1
2
3
4
5
6
7
8
9
10
11
12
13
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/statfs.h>
21#include <linux/cdrom.h>
22#include <linux/parser.h>
23
24#include "isofs.h"
25#include "zisofs.h"
26
27#define BEQUIET
28
29static int isofs_hashi(const struct dentry *parent, const struct inode *inode,
30 struct qstr *qstr);
31static int isofs_hash(const struct dentry *parent, const struct inode *inode,
32 struct qstr *qstr);
33static int isofs_dentry_cmpi(const struct dentry *parent,
34 const struct inode *pinode,
35 const struct dentry *dentry, const struct inode *inode,
36 unsigned int len, const char *str, const struct qstr *name);
37static int isofs_dentry_cmp(const struct dentry *parent,
38 const struct inode *pinode,
39 const struct dentry *dentry, const struct inode *inode,
40 unsigned int len, const char *str, const struct qstr *name);
41
42#ifdef CONFIG_JOLIET
43static int isofs_hashi_ms(const struct dentry *parent, const struct inode *inode,
44 struct qstr *qstr);
45static int isofs_hash_ms(const struct dentry *parent, const struct inode *inode,
46 struct qstr *qstr);
47static int isofs_dentry_cmpi_ms(const struct dentry *parent,
48 const struct inode *pinode,
49 const struct dentry *dentry, const struct inode *inode,
50 unsigned int len, const char *str, const struct qstr *name);
51static int isofs_dentry_cmp_ms(const struct dentry *parent,
52 const struct inode *pinode,
53 const struct dentry *dentry, const struct inode *inode,
54 unsigned int len, const char *str, const struct qstr *name);
55#endif
56
57static void isofs_put_super(struct super_block *sb)
58{
59 struct isofs_sb_info *sbi = ISOFS_SB(sb);
60
61#ifdef CONFIG_JOLIET
62 unload_nls(sbi->s_nls_iocharset);
63#endif
64
65 kfree(sbi);
66 sb->s_fs_info = NULL;
67 return;
68}
69
70static int isofs_read_inode(struct inode *);
71static int isofs_statfs (struct dentry *, struct kstatfs *);
72
73static struct kmem_cache *isofs_inode_cachep;
74
75static struct inode *isofs_alloc_inode(struct super_block *sb)
76{
77 struct iso_inode_info *ei;
78 ei = kmem_cache_alloc(isofs_inode_cachep, GFP_KERNEL);
79 if (!ei)
80 return NULL;
81 return &ei->vfs_inode;
82}
83
84static void isofs_i_callback(struct rcu_head *head)
85{
86 struct inode *inode = container_of(head, struct inode, i_rcu);
87 INIT_LIST_HEAD(&inode->i_dentry);
88 kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
89}
90
91static void isofs_destroy_inode(struct inode *inode)
92{
93 call_rcu(&inode->i_rcu, isofs_i_callback);
94}
95
96static void init_once(void *foo)
97{
98 struct iso_inode_info *ei = foo;
99
100 inode_init_once(&ei->vfs_inode);
101}
102
103static int init_inodecache(void)
104{
105 isofs_inode_cachep = kmem_cache_create("isofs_inode_cache",
106 sizeof(struct iso_inode_info),
107 0, (SLAB_RECLAIM_ACCOUNT|
108 SLAB_MEM_SPREAD),
109 init_once);
110 if (isofs_inode_cachep == NULL)
111 return -ENOMEM;
112 return 0;
113}
114
115static void destroy_inodecache(void)
116{
117 kmem_cache_destroy(isofs_inode_cachep);
118}
119
120static int isofs_remount(struct super_block *sb, int *flags, char *data)
121{
122
123 *flags |= MS_RDONLY;
124 return 0;
125}
126
127static const struct super_operations isofs_sops = {
128 .alloc_inode = isofs_alloc_inode,
129 .destroy_inode = isofs_destroy_inode,
130 .put_super = isofs_put_super,
131 .statfs = isofs_statfs,
132 .remount_fs = isofs_remount,
133 .show_options = generic_show_options,
134};
135
136
137static const struct dentry_operations isofs_dentry_ops[] = {
138 {
139 .d_hash = isofs_hash,
140 .d_compare = isofs_dentry_cmp,
141 },
142 {
143 .d_hash = isofs_hashi,
144 .d_compare = isofs_dentry_cmpi,
145 },
146#ifdef CONFIG_JOLIET
147 {
148 .d_hash = isofs_hash_ms,
149 .d_compare = isofs_dentry_cmp_ms,
150 },
151 {
152 .d_hash = isofs_hashi_ms,
153 .d_compare = isofs_dentry_cmpi_ms,
154 },
155#endif
156};
157
158struct iso9660_options{
159 unsigned int rock:1;
160 unsigned int joliet:1;
161 unsigned int cruft:1;
162 unsigned int hide:1;
163 unsigned int showassoc:1;
164 unsigned int nocompress:1;
165 unsigned int overriderockperm:1;
166 unsigned int uid_set:1;
167 unsigned int gid_set:1;
168 unsigned int utf8:1;
169 unsigned char map;
170 unsigned char check;
171 unsigned int blocksize;
172 mode_t fmode;
173 mode_t dmode;
174 gid_t gid;
175 uid_t uid;
176 char *iocharset;
177
178 s32 session;
179 s32 sbsector;
180};
181
182
183
184
185static int
186isofs_hash_common(const struct dentry *dentry, struct qstr *qstr, int ms)
187{
188 const char *name;
189 int len;
190
191 len = qstr->len;
192 name = qstr->name;
193 if (ms) {
194 while (len && name[len-1] == '.')
195 len--;
196 }
197
198 qstr->hash = full_name_hash(name, len);
199
200 return 0;
201}
202
203
204
205
206static int
207isofs_hashi_common(const struct dentry *dentry, struct qstr *qstr, int ms)
208{
209 const char *name;
210 int len;
211 char c;
212 unsigned long hash;
213
214 len = qstr->len;
215 name = qstr->name;
216 if (ms) {
217 while (len && name[len-1] == '.')
218 len--;
219 }
220
221 hash = init_name_hash();
222 while (len--) {
223 c = tolower(*name++);
224 hash = partial_name_hash(c, hash);
225 }
226 qstr->hash = end_name_hash(hash);
227
228 return 0;
229}
230
231
232
233
234static int isofs_dentry_cmp_common(
235 unsigned int len, const char *str,
236 const struct qstr *name, int ms, int ci)
237{
238 int alen, blen;
239
240
241 alen = name->len;
242 blen = len;
243 if (ms) {
244 while (alen && name->name[alen-1] == '.')
245 alen--;
246 while (blen && str[blen-1] == '.')
247 blen--;
248 }
249 if (alen == blen) {
250 if (ci) {
251 if (strnicmp(name->name, str, alen) == 0)
252 return 0;
253 } else {
254 if (strncmp(name->name, str, alen) == 0)
255 return 0;
256 }
257 }
258 return 1;
259}
260
261static int
262isofs_hash(const struct dentry *dentry, const struct inode *inode,
263 struct qstr *qstr)
264{
265 return isofs_hash_common(dentry, qstr, 0);
266}
267
268static int
269isofs_hashi(const struct dentry *dentry, const struct inode *inode,
270 struct qstr *qstr)
271{
272 return isofs_hashi_common(dentry, qstr, 0);
273}
274
275static int
276isofs_dentry_cmp(const struct dentry *parent, const struct inode *pinode,
277 const struct dentry *dentry, const struct inode *inode,
278 unsigned int len, const char *str, const struct qstr *name)
279{
280 return isofs_dentry_cmp_common(len, str, name, 0, 0);
281}
282
283static int
284isofs_dentry_cmpi(const struct dentry *parent, const struct inode *pinode,
285 const struct dentry *dentry, const struct inode *inode,
286 unsigned int len, const char *str, const struct qstr *name)
287{
288 return isofs_dentry_cmp_common(len, str, name, 0, 1);
289}
290
291#ifdef CONFIG_JOLIET
292static int
293isofs_hash_ms(const struct dentry *dentry, const struct inode *inode,
294 struct qstr *qstr)
295{
296 return isofs_hash_common(dentry, qstr, 1);
297}
298
299static int
300isofs_hashi_ms(const struct dentry *dentry, const struct inode *inode,
301 struct qstr *qstr)
302{
303 return isofs_hashi_common(dentry, qstr, 1);
304}
305
306static int
307isofs_dentry_cmp_ms(const struct dentry *parent, const struct inode *pinode,
308 const struct dentry *dentry, const struct inode *inode,
309 unsigned int len, const char *str, const struct qstr *name)
310{
311 return isofs_dentry_cmp_common(len, str, name, 1, 0);
312}
313
314static int
315isofs_dentry_cmpi_ms(const struct dentry *parent, const struct inode *pinode,
316 const struct dentry *dentry, const struct inode *inode,
317 unsigned int len, const char *str, const struct qstr *name)
318{
319 return isofs_dentry_cmp_common(len, str, name, 1, 1);
320}
321#endif
322
323enum {
324 Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore,
325 Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet,
326 Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err,
327 Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode, Opt_overriderockperm,
328};
329
330static const match_table_t tokens = {
331 {Opt_norock, "norock"},
332 {Opt_nojoliet, "nojoliet"},
333 {Opt_unhide, "unhide"},
334 {Opt_hide, "hide"},
335 {Opt_showassoc, "showassoc"},
336 {Opt_cruft, "cruft"},
337 {Opt_utf8, "utf8"},
338 {Opt_iocharset, "iocharset=%s"},
339 {Opt_map_a, "map=acorn"},
340 {Opt_map_a, "map=a"},
341 {Opt_map_n, "map=normal"},
342 {Opt_map_n, "map=n"},
343 {Opt_map_o, "map=off"},
344 {Opt_map_o, "map=o"},
345 {Opt_session, "session=%u"},
346 {Opt_sb, "sbsector=%u"},
347 {Opt_check_r, "check=relaxed"},
348 {Opt_check_r, "check=r"},
349 {Opt_check_s, "check=strict"},
350 {Opt_check_s, "check=s"},
351 {Opt_uid, "uid=%u"},
352 {Opt_gid, "gid=%u"},
353 {Opt_mode, "mode=%u"},
354 {Opt_dmode, "dmode=%u"},
355 {Opt_overriderockperm, "overriderockperm"},
356 {Opt_block, "block=%u"},
357 {Opt_ignore, "conv=binary"},
358 {Opt_ignore, "conv=b"},
359 {Opt_ignore, "conv=text"},
360 {Opt_ignore, "conv=t"},
361 {Opt_ignore, "conv=mtext"},
362 {Opt_ignore, "conv=m"},
363 {Opt_ignore, "conv=auto"},
364 {Opt_ignore, "conv=a"},
365 {Opt_nocompress, "nocompress"},
366 {Opt_err, NULL}
367};
368
369static int parse_options(char *options, struct iso9660_options *popt)
370{
371 char *p;
372 int option;
373
374 popt->map = 'n';
375 popt->rock = 1;
376 popt->joliet = 1;
377 popt->cruft = 0;
378 popt->hide = 0;
379 popt->showassoc = 0;
380 popt->check = 'u';
381 popt->nocompress = 0;
382 popt->blocksize = 1024;
383 popt->fmode = popt->dmode = ISOFS_INVALID_MODE;
384 popt->uid_set = 0;
385 popt->gid_set = 0;
386 popt->gid = 0;
387 popt->uid = 0;
388 popt->iocharset = NULL;
389 popt->utf8 = 0;
390 popt->overriderockperm = 0;
391 popt->session=-1;
392 popt->sbsector=-1;
393 if (!options)
394 return 1;
395
396 while ((p = strsep(&options, ",")) != NULL) {
397 int token;
398 substring_t args[MAX_OPT_ARGS];
399 unsigned n;
400
401 if (!*p)
402 continue;
403
404 token = match_token(p, tokens, args);
405 switch (token) {
406 case Opt_norock:
407 popt->rock = 0;
408 break;
409 case Opt_nojoliet:
410 popt->joliet = 0;
411 break;
412 case Opt_hide:
413 popt->hide = 1;
414 break;
415 case Opt_unhide:
416 case Opt_showassoc:
417 popt->showassoc = 1;
418 break;
419 case Opt_cruft:
420 popt->cruft = 1;
421 break;
422 case Opt_utf8:
423 popt->utf8 = 1;
424 break;
425#ifdef CONFIG_JOLIET
426 case Opt_iocharset:
427 popt->iocharset = match_strdup(&args[0]);
428 break;
429#endif
430 case Opt_map_a:
431 popt->map = 'a';
432 break;
433 case Opt_map_o:
434 popt->map = 'o';
435 break;
436 case Opt_map_n:
437 popt->map = 'n';
438 break;
439 case Opt_session:
440 if (match_int(&args[0], &option))
441 return 0;
442 n = option;
443 if (n > 99)
444 return 0;
445 popt->session = n + 1;
446 break;
447 case Opt_sb:
448 if (match_int(&args[0], &option))
449 return 0;
450 popt->sbsector = option;
451 break;
452 case Opt_check_r:
453 popt->check = 'r';
454 break;
455 case Opt_check_s:
456 popt->check = 's';
457 break;
458 case Opt_ignore:
459 break;
460 case Opt_uid:
461 if (match_int(&args[0], &option))
462 return 0;
463 popt->uid = option;
464 popt->uid_set = 1;
465 break;
466 case Opt_gid:
467 if (match_int(&args[0], &option))
468 return 0;
469 popt->gid = option;
470 popt->gid_set = 1;
471 break;
472 case Opt_mode:
473 if (match_int(&args[0], &option))
474 return 0;
475 popt->fmode = option;
476 break;
477 case Opt_dmode:
478 if (match_int(&args[0], &option))
479 return 0;
480 popt->dmode = option;
481 break;
482 case Opt_overriderockperm:
483 popt->overriderockperm = 1;
484 break;
485 case Opt_block:
486 if (match_int(&args[0], &option))
487 return 0;
488 n = option;
489 if (n != 512 && n != 1024 && n != 2048)
490 return 0;
491 popt->blocksize = n;
492 break;
493 case Opt_nocompress:
494 popt->nocompress = 1;
495 break;
496 default:
497 return 0;
498 }
499 }
500 return 1;
501}
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519#define WE_OBEY_THE_WRITTEN_STANDARDS 1
520
521static unsigned int isofs_get_last_session(struct super_block *sb, s32 session)
522{
523 struct cdrom_multisession ms_info;
524 unsigned int vol_desc_start;
525 struct block_device *bdev = sb->s_bdev;
526 int i;
527
528 vol_desc_start=0;
529 ms_info.addr_format=CDROM_LBA;
530 if(session >= 0 && session <= 99) {
531 struct cdrom_tocentry Te;
532 Te.cdte_track=session;
533 Te.cdte_format=CDROM_LBA;
534 i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te);
535 if (!i) {
536 printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n",
537 session, Te.cdte_addr.lba,
538 Te.cdte_ctrl&CDROM_DATA_TRACK);
539 if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4)
540 return Te.cdte_addr.lba;
541 }
542
543 printk(KERN_ERR "ISOFS: Invalid session number or type of track\n");
544 }
545 i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info);
546 if (session > 0)
547 printk(KERN_ERR "ISOFS: Invalid session number\n");
548#if 0
549 printk(KERN_DEBUG "isofs.inode: CDROMMULTISESSION: rc=%d\n",i);
550 if (i==0) {
551 printk(KERN_DEBUG "isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no");
552 printk(KERN_DEBUG "isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba);
553 }
554#endif
555 if (i==0)
556#if WE_OBEY_THE_WRITTEN_STANDARDS
557 if (ms_info.xa_flag)
558#endif
559 vol_desc_start=ms_info.addr.lba;
560 return vol_desc_start;
561}
562
563
564
565
566
567
568
569
570static bool rootdir_empty(struct super_block *sb, unsigned long block)
571{
572 int offset = 0, files = 0, de_len;
573 struct iso_directory_record *de;
574 struct buffer_head *bh;
575
576 bh = sb_bread(sb, block);
577 if (!bh)
578 return true;
579 while (files < 3) {
580 de = (struct iso_directory_record *) (bh->b_data + offset);
581 de_len = *(unsigned char *) de;
582 if (de_len == 0)
583 break;
584 files++;
585 offset += de_len;
586 }
587 brelse(bh);
588 return files < 3;
589}
590
591
592
593
594
595
596
597static int isofs_fill_super(struct super_block *s, void *data, int silent)
598{
599 struct buffer_head *bh = NULL, *pri_bh = NULL;
600 struct hs_primary_descriptor *h_pri = NULL;
601 struct iso_primary_descriptor *pri = NULL;
602 struct iso_supplementary_descriptor *sec = NULL;
603 struct iso_directory_record *rootp;
604 struct inode *inode;
605 struct iso9660_options opt;
606 struct isofs_sb_info *sbi;
607 unsigned long first_data_zone;
608 int joliet_level = 0;
609 int iso_blknum, block;
610 int orig_zonesize;
611 int table, error = -EINVAL;
612 unsigned int vol_desc_start;
613
614 save_mount_options(s, data);
615
616 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
617 if (!sbi)
618 return -ENOMEM;
619 s->s_fs_info = sbi;
620
621 if (!parse_options((char *)data, &opt))
622 goto out_freesbi;
623
624
625
626
627
628
629
630
631
632
633 opt.blocksize = sb_min_blocksize(s, opt.blocksize);
634
635 sbi->s_high_sierra = 0;
636
637 vol_desc_start = (opt.sbsector != -1) ?
638 opt.sbsector : isofs_get_last_session(s,opt.session);
639
640 for (iso_blknum = vol_desc_start+16;
641 iso_blknum < vol_desc_start+100; iso_blknum++) {
642 struct hs_volume_descriptor *hdp;
643 struct iso_volume_descriptor *vdp;
644
645 block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits);
646 if (!(bh = sb_bread(s, block)))
647 goto out_no_read;
648
649 vdp = (struct iso_volume_descriptor *)bh->b_data;
650 hdp = (struct hs_volume_descriptor *)bh->b_data;
651
652
653
654
655
656
657 if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
658 if (isonum_711(vdp->type) == ISO_VD_END)
659 break;
660 if (isonum_711(vdp->type) == ISO_VD_PRIMARY) {
661 if (pri == NULL) {
662 pri = (struct iso_primary_descriptor *)vdp;
663
664 pri_bh = bh;
665 bh = NULL;
666 }
667 }
668#ifdef CONFIG_JOLIET
669 else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) {
670 sec = (struct iso_supplementary_descriptor *)vdp;
671 if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) {
672 if (opt.joliet) {
673 if (sec->escape[2] == 0x40)
674 joliet_level = 1;
675 else if (sec->escape[2] == 0x43)
676 joliet_level = 2;
677 else if (sec->escape[2] == 0x45)
678 joliet_level = 3;
679
680 printk(KERN_DEBUG "ISO 9660 Extensions: "
681 "Microsoft Joliet Level %d\n",
682 joliet_level);
683 }
684 goto root_found;
685 } else {
686
687 sec = NULL;
688 }
689 }
690#endif
691 } else {
692 if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) {
693 if (isonum_711(hdp->type) != ISO_VD_PRIMARY)
694 goto out_freebh;
695
696 sbi->s_high_sierra = 1;
697 opt.rock = 0;
698 h_pri = (struct hs_primary_descriptor *)vdp;
699 goto root_found;
700 }
701 }
702
703
704
705 brelse(bh);
706 bh = NULL;
707 }
708
709
710
711
712 if (!pri)
713 goto out_unknown_format;
714 brelse(bh);
715 bh = pri_bh;
716 pri_bh = NULL;
717
718root_found:
719
720 if (joliet_level && (pri == NULL || !opt.rock)) {
721
722
723
724 pri = (struct iso_primary_descriptor *) sec;
725 }
726
727 if(sbi->s_high_sierra){
728 rootp = (struct iso_directory_record *) h_pri->root_directory_record;
729 sbi->s_nzones = isonum_733(h_pri->volume_space_size);
730 sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size);
731 sbi->s_max_size = isonum_733(h_pri->volume_space_size);
732 } else {
733 if (!pri)
734 goto out_freebh;
735 rootp = (struct iso_directory_record *) pri->root_directory_record;
736 sbi->s_nzones = isonum_733(pri->volume_space_size);
737 sbi->s_log_zone_size = isonum_723(pri->logical_block_size);
738 sbi->s_max_size = isonum_733(pri->volume_space_size);
739 }
740
741 sbi->s_ninodes = 0;
742
743 orig_zonesize = sbi->s_log_zone_size;
744
745
746
747
748
749
750
751 if (orig_zonesize < opt.blocksize)
752 goto out_bad_size;
753
754
755 switch (sbi->s_log_zone_size) {
756 case 512: sbi->s_log_zone_size = 9; break;
757 case 1024: sbi->s_log_zone_size = 10; break;
758 case 2048: sbi->s_log_zone_size = 11; break;
759
760 default:
761 goto out_bad_zone_size;
762 }
763
764 s->s_magic = ISOFS_SUPER_MAGIC;
765
766
767
768
769
770 s->s_maxbytes = 0x80000000000LL;
771
772
773
774
775
776
777
778
779 s->s_flags |= MS_RDONLY ;
780
781
782
783
784 first_data_zone = isonum_733(rootp->extent) +
785 isonum_711(rootp->ext_attr_length);
786 sbi->s_firstdatazone = first_data_zone;
787#ifndef BEQUIET
788 printk(KERN_DEBUG "ISOFS: Max size:%ld Log zone size:%ld\n",
789 sbi->s_max_size, 1UL << sbi->s_log_zone_size);
790 printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone);
791 if(sbi->s_high_sierra)
792 printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n");
793#endif
794
795
796
797
798
799
800
801
802
803 if (joliet_level) {
804 pri = (struct iso_primary_descriptor *) sec;
805 rootp = (struct iso_directory_record *)
806 pri->root_directory_record;
807 first_data_zone = isonum_733(rootp->extent) +
808 isonum_711(rootp->ext_attr_length);
809 }
810
811
812
813
814
815 brelse(pri_bh);
816 brelse(bh);
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835 sb_set_blocksize(s, orig_zonesize);
836
837 sbi->s_nls_iocharset = NULL;
838
839#ifdef CONFIG_JOLIET
840 if (joliet_level && opt.utf8 == 0) {
841 char *p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT;
842 sbi->s_nls_iocharset = load_nls(p);
843 if (! sbi->s_nls_iocharset) {
844
845 if (opt.iocharset)
846 goto out_freesbi;
847 sbi->s_nls_iocharset = load_nls_default();
848 }
849 }
850#endif
851 s->s_op = &isofs_sops;
852 s->s_export_op = &isofs_export_ops;
853 sbi->s_mapping = opt.map;
854 sbi->s_rock = (opt.rock ? 2 : 0);
855 sbi->s_rock_offset = -1;
856 sbi->s_cruft = opt.cruft;
857 sbi->s_hide = opt.hide;
858 sbi->s_showassoc = opt.showassoc;
859 sbi->s_uid = opt.uid;
860 sbi->s_gid = opt.gid;
861 sbi->s_uid_set = opt.uid_set;
862 sbi->s_gid_set = opt.gid_set;
863 sbi->s_utf8 = opt.utf8;
864 sbi->s_nocompress = opt.nocompress;
865 sbi->s_overriderockperm = opt.overriderockperm;
866 mutex_init(&sbi->s_mutex);
867
868
869
870
871
872 if (opt.fmode != ISOFS_INVALID_MODE)
873 sbi->s_fmode = opt.fmode & 0777;
874 else
875 sbi->s_fmode = ISOFS_INVALID_MODE;
876 if (opt.dmode != ISOFS_INVALID_MODE)
877 sbi->s_dmode = opt.dmode & 0777;
878 else
879 sbi->s_dmode = ISOFS_INVALID_MODE;
880
881
882
883
884
885
886 inode = isofs_iget(s, sbi->s_firstdatazone, 0);
887 if (IS_ERR(inode))
888 goto out_no_root;
889
890
891
892
893
894 if (sbi->s_rock == 1 && joliet_level &&
895 rootdir_empty(s, sbi->s_firstdatazone)) {
896 printk(KERN_NOTICE
897 "ISOFS: primary root directory is empty. "
898 "Disabling Rock Ridge and switching to Joliet.");
899 sbi->s_rock = 0;
900 }
901
902
903
904
905
906
907
908
909
910 if (sbi->s_rock == 1) {
911 joliet_level = 0;
912 } else if (joliet_level) {
913 sbi->s_rock = 0;
914 if (sbi->s_firstdatazone != first_data_zone) {
915 sbi->s_firstdatazone = first_data_zone;
916 printk(KERN_DEBUG
917 "ISOFS: changing to secondary root\n");
918 iput(inode);
919 inode = isofs_iget(s, sbi->s_firstdatazone, 0);
920 if (IS_ERR(inode))
921 goto out_no_root;
922 }
923 }
924
925 if (opt.check == 'u') {
926
927 if (joliet_level)
928 opt.check = 'r';
929 else
930 opt.check = 's';
931 }
932 sbi->s_joliet_level = joliet_level;
933
934
935 if (!S_ISDIR(inode->i_mode)) {
936 printk(KERN_WARNING
937 "isofs_fill_super: root inode is not a directory. "
938 "Corrupted media?\n");
939 goto out_iput;
940 }
941
942 table = 0;
943 if (joliet_level)
944 table += 2;
945 if (opt.check == 'r')
946 table++;
947
948 s->s_d_op = &isofs_dentry_ops[table];
949
950
951 s->s_root = d_alloc_root(inode);
952 if (!(s->s_root))
953 goto out_no_root;
954
955 kfree(opt.iocharset);
956
957 return 0;
958
959
960
961
962out_iput:
963 iput(inode);
964 goto out_no_inode;
965out_no_root:
966 error = PTR_ERR(inode);
967 if (error != -ENOMEM)
968 printk(KERN_WARNING "%s: get root inode failed\n", __func__);
969out_no_inode:
970#ifdef CONFIG_JOLIET
971 unload_nls(sbi->s_nls_iocharset);
972#endif
973 goto out_freesbi;
974out_no_read:
975 printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n",
976 __func__, s->s_id, iso_blknum, block);
977 goto out_freesbi;
978out_bad_zone_size:
979 printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n",
980 sbi->s_log_zone_size);
981 goto out_freebh;
982out_bad_size:
983 printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n",
984 orig_zonesize, opt.blocksize);
985 goto out_freebh;
986out_unknown_format:
987 if (!silent)
988 printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n");
989
990out_freebh:
991 brelse(bh);
992out_freesbi:
993 kfree(opt.iocharset);
994 kfree(sbi);
995 s->s_fs_info = NULL;
996 return error;
997}
998
999static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf)
1000{
1001 struct super_block *sb = dentry->d_sb;
1002 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1003
1004 buf->f_type = ISOFS_SUPER_MAGIC;
1005 buf->f_bsize = sb->s_blocksize;
1006 buf->f_blocks = (ISOFS_SB(sb)->s_nzones
1007 << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits));
1008 buf->f_bfree = 0;
1009 buf->f_bavail = 0;
1010 buf->f_files = ISOFS_SB(sb)->s_ninodes;
1011 buf->f_ffree = 0;
1012 buf->f_fsid.val[0] = (u32)id;
1013 buf->f_fsid.val[1] = (u32)(id >> 32);
1014 buf->f_namelen = NAME_MAX;
1015 return 0;
1016}
1017
1018
1019
1020
1021
1022
1023int isofs_get_blocks(struct inode *inode, sector_t iblock,
1024 struct buffer_head **bh, unsigned long nblocks)
1025{
1026 unsigned long b_off = iblock;
1027 unsigned offset, sect_size;
1028 unsigned int firstext;
1029 unsigned long nextblk, nextoff;
1030 int section, rv, error;
1031 struct iso_inode_info *ei = ISOFS_I(inode);
1032
1033 error = -EIO;
1034 rv = 0;
1035 if (iblock != b_off) {
1036 printk(KERN_DEBUG "%s: block number too large\n", __func__);
1037 goto abort;
1038 }
1039
1040
1041 offset = 0;
1042 firstext = ei->i_first_extent;
1043 sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode);
1044 nextblk = ei->i_next_section_block;
1045 nextoff = ei->i_next_section_offset;
1046 section = 0;
1047
1048 while (nblocks) {
1049
1050
1051
1052
1053
1054
1055
1056 if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) {
1057 printk(KERN_DEBUG "%s: block >= EOF (%lu, %llu)\n",
1058 __func__, b_off,
1059 (unsigned long long)inode->i_size);
1060 goto abort;
1061 }
1062
1063
1064
1065
1066
1067 while (nextblk && (b_off >= (offset + sect_size))) {
1068 struct inode *ninode;
1069
1070 offset += sect_size;
1071 ninode = isofs_iget(inode->i_sb, nextblk, nextoff);
1072 if (IS_ERR(ninode)) {
1073 error = PTR_ERR(ninode);
1074 goto abort;
1075 }
1076 firstext = ISOFS_I(ninode)->i_first_extent;
1077 sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode);
1078 nextblk = ISOFS_I(ninode)->i_next_section_block;
1079 nextoff = ISOFS_I(ninode)->i_next_section_offset;
1080 iput(ninode);
1081
1082 if (++section > 100) {
1083 printk(KERN_DEBUG "%s: More than 100 file sections ?!?"
1084 " aborting...\n", __func__);
1085 printk(KERN_DEBUG "%s: block=%lu firstext=%u sect_size=%u "
1086 "nextblk=%lu nextoff=%lu\n", __func__,
1087 b_off, firstext, (unsigned) sect_size,
1088 nextblk, nextoff);
1089 goto abort;
1090 }
1091 }
1092
1093 if (*bh) {
1094 map_bh(*bh, inode->i_sb, firstext + b_off - offset);
1095 } else {
1096 *bh = sb_getblk(inode->i_sb, firstext+b_off-offset);
1097 if (!*bh)
1098 goto abort;
1099 }
1100 bh++;
1101 b_off++;
1102 nblocks--;
1103 rv++;
1104 }
1105
1106 error = 0;
1107abort:
1108 return rv != 0 ? rv : error;
1109}
1110
1111
1112
1113
1114static int isofs_get_block(struct inode *inode, sector_t iblock,
1115 struct buffer_head *bh_result, int create)
1116{
1117 int ret;
1118
1119 if (create) {
1120 printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__);
1121 return -EROFS;
1122 }
1123
1124 ret = isofs_get_blocks(inode, iblock, &bh_result, 1);
1125 return ret < 0 ? ret : 0;
1126}
1127
1128static int isofs_bmap(struct inode *inode, sector_t block)
1129{
1130 struct buffer_head dummy;
1131 int error;
1132
1133 dummy.b_state = 0;
1134 dummy.b_blocknr = -1000;
1135 error = isofs_get_block(inode, block, &dummy, 0);
1136 if (!error)
1137 return dummy.b_blocknr;
1138 return 0;
1139}
1140
1141struct buffer_head *isofs_bread(struct inode *inode, sector_t block)
1142{
1143 sector_t blknr = isofs_bmap(inode, block);
1144 if (!blknr)
1145 return NULL;
1146 return sb_bread(inode->i_sb, blknr);
1147}
1148
1149static int isofs_readpage(struct file *file, struct page *page)
1150{
1151 return block_read_full_page(page,isofs_get_block);
1152}
1153
1154static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
1155{
1156 return generic_block_bmap(mapping,block,isofs_get_block);
1157}
1158
1159static const struct address_space_operations isofs_aops = {
1160 .readpage = isofs_readpage,
1161 .sync_page = block_sync_page,
1162 .bmap = _isofs_bmap
1163};
1164
1165static int isofs_read_level3_size(struct inode *inode)
1166{
1167 unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
1168 int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra;
1169 struct buffer_head *bh = NULL;
1170 unsigned long block, offset, block_saved, offset_saved;
1171 int i = 0;
1172 int more_entries = 0;
1173 struct iso_directory_record *tmpde = NULL;
1174 struct iso_inode_info *ei = ISOFS_I(inode);
1175
1176 inode->i_size = 0;
1177
1178
1179
1180
1181 ei->i_next_section_block = 0;
1182 ei->i_next_section_offset = 0;
1183
1184 block = ei->i_iget5_block;
1185 offset = ei->i_iget5_offset;
1186
1187 do {
1188 struct iso_directory_record *de;
1189 unsigned int de_len;
1190
1191 if (!bh) {
1192 bh = sb_bread(inode->i_sb, block);
1193 if (!bh)
1194 goto out_noread;
1195 }
1196 de = (struct iso_directory_record *) (bh->b_data + offset);
1197 de_len = *(unsigned char *) de;
1198
1199 if (de_len == 0) {
1200 brelse(bh);
1201 bh = NULL;
1202 ++block;
1203 offset = 0;
1204 continue;
1205 }
1206
1207 block_saved = block;
1208 offset_saved = offset;
1209 offset += de_len;
1210
1211
1212 if (offset >= bufsize) {
1213 int slop = bufsize - offset + de_len;
1214 if (!tmpde) {
1215 tmpde = kmalloc(256, GFP_KERNEL);
1216 if (!tmpde)
1217 goto out_nomem;
1218 }
1219 memcpy(tmpde, de, slop);
1220 offset &= bufsize - 1;
1221 block++;
1222 brelse(bh);
1223 bh = NULL;
1224 if (offset) {
1225 bh = sb_bread(inode->i_sb, block);
1226 if (!bh)
1227 goto out_noread;
1228 memcpy((void *)tmpde+slop, bh->b_data, offset);
1229 }
1230 de = tmpde;
1231 }
1232
1233 inode->i_size += isonum_733(de->size);
1234 if (i == 1) {
1235 ei->i_next_section_block = block_saved;
1236 ei->i_next_section_offset = offset_saved;
1237 }
1238
1239 more_entries = de->flags[-high_sierra] & 0x80;
1240
1241 i++;
1242 if (i > 100)
1243 goto out_toomany;
1244 } while (more_entries);
1245out:
1246 kfree(tmpde);
1247 if (bh)
1248 brelse(bh);
1249 return 0;
1250
1251out_nomem:
1252 if (bh)
1253 brelse(bh);
1254 return -ENOMEM;
1255
1256out_noread:
1257 printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block);
1258 kfree(tmpde);
1259 return -EIO;
1260
1261out_toomany:
1262 printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n"
1263 "isofs_read_level3_size: inode=%lu\n",
1264 __func__, inode->i_ino);
1265 goto out;
1266}
1267
1268static int isofs_read_inode(struct inode *inode)
1269{
1270 struct super_block *sb = inode->i_sb;
1271 struct isofs_sb_info *sbi = ISOFS_SB(sb);
1272 unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
1273 unsigned long block;
1274 int high_sierra = sbi->s_high_sierra;
1275 struct buffer_head *bh = NULL;
1276 struct iso_directory_record *de;
1277 struct iso_directory_record *tmpde = NULL;
1278 unsigned int de_len;
1279 unsigned long offset;
1280 struct iso_inode_info *ei = ISOFS_I(inode);
1281 int ret = -EIO;
1282
1283 block = ei->i_iget5_block;
1284 bh = sb_bread(inode->i_sb, block);
1285 if (!bh)
1286 goto out_badread;
1287
1288 offset = ei->i_iget5_offset;
1289
1290 de = (struct iso_directory_record *) (bh->b_data + offset);
1291 de_len = *(unsigned char *) de;
1292
1293 if (offset + de_len > bufsize) {
1294 int frag1 = bufsize - offset;
1295
1296 tmpde = kmalloc(de_len, GFP_KERNEL);
1297 if (tmpde == NULL) {
1298 printk(KERN_INFO "%s: out of memory\n", __func__);
1299 ret = -ENOMEM;
1300 goto fail;
1301 }
1302 memcpy(tmpde, bh->b_data + offset, frag1);
1303 brelse(bh);
1304 bh = sb_bread(inode->i_sb, ++block);
1305 if (!bh)
1306 goto out_badread;
1307 memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1);
1308 de = tmpde;
1309 }
1310
1311 inode->i_ino = isofs_get_ino(ei->i_iget5_block,
1312 ei->i_iget5_offset,
1313 ISOFS_BUFFER_BITS(inode));
1314
1315
1316 ei->i_file_format = isofs_file_normal;
1317
1318 if (de->flags[-high_sierra] & 2) {
1319 if (sbi->s_dmode != ISOFS_INVALID_MODE)
1320 inode->i_mode = S_IFDIR | sbi->s_dmode;
1321 else
1322 inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
1323 inode->i_nlink = 1;
1324
1325
1326
1327
1328
1329
1330 } else {
1331 if (sbi->s_fmode != ISOFS_INVALID_MODE) {
1332 inode->i_mode = S_IFREG | sbi->s_fmode;
1333 } else {
1334
1335
1336
1337
1338
1339 inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO;
1340 }
1341 inode->i_nlink = 1;
1342 }
1343 inode->i_uid = sbi->s_uid;
1344 inode->i_gid = sbi->s_gid;
1345 inode->i_blocks = 0;
1346
1347 ei->i_format_parm[0] = 0;
1348 ei->i_format_parm[1] = 0;
1349 ei->i_format_parm[2] = 0;
1350
1351 ei->i_section_size = isonum_733(de->size);
1352 if (de->flags[-high_sierra] & 0x80) {
1353 ret = isofs_read_level3_size(inode);
1354 if (ret < 0)
1355 goto fail;
1356 ret = -EIO;
1357 } else {
1358 ei->i_next_section_block = 0;
1359 ei->i_next_section_offset = 0;
1360 inode->i_size = isonum_733(de->size);
1361 }
1362
1363
1364
1365
1366
1367
1368
1369 if (sbi->s_cruft)
1370 inode->i_size &= 0x00ffffff;
1371
1372 if (de->interleave[0]) {
1373 printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n");
1374 inode->i_size = 0;
1375 }
1376
1377
1378
1379 if (de->file_unit_size[0] != 0) {
1380 printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n",
1381 inode->i_ino);
1382 }
1383
1384
1385
1386#ifdef DEBUG
1387 if((de->flags[-high_sierra] & ~2)!= 0){
1388 printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file "
1389 "(%ld %x).\n",
1390 inode->i_ino, de->flags[-high_sierra]);
1391 }
1392#endif
1393
1394 inode->i_mtime.tv_sec =
1395 inode->i_atime.tv_sec =
1396 inode->i_ctime.tv_sec = iso_date(de->date, high_sierra);
1397 inode->i_mtime.tv_nsec =
1398 inode->i_atime.tv_nsec =
1399 inode->i_ctime.tv_nsec = 0;
1400
1401 ei->i_first_extent = (isonum_733(de->extent) +
1402 isonum_711(de->ext_attr_length));
1403
1404
1405 inode->i_blocks = (inode->i_size + 511) >> 9;
1406
1407
1408
1409
1410
1411
1412 if (!high_sierra) {
1413 parse_rock_ridge_inode(de, inode);
1414
1415 if (sbi->s_uid_set)
1416 inode->i_uid = sbi->s_uid;
1417 if (sbi->s_gid_set)
1418 inode->i_gid = sbi->s_gid;
1419 }
1420
1421 if (S_ISDIR(inode->i_mode) && sbi->s_overriderockperm &&
1422 sbi->s_dmode != ISOFS_INVALID_MODE)
1423 inode->i_mode = S_IFDIR | sbi->s_dmode;
1424 if (S_ISREG(inode->i_mode) && sbi->s_overriderockperm &&
1425 sbi->s_fmode != ISOFS_INVALID_MODE)
1426 inode->i_mode = S_IFREG | sbi->s_fmode;
1427
1428
1429 if (S_ISREG(inode->i_mode)) {
1430 inode->i_fop = &generic_ro_fops;
1431 switch (ei->i_file_format) {
1432#ifdef CONFIG_ZISOFS
1433 case isofs_file_compressed:
1434 inode->i_data.a_ops = &zisofs_aops;
1435 break;
1436#endif
1437 default:
1438 inode->i_data.a_ops = &isofs_aops;
1439 break;
1440 }
1441 } else if (S_ISDIR(inode->i_mode)) {
1442 inode->i_op = &isofs_dir_inode_operations;
1443 inode->i_fop = &isofs_dir_operations;
1444 } else if (S_ISLNK(inode->i_mode)) {
1445 inode->i_op = &page_symlink_inode_operations;
1446 inode->i_data.a_ops = &isofs_symlink_aops;
1447 } else
1448
1449 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1450
1451 ret = 0;
1452out:
1453 kfree(tmpde);
1454 if (bh)
1455 brelse(bh);
1456 return ret;
1457
1458out_badread:
1459 printk(KERN_WARNING "ISOFS: unable to read i-node block\n");
1460fail:
1461 goto out;
1462}
1463
1464struct isofs_iget5_callback_data {
1465 unsigned long block;
1466 unsigned long offset;
1467};
1468
1469static int isofs_iget5_test(struct inode *ino, void *data)
1470{
1471 struct iso_inode_info *i = ISOFS_I(ino);
1472 struct isofs_iget5_callback_data *d =
1473 (struct isofs_iget5_callback_data*)data;
1474 return (i->i_iget5_block == d->block)
1475 && (i->i_iget5_offset == d->offset);
1476}
1477
1478static int isofs_iget5_set(struct inode *ino, void *data)
1479{
1480 struct iso_inode_info *i = ISOFS_I(ino);
1481 struct isofs_iget5_callback_data *d =
1482 (struct isofs_iget5_callback_data*)data;
1483 i->i_iget5_block = d->block;
1484 i->i_iget5_offset = d->offset;
1485 return 0;
1486}
1487
1488
1489
1490
1491
1492struct inode *isofs_iget(struct super_block *sb,
1493 unsigned long block,
1494 unsigned long offset)
1495{
1496 unsigned long hashval;
1497 struct inode *inode;
1498 struct isofs_iget5_callback_data data;
1499 long ret;
1500
1501 if (offset >= 1ul << sb->s_blocksize_bits)
1502 return ERR_PTR(-EINVAL);
1503
1504 data.block = block;
1505 data.offset = offset;
1506
1507 hashval = (block << sb->s_blocksize_bits) | offset;
1508
1509 inode = iget5_locked(sb, hashval, &isofs_iget5_test,
1510 &isofs_iget5_set, &data);
1511
1512 if (!inode)
1513 return ERR_PTR(-ENOMEM);
1514
1515 if (inode->i_state & I_NEW) {
1516 ret = isofs_read_inode(inode);
1517 if (ret < 0) {
1518 iget_failed(inode);
1519 inode = ERR_PTR(ret);
1520 } else {
1521 unlock_new_inode(inode);
1522 }
1523 }
1524
1525 return inode;
1526}
1527
1528static struct dentry *isofs_mount(struct file_system_type *fs_type,
1529 int flags, const char *dev_name, void *data)
1530{
1531 return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super);
1532}
1533
1534static struct file_system_type iso9660_fs_type = {
1535 .owner = THIS_MODULE,
1536 .name = "iso9660",
1537 .mount = isofs_mount,
1538 .kill_sb = kill_block_super,
1539 .fs_flags = FS_REQUIRES_DEV,
1540};
1541
1542static int __init init_iso9660_fs(void)
1543{
1544 int err = init_inodecache();
1545 if (err)
1546 goto out;
1547#ifdef CONFIG_ZISOFS
1548 err = zisofs_init();
1549 if (err)
1550 goto out1;
1551#endif
1552 err = register_filesystem(&iso9660_fs_type);
1553 if (err)
1554 goto out2;
1555 return 0;
1556out2:
1557#ifdef CONFIG_ZISOFS
1558 zisofs_cleanup();
1559out1:
1560#endif
1561 destroy_inodecache();
1562out:
1563 return err;
1564}
1565
1566static void __exit exit_iso9660_fs(void)
1567{
1568 unregister_filesystem(&iso9660_fs_type);
1569#ifdef CONFIG_ZISOFS
1570 zisofs_cleanup();
1571#endif
1572 destroy_inodecache();
1573}
1574
1575module_init(init_iso9660_fs)
1576module_exit(exit_iso9660_fs)
1577MODULE_LICENSE("GPL");
1578
1579MODULE_ALIAS("iso9660");
1580