linux/fs/ufs/super.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 *  linux/fs/ufs/super.c
   4 *
   5 * Copyright (C) 1998
   6 * Daniel Pirkl <daniel.pirkl@email.cz>
   7 * Charles University, Faculty of Mathematics and Physics
   8 */
   9
  10/* Derived from
  11 *
  12 *  linux/fs/ext2/super.c
  13 *
  14 * Copyright (C) 1992, 1993, 1994, 1995
  15 * Remy Card (card@masi.ibp.fr)
  16 * Laboratoire MASI - Institut Blaise Pascal
  17 * Universite Pierre et Marie Curie (Paris VI)
  18 *
  19 *  from
  20 *
  21 *  linux/fs/minix/inode.c
  22 *
  23 *  Copyright (C) 1991, 1992  Linus Torvalds
  24 *
  25 *  Big-endian to little-endian byte-swapping/bitmaps by
  26 *        David S. Miller (davem@caip.rutgers.edu), 1995
  27 */
  28 
  29/*
  30 * Inspired by
  31 *
  32 *  linux/fs/ufs/super.c
  33 *
  34 * Copyright (C) 1996
  35 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  36 * Laboratory for Computer Science Research Computing Facility
  37 * Rutgers, The State University of New Jersey
  38 *
  39 * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  40 *
  41 * Kernel module support added on 96/04/26 by
  42 * Stefan Reinauer <stepan@home.culture.mipt.ru>
  43 *
  44 * Module usage counts added on 96/04/29 by
  45 * Gertjan van Wingerde <gwingerde@gmail.com>
  46 *
  47 * Clean swab support on 19970406 by
  48 * Francois-Rene Rideau <fare@tunes.org>
  49 *
  50 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  51 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  52 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  53 *
  54 * NeXTstep support added on February 5th 1998 by
  55 * Niels Kristian Bech Jensen <nkbj@image.dk>.
  56 *
  57 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  58 * 
  59 * HP/UX hfs filesystem support added by
  60 * Martin K. Petersen <mkp@mkp.net>, August 1999
  61 *
  62 * UFS2 (of FreeBSD 5.x) support added by
  63 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  64 *
  65 * UFS2 write support added by
  66 * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  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 <linux/uaccess.h>
  76
  77#include <linux/errno.h>
  78#include <linux/fs.h>
  79#include <linux/slab.h>
  80#include <linux/time.h>
  81#include <linux/stat.h>
  82#include <linux/string.h>
  83#include <linux/blkdev.h>
  84#include <linux/backing-dev.h>
  85#include <linux/init.h>
  86#include <linux/parser.h>
  87#include <linux/buffer_head.h>
  88#include <linux/vfs.h>
  89#include <linux/log2.h>
  90#include <linux/mount.h>
  91#include <linux/seq_file.h>
  92#include <linux/iversion.h>
  93
  94#include "ufs_fs.h"
  95#include "ufs.h"
  96#include "swab.h"
  97#include "util.h"
  98
  99static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 100{
 101        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 102        struct inode *inode;
 103
 104        if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 105                return ERR_PTR(-ESTALE);
 106
 107        inode = ufs_iget(sb, ino);
 108        if (IS_ERR(inode))
 109                return ERR_CAST(inode);
 110        if (generation && inode->i_generation != generation) {
 111                iput(inode);
 112                return ERR_PTR(-ESTALE);
 113        }
 114        return inode;
 115}
 116
 117static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 118                                       int fh_len, int fh_type)
 119{
 120        return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 121}
 122
 123static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 124                                       int fh_len, int fh_type)
 125{
 126        return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 127}
 128
 129static struct dentry *ufs_get_parent(struct dentry *child)
 130{
 131        struct qstr dot_dot = QSTR_INIT("..", 2);
 132        ino_t ino;
 133
 134        ino = ufs_inode_by_name(d_inode(child), &dot_dot);
 135        if (!ino)
 136                return ERR_PTR(-ENOENT);
 137        return d_obtain_alias(ufs_iget(child->d_sb, ino));
 138}
 139
 140static const struct export_operations ufs_export_ops = {
 141        .fh_to_dentry   = ufs_fh_to_dentry,
 142        .fh_to_parent   = ufs_fh_to_parent,
 143        .get_parent     = ufs_get_parent,
 144};
 145
 146#ifdef CONFIG_UFS_DEBUG
 147/*
 148 * Print contents of ufs_super_block, useful for debugging
 149 */
 150static void ufs_print_super_stuff(struct super_block *sb,
 151                                  struct ufs_super_block_first *usb1,
 152                                  struct ufs_super_block_second *usb2,
 153                                  struct ufs_super_block_third *usb3)
 154{
 155        u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 156
 157        pr_debug("ufs_print_super_stuff\n");
 158        pr_debug("  magic:     0x%x\n", magic);
 159        if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 160                pr_debug("  fs_size:   %llu\n", (unsigned long long)
 161                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 162                pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
 163                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 164                pr_debug("  bsize:         %u\n",
 165                         fs32_to_cpu(sb, usb1->fs_bsize));
 166                pr_debug("  fsize:         %u\n",
 167                         fs32_to_cpu(sb, usb1->fs_fsize));
 168                pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 169                pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
 170                         fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 171                pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 172                         fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 173                pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
 174                         (unsigned long long)
 175                         fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 176                pr_info("  cs_nifree(Num of free inodes): %llu\n",
 177                        (unsigned long long)
 178                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 179                pr_info("  cs_nffree(Num of free frags): %llu\n",
 180                        (unsigned long long)
 181                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 182                pr_info("  fs_maxsymlinklen: %u\n",
 183                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 184        } else {
 185                pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 186                pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 187                pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 188                pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 189                pr_debug(" cgoffset:    %u\n",
 190                         fs32_to_cpu(sb, usb1->fs_cgoffset));
 191                pr_debug(" ~cgmask:     0x%x\n",
 192                         ~fs32_to_cpu(sb, usb1->fs_cgmask));
 193                pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 194                pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 195                pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 196                pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 197                pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 198                pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 199                pr_debug(" fragshift:   %u\n",
 200                         fs32_to_cpu(sb, usb1->fs_fragshift));
 201                pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 202                pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 203                pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 204                pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 205                pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 206                pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 207                pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 208                pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 209                pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 210                pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 211                pr_debug(" fstodb:      %u\n",
 212                         fs32_to_cpu(sb, usb1->fs_fsbtodb));
 213                pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 214                pr_debug(" ndir         %u\n",
 215                         fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 216                pr_debug(" nifree       %u\n",
 217                         fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 218                pr_debug(" nbfree       %u\n",
 219                         fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 220                pr_debug(" nffree       %u\n",
 221                         fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 222        }
 223        pr_debug("\n");
 224}
 225
 226/*
 227 * Print contents of ufs_cylinder_group, useful for debugging
 228 */
 229static void ufs_print_cylinder_stuff(struct super_block *sb,
 230                                     struct ufs_cylinder_group *cg)
 231{
 232        pr_debug("\nufs_print_cylinder_stuff\n");
 233        pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 234        pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 235        pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 236        pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 237        pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 238        pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 239        pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 240        pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 241        pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 242        pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 243        pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 244        pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 245        pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 246        pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 247        pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 248            fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 249            fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 250            fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 251            fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 252        pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 253        pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 254        pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 255        pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 256        pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 257        pr_debug("  clustersumoff %u\n",
 258                 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 259        pr_debug("  clusteroff    %u\n",
 260                 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 261        pr_debug("  nclusterblks  %u\n",
 262                 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 263        pr_debug("\n");
 264}
 265#else
 266#  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 267#  define ufs_print_cylinder_stuff(sb, cg) /**/
 268#endif /* CONFIG_UFS_DEBUG */
 269
 270static const struct super_operations ufs_super_ops;
 271
 272void ufs_error (struct super_block * sb, const char * function,
 273        const char * fmt, ...)
 274{
 275        struct ufs_sb_private_info * uspi;
 276        struct ufs_super_block_first * usb1;
 277        struct va_format vaf;
 278        va_list args;
 279
 280        uspi = UFS_SB(sb)->s_uspi;
 281        usb1 = ubh_get_usb_first(uspi);
 282        
 283        if (!sb_rdonly(sb)) {
 284                usb1->fs_clean = UFS_FSBAD;
 285                ubh_mark_buffer_dirty(USPI_UBH(uspi));
 286                ufs_mark_sb_dirty(sb);
 287                sb->s_flags |= SB_RDONLY;
 288        }
 289        va_start(args, fmt);
 290        vaf.fmt = fmt;
 291        vaf.va = &args;
 292        switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 293        case UFS_MOUNT_ONERROR_PANIC:
 294                panic("panic (device %s): %s: %pV\n",
 295                      sb->s_id, function, &vaf);
 296
 297        case UFS_MOUNT_ONERROR_LOCK:
 298        case UFS_MOUNT_ONERROR_UMOUNT:
 299        case UFS_MOUNT_ONERROR_REPAIR:
 300                pr_crit("error (device %s): %s: %pV\n",
 301                        sb->s_id, function, &vaf);
 302        }
 303        va_end(args);
 304}
 305
 306void ufs_panic (struct super_block * sb, const char * function,
 307        const char * fmt, ...)
 308{
 309        struct ufs_sb_private_info * uspi;
 310        struct ufs_super_block_first * usb1;
 311        struct va_format vaf;
 312        va_list args;
 313        
 314        uspi = UFS_SB(sb)->s_uspi;
 315        usb1 = ubh_get_usb_first(uspi);
 316        
 317        if (!sb_rdonly(sb)) {
 318                usb1->fs_clean = UFS_FSBAD;
 319                ubh_mark_buffer_dirty(USPI_UBH(uspi));
 320                ufs_mark_sb_dirty(sb);
 321        }
 322        va_start(args, fmt);
 323        vaf.fmt = fmt;
 324        vaf.va = &args;
 325        sb->s_flags |= SB_RDONLY;
 326        pr_crit("panic (device %s): %s: %pV\n",
 327                sb->s_id, function, &vaf);
 328        va_end(args);
 329}
 330
 331void ufs_warning (struct super_block * sb, const char * function,
 332        const char * fmt, ...)
 333{
 334        struct va_format vaf;
 335        va_list args;
 336
 337        va_start(args, fmt);
 338        vaf.fmt = fmt;
 339        vaf.va = &args;
 340        pr_warn("(device %s): %s: %pV\n",
 341                sb->s_id, function, &vaf);
 342        va_end(args);
 343}
 344
 345enum {
 346       Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 347       Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 348       Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 349       Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 350       Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 351       Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 352       Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 353       Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 354       Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 355       Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 356       Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 357       Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 358       Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 359       Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 360       Opt_err
 361};
 362
 363static const match_table_t tokens = {
 364        {Opt_type_old, "ufstype=old"},
 365        {Opt_type_sunx86, "ufstype=sunx86"},
 366        {Opt_type_sun, "ufstype=sun"},
 367        {Opt_type_sunos, "ufstype=sunos"},
 368        {Opt_type_44bsd, "ufstype=44bsd"},
 369        {Opt_type_ufs2, "ufstype=ufs2"},
 370        {Opt_type_ufs2, "ufstype=5xbsd"},
 371        {Opt_type_hp, "ufstype=hp"},
 372        {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 373        {Opt_type_nextstep, "ufstype=nextstep"},
 374        {Opt_type_openstep, "ufstype=openstep"},
 375/*end of possible ufs types */
 376        {Opt_onerror_panic, "onerror=panic"},
 377        {Opt_onerror_lock, "onerror=lock"},
 378        {Opt_onerror_umount, "onerror=umount"},
 379        {Opt_onerror_repair, "onerror=repair"},
 380        {Opt_err, NULL}
 381};
 382
 383static int ufs_parse_options (char * options, unsigned * mount_options)
 384{
 385        char * p;
 386        
 387        UFSD("ENTER\n");
 388        
 389        if (!options)
 390                return 1;
 391
 392        while ((p = strsep(&options, ",")) != NULL) {
 393                substring_t args[MAX_OPT_ARGS];
 394                int token;
 395                if (!*p)
 396                        continue;
 397
 398                token = match_token(p, tokens, args);
 399                switch (token) {
 400                case Opt_type_old:
 401                        ufs_clear_opt (*mount_options, UFSTYPE);
 402                        ufs_set_opt (*mount_options, UFSTYPE_OLD);
 403                        break;
 404                case Opt_type_sunx86:
 405                        ufs_clear_opt (*mount_options, UFSTYPE);
 406                        ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 407                        break;
 408                case Opt_type_sun:
 409                        ufs_clear_opt (*mount_options, UFSTYPE);
 410                        ufs_set_opt (*mount_options, UFSTYPE_SUN);
 411                        break;
 412                case Opt_type_sunos:
 413                        ufs_clear_opt(*mount_options, UFSTYPE);
 414                        ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 415                        break;
 416                case Opt_type_44bsd:
 417                        ufs_clear_opt (*mount_options, UFSTYPE);
 418                        ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 419                        break;
 420                case Opt_type_ufs2:
 421                        ufs_clear_opt(*mount_options, UFSTYPE);
 422                        ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 423                        break;
 424                case Opt_type_hp:
 425                        ufs_clear_opt (*mount_options, UFSTYPE);
 426                        ufs_set_opt (*mount_options, UFSTYPE_HP);
 427                        break;
 428                case Opt_type_nextstepcd:
 429                        ufs_clear_opt (*mount_options, UFSTYPE);
 430                        ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 431                        break;
 432                case Opt_type_nextstep:
 433                        ufs_clear_opt (*mount_options, UFSTYPE);
 434                        ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 435                        break;
 436                case Opt_type_openstep:
 437                        ufs_clear_opt (*mount_options, UFSTYPE);
 438                        ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 439                        break;
 440                case Opt_onerror_panic:
 441                        ufs_clear_opt (*mount_options, ONERROR);
 442                        ufs_set_opt (*mount_options, ONERROR_PANIC);
 443                        break;
 444                case Opt_onerror_lock:
 445                        ufs_clear_opt (*mount_options, ONERROR);
 446                        ufs_set_opt (*mount_options, ONERROR_LOCK);
 447                        break;
 448                case Opt_onerror_umount:
 449                        ufs_clear_opt (*mount_options, ONERROR);
 450                        ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 451                        break;
 452                case Opt_onerror_repair:
 453                        pr_err("Unable to do repair on error, will lock lock instead\n");
 454                        ufs_clear_opt (*mount_options, ONERROR);
 455                        ufs_set_opt (*mount_options, ONERROR_REPAIR);
 456                        break;
 457                default:
 458                        pr_err("Invalid option: \"%s\" or missing value\n", p);
 459                        return 0;
 460                }
 461        }
 462        return 1;
 463}
 464
 465/*
 466 * Different types of UFS hold fs_cstotal in different
 467 * places, and use different data structure for it.
 468 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
 469 */
 470static void ufs_setup_cstotal(struct super_block *sb)
 471{
 472        struct ufs_sb_info *sbi = UFS_SB(sb);
 473        struct ufs_sb_private_info *uspi = sbi->s_uspi;
 474        struct ufs_super_block_first *usb1;
 475        struct ufs_super_block_second *usb2;
 476        struct ufs_super_block_third *usb3;
 477        unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 478
 479        UFSD("ENTER, mtype=%u\n", mtype);
 480        usb1 = ubh_get_usb_first(uspi);
 481        usb2 = ubh_get_usb_second(uspi);
 482        usb3 = ubh_get_usb_third(uspi);
 483
 484        if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 485             (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) ||
 486            mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 487                /*we have statistic in different place, then usual*/
 488                uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 489                uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 490                uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 491                uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 492        } else {
 493                uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 494                uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 495                uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 496                uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 497        }
 498        UFSD("EXIT\n");
 499}
 500
 501/*
 502 * Read on-disk structures associated with cylinder groups
 503 */
 504static int ufs_read_cylinder_structures(struct super_block *sb)
 505{
 506        struct ufs_sb_info *sbi = UFS_SB(sb);
 507        struct ufs_sb_private_info *uspi = sbi->s_uspi;
 508        struct ufs_buffer_head * ubh;
 509        unsigned char * base, * space;
 510        unsigned size, blks, i;
 511
 512        UFSD("ENTER\n");
 513
 514        /*
 515         * Read cs structures from (usually) first data block
 516         * on the device. 
 517         */
 518        size = uspi->s_cssize;
 519        blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 520        base = space = kmalloc(size, GFP_NOFS);
 521        if (!base)
 522                goto failed; 
 523        sbi->s_csp = (struct ufs_csum *)space;
 524        for (i = 0; i < blks; i += uspi->s_fpb) {
 525                size = uspi->s_bsize;
 526                if (i + uspi->s_fpb > blks)
 527                        size = (blks - i) * uspi->s_fsize;
 528
 529                ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 530                
 531                if (!ubh)
 532                        goto failed;
 533
 534                ubh_ubhcpymem (space, ubh, size);
 535
 536                space += size;
 537                ubh_brelse (ubh);
 538                ubh = NULL;
 539        }
 540
 541        /*
 542         * Read cylinder group (we read only first fragment from block
 543         * at this time) and prepare internal data structures for cg caching.
 544         */
 545        sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *),
 546                                   GFP_NOFS);
 547        if (!sbi->s_ucg)
 548                goto failed;
 549        for (i = 0; i < uspi->s_ncg; i++) 
 550                sbi->s_ucg[i] = NULL;
 551        for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 552                sbi->s_ucpi[i] = NULL;
 553                sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 554        }
 555        for (i = 0; i < uspi->s_ncg; i++) {
 556                UFSD("read cg %u\n", i);
 557                if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 558                        goto failed;
 559                if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 560                        goto failed;
 561
 562                ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 563        }
 564        for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 565                if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
 566                        goto failed;
 567                sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 568        }
 569        sbi->s_cg_loaded = 0;
 570        UFSD("EXIT\n");
 571        return 1;
 572
 573failed:
 574        kfree (base);
 575        if (sbi->s_ucg) {
 576                for (i = 0; i < uspi->s_ncg; i++)
 577                        if (sbi->s_ucg[i])
 578                                brelse (sbi->s_ucg[i]);
 579                kfree (sbi->s_ucg);
 580                for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 581                        kfree (sbi->s_ucpi[i]);
 582        }
 583        UFSD("EXIT (FAILED)\n");
 584        return 0;
 585}
 586
 587/*
 588 * Sync our internal copy of fs_cstotal with disk
 589 */
 590static void ufs_put_cstotal(struct super_block *sb)
 591{
 592        unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 593        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 594        struct ufs_super_block_first *usb1;
 595        struct ufs_super_block_second *usb2;
 596        struct ufs_super_block_third *usb3;
 597
 598        UFSD("ENTER\n");
 599        usb1 = ubh_get_usb_first(uspi);
 600        usb2 = ubh_get_usb_second(uspi);
 601        usb3 = ubh_get_usb_third(uspi);
 602
 603        if (mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 604                /*we have statistic in different place, then usual*/
 605                usb2->fs_un.fs_u2.cs_ndir =
 606                        cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 607                usb2->fs_un.fs_u2.cs_nbfree =
 608                        cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 609                usb3->fs_un1.fs_u2.cs_nifree =
 610                        cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 611                usb3->fs_un1.fs_u2.cs_nffree =
 612                        cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 613                goto out;
 614        }
 615
 616        if (mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 617             (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) {
 618                /* store stats in both old and new places */
 619                usb2->fs_un.fs_u2.cs_ndir =
 620                        cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 621                usb2->fs_un.fs_u2.cs_nbfree =
 622                        cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 623                usb3->fs_un1.fs_u2.cs_nifree =
 624                        cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 625                usb3->fs_un1.fs_u2.cs_nffree =
 626                        cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 627        }
 628        usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 629        usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 630        usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 631        usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 632out:
 633        ubh_mark_buffer_dirty(USPI_UBH(uspi));
 634        ufs_print_super_stuff(sb, usb1, usb2, usb3);
 635        UFSD("EXIT\n");
 636}
 637
 638/**
 639 * ufs_put_super_internal() - put on-disk intrenal structures
 640 * @sb: pointer to super_block structure
 641 * Put on-disk structures associated with cylinder groups
 642 * and write them back to disk, also update cs_total on disk
 643 */
 644static void ufs_put_super_internal(struct super_block *sb)
 645{
 646        struct ufs_sb_info *sbi = UFS_SB(sb);
 647        struct ufs_sb_private_info *uspi = sbi->s_uspi;
 648        struct ufs_buffer_head * ubh;
 649        unsigned char * base, * space;
 650        unsigned blks, size, i;
 651
 652        
 653        UFSD("ENTER\n");
 654
 655        ufs_put_cstotal(sb);
 656        size = uspi->s_cssize;
 657        blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 658        base = space = (char*) sbi->s_csp;
 659        for (i = 0; i < blks; i += uspi->s_fpb) {
 660                size = uspi->s_bsize;
 661                if (i + uspi->s_fpb > blks)
 662                        size = (blks - i) * uspi->s_fsize;
 663
 664                ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 665
 666                ubh_memcpyubh (ubh, space, size);
 667                space += size;
 668                ubh_mark_buffer_uptodate (ubh, 1);
 669                ubh_mark_buffer_dirty (ubh);
 670                ubh_brelse (ubh);
 671        }
 672        for (i = 0; i < sbi->s_cg_loaded; i++) {
 673                ufs_put_cylinder (sb, i);
 674                kfree (sbi->s_ucpi[i]);
 675        }
 676        for (; i < UFS_MAX_GROUP_LOADED; i++) 
 677                kfree (sbi->s_ucpi[i]);
 678        for (i = 0; i < uspi->s_ncg; i++) 
 679                brelse (sbi->s_ucg[i]);
 680        kfree (sbi->s_ucg);
 681        kfree (base);
 682
 683        UFSD("EXIT\n");
 684}
 685
 686static int ufs_sync_fs(struct super_block *sb, int wait)
 687{
 688        struct ufs_sb_private_info * uspi;
 689        struct ufs_super_block_first * usb1;
 690        struct ufs_super_block_third * usb3;
 691        unsigned flags;
 692
 693        mutex_lock(&UFS_SB(sb)->s_lock);
 694
 695        UFSD("ENTER\n");
 696
 697        flags = UFS_SB(sb)->s_flags;
 698        uspi = UFS_SB(sb)->s_uspi;
 699        usb1 = ubh_get_usb_first(uspi);
 700        usb3 = ubh_get_usb_third(uspi);
 701
 702        usb1->fs_time = ufs_get_seconds(sb);
 703        if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
 704            (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 705            (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 706                ufs_set_fs_state(sb, usb1, usb3,
 707                                UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 708        ufs_put_cstotal(sb);
 709
 710        UFSD("EXIT\n");
 711        mutex_unlock(&UFS_SB(sb)->s_lock);
 712
 713        return 0;
 714}
 715
 716static void delayed_sync_fs(struct work_struct *work)
 717{
 718        struct ufs_sb_info *sbi;
 719
 720        sbi = container_of(work, struct ufs_sb_info, sync_work.work);
 721
 722        spin_lock(&sbi->work_lock);
 723        sbi->work_queued = 0;
 724        spin_unlock(&sbi->work_lock);
 725
 726        ufs_sync_fs(sbi->sb, 1);
 727}
 728
 729void ufs_mark_sb_dirty(struct super_block *sb)
 730{
 731        struct ufs_sb_info *sbi = UFS_SB(sb);
 732        unsigned long delay;
 733
 734        spin_lock(&sbi->work_lock);
 735        if (!sbi->work_queued) {
 736                delay = msecs_to_jiffies(dirty_writeback_interval * 10);
 737                queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
 738                sbi->work_queued = 1;
 739        }
 740        spin_unlock(&sbi->work_lock);
 741}
 742
 743static void ufs_put_super(struct super_block *sb)
 744{
 745        struct ufs_sb_info * sbi = UFS_SB(sb);
 746
 747        UFSD("ENTER\n");
 748
 749        if (!sb_rdonly(sb))
 750                ufs_put_super_internal(sb);
 751        cancel_delayed_work_sync(&sbi->sync_work);
 752
 753        ubh_brelse_uspi (sbi->s_uspi);
 754        kfree (sbi->s_uspi);
 755        kfree (sbi);
 756        sb->s_fs_info = NULL;
 757        UFSD("EXIT\n");
 758        return;
 759}
 760
 761static u64 ufs_max_bytes(struct super_block *sb)
 762{
 763        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 764        int bits = uspi->s_apbshift;
 765        u64 res;
 766
 767        if (bits > 21)
 768                res = ~0ULL;
 769        else
 770                res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
 771                        (1LL << (3*bits));
 772
 773        if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
 774                return MAX_LFS_FILESIZE;
 775        return res << uspi->s_bshift;
 776}
 777
 778static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 779{
 780        struct ufs_sb_info * sbi;
 781        struct ufs_sb_private_info * uspi;
 782        struct ufs_super_block_first * usb1;
 783        struct ufs_super_block_second * usb2;
 784        struct ufs_super_block_third * usb3;
 785        struct ufs_buffer_head * ubh;   
 786        struct inode *inode;
 787        unsigned block_size, super_block_size;
 788        unsigned flags;
 789        unsigned super_block_offset;
 790        unsigned maxsymlen;
 791        int ret = -EINVAL;
 792
 793        uspi = NULL;
 794        ubh = NULL;
 795        flags = 0;
 796        
 797        UFSD("ENTER\n");
 798
 799#ifndef CONFIG_UFS_FS_WRITE
 800        if (!sb_rdonly(sb)) {
 801                pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 802                return -EROFS;
 803        }
 804#endif
 805                
 806        sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 807        if (!sbi)
 808                goto failed_nomem;
 809        sb->s_fs_info = sbi;
 810        sbi->sb = sb;
 811
 812        UFSD("flag %u\n", (int)(sb_rdonly(sb)));
 813        
 814        mutex_init(&sbi->s_lock);
 815        spin_lock_init(&sbi->work_lock);
 816        INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
 817        /*
 818         * Set default mount options
 819         * Parse mount options
 820         */
 821        sbi->s_mount_opt = 0;
 822        ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 823        if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 824                pr_err("wrong mount options\n");
 825                goto failed;
 826        }
 827        if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 828                if (!silent)
 829                        pr_err("You didn't specify the type of your ufs filesystem\n\n"
 830                        "mount -t ufs -o ufstype="
 831                        "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 832                        ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 833                        "default is ufstype=old\n");
 834                ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 835        }
 836
 837        uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 838        sbi->s_uspi = uspi;
 839        if (!uspi)
 840                goto failed;
 841        uspi->s_dirblksize = UFS_SECTOR_SIZE;
 842        super_block_offset=UFS_SBLOCK;
 843
 844        sb->s_maxbytes = MAX_LFS_FILESIZE;
 845
 846        sb->s_time_gran = NSEC_PER_SEC;
 847        sb->s_time_min = S32_MIN;
 848        sb->s_time_max = S32_MAX;
 849
 850        switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 851        case UFS_MOUNT_UFSTYPE_44BSD:
 852                UFSD("ufstype=44bsd\n");
 853                uspi->s_fsize = block_size = 512;
 854                uspi->s_fmask = ~(512 - 1);
 855                uspi->s_fshift = 9;
 856                uspi->s_sbsize = super_block_size = 1536;
 857                uspi->s_sbbase = 0;
 858                flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 859                break;
 860        case UFS_MOUNT_UFSTYPE_UFS2:
 861                UFSD("ufstype=ufs2\n");
 862                super_block_offset=SBLOCK_UFS2;
 863                uspi->s_fsize = block_size = 512;
 864                uspi->s_fmask = ~(512 - 1);
 865                uspi->s_fshift = 9;
 866                uspi->s_sbsize = super_block_size = 1536;
 867                uspi->s_sbbase =  0;
 868                sb->s_time_gran = 1;
 869                sb->s_time_min = S64_MIN;
 870                sb->s_time_max = S64_MAX;
 871                flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 872                break;
 873                
 874        case UFS_MOUNT_UFSTYPE_SUN:
 875                UFSD("ufstype=sun\n");
 876                uspi->s_fsize = block_size = 1024;
 877                uspi->s_fmask = ~(1024 - 1);
 878                uspi->s_fshift = 10;
 879                uspi->s_sbsize = super_block_size = 2048;
 880                uspi->s_sbbase = 0;
 881                uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 882                flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 883                break;
 884
 885        case UFS_MOUNT_UFSTYPE_SUNOS:
 886                UFSD("ufstype=sunos\n");
 887                uspi->s_fsize = block_size = 1024;
 888                uspi->s_fmask = ~(1024 - 1);
 889                uspi->s_fshift = 10;
 890                uspi->s_sbsize = 2048;
 891                super_block_size = 2048;
 892                uspi->s_sbbase = 0;
 893                uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 894                flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 895                break;
 896
 897        case UFS_MOUNT_UFSTYPE_SUNx86:
 898                UFSD("ufstype=sunx86\n");
 899                uspi->s_fsize = block_size = 1024;
 900                uspi->s_fmask = ~(1024 - 1);
 901                uspi->s_fshift = 10;
 902                uspi->s_sbsize = super_block_size = 2048;
 903                uspi->s_sbbase = 0;
 904                uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 905                flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 906                break;
 907
 908        case UFS_MOUNT_UFSTYPE_OLD:
 909                UFSD("ufstype=old\n");
 910                uspi->s_fsize = block_size = 1024;
 911                uspi->s_fmask = ~(1024 - 1);
 912                uspi->s_fshift = 10;
 913                uspi->s_sbsize = super_block_size = 2048;
 914                uspi->s_sbbase = 0;
 915                flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 916                if (!sb_rdonly(sb)) {
 917                        if (!silent)
 918                                pr_info("ufstype=old is supported read-only\n");
 919                        sb->s_flags |= SB_RDONLY;
 920                }
 921                break;
 922        
 923        case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 924                UFSD("ufstype=nextstep\n");
 925                uspi->s_fsize = block_size = 1024;
 926                uspi->s_fmask = ~(1024 - 1);
 927                uspi->s_fshift = 10;
 928                uspi->s_sbsize = super_block_size = 2048;
 929                uspi->s_sbbase = 0;
 930                uspi->s_dirblksize = 1024;
 931                flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 932                if (!sb_rdonly(sb)) {
 933                        if (!silent)
 934                                pr_info("ufstype=nextstep is supported read-only\n");
 935                        sb->s_flags |= SB_RDONLY;
 936                }
 937                break;
 938        
 939        case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 940                UFSD("ufstype=nextstep-cd\n");
 941                uspi->s_fsize = block_size = 2048;
 942                uspi->s_fmask = ~(2048 - 1);
 943                uspi->s_fshift = 11;
 944                uspi->s_sbsize = super_block_size = 2048;
 945                uspi->s_sbbase = 0;
 946                uspi->s_dirblksize = 1024;
 947                flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 948                if (!sb_rdonly(sb)) {
 949                        if (!silent)
 950                                pr_info("ufstype=nextstep-cd is supported read-only\n");
 951                        sb->s_flags |= SB_RDONLY;
 952                }
 953                break;
 954        
 955        case UFS_MOUNT_UFSTYPE_OPENSTEP:
 956                UFSD("ufstype=openstep\n");
 957                uspi->s_fsize = block_size = 1024;
 958                uspi->s_fmask = ~(1024 - 1);
 959                uspi->s_fshift = 10;
 960                uspi->s_sbsize = super_block_size = 2048;
 961                uspi->s_sbbase = 0;
 962                uspi->s_dirblksize = 1024;
 963                flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 964                if (!sb_rdonly(sb)) {
 965                        if (!silent)
 966                                pr_info("ufstype=openstep is supported read-only\n");
 967                        sb->s_flags |= SB_RDONLY;
 968                }
 969                break;
 970        
 971        case UFS_MOUNT_UFSTYPE_HP:
 972                UFSD("ufstype=hp\n");
 973                uspi->s_fsize = block_size = 1024;
 974                uspi->s_fmask = ~(1024 - 1);
 975                uspi->s_fshift = 10;
 976                uspi->s_sbsize = super_block_size = 2048;
 977                uspi->s_sbbase = 0;
 978                flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 979                if (!sb_rdonly(sb)) {
 980                        if (!silent)
 981                                pr_info("ufstype=hp is supported read-only\n");
 982                        sb->s_flags |= SB_RDONLY;
 983                }
 984                break;
 985        default:
 986                if (!silent)
 987                        pr_err("unknown ufstype\n");
 988                goto failed;
 989        }
 990        
 991again:  
 992        if (!sb_set_blocksize(sb, block_size)) {
 993                pr_err("failed to set blocksize\n");
 994                goto failed;
 995        }
 996
 997        /*
 998         * read ufs super block from device
 999         */
1000
1001        ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
1002        
1003        if (!ubh) 
1004            goto failed;
1005
1006        usb1 = ubh_get_usb_first(uspi);
1007        usb2 = ubh_get_usb_second(uspi);
1008        usb3 = ubh_get_usb_third(uspi);
1009
1010        /* Sort out mod used on SunOS 4.1.3 for fs_state */
1011        uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1012        if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1013            (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1014                flags &= ~UFS_ST_MASK;
1015                flags |=  UFS_ST_SUN;
1016        }
1017
1018        if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1019            uspi->s_postblformat == UFS_42POSTBLFMT) {
1020                if (!silent)
1021                        pr_err("this is not a 44bsd filesystem");
1022                goto failed;
1023        }
1024
1025        /*
1026         * Check ufs magic number
1027         */
1028        sbi->s_bytesex = BYTESEX_LE;
1029        switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1030                case UFS_MAGIC:
1031                case UFS_MAGIC_BW:
1032                case UFS2_MAGIC:
1033                case UFS_MAGIC_LFN:
1034                case UFS_MAGIC_FEA:
1035                case UFS_MAGIC_4GB:
1036                        goto magic_found;
1037        }
1038        sbi->s_bytesex = BYTESEX_BE;
1039        switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1040                case UFS_MAGIC:
1041                case UFS_MAGIC_BW:
1042                case UFS2_MAGIC:
1043                case UFS_MAGIC_LFN:
1044                case UFS_MAGIC_FEA:
1045                case UFS_MAGIC_4GB:
1046                        goto magic_found;
1047        }
1048
1049        if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
1050          || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
1051          || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
1052          && uspi->s_sbbase < 256) {
1053                ubh_brelse_uspi(uspi);
1054                ubh = NULL;
1055                uspi->s_sbbase += 8;
1056                goto again;
1057        }
1058        if (!silent)
1059                pr_err("%s(): bad magic number\n", __func__);
1060        goto failed;
1061
1062magic_found:
1063        /*
1064         * Check block and fragment sizes
1065         */
1066        uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1067        uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1068        uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1069        uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1070        uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1071
1072        if (!is_power_of_2(uspi->s_fsize)) {
1073                pr_err("%s(): fragment size %u is not a power of 2\n",
1074                       __func__, uspi->s_fsize);
1075                goto failed;
1076        }
1077        if (uspi->s_fsize < 512) {
1078                pr_err("%s(): fragment size %u is too small\n",
1079                       __func__, uspi->s_fsize);
1080                goto failed;
1081        }
1082        if (uspi->s_fsize > 4096) {
1083                pr_err("%s(): fragment size %u is too large\n",
1084                       __func__, uspi->s_fsize);
1085                goto failed;
1086        }
1087        if (!is_power_of_2(uspi->s_bsize)) {
1088                pr_err("%s(): block size %u is not a power of 2\n",
1089                       __func__, uspi->s_bsize);
1090                goto failed;
1091        }
1092        if (uspi->s_bsize < 4096) {
1093                pr_err("%s(): block size %u is too small\n",
1094                       __func__, uspi->s_bsize);
1095                goto failed;
1096        }
1097        if (uspi->s_bsize / uspi->s_fsize > 8) {
1098                pr_err("%s(): too many fragments per block (%u)\n",
1099                       __func__, uspi->s_bsize / uspi->s_fsize);
1100                goto failed;
1101        }
1102        if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1103                ubh_brelse_uspi(uspi);
1104                ubh = NULL;
1105                block_size = uspi->s_fsize;
1106                super_block_size = uspi->s_sbsize;
1107                UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1108                goto again;
1109        }
1110
1111        sbi->s_flags = flags;/*after that line some functions use s_flags*/
1112        ufs_print_super_stuff(sb, usb1, usb2, usb3);
1113
1114        /*
1115         * Check, if file system was correctly unmounted.
1116         * If not, make it read only.
1117         */
1118        if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1119          ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1120          (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1121            (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1122          (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1123          (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1124                switch(usb1->fs_clean) {
1125                case UFS_FSCLEAN:
1126                        UFSD("fs is clean\n");
1127                        break;
1128                case UFS_FSSTABLE:
1129                        UFSD("fs is stable\n");
1130                        break;
1131                case UFS_FSLOG:
1132                        UFSD("fs is logging fs\n");
1133                        break;
1134                case UFS_FSOSF1:
1135                        UFSD("fs is DEC OSF/1\n");
1136                        break;
1137                case UFS_FSACTIVE:
1138                        pr_err("%s(): fs is active\n", __func__);
1139                        sb->s_flags |= SB_RDONLY;
1140                        break;
1141                case UFS_FSBAD:
1142                        pr_err("%s(): fs is bad\n", __func__);
1143                        sb->s_flags |= SB_RDONLY;
1144                        break;
1145                default:
1146                        pr_err("%s(): can't grok fs_clean 0x%x\n",
1147                               __func__, usb1->fs_clean);
1148                        sb->s_flags |= SB_RDONLY;
1149                        break;
1150                }
1151        } else {
1152                pr_err("%s(): fs needs fsck\n", __func__);
1153                sb->s_flags |= SB_RDONLY;
1154        }
1155
1156        /*
1157         * Read ufs_super_block into internal data structures
1158         */
1159        sb->s_op = &ufs_super_ops;
1160        sb->s_export_op = &ufs_export_ops;
1161
1162        sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1163
1164        uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1165        uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1166        uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1167        uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1168        uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1169        uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1170
1171        if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1172                uspi->s_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1173                uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1174        } else {
1175                uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1176                uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1177        }
1178
1179        uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1180        /* s_bsize already set */
1181        /* s_fsize already set */
1182        uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1183        uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1184        uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1185        uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1186        uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1187        uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1188        UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1189                uspi->s_fshift);
1190        uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1191        uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1192        /* s_sbsize already set */
1193        uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1194        uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1195        uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1196        uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1197        uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1198        uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1199        uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1200        uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1201
1202        if (uspi->fs_magic == UFS2_MAGIC)
1203                uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1204        else
1205                uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1206
1207        uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1208        uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1209        uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1210        uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1211        uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1212        uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1213        uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1214        uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1215        uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1216        uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1217        uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1218        uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1219        uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1220        uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1221
1222        uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1223                                              uspi->s_minfree, 100);
1224        if (uspi->s_minfree <= 5) {
1225                uspi->s_time_to_space = ~0ULL;
1226                uspi->s_space_to_time = 0;
1227                usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1228        } else {
1229                uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1230                uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1231                                              uspi->s_minfree - 2, 100) - 1;
1232        }
1233
1234        /*
1235         * Compute another frequently used values
1236         */
1237        uspi->s_fpbmask = uspi->s_fpb - 1;
1238        if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1239                uspi->s_apbshift = uspi->s_bshift - 3;
1240        else
1241                uspi->s_apbshift = uspi->s_bshift - 2;
1242
1243        uspi->s_2apbshift = uspi->s_apbshift * 2;
1244        uspi->s_3apbshift = uspi->s_apbshift * 3;
1245        uspi->s_apb = 1 << uspi->s_apbshift;
1246        uspi->s_2apb = 1 << uspi->s_2apbshift;
1247        uspi->s_3apb = 1 << uspi->s_3apbshift;
1248        uspi->s_apbmask = uspi->s_apb - 1;
1249        uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1250        uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1251        uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1252        uspi->s_bpf = uspi->s_fsize << 3;
1253        uspi->s_bpfshift = uspi->s_fshift + 3;
1254        uspi->s_bpfmask = uspi->s_bpf - 1;
1255        if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1256            (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1257                uspi->s_maxsymlinklen =
1258                    fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1259
1260        if (uspi->fs_magic == UFS2_MAGIC)
1261                maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1262        else
1263                maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1264        if (uspi->s_maxsymlinklen > maxsymlen) {
1265                ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1266                            "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1267                uspi->s_maxsymlinklen = maxsymlen;
1268        }
1269        sb->s_maxbytes = ufs_max_bytes(sb);
1270        sb->s_max_links = UFS_LINK_MAX;
1271
1272        inode = ufs_iget(sb, UFS_ROOTINO);
1273        if (IS_ERR(inode)) {
1274                ret = PTR_ERR(inode);
1275                goto failed;
1276        }
1277        sb->s_root = d_make_root(inode);
1278        if (!sb->s_root) {
1279                ret = -ENOMEM;
1280                goto failed;
1281        }
1282
1283        ufs_setup_cstotal(sb);
1284        /*
1285         * Read cylinder group structures
1286         */
1287        if (!sb_rdonly(sb))
1288                if (!ufs_read_cylinder_structures(sb))
1289                        goto failed;
1290
1291        UFSD("EXIT\n");
1292        return 0;
1293
1294failed:
1295        if (ubh)
1296                ubh_brelse_uspi (uspi);
1297        kfree (uspi);
1298        kfree(sbi);
1299        sb->s_fs_info = NULL;
1300        UFSD("EXIT (FAILED)\n");
1301        return ret;
1302
1303failed_nomem:
1304        UFSD("EXIT (NOMEM)\n");
1305        return -ENOMEM;
1306}
1307
1308static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1309{
1310        struct ufs_sb_private_info * uspi;
1311        struct ufs_super_block_first * usb1;
1312        struct ufs_super_block_third * usb3;
1313        unsigned new_mount_opt, ufstype;
1314        unsigned flags;
1315
1316        sync_filesystem(sb);
1317        mutex_lock(&UFS_SB(sb)->s_lock);
1318        uspi = UFS_SB(sb)->s_uspi;
1319        flags = UFS_SB(sb)->s_flags;
1320        usb1 = ubh_get_usb_first(uspi);
1321        usb3 = ubh_get_usb_third(uspi);
1322        
1323        /*
1324         * Allow the "check" option to be passed as a remount option.
1325         * It is not possible to change ufstype option during remount
1326         */
1327        ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1328        new_mount_opt = 0;
1329        ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1330        if (!ufs_parse_options (data, &new_mount_opt)) {
1331                mutex_unlock(&UFS_SB(sb)->s_lock);
1332                return -EINVAL;
1333        }
1334        if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1335                new_mount_opt |= ufstype;
1336        } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1337                pr_err("ufstype can't be changed during remount\n");
1338                mutex_unlock(&UFS_SB(sb)->s_lock);
1339                return -EINVAL;
1340        }
1341
1342        if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) {
1343                UFS_SB(sb)->s_mount_opt = new_mount_opt;
1344                mutex_unlock(&UFS_SB(sb)->s_lock);
1345                return 0;
1346        }
1347        
1348        /*
1349         * fs was mouted as rw, remounting ro
1350         */
1351        if (*mount_flags & SB_RDONLY) {
1352                ufs_put_super_internal(sb);
1353                usb1->fs_time = ufs_get_seconds(sb);
1354                if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1355                  || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1356                  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1357                        ufs_set_fs_state(sb, usb1, usb3,
1358                                UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1359                ubh_mark_buffer_dirty (USPI_UBH(uspi));
1360                sb->s_flags |= SB_RDONLY;
1361        } else {
1362        /*
1363         * fs was mounted as ro, remounting rw
1364         */
1365#ifndef CONFIG_UFS_FS_WRITE
1366                pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1367                mutex_unlock(&UFS_SB(sb)->s_lock);
1368                return -EINVAL;
1369#else
1370                if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1371                    ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1372                    ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1373                    ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1374                    ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1375                        pr_err("this ufstype is read-only supported\n");
1376                        mutex_unlock(&UFS_SB(sb)->s_lock);
1377                        return -EINVAL;
1378                }
1379                if (!ufs_read_cylinder_structures(sb)) {
1380                        pr_err("failed during remounting\n");
1381                        mutex_unlock(&UFS_SB(sb)->s_lock);
1382                        return -EPERM;
1383                }
1384                sb->s_flags &= ~SB_RDONLY;
1385#endif
1386        }
1387        UFS_SB(sb)->s_mount_opt = new_mount_opt;
1388        mutex_unlock(&UFS_SB(sb)->s_lock);
1389        return 0;
1390}
1391
1392static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1393{
1394        struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1395        unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1396        const struct match_token *tp = tokens;
1397
1398        while (tp->token != Opt_onerror_panic && tp->token != mval)
1399                ++tp;
1400        BUG_ON(tp->token == Opt_onerror_panic);
1401        seq_printf(seq, ",%s", tp->pattern);
1402
1403        mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1404        while (tp->token != Opt_err && tp->token != mval)
1405                ++tp;
1406        BUG_ON(tp->token == Opt_err);
1407        seq_printf(seq, ",%s", tp->pattern);
1408
1409        return 0;
1410}
1411
1412static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1413{
1414        struct super_block *sb = dentry->d_sb;
1415        struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1416        unsigned  flags = UFS_SB(sb)->s_flags;
1417        u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1418
1419        mutex_lock(&UFS_SB(sb)->s_lock);
1420        
1421        if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1422                buf->f_type = UFS2_MAGIC;
1423        else
1424                buf->f_type = UFS_MAGIC;
1425
1426        buf->f_blocks = uspi->s_dsize;
1427        buf->f_bfree = ufs_freefrags(uspi);
1428        buf->f_ffree = uspi->cs_total.cs_nifree;
1429        buf->f_bsize = sb->s_blocksize;
1430        buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1431                ? (buf->f_bfree - uspi->s_root_blocks) : 0;
1432        buf->f_files = uspi->s_ncg * uspi->s_ipg;
1433        buf->f_namelen = UFS_MAXNAMLEN;
1434        buf->f_fsid.val[0] = (u32)id;
1435        buf->f_fsid.val[1] = (u32)(id >> 32);
1436
1437        mutex_unlock(&UFS_SB(sb)->s_lock);
1438
1439        return 0;
1440}
1441
1442static struct kmem_cache * ufs_inode_cachep;
1443
1444static struct inode *ufs_alloc_inode(struct super_block *sb)
1445{
1446        struct ufs_inode_info *ei;
1447
1448        ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1449        if (!ei)
1450                return NULL;
1451
1452        inode_set_iversion(&ei->vfs_inode, 1);
1453        seqlock_init(&ei->meta_lock);
1454        mutex_init(&ei->truncate_mutex);
1455        return &ei->vfs_inode;
1456}
1457
1458static void ufs_free_in_core_inode(struct inode *inode)
1459{
1460        kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1461}
1462
1463static void init_once(void *foo)
1464{
1465        struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1466
1467        inode_init_once(&ei->vfs_inode);
1468}
1469
1470static int __init init_inodecache(void)
1471{
1472        ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
1473                                sizeof(struct ufs_inode_info), 0,
1474                                (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
1475                                        SLAB_ACCOUNT),
1476                                offsetof(struct ufs_inode_info, i_u1.i_symlink),
1477                                sizeof_field(struct ufs_inode_info,
1478                                        i_u1.i_symlink),
1479                                init_once);
1480        if (ufs_inode_cachep == NULL)
1481                return -ENOMEM;
1482        return 0;
1483}
1484
1485static void destroy_inodecache(void)
1486{
1487        /*
1488         * Make sure all delayed rcu free inodes are flushed before we
1489         * destroy cache.
1490         */
1491        rcu_barrier();
1492        kmem_cache_destroy(ufs_inode_cachep);
1493}
1494
1495static const struct super_operations ufs_super_ops = {
1496        .alloc_inode    = ufs_alloc_inode,
1497        .free_inode     = ufs_free_in_core_inode,
1498        .write_inode    = ufs_write_inode,
1499        .evict_inode    = ufs_evict_inode,
1500        .put_super      = ufs_put_super,
1501        .sync_fs        = ufs_sync_fs,
1502        .statfs         = ufs_statfs,
1503        .remount_fs     = ufs_remount,
1504        .show_options   = ufs_show_options,
1505};
1506
1507static struct dentry *ufs_mount(struct file_system_type *fs_type,
1508        int flags, const char *dev_name, void *data)
1509{
1510        return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1511}
1512
1513static struct file_system_type ufs_fs_type = {
1514        .owner          = THIS_MODULE,
1515        .name           = "ufs",
1516        .mount          = ufs_mount,
1517        .kill_sb        = kill_block_super,
1518        .fs_flags       = FS_REQUIRES_DEV,
1519};
1520MODULE_ALIAS_FS("ufs");
1521
1522static int __init init_ufs_fs(void)
1523{
1524        int err = init_inodecache();
1525        if (err)
1526                goto out1;
1527        err = register_filesystem(&ufs_fs_type);
1528        if (err)
1529                goto out;
1530        return 0;
1531out:
1532        destroy_inodecache();
1533out1:
1534        return err;
1535}
1536
1537static void __exit exit_ufs_fs(void)
1538{
1539        unregister_filesystem(&ufs_fs_type);
1540        destroy_inodecache();
1541}
1542
1543module_init(init_ufs_fs)
1544module_exit(exit_ufs_fs)
1545MODULE_LICENSE("GPL");
1546