Commit | Line | Data |
---|---|---|
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> |
e8edc6e0 | 19 | #include <linux/sched.h> |
1da177e4 LT |
20 | #include "internal.h" |
21 | ||
260a9803 DH |
22 | static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, |
23 | struct nameidata *nd); | |
1da177e4 | 24 | static int afs_dir_open(struct inode *inode, struct file *file); |
260a9803 | 25 | static int afs_readdir(struct file *file, void *dirent, filldir_t filldir); |
1da177e4 LT |
26 | static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd); |
27 | static int afs_d_delete(struct dentry *dentry); | |
260a9803 DH |
28 | static void afs_d_release(struct dentry *dentry); |
29 | static int afs_lookup_filldir(void *_cookie, const char *name, int nlen, | |
afefdbb2 | 30 | loff_t fpos, u64 ino, unsigned dtype); |
260a9803 DH |
31 | static int afs_create(struct inode *dir, struct dentry *dentry, int mode, |
32 | struct nameidata *nd); | |
33 | static int afs_mkdir(struct inode *dir, struct dentry *dentry, int mode); | |
34 | static int afs_rmdir(struct inode *dir, struct dentry *dentry); | |
35 | static int afs_unlink(struct inode *dir, struct dentry *dentry); | |
36 | static int afs_link(struct dentry *from, struct inode *dir, | |
37 | struct dentry *dentry); | |
38 | static int afs_symlink(struct inode *dir, struct dentry *dentry, | |
39 | const char *content); | |
40 | static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
41 | struct inode *new_dir, struct dentry *new_dentry); | |
1da177e4 | 42 | |
4b6f5d20 | 43 | const struct file_operations afs_dir_file_operations = { |
1da177e4 | 44 | .open = afs_dir_open, |
00d3b7a4 | 45 | .release = afs_release, |
260a9803 | 46 | .readdir = afs_readdir, |
1da177e4 LT |
47 | }; |
48 | ||
754661f1 | 49 | const struct inode_operations afs_dir_inode_operations = { |
260a9803 DH |
50 | .create = afs_create, |
51 | .lookup = afs_lookup, | |
52 | .link = afs_link, | |
53 | .unlink = afs_unlink, | |
54 | .symlink = afs_symlink, | |
55 | .mkdir = afs_mkdir, | |
56 | .rmdir = afs_rmdir, | |
57 | .rename = afs_rename, | |
00d3b7a4 | 58 | .permission = afs_permission, |
416351f2 | 59 | .getattr = afs_getattr, |
31143d5d | 60 | .setattr = afs_setattr, |
1da177e4 LT |
61 | }; |
62 | ||
63 | static struct dentry_operations afs_fs_dentry_operations = { | |
64 | .d_revalidate = afs_d_revalidate, | |
65 | .d_delete = afs_d_delete, | |
260a9803 | 66 | .d_release = afs_d_release, |
1da177e4 LT |
67 | }; |
68 | ||
69 | #define AFS_DIR_HASHTBL_SIZE 128 | |
70 | #define AFS_DIR_DIRENT_SIZE 32 | |
71 | #define AFS_DIRENT_PER_BLOCK 64 | |
72 | ||
73 | union afs_dirent { | |
74 | struct { | |
75 | uint8_t valid; | |
76 | uint8_t unused[1]; | |
77 | __be16 hash_next; | |
78 | __be32 vnode; | |
79 | __be32 unique; | |
80 | uint8_t name[16]; | |
81 | uint8_t overflow[4]; /* if any char of the name (inc | |
82 | * NUL) reaches here, consume | |
83 | * the next dirent too */ | |
84 | } u; | |
85 | uint8_t extended_name[32]; | |
86 | }; | |
87 | ||
88 | /* AFS directory page header (one at the beginning of every 2048-byte chunk) */ | |
89 | struct afs_dir_pagehdr { | |
90 | __be16 npages; | |
91 | __be16 magic; | |
92 | #define AFS_DIR_MAGIC htons(1234) | |
93 | uint8_t nentries; | |
94 | uint8_t bitmap[8]; | |
95 | uint8_t pad[19]; | |
96 | }; | |
97 | ||
98 | /* directory block layout */ | |
99 | union afs_dir_block { | |
100 | ||
101 | struct afs_dir_pagehdr pagehdr; | |
102 | ||
103 | struct { | |
104 | struct afs_dir_pagehdr pagehdr; | |
105 | uint8_t alloc_ctrs[128]; | |
106 | /* dir hash table */ | |
107 | uint16_t hashtable[AFS_DIR_HASHTBL_SIZE]; | |
108 | } hdr; | |
109 | ||
110 | union afs_dirent dirents[AFS_DIRENT_PER_BLOCK]; | |
111 | }; | |
112 | ||
113 | /* layout on a linux VM page */ | |
114 | struct afs_dir_page { | |
115 | union afs_dir_block blocks[PAGE_SIZE / sizeof(union afs_dir_block)]; | |
116 | }; | |
117 | ||
260a9803 | 118 | struct afs_lookup_cookie { |
1da177e4 LT |
119 | struct afs_fid fid; |
120 | const char *name; | |
121 | size_t nlen; | |
122 | int found; | |
123 | }; | |
124 | ||
1da177e4 LT |
125 | /* |
126 | * check that a directory page is valid | |
127 | */ | |
128 | static inline void afs_dir_check_page(struct inode *dir, struct page *page) | |
129 | { | |
130 | struct afs_dir_page *dbuf; | |
131 | loff_t latter; | |
132 | int tmp, qty; | |
133 | ||
134 | #if 0 | |
135 | /* check the page count */ | |
136 | qty = desc.size / sizeof(dbuf->blocks[0]); | |
137 | if (qty == 0) | |
138 | goto error; | |
139 | ||
08e0e7c8 | 140 | if (page->index == 0 && qty != ntohs(dbuf->blocks[0].pagehdr.npages)) { |
1da177e4 | 141 | printk("kAFS: %s(%lu): wrong number of dir blocks %d!=%hu\n", |
08e0e7c8 DH |
142 | __FUNCTION__, dir->i_ino, qty, |
143 | ntohs(dbuf->blocks[0].pagehdr.npages)); | |
1da177e4 LT |
144 | goto error; |
145 | } | |
146 | #endif | |
147 | ||
148 | /* determine how many magic numbers there should be in this page */ | |
54b21a79 | 149 | latter = dir->i_size - page_offset(page); |
1da177e4 LT |
150 | if (latter >= PAGE_SIZE) |
151 | qty = PAGE_SIZE; | |
152 | else | |
153 | qty = latter; | |
154 | qty /= sizeof(union afs_dir_block); | |
155 | ||
156 | /* check them */ | |
157 | dbuf = page_address(page); | |
158 | for (tmp = 0; tmp < qty; tmp++) { | |
159 | if (dbuf->blocks[tmp].pagehdr.magic != AFS_DIR_MAGIC) { | |
160 | printk("kAFS: %s(%lu): bad magic %d/%d is %04hx\n", | |
161 | __FUNCTION__, dir->i_ino, tmp, qty, | |
162 | ntohs(dbuf->blocks[tmp].pagehdr.magic)); | |
163 | goto error; | |
164 | } | |
165 | } | |
166 | ||
167 | SetPageChecked(page); | |
168 | return; | |
169 | ||
ec26815a | 170 | error: |
1da177e4 LT |
171 | SetPageChecked(page); |
172 | SetPageError(page); | |
ec26815a | 173 | } |
1da177e4 | 174 | |
1da177e4 LT |
175 | /* |
176 | * discard a page cached in the pagecache | |
177 | */ | |
178 | static inline void afs_dir_put_page(struct page *page) | |
179 | { | |
180 | kunmap(page); | |
181 | page_cache_release(page); | |
ec26815a | 182 | } |
1da177e4 | 183 | |
1da177e4 LT |
184 | /* |
185 | * get a page into the pagecache | |
186 | */ | |
00d3b7a4 DH |
187 | static struct page *afs_dir_get_page(struct inode *dir, unsigned long index, |
188 | struct key *key) | |
1da177e4 LT |
189 | { |
190 | struct page *page; | |
00d3b7a4 DH |
191 | struct file file = { |
192 | .private_data = key, | |
193 | }; | |
1da177e4 LT |
194 | |
195 | _enter("{%lu},%lu", dir->i_ino, index); | |
196 | ||
00d3b7a4 | 197 | page = read_mapping_page(dir->i_mapping, index, &file); |
1da177e4 | 198 | if (!IS_ERR(page)) { |
1da177e4 | 199 | kmap(page); |
1da177e4 LT |
200 | if (!PageChecked(page)) |
201 | afs_dir_check_page(dir, page); | |
202 | if (PageError(page)) | |
203 | goto fail; | |
204 | } | |
205 | return page; | |
206 | ||
ec26815a | 207 | fail: |
1da177e4 | 208 | afs_dir_put_page(page); |
08e0e7c8 | 209 | _leave(" = -EIO"); |
1da177e4 | 210 | return ERR_PTR(-EIO); |
ec26815a | 211 | } |
1da177e4 | 212 | |
1da177e4 LT |
213 | /* |
214 | * open an AFS directory file | |
215 | */ | |
216 | static int afs_dir_open(struct inode *inode, struct file *file) | |
217 | { | |
218 | _enter("{%lu}", inode->i_ino); | |
219 | ||
2ecd05ae AD |
220 | BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); |
221 | BUILD_BUG_ON(sizeof(union afs_dirent) != 32); | |
1da177e4 | 222 | |
08e0e7c8 | 223 | if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags)) |
1da177e4 LT |
224 | return -ENOENT; |
225 | ||
00d3b7a4 | 226 | return afs_open(inode, file); |
ec26815a | 227 | } |
1da177e4 | 228 | |
1da177e4 LT |
229 | /* |
230 | * deal with one block in an AFS directory | |
231 | */ | |
232 | static int afs_dir_iterate_block(unsigned *fpos, | |
233 | union afs_dir_block *block, | |
234 | unsigned blkoff, | |
235 | void *cookie, | |
236 | filldir_t filldir) | |
237 | { | |
238 | union afs_dirent *dire; | |
239 | unsigned offset, next, curr; | |
240 | size_t nlen; | |
241 | int tmp, ret; | |
242 | ||
243 | _enter("%u,%x,%p,,",*fpos,blkoff,block); | |
244 | ||
245 | curr = (*fpos - blkoff) / sizeof(union afs_dirent); | |
246 | ||
247 | /* walk through the block, an entry at a time */ | |
248 | for (offset = AFS_DIRENT_PER_BLOCK - block->pagehdr.nentries; | |
249 | offset < AFS_DIRENT_PER_BLOCK; | |
250 | offset = next | |
251 | ) { | |
252 | next = offset + 1; | |
253 | ||
254 | /* skip entries marked unused in the bitmap */ | |
255 | if (!(block->pagehdr.bitmap[offset / 8] & | |
256 | (1 << (offset % 8)))) { | |
08e0e7c8 | 257 | _debug("ENT[%Zu.%u]: unused", |
1da177e4 LT |
258 | blkoff / sizeof(union afs_dir_block), offset); |
259 | if (offset >= curr) | |
260 | *fpos = blkoff + | |
261 | next * sizeof(union afs_dirent); | |
262 | continue; | |
263 | } | |
264 | ||
265 | /* got a valid entry */ | |
266 | dire = &block->dirents[offset]; | |
267 | nlen = strnlen(dire->u.name, | |
268 | sizeof(*block) - | |
269 | offset * sizeof(union afs_dirent)); | |
270 | ||
08e0e7c8 | 271 | _debug("ENT[%Zu.%u]: %s %Zu \"%s\"", |
1da177e4 LT |
272 | blkoff / sizeof(union afs_dir_block), offset, |
273 | (offset < curr ? "skip" : "fill"), | |
274 | nlen, dire->u.name); | |
275 | ||
276 | /* work out where the next possible entry is */ | |
277 | for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_dirent)) { | |
278 | if (next >= AFS_DIRENT_PER_BLOCK) { | |
279 | _debug("ENT[%Zu.%u]:" | |
280 | " %u travelled beyond end dir block" | |
08e0e7c8 | 281 | " (len %u/%Zu)", |
1da177e4 LT |
282 | blkoff / sizeof(union afs_dir_block), |
283 | offset, next, tmp, nlen); | |
284 | return -EIO; | |
285 | } | |
286 | if (!(block->pagehdr.bitmap[next / 8] & | |
287 | (1 << (next % 8)))) { | |
288 | _debug("ENT[%Zu.%u]:" | |
08e0e7c8 | 289 | " %u unmarked extension (len %u/%Zu)", |
1da177e4 LT |
290 | blkoff / sizeof(union afs_dir_block), |
291 | offset, next, tmp, nlen); | |
292 | return -EIO; | |
293 | } | |
294 | ||
08e0e7c8 | 295 | _debug("ENT[%Zu.%u]: ext %u/%Zu", |
1da177e4 LT |
296 | blkoff / sizeof(union afs_dir_block), |
297 | next, tmp, nlen); | |
298 | next++; | |
299 | } | |
300 | ||
301 | /* skip if starts before the current position */ | |
302 | if (offset < curr) | |
303 | continue; | |
304 | ||
305 | /* found the next entry */ | |
306 | ret = filldir(cookie, | |
307 | dire->u.name, | |
308 | nlen, | |
309 | blkoff + offset * sizeof(union afs_dirent), | |
310 | ntohl(dire->u.vnode), | |
260a9803 | 311 | filldir == afs_lookup_filldir ? |
1da177e4 LT |
312 | ntohl(dire->u.unique) : DT_UNKNOWN); |
313 | if (ret < 0) { | |
314 | _leave(" = 0 [full]"); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | *fpos = blkoff + next * sizeof(union afs_dirent); | |
319 | } | |
320 | ||
321 | _leave(" = 1 [more]"); | |
322 | return 1; | |
ec26815a | 323 | } |
1da177e4 | 324 | |
1da177e4 | 325 | /* |
08e0e7c8 | 326 | * iterate through the data blob that lists the contents of an AFS directory |
1da177e4 LT |
327 | */ |
328 | static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, | |
00d3b7a4 | 329 | filldir_t filldir, struct key *key) |
1da177e4 | 330 | { |
08e0e7c8 | 331 | union afs_dir_block *dblock; |
1da177e4 LT |
332 | struct afs_dir_page *dbuf; |
333 | struct page *page; | |
334 | unsigned blkoff, limit; | |
335 | int ret; | |
336 | ||
337 | _enter("{%lu},%u,,", dir->i_ino, *fpos); | |
338 | ||
08e0e7c8 | 339 | if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { |
1da177e4 LT |
340 | _leave(" = -ESTALE"); |
341 | return -ESTALE; | |
342 | } | |
343 | ||
344 | /* round the file position up to the next entry boundary */ | |
345 | *fpos += sizeof(union afs_dirent) - 1; | |
346 | *fpos &= ~(sizeof(union afs_dirent) - 1); | |
347 | ||
348 | /* walk through the blocks in sequence */ | |
349 | ret = 0; | |
350 | while (*fpos < dir->i_size) { | |
351 | blkoff = *fpos & ~(sizeof(union afs_dir_block) - 1); | |
352 | ||
353 | /* fetch the appropriate page from the directory */ | |
00d3b7a4 | 354 | page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key); |
1da177e4 LT |
355 | if (IS_ERR(page)) { |
356 | ret = PTR_ERR(page); | |
357 | break; | |
358 | } | |
359 | ||
360 | limit = blkoff & ~(PAGE_SIZE - 1); | |
361 | ||
362 | dbuf = page_address(page); | |
363 | ||
364 | /* deal with the individual blocks stashed on this page */ | |
365 | do { | |
366 | dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / | |
367 | sizeof(union afs_dir_block)]; | |
368 | ret = afs_dir_iterate_block(fpos, dblock, blkoff, | |
369 | cookie, filldir); | |
370 | if (ret != 1) { | |
371 | afs_dir_put_page(page); | |
372 | goto out; | |
373 | } | |
374 | ||
375 | blkoff += sizeof(union afs_dir_block); | |
376 | ||
377 | } while (*fpos < dir->i_size && blkoff < limit); | |
378 | ||
379 | afs_dir_put_page(page); | |
380 | ret = 0; | |
381 | } | |
382 | ||
ec26815a | 383 | out: |
1da177e4 LT |
384 | _leave(" = %d", ret); |
385 | return ret; | |
ec26815a | 386 | } |
1da177e4 | 387 | |
1da177e4 LT |
388 | /* |
389 | * read an AFS directory | |
390 | */ | |
260a9803 | 391 | static int afs_readdir(struct file *file, void *cookie, filldir_t filldir) |
1da177e4 LT |
392 | { |
393 | unsigned fpos; | |
394 | int ret; | |
395 | ||
08e0e7c8 DH |
396 | _enter("{%Ld,{%lu}}", |
397 | file->f_pos, file->f_path.dentry->d_inode->i_ino); | |
1da177e4 | 398 | |
00d3b7a4 DH |
399 | ASSERT(file->private_data != NULL); |
400 | ||
1da177e4 | 401 | fpos = file->f_pos; |
08e0e7c8 | 402 | ret = afs_dir_iterate(file->f_path.dentry->d_inode, &fpos, |
00d3b7a4 | 403 | cookie, filldir, file->private_data); |
1da177e4 LT |
404 | file->f_pos = fpos; |
405 | ||
406 | _leave(" = %d", ret); | |
407 | return ret; | |
ec26815a | 408 | } |
1da177e4 | 409 | |
1da177e4 LT |
410 | /* |
411 | * search the directory for a name | |
412 | * - if afs_dir_iterate_block() spots this function, it'll pass the FID | |
413 | * uniquifier through dtype | |
414 | */ | |
260a9803 DH |
415 | static int afs_lookup_filldir(void *_cookie, const char *name, int nlen, |
416 | loff_t fpos, u64 ino, unsigned dtype) | |
1da177e4 | 417 | { |
260a9803 | 418 | struct afs_lookup_cookie *cookie = _cookie; |
1da177e4 | 419 | |
08e0e7c8 | 420 | _enter("{%s,%Zu},%s,%u,,%llu,%u", |
ba3e0e1a DM |
421 | cookie->name, cookie->nlen, name, nlen, |
422 | (unsigned long long) ino, dtype); | |
1da177e4 | 423 | |
08e0e7c8 DH |
424 | /* insanity checks first */ |
425 | BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); | |
426 | BUILD_BUG_ON(sizeof(union afs_dirent) != 32); | |
427 | ||
1da177e4 LT |
428 | if (cookie->nlen != nlen || memcmp(cookie->name, name, nlen) != 0) { |
429 | _leave(" = 0 [no]"); | |
430 | return 0; | |
431 | } | |
432 | ||
433 | cookie->fid.vnode = ino; | |
434 | cookie->fid.unique = dtype; | |
435 | cookie->found = 1; | |
436 | ||
437 | _leave(" = -1 [found]"); | |
438 | return -1; | |
ec26815a | 439 | } |
1da177e4 | 440 | |
1da177e4 | 441 | /* |
08e0e7c8 | 442 | * do a lookup in a directory |
260a9803 | 443 | * - just returns the FID the dentry name maps to if found |
1da177e4 | 444 | */ |
08e0e7c8 | 445 | static int afs_do_lookup(struct inode *dir, struct dentry *dentry, |
00d3b7a4 | 446 | struct afs_fid *fid, struct key *key) |
1da177e4 | 447 | { |
260a9803 | 448 | struct afs_lookup_cookie cookie; |
1da177e4 | 449 | struct afs_super_info *as; |
1da177e4 LT |
450 | unsigned fpos; |
451 | int ret; | |
452 | ||
08e0e7c8 | 453 | _enter("{%lu},%p{%s},", dir->i_ino, dentry, dentry->d_name.name); |
1da177e4 LT |
454 | |
455 | as = dir->i_sb->s_fs_info; | |
456 | ||
457 | /* search the directory */ | |
458 | cookie.name = dentry->d_name.name; | |
459 | cookie.nlen = dentry->d_name.len; | |
460 | cookie.fid.vid = as->volume->vid; | |
461 | cookie.found = 0; | |
462 | ||
463 | fpos = 0; | |
260a9803 | 464 | ret = afs_dir_iterate(dir, &fpos, &cookie, afs_lookup_filldir, |
00d3b7a4 | 465 | key); |
1da177e4 | 466 | if (ret < 0) { |
08e0e7c8 DH |
467 | _leave(" = %d [iter]", ret); |
468 | return ret; | |
1da177e4 LT |
469 | } |
470 | ||
471 | ret = -ENOENT; | |
472 | if (!cookie.found) { | |
08e0e7c8 DH |
473 | _leave(" = -ENOENT [not found]"); |
474 | return -ENOENT; | |
1da177e4 LT |
475 | } |
476 | ||
08e0e7c8 DH |
477 | *fid = cookie.fid; |
478 | _leave(" = 0 { vn=%u u=%u }", fid->vnode, fid->unique); | |
479 | return 0; | |
480 | } | |
481 | ||
482 | /* | |
483 | * look up an entry in a directory | |
484 | */ | |
260a9803 DH |
485 | static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, |
486 | struct nameidata *nd) | |
08e0e7c8 DH |
487 | { |
488 | struct afs_vnode *vnode; | |
489 | struct afs_fid fid; | |
490 | struct inode *inode; | |
00d3b7a4 | 491 | struct key *key; |
08e0e7c8 DH |
492 | int ret; |
493 | ||
260a9803 DH |
494 | vnode = AFS_FS_I(dir); |
495 | ||
416351f2 | 496 | _enter("{%x:%u},%p{%s},", |
260a9803 DH |
497 | vnode->fid.vid, vnode->fid.vnode, dentry, dentry->d_name.name); |
498 | ||
499 | ASSERTCMP(dentry->d_inode, ==, NULL); | |
08e0e7c8 | 500 | |
45222b9e | 501 | if (dentry->d_name.len >= AFSNAMEMAX) { |
08e0e7c8 DH |
502 | _leave(" = -ENAMETOOLONG"); |
503 | return ERR_PTR(-ENAMETOOLONG); | |
504 | } | |
505 | ||
08e0e7c8 DH |
506 | if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { |
507 | _leave(" = -ESTALE"); | |
508 | return ERR_PTR(-ESTALE); | |
509 | } | |
510 | ||
00d3b7a4 DH |
511 | key = afs_request_key(vnode->volume->cell); |
512 | if (IS_ERR(key)) { | |
513 | _leave(" = %ld [key]", PTR_ERR(key)); | |
514 | return ERR_PTR(PTR_ERR(key)); | |
515 | } | |
516 | ||
260a9803 DH |
517 | ret = afs_validate(vnode, key); |
518 | if (ret < 0) { | |
519 | key_put(key); | |
520 | _leave(" = %d [val]", ret); | |
521 | return ERR_PTR(ret); | |
522 | } | |
523 | ||
00d3b7a4 | 524 | ret = afs_do_lookup(dir, dentry, &fid, key); |
1da177e4 | 525 | if (ret < 0) { |
00d3b7a4 | 526 | key_put(key); |
260a9803 DH |
527 | if (ret == -ENOENT) { |
528 | d_add(dentry, NULL); | |
529 | _leave(" = NULL [negative]"); | |
530 | return NULL; | |
531 | } | |
08e0e7c8 | 532 | _leave(" = %d [do]", ret); |
1da177e4 LT |
533 | return ERR_PTR(ret); |
534 | } | |
260a9803 | 535 | dentry->d_fsdata = (void *)(unsigned long) vnode->status.data_version; |
1da177e4 | 536 | |
08e0e7c8 | 537 | /* instantiate the dentry */ |
260a9803 | 538 | inode = afs_iget(dir->i_sb, key, &fid, NULL, NULL); |
00d3b7a4 | 539 | key_put(key); |
08e0e7c8 DH |
540 | if (IS_ERR(inode)) { |
541 | _leave(" = %ld", PTR_ERR(inode)); | |
542 | return ERR_PTR(PTR_ERR(inode)); | |
543 | } | |
544 | ||
1da177e4 | 545 | dentry->d_op = &afs_fs_dentry_operations; |
1da177e4 LT |
546 | |
547 | d_add(dentry, inode); | |
548 | _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%lu }", | |
08e0e7c8 DH |
549 | fid.vnode, |
550 | fid.unique, | |
1da177e4 LT |
551 | dentry->d_inode->i_ino, |
552 | dentry->d_inode->i_version); | |
553 | ||
554 | return NULL; | |
ec26815a | 555 | } |
1da177e4 | 556 | |
1da177e4 LT |
557 | /* |
558 | * check that a dentry lookup hit has found a valid entry | |
559 | * - NOTE! the hit can be a negative hit too, so we can't assume we have an | |
560 | * inode | |
1da177e4 LT |
561 | */ |
562 | static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd) | |
563 | { | |
260a9803 | 564 | struct afs_vnode *vnode, *dir; |
08e0e7c8 | 565 | struct afs_fid fid; |
1da177e4 | 566 | struct dentry *parent; |
00d3b7a4 | 567 | struct key *key; |
260a9803 | 568 | void *dir_version; |
1da177e4 LT |
569 | int ret; |
570 | ||
08e0e7c8 DH |
571 | vnode = AFS_FS_I(dentry->d_inode); |
572 | ||
260a9803 DH |
573 | if (dentry->d_inode) |
574 | _enter("{v={%x:%u} n=%s fl=%lx},", | |
575 | vnode->fid.vid, vnode->fid.vnode, dentry->d_name.name, | |
576 | vnode->flags); | |
577 | else | |
578 | _enter("{neg n=%s}", dentry->d_name.name); | |
1da177e4 | 579 | |
260a9803 | 580 | key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); |
00d3b7a4 DH |
581 | if (IS_ERR(key)) |
582 | key = NULL; | |
583 | ||
1da177e4 | 584 | /* lock down the parent dentry so we can peer at it */ |
08e0e7c8 | 585 | parent = dget_parent(dentry); |
260a9803 | 586 | if (!parent->d_inode) |
1da177e4 LT |
587 | goto out_bad; |
588 | ||
260a9803 | 589 | dir = AFS_FS_I(parent->d_inode); |
1da177e4 | 590 | |
260a9803 DH |
591 | /* validate the parent directory */ |
592 | if (test_bit(AFS_VNODE_MODIFIED, &dir->flags)) | |
593 | afs_validate(dir, key); | |
594 | ||
595 | if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { | |
1da177e4 LT |
596 | _debug("%s: parent dir deleted", dentry->d_name.name); |
597 | goto out_bad; | |
598 | } | |
599 | ||
260a9803 DH |
600 | dir_version = (void *) (unsigned long) dir->status.data_version; |
601 | if (dentry->d_fsdata == dir_version) | |
602 | goto out_valid; /* the dir contents are unchanged */ | |
1da177e4 | 603 | |
260a9803 DH |
604 | _debug("dir modified"); |
605 | ||
606 | /* search the directory for this vnode */ | |
607 | ret = afs_do_lookup(&dir->vfs_inode, dentry, &fid, key); | |
608 | switch (ret) { | |
609 | case 0: | |
610 | /* the filename maps to something */ | |
611 | if (!dentry->d_inode) | |
612 | goto out_bad; | |
613 | if (is_bad_inode(dentry->d_inode)) { | |
614 | printk("kAFS: afs_d_revalidate: %s/%s has bad inode\n", | |
615 | parent->d_name.name, dentry->d_name.name); | |
1da177e4 LT |
616 | goto out_bad; |
617 | } | |
618 | ||
1da177e4 LT |
619 | /* if the vnode ID has changed, then the dirent points to a |
620 | * different file */ | |
08e0e7c8 DH |
621 | if (fid.vnode != vnode->fid.vnode) { |
622 | _debug("%s: dirent changed [%u != %u]", | |
623 | dentry->d_name.name, fid.vnode, | |
624 | vnode->fid.vnode); | |
1da177e4 LT |
625 | goto not_found; |
626 | } | |
627 | ||
628 | /* if the vnode ID uniqifier has changed, then the file has | |
260a9803 DH |
629 | * been deleted and replaced, and the original vnode ID has |
630 | * been reused */ | |
08e0e7c8 | 631 | if (fid.unique != vnode->fid.unique) { |
1da177e4 | 632 | _debug("%s: file deleted (uq %u -> %u I:%lu)", |
08e0e7c8 | 633 | dentry->d_name.name, fid.unique, |
260a9803 | 634 | vnode->fid.unique, dentry->d_inode->i_version); |
08e0e7c8 DH |
635 | spin_lock(&vnode->lock); |
636 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
637 | spin_unlock(&vnode->lock); | |
260a9803 | 638 | goto not_found; |
1da177e4 | 639 | } |
260a9803 | 640 | goto out_valid; |
08e0e7c8 | 641 | |
260a9803 DH |
642 | case -ENOENT: |
643 | /* the filename is unknown */ | |
644 | _debug("%s: dirent not found", dentry->d_name.name); | |
645 | if (dentry->d_inode) | |
646 | goto not_found; | |
647 | goto out_valid; | |
1da177e4 | 648 | |
260a9803 DH |
649 | default: |
650 | _debug("failed to iterate dir %s: %d", | |
651 | parent->d_name.name, ret); | |
08e0e7c8 DH |
652 | goto out_bad; |
653 | } | |
654 | ||
ec26815a | 655 | out_valid: |
260a9803 DH |
656 | dentry->d_fsdata = dir_version; |
657 | out_skip: | |
1da177e4 | 658 | dput(parent); |
00d3b7a4 | 659 | key_put(key); |
1da177e4 LT |
660 | _leave(" = 1 [valid]"); |
661 | return 1; | |
662 | ||
663 | /* the dirent, if it exists, now points to a different vnode */ | |
ec26815a | 664 | not_found: |
1da177e4 LT |
665 | spin_lock(&dentry->d_lock); |
666 | dentry->d_flags |= DCACHE_NFSFS_RENAMED; | |
667 | spin_unlock(&dentry->d_lock); | |
668 | ||
ec26815a | 669 | out_bad: |
260a9803 | 670 | if (dentry->d_inode) { |
1da177e4 LT |
671 | /* don't unhash if we have submounts */ |
672 | if (have_submounts(dentry)) | |
260a9803 | 673 | goto out_skip; |
1da177e4 LT |
674 | } |
675 | ||
1da177e4 | 676 | _debug("dropping dentry %s/%s", |
08e0e7c8 DH |
677 | parent->d_name.name, dentry->d_name.name); |
678 | shrink_dcache_parent(dentry); | |
1da177e4 | 679 | d_drop(dentry); |
1da177e4 | 680 | dput(parent); |
00d3b7a4 | 681 | key_put(key); |
1da177e4 LT |
682 | |
683 | _leave(" = 0 [bad]"); | |
684 | return 0; | |
ec26815a | 685 | } |
1da177e4 | 686 | |
1da177e4 LT |
687 | /* |
688 | * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't | |
689 | * sleep) | |
690 | * - called from dput() when d_count is going to 0. | |
691 | * - return 1 to request dentry be unhashed, 0 otherwise | |
692 | */ | |
693 | static int afs_d_delete(struct dentry *dentry) | |
694 | { | |
695 | _enter("%s", dentry->d_name.name); | |
696 | ||
697 | if (dentry->d_flags & DCACHE_NFSFS_RENAMED) | |
698 | goto zap; | |
699 | ||
08e0e7c8 DH |
700 | if (dentry->d_inode && |
701 | test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dentry->d_inode)->flags)) | |
1da177e4 | 702 | goto zap; |
1da177e4 LT |
703 | |
704 | _leave(" = 0 [keep]"); | |
705 | return 0; | |
706 | ||
ec26815a | 707 | zap: |
1da177e4 LT |
708 | _leave(" = 1 [zap]"); |
709 | return 1; | |
ec26815a | 710 | } |
260a9803 DH |
711 | |
712 | /* | |
713 | * handle dentry release | |
714 | */ | |
715 | static void afs_d_release(struct dentry *dentry) | |
716 | { | |
717 | _enter("%s", dentry->d_name.name); | |
718 | } | |
719 | ||
720 | /* | |
721 | * create a directory on an AFS filesystem | |
722 | */ | |
723 | static int afs_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
724 | { | |
725 | struct afs_file_status status; | |
726 | struct afs_callback cb; | |
727 | struct afs_server *server; | |
728 | struct afs_vnode *dvnode, *vnode; | |
729 | struct afs_fid fid; | |
730 | struct inode *inode; | |
731 | struct key *key; | |
732 | int ret; | |
733 | ||
734 | dvnode = AFS_FS_I(dir); | |
735 | ||
416351f2 | 736 | _enter("{%x:%u},{%s},%o", |
260a9803 DH |
737 | dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode); |
738 | ||
739 | ret = -ENAMETOOLONG; | |
45222b9e | 740 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
741 | goto error; |
742 | ||
743 | key = afs_request_key(dvnode->volume->cell); | |
744 | if (IS_ERR(key)) { | |
745 | ret = PTR_ERR(key); | |
746 | goto error; | |
747 | } | |
748 | ||
749 | mode |= S_IFDIR; | |
750 | ret = afs_vnode_create(dvnode, key, dentry->d_name.name, | |
751 | mode, &fid, &status, &cb, &server); | |
752 | if (ret < 0) | |
753 | goto mkdir_error; | |
754 | ||
755 | inode = afs_iget(dir->i_sb, key, &fid, &status, &cb); | |
756 | if (IS_ERR(inode)) { | |
757 | /* ENOMEM at a really inconvenient time - just abandon the new | |
758 | * directory on the server */ | |
759 | ret = PTR_ERR(inode); | |
760 | goto iget_error; | |
761 | } | |
762 | ||
763 | /* apply the status report we've got for the new vnode */ | |
764 | vnode = AFS_FS_I(inode); | |
765 | spin_lock(&vnode->lock); | |
766 | vnode->update_cnt++; | |
767 | spin_unlock(&vnode->lock); | |
768 | afs_vnode_finalise_status_update(vnode, server); | |
769 | afs_put_server(server); | |
770 | ||
771 | d_instantiate(dentry, inode); | |
772 | if (d_unhashed(dentry)) { | |
773 | _debug("not hashed"); | |
774 | d_rehash(dentry); | |
775 | } | |
776 | key_put(key); | |
777 | _leave(" = 0"); | |
778 | return 0; | |
779 | ||
780 | iget_error: | |
781 | afs_put_server(server); | |
782 | mkdir_error: | |
783 | key_put(key); | |
784 | error: | |
785 | d_drop(dentry); | |
786 | _leave(" = %d", ret); | |
787 | return ret; | |
788 | } | |
789 | ||
790 | /* | |
791 | * remove a directory from an AFS filesystem | |
792 | */ | |
793 | static int afs_rmdir(struct inode *dir, struct dentry *dentry) | |
794 | { | |
795 | struct afs_vnode *dvnode, *vnode; | |
796 | struct key *key; | |
797 | int ret; | |
798 | ||
799 | dvnode = AFS_FS_I(dir); | |
800 | ||
416351f2 | 801 | _enter("{%x:%u},{%s}", |
260a9803 DH |
802 | dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name); |
803 | ||
804 | ret = -ENAMETOOLONG; | |
45222b9e | 805 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
806 | goto error; |
807 | ||
808 | key = afs_request_key(dvnode->volume->cell); | |
809 | if (IS_ERR(key)) { | |
810 | ret = PTR_ERR(key); | |
811 | goto error; | |
812 | } | |
813 | ||
814 | ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, true); | |
815 | if (ret < 0) | |
816 | goto rmdir_error; | |
817 | ||
818 | if (dentry->d_inode) { | |
819 | vnode = AFS_FS_I(dentry->d_inode); | |
820 | clear_nlink(&vnode->vfs_inode); | |
821 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
822 | afs_discard_callback_on_delete(vnode); | |
823 | } | |
824 | ||
825 | key_put(key); | |
826 | _leave(" = 0"); | |
827 | return 0; | |
828 | ||
829 | rmdir_error: | |
830 | key_put(key); | |
831 | error: | |
832 | _leave(" = %d", ret); | |
833 | return ret; | |
834 | } | |
835 | ||
836 | /* | |
837 | * remove a file from an AFS filesystem | |
838 | */ | |
839 | static int afs_unlink(struct inode *dir, struct dentry *dentry) | |
840 | { | |
841 | struct afs_vnode *dvnode, *vnode; | |
842 | struct key *key; | |
843 | int ret; | |
844 | ||
845 | dvnode = AFS_FS_I(dir); | |
846 | ||
416351f2 | 847 | _enter("{%x:%u},{%s}", |
260a9803 DH |
848 | dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name); |
849 | ||
850 | ret = -ENAMETOOLONG; | |
45222b9e | 851 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
852 | goto error; |
853 | ||
854 | key = afs_request_key(dvnode->volume->cell); | |
855 | if (IS_ERR(key)) { | |
856 | ret = PTR_ERR(key); | |
857 | goto error; | |
858 | } | |
859 | ||
860 | if (dentry->d_inode) { | |
861 | vnode = AFS_FS_I(dentry->d_inode); | |
862 | ||
863 | /* make sure we have a callback promise on the victim */ | |
864 | ret = afs_validate(vnode, key); | |
865 | if (ret < 0) | |
866 | goto error; | |
867 | } | |
868 | ||
869 | ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, false); | |
870 | if (ret < 0) | |
871 | goto remove_error; | |
872 | ||
873 | if (dentry->d_inode) { | |
874 | /* if the file wasn't deleted due to excess hard links, the | |
875 | * fileserver will break the callback promise on the file - if | |
876 | * it had one - before it returns to us, and if it was deleted, | |
877 | * it won't | |
878 | * | |
879 | * however, if we didn't have a callback promise outstanding, | |
880 | * or it was outstanding on a different server, then it won't | |
881 | * break it either... | |
882 | */ | |
883 | vnode = AFS_FS_I(dentry->d_inode); | |
884 | if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) | |
885 | _debug("AFS_VNODE_DELETED"); | |
886 | if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) | |
887 | _debug("AFS_VNODE_CB_BROKEN"); | |
888 | set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags); | |
889 | ret = afs_validate(vnode, key); | |
890 | _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); | |
891 | } | |
892 | ||
893 | key_put(key); | |
894 | _leave(" = 0"); | |
895 | return 0; | |
896 | ||
897 | remove_error: | |
898 | key_put(key); | |
899 | error: | |
900 | _leave(" = %d", ret); | |
901 | return ret; | |
902 | } | |
903 | ||
904 | /* | |
905 | * create a regular file on an AFS filesystem | |
906 | */ | |
907 | static int afs_create(struct inode *dir, struct dentry *dentry, int mode, | |
908 | struct nameidata *nd) | |
909 | { | |
910 | struct afs_file_status status; | |
911 | struct afs_callback cb; | |
912 | struct afs_server *server; | |
913 | struct afs_vnode *dvnode, *vnode; | |
914 | struct afs_fid fid; | |
915 | struct inode *inode; | |
916 | struct key *key; | |
917 | int ret; | |
918 | ||
919 | dvnode = AFS_FS_I(dir); | |
920 | ||
416351f2 | 921 | _enter("{%x:%u},{%s},%o,", |
260a9803 DH |
922 | dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode); |
923 | ||
924 | ret = -ENAMETOOLONG; | |
45222b9e | 925 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
926 | goto error; |
927 | ||
928 | key = afs_request_key(dvnode->volume->cell); | |
929 | if (IS_ERR(key)) { | |
930 | ret = PTR_ERR(key); | |
931 | goto error; | |
932 | } | |
933 | ||
934 | mode |= S_IFREG; | |
935 | ret = afs_vnode_create(dvnode, key, dentry->d_name.name, | |
936 | mode, &fid, &status, &cb, &server); | |
937 | if (ret < 0) | |
938 | goto create_error; | |
939 | ||
940 | inode = afs_iget(dir->i_sb, key, &fid, &status, &cb); | |
941 | if (IS_ERR(inode)) { | |
942 | /* ENOMEM at a really inconvenient time - just abandon the new | |
943 | * directory on the server */ | |
944 | ret = PTR_ERR(inode); | |
945 | goto iget_error; | |
946 | } | |
947 | ||
948 | /* apply the status report we've got for the new vnode */ | |
949 | vnode = AFS_FS_I(inode); | |
950 | spin_lock(&vnode->lock); | |
951 | vnode->update_cnt++; | |
952 | spin_unlock(&vnode->lock); | |
953 | afs_vnode_finalise_status_update(vnode, server); | |
954 | afs_put_server(server); | |
955 | ||
956 | d_instantiate(dentry, inode); | |
957 | if (d_unhashed(dentry)) { | |
958 | _debug("not hashed"); | |
959 | d_rehash(dentry); | |
960 | } | |
961 | key_put(key); | |
962 | _leave(" = 0"); | |
963 | return 0; | |
964 | ||
965 | iget_error: | |
966 | afs_put_server(server); | |
967 | create_error: | |
968 | key_put(key); | |
969 | error: | |
970 | d_drop(dentry); | |
971 | _leave(" = %d", ret); | |
972 | return ret; | |
973 | } | |
974 | ||
975 | /* | |
976 | * create a hard link between files in an AFS filesystem | |
977 | */ | |
978 | static int afs_link(struct dentry *from, struct inode *dir, | |
979 | struct dentry *dentry) | |
980 | { | |
981 | struct afs_vnode *dvnode, *vnode; | |
982 | struct key *key; | |
983 | int ret; | |
984 | ||
985 | vnode = AFS_FS_I(from->d_inode); | |
986 | dvnode = AFS_FS_I(dir); | |
987 | ||
416351f2 | 988 | _enter("{%x:%u},{%x:%u},{%s}", |
260a9803 DH |
989 | vnode->fid.vid, vnode->fid.vnode, |
990 | dvnode->fid.vid, dvnode->fid.vnode, | |
991 | dentry->d_name.name); | |
992 | ||
993 | ret = -ENAMETOOLONG; | |
45222b9e | 994 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
995 | goto error; |
996 | ||
997 | key = afs_request_key(dvnode->volume->cell); | |
998 | if (IS_ERR(key)) { | |
999 | ret = PTR_ERR(key); | |
1000 | goto error; | |
1001 | } | |
1002 | ||
1003 | ret = afs_vnode_link(dvnode, vnode, key, dentry->d_name.name); | |
1004 | if (ret < 0) | |
1005 | goto link_error; | |
1006 | ||
1007 | atomic_inc(&vnode->vfs_inode.i_count); | |
1008 | d_instantiate(dentry, &vnode->vfs_inode); | |
1009 | key_put(key); | |
1010 | _leave(" = 0"); | |
1011 | return 0; | |
1012 | ||
1013 | link_error: | |
1014 | key_put(key); | |
1015 | error: | |
1016 | d_drop(dentry); | |
1017 | _leave(" = %d", ret); | |
1018 | return ret; | |
1019 | } | |
1020 | ||
1021 | /* | |
1022 | * create a symlink in an AFS filesystem | |
1023 | */ | |
1024 | static int afs_symlink(struct inode *dir, struct dentry *dentry, | |
1025 | const char *content) | |
1026 | { | |
1027 | struct afs_file_status status; | |
1028 | struct afs_server *server; | |
1029 | struct afs_vnode *dvnode, *vnode; | |
1030 | struct afs_fid fid; | |
1031 | struct inode *inode; | |
1032 | struct key *key; | |
1033 | int ret; | |
1034 | ||
1035 | dvnode = AFS_FS_I(dir); | |
1036 | ||
416351f2 | 1037 | _enter("{%x:%u},{%s},%s", |
260a9803 DH |
1038 | dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, |
1039 | content); | |
1040 | ||
1041 | ret = -ENAMETOOLONG; | |
45222b9e | 1042 | if (dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
1043 | goto error; |
1044 | ||
1045 | ret = -EINVAL; | |
45222b9e | 1046 | if (strlen(content) >= AFSPATHMAX) |
260a9803 DH |
1047 | goto error; |
1048 | ||
1049 | key = afs_request_key(dvnode->volume->cell); | |
1050 | if (IS_ERR(key)) { | |
1051 | ret = PTR_ERR(key); | |
1052 | goto error; | |
1053 | } | |
1054 | ||
1055 | ret = afs_vnode_symlink(dvnode, key, dentry->d_name.name, content, | |
1056 | &fid, &status, &server); | |
1057 | if (ret < 0) | |
1058 | goto create_error; | |
1059 | ||
1060 | inode = afs_iget(dir->i_sb, key, &fid, &status, NULL); | |
1061 | if (IS_ERR(inode)) { | |
1062 | /* ENOMEM at a really inconvenient time - just abandon the new | |
1063 | * directory on the server */ | |
1064 | ret = PTR_ERR(inode); | |
1065 | goto iget_error; | |
1066 | } | |
1067 | ||
1068 | /* apply the status report we've got for the new vnode */ | |
1069 | vnode = AFS_FS_I(inode); | |
1070 | spin_lock(&vnode->lock); | |
1071 | vnode->update_cnt++; | |
1072 | spin_unlock(&vnode->lock); | |
1073 | afs_vnode_finalise_status_update(vnode, server); | |
1074 | afs_put_server(server); | |
1075 | ||
1076 | d_instantiate(dentry, inode); | |
1077 | if (d_unhashed(dentry)) { | |
1078 | _debug("not hashed"); | |
1079 | d_rehash(dentry); | |
1080 | } | |
1081 | key_put(key); | |
1082 | _leave(" = 0"); | |
1083 | return 0; | |
1084 | ||
1085 | iget_error: | |
1086 | afs_put_server(server); | |
1087 | create_error: | |
1088 | key_put(key); | |
1089 | error: | |
1090 | d_drop(dentry); | |
1091 | _leave(" = %d", ret); | |
1092 | return ret; | |
1093 | } | |
1094 | ||
1095 | /* | |
1096 | * rename a file in an AFS filesystem and/or move it between directories | |
1097 | */ | |
1098 | static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1099 | struct inode *new_dir, struct dentry *new_dentry) | |
1100 | { | |
1101 | struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; | |
1102 | struct key *key; | |
1103 | int ret; | |
1104 | ||
1105 | vnode = AFS_FS_I(old_dentry->d_inode); | |
1106 | orig_dvnode = AFS_FS_I(old_dir); | |
1107 | new_dvnode = AFS_FS_I(new_dir); | |
1108 | ||
416351f2 | 1109 | _enter("{%x:%u},{%x:%u},{%x:%u},{%s}", |
260a9803 DH |
1110 | orig_dvnode->fid.vid, orig_dvnode->fid.vnode, |
1111 | vnode->fid.vid, vnode->fid.vnode, | |
1112 | new_dvnode->fid.vid, new_dvnode->fid.vnode, | |
1113 | new_dentry->d_name.name); | |
1114 | ||
1115 | ret = -ENAMETOOLONG; | |
45222b9e | 1116 | if (new_dentry->d_name.len >= AFSNAMEMAX) |
260a9803 DH |
1117 | goto error; |
1118 | ||
1119 | key = afs_request_key(orig_dvnode->volume->cell); | |
1120 | if (IS_ERR(key)) { | |
1121 | ret = PTR_ERR(key); | |
1122 | goto error; | |
1123 | } | |
1124 | ||
1125 | ret = afs_vnode_rename(orig_dvnode, new_dvnode, key, | |
1126 | old_dentry->d_name.name, | |
1127 | new_dentry->d_name.name); | |
1128 | if (ret < 0) | |
1129 | goto rename_error; | |
1130 | key_put(key); | |
1131 | _leave(" = 0"); | |
1132 | return 0; | |
1133 | ||
1134 | rename_error: | |
1135 | key_put(key); | |
1136 | error: | |
1137 | d_drop(new_dentry); | |
1138 | _leave(" = %d", ret); | |
1139 | return ret; | |
1140 | } |