Commit | Line | Data |
---|---|---|
1da177e4 LT |
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. | |
96de0e25 | 6 | * 1994 Eberhard Mönkeberg - multi session handling. |
1da177e4 LT |
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 | ||
94f2f715 | 14 | #include <linux/init.h> |
1da177e4 LT |
15 | #include <linux/module.h> |
16 | ||
1da177e4 | 17 | #include <linux/slab.h> |
5b825c3a | 18 | #include <linux/cred.h> |
1da177e4 LT |
19 | #include <linux/nls.h> |
20 | #include <linux/ctype.h> | |
94f2f715 AV |
21 | #include <linux/statfs.h> |
22 | #include <linux/cdrom.h> | |
1da177e4 | 23 | #include <linux/parser.h> |
3069083c | 24 | #include <linux/mpage.h> |
ba64e2b9 | 25 | #include <linux/user_namespace.h> |
86a1da6d | 26 | #include <linux/seq_file.h> |
1da177e4 | 27 | |
94f2f715 | 28 | #include "isofs.h" |
1da177e4 LT |
29 | #include "zisofs.h" |
30 | ||
31 | #define BEQUIET | |
32 | ||
da53be12 | 33 | static int isofs_hashi(const struct dentry *parent, struct qstr *qstr); |
6fa67e70 | 34 | static int isofs_dentry_cmpi(const struct dentry *dentry, |
621e155a | 35 | unsigned int len, const char *str, const struct qstr *name); |
1da177e4 LT |
36 | |
37 | #ifdef CONFIG_JOLIET | |
da53be12 LT |
38 | static int isofs_hashi_ms(const struct dentry *parent, struct qstr *qstr); |
39 | static int isofs_hash_ms(const struct dentry *parent, struct qstr *qstr); | |
6fa67e70 | 40 | static int isofs_dentry_cmpi_ms(const struct dentry *dentry, |
621e155a | 41 | unsigned int len, const char *str, const struct qstr *name); |
6fa67e70 | 42 | static int isofs_dentry_cmp_ms(const struct dentry *dentry, |
621e155a | 43 | unsigned int len, const char *str, const struct qstr *name); |
1da177e4 LT |
44 | #endif |
45 | ||
46 | static void isofs_put_super(struct super_block *sb) | |
47 | { | |
48 | struct isofs_sb_info *sbi = ISOFS_SB(sb); | |
6cfd0148 | 49 | |
1da177e4 | 50 | #ifdef CONFIG_JOLIET |
6d729e44 | 51 | unload_nls(sbi->s_nls_iocharset); |
1da177e4 LT |
52 | #endif |
53 | ||
1da177e4 LT |
54 | kfree(sbi); |
55 | sb->s_fs_info = NULL; | |
56 | return; | |
57 | } | |
58 | ||
410dd3cf | 59 | static int isofs_read_inode(struct inode *, int relocated); |
726c3342 | 60 | static int isofs_statfs (struct dentry *, struct kstatfs *); |
86a1da6d | 61 | static int isofs_show_options(struct seq_file *, struct dentry *); |
1da177e4 | 62 | |
e18b890b | 63 | static struct kmem_cache *isofs_inode_cachep; |
1da177e4 LT |
64 | |
65 | static struct inode *isofs_alloc_inode(struct super_block *sb) | |
66 | { | |
67 | struct iso_inode_info *ei; | |
e94b1766 | 68 | ei = kmem_cache_alloc(isofs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
69 | if (!ei) |
70 | return NULL; | |
71 | return &ei->vfs_inode; | |
72 | } | |
73 | ||
fa0d7e3d | 74 | static void isofs_i_callback(struct rcu_head *head) |
1da177e4 | 75 | { |
fa0d7e3d | 76 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
77 | kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode)); |
78 | } | |
79 | ||
fa0d7e3d NP |
80 | static void isofs_destroy_inode(struct inode *inode) |
81 | { | |
82 | call_rcu(&inode->i_rcu, isofs_i_callback); | |
83 | } | |
84 | ||
51cc5068 | 85 | static void init_once(void *foo) |
1da177e4 | 86 | { |
9eb7f2c6 | 87 | struct iso_inode_info *ei = foo; |
1da177e4 | 88 | |
a35afb83 | 89 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 90 | } |
c3ed85a3 | 91 | |
b3b749b7 | 92 | static int __init init_inodecache(void) |
1da177e4 LT |
93 | { |
94 | isofs_inode_cachep = kmem_cache_create("isofs_inode_cache", | |
c3ed85a3 DJ |
95 | sizeof(struct iso_inode_info), |
96 | 0, (SLAB_RECLAIM_ACCOUNT| | |
5d097056 | 97 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 98 | init_once); |
e96e8a1d | 99 | if (!isofs_inode_cachep) |
1da177e4 LT |
100 | return -ENOMEM; |
101 | return 0; | |
102 | } | |
103 | ||
104 | static void destroy_inodecache(void) | |
105 | { | |
8c0a8537 KS |
106 | /* |
107 | * Make sure all delayed rcu free inodes are flushed before we | |
108 | * destroy cache. | |
109 | */ | |
110 | rcu_barrier(); | |
1a1d92c1 | 111 | kmem_cache_destroy(isofs_inode_cachep); |
1da177e4 LT |
112 | } |
113 | ||
114 | static int isofs_remount(struct super_block *sb, int *flags, char *data) | |
115 | { | |
02b9984d | 116 | sync_filesystem(sb); |
1751e8a6 | 117 | if (!(*flags & SB_RDONLY)) |
17b7f7cf | 118 | return -EROFS; |
1da177e4 LT |
119 | return 0; |
120 | } | |
121 | ||
ee9b6d61 | 122 | static const struct super_operations isofs_sops = { |
1da177e4 LT |
123 | .alloc_inode = isofs_alloc_inode, |
124 | .destroy_inode = isofs_destroy_inode, | |
1da177e4 LT |
125 | .put_super = isofs_put_super, |
126 | .statfs = isofs_statfs, | |
127 | .remount_fs = isofs_remount, | |
86a1da6d | 128 | .show_options = isofs_show_options, |
1da177e4 LT |
129 | }; |
130 | ||
131 | ||
e16404ed | 132 | static const struct dentry_operations isofs_dentry_ops[] = { |
1da177e4 LT |
133 | { |
134 | .d_hash = isofs_hashi, | |
135 | .d_compare = isofs_dentry_cmpi, | |
136 | }, | |
137 | #ifdef CONFIG_JOLIET | |
138 | { | |
139 | .d_hash = isofs_hash_ms, | |
140 | .d_compare = isofs_dentry_cmp_ms, | |
141 | }, | |
142 | { | |
143 | .d_hash = isofs_hashi_ms, | |
144 | .d_compare = isofs_dentry_cmpi_ms, | |
9eb7f2c6 | 145 | }, |
1da177e4 LT |
146 | #endif |
147 | }; | |
148 | ||
149 | struct iso9660_options{ | |
5404ac8e | 150 | unsigned int rock:1; |
8711c67b | 151 | unsigned int joliet:1; |
5404ac8e JK |
152 | unsigned int cruft:1; |
153 | unsigned int hide:1; | |
154 | unsigned int showassoc:1; | |
155 | unsigned int nocompress:1; | |
156 | unsigned int overriderockperm:1; | |
157 | unsigned int uid_set:1; | |
158 | unsigned int gid_set:1; | |
159 | unsigned int utf8:1; | |
160 | unsigned char map; | |
1da177e4 LT |
161 | unsigned char check; |
162 | unsigned int blocksize; | |
7328bdd6 AV |
163 | umode_t fmode; |
164 | umode_t dmode; | |
ba64e2b9 EB |
165 | kgid_t gid; |
166 | kuid_t uid; | |
1da177e4 | 167 | char *iocharset; |
c3ed85a3 DJ |
168 | /* LVE */ |
169 | s32 session; | |
170 | s32 sbsector; | |
1da177e4 LT |
171 | }; |
172 | ||
1da177e4 LT |
173 | /* |
174 | * Compute the hash for the isofs name corresponding to the dentry. | |
175 | */ | |
176 | static int | |
8387ff25 | 177 | isofs_hashi_common(const struct dentry *dentry, struct qstr *qstr, int ms) |
1da177e4 LT |
178 | { |
179 | const char *name; | |
180 | int len; | |
181 | char c; | |
182 | unsigned long hash; | |
183 | ||
184 | len = qstr->len; | |
185 | name = qstr->name; | |
186 | if (ms) { | |
187 | while (len && name[len-1] == '.') | |
188 | len--; | |
189 | } | |
190 | ||
8387ff25 | 191 | hash = init_name_hash(dentry); |
1da177e4 LT |
192 | while (len--) { |
193 | c = tolower(*name++); | |
f17e121f | 194 | hash = partial_name_hash(c, hash); |
1da177e4 LT |
195 | } |
196 | qstr->hash = end_name_hash(hash); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | /* | |
621e155a | 202 | * Compare of two isofs names. |
1da177e4 | 203 | */ |
621e155a NP |
204 | static int isofs_dentry_cmp_common( |
205 | unsigned int len, const char *str, | |
206 | const struct qstr *name, int ms, int ci) | |
1da177e4 LT |
207 | { |
208 | int alen, blen; | |
209 | ||
210 | /* A filename cannot end in '.' or we treat it like it has none */ | |
621e155a NP |
211 | alen = name->len; |
212 | blen = len; | |
1da177e4 | 213 | if (ms) { |
621e155a | 214 | while (alen && name->name[alen-1] == '.') |
1da177e4 | 215 | alen--; |
621e155a | 216 | while (blen && str[blen-1] == '.') |
1da177e4 LT |
217 | blen--; |
218 | } | |
219 | if (alen == blen) { | |
621e155a | 220 | if (ci) { |
a97df427 | 221 | if (strncasecmp(name->name, str, alen) == 0) |
621e155a NP |
222 | return 0; |
223 | } else { | |
224 | if (strncmp(name->name, str, alen) == 0) | |
225 | return 0; | |
226 | } | |
1da177e4 LT |
227 | } |
228 | return 1; | |
229 | } | |
230 | ||
1da177e4 | 231 | static int |
da53be12 | 232 | isofs_hashi(const struct dentry *dentry, struct qstr *qstr) |
1da177e4 | 233 | { |
8387ff25 | 234 | return isofs_hashi_common(dentry, qstr, 0); |
1da177e4 LT |
235 | } |
236 | ||
1da177e4 | 237 | static int |
6fa67e70 | 238 | isofs_dentry_cmpi(const struct dentry *dentry, |
621e155a | 239 | unsigned int len, const char *str, const struct qstr *name) |
1da177e4 | 240 | { |
621e155a | 241 | return isofs_dentry_cmp_common(len, str, name, 0, 1); |
1da177e4 LT |
242 | } |
243 | ||
244 | #ifdef CONFIG_JOLIET | |
7ca2f234 AB |
245 | /* |
246 | * Compute the hash for the isofs name corresponding to the dentry. | |
247 | */ | |
248 | static int | |
8387ff25 | 249 | isofs_hash_common(const struct dentry *dentry, struct qstr *qstr, int ms) |
7ca2f234 AB |
250 | { |
251 | const char *name; | |
252 | int len; | |
253 | ||
254 | len = qstr->len; | |
255 | name = qstr->name; | |
256 | if (ms) { | |
257 | while (len && name[len-1] == '.') | |
258 | len--; | |
259 | } | |
260 | ||
8387ff25 | 261 | qstr->hash = full_name_hash(dentry, name, len); |
7ca2f234 AB |
262 | |
263 | return 0; | |
264 | } | |
265 | ||
1da177e4 | 266 | static int |
da53be12 | 267 | isofs_hash_ms(const struct dentry *dentry, struct qstr *qstr) |
1da177e4 | 268 | { |
8387ff25 | 269 | return isofs_hash_common(dentry, qstr, 1); |
1da177e4 LT |
270 | } |
271 | ||
272 | static int | |
da53be12 | 273 | isofs_hashi_ms(const struct dentry *dentry, struct qstr *qstr) |
1da177e4 | 274 | { |
8387ff25 | 275 | return isofs_hashi_common(dentry, qstr, 1); |
1da177e4 LT |
276 | } |
277 | ||
278 | static int | |
6fa67e70 | 279 | isofs_dentry_cmp_ms(const struct dentry *dentry, |
621e155a | 280 | unsigned int len, const char *str, const struct qstr *name) |
1da177e4 | 281 | { |
621e155a | 282 | return isofs_dentry_cmp_common(len, str, name, 1, 0); |
1da177e4 LT |
283 | } |
284 | ||
285 | static int | |
6fa67e70 | 286 | isofs_dentry_cmpi_ms(const struct dentry *dentry, |
621e155a | 287 | unsigned int len, const char *str, const struct qstr *name) |
1da177e4 | 288 | { |
621e155a | 289 | return isofs_dentry_cmp_common(len, str, name, 1, 1); |
1da177e4 LT |
290 | } |
291 | #endif | |
292 | ||
293 | enum { | |
294 | Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore, | |
295 | Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet, | |
296 | Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err, | |
52b680c8 | 297 | Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode, Opt_overriderockperm, |
1da177e4 LT |
298 | }; |
299 | ||
a447c093 | 300 | static const match_table_t tokens = { |
1da177e4 LT |
301 | {Opt_norock, "norock"}, |
302 | {Opt_nojoliet, "nojoliet"}, | |
303 | {Opt_unhide, "unhide"}, | |
9769f4eb JW |
304 | {Opt_hide, "hide"}, |
305 | {Opt_showassoc, "showassoc"}, | |
1da177e4 LT |
306 | {Opt_cruft, "cruft"}, |
307 | {Opt_utf8, "utf8"}, | |
308 | {Opt_iocharset, "iocharset=%s"}, | |
309 | {Opt_map_a, "map=acorn"}, | |
310 | {Opt_map_a, "map=a"}, | |
311 | {Opt_map_n, "map=normal"}, | |
312 | {Opt_map_n, "map=n"}, | |
313 | {Opt_map_o, "map=off"}, | |
314 | {Opt_map_o, "map=o"}, | |
315 | {Opt_session, "session=%u"}, | |
316 | {Opt_sb, "sbsector=%u"}, | |
317 | {Opt_check_r, "check=relaxed"}, | |
318 | {Opt_check_r, "check=r"}, | |
319 | {Opt_check_s, "check=strict"}, | |
320 | {Opt_check_s, "check=s"}, | |
321 | {Opt_uid, "uid=%u"}, | |
322 | {Opt_gid, "gid=%u"}, | |
323 | {Opt_mode, "mode=%u"}, | |
9b7880e7 | 324 | {Opt_dmode, "dmode=%u"}, |
52b680c8 | 325 | {Opt_overriderockperm, "overriderockperm"}, |
1da177e4 LT |
326 | {Opt_block, "block=%u"}, |
327 | {Opt_ignore, "conv=binary"}, | |
328 | {Opt_ignore, "conv=b"}, | |
329 | {Opt_ignore, "conv=text"}, | |
330 | {Opt_ignore, "conv=t"}, | |
331 | {Opt_ignore, "conv=mtext"}, | |
332 | {Opt_ignore, "conv=m"}, | |
333 | {Opt_ignore, "conv=auto"}, | |
334 | {Opt_ignore, "conv=a"}, | |
335 | {Opt_nocompress, "nocompress"}, | |
336 | {Opt_err, NULL} | |
337 | }; | |
338 | ||
9eb7f2c6 | 339 | static int parse_options(char *options, struct iso9660_options *popt) |
1da177e4 LT |
340 | { |
341 | char *p; | |
342 | int option; | |
343 | ||
344 | popt->map = 'n'; | |
5404ac8e JK |
345 | popt->rock = 1; |
346 | popt->joliet = 1; | |
347 | popt->cruft = 0; | |
348 | popt->hide = 0; | |
349 | popt->showassoc = 0; | |
1da177e4 LT |
350 | popt->check = 'u'; /* unset */ |
351 | popt->nocompress = 0; | |
352 | popt->blocksize = 1024; | |
52b680c8 | 353 | popt->fmode = popt->dmode = ISOFS_INVALID_MODE; |
5c4a656b JK |
354 | popt->uid_set = 0; |
355 | popt->gid_set = 0; | |
ba64e2b9 EB |
356 | popt->gid = GLOBAL_ROOT_GID; |
357 | popt->uid = GLOBAL_ROOT_UID; | |
1da177e4 LT |
358 | popt->iocharset = NULL; |
359 | popt->utf8 = 0; | |
52b680c8 | 360 | popt->overriderockperm = 0; |
1da177e4 LT |
361 | popt->session=-1; |
362 | popt->sbsector=-1; | |
363 | if (!options) | |
364 | return 1; | |
365 | ||
366 | while ((p = strsep(&options, ",")) != NULL) { | |
367 | int token; | |
368 | substring_t args[MAX_OPT_ARGS]; | |
369 | unsigned n; | |
370 | ||
371 | if (!*p) | |
372 | continue; | |
373 | ||
374 | token = match_token(p, tokens, args); | |
375 | switch (token) { | |
376 | case Opt_norock: | |
5404ac8e | 377 | popt->rock = 0; |
1da177e4 LT |
378 | break; |
379 | case Opt_nojoliet: | |
5404ac8e | 380 | popt->joliet = 0; |
1da177e4 | 381 | break; |
9769f4eb | 382 | case Opt_hide: |
5404ac8e | 383 | popt->hide = 1; |
9769f4eb | 384 | break; |
1da177e4 | 385 | case Opt_unhide: |
9769f4eb | 386 | case Opt_showassoc: |
5404ac8e | 387 | popt->showassoc = 1; |
1da177e4 LT |
388 | break; |
389 | case Opt_cruft: | |
5404ac8e | 390 | popt->cruft = 1; |
1da177e4 LT |
391 | break; |
392 | case Opt_utf8: | |
393 | popt->utf8 = 1; | |
394 | break; | |
395 | #ifdef CONFIG_JOLIET | |
396 | case Opt_iocharset: | |
397 | popt->iocharset = match_strdup(&args[0]); | |
398 | break; | |
399 | #endif | |
400 | case Opt_map_a: | |
401 | popt->map = 'a'; | |
402 | break; | |
403 | case Opt_map_o: | |
404 | popt->map = 'o'; | |
405 | break; | |
406 | case Opt_map_n: | |
407 | popt->map = 'n'; | |
408 | break; | |
409 | case Opt_session: | |
410 | if (match_int(&args[0], &option)) | |
411 | return 0; | |
412 | n = option; | |
34363c05 JK |
413 | /* |
414 | * Track numbers are supposed to be in range 1-99, the | |
415 | * mount option starts indexing at 0. | |
416 | */ | |
417 | if (n >= 99) | |
1da177e4 LT |
418 | return 0; |
419 | popt->session = n + 1; | |
420 | break; | |
421 | case Opt_sb: | |
422 | if (match_int(&args[0], &option)) | |
423 | return 0; | |
424 | popt->sbsector = option; | |
425 | break; | |
426 | case Opt_check_r: | |
427 | popt->check = 'r'; | |
428 | break; | |
429 | case Opt_check_s: | |
430 | popt->check = 's'; | |
431 | break; | |
432 | case Opt_ignore: | |
433 | break; | |
434 | case Opt_uid: | |
435 | if (match_int(&args[0], &option)) | |
436 | return 0; | |
ba64e2b9 EB |
437 | popt->uid = make_kuid(current_user_ns(), option); |
438 | if (!uid_valid(popt->uid)) | |
439 | return 0; | |
5c4a656b | 440 | popt->uid_set = 1; |
1da177e4 LT |
441 | break; |
442 | case Opt_gid: | |
443 | if (match_int(&args[0], &option)) | |
444 | return 0; | |
ba64e2b9 EB |
445 | popt->gid = make_kgid(current_user_ns(), option); |
446 | if (!gid_valid(popt->gid)) | |
447 | return 0; | |
5c4a656b | 448 | popt->gid_set = 1; |
1da177e4 LT |
449 | break; |
450 | case Opt_mode: | |
451 | if (match_int(&args[0], &option)) | |
452 | return 0; | |
9b7880e7 JK |
453 | popt->fmode = option; |
454 | break; | |
455 | case Opt_dmode: | |
456 | if (match_int(&args[0], &option)) | |
457 | return 0; | |
458 | popt->dmode = option; | |
1da177e4 | 459 | break; |
52b680c8 JK |
460 | case Opt_overriderockperm: |
461 | popt->overriderockperm = 1; | |
462 | break; | |
1da177e4 LT |
463 | case Opt_block: |
464 | if (match_int(&args[0], &option)) | |
465 | return 0; | |
466 | n = option; | |
467 | if (n != 512 && n != 1024 && n != 2048) | |
468 | return 0; | |
469 | popt->blocksize = n; | |
470 | break; | |
471 | case Opt_nocompress: | |
472 | popt->nocompress = 1; | |
473 | break; | |
474 | default: | |
475 | return 0; | |
476 | } | |
477 | } | |
478 | return 1; | |
479 | } | |
480 | ||
86a1da6d DH |
481 | /* |
482 | * Display the mount options in /proc/mounts. | |
483 | */ | |
484 | static int isofs_show_options(struct seq_file *m, struct dentry *root) | |
485 | { | |
486 | struct isofs_sb_info *sbi = ISOFS_SB(root->d_sb); | |
487 | ||
488 | if (!sbi->s_rock) seq_puts(m, ",norock"); | |
489 | else if (!sbi->s_joliet_level) seq_puts(m, ",nojoliet"); | |
490 | if (sbi->s_cruft) seq_puts(m, ",cruft"); | |
491 | if (sbi->s_hide) seq_puts(m, ",hide"); | |
492 | if (sbi->s_nocompress) seq_puts(m, ",nocompress"); | |
493 | if (sbi->s_overriderockperm) seq_puts(m, ",overriderockperm"); | |
494 | if (sbi->s_showassoc) seq_puts(m, ",showassoc"); | |
495 | if (sbi->s_utf8) seq_puts(m, ",utf8"); | |
496 | ||
497 | if (sbi->s_check) seq_printf(m, ",check=%c", sbi->s_check); | |
498 | if (sbi->s_mapping) seq_printf(m, ",map=%c", sbi->s_mapping); | |
fdb254db | 499 | if (sbi->s_session != 255) seq_printf(m, ",session=%u", sbi->s_session - 1); |
86a1da6d DH |
500 | if (sbi->s_sbsector != -1) seq_printf(m, ",sbsector=%u", sbi->s_sbsector); |
501 | ||
502 | if (root->d_sb->s_blocksize != 1024) | |
503 | seq_printf(m, ",blocksize=%lu", root->d_sb->s_blocksize); | |
504 | ||
505 | if (sbi->s_uid_set) | |
506 | seq_printf(m, ",uid=%u", | |
507 | from_kuid_munged(&init_user_ns, sbi->s_uid)); | |
508 | if (sbi->s_gid_set) | |
509 | seq_printf(m, ",gid=%u", | |
510 | from_kgid_munged(&init_user_ns, sbi->s_gid)); | |
511 | ||
512 | if (sbi->s_dmode != ISOFS_INVALID_MODE) | |
513 | seq_printf(m, ",dmode=%o", sbi->s_dmode); | |
514 | if (sbi->s_fmode != ISOFS_INVALID_MODE) | |
515 | seq_printf(m, ",fmode=%o", sbi->s_fmode); | |
516 | ||
0ab0b271 | 517 | #ifdef CONFIG_JOLIET |
86a1da6d DH |
518 | if (sbi->s_nls_iocharset && |
519 | strcmp(sbi->s_nls_iocharset->charset, CONFIG_NLS_DEFAULT) != 0) | |
520 | seq_printf(m, ",iocharset=%s", sbi->s_nls_iocharset->charset); | |
0ab0b271 | 521 | #endif |
86a1da6d DH |
522 | return 0; |
523 | } | |
524 | ||
1da177e4 LT |
525 | /* |
526 | * look if the driver can tell the multi session redirection value | |
527 | * | |
528 | * don't change this if you don't know what you do, please! | |
529 | * Multisession is legal only with XA disks. | |
530 | * A non-XA disk with more than one volume descriptor may do it right, but | |
531 | * usually is written in a nowhere standardized "multi-partition" manner. | |
532 | * Multisession uses absolute addressing (solely the first frame of the whole | |
533 | * track is #0), multi-partition uses relative addressing (each first frame of | |
534 | * each track is #0), and a track is not a session. | |
535 | * | |
536 | * A broken CDwriter software or drive firmware does not set new standards, | |
537 | * at least not if conflicting with the existing ones. | |
538 | * | |
539 | * emoenke@gwdg.de | |
540 | */ | |
541 | #define WE_OBEY_THE_WRITTEN_STANDARDS 1 | |
542 | ||
9eb7f2c6 | 543 | static unsigned int isofs_get_last_session(struct super_block *sb, s32 session) |
1da177e4 LT |
544 | { |
545 | struct cdrom_multisession ms_info; | |
546 | unsigned int vol_desc_start; | |
547 | struct block_device *bdev = sb->s_bdev; | |
548 | int i; | |
549 | ||
550 | vol_desc_start=0; | |
551 | ms_info.addr_format=CDROM_LBA; | |
34363c05 | 552 | if (session > 0) { |
1da177e4 LT |
553 | struct cdrom_tocentry Te; |
554 | Te.cdte_track=session; | |
555 | Te.cdte_format=CDROM_LBA; | |
556 | i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te); | |
557 | if (!i) { | |
c3ed85a3 DJ |
558 | printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n", |
559 | session, Te.cdte_addr.lba, | |
560 | Te.cdte_ctrl&CDROM_DATA_TRACK); | |
1da177e4 LT |
561 | if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4) |
562 | return Te.cdte_addr.lba; | |
563 | } | |
c3ed85a3 DJ |
564 | |
565 | printk(KERN_ERR "ISOFS: Invalid session number or type of track\n"); | |
1da177e4 LT |
566 | } |
567 | i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info); | |
9eb7f2c6 | 568 | if (session > 0) |
c3ed85a3 | 569 | printk(KERN_ERR "ISOFS: Invalid session number\n"); |
1da177e4 | 570 | #if 0 |
c3ed85a3 | 571 | printk(KERN_DEBUG "isofs.inode: CDROMMULTISESSION: rc=%d\n",i); |
1da177e4 | 572 | if (i==0) { |
c3ed85a3 DJ |
573 | printk(KERN_DEBUG "isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no"); |
574 | printk(KERN_DEBUG "isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba); | |
1da177e4 LT |
575 | } |
576 | #endif | |
577 | if (i==0) | |
578 | #if WE_OBEY_THE_WRITTEN_STANDARDS | |
c3ed85a3 | 579 | if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */ |
1da177e4 | 580 | #endif |
c3ed85a3 | 581 | vol_desc_start=ms_info.addr.lba; |
1da177e4 LT |
582 | return vol_desc_start; |
583 | } | |
584 | ||
e45c9eff OZ |
585 | /* |
586 | * Check if root directory is empty (has less than 3 files). | |
587 | * | |
588 | * Used to detect broken CDs where ISO root directory is empty but Joliet root | |
589 | * directory is OK. If such CD has Rock Ridge extensions, they will be disabled | |
590 | * (and Joliet used instead) or else no files would be visible. | |
591 | */ | |
592 | static bool rootdir_empty(struct super_block *sb, unsigned long block) | |
593 | { | |
594 | int offset = 0, files = 0, de_len; | |
595 | struct iso_directory_record *de; | |
596 | struct buffer_head *bh; | |
597 | ||
598 | bh = sb_bread(sb, block); | |
599 | if (!bh) | |
600 | return true; | |
601 | while (files < 3) { | |
602 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
603 | de_len = *(unsigned char *) de; | |
604 | if (de_len == 0) | |
605 | break; | |
606 | files++; | |
607 | offset += de_len; | |
608 | } | |
609 | brelse(bh); | |
610 | return files < 3; | |
611 | } | |
612 | ||
1da177e4 LT |
613 | /* |
614 | * Initialize the superblock and read the root inode. | |
615 | * | |
616 | * Note: a check_disk_change() has been done immediately prior | |
617 | * to this call, so we don't need to check again. | |
618 | */ | |
619 | static int isofs_fill_super(struct super_block *s, void *data, int silent) | |
620 | { | |
c3ed85a3 DJ |
621 | struct buffer_head *bh = NULL, *pri_bh = NULL; |
622 | struct hs_primary_descriptor *h_pri = NULL; | |
623 | struct iso_primary_descriptor *pri = NULL; | |
1da177e4 | 624 | struct iso_supplementary_descriptor *sec = NULL; |
c3ed85a3 DJ |
625 | struct iso_directory_record *rootp; |
626 | struct inode *inode; | |
627 | struct iso9660_options opt; | |
628 | struct isofs_sb_info *sbi; | |
629 | unsigned long first_data_zone; | |
630 | int joliet_level = 0; | |
631 | int iso_blknum, block; | |
632 | int orig_zonesize; | |
c4386c83 | 633 | int table, error = -EINVAL; |
c3ed85a3 | 634 | unsigned int vol_desc_start; |
1da177e4 | 635 | |
f8314dc6 | 636 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
4f819a78 | 637 | if (!sbi) |
1da177e4 LT |
638 | return -ENOMEM; |
639 | s->s_fs_info = sbi; | |
1da177e4 | 640 | |
9eb7f2c6 | 641 | if (!parse_options((char *)data, &opt)) |
1da177e4 LT |
642 | goto out_freesbi; |
643 | ||
644 | /* | |
645 | * First of all, get the hardware blocksize for this device. | |
646 | * If we don't know what it is, or the hardware blocksize is | |
647 | * larger than the blocksize the user specified, then use | |
648 | * that value. | |
649 | */ | |
650 | /* | |
651 | * What if bugger tells us to go beyond page size? | |
652 | */ | |
653 | opt.blocksize = sb_min_blocksize(s, opt.blocksize); | |
654 | ||
655 | sbi->s_high_sierra = 0; /* default is iso9660 */ | |
86a1da6d DH |
656 | sbi->s_session = opt.session; |
657 | sbi->s_sbsector = opt.sbsector; | |
1da177e4 LT |
658 | |
659 | vol_desc_start = (opt.sbsector != -1) ? | |
660 | opt.sbsector : isofs_get_last_session(s,opt.session); | |
661 | ||
c3ed85a3 DJ |
662 | for (iso_blknum = vol_desc_start+16; |
663 | iso_blknum < vol_desc_start+100; iso_blknum++) { | |
664 | struct hs_volume_descriptor *hdp; | |
665 | struct iso_volume_descriptor *vdp; | |
666 | ||
667 | block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits); | |
668 | if (!(bh = sb_bread(s, block))) | |
669 | goto out_no_read; | |
670 | ||
671 | vdp = (struct iso_volume_descriptor *)bh->b_data; | |
672 | hdp = (struct hs_volume_descriptor *)bh->b_data; | |
673 | ||
674 | /* | |
675 | * Due to the overlapping physical location of the descriptors, | |
676 | * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure | |
677 | * proper identification in this case, we first check for ISO. | |
678 | */ | |
679 | if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) { | |
680 | if (isonum_711(vdp->type) == ISO_VD_END) | |
681 | break; | |
682 | if (isonum_711(vdp->type) == ISO_VD_PRIMARY) { | |
e96e8a1d | 683 | if (!pri) { |
c3ed85a3 DJ |
684 | pri = (struct iso_primary_descriptor *)vdp; |
685 | /* Save the buffer in case we need it ... */ | |
686 | pri_bh = bh; | |
687 | bh = NULL; | |
688 | } | |
689 | } | |
1da177e4 | 690 | #ifdef CONFIG_JOLIET |
c3ed85a3 DJ |
691 | else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) { |
692 | sec = (struct iso_supplementary_descriptor *)vdp; | |
693 | if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) { | |
8711c67b | 694 | if (opt.joliet) { |
c3ed85a3 DJ |
695 | if (sec->escape[2] == 0x40) |
696 | joliet_level = 1; | |
697 | else if (sec->escape[2] == 0x43) | |
698 | joliet_level = 2; | |
699 | else if (sec->escape[2] == 0x45) | |
700 | joliet_level = 3; | |
701 | ||
702 | printk(KERN_DEBUG "ISO 9660 Extensions: " | |
703 | "Microsoft Joliet Level %d\n", | |
704 | joliet_level); | |
705 | } | |
706 | goto root_found; | |
707 | } else { | |
708 | /* Unknown supplementary volume descriptor */ | |
709 | sec = NULL; | |
710 | } | |
1da177e4 | 711 | } |
1da177e4 | 712 | #endif |
c3ed85a3 DJ |
713 | } else { |
714 | if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) { | |
715 | if (isonum_711(hdp->type) != ISO_VD_PRIMARY) | |
716 | goto out_freebh; | |
717 | ||
718 | sbi->s_high_sierra = 1; | |
5404ac8e | 719 | opt.rock = 0; |
c3ed85a3 DJ |
720 | h_pri = (struct hs_primary_descriptor *)vdp; |
721 | goto root_found; | |
722 | } | |
1da177e4 | 723 | } |
1da177e4 | 724 | |
c3ed85a3 | 725 | /* Just skip any volume descriptors we don't recognize */ |
1da177e4 | 726 | |
c3ed85a3 DJ |
727 | brelse(bh); |
728 | bh = NULL; | |
1da177e4 LT |
729 | } |
730 | /* | |
731 | * If we fall through, either no volume descriptor was found, | |
732 | * or else we passed a primary descriptor looking for others. | |
733 | */ | |
734 | if (!pri) | |
735 | goto out_unknown_format; | |
736 | brelse(bh); | |
737 | bh = pri_bh; | |
738 | pri_bh = NULL; | |
739 | ||
740 | root_found: | |
a2ed0b39 | 741 | /* We don't support read-write mounts */ |
bc98a42c | 742 | if (!sb_rdonly(s)) { |
a2ed0b39 JK |
743 | error = -EACCES; |
744 | goto out_freebh; | |
745 | } | |
1da177e4 | 746 | |
e96e8a1d | 747 | if (joliet_level && (!pri || !opt.rock)) { |
c3ed85a3 DJ |
748 | /* This is the case of Joliet with the norock mount flag. |
749 | * A disc with both Joliet and Rock Ridge is handled later | |
750 | */ | |
751 | pri = (struct iso_primary_descriptor *) sec; | |
1da177e4 LT |
752 | } |
753 | ||
754 | if(sbi->s_high_sierra){ | |
c3ed85a3 DJ |
755 | rootp = (struct iso_directory_record *) h_pri->root_directory_record; |
756 | sbi->s_nzones = isonum_733(h_pri->volume_space_size); | |
757 | sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size); | |
758 | sbi->s_max_size = isonum_733(h_pri->volume_space_size); | |
1da177e4 | 759 | } else { |
c3ed85a3 DJ |
760 | if (!pri) |
761 | goto out_freebh; | |
762 | rootp = (struct iso_directory_record *) pri->root_directory_record; | |
763 | sbi->s_nzones = isonum_733(pri->volume_space_size); | |
764 | sbi->s_log_zone_size = isonum_723(pri->logical_block_size); | |
765 | sbi->s_max_size = isonum_733(pri->volume_space_size); | |
1da177e4 LT |
766 | } |
767 | ||
768 | sbi->s_ninodes = 0; /* No way to figure this out easily */ | |
769 | ||
770 | orig_zonesize = sbi->s_log_zone_size; | |
771 | /* | |
772 | * If the zone size is smaller than the hardware sector size, | |
773 | * this is a fatal error. This would occur if the disc drive | |
774 | * had sectors that were 2048 bytes, but the filesystem had | |
775 | * blocks that were 512 bytes (which should only very rarely | |
776 | * happen.) | |
777 | */ | |
c3ed85a3 | 778 | if (orig_zonesize < opt.blocksize) |
1da177e4 LT |
779 | goto out_bad_size; |
780 | ||
781 | /* RDE: convert log zone size to bit shift */ | |
c3ed85a3 DJ |
782 | switch (sbi->s_log_zone_size) { |
783 | case 512: sbi->s_log_zone_size = 9; break; | |
784 | case 1024: sbi->s_log_zone_size = 10; break; | |
785 | case 2048: sbi->s_log_zone_size = 11; break; | |
1da177e4 | 786 | |
c3ed85a3 | 787 | default: |
1da177e4 | 788 | goto out_bad_zone_size; |
c3ed85a3 | 789 | } |
1da177e4 LT |
790 | |
791 | s->s_magic = ISOFS_SUPER_MAGIC; | |
66a362a2 JA |
792 | |
793 | /* | |
794 | * With multi-extent files, file size is only limited by the maximum | |
795 | * size of a file system, which is 8 TB. | |
796 | */ | |
797 | s->s_maxbytes = 0x80000000000LL; | |
1da177e4 | 798 | |
1da177e4 LT |
799 | /* Set this for reference. Its not currently used except on write |
800 | which we don't have .. */ | |
c3ed85a3 DJ |
801 | |
802 | first_data_zone = isonum_733(rootp->extent) + | |
803 | isonum_711(rootp->ext_attr_length); | |
1da177e4 LT |
804 | sbi->s_firstdatazone = first_data_zone; |
805 | #ifndef BEQUIET | |
c3ed85a3 DJ |
806 | printk(KERN_DEBUG "ISOFS: Max size:%ld Log zone size:%ld\n", |
807 | sbi->s_max_size, 1UL << sbi->s_log_zone_size); | |
808 | printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone); | |
1da177e4 | 809 | if(sbi->s_high_sierra) |
c3ed85a3 | 810 | printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n"); |
1da177e4 LT |
811 | #endif |
812 | ||
813 | /* | |
814 | * If the Joliet level is set, we _may_ decide to use the | |
815 | * secondary descriptor, but can't be sure until after we | |
816 | * read the root inode. But before reading the root inode | |
817 | * we may need to change the device blocksize, and would | |
818 | * rather release the old buffer first. So, we cache the | |
819 | * first_data_zone value from the secondary descriptor. | |
820 | */ | |
821 | if (joliet_level) { | |
822 | pri = (struct iso_primary_descriptor *) sec; | |
823 | rootp = (struct iso_directory_record *) | |
824 | pri->root_directory_record; | |
c3ed85a3 DJ |
825 | first_data_zone = isonum_733(rootp->extent) + |
826 | isonum_711(rootp->ext_attr_length); | |
1da177e4 LT |
827 | } |
828 | ||
829 | /* | |
830 | * We're all done using the volume descriptor, and may need | |
831 | * to change the device blocksize, so release the buffer now. | |
832 | */ | |
833 | brelse(pri_bh); | |
834 | brelse(bh); | |
835 | ||
836 | /* | |
837 | * Force the blocksize to 512 for 512 byte sectors. The file | |
838 | * read primitives really get it wrong in a bad way if we don't | |
839 | * do this. | |
840 | * | |
841 | * Note - we should never be setting the blocksize to something | |
842 | * less than the hardware sector size for the device. If we | |
843 | * do, we would end up having to read larger buffers and split | |
844 | * out portions to satisfy requests. | |
845 | * | |
846 | * Note2- the idea here is that we want to deal with the optimal | |
847 | * zonesize in the filesystem. If we have it set to something less, | |
848 | * then we have horrible problems with trying to piece together | |
849 | * bits of adjacent blocks in order to properly read directory | |
850 | * entries. By forcing the blocksize in this way, we ensure | |
851 | * that we will never be required to do this. | |
852 | */ | |
853 | sb_set_blocksize(s, orig_zonesize); | |
854 | ||
855 | sbi->s_nls_iocharset = NULL; | |
856 | ||
857 | #ifdef CONFIG_JOLIET | |
858 | if (joliet_level && opt.utf8 == 0) { | |
c3ed85a3 | 859 | char *p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT; |
1da177e4 LT |
860 | sbi->s_nls_iocharset = load_nls(p); |
861 | if (! sbi->s_nls_iocharset) { | |
862 | /* Fail only if explicit charset specified */ | |
863 | if (opt.iocharset) | |
864 | goto out_freesbi; | |
865 | sbi->s_nls_iocharset = load_nls_default(); | |
866 | } | |
867 | } | |
868 | #endif | |
869 | s->s_op = &isofs_sops; | |
870 | s->s_export_op = &isofs_export_ops; | |
871 | sbi->s_mapping = opt.map; | |
5404ac8e | 872 | sbi->s_rock = (opt.rock ? 2 : 0); |
1da177e4 LT |
873 | sbi->s_rock_offset = -1; /* initial offset, will guess until SP is found*/ |
874 | sbi->s_cruft = opt.cruft; | |
9769f4eb JW |
875 | sbi->s_hide = opt.hide; |
876 | sbi->s_showassoc = opt.showassoc; | |
1da177e4 LT |
877 | sbi->s_uid = opt.uid; |
878 | sbi->s_gid = opt.gid; | |
5c4a656b JK |
879 | sbi->s_uid_set = opt.uid_set; |
880 | sbi->s_gid_set = opt.gid_set; | |
1da177e4 LT |
881 | sbi->s_utf8 = opt.utf8; |
882 | sbi->s_nocompress = opt.nocompress; | |
52b680c8 | 883 | sbi->s_overriderockperm = opt.overriderockperm; |
1da177e4 LT |
884 | /* |
885 | * It would be incredibly stupid to allow people to mark every file | |
886 | * on the disk as suid, so we merely allow them to set the default | |
887 | * permissions. | |
888 | */ | |
52b680c8 JK |
889 | if (opt.fmode != ISOFS_INVALID_MODE) |
890 | sbi->s_fmode = opt.fmode & 0777; | |
891 | else | |
892 | sbi->s_fmode = ISOFS_INVALID_MODE; | |
893 | if (opt.dmode != ISOFS_INVALID_MODE) | |
894 | sbi->s_dmode = opt.dmode & 0777; | |
895 | else | |
896 | sbi->s_dmode = ISOFS_INVALID_MODE; | |
1da177e4 LT |
897 | |
898 | /* | |
899 | * Read the root inode, which _may_ result in changing | |
900 | * the s_rock flag. Once we have the final s_rock value, | |
901 | * we then decide whether to use the Joliet descriptor. | |
902 | */ | |
903 | inode = isofs_iget(s, sbi->s_firstdatazone, 0); | |
c4386c83 DH |
904 | if (IS_ERR(inode)) |
905 | goto out_no_root; | |
1da177e4 | 906 | |
e45c9eff OZ |
907 | /* |
908 | * Fix for broken CDs with Rock Ridge and empty ISO root directory but | |
909 | * correct Joliet root directory. | |
910 | */ | |
911 | if (sbi->s_rock == 1 && joliet_level && | |
912 | rootdir_empty(s, sbi->s_firstdatazone)) { | |
913 | printk(KERN_NOTICE | |
914 | "ISOFS: primary root directory is empty. " | |
915 | "Disabling Rock Ridge and switching to Joliet."); | |
916 | sbi->s_rock = 0; | |
917 | } | |
918 | ||
1da177e4 LT |
919 | /* |
920 | * If this disk has both Rock Ridge and Joliet on it, then we | |
921 | * want to use Rock Ridge by default. This can be overridden | |
922 | * by using the norock mount option. There is still one other | |
923 | * possibility that is not taken into account: a Rock Ridge | |
924 | * CD with Unicode names. Until someone sees such a beast, it | |
925 | * will not be supported. | |
926 | */ | |
927 | if (sbi->s_rock == 1) { | |
928 | joliet_level = 0; | |
929 | } else if (joliet_level) { | |
930 | sbi->s_rock = 0; | |
931 | if (sbi->s_firstdatazone != first_data_zone) { | |
932 | sbi->s_firstdatazone = first_data_zone; | |
c3ed85a3 | 933 | printk(KERN_DEBUG |
1da177e4 LT |
934 | "ISOFS: changing to secondary root\n"); |
935 | iput(inode); | |
936 | inode = isofs_iget(s, sbi->s_firstdatazone, 0); | |
c4386c83 DH |
937 | if (IS_ERR(inode)) |
938 | goto out_no_root; | |
1da177e4 LT |
939 | } |
940 | } | |
941 | ||
942 | if (opt.check == 'u') { | |
943 | /* Only Joliet is case insensitive by default */ | |
c3ed85a3 DJ |
944 | if (joliet_level) |
945 | opt.check = 'r'; | |
946 | else | |
947 | opt.check = 's'; | |
1da177e4 LT |
948 | } |
949 | sbi->s_joliet_level = joliet_level; | |
950 | ||
817794e0 KK |
951 | /* Make sure the root inode is a directory */ |
952 | if (!S_ISDIR(inode->i_mode)) { | |
953 | printk(KERN_WARNING | |
954 | "isofs_fill_super: root inode is not a directory. " | |
955 | "Corrupted media?\n"); | |
956 | goto out_iput; | |
957 | } | |
958 | ||
1da177e4 | 959 | table = 0; |
c3ed85a3 DJ |
960 | if (joliet_level) |
961 | table += 2; | |
962 | if (opt.check == 'r') | |
963 | table++; | |
86a1da6d | 964 | sbi->s_check = opt.check; |
6cc9c1d2 | 965 | |
b0afd8e5 AV |
966 | if (table) |
967 | s->s_d_op = &isofs_dentry_ops[table - 1]; | |
6cc9c1d2 AV |
968 | |
969 | /* get the root dentry */ | |
48fde701 | 970 | s->s_root = d_make_root(inode); |
8fdd8c49 | 971 | if (!(s->s_root)) { |
8fdd8c49 AV |
972 | error = -ENOMEM; |
973 | goto out_no_inode; | |
974 | } | |
1da177e4 | 975 | |
f99d49ad | 976 | kfree(opt.iocharset); |
1da177e4 LT |
977 | |
978 | return 0; | |
979 | ||
980 | /* | |
981 | * Display error messages and free resources. | |
982 | */ | |
1da177e4 LT |
983 | out_iput: |
984 | iput(inode); | |
c4386c83 DH |
985 | goto out_no_inode; |
986 | out_no_root: | |
987 | error = PTR_ERR(inode); | |
988 | if (error != -ENOMEM) | |
989 | printk(KERN_WARNING "%s: get root inode failed\n", __func__); | |
990 | out_no_inode: | |
1da177e4 | 991 | #ifdef CONFIG_JOLIET |
6d729e44 | 992 | unload_nls(sbi->s_nls_iocharset); |
1da177e4 LT |
993 | #endif |
994 | goto out_freesbi; | |
995 | out_no_read: | |
c3ed85a3 DJ |
996 | printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n", |
997 | __func__, s->s_id, iso_blknum, block); | |
c11760c6 | 998 | goto out_freebh; |
1da177e4 | 999 | out_bad_zone_size: |
c3ed85a3 | 1000 | printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n", |
1da177e4 LT |
1001 | sbi->s_log_zone_size); |
1002 | goto out_freebh; | |
1003 | out_bad_size: | |
c3ed85a3 | 1004 | printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n", |
1da177e4 LT |
1005 | orig_zonesize, opt.blocksize); |
1006 | goto out_freebh; | |
1007 | out_unknown_format: | |
1008 | if (!silent) | |
c3ed85a3 | 1009 | printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n"); |
1da177e4 LT |
1010 | |
1011 | out_freebh: | |
1012 | brelse(bh); | |
c11760c6 | 1013 | brelse(pri_bh); |
1da177e4 | 1014 | out_freesbi: |
f99d49ad | 1015 | kfree(opt.iocharset); |
1da177e4 LT |
1016 | kfree(sbi); |
1017 | s->s_fs_info = NULL; | |
c4386c83 | 1018 | return error; |
1da177e4 LT |
1019 | } |
1020 | ||
726c3342 | 1021 | static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1022 | { |
726c3342 | 1023 | struct super_block *sb = dentry->d_sb; |
2430c4da | 1024 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 1025 | |
1da177e4 LT |
1026 | buf->f_type = ISOFS_SUPER_MAGIC; |
1027 | buf->f_bsize = sb->s_blocksize; | |
1028 | buf->f_blocks = (ISOFS_SB(sb)->s_nzones | |
c3ed85a3 | 1029 | << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits)); |
1da177e4 LT |
1030 | buf->f_bfree = 0; |
1031 | buf->f_bavail = 0; | |
1032 | buf->f_files = ISOFS_SB(sb)->s_ninodes; | |
1033 | buf->f_ffree = 0; | |
2430c4da CL |
1034 | buf->f_fsid.val[0] = (u32)id; |
1035 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
1036 | buf->f_namelen = NAME_MAX; |
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * Get a set of blocks; filling in buffer_heads if already allocated | |
1042 | * or getblk() if they are not. Returns the number of blocks inserted | |
c4386c83 | 1043 | * (-ve == error.) |
1da177e4 | 1044 | */ |
fde214d4 | 1045 | int isofs_get_blocks(struct inode *inode, sector_t iblock, |
1da177e4 LT |
1046 | struct buffer_head **bh, unsigned long nblocks) |
1047 | { | |
fde214d4 | 1048 | unsigned long b_off = iblock; |
1da177e4 LT |
1049 | unsigned offset, sect_size; |
1050 | unsigned int firstext; | |
1051 | unsigned long nextblk, nextoff; | |
c4386c83 | 1052 | int section, rv, error; |
1da177e4 LT |
1053 | struct iso_inode_info *ei = ISOFS_I(inode); |
1054 | ||
c4386c83 | 1055 | error = -EIO; |
1da177e4 | 1056 | rv = 0; |
fde214d4 | 1057 | if (iblock != b_off) { |
c3ed85a3 | 1058 | printk(KERN_DEBUG "%s: block number too large\n", __func__); |
1da177e4 LT |
1059 | goto abort; |
1060 | } | |
1061 | ||
c3ed85a3 DJ |
1062 | |
1063 | offset = 0; | |
1064 | firstext = ei->i_first_extent; | |
1da177e4 | 1065 | sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode); |
c3ed85a3 DJ |
1066 | nextblk = ei->i_next_section_block; |
1067 | nextoff = ei->i_next_section_offset; | |
1068 | section = 0; | |
1da177e4 | 1069 | |
c3ed85a3 | 1070 | while (nblocks) { |
1da177e4 LT |
1071 | /* If we are *way* beyond the end of the file, print a message. |
1072 | * Access beyond the end of the file up to the next page boundary | |
1073 | * is normal, however because of the way the page cache works. | |
1074 | * In this case, we just return 0 so that we can properly fill | |
1075 | * the page with useless information without generating any | |
1076 | * I/O errors. | |
1077 | */ | |
09cbfeaf | 1078 | if (b_off > ((inode->i_size + PAGE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) { |
fde214d4 JK |
1079 | printk(KERN_DEBUG "%s: block >= EOF (%lu, %llu)\n", |
1080 | __func__, b_off, | |
1081 | (unsigned long long)inode->i_size); | |
1da177e4 LT |
1082 | goto abort; |
1083 | } | |
c3ed85a3 | 1084 | |
fb50ae74 JRV |
1085 | /* On the last section, nextblk == 0, section size is likely to |
1086 | * exceed sect_size by a partial block, and access beyond the | |
1087 | * end of the file will reach beyond the section size, too. | |
1088 | */ | |
1089 | while (nextblk && (b_off >= (offset + sect_size))) { | |
1090 | struct inode *ninode; | |
1091 | ||
1092 | offset += sect_size; | |
1093 | ninode = isofs_iget(inode->i_sb, nextblk, nextoff); | |
c4386c83 DH |
1094 | if (IS_ERR(ninode)) { |
1095 | error = PTR_ERR(ninode); | |
fb50ae74 | 1096 | goto abort; |
c4386c83 | 1097 | } |
fb50ae74 JRV |
1098 | firstext = ISOFS_I(ninode)->i_first_extent; |
1099 | sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode); | |
1100 | nextblk = ISOFS_I(ninode)->i_next_section_block; | |
1101 | nextoff = ISOFS_I(ninode)->i_next_section_offset; | |
1102 | iput(ninode); | |
1103 | ||
1104 | if (++section > 100) { | |
c3ed85a3 DJ |
1105 | printk(KERN_DEBUG "%s: More than 100 file sections ?!?" |
1106 | " aborting...\n", __func__); | |
fde214d4 | 1107 | printk(KERN_DEBUG "%s: block=%lu firstext=%u sect_size=%u " |
c3ed85a3 | 1108 | "nextblk=%lu nextoff=%lu\n", __func__, |
fde214d4 | 1109 | b_off, firstext, (unsigned) sect_size, |
c3ed85a3 | 1110 | nextblk, nextoff); |
fb50ae74 | 1111 | goto abort; |
1da177e4 LT |
1112 | } |
1113 | } | |
c3ed85a3 DJ |
1114 | |
1115 | if (*bh) { | |
1da177e4 LT |
1116 | map_bh(*bh, inode->i_sb, firstext + b_off - offset); |
1117 | } else { | |
1118 | *bh = sb_getblk(inode->i_sb, firstext+b_off-offset); | |
c3ed85a3 | 1119 | if (!*bh) |
1da177e4 LT |
1120 | goto abort; |
1121 | } | |
1122 | bh++; /* Next buffer head */ | |
1123 | b_off++; /* Next buffer offset */ | |
1124 | nblocks--; | |
1125 | rv++; | |
1126 | } | |
1127 | ||
c4386c83 | 1128 | error = 0; |
1da177e4 | 1129 | abort: |
c4386c83 | 1130 | return rv != 0 ? rv : error; |
1da177e4 LT |
1131 | } |
1132 | ||
1133 | /* | |
1134 | * Used by the standard interfaces. | |
1135 | */ | |
1136 | static int isofs_get_block(struct inode *inode, sector_t iblock, | |
1137 | struct buffer_head *bh_result, int create) | |
1138 | { | |
c4386c83 DH |
1139 | int ret; |
1140 | ||
9eb7f2c6 | 1141 | if (create) { |
c3ed85a3 | 1142 | printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__); |
1da177e4 LT |
1143 | return -EROFS; |
1144 | } | |
1145 | ||
c4386c83 DH |
1146 | ret = isofs_get_blocks(inode, iblock, &bh_result, 1); |
1147 | return ret < 0 ? ret : 0; | |
1da177e4 LT |
1148 | } |
1149 | ||
1150 | static int isofs_bmap(struct inode *inode, sector_t block) | |
1151 | { | |
1152 | struct buffer_head dummy; | |
1153 | int error; | |
1154 | ||
1155 | dummy.b_state = 0; | |
1156 | dummy.b_blocknr = -1000; | |
1157 | error = isofs_get_block(inode, block, &dummy, 0); | |
1158 | if (!error) | |
1159 | return dummy.b_blocknr; | |
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | struct buffer_head *isofs_bread(struct inode *inode, sector_t block) | |
1164 | { | |
1165 | sector_t blknr = isofs_bmap(inode, block); | |
1166 | if (!blknr) | |
1167 | return NULL; | |
1168 | return sb_bread(inode->i_sb, blknr); | |
1169 | } | |
1170 | ||
1171 | static int isofs_readpage(struct file *file, struct page *page) | |
1172 | { | |
3069083c NJ |
1173 | return mpage_readpage(page, isofs_get_block); |
1174 | } | |
1175 | ||
1176 | static int isofs_readpages(struct file *file, struct address_space *mapping, | |
1177 | struct list_head *pages, unsigned nr_pages) | |
1178 | { | |
1179 | return mpage_readpages(mapping, pages, nr_pages, isofs_get_block); | |
1da177e4 LT |
1180 | } |
1181 | ||
1182 | static sector_t _isofs_bmap(struct address_space *mapping, sector_t block) | |
1183 | { | |
1184 | return generic_block_bmap(mapping,block,isofs_get_block); | |
1185 | } | |
1186 | ||
f5e54d6e | 1187 | static const struct address_space_operations isofs_aops = { |
1da177e4 | 1188 | .readpage = isofs_readpage, |
3069083c | 1189 | .readpages = isofs_readpages, |
1da177e4 LT |
1190 | .bmap = _isofs_bmap |
1191 | }; | |
1192 | ||
9eb7f2c6 | 1193 | static int isofs_read_level3_size(struct inode *inode) |
1da177e4 LT |
1194 | { |
1195 | unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); | |
1196 | int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra; | |
c3ed85a3 | 1197 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1198 | unsigned long block, offset, block_saved, offset_saved; |
1199 | int i = 0; | |
1200 | int more_entries = 0; | |
c3ed85a3 | 1201 | struct iso_directory_record *tmpde = NULL; |
1da177e4 LT |
1202 | struct iso_inode_info *ei = ISOFS_I(inode); |
1203 | ||
1204 | inode->i_size = 0; | |
1205 | ||
1206 | /* The first 16 blocks are reserved as the System Area. Thus, | |
1207 | * no inodes can appear in block 0. We use this to flag that | |
1208 | * this is the last section. */ | |
1209 | ei->i_next_section_block = 0; | |
1210 | ei->i_next_section_offset = 0; | |
1211 | ||
1212 | block = ei->i_iget5_block; | |
1213 | offset = ei->i_iget5_offset; | |
1214 | ||
1215 | do { | |
c3ed85a3 | 1216 | struct iso_directory_record *de; |
1da177e4 LT |
1217 | unsigned int de_len; |
1218 | ||
1219 | if (!bh) { | |
1220 | bh = sb_bread(inode->i_sb, block); | |
1221 | if (!bh) | |
1222 | goto out_noread; | |
1223 | } | |
1224 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
1225 | de_len = *(unsigned char *) de; | |
1226 | ||
1227 | if (de_len == 0) { | |
1228 | brelse(bh); | |
1229 | bh = NULL; | |
1230 | ++block; | |
1231 | offset = 0; | |
1232 | continue; | |
1233 | } | |
1234 | ||
1235 | block_saved = block; | |
1236 | offset_saved = offset; | |
1237 | offset += de_len; | |
1238 | ||
1239 | /* Make sure we have a full directory entry */ | |
1240 | if (offset >= bufsize) { | |
1241 | int slop = bufsize - offset + de_len; | |
1242 | if (!tmpde) { | |
1243 | tmpde = kmalloc(256, GFP_KERNEL); | |
1244 | if (!tmpde) | |
1245 | goto out_nomem; | |
1246 | } | |
1247 | memcpy(tmpde, de, slop); | |
1248 | offset &= bufsize - 1; | |
1249 | block++; | |
1250 | brelse(bh); | |
1251 | bh = NULL; | |
1252 | if (offset) { | |
1253 | bh = sb_bread(inode->i_sb, block); | |
1254 | if (!bh) | |
1255 | goto out_noread; | |
9eb7f2c6 | 1256 | memcpy((void *)tmpde+slop, bh->b_data, offset); |
1da177e4 LT |
1257 | } |
1258 | de = tmpde; | |
1259 | } | |
1260 | ||
1261 | inode->i_size += isonum_733(de->size); | |
1262 | if (i == 1) { | |
1263 | ei->i_next_section_block = block_saved; | |
1264 | ei->i_next_section_offset = offset_saved; | |
1265 | } | |
1266 | ||
1267 | more_entries = de->flags[-high_sierra] & 0x80; | |
1268 | ||
1269 | i++; | |
9eb7f2c6 | 1270 | if (i > 100) |
1da177e4 | 1271 | goto out_toomany; |
9eb7f2c6 | 1272 | } while (more_entries); |
1da177e4 | 1273 | out: |
9eb7f2c6 | 1274 | kfree(tmpde); |
1da177e4 LT |
1275 | if (bh) |
1276 | brelse(bh); | |
1277 | return 0; | |
1278 | ||
1279 | out_nomem: | |
1280 | if (bh) | |
1281 | brelse(bh); | |
1282 | return -ENOMEM; | |
1283 | ||
1284 | out_noread: | |
1285 | printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block); | |
f99d49ad | 1286 | kfree(tmpde); |
1da177e4 LT |
1287 | return -EIO; |
1288 | ||
1289 | out_toomany: | |
c3ed85a3 DJ |
1290 | printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n" |
1291 | "isofs_read_level3_size: inode=%lu\n", | |
1292 | __func__, inode->i_ino); | |
1da177e4 LT |
1293 | goto out; |
1294 | } | |
1295 | ||
410dd3cf | 1296 | static int isofs_read_inode(struct inode *inode, int relocated) |
1da177e4 LT |
1297 | { |
1298 | struct super_block *sb = inode->i_sb; | |
1299 | struct isofs_sb_info *sbi = ISOFS_SB(sb); | |
1300 | unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); | |
1301 | unsigned long block; | |
1302 | int high_sierra = sbi->s_high_sierra; | |
def12ec5 | 1303 | struct buffer_head *bh; |
c3ed85a3 DJ |
1304 | struct iso_directory_record *de; |
1305 | struct iso_directory_record *tmpde = NULL; | |
1da177e4 LT |
1306 | unsigned int de_len; |
1307 | unsigned long offset; | |
1308 | struct iso_inode_info *ei = ISOFS_I(inode); | |
c4386c83 | 1309 | int ret = -EIO; |
1da177e4 LT |
1310 | |
1311 | block = ei->i_iget5_block; | |
1312 | bh = sb_bread(inode->i_sb, block); | |
1313 | if (!bh) | |
1314 | goto out_badread; | |
1315 | ||
1316 | offset = ei->i_iget5_offset; | |
1317 | ||
1318 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
1319 | de_len = *(unsigned char *) de; | |
1320 | ||
1321 | if (offset + de_len > bufsize) { | |
1322 | int frag1 = bufsize - offset; | |
1323 | ||
1324 | tmpde = kmalloc(de_len, GFP_KERNEL); | |
e96e8a1d | 1325 | if (!tmpde) { |
c4386c83 | 1326 | ret = -ENOMEM; |
1da177e4 LT |
1327 | goto fail; |
1328 | } | |
1329 | memcpy(tmpde, bh->b_data + offset, frag1); | |
1330 | brelse(bh); | |
1331 | bh = sb_bread(inode->i_sb, ++block); | |
1332 | if (!bh) | |
1333 | goto out_badread; | |
1334 | memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1); | |
1335 | de = tmpde; | |
1336 | } | |
1337 | ||
1338 | inode->i_ino = isofs_get_ino(ei->i_iget5_block, | |
c3ed85a3 DJ |
1339 | ei->i_iget5_offset, |
1340 | ISOFS_BUFFER_BITS(inode)); | |
1da177e4 LT |
1341 | |
1342 | /* Assume it is a normal-format file unless told otherwise */ | |
1343 | ei->i_file_format = isofs_file_normal; | |
1344 | ||
1345 | if (de->flags[-high_sierra] & 2) { | |
52b680c8 JK |
1346 | if (sbi->s_dmode != ISOFS_INVALID_MODE) |
1347 | inode->i_mode = S_IFDIR | sbi->s_dmode; | |
1348 | else | |
1349 | inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
bfe86848 | 1350 | set_nlink(inode, 1); /* |
c3ed85a3 DJ |
1351 | * Set to 1. We know there are 2, but |
1352 | * the find utility tries to optimize | |
1353 | * if it is 2, and it screws up. It is | |
1354 | * easier to give 1 which tells find to | |
1355 | * do it the hard way. | |
1356 | */ | |
1da177e4 | 1357 | } else { |
52b680c8 JK |
1358 | if (sbi->s_fmode != ISOFS_INVALID_MODE) { |
1359 | inode->i_mode = S_IFREG | sbi->s_fmode; | |
1360 | } else { | |
1361 | /* | |
1362 | * Set default permissions: r-x for all. The disc | |
1363 | * could be shared with DOS machines so virtually | |
1364 | * anything could be a valid executable. | |
1365 | */ | |
1366 | inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO; | |
1367 | } | |
bfe86848 | 1368 | set_nlink(inode, 1); |
1da177e4 LT |
1369 | } |
1370 | inode->i_uid = sbi->s_uid; | |
1371 | inode->i_gid = sbi->s_gid; | |
ba52de12 | 1372 | inode->i_blocks = 0; |
1da177e4 LT |
1373 | |
1374 | ei->i_format_parm[0] = 0; | |
1375 | ei->i_format_parm[1] = 0; | |
1376 | ei->i_format_parm[2] = 0; | |
1377 | ||
c3ed85a3 | 1378 | ei->i_section_size = isonum_733(de->size); |
9eb7f2c6 | 1379 | if (de->flags[-high_sierra] & 0x80) { |
c4386c83 DH |
1380 | ret = isofs_read_level3_size(inode); |
1381 | if (ret < 0) | |
c3ed85a3 | 1382 | goto fail; |
c4386c83 | 1383 | ret = -EIO; |
1da177e4 LT |
1384 | } else { |
1385 | ei->i_next_section_block = 0; | |
1386 | ei->i_next_section_offset = 0; | |
c3ed85a3 | 1387 | inode->i_size = isonum_733(de->size); |
1da177e4 LT |
1388 | } |
1389 | ||
1390 | /* | |
1391 | * Some dipshit decided to store some other bit of information | |
1392 | * in the high byte of the file length. Truncate size in case | |
1393 | * this CDROM was mounted with the cruft option. | |
1394 | */ | |
1395 | ||
5404ac8e | 1396 | if (sbi->s_cruft) |
1da177e4 LT |
1397 | inode->i_size &= 0x00ffffff; |
1398 | ||
1399 | if (de->interleave[0]) { | |
c3ed85a3 | 1400 | printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n"); |
1da177e4 LT |
1401 | inode->i_size = 0; |
1402 | } | |
1403 | ||
1404 | /* I have no idea what file_unit_size is used for, so | |
1405 | we will flag it for now */ | |
1406 | if (de->file_unit_size[0] != 0) { | |
c3ed85a3 DJ |
1407 | printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n", |
1408 | inode->i_ino); | |
1da177e4 LT |
1409 | } |
1410 | ||
1411 | /* I have no idea what other flag bits are used for, so | |
1412 | we will flag it for now */ | |
1413 | #ifdef DEBUG | |
1414 | if((de->flags[-high_sierra] & ~2)!= 0){ | |
c3ed85a3 DJ |
1415 | printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file " |
1416 | "(%ld %x).\n", | |
1417 | inode->i_ino, de->flags[-high_sierra]); | |
1da177e4 LT |
1418 | } |
1419 | #endif | |
1420 | ||
1421 | inode->i_mtime.tv_sec = | |
1422 | inode->i_atime.tv_sec = | |
1423 | inode->i_ctime.tv_sec = iso_date(de->date, high_sierra); | |
1424 | inode->i_mtime.tv_nsec = | |
1425 | inode->i_atime.tv_nsec = | |
1426 | inode->i_ctime.tv_nsec = 0; | |
1427 | ||
c3ed85a3 DJ |
1428 | ei->i_first_extent = (isonum_733(de->extent) + |
1429 | isonum_711(de->ext_attr_length)); | |
1da177e4 LT |
1430 | |
1431 | /* Set the number of blocks for stat() - should be done before RR */ | |
c3ed85a3 | 1432 | inode->i_blocks = (inode->i_size + 511) >> 9; |
1da177e4 LT |
1433 | |
1434 | /* | |
1435 | * Now test for possible Rock Ridge extensions which will override | |
1436 | * some of these numbers in the inode structure. | |
1437 | */ | |
1438 | ||
1439 | if (!high_sierra) { | |
410dd3cf | 1440 | parse_rock_ridge_inode(de, inode, relocated); |
1da177e4 | 1441 | /* if we want uid/gid set, override the rock ridge setting */ |
5c4a656b JK |
1442 | if (sbi->s_uid_set) |
1443 | inode->i_uid = sbi->s_uid; | |
1444 | if (sbi->s_gid_set) | |
1445 | inode->i_gid = sbi->s_gid; | |
1da177e4 | 1446 | } |
52b680c8 JK |
1447 | /* Now set final access rights if overriding rock ridge setting */ |
1448 | if (S_ISDIR(inode->i_mode) && sbi->s_overriderockperm && | |
1449 | sbi->s_dmode != ISOFS_INVALID_MODE) | |
1450 | inode->i_mode = S_IFDIR | sbi->s_dmode; | |
1451 | if (S_ISREG(inode->i_mode) && sbi->s_overriderockperm && | |
1452 | sbi->s_fmode != ISOFS_INVALID_MODE) | |
1453 | inode->i_mode = S_IFREG | sbi->s_fmode; | |
1da177e4 LT |
1454 | |
1455 | /* Install the inode operations vector */ | |
1456 | if (S_ISREG(inode->i_mode)) { | |
1457 | inode->i_fop = &generic_ro_fops; | |
c3ed85a3 | 1458 | switch (ei->i_file_format) { |
1da177e4 LT |
1459 | #ifdef CONFIG_ZISOFS |
1460 | case isofs_file_compressed: | |
1461 | inode->i_data.a_ops = &zisofs_aops; | |
1462 | break; | |
1463 | #endif | |
1464 | default: | |
1465 | inode->i_data.a_ops = &isofs_aops; | |
1466 | break; | |
1467 | } | |
1468 | } else if (S_ISDIR(inode->i_mode)) { | |
1469 | inode->i_op = &isofs_dir_inode_operations; | |
1470 | inode->i_fop = &isofs_dir_operations; | |
1471 | } else if (S_ISLNK(inode->i_mode)) { | |
1472 | inode->i_op = &page_symlink_inode_operations; | |
21fc61c7 | 1473 | inode_nohighmem(inode); |
1da177e4 LT |
1474 | inode->i_data.a_ops = &isofs_symlink_aops; |
1475 | } else | |
1476 | /* XXX - parse_rock_ridge_inode() had already set i_rdev. */ | |
1477 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1478 | ||
c4386c83 | 1479 | ret = 0; |
9eb7f2c6 | 1480 | out: |
f99d49ad | 1481 | kfree(tmpde); |
1da177e4 LT |
1482 | if (bh) |
1483 | brelse(bh); | |
c4386c83 | 1484 | return ret; |
1da177e4 | 1485 | |
9eb7f2c6 | 1486 | out_badread: |
1da177e4 | 1487 | printk(KERN_WARNING "ISOFS: unable to read i-node block\n"); |
9eb7f2c6 | 1488 | fail: |
1da177e4 LT |
1489 | goto out; |
1490 | } | |
1491 | ||
1492 | struct isofs_iget5_callback_data { | |
1493 | unsigned long block; | |
1494 | unsigned long offset; | |
1495 | }; | |
1496 | ||
1497 | static int isofs_iget5_test(struct inode *ino, void *data) | |
1498 | { | |
1499 | struct iso_inode_info *i = ISOFS_I(ino); | |
1500 | struct isofs_iget5_callback_data *d = | |
1501 | (struct isofs_iget5_callback_data*)data; | |
1502 | return (i->i_iget5_block == d->block) | |
c3ed85a3 | 1503 | && (i->i_iget5_offset == d->offset); |
1da177e4 LT |
1504 | } |
1505 | ||
1506 | static int isofs_iget5_set(struct inode *ino, void *data) | |
1507 | { | |
1508 | struct iso_inode_info *i = ISOFS_I(ino); | |
1509 | struct isofs_iget5_callback_data *d = | |
1510 | (struct isofs_iget5_callback_data*)data; | |
1511 | i->i_iget5_block = d->block; | |
1512 | i->i_iget5_offset = d->offset; | |
1513 | return 0; | |
1514 | } | |
1515 | ||
1516 | /* Store, in the inode's containing structure, the block and block | |
1517 | * offset that point to the underlying meta-data for the inode. The | |
1518 | * code below is otherwise similar to the iget() code in | |
1519 | * include/linux/fs.h */ | |
410dd3cf JK |
1520 | struct inode *__isofs_iget(struct super_block *sb, |
1521 | unsigned long block, | |
1522 | unsigned long offset, | |
1523 | int relocated) | |
1da177e4 LT |
1524 | { |
1525 | unsigned long hashval; | |
1526 | struct inode *inode; | |
1527 | struct isofs_iget5_callback_data data; | |
c4386c83 | 1528 | long ret; |
1da177e4 LT |
1529 | |
1530 | if (offset >= 1ul << sb->s_blocksize_bits) | |
c4386c83 | 1531 | return ERR_PTR(-EINVAL); |
1da177e4 LT |
1532 | |
1533 | data.block = block; | |
1534 | data.offset = offset; | |
1535 | ||
1536 | hashval = (block << sb->s_blocksize_bits) | offset; | |
1537 | ||
9eb7f2c6 | 1538 | inode = iget5_locked(sb, hashval, &isofs_iget5_test, |
c3ed85a3 | 1539 | &isofs_iget5_set, &data); |
1da177e4 | 1540 | |
c4386c83 DH |
1541 | if (!inode) |
1542 | return ERR_PTR(-ENOMEM); | |
1543 | ||
1544 | if (inode->i_state & I_NEW) { | |
410dd3cf | 1545 | ret = isofs_read_inode(inode, relocated); |
c4386c83 DH |
1546 | if (ret < 0) { |
1547 | iget_failed(inode); | |
1548 | inode = ERR_PTR(ret); | |
1549 | } else { | |
1550 | unlock_new_inode(inode); | |
1551 | } | |
1da177e4 LT |
1552 | } |
1553 | ||
1554 | return inode; | |
1555 | } | |
1556 | ||
152a0836 AV |
1557 | static struct dentry *isofs_mount(struct file_system_type *fs_type, |
1558 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1559 | { |
152a0836 | 1560 | return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super); |
1da177e4 LT |
1561 | } |
1562 | ||
1563 | static struct file_system_type iso9660_fs_type = { | |
1564 | .owner = THIS_MODULE, | |
1565 | .name = "iso9660", | |
152a0836 | 1566 | .mount = isofs_mount, |
1da177e4 LT |
1567 | .kill_sb = kill_block_super, |
1568 | .fs_flags = FS_REQUIRES_DEV, | |
1569 | }; | |
7f78e035 | 1570 | MODULE_ALIAS_FS("iso9660"); |
fa7614dd | 1571 | MODULE_ALIAS("iso9660"); |
1da177e4 LT |
1572 | |
1573 | static int __init init_iso9660_fs(void) | |
1574 | { | |
1575 | int err = init_inodecache(); | |
1576 | if (err) | |
1577 | goto out; | |
1578 | #ifdef CONFIG_ZISOFS | |
1579 | err = zisofs_init(); | |
1580 | if (err) | |
1581 | goto out1; | |
1582 | #endif | |
1583 | err = register_filesystem(&iso9660_fs_type); | |
1584 | if (err) | |
1585 | goto out2; | |
1586 | return 0; | |
1587 | out2: | |
1588 | #ifdef CONFIG_ZISOFS | |
1589 | zisofs_cleanup(); | |
1590 | out1: | |
1591 | #endif | |
1592 | destroy_inodecache(); | |
1593 | out: | |
1594 | return err; | |
1595 | } | |
1596 | ||
1597 | static void __exit exit_iso9660_fs(void) | |
1598 | { | |
1599 | unregister_filesystem(&iso9660_fs_type); | |
1600 | #ifdef CONFIG_ZISOFS | |
1601 | zisofs_cleanup(); | |
1602 | #endif | |
1603 | destroy_inodecache(); | |
1604 | } | |
1605 | ||
1606 | module_init(init_iso9660_fs) | |
1607 | module_exit(exit_iso9660_fs) | |
1608 | MODULE_LICENSE("GPL"); |