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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 | 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 = {}; |
48d6d8ff | 161 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 162 | |
ec471dc4 | 163 | size = (udf_ext0_offset(dir) + dir->i_size) >> 2; |
1da177e4 LT |
164 | f_pos = (udf_ext0_offset(dir) >> 2); |
165 | ||
4b11111a MS |
166 | fibh->soffset = fibh->eoffset = |
167 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
48d6d8ff | 168 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 169 | fibh->sbh = fibh->ebh = NULL; |
4b11111a MS |
170 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
171 | &epos, &eloc, &elen, &offset) == | |
172 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 173 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 174 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 175 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 176 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 177 | else if (dinfo->i_alloc_type == 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 = {}; |
48d6d8ff | 354 | struct udf_inode_info *dinfo; |
1da177e4 | 355 | |
cb00ea35 CG |
356 | if (dentry) { |
357 | if (!dentry->d_name.len) { | |
1da177e4 LT |
358 | *err = -EINVAL; |
359 | return NULL; | |
360 | } | |
4b11111a MS |
361 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
362 | dentry->d_name.len); | |
363 | if (!namelen) { | |
1da177e4 LT |
364 | *err = -ENAMETOOLONG; |
365 | return NULL; | |
366 | } | |
28de7948 | 367 | } else { |
1da177e4 | 368 | namelen = 0; |
28de7948 | 369 | } |
1da177e4 LT |
370 | |
371 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
372 | ||
373 | f_pos = (udf_ext0_offset(dir) >> 2); | |
374 | ||
4b11111a MS |
375 | fibh->soffset = fibh->eoffset = |
376 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
48d6d8ff MS |
377 | dinfo = UDF_I(dir); |
378 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 | 379 | fibh->sbh = fibh->ebh = NULL; |
4b11111a MS |
380 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
381 | &epos, &eloc, &elen, &offset) == | |
382 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 383 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 384 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 385 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 386 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 387 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 388 | epos.offset -= sizeof(long_ad); |
4b11111a | 389 | } else |
1da177e4 LT |
390 | offset = 0; |
391 | ||
4b11111a MS |
392 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
393 | if (!fibh->sbh) { | |
3bf25cb4 | 394 | brelse(epos.bh); |
1da177e4 LT |
395 | *err = -EIO; |
396 | return NULL; | |
397 | } | |
398 | ||
48d6d8ff | 399 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 | 400 | |
cb00ea35 | 401 | } else { |
48d6d8ff | 402 | block = udf_get_lb_pblock(dir->i_sb, dinfo->i_location, 0); |
1da177e4 LT |
403 | fibh->sbh = fibh->ebh = NULL; |
404 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
405 | goto add; | |
406 | } | |
407 | ||
cb00ea35 CG |
408 | while ((f_pos < size)) { |
409 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, | |
410 | &elen, &offset); | |
1da177e4 | 411 | |
cb00ea35 | 412 | if (!fi) { |
1da177e4 | 413 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
414 | brelse(fibh->ebh); |
415 | brelse(fibh->sbh); | |
416 | brelse(epos.bh); | |
1da177e4 LT |
417 | *err = -EIO; |
418 | return NULL; | |
419 | } | |
420 | ||
421 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
422 | lfi = cfi->lengthFileIdent; | |
423 | ||
4b11111a | 424 | if (fibh->sbh == fibh->ebh) |
1da177e4 | 425 | nameptr = fi->fileIdent + liu; |
4b11111a | 426 | else { |
1da177e4 LT |
427 | int poffset; /* Unpaded ending offset */ |
428 | ||
4b11111a MS |
429 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
430 | liu + lfi; | |
1da177e4 | 431 | |
4b11111a MS |
432 | if (poffset >= lfi) |
433 | nameptr = (char *)(fibh->ebh->b_data + | |
434 | poffset - lfi); | |
435 | else { | |
1da177e4 | 436 | nameptr = fname; |
4b11111a MS |
437 | memcpy(nameptr, fi->fileIdent + liu, |
438 | lfi - poffset); | |
439 | memcpy(nameptr + lfi - poffset, | |
440 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
441 | } |
442 | } | |
443 | ||
cb00ea35 | 444 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
445 | if (((sizeof(struct fileIdentDesc) + |
446 | liu + lfi + 3) & ~3) == nfidlen) { | |
3bf25cb4 | 447 | brelse(epos.bh); |
1da177e4 LT |
448 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
449 | cfi->fileVersionNum = cpu_to_le16(1); | |
450 | cfi->fileCharacteristics = 0; | |
451 | cfi->lengthFileIdent = namelen; | |
452 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
453 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
454 | name)) | |
1da177e4 | 455 | return fi; |
4b11111a | 456 | else { |
1da177e4 LT |
457 | *err = -EIO; |
458 | return NULL; | |
459 | } | |
460 | } | |
461 | } | |
462 | ||
463 | if (!lfi || !dentry) | |
464 | continue; | |
465 | ||
4b11111a MS |
466 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
467 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
468 | dentry->d_name.name)) { | |
1da177e4 | 469 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
470 | brelse(fibh->ebh); |
471 | brelse(fibh->sbh); | |
472 | brelse(epos.bh); | |
1da177e4 LT |
473 | *err = -EEXIST; |
474 | return NULL; | |
475 | } | |
476 | } | |
477 | ||
28de7948 | 478 | add: |
1da177e4 LT |
479 | f_pos += nfidlen; |
480 | ||
48d6d8ff | 481 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 482 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 483 | brelse(epos.bh); |
ff116fc8 | 484 | epos.bh = NULL; |
1da177e4 LT |
485 | fibh->soffset -= udf_ext0_offset(dir); |
486 | fibh->eoffset -= udf_ext0_offset(dir); | |
487 | f_pos -= (udf_ext0_offset(dir) >> 2); | |
488 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
489 | brelse(fibh->ebh); |
490 | brelse(fibh->sbh); | |
4b11111a MS |
491 | fibh->sbh = fibh->ebh = |
492 | udf_expand_dir_adinicb(dir, &block, err); | |
493 | if (!fibh->sbh) | |
1da177e4 | 494 | return NULL; |
48d6d8ff | 495 | epos.block = dinfo->i_location; |
1da177e4 | 496 | eloc.logicalBlockNum = block; |
4b11111a | 497 | eloc.partitionReferenceNum = |
48d6d8ff | 498 | dinfo->i_location.partitionReferenceNum; |
1da177e4 | 499 | elen = dir->i_sb->s_blocksize; |
ff116fc8 | 500 | epos.offset = udf_file_entry_alloc_offset(dir); |
48d6d8ff | 501 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 502 | epos.offset += sizeof(short_ad); |
48d6d8ff | 503 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 504 | epos.offset += sizeof(long_ad); |
1da177e4 LT |
505 | } |
506 | ||
cb00ea35 | 507 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
508 | fibh->soffset = fibh->eoffset; |
509 | fibh->eoffset += nfidlen; | |
cb00ea35 | 510 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 511 | brelse(fibh->sbh); |
1da177e4 LT |
512 | fibh->sbh = fibh->ebh; |
513 | } | |
514 | ||
48d6d8ff MS |
515 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
516 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 517 | fi = (struct fileIdentDesc *) |
48d6d8ff | 518 | (dinfo->i_ext.i_data + |
c0b34438 | 519 | fibh->soffset - |
4b11111a | 520 | udf_ext0_offset(dir) + |
48d6d8ff | 521 | dinfo->i_lenEAttr); |
cb00ea35 | 522 | } else { |
4b11111a MS |
523 | block = eloc.logicalBlockNum + |
524 | ((elen - 1) >> | |
525 | dir->i_sb->s_blocksize_bits); | |
526 | fi = (struct fileIdentDesc *) | |
527 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 528 | } |
cb00ea35 | 529 | } else { |
1da177e4 LT |
530 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
531 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 532 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 533 | brelse(fibh->sbh); |
1da177e4 LT |
534 | fibh->sbh = fibh->ebh; |
535 | } | |
536 | ||
537 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 538 | dir->i_sb->s_blocksize_bits); |
4b11111a MS |
539 | fibh->ebh = udf_bread(dir, |
540 | f_pos >> (dir->i_sb->s_blocksize_bits - 2), | |
541 | 1, err); | |
28de7948 | 542 | if (!fibh->ebh) { |
3bf25cb4 JK |
543 | brelse(epos.bh); |
544 | brelse(fibh->sbh); | |
1da177e4 LT |
545 | return NULL; |
546 | } | |
547 | ||
28de7948 | 548 | if (!fibh->soffset) { |
ff116fc8 | 549 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 550 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 551 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 | 552 | dir->i_sb->s_blocksize_bits); |
4b11111a | 553 | } else |
cb00ea35 | 554 | block++; |
1da177e4 | 555 | |
3bf25cb4 | 556 | brelse(fibh->sbh); |
1da177e4 LT |
557 | fibh->sbh = fibh->ebh; |
558 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 559 | } else { |
1da177e4 | 560 | fi = (struct fileIdentDesc *) |
4b11111a MS |
561 | (fibh->sbh->b_data + sb->s_blocksize + |
562 | fibh->soffset); | |
1da177e4 LT |
563 | } |
564 | } | |
565 | ||
566 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 567 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a MS |
568 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
569 | sizeof(tag)); | |
1da177e4 | 570 | else |
4b11111a MS |
571 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
572 | sizeof(tag)); | |
1da177e4 LT |
573 | cfi->fileVersionNum = cpu_to_le16(1); |
574 | cfi->lengthFileIdent = namelen; | |
575 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 576 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
3bf25cb4 | 577 | brelse(epos.bh); |
1da177e4 | 578 | dir->i_size += nfidlen; |
48d6d8ff MS |
579 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
580 | dinfo->i_lenAlloc += nfidlen; | |
1da177e4 LT |
581 | mark_inode_dirty(dir); |
582 | return fi; | |
cb00ea35 | 583 | } else { |
3bf25cb4 | 584 | brelse(epos.bh); |
1da177e4 | 585 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
586 | brelse(fibh->ebh); |
587 | brelse(fibh->sbh); | |
1da177e4 LT |
588 | *err = -EIO; |
589 | return NULL; | |
590 | } | |
591 | } | |
592 | ||
593 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
594 | struct udf_fileident_bh *fibh, |
595 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
596 | { |
597 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 598 | |
1da177e4 LT |
599 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
600 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 601 | |
1da177e4 LT |
602 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
603 | } | |
604 | ||
cb00ea35 CG |
605 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
606 | struct nameidata *nd) | |
1da177e4 LT |
607 | { |
608 | struct udf_fileident_bh fibh; | |
609 | struct inode *inode; | |
610 | struct fileIdentDesc cfi, *fi; | |
611 | int err; | |
48d6d8ff | 612 | struct udf_inode_info *iinfo; |
1da177e4 LT |
613 | |
614 | lock_kernel(); | |
615 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 616 | if (!inode) { |
1da177e4 LT |
617 | unlock_kernel(); |
618 | return err; | |
619 | } | |
620 | ||
48d6d8ff MS |
621 | iinfo = UDF_I(inode); |
622 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
623 | inode->i_data.a_ops = &udf_adinicb_aops; |
624 | else | |
625 | inode->i_data.a_ops = &udf_aops; | |
626 | inode->i_op = &udf_file_inode_operations; | |
627 | inode->i_fop = &udf_file_operations; | |
628 | inode->i_mode = mode; | |
629 | mark_inode_dirty(inode); | |
630 | ||
4b11111a MS |
631 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
632 | if (!fi) { | |
cb00ea35 | 633 | inode->i_nlink--; |
1da177e4 LT |
634 | mark_inode_dirty(inode); |
635 | iput(inode); | |
636 | unlock_kernel(); | |
637 | return err; | |
638 | } | |
639 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 640 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 641 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 642 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 643 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 644 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 645 | mark_inode_dirty(dir); |
1da177e4 | 646 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
647 | brelse(fibh.ebh); |
648 | brelse(fibh.sbh); | |
1da177e4 LT |
649 | unlock_kernel(); |
650 | d_instantiate(dentry, inode); | |
28de7948 | 651 | |
1da177e4 LT |
652 | return 0; |
653 | } | |
654 | ||
cb00ea35 CG |
655 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
656 | dev_t rdev) | |
1da177e4 | 657 | { |
cb00ea35 | 658 | struct inode *inode; |
1da177e4 LT |
659 | struct udf_fileident_bh fibh; |
660 | struct fileIdentDesc cfi, *fi; | |
661 | int err; | |
48d6d8ff | 662 | struct udf_inode_info *iinfo; |
1da177e4 LT |
663 | |
664 | if (!old_valid_dev(rdev)) | |
665 | return -EINVAL; | |
666 | ||
667 | lock_kernel(); | |
668 | err = -EIO; | |
669 | inode = udf_new_inode(dir, mode, &err); | |
670 | if (!inode) | |
671 | goto out; | |
672 | ||
48d6d8ff | 673 | iinfo = UDF_I(inode); |
1da177e4 LT |
674 | inode->i_uid = current->fsuid; |
675 | init_special_inode(inode, mode, rdev); | |
4b11111a MS |
676 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
677 | if (!fi) { | |
cb00ea35 | 678 | inode->i_nlink--; |
1da177e4 LT |
679 | mark_inode_dirty(inode); |
680 | iput(inode); | |
681 | unlock_kernel(); | |
682 | return err; | |
683 | } | |
684 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 685 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 686 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 687 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 688 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 689 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 690 | mark_inode_dirty(dir); |
1da177e4 LT |
691 | mark_inode_dirty(inode); |
692 | ||
693 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
694 | brelse(fibh.ebh); |
695 | brelse(fibh.sbh); | |
1da177e4 LT |
696 | d_instantiate(dentry, inode); |
697 | err = 0; | |
28de7948 CG |
698 | |
699 | out: | |
1da177e4 LT |
700 | unlock_kernel(); |
701 | return err; | |
702 | } | |
703 | ||
cb00ea35 | 704 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 705 | { |
cb00ea35 | 706 | struct inode *inode; |
1da177e4 LT |
707 | struct udf_fileident_bh fibh; |
708 | struct fileIdentDesc cfi, *fi; | |
709 | int err; | |
48d6d8ff MS |
710 | struct udf_inode_info *dinfo = UDF_I(dir); |
711 | struct udf_inode_info *iinfo; | |
1da177e4 LT |
712 | |
713 | lock_kernel(); | |
714 | err = -EMLINK; | |
cb00ea35 | 715 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
716 | goto out; |
717 | ||
718 | err = -EIO; | |
719 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
720 | if (!inode) | |
721 | goto out; | |
722 | ||
48d6d8ff | 723 | iinfo = UDF_I(inode); |
1da177e4 LT |
724 | inode->i_op = &udf_dir_inode_operations; |
725 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
726 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
727 | if (!fi) { | |
1da177e4 LT |
728 | inode->i_nlink--; |
729 | mark_inode_dirty(inode); | |
730 | iput(inode); | |
731 | goto out; | |
732 | } | |
733 | inode->i_nlink = 2; | |
734 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 735 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 736 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 737 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
738 | cfi.fileCharacteristics = |
739 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 740 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 741 | brelse(fibh.sbh); |
1da177e4 LT |
742 | inode->i_mode = S_IFDIR | mode; |
743 | if (dir->i_mode & S_ISGID) | |
744 | inode->i_mode |= S_ISGID; | |
745 | mark_inode_dirty(inode); | |
746 | ||
4b11111a MS |
747 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
748 | if (!fi) { | |
1da177e4 LT |
749 | inode->i_nlink = 0; |
750 | mark_inode_dirty(inode); | |
751 | iput(inode); | |
752 | goto out; | |
753 | } | |
754 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 755 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 756 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 757 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
758 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
759 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 760 | inc_nlink(dir); |
1da177e4 LT |
761 | mark_inode_dirty(dir); |
762 | d_instantiate(dentry, inode); | |
763 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
764 | brelse(fibh.ebh); |
765 | brelse(fibh.sbh); | |
1da177e4 | 766 | err = 0; |
28de7948 CG |
767 | |
768 | out: | |
1da177e4 LT |
769 | unlock_kernel(); |
770 | return err; | |
771 | } | |
772 | ||
773 | static int empty_dir(struct inode *dir) | |
774 | { | |
775 | struct fileIdentDesc *fi, cfi; | |
776 | struct udf_fileident_bh fibh; | |
777 | loff_t f_pos; | |
778 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
779 | int block; | |
ff116fc8 JK |
780 | kernel_lb_addr eloc; |
781 | uint32_t elen; | |
60448b1d | 782 | sector_t offset; |
28de7948 | 783 | struct extent_position epos = {}; |
48d6d8ff | 784 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 LT |
785 | |
786 | f_pos = (udf_ext0_offset(dir) >> 2); | |
787 | ||
4b11111a MS |
788 | fibh.soffset = fibh.eoffset = |
789 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
1da177e4 | 790 | |
48d6d8ff | 791 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 792 | fibh.sbh = fibh.ebh = NULL; |
4b11111a MS |
793 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
794 | &epos, &eloc, &elen, &offset) == | |
795 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 796 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 797 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 798 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 799 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 800 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 801 | epos.offset -= sizeof(long_ad); |
4b11111a | 802 | } else |
1da177e4 LT |
803 | offset = 0; |
804 | ||
4b11111a MS |
805 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
806 | if (!fibh.sbh) { | |
3bf25cb4 | 807 | brelse(epos.bh); |
1da177e4 LT |
808 | return 0; |
809 | } | |
cb00ea35 | 810 | } else { |
3bf25cb4 | 811 | brelse(epos.bh); |
1da177e4 LT |
812 | return 0; |
813 | } | |
814 | ||
cb00ea35 CG |
815 | while ((f_pos < size)) { |
816 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, | |
817 | &elen, &offset); | |
cb00ea35 | 818 | if (!fi) { |
1da177e4 | 819 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
820 | brelse(fibh.ebh); |
821 | brelse(fibh.sbh); | |
822 | brelse(epos.bh); | |
1da177e4 LT |
823 | return 0; |
824 | } | |
825 | ||
28de7948 CG |
826 | if (cfi.lengthFileIdent && |
827 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 828 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
829 | brelse(fibh.ebh); |
830 | brelse(fibh.sbh); | |
831 | brelse(epos.bh); | |
1da177e4 LT |
832 | return 0; |
833 | } | |
834 | } | |
28de7948 | 835 | |
1da177e4 | 836 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
837 | brelse(fibh.ebh); |
838 | brelse(fibh.sbh); | |
839 | brelse(epos.bh); | |
28de7948 | 840 | |
1da177e4 LT |
841 | return 1; |
842 | } | |
843 | ||
cb00ea35 | 844 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
845 | { |
846 | int retval; | |
cb00ea35 | 847 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
848 | struct udf_fileident_bh fibh; |
849 | struct fileIdentDesc *fi, cfi; | |
850 | kernel_lb_addr tloc; | |
851 | ||
852 | retval = -ENOENT; | |
853 | lock_kernel(); | |
854 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
855 | if (!fi) | |
856 | goto out; | |
857 | ||
858 | retval = -EIO; | |
859 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
860 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
861 | goto end_rmdir; | |
862 | retval = -ENOTEMPTY; | |
863 | if (!empty_dir(inode)) | |
864 | goto end_rmdir; | |
865 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
866 | if (retval) | |
867 | goto end_rmdir; | |
868 | if (inode->i_nlink != 2) | |
869 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
870 | "empty directory has nlink != 2 (%d)", |
871 | inode->i_nlink); | |
ce71ec36 | 872 | clear_nlink(inode); |
1da177e4 | 873 | inode->i_size = 0; |
c007c06e | 874 | inode_dec_link_count(dir); |
4b11111a MS |
875 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
876 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
877 | mark_inode_dirty(dir); |
878 | ||
28de7948 | 879 | end_rmdir: |
1da177e4 | 880 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
881 | brelse(fibh.ebh); |
882 | brelse(fibh.sbh); | |
28de7948 CG |
883 | |
884 | out: | |
1da177e4 LT |
885 | unlock_kernel(); |
886 | return retval; | |
887 | } | |
888 | ||
cb00ea35 | 889 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
890 | { |
891 | int retval; | |
cb00ea35 | 892 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
893 | struct udf_fileident_bh fibh; |
894 | struct fileIdentDesc *fi; | |
895 | struct fileIdentDesc cfi; | |
896 | kernel_lb_addr tloc; | |
897 | ||
898 | retval = -ENOENT; | |
899 | lock_kernel(); | |
900 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
901 | if (!fi) | |
902 | goto out; | |
903 | ||
904 | retval = -EIO; | |
905 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
906 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
907 | goto end_unlink; | |
908 | ||
cb00ea35 | 909 | if (!inode->i_nlink) { |
1da177e4 | 910 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 911 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
912 | inode->i_nlink = 1; |
913 | } | |
914 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
915 | if (retval) | |
916 | goto end_unlink; | |
917 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
918 | mark_inode_dirty(dir); | |
9a53c3a7 | 919 | inode_dec_link_count(inode); |
1da177e4 LT |
920 | inode->i_ctime = dir->i_ctime; |
921 | retval = 0; | |
922 | ||
28de7948 | 923 | end_unlink: |
1da177e4 | 924 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
925 | brelse(fibh.ebh); |
926 | brelse(fibh.sbh); | |
28de7948 CG |
927 | |
928 | out: | |
1da177e4 LT |
929 | unlock_kernel(); |
930 | return retval; | |
931 | } | |
932 | ||
cb00ea35 CG |
933 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
934 | const char *symname) | |
1da177e4 | 935 | { |
cb00ea35 | 936 | struct inode *inode; |
1da177e4 LT |
937 | struct pathComponent *pc; |
938 | char *compstart; | |
939 | struct udf_fileident_bh fibh; | |
28de7948 | 940 | struct extent_position epos = {}; |
1da177e4 LT |
941 | int eoffset, elen = 0; |
942 | struct fileIdentDesc *fi; | |
943 | struct fileIdentDesc cfi; | |
944 | char *ea; | |
945 | int err; | |
946 | int block; | |
947 | char name[UDF_NAME_LEN]; | |
948 | int namelen; | |
6c79e987 | 949 | struct buffer_head *bh; |
48d6d8ff | 950 | struct udf_inode_info *iinfo; |
1da177e4 LT |
951 | |
952 | lock_kernel(); | |
4b11111a MS |
953 | inode = udf_new_inode(dir, S_IFLNK, &err); |
954 | if (!inode) | |
1da177e4 LT |
955 | goto out; |
956 | ||
48d6d8ff | 957 | iinfo = UDF_I(inode); |
1da177e4 LT |
958 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
959 | inode->i_data.a_ops = &udf_symlink_aops; | |
960 | inode->i_op = &page_symlink_inode_operations; | |
961 | ||
48d6d8ff | 962 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 JK |
963 | kernel_lb_addr eloc; |
964 | uint32_t elen; | |
1da177e4 LT |
965 | |
966 | block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
967 | iinfo->i_location.partitionReferenceNum, |
968 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
969 | if (!block) |
970 | goto out_no_entry; | |
48d6d8ff | 971 | epos.block = iinfo->i_location; |
ff116fc8 JK |
972 | epos.offset = udf_file_entry_alloc_offset(inode); |
973 | epos.bh = NULL; | |
1da177e4 | 974 | eloc.logicalBlockNum = block; |
4b11111a | 975 | eloc.partitionReferenceNum = |
48d6d8ff | 976 | iinfo->i_location.partitionReferenceNum; |
1da177e4 | 977 | elen = inode->i_sb->s_blocksize; |
48d6d8ff | 978 | iinfo->i_lenExtents = elen; |
ff116fc8 | 979 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 980 | brelse(epos.bh); |
1da177e4 LT |
981 | |
982 | block = udf_get_pblock(inode->i_sb, block, | |
48d6d8ff | 983 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 984 | 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); | |
48d6d8ff MS |
992 | } else |
993 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 LT |
994 | |
995 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
996 | pc = (struct pathComponent *)ea; | |
997 | ||
cb00ea35 CG |
998 | if (*symname == '/') { |
999 | do { | |
1da177e4 LT |
1000 | symname++; |
1001 | } while (*symname == '/'); | |
1002 | ||
1003 | pc->componentType = 1; | |
1004 | pc->lengthComponentIdent = 0; | |
1005 | pc->componentFileVersionNum = 0; | |
1006 | pc += sizeof(struct pathComponent); | |
1007 | elen += sizeof(struct pathComponent); | |
1008 | } | |
1009 | ||
1010 | err = -ENAMETOOLONG; | |
1011 | ||
cb00ea35 | 1012 | while (*symname) { |
1da177e4 LT |
1013 | if (elen + sizeof(struct pathComponent) > eoffset) |
1014 | goto out_no_entry; | |
1015 | ||
1016 | pc = (struct pathComponent *)(ea + elen); | |
1017 | ||
1018 | compstart = (char *)symname; | |
1019 | ||
cb00ea35 | 1020 | do { |
1da177e4 LT |
1021 | symname++; |
1022 | } while (*symname && *symname != '/'); | |
1023 | ||
1024 | pc->componentType = 5; | |
1025 | pc->lengthComponentIdent = 0; | |
1026 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
1027 | if (compstart[0] == '.') { |
1028 | if ((symname - compstart) == 1) | |
1da177e4 | 1029 | pc->componentType = 4; |
4b11111a MS |
1030 | else if ((symname - compstart) == 2 && |
1031 | compstart[1] == '.') | |
1da177e4 LT |
1032 | pc->componentType = 3; |
1033 | } | |
1034 | ||
cb00ea35 | 1035 | if (pc->componentType == 5) { |
28de7948 CG |
1036 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
1037 | symname - compstart); | |
1038 | if (!namelen) | |
1da177e4 LT |
1039 | goto out_no_entry; |
1040 | ||
4b11111a MS |
1041 | if (elen + sizeof(struct pathComponent) + namelen > |
1042 | eoffset) | |
1da177e4 LT |
1043 | goto out_no_entry; |
1044 | else | |
1045 | pc->lengthComponentIdent = namelen; | |
1046 | ||
1047 | memcpy(pc->componentIdent, name, namelen); | |
1048 | } | |
1049 | ||
1050 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1051 | ||
cb00ea35 CG |
1052 | if (*symname) { |
1053 | do { | |
1da177e4 LT |
1054 | symname++; |
1055 | } while (*symname == '/'); | |
1056 | } | |
1057 | } | |
1058 | ||
3bf25cb4 | 1059 | brelse(epos.bh); |
1da177e4 | 1060 | inode->i_size = elen; |
48d6d8ff MS |
1061 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1062 | iinfo->i_lenAlloc = inode->i_size; | |
1da177e4 LT |
1063 | mark_inode_dirty(inode); |
1064 | ||
4b11111a MS |
1065 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1066 | if (!fi) | |
1da177e4 LT |
1067 | goto out_no_entry; |
1068 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 1069 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
6c79e987 MS |
1070 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1071 | if (bh) { | |
4b11111a MS |
1072 | struct logicalVolIntegrityDesc *lvid = |
1073 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1074 | struct logicalVolHeaderDesc *lvhd; |
1075 | uint64_t uniqueID; | |
4b11111a MS |
1076 | lvhd = (struct logicalVolHeaderDesc *) |
1077 | lvid->logicalVolContentsUse; | |
1da177e4 | 1078 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1079 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1080 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1081 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1082 | uniqueID += 16; | |
1083 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1084 | mark_buffer_dirty(bh); |
1da177e4 LT |
1085 | } |
1086 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1087 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1088 | mark_inode_dirty(dir); |
1da177e4 | 1089 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1090 | brelse(fibh.ebh); |
1091 | brelse(fibh.sbh); | |
1da177e4 LT |
1092 | d_instantiate(dentry, inode); |
1093 | err = 0; | |
1094 | ||
28de7948 | 1095 | out: |
1da177e4 LT |
1096 | unlock_kernel(); |
1097 | return err; | |
1098 | ||
28de7948 | 1099 | out_no_entry: |
9a53c3a7 | 1100 | inode_dec_link_count(inode); |
1da177e4 LT |
1101 | iput(inode); |
1102 | goto out; | |
1103 | } | |
1104 | ||
cb00ea35 CG |
1105 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1106 | struct dentry *dentry) | |
1da177e4 LT |
1107 | { |
1108 | struct inode *inode = old_dentry->d_inode; | |
1109 | struct udf_fileident_bh fibh; | |
1110 | struct fileIdentDesc cfi, *fi; | |
1111 | int err; | |
6c79e987 | 1112 | struct buffer_head *bh; |
1da177e4 LT |
1113 | |
1114 | lock_kernel(); | |
cb00ea35 | 1115 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1116 | unlock_kernel(); |
1117 | return -EMLINK; | |
1118 | } | |
1119 | ||
4b11111a MS |
1120 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1121 | if (!fi) { | |
1da177e4 LT |
1122 | unlock_kernel(); |
1123 | return err; | |
1124 | } | |
1125 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1126 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1127 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1128 | if (bh) { | |
4b11111a MS |
1129 | struct logicalVolIntegrityDesc *lvid = |
1130 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1131 | struct logicalVolHeaderDesc *lvhd; |
1132 | uint64_t uniqueID; | |
4b11111a MS |
1133 | lvhd = (struct logicalVolHeaderDesc *) |
1134 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1135 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1136 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1137 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1138 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1139 | uniqueID += 16; | |
1140 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1141 | mark_buffer_dirty(bh); |
1da177e4 LT |
1142 | } |
1143 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1144 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1145 | mark_inode_dirty(dir); |
28de7948 | 1146 | |
1da177e4 | 1147 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1148 | brelse(fibh.ebh); |
1149 | brelse(fibh.sbh); | |
d8c76e6f | 1150 | inc_nlink(inode); |
1da177e4 LT |
1151 | inode->i_ctime = current_fs_time(inode->i_sb); |
1152 | mark_inode_dirty(inode); | |
1153 | atomic_inc(&inode->i_count); | |
1154 | d_instantiate(dentry, inode); | |
1155 | unlock_kernel(); | |
28de7948 | 1156 | |
1da177e4 LT |
1157 | return 0; |
1158 | } | |
1159 | ||
1160 | /* Anybody can rename anything with this: the permission checks are left to the | |
1161 | * higher-level routines. | |
1162 | */ | |
cb00ea35 CG |
1163 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1164 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1165 | { |
cb00ea35 CG |
1166 | struct inode *old_inode = old_dentry->d_inode; |
1167 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1168 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1169 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1170 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1171 | struct buffer_head *dir_bh = NULL; |
1172 | int retval = -ENOENT; | |
1173 | kernel_lb_addr tloc; | |
48d6d8ff | 1174 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 LT |
1175 | |
1176 | lock_kernel(); | |
4b11111a MS |
1177 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); |
1178 | if (ofi) { | |
1da177e4 | 1179 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1180 | brelse(ofibh.ebh); |
1181 | brelse(ofibh.sbh); | |
1da177e4 LT |
1182 | } |
1183 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1184 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1185 | != old_inode->i_ino) |
1da177e4 LT |
1186 | goto end_rename; |
1187 | ||
1188 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1189 | if (nfi) { |
1190 | if (!new_inode) { | |
1da177e4 | 1191 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1192 | brelse(nfibh.ebh); |
1193 | brelse(nfibh.sbh); | |
1da177e4 LT |
1194 | nfi = NULL; |
1195 | } | |
1196 | } | |
cb00ea35 | 1197 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1198 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1199 | |
cb00ea35 | 1200 | if (new_inode) { |
1da177e4 LT |
1201 | retval = -ENOTEMPTY; |
1202 | if (!empty_dir(new_inode)) | |
1203 | goto end_rename; | |
1204 | } | |
1205 | retval = -EIO; | |
48d6d8ff | 1206 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1207 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1208 | old_iinfo->i_ext.i_data - |
1209 | (old_iinfo->i_efe ? | |
4b11111a MS |
1210 | sizeof(struct extendedFileEntry) : |
1211 | sizeof(struct fileEntry)), | |
1212 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1213 | } else { |
1da177e4 LT |
1214 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1215 | if (!dir_bh) | |
1216 | goto end_rename; | |
4b11111a MS |
1217 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1218 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1219 | } |
1220 | if (!dir_fi) | |
1221 | goto end_rename; | |
1222 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
4b11111a MS |
1223 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != |
1224 | old_dir->i_ino) | |
1da177e4 LT |
1225 | goto end_rename; |
1226 | ||
1227 | retval = -EMLINK; | |
4b11111a MS |
1228 | if (!new_inode && |
1229 | new_dir->i_nlink >= | |
1230 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1231 | goto end_rename; |
1232 | } | |
cb00ea35 | 1233 | if (!nfi) { |
4b11111a MS |
1234 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1235 | &retval); | |
1da177e4 LT |
1236 | if (!nfi) |
1237 | goto end_rename; | |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * Like most other Unix systems, set the ctime for inodes on a | |
1242 | * rename. | |
1243 | */ | |
1244 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1245 | mark_inode_dirty(old_inode); | |
1246 | ||
1247 | /* | |
1248 | * ok, that's it | |
1249 | */ | |
1250 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1251 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1252 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1253 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1254 | ||
1255 | /* The old fid may have moved - find it again */ | |
1256 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1257 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1258 | ||
cb00ea35 | 1259 | if (new_inode) { |
1da177e4 | 1260 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1261 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1262 | } |
1263 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1264 | mark_inode_dirty(old_dir); | |
1265 | ||
cb00ea35 | 1266 | if (dir_fi) { |
c0b34438 | 1267 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1268 | udf_update_tag((char *)dir_fi, |
1269 | (sizeof(struct fileIdentDesc) + | |
1270 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1271 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1272 | mark_inode_dirty(old_inode); |
4b11111a | 1273 | else |
1da177e4 | 1274 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1275 | |
9a53c3a7 | 1276 | inode_dec_link_count(old_dir); |
4b11111a | 1277 | if (new_inode) |
9a53c3a7 | 1278 | inode_dec_link_count(new_inode); |
4b11111a | 1279 | else { |
d8c76e6f | 1280 | inc_nlink(new_dir); |
1da177e4 LT |
1281 | mark_inode_dirty(new_dir); |
1282 | } | |
1283 | } | |
1284 | ||
cb00ea35 | 1285 | if (ofi) { |
1da177e4 | 1286 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1287 | brelse(ofibh.ebh); |
1288 | brelse(ofibh.sbh); | |
1da177e4 LT |
1289 | } |
1290 | ||
1291 | retval = 0; | |
1292 | ||
28de7948 | 1293 | end_rename: |
3bf25cb4 | 1294 | brelse(dir_bh); |
cb00ea35 | 1295 | if (nfi) { |
1da177e4 | 1296 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1297 | brelse(nfibh.ebh); |
1298 | brelse(nfibh.sbh); | |
1da177e4 LT |
1299 | } |
1300 | unlock_kernel(); | |
28de7948 | 1301 | |
1da177e4 LT |
1302 | return retval; |
1303 | } | |
1304 | ||
c5ef1c42 | 1305 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1306 | .lookup = udf_lookup, |
1307 | .create = udf_create, | |
1308 | .link = udf_link, | |
1309 | .unlink = udf_unlink, | |
1310 | .symlink = udf_symlink, | |
1311 | .mkdir = udf_mkdir, | |
1312 | .rmdir = udf_rmdir, | |
1313 | .mknod = udf_mknod, | |
1314 | .rename = udf_rename, | |
1da177e4 | 1315 | }; |