Commit | Line | Data |
---|---|---|
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)--; | |
c3754da3 | 135 | break; |
bd4c625c LT |
136 | |
137 | case ITEM_FOUND: | |
138 | break; | |
139 | ||
140 | case IO_ERROR: | |
141 | return retval; | |
142 | ||
143 | default: | |
144 | pathrelse(path); | |
0030b645 | 145 | reiserfs_error(sb, "vs-7002", "no path to here"); |
bd4c625c | 146 | return IO_ERROR; |
1da177e4 | 147 | } |
1da177e4 | 148 | |
bd4c625c | 149 | set_de_item_location(de, path); |
1da177e4 LT |
150 | |
151 | #ifdef CONFIG_REISERFS_CHECK | |
bd4c625c | 152 | if (!is_direntry_le_ih(de->de_ih) || |
a228bf8f | 153 | COMP_SHORT_KEYS(&de->de_ih->ih_key, key)) { |
bd4c625c | 154 | print_block(de->de_bh, 0, -1, -1); |
c3a9c210 JM |
155 | reiserfs_panic(sb, "vs-7005", "found item %h is not directory " |
156 | "item or does not belong to the same directory " | |
157 | "as key %K", de->de_ih, key); | |
bd4c625c LT |
158 | } |
159 | #endif /* CONFIG_REISERFS_CHECK */ | |
160 | ||
098297b2 JM |
161 | /* |
162 | * binary search in directory item by third component of the | |
163 | * key. sets de->de_entry_num of de | |
164 | */ | |
bd4c625c LT |
165 | retval = bin_search_in_dir_item(de, cpu_key_k_offset(key)); |
166 | path->pos_in_item = de->de_entry_num; | |
167 | if (retval != NAME_NOT_FOUND) { | |
098297b2 JM |
168 | /* |
169 | * ugly, but rename needs de_bh, de_deh, de_name, | |
170 | * de_namelen, de_objectid set | |
171 | */ | |
bd4c625c LT |
172 | set_de_name_and_namelen(de); |
173 | set_de_object_key(de); | |
174 | } | |
175 | return retval; | |
1da177e4 LT |
176 | } |
177 | ||
1da177e4 LT |
178 | /* Keyed 32-bit hash function using TEA in a Davis-Meyer function */ |
179 | ||
098297b2 JM |
180 | /* |
181 | * The third component is hashed, and you can choose from more than | |
182 | * one hash function. Per directory hashes are not yet implemented | |
183 | * but are thought about. This function should be moved to hashes.c | |
184 | * Jedi, please do so. -Hans | |
185 | */ | |
bd4c625c LT |
186 | static __u32 get_third_component(struct super_block *s, |
187 | const char *name, int len) | |
1da177e4 | 188 | { |
bd4c625c LT |
189 | __u32 res; |
190 | ||
191 | if (!len || (len == 1 && name[0] == '.')) | |
192 | return DOT_OFFSET; | |
193 | if (len == 2 && name[0] == '.' && name[1] == '.') | |
194 | return DOT_DOT_OFFSET; | |
195 | ||
196 | res = REISERFS_SB(s)->s_hash_function(name, len); | |
197 | ||
098297b2 | 198 | /* take bits from 7-th to 30-th including both bounds */ |
bd4c625c LT |
199 | res = GET_HASH_VALUE(res); |
200 | if (res == 0) | |
098297b2 JM |
201 | /* |
202 | * needed to have no names before "." and ".." those have hash | |
203 | * value == 0 and generation conters 1 and 2 accordingly | |
204 | */ | |
bd4c625c LT |
205 | res = 128; |
206 | return res + MAX_GENERATION_NUMBER; | |
1da177e4 LT |
207 | } |
208 | ||
bd4c625c LT |
209 | static int reiserfs_match(struct reiserfs_dir_entry *de, |
210 | const char *name, int namelen) | |
1da177e4 | 211 | { |
bd4c625c | 212 | int retval = NAME_NOT_FOUND; |
1da177e4 | 213 | |
bd4c625c LT |
214 | if ((namelen == de->de_namelen) && |
215 | !memcmp(de->de_name, name, de->de_namelen)) | |
216 | retval = | |
217 | (de_visible(de->de_deh + de->de_entry_num) ? NAME_FOUND : | |
218 | NAME_FOUND_INVISIBLE); | |
1da177e4 | 219 | |
bd4c625c | 220 | return retval; |
1da177e4 LT |
221 | } |
222 | ||
1da177e4 LT |
223 | /* de's de_bh, de_ih, de_deh, de_item_num, de_entry_num are set already */ |
224 | ||
098297b2 | 225 | /* used when hash collisions exist */ |
1da177e4 | 226 | |
bd4c625c LT |
227 | static int linear_search_in_dir_item(struct cpu_key *key, |
228 | struct reiserfs_dir_entry *de, | |
229 | const char *name, int namelen) | |
1da177e4 | 230 | { |
bd4c625c LT |
231 | struct reiserfs_de_head *deh = de->de_deh; |
232 | int retval; | |
233 | int i; | |
1da177e4 | 234 | |
bd4c625c | 235 | i = de->de_entry_num; |
1da177e4 | 236 | |
4cf5f7ad | 237 | if (i == ih_entry_count(de->de_ih) || |
bd4c625c LT |
238 | GET_HASH_VALUE(deh_offset(deh + i)) != |
239 | GET_HASH_VALUE(cpu_key_k_offset(key))) { | |
240 | i--; | |
241 | } | |
1da177e4 | 242 | |
bd4c625c LT |
243 | RFALSE(de->de_deh != B_I_DEH(de->de_bh, de->de_ih), |
244 | "vs-7010: array of entry headers not found"); | |
1da177e4 | 245 | |
bd4c625c | 246 | deh += i; |
1da177e4 | 247 | |
bd4c625c | 248 | for (; i >= 0; i--, deh--) { |
098297b2 | 249 | /* hash value does not match, no need to check whole name */ |
bd4c625c LT |
250 | if (GET_HASH_VALUE(deh_offset(deh)) != |
251 | GET_HASH_VALUE(cpu_key_k_offset(key))) { | |
bd4c625c LT |
252 | return NAME_NOT_FOUND; |
253 | } | |
254 | ||
098297b2 | 255 | /* mark that this generation number is used */ |
bd4c625c LT |
256 | if (de->de_gen_number_bit_string) |
257 | set_bit(GET_GENERATION_NUMBER(deh_offset(deh)), | |
3af1efe8 | 258 | de->de_gen_number_bit_string); |
1da177e4 | 259 | |
098297b2 | 260 | /* calculate pointer to name and namelen */ |
bd4c625c LT |
261 | de->de_entry_num = i; |
262 | set_de_name_and_namelen(de); | |
1da177e4 | 263 | |
098297b2 JM |
264 | /* |
265 | * de's de_name, de_namelen, de_recordlen are set. | |
266 | * Fill the rest. | |
267 | */ | |
bd4c625c LT |
268 | if ((retval = |
269 | reiserfs_match(de, name, namelen)) != NAME_NOT_FOUND) { | |
1da177e4 | 270 | |
098297b2 | 271 | /* key of pointed object */ |
bd4c625c | 272 | set_de_object_key(de); |
1da177e4 | 273 | |
bd4c625c | 274 | store_de_entry_key(de); |
1da177e4 | 275 | |
098297b2 | 276 | /* retval can be NAME_FOUND or NAME_FOUND_INVISIBLE */ |
bd4c625c LT |
277 | return retval; |
278 | } | |
1da177e4 | 279 | } |
1da177e4 | 280 | |
bd4c625c | 281 | if (GET_GENERATION_NUMBER(le_ih_k_offset(de->de_ih)) == 0) |
098297b2 JM |
282 | /* |
283 | * we have reached left most entry in the node. In common we | |
284 | * have to go to the left neighbor, but if generation counter | |
285 | * is 0 already, we know for sure, that there is no name with | |
286 | * the same hash value | |
287 | */ | |
288 | /* | |
289 | * FIXME: this work correctly only because hash value can not | |
290 | * be 0. Btw, in case of Yura's hash it is probably possible, | |
291 | * so, this is a bug | |
292 | */ | |
bd4c625c | 293 | return NAME_NOT_FOUND; |
1da177e4 | 294 | |
bd4c625c LT |
295 | RFALSE(de->de_item_num, |
296 | "vs-7015: two diritems of the same directory in one node?"); | |
1da177e4 | 297 | |
bd4c625c LT |
298 | return GOTO_PREVIOUS_ITEM; |
299 | } | |
1da177e4 | 300 | |
098297b2 JM |
301 | /* |
302 | * may return NAME_FOUND, NAME_FOUND_INVISIBLE, NAME_NOT_FOUND | |
303 | * FIXME: should add something like IOERROR | |
304 | */ | |
bd4c625c | 305 | static int reiserfs_find_entry(struct inode *dir, const char *name, int namelen, |
fec6d055 | 306 | struct treepath *path_to_entry, |
bd4c625c | 307 | struct reiserfs_dir_entry *de) |
1da177e4 | 308 | { |
bd4c625c LT |
309 | struct cpu_key key_to_search; |
310 | int retval; | |
311 | ||
312 | if (namelen > REISERFS_MAX_NAME(dir->i_sb->s_blocksize)) | |
313 | return NAME_NOT_FOUND; | |
314 | ||
315 | /* we will search for this key in the tree */ | |
316 | make_cpu_key(&key_to_search, dir, | |
317 | get_third_component(dir->i_sb, name, namelen), | |
318 | TYPE_DIRENTRY, 3); | |
319 | ||
320 | while (1) { | |
321 | retval = | |
322 | search_by_entry_key(dir->i_sb, &key_to_search, | |
323 | path_to_entry, de); | |
324 | if (retval == IO_ERROR) { | |
0030b645 | 325 | reiserfs_error(dir->i_sb, "zam-7001", "io error"); |
bd4c625c LT |
326 | return IO_ERROR; |
327 | } | |
328 | ||
329 | /* compare names for all entries having given hash value */ | |
330 | retval = | |
331 | linear_search_in_dir_item(&key_to_search, de, name, | |
332 | namelen); | |
098297b2 JM |
333 | /* |
334 | * there is no need to scan directory anymore. | |
335 | * Given entry found or does not exist | |
336 | */ | |
bd4c625c | 337 | if (retval != GOTO_PREVIOUS_ITEM) { |
bd4c625c LT |
338 | path_to_entry->pos_in_item = de->de_entry_num; |
339 | return retval; | |
340 | } | |
341 | ||
098297b2 JM |
342 | /* |
343 | * there is left neighboring item of this directory | |
344 | * and given entry can be there | |
345 | */ | |
bd4c625c LT |
346 | set_cpu_key_k_offset(&key_to_search, |
347 | le_ih_k_offset(de->de_ih) - 1); | |
348 | pathrelse(path_to_entry); | |
349 | ||
350 | } /* while (1) */ | |
1da177e4 LT |
351 | } |
352 | ||
bd4c625c | 353 | static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 354 | unsigned int flags) |
1da177e4 | 355 | { |
bd4c625c LT |
356 | int retval; |
357 | struct inode *inode = NULL; | |
358 | struct reiserfs_dir_entry de; | |
359 | INITIALIZE_PATH(path_to_entry); | |
360 | ||
361 | if (REISERFS_MAX_NAME(dir->i_sb->s_blocksize) < dentry->d_name.len) | |
362 | return ERR_PTR(-ENAMETOOLONG); | |
363 | ||
278f6679 | 364 | reiserfs_write_lock(dir->i_sb); |
b1c839bb | 365 | |
bd4c625c LT |
366 | de.de_gen_number_bit_string = NULL; |
367 | retval = | |
368 | reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, | |
369 | &path_to_entry, &de); | |
370 | pathrelse(&path_to_entry); | |
371 | if (retval == NAME_FOUND) { | |
677c9b2e | 372 | inode = reiserfs_iget(dir->i_sb, |
a228bf8f | 373 | (struct cpu_key *)&de.de_dir_id); |
bd4c625c | 374 | if (!inode || IS_ERR(inode)) { |
278f6679 | 375 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c LT |
376 | return ERR_PTR(-EACCES); |
377 | } | |
378 | ||
098297b2 JM |
379 | /* |
380 | * Propagate the private flag so we know we're | |
60e4cf67 JM |
381 | * in the priv tree. Also clear IOP_XATTR |
382 | * since we don't have xattrs on xattr files. | |
098297b2 | 383 | */ |
60e4cf67 | 384 | if (IS_PRIVATE(dir)) { |
6dfede69 | 385 | inode->i_flags |= S_PRIVATE; |
60e4cf67 JM |
386 | inode->i_opflags &= ~IOP_XATTR; |
387 | } | |
bd4c625c | 388 | } |
278f6679 | 389 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c LT |
390 | if (retval == IO_ERROR) { |
391 | return ERR_PTR(-EIO); | |
1da177e4 LT |
392 | } |
393 | ||
d9975d6b | 394 | return d_splice_alias(inode, dentry); |
bd4c625c | 395 | } |
1da177e4 | 396 | |
0222e657 | 397 | /* |
098297b2 JM |
398 | * looks up the dentry of the parent directory for child. |
399 | * taken from ext2_get_parent | |
400 | */ | |
1da177e4 LT |
401 | struct dentry *reiserfs_get_parent(struct dentry *child) |
402 | { | |
bd4c625c LT |
403 | int retval; |
404 | struct inode *inode = NULL; | |
405 | struct reiserfs_dir_entry de; | |
406 | INITIALIZE_PATH(path_to_entry); | |
2b0143b5 | 407 | struct inode *dir = d_inode(child); |
bd4c625c LT |
408 | |
409 | if (dir->i_nlink == 0) { | |
410 | return ERR_PTR(-ENOENT); | |
411 | } | |
412 | de.de_gen_number_bit_string = NULL; | |
413 | ||
414 | reiserfs_write_lock(dir->i_sb); | |
415 | retval = reiserfs_find_entry(dir, "..", 2, &path_to_entry, &de); | |
416 | pathrelse(&path_to_entry); | |
417 | if (retval != NAME_FOUND) { | |
418 | reiserfs_write_unlock(dir->i_sb); | |
419 | return ERR_PTR(-ENOENT); | |
420 | } | |
a228bf8f | 421 | inode = reiserfs_iget(dir->i_sb, (struct cpu_key *)&de.de_dir_id); |
1da177e4 | 422 | reiserfs_write_unlock(dir->i_sb); |
1da177e4 | 423 | |
44003728 | 424 | return d_obtain_alias(inode); |
bd4c625c | 425 | } |
1da177e4 | 426 | |
0222e657 | 427 | /* add entry to the directory (entry can be hidden). |
1da177e4 LT |
428 | |
429 | insert definition of when hidden directories are used here -Hans | |
430 | ||
431 | Does not mark dir inode dirty, do it after successesfull call to it */ | |
432 | ||
bd4c625c LT |
433 | static int reiserfs_add_entry(struct reiserfs_transaction_handle *th, |
434 | struct inode *dir, const char *name, int namelen, | |
435 | struct inode *inode, int visible) | |
1da177e4 | 436 | { |
bd4c625c LT |
437 | struct cpu_key entry_key; |
438 | struct reiserfs_de_head *deh; | |
439 | INITIALIZE_PATH(path); | |
440 | struct reiserfs_dir_entry de; | |
3af1efe8 | 441 | DECLARE_BITMAP(bit_string, MAX_GENERATION_NUMBER + 1); |
bd4c625c | 442 | int gen_number; |
098297b2 JM |
443 | |
444 | /* | |
445 | * 48 bytes now and we avoid kmalloc if we | |
446 | * create file with short name | |
447 | */ | |
448 | char small_buf[32 + DEH_SIZE]; | |
449 | ||
bd4c625c LT |
450 | char *buffer; |
451 | int buflen, paste_size; | |
452 | int retval; | |
453 | ||
454 | BUG_ON(!th->t_trans_id); | |
455 | ||
456 | /* cannot allow items to be added into a busy deleted directory */ | |
457 | if (!namelen) | |
458 | return -EINVAL; | |
459 | ||
460 | if (namelen > REISERFS_MAX_NAME(dir->i_sb->s_blocksize)) | |
461 | return -ENAMETOOLONG; | |
462 | ||
463 | /* each entry has unique key. compose it */ | |
464 | make_cpu_key(&entry_key, dir, | |
465 | get_third_component(dir->i_sb, name, namelen), | |
466 | TYPE_DIRENTRY, 3); | |
467 | ||
468 | /* get memory for composing the entry */ | |
469 | buflen = DEH_SIZE + ROUND_UP(namelen); | |
470 | if (buflen > sizeof(small_buf)) { | |
d739b42b | 471 | buffer = kmalloc(buflen, GFP_NOFS); |
9dce07f1 | 472 | if (!buffer) |
bd4c625c LT |
473 | return -ENOMEM; |
474 | } else | |
475 | buffer = small_buf; | |
476 | ||
477 | paste_size = | |
478 | (get_inode_sd_version(dir) == | |
479 | STAT_DATA_V1) ? (DEH_SIZE + namelen) : buflen; | |
480 | ||
098297b2 JM |
481 | /* |
482 | * fill buffer : directory entry head, name[, dir objectid | , | |
483 | * stat data | ,stat data, dir objectid ] | |
484 | */ | |
bd4c625c LT |
485 | deh = (struct reiserfs_de_head *)buffer; |
486 | deh->deh_location = 0; /* JDM Endian safe if 0 */ | |
487 | put_deh_offset(deh, cpu_key_k_offset(&entry_key)); | |
488 | deh->deh_state = 0; /* JDM Endian safe if 0 */ | |
489 | /* put key (ino analog) to de */ | |
098297b2 JM |
490 | |
491 | /* safe: k_dir_id is le */ | |
492 | deh->deh_dir_id = INODE_PKEY(inode)->k_dir_id; | |
493 | /* safe: k_objectid is le */ | |
494 | deh->deh_objectid = INODE_PKEY(inode)->k_objectid; | |
bd4c625c LT |
495 | |
496 | /* copy name */ | |
497 | memcpy((char *)(deh + 1), name, namelen); | |
498 | /* padd by 0s to the 4 byte boundary */ | |
499 | padd_item((char *)(deh + 1), ROUND_UP(namelen), namelen); | |
500 | ||
098297b2 JM |
501 | /* |
502 | * entry is ready to be pasted into tree, set 'visibility' | |
503 | * and 'stat data in entry' attributes | |
504 | */ | |
bd4c625c LT |
505 | mark_de_without_sd(deh); |
506 | visible ? mark_de_visible(deh) : mark_de_hidden(deh); | |
507 | ||
508 | /* find the proper place for the new entry */ | |
509 | memset(bit_string, 0, sizeof(bit_string)); | |
3af1efe8 | 510 | de.de_gen_number_bit_string = bit_string; |
bd4c625c LT |
511 | retval = reiserfs_find_entry(dir, name, namelen, &path, &de); |
512 | if (retval != NAME_NOT_FOUND) { | |
513 | if (buffer != small_buf) | |
d739b42b | 514 | kfree(buffer); |
bd4c625c LT |
515 | pathrelse(&path); |
516 | ||
517 | if (retval == IO_ERROR) { | |
518 | return -EIO; | |
519 | } | |
520 | ||
521 | if (retval != NAME_FOUND) { | |
0030b645 JM |
522 | reiserfs_error(dir->i_sb, "zam-7002", |
523 | "reiserfs_find_entry() returned " | |
524 | "unexpected value (%d)", retval); | |
bd4c625c LT |
525 | } |
526 | ||
527 | return -EEXIST; | |
528 | } | |
1da177e4 | 529 | |
bd4c625c | 530 | gen_number = |
3af1efe8 | 531 | find_first_zero_bit(bit_string, |
bd4c625c LT |
532 | MAX_GENERATION_NUMBER + 1); |
533 | if (gen_number > MAX_GENERATION_NUMBER) { | |
534 | /* there is no free generation number */ | |
45b03d5e JM |
535 | reiserfs_warning(dir->i_sb, "reiserfs-7010", |
536 | "Congratulations! we have got hash function " | |
537 | "screwed up"); | |
bd4c625c | 538 | if (buffer != small_buf) |
d739b42b | 539 | kfree(buffer); |
bd4c625c LT |
540 | pathrelse(&path); |
541 | return -EBUSY; | |
542 | } | |
543 | /* adjust offset of directory enrty */ | |
544 | put_deh_offset(deh, SET_GENERATION_NUMBER(deh_offset(deh), gen_number)); | |
545 | set_cpu_key_k_offset(&entry_key, deh_offset(deh)); | |
546 | ||
547 | /* update max-hash-collisions counter in reiserfs_sb_info */ | |
548 | PROC_INFO_MAX(th->t_super, max_hash_collisions, gen_number); | |
549 | ||
098297b2 JM |
550 | /* we need to re-search for the insertion point */ |
551 | if (gen_number != 0) { | |
bd4c625c LT |
552 | if (search_by_entry_key(dir->i_sb, &entry_key, &path, &de) != |
553 | NAME_NOT_FOUND) { | |
45b03d5e JM |
554 | reiserfs_warning(dir->i_sb, "vs-7032", |
555 | "entry with this key (%K) already " | |
556 | "exists", &entry_key); | |
bd4c625c LT |
557 | |
558 | if (buffer != small_buf) | |
d739b42b | 559 | kfree(buffer); |
bd4c625c LT |
560 | pathrelse(&path); |
561 | return -EBUSY; | |
562 | } | |
1da177e4 LT |
563 | } |
564 | ||
bd4c625c LT |
565 | /* perform the insertion of the entry that we have prepared */ |
566 | retval = | |
567 | reiserfs_paste_into_item(th, &path, &entry_key, dir, buffer, | |
568 | paste_size); | |
569 | if (buffer != small_buf) | |
d739b42b | 570 | kfree(buffer); |
bd4c625c LT |
571 | if (retval) { |
572 | reiserfs_check_path(&path); | |
573 | return retval; | |
1da177e4 | 574 | } |
1da177e4 | 575 | |
bd4c625c | 576 | dir->i_size += paste_size; |
02027d42 | 577 | dir->i_mtime = dir->i_ctime = current_time(dir); |
bd4c625c | 578 | if (!S_ISDIR(inode->i_mode) && visible) |
098297b2 | 579 | /* reiserfs_mkdir or reiserfs_rename will do that by itself */ |
bd4c625c | 580 | reiserfs_update_sd(th, dir); |
1da177e4 | 581 | |
bd4c625c LT |
582 | reiserfs_check_path(&path); |
583 | return 0; | |
1da177e4 LT |
584 | } |
585 | ||
098297b2 JM |
586 | /* |
587 | * quota utility function, call if you've had to abort after calling | |
588 | * new_inode_init, and have not called reiserfs_new_inode yet. | |
589 | * This should only be called on inodes that do not have stat data | |
590 | * inserted into the tree yet. | |
591 | */ | |
bd4c625c LT |
592 | static int drop_new_inode(struct inode *inode) |
593 | { | |
9f754758 | 594 | dquot_drop(inode); |
bd4c625c LT |
595 | make_bad_inode(inode); |
596 | inode->i_flags |= S_NOQUOTA; | |
597 | iput(inode); | |
598 | return 0; | |
1da177e4 LT |
599 | } |
600 | ||
098297b2 JM |
601 | /* |
602 | * utility function that does setup for reiserfs_new_inode. | |
603 | * dquot_initialize needs lots of credits so it's better to have it | |
604 | * outside of a transaction, so we had to pull some bits of | |
605 | * reiserfs_new_inode out into this func. | |
606 | */ | |
8e071892 | 607 | static int new_inode_init(struct inode *inode, struct inode *dir, umode_t mode) |
bd4c625c | 608 | { |
098297b2 JM |
609 | /* |
610 | * Make inode invalid - just in case we are going to drop it before | |
611 | * the initialization happens | |
612 | */ | |
1b0a74d1 | 613 | INODE_PKEY(inode)->k_objectid = 0; |
098297b2 JM |
614 | |
615 | /* | |
616 | * the quota init calls have to know who to charge the quota to, so | |
617 | * we have to set uid and gid here | |
04b7ed0d | 618 | */ |
21cb47be | 619 | inode_init_owner(&init_user_ns, inode, dir, mode); |
2e6c97ea | 620 | return dquot_initialize(inode); |
1da177e4 LT |
621 | } |
622 | ||
549c7297 CB |
623 | static int reiserfs_create(struct user_namespace *mnt_userns, struct inode *dir, |
624 | struct dentry *dentry, umode_t mode, bool excl) | |
1da177e4 | 625 | { |
bd4c625c LT |
626 | int retval; |
627 | struct inode *inode; | |
098297b2 JM |
628 | /* |
629 | * We need blocks for transaction + (user+group)*(quotas | |
630 | * for new inode + update of quota for directory owner) | |
631 | */ | |
bd4c625c LT |
632 | int jbegin_count = |
633 | JOURNAL_PER_BALANCE_CNT * 2 + | |
634 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
635 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
636 | struct reiserfs_transaction_handle th; | |
57fe60df | 637 | struct reiserfs_security_handle security; |
bd4c625c | 638 | |
2e6c97ea JK |
639 | retval = dquot_initialize(dir); |
640 | if (retval) | |
641 | return retval; | |
907f4554 | 642 | |
bd4c625c LT |
643 | if (!(inode = new_inode(dir->i_sb))) { |
644 | return -ENOMEM; | |
645 | } | |
2e6c97ea JK |
646 | retval = new_inode_init(inode, dir, mode); |
647 | if (retval) { | |
648 | drop_new_inode(inode); | |
649 | return retval; | |
650 | } | |
1da177e4 | 651 | |
0ab2621e | 652 | jbegin_count += reiserfs_cache_default_acl(dir); |
2a7dba39 | 653 | retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); |
57fe60df JM |
654 | if (retval < 0) { |
655 | drop_new_inode(inode); | |
656 | return retval; | |
657 | } | |
658 | jbegin_count += retval; | |
bd4c625c | 659 | reiserfs_write_lock(dir->i_sb); |
1da177e4 | 660 | |
bd4c625c LT |
661 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
662 | if (retval) { | |
663 | drop_new_inode(inode); | |
664 | goto out_failed; | |
665 | } | |
666 | ||
667 | retval = | |
668 | reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry, | |
57fe60df | 669 | inode, &security); |
bd4c625c LT |
670 | if (retval) |
671 | goto out_failed; | |
672 | ||
bd4c625c LT |
673 | inode->i_op = &reiserfs_file_inode_operations; |
674 | inode->i_fop = &reiserfs_file_operations; | |
675 | inode->i_mapping->a_ops = &reiserfs_address_space_operations; | |
676 | ||
677 | retval = | |
678 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
679 | dentry->d_name.len, inode, 1 /*visible */ ); | |
680 | if (retval) { | |
681 | int err; | |
6d6b77f1 | 682 | drop_nlink(inode); |
bd4c625c | 683 | reiserfs_update_sd(&th, inode); |
58d85426 | 684 | err = journal_end(&th); |
bd4c625c LT |
685 | if (err) |
686 | retval = err; | |
c1eaa26b | 687 | unlock_new_inode(inode); |
bd4c625c LT |
688 | iput(inode); |
689 | goto out_failed; | |
690 | } | |
691 | reiserfs_update_inode_transaction(inode); | |
692 | reiserfs_update_inode_transaction(dir); | |
1da177e4 | 693 | |
1e2e547a | 694 | d_instantiate_new(dentry, inode); |
58d85426 | 695 | retval = journal_end(&th); |
1da177e4 | 696 | |
cf776a7a | 697 | out_failed: |
bd4c625c LT |
698 | reiserfs_write_unlock(dir->i_sb); |
699 | return retval; | |
700 | } | |
1da177e4 | 701 | |
549c7297 CB |
702 | static int reiserfs_mknod(struct user_namespace *mnt_userns, struct inode *dir, |
703 | struct dentry *dentry, umode_t mode, dev_t rdev) | |
bd4c625c LT |
704 | { |
705 | int retval; | |
706 | struct inode *inode; | |
707 | struct reiserfs_transaction_handle th; | |
57fe60df | 708 | struct reiserfs_security_handle security; |
098297b2 JM |
709 | /* |
710 | * We need blocks for transaction + (user+group)*(quotas | |
711 | * for new inode + update of quota for directory owner) | |
712 | */ | |
bd4c625c LT |
713 | int jbegin_count = |
714 | JOURNAL_PER_BALANCE_CNT * 3 + | |
715 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
716 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
bd4c625c | 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 | |
1e2e547a | 777 | d_instantiate_new(dentry, inode); |
58d85426 | 778 | retval = journal_end(&th); |
1da177e4 | 779 | |
cf776a7a | 780 | out_failed: |
bd4c625c LT |
781 | reiserfs_write_unlock(dir->i_sb); |
782 | return retval; | |
1da177e4 LT |
783 | } |
784 | ||
549c7297 CB |
785 | static int reiserfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, |
786 | 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 | ||
5404e7e0 CIK |
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, | |
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 | ||
1e2e547a | 877 | d_instantiate_new(dentry, inode); |
58d85426 | 878 | retval = journal_end(&th); |
b10ab4c3 | 879 | out_failed: |
278f6679 | 880 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c | 881 | return retval; |
1da177e4 LT |
882 | } |
883 | ||
bd4c625c | 884 | static inline int reiserfs_empty_dir(struct inode *inode) |
1da177e4 | 885 | { |
098297b2 JM |
886 | /* |
887 | * we can cheat because an old format dir cannot have | |
888 | * EMPTY_DIR_SIZE, and a new format dir cannot have | |
889 | * EMPTY_DIR_SIZE_V1. So, if the inode is either size, | |
890 | * regardless of disk format version, the directory is empty. | |
bd4c625c LT |
891 | */ |
892 | if (inode->i_size != EMPTY_DIR_SIZE && | |
893 | inode->i_size != EMPTY_DIR_SIZE_V1) { | |
894 | return 0; | |
895 | } | |
896 | return 1; | |
1da177e4 LT |
897 | } |
898 | ||
bd4c625c | 899 | static int reiserfs_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 | 900 | { |
bd4c625c LT |
901 | int retval, err; |
902 | struct inode *inode; | |
903 | struct reiserfs_transaction_handle th; | |
904 | int jbegin_count; | |
905 | INITIALIZE_PATH(path); | |
906 | struct reiserfs_dir_entry de; | |
907 | ||
098297b2 JM |
908 | /* |
909 | * we will be doing 2 balancings and update 2 stat data, we | |
910 | * change quotas of the owner of the directory and of the owner | |
911 | * of the parent directory. The quota structure is possibly | |
912 | * deleted only on last iput => outside of this transaction | |
913 | */ | |
bd4c625c LT |
914 | jbegin_count = |
915 | JOURNAL_PER_BALANCE_CNT * 2 + 2 + | |
916 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
917 | ||
2e6c97ea JK |
918 | retval = dquot_initialize(dir); |
919 | if (retval) | |
920 | return retval; | |
907f4554 | 921 | |
bd4c625c LT |
922 | reiserfs_write_lock(dir->i_sb); |
923 | retval = journal_begin(&th, dir->i_sb, jbegin_count); | |
924 | if (retval) | |
925 | goto out_rmdir; | |
926 | ||
927 | de.de_gen_number_bit_string = NULL; | |
928 | if ((retval = | |
929 | reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, | |
930 | &path, &de)) == NAME_NOT_FOUND) { | |
931 | retval = -ENOENT; | |
932 | goto end_rmdir; | |
933 | } else if (retval == IO_ERROR) { | |
934 | retval = -EIO; | |
935 | goto end_rmdir; | |
936 | } | |
937 | ||
2b0143b5 | 938 | inode = d_inode(dentry); |
bd4c625c LT |
939 | |
940 | reiserfs_update_inode_transaction(inode); | |
941 | reiserfs_update_inode_transaction(dir); | |
942 | ||
943 | if (de.de_objectid != inode->i_ino) { | |
098297b2 JM |
944 | /* |
945 | * FIXME: compare key of an object and a key found in the entry | |
946 | */ | |
bd4c625c LT |
947 | retval = -EIO; |
948 | goto end_rmdir; | |
949 | } | |
950 | if (!reiserfs_empty_dir(inode)) { | |
951 | retval = -ENOTEMPTY; | |
952 | goto end_rmdir; | |
953 | } | |
954 | ||
955 | /* cut entry from dir directory */ | |
a228bf8f JM |
956 | retval = reiserfs_cut_from_item(&th, &path, &de.de_entry_key, |
957 | dir, NULL, /* page */ | |
bd4c625c LT |
958 | 0 /*new file size - not used here */ ); |
959 | if (retval < 0) | |
960 | goto end_rmdir; | |
961 | ||
962 | if (inode->i_nlink != 2 && inode->i_nlink != 1) | |
0030b645 JM |
963 | reiserfs_error(inode->i_sb, "reiserfs-7040", |
964 | "empty directory has nlink != 2 (%d)", | |
965 | inode->i_nlink); | |
bd4c625c | 966 | |
ce71ec36 | 967 | clear_nlink(inode); |
02027d42 | 968 | inode->i_ctime = dir->i_ctime = dir->i_mtime = current_time(dir); |
bd4c625c LT |
969 | reiserfs_update_sd(&th, inode); |
970 | ||
971 | DEC_DIR_INODE_NLINK(dir) | |
5404e7e0 | 972 | dir->i_size -= (DEH_SIZE + de.de_entrylen); |
bd4c625c LT |
973 | reiserfs_update_sd(&th, dir); |
974 | ||
975 | /* prevent empty directory from getting lost */ | |
976 | add_save_link(&th, inode, 0 /* not truncate */ ); | |
977 | ||
58d85426 | 978 | retval = journal_end(&th); |
bd4c625c | 979 | reiserfs_check_path(&path); |
cf776a7a | 980 | out_rmdir: |
bd4c625c LT |
981 | reiserfs_write_unlock(dir->i_sb); |
982 | return retval; | |
983 | ||
cf776a7a | 984 | end_rmdir: |
098297b2 JM |
985 | /* |
986 | * we must release path, because we did not call | |
987 | * reiserfs_cut_from_item, or reiserfs_cut_from_item does not | |
988 | * release path if operation was not complete | |
989 | */ | |
bd4c625c | 990 | pathrelse(&path); |
58d85426 | 991 | err = journal_end(&th); |
bd4c625c LT |
992 | reiserfs_write_unlock(dir->i_sb); |
993 | return err ? err : retval; | |
1da177e4 LT |
994 | } |
995 | ||
bd4c625c | 996 | static int reiserfs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 | 997 | { |
bd4c625c LT |
998 | int retval, err; |
999 | struct inode *inode; | |
1000 | struct reiserfs_dir_entry de; | |
1001 | INITIALIZE_PATH(path); | |
1002 | struct reiserfs_transaction_handle th; | |
1003 | int jbegin_count; | |
1004 | unsigned long savelink; | |
1005 | ||
2e6c97ea JK |
1006 | retval = dquot_initialize(dir); |
1007 | if (retval) | |
1008 | return retval; | |
907f4554 | 1009 | |
2b0143b5 | 1010 | inode = d_inode(dentry); |
bd4c625c | 1011 | |
098297b2 JM |
1012 | /* |
1013 | * in this transaction we can be doing at max two balancings and | |
1014 | * update two stat datas, we change quotas of the owner of the | |
1015 | * directory and of the owner of the parent directory. The quota | |
1016 | * structure is possibly deleted only on iput => outside of | |
1017 | * this transaction | |
1018 | */ | |
bd4c625c LT |
1019 | jbegin_count = |
1020 | JOURNAL_PER_BALANCE_CNT * 2 + 2 + | |
1021 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
1022 | ||
278f6679 | 1023 | reiserfs_write_lock(dir->i_sb); |
bd4c625c LT |
1024 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
1025 | if (retval) | |
1026 | goto out_unlink; | |
1027 | ||
1028 | de.de_gen_number_bit_string = NULL; | |
1029 | if ((retval = | |
1030 | reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, | |
1031 | &path, &de)) == NAME_NOT_FOUND) { | |
1032 | retval = -ENOENT; | |
1033 | goto end_unlink; | |
1034 | } else if (retval == IO_ERROR) { | |
1035 | retval = -EIO; | |
1036 | goto end_unlink; | |
1037 | } | |
1038 | ||
1039 | reiserfs_update_inode_transaction(inode); | |
1040 | reiserfs_update_inode_transaction(dir); | |
1041 | ||
1042 | if (de.de_objectid != inode->i_ino) { | |
098297b2 JM |
1043 | /* |
1044 | * FIXME: compare key of an object and a key found in the entry | |
1045 | */ | |
bd4c625c LT |
1046 | retval = -EIO; |
1047 | goto end_unlink; | |
1048 | } | |
1049 | ||
1050 | if (!inode->i_nlink) { | |
45b03d5e JM |
1051 | reiserfs_warning(inode->i_sb, "reiserfs-7042", |
1052 | "deleting nonexistent file (%lu), %d", | |
1053 | inode->i_ino, inode->i_nlink); | |
bfe86848 | 1054 | set_nlink(inode, 1); |
bd4c625c LT |
1055 | } |
1056 | ||
9a53c3a7 | 1057 | drop_nlink(inode); |
bd4c625c LT |
1058 | |
1059 | /* | |
1060 | * we schedule before doing the add_save_link call, save the link | |
1061 | * count so we don't race | |
1062 | */ | |
1063 | savelink = inode->i_nlink; | |
1064 | ||
1065 | retval = | |
a228bf8f | 1066 | reiserfs_cut_from_item(&th, &path, &de.de_entry_key, dir, NULL, |
bd4c625c LT |
1067 | 0); |
1068 | if (retval < 0) { | |
d8c76e6f | 1069 | inc_nlink(inode); |
bd4c625c LT |
1070 | goto end_unlink; |
1071 | } | |
02027d42 | 1072 | inode->i_ctime = current_time(inode); |
bd4c625c LT |
1073 | reiserfs_update_sd(&th, inode); |
1074 | ||
1075 | dir->i_size -= (de.de_entrylen + DEH_SIZE); | |
02027d42 | 1076 | dir->i_ctime = dir->i_mtime = current_time(dir); |
bd4c625c LT |
1077 | reiserfs_update_sd(&th, dir); |
1078 | ||
1079 | if (!savelink) | |
1080 | /* prevent file from getting lost */ | |
1081 | add_save_link(&th, inode, 0 /* not truncate */ ); | |
1082 | ||
58d85426 | 1083 | retval = journal_end(&th); |
bd4c625c | 1084 | reiserfs_check_path(&path); |
278f6679 | 1085 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c LT |
1086 | return retval; |
1087 | ||
cf776a7a | 1088 | end_unlink: |
bd4c625c | 1089 | pathrelse(&path); |
58d85426 | 1090 | err = journal_end(&th); |
bd4c625c | 1091 | reiserfs_check_path(&path); |
1da177e4 | 1092 | if (err) |
bd4c625c | 1093 | retval = err; |
cf776a7a | 1094 | out_unlink: |
278f6679 | 1095 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c | 1096 | return retval; |
1da177e4 LT |
1097 | } |
1098 | ||
549c7297 CB |
1099 | static int reiserfs_symlink(struct user_namespace *mnt_userns, |
1100 | struct inode *parent_dir, struct dentry *dentry, | |
1101 | 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; | |
21fc61c7 | 1176 | inode_nohighmem(inode); |
bd4c625c LT |
1177 | inode->i_mapping->a_ops = &reiserfs_address_space_operations; |
1178 | ||
bd4c625c LT |
1179 | retval = reiserfs_add_entry(&th, parent_dir, dentry->d_name.name, |
1180 | dentry->d_name.len, inode, 1 /*visible */ ); | |
1181 | if (retval) { | |
1182 | int err; | |
6d6b77f1 | 1183 | drop_nlink(inode); |
bd4c625c | 1184 | reiserfs_update_sd(&th, inode); |
58d85426 | 1185 | err = journal_end(&th); |
bd4c625c LT |
1186 | if (err) |
1187 | retval = err; | |
c1eaa26b | 1188 | unlock_new_inode(inode); |
bd4c625c LT |
1189 | iput(inode); |
1190 | goto out_failed; | |
1191 | } | |
1da177e4 | 1192 | |
1e2e547a | 1193 | d_instantiate_new(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 | ||
02027d42 | 1251 | inode->i_ctime = current_time(inode); |
bd4c625c LT |
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 | */ |
549c7297 CB |
1310 | static int reiserfs_rename(struct user_namespace *mnt_userns, |
1311 | struct inode *old_dir, struct dentry *old_dentry, | |
f03b8ad8 MS |
1312 | struct inode *new_dir, struct dentry *new_dentry, |
1313 | unsigned int flags) | |
1da177e4 | 1314 | { |
bd4c625c LT |
1315 | int retval; |
1316 | INITIALIZE_PATH(old_entry_path); | |
1317 | INITIALIZE_PATH(new_entry_path); | |
1318 | INITIALIZE_PATH(dot_dot_entry_path); | |
1319 | struct item_head new_entry_ih, old_entry_ih, dot_dot_ih; | |
1320 | struct reiserfs_dir_entry old_de, new_de, dot_dot_de; | |
1321 | struct inode *old_inode, *new_dentry_inode; | |
1322 | struct reiserfs_transaction_handle th; | |
1323 | int jbegin_count; | |
1324 | umode_t old_inode_mode; | |
1325 | unsigned long savelink = 1; | |
95582b00 | 1326 | struct timespec64 ctime; |
bd4c625c | 1327 | |
f03b8ad8 MS |
1328 | if (flags & ~RENAME_NOREPLACE) |
1329 | return -EINVAL; | |
1330 | ||
098297b2 JM |
1331 | /* |
1332 | * three balancings: (1) old name removal, (2) new name insertion | |
1333 | * and (3) maybe "save" link insertion | |
1334 | * stat data updates: (1) old directory, | |
1335 | * (2) new directory and (3) maybe old object stat data (when it is | |
1336 | * directory) and (4) maybe stat data of object to which new entry | |
1337 | * pointed initially and (5) maybe block containing ".." of | |
1338 | * renamed directory | |
1339 | * quota updates: two parent directories | |
1340 | */ | |
bd4c625c LT |
1341 | jbegin_count = |
1342 | JOURNAL_PER_BALANCE_CNT * 3 + 5 + | |
1343 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(old_dir->i_sb); | |
1344 | ||
2e6c97ea JK |
1345 | retval = dquot_initialize(old_dir); |
1346 | if (retval) | |
1347 | return retval; | |
1348 | retval = dquot_initialize(new_dir); | |
1349 | if (retval) | |
1350 | return retval; | |
907f4554 | 1351 | |
2b0143b5 DH |
1352 | old_inode = d_inode(old_dentry); |
1353 | new_dentry_inode = d_inode(new_dentry); | |
bd4c625c | 1354 | |
098297b2 JM |
1355 | /* |
1356 | * make sure that oldname still exists and points to an object we | |
1357 | * are going to rename | |
1358 | */ | |
bd4c625c LT |
1359 | old_de.de_gen_number_bit_string = NULL; |
1360 | reiserfs_write_lock(old_dir->i_sb); | |
1361 | retval = | |
1362 | reiserfs_find_entry(old_dir, old_dentry->d_name.name, | |
1363 | old_dentry->d_name.len, &old_entry_path, | |
1364 | &old_de); | |
1365 | pathrelse(&old_entry_path); | |
1366 | if (retval == IO_ERROR) { | |
1da177e4 | 1367 | reiserfs_write_unlock(old_dir->i_sb); |
bd4c625c | 1368 | return -EIO; |
1da177e4 | 1369 | } |
bd4c625c LT |
1370 | |
1371 | if (retval != NAME_FOUND || old_de.de_objectid != old_inode->i_ino) { | |
1372 | reiserfs_write_unlock(old_dir->i_sb); | |
1373 | return -ENOENT; | |
1da177e4 LT |
1374 | } |
1375 | ||
bd4c625c LT |
1376 | old_inode_mode = old_inode->i_mode; |
1377 | if (S_ISDIR(old_inode_mode)) { | |
098297b2 JM |
1378 | /* |
1379 | * make sure that directory being renamed has correct ".." | |
1380 | * and that its new parent directory has not too many links | |
1381 | * already | |
1382 | */ | |
bd4c625c LT |
1383 | if (new_dentry_inode) { |
1384 | if (!reiserfs_empty_dir(new_dentry_inode)) { | |
1385 | reiserfs_write_unlock(old_dir->i_sb); | |
1386 | return -ENOTEMPTY; | |
1387 | } | |
1388 | } | |
1389 | ||
098297b2 JM |
1390 | /* |
1391 | * directory is renamed, its parent directory will be changed, | |
1392 | * so find ".." entry | |
bd4c625c LT |
1393 | */ |
1394 | dot_dot_de.de_gen_number_bit_string = NULL; | |
1395 | retval = | |
1396 | reiserfs_find_entry(old_inode, "..", 2, &dot_dot_entry_path, | |
1397 | &dot_dot_de); | |
1398 | pathrelse(&dot_dot_entry_path); | |
1399 | if (retval != NAME_FOUND) { | |
1400 | reiserfs_write_unlock(old_dir->i_sb); | |
1401 | return -EIO; | |
1402 | } | |
1403 | ||
1404 | /* inode number of .. must equal old_dir->i_ino */ | |
1405 | if (dot_dot_de.de_objectid != old_dir->i_ino) { | |
1406 | reiserfs_write_unlock(old_dir->i_sb); | |
1407 | return -EIO; | |
1408 | } | |
1da177e4 | 1409 | } |
bd4c625c LT |
1410 | |
1411 | retval = journal_begin(&th, old_dir->i_sb, jbegin_count); | |
1412 | if (retval) { | |
1413 | reiserfs_write_unlock(old_dir->i_sb); | |
1414 | return retval; | |
1da177e4 | 1415 | } |
bd4c625c LT |
1416 | |
1417 | /* add new entry (or find the existing one) */ | |
1418 | retval = | |
1419 | reiserfs_add_entry(&th, new_dir, new_dentry->d_name.name, | |
1420 | new_dentry->d_name.len, old_inode, 0); | |
1421 | if (retval == -EEXIST) { | |
1422 | if (!new_dentry_inode) { | |
c3a9c210 JM |
1423 | reiserfs_panic(old_dir->i_sb, "vs-7050", |
1424 | "new entry is found, new inode == 0"); | |
bd4c625c LT |
1425 | } |
1426 | } else if (retval) { | |
58d85426 | 1427 | int err = journal_end(&th); |
bd4c625c LT |
1428 | reiserfs_write_unlock(old_dir->i_sb); |
1429 | return err ? err : retval; | |
1da177e4 LT |
1430 | } |
1431 | ||
bd4c625c LT |
1432 | reiserfs_update_inode_transaction(old_dir); |
1433 | reiserfs_update_inode_transaction(new_dir); | |
1434 | ||
098297b2 JM |
1435 | /* |
1436 | * this makes it so an fsync on an open fd for the old name will | |
1437 | * commit the rename operation | |
bd4c625c LT |
1438 | */ |
1439 | reiserfs_update_inode_transaction(old_inode); | |
1440 | ||
1441 | if (new_dentry_inode) | |
1442 | reiserfs_update_inode_transaction(new_dentry_inode); | |
1443 | ||
1444 | while (1) { | |
098297b2 JM |
1445 | /* |
1446 | * look for old name using corresponding entry key | |
1447 | * (found by reiserfs_find_entry) | |
1448 | */ | |
bd4c625c LT |
1449 | if ((retval = |
1450 | search_by_entry_key(new_dir->i_sb, &old_de.de_entry_key, | |
1451 | &old_entry_path, | |
1452 | &old_de)) != NAME_FOUND) { | |
1453 | pathrelse(&old_entry_path); | |
58d85426 | 1454 | journal_end(&th); |
bd4c625c LT |
1455 | reiserfs_write_unlock(old_dir->i_sb); |
1456 | return -EIO; | |
1457 | } | |
1458 | ||
4cf5f7ad | 1459 | copy_item_head(&old_entry_ih, tp_item_head(&old_entry_path)); |
bd4c625c LT |
1460 | |
1461 | reiserfs_prepare_for_journal(old_inode->i_sb, old_de.de_bh, 1); | |
1462 | ||
098297b2 | 1463 | /* look for new name by reiserfs_find_entry */ |
bd4c625c LT |
1464 | new_de.de_gen_number_bit_string = NULL; |
1465 | retval = | |
1466 | reiserfs_find_entry(new_dir, new_dentry->d_name.name, | |
1467 | new_dentry->d_name.len, &new_entry_path, | |
1468 | &new_de); | |
098297b2 JM |
1469 | /* |
1470 | * reiserfs_add_entry should not return IO_ERROR, | |
1471 | * because it is called with essentially same parameters from | |
1472 | * reiserfs_add_entry above, and we'll catch any i/o errors | |
1473 | * before we get here. | |
1474 | */ | |
bd4c625c LT |
1475 | if (retval != NAME_FOUND_INVISIBLE && retval != NAME_FOUND) { |
1476 | pathrelse(&new_entry_path); | |
1477 | pathrelse(&old_entry_path); | |
58d85426 | 1478 | journal_end(&th); |
bd4c625c LT |
1479 | reiserfs_write_unlock(old_dir->i_sb); |
1480 | return -EIO; | |
1481 | } | |
1482 | ||
4cf5f7ad | 1483 | copy_item_head(&new_entry_ih, tp_item_head(&new_entry_path)); |
bd4c625c LT |
1484 | |
1485 | reiserfs_prepare_for_journal(old_inode->i_sb, new_de.de_bh, 1); | |
1486 | ||
1487 | if (S_ISDIR(old_inode->i_mode)) { | |
1488 | if ((retval = | |
1489 | search_by_entry_key(new_dir->i_sb, | |
1490 | &dot_dot_de.de_entry_key, | |
1491 | &dot_dot_entry_path, | |
1492 | &dot_dot_de)) != NAME_FOUND) { | |
1493 | pathrelse(&dot_dot_entry_path); | |
1494 | pathrelse(&new_entry_path); | |
1495 | pathrelse(&old_entry_path); | |
58d85426 | 1496 | journal_end(&th); |
bd4c625c LT |
1497 | reiserfs_write_unlock(old_dir->i_sb); |
1498 | return -EIO; | |
1499 | } | |
1500 | copy_item_head(&dot_dot_ih, | |
4cf5f7ad | 1501 | tp_item_head(&dot_dot_entry_path)); |
098297b2 | 1502 | /* node containing ".." gets into transaction */ |
bd4c625c LT |
1503 | reiserfs_prepare_for_journal(old_inode->i_sb, |
1504 | dot_dot_de.de_bh, 1); | |
1505 | } | |
098297b2 JM |
1506 | /* |
1507 | * we should check seals here, not do | |
1508 | * this stuff, yes? Then, having | |
1509 | * gathered everything into RAM we | |
1510 | * should lock the buffers, yes? -Hans | |
1511 | */ | |
1512 | /* | |
1513 | * probably. our rename needs to hold more | |
1514 | * than one path at once. The seals would | |
1515 | * have to be written to deal with multi-path | |
1516 | * issues -chris | |
bd4c625c | 1517 | */ |
098297b2 JM |
1518 | /* |
1519 | * sanity checking before doing the rename - avoid races many | |
1520 | * of the above checks could have scheduled. We have to be | |
1521 | * sure our items haven't been shifted by another process. | |
bd4c625c LT |
1522 | */ |
1523 | if (item_moved(&new_entry_ih, &new_entry_path) || | |
1524 | !entry_points_to_object(new_dentry->d_name.name, | |
1525 | new_dentry->d_name.len, | |
1526 | &new_de, new_dentry_inode) || | |
1527 | item_moved(&old_entry_ih, &old_entry_path) || | |
1528 | !entry_points_to_object(old_dentry->d_name.name, | |
1529 | old_dentry->d_name.len, | |
1530 | &old_de, old_inode)) { | |
1531 | reiserfs_restore_prepared_buffer(old_inode->i_sb, | |
1532 | new_de.de_bh); | |
1533 | reiserfs_restore_prepared_buffer(old_inode->i_sb, | |
1534 | old_de.de_bh); | |
1535 | if (S_ISDIR(old_inode_mode)) | |
1536 | reiserfs_restore_prepared_buffer(old_inode-> | |
1537 | i_sb, | |
1538 | dot_dot_de. | |
1539 | de_bh); | |
1540 | continue; | |
1541 | } | |
1542 | if (S_ISDIR(old_inode_mode)) { | |
1543 | if (item_moved(&dot_dot_ih, &dot_dot_entry_path) || | |
1544 | !entry_points_to_object("..", 2, &dot_dot_de, | |
1545 | old_dir)) { | |
1546 | reiserfs_restore_prepared_buffer(old_inode-> | |
1547 | i_sb, | |
1548 | old_de.de_bh); | |
1549 | reiserfs_restore_prepared_buffer(old_inode-> | |
1550 | i_sb, | |
1551 | new_de.de_bh); | |
1552 | reiserfs_restore_prepared_buffer(old_inode-> | |
1553 | i_sb, | |
1554 | dot_dot_de. | |
1555 | de_bh); | |
1556 | continue; | |
1557 | } | |
1558 | } | |
1559 | ||
1560 | RFALSE(S_ISDIR(old_inode_mode) && | |
1561 | !buffer_journal_prepared(dot_dot_de.de_bh), ""); | |
1562 | ||
1563 | break; | |
1da177e4 LT |
1564 | } |
1565 | ||
098297b2 JM |
1566 | /* |
1567 | * ok, all the changes can be done in one fell swoop when we | |
1568 | * have claimed all the buffers needed. | |
1569 | */ | |
1da177e4 | 1570 | |
bd4c625c LT |
1571 | mark_de_visible(new_de.de_deh + new_de.de_entry_num); |
1572 | set_ino_in_dir_entry(&new_de, INODE_PKEY(old_inode)); | |
09f1b80b | 1573 | journal_mark_dirty(&th, new_de.de_bh); |
1da177e4 | 1574 | |
bd4c625c | 1575 | mark_de_hidden(old_de.de_deh + old_de.de_entry_num); |
09f1b80b | 1576 | journal_mark_dirty(&th, old_de.de_bh); |
02027d42 | 1577 | ctime = current_time(old_dir); |
bd4c625c LT |
1578 | old_dir->i_ctime = old_dir->i_mtime = ctime; |
1579 | new_dir->i_ctime = new_dir->i_mtime = ctime; | |
098297b2 JM |
1580 | /* |
1581 | * thanks to Alex Adriaanse <alex_a@caltech.edu> for patch | |
1582 | * which adds ctime update of renamed object | |
1583 | */ | |
bd4c625c LT |
1584 | old_inode->i_ctime = ctime; |
1585 | ||
1586 | if (new_dentry_inode) { | |
098297b2 | 1587 | /* adjust link number of the victim */ |
bd4c625c | 1588 | if (S_ISDIR(new_dentry_inode->i_mode)) { |
ce71ec36 | 1589 | clear_nlink(new_dentry_inode); |
bd4c625c | 1590 | } else { |
9a53c3a7 | 1591 | drop_nlink(new_dentry_inode); |
bd4c625c LT |
1592 | } |
1593 | new_dentry_inode->i_ctime = ctime; | |
1594 | savelink = new_dentry_inode->i_nlink; | |
1da177e4 | 1595 | } |
bd4c625c | 1596 | |
1da177e4 | 1597 | if (S_ISDIR(old_inode_mode)) { |
0222e657 | 1598 | /* adjust ".." of renamed directory */ |
bd4c625c | 1599 | set_ino_in_dir_entry(&dot_dot_de, INODE_PKEY(new_dir)); |
09f1b80b | 1600 | journal_mark_dirty(&th, dot_dot_de.de_bh); |
bd4c625c | 1601 | |
098297b2 JM |
1602 | /* |
1603 | * there (in new_dir) was no directory, so it got new link | |
1604 | * (".." of renamed directory) | |
1605 | */ | |
bd4c625c | 1606 | if (!new_dentry_inode) |
bd4c625c LT |
1607 | INC_DIR_INODE_NLINK(new_dir); |
1608 | ||
1609 | /* old directory lost one link - ".. " of renamed directory */ | |
1610 | DEC_DIR_INODE_NLINK(old_dir); | |
1da177e4 | 1611 | } |
098297b2 JM |
1612 | /* |
1613 | * looks like in 2.3.99pre3 brelse is atomic. | |
1614 | * so we can use pathrelse | |
1615 | */ | |
bd4c625c LT |
1616 | pathrelse(&new_entry_path); |
1617 | pathrelse(&dot_dot_entry_path); | |
1da177e4 | 1618 | |
098297b2 JM |
1619 | /* |
1620 | * FIXME: this reiserfs_cut_from_item's return value may screw up | |
1621 | * anybody, but it will panic if will not be able to find the | |
1622 | * entry. This needs one more clean up | |
1623 | */ | |
bd4c625c | 1624 | if (reiserfs_cut_from_item |
a228bf8f | 1625 | (&th, &old_entry_path, &old_de.de_entry_key, old_dir, NULL, |
bd4c625c | 1626 | 0) < 0) |
0030b645 JM |
1627 | reiserfs_error(old_dir->i_sb, "vs-7060", |
1628 | "couldn't not cut old name. Fsck later?"); | |
bd4c625c LT |
1629 | |
1630 | old_dir->i_size -= DEH_SIZE + old_de.de_entrylen; | |
1631 | ||
1632 | reiserfs_update_sd(&th, old_dir); | |
1633 | reiserfs_update_sd(&th, new_dir); | |
1634 | reiserfs_update_sd(&th, old_inode); | |
1635 | ||
1636 | if (new_dentry_inode) { | |
1637 | if (savelink == 0) | |
1638 | add_save_link(&th, new_dentry_inode, | |
1639 | 0 /* not truncate */ ); | |
1640 | reiserfs_update_sd(&th, new_dentry_inode); | |
1da177e4 | 1641 | } |
bd4c625c | 1642 | |
58d85426 | 1643 | retval = journal_end(&th); |
bd4c625c LT |
1644 | reiserfs_write_unlock(old_dir->i_sb); |
1645 | return retval; | |
1da177e4 LT |
1646 | } |
1647 | ||
098297b2 | 1648 | /* directories can handle most operations... */ |
c5ef1c42 | 1649 | const struct inode_operations reiserfs_dir_inode_operations = { |
bd4c625c LT |
1650 | .create = reiserfs_create, |
1651 | .lookup = reiserfs_lookup, | |
1652 | .link = reiserfs_link, | |
1653 | .unlink = reiserfs_unlink, | |
1654 | .symlink = reiserfs_symlink, | |
1655 | .mkdir = reiserfs_mkdir, | |
1656 | .rmdir = reiserfs_rmdir, | |
1657 | .mknod = reiserfs_mknod, | |
1658 | .rename = reiserfs_rename, | |
1659 | .setattr = reiserfs_setattr, | |
bd4c625c | 1660 | .listxattr = reiserfs_listxattr, |
bd4c625c | 1661 | .permission = reiserfs_permission, |
4e34e719 | 1662 | .get_acl = reiserfs_get_acl, |
47f70d08 | 1663 | .set_acl = reiserfs_set_acl, |
03eb6066 MS |
1664 | .fileattr_get = reiserfs_fileattr_get, |
1665 | .fileattr_set = reiserfs_fileattr_set, | |
1da177e4 LT |
1666 | }; |
1667 | ||
1668 | /* | |
1669 | * symlink operations.. same as page_symlink_inode_operations, with xattr | |
1670 | * stuff added | |
1671 | */ | |
c5ef1c42 | 1672 | const struct inode_operations reiserfs_symlink_inode_operations = { |
6b255391 | 1673 | .get_link = page_get_link, |
bd4c625c | 1674 | .setattr = reiserfs_setattr, |
bd4c625c | 1675 | .listxattr = reiserfs_listxattr, |
bd4c625c | 1676 | .permission = reiserfs_permission, |
1da177e4 LT |
1677 | }; |
1678 | ||
1da177e4 LT |
1679 | /* |
1680 | * special file operations.. just xattr/acl stuff | |
1681 | */ | |
c5ef1c42 | 1682 | const struct inode_operations reiserfs_special_inode_operations = { |
bd4c625c | 1683 | .setattr = reiserfs_setattr, |
bd4c625c | 1684 | .listxattr = reiserfs_listxattr, |
bd4c625c | 1685 | .permission = reiserfs_permission, |
4e34e719 | 1686 | .get_acl = reiserfs_get_acl, |
47f70d08 | 1687 | .set_acl = reiserfs_set_acl, |
1da177e4 | 1688 | }; |