Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * namei.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998-2004 Ben Fennema | |
14 | * (C) 1999-2000 Stelias Computing Inc | |
15 | * | |
16 | * HISTORY | |
17 | * | |
18 | * 12/12/98 blf Created. Split out the lookup code from dir.c | |
19 | * 04/19/99 blf link, mknod, symlink support | |
20 | */ | |
21 | ||
22 | #include "udfdecl.h" | |
23 | ||
24 | #include "udf_i.h" | |
25 | #include "udf_sb.h" | |
26 | #include <linux/string.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
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 | 229 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
a4264b3f JJ |
230 | isdotdot) |
231 | goto out_ok; | |
221e583a | 232 | |
1da177e4 LT |
233 | if (!lfi) |
234 | continue; | |
235 | ||
4b11111a | 236 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
9fbb76ce | 237 | if (flen && udf_match(flen, fname, child->len, child->name)) |
b80697c1 | 238 | goto out_ok; |
1da177e4 | 239 | } |
28de7948 | 240 | |
b80697c1 JK |
241 | out_err: |
242 | fi = NULL; | |
1da177e4 | 243 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
244 | brelse(fibh->ebh); |
245 | brelse(fibh->sbh); | |
b80697c1 | 246 | out_ok: |
3bf25cb4 | 247 | brelse(epos.bh); |
b80697c1 | 248 | kfree(fname); |
28de7948 | 249 | |
b80697c1 | 250 | return fi; |
1da177e4 LT |
251 | } |
252 | ||
cb00ea35 CG |
253 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
254 | struct nameidata *nd) | |
1da177e4 LT |
255 | { |
256 | struct inode *inode = NULL; | |
db9a369e | 257 | struct fileIdentDesc cfi; |
1da177e4 LT |
258 | struct udf_fileident_bh fibh; |
259 | ||
cb00ea35 | 260 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
261 | return ERR_PTR(-ENAMETOOLONG); |
262 | ||
1da177e4 LT |
263 | #ifdef UDF_RECOVERY |
264 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 265 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
5ca4e4be | 266 | struct kernel_lb_addr lb = { |
28de7948 | 267 | .logicalBlockNum = 0, |
4b11111a MS |
268 | .partitionReferenceNum = |
269 | simple_strtoul(dentry->d_name.name + 3, | |
270 | NULL, 0), | |
28de7948 | 271 | }; |
1da177e4 | 272 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 273 | if (!inode) { |
1da177e4 LT |
274 | return ERR_PTR(-EACCES); |
275 | } | |
4b11111a | 276 | } else |
28de7948 | 277 | #endif /* UDF_RECOVERY */ |
1da177e4 | 278 | |
9fbb76ce | 279 | if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { |
97e961fd PE |
280 | struct kernel_lb_addr loc; |
281 | ||
1da177e4 | 282 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
283 | brelse(fibh.ebh); |
284 | brelse(fibh.sbh); | |
1da177e4 | 285 | |
97e961fd PE |
286 | loc = lelb_to_cpu(cfi.icb.extLocation); |
287 | inode = udf_iget(dir->i_sb, &loc); | |
cb00ea35 | 288 | if (!inode) { |
1da177e4 LT |
289 | return ERR_PTR(-EACCES); |
290 | } | |
291 | } | |
28de7948 | 292 | |
221e583a | 293 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
294 | } |
295 | ||
cb00ea35 CG |
296 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
297 | struct dentry *dentry, | |
298 | struct udf_fileident_bh *fibh, | |
299 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 300 | { |
6c79e987 | 301 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 302 | struct fileIdentDesc *fi = NULL; |
391e8bbd | 303 | unsigned char *name = NULL; |
1da177e4 LT |
304 | int namelen; |
305 | loff_t f_pos; | |
af793295 | 306 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
307 | int nfidlen; |
308 | uint8_t lfi; | |
309 | uint16_t liu; | |
310 | int block; | |
5ca4e4be | 311 | struct kernel_lb_addr eloc; |
9afadc4b | 312 | uint32_t elen = 0; |
60448b1d | 313 | sector_t offset; |
28de7948 | 314 | struct extent_position epos = {}; |
48d6d8ff | 315 | struct udf_inode_info *dinfo; |
1da177e4 | 316 | |
b80697c1 JK |
317 | fibh->sbh = fibh->ebh = NULL; |
318 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); | |
319 | if (!name) { | |
320 | *err = -ENOMEM; | |
321 | goto out_err; | |
322 | } | |
323 | ||
cb00ea35 CG |
324 | if (dentry) { |
325 | if (!dentry->d_name.len) { | |
1da177e4 | 326 | *err = -EINVAL; |
b80697c1 | 327 | goto out_err; |
1da177e4 | 328 | } |
4b11111a MS |
329 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
330 | dentry->d_name.len); | |
331 | if (!namelen) { | |
1da177e4 | 332 | *err = -ENAMETOOLONG; |
b80697c1 | 333 | goto out_err; |
1da177e4 | 334 | } |
28de7948 | 335 | } else { |
1da177e4 | 336 | namelen = 0; |
28de7948 | 337 | } |
1da177e4 LT |
338 | |
339 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
340 | ||
af793295 | 341 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 342 | |
af793295 | 343 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 344 | dinfo = UDF_I(dir); |
b80697c1 JK |
345 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
346 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
347 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { | |
348 | block = udf_get_lb_pblock(dir->i_sb, | |
97e961fd | 349 | &dinfo->i_location, 0); |
b80697c1 JK |
350 | fibh->soffset = fibh->eoffset = sb->s_blocksize; |
351 | goto add; | |
352 | } | |
97e961fd | 353 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 354 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 355 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 356 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 357 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 358 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 359 | } else |
1da177e4 LT |
360 | offset = 0; |
361 | ||
4b11111a MS |
362 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
363 | if (!fibh->sbh) { | |
1da177e4 | 364 | *err = -EIO; |
b80697c1 | 365 | goto out_err; |
1da177e4 LT |
366 | } |
367 | ||
48d6d8ff | 368 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 LT |
369 | } |
370 | ||
af793295 | 371 | while (f_pos < size) { |
cb00ea35 CG |
372 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
373 | &elen, &offset); | |
1da177e4 | 374 | |
cb00ea35 | 375 | if (!fi) { |
1da177e4 | 376 | *err = -EIO; |
b80697c1 | 377 | goto out_err; |
1da177e4 LT |
378 | } |
379 | ||
380 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
381 | lfi = cfi->lengthFileIdent; | |
382 | ||
cb00ea35 | 383 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
384 | if (((sizeof(struct fileIdentDesc) + |
385 | liu + lfi + 3) & ~3) == nfidlen) { | |
1da177e4 LT |
386 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
387 | cfi->fileVersionNum = cpu_to_le16(1); | |
388 | cfi->fileCharacteristics = 0; | |
389 | cfi->lengthFileIdent = namelen; | |
390 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
391 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
392 | name)) | |
b80697c1 | 393 | goto out_ok; |
4b11111a | 394 | else { |
1da177e4 | 395 | *err = -EIO; |
b80697c1 | 396 | goto out_err; |
1da177e4 LT |
397 | } |
398 | } | |
399 | } | |
1da177e4 LT |
400 | } |
401 | ||
28de7948 | 402 | add: |
1da177e4 LT |
403 | f_pos += nfidlen; |
404 | ||
48d6d8ff | 405 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 406 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 407 | brelse(epos.bh); |
ff116fc8 | 408 | epos.bh = NULL; |
1da177e4 LT |
409 | fibh->soffset -= udf_ext0_offset(dir); |
410 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 411 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 412 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
413 | brelse(fibh->ebh); |
414 | brelse(fibh->sbh); | |
4b11111a MS |
415 | fibh->sbh = fibh->ebh = |
416 | udf_expand_dir_adinicb(dir, &block, err); | |
417 | if (!fibh->sbh) | |
b80697c1 | 418 | goto out_err; |
48d6d8ff | 419 | epos.block = dinfo->i_location; |
ff116fc8 | 420 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
421 | /* Load extent udf_expand_dir_adinicb() has created */ |
422 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
423 | } |
424 | ||
2c948b3f | 425 | /* Entry fits into current block? */ |
cb00ea35 | 426 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
427 | fibh->soffset = fibh->eoffset; |
428 | fibh->eoffset += nfidlen; | |
cb00ea35 | 429 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 430 | brelse(fibh->sbh); |
1da177e4 LT |
431 | fibh->sbh = fibh->ebh; |
432 | } | |
433 | ||
48d6d8ff MS |
434 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
435 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 436 | fi = (struct fileIdentDesc *) |
48d6d8ff | 437 | (dinfo->i_ext.i_data + |
c0b34438 | 438 | fibh->soffset - |
4b11111a | 439 | udf_ext0_offset(dir) + |
48d6d8ff | 440 | dinfo->i_lenEAttr); |
cb00ea35 | 441 | } else { |
4b11111a MS |
442 | block = eloc.logicalBlockNum + |
443 | ((elen - 1) >> | |
444 | dir->i_sb->s_blocksize_bits); | |
445 | fi = (struct fileIdentDesc *) | |
446 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 447 | } |
cb00ea35 | 448 | } else { |
2c948b3f JK |
449 | /* Round up last extent in the file */ |
450 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); | |
451 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
452 | epos.offset -= sizeof(struct short_ad); | |
453 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
454 | epos.offset -= sizeof(struct long_ad); | |
455 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
456 | dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize | |
457 | - 1) & ~(sb->s_blocksize - 1); | |
458 | ||
1da177e4 LT |
459 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
460 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 461 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 462 | brelse(fibh->sbh); |
1da177e4 LT |
463 | fibh->sbh = fibh->ebh; |
464 | } | |
465 | ||
466 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 467 | dir->i_sb->s_blocksize_bits); |
4b11111a | 468 | fibh->ebh = udf_bread(dir, |
af793295 | 469 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
470 | if (!fibh->ebh) |
471 | goto out_err; | |
4651c590 JK |
472 | /* Extents could have been merged, invalidate our position */ |
473 | brelse(epos.bh); | |
474 | epos.bh = NULL; | |
475 | epos.block = dinfo->i_location; | |
476 | epos.offset = udf_file_entry_alloc_offset(dir); | |
1da177e4 | 477 | |
28de7948 | 478 | if (!fibh->soffset) { |
4651c590 JK |
479 | /* Find the freshly allocated block */ |
480 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
481 | (EXT_RECORDED_ALLOCATED >> 30)) | |
482 | ; | |
483 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
28de7948 | 484 | dir->i_sb->s_blocksize_bits); |
3bf25cb4 | 485 | brelse(fibh->sbh); |
1da177e4 LT |
486 | fibh->sbh = fibh->ebh; |
487 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 488 | } else { |
1da177e4 | 489 | fi = (struct fileIdentDesc *) |
4b11111a MS |
490 | (fibh->sbh->b_data + sb->s_blocksize + |
491 | fibh->soffset); | |
1da177e4 LT |
492 | } |
493 | } | |
494 | ||
495 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 496 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a | 497 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
5ca4e4be | 498 | sizeof(struct tag)); |
1da177e4 | 499 | else |
4b11111a | 500 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
5ca4e4be | 501 | sizeof(struct tag)); |
1da177e4 LT |
502 | cfi->fileVersionNum = cpu_to_le16(1); |
503 | cfi->lengthFileIdent = namelen; | |
504 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 505 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 506 | dir->i_size += nfidlen; |
48d6d8ff MS |
507 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
508 | dinfo->i_lenAlloc += nfidlen; | |
2c948b3f JK |
509 | else { |
510 | /* Find the last extent and truncate it to proper size */ | |
511 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
512 | (EXT_RECORDED_ALLOCATED >> 30)) | |
513 | ; | |
514 | elen -= dinfo->i_lenExtents - dir->i_size; | |
515 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
516 | epos.offset -= sizeof(struct short_ad); | |
517 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
518 | epos.offset -= sizeof(struct long_ad); | |
519 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
520 | dinfo->i_lenExtents = dir->i_size; | |
521 | } | |
522 | ||
1da177e4 | 523 | mark_inode_dirty(dir); |
b80697c1 | 524 | goto out_ok; |
cb00ea35 | 525 | } else { |
1da177e4 | 526 | *err = -EIO; |
b80697c1 | 527 | goto out_err; |
1da177e4 | 528 | } |
b80697c1 JK |
529 | |
530 | out_err: | |
531 | fi = NULL; | |
532 | if (fibh->sbh != fibh->ebh) | |
533 | brelse(fibh->ebh); | |
534 | brelse(fibh->sbh); | |
535 | out_ok: | |
536 | brelse(epos.bh); | |
537 | kfree(name); | |
538 | return fi; | |
1da177e4 LT |
539 | } |
540 | ||
541 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
542 | struct udf_fileident_bh *fibh, |
543 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
544 | { |
545 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 546 | |
1da177e4 | 547 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
5ca4e4be | 548 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
28de7948 | 549 | |
1da177e4 LT |
550 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
551 | } | |
552 | ||
cb00ea35 CG |
553 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
554 | struct nameidata *nd) | |
1da177e4 LT |
555 | { |
556 | struct udf_fileident_bh fibh; | |
557 | struct inode *inode; | |
558 | struct fileIdentDesc cfi, *fi; | |
559 | int err; | |
48d6d8ff | 560 | struct udf_inode_info *iinfo; |
1da177e4 | 561 | |
1da177e4 | 562 | inode = udf_new_inode(dir, mode, &err); |
cb00ea35 | 563 | if (!inode) { |
1da177e4 LT |
564 | return err; |
565 | } | |
566 | ||
48d6d8ff MS |
567 | iinfo = UDF_I(inode); |
568 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
569 | inode->i_data.a_ops = &udf_adinicb_aops; |
570 | else | |
571 | inode->i_data.a_ops = &udf_aops; | |
572 | inode->i_op = &udf_file_inode_operations; | |
573 | inode->i_fop = &udf_file_operations; | |
1da177e4 LT |
574 | mark_inode_dirty(inode); |
575 | ||
4b11111a MS |
576 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
577 | if (!fi) { | |
cb00ea35 | 578 | inode->i_nlink--; |
1da177e4 LT |
579 | mark_inode_dirty(inode); |
580 | iput(inode); | |
1da177e4 LT |
581 | return err; |
582 | } | |
583 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 584 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 585 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 586 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 587 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 588 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 589 | mark_inode_dirty(dir); |
1da177e4 | 590 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
591 | brelse(fibh.ebh); |
592 | brelse(fibh.sbh); | |
1da177e4 | 593 | d_instantiate(dentry, inode); |
28de7948 | 594 | |
1da177e4 LT |
595 | return 0; |
596 | } | |
597 | ||
cb00ea35 CG |
598 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
599 | dev_t rdev) | |
1da177e4 | 600 | { |
cb00ea35 | 601 | struct inode *inode; |
1da177e4 LT |
602 | struct udf_fileident_bh fibh; |
603 | struct fileIdentDesc cfi, *fi; | |
604 | int err; | |
48d6d8ff | 605 | struct udf_inode_info *iinfo; |
1da177e4 LT |
606 | |
607 | if (!old_valid_dev(rdev)) | |
608 | return -EINVAL; | |
609 | ||
1da177e4 LT |
610 | err = -EIO; |
611 | inode = udf_new_inode(dir, mode, &err); | |
612 | if (!inode) | |
613 | goto out; | |
614 | ||
48d6d8ff | 615 | iinfo = UDF_I(inode); |
1da177e4 | 616 | init_special_inode(inode, mode, rdev); |
4b11111a MS |
617 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
618 | if (!fi) { | |
cb00ea35 | 619 | inode->i_nlink--; |
1da177e4 LT |
620 | mark_inode_dirty(inode); |
621 | iput(inode); | |
1da177e4 LT |
622 | return err; |
623 | } | |
624 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 625 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 626 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 627 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 628 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 629 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 630 | mark_inode_dirty(dir); |
1da177e4 LT |
631 | mark_inode_dirty(inode); |
632 | ||
633 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
634 | brelse(fibh.ebh); |
635 | brelse(fibh.sbh); | |
1da177e4 LT |
636 | d_instantiate(dentry, inode); |
637 | err = 0; | |
28de7948 CG |
638 | |
639 | out: | |
1da177e4 LT |
640 | return err; |
641 | } | |
642 | ||
cb00ea35 | 643 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 644 | { |
cb00ea35 | 645 | struct inode *inode; |
1da177e4 LT |
646 | struct udf_fileident_bh fibh; |
647 | struct fileIdentDesc cfi, *fi; | |
648 | int err; | |
48d6d8ff MS |
649 | struct udf_inode_info *dinfo = UDF_I(dir); |
650 | struct udf_inode_info *iinfo; | |
1da177e4 | 651 | |
1da177e4 | 652 | err = -EMLINK; |
cb00ea35 | 653 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
654 | goto out; |
655 | ||
656 | err = -EIO; | |
a6c5a034 | 657 | inode = udf_new_inode(dir, S_IFDIR | mode, &err); |
1da177e4 LT |
658 | if (!inode) |
659 | goto out; | |
660 | ||
48d6d8ff | 661 | iinfo = UDF_I(inode); |
1da177e4 LT |
662 | inode->i_op = &udf_dir_inode_operations; |
663 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
664 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
665 | if (!fi) { | |
1da177e4 LT |
666 | inode->i_nlink--; |
667 | mark_inode_dirty(inode); | |
668 | iput(inode); | |
669 | goto out; | |
670 | } | |
671 | inode->i_nlink = 2; | |
672 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 673 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 674 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 675 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
676 | cfi.fileCharacteristics = |
677 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 678 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 679 | brelse(fibh.sbh); |
1da177e4 LT |
680 | mark_inode_dirty(inode); |
681 | ||
4b11111a MS |
682 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
683 | if (!fi) { | |
1da177e4 LT |
684 | inode->i_nlink = 0; |
685 | mark_inode_dirty(inode); | |
686 | iput(inode); | |
687 | goto out; | |
688 | } | |
689 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 690 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 691 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 692 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
693 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
694 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 695 | inc_nlink(dir); |
1da177e4 LT |
696 | mark_inode_dirty(dir); |
697 | d_instantiate(dentry, inode); | |
698 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
699 | brelse(fibh.ebh); |
700 | brelse(fibh.sbh); | |
1da177e4 | 701 | err = 0; |
28de7948 CG |
702 | |
703 | out: | |
1da177e4 LT |
704 | return err; |
705 | } | |
706 | ||
707 | static int empty_dir(struct inode *dir) | |
708 | { | |
709 | struct fileIdentDesc *fi, cfi; | |
710 | struct udf_fileident_bh fibh; | |
711 | loff_t f_pos; | |
af793295 | 712 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 713 | int block; |
5ca4e4be | 714 | struct kernel_lb_addr eloc; |
ff116fc8 | 715 | uint32_t elen; |
60448b1d | 716 | sector_t offset; |
28de7948 | 717 | struct extent_position epos = {}; |
48d6d8ff | 718 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 719 | |
af793295 JK |
720 | f_pos = udf_ext0_offset(dir); |
721 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 722 | |
48d6d8ff | 723 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 724 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 725 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
726 | &epos, &eloc, &elen, &offset) == |
727 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
97e961fd | 728 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 729 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 730 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 731 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 732 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 733 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 734 | } else |
1da177e4 LT |
735 | offset = 0; |
736 | ||
4b11111a MS |
737 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
738 | if (!fibh.sbh) { | |
3bf25cb4 | 739 | brelse(epos.bh); |
1da177e4 LT |
740 | return 0; |
741 | } | |
cb00ea35 | 742 | } else { |
3bf25cb4 | 743 | brelse(epos.bh); |
1da177e4 LT |
744 | return 0; |
745 | } | |
746 | ||
af793295 | 747 | while (f_pos < size) { |
cb00ea35 CG |
748 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
749 | &elen, &offset); | |
cb00ea35 | 750 | if (!fi) { |
1da177e4 | 751 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
752 | brelse(fibh.ebh); |
753 | brelse(fibh.sbh); | |
754 | brelse(epos.bh); | |
1da177e4 LT |
755 | return 0; |
756 | } | |
757 | ||
28de7948 CG |
758 | if (cfi.lengthFileIdent && |
759 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 760 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
761 | brelse(fibh.ebh); |
762 | brelse(fibh.sbh); | |
763 | brelse(epos.bh); | |
1da177e4 LT |
764 | return 0; |
765 | } | |
766 | } | |
28de7948 | 767 | |
1da177e4 | 768 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
769 | brelse(fibh.ebh); |
770 | brelse(fibh.sbh); | |
771 | brelse(epos.bh); | |
28de7948 | 772 | |
1da177e4 LT |
773 | return 1; |
774 | } | |
775 | ||
cb00ea35 | 776 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
777 | { |
778 | int retval; | |
cb00ea35 | 779 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
780 | struct udf_fileident_bh fibh; |
781 | struct fileIdentDesc *fi, cfi; | |
5ca4e4be | 782 | struct kernel_lb_addr tloc; |
1da177e4 LT |
783 | |
784 | retval = -ENOENT; | |
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); | |
97e961fd | 791 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
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 | return retval; |
817 | } | |
818 | ||
cb00ea35 | 819 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
820 | { |
821 | int retval; | |
cb00ea35 | 822 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
823 | struct udf_fileident_bh fibh; |
824 | struct fileIdentDesc *fi; | |
825 | struct fileIdentDesc cfi; | |
5ca4e4be | 826 | struct kernel_lb_addr tloc; |
1da177e4 LT |
827 | |
828 | retval = -ENOENT; | |
9fbb76ce | 829 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
830 | if (!fi) |
831 | goto out; | |
832 | ||
833 | retval = -EIO; | |
834 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 835 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
836 | goto end_unlink; |
837 | ||
cb00ea35 | 838 | if (!inode->i_nlink) { |
1da177e4 | 839 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 840 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
841 | inode->i_nlink = 1; |
842 | } | |
843 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
844 | if (retval) | |
845 | goto end_unlink; | |
846 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
847 | mark_inode_dirty(dir); | |
9a53c3a7 | 848 | inode_dec_link_count(inode); |
1da177e4 LT |
849 | inode->i_ctime = dir->i_ctime; |
850 | retval = 0; | |
851 | ||
28de7948 | 852 | end_unlink: |
1da177e4 | 853 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
854 | brelse(fibh.ebh); |
855 | brelse(fibh.sbh); | |
28de7948 CG |
856 | |
857 | out: | |
1da177e4 LT |
858 | return retval; |
859 | } | |
860 | ||
cb00ea35 CG |
861 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
862 | const char *symname) | |
1da177e4 | 863 | { |
cb00ea35 | 864 | struct inode *inode; |
1da177e4 | 865 | struct pathComponent *pc; |
391e8bbd | 866 | const char *compstart; |
1da177e4 | 867 | struct udf_fileident_bh fibh; |
28de7948 | 868 | struct extent_position epos = {}; |
1da177e4 LT |
869 | int eoffset, elen = 0; |
870 | struct fileIdentDesc *fi; | |
871 | struct fileIdentDesc cfi; | |
391e8bbd | 872 | uint8_t *ea; |
1da177e4 LT |
873 | int err; |
874 | int block; | |
391e8bbd | 875 | unsigned char *name = NULL; |
1da177e4 | 876 | int namelen; |
48d6d8ff | 877 | struct udf_inode_info *iinfo; |
d664b6af | 878 | struct super_block *sb = dir->i_sb; |
1da177e4 | 879 | |
a6c5a034 | 880 | inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err); |
4b11111a | 881 | if (!inode) |
1da177e4 LT |
882 | goto out; |
883 | ||
4d0fb621 AIB |
884 | iinfo = UDF_I(inode); |
885 | down_write(&iinfo->i_data_sem); | |
b80697c1 JK |
886 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
887 | if (!name) { | |
888 | err = -ENOMEM; | |
889 | goto out_no_entry; | |
890 | } | |
891 | ||
1da177e4 | 892 | inode->i_data.a_ops = &udf_symlink_aops; |
c15d0fc0 | 893 | inode->i_op = &udf_symlink_inode_operations; |
1da177e4 | 894 | |
48d6d8ff | 895 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
5ca4e4be | 896 | struct kernel_lb_addr eloc; |
78e917d5 | 897 | uint32_t bsize; |
1da177e4 | 898 | |
d664b6af | 899 | block = udf_new_block(sb, inode, |
48d6d8ff MS |
900 | iinfo->i_location.partitionReferenceNum, |
901 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
902 | if (!block) |
903 | goto out_no_entry; | |
48d6d8ff | 904 | epos.block = iinfo->i_location; |
ff116fc8 JK |
905 | epos.offset = udf_file_entry_alloc_offset(inode); |
906 | epos.bh = NULL; | |
1da177e4 | 907 | eloc.logicalBlockNum = block; |
4b11111a | 908 | eloc.partitionReferenceNum = |
48d6d8ff | 909 | iinfo->i_location.partitionReferenceNum; |
d664b6af | 910 | bsize = sb->s_blocksize; |
78e917d5 | 911 | iinfo->i_lenExtents = bsize; |
97e961fd | 912 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
3bf25cb4 | 913 | brelse(epos.bh); |
1da177e4 | 914 | |
d664b6af | 915 | block = udf_get_pblock(sb, block, |
48d6d8ff | 916 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 917 | 0); |
d664b6af | 918 | epos.bh = udf_tgetblk(sb, block); |
ff116fc8 | 919 | lock_buffer(epos.bh); |
d664b6af | 920 | memset(epos.bh->b_data, 0x00, bsize); |
ff116fc8 JK |
921 | set_buffer_uptodate(epos.bh); |
922 | unlock_buffer(epos.bh); | |
923 | mark_buffer_dirty_inode(epos.bh, inode); | |
924 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
925 | } else |
926 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 | 927 | |
d664b6af | 928 | eoffset = sb->s_blocksize - udf_ext0_offset(inode); |
1da177e4 LT |
929 | pc = (struct pathComponent *)ea; |
930 | ||
cb00ea35 CG |
931 | if (*symname == '/') { |
932 | do { | |
1da177e4 LT |
933 | symname++; |
934 | } while (*symname == '/'); | |
935 | ||
936 | pc->componentType = 1; | |
937 | pc->lengthComponentIdent = 0; | |
938 | pc->componentFileVersionNum = 0; | |
1da177e4 LT |
939 | elen += sizeof(struct pathComponent); |
940 | } | |
941 | ||
942 | err = -ENAMETOOLONG; | |
943 | ||
cb00ea35 | 944 | while (*symname) { |
1da177e4 LT |
945 | if (elen + sizeof(struct pathComponent) > eoffset) |
946 | goto out_no_entry; | |
947 | ||
948 | pc = (struct pathComponent *)(ea + elen); | |
949 | ||
391e8bbd | 950 | compstart = symname; |
1da177e4 | 951 | |
cb00ea35 | 952 | do { |
1da177e4 LT |
953 | symname++; |
954 | } while (*symname && *symname != '/'); | |
955 | ||
956 | pc->componentType = 5; | |
957 | pc->lengthComponentIdent = 0; | |
958 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
959 | if (compstart[0] == '.') { |
960 | if ((symname - compstart) == 1) | |
1da177e4 | 961 | pc->componentType = 4; |
4b11111a MS |
962 | else if ((symname - compstart) == 2 && |
963 | compstart[1] == '.') | |
1da177e4 LT |
964 | pc->componentType = 3; |
965 | } | |
966 | ||
cb00ea35 | 967 | if (pc->componentType == 5) { |
d664b6af | 968 | namelen = udf_put_filename(sb, compstart, name, |
28de7948 CG |
969 | symname - compstart); |
970 | if (!namelen) | |
1da177e4 LT |
971 | goto out_no_entry; |
972 | ||
4b11111a MS |
973 | if (elen + sizeof(struct pathComponent) + namelen > |
974 | eoffset) | |
1da177e4 LT |
975 | goto out_no_entry; |
976 | else | |
977 | pc->lengthComponentIdent = namelen; | |
978 | ||
979 | memcpy(pc->componentIdent, name, namelen); | |
980 | } | |
981 | ||
982 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
983 | ||
cb00ea35 CG |
984 | if (*symname) { |
985 | do { | |
1da177e4 LT |
986 | symname++; |
987 | } while (*symname == '/'); | |
988 | } | |
989 | } | |
990 | ||
3bf25cb4 | 991 | brelse(epos.bh); |
1da177e4 | 992 | inode->i_size = elen; |
48d6d8ff MS |
993 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
994 | iinfo->i_lenAlloc = inode->i_size; | |
2c948b3f JK |
995 | else |
996 | udf_truncate_tail_extent(inode); | |
1da177e4 LT |
997 | mark_inode_dirty(inode); |
998 | ||
4b11111a MS |
999 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1000 | if (!fi) | |
1da177e4 | 1001 | goto out_no_entry; |
d664b6af | 1002 | cfi.icb.extLength = cpu_to_le32(sb->s_blocksize); |
48d6d8ff | 1003 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
d664b6af | 1004 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
28de7948 | 1005 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
d664b6af | 1006 | cpu_to_le32(lvid_get_unique_id(sb)); |
1da177e4 LT |
1007 | } |
1008 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1009 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1010 | mark_inode_dirty(dir); |
4d0fb621 | 1011 | up_write(&iinfo->i_data_sem); |
1da177e4 | 1012 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1013 | brelse(fibh.ebh); |
1014 | brelse(fibh.sbh); | |
1da177e4 LT |
1015 | d_instantiate(dentry, inode); |
1016 | err = 0; | |
1017 | ||
28de7948 | 1018 | out: |
b80697c1 | 1019 | kfree(name); |
1da177e4 LT |
1020 | return err; |
1021 | ||
28de7948 | 1022 | out_no_entry: |
4d0fb621 | 1023 | up_write(&iinfo->i_data_sem); |
9a53c3a7 | 1024 | inode_dec_link_count(inode); |
1da177e4 LT |
1025 | iput(inode); |
1026 | goto out; | |
1027 | } | |
1028 | ||
cb00ea35 CG |
1029 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1030 | struct dentry *dentry) | |
1da177e4 LT |
1031 | { |
1032 | struct inode *inode = old_dentry->d_inode; | |
1033 | struct udf_fileident_bh fibh; | |
1034 | struct fileIdentDesc cfi, *fi; | |
1035 | int err; | |
1036 | ||
cb00ea35 | 1037 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1038 | return -EMLINK; |
1039 | } | |
1040 | ||
4b11111a MS |
1041 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1042 | if (!fi) { | |
1da177e4 LT |
1043 | return err; |
1044 | } | |
1045 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1046 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
d664b6af | 1047 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
28de7948 | 1048 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
d664b6af | 1049 | cpu_to_le32(lvid_get_unique_id(inode->i_sb)); |
1da177e4 LT |
1050 | } |
1051 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1052 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1053 | mark_inode_dirty(dir); |
28de7948 | 1054 | |
1da177e4 | 1055 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1056 | brelse(fibh.ebh); |
1057 | brelse(fibh.sbh); | |
d8c76e6f | 1058 | inc_nlink(inode); |
1da177e4 LT |
1059 | inode->i_ctime = current_fs_time(inode->i_sb); |
1060 | mark_inode_dirty(inode); | |
7de9c6ee | 1061 | ihold(inode); |
1da177e4 | 1062 | d_instantiate(dentry, inode); |
28de7948 | 1063 | |
1da177e4 LT |
1064 | return 0; |
1065 | } | |
1066 | ||
1067 | /* Anybody can rename anything with this: the permission checks are left to the | |
1068 | * higher-level routines. | |
1069 | */ | |
cb00ea35 CG |
1070 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1071 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1072 | { |
cb00ea35 CG |
1073 | struct inode *old_inode = old_dentry->d_inode; |
1074 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1075 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1076 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1077 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1078 | struct buffer_head *dir_bh = NULL; |
1079 | int retval = -ENOENT; | |
5ca4e4be | 1080 | struct kernel_lb_addr tloc; |
48d6d8ff | 1081 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 | 1082 | |
9fbb76ce | 1083 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
4b11111a | 1084 | if (ofi) { |
1da177e4 | 1085 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1086 | brelse(ofibh.ebh); |
1087 | brelse(ofibh.sbh); | |
1da177e4 LT |
1088 | } |
1089 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
97e961fd | 1090 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
cb00ea35 | 1091 | != old_inode->i_ino) |
1da177e4 LT |
1092 | goto end_rename; |
1093 | ||
9fbb76ce | 1094 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
cb00ea35 CG |
1095 | if (nfi) { |
1096 | if (!new_inode) { | |
1da177e4 | 1097 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1098 | brelse(nfibh.ebh); |
1099 | brelse(nfibh.sbh); | |
1da177e4 LT |
1100 | nfi = NULL; |
1101 | } | |
1102 | } | |
cb00ea35 | 1103 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1104 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1105 | |
cb00ea35 | 1106 | if (new_inode) { |
1da177e4 LT |
1107 | retval = -ENOTEMPTY; |
1108 | if (!empty_dir(new_inode)) | |
1109 | goto end_rename; | |
1110 | } | |
1111 | retval = -EIO; | |
48d6d8ff | 1112 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1113 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1114 | old_iinfo->i_ext.i_data - |
1115 | (old_iinfo->i_efe ? | |
4b11111a MS |
1116 | sizeof(struct extendedFileEntry) : |
1117 | sizeof(struct fileEntry)), | |
1118 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1119 | } else { |
1da177e4 LT |
1120 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1121 | if (!dir_bh) | |
1122 | goto end_rename; | |
4b11111a MS |
1123 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1124 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1125 | } |
1126 | if (!dir_fi) | |
1127 | goto end_rename; | |
1128 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
97e961fd | 1129 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
4b11111a | 1130 | old_dir->i_ino) |
1da177e4 LT |
1131 | goto end_rename; |
1132 | ||
1133 | retval = -EMLINK; | |
4b11111a MS |
1134 | if (!new_inode && |
1135 | new_dir->i_nlink >= | |
1136 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1137 | goto end_rename; |
1138 | } | |
cb00ea35 | 1139 | if (!nfi) { |
4b11111a MS |
1140 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1141 | &retval); | |
1da177e4 LT |
1142 | if (!nfi) |
1143 | goto end_rename; | |
1144 | } | |
1145 | ||
1146 | /* | |
1147 | * Like most other Unix systems, set the ctime for inodes on a | |
1148 | * rename. | |
1149 | */ | |
1150 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1151 | mark_inode_dirty(old_inode); | |
1152 | ||
1153 | /* | |
1154 | * ok, that's it | |
1155 | */ | |
1156 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1157 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
5ca4e4be | 1158 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
1da177e4 LT |
1159 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
1160 | ||
1161 | /* The old fid may have moved - find it again */ | |
9fbb76ce | 1162 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
1da177e4 LT |
1163 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
1164 | ||
cb00ea35 | 1165 | if (new_inode) { |
1da177e4 | 1166 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1167 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1168 | } |
1169 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1170 | mark_inode_dirty(old_dir); | |
1171 | ||
cb00ea35 | 1172 | if (dir_fi) { |
c0b34438 | 1173 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1174 | udf_update_tag((char *)dir_fi, |
1175 | (sizeof(struct fileIdentDesc) + | |
1176 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1177 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1178 | mark_inode_dirty(old_inode); |
4b11111a | 1179 | else |
1da177e4 | 1180 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1181 | |
9a53c3a7 | 1182 | inode_dec_link_count(old_dir); |
4b11111a | 1183 | if (new_inode) |
9a53c3a7 | 1184 | inode_dec_link_count(new_inode); |
4b11111a | 1185 | else { |
d8c76e6f | 1186 | inc_nlink(new_dir); |
1da177e4 LT |
1187 | mark_inode_dirty(new_dir); |
1188 | } | |
1189 | } | |
1190 | ||
cb00ea35 | 1191 | if (ofi) { |
1da177e4 | 1192 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1193 | brelse(ofibh.ebh); |
1194 | brelse(ofibh.sbh); | |
1da177e4 LT |
1195 | } |
1196 | ||
1197 | retval = 0; | |
1198 | ||
28de7948 | 1199 | end_rename: |
3bf25cb4 | 1200 | brelse(dir_bh); |
cb00ea35 | 1201 | if (nfi) { |
1da177e4 | 1202 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1203 | brelse(nfibh.ebh); |
1204 | brelse(nfibh.sbh); | |
1da177e4 | 1205 | } |
28de7948 | 1206 | |
1da177e4 LT |
1207 | return retval; |
1208 | } | |
1209 | ||
221e583a RR |
1210 | static struct dentry *udf_get_parent(struct dentry *child) |
1211 | { | |
97e961fd | 1212 | struct kernel_lb_addr tloc; |
221e583a | 1213 | struct inode *inode = NULL; |
9fbb76ce | 1214 | struct qstr dotdot = {.name = "..", .len = 2}; |
221e583a RR |
1215 | struct fileIdentDesc cfi; |
1216 | struct udf_fileident_bh fibh; | |
1217 | ||
221e583a RR |
1218 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) |
1219 | goto out_unlock; | |
1220 | ||
1221 | if (fibh.sbh != fibh.ebh) | |
1222 | brelse(fibh.ebh); | |
1223 | brelse(fibh.sbh); | |
1224 | ||
97e961fd PE |
1225 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
1226 | inode = udf_iget(child->d_inode->i_sb, &tloc); | |
221e583a RR |
1227 | if (!inode) |
1228 | goto out_unlock; | |
221e583a | 1229 | |
44003728 | 1230 | return d_obtain_alias(inode); |
221e583a | 1231 | out_unlock: |
221e583a RR |
1232 | return ERR_PTR(-EACCES); |
1233 | } | |
1234 | ||
1235 | ||
1236 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1237 | u16 partref, __u32 generation) | |
1238 | { | |
1239 | struct inode *inode; | |
5ca4e4be | 1240 | struct kernel_lb_addr loc; |
221e583a RR |
1241 | |
1242 | if (block == 0) | |
1243 | return ERR_PTR(-ESTALE); | |
1244 | ||
1245 | loc.logicalBlockNum = block; | |
1246 | loc.partitionReferenceNum = partref; | |
97e961fd | 1247 | inode = udf_iget(sb, &loc); |
221e583a RR |
1248 | |
1249 | if (inode == NULL) | |
1250 | return ERR_PTR(-ENOMEM); | |
1251 | ||
1252 | if (generation && inode->i_generation != generation) { | |
1253 | iput(inode); | |
1254 | return ERR_PTR(-ESTALE); | |
1255 | } | |
44003728 | 1256 | return d_obtain_alias(inode); |
221e583a RR |
1257 | } |
1258 | ||
1259 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1260 | struct fid *fid, int fh_len, int fh_type) | |
1261 | { | |
1262 | if ((fh_len != 3 && fh_len != 5) || | |
1263 | (fh_type != FILEID_UDF_WITH_PARENT && | |
1264 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1265 | return NULL; | |
1266 | ||
1267 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1268 | fid->udf.generation); | |
1269 | } | |
1270 | ||
1271 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1272 | struct fid *fid, int fh_len, int fh_type) | |
1273 | { | |
1274 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) | |
1275 | return NULL; | |
1276 | ||
1277 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1278 | fid->udf.parent_partref, | |
1279 | fid->udf.parent_generation); | |
1280 | } | |
1281 | static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, | |
1282 | int connectable) | |
1283 | { | |
1284 | int len = *lenp; | |
1285 | struct inode *inode = de->d_inode; | |
5ca4e4be | 1286 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
221e583a RR |
1287 | struct fid *fid = (struct fid *)fh; |
1288 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1289 | ||
1290 | if (len < 3 || (connectable && len < 5)) | |
1291 | return 255; | |
1292 | ||
1293 | *lenp = 3; | |
1294 | fid->udf.block = location.logicalBlockNum; | |
1295 | fid->udf.partref = location.partitionReferenceNum; | |
1296 | fid->udf.generation = inode->i_generation; | |
1297 | ||
1298 | if (connectable && !S_ISDIR(inode->i_mode)) { | |
1299 | spin_lock(&de->d_lock); | |
1300 | inode = de->d_parent->d_inode; | |
1301 | location = UDF_I(inode)->i_location; | |
1302 | fid->udf.parent_block = location.logicalBlockNum; | |
1303 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1304 | fid->udf.parent_generation = inode->i_generation; | |
1305 | spin_unlock(&de->d_lock); | |
1306 | *lenp = 5; | |
1307 | type = FILEID_UDF_WITH_PARENT; | |
1308 | } | |
1309 | ||
1310 | return type; | |
1311 | } | |
1312 | ||
1313 | const struct export_operations udf_export_ops = { | |
1314 | .encode_fh = udf_encode_fh, | |
1315 | .fh_to_dentry = udf_fh_to_dentry, | |
1316 | .fh_to_parent = udf_fh_to_parent, | |
1317 | .get_parent = udf_get_parent, | |
1318 | }; | |
1319 | ||
c5ef1c42 | 1320 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1321 | .lookup = udf_lookup, |
1322 | .create = udf_create, | |
1323 | .link = udf_link, | |
1324 | .unlink = udf_unlink, | |
1325 | .symlink = udf_symlink, | |
1326 | .mkdir = udf_mkdir, | |
1327 | .rmdir = udf_rmdir, | |
1328 | .mknod = udf_mknod, | |
1329 | .rename = udf_rename, | |
1da177e4 | 1330 | }; |
c15d0fc0 DM |
1331 | const struct inode_operations udf_symlink_inode_operations = { |
1332 | .readlink = generic_readlink, | |
1333 | .follow_link = page_follow_link_light, | |
1334 | .put_link = page_put_link, | |
c15d0fc0 | 1335 | }; |