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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> | |
1da177e4 | 30 | #include <linux/buffer_head.h> |
e8edc6e0 | 31 | #include <linux/sched.h> |
f845fced | 32 | #include <linux/crc-itu-t.h> |
221e583a | 33 | #include <linux/exportfs.h> |
1da177e4 | 34 | |
391e8bbd AV |
35 | static inline int udf_match(int len1, const unsigned char *name1, int len2, |
36 | const unsigned char *name2) | |
1da177e4 LT |
37 | { |
38 | if (len1 != len2) | |
39 | return 0; | |
28de7948 | 40 | |
1da177e4 LT |
41 | return !memcmp(name1, name2, len1); |
42 | } | |
43 | ||
44 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, | |
cb00ea35 | 45 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
4b11111a | 46 | uint8_t *impuse, uint8_t *fileident) |
1da177e4 | 47 | { |
5ca4e4be | 48 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag); |
1da177e4 | 49 | uint16_t crc; |
1da177e4 LT |
50 | int offset; |
51 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); | |
52 | uint8_t lfi = cfi->lengthFileIdent; | |
53 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - | |
28de7948 | 54 | sizeof(struct fileIdentDesc); |
1da177e4 LT |
55 | int adinicb = 0; |
56 | ||
c0b34438 | 57 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 LT |
58 | adinicb = 1; |
59 | ||
60 | offset = fibh->soffset + sizeof(struct fileIdentDesc); | |
61 | ||
cb00ea35 | 62 | if (impuse) { |
28de7948 CG |
63 | if (adinicb || (offset + liu < 0)) { |
64 | memcpy((uint8_t *)sfi->impUse, impuse, liu); | |
65 | } else if (offset >= 0) { | |
1da177e4 | 66 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
28de7948 CG |
67 | } else { |
68 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); | |
4b11111a MS |
69 | memcpy(fibh->ebh->b_data, impuse - offset, |
70 | liu + offset); | |
1da177e4 LT |
71 | } |
72 | } | |
73 | ||
74 | offset += liu; | |
75 | ||
cb00ea35 | 76 | if (fileident) { |
28de7948 CG |
77 | if (adinicb || (offset + lfi < 0)) { |
78 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); | |
79 | } else if (offset >= 0) { | |
1da177e4 | 80 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
28de7948 | 81 | } else { |
4b11111a MS |
82 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
83 | -offset); | |
84 | memcpy(fibh->ebh->b_data, fileident - offset, | |
85 | lfi + offset); | |
1da177e4 LT |
86 | } |
87 | } | |
88 | ||
89 | offset += lfi; | |
90 | ||
28de7948 CG |
91 | if (adinicb || (offset + padlen < 0)) { |
92 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); | |
93 | } else if (offset >= 0) { | |
1da177e4 | 94 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
28de7948 CG |
95 | } else { |
96 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); | |
1da177e4 LT |
97 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
98 | } | |
99 | ||
5ca4e4be PE |
100 | crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), |
101 | sizeof(struct fileIdentDesc) - sizeof(struct tag)); | |
28de7948 CG |
102 | |
103 | if (fibh->sbh == fibh->ebh) { | |
f845fced | 104 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
5ca4e4be | 105 | crclen + sizeof(struct tag) - |
f845fced | 106 | sizeof(struct fileIdentDesc)); |
28de7948 | 107 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
f845fced | 108 | crc = crc_itu_t(crc, fibh->ebh->b_data + |
4b11111a MS |
109 | sizeof(struct fileIdentDesc) + |
110 | fibh->soffset, | |
5ca4e4be | 111 | crclen + sizeof(struct tag) - |
f845fced | 112 | sizeof(struct fileIdentDesc)); |
28de7948 | 113 | } else { |
f845fced BC |
114 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
115 | -fibh->soffset - sizeof(struct fileIdentDesc)); | |
116 | crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); | |
1da177e4 LT |
117 | } |
118 | ||
119 | cfi->descTag.descCRC = cpu_to_le16(crc); | |
120 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); | |
3f2587bb | 121 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
1da177e4 | 122 | |
28de7948 | 123 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
4b11111a MS |
124 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
125 | sizeof(struct fileIdentDesc)); | |
28de7948 CG |
126 | } else { |
127 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); | |
128 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, | |
cb00ea35 | 129 | sizeof(struct fileIdentDesc) + fibh->soffset); |
1da177e4 LT |
130 | } |
131 | ||
28de7948 | 132 | if (adinicb) { |
1da177e4 | 133 | mark_inode_dirty(inode); |
28de7948 | 134 | } else { |
1da177e4 LT |
135 | if (fibh->sbh != fibh->ebh) |
136 | mark_buffer_dirty_inode(fibh->ebh, inode); | |
137 | mark_buffer_dirty_inode(fibh->sbh, inode); | |
138 | } | |
139 | return 0; | |
140 | } | |
141 | ||
cb00ea35 | 142 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
391e8bbd | 143 | const struct qstr *child, |
cb00ea35 CG |
144 | struct udf_fileident_bh *fibh, |
145 | struct fileIdentDesc *cfi) | |
1da177e4 | 146 | { |
cb00ea35 | 147 | struct fileIdentDesc *fi = NULL; |
1da177e4 LT |
148 | loff_t f_pos; |
149 | int block, flen; | |
391e8bbd AV |
150 | unsigned char *fname = NULL; |
151 | unsigned char *nameptr; | |
1da177e4 LT |
152 | uint8_t lfi; |
153 | uint16_t liu; | |
ec471dc4 | 154 | loff_t size; |
5ca4e4be | 155 | struct kernel_lb_addr eloc; |
ff116fc8 | 156 | uint32_t elen; |
60448b1d | 157 | sector_t offset; |
28de7948 | 158 | struct extent_position epos = {}; |
48d6d8ff | 159 | struct udf_inode_info *dinfo = UDF_I(dir); |
9fbb76ce AV |
160 | int isdotdot = child->len == 2 && |
161 | child->name[0] == '.' && child->name[1] == '.'; | |
1da177e4 | 162 | |
af793295 JK |
163 | size = udf_ext0_offset(dir) + dir->i_size; |
164 | f_pos = udf_ext0_offset(dir); | |
1da177e4 | 165 | |
b80697c1 | 166 | fibh->sbh = fibh->ebh = NULL; |
af793295 | 167 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
b80697c1 JK |
168 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
169 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
170 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) | |
171 | goto out_err; | |
97e961fd | 172 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 173 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 174 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 175 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 176 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 177 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 178 | } else |
1da177e4 LT |
179 | offset = 0; |
180 | ||
4b11111a | 181 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
b80697c1 JK |
182 | if (!fibh->sbh) |
183 | goto out_err; | |
1da177e4 LT |
184 | } |
185 | ||
b80697c1 JK |
186 | fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
187 | if (!fname) | |
188 | goto out_err; | |
189 | ||
af793295 | 190 | while (f_pos < size) { |
cb00ea35 CG |
191 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
192 | &elen, &offset); | |
b80697c1 JK |
193 | if (!fi) |
194 | goto out_err; | |
1da177e4 LT |
195 | |
196 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
197 | lfi = cfi->lengthFileIdent; | |
198 | ||
cb00ea35 | 199 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 200 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 201 | } else { |
1da177e4 LT |
202 | int poffset; /* Unpaded ending offset */ |
203 | ||
4b11111a MS |
204 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
205 | liu + lfi; | |
1da177e4 | 206 | |
4b11111a MS |
207 | if (poffset >= lfi) |
208 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
209 | poffset - lfi); | |
210 | else { | |
1da177e4 | 211 | nameptr = fname; |
4b11111a MS |
212 | memcpy(nameptr, fi->fileIdent + liu, |
213 | lfi - poffset); | |
214 | memcpy(nameptr + lfi - poffset, | |
215 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
216 | } |
217 | } | |
218 | ||
cb00ea35 CG |
219 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
220 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) | |
1da177e4 LT |
221 | continue; |
222 | } | |
cb00ea35 CG |
223 | |
224 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
225 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) | |
1da177e4 LT |
226 | continue; |
227 | } | |
228 | ||
221e583a | 229 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
a4264b3f JJ |
230 | isdotdot) |
231 | goto out_ok; | |
221e583a | 232 | |
1da177e4 LT |
233 | if (!lfi) |
234 | continue; | |
235 | ||
4b11111a | 236 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
9fbb76ce | 237 | if (flen && udf_match(flen, fname, child->len, child->name)) |
b80697c1 | 238 | goto out_ok; |
1da177e4 | 239 | } |
28de7948 | 240 | |
b80697c1 JK |
241 | out_err: |
242 | fi = NULL; | |
1da177e4 | 243 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
244 | brelse(fibh->ebh); |
245 | brelse(fibh->sbh); | |
b80697c1 | 246 | out_ok: |
3bf25cb4 | 247 | brelse(epos.bh); |
b80697c1 | 248 | kfree(fname); |
28de7948 | 249 | |
b80697c1 | 250 | return fi; |
1da177e4 LT |
251 | } |
252 | ||
cb00ea35 | 253 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 254 | unsigned int flags) |
1da177e4 LT |
255 | { |
256 | struct inode *inode = NULL; | |
db9a369e | 257 | struct fileIdentDesc cfi; |
1da177e4 LT |
258 | struct udf_fileident_bh fibh; |
259 | ||
cb00ea35 | 260 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
261 | return ERR_PTR(-ENAMETOOLONG); |
262 | ||
1da177e4 LT |
263 | #ifdef UDF_RECOVERY |
264 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 265 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
5ca4e4be | 266 | struct kernel_lb_addr lb = { |
28de7948 | 267 | .logicalBlockNum = 0, |
4b11111a MS |
268 | .partitionReferenceNum = |
269 | simple_strtoul(dentry->d_name.name + 3, | |
270 | NULL, 0), | |
28de7948 | 271 | }; |
1da177e4 | 272 | inode = udf_iget(dir->i_sb, lb); |
6d3d5e86 JK |
273 | if (IS_ERR(inode)) |
274 | return inode; | |
4b11111a | 275 | } else |
28de7948 | 276 | #endif /* UDF_RECOVERY */ |
1da177e4 | 277 | |
9fbb76ce | 278 | if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { |
97e961fd PE |
279 | struct kernel_lb_addr loc; |
280 | ||
1da177e4 | 281 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
282 | brelse(fibh.ebh); |
283 | brelse(fibh.sbh); | |
1da177e4 | 284 | |
97e961fd PE |
285 | loc = lelb_to_cpu(cfi.icb.extLocation); |
286 | inode = udf_iget(dir->i_sb, &loc); | |
6d3d5e86 JK |
287 | if (IS_ERR(inode)) |
288 | return ERR_CAST(inode); | |
1da177e4 | 289 | } |
28de7948 | 290 | |
221e583a | 291 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
292 | } |
293 | ||
cb00ea35 CG |
294 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
295 | struct dentry *dentry, | |
296 | struct udf_fileident_bh *fibh, | |
297 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 298 | { |
6c79e987 | 299 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 300 | struct fileIdentDesc *fi = NULL; |
391e8bbd | 301 | unsigned char *name = NULL; |
1da177e4 LT |
302 | int namelen; |
303 | loff_t f_pos; | |
af793295 | 304 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
305 | int nfidlen; |
306 | uint8_t lfi; | |
307 | uint16_t liu; | |
308 | int block; | |
5ca4e4be | 309 | struct kernel_lb_addr eloc; |
9afadc4b | 310 | uint32_t elen = 0; |
60448b1d | 311 | sector_t offset; |
28de7948 | 312 | struct extent_position epos = {}; |
48d6d8ff | 313 | struct udf_inode_info *dinfo; |
1da177e4 | 314 | |
b80697c1 JK |
315 | fibh->sbh = fibh->ebh = NULL; |
316 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); | |
317 | if (!name) { | |
318 | *err = -ENOMEM; | |
319 | goto out_err; | |
320 | } | |
321 | ||
cb00ea35 CG |
322 | if (dentry) { |
323 | if (!dentry->d_name.len) { | |
1da177e4 | 324 | *err = -EINVAL; |
b80697c1 | 325 | goto out_err; |
1da177e4 | 326 | } |
4b11111a MS |
327 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
328 | dentry->d_name.len); | |
329 | if (!namelen) { | |
1da177e4 | 330 | *err = -ENAMETOOLONG; |
b80697c1 | 331 | goto out_err; |
1da177e4 | 332 | } |
28de7948 | 333 | } else { |
1da177e4 | 334 | namelen = 0; |
28de7948 | 335 | } |
1da177e4 LT |
336 | |
337 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
338 | ||
af793295 | 339 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 340 | |
af793295 | 341 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 342 | dinfo = UDF_I(dir); |
b80697c1 JK |
343 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
344 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
345 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { | |
346 | block = udf_get_lb_pblock(dir->i_sb, | |
97e961fd | 347 | &dinfo->i_location, 0); |
b80697c1 JK |
348 | fibh->soffset = fibh->eoffset = sb->s_blocksize; |
349 | goto add; | |
350 | } | |
97e961fd | 351 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 352 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 353 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 354 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 355 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 356 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 357 | } else |
1da177e4 LT |
358 | offset = 0; |
359 | ||
4b11111a MS |
360 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
361 | if (!fibh->sbh) { | |
1da177e4 | 362 | *err = -EIO; |
b80697c1 | 363 | goto out_err; |
1da177e4 LT |
364 | } |
365 | ||
48d6d8ff | 366 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 LT |
367 | } |
368 | ||
af793295 | 369 | while (f_pos < size) { |
cb00ea35 CG |
370 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
371 | &elen, &offset); | |
1da177e4 | 372 | |
cb00ea35 | 373 | if (!fi) { |
1da177e4 | 374 | *err = -EIO; |
b80697c1 | 375 | goto out_err; |
1da177e4 LT |
376 | } |
377 | ||
378 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
379 | lfi = cfi->lengthFileIdent; | |
380 | ||
cb00ea35 | 381 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
382 | if (((sizeof(struct fileIdentDesc) + |
383 | liu + lfi + 3) & ~3) == nfidlen) { | |
1da177e4 LT |
384 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
385 | cfi->fileVersionNum = cpu_to_le16(1); | |
386 | cfi->fileCharacteristics = 0; | |
387 | cfi->lengthFileIdent = namelen; | |
388 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
389 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
390 | name)) | |
b80697c1 | 391 | goto out_ok; |
4b11111a | 392 | else { |
1da177e4 | 393 | *err = -EIO; |
b80697c1 | 394 | goto out_err; |
1da177e4 LT |
395 | } |
396 | } | |
397 | } | |
1da177e4 LT |
398 | } |
399 | ||
28de7948 | 400 | add: |
1da177e4 LT |
401 | f_pos += nfidlen; |
402 | ||
48d6d8ff | 403 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 404 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 405 | brelse(epos.bh); |
ff116fc8 | 406 | epos.bh = NULL; |
1da177e4 LT |
407 | fibh->soffset -= udf_ext0_offset(dir); |
408 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 409 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 410 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
411 | brelse(fibh->ebh); |
412 | brelse(fibh->sbh); | |
4b11111a MS |
413 | fibh->sbh = fibh->ebh = |
414 | udf_expand_dir_adinicb(dir, &block, err); | |
415 | if (!fibh->sbh) | |
b80697c1 | 416 | goto out_err; |
48d6d8ff | 417 | epos.block = dinfo->i_location; |
ff116fc8 | 418 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
419 | /* Load extent udf_expand_dir_adinicb() has created */ |
420 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
421 | } |
422 | ||
2c948b3f | 423 | /* Entry fits into current block? */ |
cb00ea35 | 424 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
425 | fibh->soffset = fibh->eoffset; |
426 | fibh->eoffset += nfidlen; | |
cb00ea35 | 427 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 428 | brelse(fibh->sbh); |
1da177e4 LT |
429 | fibh->sbh = fibh->ebh; |
430 | } | |
431 | ||
48d6d8ff MS |
432 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
433 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 434 | fi = (struct fileIdentDesc *) |
48d6d8ff | 435 | (dinfo->i_ext.i_data + |
c0b34438 | 436 | fibh->soffset - |
4b11111a | 437 | udf_ext0_offset(dir) + |
48d6d8ff | 438 | dinfo->i_lenEAttr); |
cb00ea35 | 439 | } else { |
4b11111a MS |
440 | block = eloc.logicalBlockNum + |
441 | ((elen - 1) >> | |
442 | dir->i_sb->s_blocksize_bits); | |
443 | fi = (struct fileIdentDesc *) | |
444 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 445 | } |
cb00ea35 | 446 | } else { |
2c948b3f JK |
447 | /* Round up last extent in the file */ |
448 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); | |
449 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
450 | epos.offset -= sizeof(struct short_ad); | |
451 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
452 | epos.offset -= sizeof(struct long_ad); | |
453 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
454 | dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize | |
455 | - 1) & ~(sb->s_blocksize - 1); | |
456 | ||
1da177e4 LT |
457 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
458 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 459 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 460 | brelse(fibh->sbh); |
1da177e4 LT |
461 | fibh->sbh = fibh->ebh; |
462 | } | |
463 | ||
464 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 465 | dir->i_sb->s_blocksize_bits); |
4b11111a | 466 | fibh->ebh = udf_bread(dir, |
af793295 | 467 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
468 | if (!fibh->ebh) |
469 | goto out_err; | |
4651c590 JK |
470 | /* Extents could have been merged, invalidate our position */ |
471 | brelse(epos.bh); | |
472 | epos.bh = NULL; | |
473 | epos.block = dinfo->i_location; | |
474 | epos.offset = udf_file_entry_alloc_offset(dir); | |
1da177e4 | 475 | |
28de7948 | 476 | if (!fibh->soffset) { |
4651c590 JK |
477 | /* Find the freshly allocated block */ |
478 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
479 | (EXT_RECORDED_ALLOCATED >> 30)) | |
480 | ; | |
481 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
28de7948 | 482 | dir->i_sb->s_blocksize_bits); |
3bf25cb4 | 483 | brelse(fibh->sbh); |
1da177e4 LT |
484 | fibh->sbh = fibh->ebh; |
485 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 486 | } else { |
1da177e4 | 487 | fi = (struct fileIdentDesc *) |
4b11111a MS |
488 | (fibh->sbh->b_data + sb->s_blocksize + |
489 | fibh->soffset); | |
1da177e4 LT |
490 | } |
491 | } | |
492 | ||
493 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 494 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a | 495 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
5ca4e4be | 496 | sizeof(struct tag)); |
1da177e4 | 497 | else |
4b11111a | 498 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
5ca4e4be | 499 | sizeof(struct tag)); |
1da177e4 LT |
500 | cfi->fileVersionNum = cpu_to_le16(1); |
501 | cfi->lengthFileIdent = namelen; | |
502 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 503 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 504 | dir->i_size += nfidlen; |
48d6d8ff MS |
505 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
506 | dinfo->i_lenAlloc += nfidlen; | |
2c948b3f JK |
507 | else { |
508 | /* Find the last extent and truncate it to proper size */ | |
509 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
510 | (EXT_RECORDED_ALLOCATED >> 30)) | |
511 | ; | |
512 | elen -= dinfo->i_lenExtents - dir->i_size; | |
513 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
514 | epos.offset -= sizeof(struct short_ad); | |
515 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
516 | epos.offset -= sizeof(struct long_ad); | |
517 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
518 | dinfo->i_lenExtents = dir->i_size; | |
519 | } | |
520 | ||
1da177e4 | 521 | mark_inode_dirty(dir); |
b80697c1 | 522 | goto out_ok; |
cb00ea35 | 523 | } else { |
1da177e4 | 524 | *err = -EIO; |
b80697c1 | 525 | goto out_err; |
1da177e4 | 526 | } |
b80697c1 JK |
527 | |
528 | out_err: | |
529 | fi = NULL; | |
530 | if (fibh->sbh != fibh->ebh) | |
531 | brelse(fibh->ebh); | |
532 | brelse(fibh->sbh); | |
533 | out_ok: | |
534 | brelse(epos.bh); | |
535 | kfree(name); | |
536 | return fi; | |
1da177e4 LT |
537 | } |
538 | ||
539 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
540 | struct udf_fileident_bh *fibh, |
541 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
542 | { |
543 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 544 | |
1da177e4 | 545 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
5ca4e4be | 546 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
28de7948 | 547 | |
1da177e4 LT |
548 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
549 | } | |
550 | ||
d2be51cb | 551 | static int udf_add_nondir(struct dentry *dentry, struct inode *inode) |
1da177e4 | 552 | { |
d2be51cb AV |
553 | struct udf_inode_info *iinfo = UDF_I(inode); |
554 | struct inode *dir = dentry->d_parent->d_inode; | |
1da177e4 | 555 | struct udf_fileident_bh fibh; |
1da177e4 LT |
556 | struct fileIdentDesc cfi, *fi; |
557 | int err; | |
1da177e4 | 558 | |
4b11111a | 559 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
d2be51cb | 560 | if (unlikely(!fi)) { |
6d6b77f1 | 561 | inode_dec_link_count(inode); |
1da177e4 | 562 | iput(inode); |
1da177e4 LT |
563 | return err; |
564 | } | |
565 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 566 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 567 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 568 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 569 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 570 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 571 | mark_inode_dirty(dir); |
1da177e4 | 572 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
573 | brelse(fibh.ebh); |
574 | brelse(fibh.sbh); | |
1da177e4 | 575 | d_instantiate(dentry, inode); |
28de7948 | 576 | |
1da177e4 LT |
577 | return 0; |
578 | } | |
579 | ||
d2be51cb AV |
580 | static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
581 | bool excl) | |
582 | { | |
583 | struct inode *inode; | |
584 | int err; | |
585 | ||
586 | inode = udf_new_inode(dir, mode, &err); | |
587 | if (!inode) { | |
588 | return err; | |
589 | } | |
590 | ||
591 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
592 | inode->i_data.a_ops = &udf_adinicb_aops; | |
593 | else | |
594 | inode->i_data.a_ops = &udf_aops; | |
595 | inode->i_op = &udf_file_inode_operations; | |
596 | inode->i_fop = &udf_file_operations; | |
597 | mark_inode_dirty(inode); | |
598 | ||
599 | return udf_add_nondir(dentry, inode); | |
600 | } | |
601 | ||
656d09df AV |
602 | static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
603 | { | |
604 | struct inode *inode; | |
605 | struct udf_inode_info *iinfo; | |
606 | int err; | |
607 | ||
608 | inode = udf_new_inode(dir, mode, &err); | |
609 | if (!inode) | |
610 | return err; | |
611 | ||
612 | iinfo = UDF_I(inode); | |
613 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
614 | inode->i_data.a_ops = &udf_adinicb_aops; | |
615 | else | |
616 | inode->i_data.a_ops = &udf_aops; | |
617 | inode->i_op = &udf_file_inode_operations; | |
618 | inode->i_fop = &udf_file_operations; | |
619 | mark_inode_dirty(inode); | |
620 | ||
621 | d_tmpfile(dentry, inode); | |
622 | return 0; | |
623 | } | |
624 | ||
1a67aafb | 625 | static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
cb00ea35 | 626 | dev_t rdev) |
1da177e4 | 627 | { |
cb00ea35 | 628 | struct inode *inode; |
1da177e4 LT |
629 | int err; |
630 | ||
631 | if (!old_valid_dev(rdev)) | |
632 | return -EINVAL; | |
633 | ||
1da177e4 LT |
634 | err = -EIO; |
635 | inode = udf_new_inode(dir, mode, &err); | |
636 | if (!inode) | |
1da177e4 | 637 | return err; |
28de7948 | 638 | |
d2be51cb AV |
639 | init_special_inode(inode, mode, rdev); |
640 | return udf_add_nondir(dentry, inode); | |
1da177e4 LT |
641 | } |
642 | ||
18bb1db3 | 643 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
1da177e4 | 644 | { |
cb00ea35 | 645 | struct inode *inode; |
1da177e4 LT |
646 | struct udf_fileident_bh fibh; |
647 | struct fileIdentDesc cfi, *fi; | |
648 | int err; | |
48d6d8ff MS |
649 | struct udf_inode_info *dinfo = UDF_I(dir); |
650 | struct udf_inode_info *iinfo; | |
1da177e4 | 651 | |
1da177e4 | 652 | err = -EIO; |
a6c5a034 | 653 | inode = udf_new_inode(dir, S_IFDIR | mode, &err); |
1da177e4 LT |
654 | if (!inode) |
655 | goto out; | |
656 | ||
48d6d8ff | 657 | iinfo = UDF_I(inode); |
1da177e4 LT |
658 | inode->i_op = &udf_dir_inode_operations; |
659 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
660 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
661 | if (!fi) { | |
6d6b77f1 | 662 | inode_dec_link_count(inode); |
1da177e4 LT |
663 | iput(inode); |
664 | goto out; | |
665 | } | |
bfe86848 | 666 | set_nlink(inode, 2); |
1da177e4 | 667 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
48d6d8ff | 668 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 669 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 670 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
671 | cfi.fileCharacteristics = |
672 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 673 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 674 | brelse(fibh.sbh); |
1da177e4 LT |
675 | mark_inode_dirty(inode); |
676 | ||
4b11111a MS |
677 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
678 | if (!fi) { | |
6d6b77f1 | 679 | clear_nlink(inode); |
1da177e4 LT |
680 | mark_inode_dirty(inode); |
681 | iput(inode); | |
682 | goto out; | |
683 | } | |
684 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 685 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 686 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 687 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
688 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
689 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 690 | inc_nlink(dir); |
1da177e4 LT |
691 | mark_inode_dirty(dir); |
692 | d_instantiate(dentry, inode); | |
693 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
694 | brelse(fibh.ebh); |
695 | brelse(fibh.sbh); | |
1da177e4 | 696 | err = 0; |
28de7948 CG |
697 | |
698 | out: | |
1da177e4 LT |
699 | return err; |
700 | } | |
701 | ||
702 | static int empty_dir(struct inode *dir) | |
703 | { | |
704 | struct fileIdentDesc *fi, cfi; | |
705 | struct udf_fileident_bh fibh; | |
706 | loff_t f_pos; | |
af793295 | 707 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 708 | int block; |
5ca4e4be | 709 | struct kernel_lb_addr eloc; |
ff116fc8 | 710 | uint32_t elen; |
60448b1d | 711 | sector_t offset; |
28de7948 | 712 | struct extent_position epos = {}; |
48d6d8ff | 713 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 714 | |
af793295 JK |
715 | f_pos = udf_ext0_offset(dir); |
716 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 717 | |
48d6d8ff | 718 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 719 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 720 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
721 | &epos, &eloc, &elen, &offset) == |
722 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
97e961fd | 723 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 724 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 725 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 726 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 727 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 728 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 729 | } else |
1da177e4 LT |
730 | offset = 0; |
731 | ||
4b11111a MS |
732 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
733 | if (!fibh.sbh) { | |
3bf25cb4 | 734 | brelse(epos.bh); |
1da177e4 LT |
735 | return 0; |
736 | } | |
cb00ea35 | 737 | } else { |
3bf25cb4 | 738 | brelse(epos.bh); |
1da177e4 LT |
739 | return 0; |
740 | } | |
741 | ||
af793295 | 742 | while (f_pos < size) { |
cb00ea35 CG |
743 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
744 | &elen, &offset); | |
cb00ea35 | 745 | if (!fi) { |
1da177e4 | 746 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
747 | brelse(fibh.ebh); |
748 | brelse(fibh.sbh); | |
749 | brelse(epos.bh); | |
1da177e4 LT |
750 | return 0; |
751 | } | |
752 | ||
28de7948 CG |
753 | if (cfi.lengthFileIdent && |
754 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 755 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
756 | brelse(fibh.ebh); |
757 | brelse(fibh.sbh); | |
758 | brelse(epos.bh); | |
1da177e4 LT |
759 | return 0; |
760 | } | |
761 | } | |
28de7948 | 762 | |
1da177e4 | 763 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
764 | brelse(fibh.ebh); |
765 | brelse(fibh.sbh); | |
766 | brelse(epos.bh); | |
28de7948 | 767 | |
1da177e4 LT |
768 | return 1; |
769 | } | |
770 | ||
cb00ea35 | 771 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
772 | { |
773 | int retval; | |
cb00ea35 | 774 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
775 | struct udf_fileident_bh fibh; |
776 | struct fileIdentDesc *fi, cfi; | |
5ca4e4be | 777 | struct kernel_lb_addr tloc; |
1da177e4 LT |
778 | |
779 | retval = -ENOENT; | |
9fbb76ce | 780 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
781 | if (!fi) |
782 | goto out; | |
783 | ||
784 | retval = -EIO; | |
785 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 786 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
787 | goto end_rmdir; |
788 | retval = -ENOTEMPTY; | |
789 | if (!empty_dir(inode)) | |
790 | goto end_rmdir; | |
791 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
792 | if (retval) | |
793 | goto end_rmdir; | |
794 | if (inode->i_nlink != 2) | |
a40ecd7b JP |
795 | udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n", |
796 | inode->i_nlink); | |
ce71ec36 | 797 | clear_nlink(inode); |
1da177e4 | 798 | inode->i_size = 0; |
c007c06e | 799 | inode_dec_link_count(dir); |
4b11111a MS |
800 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
801 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
802 | mark_inode_dirty(dir); |
803 | ||
28de7948 | 804 | end_rmdir: |
1da177e4 | 805 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
806 | brelse(fibh.ebh); |
807 | brelse(fibh.sbh); | |
28de7948 CG |
808 | |
809 | out: | |
1da177e4 LT |
810 | return retval; |
811 | } | |
812 | ||
cb00ea35 | 813 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
814 | { |
815 | int retval; | |
cb00ea35 | 816 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
817 | struct udf_fileident_bh fibh; |
818 | struct fileIdentDesc *fi; | |
819 | struct fileIdentDesc cfi; | |
5ca4e4be | 820 | struct kernel_lb_addr tloc; |
1da177e4 LT |
821 | |
822 | retval = -ENOENT; | |
9fbb76ce | 823 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
824 | if (!fi) |
825 | goto out; | |
826 | ||
827 | retval = -EIO; | |
828 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 829 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
830 | goto end_unlink; |
831 | ||
cb00ea35 | 832 | if (!inode->i_nlink) { |
1da177e4 | 833 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 834 | inode->i_ino, inode->i_nlink); |
bfe86848 | 835 | set_nlink(inode, 1); |
1da177e4 LT |
836 | } |
837 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
838 | if (retval) | |
839 | goto end_unlink; | |
840 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
841 | mark_inode_dirty(dir); | |
9a53c3a7 | 842 | inode_dec_link_count(inode); |
1da177e4 LT |
843 | inode->i_ctime = dir->i_ctime; |
844 | retval = 0; | |
845 | ||
28de7948 | 846 | end_unlink: |
1da177e4 | 847 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
848 | brelse(fibh.ebh); |
849 | brelse(fibh.sbh); | |
28de7948 CG |
850 | |
851 | out: | |
1da177e4 LT |
852 | return retval; |
853 | } | |
854 | ||
cb00ea35 CG |
855 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
856 | const char *symname) | |
1da177e4 | 857 | { |
cb00ea35 | 858 | struct inode *inode; |
1da177e4 | 859 | struct pathComponent *pc; |
391e8bbd | 860 | const char *compstart; |
28de7948 | 861 | struct extent_position epos = {}; |
1da177e4 | 862 | int eoffset, elen = 0; |
391e8bbd | 863 | uint8_t *ea; |
1da177e4 LT |
864 | int err; |
865 | int block; | |
391e8bbd | 866 | unsigned char *name = NULL; |
1da177e4 | 867 | int namelen; |
48d6d8ff | 868 | struct udf_inode_info *iinfo; |
d664b6af | 869 | struct super_block *sb = dir->i_sb; |
1da177e4 | 870 | |
a6c5a034 | 871 | inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err); |
4b11111a | 872 | if (!inode) |
1da177e4 LT |
873 | goto out; |
874 | ||
4d0fb621 AIB |
875 | iinfo = UDF_I(inode); |
876 | down_write(&iinfo->i_data_sem); | |
b80697c1 JK |
877 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
878 | if (!name) { | |
879 | err = -ENOMEM; | |
880 | goto out_no_entry; | |
881 | } | |
882 | ||
1da177e4 | 883 | inode->i_data.a_ops = &udf_symlink_aops; |
c15d0fc0 | 884 | inode->i_op = &udf_symlink_inode_operations; |
1da177e4 | 885 | |
48d6d8ff | 886 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
5ca4e4be | 887 | struct kernel_lb_addr eloc; |
78e917d5 | 888 | uint32_t bsize; |
1da177e4 | 889 | |
d664b6af | 890 | block = udf_new_block(sb, inode, |
48d6d8ff MS |
891 | iinfo->i_location.partitionReferenceNum, |
892 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
893 | if (!block) |
894 | goto out_no_entry; | |
48d6d8ff | 895 | epos.block = iinfo->i_location; |
ff116fc8 JK |
896 | epos.offset = udf_file_entry_alloc_offset(inode); |
897 | epos.bh = NULL; | |
1da177e4 | 898 | eloc.logicalBlockNum = block; |
4b11111a | 899 | eloc.partitionReferenceNum = |
48d6d8ff | 900 | iinfo->i_location.partitionReferenceNum; |
d664b6af | 901 | bsize = sb->s_blocksize; |
78e917d5 | 902 | iinfo->i_lenExtents = bsize; |
97e961fd | 903 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
3bf25cb4 | 904 | brelse(epos.bh); |
1da177e4 | 905 | |
d664b6af | 906 | block = udf_get_pblock(sb, block, |
48d6d8ff | 907 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 908 | 0); |
d664b6af | 909 | epos.bh = udf_tgetblk(sb, block); |
ff116fc8 | 910 | lock_buffer(epos.bh); |
d664b6af | 911 | memset(epos.bh->b_data, 0x00, bsize); |
ff116fc8 JK |
912 | set_buffer_uptodate(epos.bh); |
913 | unlock_buffer(epos.bh); | |
914 | mark_buffer_dirty_inode(epos.bh, inode); | |
915 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
916 | } else |
917 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 | 918 | |
d664b6af | 919 | eoffset = sb->s_blocksize - udf_ext0_offset(inode); |
1da177e4 LT |
920 | pc = (struct pathComponent *)ea; |
921 | ||
cb00ea35 CG |
922 | if (*symname == '/') { |
923 | do { | |
1da177e4 LT |
924 | symname++; |
925 | } while (*symname == '/'); | |
926 | ||
927 | pc->componentType = 1; | |
928 | pc->lengthComponentIdent = 0; | |
929 | pc->componentFileVersionNum = 0; | |
1da177e4 LT |
930 | elen += sizeof(struct pathComponent); |
931 | } | |
932 | ||
933 | err = -ENAMETOOLONG; | |
934 | ||
cb00ea35 | 935 | while (*symname) { |
1da177e4 LT |
936 | if (elen + sizeof(struct pathComponent) > eoffset) |
937 | goto out_no_entry; | |
938 | ||
939 | pc = (struct pathComponent *)(ea + elen); | |
940 | ||
391e8bbd | 941 | compstart = symname; |
1da177e4 | 942 | |
cb00ea35 | 943 | do { |
1da177e4 LT |
944 | symname++; |
945 | } while (*symname && *symname != '/'); | |
946 | ||
947 | pc->componentType = 5; | |
948 | pc->lengthComponentIdent = 0; | |
949 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
950 | if (compstart[0] == '.') { |
951 | if ((symname - compstart) == 1) | |
1da177e4 | 952 | pc->componentType = 4; |
4b11111a MS |
953 | else if ((symname - compstart) == 2 && |
954 | compstart[1] == '.') | |
1da177e4 LT |
955 | pc->componentType = 3; |
956 | } | |
957 | ||
cb00ea35 | 958 | if (pc->componentType == 5) { |
d664b6af | 959 | namelen = udf_put_filename(sb, compstart, name, |
28de7948 CG |
960 | symname - compstart); |
961 | if (!namelen) | |
1da177e4 LT |
962 | goto out_no_entry; |
963 | ||
4b11111a MS |
964 | if (elen + sizeof(struct pathComponent) + namelen > |
965 | eoffset) | |
1da177e4 LT |
966 | goto out_no_entry; |
967 | else | |
968 | pc->lengthComponentIdent = namelen; | |
969 | ||
970 | memcpy(pc->componentIdent, name, namelen); | |
971 | } | |
972 | ||
973 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
974 | ||
cb00ea35 CG |
975 | if (*symname) { |
976 | do { | |
1da177e4 LT |
977 | symname++; |
978 | } while (*symname == '/'); | |
979 | } | |
980 | } | |
981 | ||
3bf25cb4 | 982 | brelse(epos.bh); |
1da177e4 | 983 | inode->i_size = elen; |
48d6d8ff MS |
984 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
985 | iinfo->i_lenAlloc = inode->i_size; | |
2c948b3f JK |
986 | else |
987 | udf_truncate_tail_extent(inode); | |
1da177e4 | 988 | mark_inode_dirty(inode); |
4ea7772f | 989 | up_write(&iinfo->i_data_sem); |
1da177e4 | 990 | |
d2be51cb | 991 | err = udf_add_nondir(dentry, inode); |
28de7948 | 992 | out: |
b80697c1 | 993 | kfree(name); |
1da177e4 LT |
994 | return err; |
995 | ||
28de7948 | 996 | out_no_entry: |
4d0fb621 | 997 | up_write(&iinfo->i_data_sem); |
9a53c3a7 | 998 | inode_dec_link_count(inode); |
1da177e4 LT |
999 | iput(inode); |
1000 | goto out; | |
1001 | } | |
1002 | ||
cb00ea35 CG |
1003 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1004 | struct dentry *dentry) | |
1da177e4 LT |
1005 | { |
1006 | struct inode *inode = old_dentry->d_inode; | |
1007 | struct udf_fileident_bh fibh; | |
1008 | struct fileIdentDesc cfi, *fi; | |
1009 | int err; | |
1010 | ||
4b11111a MS |
1011 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1012 | if (!fi) { | |
1da177e4 LT |
1013 | return err; |
1014 | } | |
1015 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1016 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
d664b6af | 1017 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
28de7948 | 1018 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
d664b6af | 1019 | cpu_to_le32(lvid_get_unique_id(inode->i_sb)); |
1da177e4 LT |
1020 | } |
1021 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1022 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1023 | mark_inode_dirty(dir); |
28de7948 | 1024 | |
1da177e4 | 1025 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1026 | brelse(fibh.ebh); |
1027 | brelse(fibh.sbh); | |
d8c76e6f | 1028 | inc_nlink(inode); |
1da177e4 LT |
1029 | inode->i_ctime = current_fs_time(inode->i_sb); |
1030 | mark_inode_dirty(inode); | |
7de9c6ee | 1031 | ihold(inode); |
1da177e4 | 1032 | d_instantiate(dentry, inode); |
28de7948 | 1033 | |
1da177e4 LT |
1034 | return 0; |
1035 | } | |
1036 | ||
1037 | /* Anybody can rename anything with this: the permission checks are left to the | |
1038 | * higher-level routines. | |
1039 | */ | |
cb00ea35 CG |
1040 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1041 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1042 | { |
cb00ea35 CG |
1043 | struct inode *old_inode = old_dentry->d_inode; |
1044 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1045 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1046 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1047 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1048 | struct buffer_head *dir_bh = NULL; |
1049 | int retval = -ENOENT; | |
5ca4e4be | 1050 | struct kernel_lb_addr tloc; |
48d6d8ff | 1051 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 | 1052 | |
9fbb76ce | 1053 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
4b11111a | 1054 | if (ofi) { |
1da177e4 | 1055 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1056 | brelse(ofibh.ebh); |
1057 | brelse(ofibh.sbh); | |
1da177e4 LT |
1058 | } |
1059 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
97e961fd | 1060 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
cb00ea35 | 1061 | != old_inode->i_ino) |
1da177e4 LT |
1062 | goto end_rename; |
1063 | ||
9fbb76ce | 1064 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
cb00ea35 CG |
1065 | if (nfi) { |
1066 | if (!new_inode) { | |
1da177e4 | 1067 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1068 | brelse(nfibh.ebh); |
1069 | brelse(nfibh.sbh); | |
1da177e4 LT |
1070 | nfi = NULL; |
1071 | } | |
1072 | } | |
cb00ea35 | 1073 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1074 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1075 | |
cb00ea35 | 1076 | if (new_inode) { |
1da177e4 LT |
1077 | retval = -ENOTEMPTY; |
1078 | if (!empty_dir(new_inode)) | |
1079 | goto end_rename; | |
1080 | } | |
1081 | retval = -EIO; | |
48d6d8ff | 1082 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1083 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1084 | old_iinfo->i_ext.i_data - |
1085 | (old_iinfo->i_efe ? | |
4b11111a MS |
1086 | sizeof(struct extendedFileEntry) : |
1087 | sizeof(struct fileEntry)), | |
1088 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1089 | } else { |
1da177e4 LT |
1090 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1091 | if (!dir_bh) | |
1092 | goto end_rename; | |
4b11111a MS |
1093 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1094 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1095 | } |
1096 | if (!dir_fi) | |
1097 | goto end_rename; | |
1098 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
97e961fd | 1099 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
4b11111a | 1100 | old_dir->i_ino) |
1da177e4 | 1101 | goto end_rename; |
1da177e4 | 1102 | } |
cb00ea35 | 1103 | if (!nfi) { |
4b11111a MS |
1104 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1105 | &retval); | |
1da177e4 LT |
1106 | if (!nfi) |
1107 | goto end_rename; | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Like most other Unix systems, set the ctime for inodes on a | |
1112 | * rename. | |
1113 | */ | |
1114 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1115 | mark_inode_dirty(old_inode); | |
1116 | ||
1117 | /* | |
1118 | * ok, that's it | |
1119 | */ | |
1120 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1121 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
5ca4e4be | 1122 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
1da177e4 LT |
1123 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
1124 | ||
1125 | /* The old fid may have moved - find it again */ | |
9fbb76ce | 1126 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
1da177e4 LT |
1127 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
1128 | ||
cb00ea35 | 1129 | if (new_inode) { |
1da177e4 | 1130 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1131 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1132 | } |
1133 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1134 | mark_inode_dirty(old_dir); | |
1135 | ||
cb00ea35 | 1136 | if (dir_fi) { |
c0b34438 | 1137 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1138 | udf_update_tag((char *)dir_fi, |
1139 | (sizeof(struct fileIdentDesc) + | |
1140 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1141 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1142 | mark_inode_dirty(old_inode); |
4b11111a | 1143 | else |
1da177e4 | 1144 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1145 | |
9a53c3a7 | 1146 | inode_dec_link_count(old_dir); |
4b11111a | 1147 | if (new_inode) |
9a53c3a7 | 1148 | inode_dec_link_count(new_inode); |
4b11111a | 1149 | else { |
d8c76e6f | 1150 | inc_nlink(new_dir); |
1da177e4 LT |
1151 | mark_inode_dirty(new_dir); |
1152 | } | |
1153 | } | |
1154 | ||
cb00ea35 | 1155 | if (ofi) { |
1da177e4 | 1156 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1157 | brelse(ofibh.ebh); |
1158 | brelse(ofibh.sbh); | |
1da177e4 LT |
1159 | } |
1160 | ||
1161 | retval = 0; | |
1162 | ||
28de7948 | 1163 | end_rename: |
3bf25cb4 | 1164 | brelse(dir_bh); |
cb00ea35 | 1165 | if (nfi) { |
1da177e4 | 1166 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1167 | brelse(nfibh.ebh); |
1168 | brelse(nfibh.sbh); | |
1da177e4 | 1169 | } |
28de7948 | 1170 | |
1da177e4 LT |
1171 | return retval; |
1172 | } | |
1173 | ||
221e583a RR |
1174 | static struct dentry *udf_get_parent(struct dentry *child) |
1175 | { | |
97e961fd | 1176 | struct kernel_lb_addr tloc; |
221e583a | 1177 | struct inode *inode = NULL; |
26fe5750 | 1178 | struct qstr dotdot = QSTR_INIT("..", 2); |
221e583a RR |
1179 | struct fileIdentDesc cfi; |
1180 | struct udf_fileident_bh fibh; | |
1181 | ||
221e583a | 1182 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) |
6d3d5e86 | 1183 | return ERR_PTR(-EACCES); |
221e583a RR |
1184 | |
1185 | if (fibh.sbh != fibh.ebh) | |
1186 | brelse(fibh.ebh); | |
1187 | brelse(fibh.sbh); | |
1188 | ||
97e961fd PE |
1189 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
1190 | inode = udf_iget(child->d_inode->i_sb, &tloc); | |
6d3d5e86 JK |
1191 | if (IS_ERR(inode)) |
1192 | return ERR_CAST(inode); | |
221e583a | 1193 | |
44003728 | 1194 | return d_obtain_alias(inode); |
221e583a RR |
1195 | } |
1196 | ||
1197 | ||
1198 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1199 | u16 partref, __u32 generation) | |
1200 | { | |
1201 | struct inode *inode; | |
5ca4e4be | 1202 | struct kernel_lb_addr loc; |
221e583a RR |
1203 | |
1204 | if (block == 0) | |
1205 | return ERR_PTR(-ESTALE); | |
1206 | ||
1207 | loc.logicalBlockNum = block; | |
1208 | loc.partitionReferenceNum = partref; | |
97e961fd | 1209 | inode = udf_iget(sb, &loc); |
221e583a | 1210 | |
6d3d5e86 JK |
1211 | if (IS_ERR(inode)) |
1212 | return ERR_CAST(inode); | |
221e583a RR |
1213 | |
1214 | if (generation && inode->i_generation != generation) { | |
1215 | iput(inode); | |
1216 | return ERR_PTR(-ESTALE); | |
1217 | } | |
44003728 | 1218 | return d_obtain_alias(inode); |
221e583a RR |
1219 | } |
1220 | ||
1221 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1222 | struct fid *fid, int fh_len, int fh_type) | |
1223 | { | |
1224 | if ((fh_len != 3 && fh_len != 5) || | |
1225 | (fh_type != FILEID_UDF_WITH_PARENT && | |
1226 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1227 | return NULL; | |
1228 | ||
1229 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1230 | fid->udf.generation); | |
1231 | } | |
1232 | ||
1233 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1234 | struct fid *fid, int fh_len, int fh_type) | |
1235 | { | |
1236 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) | |
1237 | return NULL; | |
1238 | ||
1239 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1240 | fid->udf.parent_partref, | |
1241 | fid->udf.parent_generation); | |
1242 | } | |
b0b0382b AV |
1243 | static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp, |
1244 | struct inode *parent) | |
221e583a RR |
1245 | { |
1246 | int len = *lenp; | |
5ca4e4be | 1247 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
221e583a RR |
1248 | struct fid *fid = (struct fid *)fh; |
1249 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1250 | ||
b0b0382b | 1251 | if (parent && (len < 5)) { |
5fe0c237 | 1252 | *lenp = 5; |
94e07a75 | 1253 | return FILEID_INVALID; |
5fe0c237 AK |
1254 | } else if (len < 3) { |
1255 | *lenp = 3; | |
94e07a75 | 1256 | return FILEID_INVALID; |
5fe0c237 | 1257 | } |
221e583a RR |
1258 | |
1259 | *lenp = 3; | |
1260 | fid->udf.block = location.logicalBlockNum; | |
1261 | fid->udf.partref = location.partitionReferenceNum; | |
0143fc5e | 1262 | fid->udf.parent_partref = 0; |
221e583a RR |
1263 | fid->udf.generation = inode->i_generation; |
1264 | ||
b0b0382b AV |
1265 | if (parent) { |
1266 | location = UDF_I(parent)->i_location; | |
221e583a RR |
1267 | fid->udf.parent_block = location.logicalBlockNum; |
1268 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1269 | fid->udf.parent_generation = inode->i_generation; | |
221e583a RR |
1270 | *lenp = 5; |
1271 | type = FILEID_UDF_WITH_PARENT; | |
1272 | } | |
1273 | ||
1274 | return type; | |
1275 | } | |
1276 | ||
1277 | const struct export_operations udf_export_ops = { | |
1278 | .encode_fh = udf_encode_fh, | |
1279 | .fh_to_dentry = udf_fh_to_dentry, | |
1280 | .fh_to_parent = udf_fh_to_parent, | |
1281 | .get_parent = udf_get_parent, | |
1282 | }; | |
1283 | ||
c5ef1c42 | 1284 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1285 | .lookup = udf_lookup, |
1286 | .create = udf_create, | |
1287 | .link = udf_link, | |
1288 | .unlink = udf_unlink, | |
1289 | .symlink = udf_symlink, | |
1290 | .mkdir = udf_mkdir, | |
1291 | .rmdir = udf_rmdir, | |
1292 | .mknod = udf_mknod, | |
1293 | .rename = udf_rename, | |
656d09df | 1294 | .tmpfile = udf_tmpfile, |
1da177e4 | 1295 | }; |
c15d0fc0 DM |
1296 | const struct inode_operations udf_symlink_inode_operations = { |
1297 | .readlink = generic_readlink, | |
1298 | .follow_link = page_follow_link_light, | |
1299 | .put_link = page_put_link, | |
c15d0fc0 | 1300 | }; |