the operations (and noone else should touch the files)
1410  * we don't have to be afraid of races */
1411 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1412                                size_t len, loff_t off)
1413 {
1414         struct inode *inode = sb_dqopt(sb)->files[type];
1415         sector_t blk = off >> sb->s_blocksize_bits;
1416         int err = 0;
1417         int offset = off & (sb->s_blocksize - 1);
1418         int tocopy;
1419         size_t toread;
1420         struct buffer_head *bh;
1421         loff_t i_size = i_size_read(inode);
1422
1423         if (off > i_size)
1424                 return 0;
1425         if (off+len > i_size)
1426                 len = i_size-off;
1427         toread = len;
1428         while (toread > 0) {
1429                 tocopy = sb->s_blocksize - offset < toread ?
1430                                 sb->s_blocksize - offset : toread;
1431
1432                 bh = ufs_bread(inode, blk, 0, &err);
1433                 if (err)
1434                         return err;
1435                 if (!bh)        /* A hole? */
1436                         memset(data, 0, tocopy);
1437                 else {
1438                         memcpy(data, bh->b_data+offset, tocopy);
1439                         brelse(bh);
1440                 }
1441                 offset = 0;
1442                 toread -= tocopy;
1443                 data += tocopy;
1444                 blk++;
1445         }
1446         return len;
1447 }
1448
1449 /* Write to quotafile */
1450 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1451                                 const char *data, size_t len, loff_t off)
1452 {
1453         struct inode *inode = sb_dqopt(sb)->files[type];
1454         sector_t blk = off >> sb->s_blocksize_bits;
1455         int err = 0;
1456         int offset = off & (sb->s_blocksize - 1);
1457         int tocopy;
1458         size_t towrite = len;
1459         struct buffer_head *bh;
1460
1461         mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1462         while (towrite > 0) {
1463                 tocopy = sb->s_blocksize - offset < towrite ?
1464                                 sb->s_blocksize - offset : towrite;
1465
1466                 bh = ufs_bread(inode, blk, 1, &err);
1467                 if (!bh)
1468                         goto out;
1469                 lock_buffer(bh);
1470                 memcpy(bh->b_data+offset, data, tocopy);
1471                 flush_dcache_page(bh->b_page);
1472                 set_buffer_uptodate(bh);
1473                 mark_buffer_dirty(bh);
1474                 unlock_buffer(bh);
1475                 brelse(bh);
1476                 offset = 0;
1477                 towrite -= tocopy;
1478                 data += tocopy;
1479                 blk++;
1480         }
1481 out:
1482         if (len == towrite) {
1483                 mutex_unlock(&inode->i_mutex);
1484                 return err;
1485         }
1486         if (inode->i_size < off+len-towrite)
1487                 i_size_write(inode, off+len-towrite);
1488         inode->i_version++;
1489         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1490         mark_inode_dirty(inode);
1491         mutex_unlock(&inode->i_mutex);
1492         return len - towrite;
1493 }
1494
1495 #endif
1496
1497 static int ufs_get_sb(struct file_system_type *fs_type,
1498         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1499 {
1500         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1501 }
1502
1503 static struct file_system_type ufs_fs_type = {
1504         .owner          = THIS_MODULE,
1505         .name           = "ufs",
1506         .get_sb         = ufs_get_sb,
1507         .kill_sb        = kill_block_super,
1508         .fs_flags       = FS_REQUIRES_DEV,
1509 };
1510
1511 static int __init init_ufs_fs(void)
1512 {
1513         int err = init_inodecache();
1514         if (err)
1515                 goto out1;
1516         err = register_filesystem(&ufs_fs_type);
1517         if (err)
1518                 goto out;
1519         return 0;
1520 out:
1521         destroy_inodecache();
1522 out1:
1523         return err;
1524 }
1525
1526 static void __exit exit_ufs_fs(void)
1527 {
1528         unregister_filesystem(&ufs_fs_type);
1529         destroy_inodecache();
1530 }
1531
1532 module_init(init_ufs_fs)
1533 module_exit(exit_ufs_fs)
1534 MODULE_LICENSE("GPL");