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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  *  linux/fs/ufs/super.c
0004  *
0005  * Copyright (C) 1998
0006  * Daniel Pirkl <daniel.pirkl@email.cz>
0007  * Charles University, Faculty of Mathematics and Physics
0008  */
0009 
0010 /* Derived from
0011  *
0012  *  linux/fs/ext2/super.c
0013  *
0014  * Copyright (C) 1992, 1993, 1994, 1995
0015  * Remy Card (card@masi.ibp.fr)
0016  * Laboratoire MASI - Institut Blaise Pascal
0017  * Universite Pierre et Marie Curie (Paris VI)
0018  *
0019  *  from
0020  *
0021  *  linux/fs/minix/inode.c
0022  *
0023  *  Copyright (C) 1991, 1992  Linus Torvalds
0024  *
0025  *  Big-endian to little-endian byte-swapping/bitmaps by
0026  *        David S. Miller (davem@caip.rutgers.edu), 1995
0027  */
0028  
0029 /*
0030  * Inspired by
0031  *
0032  *  linux/fs/ufs/super.c
0033  *
0034  * Copyright (C) 1996
0035  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
0036  * Laboratory for Computer Science Research Computing Facility
0037  * Rutgers, The State University of New Jersey
0038  *
0039  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
0040  *
0041  * Kernel module support added on 96/04/26 by
0042  * Stefan Reinauer <stepan@home.culture.mipt.ru>
0043  *
0044  * Module usage counts added on 96/04/29 by
0045  * Gertjan van Wingerde <gwingerde@gmail.com>
0046  *
0047  * Clean swab support on 19970406 by
0048  * Francois-Rene Rideau <fare@tunes.org>
0049  *
0050  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
0051  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
0052  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
0053  *
0054  * NeXTstep support added on February 5th 1998 by
0055  * Niels Kristian Bech Jensen <nkbj@image.dk>.
0056  *
0057  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
0058  * 
0059  * HP/UX hfs filesystem support added by
0060  * Martin K. Petersen <mkp@mkp.net>, August 1999
0061  *
0062  * UFS2 (of FreeBSD 5.x) support added by
0063  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
0064  *
0065  * UFS2 write support added by
0066  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
0067  */
0068 
0069 #include <linux/exportfs.h>
0070 #include <linux/module.h>
0071 #include <linux/bitops.h>
0072 
0073 #include <linux/stdarg.h>
0074 
0075 #include <linux/uaccess.h>
0076 
0077 #include <linux/errno.h>
0078 #include <linux/fs.h>
0079 #include <linux/slab.h>
0080 #include <linux/time.h>
0081 #include <linux/stat.h>
0082 #include <linux/string.h>
0083 #include <linux/blkdev.h>
0084 #include <linux/backing-dev.h>
0085 #include <linux/init.h>
0086 #include <linux/parser.h>
0087 #include <linux/buffer_head.h>
0088 #include <linux/vfs.h>
0089 #include <linux/log2.h>
0090 #include <linux/mount.h>
0091 #include <linux/seq_file.h>
0092 #include <linux/iversion.h>
0093 
0094 #include "ufs_fs.h"
0095 #include "ufs.h"
0096 #include "swab.h"
0097 #include "util.h"
0098 
0099 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
0100 {
0101     struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
0102     struct inode *inode;
0103 
0104     if (ino < UFS_ROOTINO || ino > (u64)uspi->s_ncg * uspi->s_ipg)
0105         return ERR_PTR(-ESTALE);
0106 
0107     inode = ufs_iget(sb, ino);
0108     if (IS_ERR(inode))
0109         return ERR_CAST(inode);
0110     if (generation && inode->i_generation != generation) {
0111         iput(inode);
0112         return ERR_PTR(-ESTALE);
0113     }
0114     return inode;
0115 }
0116 
0117 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
0118                        int fh_len, int fh_type)
0119 {
0120     return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
0121 }
0122 
0123 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
0124                        int fh_len, int fh_type)
0125 {
0126     return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
0127 }
0128 
0129 static struct dentry *ufs_get_parent(struct dentry *child)
0130 {
0131     ino_t ino;
0132 
0133     ino = ufs_inode_by_name(d_inode(child), &dotdot_name);
0134     if (!ino)
0135         return ERR_PTR(-ENOENT);
0136     return d_obtain_alias(ufs_iget(child->d_sb, ino));
0137 }
0138 
0139 static const struct export_operations ufs_export_ops = {
0140     .fh_to_dentry   = ufs_fh_to_dentry,
0141     .fh_to_parent   = ufs_fh_to_parent,
0142     .get_parent = ufs_get_parent,
0143 };
0144 
0145 #ifdef CONFIG_UFS_DEBUG
0146 /*
0147  * Print contents of ufs_super_block, useful for debugging
0148  */
0149 static void ufs_print_super_stuff(struct super_block *sb,
0150                   struct ufs_super_block_first *usb1,
0151                   struct ufs_super_block_second *usb2,
0152                   struct ufs_super_block_third *usb3)
0153 {
0154     u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
0155 
0156     pr_debug("ufs_print_super_stuff\n");
0157     pr_debug("  magic:     0x%x\n", magic);
0158     if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
0159         pr_debug("  fs_size:   %llu\n", (unsigned long long)
0160              fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
0161         pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
0162              fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
0163         pr_debug("  bsize:         %u\n",
0164              fs32_to_cpu(sb, usb1->fs_bsize));
0165         pr_debug("  fsize:         %u\n",
0166              fs32_to_cpu(sb, usb1->fs_fsize));
0167         pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
0168         pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
0169              fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
0170         pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
0171              fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
0172         pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
0173              (unsigned long long)
0174              fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
0175         pr_info("  cs_nifree(Num of free inodes): %llu\n",
0176             (unsigned long long)
0177             fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
0178         pr_info("  cs_nffree(Num of free frags): %llu\n",
0179             (unsigned long long)
0180             fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
0181         pr_info("  fs_maxsymlinklen: %u\n",
0182             fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
0183     } else {
0184         pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
0185         pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
0186         pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
0187         pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
0188         pr_debug(" cgoffset:    %u\n",
0189              fs32_to_cpu(sb, usb1->fs_cgoffset));
0190         pr_debug(" ~cgmask:     0x%x\n",
0191              ~fs32_to_cpu(sb, usb1->fs_cgmask));
0192         pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
0193         pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
0194         pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
0195         pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
0196         pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
0197         pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
0198         pr_debug(" fragshift:   %u\n",
0199              fs32_to_cpu(sb, usb1->fs_fragshift));
0200         pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
0201         pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
0202         pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
0203         pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
0204         pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
0205         pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
0206         pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
0207         pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
0208         pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
0209         pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
0210         pr_debug(" fstodb:      %u\n",
0211              fs32_to_cpu(sb, usb1->fs_fsbtodb));
0212         pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
0213         pr_debug(" ndir         %u\n",
0214              fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
0215         pr_debug(" nifree       %u\n",
0216              fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
0217         pr_debug(" nbfree       %u\n",
0218              fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
0219         pr_debug(" nffree       %u\n",
0220              fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
0221     }
0222     pr_debug("\n");
0223 }
0224 
0225 /*
0226  * Print contents of ufs_cylinder_group, useful for debugging
0227  */
0228 static void ufs_print_cylinder_stuff(struct super_block *sb,
0229                      struct ufs_cylinder_group *cg)
0230 {
0231     pr_debug("\nufs_print_cylinder_stuff\n");
0232     pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
0233     pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
0234     pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
0235     pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
0236     pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
0237     pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
0238     pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
0239     pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
0240     pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
0241     pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
0242     pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
0243     pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
0244     pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
0245     pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
0246     pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
0247         fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
0248         fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
0249         fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
0250         fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
0251     pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
0252     pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
0253     pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
0254     pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
0255     pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
0256     pr_debug("  clustersumoff %u\n",
0257          fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
0258     pr_debug("  clusteroff    %u\n",
0259          fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
0260     pr_debug("  nclusterblks  %u\n",
0261          fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
0262     pr_debug("\n");
0263 }
0264 #else
0265 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
0266 #  define ufs_print_cylinder_stuff(sb, cg) /**/
0267 #endif /* CONFIG_UFS_DEBUG */
0268 
0269 static const struct super_operations ufs_super_ops;
0270 
0271 void ufs_error (struct super_block * sb, const char * function,
0272     const char * fmt, ...)
0273 {
0274     struct ufs_sb_private_info * uspi;
0275     struct ufs_super_block_first * usb1;
0276     struct va_format vaf;
0277     va_list args;
0278 
0279     uspi = UFS_SB(sb)->s_uspi;
0280     usb1 = ubh_get_usb_first(uspi);
0281     
0282     if (!sb_rdonly(sb)) {
0283         usb1->fs_clean = UFS_FSBAD;
0284         ubh_mark_buffer_dirty(USPI_UBH(uspi));
0285         ufs_mark_sb_dirty(sb);
0286         sb->s_flags |= SB_RDONLY;
0287     }
0288     va_start(args, fmt);
0289     vaf.fmt = fmt;
0290     vaf.va = &args;
0291     switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
0292     case UFS_MOUNT_ONERROR_PANIC:
0293         panic("panic (device %s): %s: %pV\n",
0294               sb->s_id, function, &vaf);
0295 
0296     case UFS_MOUNT_ONERROR_LOCK:
0297     case UFS_MOUNT_ONERROR_UMOUNT:
0298     case UFS_MOUNT_ONERROR_REPAIR:
0299         pr_crit("error (device %s): %s: %pV\n",
0300             sb->s_id, function, &vaf);
0301     }
0302     va_end(args);
0303 }
0304 
0305 void ufs_panic (struct super_block * sb, const char * function,
0306     const char * fmt, ...)
0307 {
0308     struct ufs_sb_private_info * uspi;
0309     struct ufs_super_block_first * usb1;
0310     struct va_format vaf;
0311     va_list args;
0312     
0313     uspi = UFS_SB(sb)->s_uspi;
0314     usb1 = ubh_get_usb_first(uspi);
0315     
0316     if (!sb_rdonly(sb)) {
0317         usb1->fs_clean = UFS_FSBAD;
0318         ubh_mark_buffer_dirty(USPI_UBH(uspi));
0319         ufs_mark_sb_dirty(sb);
0320     }
0321     va_start(args, fmt);
0322     vaf.fmt = fmt;
0323     vaf.va = &args;
0324     sb->s_flags |= SB_RDONLY;
0325     pr_crit("panic (device %s): %s: %pV\n",
0326         sb->s_id, function, &vaf);
0327     va_end(args);
0328 }
0329 
0330 void ufs_warning (struct super_block * sb, const char * function,
0331     const char * fmt, ...)
0332 {
0333     struct va_format vaf;
0334     va_list args;
0335 
0336     va_start(args, fmt);
0337     vaf.fmt = fmt;
0338     vaf.va = &args;
0339     pr_warn("(device %s): %s: %pV\n",
0340         sb->s_id, function, &vaf);
0341     va_end(args);
0342 }
0343 
0344 enum {
0345        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
0346        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
0347        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
0348        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
0349        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
0350        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
0351        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
0352        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
0353        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
0354        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
0355        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
0356        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
0357        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
0358        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
0359        Opt_err
0360 };
0361 
0362 static const match_table_t tokens = {
0363     {Opt_type_old, "ufstype=old"},
0364     {Opt_type_sunx86, "ufstype=sunx86"},
0365     {Opt_type_sun, "ufstype=sun"},
0366     {Opt_type_sunos, "ufstype=sunos"},
0367     {Opt_type_44bsd, "ufstype=44bsd"},
0368     {Opt_type_ufs2, "ufstype=ufs2"},
0369     {Opt_type_ufs2, "ufstype=5xbsd"},
0370     {Opt_type_hp, "ufstype=hp"},
0371     {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
0372     {Opt_type_nextstep, "ufstype=nextstep"},
0373     {Opt_type_openstep, "ufstype=openstep"},
0374 /*end of possible ufs types */
0375     {Opt_onerror_panic, "onerror=panic"},
0376     {Opt_onerror_lock, "onerror=lock"},
0377     {Opt_onerror_umount, "onerror=umount"},
0378     {Opt_onerror_repair, "onerror=repair"},
0379     {Opt_err, NULL}
0380 };
0381 
0382 static int ufs_parse_options (char * options, unsigned * mount_options)
0383 {
0384     char * p;
0385     
0386     UFSD("ENTER\n");
0387     
0388     if (!options)
0389         return 1;
0390 
0391     while ((p = strsep(&options, ",")) != NULL) {
0392         substring_t args[MAX_OPT_ARGS];
0393         int token;
0394         if (!*p)
0395             continue;
0396 
0397         token = match_token(p, tokens, args);
0398         switch (token) {
0399         case Opt_type_old:
0400             ufs_clear_opt (*mount_options, UFSTYPE);
0401             ufs_set_opt (*mount_options, UFSTYPE_OLD);
0402             break;
0403         case Opt_type_sunx86:
0404             ufs_clear_opt (*mount_options, UFSTYPE);
0405             ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
0406             break;
0407         case Opt_type_sun:
0408             ufs_clear_opt (*mount_options, UFSTYPE);
0409             ufs_set_opt (*mount_options, UFSTYPE_SUN);
0410             break;
0411         case Opt_type_sunos:
0412             ufs_clear_opt(*mount_options, UFSTYPE);
0413             ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
0414             break;
0415         case Opt_type_44bsd:
0416             ufs_clear_opt (*mount_options, UFSTYPE);
0417             ufs_set_opt (*mount_options, UFSTYPE_44BSD);
0418             break;
0419         case Opt_type_ufs2:
0420             ufs_clear_opt(*mount_options, UFSTYPE);
0421             ufs_set_opt(*mount_options, UFSTYPE_UFS2);
0422             break;
0423         case Opt_type_hp:
0424             ufs_clear_opt (*mount_options, UFSTYPE);
0425             ufs_set_opt (*mount_options, UFSTYPE_HP);
0426             break;
0427         case Opt_type_nextstepcd:
0428             ufs_clear_opt (*mount_options, UFSTYPE);
0429             ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
0430             break;
0431         case Opt_type_nextstep:
0432             ufs_clear_opt (*mount_options, UFSTYPE);
0433             ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
0434             break;
0435         case Opt_type_openstep:
0436             ufs_clear_opt (*mount_options, UFSTYPE);
0437             ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
0438             break;
0439         case Opt_onerror_panic:
0440             ufs_clear_opt (*mount_options, ONERROR);
0441             ufs_set_opt (*mount_options, ONERROR_PANIC);
0442             break;
0443         case Opt_onerror_lock:
0444             ufs_clear_opt (*mount_options, ONERROR);
0445             ufs_set_opt (*mount_options, ONERROR_LOCK);
0446             break;
0447         case Opt_onerror_umount:
0448             ufs_clear_opt (*mount_options, ONERROR);
0449             ufs_set_opt (*mount_options, ONERROR_UMOUNT);
0450             break;
0451         case Opt_onerror_repair:
0452             pr_err("Unable to do repair on error, will lock lock instead\n");
0453             ufs_clear_opt (*mount_options, ONERROR);
0454             ufs_set_opt (*mount_options, ONERROR_REPAIR);
0455             break;
0456         default:
0457             pr_err("Invalid option: \"%s\" or missing value\n", p);
0458             return 0;
0459         }
0460     }
0461     return 1;
0462 }
0463 
0464 /*
0465  * Different types of UFS hold fs_cstotal in different
0466  * places, and use different data structure for it.
0467  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
0468  */
0469 static void ufs_setup_cstotal(struct super_block *sb)
0470 {
0471     struct ufs_sb_info *sbi = UFS_SB(sb);
0472     struct ufs_sb_private_info *uspi = sbi->s_uspi;
0473     struct ufs_super_block_first *usb1;
0474     struct ufs_super_block_second *usb2;
0475     struct ufs_super_block_third *usb3;
0476     unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
0477 
0478     UFSD("ENTER, mtype=%u\n", mtype);
0479     usb1 = ubh_get_usb_first(uspi);
0480     usb2 = ubh_get_usb_second(uspi);
0481     usb3 = ubh_get_usb_third(uspi);
0482 
0483     if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
0484          (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) ||
0485         mtype == UFS_MOUNT_UFSTYPE_UFS2) {
0486         /*we have statistic in different place, then usual*/
0487         uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
0488         uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
0489         uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
0490         uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
0491     } else {
0492         uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
0493         uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
0494         uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
0495         uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
0496     }
0497     UFSD("EXIT\n");
0498 }
0499 
0500 /*
0501  * Read on-disk structures associated with cylinder groups
0502  */
0503 static int ufs_read_cylinder_structures(struct super_block *sb)
0504 {
0505     struct ufs_sb_info *sbi = UFS_SB(sb);
0506     struct ufs_sb_private_info *uspi = sbi->s_uspi;
0507     struct ufs_buffer_head * ubh;
0508     unsigned char * base, * space;
0509     unsigned size, blks, i;
0510 
0511     UFSD("ENTER\n");
0512 
0513     /*
0514      * Read cs structures from (usually) first data block
0515      * on the device. 
0516      */
0517     size = uspi->s_cssize;
0518     blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
0519     base = space = kmalloc(size, GFP_NOFS);
0520     if (!base)
0521         goto failed; 
0522     sbi->s_csp = (struct ufs_csum *)space;
0523     for (i = 0; i < blks; i += uspi->s_fpb) {
0524         size = uspi->s_bsize;
0525         if (i + uspi->s_fpb > blks)
0526             size = (blks - i) * uspi->s_fsize;
0527 
0528         ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
0529         
0530         if (!ubh)
0531             goto failed;
0532 
0533         ubh_ubhcpymem (space, ubh, size);
0534 
0535         space += size;
0536         ubh_brelse (ubh);
0537         ubh = NULL;
0538     }
0539 
0540     /*
0541      * Read cylinder group (we read only first fragment from block
0542      * at this time) and prepare internal data structures for cg caching.
0543      */
0544     sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *),
0545                    GFP_NOFS);
0546     if (!sbi->s_ucg)
0547         goto failed;
0548     for (i = 0; i < uspi->s_ncg; i++) 
0549         sbi->s_ucg[i] = NULL;
0550     for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
0551         sbi->s_ucpi[i] = NULL;
0552         sbi->s_cgno[i] = UFS_CGNO_EMPTY;
0553     }
0554     for (i = 0; i < uspi->s_ncg; i++) {
0555         UFSD("read cg %u\n", i);
0556         if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
0557             goto failed;
0558         if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
0559             goto failed;
0560 
0561         ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
0562     }
0563     for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
0564         if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
0565             goto failed;
0566         sbi->s_cgno[i] = UFS_CGNO_EMPTY;
0567     }
0568     sbi->s_cg_loaded = 0;
0569     UFSD("EXIT\n");
0570     return 1;
0571 
0572 failed:
0573     kfree (base);
0574     if (sbi->s_ucg) {
0575         for (i = 0; i < uspi->s_ncg; i++)
0576             if (sbi->s_ucg[i])
0577                 brelse (sbi->s_ucg[i]);
0578         kfree (sbi->s_ucg);
0579         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
0580             kfree (sbi->s_ucpi[i]);
0581     }
0582     UFSD("EXIT (FAILED)\n");
0583     return 0;
0584 }
0585 
0586 /*
0587  * Sync our internal copy of fs_cstotal with disk
0588  */
0589 static void ufs_put_cstotal(struct super_block *sb)
0590 {
0591     unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
0592     struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
0593     struct ufs_super_block_first *usb1;
0594     struct ufs_super_block_second *usb2;
0595     struct ufs_super_block_third *usb3;
0596 
0597     UFSD("ENTER\n");
0598     usb1 = ubh_get_usb_first(uspi);
0599     usb2 = ubh_get_usb_second(uspi);
0600     usb3 = ubh_get_usb_third(uspi);
0601 
0602     if (mtype == UFS_MOUNT_UFSTYPE_UFS2) {
0603         /*we have statistic in different place, then usual*/
0604         usb2->fs_un.fs_u2.cs_ndir =
0605             cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
0606         usb2->fs_un.fs_u2.cs_nbfree =
0607             cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
0608         usb3->fs_un1.fs_u2.cs_nifree =
0609             cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
0610         usb3->fs_un1.fs_u2.cs_nffree =
0611             cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
0612         goto out;
0613     }
0614 
0615     if (mtype == UFS_MOUNT_UFSTYPE_44BSD &&
0616          (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) {
0617         /* store stats in both old and new places */
0618         usb2->fs_un.fs_u2.cs_ndir =
0619             cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
0620         usb2->fs_un.fs_u2.cs_nbfree =
0621             cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
0622         usb3->fs_un1.fs_u2.cs_nifree =
0623             cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
0624         usb3->fs_un1.fs_u2.cs_nffree =
0625             cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
0626     }
0627     usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
0628     usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
0629     usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
0630     usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
0631 out:
0632     ubh_mark_buffer_dirty(USPI_UBH(uspi));
0633     ufs_print_super_stuff(sb, usb1, usb2, usb3);
0634     UFSD("EXIT\n");
0635 }
0636 
0637 /**
0638  * ufs_put_super_internal() - put on-disk intrenal structures
0639  * @sb: pointer to super_block structure
0640  * Put on-disk structures associated with cylinder groups
0641  * and write them back to disk, also update cs_total on disk
0642  */
0643 static void ufs_put_super_internal(struct super_block *sb)
0644 {
0645     struct ufs_sb_info *sbi = UFS_SB(sb);
0646     struct ufs_sb_private_info *uspi = sbi->s_uspi;
0647     struct ufs_buffer_head * ubh;
0648     unsigned char * base, * space;
0649     unsigned blks, size, i;
0650 
0651     
0652     UFSD("ENTER\n");
0653 
0654     ufs_put_cstotal(sb);
0655     size = uspi->s_cssize;
0656     blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
0657     base = space = (char*) sbi->s_csp;
0658     for (i = 0; i < blks; i += uspi->s_fpb) {
0659         size = uspi->s_bsize;
0660         if (i + uspi->s_fpb > blks)
0661             size = (blks - i) * uspi->s_fsize;
0662 
0663         ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
0664 
0665         ubh_memcpyubh (ubh, space, size);
0666         space += size;
0667         ubh_mark_buffer_uptodate (ubh, 1);
0668         ubh_mark_buffer_dirty (ubh);
0669         ubh_brelse (ubh);
0670     }
0671     for (i = 0; i < sbi->s_cg_loaded; i++) {
0672         ufs_put_cylinder (sb, i);
0673         kfree (sbi->s_ucpi[i]);
0674     }
0675     for (; i < UFS_MAX_GROUP_LOADED; i++) 
0676         kfree (sbi->s_ucpi[i]);
0677     for (i = 0; i < uspi->s_ncg; i++) 
0678         brelse (sbi->s_ucg[i]);
0679     kfree (sbi->s_ucg);
0680     kfree (base);
0681 
0682     UFSD("EXIT\n");
0683 }
0684 
0685 static int ufs_sync_fs(struct super_block *sb, int wait)
0686 {
0687     struct ufs_sb_private_info * uspi;
0688     struct ufs_super_block_first * usb1;
0689     struct ufs_super_block_third * usb3;
0690     unsigned flags;
0691 
0692     mutex_lock(&UFS_SB(sb)->s_lock);
0693 
0694     UFSD("ENTER\n");
0695 
0696     flags = UFS_SB(sb)->s_flags;
0697     uspi = UFS_SB(sb)->s_uspi;
0698     usb1 = ubh_get_usb_first(uspi);
0699     usb3 = ubh_get_usb_third(uspi);
0700 
0701     usb1->fs_time = ufs_get_seconds(sb);
0702     if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
0703         (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
0704         (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
0705         ufs_set_fs_state(sb, usb1, usb3,
0706                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
0707     ufs_put_cstotal(sb);
0708 
0709     UFSD("EXIT\n");
0710     mutex_unlock(&UFS_SB(sb)->s_lock);
0711 
0712     return 0;
0713 }
0714 
0715 static void delayed_sync_fs(struct work_struct *work)
0716 {
0717     struct ufs_sb_info *sbi;
0718 
0719     sbi = container_of(work, struct ufs_sb_info, sync_work.work);
0720 
0721     spin_lock(&sbi->work_lock);
0722     sbi->work_queued = 0;
0723     spin_unlock(&sbi->work_lock);
0724 
0725     ufs_sync_fs(sbi->sb, 1);
0726 }
0727 
0728 void ufs_mark_sb_dirty(struct super_block *sb)
0729 {
0730     struct ufs_sb_info *sbi = UFS_SB(sb);
0731     unsigned long delay;
0732 
0733     spin_lock(&sbi->work_lock);
0734     if (!sbi->work_queued) {
0735         delay = msecs_to_jiffies(dirty_writeback_interval * 10);
0736         queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
0737         sbi->work_queued = 1;
0738     }
0739     spin_unlock(&sbi->work_lock);
0740 }
0741 
0742 static void ufs_put_super(struct super_block *sb)
0743 {
0744     struct ufs_sb_info * sbi = UFS_SB(sb);
0745 
0746     UFSD("ENTER\n");
0747 
0748     if (!sb_rdonly(sb))
0749         ufs_put_super_internal(sb);
0750     cancel_delayed_work_sync(&sbi->sync_work);
0751 
0752     ubh_brelse_uspi (sbi->s_uspi);
0753     kfree (sbi->s_uspi);
0754     kfree (sbi);
0755     sb->s_fs_info = NULL;
0756     UFSD("EXIT\n");
0757     return;
0758 }
0759 
0760 static u64 ufs_max_bytes(struct super_block *sb)
0761 {
0762     struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
0763     int bits = uspi->s_apbshift;
0764     u64 res;
0765 
0766     if (bits > 21)
0767         res = ~0ULL;
0768     else
0769         res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
0770             (1LL << (3*bits));
0771 
0772     if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
0773         return MAX_LFS_FILESIZE;
0774     return res << uspi->s_bshift;
0775 }
0776 
0777 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
0778 {
0779     struct ufs_sb_info * sbi;
0780     struct ufs_sb_private_info * uspi;
0781     struct ufs_super_block_first * usb1;
0782     struct ufs_super_block_second * usb2;
0783     struct ufs_super_block_third * usb3;
0784     struct ufs_buffer_head * ubh;   
0785     struct inode *inode;
0786     unsigned block_size, super_block_size;
0787     unsigned flags;
0788     unsigned super_block_offset;
0789     unsigned maxsymlen;
0790     int ret = -EINVAL;
0791 
0792     uspi = NULL;
0793     ubh = NULL;
0794     flags = 0;
0795     
0796     UFSD("ENTER\n");
0797 
0798 #ifndef CONFIG_UFS_FS_WRITE
0799     if (!sb_rdonly(sb)) {
0800         pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
0801         return -EROFS;
0802     }
0803 #endif
0804         
0805     sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
0806     if (!sbi)
0807         goto failed_nomem;
0808     sb->s_fs_info = sbi;
0809     sbi->sb = sb;
0810 
0811     UFSD("flag %u\n", (int)(sb_rdonly(sb)));
0812     
0813     mutex_init(&sbi->s_lock);
0814     spin_lock_init(&sbi->work_lock);
0815     INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
0816     /*
0817      * Set default mount options
0818      * Parse mount options
0819      */
0820     sbi->s_mount_opt = 0;
0821     ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
0822     if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
0823         pr_err("wrong mount options\n");
0824         goto failed;
0825     }
0826     if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
0827         if (!silent)
0828             pr_err("You didn't specify the type of your ufs filesystem\n\n"
0829             "mount -t ufs -o ufstype="
0830             "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
0831             ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
0832             "default is ufstype=old\n");
0833         ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
0834     }
0835 
0836     uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
0837     sbi->s_uspi = uspi;
0838     if (!uspi)
0839         goto failed;
0840     uspi->s_dirblksize = UFS_SECTOR_SIZE;
0841     super_block_offset=UFS_SBLOCK;
0842 
0843     sb->s_maxbytes = MAX_LFS_FILESIZE;
0844 
0845     sb->s_time_gran = NSEC_PER_SEC;
0846     sb->s_time_min = S32_MIN;
0847     sb->s_time_max = S32_MAX;
0848 
0849     switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
0850     case UFS_MOUNT_UFSTYPE_44BSD:
0851         UFSD("ufstype=44bsd\n");
0852         uspi->s_fsize = block_size = 512;
0853         uspi->s_fmask = ~(512 - 1);
0854         uspi->s_fshift = 9;
0855         uspi->s_sbsize = super_block_size = 1536;
0856         uspi->s_sbbase = 0;
0857         flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
0858         break;
0859     case UFS_MOUNT_UFSTYPE_UFS2:
0860         UFSD("ufstype=ufs2\n");
0861         super_block_offset=SBLOCK_UFS2;
0862         uspi->s_fsize = block_size = 512;
0863         uspi->s_fmask = ~(512 - 1);
0864         uspi->s_fshift = 9;
0865         uspi->s_sbsize = super_block_size = 1536;
0866         uspi->s_sbbase =  0;
0867         sb->s_time_gran = 1;
0868         sb->s_time_min = S64_MIN;
0869         sb->s_time_max = S64_MAX;
0870         flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
0871         break;
0872         
0873     case UFS_MOUNT_UFSTYPE_SUN:
0874         UFSD("ufstype=sun\n");
0875         uspi->s_fsize = block_size = 1024;
0876         uspi->s_fmask = ~(1024 - 1);
0877         uspi->s_fshift = 10;
0878         uspi->s_sbsize = super_block_size = 2048;
0879         uspi->s_sbbase = 0;
0880         uspi->s_maxsymlinklen = 0; /* Not supported on disk */
0881         flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
0882         break;
0883 
0884     case UFS_MOUNT_UFSTYPE_SUNOS:
0885         UFSD("ufstype=sunos\n");
0886         uspi->s_fsize = block_size = 1024;
0887         uspi->s_fmask = ~(1024 - 1);
0888         uspi->s_fshift = 10;
0889         uspi->s_sbsize = 2048;
0890         super_block_size = 2048;
0891         uspi->s_sbbase = 0;
0892         uspi->s_maxsymlinklen = 0; /* Not supported on disk */
0893         flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
0894         break;
0895 
0896     case UFS_MOUNT_UFSTYPE_SUNx86:
0897         UFSD("ufstype=sunx86\n");
0898         uspi->s_fsize = block_size = 1024;
0899         uspi->s_fmask = ~(1024 - 1);
0900         uspi->s_fshift = 10;
0901         uspi->s_sbsize = super_block_size = 2048;
0902         uspi->s_sbbase = 0;
0903         uspi->s_maxsymlinklen = 0; /* Not supported on disk */
0904         flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
0905         break;
0906 
0907     case UFS_MOUNT_UFSTYPE_OLD:
0908         UFSD("ufstype=old\n");
0909         uspi->s_fsize = block_size = 1024;
0910         uspi->s_fmask = ~(1024 - 1);
0911         uspi->s_fshift = 10;
0912         uspi->s_sbsize = super_block_size = 2048;
0913         uspi->s_sbbase = 0;
0914         flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
0915         if (!sb_rdonly(sb)) {
0916             if (!silent)
0917                 pr_info("ufstype=old is supported read-only\n");
0918             sb->s_flags |= SB_RDONLY;
0919         }
0920         break;
0921     
0922     case UFS_MOUNT_UFSTYPE_NEXTSTEP:
0923         UFSD("ufstype=nextstep\n");
0924         uspi->s_fsize = block_size = 1024;
0925         uspi->s_fmask = ~(1024 - 1);
0926         uspi->s_fshift = 10;
0927         uspi->s_sbsize = super_block_size = 2048;
0928         uspi->s_sbbase = 0;
0929         uspi->s_dirblksize = 1024;
0930         flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
0931         if (!sb_rdonly(sb)) {
0932             if (!silent)
0933                 pr_info("ufstype=nextstep is supported read-only\n");
0934             sb->s_flags |= SB_RDONLY;
0935         }
0936         break;
0937     
0938     case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
0939         UFSD("ufstype=nextstep-cd\n");
0940         uspi->s_fsize = block_size = 2048;
0941         uspi->s_fmask = ~(2048 - 1);
0942         uspi->s_fshift = 11;
0943         uspi->s_sbsize = super_block_size = 2048;
0944         uspi->s_sbbase = 0;
0945         uspi->s_dirblksize = 1024;
0946         flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
0947         if (!sb_rdonly(sb)) {
0948             if (!silent)
0949                 pr_info("ufstype=nextstep-cd is supported read-only\n");
0950             sb->s_flags |= SB_RDONLY;
0951         }
0952         break;
0953     
0954     case UFS_MOUNT_UFSTYPE_OPENSTEP:
0955         UFSD("ufstype=openstep\n");
0956         uspi->s_fsize = block_size = 1024;
0957         uspi->s_fmask = ~(1024 - 1);
0958         uspi->s_fshift = 10;
0959         uspi->s_sbsize = super_block_size = 2048;
0960         uspi->s_sbbase = 0;
0961         uspi->s_dirblksize = 1024;
0962         flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
0963         if (!sb_rdonly(sb)) {
0964             if (!silent)
0965                 pr_info("ufstype=openstep is supported read-only\n");
0966             sb->s_flags |= SB_RDONLY;
0967         }
0968         break;
0969     
0970     case UFS_MOUNT_UFSTYPE_HP:
0971         UFSD("ufstype=hp\n");
0972         uspi->s_fsize = block_size = 1024;
0973         uspi->s_fmask = ~(1024 - 1);
0974         uspi->s_fshift = 10;
0975         uspi->s_sbsize = super_block_size = 2048;
0976         uspi->s_sbbase = 0;
0977         flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
0978         if (!sb_rdonly(sb)) {
0979             if (!silent)
0980                 pr_info("ufstype=hp is supported read-only\n");
0981             sb->s_flags |= SB_RDONLY;
0982         }
0983         break;
0984     default:
0985         if (!silent)
0986             pr_err("unknown ufstype\n");
0987         goto failed;
0988     }
0989     
0990 again:  
0991     if (!sb_set_blocksize(sb, block_size)) {
0992         pr_err("failed to set blocksize\n");
0993         goto failed;
0994     }
0995 
0996     /*
0997      * read ufs super block from device
0998      */
0999 
1000     ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
1001     
1002     if (!ubh) 
1003             goto failed;
1004 
1005     usb1 = ubh_get_usb_first(uspi);
1006     usb2 = ubh_get_usb_second(uspi);
1007     usb3 = ubh_get_usb_third(uspi);
1008 
1009     /* Sort out mod used on SunOS 4.1.3 for fs_state */
1010     uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1011     if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1012         (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1013         flags &= ~UFS_ST_MASK;
1014         flags |=  UFS_ST_SUN;
1015     }
1016 
1017     if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1018         uspi->s_postblformat == UFS_42POSTBLFMT) {
1019         if (!silent)
1020             pr_err("this is not a 44bsd filesystem");
1021         goto failed;
1022     }
1023 
1024     /*
1025      * Check ufs magic number
1026      */
1027     sbi->s_bytesex = BYTESEX_LE;
1028     switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1029         case UFS_MAGIC:
1030         case UFS_MAGIC_BW:
1031         case UFS2_MAGIC:
1032         case UFS_MAGIC_LFN:
1033             case UFS_MAGIC_FEA:
1034             case UFS_MAGIC_4GB:
1035             goto magic_found;
1036     }
1037     sbi->s_bytesex = BYTESEX_BE;
1038     switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1039         case UFS_MAGIC:
1040         case UFS_MAGIC_BW:
1041         case UFS2_MAGIC:
1042         case UFS_MAGIC_LFN:
1043             case UFS_MAGIC_FEA:
1044             case UFS_MAGIC_4GB:
1045             goto magic_found;
1046     }
1047 
1048     if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
1049       || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
1050       || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
1051       && uspi->s_sbbase < 256) {
1052         ubh_brelse_uspi(uspi);
1053         ubh = NULL;
1054         uspi->s_sbbase += 8;
1055         goto again;
1056     }
1057     if (!silent)
1058         pr_err("%s(): bad magic number\n", __func__);
1059     goto failed;
1060 
1061 magic_found:
1062     /*
1063      * Check block and fragment sizes
1064      */
1065     uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1066     uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1067     uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1068     uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1069     uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1070 
1071     if (!is_power_of_2(uspi->s_fsize)) {
1072         pr_err("%s(): fragment size %u is not a power of 2\n",
1073                __func__, uspi->s_fsize);
1074         goto failed;
1075     }
1076     if (uspi->s_fsize < 512) {
1077         pr_err("%s(): fragment size %u is too small\n",
1078                __func__, uspi->s_fsize);
1079         goto failed;
1080     }
1081     if (uspi->s_fsize > 4096) {
1082         pr_err("%s(): fragment size %u is too large\n",
1083                __func__, uspi->s_fsize);
1084         goto failed;
1085     }
1086     if (!is_power_of_2(uspi->s_bsize)) {
1087         pr_err("%s(): block size %u is not a power of 2\n",
1088                __func__, uspi->s_bsize);
1089         goto failed;
1090     }
1091     if (uspi->s_bsize < 4096) {
1092         pr_err("%s(): block size %u is too small\n",
1093                __func__, uspi->s_bsize);
1094         goto failed;
1095     }
1096     if (uspi->s_bsize / uspi->s_fsize > 8) {
1097         pr_err("%s(): too many fragments per block (%u)\n",
1098                __func__, uspi->s_bsize / uspi->s_fsize);
1099         goto failed;
1100     }
1101     if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1102         ubh_brelse_uspi(uspi);
1103         ubh = NULL;
1104         block_size = uspi->s_fsize;
1105         super_block_size = uspi->s_sbsize;
1106         UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1107         goto again;
1108     }
1109 
1110     sbi->s_flags = flags;/*after that line some functions use s_flags*/
1111     ufs_print_super_stuff(sb, usb1, usb2, usb3);
1112 
1113     /*
1114      * Check, if file system was correctly unmounted.
1115      * If not, make it read only.
1116      */
1117     if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1118       ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1119       (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1120         (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1121       (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1122       (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1123         switch(usb1->fs_clean) {
1124         case UFS_FSCLEAN:
1125             UFSD("fs is clean\n");
1126             break;
1127         case UFS_FSSTABLE:
1128             UFSD("fs is stable\n");
1129             break;
1130         case UFS_FSLOG:
1131             UFSD("fs is logging fs\n");
1132             break;
1133         case UFS_FSOSF1:
1134             UFSD("fs is DEC OSF/1\n");
1135             break;
1136         case UFS_FSACTIVE:
1137             pr_err("%s(): fs is active\n", __func__);
1138             sb->s_flags |= SB_RDONLY;
1139             break;
1140         case UFS_FSBAD:
1141             pr_err("%s(): fs is bad\n", __func__);
1142             sb->s_flags |= SB_RDONLY;
1143             break;
1144         default:
1145             pr_err("%s(): can't grok fs_clean 0x%x\n",
1146                    __func__, usb1->fs_clean);
1147             sb->s_flags |= SB_RDONLY;
1148             break;
1149         }
1150     } else {
1151         pr_err("%s(): fs needs fsck\n", __func__);
1152         sb->s_flags |= SB_RDONLY;
1153     }
1154 
1155     /*
1156      * Read ufs_super_block into internal data structures
1157      */
1158     sb->s_op = &ufs_super_ops;
1159     sb->s_export_op = &ufs_export_ops;
1160 
1161     sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1162 
1163     uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1164     uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1165     uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1166     uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1167     uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1168     uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1169 
1170     if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1171         uspi->s_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1172         uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1173     } else {
1174         uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1175         uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1176     }
1177 
1178     uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1179     /* s_bsize already set */
1180     /* s_fsize already set */
1181     uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1182     uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1183     uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1184     uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1185     uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1186     uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1187     UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1188         uspi->s_fshift);
1189     uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1190     uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1191     /* s_sbsize already set */
1192     uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1193     uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1194     uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1195     uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1196     uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1197     uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1198     uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1199     uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1200 
1201     if (uspi->fs_magic == UFS2_MAGIC)
1202         uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1203     else
1204         uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1205 
1206     uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1207     uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1208     uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1209     uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1210     uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1211     uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1212     uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1213     uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1214     uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1215     uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1216     uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1217     uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1218     uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1219     uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1220 
1221     uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1222                           uspi->s_minfree, 100);
1223     if (uspi->s_minfree <= 5) {
1224         uspi->s_time_to_space = ~0ULL;
1225         uspi->s_space_to_time = 0;
1226         usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1227     } else {
1228         uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1229         uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1230                           uspi->s_minfree - 2, 100) - 1;
1231     }
1232 
1233     /*
1234      * Compute another frequently used values
1235      */
1236     uspi->s_fpbmask = uspi->s_fpb - 1;
1237     if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1238         uspi->s_apbshift = uspi->s_bshift - 3;
1239     else
1240         uspi->s_apbshift = uspi->s_bshift - 2;
1241 
1242     uspi->s_2apbshift = uspi->s_apbshift * 2;
1243     uspi->s_3apbshift = uspi->s_apbshift * 3;
1244     uspi->s_apb = 1 << uspi->s_apbshift;
1245     uspi->s_2apb = 1 << uspi->s_2apbshift;
1246     uspi->s_3apb = 1 << uspi->s_3apbshift;
1247     uspi->s_apbmask = uspi->s_apb - 1;
1248     uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1249     uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1250     uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1251     uspi->s_bpf = uspi->s_fsize << 3;
1252     uspi->s_bpfshift = uspi->s_fshift + 3;
1253     uspi->s_bpfmask = uspi->s_bpf - 1;
1254     if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1255         (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1256         uspi->s_maxsymlinklen =
1257             fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1258 
1259     if (uspi->fs_magic == UFS2_MAGIC)
1260         maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1261     else
1262         maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1263     if (uspi->s_maxsymlinklen > maxsymlen) {
1264         ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1265                 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1266         uspi->s_maxsymlinklen = maxsymlen;
1267     }
1268     sb->s_maxbytes = ufs_max_bytes(sb);
1269     sb->s_max_links = UFS_LINK_MAX;
1270 
1271     inode = ufs_iget(sb, UFS_ROOTINO);
1272     if (IS_ERR(inode)) {
1273         ret = PTR_ERR(inode);
1274         goto failed;
1275     }
1276     sb->s_root = d_make_root(inode);
1277     if (!sb->s_root) {
1278         ret = -ENOMEM;
1279         goto failed;
1280     }
1281 
1282     ufs_setup_cstotal(sb);
1283     /*
1284      * Read cylinder group structures
1285      */
1286     if (!sb_rdonly(sb))
1287         if (!ufs_read_cylinder_structures(sb))
1288             goto failed;
1289 
1290     UFSD("EXIT\n");
1291     return 0;
1292 
1293 failed:
1294     if (ubh)
1295         ubh_brelse_uspi (uspi);
1296     kfree (uspi);
1297     kfree(sbi);
1298     sb->s_fs_info = NULL;
1299     UFSD("EXIT (FAILED)\n");
1300     return ret;
1301 
1302 failed_nomem:
1303     UFSD("EXIT (NOMEM)\n");
1304     return -ENOMEM;
1305 }
1306 
1307 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1308 {
1309     struct ufs_sb_private_info * uspi;
1310     struct ufs_super_block_first * usb1;
1311     struct ufs_super_block_third * usb3;
1312     unsigned new_mount_opt, ufstype;
1313     unsigned flags;
1314 
1315     sync_filesystem(sb);
1316     mutex_lock(&UFS_SB(sb)->s_lock);
1317     uspi = UFS_SB(sb)->s_uspi;
1318     flags = UFS_SB(sb)->s_flags;
1319     usb1 = ubh_get_usb_first(uspi);
1320     usb3 = ubh_get_usb_third(uspi);
1321     
1322     /*
1323      * Allow the "check" option to be passed as a remount option.
1324      * It is not possible to change ufstype option during remount
1325      */
1326     ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1327     new_mount_opt = 0;
1328     ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1329     if (!ufs_parse_options (data, &new_mount_opt)) {
1330         mutex_unlock(&UFS_SB(sb)->s_lock);
1331         return -EINVAL;
1332     }
1333     if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1334         new_mount_opt |= ufstype;
1335     } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1336         pr_err("ufstype can't be changed during remount\n");
1337         mutex_unlock(&UFS_SB(sb)->s_lock);
1338         return -EINVAL;
1339     }
1340 
1341     if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) {
1342         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1343         mutex_unlock(&UFS_SB(sb)->s_lock);
1344         return 0;
1345     }
1346     
1347     /*
1348      * fs was mouted as rw, remounting ro
1349      */
1350     if (*mount_flags & SB_RDONLY) {
1351         ufs_put_super_internal(sb);
1352         usb1->fs_time = ufs_get_seconds(sb);
1353         if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1354           || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1355           || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1356             ufs_set_fs_state(sb, usb1, usb3,
1357                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1358         ubh_mark_buffer_dirty (USPI_UBH(uspi));
1359         sb->s_flags |= SB_RDONLY;
1360     } else {
1361     /*
1362      * fs was mounted as ro, remounting rw
1363      */
1364 #ifndef CONFIG_UFS_FS_WRITE
1365         pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1366         mutex_unlock(&UFS_SB(sb)->s_lock);
1367         return -EINVAL;
1368 #else
1369         if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1370             ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1371             ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1372             ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1373             ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1374             pr_err("this ufstype is read-only supported\n");
1375             mutex_unlock(&UFS_SB(sb)->s_lock);
1376             return -EINVAL;
1377         }
1378         if (!ufs_read_cylinder_structures(sb)) {
1379             pr_err("failed during remounting\n");
1380             mutex_unlock(&UFS_SB(sb)->s_lock);
1381             return -EPERM;
1382         }
1383         sb->s_flags &= ~SB_RDONLY;
1384 #endif
1385     }
1386     UFS_SB(sb)->s_mount_opt = new_mount_opt;
1387     mutex_unlock(&UFS_SB(sb)->s_lock);
1388     return 0;
1389 }
1390 
1391 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1392 {
1393     struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1394     unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1395     const struct match_token *tp = tokens;
1396 
1397     while (tp->token != Opt_onerror_panic && tp->token != mval)
1398         ++tp;
1399     BUG_ON(tp->token == Opt_onerror_panic);
1400     seq_printf(seq, ",%s", tp->pattern);
1401 
1402     mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1403     while (tp->token != Opt_err && tp->token != mval)
1404         ++tp;
1405     BUG_ON(tp->token == Opt_err);
1406     seq_printf(seq, ",%s", tp->pattern);
1407 
1408     return 0;
1409 }
1410 
1411 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1412 {
1413     struct super_block *sb = dentry->d_sb;
1414     struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1415     unsigned  flags = UFS_SB(sb)->s_flags;
1416     u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1417 
1418     mutex_lock(&UFS_SB(sb)->s_lock);
1419     
1420     if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1421         buf->f_type = UFS2_MAGIC;
1422     else
1423         buf->f_type = UFS_MAGIC;
1424 
1425     buf->f_blocks = uspi->s_dsize;
1426     buf->f_bfree = ufs_freefrags(uspi);
1427     buf->f_ffree = uspi->cs_total.cs_nifree;
1428     buf->f_bsize = sb->s_blocksize;
1429     buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1430         ? (buf->f_bfree - uspi->s_root_blocks) : 0;
1431     buf->f_files = uspi->s_ncg * uspi->s_ipg;
1432     buf->f_namelen = UFS_MAXNAMLEN;
1433     buf->f_fsid = u64_to_fsid(id);
1434 
1435     mutex_unlock(&UFS_SB(sb)->s_lock);
1436 
1437     return 0;
1438 }
1439 
1440 static struct kmem_cache * ufs_inode_cachep;
1441 
1442 static struct inode *ufs_alloc_inode(struct super_block *sb)
1443 {
1444     struct ufs_inode_info *ei;
1445 
1446     ei = alloc_inode_sb(sb, ufs_inode_cachep, GFP_NOFS);
1447     if (!ei)
1448         return NULL;
1449 
1450     inode_set_iversion(&ei->vfs_inode, 1);
1451     seqlock_init(&ei->meta_lock);
1452     mutex_init(&ei->truncate_mutex);
1453     return &ei->vfs_inode;
1454 }
1455 
1456 static void ufs_free_in_core_inode(struct inode *inode)
1457 {
1458     kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1459 }
1460 
1461 static void init_once(void *foo)
1462 {
1463     struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1464 
1465     inode_init_once(&ei->vfs_inode);
1466 }
1467 
1468 static int __init init_inodecache(void)
1469 {
1470     ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
1471                 sizeof(struct ufs_inode_info), 0,
1472                 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
1473                     SLAB_ACCOUNT),
1474                 offsetof(struct ufs_inode_info, i_u1.i_symlink),
1475                 sizeof_field(struct ufs_inode_info,
1476                     i_u1.i_symlink),
1477                 init_once);
1478     if (ufs_inode_cachep == NULL)
1479         return -ENOMEM;
1480     return 0;
1481 }
1482 
1483 static void destroy_inodecache(void)
1484 {
1485     /*
1486      * Make sure all delayed rcu free inodes are flushed before we
1487      * destroy cache.
1488      */
1489     rcu_barrier();
1490     kmem_cache_destroy(ufs_inode_cachep);
1491 }
1492 
1493 static const struct super_operations ufs_super_ops = {
1494     .alloc_inode    = ufs_alloc_inode,
1495     .free_inode = ufs_free_in_core_inode,
1496     .write_inode    = ufs_write_inode,
1497     .evict_inode    = ufs_evict_inode,
1498     .put_super  = ufs_put_super,
1499     .sync_fs    = ufs_sync_fs,
1500     .statfs     = ufs_statfs,
1501     .remount_fs = ufs_remount,
1502     .show_options   = ufs_show_options,
1503 };
1504 
1505 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1506     int flags, const char *dev_name, void *data)
1507 {
1508     return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1509 }
1510 
1511 static struct file_system_type ufs_fs_type = {
1512     .owner      = THIS_MODULE,
1513     .name       = "ufs",
1514     .mount      = ufs_mount,
1515     .kill_sb    = kill_block_super,
1516     .fs_flags   = FS_REQUIRES_DEV,
1517 };
1518 MODULE_ALIAS_FS("ufs");
1519 
1520 static int __init init_ufs_fs(void)
1521 {
1522     int err = init_inodecache();
1523     if (err)
1524         goto out1;
1525     err = register_filesystem(&ufs_fs_type);
1526     if (err)
1527         goto out;
1528     return 0;
1529 out:
1530     destroy_inodecache();
1531 out1:
1532     return err;
1533 }
1534 
1535 static void __exit exit_ufs_fs(void)
1536 {
1537     unregister_filesystem(&ufs_fs_type);
1538     destroy_inodecache();
1539 }
1540 
1541 module_init(init_ufs_fs)
1542 module_exit(exit_ufs_fs)
1543 MODULE_LICENSE("GPL");