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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 printk("HPFS: filesystem error: %s", err_buf);
66 if (!hpfs_sb(s)->sb_was_error) {
67 if (hpfs_sb(s)->sb_err == 2) {
68 printk("; 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) printk("; already mounted read-only\n");
73 else {
74 printk("; remounting read-only\n");
75 mark_dirty(s, 0);
76 s->s_flags |= MS_RDONLY;
77 }
78 } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n");
79 else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n");
80 } else printk("\n");
81 hpfs_sb(s)->sb_was_error = 1;
82}
83
84
85
86
87
88
89
90
91
92int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
93 char *msg)
94{
95 if (*c2 && *c1 == key) {
96 hpfs_error(s, "cycle detected on key %08x in %s", key, msg);
97 return 1;
98 }
99 (*c2)++;
100 if (!((*c2 - 1) & *c2)) *c1 = key;
101 return 0;
102}
103
104static void hpfs_put_super(struct super_block *s)
105{
106 struct hpfs_sb_info *sbi = hpfs_sb(s);
107
108 hpfs_lock(s);
109 unmark_dirty(s);
110 hpfs_unlock(s);
111
112 kfree(sbi->sb_cp_table);
113 kfree(sbi->sb_bmp_dir);
114 s->s_fs_info = NULL;
115 kfree(sbi);
116}
117
118unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
119{
120 struct quad_buffer_head qbh;
121 unsigned long *bits;
122 unsigned count;
123
124 bits = hpfs_map_4sectors(s, secno, &qbh, 4);
125 if (!bits)
126 return 0;
127 count = bitmap_weight(bits, 2048 * BITS_PER_BYTE);
128 hpfs_brelse4(&qbh);
129 return count;
130}
131
132static unsigned count_bitmaps(struct super_block *s)
133{
134 unsigned n, count, n_bands;
135 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
136 count = 0;
137 for (n = 0; n < n_bands; n++)
138 count += hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n]));
139 return count;
140}
141
142static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
143{
144 struct super_block *s = dentry->d_sb;
145 struct hpfs_sb_info *sbi = hpfs_sb(s);
146 u64 id = huge_encode_dev(s->s_bdev->bd_dev);
147 hpfs_lock(s);
148
149
150 sbi->sb_n_free = count_bitmaps(s);
151 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap);
152
153 buf->f_type = s->s_magic;
154 buf->f_bsize = 512;
155 buf->f_blocks = sbi->sb_fs_size;
156 buf->f_bfree = sbi->sb_n_free;
157 buf->f_bavail = sbi->sb_n_free;
158 buf->f_files = sbi->sb_dirband_size / 4;
159 buf->f_ffree = sbi->sb_n_free_dnodes;
160 buf->f_fsid.val[0] = (u32)id;
161 buf->f_fsid.val[1] = (u32)(id >> 32);
162 buf->f_namelen = 254;
163
164 hpfs_unlock(s);
165
166 return 0;
167}
168
169static struct kmem_cache * hpfs_inode_cachep;
170
171static struct inode *hpfs_alloc_inode(struct super_block *sb)
172{
173 struct hpfs_inode_info *ei;
174 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS);
175 if (!ei)
176 return NULL;
177 ei->vfs_inode.i_version = 1;
178 return &ei->vfs_inode;
179}
180
181static void hpfs_i_callback(struct rcu_head *head)
182{
183 struct inode *inode = container_of(head, struct inode, i_rcu);
184 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
185}
186
187static void hpfs_destroy_inode(struct inode *inode)
188{
189 call_rcu(&inode->i_rcu, hpfs_i_callback);
190}
191
192static void init_once(void *foo)
193{
194 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
195
196 inode_init_once(&ei->vfs_inode);
197}
198
199static int init_inodecache(void)
200{
201 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache",
202 sizeof(struct hpfs_inode_info),
203 0, (SLAB_RECLAIM_ACCOUNT|
204 SLAB_MEM_SPREAD),
205 init_once);
206 if (hpfs_inode_cachep == NULL)
207 return -ENOMEM;
208 return 0;
209}
210
211static void destroy_inodecache(void)
212{
213 kmem_cache_destroy(hpfs_inode_cachep);
214}
215
216
217
218
219
220
221
222enum {
223 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis,
224 Opt_check_none, Opt_check_normal, Opt_check_strict,
225 Opt_err_cont, Opt_err_ro, Opt_err_panic,
226 Opt_eas_no, Opt_eas_ro, Opt_eas_rw,
227 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always,
228 Opt_timeshift, Opt_err,
229};
230
231static const match_table_t tokens = {
232 {Opt_help, "help"},
233 {Opt_uid, "uid=%u"},
234 {Opt_gid, "gid=%u"},
235 {Opt_umask, "umask=%o"},
236 {Opt_case_lower, "case=lower"},
237 {Opt_case_asis, "case=asis"},
238 {Opt_check_none, "check=none"},
239 {Opt_check_normal, "check=normal"},
240 {Opt_check_strict, "check=strict"},
241 {Opt_err_cont, "errors=continue"},
242 {Opt_err_ro, "errors=remount-ro"},
243 {Opt_err_panic, "errors=panic"},
244 {Opt_eas_no, "eas=no"},
245 {Opt_eas_ro, "eas=ro"},
246 {Opt_eas_rw, "eas=rw"},
247 {Opt_chkdsk_no, "chkdsk=no"},
248 {Opt_chkdsk_errors, "chkdsk=errors"},
249 {Opt_chkdsk_always, "chkdsk=always"},
250 {Opt_timeshift, "timeshift=%d"},
251 {Opt_err, NULL},
252};
253
254static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask,
255 int *lowercase, int *eas, int *chk, int *errs,
256 int *chkdsk, int *timeshift)
257{
258 char *p;
259 int option;
260
261 if (!opts)
262 return 1;
263
264
265
266 while ((p = strsep(&opts, ",")) != NULL) {
267 substring_t args[MAX_OPT_ARGS];
268 int token;
269 if (!*p)
270 continue;
271
272 token = match_token(p, tokens, args);
273 switch (token) {
274 case Opt_help:
275 return 2;
276 case Opt_uid:
277 if (match_int(args, &option))
278 return 0;
279 *uid = option;
280 break;
281 case Opt_gid:
282 if (match_int(args, &option))
283 return 0;
284 *gid = option;
285 break;
286 case Opt_umask:
287 if (match_octal(args, &option))
288 return 0;
289 *umask = option;
290 break;
291 case Opt_case_lower:
292 *lowercase = 1;
293 break;
294 case Opt_case_asis:
295 *lowercase = 0;
296 break;
297 case Opt_check_none:
298 *chk = 0;
299 break;
300 case Opt_check_normal:
301 *chk = 1;
302 break;
303 case Opt_check_strict:
304 *chk = 2;
305 break;
306 case Opt_err_cont:
307 *errs = 0;
308 break;
309 case Opt_err_ro:
310 *errs = 1;
311 break;
312 case Opt_err_panic:
313 *errs = 2;
314 break;
315 case Opt_eas_no:
316 *eas = 0;
317 break;
318 case Opt_eas_ro:
319 *eas = 1;
320 break;
321 case Opt_eas_rw:
322 *eas = 2;
323 break;
324 case Opt_chkdsk_no:
325 *chkdsk = 0;
326 break;
327 case Opt_chkdsk_errors:
328 *chkdsk = 1;
329 break;
330 case Opt_chkdsk_always:
331 *chkdsk = 2;
332 break;
333 case Opt_timeshift:
334 {
335 int m = 1;
336 char *rhs = args[0].from;
337 if (!rhs || !*rhs)
338 return 0;
339 if (*rhs == '-') m = -1;
340 if (*rhs == '+' || *rhs == '-') rhs++;
341 *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
342 if (*rhs)
343 return 0;
344 break;
345 }
346 default:
347 return 0;
348 }
349 }
350 return 1;
351}
352
353static inline void hpfs_help(void)
354{
355 printk("\n\
356HPFS filesystem options:\n\
357 help do not mount and display this text\n\
358 uid=xxx set uid of files that don't have uid specified in eas\n\
359 gid=xxx set gid of files that don't have gid specified in eas\n\
360 umask=xxx set mode of files that don't have mode specified in eas\n\
361 case=lower lowercase all files\n\
362 case=asis do not lowercase files (default)\n\
363 check=none no fs checks - kernel may crash on corrupted filesystem\n\
364 check=normal do some checks - it should not crash (default)\n\
365 check=strict do extra time-consuming checks, used for debugging\n\
366 errors=continue continue on errors\n\
367 errors=remount-ro remount read-only if errors found (default)\n\
368 errors=panic panic on errors\n\
369 chkdsk=no do not mark fs for chkdsking even if there were errors\n\
370 chkdsk=errors mark fs dirty if errors found (default)\n\
371 chkdsk=always always mark fs dirty - used for debugging\n\
372 eas=no ignore extended attributes\n\
373 eas=ro read but do not write extended attributes\n\
374 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
375 timeshift=nnn add nnn seconds to file times\n\
376\n");
377}
378
379static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
380{
381 uid_t uid;
382 gid_t gid;
383 umode_t umask;
384 int lowercase, eas, chk, errs, chkdsk, timeshift;
385 int o;
386 struct hpfs_sb_info *sbi = hpfs_sb(s);
387 char *new_opts = kstrdup(data, GFP_KERNEL);
388
389 *flags |= MS_NOATIME;
390
391 hpfs_lock(s);
392 lock_super(s);
393 uid = sbi->sb_uid; gid = sbi->sb_gid;
394 umask = 0777 & ~sbi->sb_mode;
395 lowercase = sbi->sb_lowercase;
396 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk;
397 errs = sbi->sb_err; timeshift = sbi->sb_timeshift;
398
399 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase,
400 &eas, &chk, &errs, &chkdsk, ×hift))) {
401 printk("HPFS: bad mount options.\n");
402 goto out_err;
403 }
404 if (o == 2) {
405 hpfs_help();
406 goto out_err;
407 }
408 if (timeshift != sbi->sb_timeshift) {
409 printk("HPFS: timeshift can't be changed using remount.\n");
410 goto out_err;
411 }
412
413 unmark_dirty(s);
414
415 sbi->sb_uid = uid; sbi->sb_gid = gid;
416 sbi->sb_mode = 0777 & ~umask;
417 sbi->sb_lowercase = lowercase;
418 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk;
419 sbi->sb_err = errs; sbi->sb_timeshift = timeshift;
420
421 if (!(*flags & MS_RDONLY)) mark_dirty(s, 1);
422
423 replace_mount_options(s, new_opts);
424
425 unlock_super(s);
426 hpfs_unlock(s);
427 return 0;
428
429out_err:
430 unlock_super(s);
431 hpfs_unlock(s);
432 kfree(new_opts);
433 return -EINVAL;
434}
435
436
437
438static const struct super_operations hpfs_sops =
439{
440 .alloc_inode = hpfs_alloc_inode,
441 .destroy_inode = hpfs_destroy_inode,
442 .evict_inode = hpfs_evict_inode,
443 .put_super = hpfs_put_super,
444 .statfs = hpfs_statfs,
445 .remount_fs = hpfs_remount_fs,
446 .show_options = generic_show_options,
447};
448
449static int hpfs_fill_super(struct super_block *s, void *options, int silent)
450{
451 struct buffer_head *bh0, *bh1, *bh2;
452 struct hpfs_boot_block *bootblock;
453 struct hpfs_super_block *superblock;
454 struct hpfs_spare_block *spareblock;
455 struct hpfs_sb_info *sbi;
456 struct inode *root;
457
458 uid_t uid;
459 gid_t gid;
460 umode_t umask;
461 int lowercase, eas, chk, errs, chkdsk, timeshift;
462
463 dnode_secno root_dno;
464 struct hpfs_dirent *de = NULL;
465 struct quad_buffer_head qbh;
466
467 int o;
468
469 save_mount_options(s, options);
470
471 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
472 if (!sbi) {
473 return -ENOMEM;
474 }
475 s->s_fs_info = sbi;
476
477 sbi->sb_bmp_dir = NULL;
478 sbi->sb_cp_table = NULL;
479
480 mutex_init(&sbi->hpfs_mutex);
481 hpfs_lock(s);
482
483 uid = current_uid();
484 gid = current_gid();
485 umask = current_umask();
486 lowercase = 0;
487 eas = 2;
488 chk = 1;
489 errs = 1;
490 chkdsk = 1;
491 timeshift = 0;
492
493 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase,
494 &eas, &chk, &errs, &chkdsk, ×hift))) {
495 printk("HPFS: bad mount options.\n");
496 goto bail0;
497 }
498 if (o==2) {
499 hpfs_help();
500 goto bail0;
501 }
502
503
504 sb_set_blocksize(s, 512);
505 sbi->sb_fs_size = -1;
506 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
507 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
508 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
509
510
511 if (
512 le32_to_cpu(superblock->magic) != SB_MAGIC
513 || le32_to_cpu(spareblock->magic) != SP_MAGIC) {
514 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n");
515 goto bail4;
516 }
517
518
519 if (!(s->s_flags & MS_RDONLY) &&
520 superblock->funcversion != 2 && superblock->funcversion != 3) {
521 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n",
522 (int)superblock->version, (int)superblock->funcversion);
523 printk("HPFS: 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");
524 goto bail4;
525 }
526
527 s->s_flags |= MS_NOATIME;
528
529
530 s->s_magic = HPFS_SUPER_MAGIC;
531 s->s_op = &hpfs_sops;
532 s->s_d_op = &hpfs_dentry_operations;
533
534 sbi->sb_root = le32_to_cpu(superblock->root);
535 sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors);
536 sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps);
537 sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start);
538 sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band);
539 sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap);
540 sbi->sb_uid = uid;
541 sbi->sb_gid = gid;
542 sbi->sb_mode = 0777 & ~umask;
543 sbi->sb_n_free = -1;
544 sbi->sb_n_free_dnodes = -1;
545 sbi->sb_lowercase = lowercase;
546 sbi->sb_eas = eas;
547 sbi->sb_chk = chk;
548 sbi->sb_chkdsk = chkdsk;
549 sbi->sb_err = errs;
550 sbi->sb_timeshift = timeshift;
551 sbi->sb_was_error = 0;
552 sbi->sb_cp_table = NULL;
553 sbi->sb_c_bitmap = -1;
554 sbi->sb_max_fwd_alloc = 0xffffff;
555
556
557 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps))))
558 goto bail4;
559
560
561 if (spareblock->dirty && !spareblock->old_wrote) {
562 if (errs == 2) {
563 printk("HPFS: Improperly stopped, not mounted\n");
564 goto bail4;
565 }
566 hpfs_error(s, "improperly stopped");
567 }
568
569 if (!(s->s_flags & MS_RDONLY)) {
570 spareblock->dirty = 1;
571 spareblock->old_wrote = 0;
572 mark_buffer_dirty(bh2);
573 }
574
575 if (le32_to_cpu(spareblock->hotfixes_used) || le32_to_cpu(spareblock->n_spares_used)) {
576 if (errs >= 2) {
577 printk("HPFS: Hotfixes not supported here, try chkdsk\n");
578 mark_dirty(s, 0);
579 goto bail4;
580 }
581 hpfs_error(s, "hotfixes not supported here, try chkdsk");
582 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n");
583 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n");
584 }
585 if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) {
586 if (errs >= 2) {
587 printk("HPFS: Spare dnodes used, try chkdsk\n");
588 mark_dirty(s, 0);
589 goto bail4;
590 }
591 hpfs_error(s, "warning: spare dnodes used, try chkdsk");
592 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
593 }
594 if (chk) {
595 unsigned a;
596 if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) ||
597 le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) {
598 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
599 le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band));
600 goto bail4;
601 }
602 a = sbi->sb_dirband_size;
603 sbi->sb_dirband_size = 0;
604 if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") ||
605 hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") ||
606 hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) {
607 mark_dirty(s, 0);
608 goto bail4;
609 }
610 sbi->sb_dirband_size = a;
611 } else printk("HPFS: You really don't want any checks? You are crazy...\n");
612
613
614 if (le32_to_cpu(spareblock->n_code_pages))
615 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir))))
616 printk("HPFS: Warning: code page support is disabled\n");
617
618 brelse(bh2);
619 brelse(bh1);
620 brelse(bh0);
621
622 root = iget_locked(s, sbi->sb_root);
623 if (!root)
624 goto bail0;
625 hpfs_init_inode(root);
626 hpfs_read_inode(root);
627 unlock_new_inode(root);
628 s->s_root = d_alloc_root(root);
629 if (!s->s_root) {
630 iput(root);
631 goto bail0;
632 }
633
634
635
636
637
638 root_dno = hpfs_fnode_dno(s, sbi->sb_root);
639 if (root_dno)
640 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
641 if (!de)
642 hpfs_error(s, "unable to find root dir");
643 else {
644 root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date));
645 root->i_atime.tv_nsec = 0;
646 root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date));
647 root->i_mtime.tv_nsec = 0;
648 root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date));
649 root->i_ctime.tv_nsec = 0;
650 hpfs_i(root)->i_ea_size = le16_to_cpu(de->ea_size);
651 hpfs_i(root)->i_parent_dir = root->i_ino;
652 if (root->i_size == -1)
653 root->i_size = 2048;
654 if (root->i_blocks == -1)
655 root->i_blocks = 5;
656 hpfs_brelse4(&qbh);
657 }
658 hpfs_unlock(s);
659 return 0;
660
661bail4: brelse(bh2);
662bail3: brelse(bh1);
663bail2: brelse(bh0);
664bail1:
665bail0:
666 hpfs_unlock(s);
667 kfree(sbi->sb_bmp_dir);
668 kfree(sbi->sb_cp_table);
669 s->s_fs_info = NULL;
670 kfree(sbi);
671 return -EINVAL;
672}
673
674static struct dentry *hpfs_mount(struct file_system_type *fs_type,
675 int flags, const char *dev_name, void *data)
676{
677 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super);
678}
679
680static struct file_system_type hpfs_fs_type = {
681 .owner = THIS_MODULE,
682 .name = "hpfs",
683 .mount = hpfs_mount,
684 .kill_sb = kill_block_super,
685 .fs_flags = FS_REQUIRES_DEV,
686};
687
688static int __init init_hpfs_fs(void)
689{
690 int err = init_inodecache();
691 if (err)
692 goto out1;
693 err = register_filesystem(&hpfs_fs_type);
694 if (err)
695 goto out;
696 return 0;
697out:
698 destroy_inodecache();
699out1:
700 return err;
701}
702
703static void __exit exit_hpfs_fs(void)
704{
705 unregister_filesystem(&hpfs_fs_type);
706 destroy_inodecache();
707}
708
709module_init(init_hpfs_fs)
710module_exit(exit_hpfs_fs)
711MODULE_LICENSE("GPL");
712
