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Commit | Line | Data |
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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> |
1da177e4 LT |
18 | #include <linux/nls.h> |
19 | #include <linux/ctype.h> | |
94f2f715 AV |
20 | #include <linux/statfs.h> |
21 | #include <linux/cdrom.h> | |
1da177e4 | 22 | #include <linux/parser.h> |
1da177e4 | 23 | |
94f2f715 | 24 | #include "isofs.h" |
1da177e4 LT |
25 | #include "zisofs.h" |
26 | ||
27 | #define BEQUIET | |
28 | ||
1da177e4 LT |
29 | static int isofs_hashi(struct dentry *parent, struct qstr *qstr); |
30 | static int isofs_hash(struct dentry *parent, struct qstr *qstr); | |
621e155a NP |
31 | static int isofs_dentry_cmpi(const struct dentry *parent, |
32 | const struct inode *pinode, | |
33 | const struct dentry *dentry, const struct inode *inode, | |
34 | unsigned int len, const char *str, const struct qstr *name); | |
35 | static int isofs_dentry_cmp(const struct dentry *parent, | |
36 | const struct inode *pinode, | |
37 | const struct dentry *dentry, const struct inode *inode, | |
38 | unsigned int len, const char *str, const struct qstr *name); | |
1da177e4 LT |
39 | |
40 | #ifdef CONFIG_JOLIET | |
41 | static int isofs_hashi_ms(struct dentry *parent, struct qstr *qstr); | |
42 | static int isofs_hash_ms(struct dentry *parent, struct qstr *qstr); | |
621e155a NP |
43 | static int isofs_dentry_cmpi_ms(const struct dentry *parent, |
44 | const struct inode *pinode, | |
45 | const struct dentry *dentry, const struct inode *inode, | |
46 | unsigned int len, const char *str, const struct qstr *name); | |
47 | static int isofs_dentry_cmp_ms(const struct dentry *parent, | |
48 | const struct inode *pinode, | |
49 | const struct dentry *dentry, const struct inode *inode, | |
50 | unsigned int len, const char *str, const struct qstr *name); | |
1da177e4 LT |
51 | #endif |
52 | ||
53 | static void isofs_put_super(struct super_block *sb) | |
54 | { | |
55 | struct isofs_sb_info *sbi = ISOFS_SB(sb); | |
6cfd0148 | 56 | |
1da177e4 | 57 | #ifdef CONFIG_JOLIET |
6d729e44 | 58 | unload_nls(sbi->s_nls_iocharset); |
1da177e4 LT |
59 | #endif |
60 | ||
1da177e4 LT |
61 | kfree(sbi); |
62 | sb->s_fs_info = NULL; | |
63 | return; | |
64 | } | |
65 | ||
c4386c83 | 66 | static int isofs_read_inode(struct inode *); |
726c3342 | 67 | static int isofs_statfs (struct dentry *, struct kstatfs *); |
1da177e4 | 68 | |
e18b890b | 69 | static struct kmem_cache *isofs_inode_cachep; |
1da177e4 LT |
70 | |
71 | static struct inode *isofs_alloc_inode(struct super_block *sb) | |
72 | { | |
73 | struct iso_inode_info *ei; | |
e94b1766 | 74 | ei = kmem_cache_alloc(isofs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
75 | if (!ei) |
76 | return NULL; | |
77 | return &ei->vfs_inode; | |
78 | } | |
79 | ||
80 | static void isofs_destroy_inode(struct inode *inode) | |
81 | { | |
82 | kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode)); | |
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 | |
1da177e4 LT |
92 | static int init_inodecache(void) |
93 | { | |
94 | isofs_inode_cachep = kmem_cache_create("isofs_inode_cache", | |
c3ed85a3 DJ |
95 | sizeof(struct iso_inode_info), |
96 | 0, (SLAB_RECLAIM_ACCOUNT| | |
97 | SLAB_MEM_SPREAD), | |
20c2df83 | 98 | init_once); |
1da177e4 LT |
99 | if (isofs_inode_cachep == NULL) |
100 | return -ENOMEM; | |
101 | return 0; | |
102 | } | |
103 | ||
104 | static void destroy_inodecache(void) | |
105 | { | |
1a1d92c1 | 106 | kmem_cache_destroy(isofs_inode_cachep); |
1da177e4 LT |
107 | } |
108 | ||
109 | static int isofs_remount(struct super_block *sb, int *flags, char *data) | |
110 | { | |
111 | /* we probably want a lot more here */ | |
112 | *flags |= MS_RDONLY; | |
113 | return 0; | |
114 | } | |
115 | ||
ee9b6d61 | 116 | static const struct super_operations isofs_sops = { |
1da177e4 LT |
117 | .alloc_inode = isofs_alloc_inode, |
118 | .destroy_inode = isofs_destroy_inode, | |
1da177e4 LT |
119 | .put_super = isofs_put_super, |
120 | .statfs = isofs_statfs, | |
121 | .remount_fs = isofs_remount, | |
d0132eea | 122 | .show_options = generic_show_options, |
1da177e4 LT |
123 | }; |
124 | ||
125 | ||
e16404ed | 126 | static const struct dentry_operations isofs_dentry_ops[] = { |
1da177e4 LT |
127 | { |
128 | .d_hash = isofs_hash, | |
129 | .d_compare = isofs_dentry_cmp, | |
130 | }, | |
131 | { | |
132 | .d_hash = isofs_hashi, | |
133 | .d_compare = isofs_dentry_cmpi, | |
134 | }, | |
135 | #ifdef CONFIG_JOLIET | |
136 | { | |
137 | .d_hash = isofs_hash_ms, | |
138 | .d_compare = isofs_dentry_cmp_ms, | |
139 | }, | |
140 | { | |
141 | .d_hash = isofs_hashi_ms, | |
142 | .d_compare = isofs_dentry_cmpi_ms, | |
9eb7f2c6 | 143 | }, |
1da177e4 LT |
144 | #endif |
145 | }; | |
146 | ||
147 | struct iso9660_options{ | |
5404ac8e | 148 | unsigned int rock:1; |
8711c67b | 149 | unsigned int joliet:1; |
5404ac8e JK |
150 | unsigned int cruft:1; |
151 | unsigned int hide:1; | |
152 | unsigned int showassoc:1; | |
153 | unsigned int nocompress:1; | |
154 | unsigned int overriderockperm:1; | |
155 | unsigned int uid_set:1; | |
156 | unsigned int gid_set:1; | |
157 | unsigned int utf8:1; | |
158 | unsigned char map; | |
1da177e4 LT |
159 | unsigned char check; |
160 | unsigned int blocksize; | |
9b7880e7 JK |
161 | mode_t fmode; |
162 | mode_t dmode; | |
1da177e4 LT |
163 | gid_t gid; |
164 | uid_t uid; | |
165 | char *iocharset; | |
c3ed85a3 DJ |
166 | /* LVE */ |
167 | s32 session; | |
168 | s32 sbsector; | |
1da177e4 LT |
169 | }; |
170 | ||
171 | /* | |
172 | * Compute the hash for the isofs name corresponding to the dentry. | |
173 | */ | |
174 | static int | |
175 | isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms) | |
176 | { | |
177 | const char *name; | |
178 | int len; | |
179 | ||
180 | len = qstr->len; | |
181 | name = qstr->name; | |
182 | if (ms) { | |
183 | while (len && name[len-1] == '.') | |
184 | len--; | |
185 | } | |
186 | ||
187 | qstr->hash = full_name_hash(name, len); | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | /* | |
193 | * Compute the hash for the isofs name corresponding to the dentry. | |
194 | */ | |
195 | static int | |
196 | isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms) | |
197 | { | |
198 | const char *name; | |
199 | int len; | |
200 | char c; | |
201 | unsigned long hash; | |
202 | ||
203 | len = qstr->len; | |
204 | name = qstr->name; | |
205 | if (ms) { | |
206 | while (len && name[len-1] == '.') | |
207 | len--; | |
208 | } | |
209 | ||
210 | hash = init_name_hash(); | |
211 | while (len--) { | |
212 | c = tolower(*name++); | |
f17e121f | 213 | hash = partial_name_hash(c, hash); |
1da177e4 LT |
214 | } |
215 | qstr->hash = end_name_hash(hash); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
220 | /* | |
621e155a | 221 | * Compare of two isofs names. |
1da177e4 | 222 | */ |
621e155a NP |
223 | static int isofs_dentry_cmp_common( |
224 | unsigned int len, const char *str, | |
225 | const struct qstr *name, int ms, int ci) | |
1da177e4 LT |
226 | { |
227 | int alen, blen; | |
228 | ||
229 | /* A filename cannot end in '.' or we treat it like it has none */ | |
621e155a NP |
230 | alen = name->len; |
231 | blen = len; | |
1da177e4 | 232 | if (ms) { |
621e155a | 233 | while (alen && name->name[alen-1] == '.') |
1da177e4 | 234 | alen--; |
621e155a | 235 | while (blen && str[blen-1] == '.') |
1da177e4 LT |
236 | blen--; |
237 | } | |
238 | if (alen == blen) { | |
621e155a NP |
239 | if (ci) { |
240 | if (strnicmp(name->name, str, alen) == 0) | |
241 | return 0; | |
242 | } else { | |
243 | if (strncmp(name->name, str, alen) == 0) | |
244 | return 0; | |
245 | } | |
1da177e4 LT |
246 | } |
247 | return 1; | |
248 | } | |
249 | ||
250 | static int | |
251 | isofs_hash(struct dentry *dentry, struct qstr *qstr) | |
252 | { | |
253 | return isofs_hash_common(dentry, qstr, 0); | |
254 | } | |
255 | ||
256 | static int | |
257 | isofs_hashi(struct dentry *dentry, struct qstr *qstr) | |
258 | { | |
259 | return isofs_hashi_common(dentry, qstr, 0); | |
260 | } | |
261 | ||
262 | static int | |
621e155a NP |
263 | isofs_dentry_cmp(const struct dentry *parent, const struct inode *pinode, |
264 | const struct dentry *dentry, const struct inode *inode, | |
265 | unsigned int len, const char *str, const struct qstr *name) | |
1da177e4 | 266 | { |
621e155a | 267 | return isofs_dentry_cmp_common(len, str, name, 0, 0); |
1da177e4 LT |
268 | } |
269 | ||
270 | static int | |
621e155a NP |
271 | isofs_dentry_cmpi(const struct dentry *parent, const struct inode *pinode, |
272 | const struct dentry *dentry, const struct inode *inode, | |
273 | unsigned int len, const char *str, const struct qstr *name) | |
1da177e4 | 274 | { |
621e155a | 275 | return isofs_dentry_cmp_common(len, str, name, 0, 1); |
1da177e4 LT |
276 | } |
277 | ||
278 | #ifdef CONFIG_JOLIET | |
279 | static int | |
280 | isofs_hash_ms(struct dentry *dentry, struct qstr *qstr) | |
281 | { | |
282 | return isofs_hash_common(dentry, qstr, 1); | |
283 | } | |
284 | ||
285 | static int | |
286 | isofs_hashi_ms(struct dentry *dentry, struct qstr *qstr) | |
287 | { | |
288 | return isofs_hashi_common(dentry, qstr, 1); | |
289 | } | |
290 | ||
291 | static int | |
621e155a NP |
292 | isofs_dentry_cmp_ms(const struct dentry *parent, const struct inode *pinode, |
293 | const struct dentry *dentry, const struct inode *inode, | |
294 | unsigned int len, const char *str, const struct qstr *name) | |
1da177e4 | 295 | { |
621e155a | 296 | return isofs_dentry_cmp_common(len, str, name, 1, 0); |
1da177e4 LT |
297 | } |
298 | ||
299 | static int | |
621e155a NP |
300 | isofs_dentry_cmpi_ms(const struct dentry *parent, const struct inode *pinode, |
301 | const struct dentry *dentry, const struct inode *inode, | |
302 | unsigned int len, const char *str, const struct qstr *name) | |
1da177e4 | 303 | { |
621e155a | 304 | return isofs_dentry_cmp_common(len, str, name, 1, 1); |
1da177e4 LT |
305 | } |
306 | #endif | |
307 | ||
308 | enum { | |
309 | Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore, | |
310 | Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet, | |
311 | Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err, | |
52b680c8 | 312 | Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode, Opt_overriderockperm, |
1da177e4 LT |
313 | }; |
314 | ||
a447c093 | 315 | static const match_table_t tokens = { |
1da177e4 LT |
316 | {Opt_norock, "norock"}, |
317 | {Opt_nojoliet, "nojoliet"}, | |
318 | {Opt_unhide, "unhide"}, | |
9769f4eb JW |
319 | {Opt_hide, "hide"}, |
320 | {Opt_showassoc, "showassoc"}, | |
1da177e4 LT |
321 | {Opt_cruft, "cruft"}, |
322 | {Opt_utf8, "utf8"}, | |
323 | {Opt_iocharset, "iocharset=%s"}, | |
324 | {Opt_map_a, "map=acorn"}, | |
325 | {Opt_map_a, "map=a"}, | |
326 | {Opt_map_n, "map=normal"}, | |
327 | {Opt_map_n, "map=n"}, | |
328 | {Opt_map_o, "map=off"}, | |
329 | {Opt_map_o, "map=o"}, | |
330 | {Opt_session, "session=%u"}, | |
331 | {Opt_sb, "sbsector=%u"}, | |
332 | {Opt_check_r, "check=relaxed"}, | |
333 | {Opt_check_r, "check=r"}, | |
334 | {Opt_check_s, "check=strict"}, | |
335 | {Opt_check_s, "check=s"}, | |
336 | {Opt_uid, "uid=%u"}, | |
337 | {Opt_gid, "gid=%u"}, | |
338 | {Opt_mode, "mode=%u"}, | |
9b7880e7 | 339 | {Opt_dmode, "dmode=%u"}, |
52b680c8 | 340 | {Opt_overriderockperm, "overriderockperm"}, |
1da177e4 LT |
341 | {Opt_block, "block=%u"}, |
342 | {Opt_ignore, "conv=binary"}, | |
343 | {Opt_ignore, "conv=b"}, | |
344 | {Opt_ignore, "conv=text"}, | |
345 | {Opt_ignore, "conv=t"}, | |
346 | {Opt_ignore, "conv=mtext"}, | |
347 | {Opt_ignore, "conv=m"}, | |
348 | {Opt_ignore, "conv=auto"}, | |
349 | {Opt_ignore, "conv=a"}, | |
350 | {Opt_nocompress, "nocompress"}, | |
351 | {Opt_err, NULL} | |
352 | }; | |
353 | ||
9eb7f2c6 | 354 | static int parse_options(char *options, struct iso9660_options *popt) |
1da177e4 LT |
355 | { |
356 | char *p; | |
357 | int option; | |
358 | ||
359 | popt->map = 'n'; | |
5404ac8e JK |
360 | popt->rock = 1; |
361 | popt->joliet = 1; | |
362 | popt->cruft = 0; | |
363 | popt->hide = 0; | |
364 | popt->showassoc = 0; | |
1da177e4 LT |
365 | popt->check = 'u'; /* unset */ |
366 | popt->nocompress = 0; | |
367 | popt->blocksize = 1024; | |
52b680c8 | 368 | popt->fmode = popt->dmode = ISOFS_INVALID_MODE; |
5c4a656b JK |
369 | popt->uid_set = 0; |
370 | popt->gid_set = 0; | |
1da177e4 LT |
371 | popt->gid = 0; |
372 | popt->uid = 0; | |
373 | popt->iocharset = NULL; | |
374 | popt->utf8 = 0; | |
52b680c8 | 375 | popt->overriderockperm = 0; |
1da177e4 LT |
376 | popt->session=-1; |
377 | popt->sbsector=-1; | |
378 | if (!options) | |
379 | return 1; | |
380 | ||
381 | while ((p = strsep(&options, ",")) != NULL) { | |
382 | int token; | |
383 | substring_t args[MAX_OPT_ARGS]; | |
384 | unsigned n; | |
385 | ||
386 | if (!*p) | |
387 | continue; | |
388 | ||
389 | token = match_token(p, tokens, args); | |
390 | switch (token) { | |
391 | case Opt_norock: | |
5404ac8e | 392 | popt->rock = 0; |
1da177e4 LT |
393 | break; |
394 | case Opt_nojoliet: | |
5404ac8e | 395 | popt->joliet = 0; |
1da177e4 | 396 | break; |
9769f4eb | 397 | case Opt_hide: |
5404ac8e | 398 | popt->hide = 1; |
9769f4eb | 399 | break; |
1da177e4 | 400 | case Opt_unhide: |
9769f4eb | 401 | case Opt_showassoc: |
5404ac8e | 402 | popt->showassoc = 1; |
1da177e4 LT |
403 | break; |
404 | case Opt_cruft: | |
5404ac8e | 405 | popt->cruft = 1; |
1da177e4 LT |
406 | break; |
407 | case Opt_utf8: | |
408 | popt->utf8 = 1; | |
409 | break; | |
410 | #ifdef CONFIG_JOLIET | |
411 | case Opt_iocharset: | |
412 | popt->iocharset = match_strdup(&args[0]); | |
413 | break; | |
414 | #endif | |
415 | case Opt_map_a: | |
416 | popt->map = 'a'; | |
417 | break; | |
418 | case Opt_map_o: | |
419 | popt->map = 'o'; | |
420 | break; | |
421 | case Opt_map_n: | |
422 | popt->map = 'n'; | |
423 | break; | |
424 | case Opt_session: | |
425 | if (match_int(&args[0], &option)) | |
426 | return 0; | |
427 | n = option; | |
428 | if (n > 99) | |
429 | return 0; | |
430 | popt->session = n + 1; | |
431 | break; | |
432 | case Opt_sb: | |
433 | if (match_int(&args[0], &option)) | |
434 | return 0; | |
435 | popt->sbsector = option; | |
436 | break; | |
437 | case Opt_check_r: | |
438 | popt->check = 'r'; | |
439 | break; | |
440 | case Opt_check_s: | |
441 | popt->check = 's'; | |
442 | break; | |
443 | case Opt_ignore: | |
444 | break; | |
445 | case Opt_uid: | |
446 | if (match_int(&args[0], &option)) | |
447 | return 0; | |
448 | popt->uid = option; | |
5c4a656b | 449 | popt->uid_set = 1; |
1da177e4 LT |
450 | break; |
451 | case Opt_gid: | |
452 | if (match_int(&args[0], &option)) | |
453 | return 0; | |
454 | popt->gid = option; | |
5c4a656b | 455 | popt->gid_set = 1; |
1da177e4 LT |
456 | break; |
457 | case Opt_mode: | |
458 | if (match_int(&args[0], &option)) | |
459 | return 0; | |
9b7880e7 JK |
460 | popt->fmode = option; |
461 | break; | |
462 | case Opt_dmode: | |
463 | if (match_int(&args[0], &option)) | |
464 | return 0; | |
465 | popt->dmode = option; | |
1da177e4 | 466 | break; |
52b680c8 JK |
467 | case Opt_overriderockperm: |
468 | popt->overriderockperm = 1; | |
469 | break; | |
1da177e4 LT |
470 | case Opt_block: |
471 | if (match_int(&args[0], &option)) | |
472 | return 0; | |
473 | n = option; | |
474 | if (n != 512 && n != 1024 && n != 2048) | |
475 | return 0; | |
476 | popt->blocksize = n; | |
477 | break; | |
478 | case Opt_nocompress: | |
479 | popt->nocompress = 1; | |
480 | break; | |
481 | default: | |
482 | return 0; | |
483 | } | |
484 | } | |
485 | return 1; | |
486 | } | |
487 | ||
488 | /* | |
489 | * look if the driver can tell the multi session redirection value | |
490 | * | |
491 | * don't change this if you don't know what you do, please! | |
492 | * Multisession is legal only with XA disks. | |
493 | * A non-XA disk with more than one volume descriptor may do it right, but | |
494 | * usually is written in a nowhere standardized "multi-partition" manner. | |
495 | * Multisession uses absolute addressing (solely the first frame of the whole | |
496 | * track is #0), multi-partition uses relative addressing (each first frame of | |
497 | * each track is #0), and a track is not a session. | |
498 | * | |
499 | * A broken CDwriter software or drive firmware does not set new standards, | |
500 | * at least not if conflicting with the existing ones. | |
501 | * | |
502 | * emoenke@gwdg.de | |
503 | */ | |
504 | #define WE_OBEY_THE_WRITTEN_STANDARDS 1 | |
505 | ||
9eb7f2c6 | 506 | static unsigned int isofs_get_last_session(struct super_block *sb, s32 session) |
1da177e4 LT |
507 | { |
508 | struct cdrom_multisession ms_info; | |
509 | unsigned int vol_desc_start; | |
510 | struct block_device *bdev = sb->s_bdev; | |
511 | int i; | |
512 | ||
513 | vol_desc_start=0; | |
514 | ms_info.addr_format=CDROM_LBA; | |
515 | if(session >= 0 && session <= 99) { | |
516 | struct cdrom_tocentry Te; | |
517 | Te.cdte_track=session; | |
518 | Te.cdte_format=CDROM_LBA; | |
519 | i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te); | |
520 | if (!i) { | |
c3ed85a3 DJ |
521 | printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n", |
522 | session, Te.cdte_addr.lba, | |
523 | Te.cdte_ctrl&CDROM_DATA_TRACK); | |
1da177e4 LT |
524 | if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4) |
525 | return Te.cdte_addr.lba; | |
526 | } | |
c3ed85a3 DJ |
527 | |
528 | printk(KERN_ERR "ISOFS: Invalid session number or type of track\n"); | |
1da177e4 LT |
529 | } |
530 | i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info); | |
9eb7f2c6 | 531 | if (session > 0) |
c3ed85a3 | 532 | printk(KERN_ERR "ISOFS: Invalid session number\n"); |
1da177e4 | 533 | #if 0 |
c3ed85a3 | 534 | printk(KERN_DEBUG "isofs.inode: CDROMMULTISESSION: rc=%d\n",i); |
1da177e4 | 535 | if (i==0) { |
c3ed85a3 DJ |
536 | printk(KERN_DEBUG "isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no"); |
537 | printk(KERN_DEBUG "isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba); | |
1da177e4 LT |
538 | } |
539 | #endif | |
540 | if (i==0) | |
541 | #if WE_OBEY_THE_WRITTEN_STANDARDS | |
c3ed85a3 | 542 | if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */ |
1da177e4 | 543 | #endif |
c3ed85a3 | 544 | vol_desc_start=ms_info.addr.lba; |
1da177e4 LT |
545 | return vol_desc_start; |
546 | } | |
547 | ||
e45c9eff OZ |
548 | /* |
549 | * Check if root directory is empty (has less than 3 files). | |
550 | * | |
551 | * Used to detect broken CDs where ISO root directory is empty but Joliet root | |
552 | * directory is OK. If such CD has Rock Ridge extensions, they will be disabled | |
553 | * (and Joliet used instead) or else no files would be visible. | |
554 | */ | |
555 | static bool rootdir_empty(struct super_block *sb, unsigned long block) | |
556 | { | |
557 | int offset = 0, files = 0, de_len; | |
558 | struct iso_directory_record *de; | |
559 | struct buffer_head *bh; | |
560 | ||
561 | bh = sb_bread(sb, block); | |
562 | if (!bh) | |
563 | return true; | |
564 | while (files < 3) { | |
565 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
566 | de_len = *(unsigned char *) de; | |
567 | if (de_len == 0) | |
568 | break; | |
569 | files++; | |
570 | offset += de_len; | |
571 | } | |
572 | brelse(bh); | |
573 | return files < 3; | |
574 | } | |
575 | ||
1da177e4 LT |
576 | /* |
577 | * Initialize the superblock and read the root inode. | |
578 | * | |
579 | * Note: a check_disk_change() has been done immediately prior | |
580 | * to this call, so we don't need to check again. | |
581 | */ | |
582 | static int isofs_fill_super(struct super_block *s, void *data, int silent) | |
583 | { | |
c3ed85a3 DJ |
584 | struct buffer_head *bh = NULL, *pri_bh = NULL; |
585 | struct hs_primary_descriptor *h_pri = NULL; | |
586 | struct iso_primary_descriptor *pri = NULL; | |
1da177e4 | 587 | struct iso_supplementary_descriptor *sec = NULL; |
c3ed85a3 DJ |
588 | struct iso_directory_record *rootp; |
589 | struct inode *inode; | |
590 | struct iso9660_options opt; | |
591 | struct isofs_sb_info *sbi; | |
592 | unsigned long first_data_zone; | |
593 | int joliet_level = 0; | |
594 | int iso_blknum, block; | |
595 | int orig_zonesize; | |
c4386c83 | 596 | int table, error = -EINVAL; |
c3ed85a3 | 597 | unsigned int vol_desc_start; |
1da177e4 | 598 | |
d0132eea MS |
599 | save_mount_options(s, data); |
600 | ||
f8314dc6 | 601 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
4f819a78 | 602 | if (!sbi) |
1da177e4 LT |
603 | return -ENOMEM; |
604 | s->s_fs_info = sbi; | |
1da177e4 | 605 | |
9eb7f2c6 | 606 | if (!parse_options((char *)data, &opt)) |
1da177e4 LT |
607 | goto out_freesbi; |
608 | ||
609 | /* | |
610 | * First of all, get the hardware blocksize for this device. | |
611 | * If we don't know what it is, or the hardware blocksize is | |
612 | * larger than the blocksize the user specified, then use | |
613 | * that value. | |
614 | */ | |
615 | /* | |
616 | * What if bugger tells us to go beyond page size? | |
617 | */ | |
618 | opt.blocksize = sb_min_blocksize(s, opt.blocksize); | |
619 | ||
620 | sbi->s_high_sierra = 0; /* default is iso9660 */ | |
621 | ||
622 | vol_desc_start = (opt.sbsector != -1) ? | |
623 | opt.sbsector : isofs_get_last_session(s,opt.session); | |
624 | ||
c3ed85a3 DJ |
625 | for (iso_blknum = vol_desc_start+16; |
626 | iso_blknum < vol_desc_start+100; iso_blknum++) { | |
627 | struct hs_volume_descriptor *hdp; | |
628 | struct iso_volume_descriptor *vdp; | |
629 | ||
630 | block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits); | |
631 | if (!(bh = sb_bread(s, block))) | |
632 | goto out_no_read; | |
633 | ||
634 | vdp = (struct iso_volume_descriptor *)bh->b_data; | |
635 | hdp = (struct hs_volume_descriptor *)bh->b_data; | |
636 | ||
637 | /* | |
638 | * Due to the overlapping physical location of the descriptors, | |
639 | * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure | |
640 | * proper identification in this case, we first check for ISO. | |
641 | */ | |
642 | if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) { | |
643 | if (isonum_711(vdp->type) == ISO_VD_END) | |
644 | break; | |
645 | if (isonum_711(vdp->type) == ISO_VD_PRIMARY) { | |
646 | if (pri == NULL) { | |
647 | pri = (struct iso_primary_descriptor *)vdp; | |
648 | /* Save the buffer in case we need it ... */ | |
649 | pri_bh = bh; | |
650 | bh = NULL; | |
651 | } | |
652 | } | |
1da177e4 | 653 | #ifdef CONFIG_JOLIET |
c3ed85a3 DJ |
654 | else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) { |
655 | sec = (struct iso_supplementary_descriptor *)vdp; | |
656 | if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) { | |
8711c67b | 657 | if (opt.joliet) { |
c3ed85a3 DJ |
658 | if (sec->escape[2] == 0x40) |
659 | joliet_level = 1; | |
660 | else if (sec->escape[2] == 0x43) | |
661 | joliet_level = 2; | |
662 | else if (sec->escape[2] == 0x45) | |
663 | joliet_level = 3; | |
664 | ||
665 | printk(KERN_DEBUG "ISO 9660 Extensions: " | |
666 | "Microsoft Joliet Level %d\n", | |
667 | joliet_level); | |
668 | } | |
669 | goto root_found; | |
670 | } else { | |
671 | /* Unknown supplementary volume descriptor */ | |
672 | sec = NULL; | |
673 | } | |
1da177e4 | 674 | } |
1da177e4 | 675 | #endif |
c3ed85a3 DJ |
676 | } else { |
677 | if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) { | |
678 | if (isonum_711(hdp->type) != ISO_VD_PRIMARY) | |
679 | goto out_freebh; | |
680 | ||
681 | sbi->s_high_sierra = 1; | |
5404ac8e | 682 | opt.rock = 0; |
c3ed85a3 DJ |
683 | h_pri = (struct hs_primary_descriptor *)vdp; |
684 | goto root_found; | |
685 | } | |
1da177e4 | 686 | } |
1da177e4 | 687 | |
c3ed85a3 | 688 | /* Just skip any volume descriptors we don't recognize */ |
1da177e4 | 689 | |
c3ed85a3 DJ |
690 | brelse(bh); |
691 | bh = NULL; | |
1da177e4 LT |
692 | } |
693 | /* | |
694 | * If we fall through, either no volume descriptor was found, | |
695 | * or else we passed a primary descriptor looking for others. | |
696 | */ | |
697 | if (!pri) | |
698 | goto out_unknown_format; | |
699 | brelse(bh); | |
700 | bh = pri_bh; | |
701 | pri_bh = NULL; | |
702 | ||
703 | root_found: | |
704 | ||
5404ac8e | 705 | if (joliet_level && (pri == NULL || !opt.rock)) { |
c3ed85a3 DJ |
706 | /* This is the case of Joliet with the norock mount flag. |
707 | * A disc with both Joliet and Rock Ridge is handled later | |
708 | */ | |
709 | pri = (struct iso_primary_descriptor *) sec; | |
1da177e4 LT |
710 | } |
711 | ||
712 | if(sbi->s_high_sierra){ | |
c3ed85a3 DJ |
713 | rootp = (struct iso_directory_record *) h_pri->root_directory_record; |
714 | sbi->s_nzones = isonum_733(h_pri->volume_space_size); | |
715 | sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size); | |
716 | sbi->s_max_size = isonum_733(h_pri->volume_space_size); | |
1da177e4 | 717 | } else { |
c3ed85a3 DJ |
718 | if (!pri) |
719 | goto out_freebh; | |
720 | rootp = (struct iso_directory_record *) pri->root_directory_record; | |
721 | sbi->s_nzones = isonum_733(pri->volume_space_size); | |
722 | sbi->s_log_zone_size = isonum_723(pri->logical_block_size); | |
723 | sbi->s_max_size = isonum_733(pri->volume_space_size); | |
1da177e4 LT |
724 | } |
725 | ||
726 | sbi->s_ninodes = 0; /* No way to figure this out easily */ | |
727 | ||
728 | orig_zonesize = sbi->s_log_zone_size; | |
729 | /* | |
730 | * If the zone size is smaller than the hardware sector size, | |
731 | * this is a fatal error. This would occur if the disc drive | |
732 | * had sectors that were 2048 bytes, but the filesystem had | |
733 | * blocks that were 512 bytes (which should only very rarely | |
734 | * happen.) | |
735 | */ | |
c3ed85a3 | 736 | if (orig_zonesize < opt.blocksize) |
1da177e4 LT |
737 | goto out_bad_size; |
738 | ||
739 | /* RDE: convert log zone size to bit shift */ | |
c3ed85a3 DJ |
740 | switch (sbi->s_log_zone_size) { |
741 | case 512: sbi->s_log_zone_size = 9; break; | |
742 | case 1024: sbi->s_log_zone_size = 10; break; | |
743 | case 2048: sbi->s_log_zone_size = 11; break; | |
1da177e4 | 744 | |
c3ed85a3 | 745 | default: |
1da177e4 | 746 | goto out_bad_zone_size; |
c3ed85a3 | 747 | } |
1da177e4 LT |
748 | |
749 | s->s_magic = ISOFS_SUPER_MAGIC; | |
66a362a2 JA |
750 | |
751 | /* | |
752 | * With multi-extent files, file size is only limited by the maximum | |
753 | * size of a file system, which is 8 TB. | |
754 | */ | |
755 | s->s_maxbytes = 0x80000000000LL; | |
1da177e4 | 756 | |
c3ed85a3 DJ |
757 | /* |
758 | * The CDROM is read-only, has no nodes (devices) on it, and since | |
759 | * all of the files appear to be owned by root, we really do not want | |
760 | * to allow suid. (suid or devices will not show up unless we have | |
761 | * Rock Ridge extensions) | |
762 | */ | |
1da177e4 LT |
763 | |
764 | s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */; | |
765 | ||
766 | /* Set this for reference. Its not currently used except on write | |
767 | which we don't have .. */ | |
c3ed85a3 DJ |
768 | |
769 | first_data_zone = isonum_733(rootp->extent) + | |
770 | isonum_711(rootp->ext_attr_length); | |
1da177e4 LT |
771 | sbi->s_firstdatazone = first_data_zone; |
772 | #ifndef BEQUIET | |
c3ed85a3 DJ |
773 | printk(KERN_DEBUG "ISOFS: Max size:%ld Log zone size:%ld\n", |
774 | sbi->s_max_size, 1UL << sbi->s_log_zone_size); | |
775 | printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone); | |
1da177e4 | 776 | if(sbi->s_high_sierra) |
c3ed85a3 | 777 | printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n"); |
1da177e4 LT |
778 | #endif |
779 | ||
780 | /* | |
781 | * If the Joliet level is set, we _may_ decide to use the | |
782 | * secondary descriptor, but can't be sure until after we | |
783 | * read the root inode. But before reading the root inode | |
784 | * we may need to change the device blocksize, and would | |
785 | * rather release the old buffer first. So, we cache the | |
786 | * first_data_zone value from the secondary descriptor. | |
787 | */ | |
788 | if (joliet_level) { | |
789 | pri = (struct iso_primary_descriptor *) sec; | |
790 | rootp = (struct iso_directory_record *) | |
791 | pri->root_directory_record; | |
c3ed85a3 DJ |
792 | first_data_zone = isonum_733(rootp->extent) + |
793 | isonum_711(rootp->ext_attr_length); | |
1da177e4 LT |
794 | } |
795 | ||
796 | /* | |
797 | * We're all done using the volume descriptor, and may need | |
798 | * to change the device blocksize, so release the buffer now. | |
799 | */ | |
800 | brelse(pri_bh); | |
801 | brelse(bh); | |
802 | ||
803 | /* | |
804 | * Force the blocksize to 512 for 512 byte sectors. The file | |
805 | * read primitives really get it wrong in a bad way if we don't | |
806 | * do this. | |
807 | * | |
808 | * Note - we should never be setting the blocksize to something | |
809 | * less than the hardware sector size for the device. If we | |
810 | * do, we would end up having to read larger buffers and split | |
811 | * out portions to satisfy requests. | |
812 | * | |
813 | * Note2- the idea here is that we want to deal with the optimal | |
814 | * zonesize in the filesystem. If we have it set to something less, | |
815 | * then we have horrible problems with trying to piece together | |
816 | * bits of adjacent blocks in order to properly read directory | |
817 | * entries. By forcing the blocksize in this way, we ensure | |
818 | * that we will never be required to do this. | |
819 | */ | |
820 | sb_set_blocksize(s, orig_zonesize); | |
821 | ||
822 | sbi->s_nls_iocharset = NULL; | |
823 | ||
824 | #ifdef CONFIG_JOLIET | |
825 | if (joliet_level && opt.utf8 == 0) { | |
c3ed85a3 | 826 | char *p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT; |
1da177e4 LT |
827 | sbi->s_nls_iocharset = load_nls(p); |
828 | if (! sbi->s_nls_iocharset) { | |
829 | /* Fail only if explicit charset specified */ | |
830 | if (opt.iocharset) | |
831 | goto out_freesbi; | |
832 | sbi->s_nls_iocharset = load_nls_default(); | |
833 | } | |
834 | } | |
835 | #endif | |
836 | s->s_op = &isofs_sops; | |
837 | s->s_export_op = &isofs_export_ops; | |
838 | sbi->s_mapping = opt.map; | |
5404ac8e | 839 | sbi->s_rock = (opt.rock ? 2 : 0); |
1da177e4 LT |
840 | sbi->s_rock_offset = -1; /* initial offset, will guess until SP is found*/ |
841 | sbi->s_cruft = opt.cruft; | |
9769f4eb JW |
842 | sbi->s_hide = opt.hide; |
843 | sbi->s_showassoc = opt.showassoc; | |
1da177e4 LT |
844 | sbi->s_uid = opt.uid; |
845 | sbi->s_gid = opt.gid; | |
5c4a656b JK |
846 | sbi->s_uid_set = opt.uid_set; |
847 | sbi->s_gid_set = opt.gid_set; | |
1da177e4 LT |
848 | sbi->s_utf8 = opt.utf8; |
849 | sbi->s_nocompress = opt.nocompress; | |
52b680c8 | 850 | sbi->s_overriderockperm = opt.overriderockperm; |
4f819a78 | 851 | mutex_init(&sbi->s_mutex); |
1da177e4 LT |
852 | /* |
853 | * It would be incredibly stupid to allow people to mark every file | |
854 | * on the disk as suid, so we merely allow them to set the default | |
855 | * permissions. | |
856 | */ | |
52b680c8 JK |
857 | if (opt.fmode != ISOFS_INVALID_MODE) |
858 | sbi->s_fmode = opt.fmode & 0777; | |
859 | else | |
860 | sbi->s_fmode = ISOFS_INVALID_MODE; | |
861 | if (opt.dmode != ISOFS_INVALID_MODE) | |
862 | sbi->s_dmode = opt.dmode & 0777; | |
863 | else | |
864 | sbi->s_dmode = ISOFS_INVALID_MODE; | |
1da177e4 LT |
865 | |
866 | /* | |
867 | * Read the root inode, which _may_ result in changing | |
868 | * the s_rock flag. Once we have the final s_rock value, | |
869 | * we then decide whether to use the Joliet descriptor. | |
870 | */ | |
871 | inode = isofs_iget(s, sbi->s_firstdatazone, 0); | |
c4386c83 DH |
872 | if (IS_ERR(inode)) |
873 | goto out_no_root; | |
1da177e4 | 874 | |
e45c9eff OZ |
875 | /* |
876 | * Fix for broken CDs with Rock Ridge and empty ISO root directory but | |
877 | * correct Joliet root directory. | |
878 | */ | |
879 | if (sbi->s_rock == 1 && joliet_level && | |
880 | rootdir_empty(s, sbi->s_firstdatazone)) { | |
881 | printk(KERN_NOTICE | |
882 | "ISOFS: primary root directory is empty. " | |
883 | "Disabling Rock Ridge and switching to Joliet."); | |
884 | sbi->s_rock = 0; | |
885 | } | |
886 | ||
1da177e4 LT |
887 | /* |
888 | * If this disk has both Rock Ridge and Joliet on it, then we | |
889 | * want to use Rock Ridge by default. This can be overridden | |
890 | * by using the norock mount option. There is still one other | |
891 | * possibility that is not taken into account: a Rock Ridge | |
892 | * CD with Unicode names. Until someone sees such a beast, it | |
893 | * will not be supported. | |
894 | */ | |
895 | if (sbi->s_rock == 1) { | |
896 | joliet_level = 0; | |
897 | } else if (joliet_level) { | |
898 | sbi->s_rock = 0; | |
899 | if (sbi->s_firstdatazone != first_data_zone) { | |
900 | sbi->s_firstdatazone = first_data_zone; | |
c3ed85a3 | 901 | printk(KERN_DEBUG |
1da177e4 LT |
902 | "ISOFS: changing to secondary root\n"); |
903 | iput(inode); | |
904 | inode = isofs_iget(s, sbi->s_firstdatazone, 0); | |
c4386c83 DH |
905 | if (IS_ERR(inode)) |
906 | goto out_no_root; | |
1da177e4 LT |
907 | } |
908 | } | |
909 | ||
910 | if (opt.check == 'u') { | |
911 | /* Only Joliet is case insensitive by default */ | |
c3ed85a3 DJ |
912 | if (joliet_level) |
913 | opt.check = 'r'; | |
914 | else | |
915 | opt.check = 's'; | |
1da177e4 LT |
916 | } |
917 | sbi->s_joliet_level = joliet_level; | |
918 | ||
817794e0 KK |
919 | /* Make sure the root inode is a directory */ |
920 | if (!S_ISDIR(inode->i_mode)) { | |
921 | printk(KERN_WARNING | |
922 | "isofs_fill_super: root inode is not a directory. " | |
923 | "Corrupted media?\n"); | |
924 | goto out_iput; | |
925 | } | |
926 | ||
1da177e4 LT |
927 | /* get the root dentry */ |
928 | s->s_root = d_alloc_root(inode); | |
929 | if (!(s->s_root)) | |
930 | goto out_no_root; | |
931 | ||
932 | table = 0; | |
c3ed85a3 DJ |
933 | if (joliet_level) |
934 | table += 2; | |
935 | if (opt.check == 'r') | |
936 | table++; | |
1da177e4 LT |
937 | s->s_root->d_op = &isofs_dentry_ops[table]; |
938 | ||
f99d49ad | 939 | kfree(opt.iocharset); |
1da177e4 LT |
940 | |
941 | return 0; | |
942 | ||
943 | /* | |
944 | * Display error messages and free resources. | |
945 | */ | |
1da177e4 LT |
946 | out_iput: |
947 | iput(inode); | |
c4386c83 DH |
948 | goto out_no_inode; |
949 | out_no_root: | |
950 | error = PTR_ERR(inode); | |
951 | if (error != -ENOMEM) | |
952 | printk(KERN_WARNING "%s: get root inode failed\n", __func__); | |
953 | out_no_inode: | |
1da177e4 | 954 | #ifdef CONFIG_JOLIET |
6d729e44 | 955 | unload_nls(sbi->s_nls_iocharset); |
1da177e4 LT |
956 | #endif |
957 | goto out_freesbi; | |
958 | out_no_read: | |
c3ed85a3 DJ |
959 | printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n", |
960 | __func__, s->s_id, iso_blknum, block); | |
1da177e4 LT |
961 | goto out_freesbi; |
962 | out_bad_zone_size: | |
c3ed85a3 | 963 | printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n", |
1da177e4 LT |
964 | sbi->s_log_zone_size); |
965 | goto out_freebh; | |
966 | out_bad_size: | |
c3ed85a3 | 967 | printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n", |
1da177e4 LT |
968 | orig_zonesize, opt.blocksize); |
969 | goto out_freebh; | |
970 | out_unknown_format: | |
971 | if (!silent) | |
c3ed85a3 | 972 | printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n"); |
1da177e4 LT |
973 | |
974 | out_freebh: | |
975 | brelse(bh); | |
976 | out_freesbi: | |
f99d49ad | 977 | kfree(opt.iocharset); |
1da177e4 LT |
978 | kfree(sbi); |
979 | s->s_fs_info = NULL; | |
c4386c83 | 980 | return error; |
1da177e4 LT |
981 | } |
982 | ||
726c3342 | 983 | static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 984 | { |
726c3342 | 985 | struct super_block *sb = dentry->d_sb; |
2430c4da | 986 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 987 | |
1da177e4 LT |
988 | buf->f_type = ISOFS_SUPER_MAGIC; |
989 | buf->f_bsize = sb->s_blocksize; | |
990 | buf->f_blocks = (ISOFS_SB(sb)->s_nzones | |
c3ed85a3 | 991 | << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits)); |
1da177e4 LT |
992 | buf->f_bfree = 0; |
993 | buf->f_bavail = 0; | |
994 | buf->f_files = ISOFS_SB(sb)->s_ninodes; | |
995 | buf->f_ffree = 0; | |
2430c4da CL |
996 | buf->f_fsid.val[0] = (u32)id; |
997 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
998 | buf->f_namelen = NAME_MAX; |
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | /* | |
1003 | * Get a set of blocks; filling in buffer_heads if already allocated | |
1004 | * or getblk() if they are not. Returns the number of blocks inserted | |
c4386c83 | 1005 | * (-ve == error.) |
1da177e4 | 1006 | */ |
fde214d4 | 1007 | int isofs_get_blocks(struct inode *inode, sector_t iblock, |
1da177e4 LT |
1008 | struct buffer_head **bh, unsigned long nblocks) |
1009 | { | |
fde214d4 | 1010 | unsigned long b_off = iblock; |
1da177e4 LT |
1011 | unsigned offset, sect_size; |
1012 | unsigned int firstext; | |
1013 | unsigned long nextblk, nextoff; | |
c4386c83 | 1014 | int section, rv, error; |
1da177e4 LT |
1015 | struct iso_inode_info *ei = ISOFS_I(inode); |
1016 | ||
c4386c83 | 1017 | error = -EIO; |
1da177e4 | 1018 | rv = 0; |
fde214d4 | 1019 | if (iblock != b_off) { |
c3ed85a3 | 1020 | printk(KERN_DEBUG "%s: block number too large\n", __func__); |
1da177e4 LT |
1021 | goto abort; |
1022 | } | |
1023 | ||
c3ed85a3 DJ |
1024 | |
1025 | offset = 0; | |
1026 | firstext = ei->i_first_extent; | |
1da177e4 | 1027 | sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode); |
c3ed85a3 DJ |
1028 | nextblk = ei->i_next_section_block; |
1029 | nextoff = ei->i_next_section_offset; | |
1030 | section = 0; | |
1da177e4 | 1031 | |
c3ed85a3 | 1032 | while (nblocks) { |
1da177e4 LT |
1033 | /* If we are *way* beyond the end of the file, print a message. |
1034 | * Access beyond the end of the file up to the next page boundary | |
1035 | * is normal, however because of the way the page cache works. | |
1036 | * In this case, we just return 0 so that we can properly fill | |
1037 | * the page with useless information without generating any | |
1038 | * I/O errors. | |
1039 | */ | |
1040 | if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) { | |
fde214d4 JK |
1041 | printk(KERN_DEBUG "%s: block >= EOF (%lu, %llu)\n", |
1042 | __func__, b_off, | |
1043 | (unsigned long long)inode->i_size); | |
1da177e4 LT |
1044 | goto abort; |
1045 | } | |
c3ed85a3 | 1046 | |
fb50ae74 JRV |
1047 | /* On the last section, nextblk == 0, section size is likely to |
1048 | * exceed sect_size by a partial block, and access beyond the | |
1049 | * end of the file will reach beyond the section size, too. | |
1050 | */ | |
1051 | while (nextblk && (b_off >= (offset + sect_size))) { | |
1052 | struct inode *ninode; | |
1053 | ||
1054 | offset += sect_size; | |
1055 | ninode = isofs_iget(inode->i_sb, nextblk, nextoff); | |
c4386c83 DH |
1056 | if (IS_ERR(ninode)) { |
1057 | error = PTR_ERR(ninode); | |
fb50ae74 | 1058 | goto abort; |
c4386c83 | 1059 | } |
fb50ae74 JRV |
1060 | firstext = ISOFS_I(ninode)->i_first_extent; |
1061 | sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode); | |
1062 | nextblk = ISOFS_I(ninode)->i_next_section_block; | |
1063 | nextoff = ISOFS_I(ninode)->i_next_section_offset; | |
1064 | iput(ninode); | |
1065 | ||
1066 | if (++section > 100) { | |
c3ed85a3 DJ |
1067 | printk(KERN_DEBUG "%s: More than 100 file sections ?!?" |
1068 | " aborting...\n", __func__); | |
fde214d4 | 1069 | printk(KERN_DEBUG "%s: block=%lu firstext=%u sect_size=%u " |
c3ed85a3 | 1070 | "nextblk=%lu nextoff=%lu\n", __func__, |
fde214d4 | 1071 | b_off, firstext, (unsigned) sect_size, |
c3ed85a3 | 1072 | nextblk, nextoff); |
fb50ae74 | 1073 | goto abort; |
1da177e4 LT |
1074 | } |
1075 | } | |
c3ed85a3 DJ |
1076 | |
1077 | if (*bh) { | |
1da177e4 LT |
1078 | map_bh(*bh, inode->i_sb, firstext + b_off - offset); |
1079 | } else { | |
1080 | *bh = sb_getblk(inode->i_sb, firstext+b_off-offset); | |
c3ed85a3 | 1081 | if (!*bh) |
1da177e4 LT |
1082 | goto abort; |
1083 | } | |
1084 | bh++; /* Next buffer head */ | |
1085 | b_off++; /* Next buffer offset */ | |
1086 | nblocks--; | |
1087 | rv++; | |
1088 | } | |
1089 | ||
c4386c83 | 1090 | error = 0; |
1da177e4 | 1091 | abort: |
c4386c83 | 1092 | return rv != 0 ? rv : error; |
1da177e4 LT |
1093 | } |
1094 | ||
1095 | /* | |
1096 | * Used by the standard interfaces. | |
1097 | */ | |
1098 | static int isofs_get_block(struct inode *inode, sector_t iblock, | |
1099 | struct buffer_head *bh_result, int create) | |
1100 | { | |
c4386c83 DH |
1101 | int ret; |
1102 | ||
9eb7f2c6 | 1103 | if (create) { |
c3ed85a3 | 1104 | printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__); |
1da177e4 LT |
1105 | return -EROFS; |
1106 | } | |
1107 | ||
c4386c83 DH |
1108 | ret = isofs_get_blocks(inode, iblock, &bh_result, 1); |
1109 | return ret < 0 ? ret : 0; | |
1da177e4 LT |
1110 | } |
1111 | ||
1112 | static int isofs_bmap(struct inode *inode, sector_t block) | |
1113 | { | |
1114 | struct buffer_head dummy; | |
1115 | int error; | |
1116 | ||
1117 | dummy.b_state = 0; | |
1118 | dummy.b_blocknr = -1000; | |
1119 | error = isofs_get_block(inode, block, &dummy, 0); | |
1120 | if (!error) | |
1121 | return dummy.b_blocknr; | |
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | struct buffer_head *isofs_bread(struct inode *inode, sector_t block) | |
1126 | { | |
1127 | sector_t blknr = isofs_bmap(inode, block); | |
1128 | if (!blknr) | |
1129 | return NULL; | |
1130 | return sb_bread(inode->i_sb, blknr); | |
1131 | } | |
1132 | ||
1133 | static int isofs_readpage(struct file *file, struct page *page) | |
1134 | { | |
1135 | return block_read_full_page(page,isofs_get_block); | |
1136 | } | |
1137 | ||
1138 | static sector_t _isofs_bmap(struct address_space *mapping, sector_t block) | |
1139 | { | |
1140 | return generic_block_bmap(mapping,block,isofs_get_block); | |
1141 | } | |
1142 | ||
f5e54d6e | 1143 | static const struct address_space_operations isofs_aops = { |
1da177e4 LT |
1144 | .readpage = isofs_readpage, |
1145 | .sync_page = block_sync_page, | |
1146 | .bmap = _isofs_bmap | |
1147 | }; | |
1148 | ||
9eb7f2c6 | 1149 | static int isofs_read_level3_size(struct inode *inode) |
1da177e4 LT |
1150 | { |
1151 | unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); | |
1152 | int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra; | |
c3ed85a3 | 1153 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1154 | unsigned long block, offset, block_saved, offset_saved; |
1155 | int i = 0; | |
1156 | int more_entries = 0; | |
c3ed85a3 | 1157 | struct iso_directory_record *tmpde = NULL; |
1da177e4 LT |
1158 | struct iso_inode_info *ei = ISOFS_I(inode); |
1159 | ||
1160 | inode->i_size = 0; | |
1161 | ||
1162 | /* The first 16 blocks are reserved as the System Area. Thus, | |
1163 | * no inodes can appear in block 0. We use this to flag that | |
1164 | * this is the last section. */ | |
1165 | ei->i_next_section_block = 0; | |
1166 | ei->i_next_section_offset = 0; | |
1167 | ||
1168 | block = ei->i_iget5_block; | |
1169 | offset = ei->i_iget5_offset; | |
1170 | ||
1171 | do { | |
c3ed85a3 | 1172 | struct iso_directory_record *de; |
1da177e4 LT |
1173 | unsigned int de_len; |
1174 | ||
1175 | if (!bh) { | |
1176 | bh = sb_bread(inode->i_sb, block); | |
1177 | if (!bh) | |
1178 | goto out_noread; | |
1179 | } | |
1180 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
1181 | de_len = *(unsigned char *) de; | |
1182 | ||
1183 | if (de_len == 0) { | |
1184 | brelse(bh); | |
1185 | bh = NULL; | |
1186 | ++block; | |
1187 | offset = 0; | |
1188 | continue; | |
1189 | } | |
1190 | ||
1191 | block_saved = block; | |
1192 | offset_saved = offset; | |
1193 | offset += de_len; | |
1194 | ||
1195 | /* Make sure we have a full directory entry */ | |
1196 | if (offset >= bufsize) { | |
1197 | int slop = bufsize - offset + de_len; | |
1198 | if (!tmpde) { | |
1199 | tmpde = kmalloc(256, GFP_KERNEL); | |
1200 | if (!tmpde) | |
1201 | goto out_nomem; | |
1202 | } | |
1203 | memcpy(tmpde, de, slop); | |
1204 | offset &= bufsize - 1; | |
1205 | block++; | |
1206 | brelse(bh); | |
1207 | bh = NULL; | |
1208 | if (offset) { | |
1209 | bh = sb_bread(inode->i_sb, block); | |
1210 | if (!bh) | |
1211 | goto out_noread; | |
9eb7f2c6 | 1212 | memcpy((void *)tmpde+slop, bh->b_data, offset); |
1da177e4 LT |
1213 | } |
1214 | de = tmpde; | |
1215 | } | |
1216 | ||
1217 | inode->i_size += isonum_733(de->size); | |
1218 | if (i == 1) { | |
1219 | ei->i_next_section_block = block_saved; | |
1220 | ei->i_next_section_offset = offset_saved; | |
1221 | } | |
1222 | ||
1223 | more_entries = de->flags[-high_sierra] & 0x80; | |
1224 | ||
1225 | i++; | |
9eb7f2c6 | 1226 | if (i > 100) |
1da177e4 | 1227 | goto out_toomany; |
9eb7f2c6 | 1228 | } while (more_entries); |
1da177e4 | 1229 | out: |
9eb7f2c6 | 1230 | kfree(tmpde); |
1da177e4 LT |
1231 | if (bh) |
1232 | brelse(bh); | |
1233 | return 0; | |
1234 | ||
1235 | out_nomem: | |
1236 | if (bh) | |
1237 | brelse(bh); | |
1238 | return -ENOMEM; | |
1239 | ||
1240 | out_noread: | |
1241 | printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block); | |
f99d49ad | 1242 | kfree(tmpde); |
1da177e4 LT |
1243 | return -EIO; |
1244 | ||
1245 | out_toomany: | |
c3ed85a3 DJ |
1246 | printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n" |
1247 | "isofs_read_level3_size: inode=%lu\n", | |
1248 | __func__, inode->i_ino); | |
1da177e4 LT |
1249 | goto out; |
1250 | } | |
1251 | ||
c4386c83 | 1252 | static int isofs_read_inode(struct inode *inode) |
1da177e4 LT |
1253 | { |
1254 | struct super_block *sb = inode->i_sb; | |
1255 | struct isofs_sb_info *sbi = ISOFS_SB(sb); | |
1256 | unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); | |
1257 | unsigned long block; | |
1258 | int high_sierra = sbi->s_high_sierra; | |
c3ed85a3 DJ |
1259 | struct buffer_head *bh = NULL; |
1260 | struct iso_directory_record *de; | |
1261 | struct iso_directory_record *tmpde = NULL; | |
1da177e4 LT |
1262 | unsigned int de_len; |
1263 | unsigned long offset; | |
1264 | struct iso_inode_info *ei = ISOFS_I(inode); | |
c4386c83 | 1265 | int ret = -EIO; |
1da177e4 LT |
1266 | |
1267 | block = ei->i_iget5_block; | |
1268 | bh = sb_bread(inode->i_sb, block); | |
1269 | if (!bh) | |
1270 | goto out_badread; | |
1271 | ||
1272 | offset = ei->i_iget5_offset; | |
1273 | ||
1274 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
1275 | de_len = *(unsigned char *) de; | |
1276 | ||
1277 | if (offset + de_len > bufsize) { | |
1278 | int frag1 = bufsize - offset; | |
1279 | ||
1280 | tmpde = kmalloc(de_len, GFP_KERNEL); | |
1281 | if (tmpde == NULL) { | |
c3ed85a3 | 1282 | printk(KERN_INFO "%s: out of memory\n", __func__); |
c4386c83 | 1283 | ret = -ENOMEM; |
1da177e4 LT |
1284 | goto fail; |
1285 | } | |
1286 | memcpy(tmpde, bh->b_data + offset, frag1); | |
1287 | brelse(bh); | |
1288 | bh = sb_bread(inode->i_sb, ++block); | |
1289 | if (!bh) | |
1290 | goto out_badread; | |
1291 | memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1); | |
1292 | de = tmpde; | |
1293 | } | |
1294 | ||
1295 | inode->i_ino = isofs_get_ino(ei->i_iget5_block, | |
c3ed85a3 DJ |
1296 | ei->i_iget5_offset, |
1297 | ISOFS_BUFFER_BITS(inode)); | |
1da177e4 LT |
1298 | |
1299 | /* Assume it is a normal-format file unless told otherwise */ | |
1300 | ei->i_file_format = isofs_file_normal; | |
1301 | ||
1302 | if (de->flags[-high_sierra] & 2) { | |
52b680c8 JK |
1303 | if (sbi->s_dmode != ISOFS_INVALID_MODE) |
1304 | inode->i_mode = S_IFDIR | sbi->s_dmode; | |
1305 | else | |
1306 | inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
c3ed85a3 DJ |
1307 | inode->i_nlink = 1; /* |
1308 | * Set to 1. We know there are 2, but | |
1309 | * the find utility tries to optimize | |
1310 | * if it is 2, and it screws up. It is | |
1311 | * easier to give 1 which tells find to | |
1312 | * do it the hard way. | |
1313 | */ | |
1da177e4 | 1314 | } else { |
52b680c8 JK |
1315 | if (sbi->s_fmode != ISOFS_INVALID_MODE) { |
1316 | inode->i_mode = S_IFREG | sbi->s_fmode; | |
1317 | } else { | |
1318 | /* | |
1319 | * Set default permissions: r-x for all. The disc | |
1320 | * could be shared with DOS machines so virtually | |
1321 | * anything could be a valid executable. | |
1322 | */ | |
1323 | inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO; | |
1324 | } | |
1da177e4 | 1325 | inode->i_nlink = 1; |
1da177e4 LT |
1326 | } |
1327 | inode->i_uid = sbi->s_uid; | |
1328 | inode->i_gid = sbi->s_gid; | |
ba52de12 | 1329 | inode->i_blocks = 0; |
1da177e4 LT |
1330 | |
1331 | ei->i_format_parm[0] = 0; | |
1332 | ei->i_format_parm[1] = 0; | |
1333 | ei->i_format_parm[2] = 0; | |
1334 | ||
c3ed85a3 | 1335 | ei->i_section_size = isonum_733(de->size); |
9eb7f2c6 | 1336 | if (de->flags[-high_sierra] & 0x80) { |
c4386c83 DH |
1337 | ret = isofs_read_level3_size(inode); |
1338 | if (ret < 0) | |
c3ed85a3 | 1339 | goto fail; |
c4386c83 | 1340 | ret = -EIO; |
1da177e4 LT |
1341 | } else { |
1342 | ei->i_next_section_block = 0; | |
1343 | ei->i_next_section_offset = 0; | |
c3ed85a3 | 1344 | inode->i_size = isonum_733(de->size); |
1da177e4 LT |
1345 | } |
1346 | ||
1347 | /* | |
1348 | * Some dipshit decided to store some other bit of information | |
1349 | * in the high byte of the file length. Truncate size in case | |
1350 | * this CDROM was mounted with the cruft option. | |
1351 | */ | |
1352 | ||
5404ac8e | 1353 | if (sbi->s_cruft) |
1da177e4 LT |
1354 | inode->i_size &= 0x00ffffff; |
1355 | ||
1356 | if (de->interleave[0]) { | |
c3ed85a3 | 1357 | printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n"); |
1da177e4 LT |
1358 | inode->i_size = 0; |
1359 | } | |
1360 | ||
1361 | /* I have no idea what file_unit_size is used for, so | |
1362 | we will flag it for now */ | |
1363 | if (de->file_unit_size[0] != 0) { | |
c3ed85a3 DJ |
1364 | printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n", |
1365 | inode->i_ino); | |
1da177e4 LT |
1366 | } |
1367 | ||
1368 | /* I have no idea what other flag bits are used for, so | |
1369 | we will flag it for now */ | |
1370 | #ifdef DEBUG | |
1371 | if((de->flags[-high_sierra] & ~2)!= 0){ | |
c3ed85a3 DJ |
1372 | printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file " |
1373 | "(%ld %x).\n", | |
1374 | inode->i_ino, de->flags[-high_sierra]); | |
1da177e4 LT |
1375 | } |
1376 | #endif | |
1377 | ||
1378 | inode->i_mtime.tv_sec = | |
1379 | inode->i_atime.tv_sec = | |
1380 | inode->i_ctime.tv_sec = iso_date(de->date, high_sierra); | |
1381 | inode->i_mtime.tv_nsec = | |
1382 | inode->i_atime.tv_nsec = | |
1383 | inode->i_ctime.tv_nsec = 0; | |
1384 | ||
c3ed85a3 DJ |
1385 | ei->i_first_extent = (isonum_733(de->extent) + |
1386 | isonum_711(de->ext_attr_length)); | |
1da177e4 LT |
1387 | |
1388 | /* Set the number of blocks for stat() - should be done before RR */ | |
c3ed85a3 | 1389 | inode->i_blocks = (inode->i_size + 511) >> 9; |
1da177e4 LT |
1390 | |
1391 | /* | |
1392 | * Now test for possible Rock Ridge extensions which will override | |
1393 | * some of these numbers in the inode structure. | |
1394 | */ | |
1395 | ||
1396 | if (!high_sierra) { | |
1397 | parse_rock_ridge_inode(de, inode); | |
1398 | /* if we want uid/gid set, override the rock ridge setting */ | |
5c4a656b JK |
1399 | if (sbi->s_uid_set) |
1400 | inode->i_uid = sbi->s_uid; | |
1401 | if (sbi->s_gid_set) | |
1402 | inode->i_gid = sbi->s_gid; | |
1da177e4 | 1403 | } |
52b680c8 JK |
1404 | /* Now set final access rights if overriding rock ridge setting */ |
1405 | if (S_ISDIR(inode->i_mode) && sbi->s_overriderockperm && | |
1406 | sbi->s_dmode != ISOFS_INVALID_MODE) | |
1407 | inode->i_mode = S_IFDIR | sbi->s_dmode; | |
1408 | if (S_ISREG(inode->i_mode) && sbi->s_overriderockperm && | |
1409 | sbi->s_fmode != ISOFS_INVALID_MODE) | |
1410 | inode->i_mode = S_IFREG | sbi->s_fmode; | |
1da177e4 LT |
1411 | |
1412 | /* Install the inode operations vector */ | |
1413 | if (S_ISREG(inode->i_mode)) { | |
1414 | inode->i_fop = &generic_ro_fops; | |
c3ed85a3 | 1415 | switch (ei->i_file_format) { |
1da177e4 LT |
1416 | #ifdef CONFIG_ZISOFS |
1417 | case isofs_file_compressed: | |
1418 | inode->i_data.a_ops = &zisofs_aops; | |
1419 | break; | |
1420 | #endif | |
1421 | default: | |
1422 | inode->i_data.a_ops = &isofs_aops; | |
1423 | break; | |
1424 | } | |
1425 | } else if (S_ISDIR(inode->i_mode)) { | |
1426 | inode->i_op = &isofs_dir_inode_operations; | |
1427 | inode->i_fop = &isofs_dir_operations; | |
1428 | } else if (S_ISLNK(inode->i_mode)) { | |
1429 | inode->i_op = &page_symlink_inode_operations; | |
1430 | inode->i_data.a_ops = &isofs_symlink_aops; | |
1431 | } else | |
1432 | /* XXX - parse_rock_ridge_inode() had already set i_rdev. */ | |
1433 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1434 | ||
c4386c83 | 1435 | ret = 0; |
9eb7f2c6 | 1436 | out: |
f99d49ad | 1437 | kfree(tmpde); |
1da177e4 LT |
1438 | if (bh) |
1439 | brelse(bh); | |
c4386c83 | 1440 | return ret; |
1da177e4 | 1441 | |
9eb7f2c6 | 1442 | out_badread: |
1da177e4 | 1443 | printk(KERN_WARNING "ISOFS: unable to read i-node block\n"); |
9eb7f2c6 | 1444 | fail: |
1da177e4 LT |
1445 | goto out; |
1446 | } | |
1447 | ||
1448 | struct isofs_iget5_callback_data { | |
1449 | unsigned long block; | |
1450 | unsigned long offset; | |
1451 | }; | |
1452 | ||
1453 | static int isofs_iget5_test(struct inode *ino, void *data) | |
1454 | { | |
1455 | struct iso_inode_info *i = ISOFS_I(ino); | |
1456 | struct isofs_iget5_callback_data *d = | |
1457 | (struct isofs_iget5_callback_data*)data; | |
1458 | return (i->i_iget5_block == d->block) | |
c3ed85a3 | 1459 | && (i->i_iget5_offset == d->offset); |
1da177e4 LT |
1460 | } |
1461 | ||
1462 | static int isofs_iget5_set(struct inode *ino, void *data) | |
1463 | { | |
1464 | struct iso_inode_info *i = ISOFS_I(ino); | |
1465 | struct isofs_iget5_callback_data *d = | |
1466 | (struct isofs_iget5_callback_data*)data; | |
1467 | i->i_iget5_block = d->block; | |
1468 | i->i_iget5_offset = d->offset; | |
1469 | return 0; | |
1470 | } | |
1471 | ||
1472 | /* Store, in the inode's containing structure, the block and block | |
1473 | * offset that point to the underlying meta-data for the inode. The | |
1474 | * code below is otherwise similar to the iget() code in | |
1475 | * include/linux/fs.h */ | |
1476 | struct inode *isofs_iget(struct super_block *sb, | |
1477 | unsigned long block, | |
1478 | unsigned long offset) | |
1479 | { | |
1480 | unsigned long hashval; | |
1481 | struct inode *inode; | |
1482 | struct isofs_iget5_callback_data data; | |
c4386c83 | 1483 | long ret; |
1da177e4 LT |
1484 | |
1485 | if (offset >= 1ul << sb->s_blocksize_bits) | |
c4386c83 | 1486 | return ERR_PTR(-EINVAL); |
1da177e4 LT |
1487 | |
1488 | data.block = block; | |
1489 | data.offset = offset; | |
1490 | ||
1491 | hashval = (block << sb->s_blocksize_bits) | offset; | |
1492 | ||
9eb7f2c6 | 1493 | inode = iget5_locked(sb, hashval, &isofs_iget5_test, |
c3ed85a3 | 1494 | &isofs_iget5_set, &data); |
1da177e4 | 1495 | |
c4386c83 DH |
1496 | if (!inode) |
1497 | return ERR_PTR(-ENOMEM); | |
1498 | ||
1499 | if (inode->i_state & I_NEW) { | |
1500 | ret = isofs_read_inode(inode); | |
1501 | if (ret < 0) { | |
1502 | iget_failed(inode); | |
1503 | inode = ERR_PTR(ret); | |
1504 | } else { | |
1505 | unlock_new_inode(inode); | |
1506 | } | |
1da177e4 LT |
1507 | } |
1508 | ||
1509 | return inode; | |
1510 | } | |
1511 | ||
152a0836 AV |
1512 | static struct dentry *isofs_mount(struct file_system_type *fs_type, |
1513 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1514 | { |
152a0836 | 1515 | return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super); |
1da177e4 LT |
1516 | } |
1517 | ||
1518 | static struct file_system_type iso9660_fs_type = { | |
1519 | .owner = THIS_MODULE, | |
1520 | .name = "iso9660", | |
152a0836 | 1521 | .mount = isofs_mount, |
1da177e4 LT |
1522 | .kill_sb = kill_block_super, |
1523 | .fs_flags = FS_REQUIRES_DEV, | |
1524 | }; | |
1525 | ||
1526 | static int __init init_iso9660_fs(void) | |
1527 | { | |
1528 | int err = init_inodecache(); | |
1529 | if (err) | |
1530 | goto out; | |
1531 | #ifdef CONFIG_ZISOFS | |
1532 | err = zisofs_init(); | |
1533 | if (err) | |
1534 | goto out1; | |
1535 | #endif | |
1536 | err = register_filesystem(&iso9660_fs_type); | |
1537 | if (err) | |
1538 | goto out2; | |
1539 | return 0; | |
1540 | out2: | |
1541 | #ifdef CONFIG_ZISOFS | |
1542 | zisofs_cleanup(); | |
1543 | out1: | |
1544 | #endif | |
1545 | destroy_inodecache(); | |
1546 | out: | |
1547 | return err; | |
1548 | } | |
1549 | ||
1550 | static void __exit exit_iso9660_fs(void) | |
1551 | { | |
1552 | unregister_filesystem(&iso9660_fs_type); | |
1553 | #ifdef CONFIG_ZISOFS | |
1554 | zisofs_cleanup(); | |
1555 | #endif | |
1556 | destroy_inodecache(); | |
1557 | } | |
1558 | ||
1559 | module_init(init_iso9660_fs) | |
1560 | module_exit(exit_iso9660_fs) | |
1561 | MODULE_LICENSE("GPL"); | |
1562 | /* Actual filesystem name is iso9660, as requested in filesystems.c */ | |
1563 | MODULE_ALIAS("iso9660"); |