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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 | 15 | #include <linux/fs.h> |
34286d66 | 16 | #include <linux/namei.h> |
1da177e4 | 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 | 22 | static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 23 | unsigned int flags); |
1da177e4 | 24 | static int afs_dir_open(struct inode *inode, struct file *file); |
1bbae9f8 | 25 | static int afs_readdir(struct file *file, struct dir_context *ctx); |
0b728e19 | 26 | static int afs_d_revalidate(struct dentry *dentry, unsigned int flags); |
fe15ce44 | 27 | static int afs_d_delete(const struct dentry *dentry); |
260a9803 | 28 | static void afs_d_release(struct dentry *dentry); |
ac7576f4 | 29 | static int afs_lookup_filldir(struct dir_context *ctx, const char *name, int nlen, |
afefdbb2 | 30 | loff_t fpos, u64 ino, unsigned dtype); |
4acdaf27 | 31 | static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 32 | bool excl); |
18bb1db3 | 33 | static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); |
260a9803 DH |
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, | |
1cd66c93 MS |
41 | struct inode *new_dir, struct dentry *new_dentry, |
42 | unsigned int flags); | |
1da177e4 | 43 | |
4b6f5d20 | 44 | const struct file_operations afs_dir_file_operations = { |
1da177e4 | 45 | .open = afs_dir_open, |
00d3b7a4 | 46 | .release = afs_release, |
29884eff | 47 | .iterate_shared = afs_readdir, |
e8d6c554 | 48 | .lock = afs_lock, |
3222a3e5 | 49 | .llseek = generic_file_llseek, |
1da177e4 LT |
50 | }; |
51 | ||
754661f1 | 52 | const struct inode_operations afs_dir_inode_operations = { |
260a9803 DH |
53 | .create = afs_create, |
54 | .lookup = afs_lookup, | |
55 | .link = afs_link, | |
56 | .unlink = afs_unlink, | |
57 | .symlink = afs_symlink, | |
58 | .mkdir = afs_mkdir, | |
59 | .rmdir = afs_rmdir, | |
2773bf00 | 60 | .rename = afs_rename, |
00d3b7a4 | 61 | .permission = afs_permission, |
416351f2 | 62 | .getattr = afs_getattr, |
31143d5d | 63 | .setattr = afs_setattr, |
1da177e4 LT |
64 | }; |
65 | ||
d61dcce2 | 66 | const struct dentry_operations afs_fs_dentry_operations = { |
1da177e4 LT |
67 | .d_revalidate = afs_d_revalidate, |
68 | .d_delete = afs_d_delete, | |
260a9803 | 69 | .d_release = afs_d_release, |
d18610b0 | 70 | .d_automount = afs_d_automount, |
1da177e4 LT |
71 | }; |
72 | ||
73 | #define AFS_DIR_HASHTBL_SIZE 128 | |
74 | #define AFS_DIR_DIRENT_SIZE 32 | |
75 | #define AFS_DIRENT_PER_BLOCK 64 | |
76 | ||
77 | union afs_dirent { | |
78 | struct { | |
79 | uint8_t valid; | |
80 | uint8_t unused[1]; | |
81 | __be16 hash_next; | |
82 | __be32 vnode; | |
83 | __be32 unique; | |
84 | uint8_t name[16]; | |
85 | uint8_t overflow[4]; /* if any char of the name (inc | |
86 | * NUL) reaches here, consume | |
87 | * the next dirent too */ | |
88 | } u; | |
89 | uint8_t extended_name[32]; | |
90 | }; | |
91 | ||
92 | /* AFS directory page header (one at the beginning of every 2048-byte chunk) */ | |
93 | struct afs_dir_pagehdr { | |
94 | __be16 npages; | |
95 | __be16 magic; | |
96 | #define AFS_DIR_MAGIC htons(1234) | |
97 | uint8_t nentries; | |
98 | uint8_t bitmap[8]; | |
99 | uint8_t pad[19]; | |
100 | }; | |
101 | ||
102 | /* directory block layout */ | |
103 | union afs_dir_block { | |
104 | ||
105 | struct afs_dir_pagehdr pagehdr; | |
106 | ||
107 | struct { | |
108 | struct afs_dir_pagehdr pagehdr; | |
109 | uint8_t alloc_ctrs[128]; | |
110 | /* dir hash table */ | |
111 | uint16_t hashtable[AFS_DIR_HASHTBL_SIZE]; | |
112 | } hdr; | |
113 | ||
114 | union afs_dirent dirents[AFS_DIRENT_PER_BLOCK]; | |
115 | }; | |
116 | ||
117 | /* layout on a linux VM page */ | |
118 | struct afs_dir_page { | |
119 | union afs_dir_block blocks[PAGE_SIZE / sizeof(union afs_dir_block)]; | |
120 | }; | |
121 | ||
260a9803 | 122 | struct afs_lookup_cookie { |
1bbae9f8 | 123 | struct dir_context ctx; |
1da177e4 | 124 | struct afs_fid fid; |
1bbae9f8 | 125 | struct qstr name; |
1da177e4 LT |
126 | int found; |
127 | }; | |
128 | ||
1da177e4 LT |
129 | /* |
130 | * check that a directory page is valid | |
131 | */ | |
be5b82db | 132 | static inline bool afs_dir_check_page(struct inode *dir, struct page *page) |
1da177e4 LT |
133 | { |
134 | struct afs_dir_page *dbuf; | |
135 | loff_t latter; | |
136 | int tmp, qty; | |
137 | ||
138 | #if 0 | |
139 | /* check the page count */ | |
140 | qty = desc.size / sizeof(dbuf->blocks[0]); | |
141 | if (qty == 0) | |
142 | goto error; | |
143 | ||
08e0e7c8 | 144 | if (page->index == 0 && qty != ntohs(dbuf->blocks[0].pagehdr.npages)) { |
1da177e4 | 145 | printk("kAFS: %s(%lu): wrong number of dir blocks %d!=%hu\n", |
530b6412 | 146 | __func__, dir->i_ino, qty, |
08e0e7c8 | 147 | ntohs(dbuf->blocks[0].pagehdr.npages)); |
1da177e4 LT |
148 | goto error; |
149 | } | |
150 | #endif | |
151 | ||
152 | /* determine how many magic numbers there should be in this page */ | |
54b21a79 | 153 | latter = dir->i_size - page_offset(page); |
1da177e4 LT |
154 | if (latter >= PAGE_SIZE) |
155 | qty = PAGE_SIZE; | |
156 | else | |
157 | qty = latter; | |
158 | qty /= sizeof(union afs_dir_block); | |
159 | ||
160 | /* check them */ | |
161 | dbuf = page_address(page); | |
162 | for (tmp = 0; tmp < qty; tmp++) { | |
163 | if (dbuf->blocks[tmp].pagehdr.magic != AFS_DIR_MAGIC) { | |
164 | printk("kAFS: %s(%lu): bad magic %d/%d is %04hx\n", | |
530b6412 | 165 | __func__, dir->i_ino, tmp, qty, |
1da177e4 LT |
166 | ntohs(dbuf->blocks[tmp].pagehdr.magic)); |
167 | goto error; | |
168 | } | |
169 | } | |
170 | ||
171 | SetPageChecked(page); | |
be5b82db | 172 | return true; |
1da177e4 | 173 | |
ec26815a | 174 | error: |
1da177e4 | 175 | SetPageError(page); |
be5b82db | 176 | return false; |
ec26815a | 177 | } |
1da177e4 | 178 | |
1da177e4 LT |
179 | /* |
180 | * discard a page cached in the pagecache | |
181 | */ | |
182 | static inline void afs_dir_put_page(struct page *page) | |
183 | { | |
184 | kunmap(page); | |
09cbfeaf | 185 | put_page(page); |
ec26815a | 186 | } |
1da177e4 | 187 | |
1da177e4 LT |
188 | /* |
189 | * get a page into the pagecache | |
190 | */ | |
00d3b7a4 DH |
191 | static struct page *afs_dir_get_page(struct inode *dir, unsigned long index, |
192 | struct key *key) | |
1da177e4 LT |
193 | { |
194 | struct page *page; | |
1da177e4 LT |
195 | _enter("{%lu},%lu", dir->i_ino, index); |
196 | ||
f6d335c0 | 197 | page = read_cache_page(dir->i_mapping, index, afs_page_filler, key); |
1da177e4 | 198 | if (!IS_ERR(page)) { |
1da177e4 | 199 | kmap(page); |
be5b82db AV |
200 | if (unlikely(!PageChecked(page))) { |
201 | if (PageError(page) || !afs_dir_check_page(dir, page)) | |
202 | goto fail; | |
203 | } | |
1da177e4 LT |
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 | */ | |
1bbae9f8 | 232 | static int afs_dir_iterate_block(struct dir_context *ctx, |
1da177e4 | 233 | union afs_dir_block *block, |
1bbae9f8 | 234 | unsigned blkoff) |
1da177e4 LT |
235 | { |
236 | union afs_dirent *dire; | |
237 | unsigned offset, next, curr; | |
238 | size_t nlen; | |
1bbae9f8 | 239 | int tmp; |
1da177e4 | 240 | |
1bbae9f8 | 241 | _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block); |
1da177e4 | 242 | |
1bbae9f8 | 243 | curr = (ctx->pos - blkoff) / sizeof(union afs_dirent); |
1da177e4 LT |
244 | |
245 | /* walk through the block, an entry at a time */ | |
246 | for (offset = AFS_DIRENT_PER_BLOCK - block->pagehdr.nentries; | |
247 | offset < AFS_DIRENT_PER_BLOCK; | |
248 | offset = next | |
249 | ) { | |
250 | next = offset + 1; | |
251 | ||
252 | /* skip entries marked unused in the bitmap */ | |
253 | if (!(block->pagehdr.bitmap[offset / 8] & | |
254 | (1 << (offset % 8)))) { | |
5b5e0928 | 255 | _debug("ENT[%zu.%u]: unused", |
1da177e4 LT |
256 | blkoff / sizeof(union afs_dir_block), offset); |
257 | if (offset >= curr) | |
1bbae9f8 | 258 | ctx->pos = blkoff + |
1da177e4 LT |
259 | next * sizeof(union afs_dirent); |
260 | continue; | |
261 | } | |
262 | ||
263 | /* got a valid entry */ | |
264 | dire = &block->dirents[offset]; | |
265 | nlen = strnlen(dire->u.name, | |
266 | sizeof(*block) - | |
267 | offset * sizeof(union afs_dirent)); | |
268 | ||
5b5e0928 | 269 | _debug("ENT[%zu.%u]: %s %zu \"%s\"", |
1da177e4 LT |
270 | blkoff / sizeof(union afs_dir_block), offset, |
271 | (offset < curr ? "skip" : "fill"), | |
272 | nlen, dire->u.name); | |
273 | ||
274 | /* work out where the next possible entry is */ | |
275 | for (tmp = nlen; tmp > 15; tmp -= sizeof(union afs_dirent)) { | |
276 | if (next >= AFS_DIRENT_PER_BLOCK) { | |
5b5e0928 | 277 | _debug("ENT[%zu.%u]:" |
1da177e4 | 278 | " %u travelled beyond end dir block" |
5b5e0928 | 279 | " (len %u/%zu)", |
1da177e4 LT |
280 | blkoff / sizeof(union afs_dir_block), |
281 | offset, next, tmp, nlen); | |
282 | return -EIO; | |
283 | } | |
284 | if (!(block->pagehdr.bitmap[next / 8] & | |
285 | (1 << (next % 8)))) { | |
5b5e0928 AD |
286 | _debug("ENT[%zu.%u]:" |
287 | " %u unmarked extension (len %u/%zu)", | |
1da177e4 LT |
288 | blkoff / sizeof(union afs_dir_block), |
289 | offset, next, tmp, nlen); | |
290 | return -EIO; | |
291 | } | |
292 | ||
5b5e0928 | 293 | _debug("ENT[%zu.%u]: ext %u/%zu", |
1da177e4 LT |
294 | blkoff / sizeof(union afs_dir_block), |
295 | next, tmp, nlen); | |
296 | next++; | |
297 | } | |
298 | ||
299 | /* skip if starts before the current position */ | |
300 | if (offset < curr) | |
301 | continue; | |
302 | ||
303 | /* found the next entry */ | |
1bbae9f8 | 304 | if (!dir_emit(ctx, dire->u.name, nlen, |
1da177e4 | 305 | ntohl(dire->u.vnode), |
1bbae9f8 AV |
306 | ctx->actor == afs_lookup_filldir ? |
307 | ntohl(dire->u.unique) : DT_UNKNOWN)) { | |
1da177e4 LT |
308 | _leave(" = 0 [full]"); |
309 | return 0; | |
310 | } | |
311 | ||
1bbae9f8 | 312 | ctx->pos = blkoff + next * sizeof(union afs_dirent); |
1da177e4 LT |
313 | } |
314 | ||
315 | _leave(" = 1 [more]"); | |
316 | return 1; | |
ec26815a | 317 | } |
1da177e4 | 318 | |
1da177e4 | 319 | /* |
08e0e7c8 | 320 | * iterate through the data blob that lists the contents of an AFS directory |
1da177e4 | 321 | */ |
1bbae9f8 AV |
322 | static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx, |
323 | struct key *key) | |
1da177e4 | 324 | { |
08e0e7c8 | 325 | union afs_dir_block *dblock; |
1da177e4 LT |
326 | struct afs_dir_page *dbuf; |
327 | struct page *page; | |
328 | unsigned blkoff, limit; | |
329 | int ret; | |
330 | ||
1bbae9f8 | 331 | _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos); |
1da177e4 | 332 | |
08e0e7c8 | 333 | if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { |
1da177e4 LT |
334 | _leave(" = -ESTALE"); |
335 | return -ESTALE; | |
336 | } | |
337 | ||
338 | /* round the file position up to the next entry boundary */ | |
1bbae9f8 AV |
339 | ctx->pos += sizeof(union afs_dirent) - 1; |
340 | ctx->pos &= ~(sizeof(union afs_dirent) - 1); | |
1da177e4 LT |
341 | |
342 | /* walk through the blocks in sequence */ | |
343 | ret = 0; | |
1bbae9f8 AV |
344 | while (ctx->pos < dir->i_size) { |
345 | blkoff = ctx->pos & ~(sizeof(union afs_dir_block) - 1); | |
1da177e4 LT |
346 | |
347 | /* fetch the appropriate page from the directory */ | |
00d3b7a4 | 348 | page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key); |
1da177e4 LT |
349 | if (IS_ERR(page)) { |
350 | ret = PTR_ERR(page); | |
351 | break; | |
352 | } | |
353 | ||
354 | limit = blkoff & ~(PAGE_SIZE - 1); | |
355 | ||
356 | dbuf = page_address(page); | |
357 | ||
358 | /* deal with the individual blocks stashed on this page */ | |
359 | do { | |
360 | dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / | |
361 | sizeof(union afs_dir_block)]; | |
1bbae9f8 | 362 | ret = afs_dir_iterate_block(ctx, dblock, blkoff); |
1da177e4 LT |
363 | if (ret != 1) { |
364 | afs_dir_put_page(page); | |
365 | goto out; | |
366 | } | |
367 | ||
368 | blkoff += sizeof(union afs_dir_block); | |
369 | ||
1bbae9f8 | 370 | } while (ctx->pos < dir->i_size && blkoff < limit); |
1da177e4 LT |
371 | |
372 | afs_dir_put_page(page); | |
373 | ret = 0; | |
374 | } | |
375 | ||
ec26815a | 376 | out: |
1da177e4 LT |
377 | _leave(" = %d", ret); |
378 | return ret; | |
ec26815a | 379 | } |
1da177e4 | 380 | |
1da177e4 LT |
381 | /* |
382 | * read an AFS directory | |
383 | */ | |
1bbae9f8 | 384 | static int afs_readdir(struct file *file, struct dir_context *ctx) |
1da177e4 | 385 | { |
1bbae9f8 AV |
386 | return afs_dir_iterate(file_inode(file), |
387 | ctx, file->private_data); | |
ec26815a | 388 | } |
1da177e4 | 389 | |
1da177e4 LT |
390 | /* |
391 | * search the directory for a name | |
392 | * - if afs_dir_iterate_block() spots this function, it'll pass the FID | |
393 | * uniquifier through dtype | |
394 | */ | |
ac7576f4 MS |
395 | static int afs_lookup_filldir(struct dir_context *ctx, const char *name, |
396 | int nlen, loff_t fpos, u64 ino, unsigned dtype) | |
1da177e4 | 397 | { |
ac7576f4 MS |
398 | struct afs_lookup_cookie *cookie = |
399 | container_of(ctx, struct afs_lookup_cookie, ctx); | |
1da177e4 | 400 | |
1bbae9f8 AV |
401 | _enter("{%s,%u},%s,%u,,%llu,%u", |
402 | cookie->name.name, cookie->name.len, name, nlen, | |
ba3e0e1a | 403 | (unsigned long long) ino, dtype); |
1da177e4 | 404 | |
08e0e7c8 DH |
405 | /* insanity checks first */ |
406 | BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); | |
407 | BUILD_BUG_ON(sizeof(union afs_dirent) != 32); | |
408 | ||
1bbae9f8 AV |
409 | if (cookie->name.len != nlen || |
410 | memcmp(cookie->name.name, name, nlen) != 0) { | |
1da177e4 LT |
411 | _leave(" = 0 [no]"); |
412 | return 0; | |
413 | } | |
414 | ||
415 | cookie->fid.vnode = ino; | |
416 | cookie->fid.unique = dtype; | |
417 | cookie->found = 1; | |
418 | ||
419 | _leave(" = -1 [found]"); | |
420 | return -1; | |
ec26815a | 421 | } |
1da177e4 | 422 | |
1da177e4 | 423 | /* |
08e0e7c8 | 424 | * do a lookup in a directory |
260a9803 | 425 | * - just returns the FID the dentry name maps to if found |
1da177e4 | 426 | */ |
08e0e7c8 | 427 | static int afs_do_lookup(struct inode *dir, struct dentry *dentry, |
00d3b7a4 | 428 | struct afs_fid *fid, struct key *key) |
1da177e4 | 429 | { |
1bbae9f8 AV |
430 | struct afs_super_info *as = dir->i_sb->s_fs_info; |
431 | struct afs_lookup_cookie cookie = { | |
432 | .ctx.actor = afs_lookup_filldir, | |
433 | .name = dentry->d_name, | |
434 | .fid.vid = as->volume->vid | |
435 | }; | |
1da177e4 LT |
436 | int ret; |
437 | ||
a455589f | 438 | _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); |
1da177e4 | 439 | |
1da177e4 | 440 | /* search the directory */ |
1bbae9f8 | 441 | ret = afs_dir_iterate(dir, &cookie.ctx, key); |
1da177e4 | 442 | if (ret < 0) { |
08e0e7c8 DH |
443 | _leave(" = %d [iter]", ret); |
444 | return ret; | |
1da177e4 LT |
445 | } |
446 | ||
447 | ret = -ENOENT; | |
448 | if (!cookie.found) { | |
08e0e7c8 DH |
449 | _leave(" = -ENOENT [not found]"); |
450 | return -ENOENT; | |
1da177e4 LT |
451 | } |
452 | ||
08e0e7c8 DH |
453 | *fid = cookie.fid; |
454 | _leave(" = 0 { vn=%u u=%u }", fid->vnode, fid->unique); | |
455 | return 0; | |
456 | } | |
457 | ||
bec5eb61 | 458 | /* |
459 | * Try to auto mount the mountpoint with pseudo directory, if the autocell | |
460 | * operation is setted. | |
461 | */ | |
462 | static struct inode *afs_try_auto_mntpt( | |
463 | int ret, struct dentry *dentry, struct inode *dir, struct key *key, | |
464 | struct afs_fid *fid) | |
465 | { | |
466 | const char *devname = dentry->d_name.name; | |
467 | struct afs_vnode *vnode = AFS_FS_I(dir); | |
468 | struct inode *inode; | |
469 | ||
a455589f AV |
470 | _enter("%d, %p{%pd}, {%x:%u}, %p", |
471 | ret, dentry, dentry, vnode->fid.vid, vnode->fid.vnode, key); | |
bec5eb61 | 472 | |
473 | if (ret != -ENOENT || | |
474 | !test_bit(AFS_VNODE_AUTOCELL, &vnode->flags)) | |
475 | goto out; | |
476 | ||
477 | inode = afs_iget_autocell(dir, devname, strlen(devname), key); | |
478 | if (IS_ERR(inode)) { | |
479 | ret = PTR_ERR(inode); | |
480 | goto out; | |
481 | } | |
482 | ||
483 | *fid = AFS_FS_I(inode)->fid; | |
484 | _leave("= %p", inode); | |
485 | return inode; | |
486 | ||
487 | out: | |
488 | _leave("= %d", ret); | |
489 | return ERR_PTR(ret); | |
490 | } | |
491 | ||
08e0e7c8 DH |
492 | /* |
493 | * look up an entry in a directory | |
494 | */ | |
260a9803 | 495 | static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 496 | unsigned int flags) |
08e0e7c8 DH |
497 | { |
498 | struct afs_vnode *vnode; | |
499 | struct afs_fid fid; | |
500 | struct inode *inode; | |
00d3b7a4 | 501 | struct key *key; |
08e0e7c8 DH |
502 | int ret; |
503 | ||
260a9803 DH |
504 | vnode = AFS_FS_I(dir); |
505 | ||
a455589f AV |
506 | _enter("{%x:%u},%p{%pd},", |
507 | vnode->fid.vid, vnode->fid.vnode, dentry, dentry); | |
260a9803 | 508 | |
2b0143b5 | 509 | ASSERTCMP(d_inode(dentry), ==, NULL); |
08e0e7c8 | 510 | |
45222b9e | 511 | if (dentry->d_name.len >= AFSNAMEMAX) { |
08e0e7c8 DH |
512 | _leave(" = -ENAMETOOLONG"); |
513 | return ERR_PTR(-ENAMETOOLONG); | |
514 | } | |
515 | ||
08e0e7c8 DH |
516 | if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { |
517 | _leave(" = -ESTALE"); | |
518 | return ERR_PTR(-ESTALE); | |
519 | } | |
520 | ||
00d3b7a4 DH |
521 | key = afs_request_key(vnode->volume->cell); |
522 | if (IS_ERR(key)) { | |
523 | _leave(" = %ld [key]", PTR_ERR(key)); | |
e231c2ee | 524 | return ERR_CAST(key); |
00d3b7a4 DH |
525 | } |
526 | ||
260a9803 DH |
527 | ret = afs_validate(vnode, key); |
528 | if (ret < 0) { | |
529 | key_put(key); | |
530 | _leave(" = %d [val]", ret); | |
531 | return ERR_PTR(ret); | |
532 | } | |
533 | ||
00d3b7a4 | 534 | ret = afs_do_lookup(dir, dentry, &fid, key); |
1da177e4 | 535 | if (ret < 0) { |
bec5eb61 | 536 | inode = afs_try_auto_mntpt(ret, dentry, dir, key, &fid); |
537 | if (!IS_ERR(inode)) { | |
538 | key_put(key); | |
539 | goto success; | |
540 | } | |
541 | ||
542 | ret = PTR_ERR(inode); | |
00d3b7a4 | 543 | key_put(key); |
260a9803 DH |
544 | if (ret == -ENOENT) { |
545 | d_add(dentry, NULL); | |
546 | _leave(" = NULL [negative]"); | |
547 | return NULL; | |
548 | } | |
08e0e7c8 | 549 | _leave(" = %d [do]", ret); |
1da177e4 LT |
550 | return ERR_PTR(ret); |
551 | } | |
260a9803 | 552 | dentry->d_fsdata = (void *)(unsigned long) vnode->status.data_version; |
1da177e4 | 553 | |
08e0e7c8 | 554 | /* instantiate the dentry */ |
260a9803 | 555 | inode = afs_iget(dir->i_sb, key, &fid, NULL, NULL); |
00d3b7a4 | 556 | key_put(key); |
08e0e7c8 DH |
557 | if (IS_ERR(inode)) { |
558 | _leave(" = %ld", PTR_ERR(inode)); | |
e231c2ee | 559 | return ERR_CAST(inode); |
08e0e7c8 DH |
560 | } |
561 | ||
bec5eb61 | 562 | success: |
1da177e4 | 563 | d_add(dentry, inode); |
d6e43f75 | 564 | _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%u }", |
08e0e7c8 DH |
565 | fid.vnode, |
566 | fid.unique, | |
2b0143b5 DH |
567 | d_inode(dentry)->i_ino, |
568 | d_inode(dentry)->i_generation); | |
1da177e4 LT |
569 | |
570 | return NULL; | |
ec26815a | 571 | } |
1da177e4 | 572 | |
1da177e4 LT |
573 | /* |
574 | * check that a dentry lookup hit has found a valid entry | |
575 | * - NOTE! the hit can be a negative hit too, so we can't assume we have an | |
576 | * inode | |
1da177e4 | 577 | */ |
0b728e19 | 578 | static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) |
1da177e4 | 579 | { |
260a9803 | 580 | struct afs_vnode *vnode, *dir; |
dd0d9a46 | 581 | struct afs_fid uninitialized_var(fid); |
1da177e4 | 582 | struct dentry *parent; |
00d3b7a4 | 583 | struct key *key; |
260a9803 | 584 | void *dir_version; |
1da177e4 LT |
585 | int ret; |
586 | ||
0b728e19 | 587 | if (flags & LOOKUP_RCU) |
34286d66 NP |
588 | return -ECHILD; |
589 | ||
2b0143b5 | 590 | vnode = AFS_FS_I(d_inode(dentry)); |
08e0e7c8 | 591 | |
2b0143b5 | 592 | if (d_really_is_positive(dentry)) |
a455589f AV |
593 | _enter("{v={%x:%u} n=%pd fl=%lx},", |
594 | vnode->fid.vid, vnode->fid.vnode, dentry, | |
260a9803 DH |
595 | vnode->flags); |
596 | else | |
a455589f | 597 | _enter("{neg n=%pd}", dentry); |
1da177e4 | 598 | |
260a9803 | 599 | key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); |
00d3b7a4 DH |
600 | if (IS_ERR(key)) |
601 | key = NULL; | |
602 | ||
1da177e4 | 603 | /* lock down the parent dentry so we can peer at it */ |
08e0e7c8 | 604 | parent = dget_parent(dentry); |
2b0143b5 | 605 | dir = AFS_FS_I(d_inode(parent)); |
1da177e4 | 606 | |
260a9803 DH |
607 | /* validate the parent directory */ |
608 | if (test_bit(AFS_VNODE_MODIFIED, &dir->flags)) | |
609 | afs_validate(dir, key); | |
610 | ||
611 | if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { | |
a455589f | 612 | _debug("%pd: parent dir deleted", dentry); |
1da177e4 LT |
613 | goto out_bad; |
614 | } | |
615 | ||
260a9803 DH |
616 | dir_version = (void *) (unsigned long) dir->status.data_version; |
617 | if (dentry->d_fsdata == dir_version) | |
618 | goto out_valid; /* the dir contents are unchanged */ | |
1da177e4 | 619 | |
260a9803 DH |
620 | _debug("dir modified"); |
621 | ||
622 | /* search the directory for this vnode */ | |
623 | ret = afs_do_lookup(&dir->vfs_inode, dentry, &fid, key); | |
624 | switch (ret) { | |
625 | case 0: | |
626 | /* the filename maps to something */ | |
2b0143b5 | 627 | if (d_really_is_negative(dentry)) |
260a9803 | 628 | goto out_bad; |
2b0143b5 | 629 | if (is_bad_inode(d_inode(dentry))) { |
a455589f AV |
630 | printk("kAFS: afs_d_revalidate: %pd2 has bad inode\n", |
631 | dentry); | |
1da177e4 LT |
632 | goto out_bad; |
633 | } | |
634 | ||
1da177e4 LT |
635 | /* if the vnode ID has changed, then the dirent points to a |
636 | * different file */ | |
08e0e7c8 | 637 | if (fid.vnode != vnode->fid.vnode) { |
a455589f AV |
638 | _debug("%pd: dirent changed [%u != %u]", |
639 | dentry, fid.vnode, | |
08e0e7c8 | 640 | vnode->fid.vnode); |
1da177e4 LT |
641 | goto not_found; |
642 | } | |
643 | ||
644 | /* if the vnode ID uniqifier has changed, then the file has | |
260a9803 DH |
645 | * been deleted and replaced, and the original vnode ID has |
646 | * been reused */ | |
08e0e7c8 | 647 | if (fid.unique != vnode->fid.unique) { |
a455589f AV |
648 | _debug("%pd: file deleted (uq %u -> %u I:%u)", |
649 | dentry, fid.unique, | |
7a224228 | 650 | vnode->fid.unique, |
2b0143b5 | 651 | d_inode(dentry)->i_generation); |
08e0e7c8 DH |
652 | spin_lock(&vnode->lock); |
653 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
654 | spin_unlock(&vnode->lock); | |
260a9803 | 655 | goto not_found; |
1da177e4 | 656 | } |
260a9803 | 657 | goto out_valid; |
08e0e7c8 | 658 | |
260a9803 DH |
659 | case -ENOENT: |
660 | /* the filename is unknown */ | |
a455589f | 661 | _debug("%pd: dirent not found", dentry); |
2b0143b5 | 662 | if (d_really_is_positive(dentry)) |
260a9803 DH |
663 | goto not_found; |
664 | goto out_valid; | |
1da177e4 | 665 | |
260a9803 | 666 | default: |
a455589f AV |
667 | _debug("failed to iterate dir %pd: %d", |
668 | parent, ret); | |
08e0e7c8 DH |
669 | goto out_bad; |
670 | } | |
671 | ||
ec26815a | 672 | out_valid: |
260a9803 | 673 | dentry->d_fsdata = dir_version; |
1da177e4 | 674 | dput(parent); |
00d3b7a4 | 675 | key_put(key); |
1da177e4 LT |
676 | _leave(" = 1 [valid]"); |
677 | return 1; | |
678 | ||
679 | /* the dirent, if it exists, now points to a different vnode */ | |
ec26815a | 680 | not_found: |
1da177e4 LT |
681 | spin_lock(&dentry->d_lock); |
682 | dentry->d_flags |= DCACHE_NFSFS_RENAMED; | |
683 | spin_unlock(&dentry->d_lock); | |
684 | ||
ec26815a | 685 | out_bad: |
a455589f | 686 | _debug("dropping dentry %pd2", dentry); |
1da177e4 | 687 | dput(parent); |
00d3b7a4 | 688 | key_put(key); |
1da177e4 LT |
689 | |
690 | _leave(" = 0 [bad]"); | |
691 | return 0; | |
ec26815a | 692 | } |
1da177e4 | 693 | |
1da177e4 LT |
694 | /* |
695 | * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't | |
696 | * sleep) | |
697 | * - called from dput() when d_count is going to 0. | |
698 | * - return 1 to request dentry be unhashed, 0 otherwise | |
699 | */ | |
fe15ce44 | 700 | static int afs_d_delete(const struct dentry *dentry) |
1da177e4 | 701 | { |
a455589f | 702 | _enter("%pd", dentry); |
1da177e4 LT |
703 | |
704 | if (dentry->d_flags & DCACHE_NFSFS_RENAMED) | |
705 | goto zap; | |
706 | ||
2b0143b5 DH |
707 | if (d_really_is_positive(dentry) && |
708 | (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(d_inode(dentry))->flags) || | |
709 | test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(d_inode(dentry))->flags))) | |
bec5eb61 | 710 | goto zap; |
1da177e4 LT |
711 | |
712 | _leave(" = 0 [keep]"); | |
713 | return 0; | |
714 | ||
ec26815a | 715 | zap: |
1da177e4 LT |
716 | _leave(" = 1 [zap]"); |
717 | return 1; | |
ec26815a | 718 | } |
260a9803 DH |
719 | |
720 | /* | |
721 | * handle dentry release | |
722 | */ | |
723 | static void afs_d_release(struct dentry *dentry) | |
724 | { | |
a455589f | 725 | _enter("%pd", dentry); |
260a9803 DH |
726 | } |
727 | ||
728 | /* | |
729 | * create a directory on an AFS filesystem | |
730 | */ | |
18bb1db3 | 731 | static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
260a9803 DH |
732 | { |
733 | struct afs_file_status status; | |
734 | struct afs_callback cb; | |
735 | struct afs_server *server; | |
736 | struct afs_vnode *dvnode, *vnode; | |
737 | struct afs_fid fid; | |
738 | struct inode *inode; | |
739 | struct key *key; | |
740 | int ret; | |
741 | ||
742 | dvnode = AFS_FS_I(dir); | |
743 | ||
a455589f AV |
744 | _enter("{%x:%u},{%pd},%ho", |
745 | dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); | |
260a9803 | 746 | |
260a9803 DH |
747 | key = afs_request_key(dvnode->volume->cell); |
748 | if (IS_ERR(key)) { | |
749 | ret = PTR_ERR(key); | |
750 | goto error; | |
751 | } | |
752 | ||
753 | mode |= S_IFDIR; | |
754 | ret = afs_vnode_create(dvnode, key, dentry->d_name.name, | |
755 | mode, &fid, &status, &cb, &server); | |
756 | if (ret < 0) | |
757 | goto mkdir_error; | |
758 | ||
759 | inode = afs_iget(dir->i_sb, key, &fid, &status, &cb); | |
760 | if (IS_ERR(inode)) { | |
761 | /* ENOMEM at a really inconvenient time - just abandon the new | |
762 | * directory on the server */ | |
763 | ret = PTR_ERR(inode); | |
764 | goto iget_error; | |
765 | } | |
766 | ||
767 | /* apply the status report we've got for the new vnode */ | |
768 | vnode = AFS_FS_I(inode); | |
769 | spin_lock(&vnode->lock); | |
770 | vnode->update_cnt++; | |
771 | spin_unlock(&vnode->lock); | |
772 | afs_vnode_finalise_status_update(vnode, server); | |
773 | afs_put_server(server); | |
774 | ||
775 | d_instantiate(dentry, inode); | |
776 | if (d_unhashed(dentry)) { | |
777 | _debug("not hashed"); | |
778 | d_rehash(dentry); | |
779 | } | |
780 | key_put(key); | |
781 | _leave(" = 0"); | |
782 | return 0; | |
783 | ||
784 | iget_error: | |
785 | afs_put_server(server); | |
786 | mkdir_error: | |
787 | key_put(key); | |
788 | error: | |
789 | d_drop(dentry); | |
790 | _leave(" = %d", ret); | |
791 | return ret; | |
792 | } | |
793 | ||
794 | /* | |
795 | * remove a directory from an AFS filesystem | |
796 | */ | |
797 | static int afs_rmdir(struct inode *dir, struct dentry *dentry) | |
798 | { | |
799 | struct afs_vnode *dvnode, *vnode; | |
800 | struct key *key; | |
801 | int ret; | |
802 | ||
803 | dvnode = AFS_FS_I(dir); | |
804 | ||
a455589f AV |
805 | _enter("{%x:%u},{%pd}", |
806 | dvnode->fid.vid, dvnode->fid.vnode, dentry); | |
260a9803 | 807 | |
260a9803 DH |
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 | ||
2b0143b5 DH |
818 | if (d_really_is_positive(dentry)) { |
819 | vnode = AFS_FS_I(d_inode(dentry)); | |
260a9803 DH |
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 | ||
a455589f AV |
847 | _enter("{%x:%u},{%pd}", |
848 | dvnode->fid.vid, dvnode->fid.vnode, dentry); | |
260a9803 DH |
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 | ||
2b0143b5 DH |
860 | if (d_really_is_positive(dentry)) { |
861 | vnode = AFS_FS_I(d_inode(dentry)); | |
260a9803 DH |
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 | ||
2b0143b5 | 873 | if (d_really_is_positive(dentry)) { |
260a9803 DH |
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 | */ | |
2b0143b5 | 883 | vnode = AFS_FS_I(d_inode(dentry)); |
260a9803 DH |
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 | */ | |
4acdaf27 | 907 | static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 908 | bool excl) |
260a9803 DH |
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 | ||
a455589f AV |
921 | _enter("{%x:%u},{%pd},%ho,", |
922 | dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); | |
260a9803 | 923 | |
260a9803 DH |
924 | key = afs_request_key(dvnode->volume->cell); |
925 | if (IS_ERR(key)) { | |
926 | ret = PTR_ERR(key); | |
927 | goto error; | |
928 | } | |
929 | ||
930 | mode |= S_IFREG; | |
931 | ret = afs_vnode_create(dvnode, key, dentry->d_name.name, | |
932 | mode, &fid, &status, &cb, &server); | |
933 | if (ret < 0) | |
934 | goto create_error; | |
935 | ||
936 | inode = afs_iget(dir->i_sb, key, &fid, &status, &cb); | |
937 | if (IS_ERR(inode)) { | |
938 | /* ENOMEM at a really inconvenient time - just abandon the new | |
939 | * directory on the server */ | |
940 | ret = PTR_ERR(inode); | |
941 | goto iget_error; | |
942 | } | |
943 | ||
944 | /* apply the status report we've got for the new vnode */ | |
945 | vnode = AFS_FS_I(inode); | |
946 | spin_lock(&vnode->lock); | |
947 | vnode->update_cnt++; | |
948 | spin_unlock(&vnode->lock); | |
949 | afs_vnode_finalise_status_update(vnode, server); | |
950 | afs_put_server(server); | |
951 | ||
952 | d_instantiate(dentry, inode); | |
953 | if (d_unhashed(dentry)) { | |
954 | _debug("not hashed"); | |
955 | d_rehash(dentry); | |
956 | } | |
957 | key_put(key); | |
958 | _leave(" = 0"); | |
959 | return 0; | |
960 | ||
961 | iget_error: | |
962 | afs_put_server(server); | |
963 | create_error: | |
964 | key_put(key); | |
965 | error: | |
966 | d_drop(dentry); | |
967 | _leave(" = %d", ret); | |
968 | return ret; | |
969 | } | |
970 | ||
971 | /* | |
972 | * create a hard link between files in an AFS filesystem | |
973 | */ | |
974 | static int afs_link(struct dentry *from, struct inode *dir, | |
975 | struct dentry *dentry) | |
976 | { | |
977 | struct afs_vnode *dvnode, *vnode; | |
978 | struct key *key; | |
979 | int ret; | |
980 | ||
2b0143b5 | 981 | vnode = AFS_FS_I(d_inode(from)); |
260a9803 DH |
982 | dvnode = AFS_FS_I(dir); |
983 | ||
a455589f | 984 | _enter("{%x:%u},{%x:%u},{%pd}", |
260a9803 DH |
985 | vnode->fid.vid, vnode->fid.vnode, |
986 | dvnode->fid.vid, dvnode->fid.vnode, | |
a455589f | 987 | dentry); |
260a9803 | 988 | |
260a9803 DH |
989 | key = afs_request_key(dvnode->volume->cell); |
990 | if (IS_ERR(key)) { | |
991 | ret = PTR_ERR(key); | |
992 | goto error; | |
993 | } | |
994 | ||
995 | ret = afs_vnode_link(dvnode, vnode, key, dentry->d_name.name); | |
996 | if (ret < 0) | |
997 | goto link_error; | |
998 | ||
7de9c6ee | 999 | ihold(&vnode->vfs_inode); |
260a9803 DH |
1000 | d_instantiate(dentry, &vnode->vfs_inode); |
1001 | key_put(key); | |
1002 | _leave(" = 0"); | |
1003 | return 0; | |
1004 | ||
1005 | link_error: | |
1006 | key_put(key); | |
1007 | error: | |
1008 | d_drop(dentry); | |
1009 | _leave(" = %d", ret); | |
1010 | return ret; | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * create a symlink in an AFS filesystem | |
1015 | */ | |
1016 | static int afs_symlink(struct inode *dir, struct dentry *dentry, | |
1017 | const char *content) | |
1018 | { | |
1019 | struct afs_file_status status; | |
1020 | struct afs_server *server; | |
1021 | struct afs_vnode *dvnode, *vnode; | |
1022 | struct afs_fid fid; | |
1023 | struct inode *inode; | |
1024 | struct key *key; | |
1025 | int ret; | |
1026 | ||
1027 | dvnode = AFS_FS_I(dir); | |
1028 | ||
a455589f AV |
1029 | _enter("{%x:%u},{%pd},%s", |
1030 | dvnode->fid.vid, dvnode->fid.vnode, dentry, | |
260a9803 DH |
1031 | content); |
1032 | ||
260a9803 | 1033 | ret = -EINVAL; |
45222b9e | 1034 | if (strlen(content) >= AFSPATHMAX) |
260a9803 DH |
1035 | goto error; |
1036 | ||
1037 | key = afs_request_key(dvnode->volume->cell); | |
1038 | if (IS_ERR(key)) { | |
1039 | ret = PTR_ERR(key); | |
1040 | goto error; | |
1041 | } | |
1042 | ||
1043 | ret = afs_vnode_symlink(dvnode, key, dentry->d_name.name, content, | |
1044 | &fid, &status, &server); | |
1045 | if (ret < 0) | |
1046 | goto create_error; | |
1047 | ||
1048 | inode = afs_iget(dir->i_sb, key, &fid, &status, NULL); | |
1049 | if (IS_ERR(inode)) { | |
1050 | /* ENOMEM at a really inconvenient time - just abandon the new | |
1051 | * directory on the server */ | |
1052 | ret = PTR_ERR(inode); | |
1053 | goto iget_error; | |
1054 | } | |
1055 | ||
1056 | /* apply the status report we've got for the new vnode */ | |
1057 | vnode = AFS_FS_I(inode); | |
1058 | spin_lock(&vnode->lock); | |
1059 | vnode->update_cnt++; | |
1060 | spin_unlock(&vnode->lock); | |
1061 | afs_vnode_finalise_status_update(vnode, server); | |
1062 | afs_put_server(server); | |
1063 | ||
1064 | d_instantiate(dentry, inode); | |
1065 | if (d_unhashed(dentry)) { | |
1066 | _debug("not hashed"); | |
1067 | d_rehash(dentry); | |
1068 | } | |
1069 | key_put(key); | |
1070 | _leave(" = 0"); | |
1071 | return 0; | |
1072 | ||
1073 | iget_error: | |
1074 | afs_put_server(server); | |
1075 | create_error: | |
1076 | key_put(key); | |
1077 | error: | |
1078 | d_drop(dentry); | |
1079 | _leave(" = %d", ret); | |
1080 | return ret; | |
1081 | } | |
1082 | ||
1083 | /* | |
1084 | * rename a file in an AFS filesystem and/or move it between directories | |
1085 | */ | |
1086 | static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1cd66c93 MS |
1087 | struct inode *new_dir, struct dentry *new_dentry, |
1088 | unsigned int flags) | |
260a9803 DH |
1089 | { |
1090 | struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; | |
1091 | struct key *key; | |
1092 | int ret; | |
1093 | ||
1cd66c93 MS |
1094 | if (flags) |
1095 | return -EINVAL; | |
1096 | ||
2b0143b5 | 1097 | vnode = AFS_FS_I(d_inode(old_dentry)); |
260a9803 DH |
1098 | orig_dvnode = AFS_FS_I(old_dir); |
1099 | new_dvnode = AFS_FS_I(new_dir); | |
1100 | ||
a455589f | 1101 | _enter("{%x:%u},{%x:%u},{%x:%u},{%pd}", |
260a9803 DH |
1102 | orig_dvnode->fid.vid, orig_dvnode->fid.vnode, |
1103 | vnode->fid.vid, vnode->fid.vnode, | |
1104 | new_dvnode->fid.vid, new_dvnode->fid.vnode, | |
a455589f | 1105 | new_dentry); |
260a9803 | 1106 | |
260a9803 DH |
1107 | key = afs_request_key(orig_dvnode->volume->cell); |
1108 | if (IS_ERR(key)) { | |
1109 | ret = PTR_ERR(key); | |
1110 | goto error; | |
1111 | } | |
1112 | ||
1113 | ret = afs_vnode_rename(orig_dvnode, new_dvnode, key, | |
1114 | old_dentry->d_name.name, | |
1115 | new_dentry->d_name.name); | |
1116 | if (ret < 0) | |
1117 | goto rename_error; | |
1118 | key_put(key); | |
1119 | _leave(" = 0"); | |
1120 | return 0; | |
1121 | ||
1122 | rename_error: | |
1123 | key_put(key); | |
1124 | error: | |
1125 | d_drop(new_dentry); | |
1126 | _leave(" = %d", ret); | |
1127 | return ret; | |
1128 | } |