Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/init.h> | |
174cd4b1 | 18 | #include <linux/sched/signal.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
1da177e4 | 35 | #include <linux/vfs.h> |
9cdb3883 MN |
36 | #include <linux/inet.h> |
37 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
3fa0b4e2 | 39 | #include <linux/compat.h> |
d310310c | 40 | #include <linux/freezer.h> |
7c0f6ba6 | 41 | #include <linux/uaccess.h> |
1eb5d98f | 42 | #include <linux/iversion.h> |
1da177e4 | 43 | |
4ce79717 | 44 | #include "nfs4_fs.h" |
a72b4422 | 45 | #include "callback.h" |
1da177e4 | 46 | #include "delegation.h" |
d9ef5a8c | 47 | #include "iostat.h" |
f7b422b1 | 48 | #include "internal.h" |
8ec442ae | 49 | #include "fscache.h" |
e5e94017 | 50 | #include "pnfs.h" |
ab7017a3 | 51 | #include "nfs.h" |
1b340d01 | 52 | #include "netns.h" |
1da177e4 | 53 | |
f4ce1299 TM |
54 | #include "nfstrace.h" |
55 | ||
1da177e4 | 56 | #define NFSDBG_FACILITY NFSDBG_VFS |
1da177e4 | 57 | |
f43bf0be TM |
58 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
59 | ||
60 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 61 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 62 | |
1da177e4 | 63 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 64 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 65 | |
e18b890b | 66 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 67 | |
1da177e4 LT |
68 | static inline unsigned long |
69 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
70 | { | |
71 | return nfs_fileid_to_ino_t(fattr->fileid); | |
72 | } | |
73 | ||
210c7c17 | 74 | static int nfs_wait_killable(int mode) |
72cb77f4 | 75 | { |
416ad3c9 | 76 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
77 | if (signal_pending_state(mode, current)) |
78 | return -ERESTARTSYS; | |
72cb77f4 TM |
79 | return 0; |
80 | } | |
210c7c17 BC |
81 | |
82 | int nfs_wait_bit_killable(struct wait_bit_key *key, int mode) | |
83 | { | |
84 | return nfs_wait_killable(mode); | |
85 | } | |
89d77c8f | 86 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 87 | |
f43bf0be TM |
88 | /** |
89 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
90 | * @fileid: 64-bit fileid | |
91 | * | |
92 | * This function returns a 32-bit inode number if the boot parameter | |
93 | * nfs.enable_ino64 is zero. | |
94 | */ | |
95 | u64 nfs_compat_user_ino64(u64 fileid) | |
96 | { | |
3fa0b4e2 FF |
97 | #ifdef CONFIG_COMPAT |
98 | compat_ulong_t ino; | |
99 | #else | |
100 | unsigned long ino; | |
101 | #endif | |
f43bf0be TM |
102 | |
103 | if (enable_ino64) | |
104 | return fileid; | |
105 | ino = fileid; | |
106 | if (sizeof(ino) < sizeof(fileid)) | |
107 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
108 | return ino; | |
109 | } | |
110 | ||
eed99357 TM |
111 | int nfs_drop_inode(struct inode *inode) |
112 | { | |
113 | return NFS_STALE(inode) || generic_drop_inode(inode); | |
114 | } | |
115 | EXPORT_SYMBOL_GPL(nfs_drop_inode); | |
116 | ||
19d87ca3 | 117 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 118 | { |
da6d503a TM |
119 | /* |
120 | * The following should never happen... | |
121 | */ | |
f48407dd TM |
122 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
123 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); | |
ada70d94 | 124 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 125 | nfs_access_zap_cache(inode); |
f1fe29b4 | 126 | nfs_fscache_clear_inode(inode); |
1da177e4 | 127 | } |
89d77c8f | 128 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 129 | |
b57922d9 AV |
130 | void nfs_evict_inode(struct inode *inode) |
131 | { | |
91b0abe3 | 132 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 133 | clear_inode(inode); |
b57922d9 AV |
134 | nfs_clear_inode(inode); |
135 | } | |
136 | ||
9e1681c2 | 137 | int nfs_sync_inode(struct inode *inode) |
4d346bea | 138 | { |
95d9f6c3 | 139 | inode_dio_wait(inode); |
4d346bea TM |
140 | return nfs_wb_all(inode); |
141 | } | |
9e1681c2 | 142 | EXPORT_SYMBOL_GPL(nfs_sync_inode); |
4d346bea | 143 | |
29884df0 TM |
144 | /** |
145 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
146 | */ | |
147 | int nfs_sync_mapping(struct address_space *mapping) | |
148 | { | |
5cf95214 | 149 | int ret = 0; |
29884df0 | 150 | |
5cf95214 TM |
151 | if (mapping->nrpages != 0) { |
152 | unmap_mapping_range(mapping, 0, 0, 0); | |
153 | ret = nfs_wb_all(mapping->host); | |
154 | } | |
29884df0 TM |
155 | return ret; |
156 | } | |
157 | ||
187e593d TM |
158 | static int nfs_attribute_timeout(struct inode *inode) |
159 | { | |
160 | struct nfs_inode *nfsi = NFS_I(inode); | |
161 | ||
162 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); | |
163 | } | |
164 | ||
61540bf6 TM |
165 | static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags) |
166 | { | |
167 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
168 | ||
169 | /* Special case for the pagecache or access cache */ | |
170 | if (flags == NFS_INO_REVAL_PAGECACHE && | |
171 | !(cache_validity & NFS_INO_REVAL_FORCED)) | |
172 | return false; | |
173 | return (cache_validity & flags) != 0; | |
174 | } | |
175 | ||
176 | static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags) | |
177 | { | |
178 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
179 | ||
180 | if ((cache_validity & flags) != 0) | |
181 | return true; | |
182 | if (nfs_attribute_timeout(inode)) | |
183 | return true; | |
184 | return false; | |
185 | } | |
186 | ||
187 | bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags) | |
188 | { | |
189 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) | |
190 | return nfs_check_cache_invalid_delegated(inode, flags); | |
191 | ||
192 | return nfs_check_cache_invalid_not_delegated(inode, flags); | |
193 | } | |
194 | ||
6edf9609 TM |
195 | static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags) |
196 | { | |
197 | struct nfs_inode *nfsi = NFS_I(inode); | |
3f0b3cf4 TM |
198 | bool have_delegation = NFS_PROTO(inode)->have_delegation(inode, FMODE_READ); |
199 | ||
200 | if (have_delegation) { | |
201 | if (!(flags & NFS_INO_REVAL_FORCED)) | |
202 | flags &= ~NFS_INO_INVALID_OTHER; | |
203 | flags &= ~(NFS_INO_INVALID_CHANGE | |
204 | | NFS_INO_INVALID_SIZE | |
205 | | NFS_INO_REVAL_PAGECACHE); | |
206 | } | |
6edf9609 TM |
207 | |
208 | if (inode->i_mapping->nrpages == 0) | |
209 | flags &= ~NFS_INO_INVALID_DATA; | |
210 | nfsi->cache_validity |= flags; | |
211 | if (flags & NFS_INO_INVALID_DATA) | |
212 | nfs_fscache_invalidate(inode); | |
213 | } | |
214 | ||
1da177e4 LT |
215 | /* |
216 | * Invalidate the local caches | |
217 | */ | |
b37b03b7 | 218 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
219 | { |
220 | struct nfs_inode *nfsi = NFS_I(inode); | |
221 | int mode = inode->i_mode; | |
222 | ||
91d5b470 CL |
223 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
224 | ||
c7c20973 TM |
225 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
226 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 227 | |
c3f52af3 | 228 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
de242c0b | 229 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
6edf9609 | 230 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
231 | | NFS_INO_INVALID_DATA |
232 | | NFS_INO_INVALID_ACCESS | |
233 | | NFS_INO_INVALID_ACL | |
6edf9609 | 234 | | NFS_INO_REVAL_PAGECACHE); |
aa9c2669 | 235 | } else |
6edf9609 | 236 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
237 | | NFS_INO_INVALID_ACCESS |
238 | | NFS_INO_INVALID_ACL | |
6edf9609 | 239 | | NFS_INO_REVAL_PAGECACHE); |
fd1defc2 | 240 | nfs_zap_label_cache_locked(nfsi); |
b37b03b7 | 241 | } |
dc59250c | 242 | |
b37b03b7 TM |
243 | void nfs_zap_caches(struct inode *inode) |
244 | { | |
245 | spin_lock(&inode->i_lock); | |
246 | nfs_zap_caches_locked(inode); | |
dc59250c | 247 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
248 | } |
249 | ||
cd9ae2b6 TM |
250 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
251 | { | |
252 | if (mapping->nrpages != 0) { | |
253 | spin_lock(&inode->i_lock); | |
6edf9609 | 254 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
cd9ae2b6 TM |
255 | spin_unlock(&inode->i_lock); |
256 | } | |
257 | } | |
258 | ||
f41f7418 | 259 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
260 | { |
261 | void (*clear_acl_cache)(struct inode *); | |
262 | ||
263 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
264 | if (clear_acl_cache != NULL) | |
265 | clear_acl_cache(inode); | |
dc59250c | 266 | spin_lock(&inode->i_lock); |
55296809 | 267 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 268 | spin_unlock(&inode->i_lock); |
1da177e4 | 269 | } |
1c606fb7 | 270 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 271 | |
c4812998 TM |
272 | void nfs_invalidate_atime(struct inode *inode) |
273 | { | |
274 | spin_lock(&inode->i_lock); | |
6edf9609 | 275 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
c4812998 TM |
276 | spin_unlock(&inode->i_lock); |
277 | } | |
ddda8e0a | 278 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 279 | |
1da177e4 | 280 | /* |
b37b03b7 TM |
281 | * Invalidate, but do not unhash, the inode. |
282 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 283 | */ |
b37b03b7 | 284 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 285 | { |
3a10c30a | 286 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 287 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
288 | } |
289 | ||
290 | struct nfs_find_desc { | |
291 | struct nfs_fh *fh; | |
292 | struct nfs_fattr *fattr; | |
293 | }; | |
294 | ||
295 | /* | |
296 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
297 | * this, and re-exported directories (also seen in NFSv2) | |
298 | * we are forced to allow 2 different inodes to have the same | |
299 | * i_ino. | |
300 | */ | |
301 | static int | |
302 | nfs_find_actor(struct inode *inode, void *opaque) | |
303 | { | |
304 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
305 | struct nfs_fh *fh = desc->fh; | |
306 | struct nfs_fattr *fattr = desc->fattr; | |
307 | ||
308 | if (NFS_FILEID(inode) != fattr->fileid) | |
309 | return 0; | |
f6488c9b JL |
310 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
311 | return 0; | |
1da177e4 LT |
312 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
313 | return 0; | |
314 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
315 | return 0; | |
316 | return 1; | |
317 | } | |
318 | ||
319 | static int | |
320 | nfs_init_locked(struct inode *inode, void *opaque) | |
321 | { | |
322 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
323 | struct nfs_fattr *fattr = desc->fattr; | |
324 | ||
99fadcd7 | 325 | set_nfs_fileid(inode, fattr->fileid); |
916ec34d | 326 | inode->i_mode = fattr->mode; |
1da177e4 LT |
327 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
328 | return 0; | |
329 | } | |
330 | ||
e058f70b | 331 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
fd1defc2 TM |
332 | static void nfs_clear_label_invalid(struct inode *inode) |
333 | { | |
334 | spin_lock(&inode->i_lock); | |
335 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; | |
336 | spin_unlock(&inode->i_lock); | |
337 | } | |
338 | ||
aa9c2669 DQ |
339 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
340 | struct nfs4_label *label) | |
341 | { | |
342 | int error; | |
343 | ||
344 | if (label == NULL) | |
345 | return; | |
346 | ||
aa9c2669 DQ |
347 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
348 | error = security_inode_notifysecctx(inode, label->label, | |
349 | label->len); | |
350 | if (error) | |
351 | printk(KERN_ERR "%s() %s %d " | |
352 | "security_inode_notifysecctx() %d\n", | |
353 | __func__, | |
354 | (char *)label->label, | |
355 | label->len, error); | |
fd1defc2 | 356 | nfs_clear_label_invalid(inode); |
aa9c2669 DQ |
357 | } |
358 | } | |
359 | ||
e058f70b SD |
360 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
361 | { | |
362 | struct nfs4_label *label = NULL; | |
363 | int minor_version = server->nfs_client->cl_minorversion; | |
364 | ||
365 | if (minor_version < 2) | |
366 | return label; | |
367 | ||
368 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
369 | return label; | |
370 | ||
371 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
372 | if (label == NULL) | |
373 | return ERR_PTR(-ENOMEM); | |
374 | ||
375 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
376 | if (label->label == NULL) { | |
377 | kfree(label); | |
378 | return ERR_PTR(-ENOMEM); | |
379 | } | |
380 | label->len = NFS4_MAXLABELLEN; | |
381 | ||
382 | return label; | |
383 | } | |
384 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 385 | #else |
829e57d7 | 386 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
aa9c2669 DQ |
387 | struct nfs4_label *label) |
388 | { | |
389 | } | |
e058f70b | 390 | #endif |
aa9c2669 | 391 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 392 | |
f174ff7a PT |
393 | /* Search for inode identified by fh, fileid and i_mode in inode cache. */ |
394 | struct inode * | |
395 | nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh) | |
396 | { | |
397 | struct nfs_find_desc desc = { | |
398 | .fh = fh, | |
399 | .fattr = fattr, | |
400 | }; | |
401 | struct inode *inode; | |
402 | unsigned long hash; | |
403 | ||
404 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) || | |
405 | !(fattr->valid & NFS_ATTR_FATTR_TYPE)) | |
406 | return NULL; | |
407 | ||
408 | hash = nfs_fattr_to_ino_t(fattr); | |
409 | inode = ilookup5(sb, hash, nfs_find_actor, &desc); | |
410 | ||
411 | dprintk("%s: returning %p\n", __func__, inode); | |
412 | return inode; | |
413 | } | |
414 | ||
1da177e4 LT |
415 | /* |
416 | * This is our front-end to iget that looks up inodes by file handle | |
417 | * instead of inode number. | |
418 | */ | |
419 | struct inode * | |
1775fd3e | 420 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
421 | { |
422 | struct nfs_find_desc desc = { | |
423 | .fh = fh, | |
424 | .fattr = fattr | |
425 | }; | |
03f28e3a | 426 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
427 | unsigned long hash; |
428 | ||
7ebb9315 BS |
429 | nfs_attr_check_mountpoint(sb, fattr); |
430 | ||
2ef47eb1 AS |
431 | if (nfs_attr_use_mounted_on_fileid(fattr)) |
432 | fattr->fileid = fattr->mounted_on_fileid; | |
433 | else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) | |
1da177e4 | 434 | goto out_no_inode; |
9e6e70f8 | 435 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 436 | goto out_no_inode; |
1da177e4 LT |
437 | |
438 | hash = nfs_fattr_to_ino_t(fattr); | |
439 | ||
03f28e3a TM |
440 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
441 | if (inode == NULL) { | |
442 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 443 | goto out_no_inode; |
03f28e3a | 444 | } |
1da177e4 LT |
445 | |
446 | if (inode->i_state & I_NEW) { | |
447 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 448 | unsigned long now = jiffies; |
1da177e4 LT |
449 | |
450 | /* We set i_ino for the few things that still rely on it, | |
451 | * such as stat(2) */ | |
452 | inode->i_ino = hash; | |
453 | ||
454 | /* We can't support update_atime(), since the server will reset it */ | |
455 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
456 | inode->i_mode = fattr->mode; | |
821a868a | 457 | nfsi->cache_validity = 0; |
62ab460c TM |
458 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
459 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
16e14375 | 460 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
1da177e4 LT |
461 | /* Why so? Because we want revalidate for devices/FIFOs, and |
462 | * that's precisely what we have in nfs_file_inode_operations. | |
463 | */ | |
8fa5c000 | 464 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 465 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 466 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 | 467 | inode->i_data.a_ops = &nfs_file_aops; |
1da177e4 | 468 | } else if (S_ISDIR(inode->i_mode)) { |
8fa5c000 | 469 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 470 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 471 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 472 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
473 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
474 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
475 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
476 | inode->i_op = &nfs_referral_inode_operations; | |
477 | else | |
478 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 479 | inode->i_fop = NULL; |
36d43a43 | 480 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 481 | } |
21fc61c7 | 482 | } else if (S_ISLNK(inode->i_mode)) { |
1da177e4 | 483 | inode->i_op = &nfs_symlink_inode_operations; |
21fc61c7 AV |
484 | inode_nohighmem(inode); |
485 | } else | |
1da177e4 LT |
486 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
487 | ||
9e6e70f8 TM |
488 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
489 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
490 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
1eb5d98f | 491 | inode_set_iversion_raw(inode, 0); |
9e6e70f8 | 492 | inode->i_size = 0; |
6d6b77f1 | 493 | clear_nlink(inode); |
9ff593c4 EB |
494 | inode->i_uid = make_kuid(&init_user_ns, -2); |
495 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
496 | inode->i_blocks = 0; |
497 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
498 | nfsi->write_io = 0; |
499 | nfsi->read_io = 0; | |
9e6e70f8 | 500 | |
33801147 | 501 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 502 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 | 503 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
95582b00 | 504 | inode->i_atime = timespec_to_timespec64(fattr->atime); |
62ab460c | 505 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
16e14375 | 506 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
9e6e70f8 | 507 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
95582b00 | 508 | inode->i_mtime = timespec_to_timespec64(fattr->mtime); |
62ab460c | 509 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
16e14375 | 510 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); |
9e6e70f8 | 511 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
95582b00 | 512 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); |
62ab460c | 513 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
16e14375 | 514 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME); |
9e6e70f8 | 515 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1eb5d98f | 516 | inode_set_iversion_raw(inode, fattr->change_attr); |
cd812599 | 517 | else |
16e14375 | 518 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE); |
9e6e70f8 TM |
519 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
520 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 521 | else |
16e14375 | 522 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE); |
9e6e70f8 | 523 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 524 | set_nlink(inode, fattr->nlink); |
62ab460c | 525 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
16e14375 | 526 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
9e6e70f8 TM |
527 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
528 | inode->i_uid = fattr->uid; | |
62ab460c | 529 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
16e14375 | 530 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
9e6e70f8 TM |
531 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
532 | inode->i_gid = fattr->gid; | |
62ab460c | 533 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
16e14375 | 534 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
9e6e70f8 TM |
535 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
536 | inode->i_blocks = fattr->du.nfs2.blocks; | |
537 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
538 | /* |
539 | * report the blocks in 512byte units | |
540 | */ | |
541 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 542 | } |
aa9c2669 | 543 | |
821a868a TM |
544 | if (nfsi->cache_validity != 0) |
545 | nfsi->cache_validity |= NFS_INO_REVAL_FORCED; | |
546 | ||
aa9c2669 DQ |
547 | nfs_setsecurity(inode, fattr, label); |
548 | ||
1da177e4 | 549 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 550 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 551 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 552 | |
f1fe29b4 | 553 | nfs_fscache_init_inode(inode); |
ef79c097 | 554 | |
1da177e4 | 555 | unlock_new_inode(inode); |
26fde4df N |
556 | } else { |
557 | int err = nfs_refresh_inode(inode, fattr); | |
558 | if (err < 0) { | |
559 | iput(inode); | |
560 | inode = ERR_PTR(err); | |
561 | goto out_no_inode; | |
562 | } | |
563 | } | |
1e8968c5 | 564 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 565 | inode->i_sb->s_id, |
1e8968c5 | 566 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 567 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
568 | atomic_read(&inode->i_count)); |
569 | ||
570 | out: | |
571 | return inode; | |
572 | ||
573 | out_no_inode: | |
03f28e3a | 574 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
575 | goto out; |
576 | } | |
89d77c8f | 577 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 578 | |
536e43d1 | 579 | #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 |
580 | |
581 | int | |
582 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
583 | { | |
2b0143b5 | 584 | struct inode *inode = d_inode(dentry); |
987f8dfc | 585 | struct nfs_fattr *fattr; |
ae57ca0f | 586 | int error = 0; |
1da177e4 | 587 | |
91d5b470 CL |
588 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
589 | ||
188b95dd JL |
590 | /* skip mode change if it's just for clearing setuid/setgid */ |
591 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
592 | attr->ia_valid &= ~ATTR_MODE; | |
593 | ||
1da177e4 | 594 | if (attr->ia_valid & ATTR_SIZE) { |
08a899d5 CH |
595 | BUG_ON(!S_ISREG(inode->i_mode)); |
596 | ||
ae57ca0f KM |
597 | error = inode_newsize_ok(inode, attr->ia_size); |
598 | if (error) | |
599 | return error; | |
600 | ||
601 | if (attr->ia_size == i_size_read(inode)) | |
1da177e4 LT |
602 | attr->ia_valid &= ~ATTR_SIZE; |
603 | } | |
604 | ||
605 | /* Optimization: if the end result is no change, don't RPC */ | |
606 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 607 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
608 | return 0; |
609 | ||
f4ce1299 TM |
610 | trace_nfs_setattr_enter(inode); |
611 | ||
755c1e20 | 612 | /* Write all dirty data */ |
4d346bea TM |
613 | if (S_ISREG(inode->i_mode)) |
614 | nfs_sync_inode(inode); | |
987f8dfc TM |
615 | |
616 | fattr = nfs_alloc_fattr(); | |
ae57ca0f KM |
617 | if (fattr == NULL) { |
618 | error = -ENOMEM; | |
987f8dfc | 619 | goto out; |
ae57ca0f KM |
620 | } |
621 | ||
987f8dfc | 622 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 623 | if (error == 0) |
aa9c2669 | 624 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
625 | nfs_free_fattr(fattr); |
626 | out: | |
f4ce1299 | 627 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
628 | return error; |
629 | } | |
ddda8e0a | 630 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 631 | |
a3d01454 TM |
632 | /** |
633 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
634 | * @inode: inode of the file used | |
635 | * @offset: file offset to start truncating | |
636 | * | |
637 | * This is a copy of the common vmtruncate, but with the locking | |
638 | * corrected to take into account the fact that NFS requires | |
639 | * inode->i_size to be updated under the inode->i_lock. | |
f044636d | 640 | * Note: must be called with inode->i_lock held! |
a3d01454 TM |
641 | */ |
642 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
643 | { | |
c08d3b0e | 644 | int err; |
a3d01454 | 645 | |
c08d3b0e | 646 | err = inode_newsize_ok(inode, offset); |
647 | if (err) | |
648 | goto out; | |
a3d01454 | 649 | |
c08d3b0e | 650 | i_size_write(inode, offset); |
6edf9609 TM |
651 | /* Optimisation */ |
652 | if (offset == 0) | |
653 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA; | |
f6cdfa6d | 654 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE; |
c08d3b0e | 655 | |
f044636d | 656 | spin_unlock(&inode->i_lock); |
7caef267 | 657 | truncate_pagecache(inode, offset); |
f044636d | 658 | spin_lock(&inode->i_lock); |
c08d3b0e | 659 | out: |
660 | return err; | |
a3d01454 TM |
661 | } |
662 | ||
65e4308d TM |
663 | /** |
664 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
665 | * @inode: pointer to struct inode | |
666 | * @attr: pointer to struct iattr | |
16e14375 | 667 | * @fattr: pointer to struct nfs_fattr |
65e4308d TM |
668 | * |
669 | * Note: we do this in the *proc.c in order to ensure that | |
670 | * it works for things like exclusive creates too. | |
671 | */ | |
f044636d TM |
672 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, |
673 | struct nfs_fattr *fattr) | |
65e4308d | 674 | { |
f044636d TM |
675 | /* Barrier: bump the attribute generation count. */ |
676 | nfs_fattr_set_barrier(fattr); | |
677 | ||
678 | spin_lock(&inode->i_lock); | |
679 | NFS_I(inode)->attr_gencount = fattr->gencount; | |
6a97d02d TM |
680 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
681 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); | |
682 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); | |
683 | nfs_vmtruncate(inode, attr->ia_size); | |
684 | } | |
65e4308d | 685 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
6a97d02d | 686 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME; |
1da177e4 | 687 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
688 | int mode = attr->ia_mode & S_IALLUGO; |
689 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
690 | inode->i_mode = mode; |
691 | } | |
692 | if ((attr->ia_valid & ATTR_UID) != 0) | |
693 | inode->i_uid = attr->ia_uid; | |
694 | if ((attr->ia_valid & ATTR_GID) != 0) | |
695 | inode->i_gid = attr->ia_gid; | |
6a97d02d | 696 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
15eefe2a | 697 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); |
6a97d02d TM |
698 | else |
699 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
700 | | NFS_INO_INVALID_CTIME); | |
6edf9609 TM |
701 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
702 | | NFS_INO_INVALID_ACL); | |
65e4308d | 703 | } |
6a97d02d TM |
704 | if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) { |
705 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME | |
706 | | NFS_INO_INVALID_CTIME); | |
707 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) | |
15eefe2a | 708 | inode->i_atime = timespec_to_timespec64(fattr->atime); |
6a97d02d TM |
709 | else if (attr->ia_valid & ATTR_ATIME_SET) |
710 | inode->i_atime = attr->ia_atime; | |
711 | else | |
712 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); | |
713 | ||
714 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
15eefe2a | 715 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); |
6a97d02d TM |
716 | else |
717 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
718 | | NFS_INO_INVALID_CTIME); | |
719 | } | |
720 | if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) { | |
721 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME | |
722 | | NFS_INO_INVALID_CTIME); | |
723 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
15eefe2a | 724 | inode->i_mtime = timespec_to_timespec64(fattr->mtime); |
6a97d02d TM |
725 | else if (attr->ia_valid & ATTR_MTIME_SET) |
726 | inode->i_mtime = attr->ia_mtime; | |
727 | else | |
728 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); | |
729 | ||
730 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
15eefe2a | 731 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); |
6a97d02d TM |
732 | else |
733 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
734 | | NFS_INO_INVALID_CTIME); | |
65e4308d | 735 | } |
616c3196 JL |
736 | if (fattr->valid) |
737 | nfs_update_inode(inode, fattr); | |
f044636d | 738 | spin_unlock(&inode->i_lock); |
1da177e4 | 739 | } |
ddda8e0a | 740 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 741 | |
1bcf4c5c | 742 | static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry) |
311324ad TM |
743 | { |
744 | struct dentry *parent; | |
745 | ||
1bcf4c5c TM |
746 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) |
747 | return; | |
311324ad | 748 | parent = dget_parent(dentry); |
2b0143b5 | 749 | nfs_force_use_readdirplus(d_inode(parent)); |
311324ad TM |
750 | dput(parent); |
751 | } | |
752 | ||
1bcf4c5c TM |
753 | static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry) |
754 | { | |
755 | struct dentry *parent; | |
756 | ||
757 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) | |
758 | return; | |
759 | parent = dget_parent(dentry); | |
760 | nfs_advise_use_readdirplus(d_inode(parent)); | |
761 | dput(parent); | |
762 | } | |
763 | ||
311324ad TM |
764 | static bool nfs_need_revalidate_inode(struct inode *inode) |
765 | { | |
766 | if (NFS_I(inode)->cache_validity & | |
767 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
768 | return true; | |
769 | if (nfs_attribute_cache_expired(inode)) | |
770 | return true; | |
771 | return false; | |
772 | } | |
773 | ||
a528d35e DH |
774 | int nfs_getattr(const struct path *path, struct kstat *stat, |
775 | u32 request_mask, unsigned int query_flags) | |
1da177e4 | 776 | { |
a528d35e | 777 | struct inode *inode = d_inode(path->dentry); |
9ccee940 TM |
778 | struct nfs_server *server = NFS_SERVER(inode); |
779 | unsigned long cache_validity; | |
16caf5b6 | 780 | int err = 0; |
9ccee940 TM |
781 | bool force_sync = query_flags & AT_STATX_FORCE_SYNC; |
782 | bool do_update = false; | |
1da177e4 | 783 | |
f4ce1299 | 784 | trace_nfs_getattr_enter(inode); |
9ccee940 TM |
785 | |
786 | if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) | |
787 | goto out_no_update; | |
788 | ||
acdc53b2 | 789 | /* Flush out writes to the server in order to update c/mtime. */ |
9ccee940 TM |
790 | if ((request_mask & (STATX_CTIME|STATX_MTIME)) && |
791 | S_ISREG(inode->i_mode)) { | |
79566ef0 | 792 | err = filemap_write_and_wait(inode->i_mapping); |
acdc53b2 TM |
793 | if (err) |
794 | goto out; | |
28c494c5 | 795 | } |
fc33a7bb CH |
796 | |
797 | /* | |
798 | * We may force a getattr if the user cares about atime. | |
799 | * | |
800 | * Note that we only have to check the vfsmount flags here: | |
801 | * - NFS always sets S_NOATIME by so checking it would give a | |
802 | * bogus result | |
1751e8a6 | 803 | * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is |
fc33a7bb CH |
804 | * no point in checking those. |
805 | */ | |
a528d35e DH |
806 | if ((path->mnt->mnt_flags & MNT_NOATIME) || |
807 | ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
9ccee940 TM |
808 | request_mask &= ~STATX_ATIME; |
809 | ||
810 | /* Is the user requesting attributes that might need revalidation? */ | |
811 | if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME| | |
812 | STATX_MTIME|STATX_UID|STATX_GID| | |
813 | STATX_SIZE|STATX_BLOCKS))) | |
814 | goto out_no_revalidate; | |
815 | ||
816 | /* Check whether the cached attributes are stale */ | |
817 | do_update |= force_sync || nfs_attribute_cache_expired(inode); | |
818 | cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
819 | do_update |= cache_validity & | |
820 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL); | |
821 | if (request_mask & STATX_ATIME) | |
822 | do_update |= cache_validity & NFS_INO_INVALID_ATIME; | |
823 | if (request_mask & (STATX_CTIME|STATX_MTIME)) | |
824 | do_update |= cache_validity & NFS_INO_REVAL_PAGECACHE; | |
825 | if (do_update) { | |
826 | /* Update the attribute cache */ | |
59b86d85 HT |
827 | if (!(server->flags & NFS_MOUNT_NOAC)) |
828 | nfs_readdirplus_parent_cache_miss(path->dentry); | |
829 | else | |
830 | nfs_readdirplus_parent_cache_hit(path->dentry); | |
311324ad | 831 | err = __nfs_revalidate_inode(server, inode); |
9ccee940 TM |
832 | if (err) |
833 | goto out; | |
1bcf4c5c | 834 | } else |
a528d35e | 835 | nfs_readdirplus_parent_cache_hit(path->dentry); |
9ccee940 TM |
836 | out_no_revalidate: |
837 | /* Only return attributes that were revalidated. */ | |
838 | stat->result_mask &= request_mask; | |
839 | out_no_update: | |
840 | generic_fillattr(inode, stat); | |
841 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); | |
842 | if (S_ISDIR(inode->i_mode)) | |
843 | stat->blksize = NFS_SERVER(inode)->dtsize; | |
acdc53b2 | 844 | out: |
f4ce1299 | 845 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
846 | return err; |
847 | } | |
ddda8e0a | 848 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 849 | |
f11ac8db TM |
850 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
851 | { | |
2f62b5aa | 852 | refcount_set(&l_ctx->count, 1); |
d51fdb87 | 853 | l_ctx->lockowner = current->files; |
f11ac8db | 854 | INIT_LIST_HEAD(&l_ctx->list); |
210c7c17 | 855 | atomic_set(&l_ctx->io_count, 0); |
f11ac8db TM |
856 | } |
857 | ||
858 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
859 | { | |
1db97eaa | 860 | struct nfs_lock_context *pos; |
f11ac8db | 861 | |
1db97eaa | 862 | list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) { |
d51fdb87 | 863 | if (pos->lockowner != current->files) |
f11ac8db | 864 | continue; |
1db97eaa TM |
865 | if (refcount_inc_not_zero(&pos->count)) |
866 | return pos; | |
867 | } | |
f11ac8db TM |
868 | return NULL; |
869 | } | |
870 | ||
871 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
872 | { | |
873 | struct nfs_lock_context *res, *new = NULL; | |
2b0143b5 | 874 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db | 875 | |
1db97eaa | 876 | rcu_read_lock(); |
f11ac8db | 877 | res = __nfs_find_lock_context(ctx); |
1db97eaa | 878 | rcu_read_unlock(); |
f11ac8db | 879 | if (res == NULL) { |
f11ac8db TM |
880 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
881 | if (new == NULL) | |
b3c54de6 | 882 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
883 | nfs_init_lock_context(new); |
884 | spin_lock(&inode->i_lock); | |
885 | res = __nfs_find_lock_context(ctx); | |
886 | if (res == NULL) { | |
1db97eaa | 887 | list_add_tail_rcu(&new->list, &ctx->lock_context.list); |
f11ac8db TM |
888 | new->open_context = ctx; |
889 | res = new; | |
890 | new = NULL; | |
891 | } | |
1db97eaa TM |
892 | spin_unlock(&inode->i_lock); |
893 | kfree(new); | |
f11ac8db | 894 | } |
f11ac8db TM |
895 | return res; |
896 | } | |
1c6dcbe5 | 897 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
898 | |
899 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
900 | { | |
901 | struct nfs_open_context *ctx = l_ctx->open_context; | |
2b0143b5 | 902 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db | 903 | |
2f62b5aa | 904 | if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock)) |
f11ac8db | 905 | return; |
1db97eaa | 906 | list_del_rcu(&l_ctx->list); |
f11ac8db | 907 | spin_unlock(&inode->i_lock); |
1db97eaa | 908 | kfree_rcu(l_ctx, rcu_head); |
f11ac8db | 909 | } |
1c6dcbe5 | 910 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 911 | |
7fe5c398 TM |
912 | /** |
913 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
914 | * @ctx: pointer to context | |
915 | * @is_sync: is this a synchronous close | |
916 | * | |
5cf9d706 TM |
917 | * Ensure that the attributes are up to date if we're mounted |
918 | * with close-to-open semantics and we have cached data that will | |
919 | * need to be revalidated on open. | |
7fe5c398 TM |
920 | */ |
921 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
922 | { | |
5cf9d706 | 923 | struct nfs_inode *nfsi; |
7fe5c398 TM |
924 | struct inode *inode; |
925 | struct nfs_server *server; | |
926 | ||
927 | if (!(ctx->mode & FMODE_WRITE)) | |
928 | return; | |
929 | if (!is_sync) | |
930 | return; | |
2b0143b5 | 931 | inode = d_inode(ctx->dentry); |
58ff4184 TM |
932 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
933 | return; | |
5cf9d706 TM |
934 | nfsi = NFS_I(inode); |
935 | if (inode->i_mapping->nrpages == 0) | |
936 | return; | |
937 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
938 | return; | |
939 | if (!list_empty(&nfsi->open_files)) | |
7fe5c398 TM |
940 | return; |
941 | server = NFS_SERVER(inode); | |
942 | if (server->flags & NFS_MOUNT_NOCTO) | |
943 | return; | |
944 | nfs_revalidate_inode(server, inode); | |
945 | } | |
ddda8e0a | 946 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 947 | |
532d4def N |
948 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, |
949 | fmode_t f_mode, | |
950 | struct file *filp) | |
1da177e4 LT |
951 | { |
952 | struct nfs_open_context *ctx; | |
a52458b4 | 953 | const struct cred *cred = get_current_cred(); |
1da177e4 | 954 | |
f52720ca | 955 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c | 956 | if (!ctx) { |
a52458b4 | 957 | put_cred(cred); |
5ede7b1c | 958 | return ERR_PTR(-ENOMEM); |
1da177e4 | 959 | } |
5ede7b1c AV |
960 | nfs_sb_active(dentry->d_sb); |
961 | ctx->dentry = dget(dentry); | |
962 | ctx->cred = cred; | |
ddf529ee | 963 | ctx->ll_cred = NULL; |
5ede7b1c AV |
964 | ctx->state = NULL; |
965 | ctx->mode = f_mode; | |
966 | ctx->flags = 0; | |
967 | ctx->error = 0; | |
532d4def | 968 | ctx->flock_owner = (fl_owner_t)filp; |
5ede7b1c AV |
969 | nfs_init_lock_context(&ctx->lock_context); |
970 | ctx->lock_context.open_context = ctx; | |
971 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 972 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
973 | return ctx; |
974 | } | |
89d77c8f | 975 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
976 | |
977 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
978 | { | |
0de43976 TM |
979 | if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count)) |
980 | return ctx; | |
981 | return NULL; | |
1da177e4 | 982 | } |
89d77c8f | 983 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 984 | |
7fe5c398 | 985 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 986 | { |
2b0143b5 | 987 | struct inode *inode = d_inode(ctx->dentry); |
3d4ff43d | 988 | struct super_block *sb = ctx->dentry->d_sb; |
3bec63db | 989 | |
0de43976 TM |
990 | if (!refcount_dec_and_test(&ctx->lock_context.count)) |
991 | return; | |
5c78f58e | 992 | if (!list_empty(&ctx->list)) { |
0de43976 TM |
993 | spin_lock(&inode->i_lock); |
994 | list_del_rcu(&ctx->list); | |
ef84303e | 995 | spin_unlock(&inode->i_lock); |
0de43976 | 996 | } |
5c78f58e TM |
997 | if (inode != NULL) |
998 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
a52458b4 | 999 | put_cred(ctx->cred); |
3d4ff43d | 1000 | dput(ctx->dentry); |
322b2b90 | 1001 | nfs_sb_deactive(sb); |
ddf529ee | 1002 | put_rpccred(ctx->ll_cred); |
82be417a | 1003 | kfree(ctx->mdsthreshold); |
0de43976 | 1004 | kfree_rcu(ctx, rcu_head); |
3bec63db TM |
1005 | } |
1006 | ||
a49c3c77 TM |
1007 | void put_nfs_open_context(struct nfs_open_context *ctx) |
1008 | { | |
1009 | __put_nfs_open_context(ctx, 0); | |
1010 | } | |
89d77c8f | 1011 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 1012 | |
4eae5014 TM |
1013 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
1014 | { | |
1015 | __put_nfs_open_context(ctx, 1); | |
1016 | } | |
1017 | ||
1da177e4 LT |
1018 | /* |
1019 | * Ensure that mmap has a recent RPC credential for use when writing out | |
1020 | * shared pages | |
1021 | */ | |
c45ffdd2 | 1022 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 1023 | { |
2b0143b5 | 1024 | struct inode *inode = d_inode(ctx->dentry); |
1da177e4 LT |
1025 | struct nfs_inode *nfsi = NFS_I(inode); |
1026 | ||
1da177e4 | 1027 | spin_lock(&inode->i_lock); |
0de43976 | 1028 | list_add_tail_rcu(&ctx->list, &nfsi->open_files); |
1da177e4 LT |
1029 | spin_unlock(&inode->i_lock); |
1030 | } | |
c45ffdd2 TM |
1031 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
1032 | ||
1033 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
1034 | { | |
1035 | filp->private_data = get_nfs_open_context(ctx); | |
1036 | if (list_empty(&ctx->list)) | |
1037 | nfs_inode_attach_open_context(ctx); | |
1038 | } | |
89d77c8f | 1039 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 1040 | |
d530838b TM |
1041 | /* |
1042 | * Given an inode, search for an open context with the desired characteristics | |
1043 | */ | |
a52458b4 | 1044 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode) |
1da177e4 LT |
1045 | { |
1046 | struct nfs_inode *nfsi = NFS_I(inode); | |
1047 | struct nfs_open_context *pos, *ctx = NULL; | |
1048 | ||
0de43976 TM |
1049 | rcu_read_lock(); |
1050 | list_for_each_entry_rcu(pos, &nfsi->open_files, list) { | |
d530838b TM |
1051 | if (cred != NULL && pos->cred != cred) |
1052 | continue; | |
1544fa0f TM |
1053 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
1054 | continue; | |
1055 | ctx = get_nfs_open_context(pos); | |
0de43976 TM |
1056 | if (ctx) |
1057 | break; | |
1da177e4 | 1058 | } |
0de43976 | 1059 | rcu_read_unlock(); |
1da177e4 LT |
1060 | return ctx; |
1061 | } | |
1062 | ||
aff8d8dc | 1063 | void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 1064 | { |
cd3758e3 | 1065 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
1066 | |
1067 | if (ctx) { | |
2b0143b5 | 1068 | struct inode *inode = d_inode(ctx->dentry); |
c45ffdd2 | 1069 | |
0bcbf039 PT |
1070 | /* |
1071 | * We fatal error on write before. Try to writeback | |
1072 | * every page again. | |
1073 | */ | |
1074 | if (ctx->error < 0) | |
1075 | invalidate_inode_pages2(inode->i_mapping); | |
1da177e4 | 1076 | filp->private_data = NULL; |
4eae5014 | 1077 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
1078 | } |
1079 | } | |
1080 | ||
1081 | /* | |
1082 | * These allocate and release file read/write context information. | |
1083 | */ | |
1084 | int nfs_open(struct inode *inode, struct file *filp) | |
1085 | { | |
1086 | struct nfs_open_context *ctx; | |
1da177e4 | 1087 | |
532d4def | 1088 | ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp); |
5ede7b1c AV |
1089 | if (IS_ERR(ctx)) |
1090 | return PTR_ERR(ctx); | |
1da177e4 LT |
1091 | nfs_file_set_open_context(filp, ctx); |
1092 | put_nfs_open_context(ctx); | |
f1fe29b4 | 1093 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
1094 | return 0; |
1095 | } | |
1096 | ||
1da177e4 LT |
1097 | /* |
1098 | * This function is called whenever some part of NFS notices that | |
1099 | * the cached attributes have to be refreshed. | |
1100 | */ | |
1101 | int | |
1102 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1103 | { | |
1104 | int status = -ESTALE; | |
1775fd3e | 1105 | struct nfs4_label *label = NULL; |
a3cba2aa | 1106 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 1107 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1108 | |
1e8968c5 NV |
1109 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
1110 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 1111 | |
f4ce1299 TM |
1112 | trace_nfs_revalidate_inode_enter(inode); |
1113 | ||
85233a7a | 1114 | if (is_bad_inode(inode)) |
691beb13 | 1115 | goto out; |
1da177e4 | 1116 | if (NFS_STALE(inode)) |
412d582e | 1117 | goto out; |
7fdc49c4 | 1118 | |
ac46bd37 TM |
1119 | /* pNFS: Attributes aren't updated until we layoutcommit */ |
1120 | if (S_ISREG(inode->i_mode)) { | |
1121 | status = pnfs_sync_inode(inode, false); | |
1122 | if (status) | |
1123 | goto out; | |
1124 | } | |
1125 | ||
a3cba2aa TM |
1126 | status = -ENOMEM; |
1127 | fattr = nfs_alloc_fattr(); | |
1128 | if (fattr == NULL) | |
1129 | goto out; | |
1130 | ||
691beb13 | 1131 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
1132 | |
1133 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
1134 | if (IS_ERR(label)) { | |
1135 | status = PTR_ERR(label); | |
1136 | goto out; | |
1137 | } | |
1138 | ||
a841b54d TM |
1139 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, |
1140 | label, inode); | |
1da177e4 | 1141 | if (status != 0) { |
1e8968c5 | 1142 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 1143 | inode->i_sb->s_id, |
1e8968c5 | 1144 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
1145 | if (status == -ESTALE) { |
1146 | nfs_zap_caches(inode); | |
1147 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 1148 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 1149 | } |
14c43f76 | 1150 | goto err_out; |
1da177e4 LT |
1151 | } |
1152 | ||
a3cba2aa | 1153 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 1154 | if (status) { |
1e8968c5 | 1155 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 1156 | inode->i_sb->s_id, |
1e8968c5 | 1157 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 1158 | goto err_out; |
1da177e4 | 1159 | } |
55296809 | 1160 | |
24aa1fe6 | 1161 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1162 | nfs_zap_acl_cache(inode); |
55296809 | 1163 | |
3da580aa JL |
1164 | nfs_setsecurity(inode, fattr, label); |
1165 | ||
1e8968c5 | 1166 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 1167 | inode->i_sb->s_id, |
1e8968c5 | 1168 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 1169 | |
14c43f76 DQ |
1170 | err_out: |
1171 | nfs4_label_free(label); | |
1172 | out: | |
a3cba2aa | 1173 | nfs_free_fattr(fattr); |
f4ce1299 | 1174 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
1175 | return status; |
1176 | } | |
1177 | ||
43f291cd | 1178 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 1179 | { |
b4d2314b | 1180 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 1181 | return 0; |
d7cf8dd0 | 1182 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
1183 | } |
1184 | ||
1185 | /** | |
1186 | * nfs_revalidate_inode - Revalidate the inode attributes | |
1187 | * @server - pointer to nfs_server struct | |
1188 | * @inode - pointer to inode struct | |
1189 | * | |
1190 | * Updates inode attribute information by retrieving the data from the server. | |
1191 | */ | |
1192 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1193 | { | |
311324ad | 1194 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1195 | return NFS_STALE(inode) ? -ESTALE : 0; |
1196 | return __nfs_revalidate_inode(server, inode); | |
1197 | } | |
1c606fb7 | 1198 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1199 | |
1cda707d | 1200 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1201 | { |
1202 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1203 | int ret; |
1204 | ||
717d44e8 | 1205 | if (mapping->nrpages != 0) { |
f8806c84 TM |
1206 | if (S_ISREG(inode->i_mode)) { |
1207 | ret = nfs_sync_mapping(mapping); | |
1208 | if (ret < 0) | |
1209 | return ret; | |
1210 | } | |
1211 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1212 | if (ret < 0) |
1213 | return ret; | |
1214 | } | |
d529ef83 JL |
1215 | if (S_ISDIR(inode->i_mode)) { |
1216 | spin_lock(&inode->i_lock); | |
717d44e8 | 1217 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1218 | spin_unlock(&inode->i_lock); |
1219 | } | |
717d44e8 | 1220 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1221 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1222 | |
1e8968c5 NV |
1223 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1224 | inode->i_sb->s_id, | |
1225 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1226 | return 0; |
1227 | } | |
1228 | ||
1cd9cb05 | 1229 | bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
b4b1eadf | 1230 | { |
61540bf6 TM |
1231 | return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) || |
1232 | NFS_STALE(inode); | |
b4b1eadf TM |
1233 | } |
1234 | ||
0d0def49 AV |
1235 | int nfs_revalidate_mapping_rcu(struct inode *inode) |
1236 | { | |
1237 | struct nfs_inode *nfsi = NFS_I(inode); | |
1238 | unsigned long *bitlock = &nfsi->flags; | |
1239 | int ret = 0; | |
1240 | ||
1241 | if (IS_SWAPFILE(inode)) | |
1242 | goto out; | |
1243 | if (nfs_mapping_need_revalidate_inode(inode)) { | |
1244 | ret = -ECHILD; | |
1245 | goto out; | |
1246 | } | |
1247 | spin_lock(&inode->i_lock); | |
1248 | if (test_bit(NFS_INO_INVALIDATING, bitlock) || | |
1249 | (nfsi->cache_validity & NFS_INO_INVALID_DATA)) | |
1250 | ret = -ECHILD; | |
1251 | spin_unlock(&inode->i_lock); | |
1252 | out: | |
1253 | return ret; | |
1254 | } | |
1255 | ||
717d44e8 | 1256 | /** |
be527494 | 1257 | * nfs_revalidate_mapping - Revalidate the pagecache |
717d44e8 TM |
1258 | * @inode - pointer to host inode |
1259 | * @mapping - pointer to mapping | |
717d44e8 | 1260 | */ |
be527494 TM |
1261 | int nfs_revalidate_mapping(struct inode *inode, |
1262 | struct address_space *mapping) | |
717d44e8 TM |
1263 | { |
1264 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1265 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1266 | int ret = 0; |
dc59250c | 1267 | |
29418aa4 MG |
1268 | /* swapfiles are not supposed to be shared. */ |
1269 | if (IS_SWAPFILE(inode)) | |
1270 | goto out; | |
1271 | ||
b4b1eadf | 1272 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1273 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1274 | if (ret < 0) | |
1275 | goto out; | |
7d52e862 | 1276 | } |
d529ef83 JL |
1277 | |
1278 | /* | |
1279 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1280 | * invalidations that come in while we're shooting down the mappings | |
1281 | * are respected. But, that leaves a race window where one revalidator | |
1282 | * can clear the flag, and then another checks it before the mapping | |
1283 | * gets invalidated. Fix that by serializing access to this part of | |
1284 | * the function. | |
1285 | * | |
1286 | * At the same time, we need to allow other tasks to see whether we | |
1287 | * might be in the middle of invalidating the pages, so we only set | |
1288 | * the bit lock here if it looks like we're going to be doing that. | |
1289 | */ | |
1290 | for (;;) { | |
74316201 N |
1291 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1292 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1293 | if (ret) |
1294 | goto out; | |
17dfeb91 TM |
1295 | spin_lock(&inode->i_lock); |
1296 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1297 | spin_unlock(&inode->i_lock); | |
1298 | continue; | |
1299 | } | |
1300 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1301 | break; |
d529ef83 | 1302 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1303 | goto out; |
f4ce1299 TM |
1304 | } |
1305 | ||
17dfeb91 | 1306 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1307 | smp_wmb(); |
17dfeb91 TM |
1308 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1309 | spin_unlock(&inode->i_lock); | |
1310 | trace_nfs_invalidate_mapping_enter(inode); | |
be527494 | 1311 | ret = nfs_invalidate_mapping(inode, mapping); |
17dfeb91 TM |
1312 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1313 | ||
d529ef83 | 1314 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1315 | smp_mb__after_atomic(); |
d529ef83 | 1316 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1317 | out: |
44b11874 | 1318 | return ret; |
7d52e862 TM |
1319 | } |
1320 | ||
ca0daa27 | 1321 | static bool nfs_file_has_writers(struct nfs_inode *nfsi) |
874f9463 | 1322 | { |
ca0daa27 TM |
1323 | struct inode *inode = &nfsi->vfs_inode; |
1324 | ||
ca0daa27 TM |
1325 | if (!S_ISREG(inode->i_mode)) |
1326 | return false; | |
1327 | if (list_empty(&nfsi->open_files)) | |
1328 | return false; | |
6ba0c4e5 | 1329 | return inode_is_open_for_write(inode); |
874f9463 TM |
1330 | } |
1331 | ||
651b0e70 | 1332 | static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi) |
874f9463 | 1333 | { |
651b0e70 | 1334 | return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi); |
874f9463 TM |
1335 | } |
1336 | ||
783b194c | 1337 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 | 1338 | { |
95582b00 DD |
1339 | struct timespec ts; |
1340 | ||
9e6e70f8 TM |
1341 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1342 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
c472c07b | 1343 | && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) { |
1eb5d98f | 1344 | inode_set_iversion_raw(inode, fattr->change_attr); |
70ca8852 | 1345 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1346 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
70ca8852 | 1347 | } |
a895b4a1 | 1348 | /* If we have atomic WCC data, we may update some attributes */ |
95582b00 | 1349 | ts = timespec64_to_timespec(inode->i_ctime); |
9e6e70f8 TM |
1350 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1351 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
95582b00 DD |
1352 | && timespec_equal(&ts, &fattr->pre_ctime)) { |
1353 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); | |
27dc1cd3 | 1354 | } |
9e6e70f8 | 1355 | |
95582b00 | 1356 | ts = timespec64_to_timespec(inode->i_mtime); |
9e6e70f8 TM |
1357 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) |
1358 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
95582b00 DD |
1359 | && timespec_equal(&ts, &fattr->pre_mtime)) { |
1360 | inode->i_mtime = timespec_to_timespec64(fattr->mtime); | |
27dc1cd3 | 1361 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1362 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
a895b4a1 | 1363 | } |
9e6e70f8 TM |
1364 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1365 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1366 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
a6b6d5b8 | 1367 | && !nfs_have_writebacks(inode)) { |
27dc1cd3 | 1368 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
27dc1cd3 | 1369 | } |
a895b4a1 TM |
1370 | } |
1371 | ||
1da177e4 | 1372 | /** |
33801147 | 1373 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1374 | * @inode - pointer to inode |
1375 | * @fattr - updated attributes | |
1376 | * | |
1377 | * Verifies the attribute cache. If we have just changed the attributes, | |
1378 | * so that fattr carries weak cache consistency data, then it may | |
1379 | * also update the ctime/mtime/change_attribute. | |
1380 | */ | |
33801147 | 1381 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1382 | { |
1383 | struct nfs_inode *nfsi = NFS_I(inode); | |
1384 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1385 | unsigned long invalid = 0; |
95582b00 | 1386 | struct timespec ts; |
dc59250c | 1387 | |
4ebe83af | 1388 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
01da47bd | 1389 | return 0; |
4ebe83af | 1390 | |
ca62b9c3 | 1391 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 | 1392 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
cc89684c | 1393 | return -ESTALE; |
9e6e70f8 | 1394 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
cc89684c | 1395 | return -ESTALE; |
ca62b9c3 | 1396 | |
651b0e70 | 1397 | if (!nfs_file_has_buffered_writers(nfsi)) { |
ca0daa27 | 1398 | /* Verify a few of the more important attributes */ |
c472c07b | 1399 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr)) |
16e14375 TM |
1400 | invalid |= NFS_INO_INVALID_CHANGE |
1401 | | NFS_INO_REVAL_PAGECACHE; | |
1da177e4 | 1402 | |
95582b00 DD |
1403 | ts = timespec64_to_timespec(inode->i_mtime); |
1404 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&ts, &fattr->mtime)) | |
16e14375 | 1405 | invalid |= NFS_INO_INVALID_MTIME; |
ca62b9c3 | 1406 | |
95582b00 DD |
1407 | ts = timespec64_to_timespec(inode->i_ctime); |
1408 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&ts, &fattr->ctime)) | |
16e14375 | 1409 | invalid |= NFS_INO_INVALID_CTIME; |
ca0daa27 TM |
1410 | |
1411 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { | |
1412 | cur_size = i_size_read(inode); | |
1413 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1414 | if (cur_size != new_isize) | |
16e14375 TM |
1415 | invalid |= NFS_INO_INVALID_SIZE |
1416 | | NFS_INO_REVAL_PAGECACHE; | |
ca0daa27 | 1417 | } |
9e6e70f8 | 1418 | } |
1da177e4 LT |
1419 | |
1420 | /* Have any file permissions changed? */ | |
9e6e70f8 | 1421 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
16e14375 TM |
1422 | invalid |= NFS_INO_INVALID_ACCESS |
1423 | | NFS_INO_INVALID_ACL | |
1424 | | NFS_INO_INVALID_OTHER; | |
9ff593c4 | 1425 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
16e14375 TM |
1426 | invalid |= NFS_INO_INVALID_ACCESS |
1427 | | NFS_INO_INVALID_ACL | |
1428 | | NFS_INO_INVALID_OTHER; | |
9ff593c4 | 1429 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
16e14375 TM |
1430 | invalid |= NFS_INO_INVALID_ACCESS |
1431 | | NFS_INO_INVALID_ACL | |
1432 | | NFS_INO_INVALID_OTHER; | |
1da177e4 LT |
1433 | |
1434 | /* Has the link count changed? */ | |
9e6e70f8 | 1435 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
16e14375 | 1436 | invalid |= NFS_INO_INVALID_OTHER; |
1da177e4 | 1437 | |
95582b00 DD |
1438 | ts = timespec64_to_timespec(inode->i_atime); |
1439 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&ts, &fattr->atime)) | |
2a3f5fd4 TM |
1440 | invalid |= NFS_INO_INVALID_ATIME; |
1441 | ||
1442 | if (invalid != 0) | |
4ebe83af | 1443 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1444 | |
33801147 | 1445 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1446 | return 0; |
1447 | } | |
1448 | ||
ae05f269 | 1449 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1450 | |
1451 | static unsigned long nfs_read_attr_generation_counter(void) | |
1452 | { | |
ae05f269 | 1453 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1454 | } |
1455 | ||
1456 | unsigned long nfs_inc_attr_generation_counter(void) | |
1457 | { | |
ae05f269 | 1458 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 | 1459 | } |
3235b403 | 1460 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
4704f0e2 TM |
1461 | |
1462 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1463 | { | |
1464 | fattr->valid = 0; | |
1465 | fattr->time_start = jiffies; | |
1466 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1467 | fattr->owner_name = NULL; |
1468 | fattr->group_name = NULL; | |
4704f0e2 | 1469 | } |
ddda8e0a | 1470 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1471 | |
140e049c TM |
1472 | /** |
1473 | * nfs_fattr_set_barrier | |
1474 | * @fattr: attributes | |
1475 | * | |
1476 | * Used to set a barrier after an attribute was updated. This | |
1477 | * barrier ensures that older attributes from RPC calls that may | |
1478 | * have raced with our update cannot clobber these new values. | |
1479 | * Note that you are still responsible for ensuring that other | |
1480 | * operations which change the attribute on the server do not | |
1481 | * collide. | |
1482 | */ | |
1483 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) | |
1484 | { | |
1485 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1486 | } | |
1487 | ||
2d36bfde TM |
1488 | struct nfs_fattr *nfs_alloc_fattr(void) |
1489 | { | |
1490 | struct nfs_fattr *fattr; | |
1491 | ||
1492 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1493 | if (fattr != NULL) | |
1494 | nfs_fattr_init(fattr); | |
1495 | return fattr; | |
1496 | } | |
ddda8e0a | 1497 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1498 | |
1499 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1500 | { | |
1501 | struct nfs_fh *fh; | |
1502 | ||
1503 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1504 | if (fh != NULL) | |
1505 | fh->size = 0; | |
1506 | return fh; | |
1507 | } | |
ddda8e0a | 1508 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1509 | |
e27d359e | 1510 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1511 | /* |
1512 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1513 | * in the same way that wireshark does | |
1514 | * | |
1515 | * @fh: file handle | |
1516 | * | |
1517 | * For debugging only. | |
1518 | */ | |
1519 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1520 | { | |
1521 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1522 | * not on the result */ | |
1264a2f0 | 1523 | return nfs_fhandle_hash(fh); |
d8e0539e | 1524 | } |
9e6ee76d | 1525 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1526 | |
1527 | /* | |
20d27e92 CL |
1528 | * _nfs_display_fhandle - display an NFS file handle on the console |
1529 | * | |
1530 | * @fh: file handle to display | |
1531 | * @caption: display caption | |
1532 | * | |
1533 | * For debugging only. | |
1534 | */ | |
20d27e92 CL |
1535 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1536 | { | |
1537 | unsigned short i; | |
1538 | ||
fa68a1ba | 1539 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1540 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1541 | return; | |
1542 | } | |
1543 | ||
d8e0539e WAA |
1544 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1545 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1546 | for (i = 0; i < fh->size; i += 16) { |
1547 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1548 | ||
1549 | switch ((fh->size - i - 1) >> 2) { | |
1550 | case 0: | |
1551 | printk(KERN_DEFAULT " %08x\n", | |
1552 | be32_to_cpup(pos)); | |
1553 | break; | |
1554 | case 1: | |
1555 | printk(KERN_DEFAULT " %08x %08x\n", | |
1556 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1557 | break; | |
1558 | case 2: | |
1559 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1560 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1561 | be32_to_cpup(pos + 2)); | |
1562 | break; | |
1563 | default: | |
1564 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1565 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1566 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1567 | } | |
1568 | } | |
1569 | } | |
9e6ee76d | 1570 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1571 | #endif |
1572 | ||
a10ad176 TM |
1573 | /** |
1574 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1575 | * @inode - pointer to inode | |
1576 | * @fattr - attributes | |
1577 | * | |
1578 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1579 | * attributes got scheduled after another call carrying updated ones. | |
1580 | * | |
1581 | * To do so, the function first assumes that a more recent ctime means | |
1582 | * that the attributes in fattr are newer, however it also attempt to | |
1583 | * catch the case where ctime either didn't change, or went backwards | |
1584 | * (if someone reset the clock on the server) by looking at whether | |
1585 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1586 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1587 | * |
1588 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1589 | * more recent than the ones cached in the inode. | |
1590 | * | |
1591 | */ | |
1592 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1593 | { | |
1594 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1595 | ||
4704f0e2 | 1596 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
4704f0e2 | 1597 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1598 | } |
1599 | ||
1600 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1601 | { | |
f4ce1299 TM |
1602 | int ret; |
1603 | ||
1604 | trace_nfs_refresh_inode_enter(inode); | |
1605 | ||
a10ad176 | 1606 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1607 | ret = nfs_update_inode(inode, fattr); |
1608 | else | |
1609 | ret = nfs_check_inode_attributes(inode, fattr); | |
1610 | ||
1611 | trace_nfs_refresh_inode_exit(inode, ret); | |
1612 | return ret; | |
870a5be8 TM |
1613 | } |
1614 | ||
33801147 TM |
1615 | /** |
1616 | * nfs_refresh_inode - try to update the inode attribute cache | |
1617 | * @inode - pointer to inode | |
1618 | * @fattr - updated attributes | |
1619 | * | |
1620 | * Check that an RPC call that returned attributes has not overlapped with | |
1621 | * other recent updates of the inode metadata, then decide whether it is | |
1622 | * safe to do a full update of the inode attributes, or whether just to | |
1623 | * call nfs_check_inode_attributes. | |
1624 | */ | |
1625 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1626 | { | |
33801147 TM |
1627 | int status; |
1628 | ||
1629 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1630 | return 0; | |
1631 | spin_lock(&inode->i_lock); | |
870a5be8 | 1632 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1633 | spin_unlock(&inode->i_lock); |
ef79c097 | 1634 | |
33801147 TM |
1635 | return status; |
1636 | } | |
ddda8e0a | 1637 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1638 | |
16e14375 TM |
1639 | static int nfs_post_op_update_inode_locked(struct inode *inode, |
1640 | struct nfs_fattr *fattr, unsigned int invalid) | |
d65f557f | 1641 | { |
6edf9609 TM |
1642 | if (S_ISDIR(inode->i_mode)) |
1643 | invalid |= NFS_INO_INVALID_DATA; | |
1644 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1645 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1646 | return 0; | |
1647 | return nfs_refresh_inode_locked(inode, fattr); | |
1648 | } | |
1649 | ||
decf491f TM |
1650 | /** |
1651 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1652 | * @inode - pointer to inode | |
1653 | * @fattr - updated attributes | |
1654 | * | |
1655 | * After an operation that has changed the inode metadata, mark the | |
1656 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1657 | * |
1658 | * NB: if the server didn't return any post op attributes, this | |
1659 | * function will force the retrieval of attributes before the next | |
1660 | * NFS request. Thus it should be used only for operations that | |
1661 | * are expected to change one or more attributes, to avoid | |
1662 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1663 | */ |
1664 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1665 | { | |
d65f557f | 1666 | int status; |
decf491f | 1667 | |
7668fdbe | 1668 | spin_lock(&inode->i_lock); |
92d64e47 | 1669 | nfs_fattr_set_barrier(fattr); |
16e14375 TM |
1670 | status = nfs_post_op_update_inode_locked(inode, fattr, |
1671 | NFS_INO_INVALID_CHANGE | |
d554168f TM |
1672 | | NFS_INO_INVALID_CTIME |
1673 | | NFS_INO_REVAL_FORCED); | |
7668fdbe | 1674 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1675 | |
870a5be8 | 1676 | return status; |
decf491f | 1677 | } |
1c606fb7 | 1678 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1679 | |
70ca8852 | 1680 | /** |
a08a8cd3 | 1681 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
70ca8852 TM |
1682 | * @inode - pointer to inode |
1683 | * @fattr - updated attributes | |
1684 | * | |
1685 | * After an operation that has changed the inode metadata, mark the | |
1686 | * attribute cache as being invalid, then try to update it. Fake up | |
1687 | * weak cache consistency data, if none exist. | |
1688 | * | |
1689 | * This function is mainly designed to be used by the ->write_done() functions. | |
1690 | */ | |
a08a8cd3 | 1691 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
70ca8852 | 1692 | { |
d65f557f TM |
1693 | int status; |
1694 | ||
d65f557f TM |
1695 | /* Don't do a WCC update if these attributes are already stale */ |
1696 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1697 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1698 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1699 | | NFS_ATTR_FATTR_PRESIZE | |
1700 | | NFS_ATTR_FATTR_PREMTIME | |
1701 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1702 | goto out_noforce; |
1703 | } | |
9e6e70f8 TM |
1704 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1705 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
1eb5d98f | 1706 | fattr->pre_change_attr = inode_peek_iversion_raw(inode); |
9e6e70f8 | 1707 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1708 | } |
9e6e70f8 TM |
1709 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1710 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
95582b00 | 1711 | fattr->pre_ctime = timespec64_to_timespec(inode->i_ctime); |
9e6e70f8 TM |
1712 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1713 | } | |
1714 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1715 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
95582b00 | 1716 | fattr->pre_mtime = timespec64_to_timespec(inode->i_mtime); |
9e6e70f8 TM |
1717 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1718 | } | |
1719 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1720 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1721 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1722 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1723 | } |
d65f557f | 1724 | out_noforce: |
16e14375 TM |
1725 | status = nfs_post_op_update_inode_locked(inode, fattr, |
1726 | NFS_INO_INVALID_CHANGE | |
1727 | | NFS_INO_INVALID_CTIME | |
1728 | | NFS_INO_INVALID_MTIME); | |
a08a8cd3 TM |
1729 | return status; |
1730 | } | |
1731 | ||
1732 | /** | |
1733 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1734 | * @inode - pointer to inode | |
1735 | * @fattr - updated attributes | |
1736 | * | |
1737 | * After an operation that has changed the inode metadata, mark the | |
1738 | * attribute cache as being invalid, then try to update it. Fake up | |
1739 | * weak cache consistency data, if none exist. | |
1740 | * | |
1741 | * This function is mainly designed to be used by the ->write_done() functions. | |
1742 | */ | |
1743 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1744 | { | |
1745 | int status; | |
1746 | ||
1747 | spin_lock(&inode->i_lock); | |
8f8ba1d7 | 1748 | nfs_fattr_set_barrier(fattr); |
a08a8cd3 | 1749 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
d65f557f TM |
1750 | spin_unlock(&inode->i_lock); |
1751 | return status; | |
70ca8852 | 1752 | } |
ddda8e0a | 1753 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1754 | |
ea96d1ec AS |
1755 | |
1756 | static inline bool nfs_fileid_valid(struct nfs_inode *nfsi, | |
1757 | struct nfs_fattr *fattr) | |
1758 | { | |
1759 | bool ret1 = true, ret2 = true; | |
1760 | ||
1761 | if (fattr->valid & NFS_ATTR_FATTR_FILEID) | |
1762 | ret1 = (nfsi->fileid == fattr->fileid); | |
1763 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1764 | ret2 = (nfsi->fileid == fattr->mounted_on_fileid); | |
1765 | return ret1 || ret2; | |
1766 | } | |
1767 | ||
1da177e4 LT |
1768 | /* |
1769 | * Many nfs protocol calls return the new file attributes after | |
1770 | * an operation. Here we update the inode to reflect the state | |
1771 | * of the server's inode. | |
1772 | * | |
1773 | * This is a bit tricky because we have to make sure all dirty pages | |
1774 | * have been sent off to the server before calling invalidate_inode_pages. | |
1775 | * To make sure no other process adds more write requests while we try | |
1776 | * our best to flush them, we make them sleep during the attribute refresh. | |
1777 | * | |
1778 | * A very similar scenario holds for the dir cache. | |
1779 | */ | |
24aa1fe6 | 1780 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1781 | { |
8b4bdcf8 | 1782 | struct nfs_server *server; |
1da177e4 | 1783 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1784 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1785 | unsigned long invalid = 0; |
3e7d950a | 1786 | unsigned long now = jiffies; |
62ab460c | 1787 | unsigned long save_cache_validity; |
651b0e70 | 1788 | bool have_writers = nfs_file_has_buffered_writers(nfsi); |
944171cb | 1789 | bool cache_revalidated = true; |
0b467264 | 1790 | bool attr_changed = false; |
c80d17c5 | 1791 | bool have_delegation; |
1da177e4 | 1792 | |
1e8968c5 | 1793 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1794 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1795 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1796 | atomic_read(&inode->i_count), fattr->valid); |
1797 | ||
ea96d1ec | 1798 | if (!nfs_fileid_valid(nfsi, fattr)) { |
e73e6c9e MT |
1799 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
1800 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1801 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1802 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1803 | (long long)fattr->fileid); | |
1804 | goto out_err; | |
1805 | } | |
1da177e4 LT |
1806 | |
1807 | /* | |
1808 | * Make sure the inode's type hasn't changed. | |
1809 | */ | |
e73e6c9e MT |
1810 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1811 | /* | |
1812 | * Big trouble! The inode has become a different object. | |
1813 | */ | |
1e8968c5 | 1814 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1815 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1816 | goto out_err; | |
1817 | } | |
1da177e4 | 1818 | |
8b4bdcf8 | 1819 | server = NFS_SERVER(inode); |
a0356862 | 1820 | /* Update the fsid? */ |
9e6e70f8 | 1821 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1822 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1823 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1824 | server->fsid = fattr->fsid; |
1825 | ||
c80d17c5 TM |
1826 | /* Save the delegation state before clearing cache_validity */ |
1827 | have_delegation = nfs_have_delegated_attributes(inode); | |
1828 | ||
1da177e4 LT |
1829 | /* |
1830 | * Update the read time so we don't revalidate too often. | |
1831 | */ | |
33801147 | 1832 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1833 | |
62ab460c TM |
1834 | save_cache_validity = nfsi->cache_validity; |
1835 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1836 | | NFS_INO_INVALID_ATIME | |
1837 | | NFS_INO_REVAL_FORCED | |
1838 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1839 | |
a895b4a1 | 1840 | /* Do atomic weak cache consistency updates */ |
783b194c | 1841 | nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1842 | |
944171cb BC |
1843 | if (pnfs_layoutcommit_outstanding(inode)) { |
1844 | nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR; | |
1845 | cache_revalidated = false; | |
1846 | } | |
10b7e9ad | 1847 | |
47aabaa7 | 1848 | /* More cache consistency checks */ |
9e6e70f8 | 1849 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
c472c07b | 1850 | if (!inode_eq_iversion_raw(inode, fattr->change_attr)) { |
38512aa9 | 1851 | /* Could it be a race with writeback? */ |
c80d17c5 | 1852 | if (!(have_writers || have_delegation)) { |
0b467264 | 1853 | invalid |= NFS_INO_INVALID_DATA |
38512aa9 TM |
1854 | | NFS_INO_INVALID_ACCESS |
1855 | | NFS_INO_INVALID_ACL; | |
cac88f94 | 1856 | /* Force revalidate of all attributes */ |
16e14375 TM |
1857 | save_cache_validity |= NFS_INO_INVALID_CTIME |
1858 | | NFS_INO_INVALID_MTIME | |
1859 | | NFS_INO_INVALID_SIZE | |
1860 | | NFS_INO_INVALID_OTHER; | |
38512aa9 TM |
1861 | if (S_ISDIR(inode->i_mode)) |
1862 | nfs_force_lookup_revalidate(inode); | |
c80d17c5 TM |
1863 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1864 | inode->i_sb->s_id, | |
1865 | inode->i_ino); | |
38512aa9 | 1866 | } |
1eb5d98f | 1867 | inode_set_iversion_raw(inode, fattr->change_attr); |
0b467264 | 1868 | attr_changed = true; |
9e6e70f8 | 1869 | } |
ade14a7d | 1870 | } else { |
8619ddd0 | 1871 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1872 | (NFS_INO_INVALID_CHANGE |
8619ddd0 TM |
1873 | | NFS_INO_REVAL_PAGECACHE |
1874 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1875 | cache_revalidated = false; |
1876 | } | |
9e6e70f8 TM |
1877 | |
1878 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
95582b00 | 1879 | inode->i_mtime = timespec_to_timespec64(fattr->mtime); |
ade14a7d | 1880 | } else if (server->caps & NFS_CAP_MTIME) { |
43b6535e | 1881 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1882 | (NFS_INO_INVALID_MTIME |
62ab460c | 1883 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1884 | cache_revalidated = false; |
1885 | } | |
62ab460c | 1886 | |
9e6e70f8 | 1887 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
95582b00 | 1888 | inode->i_ctime = timespec_to_timespec64(fattr->ctime); |
ade14a7d | 1889 | } else if (server->caps & NFS_CAP_CTIME) { |
43b6535e | 1890 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1891 | (NFS_INO_INVALID_CTIME |
62ab460c | 1892 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1893 | cache_revalidated = false; |
1894 | } | |
47aabaa7 | 1895 | |
951a143b | 1896 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1897 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1898 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1899 | cur_isize = i_size_read(inode); | |
c80d17c5 | 1900 | if (new_isize != cur_isize && !have_delegation) { |
9e6e70f8 TM |
1901 | /* Do we perhaps have any outstanding writes, or has |
1902 | * the file grown beyond our last write? */ | |
a6b6d5b8 | 1903 | if (!nfs_have_writebacks(inode) || new_isize > cur_isize) { |
9e6e70f8 | 1904 | i_size_write(inode, new_isize); |
ca0daa27 | 1905 | if (!have_writers) |
16e14375 | 1906 | invalid |= NFS_INO_INVALID_DATA; |
0b467264 | 1907 | attr_changed = true; |
9e6e70f8 | 1908 | } |
60c16ea8 HJ |
1909 | dprintk("NFS: isize change on server for file %s/%ld " |
1910 | "(%Ld to %Ld)\n", | |
1911 | inode->i_sb->s_id, | |
1912 | inode->i_ino, | |
1913 | (long long)cur_isize, | |
1914 | (long long)new_isize); | |
1da177e4 | 1915 | } |
ade14a7d | 1916 | } else { |
43b6535e | 1917 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1918 | (NFS_INO_INVALID_SIZE |
62ab460c TM |
1919 | | NFS_INO_REVAL_PAGECACHE |
1920 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1921 | cache_revalidated = false; |
1922 | } | |
1da177e4 | 1923 | |
1da177e4 | 1924 | |
9e6e70f8 | 1925 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
95582b00 | 1926 | inode->i_atime = timespec_to_timespec64(fattr->atime); |
ade14a7d | 1927 | else if (server->caps & NFS_CAP_ATIME) { |
43b6535e TM |
1928 | nfsi->cache_validity |= save_cache_validity & |
1929 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1930 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1931 | cache_revalidated = false; |
1932 | } | |
1da177e4 | 1933 | |
9e6e70f8 TM |
1934 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1935 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1936 | umode_t newmode = inode->i_mode & S_IFMT; |
1937 | newmode |= fattr->mode & S_IALLUGO; | |
1938 | inode->i_mode = newmode; | |
16e14375 | 1939 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 TM |
1940 | | NFS_INO_INVALID_ACL; |
1941 | attr_changed = true; | |
9e6e70f8 | 1942 | } |
ade14a7d | 1943 | } else if (server->caps & NFS_CAP_MODE) { |
43b6535e | 1944 | nfsi->cache_validity |= save_cache_validity & |
0b467264 | 1945 | (NFS_INO_INVALID_OTHER |
62ab460c | 1946 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1947 | cache_revalidated = false; |
1948 | } | |
62ab460c | 1949 | |
9e6e70f8 | 1950 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1951 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
16e14375 | 1952 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 | 1953 | | NFS_INO_INVALID_ACL; |
9e6e70f8 | 1954 | inode->i_uid = fattr->uid; |
0b467264 | 1955 | attr_changed = true; |
9e6e70f8 | 1956 | } |
ade14a7d | 1957 | } else if (server->caps & NFS_CAP_OWNER) { |
43b6535e | 1958 | nfsi->cache_validity |= save_cache_validity & |
0b467264 | 1959 | (NFS_INO_INVALID_OTHER |
62ab460c | 1960 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1961 | cache_revalidated = false; |
1962 | } | |
62ab460c | 1963 | |
9e6e70f8 | 1964 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1965 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
16e14375 | 1966 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 | 1967 | | NFS_INO_INVALID_ACL; |
9e6e70f8 | 1968 | inode->i_gid = fattr->gid; |
0b467264 | 1969 | attr_changed = true; |
9e6e70f8 | 1970 | } |
ade14a7d | 1971 | } else if (server->caps & NFS_CAP_OWNER_GROUP) { |
43b6535e | 1972 | nfsi->cache_validity |= save_cache_validity & |
0b467264 | 1973 | (NFS_INO_INVALID_OTHER |
62ab460c | 1974 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1975 | cache_revalidated = false; |
1976 | } | |
921615f1 | 1977 | |
9e6e70f8 TM |
1978 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1979 | if (inode->i_nlink != fattr->nlink) { | |
9e6e70f8 TM |
1980 | if (S_ISDIR(inode->i_mode)) |
1981 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1982 | set_nlink(inode, fattr->nlink); |
0b467264 | 1983 | attr_changed = true; |
9e6e70f8 | 1984 | } |
ade14a7d | 1985 | } else if (server->caps & NFS_CAP_NLINK) { |
43b6535e | 1986 | nfsi->cache_validity |= save_cache_validity & |
16e14375 | 1987 | (NFS_INO_INVALID_OTHER |
62ab460c | 1988 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1989 | cache_revalidated = false; |
1990 | } | |
1da177e4 | 1991 | |
9e6e70f8 | 1992 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1993 | /* |
1994 | * report the blocks in 512byte units | |
1995 | */ | |
1996 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
ade14a7d | 1997 | } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
9e6e70f8 | 1998 | inode->i_blocks = fattr->du.nfs2.blocks; |
ade14a7d TM |
1999 | else |
2000 | cache_revalidated = false; | |
1da177e4 LT |
2001 | |
2002 | /* Update attrtimeo value if we're out of the unstable period */ | |
0b467264 | 2003 | if (attr_changed) { |
cac88f94 | 2004 | invalid &= ~NFS_INO_INVALID_ATTR; |
91d5b470 | 2005 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 2006 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 2007 | nfsi->attrtimeo_timestamp = now; |
f5062003 | 2008 | /* Set barrier to be more recent than all outstanding updates */ |
4704f0e2 | 2009 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 2010 | } else { |
ade14a7d TM |
2011 | if (cache_revalidated) { |
2012 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, | |
2013 | nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { | |
2014 | nfsi->attrtimeo <<= 1; | |
2015 | if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode)) | |
2016 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
2017 | } | |
6d2b2966 TM |
2018 | nfsi->attrtimeo_timestamp = now; |
2019 | } | |
f5062003 TM |
2020 | /* Set the barrier to be more recent than this fattr */ |
2021 | if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) | |
2022 | nfsi->attr_gencount = fattr->gencount; | |
1da177e4 | 2023 | } |
c812012f | 2024 | |
1da177e4 LT |
2025 | /* Don't invalidate the data if we were to blame */ |
2026 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
2027 | || S_ISLNK(inode->i_mode))) | |
2028 | invalid &= ~NFS_INO_INVALID_DATA; | |
c80d17c5 | 2029 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 2030 | |
1da177e4 | 2031 | return 0; |
b37b03b7 | 2032 | out_err: |
1da177e4 LT |
2033 | /* |
2034 | * No need to worry about unhashing the dentry, as the | |
2035 | * lookup validation will know that the inode is bad. | |
2036 | * (But we fall through to invalidate the caches.) | |
2037 | */ | |
2038 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
2039 | return -ESTALE; |
2040 | } | |
2041 | ||
f7b422b1 | 2042 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
2043 | { |
2044 | struct nfs_inode *nfsi; | |
c456aacf | 2045 | nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
2046 | if (!nfsi) |
2047 | return NULL; | |
55296809 CL |
2048 | nfsi->flags = 0UL; |
2049 | nfsi->cache_validity = 0UL; | |
89d77c8f | 2050 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
2051 | nfsi->nfs4_acl = NULL; |
2052 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
2053 | return &nfsi->vfs_inode; |
2054 | } | |
89d77c8f | 2055 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 2056 | |
fa0d7e3d | 2057 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 2058 | { |
fa0d7e3d | 2059 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
2060 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
2061 | } | |
2062 | ||
fa0d7e3d NP |
2063 | void nfs_destroy_inode(struct inode *inode) |
2064 | { | |
2065 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
2066 | } | |
89d77c8f | 2067 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 2068 | |
d75d5414 AM |
2069 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
2070 | { | |
89d77c8f | 2071 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
2072 | INIT_LIST_HEAD(&nfsi->open_states); |
2073 | nfsi->delegation = NULL; | |
d75d5414 | 2074 | init_rwsem(&nfsi->rwsem); |
e5e94017 | 2075 | nfsi->layout = NULL; |
d75d5414 AM |
2076 | #endif |
2077 | } | |
f7b422b1 | 2078 | |
51cc5068 | 2079 | static void init_once(void *foo) |
1da177e4 LT |
2080 | { |
2081 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
2082 | ||
a35afb83 | 2083 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
2084 | INIT_LIST_HEAD(&nfsi->open_files); |
2085 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
2086 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 2087 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a6b6d5b8 | 2088 | atomic_long_set(&nfsi->nrequests, 0); |
5cb953d4 | 2089 | atomic_long_set(&nfsi->commit_info.ncommit, 0); |
1a0de48a | 2090 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
884be175 | 2091 | init_rwsem(&nfsi->rmdir_sem); |
e824f99a | 2092 | mutex_init(&nfsi->commit_mutex); |
a35afb83 | 2093 | nfs4_init_once(nfsi); |
1da177e4 | 2094 | } |
20c2df83 | 2095 | |
f7b422b1 | 2096 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
2097 | { |
2098 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
2099 | sizeof(struct nfs_inode), | |
fffb60f9 | 2100 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 2101 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 2102 | init_once); |
1da177e4 LT |
2103 | if (nfs_inode_cachep == NULL) |
2104 | return -ENOMEM; | |
2105 | ||
2106 | return 0; | |
2107 | } | |
2108 | ||
266bee88 | 2109 | static void nfs_destroy_inodecache(void) |
1da177e4 | 2110 | { |
8c0a8537 KS |
2111 | /* |
2112 | * Make sure all delayed rcu free inodes are flushed before we | |
2113 | * destroy cache. | |
2114 | */ | |
2115 | rcu_barrier(); | |
1a1d92c1 | 2116 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
2117 | } |
2118 | ||
5746006f | 2119 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 2120 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
2121 | |
2122 | /* | |
2123 | * start up the nfsiod workqueue | |
2124 | */ | |
2125 | static int nfsiod_start(void) | |
2126 | { | |
2127 | struct workqueue_struct *wq; | |
2128 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 2129 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
2130 | if (wq == NULL) |
2131 | return -ENOMEM; | |
2132 | nfsiod_workqueue = wq; | |
2133 | return 0; | |
2134 | } | |
2135 | ||
2136 | /* | |
2137 | * Destroy the nfsiod workqueue | |
2138 | */ | |
2139 | static void nfsiod_stop(void) | |
2140 | { | |
2141 | struct workqueue_struct *wq; | |
2142 | ||
2143 | wq = nfsiod_workqueue; | |
2144 | if (wq == NULL) | |
2145 | return; | |
2146 | nfsiod_workqueue = NULL; | |
2147 | destroy_workqueue(wq); | |
2148 | } | |
2149 | ||
c7d03a00 | 2150 | unsigned int nfs_net_id; |
9e2e74db | 2151 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
2152 | |
2153 | static int nfs_net_init(struct net *net) | |
2154 | { | |
6b13168b | 2155 | nfs_clients_init(net); |
65b38851 | 2156 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
2157 | } |
2158 | ||
2159 | static void nfs_net_exit(struct net *net) | |
2160 | { | |
b0b5352d VA |
2161 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
2162 | ||
65b38851 | 2163 | nfs_fs_proc_net_exit(net); |
28cd1b3f | 2164 | nfs_cleanup_cb_ident_idr(net); |
b0b5352d VA |
2165 | WARN_ON_ONCE(!list_empty(&nn->nfs_client_list)); |
2166 | WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list)); | |
1b340d01 SK |
2167 | } |
2168 | ||
2169 | static struct pernet_operations nfs_net_ops = { | |
2170 | .init = nfs_net_init, | |
2171 | .exit = nfs_net_exit, | |
2172 | .id = &nfs_net_id, | |
2173 | .size = sizeof(struct nfs_net), | |
2174 | }; | |
2175 | ||
1da177e4 LT |
2176 | /* |
2177 | * Initialize NFS | |
2178 | */ | |
2179 | static int __init init_nfs_fs(void) | |
2180 | { | |
2181 | int err; | |
2182 | ||
1b340d01 | 2183 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 2184 | if (err < 0) |
89d77c8f | 2185 | goto out9; |
e571cbf1 | 2186 | |
8ec442ae DH |
2187 | err = nfs_fscache_register(); |
2188 | if (err < 0) | |
89d77c8f | 2189 | goto out8; |
8ec442ae | 2190 | |
5746006f TM |
2191 | err = nfsiod_start(); |
2192 | if (err) | |
89d77c8f | 2193 | goto out7; |
5746006f | 2194 | |
6aaca566 DH |
2195 | err = nfs_fs_proc_init(); |
2196 | if (err) | |
89d77c8f | 2197 | goto out6; |
6aaca566 | 2198 | |
1da177e4 LT |
2199 | err = nfs_init_nfspagecache(); |
2200 | if (err) | |
89d77c8f | 2201 | goto out5; |
1da177e4 LT |
2202 | |
2203 | err = nfs_init_inodecache(); | |
2204 | if (err) | |
89d77c8f | 2205 | goto out4; |
1da177e4 LT |
2206 | |
2207 | err = nfs_init_readpagecache(); | |
2208 | if (err) | |
89d77c8f | 2209 | goto out3; |
1da177e4 LT |
2210 | |
2211 | err = nfs_init_writepagecache(); | |
2212 | if (err) | |
89d77c8f | 2213 | goto out2; |
1da177e4 | 2214 | |
1da177e4 LT |
2215 | err = nfs_init_directcache(); |
2216 | if (err) | |
89d77c8f | 2217 | goto out1; |
1da177e4 | 2218 | |
ec7652aa | 2219 | rpc_proc_register(&init_net, &nfs_rpcstat); |
cd738ee9 KM |
2220 | |
2221 | err = register_nfs_fs(); | |
2222 | if (err) | |
129d1977 BS |
2223 | goto out0; |
2224 | ||
1da177e4 | 2225 | return 0; |
129d1977 | 2226 | out0: |
ec7652aa | 2227 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2228 | nfs_destroy_directcache(); |
89d77c8f | 2229 | out1: |
129d1977 | 2230 | nfs_destroy_writepagecache(); |
89d77c8f | 2231 | out2: |
129d1977 | 2232 | nfs_destroy_readpagecache(); |
89d77c8f | 2233 | out3: |
129d1977 | 2234 | nfs_destroy_inodecache(); |
89d77c8f | 2235 | out4: |
129d1977 | 2236 | nfs_destroy_nfspagecache(); |
89d77c8f | 2237 | out5: |
129d1977 | 2238 | nfs_fs_proc_exit(); |
89d77c8f | 2239 | out6: |
129d1977 | 2240 | nfsiod_stop(); |
89d77c8f | 2241 | out7: |
129d1977 | 2242 | nfs_fscache_unregister(); |
89d77c8f | 2243 | out8: |
129d1977 | 2244 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 2245 | out9: |
1da177e4 LT |
2246 | return err; |
2247 | } | |
2248 | ||
2249 | static void __exit exit_nfs_fs(void) | |
2250 | { | |
1da177e4 | 2251 | nfs_destroy_directcache(); |
1da177e4 LT |
2252 | nfs_destroy_writepagecache(); |
2253 | nfs_destroy_readpagecache(); | |
2254 | nfs_destroy_inodecache(); | |
2255 | nfs_destroy_nfspagecache(); | |
8ec442ae | 2256 | nfs_fscache_unregister(); |
1b340d01 | 2257 | unregister_pernet_subsys(&nfs_net_ops); |
ec7652aa | 2258 | rpc_proc_unregister(&init_net, "nfs"); |
f7b422b1 | 2259 | unregister_nfs_fs(); |
6aaca566 | 2260 | nfs_fs_proc_exit(); |
5746006f | 2261 | nfsiod_stop(); |
1da177e4 LT |
2262 | } |
2263 | ||
2264 | /* Not quite true; I just maintain it */ | |
2265 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2266 | MODULE_LICENSE("GPL"); | |
f43bf0be | 2267 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
2268 | |
2269 | module_init(init_nfs_fs) | |
2270 | module_exit(exit_nfs_fs) |