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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 | ||
b1e6a015 NP |
29 | static int isofs_hashi(const struct dentry *parent, const struct inode *inode, |
30 | struct qstr *qstr); | |
31 | static int isofs_hash(const struct dentry *parent, const struct inode *inode, | |
32 | struct qstr *qstr); | |
621e155a NP |
33 | static int isofs_dentry_cmpi(const struct dentry *parent, |
34 | const struct inode *pinode, | |
35 | const struct dentry *dentry, const struct inode *inode, | |
36 | unsigned int len, const char *str, const struct qstr *name); | |
37 | static int isofs_dentry_cmp(const struct dentry *parent, | |
38 | const struct inode *pinode, | |
39 | const struct dentry *dentry, const struct inode *inode, | |
40 | unsigned int len, const char *str, const struct qstr *name); | |
1da177e4 LT |
41 | |
42 | #ifdef CONFIG_JOLIET | |
b1e6a015 NP |
43 | static int isofs_hashi_ms(const struct dentry *parent, const struct inode *inode, |
44 | struct qstr *qstr); | |
45 | static int isofs_hash_ms(const struct dentry *parent, const struct inode *inode, | |
46 | struct qstr *qstr); | |
621e155a NP |
47 | static int isofs_dentry_cmpi_ms(const struct dentry *parent, |
48 | const struct inode *pinode, | |
49 | const struct dentry *dentry, const struct inode *inode, | |
50 | unsigned int len, const char *str, const struct qstr *name); | |
51 | static int isofs_dentry_cmp_ms(const struct dentry *parent, | |
52 | const struct inode *pinode, | |
53 | const struct dentry *dentry, const struct inode *inode, | |
54 | unsigned int len, const char *str, const struct qstr *name); | |
1da177e4 LT |
55 | #endif |
56 | ||
57 | static void isofs_put_super(struct super_block *sb) | |
58 | { | |
59 | struct isofs_sb_info *sbi = ISOFS_SB(sb); | |
6cfd0148 | 60 | |
1da177e4 | 61 | #ifdef CONFIG_JOLIET |
6d729e44 | 62 | unload_nls(sbi->s_nls_iocharset); |
1da177e4 LT |
63 | #endif |
64 | ||
1da177e4 LT |
65 | kfree(sbi); |
66 | sb->s_fs_info = NULL; | |
67 | return; | |
68 | } | |
69 | ||
c4386c83 | 70 | static int isofs_read_inode(struct inode *); |
726c3342 | 71 | static int isofs_statfs (struct dentry *, struct kstatfs *); |
1da177e4 | 72 | |
e18b890b | 73 | static struct kmem_cache *isofs_inode_cachep; |
1da177e4 LT |
74 | |
75 | static struct inode *isofs_alloc_inode(struct super_block *sb) | |
76 | { | |
77 | struct iso_inode_info *ei; | |
e94b1766 | 78 | ei = kmem_cache_alloc(isofs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
79 | if (!ei) |
80 | return NULL; | |
81 | return &ei->vfs_inode; | |
82 | } | |
83 | ||
fa0d7e3d | 84 | static void isofs_i_callback(struct rcu_head *head) |
1da177e4 | 85 | { |
fa0d7e3d NP |
86 | struct inode *inode = container_of(head, struct inode, i_rcu); |
87 | INIT_LIST_HEAD(&inode->i_dentry); | |
1da177e4 LT |
88 | kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode)); |
89 | } | |
90 | ||
fa0d7e3d NP |
91 | static void isofs_destroy_inode(struct inode *inode) |
92 | { | |
93 | call_rcu(&inode->i_rcu, isofs_i_callback); | |
94 | } | |
95 | ||
51cc5068 | 96 | static void init_once(void *foo) |
1da177e4 | 97 | { |
9eb7f2c6 | 98 | struct iso_inode_info *ei = foo; |
1da177e4 | 99 | |
a35afb83 | 100 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 101 | } |
c3ed85a3 | 102 | |
1da177e4 LT |
103 | static int init_inodecache(void) |
104 | { | |
105 | isofs_inode_cachep = kmem_cache_create("isofs_inode_cache", | |
c3ed85a3 DJ |
106 | sizeof(struct iso_inode_info), |
107 | 0, (SLAB_RECLAIM_ACCOUNT| | |
108 | SLAB_MEM_SPREAD), | |
20c2df83 | 109 | init_once); |
1da177e4 LT |
110 | if (isofs_inode_cachep == NULL) |
111 | return -ENOMEM; | |
112 | return 0; | |
113 | } | |
114 | ||
115 | static void destroy_inodecache(void) | |
116 | { | |
1a1d92c1 | 117 | kmem_cache_destroy(isofs_inode_cachep); |
1da177e4 LT |
118 | } |
119 | ||
120 | static int isofs_remount(struct super_block *sb, int *flags, char *data) | |
121 | { | |
122 | /* we probably want a lot more here */ | |
123 | *flags |= MS_RDONLY; | |
124 | return 0; | |
125 | } | |
126 | ||
ee9b6d61 | 127 | static const struct super_operations isofs_sops = { |
1da177e4 LT |
128 | .alloc_inode = isofs_alloc_inode, |
129 | .destroy_inode = isofs_destroy_inode, | |
1da177e4 LT |
130 | .put_super = isofs_put_super, |
131 | .statfs = isofs_statfs, | |
132 | .remount_fs = isofs_remount, | |
d0132eea | 133 | .show_options = generic_show_options, |
1da177e4 LT |
134 | }; |
135 | ||
136 | ||
e16404ed | 137 | static const struct dentry_operations isofs_dentry_ops[] = { |
1da177e4 LT |
138 | { |
139 | .d_hash = isofs_hash, | |
140 | .d_compare = isofs_dentry_cmp, | |
141 | }, | |
142 | { | |
143 | .d_hash = isofs_hashi, | |
144 | .d_compare = isofs_dentry_cmpi, | |
145 | }, | |
146 | #ifdef CONFIG_JOLIET | |
147 | { | |
148 | .d_hash = isofs_hash_ms, | |
149 | .d_compare = isofs_dentry_cmp_ms, | |
150 | }, | |
151 | { | |
152 | .d_hash = isofs_hashi_ms, | |
153 | .d_compare = isofs_dentry_cmpi_ms, | |
9eb7f2c6 | 154 | }, |
1da177e4 LT |
155 | #endif |
156 | }; | |
157 | ||
158 | struct iso9660_options{ | |
5404ac8e | 159 | unsigned int rock:1; |
8711c67b | 160 | unsigned int joliet:1; |
5404ac8e JK |
161 | unsigned int cruft:1; |
162 | unsigned int hide:1; | |
163 | unsigned int showassoc:1; | |
164 | unsigned int nocompress:1; | |
165 | unsigned int overriderockperm:1; | |
166 | unsigned int uid_set:1; | |
167 | unsigned int gid_set:1; | |
168 | unsigned int utf8:1; | |
169 | unsigned char map; | |
1da177e4 LT |
170 | unsigned char check; |
171 | unsigned int blocksize; | |
9b7880e7 JK |
172 | mode_t fmode; |
173 | mode_t dmode; | |
1da177e4 LT |
174 | gid_t gid; |
175 | uid_t uid; | |
176 | char *iocharset; | |
c3ed85a3 DJ |
177 | /* LVE */ |
178 | s32 session; | |
179 | s32 sbsector; | |
1da177e4 LT |
180 | }; |
181 | ||
182 | /* | |
183 | * Compute the hash for the isofs name corresponding to the dentry. | |
184 | */ | |
185 | static int | |
b1e6a015 | 186 | isofs_hash_common(const struct dentry *dentry, struct qstr *qstr, int ms) |
1da177e4 LT |
187 | { |
188 | const char *name; | |
189 | int len; | |
190 | ||
191 | len = qstr->len; | |
192 | name = qstr->name; | |
193 | if (ms) { | |
194 | while (len && name[len-1] == '.') | |
195 | len--; | |
196 | } | |
197 | ||
198 | qstr->hash = full_name_hash(name, len); | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | /* | |
204 | * Compute the hash for the isofs name corresponding to the dentry. | |
205 | */ | |
206 | static int | |
b1e6a015 | 207 | isofs_hashi_common(const struct dentry *dentry, struct qstr *qstr, int ms) |
1da177e4 LT |
208 | { |
209 | const char *name; | |
210 | int len; | |
211 | char c; | |
212 | unsigned long hash; | |
213 | ||
214 | len = qstr->len; | |
215 | name = qstr->name; | |
216 | if (ms) { | |
217 | while (len && name[len-1] == '.') | |
218 | len--; | |
219 | } | |
220 | ||
221 | hash = init_name_hash(); | |
222 | while (len--) { | |
223 | c = tolower(*name++); | |
f17e121f | 224 | hash = partial_name_hash(c, hash); |
1da177e4 LT |
225 | } |
226 | qstr->hash = end_name_hash(hash); | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | /* | |
621e155a | 232 | * Compare of two isofs names. |
1da177e4 | 233 | */ |
621e155a NP |
234 | static int isofs_dentry_cmp_common( |
235 | unsigned int len, const char *str, | |
236 | const struct qstr *name, int ms, int ci) | |
1da177e4 LT |
237 | { |
238 | int alen, blen; | |
239 | ||
240 | /* A filename cannot end in '.' or we treat it like it has none */ | |
621e155a NP |
241 | alen = name->len; |
242 | blen = len; | |
1da177e4 | 243 | if (ms) { |
621e155a | 244 | while (alen && name->name[alen-1] == '.') |
1da177e4 | 245 | alen--; |
621e155a | 246 | while (blen && str[blen-1] == '.') |
1da177e4 LT |
247 | blen--; |
248 | } | |
249 | if (alen == blen) { | |
621e155a NP |
250 | if (ci) { |
251 | if (strnicmp(name->name, str, alen) == 0) | |
252 | return 0; | |
253 | } else { | |
254 | if (strncmp(name->name, str, alen) == 0) | |
255 | return 0; | |
256 | } | |
1da177e4 LT |
257 | } |
258 | return 1; | |
259 | } | |
260 | ||
261 | static int | |
b1e6a015 NP |
262 | isofs_hash(const struct dentry *dentry, const struct inode *inode, |
263 | struct qstr *qstr) | |
1da177e4 LT |
264 | { |
265 | return isofs_hash_common(dentry, qstr, 0); | |
266 | } | |
267 | ||
268 | static int | |
b1e6a015 NP |
269 | isofs_hashi(const struct dentry *dentry, const struct inode *inode, |
270 | struct qstr *qstr) | |
1da177e4 LT |
271 | { |
272 | return isofs_hashi_common(dentry, qstr, 0); | |
273 | } | |
274 | ||
275 | static int | |
621e155a NP |
276 | isofs_dentry_cmp(const struct dentry *parent, const struct inode *pinode, |
277 | const struct dentry *dentry, const struct inode *inode, | |
278 | unsigned int len, const char *str, const struct qstr *name) | |
1da177e4 | 279 | { |
621e155a | 280 | return isofs_dentry_cmp_common(len, str, name, 0, 0); |
1da177e4 LT |
281 | } |
282 | ||
283 | static int | |
621e155a NP |
284 | isofs_dentry_cmpi(const struct dentry *parent, const struct inode *pinode, |
285 | const struct dentry *dentry, const struct inode *inode, | |
286 | unsigned int len, const char *str, const struct qstr *name) | |
1da177e4 | 287 | { |
621e155a | 288 | return isofs_dentry_cmp_common(len, str, name, 0, 1); |
1da177e4 LT |
289 | } |
290 | ||
291 | #ifdef CONFIG_JOLIET | |
292 | static int | |
b1e6a015 NP |
293 | isofs_hash_ms(const struct dentry *dentry, const struct inode *inode, |
294 | struct qstr *qstr) | |
1da177e4 LT |
295 | { |
296 | return isofs_hash_common(dentry, qstr, 1); | |
297 | } | |
298 | ||
299 | static int | |
b1e6a015 NP |
300 | isofs_hashi_ms(const struct dentry *dentry, const struct inode *inode, |
301 | struct qstr *qstr) | |
1da177e4 LT |
302 | { |
303 | return isofs_hashi_common(dentry, qstr, 1); | |
304 | } | |
305 | ||
306 | static int | |
621e155a NP |
307 | isofs_dentry_cmp_ms(const struct dentry *parent, const struct inode *pinode, |
308 | const struct dentry *dentry, const struct inode *inode, | |
309 | unsigned int len, const char *str, const struct qstr *name) | |
1da177e4 | 310 | { |
621e155a | 311 | return isofs_dentry_cmp_common(len, str, name, 1, 0); |
1da177e4 LT |
312 | } |
313 | ||
314 | static int | |
621e155a NP |
315 | isofs_dentry_cmpi_ms(const struct dentry *parent, const struct inode *pinode, |
316 | const struct dentry *dentry, const struct inode *inode, | |
317 | unsigned int len, const char *str, const struct qstr *name) | |
1da177e4 | 318 | { |
621e155a | 319 | return isofs_dentry_cmp_common(len, str, name, 1, 1); |
1da177e4 LT |
320 | } |
321 | #endif | |
322 | ||
323 | enum { | |
324 | Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore, | |
325 | Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet, | |
326 | Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err, | |
52b680c8 | 327 | Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode, Opt_overriderockperm, |
1da177e4 LT |
328 | }; |
329 | ||
a447c093 | 330 | static const match_table_t tokens = { |
1da177e4 LT |
331 | {Opt_norock, "norock"}, |
332 | {Opt_nojoliet, "nojoliet"}, | |
333 | {Opt_unhide, "unhide"}, | |
9769f4eb JW |
334 | {Opt_hide, "hide"}, |
335 | {Opt_showassoc, "showassoc"}, | |
1da177e4 LT |
336 | {Opt_cruft, "cruft"}, |
337 | {Opt_utf8, "utf8"}, | |
338 | {Opt_iocharset, "iocharset=%s"}, | |
339 | {Opt_map_a, "map=acorn"}, | |
340 | {Opt_map_a, "map=a"}, | |
341 | {Opt_map_n, "map=normal"}, | |
342 | {Opt_map_n, "map=n"}, | |
343 | {Opt_map_o, "map=off"}, | |
344 | {Opt_map_o, "map=o"}, | |
345 | {Opt_session, "session=%u"}, | |
346 | {Opt_sb, "sbsector=%u"}, | |
347 | {Opt_check_r, "check=relaxed"}, | |
348 | {Opt_check_r, "check=r"}, | |
349 | {Opt_check_s, "check=strict"}, | |
350 | {Opt_check_s, "check=s"}, | |
351 | {Opt_uid, "uid=%u"}, | |
352 | {Opt_gid, "gid=%u"}, | |
353 | {Opt_mode, "mode=%u"}, | |
9b7880e7 | 354 | {Opt_dmode, "dmode=%u"}, |
52b680c8 | 355 | {Opt_overriderockperm, "overriderockperm"}, |
1da177e4 LT |
356 | {Opt_block, "block=%u"}, |
357 | {Opt_ignore, "conv=binary"}, | |
358 | {Opt_ignore, "conv=b"}, | |
359 | {Opt_ignore, "conv=text"}, | |
360 | {Opt_ignore, "conv=t"}, | |
361 | {Opt_ignore, "conv=mtext"}, | |
362 | {Opt_ignore, "conv=m"}, | |
363 | {Opt_ignore, "conv=auto"}, | |
364 | {Opt_ignore, "conv=a"}, | |
365 | {Opt_nocompress, "nocompress"}, | |
366 | {Opt_err, NULL} | |
367 | }; | |
368 | ||
9eb7f2c6 | 369 | static int parse_options(char *options, struct iso9660_options *popt) |
1da177e4 LT |
370 | { |
371 | char *p; | |
372 | int option; | |
373 | ||
374 | popt->map = 'n'; | |
5404ac8e JK |
375 | popt->rock = 1; |
376 | popt->joliet = 1; | |
377 | popt->cruft = 0; | |
378 | popt->hide = 0; | |
379 | popt->showassoc = 0; | |
1da177e4 LT |
380 | popt->check = 'u'; /* unset */ |
381 | popt->nocompress = 0; | |
382 | popt->blocksize = 1024; | |
52b680c8 | 383 | popt->fmode = popt->dmode = ISOFS_INVALID_MODE; |
5c4a656b JK |
384 | popt->uid_set = 0; |
385 | popt->gid_set = 0; | |
1da177e4 LT |
386 | popt->gid = 0; |
387 | popt->uid = 0; | |
388 | popt->iocharset = NULL; | |
389 | popt->utf8 = 0; | |
52b680c8 | 390 | popt->overriderockperm = 0; |
1da177e4 LT |
391 | popt->session=-1; |
392 | popt->sbsector=-1; | |
393 | if (!options) | |
394 | return 1; | |
395 | ||
396 | while ((p = strsep(&options, ",")) != NULL) { | |
397 | int token; | |
398 | substring_t args[MAX_OPT_ARGS]; | |
399 | unsigned n; | |
400 | ||
401 | if (!*p) | |
402 | continue; | |
403 | ||
404 | token = match_token(p, tokens, args); | |
405 | switch (token) { | |
406 | case Opt_norock: | |
5404ac8e | 407 | popt->rock = 0; |
1da177e4 LT |
408 | break; |
409 | case Opt_nojoliet: | |
5404ac8e | 410 | popt->joliet = 0; |
1da177e4 | 411 | break; |
9769f4eb | 412 | case Opt_hide: |
5404ac8e | 413 | popt->hide = 1; |
9769f4eb | 414 | break; |
1da177e4 | 415 | case Opt_unhide: |
9769f4eb | 416 | case Opt_showassoc: |
5404ac8e | 417 | popt->showassoc = 1; |
1da177e4 LT |
418 | break; |
419 | case Opt_cruft: | |
5404ac8e | 420 | popt->cruft = 1; |
1da177e4 LT |
421 | break; |
422 | case Opt_utf8: | |
423 | popt->utf8 = 1; | |
424 | break; | |
425 | #ifdef CONFIG_JOLIET | |
426 | case Opt_iocharset: | |
427 | popt->iocharset = match_strdup(&args[0]); | |
428 | break; | |
429 | #endif | |
430 | case Opt_map_a: | |
431 | popt->map = 'a'; | |
432 | break; | |
433 | case Opt_map_o: | |
434 | popt->map = 'o'; | |
435 | break; | |
436 | case Opt_map_n: | |
437 | popt->map = 'n'; | |
438 | break; | |
439 | case Opt_session: | |
440 | if (match_int(&args[0], &option)) | |
441 | return 0; | |
442 | n = option; | |
443 | if (n > 99) | |
444 | return 0; | |
445 | popt->session = n + 1; | |
446 | break; | |
447 | case Opt_sb: | |
448 | if (match_int(&args[0], &option)) | |
449 | return 0; | |
450 | popt->sbsector = option; | |
451 | break; | |
452 | case Opt_check_r: | |
453 | popt->check = 'r'; | |
454 | break; | |
455 | case Opt_check_s: | |
456 | popt->check = 's'; | |
457 | break; | |
458 | case Opt_ignore: | |
459 | break; | |
460 | case Opt_uid: | |
461 | if (match_int(&args[0], &option)) | |
462 | return 0; | |
463 | popt->uid = option; | |
5c4a656b | 464 | popt->uid_set = 1; |
1da177e4 LT |
465 | break; |
466 | case Opt_gid: | |
467 | if (match_int(&args[0], &option)) | |
468 | return 0; | |
469 | popt->gid = option; | |
5c4a656b | 470 | popt->gid_set = 1; |
1da177e4 LT |
471 | break; |
472 | case Opt_mode: | |
473 | if (match_int(&args[0], &option)) | |
474 | return 0; | |
9b7880e7 JK |
475 | popt->fmode = option; |
476 | break; | |
477 | case Opt_dmode: | |
478 | if (match_int(&args[0], &option)) | |
479 | return 0; | |
480 | popt->dmode = option; | |
1da177e4 | 481 | break; |
52b680c8 JK |
482 | case Opt_overriderockperm: |
483 | popt->overriderockperm = 1; | |
484 | break; | |
1da177e4 LT |
485 | case Opt_block: |
486 | if (match_int(&args[0], &option)) | |
487 | return 0; | |
488 | n = option; | |
489 | if (n != 512 && n != 1024 && n != 2048) | |
490 | return 0; | |
491 | popt->blocksize = n; | |
492 | break; | |
493 | case Opt_nocompress: | |
494 | popt->nocompress = 1; | |
495 | break; | |
496 | default: | |
497 | return 0; | |
498 | } | |
499 | } | |
500 | return 1; | |
501 | } | |
502 | ||
503 | /* | |
504 | * look if the driver can tell the multi session redirection value | |
505 | * | |
506 | * don't change this if you don't know what you do, please! | |
507 | * Multisession is legal only with XA disks. | |
508 | * A non-XA disk with more than one volume descriptor may do it right, but | |
509 | * usually is written in a nowhere standardized "multi-partition" manner. | |
510 | * Multisession uses absolute addressing (solely the first frame of the whole | |
511 | * track is #0), multi-partition uses relative addressing (each first frame of | |
512 | * each track is #0), and a track is not a session. | |
513 | * | |
514 | * A broken CDwriter software or drive firmware does not set new standards, | |
515 | * at least not if conflicting with the existing ones. | |
516 | * | |
517 | * emoenke@gwdg.de | |
518 | */ | |
519 | #define WE_OBEY_THE_WRITTEN_STANDARDS 1 | |
520 | ||
9eb7f2c6 | 521 | static unsigned int isofs_get_last_session(struct super_block *sb, s32 session) |
1da177e4 LT |
522 | { |
523 | struct cdrom_multisession ms_info; | |
524 | unsigned int vol_desc_start; | |
525 | struct block_device *bdev = sb->s_bdev; | |
526 | int i; | |
527 | ||
528 | vol_desc_start=0; | |
529 | ms_info.addr_format=CDROM_LBA; | |
530 | if(session >= 0 && session <= 99) { | |
531 | struct cdrom_tocentry Te; | |
532 | Te.cdte_track=session; | |
533 | Te.cdte_format=CDROM_LBA; | |
534 | i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te); | |
535 | if (!i) { | |
c3ed85a3 DJ |
536 | printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n", |
537 | session, Te.cdte_addr.lba, | |
538 | Te.cdte_ctrl&CDROM_DATA_TRACK); | |
1da177e4 LT |
539 | if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4) |
540 | return Te.cdte_addr.lba; | |
541 | } | |
c3ed85a3 DJ |
542 | |
543 | printk(KERN_ERR "ISOFS: Invalid session number or type of track\n"); | |
1da177e4 LT |
544 | } |
545 | i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info); | |
9eb7f2c6 | 546 | if (session > 0) |
c3ed85a3 | 547 | printk(KERN_ERR "ISOFS: Invalid session number\n"); |
1da177e4 | 548 | #if 0 |
c3ed85a3 | 549 | printk(KERN_DEBUG "isofs.inode: CDROMMULTISESSION: rc=%d\n",i); |
1da177e4 | 550 | if (i==0) { |
c3ed85a3 DJ |
551 | printk(KERN_DEBUG "isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no"); |
552 | printk(KERN_DEBUG "isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba); | |
1da177e4 LT |
553 | } |
554 | #endif | |
555 | if (i==0) | |
556 | #if WE_OBEY_THE_WRITTEN_STANDARDS | |
c3ed85a3 | 557 | if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */ |
1da177e4 | 558 | #endif |
c3ed85a3 | 559 | vol_desc_start=ms_info.addr.lba; |
1da177e4 LT |
560 | return vol_desc_start; |
561 | } | |
562 | ||
e45c9eff OZ |
563 | /* |
564 | * Check if root directory is empty (has less than 3 files). | |
565 | * | |
566 | * Used to detect broken CDs where ISO root directory is empty but Joliet root | |
567 | * directory is OK. If such CD has Rock Ridge extensions, they will be disabled | |
568 | * (and Joliet used instead) or else no files would be visible. | |
569 | */ | |
570 | static bool rootdir_empty(struct super_block *sb, unsigned long block) | |
571 | { | |
572 | int offset = 0, files = 0, de_len; | |
573 | struct iso_directory_record *de; | |
574 | struct buffer_head *bh; | |
575 | ||
576 | bh = sb_bread(sb, block); | |
577 | if (!bh) | |
578 | return true; | |
579 | while (files < 3) { | |
580 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
581 | de_len = *(unsigned char *) de; | |
582 | if (de_len == 0) | |
583 | break; | |
584 | files++; | |
585 | offset += de_len; | |
586 | } | |
587 | brelse(bh); | |
588 | return files < 3; | |
589 | } | |
590 | ||
1da177e4 LT |
591 | /* |
592 | * Initialize the superblock and read the root inode. | |
593 | * | |
594 | * Note: a check_disk_change() has been done immediately prior | |
595 | * to this call, so we don't need to check again. | |
596 | */ | |
597 | static int isofs_fill_super(struct super_block *s, void *data, int silent) | |
598 | { | |
c3ed85a3 DJ |
599 | struct buffer_head *bh = NULL, *pri_bh = NULL; |
600 | struct hs_primary_descriptor *h_pri = NULL; | |
601 | struct iso_primary_descriptor *pri = NULL; | |
1da177e4 | 602 | struct iso_supplementary_descriptor *sec = NULL; |
c3ed85a3 DJ |
603 | struct iso_directory_record *rootp; |
604 | struct inode *inode; | |
605 | struct iso9660_options opt; | |
606 | struct isofs_sb_info *sbi; | |
607 | unsigned long first_data_zone; | |
608 | int joliet_level = 0; | |
609 | int iso_blknum, block; | |
610 | int orig_zonesize; | |
c4386c83 | 611 | int table, error = -EINVAL; |
c3ed85a3 | 612 | unsigned int vol_desc_start; |
1da177e4 | 613 | |
d0132eea MS |
614 | save_mount_options(s, data); |
615 | ||
f8314dc6 | 616 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
4f819a78 | 617 | if (!sbi) |
1da177e4 LT |
618 | return -ENOMEM; |
619 | s->s_fs_info = sbi; | |
1da177e4 | 620 | |
9eb7f2c6 | 621 | if (!parse_options((char *)data, &opt)) |
1da177e4 LT |
622 | goto out_freesbi; |
623 | ||
624 | /* | |
625 | * First of all, get the hardware blocksize for this device. | |
626 | * If we don't know what it is, or the hardware blocksize is | |
627 | * larger than the blocksize the user specified, then use | |
628 | * that value. | |
629 | */ | |
630 | /* | |
631 | * What if bugger tells us to go beyond page size? | |
632 | */ | |
633 | opt.blocksize = sb_min_blocksize(s, opt.blocksize); | |
634 | ||
635 | sbi->s_high_sierra = 0; /* default is iso9660 */ | |
636 | ||
637 | vol_desc_start = (opt.sbsector != -1) ? | |
638 | opt.sbsector : isofs_get_last_session(s,opt.session); | |
639 | ||
c3ed85a3 DJ |
640 | for (iso_blknum = vol_desc_start+16; |
641 | iso_blknum < vol_desc_start+100; iso_blknum++) { | |
642 | struct hs_volume_descriptor *hdp; | |
643 | struct iso_volume_descriptor *vdp; | |
644 | ||
645 | block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits); | |
646 | if (!(bh = sb_bread(s, block))) | |
647 | goto out_no_read; | |
648 | ||
649 | vdp = (struct iso_volume_descriptor *)bh->b_data; | |
650 | hdp = (struct hs_volume_descriptor *)bh->b_data; | |
651 | ||
652 | /* | |
653 | * Due to the overlapping physical location of the descriptors, | |
654 | * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure | |
655 | * proper identification in this case, we first check for ISO. | |
656 | */ | |
657 | if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) { | |
658 | if (isonum_711(vdp->type) == ISO_VD_END) | |
659 | break; | |
660 | if (isonum_711(vdp->type) == ISO_VD_PRIMARY) { | |
661 | if (pri == NULL) { | |
662 | pri = (struct iso_primary_descriptor *)vdp; | |
663 | /* Save the buffer in case we need it ... */ | |
664 | pri_bh = bh; | |
665 | bh = NULL; | |
666 | } | |
667 | } | |
1da177e4 | 668 | #ifdef CONFIG_JOLIET |
c3ed85a3 DJ |
669 | else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) { |
670 | sec = (struct iso_supplementary_descriptor *)vdp; | |
671 | if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) { | |
8711c67b | 672 | if (opt.joliet) { |
c3ed85a3 DJ |
673 | if (sec->escape[2] == 0x40) |
674 | joliet_level = 1; | |
675 | else if (sec->escape[2] == 0x43) | |
676 | joliet_level = 2; | |
677 | else if (sec->escape[2] == 0x45) | |
678 | joliet_level = 3; | |
679 | ||
680 | printk(KERN_DEBUG "ISO 9660 Extensions: " | |
681 | "Microsoft Joliet Level %d\n", | |
682 | joliet_level); | |
683 | } | |
684 | goto root_found; | |
685 | } else { | |
686 | /* Unknown supplementary volume descriptor */ | |
687 | sec = NULL; | |
688 | } | |
1da177e4 | 689 | } |
1da177e4 | 690 | #endif |
c3ed85a3 DJ |
691 | } else { |
692 | if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) { | |
693 | if (isonum_711(hdp->type) != ISO_VD_PRIMARY) | |
694 | goto out_freebh; | |
695 | ||
696 | sbi->s_high_sierra = 1; | |
5404ac8e | 697 | opt.rock = 0; |
c3ed85a3 DJ |
698 | h_pri = (struct hs_primary_descriptor *)vdp; |
699 | goto root_found; | |
700 | } | |
1da177e4 | 701 | } |
1da177e4 | 702 | |
c3ed85a3 | 703 | /* Just skip any volume descriptors we don't recognize */ |
1da177e4 | 704 | |
c3ed85a3 DJ |
705 | brelse(bh); |
706 | bh = NULL; | |
1da177e4 LT |
707 | } |
708 | /* | |
709 | * If we fall through, either no volume descriptor was found, | |
710 | * or else we passed a primary descriptor looking for others. | |
711 | */ | |
712 | if (!pri) | |
713 | goto out_unknown_format; | |
714 | brelse(bh); | |
715 | bh = pri_bh; | |
716 | pri_bh = NULL; | |
717 | ||
718 | root_found: | |
719 | ||
5404ac8e | 720 | if (joliet_level && (pri == NULL || !opt.rock)) { |
c3ed85a3 DJ |
721 | /* This is the case of Joliet with the norock mount flag. |
722 | * A disc with both Joliet and Rock Ridge is handled later | |
723 | */ | |
724 | pri = (struct iso_primary_descriptor *) sec; | |
1da177e4 LT |
725 | } |
726 | ||
727 | if(sbi->s_high_sierra){ | |
c3ed85a3 DJ |
728 | rootp = (struct iso_directory_record *) h_pri->root_directory_record; |
729 | sbi->s_nzones = isonum_733(h_pri->volume_space_size); | |
730 | sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size); | |
731 | sbi->s_max_size = isonum_733(h_pri->volume_space_size); | |
1da177e4 | 732 | } else { |
c3ed85a3 DJ |
733 | if (!pri) |
734 | goto out_freebh; | |
735 | rootp = (struct iso_directory_record *) pri->root_directory_record; | |
736 | sbi->s_nzones = isonum_733(pri->volume_space_size); | |
737 | sbi->s_log_zone_size = isonum_723(pri->logical_block_size); | |
738 | sbi->s_max_size = isonum_733(pri->volume_space_size); | |
1da177e4 LT |
739 | } |
740 | ||
741 | sbi->s_ninodes = 0; /* No way to figure this out easily */ | |
742 | ||
743 | orig_zonesize = sbi->s_log_zone_size; | |
744 | /* | |
745 | * If the zone size is smaller than the hardware sector size, | |
746 | * this is a fatal error. This would occur if the disc drive | |
747 | * had sectors that were 2048 bytes, but the filesystem had | |
748 | * blocks that were 512 bytes (which should only very rarely | |
749 | * happen.) | |
750 | */ | |
c3ed85a3 | 751 | if (orig_zonesize < opt.blocksize) |
1da177e4 LT |
752 | goto out_bad_size; |
753 | ||
754 | /* RDE: convert log zone size to bit shift */ | |
c3ed85a3 DJ |
755 | switch (sbi->s_log_zone_size) { |
756 | case 512: sbi->s_log_zone_size = 9; break; | |
757 | case 1024: sbi->s_log_zone_size = 10; break; | |
758 | case 2048: sbi->s_log_zone_size = 11; break; | |
1da177e4 | 759 | |
c3ed85a3 | 760 | default: |
1da177e4 | 761 | goto out_bad_zone_size; |
c3ed85a3 | 762 | } |
1da177e4 LT |
763 | |
764 | s->s_magic = ISOFS_SUPER_MAGIC; | |
66a362a2 JA |
765 | |
766 | /* | |
767 | * With multi-extent files, file size is only limited by the maximum | |
768 | * size of a file system, which is 8 TB. | |
769 | */ | |
770 | s->s_maxbytes = 0x80000000000LL; | |
1da177e4 | 771 | |
c3ed85a3 DJ |
772 | /* |
773 | * The CDROM is read-only, has no nodes (devices) on it, and since | |
774 | * all of the files appear to be owned by root, we really do not want | |
775 | * to allow suid. (suid or devices will not show up unless we have | |
776 | * Rock Ridge extensions) | |
777 | */ | |
1da177e4 LT |
778 | |
779 | s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */; | |
780 | ||
781 | /* Set this for reference. Its not currently used except on write | |
782 | which we don't have .. */ | |
c3ed85a3 DJ |
783 | |
784 | first_data_zone = isonum_733(rootp->extent) + | |
785 | isonum_711(rootp->ext_attr_length); | |
1da177e4 LT |
786 | sbi->s_firstdatazone = first_data_zone; |
787 | #ifndef BEQUIET | |
c3ed85a3 DJ |
788 | printk(KERN_DEBUG "ISOFS: Max size:%ld Log zone size:%ld\n", |
789 | sbi->s_max_size, 1UL << sbi->s_log_zone_size); | |
790 | printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone); | |
1da177e4 | 791 | if(sbi->s_high_sierra) |
c3ed85a3 | 792 | printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n"); |
1da177e4 LT |
793 | #endif |
794 | ||
795 | /* | |
796 | * If the Joliet level is set, we _may_ decide to use the | |
797 | * secondary descriptor, but can't be sure until after we | |
798 | * read the root inode. But before reading the root inode | |
799 | * we may need to change the device blocksize, and would | |
800 | * rather release the old buffer first. So, we cache the | |
801 | * first_data_zone value from the secondary descriptor. | |
802 | */ | |
803 | if (joliet_level) { | |
804 | pri = (struct iso_primary_descriptor *) sec; | |
805 | rootp = (struct iso_directory_record *) | |
806 | pri->root_directory_record; | |
c3ed85a3 DJ |
807 | first_data_zone = isonum_733(rootp->extent) + |
808 | isonum_711(rootp->ext_attr_length); | |
1da177e4 LT |
809 | } |
810 | ||
811 | /* | |
812 | * We're all done using the volume descriptor, and may need | |
813 | * to change the device blocksize, so release the buffer now. | |
814 | */ | |
815 | brelse(pri_bh); | |
816 | brelse(bh); | |
817 | ||
818 | /* | |
819 | * Force the blocksize to 512 for 512 byte sectors. The file | |
820 | * read primitives really get it wrong in a bad way if we don't | |
821 | * do this. | |
822 | * | |
823 | * Note - we should never be setting the blocksize to something | |
824 | * less than the hardware sector size for the device. If we | |
825 | * do, we would end up having to read larger buffers and split | |
826 | * out portions to satisfy requests. | |
827 | * | |
828 | * Note2- the idea here is that we want to deal with the optimal | |
829 | * zonesize in the filesystem. If we have it set to something less, | |
830 | * then we have horrible problems with trying to piece together | |
831 | * bits of adjacent blocks in order to properly read directory | |
832 | * entries. By forcing the blocksize in this way, we ensure | |
833 | * that we will never be required to do this. | |
834 | */ | |
835 | sb_set_blocksize(s, orig_zonesize); | |
836 | ||
837 | sbi->s_nls_iocharset = NULL; | |
838 | ||
839 | #ifdef CONFIG_JOLIET | |
840 | if (joliet_level && opt.utf8 == 0) { | |
c3ed85a3 | 841 | char *p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT; |
1da177e4 LT |
842 | sbi->s_nls_iocharset = load_nls(p); |
843 | if (! sbi->s_nls_iocharset) { | |
844 | /* Fail only if explicit charset specified */ | |
845 | if (opt.iocharset) | |
846 | goto out_freesbi; | |
847 | sbi->s_nls_iocharset = load_nls_default(); | |
848 | } | |
849 | } | |
850 | #endif | |
851 | s->s_op = &isofs_sops; | |
852 | s->s_export_op = &isofs_export_ops; | |
853 | sbi->s_mapping = opt.map; | |
5404ac8e | 854 | sbi->s_rock = (opt.rock ? 2 : 0); |
1da177e4 LT |
855 | sbi->s_rock_offset = -1; /* initial offset, will guess until SP is found*/ |
856 | sbi->s_cruft = opt.cruft; | |
9769f4eb JW |
857 | sbi->s_hide = opt.hide; |
858 | sbi->s_showassoc = opt.showassoc; | |
1da177e4 LT |
859 | sbi->s_uid = opt.uid; |
860 | sbi->s_gid = opt.gid; | |
5c4a656b JK |
861 | sbi->s_uid_set = opt.uid_set; |
862 | sbi->s_gid_set = opt.gid_set; | |
1da177e4 LT |
863 | sbi->s_utf8 = opt.utf8; |
864 | sbi->s_nocompress = opt.nocompress; | |
52b680c8 | 865 | sbi->s_overriderockperm = opt.overriderockperm; |
1da177e4 LT |
866 | /* |
867 | * It would be incredibly stupid to allow people to mark every file | |
868 | * on the disk as suid, so we merely allow them to set the default | |
869 | * permissions. | |
870 | */ | |
52b680c8 JK |
871 | if (opt.fmode != ISOFS_INVALID_MODE) |
872 | sbi->s_fmode = opt.fmode & 0777; | |
873 | else | |
874 | sbi->s_fmode = ISOFS_INVALID_MODE; | |
875 | if (opt.dmode != ISOFS_INVALID_MODE) | |
876 | sbi->s_dmode = opt.dmode & 0777; | |
877 | else | |
878 | sbi->s_dmode = ISOFS_INVALID_MODE; | |
1da177e4 LT |
879 | |
880 | /* | |
881 | * Read the root inode, which _may_ result in changing | |
882 | * the s_rock flag. Once we have the final s_rock value, | |
883 | * we then decide whether to use the Joliet descriptor. | |
884 | */ | |
885 | inode = isofs_iget(s, sbi->s_firstdatazone, 0); | |
c4386c83 DH |
886 | if (IS_ERR(inode)) |
887 | goto out_no_root; | |
1da177e4 | 888 | |
e45c9eff OZ |
889 | /* |
890 | * Fix for broken CDs with Rock Ridge and empty ISO root directory but | |
891 | * correct Joliet root directory. | |
892 | */ | |
893 | if (sbi->s_rock == 1 && joliet_level && | |
894 | rootdir_empty(s, sbi->s_firstdatazone)) { | |
895 | printk(KERN_NOTICE | |
896 | "ISOFS: primary root directory is empty. " | |
897 | "Disabling Rock Ridge and switching to Joliet."); | |
898 | sbi->s_rock = 0; | |
899 | } | |
900 | ||
1da177e4 LT |
901 | /* |
902 | * If this disk has both Rock Ridge and Joliet on it, then we | |
903 | * want to use Rock Ridge by default. This can be overridden | |
904 | * by using the norock mount option. There is still one other | |
905 | * possibility that is not taken into account: a Rock Ridge | |
906 | * CD with Unicode names. Until someone sees such a beast, it | |
907 | * will not be supported. | |
908 | */ | |
909 | if (sbi->s_rock == 1) { | |
910 | joliet_level = 0; | |
911 | } else if (joliet_level) { | |
912 | sbi->s_rock = 0; | |
913 | if (sbi->s_firstdatazone != first_data_zone) { | |
914 | sbi->s_firstdatazone = first_data_zone; | |
c3ed85a3 | 915 | printk(KERN_DEBUG |
1da177e4 LT |
916 | "ISOFS: changing to secondary root\n"); |
917 | iput(inode); | |
918 | inode = isofs_iget(s, sbi->s_firstdatazone, 0); | |
c4386c83 DH |
919 | if (IS_ERR(inode)) |
920 | goto out_no_root; | |
1da177e4 LT |
921 | } |
922 | } | |
923 | ||
924 | if (opt.check == 'u') { | |
925 | /* Only Joliet is case insensitive by default */ | |
c3ed85a3 DJ |
926 | if (joliet_level) |
927 | opt.check = 'r'; | |
928 | else | |
929 | opt.check = 's'; | |
1da177e4 LT |
930 | } |
931 | sbi->s_joliet_level = joliet_level; | |
932 | ||
817794e0 KK |
933 | /* Make sure the root inode is a directory */ |
934 | if (!S_ISDIR(inode->i_mode)) { | |
935 | printk(KERN_WARNING | |
936 | "isofs_fill_super: root inode is not a directory. " | |
937 | "Corrupted media?\n"); | |
938 | goto out_iput; | |
939 | } | |
940 | ||
1da177e4 | 941 | table = 0; |
c3ed85a3 DJ |
942 | if (joliet_level) |
943 | table += 2; | |
944 | if (opt.check == 'r') | |
945 | table++; | |
6cc9c1d2 AV |
946 | |
947 | s->s_d_op = &isofs_dentry_ops[table]; | |
948 | ||
949 | /* get the root dentry */ | |
950 | s->s_root = d_alloc_root(inode); | |
951 | if (!(s->s_root)) | |
952 | goto out_no_root; | |
1da177e4 | 953 | |
f99d49ad | 954 | kfree(opt.iocharset); |
1da177e4 LT |
955 | |
956 | return 0; | |
957 | ||
958 | /* | |
959 | * Display error messages and free resources. | |
960 | */ | |
1da177e4 LT |
961 | out_iput: |
962 | iput(inode); | |
c4386c83 DH |
963 | goto out_no_inode; |
964 | out_no_root: | |
965 | error = PTR_ERR(inode); | |
966 | if (error != -ENOMEM) | |
967 | printk(KERN_WARNING "%s: get root inode failed\n", __func__); | |
968 | out_no_inode: | |
1da177e4 | 969 | #ifdef CONFIG_JOLIET |
6d729e44 | 970 | unload_nls(sbi->s_nls_iocharset); |
1da177e4 LT |
971 | #endif |
972 | goto out_freesbi; | |
973 | out_no_read: | |
c3ed85a3 DJ |
974 | printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n", |
975 | __func__, s->s_id, iso_blknum, block); | |
c11760c6 | 976 | goto out_freebh; |
1da177e4 | 977 | out_bad_zone_size: |
c3ed85a3 | 978 | printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n", |
1da177e4 LT |
979 | sbi->s_log_zone_size); |
980 | goto out_freebh; | |
981 | out_bad_size: | |
c3ed85a3 | 982 | printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n", |
1da177e4 LT |
983 | orig_zonesize, opt.blocksize); |
984 | goto out_freebh; | |
985 | out_unknown_format: | |
986 | if (!silent) | |
c3ed85a3 | 987 | printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n"); |
1da177e4 LT |
988 | |
989 | out_freebh: | |
990 | brelse(bh); | |
c11760c6 | 991 | brelse(pri_bh); |
1da177e4 | 992 | out_freesbi: |
f99d49ad | 993 | kfree(opt.iocharset); |
1da177e4 LT |
994 | kfree(sbi); |
995 | s->s_fs_info = NULL; | |
c4386c83 | 996 | return error; |
1da177e4 LT |
997 | } |
998 | ||
726c3342 | 999 | static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1000 | { |
726c3342 | 1001 | struct super_block *sb = dentry->d_sb; |
2430c4da | 1002 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 1003 | |
1da177e4 LT |
1004 | buf->f_type = ISOFS_SUPER_MAGIC; |
1005 | buf->f_bsize = sb->s_blocksize; | |
1006 | buf->f_blocks = (ISOFS_SB(sb)->s_nzones | |
c3ed85a3 | 1007 | << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits)); |
1da177e4 LT |
1008 | buf->f_bfree = 0; |
1009 | buf->f_bavail = 0; | |
1010 | buf->f_files = ISOFS_SB(sb)->s_ninodes; | |
1011 | buf->f_ffree = 0; | |
2430c4da CL |
1012 | buf->f_fsid.val[0] = (u32)id; |
1013 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
1014 | buf->f_namelen = NAME_MAX; |
1015 | return 0; | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * Get a set of blocks; filling in buffer_heads if already allocated | |
1020 | * or getblk() if they are not. Returns the number of blocks inserted | |
c4386c83 | 1021 | * (-ve == error.) |
1da177e4 | 1022 | */ |
fde214d4 | 1023 | int isofs_get_blocks(struct inode *inode, sector_t iblock, |
1da177e4 LT |
1024 | struct buffer_head **bh, unsigned long nblocks) |
1025 | { | |
fde214d4 | 1026 | unsigned long b_off = iblock; |
1da177e4 LT |
1027 | unsigned offset, sect_size; |
1028 | unsigned int firstext; | |
1029 | unsigned long nextblk, nextoff; | |
c4386c83 | 1030 | int section, rv, error; |
1da177e4 LT |
1031 | struct iso_inode_info *ei = ISOFS_I(inode); |
1032 | ||
c4386c83 | 1033 | error = -EIO; |
1da177e4 | 1034 | rv = 0; |
fde214d4 | 1035 | if (iblock != b_off) { |
c3ed85a3 | 1036 | printk(KERN_DEBUG "%s: block number too large\n", __func__); |
1da177e4 LT |
1037 | goto abort; |
1038 | } | |
1039 | ||
c3ed85a3 DJ |
1040 | |
1041 | offset = 0; | |
1042 | firstext = ei->i_first_extent; | |
1da177e4 | 1043 | sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode); |
c3ed85a3 DJ |
1044 | nextblk = ei->i_next_section_block; |
1045 | nextoff = ei->i_next_section_offset; | |
1046 | section = 0; | |
1da177e4 | 1047 | |
c3ed85a3 | 1048 | while (nblocks) { |
1da177e4 LT |
1049 | /* If we are *way* beyond the end of the file, print a message. |
1050 | * Access beyond the end of the file up to the next page boundary | |
1051 | * is normal, however because of the way the page cache works. | |
1052 | * In this case, we just return 0 so that we can properly fill | |
1053 | * the page with useless information without generating any | |
1054 | * I/O errors. | |
1055 | */ | |
1056 | if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) { | |
fde214d4 JK |
1057 | printk(KERN_DEBUG "%s: block >= EOF (%lu, %llu)\n", |
1058 | __func__, b_off, | |
1059 | (unsigned long long)inode->i_size); | |
1da177e4 LT |
1060 | goto abort; |
1061 | } | |
c3ed85a3 | 1062 | |
fb50ae74 JRV |
1063 | /* On the last section, nextblk == 0, section size is likely to |
1064 | * exceed sect_size by a partial block, and access beyond the | |
1065 | * end of the file will reach beyond the section size, too. | |
1066 | */ | |
1067 | while (nextblk && (b_off >= (offset + sect_size))) { | |
1068 | struct inode *ninode; | |
1069 | ||
1070 | offset += sect_size; | |
1071 | ninode = isofs_iget(inode->i_sb, nextblk, nextoff); | |
c4386c83 DH |
1072 | if (IS_ERR(ninode)) { |
1073 | error = PTR_ERR(ninode); | |
fb50ae74 | 1074 | goto abort; |
c4386c83 | 1075 | } |
fb50ae74 JRV |
1076 | firstext = ISOFS_I(ninode)->i_first_extent; |
1077 | sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode); | |
1078 | nextblk = ISOFS_I(ninode)->i_next_section_block; | |
1079 | nextoff = ISOFS_I(ninode)->i_next_section_offset; | |
1080 | iput(ninode); | |
1081 | ||
1082 | if (++section > 100) { | |
c3ed85a3 DJ |
1083 | printk(KERN_DEBUG "%s: More than 100 file sections ?!?" |
1084 | " aborting...\n", __func__); | |
fde214d4 | 1085 | printk(KERN_DEBUG "%s: block=%lu firstext=%u sect_size=%u " |
c3ed85a3 | 1086 | "nextblk=%lu nextoff=%lu\n", __func__, |
fde214d4 | 1087 | b_off, firstext, (unsigned) sect_size, |
c3ed85a3 | 1088 | nextblk, nextoff); |
fb50ae74 | 1089 | goto abort; |
1da177e4 LT |
1090 | } |
1091 | } | |
c3ed85a3 DJ |
1092 | |
1093 | if (*bh) { | |
1da177e4 LT |
1094 | map_bh(*bh, inode->i_sb, firstext + b_off - offset); |
1095 | } else { | |
1096 | *bh = sb_getblk(inode->i_sb, firstext+b_off-offset); | |
c3ed85a3 | 1097 | if (!*bh) |
1da177e4 LT |
1098 | goto abort; |
1099 | } | |
1100 | bh++; /* Next buffer head */ | |
1101 | b_off++; /* Next buffer offset */ | |
1102 | nblocks--; | |
1103 | rv++; | |
1104 | } | |
1105 | ||
c4386c83 | 1106 | error = 0; |
1da177e4 | 1107 | abort: |
c4386c83 | 1108 | return rv != 0 ? rv : error; |
1da177e4 LT |
1109 | } |
1110 | ||
1111 | /* | |
1112 | * Used by the standard interfaces. | |
1113 | */ | |
1114 | static int isofs_get_block(struct inode *inode, sector_t iblock, | |
1115 | struct buffer_head *bh_result, int create) | |
1116 | { | |
c4386c83 DH |
1117 | int ret; |
1118 | ||
9eb7f2c6 | 1119 | if (create) { |
c3ed85a3 | 1120 | printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__); |
1da177e4 LT |
1121 | return -EROFS; |
1122 | } | |
1123 | ||
c4386c83 DH |
1124 | ret = isofs_get_blocks(inode, iblock, &bh_result, 1); |
1125 | return ret < 0 ? ret : 0; | |
1da177e4 LT |
1126 | } |
1127 | ||
1128 | static int isofs_bmap(struct inode *inode, sector_t block) | |
1129 | { | |
1130 | struct buffer_head dummy; | |
1131 | int error; | |
1132 | ||
1133 | dummy.b_state = 0; | |
1134 | dummy.b_blocknr = -1000; | |
1135 | error = isofs_get_block(inode, block, &dummy, 0); | |
1136 | if (!error) | |
1137 | return dummy.b_blocknr; | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | struct buffer_head *isofs_bread(struct inode *inode, sector_t block) | |
1142 | { | |
1143 | sector_t blknr = isofs_bmap(inode, block); | |
1144 | if (!blknr) | |
1145 | return NULL; | |
1146 | return sb_bread(inode->i_sb, blknr); | |
1147 | } | |
1148 | ||
1149 | static int isofs_readpage(struct file *file, struct page *page) | |
1150 | { | |
1151 | return block_read_full_page(page,isofs_get_block); | |
1152 | } | |
1153 | ||
1154 | static sector_t _isofs_bmap(struct address_space *mapping, sector_t block) | |
1155 | { | |
1156 | return generic_block_bmap(mapping,block,isofs_get_block); | |
1157 | } | |
1158 | ||
f5e54d6e | 1159 | static const struct address_space_operations isofs_aops = { |
1da177e4 | 1160 | .readpage = isofs_readpage, |
1da177e4 LT |
1161 | .bmap = _isofs_bmap |
1162 | }; | |
1163 | ||
9eb7f2c6 | 1164 | static int isofs_read_level3_size(struct inode *inode) |
1da177e4 LT |
1165 | { |
1166 | unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); | |
1167 | int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra; | |
c3ed85a3 | 1168 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1169 | unsigned long block, offset, block_saved, offset_saved; |
1170 | int i = 0; | |
1171 | int more_entries = 0; | |
c3ed85a3 | 1172 | struct iso_directory_record *tmpde = NULL; |
1da177e4 LT |
1173 | struct iso_inode_info *ei = ISOFS_I(inode); |
1174 | ||
1175 | inode->i_size = 0; | |
1176 | ||
1177 | /* The first 16 blocks are reserved as the System Area. Thus, | |
1178 | * no inodes can appear in block 0. We use this to flag that | |
1179 | * this is the last section. */ | |
1180 | ei->i_next_section_block = 0; | |
1181 | ei->i_next_section_offset = 0; | |
1182 | ||
1183 | block = ei->i_iget5_block; | |
1184 | offset = ei->i_iget5_offset; | |
1185 | ||
1186 | do { | |
c3ed85a3 | 1187 | struct iso_directory_record *de; |
1da177e4 LT |
1188 | unsigned int de_len; |
1189 | ||
1190 | if (!bh) { | |
1191 | bh = sb_bread(inode->i_sb, block); | |
1192 | if (!bh) | |
1193 | goto out_noread; | |
1194 | } | |
1195 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
1196 | de_len = *(unsigned char *) de; | |
1197 | ||
1198 | if (de_len == 0) { | |
1199 | brelse(bh); | |
1200 | bh = NULL; | |
1201 | ++block; | |
1202 | offset = 0; | |
1203 | continue; | |
1204 | } | |
1205 | ||
1206 | block_saved = block; | |
1207 | offset_saved = offset; | |
1208 | offset += de_len; | |
1209 | ||
1210 | /* Make sure we have a full directory entry */ | |
1211 | if (offset >= bufsize) { | |
1212 | int slop = bufsize - offset + de_len; | |
1213 | if (!tmpde) { | |
1214 | tmpde = kmalloc(256, GFP_KERNEL); | |
1215 | if (!tmpde) | |
1216 | goto out_nomem; | |
1217 | } | |
1218 | memcpy(tmpde, de, slop); | |
1219 | offset &= bufsize - 1; | |
1220 | block++; | |
1221 | brelse(bh); | |
1222 | bh = NULL; | |
1223 | if (offset) { | |
1224 | bh = sb_bread(inode->i_sb, block); | |
1225 | if (!bh) | |
1226 | goto out_noread; | |
9eb7f2c6 | 1227 | memcpy((void *)tmpde+slop, bh->b_data, offset); |
1da177e4 LT |
1228 | } |
1229 | de = tmpde; | |
1230 | } | |
1231 | ||
1232 | inode->i_size += isonum_733(de->size); | |
1233 | if (i == 1) { | |
1234 | ei->i_next_section_block = block_saved; | |
1235 | ei->i_next_section_offset = offset_saved; | |
1236 | } | |
1237 | ||
1238 | more_entries = de->flags[-high_sierra] & 0x80; | |
1239 | ||
1240 | i++; | |
9eb7f2c6 | 1241 | if (i > 100) |
1da177e4 | 1242 | goto out_toomany; |
9eb7f2c6 | 1243 | } while (more_entries); |
1da177e4 | 1244 | out: |
9eb7f2c6 | 1245 | kfree(tmpde); |
1da177e4 LT |
1246 | if (bh) |
1247 | brelse(bh); | |
1248 | return 0; | |
1249 | ||
1250 | out_nomem: | |
1251 | if (bh) | |
1252 | brelse(bh); | |
1253 | return -ENOMEM; | |
1254 | ||
1255 | out_noread: | |
1256 | printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block); | |
f99d49ad | 1257 | kfree(tmpde); |
1da177e4 LT |
1258 | return -EIO; |
1259 | ||
1260 | out_toomany: | |
c3ed85a3 DJ |
1261 | printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n" |
1262 | "isofs_read_level3_size: inode=%lu\n", | |
1263 | __func__, inode->i_ino); | |
1da177e4 LT |
1264 | goto out; |
1265 | } | |
1266 | ||
c4386c83 | 1267 | static int isofs_read_inode(struct inode *inode) |
1da177e4 LT |
1268 | { |
1269 | struct super_block *sb = inode->i_sb; | |
1270 | struct isofs_sb_info *sbi = ISOFS_SB(sb); | |
1271 | unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); | |
1272 | unsigned long block; | |
1273 | int high_sierra = sbi->s_high_sierra; | |
c3ed85a3 DJ |
1274 | struct buffer_head *bh = NULL; |
1275 | struct iso_directory_record *de; | |
1276 | struct iso_directory_record *tmpde = NULL; | |
1da177e4 LT |
1277 | unsigned int de_len; |
1278 | unsigned long offset; | |
1279 | struct iso_inode_info *ei = ISOFS_I(inode); | |
c4386c83 | 1280 | int ret = -EIO; |
1da177e4 LT |
1281 | |
1282 | block = ei->i_iget5_block; | |
1283 | bh = sb_bread(inode->i_sb, block); | |
1284 | if (!bh) | |
1285 | goto out_badread; | |
1286 | ||
1287 | offset = ei->i_iget5_offset; | |
1288 | ||
1289 | de = (struct iso_directory_record *) (bh->b_data + offset); | |
1290 | de_len = *(unsigned char *) de; | |
1291 | ||
1292 | if (offset + de_len > bufsize) { | |
1293 | int frag1 = bufsize - offset; | |
1294 | ||
1295 | tmpde = kmalloc(de_len, GFP_KERNEL); | |
1296 | if (tmpde == NULL) { | |
c3ed85a3 | 1297 | printk(KERN_INFO "%s: out of memory\n", __func__); |
c4386c83 | 1298 | ret = -ENOMEM; |
1da177e4 LT |
1299 | goto fail; |
1300 | } | |
1301 | memcpy(tmpde, bh->b_data + offset, frag1); | |
1302 | brelse(bh); | |
1303 | bh = sb_bread(inode->i_sb, ++block); | |
1304 | if (!bh) | |
1305 | goto out_badread; | |
1306 | memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1); | |
1307 | de = tmpde; | |
1308 | } | |
1309 | ||
1310 | inode->i_ino = isofs_get_ino(ei->i_iget5_block, | |
c3ed85a3 DJ |
1311 | ei->i_iget5_offset, |
1312 | ISOFS_BUFFER_BITS(inode)); | |
1da177e4 LT |
1313 | |
1314 | /* Assume it is a normal-format file unless told otherwise */ | |
1315 | ei->i_file_format = isofs_file_normal; | |
1316 | ||
1317 | if (de->flags[-high_sierra] & 2) { | |
52b680c8 JK |
1318 | if (sbi->s_dmode != ISOFS_INVALID_MODE) |
1319 | inode->i_mode = S_IFDIR | sbi->s_dmode; | |
1320 | else | |
1321 | inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
c3ed85a3 DJ |
1322 | inode->i_nlink = 1; /* |
1323 | * Set to 1. We know there are 2, but | |
1324 | * the find utility tries to optimize | |
1325 | * if it is 2, and it screws up. It is | |
1326 | * easier to give 1 which tells find to | |
1327 | * do it the hard way. | |
1328 | */ | |
1da177e4 | 1329 | } else { |
52b680c8 JK |
1330 | if (sbi->s_fmode != ISOFS_INVALID_MODE) { |
1331 | inode->i_mode = S_IFREG | sbi->s_fmode; | |
1332 | } else { | |
1333 | /* | |
1334 | * Set default permissions: r-x for all. The disc | |
1335 | * could be shared with DOS machines so virtually | |
1336 | * anything could be a valid executable. | |
1337 | */ | |
1338 | inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO; | |
1339 | } | |
1da177e4 | 1340 | inode->i_nlink = 1; |
1da177e4 LT |
1341 | } |
1342 | inode->i_uid = sbi->s_uid; | |
1343 | inode->i_gid = sbi->s_gid; | |
ba52de12 | 1344 | inode->i_blocks = 0; |
1da177e4 LT |
1345 | |
1346 | ei->i_format_parm[0] = 0; | |
1347 | ei->i_format_parm[1] = 0; | |
1348 | ei->i_format_parm[2] = 0; | |
1349 | ||
c3ed85a3 | 1350 | ei->i_section_size = isonum_733(de->size); |
9eb7f2c6 | 1351 | if (de->flags[-high_sierra] & 0x80) { |
c4386c83 DH |
1352 | ret = isofs_read_level3_size(inode); |
1353 | if (ret < 0) | |
c3ed85a3 | 1354 | goto fail; |
c4386c83 | 1355 | ret = -EIO; |
1da177e4 LT |
1356 | } else { |
1357 | ei->i_next_section_block = 0; | |
1358 | ei->i_next_section_offset = 0; | |
c3ed85a3 | 1359 | inode->i_size = isonum_733(de->size); |
1da177e4 LT |
1360 | } |
1361 | ||
1362 | /* | |
1363 | * Some dipshit decided to store some other bit of information | |
1364 | * in the high byte of the file length. Truncate size in case | |
1365 | * this CDROM was mounted with the cruft option. | |
1366 | */ | |
1367 | ||
5404ac8e | 1368 | if (sbi->s_cruft) |
1da177e4 LT |
1369 | inode->i_size &= 0x00ffffff; |
1370 | ||
1371 | if (de->interleave[0]) { | |
c3ed85a3 | 1372 | printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n"); |
1da177e4 LT |
1373 | inode->i_size = 0; |
1374 | } | |
1375 | ||
1376 | /* I have no idea what file_unit_size is used for, so | |
1377 | we will flag it for now */ | |
1378 | if (de->file_unit_size[0] != 0) { | |
c3ed85a3 DJ |
1379 | printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n", |
1380 | inode->i_ino); | |
1da177e4 LT |
1381 | } |
1382 | ||
1383 | /* I have no idea what other flag bits are used for, so | |
1384 | we will flag it for now */ | |
1385 | #ifdef DEBUG | |
1386 | if((de->flags[-high_sierra] & ~2)!= 0){ | |
c3ed85a3 DJ |
1387 | printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file " |
1388 | "(%ld %x).\n", | |
1389 | inode->i_ino, de->flags[-high_sierra]); | |
1da177e4 LT |
1390 | } |
1391 | #endif | |
1392 | ||
1393 | inode->i_mtime.tv_sec = | |
1394 | inode->i_atime.tv_sec = | |
1395 | inode->i_ctime.tv_sec = iso_date(de->date, high_sierra); | |
1396 | inode->i_mtime.tv_nsec = | |
1397 | inode->i_atime.tv_nsec = | |
1398 | inode->i_ctime.tv_nsec = 0; | |
1399 | ||
c3ed85a3 DJ |
1400 | ei->i_first_extent = (isonum_733(de->extent) + |
1401 | isonum_711(de->ext_attr_length)); | |
1da177e4 LT |
1402 | |
1403 | /* Set the number of blocks for stat() - should be done before RR */ | |
c3ed85a3 | 1404 | inode->i_blocks = (inode->i_size + 511) >> 9; |
1da177e4 LT |
1405 | |
1406 | /* | |
1407 | * Now test for possible Rock Ridge extensions which will override | |
1408 | * some of these numbers in the inode structure. | |
1409 | */ | |
1410 | ||
1411 | if (!high_sierra) { | |
1412 | parse_rock_ridge_inode(de, inode); | |
1413 | /* if we want uid/gid set, override the rock ridge setting */ | |
5c4a656b JK |
1414 | if (sbi->s_uid_set) |
1415 | inode->i_uid = sbi->s_uid; | |
1416 | if (sbi->s_gid_set) | |
1417 | inode->i_gid = sbi->s_gid; | |
1da177e4 | 1418 | } |
52b680c8 JK |
1419 | /* Now set final access rights if overriding rock ridge setting */ |
1420 | if (S_ISDIR(inode->i_mode) && sbi->s_overriderockperm && | |
1421 | sbi->s_dmode != ISOFS_INVALID_MODE) | |
1422 | inode->i_mode = S_IFDIR | sbi->s_dmode; | |
1423 | if (S_ISREG(inode->i_mode) && sbi->s_overriderockperm && | |
1424 | sbi->s_fmode != ISOFS_INVALID_MODE) | |
1425 | inode->i_mode = S_IFREG | sbi->s_fmode; | |
1da177e4 LT |
1426 | |
1427 | /* Install the inode operations vector */ | |
1428 | if (S_ISREG(inode->i_mode)) { | |
1429 | inode->i_fop = &generic_ro_fops; | |
c3ed85a3 | 1430 | switch (ei->i_file_format) { |
1da177e4 LT |
1431 | #ifdef CONFIG_ZISOFS |
1432 | case isofs_file_compressed: | |
1433 | inode->i_data.a_ops = &zisofs_aops; | |
1434 | break; | |
1435 | #endif | |
1436 | default: | |
1437 | inode->i_data.a_ops = &isofs_aops; | |
1438 | break; | |
1439 | } | |
1440 | } else if (S_ISDIR(inode->i_mode)) { | |
1441 | inode->i_op = &isofs_dir_inode_operations; | |
1442 | inode->i_fop = &isofs_dir_operations; | |
1443 | } else if (S_ISLNK(inode->i_mode)) { | |
1444 | inode->i_op = &page_symlink_inode_operations; | |
1445 | inode->i_data.a_ops = &isofs_symlink_aops; | |
1446 | } else | |
1447 | /* XXX - parse_rock_ridge_inode() had already set i_rdev. */ | |
1448 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1449 | ||
c4386c83 | 1450 | ret = 0; |
9eb7f2c6 | 1451 | out: |
f99d49ad | 1452 | kfree(tmpde); |
1da177e4 LT |
1453 | if (bh) |
1454 | brelse(bh); | |
c4386c83 | 1455 | return ret; |
1da177e4 | 1456 | |
9eb7f2c6 | 1457 | out_badread: |
1da177e4 | 1458 | printk(KERN_WARNING "ISOFS: unable to read i-node block\n"); |
9eb7f2c6 | 1459 | fail: |
1da177e4 LT |
1460 | goto out; |
1461 | } | |
1462 | ||
1463 | struct isofs_iget5_callback_data { | |
1464 | unsigned long block; | |
1465 | unsigned long offset; | |
1466 | }; | |
1467 | ||
1468 | static int isofs_iget5_test(struct inode *ino, void *data) | |
1469 | { | |
1470 | struct iso_inode_info *i = ISOFS_I(ino); | |
1471 | struct isofs_iget5_callback_data *d = | |
1472 | (struct isofs_iget5_callback_data*)data; | |
1473 | return (i->i_iget5_block == d->block) | |
c3ed85a3 | 1474 | && (i->i_iget5_offset == d->offset); |
1da177e4 LT |
1475 | } |
1476 | ||
1477 | static int isofs_iget5_set(struct inode *ino, void *data) | |
1478 | { | |
1479 | struct iso_inode_info *i = ISOFS_I(ino); | |
1480 | struct isofs_iget5_callback_data *d = | |
1481 | (struct isofs_iget5_callback_data*)data; | |
1482 | i->i_iget5_block = d->block; | |
1483 | i->i_iget5_offset = d->offset; | |
1484 | return 0; | |
1485 | } | |
1486 | ||
1487 | /* Store, in the inode's containing structure, the block and block | |
1488 | * offset that point to the underlying meta-data for the inode. The | |
1489 | * code below is otherwise similar to the iget() code in | |
1490 | * include/linux/fs.h */ | |
1491 | struct inode *isofs_iget(struct super_block *sb, | |
1492 | unsigned long block, | |
1493 | unsigned long offset) | |
1494 | { | |
1495 | unsigned long hashval; | |
1496 | struct inode *inode; | |
1497 | struct isofs_iget5_callback_data data; | |
c4386c83 | 1498 | long ret; |
1da177e4 LT |
1499 | |
1500 | if (offset >= 1ul << sb->s_blocksize_bits) | |
c4386c83 | 1501 | return ERR_PTR(-EINVAL); |
1da177e4 LT |
1502 | |
1503 | data.block = block; | |
1504 | data.offset = offset; | |
1505 | ||
1506 | hashval = (block << sb->s_blocksize_bits) | offset; | |
1507 | ||
9eb7f2c6 | 1508 | inode = iget5_locked(sb, hashval, &isofs_iget5_test, |
c3ed85a3 | 1509 | &isofs_iget5_set, &data); |
1da177e4 | 1510 | |
c4386c83 DH |
1511 | if (!inode) |
1512 | return ERR_PTR(-ENOMEM); | |
1513 | ||
1514 | if (inode->i_state & I_NEW) { | |
1515 | ret = isofs_read_inode(inode); | |
1516 | if (ret < 0) { | |
1517 | iget_failed(inode); | |
1518 | inode = ERR_PTR(ret); | |
1519 | } else { | |
1520 | unlock_new_inode(inode); | |
1521 | } | |
1da177e4 LT |
1522 | } |
1523 | ||
1524 | return inode; | |
1525 | } | |
1526 | ||
152a0836 AV |
1527 | static struct dentry *isofs_mount(struct file_system_type *fs_type, |
1528 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1529 | { |
152a0836 | 1530 | return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super); |
1da177e4 LT |
1531 | } |
1532 | ||
1533 | static struct file_system_type iso9660_fs_type = { | |
1534 | .owner = THIS_MODULE, | |
1535 | .name = "iso9660", | |
152a0836 | 1536 | .mount = isofs_mount, |
1da177e4 LT |
1537 | .kill_sb = kill_block_super, |
1538 | .fs_flags = FS_REQUIRES_DEV, | |
1539 | }; | |
1540 | ||
1541 | static int __init init_iso9660_fs(void) | |
1542 | { | |
1543 | int err = init_inodecache(); | |
1544 | if (err) | |
1545 | goto out; | |
1546 | #ifdef CONFIG_ZISOFS | |
1547 | err = zisofs_init(); | |
1548 | if (err) | |
1549 | goto out1; | |
1550 | #endif | |
1551 | err = register_filesystem(&iso9660_fs_type); | |
1552 | if (err) | |
1553 | goto out2; | |
1554 | return 0; | |
1555 | out2: | |
1556 | #ifdef CONFIG_ZISOFS | |
1557 | zisofs_cleanup(); | |
1558 | out1: | |
1559 | #endif | |
1560 | destroy_inodecache(); | |
1561 | out: | |
1562 | return err; | |
1563 | } | |
1564 | ||
1565 | static void __exit exit_iso9660_fs(void) | |
1566 | { | |
1567 | unregister_filesystem(&iso9660_fs_type); | |
1568 | #ifdef CONFIG_ZISOFS | |
1569 | zisofs_cleanup(); | |
1570 | #endif | |
1571 | destroy_inodecache(); | |
1572 | } | |
1573 | ||
1574 | module_init(init_iso9660_fs) | |
1575 | module_exit(exit_iso9660_fs) | |
1576 | MODULE_LICENSE("GPL"); | |
1577 | /* Actual filesystem name is iso9660, as requested in filesystems.c */ | |
1578 | MODULE_ALIAS("iso9660"); |