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); | |
2b0143b5 | 403 | struct inode *dir = d_inode(child); |
bd4c625c LT |
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); | |
2e6c97ea | 616 | return dquot_initialize(inode); |
1da177e4 LT |
617 | } |
618 | ||
4acdaf27 | 619 | static int reiserfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 620 | bool excl) |
1da177e4 | 621 | { |
bd4c625c LT |
622 | int retval; |
623 | struct inode *inode; | |
098297b2 JM |
624 | /* |
625 | * We need blocks for transaction + (user+group)*(quotas | |
626 | * for new inode + update of quota for directory owner) | |
627 | */ | |
bd4c625c LT |
628 | int jbegin_count = |
629 | JOURNAL_PER_BALANCE_CNT * 2 + | |
630 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
631 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
632 | struct reiserfs_transaction_handle th; | |
57fe60df | 633 | struct reiserfs_security_handle security; |
bd4c625c | 634 | |
2e6c97ea JK |
635 | retval = dquot_initialize(dir); |
636 | if (retval) | |
637 | return retval; | |
907f4554 | 638 | |
bd4c625c LT |
639 | if (!(inode = new_inode(dir->i_sb))) { |
640 | return -ENOMEM; | |
641 | } | |
2e6c97ea JK |
642 | retval = new_inode_init(inode, dir, mode); |
643 | if (retval) { | |
644 | drop_new_inode(inode); | |
645 | return retval; | |
646 | } | |
1da177e4 | 647 | |
0ab2621e | 648 | jbegin_count += reiserfs_cache_default_acl(dir); |
2a7dba39 | 649 | retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); |
57fe60df JM |
650 | if (retval < 0) { |
651 | drop_new_inode(inode); | |
652 | return retval; | |
653 | } | |
654 | jbegin_count += retval; | |
bd4c625c | 655 | reiserfs_write_lock(dir->i_sb); |
1da177e4 | 656 | |
bd4c625c LT |
657 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
658 | if (retval) { | |
659 | drop_new_inode(inode); | |
660 | goto out_failed; | |
661 | } | |
662 | ||
663 | retval = | |
664 | reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry, | |
57fe60df | 665 | inode, &security); |
bd4c625c LT |
666 | if (retval) |
667 | goto out_failed; | |
668 | ||
bd4c625c LT |
669 | inode->i_op = &reiserfs_file_inode_operations; |
670 | inode->i_fop = &reiserfs_file_operations; | |
671 | inode->i_mapping->a_ops = &reiserfs_address_space_operations; | |
672 | ||
673 | retval = | |
674 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
675 | dentry->d_name.len, inode, 1 /*visible */ ); | |
676 | if (retval) { | |
677 | int err; | |
6d6b77f1 | 678 | drop_nlink(inode); |
bd4c625c | 679 | reiserfs_update_sd(&th, inode); |
58d85426 | 680 | err = journal_end(&th); |
bd4c625c LT |
681 | if (err) |
682 | retval = err; | |
c1eaa26b | 683 | unlock_new_inode(inode); |
bd4c625c LT |
684 | iput(inode); |
685 | goto out_failed; | |
686 | } | |
687 | reiserfs_update_inode_transaction(inode); | |
688 | reiserfs_update_inode_transaction(dir); | |
1da177e4 | 689 | |
c1eaa26b | 690 | unlock_new_inode(inode); |
8fc37ec5 | 691 | d_instantiate(dentry, inode); |
58d85426 | 692 | retval = journal_end(&th); |
1da177e4 | 693 | |
cf776a7a | 694 | out_failed: |
bd4c625c LT |
695 | reiserfs_write_unlock(dir->i_sb); |
696 | return retval; | |
697 | } | |
1da177e4 | 698 | |
1a67aafb | 699 | static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
bd4c625c LT |
700 | dev_t rdev) |
701 | { | |
702 | int retval; | |
703 | struct inode *inode; | |
704 | struct reiserfs_transaction_handle th; | |
57fe60df | 705 | struct reiserfs_security_handle security; |
098297b2 JM |
706 | /* |
707 | * We need blocks for transaction + (user+group)*(quotas | |
708 | * for new inode + update of quota for directory owner) | |
709 | */ | |
bd4c625c LT |
710 | int jbegin_count = |
711 | JOURNAL_PER_BALANCE_CNT * 3 + | |
712 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
713 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
bd4c625c LT |
714 | |
715 | if (!new_valid_dev(rdev)) | |
716 | return -EINVAL; | |
717 | ||
2e6c97ea JK |
718 | retval = dquot_initialize(dir); |
719 | if (retval) | |
720 | return retval; | |
907f4554 | 721 | |
bd4c625c LT |
722 | if (!(inode = new_inode(dir->i_sb))) { |
723 | return -ENOMEM; | |
724 | } | |
2e6c97ea JK |
725 | retval = new_inode_init(inode, dir, mode); |
726 | if (retval) { | |
727 | drop_new_inode(inode); | |
728 | return retval; | |
729 | } | |
1da177e4 | 730 | |
0ab2621e | 731 | jbegin_count += reiserfs_cache_default_acl(dir); |
2a7dba39 | 732 | retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); |
57fe60df JM |
733 | if (retval < 0) { |
734 | drop_new_inode(inode); | |
735 | return retval; | |
736 | } | |
737 | jbegin_count += retval; | |
bd4c625c | 738 | reiserfs_write_lock(dir->i_sb); |
1da177e4 | 739 | |
bd4c625c LT |
740 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
741 | if (retval) { | |
742 | drop_new_inode(inode); | |
743 | goto out_failed; | |
744 | } | |
1da177e4 | 745 | |
bd4c625c LT |
746 | retval = |
747 | reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry, | |
57fe60df | 748 | inode, &security); |
bd4c625c LT |
749 | if (retval) { |
750 | goto out_failed; | |
751 | } | |
1da177e4 | 752 | |
bd4c625c LT |
753 | inode->i_op = &reiserfs_special_inode_operations; |
754 | init_special_inode(inode, inode->i_mode, rdev); | |
755 | ||
098297b2 | 756 | /* FIXME: needed for block and char devices only */ |
bd4c625c LT |
757 | reiserfs_update_sd(&th, inode); |
758 | ||
759 | reiserfs_update_inode_transaction(inode); | |
760 | reiserfs_update_inode_transaction(dir); | |
761 | ||
762 | retval = | |
763 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
764 | dentry->d_name.len, inode, 1 /*visible */ ); | |
765 | if (retval) { | |
766 | int err; | |
6d6b77f1 | 767 | drop_nlink(inode); |
bd4c625c | 768 | reiserfs_update_sd(&th, inode); |
58d85426 | 769 | err = journal_end(&th); |
bd4c625c LT |
770 | if (err) |
771 | retval = err; | |
c1eaa26b | 772 | unlock_new_inode(inode); |
bd4c625c LT |
773 | iput(inode); |
774 | goto out_failed; | |
775 | } | |
1da177e4 | 776 | |
c1eaa26b | 777 | unlock_new_inode(inode); |
8fc37ec5 | 778 | d_instantiate(dentry, inode); |
58d85426 | 779 | retval = journal_end(&th); |
1da177e4 | 780 | |
cf776a7a | 781 | out_failed: |
bd4c625c LT |
782 | reiserfs_write_unlock(dir->i_sb); |
783 | return retval; | |
1da177e4 LT |
784 | } |
785 | ||
18bb1db3 | 786 | static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
1da177e4 | 787 | { |
bd4c625c LT |
788 | int retval; |
789 | struct inode *inode; | |
790 | struct reiserfs_transaction_handle th; | |
57fe60df | 791 | struct reiserfs_security_handle security; |
098297b2 JM |
792 | /* |
793 | * We need blocks for transaction + (user+group)*(quotas | |
794 | * for new inode + update of quota for directory owner) | |
795 | */ | |
bd4c625c LT |
796 | int jbegin_count = |
797 | JOURNAL_PER_BALANCE_CNT * 3 + | |
798 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
799 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
1da177e4 | 800 | |
2e6c97ea JK |
801 | retval = dquot_initialize(dir); |
802 | if (retval) | |
803 | return retval; | |
907f4554 | 804 | |
1da177e4 | 805 | #ifdef DISPLACE_NEW_PACKING_LOCALITIES |
098297b2 JM |
806 | /* |
807 | * set flag that new packing locality created and new blocks | |
808 | * for the content of that directory are not displaced yet | |
809 | */ | |
bd4c625c | 810 | REISERFS_I(dir)->new_packing_locality = 1; |
1da177e4 | 811 | #endif |
bd4c625c LT |
812 | mode = S_IFDIR | mode; |
813 | if (!(inode = new_inode(dir->i_sb))) { | |
814 | return -ENOMEM; | |
815 | } | |
2e6c97ea JK |
816 | retval = new_inode_init(inode, dir, mode); |
817 | if (retval) { | |
818 | drop_new_inode(inode); | |
819 | return retval; | |
820 | } | |
bd4c625c | 821 | |
0ab2621e | 822 | jbegin_count += reiserfs_cache_default_acl(dir); |
2a7dba39 | 823 | retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); |
57fe60df JM |
824 | if (retval < 0) { |
825 | drop_new_inode(inode); | |
826 | return retval; | |
827 | } | |
828 | jbegin_count += retval; | |
278f6679 | 829 | reiserfs_write_lock(dir->i_sb); |
bd4c625c LT |
830 | |
831 | retval = journal_begin(&th, dir->i_sb, jbegin_count); | |
832 | if (retval) { | |
833 | drop_new_inode(inode); | |
834 | goto out_failed; | |
835 | } | |
1da177e4 | 836 | |
098297b2 JM |
837 | /* |
838 | * inc the link count now, so another writer doesn't overflow | |
839 | * it while we sleep later on. | |
bd4c625c LT |
840 | */ |
841 | INC_DIR_INODE_NLINK(dir) | |
842 | ||
843 | retval = reiserfs_new_inode(&th, dir, mode, NULL /*symlink */ , | |
844 | old_format_only(dir->i_sb) ? | |
845 | EMPTY_DIR_SIZE_V1 : EMPTY_DIR_SIZE, | |
57fe60df | 846 | dentry, inode, &security); |
bd4c625c | 847 | if (retval) { |
99890a3b | 848 | DEC_DIR_INODE_NLINK(dir) |
bd4c625c LT |
849 | goto out_failed; |
850 | } | |
851 | ||
bd4c625c LT |
852 | reiserfs_update_inode_transaction(inode); |
853 | reiserfs_update_inode_transaction(dir); | |
854 | ||
855 | inode->i_op = &reiserfs_dir_inode_operations; | |
856 | inode->i_fop = &reiserfs_dir_operations; | |
857 | ||
098297b2 | 858 | /* note, _this_ add_entry will not update dir's stat data */ |
bd4c625c LT |
859 | retval = |
860 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
861 | dentry->d_name.len, inode, 1 /*visible */ ); | |
862 | if (retval) { | |
863 | int err; | |
6d6b77f1 | 864 | clear_nlink(inode); |
bd4c625c LT |
865 | DEC_DIR_INODE_NLINK(dir); |
866 | reiserfs_update_sd(&th, inode); | |
58d85426 | 867 | err = journal_end(&th); |
bd4c625c LT |
868 | if (err) |
869 | retval = err; | |
c1eaa26b | 870 | unlock_new_inode(inode); |
bd4c625c LT |
871 | iput(inode); |
872 | goto out_failed; | |
873 | } | |
098297b2 | 874 | /* the above add_entry did not update dir's stat data */ |
bd4c625c LT |
875 | reiserfs_update_sd(&th, dir); |
876 | ||
c1eaa26b | 877 | unlock_new_inode(inode); |
8fc37ec5 | 878 | d_instantiate(dentry, inode); |
58d85426 | 879 | retval = journal_end(&th); |
b10ab4c3 | 880 | out_failed: |
278f6679 | 881 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c | 882 | return retval; |
1da177e4 LT |
883 | } |
884 | ||
bd4c625c | 885 | static inline int reiserfs_empty_dir(struct inode *inode) |
1da177e4 | 886 | { |
098297b2 JM |
887 | /* |
888 | * we can cheat because an old format dir cannot have | |
889 | * EMPTY_DIR_SIZE, and a new format dir cannot have | |
890 | * EMPTY_DIR_SIZE_V1. So, if the inode is either size, | |
891 | * regardless of disk format version, the directory is empty. | |
bd4c625c LT |
892 | */ |
893 | if (inode->i_size != EMPTY_DIR_SIZE && | |
894 | inode->i_size != EMPTY_DIR_SIZE_V1) { | |
895 | return 0; | |
896 | } | |
897 | return 1; | |
1da177e4 LT |
898 | } |
899 | ||
bd4c625c | 900 | static int reiserfs_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 | 901 | { |
bd4c625c LT |
902 | int retval, err; |
903 | struct inode *inode; | |
904 | struct reiserfs_transaction_handle th; | |
905 | int jbegin_count; | |
906 | INITIALIZE_PATH(path); | |
907 | struct reiserfs_dir_entry de; | |
908 | ||
098297b2 JM |
909 | /* |
910 | * we will be doing 2 balancings and update 2 stat data, we | |
911 | * change quotas of the owner of the directory and of the owner | |
912 | * of the parent directory. The quota structure is possibly | |
913 | * deleted only on last iput => outside of this transaction | |
914 | */ | |
bd4c625c LT |
915 | jbegin_count = |
916 | JOURNAL_PER_BALANCE_CNT * 2 + 2 + | |
917 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
918 | ||
2e6c97ea JK |
919 | retval = dquot_initialize(dir); |
920 | if (retval) | |
921 | return retval; | |
907f4554 | 922 | |
bd4c625c LT |
923 | reiserfs_write_lock(dir->i_sb); |
924 | retval = journal_begin(&th, dir->i_sb, jbegin_count); | |
925 | if (retval) | |
926 | goto out_rmdir; | |
927 | ||
928 | de.de_gen_number_bit_string = NULL; | |
929 | if ((retval = | |
930 | reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, | |
931 | &path, &de)) == NAME_NOT_FOUND) { | |
932 | retval = -ENOENT; | |
933 | goto end_rmdir; | |
934 | } else if (retval == IO_ERROR) { | |
935 | retval = -EIO; | |
936 | goto end_rmdir; | |
937 | } | |
938 | ||
2b0143b5 | 939 | inode = d_inode(dentry); |
bd4c625c LT |
940 | |
941 | reiserfs_update_inode_transaction(inode); | |
942 | reiserfs_update_inode_transaction(dir); | |
943 | ||
944 | if (de.de_objectid != inode->i_ino) { | |
098297b2 JM |
945 | /* |
946 | * FIXME: compare key of an object and a key found in the entry | |
947 | */ | |
bd4c625c LT |
948 | retval = -EIO; |
949 | goto end_rmdir; | |
950 | } | |
951 | if (!reiserfs_empty_dir(inode)) { | |
952 | retval = -ENOTEMPTY; | |
953 | goto end_rmdir; | |
954 | } | |
955 | ||
956 | /* cut entry from dir directory */ | |
a228bf8f JM |
957 | retval = reiserfs_cut_from_item(&th, &path, &de.de_entry_key, |
958 | dir, NULL, /* page */ | |
bd4c625c LT |
959 | 0 /*new file size - not used here */ ); |
960 | if (retval < 0) | |
961 | goto end_rmdir; | |
962 | ||
963 | if (inode->i_nlink != 2 && inode->i_nlink != 1) | |
0030b645 JM |
964 | reiserfs_error(inode->i_sb, "reiserfs-7040", |
965 | "empty directory has nlink != 2 (%d)", | |
966 | inode->i_nlink); | |
bd4c625c | 967 | |
ce71ec36 | 968 | clear_nlink(inode); |
bd4c625c LT |
969 | inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC; |
970 | reiserfs_update_sd(&th, inode); | |
971 | ||
972 | DEC_DIR_INODE_NLINK(dir) | |
973 | dir->i_size -= (DEH_SIZE + de.de_entrylen); | |
974 | reiserfs_update_sd(&th, dir); | |
975 | ||
976 | /* prevent empty directory from getting lost */ | |
977 | add_save_link(&th, inode, 0 /* not truncate */ ); | |
978 | ||
58d85426 | 979 | retval = journal_end(&th); |
bd4c625c | 980 | reiserfs_check_path(&path); |
cf776a7a | 981 | out_rmdir: |
bd4c625c LT |
982 | reiserfs_write_unlock(dir->i_sb); |
983 | return retval; | |
984 | ||
cf776a7a | 985 | end_rmdir: |
098297b2 JM |
986 | /* |
987 | * we must release path, because we did not call | |
988 | * reiserfs_cut_from_item, or reiserfs_cut_from_item does not | |
989 | * release path if operation was not complete | |
990 | */ | |
bd4c625c | 991 | pathrelse(&path); |
58d85426 | 992 | err = journal_end(&th); |
bd4c625c LT |
993 | reiserfs_write_unlock(dir->i_sb); |
994 | return err ? err : retval; | |
1da177e4 LT |
995 | } |
996 | ||
bd4c625c | 997 | static int reiserfs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 | 998 | { |
bd4c625c LT |
999 | int retval, err; |
1000 | struct inode *inode; | |
1001 | struct reiserfs_dir_entry de; | |
1002 | INITIALIZE_PATH(path); | |
1003 | struct reiserfs_transaction_handle th; | |
1004 | int jbegin_count; | |
1005 | unsigned long savelink; | |
1006 | ||
2e6c97ea JK |
1007 | retval = dquot_initialize(dir); |
1008 | if (retval) | |
1009 | return retval; | |
907f4554 | 1010 | |
2b0143b5 | 1011 | inode = d_inode(dentry); |
bd4c625c | 1012 | |
098297b2 JM |
1013 | /* |
1014 | * in this transaction we can be doing at max two balancings and | |
1015 | * update two stat datas, we change quotas of the owner of the | |
1016 | * directory and of the owner of the parent directory. The quota | |
1017 | * structure is possibly deleted only on iput => outside of | |
1018 | * this transaction | |
1019 | */ | |
bd4c625c LT |
1020 | jbegin_count = |
1021 | JOURNAL_PER_BALANCE_CNT * 2 + 2 + | |
1022 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
1023 | ||
278f6679 | 1024 | reiserfs_write_lock(dir->i_sb); |
bd4c625c LT |
1025 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
1026 | if (retval) | |
1027 | goto out_unlink; | |
1028 | ||
1029 | de.de_gen_number_bit_string = NULL; | |
1030 | if ((retval = | |
1031 | reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, | |
1032 | &path, &de)) == NAME_NOT_FOUND) { | |
1033 | retval = -ENOENT; | |
1034 | goto end_unlink; | |
1035 | } else if (retval == IO_ERROR) { | |
1036 | retval = -EIO; | |
1037 | goto end_unlink; | |
1038 | } | |
1039 | ||
1040 | reiserfs_update_inode_transaction(inode); | |
1041 | reiserfs_update_inode_transaction(dir); | |
1042 | ||
1043 | if (de.de_objectid != inode->i_ino) { | |
098297b2 JM |
1044 | /* |
1045 | * FIXME: compare key of an object and a key found in the entry | |
1046 | */ | |
bd4c625c LT |
1047 | retval = -EIO; |
1048 | goto end_unlink; | |
1049 | } | |
1050 | ||
1051 | if (!inode->i_nlink) { | |
45b03d5e JM |
1052 | reiserfs_warning(inode->i_sb, "reiserfs-7042", |
1053 | "deleting nonexistent file (%lu), %d", | |
1054 | inode->i_ino, inode->i_nlink); | |
bfe86848 | 1055 | set_nlink(inode, 1); |
bd4c625c LT |
1056 | } |
1057 | ||
9a53c3a7 | 1058 | drop_nlink(inode); |
bd4c625c LT |
1059 | |
1060 | /* | |
1061 | * we schedule before doing the add_save_link call, save the link | |
1062 | * count so we don't race | |
1063 | */ | |
1064 | savelink = inode->i_nlink; | |
1065 | ||
1066 | retval = | |
a228bf8f | 1067 | reiserfs_cut_from_item(&th, &path, &de.de_entry_key, dir, NULL, |
bd4c625c LT |
1068 | 0); |
1069 | if (retval < 0) { | |
d8c76e6f | 1070 | inc_nlink(inode); |
bd4c625c LT |
1071 | goto end_unlink; |
1072 | } | |
1073 | inode->i_ctime = CURRENT_TIME_SEC; | |
1074 | reiserfs_update_sd(&th, inode); | |
1075 | ||
1076 | dir->i_size -= (de.de_entrylen + DEH_SIZE); | |
1077 | dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC; | |
1078 | reiserfs_update_sd(&th, dir); | |
1079 | ||
1080 | if (!savelink) | |
1081 | /* prevent file from getting lost */ | |
1082 | add_save_link(&th, inode, 0 /* not truncate */ ); | |
1083 | ||
58d85426 | 1084 | retval = journal_end(&th); |
bd4c625c | 1085 | reiserfs_check_path(&path); |
278f6679 | 1086 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c LT |
1087 | return retval; |
1088 | ||
cf776a7a | 1089 | end_unlink: |
bd4c625c | 1090 | pathrelse(&path); |
58d85426 | 1091 | err = journal_end(&th); |
bd4c625c | 1092 | reiserfs_check_path(&path); |
1da177e4 | 1093 | if (err) |
bd4c625c | 1094 | retval = err; |
cf776a7a | 1095 | out_unlink: |
278f6679 | 1096 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c | 1097 | return retval; |
1da177e4 LT |
1098 | } |
1099 | ||
bd4c625c LT |
1100 | static int reiserfs_symlink(struct inode *parent_dir, |
1101 | struct dentry *dentry, const char *symname) | |
1da177e4 | 1102 | { |
bd4c625c LT |
1103 | int retval; |
1104 | struct inode *inode; | |
1105 | char *name; | |
1106 | int item_len; | |
1107 | struct reiserfs_transaction_handle th; | |
57fe60df | 1108 | struct reiserfs_security_handle security; |
bd4c625c | 1109 | int mode = S_IFLNK | S_IRWXUGO; |
098297b2 JM |
1110 | /* |
1111 | * We need blocks for transaction + (user+group)*(quotas for | |
1112 | * new inode + update of quota for directory owner) | |
1113 | */ | |
bd4c625c LT |
1114 | int jbegin_count = |
1115 | JOURNAL_PER_BALANCE_CNT * 3 + | |
1116 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(parent_dir->i_sb) + | |
1117 | REISERFS_QUOTA_TRANS_BLOCKS(parent_dir->i_sb)); | |
1118 | ||
2e6c97ea JK |
1119 | retval = dquot_initialize(parent_dir); |
1120 | if (retval) | |
1121 | return retval; | |
907f4554 | 1122 | |
bd4c625c LT |
1123 | if (!(inode = new_inode(parent_dir->i_sb))) { |
1124 | return -ENOMEM; | |
1125 | } | |
2e6c97ea JK |
1126 | retval = new_inode_init(inode, parent_dir, mode); |
1127 | if (retval) { | |
1128 | drop_new_inode(inode); | |
1129 | return retval; | |
1130 | } | |
bd4c625c | 1131 | |
2a7dba39 EP |
1132 | retval = reiserfs_security_init(parent_dir, inode, &dentry->d_name, |
1133 | &security); | |
57fe60df JM |
1134 | if (retval < 0) { |
1135 | drop_new_inode(inode); | |
1136 | return retval; | |
1137 | } | |
1138 | jbegin_count += retval; | |
1139 | ||
bd4c625c LT |
1140 | reiserfs_write_lock(parent_dir->i_sb); |
1141 | item_len = ROUND_UP(strlen(symname)); | |
1142 | if (item_len > MAX_DIRECT_ITEM_LEN(parent_dir->i_sb->s_blocksize)) { | |
1143 | retval = -ENAMETOOLONG; | |
1144 | drop_new_inode(inode); | |
1145 | goto out_failed; | |
1146 | } | |
1147 | ||
d739b42b | 1148 | name = kmalloc(item_len, GFP_NOFS); |
bd4c625c LT |
1149 | if (!name) { |
1150 | drop_new_inode(inode); | |
1151 | retval = -ENOMEM; | |
1152 | goto out_failed; | |
1153 | } | |
1154 | memcpy(name, symname, strlen(symname)); | |
1155 | padd_item(name, item_len, strlen(symname)); | |
1156 | ||
bd4c625c LT |
1157 | retval = journal_begin(&th, parent_dir->i_sb, jbegin_count); |
1158 | if (retval) { | |
1159 | drop_new_inode(inode); | |
d739b42b | 1160 | kfree(name); |
bd4c625c LT |
1161 | goto out_failed; |
1162 | } | |
1163 | ||
1164 | retval = | |
1165 | reiserfs_new_inode(&th, parent_dir, mode, name, strlen(symname), | |
57fe60df | 1166 | dentry, inode, &security); |
d739b42b | 1167 | kfree(name); |
bd4c625c LT |
1168 | if (retval) { /* reiserfs_new_inode iputs for us */ |
1169 | goto out_failed; | |
1170 | } | |
1da177e4 | 1171 | |
bd4c625c LT |
1172 | reiserfs_update_inode_transaction(inode); |
1173 | reiserfs_update_inode_transaction(parent_dir); | |
1174 | ||
1175 | inode->i_op = &reiserfs_symlink_inode_operations; | |
1176 | inode->i_mapping->a_ops = &reiserfs_address_space_operations; | |
1177 | ||
bd4c625c LT |
1178 | retval = reiserfs_add_entry(&th, parent_dir, dentry->d_name.name, |
1179 | dentry->d_name.len, inode, 1 /*visible */ ); | |
1180 | if (retval) { | |
1181 | int err; | |
6d6b77f1 | 1182 | drop_nlink(inode); |
bd4c625c | 1183 | reiserfs_update_sd(&th, inode); |
58d85426 | 1184 | err = journal_end(&th); |
bd4c625c LT |
1185 | if (err) |
1186 | retval = err; | |
c1eaa26b | 1187 | unlock_new_inode(inode); |
bd4c625c LT |
1188 | iput(inode); |
1189 | goto out_failed; | |
1190 | } | |
1da177e4 | 1191 | |
c1eaa26b | 1192 | unlock_new_inode(inode); |
8fc37ec5 | 1193 | d_instantiate(dentry, inode); |
58d85426 | 1194 | retval = journal_end(&th); |
cf776a7a | 1195 | out_failed: |
bd4c625c LT |
1196 | reiserfs_write_unlock(parent_dir->i_sb); |
1197 | return retval; | |
1da177e4 LT |
1198 | } |
1199 | ||
bd4c625c LT |
1200 | static int reiserfs_link(struct dentry *old_dentry, struct inode *dir, |
1201 | struct dentry *dentry) | |
1202 | { | |
1203 | int retval; | |
2b0143b5 | 1204 | struct inode *inode = d_inode(old_dentry); |
bd4c625c | 1205 | struct reiserfs_transaction_handle th; |
098297b2 JM |
1206 | /* |
1207 | * We need blocks for transaction + update of quotas for | |
1208 | * the owners of the directory | |
1209 | */ | |
bd4c625c LT |
1210 | int jbegin_count = |
1211 | JOURNAL_PER_BALANCE_CNT * 3 + | |
1212 | 2 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
1213 | ||
2e6c97ea JK |
1214 | retval = dquot_initialize(dir); |
1215 | if (retval) | |
1216 | return retval; | |
907f4554 | 1217 | |
bd4c625c LT |
1218 | reiserfs_write_lock(dir->i_sb); |
1219 | if (inode->i_nlink >= REISERFS_LINK_MAX) { | |
098297b2 | 1220 | /* FIXME: sd_nlink is 32 bit for new files */ |
bd4c625c LT |
1221 | reiserfs_write_unlock(dir->i_sb); |
1222 | return -EMLINK; | |
1223 | } | |
bd4c625c LT |
1224 | |
1225 | /* inc before scheduling so reiserfs_unlink knows we are here */ | |
d8c76e6f | 1226 | inc_nlink(inode); |
bd4c625c LT |
1227 | |
1228 | retval = journal_begin(&th, dir->i_sb, jbegin_count); | |
1229 | if (retval) { | |
6d6b77f1 | 1230 | drop_nlink(inode); |
bd4c625c LT |
1231 | reiserfs_write_unlock(dir->i_sb); |
1232 | return retval; | |
1233 | } | |
1234 | ||
1235 | /* create new entry */ | |
1236 | retval = | |
1237 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
1238 | dentry->d_name.len, inode, 1 /*visible */ ); | |
1239 | ||
1240 | reiserfs_update_inode_transaction(inode); | |
1241 | reiserfs_update_inode_transaction(dir); | |
1242 | ||
1243 | if (retval) { | |
1244 | int err; | |
6d6b77f1 | 1245 | drop_nlink(inode); |
58d85426 | 1246 | err = journal_end(&th); |
bd4c625c LT |
1247 | reiserfs_write_unlock(dir->i_sb); |
1248 | return err ? err : retval; | |
1249 | } | |
1250 | ||
1251 | inode->i_ctime = CURRENT_TIME_SEC; | |
1252 | reiserfs_update_sd(&th, inode); | |
1253 | ||
7de9c6ee | 1254 | ihold(inode); |
bd4c625c | 1255 | d_instantiate(dentry, inode); |
58d85426 | 1256 | retval = journal_end(&th); |
bd4c625c LT |
1257 | reiserfs_write_unlock(dir->i_sb); |
1258 | return retval; | |
1259 | } | |
1da177e4 | 1260 | |
0222e657 | 1261 | /* de contains information pointing to an entry which */ |
bd4c625c LT |
1262 | static int de_still_valid(const char *name, int len, |
1263 | struct reiserfs_dir_entry *de) | |
1da177e4 | 1264 | { |
bd4c625c LT |
1265 | struct reiserfs_dir_entry tmp = *de; |
1266 | ||
098297b2 | 1267 | /* recalculate pointer to name and name length */ |
bd4c625c | 1268 | set_de_name_and_namelen(&tmp); |
098297b2 | 1269 | /* FIXME: could check more */ |
bd4c625c LT |
1270 | if (tmp.de_namelen != len || memcmp(name, de->de_name, len)) |
1271 | return 0; | |
1272 | return 1; | |
1da177e4 LT |
1273 | } |
1274 | ||
bd4c625c LT |
1275 | static int entry_points_to_object(const char *name, int len, |
1276 | struct reiserfs_dir_entry *de, | |
1277 | struct inode *inode) | |
1da177e4 | 1278 | { |
bd4c625c LT |
1279 | if (!de_still_valid(name, len, de)) |
1280 | return 0; | |
1281 | ||
1282 | if (inode) { | |
1283 | if (!de_visible(de->de_deh + de->de_entry_num)) | |
c3a9c210 JM |
1284 | reiserfs_panic(inode->i_sb, "vs-7042", |
1285 | "entry must be visible"); | |
bd4c625c LT |
1286 | return (de->de_objectid == inode->i_ino) ? 1 : 0; |
1287 | } | |
1da177e4 | 1288 | |
bd4c625c LT |
1289 | /* this must be added hidden entry */ |
1290 | if (de_visible(de->de_deh + de->de_entry_num)) | |
c3a9c210 | 1291 | reiserfs_panic(NULL, "vs-7043", "entry must be visible"); |
1da177e4 | 1292 | |
bd4c625c | 1293 | return 1; |
1da177e4 LT |
1294 | } |
1295 | ||
1da177e4 | 1296 | /* sets key of objectid the entry has to point to */ |
bd4c625c LT |
1297 | static void set_ino_in_dir_entry(struct reiserfs_dir_entry *de, |
1298 | struct reiserfs_key *key) | |
1da177e4 | 1299 | { |
bd4c625c LT |
1300 | /* JDM These operations are endian safe - both are le */ |
1301 | de->de_deh[de->de_entry_num].deh_dir_id = key->k_dir_id; | |
1302 | de->de_deh[de->de_entry_num].deh_objectid = key->k_objectid; | |
1da177e4 LT |
1303 | } |
1304 | ||
0222e657 | 1305 | /* |
1da177e4 LT |
1306 | * process, that is going to call fix_nodes/do_balance must hold only |
1307 | * one path. If it holds 2 or more, it can get into endless waiting in | |
0222e657 | 1308 | * get_empty_nodes or its clones |
1da177e4 | 1309 | */ |
bd4c625c LT |
1310 | static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
1311 | struct inode *new_dir, struct dentry *new_dentry) | |
1da177e4 | 1312 | { |
bd4c625c LT |
1313 | int retval; |
1314 | INITIALIZE_PATH(old_entry_path); | |
1315 | INITIALIZE_PATH(new_entry_path); | |
1316 | INITIALIZE_PATH(dot_dot_entry_path); | |
1317 | struct item_head new_entry_ih, old_entry_ih, dot_dot_ih; | |
1318 | struct reiserfs_dir_entry old_de, new_de, dot_dot_de; | |
1319 | struct inode *old_inode, *new_dentry_inode; | |
1320 | struct reiserfs_transaction_handle th; | |
1321 | int jbegin_count; | |
1322 | umode_t old_inode_mode; | |
1323 | unsigned long savelink = 1; | |
1324 | struct timespec ctime; | |
1325 | ||
098297b2 JM |
1326 | /* |
1327 | * three balancings: (1) old name removal, (2) new name insertion | |
1328 | * and (3) maybe "save" link insertion | |
1329 | * stat data updates: (1) old directory, | |
1330 | * (2) new directory and (3) maybe old object stat data (when it is | |
1331 | * directory) and (4) maybe stat data of object to which new entry | |
1332 | * pointed initially and (5) maybe block containing ".." of | |
1333 | * renamed directory | |
1334 | * quota updates: two parent directories | |
1335 | */ | |
bd4c625c LT |
1336 | jbegin_count = |
1337 | JOURNAL_PER_BALANCE_CNT * 3 + 5 + | |
1338 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(old_dir->i_sb); | |
1339 | ||
2e6c97ea JK |
1340 | retval = dquot_initialize(old_dir); |
1341 | if (retval) | |
1342 | return retval; | |
1343 | retval = dquot_initialize(new_dir); | |
1344 | if (retval) | |
1345 | return retval; | |
907f4554 | 1346 | |
2b0143b5 DH |
1347 | old_inode = d_inode(old_dentry); |
1348 | new_dentry_inode = d_inode(new_dentry); | |
bd4c625c | 1349 | |
098297b2 JM |
1350 | /* |
1351 | * make sure that oldname still exists and points to an object we | |
1352 | * are going to rename | |
1353 | */ | |
bd4c625c LT |
1354 | old_de.de_gen_number_bit_string = NULL; |
1355 | reiserfs_write_lock(old_dir->i_sb); | |
1356 | retval = | |
1357 | reiserfs_find_entry(old_dir, old_dentry->d_name.name, | |
1358 | old_dentry->d_name.len, &old_entry_path, | |
1359 | &old_de); | |
1360 | pathrelse(&old_entry_path); | |
1361 | if (retval == IO_ERROR) { | |
1da177e4 | 1362 | reiserfs_write_unlock(old_dir->i_sb); |
bd4c625c | 1363 | return -EIO; |
1da177e4 | 1364 | } |
bd4c625c LT |
1365 | |
1366 | if (retval != NAME_FOUND || old_de.de_objectid != old_inode->i_ino) { | |
1367 | reiserfs_write_unlock(old_dir->i_sb); | |
1368 | return -ENOENT; | |
1da177e4 LT |
1369 | } |
1370 | ||
bd4c625c LT |
1371 | old_inode_mode = old_inode->i_mode; |
1372 | if (S_ISDIR(old_inode_mode)) { | |
098297b2 JM |
1373 | /* |
1374 | * make sure that directory being renamed has correct ".." | |
1375 | * and that its new parent directory has not too many links | |
1376 | * already | |
1377 | */ | |
bd4c625c LT |
1378 | if (new_dentry_inode) { |
1379 | if (!reiserfs_empty_dir(new_dentry_inode)) { | |
1380 | reiserfs_write_unlock(old_dir->i_sb); | |
1381 | return -ENOTEMPTY; | |
1382 | } | |
1383 | } | |
1384 | ||
098297b2 JM |
1385 | /* |
1386 | * directory is renamed, its parent directory will be changed, | |
1387 | * so find ".." entry | |
bd4c625c LT |
1388 | */ |
1389 | dot_dot_de.de_gen_number_bit_string = NULL; | |
1390 | retval = | |
1391 | reiserfs_find_entry(old_inode, "..", 2, &dot_dot_entry_path, | |
1392 | &dot_dot_de); | |
1393 | pathrelse(&dot_dot_entry_path); | |
1394 | if (retval != NAME_FOUND) { | |
1395 | reiserfs_write_unlock(old_dir->i_sb); | |
1396 | return -EIO; | |
1397 | } | |
1398 | ||
1399 | /* inode number of .. must equal old_dir->i_ino */ | |
1400 | if (dot_dot_de.de_objectid != old_dir->i_ino) { | |
1401 | reiserfs_write_unlock(old_dir->i_sb); | |
1402 | return -EIO; | |
1403 | } | |
1da177e4 | 1404 | } |
bd4c625c LT |
1405 | |
1406 | retval = journal_begin(&th, old_dir->i_sb, jbegin_count); | |
1407 | if (retval) { | |
1408 | reiserfs_write_unlock(old_dir->i_sb); | |
1409 | return retval; | |
1da177e4 | 1410 | } |
bd4c625c LT |
1411 | |
1412 | /* add new entry (or find the existing one) */ | |
1413 | retval = | |
1414 | reiserfs_add_entry(&th, new_dir, new_dentry->d_name.name, | |
1415 | new_dentry->d_name.len, old_inode, 0); | |
1416 | if (retval == -EEXIST) { | |
1417 | if (!new_dentry_inode) { | |
c3a9c210 JM |
1418 | reiserfs_panic(old_dir->i_sb, "vs-7050", |
1419 | "new entry is found, new inode == 0"); | |
bd4c625c LT |
1420 | } |
1421 | } else if (retval) { | |
58d85426 | 1422 | int err = journal_end(&th); |
bd4c625c LT |
1423 | reiserfs_write_unlock(old_dir->i_sb); |
1424 | return err ? err : retval; | |
1da177e4 LT |
1425 | } |
1426 | ||
bd4c625c LT |
1427 | reiserfs_update_inode_transaction(old_dir); |
1428 | reiserfs_update_inode_transaction(new_dir); | |
1429 | ||
098297b2 JM |
1430 | /* |
1431 | * this makes it so an fsync on an open fd for the old name will | |
1432 | * commit the rename operation | |
bd4c625c LT |
1433 | */ |
1434 | reiserfs_update_inode_transaction(old_inode); | |
1435 | ||
1436 | if (new_dentry_inode) | |
1437 | reiserfs_update_inode_transaction(new_dentry_inode); | |
1438 | ||
1439 | while (1) { | |
098297b2 JM |
1440 | /* |
1441 | * look for old name using corresponding entry key | |
1442 | * (found by reiserfs_find_entry) | |
1443 | */ | |
bd4c625c LT |
1444 | if ((retval = |
1445 | search_by_entry_key(new_dir->i_sb, &old_de.de_entry_key, | |
1446 | &old_entry_path, | |
1447 | &old_de)) != NAME_FOUND) { | |
1448 | pathrelse(&old_entry_path); | |
58d85426 | 1449 | journal_end(&th); |
bd4c625c LT |
1450 | reiserfs_write_unlock(old_dir->i_sb); |
1451 | return -EIO; | |
1452 | } | |
1453 | ||
4cf5f7ad | 1454 | copy_item_head(&old_entry_ih, tp_item_head(&old_entry_path)); |
bd4c625c LT |
1455 | |
1456 | reiserfs_prepare_for_journal(old_inode->i_sb, old_de.de_bh, 1); | |
1457 | ||
098297b2 | 1458 | /* look for new name by reiserfs_find_entry */ |
bd4c625c LT |
1459 | new_de.de_gen_number_bit_string = NULL; |
1460 | retval = | |
1461 | reiserfs_find_entry(new_dir, new_dentry->d_name.name, | |
1462 | new_dentry->d_name.len, &new_entry_path, | |
1463 | &new_de); | |
098297b2 JM |
1464 | /* |
1465 | * reiserfs_add_entry should not return IO_ERROR, | |
1466 | * because it is called with essentially same parameters from | |
1467 | * reiserfs_add_entry above, and we'll catch any i/o errors | |
1468 | * before we get here. | |
1469 | */ | |
bd4c625c LT |
1470 | if (retval != NAME_FOUND_INVISIBLE && retval != NAME_FOUND) { |
1471 | pathrelse(&new_entry_path); | |
1472 | pathrelse(&old_entry_path); | |
58d85426 | 1473 | journal_end(&th); |
bd4c625c LT |
1474 | reiserfs_write_unlock(old_dir->i_sb); |
1475 | return -EIO; | |
1476 | } | |
1477 | ||
4cf5f7ad | 1478 | copy_item_head(&new_entry_ih, tp_item_head(&new_entry_path)); |
bd4c625c LT |
1479 | |
1480 | reiserfs_prepare_for_journal(old_inode->i_sb, new_de.de_bh, 1); | |
1481 | ||
1482 | if (S_ISDIR(old_inode->i_mode)) { | |
1483 | if ((retval = | |
1484 | search_by_entry_key(new_dir->i_sb, | |
1485 | &dot_dot_de.de_entry_key, | |
1486 | &dot_dot_entry_path, | |
1487 | &dot_dot_de)) != NAME_FOUND) { | |
1488 | pathrelse(&dot_dot_entry_path); | |
1489 | pathrelse(&new_entry_path); | |
1490 | pathrelse(&old_entry_path); | |
58d85426 | 1491 | journal_end(&th); |
bd4c625c LT |
1492 | reiserfs_write_unlock(old_dir->i_sb); |
1493 | return -EIO; | |
1494 | } | |
1495 | copy_item_head(&dot_dot_ih, | |
4cf5f7ad | 1496 | tp_item_head(&dot_dot_entry_path)); |
098297b2 | 1497 | /* node containing ".." gets into transaction */ |
bd4c625c LT |
1498 | reiserfs_prepare_for_journal(old_inode->i_sb, |
1499 | dot_dot_de.de_bh, 1); | |
1500 | } | |
098297b2 JM |
1501 | /* |
1502 | * we should check seals here, not do | |
1503 | * this stuff, yes? Then, having | |
1504 | * gathered everything into RAM we | |
1505 | * should lock the buffers, yes? -Hans | |
1506 | */ | |
1507 | /* | |
1508 | * probably. our rename needs to hold more | |
1509 | * than one path at once. The seals would | |
1510 | * have to be written to deal with multi-path | |
1511 | * issues -chris | |
bd4c625c | 1512 | */ |
098297b2 JM |
1513 | /* |
1514 | * sanity checking before doing the rename - avoid races many | |
1515 | * of the above checks could have scheduled. We have to be | |
1516 | * sure our items haven't been shifted by another process. | |
bd4c625c LT |
1517 | */ |
1518 | if (item_moved(&new_entry_ih, &new_entry_path) || | |
1519 | !entry_points_to_object(new_dentry->d_name.name, | |
1520 | new_dentry->d_name.len, | |
1521 | &new_de, new_dentry_inode) || | |
1522 | item_moved(&old_entry_ih, &old_entry_path) || | |
1523 | !entry_points_to_object(old_dentry->d_name.name, | |
1524 | old_dentry->d_name.len, | |
1525 | &old_de, old_inode)) { | |
1526 | reiserfs_restore_prepared_buffer(old_inode->i_sb, | |
1527 | new_de.de_bh); | |
1528 | reiserfs_restore_prepared_buffer(old_inode->i_sb, | |
1529 | old_de.de_bh); | |
1530 | if (S_ISDIR(old_inode_mode)) | |
1531 | reiserfs_restore_prepared_buffer(old_inode-> | |
1532 | i_sb, | |
1533 | dot_dot_de. | |
1534 | de_bh); | |
1535 | continue; | |
1536 | } | |
1537 | if (S_ISDIR(old_inode_mode)) { | |
1538 | if (item_moved(&dot_dot_ih, &dot_dot_entry_path) || | |
1539 | !entry_points_to_object("..", 2, &dot_dot_de, | |
1540 | old_dir)) { | |
1541 | reiserfs_restore_prepared_buffer(old_inode-> | |
1542 | i_sb, | |
1543 | old_de.de_bh); | |
1544 | reiserfs_restore_prepared_buffer(old_inode-> | |
1545 | i_sb, | |
1546 | new_de.de_bh); | |
1547 | reiserfs_restore_prepared_buffer(old_inode-> | |
1548 | i_sb, | |
1549 | dot_dot_de. | |
1550 | de_bh); | |
1551 | continue; | |
1552 | } | |
1553 | } | |
1554 | ||
1555 | RFALSE(S_ISDIR(old_inode_mode) && | |
1556 | !buffer_journal_prepared(dot_dot_de.de_bh), ""); | |
1557 | ||
1558 | break; | |
1da177e4 LT |
1559 | } |
1560 | ||
098297b2 JM |
1561 | /* |
1562 | * ok, all the changes can be done in one fell swoop when we | |
1563 | * have claimed all the buffers needed. | |
1564 | */ | |
1da177e4 | 1565 | |
bd4c625c LT |
1566 | mark_de_visible(new_de.de_deh + new_de.de_entry_num); |
1567 | set_ino_in_dir_entry(&new_de, INODE_PKEY(old_inode)); | |
09f1b80b | 1568 | journal_mark_dirty(&th, new_de.de_bh); |
1da177e4 | 1569 | |
bd4c625c | 1570 | mark_de_hidden(old_de.de_deh + old_de.de_entry_num); |
09f1b80b | 1571 | journal_mark_dirty(&th, old_de.de_bh); |
bd4c625c LT |
1572 | ctime = CURRENT_TIME_SEC; |
1573 | old_dir->i_ctime = old_dir->i_mtime = ctime; | |
1574 | new_dir->i_ctime = new_dir->i_mtime = ctime; | |
098297b2 JM |
1575 | /* |
1576 | * thanks to Alex Adriaanse <alex_a@caltech.edu> for patch | |
1577 | * which adds ctime update of renamed object | |
1578 | */ | |
bd4c625c LT |
1579 | old_inode->i_ctime = ctime; |
1580 | ||
1581 | if (new_dentry_inode) { | |
098297b2 | 1582 | /* adjust link number of the victim */ |
bd4c625c | 1583 | if (S_ISDIR(new_dentry_inode->i_mode)) { |
ce71ec36 | 1584 | clear_nlink(new_dentry_inode); |
bd4c625c | 1585 | } else { |
9a53c3a7 | 1586 | drop_nlink(new_dentry_inode); |
bd4c625c LT |
1587 | } |
1588 | new_dentry_inode->i_ctime = ctime; | |
1589 | savelink = new_dentry_inode->i_nlink; | |
1da177e4 | 1590 | } |
bd4c625c | 1591 | |
1da177e4 | 1592 | if (S_ISDIR(old_inode_mode)) { |
0222e657 | 1593 | /* adjust ".." of renamed directory */ |
bd4c625c | 1594 | set_ino_in_dir_entry(&dot_dot_de, INODE_PKEY(new_dir)); |
09f1b80b | 1595 | journal_mark_dirty(&th, dot_dot_de.de_bh); |
bd4c625c | 1596 | |
098297b2 JM |
1597 | /* |
1598 | * there (in new_dir) was no directory, so it got new link | |
1599 | * (".." of renamed directory) | |
1600 | */ | |
bd4c625c | 1601 | if (!new_dentry_inode) |
bd4c625c LT |
1602 | INC_DIR_INODE_NLINK(new_dir); |
1603 | ||
1604 | /* old directory lost one link - ".. " of renamed directory */ | |
1605 | DEC_DIR_INODE_NLINK(old_dir); | |
1da177e4 | 1606 | } |
098297b2 JM |
1607 | /* |
1608 | * looks like in 2.3.99pre3 brelse is atomic. | |
1609 | * so we can use pathrelse | |
1610 | */ | |
bd4c625c LT |
1611 | pathrelse(&new_entry_path); |
1612 | pathrelse(&dot_dot_entry_path); | |
1da177e4 | 1613 | |
098297b2 JM |
1614 | /* |
1615 | * FIXME: this reiserfs_cut_from_item's return value may screw up | |
1616 | * anybody, but it will panic if will not be able to find the | |
1617 | * entry. This needs one more clean up | |
1618 | */ | |
bd4c625c | 1619 | if (reiserfs_cut_from_item |
a228bf8f | 1620 | (&th, &old_entry_path, &old_de.de_entry_key, old_dir, NULL, |
bd4c625c | 1621 | 0) < 0) |
0030b645 JM |
1622 | reiserfs_error(old_dir->i_sb, "vs-7060", |
1623 | "couldn't not cut old name. Fsck later?"); | |
bd4c625c LT |
1624 | |
1625 | old_dir->i_size -= DEH_SIZE + old_de.de_entrylen; | |
1626 | ||
1627 | reiserfs_update_sd(&th, old_dir); | |
1628 | reiserfs_update_sd(&th, new_dir); | |
1629 | reiserfs_update_sd(&th, old_inode); | |
1630 | ||
1631 | if (new_dentry_inode) { | |
1632 | if (savelink == 0) | |
1633 | add_save_link(&th, new_dentry_inode, | |
1634 | 0 /* not truncate */ ); | |
1635 | reiserfs_update_sd(&th, new_dentry_inode); | |
1da177e4 | 1636 | } |
bd4c625c | 1637 | |
58d85426 | 1638 | retval = journal_end(&th); |
bd4c625c LT |
1639 | reiserfs_write_unlock(old_dir->i_sb); |
1640 | return retval; | |
1da177e4 LT |
1641 | } |
1642 | ||
098297b2 | 1643 | /* directories can handle most operations... */ |
c5ef1c42 | 1644 | const struct inode_operations reiserfs_dir_inode_operations = { |
bd4c625c LT |
1645 | .create = reiserfs_create, |
1646 | .lookup = reiserfs_lookup, | |
1647 | .link = reiserfs_link, | |
1648 | .unlink = reiserfs_unlink, | |
1649 | .symlink = reiserfs_symlink, | |
1650 | .mkdir = reiserfs_mkdir, | |
1651 | .rmdir = reiserfs_rmdir, | |
1652 | .mknod = reiserfs_mknod, | |
1653 | .rename = reiserfs_rename, | |
1654 | .setattr = reiserfs_setattr, | |
1655 | .setxattr = reiserfs_setxattr, | |
1656 | .getxattr = reiserfs_getxattr, | |
1657 | .listxattr = reiserfs_listxattr, | |
1658 | .removexattr = reiserfs_removexattr, | |
1659 | .permission = reiserfs_permission, | |
4e34e719 | 1660 | .get_acl = reiserfs_get_acl, |
47f70d08 | 1661 | .set_acl = reiserfs_set_acl, |
1da177e4 LT |
1662 | }; |
1663 | ||
1664 | /* | |
1665 | * symlink operations.. same as page_symlink_inode_operations, with xattr | |
1666 | * stuff added | |
1667 | */ | |
c5ef1c42 | 1668 | const struct inode_operations reiserfs_symlink_inode_operations = { |
bd4c625c LT |
1669 | .readlink = generic_readlink, |
1670 | .follow_link = page_follow_link_light, | |
1671 | .put_link = page_put_link, | |
1672 | .setattr = reiserfs_setattr, | |
1673 | .setxattr = reiserfs_setxattr, | |
1674 | .getxattr = reiserfs_getxattr, | |
1675 | .listxattr = reiserfs_listxattr, | |
1676 | .removexattr = reiserfs_removexattr, | |
1677 | .permission = reiserfs_permission, | |
1da177e4 LT |
1678 | }; |
1679 | ||
1da177e4 LT |
1680 | /* |
1681 | * special file operations.. just xattr/acl stuff | |
1682 | */ | |
c5ef1c42 | 1683 | const struct inode_operations reiserfs_special_inode_operations = { |
bd4c625c LT |
1684 | .setattr = reiserfs_setattr, |
1685 | .setxattr = reiserfs_setxattr, | |
1686 | .getxattr = reiserfs_getxattr, | |
1687 | .listxattr = reiserfs_listxattr, | |
1688 | .removexattr = reiserfs_removexattr, | |
1689 | .permission = reiserfs_permission, | |
4e34e719 | 1690 | .get_acl = reiserfs_get_acl, |
47f70d08 | 1691 | .set_acl = reiserfs_set_acl, |
1da177e4 | 1692 | }; |