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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * namei.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998-2004 Ben Fennema | |
14 | * (C) 1999-2000 Stelias Computing Inc | |
15 | * | |
16 | * HISTORY | |
17 | * | |
18 | * 12/12/98 blf Created. Split out the lookup code from dir.c | |
19 | * 04/19/99 blf link, mknod, symlink support | |
20 | */ | |
21 | ||
22 | #include "udfdecl.h" | |
23 | ||
24 | #include "udf_i.h" | |
25 | #include "udf_sb.h" | |
26 | #include <linux/string.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/quotaops.h> | |
31 | #include <linux/smp_lock.h> | |
32 | #include <linux/buffer_head.h> | |
e8edc6e0 | 33 | #include <linux/sched.h> |
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 | 144 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
9fbb76ce | 145 | struct qstr *child, |
cb00ea35 CG |
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); |
9fbb76ce AV |
162 | int isdotdot = child->len == 2 && |
163 | child->name[0] == '.' && child->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 | 240 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
9fbb76ce | 241 | if (flen && udf_match(flen, fname, child->len, child->name)) |
b80697c1 | 242 | goto out_ok; |
1da177e4 | 243 | } |
28de7948 | 244 | |
b80697c1 JK |
245 | out_err: |
246 | fi = NULL; | |
1da177e4 | 247 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
248 | brelse(fibh->ebh); |
249 | brelse(fibh->sbh); | |
b80697c1 | 250 | out_ok: |
3bf25cb4 | 251 | brelse(epos.bh); |
b80697c1 | 252 | kfree(fname); |
28de7948 | 253 | |
b80697c1 | 254 | return fi; |
1da177e4 LT |
255 | } |
256 | ||
cb00ea35 CG |
257 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
258 | struct nameidata *nd) | |
1da177e4 LT |
259 | { |
260 | struct inode *inode = NULL; | |
db9a369e | 261 | struct fileIdentDesc cfi; |
1da177e4 LT |
262 | struct udf_fileident_bh fibh; |
263 | ||
cb00ea35 | 264 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
265 | return ERR_PTR(-ENAMETOOLONG); |
266 | ||
267 | lock_kernel(); | |
268 | #ifdef UDF_RECOVERY | |
269 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 270 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
28de7948 CG |
271 | kernel_lb_addr lb = { |
272 | .logicalBlockNum = 0, | |
4b11111a MS |
273 | .partitionReferenceNum = |
274 | simple_strtoul(dentry->d_name.name + 3, | |
275 | NULL, 0), | |
28de7948 | 276 | }; |
1da177e4 | 277 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 278 | if (!inode) { |
1da177e4 LT |
279 | unlock_kernel(); |
280 | return ERR_PTR(-EACCES); | |
281 | } | |
4b11111a | 282 | } else |
28de7948 | 283 | #endif /* UDF_RECOVERY */ |
1da177e4 | 284 | |
9fbb76ce | 285 | if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { |
1da177e4 | 286 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
287 | brelse(fibh.ebh); |
288 | brelse(fibh.sbh); | |
1da177e4 LT |
289 | |
290 | inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); | |
cb00ea35 | 291 | if (!inode) { |
1da177e4 LT |
292 | unlock_kernel(); |
293 | return ERR_PTR(-EACCES); | |
294 | } | |
295 | } | |
296 | unlock_kernel(); | |
28de7948 | 297 | |
221e583a | 298 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
299 | } |
300 | ||
cb00ea35 CG |
301 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
302 | struct dentry *dentry, | |
303 | struct udf_fileident_bh *fibh, | |
304 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 305 | { |
6c79e987 | 306 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 307 | struct fileIdentDesc *fi = NULL; |
b80697c1 | 308 | char *name = NULL; |
1da177e4 LT |
309 | int namelen; |
310 | loff_t f_pos; | |
af793295 | 311 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
312 | int nfidlen; |
313 | uint8_t lfi; | |
314 | uint16_t liu; | |
315 | int block; | |
ff116fc8 | 316 | kernel_lb_addr eloc; |
9afadc4b | 317 | uint32_t elen = 0; |
60448b1d | 318 | sector_t offset; |
28de7948 | 319 | struct extent_position epos = {}; |
48d6d8ff | 320 | struct udf_inode_info *dinfo; |
1da177e4 | 321 | |
b80697c1 JK |
322 | fibh->sbh = fibh->ebh = NULL; |
323 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); | |
324 | if (!name) { | |
325 | *err = -ENOMEM; | |
326 | goto out_err; | |
327 | } | |
328 | ||
cb00ea35 CG |
329 | if (dentry) { |
330 | if (!dentry->d_name.len) { | |
1da177e4 | 331 | *err = -EINVAL; |
b80697c1 | 332 | goto out_err; |
1da177e4 | 333 | } |
4b11111a MS |
334 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
335 | dentry->d_name.len); | |
336 | if (!namelen) { | |
1da177e4 | 337 | *err = -ENAMETOOLONG; |
b80697c1 | 338 | goto out_err; |
1da177e4 | 339 | } |
28de7948 | 340 | } else { |
1da177e4 | 341 | namelen = 0; |
28de7948 | 342 | } |
1da177e4 LT |
343 | |
344 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
345 | ||
af793295 | 346 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 347 | |
af793295 | 348 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 349 | dinfo = UDF_I(dir); |
b80697c1 JK |
350 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
351 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
352 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { | |
353 | block = udf_get_lb_pblock(dir->i_sb, | |
354 | dinfo->i_location, 0); | |
355 | fibh->soffset = fibh->eoffset = sb->s_blocksize; | |
356 | goto add; | |
357 | } | |
1da177e4 | 358 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 359 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 360 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 361 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 362 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 363 | epos.offset -= sizeof(long_ad); |
4b11111a | 364 | } else |
1da177e4 LT |
365 | offset = 0; |
366 | ||
4b11111a MS |
367 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
368 | if (!fibh->sbh) { | |
1da177e4 | 369 | *err = -EIO; |
b80697c1 | 370 | goto out_err; |
1da177e4 LT |
371 | } |
372 | ||
48d6d8ff | 373 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 LT |
374 | } |
375 | ||
af793295 | 376 | while (f_pos < size) { |
cb00ea35 CG |
377 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
378 | &elen, &offset); | |
1da177e4 | 379 | |
cb00ea35 | 380 | if (!fi) { |
1da177e4 | 381 | *err = -EIO; |
b80697c1 | 382 | goto out_err; |
1da177e4 LT |
383 | } |
384 | ||
385 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
386 | lfi = cfi->lengthFileIdent; | |
387 | ||
cb00ea35 | 388 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
389 | if (((sizeof(struct fileIdentDesc) + |
390 | liu + lfi + 3) & ~3) == nfidlen) { | |
1da177e4 LT |
391 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
392 | cfi->fileVersionNum = cpu_to_le16(1); | |
393 | cfi->fileCharacteristics = 0; | |
394 | cfi->lengthFileIdent = namelen; | |
395 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
396 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
397 | name)) | |
b80697c1 | 398 | goto out_ok; |
4b11111a | 399 | else { |
1da177e4 | 400 | *err = -EIO; |
b80697c1 | 401 | goto out_err; |
1da177e4 LT |
402 | } |
403 | } | |
404 | } | |
1da177e4 LT |
405 | } |
406 | ||
28de7948 | 407 | add: |
9afadc4b JK |
408 | /* Is there any extent whose size we need to round up? */ |
409 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && elen) { | |
05343c4f JK |
410 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); |
411 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
412 | epos.offset -= sizeof(short_ad); | |
413 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
414 | epos.offset -= sizeof(long_ad); | |
415 | udf_write_aext(dir, &epos, eloc, elen, 1); | |
416 | } | |
1da177e4 LT |
417 | f_pos += nfidlen; |
418 | ||
48d6d8ff | 419 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 420 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 421 | brelse(epos.bh); |
ff116fc8 | 422 | epos.bh = NULL; |
1da177e4 LT |
423 | fibh->soffset -= udf_ext0_offset(dir); |
424 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 425 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 426 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
427 | brelse(fibh->ebh); |
428 | brelse(fibh->sbh); | |
4b11111a MS |
429 | fibh->sbh = fibh->ebh = |
430 | udf_expand_dir_adinicb(dir, &block, err); | |
431 | if (!fibh->sbh) | |
b80697c1 | 432 | goto out_err; |
48d6d8ff | 433 | epos.block = dinfo->i_location; |
ff116fc8 | 434 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
435 | /* Load extent udf_expand_dir_adinicb() has created */ |
436 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
437 | } |
438 | ||
cb00ea35 | 439 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
440 | fibh->soffset = fibh->eoffset; |
441 | fibh->eoffset += nfidlen; | |
cb00ea35 | 442 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 443 | brelse(fibh->sbh); |
1da177e4 LT |
444 | fibh->sbh = fibh->ebh; |
445 | } | |
446 | ||
48d6d8ff MS |
447 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
448 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 449 | fi = (struct fileIdentDesc *) |
48d6d8ff | 450 | (dinfo->i_ext.i_data + |
c0b34438 | 451 | fibh->soffset - |
4b11111a | 452 | udf_ext0_offset(dir) + |
48d6d8ff | 453 | dinfo->i_lenEAttr); |
cb00ea35 | 454 | } else { |
4b11111a MS |
455 | block = eloc.logicalBlockNum + |
456 | ((elen - 1) >> | |
457 | dir->i_sb->s_blocksize_bits); | |
458 | fi = (struct fileIdentDesc *) | |
459 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 460 | } |
cb00ea35 | 461 | } else { |
1da177e4 LT |
462 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
463 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 464 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 465 | brelse(fibh->sbh); |
1da177e4 LT |
466 | fibh->sbh = fibh->ebh; |
467 | } | |
468 | ||
469 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 470 | dir->i_sb->s_blocksize_bits); |
4b11111a | 471 | fibh->ebh = udf_bread(dir, |
af793295 | 472 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
473 | if (!fibh->ebh) |
474 | goto out_err; | |
1da177e4 | 475 | |
28de7948 | 476 | if (!fibh->soffset) { |
ff116fc8 | 477 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 478 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 479 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 | 480 | dir->i_sb->s_blocksize_bits); |
4b11111a | 481 | } else |
cb00ea35 | 482 | block++; |
1da177e4 | 483 | |
3bf25cb4 | 484 | brelse(fibh->sbh); |
1da177e4 LT |
485 | fibh->sbh = fibh->ebh; |
486 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 487 | } else { |
1da177e4 | 488 | fi = (struct fileIdentDesc *) |
4b11111a MS |
489 | (fibh->sbh->b_data + sb->s_blocksize + |
490 | fibh->soffset); | |
1da177e4 LT |
491 | } |
492 | } | |
493 | ||
494 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 495 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a MS |
496 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
497 | sizeof(tag)); | |
1da177e4 | 498 | else |
4b11111a MS |
499 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
500 | sizeof(tag)); | |
1da177e4 LT |
501 | cfi->fileVersionNum = cpu_to_le16(1); |
502 | cfi->lengthFileIdent = namelen; | |
503 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 504 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 505 | dir->i_size += nfidlen; |
48d6d8ff MS |
506 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
507 | dinfo->i_lenAlloc += nfidlen; | |
1da177e4 | 508 | mark_inode_dirty(dir); |
b80697c1 | 509 | goto out_ok; |
cb00ea35 | 510 | } else { |
1da177e4 | 511 | *err = -EIO; |
b80697c1 | 512 | goto out_err; |
1da177e4 | 513 | } |
b80697c1 JK |
514 | |
515 | out_err: | |
516 | fi = NULL; | |
517 | if (fibh->sbh != fibh->ebh) | |
518 | brelse(fibh->ebh); | |
519 | brelse(fibh->sbh); | |
520 | out_ok: | |
521 | brelse(epos.bh); | |
522 | kfree(name); | |
523 | return fi; | |
1da177e4 LT |
524 | } |
525 | ||
526 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
527 | struct udf_fileident_bh *fibh, |
528 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
529 | { |
530 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 531 | |
1da177e4 LT |
532 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
533 | memset(&(cfi->icb), 0x00, sizeof(long_ad)); | |
28de7948 | 534 | |
1da177e4 LT |
535 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
536 | } | |
537 | ||
cb00ea35 CG |
538 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
539 | struct nameidata *nd) | |
1da177e4 LT |
540 | { |
541 | struct udf_fileident_bh fibh; | |
542 | struct inode *inode; | |
543 | struct fileIdentDesc cfi, *fi; | |
544 | int err; | |
48d6d8ff | 545 | struct udf_inode_info *iinfo; |
1da177e4 LT |
546 | |
547 | lock_kernel(); | |
548 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 549 | if (!inode) { |
1da177e4 LT |
550 | unlock_kernel(); |
551 | return err; | |
552 | } | |
553 | ||
48d6d8ff MS |
554 | iinfo = UDF_I(inode); |
555 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
556 | inode->i_data.a_ops = &udf_adinicb_aops; |
557 | else | |
558 | inode->i_data.a_ops = &udf_aops; | |
559 | inode->i_op = &udf_file_inode_operations; | |
560 | inode->i_fop = &udf_file_operations; | |
561 | inode->i_mode = mode; | |
562 | mark_inode_dirty(inode); | |
563 | ||
4b11111a MS |
564 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
565 | if (!fi) { | |
cb00ea35 | 566 | inode->i_nlink--; |
1da177e4 LT |
567 | mark_inode_dirty(inode); |
568 | iput(inode); | |
569 | unlock_kernel(); | |
570 | return err; | |
571 | } | |
572 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 573 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 574 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 575 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 576 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 577 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 578 | mark_inode_dirty(dir); |
1da177e4 | 579 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
580 | brelse(fibh.ebh); |
581 | brelse(fibh.sbh); | |
1da177e4 LT |
582 | unlock_kernel(); |
583 | d_instantiate(dentry, inode); | |
28de7948 | 584 | |
1da177e4 LT |
585 | return 0; |
586 | } | |
587 | ||
cb00ea35 CG |
588 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
589 | dev_t rdev) | |
1da177e4 | 590 | { |
cb00ea35 | 591 | struct inode *inode; |
1da177e4 LT |
592 | struct udf_fileident_bh fibh; |
593 | struct fileIdentDesc cfi, *fi; | |
594 | int err; | |
48d6d8ff | 595 | struct udf_inode_info *iinfo; |
1da177e4 LT |
596 | |
597 | if (!old_valid_dev(rdev)) | |
598 | return -EINVAL; | |
599 | ||
600 | lock_kernel(); | |
601 | err = -EIO; | |
602 | inode = udf_new_inode(dir, mode, &err); | |
603 | if (!inode) | |
604 | goto out; | |
605 | ||
48d6d8ff | 606 | iinfo = UDF_I(inode); |
7706bb39 | 607 | inode->i_uid = current_fsuid(); |
1da177e4 | 608 | init_special_inode(inode, mode, rdev); |
4b11111a MS |
609 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
610 | if (!fi) { | |
cb00ea35 | 611 | inode->i_nlink--; |
1da177e4 LT |
612 | mark_inode_dirty(inode); |
613 | iput(inode); | |
614 | unlock_kernel(); | |
615 | return err; | |
616 | } | |
617 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 618 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 619 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 620 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 621 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 622 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 623 | mark_inode_dirty(dir); |
1da177e4 LT |
624 | mark_inode_dirty(inode); |
625 | ||
626 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
627 | brelse(fibh.ebh); |
628 | brelse(fibh.sbh); | |
1da177e4 LT |
629 | d_instantiate(dentry, inode); |
630 | err = 0; | |
28de7948 CG |
631 | |
632 | out: | |
1da177e4 LT |
633 | unlock_kernel(); |
634 | return err; | |
635 | } | |
636 | ||
cb00ea35 | 637 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 638 | { |
cb00ea35 | 639 | struct inode *inode; |
1da177e4 LT |
640 | struct udf_fileident_bh fibh; |
641 | struct fileIdentDesc cfi, *fi; | |
642 | int err; | |
48d6d8ff MS |
643 | struct udf_inode_info *dinfo = UDF_I(dir); |
644 | struct udf_inode_info *iinfo; | |
1da177e4 LT |
645 | |
646 | lock_kernel(); | |
647 | err = -EMLINK; | |
cb00ea35 | 648 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
649 | goto out; |
650 | ||
651 | err = -EIO; | |
652 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
653 | if (!inode) | |
654 | goto out; | |
655 | ||
48d6d8ff | 656 | iinfo = UDF_I(inode); |
1da177e4 LT |
657 | inode->i_op = &udf_dir_inode_operations; |
658 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
659 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
660 | if (!fi) { | |
1da177e4 LT |
661 | inode->i_nlink--; |
662 | mark_inode_dirty(inode); | |
663 | iput(inode); | |
664 | goto out; | |
665 | } | |
666 | inode->i_nlink = 2; | |
667 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 668 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 669 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 670 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
671 | cfi.fileCharacteristics = |
672 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 673 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 674 | brelse(fibh.sbh); |
1da177e4 LT |
675 | inode->i_mode = S_IFDIR | mode; |
676 | if (dir->i_mode & S_ISGID) | |
677 | inode->i_mode |= S_ISGID; | |
678 | mark_inode_dirty(inode); | |
679 | ||
4b11111a MS |
680 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
681 | if (!fi) { | |
1da177e4 LT |
682 | inode->i_nlink = 0; |
683 | mark_inode_dirty(inode); | |
684 | iput(inode); | |
685 | goto out; | |
686 | } | |
687 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 688 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 689 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 690 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
691 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
692 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 693 | inc_nlink(dir); |
1da177e4 LT |
694 | mark_inode_dirty(dir); |
695 | d_instantiate(dentry, inode); | |
696 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
697 | brelse(fibh.ebh); |
698 | brelse(fibh.sbh); | |
1da177e4 | 699 | err = 0; |
28de7948 CG |
700 | |
701 | out: | |
1da177e4 LT |
702 | unlock_kernel(); |
703 | return err; | |
704 | } | |
705 | ||
706 | static int empty_dir(struct inode *dir) | |
707 | { | |
708 | struct fileIdentDesc *fi, cfi; | |
709 | struct udf_fileident_bh fibh; | |
710 | loff_t f_pos; | |
af793295 | 711 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 712 | int block; |
ff116fc8 JK |
713 | kernel_lb_addr eloc; |
714 | uint32_t elen; | |
60448b1d | 715 | sector_t offset; |
28de7948 | 716 | struct extent_position epos = {}; |
48d6d8ff | 717 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 718 | |
af793295 JK |
719 | f_pos = udf_ext0_offset(dir); |
720 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 721 | |
48d6d8ff | 722 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 723 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 724 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
725 | &epos, &eloc, &elen, &offset) == |
726 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 727 | block = udf_get_lb_pblock(dir->i_sb, eloc, offset); |
cb00ea35 | 728 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 729 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
ff116fc8 | 730 | epos.offset -= sizeof(short_ad); |
48d6d8ff | 731 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
ff116fc8 | 732 | epos.offset -= sizeof(long_ad); |
4b11111a | 733 | } else |
1da177e4 LT |
734 | offset = 0; |
735 | ||
4b11111a MS |
736 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
737 | if (!fibh.sbh) { | |
3bf25cb4 | 738 | brelse(epos.bh); |
1da177e4 LT |
739 | return 0; |
740 | } | |
cb00ea35 | 741 | } else { |
3bf25cb4 | 742 | brelse(epos.bh); |
1da177e4 LT |
743 | return 0; |
744 | } | |
745 | ||
af793295 | 746 | while (f_pos < size) { |
cb00ea35 CG |
747 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
748 | &elen, &offset); | |
cb00ea35 | 749 | if (!fi) { |
1da177e4 | 750 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
751 | brelse(fibh.ebh); |
752 | brelse(fibh.sbh); | |
753 | brelse(epos.bh); | |
1da177e4 LT |
754 | return 0; |
755 | } | |
756 | ||
28de7948 CG |
757 | if (cfi.lengthFileIdent && |
758 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 759 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
760 | brelse(fibh.ebh); |
761 | brelse(fibh.sbh); | |
762 | brelse(epos.bh); | |
1da177e4 LT |
763 | return 0; |
764 | } | |
765 | } | |
28de7948 | 766 | |
1da177e4 | 767 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
768 | brelse(fibh.ebh); |
769 | brelse(fibh.sbh); | |
770 | brelse(epos.bh); | |
28de7948 | 771 | |
1da177e4 LT |
772 | return 1; |
773 | } | |
774 | ||
cb00ea35 | 775 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
776 | { |
777 | int retval; | |
cb00ea35 | 778 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
779 | struct udf_fileident_bh fibh; |
780 | struct fileIdentDesc *fi, cfi; | |
781 | kernel_lb_addr tloc; | |
782 | ||
783 | retval = -ENOENT; | |
784 | lock_kernel(); | |
9fbb76ce | 785 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
786 | if (!fi) |
787 | goto out; | |
788 | ||
789 | retval = -EIO; | |
790 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
791 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
792 | goto end_rmdir; | |
793 | retval = -ENOTEMPTY; | |
794 | if (!empty_dir(inode)) | |
795 | goto end_rmdir; | |
796 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
797 | if (retval) | |
798 | goto end_rmdir; | |
799 | if (inode->i_nlink != 2) | |
800 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
801 | "empty directory has nlink != 2 (%d)", |
802 | inode->i_nlink); | |
ce71ec36 | 803 | clear_nlink(inode); |
1da177e4 | 804 | inode->i_size = 0; |
c007c06e | 805 | inode_dec_link_count(dir); |
4b11111a MS |
806 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
807 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
808 | mark_inode_dirty(dir); |
809 | ||
28de7948 | 810 | end_rmdir: |
1da177e4 | 811 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
812 | brelse(fibh.ebh); |
813 | brelse(fibh.sbh); | |
28de7948 CG |
814 | |
815 | out: | |
1da177e4 LT |
816 | unlock_kernel(); |
817 | return retval; | |
818 | } | |
819 | ||
cb00ea35 | 820 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
821 | { |
822 | int retval; | |
cb00ea35 | 823 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
824 | struct udf_fileident_bh fibh; |
825 | struct fileIdentDesc *fi; | |
826 | struct fileIdentDesc cfi; | |
827 | kernel_lb_addr tloc; | |
828 | ||
829 | retval = -ENOENT; | |
830 | lock_kernel(); | |
9fbb76ce | 831 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
832 | if (!fi) |
833 | goto out; | |
834 | ||
835 | retval = -EIO; | |
836 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
837 | if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) | |
838 | goto end_unlink; | |
839 | ||
cb00ea35 | 840 | if (!inode->i_nlink) { |
1da177e4 | 841 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 842 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
843 | inode->i_nlink = 1; |
844 | } | |
845 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
846 | if (retval) | |
847 | goto end_unlink; | |
848 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
849 | mark_inode_dirty(dir); | |
9a53c3a7 | 850 | inode_dec_link_count(inode); |
1da177e4 LT |
851 | inode->i_ctime = dir->i_ctime; |
852 | retval = 0; | |
853 | ||
28de7948 | 854 | end_unlink: |
1da177e4 | 855 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
856 | brelse(fibh.ebh); |
857 | brelse(fibh.sbh); | |
28de7948 CG |
858 | |
859 | out: | |
1da177e4 LT |
860 | unlock_kernel(); |
861 | return retval; | |
862 | } | |
863 | ||
cb00ea35 CG |
864 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
865 | const char *symname) | |
1da177e4 | 866 | { |
cb00ea35 | 867 | struct inode *inode; |
1da177e4 LT |
868 | struct pathComponent *pc; |
869 | char *compstart; | |
870 | struct udf_fileident_bh fibh; | |
28de7948 | 871 | struct extent_position epos = {}; |
1da177e4 LT |
872 | int eoffset, elen = 0; |
873 | struct fileIdentDesc *fi; | |
874 | struct fileIdentDesc cfi; | |
875 | char *ea; | |
876 | int err; | |
877 | int block; | |
b80697c1 | 878 | char *name = NULL; |
1da177e4 | 879 | int namelen; |
6c79e987 | 880 | struct buffer_head *bh; |
48d6d8ff | 881 | struct udf_inode_info *iinfo; |
1da177e4 LT |
882 | |
883 | lock_kernel(); | |
4b11111a MS |
884 | inode = udf_new_inode(dir, S_IFLNK, &err); |
885 | if (!inode) | |
1da177e4 LT |
886 | goto out; |
887 | ||
b80697c1 JK |
888 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
889 | if (!name) { | |
890 | err = -ENOMEM; | |
891 | goto out_no_entry; | |
892 | } | |
893 | ||
48d6d8ff | 894 | iinfo = UDF_I(inode); |
1da177e4 LT |
895 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
896 | inode->i_data.a_ops = &udf_symlink_aops; | |
897 | inode->i_op = &page_symlink_inode_operations; | |
898 | ||
48d6d8ff | 899 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
ff116fc8 | 900 | kernel_lb_addr eloc; |
78e917d5 | 901 | uint32_t bsize; |
1da177e4 LT |
902 | |
903 | block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
904 | iinfo->i_location.partitionReferenceNum, |
905 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
906 | if (!block) |
907 | goto out_no_entry; | |
48d6d8ff | 908 | epos.block = iinfo->i_location; |
ff116fc8 JK |
909 | epos.offset = udf_file_entry_alloc_offset(inode); |
910 | epos.bh = NULL; | |
1da177e4 | 911 | eloc.logicalBlockNum = block; |
4b11111a | 912 | eloc.partitionReferenceNum = |
48d6d8ff | 913 | iinfo->i_location.partitionReferenceNum; |
78e917d5 HH |
914 | bsize = inode->i_sb->s_blocksize; |
915 | iinfo->i_lenExtents = bsize; | |
916 | udf_add_aext(inode, &epos, eloc, bsize, 0); | |
3bf25cb4 | 917 | brelse(epos.bh); |
1da177e4 LT |
918 | |
919 | block = udf_get_pblock(inode->i_sb, block, | |
48d6d8ff | 920 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 921 | 0); |
ff116fc8 JK |
922 | epos.bh = udf_tread(inode->i_sb, block); |
923 | lock_buffer(epos.bh); | |
924 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
925 | set_buffer_uptodate(epos.bh); | |
926 | unlock_buffer(epos.bh); | |
927 | mark_buffer_dirty_inode(epos.bh, inode); | |
928 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
929 | } else |
930 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 LT |
931 | |
932 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
933 | pc = (struct pathComponent *)ea; | |
934 | ||
cb00ea35 CG |
935 | if (*symname == '/') { |
936 | do { | |
1da177e4 LT |
937 | symname++; |
938 | } while (*symname == '/'); | |
939 | ||
940 | pc->componentType = 1; | |
941 | pc->lengthComponentIdent = 0; | |
942 | pc->componentFileVersionNum = 0; | |
943 | pc += sizeof(struct pathComponent); | |
944 | elen += sizeof(struct pathComponent); | |
945 | } | |
946 | ||
947 | err = -ENAMETOOLONG; | |
948 | ||
cb00ea35 | 949 | while (*symname) { |
1da177e4 LT |
950 | if (elen + sizeof(struct pathComponent) > eoffset) |
951 | goto out_no_entry; | |
952 | ||
953 | pc = (struct pathComponent *)(ea + elen); | |
954 | ||
955 | compstart = (char *)symname; | |
956 | ||
cb00ea35 | 957 | do { |
1da177e4 LT |
958 | symname++; |
959 | } while (*symname && *symname != '/'); | |
960 | ||
961 | pc->componentType = 5; | |
962 | pc->lengthComponentIdent = 0; | |
963 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
964 | if (compstart[0] == '.') { |
965 | if ((symname - compstart) == 1) | |
1da177e4 | 966 | pc->componentType = 4; |
4b11111a MS |
967 | else if ((symname - compstart) == 2 && |
968 | compstart[1] == '.') | |
1da177e4 LT |
969 | pc->componentType = 3; |
970 | } | |
971 | ||
cb00ea35 | 972 | if (pc->componentType == 5) { |
28de7948 CG |
973 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
974 | symname - compstart); | |
975 | if (!namelen) | |
1da177e4 LT |
976 | goto out_no_entry; |
977 | ||
4b11111a MS |
978 | if (elen + sizeof(struct pathComponent) + namelen > |
979 | eoffset) | |
1da177e4 LT |
980 | goto out_no_entry; |
981 | else | |
982 | pc->lengthComponentIdent = namelen; | |
983 | ||
984 | memcpy(pc->componentIdent, name, namelen); | |
985 | } | |
986 | ||
987 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
988 | ||
cb00ea35 CG |
989 | if (*symname) { |
990 | do { | |
1da177e4 LT |
991 | symname++; |
992 | } while (*symname == '/'); | |
993 | } | |
994 | } | |
995 | ||
3bf25cb4 | 996 | brelse(epos.bh); |
1da177e4 | 997 | inode->i_size = elen; |
48d6d8ff MS |
998 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
999 | iinfo->i_lenAlloc = inode->i_size; | |
1da177e4 LT |
1000 | mark_inode_dirty(inode); |
1001 | ||
4b11111a MS |
1002 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1003 | if (!fi) | |
1da177e4 LT |
1004 | goto out_no_entry; |
1005 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 1006 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
6c79e987 MS |
1007 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1008 | if (bh) { | |
4b11111a MS |
1009 | struct logicalVolIntegrityDesc *lvid = |
1010 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1011 | struct logicalVolHeaderDesc *lvhd; |
1012 | uint64_t uniqueID; | |
4b11111a MS |
1013 | lvhd = (struct logicalVolHeaderDesc *) |
1014 | lvid->logicalVolContentsUse; | |
1da177e4 | 1015 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1016 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1017 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1018 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1019 | uniqueID += 16; | |
1020 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1021 | mark_buffer_dirty(bh); |
1da177e4 LT |
1022 | } |
1023 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1024 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1025 | mark_inode_dirty(dir); |
1da177e4 | 1026 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1027 | brelse(fibh.ebh); |
1028 | brelse(fibh.sbh); | |
1da177e4 LT |
1029 | d_instantiate(dentry, inode); |
1030 | err = 0; | |
1031 | ||
28de7948 | 1032 | out: |
b80697c1 | 1033 | kfree(name); |
1da177e4 LT |
1034 | unlock_kernel(); |
1035 | return err; | |
1036 | ||
28de7948 | 1037 | out_no_entry: |
9a53c3a7 | 1038 | inode_dec_link_count(inode); |
1da177e4 LT |
1039 | iput(inode); |
1040 | goto out; | |
1041 | } | |
1042 | ||
cb00ea35 CG |
1043 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1044 | struct dentry *dentry) | |
1da177e4 LT |
1045 | { |
1046 | struct inode *inode = old_dentry->d_inode; | |
1047 | struct udf_fileident_bh fibh; | |
1048 | struct fileIdentDesc cfi, *fi; | |
1049 | int err; | |
6c79e987 | 1050 | struct buffer_head *bh; |
1da177e4 LT |
1051 | |
1052 | lock_kernel(); | |
cb00ea35 | 1053 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1054 | unlock_kernel(); |
1055 | return -EMLINK; | |
1056 | } | |
1057 | ||
4b11111a MS |
1058 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1059 | if (!fi) { | |
1da177e4 LT |
1060 | unlock_kernel(); |
1061 | return err; | |
1062 | } | |
1063 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1064 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1065 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1066 | if (bh) { | |
4b11111a MS |
1067 | struct logicalVolIntegrityDesc *lvid = |
1068 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1069 | struct logicalVolHeaderDesc *lvhd; |
1070 | uint64_t uniqueID; | |
4b11111a MS |
1071 | lvhd = (struct logicalVolHeaderDesc *) |
1072 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1073 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1074 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1075 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1076 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1077 | uniqueID += 16; | |
1078 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1079 | mark_buffer_dirty(bh); |
1da177e4 LT |
1080 | } |
1081 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1082 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1083 | mark_inode_dirty(dir); |
28de7948 | 1084 | |
1da177e4 | 1085 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1086 | brelse(fibh.ebh); |
1087 | brelse(fibh.sbh); | |
d8c76e6f | 1088 | inc_nlink(inode); |
1da177e4 LT |
1089 | inode->i_ctime = current_fs_time(inode->i_sb); |
1090 | mark_inode_dirty(inode); | |
1091 | atomic_inc(&inode->i_count); | |
1092 | d_instantiate(dentry, inode); | |
1093 | unlock_kernel(); | |
28de7948 | 1094 | |
1da177e4 LT |
1095 | return 0; |
1096 | } | |
1097 | ||
1098 | /* Anybody can rename anything with this: the permission checks are left to the | |
1099 | * higher-level routines. | |
1100 | */ | |
cb00ea35 CG |
1101 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1102 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1103 | { |
cb00ea35 CG |
1104 | struct inode *old_inode = old_dentry->d_inode; |
1105 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1106 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1107 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1108 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1109 | struct buffer_head *dir_bh = NULL; |
1110 | int retval = -ENOENT; | |
1111 | kernel_lb_addr tloc; | |
48d6d8ff | 1112 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 LT |
1113 | |
1114 | lock_kernel(); | |
9fbb76ce | 1115 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
4b11111a | 1116 | if (ofi) { |
1da177e4 | 1117 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1118 | brelse(ofibh.ebh); |
1119 | brelse(ofibh.sbh); | |
1da177e4 LT |
1120 | } |
1121 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
1122 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) | |
cb00ea35 | 1123 | != old_inode->i_ino) |
1da177e4 LT |
1124 | goto end_rename; |
1125 | ||
9fbb76ce | 1126 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
cb00ea35 CG |
1127 | if (nfi) { |
1128 | if (!new_inode) { | |
1da177e4 | 1129 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1130 | brelse(nfibh.ebh); |
1131 | brelse(nfibh.sbh); | |
1da177e4 LT |
1132 | nfi = NULL; |
1133 | } | |
1134 | } | |
cb00ea35 | 1135 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1136 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1137 | |
cb00ea35 | 1138 | if (new_inode) { |
1da177e4 LT |
1139 | retval = -ENOTEMPTY; |
1140 | if (!empty_dir(new_inode)) | |
1141 | goto end_rename; | |
1142 | } | |
1143 | retval = -EIO; | |
48d6d8ff | 1144 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1145 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1146 | old_iinfo->i_ext.i_data - |
1147 | (old_iinfo->i_efe ? | |
4b11111a MS |
1148 | sizeof(struct extendedFileEntry) : |
1149 | sizeof(struct fileEntry)), | |
1150 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1151 | } else { |
1da177e4 LT |
1152 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1153 | if (!dir_bh) | |
1154 | goto end_rename; | |
4b11111a MS |
1155 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1156 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1157 | } |
1158 | if (!dir_fi) | |
1159 | goto end_rename; | |
1160 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
4b11111a MS |
1161 | if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != |
1162 | old_dir->i_ino) | |
1da177e4 LT |
1163 | goto end_rename; |
1164 | ||
1165 | retval = -EMLINK; | |
4b11111a MS |
1166 | if (!new_inode && |
1167 | new_dir->i_nlink >= | |
1168 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1169 | goto end_rename; |
1170 | } | |
cb00ea35 | 1171 | if (!nfi) { |
4b11111a MS |
1172 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1173 | &retval); | |
1da177e4 LT |
1174 | if (!nfi) |
1175 | goto end_rename; | |
1176 | } | |
1177 | ||
1178 | /* | |
1179 | * Like most other Unix systems, set the ctime for inodes on a | |
1180 | * rename. | |
1181 | */ | |
1182 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1183 | mark_inode_dirty(old_inode); | |
1184 | ||
1185 | /* | |
1186 | * ok, that's it | |
1187 | */ | |
1188 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1189 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
1190 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); | |
1191 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); | |
1192 | ||
1193 | /* The old fid may have moved - find it again */ | |
9fbb76ce | 1194 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
1da177e4 LT |
1195 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
1196 | ||
cb00ea35 | 1197 | if (new_inode) { |
1da177e4 | 1198 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1199 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1200 | } |
1201 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1202 | mark_inode_dirty(old_dir); | |
1203 | ||
cb00ea35 | 1204 | if (dir_fi) { |
c0b34438 | 1205 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1206 | udf_update_tag((char *)dir_fi, |
1207 | (sizeof(struct fileIdentDesc) + | |
1208 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1209 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1210 | mark_inode_dirty(old_inode); |
4b11111a | 1211 | else |
1da177e4 | 1212 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1213 | |
9a53c3a7 | 1214 | inode_dec_link_count(old_dir); |
4b11111a | 1215 | if (new_inode) |
9a53c3a7 | 1216 | inode_dec_link_count(new_inode); |
4b11111a | 1217 | else { |
d8c76e6f | 1218 | inc_nlink(new_dir); |
1da177e4 LT |
1219 | mark_inode_dirty(new_dir); |
1220 | } | |
1221 | } | |
1222 | ||
cb00ea35 | 1223 | if (ofi) { |
1da177e4 | 1224 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1225 | brelse(ofibh.ebh); |
1226 | brelse(ofibh.sbh); | |
1da177e4 LT |
1227 | } |
1228 | ||
1229 | retval = 0; | |
1230 | ||
28de7948 | 1231 | end_rename: |
3bf25cb4 | 1232 | brelse(dir_bh); |
cb00ea35 | 1233 | if (nfi) { |
1da177e4 | 1234 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1235 | brelse(nfibh.ebh); |
1236 | brelse(nfibh.sbh); | |
1da177e4 LT |
1237 | } |
1238 | unlock_kernel(); | |
28de7948 | 1239 | |
1da177e4 LT |
1240 | return retval; |
1241 | } | |
1242 | ||
221e583a RR |
1243 | static struct dentry *udf_get_parent(struct dentry *child) |
1244 | { | |
221e583a | 1245 | struct inode *inode = NULL; |
9fbb76ce | 1246 | struct qstr dotdot = {.name = "..", .len = 2}; |
221e583a RR |
1247 | struct fileIdentDesc cfi; |
1248 | struct udf_fileident_bh fibh; | |
1249 | ||
221e583a RR |
1250 | lock_kernel(); |
1251 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) | |
1252 | goto out_unlock; | |
1253 | ||
1254 | if (fibh.sbh != fibh.ebh) | |
1255 | brelse(fibh.ebh); | |
1256 | brelse(fibh.sbh); | |
1257 | ||
1258 | inode = udf_iget(child->d_inode->i_sb, | |
1259 | lelb_to_cpu(cfi.icb.extLocation)); | |
1260 | if (!inode) | |
1261 | goto out_unlock; | |
1262 | unlock_kernel(); | |
1263 | ||
44003728 | 1264 | return d_obtain_alias(inode); |
221e583a RR |
1265 | out_unlock: |
1266 | unlock_kernel(); | |
1267 | return ERR_PTR(-EACCES); | |
1268 | } | |
1269 | ||
1270 | ||
1271 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1272 | u16 partref, __u32 generation) | |
1273 | { | |
1274 | struct inode *inode; | |
221e583a RR |
1275 | kernel_lb_addr loc; |
1276 | ||
1277 | if (block == 0) | |
1278 | return ERR_PTR(-ESTALE); | |
1279 | ||
1280 | loc.logicalBlockNum = block; | |
1281 | loc.partitionReferenceNum = partref; | |
1282 | inode = udf_iget(sb, loc); | |
1283 | ||
1284 | if (inode == NULL) | |
1285 | return ERR_PTR(-ENOMEM); | |
1286 | ||
1287 | if (generation && inode->i_generation != generation) { | |
1288 | iput(inode); | |
1289 | return ERR_PTR(-ESTALE); | |
1290 | } | |
44003728 | 1291 | return d_obtain_alias(inode); |
221e583a RR |
1292 | } |
1293 | ||
1294 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1295 | struct fid *fid, int fh_len, int fh_type) | |
1296 | { | |
1297 | if ((fh_len != 3 && fh_len != 5) || | |
1298 | (fh_type != FILEID_UDF_WITH_PARENT && | |
1299 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1300 | return NULL; | |
1301 | ||
1302 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1303 | fid->udf.generation); | |
1304 | } | |
1305 | ||
1306 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1307 | struct fid *fid, int fh_len, int fh_type) | |
1308 | { | |
1309 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) | |
1310 | return NULL; | |
1311 | ||
1312 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1313 | fid->udf.parent_partref, | |
1314 | fid->udf.parent_generation); | |
1315 | } | |
1316 | static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, | |
1317 | int connectable) | |
1318 | { | |
1319 | int len = *lenp; | |
1320 | struct inode *inode = de->d_inode; | |
1321 | kernel_lb_addr location = UDF_I(inode)->i_location; | |
1322 | struct fid *fid = (struct fid *)fh; | |
1323 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1324 | ||
1325 | if (len < 3 || (connectable && len < 5)) | |
1326 | return 255; | |
1327 | ||
1328 | *lenp = 3; | |
1329 | fid->udf.block = location.logicalBlockNum; | |
1330 | fid->udf.partref = location.partitionReferenceNum; | |
1331 | fid->udf.generation = inode->i_generation; | |
1332 | ||
1333 | if (connectable && !S_ISDIR(inode->i_mode)) { | |
1334 | spin_lock(&de->d_lock); | |
1335 | inode = de->d_parent->d_inode; | |
1336 | location = UDF_I(inode)->i_location; | |
1337 | fid->udf.parent_block = location.logicalBlockNum; | |
1338 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1339 | fid->udf.parent_generation = inode->i_generation; | |
1340 | spin_unlock(&de->d_lock); | |
1341 | *lenp = 5; | |
1342 | type = FILEID_UDF_WITH_PARENT; | |
1343 | } | |
1344 | ||
1345 | return type; | |
1346 | } | |
1347 | ||
1348 | const struct export_operations udf_export_ops = { | |
1349 | .encode_fh = udf_encode_fh, | |
1350 | .fh_to_dentry = udf_fh_to_dentry, | |
1351 | .fh_to_parent = udf_fh_to_parent, | |
1352 | .get_parent = udf_get_parent, | |
1353 | }; | |
1354 | ||
c5ef1c42 | 1355 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1356 | .lookup = udf_lookup, |
1357 | .create = udf_create, | |
1358 | .link = udf_link, | |
1359 | .unlink = udf_unlink, | |
1360 | .symlink = udf_symlink, | |
1361 | .mkdir = udf_mkdir, | |
1362 | .rmdir = udf_rmdir, | |
1363 | .mknod = udf_mknod, | |
1364 | .rename = udf_rename, | |
1da177e4 | 1365 | }; |