Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * namei.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998-2004 Ben Fennema | |
14 | * (C) 1999-2000 Stelias Computing Inc | |
15 | * | |
16 | * HISTORY | |
17 | * | |
18 | * 12/12/98 blf Created. Split out the lookup code from dir.c | |
19 | * 04/19/99 blf link, mknod, symlink support | |
20 | */ | |
21 | ||
22 | #include "udfdecl.h" | |
23 | ||
24 | #include "udf_i.h" | |
25 | #include "udf_sb.h" | |
26 | #include <linux/string.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/quotaops.h> | |
31 | #include <linux/smp_lock.h> | |
32 | #include <linux/buffer_head.h> | |
e8edc6e0 | 33 | #include <linux/sched.h> |
1da177e4 | 34 | |
cb00ea35 CG |
35 | static inline int udf_match(int len1, const char *name1, int len2, |
36 | const char *name2) | |
1da177e4 LT |
37 | { |
38 | if (len1 != len2) | |
39 | return 0; | |
28de7948 | 40 | |
1da177e4 LT |
41 | return !memcmp(name1, name2, len1); |
42 | } | |
43 | ||
44 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 | 45 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
4b11111a | 46 | uint8_t *impuse, uint8_t *fileident) |
1da177e4 LT |
47 | { |
48 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag); | |
49 | uint16_t crc; | |
1da177e4 LT |
50 | int offset; |
51 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
52 | uint8_t lfi = cfi->lengthFileIdent; | |
53 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
28de7948 | 54 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
55 | int adinicb = 0; |
56 | ||
c0b34438 | 57 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 LT |
58 | adinicb = 1; |
59 | ||
60 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
61 | ||
cb00ea35 | 62 | if (impuse) { |
28de7948 CG |
63 | if (adinicb || (offset + liu < 0)) { |
64 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
65 | } else if (offset >= 0) { | |
1da177e4 | 66 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
28de7948 CG |
67 | } else { |
68 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
4b11111a MS |
69 | memcpy(fibh->ebh->b_data, impuse - offset, |
70 | liu + offset); | |
1da177e4 LT |
71 | } |
72 | } | |
73 | ||
74 | offset += liu; | |
75 | ||
cb00ea35 | 76 | if (fileident) { |
28de7948 CG |
77 | if (adinicb || (offset + lfi < 0)) { |
78 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
79 | } else if (offset >= 0) { | |
1da177e4 | 80 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 81 | } else { |
4b11111a MS |
82 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
83 | -offset); | |
84 | memcpy(fibh->ebh->b_data, fileident - offset, | |
85 | lfi + offset); | |
1da177e4 LT |
86 | } |
87 | } | |
88 | ||
89 | offset += lfi; | |
90 | ||
28de7948 CG |
91 | if (adinicb || (offset + padlen < 0)) { |
92 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
93 | } else if (offset >= 0) { | |
1da177e4 | 94 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
95 | } else { |
96 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
97 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
98 | } | |
99 | ||
28de7948 CG |
100 | crc = udf_crc((uint8_t *)cfi + sizeof(tag), |
101 | sizeof(struct fileIdentDesc) - sizeof(tag), 0); | |
102 | ||
103 | if (fibh->sbh == fibh->ebh) { | |
104 | crc = udf_crc((uint8_t *)sfi->impUse, | |
4b11111a MS |
105 | crclen + sizeof(tag) - |
106 | sizeof(struct fileIdentDesc), crc); | |
28de7948 | 107 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
4b11111a MS |
108 | crc = udf_crc(fibh->ebh->b_data + |
109 | sizeof(struct fileIdentDesc) + | |
110 | fibh->soffset, | |
111 | crclen + sizeof(tag) - | |
112 | sizeof(struct fileIdentDesc), | |
113 | crc); | |
28de7948 CG |
114 | } else { |
115 | crc = udf_crc((uint8_t *)sfi->impUse, | |
4b11111a MS |
116 | -fibh->soffset - sizeof(struct fileIdentDesc), |
117 | crc); | |
1da177e4 LT |
118 | crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc); |
119 | } | |
120 | ||
121 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
122 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
3f2587bb | 123 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
1da177e4 | 124 | |
28de7948 | 125 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
4b11111a MS |
126 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
127 | sizeof(struct fileIdentDesc)); | |
28de7948 CG |
128 | } else { |
129 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
130 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 131 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
132 | } |
133 | ||
28de7948 | 134 | if (adinicb) { |
1da177e4 | 135 | mark_inode_dirty(inode); |
28de7948 | 136 | } else { |
1da177e4 LT |
137 | if (fibh->sbh != fibh->ebh) |
138 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
139 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
140 | } | |
141 | return 0; | |
142 | } | |
143 | ||
cb00ea35 CG |
144 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
145 | struct dentry *dentry, | |
146 | struct udf_fileident_bh *fibh, | |
147 | struct fileIdentDesc *cfi) | |
1da177e4 | 148 | { |
cb00ea35 | 149 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
150 | loff_t f_pos; |
151 | int block, flen; | |
152 | char fname[UDF_NAME_LEN]; | |
153 | char *nameptr; | |
154 | uint8_t lfi; | |
155 | uint16_t liu; | |
ec471dc4 | 156 | loff_t size; |
ff116fc8 JK |
157 | kernel_lb_addr eloc; |
158 | uint32_t elen; | |
60448b1d | 159 | sector_t offset; |
28de7948 | 160 | struct extent_position epos = {}; |
48d6d8ff | 161 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 162 | |
af793295 JK |
163 | size = udf_ext0_offset(dir) + dir->i_size; |
164 | f_pos = udf_ext0_offset(dir); | |
1da177e4 | 165 | |
af793295 | 166 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 167 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 168 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 169 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
170 | &epos, &eloc, &elen, &offset) == |
171 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 172 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 173 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 174 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 175 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 176 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 177 | epos.offset -= sizeof(long_ad); |
4b11111a | 178 | } else |
1da177e4 LT |
179 | offset = 0; |
180 | ||
4b11111a MS |
181 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
182 | if (!fibh->sbh) { | |
3bf25cb4 | 183 | brelse(epos.bh); |
1da177e4 LT |
184 | return NULL; |
185 | } | |
cb00ea35 | 186 | } else { |
3bf25cb4 | 187 | brelse(epos.bh); |
1da177e4 LT |
188 | return NULL; |
189 | } | |
190 | ||
af793295 | 191 | while (f_pos < size) { |
cb00ea35 CG |
192 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
193 | &elen, &offset); | |
cb00ea35 | 194 | if (!fi) { |
1da177e4 | 195 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
196 | brelse(fibh->ebh); |
197 | brelse(fibh->sbh); | |
198 | brelse(epos.bh); | |
1da177e4 LT |
199 | return NULL; |
200 | } | |
201 | ||
202 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
203 | lfi = cfi->lengthFileIdent; | |
204 | ||
cb00ea35 | 205 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 206 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 207 | } else { |
1da177e4 LT |
208 | int poffset; /* Unpaded ending offset */ |
209 | ||
4b11111a MS |
210 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
211 | liu + lfi; | |
1da177e4 | 212 | |
4b11111a MS |
213 | if (poffset >= lfi) |
214 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
215 | poffset - lfi); | |
216 | else { | |
1da177e4 | 217 | nameptr = fname; |
4b11111a MS |
218 | memcpy(nameptr, fi->fileIdent + liu, |
219 | lfi - poffset); | |
220 | memcpy(nameptr + lfi - poffset, | |
221 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
222 | } |
223 | } | |
224 | ||
cb00ea35 CG |
225 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
226 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
227 | continue; |
228 | } | |
cb00ea35 CG |
229 | |
230 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
231 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
232 | continue; |
233 | } | |
234 | ||
235 | if (!lfi) | |
236 | continue; | |
237 | ||
4b11111a MS |
238 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
239 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
240 | dentry->d_name.name)) { | |
241 | brelse(epos.bh); | |
242 | return fi; | |
1da177e4 LT |
243 | } |
244 | } | |
28de7948 | 245 | |
1da177e4 | 246 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
247 | brelse(fibh->ebh); |
248 | brelse(fibh->sbh); | |
249 | brelse(epos.bh); | |
28de7948 | 250 | |
1da177e4 LT |
251 | return NULL; |
252 | } | |
253 | ||
cb00ea35 CG |
254 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
255 | struct nameidata *nd) | |
1da177e4 LT |
256 | { |
257 | struct inode *inode = NULL; | |
db9a369e | 258 | struct fileIdentDesc cfi; |
1da177e4 LT |
259 | struct udf_fileident_bh fibh; |
260 | ||
cb00ea35 | 261 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
262 | return ERR_PTR(-ENAMETOOLONG); |
263 | ||
264 | lock_kernel(); | |
265 | #ifdef UDF_RECOVERY | |
266 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 267 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
28de7948 CG |
268 | kernel_lb_addr lb = { |
269 | .logicalBlockNum = 0, | |
4b11111a MS |
270 | .partitionReferenceNum = |
271 | simple_strtoul(dentry->d_name.name + 3, | |
272 | NULL, 0), | |
28de7948 | 273 | }; |
1da177e4 | 274 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 275 | if (!inode) { |
1da177e4 LT |
276 | unlock_kernel(); |
277 | return ERR_PTR(-EACCES); | |
278 | } | |
4b11111a | 279 | } else |
28de7948 | 280 | #endif /* UDF_RECOVERY */ |
1da177e4 | 281 | |
cb00ea35 | 282 | if (udf_find_entry(dir, dentry, &fibh, &cfi)) { |
1da177e4 | 283 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
284 | brelse(fibh.ebh); |
285 | brelse(fibh.sbh); | |
1da177e4 LT |
286 | |
287 | inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); | |
cb00ea35 | 288 | if (!inode) { |
1da177e4 LT |
289 | unlock_kernel(); |
290 | return ERR_PTR(-EACCES); | |
291 | } | |
292 | } | |
293 | unlock_kernel(); | |
294 | d_add(dentry, inode); | |
28de7948 | 295 | |
1da177e4 LT |
296 | return NULL; |
297 | } | |
298 | ||
cb00ea35 CG |
299 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
300 | struct dentry *dentry, | |
301 | struct udf_fileident_bh *fibh, | |
302 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 303 | { |
6c79e987 | 304 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 305 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
306 | char name[UDF_NAME_LEN], fname[UDF_NAME_LEN]; |
307 | int namelen; | |
308 | loff_t f_pos; | |
309 | int flen; | |
310 | char *nameptr; | |
af793295 | 311 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
312 | int nfidlen; |
313 | uint8_t lfi; | |
314 | uint16_t liu; | |
315 | int block; | |
ff116fc8 JK |
316 | kernel_lb_addr eloc; |
317 | uint32_t elen; | |
60448b1d | 318 | sector_t offset; |
28de7948 | 319 | struct extent_position epos = {}; |
48d6d8ff | 320 | struct udf_inode_info *dinfo; |
1da177e4 | 321 | |
cb00ea35 CG |
322 | if (dentry) { |
323 | if (!dentry->d_name.len) { | |
1da177e4 LT |
324 | *err = -EINVAL; |
325 | return NULL; | |
326 | } | |
4b11111a MS |
327 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
328 | dentry->d_name.len); | |
329 | if (!namelen) { | |
1da177e4 LT |
330 | *err = -ENAMETOOLONG; |
331 | return NULL; | |
332 | } | |
28de7948 | 333 | } else { |
1da177e4 | 334 | namelen = 0; |
28de7948 | 335 | } |
1da177e4 LT |
336 | |
337 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
338 | ||
af793295 | 339 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 340 | |
af793295 | 341 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff MS |
342 | dinfo = UDF_I(dir); |
343 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 | 344 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 345 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
346 | &epos, &eloc, &elen, &offset) == |
347 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 348 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 349 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 350 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 351 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 352 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 353 | epos.offset -= sizeof(long_ad); |
4b11111a | 354 | } else |
1da177e4 LT |
355 | offset = 0; |
356 | ||
4b11111a MS |
357 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
358 | if (!fibh->sbh) { | |
3bf25cb4 | 359 | brelse(epos.bh); |
1da177e4 LT |
360 | *err = -EIO; |
361 | return NULL; | |
362 | } | |
363 | ||
48d6d8ff | 364 | block = dinfo->i_location.logicalBlockNum; |
cb00ea35 | 365 | } else { |
48d6d8ff | 366 | block = udf_get_lb_pblock(dir->i_sb, dinfo->i_location, 0); |
1da177e4 LT |
367 | fibh->sbh = fibh->ebh = NULL; |
368 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
369 | goto add; | |
370 | } | |
371 | ||
af793295 | 372 | while (f_pos < size) { |
cb00ea35 CG |
373 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
374 | &elen, &offset); | |
1da177e4 | 375 | |
cb00ea35 | 376 | if (!fi) { |
1da177e4 | 377 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
378 | brelse(fibh->ebh); |
379 | brelse(fibh->sbh); | |
380 | brelse(epos.bh); | |
1da177e4 LT |
381 | *err = -EIO; |
382 | return NULL; | |
383 | } | |
384 | ||
385 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
386 | lfi = cfi->lengthFileIdent; | |
387 | ||
4b11111a | 388 | if (fibh->sbh == fibh->ebh) |
1da177e4 | 389 | nameptr = fi->fileIdent + liu; |
4b11111a | 390 | else { |
1da177e4 LT |
391 | int poffset; /* Unpaded ending offset */ |
392 | ||
4b11111a MS |
393 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
394 | liu + lfi; | |
1da177e4 | 395 | |
4b11111a MS |
396 | if (poffset >= lfi) |
397 | nameptr = (char *)(fibh->ebh->b_data + | |
398 | poffset - lfi); | |
399 | else { | |
1da177e4 | 400 | nameptr = fname; |
4b11111a MS |
401 | memcpy(nameptr, fi->fileIdent + liu, |
402 | lfi - poffset); | |
403 | memcpy(nameptr + lfi - poffset, | |
404 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
405 | } |
406 | } | |
407 | ||
cb00ea35 | 408 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
409 | if (((sizeof(struct fileIdentDesc) + |
410 | liu + lfi + 3) & ~3) == nfidlen) { | |
3bf25cb4 | 411 | brelse(epos.bh); |
1da177e4 LT |
412 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
413 | cfi->fileVersionNum = cpu_to_le16(1); | |
414 | cfi->fileCharacteristics = 0; | |
415 | cfi->lengthFileIdent = namelen; | |
416 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
417 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
418 | name)) | |
1da177e4 | 419 | return fi; |
4b11111a | 420 | else { |
1da177e4 LT |
421 | *err = -EIO; |
422 | return NULL; | |
423 | } | |
424 | } | |
425 | } | |
426 | ||
427 | if (!lfi || !dentry) | |
428 | continue; | |
429 | ||
4b11111a MS |
430 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
431 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
432 | dentry->d_name.name)) { | |
1da177e4 | 433 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
434 | brelse(fibh->ebh); |
435 | brelse(fibh->sbh); | |
436 | brelse(epos.bh); | |
1da177e4 LT |
437 | *err = -EEXIST; |
438 | return NULL; | |
439 | } | |
440 | } | |
441 | ||
28de7948 | 442 | add: |
05343c4f JK |
443 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
444 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); | |
445 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
446 | epos.offset -= sizeof(short_ad); | |
447 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
448 | epos.offset -= sizeof(long_ad); | |
449 | udf_write_aext(dir, &epos, eloc, elen, 1); | |
450 | } | |
1da177e4 LT |
451 | f_pos += nfidlen; |
452 | ||
48d6d8ff | 453 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 454 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 455 | brelse(epos.bh); |
ff116fc8 | 456 | epos.bh = NULL; |
1da177e4 LT |
457 | fibh->soffset -= udf_ext0_offset(dir); |
458 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 459 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 460 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
461 | brelse(fibh->ebh); |
462 | brelse(fibh->sbh); | |
4b11111a MS |
463 | fibh->sbh = fibh->ebh = |
464 | udf_expand_dir_adinicb(dir, &block, err); | |
465 | if (!fibh->sbh) | |
1da177e4 | 466 | return NULL; |
48d6d8ff | 467 | epos.block = dinfo->i_location; |
ff116fc8 | 468 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
469 | /* Load extent udf_expand_dir_adinicb() has created */ |
470 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
471 | } |
472 | ||
cb00ea35 | 473 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
474 | fibh->soffset = fibh->eoffset; |
475 | fibh->eoffset += nfidlen; | |
cb00ea35 | 476 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 477 | brelse(fibh->sbh); |
1da177e4 LT |
478 | fibh->sbh = fibh->ebh; |
479 | } | |
480 | ||
48d6d8ff MS |
481 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
482 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 483 | fi = (struct fileIdentDesc *) |
48d6d8ff | 484 | (dinfo->i_ext.i_data + |
c0b34438 | 485 | fibh->soffset - |
4b11111a | 486 | udf_ext0_offset(dir) + |
48d6d8ff | 487 | dinfo->i_lenEAttr); |
cb00ea35 | 488 | } else { |
4b11111a MS |
489 | block = eloc.logicalBlockNum + |
490 | ((elen - 1) >> | |
491 | dir->i_sb->s_blocksize_bits); | |
492 | fi = (struct fileIdentDesc *) | |
493 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 494 | } |
cb00ea35 | 495 | } else { |
1da177e4 LT |
496 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
497 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 498 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 499 | brelse(fibh->sbh); |
1da177e4 LT |
500 | fibh->sbh = fibh->ebh; |
501 | } | |
502 | ||
503 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 504 | dir->i_sb->s_blocksize_bits); |
4b11111a | 505 | fibh->ebh = udf_bread(dir, |
af793295 | 506 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
28de7948 | 507 | if (!fibh->ebh) { |
3bf25cb4 JK |
508 | brelse(epos.bh); |
509 | brelse(fibh->sbh); | |
1da177e4 LT |
510 | return NULL; |
511 | } | |
512 | ||
28de7948 | 513 | if (!fibh->soffset) { |
ff116fc8 | 514 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 515 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 516 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 | 517 | dir->i_sb->s_blocksize_bits); |
4b11111a | 518 | } else |
cb00ea35 | 519 | block++; |
1da177e4 | 520 | |
3bf25cb4 | 521 | brelse(fibh->sbh); |
1da177e4 LT |
522 | fibh->sbh = fibh->ebh; |
523 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 524 | } else { |
1da177e4 | 525 | fi = (struct fileIdentDesc *) |
4b11111a MS |
526 | (fibh->sbh->b_data + sb->s_blocksize + |
527 | fibh->soffset); | |
1da177e4 LT |
528 | } |
529 | } | |
530 | ||
531 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 532 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a MS |
533 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
534 | sizeof(tag)); | |
1da177e4 | 535 | else |
4b11111a MS |
536 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
537 | sizeof(tag)); | |
1da177e4 LT |
538 | cfi->fileVersionNum = cpu_to_le16(1); |
539 | cfi->lengthFileIdent = namelen; | |
540 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 541 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
3bf25cb4 | 542 | brelse(epos.bh); |
1da177e4 | 543 | dir->i_size += nfidlen; |
48d6d8ff MS |
544 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
545 | dinfo->i_lenAlloc += nfidlen; | |
1da177e4 LT |
546 | mark_inode_dirty(dir); |
547 | return fi; | |
cb00ea35 | 548 | } else { |
3bf25cb4 | 549 | brelse(epos.bh); |
1da177e4 | 550 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
551 | brelse(fibh->ebh); |
552 | brelse(fibh->sbh); | |
1da177e4 LT |
553 | *err = -EIO; |
554 | return NULL; | |
555 | } | |
556 | } | |
557 | ||
558 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
559 | struct udf_fileident_bh *fibh, |
560 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
561 | { |
562 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 563 | |
1da177e4 LT |
564 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
565 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 566 | |
1da177e4 LT |
567 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
568 | } | |
569 | ||
cb00ea35 CG |
570 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
571 | struct nameidata *nd) | |
1da177e4 LT |
572 | { |
573 | struct udf_fileident_bh fibh; | |
574 | struct inode *inode; | |
575 | struct fileIdentDesc cfi, *fi; | |
576 | int err; | |
48d6d8ff | 577 | struct udf_inode_info *iinfo; |
1da177e4 LT |
578 | |
579 | lock_kernel(); | |
580 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 581 | if (!inode) { |
1da177e4 LT |
582 | unlock_kernel(); |
583 | return err; | |
584 | } | |
585 | ||
48d6d8ff MS |
586 | iinfo = UDF_I(inode); |
587 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
588 | inode->i_data.a_ops = &udf_adinicb_aops; |
589 | else | |
590 | inode->i_data.a_ops = &udf_aops; | |
591 | inode->i_op = &udf_file_inode_operations; | |
592 | inode->i_fop = &udf_file_operations; | |
593 | inode->i_mode = mode; | |
594 | mark_inode_dirty(inode); | |
595 | ||
4b11111a MS |
596 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
597 | if (!fi) { | |
cb00ea35 | 598 | inode->i_nlink--; |
1da177e4 LT |
599 | mark_inode_dirty(inode); |
600 | iput(inode); | |
601 | unlock_kernel(); | |
602 | return err; | |
603 | } | |
604 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 605 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 606 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 607 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 608 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 609 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 610 | mark_inode_dirty(dir); |
1da177e4 | 611 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
612 | brelse(fibh.ebh); |
613 | brelse(fibh.sbh); | |
1da177e4 LT |
614 | unlock_kernel(); |
615 | d_instantiate(dentry, inode); | |
28de7948 | 616 | |
1da177e4 LT |
617 | return 0; |
618 | } | |
619 | ||
cb00ea35 CG |
620 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
621 | dev_t rdev) | |
1da177e4 | 622 | { |
cb00ea35 | 623 | struct inode *inode; |
1da177e4 LT |
624 | struct udf_fileident_bh fibh; |
625 | struct fileIdentDesc cfi, *fi; | |
626 | int err; | |
48d6d8ff | 627 | struct udf_inode_info *iinfo; |
1da177e4 LT |
628 | |
629 | if (!old_valid_dev(rdev)) | |
630 | return -EINVAL; | |
631 | ||
632 | lock_kernel(); | |
633 | err = -EIO; | |
634 | inode = udf_new_inode(dir, mode, &err); | |
635 | if (!inode) | |
636 | goto out; | |
637 | ||
48d6d8ff | 638 | iinfo = UDF_I(inode); |
1da177e4 LT |
639 | inode->i_uid = current->fsuid; |
640 | init_special_inode(inode, mode, rdev); | |
4b11111a MS |
641 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
642 | if (!fi) { | |
cb00ea35 | 643 | inode->i_nlink--; |
1da177e4 LT |
644 | mark_inode_dirty(inode); |
645 | iput(inode); | |
646 | unlock_kernel(); | |
647 | return err; | |
648 | } | |
649 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 650 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 651 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 652 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 653 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 654 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 655 | mark_inode_dirty(dir); |
1da177e4 LT |
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; | |
48d6d8ff MS |
675 | struct udf_inode_info *dinfo = UDF_I(dir); |
676 | struct udf_inode_info *iinfo; | |
1da177e4 LT |
677 | |
678 | lock_kernel(); | |
679 | err = -EMLINK; | |
cb00ea35 | 680 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
681 | goto out; |
682 | ||
683 | err = -EIO; | |
684 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
685 | if (!inode) | |
686 | goto out; | |
687 | ||
48d6d8ff | 688 | iinfo = UDF_I(inode); |
1da177e4 LT |
689 | inode->i_op = &udf_dir_inode_operations; |
690 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
691 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
692 | if (!fi) { | |
1da177e4 LT |
693 | inode->i_nlink--; |
694 | mark_inode_dirty(inode); | |
695 | iput(inode); | |
696 | goto out; | |
697 | } | |
698 | inode->i_nlink = 2; | |
699 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 700 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 701 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 702 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
703 | cfi.fileCharacteristics = |
704 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 705 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 706 | brelse(fibh.sbh); |
1da177e4 LT |
707 | inode->i_mode = S_IFDIR | mode; |
708 | if (dir->i_mode & S_ISGID) | |
709 | inode->i_mode |= S_ISGID; | |
710 | mark_inode_dirty(inode); | |
711 | ||
4b11111a MS |
712 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
713 | if (!fi) { | |
1da177e4 LT |
714 | inode->i_nlink = 0; |
715 | mark_inode_dirty(inode); | |
716 | iput(inode); | |
717 | goto out; | |
718 | } | |
719 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 720 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 721 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 722 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
723 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
724 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 725 | inc_nlink(dir); |
1da177e4 LT |
726 | mark_inode_dirty(dir); |
727 | d_instantiate(dentry, inode); | |
728 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
729 | brelse(fibh.ebh); |
730 | brelse(fibh.sbh); | |
1da177e4 | 731 | err = 0; |
28de7948 CG |
732 | |
733 | out: | |
1da177e4 LT |
734 | unlock_kernel(); |
735 | return err; | |
736 | } | |
737 | ||
738 | static int empty_dir(struct inode *dir) | |
739 | { | |
740 | struct fileIdentDesc *fi, cfi; | |
741 | struct udf_fileident_bh fibh; | |
742 | loff_t f_pos; | |
af793295 | 743 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 744 | int block; |
ff116fc8 JK |
745 | kernel_lb_addr eloc; |
746 | uint32_t elen; | |
60448b1d | 747 | sector_t offset; |
28de7948 | 748 | struct extent_position epos = {}; |
48d6d8ff | 749 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 750 | |
af793295 JK |
751 | f_pos = udf_ext0_offset(dir); |
752 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 753 | |
48d6d8ff | 754 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 755 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 756 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
757 | &epos, &eloc, &elen, &offset) == |
758 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 759 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 760 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 761 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 762 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 763 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 764 | epos.offset -= sizeof(long_ad); |
4b11111a | 765 | } else |
1da177e4 LT |
766 | offset = 0; |
767 | ||
4b11111a MS |
768 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
769 | if (!fibh.sbh) { | |
3bf25cb4 | 770 | brelse(epos.bh); |
1da177e4 LT |
771 | return 0; |
772 | } | |
cb00ea35 | 773 | } else { |
3bf25cb4 | 774 | brelse(epos.bh); |
1da177e4 LT |
775 | return 0; |
776 | } | |
777 | ||
af793295 | 778 | while (f_pos < size) { |
cb00ea35 CG |
779 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
780 | &elen, &offset); | |
cb00ea35 | 781 | if (!fi) { |
1da177e4 | 782 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
783 | brelse(fibh.ebh); |
784 | brelse(fibh.sbh); | |
785 | brelse(epos.bh); | |
1da177e4 LT |
786 | return 0; |
787 | } | |
788 | ||
28de7948 CG |
789 | if (cfi.lengthFileIdent && |
790 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 791 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
792 | brelse(fibh.ebh); |
793 | brelse(fibh.sbh); | |
794 | brelse(epos.bh); | |
1da177e4 LT |
795 | return 0; |
796 | } | |
797 | } | |
28de7948 | 798 | |
1da177e4 | 799 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
800 | brelse(fibh.ebh); |
801 | brelse(fibh.sbh); | |
802 | brelse(epos.bh); | |
28de7948 | 803 | |
1da177e4 LT |
804 | return 1; |
805 | } | |
806 | ||
cb00ea35 | 807 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
808 | { |
809 | int retval; | |
cb00ea35 | 810 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
811 | struct udf_fileident_bh fibh; |
812 | struct fileIdentDesc *fi, cfi; | |
813 | kernel_lb_addr tloc; | |
814 | ||
815 | retval = -ENOENT; | |
816 | lock_kernel(); | |
817 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
818 | if (!fi) | |
819 | goto out; | |
820 | ||
821 | retval = -EIO; | |
822 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
823 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
824 | goto end_rmdir; | |
825 | retval = -ENOTEMPTY; | |
826 | if (!empty_dir(inode)) | |
827 | goto end_rmdir; | |
828 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
829 | if (retval) | |
830 | goto end_rmdir; | |
831 | if (inode->i_nlink != 2) | |
832 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
833 | "empty directory has nlink != 2 (%d)", |
834 | inode->i_nlink); | |
ce71ec36 | 835 | clear_nlink(inode); |
1da177e4 | 836 | inode->i_size = 0; |
c007c06e | 837 | inode_dec_link_count(dir); |
4b11111a MS |
838 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
839 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
840 | mark_inode_dirty(dir); |
841 | ||
28de7948 | 842 | end_rmdir: |
1da177e4 | 843 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
844 | brelse(fibh.ebh); |
845 | brelse(fibh.sbh); | |
28de7948 CG |
846 | |
847 | out: | |
1da177e4 LT |
848 | unlock_kernel(); |
849 | return retval; | |
850 | } | |
851 | ||
cb00ea35 | 852 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
853 | { |
854 | int retval; | |
cb00ea35 | 855 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
856 | struct udf_fileident_bh fibh; |
857 | struct fileIdentDesc *fi; | |
858 | struct fileIdentDesc cfi; | |
859 | kernel_lb_addr tloc; | |
860 | ||
861 | retval = -ENOENT; | |
862 | lock_kernel(); | |
863 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
864 | if (!fi) | |
865 | goto out; | |
866 | ||
867 | retval = -EIO; | |
868 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
869 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
870 | goto end_unlink; | |
871 | ||
cb00ea35 | 872 | if (!inode->i_nlink) { |
1da177e4 | 873 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 874 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
875 | inode->i_nlink = 1; |
876 | } | |
877 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
878 | if (retval) | |
879 | goto end_unlink; | |
880 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
881 | mark_inode_dirty(dir); | |
9a53c3a7 | 882 | inode_dec_link_count(inode); |
1da177e4 LT |
883 | inode->i_ctime = dir->i_ctime; |
884 | retval = 0; | |
885 | ||
28de7948 | 886 | end_unlink: |
1da177e4 | 887 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
888 | brelse(fibh.ebh); |
889 | brelse(fibh.sbh); | |
28de7948 CG |
890 | |
891 | out: | |
1da177e4 LT |
892 | unlock_kernel(); |
893 | return retval; | |
894 | } | |
895 | ||
cb00ea35 CG |
896 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
897 | const char *symname) | |
1da177e4 | 898 | { |
cb00ea35 | 899 | struct inode *inode; |
1da177e4 LT |
900 | struct pathComponent *pc; |
901 | char *compstart; | |
902 | struct udf_fileident_bh fibh; | |
28de7948 | 903 | struct extent_position epos = {}; |
1da177e4 LT |
904 | int eoffset, elen = 0; |
905 | struct fileIdentDesc *fi; | |
906 | struct fileIdentDesc cfi; | |
907 | char *ea; | |
908 | int err; | |
909 | int block; | |
910 | char name[UDF_NAME_LEN]; | |
911 | int namelen; | |
6c79e987 | 912 | struct buffer_head *bh; |
48d6d8ff | 913 | struct udf_inode_info *iinfo; |
1da177e4 LT |
914 | |
915 | lock_kernel(); | |
4b11111a MS |
916 | inode = udf_new_inode(dir, S_IFLNK, &err); |
917 | if (!inode) | |
1da177e4 LT |
918 | goto out; |
919 | ||
48d6d8ff | 920 | iinfo = UDF_I(inode); |
1da177e4 LT |
921 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
922 | inode->i_data.a_ops = &udf_symlink_aops; | |
923 | inode->i_op = &page_symlink_inode_operations; | |
924 | ||
48d6d8ff | 925 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 JK |
926 | kernel_lb_addr eloc; |
927 | uint32_t elen; | |
1da177e4 LT |
928 | |
929 | block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
930 | iinfo->i_location.partitionReferenceNum, |
931 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
932 | if (!block) |
933 | goto out_no_entry; | |
48d6d8ff | 934 | epos.block = iinfo->i_location; |
ff116fc8 JK |
935 | epos.offset = udf_file_entry_alloc_offset(inode); |
936 | epos.bh = NULL; | |
1da177e4 | 937 | eloc.logicalBlockNum = block; |
4b11111a | 938 | eloc.partitionReferenceNum = |
48d6d8ff | 939 | iinfo->i_location.partitionReferenceNum; |
1da177e4 | 940 | elen = inode->i_sb->s_blocksize; |
48d6d8ff | 941 | iinfo->i_lenExtents = elen; |
ff116fc8 | 942 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 943 | brelse(epos.bh); |
1da177e4 LT |
944 | |
945 | block = udf_get_pblock(inode->i_sb, block, | |
48d6d8ff | 946 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 947 | 0); |
ff116fc8 JK |
948 | epos.bh = udf_tread(inode->i_sb, block); |
949 | lock_buffer(epos.bh); | |
950 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
951 | set_buffer_uptodate(epos.bh); | |
952 | unlock_buffer(epos.bh); | |
953 | mark_buffer_dirty_inode(epos.bh, inode); | |
954 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
955 | } else |
956 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 LT |
957 | |
958 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
959 | pc = (struct pathComponent *)ea; | |
960 | ||
cb00ea35 CG |
961 | if (*symname == '/') { |
962 | do { | |
1da177e4 LT |
963 | symname++; |
964 | } while (*symname == '/'); | |
965 | ||
966 | pc->componentType = 1; | |
967 | pc->lengthComponentIdent = 0; | |
968 | pc->componentFileVersionNum = 0; | |
969 | pc += sizeof(struct pathComponent); | |
970 | elen += sizeof(struct pathComponent); | |
971 | } | |
972 | ||
973 | err = -ENAMETOOLONG; | |
974 | ||
cb00ea35 | 975 | while (*symname) { |
1da177e4 LT |
976 | if (elen + sizeof(struct pathComponent) > eoffset) |
977 | goto out_no_entry; | |
978 | ||
979 | pc = (struct pathComponent *)(ea + elen); | |
980 | ||
981 | compstart = (char *)symname; | |
982 | ||
cb00ea35 | 983 | do { |
1da177e4 LT |
984 | symname++; |
985 | } while (*symname && *symname != '/'); | |
986 | ||
987 | pc->componentType = 5; | |
988 | pc->lengthComponentIdent = 0; | |
989 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
990 | if (compstart[0] == '.') { |
991 | if ((symname - compstart) == 1) | |
1da177e4 | 992 | pc->componentType = 4; |
4b11111a MS |
993 | else if ((symname - compstart) == 2 && |
994 | compstart[1] == '.') | |
1da177e4 LT |
995 | pc->componentType = 3; |
996 | } | |
997 | ||
cb00ea35 | 998 | if (pc->componentType == 5) { |
28de7948 CG |
999 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
1000 | symname - compstart); | |
1001 | if (!namelen) | |
1da177e4 LT |
1002 | goto out_no_entry; |
1003 | ||
4b11111a MS |
1004 | if (elen + sizeof(struct pathComponent) + namelen > |
1005 | eoffset) | |
1da177e4 LT |
1006 | goto out_no_entry; |
1007 | else | |
1008 | pc->lengthComponentIdent = namelen; | |
1009 | ||
1010 | memcpy(pc->componentIdent, name, namelen); | |
1011 | } | |
1012 | ||
1013 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1014 | ||
cb00ea35 CG |
1015 | if (*symname) { |
1016 | do { | |
1da177e4 LT |
1017 | symname++; |
1018 | } while (*symname == '/'); | |
1019 | } | |
1020 | } | |
1021 | ||
3bf25cb4 | 1022 | brelse(epos.bh); |
1da177e4 | 1023 | inode->i_size = elen; |
48d6d8ff MS |
1024 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1025 | iinfo->i_lenAlloc = inode->i_size; | |
1da177e4 LT |
1026 | mark_inode_dirty(inode); |
1027 | ||
4b11111a MS |
1028 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1029 | if (!fi) | |
1da177e4 LT |
1030 | goto out_no_entry; |
1031 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 1032 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
6c79e987 MS |
1033 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1034 | if (bh) { | |
4b11111a MS |
1035 | struct logicalVolIntegrityDesc *lvid = |
1036 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1037 | struct logicalVolHeaderDesc *lvhd; |
1038 | uint64_t uniqueID; | |
4b11111a MS |
1039 | lvhd = (struct logicalVolHeaderDesc *) |
1040 | lvid->logicalVolContentsUse; | |
1da177e4 | 1041 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1042 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1043 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1044 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1045 | uniqueID += 16; | |
1046 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1047 | mark_buffer_dirty(bh); |
1da177e4 LT |
1048 | } |
1049 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1050 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1051 | mark_inode_dirty(dir); |
1da177e4 | 1052 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1053 | brelse(fibh.ebh); |
1054 | brelse(fibh.sbh); | |
1da177e4 LT |
1055 | d_instantiate(dentry, inode); |
1056 | err = 0; | |
1057 | ||
28de7948 | 1058 | out: |
1da177e4 LT |
1059 | unlock_kernel(); |
1060 | return err; | |
1061 | ||
28de7948 | 1062 | out_no_entry: |
9a53c3a7 | 1063 | inode_dec_link_count(inode); |
1da177e4 LT |
1064 | iput(inode); |
1065 | goto out; | |
1066 | } | |
1067 | ||
cb00ea35 CG |
1068 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1069 | struct dentry *dentry) | |
1da177e4 LT |
1070 | { |
1071 | struct inode *inode = old_dentry->d_inode; | |
1072 | struct udf_fileident_bh fibh; | |
1073 | struct fileIdentDesc cfi, *fi; | |
1074 | int err; | |
6c79e987 | 1075 | struct buffer_head *bh; |
1da177e4 LT |
1076 | |
1077 | lock_kernel(); | |
cb00ea35 | 1078 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1079 | unlock_kernel(); |
1080 | return -EMLINK; | |
1081 | } | |
1082 | ||
4b11111a MS |
1083 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1084 | if (!fi) { | |
1da177e4 LT |
1085 | unlock_kernel(); |
1086 | return err; | |
1087 | } | |
1088 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1089 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1090 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1091 | if (bh) { | |
4b11111a MS |
1092 | struct logicalVolIntegrityDesc *lvid = |
1093 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1094 | struct logicalVolHeaderDesc *lvhd; |
1095 | uint64_t uniqueID; | |
4b11111a MS |
1096 | lvhd = (struct logicalVolHeaderDesc *) |
1097 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1098 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1099 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1100 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1101 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1102 | uniqueID += 16; | |
1103 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1104 | mark_buffer_dirty(bh); |
1da177e4 LT |
1105 | } |
1106 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1107 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1108 | mark_inode_dirty(dir); |
28de7948 | 1109 | |
1da177e4 | 1110 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1111 | brelse(fibh.ebh); |
1112 | brelse(fibh.sbh); | |
d8c76e6f | 1113 | inc_nlink(inode); |
1da177e4 LT |
1114 | inode->i_ctime = current_fs_time(inode->i_sb); |
1115 | mark_inode_dirty(inode); | |
1116 | atomic_inc(&inode->i_count); | |
1117 | d_instantiate(dentry, inode); | |
1118 | unlock_kernel(); | |
28de7948 | 1119 | |
1da177e4 LT |
1120 | return 0; |
1121 | } | |
1122 | ||
1123 | /* Anybody can rename anything with this: the permission checks are left to the | |
1124 | * higher-level routines. | |
1125 | */ | |
cb00ea35 CG |
1126 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1127 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1128 | { |
cb00ea35 CG |
1129 | struct inode *old_inode = old_dentry->d_inode; |
1130 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1131 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1132 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1133 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1134 | struct buffer_head *dir_bh = NULL; |
1135 | int retval = -ENOENT; | |
1136 | kernel_lb_addr tloc; | |
48d6d8ff | 1137 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 LT |
1138 | |
1139 | lock_kernel(); | |
4b11111a MS |
1140 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); |
1141 | if (ofi) { | |
1da177e4 | 1142 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1143 | brelse(ofibh.ebh); |
1144 | brelse(ofibh.sbh); | |
1da177e4 LT |
1145 | } |
1146 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1147 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1148 | != old_inode->i_ino) |
1da177e4 LT |
1149 | goto end_rename; |
1150 | ||
1151 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1152 | if (nfi) { |
1153 | if (!new_inode) { | |
1da177e4 | 1154 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1155 | brelse(nfibh.ebh); |
1156 | brelse(nfibh.sbh); | |
1da177e4 LT |
1157 | nfi = NULL; |
1158 | } | |
1159 | } | |
cb00ea35 | 1160 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1161 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1162 | |
cb00ea35 | 1163 | if (new_inode) { |
1da177e4 LT |
1164 | retval = -ENOTEMPTY; |
1165 | if (!empty_dir(new_inode)) | |
1166 | goto end_rename; | |
1167 | } | |
1168 | retval = -EIO; | |
48d6d8ff | 1169 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1170 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1171 | old_iinfo->i_ext.i_data - |
1172 | (old_iinfo->i_efe ? | |
4b11111a MS |
1173 | sizeof(struct extendedFileEntry) : |
1174 | sizeof(struct fileEntry)), | |
1175 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1176 | } else { |
1da177e4 LT |
1177 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1178 | if (!dir_bh) | |
1179 | goto end_rename; | |
4b11111a MS |
1180 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1181 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1182 | } |
1183 | if (!dir_fi) | |
1184 | goto end_rename; | |
1185 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
4b11111a MS |
1186 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != |
1187 | old_dir->i_ino) | |
1da177e4 LT |
1188 | goto end_rename; |
1189 | ||
1190 | retval = -EMLINK; | |
4b11111a MS |
1191 | if (!new_inode && |
1192 | new_dir->i_nlink >= | |
1193 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1194 | goto end_rename; |
1195 | } | |
cb00ea35 | 1196 | if (!nfi) { |
4b11111a MS |
1197 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1198 | &retval); | |
1da177e4 LT |
1199 | if (!nfi) |
1200 | goto end_rename; | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * Like most other Unix systems, set the ctime for inodes on a | |
1205 | * rename. | |
1206 | */ | |
1207 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1208 | mark_inode_dirty(old_inode); | |
1209 | ||
1210 | /* | |
1211 | * ok, that's it | |
1212 | */ | |
1213 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1214 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1215 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1216 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1217 | ||
1218 | /* The old fid may have moved - find it again */ | |
1219 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1220 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1221 | ||
cb00ea35 | 1222 | if (new_inode) { |
1da177e4 | 1223 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1224 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1225 | } |
1226 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1227 | mark_inode_dirty(old_dir); | |
1228 | ||
cb00ea35 | 1229 | if (dir_fi) { |
c0b34438 | 1230 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1231 | udf_update_tag((char *)dir_fi, |
1232 | (sizeof(struct fileIdentDesc) + | |
1233 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1234 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1235 | mark_inode_dirty(old_inode); |
4b11111a | 1236 | else |
1da177e4 | 1237 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1238 | |
9a53c3a7 | 1239 | inode_dec_link_count(old_dir); |
4b11111a | 1240 | if (new_inode) |
9a53c3a7 | 1241 | inode_dec_link_count(new_inode); |
4b11111a | 1242 | else { |
d8c76e6f | 1243 | inc_nlink(new_dir); |
1da177e4 LT |
1244 | mark_inode_dirty(new_dir); |
1245 | } | |
1246 | } | |
1247 | ||
cb00ea35 | 1248 | if (ofi) { |
1da177e4 | 1249 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1250 | brelse(ofibh.ebh); |
1251 | brelse(ofibh.sbh); | |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | retval = 0; | |
1255 | ||
28de7948 | 1256 | end_rename: |
3bf25cb4 | 1257 | brelse(dir_bh); |
cb00ea35 | 1258 | if (nfi) { |
1da177e4 | 1259 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1260 | brelse(nfibh.ebh); |
1261 | brelse(nfibh.sbh); | |
1da177e4 LT |
1262 | } |
1263 | unlock_kernel(); | |
28de7948 | 1264 | |
1da177e4 LT |
1265 | return retval; |
1266 | } | |
1267 | ||
c5ef1c42 | 1268 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1269 | .lookup = udf_lookup, |
1270 | .create = udf_create, | |
1271 | .link = udf_link, | |
1272 | .unlink = udf_unlink, | |
1273 | .symlink = udf_symlink, | |
1274 | .mkdir = udf_mkdir, | |
1275 | .rmdir = udf_rmdir, | |
1276 | .mknod = udf_mknod, | |
1277 | .rename = udf_rename, | |
1da177e4 | 1278 | }; |