]>
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 | 76 | if (adinicb || (offset + lfi < 0)) { |
979a6e28 | 77 | memcpy(udf_get_fi_ident(sfi), fileident, lfi); |
28de7948 | 78 | } else if (offset >= 0) { |
1da177e4 | 79 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 80 | } else { |
979a6e28 | 81 | memcpy(udf_get_fi_ident(sfi), fileident, -offset); |
4b11111a MS |
82 | memcpy(fibh->ebh->b_data, fileident - offset, |
83 | lfi + offset); | |
1da177e4 LT |
84 | } |
85 | } | |
86 | ||
87 | offset += lfi; | |
88 | ||
28de7948 | 89 | if (adinicb || (offset + padlen < 0)) { |
979a6e28 | 90 | memset(udf_get_fi_ident(sfi) + lfi, 0x00, padlen); |
28de7948 | 91 | } else if (offset >= 0) { |
1da177e4 | 92 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 | 93 | } else { |
979a6e28 | 94 | memset(udf_get_fi_ident(sfi) + lfi, 0x00, -offset); |
1da177e4 LT |
95 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
96 | } | |
97 | ||
5ca4e4be PE |
98 | crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), |
99 | sizeof(struct fileIdentDesc) - sizeof(struct tag)); | |
28de7948 CG |
100 | |
101 | if (fibh->sbh == fibh->ebh) { | |
f845fced | 102 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
5ca4e4be | 103 | crclen + sizeof(struct tag) - |
f845fced | 104 | sizeof(struct fileIdentDesc)); |
28de7948 | 105 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
f845fced | 106 | crc = crc_itu_t(crc, fibh->ebh->b_data + |
4b11111a MS |
107 | sizeof(struct fileIdentDesc) + |
108 | fibh->soffset, | |
5ca4e4be | 109 | crclen + sizeof(struct tag) - |
f845fced | 110 | sizeof(struct fileIdentDesc)); |
28de7948 | 111 | } else { |
f845fced BC |
112 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
113 | -fibh->soffset - sizeof(struct fileIdentDesc)); | |
114 | crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); | |
1da177e4 LT |
115 | } |
116 | ||
117 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
118 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
3f2587bb | 119 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
1da177e4 | 120 | |
28de7948 | 121 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
4b11111a MS |
122 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
123 | sizeof(struct fileIdentDesc)); | |
28de7948 CG |
124 | } else { |
125 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
126 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 127 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
128 | } |
129 | ||
28de7948 | 130 | if (adinicb) { |
1da177e4 | 131 | mark_inode_dirty(inode); |
28de7948 | 132 | } else { |
1da177e4 LT |
133 | if (fibh->sbh != fibh->ebh) |
134 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
135 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
136 | } | |
137 | return 0; | |
138 | } | |
139 | ||
231473f6 FF |
140 | /** |
141 | * udf_find_entry - find entry in given directory. | |
142 | * | |
143 | * @dir: directory inode to search in | |
144 | * @child: qstr of the name | |
145 | * @fibh: buffer head / inode with file identifier descriptor we found | |
146 | * @cfi: found file identifier descriptor with given name | |
147 | * | |
148 | * This function searches in the directory @dir for a file name @child. When | |
149 | * found, @fibh points to the buffer head(s) (bh is NULL for in ICB | |
150 | * directories) containing the file identifier descriptor (FID). In that case | |
151 | * the function returns pointer to the FID in the buffer or inode - but note | |
152 | * that FID may be split among two buffers (blocks) so accessing it via that | |
153 | * pointer isn't easily possible. This pointer can be used only as an iterator | |
154 | * for other directory manipulation functions. For inspection of the FID @cfi | |
155 | * can be used - the found FID is copied there. | |
156 | * | |
157 | * Returns pointer to FID, NULL when nothing found, or error code. | |
158 | */ | |
cb00ea35 | 159 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
391e8bbd | 160 | const struct qstr *child, |
cb00ea35 CG |
161 | struct udf_fileident_bh *fibh, |
162 | struct fileIdentDesc *cfi) | |
1da177e4 | 163 | { |
cb00ea35 | 164 | struct fileIdentDesc *fi = NULL; |
1da177e4 | 165 | loff_t f_pos; |
b490bdd6 SM |
166 | udf_pblk_t block; |
167 | int flen; | |
066b9cde | 168 | unsigned char *fname = NULL, *copy_name = NULL; |
391e8bbd | 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) { |
979a6e28 | 228 | nameptr = udf_get_fi_ident(fi); |
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 { | |
066b9cde JK |
239 | if (!copy_name) { |
240 | copy_name = kmalloc(UDF_NAME_LEN, | |
241 | GFP_NOFS); | |
242 | if (!copy_name) { | |
243 | fi = ERR_PTR(-ENOMEM); | |
244 | goto out_err; | |
245 | } | |
246 | } | |
247 | nameptr = copy_name; | |
979a6e28 | 248 | memcpy(nameptr, udf_get_fi_ident(fi), |
4b11111a MS |
249 | lfi - poffset); |
250 | memcpy(nameptr + lfi - poffset, | |
251 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
252 | } |
253 | } | |
254 | ||
cb00ea35 | 255 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
3ee3039c | 256 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) |
1da177e4 LT |
257 | continue; |
258 | } | |
cb00ea35 CG |
259 | |
260 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
3ee3039c | 261 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) |
1da177e4 LT |
262 | continue; |
263 | } | |
264 | ||
221e583a | 265 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
a4264b3f JJ |
266 | isdotdot) |
267 | goto out_ok; | |
221e583a | 268 | |
1da177e4 LT |
269 | if (!lfi) |
270 | continue; | |
271 | ||
3ee3039c | 272 | flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN); |
231473f6 FF |
273 | if (flen < 0) { |
274 | fi = ERR_PTR(flen); | |
275 | goto out_err; | |
276 | } | |
277 | ||
278 | if (udf_match(flen, fname, child->len, child->name)) | |
b80697c1 | 279 | goto out_ok; |
1da177e4 | 280 | } |
28de7948 | 281 | |
b80697c1 | 282 | fi = NULL; |
231473f6 | 283 | out_err: |
1da177e4 | 284 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
285 | brelse(fibh->ebh); |
286 | brelse(fibh->sbh); | |
b80697c1 | 287 | out_ok: |
3bf25cb4 | 288 | brelse(epos.bh); |
b80697c1 | 289 | kfree(fname); |
066b9cde | 290 | kfree(copy_name); |
28de7948 | 291 | |
b80697c1 | 292 | return fi; |
1da177e4 LT |
293 | } |
294 | ||
cb00ea35 | 295 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 296 | unsigned int flags) |
1da177e4 LT |
297 | { |
298 | struct inode *inode = NULL; | |
db9a369e | 299 | struct fileIdentDesc cfi; |
1da177e4 | 300 | struct udf_fileident_bh fibh; |
231473f6 | 301 | struct fileIdentDesc *fi; |
1da177e4 | 302 | |
9fba7056 | 303 | if (dentry->d_name.len > UDF_NAME_LEN) |
1da177e4 LT |
304 | return ERR_PTR(-ENAMETOOLONG); |
305 | ||
231473f6 FF |
306 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
307 | if (IS_ERR(fi)) | |
308 | return ERR_CAST(fi); | |
309 | ||
310 | if (fi) { | |
97e961fd PE |
311 | struct kernel_lb_addr loc; |
312 | ||
1da177e4 | 313 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
314 | brelse(fibh.ebh); |
315 | brelse(fibh.sbh); | |
1da177e4 | 316 | |
97e961fd PE |
317 | loc = lelb_to_cpu(cfi.icb.extLocation); |
318 | inode = udf_iget(dir->i_sb, &loc); | |
6d3d5e86 JK |
319 | if (IS_ERR(inode)) |
320 | return ERR_CAST(inode); | |
1da177e4 | 321 | } |
28de7948 | 322 | |
221e583a | 323 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
324 | } |
325 | ||
cb00ea35 CG |
326 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
327 | struct dentry *dentry, | |
328 | struct udf_fileident_bh *fibh, | |
329 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 330 | { |
6c79e987 | 331 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 332 | struct fileIdentDesc *fi = NULL; |
391e8bbd | 333 | unsigned char *name = NULL; |
1da177e4 LT |
334 | int namelen; |
335 | loff_t f_pos; | |
af793295 | 336 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 337 | int nfidlen; |
b490bdd6 | 338 | udf_pblk_t block; |
5ca4e4be | 339 | struct kernel_lb_addr eloc; |
9afadc4b | 340 | uint32_t elen = 0; |
60448b1d | 341 | sector_t offset; |
28de7948 | 342 | struct extent_position epos = {}; |
48d6d8ff | 343 | struct udf_inode_info *dinfo; |
1da177e4 | 344 | |
b80697c1 | 345 | fibh->sbh = fibh->ebh = NULL; |
9fba7056 | 346 | name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS); |
b80697c1 JK |
347 | if (!name) { |
348 | *err = -ENOMEM; | |
349 | goto out_err; | |
350 | } | |
351 | ||
cb00ea35 CG |
352 | if (dentry) { |
353 | if (!dentry->d_name.len) { | |
1da177e4 | 354 | *err = -EINVAL; |
b80697c1 | 355 | goto out_err; |
1da177e4 | 356 | } |
525e2c56 AG |
357 | namelen = udf_put_filename(sb, dentry->d_name.name, |
358 | dentry->d_name.len, | |
9fba7056 | 359 | name, UDF_NAME_LEN_CS0); |
4b11111a | 360 | if (!namelen) { |
1da177e4 | 361 | *err = -ENAMETOOLONG; |
b80697c1 | 362 | goto out_err; |
1da177e4 | 363 | } |
28de7948 | 364 | } else { |
1da177e4 | 365 | namelen = 0; |
28de7948 | 366 | } |
1da177e4 | 367 | |
f2e83347 | 368 | nfidlen = ALIGN(sizeof(struct fileIdentDesc) + namelen, UDF_NAME_PAD); |
1da177e4 | 369 | |
af793295 | 370 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 371 | |
af793295 | 372 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 373 | dinfo = UDF_I(dir); |
b80697c1 JK |
374 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
375 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
376 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { | |
377 | block = udf_get_lb_pblock(dir->i_sb, | |
97e961fd | 378 | &dinfo->i_location, 0); |
b80697c1 JK |
379 | fibh->soffset = fibh->eoffset = sb->s_blocksize; |
380 | goto add; | |
381 | } | |
97e961fd | 382 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 383 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 384 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 385 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 386 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 387 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 388 | } else |
1da177e4 LT |
389 | offset = 0; |
390 | ||
4b11111a MS |
391 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
392 | if (!fibh->sbh) { | |
1da177e4 | 393 | *err = -EIO; |
b80697c1 | 394 | goto out_err; |
1da177e4 LT |
395 | } |
396 | ||
48d6d8ff | 397 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 LT |
398 | } |
399 | ||
af793295 | 400 | while (f_pos < size) { |
cb00ea35 CG |
401 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
402 | &elen, &offset); | |
1da177e4 | 403 | |
cb00ea35 | 404 | if (!fi) { |
1da177e4 | 405 | *err = -EIO; |
b80697c1 | 406 | goto out_err; |
1da177e4 LT |
407 | } |
408 | ||
cb00ea35 | 409 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
f2e83347 | 410 | if (udf_dir_entry_len(cfi) == nfidlen) { |
1da177e4 LT |
411 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
412 | cfi->fileVersionNum = cpu_to_le16(1); | |
413 | cfi->fileCharacteristics = 0; | |
414 | cfi->lengthFileIdent = namelen; | |
415 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
416 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
417 | name)) | |
b80697c1 | 418 | goto out_ok; |
4b11111a | 419 | else { |
1da177e4 | 420 | *err = -EIO; |
b80697c1 | 421 | goto out_err; |
1da177e4 LT |
422 | } |
423 | } | |
424 | } | |
1da177e4 LT |
425 | } |
426 | ||
28de7948 | 427 | add: |
1da177e4 LT |
428 | f_pos += nfidlen; |
429 | ||
48d6d8ff | 430 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 431 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 432 | brelse(epos.bh); |
ff116fc8 | 433 | epos.bh = NULL; |
1da177e4 LT |
434 | fibh->soffset -= udf_ext0_offset(dir); |
435 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 436 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 437 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
438 | brelse(fibh->ebh); |
439 | brelse(fibh->sbh); | |
4b11111a MS |
440 | fibh->sbh = fibh->ebh = |
441 | udf_expand_dir_adinicb(dir, &block, err); | |
442 | if (!fibh->sbh) | |
b80697c1 | 443 | goto out_err; |
48d6d8ff | 444 | epos.block = dinfo->i_location; |
ff116fc8 | 445 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
446 | /* Load extent udf_expand_dir_adinicb() has created */ |
447 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
448 | } |
449 | ||
2c948b3f | 450 | /* Entry fits into current block? */ |
cb00ea35 | 451 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
452 | fibh->soffset = fibh->eoffset; |
453 | fibh->eoffset += nfidlen; | |
cb00ea35 | 454 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 455 | brelse(fibh->sbh); |
1da177e4 LT |
456 | fibh->sbh = fibh->ebh; |
457 | } | |
458 | ||
48d6d8ff MS |
459 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
460 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 461 | fi = (struct fileIdentDesc *) |
382a2287 | 462 | (dinfo->i_data + fibh->soffset - |
4b11111a | 463 | udf_ext0_offset(dir) + |
48d6d8ff | 464 | dinfo->i_lenEAttr); |
cb00ea35 | 465 | } else { |
4b11111a MS |
466 | block = eloc.logicalBlockNum + |
467 | ((elen - 1) >> | |
468 | dir->i_sb->s_blocksize_bits); | |
469 | fi = (struct fileIdentDesc *) | |
470 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 471 | } |
cb00ea35 | 472 | } else { |
2c948b3f JK |
473 | /* Round up last extent in the file */ |
474 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); | |
475 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
476 | epos.offset -= sizeof(struct short_ad); | |
477 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
478 | epos.offset -= sizeof(struct long_ad); | |
479 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
480 | dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize | |
481 | - 1) & ~(sb->s_blocksize - 1); | |
482 | ||
1da177e4 LT |
483 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
484 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 485 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 486 | brelse(fibh->sbh); |
1da177e4 LT |
487 | fibh->sbh = fibh->ebh; |
488 | } | |
489 | ||
490 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 491 | dir->i_sb->s_blocksize_bits); |
4b11111a | 492 | fibh->ebh = udf_bread(dir, |
af793295 | 493 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
494 | if (!fibh->ebh) |
495 | goto out_err; | |
4651c590 JK |
496 | /* Extents could have been merged, invalidate our position */ |
497 | brelse(epos.bh); | |
498 | epos.bh = NULL; | |
499 | epos.block = dinfo->i_location; | |
500 | epos.offset = udf_file_entry_alloc_offset(dir); | |
1da177e4 | 501 | |
28de7948 | 502 | if (!fibh->soffset) { |
4651c590 JK |
503 | /* Find the freshly allocated block */ |
504 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
505 | (EXT_RECORDED_ALLOCATED >> 30)) | |
506 | ; | |
507 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
28de7948 | 508 | dir->i_sb->s_blocksize_bits); |
3bf25cb4 | 509 | brelse(fibh->sbh); |
1da177e4 LT |
510 | fibh->sbh = fibh->ebh; |
511 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 512 | } else { |
1da177e4 | 513 | fi = (struct fileIdentDesc *) |
4b11111a MS |
514 | (fibh->sbh->b_data + sb->s_blocksize + |
515 | fibh->soffset); | |
1da177e4 LT |
516 | } |
517 | } | |
518 | ||
519 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 520 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a | 521 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
5ca4e4be | 522 | sizeof(struct tag)); |
1da177e4 | 523 | else |
4b11111a | 524 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
5ca4e4be | 525 | sizeof(struct tag)); |
1da177e4 LT |
526 | cfi->fileVersionNum = cpu_to_le16(1); |
527 | cfi->lengthFileIdent = namelen; | |
528 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 529 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 530 | dir->i_size += nfidlen; |
48d6d8ff MS |
531 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
532 | dinfo->i_lenAlloc += nfidlen; | |
2c948b3f JK |
533 | else { |
534 | /* Find the last extent and truncate it to proper size */ | |
535 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
536 | (EXT_RECORDED_ALLOCATED >> 30)) | |
537 | ; | |
538 | elen -= dinfo->i_lenExtents - dir->i_size; | |
539 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
540 | epos.offset -= sizeof(struct short_ad); | |
541 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
542 | epos.offset -= sizeof(struct long_ad); | |
543 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
544 | dinfo->i_lenExtents = dir->i_size; | |
545 | } | |
546 | ||
1da177e4 | 547 | mark_inode_dirty(dir); |
b80697c1 | 548 | goto out_ok; |
cb00ea35 | 549 | } else { |
1da177e4 | 550 | *err = -EIO; |
b80697c1 | 551 | goto out_err; |
1da177e4 | 552 | } |
b80697c1 JK |
553 | |
554 | out_err: | |
555 | fi = NULL; | |
556 | if (fibh->sbh != fibh->ebh) | |
557 | brelse(fibh->ebh); | |
558 | brelse(fibh->sbh); | |
559 | out_ok: | |
560 | brelse(epos.bh); | |
561 | kfree(name); | |
562 | return fi; | |
1da177e4 LT |
563 | } |
564 | ||
565 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
566 | struct udf_fileident_bh *fibh, |
567 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
568 | { |
569 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 570 | |
1da177e4 | 571 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
5ca4e4be | 572 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
28de7948 | 573 | |
1da177e4 LT |
574 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
575 | } | |
576 | ||
d2be51cb | 577 | static int udf_add_nondir(struct dentry *dentry, struct inode *inode) |
1da177e4 | 578 | { |
d2be51cb | 579 | struct udf_inode_info *iinfo = UDF_I(inode); |
2b0143b5 | 580 | struct inode *dir = d_inode(dentry->d_parent); |
1da177e4 | 581 | struct udf_fileident_bh fibh; |
1da177e4 LT |
582 | struct fileIdentDesc cfi, *fi; |
583 | int err; | |
1da177e4 | 584 | |
4b11111a | 585 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
d2be51cb | 586 | if (unlikely(!fi)) { |
6d6b77f1 | 587 | inode_dec_link_count(inode); |
5c1a68a3 | 588 | discard_new_inode(inode); |
1da177e4 LT |
589 | return err; |
590 | } | |
591 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 592 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 593 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 594 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 595 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c2050a45 | 596 | dir->i_ctime = dir->i_mtime = current_time(dir); |
3adc12e9 | 597 | mark_inode_dirty(dir); |
1da177e4 | 598 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
599 | brelse(fibh.ebh); |
600 | brelse(fibh.sbh); | |
1e2e547a | 601 | d_instantiate_new(dentry, inode); |
28de7948 | 602 | |
1da177e4 LT |
603 | return 0; |
604 | } | |
605 | ||
549c7297 CB |
606 | static int udf_create(struct user_namespace *mnt_userns, struct inode *dir, |
607 | struct dentry *dentry, umode_t mode, bool excl) | |
d2be51cb | 608 | { |
0b93a92b | 609 | struct inode *inode = udf_new_inode(dir, mode); |
d2be51cb | 610 | |
0b93a92b AV |
611 | if (IS_ERR(inode)) |
612 | return PTR_ERR(inode); | |
d2be51cb AV |
613 | |
614 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
615 | inode->i_data.a_ops = &udf_adinicb_aops; | |
616 | else | |
617 | inode->i_data.a_ops = &udf_aops; | |
618 | inode->i_op = &udf_file_inode_operations; | |
619 | inode->i_fop = &udf_file_operations; | |
620 | mark_inode_dirty(inode); | |
621 | ||
622 | return udf_add_nondir(dentry, inode); | |
623 | } | |
624 | ||
549c7297 CB |
625 | static int udf_tmpfile(struct user_namespace *mnt_userns, struct inode *dir, |
626 | struct dentry *dentry, umode_t mode) | |
656d09df | 627 | { |
0b93a92b | 628 | struct inode *inode = udf_new_inode(dir, mode); |
656d09df | 629 | |
0b93a92b AV |
630 | if (IS_ERR(inode)) |
631 | return PTR_ERR(inode); | |
656d09df | 632 | |
0b93a92b | 633 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
656d09df AV |
634 | inode->i_data.a_ops = &udf_adinicb_aops; |
635 | else | |
636 | inode->i_data.a_ops = &udf_aops; | |
637 | inode->i_op = &udf_file_inode_operations; | |
638 | inode->i_fop = &udf_file_operations; | |
639 | mark_inode_dirty(inode); | |
656d09df | 640 | d_tmpfile(dentry, inode); |
b2315096 | 641 | unlock_new_inode(inode); |
656d09df AV |
642 | return 0; |
643 | } | |
644 | ||
549c7297 CB |
645 | static int udf_mknod(struct user_namespace *mnt_userns, struct inode *dir, |
646 | struct dentry *dentry, umode_t mode, dev_t rdev) | |
1da177e4 | 647 | { |
cb00ea35 | 648 | struct inode *inode; |
1da177e4 LT |
649 | |
650 | if (!old_valid_dev(rdev)) | |
651 | return -EINVAL; | |
652 | ||
0b93a92b AV |
653 | inode = udf_new_inode(dir, mode); |
654 | if (IS_ERR(inode)) | |
655 | return PTR_ERR(inode); | |
28de7948 | 656 | |
d2be51cb AV |
657 | init_special_inode(inode, mode, rdev); |
658 | return udf_add_nondir(dentry, inode); | |
1da177e4 LT |
659 | } |
660 | ||
549c7297 CB |
661 | static int udf_mkdir(struct user_namespace *mnt_userns, struct inode *dir, |
662 | struct dentry *dentry, umode_t mode) | |
1da177e4 | 663 | { |
cb00ea35 | 664 | struct inode *inode; |
1da177e4 LT |
665 | struct udf_fileident_bh fibh; |
666 | struct fileIdentDesc cfi, *fi; | |
667 | int err; | |
48d6d8ff MS |
668 | struct udf_inode_info *dinfo = UDF_I(dir); |
669 | struct udf_inode_info *iinfo; | |
1da177e4 | 670 | |
0b93a92b AV |
671 | inode = udf_new_inode(dir, S_IFDIR | mode); |
672 | if (IS_ERR(inode)) | |
673 | return PTR_ERR(inode); | |
1da177e4 | 674 | |
48d6d8ff | 675 | iinfo = UDF_I(inode); |
1da177e4 LT |
676 | inode->i_op = &udf_dir_inode_operations; |
677 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
678 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
679 | if (!fi) { | |
6d6b77f1 | 680 | inode_dec_link_count(inode); |
5c1a68a3 | 681 | discard_new_inode(inode); |
1da177e4 LT |
682 | goto out; |
683 | } | |
bfe86848 | 684 | set_nlink(inode, 2); |
1da177e4 | 685 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
48d6d8ff | 686 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 687 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 688 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
689 | cfi.fileCharacteristics = |
690 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 691 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 692 | brelse(fibh.sbh); |
1da177e4 LT |
693 | mark_inode_dirty(inode); |
694 | ||
4b11111a MS |
695 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
696 | if (!fi) { | |
6d6b77f1 | 697 | clear_nlink(inode); |
1da177e4 | 698 | mark_inode_dirty(inode); |
5c1a68a3 | 699 | discard_new_inode(inode); |
1da177e4 LT |
700 | goto out; |
701 | } | |
702 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 703 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 704 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 705 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
706 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
707 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 708 | inc_nlink(dir); |
c2050a45 | 709 | dir->i_ctime = dir->i_mtime = current_time(dir); |
1da177e4 | 710 | mark_inode_dirty(dir); |
1e2e547a | 711 | d_instantiate_new(dentry, inode); |
1da177e4 | 712 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
713 | brelse(fibh.ebh); |
714 | brelse(fibh.sbh); | |
1da177e4 | 715 | err = 0; |
28de7948 CG |
716 | |
717 | out: | |
1da177e4 LT |
718 | return err; |
719 | } | |
720 | ||
721 | static int empty_dir(struct inode *dir) | |
722 | { | |
723 | struct fileIdentDesc *fi, cfi; | |
724 | struct udf_fileident_bh fibh; | |
725 | loff_t f_pos; | |
af793295 | 726 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
b490bdd6 | 727 | udf_pblk_t block; |
5ca4e4be | 728 | struct kernel_lb_addr eloc; |
ff116fc8 | 729 | uint32_t elen; |
60448b1d | 730 | sector_t offset; |
28de7948 | 731 | struct extent_position epos = {}; |
48d6d8ff | 732 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 733 | |
af793295 JK |
734 | f_pos = udf_ext0_offset(dir); |
735 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 736 | |
48d6d8ff | 737 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 738 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 739 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
740 | &epos, &eloc, &elen, &offset) == |
741 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
97e961fd | 742 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 743 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 744 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 745 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 746 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 747 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 748 | } else |
1da177e4 LT |
749 | offset = 0; |
750 | ||
4b11111a MS |
751 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
752 | if (!fibh.sbh) { | |
3bf25cb4 | 753 | brelse(epos.bh); |
1da177e4 LT |
754 | return 0; |
755 | } | |
cb00ea35 | 756 | } else { |
3bf25cb4 | 757 | brelse(epos.bh); |
1da177e4 LT |
758 | return 0; |
759 | } | |
760 | ||
af793295 | 761 | while (f_pos < size) { |
cb00ea35 CG |
762 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
763 | &elen, &offset); | |
cb00ea35 | 764 | if (!fi) { |
1da177e4 | 765 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
766 | brelse(fibh.ebh); |
767 | brelse(fibh.sbh); | |
768 | brelse(epos.bh); | |
1da177e4 LT |
769 | return 0; |
770 | } | |
771 | ||
28de7948 CG |
772 | if (cfi.lengthFileIdent && |
773 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 774 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
775 | brelse(fibh.ebh); |
776 | brelse(fibh.sbh); | |
777 | brelse(epos.bh); | |
1da177e4 LT |
778 | return 0; |
779 | } | |
780 | } | |
28de7948 | 781 | |
1da177e4 | 782 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
783 | brelse(fibh.ebh); |
784 | brelse(fibh.sbh); | |
785 | brelse(epos.bh); | |
28de7948 | 786 | |
1da177e4 LT |
787 | return 1; |
788 | } | |
789 | ||
cb00ea35 | 790 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
791 | { |
792 | int retval; | |
2b0143b5 | 793 | struct inode *inode = d_inode(dentry); |
1da177e4 LT |
794 | struct udf_fileident_bh fibh; |
795 | struct fileIdentDesc *fi, cfi; | |
5ca4e4be | 796 | struct kernel_lb_addr tloc; |
1da177e4 LT |
797 | |
798 | retval = -ENOENT; | |
9fbb76ce | 799 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
231473f6 FF |
800 | if (IS_ERR_OR_NULL(fi)) { |
801 | if (fi) | |
802 | retval = PTR_ERR(fi); | |
1da177e4 | 803 | goto out; |
231473f6 | 804 | } |
1da177e4 LT |
805 | |
806 | retval = -EIO; | |
807 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 808 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
809 | goto end_rmdir; |
810 | retval = -ENOTEMPTY; | |
811 | if (!empty_dir(inode)) | |
812 | goto end_rmdir; | |
813 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
814 | if (retval) | |
815 | goto end_rmdir; | |
816 | if (inode->i_nlink != 2) | |
fcbf7637 | 817 | udf_warn(inode->i_sb, "empty directory has nlink != 2 (%u)\n", |
a40ecd7b | 818 | inode->i_nlink); |
ce71ec36 | 819 | clear_nlink(inode); |
1da177e4 | 820 | inode->i_size = 0; |
c007c06e | 821 | inode_dec_link_count(dir); |
4b11111a | 822 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
c2050a45 | 823 | current_time(inode); |
1da177e4 LT |
824 | mark_inode_dirty(dir); |
825 | ||
28de7948 | 826 | end_rmdir: |
1da177e4 | 827 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
828 | brelse(fibh.ebh); |
829 | brelse(fibh.sbh); | |
28de7948 CG |
830 | |
831 | out: | |
1da177e4 LT |
832 | return retval; |
833 | } | |
834 | ||
cb00ea35 | 835 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
836 | { |
837 | int retval; | |
2b0143b5 | 838 | struct inode *inode = d_inode(dentry); |
1da177e4 LT |
839 | struct udf_fileident_bh fibh; |
840 | struct fileIdentDesc *fi; | |
841 | struct fileIdentDesc cfi; | |
5ca4e4be | 842 | struct kernel_lb_addr tloc; |
1da177e4 LT |
843 | |
844 | retval = -ENOENT; | |
9fbb76ce | 845 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
231473f6 FF |
846 | |
847 | if (IS_ERR_OR_NULL(fi)) { | |
848 | if (fi) | |
849 | retval = PTR_ERR(fi); | |
1da177e4 | 850 | goto out; |
231473f6 | 851 | } |
1da177e4 LT |
852 | |
853 | retval = -EIO; | |
854 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 855 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
856 | goto end_unlink; |
857 | ||
cb00ea35 | 858 | if (!inode->i_nlink) { |
fcbf7637 | 859 | udf_debug("Deleting nonexistent file (%lu), %u\n", |
cb00ea35 | 860 | inode->i_ino, inode->i_nlink); |
bfe86848 | 861 | set_nlink(inode, 1); |
1da177e4 LT |
862 | } |
863 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
864 | if (retval) | |
865 | goto end_unlink; | |
c2050a45 | 866 | dir->i_ctime = dir->i_mtime = current_time(dir); |
1da177e4 | 867 | mark_inode_dirty(dir); |
9a53c3a7 | 868 | inode_dec_link_count(inode); |
1da177e4 LT |
869 | inode->i_ctime = dir->i_ctime; |
870 | retval = 0; | |
871 | ||
28de7948 | 872 | end_unlink: |
1da177e4 | 873 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
874 | brelse(fibh.ebh); |
875 | brelse(fibh.sbh); | |
28de7948 CG |
876 | |
877 | out: | |
1da177e4 LT |
878 | return retval; |
879 | } | |
880 | ||
549c7297 CB |
881 | static int udf_symlink(struct user_namespace *mnt_userns, struct inode *dir, |
882 | struct dentry *dentry, const char *symname) | |
1da177e4 | 883 | { |
6ff6b2b3 | 884 | struct inode *inode = udf_new_inode(dir, S_IFLNK | 0777); |
1da177e4 | 885 | struct pathComponent *pc; |
391e8bbd | 886 | const char *compstart; |
28de7948 | 887 | struct extent_position epos = {}; |
1da177e4 | 888 | int eoffset, elen = 0; |
391e8bbd | 889 | uint8_t *ea; |
1da177e4 | 890 | int err; |
b490bdd6 | 891 | udf_pblk_t block; |
391e8bbd | 892 | unsigned char *name = NULL; |
1da177e4 | 893 | int namelen; |
48d6d8ff | 894 | struct udf_inode_info *iinfo; |
d664b6af | 895 | struct super_block *sb = dir->i_sb; |
1da177e4 | 896 | |
0b93a92b AV |
897 | if (IS_ERR(inode)) |
898 | return PTR_ERR(inode); | |
1da177e4 | 899 | |
4d0fb621 AIB |
900 | iinfo = UDF_I(inode); |
901 | down_write(&iinfo->i_data_sem); | |
9fba7056 | 902 | name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS); |
b80697c1 JK |
903 | if (!name) { |
904 | err = -ENOMEM; | |
905 | goto out_no_entry; | |
906 | } | |
907 | ||
1da177e4 | 908 | inode->i_data.a_ops = &udf_symlink_aops; |
ad4d0532 | 909 | inode->i_op = &udf_symlink_inode_operations; |
21fc61c7 | 910 | inode_nohighmem(inode); |
1da177e4 | 911 | |
48d6d8ff | 912 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
5ca4e4be | 913 | struct kernel_lb_addr eloc; |
78e917d5 | 914 | uint32_t bsize; |
1da177e4 | 915 | |
d664b6af | 916 | block = udf_new_block(sb, inode, |
48d6d8ff MS |
917 | iinfo->i_location.partitionReferenceNum, |
918 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
919 | if (!block) |
920 | goto out_no_entry; | |
48d6d8ff | 921 | epos.block = iinfo->i_location; |
ff116fc8 JK |
922 | epos.offset = udf_file_entry_alloc_offset(inode); |
923 | epos.bh = NULL; | |
1da177e4 | 924 | eloc.logicalBlockNum = block; |
4b11111a | 925 | eloc.partitionReferenceNum = |
48d6d8ff | 926 | iinfo->i_location.partitionReferenceNum; |
d664b6af | 927 | bsize = sb->s_blocksize; |
78e917d5 | 928 | iinfo->i_lenExtents = bsize; |
97e961fd | 929 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
3bf25cb4 | 930 | brelse(epos.bh); |
1da177e4 | 931 | |
d664b6af | 932 | block = udf_get_pblock(sb, block, |
48d6d8ff | 933 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 934 | 0); |
d664b6af | 935 | epos.bh = udf_tgetblk(sb, block); |
fa236c2b AG |
936 | if (unlikely(!epos.bh)) { |
937 | err = -ENOMEM; | |
938 | goto out_no_entry; | |
939 | } | |
ff116fc8 | 940 | lock_buffer(epos.bh); |
d664b6af | 941 | memset(epos.bh->b_data, 0x00, bsize); |
ff116fc8 JK |
942 | set_buffer_uptodate(epos.bh); |
943 | unlock_buffer(epos.bh); | |
944 | mark_buffer_dirty_inode(epos.bh, inode); | |
945 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff | 946 | } else |
382a2287 | 947 | ea = iinfo->i_data + iinfo->i_lenEAttr; |
1da177e4 | 948 | |
d664b6af | 949 | eoffset = sb->s_blocksize - udf_ext0_offset(inode); |
1da177e4 LT |
950 | pc = (struct pathComponent *)ea; |
951 | ||
cb00ea35 CG |
952 | if (*symname == '/') { |
953 | do { | |
1da177e4 LT |
954 | symname++; |
955 | } while (*symname == '/'); | |
956 | ||
957 | pc->componentType = 1; | |
958 | pc->lengthComponentIdent = 0; | |
959 | pc->componentFileVersionNum = 0; | |
1da177e4 LT |
960 | elen += sizeof(struct pathComponent); |
961 | } | |
962 | ||
963 | err = -ENAMETOOLONG; | |
964 | ||
cb00ea35 | 965 | while (*symname) { |
1da177e4 LT |
966 | if (elen + sizeof(struct pathComponent) > eoffset) |
967 | goto out_no_entry; | |
968 | ||
969 | pc = (struct pathComponent *)(ea + elen); | |
970 | ||
391e8bbd | 971 | compstart = symname; |
1da177e4 | 972 | |
cb00ea35 | 973 | do { |
1da177e4 LT |
974 | symname++; |
975 | } while (*symname && *symname != '/'); | |
976 | ||
977 | pc->componentType = 5; | |
978 | pc->lengthComponentIdent = 0; | |
979 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
980 | if (compstart[0] == '.') { |
981 | if ((symname - compstart) == 1) | |
1da177e4 | 982 | pc->componentType = 4; |
4b11111a MS |
983 | else if ((symname - compstart) == 2 && |
984 | compstart[1] == '.') | |
1da177e4 LT |
985 | pc->componentType = 3; |
986 | } | |
987 | ||
cb00ea35 | 988 | if (pc->componentType == 5) { |
525e2c56 AG |
989 | namelen = udf_put_filename(sb, compstart, |
990 | symname - compstart, | |
9fba7056 | 991 | name, UDF_NAME_LEN_CS0); |
28de7948 | 992 | if (!namelen) |
1da177e4 LT |
993 | goto out_no_entry; |
994 | ||
4b11111a MS |
995 | if (elen + sizeof(struct pathComponent) + namelen > |
996 | eoffset) | |
1da177e4 LT |
997 | goto out_no_entry; |
998 | else | |
999 | pc->lengthComponentIdent = namelen; | |
1000 | ||
1001 | memcpy(pc->componentIdent, name, namelen); | |
1002 | } | |
1003 | ||
1004 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1005 | ||
cb00ea35 CG |
1006 | if (*symname) { |
1007 | do { | |
1da177e4 LT |
1008 | symname++; |
1009 | } while (*symname == '/'); | |
1010 | } | |
1011 | } | |
1012 | ||
3bf25cb4 | 1013 | brelse(epos.bh); |
1da177e4 | 1014 | inode->i_size = elen; |
48d6d8ff MS |
1015 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1016 | iinfo->i_lenAlloc = inode->i_size; | |
2c948b3f JK |
1017 | else |
1018 | udf_truncate_tail_extent(inode); | |
1da177e4 | 1019 | mark_inode_dirty(inode); |
4ea7772f | 1020 | up_write(&iinfo->i_data_sem); |
1da177e4 | 1021 | |
d2be51cb | 1022 | err = udf_add_nondir(dentry, inode); |
28de7948 | 1023 | out: |
b80697c1 | 1024 | kfree(name); |
1da177e4 LT |
1025 | return err; |
1026 | ||
28de7948 | 1027 | out_no_entry: |
4d0fb621 | 1028 | up_write(&iinfo->i_data_sem); |
9a53c3a7 | 1029 | inode_dec_link_count(inode); |
5c1a68a3 | 1030 | discard_new_inode(inode); |
1da177e4 LT |
1031 | goto out; |
1032 | } | |
1033 | ||
cb00ea35 CG |
1034 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1035 | struct dentry *dentry) | |
1da177e4 | 1036 | { |
2b0143b5 | 1037 | struct inode *inode = d_inode(old_dentry); |
1da177e4 LT |
1038 | struct udf_fileident_bh fibh; |
1039 | struct fileIdentDesc cfi, *fi; | |
1040 | int err; | |
1041 | ||
4b11111a MS |
1042 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1043 | if (!fi) { | |
1da177e4 LT |
1044 | return err; |
1045 | } | |
1046 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1047 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
d664b6af | 1048 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
28de7948 | 1049 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
d664b6af | 1050 | cpu_to_le32(lvid_get_unique_id(inode->i_sb)); |
1da177e4 LT |
1051 | } |
1052 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1053 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1054 | mark_inode_dirty(dir); |
28de7948 | 1055 | |
1da177e4 | 1056 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1057 | brelse(fibh.ebh); |
1058 | brelse(fibh.sbh); | |
d8c76e6f | 1059 | inc_nlink(inode); |
c2050a45 | 1060 | inode->i_ctime = current_time(inode); |
1da177e4 | 1061 | mark_inode_dirty(inode); |
c2050a45 | 1062 | dir->i_ctime = dir->i_mtime = current_time(dir); |
3adc12e9 | 1063 | mark_inode_dirty(dir); |
7de9c6ee | 1064 | ihold(inode); |
1da177e4 | 1065 | d_instantiate(dentry, inode); |
28de7948 | 1066 | |
1da177e4 LT |
1067 | return 0; |
1068 | } | |
1069 | ||
1070 | /* Anybody can rename anything with this: the permission checks are left to the | |
1071 | * higher-level routines. | |
1072 | */ | |
549c7297 CB |
1073 | static int udf_rename(struct user_namespace *mnt_userns, struct inode *old_dir, |
1074 | struct dentry *old_dentry, struct inode *new_dir, | |
1075 | struct dentry *new_dentry, unsigned int flags) | |
1da177e4 | 1076 | { |
2b0143b5 DH |
1077 | struct inode *old_inode = d_inode(old_dentry); |
1078 | struct inode *new_inode = d_inode(new_dentry); | |
1da177e4 | 1079 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1080 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1081 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1082 | struct buffer_head *dir_bh = NULL; |
1083 | int retval = -ENOENT; | |
5ca4e4be | 1084 | struct kernel_lb_addr tloc; |
48d6d8ff | 1085 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 | 1086 | |
f03b8ad8 MS |
1087 | if (flags & ~RENAME_NOREPLACE) |
1088 | return -EINVAL; | |
1089 | ||
9fbb76ce | 1090 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
231473f6 FF |
1091 | if (IS_ERR(ofi)) { |
1092 | retval = PTR_ERR(ofi); | |
1093 | goto end_rename; | |
1da177e4 | 1094 | } |
231473f6 FF |
1095 | |
1096 | if (ofibh.sbh != ofibh.ebh) | |
1097 | brelse(ofibh.ebh); | |
1098 | ||
1099 | brelse(ofibh.sbh); | |
1da177e4 | 1100 | tloc = lelb_to_cpu(ocfi.icb.extLocation); |
97e961fd | 1101 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
cb00ea35 | 1102 | != old_inode->i_ino) |
1da177e4 LT |
1103 | goto end_rename; |
1104 | ||
9fbb76ce | 1105 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
231473f6 FF |
1106 | if (IS_ERR(nfi)) { |
1107 | retval = PTR_ERR(nfi); | |
1108 | goto end_rename; | |
1109 | } | |
1110 | if (nfi && !new_inode) { | |
1111 | if (nfibh.sbh != nfibh.ebh) | |
1112 | brelse(nfibh.ebh); | |
1113 | brelse(nfibh.sbh); | |
1114 | nfi = NULL; | |
1da177e4 | 1115 | } |
cb00ea35 | 1116 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1117 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1118 | |
cb00ea35 | 1119 | if (new_inode) { |
1da177e4 LT |
1120 | retval = -ENOTEMPTY; |
1121 | if (!empty_dir(new_inode)) | |
1122 | goto end_rename; | |
1123 | } | |
1124 | retval = -EIO; | |
48d6d8ff | 1125 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1126 | dir_fi = udf_get_fileident( |
382a2287 | 1127 | old_iinfo->i_data - |
48d6d8ff | 1128 | (old_iinfo->i_efe ? |
4b11111a MS |
1129 | sizeof(struct extendedFileEntry) : |
1130 | sizeof(struct fileEntry)), | |
1131 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1132 | } else { |
1da177e4 LT |
1133 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1134 | if (!dir_bh) | |
1135 | goto end_rename; | |
4b11111a MS |
1136 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1137 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1138 | } |
1139 | if (!dir_fi) | |
1140 | goto end_rename; | |
1141 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
97e961fd | 1142 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
4b11111a | 1143 | old_dir->i_ino) |
1da177e4 | 1144 | goto end_rename; |
1da177e4 | 1145 | } |
cb00ea35 | 1146 | if (!nfi) { |
4b11111a MS |
1147 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1148 | &retval); | |
1da177e4 LT |
1149 | if (!nfi) |
1150 | goto end_rename; | |
1151 | } | |
1152 | ||
1153 | /* | |
1154 | * Like most other Unix systems, set the ctime for inodes on a | |
1155 | * rename. | |
1156 | */ | |
c2050a45 | 1157 | old_inode->i_ctime = current_time(old_inode); |
1da177e4 LT |
1158 | mark_inode_dirty(old_inode); |
1159 | ||
1160 | /* | |
1161 | * ok, that's it | |
1162 | */ | |
1163 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1164 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
033c9da0 | 1165 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(ocfi.icb)); |
1da177e4 LT |
1166 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
1167 | ||
1168 | /* The old fid may have moved - find it again */ | |
9fbb76ce | 1169 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
1da177e4 LT |
1170 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
1171 | ||
cb00ea35 | 1172 | if (new_inode) { |
c2050a45 | 1173 | new_inode->i_ctime = current_time(new_inode); |
9a53c3a7 | 1174 | inode_dec_link_count(new_inode); |
1da177e4 | 1175 | } |
c2050a45 DD |
1176 | old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); |
1177 | new_dir->i_ctime = new_dir->i_mtime = current_time(new_dir); | |
1da177e4 | 1178 | mark_inode_dirty(old_dir); |
3adc12e9 | 1179 | mark_inode_dirty(new_dir); |
1da177e4 | 1180 | |
cb00ea35 | 1181 | if (dir_fi) { |
c0b34438 | 1182 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
f2e83347 | 1183 | udf_update_tag((char *)dir_fi, udf_dir_entry_len(dir_fi)); |
48d6d8ff | 1184 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1185 | mark_inode_dirty(old_inode); |
4b11111a | 1186 | else |
1da177e4 | 1187 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1188 | |
9a53c3a7 | 1189 | inode_dec_link_count(old_dir); |
4b11111a | 1190 | if (new_inode) |
9a53c3a7 | 1191 | inode_dec_link_count(new_inode); |
4b11111a | 1192 | else { |
d8c76e6f | 1193 | inc_nlink(new_dir); |
1da177e4 LT |
1194 | mark_inode_dirty(new_dir); |
1195 | } | |
1196 | } | |
1197 | ||
cb00ea35 | 1198 | if (ofi) { |
1da177e4 | 1199 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1200 | brelse(ofibh.ebh); |
1201 | brelse(ofibh.sbh); | |
1da177e4 LT |
1202 | } |
1203 | ||
1204 | retval = 0; | |
1205 | ||
28de7948 | 1206 | end_rename: |
3bf25cb4 | 1207 | brelse(dir_bh); |
cb00ea35 | 1208 | if (nfi) { |
1da177e4 | 1209 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1210 | brelse(nfibh.ebh); |
1211 | brelse(nfibh.sbh); | |
1da177e4 | 1212 | } |
28de7948 | 1213 | |
1da177e4 LT |
1214 | return retval; |
1215 | } | |
1216 | ||
221e583a RR |
1217 | static struct dentry *udf_get_parent(struct dentry *child) |
1218 | { | |
97e961fd | 1219 | struct kernel_lb_addr tloc; |
221e583a | 1220 | struct inode *inode = NULL; |
221e583a RR |
1221 | struct fileIdentDesc cfi; |
1222 | struct udf_fileident_bh fibh; | |
1223 | ||
80e5d1ff | 1224 | if (!udf_find_entry(d_inode(child), &dotdot_name, &fibh, &cfi)) |
6d3d5e86 | 1225 | return ERR_PTR(-EACCES); |
221e583a RR |
1226 | |
1227 | if (fibh.sbh != fibh.ebh) | |
1228 | brelse(fibh.ebh); | |
1229 | brelse(fibh.sbh); | |
1230 | ||
97e961fd | 1231 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
fc64005c | 1232 | inode = udf_iget(child->d_sb, &tloc); |
6d3d5e86 JK |
1233 | if (IS_ERR(inode)) |
1234 | return ERR_CAST(inode); | |
221e583a | 1235 | |
44003728 | 1236 | return d_obtain_alias(inode); |
221e583a RR |
1237 | } |
1238 | ||
1239 | ||
1240 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1241 | u16 partref, __u32 generation) | |
1242 | { | |
1243 | struct inode *inode; | |
5ca4e4be | 1244 | struct kernel_lb_addr loc; |
221e583a RR |
1245 | |
1246 | if (block == 0) | |
1247 | return ERR_PTR(-ESTALE); | |
1248 | ||
1249 | loc.logicalBlockNum = block; | |
1250 | loc.partitionReferenceNum = partref; | |
97e961fd | 1251 | inode = udf_iget(sb, &loc); |
221e583a | 1252 | |
6d3d5e86 JK |
1253 | if (IS_ERR(inode)) |
1254 | return ERR_CAST(inode); | |
221e583a RR |
1255 | |
1256 | if (generation && inode->i_generation != generation) { | |
1257 | iput(inode); | |
1258 | return ERR_PTR(-ESTALE); | |
1259 | } | |
44003728 | 1260 | return d_obtain_alias(inode); |
221e583a RR |
1261 | } |
1262 | ||
1263 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1264 | struct fid *fid, int fh_len, int fh_type) | |
1265 | { | |
92acca45 | 1266 | if (fh_len < 3 || |
221e583a RR |
1267 | (fh_type != FILEID_UDF_WITH_PARENT && |
1268 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1269 | return NULL; | |
1270 | ||
1271 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1272 | fid->udf.generation); | |
1273 | } | |
1274 | ||
1275 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1276 | struct fid *fid, int fh_len, int fh_type) | |
1277 | { | |
92acca45 | 1278 | if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT) |
221e583a RR |
1279 | return NULL; |
1280 | ||
1281 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1282 | fid->udf.parent_partref, | |
1283 | fid->udf.parent_generation); | |
1284 | } | |
b0b0382b AV |
1285 | static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp, |
1286 | struct inode *parent) | |
221e583a RR |
1287 | { |
1288 | int len = *lenp; | |
5ca4e4be | 1289 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
221e583a RR |
1290 | struct fid *fid = (struct fid *)fh; |
1291 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1292 | ||
b0b0382b | 1293 | if (parent && (len < 5)) { |
5fe0c237 | 1294 | *lenp = 5; |
94e07a75 | 1295 | return FILEID_INVALID; |
5fe0c237 AK |
1296 | } else if (len < 3) { |
1297 | *lenp = 3; | |
94e07a75 | 1298 | return FILEID_INVALID; |
5fe0c237 | 1299 | } |
221e583a RR |
1300 | |
1301 | *lenp = 3; | |
1302 | fid->udf.block = location.logicalBlockNum; | |
1303 | fid->udf.partref = location.partitionReferenceNum; | |
0143fc5e | 1304 | fid->udf.parent_partref = 0; |
221e583a RR |
1305 | fid->udf.generation = inode->i_generation; |
1306 | ||
b0b0382b AV |
1307 | if (parent) { |
1308 | location = UDF_I(parent)->i_location; | |
221e583a RR |
1309 | fid->udf.parent_block = location.logicalBlockNum; |
1310 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1311 | fid->udf.parent_generation = inode->i_generation; | |
221e583a RR |
1312 | *lenp = 5; |
1313 | type = FILEID_UDF_WITH_PARENT; | |
1314 | } | |
1315 | ||
1316 | return type; | |
1317 | } | |
1318 | ||
1319 | const struct export_operations udf_export_ops = { | |
1320 | .encode_fh = udf_encode_fh, | |
1321 | .fh_to_dentry = udf_fh_to_dentry, | |
1322 | .fh_to_parent = udf_fh_to_parent, | |
1323 | .get_parent = udf_get_parent, | |
1324 | }; | |
1325 | ||
c5ef1c42 | 1326 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1327 | .lookup = udf_lookup, |
1328 | .create = udf_create, | |
1329 | .link = udf_link, | |
1330 | .unlink = udf_unlink, | |
1331 | .symlink = udf_symlink, | |
1332 | .mkdir = udf_mkdir, | |
1333 | .rmdir = udf_rmdir, | |
1334 | .mknod = udf_mknod, | |
1335 | .rename = udf_rename, | |
656d09df | 1336 | .tmpfile = udf_tmpfile, |
1da177e4 | 1337 | }; |