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10#include "hpfs_fn.h"
11#include <linux/module.h>
12#include <linux/parser.h>
13#include <linux/init.h>
14#include <linux/statfs.h>
15#include <linux/magic.h>
16#include <linux/sched.h>
17#include <linux/bitmap.h>
18#include <linux/slab.h>
19#include <linux/seq_file.h>
20
21
22
23static void mark_dirty(struct super_block *s, int remount)
24{
25 if (hpfs_sb(s)->sb_chkdsk && (remount || !sb_rdonly(s))) {
26 struct buffer_head *bh;
27 struct hpfs_spare_block *sb;
28 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
29 sb->dirty = 1;
30 sb->old_wrote = 0;
31 mark_buffer_dirty(bh);
32 sync_dirty_buffer(bh);
33 brelse(bh);
34 }
35 }
36}
37
38
39
40
41static void unmark_dirty(struct super_block *s)
42{
43 struct buffer_head *bh;
44 struct hpfs_spare_block *sb;
45 if (sb_rdonly(s)) return;
46 sync_blockdev(s->s_bdev);
47 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
48 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error;
49 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error;
50 mark_buffer_dirty(bh);
51 sync_dirty_buffer(bh);
52 brelse(bh);
53 }
54}
55
56
57void hpfs_error(struct super_block *s, const char *fmt, ...)
58{
59 struct va_format vaf;
60 va_list args;
61
62 va_start(args, fmt);
63
64 vaf.fmt = fmt;
65 vaf.va = &args;
66
67 pr_err("filesystem error: %pV", &vaf);
68
69 va_end(args);
70
71 if (!hpfs_sb(s)->sb_was_error) {
72 if (hpfs_sb(s)->sb_err == 2) {
73 pr_cont("; crashing the system because you wanted it\n");
74 mark_dirty(s, 0);
75 panic("HPFS panic");
76 } else if (hpfs_sb(s)->sb_err == 1) {
77 if (sb_rdonly(s))
78 pr_cont("; already mounted read-only\n");
79 else {
80 pr_cont("; remounting read-only\n");
81 mark_dirty(s, 0);
82 s->s_flags |= SB_RDONLY;
83 }
84 } else if (sb_rdonly(s))
85 pr_cont("; going on - but anything won't be destroyed because it's read-only\n");
86 else
87 pr_cont("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n");
88 } else
89 pr_cont("\n");
90 hpfs_sb(s)->sb_was_error = 1;
91}
92
93
94
95
96
97
98
99
100
101int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
102 char *msg)
103{
104 if (*c2 && *c1 == key) {
105 hpfs_error(s, "cycle detected on key %08x in %s", key, msg);
106 return 1;
107 }
108 (*c2)++;
109 if (!((*c2 - 1) & *c2)) *c1 = key;
110 return 0;
111}
112
113static void free_sbi(struct hpfs_sb_info *sbi)
114{
115 kfree(sbi->sb_cp_table);
116 kfree(sbi->sb_bmp_dir);
117 kfree(sbi);
118}
119
120static void lazy_free_sbi(struct rcu_head *rcu)
121{
122 free_sbi(container_of(rcu, struct hpfs_sb_info, rcu));
123}
124
125static void hpfs_put_super(struct super_block *s)
126{
127 hpfs_lock(s);
128 unmark_dirty(s);
129 hpfs_unlock(s);
130 call_rcu(&hpfs_sb(s)->rcu, lazy_free_sbi);
131}
132
133static unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
134{
135 struct quad_buffer_head qbh;
136 unsigned long *bits;
137 unsigned count;
138
139 bits = hpfs_map_4sectors(s, secno, &qbh, 0);
140 if (!bits)
141 return (unsigned)-1;
142 count = bitmap_weight(bits, 2048 * BITS_PER_BYTE);
143 hpfs_brelse4(&qbh);
144 return count;
145}
146
147static unsigned count_bitmaps(struct super_block *s)
148{
149 unsigned n, count, n_bands;
150 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
151 count = 0;
152 for (n = 0; n < COUNT_RD_AHEAD; n++) {
153 hpfs_prefetch_bitmap(s, n);
154 }
155 for (n = 0; n < n_bands; n++) {
156 unsigned c;
157 hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD);
158 c = hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n]));
159 if (c != (unsigned)-1)
160 count += c;
161 }
162 return count;
163}
164
165unsigned hpfs_get_free_dnodes(struct super_block *s)
166{
167 struct hpfs_sb_info *sbi = hpfs_sb(s);
168 if (sbi->sb_n_free_dnodes == (unsigned)-1) {
169 unsigned c = hpfs_count_one_bitmap(s, sbi->sb_dmap);
170 if (c == (unsigned)-1)
171 return 0;
172 sbi->sb_n_free_dnodes = c;
173 }
174 return sbi->sb_n_free_dnodes;
175}
176
177static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
178{
179 struct super_block *s = dentry->d_sb;
180 struct hpfs_sb_info *sbi = hpfs_sb(s);
181 u64 id = huge_encode_dev(s->s_bdev->bd_dev);
182
183 hpfs_lock(s);
184
185 if (sbi->sb_n_free == (unsigned)-1)
186 sbi->sb_n_free = count_bitmaps(s);
187
188 buf->f_type = s->s_magic;
189 buf->f_bsize = 512;
190 buf->f_blocks = sbi->sb_fs_size;
191 buf->f_bfree = sbi->sb_n_free;
192 buf->f_bavail = sbi->sb_n_free;
193 buf->f_files = sbi->sb_dirband_size / 4;
194 buf->f_ffree = hpfs_get_free_dnodes(s);
195 buf->f_fsid.val[0] = (u32)id;
196 buf->f_fsid.val[1] = (u32)(id >> 32);
197 buf->f_namelen = 254;
198
199 hpfs_unlock(s);
200
201 return 0;
202}
203
204
205long hpfs_ioctl(struct file *file, unsigned cmd, unsigned long arg)
206{
207 switch (cmd) {
208 case FITRIM: {
209 struct fstrim_range range;
210 secno n_trimmed;
211 int r;
212 if (!capable(CAP_SYS_ADMIN))
213 return -EPERM;
214 if (copy_from_user(&range, (struct fstrim_range __user *)arg, sizeof(range)))
215 return -EFAULT;
216 r = hpfs_trim_fs(file_inode(file)->i_sb, range.start >> 9, (range.start + range.len) >> 9, (range.minlen + 511) >> 9, &n_trimmed);
217 if (r)
218 return r;
219 range.len = (u64)n_trimmed << 9;
220 if (copy_to_user((struct fstrim_range __user *)arg, &range, sizeof(range)))
221 return -EFAULT;
222 return 0;
223 }
224 default: {
225 return -ENOIOCTLCMD;
226 }
227 }
228}
229
230
231static struct kmem_cache * hpfs_inode_cachep;
232
233static struct inode *hpfs_alloc_inode(struct super_block *sb)
234{
235 struct hpfs_inode_info *ei;
236 ei = kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS);
237 if (!ei)
238 return NULL;
239 return &ei->vfs_inode;
240}
241
242static void hpfs_free_inode(struct inode *inode)
243{
244 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
245}
246
247static void init_once(void *foo)
248{
249 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
250
251 inode_init_once(&ei->vfs_inode);
252}
253
254static int init_inodecache(void)
255{
256 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache",
257 sizeof(struct hpfs_inode_info),
258 0, (SLAB_RECLAIM_ACCOUNT|
259 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
260 init_once);
261 if (hpfs_inode_cachep == NULL)
262 return -ENOMEM;
263 return 0;
264}
265
266static void destroy_inodecache(void)
267{
268
269
270
271
272 rcu_barrier();
273 kmem_cache_destroy(hpfs_inode_cachep);
274}
275
276
277
278
279
280
281
282enum {
283 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis,
284 Opt_check_none, Opt_check_normal, Opt_check_strict,
285 Opt_err_cont, Opt_err_ro, Opt_err_panic,
286 Opt_eas_no, Opt_eas_ro, Opt_eas_rw,
287 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always,
288 Opt_timeshift, Opt_err,
289};
290
291static const match_table_t tokens = {
292 {Opt_help, "help"},
293 {Opt_uid, "uid=%u"},
294 {Opt_gid, "gid=%u"},
295 {Opt_umask, "umask=%o"},
296 {Opt_case_lower, "case=lower"},
297 {Opt_case_asis, "case=asis"},
298 {Opt_check_none, "check=none"},
299 {Opt_check_normal, "check=normal"},
300 {Opt_check_strict, "check=strict"},
301 {Opt_err_cont, "errors=continue"},
302 {Opt_err_ro, "errors=remount-ro"},
303 {Opt_err_panic, "errors=panic"},
304 {Opt_eas_no, "eas=no"},
305 {Opt_eas_ro, "eas=ro"},
306 {Opt_eas_rw, "eas=rw"},
307 {Opt_chkdsk_no, "chkdsk=no"},
308 {Opt_chkdsk_errors, "chkdsk=errors"},
309 {Opt_chkdsk_always, "chkdsk=always"},
310 {Opt_timeshift, "timeshift=%d"},
311 {Opt_err, NULL},
312};
313
314static int parse_opts(char *opts, kuid_t *uid, kgid_t *gid, umode_t *umask,
315 int *lowercase, int *eas, int *chk, int *errs,
316 int *chkdsk, int *timeshift)
317{
318 char *p;
319 int option;
320
321 if (!opts)
322 return 1;
323
324
325
326 while ((p = strsep(&opts, ",")) != NULL) {
327 substring_t args[MAX_OPT_ARGS];
328 int token;
329 if (!*p)
330 continue;
331
332 token = match_token(p, tokens, args);
333 switch (token) {
334 case Opt_help:
335 return 2;
336 case Opt_uid:
337 if (match_int(args, &option))
338 return 0;
339 *uid = make_kuid(current_user_ns(), option);
340 if (!uid_valid(*uid))
341 return 0;
342 break;
343 case Opt_gid:
344 if (match_int(args, &option))
345 return 0;
346 *gid = make_kgid(current_user_ns(), option);
347 if (!gid_valid(*gid))
348 return 0;
349 break;
350 case Opt_umask:
351 if (match_octal(args, &option))
352 return 0;
353 *umask = option;
354 break;
355 case Opt_case_lower:
356 *lowercase = 1;
357 break;
358 case Opt_case_asis:
359 *lowercase = 0;
360 break;
361 case Opt_check_none:
362 *chk = 0;
363 break;
364 case Opt_check_normal:
365 *chk = 1;
366 break;
367 case Opt_check_strict:
368 *chk = 2;
369 break;
370 case Opt_err_cont:
371 *errs = 0;
372 break;
373 case Opt_err_ro:
374 *errs = 1;
375 break;
376 case Opt_err_panic:
377 *errs = 2;
378 break;
379 case Opt_eas_no:
380 *eas = 0;
381 break;
382 case Opt_eas_ro:
383 *eas = 1;
384 break;
385 case Opt_eas_rw:
386 *eas = 2;
387 break;
388 case Opt_chkdsk_no:
389 *chkdsk = 0;
390 break;
391 case Opt_chkdsk_errors:
392 *chkdsk = 1;
393 break;
394 case Opt_chkdsk_always:
395 *chkdsk = 2;
396 break;
397 case Opt_timeshift:
398 {
399 int m = 1;
400 char *rhs = args[0].from;
401 if (!rhs || !*rhs)
402 return 0;
403 if (*rhs == '-') m = -1;
404 if (*rhs == '+' || *rhs == '-') rhs++;
405 *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
406 if (*rhs)
407 return 0;
408 break;
409 }
410 default:
411 return 0;
412 }
413 }
414 return 1;
415}
416
417static inline void hpfs_help(void)
418{
419 pr_info("\n\
420HPFS filesystem options:\n\
421 help do not mount and display this text\n\
422 uid=xxx set uid of files that don't have uid specified in eas\n\
423 gid=xxx set gid of files that don't have gid specified in eas\n\
424 umask=xxx set mode of files that don't have mode specified in eas\n\
425 case=lower lowercase all files\n\
426 case=asis do not lowercase files (default)\n\
427 check=none no fs checks - kernel may crash on corrupted filesystem\n\
428 check=normal do some checks - it should not crash (default)\n\
429 check=strict do extra time-consuming checks, used for debugging\n\
430 errors=continue continue on errors\n\
431 errors=remount-ro remount read-only if errors found (default)\n\
432 errors=panic panic on errors\n\
433 chkdsk=no do not mark fs for chkdsking even if there were errors\n\
434 chkdsk=errors mark fs dirty if errors found (default)\n\
435 chkdsk=always always mark fs dirty - used for debugging\n\
436 eas=no ignore extended attributes\n\
437 eas=ro read but do not write extended attributes\n\
438 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
439 timeshift=nnn add nnn seconds to file times\n\
440\n");
441}
442
443static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
444{
445 kuid_t uid;
446 kgid_t gid;
447 umode_t umask;
448 int lowercase, eas, chk, errs, chkdsk, timeshift;
449 int o;
450 struct hpfs_sb_info *sbi = hpfs_sb(s);
451
452 sync_filesystem(s);
453
454 *flags |= SB_NOATIME;
455
456 hpfs_lock(s);
457 uid = sbi->sb_uid; gid = sbi->sb_gid;
458 umask = 0777 & ~sbi->sb_mode;
459 lowercase = sbi->sb_lowercase;
460 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk;
461 errs = sbi->sb_err; timeshift = sbi->sb_timeshift;
462
463 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase,
464 &eas, &chk, &errs, &chkdsk, ×hift))) {
465 pr_err("bad mount options.\n");
466 goto out_err;
467 }
468 if (o == 2) {
469 hpfs_help();
470 goto out_err;
471 }
472 if (timeshift != sbi->sb_timeshift) {
473 pr_err("timeshift can't be changed using remount.\n");
474 goto out_err;
475 }
476
477 unmark_dirty(s);
478
479 sbi->sb_uid = uid; sbi->sb_gid = gid;
480 sbi->sb_mode = 0777 & ~umask;
481 sbi->sb_lowercase = lowercase;
482 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk;
483 sbi->sb_err = errs; sbi->sb_timeshift = timeshift;
484
485 if (!(*flags & SB_RDONLY)) mark_dirty(s, 1);
486
487 hpfs_unlock(s);
488 return 0;
489
490out_err:
491 hpfs_unlock(s);
492 return -EINVAL;
493}
494
495static int hpfs_show_options(struct seq_file *seq, struct dentry *root)
496{
497 struct hpfs_sb_info *sbi = hpfs_sb(root->d_sb);
498
499 seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, sbi->sb_uid));
500 seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, sbi->sb_gid));
501 seq_printf(seq, ",umask=%03o", (~sbi->sb_mode & 0777));
502 if (sbi->sb_lowercase)
503 seq_printf(seq, ",case=lower");
504 if (!sbi->sb_chk)
505 seq_printf(seq, ",check=none");
506 if (sbi->sb_chk == 2)
507 seq_printf(seq, ",check=strict");
508 if (!sbi->sb_err)
509 seq_printf(seq, ",errors=continue");
510 if (sbi->sb_err == 2)
511 seq_printf(seq, ",errors=panic");
512 if (!sbi->sb_chkdsk)
513 seq_printf(seq, ",chkdsk=no");
514 if (sbi->sb_chkdsk == 2)
515 seq_printf(seq, ",chkdsk=always");
516 if (!sbi->sb_eas)
517 seq_printf(seq, ",eas=no");
518 if (sbi->sb_eas == 1)
519 seq_printf(seq, ",eas=ro");
520 if (sbi->sb_timeshift)
521 seq_printf(seq, ",timeshift=%d", sbi->sb_timeshift);
522 return 0;
523}
524
525
526
527static const struct super_operations hpfs_sops =
528{
529 .alloc_inode = hpfs_alloc_inode,
530 .free_inode = hpfs_free_inode,
531 .evict_inode = hpfs_evict_inode,
532 .put_super = hpfs_put_super,
533 .statfs = hpfs_statfs,
534 .remount_fs = hpfs_remount_fs,
535 .show_options = hpfs_show_options,
536};
537
538static int hpfs_fill_super(struct super_block *s, void *options, int silent)
539{
540 struct buffer_head *bh0, *bh1, *bh2;
541 struct hpfs_boot_block *bootblock;
542 struct hpfs_super_block *superblock;
543 struct hpfs_spare_block *spareblock;
544 struct hpfs_sb_info *sbi;
545 struct inode *root;
546
547 kuid_t uid;
548 kgid_t gid;
549 umode_t umask;
550 int lowercase, eas, chk, errs, chkdsk, timeshift;
551
552 dnode_secno root_dno;
553 struct hpfs_dirent *de = NULL;
554 struct quad_buffer_head qbh;
555
556 int o;
557
558 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
559 if (!sbi) {
560 return -ENOMEM;
561 }
562 s->s_fs_info = sbi;
563
564 mutex_init(&sbi->hpfs_mutex);
565 hpfs_lock(s);
566
567 uid = current_uid();
568 gid = current_gid();
569 umask = current_umask();
570 lowercase = 0;
571 eas = 2;
572 chk = 1;
573 errs = 1;
574 chkdsk = 1;
575 timeshift = 0;
576
577 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase,
578 &eas, &chk, &errs, &chkdsk, ×hift))) {
579 pr_err("bad mount options.\n");
580 goto bail0;
581 }
582 if (o==2) {
583 hpfs_help();
584 goto bail0;
585 }
586
587
588 sb_set_blocksize(s, 512);
589 sbi->sb_fs_size = -1;
590 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
591 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
592 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
593
594
595 if (
596 le32_to_cpu(superblock->magic) != SB_MAGIC
597 || le32_to_cpu(spareblock->magic) != SP_MAGIC) {
598 if (!silent)
599 pr_err("Bad magic ... probably not HPFS\n");
600 goto bail4;
601 }
602
603
604 if (!sb_rdonly(s) && superblock->funcversion != 2 && superblock->funcversion != 3) {
605 pr_err("Bad version %d,%d. Mount readonly to go around\n",
606 (int)superblock->version, (int)superblock->funcversion);
607 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");
608 goto bail4;
609 }
610
611 s->s_flags |= SB_NOATIME;
612
613
614 s->s_magic = HPFS_SUPER_MAGIC;
615 s->s_op = &hpfs_sops;
616 s->s_d_op = &hpfs_dentry_operations;
617
618 sbi->sb_root = le32_to_cpu(superblock->root);
619 sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors);
620 sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps);
621 sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start);
622 sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band);
623 sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap);
624 sbi->sb_uid = uid;
625 sbi->sb_gid = gid;
626 sbi->sb_mode = 0777 & ~umask;
627 sbi->sb_n_free = -1;
628 sbi->sb_n_free_dnodes = -1;
629 sbi->sb_lowercase = lowercase;
630 sbi->sb_eas = eas;
631 sbi->sb_chk = chk;
632 sbi->sb_chkdsk = chkdsk;
633 sbi->sb_err = errs;
634 sbi->sb_timeshift = timeshift;
635 sbi->sb_was_error = 0;
636 sbi->sb_cp_table = NULL;
637 sbi->sb_c_bitmap = -1;
638 sbi->sb_max_fwd_alloc = 0xffffff;
639
640 if (sbi->sb_fs_size >= 0x80000000) {
641 hpfs_error(s, "invalid size in superblock: %08x",
642 (unsigned)sbi->sb_fs_size);
643 goto bail4;
644 }
645
646 if (spareblock->n_spares_used)
647 hpfs_load_hotfix_map(s, spareblock);
648
649
650 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps))))
651 goto bail4;
652
653
654 if (spareblock->dirty && !spareblock->old_wrote) {
655 if (errs == 2) {
656 pr_err("Improperly stopped, not mounted\n");
657 goto bail4;
658 }
659 hpfs_error(s, "improperly stopped");
660 }
661
662 if (!sb_rdonly(s)) {
663 spareblock->dirty = 1;
664 spareblock->old_wrote = 0;
665 mark_buffer_dirty(bh2);
666 }
667
668 if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) {
669 if (errs >= 2) {
670 pr_err("Spare dnodes used, try chkdsk\n");
671 mark_dirty(s, 0);
672 goto bail4;
673 }
674 hpfs_error(s, "warning: spare dnodes used, try chkdsk");
675 if (errs == 0)
676 pr_err("Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
677 }
678 if (chk) {
679 unsigned a;
680 if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) ||
681 le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) {
682 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
683 le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band));
684 goto bail4;
685 }
686 a = sbi->sb_dirband_size;
687 sbi->sb_dirband_size = 0;
688 if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") ||
689 hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") ||
690 hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) {
691 mark_dirty(s, 0);
692 goto bail4;
693 }
694 sbi->sb_dirband_size = a;
695 } else
696 pr_err("You really don't want any checks? You are crazy...\n");
697
698
699 if (le32_to_cpu(spareblock->n_code_pages))
700 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir))))
701 pr_err("code page support is disabled\n");
702
703 brelse(bh2);
704 brelse(bh1);
705 brelse(bh0);
706
707 root = iget_locked(s, sbi->sb_root);
708 if (!root)
709 goto bail0;
710 hpfs_init_inode(root);
711 hpfs_read_inode(root);
712 unlock_new_inode(root);
713 s->s_root = d_make_root(root);
714 if (!s->s_root)
715 goto bail0;
716
717
718
719
720
721 root_dno = hpfs_fnode_dno(s, sbi->sb_root);
722 if (root_dno)
723 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
724 if (!de)
725 hpfs_error(s, "unable to find root dir");
726 else {
727 root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date));
728 root->i_atime.tv_nsec = 0;
729 root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date));
730 root->i_mtime.tv_nsec = 0;
731 root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date));
732 root->i_ctime.tv_nsec = 0;
733 hpfs_i(root)->i_ea_size = le32_to_cpu(de->ea_size);
734 hpfs_i(root)->i_parent_dir = root->i_ino;
735 if (root->i_size == -1)
736 root->i_size = 2048;
737 if (root->i_blocks == -1)
738 root->i_blocks = 5;
739 hpfs_brelse4(&qbh);
740 }
741 hpfs_unlock(s);
742 return 0;
743
744bail4: brelse(bh2);
745bail3: brelse(bh1);
746bail2: brelse(bh0);
747bail1:
748bail0:
749 hpfs_unlock(s);
750 free_sbi(sbi);
751 return -EINVAL;
752}
753
754static struct dentry *hpfs_mount(struct file_system_type *fs_type,
755 int flags, const char *dev_name, void *data)
756{
757 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super);
758}
759
760static struct file_system_type hpfs_fs_type = {
761 .owner = THIS_MODULE,
762 .name = "hpfs",
763 .mount = hpfs_mount,
764 .kill_sb = kill_block_super,
765 .fs_flags = FS_REQUIRES_DEV,
766};
767MODULE_ALIAS_FS("hpfs");
768
769static int __init init_hpfs_fs(void)
770{
771 int err = init_inodecache();
772 if (err)
773 goto out1;
774 err = register_filesystem(&hpfs_fs_type);
775 if (err)
776 goto out;
777 return 0;
778out:
779 destroy_inodecache();
780out1:
781 return err;
782}
783
784static void __exit exit_hpfs_fs(void)
785{
786 unregister_filesystem(&hpfs_fs_type);
787 destroy_inodecache();
788}
789
790module_init(init_hpfs_fs)
791module_exit(exit_hpfs_fs)
792MODULE_LICENSE("GPL");
793
