Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * linux/fs/nfs/inode.c | |
4 | * | |
5 | * Copyright (C) 1992 Rick Sladkey | |
6 | * | |
7 | * nfs inode and superblock handling functions | |
8 | * | |
526719ba | 9 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
10 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
11 | * | |
12 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
13 | * J.S.Peatfield@damtp.cam.ac.uk | |
14 | * | |
15 | */ | |
16 | ||
1da177e4 LT |
17 | #include <linux/module.h> |
18 | #include <linux/init.h> | |
174cd4b1 | 19 | #include <linux/sched/signal.h> |
1da177e4 LT |
20 | #include <linux/time.h> |
21 | #include <linux/kernel.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/stat.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/unistd.h> | |
27 | #include <linux/sunrpc/clnt.h> | |
28 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 29 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
30 | #include <linux/nfs_fs.h> |
31 | #include <linux/nfs_mount.h> | |
32 | #include <linux/nfs4_mount.h> | |
33 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
34 | #include <linux/seq_file.h> |
35 | #include <linux/mount.h> | |
1da177e4 | 36 | #include <linux/vfs.h> |
9cdb3883 MN |
37 | #include <linux/inet.h> |
38 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
3fa0b4e2 | 40 | #include <linux/compat.h> |
d310310c | 41 | #include <linux/freezer.h> |
7c0f6ba6 | 42 | #include <linux/uaccess.h> |
1eb5d98f | 43 | #include <linux/iversion.h> |
1da177e4 | 44 | |
4ce79717 | 45 | #include "nfs4_fs.h" |
a72b4422 | 46 | #include "callback.h" |
1da177e4 | 47 | #include "delegation.h" |
d9ef5a8c | 48 | #include "iostat.h" |
f7b422b1 | 49 | #include "internal.h" |
8ec442ae | 50 | #include "fscache.h" |
e5e94017 | 51 | #include "pnfs.h" |
ab7017a3 | 52 | #include "nfs.h" |
1b340d01 | 53 | #include "netns.h" |
996bc4f4 | 54 | #include "sysfs.h" |
1da177e4 | 55 | |
f4ce1299 TM |
56 | #include "nfstrace.h" |
57 | ||
1da177e4 | 58 | #define NFSDBG_FACILITY NFSDBG_VFS |
1da177e4 | 59 | |
f43bf0be TM |
60 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
61 | ||
62 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 63 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 64 | |
24aa1fe6 | 65 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 66 | |
e18b890b | 67 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 68 | |
1da177e4 LT |
69 | static inline unsigned long |
70 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
71 | { | |
72 | return nfs_fileid_to_ino_t(fattr->fileid); | |
73 | } | |
74 | ||
210c7c17 | 75 | static int nfs_wait_killable(int mode) |
72cb77f4 | 76 | { |
416ad3c9 | 77 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
78 | if (signal_pending_state(mode, current)) |
79 | return -ERESTARTSYS; | |
72cb77f4 TM |
80 | return 0; |
81 | } | |
210c7c17 BC |
82 | |
83 | int nfs_wait_bit_killable(struct wait_bit_key *key, int mode) | |
84 | { | |
85 | return nfs_wait_killable(mode); | |
86 | } | |
89d77c8f | 87 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 88 | |
f43bf0be TM |
89 | /** |
90 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
91 | * @fileid: 64-bit fileid | |
92 | * | |
93 | * This function returns a 32-bit inode number if the boot parameter | |
94 | * nfs.enable_ino64 is zero. | |
95 | */ | |
96 | u64 nfs_compat_user_ino64(u64 fileid) | |
97 | { | |
3fa0b4e2 FF |
98 | #ifdef CONFIG_COMPAT |
99 | compat_ulong_t ino; | |
100 | #else | |
101 | unsigned long ino; | |
102 | #endif | |
f43bf0be TM |
103 | |
104 | if (enable_ino64) | |
105 | return fileid; | |
106 | ino = fileid; | |
107 | if (sizeof(ino) < sizeof(fileid)) | |
108 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
109 | return ino; | |
110 | } | |
111 | ||
eed99357 TM |
112 | int nfs_drop_inode(struct inode *inode) |
113 | { | |
114 | return NFS_STALE(inode) || generic_drop_inode(inode); | |
115 | } | |
116 | EXPORT_SYMBOL_GPL(nfs_drop_inode); | |
117 | ||
19d87ca3 | 118 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 119 | { |
da6d503a TM |
120 | /* |
121 | * The following should never happen... | |
122 | */ | |
f48407dd TM |
123 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
124 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); | |
ada70d94 | 125 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 126 | nfs_access_zap_cache(inode); |
f1fe29b4 | 127 | nfs_fscache_clear_inode(inode); |
1da177e4 | 128 | } |
89d77c8f | 129 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 130 | |
b57922d9 AV |
131 | void nfs_evict_inode(struct inode *inode) |
132 | { | |
91b0abe3 | 133 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 134 | clear_inode(inode); |
b57922d9 AV |
135 | nfs_clear_inode(inode); |
136 | } | |
137 | ||
9e1681c2 | 138 | int nfs_sync_inode(struct inode *inode) |
4d346bea | 139 | { |
95d9f6c3 | 140 | inode_dio_wait(inode); |
4d346bea TM |
141 | return nfs_wb_all(inode); |
142 | } | |
9e1681c2 | 143 | EXPORT_SYMBOL_GPL(nfs_sync_inode); |
4d346bea | 144 | |
29884df0 TM |
145 | /** |
146 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
302fad7b | 147 | * @mapping: pointer to struct address_space |
29884df0 TM |
148 | */ |
149 | int nfs_sync_mapping(struct address_space *mapping) | |
150 | { | |
5cf95214 | 151 | int ret = 0; |
29884df0 | 152 | |
5cf95214 TM |
153 | if (mapping->nrpages != 0) { |
154 | unmap_mapping_range(mapping, 0, 0, 0); | |
155 | ret = nfs_wb_all(mapping->host); | |
156 | } | |
29884df0 TM |
157 | return ret; |
158 | } | |
159 | ||
187e593d TM |
160 | static int nfs_attribute_timeout(struct inode *inode) |
161 | { | |
162 | struct nfs_inode *nfsi = NFS_I(inode); | |
163 | ||
164 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); | |
165 | } | |
166 | ||
61540bf6 TM |
167 | static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags) |
168 | { | |
169 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
170 | ||
171 | /* Special case for the pagecache or access cache */ | |
172 | if (flags == NFS_INO_REVAL_PAGECACHE && | |
173 | !(cache_validity & NFS_INO_REVAL_FORCED)) | |
174 | return false; | |
175 | return (cache_validity & flags) != 0; | |
176 | } | |
177 | ||
178 | static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags) | |
179 | { | |
180 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
181 | ||
182 | if ((cache_validity & flags) != 0) | |
183 | return true; | |
184 | if (nfs_attribute_timeout(inode)) | |
185 | return true; | |
186 | return false; | |
187 | } | |
188 | ||
189 | bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags) | |
190 | { | |
191 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) | |
192 | return nfs_check_cache_invalid_delegated(inode, flags); | |
193 | ||
194 | return nfs_check_cache_invalid_not_delegated(inode, flags); | |
195 | } | |
95ad37f9 | 196 | EXPORT_SYMBOL_GPL(nfs_check_cache_invalid); |
61540bf6 | 197 | |
6edf9609 TM |
198 | static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags) |
199 | { | |
200 | struct nfs_inode *nfsi = NFS_I(inode); | |
3f0b3cf4 TM |
201 | bool have_delegation = NFS_PROTO(inode)->have_delegation(inode, FMODE_READ); |
202 | ||
203 | if (have_delegation) { | |
204 | if (!(flags & NFS_INO_REVAL_FORCED)) | |
205 | flags &= ~NFS_INO_INVALID_OTHER; | |
206 | flags &= ~(NFS_INO_INVALID_CHANGE | |
207 | | NFS_INO_INVALID_SIZE | |
0f44da51 FL |
208 | | NFS_INO_REVAL_PAGECACHE |
209 | | NFS_INO_INVALID_XATTR); | |
3f0b3cf4 | 210 | } |
6edf9609 TM |
211 | |
212 | if (inode->i_mapping->nrpages == 0) | |
1c341b77 | 213 | flags &= ~(NFS_INO_INVALID_DATA|NFS_INO_DATA_INVAL_DEFER); |
6edf9609 TM |
214 | nfsi->cache_validity |= flags; |
215 | if (flags & NFS_INO_INVALID_DATA) | |
216 | nfs_fscache_invalidate(inode); | |
217 | } | |
218 | ||
1da177e4 LT |
219 | /* |
220 | * Invalidate the local caches | |
221 | */ | |
b37b03b7 | 222 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
223 | { |
224 | struct nfs_inode *nfsi = NFS_I(inode); | |
225 | int mode = inode->i_mode; | |
226 | ||
91d5b470 CL |
227 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
228 | ||
c7c20973 TM |
229 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
230 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 231 | |
de242c0b | 232 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
6edf9609 | 233 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
234 | | NFS_INO_INVALID_DATA |
235 | | NFS_INO_INVALID_ACCESS | |
236 | | NFS_INO_INVALID_ACL | |
95ad37f9 | 237 | | NFS_INO_INVALID_XATTR |
6edf9609 | 238 | | NFS_INO_REVAL_PAGECACHE); |
aa9c2669 | 239 | } else |
6edf9609 | 240 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
241 | | NFS_INO_INVALID_ACCESS |
242 | | NFS_INO_INVALID_ACL | |
95ad37f9 | 243 | | NFS_INO_INVALID_XATTR |
6edf9609 | 244 | | NFS_INO_REVAL_PAGECACHE); |
fd1defc2 | 245 | nfs_zap_label_cache_locked(nfsi); |
b37b03b7 | 246 | } |
dc59250c | 247 | |
b37b03b7 TM |
248 | void nfs_zap_caches(struct inode *inode) |
249 | { | |
250 | spin_lock(&inode->i_lock); | |
251 | nfs_zap_caches_locked(inode); | |
dc59250c | 252 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
253 | } |
254 | ||
cd9ae2b6 TM |
255 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
256 | { | |
257 | if (mapping->nrpages != 0) { | |
258 | spin_lock(&inode->i_lock); | |
6edf9609 | 259 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
cd9ae2b6 TM |
260 | spin_unlock(&inode->i_lock); |
261 | } | |
262 | } | |
263 | ||
f41f7418 | 264 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
265 | { |
266 | void (*clear_acl_cache)(struct inode *); | |
267 | ||
268 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
269 | if (clear_acl_cache != NULL) | |
270 | clear_acl_cache(inode); | |
dc59250c | 271 | spin_lock(&inode->i_lock); |
55296809 | 272 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 273 | spin_unlock(&inode->i_lock); |
1da177e4 | 274 | } |
1c606fb7 | 275 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 276 | |
c4812998 TM |
277 | void nfs_invalidate_atime(struct inode *inode) |
278 | { | |
279 | spin_lock(&inode->i_lock); | |
6edf9609 | 280 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
c4812998 TM |
281 | spin_unlock(&inode->i_lock); |
282 | } | |
ddda8e0a | 283 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 284 | |
1da177e4 | 285 | /* |
b37b03b7 TM |
286 | * Invalidate, but do not unhash, the inode. |
287 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 288 | */ |
93ce4af7 | 289 | static void nfs_set_inode_stale_locked(struct inode *inode) |
1da177e4 | 290 | { |
3a10c30a | 291 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 292 | nfs_zap_caches_locked(inode); |
93ce4af7 TM |
293 | trace_nfs_set_inode_stale(inode); |
294 | } | |
295 | ||
296 | void nfs_set_inode_stale(struct inode *inode) | |
297 | { | |
298 | spin_lock(&inode->i_lock); | |
299 | nfs_set_inode_stale_locked(inode); | |
300 | spin_unlock(&inode->i_lock); | |
1da177e4 LT |
301 | } |
302 | ||
303 | struct nfs_find_desc { | |
304 | struct nfs_fh *fh; | |
305 | struct nfs_fattr *fattr; | |
306 | }; | |
307 | ||
308 | /* | |
309 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
310 | * this, and re-exported directories (also seen in NFSv2) | |
311 | * we are forced to allow 2 different inodes to have the same | |
312 | * i_ino. | |
313 | */ | |
314 | static int | |
315 | nfs_find_actor(struct inode *inode, void *opaque) | |
316 | { | |
317 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
318 | struct nfs_fh *fh = desc->fh; | |
319 | struct nfs_fattr *fattr = desc->fattr; | |
320 | ||
321 | if (NFS_FILEID(inode) != fattr->fileid) | |
322 | return 0; | |
f6488c9b JL |
323 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
324 | return 0; | |
1da177e4 LT |
325 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
326 | return 0; | |
327 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
328 | return 0; | |
329 | return 1; | |
330 | } | |
331 | ||
332 | static int | |
333 | nfs_init_locked(struct inode *inode, void *opaque) | |
334 | { | |
335 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
336 | struct nfs_fattr *fattr = desc->fattr; | |
337 | ||
99fadcd7 | 338 | set_nfs_fileid(inode, fattr->fileid); |
916ec34d | 339 | inode->i_mode = fattr->mode; |
1da177e4 LT |
340 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
341 | return 0; | |
342 | } | |
343 | ||
e058f70b | 344 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
fd1defc2 TM |
345 | static void nfs_clear_label_invalid(struct inode *inode) |
346 | { | |
347 | spin_lock(&inode->i_lock); | |
348 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; | |
349 | spin_unlock(&inode->i_lock); | |
350 | } | |
351 | ||
aa9c2669 DQ |
352 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
353 | struct nfs4_label *label) | |
354 | { | |
355 | int error; | |
356 | ||
357 | if (label == NULL) | |
358 | return; | |
359 | ||
aa9c2669 DQ |
360 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
361 | error = security_inode_notifysecctx(inode, label->label, | |
362 | label->len); | |
363 | if (error) | |
364 | printk(KERN_ERR "%s() %s %d " | |
365 | "security_inode_notifysecctx() %d\n", | |
366 | __func__, | |
367 | (char *)label->label, | |
368 | label->len, error); | |
fd1defc2 | 369 | nfs_clear_label_invalid(inode); |
aa9c2669 DQ |
370 | } |
371 | } | |
372 | ||
e058f70b SD |
373 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
374 | { | |
375 | struct nfs4_label *label = NULL; | |
376 | int minor_version = server->nfs_client->cl_minorversion; | |
377 | ||
378 | if (minor_version < 2) | |
379 | return label; | |
380 | ||
381 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
382 | return label; | |
383 | ||
384 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
385 | if (label == NULL) | |
386 | return ERR_PTR(-ENOMEM); | |
387 | ||
388 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
389 | if (label->label == NULL) { | |
390 | kfree(label); | |
391 | return ERR_PTR(-ENOMEM); | |
392 | } | |
393 | label->len = NFS4_MAXLABELLEN; | |
394 | ||
395 | return label; | |
396 | } | |
397 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 398 | #else |
829e57d7 | 399 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
aa9c2669 DQ |
400 | struct nfs4_label *label) |
401 | { | |
402 | } | |
e058f70b | 403 | #endif |
aa9c2669 | 404 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 405 | |
f174ff7a PT |
406 | /* Search for inode identified by fh, fileid and i_mode in inode cache. */ |
407 | struct inode * | |
408 | nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh) | |
409 | { | |
410 | struct nfs_find_desc desc = { | |
411 | .fh = fh, | |
412 | .fattr = fattr, | |
413 | }; | |
414 | struct inode *inode; | |
415 | unsigned long hash; | |
416 | ||
417 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) || | |
418 | !(fattr->valid & NFS_ATTR_FATTR_TYPE)) | |
419 | return NULL; | |
420 | ||
421 | hash = nfs_fattr_to_ino_t(fattr); | |
422 | inode = ilookup5(sb, hash, nfs_find_actor, &desc); | |
423 | ||
424 | dprintk("%s: returning %p\n", __func__, inode); | |
425 | return inode; | |
426 | } | |
427 | ||
1da177e4 LT |
428 | /* |
429 | * This is our front-end to iget that looks up inodes by file handle | |
430 | * instead of inode number. | |
431 | */ | |
432 | struct inode * | |
1775fd3e | 433 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
434 | { |
435 | struct nfs_find_desc desc = { | |
436 | .fh = fh, | |
437 | .fattr = fattr | |
438 | }; | |
03f28e3a | 439 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
440 | unsigned long hash; |
441 | ||
7ebb9315 BS |
442 | nfs_attr_check_mountpoint(sb, fattr); |
443 | ||
2ef47eb1 AS |
444 | if (nfs_attr_use_mounted_on_fileid(fattr)) |
445 | fattr->fileid = fattr->mounted_on_fileid; | |
446 | else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) | |
1da177e4 | 447 | goto out_no_inode; |
9e6e70f8 | 448 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 449 | goto out_no_inode; |
1da177e4 LT |
450 | |
451 | hash = nfs_fattr_to_ino_t(fattr); | |
452 | ||
03f28e3a TM |
453 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
454 | if (inode == NULL) { | |
455 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 456 | goto out_no_inode; |
03f28e3a | 457 | } |
1da177e4 LT |
458 | |
459 | if (inode->i_state & I_NEW) { | |
460 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 461 | unsigned long now = jiffies; |
1da177e4 LT |
462 | |
463 | /* We set i_ino for the few things that still rely on it, | |
464 | * such as stat(2) */ | |
465 | inode->i_ino = hash; | |
466 | ||
467 | /* We can't support update_atime(), since the server will reset it */ | |
468 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
469 | inode->i_mode = fattr->mode; | |
821a868a | 470 | nfsi->cache_validity = 0; |
62ab460c TM |
471 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
472 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
16e14375 | 473 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
1da177e4 LT |
474 | /* Why so? Because we want revalidate for devices/FIFOs, and |
475 | * that's precisely what we have in nfs_file_inode_operations. | |
476 | */ | |
8fa5c000 | 477 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 478 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 479 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 | 480 | inode->i_data.a_ops = &nfs_file_aops; |
1da177e4 | 481 | } else if (S_ISDIR(inode->i_mode)) { |
8fa5c000 | 482 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 483 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 484 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 485 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
486 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
487 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
488 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
489 | inode->i_op = &nfs_referral_inode_operations; | |
490 | else | |
491 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 492 | inode->i_fop = NULL; |
36d43a43 | 493 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 494 | } |
21fc61c7 | 495 | } else if (S_ISLNK(inode->i_mode)) { |
1da177e4 | 496 | inode->i_op = &nfs_symlink_inode_operations; |
21fc61c7 AV |
497 | inode_nohighmem(inode); |
498 | } else | |
1da177e4 LT |
499 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
500 | ||
9e6e70f8 TM |
501 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
502 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
503 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
1eb5d98f | 504 | inode_set_iversion_raw(inode, 0); |
9e6e70f8 | 505 | inode->i_size = 0; |
6d6b77f1 | 506 | clear_nlink(inode); |
9ff593c4 EB |
507 | inode->i_uid = make_kuid(&init_user_ns, -2); |
508 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
509 | inode->i_blocks = 0; |
510 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
511 | nfsi->write_io = 0; |
512 | nfsi->read_io = 0; | |
9e6e70f8 | 513 | |
33801147 | 514 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 515 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 | 516 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
e86d5a02 | 517 | inode->i_atime = fattr->atime; |
62ab460c | 518 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
16e14375 | 519 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
9e6e70f8 | 520 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
e86d5a02 | 521 | inode->i_mtime = fattr->mtime; |
62ab460c | 522 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
16e14375 | 523 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); |
9e6e70f8 | 524 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
e86d5a02 | 525 | inode->i_ctime = fattr->ctime; |
62ab460c | 526 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
16e14375 | 527 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME); |
9e6e70f8 | 528 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1eb5d98f | 529 | inode_set_iversion_raw(inode, fattr->change_attr); |
cd812599 | 530 | else |
16e14375 | 531 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE); |
9e6e70f8 TM |
532 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
533 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 534 | else |
16e14375 | 535 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE); |
9e6e70f8 | 536 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 537 | set_nlink(inode, fattr->nlink); |
62ab460c | 538 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
16e14375 | 539 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
9e6e70f8 TM |
540 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
541 | inode->i_uid = fattr->uid; | |
62ab460c | 542 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
16e14375 | 543 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
9e6e70f8 TM |
544 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
545 | inode->i_gid = fattr->gid; | |
62ab460c | 546 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
16e14375 | 547 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
0f44da51 FL |
548 | if (nfs_server_capable(inode, NFS_CAP_XATTR)) |
549 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR); | |
9e6e70f8 TM |
550 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
551 | inode->i_blocks = fattr->du.nfs2.blocks; | |
552 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
553 | /* |
554 | * report the blocks in 512byte units | |
555 | */ | |
556 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 557 | } |
aa9c2669 | 558 | |
821a868a TM |
559 | if (nfsi->cache_validity != 0) |
560 | nfsi->cache_validity |= NFS_INO_REVAL_FORCED; | |
561 | ||
aa9c2669 DQ |
562 | nfs_setsecurity(inode, fattr, label); |
563 | ||
1da177e4 | 564 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 565 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 566 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 567 | |
f1fe29b4 | 568 | nfs_fscache_init_inode(inode); |
ef79c097 | 569 | |
1da177e4 | 570 | unlock_new_inode(inode); |
26fde4df N |
571 | } else { |
572 | int err = nfs_refresh_inode(inode, fattr); | |
573 | if (err < 0) { | |
574 | iput(inode); | |
575 | inode = ERR_PTR(err); | |
576 | goto out_no_inode; | |
577 | } | |
578 | } | |
1e8968c5 | 579 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 580 | inode->i_sb->s_id, |
1e8968c5 | 581 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 582 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
583 | atomic_read(&inode->i_count)); |
584 | ||
585 | out: | |
586 | return inode; | |
587 | ||
588 | out_no_inode: | |
03f28e3a | 589 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
590 | goto out; |
591 | } | |
89d77c8f | 592 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 593 | |
536e43d1 | 594 | #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 |
595 | |
596 | int | |
597 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
598 | { | |
2b0143b5 | 599 | struct inode *inode = d_inode(dentry); |
987f8dfc | 600 | struct nfs_fattr *fattr; |
ae57ca0f | 601 | int error = 0; |
1da177e4 | 602 | |
91d5b470 CL |
603 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
604 | ||
188b95dd JL |
605 | /* skip mode change if it's just for clearing setuid/setgid */ |
606 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
607 | attr->ia_valid &= ~ATTR_MODE; | |
608 | ||
1da177e4 | 609 | if (attr->ia_valid & ATTR_SIZE) { |
08a899d5 CH |
610 | BUG_ON(!S_ISREG(inode->i_mode)); |
611 | ||
ae57ca0f KM |
612 | error = inode_newsize_ok(inode, attr->ia_size); |
613 | if (error) | |
614 | return error; | |
615 | ||
616 | if (attr->ia_size == i_size_read(inode)) | |
1da177e4 LT |
617 | attr->ia_valid &= ~ATTR_SIZE; |
618 | } | |
619 | ||
620 | /* Optimization: if the end result is no change, don't RPC */ | |
621 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 622 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
623 | return 0; |
624 | ||
f4ce1299 TM |
625 | trace_nfs_setattr_enter(inode); |
626 | ||
755c1e20 | 627 | /* Write all dirty data */ |
4d346bea TM |
628 | if (S_ISREG(inode->i_mode)) |
629 | nfs_sync_inode(inode); | |
987f8dfc TM |
630 | |
631 | fattr = nfs_alloc_fattr(); | |
ae57ca0f KM |
632 | if (fattr == NULL) { |
633 | error = -ENOMEM; | |
987f8dfc | 634 | goto out; |
ae57ca0f KM |
635 | } |
636 | ||
987f8dfc | 637 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 638 | if (error == 0) |
aa9c2669 | 639 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
640 | nfs_free_fattr(fattr); |
641 | out: | |
f4ce1299 | 642 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
643 | return error; |
644 | } | |
ddda8e0a | 645 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 646 | |
a3d01454 TM |
647 | /** |
648 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
649 | * @inode: inode of the file used | |
650 | * @offset: file offset to start truncating | |
651 | * | |
652 | * This is a copy of the common vmtruncate, but with the locking | |
653 | * corrected to take into account the fact that NFS requires | |
654 | * inode->i_size to be updated under the inode->i_lock. | |
f044636d | 655 | * Note: must be called with inode->i_lock held! |
a3d01454 TM |
656 | */ |
657 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
658 | { | |
c08d3b0e | 659 | int err; |
a3d01454 | 660 | |
c08d3b0e | 661 | err = inode_newsize_ok(inode, offset); |
662 | if (err) | |
663 | goto out; | |
a3d01454 | 664 | |
c08d3b0e | 665 | i_size_write(inode, offset); |
6edf9609 TM |
666 | /* Optimisation */ |
667 | if (offset == 0) | |
1c341b77 TM |
668 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_DATA | |
669 | NFS_INO_DATA_INVAL_DEFER); | |
f6cdfa6d | 670 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE; |
c08d3b0e | 671 | |
f044636d | 672 | spin_unlock(&inode->i_lock); |
7caef267 | 673 | truncate_pagecache(inode, offset); |
f044636d | 674 | spin_lock(&inode->i_lock); |
c08d3b0e | 675 | out: |
676 | return err; | |
a3d01454 TM |
677 | } |
678 | ||
65e4308d TM |
679 | /** |
680 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
681 | * @inode: pointer to struct inode | |
682 | * @attr: pointer to struct iattr | |
16e14375 | 683 | * @fattr: pointer to struct nfs_fattr |
65e4308d TM |
684 | * |
685 | * Note: we do this in the *proc.c in order to ensure that | |
686 | * it works for things like exclusive creates too. | |
687 | */ | |
f044636d TM |
688 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, |
689 | struct nfs_fattr *fattr) | |
65e4308d | 690 | { |
f044636d TM |
691 | /* Barrier: bump the attribute generation count. */ |
692 | nfs_fattr_set_barrier(fattr); | |
693 | ||
694 | spin_lock(&inode->i_lock); | |
695 | NFS_I(inode)->attr_gencount = fattr->gencount; | |
6a97d02d TM |
696 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
697 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); | |
698 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); | |
699 | nfs_vmtruncate(inode, attr->ia_size); | |
700 | } | |
65e4308d | 701 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
6a97d02d | 702 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME; |
1da177e4 | 703 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
704 | int mode = attr->ia_mode & S_IALLUGO; |
705 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
706 | inode->i_mode = mode; |
707 | } | |
708 | if ((attr->ia_valid & ATTR_UID) != 0) | |
709 | inode->i_uid = attr->ia_uid; | |
710 | if ((attr->ia_valid & ATTR_GID) != 0) | |
711 | inode->i_gid = attr->ia_gid; | |
6a97d02d | 712 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
e86d5a02 | 713 | inode->i_ctime = fattr->ctime; |
6a97d02d TM |
714 | else |
715 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
716 | | NFS_INO_INVALID_CTIME); | |
6edf9609 TM |
717 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
718 | | NFS_INO_INVALID_ACL); | |
65e4308d | 719 | } |
6a97d02d TM |
720 | if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) { |
721 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME | |
722 | | NFS_INO_INVALID_CTIME); | |
723 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) | |
e86d5a02 | 724 | inode->i_atime = fattr->atime; |
6a97d02d TM |
725 | else if (attr->ia_valid & ATTR_ATIME_SET) |
726 | inode->i_atime = attr->ia_atime; | |
727 | else | |
728 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); | |
729 | ||
730 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
e86d5a02 | 731 | inode->i_ctime = fattr->ctime; |
6a97d02d TM |
732 | else |
733 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
734 | | NFS_INO_INVALID_CTIME); | |
735 | } | |
736 | if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) { | |
737 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME | |
738 | | NFS_INO_INVALID_CTIME); | |
739 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
e86d5a02 | 740 | inode->i_mtime = fattr->mtime; |
6a97d02d TM |
741 | else if (attr->ia_valid & ATTR_MTIME_SET) |
742 | inode->i_mtime = attr->ia_mtime; | |
743 | else | |
744 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); | |
745 | ||
746 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
e86d5a02 | 747 | inode->i_ctime = fattr->ctime; |
6a97d02d TM |
748 | else |
749 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
750 | | NFS_INO_INVALID_CTIME); | |
65e4308d | 751 | } |
616c3196 JL |
752 | if (fattr->valid) |
753 | nfs_update_inode(inode, fattr); | |
f044636d | 754 | spin_unlock(&inode->i_lock); |
1da177e4 | 755 | } |
ddda8e0a | 756 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 757 | |
1bcf4c5c | 758 | static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry) |
311324ad TM |
759 | { |
760 | struct dentry *parent; | |
761 | ||
1bcf4c5c TM |
762 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) |
763 | return; | |
311324ad | 764 | parent = dget_parent(dentry); |
2b0143b5 | 765 | nfs_force_use_readdirplus(d_inode(parent)); |
311324ad TM |
766 | dput(parent); |
767 | } | |
768 | ||
1bcf4c5c TM |
769 | static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry) |
770 | { | |
771 | struct dentry *parent; | |
772 | ||
773 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) | |
774 | return; | |
775 | parent = dget_parent(dentry); | |
776 | nfs_advise_use_readdirplus(d_inode(parent)); | |
777 | dput(parent); | |
778 | } | |
779 | ||
311324ad TM |
780 | static bool nfs_need_revalidate_inode(struct inode *inode) |
781 | { | |
782 | if (NFS_I(inode)->cache_validity & | |
783 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
784 | return true; | |
785 | if (nfs_attribute_cache_expired(inode)) | |
786 | return true; | |
787 | return false; | |
788 | } | |
789 | ||
a528d35e DH |
790 | int nfs_getattr(const struct path *path, struct kstat *stat, |
791 | u32 request_mask, unsigned int query_flags) | |
1da177e4 | 792 | { |
a528d35e | 793 | struct inode *inode = d_inode(path->dentry); |
9ccee940 TM |
794 | struct nfs_server *server = NFS_SERVER(inode); |
795 | unsigned long cache_validity; | |
16caf5b6 | 796 | int err = 0; |
9ccee940 TM |
797 | bool force_sync = query_flags & AT_STATX_FORCE_SYNC; |
798 | bool do_update = false; | |
1da177e4 | 799 | |
f4ce1299 | 800 | trace_nfs_getattr_enter(inode); |
9ccee940 | 801 | |
ac7cbb22 TM |
802 | if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) { |
803 | nfs_readdirplus_parent_cache_hit(path->dentry); | |
9ccee940 | 804 | goto out_no_update; |
ac7cbb22 | 805 | } |
9ccee940 | 806 | |
acdc53b2 | 807 | /* Flush out writes to the server in order to update c/mtime. */ |
9ccee940 TM |
808 | if ((request_mask & (STATX_CTIME|STATX_MTIME)) && |
809 | S_ISREG(inode->i_mode)) { | |
79566ef0 | 810 | err = filemap_write_and_wait(inode->i_mapping); |
acdc53b2 TM |
811 | if (err) |
812 | goto out; | |
28c494c5 | 813 | } |
fc33a7bb CH |
814 | |
815 | /* | |
816 | * We may force a getattr if the user cares about atime. | |
817 | * | |
818 | * Note that we only have to check the vfsmount flags here: | |
819 | * - NFS always sets S_NOATIME by so checking it would give a | |
820 | * bogus result | |
1751e8a6 | 821 | * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is |
fc33a7bb CH |
822 | * no point in checking those. |
823 | */ | |
a528d35e DH |
824 | if ((path->mnt->mnt_flags & MNT_NOATIME) || |
825 | ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
9ccee940 TM |
826 | request_mask &= ~STATX_ATIME; |
827 | ||
828 | /* Is the user requesting attributes that might need revalidation? */ | |
829 | if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME| | |
830 | STATX_MTIME|STATX_UID|STATX_GID| | |
831 | STATX_SIZE|STATX_BLOCKS))) | |
832 | goto out_no_revalidate; | |
833 | ||
834 | /* Check whether the cached attributes are stale */ | |
835 | do_update |= force_sync || nfs_attribute_cache_expired(inode); | |
836 | cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
837 | do_update |= cache_validity & | |
838 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL); | |
839 | if (request_mask & STATX_ATIME) | |
840 | do_update |= cache_validity & NFS_INO_INVALID_ATIME; | |
841 | if (request_mask & (STATX_CTIME|STATX_MTIME)) | |
842 | do_update |= cache_validity & NFS_INO_REVAL_PAGECACHE; | |
3a39e778 ZB |
843 | if (request_mask & STATX_BLOCKS) |
844 | do_update |= cache_validity & NFS_INO_INVALID_BLOCKS; | |
9ccee940 TM |
845 | if (do_update) { |
846 | /* Update the attribute cache */ | |
59b86d85 HT |
847 | if (!(server->flags & NFS_MOUNT_NOAC)) |
848 | nfs_readdirplus_parent_cache_miss(path->dentry); | |
849 | else | |
850 | nfs_readdirplus_parent_cache_hit(path->dentry); | |
311324ad | 851 | err = __nfs_revalidate_inode(server, inode); |
9ccee940 TM |
852 | if (err) |
853 | goto out; | |
1bcf4c5c | 854 | } else |
a528d35e | 855 | nfs_readdirplus_parent_cache_hit(path->dentry); |
9ccee940 TM |
856 | out_no_revalidate: |
857 | /* Only return attributes that were revalidated. */ | |
858 | stat->result_mask &= request_mask; | |
859 | out_no_update: | |
0d56a451 | 860 | generic_fillattr(&init_user_ns, inode, stat); |
9ccee940 TM |
861 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
862 | if (S_ISDIR(inode->i_mode)) | |
863 | stat->blksize = NFS_SERVER(inode)->dtsize; | |
acdc53b2 | 864 | out: |
f4ce1299 | 865 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
866 | return err; |
867 | } | |
ddda8e0a | 868 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 869 | |
f11ac8db TM |
870 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
871 | { | |
2f62b5aa | 872 | refcount_set(&l_ctx->count, 1); |
d51fdb87 | 873 | l_ctx->lockowner = current->files; |
f11ac8db | 874 | INIT_LIST_HEAD(&l_ctx->list); |
210c7c17 | 875 | atomic_set(&l_ctx->io_count, 0); |
f11ac8db TM |
876 | } |
877 | ||
878 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
879 | { | |
1db97eaa | 880 | struct nfs_lock_context *pos; |
f11ac8db | 881 | |
1db97eaa | 882 | list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) { |
d51fdb87 | 883 | if (pos->lockowner != current->files) |
f11ac8db | 884 | continue; |
1db97eaa TM |
885 | if (refcount_inc_not_zero(&pos->count)) |
886 | return pos; | |
887 | } | |
f11ac8db TM |
888 | return NULL; |
889 | } | |
890 | ||
891 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
892 | { | |
893 | struct nfs_lock_context *res, *new = NULL; | |
2b0143b5 | 894 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db | 895 | |
1db97eaa | 896 | rcu_read_lock(); |
f11ac8db | 897 | res = __nfs_find_lock_context(ctx); |
1db97eaa | 898 | rcu_read_unlock(); |
f11ac8db | 899 | if (res == NULL) { |
f11ac8db TM |
900 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
901 | if (new == NULL) | |
b3c54de6 | 902 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
903 | nfs_init_lock_context(new); |
904 | spin_lock(&inode->i_lock); | |
905 | res = __nfs_find_lock_context(ctx); | |
906 | if (res == NULL) { | |
15494511 TM |
907 | new->open_context = get_nfs_open_context(ctx); |
908 | if (new->open_context) { | |
909 | list_add_tail_rcu(&new->list, | |
910 | &ctx->lock_context.list); | |
911 | res = new; | |
912 | new = NULL; | |
913 | } else | |
914 | res = ERR_PTR(-EBADF); | |
f11ac8db | 915 | } |
1db97eaa TM |
916 | spin_unlock(&inode->i_lock); |
917 | kfree(new); | |
f11ac8db | 918 | } |
f11ac8db TM |
919 | return res; |
920 | } | |
1c6dcbe5 | 921 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
922 | |
923 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
924 | { | |
925 | struct nfs_open_context *ctx = l_ctx->open_context; | |
2b0143b5 | 926 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db | 927 | |
2f62b5aa | 928 | if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock)) |
f11ac8db | 929 | return; |
1db97eaa | 930 | list_del_rcu(&l_ctx->list); |
f11ac8db | 931 | spin_unlock(&inode->i_lock); |
15494511 | 932 | put_nfs_open_context(ctx); |
1db97eaa | 933 | kfree_rcu(l_ctx, rcu_head); |
f11ac8db | 934 | } |
1c6dcbe5 | 935 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 936 | |
7fe5c398 TM |
937 | /** |
938 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
939 | * @ctx: pointer to context | |
940 | * @is_sync: is this a synchronous close | |
941 | * | |
5cf9d706 TM |
942 | * Ensure that the attributes are up to date if we're mounted |
943 | * with close-to-open semantics and we have cached data that will | |
944 | * need to be revalidated on open. | |
7fe5c398 TM |
945 | */ |
946 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
947 | { | |
5cf9d706 | 948 | struct nfs_inode *nfsi; |
7fe5c398 TM |
949 | struct inode *inode; |
950 | struct nfs_server *server; | |
951 | ||
952 | if (!(ctx->mode & FMODE_WRITE)) | |
953 | return; | |
954 | if (!is_sync) | |
955 | return; | |
2b0143b5 | 956 | inode = d_inode(ctx->dentry); |
58ff4184 TM |
957 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
958 | return; | |
5cf9d706 TM |
959 | nfsi = NFS_I(inode); |
960 | if (inode->i_mapping->nrpages == 0) | |
961 | return; | |
962 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
963 | return; | |
964 | if (!list_empty(&nfsi->open_files)) | |
7fe5c398 TM |
965 | return; |
966 | server = NFS_SERVER(inode); | |
967 | if (server->flags & NFS_MOUNT_NOCTO) | |
968 | return; | |
969 | nfs_revalidate_inode(server, inode); | |
970 | } | |
ddda8e0a | 971 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 972 | |
532d4def N |
973 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, |
974 | fmode_t f_mode, | |
975 | struct file *filp) | |
1da177e4 LT |
976 | { |
977 | struct nfs_open_context *ctx; | |
978 | ||
f52720ca | 979 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1d179d6b | 980 | if (!ctx) |
5ede7b1c | 981 | return ERR_PTR(-ENOMEM); |
5ede7b1c AV |
982 | nfs_sb_active(dentry->d_sb); |
983 | ctx->dentry = dget(dentry); | |
1d179d6b TM |
984 | if (filp) |
985 | ctx->cred = get_cred(filp->f_cred); | |
986 | else | |
987 | ctx->cred = get_current_cred(); | |
ddf529ee | 988 | ctx->ll_cred = NULL; |
5ede7b1c AV |
989 | ctx->state = NULL; |
990 | ctx->mode = f_mode; | |
991 | ctx->flags = 0; | |
992 | ctx->error = 0; | |
532d4def | 993 | ctx->flock_owner = (fl_owner_t)filp; |
5ede7b1c AV |
994 | nfs_init_lock_context(&ctx->lock_context); |
995 | ctx->lock_context.open_context = ctx; | |
996 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 997 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
998 | return ctx; |
999 | } | |
89d77c8f | 1000 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
1001 | |
1002 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
1003 | { | |
0de43976 TM |
1004 | if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count)) |
1005 | return ctx; | |
1006 | return NULL; | |
1da177e4 | 1007 | } |
89d77c8f | 1008 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 1009 | |
7fe5c398 | 1010 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 1011 | { |
2b0143b5 | 1012 | struct inode *inode = d_inode(ctx->dentry); |
3d4ff43d | 1013 | struct super_block *sb = ctx->dentry->d_sb; |
3bec63db | 1014 | |
0de43976 TM |
1015 | if (!refcount_dec_and_test(&ctx->lock_context.count)) |
1016 | return; | |
5c78f58e | 1017 | if (!list_empty(&ctx->list)) { |
0de43976 TM |
1018 | spin_lock(&inode->i_lock); |
1019 | list_del_rcu(&ctx->list); | |
ef84303e | 1020 | spin_unlock(&inode->i_lock); |
0de43976 | 1021 | } |
5c78f58e TM |
1022 | if (inode != NULL) |
1023 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
a52458b4 | 1024 | put_cred(ctx->cred); |
3d4ff43d | 1025 | dput(ctx->dentry); |
322b2b90 | 1026 | nfs_sb_deactive(sb); |
ddf529ee | 1027 | put_rpccred(ctx->ll_cred); |
82be417a | 1028 | kfree(ctx->mdsthreshold); |
0de43976 | 1029 | kfree_rcu(ctx, rcu_head); |
3bec63db TM |
1030 | } |
1031 | ||
a49c3c77 TM |
1032 | void put_nfs_open_context(struct nfs_open_context *ctx) |
1033 | { | |
1034 | __put_nfs_open_context(ctx, 0); | |
1035 | } | |
89d77c8f | 1036 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 1037 | |
4eae5014 TM |
1038 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
1039 | { | |
1040 | __put_nfs_open_context(ctx, 1); | |
1041 | } | |
1042 | ||
1da177e4 LT |
1043 | /* |
1044 | * Ensure that mmap has a recent RPC credential for use when writing out | |
1045 | * shared pages | |
1046 | */ | |
c45ffdd2 | 1047 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 1048 | { |
2b0143b5 | 1049 | struct inode *inode = d_inode(ctx->dentry); |
1da177e4 LT |
1050 | struct nfs_inode *nfsi = NFS_I(inode); |
1051 | ||
1da177e4 | 1052 | spin_lock(&inode->i_lock); |
1c341b77 TM |
1053 | if (list_empty(&nfsi->open_files) && |
1054 | (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER)) | |
1055 | nfsi->cache_validity |= NFS_INO_INVALID_DATA | | |
1056 | NFS_INO_REVAL_FORCED; | |
0de43976 | 1057 | list_add_tail_rcu(&ctx->list, &nfsi->open_files); |
1da177e4 LT |
1058 | spin_unlock(&inode->i_lock); |
1059 | } | |
c45ffdd2 TM |
1060 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
1061 | ||
1062 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
1063 | { | |
1064 | filp->private_data = get_nfs_open_context(ctx); | |
1065 | if (list_empty(&ctx->list)) | |
1066 | nfs_inode_attach_open_context(ctx); | |
1067 | } | |
89d77c8f | 1068 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 1069 | |
d530838b TM |
1070 | /* |
1071 | * Given an inode, search for an open context with the desired characteristics | |
1072 | */ | |
a52458b4 | 1073 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode) |
1da177e4 LT |
1074 | { |
1075 | struct nfs_inode *nfsi = NFS_I(inode); | |
1076 | struct nfs_open_context *pos, *ctx = NULL; | |
1077 | ||
0de43976 TM |
1078 | rcu_read_lock(); |
1079 | list_for_each_entry_rcu(pos, &nfsi->open_files, list) { | |
65f51603 | 1080 | if (cred != NULL && cred_fscmp(pos->cred, cred) != 0) |
d530838b | 1081 | continue; |
1544fa0f TM |
1082 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
1083 | continue; | |
1084 | ctx = get_nfs_open_context(pos); | |
0de43976 TM |
1085 | if (ctx) |
1086 | break; | |
1da177e4 | 1087 | } |
0de43976 | 1088 | rcu_read_unlock(); |
1da177e4 LT |
1089 | return ctx; |
1090 | } | |
1091 | ||
aff8d8dc | 1092 | void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 1093 | { |
cd3758e3 | 1094 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
1095 | |
1096 | if (ctx) { | |
2b0143b5 | 1097 | struct inode *inode = d_inode(ctx->dentry); |
c45ffdd2 | 1098 | |
0bcbf039 PT |
1099 | /* |
1100 | * We fatal error on write before. Try to writeback | |
1101 | * every page again. | |
1102 | */ | |
1103 | if (ctx->error < 0) | |
1104 | invalidate_inode_pages2(inode->i_mapping); | |
1da177e4 | 1105 | filp->private_data = NULL; |
4eae5014 | 1106 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
1107 | } |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * These allocate and release file read/write context information. | |
1112 | */ | |
1113 | int nfs_open(struct inode *inode, struct file *filp) | |
1114 | { | |
1115 | struct nfs_open_context *ctx; | |
1da177e4 | 1116 | |
532d4def | 1117 | ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp); |
5ede7b1c AV |
1118 | if (IS_ERR(ctx)) |
1119 | return PTR_ERR(ctx); | |
1da177e4 LT |
1120 | nfs_file_set_open_context(filp, ctx); |
1121 | put_nfs_open_context(ctx); | |
f1fe29b4 | 1122 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
1123 | return 0; |
1124 | } | |
44942b4e | 1125 | EXPORT_SYMBOL_GPL(nfs_open); |
1da177e4 | 1126 | |
1da177e4 LT |
1127 | /* |
1128 | * This function is called whenever some part of NFS notices that | |
1129 | * the cached attributes have to be refreshed. | |
1130 | */ | |
1131 | int | |
1132 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1133 | { | |
1134 | int status = -ESTALE; | |
1775fd3e | 1135 | struct nfs4_label *label = NULL; |
a3cba2aa | 1136 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 1137 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1138 | |
1e8968c5 NV |
1139 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
1140 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 1141 | |
f4ce1299 TM |
1142 | trace_nfs_revalidate_inode_enter(inode); |
1143 | ||
85233a7a | 1144 | if (is_bad_inode(inode)) |
691beb13 | 1145 | goto out; |
1da177e4 | 1146 | if (NFS_STALE(inode)) |
412d582e | 1147 | goto out; |
7fdc49c4 | 1148 | |
ac46bd37 TM |
1149 | /* pNFS: Attributes aren't updated until we layoutcommit */ |
1150 | if (S_ISREG(inode->i_mode)) { | |
1151 | status = pnfs_sync_inode(inode, false); | |
1152 | if (status) | |
1153 | goto out; | |
1154 | } | |
1155 | ||
a3cba2aa TM |
1156 | status = -ENOMEM; |
1157 | fattr = nfs_alloc_fattr(); | |
1158 | if (fattr == NULL) | |
1159 | goto out; | |
1160 | ||
691beb13 | 1161 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
1162 | |
1163 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
1164 | if (IS_ERR(label)) { | |
1165 | status = PTR_ERR(label); | |
1166 | goto out; | |
1167 | } | |
1168 | ||
a841b54d TM |
1169 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, |
1170 | label, inode); | |
1da177e4 | 1171 | if (status != 0) { |
1e8968c5 | 1172 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 1173 | inode->i_sb->s_id, |
1e8968c5 | 1174 | (unsigned long long)NFS_FILEID(inode), status); |
c74dfe97 TM |
1175 | switch (status) { |
1176 | case -ETIMEDOUT: | |
1177 | /* A soft timeout occurred. Use cached information? */ | |
1178 | if (server->flags & NFS_MOUNT_SOFTREVAL) | |
1179 | status = 0; | |
1180 | break; | |
1181 | case -ESTALE: | |
1da177e4 | 1182 | if (!S_ISDIR(inode->i_mode)) |
93ce4af7 TM |
1183 | nfs_set_inode_stale(inode); |
1184 | else | |
1185 | nfs_zap_caches(inode); | |
1da177e4 | 1186 | } |
14c43f76 | 1187 | goto err_out; |
1da177e4 LT |
1188 | } |
1189 | ||
a3cba2aa | 1190 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 1191 | if (status) { |
1e8968c5 | 1192 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 1193 | inode->i_sb->s_id, |
1e8968c5 | 1194 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 1195 | goto err_out; |
1da177e4 | 1196 | } |
55296809 | 1197 | |
24aa1fe6 | 1198 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1199 | nfs_zap_acl_cache(inode); |
55296809 | 1200 | |
3da580aa JL |
1201 | nfs_setsecurity(inode, fattr, label); |
1202 | ||
1e8968c5 | 1203 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 1204 | inode->i_sb->s_id, |
1e8968c5 | 1205 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 1206 | |
14c43f76 DQ |
1207 | err_out: |
1208 | nfs4_label_free(label); | |
1209 | out: | |
a3cba2aa | 1210 | nfs_free_fattr(fattr); |
f4ce1299 | 1211 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
1212 | return status; |
1213 | } | |
1214 | ||
43f291cd | 1215 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 1216 | { |
b4d2314b | 1217 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 1218 | return 0; |
d7cf8dd0 | 1219 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
1220 | } |
1221 | ||
1222 | /** | |
1223 | * nfs_revalidate_inode - Revalidate the inode attributes | |
302fad7b TM |
1224 | * @server: pointer to nfs_server struct |
1225 | * @inode: pointer to inode struct | |
1da177e4 LT |
1226 | * |
1227 | * Updates inode attribute information by retrieving the data from the server. | |
1228 | */ | |
1229 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1230 | { | |
311324ad | 1231 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1232 | return NFS_STALE(inode) ? -ESTALE : 0; |
1233 | return __nfs_revalidate_inode(server, inode); | |
1234 | } | |
1c606fb7 | 1235 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1236 | |
1cda707d | 1237 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 | 1238 | { |
f8806c84 TM |
1239 | int ret; |
1240 | ||
717d44e8 | 1241 | if (mapping->nrpages != 0) { |
f8806c84 TM |
1242 | if (S_ISREG(inode->i_mode)) { |
1243 | ret = nfs_sync_mapping(mapping); | |
1244 | if (ret < 0) | |
1245 | return ret; | |
1246 | } | |
1247 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1248 | if (ret < 0) |
1249 | return ret; | |
1250 | } | |
717d44e8 | 1251 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1252 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1253 | |
1e8968c5 NV |
1254 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1255 | inode->i_sb->s_id, | |
1256 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1257 | return 0; |
1258 | } | |
1259 | ||
1cd9cb05 | 1260 | bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
b4b1eadf | 1261 | { |
61540bf6 TM |
1262 | return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) || |
1263 | NFS_STALE(inode); | |
b4b1eadf TM |
1264 | } |
1265 | ||
0d0def49 AV |
1266 | int nfs_revalidate_mapping_rcu(struct inode *inode) |
1267 | { | |
1268 | struct nfs_inode *nfsi = NFS_I(inode); | |
1269 | unsigned long *bitlock = &nfsi->flags; | |
1270 | int ret = 0; | |
1271 | ||
1272 | if (IS_SWAPFILE(inode)) | |
1273 | goto out; | |
1274 | if (nfs_mapping_need_revalidate_inode(inode)) { | |
1275 | ret = -ECHILD; | |
1276 | goto out; | |
1277 | } | |
1278 | spin_lock(&inode->i_lock); | |
1279 | if (test_bit(NFS_INO_INVALIDATING, bitlock) || | |
1280 | (nfsi->cache_validity & NFS_INO_INVALID_DATA)) | |
1281 | ret = -ECHILD; | |
1282 | spin_unlock(&inode->i_lock); | |
1283 | out: | |
1284 | return ret; | |
1285 | } | |
1286 | ||
717d44e8 | 1287 | /** |
be527494 | 1288 | * nfs_revalidate_mapping - Revalidate the pagecache |
302fad7b TM |
1289 | * @inode: pointer to host inode |
1290 | * @mapping: pointer to mapping | |
717d44e8 | 1291 | */ |
be527494 TM |
1292 | int nfs_revalidate_mapping(struct inode *inode, |
1293 | struct address_space *mapping) | |
717d44e8 TM |
1294 | { |
1295 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1296 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1297 | int ret = 0; |
dc59250c | 1298 | |
29418aa4 MG |
1299 | /* swapfiles are not supposed to be shared. */ |
1300 | if (IS_SWAPFILE(inode)) | |
1301 | goto out; | |
1302 | ||
b4b1eadf | 1303 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1304 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1305 | if (ret < 0) | |
1306 | goto out; | |
7d52e862 | 1307 | } |
d529ef83 JL |
1308 | |
1309 | /* | |
1310 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1311 | * invalidations that come in while we're shooting down the mappings | |
1312 | * are respected. But, that leaves a race window where one revalidator | |
1313 | * can clear the flag, and then another checks it before the mapping | |
1314 | * gets invalidated. Fix that by serializing access to this part of | |
1315 | * the function. | |
1316 | * | |
1317 | * At the same time, we need to allow other tasks to see whether we | |
1318 | * might be in the middle of invalidating the pages, so we only set | |
1319 | * the bit lock here if it looks like we're going to be doing that. | |
1320 | */ | |
1321 | for (;;) { | |
74316201 N |
1322 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1323 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1324 | if (ret) |
1325 | goto out; | |
17dfeb91 TM |
1326 | spin_lock(&inode->i_lock); |
1327 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1328 | spin_unlock(&inode->i_lock); | |
1329 | continue; | |
1330 | } | |
1331 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1332 | break; |
d529ef83 | 1333 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1334 | goto out; |
f4ce1299 TM |
1335 | } |
1336 | ||
17dfeb91 | 1337 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1338 | smp_wmb(); |
1c341b77 TM |
1339 | nfsi->cache_validity &= ~(NFS_INO_INVALID_DATA| |
1340 | NFS_INO_DATA_INVAL_DEFER); | |
17dfeb91 TM |
1341 | spin_unlock(&inode->i_lock); |
1342 | trace_nfs_invalidate_mapping_enter(inode); | |
be527494 | 1343 | ret = nfs_invalidate_mapping(inode, mapping); |
17dfeb91 TM |
1344 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1345 | ||
d529ef83 | 1346 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1347 | smp_mb__after_atomic(); |
d529ef83 | 1348 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1349 | out: |
44b11874 | 1350 | return ret; |
7d52e862 TM |
1351 | } |
1352 | ||
ca0daa27 | 1353 | static bool nfs_file_has_writers(struct nfs_inode *nfsi) |
874f9463 | 1354 | { |
ca0daa27 TM |
1355 | struct inode *inode = &nfsi->vfs_inode; |
1356 | ||
ca0daa27 TM |
1357 | if (!S_ISREG(inode->i_mode)) |
1358 | return false; | |
1359 | if (list_empty(&nfsi->open_files)) | |
1360 | return false; | |
6ba0c4e5 | 1361 | return inode_is_open_for_write(inode); |
874f9463 TM |
1362 | } |
1363 | ||
651b0e70 | 1364 | static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi) |
874f9463 | 1365 | { |
651b0e70 | 1366 | return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi); |
874f9463 TM |
1367 | } |
1368 | ||
783b194c | 1369 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 | 1370 | { |
e86d5a02 | 1371 | struct timespec64 ts; |
95582b00 | 1372 | |
9e6e70f8 TM |
1373 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1374 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
c472c07b | 1375 | && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) { |
1eb5d98f | 1376 | inode_set_iversion_raw(inode, fattr->change_attr); |
70ca8852 | 1377 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1378 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
0f44da51 FL |
1379 | else if (nfs_server_capable(inode, NFS_CAP_XATTR)) |
1380 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR); | |
70ca8852 | 1381 | } |
a895b4a1 | 1382 | /* If we have atomic WCC data, we may update some attributes */ |
e86d5a02 | 1383 | ts = inode->i_ctime; |
9e6e70f8 TM |
1384 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1385 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
e86d5a02 TM |
1386 | && timespec64_equal(&ts, &fattr->pre_ctime)) { |
1387 | inode->i_ctime = fattr->ctime; | |
27dc1cd3 | 1388 | } |
9e6e70f8 | 1389 | |
e86d5a02 | 1390 | ts = inode->i_mtime; |
9e6e70f8 TM |
1391 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) |
1392 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
e86d5a02 TM |
1393 | && timespec64_equal(&ts, &fattr->pre_mtime)) { |
1394 | inode->i_mtime = fattr->mtime; | |
27dc1cd3 | 1395 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1396 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
a895b4a1 | 1397 | } |
9e6e70f8 TM |
1398 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1399 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1400 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
a6b6d5b8 | 1401 | && !nfs_have_writebacks(inode)) { |
27dc1cd3 | 1402 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
27dc1cd3 | 1403 | } |
a895b4a1 TM |
1404 | } |
1405 | ||
1da177e4 | 1406 | /** |
33801147 | 1407 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
302fad7b TM |
1408 | * @inode: pointer to inode |
1409 | * @fattr: updated attributes | |
1da177e4 LT |
1410 | * |
1411 | * Verifies the attribute cache. If we have just changed the attributes, | |
1412 | * so that fattr carries weak cache consistency data, then it may | |
1413 | * also update the ctime/mtime/change_attribute. | |
1414 | */ | |
33801147 | 1415 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1416 | { |
1417 | struct nfs_inode *nfsi = NFS_I(inode); | |
1418 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1419 | unsigned long invalid = 0; |
e86d5a02 | 1420 | struct timespec64 ts; |
dc59250c | 1421 | |
4ebe83af | 1422 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
01da47bd | 1423 | return 0; |
4ebe83af | 1424 | |
eb3d8f42 TM |
1425 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) { |
1426 | /* Only a mounted-on-fileid? Just exit */ | |
1427 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1428 | return 0; | |
ca62b9c3 | 1429 | /* Has the inode gone and changed behind our back? */ |
eb3d8f42 | 1430 | } else if (nfsi->fileid != fattr->fileid) { |
7e10cc25 TM |
1431 | /* Is this perhaps the mounted-on fileid? */ |
1432 | if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) && | |
1433 | nfsi->fileid == fattr->mounted_on_fileid) | |
1434 | return 0; | |
cc89684c | 1435 | return -ESTALE; |
7e10cc25 | 1436 | } |
9e6e70f8 | 1437 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
cc89684c | 1438 | return -ESTALE; |
ca62b9c3 | 1439 | |
7e10cc25 | 1440 | |
651b0e70 | 1441 | if (!nfs_file_has_buffered_writers(nfsi)) { |
ca0daa27 | 1442 | /* Verify a few of the more important attributes */ |
c472c07b | 1443 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr)) |
16e14375 TM |
1444 | invalid |= NFS_INO_INVALID_CHANGE |
1445 | | NFS_INO_REVAL_PAGECACHE; | |
1da177e4 | 1446 | |
e86d5a02 TM |
1447 | ts = inode->i_mtime; |
1448 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime)) | |
16e14375 | 1449 | invalid |= NFS_INO_INVALID_MTIME; |
ca62b9c3 | 1450 | |
e86d5a02 TM |
1451 | ts = inode->i_ctime; |
1452 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec64_equal(&ts, &fattr->ctime)) | |
16e14375 | 1453 | invalid |= NFS_INO_INVALID_CTIME; |
ca0daa27 TM |
1454 | |
1455 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { | |
1456 | cur_size = i_size_read(inode); | |
1457 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1458 | if (cur_size != new_isize) | |
16e14375 TM |
1459 | invalid |= NFS_INO_INVALID_SIZE |
1460 | | NFS_INO_REVAL_PAGECACHE; | |
ca0daa27 | 1461 | } |
9e6e70f8 | 1462 | } |
1da177e4 LT |
1463 | |
1464 | /* Have any file permissions changed? */ | |
9e6e70f8 | 1465 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
16e14375 TM |
1466 | invalid |= NFS_INO_INVALID_ACCESS |
1467 | | NFS_INO_INVALID_ACL | |
1468 | | NFS_INO_INVALID_OTHER; | |
9ff593c4 | 1469 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
16e14375 TM |
1470 | invalid |= NFS_INO_INVALID_ACCESS |
1471 | | NFS_INO_INVALID_ACL | |
1472 | | NFS_INO_INVALID_OTHER; | |
9ff593c4 | 1473 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
16e14375 TM |
1474 | invalid |= NFS_INO_INVALID_ACCESS |
1475 | | NFS_INO_INVALID_ACL | |
1476 | | NFS_INO_INVALID_OTHER; | |
1da177e4 LT |
1477 | |
1478 | /* Has the link count changed? */ | |
9e6e70f8 | 1479 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
16e14375 | 1480 | invalid |= NFS_INO_INVALID_OTHER; |
1da177e4 | 1481 | |
e86d5a02 TM |
1482 | ts = inode->i_atime; |
1483 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec64_equal(&ts, &fattr->atime)) | |
2a3f5fd4 TM |
1484 | invalid |= NFS_INO_INVALID_ATIME; |
1485 | ||
1486 | if (invalid != 0) | |
4ebe83af | 1487 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1488 | |
33801147 | 1489 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1490 | return 0; |
1491 | } | |
1492 | ||
ae05f269 | 1493 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1494 | |
1495 | static unsigned long nfs_read_attr_generation_counter(void) | |
1496 | { | |
ae05f269 | 1497 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1498 | } |
1499 | ||
1500 | unsigned long nfs_inc_attr_generation_counter(void) | |
1501 | { | |
ae05f269 | 1502 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 | 1503 | } |
3235b403 | 1504 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
4704f0e2 TM |
1505 | |
1506 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1507 | { | |
1508 | fattr->valid = 0; | |
1509 | fattr->time_start = jiffies; | |
1510 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1511 | fattr->owner_name = NULL; |
1512 | fattr->group_name = NULL; | |
4704f0e2 | 1513 | } |
ddda8e0a | 1514 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1515 | |
140e049c TM |
1516 | /** |
1517 | * nfs_fattr_set_barrier | |
1518 | * @fattr: attributes | |
1519 | * | |
1520 | * Used to set a barrier after an attribute was updated. This | |
1521 | * barrier ensures that older attributes from RPC calls that may | |
1522 | * have raced with our update cannot clobber these new values. | |
1523 | * Note that you are still responsible for ensuring that other | |
1524 | * operations which change the attribute on the server do not | |
1525 | * collide. | |
1526 | */ | |
1527 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) | |
1528 | { | |
1529 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1530 | } | |
1531 | ||
2d36bfde TM |
1532 | struct nfs_fattr *nfs_alloc_fattr(void) |
1533 | { | |
1534 | struct nfs_fattr *fattr; | |
1535 | ||
1536 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1537 | if (fattr != NULL) | |
1538 | nfs_fattr_init(fattr); | |
1539 | return fattr; | |
1540 | } | |
ddda8e0a | 1541 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1542 | |
1543 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1544 | { | |
1545 | struct nfs_fh *fh; | |
1546 | ||
1547 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1548 | if (fh != NULL) | |
1549 | fh->size = 0; | |
1550 | return fh; | |
1551 | } | |
ddda8e0a | 1552 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1553 | |
e27d359e | 1554 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1555 | /* |
1556 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1557 | * in the same way that wireshark does | |
1558 | * | |
1559 | * @fh: file handle | |
1560 | * | |
1561 | * For debugging only. | |
1562 | */ | |
1563 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1564 | { | |
1565 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1566 | * not on the result */ | |
1264a2f0 | 1567 | return nfs_fhandle_hash(fh); |
d8e0539e | 1568 | } |
9e6ee76d | 1569 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1570 | |
1571 | /* | |
20d27e92 CL |
1572 | * _nfs_display_fhandle - display an NFS file handle on the console |
1573 | * | |
1574 | * @fh: file handle to display | |
1575 | * @caption: display caption | |
1576 | * | |
1577 | * For debugging only. | |
1578 | */ | |
20d27e92 CL |
1579 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1580 | { | |
1581 | unsigned short i; | |
1582 | ||
fa68a1ba | 1583 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1584 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1585 | return; | |
1586 | } | |
1587 | ||
d8e0539e WAA |
1588 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1589 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1590 | for (i = 0; i < fh->size; i += 16) { |
1591 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1592 | ||
1593 | switch ((fh->size - i - 1) >> 2) { | |
1594 | case 0: | |
1595 | printk(KERN_DEFAULT " %08x\n", | |
1596 | be32_to_cpup(pos)); | |
1597 | break; | |
1598 | case 1: | |
1599 | printk(KERN_DEFAULT " %08x %08x\n", | |
1600 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1601 | break; | |
1602 | case 2: | |
1603 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1604 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1605 | be32_to_cpup(pos + 2)); | |
1606 | break; | |
1607 | default: | |
1608 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1609 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1610 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1611 | } | |
1612 | } | |
1613 | } | |
9e6ee76d | 1614 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1615 | #endif |
1616 | ||
a10ad176 TM |
1617 | /** |
1618 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
302fad7b TM |
1619 | * @inode: pointer to inode |
1620 | * @fattr: attributes | |
a10ad176 TM |
1621 | * |
1622 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1623 | * attributes got scheduled after another call carrying updated ones. | |
1624 | * | |
1625 | * To do so, the function first assumes that a more recent ctime means | |
1626 | * that the attributes in fattr are newer, however it also attempt to | |
1627 | * catch the case where ctime either didn't change, or went backwards | |
1628 | * (if someone reset the clock on the server) by looking at whether | |
1629 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1630 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1631 | * |
1632 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1633 | * more recent than the ones cached in the inode. | |
1634 | * | |
1635 | */ | |
1636 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1637 | { | |
1638 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1639 | ||
4704f0e2 | 1640 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
4704f0e2 | 1641 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1642 | } |
1643 | ||
1644 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1645 | { | |
f4ce1299 TM |
1646 | int ret; |
1647 | ||
1648 | trace_nfs_refresh_inode_enter(inode); | |
1649 | ||
a10ad176 | 1650 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1651 | ret = nfs_update_inode(inode, fattr); |
1652 | else | |
1653 | ret = nfs_check_inode_attributes(inode, fattr); | |
1654 | ||
1655 | trace_nfs_refresh_inode_exit(inode, ret); | |
1656 | return ret; | |
870a5be8 TM |
1657 | } |
1658 | ||
33801147 TM |
1659 | /** |
1660 | * nfs_refresh_inode - try to update the inode attribute cache | |
302fad7b TM |
1661 | * @inode: pointer to inode |
1662 | * @fattr: updated attributes | |
33801147 TM |
1663 | * |
1664 | * Check that an RPC call that returned attributes has not overlapped with | |
1665 | * other recent updates of the inode metadata, then decide whether it is | |
1666 | * safe to do a full update of the inode attributes, or whether just to | |
1667 | * call nfs_check_inode_attributes. | |
1668 | */ | |
1669 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1670 | { | |
33801147 TM |
1671 | int status; |
1672 | ||
1673 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1674 | return 0; | |
1675 | spin_lock(&inode->i_lock); | |
870a5be8 | 1676 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1677 | spin_unlock(&inode->i_lock); |
ef79c097 | 1678 | |
33801147 TM |
1679 | return status; |
1680 | } | |
ddda8e0a | 1681 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1682 | |
16e14375 TM |
1683 | static int nfs_post_op_update_inode_locked(struct inode *inode, |
1684 | struct nfs_fattr *fattr, unsigned int invalid) | |
d65f557f | 1685 | { |
6edf9609 TM |
1686 | if (S_ISDIR(inode->i_mode)) |
1687 | invalid |= NFS_INO_INVALID_DATA; | |
1688 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1689 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1690 | return 0; | |
1691 | return nfs_refresh_inode_locked(inode, fattr); | |
1692 | } | |
1693 | ||
decf491f TM |
1694 | /** |
1695 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
302fad7b TM |
1696 | * @inode: pointer to inode |
1697 | * @fattr: updated attributes | |
decf491f TM |
1698 | * |
1699 | * After an operation that has changed the inode metadata, mark the | |
1700 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1701 | * |
1702 | * NB: if the server didn't return any post op attributes, this | |
1703 | * function will force the retrieval of attributes before the next | |
1704 | * NFS request. Thus it should be used only for operations that | |
1705 | * are expected to change one or more attributes, to avoid | |
1706 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1707 | */ |
1708 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1709 | { | |
d65f557f | 1710 | int status; |
decf491f | 1711 | |
7668fdbe | 1712 | spin_lock(&inode->i_lock); |
92d64e47 | 1713 | nfs_fattr_set_barrier(fattr); |
16e14375 TM |
1714 | status = nfs_post_op_update_inode_locked(inode, fattr, |
1715 | NFS_INO_INVALID_CHANGE | |
d554168f TM |
1716 | | NFS_INO_INVALID_CTIME |
1717 | | NFS_INO_REVAL_FORCED); | |
7668fdbe | 1718 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1719 | |
870a5be8 | 1720 | return status; |
decf491f | 1721 | } |
1c606fb7 | 1722 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1723 | |
70ca8852 | 1724 | /** |
a08a8cd3 | 1725 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
302fad7b TM |
1726 | * @inode: pointer to inode |
1727 | * @fattr: updated attributes | |
70ca8852 TM |
1728 | * |
1729 | * After an operation that has changed the inode metadata, mark the | |
1730 | * attribute cache as being invalid, then try to update it. Fake up | |
1731 | * weak cache consistency data, if none exist. | |
1732 | * | |
1733 | * This function is mainly designed to be used by the ->write_done() functions. | |
1734 | */ | |
a08a8cd3 | 1735 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
70ca8852 | 1736 | { |
d65f557f TM |
1737 | int status; |
1738 | ||
d65f557f TM |
1739 | /* Don't do a WCC update if these attributes are already stale */ |
1740 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1741 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1742 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1743 | | NFS_ATTR_FATTR_PRESIZE | |
1744 | | NFS_ATTR_FATTR_PREMTIME | |
1745 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1746 | goto out_noforce; |
1747 | } | |
9e6e70f8 TM |
1748 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1749 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
1eb5d98f | 1750 | fattr->pre_change_attr = inode_peek_iversion_raw(inode); |
9e6e70f8 | 1751 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1752 | } |
9e6e70f8 TM |
1753 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1754 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
e86d5a02 | 1755 | fattr->pre_ctime = inode->i_ctime; |
9e6e70f8 TM |
1756 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1757 | } | |
1758 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1759 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
e86d5a02 | 1760 | fattr->pre_mtime = inode->i_mtime; |
9e6e70f8 TM |
1761 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1762 | } | |
1763 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1764 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1765 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1766 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1767 | } |
d65f557f | 1768 | out_noforce: |
16e14375 TM |
1769 | status = nfs_post_op_update_inode_locked(inode, fattr, |
1770 | NFS_INO_INVALID_CHANGE | |
1771 | | NFS_INO_INVALID_CTIME | |
3a39e778 ZB |
1772 | | NFS_INO_INVALID_MTIME |
1773 | | NFS_INO_INVALID_BLOCKS); | |
a08a8cd3 TM |
1774 | return status; |
1775 | } | |
1776 | ||
1777 | /** | |
1778 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
302fad7b TM |
1779 | * @inode: pointer to inode |
1780 | * @fattr: updated attributes | |
a08a8cd3 TM |
1781 | * |
1782 | * After an operation that has changed the inode metadata, mark the | |
1783 | * attribute cache as being invalid, then try to update it. Fake up | |
1784 | * weak cache consistency data, if none exist. | |
1785 | * | |
1786 | * This function is mainly designed to be used by the ->write_done() functions. | |
1787 | */ | |
1788 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1789 | { | |
1790 | int status; | |
1791 | ||
1792 | spin_lock(&inode->i_lock); | |
8f8ba1d7 | 1793 | nfs_fattr_set_barrier(fattr); |
a08a8cd3 | 1794 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
d65f557f TM |
1795 | spin_unlock(&inode->i_lock); |
1796 | return status; | |
70ca8852 | 1797 | } |
ddda8e0a | 1798 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1799 | |
ea96d1ec | 1800 | |
1da177e4 LT |
1801 | /* |
1802 | * Many nfs protocol calls return the new file attributes after | |
1803 | * an operation. Here we update the inode to reflect the state | |
1804 | * of the server's inode. | |
1805 | * | |
1806 | * This is a bit tricky because we have to make sure all dirty pages | |
1807 | * have been sent off to the server before calling invalidate_inode_pages. | |
1808 | * To make sure no other process adds more write requests while we try | |
1809 | * our best to flush them, we make them sleep during the attribute refresh. | |
1810 | * | |
1811 | * A very similar scenario holds for the dir cache. | |
1812 | */ | |
24aa1fe6 | 1813 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1814 | { |
8b4bdcf8 | 1815 | struct nfs_server *server; |
1da177e4 | 1816 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1817 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1818 | unsigned long invalid = 0; |
3e7d950a | 1819 | unsigned long now = jiffies; |
62ab460c | 1820 | unsigned long save_cache_validity; |
651b0e70 | 1821 | bool have_writers = nfs_file_has_buffered_writers(nfsi); |
944171cb | 1822 | bool cache_revalidated = true; |
0b467264 | 1823 | bool attr_changed = false; |
c80d17c5 | 1824 | bool have_delegation; |
1da177e4 | 1825 | |
1e8968c5 | 1826 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1827 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1828 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1829 | atomic_read(&inode->i_count), fattr->valid); |
1830 | ||
eb3d8f42 TM |
1831 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) { |
1832 | /* Only a mounted-on-fileid? Just exit */ | |
1833 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1834 | return 0; | |
7e10cc25 | 1835 | /* Has the inode gone and changed behind our back? */ |
eb3d8f42 | 1836 | } else if (nfsi->fileid != fattr->fileid) { |
7e10cc25 TM |
1837 | /* Is this perhaps the mounted-on fileid? */ |
1838 | if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) && | |
1839 | nfsi->fileid == fattr->mounted_on_fileid) | |
1840 | return 0; | |
e73e6c9e MT |
1841 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
1842 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1843 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1844 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1845 | (long long)fattr->fileid); | |
1846 | goto out_err; | |
1847 | } | |
1da177e4 LT |
1848 | |
1849 | /* | |
1850 | * Make sure the inode's type hasn't changed. | |
1851 | */ | |
e73e6c9e MT |
1852 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1853 | /* | |
1854 | * Big trouble! The inode has become a different object. | |
1855 | */ | |
1e8968c5 | 1856 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1857 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1858 | goto out_err; | |
1859 | } | |
1da177e4 | 1860 | |
8b4bdcf8 | 1861 | server = NFS_SERVER(inode); |
a0356862 | 1862 | /* Update the fsid? */ |
9e6e70f8 | 1863 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1864 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1865 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1866 | server->fsid = fattr->fsid; |
1867 | ||
c80d17c5 TM |
1868 | /* Save the delegation state before clearing cache_validity */ |
1869 | have_delegation = nfs_have_delegated_attributes(inode); | |
1870 | ||
1da177e4 LT |
1871 | /* |
1872 | * Update the read time so we don't revalidate too often. | |
1873 | */ | |
33801147 | 1874 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1875 | |
62ab460c TM |
1876 | save_cache_validity = nfsi->cache_validity; |
1877 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1878 | | NFS_INO_INVALID_ATIME | |
1879 | | NFS_INO_REVAL_FORCED | |
3a39e778 ZB |
1880 | | NFS_INO_REVAL_PAGECACHE |
1881 | | NFS_INO_INVALID_BLOCKS); | |
1da177e4 | 1882 | |
a895b4a1 | 1883 | /* Do atomic weak cache consistency updates */ |
783b194c | 1884 | nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1885 | |
944171cb BC |
1886 | if (pnfs_layoutcommit_outstanding(inode)) { |
1887 | nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR; | |
1888 | cache_revalidated = false; | |
1889 | } | |
10b7e9ad | 1890 | |
47aabaa7 | 1891 | /* More cache consistency checks */ |
9e6e70f8 | 1892 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
c472c07b | 1893 | if (!inode_eq_iversion_raw(inode, fattr->change_attr)) { |
38512aa9 | 1894 | /* Could it be a race with writeback? */ |
c80d17c5 | 1895 | if (!(have_writers || have_delegation)) { |
0b467264 | 1896 | invalid |= NFS_INO_INVALID_DATA |
38512aa9 | 1897 | | NFS_INO_INVALID_ACCESS |
95ad37f9 FL |
1898 | | NFS_INO_INVALID_ACL |
1899 | | NFS_INO_INVALID_XATTR; | |
cac88f94 | 1900 | /* Force revalidate of all attributes */ |
16e14375 TM |
1901 | save_cache_validity |= NFS_INO_INVALID_CTIME |
1902 | | NFS_INO_INVALID_MTIME | |
1903 | | NFS_INO_INVALID_SIZE | |
1904 | | NFS_INO_INVALID_OTHER; | |
38512aa9 TM |
1905 | if (S_ISDIR(inode->i_mode)) |
1906 | nfs_force_lookup_revalidate(inode); | |
c80d17c5 TM |
1907 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1908 | inode->i_sb->s_id, | |
1909 | inode->i_ino); | |
1c341b77 TM |
1910 | } else if (!have_delegation) |
1911 | nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER; | |
1eb5d98f | 1912 | inode_set_iversion_raw(inode, fattr->change_attr); |
0b467264 | 1913 | attr_changed = true; |
9e6e70f8 | 1914 | } |
ade14a7d | 1915 | } else { |
8619ddd0 | 1916 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1917 | (NFS_INO_INVALID_CHANGE |
8619ddd0 TM |
1918 | | NFS_INO_REVAL_PAGECACHE |
1919 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1920 | cache_revalidated = false; |
1921 | } | |
9e6e70f8 TM |
1922 | |
1923 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
e86d5a02 | 1924 | inode->i_mtime = fattr->mtime; |
ade14a7d | 1925 | } else if (server->caps & NFS_CAP_MTIME) { |
43b6535e | 1926 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1927 | (NFS_INO_INVALID_MTIME |
62ab460c | 1928 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1929 | cache_revalidated = false; |
1930 | } | |
62ab460c | 1931 | |
9e6e70f8 | 1932 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
e86d5a02 | 1933 | inode->i_ctime = fattr->ctime; |
ade14a7d | 1934 | } else if (server->caps & NFS_CAP_CTIME) { |
43b6535e | 1935 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1936 | (NFS_INO_INVALID_CTIME |
62ab460c | 1937 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1938 | cache_revalidated = false; |
1939 | } | |
47aabaa7 | 1940 | |
951a143b | 1941 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1942 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1943 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1944 | cur_isize = i_size_read(inode); | |
c80d17c5 | 1945 | if (new_isize != cur_isize && !have_delegation) { |
9e6e70f8 TM |
1946 | /* Do we perhaps have any outstanding writes, or has |
1947 | * the file grown beyond our last write? */ | |
a6b6d5b8 | 1948 | if (!nfs_have_writebacks(inode) || new_isize > cur_isize) { |
9e6e70f8 | 1949 | i_size_write(inode, new_isize); |
ca0daa27 | 1950 | if (!have_writers) |
16e14375 | 1951 | invalid |= NFS_INO_INVALID_DATA; |
0b467264 | 1952 | attr_changed = true; |
9e6e70f8 | 1953 | } |
60c16ea8 HJ |
1954 | dprintk("NFS: isize change on server for file %s/%ld " |
1955 | "(%Ld to %Ld)\n", | |
1956 | inode->i_sb->s_id, | |
1957 | inode->i_ino, | |
1958 | (long long)cur_isize, | |
1959 | (long long)new_isize); | |
1da177e4 | 1960 | } |
ade14a7d | 1961 | } else { |
43b6535e | 1962 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1963 | (NFS_INO_INVALID_SIZE |
62ab460c TM |
1964 | | NFS_INO_REVAL_PAGECACHE |
1965 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1966 | cache_revalidated = false; |
1967 | } | |
1da177e4 | 1968 | |
1da177e4 | 1969 | |
9e6e70f8 | 1970 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
e86d5a02 | 1971 | inode->i_atime = fattr->atime; |
ade14a7d | 1972 | else if (server->caps & NFS_CAP_ATIME) { |
43b6535e TM |
1973 | nfsi->cache_validity |= save_cache_validity & |
1974 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1975 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1976 | cache_revalidated = false; |
1977 | } | |
1da177e4 | 1978 | |
9e6e70f8 TM |
1979 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1980 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1981 | umode_t newmode = inode->i_mode & S_IFMT; |
1982 | newmode |= fattr->mode & S_IALLUGO; | |
1983 | inode->i_mode = newmode; | |
16e14375 | 1984 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 TM |
1985 | | NFS_INO_INVALID_ACL; |
1986 | attr_changed = true; | |
9e6e70f8 | 1987 | } |
ade14a7d | 1988 | } else if (server->caps & NFS_CAP_MODE) { |
43b6535e | 1989 | nfsi->cache_validity |= save_cache_validity & |
0b467264 | 1990 | (NFS_INO_INVALID_OTHER |
62ab460c | 1991 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1992 | cache_revalidated = false; |
1993 | } | |
62ab460c | 1994 | |
9e6e70f8 | 1995 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1996 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
16e14375 | 1997 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 | 1998 | | NFS_INO_INVALID_ACL; |
9e6e70f8 | 1999 | inode->i_uid = fattr->uid; |
0b467264 | 2000 | attr_changed = true; |
9e6e70f8 | 2001 | } |
ade14a7d | 2002 | } else if (server->caps & NFS_CAP_OWNER) { |
43b6535e | 2003 | nfsi->cache_validity |= save_cache_validity & |
0b467264 | 2004 | (NFS_INO_INVALID_OTHER |
62ab460c | 2005 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
2006 | cache_revalidated = false; |
2007 | } | |
62ab460c | 2008 | |
9e6e70f8 | 2009 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 2010 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
16e14375 | 2011 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 | 2012 | | NFS_INO_INVALID_ACL; |
9e6e70f8 | 2013 | inode->i_gid = fattr->gid; |
0b467264 | 2014 | attr_changed = true; |
9e6e70f8 | 2015 | } |
ade14a7d | 2016 | } else if (server->caps & NFS_CAP_OWNER_GROUP) { |
43b6535e | 2017 | nfsi->cache_validity |= save_cache_validity & |
0b467264 | 2018 | (NFS_INO_INVALID_OTHER |
62ab460c | 2019 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
2020 | cache_revalidated = false; |
2021 | } | |
921615f1 | 2022 | |
9e6e70f8 TM |
2023 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
2024 | if (inode->i_nlink != fattr->nlink) { | |
9e6e70f8 TM |
2025 | if (S_ISDIR(inode->i_mode)) |
2026 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 2027 | set_nlink(inode, fattr->nlink); |
0b467264 | 2028 | attr_changed = true; |
9e6e70f8 | 2029 | } |
ade14a7d | 2030 | } else if (server->caps & NFS_CAP_NLINK) { |
43b6535e | 2031 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 2032 | (NFS_INO_INVALID_OTHER |
62ab460c | 2033 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
2034 | cache_revalidated = false; |
2035 | } | |
1da177e4 | 2036 | |
9e6e70f8 | 2037 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
2038 | /* |
2039 | * report the blocks in 512byte units | |
2040 | */ | |
2041 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
ade14a7d | 2042 | } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
9e6e70f8 | 2043 | inode->i_blocks = fattr->du.nfs2.blocks; |
3a39e778 ZB |
2044 | else { |
2045 | nfsi->cache_validity |= save_cache_validity & | |
2046 | (NFS_INO_INVALID_BLOCKS | |
2047 | | NFS_INO_REVAL_FORCED); | |
ade14a7d | 2048 | cache_revalidated = false; |
3a39e778 | 2049 | } |
1da177e4 LT |
2050 | |
2051 | /* Update attrtimeo value if we're out of the unstable period */ | |
0b467264 | 2052 | if (attr_changed) { |
cac88f94 | 2053 | invalid &= ~NFS_INO_INVALID_ATTR; |
91d5b470 | 2054 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 2055 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 2056 | nfsi->attrtimeo_timestamp = now; |
f5062003 | 2057 | /* Set barrier to be more recent than all outstanding updates */ |
4704f0e2 | 2058 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 2059 | } else { |
ade14a7d TM |
2060 | if (cache_revalidated) { |
2061 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, | |
2062 | nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { | |
2063 | nfsi->attrtimeo <<= 1; | |
2064 | if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode)) | |
2065 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
2066 | } | |
6d2b2966 TM |
2067 | nfsi->attrtimeo_timestamp = now; |
2068 | } | |
f5062003 TM |
2069 | /* Set the barrier to be more recent than this fattr */ |
2070 | if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) | |
2071 | nfsi->attr_gencount = fattr->gencount; | |
1da177e4 | 2072 | } |
c812012f | 2073 | |
1da177e4 LT |
2074 | /* Don't invalidate the data if we were to blame */ |
2075 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
2076 | || S_ISLNK(inode->i_mode))) | |
2077 | invalid &= ~NFS_INO_INVALID_DATA; | |
c80d17c5 | 2078 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 2079 | |
1da177e4 | 2080 | return 0; |
b37b03b7 | 2081 | out_err: |
1da177e4 LT |
2082 | /* |
2083 | * No need to worry about unhashing the dentry, as the | |
2084 | * lookup validation will know that the inode is bad. | |
2085 | * (But we fall through to invalidate the caches.) | |
2086 | */ | |
93ce4af7 | 2087 | nfs_set_inode_stale_locked(inode); |
1da177e4 LT |
2088 | return -ESTALE; |
2089 | } | |
2090 | ||
f7b422b1 | 2091 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
2092 | { |
2093 | struct nfs_inode *nfsi; | |
c456aacf | 2094 | nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
2095 | if (!nfsi) |
2096 | return NULL; | |
55296809 CL |
2097 | nfsi->flags = 0UL; |
2098 | nfsi->cache_validity = 0UL; | |
89d77c8f | 2099 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
2100 | nfsi->nfs4_acl = NULL; |
2101 | #endif /* CONFIG_NFS_V4 */ | |
95ad37f9 FL |
2102 | #ifdef CONFIG_NFS_V4_2 |
2103 | nfsi->xattr_cache = NULL; | |
2104 | #endif | |
1da177e4 LT |
2105 | return &nfsi->vfs_inode; |
2106 | } | |
89d77c8f | 2107 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 2108 | |
ca1a199e | 2109 | void nfs_free_inode(struct inode *inode) |
1da177e4 LT |
2110 | { |
2111 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
2112 | } | |
ca1a199e | 2113 | EXPORT_SYMBOL_GPL(nfs_free_inode); |
fa0d7e3d | 2114 | |
d75d5414 AM |
2115 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
2116 | { | |
89d77c8f | 2117 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
2118 | INIT_LIST_HEAD(&nfsi->open_states); |
2119 | nfsi->delegation = NULL; | |
d75d5414 | 2120 | init_rwsem(&nfsi->rwsem); |
e5e94017 | 2121 | nfsi->layout = NULL; |
d75d5414 AM |
2122 | #endif |
2123 | } | |
f7b422b1 | 2124 | |
51cc5068 | 2125 | static void init_once(void *foo) |
1da177e4 LT |
2126 | { |
2127 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
2128 | ||
a35afb83 | 2129 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
2130 | INIT_LIST_HEAD(&nfsi->open_files); |
2131 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
2132 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 2133 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a6b6d5b8 | 2134 | atomic_long_set(&nfsi->nrequests, 0); |
5cb953d4 | 2135 | atomic_long_set(&nfsi->commit_info.ncommit, 0); |
1a0de48a | 2136 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
884be175 | 2137 | init_rwsem(&nfsi->rmdir_sem); |
e824f99a | 2138 | mutex_init(&nfsi->commit_mutex); |
a35afb83 | 2139 | nfs4_init_once(nfsi); |
efeda80d | 2140 | nfsi->cache_change_attribute = 0; |
1da177e4 | 2141 | } |
20c2df83 | 2142 | |
f7b422b1 | 2143 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
2144 | { |
2145 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
2146 | sizeof(struct nfs_inode), | |
fffb60f9 | 2147 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 2148 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 2149 | init_once); |
1da177e4 LT |
2150 | if (nfs_inode_cachep == NULL) |
2151 | return -ENOMEM; | |
2152 | ||
2153 | return 0; | |
2154 | } | |
2155 | ||
266bee88 | 2156 | static void nfs_destroy_inodecache(void) |
1da177e4 | 2157 | { |
8c0a8537 KS |
2158 | /* |
2159 | * Make sure all delayed rcu free inodes are flushed before we | |
2160 | * destroy cache. | |
2161 | */ | |
2162 | rcu_barrier(); | |
1a1d92c1 | 2163 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
2164 | } |
2165 | ||
5746006f | 2166 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 2167 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
2168 | |
2169 | /* | |
2170 | * start up the nfsiod workqueue | |
2171 | */ | |
2172 | static int nfsiod_start(void) | |
2173 | { | |
2174 | struct workqueue_struct *wq; | |
2175 | dprintk("RPC: creating workqueue nfsiod\n"); | |
bf701b76 | 2176 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0); |
5746006f TM |
2177 | if (wq == NULL) |
2178 | return -ENOMEM; | |
2179 | nfsiod_workqueue = wq; | |
2180 | return 0; | |
2181 | } | |
2182 | ||
2183 | /* | |
2184 | * Destroy the nfsiod workqueue | |
2185 | */ | |
2186 | static void nfsiod_stop(void) | |
2187 | { | |
2188 | struct workqueue_struct *wq; | |
2189 | ||
2190 | wq = nfsiod_workqueue; | |
2191 | if (wq == NULL) | |
2192 | return; | |
2193 | nfsiod_workqueue = NULL; | |
2194 | destroy_workqueue(wq); | |
2195 | } | |
2196 | ||
c7d03a00 | 2197 | unsigned int nfs_net_id; |
9e2e74db | 2198 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
2199 | |
2200 | static int nfs_net_init(struct net *net) | |
2201 | { | |
6b13168b | 2202 | nfs_clients_init(net); |
65b38851 | 2203 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
2204 | } |
2205 | ||
2206 | static void nfs_net_exit(struct net *net) | |
2207 | { | |
65b38851 | 2208 | nfs_fs_proc_net_exit(net); |
10b7a70c | 2209 | nfs_clients_exit(net); |
1b340d01 SK |
2210 | } |
2211 | ||
2212 | static struct pernet_operations nfs_net_ops = { | |
2213 | .init = nfs_net_init, | |
2214 | .exit = nfs_net_exit, | |
2215 | .id = &nfs_net_id, | |
2216 | .size = sizeof(struct nfs_net), | |
2217 | }; | |
2218 | ||
1da177e4 LT |
2219 | /* |
2220 | * Initialize NFS | |
2221 | */ | |
2222 | static int __init init_nfs_fs(void) | |
2223 | { | |
2224 | int err; | |
2225 | ||
996bc4f4 TM |
2226 | err = nfs_sysfs_init(); |
2227 | if (err < 0) | |
2228 | goto out10; | |
2229 | ||
1b340d01 | 2230 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 2231 | if (err < 0) |
89d77c8f | 2232 | goto out9; |
e571cbf1 | 2233 | |
8ec442ae DH |
2234 | err = nfs_fscache_register(); |
2235 | if (err < 0) | |
89d77c8f | 2236 | goto out8; |
8ec442ae | 2237 | |
5746006f TM |
2238 | err = nfsiod_start(); |
2239 | if (err) | |
89d77c8f | 2240 | goto out7; |
5746006f | 2241 | |
6aaca566 DH |
2242 | err = nfs_fs_proc_init(); |
2243 | if (err) | |
89d77c8f | 2244 | goto out6; |
6aaca566 | 2245 | |
1da177e4 LT |
2246 | err = nfs_init_nfspagecache(); |
2247 | if (err) | |
89d77c8f | 2248 | goto out5; |
1da177e4 LT |
2249 | |
2250 | err = nfs_init_inodecache(); | |
2251 | if (err) | |
89d77c8f | 2252 | goto out4; |
1da177e4 LT |
2253 | |
2254 | err = nfs_init_readpagecache(); | |
2255 | if (err) | |
89d77c8f | 2256 | goto out3; |
1da177e4 LT |
2257 | |
2258 | err = nfs_init_writepagecache(); | |
2259 | if (err) | |
89d77c8f | 2260 | goto out2; |
1da177e4 | 2261 | |
1da177e4 LT |
2262 | err = nfs_init_directcache(); |
2263 | if (err) | |
89d77c8f | 2264 | goto out1; |
1da177e4 | 2265 | |
ec7652aa | 2266 | rpc_proc_register(&init_net, &nfs_rpcstat); |
cd738ee9 KM |
2267 | |
2268 | err = register_nfs_fs(); | |
2269 | if (err) | |
129d1977 BS |
2270 | goto out0; |
2271 | ||
1da177e4 | 2272 | return 0; |
129d1977 | 2273 | out0: |
ec7652aa | 2274 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2275 | nfs_destroy_directcache(); |
89d77c8f | 2276 | out1: |
129d1977 | 2277 | nfs_destroy_writepagecache(); |
89d77c8f | 2278 | out2: |
129d1977 | 2279 | nfs_destroy_readpagecache(); |
89d77c8f | 2280 | out3: |
129d1977 | 2281 | nfs_destroy_inodecache(); |
89d77c8f | 2282 | out4: |
129d1977 | 2283 | nfs_destroy_nfspagecache(); |
89d77c8f | 2284 | out5: |
129d1977 | 2285 | nfs_fs_proc_exit(); |
89d77c8f | 2286 | out6: |
129d1977 | 2287 | nfsiod_stop(); |
89d77c8f | 2288 | out7: |
129d1977 | 2289 | nfs_fscache_unregister(); |
89d77c8f | 2290 | out8: |
129d1977 | 2291 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 2292 | out9: |
996bc4f4 TM |
2293 | nfs_sysfs_exit(); |
2294 | out10: | |
1da177e4 LT |
2295 | return err; |
2296 | } | |
2297 | ||
2298 | static void __exit exit_nfs_fs(void) | |
2299 | { | |
1da177e4 | 2300 | nfs_destroy_directcache(); |
1da177e4 LT |
2301 | nfs_destroy_writepagecache(); |
2302 | nfs_destroy_readpagecache(); | |
2303 | nfs_destroy_inodecache(); | |
2304 | nfs_destroy_nfspagecache(); | |
8ec442ae | 2305 | nfs_fscache_unregister(); |
1b340d01 | 2306 | unregister_pernet_subsys(&nfs_net_ops); |
ec7652aa | 2307 | rpc_proc_unregister(&init_net, "nfs"); |
f7b422b1 | 2308 | unregister_nfs_fs(); |
6aaca566 | 2309 | nfs_fs_proc_exit(); |
5746006f | 2310 | nfsiod_stop(); |
996bc4f4 | 2311 | nfs_sysfs_exit(); |
1da177e4 LT |
2312 | } |
2313 | ||
2314 | /* Not quite true; I just maintain it */ | |
2315 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2316 | MODULE_LICENSE("GPL"); | |
f43bf0be | 2317 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
2318 | |
2319 | module_init(init_nfs_fs) | |
2320 | module_exit(exit_nfs_fs) |