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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; | |
40 | return !memcmp(name1, name2, len1); | |
41 | } | |
42 | ||
43 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 CG |
44 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
45 | uint8_t * impuse, uint8_t * fileident) | |
1da177e4 LT |
46 | { |
47 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag); | |
48 | uint16_t crc; | |
49 | uint8_t checksum = 0; | |
50 | int i; | |
51 | int offset; | |
52 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
53 | uint8_t lfi = cfi->lengthFileIdent; | |
54 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
cb00ea35 | 55 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
56 | int adinicb = 0; |
57 | ||
58 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
59 | adinicb = 1; | |
60 | ||
61 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
62 | ||
cb00ea35 | 63 | if (impuse) { |
1da177e4 | 64 | if (adinicb || (offset + liu < 0)) |
cb00ea35 | 65 | memcpy((uint8_t *) sfi->impUse, impuse, liu); |
1da177e4 LT |
66 | else if (offset >= 0) |
67 | memcpy(fibh->ebh->b_data + offset, impuse, liu); | |
cb00ea35 CG |
68 | else { |
69 | memcpy((uint8_t *) sfi->impUse, impuse, -offset); | |
70 | memcpy(fibh->ebh->b_data, impuse - offset, | |
71 | liu + offset); | |
1da177e4 LT |
72 | } |
73 | } | |
74 | ||
75 | offset += liu; | |
76 | ||
cb00ea35 | 77 | if (fileident) { |
1da177e4 | 78 | if (adinicb || (offset + lfi < 0)) |
cb00ea35 CG |
79 | memcpy((uint8_t *) sfi->fileIdent + liu, fileident, |
80 | lfi); | |
1da177e4 LT |
81 | else if (offset >= 0) |
82 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); | |
cb00ea35 CG |
83 | else { |
84 | memcpy((uint8_t *) sfi->fileIdent + liu, fileident, | |
85 | -offset); | |
86 | memcpy(fibh->ebh->b_data, fileident - offset, | |
87 | lfi + offset); | |
1da177e4 LT |
88 | } |
89 | } | |
90 | ||
91 | offset += lfi; | |
92 | ||
93 | if (adinicb || (offset + padlen < 0)) | |
cb00ea35 | 94 | memset((uint8_t *) sfi->padding + liu + lfi, 0x00, padlen); |
1da177e4 LT |
95 | else if (offset >= 0) |
96 | memset(fibh->ebh->b_data + offset, 0x00, padlen); | |
cb00ea35 CG |
97 | else { |
98 | memset((uint8_t *) sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
99 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
100 | } | |
101 | ||
cb00ea35 CG |
102 | crc = |
103 | udf_crc((uint8_t *) cfi + sizeof(tag), | |
104 | sizeof(struct fileIdentDesc) - sizeof(tag), 0); | |
1da177e4 LT |
105 | |
106 | if (fibh->sbh == fibh->ebh) | |
cb00ea35 CG |
107 | crc = udf_crc((uint8_t *) sfi->impUse, |
108 | crclen + sizeof(tag) - | |
109 | sizeof(struct fileIdentDesc), crc); | |
1da177e4 | 110 | else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) |
cb00ea35 CG |
111 | crc = |
112 | udf_crc(fibh->ebh->b_data + sizeof(struct fileIdentDesc) + | |
113 | fibh->soffset, | |
114 | crclen + sizeof(tag) - sizeof(struct fileIdentDesc), | |
115 | crc); | |
116 | else { | |
117 | crc = udf_crc((uint8_t *) sfi->impUse, | |
118 | -fibh->soffset - sizeof(struct fileIdentDesc), | |
119 | crc); | |
1da177e4 LT |
120 | crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc); |
121 | } | |
122 | ||
123 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
124 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
125 | ||
cb00ea35 | 126 | for (i = 0; i < 16; i++) |
1da177e4 | 127 | if (i != 4) |
cb00ea35 | 128 | checksum += ((uint8_t *) & cfi->descTag)[i]; |
1da177e4 LT |
129 | |
130 | cfi->descTag.tagChecksum = checksum; | |
131 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) | |
cb00ea35 CG |
132 | memcpy((uint8_t *) sfi, (uint8_t *) cfi, |
133 | sizeof(struct fileIdentDesc)); | |
134 | else { | |
135 | memcpy((uint8_t *) sfi, (uint8_t *) cfi, -fibh->soffset); | |
136 | memcpy(fibh->ebh->b_data, (uint8_t *) cfi - fibh->soffset, | |
137 | sizeof(struct fileIdentDesc) + fibh->soffset); | |
1da177e4 LT |
138 | } |
139 | ||
140 | if (adinicb) | |
141 | mark_inode_dirty(inode); | |
cb00ea35 | 142 | else { |
1da177e4 LT |
143 | if (fibh->sbh != fibh->ebh) |
144 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
145 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
146 | } | |
147 | return 0; | |
148 | } | |
149 | ||
cb00ea35 CG |
150 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
151 | struct dentry *dentry, | |
152 | struct udf_fileident_bh *fibh, | |
153 | struct fileIdentDesc *cfi) | |
1da177e4 | 154 | { |
cb00ea35 | 155 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
156 | loff_t f_pos; |
157 | int block, flen; | |
158 | char fname[UDF_NAME_LEN]; | |
159 | char *nameptr; | |
160 | uint8_t lfi; | |
161 | uint16_t liu; | |
ec471dc4 | 162 | loff_t size; |
ff116fc8 JK |
163 | kernel_lb_addr eloc; |
164 | uint32_t elen; | |
60448b1d | 165 | sector_t offset; |
cb00ea35 | 166 | struct extent_position epos = { NULL, 0, {0, 0} }; |
1da177e4 | 167 | |
ec471dc4 | 168 | size = (udf_ext0_offset(dir) + dir->i_size) >> 2; |
1da177e4 LT |
169 | f_pos = (udf_ext0_offset(dir) >> 2); |
170 | ||
cb00ea35 CG |
171 | fibh->soffset = fibh->eoffset = |
172 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
1da177e4 LT |
173 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) |
174 | fibh->sbh = fibh->ebh = NULL; | |
175 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), | |
cb00ea35 CG |
176 | &epos, &eloc, &elen, |
177 | &offset) == (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 178 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 179 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 180 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 181 | epos.offset -= sizeof(short_ad); |
1da177e4 | 182 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 183 | epos.offset -= sizeof(long_ad); |
cb00ea35 | 184 | } else |
1da177e4 LT |
185 | offset = 0; |
186 | ||
cb00ea35 | 187 | if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block))) { |
3bf25cb4 | 188 | brelse(epos.bh); |
1da177e4 LT |
189 | return NULL; |
190 | } | |
cb00ea35 | 191 | } else { |
3bf25cb4 | 192 | brelse(epos.bh); |
1da177e4 LT |
193 | return NULL; |
194 | } | |
195 | ||
cb00ea35 CG |
196 | while ((f_pos < size)) { |
197 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, | |
198 | &elen, &offset); | |
1da177e4 | 199 | |
cb00ea35 | 200 | if (!fi) { |
1da177e4 | 201 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
202 | brelse(fibh->ebh); |
203 | brelse(fibh->sbh); | |
204 | brelse(epos.bh); | |
1da177e4 LT |
205 | return NULL; |
206 | } | |
207 | ||
208 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
209 | lfi = cfi->lengthFileIdent; | |
210 | ||
cb00ea35 | 211 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 212 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 213 | } else { |
1da177e4 LT |
214 | int poffset; /* Unpaded ending offset */ |
215 | ||
cb00ea35 CG |
216 | poffset = |
217 | fibh->soffset + sizeof(struct fileIdentDesc) + liu + | |
218 | lfi; | |
1da177e4 LT |
219 | |
220 | if (poffset >= lfi) | |
cb00ea35 CG |
221 | nameptr = |
222 | (uint8_t *) (fibh->ebh->b_data + poffset - | |
223 | lfi); | |
224 | else { | |
1da177e4 | 225 | nameptr = fname; |
cb00ea35 CG |
226 | memcpy(nameptr, fi->fileIdent + liu, |
227 | lfi - poffset); | |
228 | memcpy(nameptr + lfi - poffset, | |
229 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
230 | } |
231 | } | |
232 | ||
cb00ea35 CG |
233 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
234 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
235 | continue; |
236 | } | |
cb00ea35 CG |
237 | |
238 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
239 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
240 | continue; |
241 | } | |
242 | ||
243 | if (!lfi) | |
244 | continue; | |
245 | ||
cb00ea35 CG |
246 | if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi))) { |
247 | if (udf_match | |
248 | (flen, fname, dentry->d_name.len, | |
249 | dentry->d_name.name)) { | |
3bf25cb4 | 250 | brelse(epos.bh); |
1da177e4 LT |
251 | return fi; |
252 | } | |
253 | } | |
254 | } | |
255 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
256 | brelse(fibh->ebh); |
257 | brelse(fibh->sbh); | |
258 | brelse(epos.bh); | |
1da177e4 LT |
259 | return NULL; |
260 | } | |
261 | ||
262 | /* | |
263 | * udf_lookup | |
264 | * | |
265 | * PURPOSE | |
266 | * Look-up the inode for a given name. | |
267 | * | |
268 | * DESCRIPTION | |
269 | * Required - lookup_dentry() will return -ENOTDIR if this routine is not | |
270 | * available for a directory. The filesystem is useless if this routine is | |
271 | * not available for at least the filesystem's root directory. | |
272 | * | |
273 | * This routine is passed an incomplete dentry - it must be completed by | |
274 | * calling d_add(dentry, inode). If the name does not exist, then the | |
275 | * specified inode must be set to null. An error should only be returned | |
276 | * when the lookup fails for a reason other than the name not existing. | |
277 | * Note that the directory inode semaphore is held during the call. | |
278 | * | |
279 | * Refer to lookup_dentry() in fs/namei.c | |
280 | * lookup_dentry() -> lookup() -> real_lookup() -> . | |
281 | * | |
282 | * PRE-CONDITIONS | |
283 | * dir Pointer to inode of parent directory. | |
284 | * dentry Pointer to dentry to complete. | |
285 | * nd Pointer to lookup nameidata | |
286 | * | |
287 | * POST-CONDITIONS | |
288 | * <return> Zero on success. | |
289 | * | |
290 | * HISTORY | |
291 | * July 1, 1997 - Andrew E. Mileski | |
292 | * Written, tested, and released. | |
293 | */ | |
294 | ||
cb00ea35 CG |
295 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
296 | struct nameidata *nd) | |
1da177e4 LT |
297 | { |
298 | struct inode *inode = NULL; | |
db9a369e | 299 | struct fileIdentDesc cfi; |
1da177e4 LT |
300 | struct udf_fileident_bh fibh; |
301 | ||
cb00ea35 | 302 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
303 | return ERR_PTR(-ENAMETOOLONG); |
304 | ||
305 | lock_kernel(); | |
306 | #ifdef UDF_RECOVERY | |
307 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 CG |
308 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
309 | kernel_lb_addr lb = | |
310 | { 0, simple_strtoul(dentry->d_name.name + 3, NULL, 0) }; | |
1da177e4 | 311 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 312 | if (!inode) { |
1da177e4 LT |
313 | unlock_kernel(); |
314 | return ERR_PTR(-EACCES); | |
315 | } | |
cb00ea35 CG |
316 | } else |
317 | #endif /* UDF_RECOVERY */ | |
1da177e4 | 318 | |
cb00ea35 | 319 | if (udf_find_entry(dir, dentry, &fibh, &cfi)) { |
1da177e4 | 320 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
321 | brelse(fibh.ebh); |
322 | brelse(fibh.sbh); | |
1da177e4 LT |
323 | |
324 | inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); | |
cb00ea35 | 325 | if (!inode) { |
1da177e4 LT |
326 | unlock_kernel(); |
327 | return ERR_PTR(-EACCES); | |
328 | } | |
329 | } | |
330 | unlock_kernel(); | |
331 | d_add(dentry, inode); | |
332 | return NULL; | |
333 | } | |
334 | ||
cb00ea35 CG |
335 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
336 | struct dentry *dentry, | |
337 | struct udf_fileident_bh *fibh, | |
338 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 LT |
339 | { |
340 | struct super_block *sb; | |
cb00ea35 | 341 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
342 | char name[UDF_NAME_LEN], fname[UDF_NAME_LEN]; |
343 | int namelen; | |
344 | loff_t f_pos; | |
345 | int flen; | |
346 | char *nameptr; | |
347 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
348 | int nfidlen; | |
349 | uint8_t lfi; | |
350 | uint16_t liu; | |
351 | int block; | |
ff116fc8 JK |
352 | kernel_lb_addr eloc; |
353 | uint32_t elen; | |
60448b1d | 354 | sector_t offset; |
cb00ea35 | 355 | struct extent_position epos = { NULL, 0, {0, 0} }; |
1da177e4 LT |
356 | |
357 | sb = dir->i_sb; | |
358 | ||
cb00ea35 CG |
359 | if (dentry) { |
360 | if (!dentry->d_name.len) { | |
1da177e4 LT |
361 | *err = -EINVAL; |
362 | return NULL; | |
363 | } | |
364 | ||
cb00ea35 CG |
365 | if (! |
366 | (namelen = | |
367 | udf_put_filename(sb, dentry->d_name.name, name, | |
368 | dentry->d_name.len))) { | |
1da177e4 LT |
369 | *err = -ENAMETOOLONG; |
370 | return NULL; | |
371 | } | |
cb00ea35 | 372 | } else |
1da177e4 LT |
373 | namelen = 0; |
374 | ||
375 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
376 | ||
377 | f_pos = (udf_ext0_offset(dir) >> 2); | |
378 | ||
cb00ea35 CG |
379 | fibh->soffset = fibh->eoffset = |
380 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
1da177e4 LT |
381 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) |
382 | fibh->sbh = fibh->ebh = NULL; | |
383 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), | |
cb00ea35 CG |
384 | &epos, &eloc, &elen, |
385 | &offset) == (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 386 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 387 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 388 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 389 | epos.offset -= sizeof(short_ad); |
1da177e4 | 390 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 391 | epos.offset -= sizeof(long_ad); |
cb00ea35 | 392 | } else |
1da177e4 LT |
393 | offset = 0; |
394 | ||
cb00ea35 | 395 | if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block))) { |
3bf25cb4 | 396 | brelse(epos.bh); |
1da177e4 LT |
397 | *err = -EIO; |
398 | return NULL; | |
399 | } | |
400 | ||
401 | block = UDF_I_LOCATION(dir).logicalBlockNum; | |
402 | ||
cb00ea35 | 403 | } else { |
1da177e4 LT |
404 | block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0); |
405 | fibh->sbh = fibh->ebh = NULL; | |
406 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
407 | goto add; | |
408 | } | |
409 | ||
cb00ea35 CG |
410 | while ((f_pos < size)) { |
411 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, | |
412 | &elen, &offset); | |
1da177e4 | 413 | |
cb00ea35 | 414 | if (!fi) { |
1da177e4 | 415 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
416 | brelse(fibh->ebh); |
417 | brelse(fibh->sbh); | |
418 | brelse(epos.bh); | |
1da177e4 LT |
419 | *err = -EIO; |
420 | return NULL; | |
421 | } | |
422 | ||
423 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
424 | lfi = cfi->lengthFileIdent; | |
425 | ||
426 | if (fibh->sbh == fibh->ebh) | |
427 | nameptr = fi->fileIdent + liu; | |
cb00ea35 | 428 | else { |
1da177e4 LT |
429 | int poffset; /* Unpaded ending offset */ |
430 | ||
cb00ea35 CG |
431 | poffset = |
432 | fibh->soffset + sizeof(struct fileIdentDesc) + liu + | |
433 | lfi; | |
1da177e4 LT |
434 | |
435 | if (poffset >= lfi) | |
cb00ea35 CG |
436 | nameptr = |
437 | (char *)(fibh->ebh->b_data + poffset - lfi); | |
438 | else { | |
1da177e4 | 439 | nameptr = fname; |
cb00ea35 CG |
440 | memcpy(nameptr, fi->fileIdent + liu, |
441 | lfi - poffset); | |
442 | memcpy(nameptr + lfi - poffset, | |
443 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
444 | } |
445 | } | |
446 | ||
cb00ea35 CG |
447 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
448 | if (((sizeof(struct fileIdentDesc) + liu + lfi + | |
449 | 3) & ~3) == nfidlen) { | |
3bf25cb4 | 450 | brelse(epos.bh); |
1da177e4 LT |
451 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
452 | cfi->fileVersionNum = cpu_to_le16(1); | |
453 | cfi->fileCharacteristics = 0; | |
454 | cfi->lengthFileIdent = namelen; | |
455 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 CG |
456 | if (!udf_write_fi |
457 | (dir, cfi, fi, fibh, NULL, name)) | |
1da177e4 | 458 | return fi; |
cb00ea35 | 459 | else { |
1da177e4 LT |
460 | *err = -EIO; |
461 | return NULL; | |
462 | } | |
463 | } | |
464 | } | |
465 | ||
466 | if (!lfi || !dentry) | |
467 | continue; | |
468 | ||
469 | if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)) && | |
cb00ea35 CG |
470 | udf_match(flen, fname, dentry->d_name.len, |
471 | dentry->d_name.name)) { | |
1da177e4 | 472 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
473 | brelse(fibh->ebh); |
474 | brelse(fibh->sbh); | |
475 | brelse(epos.bh); | |
1da177e4 LT |
476 | *err = -EEXIST; |
477 | return NULL; | |
478 | } | |
479 | } | |
480 | ||
cb00ea35 | 481 | add: |
1da177e4 LT |
482 | f_pos += nfidlen; |
483 | ||
484 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB && | |
cb00ea35 | 485 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 486 | brelse(epos.bh); |
ff116fc8 | 487 | epos.bh = NULL; |
1da177e4 LT |
488 | fibh->soffset -= udf_ext0_offset(dir); |
489 | fibh->eoffset -= udf_ext0_offset(dir); | |
490 | f_pos -= (udf_ext0_offset(dir) >> 2); | |
491 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
492 | brelse(fibh->ebh); |
493 | brelse(fibh->sbh); | |
cb00ea35 CG |
494 | if (! |
495 | (fibh->sbh = fibh->ebh = | |
496 | udf_expand_dir_adinicb(dir, &block, err))) | |
1da177e4 | 497 | return NULL; |
ff116fc8 | 498 | epos.block = UDF_I_LOCATION(dir); |
1da177e4 | 499 | eloc.logicalBlockNum = block; |
cb00ea35 CG |
500 | eloc.partitionReferenceNum = |
501 | UDF_I_LOCATION(dir).partitionReferenceNum; | |
1da177e4 | 502 | elen = dir->i_sb->s_blocksize; |
ff116fc8 | 503 | epos.offset = udf_file_entry_alloc_offset(dir); |
1da177e4 | 504 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 505 | epos.offset += sizeof(short_ad); |
1da177e4 | 506 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 507 | epos.offset += sizeof(long_ad); |
1da177e4 LT |
508 | } |
509 | ||
cb00ea35 | 510 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
511 | fibh->soffset = fibh->eoffset; |
512 | fibh->eoffset += nfidlen; | |
cb00ea35 | 513 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 514 | brelse(fibh->sbh); |
1da177e4 LT |
515 | fibh->sbh = fibh->ebh; |
516 | } | |
517 | ||
cb00ea35 | 518 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 519 | block = UDF_I_LOCATION(dir).logicalBlockNum; |
cb00ea35 CG |
520 | fi = (struct fileIdentDesc *)(UDF_I_DATA(dir) + |
521 | fibh->soffset - | |
522 | udf_ext0_offset(dir) + | |
523 | UDF_I_LENEATTR(dir)); | |
524 | } else { | |
1da177e4 | 525 | block = eloc.logicalBlockNum + ((elen - 1) >> |
cb00ea35 CG |
526 | dir->i_sb-> |
527 | s_blocksize_bits); | |
528 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data + | |
529 | fibh->soffset); | |
1da177e4 | 530 | } |
cb00ea35 | 531 | } else { |
1da177e4 LT |
532 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
533 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 534 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 535 | brelse(fibh->sbh); |
1da177e4 LT |
536 | fibh->sbh = fibh->ebh; |
537 | } | |
538 | ||
539 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 540 | dir->i_sb->s_blocksize_bits); |
1da177e4 | 541 | |
cb00ea35 CG |
542 | if (! |
543 | (fibh->ebh = | |
544 | udf_bread(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), | |
545 | 1, err))) { | |
3bf25cb4 JK |
546 | brelse(epos.bh); |
547 | brelse(fibh->sbh); | |
1da177e4 LT |
548 | return NULL; |
549 | } | |
550 | ||
cb00ea35 | 551 | if (!(fibh->soffset)) { |
ff116fc8 | 552 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 553 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 554 | block = eloc.logicalBlockNum + ((elen - 1) >> |
cb00ea35 CG |
555 | dir->i_sb-> |
556 | s_blocksize_bits); | |
557 | } else | |
558 | block++; | |
1da177e4 | 559 | |
3bf25cb4 | 560 | brelse(fibh->sbh); |
1da177e4 LT |
561 | fibh->sbh = fibh->ebh; |
562 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 563 | } else { |
1da177e4 | 564 | fi = (struct fileIdentDesc *) |
cb00ea35 CG |
565 | (fibh->sbh->b_data + sb->s_blocksize + |
566 | fibh->soffset); | |
1da177e4 LT |
567 | } |
568 | } | |
569 | ||
570 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
571 | if (UDF_SB_UDFREV(sb) >= 0x0200) | |
cb00ea35 CG |
572 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
573 | sizeof(tag)); | |
1da177e4 | 574 | else |
cb00ea35 CG |
575 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
576 | sizeof(tag)); | |
1da177e4 LT |
577 | cfi->fileVersionNum = cpu_to_le16(1); |
578 | cfi->lengthFileIdent = namelen; | |
579 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 580 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
3bf25cb4 | 581 | brelse(epos.bh); |
1da177e4 LT |
582 | dir->i_size += nfidlen; |
583 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
584 | UDF_I_LENALLOC(dir) += nfidlen; | |
585 | mark_inode_dirty(dir); | |
586 | return fi; | |
cb00ea35 | 587 | } else { |
3bf25cb4 | 588 | brelse(epos.bh); |
1da177e4 | 589 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
590 | brelse(fibh->ebh); |
591 | brelse(fibh->sbh); | |
1da177e4 LT |
592 | *err = -EIO; |
593 | return NULL; | |
594 | } | |
595 | } | |
596 | ||
597 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
598 | struct udf_fileident_bh *fibh, |
599 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
600 | { |
601 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
602 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
603 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
604 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); | |
605 | } | |
606 | ||
cb00ea35 CG |
607 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
608 | struct nameidata *nd) | |
1da177e4 LT |
609 | { |
610 | struct udf_fileident_bh fibh; | |
611 | struct inode *inode; | |
612 | struct fileIdentDesc cfi, *fi; | |
613 | int err; | |
614 | ||
615 | lock_kernel(); | |
616 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 617 | if (!inode) { |
1da177e4 LT |
618 | unlock_kernel(); |
619 | return err; | |
620 | } | |
621 | ||
622 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
623 | inode->i_data.a_ops = &udf_adinicb_aops; | |
624 | else | |
625 | inode->i_data.a_ops = &udf_aops; | |
626 | inode->i_op = &udf_file_inode_operations; | |
627 | inode->i_fop = &udf_file_operations; | |
628 | inode->i_mode = mode; | |
629 | mark_inode_dirty(inode); | |
630 | ||
cb00ea35 CG |
631 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
632 | inode->i_nlink--; | |
1da177e4 LT |
633 | mark_inode_dirty(inode); |
634 | iput(inode); | |
635 | unlock_kernel(); | |
636 | return err; | |
637 | } | |
638 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
639 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
cb00ea35 CG |
640 | *(__le32 *) ((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
641 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 | 642 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
cb00ea35 | 643 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
644 | mark_inode_dirty(dir); |
645 | } | |
646 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
647 | brelse(fibh.ebh); |
648 | brelse(fibh.sbh); | |
1da177e4 LT |
649 | unlock_kernel(); |
650 | d_instantiate(dentry, inode); | |
651 | return 0; | |
652 | } | |
653 | ||
cb00ea35 CG |
654 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
655 | dev_t rdev) | |
1da177e4 | 656 | { |
cb00ea35 | 657 | struct inode *inode; |
1da177e4 LT |
658 | struct udf_fileident_bh fibh; |
659 | struct fileIdentDesc cfi, *fi; | |
660 | int err; | |
661 | ||
662 | if (!old_valid_dev(rdev)) | |
663 | return -EINVAL; | |
664 | ||
665 | lock_kernel(); | |
666 | err = -EIO; | |
667 | inode = udf_new_inode(dir, mode, &err); | |
668 | if (!inode) | |
669 | goto out; | |
670 | ||
671 | inode->i_uid = current->fsuid; | |
672 | init_special_inode(inode, mode, rdev); | |
cb00ea35 CG |
673 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
674 | inode->i_nlink--; | |
1da177e4 LT |
675 | mark_inode_dirty(inode); |
676 | iput(inode); | |
677 | unlock_kernel(); | |
678 | return err; | |
679 | } | |
680 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
681 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
cb00ea35 CG |
682 | *(__le32 *) ((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
683 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 | 684 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
cb00ea35 | 685 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
686 | mark_inode_dirty(dir); |
687 | } | |
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; | |
cb00ea35 | 695 | out: |
1da177e4 LT |
696 | unlock_kernel(); |
697 | return err; | |
698 | } | |
699 | ||
cb00ea35 | 700 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 701 | { |
cb00ea35 | 702 | struct inode *inode; |
1da177e4 LT |
703 | struct udf_fileident_bh fibh; |
704 | struct fileIdentDesc cfi, *fi; | |
705 | int err; | |
706 | ||
707 | lock_kernel(); | |
708 | err = -EMLINK; | |
cb00ea35 | 709 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
710 | goto out; |
711 | ||
712 | err = -EIO; | |
713 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
714 | if (!inode) | |
715 | goto out; | |
716 | ||
717 | inode->i_op = &udf_dir_inode_operations; | |
718 | inode->i_fop = &udf_dir_operations; | |
cb00ea35 | 719 | if (!(fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err))) { |
1da177e4 LT |
720 | inode->i_nlink--; |
721 | mark_inode_dirty(inode); | |
722 | iput(inode); | |
723 | goto out; | |
724 | } | |
725 | inode->i_nlink = 2; | |
726 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
727 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir)); | |
cb00ea35 CG |
728 | *(__le32 *) ((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
729 | cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL); | |
730 | cfi.fileCharacteristics = | |
731 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 732 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 733 | brelse(fibh.sbh); |
1da177e4 LT |
734 | inode->i_mode = S_IFDIR | mode; |
735 | if (dir->i_mode & S_ISGID) | |
736 | inode->i_mode |= S_ISGID; | |
737 | mark_inode_dirty(inode); | |
738 | ||
cb00ea35 | 739 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
1da177e4 LT |
740 | inode->i_nlink = 0; |
741 | mark_inode_dirty(inode); | |
742 | iput(inode); | |
743 | goto out; | |
744 | } | |
745 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
746 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
cb00ea35 CG |
747 | *(__le32 *) ((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
748 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
749 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
750 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 751 | inc_nlink(dir); |
1da177e4 LT |
752 | mark_inode_dirty(dir); |
753 | d_instantiate(dentry, inode); | |
754 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
755 | brelse(fibh.ebh); |
756 | brelse(fibh.sbh); | |
1da177e4 | 757 | err = 0; |
cb00ea35 | 758 | out: |
1da177e4 LT |
759 | unlock_kernel(); |
760 | return err; | |
761 | } | |
762 | ||
763 | static int empty_dir(struct inode *dir) | |
764 | { | |
765 | struct fileIdentDesc *fi, cfi; | |
766 | struct udf_fileident_bh fibh; | |
767 | loff_t f_pos; | |
768 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
769 | int block; | |
ff116fc8 JK |
770 | kernel_lb_addr eloc; |
771 | uint32_t elen; | |
60448b1d | 772 | sector_t offset; |
cb00ea35 | 773 | struct extent_position epos = { NULL, 0, {0, 0} }; |
1da177e4 LT |
774 | |
775 | f_pos = (udf_ext0_offset(dir) >> 2); | |
776 | ||
cb00ea35 CG |
777 | fibh.soffset = fibh.eoffset = |
778 | (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; | |
1da177e4 LT |
779 | |
780 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
781 | fibh.sbh = fibh.ebh = NULL; | |
782 | else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), | |
cb00ea35 CG |
783 | &epos, &eloc, &elen, |
784 | &offset) == (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 785 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 786 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 787 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 788 | epos.offset -= sizeof(short_ad); |
1da177e4 | 789 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 790 | epos.offset -= sizeof(long_ad); |
cb00ea35 | 791 | } else |
1da177e4 LT |
792 | offset = 0; |
793 | ||
cb00ea35 | 794 | if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block))) { |
3bf25cb4 | 795 | brelse(epos.bh); |
1da177e4 LT |
796 | return 0; |
797 | } | |
cb00ea35 | 798 | } else { |
3bf25cb4 | 799 | brelse(epos.bh); |
1da177e4 LT |
800 | return 0; |
801 | } | |
802 | ||
cb00ea35 CG |
803 | while ((f_pos < size)) { |
804 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, | |
805 | &elen, &offset); | |
1da177e4 | 806 | |
cb00ea35 | 807 | if (!fi) { |
1da177e4 | 808 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
809 | brelse(fibh.ebh); |
810 | brelse(fibh.sbh); | |
811 | brelse(epos.bh); | |
1da177e4 LT |
812 | return 0; |
813 | } | |
814 | ||
cb00ea35 CG |
815 | if (cfi.lengthFileIdent |
816 | && (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 817 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
818 | brelse(fibh.ebh); |
819 | brelse(fibh.sbh); | |
820 | brelse(epos.bh); | |
1da177e4 LT |
821 | return 0; |
822 | } | |
823 | } | |
824 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
825 | brelse(fibh.ebh); |
826 | brelse(fibh.sbh); | |
827 | brelse(epos.bh); | |
1da177e4 LT |
828 | return 1; |
829 | } | |
830 | ||
cb00ea35 | 831 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
832 | { |
833 | int retval; | |
cb00ea35 | 834 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
835 | struct udf_fileident_bh fibh; |
836 | struct fileIdentDesc *fi, cfi; | |
837 | kernel_lb_addr tloc; | |
838 | ||
839 | retval = -ENOENT; | |
840 | lock_kernel(); | |
841 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
842 | if (!fi) | |
843 | goto out; | |
844 | ||
845 | retval = -EIO; | |
846 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
847 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
848 | goto end_rmdir; | |
849 | retval = -ENOTEMPTY; | |
850 | if (!empty_dir(inode)) | |
851 | goto end_rmdir; | |
852 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
853 | if (retval) | |
854 | goto end_rmdir; | |
855 | if (inode->i_nlink != 2) | |
856 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
857 | "empty directory has nlink != 2 (%d)", |
858 | inode->i_nlink); | |
ce71ec36 | 859 | clear_nlink(inode); |
1da177e4 | 860 | inode->i_size = 0; |
c007c06e | 861 | inode_dec_link_count(dir); |
cb00ea35 CG |
862 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
863 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
864 | mark_inode_dirty(dir); |
865 | ||
cb00ea35 | 866 | end_rmdir: |
1da177e4 | 867 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
868 | brelse(fibh.ebh); |
869 | brelse(fibh.sbh); | |
cb00ea35 | 870 | out: |
1da177e4 LT |
871 | unlock_kernel(); |
872 | return retval; | |
873 | } | |
874 | ||
cb00ea35 | 875 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
876 | { |
877 | int retval; | |
cb00ea35 | 878 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
879 | struct udf_fileident_bh fibh; |
880 | struct fileIdentDesc *fi; | |
881 | struct fileIdentDesc cfi; | |
882 | kernel_lb_addr tloc; | |
883 | ||
884 | retval = -ENOENT; | |
885 | lock_kernel(); | |
886 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
887 | if (!fi) | |
888 | goto out; | |
889 | ||
890 | retval = -EIO; | |
891 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
892 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
893 | goto end_unlink; | |
894 | ||
cb00ea35 | 895 | if (!inode->i_nlink) { |
1da177e4 | 896 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 897 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
898 | inode->i_nlink = 1; |
899 | } | |
900 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
901 | if (retval) | |
902 | goto end_unlink; | |
903 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
904 | mark_inode_dirty(dir); | |
9a53c3a7 | 905 | inode_dec_link_count(inode); |
1da177e4 LT |
906 | inode->i_ctime = dir->i_ctime; |
907 | retval = 0; | |
908 | ||
cb00ea35 | 909 | end_unlink: |
1da177e4 | 910 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
911 | brelse(fibh.ebh); |
912 | brelse(fibh.sbh); | |
cb00ea35 | 913 | out: |
1da177e4 LT |
914 | unlock_kernel(); |
915 | return retval; | |
916 | } | |
917 | ||
cb00ea35 CG |
918 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
919 | const char *symname) | |
1da177e4 | 920 | { |
cb00ea35 | 921 | struct inode *inode; |
1da177e4 LT |
922 | struct pathComponent *pc; |
923 | char *compstart; | |
924 | struct udf_fileident_bh fibh; | |
cb00ea35 | 925 | struct extent_position epos = { NULL, 0, {0, 0} }; |
1da177e4 LT |
926 | int eoffset, elen = 0; |
927 | struct fileIdentDesc *fi; | |
928 | struct fileIdentDesc cfi; | |
929 | char *ea; | |
930 | int err; | |
931 | int block; | |
932 | char name[UDF_NAME_LEN]; | |
933 | int namelen; | |
934 | ||
935 | lock_kernel(); | |
936 | if (!(inode = udf_new_inode(dir, S_IFLNK, &err))) | |
937 | goto out; | |
938 | ||
939 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
940 | inode->i_data.a_ops = &udf_symlink_aops; | |
941 | inode->i_op = &page_symlink_inode_operations; | |
942 | ||
cb00ea35 | 943 | if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 JK |
944 | kernel_lb_addr eloc; |
945 | uint32_t elen; | |
1da177e4 LT |
946 | |
947 | block = udf_new_block(inode->i_sb, inode, | |
cb00ea35 CG |
948 | UDF_I_LOCATION(inode). |
949 | partitionReferenceNum, | |
950 | UDF_I_LOCATION(inode).logicalBlockNum, | |
951 | &err); | |
1da177e4 LT |
952 | if (!block) |
953 | goto out_no_entry; | |
ff116fc8 JK |
954 | epos.block = UDF_I_LOCATION(inode); |
955 | epos.offset = udf_file_entry_alloc_offset(inode); | |
956 | epos.bh = NULL; | |
1da177e4 | 957 | eloc.logicalBlockNum = block; |
cb00ea35 CG |
958 | eloc.partitionReferenceNum = |
959 | UDF_I_LOCATION(inode).partitionReferenceNum; | |
1da177e4 LT |
960 | elen = inode->i_sb->s_blocksize; |
961 | UDF_I_LENEXTENTS(inode) = elen; | |
ff116fc8 | 962 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 963 | brelse(epos.bh); |
1da177e4 LT |
964 | |
965 | block = udf_get_pblock(inode->i_sb, block, | |
cb00ea35 CG |
966 | UDF_I_LOCATION(inode). |
967 | partitionReferenceNum, 0); | |
ff116fc8 JK |
968 | epos.bh = udf_tread(inode->i_sb, block); |
969 | lock_buffer(epos.bh); | |
970 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
971 | set_buffer_uptodate(epos.bh); | |
972 | unlock_buffer(epos.bh); | |
973 | mark_buffer_dirty_inode(epos.bh, inode); | |
974 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
cb00ea35 | 975 | } else |
1da177e4 LT |
976 | ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode); |
977 | ||
978 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
979 | pc = (struct pathComponent *)ea; | |
980 | ||
cb00ea35 CG |
981 | if (*symname == '/') { |
982 | do { | |
1da177e4 LT |
983 | symname++; |
984 | } while (*symname == '/'); | |
985 | ||
986 | pc->componentType = 1; | |
987 | pc->lengthComponentIdent = 0; | |
988 | pc->componentFileVersionNum = 0; | |
989 | pc += sizeof(struct pathComponent); | |
990 | elen += sizeof(struct pathComponent); | |
991 | } | |
992 | ||
993 | err = -ENAMETOOLONG; | |
994 | ||
cb00ea35 | 995 | while (*symname) { |
1da177e4 LT |
996 | if (elen + sizeof(struct pathComponent) > eoffset) |
997 | goto out_no_entry; | |
998 | ||
999 | pc = (struct pathComponent *)(ea + elen); | |
1000 | ||
1001 | compstart = (char *)symname; | |
1002 | ||
cb00ea35 | 1003 | do { |
1da177e4 LT |
1004 | symname++; |
1005 | } while (*symname && *symname != '/'); | |
1006 | ||
1007 | pc->componentType = 5; | |
1008 | pc->lengthComponentIdent = 0; | |
1009 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
1010 | if (compstart[0] == '.') { |
1011 | if ((symname - compstart) == 1) | |
1da177e4 | 1012 | pc->componentType = 4; |
cb00ea35 CG |
1013 | else if ((symname - compstart) == 2 |
1014 | && compstart[1] == '.') | |
1da177e4 LT |
1015 | pc->componentType = 3; |
1016 | } | |
1017 | ||
cb00ea35 CG |
1018 | if (pc->componentType == 5) { |
1019 | if (! | |
1020 | (namelen = | |
1021 | udf_put_filename(inode->i_sb, compstart, name, | |
1022 | symname - compstart))) | |
1da177e4 LT |
1023 | goto out_no_entry; |
1024 | ||
cb00ea35 CG |
1025 | if (elen + sizeof(struct pathComponent) + namelen > |
1026 | eoffset) | |
1da177e4 LT |
1027 | goto out_no_entry; |
1028 | else | |
1029 | pc->lengthComponentIdent = namelen; | |
1030 | ||
1031 | memcpy(pc->componentIdent, name, namelen); | |
1032 | } | |
1033 | ||
1034 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1035 | ||
cb00ea35 CG |
1036 | if (*symname) { |
1037 | do { | |
1da177e4 LT |
1038 | symname++; |
1039 | } while (*symname == '/'); | |
1040 | } | |
1041 | } | |
1042 | ||
3bf25cb4 | 1043 | brelse(epos.bh); |
1da177e4 LT |
1044 | inode->i_size = elen; |
1045 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
1046 | UDF_I_LENALLOC(inode) = inode->i_size; | |
1047 | mark_inode_dirty(inode); | |
1048 | ||
1049 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) | |
1050 | goto out_no_entry; | |
1051 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
1052 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
cb00ea35 | 1053 | if (UDF_SB_LVIDBH(inode->i_sb)) { |
1da177e4 LT |
1054 | struct logicalVolHeaderDesc *lvhd; |
1055 | uint64_t uniqueID; | |
cb00ea35 CG |
1056 | lvhd = |
1057 | (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)-> | |
1058 | logicalVolContentsUse); | |
1da177e4 | 1059 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
cb00ea35 CG |
1060 | *(__le32 *) ((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1061 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1062 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1063 | uniqueID += 16; | |
1064 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1065 | mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb)); | |
1066 | } | |
1067 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
cb00ea35 | 1068 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
1069 | mark_inode_dirty(dir); |
1070 | } | |
1071 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
1072 | brelse(fibh.ebh); |
1073 | brelse(fibh.sbh); | |
1da177e4 LT |
1074 | d_instantiate(dentry, inode); |
1075 | err = 0; | |
1076 | ||
cb00ea35 | 1077 | out: |
1da177e4 LT |
1078 | unlock_kernel(); |
1079 | return err; | |
1080 | ||
cb00ea35 | 1081 | out_no_entry: |
9a53c3a7 | 1082 | inode_dec_link_count(inode); |
1da177e4 LT |
1083 | iput(inode); |
1084 | goto out; | |
1085 | } | |
1086 | ||
cb00ea35 CG |
1087 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1088 | struct dentry *dentry) | |
1da177e4 LT |
1089 | { |
1090 | struct inode *inode = old_dentry->d_inode; | |
1091 | struct udf_fileident_bh fibh; | |
1092 | struct fileIdentDesc cfi, *fi; | |
1093 | int err; | |
1094 | ||
1095 | lock_kernel(); | |
cb00ea35 | 1096 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1097 | unlock_kernel(); |
1098 | return -EMLINK; | |
1099 | } | |
1100 | ||
cb00ea35 | 1101 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
1da177e4 LT |
1102 | unlock_kernel(); |
1103 | return err; | |
1104 | } | |
1105 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
1106 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
cb00ea35 | 1107 | if (UDF_SB_LVIDBH(inode->i_sb)) { |
1da177e4 LT |
1108 | struct logicalVolHeaderDesc *lvhd; |
1109 | uint64_t uniqueID; | |
cb00ea35 CG |
1110 | lvhd = |
1111 | (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)-> | |
1112 | logicalVolContentsUse); | |
1da177e4 | 1113 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
cb00ea35 CG |
1114 | *(__le32 *) ((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1115 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1116 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1117 | uniqueID += 16; | |
1118 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1119 | mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb)); | |
1120 | } | |
1121 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
cb00ea35 | 1122 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
1123 | mark_inode_dirty(dir); |
1124 | } | |
1125 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
1126 | brelse(fibh.ebh); |
1127 | brelse(fibh.sbh); | |
d8c76e6f | 1128 | inc_nlink(inode); |
1da177e4 LT |
1129 | inode->i_ctime = current_fs_time(inode->i_sb); |
1130 | mark_inode_dirty(inode); | |
1131 | atomic_inc(&inode->i_count); | |
1132 | d_instantiate(dentry, inode); | |
1133 | unlock_kernel(); | |
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | /* Anybody can rename anything with this: the permission checks are left to the | |
1138 | * higher-level routines. | |
1139 | */ | |
cb00ea35 CG |
1140 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1141 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1142 | { |
cb00ea35 CG |
1143 | struct inode *old_inode = old_dentry->d_inode; |
1144 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1145 | struct udf_fileident_bh ofibh, nfibh; |
cb00ea35 CG |
1146 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = |
1147 | NULL, ocfi, ncfi; | |
1da177e4 LT |
1148 | struct buffer_head *dir_bh = NULL; |
1149 | int retval = -ENOENT; | |
1150 | kernel_lb_addr tloc; | |
1151 | ||
1152 | lock_kernel(); | |
cb00ea35 | 1153 | if ((ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi))) { |
1da177e4 | 1154 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1155 | brelse(ofibh.ebh); |
1156 | brelse(ofibh.sbh); | |
1da177e4 LT |
1157 | } |
1158 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1159 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1160 | != old_inode->i_ino) |
1da177e4 LT |
1161 | goto end_rename; |
1162 | ||
1163 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1164 | if (nfi) { |
1165 | if (!new_inode) { | |
1da177e4 | 1166 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1167 | brelse(nfibh.ebh); |
1168 | brelse(nfibh.sbh); | |
1da177e4 LT |
1169 | nfi = NULL; |
1170 | } | |
1171 | } | |
cb00ea35 | 1172 | if (S_ISDIR(old_inode->i_mode)) { |
1da177e4 LT |
1173 | uint32_t offset = udf_ext0_offset(old_inode); |
1174 | ||
cb00ea35 | 1175 | if (new_inode) { |
1da177e4 LT |
1176 | retval = -ENOTEMPTY; |
1177 | if (!empty_dir(new_inode)) | |
1178 | goto end_rename; | |
1179 | } | |
1180 | retval = -EIO; | |
cb00ea35 | 1181 | if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 1182 | dir_fi = udf_get_fileident(UDF_I_DATA(old_inode) - |
cb00ea35 CG |
1183 | (UDF_I_EFE(old_inode) ? |
1184 | sizeof(struct | |
1185 | extendedFileEntry) : | |
1186 | sizeof(struct fileEntry)), | |
1187 | old_inode->i_sb->s_blocksize, | |
1188 | &offset); | |
1189 | } else { | |
1da177e4 LT |
1190 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1191 | if (!dir_bh) | |
1192 | goto end_rename; | |
cb00ea35 CG |
1193 | dir_fi = |
1194 | udf_get_fileident(dir_bh->b_data, | |
1195 | old_inode->i_sb->s_blocksize, | |
1196 | &offset); | |
1da177e4 LT |
1197 | } |
1198 | if (!dir_fi) | |
1199 | goto end_rename; | |
1200 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
1201 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) | |
cb00ea35 | 1202 | != old_dir->i_ino) |
1da177e4 LT |
1203 | goto end_rename; |
1204 | ||
1205 | retval = -EMLINK; | |
cb00ea35 CG |
1206 | if (!new_inode |
1207 | && new_dir->i_nlink >= | |
1208 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1209 | goto end_rename; |
1210 | } | |
cb00ea35 CG |
1211 | if (!nfi) { |
1212 | nfi = | |
1213 | udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, &retval); | |
1da177e4 LT |
1214 | if (!nfi) |
1215 | goto end_rename; | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * Like most other Unix systems, set the ctime for inodes on a | |
1220 | * rename. | |
1221 | */ | |
1222 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1223 | mark_inode_dirty(old_inode); | |
1224 | ||
1225 | /* | |
1226 | * ok, that's it | |
1227 | */ | |
1228 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1229 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1230 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1231 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1232 | ||
1233 | /* The old fid may have moved - find it again */ | |
1234 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1235 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1236 | ||
cb00ea35 | 1237 | if (new_inode) { |
1da177e4 | 1238 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1239 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1240 | } |
1241 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1242 | mark_inode_dirty(old_dir); | |
1243 | ||
cb00ea35 | 1244 | if (dir_fi) { |
1da177e4 LT |
1245 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir)); |
1246 | udf_update_tag((char *)dir_fi, (sizeof(struct fileIdentDesc) + | |
cb00ea35 CG |
1247 | le16_to_cpu(dir_fi-> |
1248 | lengthOfImpUse) + | |
1249 | 3) & ~3); | |
1250 | if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) { | |
1da177e4 | 1251 | mark_inode_dirty(old_inode); |
cb00ea35 | 1252 | } else |
1da177e4 | 1253 | mark_buffer_dirty_inode(dir_bh, old_inode); |
9a53c3a7 | 1254 | inode_dec_link_count(old_dir); |
cb00ea35 | 1255 | if (new_inode) { |
9a53c3a7 | 1256 | inode_dec_link_count(new_inode); |
cb00ea35 | 1257 | } else { |
d8c76e6f | 1258 | inc_nlink(new_dir); |
1da177e4 LT |
1259 | mark_inode_dirty(new_dir); |
1260 | } | |
1261 | } | |
1262 | ||
cb00ea35 | 1263 | if (ofi) { |
1da177e4 | 1264 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1265 | brelse(ofibh.ebh); |
1266 | brelse(ofibh.sbh); | |
1da177e4 LT |
1267 | } |
1268 | ||
1269 | retval = 0; | |
1270 | ||
cb00ea35 | 1271 | end_rename: |
3bf25cb4 | 1272 | brelse(dir_bh); |
cb00ea35 | 1273 | if (nfi) { |
1da177e4 | 1274 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1275 | brelse(nfibh.ebh); |
1276 | brelse(nfibh.sbh); | |
1da177e4 LT |
1277 | } |
1278 | unlock_kernel(); | |
1279 | return retval; | |
1280 | } | |
1281 | ||
c5ef1c42 | 1282 | const struct inode_operations udf_dir_inode_operations = { |
cb00ea35 CG |
1283 | .lookup = udf_lookup, |
1284 | .create = udf_create, | |
1285 | .link = udf_link, | |
1286 | .unlink = udf_unlink, | |
1287 | .symlink = udf_symlink, | |
1288 | .mkdir = udf_mkdir, | |
1289 | .rmdir = udf_rmdir, | |
1290 | .mknod = udf_mknod, | |
1291 | .rename = udf_rename, | |
1da177e4 | 1292 | }; |