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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * namei.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998-2004 Ben Fennema | |
14 | * (C) 1999-2000 Stelias Computing Inc | |
15 | * | |
16 | * HISTORY | |
17 | * | |
18 | * 12/12/98 blf Created. Split out the lookup code from dir.c | |
19 | * 04/19/99 blf link, mknod, symlink support | |
20 | */ | |
21 | ||
22 | #include "udfdecl.h" | |
23 | ||
24 | #include "udf_i.h" | |
25 | #include "udf_sb.h" | |
26 | #include <linux/string.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/quotaops.h> | |
31 | #include <linux/smp_lock.h> | |
32 | #include <linux/buffer_head.h> | |
e8edc6e0 | 33 | #include <linux/sched.h> |
f845fced | 34 | #include <linux/crc-itu-t.h> |
221e583a | 35 | #include <linux/exportfs.h> |
1da177e4 | 36 | |
cb00ea35 CG |
37 | static inline int udf_match(int len1, const char *name1, int len2, |
38 | const char *name2) | |
1da177e4 LT |
39 | { |
40 | if (len1 != len2) | |
41 | return 0; | |
28de7948 | 42 | |
1da177e4 LT |
43 | return !memcmp(name1, name2, len1); |
44 | } | |
45 | ||
46 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 | 47 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
4b11111a | 48 | uint8_t *impuse, uint8_t *fileident) |
1da177e4 | 49 | { |
5ca4e4be | 50 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag); |
1da177e4 | 51 | uint16_t crc; |
1da177e4 LT |
52 | int offset; |
53 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
54 | uint8_t lfi = cfi->lengthFileIdent; | |
55 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
28de7948 | 56 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
57 | int adinicb = 0; |
58 | ||
c0b34438 | 59 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 LT |
60 | adinicb = 1; |
61 | ||
62 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
63 | ||
cb00ea35 | 64 | if (impuse) { |
28de7948 CG |
65 | if (adinicb || (offset + liu < 0)) { |
66 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
67 | } else if (offset >= 0) { | |
1da177e4 | 68 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
28de7948 CG |
69 | } else { |
70 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
4b11111a MS |
71 | memcpy(fibh->ebh->b_data, impuse - offset, |
72 | liu + offset); | |
1da177e4 LT |
73 | } |
74 | } | |
75 | ||
76 | offset += liu; | |
77 | ||
cb00ea35 | 78 | if (fileident) { |
28de7948 CG |
79 | if (adinicb || (offset + lfi < 0)) { |
80 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
81 | } else if (offset >= 0) { | |
1da177e4 | 82 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 83 | } else { |
4b11111a MS |
84 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
85 | -offset); | |
86 | memcpy(fibh->ebh->b_data, fileident - offset, | |
87 | lfi + offset); | |
1da177e4 LT |
88 | } |
89 | } | |
90 | ||
91 | offset += lfi; | |
92 | ||
28de7948 CG |
93 | if (adinicb || (offset + padlen < 0)) { |
94 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
95 | } else if (offset >= 0) { | |
1da177e4 | 96 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
97 | } else { |
98 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
99 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
100 | } | |
101 | ||
5ca4e4be PE |
102 | crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), |
103 | sizeof(struct fileIdentDesc) - sizeof(struct tag)); | |
28de7948 CG |
104 | |
105 | if (fibh->sbh == fibh->ebh) { | |
f845fced | 106 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
5ca4e4be | 107 | crclen + sizeof(struct tag) - |
f845fced | 108 | sizeof(struct fileIdentDesc)); |
28de7948 | 109 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
f845fced | 110 | crc = crc_itu_t(crc, fibh->ebh->b_data + |
4b11111a MS |
111 | sizeof(struct fileIdentDesc) + |
112 | fibh->soffset, | |
5ca4e4be | 113 | crclen + sizeof(struct tag) - |
f845fced | 114 | sizeof(struct fileIdentDesc)); |
28de7948 | 115 | } else { |
f845fced BC |
116 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
117 | -fibh->soffset - sizeof(struct fileIdentDesc)); | |
118 | crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); | |
1da177e4 LT |
119 | } |
120 | ||
121 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
122 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
3f2587bb | 123 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
1da177e4 | 124 | |
28de7948 | 125 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
4b11111a MS |
126 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
127 | sizeof(struct fileIdentDesc)); | |
28de7948 CG |
128 | } else { |
129 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
130 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 131 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
132 | } |
133 | ||
28de7948 | 134 | if (adinicb) { |
1da177e4 | 135 | mark_inode_dirty(inode); |
28de7948 | 136 | } else { |
1da177e4 LT |
137 | if (fibh->sbh != fibh->ebh) |
138 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
139 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
140 | } | |
141 | return 0; | |
142 | } | |
143 | ||
cb00ea35 | 144 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
9fbb76ce | 145 | struct qstr *child, |
cb00ea35 CG |
146 | struct udf_fileident_bh *fibh, |
147 | struct fileIdentDesc *cfi) | |
1da177e4 | 148 | { |
cb00ea35 | 149 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
150 | loff_t f_pos; |
151 | int block, flen; | |
b80697c1 | 152 | char *fname = NULL; |
1da177e4 LT |
153 | char *nameptr; |
154 | uint8_t lfi; | |
155 | uint16_t liu; | |
ec471dc4 | 156 | loff_t size; |
5ca4e4be | 157 | struct kernel_lb_addr eloc; |
ff116fc8 | 158 | uint32_t elen; |
60448b1d | 159 | sector_t offset; |
28de7948 | 160 | struct extent_position epos = {}; |
48d6d8ff | 161 | struct udf_inode_info *dinfo = UDF_I(dir); |
9fbb76ce AV |
162 | int isdotdot = child->len == 2 && |
163 | child->name[0] == '.' && child->name[1] == '.'; | |
1da177e4 | 164 | |
af793295 JK |
165 | size = udf_ext0_offset(dir) + dir->i_size; |
166 | f_pos = udf_ext0_offset(dir); | |
1da177e4 | 167 | |
b80697c1 | 168 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 169 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
b80697c1 JK |
170 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
171 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
172 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) | |
173 | goto out_err; | |
97e961fd | 174 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 175 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 176 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 177 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 178 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 179 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 180 | } else |
1da177e4 LT |
181 | offset = 0; |
182 | ||
4b11111a | 183 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
b80697c1 JK |
184 | if (!fibh->sbh) |
185 | goto out_err; | |
1da177e4 LT |
186 | } |
187 | ||
b80697c1 JK |
188 | fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
189 | if (!fname) | |
190 | goto out_err; | |
191 | ||
af793295 | 192 | while (f_pos < size) { |
cb00ea35 CG |
193 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
194 | &elen, &offset); | |
b80697c1 JK |
195 | if (!fi) |
196 | goto out_err; | |
1da177e4 LT |
197 | |
198 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
199 | lfi = cfi->lengthFileIdent; | |
200 | ||
cb00ea35 | 201 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 202 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 203 | } else { |
1da177e4 LT |
204 | int poffset; /* Unpaded ending offset */ |
205 | ||
4b11111a MS |
206 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
207 | liu + lfi; | |
1da177e4 | 208 | |
4b11111a MS |
209 | if (poffset >= lfi) |
210 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
211 | poffset - lfi); | |
212 | else { | |
1da177e4 | 213 | nameptr = fname; |
4b11111a MS |
214 | memcpy(nameptr, fi->fileIdent + liu, |
215 | lfi - poffset); | |
216 | memcpy(nameptr + lfi - poffset, | |
217 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
218 | } |
219 | } | |
220 | ||
cb00ea35 CG |
221 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
222 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
223 | continue; |
224 | } | |
cb00ea35 CG |
225 | |
226 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
227 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
228 | continue; |
229 | } | |
230 | ||
221e583a RR |
231 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
232 | isdotdot) { | |
233 | brelse(epos.bh); | |
234 | return fi; | |
235 | } | |
236 | ||
1da177e4 LT |
237 | if (!lfi) |
238 | continue; | |
239 | ||
4b11111a | 240 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
9fbb76ce | 241 | if (flen && udf_match(flen, fname, child->len, child->name)) |
b80697c1 | 242 | goto out_ok; |
1da177e4 | 243 | } |
28de7948 | 244 | |
b80697c1 JK |
245 | out_err: |
246 | fi = NULL; | |
1da177e4 | 247 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
248 | brelse(fibh->ebh); |
249 | brelse(fibh->sbh); | |
b80697c1 | 250 | out_ok: |
3bf25cb4 | 251 | brelse(epos.bh); |
b80697c1 | 252 | kfree(fname); |
28de7948 | 253 | |
b80697c1 | 254 | return fi; |
1da177e4 LT |
255 | } |
256 | ||
cb00ea35 CG |
257 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
258 | struct nameidata *nd) | |
1da177e4 LT |
259 | { |
260 | struct inode *inode = NULL; | |
db9a369e | 261 | struct fileIdentDesc cfi; |
1da177e4 LT |
262 | struct udf_fileident_bh fibh; |
263 | ||
cb00ea35 | 264 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
265 | return ERR_PTR(-ENAMETOOLONG); |
266 | ||
267 | lock_kernel(); | |
268 | #ifdef UDF_RECOVERY | |
269 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 270 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
5ca4e4be | 271 | struct kernel_lb_addr lb = { |
28de7948 | 272 | .logicalBlockNum = 0, |
4b11111a MS |
273 | .partitionReferenceNum = |
274 | simple_strtoul(dentry->d_name.name + 3, | |
275 | NULL, 0), | |
28de7948 | 276 | }; |
1da177e4 | 277 | inode = udf_iget(dir->i_sb, lb); |
cb00ea35 | 278 | if (!inode) { |
1da177e4 LT |
279 | unlock_kernel(); |
280 | return ERR_PTR(-EACCES); | |
281 | } | |
4b11111a | 282 | } else |
28de7948 | 283 | #endif /* UDF_RECOVERY */ |
1da177e4 | 284 | |
9fbb76ce | 285 | if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { |
97e961fd PE |
286 | struct kernel_lb_addr loc; |
287 | ||
1da177e4 | 288 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
289 | brelse(fibh.ebh); |
290 | brelse(fibh.sbh); | |
1da177e4 | 291 | |
97e961fd PE |
292 | loc = lelb_to_cpu(cfi.icb.extLocation); |
293 | inode = udf_iget(dir->i_sb, &loc); | |
cb00ea35 | 294 | if (!inode) { |
1da177e4 LT |
295 | unlock_kernel(); |
296 | return ERR_PTR(-EACCES); | |
297 | } | |
298 | } | |
299 | unlock_kernel(); | |
28de7948 | 300 | |
221e583a | 301 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
302 | } |
303 | ||
cb00ea35 CG |
304 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
305 | struct dentry *dentry, | |
306 | struct udf_fileident_bh *fibh, | |
307 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 308 | { |
6c79e987 | 309 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 310 | struct fileIdentDesc *fi = NULL; |
b80697c1 | 311 | char *name = NULL; |
1da177e4 LT |
312 | int namelen; |
313 | loff_t f_pos; | |
af793295 | 314 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
315 | int nfidlen; |
316 | uint8_t lfi; | |
317 | uint16_t liu; | |
318 | int block; | |
5ca4e4be | 319 | struct kernel_lb_addr eloc; |
9afadc4b | 320 | uint32_t elen = 0; |
60448b1d | 321 | sector_t offset; |
28de7948 | 322 | struct extent_position epos = {}; |
48d6d8ff | 323 | struct udf_inode_info *dinfo; |
1da177e4 | 324 | |
b80697c1 JK |
325 | fibh->sbh = fibh->ebh = NULL; |
326 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); | |
327 | if (!name) { | |
328 | *err = -ENOMEM; | |
329 | goto out_err; | |
330 | } | |
331 | ||
cb00ea35 CG |
332 | if (dentry) { |
333 | if (!dentry->d_name.len) { | |
1da177e4 | 334 | *err = -EINVAL; |
b80697c1 | 335 | goto out_err; |
1da177e4 | 336 | } |
4b11111a MS |
337 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
338 | dentry->d_name.len); | |
339 | if (!namelen) { | |
1da177e4 | 340 | *err = -ENAMETOOLONG; |
b80697c1 | 341 | goto out_err; |
1da177e4 | 342 | } |
28de7948 | 343 | } else { |
1da177e4 | 344 | namelen = 0; |
28de7948 | 345 | } |
1da177e4 LT |
346 | |
347 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
348 | ||
af793295 | 349 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 350 | |
af793295 | 351 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 352 | dinfo = UDF_I(dir); |
b80697c1 JK |
353 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
354 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
355 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { | |
356 | block = udf_get_lb_pblock(dir->i_sb, | |
97e961fd | 357 | &dinfo->i_location, 0); |
b80697c1 JK |
358 | fibh->soffset = fibh->eoffset = sb->s_blocksize; |
359 | goto add; | |
360 | } | |
97e961fd | 361 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 362 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 363 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 364 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 365 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 366 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 367 | } else |
1da177e4 LT |
368 | offset = 0; |
369 | ||
4b11111a MS |
370 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
371 | if (!fibh->sbh) { | |
1da177e4 | 372 | *err = -EIO; |
b80697c1 | 373 | goto out_err; |
1da177e4 LT |
374 | } |
375 | ||
48d6d8ff | 376 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 LT |
377 | } |
378 | ||
af793295 | 379 | while (f_pos < size) { |
cb00ea35 CG |
380 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
381 | &elen, &offset); | |
1da177e4 | 382 | |
cb00ea35 | 383 | if (!fi) { |
1da177e4 | 384 | *err = -EIO; |
b80697c1 | 385 | goto out_err; |
1da177e4 LT |
386 | } |
387 | ||
388 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
389 | lfi = cfi->lengthFileIdent; | |
390 | ||
cb00ea35 | 391 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
392 | if (((sizeof(struct fileIdentDesc) + |
393 | liu + lfi + 3) & ~3) == nfidlen) { | |
1da177e4 LT |
394 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
395 | cfi->fileVersionNum = cpu_to_le16(1); | |
396 | cfi->fileCharacteristics = 0; | |
397 | cfi->lengthFileIdent = namelen; | |
398 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
399 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
400 | name)) | |
b80697c1 | 401 | goto out_ok; |
4b11111a | 402 | else { |
1da177e4 | 403 | *err = -EIO; |
b80697c1 | 404 | goto out_err; |
1da177e4 LT |
405 | } |
406 | } | |
407 | } | |
1da177e4 LT |
408 | } |
409 | ||
28de7948 | 410 | add: |
9afadc4b JK |
411 | /* Is there any extent whose size we need to round up? */ |
412 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && elen) { | |
05343c4f JK |
413 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); |
414 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 415 | epos.offset -= sizeof(struct short_ad); |
05343c4f | 416 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 417 | epos.offset -= sizeof(struct long_ad); |
97e961fd | 418 | udf_write_aext(dir, &epos, &eloc, elen, 1); |
05343c4f | 419 | } |
1da177e4 LT |
420 | f_pos += nfidlen; |
421 | ||
48d6d8ff | 422 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 423 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 424 | brelse(epos.bh); |
ff116fc8 | 425 | epos.bh = NULL; |
1da177e4 LT |
426 | fibh->soffset -= udf_ext0_offset(dir); |
427 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 428 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 429 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
430 | brelse(fibh->ebh); |
431 | brelse(fibh->sbh); | |
4b11111a MS |
432 | fibh->sbh = fibh->ebh = |
433 | udf_expand_dir_adinicb(dir, &block, err); | |
434 | if (!fibh->sbh) | |
b80697c1 | 435 | goto out_err; |
48d6d8ff | 436 | epos.block = dinfo->i_location; |
ff116fc8 | 437 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
438 | /* Load extent udf_expand_dir_adinicb() has created */ |
439 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
440 | } |
441 | ||
cb00ea35 | 442 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
443 | fibh->soffset = fibh->eoffset; |
444 | fibh->eoffset += nfidlen; | |
cb00ea35 | 445 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 446 | brelse(fibh->sbh); |
1da177e4 LT |
447 | fibh->sbh = fibh->ebh; |
448 | } | |
449 | ||
48d6d8ff MS |
450 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
451 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 452 | fi = (struct fileIdentDesc *) |
48d6d8ff | 453 | (dinfo->i_ext.i_data + |
c0b34438 | 454 | fibh->soffset - |
4b11111a | 455 | udf_ext0_offset(dir) + |
48d6d8ff | 456 | dinfo->i_lenEAttr); |
cb00ea35 | 457 | } else { |
4b11111a MS |
458 | block = eloc.logicalBlockNum + |
459 | ((elen - 1) >> | |
460 | dir->i_sb->s_blocksize_bits); | |
461 | fi = (struct fileIdentDesc *) | |
462 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 463 | } |
cb00ea35 | 464 | } else { |
1da177e4 LT |
465 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
466 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 467 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 468 | brelse(fibh->sbh); |
1da177e4 LT |
469 | fibh->sbh = fibh->ebh; |
470 | } | |
471 | ||
472 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 473 | dir->i_sb->s_blocksize_bits); |
4b11111a | 474 | fibh->ebh = udf_bread(dir, |
af793295 | 475 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
476 | if (!fibh->ebh) |
477 | goto out_err; | |
1da177e4 | 478 | |
28de7948 | 479 | if (!fibh->soffset) { |
ff116fc8 | 480 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 481 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 482 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 | 483 | dir->i_sb->s_blocksize_bits); |
4b11111a | 484 | } else |
cb00ea35 | 485 | block++; |
1da177e4 | 486 | |
3bf25cb4 | 487 | brelse(fibh->sbh); |
1da177e4 LT |
488 | fibh->sbh = fibh->ebh; |
489 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 490 | } else { |
1da177e4 | 491 | fi = (struct fileIdentDesc *) |
4b11111a MS |
492 | (fibh->sbh->b_data + sb->s_blocksize + |
493 | fibh->soffset); | |
1da177e4 LT |
494 | } |
495 | } | |
496 | ||
497 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 498 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a | 499 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
5ca4e4be | 500 | sizeof(struct tag)); |
1da177e4 | 501 | else |
4b11111a | 502 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
5ca4e4be | 503 | sizeof(struct tag)); |
1da177e4 LT |
504 | cfi->fileVersionNum = cpu_to_le16(1); |
505 | cfi->lengthFileIdent = namelen; | |
506 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 507 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 508 | dir->i_size += nfidlen; |
48d6d8ff MS |
509 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
510 | dinfo->i_lenAlloc += nfidlen; | |
1da177e4 | 511 | mark_inode_dirty(dir); |
b80697c1 | 512 | goto out_ok; |
cb00ea35 | 513 | } else { |
1da177e4 | 514 | *err = -EIO; |
b80697c1 | 515 | goto out_err; |
1da177e4 | 516 | } |
b80697c1 JK |
517 | |
518 | out_err: | |
519 | fi = NULL; | |
520 | if (fibh->sbh != fibh->ebh) | |
521 | brelse(fibh->ebh); | |
522 | brelse(fibh->sbh); | |
523 | out_ok: | |
524 | brelse(epos.bh); | |
525 | kfree(name); | |
526 | return fi; | |
1da177e4 LT |
527 | } |
528 | ||
529 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
530 | struct udf_fileident_bh *fibh, |
531 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
532 | { |
533 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 534 | |
1da177e4 | 535 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
5ca4e4be | 536 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
28de7948 | 537 | |
1da177e4 LT |
538 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
539 | } | |
540 | ||
cb00ea35 CG |
541 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
542 | struct nameidata *nd) | |
1da177e4 LT |
543 | { |
544 | struct udf_fileident_bh fibh; | |
545 | struct inode *inode; | |
546 | struct fileIdentDesc cfi, *fi; | |
547 | int err; | |
48d6d8ff | 548 | struct udf_inode_info *iinfo; |
1da177e4 LT |
549 | |
550 | lock_kernel(); | |
551 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 552 | if (!inode) { |
1da177e4 LT |
553 | unlock_kernel(); |
554 | return err; | |
555 | } | |
556 | ||
48d6d8ff MS |
557 | iinfo = UDF_I(inode); |
558 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
559 | inode->i_data.a_ops = &udf_adinicb_aops; |
560 | else | |
561 | inode->i_data.a_ops = &udf_aops; | |
562 | inode->i_op = &udf_file_inode_operations; | |
563 | inode->i_fop = &udf_file_operations; | |
564 | inode->i_mode = mode; | |
565 | mark_inode_dirty(inode); | |
566 | ||
4b11111a MS |
567 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
568 | if (!fi) { | |
cb00ea35 | 569 | inode->i_nlink--; |
1da177e4 LT |
570 | mark_inode_dirty(inode); |
571 | iput(inode); | |
572 | unlock_kernel(); | |
573 | return err; | |
574 | } | |
575 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 576 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 577 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 578 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 579 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 580 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 581 | mark_inode_dirty(dir); |
1da177e4 | 582 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
583 | brelse(fibh.ebh); |
584 | brelse(fibh.sbh); | |
1da177e4 LT |
585 | unlock_kernel(); |
586 | d_instantiate(dentry, inode); | |
28de7948 | 587 | |
1da177e4 LT |
588 | return 0; |
589 | } | |
590 | ||
cb00ea35 CG |
591 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
592 | dev_t rdev) | |
1da177e4 | 593 | { |
cb00ea35 | 594 | struct inode *inode; |
1da177e4 LT |
595 | struct udf_fileident_bh fibh; |
596 | struct fileIdentDesc cfi, *fi; | |
597 | int err; | |
48d6d8ff | 598 | struct udf_inode_info *iinfo; |
1da177e4 LT |
599 | |
600 | if (!old_valid_dev(rdev)) | |
601 | return -EINVAL; | |
602 | ||
603 | lock_kernel(); | |
604 | err = -EIO; | |
605 | inode = udf_new_inode(dir, mode, &err); | |
606 | if (!inode) | |
607 | goto out; | |
608 | ||
48d6d8ff | 609 | iinfo = UDF_I(inode); |
7706bb39 | 610 | inode->i_uid = current_fsuid(); |
1da177e4 | 611 | init_special_inode(inode, mode, rdev); |
4b11111a MS |
612 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
613 | if (!fi) { | |
cb00ea35 | 614 | inode->i_nlink--; |
1da177e4 LT |
615 | mark_inode_dirty(inode); |
616 | iput(inode); | |
617 | unlock_kernel(); | |
618 | return err; | |
619 | } | |
620 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 621 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 622 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 623 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 624 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 625 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 626 | mark_inode_dirty(dir); |
1da177e4 LT |
627 | mark_inode_dirty(inode); |
628 | ||
629 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
630 | brelse(fibh.ebh); |
631 | brelse(fibh.sbh); | |
1da177e4 LT |
632 | d_instantiate(dentry, inode); |
633 | err = 0; | |
28de7948 CG |
634 | |
635 | out: | |
1da177e4 LT |
636 | unlock_kernel(); |
637 | return err; | |
638 | } | |
639 | ||
cb00ea35 | 640 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 641 | { |
cb00ea35 | 642 | struct inode *inode; |
1da177e4 LT |
643 | struct udf_fileident_bh fibh; |
644 | struct fileIdentDesc cfi, *fi; | |
645 | int err; | |
48d6d8ff MS |
646 | struct udf_inode_info *dinfo = UDF_I(dir); |
647 | struct udf_inode_info *iinfo; | |
1da177e4 LT |
648 | |
649 | lock_kernel(); | |
650 | err = -EMLINK; | |
cb00ea35 | 651 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
652 | goto out; |
653 | ||
654 | err = -EIO; | |
655 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
656 | if (!inode) | |
657 | goto out; | |
658 | ||
48d6d8ff | 659 | iinfo = UDF_I(inode); |
1da177e4 LT |
660 | inode->i_op = &udf_dir_inode_operations; |
661 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
662 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
663 | if (!fi) { | |
1da177e4 LT |
664 | inode->i_nlink--; |
665 | mark_inode_dirty(inode); | |
666 | iput(inode); | |
667 | goto out; | |
668 | } | |
669 | inode->i_nlink = 2; | |
670 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 671 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 672 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 673 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
674 | cfi.fileCharacteristics = |
675 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 676 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 677 | brelse(fibh.sbh); |
1da177e4 LT |
678 | inode->i_mode = S_IFDIR | mode; |
679 | if (dir->i_mode & S_ISGID) | |
680 | inode->i_mode |= S_ISGID; | |
681 | mark_inode_dirty(inode); | |
682 | ||
4b11111a MS |
683 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
684 | if (!fi) { | |
1da177e4 LT |
685 | inode->i_nlink = 0; |
686 | mark_inode_dirty(inode); | |
687 | iput(inode); | |
688 | goto out; | |
689 | } | |
690 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 691 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 692 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 693 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
694 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
695 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 696 | inc_nlink(dir); |
1da177e4 LT |
697 | mark_inode_dirty(dir); |
698 | d_instantiate(dentry, inode); | |
699 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
700 | brelse(fibh.ebh); |
701 | brelse(fibh.sbh); | |
1da177e4 | 702 | err = 0; |
28de7948 CG |
703 | |
704 | out: | |
1da177e4 LT |
705 | unlock_kernel(); |
706 | return err; | |
707 | } | |
708 | ||
709 | static int empty_dir(struct inode *dir) | |
710 | { | |
711 | struct fileIdentDesc *fi, cfi; | |
712 | struct udf_fileident_bh fibh; | |
713 | loff_t f_pos; | |
af793295 | 714 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 715 | int block; |
5ca4e4be | 716 | struct kernel_lb_addr eloc; |
ff116fc8 | 717 | uint32_t elen; |
60448b1d | 718 | sector_t offset; |
28de7948 | 719 | struct extent_position epos = {}; |
48d6d8ff | 720 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 721 | |
af793295 JK |
722 | f_pos = udf_ext0_offset(dir); |
723 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 724 | |
48d6d8ff | 725 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 726 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 727 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
728 | &epos, &eloc, &elen, &offset) == |
729 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
97e961fd | 730 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 731 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 732 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 733 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 734 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 735 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 736 | } else |
1da177e4 LT |
737 | offset = 0; |
738 | ||
4b11111a MS |
739 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
740 | if (!fibh.sbh) { | |
3bf25cb4 | 741 | brelse(epos.bh); |
1da177e4 LT |
742 | return 0; |
743 | } | |
cb00ea35 | 744 | } else { |
3bf25cb4 | 745 | brelse(epos.bh); |
1da177e4 LT |
746 | return 0; |
747 | } | |
748 | ||
af793295 | 749 | while (f_pos < size) { |
cb00ea35 CG |
750 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
751 | &elen, &offset); | |
cb00ea35 | 752 | if (!fi) { |
1da177e4 | 753 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
754 | brelse(fibh.ebh); |
755 | brelse(fibh.sbh); | |
756 | brelse(epos.bh); | |
1da177e4 LT |
757 | return 0; |
758 | } | |
759 | ||
28de7948 CG |
760 | if (cfi.lengthFileIdent && |
761 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 762 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
763 | brelse(fibh.ebh); |
764 | brelse(fibh.sbh); | |
765 | brelse(epos.bh); | |
1da177e4 LT |
766 | return 0; |
767 | } | |
768 | } | |
28de7948 | 769 | |
1da177e4 | 770 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
771 | brelse(fibh.ebh); |
772 | brelse(fibh.sbh); | |
773 | brelse(epos.bh); | |
28de7948 | 774 | |
1da177e4 LT |
775 | return 1; |
776 | } | |
777 | ||
cb00ea35 | 778 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
779 | { |
780 | int retval; | |
cb00ea35 | 781 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
782 | struct udf_fileident_bh fibh; |
783 | struct fileIdentDesc *fi, cfi; | |
5ca4e4be | 784 | struct kernel_lb_addr tloc; |
1da177e4 LT |
785 | |
786 | retval = -ENOENT; | |
787 | lock_kernel(); | |
9fbb76ce | 788 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
789 | if (!fi) |
790 | goto out; | |
791 | ||
792 | retval = -EIO; | |
793 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 794 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
795 | goto end_rmdir; |
796 | retval = -ENOTEMPTY; | |
797 | if (!empty_dir(inode)) | |
798 | goto end_rmdir; | |
799 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
800 | if (retval) | |
801 | goto end_rmdir; | |
802 | if (inode->i_nlink != 2) | |
803 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
804 | "empty directory has nlink != 2 (%d)", |
805 | inode->i_nlink); | |
ce71ec36 | 806 | clear_nlink(inode); |
1da177e4 | 807 | inode->i_size = 0; |
c007c06e | 808 | inode_dec_link_count(dir); |
4b11111a MS |
809 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
810 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
811 | mark_inode_dirty(dir); |
812 | ||
28de7948 | 813 | end_rmdir: |
1da177e4 | 814 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
815 | brelse(fibh.ebh); |
816 | brelse(fibh.sbh); | |
28de7948 CG |
817 | |
818 | out: | |
1da177e4 LT |
819 | unlock_kernel(); |
820 | return retval; | |
821 | } | |
822 | ||
cb00ea35 | 823 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
824 | { |
825 | int retval; | |
cb00ea35 | 826 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
827 | struct udf_fileident_bh fibh; |
828 | struct fileIdentDesc *fi; | |
829 | struct fileIdentDesc cfi; | |
5ca4e4be | 830 | struct kernel_lb_addr tloc; |
1da177e4 LT |
831 | |
832 | retval = -ENOENT; | |
833 | lock_kernel(); | |
9fbb76ce | 834 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
835 | if (!fi) |
836 | goto out; | |
837 | ||
838 | retval = -EIO; | |
839 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 840 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
841 | goto end_unlink; |
842 | ||
cb00ea35 | 843 | if (!inode->i_nlink) { |
1da177e4 | 844 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 845 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
846 | inode->i_nlink = 1; |
847 | } | |
848 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
849 | if (retval) | |
850 | goto end_unlink; | |
851 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
852 | mark_inode_dirty(dir); | |
9a53c3a7 | 853 | inode_dec_link_count(inode); |
1da177e4 LT |
854 | inode->i_ctime = dir->i_ctime; |
855 | retval = 0; | |
856 | ||
28de7948 | 857 | end_unlink: |
1da177e4 | 858 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
859 | brelse(fibh.ebh); |
860 | brelse(fibh.sbh); | |
28de7948 CG |
861 | |
862 | out: | |
1da177e4 LT |
863 | unlock_kernel(); |
864 | return retval; | |
865 | } | |
866 | ||
cb00ea35 CG |
867 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
868 | const char *symname) | |
1da177e4 | 869 | { |
cb00ea35 | 870 | struct inode *inode; |
1da177e4 LT |
871 | struct pathComponent *pc; |
872 | char *compstart; | |
873 | struct udf_fileident_bh fibh; | |
28de7948 | 874 | struct extent_position epos = {}; |
1da177e4 LT |
875 | int eoffset, elen = 0; |
876 | struct fileIdentDesc *fi; | |
877 | struct fileIdentDesc cfi; | |
878 | char *ea; | |
879 | int err; | |
880 | int block; | |
b80697c1 | 881 | char *name = NULL; |
1da177e4 | 882 | int namelen; |
6c79e987 | 883 | struct buffer_head *bh; |
48d6d8ff | 884 | struct udf_inode_info *iinfo; |
1da177e4 LT |
885 | |
886 | lock_kernel(); | |
4b11111a MS |
887 | inode = udf_new_inode(dir, S_IFLNK, &err); |
888 | if (!inode) | |
1da177e4 LT |
889 | goto out; |
890 | ||
b80697c1 JK |
891 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
892 | if (!name) { | |
893 | err = -ENOMEM; | |
894 | goto out_no_entry; | |
895 | } | |
896 | ||
48d6d8ff | 897 | iinfo = UDF_I(inode); |
1da177e4 LT |
898 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
899 | inode->i_data.a_ops = &udf_symlink_aops; | |
900 | inode->i_op = &page_symlink_inode_operations; | |
901 | ||
48d6d8ff | 902 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
5ca4e4be | 903 | struct kernel_lb_addr eloc; |
78e917d5 | 904 | uint32_t bsize; |
1da177e4 LT |
905 | |
906 | block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
907 | iinfo->i_location.partitionReferenceNum, |
908 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
909 | if (!block) |
910 | goto out_no_entry; | |
48d6d8ff | 911 | epos.block = iinfo->i_location; |
ff116fc8 JK |
912 | epos.offset = udf_file_entry_alloc_offset(inode); |
913 | epos.bh = NULL; | |
1da177e4 | 914 | eloc.logicalBlockNum = block; |
4b11111a | 915 | eloc.partitionReferenceNum = |
48d6d8ff | 916 | iinfo->i_location.partitionReferenceNum; |
78e917d5 HH |
917 | bsize = inode->i_sb->s_blocksize; |
918 | iinfo->i_lenExtents = bsize; | |
97e961fd | 919 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
3bf25cb4 | 920 | brelse(epos.bh); |
1da177e4 LT |
921 | |
922 | block = udf_get_pblock(inode->i_sb, block, | |
48d6d8ff | 923 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 924 | 0); |
ff116fc8 JK |
925 | epos.bh = udf_tread(inode->i_sb, block); |
926 | lock_buffer(epos.bh); | |
927 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
928 | set_buffer_uptodate(epos.bh); | |
929 | unlock_buffer(epos.bh); | |
930 | mark_buffer_dirty_inode(epos.bh, inode); | |
931 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
932 | } else |
933 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 LT |
934 | |
935 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
936 | pc = (struct pathComponent *)ea; | |
937 | ||
cb00ea35 CG |
938 | if (*symname == '/') { |
939 | do { | |
1da177e4 LT |
940 | symname++; |
941 | } while (*symname == '/'); | |
942 | ||
943 | pc->componentType = 1; | |
944 | pc->lengthComponentIdent = 0; | |
945 | pc->componentFileVersionNum = 0; | |
946 | pc += sizeof(struct pathComponent); | |
947 | elen += sizeof(struct pathComponent); | |
948 | } | |
949 | ||
950 | err = -ENAMETOOLONG; | |
951 | ||
cb00ea35 | 952 | while (*symname) { |
1da177e4 LT |
953 | if (elen + sizeof(struct pathComponent) > eoffset) |
954 | goto out_no_entry; | |
955 | ||
956 | pc = (struct pathComponent *)(ea + elen); | |
957 | ||
958 | compstart = (char *)symname; | |
959 | ||
cb00ea35 | 960 | do { |
1da177e4 LT |
961 | symname++; |
962 | } while (*symname && *symname != '/'); | |
963 | ||
964 | pc->componentType = 5; | |
965 | pc->lengthComponentIdent = 0; | |
966 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
967 | if (compstart[0] == '.') { |
968 | if ((symname - compstart) == 1) | |
1da177e4 | 969 | pc->componentType = 4; |
4b11111a MS |
970 | else if ((symname - compstart) == 2 && |
971 | compstart[1] == '.') | |
1da177e4 LT |
972 | pc->componentType = 3; |
973 | } | |
974 | ||
cb00ea35 | 975 | if (pc->componentType == 5) { |
28de7948 CG |
976 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
977 | symname - compstart); | |
978 | if (!namelen) | |
1da177e4 LT |
979 | goto out_no_entry; |
980 | ||
4b11111a MS |
981 | if (elen + sizeof(struct pathComponent) + namelen > |
982 | eoffset) | |
1da177e4 LT |
983 | goto out_no_entry; |
984 | else | |
985 | pc->lengthComponentIdent = namelen; | |
986 | ||
987 | memcpy(pc->componentIdent, name, namelen); | |
988 | } | |
989 | ||
990 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
991 | ||
cb00ea35 CG |
992 | if (*symname) { |
993 | do { | |
1da177e4 LT |
994 | symname++; |
995 | } while (*symname == '/'); | |
996 | } | |
997 | } | |
998 | ||
3bf25cb4 | 999 | brelse(epos.bh); |
1da177e4 | 1000 | inode->i_size = elen; |
48d6d8ff MS |
1001 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1002 | iinfo->i_lenAlloc = inode->i_size; | |
1da177e4 LT |
1003 | mark_inode_dirty(inode); |
1004 | ||
4b11111a MS |
1005 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1006 | if (!fi) | |
1da177e4 LT |
1007 | goto out_no_entry; |
1008 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 1009 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
6c79e987 MS |
1010 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1011 | if (bh) { | |
4b11111a MS |
1012 | struct logicalVolIntegrityDesc *lvid = |
1013 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1014 | struct logicalVolHeaderDesc *lvhd; |
1015 | uint64_t uniqueID; | |
4b11111a MS |
1016 | lvhd = (struct logicalVolHeaderDesc *) |
1017 | lvid->logicalVolContentsUse; | |
1da177e4 | 1018 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1019 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1020 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1021 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1022 | uniqueID += 16; | |
1023 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1024 | mark_buffer_dirty(bh); |
1da177e4 LT |
1025 | } |
1026 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1027 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1028 | mark_inode_dirty(dir); |
1da177e4 | 1029 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1030 | brelse(fibh.ebh); |
1031 | brelse(fibh.sbh); | |
1da177e4 LT |
1032 | d_instantiate(dentry, inode); |
1033 | err = 0; | |
1034 | ||
28de7948 | 1035 | out: |
b80697c1 | 1036 | kfree(name); |
1da177e4 LT |
1037 | unlock_kernel(); |
1038 | return err; | |
1039 | ||
28de7948 | 1040 | out_no_entry: |
9a53c3a7 | 1041 | inode_dec_link_count(inode); |
1da177e4 LT |
1042 | iput(inode); |
1043 | goto out; | |
1044 | } | |
1045 | ||
cb00ea35 CG |
1046 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1047 | struct dentry *dentry) | |
1da177e4 LT |
1048 | { |
1049 | struct inode *inode = old_dentry->d_inode; | |
1050 | struct udf_fileident_bh fibh; | |
1051 | struct fileIdentDesc cfi, *fi; | |
1052 | int err; | |
6c79e987 | 1053 | struct buffer_head *bh; |
1da177e4 LT |
1054 | |
1055 | lock_kernel(); | |
cb00ea35 | 1056 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1057 | unlock_kernel(); |
1058 | return -EMLINK; | |
1059 | } | |
1060 | ||
4b11111a MS |
1061 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1062 | if (!fi) { | |
1da177e4 LT |
1063 | unlock_kernel(); |
1064 | return err; | |
1065 | } | |
1066 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1067 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1068 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1069 | if (bh) { | |
4b11111a MS |
1070 | struct logicalVolIntegrityDesc *lvid = |
1071 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1072 | struct logicalVolHeaderDesc *lvhd; |
1073 | uint64_t uniqueID; | |
4b11111a MS |
1074 | lvhd = (struct logicalVolHeaderDesc *) |
1075 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1076 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1077 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1078 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1079 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1080 | uniqueID += 16; | |
1081 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1082 | mark_buffer_dirty(bh); |
1da177e4 LT |
1083 | } |
1084 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1085 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1086 | mark_inode_dirty(dir); |
28de7948 | 1087 | |
1da177e4 | 1088 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1089 | brelse(fibh.ebh); |
1090 | brelse(fibh.sbh); | |
d8c76e6f | 1091 | inc_nlink(inode); |
1da177e4 LT |
1092 | inode->i_ctime = current_fs_time(inode->i_sb); |
1093 | mark_inode_dirty(inode); | |
1094 | atomic_inc(&inode->i_count); | |
1095 | d_instantiate(dentry, inode); | |
1096 | unlock_kernel(); | |
28de7948 | 1097 | |
1da177e4 LT |
1098 | return 0; |
1099 | } | |
1100 | ||
1101 | /* Anybody can rename anything with this: the permission checks are left to the | |
1102 | * higher-level routines. | |
1103 | */ | |
cb00ea35 CG |
1104 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1105 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1106 | { |
cb00ea35 CG |
1107 | struct inode *old_inode = old_dentry->d_inode; |
1108 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1109 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1110 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1111 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1112 | struct buffer_head *dir_bh = NULL; |
1113 | int retval = -ENOENT; | |
5ca4e4be | 1114 | struct kernel_lb_addr tloc; |
48d6d8ff | 1115 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 LT |
1116 | |
1117 | lock_kernel(); | |
9fbb76ce | 1118 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
4b11111a | 1119 | if (ofi) { |
1da177e4 | 1120 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1121 | brelse(ofibh.ebh); |
1122 | brelse(ofibh.sbh); | |
1da177e4 LT |
1123 | } |
1124 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
97e961fd | 1125 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
cb00ea35 | 1126 | != old_inode->i_ino) |
1da177e4 LT |
1127 | goto end_rename; |
1128 | ||
9fbb76ce | 1129 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
cb00ea35 CG |
1130 | if (nfi) { |
1131 | if (!new_inode) { | |
1da177e4 | 1132 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1133 | brelse(nfibh.ebh); |
1134 | brelse(nfibh.sbh); | |
1da177e4 LT |
1135 | nfi = NULL; |
1136 | } | |
1137 | } | |
cb00ea35 | 1138 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1139 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1140 | |
cb00ea35 | 1141 | if (new_inode) { |
1da177e4 LT |
1142 | retval = -ENOTEMPTY; |
1143 | if (!empty_dir(new_inode)) | |
1144 | goto end_rename; | |
1145 | } | |
1146 | retval = -EIO; | |
48d6d8ff | 1147 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1148 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1149 | old_iinfo->i_ext.i_data - |
1150 | (old_iinfo->i_efe ? | |
4b11111a MS |
1151 | sizeof(struct extendedFileEntry) : |
1152 | sizeof(struct fileEntry)), | |
1153 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1154 | } else { |
1da177e4 LT |
1155 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1156 | if (!dir_bh) | |
1157 | goto end_rename; | |
4b11111a MS |
1158 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1159 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1160 | } |
1161 | if (!dir_fi) | |
1162 | goto end_rename; | |
1163 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
97e961fd | 1164 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
4b11111a | 1165 | old_dir->i_ino) |
1da177e4 LT |
1166 | goto end_rename; |
1167 | ||
1168 | retval = -EMLINK; | |
4b11111a MS |
1169 | if (!new_inode && |
1170 | new_dir->i_nlink >= | |
1171 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1172 | goto end_rename; |
1173 | } | |
cb00ea35 | 1174 | if (!nfi) { |
4b11111a MS |
1175 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1176 | &retval); | |
1da177e4 LT |
1177 | if (!nfi) |
1178 | goto end_rename; | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * Like most other Unix systems, set the ctime for inodes on a | |
1183 | * rename. | |
1184 | */ | |
1185 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1186 | mark_inode_dirty(old_inode); | |
1187 | ||
1188 | /* | |
1189 | * ok, that's it | |
1190 | */ | |
1191 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1192 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
5ca4e4be | 1193 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
1da177e4 LT |
1194 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
1195 | ||
1196 | /* The old fid may have moved - find it again */ | |
9fbb76ce | 1197 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
1da177e4 LT |
1198 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
1199 | ||
cb00ea35 | 1200 | if (new_inode) { |
1da177e4 | 1201 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1202 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1203 | } |
1204 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1205 | mark_inode_dirty(old_dir); | |
1206 | ||
cb00ea35 | 1207 | if (dir_fi) { |
c0b34438 | 1208 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1209 | udf_update_tag((char *)dir_fi, |
1210 | (sizeof(struct fileIdentDesc) + | |
1211 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1212 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1213 | mark_inode_dirty(old_inode); |
4b11111a | 1214 | else |
1da177e4 | 1215 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1216 | |
9a53c3a7 | 1217 | inode_dec_link_count(old_dir); |
4b11111a | 1218 | if (new_inode) |
9a53c3a7 | 1219 | inode_dec_link_count(new_inode); |
4b11111a | 1220 | else { |
d8c76e6f | 1221 | inc_nlink(new_dir); |
1da177e4 LT |
1222 | mark_inode_dirty(new_dir); |
1223 | } | |
1224 | } | |
1225 | ||
cb00ea35 | 1226 | if (ofi) { |
1da177e4 | 1227 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1228 | brelse(ofibh.ebh); |
1229 | brelse(ofibh.sbh); | |
1da177e4 LT |
1230 | } |
1231 | ||
1232 | retval = 0; | |
1233 | ||
28de7948 | 1234 | end_rename: |
3bf25cb4 | 1235 | brelse(dir_bh); |
cb00ea35 | 1236 | if (nfi) { |
1da177e4 | 1237 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1238 | brelse(nfibh.ebh); |
1239 | brelse(nfibh.sbh); | |
1da177e4 LT |
1240 | } |
1241 | unlock_kernel(); | |
28de7948 | 1242 | |
1da177e4 LT |
1243 | return retval; |
1244 | } | |
1245 | ||
221e583a RR |
1246 | static struct dentry *udf_get_parent(struct dentry *child) |
1247 | { | |
97e961fd | 1248 | struct kernel_lb_addr tloc; |
221e583a | 1249 | struct inode *inode = NULL; |
9fbb76ce | 1250 | struct qstr dotdot = {.name = "..", .len = 2}; |
221e583a RR |
1251 | struct fileIdentDesc cfi; |
1252 | struct udf_fileident_bh fibh; | |
1253 | ||
221e583a RR |
1254 | lock_kernel(); |
1255 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) | |
1256 | goto out_unlock; | |
1257 | ||
1258 | if (fibh.sbh != fibh.ebh) | |
1259 | brelse(fibh.ebh); | |
1260 | brelse(fibh.sbh); | |
1261 | ||
97e961fd PE |
1262 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
1263 | inode = udf_iget(child->d_inode->i_sb, &tloc); | |
221e583a RR |
1264 | if (!inode) |
1265 | goto out_unlock; | |
1266 | unlock_kernel(); | |
1267 | ||
44003728 | 1268 | return d_obtain_alias(inode); |
221e583a RR |
1269 | out_unlock: |
1270 | unlock_kernel(); | |
1271 | return ERR_PTR(-EACCES); | |
1272 | } | |
1273 | ||
1274 | ||
1275 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1276 | u16 partref, __u32 generation) | |
1277 | { | |
1278 | struct inode *inode; | |
5ca4e4be | 1279 | struct kernel_lb_addr loc; |
221e583a RR |
1280 | |
1281 | if (block == 0) | |
1282 | return ERR_PTR(-ESTALE); | |
1283 | ||
1284 | loc.logicalBlockNum = block; | |
1285 | loc.partitionReferenceNum = partref; | |
97e961fd | 1286 | inode = udf_iget(sb, &loc); |
221e583a RR |
1287 | |
1288 | if (inode == NULL) | |
1289 | return ERR_PTR(-ENOMEM); | |
1290 | ||
1291 | if (generation && inode->i_generation != generation) { | |
1292 | iput(inode); | |
1293 | return ERR_PTR(-ESTALE); | |
1294 | } | |
44003728 | 1295 | return d_obtain_alias(inode); |
221e583a RR |
1296 | } |
1297 | ||
1298 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1299 | struct fid *fid, int fh_len, int fh_type) | |
1300 | { | |
1301 | if ((fh_len != 3 && fh_len != 5) || | |
1302 | (fh_type != FILEID_UDF_WITH_PARENT && | |
1303 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1304 | return NULL; | |
1305 | ||
1306 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1307 | fid->udf.generation); | |
1308 | } | |
1309 | ||
1310 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1311 | struct fid *fid, int fh_len, int fh_type) | |
1312 | { | |
1313 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) | |
1314 | return NULL; | |
1315 | ||
1316 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1317 | fid->udf.parent_partref, | |
1318 | fid->udf.parent_generation); | |
1319 | } | |
1320 | static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, | |
1321 | int connectable) | |
1322 | { | |
1323 | int len = *lenp; | |
1324 | struct inode *inode = de->d_inode; | |
5ca4e4be | 1325 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
221e583a RR |
1326 | struct fid *fid = (struct fid *)fh; |
1327 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1328 | ||
1329 | if (len < 3 || (connectable && len < 5)) | |
1330 | return 255; | |
1331 | ||
1332 | *lenp = 3; | |
1333 | fid->udf.block = location.logicalBlockNum; | |
1334 | fid->udf.partref = location.partitionReferenceNum; | |
1335 | fid->udf.generation = inode->i_generation; | |
1336 | ||
1337 | if (connectable && !S_ISDIR(inode->i_mode)) { | |
1338 | spin_lock(&de->d_lock); | |
1339 | inode = de->d_parent->d_inode; | |
1340 | location = UDF_I(inode)->i_location; | |
1341 | fid->udf.parent_block = location.logicalBlockNum; | |
1342 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1343 | fid->udf.parent_generation = inode->i_generation; | |
1344 | spin_unlock(&de->d_lock); | |
1345 | *lenp = 5; | |
1346 | type = FILEID_UDF_WITH_PARENT; | |
1347 | } | |
1348 | ||
1349 | return type; | |
1350 | } | |
1351 | ||
1352 | const struct export_operations udf_export_ops = { | |
1353 | .encode_fh = udf_encode_fh, | |
1354 | .fh_to_dentry = udf_fh_to_dentry, | |
1355 | .fh_to_parent = udf_fh_to_parent, | |
1356 | .get_parent = udf_get_parent, | |
1357 | }; | |
1358 | ||
c5ef1c42 | 1359 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1360 | .lookup = udf_lookup, |
1361 | .create = udf_create, | |
1362 | .link = udf_link, | |
1363 | .unlink = udf_unlink, | |
1364 | .symlink = udf_symlink, | |
1365 | .mkdir = udf_mkdir, | |
1366 | .rmdir = udf_rmdir, | |
1367 | .mknod = udf_mknod, | |
1368 | .rename = udf_rename, | |
1da177e4 | 1369 | }; |