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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/init.h> | |
e8edc6e0 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
1da177e4 | 35 | #include <linux/vfs.h> |
9cdb3883 MN |
36 | #include <linux/inet.h> |
37 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
3fa0b4e2 | 39 | #include <linux/compat.h> |
d310310c | 40 | #include <linux/freezer.h> |
1da177e4 | 41 | |
1da177e4 LT |
42 | #include <asm/uaccess.h> |
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 | ||
72cb77f4 TM |
74 | /** |
75 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
76 | * @word: long word containing the bit lock | |
77 | */ | |
78 | int nfs_wait_bit_killable(void *word) | |
79 | { | |
80 | if (fatal_signal_pending(current)) | |
81 | return -ERESTARTSYS; | |
416ad3c9 | 82 | freezable_schedule_unsafe(); |
72cb77f4 TM |
83 | return 0; |
84 | } | |
89d77c8f | 85 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 86 | |
f43bf0be TM |
87 | /** |
88 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
89 | * @fileid: 64-bit fileid | |
90 | * | |
91 | * This function returns a 32-bit inode number if the boot parameter | |
92 | * nfs.enable_ino64 is zero. | |
93 | */ | |
94 | u64 nfs_compat_user_ino64(u64 fileid) | |
95 | { | |
3fa0b4e2 FF |
96 | #ifdef CONFIG_COMPAT |
97 | compat_ulong_t ino; | |
98 | #else | |
99 | unsigned long ino; | |
100 | #endif | |
f43bf0be TM |
101 | |
102 | if (enable_ino64) | |
103 | return fileid; | |
104 | ino = fileid; | |
105 | if (sizeof(ino) < sizeof(fileid)) | |
106 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
107 | return ino; | |
108 | } | |
109 | ||
eed99357 TM |
110 | int nfs_drop_inode(struct inode *inode) |
111 | { | |
112 | return NFS_STALE(inode) || generic_drop_inode(inode); | |
113 | } | |
114 | EXPORT_SYMBOL_GPL(nfs_drop_inode); | |
115 | ||
19d87ca3 | 116 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 117 | { |
da6d503a TM |
118 | /* |
119 | * The following should never happen... | |
120 | */ | |
f48407dd TM |
121 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
122 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); | |
ada70d94 | 123 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 124 | nfs_access_zap_cache(inode); |
f1fe29b4 | 125 | nfs_fscache_clear_inode(inode); |
1da177e4 | 126 | } |
89d77c8f | 127 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 128 | |
b57922d9 AV |
129 | void nfs_evict_inode(struct inode *inode) |
130 | { | |
131 | truncate_inode_pages(&inode->i_data, 0); | |
dbd5768f | 132 | clear_inode(inode); |
b57922d9 AV |
133 | nfs_clear_inode(inode); |
134 | } | |
135 | ||
29884df0 TM |
136 | /** |
137 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
138 | */ | |
139 | int nfs_sync_mapping(struct address_space *mapping) | |
140 | { | |
5cf95214 | 141 | int ret = 0; |
29884df0 | 142 | |
5cf95214 TM |
143 | if (mapping->nrpages != 0) { |
144 | unmap_mapping_range(mapping, 0, 0, 0); | |
145 | ret = nfs_wb_all(mapping->host); | |
146 | } | |
29884df0 TM |
147 | return ret; |
148 | } | |
149 | ||
1da177e4 LT |
150 | /* |
151 | * Invalidate the local caches | |
152 | */ | |
b37b03b7 | 153 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
154 | { |
155 | struct nfs_inode *nfsi = NFS_I(inode); | |
156 | int mode = inode->i_mode; | |
157 | ||
91d5b470 CL |
158 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
159 | ||
c7c20973 TM |
160 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
161 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 162 | |
c3f52af3 | 163 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
de242c0b | 164 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
de242c0b | 165 | nfs_fscache_invalidate(inode); |
aa9c2669 | 166 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
167 | | NFS_INO_INVALID_DATA |
168 | | NFS_INO_INVALID_ACCESS | |
169 | | NFS_INO_INVALID_ACL | |
170 | | NFS_INO_REVAL_PAGECACHE; | |
171 | } else | |
172 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
aa9c2669 DQ |
173 | | NFS_INO_INVALID_ACCESS |
174 | | NFS_INO_INVALID_ACL | |
175 | | NFS_INO_REVAL_PAGECACHE; | |
fd1defc2 | 176 | nfs_zap_label_cache_locked(nfsi); |
b37b03b7 | 177 | } |
dc59250c | 178 | |
b37b03b7 TM |
179 | void nfs_zap_caches(struct inode *inode) |
180 | { | |
181 | spin_lock(&inode->i_lock); | |
182 | nfs_zap_caches_locked(inode); | |
dc59250c | 183 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
184 | } |
185 | ||
cd9ae2b6 TM |
186 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
187 | { | |
188 | if (mapping->nrpages != 0) { | |
189 | spin_lock(&inode->i_lock); | |
190 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
de242c0b | 191 | nfs_fscache_invalidate(inode); |
cd9ae2b6 TM |
192 | spin_unlock(&inode->i_lock); |
193 | } | |
194 | } | |
195 | ||
f41f7418 | 196 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
197 | { |
198 | void (*clear_acl_cache)(struct inode *); | |
199 | ||
200 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
201 | if (clear_acl_cache != NULL) | |
202 | clear_acl_cache(inode); | |
dc59250c | 203 | spin_lock(&inode->i_lock); |
55296809 | 204 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 205 | spin_unlock(&inode->i_lock); |
1da177e4 | 206 | } |
1c606fb7 | 207 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 208 | |
c4812998 TM |
209 | void nfs_invalidate_atime(struct inode *inode) |
210 | { | |
211 | spin_lock(&inode->i_lock); | |
212 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
213 | spin_unlock(&inode->i_lock); | |
214 | } | |
ddda8e0a | 215 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 216 | |
1da177e4 | 217 | /* |
b37b03b7 TM |
218 | * Invalidate, but do not unhash, the inode. |
219 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 220 | */ |
b37b03b7 | 221 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 222 | { |
3a10c30a | 223 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 224 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
225 | } |
226 | ||
227 | struct nfs_find_desc { | |
228 | struct nfs_fh *fh; | |
229 | struct nfs_fattr *fattr; | |
230 | }; | |
231 | ||
232 | /* | |
233 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
234 | * this, and re-exported directories (also seen in NFSv2) | |
235 | * we are forced to allow 2 different inodes to have the same | |
236 | * i_ino. | |
237 | */ | |
238 | static int | |
239 | nfs_find_actor(struct inode *inode, void *opaque) | |
240 | { | |
241 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
242 | struct nfs_fh *fh = desc->fh; | |
243 | struct nfs_fattr *fattr = desc->fattr; | |
244 | ||
245 | if (NFS_FILEID(inode) != fattr->fileid) | |
246 | return 0; | |
f6488c9b JL |
247 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
248 | return 0; | |
1da177e4 LT |
249 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
250 | return 0; | |
251 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
252 | return 0; | |
253 | return 1; | |
254 | } | |
255 | ||
256 | static int | |
257 | nfs_init_locked(struct inode *inode, void *opaque) | |
258 | { | |
259 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
260 | struct nfs_fattr *fattr = desc->fattr; | |
261 | ||
99fadcd7 | 262 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
263 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
264 | return 0; | |
265 | } | |
266 | ||
e058f70b | 267 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
fd1defc2 TM |
268 | static void nfs_clear_label_invalid(struct inode *inode) |
269 | { | |
270 | spin_lock(&inode->i_lock); | |
271 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; | |
272 | spin_unlock(&inode->i_lock); | |
273 | } | |
274 | ||
aa9c2669 DQ |
275 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
276 | struct nfs4_label *label) | |
277 | { | |
278 | int error; | |
279 | ||
280 | if (label == NULL) | |
281 | return; | |
282 | ||
aa9c2669 DQ |
283 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
284 | error = security_inode_notifysecctx(inode, label->label, | |
285 | label->len); | |
286 | if (error) | |
287 | printk(KERN_ERR "%s() %s %d " | |
288 | "security_inode_notifysecctx() %d\n", | |
289 | __func__, | |
290 | (char *)label->label, | |
291 | label->len, error); | |
fd1defc2 | 292 | nfs_clear_label_invalid(inode); |
aa9c2669 DQ |
293 | } |
294 | } | |
295 | ||
e058f70b SD |
296 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
297 | { | |
298 | struct nfs4_label *label = NULL; | |
299 | int minor_version = server->nfs_client->cl_minorversion; | |
300 | ||
301 | if (minor_version < 2) | |
302 | return label; | |
303 | ||
304 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
305 | return label; | |
306 | ||
307 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
308 | if (label == NULL) | |
309 | return ERR_PTR(-ENOMEM); | |
310 | ||
311 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
312 | if (label->label == NULL) { | |
313 | kfree(label); | |
314 | return ERR_PTR(-ENOMEM); | |
315 | } | |
316 | label->len = NFS4_MAXLABELLEN; | |
317 | ||
318 | return label; | |
319 | } | |
320 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 321 | #else |
829e57d7 | 322 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
aa9c2669 DQ |
323 | struct nfs4_label *label) |
324 | { | |
325 | } | |
e058f70b | 326 | #endif |
aa9c2669 | 327 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 328 | |
1da177e4 LT |
329 | /* |
330 | * This is our front-end to iget that looks up inodes by file handle | |
331 | * instead of inode number. | |
332 | */ | |
333 | struct inode * | |
1775fd3e | 334 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
335 | { |
336 | struct nfs_find_desc desc = { | |
337 | .fh = fh, | |
338 | .fattr = fattr | |
339 | }; | |
03f28e3a | 340 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
341 | unsigned long hash; |
342 | ||
7ebb9315 BS |
343 | nfs_attr_check_mountpoint(sb, fattr); |
344 | ||
533eb461 AA |
345 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
346 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 347 | goto out_no_inode; |
9e6e70f8 | 348 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 349 | goto out_no_inode; |
1da177e4 LT |
350 | |
351 | hash = nfs_fattr_to_ino_t(fattr); | |
352 | ||
03f28e3a TM |
353 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
354 | if (inode == NULL) { | |
355 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 356 | goto out_no_inode; |
03f28e3a | 357 | } |
1da177e4 LT |
358 | |
359 | if (inode->i_state & I_NEW) { | |
360 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 361 | unsigned long now = jiffies; |
1da177e4 LT |
362 | |
363 | /* We set i_ino for the few things that still rely on it, | |
364 | * such as stat(2) */ | |
365 | inode->i_ino = hash; | |
366 | ||
367 | /* We can't support update_atime(), since the server will reset it */ | |
368 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
369 | inode->i_mode = fattr->mode; | |
62ab460c TM |
370 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
371 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
4124bbc5 | 372 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
373 | /* Why so? Because we want revalidate for devices/FIFOs, and |
374 | * that's precisely what we have in nfs_file_inode_operations. | |
375 | */ | |
8fa5c000 | 376 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 377 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 378 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
379 | inode->i_data.a_ops = &nfs_file_aops; |
380 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
381 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 382 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 383 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 384 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 385 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
386 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
387 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
388 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
389 | inode->i_op = &nfs_referral_inode_operations; | |
390 | else | |
391 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 392 | inode->i_fop = NULL; |
36d43a43 | 393 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 394 | } |
1da177e4 LT |
395 | } else if (S_ISLNK(inode->i_mode)) |
396 | inode->i_op = &nfs_symlink_inode_operations; | |
397 | else | |
398 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
399 | ||
9e6e70f8 TM |
400 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
401 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
402 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 403 | inode->i_version = 0; |
9e6e70f8 | 404 | inode->i_size = 0; |
6d6b77f1 | 405 | clear_nlink(inode); |
9ff593c4 EB |
406 | inode->i_uid = make_kuid(&init_user_ns, -2); |
407 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
408 | inode->i_blocks = 0; |
409 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
410 | nfsi->write_io = 0; |
411 | nfsi->read_io = 0; | |
9e6e70f8 | 412 | |
33801147 | 413 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 414 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
415 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
416 | inode->i_atime = fattr->atime; | |
62ab460c TM |
417 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
418 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
419 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
420 | inode->i_mtime = fattr->mtime; | |
62ab460c | 421 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
4124bbc5 | 422 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
423 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
424 | inode->i_ctime = fattr->ctime; | |
62ab460c | 425 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
4124bbc5 | 426 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 | 427 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 428 | inode->i_version = fattr->change_attr; |
62ab460c | 429 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
4124bbc5 | 430 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
431 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
432 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
433 | else |
434 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
62ab460c | 435 | | NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 436 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 437 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
438 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
439 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
440 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
441 | inode->i_uid = fattr->uid; | |
62ab460c | 442 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
4124bbc5 | 443 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
444 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
445 | inode->i_gid = fattr->gid; | |
62ab460c | 446 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
4124bbc5 | 447 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
448 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
449 | inode->i_blocks = fattr->du.nfs2.blocks; | |
450 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
451 | /* |
452 | * report the blocks in 512byte units | |
453 | */ | |
454 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 455 | } |
aa9c2669 DQ |
456 | |
457 | nfs_setsecurity(inode, fattr, label); | |
458 | ||
1da177e4 | 459 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 460 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 461 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 462 | |
f1fe29b4 | 463 | nfs_fscache_init_inode(inode); |
ef79c097 | 464 | |
1da177e4 LT |
465 | unlock_new_inode(inode); |
466 | } else | |
467 | nfs_refresh_inode(inode, fattr); | |
1e8968c5 | 468 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 469 | inode->i_sb->s_id, |
1e8968c5 | 470 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 471 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
472 | atomic_read(&inode->i_count)); |
473 | ||
474 | out: | |
475 | return inode; | |
476 | ||
477 | out_no_inode: | |
03f28e3a | 478 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
479 | goto out; |
480 | } | |
89d77c8f | 481 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 482 | |
536e43d1 | 483 | #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 |
484 | |
485 | int | |
486 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
487 | { | |
488 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
489 | struct nfs_fattr *fattr; |
490 | int error = -ENOMEM; | |
1da177e4 | 491 | |
91d5b470 CL |
492 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
493 | ||
188b95dd JL |
494 | /* skip mode change if it's just for clearing setuid/setgid */ |
495 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
496 | attr->ia_valid &= ~ATTR_MODE; | |
497 | ||
1da177e4 LT |
498 | if (attr->ia_valid & ATTR_SIZE) { |
499 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
500 | attr->ia_valid &= ~ATTR_SIZE; | |
501 | } | |
502 | ||
503 | /* Optimization: if the end result is no change, don't RPC */ | |
504 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 505 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
506 | return 0; |
507 | ||
f4ce1299 TM |
508 | trace_nfs_setattr_enter(inode); |
509 | ||
755c1e20 | 510 | /* Write all dirty data */ |
1d59d61f TM |
511 | if (S_ISREG(inode->i_mode)) { |
512 | nfs_inode_dio_wait(inode); | |
e1552e19 | 513 | nfs_wb_all(inode); |
1d59d61f | 514 | } |
987f8dfc TM |
515 | |
516 | fattr = nfs_alloc_fattr(); | |
517 | if (fattr == NULL) | |
518 | goto out; | |
642ac549 TM |
519 | /* |
520 | * Return any delegations if we're going to change ACLs | |
521 | */ | |
522 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 523 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 524 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 525 | if (error == 0) |
aa9c2669 | 526 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
527 | nfs_free_fattr(fattr); |
528 | out: | |
f4ce1299 | 529 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
530 | return error; |
531 | } | |
ddda8e0a | 532 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 533 | |
a3d01454 TM |
534 | /** |
535 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
536 | * @inode: inode of the file used | |
537 | * @offset: file offset to start truncating | |
538 | * | |
539 | * This is a copy of the common vmtruncate, but with the locking | |
540 | * corrected to take into account the fact that NFS requires | |
541 | * inode->i_size to be updated under the inode->i_lock. | |
542 | */ | |
543 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
544 | { | |
c08d3b0e | 545 | int err; |
a3d01454 | 546 | |
c08d3b0e | 547 | err = inode_newsize_ok(inode, offset); |
548 | if (err) | |
549 | goto out; | |
a3d01454 | 550 | |
c08d3b0e | 551 | spin_lock(&inode->i_lock); |
c08d3b0e | 552 | i_size_write(inode, offset); |
553 | spin_unlock(&inode->i_lock); | |
554 | ||
7caef267 | 555 | truncate_pagecache(inode, offset); |
c08d3b0e | 556 | out: |
557 | return err; | |
a3d01454 TM |
558 | } |
559 | ||
65e4308d TM |
560 | /** |
561 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
562 | * @inode: pointer to struct inode | |
563 | * @attr: pointer to struct iattr | |
564 | * | |
565 | * Note: we do this in the *proc.c in order to ensure that | |
566 | * it works for things like exclusive creates too. | |
567 | */ | |
568 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
569 | { | |
570 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 571 | spin_lock(&inode->i_lock); |
1da177e4 | 572 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
573 | int mode = attr->ia_mode & S_IALLUGO; |
574 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
575 | inode->i_mode = mode; |
576 | } | |
577 | if ((attr->ia_valid & ATTR_UID) != 0) | |
578 | inode->i_uid = attr->ia_uid; | |
579 | if ((attr->ia_valid & ATTR_GID) != 0) | |
580 | inode->i_gid = attr->ia_gid; | |
55296809 | 581 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 582 | spin_unlock(&inode->i_lock); |
65e4308d TM |
583 | } |
584 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 585 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 586 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 587 | } |
1da177e4 | 588 | } |
ddda8e0a | 589 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 590 | |
1da177e4 LT |
591 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
592 | { | |
593 | struct inode *inode = dentry->d_inode; | |
55296809 | 594 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
595 | int err; |
596 | ||
f4ce1299 | 597 | trace_nfs_getattr_enter(inode); |
acdc53b2 | 598 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 599 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 600 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
601 | err = filemap_write_and_wait(inode->i_mapping); |
602 | if (err) | |
603 | goto out; | |
28c494c5 | 604 | } |
fc33a7bb CH |
605 | |
606 | /* | |
607 | * We may force a getattr if the user cares about atime. | |
608 | * | |
609 | * Note that we only have to check the vfsmount flags here: | |
610 | * - NFS always sets S_NOATIME by so checking it would give a | |
611 | * bogus result | |
612 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
613 | * no point in checking those. | |
614 | */ | |
615 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
616 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 617 | need_atime = 0; |
fc33a7bb | 618 | |
1da177e4 LT |
619 | if (need_atime) |
620 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
621 | else | |
622 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 623 | if (!err) { |
1da177e4 | 624 | generic_fillattr(inode, stat); |
f43bf0be | 625 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 626 | } |
acdc53b2 | 627 | out: |
f4ce1299 | 628 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
629 | return err; |
630 | } | |
ddda8e0a | 631 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 632 | |
f11ac8db TM |
633 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
634 | { | |
635 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
636 | l_ctx->lockowner.l_owner = current->files; |
637 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 638 | INIT_LIST_HEAD(&l_ctx->list); |
577b4232 | 639 | nfs_iocounter_init(&l_ctx->io_count); |
f11ac8db TM |
640 | } |
641 | ||
642 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
643 | { | |
8c86899f TM |
644 | struct nfs_lock_context *head = &ctx->lock_context; |
645 | struct nfs_lock_context *pos = head; | |
f11ac8db | 646 | |
8c86899f | 647 | do { |
2a369153 | 648 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 649 | continue; |
2a369153 | 650 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
651 | continue; |
652 | atomic_inc(&pos->count); | |
653 | return pos; | |
8c86899f | 654 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
655 | return NULL; |
656 | } | |
657 | ||
658 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
659 | { | |
660 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 661 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
662 | |
663 | spin_lock(&inode->i_lock); | |
664 | res = __nfs_find_lock_context(ctx); | |
665 | if (res == NULL) { | |
666 | spin_unlock(&inode->i_lock); | |
667 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
668 | if (new == NULL) | |
b3c54de6 | 669 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
670 | nfs_init_lock_context(new); |
671 | spin_lock(&inode->i_lock); | |
672 | res = __nfs_find_lock_context(ctx); | |
673 | if (res == NULL) { | |
674 | list_add_tail(&new->list, &ctx->lock_context.list); | |
675 | new->open_context = ctx; | |
676 | res = new; | |
677 | new = NULL; | |
678 | } | |
679 | } | |
680 | spin_unlock(&inode->i_lock); | |
681 | kfree(new); | |
682 | return res; | |
683 | } | |
684 | ||
685 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
686 | { | |
687 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 688 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
689 | |
690 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
691 | return; | |
692 | list_del(&l_ctx->list); | |
693 | spin_unlock(&inode->i_lock); | |
694 | kfree(l_ctx); | |
695 | } | |
696 | ||
7fe5c398 TM |
697 | /** |
698 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
699 | * @ctx: pointer to context | |
700 | * @is_sync: is this a synchronous close | |
701 | * | |
702 | * always ensure that the attributes are up to date if we're mounted | |
703 | * with close-to-open semantics | |
704 | */ | |
705 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
706 | { | |
707 | struct inode *inode; | |
708 | struct nfs_server *server; | |
709 | ||
710 | if (!(ctx->mode & FMODE_WRITE)) | |
711 | return; | |
712 | if (!is_sync) | |
713 | return; | |
3d4ff43d | 714 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
715 | if (!list_empty(&NFS_I(inode)->open_files)) |
716 | return; | |
717 | server = NFS_SERVER(inode); | |
718 | if (server->flags & NFS_MOUNT_NOCTO) | |
719 | return; | |
720 | nfs_revalidate_inode(server, inode); | |
721 | } | |
ddda8e0a | 722 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 723 | |
5ede7b1c | 724 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
725 | { |
726 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
727 | struct rpc_cred *cred = rpc_lookup_cred(); |
728 | if (IS_ERR(cred)) | |
729 | return ERR_CAST(cred); | |
1da177e4 | 730 | |
f52720ca | 731 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
732 | if (!ctx) { |
733 | put_rpccred(cred); | |
734 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 735 | } |
5ede7b1c AV |
736 | nfs_sb_active(dentry->d_sb); |
737 | ctx->dentry = dget(dentry); | |
738 | ctx->cred = cred; | |
739 | ctx->state = NULL; | |
740 | ctx->mode = f_mode; | |
741 | ctx->flags = 0; | |
742 | ctx->error = 0; | |
743 | nfs_init_lock_context(&ctx->lock_context); | |
744 | ctx->lock_context.open_context = ctx; | |
745 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 746 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
747 | return ctx; |
748 | } | |
89d77c8f | 749 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
750 | |
751 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
752 | { | |
753 | if (ctx != NULL) | |
f11ac8db | 754 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
755 | return ctx; |
756 | } | |
89d77c8f | 757 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 758 | |
7fe5c398 | 759 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 760 | { |
3d4ff43d AV |
761 | struct inode *inode = ctx->dentry->d_inode; |
762 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 763 | |
5c78f58e | 764 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
765 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
766 | return; | |
767 | list_del(&ctx->list); | |
768 | spin_unlock(&inode->i_lock); | |
ef84303e | 769 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 770 | return; |
5c78f58e TM |
771 | if (inode != NULL) |
772 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
773 | if (ctx->cred != NULL) |
774 | put_rpccred(ctx->cred); | |
3d4ff43d | 775 | dput(ctx->dentry); |
322b2b90 | 776 | nfs_sb_deactive(sb); |
82be417a | 777 | kfree(ctx->mdsthreshold); |
3bec63db TM |
778 | kfree(ctx); |
779 | } | |
780 | ||
a49c3c77 TM |
781 | void put_nfs_open_context(struct nfs_open_context *ctx) |
782 | { | |
783 | __put_nfs_open_context(ctx, 0); | |
784 | } | |
89d77c8f | 785 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 786 | |
1da177e4 LT |
787 | /* |
788 | * Ensure that mmap has a recent RPC credential for use when writing out | |
789 | * shared pages | |
790 | */ | |
c45ffdd2 | 791 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 792 | { |
c45ffdd2 | 793 | struct inode *inode = ctx->dentry->d_inode; |
1da177e4 LT |
794 | struct nfs_inode *nfsi = NFS_I(inode); |
795 | ||
1da177e4 LT |
796 | spin_lock(&inode->i_lock); |
797 | list_add(&ctx->list, &nfsi->open_files); | |
798 | spin_unlock(&inode->i_lock); | |
799 | } | |
c45ffdd2 TM |
800 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
801 | ||
802 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
803 | { | |
804 | filp->private_data = get_nfs_open_context(ctx); | |
805 | if (list_empty(&ctx->list)) | |
806 | nfs_inode_attach_open_context(ctx); | |
807 | } | |
89d77c8f | 808 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 809 | |
d530838b TM |
810 | /* |
811 | * Given an inode, search for an open context with the desired characteristics | |
812 | */ | |
dc0b027d | 813 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
814 | { |
815 | struct nfs_inode *nfsi = NFS_I(inode); | |
816 | struct nfs_open_context *pos, *ctx = NULL; | |
817 | ||
818 | spin_lock(&inode->i_lock); | |
819 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
820 | if (cred != NULL && pos->cred != cred) |
821 | continue; | |
1544fa0f TM |
822 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
823 | continue; | |
824 | ctx = get_nfs_open_context(pos); | |
825 | break; | |
1da177e4 LT |
826 | } |
827 | spin_unlock(&inode->i_lock); | |
828 | return ctx; | |
829 | } | |
830 | ||
b92dccf6 | 831 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 832 | { |
cd3758e3 | 833 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
834 | |
835 | if (ctx) { | |
c45ffdd2 TM |
836 | struct inode *inode = ctx->dentry->d_inode; |
837 | ||
1da177e4 LT |
838 | filp->private_data = NULL; |
839 | spin_lock(&inode->i_lock); | |
840 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
841 | spin_unlock(&inode->i_lock); | |
f895c53f | 842 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
843 | } |
844 | } | |
845 | ||
846 | /* | |
847 | * These allocate and release file read/write context information. | |
848 | */ | |
849 | int nfs_open(struct inode *inode, struct file *filp) | |
850 | { | |
851 | struct nfs_open_context *ctx; | |
1da177e4 | 852 | |
5ede7b1c AV |
853 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
854 | if (IS_ERR(ctx)) | |
855 | return PTR_ERR(ctx); | |
1da177e4 LT |
856 | nfs_file_set_open_context(filp, ctx); |
857 | put_nfs_open_context(ctx); | |
f1fe29b4 | 858 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
859 | return 0; |
860 | } | |
861 | ||
862 | int nfs_release(struct inode *inode, struct file *filp) | |
863 | { | |
1da177e4 LT |
864 | nfs_file_clear_open_context(filp); |
865 | return 0; | |
866 | } | |
867 | ||
868 | /* | |
869 | * This function is called whenever some part of NFS notices that | |
870 | * the cached attributes have to be refreshed. | |
871 | */ | |
872 | int | |
873 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
874 | { | |
875 | int status = -ESTALE; | |
1775fd3e | 876 | struct nfs4_label *label = NULL; |
a3cba2aa | 877 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 878 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 879 | |
1e8968c5 NV |
880 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
881 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 882 | |
f4ce1299 TM |
883 | trace_nfs_revalidate_inode_enter(inode); |
884 | ||
85233a7a | 885 | if (is_bad_inode(inode)) |
691beb13 | 886 | goto out; |
1da177e4 | 887 | if (NFS_STALE(inode)) |
412d582e | 888 | goto out; |
7fdc49c4 | 889 | |
a3cba2aa TM |
890 | status = -ENOMEM; |
891 | fattr = nfs_alloc_fattr(); | |
892 | if (fattr == NULL) | |
893 | goto out; | |
894 | ||
691beb13 | 895 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
896 | |
897 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
898 | if (IS_ERR(label)) { | |
899 | status = PTR_ERR(label); | |
900 | goto out; | |
901 | } | |
902 | ||
1775fd3e | 903 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 | 904 | if (status != 0) { |
1e8968c5 | 905 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 906 | inode->i_sb->s_id, |
1e8968c5 | 907 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
908 | if (status == -ESTALE) { |
909 | nfs_zap_caches(inode); | |
910 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 911 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 912 | } |
14c43f76 | 913 | goto err_out; |
1da177e4 LT |
914 | } |
915 | ||
a3cba2aa | 916 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 917 | if (status) { |
1e8968c5 | 918 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 919 | inode->i_sb->s_id, |
1e8968c5 | 920 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 921 | goto err_out; |
1da177e4 | 922 | } |
55296809 | 923 | |
24aa1fe6 | 924 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 925 | nfs_zap_acl_cache(inode); |
55296809 | 926 | |
3da580aa JL |
927 | nfs_setsecurity(inode, fattr, label); |
928 | ||
1e8968c5 | 929 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 930 | inode->i_sb->s_id, |
1e8968c5 | 931 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 932 | |
14c43f76 DQ |
933 | err_out: |
934 | nfs4_label_free(label); | |
935 | out: | |
a3cba2aa | 936 | nfs_free_fattr(fattr); |
f4ce1299 | 937 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
938 | return status; |
939 | } | |
940 | ||
941 | int nfs_attribute_timeout(struct inode *inode) | |
942 | { | |
943 | struct nfs_inode *nfsi = NFS_I(inode); | |
944 | ||
d7cf8dd0 TM |
945 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
946 | } | |
947 | ||
43f291cd | 948 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 949 | { |
b4d2314b | 950 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 951 | return 0; |
d7cf8dd0 | 952 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
953 | } |
954 | ||
955 | /** | |
956 | * nfs_revalidate_inode - Revalidate the inode attributes | |
957 | * @server - pointer to nfs_server struct | |
958 | * @inode - pointer to inode struct | |
959 | * | |
960 | * Updates inode attribute information by retrieving the data from the server. | |
961 | */ | |
962 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
963 | { | |
aa9c2669 DQ |
964 | if (!(NFS_I(inode)->cache_validity & |
965 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
d7cf8dd0 | 966 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
967 | return NFS_STALE(inode) ? -ESTALE : 0; |
968 | return __nfs_revalidate_inode(server, inode); | |
969 | } | |
1c606fb7 | 970 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 971 | |
1cda707d | 972 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
973 | { |
974 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
975 | int ret; |
976 | ||
717d44e8 | 977 | if (mapping->nrpages != 0) { |
f8806c84 TM |
978 | if (S_ISREG(inode->i_mode)) { |
979 | ret = nfs_sync_mapping(mapping); | |
980 | if (ret < 0) | |
981 | return ret; | |
982 | } | |
983 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
984 | if (ret < 0) |
985 | return ret; | |
986 | } | |
d529ef83 JL |
987 | if (S_ISDIR(inode->i_mode)) { |
988 | spin_lock(&inode->i_lock); | |
717d44e8 | 989 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
990 | spin_unlock(&inode->i_lock); |
991 | } | |
717d44e8 | 992 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 993 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 994 | |
1e8968c5 NV |
995 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
996 | inode->i_sb->s_id, | |
997 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
998 | return 0; |
999 | } | |
1000 | ||
b4b1eadf TM |
1001 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
1002 | { | |
1003 | if (nfs_have_delegated_attributes(inode)) | |
1004 | return false; | |
1005 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
1006 | || nfs_attribute_timeout(inode) | |
1007 | || NFS_STALE(inode); | |
1008 | } | |
1009 | ||
717d44e8 TM |
1010 | /** |
1011 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1012 | * @inode - pointer to host inode | |
1013 | * @mapping - pointer to mapping | |
717d44e8 TM |
1014 | */ |
1015 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1016 | { | |
1017 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1018 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1019 | int ret = 0; |
dc59250c | 1020 | |
29418aa4 MG |
1021 | /* swapfiles are not supposed to be shared. */ |
1022 | if (IS_SWAPFILE(inode)) | |
1023 | goto out; | |
1024 | ||
b4b1eadf | 1025 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1026 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1027 | if (ret < 0) | |
1028 | goto out; | |
7d52e862 | 1029 | } |
d529ef83 JL |
1030 | |
1031 | /* | |
1032 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1033 | * invalidations that come in while we're shooting down the mappings | |
1034 | * are respected. But, that leaves a race window where one revalidator | |
1035 | * can clear the flag, and then another checks it before the mapping | |
1036 | * gets invalidated. Fix that by serializing access to this part of | |
1037 | * the function. | |
1038 | * | |
1039 | * At the same time, we need to allow other tasks to see whether we | |
1040 | * might be in the middle of invalidating the pages, so we only set | |
1041 | * the bit lock here if it looks like we're going to be doing that. | |
1042 | */ | |
1043 | for (;;) { | |
1044 | ret = wait_on_bit(bitlock, NFS_INO_INVALIDATING, | |
1045 | nfs_wait_bit_killable, TASK_KILLABLE); | |
1046 | if (ret) | |
1047 | goto out; | |
17dfeb91 TM |
1048 | spin_lock(&inode->i_lock); |
1049 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1050 | spin_unlock(&inode->i_lock); | |
1051 | continue; | |
1052 | } | |
1053 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1054 | break; |
d529ef83 | 1055 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1056 | goto out; |
f4ce1299 TM |
1057 | } |
1058 | ||
17dfeb91 | 1059 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1060 | smp_wmb(); |
17dfeb91 TM |
1061 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1062 | spin_unlock(&inode->i_lock); | |
1063 | trace_nfs_invalidate_mapping_enter(inode); | |
1064 | ret = nfs_invalidate_mapping(inode, mapping); | |
1065 | trace_nfs_invalidate_mapping_exit(inode, ret); | |
1066 | ||
d529ef83 JL |
1067 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
1068 | smp_mb__after_clear_bit(); | |
1069 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); | |
cd9ae2b6 | 1070 | out: |
44b11874 | 1071 | return ret; |
7d52e862 TM |
1072 | } |
1073 | ||
27dc1cd3 | 1074 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1075 | { |
1076 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1077 | unsigned long ret = 0; |
a895b4a1 | 1078 | |
9e6e70f8 TM |
1079 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1080 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1081 | && inode->i_version == fattr->pre_change_attr) { |
1082 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
1083 | if (S_ISDIR(inode->i_mode)) |
1084 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 1085 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1086 | } |
a895b4a1 | 1087 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1088 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1089 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1090 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1091 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1092 | ret |= NFS_INO_INVALID_ATTR; | |
1093 | } | |
9e6e70f8 TM |
1094 | |
1095 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1096 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1097 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1098 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1099 | if (S_ISDIR(inode->i_mode)) | |
1100 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1101 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 1102 | } |
9e6e70f8 TM |
1103 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1104 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1105 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
1106 | && nfsi->npages == 0) { |
1107 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
1108 | ret |= NFS_INO_INVALID_ATTR; | |
1109 | } | |
de242c0b DH |
1110 | |
1111 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
1112 | nfs_fscache_invalidate(inode); | |
1113 | ||
27dc1cd3 | 1114 | return ret; |
a895b4a1 TM |
1115 | } |
1116 | ||
1da177e4 | 1117 | /** |
33801147 | 1118 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1119 | * @inode - pointer to inode |
1120 | * @fattr - updated attributes | |
1121 | * | |
1122 | * Verifies the attribute cache. If we have just changed the attributes, | |
1123 | * so that fattr carries weak cache consistency data, then it may | |
1124 | * also update the ctime/mtime/change_attribute. | |
1125 | */ | |
33801147 | 1126 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1127 | { |
1128 | struct nfs_inode *nfsi = NFS_I(inode); | |
1129 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1130 | unsigned long invalid = 0; |
1da177e4 | 1131 | |
dc59250c | 1132 | |
01da47bd TM |
1133 | if (nfs_have_delegated_attributes(inode)) |
1134 | return 0; | |
ca62b9c3 | 1135 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1136 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1137 | return -EIO; | |
1138 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1139 | return -EIO; |
ca62b9c3 | 1140 | |
9e6e70f8 | 1141 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 1142 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 1143 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1144 | |
1da177e4 | 1145 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1146 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1147 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1148 | |
9e6e70f8 TM |
1149 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1150 | cur_size = i_size_read(inode); | |
1151 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1152 | if (cur_size != new_isize && nfsi->npages == 0) | |
1153 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1154 | } | |
1da177e4 LT |
1155 | |
1156 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1157 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1158 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1159 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1160 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1161 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1162 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1163 | |
1164 | /* Has the link count changed? */ | |
9e6e70f8 | 1165 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1166 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1167 | |
9e6e70f8 | 1168 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1169 | invalid |= NFS_INO_INVALID_ATIME; |
1170 | ||
1171 | if (invalid != 0) | |
1172 | nfsi->cache_validity |= invalid; | |
1da177e4 | 1173 | |
33801147 | 1174 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1175 | return 0; |
1176 | } | |
1177 | ||
a10ad176 | 1178 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1179 | { |
9e6e70f8 TM |
1180 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1181 | return 0; | |
a10ad176 TM |
1182 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1183 | } | |
1184 | ||
1185 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1186 | { | |
9e6e70f8 TM |
1187 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1188 | return 0; | |
a10ad176 TM |
1189 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1190 | } | |
870a5be8 | 1191 | |
ae05f269 | 1192 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1193 | |
1194 | static unsigned long nfs_read_attr_generation_counter(void) | |
1195 | { | |
ae05f269 | 1196 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1197 | } |
1198 | ||
1199 | unsigned long nfs_inc_attr_generation_counter(void) | |
1200 | { | |
ae05f269 | 1201 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1202 | } |
1203 | ||
1204 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1205 | { | |
1206 | fattr->valid = 0; | |
1207 | fattr->time_start = jiffies; | |
1208 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1209 | fattr->owner_name = NULL; |
1210 | fattr->group_name = NULL; | |
4704f0e2 | 1211 | } |
ddda8e0a | 1212 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1213 | |
2d36bfde TM |
1214 | struct nfs_fattr *nfs_alloc_fattr(void) |
1215 | { | |
1216 | struct nfs_fattr *fattr; | |
1217 | ||
1218 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1219 | if (fattr != NULL) | |
1220 | nfs_fattr_init(fattr); | |
1221 | return fattr; | |
1222 | } | |
ddda8e0a | 1223 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1224 | |
1225 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1226 | { | |
1227 | struct nfs_fh *fh; | |
1228 | ||
1229 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1230 | if (fh != NULL) | |
1231 | fh->size = 0; | |
1232 | return fh; | |
1233 | } | |
ddda8e0a | 1234 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1235 | |
e27d359e | 1236 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1237 | /* |
1238 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1239 | * in the same way that wireshark does | |
1240 | * | |
1241 | * @fh: file handle | |
1242 | * | |
1243 | * For debugging only. | |
1244 | */ | |
1245 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1246 | { | |
1247 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1248 | * not on the result */ | |
1264a2f0 | 1249 | return nfs_fhandle_hash(fh); |
d8e0539e | 1250 | } |
9e6ee76d | 1251 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1252 | |
1253 | /* | |
20d27e92 CL |
1254 | * _nfs_display_fhandle - display an NFS file handle on the console |
1255 | * | |
1256 | * @fh: file handle to display | |
1257 | * @caption: display caption | |
1258 | * | |
1259 | * For debugging only. | |
1260 | */ | |
20d27e92 CL |
1261 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1262 | { | |
1263 | unsigned short i; | |
1264 | ||
fa68a1ba | 1265 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1266 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1267 | return; | |
1268 | } | |
1269 | ||
d8e0539e WAA |
1270 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1271 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1272 | for (i = 0; i < fh->size; i += 16) { |
1273 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1274 | ||
1275 | switch ((fh->size - i - 1) >> 2) { | |
1276 | case 0: | |
1277 | printk(KERN_DEFAULT " %08x\n", | |
1278 | be32_to_cpup(pos)); | |
1279 | break; | |
1280 | case 1: | |
1281 | printk(KERN_DEFAULT " %08x %08x\n", | |
1282 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1283 | break; | |
1284 | case 2: | |
1285 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1286 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1287 | be32_to_cpup(pos + 2)); | |
1288 | break; | |
1289 | default: | |
1290 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1291 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1292 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1293 | } | |
1294 | } | |
1295 | } | |
9e6ee76d | 1296 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1297 | #endif |
1298 | ||
a10ad176 TM |
1299 | /** |
1300 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1301 | * @inode - pointer to inode | |
1302 | * @fattr - attributes | |
1303 | * | |
1304 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1305 | * attributes got scheduled after another call carrying updated ones. | |
1306 | * | |
1307 | * To do so, the function first assumes that a more recent ctime means | |
1308 | * that the attributes in fattr are newer, however it also attempt to | |
1309 | * catch the case where ctime either didn't change, or went backwards | |
1310 | * (if someone reset the clock on the server) by looking at whether | |
1311 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1312 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1313 | * |
1314 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1315 | * more recent than the ones cached in the inode. | |
1316 | * | |
1317 | */ | |
1318 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1319 | { | |
1320 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1321 | ||
4704f0e2 | 1322 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1323 | nfs_ctime_need_update(inode, fattr) || |
1324 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1325 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1326 | } |
1327 | ||
d8c951c3 TM |
1328 | /* |
1329 | * Don't trust the change_attribute, mtime, ctime or size if | |
1330 | * a pnfs LAYOUTCOMMIT is outstanding | |
1331 | */ | |
1332 | static void nfs_inode_attrs_handle_layoutcommit(struct inode *inode, | |
1333 | struct nfs_fattr *fattr) | |
1334 | { | |
1335 | if (pnfs_layoutcommit_outstanding(inode)) | |
1336 | fattr->valid &= ~(NFS_ATTR_FATTR_CHANGE | | |
1337 | NFS_ATTR_FATTR_MTIME | | |
1338 | NFS_ATTR_FATTR_CTIME | | |
1339 | NFS_ATTR_FATTR_SIZE); | |
1340 | } | |
1341 | ||
a10ad176 TM |
1342 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1343 | { | |
f4ce1299 TM |
1344 | int ret; |
1345 | ||
1346 | trace_nfs_refresh_inode_enter(inode); | |
1347 | ||
d8c951c3 TM |
1348 | nfs_inode_attrs_handle_layoutcommit(inode, fattr); |
1349 | ||
a10ad176 | 1350 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1351 | ret = nfs_update_inode(inode, fattr); |
1352 | else | |
1353 | ret = nfs_check_inode_attributes(inode, fattr); | |
1354 | ||
1355 | trace_nfs_refresh_inode_exit(inode, ret); | |
1356 | return ret; | |
870a5be8 TM |
1357 | } |
1358 | ||
33801147 TM |
1359 | /** |
1360 | * nfs_refresh_inode - try to update the inode attribute cache | |
1361 | * @inode - pointer to inode | |
1362 | * @fattr - updated attributes | |
1363 | * | |
1364 | * Check that an RPC call that returned attributes has not overlapped with | |
1365 | * other recent updates of the inode metadata, then decide whether it is | |
1366 | * safe to do a full update of the inode attributes, or whether just to | |
1367 | * call nfs_check_inode_attributes. | |
1368 | */ | |
1369 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1370 | { | |
33801147 TM |
1371 | int status; |
1372 | ||
1373 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1374 | return 0; | |
1375 | spin_lock(&inode->i_lock); | |
870a5be8 | 1376 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1377 | spin_unlock(&inode->i_lock); |
ef79c097 | 1378 | |
33801147 TM |
1379 | return status; |
1380 | } | |
ddda8e0a | 1381 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1382 | |
d65f557f TM |
1383 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1384 | { | |
1385 | struct nfs_inode *nfsi = NFS_I(inode); | |
1386 | ||
1387 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
de242c0b | 1388 | if (S_ISDIR(inode->i_mode)) { |
d65f557f | 1389 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
de242c0b DH |
1390 | nfs_fscache_invalidate(inode); |
1391 | } | |
d65f557f TM |
1392 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1393 | return 0; | |
1394 | return nfs_refresh_inode_locked(inode, fattr); | |
1395 | } | |
1396 | ||
decf491f TM |
1397 | /** |
1398 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1399 | * @inode - pointer to inode | |
1400 | * @fattr - updated attributes | |
1401 | * | |
1402 | * After an operation that has changed the inode metadata, mark the | |
1403 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1404 | * |
1405 | * NB: if the server didn't return any post op attributes, this | |
1406 | * function will force the retrieval of attributes before the next | |
1407 | * NFS request. Thus it should be used only for operations that | |
1408 | * are expected to change one or more attributes, to avoid | |
1409 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1410 | */ |
1411 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1412 | { | |
d65f557f | 1413 | int status; |
decf491f | 1414 | |
7668fdbe | 1415 | spin_lock(&inode->i_lock); |
d65f557f | 1416 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1417 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1418 | |
870a5be8 | 1419 | return status; |
decf491f | 1420 | } |
1c606fb7 | 1421 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1422 | |
70ca8852 TM |
1423 | /** |
1424 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1425 | * @inode - pointer to inode | |
1426 | * @fattr - updated attributes | |
1427 | * | |
1428 | * After an operation that has changed the inode metadata, mark the | |
1429 | * attribute cache as being invalid, then try to update it. Fake up | |
1430 | * weak cache consistency data, if none exist. | |
1431 | * | |
1432 | * This function is mainly designed to be used by the ->write_done() functions. | |
1433 | */ | |
1434 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1435 | { | |
d65f557f TM |
1436 | int status; |
1437 | ||
1438 | spin_lock(&inode->i_lock); | |
1439 | /* Don't do a WCC update if these attributes are already stale */ | |
1440 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1441 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1442 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1443 | | NFS_ATTR_FATTR_PRESIZE | |
1444 | | NFS_ATTR_FATTR_PREMTIME | |
1445 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1446 | goto out_noforce; |
1447 | } | |
9e6e70f8 TM |
1448 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1449 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1450 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1451 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1452 | } |
9e6e70f8 TM |
1453 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1454 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1455 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1456 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1457 | } | |
1458 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1459 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1460 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1461 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1462 | } | |
1463 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1464 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1465 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1466 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1467 | } |
d65f557f TM |
1468 | out_noforce: |
1469 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1470 | spin_unlock(&inode->i_lock); | |
1471 | return status; | |
70ca8852 | 1472 | } |
ddda8e0a | 1473 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1474 | |
1da177e4 LT |
1475 | /* |
1476 | * Many nfs protocol calls return the new file attributes after | |
1477 | * an operation. Here we update the inode to reflect the state | |
1478 | * of the server's inode. | |
1479 | * | |
1480 | * This is a bit tricky because we have to make sure all dirty pages | |
1481 | * have been sent off to the server before calling invalidate_inode_pages. | |
1482 | * To make sure no other process adds more write requests while we try | |
1483 | * our best to flush them, we make them sleep during the attribute refresh. | |
1484 | * | |
1485 | * A very similar scenario holds for the dir cache. | |
1486 | */ | |
24aa1fe6 | 1487 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1488 | { |
8b4bdcf8 | 1489 | struct nfs_server *server; |
1da177e4 | 1490 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1491 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1492 | unsigned long invalid = 0; |
3e7d950a | 1493 | unsigned long now = jiffies; |
62ab460c | 1494 | unsigned long save_cache_validity; |
1da177e4 | 1495 | |
1e8968c5 | 1496 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1497 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1498 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1499 | atomic_read(&inode->i_count), fattr->valid); |
1500 | ||
e73e6c9e MT |
1501 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1502 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1503 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1504 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1505 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1506 | (long long)fattr->fileid); | |
1507 | goto out_err; | |
1508 | } | |
1da177e4 LT |
1509 | |
1510 | /* | |
1511 | * Make sure the inode's type hasn't changed. | |
1512 | */ | |
e73e6c9e MT |
1513 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1514 | /* | |
1515 | * Big trouble! The inode has become a different object. | |
1516 | */ | |
1e8968c5 | 1517 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1518 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1519 | goto out_err; | |
1520 | } | |
1da177e4 | 1521 | |
8b4bdcf8 | 1522 | server = NFS_SERVER(inode); |
a0356862 | 1523 | /* Update the fsid? */ |
9e6e70f8 | 1524 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1525 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1526 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1527 | server->fsid = fattr->fsid; |
1528 | ||
1da177e4 LT |
1529 | /* |
1530 | * Update the read time so we don't revalidate too often. | |
1531 | */ | |
33801147 | 1532 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1533 | |
62ab460c TM |
1534 | save_cache_validity = nfsi->cache_validity; |
1535 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1536 | | NFS_INO_INVALID_ATIME | |
1537 | | NFS_INO_REVAL_FORCED | |
1538 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1539 | |
a895b4a1 | 1540 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1541 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1542 | |
47aabaa7 | 1543 | /* More cache consistency checks */ |
9e6e70f8 | 1544 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1545 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1546 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1547 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1548 | invalid |= NFS_INO_INVALID_ATTR |
1549 | | NFS_INO_INVALID_DATA | |
1550 | | NFS_INO_INVALID_ACCESS | |
1551 | | NFS_INO_INVALID_ACL | |
1552 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1553 | if (S_ISDIR(inode->i_mode)) |
1554 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1555 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1556 | } |
62ab460c TM |
1557 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1558 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1559 | |
1560 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1561 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c TM |
1562 | } else if (server->caps & NFS_CAP_MTIME) |
1563 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1564 | | NFS_INO_REVAL_FORCED); |
1565 | ||
9e6e70f8 | 1566 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1567 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c TM |
1568 | } else if (server->caps & NFS_CAP_CTIME) |
1569 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c | 1570 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1571 | |
951a143b | 1572 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1573 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1574 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1575 | cur_isize = i_size_read(inode); | |
1576 | if (new_isize != cur_isize) { | |
1577 | /* Do we perhaps have any outstanding writes, or has | |
1578 | * the file grown beyond our last write? */ | |
d8c951c3 | 1579 | if ((nfsi->npages == 0) || new_isize > cur_isize) { |
9e6e70f8 TM |
1580 | i_size_write(inode, new_isize); |
1581 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1582 | } | |
60c16ea8 HJ |
1583 | dprintk("NFS: isize change on server for file %s/%ld " |
1584 | "(%Ld to %Ld)\n", | |
1585 | inode->i_sb->s_id, | |
1586 | inode->i_ino, | |
1587 | (long long)cur_isize, | |
1588 | (long long)new_isize); | |
1da177e4 | 1589 | } |
62ab460c TM |
1590 | } else |
1591 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1592 | | NFS_INO_REVAL_PAGECACHE | |
1593 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1594 | |
1da177e4 | 1595 | |
9e6e70f8 TM |
1596 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1597 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1598 | else if (server->caps & NFS_CAP_ATIME) |
1599 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1600 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1601 | |
9e6e70f8 TM |
1602 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1603 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1604 | umode_t newmode = inode->i_mode & S_IFMT; |
1605 | newmode |= fattr->mode & S_IALLUGO; | |
1606 | inode->i_mode = newmode; | |
9e6e70f8 | 1607 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1608 | } |
62ab460c TM |
1609 | } else if (server->caps & NFS_CAP_MODE) |
1610 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1611 | | NFS_INO_INVALID_ACCESS | |
1612 | | NFS_INO_INVALID_ACL | |
1613 | | NFS_INO_REVAL_FORCED); | |
1614 | ||
9e6e70f8 | 1615 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1616 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1617 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1618 | inode->i_uid = fattr->uid; | |
1619 | } | |
62ab460c TM |
1620 | } else if (server->caps & NFS_CAP_OWNER) |
1621 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1622 | | NFS_INO_INVALID_ACCESS | |
1623 | | NFS_INO_INVALID_ACL | |
1624 | | NFS_INO_REVAL_FORCED); | |
1625 | ||
9e6e70f8 | 1626 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1627 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1628 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1629 | inode->i_gid = fattr->gid; | |
1630 | } | |
62ab460c TM |
1631 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1632 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1633 | | NFS_INO_INVALID_ACCESS | |
1634 | | NFS_INO_INVALID_ACL | |
1635 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1636 | |
9e6e70f8 TM |
1637 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1638 | if (inode->i_nlink != fattr->nlink) { | |
1639 | invalid |= NFS_INO_INVALID_ATTR; | |
1640 | if (S_ISDIR(inode->i_mode)) | |
1641 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1642 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1643 | } |
62ab460c TM |
1644 | } else if (server->caps & NFS_CAP_NLINK) |
1645 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1646 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1647 | |
9e6e70f8 | 1648 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1649 | /* |
1650 | * report the blocks in 512byte units | |
1651 | */ | |
1652 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1653 | } |
9e6e70f8 TM |
1654 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1655 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1656 | |
1657 | /* Update attrtimeo value if we're out of the unstable period */ | |
fd1defc2 | 1658 | if (invalid & NFS_INO_INVALID_ATTR) { |
91d5b470 | 1659 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1660 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1661 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1662 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1663 | } else { |
64672d55 | 1664 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1665 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1666 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1667 | nfsi->attrtimeo_timestamp = now; | |
1668 | } | |
1da177e4 | 1669 | } |
f2115dc9 | 1670 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1671 | /* Don't invalidate the data if we were to blame */ |
1672 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1673 | || S_ISLNK(inode->i_mode))) | |
1674 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1675 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1676 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1677 | nfsi->cache_validity |= invalid; |
1da177e4 | 1678 | |
de242c0b DH |
1679 | if (invalid & NFS_INO_INVALID_DATA) |
1680 | nfs_fscache_invalidate(inode); | |
1681 | ||
1da177e4 | 1682 | return 0; |
b37b03b7 | 1683 | out_err: |
1da177e4 LT |
1684 | /* |
1685 | * No need to worry about unhashing the dentry, as the | |
1686 | * lookup validation will know that the inode is bad. | |
1687 | * (But we fall through to invalidate the caches.) | |
1688 | */ | |
1689 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1690 | return -ESTALE; |
1691 | } | |
1692 | ||
f7b422b1 | 1693 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1694 | { |
1695 | struct nfs_inode *nfsi; | |
e94b1766 | 1696 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1697 | if (!nfsi) |
1698 | return NULL; | |
55296809 CL |
1699 | nfsi->flags = 0UL; |
1700 | nfsi->cache_validity = 0UL; | |
89d77c8f | 1701 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1702 | nfsi->nfs4_acl = NULL; |
1703 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1704 | return &nfsi->vfs_inode; |
1705 | } | |
89d77c8f | 1706 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1707 | |
fa0d7e3d | 1708 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1709 | { |
fa0d7e3d | 1710 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1711 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1712 | } | |
1713 | ||
fa0d7e3d NP |
1714 | void nfs_destroy_inode(struct inode *inode) |
1715 | { | |
1716 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1717 | } | |
89d77c8f | 1718 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1719 | |
d75d5414 AM |
1720 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1721 | { | |
89d77c8f | 1722 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1723 | INIT_LIST_HEAD(&nfsi->open_states); |
1724 | nfsi->delegation = NULL; | |
1725 | nfsi->delegation_state = 0; | |
1726 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1727 | nfsi->layout = NULL; |
d75d5414 AM |
1728 | #endif |
1729 | } | |
f7b422b1 | 1730 | |
51cc5068 | 1731 | static void init_once(void *foo) |
1da177e4 LT |
1732 | { |
1733 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1734 | ||
a35afb83 | 1735 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1736 | INIT_LIST_HEAD(&nfsi->open_files); |
1737 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1738 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1739 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1740 | nfsi->npages = 0; |
ea2cf228 | 1741 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1742 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1743 | atomic_set(&nfsi->silly_count, 1); |
1744 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1745 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1746 | nfs4_init_once(nfsi); |
1da177e4 | 1747 | } |
20c2df83 | 1748 | |
f7b422b1 | 1749 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1750 | { |
1751 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1752 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1753 | 0, (SLAB_RECLAIM_ACCOUNT| |
1754 | SLAB_MEM_SPREAD), | |
20c2df83 | 1755 | init_once); |
1da177e4 LT |
1756 | if (nfs_inode_cachep == NULL) |
1757 | return -ENOMEM; | |
1758 | ||
1759 | return 0; | |
1760 | } | |
1761 | ||
266bee88 | 1762 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1763 | { |
8c0a8537 KS |
1764 | /* |
1765 | * Make sure all delayed rcu free inodes are flushed before we | |
1766 | * destroy cache. | |
1767 | */ | |
1768 | rcu_barrier(); | |
1a1d92c1 | 1769 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1770 | } |
1771 | ||
5746006f | 1772 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1773 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1774 | |
1775 | /* | |
1776 | * start up the nfsiod workqueue | |
1777 | */ | |
1778 | static int nfsiod_start(void) | |
1779 | { | |
1780 | struct workqueue_struct *wq; | |
1781 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1782 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1783 | if (wq == NULL) |
1784 | return -ENOMEM; | |
1785 | nfsiod_workqueue = wq; | |
1786 | return 0; | |
1787 | } | |
1788 | ||
1789 | /* | |
1790 | * Destroy the nfsiod workqueue | |
1791 | */ | |
1792 | static void nfsiod_stop(void) | |
1793 | { | |
1794 | struct workqueue_struct *wq; | |
1795 | ||
1796 | wq = nfsiod_workqueue; | |
1797 | if (wq == NULL) | |
1798 | return; | |
1799 | nfsiod_workqueue = NULL; | |
1800 | destroy_workqueue(wq); | |
1801 | } | |
1802 | ||
1b340d01 | 1803 | int nfs_net_id; |
9e2e74db | 1804 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1805 | |
1806 | static int nfs_net_init(struct net *net) | |
1807 | { | |
6b13168b | 1808 | nfs_clients_init(net); |
c8d74d9b | 1809 | return 0; |
1b340d01 SK |
1810 | } |
1811 | ||
1812 | static void nfs_net_exit(struct net *net) | |
1813 | { | |
28cd1b3f | 1814 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1815 | } |
1816 | ||
1817 | static struct pernet_operations nfs_net_ops = { | |
1818 | .init = nfs_net_init, | |
1819 | .exit = nfs_net_exit, | |
1820 | .id = &nfs_net_id, | |
1821 | .size = sizeof(struct nfs_net), | |
1822 | }; | |
1823 | ||
1da177e4 LT |
1824 | /* |
1825 | * Initialize NFS | |
1826 | */ | |
1827 | static int __init init_nfs_fs(void) | |
1828 | { | |
1829 | int err; | |
1830 | ||
1b340d01 | 1831 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1832 | if (err < 0) |
89d77c8f | 1833 | goto out9; |
e571cbf1 | 1834 | |
8ec442ae DH |
1835 | err = nfs_fscache_register(); |
1836 | if (err < 0) | |
89d77c8f | 1837 | goto out8; |
8ec442ae | 1838 | |
5746006f TM |
1839 | err = nfsiod_start(); |
1840 | if (err) | |
89d77c8f | 1841 | goto out7; |
5746006f | 1842 | |
6aaca566 DH |
1843 | err = nfs_fs_proc_init(); |
1844 | if (err) | |
89d77c8f | 1845 | goto out6; |
6aaca566 | 1846 | |
1da177e4 LT |
1847 | err = nfs_init_nfspagecache(); |
1848 | if (err) | |
89d77c8f | 1849 | goto out5; |
1da177e4 LT |
1850 | |
1851 | err = nfs_init_inodecache(); | |
1852 | if (err) | |
89d77c8f | 1853 | goto out4; |
1da177e4 LT |
1854 | |
1855 | err = nfs_init_readpagecache(); | |
1856 | if (err) | |
89d77c8f | 1857 | goto out3; |
1da177e4 LT |
1858 | |
1859 | err = nfs_init_writepagecache(); | |
1860 | if (err) | |
89d77c8f | 1861 | goto out2; |
1da177e4 | 1862 | |
1da177e4 LT |
1863 | err = nfs_init_directcache(); |
1864 | if (err) | |
89d77c8f | 1865 | goto out1; |
1da177e4 LT |
1866 | |
1867 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1868 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1869 | #endif |
f7b422b1 | 1870 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1871 | goto out0; |
1872 | ||
1da177e4 | 1873 | return 0; |
129d1977 | 1874 | out0: |
1da177e4 | 1875 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1876 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1877 | #endif |
1da177e4 | 1878 | nfs_destroy_directcache(); |
89d77c8f | 1879 | out1: |
129d1977 | 1880 | nfs_destroy_writepagecache(); |
89d77c8f | 1881 | out2: |
129d1977 | 1882 | nfs_destroy_readpagecache(); |
89d77c8f | 1883 | out3: |
129d1977 | 1884 | nfs_destroy_inodecache(); |
89d77c8f | 1885 | out4: |
129d1977 | 1886 | nfs_destroy_nfspagecache(); |
89d77c8f | 1887 | out5: |
129d1977 | 1888 | nfs_fs_proc_exit(); |
89d77c8f | 1889 | out6: |
129d1977 | 1890 | nfsiod_stop(); |
89d77c8f | 1891 | out7: |
129d1977 | 1892 | nfs_fscache_unregister(); |
89d77c8f | 1893 | out8: |
129d1977 | 1894 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 1895 | out9: |
1da177e4 LT |
1896 | return err; |
1897 | } | |
1898 | ||
1899 | static void __exit exit_nfs_fs(void) | |
1900 | { | |
1da177e4 | 1901 | nfs_destroy_directcache(); |
1da177e4 LT |
1902 | nfs_destroy_writepagecache(); |
1903 | nfs_destroy_readpagecache(); | |
1904 | nfs_destroy_inodecache(); | |
1905 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1906 | nfs_fscache_unregister(); |
1b340d01 | 1907 | unregister_pernet_subsys(&nfs_net_ops); |
1da177e4 | 1908 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1909 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1910 | #endif |
f7b422b1 | 1911 | unregister_nfs_fs(); |
6aaca566 | 1912 | nfs_fs_proc_exit(); |
5746006f | 1913 | nfsiod_stop(); |
1da177e4 LT |
1914 | } |
1915 | ||
1916 | /* Not quite true; I just maintain it */ | |
1917 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1918 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1919 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1920 | |
1921 | module_init(init_nfs_fs) | |
1922 | module_exit(exit_nfs_fs) |