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> | |
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] == '.'; | |
3ee3039c | 162 | struct super_block *sb = dir->i_sb; |
1da177e4 | 163 | |
af793295 JK |
164 | size = udf_ext0_offset(dir) + dir->i_size; |
165 | f_pos = udf_ext0_offset(dir); | |
1da177e4 | 166 | |
b80697c1 | 167 | fibh->sbh = fibh->ebh = NULL; |
3ee3039c | 168 | fibh->soffset = fibh->eoffset = f_pos & (sb->s_blocksize - 1); |
b80697c1 | 169 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
3ee3039c | 170 | if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos, |
b80697c1 JK |
171 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) |
172 | goto out_err; | |
3ee3039c JK |
173 | block = udf_get_lb_pblock(sb, &eloc, offset); |
174 | if ((++offset << sb->s_blocksize_bits) < elen) { | |
48d6d8ff | 175 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 176 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 177 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 178 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 179 | } else |
1da177e4 LT |
180 | offset = 0; |
181 | ||
3ee3039c | 182 | fibh->sbh = fibh->ebh = udf_tread(sb, block); |
b80697c1 JK |
183 | if (!fibh->sbh) |
184 | goto out_err; | |
1da177e4 LT |
185 | } |
186 | ||
b80697c1 JK |
187 | fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
188 | if (!fname) | |
189 | goto out_err; | |
190 | ||
af793295 | 191 | while (f_pos < size) { |
cb00ea35 CG |
192 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
193 | &elen, &offset); | |
b80697c1 JK |
194 | if (!fi) |
195 | goto out_err; | |
1da177e4 LT |
196 | |
197 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
198 | lfi = cfi->lengthFileIdent; | |
199 | ||
cb00ea35 | 200 | if (fibh->sbh == fibh->ebh) { |
1da177e4 | 201 | nameptr = fi->fileIdent + liu; |
cb00ea35 | 202 | } else { |
1da177e4 LT |
203 | int poffset; /* Unpaded ending offset */ |
204 | ||
4b11111a MS |
205 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
206 | liu + lfi; | |
1da177e4 | 207 | |
4b11111a MS |
208 | if (poffset >= lfi) |
209 | nameptr = (uint8_t *)(fibh->ebh->b_data + | |
210 | poffset - lfi); | |
211 | else { | |
1da177e4 | 212 | nameptr = fname; |
4b11111a MS |
213 | memcpy(nameptr, fi->fileIdent + liu, |
214 | lfi - poffset); | |
215 | memcpy(nameptr + lfi - poffset, | |
216 | fibh->ebh->b_data, poffset); | |
1da177e4 LT |
217 | } |
218 | } | |
219 | ||
cb00ea35 | 220 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
3ee3039c | 221 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) |
1da177e4 LT |
222 | continue; |
223 | } | |
cb00ea35 CG |
224 | |
225 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { | |
3ee3039c | 226 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) |
1da177e4 LT |
227 | continue; |
228 | } | |
229 | ||
221e583a | 230 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
a4264b3f JJ |
231 | isdotdot) |
232 | goto out_ok; | |
221e583a | 233 | |
1da177e4 LT |
234 | if (!lfi) |
235 | continue; | |
236 | ||
3ee3039c | 237 | flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN); |
9fbb76ce | 238 | if (flen && udf_match(flen, fname, child->len, child->name)) |
b80697c1 | 239 | goto out_ok; |
1da177e4 | 240 | } |
28de7948 | 241 | |
b80697c1 JK |
242 | out_err: |
243 | fi = NULL; | |
1da177e4 | 244 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
245 | brelse(fibh->ebh); |
246 | brelse(fibh->sbh); | |
b80697c1 | 247 | out_ok: |
3bf25cb4 | 248 | brelse(epos.bh); |
b80697c1 | 249 | kfree(fname); |
28de7948 | 250 | |
b80697c1 | 251 | return fi; |
1da177e4 LT |
252 | } |
253 | ||
cb00ea35 | 254 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 255 | unsigned int flags) |
1da177e4 LT |
256 | { |
257 | struct inode *inode = NULL; | |
db9a369e | 258 | struct fileIdentDesc cfi; |
1da177e4 LT |
259 | struct udf_fileident_bh fibh; |
260 | ||
cb00ea35 | 261 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
1da177e4 LT |
262 | return ERR_PTR(-ENAMETOOLONG); |
263 | ||
1da177e4 LT |
264 | #ifdef UDF_RECOVERY |
265 | /* temporary shorthand for specifying files by inode number */ | |
cb00ea35 | 266 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
5ca4e4be | 267 | struct kernel_lb_addr lb = { |
28de7948 | 268 | .logicalBlockNum = 0, |
4b11111a MS |
269 | .partitionReferenceNum = |
270 | simple_strtoul(dentry->d_name.name + 3, | |
271 | NULL, 0), | |
28de7948 | 272 | }; |
1da177e4 | 273 | inode = udf_iget(dir->i_sb, lb); |
6d3d5e86 JK |
274 | if (IS_ERR(inode)) |
275 | return inode; | |
4b11111a | 276 | } else |
28de7948 | 277 | #endif /* UDF_RECOVERY */ |
1da177e4 | 278 | |
9fbb76ce | 279 | if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { |
97e961fd PE |
280 | struct kernel_lb_addr loc; |
281 | ||
1da177e4 | 282 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
283 | brelse(fibh.ebh); |
284 | brelse(fibh.sbh); | |
1da177e4 | 285 | |
97e961fd PE |
286 | loc = lelb_to_cpu(cfi.icb.extLocation); |
287 | inode = udf_iget(dir->i_sb, &loc); | |
6d3d5e86 JK |
288 | if (IS_ERR(inode)) |
289 | return ERR_CAST(inode); | |
1da177e4 | 290 | } |
28de7948 | 291 | |
221e583a | 292 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
293 | } |
294 | ||
cb00ea35 CG |
295 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
296 | struct dentry *dentry, | |
297 | struct udf_fileident_bh *fibh, | |
298 | struct fileIdentDesc *cfi, int *err) | |
1da177e4 | 299 | { |
6c79e987 | 300 | struct super_block *sb = dir->i_sb; |
cb00ea35 | 301 | struct fileIdentDesc *fi = NULL; |
391e8bbd | 302 | unsigned char *name = NULL; |
1da177e4 LT |
303 | int namelen; |
304 | loff_t f_pos; | |
af793295 | 305 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 LT |
306 | int nfidlen; |
307 | uint8_t lfi; | |
308 | uint16_t liu; | |
309 | int block; | |
5ca4e4be | 310 | struct kernel_lb_addr eloc; |
9afadc4b | 311 | uint32_t elen = 0; |
60448b1d | 312 | sector_t offset; |
28de7948 | 313 | struct extent_position epos = {}; |
48d6d8ff | 314 | struct udf_inode_info *dinfo; |
1da177e4 | 315 | |
b80697c1 JK |
316 | fibh->sbh = fibh->ebh = NULL; |
317 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); | |
318 | if (!name) { | |
319 | *err = -ENOMEM; | |
320 | goto out_err; | |
321 | } | |
322 | ||
cb00ea35 CG |
323 | if (dentry) { |
324 | if (!dentry->d_name.len) { | |
1da177e4 | 325 | *err = -EINVAL; |
b80697c1 | 326 | goto out_err; |
1da177e4 | 327 | } |
4b11111a MS |
328 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
329 | dentry->d_name.len); | |
330 | if (!namelen) { | |
1da177e4 | 331 | *err = -ENAMETOOLONG; |
b80697c1 | 332 | goto out_err; |
1da177e4 | 333 | } |
28de7948 | 334 | } else { |
1da177e4 | 335 | namelen = 0; |
28de7948 | 336 | } |
1da177e4 LT |
337 | |
338 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; | |
339 | ||
af793295 | 340 | f_pos = udf_ext0_offset(dir); |
1da177e4 | 341 | |
af793295 | 342 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
48d6d8ff | 343 | dinfo = UDF_I(dir); |
b80697c1 JK |
344 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
345 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, | |
346 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { | |
347 | block = udf_get_lb_pblock(dir->i_sb, | |
97e961fd | 348 | &dinfo->i_location, 0); |
b80697c1 JK |
349 | fibh->soffset = fibh->eoffset = sb->s_blocksize; |
350 | goto add; | |
351 | } | |
97e961fd | 352 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 353 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 354 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 355 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 356 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 357 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 358 | } else |
1da177e4 LT |
359 | offset = 0; |
360 | ||
4b11111a MS |
361 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
362 | if (!fibh->sbh) { | |
1da177e4 | 363 | *err = -EIO; |
b80697c1 | 364 | goto out_err; |
1da177e4 LT |
365 | } |
366 | ||
48d6d8ff | 367 | block = dinfo->i_location.logicalBlockNum; |
1da177e4 LT |
368 | } |
369 | ||
af793295 | 370 | while (f_pos < size) { |
cb00ea35 CG |
371 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
372 | &elen, &offset); | |
1da177e4 | 373 | |
cb00ea35 | 374 | if (!fi) { |
1da177e4 | 375 | *err = -EIO; |
b80697c1 | 376 | goto out_err; |
1da177e4 LT |
377 | } |
378 | ||
379 | liu = le16_to_cpu(cfi->lengthOfImpUse); | |
380 | lfi = cfi->lengthFileIdent; | |
381 | ||
cb00ea35 | 382 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
4b11111a MS |
383 | if (((sizeof(struct fileIdentDesc) + |
384 | liu + lfi + 3) & ~3) == nfidlen) { | |
1da177e4 LT |
385 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
386 | cfi->fileVersionNum = cpu_to_le16(1); | |
387 | cfi->fileCharacteristics = 0; | |
388 | cfi->lengthFileIdent = namelen; | |
389 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
4b11111a MS |
390 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
391 | name)) | |
b80697c1 | 392 | goto out_ok; |
4b11111a | 393 | else { |
1da177e4 | 394 | *err = -EIO; |
b80697c1 | 395 | goto out_err; |
1da177e4 LT |
396 | } |
397 | } | |
398 | } | |
1da177e4 LT |
399 | } |
400 | ||
28de7948 | 401 | add: |
1da177e4 LT |
402 | f_pos += nfidlen; |
403 | ||
48d6d8ff | 404 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
cb00ea35 | 405 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
3bf25cb4 | 406 | brelse(epos.bh); |
ff116fc8 | 407 | epos.bh = NULL; |
1da177e4 LT |
408 | fibh->soffset -= udf_ext0_offset(dir); |
409 | fibh->eoffset -= udf_ext0_offset(dir); | |
af793295 | 410 | f_pos -= udf_ext0_offset(dir); |
1da177e4 | 411 | if (fibh->sbh != fibh->ebh) |
3bf25cb4 JK |
412 | brelse(fibh->ebh); |
413 | brelse(fibh->sbh); | |
4b11111a MS |
414 | fibh->sbh = fibh->ebh = |
415 | udf_expand_dir_adinicb(dir, &block, err); | |
416 | if (!fibh->sbh) | |
b80697c1 | 417 | goto out_err; |
48d6d8ff | 418 | epos.block = dinfo->i_location; |
ff116fc8 | 419 | epos.offset = udf_file_entry_alloc_offset(dir); |
05343c4f JK |
420 | /* Load extent udf_expand_dir_adinicb() has created */ |
421 | udf_current_aext(dir, &epos, &eloc, &elen, 1); | |
1da177e4 LT |
422 | } |
423 | ||
2c948b3f | 424 | /* Entry fits into current block? */ |
cb00ea35 | 425 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
1da177e4 LT |
426 | fibh->soffset = fibh->eoffset; |
427 | fibh->eoffset += nfidlen; | |
cb00ea35 | 428 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 429 | brelse(fibh->sbh); |
1da177e4 LT |
430 | fibh->sbh = fibh->ebh; |
431 | } | |
432 | ||
48d6d8ff MS |
433 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
434 | block = dinfo->i_location.logicalBlockNum; | |
4b11111a | 435 | fi = (struct fileIdentDesc *) |
48d6d8ff | 436 | (dinfo->i_ext.i_data + |
c0b34438 | 437 | fibh->soffset - |
4b11111a | 438 | udf_ext0_offset(dir) + |
48d6d8ff | 439 | dinfo->i_lenEAttr); |
cb00ea35 | 440 | } else { |
4b11111a MS |
441 | block = eloc.logicalBlockNum + |
442 | ((elen - 1) >> | |
443 | dir->i_sb->s_blocksize_bits); | |
444 | fi = (struct fileIdentDesc *) | |
445 | (fibh->sbh->b_data + fibh->soffset); | |
1da177e4 | 446 | } |
cb00ea35 | 447 | } else { |
2c948b3f JK |
448 | /* Round up last extent in the file */ |
449 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); | |
450 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
451 | epos.offset -= sizeof(struct short_ad); | |
452 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
453 | epos.offset -= sizeof(struct long_ad); | |
454 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
455 | dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize | |
456 | - 1) & ~(sb->s_blocksize - 1); | |
457 | ||
1da177e4 LT |
458 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
459 | fibh->eoffset += nfidlen - sb->s_blocksize; | |
cb00ea35 | 460 | if (fibh->sbh != fibh->ebh) { |
3bf25cb4 | 461 | brelse(fibh->sbh); |
1da177e4 LT |
462 | fibh->sbh = fibh->ebh; |
463 | } | |
464 | ||
465 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
cb00ea35 | 466 | dir->i_sb->s_blocksize_bits); |
4b11111a | 467 | fibh->ebh = udf_bread(dir, |
af793295 | 468 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
b80697c1 JK |
469 | if (!fibh->ebh) |
470 | goto out_err; | |
4651c590 JK |
471 | /* Extents could have been merged, invalidate our position */ |
472 | brelse(epos.bh); | |
473 | epos.bh = NULL; | |
474 | epos.block = dinfo->i_location; | |
475 | epos.offset = udf_file_entry_alloc_offset(dir); | |
1da177e4 | 476 | |
28de7948 | 477 | if (!fibh->soffset) { |
4651c590 JK |
478 | /* Find the freshly allocated block */ |
479 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
480 | (EXT_RECORDED_ALLOCATED >> 30)) | |
481 | ; | |
482 | block = eloc.logicalBlockNum + ((elen - 1) >> | |
28de7948 | 483 | dir->i_sb->s_blocksize_bits); |
3bf25cb4 | 484 | brelse(fibh->sbh); |
1da177e4 LT |
485 | fibh->sbh = fibh->ebh; |
486 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); | |
cb00ea35 | 487 | } else { |
1da177e4 | 488 | fi = (struct fileIdentDesc *) |
4b11111a MS |
489 | (fibh->sbh->b_data + sb->s_blocksize + |
490 | fibh->soffset); | |
1da177e4 LT |
491 | } |
492 | } | |
493 | ||
494 | memset(cfi, 0, sizeof(struct fileIdentDesc)); | |
6c79e987 | 495 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
4b11111a | 496 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
5ca4e4be | 497 | sizeof(struct tag)); |
1da177e4 | 498 | else |
4b11111a | 499 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
5ca4e4be | 500 | sizeof(struct tag)); |
1da177e4 LT |
501 | cfi->fileVersionNum = cpu_to_le16(1); |
502 | cfi->lengthFileIdent = namelen; | |
503 | cfi->lengthOfImpUse = cpu_to_le16(0); | |
cb00ea35 | 504 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
1da177e4 | 505 | dir->i_size += nfidlen; |
48d6d8ff MS |
506 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
507 | dinfo->i_lenAlloc += nfidlen; | |
2c948b3f JK |
508 | else { |
509 | /* Find the last extent and truncate it to proper size */ | |
510 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == | |
511 | (EXT_RECORDED_ALLOCATED >> 30)) | |
512 | ; | |
513 | elen -= dinfo->i_lenExtents - dir->i_size; | |
514 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
515 | epos.offset -= sizeof(struct short_ad); | |
516 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
517 | epos.offset -= sizeof(struct long_ad); | |
518 | udf_write_aext(dir, &epos, &eloc, elen, 1); | |
519 | dinfo->i_lenExtents = dir->i_size; | |
520 | } | |
521 | ||
1da177e4 | 522 | mark_inode_dirty(dir); |
b80697c1 | 523 | goto out_ok; |
cb00ea35 | 524 | } else { |
1da177e4 | 525 | *err = -EIO; |
b80697c1 | 526 | goto out_err; |
1da177e4 | 527 | } |
b80697c1 JK |
528 | |
529 | out_err: | |
530 | fi = NULL; | |
531 | if (fibh->sbh != fibh->ebh) | |
532 | brelse(fibh->ebh); | |
533 | brelse(fibh->sbh); | |
534 | out_ok: | |
535 | brelse(epos.bh); | |
536 | kfree(name); | |
537 | return fi; | |
1da177e4 LT |
538 | } |
539 | ||
540 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, | |
cb00ea35 CG |
541 | struct udf_fileident_bh *fibh, |
542 | struct fileIdentDesc *cfi) | |
1da177e4 LT |
543 | { |
544 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; | |
28de7948 | 545 | |
1da177e4 | 546 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
5ca4e4be | 547 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
28de7948 | 548 | |
1da177e4 LT |
549 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
550 | } | |
551 | ||
d2be51cb | 552 | static int udf_add_nondir(struct dentry *dentry, struct inode *inode) |
1da177e4 | 553 | { |
d2be51cb AV |
554 | struct udf_inode_info *iinfo = UDF_I(inode); |
555 | struct inode *dir = dentry->d_parent->d_inode; | |
1da177e4 | 556 | struct udf_fileident_bh fibh; |
1da177e4 LT |
557 | struct fileIdentDesc cfi, *fi; |
558 | int err; | |
1da177e4 | 559 | |
4b11111a | 560 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
d2be51cb | 561 | if (unlikely(!fi)) { |
6d6b77f1 | 562 | inode_dec_link_count(inode); |
b2315096 | 563 | unlock_new_inode(inode); |
1da177e4 | 564 | iput(inode); |
1da177e4 LT |
565 | return err; |
566 | } | |
567 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 568 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 569 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 570 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 | 571 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
c0b34438 | 572 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 573 | mark_inode_dirty(dir); |
1da177e4 | 574 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
575 | brelse(fibh.ebh); |
576 | brelse(fibh.sbh); | |
b2315096 | 577 | unlock_new_inode(inode); |
1da177e4 | 578 | d_instantiate(dentry, inode); |
28de7948 | 579 | |
1da177e4 LT |
580 | return 0; |
581 | } | |
582 | ||
d2be51cb AV |
583 | static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
584 | bool excl) | |
585 | { | |
0b93a92b | 586 | struct inode *inode = udf_new_inode(dir, mode); |
d2be51cb | 587 | |
0b93a92b AV |
588 | if (IS_ERR(inode)) |
589 | return PTR_ERR(inode); | |
d2be51cb AV |
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 | { | |
0b93a92b | 604 | struct inode *inode = udf_new_inode(dir, mode); |
656d09df | 605 | |
0b93a92b AV |
606 | if (IS_ERR(inode)) |
607 | return PTR_ERR(inode); | |
656d09df | 608 | |
0b93a92b | 609 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
656d09df AV |
610 | inode->i_data.a_ops = &udf_adinicb_aops; |
611 | else | |
612 | inode->i_data.a_ops = &udf_aops; | |
613 | inode->i_op = &udf_file_inode_operations; | |
614 | inode->i_fop = &udf_file_operations; | |
615 | mark_inode_dirty(inode); | |
656d09df | 616 | d_tmpfile(dentry, inode); |
b2315096 | 617 | unlock_new_inode(inode); |
656d09df AV |
618 | return 0; |
619 | } | |
620 | ||
1a67aafb | 621 | static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
cb00ea35 | 622 | dev_t rdev) |
1da177e4 | 623 | { |
cb00ea35 | 624 | struct inode *inode; |
1da177e4 LT |
625 | |
626 | if (!old_valid_dev(rdev)) | |
627 | return -EINVAL; | |
628 | ||
0b93a92b AV |
629 | inode = udf_new_inode(dir, mode); |
630 | if (IS_ERR(inode)) | |
631 | return PTR_ERR(inode); | |
28de7948 | 632 | |
d2be51cb AV |
633 | init_special_inode(inode, mode, rdev); |
634 | return udf_add_nondir(dentry, inode); | |
1da177e4 LT |
635 | } |
636 | ||
18bb1db3 | 637 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
1da177e4 | 638 | { |
cb00ea35 | 639 | struct inode *inode; |
1da177e4 LT |
640 | struct udf_fileident_bh fibh; |
641 | struct fileIdentDesc cfi, *fi; | |
642 | int err; | |
48d6d8ff MS |
643 | struct udf_inode_info *dinfo = UDF_I(dir); |
644 | struct udf_inode_info *iinfo; | |
1da177e4 | 645 | |
0b93a92b AV |
646 | inode = udf_new_inode(dir, S_IFDIR | mode); |
647 | if (IS_ERR(inode)) | |
648 | return PTR_ERR(inode); | |
1da177e4 | 649 | |
48d6d8ff | 650 | iinfo = UDF_I(inode); |
1da177e4 LT |
651 | inode->i_op = &udf_dir_inode_operations; |
652 | inode->i_fop = &udf_dir_operations; | |
4b11111a MS |
653 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
654 | if (!fi) { | |
6d6b77f1 | 655 | inode_dec_link_count(inode); |
b2315096 | 656 | unlock_new_inode(inode); |
1da177e4 LT |
657 | iput(inode); |
658 | goto out; | |
659 | } | |
bfe86848 | 660 | set_nlink(inode, 2); |
1da177e4 | 661 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
48d6d8ff | 662 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
28de7948 | 663 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 664 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
4b11111a MS |
665 | cfi.fileCharacteristics = |
666 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; | |
1da177e4 | 667 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
3bf25cb4 | 668 | brelse(fibh.sbh); |
1da177e4 LT |
669 | mark_inode_dirty(inode); |
670 | ||
4b11111a MS |
671 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
672 | if (!fi) { | |
6d6b77f1 | 673 | clear_nlink(inode); |
1da177e4 | 674 | mark_inode_dirty(inode); |
b2315096 | 675 | unlock_new_inode(inode); |
1da177e4 LT |
676 | iput(inode); |
677 | goto out; | |
678 | } | |
679 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
48d6d8ff | 680 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
28de7948 | 681 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
48d6d8ff | 682 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
1da177e4 LT |
683 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
684 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
d8c76e6f | 685 | inc_nlink(dir); |
1da177e4 | 686 | mark_inode_dirty(dir); |
b2315096 | 687 | unlock_new_inode(inode); |
1da177e4 LT |
688 | d_instantiate(dentry, inode); |
689 | if (fibh.sbh != fibh.ebh) | |
3bf25cb4 JK |
690 | brelse(fibh.ebh); |
691 | brelse(fibh.sbh); | |
1da177e4 | 692 | err = 0; |
28de7948 CG |
693 | |
694 | out: | |
1da177e4 LT |
695 | return err; |
696 | } | |
697 | ||
698 | static int empty_dir(struct inode *dir) | |
699 | { | |
700 | struct fileIdentDesc *fi, cfi; | |
701 | struct udf_fileident_bh fibh; | |
702 | loff_t f_pos; | |
af793295 | 703 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
1da177e4 | 704 | int block; |
5ca4e4be | 705 | struct kernel_lb_addr eloc; |
ff116fc8 | 706 | uint32_t elen; |
60448b1d | 707 | sector_t offset; |
28de7948 | 708 | struct extent_position epos = {}; |
48d6d8ff | 709 | struct udf_inode_info *dinfo = UDF_I(dir); |
1da177e4 | 710 | |
af793295 JK |
711 | f_pos = udf_ext0_offset(dir); |
712 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); | |
1da177e4 | 713 | |
48d6d8ff | 714 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 715 | fibh.sbh = fibh.ebh = NULL; |
af793295 | 716 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
4b11111a MS |
717 | &epos, &eloc, &elen, &offset) == |
718 | (EXT_RECORDED_ALLOCATED >> 30)) { | |
97e961fd | 719 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
cb00ea35 | 720 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
48d6d8ff | 721 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 722 | epos.offset -= sizeof(struct short_ad); |
48d6d8ff | 723 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 724 | epos.offset -= sizeof(struct long_ad); |
4b11111a | 725 | } else |
1da177e4 LT |
726 | offset = 0; |
727 | ||
4b11111a MS |
728 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
729 | if (!fibh.sbh) { | |
3bf25cb4 | 730 | brelse(epos.bh); |
1da177e4 LT |
731 | return 0; |
732 | } | |
cb00ea35 | 733 | } else { |
3bf25cb4 | 734 | brelse(epos.bh); |
1da177e4 LT |
735 | return 0; |
736 | } | |
737 | ||
af793295 | 738 | while (f_pos < size) { |
cb00ea35 CG |
739 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
740 | &elen, &offset); | |
cb00ea35 | 741 | if (!fi) { |
1da177e4 | 742 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
743 | brelse(fibh.ebh); |
744 | brelse(fibh.sbh); | |
745 | brelse(epos.bh); | |
1da177e4 LT |
746 | return 0; |
747 | } | |
748 | ||
28de7948 CG |
749 | if (cfi.lengthFileIdent && |
750 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { | |
1da177e4 | 751 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
752 | brelse(fibh.ebh); |
753 | brelse(fibh.sbh); | |
754 | brelse(epos.bh); | |
1da177e4 LT |
755 | return 0; |
756 | } | |
757 | } | |
28de7948 | 758 | |
1da177e4 | 759 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
760 | brelse(fibh.ebh); |
761 | brelse(fibh.sbh); | |
762 | brelse(epos.bh); | |
28de7948 | 763 | |
1da177e4 LT |
764 | return 1; |
765 | } | |
766 | ||
cb00ea35 | 767 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
768 | { |
769 | int retval; | |
cb00ea35 | 770 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
771 | struct udf_fileident_bh fibh; |
772 | struct fileIdentDesc *fi, cfi; | |
5ca4e4be | 773 | struct kernel_lb_addr tloc; |
1da177e4 LT |
774 | |
775 | retval = -ENOENT; | |
9fbb76ce | 776 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
777 | if (!fi) |
778 | goto out; | |
779 | ||
780 | retval = -EIO; | |
781 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 782 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
783 | goto end_rmdir; |
784 | retval = -ENOTEMPTY; | |
785 | if (!empty_dir(inode)) | |
786 | goto end_rmdir; | |
787 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
788 | if (retval) | |
789 | goto end_rmdir; | |
790 | if (inode->i_nlink != 2) | |
a40ecd7b JP |
791 | udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n", |
792 | inode->i_nlink); | |
ce71ec36 | 793 | clear_nlink(inode); |
1da177e4 | 794 | inode->i_size = 0; |
c007c06e | 795 | inode_dec_link_count(dir); |
4b11111a MS |
796 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
797 | current_fs_time(dir->i_sb); | |
1da177e4 LT |
798 | mark_inode_dirty(dir); |
799 | ||
28de7948 | 800 | end_rmdir: |
1da177e4 | 801 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
802 | brelse(fibh.ebh); |
803 | brelse(fibh.sbh); | |
28de7948 CG |
804 | |
805 | out: | |
1da177e4 LT |
806 | return retval; |
807 | } | |
808 | ||
cb00ea35 | 809 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
810 | { |
811 | int retval; | |
cb00ea35 | 812 | struct inode *inode = dentry->d_inode; |
1da177e4 LT |
813 | struct udf_fileident_bh fibh; |
814 | struct fileIdentDesc *fi; | |
815 | struct fileIdentDesc cfi; | |
5ca4e4be | 816 | struct kernel_lb_addr tloc; |
1da177e4 LT |
817 | |
818 | retval = -ENOENT; | |
9fbb76ce | 819 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
1da177e4 LT |
820 | if (!fi) |
821 | goto out; | |
822 | ||
823 | retval = -EIO; | |
824 | tloc = lelb_to_cpu(cfi.icb.extLocation); | |
97e961fd | 825 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
1da177e4 LT |
826 | goto end_unlink; |
827 | ||
cb00ea35 | 828 | if (!inode->i_nlink) { |
1da177e4 | 829 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
cb00ea35 | 830 | inode->i_ino, inode->i_nlink); |
bfe86848 | 831 | set_nlink(inode, 1); |
1da177e4 LT |
832 | } |
833 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); | |
834 | if (retval) | |
835 | goto end_unlink; | |
836 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); | |
837 | mark_inode_dirty(dir); | |
9a53c3a7 | 838 | inode_dec_link_count(inode); |
1da177e4 LT |
839 | inode->i_ctime = dir->i_ctime; |
840 | retval = 0; | |
841 | ||
28de7948 | 842 | end_unlink: |
1da177e4 | 843 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
844 | brelse(fibh.ebh); |
845 | brelse(fibh.sbh); | |
28de7948 CG |
846 | |
847 | out: | |
1da177e4 LT |
848 | return retval; |
849 | } | |
850 | ||
cb00ea35 CG |
851 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
852 | const char *symname) | |
1da177e4 | 853 | { |
0b93a92b | 854 | struct inode *inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO); |
1da177e4 | 855 | struct pathComponent *pc; |
391e8bbd | 856 | const char *compstart; |
28de7948 | 857 | struct extent_position epos = {}; |
1da177e4 | 858 | int eoffset, elen = 0; |
391e8bbd | 859 | uint8_t *ea; |
1da177e4 LT |
860 | int err; |
861 | int block; | |
391e8bbd | 862 | unsigned char *name = NULL; |
1da177e4 | 863 | int namelen; |
48d6d8ff | 864 | struct udf_inode_info *iinfo; |
d664b6af | 865 | struct super_block *sb = dir->i_sb; |
1da177e4 | 866 | |
0b93a92b AV |
867 | if (IS_ERR(inode)) |
868 | return PTR_ERR(inode); | |
1da177e4 | 869 | |
4d0fb621 AIB |
870 | iinfo = UDF_I(inode); |
871 | down_write(&iinfo->i_data_sem); | |
b80697c1 JK |
872 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
873 | if (!name) { | |
874 | err = -ENOMEM; | |
875 | goto out_no_entry; | |
876 | } | |
877 | ||
1da177e4 | 878 | inode->i_data.a_ops = &udf_symlink_aops; |
c15d0fc0 | 879 | inode->i_op = &udf_symlink_inode_operations; |
1da177e4 | 880 | |
48d6d8ff | 881 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
5ca4e4be | 882 | struct kernel_lb_addr eloc; |
78e917d5 | 883 | uint32_t bsize; |
1da177e4 | 884 | |
d664b6af | 885 | block = udf_new_block(sb, inode, |
48d6d8ff MS |
886 | iinfo->i_location.partitionReferenceNum, |
887 | iinfo->i_location.logicalBlockNum, &err); | |
1da177e4 LT |
888 | if (!block) |
889 | goto out_no_entry; | |
48d6d8ff | 890 | epos.block = iinfo->i_location; |
ff116fc8 JK |
891 | epos.offset = udf_file_entry_alloc_offset(inode); |
892 | epos.bh = NULL; | |
1da177e4 | 893 | eloc.logicalBlockNum = block; |
4b11111a | 894 | eloc.partitionReferenceNum = |
48d6d8ff | 895 | iinfo->i_location.partitionReferenceNum; |
d664b6af | 896 | bsize = sb->s_blocksize; |
78e917d5 | 897 | iinfo->i_lenExtents = bsize; |
97e961fd | 898 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
3bf25cb4 | 899 | brelse(epos.bh); |
1da177e4 | 900 | |
d664b6af | 901 | block = udf_get_pblock(sb, block, |
48d6d8ff | 902 | iinfo->i_location.partitionReferenceNum, |
4b11111a | 903 | 0); |
d664b6af | 904 | epos.bh = udf_tgetblk(sb, block); |
ff116fc8 | 905 | lock_buffer(epos.bh); |
d664b6af | 906 | memset(epos.bh->b_data, 0x00, bsize); |
ff116fc8 JK |
907 | set_buffer_uptodate(epos.bh); |
908 | unlock_buffer(epos.bh); | |
909 | mark_buffer_dirty_inode(epos.bh, inode); | |
910 | ea = epos.bh->b_data + udf_ext0_offset(inode); | |
48d6d8ff MS |
911 | } else |
912 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; | |
1da177e4 | 913 | |
d664b6af | 914 | eoffset = sb->s_blocksize - udf_ext0_offset(inode); |
1da177e4 LT |
915 | pc = (struct pathComponent *)ea; |
916 | ||
cb00ea35 CG |
917 | if (*symname == '/') { |
918 | do { | |
1da177e4 LT |
919 | symname++; |
920 | } while (*symname == '/'); | |
921 | ||
922 | pc->componentType = 1; | |
923 | pc->lengthComponentIdent = 0; | |
924 | pc->componentFileVersionNum = 0; | |
1da177e4 LT |
925 | elen += sizeof(struct pathComponent); |
926 | } | |
927 | ||
928 | err = -ENAMETOOLONG; | |
929 | ||
cb00ea35 | 930 | while (*symname) { |
1da177e4 LT |
931 | if (elen + sizeof(struct pathComponent) > eoffset) |
932 | goto out_no_entry; | |
933 | ||
934 | pc = (struct pathComponent *)(ea + elen); | |
935 | ||
391e8bbd | 936 | compstart = symname; |
1da177e4 | 937 | |
cb00ea35 | 938 | do { |
1da177e4 LT |
939 | symname++; |
940 | } while (*symname && *symname != '/'); | |
941 | ||
942 | pc->componentType = 5; | |
943 | pc->lengthComponentIdent = 0; | |
944 | pc->componentFileVersionNum = 0; | |
cb00ea35 CG |
945 | if (compstart[0] == '.') { |
946 | if ((symname - compstart) == 1) | |
1da177e4 | 947 | pc->componentType = 4; |
4b11111a MS |
948 | else if ((symname - compstart) == 2 && |
949 | compstart[1] == '.') | |
1da177e4 LT |
950 | pc->componentType = 3; |
951 | } | |
952 | ||
cb00ea35 | 953 | if (pc->componentType == 5) { |
d664b6af | 954 | namelen = udf_put_filename(sb, compstart, name, |
28de7948 CG |
955 | symname - compstart); |
956 | if (!namelen) | |
1da177e4 LT |
957 | goto out_no_entry; |
958 | ||
4b11111a MS |
959 | if (elen + sizeof(struct pathComponent) + namelen > |
960 | eoffset) | |
1da177e4 LT |
961 | goto out_no_entry; |
962 | else | |
963 | pc->lengthComponentIdent = namelen; | |
964 | ||
965 | memcpy(pc->componentIdent, name, namelen); | |
966 | } | |
967 | ||
968 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; | |
969 | ||
cb00ea35 CG |
970 | if (*symname) { |
971 | do { | |
1da177e4 LT |
972 | symname++; |
973 | } while (*symname == '/'); | |
974 | } | |
975 | } | |
976 | ||
3bf25cb4 | 977 | brelse(epos.bh); |
1da177e4 | 978 | inode->i_size = elen; |
48d6d8ff MS |
979 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
980 | iinfo->i_lenAlloc = inode->i_size; | |
2c948b3f JK |
981 | else |
982 | udf_truncate_tail_extent(inode); | |
1da177e4 | 983 | mark_inode_dirty(inode); |
4ea7772f | 984 | up_write(&iinfo->i_data_sem); |
1da177e4 | 985 | |
d2be51cb | 986 | err = udf_add_nondir(dentry, inode); |
28de7948 | 987 | out: |
b80697c1 | 988 | kfree(name); |
1da177e4 LT |
989 | return err; |
990 | ||
28de7948 | 991 | out_no_entry: |
4d0fb621 | 992 | up_write(&iinfo->i_data_sem); |
9a53c3a7 | 993 | inode_dec_link_count(inode); |
b2315096 | 994 | unlock_new_inode(inode); |
1da177e4 LT |
995 | iput(inode); |
996 | goto out; | |
997 | } | |
998 | ||
cb00ea35 CG |
999 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
1000 | struct dentry *dentry) | |
1da177e4 LT |
1001 | { |
1002 | struct inode *inode = old_dentry->d_inode; | |
1003 | struct udf_fileident_bh fibh; | |
1004 | struct fileIdentDesc cfi, *fi; | |
1005 | int err; | |
1006 | ||
4b11111a MS |
1007 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
1008 | if (!fi) { | |
1da177e4 LT |
1009 | return err; |
1010 | } | |
1011 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); | |
c0b34438 | 1012 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
d664b6af | 1013 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
28de7948 | 1014 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
d664b6af | 1015 | cpu_to_le32(lvid_get_unique_id(inode->i_sb)); |
1da177e4 LT |
1016 | } |
1017 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); | |
c0b34438 | 1018 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1019 | mark_inode_dirty(dir); |
28de7948 | 1020 | |
1da177e4 | 1021 | if (fibh.sbh != fibh.ebh) |
3bf25cb4 JK |
1022 | brelse(fibh.ebh); |
1023 | brelse(fibh.sbh); | |
d8c76e6f | 1024 | inc_nlink(inode); |
1da177e4 LT |
1025 | inode->i_ctime = current_fs_time(inode->i_sb); |
1026 | mark_inode_dirty(inode); | |
7de9c6ee | 1027 | ihold(inode); |
1da177e4 | 1028 | d_instantiate(dentry, inode); |
28de7948 | 1029 | |
1da177e4 LT |
1030 | return 0; |
1031 | } | |
1032 | ||
1033 | /* Anybody can rename anything with this: the permission checks are left to the | |
1034 | * higher-level routines. | |
1035 | */ | |
cb00ea35 CG |
1036 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
1037 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1038 | { |
cb00ea35 CG |
1039 | struct inode *old_inode = old_dentry->d_inode; |
1040 | struct inode *new_inode = new_dentry->d_inode; | |
1da177e4 | 1041 | struct udf_fileident_bh ofibh, nfibh; |
4b11111a MS |
1042 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
1043 | struct fileIdentDesc ocfi, ncfi; | |
1da177e4 LT |
1044 | struct buffer_head *dir_bh = NULL; |
1045 | int retval = -ENOENT; | |
5ca4e4be | 1046 | struct kernel_lb_addr tloc; |
48d6d8ff | 1047 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
1da177e4 | 1048 | |
9fbb76ce | 1049 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
4b11111a | 1050 | if (ofi) { |
1da177e4 | 1051 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1052 | brelse(ofibh.ebh); |
1053 | brelse(ofibh.sbh); | |
1da177e4 LT |
1054 | } |
1055 | tloc = lelb_to_cpu(ocfi.icb.extLocation); | |
97e961fd | 1056 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
cb00ea35 | 1057 | != old_inode->i_ino) |
1da177e4 LT |
1058 | goto end_rename; |
1059 | ||
9fbb76ce | 1060 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
cb00ea35 CG |
1061 | if (nfi) { |
1062 | if (!new_inode) { | |
1da177e4 | 1063 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1064 | brelse(nfibh.ebh); |
1065 | brelse(nfibh.sbh); | |
1da177e4 LT |
1066 | nfi = NULL; |
1067 | } | |
1068 | } | |
cb00ea35 | 1069 | if (S_ISDIR(old_inode->i_mode)) { |
7f3fbd08 | 1070 | int offset = udf_ext0_offset(old_inode); |
1da177e4 | 1071 | |
cb00ea35 | 1072 | if (new_inode) { |
1da177e4 LT |
1073 | retval = -ENOTEMPTY; |
1074 | if (!empty_dir(new_inode)) | |
1075 | goto end_rename; | |
1076 | } | |
1077 | retval = -EIO; | |
48d6d8ff | 1078 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a | 1079 | dir_fi = udf_get_fileident( |
48d6d8ff MS |
1080 | old_iinfo->i_ext.i_data - |
1081 | (old_iinfo->i_efe ? | |
4b11111a MS |
1082 | sizeof(struct extendedFileEntry) : |
1083 | sizeof(struct fileEntry)), | |
1084 | old_inode->i_sb->s_blocksize, &offset); | |
cb00ea35 | 1085 | } else { |
1da177e4 LT |
1086 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
1087 | if (!dir_bh) | |
1088 | goto end_rename; | |
4b11111a MS |
1089 | dir_fi = udf_get_fileident(dir_bh->b_data, |
1090 | old_inode->i_sb->s_blocksize, &offset); | |
1da177e4 LT |
1091 | } |
1092 | if (!dir_fi) | |
1093 | goto end_rename; | |
1094 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); | |
97e961fd | 1095 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
4b11111a | 1096 | old_dir->i_ino) |
1da177e4 | 1097 | goto end_rename; |
1da177e4 | 1098 | } |
cb00ea35 | 1099 | if (!nfi) { |
4b11111a MS |
1100 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
1101 | &retval); | |
1da177e4 LT |
1102 | if (!nfi) |
1103 | goto end_rename; | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * Like most other Unix systems, set the ctime for inodes on a | |
1108 | * rename. | |
1109 | */ | |
1110 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); | |
1111 | mark_inode_dirty(old_inode); | |
1112 | ||
1113 | /* | |
1114 | * ok, that's it | |
1115 | */ | |
1116 | ncfi.fileVersionNum = ocfi.fileVersionNum; | |
1117 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; | |
5ca4e4be | 1118 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
1da177e4 LT |
1119 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
1120 | ||
1121 | /* The old fid may have moved - find it again */ | |
9fbb76ce | 1122 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
1da177e4 LT |
1123 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
1124 | ||
cb00ea35 | 1125 | if (new_inode) { |
1da177e4 | 1126 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
9a53c3a7 | 1127 | inode_dec_link_count(new_inode); |
1da177e4 LT |
1128 | } |
1129 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); | |
1130 | mark_inode_dirty(old_dir); | |
1131 | ||
cb00ea35 | 1132 | if (dir_fi) { |
c0b34438 | 1133 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
4b11111a MS |
1134 | udf_update_tag((char *)dir_fi, |
1135 | (sizeof(struct fileIdentDesc) + | |
1136 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); | |
48d6d8ff | 1137 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1da177e4 | 1138 | mark_inode_dirty(old_inode); |
4b11111a | 1139 | else |
1da177e4 | 1140 | mark_buffer_dirty_inode(dir_bh, old_inode); |
4b11111a | 1141 | |
9a53c3a7 | 1142 | inode_dec_link_count(old_dir); |
4b11111a | 1143 | if (new_inode) |
9a53c3a7 | 1144 | inode_dec_link_count(new_inode); |
4b11111a | 1145 | else { |
d8c76e6f | 1146 | inc_nlink(new_dir); |
1da177e4 LT |
1147 | mark_inode_dirty(new_dir); |
1148 | } | |
1149 | } | |
1150 | ||
cb00ea35 | 1151 | if (ofi) { |
1da177e4 | 1152 | if (ofibh.sbh != ofibh.ebh) |
3bf25cb4 JK |
1153 | brelse(ofibh.ebh); |
1154 | brelse(ofibh.sbh); | |
1da177e4 LT |
1155 | } |
1156 | ||
1157 | retval = 0; | |
1158 | ||
28de7948 | 1159 | end_rename: |
3bf25cb4 | 1160 | brelse(dir_bh); |
cb00ea35 | 1161 | if (nfi) { |
1da177e4 | 1162 | if (nfibh.sbh != nfibh.ebh) |
3bf25cb4 JK |
1163 | brelse(nfibh.ebh); |
1164 | brelse(nfibh.sbh); | |
1da177e4 | 1165 | } |
28de7948 | 1166 | |
1da177e4 LT |
1167 | return retval; |
1168 | } | |
1169 | ||
221e583a RR |
1170 | static struct dentry *udf_get_parent(struct dentry *child) |
1171 | { | |
97e961fd | 1172 | struct kernel_lb_addr tloc; |
221e583a | 1173 | struct inode *inode = NULL; |
26fe5750 | 1174 | struct qstr dotdot = QSTR_INIT("..", 2); |
221e583a RR |
1175 | struct fileIdentDesc cfi; |
1176 | struct udf_fileident_bh fibh; | |
1177 | ||
221e583a | 1178 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) |
6d3d5e86 | 1179 | return ERR_PTR(-EACCES); |
221e583a RR |
1180 | |
1181 | if (fibh.sbh != fibh.ebh) | |
1182 | brelse(fibh.ebh); | |
1183 | brelse(fibh.sbh); | |
1184 | ||
97e961fd PE |
1185 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
1186 | inode = udf_iget(child->d_inode->i_sb, &tloc); | |
6d3d5e86 JK |
1187 | if (IS_ERR(inode)) |
1188 | return ERR_CAST(inode); | |
221e583a | 1189 | |
44003728 | 1190 | return d_obtain_alias(inode); |
221e583a RR |
1191 | } |
1192 | ||
1193 | ||
1194 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, | |
1195 | u16 partref, __u32 generation) | |
1196 | { | |
1197 | struct inode *inode; | |
5ca4e4be | 1198 | struct kernel_lb_addr loc; |
221e583a RR |
1199 | |
1200 | if (block == 0) | |
1201 | return ERR_PTR(-ESTALE); | |
1202 | ||
1203 | loc.logicalBlockNum = block; | |
1204 | loc.partitionReferenceNum = partref; | |
97e961fd | 1205 | inode = udf_iget(sb, &loc); |
221e583a | 1206 | |
6d3d5e86 JK |
1207 | if (IS_ERR(inode)) |
1208 | return ERR_CAST(inode); | |
221e583a RR |
1209 | |
1210 | if (generation && inode->i_generation != generation) { | |
1211 | iput(inode); | |
1212 | return ERR_PTR(-ESTALE); | |
1213 | } | |
44003728 | 1214 | return d_obtain_alias(inode); |
221e583a RR |
1215 | } |
1216 | ||
1217 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, | |
1218 | struct fid *fid, int fh_len, int fh_type) | |
1219 | { | |
1220 | if ((fh_len != 3 && fh_len != 5) || | |
1221 | (fh_type != FILEID_UDF_WITH_PARENT && | |
1222 | fh_type != FILEID_UDF_WITHOUT_PARENT)) | |
1223 | return NULL; | |
1224 | ||
1225 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, | |
1226 | fid->udf.generation); | |
1227 | } | |
1228 | ||
1229 | static struct dentry *udf_fh_to_parent(struct super_block *sb, | |
1230 | struct fid *fid, int fh_len, int fh_type) | |
1231 | { | |
1232 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) | |
1233 | return NULL; | |
1234 | ||
1235 | return udf_nfs_get_inode(sb, fid->udf.parent_block, | |
1236 | fid->udf.parent_partref, | |
1237 | fid->udf.parent_generation); | |
1238 | } | |
b0b0382b AV |
1239 | static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp, |
1240 | struct inode *parent) | |
221e583a RR |
1241 | { |
1242 | int len = *lenp; | |
5ca4e4be | 1243 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
221e583a RR |
1244 | struct fid *fid = (struct fid *)fh; |
1245 | int type = FILEID_UDF_WITHOUT_PARENT; | |
1246 | ||
b0b0382b | 1247 | if (parent && (len < 5)) { |
5fe0c237 | 1248 | *lenp = 5; |
94e07a75 | 1249 | return FILEID_INVALID; |
5fe0c237 AK |
1250 | } else if (len < 3) { |
1251 | *lenp = 3; | |
94e07a75 | 1252 | return FILEID_INVALID; |
5fe0c237 | 1253 | } |
221e583a RR |
1254 | |
1255 | *lenp = 3; | |
1256 | fid->udf.block = location.logicalBlockNum; | |
1257 | fid->udf.partref = location.partitionReferenceNum; | |
0143fc5e | 1258 | fid->udf.parent_partref = 0; |
221e583a RR |
1259 | fid->udf.generation = inode->i_generation; |
1260 | ||
b0b0382b AV |
1261 | if (parent) { |
1262 | location = UDF_I(parent)->i_location; | |
221e583a RR |
1263 | fid->udf.parent_block = location.logicalBlockNum; |
1264 | fid->udf.parent_partref = location.partitionReferenceNum; | |
1265 | fid->udf.parent_generation = inode->i_generation; | |
221e583a RR |
1266 | *lenp = 5; |
1267 | type = FILEID_UDF_WITH_PARENT; | |
1268 | } | |
1269 | ||
1270 | return type; | |
1271 | } | |
1272 | ||
1273 | const struct export_operations udf_export_ops = { | |
1274 | .encode_fh = udf_encode_fh, | |
1275 | .fh_to_dentry = udf_fh_to_dentry, | |
1276 | .fh_to_parent = udf_fh_to_parent, | |
1277 | .get_parent = udf_get_parent, | |
1278 | }; | |
1279 | ||
c5ef1c42 | 1280 | const struct inode_operations udf_dir_inode_operations = { |
28de7948 CG |
1281 | .lookup = udf_lookup, |
1282 | .create = udf_create, | |
1283 | .link = udf_link, | |
1284 | .unlink = udf_unlink, | |
1285 | .symlink = udf_symlink, | |
1286 | .mkdir = udf_mkdir, | |
1287 | .rmdir = udf_rmdir, | |
1288 | .mknod = udf_mknod, | |
1289 | .rename = udf_rename, | |
656d09df | 1290 | .tmpfile = udf_tmpfile, |
1da177e4 | 1291 | }; |
c15d0fc0 DM |
1292 | const struct inode_operations udf_symlink_inode_operations = { |
1293 | .readlink = generic_readlink, | |
1294 | .follow_link = page_follow_link_light, | |
1295 | .put_link = page_put_link, | |
c15d0fc0 | 1296 | }; |