Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README | |
3 | * | |
4 | * Trivial changes by Alan Cox to remove EHASHCOLLISION for compatibility | |
5 | * | |
6 | * Trivial Changes: | |
7 | * Rights granted to Hans Reiser to redistribute under other terms providing | |
8 | * he accepts all liability including but not limited to patent, fitness | |
9 | * for purpose, and direct or indirect claims arising from failure to perform. | |
10 | * | |
11 | * NO WARRANTY | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/time.h> |
15 | #include <linux/bitops.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
f466c6fd | 17 | #include "reiserfs.h" |
a3063ab8 | 18 | #include "acl.h" |
c45ac888 | 19 | #include "xattr.h" |
1da177e4 LT |
20 | #include <linux/quotaops.h> |
21 | ||
bfe86848 | 22 | #define INC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) { inc_nlink(i); if (i->i_nlink >= REISERFS_LINK_MAX) set_nlink(i, 1); } |
9a53c3a7 | 23 | #define DEC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) drop_nlink(i); |
1da177e4 | 24 | |
098297b2 JM |
25 | /* |
26 | * directory item contains array of entry headers. This performs | |
27 | * binary search through that array | |
28 | */ | |
bd4c625c | 29 | static int bin_search_in_dir_item(struct reiserfs_dir_entry *de, loff_t off) |
1da177e4 | 30 | { |
bd4c625c LT |
31 | struct item_head *ih = de->de_ih; |
32 | struct reiserfs_de_head *deh = de->de_deh; | |
33 | int rbound, lbound, j; | |
34 | ||
35 | lbound = 0; | |
4cf5f7ad | 36 | rbound = ih_entry_count(ih) - 1; |
bd4c625c LT |
37 | |
38 | for (j = (rbound + lbound) / 2; lbound <= rbound; | |
39 | j = (rbound + lbound) / 2) { | |
40 | if (off < deh_offset(deh + j)) { | |
41 | rbound = j - 1; | |
42 | continue; | |
43 | } | |
44 | if (off > deh_offset(deh + j)) { | |
45 | lbound = j + 1; | |
46 | continue; | |
47 | } | |
098297b2 | 48 | /* this is not name found, but matched third key component */ |
bd4c625c LT |
49 | de->de_entry_num = j; |
50 | return NAME_FOUND; | |
1da177e4 | 51 | } |
1da177e4 | 52 | |
bd4c625c LT |
53 | de->de_entry_num = lbound; |
54 | return NAME_NOT_FOUND; | |
1da177e4 LT |
55 | } |
56 | ||
098297b2 JM |
57 | /* |
58 | * comment? maybe something like set de to point to what the path points to? | |
59 | */ | |
bd4c625c | 60 | static inline void set_de_item_location(struct reiserfs_dir_entry *de, |
fec6d055 | 61 | struct treepath *path) |
1da177e4 | 62 | { |
bd4c625c | 63 | de->de_bh = get_last_bh(path); |
4cf5f7ad | 64 | de->de_ih = tp_item_head(path); |
bd4c625c LT |
65 | de->de_deh = B_I_DEH(de->de_bh, de->de_ih); |
66 | de->de_item_num = PATH_LAST_POSITION(path); | |
67 | } | |
1da177e4 | 68 | |
098297b2 JM |
69 | /* |
70 | * de_bh, de_ih, de_deh (points to first element of array), de_item_num is set | |
71 | */ | |
bd4c625c | 72 | inline void set_de_name_and_namelen(struct reiserfs_dir_entry *de) |
1da177e4 | 73 | { |
bd4c625c | 74 | struct reiserfs_de_head *deh = de->de_deh + de->de_entry_num; |
1da177e4 | 75 | |
14a61442 | 76 | BUG_ON(de->de_entry_num >= ih_entry_count(de->de_ih)); |
1da177e4 | 77 | |
bd4c625c LT |
78 | de->de_entrylen = entry_length(de->de_bh, de->de_ih, de->de_entry_num); |
79 | de->de_namelen = de->de_entrylen - (de_with_sd(deh) ? SD_SIZE : 0); | |
4cf5f7ad | 80 | de->de_name = ih_item_body(de->de_bh, de->de_ih) + deh_location(deh); |
bd4c625c LT |
81 | if (de->de_name[de->de_namelen - 1] == 0) |
82 | de->de_namelen = strlen(de->de_name); | |
1da177e4 LT |
83 | } |
84 | ||
098297b2 | 85 | /* what entry points to */ |
bd4c625c | 86 | static inline void set_de_object_key(struct reiserfs_dir_entry *de) |
1da177e4 | 87 | { |
14a61442 | 88 | BUG_ON(de->de_entry_num >= ih_entry_count(de->de_ih)); |
a228bf8f JM |
89 | de->de_dir_id = deh_dir_id(&de->de_deh[de->de_entry_num]); |
90 | de->de_objectid = deh_objectid(&de->de_deh[de->de_entry_num]); | |
1da177e4 LT |
91 | } |
92 | ||
bd4c625c | 93 | static inline void store_de_entry_key(struct reiserfs_dir_entry *de) |
1da177e4 | 94 | { |
bd4c625c LT |
95 | struct reiserfs_de_head *deh = de->de_deh + de->de_entry_num; |
96 | ||
14a61442 | 97 | BUG_ON(de->de_entry_num >= ih_entry_count(de->de_ih)); |
bd4c625c LT |
98 | |
99 | /* store key of the found entry */ | |
100 | de->de_entry_key.version = KEY_FORMAT_3_5; | |
101 | de->de_entry_key.on_disk_key.k_dir_id = | |
102 | le32_to_cpu(de->de_ih->ih_key.k_dir_id); | |
103 | de->de_entry_key.on_disk_key.k_objectid = | |
104 | le32_to_cpu(de->de_ih->ih_key.k_objectid); | |
a228bf8f JM |
105 | set_cpu_key_k_offset(&de->de_entry_key, deh_offset(deh)); |
106 | set_cpu_key_k_type(&de->de_entry_key, TYPE_DIRENTRY); | |
1da177e4 LT |
107 | } |
108 | ||
098297b2 JM |
109 | /* |
110 | * We assign a key to each directory item, and place multiple entries in a | |
111 | * single directory item. A directory item has a key equal to the key of | |
112 | * the first directory entry in it. | |
113 | ||
114 | * This function first calls search_by_key, then, if item whose first entry | |
115 | * matches is not found it looks for the entry inside directory item found | |
116 | * by search_by_key. Fills the path to the entry, and to the entry position | |
117 | * in the item | |
118 | */ | |
1da177e4 | 119 | /* The function is NOT SCHEDULE-SAFE! */ |
bd4c625c | 120 | int search_by_entry_key(struct super_block *sb, const struct cpu_key *key, |
fec6d055 | 121 | struct treepath *path, struct reiserfs_dir_entry *de) |
1da177e4 | 122 | { |
bd4c625c LT |
123 | int retval; |
124 | ||
125 | retval = search_item(sb, key, path); | |
126 | switch (retval) { | |
127 | case ITEM_NOT_FOUND: | |
128 | if (!PATH_LAST_POSITION(path)) { | |
0030b645 JM |
129 | reiserfs_error(sb, "vs-7000", "search_by_key " |
130 | "returned item position == 0"); | |
bd4c625c LT |
131 | pathrelse(path); |
132 | return IO_ERROR; | |
133 | } | |
134 | PATH_LAST_POSITION(path)--; | |
135 | ||
136 | case ITEM_FOUND: | |
137 | break; | |
138 | ||
139 | case IO_ERROR: | |
140 | return retval; | |
141 | ||
142 | default: | |
143 | pathrelse(path); | |
0030b645 | 144 | reiserfs_error(sb, "vs-7002", "no path to here"); |
bd4c625c | 145 | return IO_ERROR; |
1da177e4 | 146 | } |
1da177e4 | 147 | |
bd4c625c | 148 | set_de_item_location(de, path); |
1da177e4 LT |
149 | |
150 | #ifdef CONFIG_REISERFS_CHECK | |
bd4c625c | 151 | if (!is_direntry_le_ih(de->de_ih) || |
a228bf8f | 152 | COMP_SHORT_KEYS(&de->de_ih->ih_key, key)) { |
bd4c625c | 153 | print_block(de->de_bh, 0, -1, -1); |
c3a9c210 JM |
154 | reiserfs_panic(sb, "vs-7005", "found item %h is not directory " |
155 | "item or does not belong to the same directory " | |
156 | "as key %K", de->de_ih, key); | |
bd4c625c LT |
157 | } |
158 | #endif /* CONFIG_REISERFS_CHECK */ | |
159 | ||
098297b2 JM |
160 | /* |
161 | * binary search in directory item by third component of the | |
162 | * key. sets de->de_entry_num of de | |
163 | */ | |
bd4c625c LT |
164 | retval = bin_search_in_dir_item(de, cpu_key_k_offset(key)); |
165 | path->pos_in_item = de->de_entry_num; | |
166 | if (retval != NAME_NOT_FOUND) { | |
098297b2 JM |
167 | /* |
168 | * ugly, but rename needs de_bh, de_deh, de_name, | |
169 | * de_namelen, de_objectid set | |
170 | */ | |
bd4c625c LT |
171 | set_de_name_and_namelen(de); |
172 | set_de_object_key(de); | |
173 | } | |
174 | return retval; | |
1da177e4 LT |
175 | } |
176 | ||
1da177e4 LT |
177 | /* Keyed 32-bit hash function using TEA in a Davis-Meyer function */ |
178 | ||
098297b2 JM |
179 | /* |
180 | * The third component is hashed, and you can choose from more than | |
181 | * one hash function. Per directory hashes are not yet implemented | |
182 | * but are thought about. This function should be moved to hashes.c | |
183 | * Jedi, please do so. -Hans | |
184 | */ | |
bd4c625c LT |
185 | static __u32 get_third_component(struct super_block *s, |
186 | const char *name, int len) | |
1da177e4 | 187 | { |
bd4c625c LT |
188 | __u32 res; |
189 | ||
190 | if (!len || (len == 1 && name[0] == '.')) | |
191 | return DOT_OFFSET; | |
192 | if (len == 2 && name[0] == '.' && name[1] == '.') | |
193 | return DOT_DOT_OFFSET; | |
194 | ||
195 | res = REISERFS_SB(s)->s_hash_function(name, len); | |
196 | ||
098297b2 | 197 | /* take bits from 7-th to 30-th including both bounds */ |
bd4c625c LT |
198 | res = GET_HASH_VALUE(res); |
199 | if (res == 0) | |
098297b2 JM |
200 | /* |
201 | * needed to have no names before "." and ".." those have hash | |
202 | * value == 0 and generation conters 1 and 2 accordingly | |
203 | */ | |
bd4c625c LT |
204 | res = 128; |
205 | return res + MAX_GENERATION_NUMBER; | |
1da177e4 LT |
206 | } |
207 | ||
bd4c625c LT |
208 | static int reiserfs_match(struct reiserfs_dir_entry *de, |
209 | const char *name, int namelen) | |
1da177e4 | 210 | { |
bd4c625c | 211 | int retval = NAME_NOT_FOUND; |
1da177e4 | 212 | |
bd4c625c LT |
213 | if ((namelen == de->de_namelen) && |
214 | !memcmp(de->de_name, name, de->de_namelen)) | |
215 | retval = | |
216 | (de_visible(de->de_deh + de->de_entry_num) ? NAME_FOUND : | |
217 | NAME_FOUND_INVISIBLE); | |
1da177e4 | 218 | |
bd4c625c | 219 | return retval; |
1da177e4 LT |
220 | } |
221 | ||
1da177e4 LT |
222 | /* de's de_bh, de_ih, de_deh, de_item_num, de_entry_num are set already */ |
223 | ||
098297b2 | 224 | /* used when hash collisions exist */ |
1da177e4 | 225 | |
bd4c625c LT |
226 | static int linear_search_in_dir_item(struct cpu_key *key, |
227 | struct reiserfs_dir_entry *de, | |
228 | const char *name, int namelen) | |
1da177e4 | 229 | { |
bd4c625c LT |
230 | struct reiserfs_de_head *deh = de->de_deh; |
231 | int retval; | |
232 | int i; | |
1da177e4 | 233 | |
bd4c625c | 234 | i = de->de_entry_num; |
1da177e4 | 235 | |
4cf5f7ad | 236 | if (i == ih_entry_count(de->de_ih) || |
bd4c625c LT |
237 | GET_HASH_VALUE(deh_offset(deh + i)) != |
238 | GET_HASH_VALUE(cpu_key_k_offset(key))) { | |
239 | i--; | |
240 | } | |
1da177e4 | 241 | |
bd4c625c LT |
242 | RFALSE(de->de_deh != B_I_DEH(de->de_bh, de->de_ih), |
243 | "vs-7010: array of entry headers not found"); | |
1da177e4 | 244 | |
bd4c625c | 245 | deh += i; |
1da177e4 | 246 | |
bd4c625c | 247 | for (; i >= 0; i--, deh--) { |
098297b2 | 248 | /* hash value does not match, no need to check whole name */ |
bd4c625c LT |
249 | if (GET_HASH_VALUE(deh_offset(deh)) != |
250 | GET_HASH_VALUE(cpu_key_k_offset(key))) { | |
bd4c625c LT |
251 | return NAME_NOT_FOUND; |
252 | } | |
253 | ||
098297b2 | 254 | /* mark that this generation number is used */ |
bd4c625c LT |
255 | if (de->de_gen_number_bit_string) |
256 | set_bit(GET_GENERATION_NUMBER(deh_offset(deh)), | |
3af1efe8 | 257 | de->de_gen_number_bit_string); |
1da177e4 | 258 | |
098297b2 | 259 | /* calculate pointer to name and namelen */ |
bd4c625c LT |
260 | de->de_entry_num = i; |
261 | set_de_name_and_namelen(de); | |
1da177e4 | 262 | |
098297b2 JM |
263 | /* |
264 | * de's de_name, de_namelen, de_recordlen are set. | |
265 | * Fill the rest. | |
266 | */ | |
bd4c625c LT |
267 | if ((retval = |
268 | reiserfs_match(de, name, namelen)) != NAME_NOT_FOUND) { | |
1da177e4 | 269 | |
098297b2 | 270 | /* key of pointed object */ |
bd4c625c | 271 | set_de_object_key(de); |
1da177e4 | 272 | |
bd4c625c | 273 | store_de_entry_key(de); |
1da177e4 | 274 | |
098297b2 | 275 | /* retval can be NAME_FOUND or NAME_FOUND_INVISIBLE */ |
bd4c625c LT |
276 | return retval; |
277 | } | |
1da177e4 | 278 | } |
1da177e4 | 279 | |
bd4c625c | 280 | if (GET_GENERATION_NUMBER(le_ih_k_offset(de->de_ih)) == 0) |
098297b2 JM |
281 | /* |
282 | * we have reached left most entry in the node. In common we | |
283 | * have to go to the left neighbor, but if generation counter | |
284 | * is 0 already, we know for sure, that there is no name with | |
285 | * the same hash value | |
286 | */ | |
287 | /* | |
288 | * FIXME: this work correctly only because hash value can not | |
289 | * be 0. Btw, in case of Yura's hash it is probably possible, | |
290 | * so, this is a bug | |
291 | */ | |
bd4c625c | 292 | return NAME_NOT_FOUND; |
1da177e4 | 293 | |
bd4c625c LT |
294 | RFALSE(de->de_item_num, |
295 | "vs-7015: two diritems of the same directory in one node?"); | |
1da177e4 | 296 | |
bd4c625c LT |
297 | return GOTO_PREVIOUS_ITEM; |
298 | } | |
1da177e4 | 299 | |
098297b2 JM |
300 | /* |
301 | * may return NAME_FOUND, NAME_FOUND_INVISIBLE, NAME_NOT_FOUND | |
302 | * FIXME: should add something like IOERROR | |
303 | */ | |
bd4c625c | 304 | static int reiserfs_find_entry(struct inode *dir, const char *name, int namelen, |
fec6d055 | 305 | struct treepath *path_to_entry, |
bd4c625c | 306 | struct reiserfs_dir_entry *de) |
1da177e4 | 307 | { |
bd4c625c LT |
308 | struct cpu_key key_to_search; |
309 | int retval; | |
310 | ||
311 | if (namelen > REISERFS_MAX_NAME(dir->i_sb->s_blocksize)) | |
312 | return NAME_NOT_FOUND; | |
313 | ||
314 | /* we will search for this key in the tree */ | |
315 | make_cpu_key(&key_to_search, dir, | |
316 | get_third_component(dir->i_sb, name, namelen), | |
317 | TYPE_DIRENTRY, 3); | |
318 | ||
319 | while (1) { | |
320 | retval = | |
321 | search_by_entry_key(dir->i_sb, &key_to_search, | |
322 | path_to_entry, de); | |
323 | if (retval == IO_ERROR) { | |
0030b645 | 324 | reiserfs_error(dir->i_sb, "zam-7001", "io error"); |
bd4c625c LT |
325 | return IO_ERROR; |
326 | } | |
327 | ||
328 | /* compare names for all entries having given hash value */ | |
329 | retval = | |
330 | linear_search_in_dir_item(&key_to_search, de, name, | |
331 | namelen); | |
098297b2 JM |
332 | /* |
333 | * there is no need to scan directory anymore. | |
334 | * Given entry found or does not exist | |
335 | */ | |
bd4c625c | 336 | if (retval != GOTO_PREVIOUS_ITEM) { |
bd4c625c LT |
337 | path_to_entry->pos_in_item = de->de_entry_num; |
338 | return retval; | |
339 | } | |
340 | ||
098297b2 JM |
341 | /* |
342 | * there is left neighboring item of this directory | |
343 | * and given entry can be there | |
344 | */ | |
bd4c625c LT |
345 | set_cpu_key_k_offset(&key_to_search, |
346 | le_ih_k_offset(de->de_ih) - 1); | |
347 | pathrelse(path_to_entry); | |
348 | ||
349 | } /* while (1) */ | |
1da177e4 LT |
350 | } |
351 | ||
bd4c625c | 352 | static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 353 | unsigned int flags) |
1da177e4 | 354 | { |
bd4c625c LT |
355 | int retval; |
356 | struct inode *inode = NULL; | |
357 | struct reiserfs_dir_entry de; | |
358 | INITIALIZE_PATH(path_to_entry); | |
359 | ||
360 | if (REISERFS_MAX_NAME(dir->i_sb->s_blocksize) < dentry->d_name.len) | |
361 | return ERR_PTR(-ENAMETOOLONG); | |
362 | ||
278f6679 | 363 | reiserfs_write_lock(dir->i_sb); |
b1c839bb | 364 | |
bd4c625c LT |
365 | de.de_gen_number_bit_string = NULL; |
366 | retval = | |
367 | reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, | |
368 | &path_to_entry, &de); | |
369 | pathrelse(&path_to_entry); | |
370 | if (retval == NAME_FOUND) { | |
677c9b2e | 371 | inode = reiserfs_iget(dir->i_sb, |
a228bf8f | 372 | (struct cpu_key *)&de.de_dir_id); |
bd4c625c | 373 | if (!inode || IS_ERR(inode)) { |
278f6679 | 374 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c LT |
375 | return ERR_PTR(-EACCES); |
376 | } | |
377 | ||
098297b2 JM |
378 | /* |
379 | * Propagate the private flag so we know we're | |
380 | * in the priv tree | |
381 | */ | |
6dfede69 JM |
382 | if (IS_PRIVATE(dir)) |
383 | inode->i_flags |= S_PRIVATE; | |
bd4c625c | 384 | } |
278f6679 | 385 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c LT |
386 | if (retval == IO_ERROR) { |
387 | return ERR_PTR(-EIO); | |
1da177e4 LT |
388 | } |
389 | ||
d9975d6b | 390 | return d_splice_alias(inode, dentry); |
bd4c625c | 391 | } |
1da177e4 | 392 | |
0222e657 | 393 | /* |
098297b2 JM |
394 | * looks up the dentry of the parent directory for child. |
395 | * taken from ext2_get_parent | |
396 | */ | |
1da177e4 LT |
397 | struct dentry *reiserfs_get_parent(struct dentry *child) |
398 | { | |
bd4c625c LT |
399 | int retval; |
400 | struct inode *inode = NULL; | |
401 | struct reiserfs_dir_entry de; | |
402 | INITIALIZE_PATH(path_to_entry); | |
bd4c625c LT |
403 | struct inode *dir = child->d_inode; |
404 | ||
405 | if (dir->i_nlink == 0) { | |
406 | return ERR_PTR(-ENOENT); | |
407 | } | |
408 | de.de_gen_number_bit_string = NULL; | |
409 | ||
410 | reiserfs_write_lock(dir->i_sb); | |
411 | retval = reiserfs_find_entry(dir, "..", 2, &path_to_entry, &de); | |
412 | pathrelse(&path_to_entry); | |
413 | if (retval != NAME_FOUND) { | |
414 | reiserfs_write_unlock(dir->i_sb); | |
415 | return ERR_PTR(-ENOENT); | |
416 | } | |
a228bf8f | 417 | inode = reiserfs_iget(dir->i_sb, (struct cpu_key *)&de.de_dir_id); |
1da177e4 | 418 | reiserfs_write_unlock(dir->i_sb); |
1da177e4 | 419 | |
44003728 | 420 | return d_obtain_alias(inode); |
bd4c625c | 421 | } |
1da177e4 | 422 | |
0222e657 | 423 | /* add entry to the directory (entry can be hidden). |
1da177e4 LT |
424 | |
425 | insert definition of when hidden directories are used here -Hans | |
426 | ||
427 | Does not mark dir inode dirty, do it after successesfull call to it */ | |
428 | ||
bd4c625c LT |
429 | static int reiserfs_add_entry(struct reiserfs_transaction_handle *th, |
430 | struct inode *dir, const char *name, int namelen, | |
431 | struct inode *inode, int visible) | |
1da177e4 | 432 | { |
bd4c625c LT |
433 | struct cpu_key entry_key; |
434 | struct reiserfs_de_head *deh; | |
435 | INITIALIZE_PATH(path); | |
436 | struct reiserfs_dir_entry de; | |
3af1efe8 | 437 | DECLARE_BITMAP(bit_string, MAX_GENERATION_NUMBER + 1); |
bd4c625c | 438 | int gen_number; |
098297b2 JM |
439 | |
440 | /* | |
441 | * 48 bytes now and we avoid kmalloc if we | |
442 | * create file with short name | |
443 | */ | |
444 | char small_buf[32 + DEH_SIZE]; | |
445 | ||
bd4c625c LT |
446 | char *buffer; |
447 | int buflen, paste_size; | |
448 | int retval; | |
449 | ||
450 | BUG_ON(!th->t_trans_id); | |
451 | ||
452 | /* cannot allow items to be added into a busy deleted directory */ | |
453 | if (!namelen) | |
454 | return -EINVAL; | |
455 | ||
456 | if (namelen > REISERFS_MAX_NAME(dir->i_sb->s_blocksize)) | |
457 | return -ENAMETOOLONG; | |
458 | ||
459 | /* each entry has unique key. compose it */ | |
460 | make_cpu_key(&entry_key, dir, | |
461 | get_third_component(dir->i_sb, name, namelen), | |
462 | TYPE_DIRENTRY, 3); | |
463 | ||
464 | /* get memory for composing the entry */ | |
465 | buflen = DEH_SIZE + ROUND_UP(namelen); | |
466 | if (buflen > sizeof(small_buf)) { | |
d739b42b | 467 | buffer = kmalloc(buflen, GFP_NOFS); |
9dce07f1 | 468 | if (!buffer) |
bd4c625c LT |
469 | return -ENOMEM; |
470 | } else | |
471 | buffer = small_buf; | |
472 | ||
473 | paste_size = | |
474 | (get_inode_sd_version(dir) == | |
475 | STAT_DATA_V1) ? (DEH_SIZE + namelen) : buflen; | |
476 | ||
098297b2 JM |
477 | /* |
478 | * fill buffer : directory entry head, name[, dir objectid | , | |
479 | * stat data | ,stat data, dir objectid ] | |
480 | */ | |
bd4c625c LT |
481 | deh = (struct reiserfs_de_head *)buffer; |
482 | deh->deh_location = 0; /* JDM Endian safe if 0 */ | |
483 | put_deh_offset(deh, cpu_key_k_offset(&entry_key)); | |
484 | deh->deh_state = 0; /* JDM Endian safe if 0 */ | |
485 | /* put key (ino analog) to de */ | |
098297b2 JM |
486 | |
487 | /* safe: k_dir_id is le */ | |
488 | deh->deh_dir_id = INODE_PKEY(inode)->k_dir_id; | |
489 | /* safe: k_objectid is le */ | |
490 | deh->deh_objectid = INODE_PKEY(inode)->k_objectid; | |
bd4c625c LT |
491 | |
492 | /* copy name */ | |
493 | memcpy((char *)(deh + 1), name, namelen); | |
494 | /* padd by 0s to the 4 byte boundary */ | |
495 | padd_item((char *)(deh + 1), ROUND_UP(namelen), namelen); | |
496 | ||
098297b2 JM |
497 | /* |
498 | * entry is ready to be pasted into tree, set 'visibility' | |
499 | * and 'stat data in entry' attributes | |
500 | */ | |
bd4c625c LT |
501 | mark_de_without_sd(deh); |
502 | visible ? mark_de_visible(deh) : mark_de_hidden(deh); | |
503 | ||
504 | /* find the proper place for the new entry */ | |
505 | memset(bit_string, 0, sizeof(bit_string)); | |
3af1efe8 | 506 | de.de_gen_number_bit_string = bit_string; |
bd4c625c LT |
507 | retval = reiserfs_find_entry(dir, name, namelen, &path, &de); |
508 | if (retval != NAME_NOT_FOUND) { | |
509 | if (buffer != small_buf) | |
d739b42b | 510 | kfree(buffer); |
bd4c625c LT |
511 | pathrelse(&path); |
512 | ||
513 | if (retval == IO_ERROR) { | |
514 | return -EIO; | |
515 | } | |
516 | ||
517 | if (retval != NAME_FOUND) { | |
0030b645 JM |
518 | reiserfs_error(dir->i_sb, "zam-7002", |
519 | "reiserfs_find_entry() returned " | |
520 | "unexpected value (%d)", retval); | |
bd4c625c LT |
521 | } |
522 | ||
523 | return -EEXIST; | |
524 | } | |
1da177e4 | 525 | |
bd4c625c | 526 | gen_number = |
3af1efe8 | 527 | find_first_zero_bit(bit_string, |
bd4c625c LT |
528 | MAX_GENERATION_NUMBER + 1); |
529 | if (gen_number > MAX_GENERATION_NUMBER) { | |
530 | /* there is no free generation number */ | |
45b03d5e JM |
531 | reiserfs_warning(dir->i_sb, "reiserfs-7010", |
532 | "Congratulations! we have got hash function " | |
533 | "screwed up"); | |
bd4c625c | 534 | if (buffer != small_buf) |
d739b42b | 535 | kfree(buffer); |
bd4c625c LT |
536 | pathrelse(&path); |
537 | return -EBUSY; | |
538 | } | |
539 | /* adjust offset of directory enrty */ | |
540 | put_deh_offset(deh, SET_GENERATION_NUMBER(deh_offset(deh), gen_number)); | |
541 | set_cpu_key_k_offset(&entry_key, deh_offset(deh)); | |
542 | ||
543 | /* update max-hash-collisions counter in reiserfs_sb_info */ | |
544 | PROC_INFO_MAX(th->t_super, max_hash_collisions, gen_number); | |
545 | ||
098297b2 JM |
546 | /* we need to re-search for the insertion point */ |
547 | if (gen_number != 0) { | |
bd4c625c LT |
548 | if (search_by_entry_key(dir->i_sb, &entry_key, &path, &de) != |
549 | NAME_NOT_FOUND) { | |
45b03d5e JM |
550 | reiserfs_warning(dir->i_sb, "vs-7032", |
551 | "entry with this key (%K) already " | |
552 | "exists", &entry_key); | |
bd4c625c LT |
553 | |
554 | if (buffer != small_buf) | |
d739b42b | 555 | kfree(buffer); |
bd4c625c LT |
556 | pathrelse(&path); |
557 | return -EBUSY; | |
558 | } | |
1da177e4 LT |
559 | } |
560 | ||
bd4c625c LT |
561 | /* perform the insertion of the entry that we have prepared */ |
562 | retval = | |
563 | reiserfs_paste_into_item(th, &path, &entry_key, dir, buffer, | |
564 | paste_size); | |
565 | if (buffer != small_buf) | |
d739b42b | 566 | kfree(buffer); |
bd4c625c LT |
567 | if (retval) { |
568 | reiserfs_check_path(&path); | |
569 | return retval; | |
1da177e4 | 570 | } |
1da177e4 | 571 | |
bd4c625c LT |
572 | dir->i_size += paste_size; |
573 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; | |
574 | if (!S_ISDIR(inode->i_mode) && visible) | |
098297b2 | 575 | /* reiserfs_mkdir or reiserfs_rename will do that by itself */ |
bd4c625c | 576 | reiserfs_update_sd(th, dir); |
1da177e4 | 577 | |
bd4c625c LT |
578 | reiserfs_check_path(&path); |
579 | return 0; | |
1da177e4 LT |
580 | } |
581 | ||
098297b2 JM |
582 | /* |
583 | * quota utility function, call if you've had to abort after calling | |
584 | * new_inode_init, and have not called reiserfs_new_inode yet. | |
585 | * This should only be called on inodes that do not have stat data | |
586 | * inserted into the tree yet. | |
587 | */ | |
bd4c625c LT |
588 | static int drop_new_inode(struct inode *inode) |
589 | { | |
9f754758 | 590 | dquot_drop(inode); |
bd4c625c LT |
591 | make_bad_inode(inode); |
592 | inode->i_flags |= S_NOQUOTA; | |
593 | iput(inode); | |
594 | return 0; | |
1da177e4 LT |
595 | } |
596 | ||
098297b2 JM |
597 | /* |
598 | * utility function that does setup for reiserfs_new_inode. | |
599 | * dquot_initialize needs lots of credits so it's better to have it | |
600 | * outside of a transaction, so we had to pull some bits of | |
601 | * reiserfs_new_inode out into this func. | |
602 | */ | |
8e071892 | 603 | static int new_inode_init(struct inode *inode, struct inode *dir, umode_t mode) |
bd4c625c | 604 | { |
098297b2 JM |
605 | /* |
606 | * Make inode invalid - just in case we are going to drop it before | |
607 | * the initialization happens | |
608 | */ | |
1b0a74d1 | 609 | INODE_PKEY(inode)->k_objectid = 0; |
098297b2 JM |
610 | |
611 | /* | |
612 | * the quota init calls have to know who to charge the quota to, so | |
613 | * we have to set uid and gid here | |
04b7ed0d DM |
614 | */ |
615 | inode_init_owner(inode, dir, mode); | |
871a2931 | 616 | dquot_initialize(inode); |
bd4c625c | 617 | return 0; |
1da177e4 LT |
618 | } |
619 | ||
4acdaf27 | 620 | static int reiserfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 621 | bool excl) |
1da177e4 | 622 | { |
bd4c625c LT |
623 | int retval; |
624 | struct inode *inode; | |
098297b2 JM |
625 | /* |
626 | * We need blocks for transaction + (user+group)*(quotas | |
627 | * for new inode + update of quota for directory owner) | |
628 | */ | |
bd4c625c LT |
629 | int jbegin_count = |
630 | JOURNAL_PER_BALANCE_CNT * 2 + | |
631 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
632 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
633 | struct reiserfs_transaction_handle th; | |
57fe60df | 634 | struct reiserfs_security_handle security; |
bd4c625c | 635 | |
871a2931 | 636 | dquot_initialize(dir); |
907f4554 | 637 | |
bd4c625c LT |
638 | if (!(inode = new_inode(dir->i_sb))) { |
639 | return -ENOMEM; | |
640 | } | |
641 | new_inode_init(inode, dir, mode); | |
1da177e4 | 642 | |
0ab2621e | 643 | jbegin_count += reiserfs_cache_default_acl(dir); |
2a7dba39 | 644 | retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); |
57fe60df JM |
645 | if (retval < 0) { |
646 | drop_new_inode(inode); | |
647 | return retval; | |
648 | } | |
649 | jbegin_count += retval; | |
bd4c625c | 650 | reiserfs_write_lock(dir->i_sb); |
1da177e4 | 651 | |
bd4c625c LT |
652 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
653 | if (retval) { | |
654 | drop_new_inode(inode); | |
655 | goto out_failed; | |
656 | } | |
657 | ||
658 | retval = | |
659 | reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry, | |
57fe60df | 660 | inode, &security); |
bd4c625c LT |
661 | if (retval) |
662 | goto out_failed; | |
663 | ||
bd4c625c LT |
664 | inode->i_op = &reiserfs_file_inode_operations; |
665 | inode->i_fop = &reiserfs_file_operations; | |
666 | inode->i_mapping->a_ops = &reiserfs_address_space_operations; | |
667 | ||
668 | retval = | |
669 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
670 | dentry->d_name.len, inode, 1 /*visible */ ); | |
671 | if (retval) { | |
672 | int err; | |
6d6b77f1 | 673 | drop_nlink(inode); |
bd4c625c | 674 | reiserfs_update_sd(&th, inode); |
58d85426 | 675 | err = journal_end(&th); |
bd4c625c LT |
676 | if (err) |
677 | retval = err; | |
c1eaa26b | 678 | unlock_new_inode(inode); |
bd4c625c LT |
679 | iput(inode); |
680 | goto out_failed; | |
681 | } | |
682 | reiserfs_update_inode_transaction(inode); | |
683 | reiserfs_update_inode_transaction(dir); | |
1da177e4 | 684 | |
c1eaa26b | 685 | unlock_new_inode(inode); |
8fc37ec5 | 686 | d_instantiate(dentry, inode); |
58d85426 | 687 | retval = journal_end(&th); |
1da177e4 | 688 | |
cf776a7a | 689 | out_failed: |
bd4c625c LT |
690 | reiserfs_write_unlock(dir->i_sb); |
691 | return retval; | |
692 | } | |
1da177e4 | 693 | |
1a67aafb | 694 | static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
bd4c625c LT |
695 | dev_t rdev) |
696 | { | |
697 | int retval; | |
698 | struct inode *inode; | |
699 | struct reiserfs_transaction_handle th; | |
57fe60df | 700 | struct reiserfs_security_handle security; |
098297b2 JM |
701 | /* |
702 | * We need blocks for transaction + (user+group)*(quotas | |
703 | * for new inode + update of quota for directory owner) | |
704 | */ | |
bd4c625c LT |
705 | int jbegin_count = |
706 | JOURNAL_PER_BALANCE_CNT * 3 + | |
707 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
708 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
bd4c625c LT |
709 | |
710 | if (!new_valid_dev(rdev)) | |
711 | return -EINVAL; | |
712 | ||
871a2931 | 713 | dquot_initialize(dir); |
907f4554 | 714 | |
bd4c625c LT |
715 | if (!(inode = new_inode(dir->i_sb))) { |
716 | return -ENOMEM; | |
717 | } | |
718 | new_inode_init(inode, dir, mode); | |
1da177e4 | 719 | |
0ab2621e | 720 | jbegin_count += reiserfs_cache_default_acl(dir); |
2a7dba39 | 721 | retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); |
57fe60df JM |
722 | if (retval < 0) { |
723 | drop_new_inode(inode); | |
724 | return retval; | |
725 | } | |
726 | jbegin_count += retval; | |
bd4c625c | 727 | reiserfs_write_lock(dir->i_sb); |
1da177e4 | 728 | |
bd4c625c LT |
729 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
730 | if (retval) { | |
731 | drop_new_inode(inode); | |
732 | goto out_failed; | |
733 | } | |
1da177e4 | 734 | |
bd4c625c LT |
735 | retval = |
736 | reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry, | |
57fe60df | 737 | inode, &security); |
bd4c625c LT |
738 | if (retval) { |
739 | goto out_failed; | |
740 | } | |
1da177e4 | 741 | |
bd4c625c LT |
742 | inode->i_op = &reiserfs_special_inode_operations; |
743 | init_special_inode(inode, inode->i_mode, rdev); | |
744 | ||
098297b2 | 745 | /* FIXME: needed for block and char devices only */ |
bd4c625c LT |
746 | reiserfs_update_sd(&th, inode); |
747 | ||
748 | reiserfs_update_inode_transaction(inode); | |
749 | reiserfs_update_inode_transaction(dir); | |
750 | ||
751 | retval = | |
752 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
753 | dentry->d_name.len, inode, 1 /*visible */ ); | |
754 | if (retval) { | |
755 | int err; | |
6d6b77f1 | 756 | drop_nlink(inode); |
bd4c625c | 757 | reiserfs_update_sd(&th, inode); |
58d85426 | 758 | err = journal_end(&th); |
bd4c625c LT |
759 | if (err) |
760 | retval = err; | |
c1eaa26b | 761 | unlock_new_inode(inode); |
bd4c625c LT |
762 | iput(inode); |
763 | goto out_failed; | |
764 | } | |
1da177e4 | 765 | |
c1eaa26b | 766 | unlock_new_inode(inode); |
8fc37ec5 | 767 | d_instantiate(dentry, inode); |
58d85426 | 768 | retval = journal_end(&th); |
1da177e4 | 769 | |
cf776a7a | 770 | out_failed: |
bd4c625c LT |
771 | reiserfs_write_unlock(dir->i_sb); |
772 | return retval; | |
1da177e4 LT |
773 | } |
774 | ||
18bb1db3 | 775 | static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
1da177e4 | 776 | { |
bd4c625c LT |
777 | int retval; |
778 | struct inode *inode; | |
779 | struct reiserfs_transaction_handle th; | |
57fe60df | 780 | struct reiserfs_security_handle security; |
098297b2 JM |
781 | /* |
782 | * We need blocks for transaction + (user+group)*(quotas | |
783 | * for new inode + update of quota for directory owner) | |
784 | */ | |
bd4c625c LT |
785 | int jbegin_count = |
786 | JOURNAL_PER_BALANCE_CNT * 3 + | |
787 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
788 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
1da177e4 | 789 | |
871a2931 | 790 | dquot_initialize(dir); |
907f4554 | 791 | |
1da177e4 | 792 | #ifdef DISPLACE_NEW_PACKING_LOCALITIES |
098297b2 JM |
793 | /* |
794 | * set flag that new packing locality created and new blocks | |
795 | * for the content of that directory are not displaced yet | |
796 | */ | |
bd4c625c | 797 | REISERFS_I(dir)->new_packing_locality = 1; |
1da177e4 | 798 | #endif |
bd4c625c LT |
799 | mode = S_IFDIR | mode; |
800 | if (!(inode = new_inode(dir->i_sb))) { | |
801 | return -ENOMEM; | |
802 | } | |
803 | new_inode_init(inode, dir, mode); | |
804 | ||
0ab2621e | 805 | jbegin_count += reiserfs_cache_default_acl(dir); |
2a7dba39 | 806 | retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); |
57fe60df JM |
807 | if (retval < 0) { |
808 | drop_new_inode(inode); | |
809 | return retval; | |
810 | } | |
811 | jbegin_count += retval; | |
278f6679 | 812 | reiserfs_write_lock(dir->i_sb); |
bd4c625c LT |
813 | |
814 | retval = journal_begin(&th, dir->i_sb, jbegin_count); | |
815 | if (retval) { | |
816 | drop_new_inode(inode); | |
817 | goto out_failed; | |
818 | } | |
1da177e4 | 819 | |
098297b2 JM |
820 | /* |
821 | * inc the link count now, so another writer doesn't overflow | |
822 | * it while we sleep later on. | |
bd4c625c LT |
823 | */ |
824 | INC_DIR_INODE_NLINK(dir) | |
825 | ||
826 | retval = reiserfs_new_inode(&th, dir, mode, NULL /*symlink */ , | |
827 | old_format_only(dir->i_sb) ? | |
828 | EMPTY_DIR_SIZE_V1 : EMPTY_DIR_SIZE, | |
57fe60df | 829 | dentry, inode, &security); |
bd4c625c | 830 | if (retval) { |
99890a3b | 831 | DEC_DIR_INODE_NLINK(dir) |
bd4c625c LT |
832 | goto out_failed; |
833 | } | |
834 | ||
bd4c625c LT |
835 | reiserfs_update_inode_transaction(inode); |
836 | reiserfs_update_inode_transaction(dir); | |
837 | ||
838 | inode->i_op = &reiserfs_dir_inode_operations; | |
839 | inode->i_fop = &reiserfs_dir_operations; | |
840 | ||
098297b2 | 841 | /* note, _this_ add_entry will not update dir's stat data */ |
bd4c625c LT |
842 | retval = |
843 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
844 | dentry->d_name.len, inode, 1 /*visible */ ); | |
845 | if (retval) { | |
846 | int err; | |
6d6b77f1 | 847 | clear_nlink(inode); |
bd4c625c LT |
848 | DEC_DIR_INODE_NLINK(dir); |
849 | reiserfs_update_sd(&th, inode); | |
58d85426 | 850 | err = journal_end(&th); |
bd4c625c LT |
851 | if (err) |
852 | retval = err; | |
c1eaa26b | 853 | unlock_new_inode(inode); |
bd4c625c LT |
854 | iput(inode); |
855 | goto out_failed; | |
856 | } | |
098297b2 | 857 | /* the above add_entry did not update dir's stat data */ |
bd4c625c LT |
858 | reiserfs_update_sd(&th, dir); |
859 | ||
c1eaa26b | 860 | unlock_new_inode(inode); |
8fc37ec5 | 861 | d_instantiate(dentry, inode); |
58d85426 | 862 | retval = journal_end(&th); |
b10ab4c3 | 863 | out_failed: |
278f6679 | 864 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c | 865 | return retval; |
1da177e4 LT |
866 | } |
867 | ||
bd4c625c | 868 | static inline int reiserfs_empty_dir(struct inode *inode) |
1da177e4 | 869 | { |
098297b2 JM |
870 | /* |
871 | * we can cheat because an old format dir cannot have | |
872 | * EMPTY_DIR_SIZE, and a new format dir cannot have | |
873 | * EMPTY_DIR_SIZE_V1. So, if the inode is either size, | |
874 | * regardless of disk format version, the directory is empty. | |
bd4c625c LT |
875 | */ |
876 | if (inode->i_size != EMPTY_DIR_SIZE && | |
877 | inode->i_size != EMPTY_DIR_SIZE_V1) { | |
878 | return 0; | |
879 | } | |
880 | return 1; | |
1da177e4 LT |
881 | } |
882 | ||
bd4c625c | 883 | static int reiserfs_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 | 884 | { |
bd4c625c LT |
885 | int retval, err; |
886 | struct inode *inode; | |
887 | struct reiserfs_transaction_handle th; | |
888 | int jbegin_count; | |
889 | INITIALIZE_PATH(path); | |
890 | struct reiserfs_dir_entry de; | |
891 | ||
098297b2 JM |
892 | /* |
893 | * we will be doing 2 balancings and update 2 stat data, we | |
894 | * change quotas of the owner of the directory and of the owner | |
895 | * of the parent directory. The quota structure is possibly | |
896 | * deleted only on last iput => outside of this transaction | |
897 | */ | |
bd4c625c LT |
898 | jbegin_count = |
899 | JOURNAL_PER_BALANCE_CNT * 2 + 2 + | |
900 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
901 | ||
871a2931 | 902 | dquot_initialize(dir); |
907f4554 | 903 | |
bd4c625c LT |
904 | reiserfs_write_lock(dir->i_sb); |
905 | retval = journal_begin(&th, dir->i_sb, jbegin_count); | |
906 | if (retval) | |
907 | goto out_rmdir; | |
908 | ||
909 | de.de_gen_number_bit_string = NULL; | |
910 | if ((retval = | |
911 | reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, | |
912 | &path, &de)) == NAME_NOT_FOUND) { | |
913 | retval = -ENOENT; | |
914 | goto end_rmdir; | |
915 | } else if (retval == IO_ERROR) { | |
916 | retval = -EIO; | |
917 | goto end_rmdir; | |
918 | } | |
919 | ||
920 | inode = dentry->d_inode; | |
921 | ||
922 | reiserfs_update_inode_transaction(inode); | |
923 | reiserfs_update_inode_transaction(dir); | |
924 | ||
925 | if (de.de_objectid != inode->i_ino) { | |
098297b2 JM |
926 | /* |
927 | * FIXME: compare key of an object and a key found in the entry | |
928 | */ | |
bd4c625c LT |
929 | retval = -EIO; |
930 | goto end_rmdir; | |
931 | } | |
932 | if (!reiserfs_empty_dir(inode)) { | |
933 | retval = -ENOTEMPTY; | |
934 | goto end_rmdir; | |
935 | } | |
936 | ||
937 | /* cut entry from dir directory */ | |
a228bf8f JM |
938 | retval = reiserfs_cut_from_item(&th, &path, &de.de_entry_key, |
939 | dir, NULL, /* page */ | |
bd4c625c LT |
940 | 0 /*new file size - not used here */ ); |
941 | if (retval < 0) | |
942 | goto end_rmdir; | |
943 | ||
944 | if (inode->i_nlink != 2 && inode->i_nlink != 1) | |
0030b645 JM |
945 | reiserfs_error(inode->i_sb, "reiserfs-7040", |
946 | "empty directory has nlink != 2 (%d)", | |
947 | inode->i_nlink); | |
bd4c625c | 948 | |
ce71ec36 | 949 | clear_nlink(inode); |
bd4c625c LT |
950 | inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC; |
951 | reiserfs_update_sd(&th, inode); | |
952 | ||
953 | DEC_DIR_INODE_NLINK(dir) | |
954 | dir->i_size -= (DEH_SIZE + de.de_entrylen); | |
955 | reiserfs_update_sd(&th, dir); | |
956 | ||
957 | /* prevent empty directory from getting lost */ | |
958 | add_save_link(&th, inode, 0 /* not truncate */ ); | |
959 | ||
58d85426 | 960 | retval = journal_end(&th); |
bd4c625c | 961 | reiserfs_check_path(&path); |
cf776a7a | 962 | out_rmdir: |
bd4c625c LT |
963 | reiserfs_write_unlock(dir->i_sb); |
964 | return retval; | |
965 | ||
cf776a7a | 966 | end_rmdir: |
098297b2 JM |
967 | /* |
968 | * we must release path, because we did not call | |
969 | * reiserfs_cut_from_item, or reiserfs_cut_from_item does not | |
970 | * release path if operation was not complete | |
971 | */ | |
bd4c625c | 972 | pathrelse(&path); |
58d85426 | 973 | err = journal_end(&th); |
bd4c625c LT |
974 | reiserfs_write_unlock(dir->i_sb); |
975 | return err ? err : retval; | |
1da177e4 LT |
976 | } |
977 | ||
bd4c625c | 978 | static int reiserfs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 | 979 | { |
bd4c625c LT |
980 | int retval, err; |
981 | struct inode *inode; | |
982 | struct reiserfs_dir_entry de; | |
983 | INITIALIZE_PATH(path); | |
984 | struct reiserfs_transaction_handle th; | |
985 | int jbegin_count; | |
986 | unsigned long savelink; | |
987 | ||
871a2931 | 988 | dquot_initialize(dir); |
907f4554 | 989 | |
bd4c625c LT |
990 | inode = dentry->d_inode; |
991 | ||
098297b2 JM |
992 | /* |
993 | * in this transaction we can be doing at max two balancings and | |
994 | * update two stat datas, we change quotas of the owner of the | |
995 | * directory and of the owner of the parent directory. The quota | |
996 | * structure is possibly deleted only on iput => outside of | |
997 | * this transaction | |
998 | */ | |
bd4c625c LT |
999 | jbegin_count = |
1000 | JOURNAL_PER_BALANCE_CNT * 2 + 2 + | |
1001 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
1002 | ||
278f6679 | 1003 | reiserfs_write_lock(dir->i_sb); |
bd4c625c LT |
1004 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
1005 | if (retval) | |
1006 | goto out_unlink; | |
1007 | ||
1008 | de.de_gen_number_bit_string = NULL; | |
1009 | if ((retval = | |
1010 | reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, | |
1011 | &path, &de)) == NAME_NOT_FOUND) { | |
1012 | retval = -ENOENT; | |
1013 | goto end_unlink; | |
1014 | } else if (retval == IO_ERROR) { | |
1015 | retval = -EIO; | |
1016 | goto end_unlink; | |
1017 | } | |
1018 | ||
1019 | reiserfs_update_inode_transaction(inode); | |
1020 | reiserfs_update_inode_transaction(dir); | |
1021 | ||
1022 | if (de.de_objectid != inode->i_ino) { | |
098297b2 JM |
1023 | /* |
1024 | * FIXME: compare key of an object and a key found in the entry | |
1025 | */ | |
bd4c625c LT |
1026 | retval = -EIO; |
1027 | goto end_unlink; | |
1028 | } | |
1029 | ||
1030 | if (!inode->i_nlink) { | |
45b03d5e JM |
1031 | reiserfs_warning(inode->i_sb, "reiserfs-7042", |
1032 | "deleting nonexistent file (%lu), %d", | |
1033 | inode->i_ino, inode->i_nlink); | |
bfe86848 | 1034 | set_nlink(inode, 1); |
bd4c625c LT |
1035 | } |
1036 | ||
9a53c3a7 | 1037 | drop_nlink(inode); |
bd4c625c LT |
1038 | |
1039 | /* | |
1040 | * we schedule before doing the add_save_link call, save the link | |
1041 | * count so we don't race | |
1042 | */ | |
1043 | savelink = inode->i_nlink; | |
1044 | ||
1045 | retval = | |
a228bf8f | 1046 | reiserfs_cut_from_item(&th, &path, &de.de_entry_key, dir, NULL, |
bd4c625c LT |
1047 | 0); |
1048 | if (retval < 0) { | |
d8c76e6f | 1049 | inc_nlink(inode); |
bd4c625c LT |
1050 | goto end_unlink; |
1051 | } | |
1052 | inode->i_ctime = CURRENT_TIME_SEC; | |
1053 | reiserfs_update_sd(&th, inode); | |
1054 | ||
1055 | dir->i_size -= (de.de_entrylen + DEH_SIZE); | |
1056 | dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC; | |
1057 | reiserfs_update_sd(&th, dir); | |
1058 | ||
1059 | if (!savelink) | |
1060 | /* prevent file from getting lost */ | |
1061 | add_save_link(&th, inode, 0 /* not truncate */ ); | |
1062 | ||
58d85426 | 1063 | retval = journal_end(&th); |
bd4c625c | 1064 | reiserfs_check_path(&path); |
278f6679 | 1065 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c LT |
1066 | return retval; |
1067 | ||
cf776a7a | 1068 | end_unlink: |
bd4c625c | 1069 | pathrelse(&path); |
58d85426 | 1070 | err = journal_end(&th); |
bd4c625c | 1071 | reiserfs_check_path(&path); |
1da177e4 | 1072 | if (err) |
bd4c625c | 1073 | retval = err; |
cf776a7a | 1074 | out_unlink: |
278f6679 | 1075 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c | 1076 | return retval; |
1da177e4 LT |
1077 | } |
1078 | ||
bd4c625c LT |
1079 | static int reiserfs_symlink(struct inode *parent_dir, |
1080 | struct dentry *dentry, const char *symname) | |
1da177e4 | 1081 | { |
bd4c625c LT |
1082 | int retval; |
1083 | struct inode *inode; | |
1084 | char *name; | |
1085 | int item_len; | |
1086 | struct reiserfs_transaction_handle th; | |
57fe60df | 1087 | struct reiserfs_security_handle security; |
bd4c625c | 1088 | int mode = S_IFLNK | S_IRWXUGO; |
098297b2 JM |
1089 | /* |
1090 | * We need blocks for transaction + (user+group)*(quotas for | |
1091 | * new inode + update of quota for directory owner) | |
1092 | */ | |
bd4c625c LT |
1093 | int jbegin_count = |
1094 | JOURNAL_PER_BALANCE_CNT * 3 + | |
1095 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(parent_dir->i_sb) + | |
1096 | REISERFS_QUOTA_TRANS_BLOCKS(parent_dir->i_sb)); | |
1097 | ||
871a2931 | 1098 | dquot_initialize(parent_dir); |
907f4554 | 1099 | |
bd4c625c LT |
1100 | if (!(inode = new_inode(parent_dir->i_sb))) { |
1101 | return -ENOMEM; | |
1102 | } | |
1103 | new_inode_init(inode, parent_dir, mode); | |
1104 | ||
2a7dba39 EP |
1105 | retval = reiserfs_security_init(parent_dir, inode, &dentry->d_name, |
1106 | &security); | |
57fe60df JM |
1107 | if (retval < 0) { |
1108 | drop_new_inode(inode); | |
1109 | return retval; | |
1110 | } | |
1111 | jbegin_count += retval; | |
1112 | ||
bd4c625c LT |
1113 | reiserfs_write_lock(parent_dir->i_sb); |
1114 | item_len = ROUND_UP(strlen(symname)); | |
1115 | if (item_len > MAX_DIRECT_ITEM_LEN(parent_dir->i_sb->s_blocksize)) { | |
1116 | retval = -ENAMETOOLONG; | |
1117 | drop_new_inode(inode); | |
1118 | goto out_failed; | |
1119 | } | |
1120 | ||
d739b42b | 1121 | name = kmalloc(item_len, GFP_NOFS); |
bd4c625c LT |
1122 | if (!name) { |
1123 | drop_new_inode(inode); | |
1124 | retval = -ENOMEM; | |
1125 | goto out_failed; | |
1126 | } | |
1127 | memcpy(name, symname, strlen(symname)); | |
1128 | padd_item(name, item_len, strlen(symname)); | |
1129 | ||
bd4c625c LT |
1130 | retval = journal_begin(&th, parent_dir->i_sb, jbegin_count); |
1131 | if (retval) { | |
1132 | drop_new_inode(inode); | |
d739b42b | 1133 | kfree(name); |
bd4c625c LT |
1134 | goto out_failed; |
1135 | } | |
1136 | ||
1137 | retval = | |
1138 | reiserfs_new_inode(&th, parent_dir, mode, name, strlen(symname), | |
57fe60df | 1139 | dentry, inode, &security); |
d739b42b | 1140 | kfree(name); |
bd4c625c LT |
1141 | if (retval) { /* reiserfs_new_inode iputs for us */ |
1142 | goto out_failed; | |
1143 | } | |
1da177e4 | 1144 | |
bd4c625c LT |
1145 | reiserfs_update_inode_transaction(inode); |
1146 | reiserfs_update_inode_transaction(parent_dir); | |
1147 | ||
1148 | inode->i_op = &reiserfs_symlink_inode_operations; | |
1149 | inode->i_mapping->a_ops = &reiserfs_address_space_operations; | |
1150 | ||
bd4c625c LT |
1151 | retval = reiserfs_add_entry(&th, parent_dir, dentry->d_name.name, |
1152 | dentry->d_name.len, inode, 1 /*visible */ ); | |
1153 | if (retval) { | |
1154 | int err; | |
6d6b77f1 | 1155 | drop_nlink(inode); |
bd4c625c | 1156 | reiserfs_update_sd(&th, inode); |
58d85426 | 1157 | err = journal_end(&th); |
bd4c625c LT |
1158 | if (err) |
1159 | retval = err; | |
c1eaa26b | 1160 | unlock_new_inode(inode); |
bd4c625c LT |
1161 | iput(inode); |
1162 | goto out_failed; | |
1163 | } | |
1da177e4 | 1164 | |
c1eaa26b | 1165 | unlock_new_inode(inode); |
8fc37ec5 | 1166 | d_instantiate(dentry, inode); |
58d85426 | 1167 | retval = journal_end(&th); |
cf776a7a | 1168 | out_failed: |
bd4c625c LT |
1169 | reiserfs_write_unlock(parent_dir->i_sb); |
1170 | return retval; | |
1da177e4 LT |
1171 | } |
1172 | ||
bd4c625c LT |
1173 | static int reiserfs_link(struct dentry *old_dentry, struct inode *dir, |
1174 | struct dentry *dentry) | |
1175 | { | |
1176 | int retval; | |
1177 | struct inode *inode = old_dentry->d_inode; | |
1178 | struct reiserfs_transaction_handle th; | |
098297b2 JM |
1179 | /* |
1180 | * We need blocks for transaction + update of quotas for | |
1181 | * the owners of the directory | |
1182 | */ | |
bd4c625c LT |
1183 | int jbegin_count = |
1184 | JOURNAL_PER_BALANCE_CNT * 3 + | |
1185 | 2 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
1186 | ||
871a2931 | 1187 | dquot_initialize(dir); |
907f4554 | 1188 | |
bd4c625c LT |
1189 | reiserfs_write_lock(dir->i_sb); |
1190 | if (inode->i_nlink >= REISERFS_LINK_MAX) { | |
098297b2 | 1191 | /* FIXME: sd_nlink is 32 bit for new files */ |
bd4c625c LT |
1192 | reiserfs_write_unlock(dir->i_sb); |
1193 | return -EMLINK; | |
1194 | } | |
bd4c625c LT |
1195 | |
1196 | /* inc before scheduling so reiserfs_unlink knows we are here */ | |
d8c76e6f | 1197 | inc_nlink(inode); |
bd4c625c LT |
1198 | |
1199 | retval = journal_begin(&th, dir->i_sb, jbegin_count); | |
1200 | if (retval) { | |
6d6b77f1 | 1201 | drop_nlink(inode); |
bd4c625c LT |
1202 | reiserfs_write_unlock(dir->i_sb); |
1203 | return retval; | |
1204 | } | |
1205 | ||
1206 | /* create new entry */ | |
1207 | retval = | |
1208 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
1209 | dentry->d_name.len, inode, 1 /*visible */ ); | |
1210 | ||
1211 | reiserfs_update_inode_transaction(inode); | |
1212 | reiserfs_update_inode_transaction(dir); | |
1213 | ||
1214 | if (retval) { | |
1215 | int err; | |
6d6b77f1 | 1216 | drop_nlink(inode); |
58d85426 | 1217 | err = journal_end(&th); |
bd4c625c LT |
1218 | reiserfs_write_unlock(dir->i_sb); |
1219 | return err ? err : retval; | |
1220 | } | |
1221 | ||
1222 | inode->i_ctime = CURRENT_TIME_SEC; | |
1223 | reiserfs_update_sd(&th, inode); | |
1224 | ||
7de9c6ee | 1225 | ihold(inode); |
bd4c625c | 1226 | d_instantiate(dentry, inode); |
58d85426 | 1227 | retval = journal_end(&th); |
bd4c625c LT |
1228 | reiserfs_write_unlock(dir->i_sb); |
1229 | return retval; | |
1230 | } | |
1da177e4 | 1231 | |
0222e657 | 1232 | /* de contains information pointing to an entry which */ |
bd4c625c LT |
1233 | static int de_still_valid(const char *name, int len, |
1234 | struct reiserfs_dir_entry *de) | |
1da177e4 | 1235 | { |
bd4c625c LT |
1236 | struct reiserfs_dir_entry tmp = *de; |
1237 | ||
098297b2 | 1238 | /* recalculate pointer to name and name length */ |
bd4c625c | 1239 | set_de_name_and_namelen(&tmp); |
098297b2 | 1240 | /* FIXME: could check more */ |
bd4c625c LT |
1241 | if (tmp.de_namelen != len || memcmp(name, de->de_name, len)) |
1242 | return 0; | |
1243 | return 1; | |
1da177e4 LT |
1244 | } |
1245 | ||
bd4c625c LT |
1246 | static int entry_points_to_object(const char *name, int len, |
1247 | struct reiserfs_dir_entry *de, | |
1248 | struct inode *inode) | |
1da177e4 | 1249 | { |
bd4c625c LT |
1250 | if (!de_still_valid(name, len, de)) |
1251 | return 0; | |
1252 | ||
1253 | if (inode) { | |
1254 | if (!de_visible(de->de_deh + de->de_entry_num)) | |
c3a9c210 JM |
1255 | reiserfs_panic(inode->i_sb, "vs-7042", |
1256 | "entry must be visible"); | |
bd4c625c LT |
1257 | return (de->de_objectid == inode->i_ino) ? 1 : 0; |
1258 | } | |
1da177e4 | 1259 | |
bd4c625c LT |
1260 | /* this must be added hidden entry */ |
1261 | if (de_visible(de->de_deh + de->de_entry_num)) | |
c3a9c210 | 1262 | reiserfs_panic(NULL, "vs-7043", "entry must be visible"); |
1da177e4 | 1263 | |
bd4c625c | 1264 | return 1; |
1da177e4 LT |
1265 | } |
1266 | ||
1da177e4 | 1267 | /* sets key of objectid the entry has to point to */ |
bd4c625c LT |
1268 | static void set_ino_in_dir_entry(struct reiserfs_dir_entry *de, |
1269 | struct reiserfs_key *key) | |
1da177e4 | 1270 | { |
bd4c625c LT |
1271 | /* JDM These operations are endian safe - both are le */ |
1272 | de->de_deh[de->de_entry_num].deh_dir_id = key->k_dir_id; | |
1273 | de->de_deh[de->de_entry_num].deh_objectid = key->k_objectid; | |
1da177e4 LT |
1274 | } |
1275 | ||
0222e657 | 1276 | /* |
1da177e4 LT |
1277 | * process, that is going to call fix_nodes/do_balance must hold only |
1278 | * one path. If it holds 2 or more, it can get into endless waiting in | |
0222e657 | 1279 | * get_empty_nodes or its clones |
1da177e4 | 1280 | */ |
bd4c625c LT |
1281 | static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
1282 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1283 | { |
bd4c625c LT |
1284 | int retval; |
1285 | INITIALIZE_PATH(old_entry_path); | |
1286 | INITIALIZE_PATH(new_entry_path); | |
1287 | INITIALIZE_PATH(dot_dot_entry_path); | |
1288 | struct item_head new_entry_ih, old_entry_ih, dot_dot_ih; | |
1289 | struct reiserfs_dir_entry old_de, new_de, dot_dot_de; | |
1290 | struct inode *old_inode, *new_dentry_inode; | |
1291 | struct reiserfs_transaction_handle th; | |
1292 | int jbegin_count; | |
1293 | umode_t old_inode_mode; | |
1294 | unsigned long savelink = 1; | |
1295 | struct timespec ctime; | |
1296 | ||
098297b2 JM |
1297 | /* |
1298 | * three balancings: (1) old name removal, (2) new name insertion | |
1299 | * and (3) maybe "save" link insertion | |
1300 | * stat data updates: (1) old directory, | |
1301 | * (2) new directory and (3) maybe old object stat data (when it is | |
1302 | * directory) and (4) maybe stat data of object to which new entry | |
1303 | * pointed initially and (5) maybe block containing ".." of | |
1304 | * renamed directory | |
1305 | * quota updates: two parent directories | |
1306 | */ | |
bd4c625c LT |
1307 | jbegin_count = |
1308 | JOURNAL_PER_BALANCE_CNT * 3 + 5 + | |
1309 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(old_dir->i_sb); | |
1310 | ||
871a2931 CH |
1311 | dquot_initialize(old_dir); |
1312 | dquot_initialize(new_dir); | |
907f4554 | 1313 | |
bd4c625c LT |
1314 | old_inode = old_dentry->d_inode; |
1315 | new_dentry_inode = new_dentry->d_inode; | |
1316 | ||
098297b2 JM |
1317 | /* |
1318 | * make sure that oldname still exists and points to an object we | |
1319 | * are going to rename | |
1320 | */ | |
bd4c625c LT |
1321 | old_de.de_gen_number_bit_string = NULL; |
1322 | reiserfs_write_lock(old_dir->i_sb); | |
1323 | retval = | |
1324 | reiserfs_find_entry(old_dir, old_dentry->d_name.name, | |
1325 | old_dentry->d_name.len, &old_entry_path, | |
1326 | &old_de); | |
1327 | pathrelse(&old_entry_path); | |
1328 | if (retval == IO_ERROR) { | |
1da177e4 | 1329 | reiserfs_write_unlock(old_dir->i_sb); |
bd4c625c | 1330 | return -EIO; |
1da177e4 | 1331 | } |
bd4c625c LT |
1332 | |
1333 | if (retval != NAME_FOUND || old_de.de_objectid != old_inode->i_ino) { | |
1334 | reiserfs_write_unlock(old_dir->i_sb); | |
1335 | return -ENOENT; | |
1da177e4 LT |
1336 | } |
1337 | ||
bd4c625c LT |
1338 | old_inode_mode = old_inode->i_mode; |
1339 | if (S_ISDIR(old_inode_mode)) { | |
098297b2 JM |
1340 | /* |
1341 | * make sure that directory being renamed has correct ".." | |
1342 | * and that its new parent directory has not too many links | |
1343 | * already | |
1344 | */ | |
bd4c625c LT |
1345 | if (new_dentry_inode) { |
1346 | if (!reiserfs_empty_dir(new_dentry_inode)) { | |
1347 | reiserfs_write_unlock(old_dir->i_sb); | |
1348 | return -ENOTEMPTY; | |
1349 | } | |
1350 | } | |
1351 | ||
098297b2 JM |
1352 | /* |
1353 | * directory is renamed, its parent directory will be changed, | |
1354 | * so find ".." entry | |
bd4c625c LT |
1355 | */ |
1356 | dot_dot_de.de_gen_number_bit_string = NULL; | |
1357 | retval = | |
1358 | reiserfs_find_entry(old_inode, "..", 2, &dot_dot_entry_path, | |
1359 | &dot_dot_de); | |
1360 | pathrelse(&dot_dot_entry_path); | |
1361 | if (retval != NAME_FOUND) { | |
1362 | reiserfs_write_unlock(old_dir->i_sb); | |
1363 | return -EIO; | |
1364 | } | |
1365 | ||
1366 | /* inode number of .. must equal old_dir->i_ino */ | |
1367 | if (dot_dot_de.de_objectid != old_dir->i_ino) { | |
1368 | reiserfs_write_unlock(old_dir->i_sb); | |
1369 | return -EIO; | |
1370 | } | |
1da177e4 | 1371 | } |
bd4c625c LT |
1372 | |
1373 | retval = journal_begin(&th, old_dir->i_sb, jbegin_count); | |
1374 | if (retval) { | |
1375 | reiserfs_write_unlock(old_dir->i_sb); | |
1376 | return retval; | |
1da177e4 | 1377 | } |
bd4c625c LT |
1378 | |
1379 | /* add new entry (or find the existing one) */ | |
1380 | retval = | |
1381 | reiserfs_add_entry(&th, new_dir, new_dentry->d_name.name, | |
1382 | new_dentry->d_name.len, old_inode, 0); | |
1383 | if (retval == -EEXIST) { | |
1384 | if (!new_dentry_inode) { | |
c3a9c210 JM |
1385 | reiserfs_panic(old_dir->i_sb, "vs-7050", |
1386 | "new entry is found, new inode == 0"); | |
bd4c625c LT |
1387 | } |
1388 | } else if (retval) { | |
58d85426 | 1389 | int err = journal_end(&th); |
bd4c625c LT |
1390 | reiserfs_write_unlock(old_dir->i_sb); |
1391 | return err ? err : retval; | |
1da177e4 LT |
1392 | } |
1393 | ||
bd4c625c LT |
1394 | reiserfs_update_inode_transaction(old_dir); |
1395 | reiserfs_update_inode_transaction(new_dir); | |
1396 | ||
098297b2 JM |
1397 | /* |
1398 | * this makes it so an fsync on an open fd for the old name will | |
1399 | * commit the rename operation | |
bd4c625c LT |
1400 | */ |
1401 | reiserfs_update_inode_transaction(old_inode); | |
1402 | ||
1403 | if (new_dentry_inode) | |
1404 | reiserfs_update_inode_transaction(new_dentry_inode); | |
1405 | ||
1406 | while (1) { | |
098297b2 JM |
1407 | /* |
1408 | * look for old name using corresponding entry key | |
1409 | * (found by reiserfs_find_entry) | |
1410 | */ | |
bd4c625c LT |
1411 | if ((retval = |
1412 | search_by_entry_key(new_dir->i_sb, &old_de.de_entry_key, | |
1413 | &old_entry_path, | |
1414 | &old_de)) != NAME_FOUND) { | |
1415 | pathrelse(&old_entry_path); | |
58d85426 | 1416 | journal_end(&th); |
bd4c625c LT |
1417 | reiserfs_write_unlock(old_dir->i_sb); |
1418 | return -EIO; | |
1419 | } | |
1420 | ||
4cf5f7ad | 1421 | copy_item_head(&old_entry_ih, tp_item_head(&old_entry_path)); |
bd4c625c LT |
1422 | |
1423 | reiserfs_prepare_for_journal(old_inode->i_sb, old_de.de_bh, 1); | |
1424 | ||
098297b2 | 1425 | /* look for new name by reiserfs_find_entry */ |
bd4c625c LT |
1426 | new_de.de_gen_number_bit_string = NULL; |
1427 | retval = | |
1428 | reiserfs_find_entry(new_dir, new_dentry->d_name.name, | |
1429 | new_dentry->d_name.len, &new_entry_path, | |
1430 | &new_de); | |
098297b2 JM |
1431 | /* |
1432 | * reiserfs_add_entry should not return IO_ERROR, | |
1433 | * because it is called with essentially same parameters from | |
1434 | * reiserfs_add_entry above, and we'll catch any i/o errors | |
1435 | * before we get here. | |
1436 | */ | |
bd4c625c LT |
1437 | if (retval != NAME_FOUND_INVISIBLE && retval != NAME_FOUND) { |
1438 | pathrelse(&new_entry_path); | |
1439 | pathrelse(&old_entry_path); | |
58d85426 | 1440 | journal_end(&th); |
bd4c625c LT |
1441 | reiserfs_write_unlock(old_dir->i_sb); |
1442 | return -EIO; | |
1443 | } | |
1444 | ||
4cf5f7ad | 1445 | copy_item_head(&new_entry_ih, tp_item_head(&new_entry_path)); |
bd4c625c LT |
1446 | |
1447 | reiserfs_prepare_for_journal(old_inode->i_sb, new_de.de_bh, 1); | |
1448 | ||
1449 | if (S_ISDIR(old_inode->i_mode)) { | |
1450 | if ((retval = | |
1451 | search_by_entry_key(new_dir->i_sb, | |
1452 | &dot_dot_de.de_entry_key, | |
1453 | &dot_dot_entry_path, | |
1454 | &dot_dot_de)) != NAME_FOUND) { | |
1455 | pathrelse(&dot_dot_entry_path); | |
1456 | pathrelse(&new_entry_path); | |
1457 | pathrelse(&old_entry_path); | |
58d85426 | 1458 | journal_end(&th); |
bd4c625c LT |
1459 | reiserfs_write_unlock(old_dir->i_sb); |
1460 | return -EIO; | |
1461 | } | |
1462 | copy_item_head(&dot_dot_ih, | |
4cf5f7ad | 1463 | tp_item_head(&dot_dot_entry_path)); |
098297b2 | 1464 | /* node containing ".." gets into transaction */ |
bd4c625c LT |
1465 | reiserfs_prepare_for_journal(old_inode->i_sb, |
1466 | dot_dot_de.de_bh, 1); | |
1467 | } | |
098297b2 JM |
1468 | /* |
1469 | * we should check seals here, not do | |
1470 | * this stuff, yes? Then, having | |
1471 | * gathered everything into RAM we | |
1472 | * should lock the buffers, yes? -Hans | |
1473 | */ | |
1474 | /* | |
1475 | * probably. our rename needs to hold more | |
1476 | * than one path at once. The seals would | |
1477 | * have to be written to deal with multi-path | |
1478 | * issues -chris | |
bd4c625c | 1479 | */ |
098297b2 JM |
1480 | /* |
1481 | * sanity checking before doing the rename - avoid races many | |
1482 | * of the above checks could have scheduled. We have to be | |
1483 | * sure our items haven't been shifted by another process. | |
bd4c625c LT |
1484 | */ |
1485 | if (item_moved(&new_entry_ih, &new_entry_path) || | |
1486 | !entry_points_to_object(new_dentry->d_name.name, | |
1487 | new_dentry->d_name.len, | |
1488 | &new_de, new_dentry_inode) || | |
1489 | item_moved(&old_entry_ih, &old_entry_path) || | |
1490 | !entry_points_to_object(old_dentry->d_name.name, | |
1491 | old_dentry->d_name.len, | |
1492 | &old_de, old_inode)) { | |
1493 | reiserfs_restore_prepared_buffer(old_inode->i_sb, | |
1494 | new_de.de_bh); | |
1495 | reiserfs_restore_prepared_buffer(old_inode->i_sb, | |
1496 | old_de.de_bh); | |
1497 | if (S_ISDIR(old_inode_mode)) | |
1498 | reiserfs_restore_prepared_buffer(old_inode-> | |
1499 | i_sb, | |
1500 | dot_dot_de. | |
1501 | de_bh); | |
1502 | continue; | |
1503 | } | |
1504 | if (S_ISDIR(old_inode_mode)) { | |
1505 | if (item_moved(&dot_dot_ih, &dot_dot_entry_path) || | |
1506 | !entry_points_to_object("..", 2, &dot_dot_de, | |
1507 | old_dir)) { | |
1508 | reiserfs_restore_prepared_buffer(old_inode-> | |
1509 | i_sb, | |
1510 | old_de.de_bh); | |
1511 | reiserfs_restore_prepared_buffer(old_inode-> | |
1512 | i_sb, | |
1513 | new_de.de_bh); | |
1514 | reiserfs_restore_prepared_buffer(old_inode-> | |
1515 | i_sb, | |
1516 | dot_dot_de. | |
1517 | de_bh); | |
1518 | continue; | |
1519 | } | |
1520 | } | |
1521 | ||
1522 | RFALSE(S_ISDIR(old_inode_mode) && | |
1523 | !buffer_journal_prepared(dot_dot_de.de_bh), ""); | |
1524 | ||
1525 | break; | |
1da177e4 LT |
1526 | } |
1527 | ||
098297b2 JM |
1528 | /* |
1529 | * ok, all the changes can be done in one fell swoop when we | |
1530 | * have claimed all the buffers needed. | |
1531 | */ | |
1da177e4 | 1532 | |
bd4c625c LT |
1533 | mark_de_visible(new_de.de_deh + new_de.de_entry_num); |
1534 | set_ino_in_dir_entry(&new_de, INODE_PKEY(old_inode)); | |
09f1b80b | 1535 | journal_mark_dirty(&th, new_de.de_bh); |
1da177e4 | 1536 | |
bd4c625c | 1537 | mark_de_hidden(old_de.de_deh + old_de.de_entry_num); |
09f1b80b | 1538 | journal_mark_dirty(&th, old_de.de_bh); |
bd4c625c LT |
1539 | ctime = CURRENT_TIME_SEC; |
1540 | old_dir->i_ctime = old_dir->i_mtime = ctime; | |
1541 | new_dir->i_ctime = new_dir->i_mtime = ctime; | |
098297b2 JM |
1542 | /* |
1543 | * thanks to Alex Adriaanse <alex_a@caltech.edu> for patch | |
1544 | * which adds ctime update of renamed object | |
1545 | */ | |
bd4c625c LT |
1546 | old_inode->i_ctime = ctime; |
1547 | ||
1548 | if (new_dentry_inode) { | |
098297b2 | 1549 | /* adjust link number of the victim */ |
bd4c625c | 1550 | if (S_ISDIR(new_dentry_inode->i_mode)) { |
ce71ec36 | 1551 | clear_nlink(new_dentry_inode); |
bd4c625c | 1552 | } else { |
9a53c3a7 | 1553 | drop_nlink(new_dentry_inode); |
bd4c625c LT |
1554 | } |
1555 | new_dentry_inode->i_ctime = ctime; | |
1556 | savelink = new_dentry_inode->i_nlink; | |
1da177e4 | 1557 | } |
bd4c625c | 1558 | |
1da177e4 | 1559 | if (S_ISDIR(old_inode_mode)) { |
0222e657 | 1560 | /* adjust ".." of renamed directory */ |
bd4c625c | 1561 | set_ino_in_dir_entry(&dot_dot_de, INODE_PKEY(new_dir)); |
09f1b80b | 1562 | journal_mark_dirty(&th, dot_dot_de.de_bh); |
bd4c625c | 1563 | |
098297b2 JM |
1564 | /* |
1565 | * there (in new_dir) was no directory, so it got new link | |
1566 | * (".." of renamed directory) | |
1567 | */ | |
bd4c625c | 1568 | if (!new_dentry_inode) |
bd4c625c LT |
1569 | INC_DIR_INODE_NLINK(new_dir); |
1570 | ||
1571 | /* old directory lost one link - ".. " of renamed directory */ | |
1572 | DEC_DIR_INODE_NLINK(old_dir); | |
1da177e4 | 1573 | } |
098297b2 JM |
1574 | /* |
1575 | * looks like in 2.3.99pre3 brelse is atomic. | |
1576 | * so we can use pathrelse | |
1577 | */ | |
bd4c625c LT |
1578 | pathrelse(&new_entry_path); |
1579 | pathrelse(&dot_dot_entry_path); | |
1da177e4 | 1580 | |
098297b2 JM |
1581 | /* |
1582 | * FIXME: this reiserfs_cut_from_item's return value may screw up | |
1583 | * anybody, but it will panic if will not be able to find the | |
1584 | * entry. This needs one more clean up | |
1585 | */ | |
bd4c625c | 1586 | if (reiserfs_cut_from_item |
a228bf8f | 1587 | (&th, &old_entry_path, &old_de.de_entry_key, old_dir, NULL, |
bd4c625c | 1588 | 0) < 0) |
0030b645 JM |
1589 | reiserfs_error(old_dir->i_sb, "vs-7060", |
1590 | "couldn't not cut old name. Fsck later?"); | |
bd4c625c LT |
1591 | |
1592 | old_dir->i_size -= DEH_SIZE + old_de.de_entrylen; | |
1593 | ||
1594 | reiserfs_update_sd(&th, old_dir); | |
1595 | reiserfs_update_sd(&th, new_dir); | |
1596 | reiserfs_update_sd(&th, old_inode); | |
1597 | ||
1598 | if (new_dentry_inode) { | |
1599 | if (savelink == 0) | |
1600 | add_save_link(&th, new_dentry_inode, | |
1601 | 0 /* not truncate */ ); | |
1602 | reiserfs_update_sd(&th, new_dentry_inode); | |
1da177e4 | 1603 | } |
bd4c625c | 1604 | |
58d85426 | 1605 | retval = journal_end(&th); |
bd4c625c LT |
1606 | reiserfs_write_unlock(old_dir->i_sb); |
1607 | return retval; | |
1da177e4 LT |
1608 | } |
1609 | ||
098297b2 | 1610 | /* directories can handle most operations... */ |
c5ef1c42 | 1611 | const struct inode_operations reiserfs_dir_inode_operations = { |
bd4c625c LT |
1612 | .create = reiserfs_create, |
1613 | .lookup = reiserfs_lookup, | |
1614 | .link = reiserfs_link, | |
1615 | .unlink = reiserfs_unlink, | |
1616 | .symlink = reiserfs_symlink, | |
1617 | .mkdir = reiserfs_mkdir, | |
1618 | .rmdir = reiserfs_rmdir, | |
1619 | .mknod = reiserfs_mknod, | |
1620 | .rename = reiserfs_rename, | |
1621 | .setattr = reiserfs_setattr, | |
1622 | .setxattr = reiserfs_setxattr, | |
1623 | .getxattr = reiserfs_getxattr, | |
1624 | .listxattr = reiserfs_listxattr, | |
1625 | .removexattr = reiserfs_removexattr, | |
1626 | .permission = reiserfs_permission, | |
4e34e719 | 1627 | .get_acl = reiserfs_get_acl, |
47f70d08 | 1628 | .set_acl = reiserfs_set_acl, |
1da177e4 LT |
1629 | }; |
1630 | ||
1631 | /* | |
1632 | * symlink operations.. same as page_symlink_inode_operations, with xattr | |
1633 | * stuff added | |
1634 | */ | |
c5ef1c42 | 1635 | const struct inode_operations reiserfs_symlink_inode_operations = { |
bd4c625c LT |
1636 | .readlink = generic_readlink, |
1637 | .follow_link = page_follow_link_light, | |
1638 | .put_link = page_put_link, | |
1639 | .setattr = reiserfs_setattr, | |
1640 | .setxattr = reiserfs_setxattr, | |
1641 | .getxattr = reiserfs_getxattr, | |
1642 | .listxattr = reiserfs_listxattr, | |
1643 | .removexattr = reiserfs_removexattr, | |
1644 | .permission = reiserfs_permission, | |
1da177e4 LT |
1645 | }; |
1646 | ||
1da177e4 LT |
1647 | /* |
1648 | * special file operations.. just xattr/acl stuff | |
1649 | */ | |
c5ef1c42 | 1650 | const struct inode_operations reiserfs_special_inode_operations = { |
bd4c625c LT |
1651 | .setattr = reiserfs_setattr, |
1652 | .setxattr = reiserfs_setxattr, | |
1653 | .getxattr = reiserfs_getxattr, | |
1654 | .listxattr = reiserfs_listxattr, | |
1655 | .removexattr = reiserfs_removexattr, | |
1656 | .permission = reiserfs_permission, | |
4e34e719 | 1657 | .get_acl = reiserfs_get_acl, |
47f70d08 | 1658 | .set_acl = reiserfs_set_acl, |
1da177e4 | 1659 | }; |