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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * namei.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998-2004 Ben Fennema | |
14 | * (C) 1999-2000 Stelias Computing Inc | |
15 | * | |
16 | * HISTORY | |
17 | * | |
18 | * 12/12/98 blf Created. Split out the lookup code from dir.c | |
19 | * 04/19/99 blf link, mknod, symlink support | |
20 | */ | |
21 | ||
22 | #include "udfdecl.h" | |
23 | ||
24 | #include "udf_i.h" | |
25 | #include "udf_sb.h" | |
26 | #include <linux/string.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/quotaops.h> | |
31 | #include <linux/smp_lock.h> | |
32 | #include <linux/buffer_head.h> | |
e8edc6e0 | 33 | #include <linux/sched.h> |
1da177e4 | 34 | |
cb00ea35 CG |
35 | static inline int udf_match(int len1, const char *name1, int len2, |
36 | const char *name2) | |
1da177e4 LT |
37 | { |
38 | if (len1 != len2) | |
39 | return 0; | |
28de7948 | 40 | |
1da177e4 LT |
41 | return !memcmp(name1, name2, len1); |
42 | } | |
43 | ||
44 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 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 LT |
327 | { |
328 | struct super_block *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 LT |
344 | |
345 | sb = dir->i_sb; | |
346 | ||
cb00ea35 CG |
347 | if (dentry) { |
348 | if (!dentry->d_name.len) { | |
1da177e4 LT |
349 | *err = -EINVAL; |
350 | return NULL; | |
351 | } | |
28de7948 CG |
352 | if (!(namelen = udf_put_filename(sb, dentry->d_name.name, name, |
353 | dentry->d_name.len))) { | |
1da177e4 LT |
354 | *err = -ENAMETOOLONG; |
355 | return NULL; | |
356 | } | |
28de7948 | 357 | } else { |
1da177e4 | 358 | namelen = 0; |
28de7948 | 359 | } |
1da177e4 LT |
360 | |
361 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
362 | ||
363 | f_pos = (udf_ext0_offset(dir) >> 2); | |
364 | ||
28de7948 CG |
365 | fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; |
366 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { | |
1da177e4 | 367 | fibh->sbh = fibh->ebh = NULL; |
28de7948 CG |
368 | } else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
369 | &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 370 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 371 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 372 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 373 | epos.offset -= sizeof(short_ad); |
1da177e4 | 374 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 375 | epos.offset -= sizeof(long_ad); |
28de7948 | 376 | } else { |
1da177e4 | 377 | offset = 0; |
28de7948 | 378 | } |
1da177e4 | 379 | |
cb00ea35 | 380 | if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block))) { |
3bf25cb4 | 381 | brelse(epos.bh); |
1da177e4 LT |
382 | *err = -EIO; |
383 | return NULL; | |
384 | } | |
385 | ||
386 | block = UDF_I_LOCATION(dir).logicalBlockNum; | |
387 | ||
cb00ea35 | 388 | } else { |
1da177e4 LT |
389 | block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0); |
390 | fibh->sbh = fibh->ebh = NULL; | |
391 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
392 | goto add; | |
393 | } | |
394 | ||
cb00ea35 CG |
395 | while ((f_pos < size)) { |
396 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, | |
397 | &elen, &offset); | |
1da177e4 | 398 | |
cb00ea35 | 399 | if (!fi) { |
1da177e4 | 400 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
401 | brelse(fibh->ebh); |
402 | brelse(fibh->sbh); | |
403 | brelse(epos.bh); | |
1da177e4 LT |
404 | *err = -EIO; |
405 | return NULL; | |
406 | } | |
407 | ||
408 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
409 | lfi = cfi->lengthFileIdent; | |
410 | ||
28de7948 | 411 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 412 | nameptr = fi->fileIdent + liu; |
28de7948 | 413 | } else { |
1da177e4 LT |
414 | int poffset; /* Unpaded ending offset */ |
415 | ||
28de7948 | 416 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi; |
1da177e4 | 417 | |
28de7948 CG |
418 | if (poffset >= lfi) { |
419 | nameptr = (char *)(fibh->ebh->b_data + poffset - lfi); | |
420 | } else { | |
1da177e4 | 421 | nameptr = fname; |
28de7948 CG |
422 | memcpy(nameptr, fi->fileIdent + liu, lfi - poffset); |
423 | memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset); | |
1da177e4 LT |
424 | } |
425 | } | |
426 | ||
cb00ea35 | 427 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
28de7948 | 428 | if (((sizeof(struct fileIdentDesc) + liu + lfi + 3) & ~3) == nfidlen) { |
3bf25cb4 | 429 | brelse(epos.bh); |
1da177e4 LT |
430 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
431 | cfi->fileVersionNum = cpu_to_le16(1); | |
432 | cfi->fileCharacteristics = 0; | |
433 | cfi->lengthFileIdent = namelen; | |
434 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
28de7948 | 435 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 436 | return fi; |
28de7948 | 437 | } else { |
1da177e4 LT |
438 | *err = -EIO; |
439 | return NULL; | |
440 | } | |
441 | } | |
442 | } | |
443 | ||
444 | if (!lfi || !dentry) | |
445 | continue; | |
446 | ||
447 | if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)) && | |
28de7948 | 448 | udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name)) { |
1da177e4 | 449 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
450 | brelse(fibh->ebh); |
451 | brelse(fibh->sbh); | |
452 | brelse(epos.bh); | |
1da177e4 LT |
453 | *err = -EEXIST; |
454 | return NULL; | |
455 | } | |
456 | } | |
457 | ||
28de7948 | 458 | add: |
1da177e4 LT |
459 | f_pos += nfidlen; |
460 | ||
461 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB && | |
cb00ea35 | 462 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 463 | brelse(epos.bh); |
ff116fc8 | 464 | epos.bh = NULL; |
1da177e4 LT |
465 | fibh->soffset -= udf_ext0_offset(dir); |
466 | fibh->eoffset -= udf_ext0_offset(dir); | |
467 | f_pos -= (udf_ext0_offset(dir) >> 2); | |
468 | if (fibh->sbh != fibh->ebh) | |
3bf25cb4 JK |
469 | brelse(fibh->ebh); |
470 | brelse(fibh->sbh); | |
28de7948 | 471 | if (!(fibh->sbh = fibh->ebh = udf_expand_dir_adinicb(dir, &block, err))) |
1da177e4 | 472 | return NULL; |
ff116fc8 | 473 | epos.block = UDF_I_LOCATION(dir); |
1da177e4 | 474 | eloc.logicalBlockNum = block; |
28de7948 | 475 | eloc.partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum; |
1da177e4 | 476 | elen = dir->i_sb->s_blocksize; |
ff116fc8 | 477 | epos.offset = udf_file_entry_alloc_offset(dir); |
1da177e4 | 478 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 479 | epos.offset += sizeof(short_ad); |
1da177e4 | 480 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 481 | epos.offset += sizeof(long_ad); |
1da177e4 LT |
482 | } |
483 | ||
cb00ea35 | 484 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
485 | fibh->soffset = fibh->eoffset; |
486 | fibh->eoffset += nfidlen; | |
cb00ea35 | 487 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 488 | brelse(fibh->sbh); |
1da177e4 LT |
489 | fibh->sbh = fibh->ebh; |
490 | } | |
491 | ||
cb00ea35 | 492 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 493 | block = UDF_I_LOCATION(dir).logicalBlockNum; |
28de7948 | 494 | fi = (struct fileIdentDesc *)(UDF_I_DATA(dir) + fibh->soffset - |
cb00ea35 CG |
495 | udf_ext0_offset(dir) + |
496 | UDF_I_LENEATTR(dir)); | |
497 | } else { | |
1da177e4 | 498 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 CG |
499 | dir->i_sb->s_blocksize_bits); |
500 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 501 | } |
cb00ea35 | 502 | } else { |
1da177e4 LT |
503 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
504 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 505 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 506 | brelse(fibh->sbh); |
1da177e4 LT |
507 | fibh->sbh = fibh->ebh; |
508 | } | |
509 | ||
510 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 511 | dir->i_sb->s_blocksize_bits); |
28de7948 CG |
512 | fibh->ebh = udf_bread(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 1, err); |
513 | if (!fibh->ebh) { | |
3bf25cb4 JK |
514 | brelse(epos.bh); |
515 | brelse(fibh->sbh); | |
1da177e4 LT |
516 | return NULL; |
517 | } | |
518 | ||
28de7948 | 519 | if (!fibh->soffset) { |
ff116fc8 | 520 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 521 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 522 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 CG |
523 | dir->i_sb->s_blocksize_bits); |
524 | } else { | |
cb00ea35 | 525 | block++; |
28de7948 | 526 | } |
1da177e4 | 527 | |
3bf25cb4 | 528 | brelse(fibh->sbh); |
1da177e4 LT |
529 | fibh->sbh = fibh->ebh; |
530 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 531 | } else { |
1da177e4 | 532 | fi = (struct fileIdentDesc *) |
28de7948 | 533 | (fibh->sbh->b_data + sb->s_blocksize + fibh->soffset); |
1da177e4 LT |
534 | } |
535 | } | |
536 | ||
537 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
538 | if (UDF_SB_UDFREV(sb) >= 0x0200) | |
28de7948 | 539 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, sizeof(tag)); |
1da177e4 | 540 | else |
28de7948 | 541 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, sizeof(tag)); |
1da177e4 LT |
542 | cfi->fileVersionNum = cpu_to_le16(1); |
543 | cfi->lengthFileIdent = namelen; | |
544 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 545 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
3bf25cb4 | 546 | brelse(epos.bh); |
1da177e4 LT |
547 | dir->i_size += nfidlen; |
548 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) | |
549 | UDF_I_LENALLOC(dir) += nfidlen; | |
550 | mark_inode_dirty(dir); | |
551 | return fi; | |
cb00ea35 | 552 | } else { |
3bf25cb4 | 553 | brelse(epos.bh); |
1da177e4 | 554 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
555 | brelse(fibh->ebh); |
556 | brelse(fibh->sbh); | |
1da177e4 LT |
557 | *err = -EIO; |
558 | return NULL; | |
559 | } | |
560 | } | |
561 | ||
562 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
563 | struct udf_fileident_bh *fibh, |
564 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
565 | { |
566 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 567 | |
1da177e4 LT |
568 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
569 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 570 | |
1da177e4 LT |
571 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
572 | } | |
573 | ||
cb00ea35 CG |
574 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
575 | struct nameidata *nd) | |
1da177e4 LT |
576 | { |
577 | struct udf_fileident_bh fibh; | |
578 | struct inode *inode; | |
579 | struct fileIdentDesc cfi, *fi; | |
580 | int err; | |
581 | ||
582 | lock_kernel(); | |
583 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 584 | if (!inode) { |
1da177e4 LT |
585 | unlock_kernel(); |
586 | return err; | |
587 | } | |
588 | ||
589 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
590 | inode->i_data.a_ops = &udf_adinicb_aops; | |
591 | else | |
592 | inode->i_data.a_ops = &udf_aops; | |
593 | inode->i_op = &udf_file_inode_operations; | |
594 | inode->i_fop = &udf_file_operations; | |
595 | inode->i_mode = mode; | |
596 | mark_inode_dirty(inode); | |
597 | ||
cb00ea35 CG |
598 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
599 | inode->i_nlink--; | |
1da177e4 LT |
600 | mark_inode_dirty(inode); |
601 | iput(inode); | |
602 | unlock_kernel(); | |
603 | return err; | |
604 | } | |
605 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
606 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
28de7948 CG |
607 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
608 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 | 609 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
cb00ea35 | 610 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
611 | mark_inode_dirty(dir); |
612 | } | |
613 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
614 | brelse(fibh.ebh); |
615 | brelse(fibh.sbh); | |
1da177e4 LT |
616 | unlock_kernel(); |
617 | d_instantiate(dentry, inode); | |
28de7948 | 618 | |
1da177e4 LT |
619 | return 0; |
620 | } | |
621 | ||
cb00ea35 CG |
622 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
623 | dev_t rdev) | |
1da177e4 | 624 | { |
cb00ea35 | 625 | struct inode *inode; |
1da177e4 LT |
626 | struct udf_fileident_bh fibh; |
627 | struct fileIdentDesc cfi, *fi; | |
628 | int err; | |
629 | ||
630 | if (!old_valid_dev(rdev)) | |
631 | return -EINVAL; | |
632 | ||
633 | lock_kernel(); | |
634 | err = -EIO; | |
635 | inode = udf_new_inode(dir, mode, &err); | |
636 | if (!inode) | |
637 | goto out; | |
638 | ||
639 | inode->i_uid = current->fsuid; | |
640 | init_special_inode(inode, mode, rdev); | |
cb00ea35 CG |
641 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
642 | inode->i_nlink--; | |
1da177e4 LT |
643 | mark_inode_dirty(inode); |
644 | iput(inode); | |
645 | unlock_kernel(); | |
646 | return err; | |
647 | } | |
648 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
649 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
28de7948 CG |
650 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
651 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 | 652 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
cb00ea35 | 653 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
654 | mark_inode_dirty(dir); |
655 | } | |
656 | mark_inode_dirty(inode); | |
657 | ||
658 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
659 | brelse(fibh.ebh); |
660 | brelse(fibh.sbh); | |
1da177e4 LT |
661 | d_instantiate(dentry, inode); |
662 | err = 0; | |
28de7948 CG |
663 | |
664 | out: | |
1da177e4 LT |
665 | unlock_kernel(); |
666 | return err; | |
667 | } | |
668 | ||
cb00ea35 | 669 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 670 | { |
cb00ea35 | 671 | struct inode *inode; |
1da177e4 LT |
672 | struct udf_fileident_bh fibh; |
673 | struct fileIdentDesc cfi, *fi; | |
674 | int err; | |
675 | ||
676 | lock_kernel(); | |
677 | err = -EMLINK; | |
cb00ea35 | 678 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
679 | goto out; |
680 | ||
681 | err = -EIO; | |
682 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
683 | if (!inode) | |
684 | goto out; | |
685 | ||
686 | inode->i_op = &udf_dir_inode_operations; | |
687 | inode->i_fop = &udf_dir_operations; | |
cb00ea35 | 688 | if (!(fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err))) { |
1da177e4 LT |
689 | inode->i_nlink--; |
690 | mark_inode_dirty(inode); | |
691 | iput(inode); | |
692 | goto out; | |
693 | } | |
694 | inode->i_nlink = 2; | |
695 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
696 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir)); | |
28de7948 CG |
697 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
698 | cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL); | |
699 | cfi.fileCharacteristics = FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 700 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 701 | brelse(fibh.sbh); |
1da177e4 LT |
702 | inode->i_mode = S_IFDIR | mode; |
703 | if (dir->i_mode & S_ISGID) | |
704 | inode->i_mode |= S_ISGID; | |
705 | mark_inode_dirty(inode); | |
706 | ||
cb00ea35 | 707 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
1da177e4 LT |
708 | inode->i_nlink = 0; |
709 | mark_inode_dirty(inode); | |
710 | iput(inode); | |
711 | goto out; | |
712 | } | |
713 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
714 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
28de7948 CG |
715 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
716 | cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
717 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
718 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 719 | inc_nlink(dir); |
1da177e4 LT |
720 | mark_inode_dirty(dir); |
721 | d_instantiate(dentry, inode); | |
722 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
723 | brelse(fibh.ebh); |
724 | brelse(fibh.sbh); | |
1da177e4 | 725 | err = 0; |
28de7948 CG |
726 | |
727 | out: | |
1da177e4 LT |
728 | unlock_kernel(); |
729 | return err; | |
730 | } | |
731 | ||
732 | static int empty_dir(struct inode *dir) | |
733 | { | |
734 | struct fileIdentDesc *fi, cfi; | |
735 | struct udf_fileident_bh fibh; | |
736 | loff_t f_pos; | |
737 | loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; | |
738 | int block; | |
ff116fc8 JK |
739 | kernel_lb_addr eloc; |
740 | uint32_t elen; | |
60448b1d | 741 | sector_t offset; |
28de7948 | 742 | struct extent_position epos = {}; |
1da177e4 LT |
743 | |
744 | f_pos = (udf_ext0_offset(dir) >> 2); | |
745 | ||
28de7948 | 746 | fibh.soffset = fibh.eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; |
1da177e4 | 747 | |
28de7948 | 748 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 749 | fibh.sbh = fibh.ebh = NULL; |
28de7948 CG |
750 | } else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), |
751 | &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 752 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 753 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
1da177e4 | 754 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 755 | epos.offset -= sizeof(short_ad); |
1da177e4 | 756 | else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 757 | epos.offset -= sizeof(long_ad); |
28de7948 | 758 | } else { |
1da177e4 | 759 | offset = 0; |
28de7948 | 760 | } |
1da177e4 | 761 | |
cb00ea35 | 762 | if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block))) { |
3bf25cb4 | 763 | brelse(epos.bh); |
1da177e4 LT |
764 | return 0; |
765 | } | |
cb00ea35 | 766 | } else { |
3bf25cb4 | 767 | brelse(epos.bh); |
1da177e4 LT |
768 | return 0; |
769 | } | |
770 | ||
cb00ea35 CG |
771 | while ((f_pos < size)) { |
772 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, | |
773 | &elen, &offset); | |
cb00ea35 | 774 | if (!fi) { |
1da177e4 | 775 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
776 | brelse(fibh.ebh); |
777 | brelse(fibh.sbh); | |
778 | brelse(epos.bh); | |
1da177e4 LT |
779 | return 0; |
780 | } | |
781 | ||
28de7948 CG |
782 | if (cfi.lengthFileIdent && |
783 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 784 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
785 | brelse(fibh.ebh); |
786 | brelse(fibh.sbh); | |
787 | brelse(epos.bh); | |
1da177e4 LT |
788 | return 0; |
789 | } | |
790 | } | |
28de7948 | 791 | |
1da177e4 | 792 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
793 | brelse(fibh.ebh); |
794 | brelse(fibh.sbh); | |
795 | brelse(epos.bh); | |
28de7948 | 796 | |
1da177e4 LT |
797 | return 1; |
798 | } | |
799 | ||
cb00ea35 | 800 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
801 | { |
802 | int retval; | |
cb00ea35 | 803 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
804 | struct udf_fileident_bh fibh; |
805 | struct fileIdentDesc *fi, cfi; | |
806 | kernel_lb_addr tloc; | |
807 | ||
808 | retval = -ENOENT; | |
809 | lock_kernel(); | |
810 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
811 | if (!fi) | |
812 | goto out; | |
813 | ||
814 | retval = -EIO; | |
815 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
816 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
817 | goto end_rmdir; | |
818 | retval = -ENOTEMPTY; | |
819 | if (!empty_dir(inode)) | |
820 | goto end_rmdir; | |
821 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
822 | if (retval) | |
823 | goto end_rmdir; | |
824 | if (inode->i_nlink != 2) | |
825 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
826 | "empty directory has nlink != 2 (%d)", |
827 | inode->i_nlink); | |
ce71ec36 | 828 | clear_nlink(inode); |
1da177e4 | 829 | inode->i_size = 0; |
c007c06e | 830 | inode_dec_link_count(dir); |
28de7948 | 831 | inode->i_ctime = dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); |
1da177e4 LT |
832 | mark_inode_dirty(dir); |
833 | ||
28de7948 | 834 | end_rmdir: |
1da177e4 | 835 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
836 | brelse(fibh.ebh); |
837 | brelse(fibh.sbh); | |
28de7948 CG |
838 | |
839 | out: | |
1da177e4 LT |
840 | unlock_kernel(); |
841 | return retval; | |
842 | } | |
843 | ||
cb00ea35 | 844 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
845 | { |
846 | int retval; | |
cb00ea35 | 847 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
848 | struct udf_fileident_bh fibh; |
849 | struct fileIdentDesc *fi; | |
850 | struct fileIdentDesc cfi; | |
851 | kernel_lb_addr tloc; | |
852 | ||
853 | retval = -ENOENT; | |
854 | lock_kernel(); | |
855 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
856 | if (!fi) | |
857 | goto out; | |
858 | ||
859 | retval = -EIO; | |
860 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
861 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
862 | goto end_unlink; | |
863 | ||
cb00ea35 | 864 | if (!inode->i_nlink) { |
1da177e4 | 865 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 866 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
867 | inode->i_nlink = 1; |
868 | } | |
869 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
870 | if (retval) | |
871 | goto end_unlink; | |
872 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
873 | mark_inode_dirty(dir); | |
9a53c3a7 | 874 | inode_dec_link_count(inode); |
1da177e4 LT |
875 | inode->i_ctime = dir->i_ctime; |
876 | retval = 0; | |
877 | ||
28de7948 | 878 | end_unlink: |
1da177e4 | 879 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
880 | brelse(fibh.ebh); |
881 | brelse(fibh.sbh); | |
28de7948 CG |
882 | |
883 | out: | |
1da177e4 LT |
884 | unlock_kernel(); |
885 | return retval; | |
886 | } | |
887 | ||
cb00ea35 CG |
888 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
889 | const char *symname) | |
1da177e4 | 890 | { |
cb00ea35 | 891 | struct inode *inode; |
1da177e4 LT |
892 | struct pathComponent *pc; |
893 | char *compstart; | |
894 | struct udf_fileident_bh fibh; | |
28de7948 | 895 | struct extent_position epos = {}; |
1da177e4 LT |
896 | int eoffset, elen = 0; |
897 | struct fileIdentDesc *fi; | |
898 | struct fileIdentDesc cfi; | |
899 | char *ea; | |
900 | int err; | |
901 | int block; | |
902 | char name[UDF_NAME_LEN]; | |
903 | int namelen; | |
904 | ||
905 | lock_kernel(); | |
906 | if (!(inode = udf_new_inode(dir, S_IFLNK, &err))) | |
907 | goto out; | |
908 | ||
909 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
910 | inode->i_data.a_ops = &udf_symlink_aops; | |
911 | inode->i_op = &page_symlink_inode_operations; | |
912 | ||
cb00ea35 | 913 | if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 JK |
914 | kernel_lb_addr eloc; |
915 | uint32_t elen; | |
1da177e4 LT |
916 | |
917 | block = udf_new_block(inode->i_sb, inode, | |
28de7948 CG |
918 | UDF_I_LOCATION(inode).partitionReferenceNum, |
919 | UDF_I_LOCATION(inode).logicalBlockNum, &err); | |
1da177e4 LT |
920 | if (!block) |
921 | goto out_no_entry; | |
ff116fc8 JK |
922 | epos.block = UDF_I_LOCATION(inode); |
923 | epos.offset = udf_file_entry_alloc_offset(inode); | |
924 | epos.bh = NULL; | |
1da177e4 | 925 | eloc.logicalBlockNum = block; |
28de7948 | 926 | eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; |
1da177e4 LT |
927 | elen = inode->i_sb->s_blocksize; |
928 | UDF_I_LENEXTENTS(inode) = elen; | |
ff116fc8 | 929 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 930 | brelse(epos.bh); |
1da177e4 LT |
931 | |
932 | block = udf_get_pblock(inode->i_sb, block, | |
28de7948 | 933 | UDF_I_LOCATION(inode).partitionReferenceNum, 0); |
ff116fc8 JK |
934 | epos.bh = udf_tread(inode->i_sb, block); |
935 | lock_buffer(epos.bh); | |
936 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
937 | set_buffer_uptodate(epos.bh); | |
938 | unlock_buffer(epos.bh); | |
939 | mark_buffer_dirty_inode(epos.bh, inode); | |
940 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
28de7948 | 941 | } else { |
1da177e4 | 942 | ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode); |
28de7948 | 943 | } |
1da177e4 LT |
944 | |
945 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
946 | pc = (struct pathComponent *)ea; | |
947 | ||
cb00ea35 CG |
948 | if (*symname == '/') { |
949 | do { | |
1da177e4 LT |
950 | symname++; |
951 | } while (*symname == '/'); | |
952 | ||
953 | pc->componentType = 1; | |
954 | pc->lengthComponentIdent = 0; | |
955 | pc->componentFileVersionNum = 0; | |
956 | pc += sizeof(struct pathComponent); | |
957 | elen += sizeof(struct pathComponent); | |
958 | } | |
959 | ||
960 | err = -ENAMETOOLONG; | |
961 | ||
cb00ea35 | 962 | while (*symname) { |
1da177e4 LT |
963 | if (elen + sizeof(struct pathComponent) > eoffset) |
964 | goto out_no_entry; | |
965 | ||
966 | pc = (struct pathComponent *)(ea + elen); | |
967 | ||
968 | compstart = (char *)symname; | |
969 | ||
cb00ea35 | 970 | do { |
1da177e4 LT |
971 | symname++; |
972 | } while (*symname && *symname != '/'); | |
973 | ||
974 | pc->componentType = 5; | |
975 | pc->lengthComponentIdent = 0; | |
976 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
977 | if (compstart[0] == '.') { |
978 | if ((symname - compstart) == 1) | |
1da177e4 | 979 | pc->componentType = 4; |
28de7948 | 980 | else if ((symname - compstart) == 2 && compstart[1] == '.') |
1da177e4 LT |
981 | pc->componentType = 3; |
982 | } | |
983 | ||
cb00ea35 | 984 | if (pc->componentType == 5) { |
28de7948 CG |
985 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
986 | symname - compstart); | |
987 | if (!namelen) | |
1da177e4 LT |
988 | goto out_no_entry; |
989 | ||
28de7948 | 990 | if (elen + sizeof(struct pathComponent) + namelen > eoffset) |
1da177e4 LT |
991 | goto out_no_entry; |
992 | else | |
993 | pc->lengthComponentIdent = namelen; | |
994 | ||
995 | memcpy(pc->componentIdent, name, namelen); | |
996 | } | |
997 | ||
998 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
999 | ||
cb00ea35 CG |
1000 | if (*symname) { |
1001 | do { | |
1da177e4 LT |
1002 | symname++; |
1003 | } while (*symname == '/'); | |
1004 | } | |
1005 | } | |
1006 | ||
3bf25cb4 | 1007 | brelse(epos.bh); |
1da177e4 LT |
1008 | inode->i_size = elen; |
1009 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
1010 | UDF_I_LENALLOC(inode) = inode->i_size; | |
1011 | mark_inode_dirty(inode); | |
1012 | ||
1013 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) | |
1014 | goto out_no_entry; | |
1015 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
1016 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
cb00ea35 | 1017 | if (UDF_SB_LVIDBH(inode->i_sb)) { |
1da177e4 LT |
1018 | struct logicalVolHeaderDesc *lvhd; |
1019 | uint64_t uniqueID; | |
28de7948 | 1020 | lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse); |
1da177e4 | 1021 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1022 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1023 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1024 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1025 | uniqueID += 16; | |
1026 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1027 | mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb)); | |
1028 | } | |
1029 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
cb00ea35 | 1030 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
1031 | mark_inode_dirty(dir); |
1032 | } | |
1033 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
1034 | brelse(fibh.ebh); |
1035 | brelse(fibh.sbh); | |
1da177e4 LT |
1036 | d_instantiate(dentry, inode); |
1037 | err = 0; | |
1038 | ||
28de7948 | 1039 | out: |
1da177e4 LT |
1040 | unlock_kernel(); |
1041 | return err; | |
1042 | ||
28de7948 | 1043 | out_no_entry: |
9a53c3a7 | 1044 | inode_dec_link_count(inode); |
1da177e4 LT |
1045 | iput(inode); |
1046 | goto out; | |
1047 | } | |
1048 | ||
cb00ea35 CG |
1049 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1050 | struct dentry *dentry) | |
1da177e4 LT |
1051 | { |
1052 | struct inode *inode = old_dentry->d_inode; | |
1053 | struct udf_fileident_bh fibh; | |
1054 | struct fileIdentDesc cfi, *fi; | |
1055 | int err; | |
1056 | ||
1057 | lock_kernel(); | |
cb00ea35 | 1058 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1059 | unlock_kernel(); |
1060 | return -EMLINK; | |
1061 | } | |
1062 | ||
cb00ea35 | 1063 | if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) { |
1da177e4 LT |
1064 | unlock_kernel(); |
1065 | return err; | |
1066 | } | |
1067 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
1068 | cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); | |
cb00ea35 | 1069 | if (UDF_SB_LVIDBH(inode->i_sb)) { |
1da177e4 LT |
1070 | struct logicalVolHeaderDesc *lvhd; |
1071 | uint64_t uniqueID; | |
28de7948 | 1072 | lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse); |
1da177e4 | 1073 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1074 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1075 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1076 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1077 | uniqueID += 16; | |
1078 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1079 | mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb)); | |
1080 | } | |
1081 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
cb00ea35 | 1082 | if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
1083 | mark_inode_dirty(dir); |
1084 | } | |
28de7948 | 1085 | |
1da177e4 | 1086 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1087 | brelse(fibh.ebh); |
1088 | brelse(fibh.sbh); | |
d8c76e6f | 1089 | inc_nlink(inode); |
1da177e4 LT |
1090 | inode->i_ctime = current_fs_time(inode->i_sb); |
1091 | mark_inode_dirty(inode); | |
1092 | atomic_inc(&inode->i_count); | |
1093 | d_instantiate(dentry, inode); | |
1094 | unlock_kernel(); | |
28de7948 | 1095 | |
1da177e4 LT |
1096 | return 0; |
1097 | } | |
1098 | ||
1099 | /* Anybody can rename anything with this: the permission checks are left to the | |
1100 | * higher-level routines. | |
1101 | */ | |
cb00ea35 CG |
1102 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1103 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1104 | { |
cb00ea35 CG |
1105 | struct inode *old_inode = old_dentry->d_inode; |
1106 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1107 | struct udf_fileident_bh ofibh, nfibh; |
28de7948 | 1108 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL, ocfi, ncfi; |
1da177e4 LT |
1109 | struct buffer_head *dir_bh = NULL; |
1110 | int retval = -ENOENT; | |
1111 | kernel_lb_addr tloc; | |
1112 | ||
1113 | lock_kernel(); | |
cb00ea35 | 1114 | if ((ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi))) { |
1da177e4 | 1115 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1116 | brelse(ofibh.ebh); |
1117 | brelse(ofibh.sbh); | |
1da177e4 LT |
1118 | } |
1119 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1120 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1121 | != old_inode->i_ino) |
1da177e4 LT |
1122 | goto end_rename; |
1123 | ||
1124 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1125 | if (nfi) { |
1126 | if (!new_inode) { | |
1da177e4 | 1127 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1128 | brelse(nfibh.ebh); |
1129 | brelse(nfibh.sbh); | |
1da177e4 LT |
1130 | nfi = NULL; |
1131 | } | |
1132 | } | |
cb00ea35 | 1133 | if (S_ISDIR(old_inode->i_mode)) { |
1da177e4 LT |
1134 | uint32_t offset = udf_ext0_offset(old_inode); |
1135 | ||
cb00ea35 | 1136 | if (new_inode) { |
1da177e4 LT |
1137 | retval = -ENOTEMPTY; |
1138 | if (!empty_dir(new_inode)) | |
1139 | goto end_rename; | |
1140 | } | |
1141 | retval = -EIO; | |
cb00ea35 | 1142 | if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 1143 | dir_fi = udf_get_fileident(UDF_I_DATA(old_inode) - |
cb00ea35 | 1144 | (UDF_I_EFE(old_inode) ? |
28de7948 | 1145 | sizeof(struct extendedFileEntry) : |
cb00ea35 | 1146 | sizeof(struct fileEntry)), |
28de7948 | 1147 | old_inode->i_sb->s_blocksize, &offset); |
cb00ea35 | 1148 | } else { |
1da177e4 LT |
1149 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1150 | if (!dir_bh) | |
1151 | goto end_rename; | |
28de7948 | 1152 | dir_fi = udf_get_fileident(dir_bh->b_data, old_inode->i_sb->s_blocksize, &offset); |
1da177e4 LT |
1153 | } |
1154 | if (!dir_fi) | |
1155 | goto end_rename; | |
1156 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
28de7948 | 1157 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != old_dir->i_ino) |
1da177e4 LT |
1158 | goto end_rename; |
1159 | ||
1160 | retval = -EMLINK; | |
28de7948 | 1161 | if (!new_inode && new_dir->i_nlink >= (256 << sizeof(new_dir->i_nlink)) - 1) |
1da177e4 LT |
1162 | goto end_rename; |
1163 | } | |
cb00ea35 | 1164 | if (!nfi) { |
28de7948 | 1165 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, &retval); |
1da177e4 LT |
1166 | if (!nfi) |
1167 | goto end_rename; | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * Like most other Unix systems, set the ctime for inodes on a | |
1172 | * rename. | |
1173 | */ | |
1174 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1175 | mark_inode_dirty(old_inode); | |
1176 | ||
1177 | /* | |
1178 | * ok, that's it | |
1179 | */ | |
1180 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1181 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1182 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1183 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1184 | ||
1185 | /* The old fid may have moved - find it again */ | |
1186 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1187 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1188 | ||
cb00ea35 | 1189 | if (new_inode) { |
1da177e4 | 1190 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1191 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1192 | } |
1193 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1194 | mark_inode_dirty(old_dir); | |
1195 | ||
cb00ea35 | 1196 | if (dir_fi) { |
1da177e4 LT |
1197 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir)); |
1198 | udf_update_tag((char *)dir_fi, (sizeof(struct fileIdentDesc) + | |
28de7948 | 1199 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); |
cb00ea35 | 1200 | if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 | 1201 | mark_inode_dirty(old_inode); |
28de7948 | 1202 | } else { |
1da177e4 | 1203 | mark_buffer_dirty_inode(dir_bh, old_inode); |
28de7948 | 1204 | } |
9a53c3a7 | 1205 | inode_dec_link_count(old_dir); |
cb00ea35 | 1206 | if (new_inode) { |
9a53c3a7 | 1207 | inode_dec_link_count(new_inode); |
cb00ea35 | 1208 | } else { |
d8c76e6f | 1209 | inc_nlink(new_dir); |
1da177e4 LT |
1210 | mark_inode_dirty(new_dir); |
1211 | } | |
1212 | } | |
1213 | ||
cb00ea35 | 1214 | if (ofi) { |
1da177e4 | 1215 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1216 | brelse(ofibh.ebh); |
1217 | brelse(ofibh.sbh); | |
1da177e4 LT |
1218 | } |
1219 | ||
1220 | retval = 0; | |
1221 | ||
28de7948 | 1222 | end_rename: |
3bf25cb4 | 1223 | brelse(dir_bh); |
cb00ea35 | 1224 | if (nfi) { |
1da177e4 | 1225 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1226 | brelse(nfibh.ebh); |
1227 | brelse(nfibh.sbh); | |
1da177e4 LT |
1228 | } |
1229 | unlock_kernel(); | |
28de7948 | 1230 | |
1da177e4 LT |
1231 | return retval; |
1232 | } | |
1233 | ||
c5ef1c42 | 1234 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1235 | .lookup = udf_lookup, |
1236 | .create = udf_create, | |
1237 | .link = udf_link, | |
1238 | .unlink = udf_unlink, | |
1239 | .symlink = udf_symlink, | |
1240 | .mkdir = udf_mkdir, | |
1241 | .rmdir = udf_rmdir, | |
1242 | .mknod = udf_mknod, | |
1243 | .rename = udf_rename, | |
1da177e4 | 1244 | }; |