Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/init.h> | |
174cd4b1 | 18 | #include <linux/sched/signal.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
1da177e4 | 35 | #include <linux/vfs.h> |
9cdb3883 MN |
36 | #include <linux/inet.h> |
37 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
3fa0b4e2 | 39 | #include <linux/compat.h> |
d310310c | 40 | #include <linux/freezer.h> |
7c0f6ba6 | 41 | #include <linux/uaccess.h> |
1eb5d98f | 42 | #include <linux/iversion.h> |
1da177e4 | 43 | |
4ce79717 | 44 | #include "nfs4_fs.h" |
a72b4422 | 45 | #include "callback.h" |
1da177e4 | 46 | #include "delegation.h" |
d9ef5a8c | 47 | #include "iostat.h" |
f7b422b1 | 48 | #include "internal.h" |
8ec442ae | 49 | #include "fscache.h" |
e5e94017 | 50 | #include "pnfs.h" |
ab7017a3 | 51 | #include "nfs.h" |
1b340d01 | 52 | #include "netns.h" |
1da177e4 | 53 | |
f4ce1299 TM |
54 | #include "nfstrace.h" |
55 | ||
1da177e4 | 56 | #define NFSDBG_FACILITY NFSDBG_VFS |
1da177e4 | 57 | |
f43bf0be TM |
58 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
59 | ||
60 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 61 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 62 | |
1da177e4 | 63 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 64 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 65 | |
e18b890b | 66 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 67 | |
1da177e4 LT |
68 | static inline unsigned long |
69 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
70 | { | |
71 | return nfs_fileid_to_ino_t(fattr->fileid); | |
72 | } | |
73 | ||
210c7c17 | 74 | static int nfs_wait_killable(int mode) |
72cb77f4 | 75 | { |
416ad3c9 | 76 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
77 | if (signal_pending_state(mode, current)) |
78 | return -ERESTARTSYS; | |
72cb77f4 TM |
79 | return 0; |
80 | } | |
210c7c17 BC |
81 | |
82 | int nfs_wait_bit_killable(struct wait_bit_key *key, int mode) | |
83 | { | |
84 | return nfs_wait_killable(mode); | |
85 | } | |
89d77c8f | 86 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 87 | |
5e4def20 | 88 | int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode) |
210c7c17 | 89 | { |
5e4def20 | 90 | return nfs_wait_killable(mode); |
210c7c17 BC |
91 | } |
92 | ||
f43bf0be TM |
93 | /** |
94 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
95 | * @fileid: 64-bit fileid | |
96 | * | |
97 | * This function returns a 32-bit inode number if the boot parameter | |
98 | * nfs.enable_ino64 is zero. | |
99 | */ | |
100 | u64 nfs_compat_user_ino64(u64 fileid) | |
101 | { | |
3fa0b4e2 FF |
102 | #ifdef CONFIG_COMPAT |
103 | compat_ulong_t ino; | |
104 | #else | |
105 | unsigned long ino; | |
106 | #endif | |
f43bf0be TM |
107 | |
108 | if (enable_ino64) | |
109 | return fileid; | |
110 | ino = fileid; | |
111 | if (sizeof(ino) < sizeof(fileid)) | |
112 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
113 | return ino; | |
114 | } | |
115 | ||
eed99357 TM |
116 | int nfs_drop_inode(struct inode *inode) |
117 | { | |
118 | return NFS_STALE(inode) || generic_drop_inode(inode); | |
119 | } | |
120 | EXPORT_SYMBOL_GPL(nfs_drop_inode); | |
121 | ||
19d87ca3 | 122 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 123 | { |
da6d503a TM |
124 | /* |
125 | * The following should never happen... | |
126 | */ | |
f48407dd TM |
127 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
128 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); | |
ada70d94 | 129 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 130 | nfs_access_zap_cache(inode); |
f1fe29b4 | 131 | nfs_fscache_clear_inode(inode); |
1da177e4 | 132 | } |
89d77c8f | 133 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 134 | |
b57922d9 AV |
135 | void nfs_evict_inode(struct inode *inode) |
136 | { | |
91b0abe3 | 137 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 138 | clear_inode(inode); |
b57922d9 AV |
139 | nfs_clear_inode(inode); |
140 | } | |
141 | ||
9e1681c2 | 142 | int nfs_sync_inode(struct inode *inode) |
4d346bea | 143 | { |
95d9f6c3 | 144 | inode_dio_wait(inode); |
4d346bea TM |
145 | return nfs_wb_all(inode); |
146 | } | |
9e1681c2 | 147 | EXPORT_SYMBOL_GPL(nfs_sync_inode); |
4d346bea | 148 | |
29884df0 TM |
149 | /** |
150 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
151 | */ | |
152 | int nfs_sync_mapping(struct address_space *mapping) | |
153 | { | |
5cf95214 | 154 | int ret = 0; |
29884df0 | 155 | |
5cf95214 TM |
156 | if (mapping->nrpages != 0) { |
157 | unmap_mapping_range(mapping, 0, 0, 0); | |
158 | ret = nfs_wb_all(mapping->host); | |
159 | } | |
29884df0 TM |
160 | return ret; |
161 | } | |
162 | ||
187e593d TM |
163 | static int nfs_attribute_timeout(struct inode *inode) |
164 | { | |
165 | struct nfs_inode *nfsi = NFS_I(inode); | |
166 | ||
167 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); | |
168 | } | |
169 | ||
61540bf6 TM |
170 | static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags) |
171 | { | |
172 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
173 | ||
174 | /* Special case for the pagecache or access cache */ | |
175 | if (flags == NFS_INO_REVAL_PAGECACHE && | |
176 | !(cache_validity & NFS_INO_REVAL_FORCED)) | |
177 | return false; | |
178 | return (cache_validity & flags) != 0; | |
179 | } | |
180 | ||
181 | static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags) | |
182 | { | |
183 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
184 | ||
185 | if ((cache_validity & flags) != 0) | |
186 | return true; | |
187 | if (nfs_attribute_timeout(inode)) | |
188 | return true; | |
189 | return false; | |
190 | } | |
191 | ||
192 | bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags) | |
193 | { | |
194 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) | |
195 | return nfs_check_cache_invalid_delegated(inode, flags); | |
196 | ||
197 | return nfs_check_cache_invalid_not_delegated(inode, flags); | |
198 | } | |
199 | ||
6edf9609 TM |
200 | static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags) |
201 | { | |
202 | struct nfs_inode *nfsi = NFS_I(inode); | |
203 | ||
204 | if (inode->i_mapping->nrpages == 0) | |
205 | flags &= ~NFS_INO_INVALID_DATA; | |
206 | nfsi->cache_validity |= flags; | |
207 | if (flags & NFS_INO_INVALID_DATA) | |
208 | nfs_fscache_invalidate(inode); | |
209 | } | |
210 | ||
1da177e4 LT |
211 | /* |
212 | * Invalidate the local caches | |
213 | */ | |
b37b03b7 | 214 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
215 | { |
216 | struct nfs_inode *nfsi = NFS_I(inode); | |
217 | int mode = inode->i_mode; | |
218 | ||
91d5b470 CL |
219 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
220 | ||
c7c20973 TM |
221 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
222 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 223 | |
c3f52af3 | 224 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
de242c0b | 225 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
6edf9609 | 226 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
227 | | NFS_INO_INVALID_DATA |
228 | | NFS_INO_INVALID_ACCESS | |
229 | | NFS_INO_INVALID_ACL | |
6edf9609 | 230 | | NFS_INO_REVAL_PAGECACHE); |
aa9c2669 | 231 | } else |
6edf9609 | 232 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
233 | | NFS_INO_INVALID_ACCESS |
234 | | NFS_INO_INVALID_ACL | |
6edf9609 | 235 | | NFS_INO_REVAL_PAGECACHE); |
fd1defc2 | 236 | nfs_zap_label_cache_locked(nfsi); |
b37b03b7 | 237 | } |
dc59250c | 238 | |
b37b03b7 TM |
239 | void nfs_zap_caches(struct inode *inode) |
240 | { | |
241 | spin_lock(&inode->i_lock); | |
242 | nfs_zap_caches_locked(inode); | |
dc59250c | 243 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
244 | } |
245 | ||
cd9ae2b6 TM |
246 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
247 | { | |
248 | if (mapping->nrpages != 0) { | |
249 | spin_lock(&inode->i_lock); | |
6edf9609 | 250 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
cd9ae2b6 TM |
251 | spin_unlock(&inode->i_lock); |
252 | } | |
253 | } | |
254 | ||
f41f7418 | 255 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
256 | { |
257 | void (*clear_acl_cache)(struct inode *); | |
258 | ||
259 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
260 | if (clear_acl_cache != NULL) | |
261 | clear_acl_cache(inode); | |
dc59250c | 262 | spin_lock(&inode->i_lock); |
55296809 | 263 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 264 | spin_unlock(&inode->i_lock); |
1da177e4 | 265 | } |
1c606fb7 | 266 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 267 | |
c4812998 TM |
268 | void nfs_invalidate_atime(struct inode *inode) |
269 | { | |
270 | spin_lock(&inode->i_lock); | |
6edf9609 | 271 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
c4812998 TM |
272 | spin_unlock(&inode->i_lock); |
273 | } | |
ddda8e0a | 274 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 275 | |
1da177e4 | 276 | /* |
b37b03b7 TM |
277 | * Invalidate, but do not unhash, the inode. |
278 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 279 | */ |
b37b03b7 | 280 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 281 | { |
3a10c30a | 282 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 283 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
284 | } |
285 | ||
286 | struct nfs_find_desc { | |
287 | struct nfs_fh *fh; | |
288 | struct nfs_fattr *fattr; | |
289 | }; | |
290 | ||
291 | /* | |
292 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
293 | * this, and re-exported directories (also seen in NFSv2) | |
294 | * we are forced to allow 2 different inodes to have the same | |
295 | * i_ino. | |
296 | */ | |
297 | static int | |
298 | nfs_find_actor(struct inode *inode, void *opaque) | |
299 | { | |
300 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
301 | struct nfs_fh *fh = desc->fh; | |
302 | struct nfs_fattr *fattr = desc->fattr; | |
303 | ||
304 | if (NFS_FILEID(inode) != fattr->fileid) | |
305 | return 0; | |
f6488c9b JL |
306 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
307 | return 0; | |
1da177e4 LT |
308 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
309 | return 0; | |
310 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
311 | return 0; | |
312 | return 1; | |
313 | } | |
314 | ||
315 | static int | |
316 | nfs_init_locked(struct inode *inode, void *opaque) | |
317 | { | |
318 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
319 | struct nfs_fattr *fattr = desc->fattr; | |
320 | ||
99fadcd7 | 321 | set_nfs_fileid(inode, fattr->fileid); |
916ec34d | 322 | inode->i_mode = fattr->mode; |
1da177e4 LT |
323 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
324 | return 0; | |
325 | } | |
326 | ||
e058f70b | 327 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
fd1defc2 TM |
328 | static void nfs_clear_label_invalid(struct inode *inode) |
329 | { | |
330 | spin_lock(&inode->i_lock); | |
331 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; | |
332 | spin_unlock(&inode->i_lock); | |
333 | } | |
334 | ||
aa9c2669 DQ |
335 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
336 | struct nfs4_label *label) | |
337 | { | |
338 | int error; | |
339 | ||
340 | if (label == NULL) | |
341 | return; | |
342 | ||
aa9c2669 DQ |
343 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
344 | error = security_inode_notifysecctx(inode, label->label, | |
345 | label->len); | |
346 | if (error) | |
347 | printk(KERN_ERR "%s() %s %d " | |
348 | "security_inode_notifysecctx() %d\n", | |
349 | __func__, | |
350 | (char *)label->label, | |
351 | label->len, error); | |
fd1defc2 | 352 | nfs_clear_label_invalid(inode); |
aa9c2669 DQ |
353 | } |
354 | } | |
355 | ||
e058f70b SD |
356 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
357 | { | |
358 | struct nfs4_label *label = NULL; | |
359 | int minor_version = server->nfs_client->cl_minorversion; | |
360 | ||
361 | if (minor_version < 2) | |
362 | return label; | |
363 | ||
364 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
365 | return label; | |
366 | ||
367 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
368 | if (label == NULL) | |
369 | return ERR_PTR(-ENOMEM); | |
370 | ||
371 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
372 | if (label->label == NULL) { | |
373 | kfree(label); | |
374 | return ERR_PTR(-ENOMEM); | |
375 | } | |
376 | label->len = NFS4_MAXLABELLEN; | |
377 | ||
378 | return label; | |
379 | } | |
380 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 381 | #else |
829e57d7 | 382 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
aa9c2669 DQ |
383 | struct nfs4_label *label) |
384 | { | |
385 | } | |
e058f70b | 386 | #endif |
aa9c2669 | 387 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 388 | |
f174ff7a PT |
389 | /* Search for inode identified by fh, fileid and i_mode in inode cache. */ |
390 | struct inode * | |
391 | nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh) | |
392 | { | |
393 | struct nfs_find_desc desc = { | |
394 | .fh = fh, | |
395 | .fattr = fattr, | |
396 | }; | |
397 | struct inode *inode; | |
398 | unsigned long hash; | |
399 | ||
400 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) || | |
401 | !(fattr->valid & NFS_ATTR_FATTR_TYPE)) | |
402 | return NULL; | |
403 | ||
404 | hash = nfs_fattr_to_ino_t(fattr); | |
405 | inode = ilookup5(sb, hash, nfs_find_actor, &desc); | |
406 | ||
407 | dprintk("%s: returning %p\n", __func__, inode); | |
408 | return inode; | |
409 | } | |
410 | ||
1da177e4 LT |
411 | /* |
412 | * This is our front-end to iget that looks up inodes by file handle | |
413 | * instead of inode number. | |
414 | */ | |
415 | struct inode * | |
1775fd3e | 416 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
417 | { |
418 | struct nfs_find_desc desc = { | |
419 | .fh = fh, | |
420 | .fattr = fattr | |
421 | }; | |
03f28e3a | 422 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
423 | unsigned long hash; |
424 | ||
7ebb9315 BS |
425 | nfs_attr_check_mountpoint(sb, fattr); |
426 | ||
2ef47eb1 AS |
427 | if (nfs_attr_use_mounted_on_fileid(fattr)) |
428 | fattr->fileid = fattr->mounted_on_fileid; | |
429 | else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) | |
1da177e4 | 430 | goto out_no_inode; |
9e6e70f8 | 431 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 432 | goto out_no_inode; |
1da177e4 LT |
433 | |
434 | hash = nfs_fattr_to_ino_t(fattr); | |
435 | ||
03f28e3a TM |
436 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
437 | if (inode == NULL) { | |
438 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 439 | goto out_no_inode; |
03f28e3a | 440 | } |
1da177e4 LT |
441 | |
442 | if (inode->i_state & I_NEW) { | |
443 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 444 | unsigned long now = jiffies; |
1da177e4 LT |
445 | |
446 | /* We set i_ino for the few things that still rely on it, | |
447 | * such as stat(2) */ | |
448 | inode->i_ino = hash; | |
449 | ||
450 | /* We can't support update_atime(), since the server will reset it */ | |
451 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
452 | inode->i_mode = fattr->mode; | |
62ab460c TM |
453 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
454 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
6edf9609 | 455 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
1da177e4 LT |
456 | /* Why so? Because we want revalidate for devices/FIFOs, and |
457 | * that's precisely what we have in nfs_file_inode_operations. | |
458 | */ | |
8fa5c000 | 459 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 460 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 461 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 | 462 | inode->i_data.a_ops = &nfs_file_aops; |
1da177e4 | 463 | } else if (S_ISDIR(inode->i_mode)) { |
8fa5c000 | 464 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 465 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 466 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 467 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
468 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
469 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
470 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
471 | inode->i_op = &nfs_referral_inode_operations; | |
472 | else | |
473 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 474 | inode->i_fop = NULL; |
36d43a43 | 475 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 476 | } |
21fc61c7 | 477 | } else if (S_ISLNK(inode->i_mode)) { |
1da177e4 | 478 | inode->i_op = &nfs_symlink_inode_operations; |
21fc61c7 AV |
479 | inode_nohighmem(inode); |
480 | } else | |
1da177e4 LT |
481 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
482 | ||
9e6e70f8 TM |
483 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
484 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
485 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
1eb5d98f | 486 | inode_set_iversion_raw(inode, 0); |
9e6e70f8 | 487 | inode->i_size = 0; |
6d6b77f1 | 488 | clear_nlink(inode); |
9ff593c4 EB |
489 | inode->i_uid = make_kuid(&init_user_ns, -2); |
490 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
491 | inode->i_blocks = 0; |
492 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
493 | nfsi->write_io = 0; |
494 | nfsi->read_io = 0; | |
9e6e70f8 | 495 | |
33801147 | 496 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 497 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
498 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
499 | inode->i_atime = fattr->atime; | |
62ab460c | 500 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
6edf9609 | 501 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
502 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
503 | inode->i_mtime = fattr->mtime; | |
62ab460c | 504 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
6edf9609 | 505 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
506 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
507 | inode->i_ctime = fattr->ctime; | |
62ab460c | 508 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
6edf9609 | 509 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 | 510 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1eb5d98f | 511 | inode_set_iversion_raw(inode, fattr->change_attr); |
cd812599 | 512 | else |
5c675d64 TM |
513 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
514 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 TM |
515 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
516 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 517 | else |
6edf9609 TM |
518 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
519 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 | 520 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 521 | set_nlink(inode, fattr->nlink); |
62ab460c | 522 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
6edf9609 | 523 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
524 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
525 | inode->i_uid = fattr->uid; | |
62ab460c | 526 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
6edf9609 | 527 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
528 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
529 | inode->i_gid = fattr->gid; | |
62ab460c | 530 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
6edf9609 | 531 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
532 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
533 | inode->i_blocks = fattr->du.nfs2.blocks; | |
534 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
535 | /* |
536 | * report the blocks in 512byte units | |
537 | */ | |
538 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 539 | } |
aa9c2669 DQ |
540 | |
541 | nfs_setsecurity(inode, fattr, label); | |
542 | ||
1da177e4 | 543 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 544 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 545 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 546 | |
f1fe29b4 | 547 | nfs_fscache_init_inode(inode); |
ef79c097 | 548 | |
1da177e4 | 549 | unlock_new_inode(inode); |
26fde4df N |
550 | } else { |
551 | int err = nfs_refresh_inode(inode, fattr); | |
552 | if (err < 0) { | |
553 | iput(inode); | |
554 | inode = ERR_PTR(err); | |
555 | goto out_no_inode; | |
556 | } | |
557 | } | |
1e8968c5 | 558 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 559 | inode->i_sb->s_id, |
1e8968c5 | 560 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 561 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
562 | atomic_read(&inode->i_count)); |
563 | ||
564 | out: | |
565 | return inode; | |
566 | ||
567 | out_no_inode: | |
03f28e3a | 568 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
569 | goto out; |
570 | } | |
89d77c8f | 571 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 572 | |
536e43d1 | 573 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN) |
1da177e4 LT |
574 | |
575 | int | |
576 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
577 | { | |
2b0143b5 | 578 | struct inode *inode = d_inode(dentry); |
987f8dfc | 579 | struct nfs_fattr *fattr; |
ae57ca0f | 580 | int error = 0; |
1da177e4 | 581 | |
91d5b470 CL |
582 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
583 | ||
188b95dd JL |
584 | /* skip mode change if it's just for clearing setuid/setgid */ |
585 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
586 | attr->ia_valid &= ~ATTR_MODE; | |
587 | ||
1da177e4 | 588 | if (attr->ia_valid & ATTR_SIZE) { |
08a899d5 CH |
589 | BUG_ON(!S_ISREG(inode->i_mode)); |
590 | ||
ae57ca0f KM |
591 | error = inode_newsize_ok(inode, attr->ia_size); |
592 | if (error) | |
593 | return error; | |
594 | ||
595 | if (attr->ia_size == i_size_read(inode)) | |
1da177e4 LT |
596 | attr->ia_valid &= ~ATTR_SIZE; |
597 | } | |
598 | ||
599 | /* Optimization: if the end result is no change, don't RPC */ | |
600 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 601 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
602 | return 0; |
603 | ||
f4ce1299 TM |
604 | trace_nfs_setattr_enter(inode); |
605 | ||
755c1e20 | 606 | /* Write all dirty data */ |
4d346bea TM |
607 | if (S_ISREG(inode->i_mode)) |
608 | nfs_sync_inode(inode); | |
987f8dfc TM |
609 | |
610 | fattr = nfs_alloc_fattr(); | |
ae57ca0f KM |
611 | if (fattr == NULL) { |
612 | error = -ENOMEM; | |
987f8dfc | 613 | goto out; |
ae57ca0f KM |
614 | } |
615 | ||
642ac549 TM |
616 | /* |
617 | * Return any delegations if we're going to change ACLs | |
618 | */ | |
619 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 620 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 621 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 622 | if (error == 0) |
aa9c2669 | 623 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
624 | nfs_free_fattr(fattr); |
625 | out: | |
f4ce1299 | 626 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
627 | return error; |
628 | } | |
ddda8e0a | 629 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 630 | |
a3d01454 TM |
631 | /** |
632 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
633 | * @inode: inode of the file used | |
634 | * @offset: file offset to start truncating | |
635 | * | |
636 | * This is a copy of the common vmtruncate, but with the locking | |
637 | * corrected to take into account the fact that NFS requires | |
638 | * inode->i_size to be updated under the inode->i_lock. | |
f044636d | 639 | * Note: must be called with inode->i_lock held! |
a3d01454 TM |
640 | */ |
641 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
642 | { | |
c08d3b0e | 643 | int err; |
a3d01454 | 644 | |
c08d3b0e | 645 | err = inode_newsize_ok(inode, offset); |
646 | if (err) | |
647 | goto out; | |
a3d01454 | 648 | |
c08d3b0e | 649 | i_size_write(inode, offset); |
6edf9609 TM |
650 | /* Optimisation */ |
651 | if (offset == 0) | |
652 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA; | |
c08d3b0e | 653 | |
f044636d | 654 | spin_unlock(&inode->i_lock); |
7caef267 | 655 | truncate_pagecache(inode, offset); |
f044636d | 656 | spin_lock(&inode->i_lock); |
c08d3b0e | 657 | out: |
658 | return err; | |
a3d01454 TM |
659 | } |
660 | ||
65e4308d TM |
661 | /** |
662 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
663 | * @inode: pointer to struct inode | |
664 | * @attr: pointer to struct iattr | |
665 | * | |
666 | * Note: we do this in the *proc.c in order to ensure that | |
667 | * it works for things like exclusive creates too. | |
668 | */ | |
f044636d TM |
669 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, |
670 | struct nfs_fattr *fattr) | |
65e4308d | 671 | { |
f044636d TM |
672 | /* Barrier: bump the attribute generation count. */ |
673 | nfs_fattr_set_barrier(fattr); | |
674 | ||
675 | spin_lock(&inode->i_lock); | |
676 | NFS_I(inode)->attr_gencount = fattr->gencount; | |
65e4308d | 677 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
1da177e4 | 678 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
679 | int mode = attr->ia_mode & S_IALLUGO; |
680 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
681 | inode->i_mode = mode; |
682 | } | |
683 | if ((attr->ia_valid & ATTR_UID) != 0) | |
684 | inode->i_uid = attr->ia_uid; | |
685 | if ((attr->ia_valid & ATTR_GID) != 0) | |
686 | inode->i_gid = attr->ia_gid; | |
6edf9609 TM |
687 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
688 | | NFS_INO_INVALID_ACL); | |
65e4308d TM |
689 | } |
690 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 691 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 692 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 693 | } |
616c3196 JL |
694 | if (fattr->valid) |
695 | nfs_update_inode(inode, fattr); | |
696 | else | |
697 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; | |
f044636d | 698 | spin_unlock(&inode->i_lock); |
1da177e4 | 699 | } |
ddda8e0a | 700 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 701 | |
1bcf4c5c | 702 | static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry) |
311324ad TM |
703 | { |
704 | struct dentry *parent; | |
705 | ||
1bcf4c5c TM |
706 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) |
707 | return; | |
311324ad | 708 | parent = dget_parent(dentry); |
2b0143b5 | 709 | nfs_force_use_readdirplus(d_inode(parent)); |
311324ad TM |
710 | dput(parent); |
711 | } | |
712 | ||
1bcf4c5c TM |
713 | static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry) |
714 | { | |
715 | struct dentry *parent; | |
716 | ||
717 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) | |
718 | return; | |
719 | parent = dget_parent(dentry); | |
720 | nfs_advise_use_readdirplus(d_inode(parent)); | |
721 | dput(parent); | |
722 | } | |
723 | ||
311324ad TM |
724 | static bool nfs_need_revalidate_inode(struct inode *inode) |
725 | { | |
726 | if (NFS_I(inode)->cache_validity & | |
727 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
728 | return true; | |
729 | if (nfs_attribute_cache_expired(inode)) | |
730 | return true; | |
731 | return false; | |
732 | } | |
733 | ||
a528d35e DH |
734 | int nfs_getattr(const struct path *path, struct kstat *stat, |
735 | u32 request_mask, unsigned int query_flags) | |
1da177e4 | 736 | { |
a528d35e | 737 | struct inode *inode = d_inode(path->dentry); |
9ccee940 TM |
738 | struct nfs_server *server = NFS_SERVER(inode); |
739 | unsigned long cache_validity; | |
16caf5b6 | 740 | int err = 0; |
9ccee940 TM |
741 | bool force_sync = query_flags & AT_STATX_FORCE_SYNC; |
742 | bool do_update = false; | |
1da177e4 | 743 | |
f4ce1299 | 744 | trace_nfs_getattr_enter(inode); |
9ccee940 TM |
745 | |
746 | if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) | |
747 | goto out_no_update; | |
748 | ||
acdc53b2 | 749 | /* Flush out writes to the server in order to update c/mtime. */ |
9ccee940 TM |
750 | if ((request_mask & (STATX_CTIME|STATX_MTIME)) && |
751 | S_ISREG(inode->i_mode)) { | |
79566ef0 | 752 | err = filemap_write_and_wait(inode->i_mapping); |
acdc53b2 TM |
753 | if (err) |
754 | goto out; | |
28c494c5 | 755 | } |
fc33a7bb CH |
756 | |
757 | /* | |
758 | * We may force a getattr if the user cares about atime. | |
759 | * | |
760 | * Note that we only have to check the vfsmount flags here: | |
761 | * - NFS always sets S_NOATIME by so checking it would give a | |
762 | * bogus result | |
1751e8a6 | 763 | * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is |
fc33a7bb CH |
764 | * no point in checking those. |
765 | */ | |
a528d35e DH |
766 | if ((path->mnt->mnt_flags & MNT_NOATIME) || |
767 | ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
9ccee940 TM |
768 | request_mask &= ~STATX_ATIME; |
769 | ||
770 | /* Is the user requesting attributes that might need revalidation? */ | |
771 | if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME| | |
772 | STATX_MTIME|STATX_UID|STATX_GID| | |
773 | STATX_SIZE|STATX_BLOCKS))) | |
774 | goto out_no_revalidate; | |
775 | ||
776 | /* Check whether the cached attributes are stale */ | |
777 | do_update |= force_sync || nfs_attribute_cache_expired(inode); | |
778 | cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
779 | do_update |= cache_validity & | |
780 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL); | |
781 | if (request_mask & STATX_ATIME) | |
782 | do_update |= cache_validity & NFS_INO_INVALID_ATIME; | |
783 | if (request_mask & (STATX_CTIME|STATX_MTIME)) | |
784 | do_update |= cache_validity & NFS_INO_REVAL_PAGECACHE; | |
785 | if (do_update) { | |
786 | /* Update the attribute cache */ | |
59b86d85 HT |
787 | if (!(server->flags & NFS_MOUNT_NOAC)) |
788 | nfs_readdirplus_parent_cache_miss(path->dentry); | |
789 | else | |
790 | nfs_readdirplus_parent_cache_hit(path->dentry); | |
311324ad | 791 | err = __nfs_revalidate_inode(server, inode); |
9ccee940 TM |
792 | if (err) |
793 | goto out; | |
1bcf4c5c | 794 | } else |
a528d35e | 795 | nfs_readdirplus_parent_cache_hit(path->dentry); |
9ccee940 TM |
796 | out_no_revalidate: |
797 | /* Only return attributes that were revalidated. */ | |
798 | stat->result_mask &= request_mask; | |
799 | out_no_update: | |
800 | generic_fillattr(inode, stat); | |
801 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); | |
802 | if (S_ISDIR(inode->i_mode)) | |
803 | stat->blksize = NFS_SERVER(inode)->dtsize; | |
acdc53b2 | 804 | out: |
f4ce1299 | 805 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
806 | return err; |
807 | } | |
ddda8e0a | 808 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 809 | |
f11ac8db TM |
810 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
811 | { | |
2f62b5aa | 812 | refcount_set(&l_ctx->count, 1); |
d51fdb87 | 813 | l_ctx->lockowner = current->files; |
f11ac8db | 814 | INIT_LIST_HEAD(&l_ctx->list); |
210c7c17 | 815 | atomic_set(&l_ctx->io_count, 0); |
f11ac8db TM |
816 | } |
817 | ||
818 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
819 | { | |
8c86899f TM |
820 | struct nfs_lock_context *head = &ctx->lock_context; |
821 | struct nfs_lock_context *pos = head; | |
f11ac8db | 822 | |
8c86899f | 823 | do { |
d51fdb87 | 824 | if (pos->lockowner != current->files) |
f11ac8db | 825 | continue; |
2f62b5aa | 826 | refcount_inc(&pos->count); |
f11ac8db | 827 | return pos; |
8c86899f | 828 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
829 | return NULL; |
830 | } | |
831 | ||
832 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
833 | { | |
834 | struct nfs_lock_context *res, *new = NULL; | |
2b0143b5 | 835 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db TM |
836 | |
837 | spin_lock(&inode->i_lock); | |
838 | res = __nfs_find_lock_context(ctx); | |
839 | if (res == NULL) { | |
840 | spin_unlock(&inode->i_lock); | |
841 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
842 | if (new == NULL) | |
b3c54de6 | 843 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
844 | nfs_init_lock_context(new); |
845 | spin_lock(&inode->i_lock); | |
846 | res = __nfs_find_lock_context(ctx); | |
847 | if (res == NULL) { | |
848 | list_add_tail(&new->list, &ctx->lock_context.list); | |
849 | new->open_context = ctx; | |
850 | res = new; | |
851 | new = NULL; | |
852 | } | |
853 | } | |
854 | spin_unlock(&inode->i_lock); | |
855 | kfree(new); | |
856 | return res; | |
857 | } | |
1c6dcbe5 | 858 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
859 | |
860 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
861 | { | |
862 | struct nfs_open_context *ctx = l_ctx->open_context; | |
2b0143b5 | 863 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db | 864 | |
2f62b5aa | 865 | if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock)) |
f11ac8db TM |
866 | return; |
867 | list_del(&l_ctx->list); | |
868 | spin_unlock(&inode->i_lock); | |
869 | kfree(l_ctx); | |
870 | } | |
1c6dcbe5 | 871 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 872 | |
7fe5c398 TM |
873 | /** |
874 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
875 | * @ctx: pointer to context | |
876 | * @is_sync: is this a synchronous close | |
877 | * | |
5cf9d706 TM |
878 | * Ensure that the attributes are up to date if we're mounted |
879 | * with close-to-open semantics and we have cached data that will | |
880 | * need to be revalidated on open. | |
7fe5c398 TM |
881 | */ |
882 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
883 | { | |
5cf9d706 | 884 | struct nfs_inode *nfsi; |
7fe5c398 TM |
885 | struct inode *inode; |
886 | struct nfs_server *server; | |
887 | ||
888 | if (!(ctx->mode & FMODE_WRITE)) | |
889 | return; | |
890 | if (!is_sync) | |
891 | return; | |
2b0143b5 | 892 | inode = d_inode(ctx->dentry); |
58ff4184 TM |
893 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
894 | return; | |
5cf9d706 TM |
895 | nfsi = NFS_I(inode); |
896 | if (inode->i_mapping->nrpages == 0) | |
897 | return; | |
898 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
899 | return; | |
900 | if (!list_empty(&nfsi->open_files)) | |
7fe5c398 TM |
901 | return; |
902 | server = NFS_SERVER(inode); | |
903 | if (server->flags & NFS_MOUNT_NOCTO) | |
904 | return; | |
905 | nfs_revalidate_inode(server, inode); | |
906 | } | |
ddda8e0a | 907 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 908 | |
532d4def N |
909 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, |
910 | fmode_t f_mode, | |
911 | struct file *filp) | |
1da177e4 LT |
912 | { |
913 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
914 | struct rpc_cred *cred = rpc_lookup_cred(); |
915 | if (IS_ERR(cred)) | |
916 | return ERR_CAST(cred); | |
1da177e4 | 917 | |
f52720ca | 918 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
919 | if (!ctx) { |
920 | put_rpccred(cred); | |
921 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 922 | } |
5ede7b1c AV |
923 | nfs_sb_active(dentry->d_sb); |
924 | ctx->dentry = dget(dentry); | |
925 | ctx->cred = cred; | |
926 | ctx->state = NULL; | |
927 | ctx->mode = f_mode; | |
928 | ctx->flags = 0; | |
929 | ctx->error = 0; | |
532d4def | 930 | ctx->flock_owner = (fl_owner_t)filp; |
5ede7b1c AV |
931 | nfs_init_lock_context(&ctx->lock_context); |
932 | ctx->lock_context.open_context = ctx; | |
933 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 934 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
935 | return ctx; |
936 | } | |
89d77c8f | 937 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
938 | |
939 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
940 | { | |
941 | if (ctx != NULL) | |
2f62b5aa | 942 | refcount_inc(&ctx->lock_context.count); |
1da177e4 LT |
943 | return ctx; |
944 | } | |
89d77c8f | 945 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 946 | |
7fe5c398 | 947 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 948 | { |
2b0143b5 | 949 | struct inode *inode = d_inode(ctx->dentry); |
3d4ff43d | 950 | struct super_block *sb = ctx->dentry->d_sb; |
3bec63db | 951 | |
5c78f58e | 952 | if (!list_empty(&ctx->list)) { |
2f62b5aa | 953 | if (!refcount_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
ef84303e BH |
954 | return; |
955 | list_del(&ctx->list); | |
956 | spin_unlock(&inode->i_lock); | |
2f62b5aa | 957 | } else if (!refcount_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 958 | return; |
5c78f58e TM |
959 | if (inode != NULL) |
960 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
961 | if (ctx->cred != NULL) |
962 | put_rpccred(ctx->cred); | |
3d4ff43d | 963 | dput(ctx->dentry); |
322b2b90 | 964 | nfs_sb_deactive(sb); |
82be417a | 965 | kfree(ctx->mdsthreshold); |
3bec63db TM |
966 | kfree(ctx); |
967 | } | |
968 | ||
a49c3c77 TM |
969 | void put_nfs_open_context(struct nfs_open_context *ctx) |
970 | { | |
971 | __put_nfs_open_context(ctx, 0); | |
972 | } | |
89d77c8f | 973 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 974 | |
4eae5014 TM |
975 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
976 | { | |
977 | __put_nfs_open_context(ctx, 1); | |
978 | } | |
979 | ||
1da177e4 LT |
980 | /* |
981 | * Ensure that mmap has a recent RPC credential for use when writing out | |
982 | * shared pages | |
983 | */ | |
c45ffdd2 | 984 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 985 | { |
2b0143b5 | 986 | struct inode *inode = d_inode(ctx->dentry); |
1da177e4 LT |
987 | struct nfs_inode *nfsi = NFS_I(inode); |
988 | ||
1da177e4 | 989 | spin_lock(&inode->i_lock); |
ca0daa27 TM |
990 | if (ctx->mode & FMODE_WRITE) |
991 | list_add(&ctx->list, &nfsi->open_files); | |
992 | else | |
993 | list_add_tail(&ctx->list, &nfsi->open_files); | |
1da177e4 LT |
994 | spin_unlock(&inode->i_lock); |
995 | } | |
c45ffdd2 TM |
996 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
997 | ||
998 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
999 | { | |
1000 | filp->private_data = get_nfs_open_context(ctx); | |
1001 | if (list_empty(&ctx->list)) | |
1002 | nfs_inode_attach_open_context(ctx); | |
1003 | } | |
89d77c8f | 1004 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 1005 | |
d530838b TM |
1006 | /* |
1007 | * Given an inode, search for an open context with the desired characteristics | |
1008 | */ | |
dc0b027d | 1009 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
1010 | { |
1011 | struct nfs_inode *nfsi = NFS_I(inode); | |
1012 | struct nfs_open_context *pos, *ctx = NULL; | |
1013 | ||
1014 | spin_lock(&inode->i_lock); | |
1015 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
1016 | if (cred != NULL && pos->cred != cred) |
1017 | continue; | |
1544fa0f TM |
1018 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
1019 | continue; | |
1020 | ctx = get_nfs_open_context(pos); | |
1021 | break; | |
1da177e4 LT |
1022 | } |
1023 | spin_unlock(&inode->i_lock); | |
1024 | return ctx; | |
1025 | } | |
1026 | ||
aff8d8dc | 1027 | void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 1028 | { |
cd3758e3 | 1029 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
1030 | |
1031 | if (ctx) { | |
2b0143b5 | 1032 | struct inode *inode = d_inode(ctx->dentry); |
c45ffdd2 | 1033 | |
0bcbf039 PT |
1034 | /* |
1035 | * We fatal error on write before. Try to writeback | |
1036 | * every page again. | |
1037 | */ | |
1038 | if (ctx->error < 0) | |
1039 | invalidate_inode_pages2(inode->i_mapping); | |
1da177e4 LT |
1040 | filp->private_data = NULL; |
1041 | spin_lock(&inode->i_lock); | |
1042 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
1043 | spin_unlock(&inode->i_lock); | |
4eae5014 | 1044 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
1045 | } |
1046 | } | |
1047 | ||
1048 | /* | |
1049 | * These allocate and release file read/write context information. | |
1050 | */ | |
1051 | int nfs_open(struct inode *inode, struct file *filp) | |
1052 | { | |
1053 | struct nfs_open_context *ctx; | |
1da177e4 | 1054 | |
532d4def | 1055 | ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp); |
5ede7b1c AV |
1056 | if (IS_ERR(ctx)) |
1057 | return PTR_ERR(ctx); | |
1da177e4 LT |
1058 | nfs_file_set_open_context(filp, ctx); |
1059 | put_nfs_open_context(ctx); | |
f1fe29b4 | 1060 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
1061 | return 0; |
1062 | } | |
1063 | ||
1da177e4 LT |
1064 | /* |
1065 | * This function is called whenever some part of NFS notices that | |
1066 | * the cached attributes have to be refreshed. | |
1067 | */ | |
1068 | int | |
1069 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1070 | { | |
1071 | int status = -ESTALE; | |
1775fd3e | 1072 | struct nfs4_label *label = NULL; |
a3cba2aa | 1073 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 1074 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1075 | |
1e8968c5 NV |
1076 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
1077 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 1078 | |
f4ce1299 TM |
1079 | trace_nfs_revalidate_inode_enter(inode); |
1080 | ||
85233a7a | 1081 | if (is_bad_inode(inode)) |
691beb13 | 1082 | goto out; |
1da177e4 | 1083 | if (NFS_STALE(inode)) |
412d582e | 1084 | goto out; |
7fdc49c4 | 1085 | |
ac46bd37 TM |
1086 | /* pNFS: Attributes aren't updated until we layoutcommit */ |
1087 | if (S_ISREG(inode->i_mode)) { | |
1088 | status = pnfs_sync_inode(inode, false); | |
1089 | if (status) | |
1090 | goto out; | |
1091 | } | |
1092 | ||
a3cba2aa TM |
1093 | status = -ENOMEM; |
1094 | fattr = nfs_alloc_fattr(); | |
1095 | if (fattr == NULL) | |
1096 | goto out; | |
1097 | ||
691beb13 | 1098 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
1099 | |
1100 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
1101 | if (IS_ERR(label)) { | |
1102 | status = PTR_ERR(label); | |
1103 | goto out; | |
1104 | } | |
1105 | ||
1775fd3e | 1106 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 | 1107 | if (status != 0) { |
1e8968c5 | 1108 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 1109 | inode->i_sb->s_id, |
1e8968c5 | 1110 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
1111 | if (status == -ESTALE) { |
1112 | nfs_zap_caches(inode); | |
1113 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 1114 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 1115 | } |
14c43f76 | 1116 | goto err_out; |
1da177e4 LT |
1117 | } |
1118 | ||
a3cba2aa | 1119 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 1120 | if (status) { |
1e8968c5 | 1121 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 1122 | inode->i_sb->s_id, |
1e8968c5 | 1123 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 1124 | goto err_out; |
1da177e4 | 1125 | } |
55296809 | 1126 | |
24aa1fe6 | 1127 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1128 | nfs_zap_acl_cache(inode); |
55296809 | 1129 | |
3da580aa JL |
1130 | nfs_setsecurity(inode, fattr, label); |
1131 | ||
1e8968c5 | 1132 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 1133 | inode->i_sb->s_id, |
1e8968c5 | 1134 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 1135 | |
14c43f76 DQ |
1136 | err_out: |
1137 | nfs4_label_free(label); | |
1138 | out: | |
a3cba2aa | 1139 | nfs_free_fattr(fattr); |
f4ce1299 | 1140 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
1141 | return status; |
1142 | } | |
1143 | ||
43f291cd | 1144 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 1145 | { |
b4d2314b | 1146 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 1147 | return 0; |
d7cf8dd0 | 1148 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
1149 | } |
1150 | ||
1151 | /** | |
1152 | * nfs_revalidate_inode - Revalidate the inode attributes | |
1153 | * @server - pointer to nfs_server struct | |
1154 | * @inode - pointer to inode struct | |
1155 | * | |
1156 | * Updates inode attribute information by retrieving the data from the server. | |
1157 | */ | |
1158 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1159 | { | |
311324ad | 1160 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1161 | return NFS_STALE(inode) ? -ESTALE : 0; |
1162 | return __nfs_revalidate_inode(server, inode); | |
1163 | } | |
1c606fb7 | 1164 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1165 | |
1cda707d | 1166 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1167 | { |
1168 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1169 | int ret; |
1170 | ||
717d44e8 | 1171 | if (mapping->nrpages != 0) { |
f8806c84 TM |
1172 | if (S_ISREG(inode->i_mode)) { |
1173 | ret = nfs_sync_mapping(mapping); | |
1174 | if (ret < 0) | |
1175 | return ret; | |
1176 | } | |
1177 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1178 | if (ret < 0) |
1179 | return ret; | |
1180 | } | |
d529ef83 JL |
1181 | if (S_ISDIR(inode->i_mode)) { |
1182 | spin_lock(&inode->i_lock); | |
717d44e8 | 1183 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1184 | spin_unlock(&inode->i_lock); |
1185 | } | |
717d44e8 | 1186 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1187 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1188 | |
1e8968c5 NV |
1189 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1190 | inode->i_sb->s_id, | |
1191 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1192 | return 0; |
1193 | } | |
1194 | ||
1cd9cb05 | 1195 | bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
b4b1eadf | 1196 | { |
61540bf6 TM |
1197 | return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) || |
1198 | NFS_STALE(inode); | |
b4b1eadf TM |
1199 | } |
1200 | ||
0d0def49 AV |
1201 | int nfs_revalidate_mapping_rcu(struct inode *inode) |
1202 | { | |
1203 | struct nfs_inode *nfsi = NFS_I(inode); | |
1204 | unsigned long *bitlock = &nfsi->flags; | |
1205 | int ret = 0; | |
1206 | ||
1207 | if (IS_SWAPFILE(inode)) | |
1208 | goto out; | |
1209 | if (nfs_mapping_need_revalidate_inode(inode)) { | |
1210 | ret = -ECHILD; | |
1211 | goto out; | |
1212 | } | |
1213 | spin_lock(&inode->i_lock); | |
1214 | if (test_bit(NFS_INO_INVALIDATING, bitlock) || | |
1215 | (nfsi->cache_validity & NFS_INO_INVALID_DATA)) | |
1216 | ret = -ECHILD; | |
1217 | spin_unlock(&inode->i_lock); | |
1218 | out: | |
1219 | return ret; | |
1220 | } | |
1221 | ||
717d44e8 | 1222 | /** |
be527494 | 1223 | * nfs_revalidate_mapping - Revalidate the pagecache |
717d44e8 TM |
1224 | * @inode - pointer to host inode |
1225 | * @mapping - pointer to mapping | |
717d44e8 | 1226 | */ |
be527494 TM |
1227 | int nfs_revalidate_mapping(struct inode *inode, |
1228 | struct address_space *mapping) | |
717d44e8 TM |
1229 | { |
1230 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1231 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1232 | int ret = 0; |
dc59250c | 1233 | |
29418aa4 MG |
1234 | /* swapfiles are not supposed to be shared. */ |
1235 | if (IS_SWAPFILE(inode)) | |
1236 | goto out; | |
1237 | ||
b4b1eadf | 1238 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1239 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1240 | if (ret < 0) | |
1241 | goto out; | |
7d52e862 | 1242 | } |
d529ef83 JL |
1243 | |
1244 | /* | |
1245 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1246 | * invalidations that come in while we're shooting down the mappings | |
1247 | * are respected. But, that leaves a race window where one revalidator | |
1248 | * can clear the flag, and then another checks it before the mapping | |
1249 | * gets invalidated. Fix that by serializing access to this part of | |
1250 | * the function. | |
1251 | * | |
1252 | * At the same time, we need to allow other tasks to see whether we | |
1253 | * might be in the middle of invalidating the pages, so we only set | |
1254 | * the bit lock here if it looks like we're going to be doing that. | |
1255 | */ | |
1256 | for (;;) { | |
74316201 N |
1257 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1258 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1259 | if (ret) |
1260 | goto out; | |
17dfeb91 TM |
1261 | spin_lock(&inode->i_lock); |
1262 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1263 | spin_unlock(&inode->i_lock); | |
1264 | continue; | |
1265 | } | |
1266 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1267 | break; |
d529ef83 | 1268 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1269 | goto out; |
f4ce1299 TM |
1270 | } |
1271 | ||
17dfeb91 | 1272 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1273 | smp_wmb(); |
17dfeb91 TM |
1274 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1275 | spin_unlock(&inode->i_lock); | |
1276 | trace_nfs_invalidate_mapping_enter(inode); | |
be527494 | 1277 | ret = nfs_invalidate_mapping(inode, mapping); |
17dfeb91 TM |
1278 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1279 | ||
d529ef83 | 1280 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1281 | smp_mb__after_atomic(); |
d529ef83 | 1282 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1283 | out: |
44b11874 | 1284 | return ret; |
7d52e862 TM |
1285 | } |
1286 | ||
ca0daa27 | 1287 | static bool nfs_file_has_writers(struct nfs_inode *nfsi) |
874f9463 | 1288 | { |
ca0daa27 TM |
1289 | struct inode *inode = &nfsi->vfs_inode; |
1290 | ||
1291 | assert_spin_locked(&inode->i_lock); | |
1292 | ||
1293 | if (!S_ISREG(inode->i_mode)) | |
1294 | return false; | |
1295 | if (list_empty(&nfsi->open_files)) | |
1296 | return false; | |
1297 | /* Note: This relies on nfsi->open_files being ordered with writers | |
1298 | * being placed at the head of the list. | |
1299 | * See nfs_inode_attach_open_context() | |
1300 | */ | |
1301 | return (list_first_entry(&nfsi->open_files, | |
1302 | struct nfs_open_context, | |
1303 | list)->mode & FMODE_WRITE) == FMODE_WRITE; | |
874f9463 TM |
1304 | } |
1305 | ||
651b0e70 | 1306 | static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi) |
874f9463 | 1307 | { |
651b0e70 | 1308 | return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi); |
874f9463 TM |
1309 | } |
1310 | ||
27dc1cd3 | 1311 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 | 1312 | { |
27dc1cd3 | 1313 | unsigned long ret = 0; |
a895b4a1 | 1314 | |
9e6e70f8 TM |
1315 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1316 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
c472c07b | 1317 | && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) { |
1eb5d98f | 1318 | inode_set_iversion_raw(inode, fattr->change_attr); |
70ca8852 | 1319 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1320 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1321 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1322 | } |
a895b4a1 | 1323 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1324 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1325 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1326 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1327 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1328 | ret |= NFS_INO_INVALID_ATTR; | |
1329 | } | |
9e6e70f8 TM |
1330 | |
1331 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1332 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1333 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1334 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1335 | if (S_ISDIR(inode->i_mode)) | |
6edf9609 | 1336 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1337 | ret |= NFS_INO_INVALID_ATTR; |
a895b4a1 | 1338 | } |
9e6e70f8 TM |
1339 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1340 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1341 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
a6b6d5b8 | 1342 | && !nfs_have_writebacks(inode)) { |
27dc1cd3 TM |
1343 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
1344 | ret |= NFS_INO_INVALID_ATTR; | |
1345 | } | |
de242c0b | 1346 | |
27dc1cd3 | 1347 | return ret; |
a895b4a1 TM |
1348 | } |
1349 | ||
1da177e4 | 1350 | /** |
33801147 | 1351 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1352 | * @inode - pointer to inode |
1353 | * @fattr - updated attributes | |
1354 | * | |
1355 | * Verifies the attribute cache. If we have just changed the attributes, | |
1356 | * so that fattr carries weak cache consistency data, then it may | |
1357 | * also update the ctime/mtime/change_attribute. | |
1358 | */ | |
33801147 | 1359 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1360 | { |
1361 | struct nfs_inode *nfsi = NFS_I(inode); | |
1362 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1363 | unsigned long invalid = 0; |
1da177e4 | 1364 | |
dc59250c | 1365 | |
01da47bd TM |
1366 | if (nfs_have_delegated_attributes(inode)) |
1367 | return 0; | |
ca62b9c3 | 1368 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 | 1369 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
cc89684c | 1370 | return -ESTALE; |
9e6e70f8 | 1371 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
cc89684c | 1372 | return -ESTALE; |
ca62b9c3 | 1373 | |
651b0e70 | 1374 | if (!nfs_file_has_buffered_writers(nfsi)) { |
ca0daa27 | 1375 | /* Verify a few of the more important attributes */ |
c472c07b | 1376 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr)) |
ca0daa27 | 1377 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1378 | |
ca0daa27 TM |
1379 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
1380 | invalid |= NFS_INO_INVALID_ATTR; | |
ca62b9c3 | 1381 | |
ca0daa27 TM |
1382 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&inode->i_ctime, &fattr->ctime)) |
1383 | invalid |= NFS_INO_INVALID_ATTR; | |
1384 | ||
1385 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { | |
1386 | cur_size = i_size_read(inode); | |
1387 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1388 | if (cur_size != new_isize) | |
1389 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1390 | } | |
9e6e70f8 | 1391 | } |
1da177e4 LT |
1392 | |
1393 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1394 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1395 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1396 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1397 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1398 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1399 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1400 | |
1401 | /* Has the link count changed? */ | |
9e6e70f8 | 1402 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1403 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1404 | |
9e6e70f8 | 1405 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1406 | invalid |= NFS_INO_INVALID_ATIME; |
1407 | ||
1408 | if (invalid != 0) | |
1ad13dbc | 1409 | nfs_set_cache_invalid(inode, invalid | NFS_INO_REVAL_FORCED); |
1da177e4 | 1410 | |
33801147 | 1411 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1412 | return 0; |
1413 | } | |
1414 | ||
ae05f269 | 1415 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1416 | |
1417 | static unsigned long nfs_read_attr_generation_counter(void) | |
1418 | { | |
ae05f269 | 1419 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1420 | } |
1421 | ||
1422 | unsigned long nfs_inc_attr_generation_counter(void) | |
1423 | { | |
ae05f269 | 1424 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 | 1425 | } |
3235b403 | 1426 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
4704f0e2 TM |
1427 | |
1428 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1429 | { | |
1430 | fattr->valid = 0; | |
1431 | fattr->time_start = jiffies; | |
1432 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1433 | fattr->owner_name = NULL; |
1434 | fattr->group_name = NULL; | |
4704f0e2 | 1435 | } |
ddda8e0a | 1436 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1437 | |
140e049c TM |
1438 | /** |
1439 | * nfs_fattr_set_barrier | |
1440 | * @fattr: attributes | |
1441 | * | |
1442 | * Used to set a barrier after an attribute was updated. This | |
1443 | * barrier ensures that older attributes from RPC calls that may | |
1444 | * have raced with our update cannot clobber these new values. | |
1445 | * Note that you are still responsible for ensuring that other | |
1446 | * operations which change the attribute on the server do not | |
1447 | * collide. | |
1448 | */ | |
1449 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) | |
1450 | { | |
1451 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1452 | } | |
1453 | ||
2d36bfde TM |
1454 | struct nfs_fattr *nfs_alloc_fattr(void) |
1455 | { | |
1456 | struct nfs_fattr *fattr; | |
1457 | ||
1458 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1459 | if (fattr != NULL) | |
1460 | nfs_fattr_init(fattr); | |
1461 | return fattr; | |
1462 | } | |
ddda8e0a | 1463 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1464 | |
1465 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1466 | { | |
1467 | struct nfs_fh *fh; | |
1468 | ||
1469 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1470 | if (fh != NULL) | |
1471 | fh->size = 0; | |
1472 | return fh; | |
1473 | } | |
ddda8e0a | 1474 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1475 | |
e27d359e | 1476 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1477 | /* |
1478 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1479 | * in the same way that wireshark does | |
1480 | * | |
1481 | * @fh: file handle | |
1482 | * | |
1483 | * For debugging only. | |
1484 | */ | |
1485 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1486 | { | |
1487 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1488 | * not on the result */ | |
1264a2f0 | 1489 | return nfs_fhandle_hash(fh); |
d8e0539e | 1490 | } |
9e6ee76d | 1491 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1492 | |
1493 | /* | |
20d27e92 CL |
1494 | * _nfs_display_fhandle - display an NFS file handle on the console |
1495 | * | |
1496 | * @fh: file handle to display | |
1497 | * @caption: display caption | |
1498 | * | |
1499 | * For debugging only. | |
1500 | */ | |
20d27e92 CL |
1501 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1502 | { | |
1503 | unsigned short i; | |
1504 | ||
fa68a1ba | 1505 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1506 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1507 | return; | |
1508 | } | |
1509 | ||
d8e0539e WAA |
1510 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1511 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1512 | for (i = 0; i < fh->size; i += 16) { |
1513 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1514 | ||
1515 | switch ((fh->size - i - 1) >> 2) { | |
1516 | case 0: | |
1517 | printk(KERN_DEFAULT " %08x\n", | |
1518 | be32_to_cpup(pos)); | |
1519 | break; | |
1520 | case 1: | |
1521 | printk(KERN_DEFAULT " %08x %08x\n", | |
1522 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1523 | break; | |
1524 | case 2: | |
1525 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1526 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1527 | be32_to_cpup(pos + 2)); | |
1528 | break; | |
1529 | default: | |
1530 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1531 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1532 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1533 | } | |
1534 | } | |
1535 | } | |
9e6ee76d | 1536 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1537 | #endif |
1538 | ||
a10ad176 TM |
1539 | /** |
1540 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1541 | * @inode - pointer to inode | |
1542 | * @fattr - attributes | |
1543 | * | |
1544 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1545 | * attributes got scheduled after another call carrying updated ones. | |
1546 | * | |
1547 | * To do so, the function first assumes that a more recent ctime means | |
1548 | * that the attributes in fattr are newer, however it also attempt to | |
1549 | * catch the case where ctime either didn't change, or went backwards | |
1550 | * (if someone reset the clock on the server) by looking at whether | |
1551 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1552 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1553 | * |
1554 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1555 | * more recent than the ones cached in the inode. | |
1556 | * | |
1557 | */ | |
1558 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1559 | { | |
1560 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1561 | ||
4704f0e2 | 1562 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
4704f0e2 | 1563 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1564 | } |
1565 | ||
1566 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1567 | { | |
f4ce1299 TM |
1568 | int ret; |
1569 | ||
1570 | trace_nfs_refresh_inode_enter(inode); | |
1571 | ||
a10ad176 | 1572 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1573 | ret = nfs_update_inode(inode, fattr); |
1574 | else | |
1575 | ret = nfs_check_inode_attributes(inode, fattr); | |
1576 | ||
1577 | trace_nfs_refresh_inode_exit(inode, ret); | |
1578 | return ret; | |
870a5be8 TM |
1579 | } |
1580 | ||
33801147 TM |
1581 | /** |
1582 | * nfs_refresh_inode - try to update the inode attribute cache | |
1583 | * @inode - pointer to inode | |
1584 | * @fattr - updated attributes | |
1585 | * | |
1586 | * Check that an RPC call that returned attributes has not overlapped with | |
1587 | * other recent updates of the inode metadata, then decide whether it is | |
1588 | * safe to do a full update of the inode attributes, or whether just to | |
1589 | * call nfs_check_inode_attributes. | |
1590 | */ | |
1591 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1592 | { | |
33801147 TM |
1593 | int status; |
1594 | ||
1595 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1596 | return 0; | |
1597 | spin_lock(&inode->i_lock); | |
870a5be8 | 1598 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1599 | spin_unlock(&inode->i_lock); |
ef79c097 | 1600 | |
33801147 TM |
1601 | return status; |
1602 | } | |
ddda8e0a | 1603 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1604 | |
d65f557f TM |
1605 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1606 | { | |
ca0daa27 | 1607 | unsigned long invalid = NFS_INO_INVALID_ATTR; |
d65f557f | 1608 | |
6edf9609 TM |
1609 | if (S_ISDIR(inode->i_mode)) |
1610 | invalid |= NFS_INO_INVALID_DATA; | |
1611 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1612 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1613 | return 0; | |
1614 | return nfs_refresh_inode_locked(inode, fattr); | |
1615 | } | |
1616 | ||
decf491f TM |
1617 | /** |
1618 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1619 | * @inode - pointer to inode | |
1620 | * @fattr - updated attributes | |
1621 | * | |
1622 | * After an operation that has changed the inode metadata, mark the | |
1623 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1624 | * |
1625 | * NB: if the server didn't return any post op attributes, this | |
1626 | * function will force the retrieval of attributes before the next | |
1627 | * NFS request. Thus it should be used only for operations that | |
1628 | * are expected to change one or more attributes, to avoid | |
1629 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1630 | */ |
1631 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1632 | { | |
d65f557f | 1633 | int status; |
decf491f | 1634 | |
7668fdbe | 1635 | spin_lock(&inode->i_lock); |
92d64e47 | 1636 | nfs_fattr_set_barrier(fattr); |
d65f557f | 1637 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1638 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1639 | |
870a5be8 | 1640 | return status; |
decf491f | 1641 | } |
1c606fb7 | 1642 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1643 | |
70ca8852 | 1644 | /** |
a08a8cd3 | 1645 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
70ca8852 TM |
1646 | * @inode - pointer to inode |
1647 | * @fattr - updated attributes | |
1648 | * | |
1649 | * After an operation that has changed the inode metadata, mark the | |
1650 | * attribute cache as being invalid, then try to update it. Fake up | |
1651 | * weak cache consistency data, if none exist. | |
1652 | * | |
1653 | * This function is mainly designed to be used by the ->write_done() functions. | |
1654 | */ | |
a08a8cd3 | 1655 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
70ca8852 | 1656 | { |
d65f557f TM |
1657 | int status; |
1658 | ||
d65f557f TM |
1659 | /* Don't do a WCC update if these attributes are already stale */ |
1660 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1661 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1662 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1663 | | NFS_ATTR_FATTR_PRESIZE | |
1664 | | NFS_ATTR_FATTR_PREMTIME | |
1665 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1666 | goto out_noforce; |
1667 | } | |
9e6e70f8 TM |
1668 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1669 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
1eb5d98f | 1670 | fattr->pre_change_attr = inode_peek_iversion_raw(inode); |
9e6e70f8 | 1671 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1672 | } |
9e6e70f8 TM |
1673 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1674 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1675 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1676 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1677 | } | |
1678 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1679 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1680 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1681 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1682 | } | |
1683 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1684 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1685 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1686 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1687 | } |
d65f557f TM |
1688 | out_noforce: |
1689 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
a08a8cd3 TM |
1690 | return status; |
1691 | } | |
1692 | ||
1693 | /** | |
1694 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1695 | * @inode - pointer to inode | |
1696 | * @fattr - updated attributes | |
1697 | * | |
1698 | * After an operation that has changed the inode metadata, mark the | |
1699 | * attribute cache as being invalid, then try to update it. Fake up | |
1700 | * weak cache consistency data, if none exist. | |
1701 | * | |
1702 | * This function is mainly designed to be used by the ->write_done() functions. | |
1703 | */ | |
1704 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1705 | { | |
1706 | int status; | |
1707 | ||
1708 | spin_lock(&inode->i_lock); | |
8f8ba1d7 | 1709 | nfs_fattr_set_barrier(fattr); |
a08a8cd3 | 1710 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
d65f557f TM |
1711 | spin_unlock(&inode->i_lock); |
1712 | return status; | |
70ca8852 | 1713 | } |
ddda8e0a | 1714 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1715 | |
ea96d1ec AS |
1716 | |
1717 | static inline bool nfs_fileid_valid(struct nfs_inode *nfsi, | |
1718 | struct nfs_fattr *fattr) | |
1719 | { | |
1720 | bool ret1 = true, ret2 = true; | |
1721 | ||
1722 | if (fattr->valid & NFS_ATTR_FATTR_FILEID) | |
1723 | ret1 = (nfsi->fileid == fattr->fileid); | |
1724 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1725 | ret2 = (nfsi->fileid == fattr->mounted_on_fileid); | |
1726 | return ret1 || ret2; | |
1727 | } | |
1728 | ||
1da177e4 LT |
1729 | /* |
1730 | * Many nfs protocol calls return the new file attributes after | |
1731 | * an operation. Here we update the inode to reflect the state | |
1732 | * of the server's inode. | |
1733 | * | |
1734 | * This is a bit tricky because we have to make sure all dirty pages | |
1735 | * have been sent off to the server before calling invalidate_inode_pages. | |
1736 | * To make sure no other process adds more write requests while we try | |
1737 | * our best to flush them, we make them sleep during the attribute refresh. | |
1738 | * | |
1739 | * A very similar scenario holds for the dir cache. | |
1740 | */ | |
24aa1fe6 | 1741 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1742 | { |
8b4bdcf8 | 1743 | struct nfs_server *server; |
1da177e4 | 1744 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1745 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1746 | unsigned long invalid = 0; |
3e7d950a | 1747 | unsigned long now = jiffies; |
62ab460c | 1748 | unsigned long save_cache_validity; |
651b0e70 | 1749 | bool have_writers = nfs_file_has_buffered_writers(nfsi); |
944171cb | 1750 | bool cache_revalidated = true; |
1da177e4 | 1751 | |
1e8968c5 | 1752 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1753 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1754 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1755 | atomic_read(&inode->i_count), fattr->valid); |
1756 | ||
ea96d1ec | 1757 | if (!nfs_fileid_valid(nfsi, fattr)) { |
e73e6c9e MT |
1758 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
1759 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1760 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1761 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1762 | (long long)fattr->fileid); | |
1763 | goto out_err; | |
1764 | } | |
1da177e4 LT |
1765 | |
1766 | /* | |
1767 | * Make sure the inode's type hasn't changed. | |
1768 | */ | |
e73e6c9e MT |
1769 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1770 | /* | |
1771 | * Big trouble! The inode has become a different object. | |
1772 | */ | |
1e8968c5 | 1773 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1774 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1775 | goto out_err; | |
1776 | } | |
1da177e4 | 1777 | |
8b4bdcf8 | 1778 | server = NFS_SERVER(inode); |
a0356862 | 1779 | /* Update the fsid? */ |
9e6e70f8 | 1780 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1781 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1782 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1783 | server->fsid = fattr->fsid; |
1784 | ||
1da177e4 LT |
1785 | /* |
1786 | * Update the read time so we don't revalidate too often. | |
1787 | */ | |
33801147 | 1788 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1789 | |
62ab460c TM |
1790 | save_cache_validity = nfsi->cache_validity; |
1791 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1792 | | NFS_INO_INVALID_ATIME | |
1793 | | NFS_INO_REVAL_FORCED | |
1794 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1795 | |
a895b4a1 | 1796 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1797 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1798 | |
944171cb BC |
1799 | if (pnfs_layoutcommit_outstanding(inode)) { |
1800 | nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR; | |
1801 | cache_revalidated = false; | |
1802 | } | |
10b7e9ad | 1803 | |
47aabaa7 | 1804 | /* More cache consistency checks */ |
9e6e70f8 | 1805 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
c472c07b | 1806 | if (!inode_eq_iversion_raw(inode, fattr->change_attr)) { |
9e6e70f8 TM |
1807 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1808 | inode->i_sb->s_id, inode->i_ino); | |
38512aa9 | 1809 | /* Could it be a race with writeback? */ |
ca0daa27 | 1810 | if (!have_writers) { |
38512aa9 TM |
1811 | invalid |= NFS_INO_INVALID_ATTR |
1812 | | NFS_INO_INVALID_DATA | |
1813 | | NFS_INO_INVALID_ACCESS | |
1814 | | NFS_INO_INVALID_ACL; | |
1815 | if (S_ISDIR(inode->i_mode)) | |
1816 | nfs_force_lookup_revalidate(inode); | |
1817 | } | |
1eb5d98f | 1818 | inode_set_iversion_raw(inode, fattr->change_attr); |
9e6e70f8 | 1819 | } |
ade14a7d | 1820 | } else { |
43b6535e | 1821 | nfsi->cache_validity |= save_cache_validity; |
ade14a7d TM |
1822 | cache_revalidated = false; |
1823 | } | |
9e6e70f8 TM |
1824 | |
1825 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1826 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
ade14a7d | 1827 | } else if (server->caps & NFS_CAP_MTIME) { |
43b6535e TM |
1828 | nfsi->cache_validity |= save_cache_validity & |
1829 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1830 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1831 | cache_revalidated = false; |
1832 | } | |
62ab460c | 1833 | |
9e6e70f8 | 1834 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1835 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
ade14a7d | 1836 | } else if (server->caps & NFS_CAP_CTIME) { |
43b6535e TM |
1837 | nfsi->cache_validity |= save_cache_validity & |
1838 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1839 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1840 | cache_revalidated = false; |
1841 | } | |
47aabaa7 | 1842 | |
951a143b | 1843 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1844 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1845 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1846 | cur_isize = i_size_read(inode); | |
1847 | if (new_isize != cur_isize) { | |
1848 | /* Do we perhaps have any outstanding writes, or has | |
1849 | * the file grown beyond our last write? */ | |
a6b6d5b8 | 1850 | if (!nfs_have_writebacks(inode) || new_isize > cur_isize) { |
9e6e70f8 | 1851 | i_size_write(inode, new_isize); |
ca0daa27 TM |
1852 | if (!have_writers) |
1853 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
9e6e70f8 | 1854 | } |
60c16ea8 HJ |
1855 | dprintk("NFS: isize change on server for file %s/%ld " |
1856 | "(%Ld to %Ld)\n", | |
1857 | inode->i_sb->s_id, | |
1858 | inode->i_ino, | |
1859 | (long long)cur_isize, | |
1860 | (long long)new_isize); | |
1da177e4 | 1861 | } |
ade14a7d | 1862 | } else { |
43b6535e TM |
1863 | nfsi->cache_validity |= save_cache_validity & |
1864 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1865 | | NFS_INO_REVAL_PAGECACHE |
1866 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1867 | cache_revalidated = false; |
1868 | } | |
1da177e4 | 1869 | |
1da177e4 | 1870 | |
9e6e70f8 TM |
1871 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1872 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
ade14a7d | 1873 | else if (server->caps & NFS_CAP_ATIME) { |
43b6535e TM |
1874 | nfsi->cache_validity |= save_cache_validity & |
1875 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1876 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1877 | cache_revalidated = false; |
1878 | } | |
1da177e4 | 1879 | |
9e6e70f8 TM |
1880 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1881 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1882 | umode_t newmode = inode->i_mode & S_IFMT; |
1883 | newmode |= fattr->mode & S_IALLUGO; | |
1884 | inode->i_mode = newmode; | |
9e6e70f8 | 1885 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1886 | } |
ade14a7d | 1887 | } else if (server->caps & NFS_CAP_MODE) { |
43b6535e TM |
1888 | nfsi->cache_validity |= save_cache_validity & |
1889 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1890 | | NFS_INO_INVALID_ACCESS |
1891 | | NFS_INO_INVALID_ACL | |
1892 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1893 | cache_revalidated = false; |
1894 | } | |
62ab460c | 1895 | |
9e6e70f8 | 1896 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1897 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1898 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1899 | inode->i_uid = fattr->uid; | |
1900 | } | |
ade14a7d | 1901 | } else if (server->caps & NFS_CAP_OWNER) { |
43b6535e TM |
1902 | nfsi->cache_validity |= save_cache_validity & |
1903 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1904 | | NFS_INO_INVALID_ACCESS |
1905 | | NFS_INO_INVALID_ACL | |
1906 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1907 | cache_revalidated = false; |
1908 | } | |
62ab460c | 1909 | |
9e6e70f8 | 1910 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1911 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1912 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1913 | inode->i_gid = fattr->gid; | |
1914 | } | |
ade14a7d | 1915 | } else if (server->caps & NFS_CAP_OWNER_GROUP) { |
43b6535e TM |
1916 | nfsi->cache_validity |= save_cache_validity & |
1917 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1918 | | NFS_INO_INVALID_ACCESS |
1919 | | NFS_INO_INVALID_ACL | |
1920 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1921 | cache_revalidated = false; |
1922 | } | |
921615f1 | 1923 | |
9e6e70f8 TM |
1924 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1925 | if (inode->i_nlink != fattr->nlink) { | |
1926 | invalid |= NFS_INO_INVALID_ATTR; | |
1927 | if (S_ISDIR(inode->i_mode)) | |
1928 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1929 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1930 | } |
ade14a7d | 1931 | } else if (server->caps & NFS_CAP_NLINK) { |
43b6535e TM |
1932 | nfsi->cache_validity |= save_cache_validity & |
1933 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1934 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1935 | cache_revalidated = false; |
1936 | } | |
1da177e4 | 1937 | |
9e6e70f8 | 1938 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1939 | /* |
1940 | * report the blocks in 512byte units | |
1941 | */ | |
1942 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
ade14a7d | 1943 | } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
9e6e70f8 | 1944 | inode->i_blocks = fattr->du.nfs2.blocks; |
ade14a7d TM |
1945 | else |
1946 | cache_revalidated = false; | |
1da177e4 LT |
1947 | |
1948 | /* Update attrtimeo value if we're out of the unstable period */ | |
fd1defc2 | 1949 | if (invalid & NFS_INO_INVALID_ATTR) { |
91d5b470 | 1950 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1951 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1952 | nfsi->attrtimeo_timestamp = now; |
f5062003 | 1953 | /* Set barrier to be more recent than all outstanding updates */ |
4704f0e2 | 1954 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1955 | } else { |
ade14a7d TM |
1956 | if (cache_revalidated) { |
1957 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, | |
1958 | nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { | |
1959 | nfsi->attrtimeo <<= 1; | |
1960 | if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode)) | |
1961 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1962 | } | |
6d2b2966 TM |
1963 | nfsi->attrtimeo_timestamp = now; |
1964 | } | |
f5062003 TM |
1965 | /* Set the barrier to be more recent than this fattr */ |
1966 | if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) | |
1967 | nfsi->attr_gencount = fattr->gencount; | |
1da177e4 | 1968 | } |
c812012f JL |
1969 | |
1970 | /* Don't declare attrcache up to date if there were no attrs! */ | |
ade14a7d | 1971 | if (cache_revalidated) |
c812012f JL |
1972 | invalid &= ~NFS_INO_INVALID_ATTR; |
1973 | ||
1da177e4 LT |
1974 | /* Don't invalidate the data if we were to blame */ |
1975 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1976 | || S_ISLNK(inode->i_mode))) | |
1977 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1978 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1979 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
6edf9609 | 1980 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 1981 | |
1da177e4 | 1982 | return 0; |
b37b03b7 | 1983 | out_err: |
1da177e4 LT |
1984 | /* |
1985 | * No need to worry about unhashing the dentry, as the | |
1986 | * lookup validation will know that the inode is bad. | |
1987 | * (But we fall through to invalidate the caches.) | |
1988 | */ | |
1989 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1990 | return -ESTALE; |
1991 | } | |
1992 | ||
f7b422b1 | 1993 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1994 | { |
1995 | struct nfs_inode *nfsi; | |
c456aacf | 1996 | nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1997 | if (!nfsi) |
1998 | return NULL; | |
55296809 CL |
1999 | nfsi->flags = 0UL; |
2000 | nfsi->cache_validity = 0UL; | |
89d77c8f | 2001 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
2002 | nfsi->nfs4_acl = NULL; |
2003 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
2004 | return &nfsi->vfs_inode; |
2005 | } | |
89d77c8f | 2006 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 2007 | |
fa0d7e3d | 2008 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 2009 | { |
fa0d7e3d | 2010 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
2011 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
2012 | } | |
2013 | ||
fa0d7e3d NP |
2014 | void nfs_destroy_inode(struct inode *inode) |
2015 | { | |
2016 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
2017 | } | |
89d77c8f | 2018 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 2019 | |
d75d5414 AM |
2020 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
2021 | { | |
89d77c8f | 2022 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
2023 | INIT_LIST_HEAD(&nfsi->open_states); |
2024 | nfsi->delegation = NULL; | |
d75d5414 | 2025 | init_rwsem(&nfsi->rwsem); |
e5e94017 | 2026 | nfsi->layout = NULL; |
d75d5414 AM |
2027 | #endif |
2028 | } | |
f7b422b1 | 2029 | |
51cc5068 | 2030 | static void init_once(void *foo) |
1da177e4 LT |
2031 | { |
2032 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
2033 | ||
a35afb83 | 2034 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
2035 | INIT_LIST_HEAD(&nfsi->open_files); |
2036 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
2037 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 2038 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a6b6d5b8 | 2039 | atomic_long_set(&nfsi->nrequests, 0); |
5cb953d4 | 2040 | atomic_long_set(&nfsi->commit_info.ncommit, 0); |
1a0de48a | 2041 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
884be175 | 2042 | init_rwsem(&nfsi->rmdir_sem); |
e824f99a | 2043 | mutex_init(&nfsi->commit_mutex); |
a35afb83 | 2044 | nfs4_init_once(nfsi); |
1da177e4 | 2045 | } |
20c2df83 | 2046 | |
f7b422b1 | 2047 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
2048 | { |
2049 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
2050 | sizeof(struct nfs_inode), | |
fffb60f9 | 2051 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 2052 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 2053 | init_once); |
1da177e4 LT |
2054 | if (nfs_inode_cachep == NULL) |
2055 | return -ENOMEM; | |
2056 | ||
2057 | return 0; | |
2058 | } | |
2059 | ||
266bee88 | 2060 | static void nfs_destroy_inodecache(void) |
1da177e4 | 2061 | { |
8c0a8537 KS |
2062 | /* |
2063 | * Make sure all delayed rcu free inodes are flushed before we | |
2064 | * destroy cache. | |
2065 | */ | |
2066 | rcu_barrier(); | |
1a1d92c1 | 2067 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
2068 | } |
2069 | ||
5746006f | 2070 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 2071 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
2072 | |
2073 | /* | |
2074 | * start up the nfsiod workqueue | |
2075 | */ | |
2076 | static int nfsiod_start(void) | |
2077 | { | |
2078 | struct workqueue_struct *wq; | |
2079 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 2080 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
2081 | if (wq == NULL) |
2082 | return -ENOMEM; | |
2083 | nfsiod_workqueue = wq; | |
2084 | return 0; | |
2085 | } | |
2086 | ||
2087 | /* | |
2088 | * Destroy the nfsiod workqueue | |
2089 | */ | |
2090 | static void nfsiod_stop(void) | |
2091 | { | |
2092 | struct workqueue_struct *wq; | |
2093 | ||
2094 | wq = nfsiod_workqueue; | |
2095 | if (wq == NULL) | |
2096 | return; | |
2097 | nfsiod_workqueue = NULL; | |
2098 | destroy_workqueue(wq); | |
2099 | } | |
2100 | ||
c7d03a00 | 2101 | unsigned int nfs_net_id; |
9e2e74db | 2102 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
2103 | |
2104 | static int nfs_net_init(struct net *net) | |
2105 | { | |
6b13168b | 2106 | nfs_clients_init(net); |
65b38851 | 2107 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
2108 | } |
2109 | ||
2110 | static void nfs_net_exit(struct net *net) | |
2111 | { | |
b0b5352d VA |
2112 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
2113 | ||
65b38851 | 2114 | nfs_fs_proc_net_exit(net); |
28cd1b3f | 2115 | nfs_cleanup_cb_ident_idr(net); |
b0b5352d VA |
2116 | WARN_ON_ONCE(!list_empty(&nn->nfs_client_list)); |
2117 | WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list)); | |
1b340d01 SK |
2118 | } |
2119 | ||
2120 | static struct pernet_operations nfs_net_ops = { | |
2121 | .init = nfs_net_init, | |
2122 | .exit = nfs_net_exit, | |
2123 | .id = &nfs_net_id, | |
2124 | .size = sizeof(struct nfs_net), | |
2125 | }; | |
2126 | ||
1da177e4 LT |
2127 | /* |
2128 | * Initialize NFS | |
2129 | */ | |
2130 | static int __init init_nfs_fs(void) | |
2131 | { | |
2132 | int err; | |
2133 | ||
1b340d01 | 2134 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 2135 | if (err < 0) |
89d77c8f | 2136 | goto out9; |
e571cbf1 | 2137 | |
8ec442ae DH |
2138 | err = nfs_fscache_register(); |
2139 | if (err < 0) | |
89d77c8f | 2140 | goto out8; |
8ec442ae | 2141 | |
5746006f TM |
2142 | err = nfsiod_start(); |
2143 | if (err) | |
89d77c8f | 2144 | goto out7; |
5746006f | 2145 | |
6aaca566 DH |
2146 | err = nfs_fs_proc_init(); |
2147 | if (err) | |
89d77c8f | 2148 | goto out6; |
6aaca566 | 2149 | |
1da177e4 LT |
2150 | err = nfs_init_nfspagecache(); |
2151 | if (err) | |
89d77c8f | 2152 | goto out5; |
1da177e4 LT |
2153 | |
2154 | err = nfs_init_inodecache(); | |
2155 | if (err) | |
89d77c8f | 2156 | goto out4; |
1da177e4 LT |
2157 | |
2158 | err = nfs_init_readpagecache(); | |
2159 | if (err) | |
89d77c8f | 2160 | goto out3; |
1da177e4 LT |
2161 | |
2162 | err = nfs_init_writepagecache(); | |
2163 | if (err) | |
89d77c8f | 2164 | goto out2; |
1da177e4 | 2165 | |
1da177e4 LT |
2166 | err = nfs_init_directcache(); |
2167 | if (err) | |
89d77c8f | 2168 | goto out1; |
1da177e4 | 2169 | |
ec7652aa | 2170 | rpc_proc_register(&init_net, &nfs_rpcstat); |
cd738ee9 KM |
2171 | |
2172 | err = register_nfs_fs(); | |
2173 | if (err) | |
129d1977 BS |
2174 | goto out0; |
2175 | ||
1da177e4 | 2176 | return 0; |
129d1977 | 2177 | out0: |
ec7652aa | 2178 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2179 | nfs_destroy_directcache(); |
89d77c8f | 2180 | out1: |
129d1977 | 2181 | nfs_destroy_writepagecache(); |
89d77c8f | 2182 | out2: |
129d1977 | 2183 | nfs_destroy_readpagecache(); |
89d77c8f | 2184 | out3: |
129d1977 | 2185 | nfs_destroy_inodecache(); |
89d77c8f | 2186 | out4: |
129d1977 | 2187 | nfs_destroy_nfspagecache(); |
89d77c8f | 2188 | out5: |
129d1977 | 2189 | nfs_fs_proc_exit(); |
89d77c8f | 2190 | out6: |
129d1977 | 2191 | nfsiod_stop(); |
89d77c8f | 2192 | out7: |
129d1977 | 2193 | nfs_fscache_unregister(); |
89d77c8f | 2194 | out8: |
129d1977 | 2195 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 2196 | out9: |
1da177e4 LT |
2197 | return err; |
2198 | } | |
2199 | ||
2200 | static void __exit exit_nfs_fs(void) | |
2201 | { | |
1da177e4 | 2202 | nfs_destroy_directcache(); |
1da177e4 LT |
2203 | nfs_destroy_writepagecache(); |
2204 | nfs_destroy_readpagecache(); | |
2205 | nfs_destroy_inodecache(); | |
2206 | nfs_destroy_nfspagecache(); | |
8ec442ae | 2207 | nfs_fscache_unregister(); |
1b340d01 | 2208 | unregister_pernet_subsys(&nfs_net_ops); |
ec7652aa | 2209 | rpc_proc_unregister(&init_net, "nfs"); |
f7b422b1 | 2210 | unregister_nfs_fs(); |
6aaca566 | 2211 | nfs_fs_proc_exit(); |
5746006f | 2212 | nfsiod_stop(); |
1da177e4 LT |
2213 | } |
2214 | ||
2215 | /* Not quite true; I just maintain it */ | |
2216 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2217 | MODULE_LICENSE("GPL"); | |
f43bf0be | 2218 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
2219 | |
2220 | module_init(init_nfs_fs) | |
2221 | module_exit(exit_nfs_fs) |