Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * namei.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998-2004 Ben Fennema | |
14 | * (C) 1999-2000 Stelias Computing Inc | |
15 | * | |
16 | * HISTORY | |
17 | * | |
18 | * 12/12/98 blf Created. Split out the lookup code from dir.c | |
19 | * 04/19/99 blf link, mknod, symlink support | |
20 | */ | |
21 | ||
22 | #include "udfdecl.h" | |
23 | ||
24 | #include "udf_i.h" | |
25 | #include "udf_sb.h" | |
26 | #include <linux/string.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
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: |
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; | |
582 | inode->i_mode = mode; | |
583 | mark_inode_dirty(inode); | |
584 | ||
4b11111a MS |
585 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
586 | if (!fi) { | |
cb00ea35 | 587 | inode->i_nlink--; |
1da177e4 LT |
588 | mark_inode_dirty(inode); |
589 | iput(inode); | |
590 | unlock_kernel(); | |
591 | return err; | |
592 | } | |
593 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 594 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 595 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 596 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 597 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 598 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 599 | mark_inode_dirty(dir); |
1da177e4 | 600 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
601 | brelse(fibh.ebh); |
602 | brelse(fibh.sbh); | |
1da177e4 LT |
603 | unlock_kernel(); |
604 | d_instantiate(dentry, inode); | |
28de7948 | 605 | |
1da177e4 LT |
606 | return 0; |
607 | } | |
608 | ||
cb00ea35 CG |
609 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
610 | dev_t rdev) | |
1da177e4 | 611 | { |
cb00ea35 | 612 | struct inode *inode; |
1da177e4 LT |
613 | struct udf_fileident_bh fibh; |
614 | struct fileIdentDesc cfi, *fi; | |
615 | int err; | |
48d6d8ff | 616 | struct udf_inode_info *iinfo; |
1da177e4 LT |
617 | |
618 | if (!old_valid_dev(rdev)) | |
619 | return -EINVAL; | |
620 | ||
871a2931 | 621 | dquot_initialize(dir); |
907f4554 | 622 | |
1da177e4 LT |
623 | lock_kernel(); |
624 | err = -EIO; | |
625 | inode = udf_new_inode(dir, mode, &err); | |
626 | if (!inode) | |
627 | goto out; | |
628 | ||
48d6d8ff | 629 | iinfo = UDF_I(inode); |
7706bb39 | 630 | inode->i_uid = current_fsuid(); |
1da177e4 | 631 | init_special_inode(inode, mode, rdev); |
4b11111a MS |
632 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
633 | if (!fi) { | |
cb00ea35 | 634 | inode->i_nlink--; |
1da177e4 LT |
635 | mark_inode_dirty(inode); |
636 | iput(inode); | |
637 | unlock_kernel(); | |
638 | return err; | |
639 | } | |
640 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 641 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 642 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 643 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 644 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 645 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 646 | mark_inode_dirty(dir); |
1da177e4 LT |
647 | mark_inode_dirty(inode); |
648 | ||
649 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
650 | brelse(fibh.ebh); |
651 | brelse(fibh.sbh); | |
1da177e4 LT |
652 | d_instantiate(dentry, inode); |
653 | err = 0; | |
28de7948 CG |
654 | |
655 | out: | |
1da177e4 LT |
656 | unlock_kernel(); |
657 | return err; | |
658 | } | |
659 | ||
cb00ea35 | 660 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
1da177e4 | 661 | { |
cb00ea35 | 662 | struct inode *inode; |
1da177e4 LT |
663 | struct udf_fileident_bh fibh; |
664 | struct fileIdentDesc cfi, *fi; | |
665 | int err; | |
48d6d8ff MS |
666 | struct udf_inode_info *dinfo = UDF_I(dir); |
667 | struct udf_inode_info *iinfo; | |
1da177e4 | 668 | |
871a2931 | 669 | dquot_initialize(dir); |
907f4554 | 670 | |
1da177e4 LT |
671 | lock_kernel(); |
672 | err = -EMLINK; | |
cb00ea35 | 673 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
1da177e4 LT |
674 | goto out; |
675 | ||
676 | err = -EIO; | |
677 | inode = udf_new_inode(dir, S_IFDIR, &err); | |
678 | if (!inode) | |
679 | goto out; | |
680 | ||
48d6d8ff | 681 | iinfo = UDF_I(inode); |
1da177e4 LT |
682 | inode->i_op = &udf_dir_inode_operations; |
683 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
684 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
685 | if (!fi) { | |
1da177e4 LT |
686 | inode->i_nlink--; |
687 | mark_inode_dirty(inode); | |
688 | iput(inode); | |
689 | goto out; | |
690 | } | |
691 | inode->i_nlink = 2; | |
692 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 693 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 694 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 695 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
696 | cfi.fileCharacteristics = |
697 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 698 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 699 | brelse(fibh.sbh); |
1da177e4 LT |
700 | inode->i_mode = S_IFDIR | mode; |
701 | if (dir->i_mode & S_ISGID) | |
702 | inode->i_mode |= S_ISGID; | |
703 | mark_inode_dirty(inode); | |
704 | ||
4b11111a MS |
705 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
706 | if (!fi) { | |
1da177e4 LT |
707 | inode->i_nlink = 0; |
708 | mark_inode_dirty(inode); | |
709 | iput(inode); | |
710 | goto out; | |
711 | } | |
712 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 713 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 714 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 715 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
716 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
717 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 718 | inc_nlink(dir); |
1da177e4 LT |
719 | mark_inode_dirty(dir); |
720 | d_instantiate(dentry, inode); | |
721 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
722 | brelse(fibh.ebh); |
723 | brelse(fibh.sbh); | |
1da177e4 | 724 | err = 0; |
28de7948 CG |
725 | |
726 | out: | |
1da177e4 LT |
727 | unlock_kernel(); |
728 | return err; | |
729 | } | |
730 | ||
731 | static int empty_dir(struct inode *dir) | |
732 | { | |
733 | struct fileIdentDesc *fi, cfi; | |
734 | struct udf_fileident_bh fibh; | |
735 | loff_t f_pos; | |
af793295 | 736 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 737 | int block; |
5ca4e4be | 738 | struct kernel_lb_addr eloc; |
ff116fc8 | 739 | uint32_t elen; |
60448b1d | 740 | sector_t offset; |
28de7948 | 741 | struct extent_position epos = {}; |
48d6d8ff | 742 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 743 | |
af793295 JK |
744 | f_pos = udf_ext0_offset(dir); |
745 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 746 | |
48d6d8ff | 747 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 748 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 749 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
750 | &epos, &eloc, &elen, &offset) == |
751 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
97e961fd | 752 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 753 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 754 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 755 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 756 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 757 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 758 | } else |
1da177e4 LT |
759 | offset = 0; |
760 | ||
4b11111a MS |
761 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
762 | if (!fibh.sbh) { | |
3bf25cb4 | 763 | brelse(epos.bh); |
1da177e4 LT |
764 | return 0; |
765 | } | |
cb00ea35 | 766 | } else { |
3bf25cb4 | 767 | brelse(epos.bh); |
1da177e4 LT |
768 | return 0; |
769 | } | |
770 | ||
af793295 | 771 | while (f_pos < size) { |
cb00ea35 CG |
772 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
773 | &elen, &offset); | |
cb00ea35 | 774 | if (!fi) { |
1da177e4 | 775 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
776 | brelse(fibh.ebh); |
777 | brelse(fibh.sbh); | |
778 | brelse(epos.bh); | |
1da177e4 LT |
779 | return 0; |
780 | } | |
781 | ||
28de7948 CG |
782 | if (cfi.lengthFileIdent && |
783 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 784 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
785 | brelse(fibh.ebh); |
786 | brelse(fibh.sbh); | |
787 | brelse(epos.bh); | |
1da177e4 LT |
788 | return 0; |
789 | } | |
790 | } | |
28de7948 | 791 | |
1da177e4 | 792 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
793 | brelse(fibh.ebh); |
794 | brelse(fibh.sbh); | |
795 | brelse(epos.bh); | |
28de7948 | 796 | |
1da177e4 LT |
797 | return 1; |
798 | } | |
799 | ||
cb00ea35 | 800 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
801 | { |
802 | int retval; | |
cb00ea35 | 803 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
804 | struct udf_fileident_bh fibh; |
805 | struct fileIdentDesc *fi, cfi; | |
5ca4e4be | 806 | struct kernel_lb_addr tloc; |
1da177e4 | 807 | |
871a2931 | 808 | dquot_initialize(dir); |
907f4554 | 809 | |
1da177e4 LT |
810 | retval = -ENOENT; |
811 | lock_kernel(); | |
9fbb76ce | 812 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
813 | if (!fi) |
814 | goto out; | |
815 | ||
816 | retval = -EIO; | |
817 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 818 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
819 | goto end_rmdir; |
820 | retval = -ENOTEMPTY; | |
821 | if (!empty_dir(inode)) | |
822 | goto end_rmdir; | |
823 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
824 | if (retval) | |
825 | goto end_rmdir; | |
826 | if (inode->i_nlink != 2) | |
827 | udf_warning(inode->i_sb, "udf_rmdir", | |
cb00ea35 CG |
828 | "empty directory has nlink != 2 (%d)", |
829 | inode->i_nlink); | |
ce71ec36 | 830 | clear_nlink(inode); |
1da177e4 | 831 | inode->i_size = 0; |
c007c06e | 832 | inode_dec_link_count(dir); |
4b11111a MS |
833 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
834 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
835 | mark_inode_dirty(dir); |
836 | ||
28de7948 | 837 | end_rmdir: |
1da177e4 | 838 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
839 | brelse(fibh.ebh); |
840 | brelse(fibh.sbh); | |
28de7948 CG |
841 | |
842 | out: | |
1da177e4 LT |
843 | unlock_kernel(); |
844 | return retval; | |
845 | } | |
846 | ||
cb00ea35 | 847 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
848 | { |
849 | int retval; | |
cb00ea35 | 850 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
851 | struct udf_fileident_bh fibh; |
852 | struct fileIdentDesc *fi; | |
853 | struct fileIdentDesc cfi; | |
5ca4e4be | 854 | struct kernel_lb_addr tloc; |
1da177e4 | 855 | |
871a2931 | 856 | dquot_initialize(dir); |
907f4554 | 857 | |
1da177e4 LT |
858 | retval = -ENOENT; |
859 | lock_kernel(); | |
9fbb76ce | 860 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
861 | if (!fi) |
862 | goto out; | |
863 | ||
864 | retval = -EIO; | |
865 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 866 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
867 | goto end_unlink; |
868 | ||
cb00ea35 | 869 | if (!inode->i_nlink) { |
1da177e4 | 870 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 871 | inode->i_ino, inode->i_nlink); |
1da177e4 LT |
872 | inode->i_nlink = 1; |
873 | } | |
874 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
875 | if (retval) | |
876 | goto end_unlink; | |
877 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
878 | mark_inode_dirty(dir); | |
9a53c3a7 | 879 | inode_dec_link_count(inode); |
1da177e4 LT |
880 | inode->i_ctime = dir->i_ctime; |
881 | retval = 0; | |
882 | ||
28de7948 | 883 | end_unlink: |
1da177e4 | 884 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
885 | brelse(fibh.ebh); |
886 | brelse(fibh.sbh); | |
28de7948 CG |
887 | |
888 | out: | |
1da177e4 LT |
889 | unlock_kernel(); |
890 | return retval; | |
891 | } | |
892 | ||
cb00ea35 CG |
893 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
894 | const char *symname) | |
1da177e4 | 895 | { |
cb00ea35 | 896 | struct inode *inode; |
1da177e4 LT |
897 | struct pathComponent *pc; |
898 | char *compstart; | |
899 | struct udf_fileident_bh fibh; | |
28de7948 | 900 | struct extent_position epos = {}; |
1da177e4 LT |
901 | int eoffset, elen = 0; |
902 | struct fileIdentDesc *fi; | |
903 | struct fileIdentDesc cfi; | |
904 | char *ea; | |
905 | int err; | |
906 | int block; | |
b80697c1 | 907 | char *name = NULL; |
1da177e4 | 908 | int namelen; |
6c79e987 | 909 | struct buffer_head *bh; |
48d6d8ff | 910 | struct udf_inode_info *iinfo; |
1da177e4 | 911 | |
871a2931 | 912 | dquot_initialize(dir); |
907f4554 | 913 | |
1da177e4 | 914 | lock_kernel(); |
4b11111a MS |
915 | inode = udf_new_inode(dir, S_IFLNK, &err); |
916 | if (!inode) | |
1da177e4 LT |
917 | goto out; |
918 | ||
b80697c1 JK |
919 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
920 | if (!name) { | |
921 | err = -ENOMEM; | |
922 | goto out_no_entry; | |
923 | } | |
924 | ||
48d6d8ff | 925 | iinfo = UDF_I(inode); |
1da177e4 LT |
926 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
927 | inode->i_data.a_ops = &udf_symlink_aops; | |
928 | inode->i_op = &page_symlink_inode_operations; | |
929 | ||
48d6d8ff | 930 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
5ca4e4be | 931 | struct kernel_lb_addr eloc; |
78e917d5 | 932 | uint32_t bsize; |
1da177e4 LT |
933 | |
934 | block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
935 | iinfo->i_location.partitionReferenceNum, |
936 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
937 | if (!block) |
938 | goto out_no_entry; | |
48d6d8ff | 939 | epos.block = iinfo->i_location; |
ff116fc8 JK |
940 | epos.offset = udf_file_entry_alloc_offset(inode); |
941 | epos.bh = NULL; | |
1da177e4 | 942 | eloc.logicalBlockNum = block; |
4b11111a | 943 | eloc.partitionReferenceNum = |
48d6d8ff | 944 | iinfo->i_location.partitionReferenceNum; |
78e917d5 HH |
945 | bsize = inode->i_sb->s_blocksize; |
946 | iinfo->i_lenExtents = bsize; | |
97e961fd | 947 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
3bf25cb4 | 948 | brelse(epos.bh); |
1da177e4 LT |
949 | |
950 | block = udf_get_pblock(inode->i_sb, block, | |
48d6d8ff | 951 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 952 | 0); |
2c948b3f | 953 | epos.bh = udf_tgetblk(inode->i_sb, block); |
ff116fc8 JK |
954 | lock_buffer(epos.bh); |
955 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
956 | set_buffer_uptodate(epos.bh); | |
957 | unlock_buffer(epos.bh); | |
958 | mark_buffer_dirty_inode(epos.bh, inode); | |
959 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
960 | } else |
961 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 LT |
962 | |
963 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); | |
964 | pc = (struct pathComponent *)ea; | |
965 | ||
cb00ea35 CG |
966 | if (*symname == '/') { |
967 | do { | |
1da177e4 LT |
968 | symname++; |
969 | } while (*symname == '/'); | |
970 | ||
971 | pc->componentType = 1; | |
972 | pc->lengthComponentIdent = 0; | |
973 | pc->componentFileVersionNum = 0; | |
1da177e4 LT |
974 | elen += sizeof(struct pathComponent); |
975 | } | |
976 | ||
977 | err = -ENAMETOOLONG; | |
978 | ||
cb00ea35 | 979 | while (*symname) { |
1da177e4 LT |
980 | if (elen + sizeof(struct pathComponent) > eoffset) |
981 | goto out_no_entry; | |
982 | ||
983 | pc = (struct pathComponent *)(ea + elen); | |
984 | ||
985 | compstart = (char *)symname; | |
986 | ||
cb00ea35 | 987 | do { |
1da177e4 LT |
988 | symname++; |
989 | } while (*symname && *symname != '/'); | |
990 | ||
991 | pc->componentType = 5; | |
992 | pc->lengthComponentIdent = 0; | |
993 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
994 | if (compstart[0] == '.') { |
995 | if ((symname - compstart) == 1) | |
1da177e4 | 996 | pc->componentType = 4; |
4b11111a MS |
997 | else if ((symname - compstart) == 2 && |
998 | compstart[1] == '.') | |
1da177e4 LT |
999 | pc->componentType = 3; |
1000 | } | |
1001 | ||
cb00ea35 | 1002 | if (pc->componentType == 5) { |
28de7948 CG |
1003 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
1004 | symname - compstart); | |
1005 | if (!namelen) | |
1da177e4 LT |
1006 | goto out_no_entry; |
1007 | ||
4b11111a MS |
1008 | if (elen + sizeof(struct pathComponent) + namelen > |
1009 | eoffset) | |
1da177e4 LT |
1010 | goto out_no_entry; |
1011 | else | |
1012 | pc->lengthComponentIdent = namelen; | |
1013 | ||
1014 | memcpy(pc->componentIdent, name, namelen); | |
1015 | } | |
1016 | ||
1017 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
1018 | ||
cb00ea35 CG |
1019 | if (*symname) { |
1020 | do { | |
1da177e4 LT |
1021 | symname++; |
1022 | } while (*symname == '/'); | |
1023 | } | |
1024 | } | |
1025 | ||
3bf25cb4 | 1026 | brelse(epos.bh); |
1da177e4 | 1027 | inode->i_size = elen; |
48d6d8ff MS |
1028 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1029 | iinfo->i_lenAlloc = inode->i_size; | |
2c948b3f JK |
1030 | else |
1031 | udf_truncate_tail_extent(inode); | |
1da177e4 LT |
1032 | mark_inode_dirty(inode); |
1033 | ||
4b11111a MS |
1034 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1035 | if (!fi) | |
1da177e4 LT |
1036 | goto out_no_entry; |
1037 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 1038 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
6c79e987 MS |
1039 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1040 | if (bh) { | |
4b11111a MS |
1041 | struct logicalVolIntegrityDesc *lvid = |
1042 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1043 | struct logicalVolHeaderDesc *lvhd; |
1044 | uint64_t uniqueID; | |
4b11111a MS |
1045 | lvhd = (struct logicalVolHeaderDesc *) |
1046 | lvid->logicalVolContentsUse; | |
1da177e4 | 1047 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1048 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1049 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1050 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1051 | uniqueID += 16; | |
1052 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1053 | mark_buffer_dirty(bh); |
1da177e4 LT |
1054 | } |
1055 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1056 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1057 | mark_inode_dirty(dir); |
1da177e4 | 1058 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1059 | brelse(fibh.ebh); |
1060 | brelse(fibh.sbh); | |
1da177e4 LT |
1061 | d_instantiate(dentry, inode); |
1062 | err = 0; | |
1063 | ||
28de7948 | 1064 | out: |
b80697c1 | 1065 | kfree(name); |
1da177e4 LT |
1066 | unlock_kernel(); |
1067 | return err; | |
1068 | ||
28de7948 | 1069 | out_no_entry: |
9a53c3a7 | 1070 | inode_dec_link_count(inode); |
1da177e4 LT |
1071 | iput(inode); |
1072 | goto out; | |
1073 | } | |
1074 | ||
cb00ea35 CG |
1075 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1076 | struct dentry *dentry) | |
1da177e4 LT |
1077 | { |
1078 | struct inode *inode = old_dentry->d_inode; | |
1079 | struct udf_fileident_bh fibh; | |
1080 | struct fileIdentDesc cfi, *fi; | |
1081 | int err; | |
6c79e987 | 1082 | struct buffer_head *bh; |
1da177e4 | 1083 | |
871a2931 | 1084 | dquot_initialize(dir); |
907f4554 | 1085 | |
1da177e4 | 1086 | lock_kernel(); |
cb00ea35 | 1087 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
1da177e4 LT |
1088 | unlock_kernel(); |
1089 | return -EMLINK; | |
1090 | } | |
1091 | ||
4b11111a MS |
1092 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1093 | if (!fi) { | |
1da177e4 LT |
1094 | unlock_kernel(); |
1095 | return err; | |
1096 | } | |
1097 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1098 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
6c79e987 MS |
1099 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
1100 | if (bh) { | |
4b11111a MS |
1101 | struct logicalVolIntegrityDesc *lvid = |
1102 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1da177e4 LT |
1103 | struct logicalVolHeaderDesc *lvhd; |
1104 | uint64_t uniqueID; | |
4b11111a MS |
1105 | lvhd = (struct logicalVolHeaderDesc *) |
1106 | (lvid->logicalVolContentsUse); | |
1da177e4 | 1107 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
28de7948 CG |
1108 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
1109 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); | |
1da177e4 LT |
1110 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
1111 | uniqueID += 16; | |
1112 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
6c79e987 | 1113 | mark_buffer_dirty(bh); |
1da177e4 LT |
1114 | } |
1115 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1116 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1117 | mark_inode_dirty(dir); |
28de7948 | 1118 | |
1da177e4 | 1119 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1120 | brelse(fibh.ebh); |
1121 | brelse(fibh.sbh); | |
d8c76e6f | 1122 | inc_nlink(inode); |
1da177e4 LT |
1123 | inode->i_ctime = current_fs_time(inode->i_sb); |
1124 | mark_inode_dirty(inode); | |
1125 | atomic_inc(&inode->i_count); | |
1126 | d_instantiate(dentry, inode); | |
1127 | unlock_kernel(); | |
28de7948 | 1128 | |
1da177e4 LT |
1129 | return 0; |
1130 | } | |
1131 | ||
1132 | /* Anybody can rename anything with this: the permission checks are left to the | |
1133 | * higher-level routines. | |
1134 | */ | |
cb00ea35 CG |
1135 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1136 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1137 | { |
cb00ea35 CG |
1138 | struct inode *old_inode = old_dentry->d_inode; |
1139 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1140 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1141 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1142 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1143 | struct buffer_head *dir_bh = NULL; |
1144 | int retval = -ENOENT; | |
5ca4e4be | 1145 | struct kernel_lb_addr tloc; |
48d6d8ff | 1146 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 | 1147 | |
871a2931 CH |
1148 | dquot_initialize(old_dir); |
1149 | dquot_initialize(new_dir); | |
907f4554 | 1150 | |
1da177e4 | 1151 | lock_kernel(); |
9fbb76ce | 1152 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
4b11111a | 1153 | if (ofi) { |
1da177e4 | 1154 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1155 | brelse(ofibh.ebh); |
1156 | brelse(ofibh.sbh); | |
1da177e4 LT |
1157 | } |
1158 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
97e961fd | 1159 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
cb00ea35 | 1160 | != old_inode->i_ino) |
1da177e4 LT |
1161 | goto end_rename; |
1162 | ||
9fbb76ce | 1163 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
cb00ea35 CG |
1164 | if (nfi) { |
1165 | if (!new_inode) { | |
1da177e4 | 1166 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1167 | brelse(nfibh.ebh); |
1168 | brelse(nfibh.sbh); | |
1da177e4 LT |
1169 | nfi = NULL; |
1170 | } | |
1171 | } | |
cb00ea35 | 1172 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1173 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1174 | |
cb00ea35 | 1175 | if (new_inode) { |
1da177e4 LT |
1176 | retval = -ENOTEMPTY; |
1177 | if (!empty_dir(new_inode)) | |
1178 | goto end_rename; | |
1179 | } | |
1180 | retval = -EIO; | |
48d6d8ff | 1181 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1182 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1183 | old_iinfo->i_ext.i_data - |
1184 | (old_iinfo->i_efe ? | |
4b11111a MS |
1185 | sizeof(struct extendedFileEntry) : |
1186 | sizeof(struct fileEntry)), | |
1187 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1188 | } else { |
1da177e4 LT |
1189 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1190 | if (!dir_bh) | |
1191 | goto end_rename; | |
4b11111a MS |
1192 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1193 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1194 | } |
1195 | if (!dir_fi) | |
1196 | goto end_rename; | |
1197 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
97e961fd | 1198 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
4b11111a | 1199 | old_dir->i_ino) |
1da177e4 LT |
1200 | goto end_rename; |
1201 | ||
1202 | retval = -EMLINK; | |
4b11111a MS |
1203 | if (!new_inode && |
1204 | new_dir->i_nlink >= | |
1205 | (256 << sizeof(new_dir->i_nlink)) - 1) | |
1da177e4 LT |
1206 | goto end_rename; |
1207 | } | |
cb00ea35 | 1208 | if (!nfi) { |
4b11111a MS |
1209 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1210 | &retval); | |
1da177e4 LT |
1211 | if (!nfi) |
1212 | goto end_rename; | |
1213 | } | |
1214 | ||
1215 | /* | |
1216 | * Like most other Unix systems, set the ctime for inodes on a | |
1217 | * rename. | |
1218 | */ | |
1219 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1220 | mark_inode_dirty(old_inode); | |
1221 | ||
1222 | /* | |
1223 | * ok, that's it | |
1224 | */ | |
1225 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1226 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
5ca4e4be | 1227 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
1da177e4 LT |
1228 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
1229 | ||
1230 | /* The old fid may have moved - find it again */ | |
9fbb76ce | 1231 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
1da177e4 LT |
1232 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
1233 | ||
cb00ea35 | 1234 | if (new_inode) { |
1da177e4 | 1235 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1236 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1237 | } |
1238 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1239 | mark_inode_dirty(old_dir); | |
1240 | ||
cb00ea35 | 1241 | if (dir_fi) { |
c0b34438 | 1242 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1243 | udf_update_tag((char *)dir_fi, |
1244 | (sizeof(struct fileIdentDesc) + | |
1245 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1246 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1247 | mark_inode_dirty(old_inode); |
4b11111a | 1248 | else |
1da177e4 | 1249 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1250 | |
9a53c3a7 | 1251 | inode_dec_link_count(old_dir); |
4b11111a | 1252 | if (new_inode) |
9a53c3a7 | 1253 | inode_dec_link_count(new_inode); |
4b11111a | 1254 | else { |
d8c76e6f | 1255 | inc_nlink(new_dir); |
1da177e4 LT |
1256 | mark_inode_dirty(new_dir); |
1257 | } | |
1258 | } | |
1259 | ||
cb00ea35 | 1260 | if (ofi) { |
1da177e4 | 1261 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1262 | brelse(ofibh.ebh); |
1263 | brelse(ofibh.sbh); | |
1da177e4 LT |
1264 | } |
1265 | ||
1266 | retval = 0; | |
1267 | ||
28de7948 | 1268 | end_rename: |
3bf25cb4 | 1269 | brelse(dir_bh); |
cb00ea35 | 1270 | if (nfi) { |
1da177e4 | 1271 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1272 | brelse(nfibh.ebh); |
1273 | brelse(nfibh.sbh); | |
1da177e4 LT |
1274 | } |
1275 | unlock_kernel(); | |
28de7948 | 1276 | |
1da177e4 LT |
1277 | return retval; |
1278 | } | |
1279 | ||
221e583a RR |
1280 | static struct dentry *udf_get_parent(struct dentry *child) |
1281 | { | |
97e961fd | 1282 | struct kernel_lb_addr tloc; |
221e583a | 1283 | struct inode *inode = NULL; |
9fbb76ce | 1284 | struct qstr dotdot = {.name = "..", .len = 2}; |
221e583a RR |
1285 | struct fileIdentDesc cfi; |
1286 | struct udf_fileident_bh fibh; | |
1287 | ||
221e583a RR |
1288 | lock_kernel(); |
1289 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) | |
1290 | goto out_unlock; | |
1291 | ||
1292 | if (fibh.sbh != fibh.ebh) | |
1293 | brelse(fibh.ebh); | |
1294 | brelse(fibh.sbh); | |
1295 | ||
97e961fd PE |
1296 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
1297 | inode = udf_iget(child->d_inode->i_sb, &tloc); | |
221e583a RR |
1298 | if (!inode) |
1299 | goto out_unlock; | |
1300 | unlock_kernel(); | |
1301 | ||
44003728 | 1302 | return d_obtain_alias(inode); |
221e583a RR |
1303 | out_unlock: |
1304 | unlock_kernel(); | |
1305 | return ERR_PTR(-EACCES); | |
1306 | } | |
1307 | ||
1308 | ||
1309 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1310 | u16 partref, __u32 generation) | |
1311 | { | |
1312 | struct inode *inode; | |
5ca4e4be | 1313 | struct kernel_lb_addr loc; |
221e583a RR |
1314 | |
1315 | if (block == 0) | |
1316 | return ERR_PTR(-ESTALE); | |
1317 | ||
1318 | loc.logicalBlockNum = block; | |
1319 | loc.partitionReferenceNum = partref; | |
97e961fd | 1320 | inode = udf_iget(sb, &loc); |
221e583a RR |
1321 | |
1322 | if (inode == NULL) | |
1323 | return ERR_PTR(-ENOMEM); | |
1324 | ||
1325 | if (generation && inode->i_generation != generation) { | |
1326 | iput(inode); | |
1327 | return ERR_PTR(-ESTALE); | |
1328 | } | |
44003728 | 1329 | return d_obtain_alias(inode); |
221e583a RR |
1330 | } |
1331 | ||
1332 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1333 | struct fid *fid, int fh_len, int fh_type) | |
1334 | { | |
1335 | if ((fh_len != 3 && fh_len != 5) || | |
1336 | (fh_type != FILEID_UDF_WITH_PARENT && | |
1337 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1338 | return NULL; | |
1339 | ||
1340 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1341 | fid->udf.generation); | |
1342 | } | |
1343 | ||
1344 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1345 | struct fid *fid, int fh_len, int fh_type) | |
1346 | { | |
1347 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) | |
1348 | return NULL; | |
1349 | ||
1350 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1351 | fid->udf.parent_partref, | |
1352 | fid->udf.parent_generation); | |
1353 | } | |
1354 | static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, | |
1355 | int connectable) | |
1356 | { | |
1357 | int len = *lenp; | |
1358 | struct inode *inode = de->d_inode; | |
5ca4e4be | 1359 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
221e583a RR |
1360 | struct fid *fid = (struct fid *)fh; |
1361 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1362 | ||
1363 | if (len < 3 || (connectable && len < 5)) | |
1364 | return 255; | |
1365 | ||
1366 | *lenp = 3; | |
1367 | fid->udf.block = location.logicalBlockNum; | |
1368 | fid->udf.partref = location.partitionReferenceNum; | |
1369 | fid->udf.generation = inode->i_generation; | |
1370 | ||
1371 | if (connectable && !S_ISDIR(inode->i_mode)) { | |
1372 | spin_lock(&de->d_lock); | |
1373 | inode = de->d_parent->d_inode; | |
1374 | location = UDF_I(inode)->i_location; | |
1375 | fid->udf.parent_block = location.logicalBlockNum; | |
1376 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1377 | fid->udf.parent_generation = inode->i_generation; | |
1378 | spin_unlock(&de->d_lock); | |
1379 | *lenp = 5; | |
1380 | type = FILEID_UDF_WITH_PARENT; | |
1381 | } | |
1382 | ||
1383 | return type; | |
1384 | } | |
1385 | ||
1386 | const struct export_operations udf_export_ops = { | |
1387 | .encode_fh = udf_encode_fh, | |
1388 | .fh_to_dentry = udf_fh_to_dentry, | |
1389 | .fh_to_parent = udf_fh_to_parent, | |
1390 | .get_parent = udf_get_parent, | |
1391 | }; | |
1392 | ||
c5ef1c42 | 1393 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1394 | .lookup = udf_lookup, |
1395 | .create = udf_create, | |
1396 | .link = udf_link, | |
1397 | .unlink = udf_unlink, | |
1398 | .symlink = udf_symlink, | |
1399 | .mkdir = udf_mkdir, | |
1400 | .rmdir = udf_rmdir, | |
1401 | .mknod = udf_mknod, | |
1402 | .rename = udf_rename, | |
1da177e4 | 1403 | }; |