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Commit | Line | Data |
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1da177e4 LT |
1 | /* dir.c: AFS filesystem directory handling |
2 | * | |
3 | * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
1da177e4 LT |
15 | #include <linux/slab.h> |
16 | #include <linux/fs.h> | |
17 | #include <linux/pagemap.h> | |
00d3b7a4 | 18 | #include <linux/ctype.h> |
1da177e4 LT |
19 | #include "internal.h" |
20 | ||
260a9803 DH |
21 | static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, |
22 | struct nameidata *nd); | |
1da177e4 | 23 | static int afs_dir_open(struct inode *inode, struct file *file); |
260a9803 | 24 | static int afs_readdir(struct file *file, void *dirent, filldir_t filldir); |
1da177e4 LT |
25 | static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd); |
26 | static int afs_d_delete(struct dentry *dentry); | |
260a9803 DH |
27 | static void afs_d_release(struct dentry *dentry); |
28 | static int afs_lookup_filldir(void *_cookie, const char *name, int nlen, | |
afefdbb2 | 29 | loff_t fpos, u64 ino, unsigned dtype); |
260a9803 DH |
30 | static int afs_create(struct inode *dir, struct dentry *dentry, int mode, |
31 | struct nameidata *nd); | |
32 | static int afs_mkdir(struct inode *dir, struct dentry *dentry, int mode); | |
33 | static int afs_rmdir(struct inode *dir, struct dentry *dentry); | |
34 | static int afs_unlink(struct inode *dir, struct dentry *dentry); | |
35 | static int afs_link(struct dentry *from, struct inode *dir, | |
36 | struct dentry *dentry); | |
37 | static int afs_symlink(struct inode *dir, struct dentry *dentry, | |
38 | const char *content); | |
39 | static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
40 | struct inode *new_dir, struct dentry *new_dentry); | |
1da177e4 | 41 | |
4b6f5d20 | 42 | const struct file_operations afs_dir_file_operations = { |
1da177e4 | 43 | .open = afs_dir_open, |
00d3b7a4 | 44 | .release = afs_release, |
260a9803 | 45 | .readdir = afs_readdir, |
1da177e4 LT |
46 | }; |
47 | ||
754661f1 | 48 | const struct inode_operations afs_dir_inode_operations = { |
260a9803 DH |
49 | .create = afs_create, |
50 | .lookup = afs_lookup, | |
51 | .link = afs_link, | |
52 | .unlink = afs_unlink, | |
53 | .symlink = afs_symlink, | |
54 | .mkdir = afs_mkdir, | |
55 | .rmdir = afs_rmdir, | |
56 | .rename = afs_rename, | |
00d3b7a4 | 57 | .permission = afs_permission, |
416351f2 | 58 | .getattr = afs_getattr, |
31143d5d | 59 | .setattr = afs_setattr, |
1da177e4 LT |
60 | }; |
61 | ||
62 | static struct dentry_operations afs_fs_dentry_operations = { | |
63 | .d_revalidate = afs_d_revalidate, | |
64 | .d_delete = afs_d_delete, | |
260a9803 | 65 | .d_release = afs_d_release, |
1da177e4 LT |
66 | }; |
67 | ||
68 | #define AFS_DIR_HASHTBL_SIZE 128 | |
69 | #define AFS_DIR_DIRENT_SIZE 32 | |
70 | #define AFS_DIRENT_PER_BLOCK 64 | |
71 | ||
72 | union afs_dirent { | |
73 | struct { | |
74 | uint8_t valid; | |
75 | uint8_t unused[1]; | |
76 | __be16 hash_next; | |
77 | __be32 vnode; | |
78 | __be32 unique; | |
79 | uint8_t name[16]; | |
80 | uint8_t overflow[4]; /* if any char of the name (inc | |
81 | * NUL) reaches here, consume | |
82 | * the next dirent too */ | |
83 | } u; | |
84 | uint8_t extended_name[32]; | |
85 | }; | |
86 | ||
87 | /* AFS directory page header (one at the beginning of every 2048-byte chunk) */ | |
88 | struct afs_dir_pagehdr { | |
89 | __be16 npages; | |
90 | __be16 magic; | |
91 | #define AFS_DIR_MAGIC htons(1234) | |
92 | uint8_t nentries; | |
93 | uint8_t bitmap[8]; | |
94 | uint8_t pad[19]; | |
95 | }; | |
96 | ||
97 | /* directory block layout */ | |
98 | union afs_dir_block { | |
99 | ||
100 | struct afs_dir_pagehdr pagehdr; | |
101 | ||
102 | struct { | |
103 | struct afs_dir_pagehdr pagehdr; | |
104 | uint8_t alloc_ctrs[128]; | |
105 | /* dir hash table */ | |
106 | uint16_t hashtable[AFS_DIR_HASHTBL_SIZE]; | |
107 | } hdr; | |
108 | ||
109 | union afs_dirent dirents[AFS_DIRENT_PER_BLOCK]; | |
110 | }; | |
111 | ||
112 | /* layout on a linux VM page */ | |
113 | struct afs_dir_page { | |
114 | union afs_dir_block blocks[PAGE_SIZE / sizeof(union afs_dir_block)]; | |
115 | }; | |
116 | ||
260a9803 | 117 | struct afs_lookup_cookie { |
1da177e4 LT |
118 | struct afs_fid fid; |
119 | const char *name; | |
120 | size_t nlen; | |
121 | int found; | |
122 | }; | |
123 | ||
1da177e4 LT |
124 | /* |
125 | * check that a directory page is valid | |
126 | */ | |
127 | static inline void afs_dir_check_page(struct inode *dir, struct page *page) | |
128 | { | |
129 | struct afs_dir_page *dbuf; | |
130 | loff_t latter; | |
131 | int tmp, qty; | |
132 | ||
133 | #if 0 | |
134 | /* check the page count */ | |
135 | qty = desc.size / sizeof(dbuf->blocks[0]); | |
136 | if (qty == 0) | |
137 | goto error; | |
138 | ||
08e0e7c8 | 139 | if (page->index == 0 && qty != ntohs(dbuf->blocks[0].pagehdr.npages)) { |
1da177e4 | 140 | printk("kAFS: %s(%lu): wrong number of dir blocks %d!=%hu\n", |
08e0e7c8 DH |
141 | __FUNCTION__, dir->i_ino, qty, |
142 | ntohs(dbuf->blocks[0].pagehdr.npages)); | |
1da177e4 LT |
143 | goto error; |
144 | } | |
145 | #endif | |
146 | ||
147 | /* determine how many magic numbers there should be in this page */ | |
54b21a79 | 148 | latter = dir->i_size - page_offset(page); |
1da177e4 LT |
149 | if (latter >= PAGE_SIZE) |
150 | qty = PAGE_SIZE; | |
151 | else | |
152 | qty = latter; | |
153 | qty /= sizeof(union afs_dir_block); | |
154 | ||
155 | /* check them */ | |
156 | dbuf = page_address(page); | |
157 | for (tmp = 0; tmp < qty; tmp++) { | |
158 | if (dbuf->blocks[tmp].pagehdr.magic != AFS_DIR_MAGIC) { | |
159 | printk("kAFS: %s(%lu): bad magic %d/%d is %04hx\n", | |
160 | __FUNCTION__, dir->i_ino, tmp, qty, | |
161 | ntohs(dbuf->blocks[tmp].pagehdr.magic)); | |
162 | goto error; | |
163 | } | |
164 | } | |
165 | ||
166 | SetPageChecked(page); | |
167 | return; | |
168 | ||
ec26815a | 169 | error: |
1da177e4 LT |
170 | SetPageChecked(page); |
171 | SetPageError(page); | |
ec26815a | 172 | } |
1da177e4 | 173 | |
1da177e4 LT |
174 | /* |
175 | * discard a page cached in the pagecache | |
176 | */ | |
177 | static inline void afs_dir_put_page(struct page *page) | |
178 | { | |
179 | kunmap(page); | |
180 | page_cache_release(page); | |
ec26815a | 181 | } |
1da177e4 | 182 | |
1da177e4 LT |
183 | /* |
184 | * get a page into the pagecache | |
185 | */ | |
00d3b7a4 DH |
186 | static struct page *afs_dir_get_page(struct inode *dir, unsigned long index, |
187 | struct key *key) | |
1da177e4 LT |
188 | { |
189 | struct page *page; | |
00d3b7a4 DH |
190 | struct file file = { |
191 | .private_data = key, | |
192 | }; | |
1da177e4 LT |
193 | |
194 | _enter("{%lu},%lu", dir->i_ino, index); | |
195 | ||
00d3b7a4 | 196 | page = read_mapping_page(dir->i_mapping, index, &file); |
1da177e4 | 197 | if (!IS_ERR(page)) { |
1da177e4 | 198 | kmap(page); |
1da177e4 LT |
199 | if (!PageChecked(page)) |
200 | afs_dir_check_page(dir, page); | |
201 | if (PageError(page)) | |
202 | goto fail; | |
203 | } | |
204 | return page; | |
205 | ||
ec26815a | 206 | fail: |
1da177e4 | 207 | afs_dir_put_page(page); |
08e0e7c8 | 208 | _leave(" = -EIO"); |
1da177e4 | 209 | return ERR_PTR(-EIO); |
ec26815a | 210 | } |
1da177e4 | 211 | |
1da177e4 LT |
212 | /* |
213 | * open an AFS directory file | |
214 | */ | |
215 | static int afs_dir_open(struct inode *inode, struct file *file) | |
216 | { | |
217 | _enter("{%lu}", inode->i_ino); | |
218 | ||
2ecd05ae AD |
219 | BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); |
220 | BUILD_BUG_ON(sizeof(union afs_dirent) != 32); | |
1da177e4 | 221 | |
08e0e7c8 | 222 | if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags)) |
1da177e4 LT |
223 | return -ENOENT; |
224 | ||
00d3b7a4 | 225 | return afs_open(inode, file); |
ec26815a | 226 | } |
1da177e4 | 227 | |
1da177e4 LT |
228 | /* |
229 | * deal with one block in an AFS directory | |
230 | */ | |
231 | static int afs_dir_iterate_block(unsigned *fpos, | |
232 | union afs_dir_block *block, | |
233 | unsigned blkoff, | |
234 | void *cookie, | |
235 | filldir_t filldir) | |
236 | { | |
237 | union afs_dirent *dire; | |
238 | unsigned offset, next, curr; | |
239 | size_t nlen; | |
240 | int tmp, ret; | |
241 | ||
242 | _enter("%u,%x,%p,,",*fpos,blkoff,block); | |
243 | ||
244 | curr = (*fpos - blkoff) / sizeof(union afs_dirent); | |
245 | ||
246 | /* walk through the block, an entry at a time */ | |
247 | for (offset = AFS_DIRENT_PER_BLOCK - block->pagehdr.nentries; | |
248 | offset < AFS_DIRENT_PER_BLOCK; | |
249 | offset = next | |
250 | ) { | |
251 | next = offset + 1; | |
252 | ||
253 | /* skip entries marked unused in the bitmap */ | |
254 | if (!(block->pagehdr.bitmap[offset / 8] & | |
255 | (1 << (offset % 8)))) { | |
08e0e7c8 | 256 | _debug("ENT[%Zu.%u]: unused", |
1da177e4 LT |
257 | blkoff / sizeof(union afs_dir_block), offset); |
258 | if (offset >= curr) | |
259 | *fpos = blkoff + | |
260 | next * sizeof(union afs_dirent); | |
261 | continue; | |
262 | } | |
263 | ||
264 | /* got a valid entry */ | |
265 | dire = &block->dirents[offset]; | |
266 | nlen = strnlen(dire->u.name, | |
267 | sizeof(*block) - | |
268 | offset * sizeof(union afs_dirent)); | |
269 | ||
08e0e7c8 | 270 | _debug("ENT[%Zu.%u]: %s %Zu \"%s\"", |
1da177e4 LT |
271 | blkoff / sizeof(union afs_dir_block), offset, |
272 | (offset < curr ? "skip" : "fill"), | |
273 | nlen, dire->u.name); | |
274 | ||
275 | /* work out where the next possible entry is */ | |
276 | for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_dirent)) { | |
277 | if (next >= AFS_DIRENT_PER_BLOCK) { | |
278 | _debug("ENT[%Zu.%u]:" | |
279 | " %u travelled beyond end dir block" | |
08e0e7c8 | 280 | " (len %u/%Zu)", |
1da177e4 LT |
281 | blkoff / sizeof(union afs_dir_block), |
282 | offset, next, tmp, nlen); | |
283 | return -EIO; | |
284 | } | |
285 | if (!(block->pagehdr.bitmap[next / 8] & | |
286 | (1 << (next % 8)))) { | |
287 | _debug("ENT[%Zu.%u]:" | |
08e0e7c8 | 288 | " %u unmarked extension (len %u/%Zu)", |
1da177e4 LT |
289 | blkoff / sizeof(union afs_dir_block), |
290 | offset, next, tmp, nlen); | |
291 | return -EIO; | |
292 | } | |
293 | ||
08e0e7c8 | 294 | _debug("ENT[%Zu.%u]: ext %u/%Zu", |
1da177e4 LT |
295 | blkoff / sizeof(union afs_dir_block), |
296 | next, tmp, nlen); | |
297 | next++; | |
298 | } | |
299 | ||
300 | /* skip if starts before the current position */ | |
301 | if (offset < curr) | |
302 | continue; | |
303 | ||
304 | /* found the next entry */ | |
305 | ret = filldir(cookie, | |
306 | dire->u.name, | |
307 | nlen, | |
308 | blkoff + offset * sizeof(union afs_dirent), | |
309 | ntohl(dire->u.vnode), | |
260a9803 | 310 | filldir == afs_lookup_filldir ? |
1da177e4 LT |
311 | ntohl(dire->u.unique) : DT_UNKNOWN); |
312 | if (ret < 0) { | |
313 | _leave(" = 0 [full]"); | |
314 | return 0; | |
315 | } | |
316 | ||
317 | *fpos = blkoff + next * sizeof(union afs_dirent); | |
318 | } | |
319 | ||
320 | _leave(" = 1 [more]"); | |
321 | return 1; | |
ec26815a | 322 | } |
1da177e4 | 323 | |
1da177e4 | 324 | /* |
08e0e7c8 | 325 | * iterate through the data blob that lists the contents of an AFS directory |
1da177e4 LT |
326 | */ |
327 | static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, | |
00d3b7a4 | 328 | filldir_t filldir, struct key *key) |
1da177e4 | 329 | { |
08e0e7c8 | 330 | union afs_dir_block *dblock; |
1da177e4 LT |
331 | struct afs_dir_page *dbuf; |
332 | struct page *page; | |
333 | unsigned blkoff, limit; | |
334 | int ret; | |
335 | ||
336 | _enter("{%lu},%u,,", dir->i_ino, *fpos); | |
337 | ||
08e0e7c8 | 338 | if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { |
1da177e4 LT |
339 | _leave(" = -ESTALE"); |
340 | return -ESTALE; | |
341 | } | |
342 | ||
343 | /* round the file position up to the next entry boundary */ | |
344 | *fpos += sizeof(union afs_dirent) - 1; | |
345 | *fpos &= ~(sizeof(union afs_dirent) - 1); | |
346 | ||
347 | /* walk through the blocks in sequence */ | |
348 | ret = 0; | |
349 | while (*fpos < dir->i_size) { | |
350 | blkoff = *fpos & ~(sizeof(union afs_dir_block) - 1); | |
351 | ||
352 | /* fetch the appropriate page from the directory */ | |
00d3b7a4 | 353 | page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key); |
1da177e4 LT |
354 | if (IS_ERR(page)) { |
355 | ret = PTR_ERR(page); | |
356 | break; | |
357 | } | |
358 | ||
359 | limit = blkoff & ~(PAGE_SIZE - 1); | |
360 | ||
361 | dbuf = page_address(page); | |
362 | ||
363 | /* deal with the individual blocks stashed on this page */ | |
364 | do { | |
365 | dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / | |
366 | sizeof(union afs_dir_block)]; | |
367 | ret = afs_dir_iterate_block(fpos, dblock, blkoff, | |
368 | cookie, filldir); | |
369 | if (ret != 1) { | |
370 | afs_dir_put_page(page); | |
371 | goto out; | |
372 | } | |
373 | ||
374 | blkoff += sizeof(union afs_dir_block); | |
375 | ||
376 | } while (*fpos < dir->i_size && blkoff < limit); | |
377 | ||
378 | afs_dir_put_page(page); | |
379 | ret = 0; | |
380 | } | |
381 | ||
ec26815a | 382 | out: |
1da177e4 LT |
383 | _leave(" = %d", ret); |
384 | return ret; | |
ec26815a | 385 | } |
1da177e4 | 386 | |
1da177e4 LT |
387 | /* |
388 | * read an AFS directory | |
389 | */ | |
260a9803 | 390 | static int afs_readdir(struct file *file, void *cookie, filldir_t filldir) |
1da177e4 LT |
391 | { |
392 | unsigned fpos; | |
393 | int ret; | |
394 | ||
08e0e7c8 DH |
395 | _enter("{%Ld,{%lu}}", |
396 | file->f_pos, file->f_path.dentry->d_inode->i_ino); | |
1da177e4 | 397 | |
00d3b7a4 DH |
398 | ASSERT(file->private_data != NULL); |
399 | ||
1da177e4 | 400 | fpos = file->f_pos; |
08e0e7c8 | 401 | ret = afs_dir_iterate(file->f_path.dentry->d_inode, &fpos, |
00d3b7a4 | 402 | cookie, filldir, file->private_data); |
1da177e4 LT |
403 | file->f_pos = fpos; |
404 | ||
405 | _leave(" = %d", ret); | |
406 | return ret; | |
ec26815a | 407 | } |
1da177e4 | 408 | |
1da177e4 LT |
409 | /* |
410 | * search the directory for a name | |
411 | * - if afs_dir_iterate_block() spots this function, it'll pass the FID | |
412 | * uniquifier through dtype | |
413 | */ | |
260a9803 DH |
414 | static int afs_lookup_filldir(void *_cookie, const char *name, int nlen, |
415 | loff_t fpos, u64 ino, unsigned dtype) | |
1da177e4 | 416 | { |
260a9803 | 417 | struct afs_lookup_cookie *cookie = _cookie; |
1da177e4 | 418 | |
08e0e7c8 | 419 | _enter("{%s,%Zu},%s,%u,,%llu,%u", |
ba3e0e1a DM |
420 | cookie->name, cookie->nlen, name, nlen, |
421 | (unsigned long long) ino, dtype); | |
1da177e4 | 422 | |
08e0e7c8 DH |
423 | /* insanity checks first */ |
424 | BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); | |
425 | BUILD_BUG_ON(sizeof(union afs_dirent) != 32); | |
426 | ||
1da177e4 LT |
427 | if (cookie->nlen != nlen || memcmp(cookie->name, name, nlen) != 0) { |
428 | _leave(" = 0 [no]"); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | cookie->fid.vnode = ino; | |
433 | cookie->fid.unique = dtype; | |
434 | cookie->found = 1; | |
435 | ||
436 | _leave(" = -1 [found]"); | |
437 | return -1; | |
ec26815a | 438 | } |
1da177e4 | 439 | |
1da177e4 | 440 | /* |
08e0e7c8 | 441 | * do a lookup in a directory |
260a9803 | 442 | * - just returns the FID the dentry name maps to if found |
1da177e4 | 443 | */ |
08e0e7c8 | 444 | static int afs_do_lookup(struct inode *dir, struct dentry *dentry, |
00d3b7a4 | 445 | struct afs_fid *fid, struct key *key) |
1da177e4 | 446 | { |
260a9803 | 447 | struct afs_lookup_cookie cookie; |
1da177e4 | 448 | struct afs_super_info *as; |
1da177e4 LT |
449 | unsigned fpos; |
450 | int ret; | |
451 | ||
08e0e7c8 | 452 | _enter("{%lu},%p{%s},", dir->i_ino, dentry, dentry->d_name.name); |
1da177e4 LT |
453 | |
454 | as = dir->i_sb->s_fs_info; | |
455 | ||
456 | /* search the directory */ | |
457 | cookie.name = dentry->d_name.name; | |
458 | cookie.nlen = dentry->d_name.len; | |
459 | cookie.fid.vid = as->volume->vid; | |
460 | cookie.found = 0; | |
461 | ||
462 | fpos = 0; | |
260a9803 | 463 | ret = afs_dir_iterate(dir, &fpos, &cookie, afs_lookup_filldir, |
00d3b7a4 | 464 | key); |
1da177e4 | 465 | if (ret < 0) { |
08e0e7c8 DH |
466 | _leave(" = %d [iter]", ret); |
467 | return ret; | |
1da177e4 LT |
468 | } |
469 | ||
470 | ret = -ENOENT; | |
471 | if (!cookie.found) { | |
08e0e7c8 DH |
472 | _leave(" = -ENOENT [not found]"); |
473 | return -ENOENT; | |
1da177e4 LT |
474 | } |
475 | ||
08e0e7c8 DH |
476 | *fid = cookie.fid; |
477 | _leave(" = 0 { vn=%u u=%u }", fid->vnode, fid->unique); | |
478 | return 0; | |
479 | } | |
480 | ||
481 | /* | |
482 | * look up an entry in a directory | |
483 | */ | |
260a9803 DH |
484 | static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, |
485 | struct nameidata *nd) | |
08e0e7c8 DH |
486 | { |
487 | struct afs_vnode *vnode; | |
488 | struct afs_fid fid; | |
489 | struct inode *inode; | |
00d3b7a4 | 490 | struct key *key; |
08e0e7c8 DH |
491 | int ret; |
492 | ||
260a9803 DH |
493 | vnode = AFS_FS_I(dir); |
494 | ||
416351f2 | 495 | _enter("{%x:%u},%p{%s},", |
260a9803 DH |
496 | vnode->fid.vid, vnode->fid.vnode, dentry, dentry->d_name.name); |
497 | ||
498 | ASSERTCMP(dentry->d_inode, ==, NULL); | |
08e0e7c8 | 499 | |
45222b9e | 500 | if (dentry->d_name.len >= AFSNAMEMAX) { |
08e0e7c8 DH |
501 | _leave(" = -ENAMETOOLONG"); |
502 | return ERR_PTR(-ENAMETOOLONG); | |
503 | } | |
504 | ||
08e0e7c8 DH |
505 | if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { |
506 | _leave(" = -ESTALE"); | |
507 | return ERR_PTR(-ESTALE); | |
508 | } | |
509 | ||
00d3b7a4 DH |
510 | key = afs_request_key(vnode->volume->cell); |
511 | if (IS_ERR(key)) { | |
512 | _leave(" = %ld [key]", PTR_ERR(key)); | |
513 | return ERR_PTR(PTR_ERR(key)); | |
514 | } | |
515 | ||
260a9803 DH |
516 | ret = afs_validate(vnode, key); |
517 | if (ret < 0) { | |
518 | key_put(key); | |
519 | _leave(" = %d [val]", ret); | |
520 | return ERR_PTR(ret); | |
521 | } | |
522 | ||
00d3b7a4 | 523 | ret = afs_do_lookup(dir, dentry, &fid, key); |
1da177e4 | 524 | if (ret < 0) { |
00d3b7a4 | 525 | key_put(key); |
260a9803 DH |
526 | if (ret == -ENOENT) { |
527 | d_add(dentry, NULL); | |
528 | _leave(" = NULL [negative]"); | |
529 | return NULL; | |
530 | } | |
08e0e7c8 | 531 | _leave(" = %d [do]", ret); |
1da177e4 LT |
532 | return ERR_PTR(ret); |
533 | } | |
260a9803 | 534 | dentry->d_fsdata = (void *)(unsigned long) vnode->status.data_version; |
1da177e4 | 535 | |
08e0e7c8 | 536 | /* instantiate the dentry */ |
260a9803 | 537 | inode = afs_iget(dir->i_sb, key, &fid, NULL, NULL); |
00d3b7a4 | 538 | key_put(key); |
08e0e7c8 DH |
539 | if (IS_ERR(inode)) { |
540 | _leave(" = %ld", PTR_ERR(inode)); | |
541 | return ERR_PTR(PTR_ERR(inode)); | |
542 | } | |
543 | ||
1da177e4 | 544 | dentry->d_op = &afs_fs_dentry_operations; |
1da177e4 LT |
545 | |
546 | d_add(dentry, inode); | |
547 | _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%lu }", | |
08e0e7c8 DH |
548 | fid.vnode, |
549 | fid.unique, | |
1da177e4 LT |
550 | dentry->d_inode->i_ino, |
551 | dentry->d_inode->i_version); | |
552 | ||
553 | return NULL; | |
ec26815a | 554 | } |
1da177e4 | 555 | |
1da177e4 LT |
556 | /* |
557 | * check that a dentry lookup hit has found a valid entry | |
558 | * - NOTE! the hit can be a negative hit too, so we can't assume we have an | |
559 | * inode | |
1da177e4 LT |
560 | */ |
561 | static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd) | |
562 | { | |
260a9803 | 563 | struct afs_vnode *vnode, *dir; |
08e0e7c8 | 564 | struct afs_fid fid; |
1da177e4 | 565 | struct dentry *parent; |
00d3b7a4 | 566 | struct key *key; |
260a9803 | 567 | void *dir_version; |
1da177e4 LT |
568 | int ret; |
569 | ||
08e0e7c8 DH |
570 | vnode = AFS_FS_I(dentry->d_inode); |
571 | ||
260a9803 DH |
572 | if (dentry->d_inode) |
573 | _enter("{v={%x:%u} n=%s fl=%lx},", | |
574 | vnode->fid.vid, vnode->fid.vnode, dentry->d_name.name, | |
575 | vnode->flags); | |
576 | else | |
577 | _enter("{neg n=%s}", dentry->d_name.name); | |
1da177e4 | 578 | |
260a9803 | 579 | key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); |
00d3b7a4 DH |
580 | if (IS_ERR(key)) |
581 | key = NULL; | |
582 | ||
1da177e4 | 583 | /* lock down the parent dentry so we can peer at it */ |
08e0e7c8 | 584 | parent = dget_parent(dentry); |
260a9803 | 585 | if (!parent->d_inode) |
1da177e4 LT |
586 | goto out_bad; |
587 | ||
260a9803 | 588 | dir = AFS_FS_I(parent->d_inode); |
1da177e4 | 589 | |
260a9803 DH |
590 | /* validate the parent directory */ |
591 | if (test_bit(AFS_VNODE_MODIFIED, &dir->flags)) | |
592 | afs_validate(dir, key); | |
593 | ||
594 | if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { | |
1da177e4 LT |
595 | _debug("%s: parent dir deleted", dentry->d_name.name); |
596 | goto out_bad; | |
597 | } | |
598 | ||
260a9803 DH |
599 | dir_version = (void *) (unsigned long) dir->status.data_version; |
600 | if (dentry->d_fsdata == dir_version) | |
601 | goto out_valid; /* the dir contents are unchanged */ | |
1da177e4 | 602 | |
260a9803 DH |
603 | _debug("dir modified"); |
604 | ||
605 | /* search the directory for this vnode */ | |
606 | ret = afs_do_lookup(&dir->vfs_inode, dentry, &fid, key); | |
607 | switch (ret) { | |
608 | case 0: | |
609 | /* the filename maps to something */ | |
610 | if (!dentry->d_inode) | |
611 | goto out_bad; | |
612 | if (is_bad_inode(dentry->d_inode)) { | |
613 | printk("kAFS: afs_d_revalidate: %s/%s has bad inode\n", | |
614 | parent->d_name.name, dentry->d_name.name); | |
1da177e4 LT |
615 | goto out_bad; |
616 | } | |
617 | ||
1da177e4 LT |
618 | /* if the vnode ID has changed, then the dirent points to a |
619 | * different file */ | |
08e0e7c8 DH |
620 | if (fid.vnode != vnode->fid.vnode) { |
621 | _debug("%s: dirent changed [%u != %u]", | |
622 | dentry->d_name.name, fid.vnode, | |
623 | vnode->fid.vnode); | |
1da177e4 LT |
624 | goto not_found; |
625 | } | |
626 | ||
627 | /* if the vnode ID uniqifier has changed, then the file has | |
260a9803 DH |
628 | * been deleted and replaced, and the original vnode ID has |
629 | * been reused */ | |
08e0e7c8 | 630 | if (fid.unique != vnode->fid.unique) { |
1da177e4 | 631 | _debug("%s: file deleted (uq %u -> %u I:%lu)", |
08e0e7c8 | 632 | dentry->d_name.name, fid.unique, |
260a9803 | 633 | vnode->fid.unique, dentry->d_inode->i_version); |
08e0e7c8 DH |
634 | spin_lock(&vnode->lock); |
635 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
636 | spin_unlock(&vnode->lock); | |
260a9803 | 637 | goto not_found; |
1da177e4 | 638 | } |
260a9803 | 639 | goto out_valid; |
08e0e7c8 | 640 | |
260a9803 DH |
641 | case -ENOENT: |
642 | /* the filename is unknown */ | |
643 | _debug("%s: dirent not found", dentry->d_name.name); | |
644 | if (dentry->d_inode) | |
645 | goto not_found; | |
646 | goto out_valid; | |
1da177e4 | 647 | |
260a9803 DH |
648 | default: |
649 | _debug("failed to iterate dir %s: %d", | |
650 | parent->d_name.name, ret); | |
08e0e7c8 DH |
651 | goto out_bad; |
652 | } | |
653 | ||
ec26815a | 654 | out_valid: |
260a9803 DH |
655 | dentry->d_fsdata = dir_version; |
656 | out_skip: | |
1da177e4 | 657 | dput(parent); |
00d3b7a4 | 658 | key_put(key); |
1da177e4 LT |
659 | _leave(" = 1 [valid]"); |
660 | return 1; | |
661 | ||
662 | /* the dirent, if it exists, now points to a different vnode */ | |
ec26815a | 663 | not_found: |
1da177e4 LT |
664 | spin_lock(&dentry->d_lock); |
665 | dentry->d_flags |= DCACHE_NFSFS_RENAMED; | |
666 | spin_unlock(&dentry->d_lock); | |
667 | ||
ec26815a | 668 | out_bad: |
260a9803 | 669 | if (dentry->d_inode) { |
1da177e4 LT |
670 | /* don't unhash if we have submounts */ |
671 | if (have_submounts(dentry)) | |
260a9803 | 672 | goto out_skip; |
1da177e4 LT |
673 | } |
674 | ||
1da177e4 | 675 | _debug("dropping dentry %s/%s", |
08e0e7c8 DH |
676 | parent->d_name.name, dentry->d_name.name); |
677 | shrink_dcache_parent(dentry); | |
1da177e4 | 678 | d_drop(dentry); |
1da177e4 | 679 | dput(parent); |
00d3b7a4 | 680 | key_put(key); |
1da177e4 LT |
681 | |
682 | _leave(" = 0 [bad]"); | |
683 | return 0; | |
ec26815a | 684 | } |
1da177e4 | 685 | |
1da177e4 LT |
686 | /* |
687 | * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't | |
688 | * sleep) | |
689 | * - called from dput() when d_count is going to 0. | |
690 | * - return 1 to request dentry be unhashed, 0 otherwise | |
691 | */ | |
692 | static int afs_d_delete(struct dentry *dentry) | |
693 | { | |
694 | _enter("%s", dentry->d_name.name); | |
695 | ||
696 | if (dentry->d_flags & DCACHE_NFSFS_RENAMED) | |
697 | goto zap; | |
698 | ||
08e0e7c8 DH |
699 | if (dentry->d_inode && |
700 | test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dentry->d_inode)->flags)) | |
1da177e4 | 701 | goto zap; |
1da177e4 LT |
702 | |
703 | _leave(" = 0 [keep]"); | |
704 | return 0; | |
705 | ||
ec26815a | 706 | zap: |
1da177e4 LT |
707 | _leave(" = 1 [zap]"); |
708 | return 1; | |
ec26815a | 709 | } |
260a9803 DH |
710 | |
711 | /* | |
712 | * handle dentry release | |
713 | */ | |
714 | static void afs_d_release(struct dentry *dentry) | |
715 | { | |
716 | _enter("%s", dentry->d_name.name); | |
717 | } | |
718 | ||
719 | /* | |
720 | * create a directory on an AFS filesystem | |
721 | */ | |
722 | static int afs_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
723 | { | |
724 | struct afs_file_status status; | |
725 | struct afs_callback cb; | |
726 | struct afs_server *server; | |
727 | struct afs_vnode *dvnode, *vnode; | |
728 | struct afs_fid fid; | |
729 | struct inode *inode; | |
730 | struct key *key; | |
731 | int ret; | |
732 | ||
733 | dvnode = AFS_FS_I(dir); | |
734 | ||
416351f2 | 735 | _enter("{%x:%u},{%s},%o", |
260a9803 DH |
736 | dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode); |
737 | ||
738 | ret = -ENAMETOOLONG; | |
45222b9e | 739 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
740 | goto error; |
741 | ||
742 | key = afs_request_key(dvnode->volume->cell); | |
743 | if (IS_ERR(key)) { | |
744 | ret = PTR_ERR(key); | |
745 | goto error; | |
746 | } | |
747 | ||
748 | mode |= S_IFDIR; | |
749 | ret = afs_vnode_create(dvnode, key, dentry->d_name.name, | |
750 | mode, &fid, &status, &cb, &server); | |
751 | if (ret < 0) | |
752 | goto mkdir_error; | |
753 | ||
754 | inode = afs_iget(dir->i_sb, key, &fid, &status, &cb); | |
755 | if (IS_ERR(inode)) { | |
756 | /* ENOMEM at a really inconvenient time - just abandon the new | |
757 | * directory on the server */ | |
758 | ret = PTR_ERR(inode); | |
759 | goto iget_error; | |
760 | } | |
761 | ||
762 | /* apply the status report we've got for the new vnode */ | |
763 | vnode = AFS_FS_I(inode); | |
764 | spin_lock(&vnode->lock); | |
765 | vnode->update_cnt++; | |
766 | spin_unlock(&vnode->lock); | |
767 | afs_vnode_finalise_status_update(vnode, server); | |
768 | afs_put_server(server); | |
769 | ||
770 | d_instantiate(dentry, inode); | |
771 | if (d_unhashed(dentry)) { | |
772 | _debug("not hashed"); | |
773 | d_rehash(dentry); | |
774 | } | |
775 | key_put(key); | |
776 | _leave(" = 0"); | |
777 | return 0; | |
778 | ||
779 | iget_error: | |
780 | afs_put_server(server); | |
781 | mkdir_error: | |
782 | key_put(key); | |
783 | error: | |
784 | d_drop(dentry); | |
785 | _leave(" = %d", ret); | |
786 | return ret; | |
787 | } | |
788 | ||
789 | /* | |
790 | * remove a directory from an AFS filesystem | |
791 | */ | |
792 | static int afs_rmdir(struct inode *dir, struct dentry *dentry) | |
793 | { | |
794 | struct afs_vnode *dvnode, *vnode; | |
795 | struct key *key; | |
796 | int ret; | |
797 | ||
798 | dvnode = AFS_FS_I(dir); | |
799 | ||
416351f2 | 800 | _enter("{%x:%u},{%s}", |
260a9803 DH |
801 | dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name); |
802 | ||
803 | ret = -ENAMETOOLONG; | |
45222b9e | 804 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
805 | goto error; |
806 | ||
807 | key = afs_request_key(dvnode->volume->cell); | |
808 | if (IS_ERR(key)) { | |
809 | ret = PTR_ERR(key); | |
810 | goto error; | |
811 | } | |
812 | ||
813 | ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, true); | |
814 | if (ret < 0) | |
815 | goto rmdir_error; | |
816 | ||
817 | if (dentry->d_inode) { | |
818 | vnode = AFS_FS_I(dentry->d_inode); | |
819 | clear_nlink(&vnode->vfs_inode); | |
820 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
821 | afs_discard_callback_on_delete(vnode); | |
822 | } | |
823 | ||
824 | key_put(key); | |
825 | _leave(" = 0"); | |
826 | return 0; | |
827 | ||
828 | rmdir_error: | |
829 | key_put(key); | |
830 | error: | |
831 | _leave(" = %d", ret); | |
832 | return ret; | |
833 | } | |
834 | ||
835 | /* | |
836 | * remove a file from an AFS filesystem | |
837 | */ | |
838 | static int afs_unlink(struct inode *dir, struct dentry *dentry) | |
839 | { | |
840 | struct afs_vnode *dvnode, *vnode; | |
841 | struct key *key; | |
842 | int ret; | |
843 | ||
844 | dvnode = AFS_FS_I(dir); | |
845 | ||
416351f2 | 846 | _enter("{%x:%u},{%s}", |
260a9803 DH |
847 | dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name); |
848 | ||
849 | ret = -ENAMETOOLONG; | |
45222b9e | 850 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
851 | goto error; |
852 | ||
853 | key = afs_request_key(dvnode->volume->cell); | |
854 | if (IS_ERR(key)) { | |
855 | ret = PTR_ERR(key); | |
856 | goto error; | |
857 | } | |
858 | ||
859 | if (dentry->d_inode) { | |
860 | vnode = AFS_FS_I(dentry->d_inode); | |
861 | ||
862 | /* make sure we have a callback promise on the victim */ | |
863 | ret = afs_validate(vnode, key); | |
864 | if (ret < 0) | |
865 | goto error; | |
866 | } | |
867 | ||
868 | ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, false); | |
869 | if (ret < 0) | |
870 | goto remove_error; | |
871 | ||
872 | if (dentry->d_inode) { | |
873 | /* if the file wasn't deleted due to excess hard links, the | |
874 | * fileserver will break the callback promise on the file - if | |
875 | * it had one - before it returns to us, and if it was deleted, | |
876 | * it won't | |
877 | * | |
878 | * however, if we didn't have a callback promise outstanding, | |
879 | * or it was outstanding on a different server, then it won't | |
880 | * break it either... | |
881 | */ | |
882 | vnode = AFS_FS_I(dentry->d_inode); | |
883 | if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) | |
884 | _debug("AFS_VNODE_DELETED"); | |
885 | if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) | |
886 | _debug("AFS_VNODE_CB_BROKEN"); | |
887 | set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags); | |
888 | ret = afs_validate(vnode, key); | |
889 | _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); | |
890 | } | |
891 | ||
892 | key_put(key); | |
893 | _leave(" = 0"); | |
894 | return 0; | |
895 | ||
896 | remove_error: | |
897 | key_put(key); | |
898 | error: | |
899 | _leave(" = %d", ret); | |
900 | return ret; | |
901 | } | |
902 | ||
903 | /* | |
904 | * create a regular file on an AFS filesystem | |
905 | */ | |
906 | static int afs_create(struct inode *dir, struct dentry *dentry, int mode, | |
907 | struct nameidata *nd) | |
908 | { | |
909 | struct afs_file_status status; | |
910 | struct afs_callback cb; | |
911 | struct afs_server *server; | |
912 | struct afs_vnode *dvnode, *vnode; | |
913 | struct afs_fid fid; | |
914 | struct inode *inode; | |
915 | struct key *key; | |
916 | int ret; | |
917 | ||
918 | dvnode = AFS_FS_I(dir); | |
919 | ||
416351f2 | 920 | _enter("{%x:%u},{%s},%o,", |
260a9803 DH |
921 | dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode); |
922 | ||
923 | ret = -ENAMETOOLONG; | |
45222b9e | 924 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
925 | goto error; |
926 | ||
927 | key = afs_request_key(dvnode->volume->cell); | |
928 | if (IS_ERR(key)) { | |
929 | ret = PTR_ERR(key); | |
930 | goto error; | |
931 | } | |
932 | ||
933 | mode |= S_IFREG; | |
934 | ret = afs_vnode_create(dvnode, key, dentry->d_name.name, | |
935 | mode, &fid, &status, &cb, &server); | |
936 | if (ret < 0) | |
937 | goto create_error; | |
938 | ||
939 | inode = afs_iget(dir->i_sb, key, &fid, &status, &cb); | |
940 | if (IS_ERR(inode)) { | |
941 | /* ENOMEM at a really inconvenient time - just abandon the new | |
942 | * directory on the server */ | |
943 | ret = PTR_ERR(inode); | |
944 | goto iget_error; | |
945 | } | |
946 | ||
947 | /* apply the status report we've got for the new vnode */ | |
948 | vnode = AFS_FS_I(inode); | |
949 | spin_lock(&vnode->lock); | |
950 | vnode->update_cnt++; | |
951 | spin_unlock(&vnode->lock); | |
952 | afs_vnode_finalise_status_update(vnode, server); | |
953 | afs_put_server(server); | |
954 | ||
955 | d_instantiate(dentry, inode); | |
956 | if (d_unhashed(dentry)) { | |
957 | _debug("not hashed"); | |
958 | d_rehash(dentry); | |
959 | } | |
960 | key_put(key); | |
961 | _leave(" = 0"); | |
962 | return 0; | |
963 | ||
964 | iget_error: | |
965 | afs_put_server(server); | |
966 | create_error: | |
967 | key_put(key); | |
968 | error: | |
969 | d_drop(dentry); | |
970 | _leave(" = %d", ret); | |
971 | return ret; | |
972 | } | |
973 | ||
974 | /* | |
975 | * create a hard link between files in an AFS filesystem | |
976 | */ | |
977 | static int afs_link(struct dentry *from, struct inode *dir, | |
978 | struct dentry *dentry) | |
979 | { | |
980 | struct afs_vnode *dvnode, *vnode; | |
981 | struct key *key; | |
982 | int ret; | |
983 | ||
984 | vnode = AFS_FS_I(from->d_inode); | |
985 | dvnode = AFS_FS_I(dir); | |
986 | ||
416351f2 | 987 | _enter("{%x:%u},{%x:%u},{%s}", |
260a9803 DH |
988 | vnode->fid.vid, vnode->fid.vnode, |
989 | dvnode->fid.vid, dvnode->fid.vnode, | |
990 | dentry->d_name.name); | |
991 | ||
992 | ret = -ENAMETOOLONG; | |
45222b9e | 993 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
994 | goto error; |
995 | ||
996 | key = afs_request_key(dvnode->volume->cell); | |
997 | if (IS_ERR(key)) { | |
998 | ret = PTR_ERR(key); | |
999 | goto error; | |
1000 | } | |
1001 | ||
1002 | ret = afs_vnode_link(dvnode, vnode, key, dentry->d_name.name); | |
1003 | if (ret < 0) | |
1004 | goto link_error; | |
1005 | ||
1006 | atomic_inc(&vnode->vfs_inode.i_count); | |
1007 | d_instantiate(dentry, &vnode->vfs_inode); | |
1008 | key_put(key); | |
1009 | _leave(" = 0"); | |
1010 | return 0; | |
1011 | ||
1012 | link_error: | |
1013 | key_put(key); | |
1014 | error: | |
1015 | d_drop(dentry); | |
1016 | _leave(" = %d", ret); | |
1017 | return ret; | |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | * create a symlink in an AFS filesystem | |
1022 | */ | |
1023 | static int afs_symlink(struct inode *dir, struct dentry *dentry, | |
1024 | const char *content) | |
1025 | { | |
1026 | struct afs_file_status status; | |
1027 | struct afs_server *server; | |
1028 | struct afs_vnode *dvnode, *vnode; | |
1029 | struct afs_fid fid; | |
1030 | struct inode *inode; | |
1031 | struct key *key; | |
1032 | int ret; | |
1033 | ||
1034 | dvnode = AFS_FS_I(dir); | |
1035 | ||
416351f2 | 1036 | _enter("{%x:%u},{%s},%s", |
260a9803 DH |
1037 | dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, |
1038 | content); | |
1039 | ||
1040 | ret = -ENAMETOOLONG; | |
45222b9e | 1041 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
1042 | goto error; |
1043 | ||
1044 | ret = -EINVAL; | |
45222b9e | 1045 | if (strlen(content) >= AFSPATHMAX) |
260a9803 DH |
1046 | goto error; |
1047 | ||
1048 | key = afs_request_key(dvnode->volume->cell); | |
1049 | if (IS_ERR(key)) { | |
1050 | ret = PTR_ERR(key); | |
1051 | goto error; | |
1052 | } | |
1053 | ||
1054 | ret = afs_vnode_symlink(dvnode, key, dentry->d_name.name, content, | |
1055 | &fid, &status, &server); | |
1056 | if (ret < 0) | |
1057 | goto create_error; | |
1058 | ||
1059 | inode = afs_iget(dir->i_sb, key, &fid, &status, NULL); | |
1060 | if (IS_ERR(inode)) { | |
1061 | /* ENOMEM at a really inconvenient time - just abandon the new | |
1062 | * directory on the server */ | |
1063 | ret = PTR_ERR(inode); | |
1064 | goto iget_error; | |
1065 | } | |
1066 | ||
1067 | /* apply the status report we've got for the new vnode */ | |
1068 | vnode = AFS_FS_I(inode); | |
1069 | spin_lock(&vnode->lock); | |
1070 | vnode->update_cnt++; | |
1071 | spin_unlock(&vnode->lock); | |
1072 | afs_vnode_finalise_status_update(vnode, server); | |
1073 | afs_put_server(server); | |
1074 | ||
1075 | d_instantiate(dentry, inode); | |
1076 | if (d_unhashed(dentry)) { | |
1077 | _debug("not hashed"); | |
1078 | d_rehash(dentry); | |
1079 | } | |
1080 | key_put(key); | |
1081 | _leave(" = 0"); | |
1082 | return 0; | |
1083 | ||
1084 | iget_error: | |
1085 | afs_put_server(server); | |
1086 | create_error: | |
1087 | key_put(key); | |
1088 | error: | |
1089 | d_drop(dentry); | |
1090 | _leave(" = %d", ret); | |
1091 | return ret; | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * rename a file in an AFS filesystem and/or move it between directories | |
1096 | */ | |
1097 | static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1098 | struct inode *new_dir, struct dentry *new_dentry) | |
1099 | { | |
1100 | struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; | |
1101 | struct key *key; | |
1102 | int ret; | |
1103 | ||
1104 | vnode = AFS_FS_I(old_dentry->d_inode); | |
1105 | orig_dvnode = AFS_FS_I(old_dir); | |
1106 | new_dvnode = AFS_FS_I(new_dir); | |
1107 | ||
416351f2 | 1108 | _enter("{%x:%u},{%x:%u},{%x:%u},{%s}", |
260a9803 DH |
1109 | orig_dvnode->fid.vid, orig_dvnode->fid.vnode, |
1110 | vnode->fid.vid, vnode->fid.vnode, | |
1111 | new_dvnode->fid.vid, new_dvnode->fid.vnode, | |
1112 | new_dentry->d_name.name); | |
1113 | ||
1114 | ret = -ENAMETOOLONG; | |
45222b9e | 1115 | if (new_dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
1116 | goto error; |
1117 | ||
1118 | key = afs_request_key(orig_dvnode->volume->cell); | |
1119 | if (IS_ERR(key)) { | |
1120 | ret = PTR_ERR(key); | |
1121 | goto error; | |
1122 | } | |
1123 | ||
1124 | ret = afs_vnode_rename(orig_dvnode, new_dvnode, key, | |
1125 | old_dentry->d_name.name, | |
1126 | new_dentry->d_name.name); | |
1127 | if (ret < 0) | |
1128 | goto rename_error; | |
1129 | key_put(key); | |
1130 | _leave(" = 0"); | |
1131 | return 0; | |
1132 | ||
1133 | rename_error: | |
1134 | key_put(key); | |
1135 | error: | |
1136 | d_drop(new_dentry); | |
1137 | _leave(" = %d", ret); | |
1138 | return ret; | |
1139 | } |