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> |
f845fced | 34 | #include <linux/crc-itu-t.h> |
221e583a | 35 | #include <linux/exportfs.h> |
1da177e4 | 36 | |
cb00ea35 CG |
37 | static inline int udf_match(int len1, const char *name1, int len2, |
38 | const char *name2) | |
1da177e4 LT |
39 | { |
40 | if (len1 != len2) | |
41 | return 0; | |
28de7948 | 42 | |
1da177e4 LT |
43 | return !memcmp(name1, name2, len1); |
44 | } | |
45 | ||
46 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 | 47 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
4b11111a | 48 | uint8_t *impuse, uint8_t *fileident) |
1da177e4 LT |
49 | { |
50 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag); | |
51 | uint16_t crc; | |
1da177e4 LT |
52 | int offset; |
53 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
54 | uint8_t lfi = cfi->lengthFileIdent; | |
55 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
28de7948 | 56 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
57 | int adinicb = 0; |
58 | ||
c0b34438 | 59 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 LT |
60 | adinicb = 1; |
61 | ||
62 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
63 | ||
cb00ea35 | 64 | if (impuse) { |
28de7948 CG |
65 | if (adinicb || (offset + liu < 0)) { |
66 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
67 | } else if (offset >= 0) { | |
1da177e4 | 68 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
28de7948 CG |
69 | } else { |
70 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
4b11111a MS |
71 | memcpy(fibh->ebh->b_data, impuse - offset, |
72 | liu + offset); | |
1da177e4 LT |
73 | } |
74 | } | |
75 | ||
76 | offset += liu; | |
77 | ||
cb00ea35 | 78 | if (fileident) { |
28de7948 CG |
79 | if (adinicb || (offset + lfi < 0)) { |
80 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
81 | } else if (offset >= 0) { | |
1da177e4 | 82 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 83 | } else { |
4b11111a MS |
84 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
85 | -offset); | |
86 | memcpy(fibh->ebh->b_data, fileident - offset, | |
87 | lfi + offset); | |
1da177e4 LT |
88 | } |
89 | } | |
90 | ||
91 | offset += lfi; | |
92 | ||
28de7948 CG |
93 | if (adinicb || (offset + padlen < 0)) { |
94 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
95 | } else if (offset >= 0) { | |
1da177e4 | 96 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
97 | } else { |
98 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
99 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
100 | } | |
101 | ||
f845fced BC |
102 | crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(tag), |
103 | sizeof(struct fileIdentDesc) - sizeof(tag)); | |
28de7948 CG |
104 | |
105 | if (fibh->sbh == fibh->ebh) { | |
f845fced | 106 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
4b11111a | 107 | crclen + sizeof(tag) - |
f845fced | 108 | sizeof(struct fileIdentDesc)); |
28de7948 | 109 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
f845fced | 110 | crc = crc_itu_t(crc, fibh->ebh->b_data + |
4b11111a MS |
111 | sizeof(struct fileIdentDesc) + |
112 | fibh->soffset, | |
113 | crclen + sizeof(tag) - | |
f845fced | 114 | sizeof(struct fileIdentDesc)); |
28de7948 | 115 | } else { |
f845fced BC |
116 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
117 | -fibh->soffset - sizeof(struct fileIdentDesc)); | |
118 | crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); | |
1da177e4 LT |
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); |
221e583a RR |
162 | int isdotdot = dentry->d_name.len == 2 && |
163 | dentry->d_name.name[0] == '.' && dentry->d_name.name[1] == '.'; | |
1da177e4 | 164 | |
af793295 JK |
165 | size = udf_ext0_offset(dir) + dir->i_size; |
166 | f_pos = udf_ext0_offset(dir); | |
1da177e4 | 167 | |
b80697c1 | 168 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 169 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
b80697c1 JK |
170 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
171 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
172 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) | |
173 | goto out_err; | |
1da177e4 | 174 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 175 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 176 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 177 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 178 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 179 | epos.offset -= sizeof(long_ad); |
4b11111a | 180 | } else |
1da177e4 LT |
181 | offset = 0; |
182 | ||
4b11111a | 183 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
b80697c1 JK |
184 | if (!fibh->sbh) |
185 | goto out_err; | |
1da177e4 LT |
186 | } |
187 | ||
b80697c1 JK |
188 | fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
189 | if (!fname) | |
190 | goto out_err; | |
191 | ||
af793295 | 192 | while (f_pos < size) { |
cb00ea35 CG |
193 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
194 | &elen, &offset); | |
b80697c1 JK |
195 | if (!fi) |
196 | goto out_err; | |
1da177e4 LT |
197 | |
198 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
199 | lfi = cfi->lengthFileIdent; | |
200 | ||
cb00ea35 | 201 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 202 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 203 | } else { |
1da177e4 LT |
204 | int poffset; /* Unpaded ending offset */ |
205 | ||
4b11111a MS |
206 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
207 | liu + lfi; | |
1da177e4 | 208 | |
4b11111a MS |
209 | if (poffset >= lfi) |
210 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
211 | poffset - lfi); | |
212 | else { | |
1da177e4 | 213 | nameptr = fname; |
4b11111a MS |
214 | memcpy(nameptr, fi->fileIdent + liu, |
215 | lfi - poffset); | |
216 | memcpy(nameptr + lfi - poffset, | |
217 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
218 | } |
219 | } | |
220 | ||
cb00ea35 CG |
221 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
222 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
223 | continue; |
224 | } | |
cb00ea35 CG |
225 | |
226 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
227 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
228 | continue; |
229 | } | |
230 | ||
221e583a RR |
231 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
232 | isdotdot) { | |
233 | brelse(epos.bh); | |
234 | return fi; | |
235 | } | |
236 | ||
1da177e4 LT |
237 | if (!lfi) |
238 | continue; | |
239 | ||
4b11111a MS |
240 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
241 | if (flen && udf_match(flen, fname, dentry->d_name.len, | |
b80697c1 JK |
242 | dentry->d_name.name)) |
243 | goto out_ok; | |
1da177e4 | 244 | } |
28de7948 | 245 | |
b80697c1 JK |
246 | out_err: |
247 | fi = NULL; | |
1da177e4 | 248 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
249 | brelse(fibh->ebh); |
250 | brelse(fibh->sbh); | |
b80697c1 | 251 | out_ok: |
3bf25cb4 | 252 | brelse(epos.bh); |
b80697c1 | 253 | kfree(fname); |
28de7948 | 254 | |
b80697c1 | 255 | return fi; |
1da177e4 LT |
256 | } |
257 | ||
cb00ea35 CG |
258 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
259 | struct nameidata *nd) | |
1da177e4 LT |
260 | { |
261 | struct inode *inode = NULL; | |
db9a369e | 262 | struct fileIdentDesc cfi; |
1da177e4 LT |
263 | struct udf_fileident_bh fibh; |
264 | ||
cb00ea35 | 265 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
266 | return ERR_PTR(-ENAMETOOLONG); |
267 | ||
268 | lock_kernel(); | |
269 | #ifdef UDF_RECOVERY | |
270 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 271 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
28de7948 CG |
272 | kernel_lb_addr lb = { |
273 | .logicalBlockNum = 0, | |
4b11111a MS |
274 | .partitionReferenceNum = |
275 | simple_strtoul(dentry->d_name.name + 3, | |
276 | NULL, 0), | |
28de7948 | 277 | }; |
1da177e4 | 278 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 279 | if (!inode) { |
1da177e4 LT |
280 | unlock_kernel(); |
281 | return ERR_PTR(-EACCES); | |
282 | } | |
4b11111a | 283 | } else |
28de7948 | 284 | #endif /* UDF_RECOVERY */ |
1da177e4 | 285 | |
cb00ea35 | 286 | if (udf_find_entry(dir, dentry, &fibh, &cfi)) { |
1da177e4 | 287 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
288 | brelse(fibh.ebh); |
289 | brelse(fibh.sbh); | |
1da177e4 LT |
290 | |
291 | inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); | |
cb00ea35 | 292 | if (!inode) { |
1da177e4 LT |
293 | unlock_kernel(); |
294 | return ERR_PTR(-EACCES); | |
295 | } | |
296 | } | |
297 | unlock_kernel(); | |
28de7948 | 298 | |
221e583a | 299 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
300 | } |
301 | ||
cb00ea35 CG |
302 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
303 | struct dentry *dentry, | |
304 | struct udf_fileident_bh *fibh, | |
305 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 306 | { |
6c79e987 | 307 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 308 | struct fileIdentDesc *fi = NULL; |
b80697c1 | 309 | char *name = NULL; |
1da177e4 LT |
310 | int namelen; |
311 | loff_t f_pos; | |
af793295 | 312 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
313 | int nfidlen; |
314 | uint8_t lfi; | |
315 | uint16_t liu; | |
316 | int block; | |
ff116fc8 | 317 | kernel_lb_addr eloc; |
9afadc4b | 318 | uint32_t elen = 0; |
60448b1d | 319 | sector_t offset; |
28de7948 | 320 | struct extent_position epos = {}; |
48d6d8ff | 321 | struct udf_inode_info *dinfo; |
1da177e4 | 322 | |
b80697c1 JK |
323 | fibh->sbh = fibh->ebh = NULL; |
324 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); | |
325 | if (!name) { | |
326 | *err = -ENOMEM; | |
327 | goto out_err; | |
328 | } | |
329 | ||
cb00ea35 CG |
330 | if (dentry) { |
331 | if (!dentry->d_name.len) { | |
1da177e4 | 332 | *err = -EINVAL; |
b80697c1 | 333 | goto out_err; |
1da177e4 | 334 | } |
4b11111a MS |
335 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
336 | dentry->d_name.len); | |
337 | if (!namelen) { | |
1da177e4 | 338 | *err = -ENAMETOOLONG; |
b80697c1 | 339 | goto out_err; |
1da177e4 | 340 | } |
28de7948 | 341 | } else { |
1da177e4 | 342 | namelen = 0; |
28de7948 | 343 | } |
1da177e4 LT |
344 | |
345 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
346 | ||
af793295 | 347 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 348 | |
af793295 | 349 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 350 | dinfo = UDF_I(dir); |
b80697c1 JK |
351 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
352 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
353 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { | |
354 | block = udf_get_lb_pblock(dir->i_sb, | |
355 | dinfo->i_location, 0); | |
356 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
357 | goto add; | |
358 | } | |
1da177e4 | 359 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 360 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 361 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 362 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 363 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 364 | epos.offset -= sizeof(long_ad); |
4b11111a | 365 | } else |
1da177e4 LT |
366 | offset = 0; |
367 | ||
4b11111a MS |
368 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
369 | if (!fibh->sbh) { | |
1da177e4 | 370 | *err = -EIO; |
b80697c1 | 371 | goto out_err; |
1da177e4 LT |
372 | } |
373 | ||
48d6d8ff | 374 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 LT |
375 | } |
376 | ||
af793295 | 377 | while (f_pos < size) { |
cb00ea35 CG |
378 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
379 | &elen, &offset); | |
1da177e4 | 380 | |
cb00ea35 | 381 | if (!fi) { |
1da177e4 | 382 | *err = -EIO; |
b80697c1 | 383 | goto out_err; |
1da177e4 LT |
384 | } |
385 | ||
386 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
387 | lfi = cfi->lengthFileIdent; | |
388 | ||
cb00ea35 | 389 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
390 | if (((sizeof(struct fileIdentDesc) + |
391 | liu + lfi + 3) & ~3) == nfidlen) { | |
1da177e4 LT |
392 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
393 | cfi->fileVersionNum = cpu_to_le16(1); | |
394 | cfi->fileCharacteristics = 0; | |
395 | cfi->lengthFileIdent = namelen; | |
396 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
397 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
398 | name)) | |
b80697c1 | 399 | goto out_ok; |
4b11111a | 400 | else { |
1da177e4 | 401 | *err = -EIO; |
b80697c1 | 402 | goto out_err; |
1da177e4 LT |
403 | } |
404 | } | |
405 | } | |
1da177e4 LT |
406 | } |
407 | ||
28de7948 | 408 | add: |
9afadc4b JK |
409 | /* Is there any extent whose size we need to round up? */ |
410 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && elen) { | |
05343c4f JK |
411 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); |
412 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
413 | epos.offset -= sizeof(short_ad); | |
414 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
415 | epos.offset -= sizeof(long_ad); | |
416 | udf_write_aext(dir, &epos, eloc, elen, 1); | |
417 | } | |
1da177e4 LT |
418 | f_pos += nfidlen; |
419 | ||
48d6d8ff | 420 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 421 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 422 | brelse(epos.bh); |
ff116fc8 | 423 | epos.bh = NULL; |
1da177e4 LT |
424 | fibh->soffset -= udf_ext0_offset(dir); |
425 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 426 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 427 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
428 | brelse(fibh->ebh); |
429 | brelse(fibh->sbh); | |
4b11111a MS |
430 | fibh->sbh = fibh->ebh = |
431 | udf_expand_dir_adinicb(dir, &block, err); | |
432 | if (!fibh->sbh) | |
b80697c1 | 433 | goto out_err; |
48d6d8ff | 434 | epos.block = dinfo->i_location; |
ff116fc8 | 435 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
436 | /* Load extent udf_expand_dir_adinicb() has created */ |
437 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
438 | } |
439 | ||
cb00ea35 | 440 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
441 | fibh->soffset = fibh->eoffset; |
442 | fibh->eoffset += nfidlen; | |
cb00ea35 | 443 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 444 | brelse(fibh->sbh); |
1da177e4 LT |
445 | fibh->sbh = fibh->ebh; |
446 | } | |
447 | ||
48d6d8ff MS |
448 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
449 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 450 | fi = (struct fileIdentDesc *) |
48d6d8ff | 451 | (dinfo->i_ext.i_data + |
c0b34438 | 452 | fibh->soffset - |
4b11111a | 453 | udf_ext0_offset(dir) + |
48d6d8ff | 454 | dinfo->i_lenEAttr); |
cb00ea35 | 455 | } else { |
4b11111a MS |
456 | block = eloc.logicalBlockNum + |
457 | ((elen - 1) >> | |
458 | dir->i_sb->s_blocksize_bits); | |
459 | fi = (struct fileIdentDesc *) | |
460 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 461 | } |
cb00ea35 | 462 | } else { |
1da177e4 LT |
463 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
464 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 465 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 466 | brelse(fibh->sbh); |
1da177e4 LT |
467 | fibh->sbh = fibh->ebh; |
468 | } | |
469 | ||
470 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 471 | dir->i_sb->s_blocksize_bits); |
4b11111a | 472 | fibh->ebh = udf_bread(dir, |
af793295 | 473 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
474 | if (!fibh->ebh) |
475 | goto out_err; | |
1da177e4 | 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)) { |
1da177e4 | 506 | dir->i_size += nfidlen; |
48d6d8ff MS |
507 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
508 | dinfo->i_lenAlloc += nfidlen; | |
1da177e4 | 509 | mark_inode_dirty(dir); |
b80697c1 | 510 | goto out_ok; |
cb00ea35 | 511 | } else { |
1da177e4 | 512 | *err = -EIO; |
b80697c1 | 513 | goto out_err; |
1da177e4 | 514 | } |
b80697c1 JK |
515 | |
516 | out_err: | |
517 | fi = NULL; | |
518 | if (fibh->sbh != fibh->ebh) | |
519 | brelse(fibh->ebh); | |
520 | brelse(fibh->sbh); | |
521 | out_ok: | |
522 | brelse(epos.bh); | |
523 | kfree(name); | |
524 | return fi; | |
1da177e4 LT |
525 | } |
526 | ||
527 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
528 | struct udf_fileident_bh *fibh, |
529 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
530 | { |
531 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 532 | |
1da177e4 LT |
533 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
534 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 535 | |
1da177e4 LT |
536 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
537 | } | |
538 | ||
cb00ea35 CG |
539 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
540 | struct nameidata *nd) | |
1da177e4 LT |
541 | { |
542 | struct udf_fileident_bh fibh; | |
543 | struct inode *inode; | |
544 | struct fileIdentDesc cfi, *fi; | |
545 | int err; | |
48d6d8ff | 546 | struct udf_inode_info *iinfo; |
1da177e4 LT |
547 | |
548 | lock_kernel(); | |
549 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 550 | if (!inode) { |
1da177e4 LT |
551 | unlock_kernel(); |
552 | return err; | |
553 | } | |
554 | ||
48d6d8ff MS |
555 | iinfo = UDF_I(inode); |
556 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
557 | inode->i_data.a_ops = &udf_adinicb_aops; |
558 | else | |
559 | inode->i_data.a_ops = &udf_aops; | |
560 | inode->i_op = &udf_file_inode_operations; | |
561 | inode->i_fop = &udf_file_operations; | |
562 | inode->i_mode = mode; | |
563 | mark_inode_dirty(inode); | |
564 | ||
4b11111a MS |
565 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
566 | if (!fi) { | |
cb00ea35 | 567 | inode->i_nlink--; |
1da177e4 LT |
568 | mark_inode_dirty(inode); |
569 | iput(inode); | |
570 | unlock_kernel(); | |
571 | return err; | |
572 | } | |
573 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 574 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 575 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 576 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 577 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 578 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 579 | mark_inode_dirty(dir); |
1da177e4 | 580 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
581 | brelse(fibh.ebh); |
582 | brelse(fibh.sbh); | |
1da177e4 LT |
583 | unlock_kernel(); |
584 | d_instantiate(dentry, inode); | |
28de7948 | 585 | |
1da177e4 LT |
586 | return 0; |
587 | } | |
588 | ||
cb00ea35 CG |
589 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
590 | dev_t rdev) | |
1da177e4 | 591 | { |
cb00ea35 | 592 | struct inode *inode; |
1da177e4 LT |
593 | struct udf_fileident_bh fibh; |
594 | struct fileIdentDesc cfi, *fi; | |
595 | int err; | |
48d6d8ff | 596 | struct udf_inode_info *iinfo; |
1da177e4 LT |
597 | |
598 | if (!old_valid_dev(rdev)) | |
599 | return -EINVAL; | |
600 | ||
601 | lock_kernel(); | |
602 | err = -EIO; | |
603 | inode = udf_new_inode(dir, mode, &err); | |
604 | if (!inode) | |
605 | goto out; | |
606 | ||
48d6d8ff | 607 | iinfo = UDF_I(inode); |
1da177e4 LT |
608 | inode->i_uid = current->fsuid; |
609 | init_special_inode(inode, mode, rdev); | |
4b11111a MS |
610 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
611 | if (!fi) { | |
cb00ea35 | 612 | inode->i_nlink--; |
1da177e4 LT |
613 | mark_inode_dirty(inode); |
614 | iput(inode); | |
615 | unlock_kernel(); | |
616 | return err; | |
617 | } | |
618 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 619 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 620 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 621 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 622 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 623 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 624 | mark_inode_dirty(dir); |
1da177e4 LT |
625 | mark_inode_dirty(inode); |
626 | ||
627 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
628 | brelse(fibh.ebh); |
629 | brelse(fibh.sbh); | |
1da177e4 LT |
630 | d_instantiate(dentry, inode); |
631 | err = 0; | |
28de7948 CG |
632 | |
633 | out: | |
1da177e4 LT |
634 | unlock_kernel(); |
635 | return err; | |
636 | } | |
637 | ||
cb00ea35 | 638 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 639 | { |
cb00ea35 | 640 | struct inode *inode; |
1da177e4 LT |
641 | struct udf_fileident_bh fibh; |
642 | struct fileIdentDesc cfi, *fi; | |
643 | int err; | |
48d6d8ff MS |
644 | struct udf_inode_info *dinfo = UDF_I(dir); |
645 | struct udf_inode_info *iinfo; | |
1da177e4 LT |
646 | |
647 | lock_kernel(); | |
648 | err = -EMLINK; | |
cb00ea35 | 649 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
650 | goto out; |
651 | ||
652 | err = -EIO; | |
653 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
654 | if (!inode) | |
655 | goto out; | |
656 | ||
48d6d8ff | 657 | iinfo = UDF_I(inode); |
1da177e4 LT |
658 | inode->i_op = &udf_dir_inode_operations; |
659 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
660 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
661 | if (!fi) { | |
1da177e4 LT |
662 | inode->i_nlink--; |
663 | mark_inode_dirty(inode); | |
664 | iput(inode); | |
665 | goto out; | |
666 | } | |
667 | inode->i_nlink = 2; | |
668 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 669 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 670 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 671 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
672 | cfi.fileCharacteristics = |
673 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 674 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 675 | brelse(fibh.sbh); |
1da177e4 LT |
676 | inode->i_mode = S_IFDIR | mode; |
677 | if (dir->i_mode & S_ISGID) | |
678 | inode->i_mode |= S_ISGID; | |
679 | mark_inode_dirty(inode); | |
680 | ||
4b11111a MS |
681 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
682 | if (!fi) { | |
1da177e4 LT |
683 | inode->i_nlink = 0; |
684 | mark_inode_dirty(inode); | |
685 | iput(inode); | |
686 | goto out; | |
687 | } | |
688 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 689 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 690 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 691 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
692 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
693 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 694 | inc_nlink(dir); |
1da177e4 LT |
695 | mark_inode_dirty(dir); |
696 | d_instantiate(dentry, inode); | |
697 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
698 | brelse(fibh.ebh); |
699 | brelse(fibh.sbh); | |
1da177e4 | 700 | err = 0; |
28de7948 CG |
701 | |
702 | out: | |
1da177e4 LT |
703 | unlock_kernel(); |
704 | return err; | |
705 | } | |
706 | ||
707 | static int empty_dir(struct inode *dir) | |
708 | { | |
709 | struct fileIdentDesc *fi, cfi; | |
710 | struct udf_fileident_bh fibh; | |
711 | loff_t f_pos; | |
af793295 | 712 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 713 | int block; |
ff116fc8 JK |
714 | kernel_lb_addr eloc; |
715 | uint32_t elen; | |
60448b1d | 716 | sector_t offset; |
28de7948 | 717 | struct extent_position epos = {}; |
48d6d8ff | 718 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 719 | |
af793295 JK |
720 | f_pos = udf_ext0_offset(dir); |
721 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 722 | |
48d6d8ff | 723 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 724 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 725 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
726 | &epos, &eloc, &elen, &offset) == |
727 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 728 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 729 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 730 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 731 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 732 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 733 | epos.offset -= sizeof(long_ad); |
4b11111a | 734 | } else |
1da177e4 LT |
735 | offset = 0; |
736 | ||
4b11111a MS |
737 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
738 | if (!fibh.sbh) { | |
3bf25cb4 | 739 | brelse(epos.bh); |
1da177e4 LT |
740 | return 0; |
741 | } | |
cb00ea35 | 742 | } else { |
3bf25cb4 | 743 | brelse(epos.bh); |
1da177e4 LT |
744 | return 0; |
745 | } | |
746 | ||
af793295 | 747 | while (f_pos < size) { |
cb00ea35 CG |
748 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
749 | &elen, &offset); | |
cb00ea35 | 750 | if (!fi) { |
1da177e4 | 751 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
752 | brelse(fibh.ebh); |
753 | brelse(fibh.sbh); | |
754 | brelse(epos.bh); | |
1da177e4 LT |
755 | return 0; |
756 | } | |
757 | ||
28de7948 CG |
758 | if (cfi.lengthFileIdent && |
759 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 760 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
761 | brelse(fibh.ebh); |
762 | brelse(fibh.sbh); | |
763 | brelse(epos.bh); | |
1da177e4 LT |
764 | return 0; |
765 | } | |
766 | } | |
28de7948 | 767 | |
1da177e4 | 768 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
769 | brelse(fibh.ebh); |
770 | brelse(fibh.sbh); | |
771 | brelse(epos.bh); | |
28de7948 | 772 | |
1da177e4 LT |
773 | return 1; |
774 | } | |
775 | ||
cb00ea35 | 776 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
777 | { |
778 | int retval; | |
cb00ea35 | 779 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
780 | struct udf_fileident_bh fibh; |
781 | struct fileIdentDesc *fi, cfi; | |
782 | kernel_lb_addr tloc; | |
783 | ||
784 | retval = -ENOENT; | |
785 | lock_kernel(); | |
786 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
787 | if (!fi) | |
788 | goto out; | |
789 | ||
790 | retval = -EIO; | |
791 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
792 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
793 | goto end_rmdir; | |
794 | retval = -ENOTEMPTY; | |
795 | if (!empty_dir(inode)) | |
796 | goto end_rmdir; | |
797 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
798 | if (retval) | |
799 | goto end_rmdir; | |
800 | if (inode->i_nlink != 2) | |
801 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
802 | "empty directory has nlink != 2 (%d)", |
803 | inode->i_nlink); | |
ce71ec36 | 804 | clear_nlink(inode); |
1da177e4 | 805 | inode->i_size = 0; |
c007c06e | 806 | inode_dec_link_count(dir); |
4b11111a MS |
807 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
808 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
809 | mark_inode_dirty(dir); |
810 | ||
28de7948 | 811 | end_rmdir: |
1da177e4 | 812 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
813 | brelse(fibh.ebh); |
814 | brelse(fibh.sbh); | |
28de7948 CG |
815 | |
816 | out: | |
1da177e4 LT |
817 | unlock_kernel(); |
818 | return retval; | |
819 | } | |
820 | ||
cb00ea35 | 821 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
822 | { |
823 | int retval; | |
cb00ea35 | 824 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
825 | struct udf_fileident_bh fibh; |
826 | struct fileIdentDesc *fi; | |
827 | struct fileIdentDesc cfi; | |
828 | kernel_lb_addr tloc; | |
829 | ||
830 | retval = -ENOENT; | |
831 | lock_kernel(); | |
832 | fi = udf_find_entry(dir, dentry, &fibh, &cfi); | |
833 | if (!fi) | |
834 | goto out; | |
835 | ||
836 | retval = -EIO; | |
837 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
838 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
839 | goto end_unlink; | |
840 | ||
cb00ea35 | 841 | if (!inode->i_nlink) { |
1da177e4 | 842 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 843 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
844 | inode->i_nlink = 1; |
845 | } | |
846 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
847 | if (retval) | |
848 | goto end_unlink; | |
849 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
850 | mark_inode_dirty(dir); | |
9a53c3a7 | 851 | inode_dec_link_count(inode); |
1da177e4 LT |
852 | inode->i_ctime = dir->i_ctime; |
853 | retval = 0; | |
854 | ||
28de7948 | 855 | end_unlink: |
1da177e4 | 856 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
857 | brelse(fibh.ebh); |
858 | brelse(fibh.sbh); | |
28de7948 CG |
859 | |
860 | out: | |
1da177e4 LT |
861 | unlock_kernel(); |
862 | return retval; | |
863 | } | |
864 | ||
cb00ea35 CG |
865 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
866 | const char *symname) | |
1da177e4 | 867 | { |
cb00ea35 | 868 | struct inode *inode; |
1da177e4 LT |
869 | struct pathComponent *pc; |
870 | char *compstart; | |
871 | struct udf_fileident_bh fibh; | |
28de7948 | 872 | struct extent_position epos = {}; |
1da177e4 LT |
873 | int eoffset, elen = 0; |
874 | struct fileIdentDesc *fi; | |
875 | struct fileIdentDesc cfi; | |
876 | char *ea; | |
877 | int err; | |
878 | int block; | |
b80697c1 | 879 | char *name = NULL; |
1da177e4 | 880 | int namelen; |
6c79e987 | 881 | struct buffer_head *bh; |
48d6d8ff | 882 | struct udf_inode_info *iinfo; |
1da177e4 LT |
883 | |
884 | lock_kernel(); | |
4b11111a MS |
885 | inode = udf_new_inode(dir, S_IFLNK, &err); |
886 | if (!inode) | |
1da177e4 LT |
887 | goto out; |
888 | ||
b80697c1 JK |
889 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
890 | if (!name) { | |
891 | err = -ENOMEM; | |
892 | goto out_no_entry; | |
893 | } | |
894 | ||
48d6d8ff | 895 | iinfo = UDF_I(inode); |
1da177e4 LT |
896 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
897 | inode->i_data.a_ops = &udf_symlink_aops; | |
898 | inode->i_op = &page_symlink_inode_operations; | |
899 | ||
48d6d8ff | 900 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 | 901 | kernel_lb_addr eloc; |
78e917d5 | 902 | uint32_t bsize; |
1da177e4 LT |
903 | |
904 | block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
905 | iinfo->i_location.partitionReferenceNum, |
906 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
907 | if (!block) |
908 | goto out_no_entry; | |
48d6d8ff | 909 | epos.block = iinfo->i_location; |
ff116fc8 JK |
910 | epos.offset = udf_file_entry_alloc_offset(inode); |
911 | epos.bh = NULL; | |
1da177e4 | 912 | eloc.logicalBlockNum = block; |
4b11111a | 913 | eloc.partitionReferenceNum = |
48d6d8ff | 914 | iinfo->i_location.partitionReferenceNum; |
78e917d5 HH |
915 | bsize = inode->i_sb->s_blocksize; |
916 | iinfo->i_lenExtents = bsize; | |
917 | udf_add_aext(inode, &epos, eloc, bsize, 0); | |
3bf25cb4 | 918 | brelse(epos.bh); |
1da177e4 LT |
919 | |
920 | block = udf_get_pblock(inode->i_sb, block, | |
48d6d8ff | 921 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 922 | 0); |
ff116fc8 JK |
923 | epos.bh = udf_tread(inode->i_sb, block); |
924 | lock_buffer(epos.bh); | |
925 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
926 | set_buffer_uptodate(epos.bh); | |
927 | unlock_buffer(epos.bh); | |
928 | mark_buffer_dirty_inode(epos.bh, inode); | |
929 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
930 | } else |
931 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 LT |
932 | |
933 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
934 | pc = (struct pathComponent *)ea; | |
935 | ||
cb00ea35 CG |
936 | if (*symname == '/') { |
937 | do { | |
1da177e4 LT |
938 | symname++; |
939 | } while (*symname == '/'); | |
940 | ||
941 | pc->componentType = 1; | |
942 | pc->lengthComponentIdent = 0; | |
943 | pc->componentFileVersionNum = 0; | |
944 | pc += sizeof(struct pathComponent); | |
945 | elen += sizeof(struct pathComponent); | |
946 | } | |
947 | ||
948 | err = -ENAMETOOLONG; | |
949 | ||
cb00ea35 | 950 | while (*symname) { |
1da177e4 LT |
951 | if (elen + sizeof(struct pathComponent) > eoffset) |
952 | goto out_no_entry; | |
953 | ||
954 | pc = (struct pathComponent *)(ea + elen); | |
955 | ||
956 | compstart = (char *)symname; | |
957 | ||
cb00ea35 | 958 | do { |
1da177e4 LT |
959 | symname++; |
960 | } while (*symname && *symname != '/'); | |
961 | ||
962 | pc->componentType = 5; | |
963 | pc->lengthComponentIdent = 0; | |
964 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
965 | if (compstart[0] == '.') { |
966 | if ((symname - compstart) == 1) | |
1da177e4 | 967 | pc->componentType = 4; |
4b11111a MS |
968 | else if ((symname - compstart) == 2 && |
969 | compstart[1] == '.') | |
1da177e4 LT |
970 | pc->componentType = 3; |
971 | } | |
972 | ||
cb00ea35 | 973 | if (pc->componentType == 5) { |
28de7948 CG |
974 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
975 | symname - compstart); | |
976 | if (!namelen) | |
1da177e4 LT |
977 | goto out_no_entry; |
978 | ||
4b11111a MS |
979 | if (elen + sizeof(struct pathComponent) + namelen > |
980 | eoffset) | |
1da177e4 LT |
981 | goto out_no_entry; |
982 | else | |
983 | pc->lengthComponentIdent = namelen; | |
984 | ||
985 | memcpy(pc->componentIdent, name, namelen); | |
986 | } | |
987 | ||
988 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
989 | ||
cb00ea35 CG |
990 | if (*symname) { |
991 | do { | |
1da177e4 LT |
992 | symname++; |
993 | } while (*symname == '/'); | |
994 | } | |
995 | } | |
996 | ||
3bf25cb4 | 997 | brelse(epos.bh); |
1da177e4 | 998 | inode->i_size = elen; |
48d6d8ff MS |
999 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1000 | iinfo->i_lenAlloc = inode->i_size; | |
1da177e4 LT |
1001 | mark_inode_dirty(inode); |
1002 | ||
4b11111a MS |
1003 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1004 | if (!fi) | |
1da177e4 LT |
1005 | goto out_no_entry; |
1006 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 1007 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
6c79e987 MS |
1008 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1009 | if (bh) { | |
4b11111a MS |
1010 | struct logicalVolIntegrityDesc *lvid = |
1011 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1012 | struct logicalVolHeaderDesc *lvhd; |
1013 | uint64_t uniqueID; | |
4b11111a MS |
1014 | lvhd = (struct logicalVolHeaderDesc *) |
1015 | lvid->logicalVolContentsUse; | |
1da177e4 | 1016 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1017 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1018 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1019 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1020 | uniqueID += 16; | |
1021 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1022 | mark_buffer_dirty(bh); |
1da177e4 LT |
1023 | } |
1024 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1025 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1026 | mark_inode_dirty(dir); |
1da177e4 | 1027 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1028 | brelse(fibh.ebh); |
1029 | brelse(fibh.sbh); | |
1da177e4 LT |
1030 | d_instantiate(dentry, inode); |
1031 | err = 0; | |
1032 | ||
28de7948 | 1033 | out: |
b80697c1 | 1034 | kfree(name); |
1da177e4 LT |
1035 | unlock_kernel(); |
1036 | return err; | |
1037 | ||
28de7948 | 1038 | out_no_entry: |
9a53c3a7 | 1039 | inode_dec_link_count(inode); |
1da177e4 LT |
1040 | iput(inode); |
1041 | goto out; | |
1042 | } | |
1043 | ||
cb00ea35 CG |
1044 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1045 | struct dentry *dentry) | |
1da177e4 LT |
1046 | { |
1047 | struct inode *inode = old_dentry->d_inode; | |
1048 | struct udf_fileident_bh fibh; | |
1049 | struct fileIdentDesc cfi, *fi; | |
1050 | int err; | |
6c79e987 | 1051 | struct buffer_head *bh; |
1da177e4 LT |
1052 | |
1053 | lock_kernel(); | |
cb00ea35 | 1054 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1055 | unlock_kernel(); |
1056 | return -EMLINK; | |
1057 | } | |
1058 | ||
4b11111a MS |
1059 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1060 | if (!fi) { | |
1da177e4 LT |
1061 | unlock_kernel(); |
1062 | return err; | |
1063 | } | |
1064 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1065 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1066 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1067 | if (bh) { | |
4b11111a MS |
1068 | struct logicalVolIntegrityDesc *lvid = |
1069 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1070 | struct logicalVolHeaderDesc *lvhd; |
1071 | uint64_t uniqueID; | |
4b11111a MS |
1072 | lvhd = (struct logicalVolHeaderDesc *) |
1073 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1074 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1075 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1076 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1077 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1078 | uniqueID += 16; | |
1079 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1080 | mark_buffer_dirty(bh); |
1da177e4 LT |
1081 | } |
1082 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1083 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1084 | mark_inode_dirty(dir); |
28de7948 | 1085 | |
1da177e4 | 1086 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1087 | brelse(fibh.ebh); |
1088 | brelse(fibh.sbh); | |
d8c76e6f | 1089 | inc_nlink(inode); |
1da177e4 LT |
1090 | inode->i_ctime = current_fs_time(inode->i_sb); |
1091 | mark_inode_dirty(inode); | |
1092 | atomic_inc(&inode->i_count); | |
1093 | d_instantiate(dentry, inode); | |
1094 | unlock_kernel(); | |
28de7948 | 1095 | |
1da177e4 LT |
1096 | return 0; |
1097 | } | |
1098 | ||
1099 | /* Anybody can rename anything with this: the permission checks are left to the | |
1100 | * higher-level routines. | |
1101 | */ | |
cb00ea35 CG |
1102 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1103 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1104 | { |
cb00ea35 CG |
1105 | struct inode *old_inode = old_dentry->d_inode; |
1106 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1107 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1108 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1109 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1110 | struct buffer_head *dir_bh = NULL; |
1111 | int retval = -ENOENT; | |
1112 | kernel_lb_addr tloc; | |
48d6d8ff | 1113 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 LT |
1114 | |
1115 | lock_kernel(); | |
4b11111a MS |
1116 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); |
1117 | if (ofi) { | |
1da177e4 | 1118 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1119 | brelse(ofibh.ebh); |
1120 | brelse(ofibh.sbh); | |
1da177e4 LT |
1121 | } |
1122 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1123 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1124 | != old_inode->i_ino) |
1da177e4 LT |
1125 | goto end_rename; |
1126 | ||
1127 | nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); | |
cb00ea35 CG |
1128 | if (nfi) { |
1129 | if (!new_inode) { | |
1da177e4 | 1130 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1131 | brelse(nfibh.ebh); |
1132 | brelse(nfibh.sbh); | |
1da177e4 LT |
1133 | nfi = NULL; |
1134 | } | |
1135 | } | |
cb00ea35 | 1136 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1137 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1138 | |
cb00ea35 | 1139 | if (new_inode) { |
1da177e4 LT |
1140 | retval = -ENOTEMPTY; |
1141 | if (!empty_dir(new_inode)) | |
1142 | goto end_rename; | |
1143 | } | |
1144 | retval = -EIO; | |
48d6d8ff | 1145 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1146 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1147 | old_iinfo->i_ext.i_data - |
1148 | (old_iinfo->i_efe ? | |
4b11111a MS |
1149 | sizeof(struct extendedFileEntry) : |
1150 | sizeof(struct fileEntry)), | |
1151 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1152 | } else { |
1da177e4 LT |
1153 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1154 | if (!dir_bh) | |
1155 | goto end_rename; | |
4b11111a MS |
1156 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1157 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1158 | } |
1159 | if (!dir_fi) | |
1160 | goto end_rename; | |
1161 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
4b11111a MS |
1162 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != |
1163 | old_dir->i_ino) | |
1da177e4 LT |
1164 | goto end_rename; |
1165 | ||
1166 | retval = -EMLINK; | |
4b11111a MS |
1167 | if (!new_inode && |
1168 | new_dir->i_nlink >= | |
1169 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1170 | goto end_rename; |
1171 | } | |
cb00ea35 | 1172 | if (!nfi) { |
4b11111a MS |
1173 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1174 | &retval); | |
1da177e4 LT |
1175 | if (!nfi) |
1176 | goto end_rename; | |
1177 | } | |
1178 | ||
1179 | /* | |
1180 | * Like most other Unix systems, set the ctime for inodes on a | |
1181 | * rename. | |
1182 | */ | |
1183 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1184 | mark_inode_dirty(old_inode); | |
1185 | ||
1186 | /* | |
1187 | * ok, that's it | |
1188 | */ | |
1189 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1190 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1191 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1192 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1193 | ||
1194 | /* The old fid may have moved - find it again */ | |
1195 | ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); | |
1196 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); | |
1197 | ||
cb00ea35 | 1198 | if (new_inode) { |
1da177e4 | 1199 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1200 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1201 | } |
1202 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1203 | mark_inode_dirty(old_dir); | |
1204 | ||
cb00ea35 | 1205 | if (dir_fi) { |
c0b34438 | 1206 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1207 | udf_update_tag((char *)dir_fi, |
1208 | (sizeof(struct fileIdentDesc) + | |
1209 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1210 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1211 | mark_inode_dirty(old_inode); |
4b11111a | 1212 | else |
1da177e4 | 1213 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1214 | |
9a53c3a7 | 1215 | inode_dec_link_count(old_dir); |
4b11111a | 1216 | if (new_inode) |
9a53c3a7 | 1217 | inode_dec_link_count(new_inode); |
4b11111a | 1218 | else { |
d8c76e6f | 1219 | inc_nlink(new_dir); |
1da177e4 LT |
1220 | mark_inode_dirty(new_dir); |
1221 | } | |
1222 | } | |
1223 | ||
cb00ea35 | 1224 | if (ofi) { |
1da177e4 | 1225 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1226 | brelse(ofibh.ebh); |
1227 | brelse(ofibh.sbh); | |
1da177e4 LT |
1228 | } |
1229 | ||
1230 | retval = 0; | |
1231 | ||
28de7948 | 1232 | end_rename: |
3bf25cb4 | 1233 | brelse(dir_bh); |
cb00ea35 | 1234 | if (nfi) { |
1da177e4 | 1235 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1236 | brelse(nfibh.ebh); |
1237 | brelse(nfibh.sbh); | |
1da177e4 LT |
1238 | } |
1239 | unlock_kernel(); | |
28de7948 | 1240 | |
1da177e4 LT |
1241 | return retval; |
1242 | } | |
1243 | ||
221e583a RR |
1244 | static struct dentry *udf_get_parent(struct dentry *child) |
1245 | { | |
1246 | struct dentry *parent; | |
1247 | struct inode *inode = NULL; | |
1248 | struct dentry dotdot; | |
1249 | struct fileIdentDesc cfi; | |
1250 | struct udf_fileident_bh fibh; | |
1251 | ||
1252 | dotdot.d_name.name = ".."; | |
1253 | dotdot.d_name.len = 2; | |
1254 | ||
1255 | lock_kernel(); | |
1256 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) | |
1257 | goto out_unlock; | |
1258 | ||
1259 | if (fibh.sbh != fibh.ebh) | |
1260 | brelse(fibh.ebh); | |
1261 | brelse(fibh.sbh); | |
1262 | ||
1263 | inode = udf_iget(child->d_inode->i_sb, | |
1264 | lelb_to_cpu(cfi.icb.extLocation)); | |
1265 | if (!inode) | |
1266 | goto out_unlock; | |
1267 | unlock_kernel(); | |
1268 | ||
1269 | parent = d_alloc_anon(inode); | |
1270 | if (!parent) { | |
1271 | iput(inode); | |
1272 | parent = ERR_PTR(-ENOMEM); | |
1273 | } | |
1274 | ||
1275 | return parent; | |
1276 | out_unlock: | |
1277 | unlock_kernel(); | |
1278 | return ERR_PTR(-EACCES); | |
1279 | } | |
1280 | ||
1281 | ||
1282 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1283 | u16 partref, __u32 generation) | |
1284 | { | |
1285 | struct inode *inode; | |
1286 | struct dentry *result; | |
1287 | kernel_lb_addr loc; | |
1288 | ||
1289 | if (block == 0) | |
1290 | return ERR_PTR(-ESTALE); | |
1291 | ||
1292 | loc.logicalBlockNum = block; | |
1293 | loc.partitionReferenceNum = partref; | |
1294 | inode = udf_iget(sb, loc); | |
1295 | ||
1296 | if (inode == NULL) | |
1297 | return ERR_PTR(-ENOMEM); | |
1298 | ||
1299 | if (generation && inode->i_generation != generation) { | |
1300 | iput(inode); | |
1301 | return ERR_PTR(-ESTALE); | |
1302 | } | |
1303 | result = d_alloc_anon(inode); | |
1304 | if (!result) { | |
1305 | iput(inode); | |
1306 | return ERR_PTR(-ENOMEM); | |
1307 | } | |
1308 | return result; | |
1309 | } | |
1310 | ||
1311 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1312 | struct fid *fid, int fh_len, int fh_type) | |
1313 | { | |
1314 | if ((fh_len != 3 && fh_len != 5) || | |
1315 | (fh_type != FILEID_UDF_WITH_PARENT && | |
1316 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1317 | return NULL; | |
1318 | ||
1319 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1320 | fid->udf.generation); | |
1321 | } | |
1322 | ||
1323 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1324 | struct fid *fid, int fh_len, int fh_type) | |
1325 | { | |
1326 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) | |
1327 | return NULL; | |
1328 | ||
1329 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1330 | fid->udf.parent_partref, | |
1331 | fid->udf.parent_generation); | |
1332 | } | |
1333 | static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, | |
1334 | int connectable) | |
1335 | { | |
1336 | int len = *lenp; | |
1337 | struct inode *inode = de->d_inode; | |
1338 | kernel_lb_addr location = UDF_I(inode)->i_location; | |
1339 | struct fid *fid = (struct fid *)fh; | |
1340 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1341 | ||
1342 | if (len < 3 || (connectable && len < 5)) | |
1343 | return 255; | |
1344 | ||
1345 | *lenp = 3; | |
1346 | fid->udf.block = location.logicalBlockNum; | |
1347 | fid->udf.partref = location.partitionReferenceNum; | |
1348 | fid->udf.generation = inode->i_generation; | |
1349 | ||
1350 | if (connectable && !S_ISDIR(inode->i_mode)) { | |
1351 | spin_lock(&de->d_lock); | |
1352 | inode = de->d_parent->d_inode; | |
1353 | location = UDF_I(inode)->i_location; | |
1354 | fid->udf.parent_block = location.logicalBlockNum; | |
1355 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1356 | fid->udf.parent_generation = inode->i_generation; | |
1357 | spin_unlock(&de->d_lock); | |
1358 | *lenp = 5; | |
1359 | type = FILEID_UDF_WITH_PARENT; | |
1360 | } | |
1361 | ||
1362 | return type; | |
1363 | } | |
1364 | ||
1365 | const struct export_operations udf_export_ops = { | |
1366 | .encode_fh = udf_encode_fh, | |
1367 | .fh_to_dentry = udf_fh_to_dentry, | |
1368 | .fh_to_parent = udf_fh_to_parent, | |
1369 | .get_parent = udf_get_parent, | |
1370 | }; | |
1371 | ||
c5ef1c42 | 1372 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1373 | .lookup = udf_lookup, |
1374 | .create = udf_create, | |
1375 | .link = udf_link, | |
1376 | .unlink = udf_unlink, | |
1377 | .symlink = udf_symlink, | |
1378 | .mkdir = udf_mkdir, | |
1379 | .rmdir = udf_rmdir, | |
1380 | .mknod = udf_mknod, | |
1381 | .rename = udf_rename, | |
1da177e4 | 1382 | }; |