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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * namei.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998-2004 Ben Fennema | |
14 | * (C) 1999-2000 Stelias Computing Inc | |
15 | * | |
16 | * HISTORY | |
17 | * | |
18 | * 12/12/98 blf Created. Split out the lookup code from dir.c | |
19 | * 04/19/99 blf link, mknod, symlink support | |
20 | */ | |
21 | ||
22 | #include "udfdecl.h" | |
23 | ||
24 | #include "udf_i.h" | |
25 | #include "udf_sb.h" | |
26 | #include <linux/string.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/quotaops.h> | |
31 | #include <linux/smp_lock.h> | |
32 | #include <linux/buffer_head.h> | |
e8edc6e0 | 33 | #include <linux/sched.h> |
1da177e4 LT |
34 | |
35 | static inline int udf_match(int len1, const char *name1, int len2, const char *name2) | |
36 | { | |
37 | if (len1 != len2) | |
38 | return 0; | |
39 | return !memcmp(name1, name2, len1); | |
40 | } | |
41 | ||
42 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
43 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, | |
44 | uint8_t *impuse, uint8_t *fileident) | |
45 | { | |
46 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag); | |
47 | uint16_t crc; | |
48 | uint8_t checksum = 0; | |
49 | int i; | |
50 | int offset; | |
51 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
52 | uint8_t lfi = cfi->lengthFileIdent; | |
53 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
54 | sizeof(struct fileIdentDesc); | |
55 | int adinicb = 0; | |
56 | ||
57 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
58 | adinicb = 1; | |
59 | ||
60 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
61 | ||
62 | if (impuse) | |
63 | { | |
64 | if (adinicb || (offset + liu < 0)) | |
65 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
66 | else if (offset >= 0) | |
67 | memcpy(fibh->ebh->b_data + offset, impuse, liu); | |
68 | else | |
69 | { | |
70 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
71 | memcpy(fibh->ebh->b_data, impuse - offset, liu + offset); | |
72 | } | |
73 | } | |
74 | ||
75 | offset += liu; | |
76 | ||
77 | if (fileident) | |
78 | { | |
79 | if (adinicb || (offset + lfi < 0)) | |
80 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
81 | else if (offset >= 0) | |
82 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); | |
83 | else | |
84 | { | |
85 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, -offset); | |
86 | memcpy(fibh->ebh->b_data, fileident - offset, lfi + offset); | |
87 | } | |
88 | } | |
89 | ||
90 | offset += lfi; | |
91 | ||
92 | if (adinicb || (offset + padlen < 0)) | |
93 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
94 | else if (offset >= 0) | |
95 | memset(fibh->ebh->b_data + offset, 0x00, padlen); | |
96 | else | |
97 | { | |
98 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
99 | memset(fibh->ebh->b_data, 0x00, padlen + offset); | |
100 | } | |
101 | ||
102 | crc = udf_crc((uint8_t *)cfi + sizeof(tag), sizeof(struct fileIdentDesc) - | |
103 | sizeof(tag), 0); | |
104 | ||
105 | if (fibh->sbh == fibh->ebh) | |
106 | crc = udf_crc((uint8_t *)sfi->impUse, | |
107 | crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc); | |
108 | else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) | |
109 | crc = udf_crc(fibh->ebh->b_data + sizeof(struct fileIdentDesc) + fibh->soffset, | |
110 | crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc); | |
111 | else | |
112 | { | |
113 | crc = udf_crc((uint8_t *)sfi->impUse, | |
114 | -fibh->soffset - sizeof(struct fileIdentDesc), crc); | |
115 | crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc); | |
116 | } | |
117 | ||
118 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
119 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
120 | ||
121 | for (i=0; i<16; i++) | |
122 | if (i != 4) | |
123 | checksum += ((uint8_t *)&cfi->descTag)[i]; | |
124 | ||
125 | cfi->descTag.tagChecksum = checksum; | |
126 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) | |
127 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, sizeof(struct fileIdentDesc)); | |
128 | else | |
129 | { | |
130 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
131 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
132 | sizeof(struct fileIdentDesc) + fibh->soffset); | |
133 | } | |
134 | ||
135 | if (adinicb) | |
136 | mark_inode_dirty(inode); | |
137 | else | |
138 | { | |
139 | if (fibh->sbh != fibh->ebh) | |
140 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
141 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
142 | } | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static struct fileIdentDesc * | |
147 | udf_find_entry(struct inode *dir, struct dentry *dentry, | |
148 | struct udf_fileident_bh *fibh, | |
149 | struct fileIdentDesc *cfi) | |
150 | { | |
151 | struct fileIdentDesc *fi=NULL; | |
152 | loff_t f_pos; | |
153 | int block, flen; | |
154 | char fname[UDF_NAME_LEN]; | |
155 | char *nameptr; | |
156 | uint8_t lfi; | |
157 | uint16_t liu; | |
ec471dc4 | 158 | loff_t size; |
ff116fc8 JK |
159 | kernel_lb_addr eloc; |
160 | uint32_t elen; | |
60448b1d | 161 | sector_t offset; |
ff116fc8 | 162 | struct extent_position epos = { NULL, 0, { 0, 0}}; |
1da177e4 | 163 | |
ec471dc4 | 164 | size = (udf_ext0_offset(dir) + dir->i_size) >> 2; |
1da177e4 LT |
165 | f_pos = (udf_ext0_offset(dir) >> 2); |
166 | ||
167 | fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
168 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
169 | fibh->sbh = fibh->ebh = NULL; | |
170 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), | |
ff116fc8 | 171 | &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 172 | { |
1da177e4 LT |
173 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
174 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) | |
175 | { | |
176 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) | |
ff116fc8 | 177 | epos.offset -= sizeof(short_ad); |
1da177e4 | 178 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 179 | epos.offset -= sizeof(long_ad); |
1da177e4 LT |
180 | } |
181 | else | |
182 | offset = 0; | |
183 | ||
184 | if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block))) | |
185 | { | |
3bf25cb4 | 186 | brelse(epos.bh); |
1da177e4 LT |
187 | return NULL; |
188 | } | |
189 | } | |
190 | else | |
191 | { | |
3bf25cb4 | 192 | brelse(epos.bh); |
1da177e4 LT |
193 | return NULL; |
194 | } | |
195 | ||
196 | while ( (f_pos < size) ) | |
197 | { | |
ff116fc8 | 198 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, &elen, &offset); |
1da177e4 LT |
199 | |
200 | if (!fi) | |
201 | { | |
202 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
203 | brelse(fibh->ebh); |
204 | brelse(fibh->sbh); | |
205 | brelse(epos.bh); | |
1da177e4 LT |
206 | return NULL; |
207 | } | |
208 | ||
209 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
210 | lfi = cfi->lengthFileIdent; | |
211 | ||
212 | if (fibh->sbh == fibh->ebh) | |
213 | { | |
214 | nameptr = fi->fileIdent + liu; | |
215 | } | |
216 | else | |
217 | { | |
218 | int poffset; /* Unpaded ending offset */ | |
219 | ||
220 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi; | |
221 | ||
222 | if (poffset >= lfi) | |
223 | nameptr = (uint8_t *)(fibh->ebh->b_data + poffset - lfi); | |
224 | else | |
225 | { | |
226 | nameptr = fname; | |
227 | memcpy(nameptr, fi->fileIdent + liu, lfi - poffset); | |
228 | memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset); | |
229 | } | |
230 | } | |
231 | ||
232 | if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 ) | |
233 | { | |
234 | if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE) ) | |
235 | continue; | |
236 | } | |
237 | ||
238 | if ( (cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0 ) | |
239 | { | |
240 | if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE) ) | |
241 | continue; | |
242 | } | |
243 | ||
244 | if (!lfi) | |
245 | continue; | |
246 | ||
247 | if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi))) | |
248 | { | |
249 | if (udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name)) | |
250 | { | |
3bf25cb4 | 251 | brelse(epos.bh); |
1da177e4 LT |
252 | return fi; |
253 | } | |
254 | } | |
255 | } | |
256 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
257 | brelse(fibh->ebh); |
258 | brelse(fibh->sbh); | |
259 | brelse(epos.bh); | |
1da177e4 LT |
260 | return NULL; |
261 | } | |
262 | ||
263 | /* | |
264 | * udf_lookup | |
265 | * | |
266 | * PURPOSE | |
267 | * Look-up the inode for a given name. | |
268 | * | |
269 | * DESCRIPTION | |
270 | * Required - lookup_dentry() will return -ENOTDIR if this routine is not | |
271 | * available for a directory. The filesystem is useless if this routine is | |
272 | * not available for at least the filesystem's root directory. | |
273 | * | |
274 | * This routine is passed an incomplete dentry - it must be completed by | |
275 | * calling d_add(dentry, inode). If the name does not exist, then the | |
276 | * specified inode must be set to null. An error should only be returned | |
277 | * when the lookup fails for a reason other than the name not existing. | |
278 | * Note that the directory inode semaphore is held during the call. | |
279 | * | |
280 | * Refer to lookup_dentry() in fs/namei.c | |
281 | * lookup_dentry() -> lookup() -> real_lookup() -> . | |
282 | * | |
283 | * PRE-CONDITIONS | |
284 | * dir Pointer to inode of parent directory. | |
285 | * dentry Pointer to dentry to complete. | |
286 | * nd Pointer to lookup nameidata | |
287 | * | |
288 | * POST-CONDITIONS | |
289 | * <return> Zero on success. | |
290 | * | |
291 | * HISTORY | |
292 | * July 1, 1997 - Andrew E. Mileski | |
293 | * Written, tested, and released. | |
294 | */ | |
295 | ||
296 | static struct dentry * | |
297 | udf_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) | |
298 | { | |
299 | struct inode *inode = NULL; | |
db9a369e | 300 | struct fileIdentDesc cfi; |
1da177e4 LT |
301 | struct udf_fileident_bh fibh; |
302 | ||
303 | if (dentry->d_name.len > UDF_NAME_LEN-2) | |
304 | return ERR_PTR(-ENAMETOOLONG); | |
305 | ||
306 | lock_kernel(); | |
307 | #ifdef UDF_RECOVERY | |
308 | /* temporary shorthand for specifying files by inode number */ | |
309 | if (!strncmp(dentry->d_name.name, ".B=", 3) ) | |
310 | { | |
311 | kernel_lb_addr lb = { 0, simple_strtoul(dentry->d_name.name+3, NULL, 0) }; | |
312 | inode = udf_iget(dir->i_sb, lb); | |
313 | if (!inode) | |
314 | { | |
315 | unlock_kernel(); | |
316 | return ERR_PTR(-EACCES); | |
317 | } | |
318 | } | |
319 | else | |
320 | #endif /* UDF_RECOVERY */ | |
321 | ||
db9a369e | 322 | if (udf_find_entry(dir, dentry, &fibh, &cfi)) |
1da177e4 LT |
323 | { |
324 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
325 | brelse(fibh.ebh); |
326 | brelse(fibh.sbh); | |
1da177e4 LT |
327 | |
328 | inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); | |
329 | if ( !inode ) | |
330 | { | |
331 | unlock_kernel(); | |
332 | return ERR_PTR(-EACCES); | |
333 | } | |
334 | } | |
335 | unlock_kernel(); | |
336 | d_add(dentry, inode); | |
337 | return NULL; | |
338 | } | |
339 | ||
340 | static struct fileIdentDesc * | |
341 | udf_add_entry(struct inode *dir, struct dentry *dentry, | |
342 | struct udf_fileident_bh *fibh, | |
343 | struct fileIdentDesc *cfi, int *err) | |
344 | { | |
345 | struct super_block *sb; | |
346 | struct fileIdentDesc *fi=NULL; | |
347 | char name[UDF_NAME_LEN], fname[UDF_NAME_LEN]; | |
348 | int namelen; | |
349 | loff_t f_pos; | |
350 | int flen; | |
351 | char *nameptr; | |
352 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
353 | int nfidlen; | |
354 | uint8_t lfi; | |
355 | uint16_t liu; | |
356 | int block; | |
ff116fc8 JK |
357 | kernel_lb_addr eloc; |
358 | uint32_t elen; | |
60448b1d | 359 | sector_t offset; |
ff116fc8 | 360 | struct extent_position epos = { NULL, 0, { 0, 0 }}; |
1da177e4 LT |
361 | |
362 | sb = dir->i_sb; | |
363 | ||
364 | if (dentry) | |
365 | { | |
366 | if (!dentry->d_name.len) | |
367 | { | |
368 | *err = -EINVAL; | |
369 | return NULL; | |
370 | } | |
371 | ||
372 | if ( !(namelen = udf_put_filename(sb, dentry->d_name.name, name, dentry->d_name.len))) | |
373 | { | |
374 | *err = -ENAMETOOLONG; | |
375 | return NULL; | |
376 | } | |
377 | } | |
378 | else | |
379 | namelen = 0; | |
380 | ||
381 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
382 | ||
383 | f_pos = (udf_ext0_offset(dir) >> 2); | |
384 | ||
385 | fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
386 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
387 | fibh->sbh = fibh->ebh = NULL; | |
388 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), | |
ff116fc8 | 389 | &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 390 | { |
1da177e4 LT |
391 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
392 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) | |
393 | { | |
394 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) | |
ff116fc8 | 395 | epos.offset -= sizeof(short_ad); |
1da177e4 | 396 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 397 | epos.offset -= sizeof(long_ad); |
1da177e4 LT |
398 | } |
399 | else | |
400 | offset = 0; | |
401 | ||
402 | if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block))) | |
403 | { | |
3bf25cb4 | 404 | brelse(epos.bh); |
1da177e4 LT |
405 | *err = -EIO; |
406 | return NULL; | |
407 | } | |
408 | ||
409 | block = UDF_I_LOCATION(dir).logicalBlockNum; | |
410 | ||
411 | } | |
412 | else | |
413 | { | |
414 | block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0); | |
415 | fibh->sbh = fibh->ebh = NULL; | |
416 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
417 | goto add; | |
418 | } | |
419 | ||
420 | while ( (f_pos < size) ) | |
421 | { | |
ff116fc8 | 422 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, &elen, &offset); |
1da177e4 LT |
423 | |
424 | if (!fi) | |
425 | { | |
426 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
427 | brelse(fibh->ebh); |
428 | brelse(fibh->sbh); | |
429 | brelse(epos.bh); | |
1da177e4 LT |
430 | *err = -EIO; |
431 | return NULL; | |
432 | } | |
433 | ||
434 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
435 | lfi = cfi->lengthFileIdent; | |
436 | ||
437 | if (fibh->sbh == fibh->ebh) | |
438 | nameptr = fi->fileIdent + liu; | |
439 | else | |
440 | { | |
441 | int poffset; /* Unpaded ending offset */ | |
442 | ||
443 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi; | |
444 | ||
445 | if (poffset >= lfi) | |
446 | nameptr = (char *)(fibh->ebh->b_data + poffset - lfi); | |
447 | else | |
448 | { | |
449 | nameptr = fname; | |
450 | memcpy(nameptr, fi->fileIdent + liu, lfi - poffset); | |
451 | memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset); | |
452 | } | |
453 | } | |
454 | ||
455 | if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 ) | |
456 | { | |
457 | if (((sizeof(struct fileIdentDesc) + liu + lfi + 3) & ~3) == nfidlen) | |
458 | { | |
3bf25cb4 | 459 | brelse(epos.bh); |
1da177e4 LT |
460 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
461 | cfi->fileVersionNum = cpu_to_le16(1); | |
462 | cfi->fileCharacteristics = 0; | |
463 | cfi->lengthFileIdent = namelen; | |
464 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
465 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) | |
466 | return fi; | |
467 | else | |
468 | { | |
469 | *err = -EIO; | |
470 | return NULL; | |
471 | } | |
472 | } | |
473 | } | |
474 | ||
475 | if (!lfi || !dentry) | |
476 | continue; | |
477 | ||
478 | if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)) && | |
479 | udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name)) | |
480 | { | |
481 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
482 | brelse(fibh->ebh); |
483 | brelse(fibh->sbh); | |
484 | brelse(epos.bh); | |
1da177e4 LT |
485 | *err = -EEXIST; |
486 | return NULL; | |
487 | } | |
488 | } | |
489 | ||
490 | add: | |
491 | f_pos += nfidlen; | |
492 | ||
493 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB && | |
494 | sb->s_blocksize - fibh->eoffset < nfidlen) | |
495 | { | |
3bf25cb4 | 496 | brelse(epos.bh); |
ff116fc8 | 497 | epos.bh = NULL; |
1da177e4 LT |
498 | fibh->soffset -= udf_ext0_offset(dir); |
499 | fibh->eoffset -= udf_ext0_offset(dir); | |
500 | f_pos -= (udf_ext0_offset(dir) >> 2); | |
501 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
502 | brelse(fibh->ebh); |
503 | brelse(fibh->sbh); | |
1da177e4 LT |
504 | if (!(fibh->sbh = fibh->ebh = udf_expand_dir_adinicb(dir, &block, err))) |
505 | return NULL; | |
ff116fc8 | 506 | epos.block = UDF_I_LOCATION(dir); |
1da177e4 LT |
507 | eloc.logicalBlockNum = block; |
508 | eloc.partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum; | |
509 | elen = dir->i_sb->s_blocksize; | |
ff116fc8 | 510 | epos.offset = udf_file_entry_alloc_offset(dir); |
1da177e4 | 511 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 512 | epos.offset += sizeof(short_ad); |
1da177e4 | 513 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 514 | epos.offset += sizeof(long_ad); |
1da177e4 LT |
515 | } |
516 | ||
517 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) | |
518 | { | |
519 | fibh->soffset = fibh->eoffset; | |
520 | fibh->eoffset += nfidlen; | |
521 | if (fibh->sbh != fibh->ebh) | |
522 | { | |
3bf25cb4 | 523 | brelse(fibh->sbh); |
1da177e4 LT |
524 | fibh->sbh = fibh->ebh; |
525 | } | |
526 | ||
527 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
528 | { | |
529 | block = UDF_I_LOCATION(dir).logicalBlockNum; | |
530 | fi = (struct fileIdentDesc *)(UDF_I_DATA(dir) + fibh->soffset - udf_ext0_offset(dir) + UDF_I_LENEATTR(dir)); | |
531 | } | |
532 | else | |
533 | { | |
534 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
535 | dir->i_sb->s_blocksize_bits); | |
536 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data + fibh->soffset); | |
537 | } | |
538 | } | |
539 | else | |
540 | { | |
541 | fibh->soffset = fibh->eoffset - sb->s_blocksize; | |
542 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
543 | if (fibh->sbh != fibh->ebh) | |
544 | { | |
3bf25cb4 | 545 | brelse(fibh->sbh); |
1da177e4 LT |
546 | fibh->sbh = fibh->ebh; |
547 | } | |
548 | ||
549 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
550 | dir->i_sb->s_blocksize_bits); | |
551 | ||
552 | if (!(fibh->ebh = udf_bread(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 1, err))) | |
553 | { | |
3bf25cb4 JK |
554 | brelse(epos.bh); |
555 | brelse(fibh->sbh); | |
1da177e4 LT |
556 | return NULL; |
557 | } | |
558 | ||
559 | if (!(fibh->soffset)) | |
560 | { | |
ff116fc8 | 561 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
1da177e4 LT |
562 | (EXT_RECORDED_ALLOCATED >> 30)) |
563 | { | |
564 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
565 | dir->i_sb->s_blocksize_bits); | |
566 | } | |
567 | else | |
568 | block ++; | |
569 | ||
3bf25cb4 | 570 | brelse(fibh->sbh); |
1da177e4 LT |
571 | fibh->sbh = fibh->ebh; |
572 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
573 | } | |
574 | else | |
575 | { | |
576 | fi = (struct fileIdentDesc *) | |
577 | (fibh->sbh->b_data + sb->s_blocksize + fibh->soffset); | |
578 | } | |
579 | } | |
580 | ||
581 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
582 | if (UDF_SB_UDFREV(sb) >= 0x0200) | |
583 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, sizeof(tag)); | |
584 | else | |
585 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, sizeof(tag)); | |
586 | cfi->fileVersionNum = cpu_to_le16(1); | |
587 | cfi->lengthFileIdent = namelen; | |
588 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
589 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) | |
590 | { | |
3bf25cb4 | 591 | brelse(epos.bh); |
1da177e4 LT |
592 | dir->i_size += nfidlen; |
593 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
594 | UDF_I_LENALLOC(dir) += nfidlen; | |
595 | mark_inode_dirty(dir); | |
596 | return fi; | |
597 | } | |
598 | else | |
599 | { | |
3bf25cb4 | 600 | brelse(epos.bh); |
1da177e4 | 601 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
602 | brelse(fibh->ebh); |
603 | brelse(fibh->sbh); | |
1da177e4 LT |
604 | *err = -EIO; |
605 | return NULL; | |
606 | } | |
607 | } | |
608 | ||
609 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
610 | struct udf_fileident_bh *fibh, struct fileIdentDesc *cfi) | |
611 | { | |
612 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
613 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
614 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
615 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); | |
616 | } | |
617 | ||
618 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd) | |
619 | { | |
620 | struct udf_fileident_bh fibh; | |
621 | struct inode *inode; | |
622 | struct fileIdentDesc cfi, *fi; | |
623 | int err; | |
624 | ||
625 | lock_kernel(); | |
626 | inode = udf_new_inode(dir, mode, &err); | |
627 | if (!inode) | |
628 | { | |
629 | unlock_kernel(); | |
630 | return err; | |
631 | } | |
632 | ||
633 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
634 | inode->i_data.a_ops = &udf_adinicb_aops; | |
635 | else | |
636 | inode->i_data.a_ops = &udf_aops; | |
637 | inode->i_op = &udf_file_inode_operations; | |
638 | inode->i_fop = &udf_file_operations; | |
639 | inode->i_mode = mode; | |
640 | mark_inode_dirty(inode); | |
641 | ||
642 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) | |
643 | { | |
644 | inode->i_nlink --; | |
645 | mark_inode_dirty(inode); | |
646 | iput(inode); | |
647 | unlock_kernel(); | |
648 | return err; | |
649 | } | |
650 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
651 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
652 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = | |
653 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
654 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
655 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
656 | { | |
657 | mark_inode_dirty(dir); | |
658 | } | |
659 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
660 | brelse(fibh.ebh); |
661 | brelse(fibh.sbh); | |
1da177e4 LT |
662 | unlock_kernel(); |
663 | d_instantiate(dentry, inode); | |
664 | return 0; | |
665 | } | |
666 | ||
667 | static int udf_mknod(struct inode * dir, struct dentry * dentry, int mode, dev_t rdev) | |
668 | { | |
669 | struct inode * inode; | |
670 | struct udf_fileident_bh fibh; | |
671 | struct fileIdentDesc cfi, *fi; | |
672 | int err; | |
673 | ||
674 | if (!old_valid_dev(rdev)) | |
675 | return -EINVAL; | |
676 | ||
677 | lock_kernel(); | |
678 | err = -EIO; | |
679 | inode = udf_new_inode(dir, mode, &err); | |
680 | if (!inode) | |
681 | goto out; | |
682 | ||
683 | inode->i_uid = current->fsuid; | |
684 | init_special_inode(inode, mode, rdev); | |
685 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) | |
686 | { | |
687 | inode->i_nlink --; | |
688 | mark_inode_dirty(inode); | |
689 | iput(inode); | |
690 | unlock_kernel(); | |
691 | return err; | |
692 | } | |
693 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
694 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
695 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = | |
696 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
697 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
698 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
699 | { | |
700 | mark_inode_dirty(dir); | |
701 | } | |
702 | mark_inode_dirty(inode); | |
703 | ||
704 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
705 | brelse(fibh.ebh); |
706 | brelse(fibh.sbh); | |
1da177e4 LT |
707 | d_instantiate(dentry, inode); |
708 | err = 0; | |
709 | out: | |
710 | unlock_kernel(); | |
711 | return err; | |
712 | } | |
713 | ||
714 | static int udf_mkdir(struct inode * dir, struct dentry * dentry, int mode) | |
715 | { | |
716 | struct inode * inode; | |
717 | struct udf_fileident_bh fibh; | |
718 | struct fileIdentDesc cfi, *fi; | |
719 | int err; | |
720 | ||
721 | lock_kernel(); | |
722 | err = -EMLINK; | |
723 | if (dir->i_nlink >= (256<<sizeof(dir->i_nlink))-1) | |
724 | goto out; | |
725 | ||
726 | err = -EIO; | |
727 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
728 | if (!inode) | |
729 | goto out; | |
730 | ||
731 | inode->i_op = &udf_dir_inode_operations; | |
732 | inode->i_fop = &udf_dir_operations; | |
733 | if (!(fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err))) | |
734 | { | |
735 | inode->i_nlink--; | |
736 | mark_inode_dirty(inode); | |
737 | iput(inode); | |
738 | goto out; | |
739 | } | |
740 | inode->i_nlink = 2; | |
741 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
742 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir)); | |
743 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = | |
744 | cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL); | |
745 | cfi.fileCharacteristics = FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
746 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); | |
3bf25cb4 | 747 | brelse(fibh.sbh); |
1da177e4 LT |
748 | inode->i_mode = S_IFDIR | mode; |
749 | if (dir->i_mode & S_ISGID) | |
750 | inode->i_mode |= S_ISGID; | |
751 | mark_inode_dirty(inode); | |
752 | ||
753 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) | |
754 | { | |
755 | inode->i_nlink = 0; | |
756 | mark_inode_dirty(inode); | |
757 | iput(inode); | |
758 | goto out; | |
759 | } | |
760 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
761 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
762 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = | |
763 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
764 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; | |
765 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 766 | inc_nlink(dir); |
1da177e4 LT |
767 | mark_inode_dirty(dir); |
768 | d_instantiate(dentry, inode); | |
769 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
770 | brelse(fibh.ebh); |
771 | brelse(fibh.sbh); | |
1da177e4 LT |
772 | err = 0; |
773 | out: | |
774 | unlock_kernel(); | |
775 | return err; | |
776 | } | |
777 | ||
778 | static int empty_dir(struct inode *dir) | |
779 | { | |
780 | struct fileIdentDesc *fi, cfi; | |
781 | struct udf_fileident_bh fibh; | |
782 | loff_t f_pos; | |
783 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
784 | int block; | |
ff116fc8 JK |
785 | kernel_lb_addr eloc; |
786 | uint32_t elen; | |
60448b1d | 787 | sector_t offset; |
ff116fc8 | 788 | struct extent_position epos = { NULL, 0, { 0, 0}}; |
1da177e4 LT |
789 | |
790 | f_pos = (udf_ext0_offset(dir) >> 2); | |
791 | ||
792 | fibh.soffset = fibh.eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
793 | ||
794 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
795 | fibh.sbh = fibh.ebh = NULL; | |
796 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), | |
ff116fc8 | 797 | &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 798 | { |
1da177e4 LT |
799 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
800 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) | |
801 | { | |
802 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) | |
ff116fc8 | 803 | epos.offset -= sizeof(short_ad); |
1da177e4 | 804 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 805 | epos.offset -= sizeof(long_ad); |
1da177e4 LT |
806 | } |
807 | else | |
808 | offset = 0; | |
809 | ||
810 | if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block))) | |
811 | { | |
3bf25cb4 | 812 | brelse(epos.bh); |
1da177e4 LT |
813 | return 0; |
814 | } | |
815 | } | |
816 | else | |
817 | { | |
3bf25cb4 | 818 | brelse(epos.bh); |
1da177e4 LT |
819 | return 0; |
820 | } | |
821 | ||
822 | ||
823 | while ( (f_pos < size) ) | |
824 | { | |
ff116fc8 | 825 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, &elen, &offset); |
1da177e4 LT |
826 | |
827 | if (!fi) | |
828 | { | |
829 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
830 | brelse(fibh.ebh); |
831 | brelse(fibh.sbh); | |
832 | brelse(epos.bh); | |
1da177e4 LT |
833 | return 0; |
834 | } | |
835 | ||
836 | if (cfi.lengthFileIdent && (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) | |
837 | { | |
838 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
839 | brelse(fibh.ebh); |
840 | brelse(fibh.sbh); | |
841 | brelse(epos.bh); | |
1da177e4 LT |
842 | return 0; |
843 | } | |
844 | } | |
845 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
846 | brelse(fibh.ebh); |
847 | brelse(fibh.sbh); | |
848 | brelse(epos.bh); | |
1da177e4 LT |
849 | return 1; |
850 | } | |
851 | ||
852 | static int udf_rmdir(struct inode * dir, struct dentry * dentry) | |
853 | { | |
854 | int retval; | |
855 | struct inode * inode = dentry->d_inode; | |
856 | struct udf_fileident_bh fibh; | |
857 | struct fileIdentDesc *fi, cfi; | |
858 | kernel_lb_addr tloc; | |
859 | ||
860 | retval = -ENOENT; | |
861 | lock_kernel(); | |
862 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
863 | if (!fi) | |
864 | goto out; | |
865 | ||
866 | retval = -EIO; | |
867 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
868 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
869 | goto end_rmdir; | |
870 | retval = -ENOTEMPTY; | |
871 | if (!empty_dir(inode)) | |
872 | goto end_rmdir; | |
873 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
874 | if (retval) | |
875 | goto end_rmdir; | |
876 | if (inode->i_nlink != 2) | |
877 | udf_warning(inode->i_sb, "udf_rmdir", | |
878 | "empty directory has nlink != 2 (%d)", | |
879 | inode->i_nlink); | |
ce71ec36 | 880 | clear_nlink(inode); |
1da177e4 | 881 | inode->i_size = 0; |
c007c06e | 882 | inode_dec_link_count(dir); |
1da177e4 LT |
883 | inode->i_ctime = dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); |
884 | mark_inode_dirty(dir); | |
885 | ||
886 | end_rmdir: | |
887 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
888 | brelse(fibh.ebh); |
889 | brelse(fibh.sbh); | |
1da177e4 LT |
890 | out: |
891 | unlock_kernel(); | |
892 | return retval; | |
893 | } | |
894 | ||
895 | static int udf_unlink(struct inode * dir, struct dentry * dentry) | |
896 | { | |
897 | int retval; | |
898 | struct inode * inode = dentry->d_inode; | |
899 | struct udf_fileident_bh fibh; | |
900 | struct fileIdentDesc *fi; | |
901 | struct fileIdentDesc cfi; | |
902 | kernel_lb_addr tloc; | |
903 | ||
904 | retval = -ENOENT; | |
905 | lock_kernel(); | |
906 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
907 | if (!fi) | |
908 | goto out; | |
909 | ||
910 | retval = -EIO; | |
911 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
912 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
913 | goto end_unlink; | |
914 | ||
915 | if (!inode->i_nlink) | |
916 | { | |
917 | udf_debug("Deleting nonexistent file (%lu), %d\n", | |
918 | inode->i_ino, inode->i_nlink); | |
919 | inode->i_nlink = 1; | |
920 | } | |
921 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
922 | if (retval) | |
923 | goto end_unlink; | |
924 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
925 | mark_inode_dirty(dir); | |
9a53c3a7 | 926 | inode_dec_link_count(inode); |
1da177e4 LT |
927 | inode->i_ctime = dir->i_ctime; |
928 | retval = 0; | |
929 | ||
930 | end_unlink: | |
931 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
932 | brelse(fibh.ebh); |
933 | brelse(fibh.sbh); | |
1da177e4 LT |
934 | out: |
935 | unlock_kernel(); | |
936 | return retval; | |
937 | } | |
938 | ||
939 | static int udf_symlink(struct inode * dir, struct dentry * dentry, const char * symname) | |
940 | { | |
941 | struct inode * inode; | |
942 | struct pathComponent *pc; | |
943 | char *compstart; | |
944 | struct udf_fileident_bh fibh; | |
ff116fc8 | 945 | struct extent_position epos = { NULL, 0, {0, 0}}; |
1da177e4 LT |
946 | int eoffset, elen = 0; |
947 | struct fileIdentDesc *fi; | |
948 | struct fileIdentDesc cfi; | |
949 | char *ea; | |
950 | int err; | |
951 | int block; | |
952 | char name[UDF_NAME_LEN]; | |
953 | int namelen; | |
954 | ||
955 | lock_kernel(); | |
956 | if (!(inode = udf_new_inode(dir, S_IFLNK, &err))) | |
957 | goto out; | |
958 | ||
959 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
960 | inode->i_data.a_ops = &udf_symlink_aops; | |
961 | inode->i_op = &page_symlink_inode_operations; | |
962 | ||
963 | if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB) | |
964 | { | |
ff116fc8 JK |
965 | kernel_lb_addr eloc; |
966 | uint32_t elen; | |
1da177e4 LT |
967 | |
968 | block = udf_new_block(inode->i_sb, inode, | |
969 | UDF_I_LOCATION(inode).partitionReferenceNum, | |
970 | UDF_I_LOCATION(inode).logicalBlockNum, &err); | |
971 | if (!block) | |
972 | goto out_no_entry; | |
ff116fc8 JK |
973 | epos.block = UDF_I_LOCATION(inode); |
974 | epos.offset = udf_file_entry_alloc_offset(inode); | |
975 | epos.bh = NULL; | |
1da177e4 LT |
976 | eloc.logicalBlockNum = block; |
977 | eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; | |
978 | elen = inode->i_sb->s_blocksize; | |
979 | UDF_I_LENEXTENTS(inode) = elen; | |
ff116fc8 | 980 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 981 | brelse(epos.bh); |
1da177e4 LT |
982 | |
983 | block = udf_get_pblock(inode->i_sb, block, | |
984 | UDF_I_LOCATION(inode).partitionReferenceNum, 0); | |
ff116fc8 JK |
985 | epos.bh = udf_tread(inode->i_sb, block); |
986 | lock_buffer(epos.bh); | |
987 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
988 | set_buffer_uptodate(epos.bh); | |
989 | unlock_buffer(epos.bh); | |
990 | mark_buffer_dirty_inode(epos.bh, inode); | |
991 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
1da177e4 LT |
992 | } |
993 | else | |
994 | ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode); | |
995 | ||
996 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
997 | pc = (struct pathComponent *)ea; | |
998 | ||
999 | if (*symname == '/') | |
1000 | { | |
1001 | do | |
1002 | { | |
1003 | symname++; | |
1004 | } while (*symname == '/'); | |
1005 | ||
1006 | pc->componentType = 1; | |
1007 | pc->lengthComponentIdent = 0; | |
1008 | pc->componentFileVersionNum = 0; | |
1009 | pc += sizeof(struct pathComponent); | |
1010 | elen += sizeof(struct pathComponent); | |
1011 | } | |
1012 | ||
1013 | err = -ENAMETOOLONG; | |
1014 | ||
1015 | while (*symname) | |
1016 | { | |
1017 | if (elen + sizeof(struct pathComponent) > eoffset) | |
1018 | goto out_no_entry; | |
1019 | ||
1020 | pc = (struct pathComponent *)(ea + elen); | |
1021 | ||
1022 | compstart = (char *)symname; | |
1023 | ||
1024 | do | |
1025 | { | |
1026 | symname++; | |
1027 | } while (*symname && *symname != '/'); | |
1028 | ||
1029 | pc->componentType = 5; | |
1030 | pc->lengthComponentIdent = 0; | |
1031 | pc->componentFileVersionNum = 0; | |
1032 | if (compstart[0] == '.') | |
1033 | { | |
1034 | if ((symname-compstart) == 1) | |
1035 | pc->componentType = 4; | |
1036 | else if ((symname-compstart) == 2 && compstart[1] == '.') | |
1037 | pc->componentType = 3; | |
1038 | } | |
1039 | ||
1040 | if (pc->componentType == 5) | |
1041 | { | |
1042 | if ( !(namelen = udf_put_filename(inode->i_sb, compstart, name, symname-compstart))) | |
1043 | goto out_no_entry; | |
1044 | ||
1045 | if (elen + sizeof(struct pathComponent) + namelen > eoffset) | |
1046 | goto out_no_entry; | |
1047 | else | |
1048 | pc->lengthComponentIdent = namelen; | |
1049 | ||
1050 | memcpy(pc->componentIdent, name, namelen); | |
1051 | } | |
1052 | ||
1053 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1054 | ||
1055 | if (*symname) | |
1056 | { | |
1057 | do | |
1058 | { | |
1059 | symname++; | |
1060 | } while (*symname == '/'); | |
1061 | } | |
1062 | } | |
1063 | ||
3bf25cb4 | 1064 | brelse(epos.bh); |
1da177e4 LT |
1065 | inode->i_size = elen; |
1066 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
1067 | UDF_I_LENALLOC(inode) = inode->i_size; | |
1068 | mark_inode_dirty(inode); | |
1069 | ||
1070 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) | |
1071 | goto out_no_entry; | |
1072 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
1073 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
1074 | if (UDF_SB_LVIDBH(inode->i_sb)) | |
1075 | { | |
1076 | struct logicalVolHeaderDesc *lvhd; | |
1077 | uint64_t uniqueID; | |
1078 | lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse); | |
1079 | uniqueID = le64_to_cpu(lvhd->uniqueID); | |
1080 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = | |
1081 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1082 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) | |
1083 | uniqueID += 16; | |
1084 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1085 | mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb)); | |
1086 | } | |
1087 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
1088 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
1089 | { | |
1090 | mark_inode_dirty(dir); | |
1091 | } | |
1092 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
1093 | brelse(fibh.ebh); |
1094 | brelse(fibh.sbh); | |
1da177e4 LT |
1095 | d_instantiate(dentry, inode); |
1096 | err = 0; | |
1097 | ||
1098 | out: | |
1099 | unlock_kernel(); | |
1100 | return err; | |
1101 | ||
1102 | out_no_entry: | |
9a53c3a7 | 1103 | inode_dec_link_count(inode); |
1da177e4 LT |
1104 | iput(inode); |
1105 | goto out; | |
1106 | } | |
1107 | ||
1108 | static int udf_link(struct dentry * old_dentry, struct inode * dir, | |
1109 | struct dentry *dentry) | |
1110 | { | |
1111 | struct inode *inode = old_dentry->d_inode; | |
1112 | struct udf_fileident_bh fibh; | |
1113 | struct fileIdentDesc cfi, *fi; | |
1114 | int err; | |
1115 | ||
1116 | lock_kernel(); | |
1117 | if (inode->i_nlink >= (256<<sizeof(inode->i_nlink))-1) | |
1118 | { | |
1119 | unlock_kernel(); | |
1120 | return -EMLINK; | |
1121 | } | |
1122 | ||
1123 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) | |
1124 | { | |
1125 | unlock_kernel(); | |
1126 | return err; | |
1127 | } | |
1128 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
1129 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
1130 | if (UDF_SB_LVIDBH(inode->i_sb)) | |
1131 | { | |
1132 | struct logicalVolHeaderDesc *lvhd; | |
1133 | uint64_t uniqueID; | |
1134 | lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse); | |
1135 | uniqueID = le64_to_cpu(lvhd->uniqueID); | |
1136 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = | |
1137 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1138 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) | |
1139 | uniqueID += 16; | |
1140 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1141 | mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb)); | |
1142 | } | |
1143 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
1144 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
1145 | { | |
1146 | mark_inode_dirty(dir); | |
1147 | } | |
1148 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
1149 | brelse(fibh.ebh); |
1150 | brelse(fibh.sbh); | |
d8c76e6f | 1151 | inc_nlink(inode); |
1da177e4 LT |
1152 | inode->i_ctime = current_fs_time(inode->i_sb); |
1153 | mark_inode_dirty(inode); | |
1154 | atomic_inc(&inode->i_count); | |
1155 | d_instantiate(dentry, inode); | |
1156 | unlock_kernel(); | |
1157 | return 0; | |
1158 | } | |
1159 | ||
1160 | /* Anybody can rename anything with this: the permission checks are left to the | |
1161 | * higher-level routines. | |
1162 | */ | |
1163 | static int udf_rename (struct inode * old_dir, struct dentry * old_dentry, | |
1164 | struct inode * new_dir, struct dentry * new_dentry) | |
1165 | { | |
1166 | struct inode * old_inode = old_dentry->d_inode; | |
1167 | struct inode * new_inode = new_dentry->d_inode; | |
1168 | struct udf_fileident_bh ofibh, nfibh; | |
1169 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL, ocfi, ncfi; | |
1170 | struct buffer_head *dir_bh = NULL; | |
1171 | int retval = -ENOENT; | |
1172 | kernel_lb_addr tloc; | |
1173 | ||
1174 | lock_kernel(); | |
1175 | if ((ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi))) | |
1176 | { | |
1177 | if (ofibh.sbh != ofibh.ebh) | |
3bf25cb4 JK |
1178 | brelse(ofibh.ebh); |
1179 | brelse(ofibh.sbh); | |
1da177e4 LT |
1180 | } |
1181 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1182 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
1183 | != old_inode->i_ino) | |
1184 | goto end_rename; | |
1185 | ||
1186 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
1187 | if (nfi) | |
1188 | { | |
1189 | if (!new_inode) | |
1190 | { | |
1191 | if (nfibh.sbh != nfibh.ebh) | |
3bf25cb4 JK |
1192 | brelse(nfibh.ebh); |
1193 | brelse(nfibh.sbh); | |
1da177e4 LT |
1194 | nfi = NULL; |
1195 | } | |
1196 | } | |
1197 | if (S_ISDIR(old_inode->i_mode)) | |
1198 | { | |
1199 | uint32_t offset = udf_ext0_offset(old_inode); | |
1200 | ||
1201 | if (new_inode) | |
1202 | { | |
1203 | retval = -ENOTEMPTY; | |
1204 | if (!empty_dir(new_inode)) | |
1205 | goto end_rename; | |
1206 | } | |
1207 | retval = -EIO; | |
1208 | if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) | |
1209 | { | |
1210 | dir_fi = udf_get_fileident(UDF_I_DATA(old_inode) - | |
1211 | (UDF_I_EFE(old_inode) ? | |
1212 | sizeof(struct extendedFileEntry) : | |
1213 | sizeof(struct fileEntry)), | |
1214 | old_inode->i_sb->s_blocksize, &offset); | |
1215 | } | |
1216 | else | |
1217 | { | |
1218 | dir_bh = udf_bread(old_inode, 0, 0, &retval); | |
1219 | if (!dir_bh) | |
1220 | goto end_rename; | |
1221 | dir_fi = udf_get_fileident(dir_bh->b_data, old_inode->i_sb->s_blocksize, &offset); | |
1222 | } | |
1223 | if (!dir_fi) | |
1224 | goto end_rename; | |
1225 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
1226 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) | |
1227 | != old_dir->i_ino) | |
1228 | goto end_rename; | |
1229 | ||
1230 | retval = -EMLINK; | |
1231 | if (!new_inode && new_dir->i_nlink >= (256<<sizeof(new_dir->i_nlink))-1) | |
1232 | goto end_rename; | |
1233 | } | |
1234 | if (!nfi) | |
1235 | { | |
1236 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, &retval); | |
1237 | if (!nfi) | |
1238 | goto end_rename; | |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | * Like most other Unix systems, set the ctime for inodes on a | |
1243 | * rename. | |
1244 | */ | |
1245 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1246 | mark_inode_dirty(old_inode); | |
1247 | ||
1248 | /* | |
1249 | * ok, that's it | |
1250 | */ | |
1251 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1252 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1253 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1254 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1255 | ||
1256 | /* The old fid may have moved - find it again */ | |
1257 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1258 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1259 | ||
1260 | if (new_inode) | |
1261 | { | |
1da177e4 | 1262 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1263 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1264 | } |
1265 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1266 | mark_inode_dirty(old_dir); | |
1267 | ||
1268 | if (dir_fi) | |
1269 | { | |
1270 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir)); | |
1271 | udf_update_tag((char *)dir_fi, (sizeof(struct fileIdentDesc) + | |
1272 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
1273 | if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) | |
1274 | { | |
1275 | mark_inode_dirty(old_inode); | |
1276 | } | |
1277 | else | |
1278 | mark_buffer_dirty_inode(dir_bh, old_inode); | |
9a53c3a7 | 1279 | inode_dec_link_count(old_dir); |
1da177e4 LT |
1280 | if (new_inode) |
1281 | { | |
9a53c3a7 | 1282 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1283 | } |
1284 | else | |
1285 | { | |
d8c76e6f | 1286 | inc_nlink(new_dir); |
1da177e4 LT |
1287 | mark_inode_dirty(new_dir); |
1288 | } | |
1289 | } | |
1290 | ||
1291 | if (ofi) | |
1292 | { | |
1293 | if (ofibh.sbh != ofibh.ebh) | |
3bf25cb4 JK |
1294 | brelse(ofibh.ebh); |
1295 | brelse(ofibh.sbh); | |
1da177e4 LT |
1296 | } |
1297 | ||
1298 | retval = 0; | |
1299 | ||
1300 | end_rename: | |
3bf25cb4 | 1301 | brelse(dir_bh); |
1da177e4 LT |
1302 | if (nfi) |
1303 | { | |
1304 | if (nfibh.sbh != nfibh.ebh) | |
3bf25cb4 JK |
1305 | brelse(nfibh.ebh); |
1306 | brelse(nfibh.sbh); | |
1da177e4 LT |
1307 | } |
1308 | unlock_kernel(); | |
1309 | return retval; | |
1310 | } | |
1311 | ||
c5ef1c42 | 1312 | const struct inode_operations udf_dir_inode_operations = { |
1da177e4 LT |
1313 | .lookup = udf_lookup, |
1314 | .create = udf_create, | |
1315 | .link = udf_link, | |
1316 | .unlink = udf_unlink, | |
1317 | .symlink = udf_symlink, | |
1318 | .mkdir = udf_mkdir, | |
1319 | .rmdir = udf_rmdir, | |
1320 | .mknod = udf_mknod, | |
1321 | .rename = udf_rename, | |
1322 | }; |