Commit | Line | Data |
---|---|---|
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 | 34 | |
cb00ea35 CG |
35 | static inline int udf_match(int len1, const char *name1, int len2, |
36 | const char *name2) | |
1da177e4 LT |
37 | { |
38 | if (len1 != len2) | |
39 | return 0; | |
28de7948 | 40 | |
1da177e4 LT |
41 | return !memcmp(name1, name2, len1); |
42 | } | |
43 | ||
44 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 | 45 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
4b11111a | 46 | uint8_t *impuse, uint8_t *fileident) |
1da177e4 LT |
47 | { |
48 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag); | |
49 | uint16_t crc; | |
1da177e4 LT |
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 - | |
28de7948 | 54 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
55 | int adinicb = 0; |
56 | ||
c0b34438 | 57 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 LT |
58 | adinicb = 1; |
59 | ||
60 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
61 | ||
cb00ea35 | 62 | if (impuse) { |
28de7948 CG |
63 | if (adinicb || (offset + liu < 0)) { |
64 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
65 | } else if (offset >= 0) { | |
1da177e4 | 66 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
28de7948 CG |
67 | } else { |
68 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
4b11111a MS |
69 | memcpy(fibh->ebh->b_data, impuse - offset, |
70 | liu + offset); | |
1da177e4 LT |
71 | } |
72 | } | |
73 | ||
74 | offset += liu; | |
75 | ||
cb00ea35 | 76 | if (fileident) { |
28de7948 CG |
77 | if (adinicb || (offset + lfi < 0)) { |
78 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
79 | } else if (offset >= 0) { | |
1da177e4 | 80 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 81 | } else { |
4b11111a MS |
82 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
83 | -offset); | |
84 | memcpy(fibh->ebh->b_data, fileident - offset, | |
85 | lfi + offset); | |
1da177e4 LT |
86 | } |
87 | } | |
88 | ||
89 | offset += lfi; | |
90 | ||
28de7948 CG |
91 | if (adinicb || (offset + padlen < 0)) { |
92 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
93 | } else if (offset >= 0) { | |
1da177e4 | 94 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
95 | } else { |
96 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
97 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
98 | } | |
99 | ||
28de7948 CG |
100 | crc = udf_crc((uint8_t *)cfi + sizeof(tag), |
101 | sizeof(struct fileIdentDesc) - sizeof(tag), 0); | |
102 | ||
103 | if (fibh->sbh == fibh->ebh) { | |
104 | crc = udf_crc((uint8_t *)sfi->impUse, | |
4b11111a MS |
105 | crclen + sizeof(tag) - |
106 | sizeof(struct fileIdentDesc), crc); | |
28de7948 | 107 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
4b11111a MS |
108 | crc = udf_crc(fibh->ebh->b_data + |
109 | sizeof(struct fileIdentDesc) + | |
110 | fibh->soffset, | |
111 | crclen + sizeof(tag) - | |
112 | sizeof(struct fileIdentDesc), | |
113 | crc); | |
28de7948 CG |
114 | } else { |
115 | crc = udf_crc((uint8_t *)sfi->impUse, | |
4b11111a MS |
116 | -fibh->soffset - sizeof(struct fileIdentDesc), |
117 | crc); | |
1da177e4 LT |
118 | crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc); |
119 | } | |
120 | ||
121 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
122 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
3f2587bb | 123 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
1da177e4 | 124 | |
28de7948 | 125 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
4b11111a MS |
126 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
127 | sizeof(struct fileIdentDesc)); | |
28de7948 CG |
128 | } else { |
129 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
130 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 131 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
132 | } |
133 | ||
28de7948 | 134 | if (adinicb) { |
1da177e4 | 135 | mark_inode_dirty(inode); |
28de7948 | 136 | } else { |
1da177e4 LT |
137 | if (fibh->sbh != fibh->ebh) |
138 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
139 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
140 | } | |
141 | return 0; | |
142 | } | |
143 | ||
cb00ea35 CG |
144 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
145 | struct dentry *dentry, | |
146 | struct udf_fileident_bh *fibh, | |
147 | struct fileIdentDesc *cfi) | |
1da177e4 | 148 | { |
cb00ea35 | 149 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
150 | loff_t f_pos; |
151 | int block, flen; | |
152 | char fname[UDF_NAME_LEN]; | |
153 | char *nameptr; | |
154 | uint8_t lfi; | |
155 | uint16_t liu; | |
ec471dc4 | 156 | loff_t size; |
ff116fc8 JK |
157 | kernel_lb_addr eloc; |
158 | uint32_t elen; | |
60448b1d | 159 | sector_t offset; |
28de7948 | 160 | struct extent_position epos = {}; |
1da177e4 | 161 | |
ec471dc4 | 162 | size = (udf_ext0_offset(dir) + dir->i_size) >> 2; |
1da177e4 LT |
163 | f_pos = (udf_ext0_offset(dir) >> 2); |
164 | ||
4b11111a MS |
165 | fibh->soffset = fibh->eoffset = |
166 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
c0b34438 | 167 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 168 | fibh->sbh = fibh->ebh = NULL; |
4b11111a MS |
169 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
170 | &epos, &eloc, &elen, &offset) == | |
171 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 172 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 173 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
c0b34438 | 174 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 175 | epos.offset -= sizeof(short_ad); |
c0b34438 MS |
176 | else if (UDF_I(dir)->i_alloc_type == |
177 | ICBTAG_FLAG_AD_LONG) | |
ff116fc8 | 178 | epos.offset -= sizeof(long_ad); |
4b11111a | 179 | } else |
1da177e4 LT |
180 | offset = 0; |
181 | ||
4b11111a MS |
182 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
183 | if (!fibh->sbh) { | |
3bf25cb4 | 184 | brelse(epos.bh); |
1da177e4 LT |
185 | return NULL; |
186 | } | |
cb00ea35 | 187 | } else { |
3bf25cb4 | 188 | brelse(epos.bh); |
1da177e4 LT |
189 | return NULL; |
190 | } | |
191 | ||
cb00ea35 CG |
192 | while ((f_pos < size)) { |
193 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, | |
194 | &elen, &offset); | |
cb00ea35 | 195 | if (!fi) { |
1da177e4 | 196 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
197 | brelse(fibh->ebh); |
198 | brelse(fibh->sbh); | |
199 | brelse(epos.bh); | |
1da177e4 LT |
200 | return NULL; |
201 | } | |
202 | ||
203 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
204 | lfi = cfi->lengthFileIdent; | |
205 | ||
cb00ea35 | 206 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 207 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 208 | } else { |
1da177e4 LT |
209 | int poffset; /* Unpaded ending offset */ |
210 | ||
4b11111a MS |
211 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
212 | liu + lfi; | |
1da177e4 | 213 | |
4b11111a MS |
214 | if (poffset >= lfi) |
215 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
216 | poffset - lfi); | |
217 | else { | |
1da177e4 | 218 | nameptr = fname; |
4b11111a MS |
219 | memcpy(nameptr, fi->fileIdent + liu, |
220 | lfi - poffset); | |
221 | memcpy(nameptr + lfi - poffset, | |
222 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
223 | } |
224 | } | |
225 | ||
cb00ea35 CG |
226 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
227 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
228 | continue; |
229 | } | |
cb00ea35 CG |
230 | |
231 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
232 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
233 | continue; |
234 | } | |
235 | ||
236 | if (!lfi) | |
237 | continue; | |
238 | ||
4b11111a MS |
239 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
240 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
241 | dentry->d_name.name)) { | |
242 | brelse(epos.bh); | |
243 | return fi; | |
1da177e4 LT |
244 | } |
245 | } | |
28de7948 | 246 | |
1da177e4 | 247 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
248 | brelse(fibh->ebh); |
249 | brelse(fibh->sbh); | |
250 | brelse(epos.bh); | |
28de7948 | 251 | |
1da177e4 LT |
252 | return NULL; |
253 | } | |
254 | ||
255 | /* | |
256 | * udf_lookup | |
257 | * | |
258 | * PURPOSE | |
259 | * Look-up the inode for a given name. | |
260 | * | |
261 | * DESCRIPTION | |
262 | * Required - lookup_dentry() will return -ENOTDIR if this routine is not | |
263 | * available for a directory. The filesystem is useless if this routine is | |
264 | * not available for at least the filesystem's root directory. | |
265 | * | |
266 | * This routine is passed an incomplete dentry - it must be completed by | |
267 | * calling d_add(dentry, inode). If the name does not exist, then the | |
268 | * specified inode must be set to null. An error should only be returned | |
269 | * when the lookup fails for a reason other than the name not existing. | |
270 | * Note that the directory inode semaphore is held during the call. | |
271 | * | |
272 | * Refer to lookup_dentry() in fs/namei.c | |
273 | * lookup_dentry() -> lookup() -> real_lookup() -> . | |
274 | * | |
275 | * PRE-CONDITIONS | |
276 | * dir Pointer to inode of parent directory. | |
277 | * dentry Pointer to dentry to complete. | |
278 | * nd Pointer to lookup nameidata | |
279 | * | |
280 | * POST-CONDITIONS | |
281 | * <return> Zero on success. | |
282 | * | |
283 | * HISTORY | |
284 | * July 1, 1997 - Andrew E. Mileski | |
285 | * Written, tested, and released. | |
286 | */ | |
287 | ||
cb00ea35 CG |
288 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
289 | struct nameidata *nd) | |
1da177e4 LT |
290 | { |
291 | struct inode *inode = NULL; | |
db9a369e | 292 | struct fileIdentDesc cfi; |
1da177e4 LT |
293 | struct udf_fileident_bh fibh; |
294 | ||
cb00ea35 | 295 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
296 | return ERR_PTR(-ENAMETOOLONG); |
297 | ||
298 | lock_kernel(); | |
299 | #ifdef UDF_RECOVERY | |
300 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 301 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
28de7948 CG |
302 | kernel_lb_addr lb = { |
303 | .logicalBlockNum = 0, | |
4b11111a MS |
304 | .partitionReferenceNum = |
305 | simple_strtoul(dentry->d_name.name + 3, | |
306 | NULL, 0), | |
28de7948 | 307 | }; |
1da177e4 | 308 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 309 | if (!inode) { |
1da177e4 LT |
310 | unlock_kernel(); |
311 | return ERR_PTR(-EACCES); | |
312 | } | |
4b11111a | 313 | } else |
28de7948 | 314 | #endif /* UDF_RECOVERY */ |
1da177e4 | 315 | |
cb00ea35 | 316 | if (udf_find_entry(dir, dentry, &fibh, &cfi)) { |
1da177e4 | 317 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
318 | brelse(fibh.ebh); |
319 | brelse(fibh.sbh); | |
1da177e4 LT |
320 | |
321 | inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); | |
cb00ea35 | 322 | if (!inode) { |
1da177e4 LT |
323 | unlock_kernel(); |
324 | return ERR_PTR(-EACCES); | |
325 | } | |
326 | } | |
327 | unlock_kernel(); | |
328 | d_add(dentry, inode); | |
28de7948 | 329 | |
1da177e4 LT |
330 | return NULL; |
331 | } | |
332 | ||
cb00ea35 CG |
333 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
334 | struct dentry *dentry, | |
335 | struct udf_fileident_bh *fibh, | |
336 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 337 | { |
6c79e987 | 338 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 339 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
340 | char name[UDF_NAME_LEN], fname[UDF_NAME_LEN]; |
341 | int namelen; | |
342 | loff_t f_pos; | |
343 | int flen; | |
344 | char *nameptr; | |
345 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
346 | int nfidlen; | |
347 | uint8_t lfi; | |
348 | uint16_t liu; | |
349 | int block; | |
ff116fc8 JK |
350 | kernel_lb_addr eloc; |
351 | uint32_t elen; | |
60448b1d | 352 | sector_t offset; |
28de7948 | 353 | struct extent_position epos = {}; |
1da177e4 | 354 | |
cb00ea35 CG |
355 | if (dentry) { |
356 | if (!dentry->d_name.len) { | |
1da177e4 LT |
357 | *err = -EINVAL; |
358 | return NULL; | |
359 | } | |
4b11111a MS |
360 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
361 | dentry->d_name.len); | |
362 | if (!namelen) { | |
1da177e4 LT |
363 | *err = -ENAMETOOLONG; |
364 | return NULL; | |
365 | } | |
28de7948 | 366 | } else { |
1da177e4 | 367 | namelen = 0; |
28de7948 | 368 | } |
1da177e4 LT |
369 | |
370 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
371 | ||
372 | f_pos = (udf_ext0_offset(dir) >> 2); | |
373 | ||
4b11111a MS |
374 | fibh->soffset = fibh->eoffset = |
375 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
c0b34438 | 376 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 377 | fibh->sbh = fibh->ebh = NULL; |
4b11111a MS |
378 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
379 | &epos, &eloc, &elen, &offset) == | |
380 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 381 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 382 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
c0b34438 | 383 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 384 | epos.offset -= sizeof(short_ad); |
c0b34438 MS |
385 | else if (UDF_I(dir)->i_alloc_type == |
386 | ICBTAG_FLAG_AD_LONG) | |
ff116fc8 | 387 | epos.offset -= sizeof(long_ad); |
4b11111a | 388 | } else |
1da177e4 LT |
389 | offset = 0; |
390 | ||
4b11111a MS |
391 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
392 | if (!fibh->sbh) { | |
3bf25cb4 | 393 | brelse(epos.bh); |
1da177e4 LT |
394 | *err = -EIO; |
395 | return NULL; | |
396 | } | |
397 | ||
c0b34438 | 398 | block = UDF_I(dir)->i_location.logicalBlockNum; |
1da177e4 | 399 | |
cb00ea35 | 400 | } else { |
c0b34438 | 401 | block = udf_get_lb_pblock(dir->i_sb, UDF_I(dir)->i_location, 0); |
1da177e4 LT |
402 | fibh->sbh = fibh->ebh = NULL; |
403 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
404 | goto add; | |
405 | } | |
406 | ||
cb00ea35 CG |
407 | while ((f_pos < size)) { |
408 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, | |
409 | &elen, &offset); | |
1da177e4 | 410 | |
cb00ea35 | 411 | if (!fi) { |
1da177e4 | 412 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
413 | brelse(fibh->ebh); |
414 | brelse(fibh->sbh); | |
415 | brelse(epos.bh); | |
1da177e4 LT |
416 | *err = -EIO; |
417 | return NULL; | |
418 | } | |
419 | ||
420 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
421 | lfi = cfi->lengthFileIdent; | |
422 | ||
4b11111a | 423 | if (fibh->sbh == fibh->ebh) |
1da177e4 | 424 | nameptr = fi->fileIdent + liu; |
4b11111a | 425 | else { |
1da177e4 LT |
426 | int poffset; /* Unpaded ending offset */ |
427 | ||
4b11111a MS |
428 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
429 | liu + lfi; | |
1da177e4 | 430 | |
4b11111a MS |
431 | if (poffset >= lfi) |
432 | nameptr = (char *)(fibh->ebh->b_data + | |
433 | poffset - lfi); | |
434 | else { | |
1da177e4 | 435 | nameptr = fname; |
4b11111a MS |
436 | memcpy(nameptr, fi->fileIdent + liu, |
437 | lfi - poffset); | |
438 | memcpy(nameptr + lfi - poffset, | |
439 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
440 | } |
441 | } | |
442 | ||
cb00ea35 | 443 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
444 | if (((sizeof(struct fileIdentDesc) + |
445 | liu + lfi + 3) & ~3) == nfidlen) { | |
3bf25cb4 | 446 | brelse(epos.bh); |
1da177e4 LT |
447 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
448 | cfi->fileVersionNum = cpu_to_le16(1); | |
449 | cfi->fileCharacteristics = 0; | |
450 | cfi->lengthFileIdent = namelen; | |
451 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
452 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
453 | name)) | |
1da177e4 | 454 | return fi; |
4b11111a | 455 | else { |
1da177e4 LT |
456 | *err = -EIO; |
457 | return NULL; | |
458 | } | |
459 | } | |
460 | } | |
461 | ||
462 | if (!lfi || !dentry) | |
463 | continue; | |
464 | ||
4b11111a MS |
465 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
466 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
467 | dentry->d_name.name)) { | |
1da177e4 | 468 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
469 | brelse(fibh->ebh); |
470 | brelse(fibh->sbh); | |
471 | brelse(epos.bh); | |
1da177e4 LT |
472 | *err = -EEXIST; |
473 | return NULL; | |
474 | } | |
475 | } | |
476 | ||
28de7948 | 477 | add: |
1da177e4 LT |
478 | f_pos += nfidlen; |
479 | ||
c0b34438 | 480 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 481 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 482 | brelse(epos.bh); |
ff116fc8 | 483 | epos.bh = NULL; |
1da177e4 LT |
484 | fibh->soffset -= udf_ext0_offset(dir); |
485 | fibh->eoffset -= udf_ext0_offset(dir); | |
486 | f_pos -= (udf_ext0_offset(dir) >> 2); | |
487 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
488 | brelse(fibh->ebh); |
489 | brelse(fibh->sbh); | |
4b11111a MS |
490 | fibh->sbh = fibh->ebh = |
491 | udf_expand_dir_adinicb(dir, &block, err); | |
492 | if (!fibh->sbh) | |
1da177e4 | 493 | return NULL; |
c0b34438 | 494 | epos.block = UDF_I(dir)->i_location; |
1da177e4 | 495 | eloc.logicalBlockNum = block; |
4b11111a | 496 | eloc.partitionReferenceNum = |
c0b34438 | 497 | UDF_I(dir)->i_location.partitionReferenceNum; |
1da177e4 | 498 | elen = dir->i_sb->s_blocksize; |
ff116fc8 | 499 | epos.offset = udf_file_entry_alloc_offset(dir); |
c0b34438 | 500 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 501 | epos.offset += sizeof(short_ad); |
c0b34438 | 502 | else if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 503 | epos.offset += sizeof(long_ad); |
1da177e4 LT |
504 | } |
505 | ||
cb00ea35 | 506 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
507 | fibh->soffset = fibh->eoffset; |
508 | fibh->eoffset += nfidlen; | |
cb00ea35 | 509 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 510 | brelse(fibh->sbh); |
1da177e4 LT |
511 | fibh->sbh = fibh->ebh; |
512 | } | |
513 | ||
c0b34438 MS |
514 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
515 | block = UDF_I(dir)->i_location.logicalBlockNum; | |
4b11111a | 516 | fi = (struct fileIdentDesc *) |
c0b34438 MS |
517 | (UDF_I(dir)->i_ext.i_data + |
518 | fibh->soffset - | |
4b11111a | 519 | udf_ext0_offset(dir) + |
c0b34438 | 520 | UDF_I(dir)->i_lenEAttr); |
cb00ea35 | 521 | } else { |
4b11111a MS |
522 | block = eloc.logicalBlockNum + |
523 | ((elen - 1) >> | |
524 | dir->i_sb->s_blocksize_bits); | |
525 | fi = (struct fileIdentDesc *) | |
526 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 527 | } |
cb00ea35 | 528 | } else { |
1da177e4 LT |
529 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
530 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 531 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 532 | brelse(fibh->sbh); |
1da177e4 LT |
533 | fibh->sbh = fibh->ebh; |
534 | } | |
535 | ||
536 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 537 | dir->i_sb->s_blocksize_bits); |
4b11111a MS |
538 | fibh->ebh = udf_bread(dir, |
539 | f_pos >> (dir->i_sb->s_blocksize_bits - 2), | |
540 | 1, err); | |
28de7948 | 541 | if (!fibh->ebh) { |
3bf25cb4 JK |
542 | brelse(epos.bh); |
543 | brelse(fibh->sbh); | |
1da177e4 LT |
544 | return NULL; |
545 | } | |
546 | ||
28de7948 | 547 | if (!fibh->soffset) { |
ff116fc8 | 548 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 549 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 550 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 | 551 | dir->i_sb->s_blocksize_bits); |
4b11111a | 552 | } else |
cb00ea35 | 553 | block++; |
1da177e4 | 554 | |
3bf25cb4 | 555 | brelse(fibh->sbh); |
1da177e4 LT |
556 | fibh->sbh = fibh->ebh; |
557 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 558 | } else { |
1da177e4 | 559 | fi = (struct fileIdentDesc *) |
4b11111a MS |
560 | (fibh->sbh->b_data + sb->s_blocksize + |
561 | fibh->soffset); | |
1da177e4 LT |
562 | } |
563 | } | |
564 | ||
565 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 566 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a MS |
567 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
568 | sizeof(tag)); | |
1da177e4 | 569 | else |
4b11111a MS |
570 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
571 | sizeof(tag)); | |
1da177e4 LT |
572 | cfi->fileVersionNum = cpu_to_le16(1); |
573 | cfi->lengthFileIdent = namelen; | |
574 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 575 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
3bf25cb4 | 576 | brelse(epos.bh); |
1da177e4 | 577 | dir->i_size += nfidlen; |
c0b34438 MS |
578 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
579 | UDF_I(dir)->i_lenAlloc += nfidlen; | |
1da177e4 LT |
580 | mark_inode_dirty(dir); |
581 | return fi; | |
cb00ea35 | 582 | } else { |
3bf25cb4 | 583 | brelse(epos.bh); |
1da177e4 | 584 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
585 | brelse(fibh->ebh); |
586 | brelse(fibh->sbh); | |
1da177e4 LT |
587 | *err = -EIO; |
588 | return NULL; | |
589 | } | |
590 | } | |
591 | ||
592 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
593 | struct udf_fileident_bh *fibh, |
594 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
595 | { |
596 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 597 | |
1da177e4 LT |
598 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
599 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 600 | |
1da177e4 LT |
601 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
602 | } | |
603 | ||
cb00ea35 CG |
604 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
605 | struct nameidata *nd) | |
1da177e4 LT |
606 | { |
607 | struct udf_fileident_bh fibh; | |
608 | struct inode *inode; | |
609 | struct fileIdentDesc cfi, *fi; | |
610 | int err; | |
611 | ||
612 | lock_kernel(); | |
613 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 614 | if (!inode) { |
1da177e4 LT |
615 | unlock_kernel(); |
616 | return err; | |
617 | } | |
618 | ||
c0b34438 | 619 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 LT |
620 | inode->i_data.a_ops = &udf_adinicb_aops; |
621 | else | |
622 | inode->i_data.a_ops = &udf_aops; | |
623 | inode->i_op = &udf_file_inode_operations; | |
624 | inode->i_fop = &udf_file_operations; | |
625 | inode->i_mode = mode; | |
626 | mark_inode_dirty(inode); | |
627 | ||
4b11111a MS |
628 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
629 | if (!fi) { | |
cb00ea35 | 630 | inode->i_nlink--; |
1da177e4 LT |
631 | mark_inode_dirty(inode); |
632 | iput(inode); | |
633 | unlock_kernel(); | |
634 | return err; | |
635 | } | |
636 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 637 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
28de7948 | 638 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
c0b34438 | 639 | cpu_to_le32(UDF_I(inode)->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 640 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 641 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 642 | mark_inode_dirty(dir); |
1da177e4 | 643 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
644 | brelse(fibh.ebh); |
645 | brelse(fibh.sbh); | |
1da177e4 LT |
646 | unlock_kernel(); |
647 | d_instantiate(dentry, inode); | |
28de7948 | 648 | |
1da177e4 LT |
649 | return 0; |
650 | } | |
651 | ||
cb00ea35 CG |
652 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
653 | dev_t rdev) | |
1da177e4 | 654 | { |
cb00ea35 | 655 | struct inode *inode; |
1da177e4 LT |
656 | struct udf_fileident_bh fibh; |
657 | struct fileIdentDesc cfi, *fi; | |
658 | int err; | |
659 | ||
660 | if (!old_valid_dev(rdev)) | |
661 | return -EINVAL; | |
662 | ||
663 | lock_kernel(); | |
664 | err = -EIO; | |
665 | inode = udf_new_inode(dir, mode, &err); | |
666 | if (!inode) | |
667 | goto out; | |
668 | ||
669 | inode->i_uid = current->fsuid; | |
670 | init_special_inode(inode, mode, rdev); | |
4b11111a MS |
671 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
672 | if (!fi) { | |
cb00ea35 | 673 | inode->i_nlink--; |
1da177e4 LT |
674 | mark_inode_dirty(inode); |
675 | iput(inode); | |
676 | unlock_kernel(); | |
677 | return err; | |
678 | } | |
679 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 680 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
28de7948 | 681 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
c0b34438 | 682 | cpu_to_le32(UDF_I(inode)->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 683 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 684 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 685 | mark_inode_dirty(dir); |
1da177e4 LT |
686 | mark_inode_dirty(inode); |
687 | ||
688 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
689 | brelse(fibh.ebh); |
690 | brelse(fibh.sbh); | |
1da177e4 LT |
691 | d_instantiate(dentry, inode); |
692 | err = 0; | |
28de7948 CG |
693 | |
694 | out: | |
1da177e4 LT |
695 | unlock_kernel(); |
696 | return err; | |
697 | } | |
698 | ||
cb00ea35 | 699 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 700 | { |
cb00ea35 | 701 | struct inode *inode; |
1da177e4 LT |
702 | struct udf_fileident_bh fibh; |
703 | struct fileIdentDesc cfi, *fi; | |
704 | int err; | |
705 | ||
706 | lock_kernel(); | |
707 | err = -EMLINK; | |
cb00ea35 | 708 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
709 | goto out; |
710 | ||
711 | err = -EIO; | |
712 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
713 | if (!inode) | |
714 | goto out; | |
715 | ||
716 | inode->i_op = &udf_dir_inode_operations; | |
717 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
718 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
719 | if (!fi) { | |
1da177e4 LT |
720 | inode->i_nlink--; |
721 | mark_inode_dirty(inode); | |
722 | iput(inode); | |
723 | goto out; | |
724 | } | |
725 | inode->i_nlink = 2; | |
726 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 727 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(dir)->i_location); |
28de7948 | 728 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
c0b34438 | 729 | cpu_to_le32(UDF_I(dir)->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
730 | cfi.fileCharacteristics = |
731 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 732 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 733 | brelse(fibh.sbh); |
1da177e4 LT |
734 | inode->i_mode = S_IFDIR | mode; |
735 | if (dir->i_mode & S_ISGID) | |
736 | inode->i_mode |= S_ISGID; | |
737 | mark_inode_dirty(inode); | |
738 | ||
4b11111a MS |
739 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
740 | if (!fi) { | |
1da177e4 LT |
741 | inode->i_nlink = 0; |
742 | mark_inode_dirty(inode); | |
743 | iput(inode); | |
744 | goto out; | |
745 | } | |
746 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 747 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
28de7948 | 748 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
c0b34438 | 749 | cpu_to_le32(UDF_I(inode)->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
750 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
751 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 752 | inc_nlink(dir); |
1da177e4 LT |
753 | mark_inode_dirty(dir); |
754 | d_instantiate(dentry, inode); | |
755 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
756 | brelse(fibh.ebh); |
757 | brelse(fibh.sbh); | |
1da177e4 | 758 | err = 0; |
28de7948 CG |
759 | |
760 | out: | |
1da177e4 LT |
761 | unlock_kernel(); |
762 | return err; | |
763 | } | |
764 | ||
765 | static int empty_dir(struct inode *dir) | |
766 | { | |
767 | struct fileIdentDesc *fi, cfi; | |
768 | struct udf_fileident_bh fibh; | |
769 | loff_t f_pos; | |
770 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
771 | int block; | |
ff116fc8 JK |
772 | kernel_lb_addr eloc; |
773 | uint32_t elen; | |
60448b1d | 774 | sector_t offset; |
28de7948 | 775 | struct extent_position epos = {}; |
1da177e4 LT |
776 | |
777 | f_pos = (udf_ext0_offset(dir) >> 2); | |
778 | ||
4b11111a MS |
779 | fibh.soffset = fibh.eoffset = |
780 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
1da177e4 | 781 | |
c0b34438 | 782 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 783 | fibh.sbh = fibh.ebh = NULL; |
4b11111a MS |
784 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
785 | &epos, &eloc, &elen, &offset) == | |
786 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 787 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 788 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
c0b34438 | 789 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 790 | epos.offset -= sizeof(short_ad); |
c0b34438 MS |
791 | else if (UDF_I(dir)->i_alloc_type == |
792 | ICBTAG_FLAG_AD_LONG) | |
ff116fc8 | 793 | epos.offset -= sizeof(long_ad); |
4b11111a | 794 | } else |
1da177e4 LT |
795 | offset = 0; |
796 | ||
4b11111a MS |
797 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
798 | if (!fibh.sbh) { | |
3bf25cb4 | 799 | brelse(epos.bh); |
1da177e4 LT |
800 | return 0; |
801 | } | |
cb00ea35 | 802 | } else { |
3bf25cb4 | 803 | brelse(epos.bh); |
1da177e4 LT |
804 | return 0; |
805 | } | |
806 | ||
cb00ea35 CG |
807 | while ((f_pos < size)) { |
808 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, | |
809 | &elen, &offset); | |
cb00ea35 | 810 | if (!fi) { |
1da177e4 | 811 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
812 | brelse(fibh.ebh); |
813 | brelse(fibh.sbh); | |
814 | brelse(epos.bh); | |
1da177e4 LT |
815 | return 0; |
816 | } | |
817 | ||
28de7948 CG |
818 | if (cfi.lengthFileIdent && |
819 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 820 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
821 | brelse(fibh.ebh); |
822 | brelse(fibh.sbh); | |
823 | brelse(epos.bh); | |
1da177e4 LT |
824 | return 0; |
825 | } | |
826 | } | |
28de7948 | 827 | |
1da177e4 | 828 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
829 | brelse(fibh.ebh); |
830 | brelse(fibh.sbh); | |
831 | brelse(epos.bh); | |
28de7948 | 832 | |
1da177e4 LT |
833 | return 1; |
834 | } | |
835 | ||
cb00ea35 | 836 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
837 | { |
838 | int retval; | |
cb00ea35 | 839 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
840 | struct udf_fileident_bh fibh; |
841 | struct fileIdentDesc *fi, cfi; | |
842 | kernel_lb_addr tloc; | |
843 | ||
844 | retval = -ENOENT; | |
845 | lock_kernel(); | |
846 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
847 | if (!fi) | |
848 | goto out; | |
849 | ||
850 | retval = -EIO; | |
851 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
852 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
853 | goto end_rmdir; | |
854 | retval = -ENOTEMPTY; | |
855 | if (!empty_dir(inode)) | |
856 | goto end_rmdir; | |
857 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
858 | if (retval) | |
859 | goto end_rmdir; | |
860 | if (inode->i_nlink != 2) | |
861 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
862 | "empty directory has nlink != 2 (%d)", |
863 | inode->i_nlink); | |
ce71ec36 | 864 | clear_nlink(inode); |
1da177e4 | 865 | inode->i_size = 0; |
c007c06e | 866 | inode_dec_link_count(dir); |
4b11111a MS |
867 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
868 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
869 | mark_inode_dirty(dir); |
870 | ||
28de7948 | 871 | end_rmdir: |
1da177e4 | 872 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
873 | brelse(fibh.ebh); |
874 | brelse(fibh.sbh); | |
28de7948 CG |
875 | |
876 | out: | |
1da177e4 LT |
877 | unlock_kernel(); |
878 | return retval; | |
879 | } | |
880 | ||
cb00ea35 | 881 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
882 | { |
883 | int retval; | |
cb00ea35 | 884 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
885 | struct udf_fileident_bh fibh; |
886 | struct fileIdentDesc *fi; | |
887 | struct fileIdentDesc cfi; | |
888 | kernel_lb_addr tloc; | |
889 | ||
890 | retval = -ENOENT; | |
891 | lock_kernel(); | |
892 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
893 | if (!fi) | |
894 | goto out; | |
895 | ||
896 | retval = -EIO; | |
897 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
898 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
899 | goto end_unlink; | |
900 | ||
cb00ea35 | 901 | if (!inode->i_nlink) { |
1da177e4 | 902 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 903 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
904 | inode->i_nlink = 1; |
905 | } | |
906 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
907 | if (retval) | |
908 | goto end_unlink; | |
909 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
910 | mark_inode_dirty(dir); | |
9a53c3a7 | 911 | inode_dec_link_count(inode); |
1da177e4 LT |
912 | inode->i_ctime = dir->i_ctime; |
913 | retval = 0; | |
914 | ||
28de7948 | 915 | end_unlink: |
1da177e4 | 916 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
917 | brelse(fibh.ebh); |
918 | brelse(fibh.sbh); | |
28de7948 CG |
919 | |
920 | out: | |
1da177e4 LT |
921 | unlock_kernel(); |
922 | return retval; | |
923 | } | |
924 | ||
cb00ea35 CG |
925 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
926 | const char *symname) | |
1da177e4 | 927 | { |
cb00ea35 | 928 | struct inode *inode; |
1da177e4 LT |
929 | struct pathComponent *pc; |
930 | char *compstart; | |
931 | struct udf_fileident_bh fibh; | |
28de7948 | 932 | struct extent_position epos = {}; |
1da177e4 LT |
933 | int eoffset, elen = 0; |
934 | struct fileIdentDesc *fi; | |
935 | struct fileIdentDesc cfi; | |
936 | char *ea; | |
937 | int err; | |
938 | int block; | |
939 | char name[UDF_NAME_LEN]; | |
940 | int namelen; | |
6c79e987 | 941 | struct buffer_head *bh; |
1da177e4 LT |
942 | |
943 | lock_kernel(); | |
4b11111a MS |
944 | inode = udf_new_inode(dir, S_IFLNK, &err); |
945 | if (!inode) | |
1da177e4 LT |
946 | goto out; |
947 | ||
948 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
949 | inode->i_data.a_ops = &udf_symlink_aops; | |
950 | inode->i_op = &page_symlink_inode_operations; | |
951 | ||
c0b34438 | 952 | if (UDF_I(inode)->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 JK |
953 | kernel_lb_addr eloc; |
954 | uint32_t elen; | |
1da177e4 LT |
955 | |
956 | block = udf_new_block(inode->i_sb, inode, | |
c0b34438 MS |
957 | UDF_I(inode)->i_location.partitionReferenceNum, |
958 | UDF_I(inode)->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
959 | if (!block) |
960 | goto out_no_entry; | |
c0b34438 | 961 | epos.block = UDF_I(inode)->i_location; |
ff116fc8 JK |
962 | epos.offset = udf_file_entry_alloc_offset(inode); |
963 | epos.bh = NULL; | |
1da177e4 | 964 | eloc.logicalBlockNum = block; |
4b11111a | 965 | eloc.partitionReferenceNum = |
c0b34438 | 966 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 967 | elen = inode->i_sb->s_blocksize; |
c0b34438 | 968 | UDF_I(inode)->i_lenExtents = elen; |
ff116fc8 | 969 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 970 | brelse(epos.bh); |
1da177e4 LT |
971 | |
972 | block = udf_get_pblock(inode->i_sb, block, | |
c0b34438 | 973 | UDF_I(inode)->i_location.partitionReferenceNum, |
4b11111a | 974 | 0); |
ff116fc8 JK |
975 | epos.bh = udf_tread(inode->i_sb, block); |
976 | lock_buffer(epos.bh); | |
977 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
978 | set_buffer_uptodate(epos.bh); | |
979 | unlock_buffer(epos.bh); | |
980 | mark_buffer_dirty_inode(epos.bh, inode); | |
981 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
28de7948 | 982 | } else { |
c0b34438 | 983 | ea = UDF_I(inode)->i_ext.i_data + UDF_I(inode)->i_lenEAttr; |
28de7948 | 984 | } |
1da177e4 LT |
985 | |
986 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
987 | pc = (struct pathComponent *)ea; | |
988 | ||
cb00ea35 CG |
989 | if (*symname == '/') { |
990 | do { | |
1da177e4 LT |
991 | symname++; |
992 | } while (*symname == '/'); | |
993 | ||
994 | pc->componentType = 1; | |
995 | pc->lengthComponentIdent = 0; | |
996 | pc->componentFileVersionNum = 0; | |
997 | pc += sizeof(struct pathComponent); | |
998 | elen += sizeof(struct pathComponent); | |
999 | } | |
1000 | ||
1001 | err = -ENAMETOOLONG; | |
1002 | ||
cb00ea35 | 1003 | while (*symname) { |
1da177e4 LT |
1004 | if (elen + sizeof(struct pathComponent) > eoffset) |
1005 | goto out_no_entry; | |
1006 | ||
1007 | pc = (struct pathComponent *)(ea + elen); | |
1008 | ||
1009 | compstart = (char *)symname; | |
1010 | ||
cb00ea35 | 1011 | do { |
1da177e4 LT |
1012 | symname++; |
1013 | } while (*symname && *symname != '/'); | |
1014 | ||
1015 | pc->componentType = 5; | |
1016 | pc->lengthComponentIdent = 0; | |
1017 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
1018 | if (compstart[0] == '.') { |
1019 | if ((symname - compstart) == 1) | |
1da177e4 | 1020 | pc->componentType = 4; |
4b11111a MS |
1021 | else if ((symname - compstart) == 2 && |
1022 | compstart[1] == '.') | |
1da177e4 LT |
1023 | pc->componentType = 3; |
1024 | } | |
1025 | ||
cb00ea35 | 1026 | if (pc->componentType == 5) { |
28de7948 CG |
1027 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
1028 | symname - compstart); | |
1029 | if (!namelen) | |
1da177e4 LT |
1030 | goto out_no_entry; |
1031 | ||
4b11111a MS |
1032 | if (elen + sizeof(struct pathComponent) + namelen > |
1033 | eoffset) | |
1da177e4 LT |
1034 | goto out_no_entry; |
1035 | else | |
1036 | pc->lengthComponentIdent = namelen; | |
1037 | ||
1038 | memcpy(pc->componentIdent, name, namelen); | |
1039 | } | |
1040 | ||
1041 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1042 | ||
cb00ea35 CG |
1043 | if (*symname) { |
1044 | do { | |
1da177e4 LT |
1045 | symname++; |
1046 | } while (*symname == '/'); | |
1047 | } | |
1048 | } | |
1049 | ||
3bf25cb4 | 1050 | brelse(epos.bh); |
1da177e4 | 1051 | inode->i_size = elen; |
c0b34438 MS |
1052 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1053 | UDF_I(inode)->i_lenAlloc = inode->i_size; | |
1da177e4 LT |
1054 | mark_inode_dirty(inode); |
1055 | ||
4b11111a MS |
1056 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1057 | if (!fi) | |
1da177e4 LT |
1058 | goto out_no_entry; |
1059 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1060 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1061 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1062 | if (bh) { | |
4b11111a MS |
1063 | struct logicalVolIntegrityDesc *lvid = |
1064 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1065 | struct logicalVolHeaderDesc *lvhd; |
1066 | uint64_t uniqueID; | |
4b11111a MS |
1067 | lvhd = (struct logicalVolHeaderDesc *) |
1068 | lvid->logicalVolContentsUse; | |
1da177e4 | 1069 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1070 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1071 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1072 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1073 | uniqueID += 16; | |
1074 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1075 | mark_buffer_dirty(bh); |
1da177e4 LT |
1076 | } |
1077 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1078 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1079 | mark_inode_dirty(dir); |
1da177e4 | 1080 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1081 | brelse(fibh.ebh); |
1082 | brelse(fibh.sbh); | |
1da177e4 LT |
1083 | d_instantiate(dentry, inode); |
1084 | err = 0; | |
1085 | ||
28de7948 | 1086 | out: |
1da177e4 LT |
1087 | unlock_kernel(); |
1088 | return err; | |
1089 | ||
28de7948 | 1090 | out_no_entry: |
9a53c3a7 | 1091 | inode_dec_link_count(inode); |
1da177e4 LT |
1092 | iput(inode); |
1093 | goto out; | |
1094 | } | |
1095 | ||
cb00ea35 CG |
1096 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1097 | struct dentry *dentry) | |
1da177e4 LT |
1098 | { |
1099 | struct inode *inode = old_dentry->d_inode; | |
1100 | struct udf_fileident_bh fibh; | |
1101 | struct fileIdentDesc cfi, *fi; | |
1102 | int err; | |
6c79e987 | 1103 | struct buffer_head *bh; |
1da177e4 LT |
1104 | |
1105 | lock_kernel(); | |
cb00ea35 | 1106 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1107 | unlock_kernel(); |
1108 | return -EMLINK; | |
1109 | } | |
1110 | ||
4b11111a MS |
1111 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1112 | if (!fi) { | |
1da177e4 LT |
1113 | unlock_kernel(); |
1114 | return err; | |
1115 | } | |
1116 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1117 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1118 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1119 | if (bh) { | |
4b11111a MS |
1120 | struct logicalVolIntegrityDesc *lvid = |
1121 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1122 | struct logicalVolHeaderDesc *lvhd; |
1123 | uint64_t uniqueID; | |
4b11111a MS |
1124 | lvhd = (struct logicalVolHeaderDesc *) |
1125 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1126 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1127 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1128 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1129 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1130 | uniqueID += 16; | |
1131 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1132 | mark_buffer_dirty(bh); |
1da177e4 LT |
1133 | } |
1134 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1135 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1136 | mark_inode_dirty(dir); |
28de7948 | 1137 | |
1da177e4 | 1138 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1139 | brelse(fibh.ebh); |
1140 | brelse(fibh.sbh); | |
d8c76e6f | 1141 | inc_nlink(inode); |
1da177e4 LT |
1142 | inode->i_ctime = current_fs_time(inode->i_sb); |
1143 | mark_inode_dirty(inode); | |
1144 | atomic_inc(&inode->i_count); | |
1145 | d_instantiate(dentry, inode); | |
1146 | unlock_kernel(); | |
28de7948 | 1147 | |
1da177e4 LT |
1148 | return 0; |
1149 | } | |
1150 | ||
1151 | /* Anybody can rename anything with this: the permission checks are left to the | |
1152 | * higher-level routines. | |
1153 | */ | |
cb00ea35 CG |
1154 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1155 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1156 | { |
cb00ea35 CG |
1157 | struct inode *old_inode = old_dentry->d_inode; |
1158 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1159 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1160 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1161 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1162 | struct buffer_head *dir_bh = NULL; |
1163 | int retval = -ENOENT; | |
1164 | kernel_lb_addr tloc; | |
1165 | ||
1166 | lock_kernel(); | |
4b11111a MS |
1167 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); |
1168 | if (ofi) { | |
1da177e4 | 1169 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1170 | brelse(ofibh.ebh); |
1171 | brelse(ofibh.sbh); | |
1da177e4 LT |
1172 | } |
1173 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1174 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1175 | != old_inode->i_ino) |
1da177e4 LT |
1176 | goto end_rename; |
1177 | ||
1178 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1179 | if (nfi) { |
1180 | if (!new_inode) { | |
1da177e4 | 1181 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1182 | brelse(nfibh.ebh); |
1183 | brelse(nfibh.sbh); | |
1da177e4 LT |
1184 | nfi = NULL; |
1185 | } | |
1186 | } | |
cb00ea35 | 1187 | if (S_ISDIR(old_inode->i_mode)) { |
1da177e4 LT |
1188 | uint32_t offset = udf_ext0_offset(old_inode); |
1189 | ||
cb00ea35 | 1190 | if (new_inode) { |
1da177e4 LT |
1191 | retval = -ENOTEMPTY; |
1192 | if (!empty_dir(new_inode)) | |
1193 | goto end_rename; | |
1194 | } | |
1195 | retval = -EIO; | |
c0b34438 | 1196 | if (UDF_I(old_inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1197 | dir_fi = udf_get_fileident( |
c0b34438 MS |
1198 | UDF_I(old_inode)->i_ext.i_data - |
1199 | (UDF_I(old_inode)->i_efe ? | |
4b11111a MS |
1200 | sizeof(struct extendedFileEntry) : |
1201 | sizeof(struct fileEntry)), | |
1202 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1203 | } else { |
1da177e4 LT |
1204 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1205 | if (!dir_bh) | |
1206 | goto end_rename; | |
4b11111a MS |
1207 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1208 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1209 | } |
1210 | if (!dir_fi) | |
1211 | goto end_rename; | |
1212 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
4b11111a MS |
1213 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != |
1214 | old_dir->i_ino) | |
1da177e4 LT |
1215 | goto end_rename; |
1216 | ||
1217 | retval = -EMLINK; | |
4b11111a MS |
1218 | if (!new_inode && |
1219 | new_dir->i_nlink >= | |
1220 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1221 | goto end_rename; |
1222 | } | |
cb00ea35 | 1223 | if (!nfi) { |
4b11111a MS |
1224 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1225 | &retval); | |
1da177e4 LT |
1226 | if (!nfi) |
1227 | goto end_rename; | |
1228 | } | |
1229 | ||
1230 | /* | |
1231 | * Like most other Unix systems, set the ctime for inodes on a | |
1232 | * rename. | |
1233 | */ | |
1234 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1235 | mark_inode_dirty(old_inode); | |
1236 | ||
1237 | /* | |
1238 | * ok, that's it | |
1239 | */ | |
1240 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1241 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1242 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1243 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1244 | ||
1245 | /* The old fid may have moved - find it again */ | |
1246 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1247 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1248 | ||
cb00ea35 | 1249 | if (new_inode) { |
1da177e4 | 1250 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1251 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1252 | } |
1253 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1254 | mark_inode_dirty(old_dir); | |
1255 | ||
cb00ea35 | 1256 | if (dir_fi) { |
c0b34438 | 1257 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1258 | udf_update_tag((char *)dir_fi, |
1259 | (sizeof(struct fileIdentDesc) + | |
1260 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
c0b34438 | 1261 | if (UDF_I(old_inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1262 | mark_inode_dirty(old_inode); |
4b11111a | 1263 | else |
1da177e4 | 1264 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1265 | |
9a53c3a7 | 1266 | inode_dec_link_count(old_dir); |
4b11111a | 1267 | if (new_inode) |
9a53c3a7 | 1268 | inode_dec_link_count(new_inode); |
4b11111a | 1269 | else { |
d8c76e6f | 1270 | inc_nlink(new_dir); |
1da177e4 LT |
1271 | mark_inode_dirty(new_dir); |
1272 | } | |
1273 | } | |
1274 | ||
cb00ea35 | 1275 | if (ofi) { |
1da177e4 | 1276 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1277 | brelse(ofibh.ebh); |
1278 | brelse(ofibh.sbh); | |
1da177e4 LT |
1279 | } |
1280 | ||
1281 | retval = 0; | |
1282 | ||
28de7948 | 1283 | end_rename: |
3bf25cb4 | 1284 | brelse(dir_bh); |
cb00ea35 | 1285 | if (nfi) { |
1da177e4 | 1286 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1287 | brelse(nfibh.ebh); |
1288 | brelse(nfibh.sbh); | |
1da177e4 LT |
1289 | } |
1290 | unlock_kernel(); | |
28de7948 | 1291 | |
1da177e4 LT |
1292 | return retval; |
1293 | } | |
1294 | ||
c5ef1c42 | 1295 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1296 | .lookup = udf_lookup, |
1297 | .create = udf_create, | |
1298 | .link = udf_link, | |
1299 | .unlink = udf_unlink, | |
1300 | .symlink = udf_symlink, | |
1301 | .mkdir = udf_mkdir, | |
1302 | .rmdir = udf_rmdir, | |
1303 | .mknod = udf_mknod, | |
1304 | .rename = udf_rename, | |
1da177e4 | 1305 | }; |