linux/fs/ufs/super.c
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   1/*
   2 *  linux/fs/ufs/super.c
   3 *
   4 * Copyright (C) 1998
   5 * Daniel Pirkl <daniel.pirkl@email.cz>
   6 * Charles University, Faculty of Mathematics and Physics
   7 */
   8
   9/* Derived from
  10 *
  11 *  linux/fs/ext2/super.c
  12 *
  13 * Copyright (C) 1992, 1993, 1994, 1995
  14 * Remy Card (card@masi.ibp.fr)
  15 * Laboratoire MASI - Institut Blaise Pascal
  16 * Universite Pierre et Marie Curie (Paris VI)
  17 *
  18 *  from
  19 *
  20 *  linux/fs/minix/inode.c
  21 *
  22 *  Copyright (C) 1991, 1992  Linus Torvalds
  23 *
  24 *  Big-endian to little-endian byte-swapping/bitmaps by
  25 *        David S. Miller (davem@caip.rutgers.edu), 1995
  26 */
  27 
  28/*
  29 * Inspired by
  30 *
  31 *  linux/fs/ufs/super.c
  32 *
  33 * Copyright (C) 1996
  34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35 * Laboratory for Computer Science Research Computing Facility
  36 * Rutgers, The State University of New Jersey
  37 *
  38 * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39 *
  40 * Kernel module support added on 96/04/26 by
  41 * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42 *
  43 * Module usage counts added on 96/04/29 by
  44 * Gertjan van Wingerde <gwingerde@gmail.com>
  45 *
  46 * Clean swab support on 19970406 by
  47 * Francois-Rene Rideau <fare@tunes.org>
  48 *
  49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52 *
  53 * NeXTstep support added on February 5th 1998 by
  54 * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55 *
  56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57 * 
  58 * HP/UX hfs filesystem support added by
  59 * Martin K. Petersen <mkp@mkp.net>, August 1999
  60 *
  61 * UFS2 (of FreeBSD 5.x) support added by
  62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63 *
  64 * UFS2 write support added by
  65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  66 */
  67
  68
  69#include <linux/exportfs.h>
  70#include <linux/module.h>
  71#include <linux/bitops.h>
  72
  73#include <stdarg.h>
  74
  75#include <asm/uaccess.h>
  76
  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/init.h>
  85#include <linux/parser.h>
  86#include <linux/buffer_head.h>
  87#include <linux/vfs.h>
  88#include <linux/log2.h>
  89#include <linux/mount.h>
  90#include <linux/seq_file.h>
  91
  92#include "ufs_fs.h"
  93#include "ufs.h"
  94#include "swab.h"
  95#include "util.h"
  96
  97void lock_ufs(struct super_block *sb)
  98{
  99#if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
 100        struct ufs_sb_info *sbi = UFS_SB(sb);
 101
 102        mutex_lock(&sbi->mutex);
 103        sbi->mutex_owner = current;
 104#endif
 105}
 106
 107void unlock_ufs(struct super_block *sb)
 108{
 109#if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
 110        struct ufs_sb_info *sbi = UFS_SB(sb);
 111
 112        sbi->mutex_owner = NULL;
 113        mutex_unlock(&sbi->mutex);
 114#endif
 115}
 116
 117static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 118{
 119        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 120        struct inode *inode;
 121
 122        if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 123                return ERR_PTR(-ESTALE);
 124
 125        inode = ufs_iget(sb, ino);
 126        if (IS_ERR(inode))
 127                return ERR_CAST(inode);
 128        if (generation && inode->i_generation != generation) {
 129                iput(inode);
 130                return ERR_PTR(-ESTALE);
 131        }
 132        return inode;
 133}
 134
 135static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 136                                       int fh_len, int fh_type)
 137{
 138        return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 139}
 140
 141static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 142                                       int fh_len, int fh_type)
 143{
 144        return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 145}
 146
 147static struct dentry *ufs_get_parent(struct dentry *child)
 148{
 149        struct qstr dot_dot = QSTR_INIT("..", 2);
 150        ino_t ino;
 151
 152        ino = ufs_inode_by_name(child->d_inode, &dot_dot);
 153        if (!ino)
 154                return ERR_PTR(-ENOENT);
 155        return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
 156}
 157
 158static const struct export_operations ufs_export_ops = {
 159        .fh_to_dentry   = ufs_fh_to_dentry,
 160        .fh_to_parent   = ufs_fh_to_parent,
 161        .get_parent     = ufs_get_parent,
 162};
 163
 164#ifdef CONFIG_UFS_DEBUG
 165/*
 166 * Print contents of ufs_super_block, useful for debugging
 167 */
 168static void ufs_print_super_stuff(struct super_block *sb,
 169                                  struct ufs_super_block_first *usb1,
 170                                  struct ufs_super_block_second *usb2,
 171                                  struct ufs_super_block_third *usb3)
 172{
 173        u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 174
 175        printk("ufs_print_super_stuff\n");
 176        printk("  magic:     0x%x\n", magic);
 177        if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 178                printk("  fs_size:   %llu\n", (unsigned long long)
 179                       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 180                printk("  fs_dsize:  %llu\n", (unsigned long long)
 181                       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 182                printk("  bsize:         %u\n",
 183                       fs32_to_cpu(sb, usb1->fs_bsize));
 184                printk("  fsize:         %u\n",
 185                       fs32_to_cpu(sb, usb1->fs_fsize));
 186                printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 187                printk("  fs_sblockloc: %llu\n", (unsigned long long)
 188                       fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 189                printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 190                       fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 191                printk("  cs_nbfree(No of free blocks):  %llu\n",
 192                       (unsigned long long)
 193                       fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 194                printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 195                       (unsigned long long)
 196                       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 197                printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 198                       (unsigned long long)
 199                       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 200                printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
 201                       fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 202        } else {
 203                printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 204                printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 205                printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 206                printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 207                printk(" cgoffset:    %u\n",
 208                       fs32_to_cpu(sb, usb1->fs_cgoffset));
 209                printk(" ~cgmask:     0x%x\n",
 210                       ~fs32_to_cpu(sb, usb1->fs_cgmask));
 211                printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 212                printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 213                printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 214                printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 215                printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 216                printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 217                printk(" fragshift:   %u\n",
 218                       fs32_to_cpu(sb, usb1->fs_fragshift));
 219                printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 220                printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 221                printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 222                printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 223                printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 224                printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 225                printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 226                printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 227                printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 228                printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 229                printk(" fstodb:      %u\n",
 230                       fs32_to_cpu(sb, usb1->fs_fsbtodb));
 231                printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 232                printk(" ndir         %u\n",
 233                       fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 234                printk(" nifree       %u\n",
 235                       fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 236                printk(" nbfree       %u\n",
 237                       fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 238                printk(" nffree       %u\n",
 239                       fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 240        }
 241        printk("\n");
 242}
 243
 244/*
 245 * Print contents of ufs_cylinder_group, useful for debugging
 246 */
 247static void ufs_print_cylinder_stuff(struct super_block *sb,
 248                                     struct ufs_cylinder_group *cg)
 249{
 250        printk("\nufs_print_cylinder_stuff\n");
 251        printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 252        printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 253        printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 254        printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 255        printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 256        printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 257        printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 258        printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 259        printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 260        printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 261        printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 262        printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 263        printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 264        printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 265        printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 266            fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 267            fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 268            fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 269            fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 270        printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 271        printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 272        printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 273        printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 274        printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 275        printk("  clustersumoff %u\n",
 276               fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 277        printk("  clusteroff    %u\n",
 278               fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 279        printk("  nclusterblks  %u\n",
 280               fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 281        printk("\n");
 282}
 283#else
 284#  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 285#  define ufs_print_cylinder_stuff(sb, cg) /**/
 286#endif /* CONFIG_UFS_DEBUG */
 287
 288static const struct super_operations ufs_super_ops;
 289
 290static char error_buf[1024];
 291
 292void ufs_error (struct super_block * sb, const char * function,
 293        const char * fmt, ...)
 294{
 295        struct ufs_sb_private_info * uspi;
 296        struct ufs_super_block_first * usb1;
 297        va_list args;
 298
 299        uspi = UFS_SB(sb)->s_uspi;
 300        usb1 = ubh_get_usb_first(uspi);
 301        
 302        if (!(sb->s_flags & MS_RDONLY)) {
 303                usb1->fs_clean = UFS_FSBAD;
 304                ubh_mark_buffer_dirty(USPI_UBH(uspi));
 305                ufs_mark_sb_dirty(sb);
 306                sb->s_flags |= MS_RDONLY;
 307        }
 308        va_start (args, fmt);
 309        vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 310        va_end (args);
 311        switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 312        case UFS_MOUNT_ONERROR_PANIC:
 313                panic ("UFS-fs panic (device %s): %s: %s\n", 
 314                        sb->s_id, function, error_buf);
 315
 316        case UFS_MOUNT_ONERROR_LOCK:
 317        case UFS_MOUNT_ONERROR_UMOUNT:
 318        case UFS_MOUNT_ONERROR_REPAIR:
 319                printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 320                        sb->s_id, function, error_buf);
 321        }               
 322}
 323
 324void ufs_panic (struct super_block * sb, const char * function,
 325        const char * fmt, ...)
 326{
 327        struct ufs_sb_private_info * uspi;
 328        struct ufs_super_block_first * usb1;
 329        va_list args;
 330        
 331        uspi = UFS_SB(sb)->s_uspi;
 332        usb1 = ubh_get_usb_first(uspi);
 333        
 334        if (!(sb->s_flags & MS_RDONLY)) {
 335                usb1->fs_clean = UFS_FSBAD;
 336                ubh_mark_buffer_dirty(USPI_UBH(uspi));
 337                ufs_mark_sb_dirty(sb);
 338        }
 339        va_start (args, fmt);
 340        vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 341        va_end (args);
 342        sb->s_flags |= MS_RDONLY;
 343        printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 344                sb->s_id, function, error_buf);
 345}
 346
 347void ufs_warning (struct super_block * sb, const char * function,
 348        const char * fmt, ...)
 349{
 350        va_list args;
 351
 352        va_start (args, fmt);
 353        vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 354        va_end (args);
 355        printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 356                sb->s_id, function, error_buf);
 357}
 358
 359enum {
 360       Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 361       Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 362       Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 363       Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 364       Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 365       Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 366       Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 367       Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 368       Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 369       Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 370       Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 371       Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 372       Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 373       Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 374       Opt_err
 375};
 376
 377static const match_table_t tokens = {
 378        {Opt_type_old, "ufstype=old"},
 379        {Opt_type_sunx86, "ufstype=sunx86"},
 380        {Opt_type_sun, "ufstype=sun"},
 381        {Opt_type_sunos, "ufstype=sunos"},
 382        {Opt_type_44bsd, "ufstype=44bsd"},
 383        {Opt_type_ufs2, "ufstype=ufs2"},
 384        {Opt_type_ufs2, "ufstype=5xbsd"},
 385        {Opt_type_hp, "ufstype=hp"},
 386        {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 387        {Opt_type_nextstep, "ufstype=nextstep"},
 388        {Opt_type_openstep, "ufstype=openstep"},
 389/*end of possible ufs types */
 390        {Opt_onerror_panic, "onerror=panic"},
 391        {Opt_onerror_lock, "onerror=lock"},
 392        {Opt_onerror_umount, "onerror=umount"},
 393        {Opt_onerror_repair, "onerror=repair"},
 394        {Opt_err, NULL}
 395};
 396
 397static int ufs_parse_options (char * options, unsigned * mount_options)
 398{
 399        char * p;
 400        
 401        UFSD("ENTER\n");
 402        
 403        if (!options)
 404                return 1;
 405
 406        while ((p = strsep(&options, ",")) != NULL) {
 407                substring_t args[MAX_OPT_ARGS];
 408                int token;
 409                if (!*p)
 410                        continue;
 411
 412                token = match_token(p, tokens, args);
 413                switch (token) {
 414                case Opt_type_old:
 415                        ufs_clear_opt (*mount_options, UFSTYPE);
 416                        ufs_set_opt (*mount_options, UFSTYPE_OLD);
 417                        break;
 418                case Opt_type_sunx86:
 419                        ufs_clear_opt (*mount_options, UFSTYPE);
 420                        ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 421                        break;
 422                case Opt_type_sun:
 423                        ufs_clear_opt (*mount_options, UFSTYPE);
 424                        ufs_set_opt (*mount_options, UFSTYPE_SUN);
 425                        break;
 426                case Opt_type_sunos:
 427                        ufs_clear_opt(*mount_options, UFSTYPE);
 428                        ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 429                        break;
 430                case Opt_type_44bsd:
 431                        ufs_clear_opt (*mount_options, UFSTYPE);
 432                        ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 433                        break;
 434                case Opt_type_ufs2:
 435                        ufs_clear_opt(*mount_options, UFSTYPE);
 436                        ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 437                        break;
 438                case Opt_type_hp:
 439                        ufs_clear_opt (*mount_options, UFSTYPE);
 440                        ufs_set_opt (*mount_options, UFSTYPE_HP);
 441                        break;
 442                case Opt_type_nextstepcd:
 443                        ufs_clear_opt (*mount_options, UFSTYPE);
 444                        ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 445                        break;
 446                case Opt_type_nextstep:
 447                        ufs_clear_opt (*mount_options, UFSTYPE);
 448                        ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 449                        break;
 450                case Opt_type_openstep:
 451                        ufs_clear_opt (*mount_options, UFSTYPE);
 452                        ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 453                        break;
 454                case Opt_onerror_panic:
 455                        ufs_clear_opt (*mount_options, ONERROR);
 456                        ufs_set_opt (*mount_options, ONERROR_PANIC);
 457                        break;
 458                case Opt_onerror_lock:
 459                        ufs_clear_opt (*mount_options, ONERROR);
 460                        ufs_set_opt (*mount_options, ONERROR_LOCK);
 461                        break;
 462                case Opt_onerror_umount:
 463                        ufs_clear_opt (*mount_options, ONERROR);
 464                        ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 465                        break;
 466                case Opt_onerror_repair:
 467                        printk("UFS-fs: Unable to do repair on error, "
 468                                "will lock lock instead\n");
 469                        ufs_clear_opt (*mount_options, ONERROR);
 470                        ufs_set_opt (*mount_options, ONERROR_REPAIR);
 471                        break;
 472                default:
 473                        printk("UFS-fs: Invalid option: \"%s\" "
 474                                        "or missing value\n", p);
 475                        return 0;
 476                }
 477        }
 478        return 1;
 479}
 480
 481/*
 482 * Different types of UFS hold fs_cstotal in different
 483 * places, and use different data structure for it.
 484 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
 485 */
 486static void ufs_setup_cstotal(struct super_block *sb)
 487{
 488        struct ufs_sb_info *sbi = UFS_SB(sb);
 489        struct ufs_sb_private_info *uspi = sbi->s_uspi;
 490        struct ufs_super_block_first *usb1;
 491        struct ufs_super_block_second *usb2;
 492        struct ufs_super_block_third *usb3;
 493        unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 494
 495        UFSD("ENTER, mtype=%u\n", mtype);
 496        usb1 = ubh_get_usb_first(uspi);
 497        usb2 = ubh_get_usb_second(uspi);
 498        usb3 = ubh_get_usb_third(uspi);
 499
 500        if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 501             (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 502            mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 503                /*we have statistic in different place, then usual*/
 504                uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 505                uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 506                uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 507                uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 508        } else {
 509                uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 510                uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 511                uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 512                uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 513        }
 514        UFSD("EXIT\n");
 515}
 516
 517/*
 518 * Read on-disk structures associated with cylinder groups
 519 */
 520static int ufs_read_cylinder_structures(struct super_block *sb)
 521{
 522        struct ufs_sb_info *sbi = UFS_SB(sb);
 523        struct ufs_sb_private_info *uspi = sbi->s_uspi;
 524        struct ufs_buffer_head * ubh;
 525        unsigned char * base, * space;
 526        unsigned size, blks, i;
 527        struct ufs_super_block_third *usb3;
 528
 529        UFSD("ENTER\n");
 530
 531        usb3 = ubh_get_usb_third(uspi);
 532        /*
 533         * Read cs structures from (usually) first data block
 534         * on the device. 
 535         */
 536        size = uspi->s_cssize;
 537        blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 538        base = space = kmalloc(size, GFP_NOFS);
 539        if (!base)
 540                goto failed; 
 541        sbi->s_csp = (struct ufs_csum *)space;
 542        for (i = 0; i < blks; i += uspi->s_fpb) {
 543                size = uspi->s_bsize;
 544                if (i + uspi->s_fpb > blks)
 545                        size = (blks - i) * uspi->s_fsize;
 546
 547                ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 548                
 549                if (!ubh)
 550                        goto failed;
 551
 552                ubh_ubhcpymem (space, ubh, size);
 553
 554                space += size;
 555                ubh_brelse (ubh);
 556                ubh = NULL;
 557        }
 558
 559        /*
 560         * Read cylinder group (we read only first fragment from block
 561         * at this time) and prepare internal data structures for cg caching.
 562         */
 563        if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
 564                goto failed;
 565        for (i = 0; i < uspi->s_ncg; i++) 
 566                sbi->s_ucg[i] = NULL;
 567        for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 568                sbi->s_ucpi[i] = NULL;
 569                sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 570        }
 571        for (i = 0; i < uspi->s_ncg; i++) {
 572                UFSD("read cg %u\n", i);
 573                if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 574                        goto failed;
 575                if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 576                        goto failed;
 577
 578                ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 579        }
 580        for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 581                if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
 582                        goto failed;
 583                sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 584        }
 585        sbi->s_cg_loaded = 0;
 586        UFSD("EXIT\n");
 587        return 1;
 588
 589failed:
 590        kfree (base);
 591        if (sbi->s_ucg) {
 592                for (i = 0; i < uspi->s_ncg; i++)
 593                        if (sbi->s_ucg[i])
 594                                brelse (sbi->s_ucg[i]);
 595                kfree (sbi->s_ucg);
 596                for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 597                        kfree (sbi->s_ucpi[i]);
 598        }
 599        UFSD("EXIT (FAILED)\n");
 600        return 0;
 601}
 602
 603/*
 604 * Sync our internal copy of fs_cstotal with disk
 605 */
 606static void ufs_put_cstotal(struct super_block *sb)
 607{
 608        unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 609        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 610        struct ufs_super_block_first *usb1;
 611        struct ufs_super_block_second *usb2;
 612        struct ufs_super_block_third *usb3;
 613
 614        UFSD("ENTER\n");
 615        usb1 = ubh_get_usb_first(uspi);
 616        usb2 = ubh_get_usb_second(uspi);
 617        usb3 = ubh_get_usb_third(uspi);
 618
 619        if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 620             (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 621            mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 622                /*we have statistic in different place, then usual*/
 623                usb2->fs_un.fs_u2.cs_ndir =
 624                        cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 625                usb2->fs_un.fs_u2.cs_nbfree =
 626                        cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 627                usb3->fs_un1.fs_u2.cs_nifree =
 628                        cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 629                usb3->fs_un1.fs_u2.cs_nffree =
 630                        cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 631        } else {
 632                usb1->fs_cstotal.cs_ndir =
 633                        cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 634                usb1->fs_cstotal.cs_nbfree =
 635                        cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 636                usb1->fs_cstotal.cs_nifree =
 637                        cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 638                usb1->fs_cstotal.cs_nffree =
 639                        cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 640        }
 641        ubh_mark_buffer_dirty(USPI_UBH(uspi));
 642        ufs_print_super_stuff(sb, usb1, usb2, usb3);
 643        UFSD("EXIT\n");
 644}
 645
 646/**
 647 * ufs_put_super_internal() - put on-disk intrenal structures
 648 * @sb: pointer to super_block structure
 649 * Put on-disk structures associated with cylinder groups
 650 * and write them back to disk, also update cs_total on disk
 651 */
 652static void ufs_put_super_internal(struct super_block *sb)
 653{
 654        struct ufs_sb_info *sbi = UFS_SB(sb);
 655        struct ufs_sb_private_info *uspi = sbi->s_uspi;
 656        struct ufs_buffer_head * ubh;
 657        unsigned char * base, * space;
 658        unsigned blks, size, i;
 659
 660        
 661        UFSD("ENTER\n");
 662
 663        ufs_put_cstotal(sb);
 664        size = uspi->s_cssize;
 665        blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 666        base = space = (char*) sbi->s_csp;
 667        for (i = 0; i < blks; i += uspi->s_fpb) {
 668                size = uspi->s_bsize;
 669                if (i + uspi->s_fpb > blks)
 670                        size = (blks - i) * uspi->s_fsize;
 671
 672                ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 673
 674                ubh_memcpyubh (ubh, space, size);
 675                space += size;
 676                ubh_mark_buffer_uptodate (ubh, 1);
 677                ubh_mark_buffer_dirty (ubh);
 678                ubh_brelse (ubh);
 679        }
 680        for (i = 0; i < sbi->s_cg_loaded; i++) {
 681                ufs_put_cylinder (sb, i);
 682                kfree (sbi->s_ucpi[i]);
 683        }
 684        for (; i < UFS_MAX_GROUP_LOADED; i++) 
 685                kfree (sbi->s_ucpi[i]);
 686        for (i = 0; i < uspi->s_ncg; i++) 
 687                brelse (sbi->s_ucg[i]);
 688        kfree (sbi->s_ucg);
 689        kfree (base);
 690
 691        UFSD("EXIT\n");
 692}
 693
 694static int ufs_sync_fs(struct super_block *sb, int wait)
 695{
 696        struct ufs_sb_private_info * uspi;
 697        struct ufs_super_block_first * usb1;
 698        struct ufs_super_block_third * usb3;
 699        unsigned flags;
 700
 701        lock_ufs(sb);
 702        lock_super(sb);
 703
 704        UFSD("ENTER\n");
 705
 706        flags = UFS_SB(sb)->s_flags;
 707        uspi = UFS_SB(sb)->s_uspi;
 708        usb1 = ubh_get_usb_first(uspi);
 709        usb3 = ubh_get_usb_third(uspi);
 710
 711        usb1->fs_time = cpu_to_fs32(sb, get_seconds());
 712        if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
 713            (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 714            (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 715                ufs_set_fs_state(sb, usb1, usb3,
 716                                UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 717        ufs_put_cstotal(sb);
 718
 719        UFSD("EXIT\n");
 720        unlock_super(sb);
 721        unlock_ufs(sb);
 722
 723        return 0;
 724}
 725
 726static void delayed_sync_fs(struct work_struct *work)
 727{
 728        struct ufs_sb_info *sbi;
 729
 730        sbi = container_of(work, struct ufs_sb_info, sync_work.work);
 731
 732        spin_lock(&sbi->work_lock);
 733        sbi->work_queued = 0;
 734        spin_unlock(&sbi->work_lock);
 735
 736        ufs_sync_fs(sbi->sb, 1);
 737}
 738
 739void ufs_mark_sb_dirty(struct super_block *sb)
 740{
 741        struct ufs_sb_info *sbi = UFS_SB(sb);
 742        unsigned long delay;
 743
 744        spin_lock(&sbi->work_lock);
 745        if (!sbi->work_queued) {
 746                delay = msecs_to_jiffies(dirty_writeback_interval * 10);
 747                queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
 748                sbi->work_queued = 1;
 749        }
 750        spin_unlock(&sbi->work_lock);
 751}
 752
 753static void ufs_put_super(struct super_block *sb)
 754{
 755        struct ufs_sb_info * sbi = UFS_SB(sb);
 756
 757        UFSD("ENTER\n");
 758
 759        if (!(sb->s_flags & MS_RDONLY))
 760                ufs_put_super_internal(sb);
 761        cancel_delayed_work_sync(&sbi->sync_work);
 762
 763        ubh_brelse_uspi (sbi->s_uspi);
 764        kfree (sbi->s_uspi);
 765        kfree (sbi);
 766        sb->s_fs_info = NULL;
 767        UFSD("EXIT\n");
 768        return;
 769}
 770
 771static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 772{
 773        struct ufs_sb_info * sbi;
 774        struct ufs_sb_private_info * uspi;
 775        struct ufs_super_block_first * usb1;
 776        struct ufs_super_block_second * usb2;
 777        struct ufs_super_block_third * usb3;
 778        struct ufs_buffer_head * ubh;   
 779        struct inode *inode;
 780        unsigned block_size, super_block_size;
 781        unsigned flags;
 782        unsigned super_block_offset;
 783        unsigned maxsymlen;
 784        int ret = -EINVAL;
 785
 786        uspi = NULL;
 787        ubh = NULL;
 788        flags = 0;
 789        
 790        UFSD("ENTER\n");
 791                
 792        sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 793        if (!sbi)
 794                goto failed_nomem;
 795        sb->s_fs_info = sbi;
 796        sbi->sb = sb;
 797
 798        UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 799        
 800#ifndef CONFIG_UFS_FS_WRITE
 801        if (!(sb->s_flags & MS_RDONLY)) {
 802                printk("ufs was compiled with read-only support, "
 803                "can't be mounted as read-write\n");
 804                goto failed;
 805        }
 806#endif
 807        mutex_init(&sbi->mutex);
 808        spin_lock_init(&sbi->work_lock);
 809        INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
 810        /*
 811         * Set default mount options
 812         * Parse mount options
 813         */
 814        sbi->s_mount_opt = 0;
 815        ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 816        if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 817                printk("wrong mount options\n");
 818                goto failed;
 819        }
 820        if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 821                if (!silent)
 822                        printk("You didn't specify the type of your ufs filesystem\n\n"
 823                        "mount -t ufs -o ufstype="
 824                        "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 825                        ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 826                        "default is ufstype=old\n");
 827                ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 828        }
 829
 830        uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 831        sbi->s_uspi = uspi;
 832        if (!uspi)
 833                goto failed;
 834        uspi->s_dirblksize = UFS_SECTOR_SIZE;
 835        super_block_offset=UFS_SBLOCK;
 836
 837        /* Keep 2Gig file limit. Some UFS variants need to override 
 838           this but as I don't know which I'll let those in the know loosen
 839           the rules */
 840        switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 841        case UFS_MOUNT_UFSTYPE_44BSD:
 842                UFSD("ufstype=44bsd\n");
 843                uspi->s_fsize = block_size = 512;
 844                uspi->s_fmask = ~(512 - 1);
 845                uspi->s_fshift = 9;
 846                uspi->s_sbsize = super_block_size = 1536;
 847                uspi->s_sbbase = 0;
 848                flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 849                break;
 850        case UFS_MOUNT_UFSTYPE_UFS2:
 851                UFSD("ufstype=ufs2\n");
 852                super_block_offset=SBLOCK_UFS2;
 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_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 859                break;
 860                
 861        case UFS_MOUNT_UFSTYPE_SUN:
 862                UFSD("ufstype=sun\n");
 863                uspi->s_fsize = block_size = 1024;
 864                uspi->s_fmask = ~(1024 - 1);
 865                uspi->s_fshift = 10;
 866                uspi->s_sbsize = super_block_size = 2048;
 867                uspi->s_sbbase = 0;
 868                uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 869                flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 870                break;
 871
 872        case UFS_MOUNT_UFSTYPE_SUNOS:
 873                UFSD(("ufstype=sunos\n"))
 874                uspi->s_fsize = block_size = 1024;
 875                uspi->s_fmask = ~(1024 - 1);
 876                uspi->s_fshift = 10;
 877                uspi->s_sbsize = 2048;
 878                super_block_size = 2048;
 879                uspi->s_sbbase = 0;
 880                uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 881                flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 882                break;
 883
 884        case UFS_MOUNT_UFSTYPE_SUNx86:
 885                UFSD("ufstype=sunx86\n");
 886                uspi->s_fsize = block_size = 1024;
 887                uspi->s_fmask = ~(1024 - 1);
 888                uspi->s_fshift = 10;
 889                uspi->s_sbsize = super_block_size = 2048;
 890                uspi->s_sbbase = 0;
 891                uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 892                flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 893                break;
 894
 895        case UFS_MOUNT_UFSTYPE_OLD:
 896                UFSD("ufstype=old\n");
 897                uspi->s_fsize = block_size = 1024;
 898                uspi->s_fmask = ~(1024 - 1);
 899                uspi->s_fshift = 10;
 900                uspi->s_sbsize = super_block_size = 2048;
 901                uspi->s_sbbase = 0;
 902                flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 903                if (!(sb->s_flags & MS_RDONLY)) {
 904                        if (!silent)
 905                                printk(KERN_INFO "ufstype=old is supported read-only\n");
 906                        sb->s_flags |= MS_RDONLY;
 907                }
 908                break;
 909        
 910        case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 911                UFSD("ufstype=nextstep\n");
 912                uspi->s_fsize = block_size = 1024;
 913                uspi->s_fmask = ~(1024 - 1);
 914                uspi->s_fshift = 10;
 915                uspi->s_sbsize = super_block_size = 2048;
 916                uspi->s_sbbase = 0;
 917                uspi->s_dirblksize = 1024;
 918                flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 919                if (!(sb->s_flags & MS_RDONLY)) {
 920                        if (!silent)
 921                                printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 922                        sb->s_flags |= MS_RDONLY;
 923                }
 924                break;
 925        
 926        case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 927                UFSD("ufstype=nextstep-cd\n");
 928                uspi->s_fsize = block_size = 2048;
 929                uspi->s_fmask = ~(2048 - 1);
 930                uspi->s_fshift = 11;
 931                uspi->s_sbsize = super_block_size = 2048;
 932                uspi->s_sbbase = 0;
 933                uspi->s_dirblksize = 1024;
 934                flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 935                if (!(sb->s_flags & MS_RDONLY)) {
 936                        if (!silent)
 937                                printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 938                        sb->s_flags |= MS_RDONLY;
 939                }
 940                break;
 941        
 942        case UFS_MOUNT_UFSTYPE_OPENSTEP:
 943                UFSD("ufstype=openstep\n");
 944                uspi->s_fsize = block_size = 1024;
 945                uspi->s_fmask = ~(1024 - 1);
 946                uspi->s_fshift = 10;
 947                uspi->s_sbsize = super_block_size = 2048;
 948                uspi->s_sbbase = 0;
 949                uspi->s_dirblksize = 1024;
 950                flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 951                if (!(sb->s_flags & MS_RDONLY)) {
 952                        if (!silent)
 953                                printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 954                        sb->s_flags |= MS_RDONLY;
 955                }
 956                break;
 957        
 958        case UFS_MOUNT_UFSTYPE_HP:
 959                UFSD("ufstype=hp\n");
 960                uspi->s_fsize = block_size = 1024;
 961                uspi->s_fmask = ~(1024 - 1);
 962                uspi->s_fshift = 10;
 963                uspi->s_sbsize = super_block_size = 2048;
 964                uspi->s_sbbase = 0;
 965                flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 966                if (!(sb->s_flags & MS_RDONLY)) {
 967                        if (!silent)
 968                                printk(KERN_INFO "ufstype=hp is supported read-only\n");
 969                        sb->s_flags |= MS_RDONLY;
 970                }
 971                break;
 972        default:
 973                if (!silent)
 974                        printk("unknown ufstype\n");
 975                goto failed;
 976        }
 977        
 978again:  
 979        if (!sb_set_blocksize(sb, block_size)) {
 980                printk(KERN_ERR "UFS: failed to set blocksize\n");
 981                goto failed;
 982        }
 983
 984        /*
 985         * read ufs super block from device
 986         */
 987
 988        ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 989        
 990        if (!ubh) 
 991            goto failed;
 992
 993        usb1 = ubh_get_usb_first(uspi);
 994        usb2 = ubh_get_usb_second(uspi);
 995        usb3 = ubh_get_usb_third(uspi);
 996
 997        /* Sort out mod used on SunOS 4.1.3 for fs_state */
 998        uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 999        if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1000            (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1001                flags &= ~UFS_ST_MASK;
1002                flags |=  UFS_ST_SUN;
1003        }
1004
1005        /*
1006         * Check ufs magic number
1007         */
1008        sbi->s_bytesex = BYTESEX_LE;
1009        switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1010                case UFS_MAGIC:
1011                case UFS_MAGIC_BW:
1012                case UFS2_MAGIC:
1013                case UFS_MAGIC_LFN:
1014                case UFS_MAGIC_FEA:
1015                case UFS_MAGIC_4GB:
1016                        goto magic_found;
1017        }
1018        sbi->s_bytesex = BYTESEX_BE;
1019        switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1020                case UFS_MAGIC:
1021                case UFS_MAGIC_BW:
1022                case UFS2_MAGIC:
1023                case UFS_MAGIC_LFN:
1024                case UFS_MAGIC_FEA:
1025                case UFS_MAGIC_4GB:
1026                        goto magic_found;
1027        }
1028
1029        if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
1030          || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
1031          || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
1032          && uspi->s_sbbase < 256) {
1033                ubh_brelse_uspi(uspi);
1034                ubh = NULL;
1035                uspi->s_sbbase += 8;
1036                goto again;
1037        }
1038        if (!silent)
1039                printk("ufs_read_super: bad magic number\n");
1040        goto failed;
1041
1042magic_found:
1043        /*
1044         * Check block and fragment sizes
1045         */
1046        uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1047        uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1048        uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1049        uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1050        uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1051
1052        if (!is_power_of_2(uspi->s_fsize)) {
1053                printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
1054                        uspi->s_fsize);
1055                        goto failed;
1056        }
1057        if (uspi->s_fsize < 512) {
1058                printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
1059                        uspi->s_fsize);
1060                goto failed;
1061        }
1062        if (uspi->s_fsize > 4096) {
1063                printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
1064                        uspi->s_fsize);
1065                goto failed;
1066        }
1067        if (!is_power_of_2(uspi->s_bsize)) {
1068                printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
1069                        uspi->s_bsize);
1070                goto failed;
1071        }
1072        if (uspi->s_bsize < 4096) {
1073                printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
1074                        uspi->s_bsize);
1075                goto failed;
1076        }
1077        if (uspi->s_bsize / uspi->s_fsize > 8) {
1078                printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
1079                        uspi->s_bsize / uspi->s_fsize);
1080                goto failed;
1081        }
1082        if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1083                ubh_brelse_uspi(uspi);
1084                ubh = NULL;
1085                block_size = uspi->s_fsize;
1086                super_block_size = uspi->s_sbsize;
1087                UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1088                goto again;
1089        }
1090
1091        sbi->s_flags = flags;/*after that line some functions use s_flags*/
1092        ufs_print_super_stuff(sb, usb1, usb2, usb3);
1093
1094        /*
1095         * Check, if file system was correctly unmounted.
1096         * If not, make it read only.
1097         */
1098        if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1099          ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1100          (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1101            (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1102          (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1103          (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1104                switch(usb1->fs_clean) {
1105                case UFS_FSCLEAN:
1106                        UFSD("fs is clean\n");
1107                        break;
1108                case UFS_FSSTABLE:
1109                        UFSD("fs is stable\n");
1110                        break;
1111                case UFS_FSLOG:
1112                        UFSD("fs is logging fs\n");
1113                        break;
1114                case UFS_FSOSF1:
1115                        UFSD("fs is DEC OSF/1\n");
1116                        break;
1117                case UFS_FSACTIVE:
1118                        printk("ufs_read_super: fs is active\n");
1119                        sb->s_flags |= MS_RDONLY;
1120                        break;
1121                case UFS_FSBAD:
1122                        printk("ufs_read_super: fs is bad\n");
1123                        sb->s_flags |= MS_RDONLY;
1124                        break;
1125                default:
1126                        printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1127                        sb->s_flags |= MS_RDONLY;
1128                        break;
1129                }
1130        } else {
1131                printk("ufs_read_super: fs needs fsck\n");
1132                sb->s_flags |= MS_RDONLY;
1133        }
1134
1135        /*
1136         * Read ufs_super_block into internal data structures
1137         */
1138        sb->s_op = &ufs_super_ops;
1139        sb->s_export_op = &ufs_export_ops;
1140
1141        sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1142
1143        uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1144        uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1145        uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1146        uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1147        uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1148        uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1149
1150        if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1151                uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1152                uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1153        } else {
1154                uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1155                uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1156        }
1157
1158        uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1159        /* s_bsize already set */
1160        /* s_fsize already set */
1161        uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1162        uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1163        uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1164        uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1165        uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1166        uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1167        UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1168                uspi->s_fshift);
1169        uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1170        uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1171        /* s_sbsize already set */
1172        uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1173        uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1174        uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1175        uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1176        uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1177        uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1178        uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1179        uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1180
1181        if (uspi->fs_magic == UFS2_MAGIC)
1182                uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1183        else
1184                uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1185
1186        uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1187        uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1188        uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1189        uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1190        uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1191        uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1192        uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1193        uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1194        uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1195        uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1196        uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1197        uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1198        uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1199        uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1200
1201        /*
1202         * Compute another frequently used values
1203         */
1204        uspi->s_fpbmask = uspi->s_fpb - 1;
1205        if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1206                uspi->s_apbshift = uspi->s_bshift - 3;
1207        else
1208                uspi->s_apbshift = uspi->s_bshift - 2;
1209
1210        uspi->s_2apbshift = uspi->s_apbshift * 2;
1211        uspi->s_3apbshift = uspi->s_apbshift * 3;
1212        uspi->s_apb = 1 << uspi->s_apbshift;
1213        uspi->s_2apb = 1 << uspi->s_2apbshift;
1214        uspi->s_3apb = 1 << uspi->s_3apbshift;
1215        uspi->s_apbmask = uspi->s_apb - 1;
1216        uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1217        uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1218        uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1219        uspi->s_bpf = uspi->s_fsize << 3;
1220        uspi->s_bpfshift = uspi->s_fshift + 3;
1221        uspi->s_bpfmask = uspi->s_bpf - 1;
1222        if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1223            (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1224                uspi->s_maxsymlinklen =
1225                    fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1226
1227        if (uspi->fs_magic == UFS2_MAGIC)
1228                maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1229        else
1230                maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1231        if (uspi->s_maxsymlinklen > maxsymlen) {
1232                ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1233                            "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1234                uspi->s_maxsymlinklen = maxsymlen;
1235        }
1236        sb->s_max_links = UFS_LINK_MAX;
1237
1238        inode = ufs_iget(sb, UFS_ROOTINO);
1239        if (IS_ERR(inode)) {
1240                ret = PTR_ERR(inode);
1241                goto failed;
1242        }
1243        sb->s_root = d_make_root(inode);
1244        if (!sb->s_root) {
1245                ret = -ENOMEM;
1246                goto failed;
1247        }
1248
1249        ufs_setup_cstotal(sb);
1250        /*
1251         * Read cylinder group structures
1252         */
1253        if (!(sb->s_flags & MS_RDONLY))
1254                if (!ufs_read_cylinder_structures(sb))
1255                        goto failed;
1256
1257        UFSD("EXIT\n");
1258        return 0;
1259
1260failed:
1261        if (ubh)
1262                ubh_brelse_uspi (uspi);
1263        kfree (uspi);
1264        kfree(sbi);
1265        sb->s_fs_info = NULL;
1266        UFSD("EXIT (FAILED)\n");
1267        return ret;
1268
1269failed_nomem:
1270        UFSD("EXIT (NOMEM)\n");
1271        return -ENOMEM;
1272}
1273
1274static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1275{
1276        struct ufs_sb_private_info * uspi;
1277        struct ufs_super_block_first * usb1;
1278        struct ufs_super_block_third * usb3;
1279        unsigned new_mount_opt, ufstype;
1280        unsigned flags;
1281
1282        lock_ufs(sb);
1283        lock_super(sb);
1284        uspi = UFS_SB(sb)->s_uspi;
1285        flags = UFS_SB(sb)->s_flags;
1286        usb1 = ubh_get_usb_first(uspi);
1287        usb3 = ubh_get_usb_third(uspi);
1288        
1289        /*
1290         * Allow the "check" option to be passed as a remount option.
1291         * It is not possible to change ufstype option during remount
1292         */
1293        ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1294        new_mount_opt = 0;
1295        ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1296        if (!ufs_parse_options (data, &new_mount_opt)) {
1297                unlock_super(sb);
1298                unlock_ufs(sb);
1299                return -EINVAL;
1300        }
1301        if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1302                new_mount_opt |= ufstype;
1303        } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1304                printk("ufstype can't be changed during remount\n");
1305                unlock_super(sb);
1306                unlock_ufs(sb);
1307                return -EINVAL;
1308        }
1309
1310        if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1311                UFS_SB(sb)->s_mount_opt = new_mount_opt;
1312                unlock_super(sb);
1313                unlock_ufs(sb);
1314                return 0;
1315        }
1316        
1317        /*
1318         * fs was mouted as rw, remounting ro
1319         */
1320        if (*mount_flags & MS_RDONLY) {
1321                ufs_put_super_internal(sb);
1322                usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1323                if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1324                  || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1325                  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1326                        ufs_set_fs_state(sb, usb1, usb3,
1327                                UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1328                ubh_mark_buffer_dirty (USPI_UBH(uspi));
1329                sb->s_flags |= MS_RDONLY;
1330        } else {
1331        /*
1332         * fs was mounted as ro, remounting rw
1333         */
1334#ifndef CONFIG_UFS_FS_WRITE
1335                printk("ufs was compiled with read-only support, "
1336                "can't be mounted as read-write\n");
1337                unlock_super(sb);
1338                unlock_ufs(sb);
1339                return -EINVAL;
1340#else
1341                if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1342                    ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1343                    ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1344                    ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1345                    ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1346                        printk("this ufstype is read-only supported\n");
1347                        unlock_super(sb);
1348                        unlock_ufs(sb);
1349                        return -EINVAL;
1350                }
1351                if (!ufs_read_cylinder_structures(sb)) {
1352                        printk("failed during remounting\n");
1353                        unlock_super(sb);
1354                        unlock_ufs(sb);
1355                        return -EPERM;
1356                }
1357                sb->s_flags &= ~MS_RDONLY;
1358#endif
1359        }
1360        UFS_SB(sb)->s_mount_opt = new_mount_opt;
1361        unlock_super(sb);
1362        unlock_ufs(sb);
1363        return 0;
1364}
1365
1366static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1367{
1368        struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1369        unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1370        const struct match_token *tp = tokens;
1371
1372        while (tp->token != Opt_onerror_panic && tp->token != mval)
1373                ++tp;
1374        BUG_ON(tp->token == Opt_onerror_panic);
1375        seq_printf(seq, ",%s", tp->pattern);
1376
1377        mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1378        while (tp->token != Opt_err && tp->token != mval)
1379                ++tp;
1380        BUG_ON(tp->token == Opt_err);
1381        seq_printf(seq, ",%s", tp->pattern);
1382
1383        return 0;
1384}
1385
1386static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1387{
1388        struct super_block *sb = dentry->d_sb;
1389        struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1390        unsigned  flags = UFS_SB(sb)->s_flags;
1391        struct ufs_super_block_first *usb1;
1392        struct ufs_super_block_second *usb2;
1393        struct ufs_super_block_third *usb3;
1394        u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1395
1396        lock_ufs(sb);
1397
1398        usb1 = ubh_get_usb_first(uspi);
1399        usb2 = ubh_get_usb_second(uspi);
1400        usb3 = ubh_get_usb_third(uspi);
1401        
1402        if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1403                buf->f_type = UFS2_MAGIC;
1404                buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1405        } else {
1406                buf->f_type = UFS_MAGIC;
1407                buf->f_blocks = uspi->s_dsize;
1408        }
1409        buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1410                uspi->cs_total.cs_nffree;
1411        buf->f_ffree = uspi->cs_total.cs_nifree;
1412        buf->f_bsize = sb->s_blocksize;
1413        buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1414                ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1415        buf->f_files = uspi->s_ncg * uspi->s_ipg;
1416        buf->f_namelen = UFS_MAXNAMLEN;
1417        buf->f_fsid.val[0] = (u32)id;
1418        buf->f_fsid.val[1] = (u32)(id >> 32);
1419
1420        unlock_ufs(sb);
1421
1422        return 0;
1423}
1424
1425static struct kmem_cache * ufs_inode_cachep;
1426
1427static struct inode *ufs_alloc_inode(struct super_block *sb)
1428{
1429        struct ufs_inode_info *ei;
1430        ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1431        if (!ei)
1432                return NULL;
1433        ei->vfs_inode.i_version = 1;
1434        return &ei->vfs_inode;
1435}
1436
1437static void ufs_i_callback(struct rcu_head *head)
1438{
1439        struct inode *inode = container_of(head, struct inode, i_rcu);
1440        kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1441}
1442
1443static void ufs_destroy_inode(struct inode *inode)
1444{
1445        call_rcu(&inode->i_rcu, ufs_i_callback);
1446}
1447
1448static void init_once(void *foo)
1449{
1450        struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1451
1452        inode_init_once(&ei->vfs_inode);
1453}
1454
1455static int init_inodecache(void)
1456{
1457        ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1458                                             sizeof(struct ufs_inode_info),
1459                                             0, (SLAB_RECLAIM_ACCOUNT|
1460                                                SLAB_MEM_SPREAD),
1461                                             init_once);
1462        if (ufs_inode_cachep == NULL)
1463                return -ENOMEM;
1464        return 0;
1465}
1466
1467static void destroy_inodecache(void)
1468{
1469        kmem_cache_destroy(ufs_inode_cachep);
1470}
1471
1472static const struct super_operations ufs_super_ops = {
1473        .alloc_inode    = ufs_alloc_inode,
1474        .destroy_inode  = ufs_destroy_inode,
1475        .write_inode    = ufs_write_inode,
1476        .evict_inode    = ufs_evict_inode,
1477        .put_super      = ufs_put_super,
1478        .sync_fs        = ufs_sync_fs,
1479        .statfs         = ufs_statfs,
1480        .remount_fs     = ufs_remount,
1481        .show_options   = ufs_show_options,
1482};
1483
1484static struct dentry *ufs_mount(struct file_system_type *fs_type,
1485        int flags, const char *dev_name, void *data)
1486{
1487        return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1488}
1489
1490static struct file_system_type ufs_fs_type = {
1491        .owner          = THIS_MODULE,
1492        .name           = "ufs",
1493        .mount          = ufs_mount,
1494        .kill_sb        = kill_block_super,
1495        .fs_flags       = FS_REQUIRES_DEV,
1496};
1497
1498static int __init init_ufs_fs(void)
1499{
1500        int err = init_inodecache();
1501        if (err)
1502                goto out1;
1503        err = register_filesystem(&ufs_fs_type);
1504        if (err)
1505                goto out;
1506        return 0;
1507out:
1508        destroy_inodecache();
1509out1:
1510        return err;
1511}
1512
1513static void __exit exit_ufs_fs(void)
1514{
1515        unregister_filesystem(&ufs_fs_type);
1516        destroy_inodecache();
1517}
1518
1519module_init(init_ufs_fs)
1520module_exit(exit_ufs_fs)
1521MODULE_LICENSE("GPL");
1522
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