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14#include <linux/init.h>
15#include <linux/module.h>
16
17#include <linux/slab.h>
18#include <linux/nls.h>
19#include <linux/ctype.h>
20#include <linux/smp_lock.h>
21#include <linux/statfs.h>
22#include <linux/cdrom.h>
23#include <linux/parser.h>
24
25#include "isofs.h"
26#include "zisofs.h"
27
28#define BEQUIET
29
30static int isofs_hashi(struct dentry *parent, struct qstr *qstr);
31static int isofs_hash(struct dentry *parent, struct qstr *qstr);
32static int isofs_dentry_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b);
33static int isofs_dentry_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b);
34
35#ifdef CONFIG_JOLIET
36static int isofs_hashi_ms(struct dentry *parent, struct qstr *qstr);
37static int isofs_hash_ms(struct dentry *parent, struct qstr *qstr);
38static int isofs_dentry_cmpi_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
39static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
40#endif
41
42static void isofs_put_super(struct super_block *sb)
43{
44 struct isofs_sb_info *sbi = ISOFS_SB(sb);
45
46#ifdef CONFIG_JOLIET
47 lock_kernel();
48
49 unload_nls(sbi->s_nls_iocharset);
50
51 unlock_kernel();
52#endif
53
54 kfree(sbi);
55 sb->s_fs_info = NULL;
56 return;
57}
58
59static int isofs_read_inode(struct inode *);
60static int isofs_statfs (struct dentry *, struct kstatfs *);
61
62static struct kmem_cache *isofs_inode_cachep;
63
64static struct inode *isofs_alloc_inode(struct super_block *sb)
65{
66 struct iso_inode_info *ei;
67 ei = kmem_cache_alloc(isofs_inode_cachep, GFP_KERNEL);
68 if (!ei)
69 return NULL;
70 return &ei->vfs_inode;
71}
72
73static void isofs_destroy_inode(struct inode *inode)
74{
75 kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
76}
77
78static void init_once(void *foo)
79{
80 struct iso_inode_info *ei = foo;
81
82 inode_init_once(&ei->vfs_inode);
83}
84
85static int init_inodecache(void)
86{
87 isofs_inode_cachep = kmem_cache_create("isofs_inode_cache",
88 sizeof(struct iso_inode_info),
89 0, (SLAB_RECLAIM_ACCOUNT|
90 SLAB_MEM_SPREAD),
91 init_once);
92 if (isofs_inode_cachep == NULL)
93 return -ENOMEM;
94 return 0;
95}
96
97static void destroy_inodecache(void)
98{
99 kmem_cache_destroy(isofs_inode_cachep);
100}
101
102static int isofs_remount(struct super_block *sb, int *flags, char *data)
103{
104
105 *flags |= MS_RDONLY;
106 return 0;
107}
108
109static const struct super_operations isofs_sops = {
110 .alloc_inode = isofs_alloc_inode,
111 .destroy_inode = isofs_destroy_inode,
112 .put_super = isofs_put_super,
113 .statfs = isofs_statfs,
114 .remount_fs = isofs_remount,
115 .show_options = generic_show_options,
116};
117
118
119static const struct dentry_operations isofs_dentry_ops[] = {
120 {
121 .d_hash = isofs_hash,
122 .d_compare = isofs_dentry_cmp,
123 },
124 {
125 .d_hash = isofs_hashi,
126 .d_compare = isofs_dentry_cmpi,
127 },
128#ifdef CONFIG_JOLIET
129 {
130 .d_hash = isofs_hash_ms,
131 .d_compare = isofs_dentry_cmp_ms,
132 },
133 {
134 .d_hash = isofs_hashi_ms,
135 .d_compare = isofs_dentry_cmpi_ms,
136 },
137#endif
138};
139
140struct iso9660_options{
141 unsigned int rock:1;
142 unsigned int joliet:1;
143 unsigned int cruft:1;
144 unsigned int hide:1;
145 unsigned int showassoc:1;
146 unsigned int nocompress:1;
147 unsigned int overriderockperm:1;
148 unsigned int uid_set:1;
149 unsigned int gid_set:1;
150 unsigned int utf8:1;
151 unsigned char map;
152 unsigned char check;
153 unsigned int blocksize;
154 mode_t fmode;
155 mode_t dmode;
156 gid_t gid;
157 uid_t uid;
158 char *iocharset;
159
160 s32 session;
161 s32 sbsector;
162};
163
164
165
166
167static int
168isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms)
169{
170 const char *name;
171 int len;
172
173 len = qstr->len;
174 name = qstr->name;
175 if (ms) {
176 while (len && name[len-1] == '.')
177 len--;
178 }
179
180 qstr->hash = full_name_hash(name, len);
181
182 return 0;
183}
184
185
186
187
188static int
189isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms)
190{
191 const char *name;
192 int len;
193 char c;
194 unsigned long hash;
195
196 len = qstr->len;
197 name = qstr->name;
198 if (ms) {
199 while (len && name[len-1] == '.')
200 len--;
201 }
202
203 hash = init_name_hash();
204 while (len--) {
205 c = tolower(*name++);
206 hash = partial_name_hash(c, hash);
207 }
208 qstr->hash = end_name_hash(hash);
209
210 return 0;
211}
212
213
214
215
216static int isofs_dentry_cmpi_common(struct dentry *dentry, struct qstr *a,
217 struct qstr *b, int ms)
218{
219 int alen, blen;
220
221
222 alen = a->len;
223 blen = b->len;
224 if (ms) {
225 while (alen && a->name[alen-1] == '.')
226 alen--;
227 while (blen && b->name[blen-1] == '.')
228 blen--;
229 }
230 if (alen == blen) {
231 if (strnicmp(a->name, b->name, alen) == 0)
232 return 0;
233 }
234 return 1;
235}
236
237
238
239
240static int isofs_dentry_cmp_common(struct dentry *dentry, struct qstr *a,
241 struct qstr *b, int ms)
242{
243 int alen, blen;
244
245
246 alen = a->len;
247 blen = b->len;
248 if (ms) {
249 while (alen && a->name[alen-1] == '.')
250 alen--;
251 while (blen && b->name[blen-1] == '.')
252 blen--;
253 }
254 if (alen == blen) {
255 if (strncmp(a->name, b->name, alen) == 0)
256 return 0;
257 }
258 return 1;
259}
260
261static int
262isofs_hash(struct dentry *dentry, struct qstr *qstr)
263{
264 return isofs_hash_common(dentry, qstr, 0);
265}
266
267static int
268isofs_hashi(struct dentry *dentry, struct qstr *qstr)
269{
270 return isofs_hashi_common(dentry, qstr, 0);
271}
272
273static int
274isofs_dentry_cmp(struct dentry *dentry,struct qstr *a,struct qstr *b)
275{
276 return isofs_dentry_cmp_common(dentry, a, b, 0);
277}
278
279static int
280isofs_dentry_cmpi(struct dentry *dentry,struct qstr *a,struct qstr *b)
281{
282 return isofs_dentry_cmpi_common(dentry, a, b, 0);
283}
284
285#ifdef CONFIG_JOLIET
286static int
287isofs_hash_ms(struct dentry *dentry, struct qstr *qstr)
288{
289 return isofs_hash_common(dentry, qstr, 1);
290}
291
292static int
293isofs_hashi_ms(struct dentry *dentry, struct qstr *qstr)
294{
295 return isofs_hashi_common(dentry, qstr, 1);
296}
297
298static int
299isofs_dentry_cmp_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
300{
301 return isofs_dentry_cmp_common(dentry, a, b, 1);
302}
303
304static int
305isofs_dentry_cmpi_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
306{
307 return isofs_dentry_cmpi_common(dentry, a, b, 1);
308}
309#endif
310
311enum {
312 Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore,
313 Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet,
314 Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err,
315 Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode, Opt_overriderockperm,
316};
317
318static const match_table_t tokens = {
319 {Opt_norock, "norock"},
320 {Opt_nojoliet, "nojoliet"},
321 {Opt_unhide, "unhide"},
322 {Opt_hide, "hide"},
323 {Opt_showassoc, "showassoc"},
324 {Opt_cruft, "cruft"},
325 {Opt_utf8, "utf8"},
326 {Opt_iocharset, "iocharset=%s"},
327 {Opt_map_a, "map=acorn"},
328 {Opt_map_a, "map=a"},
329 {Opt_map_n, "map=normal"},
330 {Opt_map_n, "map=n"},
331 {Opt_map_o, "map=off"},
332 {Opt_map_o, "map=o"},
333 {Opt_session, "session=%u"},
334 {Opt_sb, "sbsector=%u"},
335 {Opt_check_r, "check=relaxed"},
336 {Opt_check_r, "check=r"},
337 {Opt_check_s, "check=strict"},
338 {Opt_check_s, "check=s"},
339 {Opt_uid, "uid=%u"},
340 {Opt_gid, "gid=%u"},
341 {Opt_mode, "mode=%u"},
342 {Opt_dmode, "dmode=%u"},
343 {Opt_overriderockperm, "overriderockperm"},
344 {Opt_block, "block=%u"},
345 {Opt_ignore, "conv=binary"},
346 {Opt_ignore, "conv=b"},
347 {Opt_ignore, "conv=text"},
348 {Opt_ignore, "conv=t"},
349 {Opt_ignore, "conv=mtext"},
350 {Opt_ignore, "conv=m"},
351 {Opt_ignore, "conv=auto"},
352 {Opt_ignore, "conv=a"},
353 {Opt_nocompress, "nocompress"},
354 {Opt_err, NULL}
355};
356
357static int parse_options(char *options, struct iso9660_options *popt)
358{
359 char *p;
360 int option;
361
362 popt->map = 'n';
363 popt->rock = 1;
364 popt->joliet = 1;
365 popt->cruft = 0;
366 popt->hide = 0;
367 popt->showassoc = 0;
368 popt->check = 'u';
369 popt->nocompress = 0;
370 popt->blocksize = 1024;
371 popt->fmode = popt->dmode = ISOFS_INVALID_MODE;
372 popt->uid_set = 0;
373 popt->gid_set = 0;
374 popt->gid = 0;
375 popt->uid = 0;
376 popt->iocharset = NULL;
377 popt->utf8 = 0;
378 popt->overriderockperm = 0;
379 popt->session=-1;
380 popt->sbsector=-1;
381 if (!options)
382 return 1;
383
384 while ((p = strsep(&options, ",")) != NULL) {
385 int token;
386 substring_t args[MAX_OPT_ARGS];
387 unsigned n;
388
389 if (!*p)
390 continue;
391
392 token = match_token(p, tokens, args);
393 switch (token) {
394 case Opt_norock:
395 popt->rock = 0;
396 break;
397 case Opt_nojoliet:
398 popt->joliet = 0;
399 break;
400 case Opt_hide:
401 popt->hide = 1;
402 break;
403 case Opt_unhide:
404 case Opt_showassoc:
405 popt->showassoc = 1;
406 break;
407 case Opt_cruft:
408 popt->cruft = 1;
409 break;
410 case Opt_utf8:
411 popt->utf8 = 1;
412 break;
413#ifdef CONFIG_JOLIET
414 case Opt_iocharset:
415 popt->iocharset = match_strdup(&args[0]);
416 break;
417#endif
418 case Opt_map_a:
419 popt->map = 'a';
420 break;
421 case Opt_map_o:
422 popt->map = 'o';
423 break;
424 case Opt_map_n:
425 popt->map = 'n';
426 break;
427 case Opt_session:
428 if (match_int(&args[0], &option))
429 return 0;
430 n = option;
431 if (n > 99)
432 return 0;
433 popt->session = n + 1;
434 break;
435 case Opt_sb:
436 if (match_int(&args[0], &option))
437 return 0;
438 popt->sbsector = option;
439 break;
440 case Opt_check_r:
441 popt->check = 'r';
442 break;
443 case Opt_check_s:
444 popt->check = 's';
445 break;
446 case Opt_ignore:
447 break;
448 case Opt_uid:
449 if (match_int(&args[0], &option))
450 return 0;
451 popt->uid = option;
452 popt->uid_set = 1;
453 break;
454 case Opt_gid:
455 if (match_int(&args[0], &option))
456 return 0;
457 popt->gid = option;
458 popt->gid_set = 1;
459 break;
460 case Opt_mode:
461 if (match_int(&args[0], &option))
462 return 0;
463 popt->fmode = option;
464 break;
465 case Opt_dmode:
466 if (match_int(&args[0], &option))
467 return 0;
468 popt->dmode = option;
469 break;
470 case Opt_overriderockperm:
471 popt->overriderockperm = 1;
472 break;
473 case Opt_block:
474 if (match_int(&args[0], &option))
475 return 0;
476 n = option;
477 if (n != 512 && n != 1024 && n != 2048)
478 return 0;
479 popt->blocksize = n;
480 break;
481 case Opt_nocompress:
482 popt->nocompress = 1;
483 break;
484 default:
485 return 0;
486 }
487 }
488 return 1;
489}
490
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499
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501
502
503
504
505
506
507#define WE_OBEY_THE_WRITTEN_STANDARDS 1
508
509static unsigned int isofs_get_last_session(struct super_block *sb, s32 session)
510{
511 struct cdrom_multisession ms_info;
512 unsigned int vol_desc_start;
513 struct block_device *bdev = sb->s_bdev;
514 int i;
515
516 vol_desc_start=0;
517 ms_info.addr_format=CDROM_LBA;
518 if(session >= 0 && session <= 99) {
519 struct cdrom_tocentry Te;
520 Te.cdte_track=session;
521 Te.cdte_format=CDROM_LBA;
522 i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te);
523 if (!i) {
524 printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n",
525 session, Te.cdte_addr.lba,
526 Te.cdte_ctrl&CDROM_DATA_TRACK);
527 if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4)
528 return Te.cdte_addr.lba;
529 }
530
531 printk(KERN_ERR "ISOFS: Invalid session number or type of track\n");
532 }
533 i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info);
534 if (session > 0)
535 printk(KERN_ERR "ISOFS: Invalid session number\n");
536#if 0
537 printk(KERN_DEBUG "isofs.inode: CDROMMULTISESSION: rc=%d\n",i);
538 if (i==0) {
539 printk(KERN_DEBUG "isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no");
540 printk(KERN_DEBUG "isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba);
541 }
542#endif
543 if (i==0)
544#if WE_OBEY_THE_WRITTEN_STANDARDS
545 if (ms_info.xa_flag)
546#endif
547 vol_desc_start=ms_info.addr.lba;
548 return vol_desc_start;
549}
550
551
552
553
554
555
556
557static int isofs_fill_super(struct super_block *s, void *data, int silent)
558{
559 struct buffer_head *bh = NULL, *pri_bh = NULL;
560 struct hs_primary_descriptor *h_pri = NULL;
561 struct iso_primary_descriptor *pri = NULL;
562 struct iso_supplementary_descriptor *sec = NULL;
563 struct iso_directory_record *rootp;
564 struct inode *inode;
565 struct iso9660_options opt;
566 struct isofs_sb_info *sbi;
567 unsigned long first_data_zone;
568 int joliet_level = 0;
569 int iso_blknum, block;
570 int orig_zonesize;
571 int table, error = -EINVAL;
572 unsigned int vol_desc_start;
573
574 save_mount_options(s, data);
575
576 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
577 if (!sbi)
578 return -ENOMEM;
579 s->s_fs_info = sbi;
580
581 if (!parse_options((char *)data, &opt))
582 goto out_freesbi;
583
584
585
586
587
588
589
590
591
592
593 opt.blocksize = sb_min_blocksize(s, opt.blocksize);
594
595 sbi->s_high_sierra = 0;
596
597 vol_desc_start = (opt.sbsector != -1) ?
598 opt.sbsector : isofs_get_last_session(s,opt.session);
599
600 for (iso_blknum = vol_desc_start+16;
601 iso_blknum < vol_desc_start+100; iso_blknum++) {
602 struct hs_volume_descriptor *hdp;
603 struct iso_volume_descriptor *vdp;
604
605 block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits);
606 if (!(bh = sb_bread(s, block)))
607 goto out_no_read;
608
609 vdp = (struct iso_volume_descriptor *)bh->b_data;
610 hdp = (struct hs_volume_descriptor *)bh->b_data;
611
612
613
614
615
616
617 if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
618 if (isonum_711(vdp->type) == ISO_VD_END)
619 break;
620 if (isonum_711(vdp->type) == ISO_VD_PRIMARY) {
621 if (pri == NULL) {
622 pri = (struct iso_primary_descriptor *)vdp;
623
624 pri_bh = bh;
625 bh = NULL;
626 }
627 }
628#ifdef CONFIG_JOLIET
629 else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) {
630 sec = (struct iso_supplementary_descriptor *)vdp;
631 if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) {
632 if (opt.joliet) {
633 if (sec->escape[2] == 0x40)
634 joliet_level = 1;
635 else if (sec->escape[2] == 0x43)
636 joliet_level = 2;
637 else if (sec->escape[2] == 0x45)
638 joliet_level = 3;
639
640 printk(KERN_DEBUG "ISO 9660 Extensions: "
641 "Microsoft Joliet Level %d\n",
642 joliet_level);
643 }
644 goto root_found;
645 } else {
646
647 sec = NULL;
648 }
649 }
650#endif
651 } else {
652 if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) {
653 if (isonum_711(hdp->type) != ISO_VD_PRIMARY)
654 goto out_freebh;
655
656 sbi->s_high_sierra = 1;
657 opt.rock = 0;
658 h_pri = (struct hs_primary_descriptor *)vdp;
659 goto root_found;
660 }
661 }
662
663
664
665 brelse(bh);
666 bh = NULL;
667 }
668
669
670
671
672 if (!pri)
673 goto out_unknown_format;
674 brelse(bh);
675 bh = pri_bh;
676 pri_bh = NULL;
677
678root_found:
679
680 if (joliet_level && (pri == NULL || !opt.rock)) {
681
682
683
684 pri = (struct iso_primary_descriptor *) sec;
685 }
686
687 if(sbi->s_high_sierra){
688 rootp = (struct iso_directory_record *) h_pri->root_directory_record;
689 sbi->s_nzones = isonum_733(h_pri->volume_space_size);
690 sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size);
691 sbi->s_max_size = isonum_733(h_pri->volume_space_size);
692 } else {
693 if (!pri)
694 goto out_freebh;
695 rootp = (struct iso_directory_record *) pri->root_directory_record;
696 sbi->s_nzones = isonum_733(pri->volume_space_size);
697 sbi->s_log_zone_size = isonum_723(pri->logical_block_size);
698 sbi->s_max_size = isonum_733(pri->volume_space_size);
699 }
700
701 sbi->s_ninodes = 0;
702
703 orig_zonesize = sbi->s_log_zone_size;
704
705
706
707
708
709
710
711 if (orig_zonesize < opt.blocksize)
712 goto out_bad_size;
713
714
715 switch (sbi->s_log_zone_size) {
716 case 512: sbi->s_log_zone_size = 9; break;
717 case 1024: sbi->s_log_zone_size = 10; break;
718 case 2048: sbi->s_log_zone_size = 11; break;
719
720 default:
721 goto out_bad_zone_size;
722 }
723
724 s->s_magic = ISOFS_SUPER_MAGIC;
725 s->s_maxbytes = 0xffffffff;
726
727
728
729
730
731
732
733
734 s->s_flags |= MS_RDONLY ;
735
736
737
738
739 first_data_zone = isonum_733(rootp->extent) +
740 isonum_711(rootp->ext_attr_length);
741 sbi->s_firstdatazone = first_data_zone;
742#ifndef BEQUIET
743 printk(KERN_DEBUG "ISOFS: Max size:%ld Log zone size:%ld\n",
744 sbi->s_max_size, 1UL << sbi->s_log_zone_size);
745 printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone);
746 if(sbi->s_high_sierra)
747 printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n");
748#endif
749
750
751
752
753
754
755
756
757
758 if (joliet_level) {
759 pri = (struct iso_primary_descriptor *) sec;
760 rootp = (struct iso_directory_record *)
761 pri->root_directory_record;
762 first_data_zone = isonum_733(rootp->extent) +
763 isonum_711(rootp->ext_attr_length);
764 }
765
766
767
768
769
770 brelse(pri_bh);
771 brelse(bh);
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790 sb_set_blocksize(s, orig_zonesize);
791
792 sbi->s_nls_iocharset = NULL;
793
794#ifdef CONFIG_JOLIET
795 if (joliet_level && opt.utf8 == 0) {
796 char *p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT;
797 sbi->s_nls_iocharset = load_nls(p);
798 if (! sbi->s_nls_iocharset) {
799
800 if (opt.iocharset)
801 goto out_freesbi;
802 sbi->s_nls_iocharset = load_nls_default();
803 }
804 }
805#endif
806 s->s_op = &isofs_sops;
807 s->s_export_op = &isofs_export_ops;
808 sbi->s_mapping = opt.map;
809 sbi->s_rock = (opt.rock ? 2 : 0);
810 sbi->s_rock_offset = -1;
811 sbi->s_cruft = opt.cruft;
812 sbi->s_hide = opt.hide;
813 sbi->s_showassoc = opt.showassoc;
814 sbi->s_uid = opt.uid;
815 sbi->s_gid = opt.gid;
816 sbi->s_uid_set = opt.uid_set;
817 sbi->s_gid_set = opt.gid_set;
818 sbi->s_utf8 = opt.utf8;
819 sbi->s_nocompress = opt.nocompress;
820 sbi->s_overriderockperm = opt.overriderockperm;
821
822
823
824
825
826 if (opt.fmode != ISOFS_INVALID_MODE)
827 sbi->s_fmode = opt.fmode & 0777;
828 else
829 sbi->s_fmode = ISOFS_INVALID_MODE;
830 if (opt.dmode != ISOFS_INVALID_MODE)
831 sbi->s_dmode = opt.dmode & 0777;
832 else
833 sbi->s_dmode = ISOFS_INVALID_MODE;
834
835
836
837
838
839
840 inode = isofs_iget(s, sbi->s_firstdatazone, 0);
841 if (IS_ERR(inode))
842 goto out_no_root;
843
844
845
846
847
848
849
850
851
852 if (sbi->s_rock == 1) {
853 joliet_level = 0;
854 } else if (joliet_level) {
855 sbi->s_rock = 0;
856 if (sbi->s_firstdatazone != first_data_zone) {
857 sbi->s_firstdatazone = first_data_zone;
858 printk(KERN_DEBUG
859 "ISOFS: changing to secondary root\n");
860 iput(inode);
861 inode = isofs_iget(s, sbi->s_firstdatazone, 0);
862 if (IS_ERR(inode))
863 goto out_no_root;
864 }
865 }
866
867 if (opt.check == 'u') {
868
869 if (joliet_level)
870 opt.check = 'r';
871 else
872 opt.check = 's';
873 }
874 sbi->s_joliet_level = joliet_level;
875
876
877 if (!S_ISDIR(inode->i_mode)) {
878 printk(KERN_WARNING
879 "isofs_fill_super: root inode is not a directory. "
880 "Corrupted media?\n");
881 goto out_iput;
882 }
883
884
885 s->s_root = d_alloc_root(inode);
886 if (!(s->s_root))
887 goto out_no_root;
888
889 table = 0;
890 if (joliet_level)
891 table += 2;
892 if (opt.check == 'r')
893 table++;
894 s->s_root->d_op = &isofs_dentry_ops[table];
895
896 kfree(opt.iocharset);
897
898 return 0;
899
900
901
902
903out_iput:
904 iput(inode);
905 goto out_no_inode;
906out_no_root:
907 error = PTR_ERR(inode);
908 if (error != -ENOMEM)
909 printk(KERN_WARNING "%s: get root inode failed\n", __func__);
910out_no_inode:
911#ifdef CONFIG_JOLIET
912 unload_nls(sbi->s_nls_iocharset);
913#endif
914 goto out_freesbi;
915out_no_read:
916 printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n",
917 __func__, s->s_id, iso_blknum, block);
918 goto out_freesbi;
919out_bad_zone_size:
920 printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n",
921 sbi->s_log_zone_size);
922 goto out_freebh;
923out_bad_size:
924 printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n",
925 orig_zonesize, opt.blocksize);
926 goto out_freebh;
927out_unknown_format:
928 if (!silent)
929 printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n");
930
931out_freebh:
932 brelse(bh);
933out_freesbi:
934 kfree(opt.iocharset);
935 kfree(sbi);
936 s->s_fs_info = NULL;
937 return error;
938}
939
940static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf)
941{
942 struct super_block *sb = dentry->d_sb;
943 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
944
945 buf->f_type = ISOFS_SUPER_MAGIC;
946 buf->f_bsize = sb->s_blocksize;
947 buf->f_blocks = (ISOFS_SB(sb)->s_nzones
948 << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits));
949 buf->f_bfree = 0;
950 buf->f_bavail = 0;
951 buf->f_files = ISOFS_SB(sb)->s_ninodes;
952 buf->f_ffree = 0;
953 buf->f_fsid.val[0] = (u32)id;
954 buf->f_fsid.val[1] = (u32)(id >> 32);
955 buf->f_namelen = NAME_MAX;
956 return 0;
957}
958
959
960
961
962
963
964int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
965 struct buffer_head **bh, unsigned long nblocks)
966{
967 unsigned long b_off;
968 unsigned offset, sect_size;
969 unsigned int firstext;
970 unsigned long nextblk, nextoff;
971 long iblock = (long)iblock_s;
972 int section, rv, error;
973 struct iso_inode_info *ei = ISOFS_I(inode);
974
975 lock_kernel();
976
977 error = -EIO;
978 rv = 0;
979 if (iblock < 0 || iblock != iblock_s) {
980 printk(KERN_DEBUG "%s: block number too large\n", __func__);
981 goto abort;
982 }
983
984 b_off = iblock;
985
986 offset = 0;
987 firstext = ei->i_first_extent;
988 sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode);
989 nextblk = ei->i_next_section_block;
990 nextoff = ei->i_next_section_offset;
991 section = 0;
992
993 while (nblocks) {
994
995
996
997
998
999
1000
1001 if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) {
1002 printk(KERN_DEBUG "%s: block >= EOF (%ld, %ld)\n",
1003 __func__, iblock, (unsigned long) inode->i_size);
1004 goto abort;
1005 }
1006
1007
1008
1009
1010
1011 while (nextblk && (b_off >= (offset + sect_size))) {
1012 struct inode *ninode;
1013
1014 offset += sect_size;
1015 ninode = isofs_iget(inode->i_sb, nextblk, nextoff);
1016 if (IS_ERR(ninode)) {
1017 error = PTR_ERR(ninode);
1018 goto abort;
1019 }
1020 firstext = ISOFS_I(ninode)->i_first_extent;
1021 sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode);
1022 nextblk = ISOFS_I(ninode)->i_next_section_block;
1023 nextoff = ISOFS_I(ninode)->i_next_section_offset;
1024 iput(ninode);
1025
1026 if (++section > 100) {
1027 printk(KERN_DEBUG "%s: More than 100 file sections ?!?"
1028 " aborting...\n", __func__);
1029 printk(KERN_DEBUG "%s: block=%ld firstext=%u sect_size=%u "
1030 "nextblk=%lu nextoff=%lu\n", __func__,
1031 iblock, firstext, (unsigned) sect_size,
1032 nextblk, nextoff);
1033 goto abort;
1034 }
1035 }
1036
1037 if (*bh) {
1038 map_bh(*bh, inode->i_sb, firstext + b_off - offset);
1039 } else {
1040 *bh = sb_getblk(inode->i_sb, firstext+b_off-offset);
1041 if (!*bh)
1042 goto abort;
1043 }
1044 bh++;
1045 b_off++;
1046 nblocks--;
1047 rv++;
1048 }
1049
1050 error = 0;
1051abort:
1052 unlock_kernel();
1053 return rv != 0 ? rv : error;
1054}
1055
1056
1057
1058
1059static int isofs_get_block(struct inode *inode, sector_t iblock,
1060 struct buffer_head *bh_result, int create)
1061{
1062 int ret;
1063
1064 if (create) {
1065 printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__);
1066 return -EROFS;
1067 }
1068
1069 ret = isofs_get_blocks(inode, iblock, &bh_result, 1);
1070 return ret < 0 ? ret : 0;
1071}
1072
1073static int isofs_bmap(struct inode *inode, sector_t block)
1074{
1075 struct buffer_head dummy;
1076 int error;
1077
1078 dummy.b_state = 0;
1079 dummy.b_blocknr = -1000;
1080 error = isofs_get_block(inode, block, &dummy, 0);
1081 if (!error)
1082 return dummy.b_blocknr;
1083 return 0;
1084}
1085
1086struct buffer_head *isofs_bread(struct inode *inode, sector_t block)
1087{
1088 sector_t blknr = isofs_bmap(inode, block);
1089 if (!blknr)
1090 return NULL;
1091 return sb_bread(inode->i_sb, blknr);
1092}
1093
1094static int isofs_readpage(struct file *file, struct page *page)
1095{
1096 return block_read_full_page(page,isofs_get_block);
1097}
1098
1099static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
1100{
1101 return generic_block_bmap(mapping,block,isofs_get_block);
1102}
1103
1104static const struct address_space_operations isofs_aops = {
1105 .readpage = isofs_readpage,
1106 .sync_page = block_sync_page,
1107 .bmap = _isofs_bmap
1108};
1109
1110static int isofs_read_level3_size(struct inode *inode)
1111{
1112 unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
1113 int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra;
1114 struct buffer_head *bh = NULL;
1115 unsigned long block, offset, block_saved, offset_saved;
1116 int i = 0;
1117 int more_entries = 0;
1118 struct iso_directory_record *tmpde = NULL;
1119 struct iso_inode_info *ei = ISOFS_I(inode);
1120
1121 inode->i_size = 0;
1122
1123
1124
1125
1126 ei->i_next_section_block = 0;
1127 ei->i_next_section_offset = 0;
1128
1129 block = ei->i_iget5_block;
1130 offset = ei->i_iget5_offset;
1131
1132 do {
1133 struct iso_directory_record *de;
1134 unsigned int de_len;
1135
1136 if (!bh) {
1137 bh = sb_bread(inode->i_sb, block);
1138 if (!bh)
1139 goto out_noread;
1140 }
1141 de = (struct iso_directory_record *) (bh->b_data + offset);
1142 de_len = *(unsigned char *) de;
1143
1144 if (de_len == 0) {
1145 brelse(bh);
1146 bh = NULL;
1147 ++block;
1148 offset = 0;
1149 continue;
1150 }
1151
1152 block_saved = block;
1153 offset_saved = offset;
1154 offset += de_len;
1155
1156
1157 if (offset >= bufsize) {
1158 int slop = bufsize - offset + de_len;
1159 if (!tmpde) {
1160 tmpde = kmalloc(256, GFP_KERNEL);
1161 if (!tmpde)
1162 goto out_nomem;
1163 }
1164 memcpy(tmpde, de, slop);
1165 offset &= bufsize - 1;
1166 block++;
1167 brelse(bh);
1168 bh = NULL;
1169 if (offset) {
1170 bh = sb_bread(inode->i_sb, block);
1171 if (!bh)
1172 goto out_noread;
1173 memcpy((void *)tmpde+slop, bh->b_data, offset);
1174 }
1175 de = tmpde;
1176 }
1177
1178 inode->i_size += isonum_733(de->size);
1179 if (i == 1) {
1180 ei->i_next_section_block = block_saved;
1181 ei->i_next_section_offset = offset_saved;
1182 }
1183
1184 more_entries = de->flags[-high_sierra] & 0x80;
1185
1186 i++;
1187 if (i > 100)
1188 goto out_toomany;
1189 } while (more_entries);
1190out:
1191 kfree(tmpde);
1192 if (bh)
1193 brelse(bh);
1194 return 0;
1195
1196out_nomem:
1197 if (bh)
1198 brelse(bh);
1199 return -ENOMEM;
1200
1201out_noread:
1202 printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block);
1203 kfree(tmpde);
1204 return -EIO;
1205
1206out_toomany:
1207 printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n"
1208 "isofs_read_level3_size: inode=%lu\n",
1209 __func__, inode->i_ino);
1210 goto out;
1211}
1212
1213static int isofs_read_inode(struct inode *inode)
1214{
1215 struct super_block *sb = inode->i_sb;
1216 struct isofs_sb_info *sbi = ISOFS_SB(sb);
1217 unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
1218 unsigned long block;
1219 int high_sierra = sbi->s_high_sierra;
1220 struct buffer_head *bh = NULL;
1221 struct iso_directory_record *de;
1222 struct iso_directory_record *tmpde = NULL;
1223 unsigned int de_len;
1224 unsigned long offset;
1225 struct iso_inode_info *ei = ISOFS_I(inode);
1226 int ret = -EIO;
1227
1228 block = ei->i_iget5_block;
1229 bh = sb_bread(inode->i_sb, block);
1230 if (!bh)
1231 goto out_badread;
1232
1233 offset = ei->i_iget5_offset;
1234
1235 de = (struct iso_directory_record *) (bh->b_data + offset);
1236 de_len = *(unsigned char *) de;
1237
1238 if (offset + de_len > bufsize) {
1239 int frag1 = bufsize - offset;
1240
1241 tmpde = kmalloc(de_len, GFP_KERNEL);
1242 if (tmpde == NULL) {
1243 printk(KERN_INFO "%s: out of memory\n", __func__);
1244 ret = -ENOMEM;
1245 goto fail;
1246 }
1247 memcpy(tmpde, bh->b_data + offset, frag1);
1248 brelse(bh);
1249 bh = sb_bread(inode->i_sb, ++block);
1250 if (!bh)
1251 goto out_badread;
1252 memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1);
1253 de = tmpde;
1254 }
1255
1256 inode->i_ino = isofs_get_ino(ei->i_iget5_block,
1257 ei->i_iget5_offset,
1258 ISOFS_BUFFER_BITS(inode));
1259
1260
1261 ei->i_file_format = isofs_file_normal;
1262
1263 if (de->flags[-high_sierra] & 2) {
1264 if (sbi->s_dmode != ISOFS_INVALID_MODE)
1265 inode->i_mode = S_IFDIR | sbi->s_dmode;
1266 else
1267 inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
1268 inode->i_nlink = 1;
1269
1270
1271
1272
1273
1274
1275 } else {
1276 if (sbi->s_fmode != ISOFS_INVALID_MODE) {
1277 inode->i_mode = S_IFREG | sbi->s_fmode;
1278 } else {
1279
1280
1281
1282
1283
1284 inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO;
1285 }
1286 inode->i_nlink = 1;
1287 }
1288 inode->i_uid = sbi->s_uid;
1289 inode->i_gid = sbi->s_gid;
1290 inode->i_blocks = 0;
1291
1292 ei->i_format_parm[0] = 0;
1293 ei->i_format_parm[1] = 0;
1294 ei->i_format_parm[2] = 0;
1295
1296 ei->i_section_size = isonum_733(de->size);
1297 if (de->flags[-high_sierra] & 0x80) {
1298 ret = isofs_read_level3_size(inode);
1299 if (ret < 0)
1300 goto fail;
1301 ret = -EIO;
1302 } else {
1303 ei->i_next_section_block = 0;
1304 ei->i_next_section_offset = 0;
1305 inode->i_size = isonum_733(de->size);
1306 }
1307
1308
1309
1310
1311
1312
1313
1314 if (sbi->s_cruft)
1315 inode->i_size &= 0x00ffffff;
1316
1317 if (de->interleave[0]) {
1318 printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n");
1319 inode->i_size = 0;
1320 }
1321
1322
1323
1324 if (de->file_unit_size[0] != 0) {
1325 printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n",
1326 inode->i_ino);
1327 }
1328
1329
1330
1331#ifdef DEBUG
1332 if((de->flags[-high_sierra] & ~2)!= 0){
1333 printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file "
1334 "(%ld %x).\n",
1335 inode->i_ino, de->flags[-high_sierra]);
1336 }
1337#endif
1338
1339 inode->i_mtime.tv_sec =
1340 inode->i_atime.tv_sec =
1341 inode->i_ctime.tv_sec = iso_date(de->date, high_sierra);
1342 inode->i_mtime.tv_nsec =
1343 inode->i_atime.tv_nsec =
1344 inode->i_ctime.tv_nsec = 0;
1345
1346 ei->i_first_extent = (isonum_733(de->extent) +
1347 isonum_711(de->ext_attr_length));
1348
1349
1350 inode->i_blocks = (inode->i_size + 511) >> 9;
1351
1352
1353
1354
1355
1356
1357 if (!high_sierra) {
1358 parse_rock_ridge_inode(de, inode);
1359
1360 if (sbi->s_uid_set)
1361 inode->i_uid = sbi->s_uid;
1362 if (sbi->s_gid_set)
1363 inode->i_gid = sbi->s_gid;
1364 }
1365
1366 if (S_ISDIR(inode->i_mode) && sbi->s_overriderockperm &&
1367 sbi->s_dmode != ISOFS_INVALID_MODE)
1368 inode->i_mode = S_IFDIR | sbi->s_dmode;
1369 if (S_ISREG(inode->i_mode) && sbi->s_overriderockperm &&
1370 sbi->s_fmode != ISOFS_INVALID_MODE)
1371 inode->i_mode = S_IFREG | sbi->s_fmode;
1372
1373
1374 if (S_ISREG(inode->i_mode)) {
1375 inode->i_fop = &generic_ro_fops;
1376 switch (ei->i_file_format) {
1377#ifdef CONFIG_ZISOFS
1378 case isofs_file_compressed:
1379 inode->i_data.a_ops = &zisofs_aops;
1380 break;
1381#endif
1382 default:
1383 inode->i_data.a_ops = &isofs_aops;
1384 break;
1385 }
1386 } else if (S_ISDIR(inode->i_mode)) {
1387 inode->i_op = &isofs_dir_inode_operations;
1388 inode->i_fop = &isofs_dir_operations;
1389 } else if (S_ISLNK(inode->i_mode)) {
1390 inode->i_op = &page_symlink_inode_operations;
1391 inode->i_data.a_ops = &isofs_symlink_aops;
1392 } else
1393
1394 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1395
1396 ret = 0;
1397out:
1398 kfree(tmpde);
1399 if (bh)
1400 brelse(bh);
1401 return ret;
1402
1403out_badread:
1404 printk(KERN_WARNING "ISOFS: unable to read i-node block\n");
1405fail:
1406 goto out;
1407}
1408
1409struct isofs_iget5_callback_data {
1410 unsigned long block;
1411 unsigned long offset;
1412};
1413
1414static int isofs_iget5_test(struct inode *ino, void *data)
1415{
1416 struct iso_inode_info *i = ISOFS_I(ino);
1417 struct isofs_iget5_callback_data *d =
1418 (struct isofs_iget5_callback_data*)data;
1419 return (i->i_iget5_block == d->block)
1420 && (i->i_iget5_offset == d->offset);
1421}
1422
1423static int isofs_iget5_set(struct inode *ino, void *data)
1424{
1425 struct iso_inode_info *i = ISOFS_I(ino);
1426 struct isofs_iget5_callback_data *d =
1427 (struct isofs_iget5_callback_data*)data;
1428 i->i_iget5_block = d->block;
1429 i->i_iget5_offset = d->offset;
1430 return 0;
1431}
1432
1433
1434
1435
1436
1437struct inode *isofs_iget(struct super_block *sb,
1438 unsigned long block,
1439 unsigned long offset)
1440{
1441 unsigned long hashval;
1442 struct inode *inode;
1443 struct isofs_iget5_callback_data data;
1444 long ret;
1445
1446 if (offset >= 1ul << sb->s_blocksize_bits)
1447 return ERR_PTR(-EINVAL);
1448
1449 data.block = block;
1450 data.offset = offset;
1451
1452 hashval = (block << sb->s_blocksize_bits) | offset;
1453
1454 inode = iget5_locked(sb, hashval, &isofs_iget5_test,
1455 &isofs_iget5_set, &data);
1456
1457 if (!inode)
1458 return ERR_PTR(-ENOMEM);
1459
1460 if (inode->i_state & I_NEW) {
1461 ret = isofs_read_inode(inode);
1462 if (ret < 0) {
1463 iget_failed(inode);
1464 inode = ERR_PTR(ret);
1465 } else {
1466 unlock_new_inode(inode);
1467 }
1468 }
1469
1470 return inode;
1471}
1472
1473static int isofs_get_sb(struct file_system_type *fs_type,
1474 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1475{
1476 return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super,
1477 mnt);
1478}
1479
1480static struct file_system_type iso9660_fs_type = {
1481 .owner = THIS_MODULE,
1482 .name = "iso9660",
1483 .get_sb = isofs_get_sb,
1484 .kill_sb = kill_block_super,
1485 .fs_flags = FS_REQUIRES_DEV,
1486};
1487
1488static int __init init_iso9660_fs(void)
1489{
1490 int err = init_inodecache();
1491 if (err)
1492 goto out;
1493#ifdef CONFIG_ZISOFS
1494 err = zisofs_init();
1495 if (err)
1496 goto out1;
1497#endif
1498 err = register_filesystem(&iso9660_fs_type);
1499 if (err)
1500 goto out2;
1501 return 0;
1502out2:
1503#ifdef CONFIG_ZISOFS
1504 zisofs_cleanup();
1505out1:
1506#endif
1507 destroy_inodecache();
1508out:
1509 return err;
1510}
1511
1512static void __exit exit_iso9660_fs(void)
1513{
1514 unregister_filesystem(&iso9660_fs_type);
1515#ifdef CONFIG_ZISOFS
1516 zisofs_cleanup();
1517#endif
1518 destroy_inodecache();
1519}
1520
1521module_init(init_iso9660_fs)
1522module_exit(exit_iso9660_fs)
1523MODULE_LICENSE("GPL");
1524
1525MODULE_ALIAS("iso9660");
1526