blob: d72d8c87c9962a5fa64afd25c86e0e605fd8ba12 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
15/* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
16
17static void mark_dirty(struct super_block *s)
18{
19 if (hpfs_sb(s)->sb_chkdsk && !(s->s_flags & MS_RDONLY)) {
20 struct buffer_head *bh;
21 struct hpfs_spare_block *sb;
22 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
23 sb->dirty = 1;
24 sb->old_wrote = 0;
25 mark_buffer_dirty(bh);
26 brelse(bh);
27 }
28 }
29}
30
31/* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there
32 were errors) */
33
34static void unmark_dirty(struct super_block *s)
35{
36 struct buffer_head *bh;
37 struct hpfs_spare_block *sb;
38 if (s->s_flags & MS_RDONLY) return;
39 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
40 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error;
41 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error;
42 mark_buffer_dirty(bh);
43 brelse(bh);
44 }
45}
46
47/* Filesystem error... */
48
49#define ERR_BUF_SIZE 1024
50
51void hpfs_error(struct super_block *s, char *m,...)
52{
53 char *buf;
54 va_list l;
55 va_start(l, m);
56 if (!(buf = kmalloc(ERR_BUF_SIZE, GFP_KERNEL)))
57 printk("HPFS: No memory for error message '%s'\n",m);
58 else if (vsprintf(buf, m, l) >= ERR_BUF_SIZE)
59 printk("HPFS: Grrrr... Kernel memory corrupted ... going on, but it'll crash very soon :-(\n");
60 printk("HPFS: filesystem error: ");
61 if (buf) printk("%s", buf);
62 else printk("%s\n",m);
63 if (!hpfs_sb(s)->sb_was_error) {
64 if (hpfs_sb(s)->sb_err == 2) {
65 printk("; crashing the system because you wanted it\n");
66 mark_dirty(s);
67 panic("HPFS panic");
68 } else if (hpfs_sb(s)->sb_err == 1) {
69 if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n");
70 else {
71 printk("; remounting read-only\n");
72 mark_dirty(s);
73 s->s_flags |= MS_RDONLY;
74 }
75 } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n");
76 else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n");
77 } else printk("\n");
Jesper Juhlf99d49a2005-11-07 01:01:34 -080078 kfree(buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 hpfs_sb(s)->sb_was_error = 1;
80}
81
82/*
83 * A little trick to detect cycles in many hpfs structures and don't let the
84 * kernel crash on corrupted filesystem. When first called, set c2 to 0.
85 *
86 * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories
87 * nested each in other, chkdsk locked up happilly.
88 */
89
90int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
91 char *msg)
92{
93 if (*c2 && *c1 == key) {
94 hpfs_error(s, "cycle detected on key %08x in %s", key, msg);
95 return 1;
96 }
97 (*c2)++;
98 if (!((*c2 - 1) & *c2)) *c1 = key;
99 return 0;
100}
101
102static void hpfs_put_super(struct super_block *s)
103{
104 struct hpfs_sb_info *sbi = hpfs_sb(s);
Jesper Juhlf99d49a2005-11-07 01:01:34 -0800105 kfree(sbi->sb_cp_table);
106 kfree(sbi->sb_bmp_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 unmark_dirty(s);
108 s->s_fs_info = NULL;
109 kfree(sbi);
110}
111
112unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
113{
114 struct quad_buffer_head qbh;
115 unsigned *bits;
116 unsigned i, count;
117 if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0;
118 count = 0;
119 for (i = 0; i < 2048 / sizeof(unsigned); i++) {
120 unsigned b;
121 if (!bits[i]) continue;
122 for (b = bits[i]; b; b>>=1) count += b & 1;
123 }
124 hpfs_brelse4(&qbh);
125 return count;
126}
127
128static unsigned count_bitmaps(struct super_block *s)
129{
130 unsigned n, count, n_bands;
131 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
132 count = 0;
133 for (n = 0; n < n_bands; n++)
134 count += hpfs_count_one_bitmap(s, hpfs_sb(s)->sb_bmp_dir[n]);
135 return count;
136}
137
138static int hpfs_statfs(struct super_block *s, struct kstatfs *buf)
139{
140 struct hpfs_sb_info *sbi = hpfs_sb(s);
141 lock_kernel();
142
143 /*if (sbi->sb_n_free == -1) {*/
144 sbi->sb_n_free = count_bitmaps(s);
145 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap);
146 /*}*/
147 buf->f_type = s->s_magic;
148 buf->f_bsize = 512;
149 buf->f_blocks = sbi->sb_fs_size;
150 buf->f_bfree = sbi->sb_n_free;
151 buf->f_bavail = sbi->sb_n_free;
152 buf->f_files = sbi->sb_dirband_size / 4;
153 buf->f_ffree = sbi->sb_n_free_dnodes;
154 buf->f_namelen = 254;
155
156 unlock_kernel();
157
158 return 0;
159}
160
161static kmem_cache_t * hpfs_inode_cachep;
162
163static struct inode *hpfs_alloc_inode(struct super_block *sb)
164{
165 struct hpfs_inode_info *ei;
166 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, SLAB_NOFS);
167 if (!ei)
168 return NULL;
169 ei->vfs_inode.i_version = 1;
170 return &ei->vfs_inode;
171}
172
173static void hpfs_destroy_inode(struct inode *inode)
174{
175 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
176}
177
178static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
179{
180 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
181
182 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
183 SLAB_CTOR_CONSTRUCTOR) {
Ingo Molnar7bf6d782006-03-23 03:00:42 -0800184 mutex_init(&ei->i_mutex);
185 mutex_init(&ei->i_parent_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 inode_init_once(&ei->vfs_inode);
187 }
188}
189
190static int init_inodecache(void)
191{
192 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache",
193 sizeof(struct hpfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800194 0, (SLAB_RECLAIM_ACCOUNT|
195 SLAB_MEM_SPREAD),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 init_once, NULL);
197 if (hpfs_inode_cachep == NULL)
198 return -ENOMEM;
199 return 0;
200}
201
202static void destroy_inodecache(void)
203{
204 if (kmem_cache_destroy(hpfs_inode_cachep))
205 printk(KERN_INFO "hpfs_inode_cache: not all structures were freed\n");
206}
207
208/*
209 * A tiny parser for option strings, stolen from dosfs.
210 * Stolen again from read-only hpfs.
211 * And updated for table-driven option parsing.
212 */
213
214enum {
215 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis,
216 Opt_conv_binary, Opt_conv_text, Opt_conv_auto,
217 Opt_check_none, Opt_check_normal, Opt_check_strict,
218 Opt_err_cont, Opt_err_ro, Opt_err_panic,
219 Opt_eas_no, Opt_eas_ro, Opt_eas_rw,
220 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always,
221 Opt_timeshift, Opt_err,
222};
223
224static match_table_t tokens = {
225 {Opt_help, "help"},
226 {Opt_uid, "uid=%u"},
227 {Opt_gid, "gid=%u"},
228 {Opt_umask, "umask=%o"},
229 {Opt_case_lower, "case=lower"},
230 {Opt_case_asis, "case=asis"},
231 {Opt_conv_binary, "conv=binary"},
232 {Opt_conv_text, "conv=text"},
233 {Opt_conv_auto, "conv=auto"},
234 {Opt_check_none, "check=none"},
235 {Opt_check_normal, "check=normal"},
236 {Opt_check_strict, "check=strict"},
237 {Opt_err_cont, "errors=continue"},
238 {Opt_err_ro, "errors=remount-ro"},
239 {Opt_err_panic, "errors=panic"},
240 {Opt_eas_no, "eas=no"},
241 {Opt_eas_ro, "eas=ro"},
242 {Opt_eas_rw, "eas=rw"},
243 {Opt_chkdsk_no, "chkdsk=no"},
244 {Opt_chkdsk_errors, "chkdsk=errors"},
245 {Opt_chkdsk_always, "chkdsk=always"},
246 {Opt_timeshift, "timeshift=%d"},
247 {Opt_err, NULL},
248};
249
250static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask,
251 int *lowercase, int *conv, int *eas, int *chk, int *errs,
252 int *chkdsk, int *timeshift)
253{
254 char *p;
255 int option;
256
257 if (!opts)
258 return 1;
259
260 /*printk("Parsing opts: '%s'\n",opts);*/
261
262 while ((p = strsep(&opts, ",")) != NULL) {
263 substring_t args[MAX_OPT_ARGS];
264 int token;
265 if (!*p)
266 continue;
267
268 token = match_token(p, tokens, args);
269 switch (token) {
270 case Opt_help:
271 return 2;
272 case Opt_uid:
273 if (match_int(args, &option))
274 return 0;
275 *uid = option;
276 break;
277 case Opt_gid:
278 if (match_int(args, &option))
279 return 0;
280 *gid = option;
281 break;
282 case Opt_umask:
283 if (match_octal(args, &option))
284 return 0;
285 *umask = option;
286 break;
287 case Opt_case_lower:
288 *lowercase = 1;
289 break;
290 case Opt_case_asis:
291 *lowercase = 0;
292 break;
293 case Opt_conv_binary:
294 *conv = CONV_BINARY;
295 break;
296 case Opt_conv_text:
297 *conv = CONV_TEXT;
298 break;
299 case Opt_conv_auto:
300 *conv = CONV_AUTO;
301 break;
302 case Opt_check_none:
303 *chk = 0;
304 break;
305 case Opt_check_normal:
306 *chk = 1;
307 break;
308 case Opt_check_strict:
309 *chk = 2;
310 break;
311 case Opt_err_cont:
312 *errs = 0;
313 break;
314 case Opt_err_ro:
315 *errs = 1;
316 break;
317 case Opt_err_panic:
318 *errs = 2;
319 break;
320 case Opt_eas_no:
321 *eas = 0;
322 break;
323 case Opt_eas_ro:
324 *eas = 1;
325 break;
326 case Opt_eas_rw:
327 *eas = 2;
328 break;
329 case Opt_chkdsk_no:
330 *chkdsk = 0;
331 break;
332 case Opt_chkdsk_errors:
333 *chkdsk = 1;
334 break;
335 case Opt_chkdsk_always:
336 *chkdsk = 2;
337 break;
338 case Opt_timeshift:
339 {
340 int m = 1;
341 char *rhs = args[0].from;
342 if (!rhs || !*rhs)
343 return 0;
344 if (*rhs == '-') m = -1;
345 if (*rhs == '+' || *rhs == '-') rhs++;
346 *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
347 if (*rhs)
348 return 0;
349 break;
350 }
351 default:
352 return 0;
353 }
354 }
355 return 1;
356}
357
358static inline void hpfs_help(void)
359{
360 printk("\n\
361HPFS filesystem options:\n\
362 help do not mount and display this text\n\
363 uid=xxx set uid of files that don't have uid specified in eas\n\
364 gid=xxx set gid of files that don't have gid specified in eas\n\
365 umask=xxx set mode of files that don't have mode specified in eas\n\
366 case=lower lowercase all files\n\
367 case=asis do not lowercase files (default)\n\
368 conv=binary do not convert CR/LF -> LF (default)\n\
369 conv=auto convert only files with known text extensions\n\
370 conv=text convert all files\n\
371 check=none no fs checks - kernel may crash on corrupted filesystem\n\
372 check=normal do some checks - it should not crash (default)\n\
373 check=strict do extra time-consuming checks, used for debugging\n\
374 errors=continue continue on errors\n\
375 errors=remount-ro remount read-only if errors found (default)\n\
376 errors=panic panic on errors\n\
377 chkdsk=no do not mark fs for chkdsking even if there were errors\n\
378 chkdsk=errors mark fs dirty if errors found (default)\n\
379 chkdsk=always always mark fs dirty - used for debugging\n\
380 eas=no ignore extended attributes\n\
381 eas=ro read but do not write extended attributes\n\
382 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
383 timeshift=nnn add nnn seconds to file times\n\
384\n");
385}
386
387static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
388{
389 uid_t uid;
390 gid_t gid;
391 umode_t umask;
392 int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
393 int o;
394 struct hpfs_sb_info *sbi = hpfs_sb(s);
395
396 *flags |= MS_NOATIME;
397
398 uid = sbi->sb_uid; gid = sbi->sb_gid;
399 umask = 0777 & ~sbi->sb_mode;
400 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv;
401 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk;
402 errs = sbi->sb_err; timeshift = sbi->sb_timeshift;
403
404 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv,
405 &eas, &chk, &errs, &chkdsk, &timeshift))) {
406 printk("HPFS: bad mount options.\n");
407 return 1;
408 }
409 if (o == 2) {
410 hpfs_help();
411 return 1;
412 }
413 if (timeshift != sbi->sb_timeshift) {
414 printk("HPFS: timeshift can't be changed using remount.\n");
415 return 1;
416 }
417
418 unmark_dirty(s);
419
420 sbi->sb_uid = uid; sbi->sb_gid = gid;
421 sbi->sb_mode = 0777 & ~umask;
422 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv;
423 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk;
424 sbi->sb_err = errs; sbi->sb_timeshift = timeshift;
425
426 if (!(*flags & MS_RDONLY)) mark_dirty(s);
427
428 return 0;
429}
430
431/* Super operations */
432
433static struct super_operations hpfs_sops =
434{
435 .alloc_inode = hpfs_alloc_inode,
436 .destroy_inode = hpfs_destroy_inode,
437 .delete_inode = hpfs_delete_inode,
438 .put_super = hpfs_put_super,
439 .statfs = hpfs_statfs,
440 .remount_fs = hpfs_remount_fs,
441};
442
443static int hpfs_fill_super(struct super_block *s, void *options, int silent)
444{
445 struct buffer_head *bh0, *bh1, *bh2;
446 struct hpfs_boot_block *bootblock;
447 struct hpfs_super_block *superblock;
448 struct hpfs_spare_block *spareblock;
449 struct hpfs_sb_info *sbi;
450 struct inode *root;
451
452 uid_t uid;
453 gid_t gid;
454 umode_t umask;
455 int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
456
457 dnode_secno root_dno;
458 struct hpfs_dirent *de = NULL;
459 struct quad_buffer_head qbh;
460
461 int o;
462
463 sbi = kmalloc(sizeof(*sbi), GFP_KERNEL);
464 if (!sbi)
465 return -ENOMEM;
466 s->s_fs_info = sbi;
467 memset(sbi, 0, sizeof(*sbi));
468
469 sbi->sb_bmp_dir = NULL;
470 sbi->sb_cp_table = NULL;
471
472 init_MUTEX(&sbi->hpfs_creation_de);
473
474 uid = current->uid;
475 gid = current->gid;
476 umask = current->fs->umask;
477 lowercase = 0;
478 conv = CONV_BINARY;
479 eas = 2;
480 chk = 1;
481 errs = 1;
482 chkdsk = 1;
483 timeshift = 0;
484
485 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv,
486 &eas, &chk, &errs, &chkdsk, &timeshift))) {
487 printk("HPFS: bad mount options.\n");
488 goto bail0;
489 }
490 if (o==2) {
491 hpfs_help();
492 goto bail0;
493 }
494
495 /*sbi->sb_mounting = 1;*/
496 sb_set_blocksize(s, 512);
497 sbi->sb_fs_size = -1;
498 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
499 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
500 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
501
502 /* Check magics */
503 if (/*bootblock->magic != BB_MAGIC
504 ||*/ superblock->magic != SB_MAGIC
505 || spareblock->magic != SP_MAGIC) {
506 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n");
507 goto bail4;
508 }
509
510 /* Check version */
511 if (!(s->s_flags & MS_RDONLY) &&
512 superblock->funcversion != 2 && superblock->funcversion != 3) {
513 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n",
514 (int)superblock->version, (int)superblock->funcversion);
515 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");
516 goto bail4;
517 }
518
519 s->s_flags |= MS_NOATIME;
520
521 /* Fill superblock stuff */
522 s->s_magic = HPFS_SUPER_MAGIC;
523 s->s_op = &hpfs_sops;
524
525 sbi->sb_root = superblock->root;
526 sbi->sb_fs_size = superblock->n_sectors;
527 sbi->sb_bitmaps = superblock->bitmaps;
528 sbi->sb_dirband_start = superblock->dir_band_start;
529 sbi->sb_dirband_size = superblock->n_dir_band;
530 sbi->sb_dmap = superblock->dir_band_bitmap;
531 sbi->sb_uid = uid;
532 sbi->sb_gid = gid;
533 sbi->sb_mode = 0777 & ~umask;
534 sbi->sb_n_free = -1;
535 sbi->sb_n_free_dnodes = -1;
536 sbi->sb_lowercase = lowercase;
537 sbi->sb_conv = conv;
538 sbi->sb_eas = eas;
539 sbi->sb_chk = chk;
540 sbi->sb_chkdsk = chkdsk;
541 sbi->sb_err = errs;
542 sbi->sb_timeshift = timeshift;
543 sbi->sb_was_error = 0;
544 sbi->sb_cp_table = NULL;
545 sbi->sb_c_bitmap = -1;
546 sbi->sb_max_fwd_alloc = 0xffffff;
547
548 /* Load bitmap directory */
549 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps)))
550 goto bail4;
551
552 /* Check for general fs errors*/
553 if (spareblock->dirty && !spareblock->old_wrote) {
554 if (errs == 2) {
555 printk("HPFS: Improperly stopped, not mounted\n");
556 goto bail4;
557 }
558 hpfs_error(s, "improperly stopped");
559 }
560
561 if (!(s->s_flags & MS_RDONLY)) {
562 spareblock->dirty = 1;
563 spareblock->old_wrote = 0;
564 mark_buffer_dirty(bh2);
565 }
566
567 if (spareblock->hotfixes_used || spareblock->n_spares_used) {
568 if (errs >= 2) {
569 printk("HPFS: Hotfixes not supported here, try chkdsk\n");
570 mark_dirty(s);
571 goto bail4;
572 }
573 hpfs_error(s, "hotfixes not supported here, try chkdsk");
574 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n");
575 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n");
576 }
577 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) {
578 if (errs >= 2) {
579 printk("HPFS: Spare dnodes used, try chkdsk\n");
580 mark_dirty(s);
581 goto bail4;
582 }
583 hpfs_error(s, "warning: spare dnodes used, try chkdsk");
584 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
585 }
586 if (chk) {
587 unsigned a;
588 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band ||
589 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) {
590 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
591 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band);
592 goto bail4;
593 }
594 a = sbi->sb_dirband_size;
595 sbi->sb_dirband_size = 0;
596 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") ||
597 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") ||
598 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) {
599 mark_dirty(s);
600 goto bail4;
601 }
602 sbi->sb_dirband_size = a;
603 } else printk("HPFS: You really don't want any checks? You are crazy...\n");
604
605 /* Load code page table */
606 if (spareblock->n_code_pages)
607 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir)))
608 printk("HPFS: Warning: code page support is disabled\n");
609
610 brelse(bh2);
611 brelse(bh1);
612 brelse(bh0);
613
614 root = iget_locked(s, sbi->sb_root);
615 if (!root)
616 goto bail0;
617 hpfs_init_inode(root);
618 hpfs_read_inode(root);
619 unlock_new_inode(root);
620 s->s_root = d_alloc_root(root);
621 if (!s->s_root) {
622 iput(root);
623 goto bail0;
624 }
625 hpfs_set_dentry_operations(s->s_root);
626
627 /*
628 * find the root directory's . pointer & finish filling in the inode
629 */
630
631 root_dno = hpfs_fnode_dno(s, sbi->sb_root);
632 if (root_dno)
633 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
634 if (!de)
635 hpfs_error(s, "unable to find root dir");
636 else {
637 root->i_atime.tv_sec = local_to_gmt(s, de->read_date);
638 root->i_atime.tv_nsec = 0;
639 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date);
640 root->i_mtime.tv_nsec = 0;
641 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date);
642 root->i_ctime.tv_nsec = 0;
643 hpfs_i(root)->i_ea_size = de->ea_size;
644 hpfs_i(root)->i_parent_dir = root->i_ino;
645 if (root->i_size == -1)
646 root->i_size = 2048;
647 if (root->i_blocks == -1)
648 root->i_blocks = 5;
649 hpfs_brelse4(&qbh);
650 }
651 return 0;
652
653bail4: brelse(bh2);
654bail3: brelse(bh1);
655bail2: brelse(bh0);
656bail1:
657bail0:
Jesper Juhlf99d49a2005-11-07 01:01:34 -0800658 kfree(sbi->sb_bmp_dir);
659 kfree(sbi->sb_cp_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 s->s_fs_info = NULL;
661 kfree(sbi);
662 return -EINVAL;
663}
664
665static struct super_block *hpfs_get_sb(struct file_system_type *fs_type,
666 int flags, const char *dev_name, void *data)
667{
668 return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super);
669}
670
671static struct file_system_type hpfs_fs_type = {
672 .owner = THIS_MODULE,
673 .name = "hpfs",
674 .get_sb = hpfs_get_sb,
675 .kill_sb = kill_block_super,
676 .fs_flags = FS_REQUIRES_DEV,
677};
678
679static int __init init_hpfs_fs(void)
680{
681 int err = init_inodecache();
682 if (err)
683 goto out1;
684 err = register_filesystem(&hpfs_fs_type);
685 if (err)
686 goto out;
687 return 0;
688out:
689 destroy_inodecache();
690out1:
691 return err;
692}
693
694static void __exit exit_hpfs_fs(void)
695{
696 unregister_filesystem(&hpfs_fs_type);
697 destroy_inodecache();
698}
699
700module_init(init_hpfs_fs)
701module_exit(exit_hpfs_fs)
702MODULE_LICENSE("GPL");