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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 | |
391e8bbd AV |
37 | static inline int udf_match(int len1, const unsigned char *name1, int len2, |
38 | const unsigned 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, |
391e8bbd | 145 | const 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; | |
391e8bbd AV |
152 | unsigned char *fname = NULL; |
153 | unsigned char *nameptr; | |
1da177e4 LT |
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; |
391e8bbd | 311 | unsigned 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: |
1da177e4 LT |
411 | f_pos += nfidlen; |
412 | ||
48d6d8ff | 413 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 414 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 415 | brelse(epos.bh); |
ff116fc8 | 416 | epos.bh = NULL; |
1da177e4 LT |
417 | fibh->soffset -= udf_ext0_offset(dir); |
418 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 419 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 420 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
421 | brelse(fibh->ebh); |
422 | brelse(fibh->sbh); | |
4b11111a MS |
423 | fibh->sbh = fibh->ebh = |
424 | udf_expand_dir_adinicb(dir, &block, err); | |
425 | if (!fibh->sbh) | |
b80697c1 | 426 | goto out_err; |
48d6d8ff | 427 | epos.block = dinfo->i_location; |
ff116fc8 | 428 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
429 | /* Load extent udf_expand_dir_adinicb() has created */ |
430 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
431 | } |
432 | ||
2c948b3f | 433 | /* Entry fits into current block? */ |
cb00ea35 | 434 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
435 | fibh->soffset = fibh->eoffset; |
436 | fibh->eoffset += nfidlen; | |
cb00ea35 | 437 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 438 | brelse(fibh->sbh); |
1da177e4 LT |
439 | fibh->sbh = fibh->ebh; |
440 | } | |
441 | ||
48d6d8ff MS |
442 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
443 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 444 | fi = (struct fileIdentDesc *) |
48d6d8ff | 445 | (dinfo->i_ext.i_data + |
c0b34438 | 446 | fibh->soffset - |
4b11111a | 447 | udf_ext0_offset(dir) + |
48d6d8ff | 448 | dinfo->i_lenEAttr); |
cb00ea35 | 449 | } else { |
4b11111a MS |
450 | block = eloc.logicalBlockNum + |
451 | ((elen - 1) >> | |
452 | dir->i_sb->s_blocksize_bits); | |
453 | fi = (struct fileIdentDesc *) | |
454 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 455 | } |
cb00ea35 | 456 | } else { |
2c948b3f JK |
457 | /* Round up last extent in the file */ |
458 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); | |
459 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
460 | epos.offset -= sizeof(struct short_ad); | |
461 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
462 | epos.offset -= sizeof(struct long_ad); | |
463 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
464 | dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize | |
465 | - 1) & ~(sb->s_blocksize - 1); | |
466 | ||
1da177e4 LT |
467 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
468 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 469 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 470 | brelse(fibh->sbh); |
1da177e4 LT |
471 | fibh->sbh = fibh->ebh; |
472 | } | |
473 | ||
474 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 475 | dir->i_sb->s_blocksize_bits); |
4b11111a | 476 | fibh->ebh = udf_bread(dir, |
af793295 | 477 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
478 | if (!fibh->ebh) |
479 | goto out_err; | |
1da177e4 | 480 | |
28de7948 | 481 | if (!fibh->soffset) { |
ff116fc8 | 482 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
cb00ea35 | 483 | (EXT_RECORDED_ALLOCATED >> 30)) { |
1da177e4 | 484 | block = eloc.logicalBlockNum + ((elen - 1) >> |
28de7948 | 485 | dir->i_sb->s_blocksize_bits); |
4b11111a | 486 | } else |
cb00ea35 | 487 | block++; |
1da177e4 | 488 | |
3bf25cb4 | 489 | brelse(fibh->sbh); |
1da177e4 LT |
490 | fibh->sbh = fibh->ebh; |
491 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 492 | } else { |
1da177e4 | 493 | fi = (struct fileIdentDesc *) |
4b11111a MS |
494 | (fibh->sbh->b_data + sb->s_blocksize + |
495 | fibh->soffset); | |
1da177e4 LT |
496 | } |
497 | } | |
498 | ||
499 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 500 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a | 501 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
5ca4e4be | 502 | sizeof(struct tag)); |
1da177e4 | 503 | else |
4b11111a | 504 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
5ca4e4be | 505 | sizeof(struct tag)); |
1da177e4 LT |
506 | cfi->fileVersionNum = cpu_to_le16(1); |
507 | cfi->lengthFileIdent = namelen; | |
508 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 509 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 510 | dir->i_size += nfidlen; |
48d6d8ff MS |
511 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
512 | dinfo->i_lenAlloc += nfidlen; | |
2c948b3f JK |
513 | else { |
514 | /* Find the last extent and truncate it to proper size */ | |
515 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
516 | (EXT_RECORDED_ALLOCATED >> 30)) | |
517 | ; | |
518 | elen -= dinfo->i_lenExtents - dir->i_size; | |
519 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
520 | epos.offset -= sizeof(struct short_ad); | |
521 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
522 | epos.offset -= sizeof(struct long_ad); | |
523 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
524 | dinfo->i_lenExtents = dir->i_size; | |
525 | } | |
526 | ||
1da177e4 | 527 | mark_inode_dirty(dir); |
b80697c1 | 528 | goto out_ok; |
cb00ea35 | 529 | } else { |
1da177e4 | 530 | *err = -EIO; |
b80697c1 | 531 | goto out_err; |
1da177e4 | 532 | } |
b80697c1 JK |
533 | |
534 | out_err: | |
535 | fi = NULL; | |
536 | if (fibh->sbh != fibh->ebh) | |
537 | brelse(fibh->ebh); | |
538 | brelse(fibh->sbh); | |
539 | out_ok: | |
540 | brelse(epos.bh); | |
541 | kfree(name); | |
542 | return fi; | |
1da177e4 LT |
543 | } |
544 | ||
545 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
546 | struct udf_fileident_bh *fibh, |
547 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
548 | { |
549 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 550 | |
1da177e4 | 551 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
5ca4e4be | 552 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
28de7948 | 553 | |
1da177e4 LT |
554 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
555 | } | |
556 | ||
cb00ea35 CG |
557 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
558 | struct nameidata *nd) | |
1da177e4 LT |
559 | { |
560 | struct udf_fileident_bh fibh; | |
561 | struct inode *inode; | |
562 | struct fileIdentDesc cfi, *fi; | |
563 | int err; | |
48d6d8ff | 564 | struct udf_inode_info *iinfo; |
1da177e4 | 565 | |
871a2931 | 566 | dquot_initialize(dir); |
907f4554 | 567 | |
1da177e4 LT |
568 | lock_kernel(); |
569 | inode = udf_new_inode(dir, mode, &err); | |
cb00ea35 | 570 | if (!inode) { |
1da177e4 LT |
571 | unlock_kernel(); |
572 | return err; | |
573 | } | |
574 | ||
48d6d8ff MS |
575 | iinfo = UDF_I(inode); |
576 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
1da177e4 LT |
577 | inode->i_data.a_ops = &udf_adinicb_aops; |
578 | else | |
579 | inode->i_data.a_ops = &udf_aops; | |
580 | inode->i_op = &udf_file_inode_operations; | |
581 | inode->i_fop = &udf_file_operations; | |
1da177e4 LT |
582 | mark_inode_dirty(inode); |
583 | ||
4b11111a MS |
584 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
585 | if (!fi) { | |
cb00ea35 | 586 | inode->i_nlink--; |
1da177e4 LT |
587 | mark_inode_dirty(inode); |
588 | iput(inode); | |
589 | unlock_kernel(); | |
590 | return err; | |
591 | } | |
592 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 593 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 594 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 595 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 596 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 597 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 598 | mark_inode_dirty(dir); |
1da177e4 | 599 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
600 | brelse(fibh.ebh); |
601 | brelse(fibh.sbh); | |
1da177e4 LT |
602 | unlock_kernel(); |
603 | d_instantiate(dentry, inode); | |
28de7948 | 604 | |
1da177e4 LT |
605 | return 0; |
606 | } | |
607 | ||
cb00ea35 CG |
608 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
609 | dev_t rdev) | |
1da177e4 | 610 | { |
cb00ea35 | 611 | struct inode *inode; |
1da177e4 LT |
612 | struct udf_fileident_bh fibh; |
613 | struct fileIdentDesc cfi, *fi; | |
614 | int err; | |
48d6d8ff | 615 | struct udf_inode_info *iinfo; |
1da177e4 LT |
616 | |
617 | if (!old_valid_dev(rdev)) | |
618 | return -EINVAL; | |
619 | ||
871a2931 | 620 | dquot_initialize(dir); |
907f4554 | 621 | |
1da177e4 LT |
622 | lock_kernel(); |
623 | err = -EIO; | |
624 | inode = udf_new_inode(dir, mode, &err); | |
625 | if (!inode) | |
626 | goto out; | |
627 | ||
48d6d8ff | 628 | iinfo = UDF_I(inode); |
1da177e4 | 629 | init_special_inode(inode, mode, rdev); |
4b11111a MS |
630 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
631 | if (!fi) { | |
cb00ea35 | 632 | inode->i_nlink--; |
1da177e4 LT |
633 | mark_inode_dirty(inode); |
634 | iput(inode); | |
635 | unlock_kernel(); | |
636 | return err; | |
637 | } | |
638 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 639 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 640 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 641 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 642 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 643 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 644 | mark_inode_dirty(dir); |
1da177e4 LT |
645 | mark_inode_dirty(inode); |
646 | ||
647 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
648 | brelse(fibh.ebh); |
649 | brelse(fibh.sbh); | |
1da177e4 LT |
650 | d_instantiate(dentry, inode); |
651 | err = 0; | |
28de7948 CG |
652 | |
653 | out: | |
1da177e4 LT |
654 | unlock_kernel(); |
655 | return err; | |
656 | } | |
657 | ||
cb00ea35 | 658 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 659 | { |
cb00ea35 | 660 | struct inode *inode; |
1da177e4 LT |
661 | struct udf_fileident_bh fibh; |
662 | struct fileIdentDesc cfi, *fi; | |
663 | int err; | |
48d6d8ff MS |
664 | struct udf_inode_info *dinfo = UDF_I(dir); |
665 | struct udf_inode_info *iinfo; | |
1da177e4 | 666 | |
871a2931 | 667 | dquot_initialize(dir); |
907f4554 | 668 | |
1da177e4 LT |
669 | lock_kernel(); |
670 | err = -EMLINK; | |
cb00ea35 | 671 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
672 | goto out; |
673 | ||
674 | err = -EIO; | |
a6c5a034 | 675 | inode = udf_new_inode(dir, S_IFDIR | mode, &err); |
1da177e4 LT |
676 | if (!inode) |
677 | goto out; | |
678 | ||
48d6d8ff | 679 | iinfo = UDF_I(inode); |
1da177e4 LT |
680 | inode->i_op = &udf_dir_inode_operations; |
681 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
682 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
683 | if (!fi) { | |
1da177e4 LT |
684 | inode->i_nlink--; |
685 | mark_inode_dirty(inode); | |
686 | iput(inode); | |
687 | goto out; | |
688 | } | |
689 | inode->i_nlink = 2; | |
690 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 691 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 692 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 693 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
694 | cfi.fileCharacteristics = |
695 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 696 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 697 | brelse(fibh.sbh); |
1da177e4 LT |
698 | mark_inode_dirty(inode); |
699 | ||
4b11111a MS |
700 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
701 | if (!fi) { | |
1da177e4 LT |
702 | inode->i_nlink = 0; |
703 | mark_inode_dirty(inode); | |
704 | iput(inode); | |
705 | goto out; | |
706 | } | |
707 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 708 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 709 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 710 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
711 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
712 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 713 | inc_nlink(dir); |
1da177e4 LT |
714 | mark_inode_dirty(dir); |
715 | d_instantiate(dentry, inode); | |
716 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
717 | brelse(fibh.ebh); |
718 | brelse(fibh.sbh); | |
1da177e4 | 719 | err = 0; |
28de7948 CG |
720 | |
721 | out: | |
1da177e4 LT |
722 | unlock_kernel(); |
723 | return err; | |
724 | } | |
725 | ||
726 | static int empty_dir(struct inode *dir) | |
727 | { | |
728 | struct fileIdentDesc *fi, cfi; | |
729 | struct udf_fileident_bh fibh; | |
730 | loff_t f_pos; | |
af793295 | 731 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 732 | int block; |
5ca4e4be | 733 | struct kernel_lb_addr eloc; |
ff116fc8 | 734 | uint32_t elen; |
60448b1d | 735 | sector_t offset; |
28de7948 | 736 | struct extent_position epos = {}; |
48d6d8ff | 737 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 738 | |
af793295 JK |
739 | f_pos = udf_ext0_offset(dir); |
740 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 741 | |
48d6d8ff | 742 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 743 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 744 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
745 | &epos, &eloc, &elen, &offset) == |
746 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
97e961fd | 747 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 748 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 749 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 750 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 751 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 752 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 753 | } else |
1da177e4 LT |
754 | offset = 0; |
755 | ||
4b11111a MS |
756 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
757 | if (!fibh.sbh) { | |
3bf25cb4 | 758 | brelse(epos.bh); |
1da177e4 LT |
759 | return 0; |
760 | } | |
cb00ea35 | 761 | } else { |
3bf25cb4 | 762 | brelse(epos.bh); |
1da177e4 LT |
763 | return 0; |
764 | } | |
765 | ||
af793295 | 766 | while (f_pos < size) { |
cb00ea35 CG |
767 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
768 | &elen, &offset); | |
cb00ea35 | 769 | if (!fi) { |
1da177e4 | 770 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
771 | brelse(fibh.ebh); |
772 | brelse(fibh.sbh); | |
773 | brelse(epos.bh); | |
1da177e4 LT |
774 | return 0; |
775 | } | |
776 | ||
28de7948 CG |
777 | if (cfi.lengthFileIdent && |
778 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 779 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
780 | brelse(fibh.ebh); |
781 | brelse(fibh.sbh); | |
782 | brelse(epos.bh); | |
1da177e4 LT |
783 | return 0; |
784 | } | |
785 | } | |
28de7948 | 786 | |
1da177e4 | 787 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
788 | brelse(fibh.ebh); |
789 | brelse(fibh.sbh); | |
790 | brelse(epos.bh); | |
28de7948 | 791 | |
1da177e4 LT |
792 | return 1; |
793 | } | |
794 | ||
cb00ea35 | 795 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
796 | { |
797 | int retval; | |
cb00ea35 | 798 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
799 | struct udf_fileident_bh fibh; |
800 | struct fileIdentDesc *fi, cfi; | |
5ca4e4be | 801 | struct kernel_lb_addr tloc; |
1da177e4 | 802 | |
871a2931 | 803 | dquot_initialize(dir); |
907f4554 | 804 | |
1da177e4 LT |
805 | retval = -ENOENT; |
806 | lock_kernel(); | |
9fbb76ce | 807 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
808 | if (!fi) |
809 | goto out; | |
810 | ||
811 | retval = -EIO; | |
812 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 813 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
814 | goto end_rmdir; |
815 | retval = -ENOTEMPTY; | |
816 | if (!empty_dir(inode)) | |
817 | goto end_rmdir; | |
818 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
819 | if (retval) | |
820 | goto end_rmdir; | |
821 | if (inode->i_nlink != 2) | |
822 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
823 | "empty directory has nlink != 2 (%d)", |
824 | inode->i_nlink); | |
ce71ec36 | 825 | clear_nlink(inode); |
1da177e4 | 826 | inode->i_size = 0; |
c007c06e | 827 | inode_dec_link_count(dir); |
4b11111a MS |
828 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
829 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
830 | mark_inode_dirty(dir); |
831 | ||
28de7948 | 832 | end_rmdir: |
1da177e4 | 833 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
834 | brelse(fibh.ebh); |
835 | brelse(fibh.sbh); | |
28de7948 CG |
836 | |
837 | out: | |
1da177e4 LT |
838 | unlock_kernel(); |
839 | return retval; | |
840 | } | |
841 | ||
cb00ea35 | 842 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
843 | { |
844 | int retval; | |
cb00ea35 | 845 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
846 | struct udf_fileident_bh fibh; |
847 | struct fileIdentDesc *fi; | |
848 | struct fileIdentDesc cfi; | |
5ca4e4be | 849 | struct kernel_lb_addr tloc; |
1da177e4 | 850 | |
871a2931 | 851 | dquot_initialize(dir); |
907f4554 | 852 | |
1da177e4 LT |
853 | retval = -ENOENT; |
854 | lock_kernel(); | |
9fbb76ce | 855 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
856 | if (!fi) |
857 | goto out; | |
858 | ||
859 | retval = -EIO; | |
860 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 861 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
862 | goto end_unlink; |
863 | ||
cb00ea35 | 864 | if (!inode->i_nlink) { |
1da177e4 | 865 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 866 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
867 | inode->i_nlink = 1; |
868 | } | |
869 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
870 | if (retval) | |
871 | goto end_unlink; | |
872 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
873 | mark_inode_dirty(dir); | |
9a53c3a7 | 874 | inode_dec_link_count(inode); |
1da177e4 LT |
875 | inode->i_ctime = dir->i_ctime; |
876 | retval = 0; | |
877 | ||
28de7948 | 878 | end_unlink: |
1da177e4 | 879 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
880 | brelse(fibh.ebh); |
881 | brelse(fibh.sbh); | |
28de7948 CG |
882 | |
883 | out: | |
1da177e4 LT |
884 | unlock_kernel(); |
885 | return retval; | |
886 | } | |
887 | ||
cb00ea35 CG |
888 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
889 | const char *symname) | |
1da177e4 | 890 | { |
cb00ea35 | 891 | struct inode *inode; |
1da177e4 | 892 | struct pathComponent *pc; |
391e8bbd | 893 | const char *compstart; |
1da177e4 | 894 | struct udf_fileident_bh fibh; |
28de7948 | 895 | struct extent_position epos = {}; |
1da177e4 LT |
896 | int eoffset, elen = 0; |
897 | struct fileIdentDesc *fi; | |
898 | struct fileIdentDesc cfi; | |
391e8bbd | 899 | uint8_t *ea; |
1da177e4 LT |
900 | int err; |
901 | int block; | |
391e8bbd | 902 | unsigned char *name = NULL; |
1da177e4 | 903 | int namelen; |
6c79e987 | 904 | struct buffer_head *bh; |
48d6d8ff | 905 | struct udf_inode_info *iinfo; |
1da177e4 | 906 | |
871a2931 | 907 | dquot_initialize(dir); |
907f4554 | 908 | |
1da177e4 | 909 | lock_kernel(); |
a6c5a034 | 910 | inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err); |
4b11111a | 911 | if (!inode) |
1da177e4 LT |
912 | goto out; |
913 | ||
b80697c1 JK |
914 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
915 | if (!name) { | |
916 | err = -ENOMEM; | |
917 | goto out_no_entry; | |
918 | } | |
919 | ||
48d6d8ff | 920 | iinfo = UDF_I(inode); |
1da177e4 | 921 | inode->i_data.a_ops = &udf_symlink_aops; |
c15d0fc0 | 922 | inode->i_op = &udf_symlink_inode_operations; |
1da177e4 | 923 | |
48d6d8ff | 924 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
5ca4e4be | 925 | struct kernel_lb_addr eloc; |
78e917d5 | 926 | uint32_t bsize; |
1da177e4 LT |
927 | |
928 | block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
929 | iinfo->i_location.partitionReferenceNum, |
930 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
931 | if (!block) |
932 | goto out_no_entry; | |
48d6d8ff | 933 | epos.block = iinfo->i_location; |
ff116fc8 JK |
934 | epos.offset = udf_file_entry_alloc_offset(inode); |
935 | epos.bh = NULL; | |
1da177e4 | 936 | eloc.logicalBlockNum = block; |
4b11111a | 937 | eloc.partitionReferenceNum = |
48d6d8ff | 938 | iinfo->i_location.partitionReferenceNum; |
78e917d5 HH |
939 | bsize = inode->i_sb->s_blocksize; |
940 | iinfo->i_lenExtents = bsize; | |
97e961fd | 941 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
3bf25cb4 | 942 | brelse(epos.bh); |
1da177e4 LT |
943 | |
944 | block = udf_get_pblock(inode->i_sb, block, | |
48d6d8ff | 945 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 946 | 0); |
2c948b3f | 947 | epos.bh = udf_tgetblk(inode->i_sb, block); |
ff116fc8 JK |
948 | lock_buffer(epos.bh); |
949 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
950 | set_buffer_uptodate(epos.bh); | |
951 | unlock_buffer(epos.bh); | |
952 | mark_buffer_dirty_inode(epos.bh, inode); | |
953 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
954 | } else |
955 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 LT |
956 | |
957 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
958 | pc = (struct pathComponent *)ea; | |
959 | ||
cb00ea35 CG |
960 | if (*symname == '/') { |
961 | do { | |
1da177e4 LT |
962 | symname++; |
963 | } while (*symname == '/'); | |
964 | ||
965 | pc->componentType = 1; | |
966 | pc->lengthComponentIdent = 0; | |
967 | pc->componentFileVersionNum = 0; | |
1da177e4 LT |
968 | elen += sizeof(struct pathComponent); |
969 | } | |
970 | ||
971 | err = -ENAMETOOLONG; | |
972 | ||
cb00ea35 | 973 | while (*symname) { |
1da177e4 LT |
974 | if (elen + sizeof(struct pathComponent) > eoffset) |
975 | goto out_no_entry; | |
976 | ||
977 | pc = (struct pathComponent *)(ea + elen); | |
978 | ||
391e8bbd | 979 | compstart = symname; |
1da177e4 | 980 | |
cb00ea35 | 981 | do { |
1da177e4 LT |
982 | symname++; |
983 | } while (*symname && *symname != '/'); | |
984 | ||
985 | pc->componentType = 5; | |
986 | pc->lengthComponentIdent = 0; | |
987 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
988 | if (compstart[0] == '.') { |
989 | if ((symname - compstart) == 1) | |
1da177e4 | 990 | pc->componentType = 4; |
4b11111a MS |
991 | else if ((symname - compstart) == 2 && |
992 | compstart[1] == '.') | |
1da177e4 LT |
993 | pc->componentType = 3; |
994 | } | |
995 | ||
cb00ea35 | 996 | if (pc->componentType == 5) { |
28de7948 CG |
997 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
998 | symname - compstart); | |
999 | if (!namelen) | |
1da177e4 LT |
1000 | goto out_no_entry; |
1001 | ||
4b11111a MS |
1002 | if (elen + sizeof(struct pathComponent) + namelen > |
1003 | eoffset) | |
1da177e4 LT |
1004 | goto out_no_entry; |
1005 | else | |
1006 | pc->lengthComponentIdent = namelen; | |
1007 | ||
1008 | memcpy(pc->componentIdent, name, namelen); | |
1009 | } | |
1010 | ||
1011 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1012 | ||
cb00ea35 CG |
1013 | if (*symname) { |
1014 | do { | |
1da177e4 LT |
1015 | symname++; |
1016 | } while (*symname == '/'); | |
1017 | } | |
1018 | } | |
1019 | ||
3bf25cb4 | 1020 | brelse(epos.bh); |
1da177e4 | 1021 | inode->i_size = elen; |
48d6d8ff MS |
1022 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1023 | iinfo->i_lenAlloc = inode->i_size; | |
2c948b3f JK |
1024 | else |
1025 | udf_truncate_tail_extent(inode); | |
1da177e4 LT |
1026 | mark_inode_dirty(inode); |
1027 | ||
4b11111a MS |
1028 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1029 | if (!fi) | |
1da177e4 LT |
1030 | goto out_no_entry; |
1031 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 1032 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
6c79e987 MS |
1033 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1034 | if (bh) { | |
4b11111a MS |
1035 | struct logicalVolIntegrityDesc *lvid = |
1036 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1037 | struct logicalVolHeaderDesc *lvhd; |
1038 | uint64_t uniqueID; | |
4b11111a MS |
1039 | lvhd = (struct logicalVolHeaderDesc *) |
1040 | lvid->logicalVolContentsUse; | |
1da177e4 | 1041 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1042 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1043 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1044 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1045 | uniqueID += 16; | |
1046 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1047 | mark_buffer_dirty(bh); |
1da177e4 LT |
1048 | } |
1049 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1050 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1051 | mark_inode_dirty(dir); |
1da177e4 | 1052 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1053 | brelse(fibh.ebh); |
1054 | brelse(fibh.sbh); | |
1da177e4 LT |
1055 | d_instantiate(dentry, inode); |
1056 | err = 0; | |
1057 | ||
28de7948 | 1058 | out: |
b80697c1 | 1059 | kfree(name); |
1da177e4 LT |
1060 | unlock_kernel(); |
1061 | return err; | |
1062 | ||
28de7948 | 1063 | out_no_entry: |
9a53c3a7 | 1064 | inode_dec_link_count(inode); |
1da177e4 LT |
1065 | iput(inode); |
1066 | goto out; | |
1067 | } | |
1068 | ||
cb00ea35 CG |
1069 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1070 | struct dentry *dentry) | |
1da177e4 LT |
1071 | { |
1072 | struct inode *inode = old_dentry->d_inode; | |
1073 | struct udf_fileident_bh fibh; | |
1074 | struct fileIdentDesc cfi, *fi; | |
1075 | int err; | |
6c79e987 | 1076 | struct buffer_head *bh; |
1da177e4 | 1077 | |
871a2931 | 1078 | dquot_initialize(dir); |
907f4554 | 1079 | |
1da177e4 | 1080 | lock_kernel(); |
cb00ea35 | 1081 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1082 | unlock_kernel(); |
1083 | return -EMLINK; | |
1084 | } | |
1085 | ||
4b11111a MS |
1086 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1087 | if (!fi) { | |
1da177e4 LT |
1088 | unlock_kernel(); |
1089 | return err; | |
1090 | } | |
1091 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1092 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1093 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1094 | if (bh) { | |
4b11111a MS |
1095 | struct logicalVolIntegrityDesc *lvid = |
1096 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1097 | struct logicalVolHeaderDesc *lvhd; |
1098 | uint64_t uniqueID; | |
4b11111a MS |
1099 | lvhd = (struct logicalVolHeaderDesc *) |
1100 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1101 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1102 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1103 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1104 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1105 | uniqueID += 16; | |
1106 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1107 | mark_buffer_dirty(bh); |
1da177e4 LT |
1108 | } |
1109 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1110 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1111 | mark_inode_dirty(dir); |
28de7948 | 1112 | |
1da177e4 | 1113 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1114 | brelse(fibh.ebh); |
1115 | brelse(fibh.sbh); | |
d8c76e6f | 1116 | inc_nlink(inode); |
1da177e4 LT |
1117 | inode->i_ctime = current_fs_time(inode->i_sb); |
1118 | mark_inode_dirty(inode); | |
1119 | atomic_inc(&inode->i_count); | |
1120 | d_instantiate(dentry, inode); | |
1121 | unlock_kernel(); | |
28de7948 | 1122 | |
1da177e4 LT |
1123 | return 0; |
1124 | } | |
1125 | ||
1126 | /* Anybody can rename anything with this: the permission checks are left to the | |
1127 | * higher-level routines. | |
1128 | */ | |
cb00ea35 CG |
1129 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1130 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1131 | { |
cb00ea35 CG |
1132 | struct inode *old_inode = old_dentry->d_inode; |
1133 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1134 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1135 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1136 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1137 | struct buffer_head *dir_bh = NULL; |
1138 | int retval = -ENOENT; | |
5ca4e4be | 1139 | struct kernel_lb_addr tloc; |
48d6d8ff | 1140 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 | 1141 | |
871a2931 CH |
1142 | dquot_initialize(old_dir); |
1143 | dquot_initialize(new_dir); | |
907f4554 | 1144 | |
1da177e4 | 1145 | lock_kernel(); |
9fbb76ce | 1146 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
4b11111a | 1147 | if (ofi) { |
1da177e4 | 1148 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1149 | brelse(ofibh.ebh); |
1150 | brelse(ofibh.sbh); | |
1da177e4 LT |
1151 | } |
1152 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
97e961fd | 1153 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
cb00ea35 | 1154 | != old_inode->i_ino) |
1da177e4 LT |
1155 | goto end_rename; |
1156 | ||
9fbb76ce | 1157 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
cb00ea35 CG |
1158 | if (nfi) { |
1159 | if (!new_inode) { | |
1da177e4 | 1160 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1161 | brelse(nfibh.ebh); |
1162 | brelse(nfibh.sbh); | |
1da177e4 LT |
1163 | nfi = NULL; |
1164 | } | |
1165 | } | |
cb00ea35 | 1166 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1167 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1168 | |
cb00ea35 | 1169 | if (new_inode) { |
1da177e4 LT |
1170 | retval = -ENOTEMPTY; |
1171 | if (!empty_dir(new_inode)) | |
1172 | goto end_rename; | |
1173 | } | |
1174 | retval = -EIO; | |
48d6d8ff | 1175 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1176 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1177 | old_iinfo->i_ext.i_data - |
1178 | (old_iinfo->i_efe ? | |
4b11111a MS |
1179 | sizeof(struct extendedFileEntry) : |
1180 | sizeof(struct fileEntry)), | |
1181 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1182 | } else { |
1da177e4 LT |
1183 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1184 | if (!dir_bh) | |
1185 | goto end_rename; | |
4b11111a MS |
1186 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1187 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1188 | } |
1189 | if (!dir_fi) | |
1190 | goto end_rename; | |
1191 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
97e961fd | 1192 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
4b11111a | 1193 | old_dir->i_ino) |
1da177e4 LT |
1194 | goto end_rename; |
1195 | ||
1196 | retval = -EMLINK; | |
4b11111a MS |
1197 | if (!new_inode && |
1198 | new_dir->i_nlink >= | |
1199 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1200 | goto end_rename; |
1201 | } | |
cb00ea35 | 1202 | if (!nfi) { |
4b11111a MS |
1203 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1204 | &retval); | |
1da177e4 LT |
1205 | if (!nfi) |
1206 | goto end_rename; | |
1207 | } | |
1208 | ||
1209 | /* | |
1210 | * Like most other Unix systems, set the ctime for inodes on a | |
1211 | * rename. | |
1212 | */ | |
1213 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1214 | mark_inode_dirty(old_inode); | |
1215 | ||
1216 | /* | |
1217 | * ok, that's it | |
1218 | */ | |
1219 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1220 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
5ca4e4be | 1221 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
1da177e4 LT |
1222 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
1223 | ||
1224 | /* The old fid may have moved - find it again */ | |
9fbb76ce | 1225 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
1da177e4 LT |
1226 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
1227 | ||
cb00ea35 | 1228 | if (new_inode) { |
1da177e4 | 1229 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1230 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1231 | } |
1232 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1233 | mark_inode_dirty(old_dir); | |
1234 | ||
cb00ea35 | 1235 | if (dir_fi) { |
c0b34438 | 1236 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1237 | udf_update_tag((char *)dir_fi, |
1238 | (sizeof(struct fileIdentDesc) + | |
1239 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1240 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1241 | mark_inode_dirty(old_inode); |
4b11111a | 1242 | else |
1da177e4 | 1243 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1244 | |
9a53c3a7 | 1245 | inode_dec_link_count(old_dir); |
4b11111a | 1246 | if (new_inode) |
9a53c3a7 | 1247 | inode_dec_link_count(new_inode); |
4b11111a | 1248 | else { |
d8c76e6f | 1249 | inc_nlink(new_dir); |
1da177e4 LT |
1250 | mark_inode_dirty(new_dir); |
1251 | } | |
1252 | } | |
1253 | ||
cb00ea35 | 1254 | if (ofi) { |
1da177e4 | 1255 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1256 | brelse(ofibh.ebh); |
1257 | brelse(ofibh.sbh); | |
1da177e4 LT |
1258 | } |
1259 | ||
1260 | retval = 0; | |
1261 | ||
28de7948 | 1262 | end_rename: |
3bf25cb4 | 1263 | brelse(dir_bh); |
cb00ea35 | 1264 | if (nfi) { |
1da177e4 | 1265 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1266 | brelse(nfibh.ebh); |
1267 | brelse(nfibh.sbh); | |
1da177e4 LT |
1268 | } |
1269 | unlock_kernel(); | |
28de7948 | 1270 | |
1da177e4 LT |
1271 | return retval; |
1272 | } | |
1273 | ||
221e583a RR |
1274 | static struct dentry *udf_get_parent(struct dentry *child) |
1275 | { | |
97e961fd | 1276 | struct kernel_lb_addr tloc; |
221e583a | 1277 | struct inode *inode = NULL; |
9fbb76ce | 1278 | struct qstr dotdot = {.name = "..", .len = 2}; |
221e583a RR |
1279 | struct fileIdentDesc cfi; |
1280 | struct udf_fileident_bh fibh; | |
1281 | ||
221e583a RR |
1282 | lock_kernel(); |
1283 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) | |
1284 | goto out_unlock; | |
1285 | ||
1286 | if (fibh.sbh != fibh.ebh) | |
1287 | brelse(fibh.ebh); | |
1288 | brelse(fibh.sbh); | |
1289 | ||
97e961fd PE |
1290 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
1291 | inode = udf_iget(child->d_inode->i_sb, &tloc); | |
221e583a RR |
1292 | if (!inode) |
1293 | goto out_unlock; | |
1294 | unlock_kernel(); | |
1295 | ||
44003728 | 1296 | return d_obtain_alias(inode); |
221e583a RR |
1297 | out_unlock: |
1298 | unlock_kernel(); | |
1299 | return ERR_PTR(-EACCES); | |
1300 | } | |
1301 | ||
1302 | ||
1303 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1304 | u16 partref, __u32 generation) | |
1305 | { | |
1306 | struct inode *inode; | |
5ca4e4be | 1307 | struct kernel_lb_addr loc; |
221e583a RR |
1308 | |
1309 | if (block == 0) | |
1310 | return ERR_PTR(-ESTALE); | |
1311 | ||
1312 | loc.logicalBlockNum = block; | |
1313 | loc.partitionReferenceNum = partref; | |
97e961fd | 1314 | inode = udf_iget(sb, &loc); |
221e583a RR |
1315 | |
1316 | if (inode == NULL) | |
1317 | return ERR_PTR(-ENOMEM); | |
1318 | ||
1319 | if (generation && inode->i_generation != generation) { | |
1320 | iput(inode); | |
1321 | return ERR_PTR(-ESTALE); | |
1322 | } | |
44003728 | 1323 | return d_obtain_alias(inode); |
221e583a RR |
1324 | } |
1325 | ||
1326 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1327 | struct fid *fid, int fh_len, int fh_type) | |
1328 | { | |
1329 | if ((fh_len != 3 && fh_len != 5) || | |
1330 | (fh_type != FILEID_UDF_WITH_PARENT && | |
1331 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1332 | return NULL; | |
1333 | ||
1334 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1335 | fid->udf.generation); | |
1336 | } | |
1337 | ||
1338 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1339 | struct fid *fid, int fh_len, int fh_type) | |
1340 | { | |
1341 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) | |
1342 | return NULL; | |
1343 | ||
1344 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1345 | fid->udf.parent_partref, | |
1346 | fid->udf.parent_generation); | |
1347 | } | |
1348 | static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, | |
1349 | int connectable) | |
1350 | { | |
1351 | int len = *lenp; | |
1352 | struct inode *inode = de->d_inode; | |
5ca4e4be | 1353 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
221e583a RR |
1354 | struct fid *fid = (struct fid *)fh; |
1355 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1356 | ||
1357 | if (len < 3 || (connectable && len < 5)) | |
1358 | return 255; | |
1359 | ||
1360 | *lenp = 3; | |
1361 | fid->udf.block = location.logicalBlockNum; | |
1362 | fid->udf.partref = location.partitionReferenceNum; | |
1363 | fid->udf.generation = inode->i_generation; | |
1364 | ||
1365 | if (connectable && !S_ISDIR(inode->i_mode)) { | |
1366 | spin_lock(&de->d_lock); | |
1367 | inode = de->d_parent->d_inode; | |
1368 | location = UDF_I(inode)->i_location; | |
1369 | fid->udf.parent_block = location.logicalBlockNum; | |
1370 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1371 | fid->udf.parent_generation = inode->i_generation; | |
1372 | spin_unlock(&de->d_lock); | |
1373 | *lenp = 5; | |
1374 | type = FILEID_UDF_WITH_PARENT; | |
1375 | } | |
1376 | ||
1377 | return type; | |
1378 | } | |
1379 | ||
1380 | const struct export_operations udf_export_ops = { | |
1381 | .encode_fh = udf_encode_fh, | |
1382 | .fh_to_dentry = udf_fh_to_dentry, | |
1383 | .fh_to_parent = udf_fh_to_parent, | |
1384 | .get_parent = udf_get_parent, | |
1385 | }; | |
1386 | ||
c5ef1c42 | 1387 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1388 | .lookup = udf_lookup, |
1389 | .create = udf_create, | |
c15d0fc0 | 1390 | .setattr = udf_setattr, |
28de7948 CG |
1391 | .link = udf_link, |
1392 | .unlink = udf_unlink, | |
1393 | .symlink = udf_symlink, | |
1394 | .mkdir = udf_mkdir, | |
1395 | .rmdir = udf_rmdir, | |
1396 | .mknod = udf_mknod, | |
1397 | .rename = udf_rename, | |
1da177e4 | 1398 | }; |
c15d0fc0 DM |
1399 | const struct inode_operations udf_symlink_inode_operations = { |
1400 | .readlink = generic_readlink, | |
1401 | .follow_link = page_follow_link_light, | |
1402 | .put_link = page_put_link, | |
1403 | .setattr = udf_setattr, | |
1404 | }; |