VM: Remove "clear_page_dirty()" and "test_clear_page_dirty()" functions
[linux-2.6] / fs / hpfs / super.c
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
16 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
17
18 static 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
35 static 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... */
49 static char err_buf[1024];
50
51 void hpfs_error(struct super_block *s, const char *fmt, ...)
52 {
53         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);
60         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");
75         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
86 int 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
98 static void hpfs_put_super(struct super_block *s)
99 {
100         struct hpfs_sb_info *sbi = hpfs_sb(s);
101         kfree(sbi->sb_cp_table);
102         kfree(sbi->sb_bmp_dir);
103         unmark_dirty(s);
104         s->s_fs_info = NULL;
105         kfree(sbi);
106 }
107
108 unsigned 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
124 static 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
134 static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
135 {
136         struct super_block *s = dentry->d_sb;
137         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
158 static struct kmem_cache * hpfs_inode_cachep;
159
160 static struct inode *hpfs_alloc_inode(struct super_block *sb)
161 {
162         struct hpfs_inode_info *ei;
163         ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS);
164         if (!ei)
165                 return NULL;
166         ei->vfs_inode.i_version = 1;
167         return &ei->vfs_inode;
168 }
169
170 static void hpfs_destroy_inode(struct inode *inode)
171 {
172         kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
173 }
174
175 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
176 {
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) {
181                 mutex_init(&ei->i_mutex);
182                 mutex_init(&ei->i_parent_mutex);
183                 inode_init_once(&ei->vfs_inode);
184         }
185 }
186  
187 static int init_inodecache(void)
188 {
189         hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache",
190                                              sizeof(struct hpfs_inode_info),
191                                              0, (SLAB_RECLAIM_ACCOUNT|
192                                                 SLAB_MEM_SPREAD),
193                                              init_once, NULL);
194         if (hpfs_inode_cachep == NULL)
195                 return -ENOMEM;
196         return 0;
197 }
198
199 static void destroy_inodecache(void)
200 {
201         kmem_cache_destroy(hpfs_inode_cachep);
202 }
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
210 enum {
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
220 static 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
246 static 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
354 static inline void hpfs_help(void)
355 {
356         printk("\n\
357 HPFS 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
383 static 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
429 static struct super_operations hpfs_sops =
430 {
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
439 static 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
459         sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
460         if (!sbi)
461                 return -ENOMEM;
462         s->s_fs_info = sbi;
463
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
648 bail4:  brelse(bh2);
649 bail3:  brelse(bh1);
650 bail2:  brelse(bh0);
651 bail1:
652 bail0:
653         kfree(sbi->sb_bmp_dir);
654         kfree(sbi->sb_cp_table);
655         s->s_fs_info = NULL;
656         kfree(sbi);
657         return -EINVAL;
658 }
659
660 static int hpfs_get_sb(struct file_system_type *fs_type,
661         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
662 {
663         return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super,
664                            mnt);
665 }
666
667 static 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
675 static 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;
684 out:
685         destroy_inodecache();
686 out1:
687         return err;
688 }
689
690 static void __exit exit_hpfs_fs(void)
691 {
692         unregister_filesystem(&hpfs_fs_type);
693         destroy_inodecache();
694 }
695
696 module_init(init_hpfs_fs)
697 module_exit(exit_hpfs_fs)
698 MODULE_LICENSE("GPL");