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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 | |
1da177e4 | 65 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 66 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 67 | |
e18b890b | 68 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 69 | |
1da177e4 LT |
70 | static inline unsigned long |
71 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
72 | { | |
73 | return nfs_fileid_to_ino_t(fattr->fileid); | |
74 | } | |
75 | ||
210c7c17 | 76 | static int nfs_wait_killable(int mode) |
72cb77f4 | 77 | { |
416ad3c9 | 78 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
79 | if (signal_pending_state(mode, current)) |
80 | return -ERESTARTSYS; | |
72cb77f4 TM |
81 | return 0; |
82 | } | |
210c7c17 BC |
83 | |
84 | int nfs_wait_bit_killable(struct wait_bit_key *key, int mode) | |
85 | { | |
86 | return nfs_wait_killable(mode); | |
87 | } | |
89d77c8f | 88 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 89 | |
f43bf0be TM |
90 | /** |
91 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
92 | * @fileid: 64-bit fileid | |
93 | * | |
94 | * This function returns a 32-bit inode number if the boot parameter | |
95 | * nfs.enable_ino64 is zero. | |
96 | */ | |
97 | u64 nfs_compat_user_ino64(u64 fileid) | |
98 | { | |
3fa0b4e2 FF |
99 | #ifdef CONFIG_COMPAT |
100 | compat_ulong_t ino; | |
101 | #else | |
102 | unsigned long ino; | |
103 | #endif | |
f43bf0be TM |
104 | |
105 | if (enable_ino64) | |
106 | return fileid; | |
107 | ino = fileid; | |
108 | if (sizeof(ino) < sizeof(fileid)) | |
109 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
110 | return ino; | |
111 | } | |
112 | ||
eed99357 TM |
113 | int nfs_drop_inode(struct inode *inode) |
114 | { | |
115 | return NFS_STALE(inode) || generic_drop_inode(inode); | |
116 | } | |
117 | EXPORT_SYMBOL_GPL(nfs_drop_inode); | |
118 | ||
19d87ca3 | 119 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 120 | { |
da6d503a TM |
121 | /* |
122 | * The following should never happen... | |
123 | */ | |
f48407dd TM |
124 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
125 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); | |
ada70d94 | 126 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 127 | nfs_access_zap_cache(inode); |
f1fe29b4 | 128 | nfs_fscache_clear_inode(inode); |
1da177e4 | 129 | } |
89d77c8f | 130 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 131 | |
b57922d9 AV |
132 | void nfs_evict_inode(struct inode *inode) |
133 | { | |
91b0abe3 | 134 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 135 | clear_inode(inode); |
b57922d9 AV |
136 | nfs_clear_inode(inode); |
137 | } | |
138 | ||
9e1681c2 | 139 | int nfs_sync_inode(struct inode *inode) |
4d346bea | 140 | { |
95d9f6c3 | 141 | inode_dio_wait(inode); |
4d346bea TM |
142 | return nfs_wb_all(inode); |
143 | } | |
9e1681c2 | 144 | EXPORT_SYMBOL_GPL(nfs_sync_inode); |
4d346bea | 145 | |
29884df0 TM |
146 | /** |
147 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
302fad7b | 148 | * @mapping: pointer to struct address_space |
29884df0 TM |
149 | */ |
150 | int nfs_sync_mapping(struct address_space *mapping) | |
151 | { | |
5cf95214 | 152 | int ret = 0; |
29884df0 | 153 | |
5cf95214 TM |
154 | if (mapping->nrpages != 0) { |
155 | unmap_mapping_range(mapping, 0, 0, 0); | |
156 | ret = nfs_wb_all(mapping->host); | |
157 | } | |
29884df0 TM |
158 | return ret; |
159 | } | |
160 | ||
187e593d TM |
161 | static int nfs_attribute_timeout(struct inode *inode) |
162 | { | |
163 | struct nfs_inode *nfsi = NFS_I(inode); | |
164 | ||
165 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); | |
166 | } | |
167 | ||
61540bf6 TM |
168 | static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags) |
169 | { | |
170 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
171 | ||
172 | /* Special case for the pagecache or access cache */ | |
173 | if (flags == NFS_INO_REVAL_PAGECACHE && | |
174 | !(cache_validity & NFS_INO_REVAL_FORCED)) | |
175 | return false; | |
176 | return (cache_validity & flags) != 0; | |
177 | } | |
178 | ||
179 | static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags) | |
180 | { | |
181 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
182 | ||
183 | if ((cache_validity & flags) != 0) | |
184 | return true; | |
185 | if (nfs_attribute_timeout(inode)) | |
186 | return true; | |
187 | return false; | |
188 | } | |
189 | ||
190 | bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags) | |
191 | { | |
192 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) | |
193 | return nfs_check_cache_invalid_delegated(inode, flags); | |
194 | ||
195 | return nfs_check_cache_invalid_not_delegated(inode, flags); | |
196 | } | |
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 | |
208 | | NFS_INO_REVAL_PAGECACHE); | |
209 | } | |
6edf9609 TM |
210 | |
211 | if (inode->i_mapping->nrpages == 0) | |
1c341b77 | 212 | flags &= ~(NFS_INO_INVALID_DATA|NFS_INO_DATA_INVAL_DEFER); |
6edf9609 TM |
213 | nfsi->cache_validity |= flags; |
214 | if (flags & NFS_INO_INVALID_DATA) | |
215 | nfs_fscache_invalidate(inode); | |
216 | } | |
217 | ||
1da177e4 LT |
218 | /* |
219 | * Invalidate the local caches | |
220 | */ | |
b37b03b7 | 221 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
222 | { |
223 | struct nfs_inode *nfsi = NFS_I(inode); | |
224 | int mode = inode->i_mode; | |
225 | ||
91d5b470 CL |
226 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
227 | ||
c7c20973 TM |
228 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
229 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 230 | |
c3f52af3 | 231 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
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 | |
6edf9609 | 237 | | NFS_INO_REVAL_PAGECACHE); |
aa9c2669 | 238 | } else |
6edf9609 | 239 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
240 | | NFS_INO_INVALID_ACCESS |
241 | | NFS_INO_INVALID_ACL | |
6edf9609 | 242 | | NFS_INO_REVAL_PAGECACHE); |
fd1defc2 | 243 | nfs_zap_label_cache_locked(nfsi); |
b37b03b7 | 244 | } |
dc59250c | 245 | |
b37b03b7 TM |
246 | void nfs_zap_caches(struct inode *inode) |
247 | { | |
248 | spin_lock(&inode->i_lock); | |
249 | nfs_zap_caches_locked(inode); | |
dc59250c | 250 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
251 | } |
252 | ||
cd9ae2b6 TM |
253 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
254 | { | |
255 | if (mapping->nrpages != 0) { | |
256 | spin_lock(&inode->i_lock); | |
6edf9609 | 257 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
cd9ae2b6 TM |
258 | spin_unlock(&inode->i_lock); |
259 | } | |
260 | } | |
261 | ||
f41f7418 | 262 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
263 | { |
264 | void (*clear_acl_cache)(struct inode *); | |
265 | ||
266 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
267 | if (clear_acl_cache != NULL) | |
268 | clear_acl_cache(inode); | |
dc59250c | 269 | spin_lock(&inode->i_lock); |
55296809 | 270 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 271 | spin_unlock(&inode->i_lock); |
1da177e4 | 272 | } |
1c606fb7 | 273 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 274 | |
c4812998 TM |
275 | void nfs_invalidate_atime(struct inode *inode) |
276 | { | |
277 | spin_lock(&inode->i_lock); | |
6edf9609 | 278 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
c4812998 TM |
279 | spin_unlock(&inode->i_lock); |
280 | } | |
ddda8e0a | 281 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 282 | |
1da177e4 | 283 | /* |
b37b03b7 TM |
284 | * Invalidate, but do not unhash, the inode. |
285 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 286 | */ |
b37b03b7 | 287 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 288 | { |
3a10c30a | 289 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 290 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
291 | } |
292 | ||
293 | struct nfs_find_desc { | |
294 | struct nfs_fh *fh; | |
295 | struct nfs_fattr *fattr; | |
296 | }; | |
297 | ||
298 | /* | |
299 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
300 | * this, and re-exported directories (also seen in NFSv2) | |
301 | * we are forced to allow 2 different inodes to have the same | |
302 | * i_ino. | |
303 | */ | |
304 | static int | |
305 | nfs_find_actor(struct inode *inode, void *opaque) | |
306 | { | |
307 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
308 | struct nfs_fh *fh = desc->fh; | |
309 | struct nfs_fattr *fattr = desc->fattr; | |
310 | ||
311 | if (NFS_FILEID(inode) != fattr->fileid) | |
312 | return 0; | |
f6488c9b JL |
313 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
314 | return 0; | |
1da177e4 LT |
315 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
316 | return 0; | |
317 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
318 | return 0; | |
319 | return 1; | |
320 | } | |
321 | ||
322 | static int | |
323 | nfs_init_locked(struct inode *inode, void *opaque) | |
324 | { | |
325 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
326 | struct nfs_fattr *fattr = desc->fattr; | |
327 | ||
99fadcd7 | 328 | set_nfs_fileid(inode, fattr->fileid); |
916ec34d | 329 | inode->i_mode = fattr->mode; |
1da177e4 LT |
330 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
331 | return 0; | |
332 | } | |
333 | ||
e058f70b | 334 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
fd1defc2 TM |
335 | static void nfs_clear_label_invalid(struct inode *inode) |
336 | { | |
337 | spin_lock(&inode->i_lock); | |
338 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; | |
339 | spin_unlock(&inode->i_lock); | |
340 | } | |
341 | ||
aa9c2669 DQ |
342 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
343 | struct nfs4_label *label) | |
344 | { | |
345 | int error; | |
346 | ||
347 | if (label == NULL) | |
348 | return; | |
349 | ||
aa9c2669 DQ |
350 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
351 | error = security_inode_notifysecctx(inode, label->label, | |
352 | label->len); | |
353 | if (error) | |
354 | printk(KERN_ERR "%s() %s %d " | |
355 | "security_inode_notifysecctx() %d\n", | |
356 | __func__, | |
357 | (char *)label->label, | |
358 | label->len, error); | |
fd1defc2 | 359 | nfs_clear_label_invalid(inode); |
aa9c2669 DQ |
360 | } |
361 | } | |
362 | ||
e058f70b SD |
363 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
364 | { | |
365 | struct nfs4_label *label = NULL; | |
366 | int minor_version = server->nfs_client->cl_minorversion; | |
367 | ||
368 | if (minor_version < 2) | |
369 | return label; | |
370 | ||
371 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
372 | return label; | |
373 | ||
374 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
375 | if (label == NULL) | |
376 | return ERR_PTR(-ENOMEM); | |
377 | ||
378 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
379 | if (label->label == NULL) { | |
380 | kfree(label); | |
381 | return ERR_PTR(-ENOMEM); | |
382 | } | |
383 | label->len = NFS4_MAXLABELLEN; | |
384 | ||
385 | return label; | |
386 | } | |
387 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 388 | #else |
829e57d7 | 389 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
aa9c2669 DQ |
390 | struct nfs4_label *label) |
391 | { | |
392 | } | |
e058f70b | 393 | #endif |
aa9c2669 | 394 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 395 | |
f174ff7a PT |
396 | /* Search for inode identified by fh, fileid and i_mode in inode cache. */ |
397 | struct inode * | |
398 | nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh) | |
399 | { | |
400 | struct nfs_find_desc desc = { | |
401 | .fh = fh, | |
402 | .fattr = fattr, | |
403 | }; | |
404 | struct inode *inode; | |
405 | unsigned long hash; | |
406 | ||
407 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) || | |
408 | !(fattr->valid & NFS_ATTR_FATTR_TYPE)) | |
409 | return NULL; | |
410 | ||
411 | hash = nfs_fattr_to_ino_t(fattr); | |
412 | inode = ilookup5(sb, hash, nfs_find_actor, &desc); | |
413 | ||
414 | dprintk("%s: returning %p\n", __func__, inode); | |
415 | return inode; | |
416 | } | |
417 | ||
1da177e4 LT |
418 | /* |
419 | * This is our front-end to iget that looks up inodes by file handle | |
420 | * instead of inode number. | |
421 | */ | |
422 | struct inode * | |
1775fd3e | 423 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
424 | { |
425 | struct nfs_find_desc desc = { | |
426 | .fh = fh, | |
427 | .fattr = fattr | |
428 | }; | |
03f28e3a | 429 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
430 | unsigned long hash; |
431 | ||
7ebb9315 BS |
432 | nfs_attr_check_mountpoint(sb, fattr); |
433 | ||
2ef47eb1 AS |
434 | if (nfs_attr_use_mounted_on_fileid(fattr)) |
435 | fattr->fileid = fattr->mounted_on_fileid; | |
436 | else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) | |
1da177e4 | 437 | goto out_no_inode; |
9e6e70f8 | 438 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 439 | goto out_no_inode; |
1da177e4 LT |
440 | |
441 | hash = nfs_fattr_to_ino_t(fattr); | |
442 | ||
03f28e3a TM |
443 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
444 | if (inode == NULL) { | |
445 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 446 | goto out_no_inode; |
03f28e3a | 447 | } |
1da177e4 LT |
448 | |
449 | if (inode->i_state & I_NEW) { | |
450 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 451 | unsigned long now = jiffies; |
1da177e4 LT |
452 | |
453 | /* We set i_ino for the few things that still rely on it, | |
454 | * such as stat(2) */ | |
455 | inode->i_ino = hash; | |
456 | ||
457 | /* We can't support update_atime(), since the server will reset it */ | |
458 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
459 | inode->i_mode = fattr->mode; | |
821a868a | 460 | nfsi->cache_validity = 0; |
62ab460c TM |
461 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
462 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
16e14375 | 463 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
1da177e4 LT |
464 | /* Why so? Because we want revalidate for devices/FIFOs, and |
465 | * that's precisely what we have in nfs_file_inode_operations. | |
466 | */ | |
8fa5c000 | 467 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 468 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 469 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 | 470 | inode->i_data.a_ops = &nfs_file_aops; |
1da177e4 | 471 | } else if (S_ISDIR(inode->i_mode)) { |
8fa5c000 | 472 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 473 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 474 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 475 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
476 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
477 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
478 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
479 | inode->i_op = &nfs_referral_inode_operations; | |
480 | else | |
481 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 482 | inode->i_fop = NULL; |
36d43a43 | 483 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 484 | } |
21fc61c7 | 485 | } else if (S_ISLNK(inode->i_mode)) { |
1da177e4 | 486 | inode->i_op = &nfs_symlink_inode_operations; |
21fc61c7 AV |
487 | inode_nohighmem(inode); |
488 | } else | |
1da177e4 LT |
489 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
490 | ||
9e6e70f8 TM |
491 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
492 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
493 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
1eb5d98f | 494 | inode_set_iversion_raw(inode, 0); |
9e6e70f8 | 495 | inode->i_size = 0; |
6d6b77f1 | 496 | clear_nlink(inode); |
9ff593c4 EB |
497 | inode->i_uid = make_kuid(&init_user_ns, -2); |
498 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
499 | inode->i_blocks = 0; |
500 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
501 | nfsi->write_io = 0; |
502 | nfsi->read_io = 0; | |
9e6e70f8 | 503 | |
33801147 | 504 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 505 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 | 506 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
95582b00 | 507 | inode->i_atime = timespec_to_timespec64(fattr->atime); |
62ab460c | 508 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
16e14375 | 509 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
9e6e70f8 | 510 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
95582b00 | 511 | inode->i_mtime = timespec_to_timespec64(fattr->mtime); |
62ab460c | 512 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
16e14375 | 513 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); |
9e6e70f8 | 514 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
95582b00 | 515 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); |
62ab460c | 516 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
16e14375 | 517 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME); |
9e6e70f8 | 518 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1eb5d98f | 519 | inode_set_iversion_raw(inode, fattr->change_attr); |
cd812599 | 520 | else |
16e14375 | 521 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE); |
9e6e70f8 TM |
522 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
523 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 524 | else |
16e14375 | 525 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE); |
9e6e70f8 | 526 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 527 | set_nlink(inode, fattr->nlink); |
62ab460c | 528 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
16e14375 | 529 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
9e6e70f8 TM |
530 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
531 | inode->i_uid = fattr->uid; | |
62ab460c | 532 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
16e14375 | 533 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
9e6e70f8 TM |
534 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
535 | inode->i_gid = fattr->gid; | |
62ab460c | 536 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
16e14375 | 537 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
9e6e70f8 TM |
538 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
539 | inode->i_blocks = fattr->du.nfs2.blocks; | |
540 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
541 | /* |
542 | * report the blocks in 512byte units | |
543 | */ | |
544 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 545 | } |
aa9c2669 | 546 | |
821a868a TM |
547 | if (nfsi->cache_validity != 0) |
548 | nfsi->cache_validity |= NFS_INO_REVAL_FORCED; | |
549 | ||
aa9c2669 DQ |
550 | nfs_setsecurity(inode, fattr, label); |
551 | ||
1da177e4 | 552 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 553 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 554 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 555 | |
f1fe29b4 | 556 | nfs_fscache_init_inode(inode); |
ef79c097 | 557 | |
1da177e4 | 558 | unlock_new_inode(inode); |
26fde4df N |
559 | } else { |
560 | int err = nfs_refresh_inode(inode, fattr); | |
561 | if (err < 0) { | |
562 | iput(inode); | |
563 | inode = ERR_PTR(err); | |
564 | goto out_no_inode; | |
565 | } | |
566 | } | |
1e8968c5 | 567 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 568 | inode->i_sb->s_id, |
1e8968c5 | 569 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 570 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
571 | atomic_read(&inode->i_count)); |
572 | ||
573 | out: | |
574 | return inode; | |
575 | ||
576 | out_no_inode: | |
03f28e3a | 577 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
578 | goto out; |
579 | } | |
89d77c8f | 580 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 581 | |
536e43d1 | 582 | #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 |
583 | |
584 | int | |
585 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
586 | { | |
2b0143b5 | 587 | struct inode *inode = d_inode(dentry); |
987f8dfc | 588 | struct nfs_fattr *fattr; |
ae57ca0f | 589 | int error = 0; |
1da177e4 | 590 | |
91d5b470 CL |
591 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
592 | ||
188b95dd JL |
593 | /* skip mode change if it's just for clearing setuid/setgid */ |
594 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
595 | attr->ia_valid &= ~ATTR_MODE; | |
596 | ||
1da177e4 | 597 | if (attr->ia_valid & ATTR_SIZE) { |
08a899d5 CH |
598 | BUG_ON(!S_ISREG(inode->i_mode)); |
599 | ||
ae57ca0f KM |
600 | error = inode_newsize_ok(inode, attr->ia_size); |
601 | if (error) | |
602 | return error; | |
603 | ||
604 | if (attr->ia_size == i_size_read(inode)) | |
1da177e4 LT |
605 | attr->ia_valid &= ~ATTR_SIZE; |
606 | } | |
607 | ||
608 | /* Optimization: if the end result is no change, don't RPC */ | |
609 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 610 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
611 | return 0; |
612 | ||
f4ce1299 TM |
613 | trace_nfs_setattr_enter(inode); |
614 | ||
755c1e20 | 615 | /* Write all dirty data */ |
4d346bea TM |
616 | if (S_ISREG(inode->i_mode)) |
617 | nfs_sync_inode(inode); | |
987f8dfc TM |
618 | |
619 | fattr = nfs_alloc_fattr(); | |
ae57ca0f KM |
620 | if (fattr == NULL) { |
621 | error = -ENOMEM; | |
987f8dfc | 622 | goto out; |
ae57ca0f KM |
623 | } |
624 | ||
987f8dfc | 625 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 626 | if (error == 0) |
aa9c2669 | 627 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
628 | nfs_free_fattr(fattr); |
629 | out: | |
f4ce1299 | 630 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
631 | return error; |
632 | } | |
ddda8e0a | 633 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 634 | |
a3d01454 TM |
635 | /** |
636 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
637 | * @inode: inode of the file used | |
638 | * @offset: file offset to start truncating | |
639 | * | |
640 | * This is a copy of the common vmtruncate, but with the locking | |
641 | * corrected to take into account the fact that NFS requires | |
642 | * inode->i_size to be updated under the inode->i_lock. | |
f044636d | 643 | * Note: must be called with inode->i_lock held! |
a3d01454 TM |
644 | */ |
645 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
646 | { | |
c08d3b0e | 647 | int err; |
a3d01454 | 648 | |
c08d3b0e | 649 | err = inode_newsize_ok(inode, offset); |
650 | if (err) | |
651 | goto out; | |
a3d01454 | 652 | |
c08d3b0e | 653 | i_size_write(inode, offset); |
6edf9609 TM |
654 | /* Optimisation */ |
655 | if (offset == 0) | |
1c341b77 TM |
656 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_DATA | |
657 | NFS_INO_DATA_INVAL_DEFER); | |
f6cdfa6d | 658 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE; |
c08d3b0e | 659 | |
f044636d | 660 | spin_unlock(&inode->i_lock); |
7caef267 | 661 | truncate_pagecache(inode, offset); |
f044636d | 662 | spin_lock(&inode->i_lock); |
c08d3b0e | 663 | out: |
664 | return err; | |
a3d01454 TM |
665 | } |
666 | ||
65e4308d TM |
667 | /** |
668 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
669 | * @inode: pointer to struct inode | |
670 | * @attr: pointer to struct iattr | |
16e14375 | 671 | * @fattr: pointer to struct nfs_fattr |
65e4308d TM |
672 | * |
673 | * Note: we do this in the *proc.c in order to ensure that | |
674 | * it works for things like exclusive creates too. | |
675 | */ | |
f044636d TM |
676 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, |
677 | struct nfs_fattr *fattr) | |
65e4308d | 678 | { |
f044636d TM |
679 | /* Barrier: bump the attribute generation count. */ |
680 | nfs_fattr_set_barrier(fattr); | |
681 | ||
682 | spin_lock(&inode->i_lock); | |
683 | NFS_I(inode)->attr_gencount = fattr->gencount; | |
6a97d02d TM |
684 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
685 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); | |
686 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); | |
687 | nfs_vmtruncate(inode, attr->ia_size); | |
688 | } | |
65e4308d | 689 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
6a97d02d | 690 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME; |
1da177e4 | 691 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
692 | int mode = attr->ia_mode & S_IALLUGO; |
693 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
694 | inode->i_mode = mode; |
695 | } | |
696 | if ((attr->ia_valid & ATTR_UID) != 0) | |
697 | inode->i_uid = attr->ia_uid; | |
698 | if ((attr->ia_valid & ATTR_GID) != 0) | |
699 | inode->i_gid = attr->ia_gid; | |
6a97d02d | 700 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
15eefe2a | 701 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); |
6a97d02d TM |
702 | else |
703 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
704 | | NFS_INO_INVALID_CTIME); | |
6edf9609 TM |
705 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
706 | | NFS_INO_INVALID_ACL); | |
65e4308d | 707 | } |
6a97d02d TM |
708 | if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) { |
709 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME | |
710 | | NFS_INO_INVALID_CTIME); | |
711 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) | |
15eefe2a | 712 | inode->i_atime = timespec_to_timespec64(fattr->atime); |
6a97d02d TM |
713 | else if (attr->ia_valid & ATTR_ATIME_SET) |
714 | inode->i_atime = attr->ia_atime; | |
715 | else | |
716 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); | |
717 | ||
718 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
15eefe2a | 719 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); |
6a97d02d TM |
720 | else |
721 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
722 | | NFS_INO_INVALID_CTIME); | |
723 | } | |
724 | if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) { | |
725 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME | |
726 | | NFS_INO_INVALID_CTIME); | |
727 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
15eefe2a | 728 | inode->i_mtime = timespec_to_timespec64(fattr->mtime); |
6a97d02d TM |
729 | else if (attr->ia_valid & ATTR_MTIME_SET) |
730 | inode->i_mtime = attr->ia_mtime; | |
731 | else | |
732 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); | |
733 | ||
734 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
15eefe2a | 735 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); |
6a97d02d TM |
736 | else |
737 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
738 | | NFS_INO_INVALID_CTIME); | |
65e4308d | 739 | } |
616c3196 JL |
740 | if (fattr->valid) |
741 | nfs_update_inode(inode, fattr); | |
f044636d | 742 | spin_unlock(&inode->i_lock); |
1da177e4 | 743 | } |
ddda8e0a | 744 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 745 | |
1bcf4c5c | 746 | static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry) |
311324ad TM |
747 | { |
748 | struct dentry *parent; | |
749 | ||
1bcf4c5c TM |
750 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) |
751 | return; | |
311324ad | 752 | parent = dget_parent(dentry); |
2b0143b5 | 753 | nfs_force_use_readdirplus(d_inode(parent)); |
311324ad TM |
754 | dput(parent); |
755 | } | |
756 | ||
1bcf4c5c TM |
757 | static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry) |
758 | { | |
759 | struct dentry *parent; | |
760 | ||
761 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) | |
762 | return; | |
763 | parent = dget_parent(dentry); | |
764 | nfs_advise_use_readdirplus(d_inode(parent)); | |
765 | dput(parent); | |
766 | } | |
767 | ||
311324ad TM |
768 | static bool nfs_need_revalidate_inode(struct inode *inode) |
769 | { | |
770 | if (NFS_I(inode)->cache_validity & | |
771 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
772 | return true; | |
773 | if (nfs_attribute_cache_expired(inode)) | |
774 | return true; | |
775 | return false; | |
776 | } | |
777 | ||
a528d35e DH |
778 | int nfs_getattr(const struct path *path, struct kstat *stat, |
779 | u32 request_mask, unsigned int query_flags) | |
1da177e4 | 780 | { |
a528d35e | 781 | struct inode *inode = d_inode(path->dentry); |
9ccee940 TM |
782 | struct nfs_server *server = NFS_SERVER(inode); |
783 | unsigned long cache_validity; | |
16caf5b6 | 784 | int err = 0; |
9ccee940 TM |
785 | bool force_sync = query_flags & AT_STATX_FORCE_SYNC; |
786 | bool do_update = false; | |
1da177e4 | 787 | |
f4ce1299 | 788 | trace_nfs_getattr_enter(inode); |
9ccee940 TM |
789 | |
790 | if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) | |
791 | goto out_no_update; | |
792 | ||
acdc53b2 | 793 | /* Flush out writes to the server in order to update c/mtime. */ |
9ccee940 TM |
794 | if ((request_mask & (STATX_CTIME|STATX_MTIME)) && |
795 | S_ISREG(inode->i_mode)) { | |
79566ef0 | 796 | err = filemap_write_and_wait(inode->i_mapping); |
acdc53b2 TM |
797 | if (err) |
798 | goto out; | |
28c494c5 | 799 | } |
fc33a7bb CH |
800 | |
801 | /* | |
802 | * We may force a getattr if the user cares about atime. | |
803 | * | |
804 | * Note that we only have to check the vfsmount flags here: | |
805 | * - NFS always sets S_NOATIME by so checking it would give a | |
806 | * bogus result | |
1751e8a6 | 807 | * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is |
fc33a7bb CH |
808 | * no point in checking those. |
809 | */ | |
a528d35e DH |
810 | if ((path->mnt->mnt_flags & MNT_NOATIME) || |
811 | ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
9ccee940 TM |
812 | request_mask &= ~STATX_ATIME; |
813 | ||
814 | /* Is the user requesting attributes that might need revalidation? */ | |
815 | if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME| | |
816 | STATX_MTIME|STATX_UID|STATX_GID| | |
817 | STATX_SIZE|STATX_BLOCKS))) | |
818 | goto out_no_revalidate; | |
819 | ||
820 | /* Check whether the cached attributes are stale */ | |
821 | do_update |= force_sync || nfs_attribute_cache_expired(inode); | |
822 | cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
823 | do_update |= cache_validity & | |
824 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL); | |
825 | if (request_mask & STATX_ATIME) | |
826 | do_update |= cache_validity & NFS_INO_INVALID_ATIME; | |
827 | if (request_mask & (STATX_CTIME|STATX_MTIME)) | |
828 | do_update |= cache_validity & NFS_INO_REVAL_PAGECACHE; | |
829 | if (do_update) { | |
830 | /* Update the attribute cache */ | |
59b86d85 HT |
831 | if (!(server->flags & NFS_MOUNT_NOAC)) |
832 | nfs_readdirplus_parent_cache_miss(path->dentry); | |
833 | else | |
834 | nfs_readdirplus_parent_cache_hit(path->dentry); | |
311324ad | 835 | err = __nfs_revalidate_inode(server, inode); |
9ccee940 TM |
836 | if (err) |
837 | goto out; | |
1bcf4c5c | 838 | } else |
a528d35e | 839 | nfs_readdirplus_parent_cache_hit(path->dentry); |
9ccee940 TM |
840 | out_no_revalidate: |
841 | /* Only return attributes that were revalidated. */ | |
842 | stat->result_mask &= request_mask; | |
843 | out_no_update: | |
844 | generic_fillattr(inode, stat); | |
845 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); | |
846 | if (S_ISDIR(inode->i_mode)) | |
847 | stat->blksize = NFS_SERVER(inode)->dtsize; | |
acdc53b2 | 848 | out: |
f4ce1299 | 849 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
850 | return err; |
851 | } | |
ddda8e0a | 852 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 853 | |
f11ac8db TM |
854 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
855 | { | |
2f62b5aa | 856 | refcount_set(&l_ctx->count, 1); |
d51fdb87 | 857 | l_ctx->lockowner = current->files; |
f11ac8db | 858 | INIT_LIST_HEAD(&l_ctx->list); |
210c7c17 | 859 | atomic_set(&l_ctx->io_count, 0); |
f11ac8db TM |
860 | } |
861 | ||
862 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
863 | { | |
1db97eaa | 864 | struct nfs_lock_context *pos; |
f11ac8db | 865 | |
1db97eaa | 866 | list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) { |
d51fdb87 | 867 | if (pos->lockowner != current->files) |
f11ac8db | 868 | continue; |
1db97eaa TM |
869 | if (refcount_inc_not_zero(&pos->count)) |
870 | return pos; | |
871 | } | |
f11ac8db TM |
872 | return NULL; |
873 | } | |
874 | ||
875 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
876 | { | |
877 | struct nfs_lock_context *res, *new = NULL; | |
2b0143b5 | 878 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db | 879 | |
1db97eaa | 880 | rcu_read_lock(); |
f11ac8db | 881 | res = __nfs_find_lock_context(ctx); |
1db97eaa | 882 | rcu_read_unlock(); |
f11ac8db | 883 | if (res == NULL) { |
f11ac8db TM |
884 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
885 | if (new == NULL) | |
b3c54de6 | 886 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
887 | nfs_init_lock_context(new); |
888 | spin_lock(&inode->i_lock); | |
889 | res = __nfs_find_lock_context(ctx); | |
890 | if (res == NULL) { | |
15494511 TM |
891 | new->open_context = get_nfs_open_context(ctx); |
892 | if (new->open_context) { | |
893 | list_add_tail_rcu(&new->list, | |
894 | &ctx->lock_context.list); | |
895 | res = new; | |
896 | new = NULL; | |
897 | } else | |
898 | res = ERR_PTR(-EBADF); | |
f11ac8db | 899 | } |
1db97eaa TM |
900 | spin_unlock(&inode->i_lock); |
901 | kfree(new); | |
f11ac8db | 902 | } |
f11ac8db TM |
903 | return res; |
904 | } | |
1c6dcbe5 | 905 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
906 | |
907 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
908 | { | |
909 | struct nfs_open_context *ctx = l_ctx->open_context; | |
2b0143b5 | 910 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db | 911 | |
2f62b5aa | 912 | if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock)) |
f11ac8db | 913 | return; |
1db97eaa | 914 | list_del_rcu(&l_ctx->list); |
f11ac8db | 915 | spin_unlock(&inode->i_lock); |
15494511 | 916 | put_nfs_open_context(ctx); |
1db97eaa | 917 | kfree_rcu(l_ctx, rcu_head); |
f11ac8db | 918 | } |
1c6dcbe5 | 919 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 920 | |
7fe5c398 TM |
921 | /** |
922 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
923 | * @ctx: pointer to context | |
924 | * @is_sync: is this a synchronous close | |
925 | * | |
5cf9d706 TM |
926 | * Ensure that the attributes are up to date if we're mounted |
927 | * with close-to-open semantics and we have cached data that will | |
928 | * need to be revalidated on open. | |
7fe5c398 TM |
929 | */ |
930 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
931 | { | |
5cf9d706 | 932 | struct nfs_inode *nfsi; |
7fe5c398 TM |
933 | struct inode *inode; |
934 | struct nfs_server *server; | |
935 | ||
936 | if (!(ctx->mode & FMODE_WRITE)) | |
937 | return; | |
938 | if (!is_sync) | |
939 | return; | |
2b0143b5 | 940 | inode = d_inode(ctx->dentry); |
58ff4184 TM |
941 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
942 | return; | |
5cf9d706 TM |
943 | nfsi = NFS_I(inode); |
944 | if (inode->i_mapping->nrpages == 0) | |
945 | return; | |
946 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
947 | return; | |
948 | if (!list_empty(&nfsi->open_files)) | |
7fe5c398 TM |
949 | return; |
950 | server = NFS_SERVER(inode); | |
951 | if (server->flags & NFS_MOUNT_NOCTO) | |
952 | return; | |
953 | nfs_revalidate_inode(server, inode); | |
954 | } | |
ddda8e0a | 955 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 956 | |
532d4def N |
957 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, |
958 | fmode_t f_mode, | |
959 | struct file *filp) | |
1da177e4 LT |
960 | { |
961 | struct nfs_open_context *ctx; | |
a52458b4 | 962 | const struct cred *cred = get_current_cred(); |
1da177e4 | 963 | |
f52720ca | 964 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c | 965 | if (!ctx) { |
a52458b4 | 966 | put_cred(cred); |
5ede7b1c | 967 | return ERR_PTR(-ENOMEM); |
1da177e4 | 968 | } |
5ede7b1c AV |
969 | nfs_sb_active(dentry->d_sb); |
970 | ctx->dentry = dget(dentry); | |
971 | ctx->cred = cred; | |
ddf529ee | 972 | ctx->ll_cred = NULL; |
5ede7b1c AV |
973 | ctx->state = NULL; |
974 | ctx->mode = f_mode; | |
975 | ctx->flags = 0; | |
976 | ctx->error = 0; | |
532d4def | 977 | ctx->flock_owner = (fl_owner_t)filp; |
5ede7b1c AV |
978 | nfs_init_lock_context(&ctx->lock_context); |
979 | ctx->lock_context.open_context = ctx; | |
980 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 981 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
982 | return ctx; |
983 | } | |
89d77c8f | 984 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
985 | |
986 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
987 | { | |
0de43976 TM |
988 | if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count)) |
989 | return ctx; | |
990 | return NULL; | |
1da177e4 | 991 | } |
89d77c8f | 992 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 993 | |
7fe5c398 | 994 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 995 | { |
2b0143b5 | 996 | struct inode *inode = d_inode(ctx->dentry); |
3d4ff43d | 997 | struct super_block *sb = ctx->dentry->d_sb; |
3bec63db | 998 | |
0de43976 TM |
999 | if (!refcount_dec_and_test(&ctx->lock_context.count)) |
1000 | return; | |
5c78f58e | 1001 | if (!list_empty(&ctx->list)) { |
0de43976 TM |
1002 | spin_lock(&inode->i_lock); |
1003 | list_del_rcu(&ctx->list); | |
ef84303e | 1004 | spin_unlock(&inode->i_lock); |
0de43976 | 1005 | } |
5c78f58e TM |
1006 | if (inode != NULL) |
1007 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
a52458b4 | 1008 | put_cred(ctx->cred); |
3d4ff43d | 1009 | dput(ctx->dentry); |
322b2b90 | 1010 | nfs_sb_deactive(sb); |
ddf529ee | 1011 | put_rpccred(ctx->ll_cred); |
82be417a | 1012 | kfree(ctx->mdsthreshold); |
0de43976 | 1013 | kfree_rcu(ctx, rcu_head); |
3bec63db TM |
1014 | } |
1015 | ||
a49c3c77 TM |
1016 | void put_nfs_open_context(struct nfs_open_context *ctx) |
1017 | { | |
1018 | __put_nfs_open_context(ctx, 0); | |
1019 | } | |
89d77c8f | 1020 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 1021 | |
4eae5014 TM |
1022 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
1023 | { | |
1024 | __put_nfs_open_context(ctx, 1); | |
1025 | } | |
1026 | ||
1da177e4 LT |
1027 | /* |
1028 | * Ensure that mmap has a recent RPC credential for use when writing out | |
1029 | * shared pages | |
1030 | */ | |
c45ffdd2 | 1031 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 1032 | { |
2b0143b5 | 1033 | struct inode *inode = d_inode(ctx->dentry); |
1da177e4 LT |
1034 | struct nfs_inode *nfsi = NFS_I(inode); |
1035 | ||
1da177e4 | 1036 | spin_lock(&inode->i_lock); |
1c341b77 TM |
1037 | if (list_empty(&nfsi->open_files) && |
1038 | (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER)) | |
1039 | nfsi->cache_validity |= NFS_INO_INVALID_DATA | | |
1040 | NFS_INO_REVAL_FORCED; | |
0de43976 | 1041 | list_add_tail_rcu(&ctx->list, &nfsi->open_files); |
1da177e4 LT |
1042 | spin_unlock(&inode->i_lock); |
1043 | } | |
c45ffdd2 TM |
1044 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
1045 | ||
1046 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
1047 | { | |
1048 | filp->private_data = get_nfs_open_context(ctx); | |
1049 | if (list_empty(&ctx->list)) | |
1050 | nfs_inode_attach_open_context(ctx); | |
1051 | } | |
89d77c8f | 1052 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 1053 | |
d530838b TM |
1054 | /* |
1055 | * Given an inode, search for an open context with the desired characteristics | |
1056 | */ | |
a52458b4 | 1057 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode) |
1da177e4 LT |
1058 | { |
1059 | struct nfs_inode *nfsi = NFS_I(inode); | |
1060 | struct nfs_open_context *pos, *ctx = NULL; | |
1061 | ||
0de43976 TM |
1062 | rcu_read_lock(); |
1063 | list_for_each_entry_rcu(pos, &nfsi->open_files, list) { | |
d530838b TM |
1064 | if (cred != NULL && pos->cred != cred) |
1065 | continue; | |
1544fa0f TM |
1066 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
1067 | continue; | |
1068 | ctx = get_nfs_open_context(pos); | |
0de43976 TM |
1069 | if (ctx) |
1070 | break; | |
1da177e4 | 1071 | } |
0de43976 | 1072 | rcu_read_unlock(); |
1da177e4 LT |
1073 | return ctx; |
1074 | } | |
1075 | ||
aff8d8dc | 1076 | void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 1077 | { |
cd3758e3 | 1078 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
1079 | |
1080 | if (ctx) { | |
2b0143b5 | 1081 | struct inode *inode = d_inode(ctx->dentry); |
c45ffdd2 | 1082 | |
0bcbf039 PT |
1083 | /* |
1084 | * We fatal error on write before. Try to writeback | |
1085 | * every page again. | |
1086 | */ | |
1087 | if (ctx->error < 0) | |
1088 | invalidate_inode_pages2(inode->i_mapping); | |
1da177e4 | 1089 | filp->private_data = NULL; |
4eae5014 | 1090 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
1091 | } |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * These allocate and release file read/write context information. | |
1096 | */ | |
1097 | int nfs_open(struct inode *inode, struct file *filp) | |
1098 | { | |
1099 | struct nfs_open_context *ctx; | |
1da177e4 | 1100 | |
532d4def | 1101 | ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp); |
5ede7b1c AV |
1102 | if (IS_ERR(ctx)) |
1103 | return PTR_ERR(ctx); | |
1da177e4 LT |
1104 | nfs_file_set_open_context(filp, ctx); |
1105 | put_nfs_open_context(ctx); | |
f1fe29b4 | 1106 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
1107 | return 0; |
1108 | } | |
44942b4e | 1109 | EXPORT_SYMBOL_GPL(nfs_open); |
1da177e4 | 1110 | |
1da177e4 LT |
1111 | /* |
1112 | * This function is called whenever some part of NFS notices that | |
1113 | * the cached attributes have to be refreshed. | |
1114 | */ | |
1115 | int | |
1116 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1117 | { | |
1118 | int status = -ESTALE; | |
1775fd3e | 1119 | struct nfs4_label *label = NULL; |
a3cba2aa | 1120 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 1121 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1122 | |
1e8968c5 NV |
1123 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
1124 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 1125 | |
f4ce1299 TM |
1126 | trace_nfs_revalidate_inode_enter(inode); |
1127 | ||
85233a7a | 1128 | if (is_bad_inode(inode)) |
691beb13 | 1129 | goto out; |
1da177e4 | 1130 | if (NFS_STALE(inode)) |
412d582e | 1131 | goto out; |
7fdc49c4 | 1132 | |
ac46bd37 TM |
1133 | /* pNFS: Attributes aren't updated until we layoutcommit */ |
1134 | if (S_ISREG(inode->i_mode)) { | |
1135 | status = pnfs_sync_inode(inode, false); | |
1136 | if (status) | |
1137 | goto out; | |
1138 | } | |
1139 | ||
a3cba2aa TM |
1140 | status = -ENOMEM; |
1141 | fattr = nfs_alloc_fattr(); | |
1142 | if (fattr == NULL) | |
1143 | goto out; | |
1144 | ||
691beb13 | 1145 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
1146 | |
1147 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
1148 | if (IS_ERR(label)) { | |
1149 | status = PTR_ERR(label); | |
1150 | goto out; | |
1151 | } | |
1152 | ||
a841b54d TM |
1153 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, |
1154 | label, inode); | |
1da177e4 | 1155 | if (status != 0) { |
1e8968c5 | 1156 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 1157 | inode->i_sb->s_id, |
1e8968c5 | 1158 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
1159 | if (status == -ESTALE) { |
1160 | nfs_zap_caches(inode); | |
1161 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 1162 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 1163 | } |
14c43f76 | 1164 | goto err_out; |
1da177e4 LT |
1165 | } |
1166 | ||
a3cba2aa | 1167 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 1168 | if (status) { |
1e8968c5 | 1169 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 1170 | inode->i_sb->s_id, |
1e8968c5 | 1171 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 1172 | goto err_out; |
1da177e4 | 1173 | } |
55296809 | 1174 | |
24aa1fe6 | 1175 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1176 | nfs_zap_acl_cache(inode); |
55296809 | 1177 | |
3da580aa JL |
1178 | nfs_setsecurity(inode, fattr, label); |
1179 | ||
1e8968c5 | 1180 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 1181 | inode->i_sb->s_id, |
1e8968c5 | 1182 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 1183 | |
14c43f76 DQ |
1184 | err_out: |
1185 | nfs4_label_free(label); | |
1186 | out: | |
a3cba2aa | 1187 | nfs_free_fattr(fattr); |
f4ce1299 | 1188 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
1189 | return status; |
1190 | } | |
1191 | ||
43f291cd | 1192 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 1193 | { |
b4d2314b | 1194 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 1195 | return 0; |
d7cf8dd0 | 1196 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
1197 | } |
1198 | ||
1199 | /** | |
1200 | * nfs_revalidate_inode - Revalidate the inode attributes | |
302fad7b TM |
1201 | * @server: pointer to nfs_server struct |
1202 | * @inode: pointer to inode struct | |
1da177e4 LT |
1203 | * |
1204 | * Updates inode attribute information by retrieving the data from the server. | |
1205 | */ | |
1206 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1207 | { | |
311324ad | 1208 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1209 | return NFS_STALE(inode) ? -ESTALE : 0; |
1210 | return __nfs_revalidate_inode(server, inode); | |
1211 | } | |
1c606fb7 | 1212 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1213 | |
1cda707d | 1214 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1215 | { |
1216 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1217 | int ret; |
1218 | ||
717d44e8 | 1219 | if (mapping->nrpages != 0) { |
f8806c84 TM |
1220 | if (S_ISREG(inode->i_mode)) { |
1221 | ret = nfs_sync_mapping(mapping); | |
1222 | if (ret < 0) | |
1223 | return ret; | |
1224 | } | |
1225 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1226 | if (ret < 0) |
1227 | return ret; | |
1228 | } | |
d529ef83 JL |
1229 | if (S_ISDIR(inode->i_mode)) { |
1230 | spin_lock(&inode->i_lock); | |
717d44e8 | 1231 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1232 | spin_unlock(&inode->i_lock); |
1233 | } | |
717d44e8 | 1234 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1235 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1236 | |
1e8968c5 NV |
1237 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1238 | inode->i_sb->s_id, | |
1239 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1240 | return 0; |
1241 | } | |
1242 | ||
1cd9cb05 | 1243 | bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
b4b1eadf | 1244 | { |
61540bf6 TM |
1245 | return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) || |
1246 | NFS_STALE(inode); | |
b4b1eadf TM |
1247 | } |
1248 | ||
0d0def49 AV |
1249 | int nfs_revalidate_mapping_rcu(struct inode *inode) |
1250 | { | |
1251 | struct nfs_inode *nfsi = NFS_I(inode); | |
1252 | unsigned long *bitlock = &nfsi->flags; | |
1253 | int ret = 0; | |
1254 | ||
1255 | if (IS_SWAPFILE(inode)) | |
1256 | goto out; | |
1257 | if (nfs_mapping_need_revalidate_inode(inode)) { | |
1258 | ret = -ECHILD; | |
1259 | goto out; | |
1260 | } | |
1261 | spin_lock(&inode->i_lock); | |
1262 | if (test_bit(NFS_INO_INVALIDATING, bitlock) || | |
1263 | (nfsi->cache_validity & NFS_INO_INVALID_DATA)) | |
1264 | ret = -ECHILD; | |
1265 | spin_unlock(&inode->i_lock); | |
1266 | out: | |
1267 | return ret; | |
1268 | } | |
1269 | ||
717d44e8 | 1270 | /** |
be527494 | 1271 | * nfs_revalidate_mapping - Revalidate the pagecache |
302fad7b TM |
1272 | * @inode: pointer to host inode |
1273 | * @mapping: pointer to mapping | |
717d44e8 | 1274 | */ |
be527494 TM |
1275 | int nfs_revalidate_mapping(struct inode *inode, |
1276 | struct address_space *mapping) | |
717d44e8 TM |
1277 | { |
1278 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1279 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1280 | int ret = 0; |
dc59250c | 1281 | |
29418aa4 MG |
1282 | /* swapfiles are not supposed to be shared. */ |
1283 | if (IS_SWAPFILE(inode)) | |
1284 | goto out; | |
1285 | ||
b4b1eadf | 1286 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1287 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1288 | if (ret < 0) | |
1289 | goto out; | |
7d52e862 | 1290 | } |
d529ef83 JL |
1291 | |
1292 | /* | |
1293 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1294 | * invalidations that come in while we're shooting down the mappings | |
1295 | * are respected. But, that leaves a race window where one revalidator | |
1296 | * can clear the flag, and then another checks it before the mapping | |
1297 | * gets invalidated. Fix that by serializing access to this part of | |
1298 | * the function. | |
1299 | * | |
1300 | * At the same time, we need to allow other tasks to see whether we | |
1301 | * might be in the middle of invalidating the pages, so we only set | |
1302 | * the bit lock here if it looks like we're going to be doing that. | |
1303 | */ | |
1304 | for (;;) { | |
74316201 N |
1305 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1306 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1307 | if (ret) |
1308 | goto out; | |
17dfeb91 TM |
1309 | spin_lock(&inode->i_lock); |
1310 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1311 | spin_unlock(&inode->i_lock); | |
1312 | continue; | |
1313 | } | |
1314 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1315 | break; |
d529ef83 | 1316 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1317 | goto out; |
f4ce1299 TM |
1318 | } |
1319 | ||
17dfeb91 | 1320 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1321 | smp_wmb(); |
1c341b77 TM |
1322 | nfsi->cache_validity &= ~(NFS_INO_INVALID_DATA| |
1323 | NFS_INO_DATA_INVAL_DEFER); | |
17dfeb91 TM |
1324 | spin_unlock(&inode->i_lock); |
1325 | trace_nfs_invalidate_mapping_enter(inode); | |
be527494 | 1326 | ret = nfs_invalidate_mapping(inode, mapping); |
17dfeb91 TM |
1327 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1328 | ||
d529ef83 | 1329 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1330 | smp_mb__after_atomic(); |
d529ef83 | 1331 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1332 | out: |
44b11874 | 1333 | return ret; |
7d52e862 TM |
1334 | } |
1335 | ||
ca0daa27 | 1336 | static bool nfs_file_has_writers(struct nfs_inode *nfsi) |
874f9463 | 1337 | { |
ca0daa27 TM |
1338 | struct inode *inode = &nfsi->vfs_inode; |
1339 | ||
ca0daa27 TM |
1340 | if (!S_ISREG(inode->i_mode)) |
1341 | return false; | |
1342 | if (list_empty(&nfsi->open_files)) | |
1343 | return false; | |
6ba0c4e5 | 1344 | return inode_is_open_for_write(inode); |
874f9463 TM |
1345 | } |
1346 | ||
651b0e70 | 1347 | static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi) |
874f9463 | 1348 | { |
651b0e70 | 1349 | return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi); |
874f9463 TM |
1350 | } |
1351 | ||
783b194c | 1352 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 | 1353 | { |
95582b00 DD |
1354 | struct timespec ts; |
1355 | ||
9e6e70f8 TM |
1356 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1357 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
c472c07b | 1358 | && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) { |
1eb5d98f | 1359 | inode_set_iversion_raw(inode, fattr->change_attr); |
70ca8852 | 1360 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1361 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
70ca8852 | 1362 | } |
a895b4a1 | 1363 | /* If we have atomic WCC data, we may update some attributes */ |
95582b00 | 1364 | ts = timespec64_to_timespec(inode->i_ctime); |
9e6e70f8 TM |
1365 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1366 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
95582b00 DD |
1367 | && timespec_equal(&ts, &fattr->pre_ctime)) { |
1368 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); | |
27dc1cd3 | 1369 | } |
9e6e70f8 | 1370 | |
95582b00 | 1371 | ts = timespec64_to_timespec(inode->i_mtime); |
9e6e70f8 TM |
1372 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) |
1373 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
95582b00 DD |
1374 | && timespec_equal(&ts, &fattr->pre_mtime)) { |
1375 | inode->i_mtime = timespec_to_timespec64(fattr->mtime); | |
27dc1cd3 | 1376 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1377 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
a895b4a1 | 1378 | } |
9e6e70f8 TM |
1379 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1380 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1381 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
a6b6d5b8 | 1382 | && !nfs_have_writebacks(inode)) { |
27dc1cd3 | 1383 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
27dc1cd3 | 1384 | } |
a895b4a1 TM |
1385 | } |
1386 | ||
1da177e4 | 1387 | /** |
33801147 | 1388 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
302fad7b TM |
1389 | * @inode: pointer to inode |
1390 | * @fattr: updated attributes | |
1da177e4 LT |
1391 | * |
1392 | * Verifies the attribute cache. If we have just changed the attributes, | |
1393 | * so that fattr carries weak cache consistency data, then it may | |
1394 | * also update the ctime/mtime/change_attribute. | |
1395 | */ | |
33801147 | 1396 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1397 | { |
1398 | struct nfs_inode *nfsi = NFS_I(inode); | |
1399 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1400 | unsigned long invalid = 0; |
95582b00 | 1401 | struct timespec ts; |
dc59250c | 1402 | |
4ebe83af | 1403 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
01da47bd | 1404 | return 0; |
4ebe83af | 1405 | |
eb3d8f42 TM |
1406 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) { |
1407 | /* Only a mounted-on-fileid? Just exit */ | |
1408 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1409 | return 0; | |
ca62b9c3 | 1410 | /* Has the inode gone and changed behind our back? */ |
eb3d8f42 | 1411 | } else if (nfsi->fileid != fattr->fileid) { |
7e10cc25 TM |
1412 | /* Is this perhaps the mounted-on fileid? */ |
1413 | if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) && | |
1414 | nfsi->fileid == fattr->mounted_on_fileid) | |
1415 | return 0; | |
cc89684c | 1416 | return -ESTALE; |
7e10cc25 | 1417 | } |
9e6e70f8 | 1418 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
cc89684c | 1419 | return -ESTALE; |
ca62b9c3 | 1420 | |
7e10cc25 | 1421 | |
651b0e70 | 1422 | if (!nfs_file_has_buffered_writers(nfsi)) { |
ca0daa27 | 1423 | /* Verify a few of the more important attributes */ |
c472c07b | 1424 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr)) |
16e14375 TM |
1425 | invalid |= NFS_INO_INVALID_CHANGE |
1426 | | NFS_INO_REVAL_PAGECACHE; | |
1da177e4 | 1427 | |
95582b00 DD |
1428 | ts = timespec64_to_timespec(inode->i_mtime); |
1429 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&ts, &fattr->mtime)) | |
16e14375 | 1430 | invalid |= NFS_INO_INVALID_MTIME; |
ca62b9c3 | 1431 | |
95582b00 DD |
1432 | ts = timespec64_to_timespec(inode->i_ctime); |
1433 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&ts, &fattr->ctime)) | |
16e14375 | 1434 | invalid |= NFS_INO_INVALID_CTIME; |
ca0daa27 TM |
1435 | |
1436 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { | |
1437 | cur_size = i_size_read(inode); | |
1438 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1439 | if (cur_size != new_isize) | |
16e14375 TM |
1440 | invalid |= NFS_INO_INVALID_SIZE |
1441 | | NFS_INO_REVAL_PAGECACHE; | |
ca0daa27 | 1442 | } |
9e6e70f8 | 1443 | } |
1da177e4 LT |
1444 | |
1445 | /* Have any file permissions changed? */ | |
9e6e70f8 | 1446 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
16e14375 TM |
1447 | invalid |= NFS_INO_INVALID_ACCESS |
1448 | | NFS_INO_INVALID_ACL | |
1449 | | NFS_INO_INVALID_OTHER; | |
9ff593c4 | 1450 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
16e14375 TM |
1451 | invalid |= NFS_INO_INVALID_ACCESS |
1452 | | NFS_INO_INVALID_ACL | |
1453 | | NFS_INO_INVALID_OTHER; | |
9ff593c4 | 1454 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
16e14375 TM |
1455 | invalid |= NFS_INO_INVALID_ACCESS |
1456 | | NFS_INO_INVALID_ACL | |
1457 | | NFS_INO_INVALID_OTHER; | |
1da177e4 LT |
1458 | |
1459 | /* Has the link count changed? */ | |
9e6e70f8 | 1460 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
16e14375 | 1461 | invalid |= NFS_INO_INVALID_OTHER; |
1da177e4 | 1462 | |
95582b00 DD |
1463 | ts = timespec64_to_timespec(inode->i_atime); |
1464 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&ts, &fattr->atime)) | |
2a3f5fd4 TM |
1465 | invalid |= NFS_INO_INVALID_ATIME; |
1466 | ||
1467 | if (invalid != 0) | |
4ebe83af | 1468 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1469 | |
33801147 | 1470 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1471 | return 0; |
1472 | } | |
1473 | ||
ae05f269 | 1474 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1475 | |
1476 | static unsigned long nfs_read_attr_generation_counter(void) | |
1477 | { | |
ae05f269 | 1478 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1479 | } |
1480 | ||
1481 | unsigned long nfs_inc_attr_generation_counter(void) | |
1482 | { | |
ae05f269 | 1483 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 | 1484 | } |
3235b403 | 1485 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
4704f0e2 TM |
1486 | |
1487 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1488 | { | |
1489 | fattr->valid = 0; | |
1490 | fattr->time_start = jiffies; | |
1491 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1492 | fattr->owner_name = NULL; |
1493 | fattr->group_name = NULL; | |
4704f0e2 | 1494 | } |
ddda8e0a | 1495 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1496 | |
140e049c TM |
1497 | /** |
1498 | * nfs_fattr_set_barrier | |
1499 | * @fattr: attributes | |
1500 | * | |
1501 | * Used to set a barrier after an attribute was updated. This | |
1502 | * barrier ensures that older attributes from RPC calls that may | |
1503 | * have raced with our update cannot clobber these new values. | |
1504 | * Note that you are still responsible for ensuring that other | |
1505 | * operations which change the attribute on the server do not | |
1506 | * collide. | |
1507 | */ | |
1508 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) | |
1509 | { | |
1510 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1511 | } | |
1512 | ||
2d36bfde TM |
1513 | struct nfs_fattr *nfs_alloc_fattr(void) |
1514 | { | |
1515 | struct nfs_fattr *fattr; | |
1516 | ||
1517 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1518 | if (fattr != NULL) | |
1519 | nfs_fattr_init(fattr); | |
1520 | return fattr; | |
1521 | } | |
ddda8e0a | 1522 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1523 | |
1524 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1525 | { | |
1526 | struct nfs_fh *fh; | |
1527 | ||
1528 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1529 | if (fh != NULL) | |
1530 | fh->size = 0; | |
1531 | return fh; | |
1532 | } | |
ddda8e0a | 1533 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1534 | |
e27d359e | 1535 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1536 | /* |
1537 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1538 | * in the same way that wireshark does | |
1539 | * | |
1540 | * @fh: file handle | |
1541 | * | |
1542 | * For debugging only. | |
1543 | */ | |
1544 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1545 | { | |
1546 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1547 | * not on the result */ | |
1264a2f0 | 1548 | return nfs_fhandle_hash(fh); |
d8e0539e | 1549 | } |
9e6ee76d | 1550 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1551 | |
1552 | /* | |
20d27e92 CL |
1553 | * _nfs_display_fhandle - display an NFS file handle on the console |
1554 | * | |
1555 | * @fh: file handle to display | |
1556 | * @caption: display caption | |
1557 | * | |
1558 | * For debugging only. | |
1559 | */ | |
20d27e92 CL |
1560 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1561 | { | |
1562 | unsigned short i; | |
1563 | ||
fa68a1ba | 1564 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1565 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1566 | return; | |
1567 | } | |
1568 | ||
d8e0539e WAA |
1569 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1570 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1571 | for (i = 0; i < fh->size; i += 16) { |
1572 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1573 | ||
1574 | switch ((fh->size - i - 1) >> 2) { | |
1575 | case 0: | |
1576 | printk(KERN_DEFAULT " %08x\n", | |
1577 | be32_to_cpup(pos)); | |
1578 | break; | |
1579 | case 1: | |
1580 | printk(KERN_DEFAULT " %08x %08x\n", | |
1581 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1582 | break; | |
1583 | case 2: | |
1584 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1585 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1586 | be32_to_cpup(pos + 2)); | |
1587 | break; | |
1588 | default: | |
1589 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1590 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1591 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1592 | } | |
1593 | } | |
1594 | } | |
9e6ee76d | 1595 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1596 | #endif |
1597 | ||
a10ad176 TM |
1598 | /** |
1599 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
302fad7b TM |
1600 | * @inode: pointer to inode |
1601 | * @fattr: attributes | |
a10ad176 TM |
1602 | * |
1603 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1604 | * attributes got scheduled after another call carrying updated ones. | |
1605 | * | |
1606 | * To do so, the function first assumes that a more recent ctime means | |
1607 | * that the attributes in fattr are newer, however it also attempt to | |
1608 | * catch the case where ctime either didn't change, or went backwards | |
1609 | * (if someone reset the clock on the server) by looking at whether | |
1610 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1611 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1612 | * |
1613 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1614 | * more recent than the ones cached in the inode. | |
1615 | * | |
1616 | */ | |
1617 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1618 | { | |
1619 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1620 | ||
4704f0e2 | 1621 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
4704f0e2 | 1622 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1623 | } |
1624 | ||
1625 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1626 | { | |
f4ce1299 TM |
1627 | int ret; |
1628 | ||
1629 | trace_nfs_refresh_inode_enter(inode); | |
1630 | ||
a10ad176 | 1631 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1632 | ret = nfs_update_inode(inode, fattr); |
1633 | else | |
1634 | ret = nfs_check_inode_attributes(inode, fattr); | |
1635 | ||
1636 | trace_nfs_refresh_inode_exit(inode, ret); | |
1637 | return ret; | |
870a5be8 TM |
1638 | } |
1639 | ||
33801147 TM |
1640 | /** |
1641 | * nfs_refresh_inode - try to update the inode attribute cache | |
302fad7b TM |
1642 | * @inode: pointer to inode |
1643 | * @fattr: updated attributes | |
33801147 TM |
1644 | * |
1645 | * Check that an RPC call that returned attributes has not overlapped with | |
1646 | * other recent updates of the inode metadata, then decide whether it is | |
1647 | * safe to do a full update of the inode attributes, or whether just to | |
1648 | * call nfs_check_inode_attributes. | |
1649 | */ | |
1650 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1651 | { | |
33801147 TM |
1652 | int status; |
1653 | ||
1654 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1655 | return 0; | |
1656 | spin_lock(&inode->i_lock); | |
870a5be8 | 1657 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1658 | spin_unlock(&inode->i_lock); |
ef79c097 | 1659 | |
33801147 TM |
1660 | return status; |
1661 | } | |
ddda8e0a | 1662 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1663 | |
16e14375 TM |
1664 | static int nfs_post_op_update_inode_locked(struct inode *inode, |
1665 | struct nfs_fattr *fattr, unsigned int invalid) | |
d65f557f | 1666 | { |
6edf9609 TM |
1667 | if (S_ISDIR(inode->i_mode)) |
1668 | invalid |= NFS_INO_INVALID_DATA; | |
1669 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1670 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1671 | return 0; | |
1672 | return nfs_refresh_inode_locked(inode, fattr); | |
1673 | } | |
1674 | ||
decf491f TM |
1675 | /** |
1676 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
302fad7b TM |
1677 | * @inode: pointer to inode |
1678 | * @fattr: updated attributes | |
decf491f TM |
1679 | * |
1680 | * After an operation that has changed the inode metadata, mark the | |
1681 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1682 | * |
1683 | * NB: if the server didn't return any post op attributes, this | |
1684 | * function will force the retrieval of attributes before the next | |
1685 | * NFS request. Thus it should be used only for operations that | |
1686 | * are expected to change one or more attributes, to avoid | |
1687 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1688 | */ |
1689 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1690 | { | |
d65f557f | 1691 | int status; |
decf491f | 1692 | |
7668fdbe | 1693 | spin_lock(&inode->i_lock); |
92d64e47 | 1694 | nfs_fattr_set_barrier(fattr); |
16e14375 TM |
1695 | status = nfs_post_op_update_inode_locked(inode, fattr, |
1696 | NFS_INO_INVALID_CHANGE | |
d554168f TM |
1697 | | NFS_INO_INVALID_CTIME |
1698 | | NFS_INO_REVAL_FORCED); | |
7668fdbe | 1699 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1700 | |
870a5be8 | 1701 | return status; |
decf491f | 1702 | } |
1c606fb7 | 1703 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1704 | |
70ca8852 | 1705 | /** |
a08a8cd3 | 1706 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
302fad7b TM |
1707 | * @inode: pointer to inode |
1708 | * @fattr: updated attributes | |
70ca8852 TM |
1709 | * |
1710 | * After an operation that has changed the inode metadata, mark the | |
1711 | * attribute cache as being invalid, then try to update it. Fake up | |
1712 | * weak cache consistency data, if none exist. | |
1713 | * | |
1714 | * This function is mainly designed to be used by the ->write_done() functions. | |
1715 | */ | |
a08a8cd3 | 1716 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
70ca8852 | 1717 | { |
d65f557f TM |
1718 | int status; |
1719 | ||
d65f557f TM |
1720 | /* Don't do a WCC update if these attributes are already stale */ |
1721 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1722 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1723 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1724 | | NFS_ATTR_FATTR_PRESIZE | |
1725 | | NFS_ATTR_FATTR_PREMTIME | |
1726 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1727 | goto out_noforce; |
1728 | } | |
9e6e70f8 TM |
1729 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1730 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
1eb5d98f | 1731 | fattr->pre_change_attr = inode_peek_iversion_raw(inode); |
9e6e70f8 | 1732 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1733 | } |
9e6e70f8 TM |
1734 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1735 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
95582b00 | 1736 | fattr->pre_ctime = timespec64_to_timespec(inode->i_ctime); |
9e6e70f8 TM |
1737 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1738 | } | |
1739 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1740 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
95582b00 | 1741 | fattr->pre_mtime = timespec64_to_timespec(inode->i_mtime); |
9e6e70f8 TM |
1742 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1743 | } | |
1744 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1745 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1746 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1747 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1748 | } |
d65f557f | 1749 | out_noforce: |
16e14375 TM |
1750 | status = nfs_post_op_update_inode_locked(inode, fattr, |
1751 | NFS_INO_INVALID_CHANGE | |
1752 | | NFS_INO_INVALID_CTIME | |
1753 | | NFS_INO_INVALID_MTIME); | |
a08a8cd3 TM |
1754 | return status; |
1755 | } | |
1756 | ||
1757 | /** | |
1758 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
302fad7b TM |
1759 | * @inode: pointer to inode |
1760 | * @fattr: updated attributes | |
a08a8cd3 TM |
1761 | * |
1762 | * After an operation that has changed the inode metadata, mark the | |
1763 | * attribute cache as being invalid, then try to update it. Fake up | |
1764 | * weak cache consistency data, if none exist. | |
1765 | * | |
1766 | * This function is mainly designed to be used by the ->write_done() functions. | |
1767 | */ | |
1768 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1769 | { | |
1770 | int status; | |
1771 | ||
1772 | spin_lock(&inode->i_lock); | |
8f8ba1d7 | 1773 | nfs_fattr_set_barrier(fattr); |
a08a8cd3 | 1774 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
d65f557f TM |
1775 | spin_unlock(&inode->i_lock); |
1776 | return status; | |
70ca8852 | 1777 | } |
ddda8e0a | 1778 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1779 | |
ea96d1ec | 1780 | |
1da177e4 LT |
1781 | /* |
1782 | * Many nfs protocol calls return the new file attributes after | |
1783 | * an operation. Here we update the inode to reflect the state | |
1784 | * of the server's inode. | |
1785 | * | |
1786 | * This is a bit tricky because we have to make sure all dirty pages | |
1787 | * have been sent off to the server before calling invalidate_inode_pages. | |
1788 | * To make sure no other process adds more write requests while we try | |
1789 | * our best to flush them, we make them sleep during the attribute refresh. | |
1790 | * | |
1791 | * A very similar scenario holds for the dir cache. | |
1792 | */ | |
24aa1fe6 | 1793 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1794 | { |
8b4bdcf8 | 1795 | struct nfs_server *server; |
1da177e4 | 1796 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1797 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1798 | unsigned long invalid = 0; |
3e7d950a | 1799 | unsigned long now = jiffies; |
62ab460c | 1800 | unsigned long save_cache_validity; |
651b0e70 | 1801 | bool have_writers = nfs_file_has_buffered_writers(nfsi); |
944171cb | 1802 | bool cache_revalidated = true; |
0b467264 | 1803 | bool attr_changed = false; |
c80d17c5 | 1804 | bool have_delegation; |
1da177e4 | 1805 | |
1e8968c5 | 1806 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1807 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1808 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1809 | atomic_read(&inode->i_count), fattr->valid); |
1810 | ||
eb3d8f42 TM |
1811 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) { |
1812 | /* Only a mounted-on-fileid? Just exit */ | |
1813 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1814 | return 0; | |
7e10cc25 | 1815 | /* Has the inode gone and changed behind our back? */ |
eb3d8f42 | 1816 | } else if (nfsi->fileid != fattr->fileid) { |
7e10cc25 TM |
1817 | /* Is this perhaps the mounted-on fileid? */ |
1818 | if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) && | |
1819 | nfsi->fileid == fattr->mounted_on_fileid) | |
1820 | return 0; | |
e73e6c9e MT |
1821 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
1822 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1823 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1824 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1825 | (long long)fattr->fileid); | |
1826 | goto out_err; | |
1827 | } | |
1da177e4 LT |
1828 | |
1829 | /* | |
1830 | * Make sure the inode's type hasn't changed. | |
1831 | */ | |
e73e6c9e MT |
1832 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1833 | /* | |
1834 | * Big trouble! The inode has become a different object. | |
1835 | */ | |
1e8968c5 | 1836 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1837 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1838 | goto out_err; | |
1839 | } | |
1da177e4 | 1840 | |
8b4bdcf8 | 1841 | server = NFS_SERVER(inode); |
a0356862 | 1842 | /* Update the fsid? */ |
9e6e70f8 | 1843 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1844 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1845 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1846 | server->fsid = fattr->fsid; |
1847 | ||
c80d17c5 TM |
1848 | /* Save the delegation state before clearing cache_validity */ |
1849 | have_delegation = nfs_have_delegated_attributes(inode); | |
1850 | ||
1da177e4 LT |
1851 | /* |
1852 | * Update the read time so we don't revalidate too often. | |
1853 | */ | |
33801147 | 1854 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1855 | |
62ab460c TM |
1856 | save_cache_validity = nfsi->cache_validity; |
1857 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1858 | | NFS_INO_INVALID_ATIME | |
1859 | | NFS_INO_REVAL_FORCED | |
1860 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1861 | |
a895b4a1 | 1862 | /* Do atomic weak cache consistency updates */ |
783b194c | 1863 | nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1864 | |
944171cb BC |
1865 | if (pnfs_layoutcommit_outstanding(inode)) { |
1866 | nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR; | |
1867 | cache_revalidated = false; | |
1868 | } | |
10b7e9ad | 1869 | |
47aabaa7 | 1870 | /* More cache consistency checks */ |
9e6e70f8 | 1871 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
c472c07b | 1872 | if (!inode_eq_iversion_raw(inode, fattr->change_attr)) { |
38512aa9 | 1873 | /* Could it be a race with writeback? */ |
c80d17c5 | 1874 | if (!(have_writers || have_delegation)) { |
0b467264 | 1875 | invalid |= NFS_INO_INVALID_DATA |
38512aa9 TM |
1876 | | NFS_INO_INVALID_ACCESS |
1877 | | NFS_INO_INVALID_ACL; | |
cac88f94 | 1878 | /* Force revalidate of all attributes */ |
16e14375 TM |
1879 | save_cache_validity |= NFS_INO_INVALID_CTIME |
1880 | | NFS_INO_INVALID_MTIME | |
1881 | | NFS_INO_INVALID_SIZE | |
1882 | | NFS_INO_INVALID_OTHER; | |
38512aa9 TM |
1883 | if (S_ISDIR(inode->i_mode)) |
1884 | nfs_force_lookup_revalidate(inode); | |
c80d17c5 TM |
1885 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1886 | inode->i_sb->s_id, | |
1887 | inode->i_ino); | |
1c341b77 TM |
1888 | } else if (!have_delegation) |
1889 | nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER; | |
1eb5d98f | 1890 | inode_set_iversion_raw(inode, fattr->change_attr); |
0b467264 | 1891 | attr_changed = true; |
9e6e70f8 | 1892 | } |
ade14a7d | 1893 | } else { |
8619ddd0 | 1894 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1895 | (NFS_INO_INVALID_CHANGE |
8619ddd0 TM |
1896 | | NFS_INO_REVAL_PAGECACHE |
1897 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1898 | cache_revalidated = false; |
1899 | } | |
9e6e70f8 TM |
1900 | |
1901 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
95582b00 | 1902 | inode->i_mtime = timespec_to_timespec64(fattr->mtime); |
ade14a7d | 1903 | } else if (server->caps & NFS_CAP_MTIME) { |
43b6535e | 1904 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1905 | (NFS_INO_INVALID_MTIME |
62ab460c | 1906 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1907 | cache_revalidated = false; |
1908 | } | |
62ab460c | 1909 | |
9e6e70f8 | 1910 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
95582b00 | 1911 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); |
ade14a7d | 1912 | } else if (server->caps & NFS_CAP_CTIME) { |
43b6535e | 1913 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1914 | (NFS_INO_INVALID_CTIME |
62ab460c | 1915 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1916 | cache_revalidated = false; |
1917 | } | |
47aabaa7 | 1918 | |
951a143b | 1919 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1920 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1921 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1922 | cur_isize = i_size_read(inode); | |
c80d17c5 | 1923 | if (new_isize != cur_isize && !have_delegation) { |
9e6e70f8 TM |
1924 | /* Do we perhaps have any outstanding writes, or has |
1925 | * the file grown beyond our last write? */ | |
a6b6d5b8 | 1926 | if (!nfs_have_writebacks(inode) || new_isize > cur_isize) { |
9e6e70f8 | 1927 | i_size_write(inode, new_isize); |
ca0daa27 | 1928 | if (!have_writers) |
16e14375 | 1929 | invalid |= NFS_INO_INVALID_DATA; |
0b467264 | 1930 | attr_changed = true; |
9e6e70f8 | 1931 | } |
60c16ea8 HJ |
1932 | dprintk("NFS: isize change on server for file %s/%ld " |
1933 | "(%Ld to %Ld)\n", | |
1934 | inode->i_sb->s_id, | |
1935 | inode->i_ino, | |
1936 | (long long)cur_isize, | |
1937 | (long long)new_isize); | |
1da177e4 | 1938 | } |
ade14a7d | 1939 | } else { |
43b6535e | 1940 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1941 | (NFS_INO_INVALID_SIZE |
62ab460c TM |
1942 | | NFS_INO_REVAL_PAGECACHE |
1943 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1944 | cache_revalidated = false; |
1945 | } | |
1da177e4 | 1946 | |
1da177e4 | 1947 | |
9e6e70f8 | 1948 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
95582b00 | 1949 | inode->i_atime = timespec_to_timespec64(fattr->atime); |
ade14a7d | 1950 | else if (server->caps & NFS_CAP_ATIME) { |
43b6535e TM |
1951 | nfsi->cache_validity |= save_cache_validity & |
1952 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1953 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1954 | cache_revalidated = false; |
1955 | } | |
1da177e4 | 1956 | |
9e6e70f8 TM |
1957 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1958 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1959 | umode_t newmode = inode->i_mode & S_IFMT; |
1960 | newmode |= fattr->mode & S_IALLUGO; | |
1961 | inode->i_mode = newmode; | |
16e14375 | 1962 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 TM |
1963 | | NFS_INO_INVALID_ACL; |
1964 | attr_changed = true; | |
9e6e70f8 | 1965 | } |
ade14a7d | 1966 | } else if (server->caps & NFS_CAP_MODE) { |
43b6535e | 1967 | nfsi->cache_validity |= save_cache_validity & |
0b467264 | 1968 | (NFS_INO_INVALID_OTHER |
62ab460c | 1969 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1970 | cache_revalidated = false; |
1971 | } | |
62ab460c | 1972 | |
9e6e70f8 | 1973 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1974 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
16e14375 | 1975 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 | 1976 | | NFS_INO_INVALID_ACL; |
9e6e70f8 | 1977 | inode->i_uid = fattr->uid; |
0b467264 | 1978 | attr_changed = true; |
9e6e70f8 | 1979 | } |
ade14a7d | 1980 | } else if (server->caps & NFS_CAP_OWNER) { |
43b6535e | 1981 | nfsi->cache_validity |= save_cache_validity & |
0b467264 | 1982 | (NFS_INO_INVALID_OTHER |
62ab460c | 1983 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1984 | cache_revalidated = false; |
1985 | } | |
62ab460c | 1986 | |
9e6e70f8 | 1987 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1988 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
16e14375 | 1989 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 | 1990 | | NFS_INO_INVALID_ACL; |
9e6e70f8 | 1991 | inode->i_gid = fattr->gid; |
0b467264 | 1992 | attr_changed = true; |
9e6e70f8 | 1993 | } |
ade14a7d | 1994 | } else if (server->caps & NFS_CAP_OWNER_GROUP) { |
43b6535e | 1995 | nfsi->cache_validity |= save_cache_validity & |
0b467264 | 1996 | (NFS_INO_INVALID_OTHER |
62ab460c | 1997 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1998 | cache_revalidated = false; |
1999 | } | |
921615f1 | 2000 | |
9e6e70f8 TM |
2001 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
2002 | if (inode->i_nlink != fattr->nlink) { | |
9e6e70f8 TM |
2003 | if (S_ISDIR(inode->i_mode)) |
2004 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 2005 | set_nlink(inode, fattr->nlink); |
0b467264 | 2006 | attr_changed = true; |
9e6e70f8 | 2007 | } |
ade14a7d | 2008 | } else if (server->caps & NFS_CAP_NLINK) { |
43b6535e | 2009 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 2010 | (NFS_INO_INVALID_OTHER |
62ab460c | 2011 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
2012 | cache_revalidated = false; |
2013 | } | |
1da177e4 | 2014 | |
9e6e70f8 | 2015 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
2016 | /* |
2017 | * report the blocks in 512byte units | |
2018 | */ | |
2019 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
ade14a7d | 2020 | } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
9e6e70f8 | 2021 | inode->i_blocks = fattr->du.nfs2.blocks; |
ade14a7d TM |
2022 | else |
2023 | cache_revalidated = false; | |
1da177e4 LT |
2024 | |
2025 | /* Update attrtimeo value if we're out of the unstable period */ | |
0b467264 | 2026 | if (attr_changed) { |
cac88f94 | 2027 | invalid &= ~NFS_INO_INVALID_ATTR; |
91d5b470 | 2028 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 2029 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 2030 | nfsi->attrtimeo_timestamp = now; |
f5062003 | 2031 | /* Set barrier to be more recent than all outstanding updates */ |
4704f0e2 | 2032 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 2033 | } else { |
ade14a7d TM |
2034 | if (cache_revalidated) { |
2035 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, | |
2036 | nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { | |
2037 | nfsi->attrtimeo <<= 1; | |
2038 | if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode)) | |
2039 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
2040 | } | |
6d2b2966 TM |
2041 | nfsi->attrtimeo_timestamp = now; |
2042 | } | |
f5062003 TM |
2043 | /* Set the barrier to be more recent than this fattr */ |
2044 | if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) | |
2045 | nfsi->attr_gencount = fattr->gencount; | |
1da177e4 | 2046 | } |
c812012f | 2047 | |
1da177e4 LT |
2048 | /* Don't invalidate the data if we were to blame */ |
2049 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
2050 | || S_ISLNK(inode->i_mode))) | |
2051 | invalid &= ~NFS_INO_INVALID_DATA; | |
c80d17c5 | 2052 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 2053 | |
1da177e4 | 2054 | return 0; |
b37b03b7 | 2055 | out_err: |
1da177e4 LT |
2056 | /* |
2057 | * No need to worry about unhashing the dentry, as the | |
2058 | * lookup validation will know that the inode is bad. | |
2059 | * (But we fall through to invalidate the caches.) | |
2060 | */ | |
2061 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
2062 | return -ESTALE; |
2063 | } | |
2064 | ||
f7b422b1 | 2065 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
2066 | { |
2067 | struct nfs_inode *nfsi; | |
c456aacf | 2068 | nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
2069 | if (!nfsi) |
2070 | return NULL; | |
55296809 CL |
2071 | nfsi->flags = 0UL; |
2072 | nfsi->cache_validity = 0UL; | |
89d77c8f | 2073 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
2074 | nfsi->nfs4_acl = NULL; |
2075 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
2076 | return &nfsi->vfs_inode; |
2077 | } | |
89d77c8f | 2078 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 2079 | |
ca1a199e | 2080 | void nfs_free_inode(struct inode *inode) |
1da177e4 LT |
2081 | { |
2082 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
2083 | } | |
ca1a199e | 2084 | EXPORT_SYMBOL_GPL(nfs_free_inode); |
fa0d7e3d | 2085 | |
d75d5414 AM |
2086 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
2087 | { | |
89d77c8f | 2088 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
2089 | INIT_LIST_HEAD(&nfsi->open_states); |
2090 | nfsi->delegation = NULL; | |
d75d5414 | 2091 | init_rwsem(&nfsi->rwsem); |
e5e94017 | 2092 | nfsi->layout = NULL; |
d75d5414 AM |
2093 | #endif |
2094 | } | |
f7b422b1 | 2095 | |
51cc5068 | 2096 | static void init_once(void *foo) |
1da177e4 LT |
2097 | { |
2098 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
2099 | ||
a35afb83 | 2100 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
2101 | INIT_LIST_HEAD(&nfsi->open_files); |
2102 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
2103 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 2104 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a6b6d5b8 | 2105 | atomic_long_set(&nfsi->nrequests, 0); |
5cb953d4 | 2106 | atomic_long_set(&nfsi->commit_info.ncommit, 0); |
1a0de48a | 2107 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
884be175 | 2108 | init_rwsem(&nfsi->rmdir_sem); |
e824f99a | 2109 | mutex_init(&nfsi->commit_mutex); |
a35afb83 | 2110 | nfs4_init_once(nfsi); |
1da177e4 | 2111 | } |
20c2df83 | 2112 | |
f7b422b1 | 2113 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
2114 | { |
2115 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
2116 | sizeof(struct nfs_inode), | |
fffb60f9 | 2117 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 2118 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 2119 | init_once); |
1da177e4 LT |
2120 | if (nfs_inode_cachep == NULL) |
2121 | return -ENOMEM; | |
2122 | ||
2123 | return 0; | |
2124 | } | |
2125 | ||
266bee88 | 2126 | static void nfs_destroy_inodecache(void) |
1da177e4 | 2127 | { |
8c0a8537 KS |
2128 | /* |
2129 | * Make sure all delayed rcu free inodes are flushed before we | |
2130 | * destroy cache. | |
2131 | */ | |
2132 | rcu_barrier(); | |
1a1d92c1 | 2133 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
2134 | } |
2135 | ||
5746006f | 2136 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 2137 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
2138 | |
2139 | /* | |
2140 | * start up the nfsiod workqueue | |
2141 | */ | |
2142 | static int nfsiod_start(void) | |
2143 | { | |
2144 | struct workqueue_struct *wq; | |
2145 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 2146 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
2147 | if (wq == NULL) |
2148 | return -ENOMEM; | |
2149 | nfsiod_workqueue = wq; | |
2150 | return 0; | |
2151 | } | |
2152 | ||
2153 | /* | |
2154 | * Destroy the nfsiod workqueue | |
2155 | */ | |
2156 | static void nfsiod_stop(void) | |
2157 | { | |
2158 | struct workqueue_struct *wq; | |
2159 | ||
2160 | wq = nfsiod_workqueue; | |
2161 | if (wq == NULL) | |
2162 | return; | |
2163 | nfsiod_workqueue = NULL; | |
2164 | destroy_workqueue(wq); | |
2165 | } | |
2166 | ||
c7d03a00 | 2167 | unsigned int nfs_net_id; |
9e2e74db | 2168 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
2169 | |
2170 | static int nfs_net_init(struct net *net) | |
2171 | { | |
6b13168b | 2172 | nfs_clients_init(net); |
65b38851 | 2173 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
2174 | } |
2175 | ||
2176 | static void nfs_net_exit(struct net *net) | |
2177 | { | |
65b38851 | 2178 | nfs_fs_proc_net_exit(net); |
10b7a70c | 2179 | nfs_clients_exit(net); |
1b340d01 SK |
2180 | } |
2181 | ||
2182 | static struct pernet_operations nfs_net_ops = { | |
2183 | .init = nfs_net_init, | |
2184 | .exit = nfs_net_exit, | |
2185 | .id = &nfs_net_id, | |
2186 | .size = sizeof(struct nfs_net), | |
2187 | }; | |
2188 | ||
1da177e4 LT |
2189 | /* |
2190 | * Initialize NFS | |
2191 | */ | |
2192 | static int __init init_nfs_fs(void) | |
2193 | { | |
2194 | int err; | |
2195 | ||
996bc4f4 TM |
2196 | err = nfs_sysfs_init(); |
2197 | if (err < 0) | |
2198 | goto out10; | |
2199 | ||
1b340d01 | 2200 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 2201 | if (err < 0) |
89d77c8f | 2202 | goto out9; |
e571cbf1 | 2203 | |
8ec442ae DH |
2204 | err = nfs_fscache_register(); |
2205 | if (err < 0) | |
89d77c8f | 2206 | goto out8; |
8ec442ae | 2207 | |
5746006f TM |
2208 | err = nfsiod_start(); |
2209 | if (err) | |
89d77c8f | 2210 | goto out7; |
5746006f | 2211 | |
6aaca566 DH |
2212 | err = nfs_fs_proc_init(); |
2213 | if (err) | |
89d77c8f | 2214 | goto out6; |
6aaca566 | 2215 | |
1da177e4 LT |
2216 | err = nfs_init_nfspagecache(); |
2217 | if (err) | |
89d77c8f | 2218 | goto out5; |
1da177e4 LT |
2219 | |
2220 | err = nfs_init_inodecache(); | |
2221 | if (err) | |
89d77c8f | 2222 | goto out4; |
1da177e4 LT |
2223 | |
2224 | err = nfs_init_readpagecache(); | |
2225 | if (err) | |
89d77c8f | 2226 | goto out3; |
1da177e4 LT |
2227 | |
2228 | err = nfs_init_writepagecache(); | |
2229 | if (err) | |
89d77c8f | 2230 | goto out2; |
1da177e4 | 2231 | |
1da177e4 LT |
2232 | err = nfs_init_directcache(); |
2233 | if (err) | |
89d77c8f | 2234 | goto out1; |
1da177e4 | 2235 | |
ec7652aa | 2236 | rpc_proc_register(&init_net, &nfs_rpcstat); |
cd738ee9 KM |
2237 | |
2238 | err = register_nfs_fs(); | |
2239 | if (err) | |
129d1977 BS |
2240 | goto out0; |
2241 | ||
1da177e4 | 2242 | return 0; |
129d1977 | 2243 | out0: |
ec7652aa | 2244 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2245 | nfs_destroy_directcache(); |
89d77c8f | 2246 | out1: |
129d1977 | 2247 | nfs_destroy_writepagecache(); |
89d77c8f | 2248 | out2: |
129d1977 | 2249 | nfs_destroy_readpagecache(); |
89d77c8f | 2250 | out3: |
129d1977 | 2251 | nfs_destroy_inodecache(); |
89d77c8f | 2252 | out4: |
129d1977 | 2253 | nfs_destroy_nfspagecache(); |
89d77c8f | 2254 | out5: |
129d1977 | 2255 | nfs_fs_proc_exit(); |
89d77c8f | 2256 | out6: |
129d1977 | 2257 | nfsiod_stop(); |
89d77c8f | 2258 | out7: |
129d1977 | 2259 | nfs_fscache_unregister(); |
89d77c8f | 2260 | out8: |
129d1977 | 2261 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 2262 | out9: |
996bc4f4 TM |
2263 | nfs_sysfs_exit(); |
2264 | out10: | |
1da177e4 LT |
2265 | return err; |
2266 | } | |
2267 | ||
2268 | static void __exit exit_nfs_fs(void) | |
2269 | { | |
1da177e4 | 2270 | nfs_destroy_directcache(); |
1da177e4 LT |
2271 | nfs_destroy_writepagecache(); |
2272 | nfs_destroy_readpagecache(); | |
2273 | nfs_destroy_inodecache(); | |
2274 | nfs_destroy_nfspagecache(); | |
8ec442ae | 2275 | nfs_fscache_unregister(); |
1b340d01 | 2276 | unregister_pernet_subsys(&nfs_net_ops); |
ec7652aa | 2277 | rpc_proc_unregister(&init_net, "nfs"); |
f7b422b1 | 2278 | unregister_nfs_fs(); |
6aaca566 | 2279 | nfs_fs_proc_exit(); |
5746006f | 2280 | nfsiod_stop(); |
996bc4f4 | 2281 | nfs_sysfs_exit(); |
1da177e4 LT |
2282 | } |
2283 | ||
2284 | /* Not quite true; I just maintain it */ | |
2285 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2286 | MODULE_LICENSE("GPL"); | |
f43bf0be | 2287 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
2288 | |
2289 | module_init(init_nfs_fs) | |
2290 | module_exit(exit_nfs_fs) |