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Merge git://git.skbuff.net/gitroot/yoshfuji/linux-2.6.14+advapi-fix/
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / isofs / inode.c
1 /*
2 * linux/fs/isofs/inode.c
3 *
4 * (C) 1991 Linus Torvalds - minix filesystem
5 * 1992, 1993, 1994 Eric Youngdale Modified for ISO 9660 filesystem.
6 * 1994 Eberhard Moenkeberg - multi session handling.
7 * 1995 Mark Dobie - allow mounting of some weird VideoCDs and PhotoCDs.
8 * 1997 Gordon Chaffee - Joliet CDs
9 * 1998 Eric Lammerts - ISO 9660 Level 3
10 * 2004 Paul Serice - Inode Support pushed out from 4GB to 128GB
11 * 2004 Paul Serice - NFS Export Operations
12 */
13
14 #include <linux/config.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
17
18 #include <linux/slab.h>
19 #include <linux/nls.h>
20 #include <linux/ctype.h>
21 #include <linux/smp_lock.h>
22 #include <linux/statfs.h>
23 #include <linux/cdrom.h>
24 #include <linux/parser.h>
25
26 #include "isofs.h"
27 #include "zisofs.h"
28
29 #define BEQUIET
30
31 static int isofs_hashi(struct dentry *parent, struct qstr *qstr);
32 static int isofs_hash(struct dentry *parent, struct qstr *qstr);
33 static int isofs_dentry_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b);
34 static int isofs_dentry_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b);
35
36 #ifdef CONFIG_JOLIET
37 static int isofs_hashi_ms(struct dentry *parent, struct qstr *qstr);
38 static int isofs_hash_ms(struct dentry *parent, struct qstr *qstr);
39 static int isofs_dentry_cmpi_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
40 static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
41 #endif
42
43 static void isofs_put_super(struct super_block *sb)
44 {
45 struct isofs_sb_info *sbi = ISOFS_SB(sb);
46 #ifdef CONFIG_JOLIET
47 if (sbi->s_nls_iocharset) {
48 unload_nls(sbi->s_nls_iocharset);
49 sbi->s_nls_iocharset = NULL;
50 }
51 #endif
52
53 kfree(sbi);
54 sb->s_fs_info = NULL;
55 return;
56 }
57
58 static void isofs_read_inode(struct inode *);
59 static int isofs_statfs (struct super_block *, struct kstatfs *);
60
61 static kmem_cache_t *isofs_inode_cachep;
62
63 static struct inode *isofs_alloc_inode(struct super_block *sb)
64 {
65 struct iso_inode_info *ei;
66 ei = kmem_cache_alloc(isofs_inode_cachep, SLAB_KERNEL);
67 if (!ei)
68 return NULL;
69 return &ei->vfs_inode;
70 }
71
72 static void isofs_destroy_inode(struct inode *inode)
73 {
74 kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
75 }
76
77 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
78 {
79 struct iso_inode_info *ei = foo;
80
81 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
82 SLAB_CTOR_CONSTRUCTOR)
83 inode_init_once(&ei->vfs_inode);
84 }
85
86 static int init_inodecache(void)
87 {
88 isofs_inode_cachep = kmem_cache_create("isofs_inode_cache",
89 sizeof(struct iso_inode_info),
90 0, SLAB_RECLAIM_ACCOUNT,
91 init_once, NULL);
92 if (isofs_inode_cachep == NULL)
93 return -ENOMEM;
94 return 0;
95 }
96
97 static void destroy_inodecache(void)
98 {
99 if (kmem_cache_destroy(isofs_inode_cachep))
100 printk(KERN_INFO "iso_inode_cache: not all structures were "
101 "freed\n");
102 }
103
104 static int isofs_remount(struct super_block *sb, int *flags, char *data)
105 {
106 /* we probably want a lot more here */
107 *flags |= MS_RDONLY;
108 return 0;
109 }
110
111 static struct super_operations isofs_sops = {
112 .alloc_inode = isofs_alloc_inode,
113 .destroy_inode = isofs_destroy_inode,
114 .read_inode = isofs_read_inode,
115 .put_super = isofs_put_super,
116 .statfs = isofs_statfs,
117 .remount_fs = isofs_remount,
118 };
119
120
121 static struct dentry_operations isofs_dentry_ops[] = {
122 {
123 .d_hash = isofs_hash,
124 .d_compare = isofs_dentry_cmp,
125 },
126 {
127 .d_hash = isofs_hashi,
128 .d_compare = isofs_dentry_cmpi,
129 },
130 #ifdef CONFIG_JOLIET
131 {
132 .d_hash = isofs_hash_ms,
133 .d_compare = isofs_dentry_cmp_ms,
134 },
135 {
136 .d_hash = isofs_hashi_ms,
137 .d_compare = isofs_dentry_cmpi_ms,
138 },
139 #endif
140 };
141
142 struct iso9660_options{
143 char map;
144 char rock;
145 char joliet;
146 char cruft;
147 char hide;
148 char showassoc;
149 char nocompress;
150 unsigned char check;
151 unsigned int blocksize;
152 mode_t mode;
153 gid_t gid;
154 uid_t uid;
155 char *iocharset;
156 unsigned char utf8;
157 /* LVE */
158 s32 session;
159 s32 sbsector;
160 };
161
162 /*
163 * Compute the hash for the isofs name corresponding to the dentry.
164 */
165 static int
166 isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms)
167 {
168 const char *name;
169 int len;
170
171 len = qstr->len;
172 name = qstr->name;
173 if (ms) {
174 while (len && name[len-1] == '.')
175 len--;
176 }
177
178 qstr->hash = full_name_hash(name, len);
179
180 return 0;
181 }
182
183 /*
184 * Compute the hash for the isofs name corresponding to the dentry.
185 */
186 static int
187 isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms)
188 {
189 const char *name;
190 int len;
191 char c;
192 unsigned long hash;
193
194 len = qstr->len;
195 name = qstr->name;
196 if (ms) {
197 while (len && name[len-1] == '.')
198 len--;
199 }
200
201 hash = init_name_hash();
202 while (len--) {
203 c = tolower(*name++);
204 hash = partial_name_hash(tolower(c), hash);
205 }
206 qstr->hash = end_name_hash(hash);
207
208 return 0;
209 }
210
211 /*
212 * Case insensitive compare of two isofs names.
213 */
214 static int isofs_dentry_cmpi_common(struct dentry *dentry, struct qstr *a,
215 struct qstr *b, int ms)
216 {
217 int alen, blen;
218
219 /* A filename cannot end in '.' or we treat it like it has none */
220 alen = a->len;
221 blen = b->len;
222 if (ms) {
223 while (alen && a->name[alen-1] == '.')
224 alen--;
225 while (blen && b->name[blen-1] == '.')
226 blen--;
227 }
228 if (alen == blen) {
229 if (strnicmp(a->name, b->name, alen) == 0)
230 return 0;
231 }
232 return 1;
233 }
234
235 /*
236 * Case sensitive compare of two isofs names.
237 */
238 static int isofs_dentry_cmp_common(struct dentry *dentry, struct qstr *a,
239 struct qstr *b, int ms)
240 {
241 int alen, blen;
242
243 /* A filename cannot end in '.' or we treat it like it has none */
244 alen = a->len;
245 blen = b->len;
246 if (ms) {
247 while (alen && a->name[alen-1] == '.')
248 alen--;
249 while (blen && b->name[blen-1] == '.')
250 blen--;
251 }
252 if (alen == blen) {
253 if (strncmp(a->name, b->name, alen) == 0)
254 return 0;
255 }
256 return 1;
257 }
258
259 static int
260 isofs_hash(struct dentry *dentry, struct qstr *qstr)
261 {
262 return isofs_hash_common(dentry, qstr, 0);
263 }
264
265 static int
266 isofs_hashi(struct dentry *dentry, struct qstr *qstr)
267 {
268 return isofs_hashi_common(dentry, qstr, 0);
269 }
270
271 static int
272 isofs_dentry_cmp(struct dentry *dentry,struct qstr *a,struct qstr *b)
273 {
274 return isofs_dentry_cmp_common(dentry, a, b, 0);
275 }
276
277 static int
278 isofs_dentry_cmpi(struct dentry *dentry,struct qstr *a,struct qstr *b)
279 {
280 return isofs_dentry_cmpi_common(dentry, a, b, 0);
281 }
282
283 #ifdef CONFIG_JOLIET
284 static int
285 isofs_hash_ms(struct dentry *dentry, struct qstr *qstr)
286 {
287 return isofs_hash_common(dentry, qstr, 1);
288 }
289
290 static int
291 isofs_hashi_ms(struct dentry *dentry, struct qstr *qstr)
292 {
293 return isofs_hashi_common(dentry, qstr, 1);
294 }
295
296 static int
297 isofs_dentry_cmp_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
298 {
299 return isofs_dentry_cmp_common(dentry, a, b, 1);
300 }
301
302 static int
303 isofs_dentry_cmpi_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
304 {
305 return isofs_dentry_cmpi_common(dentry, a, b, 1);
306 }
307 #endif
308
309 enum {
310 Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore,
311 Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet,
312 Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err,
313 Opt_nocompress, Opt_hide, Opt_showassoc,
314 };
315
316 static match_table_t tokens = {
317 {Opt_norock, "norock"},
318 {Opt_nojoliet, "nojoliet"},
319 {Opt_unhide, "unhide"},
320 {Opt_hide, "hide"},
321 {Opt_showassoc, "showassoc"},
322 {Opt_cruft, "cruft"},
323 {Opt_utf8, "utf8"},
324 {Opt_iocharset, "iocharset=%s"},
325 {Opt_map_a, "map=acorn"},
326 {Opt_map_a, "map=a"},
327 {Opt_map_n, "map=normal"},
328 {Opt_map_n, "map=n"},
329 {Opt_map_o, "map=off"},
330 {Opt_map_o, "map=o"},
331 {Opt_session, "session=%u"},
332 {Opt_sb, "sbsector=%u"},
333 {Opt_check_r, "check=relaxed"},
334 {Opt_check_r, "check=r"},
335 {Opt_check_s, "check=strict"},
336 {Opt_check_s, "check=s"},
337 {Opt_uid, "uid=%u"},
338 {Opt_gid, "gid=%u"},
339 {Opt_mode, "mode=%u"},
340 {Opt_block, "block=%u"},
341 {Opt_ignore, "conv=binary"},
342 {Opt_ignore, "conv=b"},
343 {Opt_ignore, "conv=text"},
344 {Opt_ignore, "conv=t"},
345 {Opt_ignore, "conv=mtext"},
346 {Opt_ignore, "conv=m"},
347 {Opt_ignore, "conv=auto"},
348 {Opt_ignore, "conv=a"},
349 {Opt_nocompress, "nocompress"},
350 {Opt_err, NULL}
351 };
352
353 static int parse_options(char *options, struct iso9660_options *popt)
354 {
355 char *p;
356 int option;
357
358 popt->map = 'n';
359 popt->rock = 'y';
360 popt->joliet = 'y';
361 popt->cruft = 'n';
362 popt->hide = 'n';
363 popt->showassoc = 'n';
364 popt->check = 'u'; /* unset */
365 popt->nocompress = 0;
366 popt->blocksize = 1024;
367 popt->mode = S_IRUGO | S_IXUGO; /* r-x for all. The disc could
368 be shared with DOS machines so
369 virtually anything could be
370 a valid executable. */
371 popt->gid = 0;
372 popt->uid = 0;
373 popt->iocharset = NULL;
374 popt->utf8 = 0;
375 popt->session=-1;
376 popt->sbsector=-1;
377 if (!options)
378 return 1;
379
380 while ((p = strsep(&options, ",")) != NULL) {
381 int token;
382 substring_t args[MAX_OPT_ARGS];
383 unsigned n;
384
385 if (!*p)
386 continue;
387
388 token = match_token(p, tokens, args);
389 switch (token) {
390 case Opt_norock:
391 popt->rock = 'n';
392 break;
393 case Opt_nojoliet:
394 popt->joliet = 'n';
395 break;
396 case Opt_hide:
397 popt->hide = 'y';
398 break;
399 case Opt_unhide:
400 case Opt_showassoc:
401 popt->showassoc = 'y';
402 break;
403 case Opt_cruft:
404 popt->cruft = 'y';
405 break;
406 case Opt_utf8:
407 popt->utf8 = 1;
408 break;
409 #ifdef CONFIG_JOLIET
410 case Opt_iocharset:
411 popt->iocharset = match_strdup(&args[0]);
412 break;
413 #endif
414 case Opt_map_a:
415 popt->map = 'a';
416 break;
417 case Opt_map_o:
418 popt->map = 'o';
419 break;
420 case Opt_map_n:
421 popt->map = 'n';
422 break;
423 case Opt_session:
424 if (match_int(&args[0], &option))
425 return 0;
426 n = option;
427 if (n > 99)
428 return 0;
429 popt->session = n + 1;
430 break;
431 case Opt_sb:
432 if (match_int(&args[0], &option))
433 return 0;
434 popt->sbsector = option;
435 break;
436 case Opt_check_r:
437 popt->check = 'r';
438 break;
439 case Opt_check_s:
440 popt->check = 's';
441 break;
442 case Opt_ignore:
443 break;
444 case Opt_uid:
445 if (match_int(&args[0], &option))
446 return 0;
447 popt->uid = option;
448 break;
449 case Opt_gid:
450 if (match_int(&args[0], &option))
451 return 0;
452 popt->gid = option;
453 break;
454 case Opt_mode:
455 if (match_int(&args[0], &option))
456 return 0;
457 popt->mode = option;
458 break;
459 case Opt_block:
460 if (match_int(&args[0], &option))
461 return 0;
462 n = option;
463 if (n != 512 && n != 1024 && n != 2048)
464 return 0;
465 popt->blocksize = n;
466 break;
467 case Opt_nocompress:
468 popt->nocompress = 1;
469 break;
470 default:
471 return 0;
472 }
473 }
474 return 1;
475 }
476
477 /*
478 * look if the driver can tell the multi session redirection value
479 *
480 * don't change this if you don't know what you do, please!
481 * Multisession is legal only with XA disks.
482 * A non-XA disk with more than one volume descriptor may do it right, but
483 * usually is written in a nowhere standardized "multi-partition" manner.
484 * Multisession uses absolute addressing (solely the first frame of the whole
485 * track is #0), multi-partition uses relative addressing (each first frame of
486 * each track is #0), and a track is not a session.
487 *
488 * A broken CDwriter software or drive firmware does not set new standards,
489 * at least not if conflicting with the existing ones.
490 *
491 * emoenke@gwdg.de
492 */
493 #define WE_OBEY_THE_WRITTEN_STANDARDS 1
494
495 static unsigned int isofs_get_last_session(struct super_block *sb, s32 session)
496 {
497 struct cdrom_multisession ms_info;
498 unsigned int vol_desc_start;
499 struct block_device *bdev = sb->s_bdev;
500 int i;
501
502 vol_desc_start=0;
503 ms_info.addr_format=CDROM_LBA;
504 if(session >= 0 && session <= 99) {
505 struct cdrom_tocentry Te;
506 Te.cdte_track=session;
507 Te.cdte_format=CDROM_LBA;
508 i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te);
509 if (!i) {
510 printk(KERN_DEBUG "Session %d start %d type %d\n",
511 session, Te.cdte_addr.lba,
512 Te.cdte_ctrl&CDROM_DATA_TRACK);
513 if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4)
514 return Te.cdte_addr.lba;
515 }
516
517 printk(KERN_ERR "Invalid session number or type of track\n");
518 }
519 i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info);
520 if (session > 0)
521 printk(KERN_ERR "Invalid session number\n");
522 #if 0
523 printk("isofs.inode: CDROMMULTISESSION: rc=%d\n",i);
524 if (i==0) {
525 printk("isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no");
526 printk("isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba);
527 }
528 #endif
529 if (i==0)
530 #if WE_OBEY_THE_WRITTEN_STANDARDS
531 if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
532 #endif
533 vol_desc_start=ms_info.addr.lba;
534 return vol_desc_start;
535 }
536
537 /*
538 * Initialize the superblock and read the root inode.
539 *
540 * Note: a check_disk_change() has been done immediately prior
541 * to this call, so we don't need to check again.
542 */
543 static int isofs_fill_super(struct super_block *s, void *data, int silent)
544 {
545 struct buffer_head * bh = NULL, *pri_bh = NULL;
546 struct hs_primary_descriptor * h_pri = NULL;
547 struct iso_primary_descriptor * pri = NULL;
548 struct iso_supplementary_descriptor *sec = NULL;
549 struct iso_directory_record * rootp;
550 int joliet_level = 0;
551 int iso_blknum, block;
552 int orig_zonesize;
553 int table;
554 unsigned int vol_desc_start;
555 unsigned long first_data_zone;
556 struct inode * inode;
557 struct iso9660_options opt;
558 struct isofs_sb_info * sbi;
559
560 sbi = kmalloc(sizeof(*sbi), GFP_KERNEL);
561 if (!sbi)
562 return -ENOMEM;
563 s->s_fs_info = sbi;
564 memset(sbi, 0, sizeof(*sbi));
565
566 if (!parse_options((char *)data, &opt))
567 goto out_freesbi;
568
569 /*
570 * First of all, get the hardware blocksize for this device.
571 * If we don't know what it is, or the hardware blocksize is
572 * larger than the blocksize the user specified, then use
573 * that value.
574 */
575 /*
576 * What if bugger tells us to go beyond page size?
577 */
578 opt.blocksize = sb_min_blocksize(s, opt.blocksize);
579
580 sbi->s_high_sierra = 0; /* default is iso9660 */
581
582 vol_desc_start = (opt.sbsector != -1) ?
583 opt.sbsector : isofs_get_last_session(s,opt.session);
584
585 for (iso_blknum = vol_desc_start+16;
586 iso_blknum < vol_desc_start+100; iso_blknum++)
587 {
588 struct hs_volume_descriptor * hdp;
589 struct iso_volume_descriptor * vdp;
590
591 block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits);
592 if (!(bh = sb_bread(s, block)))
593 goto out_no_read;
594
595 vdp = (struct iso_volume_descriptor *)bh->b_data;
596 hdp = (struct hs_volume_descriptor *)bh->b_data;
597
598 /* Due to the overlapping physical location of the descriptors,
599 * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure
600 * proper identification in this case, we first check for ISO.
601 */
602 if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
603 if (isonum_711 (vdp->type) == ISO_VD_END)
604 break;
605 if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) {
606 if (pri == NULL) {
607 pri = (struct iso_primary_descriptor *)vdp;
608 /* Save the buffer in case we need it ... */
609 pri_bh = bh;
610 bh = NULL;
611 }
612 }
613 #ifdef CONFIG_JOLIET
614 else if (isonum_711 (vdp->type) == ISO_VD_SUPPLEMENTARY) {
615 sec = (struct iso_supplementary_descriptor *)vdp;
616 if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) {
617 if (opt.joliet == 'y') {
618 if (sec->escape[2] == 0x40) {
619 joliet_level = 1;
620 } else if (sec->escape[2] == 0x43) {
621 joliet_level = 2;
622 } else if (sec->escape[2] == 0x45) {
623 joliet_level = 3;
624 }
625 printk(KERN_DEBUG"ISO 9660 Extensions: Microsoft Joliet Level %d\n",
626 joliet_level);
627 }
628 goto root_found;
629 } else {
630 /* Unknown supplementary volume descriptor */
631 sec = NULL;
632 }
633 }
634 #endif
635 } else {
636 if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) {
637 if (isonum_711 (hdp->type) != ISO_VD_PRIMARY)
638 goto out_freebh;
639
640 sbi->s_high_sierra = 1;
641 opt.rock = 'n';
642 h_pri = (struct hs_primary_descriptor *)vdp;
643 goto root_found;
644 }
645 }
646
647 /* Just skip any volume descriptors we don't recognize */
648
649 brelse(bh);
650 bh = NULL;
651 }
652 /*
653 * If we fall through, either no volume descriptor was found,
654 * or else we passed a primary descriptor looking for others.
655 */
656 if (!pri)
657 goto out_unknown_format;
658 brelse(bh);
659 bh = pri_bh;
660 pri_bh = NULL;
661
662 root_found:
663
664 if (joliet_level && (pri == NULL || opt.rock == 'n')) {
665 /* This is the case of Joliet with the norock mount flag.
666 * A disc with both Joliet and Rock Ridge is handled later
667 */
668 pri = (struct iso_primary_descriptor *) sec;
669 }
670
671 if(sbi->s_high_sierra){
672 rootp = (struct iso_directory_record *) h_pri->root_directory_record;
673 sbi->s_nzones = isonum_733 (h_pri->volume_space_size);
674 sbi->s_log_zone_size = isonum_723 (h_pri->logical_block_size);
675 sbi->s_max_size = isonum_733(h_pri->volume_space_size);
676 } else {
677 if (!pri)
678 goto out_freebh;
679 rootp = (struct iso_directory_record *) pri->root_directory_record;
680 sbi->s_nzones = isonum_733 (pri->volume_space_size);
681 sbi->s_log_zone_size = isonum_723 (pri->logical_block_size);
682 sbi->s_max_size = isonum_733(pri->volume_space_size);
683 }
684
685 sbi->s_ninodes = 0; /* No way to figure this out easily */
686
687 orig_zonesize = sbi->s_log_zone_size;
688 /*
689 * If the zone size is smaller than the hardware sector size,
690 * this is a fatal error. This would occur if the disc drive
691 * had sectors that were 2048 bytes, but the filesystem had
692 * blocks that were 512 bytes (which should only very rarely
693 * happen.)
694 */
695 if(orig_zonesize < opt.blocksize)
696 goto out_bad_size;
697
698 /* RDE: convert log zone size to bit shift */
699 switch (sbi->s_log_zone_size)
700 { case 512: sbi->s_log_zone_size = 9; break;
701 case 1024: sbi->s_log_zone_size = 10; break;
702 case 2048: sbi->s_log_zone_size = 11; break;
703
704 default:
705 goto out_bad_zone_size;
706 }
707
708 s->s_magic = ISOFS_SUPER_MAGIC;
709 s->s_maxbytes = 0xffffffff; /* We can handle files up to 4 GB */
710
711 /* The CDROM is read-only, has no nodes (devices) on it, and since
712 all of the files appear to be owned by root, we really do not want
713 to allow suid. (suid or devices will not show up unless we have
714 Rock Ridge extensions) */
715
716 s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */;
717
718 /* Set this for reference. Its not currently used except on write
719 which we don't have .. */
720
721 first_data_zone = isonum_733 (rootp->extent) +
722 isonum_711 (rootp->ext_attr_length);
723 sbi->s_firstdatazone = first_data_zone;
724 #ifndef BEQUIET
725 printk(KERN_DEBUG "Max size:%ld Log zone size:%ld\n",
726 sbi->s_max_size,
727 1UL << sbi->s_log_zone_size);
728 printk(KERN_DEBUG "First datazone:%ld\n", sbi->s_firstdatazone);
729 if(sbi->s_high_sierra)
730 printk(KERN_DEBUG "Disc in High Sierra format.\n");
731 #endif
732
733 /*
734 * If the Joliet level is set, we _may_ decide to use the
735 * secondary descriptor, but can't be sure until after we
736 * read the root inode. But before reading the root inode
737 * we may need to change the device blocksize, and would
738 * rather release the old buffer first. So, we cache the
739 * first_data_zone value from the secondary descriptor.
740 */
741 if (joliet_level) {
742 pri = (struct iso_primary_descriptor *) sec;
743 rootp = (struct iso_directory_record *)
744 pri->root_directory_record;
745 first_data_zone = isonum_733 (rootp->extent) +
746 isonum_711 (rootp->ext_attr_length);
747 }
748
749 /*
750 * We're all done using the volume descriptor, and may need
751 * to change the device blocksize, so release the buffer now.
752 */
753 brelse(pri_bh);
754 brelse(bh);
755
756 /*
757 * Force the blocksize to 512 for 512 byte sectors. The file
758 * read primitives really get it wrong in a bad way if we don't
759 * do this.
760 *
761 * Note - we should never be setting the blocksize to something
762 * less than the hardware sector size for the device. If we
763 * do, we would end up having to read larger buffers and split
764 * out portions to satisfy requests.
765 *
766 * Note2- the idea here is that we want to deal with the optimal
767 * zonesize in the filesystem. If we have it set to something less,
768 * then we have horrible problems with trying to piece together
769 * bits of adjacent blocks in order to properly read directory
770 * entries. By forcing the blocksize in this way, we ensure
771 * that we will never be required to do this.
772 */
773 sb_set_blocksize(s, orig_zonesize);
774
775 sbi->s_nls_iocharset = NULL;
776
777 #ifdef CONFIG_JOLIET
778 if (joliet_level && opt.utf8 == 0) {
779 char * p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT;
780 sbi->s_nls_iocharset = load_nls(p);
781 if (! sbi->s_nls_iocharset) {
782 /* Fail only if explicit charset specified */
783 if (opt.iocharset)
784 goto out_freesbi;
785 sbi->s_nls_iocharset = load_nls_default();
786 }
787 }
788 #endif
789 s->s_op = &isofs_sops;
790 s->s_export_op = &isofs_export_ops;
791 sbi->s_mapping = opt.map;
792 sbi->s_rock = (opt.rock == 'y' ? 2 : 0);
793 sbi->s_rock_offset = -1; /* initial offset, will guess until SP is found*/
794 sbi->s_cruft = opt.cruft;
795 sbi->s_hide = opt.hide;
796 sbi->s_showassoc = opt.showassoc;
797 sbi->s_uid = opt.uid;
798 sbi->s_gid = opt.gid;
799 sbi->s_utf8 = opt.utf8;
800 sbi->s_nocompress = opt.nocompress;
801 /*
802 * It would be incredibly stupid to allow people to mark every file
803 * on the disk as suid, so we merely allow them to set the default
804 * permissions.
805 */
806 sbi->s_mode = opt.mode & 0777;
807
808 /*
809 * Read the root inode, which _may_ result in changing
810 * the s_rock flag. Once we have the final s_rock value,
811 * we then decide whether to use the Joliet descriptor.
812 */
813 inode = isofs_iget(s, sbi->s_firstdatazone, 0);
814
815 /*
816 * If this disk has both Rock Ridge and Joliet on it, then we
817 * want to use Rock Ridge by default. This can be overridden
818 * by using the norock mount option. There is still one other
819 * possibility that is not taken into account: a Rock Ridge
820 * CD with Unicode names. Until someone sees such a beast, it
821 * will not be supported.
822 */
823 if (sbi->s_rock == 1) {
824 joliet_level = 0;
825 } else if (joliet_level) {
826 sbi->s_rock = 0;
827 if (sbi->s_firstdatazone != first_data_zone) {
828 sbi->s_firstdatazone = first_data_zone;
829 printk(KERN_DEBUG
830 "ISOFS: changing to secondary root\n");
831 iput(inode);
832 inode = isofs_iget(s, sbi->s_firstdatazone, 0);
833 }
834 }
835
836 if (opt.check == 'u') {
837 /* Only Joliet is case insensitive by default */
838 if (joliet_level) opt.check = 'r';
839 else opt.check = 's';
840 }
841 sbi->s_joliet_level = joliet_level;
842
843 /* check the root inode */
844 if (!inode)
845 goto out_no_root;
846 if (!inode->i_op)
847 goto out_bad_root;
848 /* get the root dentry */
849 s->s_root = d_alloc_root(inode);
850 if (!(s->s_root))
851 goto out_no_root;
852
853 table = 0;
854 if (joliet_level) table += 2;
855 if (opt.check == 'r') table++;
856 s->s_root->d_op = &isofs_dentry_ops[table];
857
858 kfree(opt.iocharset);
859
860 return 0;
861
862 /*
863 * Display error messages and free resources.
864 */
865 out_bad_root:
866 printk(KERN_WARNING "isofs_fill_super: root inode not initialized\n");
867 goto out_iput;
868 out_no_root:
869 printk(KERN_WARNING "isofs_fill_super: get root inode failed\n");
870 out_iput:
871 iput(inode);
872 #ifdef CONFIG_JOLIET
873 if (sbi->s_nls_iocharset)
874 unload_nls(sbi->s_nls_iocharset);
875 #endif
876 goto out_freesbi;
877 out_no_read:
878 printk(KERN_WARNING "isofs_fill_super: "
879 "bread failed, dev=%s, iso_blknum=%d, block=%d\n",
880 s->s_id, iso_blknum, block);
881 goto out_freesbi;
882 out_bad_zone_size:
883 printk(KERN_WARNING "Bad logical zone size %ld\n",
884 sbi->s_log_zone_size);
885 goto out_freebh;
886 out_bad_size:
887 printk(KERN_WARNING "Logical zone size(%d) < hardware blocksize(%u)\n",
888 orig_zonesize, opt.blocksize);
889 goto out_freebh;
890 out_unknown_format:
891 if (!silent)
892 printk(KERN_WARNING "Unable to identify CD-ROM format.\n");
893
894 out_freebh:
895 brelse(bh);
896 out_freesbi:
897 kfree(opt.iocharset);
898 kfree(sbi);
899 s->s_fs_info = NULL;
900 return -EINVAL;
901 }
902
903 static int isofs_statfs (struct super_block *sb, struct kstatfs *buf)
904 {
905 buf->f_type = ISOFS_SUPER_MAGIC;
906 buf->f_bsize = sb->s_blocksize;
907 buf->f_blocks = (ISOFS_SB(sb)->s_nzones
908 << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits));
909 buf->f_bfree = 0;
910 buf->f_bavail = 0;
911 buf->f_files = ISOFS_SB(sb)->s_ninodes;
912 buf->f_ffree = 0;
913 buf->f_namelen = NAME_MAX;
914 return 0;
915 }
916
917 /*
918 * Get a set of blocks; filling in buffer_heads if already allocated
919 * or getblk() if they are not. Returns the number of blocks inserted
920 * (0 == error.)
921 */
922 int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
923 struct buffer_head **bh, unsigned long nblocks)
924 {
925 unsigned long b_off;
926 unsigned offset, sect_size;
927 unsigned int firstext;
928 unsigned long nextblk, nextoff;
929 long iblock = (long)iblock_s;
930 int section, rv;
931 struct iso_inode_info *ei = ISOFS_I(inode);
932
933 lock_kernel();
934
935 rv = 0;
936 if (iblock < 0 || iblock != iblock_s) {
937 printk("isofs_get_blocks: block number too large\n");
938 goto abort;
939 }
940
941 b_off = iblock;
942
943 offset = 0;
944 firstext = ei->i_first_extent;
945 sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode);
946 nextblk = ei->i_next_section_block;
947 nextoff = ei->i_next_section_offset;
948 section = 0;
949
950 while ( nblocks ) {
951 /* If we are *way* beyond the end of the file, print a message.
952 * Access beyond the end of the file up to the next page boundary
953 * is normal, however because of the way the page cache works.
954 * In this case, we just return 0 so that we can properly fill
955 * the page with useless information without generating any
956 * I/O errors.
957 */
958 if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) {
959 printk("isofs_get_blocks: block >= EOF (%ld, %ld)\n",
960 iblock, (unsigned long) inode->i_size);
961 goto abort;
962 }
963
964 if (nextblk) {
965 while (b_off >= (offset + sect_size)) {
966 struct inode *ninode;
967
968 offset += sect_size;
969 if (nextblk == 0)
970 goto abort;
971 ninode = isofs_iget(inode->i_sb, nextblk, nextoff);
972 if (!ninode)
973 goto abort;
974 firstext = ISOFS_I(ninode)->i_first_extent;
975 sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode);
976 nextblk = ISOFS_I(ninode)->i_next_section_block;
977 nextoff = ISOFS_I(ninode)->i_next_section_offset;
978 iput(ninode);
979
980 if (++section > 100) {
981 printk("isofs_get_blocks: More than 100 file sections ?!?, aborting...\n");
982 printk("isofs_get_blocks: block=%ld firstext=%u sect_size=%u "
983 "nextblk=%lu nextoff=%lu\n",
984 iblock, firstext, (unsigned) sect_size,
985 nextblk, nextoff);
986 goto abort;
987 }
988 }
989 }
990
991 if ( *bh ) {
992 map_bh(*bh, inode->i_sb, firstext + b_off - offset);
993 } else {
994 *bh = sb_getblk(inode->i_sb, firstext+b_off-offset);
995 if ( !*bh )
996 goto abort;
997 }
998 bh++; /* Next buffer head */
999 b_off++; /* Next buffer offset */
1000 nblocks--;
1001 rv++;
1002 }
1003
1004 abort:
1005 unlock_kernel();
1006 return rv;
1007 }
1008
1009 /*
1010 * Used by the standard interfaces.
1011 */
1012 static int isofs_get_block(struct inode *inode, sector_t iblock,
1013 struct buffer_head *bh_result, int create)
1014 {
1015 if (create) {
1016 printk("isofs_get_block: Kernel tries to allocate a block\n");
1017 return -EROFS;
1018 }
1019
1020 return isofs_get_blocks(inode, iblock, &bh_result, 1) ? 0 : -EIO;
1021 }
1022
1023 static int isofs_bmap(struct inode *inode, sector_t block)
1024 {
1025 struct buffer_head dummy;
1026 int error;
1027
1028 dummy.b_state = 0;
1029 dummy.b_blocknr = -1000;
1030 error = isofs_get_block(inode, block, &dummy, 0);
1031 if (!error)
1032 return dummy.b_blocknr;
1033 return 0;
1034 }
1035
1036 struct buffer_head *isofs_bread(struct inode *inode, sector_t block)
1037 {
1038 sector_t blknr = isofs_bmap(inode, block);
1039 if (!blknr)
1040 return NULL;
1041 return sb_bread(inode->i_sb, blknr);
1042 }
1043
1044 static int isofs_readpage(struct file *file, struct page *page)
1045 {
1046 return block_read_full_page(page,isofs_get_block);
1047 }
1048
1049 static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
1050 {
1051 return generic_block_bmap(mapping,block,isofs_get_block);
1052 }
1053
1054 static struct address_space_operations isofs_aops = {
1055 .readpage = isofs_readpage,
1056 .sync_page = block_sync_page,
1057 .bmap = _isofs_bmap
1058 };
1059
1060 static inline void test_and_set_uid(uid_t *p, uid_t value)
1061 {
1062 if (value)
1063 *p = value;
1064 }
1065
1066 static inline void test_and_set_gid(gid_t *p, gid_t value)
1067 {
1068 if (value)
1069 *p = value;
1070 }
1071
1072 static int isofs_read_level3_size(struct inode *inode)
1073 {
1074 unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
1075 int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra;
1076 struct buffer_head * bh = NULL;
1077 unsigned long block, offset, block_saved, offset_saved;
1078 int i = 0;
1079 int more_entries = 0;
1080 struct iso_directory_record * tmpde = NULL;
1081 struct iso_inode_info *ei = ISOFS_I(inode);
1082
1083 inode->i_size = 0;
1084
1085 /* The first 16 blocks are reserved as the System Area. Thus,
1086 * no inodes can appear in block 0. We use this to flag that
1087 * this is the last section. */
1088 ei->i_next_section_block = 0;
1089 ei->i_next_section_offset = 0;
1090
1091 block = ei->i_iget5_block;
1092 offset = ei->i_iget5_offset;
1093
1094 do {
1095 struct iso_directory_record * de;
1096 unsigned int de_len;
1097
1098 if (!bh) {
1099 bh = sb_bread(inode->i_sb, block);
1100 if (!bh)
1101 goto out_noread;
1102 }
1103 de = (struct iso_directory_record *) (bh->b_data + offset);
1104 de_len = *(unsigned char *) de;
1105
1106 if (de_len == 0) {
1107 brelse(bh);
1108 bh = NULL;
1109 ++block;
1110 offset = 0;
1111 continue;
1112 }
1113
1114 block_saved = block;
1115 offset_saved = offset;
1116 offset += de_len;
1117
1118 /* Make sure we have a full directory entry */
1119 if (offset >= bufsize) {
1120 int slop = bufsize - offset + de_len;
1121 if (!tmpde) {
1122 tmpde = kmalloc(256, GFP_KERNEL);
1123 if (!tmpde)
1124 goto out_nomem;
1125 }
1126 memcpy(tmpde, de, slop);
1127 offset &= bufsize - 1;
1128 block++;
1129 brelse(bh);
1130 bh = NULL;
1131 if (offset) {
1132 bh = sb_bread(inode->i_sb, block);
1133 if (!bh)
1134 goto out_noread;
1135 memcpy((void *)tmpde+slop, bh->b_data, offset);
1136 }
1137 de = tmpde;
1138 }
1139
1140 inode->i_size += isonum_733(de->size);
1141 if (i == 1) {
1142 ei->i_next_section_block = block_saved;
1143 ei->i_next_section_offset = offset_saved;
1144 }
1145
1146 more_entries = de->flags[-high_sierra] & 0x80;
1147
1148 i++;
1149 if (i > 100)
1150 goto out_toomany;
1151 } while (more_entries);
1152 out:
1153 kfree(tmpde);
1154 if (bh)
1155 brelse(bh);
1156 return 0;
1157
1158 out_nomem:
1159 if (bh)
1160 brelse(bh);
1161 return -ENOMEM;
1162
1163 out_noread:
1164 printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block);
1165 kfree(tmpde);
1166 return -EIO;
1167
1168 out_toomany:
1169 printk(KERN_INFO "isofs_read_level3_size: "
1170 "More than 100 file sections ?!?, aborting...\n"
1171 "isofs_read_level3_size: inode=%lu\n",
1172 inode->i_ino);
1173 goto out;
1174 }
1175
1176 static void isofs_read_inode(struct inode *inode)
1177 {
1178 struct super_block *sb = inode->i_sb;
1179 struct isofs_sb_info *sbi = ISOFS_SB(sb);
1180 unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
1181 unsigned long block;
1182 int high_sierra = sbi->s_high_sierra;
1183 struct buffer_head * bh = NULL;
1184 struct iso_directory_record * de;
1185 struct iso_directory_record * tmpde = NULL;
1186 unsigned int de_len;
1187 unsigned long offset;
1188 struct iso_inode_info *ei = ISOFS_I(inode);
1189
1190 block = ei->i_iget5_block;
1191 bh = sb_bread(inode->i_sb, block);
1192 if (!bh)
1193 goto out_badread;
1194
1195 offset = ei->i_iget5_offset;
1196
1197 de = (struct iso_directory_record *) (bh->b_data + offset);
1198 de_len = *(unsigned char *) de;
1199
1200 if (offset + de_len > bufsize) {
1201 int frag1 = bufsize - offset;
1202
1203 tmpde = kmalloc(de_len, GFP_KERNEL);
1204 if (tmpde == NULL) {
1205 printk(KERN_INFO "isofs_read_inode: out of memory\n");
1206 goto fail;
1207 }
1208 memcpy(tmpde, bh->b_data + offset, frag1);
1209 brelse(bh);
1210 bh = sb_bread(inode->i_sb, ++block);
1211 if (!bh)
1212 goto out_badread;
1213 memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1);
1214 de = tmpde;
1215 }
1216
1217 inode->i_ino = isofs_get_ino(ei->i_iget5_block,
1218 ei->i_iget5_offset,
1219 ISOFS_BUFFER_BITS(inode));
1220
1221 /* Assume it is a normal-format file unless told otherwise */
1222 ei->i_file_format = isofs_file_normal;
1223
1224 if (de->flags[-high_sierra] & 2) {
1225 inode->i_mode = S_IRUGO | S_IXUGO | S_IFDIR;
1226 inode->i_nlink = 1; /* Set to 1. We know there are 2, but
1227 the find utility tries to optimize
1228 if it is 2, and it screws up. It is
1229 easier to give 1 which tells find to
1230 do it the hard way. */
1231 } else {
1232 /* Everybody gets to read the file. */
1233 inode->i_mode = sbi->s_mode;
1234 inode->i_nlink = 1;
1235 inode->i_mode |= S_IFREG;
1236 }
1237 inode->i_uid = sbi->s_uid;
1238 inode->i_gid = sbi->s_gid;
1239 inode->i_blocks = inode->i_blksize = 0;
1240
1241 ei->i_format_parm[0] = 0;
1242 ei->i_format_parm[1] = 0;
1243 ei->i_format_parm[2] = 0;
1244
1245 ei->i_section_size = isonum_733 (de->size);
1246 if (de->flags[-high_sierra] & 0x80) {
1247 if(isofs_read_level3_size(inode)) goto fail;
1248 } else {
1249 ei->i_next_section_block = 0;
1250 ei->i_next_section_offset = 0;
1251 inode->i_size = isonum_733 (de->size);
1252 }
1253
1254 /*
1255 * Some dipshit decided to store some other bit of information
1256 * in the high byte of the file length. Truncate size in case
1257 * this CDROM was mounted with the cruft option.
1258 */
1259
1260 if (sbi->s_cruft == 'y')
1261 inode->i_size &= 0x00ffffff;
1262
1263 if (de->interleave[0]) {
1264 printk("Interleaved files not (yet) supported.\n");
1265 inode->i_size = 0;
1266 }
1267
1268 /* I have no idea what file_unit_size is used for, so
1269 we will flag it for now */
1270 if (de->file_unit_size[0] != 0) {
1271 printk("File unit size != 0 for ISO file (%ld).\n",
1272 inode->i_ino);
1273 }
1274
1275 /* I have no idea what other flag bits are used for, so
1276 we will flag it for now */
1277 #ifdef DEBUG
1278 if((de->flags[-high_sierra] & ~2)!= 0){
1279 printk("Unusual flag settings for ISO file (%ld %x).\n",
1280 inode->i_ino, de->flags[-high_sierra]);
1281 }
1282 #endif
1283
1284 inode->i_mtime.tv_sec =
1285 inode->i_atime.tv_sec =
1286 inode->i_ctime.tv_sec = iso_date(de->date, high_sierra);
1287 inode->i_mtime.tv_nsec =
1288 inode->i_atime.tv_nsec =
1289 inode->i_ctime.tv_nsec = 0;
1290
1291 ei->i_first_extent = (isonum_733 (de->extent) +
1292 isonum_711 (de->ext_attr_length));
1293
1294 /* Set the number of blocks for stat() - should be done before RR */
1295 inode->i_blksize = PAGE_CACHE_SIZE; /* For stat() only */
1296 inode->i_blocks = (inode->i_size + 511) >> 9;
1297
1298 /*
1299 * Now test for possible Rock Ridge extensions which will override
1300 * some of these numbers in the inode structure.
1301 */
1302
1303 if (!high_sierra) {
1304 parse_rock_ridge_inode(de, inode);
1305 /* if we want uid/gid set, override the rock ridge setting */
1306 test_and_set_uid(&inode->i_uid, sbi->s_uid);
1307 test_and_set_gid(&inode->i_gid, sbi->s_gid);
1308 }
1309
1310 /* Install the inode operations vector */
1311 if (S_ISREG(inode->i_mode)) {
1312 inode->i_fop = &generic_ro_fops;
1313 switch ( ei->i_file_format ) {
1314 #ifdef CONFIG_ZISOFS
1315 case isofs_file_compressed:
1316 inode->i_data.a_ops = &zisofs_aops;
1317 break;
1318 #endif
1319 default:
1320 inode->i_data.a_ops = &isofs_aops;
1321 break;
1322 }
1323 } else if (S_ISDIR(inode->i_mode)) {
1324 inode->i_op = &isofs_dir_inode_operations;
1325 inode->i_fop = &isofs_dir_operations;
1326 } else if (S_ISLNK(inode->i_mode)) {
1327 inode->i_op = &page_symlink_inode_operations;
1328 inode->i_data.a_ops = &isofs_symlink_aops;
1329 } else
1330 /* XXX - parse_rock_ridge_inode() had already set i_rdev. */
1331 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1332
1333 out:
1334 kfree(tmpde);
1335 if (bh)
1336 brelse(bh);
1337 return;
1338
1339 out_badread:
1340 printk(KERN_WARNING "ISOFS: unable to read i-node block\n");
1341 fail:
1342 make_bad_inode(inode);
1343 goto out;
1344 }
1345
1346 struct isofs_iget5_callback_data {
1347 unsigned long block;
1348 unsigned long offset;
1349 };
1350
1351 static int isofs_iget5_test(struct inode *ino, void *data)
1352 {
1353 struct iso_inode_info *i = ISOFS_I(ino);
1354 struct isofs_iget5_callback_data *d =
1355 (struct isofs_iget5_callback_data*)data;
1356 return (i->i_iget5_block == d->block)
1357 && (i->i_iget5_offset == d->offset);
1358 }
1359
1360 static int isofs_iget5_set(struct inode *ino, void *data)
1361 {
1362 struct iso_inode_info *i = ISOFS_I(ino);
1363 struct isofs_iget5_callback_data *d =
1364 (struct isofs_iget5_callback_data*)data;
1365 i->i_iget5_block = d->block;
1366 i->i_iget5_offset = d->offset;
1367 return 0;
1368 }
1369
1370 /* Store, in the inode's containing structure, the block and block
1371 * offset that point to the underlying meta-data for the inode. The
1372 * code below is otherwise similar to the iget() code in
1373 * include/linux/fs.h */
1374 struct inode *isofs_iget(struct super_block *sb,
1375 unsigned long block,
1376 unsigned long offset)
1377 {
1378 unsigned long hashval;
1379 struct inode *inode;
1380 struct isofs_iget5_callback_data data;
1381
1382 if (offset >= 1ul << sb->s_blocksize_bits)
1383 return NULL;
1384
1385 data.block = block;
1386 data.offset = offset;
1387
1388 hashval = (block << sb->s_blocksize_bits) | offset;
1389
1390 inode = iget5_locked(sb, hashval, &isofs_iget5_test,
1391 &isofs_iget5_set, &data);
1392
1393 if (inode && (inode->i_state & I_NEW)) {
1394 sb->s_op->read_inode(inode);
1395 unlock_new_inode(inode);
1396 }
1397
1398 return inode;
1399 }
1400
1401 static struct super_block *isofs_get_sb(struct file_system_type *fs_type,
1402 int flags, const char *dev_name, void *data)
1403 {
1404 return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super);
1405 }
1406
1407 static struct file_system_type iso9660_fs_type = {
1408 .owner = THIS_MODULE,
1409 .name = "iso9660",
1410 .get_sb = isofs_get_sb,
1411 .kill_sb = kill_block_super,
1412 .fs_flags = FS_REQUIRES_DEV,
1413 };
1414
1415 static int __init init_iso9660_fs(void)
1416 {
1417 int err = init_inodecache();
1418 if (err)
1419 goto out;
1420 #ifdef CONFIG_ZISOFS
1421 err = zisofs_init();
1422 if (err)
1423 goto out1;
1424 #endif
1425 err = register_filesystem(&iso9660_fs_type);
1426 if (err)
1427 goto out2;
1428 return 0;
1429 out2:
1430 #ifdef CONFIG_ZISOFS
1431 zisofs_cleanup();
1432 out1:
1433 #endif
1434 destroy_inodecache();
1435 out:
1436 return err;
1437 }
1438
1439 static void __exit exit_iso9660_fs(void)
1440 {
1441 unregister_filesystem(&iso9660_fs_type);
1442 #ifdef CONFIG_ZISOFS
1443 zisofs_cleanup();
1444 #endif
1445 destroy_inodecache();
1446 }
1447
1448 module_init(init_iso9660_fs)
1449 module_exit(exit_iso9660_fs)
1450 MODULE_LICENSE("GPL");
1451 /* Actual filesystem name is iso9660, as requested in filesystems.c */
1452 MODULE_ALIAS("iso9660");
kernel source for telekom puls (alcatel/mediatek)