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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
214
215
216
217 rcu_barrier();
218 kmem_cache_destroy(hpfs_inode_cachep);
219}
220
221
222
223
224
225
226
227enum {
228 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis,
229 Opt_check_none, Opt_check_normal, Opt_check_strict,
230 Opt_err_cont, Opt_err_ro, Opt_err_panic,
231 Opt_eas_no, Opt_eas_ro, Opt_eas_rw,
232 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always,
233 Opt_timeshift, Opt_err,
234};
235
236static const match_table_t tokens = {
237 {Opt_help, "help"},
238 {Opt_uid, "uid=%u"},
239 {Opt_gid, "gid=%u"},
240 {Opt_umask, "umask=%o"},
241 {Opt_case_lower, "case=lower"},
242 {Opt_case_asis, "case=asis"},
243 {Opt_check_none, "check=none"},
244 {Opt_check_normal, "check=normal"},
245 {Opt_check_strict, "check=strict"},
246 {Opt_err_cont, "errors=continue"},
247 {Opt_err_ro, "errors=remount-ro"},
248 {Opt_err_panic, "errors=panic"},
249 {Opt_eas_no, "eas=no"},
250 {Opt_eas_ro, "eas=ro"},
251 {Opt_eas_rw, "eas=rw"},
252 {Opt_chkdsk_no, "chkdsk=no"},
253 {Opt_chkdsk_errors, "chkdsk=errors"},
254 {Opt_chkdsk_always, "chkdsk=always"},
255 {Opt_timeshift, "timeshift=%d"},
256 {Opt_err, NULL},
257};
258
259static int parse_opts(char *opts, kuid_t *uid, kgid_t *gid, umode_t *umask,
260 int *lowercase, int *eas, int *chk, int *errs,
261 int *chkdsk, int *timeshift)
262{
263 char *p;
264 int option;
265
266 if (!opts)
267 return 1;
268
269
270
271 while ((p = strsep(&opts, ",")) != NULL) {
272 substring_t args[MAX_OPT_ARGS];
273 int token;
274 if (!*p)
275 continue;
276
277 token = match_token(p, tokens, args);
278 switch (token) {
279 case Opt_help:
280 return 2;
281 case Opt_uid:
282 if (match_int(args, &option))
283 return 0;
284 *uid = make_kuid(current_user_ns(), option);
285 if (!uid_valid(*uid))
286 return 0;
287 break;
288 case Opt_gid:
289 if (match_int(args, &option))
290 return 0;
291 *gid = make_kgid(current_user_ns(), option);
292 if (!gid_valid(*gid))
293 return 0;
294 break;
295 case Opt_umask:
296 if (match_octal(args, &option))
297 return 0;
298 *umask = option;
299 break;
300 case Opt_case_lower:
301 *lowercase = 1;
302 break;
303 case Opt_case_asis:
304 *lowercase = 0;
305 break;
306 case Opt_check_none:
307 *chk = 0;
308 break;
309 case Opt_check_normal:
310 *chk = 1;
311 break;
312 case Opt_check_strict:
313 *chk = 2;
314 break;
315 case Opt_err_cont:
316 *errs = 0;
317 break;
318 case Opt_err_ro:
319 *errs = 1;
320 break;
321 case Opt_err_panic:
322 *errs = 2;
323 break;
324 case Opt_eas_no:
325 *eas = 0;
326 break;
327 case Opt_eas_ro:
328 *eas = 1;
329 break;
330 case Opt_eas_rw:
331 *eas = 2;
332 break;
333 case Opt_chkdsk_no:
334 *chkdsk = 0;
335 break;
336 case Opt_chkdsk_errors:
337 *chkdsk = 1;
338 break;
339 case Opt_chkdsk_always:
340 *chkdsk = 2;
341 break;
342 case Opt_timeshift:
343 {
344 int m = 1;
345 char *rhs = args[0].from;
346 if (!rhs || !*rhs)
347 return 0;
348 if (*rhs == '-') m = -1;
349 if (*rhs == '+' || *rhs == '-') rhs++;
350 *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
351 if (*rhs)
352 return 0;
353 break;
354 }
355 default:
356 return 0;
357 }
358 }
359 return 1;
360}
361
362static inline void hpfs_help(void)
363{
364 printk("\n\
365HPFS filesystem options:\n\
366 help do not mount and display this text\n\
367 uid=xxx set uid of files that don't have uid specified in eas\n\
368 gid=xxx set gid of files that don't have gid specified in eas\n\
369 umask=xxx set mode of files that don't have mode specified in eas\n\
370 case=lower lowercase all files\n\
371 case=asis do not lowercase files (default)\n\
372 check=none no fs checks - kernel may crash on corrupted filesystem\n\
373 check=normal do some checks - it should not crash (default)\n\
374 check=strict do extra time-consuming checks, used for debugging\n\
375 errors=continue continue on errors\n\
376 errors=remount-ro remount read-only if errors found (default)\n\
377 errors=panic panic on errors\n\
378 chkdsk=no do not mark fs for chkdsking even if there were errors\n\
379 chkdsk=errors mark fs dirty if errors found (default)\n\
380 chkdsk=always always mark fs dirty - used for debugging\n\
381 eas=no ignore extended attributes\n\
382 eas=ro read but do not write extended attributes\n\
383 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
384 timeshift=nnn add nnn seconds to file times\n\
385\n");
386}
387
388static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
389{
390 kuid_t uid;
391 kgid_t gid;
392 umode_t umask;
393 int lowercase, eas, chk, errs, chkdsk, timeshift;
394 int o;
395 struct hpfs_sb_info *sbi = hpfs_sb(s);
396 char *new_opts = kstrdup(data, GFP_KERNEL);
397
398 *flags |= MS_NOATIME;
399
400 hpfs_lock(s);
401 uid = sbi->sb_uid; gid = sbi->sb_gid;
402 umask = 0777 & ~sbi->sb_mode;
403 lowercase = sbi->sb_lowercase;
404 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk;
405 errs = sbi->sb_err; timeshift = sbi->sb_timeshift;
406
407 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase,
408 &eas, &chk, &errs, &chkdsk, ×hift))) {
409 printk("HPFS: bad mount options.\n");
410 goto out_err;
411 }
412 if (o == 2) {
413 hpfs_help();
414 goto out_err;
415 }
416 if (timeshift != sbi->sb_timeshift) {
417 printk("HPFS: timeshift can't be changed using remount.\n");
418 goto out_err;
419 }
420
421 unmark_dirty(s);
422
423 sbi->sb_uid = uid; sbi->sb_gid = gid;
424 sbi->sb_mode = 0777 & ~umask;
425 sbi->sb_lowercase = lowercase;
426 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk;
427 sbi->sb_err = errs; sbi->sb_timeshift = timeshift;
428
429 if (!(*flags & MS_RDONLY)) mark_dirty(s, 1);
430
431 replace_mount_options(s, new_opts);
432
433 hpfs_unlock(s);
434 return 0;
435
436out_err:
437 hpfs_unlock(s);
438 kfree(new_opts);
439 return -EINVAL;
440}
441
442
443
444static const struct super_operations hpfs_sops =
445{
446 .alloc_inode = hpfs_alloc_inode,
447 .destroy_inode = hpfs_destroy_inode,
448 .evict_inode = hpfs_evict_inode,
449 .put_super = hpfs_put_super,
450 .statfs = hpfs_statfs,
451 .remount_fs = hpfs_remount_fs,
452 .show_options = generic_show_options,
453};
454
455static int hpfs_fill_super(struct super_block *s, void *options, int silent)
456{
457 struct buffer_head *bh0, *bh1, *bh2;
458 struct hpfs_boot_block *bootblock;
459 struct hpfs_super_block *superblock;
460 struct hpfs_spare_block *spareblock;
461 struct hpfs_sb_info *sbi;
462 struct inode *root;
463
464 kuid_t uid;
465 kgid_t gid;
466 umode_t umask;
467 int lowercase, eas, chk, errs, chkdsk, timeshift;
468
469 dnode_secno root_dno;
470 struct hpfs_dirent *de = NULL;
471 struct quad_buffer_head qbh;
472
473 int o;
474
475 save_mount_options(s, options);
476
477 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
478 if (!sbi) {
479 return -ENOMEM;
480 }
481 s->s_fs_info = sbi;
482
483 sbi->sb_bmp_dir = NULL;
484 sbi->sb_cp_table = NULL;
485
486 mutex_init(&sbi->hpfs_mutex);
487 hpfs_lock(s);
488
489 uid = current_uid();
490 gid = current_gid();
491 umask = current_umask();
492 lowercase = 0;
493 eas = 2;
494 chk = 1;
495 errs = 1;
496 chkdsk = 1;
497 timeshift = 0;
498
499 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase,
500 &eas, &chk, &errs, &chkdsk, ×hift))) {
501 printk("HPFS: bad mount options.\n");
502 goto bail0;
503 }
504 if (o==2) {
505 hpfs_help();
506 goto bail0;
507 }
508
509
510 sb_set_blocksize(s, 512);
511 sbi->sb_fs_size = -1;
512 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
513 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
514 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
515
516
517 if (
518 le32_to_cpu(superblock->magic) != SB_MAGIC
519 || le32_to_cpu(spareblock->magic) != SP_MAGIC) {
520 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n");
521 goto bail4;
522 }
523
524
525 if (!(s->s_flags & MS_RDONLY) &&
526 superblock->funcversion != 2 && superblock->funcversion != 3) {
527 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n",
528 (int)superblock->version, (int)superblock->funcversion);
529 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");
530 goto bail4;
531 }
532
533 s->s_flags |= MS_NOATIME;
534
535
536 s->s_magic = HPFS_SUPER_MAGIC;
537 s->s_op = &hpfs_sops;
538 s->s_d_op = &hpfs_dentry_operations;
539
540 sbi->sb_root = le32_to_cpu(superblock->root);
541 sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors);
542 sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps);
543 sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start);
544 sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band);
545 sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap);
546 sbi->sb_uid = uid;
547 sbi->sb_gid = gid;
548 sbi->sb_mode = 0777 & ~umask;
549 sbi->sb_n_free = -1;
550 sbi->sb_n_free_dnodes = -1;
551 sbi->sb_lowercase = lowercase;
552 sbi->sb_eas = eas;
553 sbi->sb_chk = chk;
554 sbi->sb_chkdsk = chkdsk;
555 sbi->sb_err = errs;
556 sbi->sb_timeshift = timeshift;
557 sbi->sb_was_error = 0;
558 sbi->sb_cp_table = NULL;
559 sbi->sb_c_bitmap = -1;
560 sbi->sb_max_fwd_alloc = 0xffffff;
561
562
563 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps))))
564 goto bail4;
565
566
567 if (spareblock->dirty && !spareblock->old_wrote) {
568 if (errs == 2) {
569 printk("HPFS: Improperly stopped, not mounted\n");
570 goto bail4;
571 }
572 hpfs_error(s, "improperly stopped");
573 }
574
575 if (!(s->s_flags & MS_RDONLY)) {
576 spareblock->dirty = 1;
577 spareblock->old_wrote = 0;
578 mark_buffer_dirty(bh2);
579 }
580
581 if (spareblock->hotfixes_used || spareblock->n_spares_used) {
582 if (errs >= 2) {
583 printk("HPFS: Hotfixes not supported here, try chkdsk\n");
584 mark_dirty(s, 0);
585 goto bail4;
586 }
587 hpfs_error(s, "hotfixes not supported here, try chkdsk");
588 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n");
589 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n");
590 }
591 if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) {
592 if (errs >= 2) {
593 printk("HPFS: Spare dnodes used, try chkdsk\n");
594 mark_dirty(s, 0);
595 goto bail4;
596 }
597 hpfs_error(s, "warning: spare dnodes used, try chkdsk");
598 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
599 }
600 if (chk) {
601 unsigned a;
602 if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) ||
603 le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) {
604 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
605 le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band));
606 goto bail4;
607 }
608 a = sbi->sb_dirband_size;
609 sbi->sb_dirband_size = 0;
610 if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") ||
611 hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") ||
612 hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) {
613 mark_dirty(s, 0);
614 goto bail4;
615 }
616 sbi->sb_dirband_size = a;
617 } else printk("HPFS: You really don't want any checks? You are crazy...\n");
618
619
620 if (le32_to_cpu(spareblock->n_code_pages))
621 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir))))
622 printk("HPFS: Warning: code page support is disabled\n");
623
624 brelse(bh2);
625 brelse(bh1);
626 brelse(bh0);
627
628 root = iget_locked(s, sbi->sb_root);
629 if (!root)
630 goto bail0;
631 hpfs_init_inode(root);
632 hpfs_read_inode(root);
633 unlock_new_inode(root);
634 s->s_root = d_make_root(root);
635 if (!s->s_root)
636 goto bail0;
637
638
639
640
641
642 root_dno = hpfs_fnode_dno(s, sbi->sb_root);
643 if (root_dno)
644 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
645 if (!de)
646 hpfs_error(s, "unable to find root dir");
647 else {
648 root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date));
649 root->i_atime.tv_nsec = 0;
650 root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date));
651 root->i_mtime.tv_nsec = 0;
652 root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date));
653 root->i_ctime.tv_nsec = 0;
654 hpfs_i(root)->i_ea_size = le32_to_cpu(de->ea_size);
655 hpfs_i(root)->i_parent_dir = root->i_ino;
656 if (root->i_size == -1)
657 root->i_size = 2048;
658 if (root->i_blocks == -1)
659 root->i_blocks = 5;
660 hpfs_brelse4(&qbh);
661 }
662 hpfs_unlock(s);
663 return 0;
664
665bail4: brelse(bh2);
666bail3: brelse(bh1);
667bail2: brelse(bh0);
668bail1:
669bail0:
670 hpfs_unlock(s);
671 kfree(sbi->sb_bmp_dir);
672 kfree(sbi->sb_cp_table);
673 s->s_fs_info = NULL;
674 kfree(sbi);
675 return -EINVAL;
676}
677
678static struct dentry *hpfs_mount(struct file_system_type *fs_type,
679 int flags, const char *dev_name, void *data)
680{
681 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super);
682}
683
684static struct file_system_type hpfs_fs_type = {
685 .owner = THIS_MODULE,
686 .name = "hpfs",
687 .mount = hpfs_mount,
688 .kill_sb = kill_block_super,
689 .fs_flags = FS_REQUIRES_DEV,
690};
691MODULE_ALIAS_FS("hpfs");
692
693static int __init init_hpfs_fs(void)
694{
695 int err = init_inodecache();
696 if (err)
697 goto out1;
698 err = register_filesystem(&hpfs_fs_type);
699 if (err)
700 goto out;
701 return 0;
702out:
703 destroy_inodecache();
704out1:
705 return err;
706}
707
708static void __exit exit_hpfs_fs(void)
709{
710 unregister_filesystem(&hpfs_fs_type);
711 destroy_inodecache();
712}
713
714module_init(init_hpfs_fs)
715module_exit(exit_hpfs_fs)
716MODULE_LICENSE("GPL");
717
