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0010 #include "hpfs_fn.h"
0011 #include <linux/module.h>
0012 #include <linux/parser.h>
0013 #include <linux/init.h>
0014 #include <linux/statfs.h>
0015 #include <linux/magic.h>
0016 #include <linux/sched.h>
0017 #include <linux/bitmap.h>
0018 #include <linux/slab.h>
0019 #include <linux/seq_file.h>
0020
0021
0022
0023 static void mark_dirty(struct super_block *s, int remount)
0024 {
0025 if (hpfs_sb(s)->sb_chkdsk && (remount || !sb_rdonly(s))) {
0026 struct buffer_head *bh;
0027 struct hpfs_spare_block *sb;
0028 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
0029 sb->dirty = 1;
0030 sb->old_wrote = 0;
0031 mark_buffer_dirty(bh);
0032 sync_dirty_buffer(bh);
0033 brelse(bh);
0034 }
0035 }
0036 }
0037
0038
0039
0040
0041 static void unmark_dirty(struct super_block *s)
0042 {
0043 struct buffer_head *bh;
0044 struct hpfs_spare_block *sb;
0045 if (sb_rdonly(s)) return;
0046 sync_blockdev(s->s_bdev);
0047 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
0048 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error;
0049 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error;
0050 mark_buffer_dirty(bh);
0051 sync_dirty_buffer(bh);
0052 brelse(bh);
0053 }
0054 }
0055
0056
0057 void hpfs_error(struct super_block *s, const char *fmt, ...)
0058 {
0059 struct va_format vaf;
0060 va_list args;
0061
0062 va_start(args, fmt);
0063
0064 vaf.fmt = fmt;
0065 vaf.va = &args;
0066
0067 pr_err("filesystem error: %pV", &vaf);
0068
0069 va_end(args);
0070
0071 if (!hpfs_sb(s)->sb_was_error) {
0072 if (hpfs_sb(s)->sb_err == 2) {
0073 pr_cont("; crashing the system because you wanted it\n");
0074 mark_dirty(s, 0);
0075 panic("HPFS panic");
0076 } else if (hpfs_sb(s)->sb_err == 1) {
0077 if (sb_rdonly(s))
0078 pr_cont("; already mounted read-only\n");
0079 else {
0080 pr_cont("; remounting read-only\n");
0081 mark_dirty(s, 0);
0082 s->s_flags |= SB_RDONLY;
0083 }
0084 } else if (sb_rdonly(s))
0085 pr_cont("; going on - but anything won't be destroyed because it's read-only\n");
0086 else
0087 pr_cont("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n");
0088 } else
0089 pr_cont("\n");
0090 hpfs_sb(s)->sb_was_error = 1;
0091 }
0092
0093
0094
0095
0096
0097
0098
0099
0100
0101 int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
0102 char *msg)
0103 {
0104 if (*c2 && *c1 == key) {
0105 hpfs_error(s, "cycle detected on key %08x in %s", key, msg);
0106 return 1;
0107 }
0108 (*c2)++;
0109 if (!((*c2 - 1) & *c2)) *c1 = key;
0110 return 0;
0111 }
0112
0113 static void free_sbi(struct hpfs_sb_info *sbi)
0114 {
0115 kfree(sbi->sb_cp_table);
0116 kfree(sbi->sb_bmp_dir);
0117 kfree(sbi);
0118 }
0119
0120 static void lazy_free_sbi(struct rcu_head *rcu)
0121 {
0122 free_sbi(container_of(rcu, struct hpfs_sb_info, rcu));
0123 }
0124
0125 static void hpfs_put_super(struct super_block *s)
0126 {
0127 hpfs_lock(s);
0128 unmark_dirty(s);
0129 hpfs_unlock(s);
0130 call_rcu(&hpfs_sb(s)->rcu, lazy_free_sbi);
0131 }
0132
0133 static unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
0134 {
0135 struct quad_buffer_head qbh;
0136 unsigned long *bits;
0137 unsigned count;
0138
0139 bits = hpfs_map_4sectors(s, secno, &qbh, 0);
0140 if (!bits)
0141 return (unsigned)-1;
0142 count = bitmap_weight(bits, 2048 * BITS_PER_BYTE);
0143 hpfs_brelse4(&qbh);
0144 return count;
0145 }
0146
0147 static unsigned count_bitmaps(struct super_block *s)
0148 {
0149 unsigned n, count, n_bands;
0150 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
0151 count = 0;
0152 for (n = 0; n < COUNT_RD_AHEAD; n++) {
0153 hpfs_prefetch_bitmap(s, n);
0154 }
0155 for (n = 0; n < n_bands; n++) {
0156 unsigned c;
0157 hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD);
0158 c = hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n]));
0159 if (c != (unsigned)-1)
0160 count += c;
0161 }
0162 return count;
0163 }
0164
0165 unsigned hpfs_get_free_dnodes(struct super_block *s)
0166 {
0167 struct hpfs_sb_info *sbi = hpfs_sb(s);
0168 if (sbi->sb_n_free_dnodes == (unsigned)-1) {
0169 unsigned c = hpfs_count_one_bitmap(s, sbi->sb_dmap);
0170 if (c == (unsigned)-1)
0171 return 0;
0172 sbi->sb_n_free_dnodes = c;
0173 }
0174 return sbi->sb_n_free_dnodes;
0175 }
0176
0177 static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
0178 {
0179 struct super_block *s = dentry->d_sb;
0180 struct hpfs_sb_info *sbi = hpfs_sb(s);
0181 u64 id = huge_encode_dev(s->s_bdev->bd_dev);
0182
0183 hpfs_lock(s);
0184
0185 if (sbi->sb_n_free == (unsigned)-1)
0186 sbi->sb_n_free = count_bitmaps(s);
0187
0188 buf->f_type = s->s_magic;
0189 buf->f_bsize = 512;
0190 buf->f_blocks = sbi->sb_fs_size;
0191 buf->f_bfree = sbi->sb_n_free;
0192 buf->f_bavail = sbi->sb_n_free;
0193 buf->f_files = sbi->sb_dirband_size / 4;
0194 buf->f_ffree = hpfs_get_free_dnodes(s);
0195 buf->f_fsid = u64_to_fsid(id);
0196 buf->f_namelen = 254;
0197
0198 hpfs_unlock(s);
0199
0200 return 0;
0201 }
0202
0203
0204 long hpfs_ioctl(struct file *file, unsigned cmd, unsigned long arg)
0205 {
0206 switch (cmd) {
0207 case FITRIM: {
0208 struct fstrim_range range;
0209 secno n_trimmed;
0210 int r;
0211 if (!capable(CAP_SYS_ADMIN))
0212 return -EPERM;
0213 if (copy_from_user(&range, (struct fstrim_range __user *)arg, sizeof(range)))
0214 return -EFAULT;
0215 r = hpfs_trim_fs(file_inode(file)->i_sb, range.start >> 9, (range.start + range.len) >> 9, (range.minlen + 511) >> 9, &n_trimmed);
0216 if (r)
0217 return r;
0218 range.len = (u64)n_trimmed << 9;
0219 if (copy_to_user((struct fstrim_range __user *)arg, &range, sizeof(range)))
0220 return -EFAULT;
0221 return 0;
0222 }
0223 default: {
0224 return -ENOIOCTLCMD;
0225 }
0226 }
0227 }
0228
0229
0230 static struct kmem_cache * hpfs_inode_cachep;
0231
0232 static struct inode *hpfs_alloc_inode(struct super_block *sb)
0233 {
0234 struct hpfs_inode_info *ei;
0235 ei = alloc_inode_sb(sb, hpfs_inode_cachep, GFP_NOFS);
0236 if (!ei)
0237 return NULL;
0238 return &ei->vfs_inode;
0239 }
0240
0241 static void hpfs_free_inode(struct inode *inode)
0242 {
0243 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
0244 }
0245
0246 static void init_once(void *foo)
0247 {
0248 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
0249
0250 inode_init_once(&ei->vfs_inode);
0251 }
0252
0253 static int init_inodecache(void)
0254 {
0255 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache",
0256 sizeof(struct hpfs_inode_info),
0257 0, (SLAB_RECLAIM_ACCOUNT|
0258 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
0259 init_once);
0260 if (hpfs_inode_cachep == NULL)
0261 return -ENOMEM;
0262 return 0;
0263 }
0264
0265 static void destroy_inodecache(void)
0266 {
0267
0268
0269
0270
0271 rcu_barrier();
0272 kmem_cache_destroy(hpfs_inode_cachep);
0273 }
0274
0275
0276
0277
0278
0279
0280
0281 enum {
0282 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis,
0283 Opt_check_none, Opt_check_normal, Opt_check_strict,
0284 Opt_err_cont, Opt_err_ro, Opt_err_panic,
0285 Opt_eas_no, Opt_eas_ro, Opt_eas_rw,
0286 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always,
0287 Opt_timeshift, Opt_err,
0288 };
0289
0290 static const match_table_t tokens = {
0291 {Opt_help, "help"},
0292 {Opt_uid, "uid=%u"},
0293 {Opt_gid, "gid=%u"},
0294 {Opt_umask, "umask=%o"},
0295 {Opt_case_lower, "case=lower"},
0296 {Opt_case_asis, "case=asis"},
0297 {Opt_check_none, "check=none"},
0298 {Opt_check_normal, "check=normal"},
0299 {Opt_check_strict, "check=strict"},
0300 {Opt_err_cont, "errors=continue"},
0301 {Opt_err_ro, "errors=remount-ro"},
0302 {Opt_err_panic, "errors=panic"},
0303 {Opt_eas_no, "eas=no"},
0304 {Opt_eas_ro, "eas=ro"},
0305 {Opt_eas_rw, "eas=rw"},
0306 {Opt_chkdsk_no, "chkdsk=no"},
0307 {Opt_chkdsk_errors, "chkdsk=errors"},
0308 {Opt_chkdsk_always, "chkdsk=always"},
0309 {Opt_timeshift, "timeshift=%d"},
0310 {Opt_err, NULL},
0311 };
0312
0313 static int parse_opts(char *opts, kuid_t *uid, kgid_t *gid, umode_t *umask,
0314 int *lowercase, int *eas, int *chk, int *errs,
0315 int *chkdsk, int *timeshift)
0316 {
0317 char *p;
0318 int option;
0319
0320 if (!opts)
0321 return 1;
0322
0323
0324
0325 while ((p = strsep(&opts, ",")) != NULL) {
0326 substring_t args[MAX_OPT_ARGS];
0327 int token;
0328 if (!*p)
0329 continue;
0330
0331 token = match_token(p, tokens, args);
0332 switch (token) {
0333 case Opt_help:
0334 return 2;
0335 case Opt_uid:
0336 if (match_int(args, &option))
0337 return 0;
0338 *uid = make_kuid(current_user_ns(), option);
0339 if (!uid_valid(*uid))
0340 return 0;
0341 break;
0342 case Opt_gid:
0343 if (match_int(args, &option))
0344 return 0;
0345 *gid = make_kgid(current_user_ns(), option);
0346 if (!gid_valid(*gid))
0347 return 0;
0348 break;
0349 case Opt_umask:
0350 if (match_octal(args, &option))
0351 return 0;
0352 *umask = option;
0353 break;
0354 case Opt_case_lower:
0355 *lowercase = 1;
0356 break;
0357 case Opt_case_asis:
0358 *lowercase = 0;
0359 break;
0360 case Opt_check_none:
0361 *chk = 0;
0362 break;
0363 case Opt_check_normal:
0364 *chk = 1;
0365 break;
0366 case Opt_check_strict:
0367 *chk = 2;
0368 break;
0369 case Opt_err_cont:
0370 *errs = 0;
0371 break;
0372 case Opt_err_ro:
0373 *errs = 1;
0374 break;
0375 case Opt_err_panic:
0376 *errs = 2;
0377 break;
0378 case Opt_eas_no:
0379 *eas = 0;
0380 break;
0381 case Opt_eas_ro:
0382 *eas = 1;
0383 break;
0384 case Opt_eas_rw:
0385 *eas = 2;
0386 break;
0387 case Opt_chkdsk_no:
0388 *chkdsk = 0;
0389 break;
0390 case Opt_chkdsk_errors:
0391 *chkdsk = 1;
0392 break;
0393 case Opt_chkdsk_always:
0394 *chkdsk = 2;
0395 break;
0396 case Opt_timeshift:
0397 {
0398 int m = 1;
0399 char *rhs = args[0].from;
0400 if (!rhs || !*rhs)
0401 return 0;
0402 if (*rhs == '-') m = -1;
0403 if (*rhs == '+' || *rhs == '-') rhs++;
0404 *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
0405 if (*rhs)
0406 return 0;
0407 break;
0408 }
0409 default:
0410 return 0;
0411 }
0412 }
0413 return 1;
0414 }
0415
0416 static inline void hpfs_help(void)
0417 {
0418 pr_info("\n\
0419 HPFS filesystem options:\n\
0420 help do not mount and display this text\n\
0421 uid=xxx set uid of files that don't have uid specified in eas\n\
0422 gid=xxx set gid of files that don't have gid specified in eas\n\
0423 umask=xxx set mode of files that don't have mode specified in eas\n\
0424 case=lower lowercase all files\n\
0425 case=asis do not lowercase files (default)\n\
0426 check=none no fs checks - kernel may crash on corrupted filesystem\n\
0427 check=normal do some checks - it should not crash (default)\n\
0428 check=strict do extra time-consuming checks, used for debugging\n\
0429 errors=continue continue on errors\n\
0430 errors=remount-ro remount read-only if errors found (default)\n\
0431 errors=panic panic on errors\n\
0432 chkdsk=no do not mark fs for chkdsking even if there were errors\n\
0433 chkdsk=errors mark fs dirty if errors found (default)\n\
0434 chkdsk=always always mark fs dirty - used for debugging\n\
0435 eas=no ignore extended attributes\n\
0436 eas=ro read but do not write extended attributes\n\
0437 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
0438 timeshift=nnn add nnn seconds to file times\n\
0439 \n");
0440 }
0441
0442 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
0443 {
0444 kuid_t uid;
0445 kgid_t gid;
0446 umode_t umask;
0447 int lowercase, eas, chk, errs, chkdsk, timeshift;
0448 int o;
0449 struct hpfs_sb_info *sbi = hpfs_sb(s);
0450
0451 sync_filesystem(s);
0452
0453 *flags |= SB_NOATIME;
0454
0455 hpfs_lock(s);
0456 uid = sbi->sb_uid; gid = sbi->sb_gid;
0457 umask = 0777 & ~sbi->sb_mode;
0458 lowercase = sbi->sb_lowercase;
0459 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk;
0460 errs = sbi->sb_err; timeshift = sbi->sb_timeshift;
0461
0462 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase,
0463 &eas, &chk, &errs, &chkdsk, ×hift))) {
0464 pr_err("bad mount options.\n");
0465 goto out_err;
0466 }
0467 if (o == 2) {
0468 hpfs_help();
0469 goto out_err;
0470 }
0471 if (timeshift != sbi->sb_timeshift) {
0472 pr_err("timeshift can't be changed using remount.\n");
0473 goto out_err;
0474 }
0475
0476 unmark_dirty(s);
0477
0478 sbi->sb_uid = uid; sbi->sb_gid = gid;
0479 sbi->sb_mode = 0777 & ~umask;
0480 sbi->sb_lowercase = lowercase;
0481 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk;
0482 sbi->sb_err = errs; sbi->sb_timeshift = timeshift;
0483
0484 if (!(*flags & SB_RDONLY)) mark_dirty(s, 1);
0485
0486 hpfs_unlock(s);
0487 return 0;
0488
0489 out_err:
0490 hpfs_unlock(s);
0491 return -EINVAL;
0492 }
0493
0494 static int hpfs_show_options(struct seq_file *seq, struct dentry *root)
0495 {
0496 struct hpfs_sb_info *sbi = hpfs_sb(root->d_sb);
0497
0498 seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, sbi->sb_uid));
0499 seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, sbi->sb_gid));
0500 seq_printf(seq, ",umask=%03o", (~sbi->sb_mode & 0777));
0501 if (sbi->sb_lowercase)
0502 seq_printf(seq, ",case=lower");
0503 if (!sbi->sb_chk)
0504 seq_printf(seq, ",check=none");
0505 if (sbi->sb_chk == 2)
0506 seq_printf(seq, ",check=strict");
0507 if (!sbi->sb_err)
0508 seq_printf(seq, ",errors=continue");
0509 if (sbi->sb_err == 2)
0510 seq_printf(seq, ",errors=panic");
0511 if (!sbi->sb_chkdsk)
0512 seq_printf(seq, ",chkdsk=no");
0513 if (sbi->sb_chkdsk == 2)
0514 seq_printf(seq, ",chkdsk=always");
0515 if (!sbi->sb_eas)
0516 seq_printf(seq, ",eas=no");
0517 if (sbi->sb_eas == 1)
0518 seq_printf(seq, ",eas=ro");
0519 if (sbi->sb_timeshift)
0520 seq_printf(seq, ",timeshift=%d", sbi->sb_timeshift);
0521 return 0;
0522 }
0523
0524
0525
0526 static const struct super_operations hpfs_sops =
0527 {
0528 .alloc_inode = hpfs_alloc_inode,
0529 .free_inode = hpfs_free_inode,
0530 .evict_inode = hpfs_evict_inode,
0531 .put_super = hpfs_put_super,
0532 .statfs = hpfs_statfs,
0533 .remount_fs = hpfs_remount_fs,
0534 .show_options = hpfs_show_options,
0535 };
0536
0537 static int hpfs_fill_super(struct super_block *s, void *options, int silent)
0538 {
0539 struct buffer_head *bh0, *bh1, *bh2;
0540 struct hpfs_boot_block *bootblock;
0541 struct hpfs_super_block *superblock;
0542 struct hpfs_spare_block *spareblock;
0543 struct hpfs_sb_info *sbi;
0544 struct inode *root;
0545
0546 kuid_t uid;
0547 kgid_t gid;
0548 umode_t umask;
0549 int lowercase, eas, chk, errs, chkdsk, timeshift;
0550
0551 dnode_secno root_dno;
0552 struct hpfs_dirent *de = NULL;
0553 struct quad_buffer_head qbh;
0554
0555 int o;
0556
0557 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
0558 if (!sbi) {
0559 return -ENOMEM;
0560 }
0561 s->s_fs_info = sbi;
0562
0563 mutex_init(&sbi->hpfs_mutex);
0564 hpfs_lock(s);
0565
0566 uid = current_uid();
0567 gid = current_gid();
0568 umask = current_umask();
0569 lowercase = 0;
0570 eas = 2;
0571 chk = 1;
0572 errs = 1;
0573 chkdsk = 1;
0574 timeshift = 0;
0575
0576 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase,
0577 &eas, &chk, &errs, &chkdsk, ×hift))) {
0578 pr_err("bad mount options.\n");
0579 goto bail0;
0580 }
0581 if (o==2) {
0582 hpfs_help();
0583 goto bail0;
0584 }
0585
0586
0587 sb_set_blocksize(s, 512);
0588 sbi->sb_fs_size = -1;
0589 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
0590 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
0591 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
0592
0593
0594 if (
0595 le32_to_cpu(superblock->magic) != SB_MAGIC
0596 || le32_to_cpu(spareblock->magic) != SP_MAGIC) {
0597 if (!silent)
0598 pr_err("Bad magic ... probably not HPFS\n");
0599 goto bail4;
0600 }
0601
0602
0603 if (!sb_rdonly(s) && superblock->funcversion != 2 && superblock->funcversion != 3) {
0604 pr_err("Bad version %d,%d. Mount readonly to go around\n",
0605 (int)superblock->version, (int)superblock->funcversion);
0606 pr_err("please try recent version of HPFS driver at http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi and if it still can't understand this format, contact author - mikulas@artax.karlin.mff.cuni.cz\n");
0607 goto bail4;
0608 }
0609
0610 s->s_flags |= SB_NOATIME;
0611
0612
0613 s->s_magic = HPFS_SUPER_MAGIC;
0614 s->s_op = &hpfs_sops;
0615 s->s_d_op = &hpfs_dentry_operations;
0616 s->s_time_min = local_to_gmt(s, 0);
0617 s->s_time_max = local_to_gmt(s, U32_MAX);
0618
0619 sbi->sb_root = le32_to_cpu(superblock->root);
0620 sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors);
0621 sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps);
0622 sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start);
0623 sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band);
0624 sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap);
0625 sbi->sb_uid = uid;
0626 sbi->sb_gid = gid;
0627 sbi->sb_mode = 0777 & ~umask;
0628 sbi->sb_n_free = -1;
0629 sbi->sb_n_free_dnodes = -1;
0630 sbi->sb_lowercase = lowercase;
0631 sbi->sb_eas = eas;
0632 sbi->sb_chk = chk;
0633 sbi->sb_chkdsk = chkdsk;
0634 sbi->sb_err = errs;
0635 sbi->sb_timeshift = timeshift;
0636 sbi->sb_was_error = 0;
0637 sbi->sb_cp_table = NULL;
0638 sbi->sb_c_bitmap = -1;
0639 sbi->sb_max_fwd_alloc = 0xffffff;
0640
0641 if (sbi->sb_fs_size >= 0x80000000) {
0642 hpfs_error(s, "invalid size in superblock: %08x",
0643 (unsigned)sbi->sb_fs_size);
0644 goto bail4;
0645 }
0646
0647 if (spareblock->n_spares_used)
0648 hpfs_load_hotfix_map(s, spareblock);
0649
0650
0651 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps))))
0652 goto bail4;
0653
0654
0655 if (spareblock->dirty && !spareblock->old_wrote) {
0656 if (errs == 2) {
0657 pr_err("Improperly stopped, not mounted\n");
0658 goto bail4;
0659 }
0660 hpfs_error(s, "improperly stopped");
0661 }
0662
0663 if (!sb_rdonly(s)) {
0664 spareblock->dirty = 1;
0665 spareblock->old_wrote = 0;
0666 mark_buffer_dirty(bh2);
0667 }
0668
0669 if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) {
0670 if (errs >= 2) {
0671 pr_err("Spare dnodes used, try chkdsk\n");
0672 mark_dirty(s, 0);
0673 goto bail4;
0674 }
0675 hpfs_error(s, "warning: spare dnodes used, try chkdsk");
0676 if (errs == 0)
0677 pr_err("Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
0678 }
0679 if (chk) {
0680 unsigned a;
0681 if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) ||
0682 le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) {
0683 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
0684 le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band));
0685 goto bail4;
0686 }
0687 a = sbi->sb_dirband_size;
0688 sbi->sb_dirband_size = 0;
0689 if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") ||
0690 hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") ||
0691 hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) {
0692 mark_dirty(s, 0);
0693 goto bail4;
0694 }
0695 sbi->sb_dirband_size = a;
0696 } else
0697 pr_err("You really don't want any checks? You are crazy...\n");
0698
0699
0700 if (le32_to_cpu(spareblock->n_code_pages))
0701 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir))))
0702 pr_err("code page support is disabled\n");
0703
0704 brelse(bh2);
0705 brelse(bh1);
0706 brelse(bh0);
0707
0708 root = iget_locked(s, sbi->sb_root);
0709 if (!root)
0710 goto bail0;
0711 hpfs_init_inode(root);
0712 hpfs_read_inode(root);
0713 unlock_new_inode(root);
0714 s->s_root = d_make_root(root);
0715 if (!s->s_root)
0716 goto bail0;
0717
0718
0719
0720
0721
0722 root_dno = hpfs_fnode_dno(s, sbi->sb_root);
0723 if (root_dno)
0724 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
0725 if (!de)
0726 hpfs_error(s, "unable to find root dir");
0727 else {
0728 root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date));
0729 root->i_atime.tv_nsec = 0;
0730 root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date));
0731 root->i_mtime.tv_nsec = 0;
0732 root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date));
0733 root->i_ctime.tv_nsec = 0;
0734 hpfs_i(root)->i_ea_size = le32_to_cpu(de->ea_size);
0735 hpfs_i(root)->i_parent_dir = root->i_ino;
0736 if (root->i_size == -1)
0737 root->i_size = 2048;
0738 if (root->i_blocks == -1)
0739 root->i_blocks = 5;
0740 hpfs_brelse4(&qbh);
0741 }
0742 hpfs_unlock(s);
0743 return 0;
0744
0745 bail4: brelse(bh2);
0746 bail3: brelse(bh1);
0747 bail2: brelse(bh0);
0748 bail1:
0749 bail0:
0750 hpfs_unlock(s);
0751 free_sbi(sbi);
0752 return -EINVAL;
0753 }
0754
0755 static struct dentry *hpfs_mount(struct file_system_type *fs_type,
0756 int flags, const char *dev_name, void *data)
0757 {
0758 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super);
0759 }
0760
0761 static struct file_system_type hpfs_fs_type = {
0762 .owner = THIS_MODULE,
0763 .name = "hpfs",
0764 .mount = hpfs_mount,
0765 .kill_sb = kill_block_super,
0766 .fs_flags = FS_REQUIRES_DEV,
0767 };
0768 MODULE_ALIAS_FS("hpfs");
0769
0770 static int __init init_hpfs_fs(void)
0771 {
0772 int err = init_inodecache();
0773 if (err)
0774 goto out1;
0775 err = register_filesystem(&hpfs_fs_type);
0776 if (err)
0777 goto out;
0778 return 0;
0779 out:
0780 destroy_inodecache();
0781 out1:
0782 return err;
0783 }
0784
0785 static void __exit exit_hpfs_fs(void)
0786 {
0787 unregister_filesystem(&hpfs_fs_type);
0788 destroy_inodecache();
0789 }
0790
0791 module_init(init_hpfs_fs)
0792 module_exit(exit_hpfs_fs)
0793 MODULE_LICENSE("GPL");
