blob: e0174e338526547d24d255578b0b3adb3ced67b5 [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>
Jeff Garzike18fa702006-09-24 11:13:19 -040014#include <linux/magic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
16/* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
17
18static void mark_dirty(struct super_block *s)
19{
20 if (hpfs_sb(s)->sb_chkdsk && !(s->s_flags & MS_RDONLY)) {
21 struct buffer_head *bh;
22 struct hpfs_spare_block *sb;
23 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
24 sb->dirty = 1;
25 sb->old_wrote = 0;
26 mark_buffer_dirty(bh);
27 brelse(bh);
28 }
29 }
30}
31
32/* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there
33 were errors) */
34
35static void unmark_dirty(struct super_block *s)
36{
37 struct buffer_head *bh;
38 struct hpfs_spare_block *sb;
39 if (s->s_flags & MS_RDONLY) return;
40 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
41 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error;
42 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error;
43 mark_buffer_dirty(bh);
44 brelse(bh);
45 }
46}
47
48/* Filesystem error... */
Alexey Dobriyan352d94d2006-12-06 20:37:04 -080049static char err_buf[1024];
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Alexey Dobriyan352d94d2006-12-06 20:37:04 -080051void hpfs_error(struct super_block *s, const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
Alexey Dobriyan352d94d2006-12-06 20:37:04 -080053 va_list args;
54
55 va_start(args, fmt);
56 vsnprintf(err_buf, sizeof(err_buf), fmt, args);
57 va_end(args);
58
59 printk("HPFS: filesystem error: %s", err_buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 if (!hpfs_sb(s)->sb_was_error) {
61 if (hpfs_sb(s)->sb_err == 2) {
62 printk("; crashing the system because you wanted it\n");
63 mark_dirty(s);
64 panic("HPFS panic");
65 } else if (hpfs_sb(s)->sb_err == 1) {
66 if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n");
67 else {
68 printk("; remounting read-only\n");
69 mark_dirty(s);
70 s->s_flags |= MS_RDONLY;
71 }
72 } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n");
73 else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n");
74 } else printk("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 hpfs_sb(s)->sb_was_error = 1;
76}
77
78/*
79 * A little trick to detect cycles in many hpfs structures and don't let the
80 * kernel crash on corrupted filesystem. When first called, set c2 to 0.
81 *
82 * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories
83 * nested each in other, chkdsk locked up happilly.
84 */
85
86int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
87 char *msg)
88{
89 if (*c2 && *c1 == key) {
90 hpfs_error(s, "cycle detected on key %08x in %s", key, msg);
91 return 1;
92 }
93 (*c2)++;
94 if (!((*c2 - 1) & *c2)) *c1 = key;
95 return 0;
96}
97
98static void hpfs_put_super(struct super_block *s)
99{
100 struct hpfs_sb_info *sbi = hpfs_sb(s);
Jesper Juhlf99d49a2005-11-07 01:01:34 -0800101 kfree(sbi->sb_cp_table);
102 kfree(sbi->sb_bmp_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 unmark_dirty(s);
104 s->s_fs_info = NULL;
105 kfree(sbi);
106}
107
108unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
109{
110 struct quad_buffer_head qbh;
111 unsigned *bits;
112 unsigned i, count;
113 if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0;
114 count = 0;
115 for (i = 0; i < 2048 / sizeof(unsigned); i++) {
116 unsigned b;
117 if (!bits[i]) continue;
118 for (b = bits[i]; b; b>>=1) count += b & 1;
119 }
120 hpfs_brelse4(&qbh);
121 return count;
122}
123
124static unsigned count_bitmaps(struct super_block *s)
125{
126 unsigned n, count, n_bands;
127 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
128 count = 0;
129 for (n = 0; n < n_bands; n++)
130 count += hpfs_count_one_bitmap(s, hpfs_sb(s)->sb_bmp_dir[n]);
131 return count;
132}
133
David Howells726c3342006-06-23 02:02:58 -0700134static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135{
David Howells726c3342006-06-23 02:02:58 -0700136 struct super_block *s = dentry->d_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 struct hpfs_sb_info *sbi = hpfs_sb(s);
138 lock_kernel();
139
140 /*if (sbi->sb_n_free == -1) {*/
141 sbi->sb_n_free = count_bitmaps(s);
142 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap);
143 /*}*/
144 buf->f_type = s->s_magic;
145 buf->f_bsize = 512;
146 buf->f_blocks = sbi->sb_fs_size;
147 buf->f_bfree = sbi->sb_n_free;
148 buf->f_bavail = sbi->sb_n_free;
149 buf->f_files = sbi->sb_dirband_size / 4;
150 buf->f_ffree = sbi->sb_n_free_dnodes;
151 buf->f_namelen = 254;
152
153 unlock_kernel();
154
155 return 0;
156}
157
Christoph Lametere18b8902006-12-06 20:33:20 -0800158static struct kmem_cache * hpfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160static struct inode *hpfs_alloc_inode(struct super_block *sb)
161{
162 struct hpfs_inode_info *ei;
Christoph Lametere6b4f8d2006-12-06 20:33:14 -0800163 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 if (!ei)
165 return NULL;
166 ei->vfs_inode.i_version = 1;
167 return &ei->vfs_inode;
168}
169
170static void hpfs_destroy_inode(struct inode *inode)
171{
172 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
173}
174
Christoph Lametere18b8902006-12-06 20:33:20 -0800175static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176{
177 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
178
179 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
180 SLAB_CTOR_CONSTRUCTOR) {
Ingo Molnar7bf6d782006-03-23 03:00:42 -0800181 mutex_init(&ei->i_mutex);
182 mutex_init(&ei->i_parent_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 inode_init_once(&ei->vfs_inode);
184 }
185}
186
187static int init_inodecache(void)
188{
189 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache",
190 sizeof(struct hpfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800191 0, (SLAB_RECLAIM_ACCOUNT|
192 SLAB_MEM_SPREAD),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 init_once, NULL);
194 if (hpfs_inode_cachep == NULL)
195 return -ENOMEM;
196 return 0;
197}
198
199static void destroy_inodecache(void)
200{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700201 kmem_cache_destroy(hpfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202}
203
204/*
205 * A tiny parser for option strings, stolen from dosfs.
206 * Stolen again from read-only hpfs.
207 * And updated for table-driven option parsing.
208 */
209
210enum {
211 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis,
212 Opt_conv_binary, Opt_conv_text, Opt_conv_auto,
213 Opt_check_none, Opt_check_normal, Opt_check_strict,
214 Opt_err_cont, Opt_err_ro, Opt_err_panic,
215 Opt_eas_no, Opt_eas_ro, Opt_eas_rw,
216 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always,
217 Opt_timeshift, Opt_err,
218};
219
220static match_table_t tokens = {
221 {Opt_help, "help"},
222 {Opt_uid, "uid=%u"},
223 {Opt_gid, "gid=%u"},
224 {Opt_umask, "umask=%o"},
225 {Opt_case_lower, "case=lower"},
226 {Opt_case_asis, "case=asis"},
227 {Opt_conv_binary, "conv=binary"},
228 {Opt_conv_text, "conv=text"},
229 {Opt_conv_auto, "conv=auto"},
230 {Opt_check_none, "check=none"},
231 {Opt_check_normal, "check=normal"},
232 {Opt_check_strict, "check=strict"},
233 {Opt_err_cont, "errors=continue"},
234 {Opt_err_ro, "errors=remount-ro"},
235 {Opt_err_panic, "errors=panic"},
236 {Opt_eas_no, "eas=no"},
237 {Opt_eas_ro, "eas=ro"},
238 {Opt_eas_rw, "eas=rw"},
239 {Opt_chkdsk_no, "chkdsk=no"},
240 {Opt_chkdsk_errors, "chkdsk=errors"},
241 {Opt_chkdsk_always, "chkdsk=always"},
242 {Opt_timeshift, "timeshift=%d"},
243 {Opt_err, NULL},
244};
245
246static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask,
247 int *lowercase, int *conv, int *eas, int *chk, int *errs,
248 int *chkdsk, int *timeshift)
249{
250 char *p;
251 int option;
252
253 if (!opts)
254 return 1;
255
256 /*printk("Parsing opts: '%s'\n",opts);*/
257
258 while ((p = strsep(&opts, ",")) != NULL) {
259 substring_t args[MAX_OPT_ARGS];
260 int token;
261 if (!*p)
262 continue;
263
264 token = match_token(p, tokens, args);
265 switch (token) {
266 case Opt_help:
267 return 2;
268 case Opt_uid:
269 if (match_int(args, &option))
270 return 0;
271 *uid = option;
272 break;
273 case Opt_gid:
274 if (match_int(args, &option))
275 return 0;
276 *gid = option;
277 break;
278 case Opt_umask:
279 if (match_octal(args, &option))
280 return 0;
281 *umask = option;
282 break;
283 case Opt_case_lower:
284 *lowercase = 1;
285 break;
286 case Opt_case_asis:
287 *lowercase = 0;
288 break;
289 case Opt_conv_binary:
290 *conv = CONV_BINARY;
291 break;
292 case Opt_conv_text:
293 *conv = CONV_TEXT;
294 break;
295 case Opt_conv_auto:
296 *conv = CONV_AUTO;
297 break;
298 case Opt_check_none:
299 *chk = 0;
300 break;
301 case Opt_check_normal:
302 *chk = 1;
303 break;
304 case Opt_check_strict:
305 *chk = 2;
306 break;
307 case Opt_err_cont:
308 *errs = 0;
309 break;
310 case Opt_err_ro:
311 *errs = 1;
312 break;
313 case Opt_err_panic:
314 *errs = 2;
315 break;
316 case Opt_eas_no:
317 *eas = 0;
318 break;
319 case Opt_eas_ro:
320 *eas = 1;
321 break;
322 case Opt_eas_rw:
323 *eas = 2;
324 break;
325 case Opt_chkdsk_no:
326 *chkdsk = 0;
327 break;
328 case Opt_chkdsk_errors:
329 *chkdsk = 1;
330 break;
331 case Opt_chkdsk_always:
332 *chkdsk = 2;
333 break;
334 case Opt_timeshift:
335 {
336 int m = 1;
337 char *rhs = args[0].from;
338 if (!rhs || !*rhs)
339 return 0;
340 if (*rhs == '-') m = -1;
341 if (*rhs == '+' || *rhs == '-') rhs++;
342 *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
343 if (*rhs)
344 return 0;
345 break;
346 }
347 default:
348 return 0;
349 }
350 }
351 return 1;
352}
353
354static inline void hpfs_help(void)
355{
356 printk("\n\
357HPFS filesystem options:\n\
358 help do not mount and display this text\n\
359 uid=xxx set uid of files that don't have uid specified in eas\n\
360 gid=xxx set gid of files that don't have gid specified in eas\n\
361 umask=xxx set mode of files that don't have mode specified in eas\n\
362 case=lower lowercase all files\n\
363 case=asis do not lowercase files (default)\n\
364 conv=binary do not convert CR/LF -> LF (default)\n\
365 conv=auto convert only files with known text extensions\n\
366 conv=text convert all files\n\
367 check=none no fs checks - kernel may crash on corrupted filesystem\n\
368 check=normal do some checks - it should not crash (default)\n\
369 check=strict do extra time-consuming checks, used for debugging\n\
370 errors=continue continue on errors\n\
371 errors=remount-ro remount read-only if errors found (default)\n\
372 errors=panic panic on errors\n\
373 chkdsk=no do not mark fs for chkdsking even if there were errors\n\
374 chkdsk=errors mark fs dirty if errors found (default)\n\
375 chkdsk=always always mark fs dirty - used for debugging\n\
376 eas=no ignore extended attributes\n\
377 eas=ro read but do not write extended attributes\n\
378 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
379 timeshift=nnn add nnn seconds to file times\n\
380\n");
381}
382
383static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
384{
385 uid_t uid;
386 gid_t gid;
387 umode_t umask;
388 int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
389 int o;
390 struct hpfs_sb_info *sbi = hpfs_sb(s);
391
392 *flags |= MS_NOATIME;
393
394 uid = sbi->sb_uid; gid = sbi->sb_gid;
395 umask = 0777 & ~sbi->sb_mode;
396 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv;
397 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk;
398 errs = sbi->sb_err; timeshift = sbi->sb_timeshift;
399
400 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv,
401 &eas, &chk, &errs, &chkdsk, &timeshift))) {
402 printk("HPFS: bad mount options.\n");
403 return 1;
404 }
405 if (o == 2) {
406 hpfs_help();
407 return 1;
408 }
409 if (timeshift != sbi->sb_timeshift) {
410 printk("HPFS: timeshift can't be changed using remount.\n");
411 return 1;
412 }
413
414 unmark_dirty(s);
415
416 sbi->sb_uid = uid; sbi->sb_gid = gid;
417 sbi->sb_mode = 0777 & ~umask;
418 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv;
419 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk;
420 sbi->sb_err = errs; sbi->sb_timeshift = timeshift;
421
422 if (!(*flags & MS_RDONLY)) mark_dirty(s);
423
424 return 0;
425}
426
427/* Super operations */
428
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800429static const struct super_operations hpfs_sops =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430{
431 .alloc_inode = hpfs_alloc_inode,
432 .destroy_inode = hpfs_destroy_inode,
433 .delete_inode = hpfs_delete_inode,
434 .put_super = hpfs_put_super,
435 .statfs = hpfs_statfs,
436 .remount_fs = hpfs_remount_fs,
437};
438
439static int hpfs_fill_super(struct super_block *s, void *options, int silent)
440{
441 struct buffer_head *bh0, *bh1, *bh2;
442 struct hpfs_boot_block *bootblock;
443 struct hpfs_super_block *superblock;
444 struct hpfs_spare_block *spareblock;
445 struct hpfs_sb_info *sbi;
446 struct inode *root;
447
448 uid_t uid;
449 gid_t gid;
450 umode_t umask;
451 int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
452
453 dnode_secno root_dno;
454 struct hpfs_dirent *de = NULL;
455 struct quad_buffer_head qbh;
456
457 int o;
458
Panagiotis Issarisf8314dc2006-09-27 01:49:37 -0700459 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 if (!sbi)
461 return -ENOMEM;
462 s->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
464 sbi->sb_bmp_dir = NULL;
465 sbi->sb_cp_table = NULL;
466
467 init_MUTEX(&sbi->hpfs_creation_de);
468
469 uid = current->uid;
470 gid = current->gid;
471 umask = current->fs->umask;
472 lowercase = 0;
473 conv = CONV_BINARY;
474 eas = 2;
475 chk = 1;
476 errs = 1;
477 chkdsk = 1;
478 timeshift = 0;
479
480 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv,
481 &eas, &chk, &errs, &chkdsk, &timeshift))) {
482 printk("HPFS: bad mount options.\n");
483 goto bail0;
484 }
485 if (o==2) {
486 hpfs_help();
487 goto bail0;
488 }
489
490 /*sbi->sb_mounting = 1;*/
491 sb_set_blocksize(s, 512);
492 sbi->sb_fs_size = -1;
493 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
494 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
495 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
496
497 /* Check magics */
498 if (/*bootblock->magic != BB_MAGIC
499 ||*/ superblock->magic != SB_MAGIC
500 || spareblock->magic != SP_MAGIC) {
501 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n");
502 goto bail4;
503 }
504
505 /* Check version */
506 if (!(s->s_flags & MS_RDONLY) &&
507 superblock->funcversion != 2 && superblock->funcversion != 3) {
508 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n",
509 (int)superblock->version, (int)superblock->funcversion);
510 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");
511 goto bail4;
512 }
513
514 s->s_flags |= MS_NOATIME;
515
516 /* Fill superblock stuff */
517 s->s_magic = HPFS_SUPER_MAGIC;
518 s->s_op = &hpfs_sops;
519
520 sbi->sb_root = superblock->root;
521 sbi->sb_fs_size = superblock->n_sectors;
522 sbi->sb_bitmaps = superblock->bitmaps;
523 sbi->sb_dirband_start = superblock->dir_band_start;
524 sbi->sb_dirband_size = superblock->n_dir_band;
525 sbi->sb_dmap = superblock->dir_band_bitmap;
526 sbi->sb_uid = uid;
527 sbi->sb_gid = gid;
528 sbi->sb_mode = 0777 & ~umask;
529 sbi->sb_n_free = -1;
530 sbi->sb_n_free_dnodes = -1;
531 sbi->sb_lowercase = lowercase;
532 sbi->sb_conv = conv;
533 sbi->sb_eas = eas;
534 sbi->sb_chk = chk;
535 sbi->sb_chkdsk = chkdsk;
536 sbi->sb_err = errs;
537 sbi->sb_timeshift = timeshift;
538 sbi->sb_was_error = 0;
539 sbi->sb_cp_table = NULL;
540 sbi->sb_c_bitmap = -1;
541 sbi->sb_max_fwd_alloc = 0xffffff;
542
543 /* Load bitmap directory */
544 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps)))
545 goto bail4;
546
547 /* Check for general fs errors*/
548 if (spareblock->dirty && !spareblock->old_wrote) {
549 if (errs == 2) {
550 printk("HPFS: Improperly stopped, not mounted\n");
551 goto bail4;
552 }
553 hpfs_error(s, "improperly stopped");
554 }
555
556 if (!(s->s_flags & MS_RDONLY)) {
557 spareblock->dirty = 1;
558 spareblock->old_wrote = 0;
559 mark_buffer_dirty(bh2);
560 }
561
562 if (spareblock->hotfixes_used || spareblock->n_spares_used) {
563 if (errs >= 2) {
564 printk("HPFS: Hotfixes not supported here, try chkdsk\n");
565 mark_dirty(s);
566 goto bail4;
567 }
568 hpfs_error(s, "hotfixes not supported here, try chkdsk");
569 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n");
570 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n");
571 }
572 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) {
573 if (errs >= 2) {
574 printk("HPFS: Spare dnodes used, try chkdsk\n");
575 mark_dirty(s);
576 goto bail4;
577 }
578 hpfs_error(s, "warning: spare dnodes used, try chkdsk");
579 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
580 }
581 if (chk) {
582 unsigned a;
583 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band ||
584 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) {
585 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
586 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band);
587 goto bail4;
588 }
589 a = sbi->sb_dirband_size;
590 sbi->sb_dirband_size = 0;
591 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") ||
592 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") ||
593 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) {
594 mark_dirty(s);
595 goto bail4;
596 }
597 sbi->sb_dirband_size = a;
598 } else printk("HPFS: You really don't want any checks? You are crazy...\n");
599
600 /* Load code page table */
601 if (spareblock->n_code_pages)
602 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir)))
603 printk("HPFS: Warning: code page support is disabled\n");
604
605 brelse(bh2);
606 brelse(bh1);
607 brelse(bh0);
608
609 root = iget_locked(s, sbi->sb_root);
610 if (!root)
611 goto bail0;
612 hpfs_init_inode(root);
613 hpfs_read_inode(root);
614 unlock_new_inode(root);
615 s->s_root = d_alloc_root(root);
616 if (!s->s_root) {
617 iput(root);
618 goto bail0;
619 }
620 hpfs_set_dentry_operations(s->s_root);
621
622 /*
623 * find the root directory's . pointer & finish filling in the inode
624 */
625
626 root_dno = hpfs_fnode_dno(s, sbi->sb_root);
627 if (root_dno)
628 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
629 if (!de)
630 hpfs_error(s, "unable to find root dir");
631 else {
632 root->i_atime.tv_sec = local_to_gmt(s, de->read_date);
633 root->i_atime.tv_nsec = 0;
634 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date);
635 root->i_mtime.tv_nsec = 0;
636 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date);
637 root->i_ctime.tv_nsec = 0;
638 hpfs_i(root)->i_ea_size = de->ea_size;
639 hpfs_i(root)->i_parent_dir = root->i_ino;
640 if (root->i_size == -1)
641 root->i_size = 2048;
642 if (root->i_blocks == -1)
643 root->i_blocks = 5;
644 hpfs_brelse4(&qbh);
645 }
646 return 0;
647
648bail4: brelse(bh2);
649bail3: brelse(bh1);
650bail2: brelse(bh0);
651bail1:
652bail0:
Jesper Juhlf99d49a2005-11-07 01:01:34 -0800653 kfree(sbi->sb_bmp_dir);
654 kfree(sbi->sb_cp_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 s->s_fs_info = NULL;
656 kfree(sbi);
657 return -EINVAL;
658}
659
David Howells454e2392006-06-23 02:02:57 -0700660static int hpfs_get_sb(struct file_system_type *fs_type,
661 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662{
David Howells454e2392006-06-23 02:02:57 -0700663 return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super,
664 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665}
666
667static struct file_system_type hpfs_fs_type = {
668 .owner = THIS_MODULE,
669 .name = "hpfs",
670 .get_sb = hpfs_get_sb,
671 .kill_sb = kill_block_super,
672 .fs_flags = FS_REQUIRES_DEV,
673};
674
675static int __init init_hpfs_fs(void)
676{
677 int err = init_inodecache();
678 if (err)
679 goto out1;
680 err = register_filesystem(&hpfs_fs_type);
681 if (err)
682 goto out;
683 return 0;
684out:
685 destroy_inodecache();
686out1:
687 return err;
688}
689
690static void __exit exit_hpfs_fs(void)
691{
692 unregister_filesystem(&hpfs_fs_type);
693 destroy_inodecache();
694}
695
696module_init(init_hpfs_fs)
697module_exit(exit_hpfs_fs)
698MODULE_LICENSE("GPL");