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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * namei.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998-2004 Ben Fennema | |
14 | * (C) 1999-2000 Stelias Computing Inc | |
15 | * | |
16 | * HISTORY | |
17 | * | |
18 | * 12/12/98 blf Created. Split out the lookup code from dir.c | |
19 | * 04/19/99 blf link, mknod, symlink support | |
20 | */ | |
21 | ||
22 | #include "udfdecl.h" | |
23 | ||
24 | #include "udf_i.h" | |
25 | #include "udf_sb.h" | |
26 | #include <linux/string.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/quotaops.h> | |
31 | #include <linux/smp_lock.h> | |
32 | #include <linux/buffer_head.h> | |
e8edc6e0 | 33 | #include <linux/sched.h> |
1da177e4 | 34 | |
cb00ea35 CG |
35 | static inline int udf_match(int len1, const char *name1, int len2, |
36 | const char *name2) | |
1da177e4 LT |
37 | { |
38 | if (len1 != len2) | |
39 | return 0; | |
28de7948 | 40 | |
1da177e4 LT |
41 | return !memcmp(name1, name2, len1); |
42 | } | |
43 | ||
44 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 | 45 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
4b11111a | 46 | uint8_t *impuse, uint8_t *fileident) |
1da177e4 LT |
47 | { |
48 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag); | |
49 | uint16_t crc; | |
1da177e4 LT |
50 | int offset; |
51 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
52 | uint8_t lfi = cfi->lengthFileIdent; | |
53 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
28de7948 | 54 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
55 | int adinicb = 0; |
56 | ||
c0b34438 | 57 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 LT |
58 | adinicb = 1; |
59 | ||
60 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
61 | ||
cb00ea35 | 62 | if (impuse) { |
28de7948 CG |
63 | if (adinicb || (offset + liu < 0)) { |
64 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
65 | } else if (offset >= 0) { | |
1da177e4 | 66 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
28de7948 CG |
67 | } else { |
68 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
4b11111a MS |
69 | memcpy(fibh->ebh->b_data, impuse - offset, |
70 | liu + offset); | |
1da177e4 LT |
71 | } |
72 | } | |
73 | ||
74 | offset += liu; | |
75 | ||
cb00ea35 | 76 | if (fileident) { |
28de7948 CG |
77 | if (adinicb || (offset + lfi < 0)) { |
78 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
79 | } else if (offset >= 0) { | |
1da177e4 | 80 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 81 | } else { |
4b11111a MS |
82 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
83 | -offset); | |
84 | memcpy(fibh->ebh->b_data, fileident - offset, | |
85 | lfi + offset); | |
1da177e4 LT |
86 | } |
87 | } | |
88 | ||
89 | offset += lfi; | |
90 | ||
28de7948 CG |
91 | if (adinicb || (offset + padlen < 0)) { |
92 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
93 | } else if (offset >= 0) { | |
1da177e4 | 94 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
95 | } else { |
96 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
97 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
98 | } | |
99 | ||
28de7948 CG |
100 | crc = udf_crc((uint8_t *)cfi + sizeof(tag), |
101 | sizeof(struct fileIdentDesc) - sizeof(tag), 0); | |
102 | ||
103 | if (fibh->sbh == fibh->ebh) { | |
104 | crc = udf_crc((uint8_t *)sfi->impUse, | |
4b11111a MS |
105 | crclen + sizeof(tag) - |
106 | sizeof(struct fileIdentDesc), crc); | |
28de7948 | 107 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
4b11111a MS |
108 | crc = udf_crc(fibh->ebh->b_data + |
109 | sizeof(struct fileIdentDesc) + | |
110 | fibh->soffset, | |
111 | crclen + sizeof(tag) - | |
112 | sizeof(struct fileIdentDesc), | |
113 | crc); | |
28de7948 CG |
114 | } else { |
115 | crc = udf_crc((uint8_t *)sfi->impUse, | |
4b11111a MS |
116 | -fibh->soffset - sizeof(struct fileIdentDesc), |
117 | crc); | |
1da177e4 LT |
118 | crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc); |
119 | } | |
120 | ||
121 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
122 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
3f2587bb | 123 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
1da177e4 | 124 | |
28de7948 | 125 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
4b11111a MS |
126 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
127 | sizeof(struct fileIdentDesc)); | |
28de7948 CG |
128 | } else { |
129 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
130 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 131 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
132 | } |
133 | ||
28de7948 | 134 | if (adinicb) { |
1da177e4 | 135 | mark_inode_dirty(inode); |
28de7948 | 136 | } else { |
1da177e4 LT |
137 | if (fibh->sbh != fibh->ebh) |
138 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
139 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
140 | } | |
141 | return 0; | |
142 | } | |
143 | ||
cb00ea35 CG |
144 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
145 | struct dentry *dentry, | |
146 | struct udf_fileident_bh *fibh, | |
147 | struct fileIdentDesc *cfi) | |
1da177e4 | 148 | { |
cb00ea35 | 149 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
150 | loff_t f_pos; |
151 | int block, flen; | |
152 | char fname[UDF_NAME_LEN]; | |
153 | char *nameptr; | |
154 | uint8_t lfi; | |
155 | uint16_t liu; | |
ec471dc4 | 156 | loff_t size; |
ff116fc8 JK |
157 | kernel_lb_addr eloc; |
158 | uint32_t elen; | |
60448b1d | 159 | sector_t offset; |
28de7948 | 160 | struct extent_position epos = {}; |
48d6d8ff | 161 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 162 | |
af793295 JK |
163 | size = udf_ext0_offset(dir) + dir->i_size; |
164 | f_pos = udf_ext0_offset(dir); | |
1da177e4 | 165 | |
af793295 | 166 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 167 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 168 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 169 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
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) { |
48d6d8ff | 174 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 175 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 176 | else if (dinfo->i_alloc_type == 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 | ||
af793295 | 191 | while (f_pos < size) { |
cb00ea35 CG |
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; | |
af793295 | 344 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
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 = {}; |
48d6d8ff | 353 | struct udf_inode_info *dinfo; |
1da177e4 | 354 | |
cb00ea35 CG |
355 | if (dentry) { |
356 | if (!dentry->d_name.len) { | |
1da177e4 LT |
357 | *err = -EINVAL; |
358 | return NULL; | |
359 | } | |
4b11111a MS |
360 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
361 | dentry->d_name.len); | |
362 | if (!namelen) { | |
1da177e4 LT |
363 | *err = -ENAMETOOLONG; |
364 | return NULL; | |
365 | } | |
28de7948 | 366 | } else { |
1da177e4 | 367 | namelen = 0; |
28de7948 | 368 | } |
1da177e4 LT |
369 | |
370 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
371 | ||
af793295 | 372 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 373 | |
af793295 | 374 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff MS |
375 | dinfo = UDF_I(dir); |
376 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 | 377 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 378 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
379 | &epos, &eloc, &elen, &offset) == |
380 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 381 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 382 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 383 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 384 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 385 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 386 | epos.offset -= sizeof(long_ad); |
4b11111a | 387 | } else |
1da177e4 LT |
388 | offset = 0; |
389 | ||
4b11111a MS |
390 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
391 | if (!fibh->sbh) { | |
3bf25cb4 | 392 | brelse(epos.bh); |
1da177e4 LT |
393 | *err = -EIO; |
394 | return NULL; | |
395 | } | |
396 | ||
48d6d8ff | 397 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 | 398 | |
cb00ea35 | 399 | } else { |
48d6d8ff | 400 | block = udf_get_lb_pblock(dir->i_sb, dinfo->i_location, 0); |
1da177e4 LT |
401 | fibh->sbh = fibh->ebh = NULL; |
402 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
403 | goto add; | |
404 | } | |
405 | ||
af793295 | 406 | while (f_pos < size) { |
cb00ea35 CG |
407 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
408 | &elen, &offset); | |
1da177e4 | 409 | |
cb00ea35 | 410 | if (!fi) { |
1da177e4 | 411 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
412 | brelse(fibh->ebh); |
413 | brelse(fibh->sbh); | |
414 | brelse(epos.bh); | |
1da177e4 LT |
415 | *err = -EIO; |
416 | return NULL; | |
417 | } | |
418 | ||
419 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
420 | lfi = cfi->lengthFileIdent; | |
421 | ||
4b11111a | 422 | if (fibh->sbh == fibh->ebh) |
1da177e4 | 423 | nameptr = fi->fileIdent + liu; |
4b11111a | 424 | else { |
1da177e4 LT |
425 | int poffset; /* Unpaded ending offset */ |
426 | ||
4b11111a MS |
427 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
428 | liu + lfi; | |
1da177e4 | 429 | |
4b11111a MS |
430 | if (poffset >= lfi) |
431 | nameptr = (char *)(fibh->ebh->b_data + | |
432 | poffset - lfi); | |
433 | else { | |
1da177e4 | 434 | nameptr = fname; |
4b11111a MS |
435 | memcpy(nameptr, fi->fileIdent + liu, |
436 | lfi - poffset); | |
437 | memcpy(nameptr + lfi - poffset, | |
438 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
439 | } |
440 | } | |
441 | ||
cb00ea35 | 442 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
443 | if (((sizeof(struct fileIdentDesc) + |
444 | liu + lfi + 3) & ~3) == nfidlen) { | |
3bf25cb4 | 445 | brelse(epos.bh); |
1da177e4 LT |
446 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
447 | cfi->fileVersionNum = cpu_to_le16(1); | |
448 | cfi->fileCharacteristics = 0; | |
449 | cfi->lengthFileIdent = namelen; | |
450 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
451 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
452 | name)) | |
1da177e4 | 453 | return fi; |
4b11111a | 454 | else { |
1da177e4 LT |
455 | *err = -EIO; |
456 | return NULL; | |
457 | } | |
458 | } | |
459 | } | |
460 | ||
461 | if (!lfi || !dentry) | |
462 | continue; | |
463 | ||
4b11111a MS |
464 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
465 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
466 | dentry->d_name.name)) { | |
1da177e4 | 467 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
468 | brelse(fibh->ebh); |
469 | brelse(fibh->sbh); | |
470 | brelse(epos.bh); | |
1da177e4 LT |
471 | *err = -EEXIST; |
472 | return NULL; | |
473 | } | |
474 | } | |
475 | ||
28de7948 | 476 | add: |
1da177e4 LT |
477 | f_pos += nfidlen; |
478 | ||
48d6d8ff | 479 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 480 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 481 | brelse(epos.bh); |
ff116fc8 | 482 | epos.bh = NULL; |
1da177e4 LT |
483 | fibh->soffset -= udf_ext0_offset(dir); |
484 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 485 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 486 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
487 | brelse(fibh->ebh); |
488 | brelse(fibh->sbh); | |
4b11111a MS |
489 | fibh->sbh = fibh->ebh = |
490 | udf_expand_dir_adinicb(dir, &block, err); | |
491 | if (!fibh->sbh) | |
1da177e4 | 492 | return NULL; |
48d6d8ff | 493 | epos.block = dinfo->i_location; |
1da177e4 | 494 | eloc.logicalBlockNum = block; |
4b11111a | 495 | eloc.partitionReferenceNum = |
48d6d8ff | 496 | dinfo->i_location.partitionReferenceNum; |
1da177e4 | 497 | elen = dir->i_sb->s_blocksize; |
ff116fc8 | 498 | epos.offset = udf_file_entry_alloc_offset(dir); |
48d6d8ff | 499 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 500 | epos.offset += sizeof(short_ad); |
48d6d8ff | 501 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 502 | epos.offset += sizeof(long_ad); |
1da177e4 LT |
503 | } |
504 | ||
cb00ea35 | 505 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
506 | fibh->soffset = fibh->eoffset; |
507 | fibh->eoffset += nfidlen; | |
cb00ea35 | 508 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 509 | brelse(fibh->sbh); |
1da177e4 LT |
510 | fibh->sbh = fibh->ebh; |
511 | } | |
512 | ||
48d6d8ff MS |
513 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
514 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 515 | fi = (struct fileIdentDesc *) |
48d6d8ff | 516 | (dinfo->i_ext.i_data + |
c0b34438 | 517 | fibh->soffset - |
4b11111a | 518 | udf_ext0_offset(dir) + |
48d6d8ff | 519 | dinfo->i_lenEAttr); |
cb00ea35 | 520 | } else { |
4b11111a MS |
521 | block = eloc.logicalBlockNum + |
522 | ((elen - 1) >> | |
523 | dir->i_sb->s_blocksize_bits); | |
524 | fi = (struct fileIdentDesc *) | |
525 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 526 | } |
cb00ea35 | 527 | } else { |
1da177e4 LT |
528 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
529 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 530 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 531 | brelse(fibh->sbh); |
1da177e4 LT |
532 | fibh->sbh = fibh->ebh; |
533 | } | |
534 | ||
535 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 536 | dir->i_sb->s_blocksize_bits); |
4b11111a | 537 | fibh->ebh = udf_bread(dir, |
af793295 | 538 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
28de7948 | 539 | if (!fibh->ebh) { |
3bf25cb4 JK |
540 | brelse(epos.bh); |
541 | brelse(fibh->sbh); | |
1da177e4 LT |
542 | return NULL; |
543 | } | |
544 | ||
28de7948 | 545 | if (!fibh->soffset) { |
ff116fc8 | 546 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 547 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 548 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 | 549 | dir->i_sb->s_blocksize_bits); |
4b11111a | 550 | } else |
cb00ea35 | 551 | block++; |
1da177e4 | 552 | |
3bf25cb4 | 553 | brelse(fibh->sbh); |
1da177e4 LT |
554 | fibh->sbh = fibh->ebh; |
555 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 556 | } else { |
1da177e4 | 557 | fi = (struct fileIdentDesc *) |
4b11111a MS |
558 | (fibh->sbh->b_data + sb->s_blocksize + |
559 | fibh->soffset); | |
1da177e4 LT |
560 | } |
561 | } | |
562 | ||
563 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 564 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a MS |
565 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
566 | sizeof(tag)); | |
1da177e4 | 567 | else |
4b11111a MS |
568 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
569 | sizeof(tag)); | |
1da177e4 LT |
570 | cfi->fileVersionNum = cpu_to_le16(1); |
571 | cfi->lengthFileIdent = namelen; | |
572 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 573 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
3bf25cb4 | 574 | brelse(epos.bh); |
1da177e4 | 575 | dir->i_size += nfidlen; |
48d6d8ff MS |
576 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
577 | dinfo->i_lenAlloc += nfidlen; | |
1da177e4 LT |
578 | mark_inode_dirty(dir); |
579 | return fi; | |
cb00ea35 | 580 | } else { |
3bf25cb4 | 581 | brelse(epos.bh); |
1da177e4 | 582 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
583 | brelse(fibh->ebh); |
584 | brelse(fibh->sbh); | |
1da177e4 LT |
585 | *err = -EIO; |
586 | return NULL; | |
587 | } | |
588 | } | |
589 | ||
590 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
591 | struct udf_fileident_bh *fibh, |
592 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
593 | { |
594 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 595 | |
1da177e4 LT |
596 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
597 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 598 | |
1da177e4 LT |
599 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
600 | } | |
601 | ||
cb00ea35 CG |
602 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
603 | struct nameidata *nd) | |
1da177e4 LT |
604 | { |
605 | struct udf_fileident_bh fibh; | |
606 | struct inode *inode; | |
607 | struct fileIdentDesc cfi, *fi; | |
608 | int err; | |
48d6d8ff | 609 | struct udf_inode_info *iinfo; |
1da177e4 LT |
610 | |
611 | lock_kernel(); | |
612 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 613 | if (!inode) { |
1da177e4 LT |
614 | unlock_kernel(); |
615 | return err; | |
616 | } | |
617 | ||
48d6d8ff MS |
618 | iinfo = UDF_I(inode); |
619 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
620 | inode->i_data.a_ops = &udf_adinicb_aops; |
621 | else | |
622 | inode->i_data.a_ops = &udf_aops; | |
623 | inode->i_op = &udf_file_inode_operations; | |
624 | inode->i_fop = &udf_file_operations; | |
625 | inode->i_mode = mode; | |
626 | mark_inode_dirty(inode); | |
627 | ||
4b11111a MS |
628 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
629 | if (!fi) { | |
cb00ea35 | 630 | inode->i_nlink--; |
1da177e4 LT |
631 | mark_inode_dirty(inode); |
632 | iput(inode); | |
633 | unlock_kernel(); | |
634 | return err; | |
635 | } | |
636 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 637 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 638 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 639 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 640 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 641 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 642 | mark_inode_dirty(dir); |
1da177e4 | 643 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
644 | brelse(fibh.ebh); |
645 | brelse(fibh.sbh); | |
1da177e4 LT |
646 | unlock_kernel(); |
647 | d_instantiate(dentry, inode); | |
28de7948 | 648 | |
1da177e4 LT |
649 | return 0; |
650 | } | |
651 | ||
cb00ea35 CG |
652 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
653 | dev_t rdev) | |
1da177e4 | 654 | { |
cb00ea35 | 655 | struct inode *inode; |
1da177e4 LT |
656 | struct udf_fileident_bh fibh; |
657 | struct fileIdentDesc cfi, *fi; | |
658 | int err; | |
48d6d8ff | 659 | struct udf_inode_info *iinfo; |
1da177e4 LT |
660 | |
661 | if (!old_valid_dev(rdev)) | |
662 | return -EINVAL; | |
663 | ||
664 | lock_kernel(); | |
665 | err = -EIO; | |
666 | inode = udf_new_inode(dir, mode, &err); | |
667 | if (!inode) | |
668 | goto out; | |
669 | ||
48d6d8ff | 670 | iinfo = UDF_I(inode); |
1da177e4 LT |
671 | inode->i_uid = current->fsuid; |
672 | init_special_inode(inode, mode, rdev); | |
4b11111a MS |
673 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
674 | if (!fi) { | |
cb00ea35 | 675 | inode->i_nlink--; |
1da177e4 LT |
676 | mark_inode_dirty(inode); |
677 | iput(inode); | |
678 | unlock_kernel(); | |
679 | return err; | |
680 | } | |
681 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 682 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 683 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 684 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 685 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 686 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 687 | mark_inode_dirty(dir); |
1da177e4 LT |
688 | mark_inode_dirty(inode); |
689 | ||
690 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
691 | brelse(fibh.ebh); |
692 | brelse(fibh.sbh); | |
1da177e4 LT |
693 | d_instantiate(dentry, inode); |
694 | err = 0; | |
28de7948 CG |
695 | |
696 | out: | |
1da177e4 LT |
697 | unlock_kernel(); |
698 | return err; | |
699 | } | |
700 | ||
cb00ea35 | 701 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 702 | { |
cb00ea35 | 703 | struct inode *inode; |
1da177e4 LT |
704 | struct udf_fileident_bh fibh; |
705 | struct fileIdentDesc cfi, *fi; | |
706 | int err; | |
48d6d8ff MS |
707 | struct udf_inode_info *dinfo = UDF_I(dir); |
708 | struct udf_inode_info *iinfo; | |
1da177e4 LT |
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 | ||
48d6d8ff | 720 | iinfo = UDF_I(inode); |
1da177e4 LT |
721 | inode->i_op = &udf_dir_inode_operations; |
722 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
723 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
724 | if (!fi) { | |
1da177e4 LT |
725 | inode->i_nlink--; |
726 | mark_inode_dirty(inode); | |
727 | iput(inode); | |
728 | goto out; | |
729 | } | |
730 | inode->i_nlink = 2; | |
731 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 732 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 733 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 734 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
735 | cfi.fileCharacteristics = |
736 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 737 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 738 | brelse(fibh.sbh); |
1da177e4 LT |
739 | inode->i_mode = S_IFDIR | mode; |
740 | if (dir->i_mode & S_ISGID) | |
741 | inode->i_mode |= S_ISGID; | |
742 | mark_inode_dirty(inode); | |
743 | ||
4b11111a MS |
744 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
745 | if (!fi) { | |
1da177e4 LT |
746 | inode->i_nlink = 0; |
747 | mark_inode_dirty(inode); | |
748 | iput(inode); | |
749 | goto out; | |
750 | } | |
751 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 752 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 753 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 754 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
755 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
756 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 757 | inc_nlink(dir); |
1da177e4 LT |
758 | mark_inode_dirty(dir); |
759 | d_instantiate(dentry, inode); | |
760 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
761 | brelse(fibh.ebh); |
762 | brelse(fibh.sbh); | |
1da177e4 | 763 | err = 0; |
28de7948 CG |
764 | |
765 | out: | |
1da177e4 LT |
766 | unlock_kernel(); |
767 | return err; | |
768 | } | |
769 | ||
770 | static int empty_dir(struct inode *dir) | |
771 | { | |
772 | struct fileIdentDesc *fi, cfi; | |
773 | struct udf_fileident_bh fibh; | |
774 | loff_t f_pos; | |
af793295 | 775 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 776 | int block; |
ff116fc8 JK |
777 | kernel_lb_addr eloc; |
778 | uint32_t elen; | |
60448b1d | 779 | sector_t offset; |
28de7948 | 780 | struct extent_position epos = {}; |
48d6d8ff | 781 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 782 | |
af793295 JK |
783 | f_pos = udf_ext0_offset(dir); |
784 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 785 | |
48d6d8ff | 786 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 787 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 788 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
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) { |
48d6d8ff | 793 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 794 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 795 | else if (dinfo->i_alloc_type == 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 | ||
af793295 | 810 | while (f_pos < size) { |
cb00ea35 CG |
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; |
48d6d8ff | 945 | struct udf_inode_info *iinfo; |
1da177e4 LT |
946 | |
947 | lock_kernel(); | |
4b11111a MS |
948 | inode = udf_new_inode(dir, S_IFLNK, &err); |
949 | if (!inode) | |
1da177e4 LT |
950 | goto out; |
951 | ||
48d6d8ff | 952 | iinfo = UDF_I(inode); |
1da177e4 LT |
953 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
954 | inode->i_data.a_ops = &udf_symlink_aops; | |
955 | inode->i_op = &page_symlink_inode_operations; | |
956 | ||
48d6d8ff | 957 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 JK |
958 | kernel_lb_addr eloc; |
959 | uint32_t elen; | |
1da177e4 LT |
960 | |
961 | block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
962 | iinfo->i_location.partitionReferenceNum, |
963 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
964 | if (!block) |
965 | goto out_no_entry; | |
48d6d8ff | 966 | epos.block = iinfo->i_location; |
ff116fc8 JK |
967 | epos.offset = udf_file_entry_alloc_offset(inode); |
968 | epos.bh = NULL; | |
1da177e4 | 969 | eloc.logicalBlockNum = block; |
4b11111a | 970 | eloc.partitionReferenceNum = |
48d6d8ff | 971 | iinfo->i_location.partitionReferenceNum; |
1da177e4 | 972 | elen = inode->i_sb->s_blocksize; |
48d6d8ff | 973 | iinfo->i_lenExtents = elen; |
ff116fc8 | 974 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 975 | brelse(epos.bh); |
1da177e4 LT |
976 | |
977 | block = udf_get_pblock(inode->i_sb, block, | |
48d6d8ff | 978 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 979 | 0); |
ff116fc8 JK |
980 | epos.bh = udf_tread(inode->i_sb, block); |
981 | lock_buffer(epos.bh); | |
982 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
983 | set_buffer_uptodate(epos.bh); | |
984 | unlock_buffer(epos.bh); | |
985 | mark_buffer_dirty_inode(epos.bh, inode); | |
986 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
987 | } else |
988 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 LT |
989 | |
990 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
991 | pc = (struct pathComponent *)ea; | |
992 | ||
cb00ea35 CG |
993 | if (*symname == '/') { |
994 | do { | |
1da177e4 LT |
995 | symname++; |
996 | } while (*symname == '/'); | |
997 | ||
998 | pc->componentType = 1; | |
999 | pc->lengthComponentIdent = 0; | |
1000 | pc->componentFileVersionNum = 0; | |
1001 | pc += sizeof(struct pathComponent); | |
1002 | elen += sizeof(struct pathComponent); | |
1003 | } | |
1004 | ||
1005 | err = -ENAMETOOLONG; | |
1006 | ||
cb00ea35 | 1007 | while (*symname) { |
1da177e4 LT |
1008 | if (elen + sizeof(struct pathComponent) > eoffset) |
1009 | goto out_no_entry; | |
1010 | ||
1011 | pc = (struct pathComponent *)(ea + elen); | |
1012 | ||
1013 | compstart = (char *)symname; | |
1014 | ||
cb00ea35 | 1015 | do { |
1da177e4 LT |
1016 | symname++; |
1017 | } while (*symname && *symname != '/'); | |
1018 | ||
1019 | pc->componentType = 5; | |
1020 | pc->lengthComponentIdent = 0; | |
1021 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
1022 | if (compstart[0] == '.') { |
1023 | if ((symname - compstart) == 1) | |
1da177e4 | 1024 | pc->componentType = 4; |
4b11111a MS |
1025 | else if ((symname - compstart) == 2 && |
1026 | compstart[1] == '.') | |
1da177e4 LT |
1027 | pc->componentType = 3; |
1028 | } | |
1029 | ||
cb00ea35 | 1030 | if (pc->componentType == 5) { |
28de7948 CG |
1031 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
1032 | symname - compstart); | |
1033 | if (!namelen) | |
1da177e4 LT |
1034 | goto out_no_entry; |
1035 | ||
4b11111a MS |
1036 | if (elen + sizeof(struct pathComponent) + namelen > |
1037 | eoffset) | |
1da177e4 LT |
1038 | goto out_no_entry; |
1039 | else | |
1040 | pc->lengthComponentIdent = namelen; | |
1041 | ||
1042 | memcpy(pc->componentIdent, name, namelen); | |
1043 | } | |
1044 | ||
1045 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1046 | ||
cb00ea35 CG |
1047 | if (*symname) { |
1048 | do { | |
1da177e4 LT |
1049 | symname++; |
1050 | } while (*symname == '/'); | |
1051 | } | |
1052 | } | |
1053 | ||
3bf25cb4 | 1054 | brelse(epos.bh); |
1da177e4 | 1055 | inode->i_size = elen; |
48d6d8ff MS |
1056 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1057 | iinfo->i_lenAlloc = inode->i_size; | |
1da177e4 LT |
1058 | mark_inode_dirty(inode); |
1059 | ||
4b11111a MS |
1060 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1061 | if (!fi) | |
1da177e4 LT |
1062 | goto out_no_entry; |
1063 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 1064 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
6c79e987 MS |
1065 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1066 | if (bh) { | |
4b11111a MS |
1067 | struct logicalVolIntegrityDesc *lvid = |
1068 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1069 | struct logicalVolHeaderDesc *lvhd; |
1070 | uint64_t uniqueID; | |
4b11111a MS |
1071 | lvhd = (struct logicalVolHeaderDesc *) |
1072 | lvid->logicalVolContentsUse; | |
1da177e4 | 1073 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1074 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1075 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1076 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1077 | uniqueID += 16; | |
1078 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1079 | mark_buffer_dirty(bh); |
1da177e4 LT |
1080 | } |
1081 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1082 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1083 | mark_inode_dirty(dir); |
1da177e4 | 1084 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1085 | brelse(fibh.ebh); |
1086 | brelse(fibh.sbh); | |
1da177e4 LT |
1087 | d_instantiate(dentry, inode); |
1088 | err = 0; | |
1089 | ||
28de7948 | 1090 | out: |
1da177e4 LT |
1091 | unlock_kernel(); |
1092 | return err; | |
1093 | ||
28de7948 | 1094 | out_no_entry: |
9a53c3a7 | 1095 | inode_dec_link_count(inode); |
1da177e4 LT |
1096 | iput(inode); |
1097 | goto out; | |
1098 | } | |
1099 | ||
cb00ea35 CG |
1100 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1101 | struct dentry *dentry) | |
1da177e4 LT |
1102 | { |
1103 | struct inode *inode = old_dentry->d_inode; | |
1104 | struct udf_fileident_bh fibh; | |
1105 | struct fileIdentDesc cfi, *fi; | |
1106 | int err; | |
6c79e987 | 1107 | struct buffer_head *bh; |
1da177e4 LT |
1108 | |
1109 | lock_kernel(); | |
cb00ea35 | 1110 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1111 | unlock_kernel(); |
1112 | return -EMLINK; | |
1113 | } | |
1114 | ||
4b11111a MS |
1115 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1116 | if (!fi) { | |
1da177e4 LT |
1117 | unlock_kernel(); |
1118 | return err; | |
1119 | } | |
1120 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1121 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1122 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1123 | if (bh) { | |
4b11111a MS |
1124 | struct logicalVolIntegrityDesc *lvid = |
1125 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1126 | struct logicalVolHeaderDesc *lvhd; |
1127 | uint64_t uniqueID; | |
4b11111a MS |
1128 | lvhd = (struct logicalVolHeaderDesc *) |
1129 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1130 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1131 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1132 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1133 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1134 | uniqueID += 16; | |
1135 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1136 | mark_buffer_dirty(bh); |
1da177e4 LT |
1137 | } |
1138 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1139 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1140 | mark_inode_dirty(dir); |
28de7948 | 1141 | |
1da177e4 | 1142 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1143 | brelse(fibh.ebh); |
1144 | brelse(fibh.sbh); | |
d8c76e6f | 1145 | inc_nlink(inode); |
1da177e4 LT |
1146 | inode->i_ctime = current_fs_time(inode->i_sb); |
1147 | mark_inode_dirty(inode); | |
1148 | atomic_inc(&inode->i_count); | |
1149 | d_instantiate(dentry, inode); | |
1150 | unlock_kernel(); | |
28de7948 | 1151 | |
1da177e4 LT |
1152 | return 0; |
1153 | } | |
1154 | ||
1155 | /* Anybody can rename anything with this: the permission checks are left to the | |
1156 | * higher-level routines. | |
1157 | */ | |
cb00ea35 CG |
1158 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1159 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1160 | { |
cb00ea35 CG |
1161 | struct inode *old_inode = old_dentry->d_inode; |
1162 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1163 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1164 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1165 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1166 | struct buffer_head *dir_bh = NULL; |
1167 | int retval = -ENOENT; | |
1168 | kernel_lb_addr tloc; | |
48d6d8ff | 1169 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 LT |
1170 | |
1171 | lock_kernel(); | |
4b11111a MS |
1172 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); |
1173 | if (ofi) { | |
1da177e4 | 1174 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1175 | brelse(ofibh.ebh); |
1176 | brelse(ofibh.sbh); | |
1da177e4 LT |
1177 | } |
1178 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1179 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1180 | != old_inode->i_ino) |
1da177e4 LT |
1181 | goto end_rename; |
1182 | ||
1183 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1184 | if (nfi) { |
1185 | if (!new_inode) { | |
1da177e4 | 1186 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1187 | brelse(nfibh.ebh); |
1188 | brelse(nfibh.sbh); | |
1da177e4 LT |
1189 | nfi = NULL; |
1190 | } | |
1191 | } | |
cb00ea35 | 1192 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1193 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1194 | |
cb00ea35 | 1195 | if (new_inode) { |
1da177e4 LT |
1196 | retval = -ENOTEMPTY; |
1197 | if (!empty_dir(new_inode)) | |
1198 | goto end_rename; | |
1199 | } | |
1200 | retval = -EIO; | |
48d6d8ff | 1201 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1202 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1203 | old_iinfo->i_ext.i_data - |
1204 | (old_iinfo->i_efe ? | |
4b11111a MS |
1205 | sizeof(struct extendedFileEntry) : |
1206 | sizeof(struct fileEntry)), | |
1207 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1208 | } else { |
1da177e4 LT |
1209 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1210 | if (!dir_bh) | |
1211 | goto end_rename; | |
4b11111a MS |
1212 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1213 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1214 | } |
1215 | if (!dir_fi) | |
1216 | goto end_rename; | |
1217 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
4b11111a MS |
1218 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != |
1219 | old_dir->i_ino) | |
1da177e4 LT |
1220 | goto end_rename; |
1221 | ||
1222 | retval = -EMLINK; | |
4b11111a MS |
1223 | if (!new_inode && |
1224 | new_dir->i_nlink >= | |
1225 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1226 | goto end_rename; |
1227 | } | |
cb00ea35 | 1228 | if (!nfi) { |
4b11111a MS |
1229 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1230 | &retval); | |
1da177e4 LT |
1231 | if (!nfi) |
1232 | goto end_rename; | |
1233 | } | |
1234 | ||
1235 | /* | |
1236 | * Like most other Unix systems, set the ctime for inodes on a | |
1237 | * rename. | |
1238 | */ | |
1239 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1240 | mark_inode_dirty(old_inode); | |
1241 | ||
1242 | /* | |
1243 | * ok, that's it | |
1244 | */ | |
1245 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1246 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1247 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1248 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1249 | ||
1250 | /* The old fid may have moved - find it again */ | |
1251 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1252 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1253 | ||
cb00ea35 | 1254 | if (new_inode) { |
1da177e4 | 1255 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1256 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1257 | } |
1258 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1259 | mark_inode_dirty(old_dir); | |
1260 | ||
cb00ea35 | 1261 | if (dir_fi) { |
c0b34438 | 1262 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1263 | udf_update_tag((char *)dir_fi, |
1264 | (sizeof(struct fileIdentDesc) + | |
1265 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1266 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1267 | mark_inode_dirty(old_inode); |
4b11111a | 1268 | else |
1da177e4 | 1269 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1270 | |
9a53c3a7 | 1271 | inode_dec_link_count(old_dir); |
4b11111a | 1272 | if (new_inode) |
9a53c3a7 | 1273 | inode_dec_link_count(new_inode); |
4b11111a | 1274 | else { |
d8c76e6f | 1275 | inc_nlink(new_dir); |
1da177e4 LT |
1276 | mark_inode_dirty(new_dir); |
1277 | } | |
1278 | } | |
1279 | ||
cb00ea35 | 1280 | if (ofi) { |
1da177e4 | 1281 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1282 | brelse(ofibh.ebh); |
1283 | brelse(ofibh.sbh); | |
1da177e4 LT |
1284 | } |
1285 | ||
1286 | retval = 0; | |
1287 | ||
28de7948 | 1288 | end_rename: |
3bf25cb4 | 1289 | brelse(dir_bh); |
cb00ea35 | 1290 | if (nfi) { |
1da177e4 | 1291 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1292 | brelse(nfibh.ebh); |
1293 | brelse(nfibh.sbh); | |
1da177e4 LT |
1294 | } |
1295 | unlock_kernel(); | |
28de7948 | 1296 | |
1da177e4 LT |
1297 | return retval; |
1298 | } | |
1299 | ||
c5ef1c42 | 1300 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1301 | .lookup = udf_lookup, |
1302 | .create = udf_create, | |
1303 | .link = udf_link, | |
1304 | .unlink = udf_unlink, | |
1305 | .symlink = udf_symlink, | |
1306 | .mkdir = udf_mkdir, | |
1307 | .rmdir = udf_rmdir, | |
1308 | .mknod = udf_mknod, | |
1309 | .rename = udf_rename, | |
1da177e4 | 1310 | }; |