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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 | |
60e4cf67 JM |
380 | * in the priv tree. Also clear IOP_XATTR |
381 | * since we don't have xattrs on xattr files. | |
098297b2 | 382 | */ |
60e4cf67 | 383 | if (IS_PRIVATE(dir)) { |
6dfede69 | 384 | inode->i_flags |= S_PRIVATE; |
60e4cf67 JM |
385 | inode->i_opflags &= ~IOP_XATTR; |
386 | } | |
bd4c625c | 387 | } |
278f6679 | 388 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c LT |
389 | if (retval == IO_ERROR) { |
390 | return ERR_PTR(-EIO); | |
1da177e4 LT |
391 | } |
392 | ||
d9975d6b | 393 | return d_splice_alias(inode, dentry); |
bd4c625c | 394 | } |
1da177e4 | 395 | |
0222e657 | 396 | /* |
098297b2 JM |
397 | * looks up the dentry of the parent directory for child. |
398 | * taken from ext2_get_parent | |
399 | */ | |
1da177e4 LT |
400 | struct dentry *reiserfs_get_parent(struct dentry *child) |
401 | { | |
bd4c625c LT |
402 | int retval; |
403 | struct inode *inode = NULL; | |
404 | struct reiserfs_dir_entry de; | |
405 | INITIALIZE_PATH(path_to_entry); | |
2b0143b5 | 406 | struct inode *dir = d_inode(child); |
bd4c625c LT |
407 | |
408 | if (dir->i_nlink == 0) { | |
409 | return ERR_PTR(-ENOENT); | |
410 | } | |
411 | de.de_gen_number_bit_string = NULL; | |
412 | ||
413 | reiserfs_write_lock(dir->i_sb); | |
414 | retval = reiserfs_find_entry(dir, "..", 2, &path_to_entry, &de); | |
415 | pathrelse(&path_to_entry); | |
416 | if (retval != NAME_FOUND) { | |
417 | reiserfs_write_unlock(dir->i_sb); | |
418 | return ERR_PTR(-ENOENT); | |
419 | } | |
a228bf8f | 420 | inode = reiserfs_iget(dir->i_sb, (struct cpu_key *)&de.de_dir_id); |
1da177e4 | 421 | reiserfs_write_unlock(dir->i_sb); |
1da177e4 | 422 | |
44003728 | 423 | return d_obtain_alias(inode); |
bd4c625c | 424 | } |
1da177e4 | 425 | |
0222e657 | 426 | /* add entry to the directory (entry can be hidden). |
1da177e4 LT |
427 | |
428 | insert definition of when hidden directories are used here -Hans | |
429 | ||
430 | Does not mark dir inode dirty, do it after successesfull call to it */ | |
431 | ||
bd4c625c LT |
432 | static int reiserfs_add_entry(struct reiserfs_transaction_handle *th, |
433 | struct inode *dir, const char *name, int namelen, | |
434 | struct inode *inode, int visible) | |
1da177e4 | 435 | { |
bd4c625c LT |
436 | struct cpu_key entry_key; |
437 | struct reiserfs_de_head *deh; | |
438 | INITIALIZE_PATH(path); | |
439 | struct reiserfs_dir_entry de; | |
3af1efe8 | 440 | DECLARE_BITMAP(bit_string, MAX_GENERATION_NUMBER + 1); |
bd4c625c | 441 | int gen_number; |
098297b2 JM |
442 | |
443 | /* | |
444 | * 48 bytes now and we avoid kmalloc if we | |
445 | * create file with short name | |
446 | */ | |
447 | char small_buf[32 + DEH_SIZE]; | |
448 | ||
bd4c625c LT |
449 | char *buffer; |
450 | int buflen, paste_size; | |
451 | int retval; | |
452 | ||
453 | BUG_ON(!th->t_trans_id); | |
454 | ||
455 | /* cannot allow items to be added into a busy deleted directory */ | |
456 | if (!namelen) | |
457 | return -EINVAL; | |
458 | ||
459 | if (namelen > REISERFS_MAX_NAME(dir->i_sb->s_blocksize)) | |
460 | return -ENAMETOOLONG; | |
461 | ||
462 | /* each entry has unique key. compose it */ | |
463 | make_cpu_key(&entry_key, dir, | |
464 | get_third_component(dir->i_sb, name, namelen), | |
465 | TYPE_DIRENTRY, 3); | |
466 | ||
467 | /* get memory for composing the entry */ | |
468 | buflen = DEH_SIZE + ROUND_UP(namelen); | |
469 | if (buflen > sizeof(small_buf)) { | |
d739b42b | 470 | buffer = kmalloc(buflen, GFP_NOFS); |
9dce07f1 | 471 | if (!buffer) |
bd4c625c LT |
472 | return -ENOMEM; |
473 | } else | |
474 | buffer = small_buf; | |
475 | ||
476 | paste_size = | |
477 | (get_inode_sd_version(dir) == | |
478 | STAT_DATA_V1) ? (DEH_SIZE + namelen) : buflen; | |
479 | ||
098297b2 JM |
480 | /* |
481 | * fill buffer : directory entry head, name[, dir objectid | , | |
482 | * stat data | ,stat data, dir objectid ] | |
483 | */ | |
bd4c625c LT |
484 | deh = (struct reiserfs_de_head *)buffer; |
485 | deh->deh_location = 0; /* JDM Endian safe if 0 */ | |
486 | put_deh_offset(deh, cpu_key_k_offset(&entry_key)); | |
487 | deh->deh_state = 0; /* JDM Endian safe if 0 */ | |
488 | /* put key (ino analog) to de */ | |
098297b2 JM |
489 | |
490 | /* safe: k_dir_id is le */ | |
491 | deh->deh_dir_id = INODE_PKEY(inode)->k_dir_id; | |
492 | /* safe: k_objectid is le */ | |
493 | deh->deh_objectid = INODE_PKEY(inode)->k_objectid; | |
bd4c625c LT |
494 | |
495 | /* copy name */ | |
496 | memcpy((char *)(deh + 1), name, namelen); | |
497 | /* padd by 0s to the 4 byte boundary */ | |
498 | padd_item((char *)(deh + 1), ROUND_UP(namelen), namelen); | |
499 | ||
098297b2 JM |
500 | /* |
501 | * entry is ready to be pasted into tree, set 'visibility' | |
502 | * and 'stat data in entry' attributes | |
503 | */ | |
bd4c625c LT |
504 | mark_de_without_sd(deh); |
505 | visible ? mark_de_visible(deh) : mark_de_hidden(deh); | |
506 | ||
507 | /* find the proper place for the new entry */ | |
508 | memset(bit_string, 0, sizeof(bit_string)); | |
3af1efe8 | 509 | de.de_gen_number_bit_string = bit_string; |
bd4c625c LT |
510 | retval = reiserfs_find_entry(dir, name, namelen, &path, &de); |
511 | if (retval != NAME_NOT_FOUND) { | |
512 | if (buffer != small_buf) | |
d739b42b | 513 | kfree(buffer); |
bd4c625c LT |
514 | pathrelse(&path); |
515 | ||
516 | if (retval == IO_ERROR) { | |
517 | return -EIO; | |
518 | } | |
519 | ||
520 | if (retval != NAME_FOUND) { | |
0030b645 JM |
521 | reiserfs_error(dir->i_sb, "zam-7002", |
522 | "reiserfs_find_entry() returned " | |
523 | "unexpected value (%d)", retval); | |
bd4c625c LT |
524 | } |
525 | ||
526 | return -EEXIST; | |
527 | } | |
1da177e4 | 528 | |
bd4c625c | 529 | gen_number = |
3af1efe8 | 530 | find_first_zero_bit(bit_string, |
bd4c625c LT |
531 | MAX_GENERATION_NUMBER + 1); |
532 | if (gen_number > MAX_GENERATION_NUMBER) { | |
533 | /* there is no free generation number */ | |
45b03d5e JM |
534 | reiserfs_warning(dir->i_sb, "reiserfs-7010", |
535 | "Congratulations! we have got hash function " | |
536 | "screwed up"); | |
bd4c625c | 537 | if (buffer != small_buf) |
d739b42b | 538 | kfree(buffer); |
bd4c625c LT |
539 | pathrelse(&path); |
540 | return -EBUSY; | |
541 | } | |
542 | /* adjust offset of directory enrty */ | |
543 | put_deh_offset(deh, SET_GENERATION_NUMBER(deh_offset(deh), gen_number)); | |
544 | set_cpu_key_k_offset(&entry_key, deh_offset(deh)); | |
545 | ||
546 | /* update max-hash-collisions counter in reiserfs_sb_info */ | |
547 | PROC_INFO_MAX(th->t_super, max_hash_collisions, gen_number); | |
548 | ||
098297b2 JM |
549 | /* we need to re-search for the insertion point */ |
550 | if (gen_number != 0) { | |
bd4c625c LT |
551 | if (search_by_entry_key(dir->i_sb, &entry_key, &path, &de) != |
552 | NAME_NOT_FOUND) { | |
45b03d5e JM |
553 | reiserfs_warning(dir->i_sb, "vs-7032", |
554 | "entry with this key (%K) already " | |
555 | "exists", &entry_key); | |
bd4c625c LT |
556 | |
557 | if (buffer != small_buf) | |
d739b42b | 558 | kfree(buffer); |
bd4c625c LT |
559 | pathrelse(&path); |
560 | return -EBUSY; | |
561 | } | |
1da177e4 LT |
562 | } |
563 | ||
bd4c625c LT |
564 | /* perform the insertion of the entry that we have prepared */ |
565 | retval = | |
566 | reiserfs_paste_into_item(th, &path, &entry_key, dir, buffer, | |
567 | paste_size); | |
568 | if (buffer != small_buf) | |
d739b42b | 569 | kfree(buffer); |
bd4c625c LT |
570 | if (retval) { |
571 | reiserfs_check_path(&path); | |
572 | return retval; | |
1da177e4 | 573 | } |
1da177e4 | 574 | |
bd4c625c | 575 | dir->i_size += paste_size; |
02027d42 | 576 | dir->i_mtime = dir->i_ctime = current_time(dir); |
bd4c625c | 577 | if (!S_ISDIR(inode->i_mode) && visible) |
098297b2 | 578 | /* reiserfs_mkdir or reiserfs_rename will do that by itself */ |
bd4c625c | 579 | reiserfs_update_sd(th, dir); |
1da177e4 | 580 | |
bd4c625c LT |
581 | reiserfs_check_path(&path); |
582 | return 0; | |
1da177e4 LT |
583 | } |
584 | ||
098297b2 JM |
585 | /* |
586 | * quota utility function, call if you've had to abort after calling | |
587 | * new_inode_init, and have not called reiserfs_new_inode yet. | |
588 | * This should only be called on inodes that do not have stat data | |
589 | * inserted into the tree yet. | |
590 | */ | |
bd4c625c LT |
591 | static int drop_new_inode(struct inode *inode) |
592 | { | |
9f754758 | 593 | dquot_drop(inode); |
bd4c625c LT |
594 | make_bad_inode(inode); |
595 | inode->i_flags |= S_NOQUOTA; | |
596 | iput(inode); | |
597 | return 0; | |
1da177e4 LT |
598 | } |
599 | ||
098297b2 JM |
600 | /* |
601 | * utility function that does setup for reiserfs_new_inode. | |
602 | * dquot_initialize needs lots of credits so it's better to have it | |
603 | * outside of a transaction, so we had to pull some bits of | |
604 | * reiserfs_new_inode out into this func. | |
605 | */ | |
8e071892 | 606 | static int new_inode_init(struct inode *inode, struct inode *dir, umode_t mode) |
bd4c625c | 607 | { |
098297b2 JM |
608 | /* |
609 | * Make inode invalid - just in case we are going to drop it before | |
610 | * the initialization happens | |
611 | */ | |
1b0a74d1 | 612 | INODE_PKEY(inode)->k_objectid = 0; |
098297b2 JM |
613 | |
614 | /* | |
615 | * the quota init calls have to know who to charge the quota to, so | |
616 | * we have to set uid and gid here | |
04b7ed0d DM |
617 | */ |
618 | inode_init_owner(inode, dir, mode); | |
2e6c97ea | 619 | return dquot_initialize(inode); |
1da177e4 LT |
620 | } |
621 | ||
4acdaf27 | 622 | static int reiserfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 623 | bool excl) |
1da177e4 | 624 | { |
bd4c625c LT |
625 | int retval; |
626 | struct inode *inode; | |
098297b2 JM |
627 | /* |
628 | * We need blocks for transaction + (user+group)*(quotas | |
629 | * for new inode + update of quota for directory owner) | |
630 | */ | |
bd4c625c LT |
631 | int jbegin_count = |
632 | JOURNAL_PER_BALANCE_CNT * 2 + | |
633 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
634 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
635 | struct reiserfs_transaction_handle th; | |
57fe60df | 636 | struct reiserfs_security_handle security; |
bd4c625c | 637 | |
2e6c97ea JK |
638 | retval = dquot_initialize(dir); |
639 | if (retval) | |
640 | return retval; | |
907f4554 | 641 | |
bd4c625c LT |
642 | if (!(inode = new_inode(dir->i_sb))) { |
643 | return -ENOMEM; | |
644 | } | |
2e6c97ea JK |
645 | retval = new_inode_init(inode, dir, mode); |
646 | if (retval) { | |
647 | drop_new_inode(inode); | |
648 | return retval; | |
649 | } | |
1da177e4 | 650 | |
0ab2621e | 651 | jbegin_count += reiserfs_cache_default_acl(dir); |
2a7dba39 | 652 | retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); |
57fe60df JM |
653 | if (retval < 0) { |
654 | drop_new_inode(inode); | |
655 | return retval; | |
656 | } | |
657 | jbegin_count += retval; | |
bd4c625c | 658 | reiserfs_write_lock(dir->i_sb); |
1da177e4 | 659 | |
bd4c625c LT |
660 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
661 | if (retval) { | |
662 | drop_new_inode(inode); | |
663 | goto out_failed; | |
664 | } | |
665 | ||
666 | retval = | |
667 | reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry, | |
57fe60df | 668 | inode, &security); |
bd4c625c LT |
669 | if (retval) |
670 | goto out_failed; | |
671 | ||
bd4c625c LT |
672 | inode->i_op = &reiserfs_file_inode_operations; |
673 | inode->i_fop = &reiserfs_file_operations; | |
674 | inode->i_mapping->a_ops = &reiserfs_address_space_operations; | |
675 | ||
676 | retval = | |
677 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
678 | dentry->d_name.len, inode, 1 /*visible */ ); | |
679 | if (retval) { | |
680 | int err; | |
6d6b77f1 | 681 | drop_nlink(inode); |
bd4c625c | 682 | reiserfs_update_sd(&th, inode); |
58d85426 | 683 | err = journal_end(&th); |
bd4c625c LT |
684 | if (err) |
685 | retval = err; | |
c1eaa26b | 686 | unlock_new_inode(inode); |
bd4c625c LT |
687 | iput(inode); |
688 | goto out_failed; | |
689 | } | |
690 | reiserfs_update_inode_transaction(inode); | |
691 | reiserfs_update_inode_transaction(dir); | |
1da177e4 | 692 | |
1e2e547a | 693 | d_instantiate_new(dentry, inode); |
58d85426 | 694 | retval = journal_end(&th); |
1da177e4 | 695 | |
cf776a7a | 696 | out_failed: |
bd4c625c LT |
697 | reiserfs_write_unlock(dir->i_sb); |
698 | return retval; | |
699 | } | |
1da177e4 | 700 | |
1a67aafb | 701 | static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
bd4c625c LT |
702 | dev_t rdev) |
703 | { | |
704 | int retval; | |
705 | struct inode *inode; | |
706 | struct reiserfs_transaction_handle th; | |
57fe60df | 707 | struct reiserfs_security_handle security; |
098297b2 JM |
708 | /* |
709 | * We need blocks for transaction + (user+group)*(quotas | |
710 | * for new inode + update of quota for directory owner) | |
711 | */ | |
bd4c625c LT |
712 | int jbegin_count = |
713 | JOURNAL_PER_BALANCE_CNT * 3 + | |
714 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
715 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
bd4c625c | 716 | |
2e6c97ea JK |
717 | retval = dquot_initialize(dir); |
718 | if (retval) | |
719 | return retval; | |
907f4554 | 720 | |
bd4c625c LT |
721 | if (!(inode = new_inode(dir->i_sb))) { |
722 | return -ENOMEM; | |
723 | } | |
2e6c97ea JK |
724 | retval = new_inode_init(inode, dir, mode); |
725 | if (retval) { | |
726 | drop_new_inode(inode); | |
727 | return retval; | |
728 | } | |
1da177e4 | 729 | |
0ab2621e | 730 | jbegin_count += reiserfs_cache_default_acl(dir); |
2a7dba39 | 731 | retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); |
57fe60df JM |
732 | if (retval < 0) { |
733 | drop_new_inode(inode); | |
734 | return retval; | |
735 | } | |
736 | jbegin_count += retval; | |
bd4c625c | 737 | reiserfs_write_lock(dir->i_sb); |
1da177e4 | 738 | |
bd4c625c LT |
739 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
740 | if (retval) { | |
741 | drop_new_inode(inode); | |
742 | goto out_failed; | |
743 | } | |
1da177e4 | 744 | |
bd4c625c LT |
745 | retval = |
746 | reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry, | |
57fe60df | 747 | inode, &security); |
bd4c625c LT |
748 | if (retval) { |
749 | goto out_failed; | |
750 | } | |
1da177e4 | 751 | |
bd4c625c LT |
752 | inode->i_op = &reiserfs_special_inode_operations; |
753 | init_special_inode(inode, inode->i_mode, rdev); | |
754 | ||
098297b2 | 755 | /* FIXME: needed for block and char devices only */ |
bd4c625c LT |
756 | reiserfs_update_sd(&th, inode); |
757 | ||
758 | reiserfs_update_inode_transaction(inode); | |
759 | reiserfs_update_inode_transaction(dir); | |
760 | ||
761 | retval = | |
762 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
763 | dentry->d_name.len, inode, 1 /*visible */ ); | |
764 | if (retval) { | |
765 | int err; | |
6d6b77f1 | 766 | drop_nlink(inode); |
bd4c625c | 767 | reiserfs_update_sd(&th, inode); |
58d85426 | 768 | err = journal_end(&th); |
bd4c625c LT |
769 | if (err) |
770 | retval = err; | |
c1eaa26b | 771 | unlock_new_inode(inode); |
bd4c625c LT |
772 | iput(inode); |
773 | goto out_failed; | |
774 | } | |
1da177e4 | 775 | |
1e2e547a | 776 | d_instantiate_new(dentry, inode); |
58d85426 | 777 | retval = journal_end(&th); |
1da177e4 | 778 | |
cf776a7a | 779 | out_failed: |
bd4c625c LT |
780 | reiserfs_write_unlock(dir->i_sb); |
781 | return retval; | |
1da177e4 LT |
782 | } |
783 | ||
18bb1db3 | 784 | static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
1da177e4 | 785 | { |
bd4c625c LT |
786 | int retval; |
787 | struct inode *inode; | |
788 | struct reiserfs_transaction_handle th; | |
57fe60df | 789 | struct reiserfs_security_handle security; |
098297b2 JM |
790 | /* |
791 | * We need blocks for transaction + (user+group)*(quotas | |
792 | * for new inode + update of quota for directory owner) | |
793 | */ | |
bd4c625c LT |
794 | int jbegin_count = |
795 | JOURNAL_PER_BALANCE_CNT * 3 + | |
796 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) + | |
797 | REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb)); | |
1da177e4 | 798 | |
2e6c97ea JK |
799 | retval = dquot_initialize(dir); |
800 | if (retval) | |
801 | return retval; | |
907f4554 | 802 | |
1da177e4 | 803 | #ifdef DISPLACE_NEW_PACKING_LOCALITIES |
098297b2 JM |
804 | /* |
805 | * set flag that new packing locality created and new blocks | |
806 | * for the content of that directory are not displaced yet | |
807 | */ | |
bd4c625c | 808 | REISERFS_I(dir)->new_packing_locality = 1; |
1da177e4 | 809 | #endif |
bd4c625c LT |
810 | mode = S_IFDIR | mode; |
811 | if (!(inode = new_inode(dir->i_sb))) { | |
812 | return -ENOMEM; | |
813 | } | |
2e6c97ea JK |
814 | retval = new_inode_init(inode, dir, mode); |
815 | if (retval) { | |
816 | drop_new_inode(inode); | |
817 | return retval; | |
818 | } | |
bd4c625c | 819 | |
0ab2621e | 820 | jbegin_count += reiserfs_cache_default_acl(dir); |
2a7dba39 | 821 | retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); |
57fe60df JM |
822 | if (retval < 0) { |
823 | drop_new_inode(inode); | |
824 | return retval; | |
825 | } | |
826 | jbegin_count += retval; | |
278f6679 | 827 | reiserfs_write_lock(dir->i_sb); |
bd4c625c LT |
828 | |
829 | retval = journal_begin(&th, dir->i_sb, jbegin_count); | |
830 | if (retval) { | |
831 | drop_new_inode(inode); | |
832 | goto out_failed; | |
833 | } | |
1da177e4 | 834 | |
098297b2 JM |
835 | /* |
836 | * inc the link count now, so another writer doesn't overflow | |
837 | * it while we sleep later on. | |
bd4c625c LT |
838 | */ |
839 | INC_DIR_INODE_NLINK(dir) | |
840 | ||
5404e7e0 CIK |
841 | retval = reiserfs_new_inode(&th, dir, mode, NULL /*symlink */, |
842 | old_format_only(dir->i_sb) ? | |
843 | EMPTY_DIR_SIZE_V1 : EMPTY_DIR_SIZE, | |
844 | dentry, inode, &security); | |
bd4c625c | 845 | if (retval) { |
99890a3b | 846 | DEC_DIR_INODE_NLINK(dir) |
bd4c625c LT |
847 | goto out_failed; |
848 | } | |
849 | ||
bd4c625c LT |
850 | reiserfs_update_inode_transaction(inode); |
851 | reiserfs_update_inode_transaction(dir); | |
852 | ||
853 | inode->i_op = &reiserfs_dir_inode_operations; | |
854 | inode->i_fop = &reiserfs_dir_operations; | |
855 | ||
098297b2 | 856 | /* note, _this_ add_entry will not update dir's stat data */ |
bd4c625c LT |
857 | retval = |
858 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
859 | dentry->d_name.len, inode, 1 /*visible */ ); | |
860 | if (retval) { | |
861 | int err; | |
6d6b77f1 | 862 | clear_nlink(inode); |
bd4c625c LT |
863 | DEC_DIR_INODE_NLINK(dir); |
864 | reiserfs_update_sd(&th, inode); | |
58d85426 | 865 | err = journal_end(&th); |
bd4c625c LT |
866 | if (err) |
867 | retval = err; | |
c1eaa26b | 868 | unlock_new_inode(inode); |
bd4c625c LT |
869 | iput(inode); |
870 | goto out_failed; | |
871 | } | |
098297b2 | 872 | /* the above add_entry did not update dir's stat data */ |
bd4c625c LT |
873 | reiserfs_update_sd(&th, dir); |
874 | ||
1e2e547a | 875 | d_instantiate_new(dentry, inode); |
58d85426 | 876 | retval = journal_end(&th); |
b10ab4c3 | 877 | out_failed: |
278f6679 | 878 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c | 879 | return retval; |
1da177e4 LT |
880 | } |
881 | ||
bd4c625c | 882 | static inline int reiserfs_empty_dir(struct inode *inode) |
1da177e4 | 883 | { |
098297b2 JM |
884 | /* |
885 | * we can cheat because an old format dir cannot have | |
886 | * EMPTY_DIR_SIZE, and a new format dir cannot have | |
887 | * EMPTY_DIR_SIZE_V1. So, if the inode is either size, | |
888 | * regardless of disk format version, the directory is empty. | |
bd4c625c LT |
889 | */ |
890 | if (inode->i_size != EMPTY_DIR_SIZE && | |
891 | inode->i_size != EMPTY_DIR_SIZE_V1) { | |
892 | return 0; | |
893 | } | |
894 | return 1; | |
1da177e4 LT |
895 | } |
896 | ||
bd4c625c | 897 | static int reiserfs_rmdir(struct inode *dir, struct dentry *dentry) |
1da177e4 | 898 | { |
bd4c625c LT |
899 | int retval, err; |
900 | struct inode *inode; | |
901 | struct reiserfs_transaction_handle th; | |
902 | int jbegin_count; | |
903 | INITIALIZE_PATH(path); | |
904 | struct reiserfs_dir_entry de; | |
905 | ||
098297b2 JM |
906 | /* |
907 | * we will be doing 2 balancings and update 2 stat data, we | |
908 | * change quotas of the owner of the directory and of the owner | |
909 | * of the parent directory. The quota structure is possibly | |
910 | * deleted only on last iput => outside of this transaction | |
911 | */ | |
bd4c625c LT |
912 | jbegin_count = |
913 | JOURNAL_PER_BALANCE_CNT * 2 + 2 + | |
914 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
915 | ||
2e6c97ea JK |
916 | retval = dquot_initialize(dir); |
917 | if (retval) | |
918 | return retval; | |
907f4554 | 919 | |
bd4c625c LT |
920 | reiserfs_write_lock(dir->i_sb); |
921 | retval = journal_begin(&th, dir->i_sb, jbegin_count); | |
922 | if (retval) | |
923 | goto out_rmdir; | |
924 | ||
925 | de.de_gen_number_bit_string = NULL; | |
926 | if ((retval = | |
927 | reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, | |
928 | &path, &de)) == NAME_NOT_FOUND) { | |
929 | retval = -ENOENT; | |
930 | goto end_rmdir; | |
931 | } else if (retval == IO_ERROR) { | |
932 | retval = -EIO; | |
933 | goto end_rmdir; | |
934 | } | |
935 | ||
2b0143b5 | 936 | inode = d_inode(dentry); |
bd4c625c LT |
937 | |
938 | reiserfs_update_inode_transaction(inode); | |
939 | reiserfs_update_inode_transaction(dir); | |
940 | ||
941 | if (de.de_objectid != inode->i_ino) { | |
098297b2 JM |
942 | /* |
943 | * FIXME: compare key of an object and a key found in the entry | |
944 | */ | |
bd4c625c LT |
945 | retval = -EIO; |
946 | goto end_rmdir; | |
947 | } | |
948 | if (!reiserfs_empty_dir(inode)) { | |
949 | retval = -ENOTEMPTY; | |
950 | goto end_rmdir; | |
951 | } | |
952 | ||
953 | /* cut entry from dir directory */ | |
a228bf8f JM |
954 | retval = reiserfs_cut_from_item(&th, &path, &de.de_entry_key, |
955 | dir, NULL, /* page */ | |
bd4c625c LT |
956 | 0 /*new file size - not used here */ ); |
957 | if (retval < 0) | |
958 | goto end_rmdir; | |
959 | ||
960 | if (inode->i_nlink != 2 && inode->i_nlink != 1) | |
0030b645 JM |
961 | reiserfs_error(inode->i_sb, "reiserfs-7040", |
962 | "empty directory has nlink != 2 (%d)", | |
963 | inode->i_nlink); | |
bd4c625c | 964 | |
ce71ec36 | 965 | clear_nlink(inode); |
02027d42 | 966 | inode->i_ctime = dir->i_ctime = dir->i_mtime = current_time(dir); |
bd4c625c LT |
967 | reiserfs_update_sd(&th, inode); |
968 | ||
969 | DEC_DIR_INODE_NLINK(dir) | |
5404e7e0 | 970 | dir->i_size -= (DEH_SIZE + de.de_entrylen); |
bd4c625c LT |
971 | reiserfs_update_sd(&th, dir); |
972 | ||
973 | /* prevent empty directory from getting lost */ | |
974 | add_save_link(&th, inode, 0 /* not truncate */ ); | |
975 | ||
58d85426 | 976 | retval = journal_end(&th); |
bd4c625c | 977 | reiserfs_check_path(&path); |
cf776a7a | 978 | out_rmdir: |
bd4c625c LT |
979 | reiserfs_write_unlock(dir->i_sb); |
980 | return retval; | |
981 | ||
cf776a7a | 982 | end_rmdir: |
098297b2 JM |
983 | /* |
984 | * we must release path, because we did not call | |
985 | * reiserfs_cut_from_item, or reiserfs_cut_from_item does not | |
986 | * release path if operation was not complete | |
987 | */ | |
bd4c625c | 988 | pathrelse(&path); |
58d85426 | 989 | err = journal_end(&th); |
bd4c625c LT |
990 | reiserfs_write_unlock(dir->i_sb); |
991 | return err ? err : retval; | |
1da177e4 LT |
992 | } |
993 | ||
bd4c625c | 994 | static int reiserfs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 | 995 | { |
bd4c625c LT |
996 | int retval, err; |
997 | struct inode *inode; | |
998 | struct reiserfs_dir_entry de; | |
999 | INITIALIZE_PATH(path); | |
1000 | struct reiserfs_transaction_handle th; | |
1001 | int jbegin_count; | |
1002 | unsigned long savelink; | |
1003 | ||
2e6c97ea JK |
1004 | retval = dquot_initialize(dir); |
1005 | if (retval) | |
1006 | return retval; | |
907f4554 | 1007 | |
2b0143b5 | 1008 | inode = d_inode(dentry); |
bd4c625c | 1009 | |
098297b2 JM |
1010 | /* |
1011 | * in this transaction we can be doing at max two balancings and | |
1012 | * update two stat datas, we change quotas of the owner of the | |
1013 | * directory and of the owner of the parent directory. The quota | |
1014 | * structure is possibly deleted only on iput => outside of | |
1015 | * this transaction | |
1016 | */ | |
bd4c625c LT |
1017 | jbegin_count = |
1018 | JOURNAL_PER_BALANCE_CNT * 2 + 2 + | |
1019 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
1020 | ||
278f6679 | 1021 | reiserfs_write_lock(dir->i_sb); |
bd4c625c LT |
1022 | retval = journal_begin(&th, dir->i_sb, jbegin_count); |
1023 | if (retval) | |
1024 | goto out_unlink; | |
1025 | ||
1026 | de.de_gen_number_bit_string = NULL; | |
1027 | if ((retval = | |
1028 | reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, | |
1029 | &path, &de)) == NAME_NOT_FOUND) { | |
1030 | retval = -ENOENT; | |
1031 | goto end_unlink; | |
1032 | } else if (retval == IO_ERROR) { | |
1033 | retval = -EIO; | |
1034 | goto end_unlink; | |
1035 | } | |
1036 | ||
1037 | reiserfs_update_inode_transaction(inode); | |
1038 | reiserfs_update_inode_transaction(dir); | |
1039 | ||
1040 | if (de.de_objectid != inode->i_ino) { | |
098297b2 JM |
1041 | /* |
1042 | * FIXME: compare key of an object and a key found in the entry | |
1043 | */ | |
bd4c625c LT |
1044 | retval = -EIO; |
1045 | goto end_unlink; | |
1046 | } | |
1047 | ||
1048 | if (!inode->i_nlink) { | |
45b03d5e JM |
1049 | reiserfs_warning(inode->i_sb, "reiserfs-7042", |
1050 | "deleting nonexistent file (%lu), %d", | |
1051 | inode->i_ino, inode->i_nlink); | |
bfe86848 | 1052 | set_nlink(inode, 1); |
bd4c625c LT |
1053 | } |
1054 | ||
9a53c3a7 | 1055 | drop_nlink(inode); |
bd4c625c LT |
1056 | |
1057 | /* | |
1058 | * we schedule before doing the add_save_link call, save the link | |
1059 | * count so we don't race | |
1060 | */ | |
1061 | savelink = inode->i_nlink; | |
1062 | ||
1063 | retval = | |
a228bf8f | 1064 | reiserfs_cut_from_item(&th, &path, &de.de_entry_key, dir, NULL, |
bd4c625c LT |
1065 | 0); |
1066 | if (retval < 0) { | |
d8c76e6f | 1067 | inc_nlink(inode); |
bd4c625c LT |
1068 | goto end_unlink; |
1069 | } | |
02027d42 | 1070 | inode->i_ctime = current_time(inode); |
bd4c625c LT |
1071 | reiserfs_update_sd(&th, inode); |
1072 | ||
1073 | dir->i_size -= (de.de_entrylen + DEH_SIZE); | |
02027d42 | 1074 | dir->i_ctime = dir->i_mtime = current_time(dir); |
bd4c625c LT |
1075 | reiserfs_update_sd(&th, dir); |
1076 | ||
1077 | if (!savelink) | |
1078 | /* prevent file from getting lost */ | |
1079 | add_save_link(&th, inode, 0 /* not truncate */ ); | |
1080 | ||
58d85426 | 1081 | retval = journal_end(&th); |
bd4c625c | 1082 | reiserfs_check_path(&path); |
278f6679 | 1083 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c LT |
1084 | return retval; |
1085 | ||
cf776a7a | 1086 | end_unlink: |
bd4c625c | 1087 | pathrelse(&path); |
58d85426 | 1088 | err = journal_end(&th); |
bd4c625c | 1089 | reiserfs_check_path(&path); |
1da177e4 | 1090 | if (err) |
bd4c625c | 1091 | retval = err; |
cf776a7a | 1092 | out_unlink: |
278f6679 | 1093 | reiserfs_write_unlock(dir->i_sb); |
bd4c625c | 1094 | return retval; |
1da177e4 LT |
1095 | } |
1096 | ||
bd4c625c LT |
1097 | static int reiserfs_symlink(struct inode *parent_dir, |
1098 | struct dentry *dentry, const char *symname) | |
1da177e4 | 1099 | { |
bd4c625c LT |
1100 | int retval; |
1101 | struct inode *inode; | |
1102 | char *name; | |
1103 | int item_len; | |
1104 | struct reiserfs_transaction_handle th; | |
57fe60df | 1105 | struct reiserfs_security_handle security; |
bd4c625c | 1106 | int mode = S_IFLNK | S_IRWXUGO; |
098297b2 JM |
1107 | /* |
1108 | * We need blocks for transaction + (user+group)*(quotas for | |
1109 | * new inode + update of quota for directory owner) | |
1110 | */ | |
bd4c625c LT |
1111 | int jbegin_count = |
1112 | JOURNAL_PER_BALANCE_CNT * 3 + | |
1113 | 2 * (REISERFS_QUOTA_INIT_BLOCKS(parent_dir->i_sb) + | |
1114 | REISERFS_QUOTA_TRANS_BLOCKS(parent_dir->i_sb)); | |
1115 | ||
2e6c97ea JK |
1116 | retval = dquot_initialize(parent_dir); |
1117 | if (retval) | |
1118 | return retval; | |
907f4554 | 1119 | |
bd4c625c LT |
1120 | if (!(inode = new_inode(parent_dir->i_sb))) { |
1121 | return -ENOMEM; | |
1122 | } | |
2e6c97ea JK |
1123 | retval = new_inode_init(inode, parent_dir, mode); |
1124 | if (retval) { | |
1125 | drop_new_inode(inode); | |
1126 | return retval; | |
1127 | } | |
bd4c625c | 1128 | |
2a7dba39 EP |
1129 | retval = reiserfs_security_init(parent_dir, inode, &dentry->d_name, |
1130 | &security); | |
57fe60df JM |
1131 | if (retval < 0) { |
1132 | drop_new_inode(inode); | |
1133 | return retval; | |
1134 | } | |
1135 | jbegin_count += retval; | |
1136 | ||
bd4c625c LT |
1137 | reiserfs_write_lock(parent_dir->i_sb); |
1138 | item_len = ROUND_UP(strlen(symname)); | |
1139 | if (item_len > MAX_DIRECT_ITEM_LEN(parent_dir->i_sb->s_blocksize)) { | |
1140 | retval = -ENAMETOOLONG; | |
1141 | drop_new_inode(inode); | |
1142 | goto out_failed; | |
1143 | } | |
1144 | ||
d739b42b | 1145 | name = kmalloc(item_len, GFP_NOFS); |
bd4c625c LT |
1146 | if (!name) { |
1147 | drop_new_inode(inode); | |
1148 | retval = -ENOMEM; | |
1149 | goto out_failed; | |
1150 | } | |
1151 | memcpy(name, symname, strlen(symname)); | |
1152 | padd_item(name, item_len, strlen(symname)); | |
1153 | ||
bd4c625c LT |
1154 | retval = journal_begin(&th, parent_dir->i_sb, jbegin_count); |
1155 | if (retval) { | |
1156 | drop_new_inode(inode); | |
d739b42b | 1157 | kfree(name); |
bd4c625c LT |
1158 | goto out_failed; |
1159 | } | |
1160 | ||
1161 | retval = | |
1162 | reiserfs_new_inode(&th, parent_dir, mode, name, strlen(symname), | |
57fe60df | 1163 | dentry, inode, &security); |
d739b42b | 1164 | kfree(name); |
bd4c625c LT |
1165 | if (retval) { /* reiserfs_new_inode iputs for us */ |
1166 | goto out_failed; | |
1167 | } | |
1da177e4 | 1168 | |
bd4c625c LT |
1169 | reiserfs_update_inode_transaction(inode); |
1170 | reiserfs_update_inode_transaction(parent_dir); | |
1171 | ||
1172 | inode->i_op = &reiserfs_symlink_inode_operations; | |
21fc61c7 | 1173 | inode_nohighmem(inode); |
bd4c625c LT |
1174 | inode->i_mapping->a_ops = &reiserfs_address_space_operations; |
1175 | ||
bd4c625c LT |
1176 | retval = reiserfs_add_entry(&th, parent_dir, dentry->d_name.name, |
1177 | dentry->d_name.len, inode, 1 /*visible */ ); | |
1178 | if (retval) { | |
1179 | int err; | |
6d6b77f1 | 1180 | drop_nlink(inode); |
bd4c625c | 1181 | reiserfs_update_sd(&th, inode); |
58d85426 | 1182 | err = journal_end(&th); |
bd4c625c LT |
1183 | if (err) |
1184 | retval = err; | |
c1eaa26b | 1185 | unlock_new_inode(inode); |
bd4c625c LT |
1186 | iput(inode); |
1187 | goto out_failed; | |
1188 | } | |
1da177e4 | 1189 | |
1e2e547a | 1190 | d_instantiate_new(dentry, inode); |
58d85426 | 1191 | retval = journal_end(&th); |
cf776a7a | 1192 | out_failed: |
bd4c625c LT |
1193 | reiserfs_write_unlock(parent_dir->i_sb); |
1194 | return retval; | |
1da177e4 LT |
1195 | } |
1196 | ||
bd4c625c LT |
1197 | static int reiserfs_link(struct dentry *old_dentry, struct inode *dir, |
1198 | struct dentry *dentry) | |
1199 | { | |
1200 | int retval; | |
2b0143b5 | 1201 | struct inode *inode = d_inode(old_dentry); |
bd4c625c | 1202 | struct reiserfs_transaction_handle th; |
098297b2 JM |
1203 | /* |
1204 | * We need blocks for transaction + update of quotas for | |
1205 | * the owners of the directory | |
1206 | */ | |
bd4c625c LT |
1207 | int jbegin_count = |
1208 | JOURNAL_PER_BALANCE_CNT * 3 + | |
1209 | 2 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb); | |
1210 | ||
2e6c97ea JK |
1211 | retval = dquot_initialize(dir); |
1212 | if (retval) | |
1213 | return retval; | |
907f4554 | 1214 | |
bd4c625c LT |
1215 | reiserfs_write_lock(dir->i_sb); |
1216 | if (inode->i_nlink >= REISERFS_LINK_MAX) { | |
098297b2 | 1217 | /* FIXME: sd_nlink is 32 bit for new files */ |
bd4c625c LT |
1218 | reiserfs_write_unlock(dir->i_sb); |
1219 | return -EMLINK; | |
1220 | } | |
bd4c625c LT |
1221 | |
1222 | /* inc before scheduling so reiserfs_unlink knows we are here */ | |
d8c76e6f | 1223 | inc_nlink(inode); |
bd4c625c LT |
1224 | |
1225 | retval = journal_begin(&th, dir->i_sb, jbegin_count); | |
1226 | if (retval) { | |
6d6b77f1 | 1227 | drop_nlink(inode); |
bd4c625c LT |
1228 | reiserfs_write_unlock(dir->i_sb); |
1229 | return retval; | |
1230 | } | |
1231 | ||
1232 | /* create new entry */ | |
1233 | retval = | |
1234 | reiserfs_add_entry(&th, dir, dentry->d_name.name, | |
1235 | dentry->d_name.len, inode, 1 /*visible */ ); | |
1236 | ||
1237 | reiserfs_update_inode_transaction(inode); | |
1238 | reiserfs_update_inode_transaction(dir); | |
1239 | ||
1240 | if (retval) { | |
1241 | int err; | |
6d6b77f1 | 1242 | drop_nlink(inode); |
58d85426 | 1243 | err = journal_end(&th); |
bd4c625c LT |
1244 | reiserfs_write_unlock(dir->i_sb); |
1245 | return err ? err : retval; | |
1246 | } | |
1247 | ||
02027d42 | 1248 | inode->i_ctime = current_time(inode); |
bd4c625c LT |
1249 | reiserfs_update_sd(&th, inode); |
1250 | ||
7de9c6ee | 1251 | ihold(inode); |
bd4c625c | 1252 | d_instantiate(dentry, inode); |
58d85426 | 1253 | retval = journal_end(&th); |
bd4c625c LT |
1254 | reiserfs_write_unlock(dir->i_sb); |
1255 | return retval; | |
1256 | } | |
1da177e4 | 1257 | |
0222e657 | 1258 | /* de contains information pointing to an entry which */ |
bd4c625c LT |
1259 | static int de_still_valid(const char *name, int len, |
1260 | struct reiserfs_dir_entry *de) | |
1da177e4 | 1261 | { |
bd4c625c LT |
1262 | struct reiserfs_dir_entry tmp = *de; |
1263 | ||
098297b2 | 1264 | /* recalculate pointer to name and name length */ |
bd4c625c | 1265 | set_de_name_and_namelen(&tmp); |
098297b2 | 1266 | /* FIXME: could check more */ |
bd4c625c LT |
1267 | if (tmp.de_namelen != len || memcmp(name, de->de_name, len)) |
1268 | return 0; | |
1269 | return 1; | |
1da177e4 LT |
1270 | } |
1271 | ||
bd4c625c LT |
1272 | static int entry_points_to_object(const char *name, int len, |
1273 | struct reiserfs_dir_entry *de, | |
1274 | struct inode *inode) | |
1da177e4 | 1275 | { |
bd4c625c LT |
1276 | if (!de_still_valid(name, len, de)) |
1277 | return 0; | |
1278 | ||
1279 | if (inode) { | |
1280 | if (!de_visible(de->de_deh + de->de_entry_num)) | |
c3a9c210 JM |
1281 | reiserfs_panic(inode->i_sb, "vs-7042", |
1282 | "entry must be visible"); | |
bd4c625c LT |
1283 | return (de->de_objectid == inode->i_ino) ? 1 : 0; |
1284 | } | |
1da177e4 | 1285 | |
bd4c625c LT |
1286 | /* this must be added hidden entry */ |
1287 | if (de_visible(de->de_deh + de->de_entry_num)) | |
c3a9c210 | 1288 | reiserfs_panic(NULL, "vs-7043", "entry must be visible"); |
1da177e4 | 1289 | |
bd4c625c | 1290 | return 1; |
1da177e4 LT |
1291 | } |
1292 | ||
1da177e4 | 1293 | /* sets key of objectid the entry has to point to */ |
bd4c625c LT |
1294 | static void set_ino_in_dir_entry(struct reiserfs_dir_entry *de, |
1295 | struct reiserfs_key *key) | |
1da177e4 | 1296 | { |
bd4c625c LT |
1297 | /* JDM These operations are endian safe - both are le */ |
1298 | de->de_deh[de->de_entry_num].deh_dir_id = key->k_dir_id; | |
1299 | de->de_deh[de->de_entry_num].deh_objectid = key->k_objectid; | |
1da177e4 LT |
1300 | } |
1301 | ||
0222e657 | 1302 | /* |
1da177e4 LT |
1303 | * process, that is going to call fix_nodes/do_balance must hold only |
1304 | * one path. If it holds 2 or more, it can get into endless waiting in | |
0222e657 | 1305 | * get_empty_nodes or its clones |
1da177e4 | 1306 | */ |
bd4c625c | 1307 | static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
f03b8ad8 MS |
1308 | struct inode *new_dir, struct dentry *new_dentry, |
1309 | unsigned int flags) | |
1da177e4 | 1310 | { |
bd4c625c LT |
1311 | int retval; |
1312 | INITIALIZE_PATH(old_entry_path); | |
1313 | INITIALIZE_PATH(new_entry_path); | |
1314 | INITIALIZE_PATH(dot_dot_entry_path); | |
1315 | struct item_head new_entry_ih, old_entry_ih, dot_dot_ih; | |
1316 | struct reiserfs_dir_entry old_de, new_de, dot_dot_de; | |
1317 | struct inode *old_inode, *new_dentry_inode; | |
1318 | struct reiserfs_transaction_handle th; | |
1319 | int jbegin_count; | |
1320 | umode_t old_inode_mode; | |
1321 | unsigned long savelink = 1; | |
95582b00 | 1322 | struct timespec64 ctime; |
bd4c625c | 1323 | |
f03b8ad8 MS |
1324 | if (flags & ~RENAME_NOREPLACE) |
1325 | return -EINVAL; | |
1326 | ||
098297b2 JM |
1327 | /* |
1328 | * three balancings: (1) old name removal, (2) new name insertion | |
1329 | * and (3) maybe "save" link insertion | |
1330 | * stat data updates: (1) old directory, | |
1331 | * (2) new directory and (3) maybe old object stat data (when it is | |
1332 | * directory) and (4) maybe stat data of object to which new entry | |
1333 | * pointed initially and (5) maybe block containing ".." of | |
1334 | * renamed directory | |
1335 | * quota updates: two parent directories | |
1336 | */ | |
bd4c625c LT |
1337 | jbegin_count = |
1338 | JOURNAL_PER_BALANCE_CNT * 3 + 5 + | |
1339 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(old_dir->i_sb); | |
1340 | ||
2e6c97ea JK |
1341 | retval = dquot_initialize(old_dir); |
1342 | if (retval) | |
1343 | return retval; | |
1344 | retval = dquot_initialize(new_dir); | |
1345 | if (retval) | |
1346 | return retval; | |
907f4554 | 1347 | |
2b0143b5 DH |
1348 | old_inode = d_inode(old_dentry); |
1349 | new_dentry_inode = d_inode(new_dentry); | |
bd4c625c | 1350 | |
098297b2 JM |
1351 | /* |
1352 | * make sure that oldname still exists and points to an object we | |
1353 | * are going to rename | |
1354 | */ | |
bd4c625c LT |
1355 | old_de.de_gen_number_bit_string = NULL; |
1356 | reiserfs_write_lock(old_dir->i_sb); | |
1357 | retval = | |
1358 | reiserfs_find_entry(old_dir, old_dentry->d_name.name, | |
1359 | old_dentry->d_name.len, &old_entry_path, | |
1360 | &old_de); | |
1361 | pathrelse(&old_entry_path); | |
1362 | if (retval == IO_ERROR) { | |
1da177e4 | 1363 | reiserfs_write_unlock(old_dir->i_sb); |
bd4c625c | 1364 | return -EIO; |
1da177e4 | 1365 | } |
bd4c625c LT |
1366 | |
1367 | if (retval != NAME_FOUND || old_de.de_objectid != old_inode->i_ino) { | |
1368 | reiserfs_write_unlock(old_dir->i_sb); | |
1369 | return -ENOENT; | |
1da177e4 LT |
1370 | } |
1371 | ||
bd4c625c LT |
1372 | old_inode_mode = old_inode->i_mode; |
1373 | if (S_ISDIR(old_inode_mode)) { | |
098297b2 JM |
1374 | /* |
1375 | * make sure that directory being renamed has correct ".." | |
1376 | * and that its new parent directory has not too many links | |
1377 | * already | |
1378 | */ | |
bd4c625c LT |
1379 | if (new_dentry_inode) { |
1380 | if (!reiserfs_empty_dir(new_dentry_inode)) { | |
1381 | reiserfs_write_unlock(old_dir->i_sb); | |
1382 | return -ENOTEMPTY; | |
1383 | } | |
1384 | } | |
1385 | ||
098297b2 JM |
1386 | /* |
1387 | * directory is renamed, its parent directory will be changed, | |
1388 | * so find ".." entry | |
bd4c625c LT |
1389 | */ |
1390 | dot_dot_de.de_gen_number_bit_string = NULL; | |
1391 | retval = | |
1392 | reiserfs_find_entry(old_inode, "..", 2, &dot_dot_entry_path, | |
1393 | &dot_dot_de); | |
1394 | pathrelse(&dot_dot_entry_path); | |
1395 | if (retval != NAME_FOUND) { | |
1396 | reiserfs_write_unlock(old_dir->i_sb); | |
1397 | return -EIO; | |
1398 | } | |
1399 | ||
1400 | /* inode number of .. must equal old_dir->i_ino */ | |
1401 | if (dot_dot_de.de_objectid != old_dir->i_ino) { | |
1402 | reiserfs_write_unlock(old_dir->i_sb); | |
1403 | return -EIO; | |
1404 | } | |
1da177e4 | 1405 | } |
bd4c625c LT |
1406 | |
1407 | retval = journal_begin(&th, old_dir->i_sb, jbegin_count); | |
1408 | if (retval) { | |
1409 | reiserfs_write_unlock(old_dir->i_sb); | |
1410 | return retval; | |
1da177e4 | 1411 | } |
bd4c625c LT |
1412 | |
1413 | /* add new entry (or find the existing one) */ | |
1414 | retval = | |
1415 | reiserfs_add_entry(&th, new_dir, new_dentry->d_name.name, | |
1416 | new_dentry->d_name.len, old_inode, 0); | |
1417 | if (retval == -EEXIST) { | |
1418 | if (!new_dentry_inode) { | |
c3a9c210 JM |
1419 | reiserfs_panic(old_dir->i_sb, "vs-7050", |
1420 | "new entry is found, new inode == 0"); | |
bd4c625c LT |
1421 | } |
1422 | } else if (retval) { | |
58d85426 | 1423 | int err = journal_end(&th); |
bd4c625c LT |
1424 | reiserfs_write_unlock(old_dir->i_sb); |
1425 | return err ? err : retval; | |
1da177e4 LT |
1426 | } |
1427 | ||
bd4c625c LT |
1428 | reiserfs_update_inode_transaction(old_dir); |
1429 | reiserfs_update_inode_transaction(new_dir); | |
1430 | ||
098297b2 JM |
1431 | /* |
1432 | * this makes it so an fsync on an open fd for the old name will | |
1433 | * commit the rename operation | |
bd4c625c LT |
1434 | */ |
1435 | reiserfs_update_inode_transaction(old_inode); | |
1436 | ||
1437 | if (new_dentry_inode) | |
1438 | reiserfs_update_inode_transaction(new_dentry_inode); | |
1439 | ||
1440 | while (1) { | |
098297b2 JM |
1441 | /* |
1442 | * look for old name using corresponding entry key | |
1443 | * (found by reiserfs_find_entry) | |
1444 | */ | |
bd4c625c LT |
1445 | if ((retval = |
1446 | search_by_entry_key(new_dir->i_sb, &old_de.de_entry_key, | |
1447 | &old_entry_path, | |
1448 | &old_de)) != NAME_FOUND) { | |
1449 | pathrelse(&old_entry_path); | |
58d85426 | 1450 | journal_end(&th); |
bd4c625c LT |
1451 | reiserfs_write_unlock(old_dir->i_sb); |
1452 | return -EIO; | |
1453 | } | |
1454 | ||
4cf5f7ad | 1455 | copy_item_head(&old_entry_ih, tp_item_head(&old_entry_path)); |
bd4c625c LT |
1456 | |
1457 | reiserfs_prepare_for_journal(old_inode->i_sb, old_de.de_bh, 1); | |
1458 | ||
098297b2 | 1459 | /* look for new name by reiserfs_find_entry */ |
bd4c625c LT |
1460 | new_de.de_gen_number_bit_string = NULL; |
1461 | retval = | |
1462 | reiserfs_find_entry(new_dir, new_dentry->d_name.name, | |
1463 | new_dentry->d_name.len, &new_entry_path, | |
1464 | &new_de); | |
098297b2 JM |
1465 | /* |
1466 | * reiserfs_add_entry should not return IO_ERROR, | |
1467 | * because it is called with essentially same parameters from | |
1468 | * reiserfs_add_entry above, and we'll catch any i/o errors | |
1469 | * before we get here. | |
1470 | */ | |
bd4c625c LT |
1471 | if (retval != NAME_FOUND_INVISIBLE && retval != NAME_FOUND) { |
1472 | pathrelse(&new_entry_path); | |
1473 | pathrelse(&old_entry_path); | |
58d85426 | 1474 | journal_end(&th); |
bd4c625c LT |
1475 | reiserfs_write_unlock(old_dir->i_sb); |
1476 | return -EIO; | |
1477 | } | |
1478 | ||
4cf5f7ad | 1479 | copy_item_head(&new_entry_ih, tp_item_head(&new_entry_path)); |
bd4c625c LT |
1480 | |
1481 | reiserfs_prepare_for_journal(old_inode->i_sb, new_de.de_bh, 1); | |
1482 | ||
1483 | if (S_ISDIR(old_inode->i_mode)) { | |
1484 | if ((retval = | |
1485 | search_by_entry_key(new_dir->i_sb, | |
1486 | &dot_dot_de.de_entry_key, | |
1487 | &dot_dot_entry_path, | |
1488 | &dot_dot_de)) != NAME_FOUND) { | |
1489 | pathrelse(&dot_dot_entry_path); | |
1490 | pathrelse(&new_entry_path); | |
1491 | pathrelse(&old_entry_path); | |
58d85426 | 1492 | journal_end(&th); |
bd4c625c LT |
1493 | reiserfs_write_unlock(old_dir->i_sb); |
1494 | return -EIO; | |
1495 | } | |
1496 | copy_item_head(&dot_dot_ih, | |
4cf5f7ad | 1497 | tp_item_head(&dot_dot_entry_path)); |
098297b2 | 1498 | /* node containing ".." gets into transaction */ |
bd4c625c LT |
1499 | reiserfs_prepare_for_journal(old_inode->i_sb, |
1500 | dot_dot_de.de_bh, 1); | |
1501 | } | |
098297b2 JM |
1502 | /* |
1503 | * we should check seals here, not do | |
1504 | * this stuff, yes? Then, having | |
1505 | * gathered everything into RAM we | |
1506 | * should lock the buffers, yes? -Hans | |
1507 | */ | |
1508 | /* | |
1509 | * probably. our rename needs to hold more | |
1510 | * than one path at once. The seals would | |
1511 | * have to be written to deal with multi-path | |
1512 | * issues -chris | |
bd4c625c | 1513 | */ |
098297b2 JM |
1514 | /* |
1515 | * sanity checking before doing the rename - avoid races many | |
1516 | * of the above checks could have scheduled. We have to be | |
1517 | * sure our items haven't been shifted by another process. | |
bd4c625c LT |
1518 | */ |
1519 | if (item_moved(&new_entry_ih, &new_entry_path) || | |
1520 | !entry_points_to_object(new_dentry->d_name.name, | |
1521 | new_dentry->d_name.len, | |
1522 | &new_de, new_dentry_inode) || | |
1523 | item_moved(&old_entry_ih, &old_entry_path) || | |
1524 | !entry_points_to_object(old_dentry->d_name.name, | |
1525 | old_dentry->d_name.len, | |
1526 | &old_de, old_inode)) { | |
1527 | reiserfs_restore_prepared_buffer(old_inode->i_sb, | |
1528 | new_de.de_bh); | |
1529 | reiserfs_restore_prepared_buffer(old_inode->i_sb, | |
1530 | old_de.de_bh); | |
1531 | if (S_ISDIR(old_inode_mode)) | |
1532 | reiserfs_restore_prepared_buffer(old_inode-> | |
1533 | i_sb, | |
1534 | dot_dot_de. | |
1535 | de_bh); | |
1536 | continue; | |
1537 | } | |
1538 | if (S_ISDIR(old_inode_mode)) { | |
1539 | if (item_moved(&dot_dot_ih, &dot_dot_entry_path) || | |
1540 | !entry_points_to_object("..", 2, &dot_dot_de, | |
1541 | old_dir)) { | |
1542 | reiserfs_restore_prepared_buffer(old_inode-> | |
1543 | i_sb, | |
1544 | old_de.de_bh); | |
1545 | reiserfs_restore_prepared_buffer(old_inode-> | |
1546 | i_sb, | |
1547 | new_de.de_bh); | |
1548 | reiserfs_restore_prepared_buffer(old_inode-> | |
1549 | i_sb, | |
1550 | dot_dot_de. | |
1551 | de_bh); | |
1552 | continue; | |
1553 | } | |
1554 | } | |
1555 | ||
1556 | RFALSE(S_ISDIR(old_inode_mode) && | |
1557 | !buffer_journal_prepared(dot_dot_de.de_bh), ""); | |
1558 | ||
1559 | break; | |
1da177e4 LT |
1560 | } |
1561 | ||
098297b2 JM |
1562 | /* |
1563 | * ok, all the changes can be done in one fell swoop when we | |
1564 | * have claimed all the buffers needed. | |
1565 | */ | |
1da177e4 | 1566 | |
bd4c625c LT |
1567 | mark_de_visible(new_de.de_deh + new_de.de_entry_num); |
1568 | set_ino_in_dir_entry(&new_de, INODE_PKEY(old_inode)); | |
09f1b80b | 1569 | journal_mark_dirty(&th, new_de.de_bh); |
1da177e4 | 1570 | |
bd4c625c | 1571 | mark_de_hidden(old_de.de_deh + old_de.de_entry_num); |
09f1b80b | 1572 | journal_mark_dirty(&th, old_de.de_bh); |
02027d42 | 1573 | ctime = current_time(old_dir); |
bd4c625c LT |
1574 | old_dir->i_ctime = old_dir->i_mtime = ctime; |
1575 | new_dir->i_ctime = new_dir->i_mtime = ctime; | |
098297b2 JM |
1576 | /* |
1577 | * thanks to Alex Adriaanse <alex_a@caltech.edu> for patch | |
1578 | * which adds ctime update of renamed object | |
1579 | */ | |
bd4c625c LT |
1580 | old_inode->i_ctime = ctime; |
1581 | ||
1582 | if (new_dentry_inode) { | |
098297b2 | 1583 | /* adjust link number of the victim */ |
bd4c625c | 1584 | if (S_ISDIR(new_dentry_inode->i_mode)) { |
ce71ec36 | 1585 | clear_nlink(new_dentry_inode); |
bd4c625c | 1586 | } else { |
9a53c3a7 | 1587 | drop_nlink(new_dentry_inode); |
bd4c625c LT |
1588 | } |
1589 | new_dentry_inode->i_ctime = ctime; | |
1590 | savelink = new_dentry_inode->i_nlink; | |
1da177e4 | 1591 | } |
bd4c625c | 1592 | |
1da177e4 | 1593 | if (S_ISDIR(old_inode_mode)) { |
0222e657 | 1594 | /* adjust ".." of renamed directory */ |
bd4c625c | 1595 | set_ino_in_dir_entry(&dot_dot_de, INODE_PKEY(new_dir)); |
09f1b80b | 1596 | journal_mark_dirty(&th, dot_dot_de.de_bh); |
bd4c625c | 1597 | |
098297b2 JM |
1598 | /* |
1599 | * there (in new_dir) was no directory, so it got new link | |
1600 | * (".." of renamed directory) | |
1601 | */ | |
bd4c625c | 1602 | if (!new_dentry_inode) |
bd4c625c LT |
1603 | INC_DIR_INODE_NLINK(new_dir); |
1604 | ||
1605 | /* old directory lost one link - ".. " of renamed directory */ | |
1606 | DEC_DIR_INODE_NLINK(old_dir); | |
1da177e4 | 1607 | } |
098297b2 JM |
1608 | /* |
1609 | * looks like in 2.3.99pre3 brelse is atomic. | |
1610 | * so we can use pathrelse | |
1611 | */ | |
bd4c625c LT |
1612 | pathrelse(&new_entry_path); |
1613 | pathrelse(&dot_dot_entry_path); | |
1da177e4 | 1614 | |
098297b2 JM |
1615 | /* |
1616 | * FIXME: this reiserfs_cut_from_item's return value may screw up | |
1617 | * anybody, but it will panic if will not be able to find the | |
1618 | * entry. This needs one more clean up | |
1619 | */ | |
bd4c625c | 1620 | if (reiserfs_cut_from_item |
a228bf8f | 1621 | (&th, &old_entry_path, &old_de.de_entry_key, old_dir, NULL, |
bd4c625c | 1622 | 0) < 0) |
0030b645 JM |
1623 | reiserfs_error(old_dir->i_sb, "vs-7060", |
1624 | "couldn't not cut old name. Fsck later?"); | |
bd4c625c LT |
1625 | |
1626 | old_dir->i_size -= DEH_SIZE + old_de.de_entrylen; | |
1627 | ||
1628 | reiserfs_update_sd(&th, old_dir); | |
1629 | reiserfs_update_sd(&th, new_dir); | |
1630 | reiserfs_update_sd(&th, old_inode); | |
1631 | ||
1632 | if (new_dentry_inode) { | |
1633 | if (savelink == 0) | |
1634 | add_save_link(&th, new_dentry_inode, | |
1635 | 0 /* not truncate */ ); | |
1636 | reiserfs_update_sd(&th, new_dentry_inode); | |
1da177e4 | 1637 | } |
bd4c625c | 1638 | |
58d85426 | 1639 | retval = journal_end(&th); |
bd4c625c LT |
1640 | reiserfs_write_unlock(old_dir->i_sb); |
1641 | return retval; | |
1da177e4 LT |
1642 | } |
1643 | ||
098297b2 | 1644 | /* directories can handle most operations... */ |
c5ef1c42 | 1645 | const struct inode_operations reiserfs_dir_inode_operations = { |
bd4c625c LT |
1646 | .create = reiserfs_create, |
1647 | .lookup = reiserfs_lookup, | |
1648 | .link = reiserfs_link, | |
1649 | .unlink = reiserfs_unlink, | |
1650 | .symlink = reiserfs_symlink, | |
1651 | .mkdir = reiserfs_mkdir, | |
1652 | .rmdir = reiserfs_rmdir, | |
1653 | .mknod = reiserfs_mknod, | |
1654 | .rename = reiserfs_rename, | |
1655 | .setattr = reiserfs_setattr, | |
bd4c625c | 1656 | .listxattr = reiserfs_listxattr, |
bd4c625c | 1657 | .permission = reiserfs_permission, |
4e34e719 | 1658 | .get_acl = reiserfs_get_acl, |
47f70d08 | 1659 | .set_acl = reiserfs_set_acl, |
1da177e4 LT |
1660 | }; |
1661 | ||
1662 | /* | |
1663 | * symlink operations.. same as page_symlink_inode_operations, with xattr | |
1664 | * stuff added | |
1665 | */ | |
c5ef1c42 | 1666 | const struct inode_operations reiserfs_symlink_inode_operations = { |
6b255391 | 1667 | .get_link = page_get_link, |
bd4c625c | 1668 | .setattr = reiserfs_setattr, |
bd4c625c | 1669 | .listxattr = reiserfs_listxattr, |
bd4c625c | 1670 | .permission = reiserfs_permission, |
1da177e4 LT |
1671 | }; |
1672 | ||
1da177e4 LT |
1673 | /* |
1674 | * special file operations.. just xattr/acl stuff | |
1675 | */ | |
c5ef1c42 | 1676 | const struct inode_operations reiserfs_special_inode_operations = { |
bd4c625c | 1677 | .setattr = reiserfs_setattr, |
bd4c625c | 1678 | .listxattr = reiserfs_listxattr, |
bd4c625c | 1679 | .permission = reiserfs_permission, |
4e34e719 | 1680 | .get_acl = reiserfs_get_acl, |
47f70d08 | 1681 | .set_acl = reiserfs_set_acl, |
1da177e4 | 1682 | }; |