blob: fecf402d7b8a42ce7f7bf4b1595e71f51d5b88b5 [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>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040015#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
17/* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
18
19static 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
36static 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... */
Alexey Dobriyan352d94d2006-12-06 20:37:04 -080050static char err_buf[1024];
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Alexey Dobriyan352d94d2006-12-06 20:37:04 -080052void hpfs_error(struct super_block *s, const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -070053{
Alexey Dobriyan352d94d2006-12-06 20:37:04 -080054 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 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");
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 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
87int 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
99static void hpfs_put_super(struct super_block *s)
100{
101 struct hpfs_sb_info *sbi = hpfs_sb(s);
Jesper Juhlf99d49a2005-11-07 01:01:34 -0800102 kfree(sbi->sb_cp_table);
103 kfree(sbi->sb_bmp_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 unmark_dirty(s);
105 s->s_fs_info = NULL;
106 kfree(sbi);
107}
108
109unsigned 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
125static 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
David Howells726c3342006-06-23 02:02:58 -0700135static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136{
David Howells726c3342006-06-23 02:02:58 -0700137 struct super_block *s = dentry->d_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 struct hpfs_sb_info *sbi = hpfs_sb(s);
Coly Li604d2952009-04-02 16:59:37 -0700139 u64 id = huge_encode_dev(s->s_bdev->bd_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 lock_kernel();
141
142 /*if (sbi->sb_n_free == -1) {*/
143 sbi->sb_n_free = count_bitmaps(s);
144 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap);
145 /*}*/
146 buf->f_type = s->s_magic;
147 buf->f_bsize = 512;
148 buf->f_blocks = sbi->sb_fs_size;
149 buf->f_bfree = sbi->sb_n_free;
150 buf->f_bavail = sbi->sb_n_free;
151 buf->f_files = sbi->sb_dirband_size / 4;
152 buf->f_ffree = sbi->sb_n_free_dnodes;
Coly Li604d2952009-04-02 16:59:37 -0700153 buf->f_fsid.val[0] = (u32)id;
154 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 buf->f_namelen = 254;
156
157 unlock_kernel();
158
159 return 0;
160}
161
Christoph Lametere18b8902006-12-06 20:33:20 -0800162static struct kmem_cache * hpfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164static struct inode *hpfs_alloc_inode(struct super_block *sb)
165{
166 struct hpfs_inode_info *ei;
Christoph Lametere6b4f8d2006-12-06 20:33:14 -0800167 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 if (!ei)
169 return NULL;
170 ei->vfs_inode.i_version = 1;
171 return &ei->vfs_inode;
172}
173
174static void hpfs_destroy_inode(struct inode *inode)
175{
176 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
177}
178
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700179static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180{
181 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
182
Christoph Lametera35afb82007-05-16 22:10:57 -0700183 mutex_init(&ei->i_mutex);
184 mutex_init(&ei->i_parent_mutex);
185 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186}
Paul Mundt20c2df82007-07-20 10:11:58 +0900187
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188static int init_inodecache(void)
189{
190 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache",
191 sizeof(struct hpfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800192 0, (SLAB_RECLAIM_ACCOUNT|
193 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900194 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 if (hpfs_inode_cachep == NULL)
196 return -ENOMEM;
197 return 0;
198}
199
200static void destroy_inodecache(void)
201{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700202 kmem_cache_destroy(hpfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203}
204
205/*
206 * A tiny parser for option strings, stolen from dosfs.
207 * Stolen again from read-only hpfs.
208 * And updated for table-driven option parsing.
209 */
210
211enum {
212 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis,
213 Opt_conv_binary, Opt_conv_text, Opt_conv_auto,
214 Opt_check_none, Opt_check_normal, Opt_check_strict,
215 Opt_err_cont, Opt_err_ro, Opt_err_panic,
216 Opt_eas_no, Opt_eas_ro, Opt_eas_rw,
217 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always,
218 Opt_timeshift, Opt_err,
219};
220
Steven Whitehousea447c092008-10-13 10:46:57 +0100221static const match_table_t tokens = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 {Opt_help, "help"},
223 {Opt_uid, "uid=%u"},
224 {Opt_gid, "gid=%u"},
225 {Opt_umask, "umask=%o"},
226 {Opt_case_lower, "case=lower"},
227 {Opt_case_asis, "case=asis"},
228 {Opt_conv_binary, "conv=binary"},
229 {Opt_conv_text, "conv=text"},
230 {Opt_conv_auto, "conv=auto"},
231 {Opt_check_none, "check=none"},
232 {Opt_check_normal, "check=normal"},
233 {Opt_check_strict, "check=strict"},
234 {Opt_err_cont, "errors=continue"},
235 {Opt_err_ro, "errors=remount-ro"},
236 {Opt_err_panic, "errors=panic"},
237 {Opt_eas_no, "eas=no"},
238 {Opt_eas_ro, "eas=ro"},
239 {Opt_eas_rw, "eas=rw"},
240 {Opt_chkdsk_no, "chkdsk=no"},
241 {Opt_chkdsk_errors, "chkdsk=errors"},
242 {Opt_chkdsk_always, "chkdsk=always"},
243 {Opt_timeshift, "timeshift=%d"},
244 {Opt_err, NULL},
245};
246
247static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask,
248 int *lowercase, int *conv, int *eas, int *chk, int *errs,
249 int *chkdsk, int *timeshift)
250{
251 char *p;
252 int option;
253
254 if (!opts)
255 return 1;
256
257 /*printk("Parsing opts: '%s'\n",opts);*/
258
259 while ((p = strsep(&opts, ",")) != NULL) {
260 substring_t args[MAX_OPT_ARGS];
261 int token;
262 if (!*p)
263 continue;
264
265 token = match_token(p, tokens, args);
266 switch (token) {
267 case Opt_help:
268 return 2;
269 case Opt_uid:
270 if (match_int(args, &option))
271 return 0;
272 *uid = option;
273 break;
274 case Opt_gid:
275 if (match_int(args, &option))
276 return 0;
277 *gid = option;
278 break;
279 case Opt_umask:
280 if (match_octal(args, &option))
281 return 0;
282 *umask = option;
283 break;
284 case Opt_case_lower:
285 *lowercase = 1;
286 break;
287 case Opt_case_asis:
288 *lowercase = 0;
289 break;
290 case Opt_conv_binary:
291 *conv = CONV_BINARY;
292 break;
293 case Opt_conv_text:
294 *conv = CONV_TEXT;
295 break;
296 case Opt_conv_auto:
297 *conv = CONV_AUTO;
298 break;
299 case Opt_check_none:
300 *chk = 0;
301 break;
302 case Opt_check_normal:
303 *chk = 1;
304 break;
305 case Opt_check_strict:
306 *chk = 2;
307 break;
308 case Opt_err_cont:
309 *errs = 0;
310 break;
311 case Opt_err_ro:
312 *errs = 1;
313 break;
314 case Opt_err_panic:
315 *errs = 2;
316 break;
317 case Opt_eas_no:
318 *eas = 0;
319 break;
320 case Opt_eas_ro:
321 *eas = 1;
322 break;
323 case Opt_eas_rw:
324 *eas = 2;
325 break;
326 case Opt_chkdsk_no:
327 *chkdsk = 0;
328 break;
329 case Opt_chkdsk_errors:
330 *chkdsk = 1;
331 break;
332 case Opt_chkdsk_always:
333 *chkdsk = 2;
334 break;
335 case Opt_timeshift:
336 {
337 int m = 1;
338 char *rhs = args[0].from;
339 if (!rhs || !*rhs)
340 return 0;
341 if (*rhs == '-') m = -1;
342 if (*rhs == '+' || *rhs == '-') rhs++;
343 *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
344 if (*rhs)
345 return 0;
346 break;
347 }
348 default:
349 return 0;
350 }
351 }
352 return 1;
353}
354
355static inline void hpfs_help(void)
356{
357 printk("\n\
358HPFS filesystem options:\n\
359 help do not mount and display this text\n\
360 uid=xxx set uid of files that don't have uid specified in eas\n\
361 gid=xxx set gid of files that don't have gid specified in eas\n\
362 umask=xxx set mode of files that don't have mode specified in eas\n\
363 case=lower lowercase all files\n\
364 case=asis do not lowercase files (default)\n\
365 conv=binary do not convert CR/LF -> LF (default)\n\
366 conv=auto convert only files with known text extensions\n\
367 conv=text convert all files\n\
368 check=none no fs checks - kernel may crash on corrupted filesystem\n\
369 check=normal do some checks - it should not crash (default)\n\
370 check=strict do extra time-consuming checks, used for debugging\n\
371 errors=continue continue on errors\n\
372 errors=remount-ro remount read-only if errors found (default)\n\
373 errors=panic panic on errors\n\
374 chkdsk=no do not mark fs for chkdsking even if there were errors\n\
375 chkdsk=errors mark fs dirty if errors found (default)\n\
376 chkdsk=always always mark fs dirty - used for debugging\n\
377 eas=no ignore extended attributes\n\
378 eas=ro read but do not write extended attributes\n\
379 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
380 timeshift=nnn add nnn seconds to file times\n\
381\n");
382}
383
384static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
385{
386 uid_t uid;
387 gid_t gid;
388 umode_t umask;
389 int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
390 int o;
391 struct hpfs_sb_info *sbi = hpfs_sb(s);
Miklos Szeredi6d9c1fd2008-02-08 04:21:44 -0800392 char *new_opts = kstrdup(data, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
394 *flags |= MS_NOATIME;
395
396 uid = sbi->sb_uid; gid = sbi->sb_gid;
397 umask = 0777 & ~sbi->sb_mode;
398 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv;
399 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk;
400 errs = sbi->sb_err; timeshift = sbi->sb_timeshift;
401
402 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv,
403 &eas, &chk, &errs, &chkdsk, &timeshift))) {
404 printk("HPFS: bad mount options.\n");
Miklos Szeredi6d9c1fd2008-02-08 04:21:44 -0800405 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 }
407 if (o == 2) {
408 hpfs_help();
Miklos Szeredi6d9c1fd2008-02-08 04:21:44 -0800409 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 }
411 if (timeshift != sbi->sb_timeshift) {
412 printk("HPFS: timeshift can't be changed using remount.\n");
Miklos Szeredi6d9c1fd2008-02-08 04:21:44 -0800413 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 }
415
416 unmark_dirty(s);
417
418 sbi->sb_uid = uid; sbi->sb_gid = gid;
419 sbi->sb_mode = 0777 & ~umask;
420 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv;
421 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk;
422 sbi->sb_err = errs; sbi->sb_timeshift = timeshift;
423
424 if (!(*flags & MS_RDONLY)) mark_dirty(s);
425
Miklos Szeredi6d9c1fd2008-02-08 04:21:44 -0800426 kfree(s->s_options);
427 s->s_options = new_opts;
428
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 return 0;
Miklos Szeredi6d9c1fd2008-02-08 04:21:44 -0800430
431out_err:
432 kfree(new_opts);
433 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434}
435
436/* Super operations */
437
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800438static const struct super_operations hpfs_sops =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439{
440 .alloc_inode = hpfs_alloc_inode,
441 .destroy_inode = hpfs_destroy_inode,
442 .delete_inode = hpfs_delete_inode,
443 .put_super = hpfs_put_super,
444 .statfs = hpfs_statfs,
445 .remount_fs = hpfs_remount_fs,
Miklos Szeredi6d9c1fd2008-02-08 04:21:44 -0800446 .show_options = generic_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447};
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, conv, 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
Miklos Szeredi6d9c1fd2008-02-08 04:21:44 -0800469 save_mount_options(s, options);
470
Panagiotis Issarisf8314dc2006-09-27 01:49:37 -0700471 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 if (!sbi)
473 return -ENOMEM;
474 s->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
476 sbi->sb_bmp_dir = NULL;
477 sbi->sb_cp_table = NULL;
478
479 init_MUTEX(&sbi->hpfs_creation_de);
480
David Howellsde395b82008-11-14 10:38:55 +1100481 uid = current_uid();
482 gid = current_gid();
Al Viroce3b0f82009-03-29 19:08:22 -0400483 umask = current_umask();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 lowercase = 0;
485 conv = CONV_BINARY;
486 eas = 2;
487 chk = 1;
488 errs = 1;
489 chkdsk = 1;
490 timeshift = 0;
491
492 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv,
493 &eas, &chk, &errs, &chkdsk, &timeshift))) {
494 printk("HPFS: bad mount options.\n");
495 goto bail0;
496 }
497 if (o==2) {
498 hpfs_help();
499 goto bail0;
500 }
501
502 /*sbi->sb_mounting = 1;*/
503 sb_set_blocksize(s, 512);
504 sbi->sb_fs_size = -1;
505 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
506 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
507 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
508
509 /* Check magics */
510 if (/*bootblock->magic != BB_MAGIC
511 ||*/ superblock->magic != SB_MAGIC
512 || spareblock->magic != SP_MAGIC) {
513 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n");
514 goto bail4;
515 }
516
517 /* Check version */
518 if (!(s->s_flags & MS_RDONLY) &&
519 superblock->funcversion != 2 && superblock->funcversion != 3) {
520 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n",
521 (int)superblock->version, (int)superblock->funcversion);
522 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");
523 goto bail4;
524 }
525
526 s->s_flags |= MS_NOATIME;
527
528 /* Fill superblock stuff */
529 s->s_magic = HPFS_SUPER_MAGIC;
530 s->s_op = &hpfs_sops;
531
532 sbi->sb_root = superblock->root;
533 sbi->sb_fs_size = superblock->n_sectors;
534 sbi->sb_bitmaps = superblock->bitmaps;
535 sbi->sb_dirband_start = superblock->dir_band_start;
536 sbi->sb_dirband_size = superblock->n_dir_band;
537 sbi->sb_dmap = superblock->dir_band_bitmap;
538 sbi->sb_uid = uid;
539 sbi->sb_gid = gid;
540 sbi->sb_mode = 0777 & ~umask;
541 sbi->sb_n_free = -1;
542 sbi->sb_n_free_dnodes = -1;
543 sbi->sb_lowercase = lowercase;
544 sbi->sb_conv = conv;
545 sbi->sb_eas = eas;
546 sbi->sb_chk = chk;
547 sbi->sb_chkdsk = chkdsk;
548 sbi->sb_err = errs;
549 sbi->sb_timeshift = timeshift;
550 sbi->sb_was_error = 0;
551 sbi->sb_cp_table = NULL;
552 sbi->sb_c_bitmap = -1;
553 sbi->sb_max_fwd_alloc = 0xffffff;
554
555 /* Load bitmap directory */
556 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps)))
557 goto bail4;
558
559 /* Check for general fs errors*/
560 if (spareblock->dirty && !spareblock->old_wrote) {
561 if (errs == 2) {
562 printk("HPFS: Improperly stopped, not mounted\n");
563 goto bail4;
564 }
565 hpfs_error(s, "improperly stopped");
566 }
567
568 if (!(s->s_flags & MS_RDONLY)) {
569 spareblock->dirty = 1;
570 spareblock->old_wrote = 0;
571 mark_buffer_dirty(bh2);
572 }
573
574 if (spareblock->hotfixes_used || spareblock->n_spares_used) {
575 if (errs >= 2) {
576 printk("HPFS: Hotfixes not supported here, try chkdsk\n");
577 mark_dirty(s);
578 goto bail4;
579 }
580 hpfs_error(s, "hotfixes not supported here, try chkdsk");
581 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n");
582 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n");
583 }
584 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) {
585 if (errs >= 2) {
586 printk("HPFS: Spare dnodes used, try chkdsk\n");
587 mark_dirty(s);
588 goto bail4;
589 }
590 hpfs_error(s, "warning: spare dnodes used, try chkdsk");
591 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
592 }
593 if (chk) {
594 unsigned a;
595 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band ||
596 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) {
597 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
598 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band);
599 goto bail4;
600 }
601 a = sbi->sb_dirband_size;
602 sbi->sb_dirband_size = 0;
603 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") ||
604 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") ||
605 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) {
606 mark_dirty(s);
607 goto bail4;
608 }
609 sbi->sb_dirband_size = a;
610 } else printk("HPFS: You really don't want any checks? You are crazy...\n");
611
612 /* Load code page table */
613 if (spareblock->n_code_pages)
614 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir)))
615 printk("HPFS: Warning: code page support is disabled\n");
616
617 brelse(bh2);
618 brelse(bh1);
619 brelse(bh0);
620
621 root = iget_locked(s, sbi->sb_root);
622 if (!root)
623 goto bail0;
624 hpfs_init_inode(root);
625 hpfs_read_inode(root);
626 unlock_new_inode(root);
627 s->s_root = d_alloc_root(root);
628 if (!s->s_root) {
629 iput(root);
630 goto bail0;
631 }
632 hpfs_set_dentry_operations(s->s_root);
633
634 /*
635 * find the root directory's . pointer & finish filling in the inode
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, de->read_date);
645 root->i_atime.tv_nsec = 0;
646 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date);
647 root->i_mtime.tv_nsec = 0;
648 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date);
649 root->i_ctime.tv_nsec = 0;
650 hpfs_i(root)->i_ea_size = 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 return 0;
659
660bail4: brelse(bh2);
661bail3: brelse(bh1);
662bail2: brelse(bh0);
663bail1:
664bail0:
Jesper Juhlf99d49a2005-11-07 01:01:34 -0800665 kfree(sbi->sb_bmp_dir);
666 kfree(sbi->sb_cp_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 s->s_fs_info = NULL;
668 kfree(sbi);
669 return -EINVAL;
670}
671
David Howells454e2392006-06-23 02:02:57 -0700672static int hpfs_get_sb(struct file_system_type *fs_type,
673 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674{
David Howells454e2392006-06-23 02:02:57 -0700675 return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super,
676 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677}
678
679static struct file_system_type hpfs_fs_type = {
680 .owner = THIS_MODULE,
681 .name = "hpfs",
682 .get_sb = hpfs_get_sb,
683 .kill_sb = kill_block_super,
684 .fs_flags = FS_REQUIRES_DEV,
685};
686
687static int __init init_hpfs_fs(void)
688{
689 int err = init_inodecache();
690 if (err)
691 goto out1;
692 err = register_filesystem(&hpfs_fs_type);
693 if (err)
694 goto out;
695 return 0;
696out:
697 destroy_inodecache();
698out1:
699 return err;
700}
701
702static void __exit exit_hpfs_fs(void)
703{
704 unregister_filesystem(&hpfs_fs_type);
705 destroy_inodecache();
706}
707
708module_init(init_hpfs_fs)
709module_exit(exit_hpfs_fs)
710MODULE_LICENSE("GPL");