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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> | |
1da177e4 | 30 | #include <linux/buffer_head.h> |
e8edc6e0 | 31 | #include <linux/sched.h> |
f845fced | 32 | #include <linux/crc-itu-t.h> |
221e583a | 33 | #include <linux/exportfs.h> |
1da177e4 | 34 | |
391e8bbd AV |
35 | static inline int udf_match(int len1, const unsigned char *name1, int len2, |
36 | const unsigned char *name2) | |
1da177e4 LT |
37 | { |
38 | if (len1 != len2) | |
39 | return 0; | |
28de7948 | 40 | |
1da177e4 LT |
41 | return !memcmp(name1, name2, len1); |
42 | } | |
43 | ||
44 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 | 45 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
4b11111a | 46 | uint8_t *impuse, uint8_t *fileident) |
1da177e4 | 47 | { |
5ca4e4be | 48 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag); |
1da177e4 | 49 | uint16_t crc; |
1da177e4 LT |
50 | int offset; |
51 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
52 | uint8_t lfi = cfi->lengthFileIdent; | |
53 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
28de7948 | 54 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
55 | int adinicb = 0; |
56 | ||
c0b34438 | 57 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 LT |
58 | adinicb = 1; |
59 | ||
60 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
61 | ||
cb00ea35 | 62 | if (impuse) { |
28de7948 CG |
63 | if (adinicb || (offset + liu < 0)) { |
64 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
65 | } else if (offset >= 0) { | |
1da177e4 | 66 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
28de7948 CG |
67 | } else { |
68 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
4b11111a MS |
69 | memcpy(fibh->ebh->b_data, impuse - offset, |
70 | liu + offset); | |
1da177e4 LT |
71 | } |
72 | } | |
73 | ||
74 | offset += liu; | |
75 | ||
cb00ea35 | 76 | if (fileident) { |
28de7948 CG |
77 | if (adinicb || (offset + lfi < 0)) { |
78 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
79 | } else if (offset >= 0) { | |
1da177e4 | 80 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 81 | } else { |
4b11111a MS |
82 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
83 | -offset); | |
84 | memcpy(fibh->ebh->b_data, fileident - offset, | |
85 | lfi + offset); | |
1da177e4 LT |
86 | } |
87 | } | |
88 | ||
89 | offset += lfi; | |
90 | ||
28de7948 CG |
91 | if (adinicb || (offset + padlen < 0)) { |
92 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
93 | } else if (offset >= 0) { | |
1da177e4 | 94 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
95 | } else { |
96 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
97 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
98 | } | |
99 | ||
5ca4e4be PE |
100 | crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), |
101 | sizeof(struct fileIdentDesc) - sizeof(struct tag)); | |
28de7948 CG |
102 | |
103 | if (fibh->sbh == fibh->ebh) { | |
f845fced | 104 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
5ca4e4be | 105 | crclen + sizeof(struct tag) - |
f845fced | 106 | sizeof(struct fileIdentDesc)); |
28de7948 | 107 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
f845fced | 108 | crc = crc_itu_t(crc, fibh->ebh->b_data + |
4b11111a MS |
109 | sizeof(struct fileIdentDesc) + |
110 | fibh->soffset, | |
5ca4e4be | 111 | crclen + sizeof(struct tag) - |
f845fced | 112 | sizeof(struct fileIdentDesc)); |
28de7948 | 113 | } else { |
f845fced BC |
114 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
115 | -fibh->soffset - sizeof(struct fileIdentDesc)); | |
116 | crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); | |
1da177e4 LT |
117 | } |
118 | ||
119 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
120 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
3f2587bb | 121 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
1da177e4 | 122 | |
28de7948 | 123 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
4b11111a MS |
124 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
125 | sizeof(struct fileIdentDesc)); | |
28de7948 CG |
126 | } else { |
127 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
128 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 129 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
130 | } |
131 | ||
28de7948 | 132 | if (adinicb) { |
1da177e4 | 133 | mark_inode_dirty(inode); |
28de7948 | 134 | } else { |
1da177e4 LT |
135 | if (fibh->sbh != fibh->ebh) |
136 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
137 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
138 | } | |
139 | return 0; | |
140 | } | |
141 | ||
cb00ea35 | 142 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
391e8bbd | 143 | const struct qstr *child, |
cb00ea35 CG |
144 | struct udf_fileident_bh *fibh, |
145 | struct fileIdentDesc *cfi) | |
1da177e4 | 146 | { |
cb00ea35 | 147 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
148 | loff_t f_pos; |
149 | int block, flen; | |
391e8bbd AV |
150 | unsigned char *fname = NULL; |
151 | unsigned char *nameptr; | |
1da177e4 LT |
152 | uint8_t lfi; |
153 | uint16_t liu; | |
ec471dc4 | 154 | loff_t size; |
5ca4e4be | 155 | struct kernel_lb_addr eloc; |
ff116fc8 | 156 | uint32_t elen; |
60448b1d | 157 | sector_t offset; |
28de7948 | 158 | struct extent_position epos = {}; |
48d6d8ff | 159 | struct udf_inode_info *dinfo = UDF_I(dir); |
9fbb76ce AV |
160 | int isdotdot = child->len == 2 && |
161 | child->name[0] == '.' && child->name[1] == '.'; | |
1da177e4 | 162 | |
af793295 JK |
163 | size = udf_ext0_offset(dir) + dir->i_size; |
164 | f_pos = udf_ext0_offset(dir); | |
1da177e4 | 165 | |
b80697c1 | 166 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 167 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
b80697c1 JK |
168 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
169 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
170 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) | |
171 | goto out_err; | |
97e961fd | 172 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 173 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 174 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 175 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 176 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 177 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 178 | } else |
1da177e4 LT |
179 | offset = 0; |
180 | ||
4b11111a | 181 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
b80697c1 JK |
182 | if (!fibh->sbh) |
183 | goto out_err; | |
1da177e4 LT |
184 | } |
185 | ||
b80697c1 JK |
186 | fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
187 | if (!fname) | |
188 | goto out_err; | |
189 | ||
af793295 | 190 | while (f_pos < size) { |
cb00ea35 CG |
191 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
192 | &elen, &offset); | |
b80697c1 JK |
193 | if (!fi) |
194 | goto out_err; | |
1da177e4 LT |
195 | |
196 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
197 | lfi = cfi->lengthFileIdent; | |
198 | ||
cb00ea35 | 199 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 200 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 201 | } else { |
1da177e4 LT |
202 | int poffset; /* Unpaded ending offset */ |
203 | ||
4b11111a MS |
204 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
205 | liu + lfi; | |
1da177e4 | 206 | |
4b11111a MS |
207 | if (poffset >= lfi) |
208 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
209 | poffset - lfi); | |
210 | else { | |
1da177e4 | 211 | nameptr = fname; |
4b11111a MS |
212 | memcpy(nameptr, fi->fileIdent + liu, |
213 | lfi - poffset); | |
214 | memcpy(nameptr + lfi - poffset, | |
215 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
216 | } |
217 | } | |
218 | ||
cb00ea35 CG |
219 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
220 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
221 | continue; |
222 | } | |
cb00ea35 CG |
223 | |
224 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
225 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
226 | continue; |
227 | } | |
228 | ||
221e583a RR |
229 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
230 | isdotdot) { | |
231 | brelse(epos.bh); | |
232 | return fi; | |
233 | } | |
234 | ||
1da177e4 LT |
235 | if (!lfi) |
236 | continue; | |
237 | ||
4b11111a | 238 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
9fbb76ce | 239 | if (flen && udf_match(flen, fname, child->len, child->name)) |
b80697c1 | 240 | goto out_ok; |
1da177e4 | 241 | } |
28de7948 | 242 | |
b80697c1 JK |
243 | out_err: |
244 | fi = NULL; | |
1da177e4 | 245 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
246 | brelse(fibh->ebh); |
247 | brelse(fibh->sbh); | |
b80697c1 | 248 | out_ok: |
3bf25cb4 | 249 | brelse(epos.bh); |
b80697c1 | 250 | kfree(fname); |
28de7948 | 251 | |
b80697c1 | 252 | return fi; |
1da177e4 LT |
253 | } |
254 | ||
cb00ea35 CG |
255 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
256 | struct nameidata *nd) | |
1da177e4 LT |
257 | { |
258 | struct inode *inode = NULL; | |
db9a369e | 259 | struct fileIdentDesc cfi; |
1da177e4 LT |
260 | struct udf_fileident_bh fibh; |
261 | ||
cb00ea35 | 262 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
263 | return ERR_PTR(-ENAMETOOLONG); |
264 | ||
1da177e4 LT |
265 | #ifdef UDF_RECOVERY |
266 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 267 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
5ca4e4be | 268 | struct kernel_lb_addr lb = { |
28de7948 | 269 | .logicalBlockNum = 0, |
4b11111a MS |
270 | .partitionReferenceNum = |
271 | simple_strtoul(dentry->d_name.name + 3, | |
272 | NULL, 0), | |
28de7948 | 273 | }; |
1da177e4 | 274 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 275 | if (!inode) { |
1da177e4 LT |
276 | return ERR_PTR(-EACCES); |
277 | } | |
4b11111a | 278 | } else |
28de7948 | 279 | #endif /* UDF_RECOVERY */ |
1da177e4 | 280 | |
9fbb76ce | 281 | if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { |
97e961fd PE |
282 | struct kernel_lb_addr loc; |
283 | ||
1da177e4 | 284 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
285 | brelse(fibh.ebh); |
286 | brelse(fibh.sbh); | |
1da177e4 | 287 | |
97e961fd PE |
288 | loc = lelb_to_cpu(cfi.icb.extLocation); |
289 | inode = udf_iget(dir->i_sb, &loc); | |
cb00ea35 | 290 | if (!inode) { |
1da177e4 LT |
291 | return ERR_PTR(-EACCES); |
292 | } | |
293 | } | |
28de7948 | 294 | |
221e583a | 295 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
296 | } |
297 | ||
cb00ea35 CG |
298 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
299 | struct dentry *dentry, | |
300 | struct udf_fileident_bh *fibh, | |
301 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 302 | { |
6c79e987 | 303 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 304 | struct fileIdentDesc *fi = NULL; |
391e8bbd | 305 | unsigned char *name = NULL; |
1da177e4 LT |
306 | int namelen; |
307 | loff_t f_pos; | |
af793295 | 308 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
309 | int nfidlen; |
310 | uint8_t lfi; | |
311 | uint16_t liu; | |
312 | int block; | |
5ca4e4be | 313 | struct kernel_lb_addr eloc; |
9afadc4b | 314 | uint32_t elen = 0; |
60448b1d | 315 | sector_t offset; |
28de7948 | 316 | struct extent_position epos = {}; |
48d6d8ff | 317 | struct udf_inode_info *dinfo; |
1da177e4 | 318 | |
b80697c1 JK |
319 | fibh->sbh = fibh->ebh = NULL; |
320 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); | |
321 | if (!name) { | |
322 | *err = -ENOMEM; | |
323 | goto out_err; | |
324 | } | |
325 | ||
cb00ea35 CG |
326 | if (dentry) { |
327 | if (!dentry->d_name.len) { | |
1da177e4 | 328 | *err = -EINVAL; |
b80697c1 | 329 | goto out_err; |
1da177e4 | 330 | } |
4b11111a MS |
331 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
332 | dentry->d_name.len); | |
333 | if (!namelen) { | |
1da177e4 | 334 | *err = -ENAMETOOLONG; |
b80697c1 | 335 | goto out_err; |
1da177e4 | 336 | } |
28de7948 | 337 | } else { |
1da177e4 | 338 | namelen = 0; |
28de7948 | 339 | } |
1da177e4 LT |
340 | |
341 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
342 | ||
af793295 | 343 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 344 | |
af793295 | 345 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 346 | dinfo = UDF_I(dir); |
b80697c1 JK |
347 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
348 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
349 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { | |
350 | block = udf_get_lb_pblock(dir->i_sb, | |
97e961fd | 351 | &dinfo->i_location, 0); |
b80697c1 JK |
352 | fibh->soffset = fibh->eoffset = sb->s_blocksize; |
353 | goto add; | |
354 | } | |
97e961fd | 355 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 356 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 357 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 358 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 359 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 360 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 361 | } else |
1da177e4 LT |
362 | offset = 0; |
363 | ||
4b11111a MS |
364 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
365 | if (!fibh->sbh) { | |
1da177e4 | 366 | *err = -EIO; |
b80697c1 | 367 | goto out_err; |
1da177e4 LT |
368 | } |
369 | ||
48d6d8ff | 370 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 LT |
371 | } |
372 | ||
af793295 | 373 | while (f_pos < size) { |
cb00ea35 CG |
374 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
375 | &elen, &offset); | |
1da177e4 | 376 | |
cb00ea35 | 377 | if (!fi) { |
1da177e4 | 378 | *err = -EIO; |
b80697c1 | 379 | goto out_err; |
1da177e4 LT |
380 | } |
381 | ||
382 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
383 | lfi = cfi->lengthFileIdent; | |
384 | ||
cb00ea35 | 385 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
386 | if (((sizeof(struct fileIdentDesc) + |
387 | liu + lfi + 3) & ~3) == nfidlen) { | |
1da177e4 LT |
388 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
389 | cfi->fileVersionNum = cpu_to_le16(1); | |
390 | cfi->fileCharacteristics = 0; | |
391 | cfi->lengthFileIdent = namelen; | |
392 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
393 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
394 | name)) | |
b80697c1 | 395 | goto out_ok; |
4b11111a | 396 | else { |
1da177e4 | 397 | *err = -EIO; |
b80697c1 | 398 | goto out_err; |
1da177e4 LT |
399 | } |
400 | } | |
401 | } | |
1da177e4 LT |
402 | } |
403 | ||
28de7948 | 404 | add: |
1da177e4 LT |
405 | f_pos += nfidlen; |
406 | ||
48d6d8ff | 407 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 408 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 409 | brelse(epos.bh); |
ff116fc8 | 410 | epos.bh = NULL; |
1da177e4 LT |
411 | fibh->soffset -= udf_ext0_offset(dir); |
412 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 413 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 414 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
415 | brelse(fibh->ebh); |
416 | brelse(fibh->sbh); | |
4b11111a MS |
417 | fibh->sbh = fibh->ebh = |
418 | udf_expand_dir_adinicb(dir, &block, err); | |
419 | if (!fibh->sbh) | |
b80697c1 | 420 | goto out_err; |
48d6d8ff | 421 | epos.block = dinfo->i_location; |
ff116fc8 | 422 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
423 | /* Load extent udf_expand_dir_adinicb() has created */ |
424 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
425 | } |
426 | ||
2c948b3f | 427 | /* Entry fits into current block? */ |
cb00ea35 | 428 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
429 | fibh->soffset = fibh->eoffset; |
430 | fibh->eoffset += nfidlen; | |
cb00ea35 | 431 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 432 | brelse(fibh->sbh); |
1da177e4 LT |
433 | fibh->sbh = fibh->ebh; |
434 | } | |
435 | ||
48d6d8ff MS |
436 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
437 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 438 | fi = (struct fileIdentDesc *) |
48d6d8ff | 439 | (dinfo->i_ext.i_data + |
c0b34438 | 440 | fibh->soffset - |
4b11111a | 441 | udf_ext0_offset(dir) + |
48d6d8ff | 442 | dinfo->i_lenEAttr); |
cb00ea35 | 443 | } else { |
4b11111a MS |
444 | block = eloc.logicalBlockNum + |
445 | ((elen - 1) >> | |
446 | dir->i_sb->s_blocksize_bits); | |
447 | fi = (struct fileIdentDesc *) | |
448 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 449 | } |
cb00ea35 | 450 | } else { |
2c948b3f JK |
451 | /* Round up last extent in the file */ |
452 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); | |
453 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
454 | epos.offset -= sizeof(struct short_ad); | |
455 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
456 | epos.offset -= sizeof(struct long_ad); | |
457 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
458 | dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize | |
459 | - 1) & ~(sb->s_blocksize - 1); | |
460 | ||
1da177e4 LT |
461 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
462 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 463 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 464 | brelse(fibh->sbh); |
1da177e4 LT |
465 | fibh->sbh = fibh->ebh; |
466 | } | |
467 | ||
468 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 469 | dir->i_sb->s_blocksize_bits); |
4b11111a | 470 | fibh->ebh = udf_bread(dir, |
af793295 | 471 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
472 | if (!fibh->ebh) |
473 | goto out_err; | |
4651c590 JK |
474 | /* Extents could have been merged, invalidate our position */ |
475 | brelse(epos.bh); | |
476 | epos.bh = NULL; | |
477 | epos.block = dinfo->i_location; | |
478 | epos.offset = udf_file_entry_alloc_offset(dir); | |
1da177e4 | 479 | |
28de7948 | 480 | if (!fibh->soffset) { |
4651c590 JK |
481 | /* Find the freshly allocated block */ |
482 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
483 | (EXT_RECORDED_ALLOCATED >> 30)) | |
484 | ; | |
485 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
28de7948 | 486 | dir->i_sb->s_blocksize_bits); |
3bf25cb4 | 487 | brelse(fibh->sbh); |
1da177e4 LT |
488 | fibh->sbh = fibh->ebh; |
489 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 490 | } else { |
1da177e4 | 491 | fi = (struct fileIdentDesc *) |
4b11111a MS |
492 | (fibh->sbh->b_data + sb->s_blocksize + |
493 | fibh->soffset); | |
1da177e4 LT |
494 | } |
495 | } | |
496 | ||
497 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 498 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a | 499 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
5ca4e4be | 500 | sizeof(struct tag)); |
1da177e4 | 501 | else |
4b11111a | 502 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
5ca4e4be | 503 | sizeof(struct tag)); |
1da177e4 LT |
504 | cfi->fileVersionNum = cpu_to_le16(1); |
505 | cfi->lengthFileIdent = namelen; | |
506 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 507 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 508 | dir->i_size += nfidlen; |
48d6d8ff MS |
509 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
510 | dinfo->i_lenAlloc += nfidlen; | |
2c948b3f JK |
511 | else { |
512 | /* Find the last extent and truncate it to proper size */ | |
513 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
514 | (EXT_RECORDED_ALLOCATED >> 30)) | |
515 | ; | |
516 | elen -= dinfo->i_lenExtents - dir->i_size; | |
517 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
518 | epos.offset -= sizeof(struct short_ad); | |
519 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
520 | epos.offset -= sizeof(struct long_ad); | |
521 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
522 | dinfo->i_lenExtents = dir->i_size; | |
523 | } | |
524 | ||
1da177e4 | 525 | mark_inode_dirty(dir); |
b80697c1 | 526 | goto out_ok; |
cb00ea35 | 527 | } else { |
1da177e4 | 528 | *err = -EIO; |
b80697c1 | 529 | goto out_err; |
1da177e4 | 530 | } |
b80697c1 JK |
531 | |
532 | out_err: | |
533 | fi = NULL; | |
534 | if (fibh->sbh != fibh->ebh) | |
535 | brelse(fibh->ebh); | |
536 | brelse(fibh->sbh); | |
537 | out_ok: | |
538 | brelse(epos.bh); | |
539 | kfree(name); | |
540 | return fi; | |
1da177e4 LT |
541 | } |
542 | ||
543 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
544 | struct udf_fileident_bh *fibh, |
545 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
546 | { |
547 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 548 | |
1da177e4 | 549 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
5ca4e4be | 550 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
28de7948 | 551 | |
1da177e4 LT |
552 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
553 | } | |
554 | ||
cb00ea35 CG |
555 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
556 | struct nameidata *nd) | |
1da177e4 LT |
557 | { |
558 | struct udf_fileident_bh fibh; | |
559 | struct inode *inode; | |
560 | struct fileIdentDesc cfi, *fi; | |
561 | int err; | |
48d6d8ff | 562 | struct udf_inode_info *iinfo; |
1da177e4 | 563 | |
1da177e4 | 564 | inode = udf_new_inode(dir, mode, &err); |
cb00ea35 | 565 | if (!inode) { |
1da177e4 LT |
566 | return err; |
567 | } | |
568 | ||
48d6d8ff MS |
569 | iinfo = UDF_I(inode); |
570 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
571 | inode->i_data.a_ops = &udf_adinicb_aops; |
572 | else | |
573 | inode->i_data.a_ops = &udf_aops; | |
574 | inode->i_op = &udf_file_inode_operations; | |
575 | inode->i_fop = &udf_file_operations; | |
1da177e4 LT |
576 | mark_inode_dirty(inode); |
577 | ||
4b11111a MS |
578 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
579 | if (!fi) { | |
cb00ea35 | 580 | inode->i_nlink--; |
1da177e4 LT |
581 | mark_inode_dirty(inode); |
582 | iput(inode); | |
1da177e4 LT |
583 | return err; |
584 | } | |
585 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 586 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 587 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 588 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 589 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 590 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 591 | mark_inode_dirty(dir); |
1da177e4 | 592 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
593 | brelse(fibh.ebh); |
594 | brelse(fibh.sbh); | |
1da177e4 | 595 | d_instantiate(dentry, inode); |
28de7948 | 596 | |
1da177e4 LT |
597 | return 0; |
598 | } | |
599 | ||
cb00ea35 CG |
600 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
601 | dev_t rdev) | |
1da177e4 | 602 | { |
cb00ea35 | 603 | struct inode *inode; |
1da177e4 LT |
604 | struct udf_fileident_bh fibh; |
605 | struct fileIdentDesc cfi, *fi; | |
606 | int err; | |
48d6d8ff | 607 | struct udf_inode_info *iinfo; |
1da177e4 LT |
608 | |
609 | if (!old_valid_dev(rdev)) | |
610 | return -EINVAL; | |
611 | ||
1da177e4 LT |
612 | err = -EIO; |
613 | inode = udf_new_inode(dir, mode, &err); | |
614 | if (!inode) | |
615 | goto out; | |
616 | ||
48d6d8ff | 617 | iinfo = UDF_I(inode); |
1da177e4 | 618 | init_special_inode(inode, mode, rdev); |
4b11111a MS |
619 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
620 | if (!fi) { | |
cb00ea35 | 621 | inode->i_nlink--; |
1da177e4 LT |
622 | mark_inode_dirty(inode); |
623 | iput(inode); | |
1da177e4 LT |
624 | return err; |
625 | } | |
626 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 627 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 628 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 629 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 630 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 631 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 632 | mark_inode_dirty(dir); |
1da177e4 LT |
633 | mark_inode_dirty(inode); |
634 | ||
635 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
636 | brelse(fibh.ebh); |
637 | brelse(fibh.sbh); | |
1da177e4 LT |
638 | d_instantiate(dentry, inode); |
639 | err = 0; | |
28de7948 CG |
640 | |
641 | out: | |
1da177e4 LT |
642 | return err; |
643 | } | |
644 | ||
cb00ea35 | 645 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 646 | { |
cb00ea35 | 647 | struct inode *inode; |
1da177e4 LT |
648 | struct udf_fileident_bh fibh; |
649 | struct fileIdentDesc cfi, *fi; | |
650 | int err; | |
48d6d8ff MS |
651 | struct udf_inode_info *dinfo = UDF_I(dir); |
652 | struct udf_inode_info *iinfo; | |
1da177e4 | 653 | |
1da177e4 | 654 | err = -EMLINK; |
cb00ea35 | 655 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
656 | goto out; |
657 | ||
658 | err = -EIO; | |
a6c5a034 | 659 | inode = udf_new_inode(dir, S_IFDIR | mode, &err); |
1da177e4 LT |
660 | if (!inode) |
661 | goto out; | |
662 | ||
48d6d8ff | 663 | iinfo = UDF_I(inode); |
1da177e4 LT |
664 | inode->i_op = &udf_dir_inode_operations; |
665 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
666 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
667 | if (!fi) { | |
1da177e4 LT |
668 | inode->i_nlink--; |
669 | mark_inode_dirty(inode); | |
670 | iput(inode); | |
671 | goto out; | |
672 | } | |
673 | inode->i_nlink = 2; | |
674 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 675 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 676 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 677 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
678 | cfi.fileCharacteristics = |
679 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 680 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 681 | brelse(fibh.sbh); |
1da177e4 LT |
682 | mark_inode_dirty(inode); |
683 | ||
4b11111a MS |
684 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
685 | if (!fi) { | |
1da177e4 LT |
686 | inode->i_nlink = 0; |
687 | mark_inode_dirty(inode); | |
688 | iput(inode); | |
689 | goto out; | |
690 | } | |
691 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 692 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 693 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 694 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
695 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
696 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 697 | inc_nlink(dir); |
1da177e4 LT |
698 | mark_inode_dirty(dir); |
699 | d_instantiate(dentry, inode); | |
700 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
701 | brelse(fibh.ebh); |
702 | brelse(fibh.sbh); | |
1da177e4 | 703 | err = 0; |
28de7948 CG |
704 | |
705 | out: | |
1da177e4 LT |
706 | return err; |
707 | } | |
708 | ||
709 | static int empty_dir(struct inode *dir) | |
710 | { | |
711 | struct fileIdentDesc *fi, cfi; | |
712 | struct udf_fileident_bh fibh; | |
713 | loff_t f_pos; | |
af793295 | 714 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 715 | int block; |
5ca4e4be | 716 | struct kernel_lb_addr eloc; |
ff116fc8 | 717 | uint32_t elen; |
60448b1d | 718 | sector_t offset; |
28de7948 | 719 | struct extent_position epos = {}; |
48d6d8ff | 720 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 721 | |
af793295 JK |
722 | f_pos = udf_ext0_offset(dir); |
723 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 724 | |
48d6d8ff | 725 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 726 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 727 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
728 | &epos, &eloc, &elen, &offset) == |
729 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
97e961fd | 730 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 731 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 732 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 733 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 734 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 735 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 736 | } else |
1da177e4 LT |
737 | offset = 0; |
738 | ||
4b11111a MS |
739 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
740 | if (!fibh.sbh) { | |
3bf25cb4 | 741 | brelse(epos.bh); |
1da177e4 LT |
742 | return 0; |
743 | } | |
cb00ea35 | 744 | } else { |
3bf25cb4 | 745 | brelse(epos.bh); |
1da177e4 LT |
746 | return 0; |
747 | } | |
748 | ||
af793295 | 749 | while (f_pos < size) { |
cb00ea35 CG |
750 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
751 | &elen, &offset); | |
cb00ea35 | 752 | if (!fi) { |
1da177e4 | 753 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
754 | brelse(fibh.ebh); |
755 | brelse(fibh.sbh); | |
756 | brelse(epos.bh); | |
1da177e4 LT |
757 | return 0; |
758 | } | |
759 | ||
28de7948 CG |
760 | if (cfi.lengthFileIdent && |
761 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 762 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
763 | brelse(fibh.ebh); |
764 | brelse(fibh.sbh); | |
765 | brelse(epos.bh); | |
1da177e4 LT |
766 | return 0; |
767 | } | |
768 | } | |
28de7948 | 769 | |
1da177e4 | 770 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
771 | brelse(fibh.ebh); |
772 | brelse(fibh.sbh); | |
773 | brelse(epos.bh); | |
28de7948 | 774 | |
1da177e4 LT |
775 | return 1; |
776 | } | |
777 | ||
cb00ea35 | 778 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
779 | { |
780 | int retval; | |
cb00ea35 | 781 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
782 | struct udf_fileident_bh fibh; |
783 | struct fileIdentDesc *fi, cfi; | |
5ca4e4be | 784 | struct kernel_lb_addr tloc; |
1da177e4 LT |
785 | |
786 | retval = -ENOENT; | |
9fbb76ce | 787 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
788 | if (!fi) |
789 | goto out; | |
790 | ||
791 | retval = -EIO; | |
792 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 793 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
794 | goto end_rmdir; |
795 | retval = -ENOTEMPTY; | |
796 | if (!empty_dir(inode)) | |
797 | goto end_rmdir; | |
798 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
799 | if (retval) | |
800 | goto end_rmdir; | |
801 | if (inode->i_nlink != 2) | |
802 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
803 | "empty directory has nlink != 2 (%d)", |
804 | inode->i_nlink); | |
ce71ec36 | 805 | clear_nlink(inode); |
1da177e4 | 806 | inode->i_size = 0; |
c007c06e | 807 | inode_dec_link_count(dir); |
4b11111a MS |
808 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
809 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
810 | mark_inode_dirty(dir); |
811 | ||
28de7948 | 812 | end_rmdir: |
1da177e4 | 813 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
814 | brelse(fibh.ebh); |
815 | brelse(fibh.sbh); | |
28de7948 CG |
816 | |
817 | out: | |
1da177e4 LT |
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; | |
5ca4e4be | 828 | struct kernel_lb_addr tloc; |
1da177e4 LT |
829 | |
830 | retval = -ENOENT; | |
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); | |
97e961fd | 837 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
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 | return retval; |
861 | } | |
862 | ||
cb00ea35 CG |
863 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
864 | const char *symname) | |
1da177e4 | 865 | { |
cb00ea35 | 866 | struct inode *inode; |
1da177e4 | 867 | struct pathComponent *pc; |
391e8bbd | 868 | const char *compstart; |
1da177e4 | 869 | struct udf_fileident_bh fibh; |
28de7948 | 870 | struct extent_position epos = {}; |
1da177e4 LT |
871 | int eoffset, elen = 0; |
872 | struct fileIdentDesc *fi; | |
873 | struct fileIdentDesc cfi; | |
391e8bbd | 874 | uint8_t *ea; |
1da177e4 LT |
875 | int err; |
876 | int block; | |
391e8bbd | 877 | unsigned char *name = NULL; |
1da177e4 | 878 | int namelen; |
48d6d8ff | 879 | struct udf_inode_info *iinfo; |
d664b6af | 880 | struct super_block *sb = dir->i_sb; |
1da177e4 | 881 | |
a6c5a034 | 882 | inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err); |
4b11111a | 883 | if (!inode) |
1da177e4 LT |
884 | goto out; |
885 | ||
4d0fb621 AIB |
886 | iinfo = UDF_I(inode); |
887 | down_write(&iinfo->i_data_sem); | |
b80697c1 JK |
888 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
889 | if (!name) { | |
890 | err = -ENOMEM; | |
891 | goto out_no_entry; | |
892 | } | |
893 | ||
1da177e4 | 894 | inode->i_data.a_ops = &udf_symlink_aops; |
c15d0fc0 | 895 | inode->i_op = &udf_symlink_inode_operations; |
1da177e4 | 896 | |
48d6d8ff | 897 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
5ca4e4be | 898 | struct kernel_lb_addr eloc; |
78e917d5 | 899 | uint32_t bsize; |
1da177e4 | 900 | |
d664b6af | 901 | block = udf_new_block(sb, inode, |
48d6d8ff MS |
902 | iinfo->i_location.partitionReferenceNum, |
903 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
904 | if (!block) |
905 | goto out_no_entry; | |
48d6d8ff | 906 | epos.block = iinfo->i_location; |
ff116fc8 JK |
907 | epos.offset = udf_file_entry_alloc_offset(inode); |
908 | epos.bh = NULL; | |
1da177e4 | 909 | eloc.logicalBlockNum = block; |
4b11111a | 910 | eloc.partitionReferenceNum = |
48d6d8ff | 911 | iinfo->i_location.partitionReferenceNum; |
d664b6af | 912 | bsize = sb->s_blocksize; |
78e917d5 | 913 | iinfo->i_lenExtents = bsize; |
97e961fd | 914 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
3bf25cb4 | 915 | brelse(epos.bh); |
1da177e4 | 916 | |
d664b6af | 917 | block = udf_get_pblock(sb, block, |
48d6d8ff | 918 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 919 | 0); |
d664b6af | 920 | epos.bh = udf_tgetblk(sb, block); |
ff116fc8 | 921 | lock_buffer(epos.bh); |
d664b6af | 922 | memset(epos.bh->b_data, 0x00, bsize); |
ff116fc8 JK |
923 | set_buffer_uptodate(epos.bh); |
924 | unlock_buffer(epos.bh); | |
925 | mark_buffer_dirty_inode(epos.bh, inode); | |
926 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
927 | } else |
928 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 | 929 | |
d664b6af | 930 | eoffset = sb->s_blocksize - udf_ext0_offset(inode); |
1da177e4 LT |
931 | pc = (struct pathComponent *)ea; |
932 | ||
cb00ea35 CG |
933 | if (*symname == '/') { |
934 | do { | |
1da177e4 LT |
935 | symname++; |
936 | } while (*symname == '/'); | |
937 | ||
938 | pc->componentType = 1; | |
939 | pc->lengthComponentIdent = 0; | |
940 | pc->componentFileVersionNum = 0; | |
1da177e4 LT |
941 | elen += sizeof(struct pathComponent); |
942 | } | |
943 | ||
944 | err = -ENAMETOOLONG; | |
945 | ||
cb00ea35 | 946 | while (*symname) { |
1da177e4 LT |
947 | if (elen + sizeof(struct pathComponent) > eoffset) |
948 | goto out_no_entry; | |
949 | ||
950 | pc = (struct pathComponent *)(ea + elen); | |
951 | ||
391e8bbd | 952 | compstart = symname; |
1da177e4 | 953 | |
cb00ea35 | 954 | do { |
1da177e4 LT |
955 | symname++; |
956 | } while (*symname && *symname != '/'); | |
957 | ||
958 | pc->componentType = 5; | |
959 | pc->lengthComponentIdent = 0; | |
960 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
961 | if (compstart[0] == '.') { |
962 | if ((symname - compstart) == 1) | |
1da177e4 | 963 | pc->componentType = 4; |
4b11111a MS |
964 | else if ((symname - compstart) == 2 && |
965 | compstart[1] == '.') | |
1da177e4 LT |
966 | pc->componentType = 3; |
967 | } | |
968 | ||
cb00ea35 | 969 | if (pc->componentType == 5) { |
d664b6af | 970 | namelen = udf_put_filename(sb, compstart, name, |
28de7948 CG |
971 | symname - compstart); |
972 | if (!namelen) | |
1da177e4 LT |
973 | goto out_no_entry; |
974 | ||
4b11111a MS |
975 | if (elen + sizeof(struct pathComponent) + namelen > |
976 | eoffset) | |
1da177e4 LT |
977 | goto out_no_entry; |
978 | else | |
979 | pc->lengthComponentIdent = namelen; | |
980 | ||
981 | memcpy(pc->componentIdent, name, namelen); | |
982 | } | |
983 | ||
984 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
985 | ||
cb00ea35 CG |
986 | if (*symname) { |
987 | do { | |
1da177e4 LT |
988 | symname++; |
989 | } while (*symname == '/'); | |
990 | } | |
991 | } | |
992 | ||
3bf25cb4 | 993 | brelse(epos.bh); |
1da177e4 | 994 | inode->i_size = elen; |
48d6d8ff MS |
995 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
996 | iinfo->i_lenAlloc = inode->i_size; | |
2c948b3f JK |
997 | else |
998 | udf_truncate_tail_extent(inode); | |
1da177e4 LT |
999 | mark_inode_dirty(inode); |
1000 | ||
4b11111a MS |
1001 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1002 | if (!fi) | |
1da177e4 | 1003 | goto out_no_entry; |
d664b6af | 1004 | cfi.icb.extLength = cpu_to_le32(sb->s_blocksize); |
48d6d8ff | 1005 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
d664b6af | 1006 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
28de7948 | 1007 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
d664b6af | 1008 | cpu_to_le32(lvid_get_unique_id(sb)); |
1da177e4 LT |
1009 | } |
1010 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1011 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1012 | mark_inode_dirty(dir); |
4d0fb621 | 1013 | up_write(&iinfo->i_data_sem); |
1da177e4 | 1014 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1015 | brelse(fibh.ebh); |
1016 | brelse(fibh.sbh); | |
1da177e4 LT |
1017 | d_instantiate(dentry, inode); |
1018 | err = 0; | |
1019 | ||
28de7948 | 1020 | out: |
b80697c1 | 1021 | kfree(name); |
1da177e4 LT |
1022 | return err; |
1023 | ||
28de7948 | 1024 | out_no_entry: |
4d0fb621 | 1025 | up_write(&iinfo->i_data_sem); |
9a53c3a7 | 1026 | inode_dec_link_count(inode); |
1da177e4 LT |
1027 | iput(inode); |
1028 | goto out; | |
1029 | } | |
1030 | ||
cb00ea35 CG |
1031 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1032 | struct dentry *dentry) | |
1da177e4 LT |
1033 | { |
1034 | struct inode *inode = old_dentry->d_inode; | |
1035 | struct udf_fileident_bh fibh; | |
1036 | struct fileIdentDesc cfi, *fi; | |
1037 | int err; | |
1038 | ||
cb00ea35 | 1039 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1040 | return -EMLINK; |
1041 | } | |
1042 | ||
4b11111a MS |
1043 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1044 | if (!fi) { | |
1da177e4 LT |
1045 | return err; |
1046 | } | |
1047 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1048 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
d664b6af | 1049 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
28de7948 | 1050 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
d664b6af | 1051 | cpu_to_le32(lvid_get_unique_id(inode->i_sb)); |
1da177e4 LT |
1052 | } |
1053 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1054 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1055 | mark_inode_dirty(dir); |
28de7948 | 1056 | |
1da177e4 | 1057 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1058 | brelse(fibh.ebh); |
1059 | brelse(fibh.sbh); | |
d8c76e6f | 1060 | inc_nlink(inode); |
1da177e4 LT |
1061 | inode->i_ctime = current_fs_time(inode->i_sb); |
1062 | mark_inode_dirty(inode); | |
7de9c6ee | 1063 | ihold(inode); |
1da177e4 | 1064 | d_instantiate(dentry, inode); |
28de7948 | 1065 | |
1da177e4 LT |
1066 | return 0; |
1067 | } | |
1068 | ||
1069 | /* Anybody can rename anything with this: the permission checks are left to the | |
1070 | * higher-level routines. | |
1071 | */ | |
cb00ea35 CG |
1072 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1073 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1074 | { |
cb00ea35 CG |
1075 | struct inode *old_inode = old_dentry->d_inode; |
1076 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1077 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1078 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1079 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1080 | struct buffer_head *dir_bh = NULL; |
1081 | int retval = -ENOENT; | |
5ca4e4be | 1082 | struct kernel_lb_addr tloc; |
48d6d8ff | 1083 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 | 1084 | |
9fbb76ce | 1085 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
4b11111a | 1086 | if (ofi) { |
1da177e4 | 1087 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1088 | brelse(ofibh.ebh); |
1089 | brelse(ofibh.sbh); | |
1da177e4 LT |
1090 | } |
1091 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
97e961fd | 1092 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
cb00ea35 | 1093 | != old_inode->i_ino) |
1da177e4 LT |
1094 | goto end_rename; |
1095 | ||
9fbb76ce | 1096 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
cb00ea35 CG |
1097 | if (nfi) { |
1098 | if (!new_inode) { | |
1da177e4 | 1099 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1100 | brelse(nfibh.ebh); |
1101 | brelse(nfibh.sbh); | |
1da177e4 LT |
1102 | nfi = NULL; |
1103 | } | |
1104 | } | |
cb00ea35 | 1105 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1106 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1107 | |
cb00ea35 | 1108 | if (new_inode) { |
1da177e4 LT |
1109 | retval = -ENOTEMPTY; |
1110 | if (!empty_dir(new_inode)) | |
1111 | goto end_rename; | |
1112 | } | |
1113 | retval = -EIO; | |
48d6d8ff | 1114 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1115 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1116 | old_iinfo->i_ext.i_data - |
1117 | (old_iinfo->i_efe ? | |
4b11111a MS |
1118 | sizeof(struct extendedFileEntry) : |
1119 | sizeof(struct fileEntry)), | |
1120 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1121 | } else { |
1da177e4 LT |
1122 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1123 | if (!dir_bh) | |
1124 | goto end_rename; | |
4b11111a MS |
1125 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1126 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1127 | } |
1128 | if (!dir_fi) | |
1129 | goto end_rename; | |
1130 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
97e961fd | 1131 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
4b11111a | 1132 | old_dir->i_ino) |
1da177e4 LT |
1133 | goto end_rename; |
1134 | ||
1135 | retval = -EMLINK; | |
4b11111a MS |
1136 | if (!new_inode && |
1137 | new_dir->i_nlink >= | |
1138 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1139 | goto end_rename; |
1140 | } | |
cb00ea35 | 1141 | if (!nfi) { |
4b11111a MS |
1142 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1143 | &retval); | |
1da177e4 LT |
1144 | if (!nfi) |
1145 | goto end_rename; | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * Like most other Unix systems, set the ctime for inodes on a | |
1150 | * rename. | |
1151 | */ | |
1152 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1153 | mark_inode_dirty(old_inode); | |
1154 | ||
1155 | /* | |
1156 | * ok, that's it | |
1157 | */ | |
1158 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1159 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
5ca4e4be | 1160 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
1da177e4 LT |
1161 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
1162 | ||
1163 | /* The old fid may have moved - find it again */ | |
9fbb76ce | 1164 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
1da177e4 LT |
1165 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
1166 | ||
cb00ea35 | 1167 | if (new_inode) { |
1da177e4 | 1168 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1169 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1170 | } |
1171 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1172 | mark_inode_dirty(old_dir); | |
1173 | ||
cb00ea35 | 1174 | if (dir_fi) { |
c0b34438 | 1175 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1176 | udf_update_tag((char *)dir_fi, |
1177 | (sizeof(struct fileIdentDesc) + | |
1178 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1179 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1180 | mark_inode_dirty(old_inode); |
4b11111a | 1181 | else |
1da177e4 | 1182 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1183 | |
9a53c3a7 | 1184 | inode_dec_link_count(old_dir); |
4b11111a | 1185 | if (new_inode) |
9a53c3a7 | 1186 | inode_dec_link_count(new_inode); |
4b11111a | 1187 | else { |
d8c76e6f | 1188 | inc_nlink(new_dir); |
1da177e4 LT |
1189 | mark_inode_dirty(new_dir); |
1190 | } | |
1191 | } | |
1192 | ||
cb00ea35 | 1193 | if (ofi) { |
1da177e4 | 1194 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1195 | brelse(ofibh.ebh); |
1196 | brelse(ofibh.sbh); | |
1da177e4 LT |
1197 | } |
1198 | ||
1199 | retval = 0; | |
1200 | ||
28de7948 | 1201 | end_rename: |
3bf25cb4 | 1202 | brelse(dir_bh); |
cb00ea35 | 1203 | if (nfi) { |
1da177e4 | 1204 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1205 | brelse(nfibh.ebh); |
1206 | brelse(nfibh.sbh); | |
1da177e4 | 1207 | } |
28de7948 | 1208 | |
1da177e4 LT |
1209 | return retval; |
1210 | } | |
1211 | ||
221e583a RR |
1212 | static struct dentry *udf_get_parent(struct dentry *child) |
1213 | { | |
97e961fd | 1214 | struct kernel_lb_addr tloc; |
221e583a | 1215 | struct inode *inode = NULL; |
9fbb76ce | 1216 | struct qstr dotdot = {.name = "..", .len = 2}; |
221e583a RR |
1217 | struct fileIdentDesc cfi; |
1218 | struct udf_fileident_bh fibh; | |
1219 | ||
221e583a RR |
1220 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) |
1221 | goto out_unlock; | |
1222 | ||
1223 | if (fibh.sbh != fibh.ebh) | |
1224 | brelse(fibh.ebh); | |
1225 | brelse(fibh.sbh); | |
1226 | ||
97e961fd PE |
1227 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
1228 | inode = udf_iget(child->d_inode->i_sb, &tloc); | |
221e583a RR |
1229 | if (!inode) |
1230 | goto out_unlock; | |
221e583a | 1231 | |
44003728 | 1232 | return d_obtain_alias(inode); |
221e583a | 1233 | out_unlock: |
221e583a RR |
1234 | return ERR_PTR(-EACCES); |
1235 | } | |
1236 | ||
1237 | ||
1238 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1239 | u16 partref, __u32 generation) | |
1240 | { | |
1241 | struct inode *inode; | |
5ca4e4be | 1242 | struct kernel_lb_addr loc; |
221e583a RR |
1243 | |
1244 | if (block == 0) | |
1245 | return ERR_PTR(-ESTALE); | |
1246 | ||
1247 | loc.logicalBlockNum = block; | |
1248 | loc.partitionReferenceNum = partref; | |
97e961fd | 1249 | inode = udf_iget(sb, &loc); |
221e583a RR |
1250 | |
1251 | if (inode == NULL) | |
1252 | return ERR_PTR(-ENOMEM); | |
1253 | ||
1254 | if (generation && inode->i_generation != generation) { | |
1255 | iput(inode); | |
1256 | return ERR_PTR(-ESTALE); | |
1257 | } | |
44003728 | 1258 | return d_obtain_alias(inode); |
221e583a RR |
1259 | } |
1260 | ||
1261 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1262 | struct fid *fid, int fh_len, int fh_type) | |
1263 | { | |
1264 | if ((fh_len != 3 && fh_len != 5) || | |
1265 | (fh_type != FILEID_UDF_WITH_PARENT && | |
1266 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1267 | return NULL; | |
1268 | ||
1269 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1270 | fid->udf.generation); | |
1271 | } | |
1272 | ||
1273 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1274 | struct fid *fid, int fh_len, int fh_type) | |
1275 | { | |
1276 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) | |
1277 | return NULL; | |
1278 | ||
1279 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1280 | fid->udf.parent_partref, | |
1281 | fid->udf.parent_generation); | |
1282 | } | |
1283 | static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, | |
1284 | int connectable) | |
1285 | { | |
1286 | int len = *lenp; | |
1287 | struct inode *inode = de->d_inode; | |
5ca4e4be | 1288 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
221e583a RR |
1289 | struct fid *fid = (struct fid *)fh; |
1290 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1291 | ||
1292 | if (len < 3 || (connectable && len < 5)) | |
1293 | return 255; | |
1294 | ||
1295 | *lenp = 3; | |
1296 | fid->udf.block = location.logicalBlockNum; | |
1297 | fid->udf.partref = location.partitionReferenceNum; | |
1298 | fid->udf.generation = inode->i_generation; | |
1299 | ||
1300 | if (connectable && !S_ISDIR(inode->i_mode)) { | |
1301 | spin_lock(&de->d_lock); | |
1302 | inode = de->d_parent->d_inode; | |
1303 | location = UDF_I(inode)->i_location; | |
1304 | fid->udf.parent_block = location.logicalBlockNum; | |
1305 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1306 | fid->udf.parent_generation = inode->i_generation; | |
1307 | spin_unlock(&de->d_lock); | |
1308 | *lenp = 5; | |
1309 | type = FILEID_UDF_WITH_PARENT; | |
1310 | } | |
1311 | ||
1312 | return type; | |
1313 | } | |
1314 | ||
1315 | const struct export_operations udf_export_ops = { | |
1316 | .encode_fh = udf_encode_fh, | |
1317 | .fh_to_dentry = udf_fh_to_dentry, | |
1318 | .fh_to_parent = udf_fh_to_parent, | |
1319 | .get_parent = udf_get_parent, | |
1320 | }; | |
1321 | ||
c5ef1c42 | 1322 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1323 | .lookup = udf_lookup, |
1324 | .create = udf_create, | |
1325 | .link = udf_link, | |
1326 | .unlink = udf_unlink, | |
1327 | .symlink = udf_symlink, | |
1328 | .mkdir = udf_mkdir, | |
1329 | .rmdir = udf_rmdir, | |
1330 | .mknod = udf_mknod, | |
1331 | .rename = udf_rename, | |
1da177e4 | 1332 | }; |
c15d0fc0 DM |
1333 | const struct inode_operations udf_symlink_inode_operations = { |
1334 | .readlink = generic_readlink, | |
1335 | .follow_link = page_follow_link_light, | |
1336 | .put_link = page_put_link, | |
c15d0fc0 | 1337 | }; |