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x86: backmerge 64-bit details into 32-bit pageattr.c
[wrt350n-kernel.git] / fs / hpfs / super.c
blob00971d999964848884187593fb744ef16888620a
1 /*
2 * linux/fs/hpfs/super.c
3 *
4 * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
5 *
6 * mounting, unmounting, error handling
7 */
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
17 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
18
19 static void mark_dirty(struct super_block *s)
20 {
21 if (hpfs_sb(s)->sb_chkdsk && !(s->s_flags & MS_RDONLY)) {
22 struct buffer_head *bh;
23 struct hpfs_spare_block *sb;
24 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
25 sb->dirty = 1;
26 sb->old_wrote = 0;
27 mark_buffer_dirty(bh);
28 brelse(bh);
29 }
30 }
31 }
32
33 /* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there
34 were errors) */
35
36 static void unmark_dirty(struct super_block *s)
37 {
38 struct buffer_head *bh;
39 struct hpfs_spare_block *sb;
40 if (s->s_flags & MS_RDONLY) return;
41 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
42 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error;
43 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error;
44 mark_buffer_dirty(bh);
45 brelse(bh);
46 }
47 }
48
49 /* Filesystem error... */
50 static char err_buf[1024];
51
52 void hpfs_error(struct super_block *s, const char *fmt, ...)
53 {
54 va_list args;
55
56 va_start(args, fmt);
57 vsnprintf(err_buf, sizeof(err_buf), fmt, args);
58 va_end(args);
59
60 printk("HPFS: filesystem error: %s", err_buf);
61 if (!hpfs_sb(s)->sb_was_error) {
62 if (hpfs_sb(s)->sb_err == 2) {
63 printk("; crashing the system because you wanted it\n");
64 mark_dirty(s);
65 panic("HPFS panic");
66 } else if (hpfs_sb(s)->sb_err == 1) {
67 if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n");
68 else {
69 printk("; remounting read-only\n");
70 mark_dirty(s);
71 s->s_flags |= MS_RDONLY;
72 }
73 } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n");
74 else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n");
75 } else printk("\n");
76 hpfs_sb(s)->sb_was_error = 1;
77 }
78
79 /*
80 * A little trick to detect cycles in many hpfs structures and don't let the
81 * kernel crash on corrupted filesystem. When first called, set c2 to 0.
82 *
83 * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories
84 * nested each in other, chkdsk locked up happilly.
85 */
86
87 int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
88 char *msg)
89 {
90 if (*c2 && *c1 == key) {
91 hpfs_error(s, "cycle detected on key %08x in %s", key, msg);
92 return 1;
93 }
94 (*c2)++;
95 if (!((*c2 - 1) & *c2)) *c1 = key;
96 return 0;
97 }
98
99 static void hpfs_put_super(struct super_block *s)
100 {
101 struct hpfs_sb_info *sbi = hpfs_sb(s);
102 kfree(sbi->sb_cp_table);
103 kfree(sbi->sb_bmp_dir);
104 unmark_dirty(s);
105 s->s_fs_info = NULL;
106 kfree(sbi);
107 }
108
109 unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
110 {
111 struct quad_buffer_head qbh;
112 unsigned *bits;
113 unsigned i, count;
114 if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0;
115 count = 0;
116 for (i = 0; i < 2048 / sizeof(unsigned); i++) {
117 unsigned b;
118 if (!bits[i]) continue;
119 for (b = bits[i]; b; b>>=1) count += b & 1;
120 }
121 hpfs_brelse4(&qbh);
122 return count;
123 }
124
125 static unsigned count_bitmaps(struct super_block *s)
126 {
127 unsigned n, count, n_bands;
128 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
129 count = 0;
130 for (n = 0; n < n_bands; n++)
131 count += hpfs_count_one_bitmap(s, hpfs_sb(s)->sb_bmp_dir[n]);
132 return count;
133 }
134
135 static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
136 {
137 struct super_block *s = dentry->d_sb;
138 struct hpfs_sb_info *sbi = hpfs_sb(s);
139 lock_kernel();
140
141 /*if (sbi->sb_n_free == -1) {*/
142 sbi->sb_n_free = count_bitmaps(s);
143 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap);
144 /*}*/
145 buf->f_type = s->s_magic;
146 buf->f_bsize = 512;
147 buf->f_blocks = sbi->sb_fs_size;
148 buf->f_bfree = sbi->sb_n_free;
149 buf->f_bavail = sbi->sb_n_free;
150 buf->f_files = sbi->sb_dirband_size / 4;
151 buf->f_ffree = sbi->sb_n_free_dnodes;
152 buf->f_namelen = 254;
153
154 unlock_kernel();
155
156 return 0;
157 }
158
159 static struct kmem_cache * hpfs_inode_cachep;
160
161 static struct inode *hpfs_alloc_inode(struct super_block *sb)
162 {
163 struct hpfs_inode_info *ei;
164 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS);
165 if (!ei)
166 return NULL;
167 ei->vfs_inode.i_version = 1;
168 return &ei->vfs_inode;
169 }
170
171 static void hpfs_destroy_inode(struct inode *inode)
172 {
173 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
174 }
175
176 static void init_once(struct kmem_cache *cachep, void *foo)
177 {
178 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
179
180 mutex_init(&ei->i_mutex);
181 mutex_init(&ei->i_parent_mutex);
182 inode_init_once(&ei->vfs_inode);
183 }
184
185 static int init_inodecache(void)
186 {
187 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache",
188 sizeof(struct hpfs_inode_info),
189 0, (SLAB_RECLAIM_ACCOUNT|
190 SLAB_MEM_SPREAD),
191 init_once);
192 if (hpfs_inode_cachep == NULL)
193 return -ENOMEM;
194 return 0;
195 }
196
197 static void destroy_inodecache(void)
198 {
199 kmem_cache_destroy(hpfs_inode_cachep);
200 }
201
202 /*
203 * A tiny parser for option strings, stolen from dosfs.
204 * Stolen again from read-only hpfs.
205 * And updated for table-driven option parsing.
206 */
207
208 enum {
209 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis,
210 Opt_conv_binary, Opt_conv_text, Opt_conv_auto,
211 Opt_check_none, Opt_check_normal, Opt_check_strict,
212 Opt_err_cont, Opt_err_ro, Opt_err_panic,
213 Opt_eas_no, Opt_eas_ro, Opt_eas_rw,
214 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always,
215 Opt_timeshift, Opt_err,
216 };
217
218 static match_table_t tokens = {
219 {Opt_help, "help"},
220 {Opt_uid, "uid=%u"},
221 {Opt_gid, "gid=%u"},
222 {Opt_umask, "umask=%o"},
223 {Opt_case_lower, "case=lower"},
224 {Opt_case_asis, "case=asis"},
225 {Opt_conv_binary, "conv=binary"},
226 {Opt_conv_text, "conv=text"},
227 {Opt_conv_auto, "conv=auto"},
228 {Opt_check_none, "check=none"},
229 {Opt_check_normal, "check=normal"},
230 {Opt_check_strict, "check=strict"},
231 {Opt_err_cont, "errors=continue"},
232 {Opt_err_ro, "errors=remount-ro"},
233 {Opt_err_panic, "errors=panic"},
234 {Opt_eas_no, "eas=no"},
235 {Opt_eas_ro, "eas=ro"},
236 {Opt_eas_rw, "eas=rw"},
237 {Opt_chkdsk_no, "chkdsk=no"},
238 {Opt_chkdsk_errors, "chkdsk=errors"},
239 {Opt_chkdsk_always, "chkdsk=always"},
240 {Opt_timeshift, "timeshift=%d"},
241 {Opt_err, NULL},
242 };
243
244 static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask,
245 int *lowercase, int *conv, int *eas, int *chk, int *errs,
246 int *chkdsk, int *timeshift)
247 {
248 char *p;
249 int option;
250
251 if (!opts)
252 return 1;
253
254 /*printk("Parsing opts: '%s'\n",opts);*/
255
256 while ((p = strsep(&opts, ",")) != NULL) {
257 substring_t args[MAX_OPT_ARGS];
258 int token;
259 if (!*p)
260 continue;
261
262 token = match_token(p, tokens, args);
263 switch (token) {
264 case Opt_help:
265 return 2;
266 case Opt_uid:
267 if (match_int(args, &option))
268 return 0;
269 *uid = option;
270 break;
271 case Opt_gid:
272 if (match_int(args, &option))
273 return 0;
274 *gid = option;
275 break;
276 case Opt_umask:
277 if (match_octal(args, &option))
278 return 0;
279 *umask = option;
280 break;
281 case Opt_case_lower:
282 *lowercase = 1;
283 break;
284 case Opt_case_asis:
285 *lowercase = 0;
286 break;
287 case Opt_conv_binary:
288 *conv = CONV_BINARY;
289 break;
290 case Opt_conv_text:
291 *conv = CONV_TEXT;
292 break;
293 case Opt_conv_auto:
294 *conv = CONV_AUTO;
295 break;
296 case Opt_check_none:
297 *chk = 0;
298 break;
299 case Opt_check_normal:
300 *chk = 1;
301 break;
302 case Opt_check_strict:
303 *chk = 2;
304 break;
305 case Opt_err_cont:
306 *errs = 0;
307 break;
308 case Opt_err_ro:
309 *errs = 1;
310 break;
311 case Opt_err_panic:
312 *errs = 2;
313 break;
314 case Opt_eas_no:
315 *eas = 0;
316 break;
317 case Opt_eas_ro:
318 *eas = 1;
319 break;
320 case Opt_eas_rw:
321 *eas = 2;
322 break;
323 case Opt_chkdsk_no:
324 *chkdsk = 0;
325 break;
326 case Opt_chkdsk_errors:
327 *chkdsk = 1;
328 break;
329 case Opt_chkdsk_always:
330 *chkdsk = 2;
331 break;
332 case Opt_timeshift:
333 {
334 int m = 1;
335 char *rhs = args[0].from;
336 if (!rhs || !*rhs)
337 return 0;
338 if (*rhs == '-') m = -1;
339 if (*rhs == '+' || *rhs == '-') rhs++;
340 *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
341 if (*rhs)
342 return 0;
343 break;
344 }
345 default:
346 return 0;
347 }
348 }
349 return 1;
350 }
351
352 static inline void hpfs_help(void)
353 {
354 printk("\n\
355 HPFS filesystem options:\n\
356 help do not mount and display this text\n\
357 uid=xxx set uid of files that don't have uid specified in eas\n\
358 gid=xxx set gid of files that don't have gid specified in eas\n\
359 umask=xxx set mode of files that don't have mode specified in eas\n\
360 case=lower lowercase all files\n\
361 case=asis do not lowercase files (default)\n\
362 conv=binary do not convert CR/LF -> LF (default)\n\
363 conv=auto convert only files with known text extensions\n\
364 conv=text convert all files\n\
365 check=none no fs checks - kernel may crash on corrupted filesystem\n\
366 check=normal do some checks - it should not crash (default)\n\
367 check=strict do extra time-consuming checks, used for debugging\n\
368 errors=continue continue on errors\n\
369 errors=remount-ro remount read-only if errors found (default)\n\
370 errors=panic panic on errors\n\
371 chkdsk=no do not mark fs for chkdsking even if there were errors\n\
372 chkdsk=errors mark fs dirty if errors found (default)\n\
373 chkdsk=always always mark fs dirty - used for debugging\n\
374 eas=no ignore extended attributes\n\
375 eas=ro read but do not write extended attributes\n\
376 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
377 timeshift=nnn add nnn seconds to file times\n\
378 \n");
379 }
380
381 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
382 {
383 uid_t uid;
384 gid_t gid;
385 umode_t umask;
386 int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
387 int o;
388 struct hpfs_sb_info *sbi = hpfs_sb(s);
389
390 *flags |= MS_NOATIME;
391
392 uid = sbi->sb_uid; gid = sbi->sb_gid;
393 umask = 0777 & ~sbi->sb_mode;
394 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv;
395 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk;
396 errs = sbi->sb_err; timeshift = sbi->sb_timeshift;
397
398 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv,
399 &eas, &chk, &errs, &chkdsk, &timeshift))) {
400 printk("HPFS: bad mount options.\n");
401 return 1;
402 }
403 if (o == 2) {
404 hpfs_help();
405 return 1;
406 }
407 if (timeshift != sbi->sb_timeshift) {
408 printk("HPFS: timeshift can't be changed using remount.\n");
409 return 1;
410 }
411
412 unmark_dirty(s);
413
414 sbi->sb_uid = uid; sbi->sb_gid = gid;
415 sbi->sb_mode = 0777 & ~umask;
416 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv;
417 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk;
418 sbi->sb_err = errs; sbi->sb_timeshift = timeshift;
419
420 if (!(*flags & MS_RDONLY)) mark_dirty(s);
421
422 return 0;
423 }
424
425 /* Super operations */
426
427 static const struct super_operations hpfs_sops =
428 {
429 .alloc_inode = hpfs_alloc_inode,
430 .destroy_inode = hpfs_destroy_inode,
431 .delete_inode = hpfs_delete_inode,
432 .put_super = hpfs_put_super,
433 .statfs = hpfs_statfs,
434 .remount_fs = hpfs_remount_fs,
435 };
436
437 static int hpfs_fill_super(struct super_block *s, void *options, int silent)
438 {
439 struct buffer_head *bh0, *bh1, *bh2;
440 struct hpfs_boot_block *bootblock;
441 struct hpfs_super_block *superblock;
442 struct hpfs_spare_block *spareblock;
443 struct hpfs_sb_info *sbi;
444 struct inode *root;
445
446 uid_t uid;
447 gid_t gid;
448 umode_t umask;
449 int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
450
451 dnode_secno root_dno;
452 struct hpfs_dirent *de = NULL;
453 struct quad_buffer_head qbh;
454
455 int o;
456
457 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
458 if (!sbi)
459 return -ENOMEM;
460 s->s_fs_info = sbi;
461
462 sbi->sb_bmp_dir = NULL;
463 sbi->sb_cp_table = NULL;
464
465 init_MUTEX(&sbi->hpfs_creation_de);
466
467 uid = current->uid;
468 gid = current->gid;
469 umask = current->fs->umask;
470 lowercase = 0;
471 conv = CONV_BINARY;
472 eas = 2;
473 chk = 1;
474 errs = 1;
475 chkdsk = 1;
476 timeshift = 0;
477
478 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv,
479 &eas, &chk, &errs, &chkdsk, &timeshift))) {
480 printk("HPFS: bad mount options.\n");
481 goto bail0;
482 }
483 if (o==2) {
484 hpfs_help();
485 goto bail0;
486 }
487
488 /*sbi->sb_mounting = 1;*/
489 sb_set_blocksize(s, 512);
490 sbi->sb_fs_size = -1;
491 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
492 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
493 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
494
495 /* Check magics */
496 if (/*bootblock->magic != BB_MAGIC
497 ||*/ superblock->magic != SB_MAGIC
498 || spareblock->magic != SP_MAGIC) {
499 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n");
500 goto bail4;
501 }
502
503 /* Check version */
504 if (!(s->s_flags & MS_RDONLY) &&
505 superblock->funcversion != 2 && superblock->funcversion != 3) {
506 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n",
507 (int)superblock->version, (int)superblock->funcversion);
508 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");
509 goto bail4;
510 }
511
512 s->s_flags |= MS_NOATIME;
513
514 /* Fill superblock stuff */
515 s->s_magic = HPFS_SUPER_MAGIC;
516 s->s_op = &hpfs_sops;
517
518 sbi->sb_root = superblock->root;
519 sbi->sb_fs_size = superblock->n_sectors;
520 sbi->sb_bitmaps = superblock->bitmaps;
521 sbi->sb_dirband_start = superblock->dir_band_start;
522 sbi->sb_dirband_size = superblock->n_dir_band;
523 sbi->sb_dmap = superblock->dir_band_bitmap;
524 sbi->sb_uid = uid;
525 sbi->sb_gid = gid;
526 sbi->sb_mode = 0777 & ~umask;
527 sbi->sb_n_free = -1;
528 sbi->sb_n_free_dnodes = -1;
529 sbi->sb_lowercase = lowercase;
530 sbi->sb_conv = conv;
531 sbi->sb_eas = eas;
532 sbi->sb_chk = chk;
533 sbi->sb_chkdsk = chkdsk;
534 sbi->sb_err = errs;
535 sbi->sb_timeshift = timeshift;
536 sbi->sb_was_error = 0;
537 sbi->sb_cp_table = NULL;
538 sbi->sb_c_bitmap = -1;
539 sbi->sb_max_fwd_alloc = 0xffffff;
540
541 /* Load bitmap directory */
542 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps)))
543 goto bail4;
544
545 /* Check for general fs errors*/
546 if (spareblock->dirty && !spareblock->old_wrote) {
547 if (errs == 2) {
548 printk("HPFS: Improperly stopped, not mounted\n");
549 goto bail4;
550 }
551 hpfs_error(s, "improperly stopped");
552 }
553
554 if (!(s->s_flags & MS_RDONLY)) {
555 spareblock->dirty = 1;
556 spareblock->old_wrote = 0;
557 mark_buffer_dirty(bh2);
558 }
559
560 if (spareblock->hotfixes_used || spareblock->n_spares_used) {
561 if (errs >= 2) {
562 printk("HPFS: Hotfixes not supported here, try chkdsk\n");
563 mark_dirty(s);
564 goto bail4;
565 }
566 hpfs_error(s, "hotfixes not supported here, try chkdsk");
567 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n");
568 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n");
569 }
570 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) {
571 if (errs >= 2) {
572 printk("HPFS: Spare dnodes used, try chkdsk\n");
573 mark_dirty(s);
574 goto bail4;
575 }
576 hpfs_error(s, "warning: spare dnodes used, try chkdsk");
577 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
578 }
579 if (chk) {
580 unsigned a;
581 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band ||
582 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) {
583 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
584 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band);
585 goto bail4;
586 }
587 a = sbi->sb_dirband_size;
588 sbi->sb_dirband_size = 0;
589 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") ||
590 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") ||
591 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) {
592 mark_dirty(s);
593 goto bail4;
594 }
595 sbi->sb_dirband_size = a;
596 } else printk("HPFS: You really don't want any checks? You are crazy...\n");
597
598 /* Load code page table */
599 if (spareblock->n_code_pages)
600 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir)))
601 printk("HPFS: Warning: code page support is disabled\n");
602
603 brelse(bh2);
604 brelse(bh1);
605 brelse(bh0);
606
607 root = iget_locked(s, sbi->sb_root);
608 if (!root)
609 goto bail0;
610 hpfs_init_inode(root);
611 hpfs_read_inode(root);
612 unlock_new_inode(root);
613 s->s_root = d_alloc_root(root);
614 if (!s->s_root) {
615 iput(root);
616 goto bail0;
617 }
618 hpfs_set_dentry_operations(s->s_root);
619
620 /*
621 * find the root directory's . pointer & finish filling in the inode
622 */
623
624 root_dno = hpfs_fnode_dno(s, sbi->sb_root);
625 if (root_dno)
626 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
627 if (!de)
628 hpfs_error(s, "unable to find root dir");
629 else {
630 root->i_atime.tv_sec = local_to_gmt(s, de->read_date);
631 root->i_atime.tv_nsec = 0;
632 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date);
633 root->i_mtime.tv_nsec = 0;
634 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date);
635 root->i_ctime.tv_nsec = 0;
636 hpfs_i(root)->i_ea_size = de->ea_size;
637 hpfs_i(root)->i_parent_dir = root->i_ino;
638 if (root->i_size == -1)
639 root->i_size = 2048;
640 if (root->i_blocks == -1)
641 root->i_blocks = 5;
642 hpfs_brelse4(&qbh);
643 }
644 return 0;
645
646 bail4: brelse(bh2);
647 bail3: brelse(bh1);
648 bail2: brelse(bh0);
649 bail1:
650 bail0:
651 kfree(sbi->sb_bmp_dir);
652 kfree(sbi->sb_cp_table);
653 s->s_fs_info = NULL;
654 kfree(sbi);
655 return -EINVAL;
656 }
657
658 static int hpfs_get_sb(struct file_system_type *fs_type,
659 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
660 {
661 return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super,
662 mnt);
663 }
664
665 static struct file_system_type hpfs_fs_type = {
666 .owner = THIS_MODULE,
667 .name = "hpfs",
668 .get_sb = hpfs_get_sb,
669 .kill_sb = kill_block_super,
670 .fs_flags = FS_REQUIRES_DEV,
671 };
672
673 static int __init init_hpfs_fs(void)
674 {
675 int err = init_inodecache();
676 if (err)
677 goto out1;
678 err = register_filesystem(&hpfs_fs_type);
679 if (err)
680 goto out;
681 return 0;
682 out:
683 destroy_inodecache();
684 out1:
685 return err;
686 }
687
688 static void __exit exit_hpfs_fs(void)
689 {
690 unregister_filesystem(&hpfs_fs_type);
691 destroy_inodecache();
692 }
693
694 module_init(init_hpfs_fs)
695 module_exit(exit_hpfs_fs)
696 MODULE_LICENSE("GPL");
WRT350N Kernel Patches