Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * namei.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998-2004 Ben Fennema | |
14 | * (C) 1999-2000 Stelias Computing Inc | |
15 | * | |
16 | * HISTORY | |
17 | * | |
18 | * 12/12/98 blf Created. Split out the lookup code from dir.c | |
19 | * 04/19/99 blf link, mknod, symlink support | |
20 | */ | |
21 | ||
22 | #include "udfdecl.h" | |
23 | ||
24 | #include "udf_i.h" | |
25 | #include "udf_sb.h" | |
26 | #include <linux/string.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/quotaops.h> | |
31 | #include <linux/smp_lock.h> | |
32 | #include <linux/buffer_head.h> | |
e8edc6e0 | 33 | #include <linux/sched.h> |
1da177e4 | 34 | |
cb00ea35 CG |
35 | static inline int udf_match(int len1, const char *name1, int len2, |
36 | const char *name2) | |
1da177e4 LT |
37 | { |
38 | if (len1 != len2) | |
39 | return 0; | |
28de7948 | 40 | |
1da177e4 LT |
41 | return !memcmp(name1, name2, len1); |
42 | } | |
43 | ||
44 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 CG |
45 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
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); | |
71 | memcpy(fibh->ebh->b_data, impuse - offset, liu + offset); | |
1da177e4 LT |
72 | } |
73 | } | |
74 | ||
75 | offset += liu; | |
76 | ||
cb00ea35 | 77 | if (fileident) { |
28de7948 CG |
78 | if (adinicb || (offset + lfi < 0)) { |
79 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
80 | } else if (offset >= 0) { | |
1da177e4 | 81 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 CG |
82 | } else { |
83 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, -offset); | |
84 | memcpy(fibh->ebh->b_data, fileident - offset, lfi + offset); | |
1da177e4 LT |
85 | } |
86 | } | |
87 | ||
88 | offset += lfi; | |
89 | ||
28de7948 CG |
90 | if (adinicb || (offset + padlen < 0)) { |
91 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
92 | } else if (offset >= 0) { | |
1da177e4 | 93 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
94 | } else { |
95 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
96 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
97 | } | |
98 | ||
28de7948 CG |
99 | crc = udf_crc((uint8_t *)cfi + sizeof(tag), |
100 | sizeof(struct fileIdentDesc) - sizeof(tag), 0); | |
101 | ||
102 | if (fibh->sbh == fibh->ebh) { | |
103 | crc = udf_crc((uint8_t *)sfi->impUse, | |
104 | crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc); | |
105 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { | |
106 | crc = udf_crc(fibh->ebh->b_data + sizeof(struct fileIdentDesc) + fibh->soffset, | |
107 | crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc); | |
108 | } else { | |
109 | crc = udf_crc((uint8_t *)sfi->impUse, | |
110 | -fibh->soffset - sizeof(struct fileIdentDesc), crc); | |
1da177e4 LT |
111 | crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc); |
112 | } | |
113 | ||
114 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
115 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
116 | ||
28de7948 | 117 | for (i = 0; i < 16; i++) { |
1da177e4 | 118 | if (i != 4) |
28de7948 CG |
119 | checksum += ((uint8_t *)&cfi->descTag)[i]; |
120 | } | |
1da177e4 LT |
121 | |
122 | cfi->descTag.tagChecksum = checksum; | |
28de7948 CG |
123 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
124 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, sizeof(struct fileIdentDesc)); | |
125 | } else { | |
126 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
127 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 128 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
129 | } |
130 | ||
28de7948 | 131 | if (adinicb) { |
1da177e4 | 132 | mark_inode_dirty(inode); |
28de7948 | 133 | } else { |
1da177e4 LT |
134 | if (fibh->sbh != fibh->ebh) |
135 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
136 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
137 | } | |
138 | return 0; | |
139 | } | |
140 | ||
cb00ea35 CG |
141 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
142 | struct dentry *dentry, | |
143 | struct udf_fileident_bh *fibh, | |
144 | struct fileIdentDesc *cfi) | |
1da177e4 | 145 | { |
cb00ea35 | 146 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
147 | loff_t f_pos; |
148 | int block, flen; | |
149 | char fname[UDF_NAME_LEN]; | |
150 | char *nameptr; | |
151 | uint8_t lfi; | |
152 | uint16_t liu; | |
ec471dc4 | 153 | loff_t size; |
ff116fc8 JK |
154 | kernel_lb_addr eloc; |
155 | uint32_t elen; | |
60448b1d | 156 | sector_t offset; |
28de7948 | 157 | struct extent_position epos = {}; |
1da177e4 | 158 | |
ec471dc4 | 159 | size = (udf_ext0_offset(dir) + dir->i_size) >> 2; |
1da177e4 LT |
160 | f_pos = (udf_ext0_offset(dir) >> 2); |
161 | ||
28de7948 CG |
162 | fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; |
163 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { | |
1da177e4 | 164 | fibh->sbh = fibh->ebh = NULL; |
28de7948 CG |
165 | } else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
166 | &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 167 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 168 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 169 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 170 | epos.offset -= sizeof(short_ad); |
1da177e4 | 171 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 172 | epos.offset -= sizeof(long_ad); |
28de7948 | 173 | } else { |
1da177e4 | 174 | offset = 0; |
28de7948 | 175 | } |
1da177e4 | 176 | |
cb00ea35 | 177 | if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block))) { |
3bf25cb4 | 178 | brelse(epos.bh); |
1da177e4 LT |
179 | return NULL; |
180 | } | |
cb00ea35 | 181 | } else { |
3bf25cb4 | 182 | brelse(epos.bh); |
1da177e4 LT |
183 | return NULL; |
184 | } | |
185 | ||
cb00ea35 CG |
186 | while ((f_pos < size)) { |
187 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, | |
188 | &elen, &offset); | |
cb00ea35 | 189 | if (!fi) { |
1da177e4 | 190 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
191 | brelse(fibh->ebh); |
192 | brelse(fibh->sbh); | |
193 | brelse(epos.bh); | |
1da177e4 LT |
194 | return NULL; |
195 | } | |
196 | ||
197 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
198 | lfi = cfi->lengthFileIdent; | |
199 | ||
cb00ea35 | 200 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 201 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 202 | } else { |
1da177e4 LT |
203 | int poffset; /* Unpaded ending offset */ |
204 | ||
28de7948 | 205 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi; |
1da177e4 | 206 | |
28de7948 CG |
207 | if (poffset >= lfi) { |
208 | nameptr = (uint8_t *)(fibh->ebh->b_data + poffset - lfi); | |
209 | } else { | |
1da177e4 | 210 | nameptr = fname; |
28de7948 CG |
211 | memcpy(nameptr, fi->fileIdent + liu, lfi - poffset); |
212 | memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset); | |
1da177e4 LT |
213 | } |
214 | } | |
215 | ||
cb00ea35 CG |
216 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
217 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
218 | continue; |
219 | } | |
cb00ea35 CG |
220 | |
221 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
222 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
223 | continue; |
224 | } | |
225 | ||
226 | if (!lfi) | |
227 | continue; | |
228 | ||
cb00ea35 | 229 | if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi))) { |
28de7948 | 230 | if (udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name)) { |
3bf25cb4 | 231 | brelse(epos.bh); |
1da177e4 LT |
232 | return fi; |
233 | } | |
234 | } | |
235 | } | |
28de7948 | 236 | |
1da177e4 | 237 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
238 | brelse(fibh->ebh); |
239 | brelse(fibh->sbh); | |
240 | brelse(epos.bh); | |
28de7948 | 241 | |
1da177e4 LT |
242 | return NULL; |
243 | } | |
244 | ||
245 | /* | |
246 | * udf_lookup | |
247 | * | |
248 | * PURPOSE | |
249 | * Look-up the inode for a given name. | |
250 | * | |
251 | * DESCRIPTION | |
252 | * Required - lookup_dentry() will return -ENOTDIR if this routine is not | |
253 | * available for a directory. The filesystem is useless if this routine is | |
254 | * not available for at least the filesystem's root directory. | |
255 | * | |
256 | * This routine is passed an incomplete dentry - it must be completed by | |
257 | * calling d_add(dentry, inode). If the name does not exist, then the | |
258 | * specified inode must be set to null. An error should only be returned | |
259 | * when the lookup fails for a reason other than the name not existing. | |
260 | * Note that the directory inode semaphore is held during the call. | |
261 | * | |
262 | * Refer to lookup_dentry() in fs/namei.c | |
263 | * lookup_dentry() -> lookup() -> real_lookup() -> . | |
264 | * | |
265 | * PRE-CONDITIONS | |
266 | * dir Pointer to inode of parent directory. | |
267 | * dentry Pointer to dentry to complete. | |
268 | * nd Pointer to lookup nameidata | |
269 | * | |
270 | * POST-CONDITIONS | |
271 | * <return> Zero on success. | |
272 | * | |
273 | * HISTORY | |
274 | * July 1, 1997 - Andrew E. Mileski | |
275 | * Written, tested, and released. | |
276 | */ | |
277 | ||
cb00ea35 CG |
278 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
279 | struct nameidata *nd) | |
1da177e4 LT |
280 | { |
281 | struct inode *inode = NULL; | |
db9a369e | 282 | struct fileIdentDesc cfi; |
1da177e4 LT |
283 | struct udf_fileident_bh fibh; |
284 | ||
cb00ea35 | 285 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
286 | return ERR_PTR(-ENAMETOOLONG); |
287 | ||
288 | lock_kernel(); | |
289 | #ifdef UDF_RECOVERY | |
290 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 291 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
28de7948 CG |
292 | kernel_lb_addr lb = { |
293 | .logicalBlockNum = 0, | |
294 | .partitionReferenceNum = simple_strtoul(dentry->d_name.name + 3, | |
295 | NULL, 0), | |
296 | }; | |
1da177e4 | 297 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 298 | if (!inode) { |
1da177e4 LT |
299 | unlock_kernel(); |
300 | return ERR_PTR(-EACCES); | |
301 | } | |
28de7948 CG |
302 | } |
303 | else | |
304 | #endif /* UDF_RECOVERY */ | |
1da177e4 | 305 | |
cb00ea35 | 306 | if (udf_find_entry(dir, dentry, &fibh, &cfi)) { |
1da177e4 | 307 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
308 | brelse(fibh.ebh); |
309 | brelse(fibh.sbh); | |
1da177e4 LT |
310 | |
311 | inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); | |
cb00ea35 | 312 | if (!inode) { |
1da177e4 LT |
313 | unlock_kernel(); |
314 | return ERR_PTR(-EACCES); | |
315 | } | |
316 | } | |
317 | unlock_kernel(); | |
318 | d_add(dentry, inode); | |
28de7948 | 319 | |
1da177e4 LT |
320 | return NULL; |
321 | } | |
322 | ||
cb00ea35 CG |
323 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
324 | struct dentry *dentry, | |
325 | struct udf_fileident_bh *fibh, | |
326 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 327 | { |
6c79e987 | 328 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 329 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
330 | char name[UDF_NAME_LEN], fname[UDF_NAME_LEN]; |
331 | int namelen; | |
332 | loff_t f_pos; | |
333 | int flen; | |
334 | char *nameptr; | |
335 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
336 | int nfidlen; | |
337 | uint8_t lfi; | |
338 | uint16_t liu; | |
339 | int block; | |
ff116fc8 JK |
340 | kernel_lb_addr eloc; |
341 | uint32_t elen; | |
60448b1d | 342 | sector_t offset; |
28de7948 | 343 | struct extent_position epos = {}; |
1da177e4 | 344 | |
cb00ea35 CG |
345 | if (dentry) { |
346 | if (!dentry->d_name.len) { | |
1da177e4 LT |
347 | *err = -EINVAL; |
348 | return NULL; | |
349 | } | |
28de7948 CG |
350 | if (!(namelen = udf_put_filename(sb, dentry->d_name.name, name, |
351 | dentry->d_name.len))) { | |
1da177e4 LT |
352 | *err = -ENAMETOOLONG; |
353 | return NULL; | |
354 | } | |
28de7948 | 355 | } else { |
1da177e4 | 356 | namelen = 0; |
28de7948 | 357 | } |
1da177e4 LT |
358 | |
359 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
360 | ||
361 | f_pos = (udf_ext0_offset(dir) >> 2); | |
362 | ||
28de7948 CG |
363 | fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; |
364 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { | |
1da177e4 | 365 | fibh->sbh = fibh->ebh = NULL; |
28de7948 CG |
366 | } else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
367 | &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 368 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 369 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 370 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 371 | epos.offset -= sizeof(short_ad); |
1da177e4 | 372 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 373 | epos.offset -= sizeof(long_ad); |
28de7948 | 374 | } else { |
1da177e4 | 375 | offset = 0; |
28de7948 | 376 | } |
1da177e4 | 377 | |
cb00ea35 | 378 | if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block))) { |
3bf25cb4 | 379 | brelse(epos.bh); |
1da177e4 LT |
380 | *err = -EIO; |
381 | return NULL; | |
382 | } | |
383 | ||
384 | block = UDF_I_LOCATION(dir).logicalBlockNum; | |
385 | ||
cb00ea35 | 386 | } else { |
1da177e4 LT |
387 | block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0); |
388 | fibh->sbh = fibh->ebh = NULL; | |
389 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
390 | goto add; | |
391 | } | |
392 | ||
cb00ea35 CG |
393 | while ((f_pos < size)) { |
394 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, | |
395 | &elen, &offset); | |
1da177e4 | 396 | |
cb00ea35 | 397 | if (!fi) { |
1da177e4 | 398 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
399 | brelse(fibh->ebh); |
400 | brelse(fibh->sbh); | |
401 | brelse(epos.bh); | |
1da177e4 LT |
402 | *err = -EIO; |
403 | return NULL; | |
404 | } | |
405 | ||
406 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
407 | lfi = cfi->lengthFileIdent; | |
408 | ||
28de7948 | 409 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 410 | nameptr = fi->fileIdent + liu; |
28de7948 | 411 | } else { |
1da177e4 LT |
412 | int poffset; /* Unpaded ending offset */ |
413 | ||
28de7948 | 414 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi; |
1da177e4 | 415 | |
28de7948 CG |
416 | if (poffset >= lfi) { |
417 | nameptr = (char *)(fibh->ebh->b_data + poffset - lfi); | |
418 | } else { | |
1da177e4 | 419 | nameptr = fname; |
28de7948 CG |
420 | memcpy(nameptr, fi->fileIdent + liu, lfi - poffset); |
421 | memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset); | |
1da177e4 LT |
422 | } |
423 | } | |
424 | ||
cb00ea35 | 425 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
28de7948 | 426 | if (((sizeof(struct fileIdentDesc) + liu + lfi + 3) & ~3) == nfidlen) { |
3bf25cb4 | 427 | brelse(epos.bh); |
1da177e4 LT |
428 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
429 | cfi->fileVersionNum = cpu_to_le16(1); | |
430 | cfi->fileCharacteristics = 0; | |
431 | cfi->lengthFileIdent = namelen; | |
432 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
28de7948 | 433 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 434 | return fi; |
28de7948 | 435 | } else { |
1da177e4 LT |
436 | *err = -EIO; |
437 | return NULL; | |
438 | } | |
439 | } | |
440 | } | |
441 | ||
442 | if (!lfi || !dentry) | |
443 | continue; | |
444 | ||
445 | if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)) && | |
28de7948 | 446 | udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name)) { |
1da177e4 | 447 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
448 | brelse(fibh->ebh); |
449 | brelse(fibh->sbh); | |
450 | brelse(epos.bh); | |
1da177e4 LT |
451 | *err = -EEXIST; |
452 | return NULL; | |
453 | } | |
454 | } | |
455 | ||
28de7948 | 456 | add: |
1da177e4 LT |
457 | f_pos += nfidlen; |
458 | ||
459 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB && | |
cb00ea35 | 460 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 461 | brelse(epos.bh); |
ff116fc8 | 462 | epos.bh = NULL; |
1da177e4 LT |
463 | fibh->soffset -= udf_ext0_offset(dir); |
464 | fibh->eoffset -= udf_ext0_offset(dir); | |
465 | f_pos -= (udf_ext0_offset(dir) >> 2); | |
466 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
467 | brelse(fibh->ebh); |
468 | brelse(fibh->sbh); | |
28de7948 | 469 | if (!(fibh->sbh = fibh->ebh = udf_expand_dir_adinicb(dir, &block, err))) |
1da177e4 | 470 | return NULL; |
ff116fc8 | 471 | epos.block = UDF_I_LOCATION(dir); |
1da177e4 | 472 | eloc.logicalBlockNum = block; |
28de7948 | 473 | eloc.partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum; |
1da177e4 | 474 | elen = dir->i_sb->s_blocksize; |
ff116fc8 | 475 | epos.offset = udf_file_entry_alloc_offset(dir); |
1da177e4 | 476 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 477 | epos.offset += sizeof(short_ad); |
1da177e4 | 478 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 479 | epos.offset += sizeof(long_ad); |
1da177e4 LT |
480 | } |
481 | ||
cb00ea35 | 482 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
483 | fibh->soffset = fibh->eoffset; |
484 | fibh->eoffset += nfidlen; | |
cb00ea35 | 485 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 486 | brelse(fibh->sbh); |
1da177e4 LT |
487 | fibh->sbh = fibh->ebh; |
488 | } | |
489 | ||
cb00ea35 | 490 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 491 | block = UDF_I_LOCATION(dir).logicalBlockNum; |
28de7948 | 492 | fi = (struct fileIdentDesc *)(UDF_I_DATA(dir) + fibh->soffset - |
cb00ea35 CG |
493 | udf_ext0_offset(dir) + |
494 | UDF_I_LENEATTR(dir)); | |
495 | } else { | |
1da177e4 | 496 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 CG |
497 | dir->i_sb->s_blocksize_bits); |
498 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 499 | } |
cb00ea35 | 500 | } else { |
1da177e4 LT |
501 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
502 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 503 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 504 | brelse(fibh->sbh); |
1da177e4 LT |
505 | fibh->sbh = fibh->ebh; |
506 | } | |
507 | ||
508 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 509 | dir->i_sb->s_blocksize_bits); |
28de7948 CG |
510 | fibh->ebh = udf_bread(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 1, err); |
511 | if (!fibh->ebh) { | |
3bf25cb4 JK |
512 | brelse(epos.bh); |
513 | brelse(fibh->sbh); | |
1da177e4 LT |
514 | return NULL; |
515 | } | |
516 | ||
28de7948 | 517 | if (!fibh->soffset) { |
ff116fc8 | 518 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 519 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 520 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 CG |
521 | dir->i_sb->s_blocksize_bits); |
522 | } else { | |
cb00ea35 | 523 | block++; |
28de7948 | 524 | } |
1da177e4 | 525 | |
3bf25cb4 | 526 | brelse(fibh->sbh); |
1da177e4 LT |
527 | fibh->sbh = fibh->ebh; |
528 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 529 | } else { |
1da177e4 | 530 | fi = (struct fileIdentDesc *) |
28de7948 | 531 | (fibh->sbh->b_data + sb->s_blocksize + fibh->soffset); |
1da177e4 LT |
532 | } |
533 | } | |
534 | ||
535 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 536 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
28de7948 | 537 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, sizeof(tag)); |
1da177e4 | 538 | else |
28de7948 | 539 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, sizeof(tag)); |
1da177e4 LT |
540 | cfi->fileVersionNum = cpu_to_le16(1); |
541 | cfi->lengthFileIdent = namelen; | |
542 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 543 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
3bf25cb4 | 544 | brelse(epos.bh); |
1da177e4 LT |
545 | dir->i_size += nfidlen; |
546 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
547 | UDF_I_LENALLOC(dir) += nfidlen; | |
548 | mark_inode_dirty(dir); | |
549 | return fi; | |
cb00ea35 | 550 | } else { |
3bf25cb4 | 551 | brelse(epos.bh); |
1da177e4 | 552 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
553 | brelse(fibh->ebh); |
554 | brelse(fibh->sbh); | |
1da177e4 LT |
555 | *err = -EIO; |
556 | return NULL; | |
557 | } | |
558 | } | |
559 | ||
560 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
561 | struct udf_fileident_bh *fibh, |
562 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
563 | { |
564 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 565 | |
1da177e4 LT |
566 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
567 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 568 | |
1da177e4 LT |
569 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
570 | } | |
571 | ||
cb00ea35 CG |
572 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
573 | struct nameidata *nd) | |
1da177e4 LT |
574 | { |
575 | struct udf_fileident_bh fibh; | |
576 | struct inode *inode; | |
577 | struct fileIdentDesc cfi, *fi; | |
578 | int err; | |
579 | ||
580 | lock_kernel(); | |
581 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 582 | if (!inode) { |
1da177e4 LT |
583 | unlock_kernel(); |
584 | return err; | |
585 | } | |
586 | ||
587 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
588 | inode->i_data.a_ops = &udf_adinicb_aops; | |
589 | else | |
590 | inode->i_data.a_ops = &udf_aops; | |
591 | inode->i_op = &udf_file_inode_operations; | |
592 | inode->i_fop = &udf_file_operations; | |
593 | inode->i_mode = mode; | |
594 | mark_inode_dirty(inode); | |
595 | ||
cb00ea35 CG |
596 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
597 | inode->i_nlink--; | |
1da177e4 LT |
598 | mark_inode_dirty(inode); |
599 | iput(inode); | |
600 | unlock_kernel(); | |
601 | return err; | |
602 | } | |
603 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
604 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
28de7948 CG |
605 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
606 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 | 607 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
cb00ea35 | 608 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
609 | mark_inode_dirty(dir); |
610 | } | |
611 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
612 | brelse(fibh.ebh); |
613 | brelse(fibh.sbh); | |
1da177e4 LT |
614 | unlock_kernel(); |
615 | d_instantiate(dentry, inode); | |
28de7948 | 616 | |
1da177e4 LT |
617 | return 0; |
618 | } | |
619 | ||
cb00ea35 CG |
620 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
621 | dev_t rdev) | |
1da177e4 | 622 | { |
cb00ea35 | 623 | struct inode *inode; |
1da177e4 LT |
624 | struct udf_fileident_bh fibh; |
625 | struct fileIdentDesc cfi, *fi; | |
626 | int err; | |
627 | ||
628 | if (!old_valid_dev(rdev)) | |
629 | return -EINVAL; | |
630 | ||
631 | lock_kernel(); | |
632 | err = -EIO; | |
633 | inode = udf_new_inode(dir, mode, &err); | |
634 | if (!inode) | |
635 | goto out; | |
636 | ||
637 | inode->i_uid = current->fsuid; | |
638 | init_special_inode(inode, mode, rdev); | |
cb00ea35 CG |
639 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
640 | inode->i_nlink--; | |
1da177e4 LT |
641 | mark_inode_dirty(inode); |
642 | iput(inode); | |
643 | unlock_kernel(); | |
644 | return err; | |
645 | } | |
646 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
647 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
28de7948 CG |
648 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
649 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 | 650 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
cb00ea35 | 651 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
652 | mark_inode_dirty(dir); |
653 | } | |
654 | mark_inode_dirty(inode); | |
655 | ||
656 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
657 | brelse(fibh.ebh); |
658 | brelse(fibh.sbh); | |
1da177e4 LT |
659 | d_instantiate(dentry, inode); |
660 | err = 0; | |
28de7948 CG |
661 | |
662 | out: | |
1da177e4 LT |
663 | unlock_kernel(); |
664 | return err; | |
665 | } | |
666 | ||
cb00ea35 | 667 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 668 | { |
cb00ea35 | 669 | struct inode *inode; |
1da177e4 LT |
670 | struct udf_fileident_bh fibh; |
671 | struct fileIdentDesc cfi, *fi; | |
672 | int err; | |
673 | ||
674 | lock_kernel(); | |
675 | err = -EMLINK; | |
cb00ea35 | 676 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
677 | goto out; |
678 | ||
679 | err = -EIO; | |
680 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
681 | if (!inode) | |
682 | goto out; | |
683 | ||
684 | inode->i_op = &udf_dir_inode_operations; | |
685 | inode->i_fop = &udf_dir_operations; | |
cb00ea35 | 686 | if (!(fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err))) { |
1da177e4 LT |
687 | inode->i_nlink--; |
688 | mark_inode_dirty(inode); | |
689 | iput(inode); | |
690 | goto out; | |
691 | } | |
692 | inode->i_nlink = 2; | |
693 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
694 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir)); | |
28de7948 CG |
695 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
696 | cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL); | |
697 | cfi.fileCharacteristics = FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 698 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 699 | brelse(fibh.sbh); |
1da177e4 LT |
700 | inode->i_mode = S_IFDIR | mode; |
701 | if (dir->i_mode & S_ISGID) | |
702 | inode->i_mode |= S_ISGID; | |
703 | mark_inode_dirty(inode); | |
704 | ||
cb00ea35 | 705 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
1da177e4 LT |
706 | inode->i_nlink = 0; |
707 | mark_inode_dirty(inode); | |
708 | iput(inode); | |
709 | goto out; | |
710 | } | |
711 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
712 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
28de7948 CG |
713 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
714 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
715 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
716 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 717 | inc_nlink(dir); |
1da177e4 LT |
718 | mark_inode_dirty(dir); |
719 | d_instantiate(dentry, inode); | |
720 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
721 | brelse(fibh.ebh); |
722 | brelse(fibh.sbh); | |
1da177e4 | 723 | err = 0; |
28de7948 CG |
724 | |
725 | out: | |
1da177e4 LT |
726 | unlock_kernel(); |
727 | return err; | |
728 | } | |
729 | ||
730 | static int empty_dir(struct inode *dir) | |
731 | { | |
732 | struct fileIdentDesc *fi, cfi; | |
733 | struct udf_fileident_bh fibh; | |
734 | loff_t f_pos; | |
735 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
736 | int block; | |
ff116fc8 JK |
737 | kernel_lb_addr eloc; |
738 | uint32_t elen; | |
60448b1d | 739 | sector_t offset; |
28de7948 | 740 | struct extent_position epos = {}; |
1da177e4 LT |
741 | |
742 | f_pos = (udf_ext0_offset(dir) >> 2); | |
743 | ||
28de7948 | 744 | fibh.soffset = fibh.eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; |
1da177e4 | 745 | |
28de7948 | 746 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 747 | fibh.sbh = fibh.ebh = NULL; |
28de7948 CG |
748 | } else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
749 | &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 750 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 751 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 752 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 753 | epos.offset -= sizeof(short_ad); |
1da177e4 | 754 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 755 | epos.offset -= sizeof(long_ad); |
28de7948 | 756 | } else { |
1da177e4 | 757 | offset = 0; |
28de7948 | 758 | } |
1da177e4 | 759 | |
cb00ea35 | 760 | if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block))) { |
3bf25cb4 | 761 | brelse(epos.bh); |
1da177e4 LT |
762 | return 0; |
763 | } | |
cb00ea35 | 764 | } else { |
3bf25cb4 | 765 | brelse(epos.bh); |
1da177e4 LT |
766 | return 0; |
767 | } | |
768 | ||
cb00ea35 CG |
769 | while ((f_pos < size)) { |
770 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, | |
771 | &elen, &offset); | |
cb00ea35 | 772 | if (!fi) { |
1da177e4 | 773 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
774 | brelse(fibh.ebh); |
775 | brelse(fibh.sbh); | |
776 | brelse(epos.bh); | |
1da177e4 LT |
777 | return 0; |
778 | } | |
779 | ||
28de7948 CG |
780 | if (cfi.lengthFileIdent && |
781 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 782 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
783 | brelse(fibh.ebh); |
784 | brelse(fibh.sbh); | |
785 | brelse(epos.bh); | |
1da177e4 LT |
786 | return 0; |
787 | } | |
788 | } | |
28de7948 | 789 | |
1da177e4 | 790 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
791 | brelse(fibh.ebh); |
792 | brelse(fibh.sbh); | |
793 | brelse(epos.bh); | |
28de7948 | 794 | |
1da177e4 LT |
795 | return 1; |
796 | } | |
797 | ||
cb00ea35 | 798 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
799 | { |
800 | int retval; | |
cb00ea35 | 801 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
802 | struct udf_fileident_bh fibh; |
803 | struct fileIdentDesc *fi, cfi; | |
804 | kernel_lb_addr tloc; | |
805 | ||
806 | retval = -ENOENT; | |
807 | lock_kernel(); | |
808 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
809 | if (!fi) | |
810 | goto out; | |
811 | ||
812 | retval = -EIO; | |
813 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
814 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
815 | goto end_rmdir; | |
816 | retval = -ENOTEMPTY; | |
817 | if (!empty_dir(inode)) | |
818 | goto end_rmdir; | |
819 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
820 | if (retval) | |
821 | goto end_rmdir; | |
822 | if (inode->i_nlink != 2) | |
823 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
824 | "empty directory has nlink != 2 (%d)", |
825 | inode->i_nlink); | |
ce71ec36 | 826 | clear_nlink(inode); |
1da177e4 | 827 | inode->i_size = 0; |
c007c06e | 828 | inode_dec_link_count(dir); |
28de7948 | 829 | inode->i_ctime = dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); |
1da177e4 LT |
830 | mark_inode_dirty(dir); |
831 | ||
28de7948 | 832 | end_rmdir: |
1da177e4 | 833 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
834 | brelse(fibh.ebh); |
835 | brelse(fibh.sbh); | |
28de7948 CG |
836 | |
837 | out: | |
1da177e4 LT |
838 | unlock_kernel(); |
839 | return retval; | |
840 | } | |
841 | ||
cb00ea35 | 842 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
843 | { |
844 | int retval; | |
cb00ea35 | 845 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
846 | struct udf_fileident_bh fibh; |
847 | struct fileIdentDesc *fi; | |
848 | struct fileIdentDesc cfi; | |
849 | kernel_lb_addr tloc; | |
850 | ||
851 | retval = -ENOENT; | |
852 | lock_kernel(); | |
853 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
854 | if (!fi) | |
855 | goto out; | |
856 | ||
857 | retval = -EIO; | |
858 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
859 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
860 | goto end_unlink; | |
861 | ||
cb00ea35 | 862 | if (!inode->i_nlink) { |
1da177e4 | 863 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 864 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
865 | inode->i_nlink = 1; |
866 | } | |
867 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
868 | if (retval) | |
869 | goto end_unlink; | |
870 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
871 | mark_inode_dirty(dir); | |
9a53c3a7 | 872 | inode_dec_link_count(inode); |
1da177e4 LT |
873 | inode->i_ctime = dir->i_ctime; |
874 | retval = 0; | |
875 | ||
28de7948 | 876 | end_unlink: |
1da177e4 | 877 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
878 | brelse(fibh.ebh); |
879 | brelse(fibh.sbh); | |
28de7948 CG |
880 | |
881 | out: | |
1da177e4 LT |
882 | unlock_kernel(); |
883 | return retval; | |
884 | } | |
885 | ||
cb00ea35 CG |
886 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
887 | const char *symname) | |
1da177e4 | 888 | { |
cb00ea35 | 889 | struct inode *inode; |
1da177e4 LT |
890 | struct pathComponent *pc; |
891 | char *compstart; | |
892 | struct udf_fileident_bh fibh; | |
28de7948 | 893 | struct extent_position epos = {}; |
1da177e4 LT |
894 | int eoffset, elen = 0; |
895 | struct fileIdentDesc *fi; | |
896 | struct fileIdentDesc cfi; | |
897 | char *ea; | |
898 | int err; | |
899 | int block; | |
900 | char name[UDF_NAME_LEN]; | |
901 | int namelen; | |
6c79e987 | 902 | struct buffer_head *bh; |
1da177e4 LT |
903 | |
904 | lock_kernel(); | |
905 | if (!(inode = udf_new_inode(dir, S_IFLNK, &err))) | |
906 | goto out; | |
907 | ||
908 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
909 | inode->i_data.a_ops = &udf_symlink_aops; | |
910 | inode->i_op = &page_symlink_inode_operations; | |
911 | ||
cb00ea35 | 912 | if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 JK |
913 | kernel_lb_addr eloc; |
914 | uint32_t elen; | |
1da177e4 LT |
915 | |
916 | block = udf_new_block(inode->i_sb, inode, | |
28de7948 CG |
917 | UDF_I_LOCATION(inode).partitionReferenceNum, |
918 | UDF_I_LOCATION(inode).logicalBlockNum, &err); | |
1da177e4 LT |
919 | if (!block) |
920 | goto out_no_entry; | |
ff116fc8 JK |
921 | epos.block = UDF_I_LOCATION(inode); |
922 | epos.offset = udf_file_entry_alloc_offset(inode); | |
923 | epos.bh = NULL; | |
1da177e4 | 924 | eloc.logicalBlockNum = block; |
28de7948 | 925 | eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; |
1da177e4 LT |
926 | elen = inode->i_sb->s_blocksize; |
927 | UDF_I_LENEXTENTS(inode) = elen; | |
ff116fc8 | 928 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 929 | brelse(epos.bh); |
1da177e4 LT |
930 | |
931 | block = udf_get_pblock(inode->i_sb, block, | |
28de7948 | 932 | UDF_I_LOCATION(inode).partitionReferenceNum, 0); |
ff116fc8 JK |
933 | epos.bh = udf_tread(inode->i_sb, block); |
934 | lock_buffer(epos.bh); | |
935 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
936 | set_buffer_uptodate(epos.bh); | |
937 | unlock_buffer(epos.bh); | |
938 | mark_buffer_dirty_inode(epos.bh, inode); | |
939 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
28de7948 | 940 | } else { |
1da177e4 | 941 | ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode); |
28de7948 | 942 | } |
1da177e4 LT |
943 | |
944 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
945 | pc = (struct pathComponent *)ea; | |
946 | ||
cb00ea35 CG |
947 | if (*symname == '/') { |
948 | do { | |
1da177e4 LT |
949 | symname++; |
950 | } while (*symname == '/'); | |
951 | ||
952 | pc->componentType = 1; | |
953 | pc->lengthComponentIdent = 0; | |
954 | pc->componentFileVersionNum = 0; | |
955 | pc += sizeof(struct pathComponent); | |
956 | elen += sizeof(struct pathComponent); | |
957 | } | |
958 | ||
959 | err = -ENAMETOOLONG; | |
960 | ||
cb00ea35 | 961 | while (*symname) { |
1da177e4 LT |
962 | if (elen + sizeof(struct pathComponent) > eoffset) |
963 | goto out_no_entry; | |
964 | ||
965 | pc = (struct pathComponent *)(ea + elen); | |
966 | ||
967 | compstart = (char *)symname; | |
968 | ||
cb00ea35 | 969 | do { |
1da177e4 LT |
970 | symname++; |
971 | } while (*symname && *symname != '/'); | |
972 | ||
973 | pc->componentType = 5; | |
974 | pc->lengthComponentIdent = 0; | |
975 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
976 | if (compstart[0] == '.') { |
977 | if ((symname - compstart) == 1) | |
1da177e4 | 978 | pc->componentType = 4; |
28de7948 | 979 | else if ((symname - compstart) == 2 && compstart[1] == '.') |
1da177e4 LT |
980 | pc->componentType = 3; |
981 | } | |
982 | ||
cb00ea35 | 983 | if (pc->componentType == 5) { |
28de7948 CG |
984 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
985 | symname - compstart); | |
986 | if (!namelen) | |
1da177e4 LT |
987 | goto out_no_entry; |
988 | ||
28de7948 | 989 | if (elen + sizeof(struct pathComponent) + namelen > eoffset) |
1da177e4 LT |
990 | goto out_no_entry; |
991 | else | |
992 | pc->lengthComponentIdent = namelen; | |
993 | ||
994 | memcpy(pc->componentIdent, name, namelen); | |
995 | } | |
996 | ||
997 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
998 | ||
cb00ea35 CG |
999 | if (*symname) { |
1000 | do { | |
1da177e4 LT |
1001 | symname++; |
1002 | } while (*symname == '/'); | |
1003 | } | |
1004 | } | |
1005 | ||
3bf25cb4 | 1006 | brelse(epos.bh); |
1da177e4 LT |
1007 | inode->i_size = elen; |
1008 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
1009 | UDF_I_LENALLOC(inode) = inode->i_size; | |
1010 | mark_inode_dirty(inode); | |
1011 | ||
1012 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) | |
1013 | goto out_no_entry; | |
1014 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
1015 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
6c79e987 MS |
1016 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1017 | if (bh) { | |
1018 | struct logicalVolIntegrityDesc *lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1019 | struct logicalVolHeaderDesc *lvhd; |
1020 | uint64_t uniqueID; | |
6c79e987 | 1021 | lvhd = (struct logicalVolHeaderDesc *)(lvid->logicalVolContentsUse); |
1da177e4 | 1022 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1023 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1024 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1025 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1026 | uniqueID += 16; | |
1027 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1028 | mark_buffer_dirty(bh); |
1da177e4 LT |
1029 | } |
1030 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
cb00ea35 | 1031 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
1032 | mark_inode_dirty(dir); |
1033 | } | |
1034 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
1035 | brelse(fibh.ebh); |
1036 | brelse(fibh.sbh); | |
1da177e4 LT |
1037 | d_instantiate(dentry, inode); |
1038 | err = 0; | |
1039 | ||
28de7948 | 1040 | out: |
1da177e4 LT |
1041 | unlock_kernel(); |
1042 | return err; | |
1043 | ||
28de7948 | 1044 | out_no_entry: |
9a53c3a7 | 1045 | inode_dec_link_count(inode); |
1da177e4 LT |
1046 | iput(inode); |
1047 | goto out; | |
1048 | } | |
1049 | ||
cb00ea35 CG |
1050 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1051 | struct dentry *dentry) | |
1da177e4 LT |
1052 | { |
1053 | struct inode *inode = old_dentry->d_inode; | |
1054 | struct udf_fileident_bh fibh; | |
1055 | struct fileIdentDesc cfi, *fi; | |
1056 | int err; | |
6c79e987 | 1057 | struct buffer_head *bh; |
1da177e4 LT |
1058 | |
1059 | lock_kernel(); | |
cb00ea35 | 1060 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1061 | unlock_kernel(); |
1062 | return -EMLINK; | |
1063 | } | |
1064 | ||
cb00ea35 | 1065 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
1da177e4 LT |
1066 | unlock_kernel(); |
1067 | return err; | |
1068 | } | |
1069 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
1070 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
6c79e987 MS |
1071 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1072 | if (bh) { | |
1073 | struct logicalVolIntegrityDesc *lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1074 | struct logicalVolHeaderDesc *lvhd; |
1075 | uint64_t uniqueID; | |
6c79e987 | 1076 | lvhd = (struct logicalVolHeaderDesc *)(lvid->logicalVolContentsUse); |
1da177e4 | 1077 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1078 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1079 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1080 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1081 | uniqueID += 16; | |
1082 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1083 | mark_buffer_dirty(bh); |
1da177e4 LT |
1084 | } |
1085 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
cb00ea35 | 1086 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
1087 | mark_inode_dirty(dir); |
1088 | } | |
28de7948 | 1089 | |
1da177e4 | 1090 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1091 | brelse(fibh.ebh); |
1092 | brelse(fibh.sbh); | |
d8c76e6f | 1093 | inc_nlink(inode); |
1da177e4 LT |
1094 | inode->i_ctime = current_fs_time(inode->i_sb); |
1095 | mark_inode_dirty(inode); | |
1096 | atomic_inc(&inode->i_count); | |
1097 | d_instantiate(dentry, inode); | |
1098 | unlock_kernel(); | |
28de7948 | 1099 | |
1da177e4 LT |
1100 | return 0; |
1101 | } | |
1102 | ||
1103 | /* Anybody can rename anything with this: the permission checks are left to the | |
1104 | * higher-level routines. | |
1105 | */ | |
cb00ea35 CG |
1106 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1107 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1108 | { |
cb00ea35 CG |
1109 | struct inode *old_inode = old_dentry->d_inode; |
1110 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1111 | struct udf_fileident_bh ofibh, nfibh; |
28de7948 | 1112 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL, ocfi, ncfi; |
1da177e4 LT |
1113 | struct buffer_head *dir_bh = NULL; |
1114 | int retval = -ENOENT; | |
1115 | kernel_lb_addr tloc; | |
1116 | ||
1117 | lock_kernel(); | |
cb00ea35 | 1118 | if ((ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi))) { |
1da177e4 | 1119 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1120 | brelse(ofibh.ebh); |
1121 | brelse(ofibh.sbh); | |
1da177e4 LT |
1122 | } |
1123 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1124 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1125 | != old_inode->i_ino) |
1da177e4 LT |
1126 | goto end_rename; |
1127 | ||
1128 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1129 | if (nfi) { |
1130 | if (!new_inode) { | |
1da177e4 | 1131 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1132 | brelse(nfibh.ebh); |
1133 | brelse(nfibh.sbh); | |
1da177e4 LT |
1134 | nfi = NULL; |
1135 | } | |
1136 | } | |
cb00ea35 | 1137 | if (S_ISDIR(old_inode->i_mode)) { |
1da177e4 LT |
1138 | uint32_t offset = udf_ext0_offset(old_inode); |
1139 | ||
cb00ea35 | 1140 | if (new_inode) { |
1da177e4 LT |
1141 | retval = -ENOTEMPTY; |
1142 | if (!empty_dir(new_inode)) | |
1143 | goto end_rename; | |
1144 | } | |
1145 | retval = -EIO; | |
cb00ea35 | 1146 | if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 1147 | dir_fi = udf_get_fileident(UDF_I_DATA(old_inode) - |
cb00ea35 | 1148 | (UDF_I_EFE(old_inode) ? |
28de7948 | 1149 | sizeof(struct extendedFileEntry) : |
cb00ea35 | 1150 | sizeof(struct fileEntry)), |
28de7948 | 1151 | old_inode->i_sb->s_blocksize, &offset); |
cb00ea35 | 1152 | } else { |
1da177e4 LT |
1153 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1154 | if (!dir_bh) | |
1155 | goto end_rename; | |
28de7948 | 1156 | dir_fi = udf_get_fileident(dir_bh->b_data, old_inode->i_sb->s_blocksize, &offset); |
1da177e4 LT |
1157 | } |
1158 | if (!dir_fi) | |
1159 | goto end_rename; | |
1160 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
28de7948 | 1161 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != old_dir->i_ino) |
1da177e4 LT |
1162 | goto end_rename; |
1163 | ||
1164 | retval = -EMLINK; | |
28de7948 | 1165 | if (!new_inode && new_dir->i_nlink >= (256 << sizeof(new_dir->i_nlink)) - 1) |
1da177e4 LT |
1166 | goto end_rename; |
1167 | } | |
cb00ea35 | 1168 | if (!nfi) { |
28de7948 | 1169 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, &retval); |
1da177e4 LT |
1170 | if (!nfi) |
1171 | goto end_rename; | |
1172 | } | |
1173 | ||
1174 | /* | |
1175 | * Like most other Unix systems, set the ctime for inodes on a | |
1176 | * rename. | |
1177 | */ | |
1178 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1179 | mark_inode_dirty(old_inode); | |
1180 | ||
1181 | /* | |
1182 | * ok, that's it | |
1183 | */ | |
1184 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1185 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1186 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1187 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1188 | ||
1189 | /* The old fid may have moved - find it again */ | |
1190 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1191 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1192 | ||
cb00ea35 | 1193 | if (new_inode) { |
1da177e4 | 1194 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1195 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1196 | } |
1197 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1198 | mark_inode_dirty(old_dir); | |
1199 | ||
cb00ea35 | 1200 | if (dir_fi) { |
1da177e4 LT |
1201 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir)); |
1202 | udf_update_tag((char *)dir_fi, (sizeof(struct fileIdentDesc) + | |
28de7948 | 1203 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); |
cb00ea35 | 1204 | if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 1205 | mark_inode_dirty(old_inode); |
28de7948 | 1206 | } else { |
1da177e4 | 1207 | mark_buffer_dirty_inode(dir_bh, old_inode); |
28de7948 | 1208 | } |
9a53c3a7 | 1209 | inode_dec_link_count(old_dir); |
cb00ea35 | 1210 | if (new_inode) { |
9a53c3a7 | 1211 | inode_dec_link_count(new_inode); |
cb00ea35 | 1212 | } else { |
d8c76e6f | 1213 | inc_nlink(new_dir); |
1da177e4 LT |
1214 | mark_inode_dirty(new_dir); |
1215 | } | |
1216 | } | |
1217 | ||
cb00ea35 | 1218 | if (ofi) { |
1da177e4 | 1219 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1220 | brelse(ofibh.ebh); |
1221 | brelse(ofibh.sbh); | |
1da177e4 LT |
1222 | } |
1223 | ||
1224 | retval = 0; | |
1225 | ||
28de7948 | 1226 | end_rename: |
3bf25cb4 | 1227 | brelse(dir_bh); |
cb00ea35 | 1228 | if (nfi) { |
1da177e4 | 1229 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1230 | brelse(nfibh.ebh); |
1231 | brelse(nfibh.sbh); | |
1da177e4 LT |
1232 | } |
1233 | unlock_kernel(); | |
28de7948 | 1234 | |
1da177e4 LT |
1235 | return retval; |
1236 | } | |
1237 | ||
c5ef1c42 | 1238 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1239 | .lookup = udf_lookup, |
1240 | .create = udf_create, | |
1241 | .link = udf_link, | |
1242 | .unlink = udf_unlink, | |
1243 | .symlink = udf_symlink, | |
1244 | .mkdir = udf_mkdir, | |
1245 | .rmdir = udf_rmdir, | |
1246 | .mknod = udf_mknod, | |
1247 | .rename = udf_rename, | |
1da177e4 | 1248 | }; |