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