]>
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; | |
b80697c1 | 152 | char *fname = NULL; |
1da177e4 LT |
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 | |
b80697c1 | 166 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 167 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
b80697c1 JK |
168 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
169 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
170 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) | |
171 | goto out_err; | |
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 | 181 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
b80697c1 JK |
182 | if (!fibh->sbh) |
183 | goto out_err; | |
1da177e4 LT |
184 | } |
185 | ||
b80697c1 JK |
186 | fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
187 | if (!fname) | |
188 | goto out_err; | |
189 | ||
af793295 | 190 | while (f_pos < size) { |
cb00ea35 CG |
191 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
192 | &elen, &offset); | |
b80697c1 JK |
193 | if (!fi) |
194 | goto out_err; | |
1da177e4 LT |
195 | |
196 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
197 | lfi = cfi->lengthFileIdent; | |
198 | ||
cb00ea35 | 199 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 200 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 201 | } else { |
1da177e4 LT |
202 | int poffset; /* Unpaded ending offset */ |
203 | ||
4b11111a MS |
204 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
205 | liu + lfi; | |
1da177e4 | 206 | |
4b11111a MS |
207 | if (poffset >= lfi) |
208 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
209 | poffset - lfi); | |
210 | else { | |
1da177e4 | 211 | nameptr = fname; |
4b11111a MS |
212 | memcpy(nameptr, fi->fileIdent + liu, |
213 | lfi - poffset); | |
214 | memcpy(nameptr + lfi - poffset, | |
215 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
216 | } |
217 | } | |
218 | ||
cb00ea35 CG |
219 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
220 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
221 | continue; |
222 | } | |
cb00ea35 CG |
223 | |
224 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
225 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
226 | continue; |
227 | } | |
228 | ||
229 | if (!lfi) | |
230 | continue; | |
231 | ||
4b11111a MS |
232 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
233 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
b80697c1 JK |
234 | dentry->d_name.name)) |
235 | goto out_ok; | |
1da177e4 | 236 | } |
28de7948 | 237 | |
b80697c1 JK |
238 | out_err: |
239 | fi = NULL; | |
1da177e4 | 240 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
241 | brelse(fibh->ebh); |
242 | brelse(fibh->sbh); | |
b80697c1 | 243 | out_ok: |
3bf25cb4 | 244 | brelse(epos.bh); |
b80697c1 | 245 | kfree(fname); |
28de7948 | 246 | |
b80697c1 | 247 | return fi; |
1da177e4 LT |
248 | } |
249 | ||
cb00ea35 CG |
250 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
251 | struct nameidata *nd) | |
1da177e4 LT |
252 | { |
253 | struct inode *inode = NULL; | |
db9a369e | 254 | struct fileIdentDesc cfi; |
1da177e4 LT |
255 | struct udf_fileident_bh fibh; |
256 | ||
cb00ea35 | 257 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
258 | return ERR_PTR(-ENAMETOOLONG); |
259 | ||
260 | lock_kernel(); | |
261 | #ifdef UDF_RECOVERY | |
262 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 263 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
28de7948 CG |
264 | kernel_lb_addr lb = { |
265 | .logicalBlockNum = 0, | |
4b11111a MS |
266 | .partitionReferenceNum = |
267 | simple_strtoul(dentry->d_name.name + 3, | |
268 | NULL, 0), | |
28de7948 | 269 | }; |
1da177e4 | 270 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 271 | if (!inode) { |
1da177e4 LT |
272 | unlock_kernel(); |
273 | return ERR_PTR(-EACCES); | |
274 | } | |
4b11111a | 275 | } else |
28de7948 | 276 | #endif /* UDF_RECOVERY */ |
1da177e4 | 277 | |
cb00ea35 | 278 | if (udf_find_entry(dir, dentry, &fibh, &cfi)) { |
1da177e4 | 279 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
280 | brelse(fibh.ebh); |
281 | brelse(fibh.sbh); | |
1da177e4 LT |
282 | |
283 | inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); | |
cb00ea35 | 284 | if (!inode) { |
1da177e4 LT |
285 | unlock_kernel(); |
286 | return ERR_PTR(-EACCES); | |
287 | } | |
288 | } | |
289 | unlock_kernel(); | |
290 | d_add(dentry, inode); | |
28de7948 | 291 | |
1da177e4 LT |
292 | return NULL; |
293 | } | |
294 | ||
cb00ea35 CG |
295 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
296 | struct dentry *dentry, | |
297 | struct udf_fileident_bh *fibh, | |
298 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 299 | { |
6c79e987 | 300 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 301 | struct fileIdentDesc *fi = NULL; |
b80697c1 | 302 | char *name = NULL; |
1da177e4 LT |
303 | int namelen; |
304 | loff_t f_pos; | |
af793295 | 305 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
306 | int nfidlen; |
307 | uint8_t lfi; | |
308 | uint16_t liu; | |
309 | int block; | |
ff116fc8 JK |
310 | kernel_lb_addr eloc; |
311 | uint32_t elen; | |
60448b1d | 312 | sector_t offset; |
28de7948 | 313 | struct extent_position epos = {}; |
48d6d8ff | 314 | struct udf_inode_info *dinfo; |
1da177e4 | 315 | |
b80697c1 JK |
316 | fibh->sbh = fibh->ebh = NULL; |
317 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); | |
318 | if (!name) { | |
319 | *err = -ENOMEM; | |
320 | goto out_err; | |
321 | } | |
322 | ||
cb00ea35 CG |
323 | if (dentry) { |
324 | if (!dentry->d_name.len) { | |
1da177e4 | 325 | *err = -EINVAL; |
b80697c1 | 326 | goto out_err; |
1da177e4 | 327 | } |
4b11111a MS |
328 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
329 | dentry->d_name.len); | |
330 | if (!namelen) { | |
1da177e4 | 331 | *err = -ENAMETOOLONG; |
b80697c1 | 332 | goto out_err; |
1da177e4 | 333 | } |
28de7948 | 334 | } else { |
1da177e4 | 335 | namelen = 0; |
28de7948 | 336 | } |
1da177e4 LT |
337 | |
338 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
339 | ||
af793295 | 340 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 341 | |
af793295 | 342 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 343 | dinfo = UDF_I(dir); |
b80697c1 JK |
344 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
345 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
346 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { | |
347 | block = udf_get_lb_pblock(dir->i_sb, | |
348 | dinfo->i_location, 0); | |
349 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
350 | goto add; | |
351 | } | |
1da177e4 | 352 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 353 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 354 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 355 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 356 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 357 | epos.offset -= sizeof(long_ad); |
4b11111a | 358 | } else |
1da177e4 LT |
359 | offset = 0; |
360 | ||
4b11111a MS |
361 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
362 | if (!fibh->sbh) { | |
1da177e4 | 363 | *err = -EIO; |
b80697c1 | 364 | goto out_err; |
1da177e4 LT |
365 | } |
366 | ||
48d6d8ff | 367 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 LT |
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 | *err = -EIO; |
b80697c1 | 376 | goto out_err; |
1da177e4 LT |
377 | } |
378 | ||
379 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
380 | lfi = cfi->lengthFileIdent; | |
381 | ||
cb00ea35 | 382 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
383 | if (((sizeof(struct fileIdentDesc) + |
384 | liu + lfi + 3) & ~3) == nfidlen) { | |
1da177e4 LT |
385 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
386 | cfi->fileVersionNum = cpu_to_le16(1); | |
387 | cfi->fileCharacteristics = 0; | |
388 | cfi->lengthFileIdent = namelen; | |
389 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
390 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
391 | name)) | |
b80697c1 | 392 | goto out_ok; |
4b11111a | 393 | else { |
1da177e4 | 394 | *err = -EIO; |
b80697c1 | 395 | goto out_err; |
1da177e4 LT |
396 | } |
397 | } | |
398 | } | |
1da177e4 LT |
399 | } |
400 | ||
28de7948 | 401 | add: |
05343c4f JK |
402 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
403 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); | |
404 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
405 | epos.offset -= sizeof(short_ad); | |
406 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
407 | epos.offset -= sizeof(long_ad); | |
408 | udf_write_aext(dir, &epos, eloc, elen, 1); | |
409 | } | |
1da177e4 LT |
410 | f_pos += nfidlen; |
411 | ||
48d6d8ff | 412 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 413 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 414 | brelse(epos.bh); |
ff116fc8 | 415 | epos.bh = NULL; |
1da177e4 LT |
416 | fibh->soffset -= udf_ext0_offset(dir); |
417 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 418 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 419 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
420 | brelse(fibh->ebh); |
421 | brelse(fibh->sbh); | |
4b11111a MS |
422 | fibh->sbh = fibh->ebh = |
423 | udf_expand_dir_adinicb(dir, &block, err); | |
424 | if (!fibh->sbh) | |
b80697c1 | 425 | goto out_err; |
48d6d8ff | 426 | epos.block = dinfo->i_location; |
ff116fc8 | 427 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
428 | /* Load extent udf_expand_dir_adinicb() has created */ |
429 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
430 | } |
431 | ||
cb00ea35 | 432 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
433 | fibh->soffset = fibh->eoffset; |
434 | fibh->eoffset += nfidlen; | |
cb00ea35 | 435 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 436 | brelse(fibh->sbh); |
1da177e4 LT |
437 | fibh->sbh = fibh->ebh; |
438 | } | |
439 | ||
48d6d8ff MS |
440 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
441 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 442 | fi = (struct fileIdentDesc *) |
48d6d8ff | 443 | (dinfo->i_ext.i_data + |
c0b34438 | 444 | fibh->soffset - |
4b11111a | 445 | udf_ext0_offset(dir) + |
48d6d8ff | 446 | dinfo->i_lenEAttr); |
cb00ea35 | 447 | } else { |
4b11111a MS |
448 | block = eloc.logicalBlockNum + |
449 | ((elen - 1) >> | |
450 | dir->i_sb->s_blocksize_bits); | |
451 | fi = (struct fileIdentDesc *) | |
452 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 453 | } |
cb00ea35 | 454 | } else { |
1da177e4 LT |
455 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
456 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 457 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 458 | brelse(fibh->sbh); |
1da177e4 LT |
459 | fibh->sbh = fibh->ebh; |
460 | } | |
461 | ||
462 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 463 | dir->i_sb->s_blocksize_bits); |
4b11111a | 464 | fibh->ebh = udf_bread(dir, |
af793295 | 465 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
466 | if (!fibh->ebh) |
467 | goto out_err; | |
1da177e4 | 468 | |
28de7948 | 469 | if (!fibh->soffset) { |
ff116fc8 | 470 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 471 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 472 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 | 473 | dir->i_sb->s_blocksize_bits); |
4b11111a | 474 | } else |
cb00ea35 | 475 | block++; |
1da177e4 | 476 | |
3bf25cb4 | 477 | brelse(fibh->sbh); |
1da177e4 LT |
478 | fibh->sbh = fibh->ebh; |
479 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 480 | } else { |
1da177e4 | 481 | fi = (struct fileIdentDesc *) |
4b11111a MS |
482 | (fibh->sbh->b_data + sb->s_blocksize + |
483 | fibh->soffset); | |
1da177e4 LT |
484 | } |
485 | } | |
486 | ||
487 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 488 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a MS |
489 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
490 | sizeof(tag)); | |
1da177e4 | 491 | else |
4b11111a MS |
492 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
493 | sizeof(tag)); | |
1da177e4 LT |
494 | cfi->fileVersionNum = cpu_to_le16(1); |
495 | cfi->lengthFileIdent = namelen; | |
496 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 497 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 498 | dir->i_size += nfidlen; |
48d6d8ff MS |
499 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
500 | dinfo->i_lenAlloc += nfidlen; | |
1da177e4 | 501 | mark_inode_dirty(dir); |
b80697c1 | 502 | goto out_ok; |
cb00ea35 | 503 | } else { |
1da177e4 | 504 | *err = -EIO; |
b80697c1 | 505 | goto out_err; |
1da177e4 | 506 | } |
b80697c1 JK |
507 | |
508 | out_err: | |
509 | fi = NULL; | |
510 | if (fibh->sbh != fibh->ebh) | |
511 | brelse(fibh->ebh); | |
512 | brelse(fibh->sbh); | |
513 | out_ok: | |
514 | brelse(epos.bh); | |
515 | kfree(name); | |
516 | return fi; | |
1da177e4 LT |
517 | } |
518 | ||
519 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
520 | struct udf_fileident_bh *fibh, |
521 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
522 | { |
523 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 524 | |
1da177e4 LT |
525 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
526 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 527 | |
1da177e4 LT |
528 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
529 | } | |
530 | ||
cb00ea35 CG |
531 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
532 | struct nameidata *nd) | |
1da177e4 LT |
533 | { |
534 | struct udf_fileident_bh fibh; | |
535 | struct inode *inode; | |
536 | struct fileIdentDesc cfi, *fi; | |
537 | int err; | |
48d6d8ff | 538 | struct udf_inode_info *iinfo; |
1da177e4 LT |
539 | |
540 | lock_kernel(); | |
541 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 542 | if (!inode) { |
1da177e4 LT |
543 | unlock_kernel(); |
544 | return err; | |
545 | } | |
546 | ||
48d6d8ff MS |
547 | iinfo = UDF_I(inode); |
548 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
549 | inode->i_data.a_ops = &udf_adinicb_aops; |
550 | else | |
551 | inode->i_data.a_ops = &udf_aops; | |
552 | inode->i_op = &udf_file_inode_operations; | |
553 | inode->i_fop = &udf_file_operations; | |
554 | inode->i_mode = mode; | |
555 | mark_inode_dirty(inode); | |
556 | ||
4b11111a MS |
557 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
558 | if (!fi) { | |
cb00ea35 | 559 | inode->i_nlink--; |
1da177e4 LT |
560 | mark_inode_dirty(inode); |
561 | iput(inode); | |
562 | unlock_kernel(); | |
563 | return err; | |
564 | } | |
565 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 566 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 567 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 568 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 569 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 570 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 571 | mark_inode_dirty(dir); |
1da177e4 | 572 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
573 | brelse(fibh.ebh); |
574 | brelse(fibh.sbh); | |
1da177e4 LT |
575 | unlock_kernel(); |
576 | d_instantiate(dentry, inode); | |
28de7948 | 577 | |
1da177e4 LT |
578 | return 0; |
579 | } | |
580 | ||
cb00ea35 CG |
581 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
582 | dev_t rdev) | |
1da177e4 | 583 | { |
cb00ea35 | 584 | struct inode *inode; |
1da177e4 LT |
585 | struct udf_fileident_bh fibh; |
586 | struct fileIdentDesc cfi, *fi; | |
587 | int err; | |
48d6d8ff | 588 | struct udf_inode_info *iinfo; |
1da177e4 LT |
589 | |
590 | if (!old_valid_dev(rdev)) | |
591 | return -EINVAL; | |
592 | ||
593 | lock_kernel(); | |
594 | err = -EIO; | |
595 | inode = udf_new_inode(dir, mode, &err); | |
596 | if (!inode) | |
597 | goto out; | |
598 | ||
48d6d8ff | 599 | iinfo = UDF_I(inode); |
1da177e4 LT |
600 | inode->i_uid = current->fsuid; |
601 | init_special_inode(inode, mode, rdev); | |
4b11111a MS |
602 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
603 | if (!fi) { | |
cb00ea35 | 604 | inode->i_nlink--; |
1da177e4 LT |
605 | mark_inode_dirty(inode); |
606 | iput(inode); | |
607 | unlock_kernel(); | |
608 | return err; | |
609 | } | |
610 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 611 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 612 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 613 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 614 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 615 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 616 | mark_inode_dirty(dir); |
1da177e4 LT |
617 | mark_inode_dirty(inode); |
618 | ||
619 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
620 | brelse(fibh.ebh); |
621 | brelse(fibh.sbh); | |
1da177e4 LT |
622 | d_instantiate(dentry, inode); |
623 | err = 0; | |
28de7948 CG |
624 | |
625 | out: | |
1da177e4 LT |
626 | unlock_kernel(); |
627 | return err; | |
628 | } | |
629 | ||
cb00ea35 | 630 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 631 | { |
cb00ea35 | 632 | struct inode *inode; |
1da177e4 LT |
633 | struct udf_fileident_bh fibh; |
634 | struct fileIdentDesc cfi, *fi; | |
635 | int err; | |
48d6d8ff MS |
636 | struct udf_inode_info *dinfo = UDF_I(dir); |
637 | struct udf_inode_info *iinfo; | |
1da177e4 LT |
638 | |
639 | lock_kernel(); | |
640 | err = -EMLINK; | |
cb00ea35 | 641 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
642 | goto out; |
643 | ||
644 | err = -EIO; | |
645 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
646 | if (!inode) | |
647 | goto out; | |
648 | ||
48d6d8ff | 649 | iinfo = UDF_I(inode); |
1da177e4 LT |
650 | inode->i_op = &udf_dir_inode_operations; |
651 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
652 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
653 | if (!fi) { | |
1da177e4 LT |
654 | inode->i_nlink--; |
655 | mark_inode_dirty(inode); | |
656 | iput(inode); | |
657 | goto out; | |
658 | } | |
659 | inode->i_nlink = 2; | |
660 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 661 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 662 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 663 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
664 | cfi.fileCharacteristics = |
665 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 666 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 667 | brelse(fibh.sbh); |
1da177e4 LT |
668 | inode->i_mode = S_IFDIR | mode; |
669 | if (dir->i_mode & S_ISGID) | |
670 | inode->i_mode |= S_ISGID; | |
671 | mark_inode_dirty(inode); | |
672 | ||
4b11111a MS |
673 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
674 | if (!fi) { | |
1da177e4 LT |
675 | inode->i_nlink = 0; |
676 | mark_inode_dirty(inode); | |
677 | iput(inode); | |
678 | goto out; | |
679 | } | |
680 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 681 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 682 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 683 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
684 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
685 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 686 | inc_nlink(dir); |
1da177e4 LT |
687 | mark_inode_dirty(dir); |
688 | d_instantiate(dentry, inode); | |
689 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
690 | brelse(fibh.ebh); |
691 | brelse(fibh.sbh); | |
1da177e4 | 692 | err = 0; |
28de7948 CG |
693 | |
694 | out: | |
1da177e4 LT |
695 | unlock_kernel(); |
696 | return err; | |
697 | } | |
698 | ||
699 | static int empty_dir(struct inode *dir) | |
700 | { | |
701 | struct fileIdentDesc *fi, cfi; | |
702 | struct udf_fileident_bh fibh; | |
703 | loff_t f_pos; | |
af793295 | 704 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 705 | int block; |
ff116fc8 JK |
706 | kernel_lb_addr eloc; |
707 | uint32_t elen; | |
60448b1d | 708 | sector_t offset; |
28de7948 | 709 | struct extent_position epos = {}; |
48d6d8ff | 710 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 711 | |
af793295 JK |
712 | f_pos = udf_ext0_offset(dir); |
713 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 714 | |
48d6d8ff | 715 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 716 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 717 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
718 | &epos, &eloc, &elen, &offset) == |
719 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 720 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 721 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 722 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 723 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 724 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 725 | epos.offset -= sizeof(long_ad); |
4b11111a | 726 | } else |
1da177e4 LT |
727 | offset = 0; |
728 | ||
4b11111a MS |
729 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
730 | if (!fibh.sbh) { | |
3bf25cb4 | 731 | brelse(epos.bh); |
1da177e4 LT |
732 | return 0; |
733 | } | |
cb00ea35 | 734 | } else { |
3bf25cb4 | 735 | brelse(epos.bh); |
1da177e4 LT |
736 | return 0; |
737 | } | |
738 | ||
af793295 | 739 | while (f_pos < size) { |
cb00ea35 CG |
740 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
741 | &elen, &offset); | |
cb00ea35 | 742 | if (!fi) { |
1da177e4 | 743 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
744 | brelse(fibh.ebh); |
745 | brelse(fibh.sbh); | |
746 | brelse(epos.bh); | |
1da177e4 LT |
747 | return 0; |
748 | } | |
749 | ||
28de7948 CG |
750 | if (cfi.lengthFileIdent && |
751 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 752 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
753 | brelse(fibh.ebh); |
754 | brelse(fibh.sbh); | |
755 | brelse(epos.bh); | |
1da177e4 LT |
756 | return 0; |
757 | } | |
758 | } | |
28de7948 | 759 | |
1da177e4 | 760 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
761 | brelse(fibh.ebh); |
762 | brelse(fibh.sbh); | |
763 | brelse(epos.bh); | |
28de7948 | 764 | |
1da177e4 LT |
765 | return 1; |
766 | } | |
767 | ||
cb00ea35 | 768 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
769 | { |
770 | int retval; | |
cb00ea35 | 771 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
772 | struct udf_fileident_bh fibh; |
773 | struct fileIdentDesc *fi, cfi; | |
774 | kernel_lb_addr tloc; | |
775 | ||
776 | retval = -ENOENT; | |
777 | lock_kernel(); | |
778 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
779 | if (!fi) | |
780 | goto out; | |
781 | ||
782 | retval = -EIO; | |
783 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
784 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
785 | goto end_rmdir; | |
786 | retval = -ENOTEMPTY; | |
787 | if (!empty_dir(inode)) | |
788 | goto end_rmdir; | |
789 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
790 | if (retval) | |
791 | goto end_rmdir; | |
792 | if (inode->i_nlink != 2) | |
793 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
794 | "empty directory has nlink != 2 (%d)", |
795 | inode->i_nlink); | |
ce71ec36 | 796 | clear_nlink(inode); |
1da177e4 | 797 | inode->i_size = 0; |
c007c06e | 798 | inode_dec_link_count(dir); |
4b11111a MS |
799 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
800 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
801 | mark_inode_dirty(dir); |
802 | ||
28de7948 | 803 | end_rmdir: |
1da177e4 | 804 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
805 | brelse(fibh.ebh); |
806 | brelse(fibh.sbh); | |
28de7948 CG |
807 | |
808 | out: | |
1da177e4 LT |
809 | unlock_kernel(); |
810 | return retval; | |
811 | } | |
812 | ||
cb00ea35 | 813 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
814 | { |
815 | int retval; | |
cb00ea35 | 816 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
817 | struct udf_fileident_bh fibh; |
818 | struct fileIdentDesc *fi; | |
819 | struct fileIdentDesc cfi; | |
820 | kernel_lb_addr tloc; | |
821 | ||
822 | retval = -ENOENT; | |
823 | lock_kernel(); | |
824 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
825 | if (!fi) | |
826 | goto out; | |
827 | ||
828 | retval = -EIO; | |
829 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
830 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
831 | goto end_unlink; | |
832 | ||
cb00ea35 | 833 | if (!inode->i_nlink) { |
1da177e4 | 834 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 835 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
836 | inode->i_nlink = 1; |
837 | } | |
838 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
839 | if (retval) | |
840 | goto end_unlink; | |
841 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
842 | mark_inode_dirty(dir); | |
9a53c3a7 | 843 | inode_dec_link_count(inode); |
1da177e4 LT |
844 | inode->i_ctime = dir->i_ctime; |
845 | retval = 0; | |
846 | ||
28de7948 | 847 | end_unlink: |
1da177e4 | 848 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
849 | brelse(fibh.ebh); |
850 | brelse(fibh.sbh); | |
28de7948 CG |
851 | |
852 | out: | |
1da177e4 LT |
853 | unlock_kernel(); |
854 | return retval; | |
855 | } | |
856 | ||
cb00ea35 CG |
857 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
858 | const char *symname) | |
1da177e4 | 859 | { |
cb00ea35 | 860 | struct inode *inode; |
1da177e4 LT |
861 | struct pathComponent *pc; |
862 | char *compstart; | |
863 | struct udf_fileident_bh fibh; | |
28de7948 | 864 | struct extent_position epos = {}; |
1da177e4 LT |
865 | int eoffset, elen = 0; |
866 | struct fileIdentDesc *fi; | |
867 | struct fileIdentDesc cfi; | |
868 | char *ea; | |
869 | int err; | |
870 | int block; | |
b80697c1 | 871 | char *name = NULL; |
1da177e4 | 872 | int namelen; |
6c79e987 | 873 | struct buffer_head *bh; |
48d6d8ff | 874 | struct udf_inode_info *iinfo; |
1da177e4 LT |
875 | |
876 | lock_kernel(); | |
4b11111a MS |
877 | inode = udf_new_inode(dir, S_IFLNK, &err); |
878 | if (!inode) | |
1da177e4 LT |
879 | goto out; |
880 | ||
b80697c1 JK |
881 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
882 | if (!name) { | |
883 | err = -ENOMEM; | |
884 | goto out_no_entry; | |
885 | } | |
886 | ||
48d6d8ff | 887 | iinfo = UDF_I(inode); |
1da177e4 LT |
888 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
889 | inode->i_data.a_ops = &udf_symlink_aops; | |
890 | inode->i_op = &page_symlink_inode_operations; | |
891 | ||
48d6d8ff | 892 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 JK |
893 | kernel_lb_addr eloc; |
894 | uint32_t elen; | |
1da177e4 LT |
895 | |
896 | block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
897 | iinfo->i_location.partitionReferenceNum, |
898 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
899 | if (!block) |
900 | goto out_no_entry; | |
48d6d8ff | 901 | epos.block = iinfo->i_location; |
ff116fc8 JK |
902 | epos.offset = udf_file_entry_alloc_offset(inode); |
903 | epos.bh = NULL; | |
1da177e4 | 904 | eloc.logicalBlockNum = block; |
4b11111a | 905 | eloc.partitionReferenceNum = |
48d6d8ff | 906 | iinfo->i_location.partitionReferenceNum; |
1da177e4 | 907 | elen = inode->i_sb->s_blocksize; |
48d6d8ff | 908 | iinfo->i_lenExtents = elen; |
ff116fc8 | 909 | udf_add_aext(inode, &epos, eloc, elen, 0); |
3bf25cb4 | 910 | brelse(epos.bh); |
1da177e4 LT |
911 | |
912 | block = udf_get_pblock(inode->i_sb, block, | |
48d6d8ff | 913 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 914 | 0); |
ff116fc8 JK |
915 | epos.bh = udf_tread(inode->i_sb, block); |
916 | lock_buffer(epos.bh); | |
917 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
918 | set_buffer_uptodate(epos.bh); | |
919 | unlock_buffer(epos.bh); | |
920 | mark_buffer_dirty_inode(epos.bh, inode); | |
921 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
922 | } else |
923 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 LT |
924 | |
925 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
926 | pc = (struct pathComponent *)ea; | |
927 | ||
cb00ea35 CG |
928 | if (*symname == '/') { |
929 | do { | |
1da177e4 LT |
930 | symname++; |
931 | } while (*symname == '/'); | |
932 | ||
933 | pc->componentType = 1; | |
934 | pc->lengthComponentIdent = 0; | |
935 | pc->componentFileVersionNum = 0; | |
936 | pc += sizeof(struct pathComponent); | |
937 | elen += sizeof(struct pathComponent); | |
938 | } | |
939 | ||
940 | err = -ENAMETOOLONG; | |
941 | ||
cb00ea35 | 942 | while (*symname) { |
1da177e4 LT |
943 | if (elen + sizeof(struct pathComponent) > eoffset) |
944 | goto out_no_entry; | |
945 | ||
946 | pc = (struct pathComponent *)(ea + elen); | |
947 | ||
948 | compstart = (char *)symname; | |
949 | ||
cb00ea35 | 950 | do { |
1da177e4 LT |
951 | symname++; |
952 | } while (*symname && *symname != '/'); | |
953 | ||
954 | pc->componentType = 5; | |
955 | pc->lengthComponentIdent = 0; | |
956 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
957 | if (compstart[0] == '.') { |
958 | if ((symname - compstart) == 1) | |
1da177e4 | 959 | pc->componentType = 4; |
4b11111a MS |
960 | else if ((symname - compstart) == 2 && |
961 | compstart[1] == '.') | |
1da177e4 LT |
962 | pc->componentType = 3; |
963 | } | |
964 | ||
cb00ea35 | 965 | if (pc->componentType == 5) { |
28de7948 CG |
966 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
967 | symname - compstart); | |
968 | if (!namelen) | |
1da177e4 LT |
969 | goto out_no_entry; |
970 | ||
4b11111a MS |
971 | if (elen + sizeof(struct pathComponent) + namelen > |
972 | eoffset) | |
1da177e4 LT |
973 | goto out_no_entry; |
974 | else | |
975 | pc->lengthComponentIdent = namelen; | |
976 | ||
977 | memcpy(pc->componentIdent, name, namelen); | |
978 | } | |
979 | ||
980 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
981 | ||
cb00ea35 CG |
982 | if (*symname) { |
983 | do { | |
1da177e4 LT |
984 | symname++; |
985 | } while (*symname == '/'); | |
986 | } | |
987 | } | |
988 | ||
3bf25cb4 | 989 | brelse(epos.bh); |
1da177e4 | 990 | inode->i_size = elen; |
48d6d8ff MS |
991 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
992 | iinfo->i_lenAlloc = inode->i_size; | |
1da177e4 LT |
993 | mark_inode_dirty(inode); |
994 | ||
4b11111a MS |
995 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
996 | if (!fi) | |
1da177e4 LT |
997 | goto out_no_entry; |
998 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 999 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
6c79e987 MS |
1000 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1001 | if (bh) { | |
4b11111a MS |
1002 | struct logicalVolIntegrityDesc *lvid = |
1003 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1004 | struct logicalVolHeaderDesc *lvhd; |
1005 | uint64_t uniqueID; | |
4b11111a MS |
1006 | lvhd = (struct logicalVolHeaderDesc *) |
1007 | lvid->logicalVolContentsUse; | |
1da177e4 | 1008 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1009 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1010 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1011 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1012 | uniqueID += 16; | |
1013 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1014 | mark_buffer_dirty(bh); |
1da177e4 LT |
1015 | } |
1016 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1017 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1018 | mark_inode_dirty(dir); |
1da177e4 | 1019 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1020 | brelse(fibh.ebh); |
1021 | brelse(fibh.sbh); | |
1da177e4 LT |
1022 | d_instantiate(dentry, inode); |
1023 | err = 0; | |
1024 | ||
28de7948 | 1025 | out: |
b80697c1 | 1026 | kfree(name); |
1da177e4 LT |
1027 | unlock_kernel(); |
1028 | return err; | |
1029 | ||
28de7948 | 1030 | out_no_entry: |
9a53c3a7 | 1031 | inode_dec_link_count(inode); |
1da177e4 LT |
1032 | iput(inode); |
1033 | goto out; | |
1034 | } | |
1035 | ||
cb00ea35 CG |
1036 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1037 | struct dentry *dentry) | |
1da177e4 LT |
1038 | { |
1039 | struct inode *inode = old_dentry->d_inode; | |
1040 | struct udf_fileident_bh fibh; | |
1041 | struct fileIdentDesc cfi, *fi; | |
1042 | int err; | |
6c79e987 | 1043 | struct buffer_head *bh; |
1da177e4 LT |
1044 | |
1045 | lock_kernel(); | |
cb00ea35 | 1046 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1047 | unlock_kernel(); |
1048 | return -EMLINK; | |
1049 | } | |
1050 | ||
4b11111a MS |
1051 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1052 | if (!fi) { | |
1da177e4 LT |
1053 | unlock_kernel(); |
1054 | return err; | |
1055 | } | |
1056 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1057 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1058 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1059 | if (bh) { | |
4b11111a MS |
1060 | struct logicalVolIntegrityDesc *lvid = |
1061 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1062 | struct logicalVolHeaderDesc *lvhd; |
1063 | uint64_t uniqueID; | |
4b11111a MS |
1064 | lvhd = (struct logicalVolHeaderDesc *) |
1065 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1066 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1067 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1068 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1069 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1070 | uniqueID += 16; | |
1071 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1072 | mark_buffer_dirty(bh); |
1da177e4 LT |
1073 | } |
1074 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1075 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1076 | mark_inode_dirty(dir); |
28de7948 | 1077 | |
1da177e4 | 1078 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1079 | brelse(fibh.ebh); |
1080 | brelse(fibh.sbh); | |
d8c76e6f | 1081 | inc_nlink(inode); |
1da177e4 LT |
1082 | inode->i_ctime = current_fs_time(inode->i_sb); |
1083 | mark_inode_dirty(inode); | |
1084 | atomic_inc(&inode->i_count); | |
1085 | d_instantiate(dentry, inode); | |
1086 | unlock_kernel(); | |
28de7948 | 1087 | |
1da177e4 LT |
1088 | return 0; |
1089 | } | |
1090 | ||
1091 | /* Anybody can rename anything with this: the permission checks are left to the | |
1092 | * higher-level routines. | |
1093 | */ | |
cb00ea35 CG |
1094 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1095 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1096 | { |
cb00ea35 CG |
1097 | struct inode *old_inode = old_dentry->d_inode; |
1098 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1099 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1100 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1101 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1102 | struct buffer_head *dir_bh = NULL; |
1103 | int retval = -ENOENT; | |
1104 | kernel_lb_addr tloc; | |
48d6d8ff | 1105 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 LT |
1106 | |
1107 | lock_kernel(); | |
4b11111a MS |
1108 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); |
1109 | if (ofi) { | |
1da177e4 | 1110 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1111 | brelse(ofibh.ebh); |
1112 | brelse(ofibh.sbh); | |
1da177e4 LT |
1113 | } |
1114 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1115 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1116 | != old_inode->i_ino) |
1da177e4 LT |
1117 | goto end_rename; |
1118 | ||
1119 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1120 | if (nfi) { |
1121 | if (!new_inode) { | |
1da177e4 | 1122 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1123 | brelse(nfibh.ebh); |
1124 | brelse(nfibh.sbh); | |
1da177e4 LT |
1125 | nfi = NULL; |
1126 | } | |
1127 | } | |
cb00ea35 | 1128 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1129 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1130 | |
cb00ea35 | 1131 | if (new_inode) { |
1da177e4 LT |
1132 | retval = -ENOTEMPTY; |
1133 | if (!empty_dir(new_inode)) | |
1134 | goto end_rename; | |
1135 | } | |
1136 | retval = -EIO; | |
48d6d8ff | 1137 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1138 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1139 | old_iinfo->i_ext.i_data - |
1140 | (old_iinfo->i_efe ? | |
4b11111a MS |
1141 | sizeof(struct extendedFileEntry) : |
1142 | sizeof(struct fileEntry)), | |
1143 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1144 | } else { |
1da177e4 LT |
1145 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1146 | if (!dir_bh) | |
1147 | goto end_rename; | |
4b11111a MS |
1148 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1149 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1150 | } |
1151 | if (!dir_fi) | |
1152 | goto end_rename; | |
1153 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
4b11111a MS |
1154 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != |
1155 | old_dir->i_ino) | |
1da177e4 LT |
1156 | goto end_rename; |
1157 | ||
1158 | retval = -EMLINK; | |
4b11111a MS |
1159 | if (!new_inode && |
1160 | new_dir->i_nlink >= | |
1161 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1162 | goto end_rename; |
1163 | } | |
cb00ea35 | 1164 | if (!nfi) { |
4b11111a MS |
1165 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1166 | &retval); | |
1da177e4 LT |
1167 | if (!nfi) |
1168 | goto end_rename; | |
1169 | } | |
1170 | ||
1171 | /* | |
1172 | * Like most other Unix systems, set the ctime for inodes on a | |
1173 | * rename. | |
1174 | */ | |
1175 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1176 | mark_inode_dirty(old_inode); | |
1177 | ||
1178 | /* | |
1179 | * ok, that's it | |
1180 | */ | |
1181 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1182 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1183 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1184 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1185 | ||
1186 | /* The old fid may have moved - find it again */ | |
1187 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1188 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1189 | ||
cb00ea35 | 1190 | if (new_inode) { |
1da177e4 | 1191 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1192 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1193 | } |
1194 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1195 | mark_inode_dirty(old_dir); | |
1196 | ||
cb00ea35 | 1197 | if (dir_fi) { |
c0b34438 | 1198 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1199 | udf_update_tag((char *)dir_fi, |
1200 | (sizeof(struct fileIdentDesc) + | |
1201 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1202 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1203 | mark_inode_dirty(old_inode); |
4b11111a | 1204 | else |
1da177e4 | 1205 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1206 | |
9a53c3a7 | 1207 | inode_dec_link_count(old_dir); |
4b11111a | 1208 | if (new_inode) |
9a53c3a7 | 1209 | inode_dec_link_count(new_inode); |
4b11111a | 1210 | else { |
d8c76e6f | 1211 | inc_nlink(new_dir); |
1da177e4 LT |
1212 | mark_inode_dirty(new_dir); |
1213 | } | |
1214 | } | |
1215 | ||
cb00ea35 | 1216 | if (ofi) { |
1da177e4 | 1217 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1218 | brelse(ofibh.ebh); |
1219 | brelse(ofibh.sbh); | |
1da177e4 LT |
1220 | } |
1221 | ||
1222 | retval = 0; | |
1223 | ||
28de7948 | 1224 | end_rename: |
3bf25cb4 | 1225 | brelse(dir_bh); |
cb00ea35 | 1226 | if (nfi) { |
1da177e4 | 1227 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1228 | brelse(nfibh.ebh); |
1229 | brelse(nfibh.sbh); | |
1da177e4 LT |
1230 | } |
1231 | unlock_kernel(); | |
28de7948 | 1232 | |
1da177e4 LT |
1233 | return retval; |
1234 | } | |
1235 | ||
c5ef1c42 | 1236 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1237 | .lookup = udf_lookup, |
1238 | .create = udf_create, | |
1239 | .link = udf_link, | |
1240 | .unlink = udf_unlink, | |
1241 | .symlink = udf_symlink, | |
1242 | .mkdir = udf_mkdir, | |
1243 | .rmdir = udf_rmdir, | |
1244 | .mknod = udf_mknod, | |
1245 | .rename = udf_rename, | |
1da177e4 | 1246 | }; |