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8
9#include "hpfs_fn.h"
10#include <linux/module.h>
11#include <linux/parser.h>
12#include <linux/init.h>
13#include <linux/statfs.h>
14#include <linux/magic.h>
15#include <linux/sched.h>
16#include <linux/bitmap.h>
17#include <linux/slab.h>
18
19
20
21static void mark_dirty(struct super_block *s, int remount)
22{
23 if (hpfs_sb(s)->sb_chkdsk && (remount || !(s->s_flags & MS_RDONLY))) {
24 struct buffer_head *bh;
25 struct hpfs_spare_block *sb;
26 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
27 sb->dirty = 1;
28 sb->old_wrote = 0;
29 mark_buffer_dirty(bh);
30 sync_dirty_buffer(bh);
31 brelse(bh);
32 }
33 }
34}
35
36
37
38
39static void unmark_dirty(struct super_block *s)
40{
41 struct buffer_head *bh;
42 struct hpfs_spare_block *sb;
43 if (s->s_flags & MS_RDONLY) return;
44 sync_blockdev(s->s_bdev);
45 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
46 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error;
47 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error;
48 mark_buffer_dirty(bh);
49 sync_dirty_buffer(bh);
50 brelse(bh);
51 }
52}
53
54
55static char err_buf[1024];
56
57void hpfs_error(struct super_block *s, const char *fmt, ...)
58{
59 va_list args;
60
61 va_start(args, fmt);
62 vsnprintf(err_buf, sizeof(err_buf), fmt, args);
63 va_end(args);
64
65 pr_err("filesystem error: %s", err_buf);
66 if (!hpfs_sb(s)->sb_was_error) {
67 if (hpfs_sb(s)->sb_err == 2) {
68 pr_cont("; crashing the system because you wanted it\n");
69 mark_dirty(s, 0);
70 panic("HPFS panic");
71 } else if (hpfs_sb(s)->sb_err == 1) {
72 if (s->s_flags & MS_RDONLY)
73 pr_cont("; already mounted read-only\n");
74 else {
75 pr_cont("; remounting read-only\n");
76 mark_dirty(s, 0);
77 s->s_flags |= MS_RDONLY;
78 }
79 } else if (s->s_flags & MS_RDONLY)
80 pr_cont("; going on - but anything won't be destroyed because it's read-only\n");
81 else
82 pr_cont("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n");
83 } else
84 pr_cont("\n");
85 hpfs_sb(s)->sb_was_error = 1;
86}
87
88
89
90
91
92
93
94
95
96int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
97 char *msg)
98{
99 if (*c2 && *c1 == key) {
100 hpfs_error(s, "cycle detected on key %08x in %s", key, msg);
101 return 1;
102 }
103 (*c2)++;
104 if (!((*c2 - 1) & *c2)) *c1 = key;
105 return 0;
106}
107
108static void free_sbi(struct hpfs_sb_info *sbi)
109{
110 kfree(sbi->sb_cp_table);
111 kfree(sbi->sb_bmp_dir);
112 kfree(sbi);
113}
114
115static void lazy_free_sbi(struct rcu_head *rcu)
116{
117 free_sbi(container_of(rcu, struct hpfs_sb_info, rcu));
118}
119
120static void hpfs_put_super(struct super_block *s)
121{
122 hpfs_lock(s);
123 unmark_dirty(s);
124 hpfs_unlock(s);
125 call_rcu(&hpfs_sb(s)->rcu, lazy_free_sbi);
126}
127
128static unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
129{
130 struct quad_buffer_head qbh;
131 unsigned long *bits;
132 unsigned count;
133
134 bits = hpfs_map_4sectors(s, secno, &qbh, 0);
135 if (!bits)
136 return (unsigned)-1;
137 count = bitmap_weight(bits, 2048 * BITS_PER_BYTE);
138 hpfs_brelse4(&qbh);
139 return count;
140}
141
142static unsigned count_bitmaps(struct super_block *s)
143{
144 unsigned n, count, n_bands;
145 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
146 count = 0;
147 for (n = 0; n < COUNT_RD_AHEAD; n++) {
148 hpfs_prefetch_bitmap(s, n);
149 }
150 for (n = 0; n < n_bands; n++) {
151 unsigned c;
152 hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD);
153 c = hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n]));
154 if (c != (unsigned)-1)
155 count += c;
156 }
157 return count;
158}
159
160unsigned hpfs_get_free_dnodes(struct super_block *s)
161{
162 struct hpfs_sb_info *sbi = hpfs_sb(s);
163 if (sbi->sb_n_free_dnodes == (unsigned)-1) {
164 unsigned c = hpfs_count_one_bitmap(s, sbi->sb_dmap);
165 if (c == (unsigned)-1)
166 return 0;
167 sbi->sb_n_free_dnodes = c;
168 }
169 return sbi->sb_n_free_dnodes;
170}
171
172static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
173{
174 struct super_block *s = dentry->d_sb;
175 struct hpfs_sb_info *sbi = hpfs_sb(s);
176 u64 id = huge_encode_dev(s->s_bdev->bd_dev);
177
178 hpfs_lock(s);
179
180 if (sbi->sb_n_free == (unsigned)-1)
181 sbi->sb_n_free = count_bitmaps(s);
182
183 buf->f_type = s->s_magic;
184 buf->f_bsize = 512;
185 buf->f_blocks = sbi->sb_fs_size;
186 buf->f_bfree = sbi->sb_n_free;
187 buf->f_bavail = sbi->sb_n_free;
188 buf->f_files = sbi->sb_dirband_size / 4;
189 buf->f_ffree = hpfs_get_free_dnodes(s);
190 buf->f_fsid.val[0] = (u32)id;
191 buf->f_fsid.val[1] = (u32)(id >> 32);
192 buf->f_namelen = 254;
193
194 hpfs_unlock(s);
195
196 return 0;
197}
198
199static struct kmem_cache * hpfs_inode_cachep;
200
201static struct inode *hpfs_alloc_inode(struct super_block *sb)
202{
203 struct hpfs_inode_info *ei;
204 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS);
205 if (!ei)
206 return NULL;
207 ei->vfs_inode.i_version = 1;
208 return &ei->vfs_inode;
209}
210
211static void hpfs_i_callback(struct rcu_head *head)
212{
213 struct inode *inode = container_of(head, struct inode, i_rcu);
214 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
215}
216
217static void hpfs_destroy_inode(struct inode *inode)
218{
219 call_rcu(&inode->i_rcu, hpfs_i_callback);
220}
221
222static void init_once(void *foo)
223{
224 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
225
226 inode_init_once(&ei->vfs_inode);
227}
228
229static int init_inodecache(void)
230{
231 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache",
232 sizeof(struct hpfs_inode_info),
233 0, (SLAB_RECLAIM_ACCOUNT|
234 SLAB_MEM_SPREAD),
235 init_once);
236 if (hpfs_inode_cachep == NULL)
237 return -ENOMEM;
238 return 0;
239}
240
241static void destroy_inodecache(void)
242{
243
244
245
246
247 rcu_barrier();
248 kmem_cache_destroy(hpfs_inode_cachep);
249}
250
251
252
253
254
255
256
257enum {
258 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis,
259 Opt_check_none, Opt_check_normal, Opt_check_strict,
260 Opt_err_cont, Opt_err_ro, Opt_err_panic,
261 Opt_eas_no, Opt_eas_ro, Opt_eas_rw,
262 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always,
263 Opt_timeshift, Opt_err,
264};
265
266static const match_table_t tokens = {
267 {Opt_help, "help"},
268 {Opt_uid, "uid=%u"},
269 {Opt_gid, "gid=%u"},
270 {Opt_umask, "umask=%o"},
271 {Opt_case_lower, "case=lower"},
272 {Opt_case_asis, "case=asis"},
273 {Opt_check_none, "check=none"},
274 {Opt_check_normal, "check=normal"},
275 {Opt_check_strict, "check=strict"},
276 {Opt_err_cont, "errors=continue"},
277 {Opt_err_ro, "errors=remount-ro"},
278 {Opt_err_panic, "errors=panic"},
279 {Opt_eas_no, "eas=no"},
280 {Opt_eas_ro, "eas=ro"},
281 {Opt_eas_rw, "eas=rw"},
282 {Opt_chkdsk_no, "chkdsk=no"},
283 {Opt_chkdsk_errors, "chkdsk=errors"},
284 {Opt_chkdsk_always, "chkdsk=always"},
285 {Opt_timeshift, "timeshift=%d"},
286 {Opt_err, NULL},
287};
288
289static int parse_opts(char *opts, kuid_t *uid, kgid_t *gid, umode_t *umask,
290 int *lowercase, int *eas, int *chk, int *errs,
291 int *chkdsk, int *timeshift)
292{
293 char *p;
294 int option;
295
296 if (!opts)
297 return 1;
298
299
300
301 while ((p = strsep(&opts, ",")) != NULL) {
302 substring_t args[MAX_OPT_ARGS];
303 int token;
304 if (!*p)
305 continue;
306
307 token = match_token(p, tokens, args);
308 switch (token) {
309 case Opt_help:
310 return 2;
311 case Opt_uid:
312 if (match_int(args, &option))
313 return 0;
314 *uid = make_kuid(current_user_ns(), option);
315 if (!uid_valid(*uid))
316 return 0;
317 break;
318 case Opt_gid:
319 if (match_int(args, &option))
320 return 0;
321 *gid = make_kgid(current_user_ns(), option);
322 if (!gid_valid(*gid))
323 return 0;
324 break;
325 case Opt_umask:
326 if (match_octal(args, &option))
327 return 0;
328 *umask = option;
329 break;
330 case Opt_case_lower:
331 *lowercase = 1;
332 break;
333 case Opt_case_asis:
334 *lowercase = 0;
335 break;
336 case Opt_check_none:
337 *chk = 0;
338 break;
339 case Opt_check_normal:
340 *chk = 1;
341 break;
342 case Opt_check_strict:
343 *chk = 2;
344 break;
345 case Opt_err_cont:
346 *errs = 0;
347 break;
348 case Opt_err_ro:
349 *errs = 1;
350 break;
351 case Opt_err_panic:
352 *errs = 2;
353 break;
354 case Opt_eas_no:
355 *eas = 0;
356 break;
357 case Opt_eas_ro:
358 *eas = 1;
359 break;
360 case Opt_eas_rw:
361 *eas = 2;
362 break;
363 case Opt_chkdsk_no:
364 *chkdsk = 0;
365 break;
366 case Opt_chkdsk_errors:
367 *chkdsk = 1;
368 break;
369 case Opt_chkdsk_always:
370 *chkdsk = 2;
371 break;
372 case Opt_timeshift:
373 {
374 int m = 1;
375 char *rhs = args[0].from;
376 if (!rhs || !*rhs)
377 return 0;
378 if (*rhs == '-') m = -1;
379 if (*rhs == '+' || *rhs == '-') rhs++;
380 *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
381 if (*rhs)
382 return 0;
383 break;
384 }
385 default:
386 return 0;
387 }
388 }
389 return 1;
390}
391
392static inline void hpfs_help(void)
393{
394 pr_info("\n\
395HPFS filesystem options:\n\
396 help do not mount and display this text\n\
397 uid=xxx set uid of files that don't have uid specified in eas\n\
398 gid=xxx set gid of files that don't have gid specified in eas\n\
399 umask=xxx set mode of files that don't have mode specified in eas\n\
400 case=lower lowercase all files\n\
401 case=asis do not lowercase files (default)\n\
402 check=none no fs checks - kernel may crash on corrupted filesystem\n\
403 check=normal do some checks - it should not crash (default)\n\
404 check=strict do extra time-consuming checks, used for debugging\n\
405 errors=continue continue on errors\n\
406 errors=remount-ro remount read-only if errors found (default)\n\
407 errors=panic panic on errors\n\
408 chkdsk=no do not mark fs for chkdsking even if there were errors\n\
409 chkdsk=errors mark fs dirty if errors found (default)\n\
410 chkdsk=always always mark fs dirty - used for debugging\n\
411 eas=no ignore extended attributes\n\
412 eas=ro read but do not write extended attributes\n\
413 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
414 timeshift=nnn add nnn seconds to file times\n\
415\n");
416}
417
418static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
419{
420 kuid_t uid;
421 kgid_t gid;
422 umode_t umask;
423 int lowercase, eas, chk, errs, chkdsk, timeshift;
424 int o;
425 struct hpfs_sb_info *sbi = hpfs_sb(s);
426 char *new_opts = kstrdup(data, GFP_KERNEL);
427
428 sync_filesystem(s);
429
430 *flags |= MS_NOATIME;
431
432 hpfs_lock(s);
433 uid = sbi->sb_uid; gid = sbi->sb_gid;
434 umask = 0777 & ~sbi->sb_mode;
435 lowercase = sbi->sb_lowercase;
436 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk;
437 errs = sbi->sb_err; timeshift = sbi->sb_timeshift;
438
439 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase,
440 &eas, &chk, &errs, &chkdsk, ×hift))) {
441 pr_err("bad mount options.\n");
442 goto out_err;
443 }
444 if (o == 2) {
445 hpfs_help();
446 goto out_err;
447 }
448 if (timeshift != sbi->sb_timeshift) {
449 pr_err("timeshift can't be changed using remount.\n");
450 goto out_err;
451 }
452
453 unmark_dirty(s);
454
455 sbi->sb_uid = uid; sbi->sb_gid = gid;
456 sbi->sb_mode = 0777 & ~umask;
457 sbi->sb_lowercase = lowercase;
458 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk;
459 sbi->sb_err = errs; sbi->sb_timeshift = timeshift;
460
461 if (!(*flags & MS_RDONLY)) mark_dirty(s, 1);
462
463 replace_mount_options(s, new_opts);
464
465 hpfs_unlock(s);
466 return 0;
467
468out_err:
469 hpfs_unlock(s);
470 kfree(new_opts);
471 return -EINVAL;
472}
473
474
475
476static const struct super_operations hpfs_sops =
477{
478 .alloc_inode = hpfs_alloc_inode,
479 .destroy_inode = hpfs_destroy_inode,
480 .evict_inode = hpfs_evict_inode,
481 .put_super = hpfs_put_super,
482 .statfs = hpfs_statfs,
483 .remount_fs = hpfs_remount_fs,
484 .show_options = generic_show_options,
485};
486
487static int hpfs_fill_super(struct super_block *s, void *options, int silent)
488{
489 struct buffer_head *bh0, *bh1, *bh2;
490 struct hpfs_boot_block *bootblock;
491 struct hpfs_super_block *superblock;
492 struct hpfs_spare_block *spareblock;
493 struct hpfs_sb_info *sbi;
494 struct inode *root;
495
496 kuid_t uid;
497 kgid_t gid;
498 umode_t umask;
499 int lowercase, eas, chk, errs, chkdsk, timeshift;
500
501 dnode_secno root_dno;
502 struct hpfs_dirent *de = NULL;
503 struct quad_buffer_head qbh;
504
505 int o;
506
507 save_mount_options(s, options);
508
509 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
510 if (!sbi) {
511 return -ENOMEM;
512 }
513 s->s_fs_info = sbi;
514
515 mutex_init(&sbi->hpfs_mutex);
516 hpfs_lock(s);
517
518 uid = current_uid();
519 gid = current_gid();
520 umask = current_umask();
521 lowercase = 0;
522 eas = 2;
523 chk = 1;
524 errs = 1;
525 chkdsk = 1;
526 timeshift = 0;
527
528 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase,
529 &eas, &chk, &errs, &chkdsk, ×hift))) {
530 pr_err("bad mount options.\n");
531 goto bail0;
532 }
533 if (o==2) {
534 hpfs_help();
535 goto bail0;
536 }
537
538
539 sb_set_blocksize(s, 512);
540 sbi->sb_fs_size = -1;
541 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
542 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
543 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
544
545
546 if (
547 le32_to_cpu(superblock->magic) != SB_MAGIC
548 || le32_to_cpu(spareblock->magic) != SP_MAGIC) {
549 if (!silent)
550 pr_err("Bad magic ... probably not HPFS\n");
551 goto bail4;
552 }
553
554
555 if (!(s->s_flags & MS_RDONLY) &&
556 superblock->funcversion != 2 && superblock->funcversion != 3) {
557 pr_err("Bad version %d,%d. Mount readonly to go around\n",
558 (int)superblock->version, (int)superblock->funcversion);
559 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");
560 goto bail4;
561 }
562
563 s->s_flags |= MS_NOATIME;
564
565
566 s->s_magic = HPFS_SUPER_MAGIC;
567 s->s_op = &hpfs_sops;
568 s->s_d_op = &hpfs_dentry_operations;
569
570 sbi->sb_root = le32_to_cpu(superblock->root);
571 sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors);
572 sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps);
573 sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start);
574 sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band);
575 sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap);
576 sbi->sb_uid = uid;
577 sbi->sb_gid = gid;
578 sbi->sb_mode = 0777 & ~umask;
579 sbi->sb_n_free = -1;
580 sbi->sb_n_free_dnodes = -1;
581 sbi->sb_lowercase = lowercase;
582 sbi->sb_eas = eas;
583 sbi->sb_chk = chk;
584 sbi->sb_chkdsk = chkdsk;
585 sbi->sb_err = errs;
586 sbi->sb_timeshift = timeshift;
587 sbi->sb_was_error = 0;
588 sbi->sb_cp_table = NULL;
589 sbi->sb_c_bitmap = -1;
590 sbi->sb_max_fwd_alloc = 0xffffff;
591
592 if (sbi->sb_fs_size >= 0x80000000) {
593 hpfs_error(s, "invalid size in superblock: %08x",
594 (unsigned)sbi->sb_fs_size);
595 goto bail4;
596 }
597
598
599 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps))))
600 goto bail4;
601
602
603 if (spareblock->dirty && !spareblock->old_wrote) {
604 if (errs == 2) {
605 pr_err("Improperly stopped, not mounted\n");
606 goto bail4;
607 }
608 hpfs_error(s, "improperly stopped");
609 }
610
611 if (!(s->s_flags & MS_RDONLY)) {
612 spareblock->dirty = 1;
613 spareblock->old_wrote = 0;
614 mark_buffer_dirty(bh2);
615 }
616
617 if (spareblock->hotfixes_used || spareblock->n_spares_used) {
618 if (errs >= 2) {
619 pr_err("Hotfixes not supported here, try chkdsk\n");
620 mark_dirty(s, 0);
621 goto bail4;
622 }
623 hpfs_error(s, "hotfixes not supported here, try chkdsk");
624 if (errs == 0)
625 pr_err("Proceeding, but your filesystem will be probably corrupted by this driver...\n");
626 else
627 pr_err("This driver may read bad files or crash when operating on disk with hotfixes.\n");
628 }
629 if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) {
630 if (errs >= 2) {
631 pr_err("Spare dnodes used, try chkdsk\n");
632 mark_dirty(s, 0);
633 goto bail4;
634 }
635 hpfs_error(s, "warning: spare dnodes used, try chkdsk");
636 if (errs == 0)
637 pr_err("Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
638 }
639 if (chk) {
640 unsigned a;
641 if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) ||
642 le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) {
643 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
644 le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band));
645 goto bail4;
646 }
647 a = sbi->sb_dirband_size;
648 sbi->sb_dirband_size = 0;
649 if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") ||
650 hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") ||
651 hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) {
652 mark_dirty(s, 0);
653 goto bail4;
654 }
655 sbi->sb_dirband_size = a;
656 } else
657 pr_err("You really don't want any checks? You are crazy...\n");
658
659
660 if (le32_to_cpu(spareblock->n_code_pages))
661 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir))))
662 pr_err("code page support is disabled\n");
663
664 brelse(bh2);
665 brelse(bh1);
666 brelse(bh0);
667
668 root = iget_locked(s, sbi->sb_root);
669 if (!root)
670 goto bail0;
671 hpfs_init_inode(root);
672 hpfs_read_inode(root);
673 unlock_new_inode(root);
674 s->s_root = d_make_root(root);
675 if (!s->s_root)
676 goto bail0;
677
678
679
680
681
682 root_dno = hpfs_fnode_dno(s, sbi->sb_root);
683 if (root_dno)
684 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
685 if (!de)
686 hpfs_error(s, "unable to find root dir");
687 else {
688 root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date));
689 root->i_atime.tv_nsec = 0;
690 root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date));
691 root->i_mtime.tv_nsec = 0;
692 root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date));
693 root->i_ctime.tv_nsec = 0;
694 hpfs_i(root)->i_ea_size = le32_to_cpu(de->ea_size);
695 hpfs_i(root)->i_parent_dir = root->i_ino;
696 if (root->i_size == -1)
697 root->i_size = 2048;
698 if (root->i_blocks == -1)
699 root->i_blocks = 5;
700 hpfs_brelse4(&qbh);
701 }
702 hpfs_unlock(s);
703 return 0;
704
705bail4: brelse(bh2);
706bail3: brelse(bh1);
707bail2: brelse(bh0);
708bail1:
709bail0:
710 hpfs_unlock(s);
711 free_sbi(sbi);
712 return -EINVAL;
713}
714
715static struct dentry *hpfs_mount(struct file_system_type *fs_type,
716 int flags, const char *dev_name, void *data)
717{
718 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super);
719}
720
721static struct file_system_type hpfs_fs_type = {
722 .owner = THIS_MODULE,
723 .name = "hpfs",
724 .mount = hpfs_mount,
725 .kill_sb = kill_block_super,
726 .fs_flags = FS_REQUIRES_DEV,
727};
728MODULE_ALIAS_FS("hpfs");
729
730static int __init init_hpfs_fs(void)
731{
732 int err = init_inodecache();
733 if (err)
734 goto out1;
735 err = register_filesystem(&hpfs_fs_type);
736 if (err)
737 goto out;
738 return 0;
739out:
740 destroy_inodecache();
741out1:
742 return err;
743}
744
745static void __exit exit_hpfs_fs(void)
746{
747 unregister_filesystem(&hpfs_fs_type);
748 destroy_inodecache();
749}
750
751module_init(init_hpfs_fs)
752module_exit(exit_hpfs_fs)
753MODULE_LICENSE("GPL");
754
