Commit | Line | Data |
---|---|---|
09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * linux/fs/isofs/inode.c | |
4 | * | |
5 | * (C) 1991 Linus Torvalds - minix filesystem | |
6 | * 1992, 1993, 1994 Eric Youngdale Modified for ISO 9660 filesystem. | |
96de0e25 | 7 | * 1994 Eberhard Mönkeberg - multi session handling. |
1da177e4 LT |
8 | * 1995 Mark Dobie - allow mounting of some weird VideoCDs and PhotoCDs. |
9 | * 1997 Gordon Chaffee - Joliet CDs | |
10 | * 1998 Eric Lammerts - ISO 9660 Level 3 | |
11 | * 2004 Paul Serice - Inode Support pushed out from 4GB to 128GB | |
12 | * 2004 Paul Serice - NFS Export Operations | |
13 | */ | |
14 | ||
94f2f715 | 15 | #include <linux/init.h> |
1da177e4 LT |
16 | #include <linux/module.h> |
17 | ||
1da177e4 | 18 | #include <linux/slab.h> |
5b825c3a | 19 | #include <linux/cred.h> |
1da177e4 LT |
20 | #include <linux/nls.h> |
21 | #include <linux/ctype.h> | |
94f2f715 AV |
22 | #include <linux/statfs.h> |
23 | #include <linux/cdrom.h> | |
1da177e4 | 24 | #include <linux/parser.h> |
3069083c | 25 | #include <linux/mpage.h> |
ba64e2b9 | 26 | #include <linux/user_namespace.h> |
86a1da6d | 27 | #include <linux/seq_file.h> |
09a4e0be | 28 | #include <linux/blkdev.h> |
1da177e4 | 29 | |
94f2f715 | 30 | #include "isofs.h" |
1da177e4 LT |
31 | #include "zisofs.h" |
32 | ||
33 | #define BEQUIET | |
34 | ||
da53be12 | 35 | static int isofs_hashi(const struct dentry *parent, struct qstr *qstr); |
6fa67e70 | 36 | static int isofs_dentry_cmpi(const struct dentry *dentry, |
621e155a | 37 | unsigned int len, const char *str, const struct qstr *name); |
1da177e4 LT |
38 | |
39 | #ifdef CONFIG_JOLIET | |
da53be12 LT |
40 | static int isofs_hashi_ms(const struct dentry *parent, struct qstr *qstr); |
41 | static int isofs_hash_ms(const struct dentry *parent, struct qstr *qstr); | |
6fa67e70 | 42 | static int isofs_dentry_cmpi_ms(const struct dentry *dentry, |
621e155a | 43 | unsigned int len, const char *str, const struct qstr *name); |
6fa67e70 | 44 | static int isofs_dentry_cmp_ms(const struct dentry *dentry, |
621e155a | 45 | unsigned int len, const char *str, const struct qstr *name); |
1da177e4 LT |
46 | #endif |
47 | ||
48 | static void isofs_put_super(struct super_block *sb) | |
49 | { | |
50 | struct isofs_sb_info *sbi = ISOFS_SB(sb); | |
6cfd0148 | 51 | |
1da177e4 | 52 | #ifdef CONFIG_JOLIET |
6d729e44 | 53 | unload_nls(sbi->s_nls_iocharset); |
1da177e4 LT |
54 | #endif |
55 | ||
1da177e4 LT |
56 | kfree(sbi); |
57 | sb->s_fs_info = NULL; | |
58 | return; | |
59 | } | |
60 | ||
410dd3cf | 61 | static int isofs_read_inode(struct inode *, int relocated); |
726c3342 | 62 | static int isofs_statfs (struct dentry *, struct kstatfs *); |
86a1da6d | 63 | static int isofs_show_options(struct seq_file *, struct dentry *); |
1da177e4 | 64 | |
e18b890b | 65 | static struct kmem_cache *isofs_inode_cachep; |
1da177e4 LT |
66 | |
67 | static struct inode *isofs_alloc_inode(struct super_block *sb) | |
68 | { | |
69 | struct iso_inode_info *ei; | |
e94b1766 | 70 | ei = kmem_cache_alloc(isofs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
71 | if (!ei) |
72 | return NULL; | |
73 | return &ei->vfs_inode; | |
74 | } | |
75 | ||
07b01207 | 76 | static void isofs_free_inode(struct inode *inode) |
1da177e4 LT |
77 | { |
78 | kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode)); | |
79 | } | |
80 | ||
51cc5068 | 81 | static void init_once(void *foo) |
1da177e4 | 82 | { |
9eb7f2c6 | 83 | struct iso_inode_info *ei = foo; |
1da177e4 | 84 | |
a35afb83 | 85 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 86 | } |
c3ed85a3 | 87 | |
b3b749b7 | 88 | static int __init init_inodecache(void) |
1da177e4 LT |
89 | { |
90 | isofs_inode_cachep = kmem_cache_create("isofs_inode_cache", | |
c3ed85a3 DJ |
91 | sizeof(struct iso_inode_info), |
92 | 0, (SLAB_RECLAIM_ACCOUNT| | |
5d097056 | 93 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 94 | init_once); |
e96e8a1d | 95 | if (!isofs_inode_cachep) |
1da177e4 LT |
96 | return -ENOMEM; |
97 | return 0; | |
98 | } | |
99 | ||
100 | static void destroy_inodecache(void) | |
101 | { | |
8c0a8537 KS |
102 | /* |
103 | * Make sure all delayed rcu free inodes are flushed before we | |
104 | * destroy cache. | |
105 | */ | |
106 | rcu_barrier(); | |
1a1d92c1 | 107 | kmem_cache_destroy(isofs_inode_cachep); |
1da177e4 LT |
108 | } |
109 | ||
110 | static int isofs_remount(struct super_block *sb, int *flags, char *data) | |
111 | { | |
02b9984d | 112 | sync_filesystem(sb); |
1751e8a6 | 113 | if (!(*flags & SB_RDONLY)) |
17b7f7cf | 114 | return -EROFS; |
1da177e4 LT |
115 | return 0; |
116 | } | |
117 | ||
ee9b6d61 | 118 | static const struct super_operations isofs_sops = { |
1da177e4 | 119 | .alloc_inode = isofs_alloc_inode, |
07b01207 | 120 | .free_inode = isofs_free_inode, |
1da177e4 LT |
121 | .put_super = isofs_put_super, |
122 | .statfs = isofs_statfs, | |
123 | .remount_fs = isofs_remount, | |
86a1da6d | 124 | .show_options = isofs_show_options, |
1da177e4 LT |
125 | }; |
126 | ||
127 | ||
e16404ed | 128 | static const struct dentry_operations isofs_dentry_ops[] = { |
1da177e4 LT |
129 | { |
130 | .d_hash = isofs_hashi, | |
131 | .d_compare = isofs_dentry_cmpi, | |
132 | }, | |
133 | #ifdef CONFIG_JOLIET | |
134 | { | |
135 | .d_hash = isofs_hash_ms, | |
136 | .d_compare = isofs_dentry_cmp_ms, | |
137 | }, | |
138 | { | |
139 | .d_hash = isofs_hashi_ms, | |
140 | .d_compare = isofs_dentry_cmpi_ms, | |
9eb7f2c6 | 141 | }, |
1da177e4 LT |
142 | #endif |
143 | }; | |
144 | ||
145 | struct iso9660_options{ | |
5404ac8e | 146 | unsigned int rock:1; |
8711c67b | 147 | unsigned int joliet:1; |
5404ac8e JK |
148 | unsigned int cruft:1; |
149 | unsigned int hide:1; | |
150 | unsigned int showassoc:1; | |
151 | unsigned int nocompress:1; | |
152 | unsigned int overriderockperm:1; | |
153 | unsigned int uid_set:1; | |
154 | unsigned int gid_set:1; | |
155 | unsigned int utf8:1; | |
156 | unsigned char map; | |
1da177e4 LT |
157 | unsigned char check; |
158 | unsigned int blocksize; | |
7328bdd6 AV |
159 | umode_t fmode; |
160 | umode_t dmode; | |
ba64e2b9 EB |
161 | kgid_t gid; |
162 | kuid_t uid; | |
1da177e4 | 163 | char *iocharset; |
c3ed85a3 DJ |
164 | /* LVE */ |
165 | s32 session; | |
166 | s32 sbsector; | |
1da177e4 LT |
167 | }; |
168 | ||
1da177e4 LT |
169 | /* |
170 | * Compute the hash for the isofs name corresponding to the dentry. | |
171 | */ | |
172 | static int | |
8387ff25 | 173 | isofs_hashi_common(const struct dentry *dentry, struct qstr *qstr, int ms) |
1da177e4 LT |
174 | { |
175 | const char *name; | |
176 | int len; | |
177 | char c; | |
178 | unsigned long hash; | |
179 | ||
180 | len = qstr->len; | |
181 | name = qstr->name; | |
182 | if (ms) { | |
183 | while (len && name[len-1] == '.') | |
184 | len--; | |
185 | } | |
186 | ||
8387ff25 | 187 | hash = init_name_hash(dentry); |
1da177e4 LT |
188 | while (len--) { |
189 | c = tolower(*name++); | |
f17e121f | 190 | hash = partial_name_hash(c, hash); |
1da177e4 LT |
191 | } |
192 | qstr->hash = end_name_hash(hash); | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
197 | /* | |
621e155a | 198 | * Compare of two isofs names. |
1da177e4 | 199 | */ |
621e155a NP |
200 | static int isofs_dentry_cmp_common( |
201 | unsigned int len, const char *str, | |
202 | const struct qstr *name, int ms, int ci) | |
1da177e4 LT |
203 | { |
204 | int alen, blen; | |
205 | ||
206 | /* A filename cannot end in '.' or we treat it like it has none */ | |
621e155a NP |
207 | alen = name->len; |
208 | blen = len; | |
1da177e4 | 209 | if (ms) { |
621e155a | 210 | while (alen && name->name[alen-1] == '.') |
1da177e4 | 211 | alen--; |
621e155a | 212 | while (blen && str[blen-1] == '.') |
1da177e4 LT |
213 | blen--; |
214 | } | |
215 | if (alen == blen) { | |
621e155a | 216 | if (ci) { |
a97df427 | 217 | if (strncasecmp(name->name, str, alen) == 0) |
621e155a NP |
218 | return 0; |
219 | } else { | |
220 | if (strncmp(name->name, str, alen) == 0) | |
221 | return 0; | |
222 | } | |
1da177e4 LT |
223 | } |
224 | return 1; | |
225 | } | |
226 | ||
1da177e4 | 227 | static int |
da53be12 | 228 | isofs_hashi(const struct dentry *dentry, struct qstr *qstr) |
1da177e4 | 229 | { |
8387ff25 | 230 | return isofs_hashi_common(dentry, qstr, 0); |
1da177e4 LT |
231 | } |
232 | ||
1da177e4 | 233 | static int |
6fa67e70 | 234 | isofs_dentry_cmpi(const struct dentry *dentry, |
621e155a | 235 | unsigned int len, const char *str, const struct qstr *name) |
1da177e4 | 236 | { |
621e155a | 237 | return isofs_dentry_cmp_common(len, str, name, 0, 1); |
1da177e4 LT |
238 | } |
239 | ||
240 | #ifdef CONFIG_JOLIET | |
7ca2f234 AB |
241 | /* |
242 | * Compute the hash for the isofs name corresponding to the dentry. | |
243 | */ | |
244 | static int | |
8387ff25 | 245 | isofs_hash_common(const struct dentry *dentry, struct qstr *qstr, int ms) |
7ca2f234 AB |
246 | { |
247 | const char *name; | |
248 | int len; | |
249 | ||
250 | len = qstr->len; | |
251 | name = qstr->name; | |
252 | if (ms) { | |
253 | while (len && name[len-1] == '.') | |
254 | len--; | |
255 | } | |
256 | ||
8387ff25 | 257 | qstr->hash = full_name_hash(dentry, name, len); |
7ca2f234 AB |
258 | |
259 | return 0; | |
260 | } | |
261 | ||
1da177e4 | 262 | static int |
da53be12 | 263 | isofs_hash_ms(const struct dentry *dentry, struct qstr *qstr) |
1da177e4 | 264 | { |
8387ff25 | 265 | return isofs_hash_common(dentry, qstr, 1); |
1da177e4 LT |
266 | } |
267 | ||
268 | static int | |
da53be12 | 269 | isofs_hashi_ms(const struct dentry *dentry, struct qstr *qstr) |
1da177e4 | 270 | { |
8387ff25 | 271 | return isofs_hashi_common(dentry, qstr, 1); |
1da177e4 LT |
272 | } |
273 | ||
274 | static int | |
6fa67e70 | 275 | isofs_dentry_cmp_ms(const struct dentry *dentry, |
621e155a | 276 | unsigned int len, const char *str, const struct qstr *name) |
1da177e4 | 277 | { |
621e155a | 278 | return isofs_dentry_cmp_common(len, str, name, 1, 0); |
1da177e4 LT |
279 | } |
280 | ||
281 | static int | |
6fa67e70 | 282 | isofs_dentry_cmpi_ms(const struct dentry *dentry, |
621e155a | 283 | unsigned int len, const char *str, const struct qstr *name) |
1da177e4 | 284 | { |
621e155a | 285 | return isofs_dentry_cmp_common(len, str, name, 1, 1); |
1da177e4 LT |
286 | } |
287 | #endif | |
288 | ||
289 | enum { | |
290 | Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore, | |
291 | Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet, | |
292 | Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err, | |
52b680c8 | 293 | Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode, Opt_overriderockperm, |
1da177e4 LT |
294 | }; |
295 | ||
a447c093 | 296 | static const match_table_t tokens = { |
1da177e4 LT |
297 | {Opt_norock, "norock"}, |
298 | {Opt_nojoliet, "nojoliet"}, | |
299 | {Opt_unhide, "unhide"}, | |
9769f4eb JW |
300 | {Opt_hide, "hide"}, |
301 | {Opt_showassoc, "showassoc"}, | |
1da177e4 LT |
302 | {Opt_cruft, "cruft"}, |
303 | {Opt_utf8, "utf8"}, | |
304 | {Opt_iocharset, "iocharset=%s"}, | |
305 | {Opt_map_a, "map=acorn"}, | |
306 | {Opt_map_a, "map=a"}, | |
307 | {Opt_map_n, "map=normal"}, | |
308 | {Opt_map_n, "map=n"}, | |
309 | {Opt_map_o, "map=off"}, | |
310 | {Opt_map_o, "map=o"}, | |
311 | {Opt_session, "session=%u"}, | |
312 | {Opt_sb, "sbsector=%u"}, | |
313 | {Opt_check_r, "check=relaxed"}, | |
314 | {Opt_check_r, "check=r"}, | |
315 | {Opt_check_s, "check=strict"}, | |
316 | {Opt_check_s, "check=s"}, | |
317 | {Opt_uid, "uid=%u"}, | |
318 | {Opt_gid, "gid=%u"}, | |
319 | {Opt_mode, "mode=%u"}, | |
9b7880e7 | 320 | {Opt_dmode, "dmode=%u"}, |
52b680c8 | 321 | {Opt_overriderockperm, "overriderockperm"}, |
1da177e4 LT |
322 | {Opt_block, "block=%u"}, |
323 | {Opt_ignore, "conv=binary"}, | |
324 | {Opt_ignore, "conv=b"}, | |
325 | {Opt_ignore, "conv=text"}, | |
326 | {Opt_ignore, "conv=t"}, | |
327 | {Opt_ignore, "conv=mtext"}, | |
328 | {Opt_ignore, "conv=m"}, | |
329 | {Opt_ignore, "conv=auto"}, | |
330 | {Opt_ignore, "conv=a"}, | |
331 | {Opt_nocompress, "nocompress"}, | |
332 | {Opt_err, NULL} | |
333 | }; | |
334 | ||
9eb7f2c6 | 335 | static int parse_options(char *options, struct iso9660_options *popt) |
1da177e4 LT |
336 | { |
337 | char *p; | |
338 | int option; | |
339 | ||
340 | popt->map = 'n'; | |
5404ac8e JK |
341 | popt->rock = 1; |
342 | popt->joliet = 1; | |
343 | popt->cruft = 0; | |
344 | popt->hide = 0; | |
345 | popt->showassoc = 0; | |
1da177e4 LT |
346 | popt->check = 'u'; /* unset */ |
347 | popt->nocompress = 0; | |
348 | popt->blocksize = 1024; | |
52b680c8 | 349 | popt->fmode = popt->dmode = ISOFS_INVALID_MODE; |
5c4a656b JK |
350 | popt->uid_set = 0; |
351 | popt->gid_set = 0; | |
ba64e2b9 EB |
352 | popt->gid = GLOBAL_ROOT_GID; |
353 | popt->uid = GLOBAL_ROOT_UID; | |
1da177e4 LT |
354 | popt->iocharset = NULL; |
355 | popt->utf8 = 0; | |
52b680c8 | 356 | popt->overriderockperm = 0; |
1da177e4 LT |
357 | popt->session=-1; |
358 | popt->sbsector=-1; | |
359 | if (!options) | |
360 | return 1; | |
361 | ||
362 | while ((p = strsep(&options, ",")) != NULL) { | |
363 | int token; | |
364 | substring_t args[MAX_OPT_ARGS]; | |
365 | unsigned n; | |
366 | ||
367 | if (!*p) | |
368 | continue; | |
369 | ||
370 | token = match_token(p, tokens, args); | |
371 | switch (token) { | |
372 | case Opt_norock: | |
5404ac8e | 373 | popt->rock = 0; |
1da177e4 LT |
374 | break; |
375 | case Opt_nojoliet: | |
5404ac8e | 376 | popt->joliet = 0; |
1da177e4 | 377 | break; |
9769f4eb | 378 | case Opt_hide: |
5404ac8e | 379 | popt->hide = 1; |
9769f4eb | 380 | break; |
1da177e4 | 381 | case Opt_unhide: |
9769f4eb | 382 | case Opt_showassoc: |
5404ac8e | 383 | popt->showassoc = 1; |
1da177e4 LT |
384 | break; |
385 | case Opt_cruft: | |
5404ac8e | 386 | popt->cruft = 1; |
1da177e4 LT |
387 | break; |
388 | case Opt_utf8: | |
389 | popt->utf8 = 1; | |
390 | break; | |
391 | #ifdef CONFIG_JOLIET | |
392 | case Opt_iocharset: | |
4f34a513 | 393 | kfree(popt->iocharset); |
1da177e4 | 394 | popt->iocharset = match_strdup(&args[0]); |
4f34a513 CX |
395 | if (!popt->iocharset) |
396 | return 0; | |
1da177e4 LT |
397 | break; |
398 | #endif | |
399 | case Opt_map_a: | |
400 | popt->map = 'a'; | |
401 | break; | |
402 | case Opt_map_o: | |
403 | popt->map = 'o'; | |
404 | break; | |
405 | case Opt_map_n: | |
406 | popt->map = 'n'; | |
407 | break; | |
408 | case Opt_session: | |
409 | if (match_int(&args[0], &option)) | |
410 | return 0; | |
411 | n = option; | |
34363c05 JK |
412 | /* |
413 | * Track numbers are supposed to be in range 1-99, the | |
414 | * mount option starts indexing at 0. | |
415 | */ | |
416 | if (n >= 99) | |
1da177e4 LT |
417 | return 0; |
418 | popt->session = n + 1; | |
419 | break; | |
420 | case Opt_sb: | |
421 | if (match_int(&args[0], &option)) | |
422 | return 0; | |
423 | popt->sbsector = option; | |
424 | break; | |
425 | case Opt_check_r: | |
426 | popt->check = 'r'; | |
427 | break; | |
428 | case Opt_check_s: | |
429 | popt->check = 's'; | |
430 | break; | |
431 | case Opt_ignore: | |
432 | break; | |
433 | case Opt_uid: | |
434 | if (match_int(&args[0], &option)) | |
435 | return 0; | |
ba64e2b9 EB |
436 | popt->uid = make_kuid(current_user_ns(), option); |
437 | if (!uid_valid(popt->uid)) | |
438 | return 0; | |
5c4a656b | 439 | popt->uid_set = 1; |
1da177e4 LT |
440 | break; |
441 | case Opt_gid: | |
442 | if (match_int(&args[0], &option)) | |
443 | return 0; | |
ba64e2b9 EB |
444 | popt->gid = make_kgid(current_user_ns(), option); |
445 | if (!gid_valid(popt->gid)) | |
446 | return 0; | |
5c4a656b | 447 | popt->gid_set = 1; |
1da177e4 LT |
448 | break; |
449 | case Opt_mode: | |
450 | if (match_int(&args[0], &option)) | |
451 | return 0; | |
9b7880e7 JK |
452 | popt->fmode = option; |
453 | break; | |
454 | case Opt_dmode: | |
455 | if (match_int(&args[0], &option)) | |
456 | return 0; | |
457 | popt->dmode = option; | |
1da177e4 | 458 | break; |
52b680c8 JK |
459 | case Opt_overriderockperm: |
460 | popt->overriderockperm = 1; | |
461 | break; | |
1da177e4 LT |
462 | case Opt_block: |
463 | if (match_int(&args[0], &option)) | |
464 | return 0; | |
465 | n = option; | |
466 | if (n != 512 && n != 1024 && n != 2048) | |
467 | return 0; | |
468 | popt->blocksize = n; | |
469 | break; | |
470 | case Opt_nocompress: | |
471 | popt->nocompress = 1; | |
472 | break; | |
473 | default: | |
474 | return 0; | |
475 | } | |
476 | } | |
477 | return 1; | |
478 | } | |
479 | ||
86a1da6d DH |
480 | /* |
481 | * Display the mount options in /proc/mounts. | |
482 | */ | |
483 | static int isofs_show_options(struct seq_file *m, struct dentry *root) | |
484 | { | |
485 | struct isofs_sb_info *sbi = ISOFS_SB(root->d_sb); | |
486 | ||
487 | if (!sbi->s_rock) seq_puts(m, ",norock"); | |
488 | else if (!sbi->s_joliet_level) seq_puts(m, ",nojoliet"); | |
489 | if (sbi->s_cruft) seq_puts(m, ",cruft"); | |
490 | if (sbi->s_hide) seq_puts(m, ",hide"); | |
491 | if (sbi->s_nocompress) seq_puts(m, ",nocompress"); | |
492 | if (sbi->s_overriderockperm) seq_puts(m, ",overriderockperm"); | |
493 | if (sbi->s_showassoc) seq_puts(m, ",showassoc"); | |
494 | if (sbi->s_utf8) seq_puts(m, ",utf8"); | |
495 | ||
496 | if (sbi->s_check) seq_printf(m, ",check=%c", sbi->s_check); | |
497 | if (sbi->s_mapping) seq_printf(m, ",map=%c", sbi->s_mapping); | |
fdb254db | 498 | if (sbi->s_session != 255) seq_printf(m, ",session=%u", sbi->s_session - 1); |
86a1da6d DH |
499 | if (sbi->s_sbsector != -1) seq_printf(m, ",sbsector=%u", sbi->s_sbsector); |
500 | ||
501 | if (root->d_sb->s_blocksize != 1024) | |
502 | seq_printf(m, ",blocksize=%lu", root->d_sb->s_blocksize); | |
503 | ||
504 | if (sbi->s_uid_set) | |
505 | seq_printf(m, ",uid=%u", | |
506 | from_kuid_munged(&init_user_ns, sbi->s_uid)); | |
507 | if (sbi->s_gid_set) | |
508 | seq_printf(m, ",gid=%u", | |
509 | from_kgid_munged(&init_user_ns, sbi->s_gid)); | |
510 | ||
511 | if (sbi->s_dmode != ISOFS_INVALID_MODE) | |
512 | seq_printf(m, ",dmode=%o", sbi->s_dmode); | |
513 | if (sbi->s_fmode != ISOFS_INVALID_MODE) | |
514 | seq_printf(m, ",fmode=%o", sbi->s_fmode); | |
515 | ||
0ab0b271 | 516 | #ifdef CONFIG_JOLIET |
86a1da6d DH |
517 | if (sbi->s_nls_iocharset && |
518 | strcmp(sbi->s_nls_iocharset->charset, CONFIG_NLS_DEFAULT) != 0) | |
519 | seq_printf(m, ",iocharset=%s", sbi->s_nls_iocharset->charset); | |
0ab0b271 | 520 | #endif |
86a1da6d DH |
521 | return 0; |
522 | } | |
523 | ||
1da177e4 LT |
524 | /* |
525 | * look if the driver can tell the multi session redirection value | |
526 | * | |
527 | * don't change this if you don't know what you do, please! | |
528 | * Multisession is legal only with XA disks. | |
529 | * A non-XA disk with more than one volume descriptor may do it right, but | |
530 | * usually is written in a nowhere standardized "multi-partition" manner. | |
531 | * Multisession uses absolute addressing (solely the first frame of the whole | |
532 | * track is #0), multi-partition uses relative addressing (each first frame of | |
533 | * each track is #0), and a track is not a session. | |
534 | * | |
535 | * A broken CDwriter software or drive firmware does not set new standards, | |
536 | * at least not if conflicting with the existing ones. | |
537 | * | |
538 | * emoenke@gwdg.de | |
539 | */ | |
540 | #define WE_OBEY_THE_WRITTEN_STANDARDS 1 | |
541 | ||
9eb7f2c6 | 542 | static unsigned int isofs_get_last_session(struct super_block *sb, s32 session) |
1da177e4 LT |
543 | { |
544 | struct cdrom_multisession ms_info; | |
545 | unsigned int vol_desc_start; | |
546 | struct block_device *bdev = sb->s_bdev; | |
547 | int i; | |
548 | ||
549 | vol_desc_start=0; | |
550 | ms_info.addr_format=CDROM_LBA; | |
34363c05 | 551 | if (session > 0) { |
1da177e4 LT |
552 | struct cdrom_tocentry Te; |
553 | Te.cdte_track=session; | |
554 | Te.cdte_format=CDROM_LBA; | |
555 | i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te); | |
556 | if (!i) { | |
c3ed85a3 DJ |
557 | printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n", |
558 | session, Te.cdte_addr.lba, | |
559 | Te.cdte_ctrl&CDROM_DATA_TRACK); | |
1da177e4 LT |
560 | if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4) |
561 | return Te.cdte_addr.lba; | |
562 | } | |
c3ed85a3 DJ |
563 | |
564 | printk(KERN_ERR "ISOFS: Invalid session number or type of track\n"); | |
1da177e4 LT |
565 | } |
566 | i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info); | |
9eb7f2c6 | 567 | if (session > 0) |
c3ed85a3 | 568 | printk(KERN_ERR "ISOFS: Invalid session number\n"); |
1da177e4 | 569 | #if 0 |
c3ed85a3 | 570 | printk(KERN_DEBUG "isofs.inode: CDROMMULTISESSION: rc=%d\n",i); |
1da177e4 | 571 | if (i==0) { |
c3ed85a3 DJ |
572 | printk(KERN_DEBUG "isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no"); |
573 | printk(KERN_DEBUG "isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba); | |
1da177e4 LT |
574 | } |
575 | #endif | |
576 | if (i==0) | |
577 | #if WE_OBEY_THE_WRITTEN_STANDARDS | |
c3ed85a3 | 578 | if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */ |
1da177e4 | 579 | #endif |
c3ed85a3 | 580 | vol_desc_start=ms_info.addr.lba; |
1da177e4 LT |
581 | return vol_desc_start; |
582 | } | |
583 | ||
e45c9eff OZ |
584 | /* |
585 | * Check if root directory is empty (has less than 3 files). | |
586 | * | |
587 | * Used to detect broken CDs where ISO root directory is empty but Joliet root | |
588 | * directory is OK. If such CD has Rock Ridge extensions, they will be disabled | |
589 | * (and Joliet used instead) or else no files would be visible. | |
590 | */ | |
591 | static bool rootdir_empty(struct super_block *sb, unsigned long block) | |
592 | { | |
593 | int offset = 0, files = 0, de_len; | |
594 | struct iso_directory_record *de; | |
595 | struct buffer_head *bh; | |
596 | ||
597 | bh = sb_bread(sb, block); | |
598 | if (!bh) | |
599 | return true; | |
600 | while (files < 3) { | |
601 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
602 | de_len = *(unsigned char *) de; | |
603 | if (de_len == 0) | |
604 | break; | |
605 | files++; | |
606 | offset += de_len; | |
607 | } | |
608 | brelse(bh); | |
609 | return files < 3; | |
610 | } | |
611 | ||
1da177e4 LT |
612 | /* |
613 | * Initialize the superblock and read the root inode. | |
614 | * | |
615 | * Note: a check_disk_change() has been done immediately prior | |
616 | * to this call, so we don't need to check again. | |
617 | */ | |
618 | static int isofs_fill_super(struct super_block *s, void *data, int silent) | |
619 | { | |
c3ed85a3 DJ |
620 | struct buffer_head *bh = NULL, *pri_bh = NULL; |
621 | struct hs_primary_descriptor *h_pri = NULL; | |
622 | struct iso_primary_descriptor *pri = NULL; | |
1da177e4 | 623 | struct iso_supplementary_descriptor *sec = NULL; |
c3ed85a3 DJ |
624 | struct iso_directory_record *rootp; |
625 | struct inode *inode; | |
626 | struct iso9660_options opt; | |
627 | struct isofs_sb_info *sbi; | |
628 | unsigned long first_data_zone; | |
629 | int joliet_level = 0; | |
630 | int iso_blknum, block; | |
631 | int orig_zonesize; | |
c4386c83 | 632 | int table, error = -EINVAL; |
c3ed85a3 | 633 | unsigned int vol_desc_start; |
1da177e4 | 634 | |
f8314dc6 | 635 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
4f819a78 | 636 | if (!sbi) |
1da177e4 LT |
637 | return -ENOMEM; |
638 | s->s_fs_info = sbi; | |
1da177e4 | 639 | |
9eb7f2c6 | 640 | if (!parse_options((char *)data, &opt)) |
1da177e4 LT |
641 | goto out_freesbi; |
642 | ||
643 | /* | |
644 | * First of all, get the hardware blocksize for this device. | |
645 | * If we don't know what it is, or the hardware blocksize is | |
646 | * larger than the blocksize the user specified, then use | |
647 | * that value. | |
648 | */ | |
649 | /* | |
650 | * What if bugger tells us to go beyond page size? | |
651 | */ | |
09a4e0be ES |
652 | if (bdev_logical_block_size(s->s_bdev) > 2048) { |
653 | printk(KERN_WARNING | |
654 | "ISOFS: unsupported/invalid hardware sector size %d\n", | |
655 | bdev_logical_block_size(s->s_bdev)); | |
656 | goto out_freesbi; | |
657 | } | |
1da177e4 LT |
658 | opt.blocksize = sb_min_blocksize(s, opt.blocksize); |
659 | ||
660 | sbi->s_high_sierra = 0; /* default is iso9660 */ | |
86a1da6d DH |
661 | sbi->s_session = opt.session; |
662 | sbi->s_sbsector = opt.sbsector; | |
1da177e4 LT |
663 | |
664 | vol_desc_start = (opt.sbsector != -1) ? | |
665 | opt.sbsector : isofs_get_last_session(s,opt.session); | |
666 | ||
c3ed85a3 DJ |
667 | for (iso_blknum = vol_desc_start+16; |
668 | iso_blknum < vol_desc_start+100; iso_blknum++) { | |
669 | struct hs_volume_descriptor *hdp; | |
670 | struct iso_volume_descriptor *vdp; | |
671 | ||
672 | block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits); | |
673 | if (!(bh = sb_bread(s, block))) | |
674 | goto out_no_read; | |
675 | ||
676 | vdp = (struct iso_volume_descriptor *)bh->b_data; | |
677 | hdp = (struct hs_volume_descriptor *)bh->b_data; | |
678 | ||
679 | /* | |
680 | * Due to the overlapping physical location of the descriptors, | |
681 | * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure | |
682 | * proper identification in this case, we first check for ISO. | |
683 | */ | |
684 | if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) { | |
685 | if (isonum_711(vdp->type) == ISO_VD_END) | |
686 | break; | |
687 | if (isonum_711(vdp->type) == ISO_VD_PRIMARY) { | |
e96e8a1d | 688 | if (!pri) { |
c3ed85a3 DJ |
689 | pri = (struct iso_primary_descriptor *)vdp; |
690 | /* Save the buffer in case we need it ... */ | |
691 | pri_bh = bh; | |
692 | bh = NULL; | |
693 | } | |
694 | } | |
1da177e4 | 695 | #ifdef CONFIG_JOLIET |
c3ed85a3 DJ |
696 | else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) { |
697 | sec = (struct iso_supplementary_descriptor *)vdp; | |
698 | if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) { | |
8711c67b | 699 | if (opt.joliet) { |
c3ed85a3 DJ |
700 | if (sec->escape[2] == 0x40) |
701 | joliet_level = 1; | |
702 | else if (sec->escape[2] == 0x43) | |
703 | joliet_level = 2; | |
704 | else if (sec->escape[2] == 0x45) | |
705 | joliet_level = 3; | |
706 | ||
707 | printk(KERN_DEBUG "ISO 9660 Extensions: " | |
708 | "Microsoft Joliet Level %d\n", | |
709 | joliet_level); | |
710 | } | |
711 | goto root_found; | |
712 | } else { | |
713 | /* Unknown supplementary volume descriptor */ | |
714 | sec = NULL; | |
715 | } | |
1da177e4 | 716 | } |
1da177e4 | 717 | #endif |
c3ed85a3 DJ |
718 | } else { |
719 | if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) { | |
720 | if (isonum_711(hdp->type) != ISO_VD_PRIMARY) | |
721 | goto out_freebh; | |
722 | ||
723 | sbi->s_high_sierra = 1; | |
5404ac8e | 724 | opt.rock = 0; |
c3ed85a3 DJ |
725 | h_pri = (struct hs_primary_descriptor *)vdp; |
726 | goto root_found; | |
727 | } | |
1da177e4 | 728 | } |
1da177e4 | 729 | |
c3ed85a3 | 730 | /* Just skip any volume descriptors we don't recognize */ |
1da177e4 | 731 | |
c3ed85a3 DJ |
732 | brelse(bh); |
733 | bh = NULL; | |
1da177e4 LT |
734 | } |
735 | /* | |
736 | * If we fall through, either no volume descriptor was found, | |
737 | * or else we passed a primary descriptor looking for others. | |
738 | */ | |
739 | if (!pri) | |
740 | goto out_unknown_format; | |
741 | brelse(bh); | |
742 | bh = pri_bh; | |
743 | pri_bh = NULL; | |
744 | ||
745 | root_found: | |
a2ed0b39 | 746 | /* We don't support read-write mounts */ |
bc98a42c | 747 | if (!sb_rdonly(s)) { |
a2ed0b39 JK |
748 | error = -EACCES; |
749 | goto out_freebh; | |
750 | } | |
1da177e4 | 751 | |
e96e8a1d | 752 | if (joliet_level && (!pri || !opt.rock)) { |
c3ed85a3 DJ |
753 | /* This is the case of Joliet with the norock mount flag. |
754 | * A disc with both Joliet and Rock Ridge is handled later | |
755 | */ | |
756 | pri = (struct iso_primary_descriptor *) sec; | |
1da177e4 LT |
757 | } |
758 | ||
759 | if(sbi->s_high_sierra){ | |
c3ed85a3 DJ |
760 | rootp = (struct iso_directory_record *) h_pri->root_directory_record; |
761 | sbi->s_nzones = isonum_733(h_pri->volume_space_size); | |
762 | sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size); | |
763 | sbi->s_max_size = isonum_733(h_pri->volume_space_size); | |
1da177e4 | 764 | } else { |
c3ed85a3 DJ |
765 | if (!pri) |
766 | goto out_freebh; | |
767 | rootp = (struct iso_directory_record *) pri->root_directory_record; | |
768 | sbi->s_nzones = isonum_733(pri->volume_space_size); | |
769 | sbi->s_log_zone_size = isonum_723(pri->logical_block_size); | |
770 | sbi->s_max_size = isonum_733(pri->volume_space_size); | |
1da177e4 LT |
771 | } |
772 | ||
773 | sbi->s_ninodes = 0; /* No way to figure this out easily */ | |
774 | ||
775 | orig_zonesize = sbi->s_log_zone_size; | |
776 | /* | |
777 | * If the zone size is smaller than the hardware sector size, | |
778 | * this is a fatal error. This would occur if the disc drive | |
779 | * had sectors that were 2048 bytes, but the filesystem had | |
780 | * blocks that were 512 bytes (which should only very rarely | |
781 | * happen.) | |
782 | */ | |
c3ed85a3 | 783 | if (orig_zonesize < opt.blocksize) |
1da177e4 LT |
784 | goto out_bad_size; |
785 | ||
786 | /* RDE: convert log zone size to bit shift */ | |
c3ed85a3 DJ |
787 | switch (sbi->s_log_zone_size) { |
788 | case 512: sbi->s_log_zone_size = 9; break; | |
789 | case 1024: sbi->s_log_zone_size = 10; break; | |
790 | case 2048: sbi->s_log_zone_size = 11; break; | |
1da177e4 | 791 | |
c3ed85a3 | 792 | default: |
1da177e4 | 793 | goto out_bad_zone_size; |
c3ed85a3 | 794 | } |
1da177e4 LT |
795 | |
796 | s->s_magic = ISOFS_SUPER_MAGIC; | |
66a362a2 JA |
797 | |
798 | /* | |
799 | * With multi-extent files, file size is only limited by the maximum | |
800 | * size of a file system, which is 8 TB. | |
801 | */ | |
802 | s->s_maxbytes = 0x80000000000LL; | |
1da177e4 | 803 | |
1da177e4 LT |
804 | /* Set this for reference. Its not currently used except on write |
805 | which we don't have .. */ | |
c3ed85a3 DJ |
806 | |
807 | first_data_zone = isonum_733(rootp->extent) + | |
808 | isonum_711(rootp->ext_attr_length); | |
1da177e4 LT |
809 | sbi->s_firstdatazone = first_data_zone; |
810 | #ifndef BEQUIET | |
c3ed85a3 DJ |
811 | printk(KERN_DEBUG "ISOFS: Max size:%ld Log zone size:%ld\n", |
812 | sbi->s_max_size, 1UL << sbi->s_log_zone_size); | |
813 | printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone); | |
1da177e4 | 814 | if(sbi->s_high_sierra) |
c3ed85a3 | 815 | printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n"); |
1da177e4 LT |
816 | #endif |
817 | ||
818 | /* | |
819 | * If the Joliet level is set, we _may_ decide to use the | |
820 | * secondary descriptor, but can't be sure until after we | |
821 | * read the root inode. But before reading the root inode | |
822 | * we may need to change the device blocksize, and would | |
823 | * rather release the old buffer first. So, we cache the | |
824 | * first_data_zone value from the secondary descriptor. | |
825 | */ | |
826 | if (joliet_level) { | |
827 | pri = (struct iso_primary_descriptor *) sec; | |
828 | rootp = (struct iso_directory_record *) | |
829 | pri->root_directory_record; | |
c3ed85a3 DJ |
830 | first_data_zone = isonum_733(rootp->extent) + |
831 | isonum_711(rootp->ext_attr_length); | |
1da177e4 LT |
832 | } |
833 | ||
834 | /* | |
835 | * We're all done using the volume descriptor, and may need | |
836 | * to change the device blocksize, so release the buffer now. | |
837 | */ | |
838 | brelse(pri_bh); | |
839 | brelse(bh); | |
840 | ||
841 | /* | |
842 | * Force the blocksize to 512 for 512 byte sectors. The file | |
843 | * read primitives really get it wrong in a bad way if we don't | |
844 | * do this. | |
845 | * | |
846 | * Note - we should never be setting the blocksize to something | |
847 | * less than the hardware sector size for the device. If we | |
848 | * do, we would end up having to read larger buffers and split | |
849 | * out portions to satisfy requests. | |
850 | * | |
851 | * Note2- the idea here is that we want to deal with the optimal | |
852 | * zonesize in the filesystem. If we have it set to something less, | |
853 | * then we have horrible problems with trying to piece together | |
854 | * bits of adjacent blocks in order to properly read directory | |
855 | * entries. By forcing the blocksize in this way, we ensure | |
856 | * that we will never be required to do this. | |
857 | */ | |
858 | sb_set_blocksize(s, orig_zonesize); | |
859 | ||
860 | sbi->s_nls_iocharset = NULL; | |
861 | ||
862 | #ifdef CONFIG_JOLIET | |
863 | if (joliet_level && opt.utf8 == 0) { | |
c3ed85a3 | 864 | char *p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT; |
1da177e4 LT |
865 | sbi->s_nls_iocharset = load_nls(p); |
866 | if (! sbi->s_nls_iocharset) { | |
867 | /* Fail only if explicit charset specified */ | |
868 | if (opt.iocharset) | |
869 | goto out_freesbi; | |
870 | sbi->s_nls_iocharset = load_nls_default(); | |
871 | } | |
872 | } | |
873 | #endif | |
874 | s->s_op = &isofs_sops; | |
875 | s->s_export_op = &isofs_export_ops; | |
876 | sbi->s_mapping = opt.map; | |
5404ac8e | 877 | sbi->s_rock = (opt.rock ? 2 : 0); |
1da177e4 LT |
878 | sbi->s_rock_offset = -1; /* initial offset, will guess until SP is found*/ |
879 | sbi->s_cruft = opt.cruft; | |
9769f4eb JW |
880 | sbi->s_hide = opt.hide; |
881 | sbi->s_showassoc = opt.showassoc; | |
1da177e4 LT |
882 | sbi->s_uid = opt.uid; |
883 | sbi->s_gid = opt.gid; | |
5c4a656b JK |
884 | sbi->s_uid_set = opt.uid_set; |
885 | sbi->s_gid_set = opt.gid_set; | |
1da177e4 LT |
886 | sbi->s_utf8 = opt.utf8; |
887 | sbi->s_nocompress = opt.nocompress; | |
52b680c8 | 888 | sbi->s_overriderockperm = opt.overriderockperm; |
1da177e4 LT |
889 | /* |
890 | * It would be incredibly stupid to allow people to mark every file | |
891 | * on the disk as suid, so we merely allow them to set the default | |
892 | * permissions. | |
893 | */ | |
52b680c8 JK |
894 | if (opt.fmode != ISOFS_INVALID_MODE) |
895 | sbi->s_fmode = opt.fmode & 0777; | |
896 | else | |
897 | sbi->s_fmode = ISOFS_INVALID_MODE; | |
898 | if (opt.dmode != ISOFS_INVALID_MODE) | |
899 | sbi->s_dmode = opt.dmode & 0777; | |
900 | else | |
901 | sbi->s_dmode = ISOFS_INVALID_MODE; | |
1da177e4 LT |
902 | |
903 | /* | |
904 | * Read the root inode, which _may_ result in changing | |
905 | * the s_rock flag. Once we have the final s_rock value, | |
906 | * we then decide whether to use the Joliet descriptor. | |
907 | */ | |
908 | inode = isofs_iget(s, sbi->s_firstdatazone, 0); | |
c4386c83 DH |
909 | if (IS_ERR(inode)) |
910 | goto out_no_root; | |
1da177e4 | 911 | |
e45c9eff OZ |
912 | /* |
913 | * Fix for broken CDs with Rock Ridge and empty ISO root directory but | |
914 | * correct Joliet root directory. | |
915 | */ | |
916 | if (sbi->s_rock == 1 && joliet_level && | |
917 | rootdir_empty(s, sbi->s_firstdatazone)) { | |
918 | printk(KERN_NOTICE | |
919 | "ISOFS: primary root directory is empty. " | |
920 | "Disabling Rock Ridge and switching to Joliet."); | |
921 | sbi->s_rock = 0; | |
922 | } | |
923 | ||
1da177e4 LT |
924 | /* |
925 | * If this disk has both Rock Ridge and Joliet on it, then we | |
926 | * want to use Rock Ridge by default. This can be overridden | |
927 | * by using the norock mount option. There is still one other | |
928 | * possibility that is not taken into account: a Rock Ridge | |
929 | * CD with Unicode names. Until someone sees such a beast, it | |
930 | * will not be supported. | |
931 | */ | |
932 | if (sbi->s_rock == 1) { | |
933 | joliet_level = 0; | |
934 | } else if (joliet_level) { | |
935 | sbi->s_rock = 0; | |
936 | if (sbi->s_firstdatazone != first_data_zone) { | |
937 | sbi->s_firstdatazone = first_data_zone; | |
c3ed85a3 | 938 | printk(KERN_DEBUG |
1da177e4 LT |
939 | "ISOFS: changing to secondary root\n"); |
940 | iput(inode); | |
941 | inode = isofs_iget(s, sbi->s_firstdatazone, 0); | |
c4386c83 DH |
942 | if (IS_ERR(inode)) |
943 | goto out_no_root; | |
1da177e4 LT |
944 | } |
945 | } | |
946 | ||
947 | if (opt.check == 'u') { | |
948 | /* Only Joliet is case insensitive by default */ | |
c3ed85a3 DJ |
949 | if (joliet_level) |
950 | opt.check = 'r'; | |
951 | else | |
952 | opt.check = 's'; | |
1da177e4 LT |
953 | } |
954 | sbi->s_joliet_level = joliet_level; | |
955 | ||
817794e0 KK |
956 | /* Make sure the root inode is a directory */ |
957 | if (!S_ISDIR(inode->i_mode)) { | |
958 | printk(KERN_WARNING | |
959 | "isofs_fill_super: root inode is not a directory. " | |
960 | "Corrupted media?\n"); | |
961 | goto out_iput; | |
962 | } | |
963 | ||
1da177e4 | 964 | table = 0; |
c3ed85a3 DJ |
965 | if (joliet_level) |
966 | table += 2; | |
967 | if (opt.check == 'r') | |
968 | table++; | |
86a1da6d | 969 | sbi->s_check = opt.check; |
6cc9c1d2 | 970 | |
b0afd8e5 AV |
971 | if (table) |
972 | s->s_d_op = &isofs_dentry_ops[table - 1]; | |
6cc9c1d2 AV |
973 | |
974 | /* get the root dentry */ | |
48fde701 | 975 | s->s_root = d_make_root(inode); |
8fdd8c49 | 976 | if (!(s->s_root)) { |
8fdd8c49 AV |
977 | error = -ENOMEM; |
978 | goto out_no_inode; | |
979 | } | |
1da177e4 | 980 | |
f99d49ad | 981 | kfree(opt.iocharset); |
1da177e4 LT |
982 | |
983 | return 0; | |
984 | ||
985 | /* | |
986 | * Display error messages and free resources. | |
987 | */ | |
1da177e4 LT |
988 | out_iput: |
989 | iput(inode); | |
c4386c83 DH |
990 | goto out_no_inode; |
991 | out_no_root: | |
992 | error = PTR_ERR(inode); | |
993 | if (error != -ENOMEM) | |
994 | printk(KERN_WARNING "%s: get root inode failed\n", __func__); | |
995 | out_no_inode: | |
1da177e4 | 996 | #ifdef CONFIG_JOLIET |
6d729e44 | 997 | unload_nls(sbi->s_nls_iocharset); |
1da177e4 LT |
998 | #endif |
999 | goto out_freesbi; | |
1000 | out_no_read: | |
c3ed85a3 DJ |
1001 | printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n", |
1002 | __func__, s->s_id, iso_blknum, block); | |
c11760c6 | 1003 | goto out_freebh; |
1da177e4 | 1004 | out_bad_zone_size: |
c3ed85a3 | 1005 | printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n", |
1da177e4 LT |
1006 | sbi->s_log_zone_size); |
1007 | goto out_freebh; | |
1008 | out_bad_size: | |
c3ed85a3 | 1009 | printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n", |
1da177e4 LT |
1010 | orig_zonesize, opt.blocksize); |
1011 | goto out_freebh; | |
1012 | out_unknown_format: | |
1013 | if (!silent) | |
c3ed85a3 | 1014 | printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n"); |
1da177e4 LT |
1015 | |
1016 | out_freebh: | |
1017 | brelse(bh); | |
c11760c6 | 1018 | brelse(pri_bh); |
1da177e4 | 1019 | out_freesbi: |
f99d49ad | 1020 | kfree(opt.iocharset); |
1da177e4 LT |
1021 | kfree(sbi); |
1022 | s->s_fs_info = NULL; | |
c4386c83 | 1023 | return error; |
1da177e4 LT |
1024 | } |
1025 | ||
726c3342 | 1026 | static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1027 | { |
726c3342 | 1028 | struct super_block *sb = dentry->d_sb; |
2430c4da | 1029 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 1030 | |
1da177e4 LT |
1031 | buf->f_type = ISOFS_SUPER_MAGIC; |
1032 | buf->f_bsize = sb->s_blocksize; | |
1033 | buf->f_blocks = (ISOFS_SB(sb)->s_nzones | |
c3ed85a3 | 1034 | << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits)); |
1da177e4 LT |
1035 | buf->f_bfree = 0; |
1036 | buf->f_bavail = 0; | |
1037 | buf->f_files = ISOFS_SB(sb)->s_ninodes; | |
1038 | buf->f_ffree = 0; | |
2430c4da CL |
1039 | buf->f_fsid.val[0] = (u32)id; |
1040 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
1041 | buf->f_namelen = NAME_MAX; |
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | /* | |
1046 | * Get a set of blocks; filling in buffer_heads if already allocated | |
1047 | * or getblk() if they are not. Returns the number of blocks inserted | |
c4386c83 | 1048 | * (-ve == error.) |
1da177e4 | 1049 | */ |
fde214d4 | 1050 | int isofs_get_blocks(struct inode *inode, sector_t iblock, |
1da177e4 LT |
1051 | struct buffer_head **bh, unsigned long nblocks) |
1052 | { | |
fde214d4 | 1053 | unsigned long b_off = iblock; |
1da177e4 LT |
1054 | unsigned offset, sect_size; |
1055 | unsigned int firstext; | |
1056 | unsigned long nextblk, nextoff; | |
c4386c83 | 1057 | int section, rv, error; |
1da177e4 LT |
1058 | struct iso_inode_info *ei = ISOFS_I(inode); |
1059 | ||
c4386c83 | 1060 | error = -EIO; |
1da177e4 | 1061 | rv = 0; |
fde214d4 | 1062 | if (iblock != b_off) { |
c3ed85a3 | 1063 | printk(KERN_DEBUG "%s: block number too large\n", __func__); |
1da177e4 LT |
1064 | goto abort; |
1065 | } | |
1066 | ||
c3ed85a3 DJ |
1067 | |
1068 | offset = 0; | |
1069 | firstext = ei->i_first_extent; | |
1da177e4 | 1070 | sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode); |
c3ed85a3 DJ |
1071 | nextblk = ei->i_next_section_block; |
1072 | nextoff = ei->i_next_section_offset; | |
1073 | section = 0; | |
1da177e4 | 1074 | |
c3ed85a3 | 1075 | while (nblocks) { |
1da177e4 LT |
1076 | /* If we are *way* beyond the end of the file, print a message. |
1077 | * Access beyond the end of the file up to the next page boundary | |
1078 | * is normal, however because of the way the page cache works. | |
1079 | * In this case, we just return 0 so that we can properly fill | |
1080 | * the page with useless information without generating any | |
1081 | * I/O errors. | |
1082 | */ | |
09cbfeaf | 1083 | if (b_off > ((inode->i_size + PAGE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) { |
fde214d4 JK |
1084 | printk(KERN_DEBUG "%s: block >= EOF (%lu, %llu)\n", |
1085 | __func__, b_off, | |
1086 | (unsigned long long)inode->i_size); | |
1da177e4 LT |
1087 | goto abort; |
1088 | } | |
c3ed85a3 | 1089 | |
fb50ae74 JRV |
1090 | /* On the last section, nextblk == 0, section size is likely to |
1091 | * exceed sect_size by a partial block, and access beyond the | |
1092 | * end of the file will reach beyond the section size, too. | |
1093 | */ | |
1094 | while (nextblk && (b_off >= (offset + sect_size))) { | |
1095 | struct inode *ninode; | |
1096 | ||
1097 | offset += sect_size; | |
1098 | ninode = isofs_iget(inode->i_sb, nextblk, nextoff); | |
c4386c83 DH |
1099 | if (IS_ERR(ninode)) { |
1100 | error = PTR_ERR(ninode); | |
fb50ae74 | 1101 | goto abort; |
c4386c83 | 1102 | } |
fb50ae74 JRV |
1103 | firstext = ISOFS_I(ninode)->i_first_extent; |
1104 | sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode); | |
1105 | nextblk = ISOFS_I(ninode)->i_next_section_block; | |
1106 | nextoff = ISOFS_I(ninode)->i_next_section_offset; | |
1107 | iput(ninode); | |
1108 | ||
1109 | if (++section > 100) { | |
c3ed85a3 DJ |
1110 | printk(KERN_DEBUG "%s: More than 100 file sections ?!?" |
1111 | " aborting...\n", __func__); | |
fde214d4 | 1112 | printk(KERN_DEBUG "%s: block=%lu firstext=%u sect_size=%u " |
c3ed85a3 | 1113 | "nextblk=%lu nextoff=%lu\n", __func__, |
fde214d4 | 1114 | b_off, firstext, (unsigned) sect_size, |
c3ed85a3 | 1115 | nextblk, nextoff); |
fb50ae74 | 1116 | goto abort; |
1da177e4 LT |
1117 | } |
1118 | } | |
c3ed85a3 DJ |
1119 | |
1120 | if (*bh) { | |
1da177e4 LT |
1121 | map_bh(*bh, inode->i_sb, firstext + b_off - offset); |
1122 | } else { | |
1123 | *bh = sb_getblk(inode->i_sb, firstext+b_off-offset); | |
c3ed85a3 | 1124 | if (!*bh) |
1da177e4 LT |
1125 | goto abort; |
1126 | } | |
1127 | bh++; /* Next buffer head */ | |
1128 | b_off++; /* Next buffer offset */ | |
1129 | nblocks--; | |
1130 | rv++; | |
1131 | } | |
1132 | ||
c4386c83 | 1133 | error = 0; |
1da177e4 | 1134 | abort: |
c4386c83 | 1135 | return rv != 0 ? rv : error; |
1da177e4 LT |
1136 | } |
1137 | ||
1138 | /* | |
1139 | * Used by the standard interfaces. | |
1140 | */ | |
1141 | static int isofs_get_block(struct inode *inode, sector_t iblock, | |
1142 | struct buffer_head *bh_result, int create) | |
1143 | { | |
c4386c83 DH |
1144 | int ret; |
1145 | ||
9eb7f2c6 | 1146 | if (create) { |
c3ed85a3 | 1147 | printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__); |
1da177e4 LT |
1148 | return -EROFS; |
1149 | } | |
1150 | ||
c4386c83 DH |
1151 | ret = isofs_get_blocks(inode, iblock, &bh_result, 1); |
1152 | return ret < 0 ? ret : 0; | |
1da177e4 LT |
1153 | } |
1154 | ||
1155 | static int isofs_bmap(struct inode *inode, sector_t block) | |
1156 | { | |
1157 | struct buffer_head dummy; | |
1158 | int error; | |
1159 | ||
1160 | dummy.b_state = 0; | |
1161 | dummy.b_blocknr = -1000; | |
1162 | error = isofs_get_block(inode, block, &dummy, 0); | |
1163 | if (!error) | |
1164 | return dummy.b_blocknr; | |
1165 | return 0; | |
1166 | } | |
1167 | ||
1168 | struct buffer_head *isofs_bread(struct inode *inode, sector_t block) | |
1169 | { | |
1170 | sector_t blknr = isofs_bmap(inode, block); | |
1171 | if (!blknr) | |
1172 | return NULL; | |
1173 | return sb_bread(inode->i_sb, blknr); | |
1174 | } | |
1175 | ||
1176 | static int isofs_readpage(struct file *file, struct page *page) | |
1177 | { | |
3069083c NJ |
1178 | return mpage_readpage(page, isofs_get_block); |
1179 | } | |
1180 | ||
1181 | static int isofs_readpages(struct file *file, struct address_space *mapping, | |
1182 | struct list_head *pages, unsigned nr_pages) | |
1183 | { | |
1184 | return mpage_readpages(mapping, pages, nr_pages, isofs_get_block); | |
1da177e4 LT |
1185 | } |
1186 | ||
1187 | static sector_t _isofs_bmap(struct address_space *mapping, sector_t block) | |
1188 | { | |
1189 | return generic_block_bmap(mapping,block,isofs_get_block); | |
1190 | } | |
1191 | ||
f5e54d6e | 1192 | static const struct address_space_operations isofs_aops = { |
1da177e4 | 1193 | .readpage = isofs_readpage, |
3069083c | 1194 | .readpages = isofs_readpages, |
1da177e4 LT |
1195 | .bmap = _isofs_bmap |
1196 | }; | |
1197 | ||
9eb7f2c6 | 1198 | static int isofs_read_level3_size(struct inode *inode) |
1da177e4 LT |
1199 | { |
1200 | unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); | |
1201 | int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra; | |
c3ed85a3 | 1202 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1203 | unsigned long block, offset, block_saved, offset_saved; |
1204 | int i = 0; | |
1205 | int more_entries = 0; | |
c3ed85a3 | 1206 | struct iso_directory_record *tmpde = NULL; |
1da177e4 LT |
1207 | struct iso_inode_info *ei = ISOFS_I(inode); |
1208 | ||
1209 | inode->i_size = 0; | |
1210 | ||
1211 | /* The first 16 blocks are reserved as the System Area. Thus, | |
1212 | * no inodes can appear in block 0. We use this to flag that | |
1213 | * this is the last section. */ | |
1214 | ei->i_next_section_block = 0; | |
1215 | ei->i_next_section_offset = 0; | |
1216 | ||
1217 | block = ei->i_iget5_block; | |
1218 | offset = ei->i_iget5_offset; | |
1219 | ||
1220 | do { | |
c3ed85a3 | 1221 | struct iso_directory_record *de; |
1da177e4 LT |
1222 | unsigned int de_len; |
1223 | ||
1224 | if (!bh) { | |
1225 | bh = sb_bread(inode->i_sb, block); | |
1226 | if (!bh) | |
1227 | goto out_noread; | |
1228 | } | |
1229 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
1230 | de_len = *(unsigned char *) de; | |
1231 | ||
1232 | if (de_len == 0) { | |
1233 | brelse(bh); | |
1234 | bh = NULL; | |
1235 | ++block; | |
1236 | offset = 0; | |
1237 | continue; | |
1238 | } | |
1239 | ||
1240 | block_saved = block; | |
1241 | offset_saved = offset; | |
1242 | offset += de_len; | |
1243 | ||
1244 | /* Make sure we have a full directory entry */ | |
1245 | if (offset >= bufsize) { | |
1246 | int slop = bufsize - offset + de_len; | |
1247 | if (!tmpde) { | |
1248 | tmpde = kmalloc(256, GFP_KERNEL); | |
1249 | if (!tmpde) | |
1250 | goto out_nomem; | |
1251 | } | |
1252 | memcpy(tmpde, de, slop); | |
1253 | offset &= bufsize - 1; | |
1254 | block++; | |
1255 | brelse(bh); | |
1256 | bh = NULL; | |
1257 | if (offset) { | |
1258 | bh = sb_bread(inode->i_sb, block); | |
1259 | if (!bh) | |
1260 | goto out_noread; | |
9eb7f2c6 | 1261 | memcpy((void *)tmpde+slop, bh->b_data, offset); |
1da177e4 LT |
1262 | } |
1263 | de = tmpde; | |
1264 | } | |
1265 | ||
1266 | inode->i_size += isonum_733(de->size); | |
1267 | if (i == 1) { | |
1268 | ei->i_next_section_block = block_saved; | |
1269 | ei->i_next_section_offset = offset_saved; | |
1270 | } | |
1271 | ||
1272 | more_entries = de->flags[-high_sierra] & 0x80; | |
1273 | ||
1274 | i++; | |
9eb7f2c6 | 1275 | if (i > 100) |
1da177e4 | 1276 | goto out_toomany; |
9eb7f2c6 | 1277 | } while (more_entries); |
1da177e4 | 1278 | out: |
9eb7f2c6 | 1279 | kfree(tmpde); |
1da177e4 LT |
1280 | if (bh) |
1281 | brelse(bh); | |
1282 | return 0; | |
1283 | ||
1284 | out_nomem: | |
1285 | if (bh) | |
1286 | brelse(bh); | |
1287 | return -ENOMEM; | |
1288 | ||
1289 | out_noread: | |
1290 | printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block); | |
f99d49ad | 1291 | kfree(tmpde); |
1da177e4 LT |
1292 | return -EIO; |
1293 | ||
1294 | out_toomany: | |
c3ed85a3 DJ |
1295 | printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n" |
1296 | "isofs_read_level3_size: inode=%lu\n", | |
1297 | __func__, inode->i_ino); | |
1da177e4 LT |
1298 | goto out; |
1299 | } | |
1300 | ||
410dd3cf | 1301 | static int isofs_read_inode(struct inode *inode, int relocated) |
1da177e4 LT |
1302 | { |
1303 | struct super_block *sb = inode->i_sb; | |
1304 | struct isofs_sb_info *sbi = ISOFS_SB(sb); | |
1305 | unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); | |
1306 | unsigned long block; | |
1307 | int high_sierra = sbi->s_high_sierra; | |
def12ec5 | 1308 | struct buffer_head *bh; |
c3ed85a3 DJ |
1309 | struct iso_directory_record *de; |
1310 | struct iso_directory_record *tmpde = NULL; | |
1da177e4 LT |
1311 | unsigned int de_len; |
1312 | unsigned long offset; | |
1313 | struct iso_inode_info *ei = ISOFS_I(inode); | |
c4386c83 | 1314 | int ret = -EIO; |
1da177e4 LT |
1315 | |
1316 | block = ei->i_iget5_block; | |
1317 | bh = sb_bread(inode->i_sb, block); | |
1318 | if (!bh) | |
1319 | goto out_badread; | |
1320 | ||
1321 | offset = ei->i_iget5_offset; | |
1322 | ||
1323 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
1324 | de_len = *(unsigned char *) de; | |
1325 | ||
1326 | if (offset + de_len > bufsize) { | |
1327 | int frag1 = bufsize - offset; | |
1328 | ||
1329 | tmpde = kmalloc(de_len, GFP_KERNEL); | |
e96e8a1d | 1330 | if (!tmpde) { |
c4386c83 | 1331 | ret = -ENOMEM; |
1da177e4 LT |
1332 | goto fail; |
1333 | } | |
1334 | memcpy(tmpde, bh->b_data + offset, frag1); | |
1335 | brelse(bh); | |
1336 | bh = sb_bread(inode->i_sb, ++block); | |
1337 | if (!bh) | |
1338 | goto out_badread; | |
1339 | memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1); | |
1340 | de = tmpde; | |
1341 | } | |
1342 | ||
1343 | inode->i_ino = isofs_get_ino(ei->i_iget5_block, | |
c3ed85a3 DJ |
1344 | ei->i_iget5_offset, |
1345 | ISOFS_BUFFER_BITS(inode)); | |
1da177e4 LT |
1346 | |
1347 | /* Assume it is a normal-format file unless told otherwise */ | |
1348 | ei->i_file_format = isofs_file_normal; | |
1349 | ||
1350 | if (de->flags[-high_sierra] & 2) { | |
52b680c8 JK |
1351 | if (sbi->s_dmode != ISOFS_INVALID_MODE) |
1352 | inode->i_mode = S_IFDIR | sbi->s_dmode; | |
1353 | else | |
1354 | inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
bfe86848 | 1355 | set_nlink(inode, 1); /* |
c3ed85a3 DJ |
1356 | * Set to 1. We know there are 2, but |
1357 | * the find utility tries to optimize | |
1358 | * if it is 2, and it screws up. It is | |
1359 | * easier to give 1 which tells find to | |
1360 | * do it the hard way. | |
1361 | */ | |
1da177e4 | 1362 | } else { |
52b680c8 JK |
1363 | if (sbi->s_fmode != ISOFS_INVALID_MODE) { |
1364 | inode->i_mode = S_IFREG | sbi->s_fmode; | |
1365 | } else { | |
1366 | /* | |
1367 | * Set default permissions: r-x for all. The disc | |
1368 | * could be shared with DOS machines so virtually | |
1369 | * anything could be a valid executable. | |
1370 | */ | |
1371 | inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO; | |
1372 | } | |
bfe86848 | 1373 | set_nlink(inode, 1); |
1da177e4 LT |
1374 | } |
1375 | inode->i_uid = sbi->s_uid; | |
1376 | inode->i_gid = sbi->s_gid; | |
ba52de12 | 1377 | inode->i_blocks = 0; |
1da177e4 LT |
1378 | |
1379 | ei->i_format_parm[0] = 0; | |
1380 | ei->i_format_parm[1] = 0; | |
1381 | ei->i_format_parm[2] = 0; | |
1382 | ||
c3ed85a3 | 1383 | ei->i_section_size = isonum_733(de->size); |
9eb7f2c6 | 1384 | if (de->flags[-high_sierra] & 0x80) { |
c4386c83 DH |
1385 | ret = isofs_read_level3_size(inode); |
1386 | if (ret < 0) | |
c3ed85a3 | 1387 | goto fail; |
c4386c83 | 1388 | ret = -EIO; |
1da177e4 LT |
1389 | } else { |
1390 | ei->i_next_section_block = 0; | |
1391 | ei->i_next_section_offset = 0; | |
c3ed85a3 | 1392 | inode->i_size = isonum_733(de->size); |
1da177e4 LT |
1393 | } |
1394 | ||
1395 | /* | |
1396 | * Some dipshit decided to store some other bit of information | |
1397 | * in the high byte of the file length. Truncate size in case | |
1398 | * this CDROM was mounted with the cruft option. | |
1399 | */ | |
1400 | ||
5404ac8e | 1401 | if (sbi->s_cruft) |
1da177e4 LT |
1402 | inode->i_size &= 0x00ffffff; |
1403 | ||
1404 | if (de->interleave[0]) { | |
c3ed85a3 | 1405 | printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n"); |
1da177e4 LT |
1406 | inode->i_size = 0; |
1407 | } | |
1408 | ||
1409 | /* I have no idea what file_unit_size is used for, so | |
1410 | we will flag it for now */ | |
1411 | if (de->file_unit_size[0] != 0) { | |
c3ed85a3 DJ |
1412 | printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n", |
1413 | inode->i_ino); | |
1da177e4 LT |
1414 | } |
1415 | ||
1416 | /* I have no idea what other flag bits are used for, so | |
1417 | we will flag it for now */ | |
1418 | #ifdef DEBUG | |
1419 | if((de->flags[-high_sierra] & ~2)!= 0){ | |
c3ed85a3 DJ |
1420 | printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file " |
1421 | "(%ld %x).\n", | |
1422 | inode->i_ino, de->flags[-high_sierra]); | |
1da177e4 LT |
1423 | } |
1424 | #endif | |
1425 | ||
1426 | inode->i_mtime.tv_sec = | |
1427 | inode->i_atime.tv_sec = | |
1428 | inode->i_ctime.tv_sec = iso_date(de->date, high_sierra); | |
1429 | inode->i_mtime.tv_nsec = | |
1430 | inode->i_atime.tv_nsec = | |
1431 | inode->i_ctime.tv_nsec = 0; | |
1432 | ||
c3ed85a3 DJ |
1433 | ei->i_first_extent = (isonum_733(de->extent) + |
1434 | isonum_711(de->ext_attr_length)); | |
1da177e4 LT |
1435 | |
1436 | /* Set the number of blocks for stat() - should be done before RR */ | |
c3ed85a3 | 1437 | inode->i_blocks = (inode->i_size + 511) >> 9; |
1da177e4 LT |
1438 | |
1439 | /* | |
1440 | * Now test for possible Rock Ridge extensions which will override | |
1441 | * some of these numbers in the inode structure. | |
1442 | */ | |
1443 | ||
1444 | if (!high_sierra) { | |
410dd3cf | 1445 | parse_rock_ridge_inode(de, inode, relocated); |
1da177e4 | 1446 | /* if we want uid/gid set, override the rock ridge setting */ |
5c4a656b JK |
1447 | if (sbi->s_uid_set) |
1448 | inode->i_uid = sbi->s_uid; | |
1449 | if (sbi->s_gid_set) | |
1450 | inode->i_gid = sbi->s_gid; | |
1da177e4 | 1451 | } |
52b680c8 JK |
1452 | /* Now set final access rights if overriding rock ridge setting */ |
1453 | if (S_ISDIR(inode->i_mode) && sbi->s_overriderockperm && | |
1454 | sbi->s_dmode != ISOFS_INVALID_MODE) | |
1455 | inode->i_mode = S_IFDIR | sbi->s_dmode; | |
1456 | if (S_ISREG(inode->i_mode) && sbi->s_overriderockperm && | |
1457 | sbi->s_fmode != ISOFS_INVALID_MODE) | |
1458 | inode->i_mode = S_IFREG | sbi->s_fmode; | |
1da177e4 LT |
1459 | |
1460 | /* Install the inode operations vector */ | |
1461 | if (S_ISREG(inode->i_mode)) { | |
1462 | inode->i_fop = &generic_ro_fops; | |
c3ed85a3 | 1463 | switch (ei->i_file_format) { |
1da177e4 LT |
1464 | #ifdef CONFIG_ZISOFS |
1465 | case isofs_file_compressed: | |
1466 | inode->i_data.a_ops = &zisofs_aops; | |
1467 | break; | |
1468 | #endif | |
1469 | default: | |
1470 | inode->i_data.a_ops = &isofs_aops; | |
1471 | break; | |
1472 | } | |
1473 | } else if (S_ISDIR(inode->i_mode)) { | |
1474 | inode->i_op = &isofs_dir_inode_operations; | |
1475 | inode->i_fop = &isofs_dir_operations; | |
1476 | } else if (S_ISLNK(inode->i_mode)) { | |
1477 | inode->i_op = &page_symlink_inode_operations; | |
21fc61c7 | 1478 | inode_nohighmem(inode); |
1da177e4 LT |
1479 | inode->i_data.a_ops = &isofs_symlink_aops; |
1480 | } else | |
1481 | /* XXX - parse_rock_ridge_inode() had already set i_rdev. */ | |
1482 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1483 | ||
c4386c83 | 1484 | ret = 0; |
9eb7f2c6 | 1485 | out: |
f99d49ad | 1486 | kfree(tmpde); |
1da177e4 LT |
1487 | if (bh) |
1488 | brelse(bh); | |
c4386c83 | 1489 | return ret; |
1da177e4 | 1490 | |
9eb7f2c6 | 1491 | out_badread: |
1da177e4 | 1492 | printk(KERN_WARNING "ISOFS: unable to read i-node block\n"); |
9eb7f2c6 | 1493 | fail: |
1da177e4 LT |
1494 | goto out; |
1495 | } | |
1496 | ||
1497 | struct isofs_iget5_callback_data { | |
1498 | unsigned long block; | |
1499 | unsigned long offset; | |
1500 | }; | |
1501 | ||
1502 | static int isofs_iget5_test(struct inode *ino, void *data) | |
1503 | { | |
1504 | struct iso_inode_info *i = ISOFS_I(ino); | |
1505 | struct isofs_iget5_callback_data *d = | |
1506 | (struct isofs_iget5_callback_data*)data; | |
1507 | return (i->i_iget5_block == d->block) | |
c3ed85a3 | 1508 | && (i->i_iget5_offset == d->offset); |
1da177e4 LT |
1509 | } |
1510 | ||
1511 | static int isofs_iget5_set(struct inode *ino, void *data) | |
1512 | { | |
1513 | struct iso_inode_info *i = ISOFS_I(ino); | |
1514 | struct isofs_iget5_callback_data *d = | |
1515 | (struct isofs_iget5_callback_data*)data; | |
1516 | i->i_iget5_block = d->block; | |
1517 | i->i_iget5_offset = d->offset; | |
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | /* Store, in the inode's containing structure, the block and block | |
1522 | * offset that point to the underlying meta-data for the inode. The | |
1523 | * code below is otherwise similar to the iget() code in | |
1524 | * include/linux/fs.h */ | |
410dd3cf JK |
1525 | struct inode *__isofs_iget(struct super_block *sb, |
1526 | unsigned long block, | |
1527 | unsigned long offset, | |
1528 | int relocated) | |
1da177e4 LT |
1529 | { |
1530 | unsigned long hashval; | |
1531 | struct inode *inode; | |
1532 | struct isofs_iget5_callback_data data; | |
c4386c83 | 1533 | long ret; |
1da177e4 LT |
1534 | |
1535 | if (offset >= 1ul << sb->s_blocksize_bits) | |
c4386c83 | 1536 | return ERR_PTR(-EINVAL); |
1da177e4 LT |
1537 | |
1538 | data.block = block; | |
1539 | data.offset = offset; | |
1540 | ||
1541 | hashval = (block << sb->s_blocksize_bits) | offset; | |
1542 | ||
9eb7f2c6 | 1543 | inode = iget5_locked(sb, hashval, &isofs_iget5_test, |
c3ed85a3 | 1544 | &isofs_iget5_set, &data); |
1da177e4 | 1545 | |
c4386c83 DH |
1546 | if (!inode) |
1547 | return ERR_PTR(-ENOMEM); | |
1548 | ||
1549 | if (inode->i_state & I_NEW) { | |
410dd3cf | 1550 | ret = isofs_read_inode(inode, relocated); |
c4386c83 DH |
1551 | if (ret < 0) { |
1552 | iget_failed(inode); | |
1553 | inode = ERR_PTR(ret); | |
1554 | } else { | |
1555 | unlock_new_inode(inode); | |
1556 | } | |
1da177e4 LT |
1557 | } |
1558 | ||
1559 | return inode; | |
1560 | } | |
1561 | ||
152a0836 AV |
1562 | static struct dentry *isofs_mount(struct file_system_type *fs_type, |
1563 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1564 | { |
152a0836 | 1565 | return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super); |
1da177e4 LT |
1566 | } |
1567 | ||
1568 | static struct file_system_type iso9660_fs_type = { | |
1569 | .owner = THIS_MODULE, | |
1570 | .name = "iso9660", | |
152a0836 | 1571 | .mount = isofs_mount, |
1da177e4 LT |
1572 | .kill_sb = kill_block_super, |
1573 | .fs_flags = FS_REQUIRES_DEV, | |
1574 | }; | |
7f78e035 | 1575 | MODULE_ALIAS_FS("iso9660"); |
fa7614dd | 1576 | MODULE_ALIAS("iso9660"); |
1da177e4 LT |
1577 | |
1578 | static int __init init_iso9660_fs(void) | |
1579 | { | |
1580 | int err = init_inodecache(); | |
1581 | if (err) | |
1582 | goto out; | |
1583 | #ifdef CONFIG_ZISOFS | |
1584 | err = zisofs_init(); | |
1585 | if (err) | |
1586 | goto out1; | |
1587 | #endif | |
1588 | err = register_filesystem(&iso9660_fs_type); | |
1589 | if (err) | |
1590 | goto out2; | |
1591 | return 0; | |
1592 | out2: | |
1593 | #ifdef CONFIG_ZISOFS | |
1594 | zisofs_cleanup(); | |
1595 | out1: | |
1596 | #endif | |
1597 | destroy_inodecache(); | |
1598 | out: | |
1599 | return err; | |
1600 | } | |
1601 | ||
1602 | static void __exit exit_iso9660_fs(void) | |
1603 | { | |
1604 | unregister_filesystem(&iso9660_fs_type); | |
1605 | #ifdef CONFIG_ZISOFS | |
1606 | zisofs_cleanup(); | |
1607 | #endif | |
1608 | destroy_inodecache(); | |
1609 | } | |
1610 | ||
1611 | module_init(init_iso9660_fs) | |
1612 | module_exit(exit_iso9660_fs) | |
1613 | MODULE_LICENSE("GPL"); |