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Commit | Line | Data |
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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> |
1da177e4 | 41 | |
7c0f6ba6 | 42 | #include <linux/uaccess.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 | |
210c7c17 BC |
88 | int nfs_wait_atomic_killable(atomic_t *p) |
89 | { | |
90 | return nfs_wait_killable(TASK_KILLABLE); | |
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 | |
1da177e4 LT |
389 | /* |
390 | * This is our front-end to iget that looks up inodes by file handle | |
391 | * instead of inode number. | |
392 | */ | |
393 | struct inode * | |
1775fd3e | 394 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
395 | { |
396 | struct nfs_find_desc desc = { | |
397 | .fh = fh, | |
398 | .fattr = fattr | |
399 | }; | |
03f28e3a | 400 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
401 | unsigned long hash; |
402 | ||
7ebb9315 BS |
403 | nfs_attr_check_mountpoint(sb, fattr); |
404 | ||
2ef47eb1 AS |
405 | if (nfs_attr_use_mounted_on_fileid(fattr)) |
406 | fattr->fileid = fattr->mounted_on_fileid; | |
407 | else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) | |
1da177e4 | 408 | goto out_no_inode; |
9e6e70f8 | 409 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 410 | goto out_no_inode; |
1da177e4 LT |
411 | |
412 | hash = nfs_fattr_to_ino_t(fattr); | |
413 | ||
03f28e3a TM |
414 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
415 | if (inode == NULL) { | |
416 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 417 | goto out_no_inode; |
03f28e3a | 418 | } |
1da177e4 LT |
419 | |
420 | if (inode->i_state & I_NEW) { | |
421 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 422 | unsigned long now = jiffies; |
1da177e4 LT |
423 | |
424 | /* We set i_ino for the few things that still rely on it, | |
425 | * such as stat(2) */ | |
426 | inode->i_ino = hash; | |
427 | ||
428 | /* We can't support update_atime(), since the server will reset it */ | |
429 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
430 | inode->i_mode = fattr->mode; | |
62ab460c TM |
431 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
432 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
6edf9609 | 433 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
1da177e4 LT |
434 | /* Why so? Because we want revalidate for devices/FIFOs, and |
435 | * that's precisely what we have in nfs_file_inode_operations. | |
436 | */ | |
8fa5c000 | 437 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 438 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 439 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 | 440 | inode->i_data.a_ops = &nfs_file_aops; |
1da177e4 | 441 | } else if (S_ISDIR(inode->i_mode)) { |
8fa5c000 | 442 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 443 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 444 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 445 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
446 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
447 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
448 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
449 | inode->i_op = &nfs_referral_inode_operations; | |
450 | else | |
451 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 452 | inode->i_fop = NULL; |
36d43a43 | 453 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 454 | } |
21fc61c7 | 455 | } else if (S_ISLNK(inode->i_mode)) { |
1da177e4 | 456 | inode->i_op = &nfs_symlink_inode_operations; |
21fc61c7 AV |
457 | inode_nohighmem(inode); |
458 | } else | |
1da177e4 LT |
459 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
460 | ||
9e6e70f8 TM |
461 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
462 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
463 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 464 | inode->i_version = 0; |
9e6e70f8 | 465 | inode->i_size = 0; |
6d6b77f1 | 466 | clear_nlink(inode); |
9ff593c4 EB |
467 | inode->i_uid = make_kuid(&init_user_ns, -2); |
468 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
469 | inode->i_blocks = 0; |
470 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
471 | nfsi->write_io = 0; |
472 | nfsi->read_io = 0; | |
9e6e70f8 | 473 | |
33801147 | 474 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 475 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
476 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
477 | inode->i_atime = fattr->atime; | |
62ab460c | 478 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
6edf9609 | 479 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
480 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
481 | inode->i_mtime = fattr->mtime; | |
62ab460c | 482 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
6edf9609 | 483 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
484 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
485 | inode->i_ctime = fattr->ctime; | |
62ab460c | 486 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
6edf9609 | 487 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 | 488 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 489 | inode->i_version = fattr->change_attr; |
cd812599 | 490 | else |
5c675d64 TM |
491 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
492 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 TM |
493 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
494 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 495 | else |
6edf9609 TM |
496 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
497 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 | 498 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 499 | set_nlink(inode, fattr->nlink); |
62ab460c | 500 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
6edf9609 | 501 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
502 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
503 | inode->i_uid = fattr->uid; | |
62ab460c | 504 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
6edf9609 | 505 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
506 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
507 | inode->i_gid = fattr->gid; | |
62ab460c | 508 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
6edf9609 | 509 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
510 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
511 | inode->i_blocks = fattr->du.nfs2.blocks; | |
512 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
513 | /* |
514 | * report the blocks in 512byte units | |
515 | */ | |
516 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 517 | } |
aa9c2669 DQ |
518 | |
519 | nfs_setsecurity(inode, fattr, label); | |
520 | ||
1da177e4 | 521 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 522 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 523 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 524 | |
f1fe29b4 | 525 | nfs_fscache_init_inode(inode); |
ef79c097 | 526 | |
1da177e4 LT |
527 | unlock_new_inode(inode); |
528 | } else | |
529 | nfs_refresh_inode(inode, fattr); | |
1e8968c5 | 530 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 531 | inode->i_sb->s_id, |
1e8968c5 | 532 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 533 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
534 | atomic_read(&inode->i_count)); |
535 | ||
536 | out: | |
537 | return inode; | |
538 | ||
539 | out_no_inode: | |
03f28e3a | 540 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
541 | goto out; |
542 | } | |
89d77c8f | 543 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 544 | |
536e43d1 | 545 | #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 |
546 | |
547 | int | |
548 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
549 | { | |
2b0143b5 | 550 | struct inode *inode = d_inode(dentry); |
987f8dfc | 551 | struct nfs_fattr *fattr; |
ae57ca0f | 552 | int error = 0; |
1da177e4 | 553 | |
91d5b470 CL |
554 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
555 | ||
188b95dd JL |
556 | /* skip mode change if it's just for clearing setuid/setgid */ |
557 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
558 | attr->ia_valid &= ~ATTR_MODE; | |
559 | ||
1da177e4 | 560 | if (attr->ia_valid & ATTR_SIZE) { |
08a899d5 CH |
561 | BUG_ON(!S_ISREG(inode->i_mode)); |
562 | ||
ae57ca0f KM |
563 | error = inode_newsize_ok(inode, attr->ia_size); |
564 | if (error) | |
565 | return error; | |
566 | ||
567 | if (attr->ia_size == i_size_read(inode)) | |
1da177e4 LT |
568 | attr->ia_valid &= ~ATTR_SIZE; |
569 | } | |
570 | ||
571 | /* Optimization: if the end result is no change, don't RPC */ | |
572 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 573 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
574 | return 0; |
575 | ||
f4ce1299 TM |
576 | trace_nfs_setattr_enter(inode); |
577 | ||
755c1e20 | 578 | /* Write all dirty data */ |
4d346bea TM |
579 | if (S_ISREG(inode->i_mode)) |
580 | nfs_sync_inode(inode); | |
987f8dfc TM |
581 | |
582 | fattr = nfs_alloc_fattr(); | |
ae57ca0f KM |
583 | if (fattr == NULL) { |
584 | error = -ENOMEM; | |
987f8dfc | 585 | goto out; |
ae57ca0f KM |
586 | } |
587 | ||
642ac549 TM |
588 | /* |
589 | * Return any delegations if we're going to change ACLs | |
590 | */ | |
591 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 592 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 593 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 594 | if (error == 0) |
aa9c2669 | 595 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
596 | nfs_free_fattr(fattr); |
597 | out: | |
f4ce1299 | 598 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
599 | return error; |
600 | } | |
ddda8e0a | 601 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 602 | |
a3d01454 TM |
603 | /** |
604 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
605 | * @inode: inode of the file used | |
606 | * @offset: file offset to start truncating | |
607 | * | |
608 | * This is a copy of the common vmtruncate, but with the locking | |
609 | * corrected to take into account the fact that NFS requires | |
610 | * inode->i_size to be updated under the inode->i_lock. | |
f044636d | 611 | * Note: must be called with inode->i_lock held! |
a3d01454 TM |
612 | */ |
613 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
614 | { | |
c08d3b0e | 615 | int err; |
a3d01454 | 616 | |
c08d3b0e | 617 | err = inode_newsize_ok(inode, offset); |
618 | if (err) | |
619 | goto out; | |
a3d01454 | 620 | |
c08d3b0e | 621 | i_size_write(inode, offset); |
6edf9609 TM |
622 | /* Optimisation */ |
623 | if (offset == 0) | |
624 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA; | |
c08d3b0e | 625 | |
f044636d | 626 | spin_unlock(&inode->i_lock); |
7caef267 | 627 | truncate_pagecache(inode, offset); |
f044636d | 628 | spin_lock(&inode->i_lock); |
c08d3b0e | 629 | out: |
630 | return err; | |
a3d01454 TM |
631 | } |
632 | ||
65e4308d TM |
633 | /** |
634 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
635 | * @inode: pointer to struct inode | |
636 | * @attr: pointer to struct iattr | |
637 | * | |
638 | * Note: we do this in the *proc.c in order to ensure that | |
639 | * it works for things like exclusive creates too. | |
640 | */ | |
f044636d TM |
641 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, |
642 | struct nfs_fattr *fattr) | |
65e4308d | 643 | { |
f044636d TM |
644 | /* Barrier: bump the attribute generation count. */ |
645 | nfs_fattr_set_barrier(fattr); | |
646 | ||
647 | spin_lock(&inode->i_lock); | |
648 | NFS_I(inode)->attr_gencount = fattr->gencount; | |
65e4308d | 649 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
1da177e4 | 650 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
651 | int mode = attr->ia_mode & S_IALLUGO; |
652 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
653 | inode->i_mode = mode; |
654 | } | |
655 | if ((attr->ia_valid & ATTR_UID) != 0) | |
656 | inode->i_uid = attr->ia_uid; | |
657 | if ((attr->ia_valid & ATTR_GID) != 0) | |
658 | inode->i_gid = attr->ia_gid; | |
6edf9609 TM |
659 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
660 | | NFS_INO_INVALID_ACL); | |
65e4308d TM |
661 | } |
662 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 663 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 664 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 665 | } |
616c3196 JL |
666 | if (fattr->valid) |
667 | nfs_update_inode(inode, fattr); | |
668 | else | |
669 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; | |
f044636d | 670 | spin_unlock(&inode->i_lock); |
1da177e4 | 671 | } |
ddda8e0a | 672 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 673 | |
1bcf4c5c | 674 | static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry) |
311324ad TM |
675 | { |
676 | struct dentry *parent; | |
677 | ||
1bcf4c5c TM |
678 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) |
679 | return; | |
311324ad | 680 | parent = dget_parent(dentry); |
2b0143b5 | 681 | nfs_force_use_readdirplus(d_inode(parent)); |
311324ad TM |
682 | dput(parent); |
683 | } | |
684 | ||
1bcf4c5c TM |
685 | static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry) |
686 | { | |
687 | struct dentry *parent; | |
688 | ||
689 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) | |
690 | return; | |
691 | parent = dget_parent(dentry); | |
692 | nfs_advise_use_readdirplus(d_inode(parent)); | |
693 | dput(parent); | |
694 | } | |
695 | ||
311324ad TM |
696 | static bool nfs_need_revalidate_inode(struct inode *inode) |
697 | { | |
698 | if (NFS_I(inode)->cache_validity & | |
699 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
700 | return true; | |
701 | if (nfs_attribute_cache_expired(inode)) | |
702 | return true; | |
703 | return false; | |
704 | } | |
705 | ||
a528d35e DH |
706 | int nfs_getattr(const struct path *path, struct kstat *stat, |
707 | u32 request_mask, unsigned int query_flags) | |
1da177e4 | 708 | { |
a528d35e | 709 | struct inode *inode = d_inode(path->dentry); |
55296809 | 710 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
16caf5b6 | 711 | int err = 0; |
1da177e4 | 712 | |
f4ce1299 | 713 | trace_nfs_getattr_enter(inode); |
acdc53b2 | 714 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 715 | if (S_ISREG(inode->i_mode)) { |
79566ef0 | 716 | err = filemap_write_and_wait(inode->i_mapping); |
acdc53b2 TM |
717 | if (err) |
718 | goto out; | |
28c494c5 | 719 | } |
fc33a7bb CH |
720 | |
721 | /* | |
722 | * We may force a getattr if the user cares about atime. | |
723 | * | |
724 | * Note that we only have to check the vfsmount flags here: | |
725 | * - NFS always sets S_NOATIME by so checking it would give a | |
726 | * bogus result | |
727 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
728 | * no point in checking those. | |
729 | */ | |
a528d35e DH |
730 | if ((path->mnt->mnt_flags & MNT_NOATIME) || |
731 | ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 732 | need_atime = 0; |
fc33a7bb | 733 | |
311324ad TM |
734 | if (need_atime || nfs_need_revalidate_inode(inode)) { |
735 | struct nfs_server *server = NFS_SERVER(inode); | |
736 | ||
a528d35e | 737 | nfs_readdirplus_parent_cache_miss(path->dentry); |
311324ad | 738 | err = __nfs_revalidate_inode(server, inode); |
1bcf4c5c | 739 | } else |
a528d35e | 740 | nfs_readdirplus_parent_cache_hit(path->dentry); |
4e769b93 | 741 | if (!err) { |
1da177e4 | 742 | generic_fillattr(inode, stat); |
f43bf0be | 743 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
7ef5ca4f N |
744 | if (S_ISDIR(inode->i_mode)) |
745 | stat->blksize = NFS_SERVER(inode)->dtsize; | |
4e769b93 | 746 | } |
acdc53b2 | 747 | out: |
f4ce1299 | 748 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
749 | return err; |
750 | } | |
ddda8e0a | 751 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 752 | |
f11ac8db TM |
753 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
754 | { | |
755 | atomic_set(&l_ctx->count, 1); | |
d51fdb87 | 756 | l_ctx->lockowner = current->files; |
f11ac8db | 757 | INIT_LIST_HEAD(&l_ctx->list); |
210c7c17 | 758 | atomic_set(&l_ctx->io_count, 0); |
f11ac8db TM |
759 | } |
760 | ||
761 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
762 | { | |
8c86899f TM |
763 | struct nfs_lock_context *head = &ctx->lock_context; |
764 | struct nfs_lock_context *pos = head; | |
f11ac8db | 765 | |
8c86899f | 766 | do { |
d51fdb87 | 767 | if (pos->lockowner != current->files) |
f11ac8db TM |
768 | continue; |
769 | atomic_inc(&pos->count); | |
770 | return pos; | |
8c86899f | 771 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
772 | return NULL; |
773 | } | |
774 | ||
775 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
776 | { | |
777 | struct nfs_lock_context *res, *new = NULL; | |
2b0143b5 | 778 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db TM |
779 | |
780 | spin_lock(&inode->i_lock); | |
781 | res = __nfs_find_lock_context(ctx); | |
782 | if (res == NULL) { | |
783 | spin_unlock(&inode->i_lock); | |
784 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
785 | if (new == NULL) | |
b3c54de6 | 786 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
787 | nfs_init_lock_context(new); |
788 | spin_lock(&inode->i_lock); | |
789 | res = __nfs_find_lock_context(ctx); | |
790 | if (res == NULL) { | |
791 | list_add_tail(&new->list, &ctx->lock_context.list); | |
792 | new->open_context = ctx; | |
793 | res = new; | |
794 | new = NULL; | |
795 | } | |
796 | } | |
797 | spin_unlock(&inode->i_lock); | |
798 | kfree(new); | |
799 | return res; | |
800 | } | |
1c6dcbe5 | 801 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
802 | |
803 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
804 | { | |
805 | struct nfs_open_context *ctx = l_ctx->open_context; | |
2b0143b5 | 806 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db TM |
807 | |
808 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
809 | return; | |
810 | list_del(&l_ctx->list); | |
811 | spin_unlock(&inode->i_lock); | |
812 | kfree(l_ctx); | |
813 | } | |
1c6dcbe5 | 814 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 815 | |
7fe5c398 TM |
816 | /** |
817 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
818 | * @ctx: pointer to context | |
819 | * @is_sync: is this a synchronous close | |
820 | * | |
5cf9d706 TM |
821 | * Ensure that the attributes are up to date if we're mounted |
822 | * with close-to-open semantics and we have cached data that will | |
823 | * need to be revalidated on open. | |
7fe5c398 TM |
824 | */ |
825 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
826 | { | |
5cf9d706 | 827 | struct nfs_inode *nfsi; |
7fe5c398 TM |
828 | struct inode *inode; |
829 | struct nfs_server *server; | |
830 | ||
831 | if (!(ctx->mode & FMODE_WRITE)) | |
832 | return; | |
833 | if (!is_sync) | |
834 | return; | |
2b0143b5 | 835 | inode = d_inode(ctx->dentry); |
58ff4184 TM |
836 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
837 | return; | |
5cf9d706 TM |
838 | nfsi = NFS_I(inode); |
839 | if (inode->i_mapping->nrpages == 0) | |
840 | return; | |
841 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
842 | return; | |
843 | if (!list_empty(&nfsi->open_files)) | |
7fe5c398 TM |
844 | return; |
845 | server = NFS_SERVER(inode); | |
846 | if (server->flags & NFS_MOUNT_NOCTO) | |
847 | return; | |
848 | nfs_revalidate_inode(server, inode); | |
849 | } | |
ddda8e0a | 850 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 851 | |
532d4def N |
852 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, |
853 | fmode_t f_mode, | |
854 | struct file *filp) | |
1da177e4 LT |
855 | { |
856 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
857 | struct rpc_cred *cred = rpc_lookup_cred(); |
858 | if (IS_ERR(cred)) | |
859 | return ERR_CAST(cred); | |
1da177e4 | 860 | |
f52720ca | 861 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
862 | if (!ctx) { |
863 | put_rpccred(cred); | |
864 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 865 | } |
5ede7b1c AV |
866 | nfs_sb_active(dentry->d_sb); |
867 | ctx->dentry = dget(dentry); | |
868 | ctx->cred = cred; | |
869 | ctx->state = NULL; | |
870 | ctx->mode = f_mode; | |
871 | ctx->flags = 0; | |
872 | ctx->error = 0; | |
532d4def | 873 | ctx->flock_owner = (fl_owner_t)filp; |
5ede7b1c AV |
874 | nfs_init_lock_context(&ctx->lock_context); |
875 | ctx->lock_context.open_context = ctx; | |
876 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 877 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
878 | return ctx; |
879 | } | |
89d77c8f | 880 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
881 | |
882 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
883 | { | |
884 | if (ctx != NULL) | |
f11ac8db | 885 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
886 | return ctx; |
887 | } | |
89d77c8f | 888 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 889 | |
7fe5c398 | 890 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 891 | { |
2b0143b5 | 892 | struct inode *inode = d_inode(ctx->dentry); |
3d4ff43d | 893 | struct super_block *sb = ctx->dentry->d_sb; |
3bec63db | 894 | |
5c78f58e | 895 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
896 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
897 | return; | |
898 | list_del(&ctx->list); | |
899 | spin_unlock(&inode->i_lock); | |
ef84303e | 900 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 901 | return; |
5c78f58e TM |
902 | if (inode != NULL) |
903 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
904 | if (ctx->cred != NULL) |
905 | put_rpccred(ctx->cred); | |
3d4ff43d | 906 | dput(ctx->dentry); |
322b2b90 | 907 | nfs_sb_deactive(sb); |
82be417a | 908 | kfree(ctx->mdsthreshold); |
3bec63db TM |
909 | kfree(ctx); |
910 | } | |
911 | ||
a49c3c77 TM |
912 | void put_nfs_open_context(struct nfs_open_context *ctx) |
913 | { | |
914 | __put_nfs_open_context(ctx, 0); | |
915 | } | |
89d77c8f | 916 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 917 | |
4eae5014 TM |
918 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
919 | { | |
920 | __put_nfs_open_context(ctx, 1); | |
921 | } | |
922 | ||
1da177e4 LT |
923 | /* |
924 | * Ensure that mmap has a recent RPC credential for use when writing out | |
925 | * shared pages | |
926 | */ | |
c45ffdd2 | 927 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 928 | { |
2b0143b5 | 929 | struct inode *inode = d_inode(ctx->dentry); |
1da177e4 LT |
930 | struct nfs_inode *nfsi = NFS_I(inode); |
931 | ||
1da177e4 | 932 | spin_lock(&inode->i_lock); |
ca0daa27 TM |
933 | if (ctx->mode & FMODE_WRITE) |
934 | list_add(&ctx->list, &nfsi->open_files); | |
935 | else | |
936 | list_add_tail(&ctx->list, &nfsi->open_files); | |
1da177e4 LT |
937 | spin_unlock(&inode->i_lock); |
938 | } | |
c45ffdd2 TM |
939 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
940 | ||
941 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
942 | { | |
943 | filp->private_data = get_nfs_open_context(ctx); | |
944 | if (list_empty(&ctx->list)) | |
945 | nfs_inode_attach_open_context(ctx); | |
946 | } | |
89d77c8f | 947 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 948 | |
d530838b TM |
949 | /* |
950 | * Given an inode, search for an open context with the desired characteristics | |
951 | */ | |
dc0b027d | 952 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
953 | { |
954 | struct nfs_inode *nfsi = NFS_I(inode); | |
955 | struct nfs_open_context *pos, *ctx = NULL; | |
956 | ||
957 | spin_lock(&inode->i_lock); | |
958 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
959 | if (cred != NULL && pos->cred != cred) |
960 | continue; | |
1544fa0f TM |
961 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
962 | continue; | |
963 | ctx = get_nfs_open_context(pos); | |
964 | break; | |
1da177e4 LT |
965 | } |
966 | spin_unlock(&inode->i_lock); | |
967 | return ctx; | |
968 | } | |
969 | ||
aff8d8dc | 970 | void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 971 | { |
cd3758e3 | 972 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
973 | |
974 | if (ctx) { | |
2b0143b5 | 975 | struct inode *inode = d_inode(ctx->dentry); |
c45ffdd2 | 976 | |
0bcbf039 PT |
977 | /* |
978 | * We fatal error on write before. Try to writeback | |
979 | * every page again. | |
980 | */ | |
981 | if (ctx->error < 0) | |
982 | invalidate_inode_pages2(inode->i_mapping); | |
1da177e4 LT |
983 | filp->private_data = NULL; |
984 | spin_lock(&inode->i_lock); | |
985 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
986 | spin_unlock(&inode->i_lock); | |
4eae5014 | 987 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
988 | } |
989 | } | |
990 | ||
991 | /* | |
992 | * These allocate and release file read/write context information. | |
993 | */ | |
994 | int nfs_open(struct inode *inode, struct file *filp) | |
995 | { | |
996 | struct nfs_open_context *ctx; | |
1da177e4 | 997 | |
532d4def | 998 | ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp); |
5ede7b1c AV |
999 | if (IS_ERR(ctx)) |
1000 | return PTR_ERR(ctx); | |
1da177e4 LT |
1001 | nfs_file_set_open_context(filp, ctx); |
1002 | put_nfs_open_context(ctx); | |
f1fe29b4 | 1003 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
1004 | return 0; |
1005 | } | |
1006 | ||
1da177e4 LT |
1007 | /* |
1008 | * This function is called whenever some part of NFS notices that | |
1009 | * the cached attributes have to be refreshed. | |
1010 | */ | |
1011 | int | |
1012 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1013 | { | |
1014 | int status = -ESTALE; | |
1775fd3e | 1015 | struct nfs4_label *label = NULL; |
a3cba2aa | 1016 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 1017 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1018 | |
1e8968c5 NV |
1019 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
1020 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 1021 | |
f4ce1299 TM |
1022 | trace_nfs_revalidate_inode_enter(inode); |
1023 | ||
85233a7a | 1024 | if (is_bad_inode(inode)) |
691beb13 | 1025 | goto out; |
1da177e4 | 1026 | if (NFS_STALE(inode)) |
412d582e | 1027 | goto out; |
7fdc49c4 | 1028 | |
ac46bd37 TM |
1029 | /* pNFS: Attributes aren't updated until we layoutcommit */ |
1030 | if (S_ISREG(inode->i_mode)) { | |
1031 | status = pnfs_sync_inode(inode, false); | |
1032 | if (status) | |
1033 | goto out; | |
1034 | } | |
1035 | ||
a3cba2aa TM |
1036 | status = -ENOMEM; |
1037 | fattr = nfs_alloc_fattr(); | |
1038 | if (fattr == NULL) | |
1039 | goto out; | |
1040 | ||
691beb13 | 1041 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
1042 | |
1043 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
1044 | if (IS_ERR(label)) { | |
1045 | status = PTR_ERR(label); | |
1046 | goto out; | |
1047 | } | |
1048 | ||
1775fd3e | 1049 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 | 1050 | if (status != 0) { |
1e8968c5 | 1051 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 1052 | inode->i_sb->s_id, |
1e8968c5 | 1053 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
1054 | if (status == -ESTALE) { |
1055 | nfs_zap_caches(inode); | |
1056 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 1057 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 1058 | } |
14c43f76 | 1059 | goto err_out; |
1da177e4 LT |
1060 | } |
1061 | ||
a3cba2aa | 1062 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 1063 | if (status) { |
1e8968c5 | 1064 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 1065 | inode->i_sb->s_id, |
1e8968c5 | 1066 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 1067 | goto err_out; |
1da177e4 | 1068 | } |
55296809 | 1069 | |
24aa1fe6 | 1070 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1071 | nfs_zap_acl_cache(inode); |
55296809 | 1072 | |
3da580aa JL |
1073 | nfs_setsecurity(inode, fattr, label); |
1074 | ||
1e8968c5 | 1075 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 1076 | inode->i_sb->s_id, |
1e8968c5 | 1077 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 1078 | |
14c43f76 DQ |
1079 | err_out: |
1080 | nfs4_label_free(label); | |
1081 | out: | |
a3cba2aa | 1082 | nfs_free_fattr(fattr); |
f4ce1299 | 1083 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
1084 | return status; |
1085 | } | |
1086 | ||
43f291cd | 1087 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 1088 | { |
b4d2314b | 1089 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 1090 | return 0; |
d7cf8dd0 | 1091 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
1092 | } |
1093 | ||
1094 | /** | |
1095 | * nfs_revalidate_inode - Revalidate the inode attributes | |
1096 | * @server - pointer to nfs_server struct | |
1097 | * @inode - pointer to inode struct | |
1098 | * | |
1099 | * Updates inode attribute information by retrieving the data from the server. | |
1100 | */ | |
1101 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1102 | { | |
311324ad | 1103 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1104 | return NFS_STALE(inode) ? -ESTALE : 0; |
1105 | return __nfs_revalidate_inode(server, inode); | |
1106 | } | |
1c606fb7 | 1107 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1108 | |
1cda707d | 1109 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1110 | { |
1111 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1112 | int ret; |
1113 | ||
717d44e8 | 1114 | if (mapping->nrpages != 0) { |
f8806c84 | 1115 | if (S_ISREG(inode->i_mode)) { |
ef070dcb | 1116 | unmap_mapping_range(mapping, 0, 0, 0); |
f8806c84 TM |
1117 | ret = nfs_sync_mapping(mapping); |
1118 | if (ret < 0) | |
1119 | return ret; | |
1120 | } | |
1121 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1122 | if (ret < 0) |
1123 | return ret; | |
1124 | } | |
d529ef83 JL |
1125 | if (S_ISDIR(inode->i_mode)) { |
1126 | spin_lock(&inode->i_lock); | |
717d44e8 | 1127 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1128 | spin_unlock(&inode->i_lock); |
1129 | } | |
717d44e8 | 1130 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1131 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1132 | |
1e8968c5 NV |
1133 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1134 | inode->i_sb->s_id, | |
1135 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1136 | return 0; |
1137 | } | |
1138 | ||
1cd9cb05 | 1139 | bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
b4b1eadf | 1140 | { |
61540bf6 TM |
1141 | return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) || |
1142 | NFS_STALE(inode); | |
b4b1eadf TM |
1143 | } |
1144 | ||
0d0def49 AV |
1145 | int nfs_revalidate_mapping_rcu(struct inode *inode) |
1146 | { | |
1147 | struct nfs_inode *nfsi = NFS_I(inode); | |
1148 | unsigned long *bitlock = &nfsi->flags; | |
1149 | int ret = 0; | |
1150 | ||
1151 | if (IS_SWAPFILE(inode)) | |
1152 | goto out; | |
1153 | if (nfs_mapping_need_revalidate_inode(inode)) { | |
1154 | ret = -ECHILD; | |
1155 | goto out; | |
1156 | } | |
1157 | spin_lock(&inode->i_lock); | |
1158 | if (test_bit(NFS_INO_INVALIDATING, bitlock) || | |
1159 | (nfsi->cache_validity & NFS_INO_INVALID_DATA)) | |
1160 | ret = -ECHILD; | |
1161 | spin_unlock(&inode->i_lock); | |
1162 | out: | |
1163 | return ret; | |
1164 | } | |
1165 | ||
717d44e8 | 1166 | /** |
be527494 | 1167 | * nfs_revalidate_mapping - Revalidate the pagecache |
717d44e8 TM |
1168 | * @inode - pointer to host inode |
1169 | * @mapping - pointer to mapping | |
717d44e8 | 1170 | */ |
be527494 TM |
1171 | int nfs_revalidate_mapping(struct inode *inode, |
1172 | struct address_space *mapping) | |
717d44e8 TM |
1173 | { |
1174 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1175 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1176 | int ret = 0; |
dc59250c | 1177 | |
29418aa4 MG |
1178 | /* swapfiles are not supposed to be shared. */ |
1179 | if (IS_SWAPFILE(inode)) | |
1180 | goto out; | |
1181 | ||
b4b1eadf | 1182 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1183 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1184 | if (ret < 0) | |
1185 | goto out; | |
7d52e862 | 1186 | } |
d529ef83 JL |
1187 | |
1188 | /* | |
1189 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1190 | * invalidations that come in while we're shooting down the mappings | |
1191 | * are respected. But, that leaves a race window where one revalidator | |
1192 | * can clear the flag, and then another checks it before the mapping | |
1193 | * gets invalidated. Fix that by serializing access to this part of | |
1194 | * the function. | |
1195 | * | |
1196 | * At the same time, we need to allow other tasks to see whether we | |
1197 | * might be in the middle of invalidating the pages, so we only set | |
1198 | * the bit lock here if it looks like we're going to be doing that. | |
1199 | */ | |
1200 | for (;;) { | |
74316201 N |
1201 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1202 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1203 | if (ret) |
1204 | goto out; | |
17dfeb91 TM |
1205 | spin_lock(&inode->i_lock); |
1206 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1207 | spin_unlock(&inode->i_lock); | |
1208 | continue; | |
1209 | } | |
1210 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1211 | break; |
d529ef83 | 1212 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1213 | goto out; |
f4ce1299 TM |
1214 | } |
1215 | ||
17dfeb91 | 1216 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1217 | smp_wmb(); |
17dfeb91 TM |
1218 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1219 | spin_unlock(&inode->i_lock); | |
1220 | trace_nfs_invalidate_mapping_enter(inode); | |
be527494 | 1221 | ret = nfs_invalidate_mapping(inode, mapping); |
17dfeb91 TM |
1222 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1223 | ||
d529ef83 | 1224 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1225 | smp_mb__after_atomic(); |
d529ef83 | 1226 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1227 | out: |
44b11874 | 1228 | return ret; |
7d52e862 TM |
1229 | } |
1230 | ||
ca0daa27 | 1231 | static bool nfs_file_has_writers(struct nfs_inode *nfsi) |
874f9463 | 1232 | { |
ca0daa27 TM |
1233 | struct inode *inode = &nfsi->vfs_inode; |
1234 | ||
1235 | assert_spin_locked(&inode->i_lock); | |
1236 | ||
1237 | if (!S_ISREG(inode->i_mode)) | |
1238 | return false; | |
1239 | if (list_empty(&nfsi->open_files)) | |
1240 | return false; | |
1241 | /* Note: This relies on nfsi->open_files being ordered with writers | |
1242 | * being placed at the head of the list. | |
1243 | * See nfs_inode_attach_open_context() | |
1244 | */ | |
1245 | return (list_first_entry(&nfsi->open_files, | |
1246 | struct nfs_open_context, | |
1247 | list)->mode & FMODE_WRITE) == FMODE_WRITE; | |
874f9463 TM |
1248 | } |
1249 | ||
651b0e70 | 1250 | static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi) |
874f9463 | 1251 | { |
651b0e70 | 1252 | return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi); |
874f9463 TM |
1253 | } |
1254 | ||
27dc1cd3 | 1255 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1256 | { |
1257 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1258 | unsigned long ret = 0; |
a895b4a1 | 1259 | |
9e6e70f8 TM |
1260 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1261 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1262 | && inode->i_version == fattr->pre_change_attr) { |
1263 | inode->i_version = fattr->change_attr; | |
70ca8852 | 1264 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1265 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1266 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1267 | } |
a895b4a1 | 1268 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1269 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1270 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1271 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1272 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1273 | ret |= NFS_INO_INVALID_ATTR; | |
1274 | } | |
9e6e70f8 TM |
1275 | |
1276 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1277 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1278 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1279 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1280 | if (S_ISDIR(inode->i_mode)) | |
6edf9609 | 1281 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1282 | ret |= NFS_INO_INVALID_ATTR; |
a895b4a1 | 1283 | } |
9e6e70f8 TM |
1284 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1285 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1286 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
cb1410c7 | 1287 | && nfsi->nrequests == 0) { |
27dc1cd3 TM |
1288 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
1289 | ret |= NFS_INO_INVALID_ATTR; | |
1290 | } | |
de242c0b | 1291 | |
27dc1cd3 | 1292 | return ret; |
a895b4a1 TM |
1293 | } |
1294 | ||
1da177e4 | 1295 | /** |
33801147 | 1296 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1297 | * @inode - pointer to inode |
1298 | * @fattr - updated attributes | |
1299 | * | |
1300 | * Verifies the attribute cache. If we have just changed the attributes, | |
1301 | * so that fattr carries weak cache consistency data, then it may | |
1302 | * also update the ctime/mtime/change_attribute. | |
1303 | */ | |
33801147 | 1304 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1305 | { |
1306 | struct nfs_inode *nfsi = NFS_I(inode); | |
1307 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1308 | unsigned long invalid = 0; |
1da177e4 | 1309 | |
dc59250c | 1310 | |
01da47bd TM |
1311 | if (nfs_have_delegated_attributes(inode)) |
1312 | return 0; | |
ca62b9c3 | 1313 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1314 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1315 | return -EIO; | |
1316 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1317 | return -EIO; |
ca62b9c3 | 1318 | |
651b0e70 | 1319 | if (!nfs_file_has_buffered_writers(nfsi)) { |
ca0daa27 TM |
1320 | /* Verify a few of the more important attributes */ |
1321 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && inode->i_version != fattr->change_attr) | |
1322 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_REVAL_PAGECACHE; | |
1da177e4 | 1323 | |
ca0daa27 TM |
1324 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
1325 | invalid |= NFS_INO_INVALID_ATTR; | |
ca62b9c3 | 1326 | |
ca0daa27 TM |
1327 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&inode->i_ctime, &fattr->ctime)) |
1328 | invalid |= NFS_INO_INVALID_ATTR; | |
1329 | ||
1330 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { | |
1331 | cur_size = i_size_read(inode); | |
1332 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1333 | if (cur_size != new_isize) | |
1334 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1335 | } | |
9e6e70f8 | 1336 | } |
1da177e4 LT |
1337 | |
1338 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1339 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1340 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1341 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1342 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1343 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1344 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1345 | |
1346 | /* Has the link count changed? */ | |
9e6e70f8 | 1347 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1348 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1349 | |
9e6e70f8 | 1350 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1351 | invalid |= NFS_INO_INVALID_ATIME; |
1352 | ||
1353 | if (invalid != 0) | |
1ad13dbc | 1354 | nfs_set_cache_invalid(inode, invalid | NFS_INO_REVAL_FORCED); |
1da177e4 | 1355 | |
33801147 | 1356 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1357 | return 0; |
1358 | } | |
1359 | ||
ae05f269 | 1360 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1361 | |
1362 | static unsigned long nfs_read_attr_generation_counter(void) | |
1363 | { | |
ae05f269 | 1364 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1365 | } |
1366 | ||
1367 | unsigned long nfs_inc_attr_generation_counter(void) | |
1368 | { | |
ae05f269 | 1369 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 | 1370 | } |
3235b403 | 1371 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
4704f0e2 TM |
1372 | |
1373 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1374 | { | |
1375 | fattr->valid = 0; | |
1376 | fattr->time_start = jiffies; | |
1377 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1378 | fattr->owner_name = NULL; |
1379 | fattr->group_name = NULL; | |
4704f0e2 | 1380 | } |
ddda8e0a | 1381 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1382 | |
140e049c TM |
1383 | /** |
1384 | * nfs_fattr_set_barrier | |
1385 | * @fattr: attributes | |
1386 | * | |
1387 | * Used to set a barrier after an attribute was updated. This | |
1388 | * barrier ensures that older attributes from RPC calls that may | |
1389 | * have raced with our update cannot clobber these new values. | |
1390 | * Note that you are still responsible for ensuring that other | |
1391 | * operations which change the attribute on the server do not | |
1392 | * collide. | |
1393 | */ | |
1394 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) | |
1395 | { | |
1396 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1397 | } | |
1398 | ||
2d36bfde TM |
1399 | struct nfs_fattr *nfs_alloc_fattr(void) |
1400 | { | |
1401 | struct nfs_fattr *fattr; | |
1402 | ||
1403 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1404 | if (fattr != NULL) | |
1405 | nfs_fattr_init(fattr); | |
1406 | return fattr; | |
1407 | } | |
ddda8e0a | 1408 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1409 | |
1410 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1411 | { | |
1412 | struct nfs_fh *fh; | |
1413 | ||
1414 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1415 | if (fh != NULL) | |
1416 | fh->size = 0; | |
1417 | return fh; | |
1418 | } | |
ddda8e0a | 1419 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1420 | |
e27d359e | 1421 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1422 | /* |
1423 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1424 | * in the same way that wireshark does | |
1425 | * | |
1426 | * @fh: file handle | |
1427 | * | |
1428 | * For debugging only. | |
1429 | */ | |
1430 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1431 | { | |
1432 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1433 | * not on the result */ | |
1264a2f0 | 1434 | return nfs_fhandle_hash(fh); |
d8e0539e | 1435 | } |
9e6ee76d | 1436 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1437 | |
1438 | /* | |
20d27e92 CL |
1439 | * _nfs_display_fhandle - display an NFS file handle on the console |
1440 | * | |
1441 | * @fh: file handle to display | |
1442 | * @caption: display caption | |
1443 | * | |
1444 | * For debugging only. | |
1445 | */ | |
20d27e92 CL |
1446 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1447 | { | |
1448 | unsigned short i; | |
1449 | ||
fa68a1ba | 1450 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1451 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1452 | return; | |
1453 | } | |
1454 | ||
d8e0539e WAA |
1455 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1456 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1457 | for (i = 0; i < fh->size; i += 16) { |
1458 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1459 | ||
1460 | switch ((fh->size - i - 1) >> 2) { | |
1461 | case 0: | |
1462 | printk(KERN_DEFAULT " %08x\n", | |
1463 | be32_to_cpup(pos)); | |
1464 | break; | |
1465 | case 1: | |
1466 | printk(KERN_DEFAULT " %08x %08x\n", | |
1467 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1468 | break; | |
1469 | case 2: | |
1470 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1471 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1472 | be32_to_cpup(pos + 2)); | |
1473 | break; | |
1474 | default: | |
1475 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1476 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1477 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1478 | } | |
1479 | } | |
1480 | } | |
9e6ee76d | 1481 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1482 | #endif |
1483 | ||
a10ad176 TM |
1484 | /** |
1485 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1486 | * @inode - pointer to inode | |
1487 | * @fattr - attributes | |
1488 | * | |
1489 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1490 | * attributes got scheduled after another call carrying updated ones. | |
1491 | * | |
1492 | * To do so, the function first assumes that a more recent ctime means | |
1493 | * that the attributes in fattr are newer, however it also attempt to | |
1494 | * catch the case where ctime either didn't change, or went backwards | |
1495 | * (if someone reset the clock on the server) by looking at whether | |
1496 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1497 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1498 | * |
1499 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1500 | * more recent than the ones cached in the inode. | |
1501 | * | |
1502 | */ | |
1503 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1504 | { | |
1505 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1506 | ||
4704f0e2 | 1507 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
4704f0e2 | 1508 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1509 | } |
1510 | ||
1511 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1512 | { | |
f4ce1299 TM |
1513 | int ret; |
1514 | ||
1515 | trace_nfs_refresh_inode_enter(inode); | |
1516 | ||
a10ad176 | 1517 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1518 | ret = nfs_update_inode(inode, fattr); |
1519 | else | |
1520 | ret = nfs_check_inode_attributes(inode, fattr); | |
1521 | ||
1522 | trace_nfs_refresh_inode_exit(inode, ret); | |
1523 | return ret; | |
870a5be8 TM |
1524 | } |
1525 | ||
33801147 TM |
1526 | /** |
1527 | * nfs_refresh_inode - try to update the inode attribute cache | |
1528 | * @inode - pointer to inode | |
1529 | * @fattr - updated attributes | |
1530 | * | |
1531 | * Check that an RPC call that returned attributes has not overlapped with | |
1532 | * other recent updates of the inode metadata, then decide whether it is | |
1533 | * safe to do a full update of the inode attributes, or whether just to | |
1534 | * call nfs_check_inode_attributes. | |
1535 | */ | |
1536 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1537 | { | |
33801147 TM |
1538 | int status; |
1539 | ||
1540 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1541 | return 0; | |
1542 | spin_lock(&inode->i_lock); | |
870a5be8 | 1543 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1544 | spin_unlock(&inode->i_lock); |
ef79c097 | 1545 | |
33801147 TM |
1546 | return status; |
1547 | } | |
ddda8e0a | 1548 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1549 | |
d65f557f TM |
1550 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1551 | { | |
ca0daa27 | 1552 | unsigned long invalid = NFS_INO_INVALID_ATTR; |
d65f557f | 1553 | |
6edf9609 TM |
1554 | if (S_ISDIR(inode->i_mode)) |
1555 | invalid |= NFS_INO_INVALID_DATA; | |
1556 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1557 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1558 | return 0; | |
1559 | return nfs_refresh_inode_locked(inode, fattr); | |
1560 | } | |
1561 | ||
decf491f TM |
1562 | /** |
1563 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1564 | * @inode - pointer to inode | |
1565 | * @fattr - updated attributes | |
1566 | * | |
1567 | * After an operation that has changed the inode metadata, mark the | |
1568 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1569 | * |
1570 | * NB: if the server didn't return any post op attributes, this | |
1571 | * function will force the retrieval of attributes before the next | |
1572 | * NFS request. Thus it should be used only for operations that | |
1573 | * are expected to change one or more attributes, to avoid | |
1574 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1575 | */ |
1576 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1577 | { | |
d65f557f | 1578 | int status; |
decf491f | 1579 | |
7668fdbe | 1580 | spin_lock(&inode->i_lock); |
92d64e47 | 1581 | nfs_fattr_set_barrier(fattr); |
d65f557f | 1582 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1583 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1584 | |
870a5be8 | 1585 | return status; |
decf491f | 1586 | } |
1c606fb7 | 1587 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1588 | |
70ca8852 | 1589 | /** |
a08a8cd3 | 1590 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
70ca8852 TM |
1591 | * @inode - pointer to inode |
1592 | * @fattr - updated attributes | |
1593 | * | |
1594 | * After an operation that has changed the inode metadata, mark the | |
1595 | * attribute cache as being invalid, then try to update it. Fake up | |
1596 | * weak cache consistency data, if none exist. | |
1597 | * | |
1598 | * This function is mainly designed to be used by the ->write_done() functions. | |
1599 | */ | |
a08a8cd3 | 1600 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
70ca8852 | 1601 | { |
d65f557f TM |
1602 | int status; |
1603 | ||
d65f557f TM |
1604 | /* Don't do a WCC update if these attributes are already stale */ |
1605 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1606 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1607 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1608 | | NFS_ATTR_FATTR_PRESIZE | |
1609 | | NFS_ATTR_FATTR_PREMTIME | |
1610 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1611 | goto out_noforce; |
1612 | } | |
9e6e70f8 TM |
1613 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1614 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1615 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1616 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1617 | } |
9e6e70f8 TM |
1618 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1619 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1620 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1621 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1622 | } | |
1623 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1624 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1625 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1626 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1627 | } | |
1628 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1629 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1630 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1631 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1632 | } |
d65f557f TM |
1633 | out_noforce: |
1634 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
a08a8cd3 TM |
1635 | return status; |
1636 | } | |
1637 | ||
1638 | /** | |
1639 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1640 | * @inode - pointer to inode | |
1641 | * @fattr - updated attributes | |
1642 | * | |
1643 | * After an operation that has changed the inode metadata, mark the | |
1644 | * attribute cache as being invalid, then try to update it. Fake up | |
1645 | * weak cache consistency data, if none exist. | |
1646 | * | |
1647 | * This function is mainly designed to be used by the ->write_done() functions. | |
1648 | */ | |
1649 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1650 | { | |
1651 | int status; | |
1652 | ||
1653 | spin_lock(&inode->i_lock); | |
8f8ba1d7 | 1654 | nfs_fattr_set_barrier(fattr); |
a08a8cd3 | 1655 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
d65f557f TM |
1656 | spin_unlock(&inode->i_lock); |
1657 | return status; | |
70ca8852 | 1658 | } |
ddda8e0a | 1659 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1660 | |
ea96d1ec AS |
1661 | |
1662 | static inline bool nfs_fileid_valid(struct nfs_inode *nfsi, | |
1663 | struct nfs_fattr *fattr) | |
1664 | { | |
1665 | bool ret1 = true, ret2 = true; | |
1666 | ||
1667 | if (fattr->valid & NFS_ATTR_FATTR_FILEID) | |
1668 | ret1 = (nfsi->fileid == fattr->fileid); | |
1669 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1670 | ret2 = (nfsi->fileid == fattr->mounted_on_fileid); | |
1671 | return ret1 || ret2; | |
1672 | } | |
1673 | ||
1da177e4 LT |
1674 | /* |
1675 | * Many nfs protocol calls return the new file attributes after | |
1676 | * an operation. Here we update the inode to reflect the state | |
1677 | * of the server's inode. | |
1678 | * | |
1679 | * This is a bit tricky because we have to make sure all dirty pages | |
1680 | * have been sent off to the server before calling invalidate_inode_pages. | |
1681 | * To make sure no other process adds more write requests while we try | |
1682 | * our best to flush them, we make them sleep during the attribute refresh. | |
1683 | * | |
1684 | * A very similar scenario holds for the dir cache. | |
1685 | */ | |
24aa1fe6 | 1686 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1687 | { |
8b4bdcf8 | 1688 | struct nfs_server *server; |
1da177e4 | 1689 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1690 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1691 | unsigned long invalid = 0; |
3e7d950a | 1692 | unsigned long now = jiffies; |
62ab460c | 1693 | unsigned long save_cache_validity; |
651b0e70 | 1694 | bool have_writers = nfs_file_has_buffered_writers(nfsi); |
944171cb | 1695 | bool cache_revalidated = true; |
1da177e4 | 1696 | |
1e8968c5 | 1697 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1698 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1699 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1700 | atomic_read(&inode->i_count), fattr->valid); |
1701 | ||
ea96d1ec | 1702 | if (!nfs_fileid_valid(nfsi, fattr)) { |
e73e6c9e MT |
1703 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
1704 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1705 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1706 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1707 | (long long)fattr->fileid); | |
1708 | goto out_err; | |
1709 | } | |
1da177e4 LT |
1710 | |
1711 | /* | |
1712 | * Make sure the inode's type hasn't changed. | |
1713 | */ | |
e73e6c9e MT |
1714 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1715 | /* | |
1716 | * Big trouble! The inode has become a different object. | |
1717 | */ | |
1e8968c5 | 1718 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1719 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1720 | goto out_err; | |
1721 | } | |
1da177e4 | 1722 | |
8b4bdcf8 | 1723 | server = NFS_SERVER(inode); |
a0356862 | 1724 | /* Update the fsid? */ |
9e6e70f8 | 1725 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1726 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1727 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1728 | server->fsid = fattr->fsid; |
1729 | ||
1da177e4 LT |
1730 | /* |
1731 | * Update the read time so we don't revalidate too often. | |
1732 | */ | |
33801147 | 1733 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1734 | |
62ab460c TM |
1735 | save_cache_validity = nfsi->cache_validity; |
1736 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1737 | | NFS_INO_INVALID_ATIME | |
1738 | | NFS_INO_REVAL_FORCED | |
1739 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1740 | |
a895b4a1 | 1741 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1742 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1743 | |
944171cb BC |
1744 | if (pnfs_layoutcommit_outstanding(inode)) { |
1745 | nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR; | |
1746 | cache_revalidated = false; | |
1747 | } | |
10b7e9ad | 1748 | |
47aabaa7 | 1749 | /* More cache consistency checks */ |
9e6e70f8 | 1750 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1751 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1752 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1753 | inode->i_sb->s_id, inode->i_ino); | |
38512aa9 | 1754 | /* Could it be a race with writeback? */ |
ca0daa27 | 1755 | if (!have_writers) { |
38512aa9 TM |
1756 | invalid |= NFS_INO_INVALID_ATTR |
1757 | | NFS_INO_INVALID_DATA | |
1758 | | NFS_INO_INVALID_ACCESS | |
1759 | | NFS_INO_INVALID_ACL; | |
1760 | if (S_ISDIR(inode->i_mode)) | |
1761 | nfs_force_lookup_revalidate(inode); | |
1762 | } | |
a9a4a87a | 1763 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1764 | } |
ade14a7d | 1765 | } else { |
43b6535e | 1766 | nfsi->cache_validity |= save_cache_validity; |
ade14a7d TM |
1767 | cache_revalidated = false; |
1768 | } | |
9e6e70f8 TM |
1769 | |
1770 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1771 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
ade14a7d | 1772 | } else if (server->caps & NFS_CAP_MTIME) { |
43b6535e TM |
1773 | nfsi->cache_validity |= save_cache_validity & |
1774 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1775 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1776 | cache_revalidated = false; |
1777 | } | |
62ab460c | 1778 | |
9e6e70f8 | 1779 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1780 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
ade14a7d | 1781 | } else if (server->caps & NFS_CAP_CTIME) { |
43b6535e TM |
1782 | nfsi->cache_validity |= save_cache_validity & |
1783 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1784 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1785 | cache_revalidated = false; |
1786 | } | |
47aabaa7 | 1787 | |
951a143b | 1788 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1789 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1790 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1791 | cur_isize = i_size_read(inode); | |
1792 | if (new_isize != cur_isize) { | |
1793 | /* Do we perhaps have any outstanding writes, or has | |
1794 | * the file grown beyond our last write? */ | |
ca0daa27 | 1795 | if (nfsi->nrequests == 0 || new_isize > cur_isize) { |
9e6e70f8 | 1796 | i_size_write(inode, new_isize); |
ca0daa27 TM |
1797 | if (!have_writers) |
1798 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
9e6e70f8 | 1799 | } |
60c16ea8 HJ |
1800 | dprintk("NFS: isize change on server for file %s/%ld " |
1801 | "(%Ld to %Ld)\n", | |
1802 | inode->i_sb->s_id, | |
1803 | inode->i_ino, | |
1804 | (long long)cur_isize, | |
1805 | (long long)new_isize); | |
1da177e4 | 1806 | } |
ade14a7d | 1807 | } else { |
43b6535e TM |
1808 | nfsi->cache_validity |= save_cache_validity & |
1809 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1810 | | NFS_INO_REVAL_PAGECACHE |
1811 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1812 | cache_revalidated = false; |
1813 | } | |
1da177e4 | 1814 | |
1da177e4 | 1815 | |
9e6e70f8 TM |
1816 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1817 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
ade14a7d | 1818 | else if (server->caps & NFS_CAP_ATIME) { |
43b6535e TM |
1819 | nfsi->cache_validity |= save_cache_validity & |
1820 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1821 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1822 | cache_revalidated = false; |
1823 | } | |
1da177e4 | 1824 | |
9e6e70f8 TM |
1825 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1826 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1827 | umode_t newmode = inode->i_mode & S_IFMT; |
1828 | newmode |= fattr->mode & S_IALLUGO; | |
1829 | inode->i_mode = newmode; | |
9e6e70f8 | 1830 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1831 | } |
ade14a7d | 1832 | } else if (server->caps & NFS_CAP_MODE) { |
43b6535e TM |
1833 | nfsi->cache_validity |= save_cache_validity & |
1834 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1835 | | NFS_INO_INVALID_ACCESS |
1836 | | NFS_INO_INVALID_ACL | |
1837 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1838 | cache_revalidated = false; |
1839 | } | |
62ab460c | 1840 | |
9e6e70f8 | 1841 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1842 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1843 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1844 | inode->i_uid = fattr->uid; | |
1845 | } | |
ade14a7d | 1846 | } else if (server->caps & NFS_CAP_OWNER) { |
43b6535e TM |
1847 | nfsi->cache_validity |= save_cache_validity & |
1848 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1849 | | NFS_INO_INVALID_ACCESS |
1850 | | NFS_INO_INVALID_ACL | |
1851 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1852 | cache_revalidated = false; |
1853 | } | |
62ab460c | 1854 | |
9e6e70f8 | 1855 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1856 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1857 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1858 | inode->i_gid = fattr->gid; | |
1859 | } | |
ade14a7d | 1860 | } else if (server->caps & NFS_CAP_OWNER_GROUP) { |
43b6535e TM |
1861 | nfsi->cache_validity |= save_cache_validity & |
1862 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1863 | | NFS_INO_INVALID_ACCESS |
1864 | | NFS_INO_INVALID_ACL | |
1865 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1866 | cache_revalidated = false; |
1867 | } | |
921615f1 | 1868 | |
9e6e70f8 TM |
1869 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1870 | if (inode->i_nlink != fattr->nlink) { | |
1871 | invalid |= NFS_INO_INVALID_ATTR; | |
1872 | if (S_ISDIR(inode->i_mode)) | |
1873 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1874 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1875 | } |
ade14a7d | 1876 | } else if (server->caps & NFS_CAP_NLINK) { |
43b6535e TM |
1877 | nfsi->cache_validity |= save_cache_validity & |
1878 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1879 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1880 | cache_revalidated = false; |
1881 | } | |
1da177e4 | 1882 | |
9e6e70f8 | 1883 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1884 | /* |
1885 | * report the blocks in 512byte units | |
1886 | */ | |
1887 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
ade14a7d | 1888 | } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
9e6e70f8 | 1889 | inode->i_blocks = fattr->du.nfs2.blocks; |
ade14a7d TM |
1890 | else |
1891 | cache_revalidated = false; | |
1da177e4 LT |
1892 | |
1893 | /* Update attrtimeo value if we're out of the unstable period */ | |
fd1defc2 | 1894 | if (invalid & NFS_INO_INVALID_ATTR) { |
91d5b470 | 1895 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1896 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1897 | nfsi->attrtimeo_timestamp = now; |
f5062003 | 1898 | /* Set barrier to be more recent than all outstanding updates */ |
4704f0e2 | 1899 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1900 | } else { |
ade14a7d TM |
1901 | if (cache_revalidated) { |
1902 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, | |
1903 | nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { | |
1904 | nfsi->attrtimeo <<= 1; | |
1905 | if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode)) | |
1906 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1907 | } | |
6d2b2966 TM |
1908 | nfsi->attrtimeo_timestamp = now; |
1909 | } | |
f5062003 TM |
1910 | /* Set the barrier to be more recent than this fattr */ |
1911 | if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) | |
1912 | nfsi->attr_gencount = fattr->gencount; | |
1da177e4 | 1913 | } |
c812012f JL |
1914 | |
1915 | /* Don't declare attrcache up to date if there were no attrs! */ | |
ade14a7d | 1916 | if (cache_revalidated) |
c812012f JL |
1917 | invalid &= ~NFS_INO_INVALID_ATTR; |
1918 | ||
1da177e4 LT |
1919 | /* Don't invalidate the data if we were to blame */ |
1920 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1921 | || S_ISLNK(inode->i_mode))) | |
1922 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1923 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1924 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
6edf9609 | 1925 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 1926 | |
1da177e4 | 1927 | return 0; |
b37b03b7 | 1928 | out_err: |
1da177e4 LT |
1929 | /* |
1930 | * No need to worry about unhashing the dentry, as the | |
1931 | * lookup validation will know that the inode is bad. | |
1932 | * (But we fall through to invalidate the caches.) | |
1933 | */ | |
1934 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1935 | return -ESTALE; |
1936 | } | |
1937 | ||
f7b422b1 | 1938 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1939 | { |
1940 | struct nfs_inode *nfsi; | |
c456aacf | 1941 | nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1942 | if (!nfsi) |
1943 | return NULL; | |
55296809 CL |
1944 | nfsi->flags = 0UL; |
1945 | nfsi->cache_validity = 0UL; | |
89d77c8f | 1946 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1947 | nfsi->nfs4_acl = NULL; |
1948 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1949 | return &nfsi->vfs_inode; |
1950 | } | |
89d77c8f | 1951 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1952 | |
fa0d7e3d | 1953 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1954 | { |
fa0d7e3d | 1955 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1956 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1957 | } | |
1958 | ||
fa0d7e3d NP |
1959 | void nfs_destroy_inode(struct inode *inode) |
1960 | { | |
1961 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1962 | } | |
89d77c8f | 1963 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1964 | |
d75d5414 AM |
1965 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1966 | { | |
89d77c8f | 1967 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1968 | INIT_LIST_HEAD(&nfsi->open_states); |
1969 | nfsi->delegation = NULL; | |
d75d5414 | 1970 | init_rwsem(&nfsi->rwsem); |
e5e94017 | 1971 | nfsi->layout = NULL; |
d75d5414 AM |
1972 | #endif |
1973 | } | |
f7b422b1 | 1974 | |
51cc5068 | 1975 | static void init_once(void *foo) |
1da177e4 LT |
1976 | { |
1977 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1978 | ||
a35afb83 | 1979 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1980 | INIT_LIST_HEAD(&nfsi->open_files); |
1981 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1982 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1983 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
cb1410c7 | 1984 | nfsi->nrequests = 0; |
ea2cf228 | 1985 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1986 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
884be175 | 1987 | init_rwsem(&nfsi->rmdir_sem); |
a35afb83 | 1988 | nfs4_init_once(nfsi); |
1da177e4 | 1989 | } |
20c2df83 | 1990 | |
f7b422b1 | 1991 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1992 | { |
1993 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1994 | sizeof(struct nfs_inode), | |
fffb60f9 | 1995 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 1996 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 1997 | init_once); |
1da177e4 LT |
1998 | if (nfs_inode_cachep == NULL) |
1999 | return -ENOMEM; | |
2000 | ||
2001 | return 0; | |
2002 | } | |
2003 | ||
266bee88 | 2004 | static void nfs_destroy_inodecache(void) |
1da177e4 | 2005 | { |
8c0a8537 KS |
2006 | /* |
2007 | * Make sure all delayed rcu free inodes are flushed before we | |
2008 | * destroy cache. | |
2009 | */ | |
2010 | rcu_barrier(); | |
1a1d92c1 | 2011 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
2012 | } |
2013 | ||
5746006f | 2014 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 2015 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
2016 | |
2017 | /* | |
2018 | * start up the nfsiod workqueue | |
2019 | */ | |
2020 | static int nfsiod_start(void) | |
2021 | { | |
2022 | struct workqueue_struct *wq; | |
2023 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 2024 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
2025 | if (wq == NULL) |
2026 | return -ENOMEM; | |
2027 | nfsiod_workqueue = wq; | |
2028 | return 0; | |
2029 | } | |
2030 | ||
2031 | /* | |
2032 | * Destroy the nfsiod workqueue | |
2033 | */ | |
2034 | static void nfsiod_stop(void) | |
2035 | { | |
2036 | struct workqueue_struct *wq; | |
2037 | ||
2038 | wq = nfsiod_workqueue; | |
2039 | if (wq == NULL) | |
2040 | return; | |
2041 | nfsiod_workqueue = NULL; | |
2042 | destroy_workqueue(wq); | |
2043 | } | |
2044 | ||
c7d03a00 | 2045 | unsigned int nfs_net_id; |
9e2e74db | 2046 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
2047 | |
2048 | static int nfs_net_init(struct net *net) | |
2049 | { | |
6b13168b | 2050 | nfs_clients_init(net); |
65b38851 | 2051 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
2052 | } |
2053 | ||
2054 | static void nfs_net_exit(struct net *net) | |
2055 | { | |
65b38851 | 2056 | nfs_fs_proc_net_exit(net); |
28cd1b3f | 2057 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
2058 | } |
2059 | ||
2060 | static struct pernet_operations nfs_net_ops = { | |
2061 | .init = nfs_net_init, | |
2062 | .exit = nfs_net_exit, | |
2063 | .id = &nfs_net_id, | |
2064 | .size = sizeof(struct nfs_net), | |
2065 | }; | |
2066 | ||
1da177e4 LT |
2067 | /* |
2068 | * Initialize NFS | |
2069 | */ | |
2070 | static int __init init_nfs_fs(void) | |
2071 | { | |
2072 | int err; | |
2073 | ||
1b340d01 | 2074 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 2075 | if (err < 0) |
89d77c8f | 2076 | goto out9; |
e571cbf1 | 2077 | |
8ec442ae DH |
2078 | err = nfs_fscache_register(); |
2079 | if (err < 0) | |
89d77c8f | 2080 | goto out8; |
8ec442ae | 2081 | |
5746006f TM |
2082 | err = nfsiod_start(); |
2083 | if (err) | |
89d77c8f | 2084 | goto out7; |
5746006f | 2085 | |
6aaca566 DH |
2086 | err = nfs_fs_proc_init(); |
2087 | if (err) | |
89d77c8f | 2088 | goto out6; |
6aaca566 | 2089 | |
1da177e4 LT |
2090 | err = nfs_init_nfspagecache(); |
2091 | if (err) | |
89d77c8f | 2092 | goto out5; |
1da177e4 LT |
2093 | |
2094 | err = nfs_init_inodecache(); | |
2095 | if (err) | |
89d77c8f | 2096 | goto out4; |
1da177e4 LT |
2097 | |
2098 | err = nfs_init_readpagecache(); | |
2099 | if (err) | |
89d77c8f | 2100 | goto out3; |
1da177e4 LT |
2101 | |
2102 | err = nfs_init_writepagecache(); | |
2103 | if (err) | |
89d77c8f | 2104 | goto out2; |
1da177e4 | 2105 | |
1da177e4 LT |
2106 | err = nfs_init_directcache(); |
2107 | if (err) | |
89d77c8f | 2108 | goto out1; |
1da177e4 | 2109 | |
ec7652aa | 2110 | rpc_proc_register(&init_net, &nfs_rpcstat); |
cd738ee9 KM |
2111 | |
2112 | err = register_nfs_fs(); | |
2113 | if (err) | |
129d1977 BS |
2114 | goto out0; |
2115 | ||
1da177e4 | 2116 | return 0; |
129d1977 | 2117 | out0: |
ec7652aa | 2118 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2119 | nfs_destroy_directcache(); |
89d77c8f | 2120 | out1: |
129d1977 | 2121 | nfs_destroy_writepagecache(); |
89d77c8f | 2122 | out2: |
129d1977 | 2123 | nfs_destroy_readpagecache(); |
89d77c8f | 2124 | out3: |
129d1977 | 2125 | nfs_destroy_inodecache(); |
89d77c8f | 2126 | out4: |
129d1977 | 2127 | nfs_destroy_nfspagecache(); |
89d77c8f | 2128 | out5: |
129d1977 | 2129 | nfs_fs_proc_exit(); |
89d77c8f | 2130 | out6: |
129d1977 | 2131 | nfsiod_stop(); |
89d77c8f | 2132 | out7: |
129d1977 | 2133 | nfs_fscache_unregister(); |
89d77c8f | 2134 | out8: |
129d1977 | 2135 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 2136 | out9: |
1da177e4 LT |
2137 | return err; |
2138 | } | |
2139 | ||
2140 | static void __exit exit_nfs_fs(void) | |
2141 | { | |
1da177e4 | 2142 | nfs_destroy_directcache(); |
1da177e4 LT |
2143 | nfs_destroy_writepagecache(); |
2144 | nfs_destroy_readpagecache(); | |
2145 | nfs_destroy_inodecache(); | |
2146 | nfs_destroy_nfspagecache(); | |
8ec442ae | 2147 | nfs_fscache_unregister(); |
1b340d01 | 2148 | unregister_pernet_subsys(&nfs_net_ops); |
ec7652aa | 2149 | rpc_proc_unregister(&init_net, "nfs"); |
f7b422b1 | 2150 | unregister_nfs_fs(); |
6aaca566 | 2151 | nfs_fs_proc_exit(); |
5746006f | 2152 | nfsiod_stop(); |
1da177e4 LT |
2153 | } |
2154 | ||
2155 | /* Not quite true; I just maintain it */ | |
2156 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2157 | MODULE_LICENSE("GPL"); | |
f43bf0be | 2158 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
2159 | |
2160 | module_init(init_nfs_fs) | |
2161 | module_exit(exit_nfs_fs) |