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> | |
e8edc6e0 | 30 | #include <linux/sched.h> |
f845fced | 31 | #include <linux/crc-itu-t.h> |
221e583a | 32 | #include <linux/exportfs.h> |
1da177e4 | 33 | |
391e8bbd AV |
34 | static inline int udf_match(int len1, const unsigned char *name1, int len2, |
35 | const unsigned char *name2) | |
1da177e4 LT |
36 | { |
37 | if (len1 != len2) | |
38 | return 0; | |
28de7948 | 39 | |
1da177e4 LT |
40 | return !memcmp(name1, name2, len1); |
41 | } | |
42 | ||
43 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 | 44 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
4b11111a | 45 | uint8_t *impuse, uint8_t *fileident) |
1da177e4 | 46 | { |
5ca4e4be | 47 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag); |
1da177e4 | 48 | uint16_t crc; |
1da177e4 LT |
49 | int offset; |
50 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
51 | uint8_t lfi = cfi->lengthFileIdent; | |
52 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
28de7948 | 53 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
54 | int adinicb = 0; |
55 | ||
c0b34438 | 56 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 LT |
57 | adinicb = 1; |
58 | ||
59 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
60 | ||
cb00ea35 | 61 | if (impuse) { |
28de7948 CG |
62 | if (adinicb || (offset + liu < 0)) { |
63 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
64 | } else if (offset >= 0) { | |
1da177e4 | 65 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
28de7948 CG |
66 | } else { |
67 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
4b11111a MS |
68 | memcpy(fibh->ebh->b_data, impuse - offset, |
69 | liu + offset); | |
1da177e4 LT |
70 | } |
71 | } | |
72 | ||
73 | offset += liu; | |
74 | ||
cb00ea35 | 75 | if (fileident) { |
28de7948 CG |
76 | if (adinicb || (offset + lfi < 0)) { |
77 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
78 | } else if (offset >= 0) { | |
1da177e4 | 79 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 80 | } else { |
4b11111a MS |
81 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
82 | -offset); | |
83 | memcpy(fibh->ebh->b_data, fileident - offset, | |
84 | lfi + offset); | |
1da177e4 LT |
85 | } |
86 | } | |
87 | ||
88 | offset += lfi; | |
89 | ||
28de7948 CG |
90 | if (adinicb || (offset + padlen < 0)) { |
91 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
92 | } else if (offset >= 0) { | |
1da177e4 | 93 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
94 | } else { |
95 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
96 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
97 | } | |
98 | ||
5ca4e4be PE |
99 | crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), |
100 | sizeof(struct fileIdentDesc) - sizeof(struct tag)); | |
28de7948 CG |
101 | |
102 | if (fibh->sbh == fibh->ebh) { | |
f845fced | 103 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
5ca4e4be | 104 | crclen + sizeof(struct tag) - |
f845fced | 105 | sizeof(struct fileIdentDesc)); |
28de7948 | 106 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
f845fced | 107 | crc = crc_itu_t(crc, fibh->ebh->b_data + |
4b11111a MS |
108 | sizeof(struct fileIdentDesc) + |
109 | fibh->soffset, | |
5ca4e4be | 110 | crclen + sizeof(struct tag) - |
f845fced | 111 | sizeof(struct fileIdentDesc)); |
28de7948 | 112 | } else { |
f845fced BC |
113 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
114 | -fibh->soffset - sizeof(struct fileIdentDesc)); | |
115 | crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); | |
1da177e4 LT |
116 | } |
117 | ||
118 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
119 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
3f2587bb | 120 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
1da177e4 | 121 | |
28de7948 | 122 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
4b11111a MS |
123 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
124 | sizeof(struct fileIdentDesc)); | |
28de7948 CG |
125 | } else { |
126 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
127 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 128 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
129 | } |
130 | ||
28de7948 | 131 | if (adinicb) { |
1da177e4 | 132 | mark_inode_dirty(inode); |
28de7948 | 133 | } else { |
1da177e4 LT |
134 | if (fibh->sbh != fibh->ebh) |
135 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
136 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
137 | } | |
138 | return 0; | |
139 | } | |
140 | ||
231473f6 FF |
141 | /** |
142 | * udf_find_entry - find entry in given directory. | |
143 | * | |
144 | * @dir: directory inode to search in | |
145 | * @child: qstr of the name | |
146 | * @fibh: buffer head / inode with file identifier descriptor we found | |
147 | * @cfi: found file identifier descriptor with given name | |
148 | * | |
149 | * This function searches in the directory @dir for a file name @child. When | |
150 | * found, @fibh points to the buffer head(s) (bh is NULL for in ICB | |
151 | * directories) containing the file identifier descriptor (FID). In that case | |
152 | * the function returns pointer to the FID in the buffer or inode - but note | |
153 | * that FID may be split among two buffers (blocks) so accessing it via that | |
154 | * pointer isn't easily possible. This pointer can be used only as an iterator | |
155 | * for other directory manipulation functions. For inspection of the FID @cfi | |
156 | * can be used - the found FID is copied there. | |
157 | * | |
158 | * Returns pointer to FID, NULL when nothing found, or error code. | |
159 | */ | |
cb00ea35 | 160 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
391e8bbd | 161 | const struct qstr *child, |
cb00ea35 CG |
162 | struct udf_fileident_bh *fibh, |
163 | struct fileIdentDesc *cfi) | |
1da177e4 | 164 | { |
cb00ea35 | 165 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
166 | loff_t f_pos; |
167 | int block, flen; | |
391e8bbd AV |
168 | unsigned char *fname = NULL; |
169 | unsigned char *nameptr; | |
1da177e4 LT |
170 | uint8_t lfi; |
171 | uint16_t liu; | |
ec471dc4 | 172 | loff_t size; |
5ca4e4be | 173 | struct kernel_lb_addr eloc; |
ff116fc8 | 174 | uint32_t elen; |
60448b1d | 175 | sector_t offset; |
28de7948 | 176 | struct extent_position epos = {}; |
48d6d8ff | 177 | struct udf_inode_info *dinfo = UDF_I(dir); |
9fbb76ce AV |
178 | int isdotdot = child->len == 2 && |
179 | child->name[0] == '.' && child->name[1] == '.'; | |
3ee3039c | 180 | struct super_block *sb = dir->i_sb; |
1da177e4 | 181 | |
af793295 JK |
182 | size = udf_ext0_offset(dir) + dir->i_size; |
183 | f_pos = udf_ext0_offset(dir); | |
1da177e4 | 184 | |
b80697c1 | 185 | fibh->sbh = fibh->ebh = NULL; |
3ee3039c | 186 | fibh->soffset = fibh->eoffset = f_pos & (sb->s_blocksize - 1); |
b80697c1 | 187 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
3ee3039c | 188 | if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos, |
231473f6 FF |
189 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { |
190 | fi = ERR_PTR(-EIO); | |
b80697c1 | 191 | goto out_err; |
231473f6 FF |
192 | } |
193 | ||
3ee3039c JK |
194 | block = udf_get_lb_pblock(sb, &eloc, offset); |
195 | if ((++offset << sb->s_blocksize_bits) < elen) { | |
48d6d8ff | 196 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 197 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 198 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 199 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 200 | } else |
1da177e4 LT |
201 | offset = 0; |
202 | ||
3ee3039c | 203 | fibh->sbh = fibh->ebh = udf_tread(sb, block); |
231473f6 FF |
204 | if (!fibh->sbh) { |
205 | fi = ERR_PTR(-EIO); | |
b80697c1 | 206 | goto out_err; |
231473f6 | 207 | } |
1da177e4 LT |
208 | } |
209 | ||
b80697c1 | 210 | fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
231473f6 FF |
211 | if (!fname) { |
212 | fi = ERR_PTR(-ENOMEM); | |
b80697c1 | 213 | goto out_err; |
231473f6 | 214 | } |
b80697c1 | 215 | |
af793295 | 216 | while (f_pos < size) { |
cb00ea35 CG |
217 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
218 | &elen, &offset); | |
231473f6 FF |
219 | if (!fi) { |
220 | fi = ERR_PTR(-EIO); | |
b80697c1 | 221 | goto out_err; |
231473f6 | 222 | } |
1da177e4 LT |
223 | |
224 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
225 | lfi = cfi->lengthFileIdent; | |
226 | ||
cb00ea35 | 227 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 228 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 229 | } else { |
1da177e4 LT |
230 | int poffset; /* Unpaded ending offset */ |
231 | ||
4b11111a MS |
232 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
233 | liu + lfi; | |
1da177e4 | 234 | |
4b11111a MS |
235 | if (poffset >= lfi) |
236 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
237 | poffset - lfi); | |
238 | else { | |
1da177e4 | 239 | nameptr = fname; |
4b11111a MS |
240 | memcpy(nameptr, fi->fileIdent + liu, |
241 | lfi - poffset); | |
242 | memcpy(nameptr + lfi - poffset, | |
243 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
244 | } |
245 | } | |
246 | ||
cb00ea35 | 247 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
3ee3039c | 248 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) |
1da177e4 LT |
249 | continue; |
250 | } | |
cb00ea35 CG |
251 | |
252 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
3ee3039c | 253 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) |
1da177e4 LT |
254 | continue; |
255 | } | |
256 | ||
221e583a | 257 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
a4264b3f JJ |
258 | isdotdot) |
259 | goto out_ok; | |
221e583a | 260 | |
1da177e4 LT |
261 | if (!lfi) |
262 | continue; | |
263 | ||
3ee3039c | 264 | flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN); |
231473f6 FF |
265 | if (flen < 0) { |
266 | fi = ERR_PTR(flen); | |
267 | goto out_err; | |
268 | } | |
269 | ||
270 | if (udf_match(flen, fname, child->len, child->name)) | |
b80697c1 | 271 | goto out_ok; |
1da177e4 | 272 | } |
28de7948 | 273 | |
b80697c1 | 274 | fi = NULL; |
231473f6 | 275 | out_err: |
1da177e4 | 276 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
277 | brelse(fibh->ebh); |
278 | brelse(fibh->sbh); | |
b80697c1 | 279 | out_ok: |
3bf25cb4 | 280 | brelse(epos.bh); |
b80697c1 | 281 | kfree(fname); |
28de7948 | 282 | |
b80697c1 | 283 | return fi; |
1da177e4 LT |
284 | } |
285 | ||
cb00ea35 | 286 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 287 | unsigned int flags) |
1da177e4 LT |
288 | { |
289 | struct inode *inode = NULL; | |
db9a369e | 290 | struct fileIdentDesc cfi; |
1da177e4 | 291 | struct udf_fileident_bh fibh; |
231473f6 | 292 | struct fileIdentDesc *fi; |
1da177e4 | 293 | |
9fba7056 | 294 | if (dentry->d_name.len > UDF_NAME_LEN) |
1da177e4 LT |
295 | return ERR_PTR(-ENAMETOOLONG); |
296 | ||
1da177e4 LT |
297 | #ifdef UDF_RECOVERY |
298 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 299 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
5ca4e4be | 300 | struct kernel_lb_addr lb = { |
28de7948 | 301 | .logicalBlockNum = 0, |
4b11111a MS |
302 | .partitionReferenceNum = |
303 | simple_strtoul(dentry->d_name.name + 3, | |
304 | NULL, 0), | |
28de7948 | 305 | }; |
1da177e4 | 306 | inode = udf_iget(dir->i_sb, lb); |
6d3d5e86 JK |
307 | if (IS_ERR(inode)) |
308 | return inode; | |
4b11111a | 309 | } else |
28de7948 | 310 | #endif /* UDF_RECOVERY */ |
1da177e4 | 311 | |
231473f6 FF |
312 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
313 | if (IS_ERR(fi)) | |
314 | return ERR_CAST(fi); | |
315 | ||
316 | if (fi) { | |
97e961fd PE |
317 | struct kernel_lb_addr loc; |
318 | ||
1da177e4 | 319 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
320 | brelse(fibh.ebh); |
321 | brelse(fibh.sbh); | |
1da177e4 | 322 | |
97e961fd PE |
323 | loc = lelb_to_cpu(cfi.icb.extLocation); |
324 | inode = udf_iget(dir->i_sb, &loc); | |
6d3d5e86 JK |
325 | if (IS_ERR(inode)) |
326 | return ERR_CAST(inode); | |
1da177e4 | 327 | } |
28de7948 | 328 | |
221e583a | 329 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
330 | } |
331 | ||
cb00ea35 CG |
332 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
333 | struct dentry *dentry, | |
334 | struct udf_fileident_bh *fibh, | |
335 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 336 | { |
6c79e987 | 337 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 338 | struct fileIdentDesc *fi = NULL; |
391e8bbd | 339 | unsigned char *name = NULL; |
1da177e4 LT |
340 | int namelen; |
341 | loff_t f_pos; | |
af793295 | 342 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
343 | int nfidlen; |
344 | uint8_t lfi; | |
345 | uint16_t liu; | |
346 | int block; | |
5ca4e4be | 347 | struct kernel_lb_addr eloc; |
9afadc4b | 348 | uint32_t elen = 0; |
60448b1d | 349 | sector_t offset; |
28de7948 | 350 | struct extent_position epos = {}; |
48d6d8ff | 351 | struct udf_inode_info *dinfo; |
1da177e4 | 352 | |
b80697c1 | 353 | fibh->sbh = fibh->ebh = NULL; |
9fba7056 | 354 | name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS); |
b80697c1 JK |
355 | if (!name) { |
356 | *err = -ENOMEM; | |
357 | goto out_err; | |
358 | } | |
359 | ||
cb00ea35 CG |
360 | if (dentry) { |
361 | if (!dentry->d_name.len) { | |
1da177e4 | 362 | *err = -EINVAL; |
b80697c1 | 363 | goto out_err; |
1da177e4 | 364 | } |
525e2c56 AG |
365 | namelen = udf_put_filename(sb, dentry->d_name.name, |
366 | dentry->d_name.len, | |
9fba7056 | 367 | name, UDF_NAME_LEN_CS0); |
4b11111a | 368 | if (!namelen) { |
1da177e4 | 369 | *err = -ENAMETOOLONG; |
b80697c1 | 370 | goto out_err; |
1da177e4 | 371 | } |
28de7948 | 372 | } else { |
1da177e4 | 373 | namelen = 0; |
28de7948 | 374 | } |
1da177e4 LT |
375 | |
376 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
377 | ||
af793295 | 378 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 379 | |
af793295 | 380 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 381 | dinfo = UDF_I(dir); |
b80697c1 JK |
382 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
383 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
384 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { | |
385 | block = udf_get_lb_pblock(dir->i_sb, | |
97e961fd | 386 | &dinfo->i_location, 0); |
b80697c1 JK |
387 | fibh->soffset = fibh->eoffset = sb->s_blocksize; |
388 | goto add; | |
389 | } | |
97e961fd | 390 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 391 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 392 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 393 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 394 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 395 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 396 | } else |
1da177e4 LT |
397 | offset = 0; |
398 | ||
4b11111a MS |
399 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
400 | if (!fibh->sbh) { | |
1da177e4 | 401 | *err = -EIO; |
b80697c1 | 402 | goto out_err; |
1da177e4 LT |
403 | } |
404 | ||
48d6d8ff | 405 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 LT |
406 | } |
407 | ||
af793295 | 408 | while (f_pos < size) { |
cb00ea35 CG |
409 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
410 | &elen, &offset); | |
1da177e4 | 411 | |
cb00ea35 | 412 | if (!fi) { |
1da177e4 | 413 | *err = -EIO; |
b80697c1 | 414 | goto out_err; |
1da177e4 LT |
415 | } |
416 | ||
417 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
418 | lfi = cfi->lengthFileIdent; | |
419 | ||
cb00ea35 | 420 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
421 | if (((sizeof(struct fileIdentDesc) + |
422 | liu + lfi + 3) & ~3) == nfidlen) { | |
1da177e4 LT |
423 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
424 | cfi->fileVersionNum = cpu_to_le16(1); | |
425 | cfi->fileCharacteristics = 0; | |
426 | cfi->lengthFileIdent = namelen; | |
427 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
428 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
429 | name)) | |
b80697c1 | 430 | goto out_ok; |
4b11111a | 431 | else { |
1da177e4 | 432 | *err = -EIO; |
b80697c1 | 433 | goto out_err; |
1da177e4 LT |
434 | } |
435 | } | |
436 | } | |
1da177e4 LT |
437 | } |
438 | ||
28de7948 | 439 | add: |
1da177e4 LT |
440 | f_pos += nfidlen; |
441 | ||
48d6d8ff | 442 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 443 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 444 | brelse(epos.bh); |
ff116fc8 | 445 | epos.bh = NULL; |
1da177e4 LT |
446 | fibh->soffset -= udf_ext0_offset(dir); |
447 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 448 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 449 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
450 | brelse(fibh->ebh); |
451 | brelse(fibh->sbh); | |
4b11111a MS |
452 | fibh->sbh = fibh->ebh = |
453 | udf_expand_dir_adinicb(dir, &block, err); | |
454 | if (!fibh->sbh) | |
b80697c1 | 455 | goto out_err; |
48d6d8ff | 456 | epos.block = dinfo->i_location; |
ff116fc8 | 457 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
458 | /* Load extent udf_expand_dir_adinicb() has created */ |
459 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
460 | } |
461 | ||
2c948b3f | 462 | /* Entry fits into current block? */ |
cb00ea35 | 463 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
464 | fibh->soffset = fibh->eoffset; |
465 | fibh->eoffset += nfidlen; | |
cb00ea35 | 466 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 467 | brelse(fibh->sbh); |
1da177e4 LT |
468 | fibh->sbh = fibh->ebh; |
469 | } | |
470 | ||
48d6d8ff MS |
471 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
472 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 473 | fi = (struct fileIdentDesc *) |
48d6d8ff | 474 | (dinfo->i_ext.i_data + |
c0b34438 | 475 | fibh->soffset - |
4b11111a | 476 | udf_ext0_offset(dir) + |
48d6d8ff | 477 | dinfo->i_lenEAttr); |
cb00ea35 | 478 | } else { |
4b11111a MS |
479 | block = eloc.logicalBlockNum + |
480 | ((elen - 1) >> | |
481 | dir->i_sb->s_blocksize_bits); | |
482 | fi = (struct fileIdentDesc *) | |
483 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 484 | } |
cb00ea35 | 485 | } else { |
2c948b3f JK |
486 | /* Round up last extent in the file */ |
487 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); | |
488 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
489 | epos.offset -= sizeof(struct short_ad); | |
490 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
491 | epos.offset -= sizeof(struct long_ad); | |
492 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
493 | dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize | |
494 | - 1) & ~(sb->s_blocksize - 1); | |
495 | ||
1da177e4 LT |
496 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
497 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 498 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 499 | brelse(fibh->sbh); |
1da177e4 LT |
500 | fibh->sbh = fibh->ebh; |
501 | } | |
502 | ||
503 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 504 | dir->i_sb->s_blocksize_bits); |
4b11111a | 505 | fibh->ebh = udf_bread(dir, |
af793295 | 506 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
507 | if (!fibh->ebh) |
508 | goto out_err; | |
4651c590 JK |
509 | /* Extents could have been merged, invalidate our position */ |
510 | brelse(epos.bh); | |
511 | epos.bh = NULL; | |
512 | epos.block = dinfo->i_location; | |
513 | epos.offset = udf_file_entry_alloc_offset(dir); | |
1da177e4 | 514 | |
28de7948 | 515 | if (!fibh->soffset) { |
4651c590 JK |
516 | /* Find the freshly allocated block */ |
517 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
518 | (EXT_RECORDED_ALLOCATED >> 30)) | |
519 | ; | |
520 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
28de7948 | 521 | dir->i_sb->s_blocksize_bits); |
3bf25cb4 | 522 | brelse(fibh->sbh); |
1da177e4 LT |
523 | fibh->sbh = fibh->ebh; |
524 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 525 | } else { |
1da177e4 | 526 | fi = (struct fileIdentDesc *) |
4b11111a MS |
527 | (fibh->sbh->b_data + sb->s_blocksize + |
528 | fibh->soffset); | |
1da177e4 LT |
529 | } |
530 | } | |
531 | ||
532 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 533 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a | 534 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
5ca4e4be | 535 | sizeof(struct tag)); |
1da177e4 | 536 | else |
4b11111a | 537 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
5ca4e4be | 538 | sizeof(struct tag)); |
1da177e4 LT |
539 | cfi->fileVersionNum = cpu_to_le16(1); |
540 | cfi->lengthFileIdent = namelen; | |
541 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 542 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 543 | dir->i_size += nfidlen; |
48d6d8ff MS |
544 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
545 | dinfo->i_lenAlloc += nfidlen; | |
2c948b3f JK |
546 | else { |
547 | /* Find the last extent and truncate it to proper size */ | |
548 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
549 | (EXT_RECORDED_ALLOCATED >> 30)) | |
550 | ; | |
551 | elen -= dinfo->i_lenExtents - dir->i_size; | |
552 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
553 | epos.offset -= sizeof(struct short_ad); | |
554 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
555 | epos.offset -= sizeof(struct long_ad); | |
556 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
557 | dinfo->i_lenExtents = dir->i_size; | |
558 | } | |
559 | ||
1da177e4 | 560 | mark_inode_dirty(dir); |
b80697c1 | 561 | goto out_ok; |
cb00ea35 | 562 | } else { |
1da177e4 | 563 | *err = -EIO; |
b80697c1 | 564 | goto out_err; |
1da177e4 | 565 | } |
b80697c1 JK |
566 | |
567 | out_err: | |
568 | fi = NULL; | |
569 | if (fibh->sbh != fibh->ebh) | |
570 | brelse(fibh->ebh); | |
571 | brelse(fibh->sbh); | |
572 | out_ok: | |
573 | brelse(epos.bh); | |
574 | kfree(name); | |
575 | return fi; | |
1da177e4 LT |
576 | } |
577 | ||
578 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
579 | struct udf_fileident_bh *fibh, |
580 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
581 | { |
582 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 583 | |
1da177e4 | 584 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
5ca4e4be | 585 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
28de7948 | 586 | |
1da177e4 LT |
587 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
588 | } | |
589 | ||
d2be51cb | 590 | static int udf_add_nondir(struct dentry *dentry, struct inode *inode) |
1da177e4 | 591 | { |
d2be51cb | 592 | struct udf_inode_info *iinfo = UDF_I(inode); |
2b0143b5 | 593 | struct inode *dir = d_inode(dentry->d_parent); |
1da177e4 | 594 | struct udf_fileident_bh fibh; |
1da177e4 LT |
595 | struct fileIdentDesc cfi, *fi; |
596 | int err; | |
1da177e4 | 597 | |
4b11111a | 598 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
d2be51cb | 599 | if (unlikely(!fi)) { |
6d6b77f1 | 600 | inode_dec_link_count(inode); |
b2315096 | 601 | unlock_new_inode(inode); |
1da177e4 | 602 | iput(inode); |
1da177e4 LT |
603 | return err; |
604 | } | |
605 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 606 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 607 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 608 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 609 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
3adc12e9 JK |
610 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); |
611 | mark_inode_dirty(dir); | |
1da177e4 | 612 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
613 | brelse(fibh.ebh); |
614 | brelse(fibh.sbh); | |
b2315096 | 615 | unlock_new_inode(inode); |
1da177e4 | 616 | d_instantiate(dentry, inode); |
28de7948 | 617 | |
1da177e4 LT |
618 | return 0; |
619 | } | |
620 | ||
d2be51cb AV |
621 | static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
622 | bool excl) | |
623 | { | |
0b93a92b | 624 | struct inode *inode = udf_new_inode(dir, mode); |
d2be51cb | 625 | |
0b93a92b AV |
626 | if (IS_ERR(inode)) |
627 | return PTR_ERR(inode); | |
d2be51cb AV |
628 | |
629 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
630 | inode->i_data.a_ops = &udf_adinicb_aops; | |
631 | else | |
632 | inode->i_data.a_ops = &udf_aops; | |
633 | inode->i_op = &udf_file_inode_operations; | |
634 | inode->i_fop = &udf_file_operations; | |
635 | mark_inode_dirty(inode); | |
636 | ||
637 | return udf_add_nondir(dentry, inode); | |
638 | } | |
639 | ||
656d09df AV |
640 | static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
641 | { | |
0b93a92b | 642 | struct inode *inode = udf_new_inode(dir, mode); |
656d09df | 643 | |
0b93a92b AV |
644 | if (IS_ERR(inode)) |
645 | return PTR_ERR(inode); | |
656d09df | 646 | |
0b93a92b | 647 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
656d09df AV |
648 | inode->i_data.a_ops = &udf_adinicb_aops; |
649 | else | |
650 | inode->i_data.a_ops = &udf_aops; | |
651 | inode->i_op = &udf_file_inode_operations; | |
652 | inode->i_fop = &udf_file_operations; | |
653 | mark_inode_dirty(inode); | |
656d09df | 654 | d_tmpfile(dentry, inode); |
b2315096 | 655 | unlock_new_inode(inode); |
656d09df AV |
656 | return 0; |
657 | } | |
658 | ||
1a67aafb | 659 | static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
cb00ea35 | 660 | dev_t rdev) |
1da177e4 | 661 | { |
cb00ea35 | 662 | struct inode *inode; |
1da177e4 LT |
663 | |
664 | if (!old_valid_dev(rdev)) | |
665 | return -EINVAL; | |
666 | ||
0b93a92b AV |
667 | inode = udf_new_inode(dir, mode); |
668 | if (IS_ERR(inode)) | |
669 | return PTR_ERR(inode); | |
28de7948 | 670 | |
d2be51cb AV |
671 | init_special_inode(inode, mode, rdev); |
672 | return udf_add_nondir(dentry, inode); | |
1da177e4 LT |
673 | } |
674 | ||
18bb1db3 | 675 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
1da177e4 | 676 | { |
cb00ea35 | 677 | struct inode *inode; |
1da177e4 LT |
678 | struct udf_fileident_bh fibh; |
679 | struct fileIdentDesc cfi, *fi; | |
680 | int err; | |
48d6d8ff MS |
681 | struct udf_inode_info *dinfo = UDF_I(dir); |
682 | struct udf_inode_info *iinfo; | |
1da177e4 | 683 | |
0b93a92b AV |
684 | inode = udf_new_inode(dir, S_IFDIR | mode); |
685 | if (IS_ERR(inode)) | |
686 | return PTR_ERR(inode); | |
1da177e4 | 687 | |
48d6d8ff | 688 | iinfo = UDF_I(inode); |
1da177e4 LT |
689 | inode->i_op = &udf_dir_inode_operations; |
690 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
691 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
692 | if (!fi) { | |
6d6b77f1 | 693 | inode_dec_link_count(inode); |
b2315096 | 694 | unlock_new_inode(inode); |
1da177e4 LT |
695 | iput(inode); |
696 | goto out; | |
697 | } | |
bfe86848 | 698 | set_nlink(inode, 2); |
1da177e4 | 699 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
48d6d8ff | 700 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 701 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 702 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
703 | cfi.fileCharacteristics = |
704 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 705 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 706 | brelse(fibh.sbh); |
1da177e4 LT |
707 | mark_inode_dirty(inode); |
708 | ||
4b11111a MS |
709 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
710 | if (!fi) { | |
6d6b77f1 | 711 | clear_nlink(inode); |
1da177e4 | 712 | mark_inode_dirty(inode); |
b2315096 | 713 | unlock_new_inode(inode); |
1da177e4 LT |
714 | iput(inode); |
715 | goto out; | |
716 | } | |
717 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 718 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 719 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 720 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
721 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
722 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 723 | inc_nlink(dir); |
3adc12e9 | 724 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); |
1da177e4 | 725 | mark_inode_dirty(dir); |
b2315096 | 726 | unlock_new_inode(inode); |
1da177e4 LT |
727 | d_instantiate(dentry, inode); |
728 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
729 | brelse(fibh.ebh); |
730 | brelse(fibh.sbh); | |
1da177e4 | 731 | err = 0; |
28de7948 CG |
732 | |
733 | out: | |
1da177e4 LT |
734 | return err; |
735 | } | |
736 | ||
737 | static int empty_dir(struct inode *dir) | |
738 | { | |
739 | struct fileIdentDesc *fi, cfi; | |
740 | struct udf_fileident_bh fibh; | |
741 | loff_t f_pos; | |
af793295 | 742 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 743 | int block; |
5ca4e4be | 744 | struct kernel_lb_addr eloc; |
ff116fc8 | 745 | uint32_t elen; |
60448b1d | 746 | sector_t offset; |
28de7948 | 747 | struct extent_position epos = {}; |
48d6d8ff | 748 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 749 | |
af793295 JK |
750 | f_pos = udf_ext0_offset(dir); |
751 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 752 | |
48d6d8ff | 753 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 754 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 755 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
756 | &epos, &eloc, &elen, &offset) == |
757 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
97e961fd | 758 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 759 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 760 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 761 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 762 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 763 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 764 | } else |
1da177e4 LT |
765 | offset = 0; |
766 | ||
4b11111a MS |
767 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
768 | if (!fibh.sbh) { | |
3bf25cb4 | 769 | brelse(epos.bh); |
1da177e4 LT |
770 | return 0; |
771 | } | |
cb00ea35 | 772 | } else { |
3bf25cb4 | 773 | brelse(epos.bh); |
1da177e4 LT |
774 | return 0; |
775 | } | |
776 | ||
af793295 | 777 | while (f_pos < size) { |
cb00ea35 CG |
778 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
779 | &elen, &offset); | |
cb00ea35 | 780 | if (!fi) { |
1da177e4 | 781 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
782 | brelse(fibh.ebh); |
783 | brelse(fibh.sbh); | |
784 | brelse(epos.bh); | |
1da177e4 LT |
785 | return 0; |
786 | } | |
787 | ||
28de7948 CG |
788 | if (cfi.lengthFileIdent && |
789 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 790 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
791 | brelse(fibh.ebh); |
792 | brelse(fibh.sbh); | |
793 | brelse(epos.bh); | |
1da177e4 LT |
794 | return 0; |
795 | } | |
796 | } | |
28de7948 | 797 | |
1da177e4 | 798 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
799 | brelse(fibh.ebh); |
800 | brelse(fibh.sbh); | |
801 | brelse(epos.bh); | |
28de7948 | 802 | |
1da177e4 LT |
803 | return 1; |
804 | } | |
805 | ||
cb00ea35 | 806 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
807 | { |
808 | int retval; | |
2b0143b5 | 809 | struct inode *inode = d_inode(dentry); |
1da177e4 LT |
810 | struct udf_fileident_bh fibh; |
811 | struct fileIdentDesc *fi, cfi; | |
5ca4e4be | 812 | struct kernel_lb_addr tloc; |
1da177e4 LT |
813 | |
814 | retval = -ENOENT; | |
9fbb76ce | 815 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
231473f6 FF |
816 | if (IS_ERR_OR_NULL(fi)) { |
817 | if (fi) | |
818 | retval = PTR_ERR(fi); | |
1da177e4 | 819 | goto out; |
231473f6 | 820 | } |
1da177e4 LT |
821 | |
822 | retval = -EIO; | |
823 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 824 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
825 | goto end_rmdir; |
826 | retval = -ENOTEMPTY; | |
827 | if (!empty_dir(inode)) | |
828 | goto end_rmdir; | |
829 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
830 | if (retval) | |
831 | goto end_rmdir; | |
832 | if (inode->i_nlink != 2) | |
a40ecd7b JP |
833 | udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n", |
834 | inode->i_nlink); | |
ce71ec36 | 835 | clear_nlink(inode); |
1da177e4 | 836 | inode->i_size = 0; |
c007c06e | 837 | inode_dec_link_count(dir); |
4b11111a MS |
838 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
839 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
840 | mark_inode_dirty(dir); |
841 | ||
28de7948 | 842 | end_rmdir: |
1da177e4 | 843 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
844 | brelse(fibh.ebh); |
845 | brelse(fibh.sbh); | |
28de7948 CG |
846 | |
847 | out: | |
1da177e4 LT |
848 | return retval; |
849 | } | |
850 | ||
cb00ea35 | 851 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
852 | { |
853 | int retval; | |
2b0143b5 | 854 | struct inode *inode = d_inode(dentry); |
1da177e4 LT |
855 | struct udf_fileident_bh fibh; |
856 | struct fileIdentDesc *fi; | |
857 | struct fileIdentDesc cfi; | |
5ca4e4be | 858 | struct kernel_lb_addr tloc; |
1da177e4 LT |
859 | |
860 | retval = -ENOENT; | |
9fbb76ce | 861 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
231473f6 FF |
862 | |
863 | if (IS_ERR_OR_NULL(fi)) { | |
864 | if (fi) | |
865 | retval = PTR_ERR(fi); | |
1da177e4 | 866 | goto out; |
231473f6 | 867 | } |
1da177e4 LT |
868 | |
869 | retval = -EIO; | |
870 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 871 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
872 | goto end_unlink; |
873 | ||
cb00ea35 | 874 | if (!inode->i_nlink) { |
1da177e4 | 875 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 876 | inode->i_ino, inode->i_nlink); |
bfe86848 | 877 | set_nlink(inode, 1); |
1da177e4 LT |
878 | } |
879 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
880 | if (retval) | |
881 | goto end_unlink; | |
882 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
883 | mark_inode_dirty(dir); | |
9a53c3a7 | 884 | inode_dec_link_count(inode); |
1da177e4 LT |
885 | inode->i_ctime = dir->i_ctime; |
886 | retval = 0; | |
887 | ||
28de7948 | 888 | end_unlink: |
1da177e4 | 889 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
890 | brelse(fibh.ebh); |
891 | brelse(fibh.sbh); | |
28de7948 CG |
892 | |
893 | out: | |
1da177e4 LT |
894 | return retval; |
895 | } | |
896 | ||
cb00ea35 CG |
897 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
898 | const char *symname) | |
1da177e4 | 899 | { |
0b93a92b | 900 | struct inode *inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO); |
1da177e4 | 901 | struct pathComponent *pc; |
391e8bbd | 902 | const char *compstart; |
28de7948 | 903 | struct extent_position epos = {}; |
1da177e4 | 904 | int eoffset, elen = 0; |
391e8bbd | 905 | uint8_t *ea; |
1da177e4 LT |
906 | int err; |
907 | int block; | |
391e8bbd | 908 | unsigned char *name = NULL; |
1da177e4 | 909 | int namelen; |
48d6d8ff | 910 | struct udf_inode_info *iinfo; |
d664b6af | 911 | struct super_block *sb = dir->i_sb; |
1da177e4 | 912 | |
0b93a92b AV |
913 | if (IS_ERR(inode)) |
914 | return PTR_ERR(inode); | |
1da177e4 | 915 | |
4d0fb621 AIB |
916 | iinfo = UDF_I(inode); |
917 | down_write(&iinfo->i_data_sem); | |
9fba7056 | 918 | name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS); |
b80697c1 JK |
919 | if (!name) { |
920 | err = -ENOMEM; | |
921 | goto out_no_entry; | |
922 | } | |
923 | ||
1da177e4 | 924 | inode->i_data.a_ops = &udf_symlink_aops; |
c73119c5 | 925 | inode->i_op = &page_symlink_inode_operations; |
21fc61c7 | 926 | inode_nohighmem(inode); |
1da177e4 | 927 | |
48d6d8ff | 928 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
5ca4e4be | 929 | struct kernel_lb_addr eloc; |
78e917d5 | 930 | uint32_t bsize; |
1da177e4 | 931 | |
d664b6af | 932 | block = udf_new_block(sb, inode, |
48d6d8ff MS |
933 | iinfo->i_location.partitionReferenceNum, |
934 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
935 | if (!block) |
936 | goto out_no_entry; | |
48d6d8ff | 937 | epos.block = iinfo->i_location; |
ff116fc8 JK |
938 | epos.offset = udf_file_entry_alloc_offset(inode); |
939 | epos.bh = NULL; | |
1da177e4 | 940 | eloc.logicalBlockNum = block; |
4b11111a | 941 | eloc.partitionReferenceNum = |
48d6d8ff | 942 | iinfo->i_location.partitionReferenceNum; |
d664b6af | 943 | bsize = sb->s_blocksize; |
78e917d5 | 944 | iinfo->i_lenExtents = bsize; |
97e961fd | 945 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
3bf25cb4 | 946 | brelse(epos.bh); |
1da177e4 | 947 | |
d664b6af | 948 | block = udf_get_pblock(sb, block, |
48d6d8ff | 949 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 950 | 0); |
d664b6af | 951 | epos.bh = udf_tgetblk(sb, block); |
ff116fc8 | 952 | lock_buffer(epos.bh); |
d664b6af | 953 | memset(epos.bh->b_data, 0x00, bsize); |
ff116fc8 JK |
954 | set_buffer_uptodate(epos.bh); |
955 | unlock_buffer(epos.bh); | |
956 | mark_buffer_dirty_inode(epos.bh, inode); | |
957 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
958 | } else |
959 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 | 960 | |
d664b6af | 961 | eoffset = sb->s_blocksize - udf_ext0_offset(inode); |
1da177e4 LT |
962 | pc = (struct pathComponent *)ea; |
963 | ||
cb00ea35 CG |
964 | if (*symname == '/') { |
965 | do { | |
1da177e4 LT |
966 | symname++; |
967 | } while (*symname == '/'); | |
968 | ||
969 | pc->componentType = 1; | |
970 | pc->lengthComponentIdent = 0; | |
971 | pc->componentFileVersionNum = 0; | |
1da177e4 LT |
972 | elen += sizeof(struct pathComponent); |
973 | } | |
974 | ||
975 | err = -ENAMETOOLONG; | |
976 | ||
cb00ea35 | 977 | while (*symname) { |
1da177e4 LT |
978 | if (elen + sizeof(struct pathComponent) > eoffset) |
979 | goto out_no_entry; | |
980 | ||
981 | pc = (struct pathComponent *)(ea + elen); | |
982 | ||
391e8bbd | 983 | compstart = symname; |
1da177e4 | 984 | |
cb00ea35 | 985 | do { |
1da177e4 LT |
986 | symname++; |
987 | } while (*symname && *symname != '/'); | |
988 | ||
989 | pc->componentType = 5; | |
990 | pc->lengthComponentIdent = 0; | |
991 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
992 | if (compstart[0] == '.') { |
993 | if ((symname - compstart) == 1) | |
1da177e4 | 994 | pc->componentType = 4; |
4b11111a MS |
995 | else if ((symname - compstart) == 2 && |
996 | compstart[1] == '.') | |
1da177e4 LT |
997 | pc->componentType = 3; |
998 | } | |
999 | ||
cb00ea35 | 1000 | if (pc->componentType == 5) { |
525e2c56 AG |
1001 | namelen = udf_put_filename(sb, compstart, |
1002 | symname - compstart, | |
9fba7056 | 1003 | name, UDF_NAME_LEN_CS0); |
28de7948 | 1004 | if (!namelen) |
1da177e4 LT |
1005 | goto out_no_entry; |
1006 | ||
4b11111a MS |
1007 | if (elen + sizeof(struct pathComponent) + namelen > |
1008 | eoffset) | |
1da177e4 LT |
1009 | goto out_no_entry; |
1010 | else | |
1011 | pc->lengthComponentIdent = namelen; | |
1012 | ||
1013 | memcpy(pc->componentIdent, name, namelen); | |
1014 | } | |
1015 | ||
1016 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1017 | ||
cb00ea35 CG |
1018 | if (*symname) { |
1019 | do { | |
1da177e4 LT |
1020 | symname++; |
1021 | } while (*symname == '/'); | |
1022 | } | |
1023 | } | |
1024 | ||
3bf25cb4 | 1025 | brelse(epos.bh); |
1da177e4 | 1026 | inode->i_size = elen; |
48d6d8ff MS |
1027 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1028 | iinfo->i_lenAlloc = inode->i_size; | |
2c948b3f JK |
1029 | else |
1030 | udf_truncate_tail_extent(inode); | |
1da177e4 | 1031 | mark_inode_dirty(inode); |
4ea7772f | 1032 | up_write(&iinfo->i_data_sem); |
1da177e4 | 1033 | |
d2be51cb | 1034 | err = udf_add_nondir(dentry, inode); |
28de7948 | 1035 | out: |
b80697c1 | 1036 | kfree(name); |
1da177e4 LT |
1037 | return err; |
1038 | ||
28de7948 | 1039 | out_no_entry: |
4d0fb621 | 1040 | up_write(&iinfo->i_data_sem); |
9a53c3a7 | 1041 | inode_dec_link_count(inode); |
b2315096 | 1042 | unlock_new_inode(inode); |
1da177e4 LT |
1043 | iput(inode); |
1044 | goto out; | |
1045 | } | |
1046 | ||
cb00ea35 CG |
1047 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1048 | struct dentry *dentry) | |
1da177e4 | 1049 | { |
2b0143b5 | 1050 | struct inode *inode = d_inode(old_dentry); |
1da177e4 LT |
1051 | struct udf_fileident_bh fibh; |
1052 | struct fileIdentDesc cfi, *fi; | |
1053 | int err; | |
1054 | ||
4b11111a MS |
1055 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1056 | if (!fi) { | |
1da177e4 LT |
1057 | return err; |
1058 | } | |
1059 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1060 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
d664b6af | 1061 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
28de7948 | 1062 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
d664b6af | 1063 | cpu_to_le32(lvid_get_unique_id(inode->i_sb)); |
1da177e4 LT |
1064 | } |
1065 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1066 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1067 | mark_inode_dirty(dir); |
28de7948 | 1068 | |
1da177e4 | 1069 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1070 | brelse(fibh.ebh); |
1071 | brelse(fibh.sbh); | |
d8c76e6f | 1072 | inc_nlink(inode); |
1da177e4 LT |
1073 | inode->i_ctime = current_fs_time(inode->i_sb); |
1074 | mark_inode_dirty(inode); | |
3adc12e9 JK |
1075 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); |
1076 | mark_inode_dirty(dir); | |
7de9c6ee | 1077 | ihold(inode); |
1da177e4 | 1078 | d_instantiate(dentry, inode); |
28de7948 | 1079 | |
1da177e4 LT |
1080 | return 0; |
1081 | } | |
1082 | ||
1083 | /* Anybody can rename anything with this: the permission checks are left to the | |
1084 | * higher-level routines. | |
1085 | */ | |
cb00ea35 CG |
1086 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1087 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1088 | { |
2b0143b5 DH |
1089 | struct inode *old_inode = d_inode(old_dentry); |
1090 | struct inode *new_inode = d_inode(new_dentry); | |
1da177e4 | 1091 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1092 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1093 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1094 | struct buffer_head *dir_bh = NULL; |
1095 | int retval = -ENOENT; | |
5ca4e4be | 1096 | struct kernel_lb_addr tloc; |
48d6d8ff | 1097 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 | 1098 | |
9fbb76ce | 1099 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
231473f6 FF |
1100 | if (IS_ERR(ofi)) { |
1101 | retval = PTR_ERR(ofi); | |
1102 | goto end_rename; | |
1da177e4 | 1103 | } |
231473f6 FF |
1104 | |
1105 | if (ofibh.sbh != ofibh.ebh) | |
1106 | brelse(ofibh.ebh); | |
1107 | ||
1108 | brelse(ofibh.sbh); | |
1da177e4 | 1109 | tloc = lelb_to_cpu(ocfi.icb.extLocation); |
97e961fd | 1110 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
cb00ea35 | 1111 | != old_inode->i_ino) |
1da177e4 LT |
1112 | goto end_rename; |
1113 | ||
9fbb76ce | 1114 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
231473f6 FF |
1115 | if (IS_ERR(nfi)) { |
1116 | retval = PTR_ERR(nfi); | |
1117 | goto end_rename; | |
1118 | } | |
1119 | if (nfi && !new_inode) { | |
1120 | if (nfibh.sbh != nfibh.ebh) | |
1121 | brelse(nfibh.ebh); | |
1122 | brelse(nfibh.sbh); | |
1123 | nfi = NULL; | |
1da177e4 | 1124 | } |
cb00ea35 | 1125 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1126 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1127 | |
cb00ea35 | 1128 | if (new_inode) { |
1da177e4 LT |
1129 | retval = -ENOTEMPTY; |
1130 | if (!empty_dir(new_inode)) | |
1131 | goto end_rename; | |
1132 | } | |
1133 | retval = -EIO; | |
48d6d8ff | 1134 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1135 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1136 | old_iinfo->i_ext.i_data - |
1137 | (old_iinfo->i_efe ? | |
4b11111a MS |
1138 | sizeof(struct extendedFileEntry) : |
1139 | sizeof(struct fileEntry)), | |
1140 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1141 | } else { |
1da177e4 LT |
1142 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1143 | if (!dir_bh) | |
1144 | goto end_rename; | |
4b11111a MS |
1145 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1146 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1147 | } |
1148 | if (!dir_fi) | |
1149 | goto end_rename; | |
1150 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
97e961fd | 1151 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
4b11111a | 1152 | old_dir->i_ino) |
1da177e4 | 1153 | goto end_rename; |
1da177e4 | 1154 | } |
cb00ea35 | 1155 | if (!nfi) { |
4b11111a MS |
1156 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1157 | &retval); | |
1da177e4 LT |
1158 | if (!nfi) |
1159 | goto end_rename; | |
1160 | } | |
1161 | ||
1162 | /* | |
1163 | * Like most other Unix systems, set the ctime for inodes on a | |
1164 | * rename. | |
1165 | */ | |
1166 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1167 | mark_inode_dirty(old_inode); | |
1168 | ||
1169 | /* | |
1170 | * ok, that's it | |
1171 | */ | |
1172 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1173 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
5ca4e4be | 1174 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
1da177e4 LT |
1175 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
1176 | ||
1177 | /* The old fid may have moved - find it again */ | |
9fbb76ce | 1178 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
1da177e4 LT |
1179 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
1180 | ||
cb00ea35 | 1181 | if (new_inode) { |
1da177e4 | 1182 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1183 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1184 | } |
1185 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
3adc12e9 | 1186 | new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb); |
1da177e4 | 1187 | mark_inode_dirty(old_dir); |
3adc12e9 | 1188 | mark_inode_dirty(new_dir); |
1da177e4 | 1189 | |
cb00ea35 | 1190 | if (dir_fi) { |
c0b34438 | 1191 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1192 | udf_update_tag((char *)dir_fi, |
1193 | (sizeof(struct fileIdentDesc) + | |
1194 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1195 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1196 | mark_inode_dirty(old_inode); |
4b11111a | 1197 | else |
1da177e4 | 1198 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1199 | |
9a53c3a7 | 1200 | inode_dec_link_count(old_dir); |
4b11111a | 1201 | if (new_inode) |
9a53c3a7 | 1202 | inode_dec_link_count(new_inode); |
4b11111a | 1203 | else { |
d8c76e6f | 1204 | inc_nlink(new_dir); |
1da177e4 LT |
1205 | mark_inode_dirty(new_dir); |
1206 | } | |
1207 | } | |
1208 | ||
cb00ea35 | 1209 | if (ofi) { |
1da177e4 | 1210 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1211 | brelse(ofibh.ebh); |
1212 | brelse(ofibh.sbh); | |
1da177e4 LT |
1213 | } |
1214 | ||
1215 | retval = 0; | |
1216 | ||
28de7948 | 1217 | end_rename: |
3bf25cb4 | 1218 | brelse(dir_bh); |
cb00ea35 | 1219 | if (nfi) { |
1da177e4 | 1220 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1221 | brelse(nfibh.ebh); |
1222 | brelse(nfibh.sbh); | |
1da177e4 | 1223 | } |
28de7948 | 1224 | |
1da177e4 LT |
1225 | return retval; |
1226 | } | |
1227 | ||
221e583a RR |
1228 | static struct dentry *udf_get_parent(struct dentry *child) |
1229 | { | |
97e961fd | 1230 | struct kernel_lb_addr tloc; |
221e583a | 1231 | struct inode *inode = NULL; |
26fe5750 | 1232 | struct qstr dotdot = QSTR_INIT("..", 2); |
221e583a RR |
1233 | struct fileIdentDesc cfi; |
1234 | struct udf_fileident_bh fibh; | |
1235 | ||
2b0143b5 | 1236 | if (!udf_find_entry(d_inode(child), &dotdot, &fibh, &cfi)) |
6d3d5e86 | 1237 | return ERR_PTR(-EACCES); |
221e583a RR |
1238 | |
1239 | if (fibh.sbh != fibh.ebh) | |
1240 | brelse(fibh.ebh); | |
1241 | brelse(fibh.sbh); | |
1242 | ||
97e961fd | 1243 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
2b0143b5 | 1244 | inode = udf_iget(d_inode(child)->i_sb, &tloc); |
6d3d5e86 JK |
1245 | if (IS_ERR(inode)) |
1246 | return ERR_CAST(inode); | |
221e583a | 1247 | |
44003728 | 1248 | return d_obtain_alias(inode); |
221e583a RR |
1249 | } |
1250 | ||
1251 | ||
1252 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1253 | u16 partref, __u32 generation) | |
1254 | { | |
1255 | struct inode *inode; | |
5ca4e4be | 1256 | struct kernel_lb_addr loc; |
221e583a RR |
1257 | |
1258 | if (block == 0) | |
1259 | return ERR_PTR(-ESTALE); | |
1260 | ||
1261 | loc.logicalBlockNum = block; | |
1262 | loc.partitionReferenceNum = partref; | |
97e961fd | 1263 | inode = udf_iget(sb, &loc); |
221e583a | 1264 | |
6d3d5e86 JK |
1265 | if (IS_ERR(inode)) |
1266 | return ERR_CAST(inode); | |
221e583a RR |
1267 | |
1268 | if (generation && inode->i_generation != generation) { | |
1269 | iput(inode); | |
1270 | return ERR_PTR(-ESTALE); | |
1271 | } | |
44003728 | 1272 | return d_obtain_alias(inode); |
221e583a RR |
1273 | } |
1274 | ||
1275 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1276 | struct fid *fid, int fh_len, int fh_type) | |
1277 | { | |
92acca45 | 1278 | if (fh_len < 3 || |
221e583a RR |
1279 | (fh_type != FILEID_UDF_WITH_PARENT && |
1280 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1281 | return NULL; | |
1282 | ||
1283 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1284 | fid->udf.generation); | |
1285 | } | |
1286 | ||
1287 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1288 | struct fid *fid, int fh_len, int fh_type) | |
1289 | { | |
92acca45 | 1290 | if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT) |
221e583a RR |
1291 | return NULL; |
1292 | ||
1293 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1294 | fid->udf.parent_partref, | |
1295 | fid->udf.parent_generation); | |
1296 | } | |
b0b0382b AV |
1297 | static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp, |
1298 | struct inode *parent) | |
221e583a RR |
1299 | { |
1300 | int len = *lenp; | |
5ca4e4be | 1301 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
221e583a RR |
1302 | struct fid *fid = (struct fid *)fh; |
1303 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1304 | ||
b0b0382b | 1305 | if (parent && (len < 5)) { |
5fe0c237 | 1306 | *lenp = 5; |
94e07a75 | 1307 | return FILEID_INVALID; |
5fe0c237 AK |
1308 | } else if (len < 3) { |
1309 | *lenp = 3; | |
94e07a75 | 1310 | return FILEID_INVALID; |
5fe0c237 | 1311 | } |
221e583a RR |
1312 | |
1313 | *lenp = 3; | |
1314 | fid->udf.block = location.logicalBlockNum; | |
1315 | fid->udf.partref = location.partitionReferenceNum; | |
0143fc5e | 1316 | fid->udf.parent_partref = 0; |
221e583a RR |
1317 | fid->udf.generation = inode->i_generation; |
1318 | ||
b0b0382b AV |
1319 | if (parent) { |
1320 | location = UDF_I(parent)->i_location; | |
221e583a RR |
1321 | fid->udf.parent_block = location.logicalBlockNum; |
1322 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1323 | fid->udf.parent_generation = inode->i_generation; | |
221e583a RR |
1324 | *lenp = 5; |
1325 | type = FILEID_UDF_WITH_PARENT; | |
1326 | } | |
1327 | ||
1328 | return type; | |
1329 | } | |
1330 | ||
1331 | const struct export_operations udf_export_ops = { | |
1332 | .encode_fh = udf_encode_fh, | |
1333 | .fh_to_dentry = udf_fh_to_dentry, | |
1334 | .fh_to_parent = udf_fh_to_parent, | |
1335 | .get_parent = udf_get_parent, | |
1336 | }; | |
1337 | ||
c5ef1c42 | 1338 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1339 | .lookup = udf_lookup, |
1340 | .create = udf_create, | |
1341 | .link = udf_link, | |
1342 | .unlink = udf_unlink, | |
1343 | .symlink = udf_symlink, | |
1344 | .mkdir = udf_mkdir, | |
1345 | .rmdir = udf_rmdir, | |
1346 | .mknod = udf_mknod, | |
1347 | .rename = udf_rename, | |
656d09df | 1348 | .tmpfile = udf_tmpfile, |
1da177e4 | 1349 | }; |