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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * namei.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998-2004 Ben Fennema | |
14 | * (C) 1999-2000 Stelias Computing Inc | |
15 | * | |
16 | * HISTORY | |
17 | * | |
18 | * 12/12/98 blf Created. Split out the lookup code from dir.c | |
19 | * 04/19/99 blf link, mknod, symlink support | |
20 | */ | |
21 | ||
22 | #include "udfdecl.h" | |
23 | ||
24 | #include "udf_i.h" | |
25 | #include "udf_sb.h" | |
26 | #include <linux/string.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/quotaops.h> | |
31 | #include <linux/smp_lock.h> | |
32 | #include <linux/buffer_head.h> | |
e8edc6e0 | 33 | #include <linux/sched.h> |
1da177e4 | 34 | |
cb00ea35 CG |
35 | static inline int udf_match(int len1, const char *name1, int len2, |
36 | const char *name2) | |
1da177e4 LT |
37 | { |
38 | if (len1 != len2) | |
39 | return 0; | |
28de7948 | 40 | |
1da177e4 LT |
41 | return !memcmp(name1, name2, len1); |
42 | } | |
43 | ||
44 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 | 45 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
4b11111a | 46 | uint8_t *impuse, uint8_t *fileident) |
1da177e4 LT |
47 | { |
48 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag); | |
49 | uint16_t crc; | |
1da177e4 LT |
50 | int offset; |
51 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
52 | uint8_t lfi = cfi->lengthFileIdent; | |
53 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
28de7948 | 54 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
55 | int adinicb = 0; |
56 | ||
c0b34438 | 57 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 LT |
58 | adinicb = 1; |
59 | ||
60 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
61 | ||
cb00ea35 | 62 | if (impuse) { |
28de7948 CG |
63 | if (adinicb || (offset + liu < 0)) { |
64 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
65 | } else if (offset >= 0) { | |
1da177e4 | 66 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
28de7948 CG |
67 | } else { |
68 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
4b11111a MS |
69 | memcpy(fibh->ebh->b_data, impuse - offset, |
70 | liu + offset); | |
1da177e4 LT |
71 | } |
72 | } | |
73 | ||
74 | offset += liu; | |
75 | ||
cb00ea35 | 76 | if (fileident) { |
28de7948 CG |
77 | if (adinicb || (offset + lfi < 0)) { |
78 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
79 | } else if (offset >= 0) { | |
1da177e4 | 80 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 81 | } else { |
4b11111a MS |
82 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
83 | -offset); | |
84 | memcpy(fibh->ebh->b_data, fileident - offset, | |
85 | lfi + offset); | |
1da177e4 LT |
86 | } |
87 | } | |
88 | ||
89 | offset += lfi; | |
90 | ||
28de7948 CG |
91 | if (adinicb || (offset + padlen < 0)) { |
92 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
93 | } else if (offset >= 0) { | |
1da177e4 | 94 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
95 | } else { |
96 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
97 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
98 | } | |
99 | ||
28de7948 CG |
100 | crc = udf_crc((uint8_t *)cfi + sizeof(tag), |
101 | sizeof(struct fileIdentDesc) - sizeof(tag), 0); | |
102 | ||
103 | if (fibh->sbh == fibh->ebh) { | |
104 | crc = udf_crc((uint8_t *)sfi->impUse, | |
4b11111a MS |
105 | crclen + sizeof(tag) - |
106 | sizeof(struct fileIdentDesc), crc); | |
28de7948 | 107 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
4b11111a MS |
108 | crc = udf_crc(fibh->ebh->b_data + |
109 | sizeof(struct fileIdentDesc) + | |
110 | fibh->soffset, | |
111 | crclen + sizeof(tag) - | |
112 | sizeof(struct fileIdentDesc), | |
113 | crc); | |
28de7948 CG |
114 | } else { |
115 | crc = udf_crc((uint8_t *)sfi->impUse, | |
4b11111a MS |
116 | -fibh->soffset - sizeof(struct fileIdentDesc), |
117 | crc); | |
1da177e4 LT |
118 | crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc); |
119 | } | |
120 | ||
121 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
122 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
3f2587bb | 123 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
1da177e4 | 124 | |
28de7948 | 125 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
4b11111a MS |
126 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
127 | sizeof(struct fileIdentDesc)); | |
28de7948 CG |
128 | } else { |
129 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
130 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 131 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
132 | } |
133 | ||
28de7948 | 134 | if (adinicb) { |
1da177e4 | 135 | mark_inode_dirty(inode); |
28de7948 | 136 | } else { |
1da177e4 LT |
137 | if (fibh->sbh != fibh->ebh) |
138 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
139 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
140 | } | |
141 | return 0; | |
142 | } | |
143 | ||
cb00ea35 CG |
144 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
145 | struct dentry *dentry, | |
146 | struct udf_fileident_bh *fibh, | |
147 | struct fileIdentDesc *cfi) | |
1da177e4 | 148 | { |
cb00ea35 | 149 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
150 | loff_t f_pos; |
151 | int block, flen; | |
152 | char fname[UDF_NAME_LEN]; | |
153 | char *nameptr; | |
154 | uint8_t lfi; | |
155 | uint16_t liu; | |
ec471dc4 | 156 | loff_t size; |
ff116fc8 JK |
157 | kernel_lb_addr eloc; |
158 | uint32_t elen; | |
60448b1d | 159 | sector_t offset; |
28de7948 | 160 | struct extent_position epos = {}; |
48d6d8ff | 161 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 162 | |
af793295 JK |
163 | size = udf_ext0_offset(dir) + dir->i_size; |
164 | f_pos = udf_ext0_offset(dir); | |
1da177e4 | 165 | |
af793295 | 166 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 167 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 168 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 169 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
170 | &epos, &eloc, &elen, &offset) == |
171 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 172 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 173 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 174 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 175 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 176 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 177 | epos.offset -= sizeof(long_ad); |
4b11111a | 178 | } else |
1da177e4 LT |
179 | offset = 0; |
180 | ||
4b11111a MS |
181 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
182 | if (!fibh->sbh) { | |
3bf25cb4 | 183 | brelse(epos.bh); |
1da177e4 LT |
184 | return NULL; |
185 | } | |
cb00ea35 | 186 | } else { |
3bf25cb4 | 187 | brelse(epos.bh); |
1da177e4 LT |
188 | return NULL; |
189 | } | |
190 | ||
af793295 | 191 | while (f_pos < size) { |
cb00ea35 CG |
192 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
193 | &elen, &offset); | |
cb00ea35 | 194 | if (!fi) { |
1da177e4 | 195 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
196 | brelse(fibh->ebh); |
197 | brelse(fibh->sbh); | |
198 | brelse(epos.bh); | |
1da177e4 LT |
199 | return NULL; |
200 | } | |
201 | ||
202 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
203 | lfi = cfi->lengthFileIdent; | |
204 | ||
cb00ea35 | 205 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 206 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 207 | } else { |
1da177e4 LT |
208 | int poffset; /* Unpaded ending offset */ |
209 | ||
4b11111a MS |
210 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
211 | liu + lfi; | |
1da177e4 | 212 | |
4b11111a MS |
213 | if (poffset >= lfi) |
214 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
215 | poffset - lfi); | |
216 | else { | |
1da177e4 | 217 | nameptr = fname; |
4b11111a MS |
218 | memcpy(nameptr, fi->fileIdent + liu, |
219 | lfi - poffset); | |
220 | memcpy(nameptr + lfi - poffset, | |
221 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
222 | } |
223 | } | |
224 | ||
cb00ea35 CG |
225 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
226 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
227 | continue; |
228 | } | |
cb00ea35 CG |
229 | |
230 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
231 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
232 | continue; |
233 | } | |
234 | ||
235 | if (!lfi) | |
236 | continue; | |
237 | ||
4b11111a MS |
238 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
239 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
240 | dentry->d_name.name)) { | |
241 | brelse(epos.bh); | |
242 | return fi; | |
1da177e4 LT |
243 | } |
244 | } | |
28de7948 | 245 | |
1da177e4 | 246 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
247 | brelse(fibh->ebh); |
248 | brelse(fibh->sbh); | |
249 | brelse(epos.bh); | |
28de7948 | 250 | |
1da177e4 LT |
251 | return NULL; |
252 | } | |
253 | ||
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; |
9bf2c6b8 | 306 | char name[UDF_NAME_LEN]; |
1da177e4 LT |
307 | int namelen; |
308 | loff_t f_pos; | |
af793295 | 309 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
310 | int nfidlen; |
311 | uint8_t lfi; | |
312 | uint16_t liu; | |
313 | int block; | |
ff116fc8 JK |
314 | kernel_lb_addr eloc; |
315 | uint32_t elen; | |
60448b1d | 316 | sector_t offset; |
28de7948 | 317 | struct extent_position epos = {}; |
48d6d8ff | 318 | struct udf_inode_info *dinfo; |
1da177e4 | 319 | |
cb00ea35 CG |
320 | if (dentry) { |
321 | if (!dentry->d_name.len) { | |
1da177e4 LT |
322 | *err = -EINVAL; |
323 | return NULL; | |
324 | } | |
4b11111a MS |
325 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
326 | dentry->d_name.len); | |
327 | if (!namelen) { | |
1da177e4 LT |
328 | *err = -ENAMETOOLONG; |
329 | return NULL; | |
330 | } | |
28de7948 | 331 | } else { |
1da177e4 | 332 | namelen = 0; |
28de7948 | 333 | } |
1da177e4 LT |
334 | |
335 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
336 | ||
af793295 | 337 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 338 | |
af793295 | 339 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff MS |
340 | dinfo = UDF_I(dir); |
341 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 | 342 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 343 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
344 | &epos, &eloc, &elen, &offset) == |
345 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 346 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 347 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 348 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 349 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 350 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 351 | epos.offset -= sizeof(long_ad); |
4b11111a | 352 | } else |
1da177e4 LT |
353 | offset = 0; |
354 | ||
4b11111a MS |
355 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
356 | if (!fibh->sbh) { | |
3bf25cb4 | 357 | brelse(epos.bh); |
1da177e4 LT |
358 | *err = -EIO; |
359 | return NULL; | |
360 | } | |
361 | ||
48d6d8ff | 362 | block = dinfo->i_location.logicalBlockNum; |
cb00ea35 | 363 | } else { |
48d6d8ff | 364 | block = udf_get_lb_pblock(dir->i_sb, dinfo->i_location, 0); |
1da177e4 LT |
365 | fibh->sbh = fibh->ebh = NULL; |
366 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
367 | goto add; | |
368 | } | |
369 | ||
af793295 | 370 | while (f_pos < size) { |
cb00ea35 CG |
371 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
372 | &elen, &offset); | |
1da177e4 | 373 | |
cb00ea35 | 374 | if (!fi) { |
1da177e4 | 375 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
376 | brelse(fibh->ebh); |
377 | brelse(fibh->sbh); | |
378 | brelse(epos.bh); | |
1da177e4 LT |
379 | *err = -EIO; |
380 | return NULL; | |
381 | } | |
382 | ||
383 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
384 | lfi = cfi->lengthFileIdent; | |
385 | ||
cb00ea35 | 386 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
387 | if (((sizeof(struct fileIdentDesc) + |
388 | liu + lfi + 3) & ~3) == nfidlen) { | |
3bf25cb4 | 389 | brelse(epos.bh); |
1da177e4 LT |
390 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
391 | cfi->fileVersionNum = cpu_to_le16(1); | |
392 | cfi->fileCharacteristics = 0; | |
393 | cfi->lengthFileIdent = namelen; | |
394 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
395 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
396 | name)) | |
1da177e4 | 397 | return fi; |
4b11111a | 398 | else { |
1da177e4 LT |
399 | *err = -EIO; |
400 | return NULL; | |
401 | } | |
402 | } | |
403 | } | |
1da177e4 LT |
404 | } |
405 | ||
28de7948 | 406 | add: |
05343c4f JK |
407 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
408 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); | |
409 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
410 | epos.offset -= sizeof(short_ad); | |
411 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
412 | epos.offset -= sizeof(long_ad); | |
413 | udf_write_aext(dir, &epos, eloc, elen, 1); | |
414 | } | |
1da177e4 LT |
415 | f_pos += nfidlen; |
416 | ||
48d6d8ff | 417 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 418 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 419 | brelse(epos.bh); |
ff116fc8 | 420 | epos.bh = NULL; |
1da177e4 LT |
421 | fibh->soffset -= udf_ext0_offset(dir); |
422 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 423 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 424 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
425 | brelse(fibh->ebh); |
426 | brelse(fibh->sbh); | |
4b11111a MS |
427 | fibh->sbh = fibh->ebh = |
428 | udf_expand_dir_adinicb(dir, &block, err); | |
429 | if (!fibh->sbh) | |
1da177e4 | 430 | return NULL; |
48d6d8ff | 431 | epos.block = dinfo->i_location; |
ff116fc8 | 432 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
433 | /* Load extent udf_expand_dir_adinicb() has created */ |
434 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
435 | } |
436 | ||
cb00ea35 | 437 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
438 | fibh->soffset = fibh->eoffset; |
439 | fibh->eoffset += nfidlen; | |
cb00ea35 | 440 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 441 | brelse(fibh->sbh); |
1da177e4 LT |
442 | fibh->sbh = fibh->ebh; |
443 | } | |
444 | ||
48d6d8ff MS |
445 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
446 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 447 | fi = (struct fileIdentDesc *) |
48d6d8ff | 448 | (dinfo->i_ext.i_data + |
c0b34438 | 449 | fibh->soffset - |
4b11111a | 450 | udf_ext0_offset(dir) + |
48d6d8ff | 451 | dinfo->i_lenEAttr); |
cb00ea35 | 452 | } else { |
4b11111a MS |
453 | block = eloc.logicalBlockNum + |
454 | ((elen - 1) >> | |
455 | dir->i_sb->s_blocksize_bits); | |
456 | fi = (struct fileIdentDesc *) | |
457 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 458 | } |
cb00ea35 | 459 | } else { |
1da177e4 LT |
460 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
461 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 462 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 463 | brelse(fibh->sbh); |
1da177e4 LT |
464 | fibh->sbh = fibh->ebh; |
465 | } | |
466 | ||
467 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 468 | dir->i_sb->s_blocksize_bits); |
4b11111a | 469 | fibh->ebh = udf_bread(dir, |
af793295 | 470 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
28de7948 | 471 | if (!fibh->ebh) { |
3bf25cb4 JK |
472 | brelse(epos.bh); |
473 | brelse(fibh->sbh); | |
1da177e4 LT |
474 | return NULL; |
475 | } | |
476 | ||
28de7948 | 477 | if (!fibh->soffset) { |
ff116fc8 | 478 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 479 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 480 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 | 481 | dir->i_sb->s_blocksize_bits); |
4b11111a | 482 | } else |
cb00ea35 | 483 | block++; |
1da177e4 | 484 | |
3bf25cb4 | 485 | brelse(fibh->sbh); |
1da177e4 LT |
486 | fibh->sbh = fibh->ebh; |
487 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 488 | } else { |
1da177e4 | 489 | fi = (struct fileIdentDesc *) |
4b11111a MS |
490 | (fibh->sbh->b_data + sb->s_blocksize + |
491 | fibh->soffset); | |
1da177e4 LT |
492 | } |
493 | } | |
494 | ||
495 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 496 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a MS |
497 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
498 | sizeof(tag)); | |
1da177e4 | 499 | else |
4b11111a MS |
500 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
501 | sizeof(tag)); | |
1da177e4 LT |
502 | cfi->fileVersionNum = cpu_to_le16(1); |
503 | cfi->lengthFileIdent = namelen; | |
504 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 505 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
3bf25cb4 | 506 | brelse(epos.bh); |
1da177e4 | 507 | dir->i_size += nfidlen; |
48d6d8ff MS |
508 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
509 | dinfo->i_lenAlloc += nfidlen; | |
1da177e4 LT |
510 | mark_inode_dirty(dir); |
511 | return fi; | |
cb00ea35 | 512 | } else { |
3bf25cb4 | 513 | brelse(epos.bh); |
1da177e4 | 514 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
515 | brelse(fibh->ebh); |
516 | brelse(fibh->sbh); | |
1da177e4 LT |
517 | *err = -EIO; |
518 | return NULL; | |
519 | } | |
520 | } | |
521 | ||
522 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
523 | struct udf_fileident_bh *fibh, |
524 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
525 | { |
526 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 527 | |
1da177e4 LT |
528 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
529 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 530 | |
1da177e4 LT |
531 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
532 | } | |
533 | ||
cb00ea35 CG |
534 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
535 | struct nameidata *nd) | |
1da177e4 LT |
536 | { |
537 | struct udf_fileident_bh fibh; | |
538 | struct inode *inode; | |
539 | struct fileIdentDesc cfi, *fi; | |
540 | int err; | |
48d6d8ff | 541 | struct udf_inode_info *iinfo; |
1da177e4 LT |
542 | |
543 | lock_kernel(); | |
544 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 545 | if (!inode) { |
1da177e4 LT |
546 | unlock_kernel(); |
547 | return err; | |
548 | } | |
549 | ||
48d6d8ff MS |
550 | iinfo = UDF_I(inode); |
551 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
552 | inode->i_data.a_ops = &udf_adinicb_aops; |
553 | else | |
554 | inode->i_data.a_ops = &udf_aops; | |
555 | inode->i_op = &udf_file_inode_operations; | |
556 | inode->i_fop = &udf_file_operations; | |
557 | inode->i_mode = mode; | |
558 | mark_inode_dirty(inode); | |
559 | ||
4b11111a MS |
560 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
561 | if (!fi) { | |
cb00ea35 | 562 | inode->i_nlink--; |
1da177e4 LT |
563 | mark_inode_dirty(inode); |
564 | iput(inode); | |
565 | unlock_kernel(); | |
566 | return err; | |
567 | } | |
568 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 569 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 570 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 571 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 572 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 573 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 574 | mark_inode_dirty(dir); |
1da177e4 | 575 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
576 | brelse(fibh.ebh); |
577 | brelse(fibh.sbh); | |
1da177e4 LT |
578 | unlock_kernel(); |
579 | d_instantiate(dentry, inode); | |
28de7948 | 580 | |
1da177e4 LT |
581 | return 0; |
582 | } | |
583 | ||
cb00ea35 CG |
584 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
585 | dev_t rdev) | |
1da177e4 | 586 | { |
cb00ea35 | 587 | struct inode *inode; |
1da177e4 LT |
588 | struct udf_fileident_bh fibh; |
589 | struct fileIdentDesc cfi, *fi; | |
590 | int err; | |
48d6d8ff | 591 | struct udf_inode_info *iinfo; |
1da177e4 LT |
592 | |
593 | if (!old_valid_dev(rdev)) | |
594 | return -EINVAL; | |
595 | ||
596 | lock_kernel(); | |
597 | err = -EIO; | |
598 | inode = udf_new_inode(dir, mode, &err); | |
599 | if (!inode) | |
600 | goto out; | |
601 | ||
48d6d8ff | 602 | iinfo = UDF_I(inode); |
1da177e4 LT |
603 | inode->i_uid = current->fsuid; |
604 | init_special_inode(inode, mode, rdev); | |
4b11111a MS |
605 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
606 | if (!fi) { | |
cb00ea35 | 607 | inode->i_nlink--; |
1da177e4 LT |
608 | mark_inode_dirty(inode); |
609 | iput(inode); | |
610 | unlock_kernel(); | |
611 | return err; | |
612 | } | |
613 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 614 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 615 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 616 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 617 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 618 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 619 | mark_inode_dirty(dir); |
1da177e4 LT |
620 | mark_inode_dirty(inode); |
621 | ||
622 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
623 | brelse(fibh.ebh); |
624 | brelse(fibh.sbh); | |
1da177e4 LT |
625 | d_instantiate(dentry, inode); |
626 | err = 0; | |
28de7948 CG |
627 | |
628 | out: | |
1da177e4 LT |
629 | unlock_kernel(); |
630 | return err; | |
631 | } | |
632 | ||
cb00ea35 | 633 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 634 | { |
cb00ea35 | 635 | struct inode *inode; |
1da177e4 LT |
636 | struct udf_fileident_bh fibh; |
637 | struct fileIdentDesc cfi, *fi; | |
638 | int err; | |
48d6d8ff MS |
639 | struct udf_inode_info *dinfo = UDF_I(dir); |
640 | struct udf_inode_info *iinfo; | |
1da177e4 LT |
641 | |
642 | lock_kernel(); | |
643 | err = -EMLINK; | |
cb00ea35 | 644 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
645 | goto out; |
646 | ||
647 | err = -EIO; | |
648 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
649 | if (!inode) | |
650 | goto out; | |
651 | ||
48d6d8ff | 652 | iinfo = UDF_I(inode); |
1da177e4 LT |
653 | inode->i_op = &udf_dir_inode_operations; |
654 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
655 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
656 | if (!fi) { | |
1da177e4 LT |
657 | inode->i_nlink--; |
658 | mark_inode_dirty(inode); | |
659 | iput(inode); | |
660 | goto out; | |
661 | } | |
662 | inode->i_nlink = 2; | |
663 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 664 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 665 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 666 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
667 | cfi.fileCharacteristics = |
668 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 669 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 670 | brelse(fibh.sbh); |
1da177e4 LT |
671 | inode->i_mode = S_IFDIR | mode; |
672 | if (dir->i_mode & S_ISGID) | |
673 | inode->i_mode |= S_ISGID; | |
674 | mark_inode_dirty(inode); | |
675 | ||
4b11111a MS |
676 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
677 | if (!fi) { | |
1da177e4 LT |
678 | inode->i_nlink = 0; |
679 | mark_inode_dirty(inode); | |
680 | iput(inode); | |
681 | goto out; | |
682 | } | |
683 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 684 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 685 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 686 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
687 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
688 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 689 | inc_nlink(dir); |
1da177e4 LT |
690 | mark_inode_dirty(dir); |
691 | d_instantiate(dentry, inode); | |
692 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
693 | brelse(fibh.ebh); |
694 | brelse(fibh.sbh); | |
1da177e4 | 695 | err = 0; |
28de7948 CG |
696 | |
697 | out: | |
1da177e4 LT |
698 | unlock_kernel(); |
699 | return err; | |
700 | } | |
701 | ||
702 | static int empty_dir(struct inode *dir) | |
703 | { | |
704 | struct fileIdentDesc *fi, cfi; | |
705 | struct udf_fileident_bh fibh; | |
706 | loff_t f_pos; | |
af793295 | 707 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 708 | int block; |
ff116fc8 JK |
709 | kernel_lb_addr eloc; |
710 | uint32_t elen; | |
60448b1d | 711 | sector_t offset; |
28de7948 | 712 | struct extent_position epos = {}; |
48d6d8ff | 713 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 714 | |
af793295 JK |
715 | f_pos = udf_ext0_offset(dir); |
716 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 717 | |
48d6d8ff | 718 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 719 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 720 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
721 | &epos, &eloc, &elen, &offset) == |
722 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 723 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 724 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 725 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 726 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 727 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 728 | epos.offset -= sizeof(long_ad); |
4b11111a | 729 | } else |
1da177e4 LT |
730 | offset = 0; |
731 | ||
4b11111a MS |
732 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
733 | if (!fibh.sbh) { | |
3bf25cb4 | 734 | brelse(epos.bh); |
1da177e4 LT |
735 | return 0; |
736 | } | |
cb00ea35 | 737 | } else { |
3bf25cb4 | 738 | brelse(epos.bh); |
1da177e4 LT |
739 | return 0; |
740 | } | |
741 | ||
af793295 | 742 | while (f_pos < size) { |
cb00ea35 CG |
743 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
744 | &elen, &offset); | |
cb00ea35 | 745 | if (!fi) { |
1da177e4 | 746 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
747 | brelse(fibh.ebh); |
748 | brelse(fibh.sbh); | |
749 | brelse(epos.bh); | |
1da177e4 LT |
750 | return 0; |
751 | } | |
752 | ||
28de7948 CG |
753 | if (cfi.lengthFileIdent && |
754 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 755 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
756 | brelse(fibh.ebh); |
757 | brelse(fibh.sbh); | |
758 | brelse(epos.bh); | |
1da177e4 LT |
759 | return 0; |
760 | } | |
761 | } | |
28de7948 | 762 | |
1da177e4 | 763 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
764 | brelse(fibh.ebh); |
765 | brelse(fibh.sbh); | |
766 | brelse(epos.bh); | |
28de7948 | 767 | |
1da177e4 LT |
768 | return 1; |
769 | } | |
770 | ||
cb00ea35 | 771 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
772 | { |
773 | int retval; | |
cb00ea35 | 774 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
775 | struct udf_fileident_bh fibh; |
776 | struct fileIdentDesc *fi, cfi; | |
777 | kernel_lb_addr tloc; | |
778 | ||
779 | retval = -ENOENT; | |
780 | lock_kernel(); | |
781 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
782 | if (!fi) | |
783 | goto out; | |
784 | ||
785 | retval = -EIO; | |
786 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
787 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
788 | goto end_rmdir; | |
789 | retval = -ENOTEMPTY; | |
790 | if (!empty_dir(inode)) | |
791 | goto end_rmdir; | |
792 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
793 | if (retval) | |
794 | goto end_rmdir; | |
795 | if (inode->i_nlink != 2) | |
796 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
797 | "empty directory has nlink != 2 (%d)", |
798 | inode->i_nlink); | |
ce71ec36 | 799 | clear_nlink(inode); |
1da177e4 | 800 | inode->i_size = 0; |
c007c06e | 801 | inode_dec_link_count(dir); |
4b11111a MS |
802 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
803 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
804 | mark_inode_dirty(dir); |
805 | ||
28de7948 | 806 | end_rmdir: |
1da177e4 | 807 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
808 | brelse(fibh.ebh); |
809 | brelse(fibh.sbh); | |
28de7948 CG |
810 | |
811 | out: | |
1da177e4 LT |
812 | unlock_kernel(); |
813 | return retval; | |
814 | } | |
815 | ||
cb00ea35 | 816 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
817 | { |
818 | int retval; | |
cb00ea35 | 819 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
820 | struct udf_fileident_bh fibh; |
821 | struct fileIdentDesc *fi; | |
822 | struct fileIdentDesc cfi; | |
823 | kernel_lb_addr tloc; | |
824 | ||
825 | retval = -ENOENT; | |
826 | lock_kernel(); | |
827 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
828 | if (!fi) | |
829 | goto out; | |
830 | ||
831 | retval = -EIO; | |
832 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
833 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
834 | goto end_unlink; | |
835 | ||
cb00ea35 | 836 | if (!inode->i_nlink) { |
1da177e4 | 837 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 838 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
839 | inode->i_nlink = 1; |
840 | } | |
841 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
842 | if (retval) | |
843 | goto end_unlink; | |
844 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
845 | mark_inode_dirty(dir); | |
9a53c3a7 | 846 | inode_dec_link_count(inode); |
1da177e4 LT |
847 | inode->i_ctime = dir->i_ctime; |
848 | retval = 0; | |
849 | ||
28de7948 | 850 | end_unlink: |
1da177e4 | 851 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
852 | brelse(fibh.ebh); |
853 | brelse(fibh.sbh); | |
28de7948 CG |
854 | |
855 | out: | |
1da177e4 LT |
856 | unlock_kernel(); |
857 | return retval; | |
858 | } | |
859 | ||
cb00ea35 CG |
860 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
861 | const char *symname) | |
1da177e4 | 862 | { |
cb00ea35 | 863 | struct inode *inode; |
1da177e4 LT |
864 | struct pathComponent *pc; |
865 | char *compstart; | |
866 | struct udf_fileident_bh fibh; | |
28de7948 | 867 | struct extent_position epos = {}; |
1da177e4 LT |
868 | int eoffset, elen = 0; |
869 | struct fileIdentDesc *fi; | |
870 | struct fileIdentDesc cfi; | |
871 | char *ea; | |
872 | int err; | |
873 | int block; | |
874 | char name[UDF_NAME_LEN]; | |
875 | int namelen; | |
6c79e987 | 876 | struct buffer_head *bh; |
48d6d8ff | 877 | struct udf_inode_info *iinfo; |
1da177e4 LT |
878 | |
879 | lock_kernel(); | |
4b11111a MS |
880 | inode = udf_new_inode(dir, S_IFLNK, &err); |
881 | if (!inode) | |
1da177e4 LT |
882 | goto out; |
883 | ||
48d6d8ff | 884 | iinfo = UDF_I(inode); |
1da177e4 LT |
885 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
886 | inode->i_data.a_ops = &udf_symlink_aops; | |
887 | inode->i_op = &page_symlink_inode_operations; | |
888 | ||
48d6d8ff | 889 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 JK |
890 | kernel_lb_addr eloc; |
891 | uint32_t elen; | |
1da177e4 LT |
892 | |
893 | block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
894 | iinfo->i_location.partitionReferenceNum, |
895 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
896 | if (!block) |
897 | goto out_no_entry; | |
48d6d8ff | 898 | epos.block = iinfo->i_location; |
ff116fc8 JK |
899 | epos.offset = udf_file_entry_alloc_offset(inode); |
900 | epos.bh = NULL; | |
1da177e4 | 901 | eloc.logicalBlockNum = block; |
4b11111a | 902 | eloc.partitionReferenceNum = |
48d6d8ff | 903 | iinfo->i_location.partitionReferenceNum; |
1da177e4 | 904 | elen = inode->i_sb->s_blocksize; |
48d6d8ff | 905 | iinfo->i_lenExtents = elen; |
ff116fc8 | 906 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 907 | brelse(epos.bh); |
1da177e4 LT |
908 | |
909 | block = udf_get_pblock(inode->i_sb, block, | |
48d6d8ff | 910 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 911 | 0); |
ff116fc8 JK |
912 | epos.bh = udf_tread(inode->i_sb, block); |
913 | lock_buffer(epos.bh); | |
914 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
915 | set_buffer_uptodate(epos.bh); | |
916 | unlock_buffer(epos.bh); | |
917 | mark_buffer_dirty_inode(epos.bh, inode); | |
918 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
919 | } else |
920 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 LT |
921 | |
922 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
923 | pc = (struct pathComponent *)ea; | |
924 | ||
cb00ea35 CG |
925 | if (*symname == '/') { |
926 | do { | |
1da177e4 LT |
927 | symname++; |
928 | } while (*symname == '/'); | |
929 | ||
930 | pc->componentType = 1; | |
931 | pc->lengthComponentIdent = 0; | |
932 | pc->componentFileVersionNum = 0; | |
933 | pc += sizeof(struct pathComponent); | |
934 | elen += sizeof(struct pathComponent); | |
935 | } | |
936 | ||
937 | err = -ENAMETOOLONG; | |
938 | ||
cb00ea35 | 939 | while (*symname) { |
1da177e4 LT |
940 | if (elen + sizeof(struct pathComponent) > eoffset) |
941 | goto out_no_entry; | |
942 | ||
943 | pc = (struct pathComponent *)(ea + elen); | |
944 | ||
945 | compstart = (char *)symname; | |
946 | ||
cb00ea35 | 947 | do { |
1da177e4 LT |
948 | symname++; |
949 | } while (*symname && *symname != '/'); | |
950 | ||
951 | pc->componentType = 5; | |
952 | pc->lengthComponentIdent = 0; | |
953 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
954 | if (compstart[0] == '.') { |
955 | if ((symname - compstart) == 1) | |
1da177e4 | 956 | pc->componentType = 4; |
4b11111a MS |
957 | else if ((symname - compstart) == 2 && |
958 | compstart[1] == '.') | |
1da177e4 LT |
959 | pc->componentType = 3; |
960 | } | |
961 | ||
cb00ea35 | 962 | if (pc->componentType == 5) { |
28de7948 CG |
963 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
964 | symname - compstart); | |
965 | if (!namelen) | |
1da177e4 LT |
966 | goto out_no_entry; |
967 | ||
4b11111a MS |
968 | if (elen + sizeof(struct pathComponent) + namelen > |
969 | eoffset) | |
1da177e4 LT |
970 | goto out_no_entry; |
971 | else | |
972 | pc->lengthComponentIdent = namelen; | |
973 | ||
974 | memcpy(pc->componentIdent, name, namelen); | |
975 | } | |
976 | ||
977 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
978 | ||
cb00ea35 CG |
979 | if (*symname) { |
980 | do { | |
1da177e4 LT |
981 | symname++; |
982 | } while (*symname == '/'); | |
983 | } | |
984 | } | |
985 | ||
3bf25cb4 | 986 | brelse(epos.bh); |
1da177e4 | 987 | inode->i_size = elen; |
48d6d8ff MS |
988 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
989 | iinfo->i_lenAlloc = inode->i_size; | |
1da177e4 LT |
990 | mark_inode_dirty(inode); |
991 | ||
4b11111a MS |
992 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
993 | if (!fi) | |
1da177e4 LT |
994 | goto out_no_entry; |
995 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 996 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
6c79e987 MS |
997 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
998 | if (bh) { | |
4b11111a MS |
999 | struct logicalVolIntegrityDesc *lvid = |
1000 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1001 | struct logicalVolHeaderDesc *lvhd; |
1002 | uint64_t uniqueID; | |
4b11111a MS |
1003 | lvhd = (struct logicalVolHeaderDesc *) |
1004 | lvid->logicalVolContentsUse; | |
1da177e4 | 1005 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1006 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1007 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1008 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1009 | uniqueID += 16; | |
1010 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1011 | mark_buffer_dirty(bh); |
1da177e4 LT |
1012 | } |
1013 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1014 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1015 | mark_inode_dirty(dir); |
1da177e4 | 1016 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1017 | brelse(fibh.ebh); |
1018 | brelse(fibh.sbh); | |
1da177e4 LT |
1019 | d_instantiate(dentry, inode); |
1020 | err = 0; | |
1021 | ||
28de7948 | 1022 | out: |
1da177e4 LT |
1023 | unlock_kernel(); |
1024 | return err; | |
1025 | ||
28de7948 | 1026 | out_no_entry: |
9a53c3a7 | 1027 | inode_dec_link_count(inode); |
1da177e4 LT |
1028 | iput(inode); |
1029 | goto out; | |
1030 | } | |
1031 | ||
cb00ea35 CG |
1032 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1033 | struct dentry *dentry) | |
1da177e4 LT |
1034 | { |
1035 | struct inode *inode = old_dentry->d_inode; | |
1036 | struct udf_fileident_bh fibh; | |
1037 | struct fileIdentDesc cfi, *fi; | |
1038 | int err; | |
6c79e987 | 1039 | struct buffer_head *bh; |
1da177e4 LT |
1040 | |
1041 | lock_kernel(); | |
cb00ea35 | 1042 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1043 | unlock_kernel(); |
1044 | return -EMLINK; | |
1045 | } | |
1046 | ||
4b11111a MS |
1047 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1048 | if (!fi) { | |
1da177e4 LT |
1049 | unlock_kernel(); |
1050 | return err; | |
1051 | } | |
1052 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1053 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1054 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1055 | if (bh) { | |
4b11111a MS |
1056 | struct logicalVolIntegrityDesc *lvid = |
1057 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1058 | struct logicalVolHeaderDesc *lvhd; |
1059 | uint64_t uniqueID; | |
4b11111a MS |
1060 | lvhd = (struct logicalVolHeaderDesc *) |
1061 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1062 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1063 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1064 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1065 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1066 | uniqueID += 16; | |
1067 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1068 | mark_buffer_dirty(bh); |
1da177e4 LT |
1069 | } |
1070 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1071 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1072 | mark_inode_dirty(dir); |
28de7948 | 1073 | |
1da177e4 | 1074 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1075 | brelse(fibh.ebh); |
1076 | brelse(fibh.sbh); | |
d8c76e6f | 1077 | inc_nlink(inode); |
1da177e4 LT |
1078 | inode->i_ctime = current_fs_time(inode->i_sb); |
1079 | mark_inode_dirty(inode); | |
1080 | atomic_inc(&inode->i_count); | |
1081 | d_instantiate(dentry, inode); | |
1082 | unlock_kernel(); | |
28de7948 | 1083 | |
1da177e4 LT |
1084 | return 0; |
1085 | } | |
1086 | ||
1087 | /* Anybody can rename anything with this: the permission checks are left to the | |
1088 | * higher-level routines. | |
1089 | */ | |
cb00ea35 CG |
1090 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1091 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1092 | { |
cb00ea35 CG |
1093 | struct inode *old_inode = old_dentry->d_inode; |
1094 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1095 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1096 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1097 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1098 | struct buffer_head *dir_bh = NULL; |
1099 | int retval = -ENOENT; | |
1100 | kernel_lb_addr tloc; | |
48d6d8ff | 1101 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 LT |
1102 | |
1103 | lock_kernel(); | |
4b11111a MS |
1104 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); |
1105 | if (ofi) { | |
1da177e4 | 1106 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1107 | brelse(ofibh.ebh); |
1108 | brelse(ofibh.sbh); | |
1da177e4 LT |
1109 | } |
1110 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1111 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1112 | != old_inode->i_ino) |
1da177e4 LT |
1113 | goto end_rename; |
1114 | ||
1115 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1116 | if (nfi) { |
1117 | if (!new_inode) { | |
1da177e4 | 1118 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1119 | brelse(nfibh.ebh); |
1120 | brelse(nfibh.sbh); | |
1da177e4 LT |
1121 | nfi = NULL; |
1122 | } | |
1123 | } | |
cb00ea35 | 1124 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1125 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1126 | |
cb00ea35 | 1127 | if (new_inode) { |
1da177e4 LT |
1128 | retval = -ENOTEMPTY; |
1129 | if (!empty_dir(new_inode)) | |
1130 | goto end_rename; | |
1131 | } | |
1132 | retval = -EIO; | |
48d6d8ff | 1133 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1134 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1135 | old_iinfo->i_ext.i_data - |
1136 | (old_iinfo->i_efe ? | |
4b11111a MS |
1137 | sizeof(struct extendedFileEntry) : |
1138 | sizeof(struct fileEntry)), | |
1139 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1140 | } else { |
1da177e4 LT |
1141 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1142 | if (!dir_bh) | |
1143 | goto end_rename; | |
4b11111a MS |
1144 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1145 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1146 | } |
1147 | if (!dir_fi) | |
1148 | goto end_rename; | |
1149 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
4b11111a MS |
1150 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != |
1151 | old_dir->i_ino) | |
1da177e4 LT |
1152 | goto end_rename; |
1153 | ||
1154 | retval = -EMLINK; | |
4b11111a MS |
1155 | if (!new_inode && |
1156 | new_dir->i_nlink >= | |
1157 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1158 | goto end_rename; |
1159 | } | |
cb00ea35 | 1160 | if (!nfi) { |
4b11111a MS |
1161 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1162 | &retval); | |
1da177e4 LT |
1163 | if (!nfi) |
1164 | goto end_rename; | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * Like most other Unix systems, set the ctime for inodes on a | |
1169 | * rename. | |
1170 | */ | |
1171 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1172 | mark_inode_dirty(old_inode); | |
1173 | ||
1174 | /* | |
1175 | * ok, that's it | |
1176 | */ | |
1177 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1178 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1179 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1180 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1181 | ||
1182 | /* The old fid may have moved - find it again */ | |
1183 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1184 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1185 | ||
cb00ea35 | 1186 | if (new_inode) { |
1da177e4 | 1187 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1188 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1189 | } |
1190 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1191 | mark_inode_dirty(old_dir); | |
1192 | ||
cb00ea35 | 1193 | if (dir_fi) { |
c0b34438 | 1194 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1195 | udf_update_tag((char *)dir_fi, |
1196 | (sizeof(struct fileIdentDesc) + | |
1197 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1198 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1199 | mark_inode_dirty(old_inode); |
4b11111a | 1200 | else |
1da177e4 | 1201 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1202 | |
9a53c3a7 | 1203 | inode_dec_link_count(old_dir); |
4b11111a | 1204 | if (new_inode) |
9a53c3a7 | 1205 | inode_dec_link_count(new_inode); |
4b11111a | 1206 | else { |
d8c76e6f | 1207 | inc_nlink(new_dir); |
1da177e4 LT |
1208 | mark_inode_dirty(new_dir); |
1209 | } | |
1210 | } | |
1211 | ||
cb00ea35 | 1212 | if (ofi) { |
1da177e4 | 1213 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1214 | brelse(ofibh.ebh); |
1215 | brelse(ofibh.sbh); | |
1da177e4 LT |
1216 | } |
1217 | ||
1218 | retval = 0; | |
1219 | ||
28de7948 | 1220 | end_rename: |
3bf25cb4 | 1221 | brelse(dir_bh); |
cb00ea35 | 1222 | if (nfi) { |
1da177e4 | 1223 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1224 | brelse(nfibh.ebh); |
1225 | brelse(nfibh.sbh); | |
1da177e4 LT |
1226 | } |
1227 | unlock_kernel(); | |
28de7948 | 1228 | |
1da177e4 LT |
1229 | return retval; |
1230 | } | |
1231 | ||
c5ef1c42 | 1232 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1233 | .lookup = udf_lookup, |
1234 | .create = udf_create, | |
1235 | .link = udf_link, | |
1236 | .unlink = udf_unlink, | |
1237 | .symlink = udf_symlink, | |
1238 | .mkdir = udf_mkdir, | |
1239 | .rmdir = udf_rmdir, | |
1240 | .mknod = udf_mknod, | |
1241 | .rename = udf_rename, | |
1da177e4 | 1242 | }; |