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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; | |
50 | uint8_t checksum = 0; | |
51 | int i; | |
52 | int offset; | |
53 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
54 | uint8_t lfi = cfi->lengthFileIdent; | |
55 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
28de7948 | 56 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
57 | int adinicb = 0; |
58 | ||
59 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
60 | adinicb = 1; | |
61 | ||
62 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
63 | ||
cb00ea35 | 64 | if (impuse) { |
28de7948 CG |
65 | if (adinicb || (offset + liu < 0)) { |
66 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
67 | } else if (offset >= 0) { | |
1da177e4 | 68 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
28de7948 CG |
69 | } else { |
70 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
4b11111a MS |
71 | memcpy(fibh->ebh->b_data, impuse - offset, |
72 | liu + offset); | |
1da177e4 LT |
73 | } |
74 | } | |
75 | ||
76 | offset += liu; | |
77 | ||
cb00ea35 | 78 | if (fileident) { |
28de7948 CG |
79 | if (adinicb || (offset + lfi < 0)) { |
80 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
81 | } else if (offset >= 0) { | |
1da177e4 | 82 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 83 | } else { |
4b11111a MS |
84 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
85 | -offset); | |
86 | memcpy(fibh->ebh->b_data, fileident - offset, | |
87 | lfi + offset); | |
1da177e4 LT |
88 | } |
89 | } | |
90 | ||
91 | offset += lfi; | |
92 | ||
28de7948 CG |
93 | if (adinicb || (offset + padlen < 0)) { |
94 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
95 | } else if (offset >= 0) { | |
1da177e4 | 96 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
97 | } else { |
98 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
99 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
100 | } | |
101 | ||
28de7948 CG |
102 | crc = udf_crc((uint8_t *)cfi + sizeof(tag), |
103 | sizeof(struct fileIdentDesc) - sizeof(tag), 0); | |
104 | ||
105 | if (fibh->sbh == fibh->ebh) { | |
106 | crc = udf_crc((uint8_t *)sfi->impUse, | |
4b11111a MS |
107 | crclen + sizeof(tag) - |
108 | sizeof(struct fileIdentDesc), crc); | |
28de7948 | 109 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
4b11111a MS |
110 | crc = udf_crc(fibh->ebh->b_data + |
111 | sizeof(struct fileIdentDesc) + | |
112 | fibh->soffset, | |
113 | crclen + sizeof(tag) - | |
114 | sizeof(struct fileIdentDesc), | |
115 | crc); | |
28de7948 CG |
116 | } else { |
117 | crc = udf_crc((uint8_t *)sfi->impUse, | |
4b11111a MS |
118 | -fibh->soffset - sizeof(struct fileIdentDesc), |
119 | crc); | |
1da177e4 LT |
120 | crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc); |
121 | } | |
122 | ||
123 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
124 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
125 | ||
28de7948 | 126 | for (i = 0; i < 16; i++) { |
1da177e4 | 127 | if (i != 4) |
28de7948 CG |
128 | checksum += ((uint8_t *)&cfi->descTag)[i]; |
129 | } | |
1da177e4 LT |
130 | |
131 | cfi->descTag.tagChecksum = checksum; | |
28de7948 | 132 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
4b11111a MS |
133 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
134 | sizeof(struct fileIdentDesc)); | |
28de7948 CG |
135 | } else { |
136 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
137 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 138 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
139 | } |
140 | ||
28de7948 | 141 | if (adinicb) { |
1da177e4 | 142 | mark_inode_dirty(inode); |
28de7948 | 143 | } else { |
1da177e4 LT |
144 | if (fibh->sbh != fibh->ebh) |
145 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
146 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
147 | } | |
148 | return 0; | |
149 | } | |
150 | ||
cb00ea35 CG |
151 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
152 | struct dentry *dentry, | |
153 | struct udf_fileident_bh *fibh, | |
154 | struct fileIdentDesc *cfi) | |
1da177e4 | 155 | { |
cb00ea35 | 156 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
157 | loff_t f_pos; |
158 | int block, flen; | |
159 | char fname[UDF_NAME_LEN]; | |
160 | char *nameptr; | |
161 | uint8_t lfi; | |
162 | uint16_t liu; | |
ec471dc4 | 163 | loff_t size; |
ff116fc8 JK |
164 | kernel_lb_addr eloc; |
165 | uint32_t elen; | |
60448b1d | 166 | sector_t offset; |
28de7948 | 167 | struct extent_position epos = {}; |
1da177e4 | 168 | |
ec471dc4 | 169 | size = (udf_ext0_offset(dir) + dir->i_size) >> 2; |
1da177e4 LT |
170 | f_pos = (udf_ext0_offset(dir) >> 2); |
171 | ||
4b11111a MS |
172 | fibh->soffset = fibh->eoffset = |
173 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
174 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 | 175 | fibh->sbh = fibh->ebh = NULL; |
4b11111a MS |
176 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
177 | &epos, &eloc, &elen, &offset) == | |
178 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 179 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 180 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 181 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 182 | epos.offset -= sizeof(short_ad); |
1da177e4 | 183 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 184 | epos.offset -= sizeof(long_ad); |
4b11111a | 185 | } else |
1da177e4 LT |
186 | offset = 0; |
187 | ||
4b11111a MS |
188 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
189 | if (!fibh->sbh) { | |
3bf25cb4 | 190 | brelse(epos.bh); |
1da177e4 LT |
191 | return NULL; |
192 | } | |
cb00ea35 | 193 | } else { |
3bf25cb4 | 194 | brelse(epos.bh); |
1da177e4 LT |
195 | return NULL; |
196 | } | |
197 | ||
cb00ea35 CG |
198 | while ((f_pos < size)) { |
199 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, | |
200 | &elen, &offset); | |
cb00ea35 | 201 | if (!fi) { |
1da177e4 | 202 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
203 | brelse(fibh->ebh); |
204 | brelse(fibh->sbh); | |
205 | brelse(epos.bh); | |
1da177e4 LT |
206 | return NULL; |
207 | } | |
208 | ||
209 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
210 | lfi = cfi->lengthFileIdent; | |
211 | ||
cb00ea35 | 212 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 213 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 214 | } else { |
1da177e4 LT |
215 | int poffset; /* Unpaded ending offset */ |
216 | ||
4b11111a MS |
217 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
218 | liu + lfi; | |
1da177e4 | 219 | |
4b11111a MS |
220 | if (poffset >= lfi) |
221 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
222 | poffset - lfi); | |
223 | else { | |
1da177e4 | 224 | nameptr = fname; |
4b11111a MS |
225 | memcpy(nameptr, fi->fileIdent + liu, |
226 | lfi - poffset); | |
227 | memcpy(nameptr + lfi - poffset, | |
228 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
229 | } |
230 | } | |
231 | ||
cb00ea35 CG |
232 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
233 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
234 | continue; |
235 | } | |
cb00ea35 CG |
236 | |
237 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
238 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
239 | continue; |
240 | } | |
241 | ||
242 | if (!lfi) | |
243 | continue; | |
244 | ||
4b11111a MS |
245 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
246 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
247 | dentry->d_name.name)) { | |
248 | brelse(epos.bh); | |
249 | return fi; | |
1da177e4 LT |
250 | } |
251 | } | |
28de7948 | 252 | |
1da177e4 | 253 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
254 | brelse(fibh->ebh); |
255 | brelse(fibh->sbh); | |
256 | brelse(epos.bh); | |
28de7948 | 257 | |
1da177e4 LT |
258 | return NULL; |
259 | } | |
260 | ||
261 | /* | |
262 | * udf_lookup | |
263 | * | |
264 | * PURPOSE | |
265 | * Look-up the inode for a given name. | |
266 | * | |
267 | * DESCRIPTION | |
268 | * Required - lookup_dentry() will return -ENOTDIR if this routine is not | |
269 | * available for a directory. The filesystem is useless if this routine is | |
270 | * not available for at least the filesystem's root directory. | |
271 | * | |
272 | * This routine is passed an incomplete dentry - it must be completed by | |
273 | * calling d_add(dentry, inode). If the name does not exist, then the | |
274 | * specified inode must be set to null. An error should only be returned | |
275 | * when the lookup fails for a reason other than the name not existing. | |
276 | * Note that the directory inode semaphore is held during the call. | |
277 | * | |
278 | * Refer to lookup_dentry() in fs/namei.c | |
279 | * lookup_dentry() -> lookup() -> real_lookup() -> . | |
280 | * | |
281 | * PRE-CONDITIONS | |
282 | * dir Pointer to inode of parent directory. | |
283 | * dentry Pointer to dentry to complete. | |
284 | * nd Pointer to lookup nameidata | |
285 | * | |
286 | * POST-CONDITIONS | |
287 | * <return> Zero on success. | |
288 | * | |
289 | * HISTORY | |
290 | * July 1, 1997 - Andrew E. Mileski | |
291 | * Written, tested, and released. | |
292 | */ | |
293 | ||
cb00ea35 CG |
294 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
295 | struct nameidata *nd) | |
1da177e4 LT |
296 | { |
297 | struct inode *inode = NULL; | |
db9a369e | 298 | struct fileIdentDesc cfi; |
1da177e4 LT |
299 | struct udf_fileident_bh fibh; |
300 | ||
cb00ea35 | 301 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
302 | return ERR_PTR(-ENAMETOOLONG); |
303 | ||
304 | lock_kernel(); | |
305 | #ifdef UDF_RECOVERY | |
306 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 307 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
28de7948 CG |
308 | kernel_lb_addr lb = { |
309 | .logicalBlockNum = 0, | |
4b11111a MS |
310 | .partitionReferenceNum = |
311 | simple_strtoul(dentry->d_name.name + 3, | |
312 | NULL, 0), | |
28de7948 | 313 | }; |
1da177e4 | 314 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 315 | if (!inode) { |
1da177e4 LT |
316 | unlock_kernel(); |
317 | return ERR_PTR(-EACCES); | |
318 | } | |
4b11111a | 319 | } else |
28de7948 | 320 | #endif /* UDF_RECOVERY */ |
1da177e4 | 321 | |
cb00ea35 | 322 | if (udf_find_entry(dir, dentry, &fibh, &cfi)) { |
1da177e4 | 323 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
324 | brelse(fibh.ebh); |
325 | brelse(fibh.sbh); | |
1da177e4 LT |
326 | |
327 | inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); | |
cb00ea35 | 328 | if (!inode) { |
1da177e4 LT |
329 | unlock_kernel(); |
330 | return ERR_PTR(-EACCES); | |
331 | } | |
332 | } | |
333 | unlock_kernel(); | |
334 | d_add(dentry, inode); | |
28de7948 | 335 | |
1da177e4 LT |
336 | return NULL; |
337 | } | |
338 | ||
cb00ea35 CG |
339 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
340 | struct dentry *dentry, | |
341 | struct udf_fileident_bh *fibh, | |
342 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 343 | { |
6c79e987 | 344 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 345 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
346 | char name[UDF_NAME_LEN], fname[UDF_NAME_LEN]; |
347 | int namelen; | |
348 | loff_t f_pos; | |
349 | int flen; | |
350 | char *nameptr; | |
351 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
352 | int nfidlen; | |
353 | uint8_t lfi; | |
354 | uint16_t liu; | |
355 | int block; | |
ff116fc8 JK |
356 | kernel_lb_addr eloc; |
357 | uint32_t elen; | |
60448b1d | 358 | sector_t offset; |
28de7948 | 359 | struct extent_position epos = {}; |
1da177e4 | 360 | |
cb00ea35 CG |
361 | if (dentry) { |
362 | if (!dentry->d_name.len) { | |
1da177e4 LT |
363 | *err = -EINVAL; |
364 | return NULL; | |
365 | } | |
4b11111a MS |
366 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
367 | dentry->d_name.len); | |
368 | if (!namelen) { | |
1da177e4 LT |
369 | *err = -ENAMETOOLONG; |
370 | return NULL; | |
371 | } | |
28de7948 | 372 | } else { |
1da177e4 | 373 | namelen = 0; |
28de7948 | 374 | } |
1da177e4 LT |
375 | |
376 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
377 | ||
378 | f_pos = (udf_ext0_offset(dir) >> 2); | |
379 | ||
4b11111a MS |
380 | fibh->soffset = fibh->eoffset = |
381 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
382 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 | 383 | fibh->sbh = fibh->ebh = NULL; |
4b11111a MS |
384 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
385 | &epos, &eloc, &elen, &offset) == | |
386 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 387 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 388 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 389 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 390 | epos.offset -= sizeof(short_ad); |
1da177e4 | 391 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 392 | epos.offset -= sizeof(long_ad); |
4b11111a | 393 | } else |
1da177e4 LT |
394 | offset = 0; |
395 | ||
4b11111a MS |
396 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
397 | if (!fibh->sbh) { | |
3bf25cb4 | 398 | brelse(epos.bh); |
1da177e4 LT |
399 | *err = -EIO; |
400 | return NULL; | |
401 | } | |
402 | ||
403 | block = UDF_I_LOCATION(dir).logicalBlockNum; | |
404 | ||
cb00ea35 | 405 | } else { |
1da177e4 LT |
406 | block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0); |
407 | fibh->sbh = fibh->ebh = NULL; | |
408 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
409 | goto add; | |
410 | } | |
411 | ||
cb00ea35 CG |
412 | while ((f_pos < size)) { |
413 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, | |
414 | &elen, &offset); | |
1da177e4 | 415 | |
cb00ea35 | 416 | if (!fi) { |
1da177e4 | 417 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
418 | brelse(fibh->ebh); |
419 | brelse(fibh->sbh); | |
420 | brelse(epos.bh); | |
1da177e4 LT |
421 | *err = -EIO; |
422 | return NULL; | |
423 | } | |
424 | ||
425 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
426 | lfi = cfi->lengthFileIdent; | |
427 | ||
4b11111a | 428 | if (fibh->sbh == fibh->ebh) |
1da177e4 | 429 | nameptr = fi->fileIdent + liu; |
4b11111a | 430 | else { |
1da177e4 LT |
431 | int poffset; /* Unpaded ending offset */ |
432 | ||
4b11111a MS |
433 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
434 | liu + lfi; | |
1da177e4 | 435 | |
4b11111a MS |
436 | if (poffset >= lfi) |
437 | nameptr = (char *)(fibh->ebh->b_data + | |
438 | poffset - lfi); | |
439 | else { | |
1da177e4 | 440 | nameptr = fname; |
4b11111a MS |
441 | memcpy(nameptr, fi->fileIdent + liu, |
442 | lfi - poffset); | |
443 | memcpy(nameptr + lfi - poffset, | |
444 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
445 | } |
446 | } | |
447 | ||
cb00ea35 | 448 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
449 | if (((sizeof(struct fileIdentDesc) + |
450 | liu + lfi + 3) & ~3) == nfidlen) { | |
3bf25cb4 | 451 | brelse(epos.bh); |
1da177e4 LT |
452 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
453 | cfi->fileVersionNum = cpu_to_le16(1); | |
454 | cfi->fileCharacteristics = 0; | |
455 | cfi->lengthFileIdent = namelen; | |
456 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
457 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
458 | name)) | |
1da177e4 | 459 | return fi; |
4b11111a | 460 | else { |
1da177e4 LT |
461 | *err = -EIO; |
462 | return NULL; | |
463 | } | |
464 | } | |
465 | } | |
466 | ||
467 | if (!lfi || !dentry) | |
468 | continue; | |
469 | ||
4b11111a MS |
470 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
471 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
472 | dentry->d_name.name)) { | |
1da177e4 | 473 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
474 | brelse(fibh->ebh); |
475 | brelse(fibh->sbh); | |
476 | brelse(epos.bh); | |
1da177e4 LT |
477 | *err = -EEXIST; |
478 | return NULL; | |
479 | } | |
480 | } | |
481 | ||
28de7948 | 482 | add: |
1da177e4 LT |
483 | f_pos += nfidlen; |
484 | ||
485 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB && | |
cb00ea35 | 486 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 487 | brelse(epos.bh); |
ff116fc8 | 488 | epos.bh = NULL; |
1da177e4 LT |
489 | fibh->soffset -= udf_ext0_offset(dir); |
490 | fibh->eoffset -= udf_ext0_offset(dir); | |
491 | f_pos -= (udf_ext0_offset(dir) >> 2); | |
492 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
493 | brelse(fibh->ebh); |
494 | brelse(fibh->sbh); | |
4b11111a MS |
495 | fibh->sbh = fibh->ebh = |
496 | udf_expand_dir_adinicb(dir, &block, err); | |
497 | if (!fibh->sbh) | |
1da177e4 | 498 | return NULL; |
ff116fc8 | 499 | epos.block = UDF_I_LOCATION(dir); |
1da177e4 | 500 | eloc.logicalBlockNum = block; |
4b11111a MS |
501 | eloc.partitionReferenceNum = |
502 | UDF_I_LOCATION(dir).partitionReferenceNum; | |
1da177e4 | 503 | elen = dir->i_sb->s_blocksize; |
ff116fc8 | 504 | epos.offset = udf_file_entry_alloc_offset(dir); |
1da177e4 | 505 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 506 | epos.offset += sizeof(short_ad); |
1da177e4 | 507 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 508 | epos.offset += sizeof(long_ad); |
1da177e4 LT |
509 | } |
510 | ||
cb00ea35 | 511 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
512 | fibh->soffset = fibh->eoffset; |
513 | fibh->eoffset += nfidlen; | |
cb00ea35 | 514 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 515 | brelse(fibh->sbh); |
1da177e4 LT |
516 | fibh->sbh = fibh->ebh; |
517 | } | |
518 | ||
cb00ea35 | 519 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 520 | block = UDF_I_LOCATION(dir).logicalBlockNum; |
4b11111a MS |
521 | fi = (struct fileIdentDesc *) |
522 | (UDF_I_DATA(dir) + fibh->soffset - | |
523 | udf_ext0_offset(dir) + | |
524 | UDF_I_LENEATTR(dir)); | |
cb00ea35 | 525 | } else { |
4b11111a MS |
526 | block = eloc.logicalBlockNum + |
527 | ((elen - 1) >> | |
528 | dir->i_sb->s_blocksize_bits); | |
529 | fi = (struct fileIdentDesc *) | |
530 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 531 | } |
cb00ea35 | 532 | } else { |
1da177e4 LT |
533 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
534 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 535 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 536 | brelse(fibh->sbh); |
1da177e4 LT |
537 | fibh->sbh = fibh->ebh; |
538 | } | |
539 | ||
540 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 541 | dir->i_sb->s_blocksize_bits); |
4b11111a MS |
542 | fibh->ebh = udf_bread(dir, |
543 | f_pos >> (dir->i_sb->s_blocksize_bits - 2), | |
544 | 1, err); | |
28de7948 | 545 | if (!fibh->ebh) { |
3bf25cb4 JK |
546 | brelse(epos.bh); |
547 | brelse(fibh->sbh); | |
1da177e4 LT |
548 | return NULL; |
549 | } | |
550 | ||
28de7948 | 551 | if (!fibh->soffset) { |
ff116fc8 | 552 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 553 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 554 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 | 555 | dir->i_sb->s_blocksize_bits); |
4b11111a | 556 | } else |
cb00ea35 | 557 | block++; |
1da177e4 | 558 | |
3bf25cb4 | 559 | brelse(fibh->sbh); |
1da177e4 LT |
560 | fibh->sbh = fibh->ebh; |
561 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 562 | } else { |
1da177e4 | 563 | fi = (struct fileIdentDesc *) |
4b11111a MS |
564 | (fibh->sbh->b_data + sb->s_blocksize + |
565 | fibh->soffset); | |
1da177e4 LT |
566 | } |
567 | } | |
568 | ||
569 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 570 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a MS |
571 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
572 | sizeof(tag)); | |
1da177e4 | 573 | else |
4b11111a MS |
574 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
575 | sizeof(tag)); | |
1da177e4 LT |
576 | cfi->fileVersionNum = cpu_to_le16(1); |
577 | cfi->lengthFileIdent = namelen; | |
578 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 579 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
3bf25cb4 | 580 | brelse(epos.bh); |
1da177e4 LT |
581 | dir->i_size += nfidlen; |
582 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
583 | UDF_I_LENALLOC(dir) += nfidlen; | |
584 | mark_inode_dirty(dir); | |
585 | return fi; | |
cb00ea35 | 586 | } else { |
3bf25cb4 | 587 | brelse(epos.bh); |
1da177e4 | 588 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
589 | brelse(fibh->ebh); |
590 | brelse(fibh->sbh); | |
1da177e4 LT |
591 | *err = -EIO; |
592 | return NULL; | |
593 | } | |
594 | } | |
595 | ||
596 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
597 | struct udf_fileident_bh *fibh, |
598 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
599 | { |
600 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 601 | |
1da177e4 LT |
602 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
603 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 604 | |
1da177e4 LT |
605 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
606 | } | |
607 | ||
cb00ea35 CG |
608 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
609 | struct nameidata *nd) | |
1da177e4 LT |
610 | { |
611 | struct udf_fileident_bh fibh; | |
612 | struct inode *inode; | |
613 | struct fileIdentDesc cfi, *fi; | |
614 | int err; | |
615 | ||
616 | lock_kernel(); | |
617 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 618 | if (!inode) { |
1da177e4 LT |
619 | unlock_kernel(); |
620 | return err; | |
621 | } | |
622 | ||
623 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
624 | inode->i_data.a_ops = &udf_adinicb_aops; | |
625 | else | |
626 | inode->i_data.a_ops = &udf_aops; | |
627 | inode->i_op = &udf_file_inode_operations; | |
628 | inode->i_fop = &udf_file_operations; | |
629 | inode->i_mode = mode; | |
630 | mark_inode_dirty(inode); | |
631 | ||
4b11111a MS |
632 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
633 | if (!fi) { | |
cb00ea35 | 634 | inode->i_nlink--; |
1da177e4 LT |
635 | mark_inode_dirty(inode); |
636 | iput(inode); | |
637 | unlock_kernel(); | |
638 | return err; | |
639 | } | |
640 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
641 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
28de7948 CG |
642 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
643 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 | 644 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
4b11111a | 645 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 646 | mark_inode_dirty(dir); |
1da177e4 | 647 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
648 | brelse(fibh.ebh); |
649 | brelse(fibh.sbh); | |
1da177e4 LT |
650 | unlock_kernel(); |
651 | d_instantiate(dentry, inode); | |
28de7948 | 652 | |
1da177e4 LT |
653 | return 0; |
654 | } | |
655 | ||
cb00ea35 CG |
656 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
657 | dev_t rdev) | |
1da177e4 | 658 | { |
cb00ea35 | 659 | struct inode *inode; |
1da177e4 LT |
660 | struct udf_fileident_bh fibh; |
661 | struct fileIdentDesc cfi, *fi; | |
662 | int err; | |
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 | ||
673 | inode->i_uid = current->fsuid; | |
674 | init_special_inode(inode, mode, rdev); | |
4b11111a MS |
675 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
676 | if (!fi) { | |
cb00ea35 | 677 | inode->i_nlink--; |
1da177e4 LT |
678 | mark_inode_dirty(inode); |
679 | iput(inode); | |
680 | unlock_kernel(); | |
681 | return err; | |
682 | } | |
683 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
684 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
28de7948 CG |
685 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
686 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 | 687 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
4b11111a | 688 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 689 | mark_inode_dirty(dir); |
1da177e4 LT |
690 | mark_inode_dirty(inode); |
691 | ||
692 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
693 | brelse(fibh.ebh); |
694 | brelse(fibh.sbh); | |
1da177e4 LT |
695 | d_instantiate(dentry, inode); |
696 | err = 0; | |
28de7948 CG |
697 | |
698 | out: | |
1da177e4 LT |
699 | unlock_kernel(); |
700 | return err; | |
701 | } | |
702 | ||
cb00ea35 | 703 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 704 | { |
cb00ea35 | 705 | struct inode *inode; |
1da177e4 LT |
706 | struct udf_fileident_bh fibh; |
707 | struct fileIdentDesc cfi, *fi; | |
708 | int err; | |
709 | ||
710 | lock_kernel(); | |
711 | err = -EMLINK; | |
cb00ea35 | 712 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
713 | goto out; |
714 | ||
715 | err = -EIO; | |
716 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
717 | if (!inode) | |
718 | goto out; | |
719 | ||
720 | inode->i_op = &udf_dir_inode_operations; | |
721 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
722 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
723 | if (!fi) { | |
1da177e4 LT |
724 | inode->i_nlink--; |
725 | mark_inode_dirty(inode); | |
726 | iput(inode); | |
727 | goto out; | |
728 | } | |
729 | inode->i_nlink = 2; | |
730 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
731 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir)); | |
28de7948 CG |
732 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
733 | cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL); | |
4b11111a MS |
734 | cfi.fileCharacteristics = |
735 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 736 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 737 | brelse(fibh.sbh); |
1da177e4 LT |
738 | inode->i_mode = S_IFDIR | mode; |
739 | if (dir->i_mode & S_ISGID) | |
740 | inode->i_mode |= S_ISGID; | |
741 | mark_inode_dirty(inode); | |
742 | ||
4b11111a MS |
743 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
744 | if (!fi) { | |
1da177e4 LT |
745 | inode->i_nlink = 0; |
746 | mark_inode_dirty(inode); | |
747 | iput(inode); | |
748 | goto out; | |
749 | } | |
750 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
751 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
28de7948 CG |
752 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
753 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
754 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
755 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 756 | inc_nlink(dir); |
1da177e4 LT |
757 | mark_inode_dirty(dir); |
758 | d_instantiate(dentry, inode); | |
759 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
760 | brelse(fibh.ebh); |
761 | brelse(fibh.sbh); | |
1da177e4 | 762 | err = 0; |
28de7948 CG |
763 | |
764 | out: | |
1da177e4 LT |
765 | unlock_kernel(); |
766 | return err; | |
767 | } | |
768 | ||
769 | static int empty_dir(struct inode *dir) | |
770 | { | |
771 | struct fileIdentDesc *fi, cfi; | |
772 | struct udf_fileident_bh fibh; | |
773 | loff_t f_pos; | |
774 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
775 | int block; | |
ff116fc8 JK |
776 | kernel_lb_addr eloc; |
777 | uint32_t elen; | |
60448b1d | 778 | sector_t offset; |
28de7948 | 779 | struct extent_position epos = {}; |
1da177e4 LT |
780 | |
781 | f_pos = (udf_ext0_offset(dir) >> 2); | |
782 | ||
4b11111a MS |
783 | fibh.soffset = fibh.eoffset = |
784 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
1da177e4 | 785 | |
4b11111a | 786 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 787 | fibh.sbh = fibh.ebh = NULL; |
4b11111a MS |
788 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
789 | &epos, &eloc, &elen, &offset) == | |
790 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 791 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 792 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 793 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 794 | epos.offset -= sizeof(short_ad); |
1da177e4 | 795 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 796 | epos.offset -= sizeof(long_ad); |
4b11111a | 797 | } else |
1da177e4 LT |
798 | offset = 0; |
799 | ||
4b11111a MS |
800 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
801 | if (!fibh.sbh) { | |
3bf25cb4 | 802 | brelse(epos.bh); |
1da177e4 LT |
803 | return 0; |
804 | } | |
cb00ea35 | 805 | } else { |
3bf25cb4 | 806 | brelse(epos.bh); |
1da177e4 LT |
807 | return 0; |
808 | } | |
809 | ||
cb00ea35 CG |
810 | while ((f_pos < size)) { |
811 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, | |
812 | &elen, &offset); | |
cb00ea35 | 813 | if (!fi) { |
1da177e4 | 814 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
815 | brelse(fibh.ebh); |
816 | brelse(fibh.sbh); | |
817 | brelse(epos.bh); | |
1da177e4 LT |
818 | return 0; |
819 | } | |
820 | ||
28de7948 CG |
821 | if (cfi.lengthFileIdent && |
822 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 823 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
824 | brelse(fibh.ebh); |
825 | brelse(fibh.sbh); | |
826 | brelse(epos.bh); | |
1da177e4 LT |
827 | return 0; |
828 | } | |
829 | } | |
28de7948 | 830 | |
1da177e4 | 831 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
832 | brelse(fibh.ebh); |
833 | brelse(fibh.sbh); | |
834 | brelse(epos.bh); | |
28de7948 | 835 | |
1da177e4 LT |
836 | return 1; |
837 | } | |
838 | ||
cb00ea35 | 839 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
840 | { |
841 | int retval; | |
cb00ea35 | 842 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
843 | struct udf_fileident_bh fibh; |
844 | struct fileIdentDesc *fi, cfi; | |
845 | kernel_lb_addr tloc; | |
846 | ||
847 | retval = -ENOENT; | |
848 | lock_kernel(); | |
849 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
850 | if (!fi) | |
851 | goto out; | |
852 | ||
853 | retval = -EIO; | |
854 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
855 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
856 | goto end_rmdir; | |
857 | retval = -ENOTEMPTY; | |
858 | if (!empty_dir(inode)) | |
859 | goto end_rmdir; | |
860 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
861 | if (retval) | |
862 | goto end_rmdir; | |
863 | if (inode->i_nlink != 2) | |
864 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
865 | "empty directory has nlink != 2 (%d)", |
866 | inode->i_nlink); | |
ce71ec36 | 867 | clear_nlink(inode); |
1da177e4 | 868 | inode->i_size = 0; |
c007c06e | 869 | inode_dec_link_count(dir); |
4b11111a MS |
870 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
871 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
872 | mark_inode_dirty(dir); |
873 | ||
28de7948 | 874 | end_rmdir: |
1da177e4 | 875 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
876 | brelse(fibh.ebh); |
877 | brelse(fibh.sbh); | |
28de7948 CG |
878 | |
879 | out: | |
1da177e4 LT |
880 | unlock_kernel(); |
881 | return retval; | |
882 | } | |
883 | ||
cb00ea35 | 884 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
885 | { |
886 | int retval; | |
cb00ea35 | 887 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
888 | struct udf_fileident_bh fibh; |
889 | struct fileIdentDesc *fi; | |
890 | struct fileIdentDesc cfi; | |
891 | kernel_lb_addr tloc; | |
892 | ||
893 | retval = -ENOENT; | |
894 | lock_kernel(); | |
895 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
896 | if (!fi) | |
897 | goto out; | |
898 | ||
899 | retval = -EIO; | |
900 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
901 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
902 | goto end_unlink; | |
903 | ||
cb00ea35 | 904 | if (!inode->i_nlink) { |
1da177e4 | 905 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 906 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
907 | inode->i_nlink = 1; |
908 | } | |
909 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
910 | if (retval) | |
911 | goto end_unlink; | |
912 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
913 | mark_inode_dirty(dir); | |
9a53c3a7 | 914 | inode_dec_link_count(inode); |
1da177e4 LT |
915 | inode->i_ctime = dir->i_ctime; |
916 | retval = 0; | |
917 | ||
28de7948 | 918 | end_unlink: |
1da177e4 | 919 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
920 | brelse(fibh.ebh); |
921 | brelse(fibh.sbh); | |
28de7948 CG |
922 | |
923 | out: | |
1da177e4 LT |
924 | unlock_kernel(); |
925 | return retval; | |
926 | } | |
927 | ||
cb00ea35 CG |
928 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
929 | const char *symname) | |
1da177e4 | 930 | { |
cb00ea35 | 931 | struct inode *inode; |
1da177e4 LT |
932 | struct pathComponent *pc; |
933 | char *compstart; | |
934 | struct udf_fileident_bh fibh; | |
28de7948 | 935 | struct extent_position epos = {}; |
1da177e4 LT |
936 | int eoffset, elen = 0; |
937 | struct fileIdentDesc *fi; | |
938 | struct fileIdentDesc cfi; | |
939 | char *ea; | |
940 | int err; | |
941 | int block; | |
942 | char name[UDF_NAME_LEN]; | |
943 | int namelen; | |
6c79e987 | 944 | struct buffer_head *bh; |
1da177e4 LT |
945 | |
946 | lock_kernel(); | |
4b11111a MS |
947 | inode = udf_new_inode(dir, S_IFLNK, &err); |
948 | if (!inode) | |
1da177e4 LT |
949 | goto out; |
950 | ||
951 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
952 | inode->i_data.a_ops = &udf_symlink_aops; | |
953 | inode->i_op = &page_symlink_inode_operations; | |
954 | ||
cb00ea35 | 955 | if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 JK |
956 | kernel_lb_addr eloc; |
957 | uint32_t elen; | |
1da177e4 LT |
958 | |
959 | block = udf_new_block(inode->i_sb, inode, | |
4b11111a MS |
960 | UDF_I_LOCATION(inode).partitionReferenceNum, |
961 | UDF_I_LOCATION(inode).logicalBlockNum, &err); | |
1da177e4 LT |
962 | if (!block) |
963 | goto out_no_entry; | |
ff116fc8 JK |
964 | epos.block = UDF_I_LOCATION(inode); |
965 | epos.offset = udf_file_entry_alloc_offset(inode); | |
966 | epos.bh = NULL; | |
1da177e4 | 967 | eloc.logicalBlockNum = block; |
4b11111a MS |
968 | eloc.partitionReferenceNum = |
969 | UDF_I_LOCATION(inode).partitionReferenceNum; | |
1da177e4 LT |
970 | elen = inode->i_sb->s_blocksize; |
971 | UDF_I_LENEXTENTS(inode) = elen; | |
ff116fc8 | 972 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 973 | brelse(epos.bh); |
1da177e4 LT |
974 | |
975 | block = udf_get_pblock(inode->i_sb, block, | |
4b11111a MS |
976 | UDF_I_LOCATION(inode).partitionReferenceNum, |
977 | 0); | |
ff116fc8 JK |
978 | epos.bh = udf_tread(inode->i_sb, block); |
979 | lock_buffer(epos.bh); | |
980 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
981 | set_buffer_uptodate(epos.bh); | |
982 | unlock_buffer(epos.bh); | |
983 | mark_buffer_dirty_inode(epos.bh, inode); | |
984 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
28de7948 | 985 | } else { |
1da177e4 | 986 | ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode); |
28de7948 | 987 | } |
1da177e4 LT |
988 | |
989 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
990 | pc = (struct pathComponent *)ea; | |
991 | ||
cb00ea35 CG |
992 | if (*symname == '/') { |
993 | do { | |
1da177e4 LT |
994 | symname++; |
995 | } while (*symname == '/'); | |
996 | ||
997 | pc->componentType = 1; | |
998 | pc->lengthComponentIdent = 0; | |
999 | pc->componentFileVersionNum = 0; | |
1000 | pc += sizeof(struct pathComponent); | |
1001 | elen += sizeof(struct pathComponent); | |
1002 | } | |
1003 | ||
1004 | err = -ENAMETOOLONG; | |
1005 | ||
cb00ea35 | 1006 | while (*symname) { |
1da177e4 LT |
1007 | if (elen + sizeof(struct pathComponent) > eoffset) |
1008 | goto out_no_entry; | |
1009 | ||
1010 | pc = (struct pathComponent *)(ea + elen); | |
1011 | ||
1012 | compstart = (char *)symname; | |
1013 | ||
cb00ea35 | 1014 | do { |
1da177e4 LT |
1015 | symname++; |
1016 | } while (*symname && *symname != '/'); | |
1017 | ||
1018 | pc->componentType = 5; | |
1019 | pc->lengthComponentIdent = 0; | |
1020 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
1021 | if (compstart[0] == '.') { |
1022 | if ((symname - compstart) == 1) | |
1da177e4 | 1023 | pc->componentType = 4; |
4b11111a MS |
1024 | else if ((symname - compstart) == 2 && |
1025 | compstart[1] == '.') | |
1da177e4 LT |
1026 | pc->componentType = 3; |
1027 | } | |
1028 | ||
cb00ea35 | 1029 | if (pc->componentType == 5) { |
28de7948 CG |
1030 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
1031 | symname - compstart); | |
1032 | if (!namelen) | |
1da177e4 LT |
1033 | goto out_no_entry; |
1034 | ||
4b11111a MS |
1035 | if (elen + sizeof(struct pathComponent) + namelen > |
1036 | eoffset) | |
1da177e4 LT |
1037 | goto out_no_entry; |
1038 | else | |
1039 | pc->lengthComponentIdent = namelen; | |
1040 | ||
1041 | memcpy(pc->componentIdent, name, namelen); | |
1042 | } | |
1043 | ||
1044 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1045 | ||
cb00ea35 CG |
1046 | if (*symname) { |
1047 | do { | |
1da177e4 LT |
1048 | symname++; |
1049 | } while (*symname == '/'); | |
1050 | } | |
1051 | } | |
1052 | ||
3bf25cb4 | 1053 | brelse(epos.bh); |
1da177e4 LT |
1054 | inode->i_size = elen; |
1055 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
1056 | UDF_I_LENALLOC(inode) = inode->i_size; | |
1057 | mark_inode_dirty(inode); | |
1058 | ||
4b11111a MS |
1059 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1060 | if (!fi) | |
1da177e4 LT |
1061 | goto out_no_entry; |
1062 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
1063 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
6c79e987 MS |
1064 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1065 | if (bh) { | |
4b11111a MS |
1066 | struct logicalVolIntegrityDesc *lvid = |
1067 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1068 | struct logicalVolHeaderDesc *lvhd; |
1069 | uint64_t uniqueID; | |
4b11111a MS |
1070 | lvhd = (struct logicalVolHeaderDesc *) |
1071 | lvid->logicalVolContentsUse; | |
1da177e4 | 1072 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1073 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1074 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1075 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1076 | uniqueID += 16; | |
1077 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1078 | mark_buffer_dirty(bh); |
1da177e4 LT |
1079 | } |
1080 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
4b11111a | 1081 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1082 | mark_inode_dirty(dir); |
1da177e4 | 1083 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1084 | brelse(fibh.ebh); |
1085 | brelse(fibh.sbh); | |
1da177e4 LT |
1086 | d_instantiate(dentry, inode); |
1087 | err = 0; | |
1088 | ||
28de7948 | 1089 | out: |
1da177e4 LT |
1090 | unlock_kernel(); |
1091 | return err; | |
1092 | ||
28de7948 | 1093 | out_no_entry: |
9a53c3a7 | 1094 | inode_dec_link_count(inode); |
1da177e4 LT |
1095 | iput(inode); |
1096 | goto out; | |
1097 | } | |
1098 | ||
cb00ea35 CG |
1099 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1100 | struct dentry *dentry) | |
1da177e4 LT |
1101 | { |
1102 | struct inode *inode = old_dentry->d_inode; | |
1103 | struct udf_fileident_bh fibh; | |
1104 | struct fileIdentDesc cfi, *fi; | |
1105 | int err; | |
6c79e987 | 1106 | struct buffer_head *bh; |
1da177e4 LT |
1107 | |
1108 | lock_kernel(); | |
cb00ea35 | 1109 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1110 | unlock_kernel(); |
1111 | return -EMLINK; | |
1112 | } | |
1113 | ||
4b11111a MS |
1114 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1115 | if (!fi) { | |
1da177e4 LT |
1116 | unlock_kernel(); |
1117 | return err; | |
1118 | } | |
1119 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
1120 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
6c79e987 MS |
1121 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1122 | if (bh) { | |
4b11111a MS |
1123 | struct logicalVolIntegrityDesc *lvid = |
1124 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1125 | struct logicalVolHeaderDesc *lvhd; |
1126 | uint64_t uniqueID; | |
4b11111a MS |
1127 | lvhd = (struct logicalVolHeaderDesc *) |
1128 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1129 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1130 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1131 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1132 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1133 | uniqueID += 16; | |
1134 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1135 | mark_buffer_dirty(bh); |
1da177e4 LT |
1136 | } |
1137 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
4b11111a | 1138 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1139 | mark_inode_dirty(dir); |
28de7948 | 1140 | |
1da177e4 | 1141 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1142 | brelse(fibh.ebh); |
1143 | brelse(fibh.sbh); | |
d8c76e6f | 1144 | inc_nlink(inode); |
1da177e4 LT |
1145 | inode->i_ctime = current_fs_time(inode->i_sb); |
1146 | mark_inode_dirty(inode); | |
1147 | atomic_inc(&inode->i_count); | |
1148 | d_instantiate(dentry, inode); | |
1149 | unlock_kernel(); | |
28de7948 | 1150 | |
1da177e4 LT |
1151 | return 0; |
1152 | } | |
1153 | ||
1154 | /* Anybody can rename anything with this: the permission checks are left to the | |
1155 | * higher-level routines. | |
1156 | */ | |
cb00ea35 CG |
1157 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1158 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1159 | { |
cb00ea35 CG |
1160 | struct inode *old_inode = old_dentry->d_inode; |
1161 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1162 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1163 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1164 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1165 | struct buffer_head *dir_bh = NULL; |
1166 | int retval = -ENOENT; | |
1167 | kernel_lb_addr tloc; | |
1168 | ||
1169 | lock_kernel(); | |
4b11111a MS |
1170 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); |
1171 | if (ofi) { | |
1da177e4 | 1172 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1173 | brelse(ofibh.ebh); |
1174 | brelse(ofibh.sbh); | |
1da177e4 LT |
1175 | } |
1176 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1177 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1178 | != old_inode->i_ino) |
1da177e4 LT |
1179 | goto end_rename; |
1180 | ||
1181 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1182 | if (nfi) { |
1183 | if (!new_inode) { | |
1da177e4 | 1184 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1185 | brelse(nfibh.ebh); |
1186 | brelse(nfibh.sbh); | |
1da177e4 LT |
1187 | nfi = NULL; |
1188 | } | |
1189 | } | |
cb00ea35 | 1190 | if (S_ISDIR(old_inode->i_mode)) { |
1da177e4 LT |
1191 | uint32_t offset = udf_ext0_offset(old_inode); |
1192 | ||
cb00ea35 | 1193 | if (new_inode) { |
1da177e4 LT |
1194 | retval = -ENOTEMPTY; |
1195 | if (!empty_dir(new_inode)) | |
1196 | goto end_rename; | |
1197 | } | |
1198 | retval = -EIO; | |
cb00ea35 | 1199 | if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a MS |
1200 | dir_fi = udf_get_fileident( |
1201 | UDF_I_DATA(old_inode) - | |
1202 | (UDF_I_EFE(old_inode) ? | |
1203 | sizeof(struct extendedFileEntry) : | |
1204 | sizeof(struct fileEntry)), | |
1205 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1206 | } else { |
1da177e4 LT |
1207 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1208 | if (!dir_bh) | |
1209 | goto end_rename; | |
4b11111a MS |
1210 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1211 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1212 | } |
1213 | if (!dir_fi) | |
1214 | goto end_rename; | |
1215 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
4b11111a MS |
1216 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != |
1217 | old_dir->i_ino) | |
1da177e4 LT |
1218 | goto end_rename; |
1219 | ||
1220 | retval = -EMLINK; | |
4b11111a MS |
1221 | if (!new_inode && |
1222 | new_dir->i_nlink >= | |
1223 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1224 | goto end_rename; |
1225 | } | |
cb00ea35 | 1226 | if (!nfi) { |
4b11111a MS |
1227 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1228 | &retval); | |
1da177e4 LT |
1229 | if (!nfi) |
1230 | goto end_rename; | |
1231 | } | |
1232 | ||
1233 | /* | |
1234 | * Like most other Unix systems, set the ctime for inodes on a | |
1235 | * rename. | |
1236 | */ | |
1237 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1238 | mark_inode_dirty(old_inode); | |
1239 | ||
1240 | /* | |
1241 | * ok, that's it | |
1242 | */ | |
1243 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1244 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1245 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1246 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1247 | ||
1248 | /* The old fid may have moved - find it again */ | |
1249 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1250 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1251 | ||
cb00ea35 | 1252 | if (new_inode) { |
1da177e4 | 1253 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1254 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1255 | } |
1256 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1257 | mark_inode_dirty(old_dir); | |
1258 | ||
cb00ea35 | 1259 | if (dir_fi) { |
1da177e4 | 1260 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir)); |
4b11111a MS |
1261 | udf_update_tag((char *)dir_fi, |
1262 | (sizeof(struct fileIdentDesc) + | |
1263 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
1264 | if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 | 1265 | mark_inode_dirty(old_inode); |
4b11111a | 1266 | else |
1da177e4 | 1267 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1268 | |
9a53c3a7 | 1269 | inode_dec_link_count(old_dir); |
4b11111a | 1270 | if (new_inode) |
9a53c3a7 | 1271 | inode_dec_link_count(new_inode); |
4b11111a | 1272 | else { |
d8c76e6f | 1273 | inc_nlink(new_dir); |
1da177e4 LT |
1274 | mark_inode_dirty(new_dir); |
1275 | } | |
1276 | } | |
1277 | ||
cb00ea35 | 1278 | if (ofi) { |
1da177e4 | 1279 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1280 | brelse(ofibh.ebh); |
1281 | brelse(ofibh.sbh); | |
1da177e4 LT |
1282 | } |
1283 | ||
1284 | retval = 0; | |
1285 | ||
28de7948 | 1286 | end_rename: |
3bf25cb4 | 1287 | brelse(dir_bh); |
cb00ea35 | 1288 | if (nfi) { |
1da177e4 | 1289 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1290 | brelse(nfibh.ebh); |
1291 | brelse(nfibh.sbh); | |
1da177e4 LT |
1292 | } |
1293 | unlock_kernel(); | |
28de7948 | 1294 | |
1da177e4 LT |
1295 | return retval; |
1296 | } | |
1297 | ||
c5ef1c42 | 1298 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1299 | .lookup = udf_lookup, |
1300 | .create = udf_create, | |
1301 | .link = udf_link, | |
1302 | .unlink = udf_unlink, | |
1303 | .symlink = udf_symlink, | |
1304 | .mkdir = udf_mkdir, | |
1305 | .rmdir = udf_rmdir, | |
1306 | .mknod = udf_mknod, | |
1307 | .rename = udf_rename, | |
1da177e4 | 1308 | }; |