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> | |
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 | { | |
91b0abe3 | 131 | truncate_inode_pages_final(&inode->i_data); |
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 | ||
6edf9609 TM |
150 | static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags) |
151 | { | |
152 | struct nfs_inode *nfsi = NFS_I(inode); | |
153 | ||
154 | if (inode->i_mapping->nrpages == 0) | |
155 | flags &= ~NFS_INO_INVALID_DATA; | |
156 | nfsi->cache_validity |= flags; | |
157 | if (flags & NFS_INO_INVALID_DATA) | |
158 | nfs_fscache_invalidate(inode); | |
159 | } | |
160 | ||
1da177e4 LT |
161 | /* |
162 | * Invalidate the local caches | |
163 | */ | |
b37b03b7 | 164 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
165 | { |
166 | struct nfs_inode *nfsi = NFS_I(inode); | |
167 | int mode = inode->i_mode; | |
168 | ||
91d5b470 CL |
169 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
170 | ||
c7c20973 TM |
171 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
172 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 173 | |
c3f52af3 | 174 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
de242c0b | 175 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
6edf9609 | 176 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
177 | | NFS_INO_INVALID_DATA |
178 | | NFS_INO_INVALID_ACCESS | |
179 | | NFS_INO_INVALID_ACL | |
6edf9609 | 180 | | NFS_INO_REVAL_PAGECACHE); |
aa9c2669 | 181 | } else |
6edf9609 | 182 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
183 | | NFS_INO_INVALID_ACCESS |
184 | | NFS_INO_INVALID_ACL | |
6edf9609 | 185 | | NFS_INO_REVAL_PAGECACHE); |
fd1defc2 | 186 | nfs_zap_label_cache_locked(nfsi); |
b37b03b7 | 187 | } |
dc59250c | 188 | |
b37b03b7 TM |
189 | void nfs_zap_caches(struct inode *inode) |
190 | { | |
191 | spin_lock(&inode->i_lock); | |
192 | nfs_zap_caches_locked(inode); | |
dc59250c | 193 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
194 | } |
195 | ||
cd9ae2b6 TM |
196 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
197 | { | |
198 | if (mapping->nrpages != 0) { | |
199 | spin_lock(&inode->i_lock); | |
6edf9609 | 200 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
cd9ae2b6 TM |
201 | spin_unlock(&inode->i_lock); |
202 | } | |
203 | } | |
204 | ||
f41f7418 | 205 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
206 | { |
207 | void (*clear_acl_cache)(struct inode *); | |
208 | ||
209 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
210 | if (clear_acl_cache != NULL) | |
211 | clear_acl_cache(inode); | |
dc59250c | 212 | spin_lock(&inode->i_lock); |
55296809 | 213 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 214 | spin_unlock(&inode->i_lock); |
1da177e4 | 215 | } |
1c606fb7 | 216 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 217 | |
c4812998 TM |
218 | void nfs_invalidate_atime(struct inode *inode) |
219 | { | |
220 | spin_lock(&inode->i_lock); | |
6edf9609 | 221 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
c4812998 TM |
222 | spin_unlock(&inode->i_lock); |
223 | } | |
ddda8e0a | 224 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 225 | |
1da177e4 | 226 | /* |
b37b03b7 TM |
227 | * Invalidate, but do not unhash, the inode. |
228 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 229 | */ |
b37b03b7 | 230 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 231 | { |
3a10c30a | 232 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 233 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
234 | } |
235 | ||
236 | struct nfs_find_desc { | |
237 | struct nfs_fh *fh; | |
238 | struct nfs_fattr *fattr; | |
239 | }; | |
240 | ||
241 | /* | |
242 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
243 | * this, and re-exported directories (also seen in NFSv2) | |
244 | * we are forced to allow 2 different inodes to have the same | |
245 | * i_ino. | |
246 | */ | |
247 | static int | |
248 | nfs_find_actor(struct inode *inode, void *opaque) | |
249 | { | |
250 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
251 | struct nfs_fh *fh = desc->fh; | |
252 | struct nfs_fattr *fattr = desc->fattr; | |
253 | ||
254 | if (NFS_FILEID(inode) != fattr->fileid) | |
255 | return 0; | |
f6488c9b JL |
256 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
257 | return 0; | |
1da177e4 LT |
258 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
259 | return 0; | |
260 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
261 | return 0; | |
262 | return 1; | |
263 | } | |
264 | ||
265 | static int | |
266 | nfs_init_locked(struct inode *inode, void *opaque) | |
267 | { | |
268 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
269 | struct nfs_fattr *fattr = desc->fattr; | |
270 | ||
99fadcd7 | 271 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
272 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
273 | return 0; | |
274 | } | |
275 | ||
e058f70b | 276 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
fd1defc2 TM |
277 | static void nfs_clear_label_invalid(struct inode *inode) |
278 | { | |
279 | spin_lock(&inode->i_lock); | |
280 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; | |
281 | spin_unlock(&inode->i_lock); | |
282 | } | |
283 | ||
aa9c2669 DQ |
284 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
285 | struct nfs4_label *label) | |
286 | { | |
287 | int error; | |
288 | ||
289 | if (label == NULL) | |
290 | return; | |
291 | ||
aa9c2669 DQ |
292 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
293 | error = security_inode_notifysecctx(inode, label->label, | |
294 | label->len); | |
295 | if (error) | |
296 | printk(KERN_ERR "%s() %s %d " | |
297 | "security_inode_notifysecctx() %d\n", | |
298 | __func__, | |
299 | (char *)label->label, | |
300 | label->len, error); | |
fd1defc2 | 301 | nfs_clear_label_invalid(inode); |
aa9c2669 DQ |
302 | } |
303 | } | |
304 | ||
e058f70b SD |
305 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
306 | { | |
307 | struct nfs4_label *label = NULL; | |
308 | int minor_version = server->nfs_client->cl_minorversion; | |
309 | ||
310 | if (minor_version < 2) | |
311 | return label; | |
312 | ||
313 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
314 | return label; | |
315 | ||
316 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
317 | if (label == NULL) | |
318 | return ERR_PTR(-ENOMEM); | |
319 | ||
320 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
321 | if (label->label == NULL) { | |
322 | kfree(label); | |
323 | return ERR_PTR(-ENOMEM); | |
324 | } | |
325 | label->len = NFS4_MAXLABELLEN; | |
326 | ||
327 | return label; | |
328 | } | |
329 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 330 | #else |
829e57d7 | 331 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
aa9c2669 DQ |
332 | struct nfs4_label *label) |
333 | { | |
334 | } | |
e058f70b | 335 | #endif |
aa9c2669 | 336 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 337 | |
1da177e4 LT |
338 | /* |
339 | * This is our front-end to iget that looks up inodes by file handle | |
340 | * instead of inode number. | |
341 | */ | |
342 | struct inode * | |
1775fd3e | 343 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
344 | { |
345 | struct nfs_find_desc desc = { | |
346 | .fh = fh, | |
347 | .fattr = fattr | |
348 | }; | |
03f28e3a | 349 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
350 | unsigned long hash; |
351 | ||
7ebb9315 BS |
352 | nfs_attr_check_mountpoint(sb, fattr); |
353 | ||
533eb461 AA |
354 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
355 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 356 | goto out_no_inode; |
9e6e70f8 | 357 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 358 | goto out_no_inode; |
1da177e4 LT |
359 | |
360 | hash = nfs_fattr_to_ino_t(fattr); | |
361 | ||
03f28e3a TM |
362 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
363 | if (inode == NULL) { | |
364 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 365 | goto out_no_inode; |
03f28e3a | 366 | } |
1da177e4 LT |
367 | |
368 | if (inode->i_state & I_NEW) { | |
369 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 370 | unsigned long now = jiffies; |
1da177e4 LT |
371 | |
372 | /* We set i_ino for the few things that still rely on it, | |
373 | * such as stat(2) */ | |
374 | inode->i_ino = hash; | |
375 | ||
376 | /* We can't support update_atime(), since the server will reset it */ | |
377 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
378 | inode->i_mode = fattr->mode; | |
62ab460c TM |
379 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
380 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
6edf9609 | 381 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
1da177e4 LT |
382 | /* Why so? Because we want revalidate for devices/FIFOs, and |
383 | * that's precisely what we have in nfs_file_inode_operations. | |
384 | */ | |
8fa5c000 | 385 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 386 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 387 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
388 | inode->i_data.a_ops = &nfs_file_aops; |
389 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
390 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 391 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 392 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 393 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 394 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
395 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
396 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
397 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
398 | inode->i_op = &nfs_referral_inode_operations; | |
399 | else | |
400 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 401 | inode->i_fop = NULL; |
36d43a43 | 402 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 403 | } |
1da177e4 LT |
404 | } else if (S_ISLNK(inode->i_mode)) |
405 | inode->i_op = &nfs_symlink_inode_operations; | |
406 | else | |
407 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
408 | ||
9e6e70f8 TM |
409 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
410 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
411 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 412 | inode->i_version = 0; |
9e6e70f8 | 413 | inode->i_size = 0; |
6d6b77f1 | 414 | clear_nlink(inode); |
9ff593c4 EB |
415 | inode->i_uid = make_kuid(&init_user_ns, -2); |
416 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
417 | inode->i_blocks = 0; |
418 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
419 | nfsi->write_io = 0; |
420 | nfsi->read_io = 0; | |
9e6e70f8 | 421 | |
33801147 | 422 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 423 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
424 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
425 | inode->i_atime = fattr->atime; | |
62ab460c | 426 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
6edf9609 | 427 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
428 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
429 | inode->i_mtime = fattr->mtime; | |
62ab460c | 430 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
6edf9609 | 431 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
432 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
433 | inode->i_ctime = fattr->ctime; | |
62ab460c | 434 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
6edf9609 | 435 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 | 436 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 437 | inode->i_version = fattr->change_attr; |
62ab460c | 438 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
6edf9609 | 439 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
440 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
441 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 442 | else |
6edf9609 TM |
443 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
444 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 | 445 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 446 | set_nlink(inode, fattr->nlink); |
62ab460c | 447 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
6edf9609 | 448 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
449 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
450 | inode->i_uid = fattr->uid; | |
62ab460c | 451 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
6edf9609 | 452 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
453 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
454 | inode->i_gid = fattr->gid; | |
62ab460c | 455 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
6edf9609 | 456 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
457 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
458 | inode->i_blocks = fattr->du.nfs2.blocks; | |
459 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
460 | /* |
461 | * report the blocks in 512byte units | |
462 | */ | |
463 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 464 | } |
aa9c2669 DQ |
465 | |
466 | nfs_setsecurity(inode, fattr, label); | |
467 | ||
1da177e4 | 468 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 469 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 470 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 471 | |
f1fe29b4 | 472 | nfs_fscache_init_inode(inode); |
ef79c097 | 473 | |
1da177e4 LT |
474 | unlock_new_inode(inode); |
475 | } else | |
476 | nfs_refresh_inode(inode, fattr); | |
1e8968c5 | 477 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 478 | inode->i_sb->s_id, |
1e8968c5 | 479 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 480 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
481 | atomic_read(&inode->i_count)); |
482 | ||
483 | out: | |
484 | return inode; | |
485 | ||
486 | out_no_inode: | |
03f28e3a | 487 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
488 | goto out; |
489 | } | |
89d77c8f | 490 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 491 | |
536e43d1 | 492 | #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 |
493 | |
494 | int | |
495 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
496 | { | |
497 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
498 | struct nfs_fattr *fattr; |
499 | int error = -ENOMEM; | |
1da177e4 | 500 | |
91d5b470 CL |
501 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
502 | ||
188b95dd JL |
503 | /* skip mode change if it's just for clearing setuid/setgid */ |
504 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
505 | attr->ia_valid &= ~ATTR_MODE; | |
506 | ||
1da177e4 LT |
507 | if (attr->ia_valid & ATTR_SIZE) { |
508 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
509 | attr->ia_valid &= ~ATTR_SIZE; | |
510 | } | |
511 | ||
512 | /* Optimization: if the end result is no change, don't RPC */ | |
513 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 514 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
515 | return 0; |
516 | ||
f4ce1299 TM |
517 | trace_nfs_setattr_enter(inode); |
518 | ||
755c1e20 | 519 | /* Write all dirty data */ |
1d59d61f TM |
520 | if (S_ISREG(inode->i_mode)) { |
521 | nfs_inode_dio_wait(inode); | |
e1552e19 | 522 | nfs_wb_all(inode); |
1d59d61f | 523 | } |
987f8dfc TM |
524 | |
525 | fattr = nfs_alloc_fattr(); | |
526 | if (fattr == NULL) | |
527 | goto out; | |
642ac549 TM |
528 | /* |
529 | * Return any delegations if we're going to change ACLs | |
530 | */ | |
531 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 532 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 533 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 534 | if (error == 0) |
aa9c2669 | 535 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
536 | nfs_free_fattr(fattr); |
537 | out: | |
f4ce1299 | 538 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
539 | return error; |
540 | } | |
ddda8e0a | 541 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 542 | |
a3d01454 TM |
543 | /** |
544 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
545 | * @inode: inode of the file used | |
546 | * @offset: file offset to start truncating | |
547 | * | |
548 | * This is a copy of the common vmtruncate, but with the locking | |
549 | * corrected to take into account the fact that NFS requires | |
550 | * inode->i_size to be updated under the inode->i_lock. | |
551 | */ | |
552 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
553 | { | |
c08d3b0e | 554 | int err; |
a3d01454 | 555 | |
c08d3b0e | 556 | err = inode_newsize_ok(inode, offset); |
557 | if (err) | |
558 | goto out; | |
a3d01454 | 559 | |
c08d3b0e | 560 | spin_lock(&inode->i_lock); |
c08d3b0e | 561 | i_size_write(inode, offset); |
6edf9609 TM |
562 | /* Optimisation */ |
563 | if (offset == 0) | |
564 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA; | |
c08d3b0e | 565 | spin_unlock(&inode->i_lock); |
566 | ||
7caef267 | 567 | truncate_pagecache(inode, offset); |
c08d3b0e | 568 | out: |
569 | return err; | |
a3d01454 TM |
570 | } |
571 | ||
65e4308d TM |
572 | /** |
573 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
574 | * @inode: pointer to struct inode | |
575 | * @attr: pointer to struct iattr | |
576 | * | |
577 | * Note: we do this in the *proc.c in order to ensure that | |
578 | * it works for things like exclusive creates too. | |
579 | */ | |
580 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
581 | { | |
582 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 583 | spin_lock(&inode->i_lock); |
1da177e4 | 584 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
585 | int mode = attr->ia_mode & S_IALLUGO; |
586 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
587 | inode->i_mode = mode; |
588 | } | |
589 | if ((attr->ia_valid & ATTR_UID) != 0) | |
590 | inode->i_uid = attr->ia_uid; | |
591 | if ((attr->ia_valid & ATTR_GID) != 0) | |
592 | inode->i_gid = attr->ia_gid; | |
6edf9609 TM |
593 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
594 | | NFS_INO_INVALID_ACL); | |
dc59250c | 595 | spin_unlock(&inode->i_lock); |
65e4308d TM |
596 | } |
597 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 598 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 599 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 600 | } |
1da177e4 | 601 | } |
ddda8e0a | 602 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 603 | |
311324ad TM |
604 | static void nfs_request_parent_use_readdirplus(struct dentry *dentry) |
605 | { | |
606 | struct dentry *parent; | |
607 | ||
608 | parent = dget_parent(dentry); | |
609 | nfs_force_use_readdirplus(parent->d_inode); | |
610 | dput(parent); | |
611 | } | |
612 | ||
613 | static bool nfs_need_revalidate_inode(struct inode *inode) | |
614 | { | |
615 | if (NFS_I(inode)->cache_validity & | |
616 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
617 | return true; | |
618 | if (nfs_attribute_cache_expired(inode)) | |
619 | return true; | |
620 | return false; | |
621 | } | |
622 | ||
1da177e4 LT |
623 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
624 | { | |
625 | struct inode *inode = dentry->d_inode; | |
55296809 | 626 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
627 | int err; |
628 | ||
f4ce1299 | 629 | trace_nfs_getattr_enter(inode); |
acdc53b2 | 630 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 631 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 632 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
633 | err = filemap_write_and_wait(inode->i_mapping); |
634 | if (err) | |
635 | goto out; | |
28c494c5 | 636 | } |
fc33a7bb CH |
637 | |
638 | /* | |
639 | * We may force a getattr if the user cares about atime. | |
640 | * | |
641 | * Note that we only have to check the vfsmount flags here: | |
642 | * - NFS always sets S_NOATIME by so checking it would give a | |
643 | * bogus result | |
644 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
645 | * no point in checking those. | |
646 | */ | |
647 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
648 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 649 | need_atime = 0; |
fc33a7bb | 650 | |
311324ad TM |
651 | if (need_atime || nfs_need_revalidate_inode(inode)) { |
652 | struct nfs_server *server = NFS_SERVER(inode); | |
653 | ||
654 | if (server->caps & NFS_CAP_READDIRPLUS) | |
655 | nfs_request_parent_use_readdirplus(dentry); | |
656 | err = __nfs_revalidate_inode(server, inode); | |
657 | } | |
4e769b93 | 658 | if (!err) { |
1da177e4 | 659 | generic_fillattr(inode, stat); |
f43bf0be | 660 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 661 | } |
acdc53b2 | 662 | out: |
f4ce1299 | 663 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
664 | return err; |
665 | } | |
ddda8e0a | 666 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 667 | |
f11ac8db TM |
668 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
669 | { | |
670 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
671 | l_ctx->lockowner.l_owner = current->files; |
672 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 673 | INIT_LIST_HEAD(&l_ctx->list); |
577b4232 | 674 | nfs_iocounter_init(&l_ctx->io_count); |
f11ac8db TM |
675 | } |
676 | ||
677 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
678 | { | |
8c86899f TM |
679 | struct nfs_lock_context *head = &ctx->lock_context; |
680 | struct nfs_lock_context *pos = head; | |
f11ac8db | 681 | |
8c86899f | 682 | do { |
2a369153 | 683 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 684 | continue; |
2a369153 | 685 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
686 | continue; |
687 | atomic_inc(&pos->count); | |
688 | return pos; | |
8c86899f | 689 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
690 | return NULL; |
691 | } | |
692 | ||
693 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
694 | { | |
695 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 696 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
697 | |
698 | spin_lock(&inode->i_lock); | |
699 | res = __nfs_find_lock_context(ctx); | |
700 | if (res == NULL) { | |
701 | spin_unlock(&inode->i_lock); | |
702 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
703 | if (new == NULL) | |
b3c54de6 | 704 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
705 | nfs_init_lock_context(new); |
706 | spin_lock(&inode->i_lock); | |
707 | res = __nfs_find_lock_context(ctx); | |
708 | if (res == NULL) { | |
709 | list_add_tail(&new->list, &ctx->lock_context.list); | |
710 | new->open_context = ctx; | |
711 | res = new; | |
712 | new = NULL; | |
713 | } | |
714 | } | |
715 | spin_unlock(&inode->i_lock); | |
716 | kfree(new); | |
717 | return res; | |
718 | } | |
719 | ||
720 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
721 | { | |
722 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 723 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
724 | |
725 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
726 | return; | |
727 | list_del(&l_ctx->list); | |
728 | spin_unlock(&inode->i_lock); | |
729 | kfree(l_ctx); | |
730 | } | |
731 | ||
7fe5c398 TM |
732 | /** |
733 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
734 | * @ctx: pointer to context | |
735 | * @is_sync: is this a synchronous close | |
736 | * | |
737 | * always ensure that the attributes are up to date if we're mounted | |
738 | * with close-to-open semantics | |
739 | */ | |
740 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
741 | { | |
742 | struct inode *inode; | |
743 | struct nfs_server *server; | |
744 | ||
745 | if (!(ctx->mode & FMODE_WRITE)) | |
746 | return; | |
747 | if (!is_sync) | |
748 | return; | |
3d4ff43d | 749 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
750 | if (!list_empty(&NFS_I(inode)->open_files)) |
751 | return; | |
752 | server = NFS_SERVER(inode); | |
753 | if (server->flags & NFS_MOUNT_NOCTO) | |
754 | return; | |
755 | nfs_revalidate_inode(server, inode); | |
756 | } | |
ddda8e0a | 757 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 758 | |
5ede7b1c | 759 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
760 | { |
761 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
762 | struct rpc_cred *cred = rpc_lookup_cred(); |
763 | if (IS_ERR(cred)) | |
764 | return ERR_CAST(cred); | |
1da177e4 | 765 | |
f52720ca | 766 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
767 | if (!ctx) { |
768 | put_rpccred(cred); | |
769 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 770 | } |
5ede7b1c AV |
771 | nfs_sb_active(dentry->d_sb); |
772 | ctx->dentry = dget(dentry); | |
773 | ctx->cred = cred; | |
774 | ctx->state = NULL; | |
775 | ctx->mode = f_mode; | |
776 | ctx->flags = 0; | |
777 | ctx->error = 0; | |
778 | nfs_init_lock_context(&ctx->lock_context); | |
779 | ctx->lock_context.open_context = ctx; | |
780 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 781 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
782 | return ctx; |
783 | } | |
89d77c8f | 784 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
785 | |
786 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
787 | { | |
788 | if (ctx != NULL) | |
f11ac8db | 789 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
790 | return ctx; |
791 | } | |
89d77c8f | 792 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 793 | |
7fe5c398 | 794 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 795 | { |
3d4ff43d AV |
796 | struct inode *inode = ctx->dentry->d_inode; |
797 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 798 | |
5c78f58e | 799 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
800 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
801 | return; | |
802 | list_del(&ctx->list); | |
803 | spin_unlock(&inode->i_lock); | |
ef84303e | 804 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 805 | return; |
5c78f58e TM |
806 | if (inode != NULL) |
807 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
808 | if (ctx->cred != NULL) |
809 | put_rpccred(ctx->cred); | |
3d4ff43d | 810 | dput(ctx->dentry); |
322b2b90 | 811 | nfs_sb_deactive(sb); |
82be417a | 812 | kfree(ctx->mdsthreshold); |
3bec63db TM |
813 | kfree(ctx); |
814 | } | |
815 | ||
a49c3c77 TM |
816 | void put_nfs_open_context(struct nfs_open_context *ctx) |
817 | { | |
818 | __put_nfs_open_context(ctx, 0); | |
819 | } | |
89d77c8f | 820 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 821 | |
1da177e4 LT |
822 | /* |
823 | * Ensure that mmap has a recent RPC credential for use when writing out | |
824 | * shared pages | |
825 | */ | |
c45ffdd2 | 826 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 827 | { |
c45ffdd2 | 828 | struct inode *inode = ctx->dentry->d_inode; |
1da177e4 LT |
829 | struct nfs_inode *nfsi = NFS_I(inode); |
830 | ||
1da177e4 LT |
831 | spin_lock(&inode->i_lock); |
832 | list_add(&ctx->list, &nfsi->open_files); | |
833 | spin_unlock(&inode->i_lock); | |
834 | } | |
c45ffdd2 TM |
835 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
836 | ||
837 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
838 | { | |
839 | filp->private_data = get_nfs_open_context(ctx); | |
840 | if (list_empty(&ctx->list)) | |
841 | nfs_inode_attach_open_context(ctx); | |
842 | } | |
89d77c8f | 843 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 844 | |
d530838b TM |
845 | /* |
846 | * Given an inode, search for an open context with the desired characteristics | |
847 | */ | |
dc0b027d | 848 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
849 | { |
850 | struct nfs_inode *nfsi = NFS_I(inode); | |
851 | struct nfs_open_context *pos, *ctx = NULL; | |
852 | ||
853 | spin_lock(&inode->i_lock); | |
854 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
855 | if (cred != NULL && pos->cred != cred) |
856 | continue; | |
1544fa0f TM |
857 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
858 | continue; | |
859 | ctx = get_nfs_open_context(pos); | |
860 | break; | |
1da177e4 LT |
861 | } |
862 | spin_unlock(&inode->i_lock); | |
863 | return ctx; | |
864 | } | |
865 | ||
b92dccf6 | 866 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 867 | { |
cd3758e3 | 868 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
869 | |
870 | if (ctx) { | |
c45ffdd2 TM |
871 | struct inode *inode = ctx->dentry->d_inode; |
872 | ||
1da177e4 LT |
873 | filp->private_data = NULL; |
874 | spin_lock(&inode->i_lock); | |
875 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
876 | spin_unlock(&inode->i_lock); | |
f895c53f | 877 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
878 | } |
879 | } | |
880 | ||
881 | /* | |
882 | * These allocate and release file read/write context information. | |
883 | */ | |
884 | int nfs_open(struct inode *inode, struct file *filp) | |
885 | { | |
886 | struct nfs_open_context *ctx; | |
1da177e4 | 887 | |
5ede7b1c AV |
888 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
889 | if (IS_ERR(ctx)) | |
890 | return PTR_ERR(ctx); | |
1da177e4 LT |
891 | nfs_file_set_open_context(filp, ctx); |
892 | put_nfs_open_context(ctx); | |
f1fe29b4 | 893 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
894 | return 0; |
895 | } | |
896 | ||
897 | int nfs_release(struct inode *inode, struct file *filp) | |
898 | { | |
1da177e4 LT |
899 | nfs_file_clear_open_context(filp); |
900 | return 0; | |
901 | } | |
902 | ||
903 | /* | |
904 | * This function is called whenever some part of NFS notices that | |
905 | * the cached attributes have to be refreshed. | |
906 | */ | |
907 | int | |
908 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
909 | { | |
910 | int status = -ESTALE; | |
1775fd3e | 911 | struct nfs4_label *label = NULL; |
a3cba2aa | 912 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 913 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 914 | |
1e8968c5 NV |
915 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
916 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 917 | |
f4ce1299 TM |
918 | trace_nfs_revalidate_inode_enter(inode); |
919 | ||
85233a7a | 920 | if (is_bad_inode(inode)) |
691beb13 | 921 | goto out; |
1da177e4 | 922 | if (NFS_STALE(inode)) |
412d582e | 923 | goto out; |
7fdc49c4 | 924 | |
a3cba2aa TM |
925 | status = -ENOMEM; |
926 | fattr = nfs_alloc_fattr(); | |
927 | if (fattr == NULL) | |
928 | goto out; | |
929 | ||
691beb13 | 930 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
931 | |
932 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
933 | if (IS_ERR(label)) { | |
934 | status = PTR_ERR(label); | |
935 | goto out; | |
936 | } | |
937 | ||
1775fd3e | 938 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 | 939 | if (status != 0) { |
1e8968c5 | 940 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 941 | inode->i_sb->s_id, |
1e8968c5 | 942 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
943 | if (status == -ESTALE) { |
944 | nfs_zap_caches(inode); | |
945 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 946 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 947 | } |
14c43f76 | 948 | goto err_out; |
1da177e4 LT |
949 | } |
950 | ||
a3cba2aa | 951 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 952 | if (status) { |
1e8968c5 | 953 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 954 | inode->i_sb->s_id, |
1e8968c5 | 955 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 956 | goto err_out; |
1da177e4 | 957 | } |
55296809 | 958 | |
24aa1fe6 | 959 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 960 | nfs_zap_acl_cache(inode); |
55296809 | 961 | |
3da580aa JL |
962 | nfs_setsecurity(inode, fattr, label); |
963 | ||
1e8968c5 | 964 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 965 | inode->i_sb->s_id, |
1e8968c5 | 966 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 967 | |
14c43f76 DQ |
968 | err_out: |
969 | nfs4_label_free(label); | |
970 | out: | |
a3cba2aa | 971 | nfs_free_fattr(fattr); |
f4ce1299 | 972 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
973 | return status; |
974 | } | |
975 | ||
976 | int nfs_attribute_timeout(struct inode *inode) | |
977 | { | |
978 | struct nfs_inode *nfsi = NFS_I(inode); | |
979 | ||
d7cf8dd0 TM |
980 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
981 | } | |
982 | ||
43f291cd | 983 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 984 | { |
b4d2314b | 985 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 986 | return 0; |
d7cf8dd0 | 987 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
988 | } |
989 | ||
990 | /** | |
991 | * nfs_revalidate_inode - Revalidate the inode attributes | |
992 | * @server - pointer to nfs_server struct | |
993 | * @inode - pointer to inode struct | |
994 | * | |
995 | * Updates inode attribute information by retrieving the data from the server. | |
996 | */ | |
997 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
998 | { | |
311324ad | 999 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1000 | return NFS_STALE(inode) ? -ESTALE : 0; |
1001 | return __nfs_revalidate_inode(server, inode); | |
1002 | } | |
1c606fb7 | 1003 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1004 | |
1cda707d | 1005 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1006 | { |
1007 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1008 | int ret; |
1009 | ||
717d44e8 | 1010 | if (mapping->nrpages != 0) { |
f8806c84 TM |
1011 | if (S_ISREG(inode->i_mode)) { |
1012 | ret = nfs_sync_mapping(mapping); | |
1013 | if (ret < 0) | |
1014 | return ret; | |
1015 | } | |
1016 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1017 | if (ret < 0) |
1018 | return ret; | |
1019 | } | |
d529ef83 JL |
1020 | if (S_ISDIR(inode->i_mode)) { |
1021 | spin_lock(&inode->i_lock); | |
717d44e8 | 1022 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1023 | spin_unlock(&inode->i_lock); |
1024 | } | |
717d44e8 | 1025 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1026 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1027 | |
1e8968c5 NV |
1028 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1029 | inode->i_sb->s_id, | |
1030 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1031 | return 0; |
1032 | } | |
1033 | ||
b4b1eadf TM |
1034 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
1035 | { | |
1036 | if (nfs_have_delegated_attributes(inode)) | |
1037 | return false; | |
1038 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
1039 | || nfs_attribute_timeout(inode) | |
1040 | || NFS_STALE(inode); | |
1041 | } | |
1042 | ||
717d44e8 TM |
1043 | /** |
1044 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1045 | * @inode - pointer to host inode | |
1046 | * @mapping - pointer to mapping | |
717d44e8 TM |
1047 | */ |
1048 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1049 | { | |
1050 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1051 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1052 | int ret = 0; |
dc59250c | 1053 | |
29418aa4 MG |
1054 | /* swapfiles are not supposed to be shared. */ |
1055 | if (IS_SWAPFILE(inode)) | |
1056 | goto out; | |
1057 | ||
b4b1eadf | 1058 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1059 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1060 | if (ret < 0) | |
1061 | goto out; | |
7d52e862 | 1062 | } |
d529ef83 JL |
1063 | |
1064 | /* | |
1065 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1066 | * invalidations that come in while we're shooting down the mappings | |
1067 | * are respected. But, that leaves a race window where one revalidator | |
1068 | * can clear the flag, and then another checks it before the mapping | |
1069 | * gets invalidated. Fix that by serializing access to this part of | |
1070 | * the function. | |
1071 | * | |
1072 | * At the same time, we need to allow other tasks to see whether we | |
1073 | * might be in the middle of invalidating the pages, so we only set | |
1074 | * the bit lock here if it looks like we're going to be doing that. | |
1075 | */ | |
1076 | for (;;) { | |
1077 | ret = wait_on_bit(bitlock, NFS_INO_INVALIDATING, | |
1078 | nfs_wait_bit_killable, TASK_KILLABLE); | |
1079 | if (ret) | |
1080 | goto out; | |
17dfeb91 TM |
1081 | spin_lock(&inode->i_lock); |
1082 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1083 | spin_unlock(&inode->i_lock); | |
1084 | continue; | |
1085 | } | |
1086 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1087 | break; |
d529ef83 | 1088 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1089 | goto out; |
f4ce1299 TM |
1090 | } |
1091 | ||
17dfeb91 | 1092 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1093 | smp_wmb(); |
17dfeb91 TM |
1094 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1095 | spin_unlock(&inode->i_lock); | |
1096 | trace_nfs_invalidate_mapping_enter(inode); | |
1097 | ret = nfs_invalidate_mapping(inode, mapping); | |
1098 | trace_nfs_invalidate_mapping_exit(inode, ret); | |
1099 | ||
d529ef83 | 1100 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1101 | smp_mb__after_atomic(); |
d529ef83 | 1102 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1103 | out: |
44b11874 | 1104 | return ret; |
7d52e862 TM |
1105 | } |
1106 | ||
27dc1cd3 | 1107 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1108 | { |
1109 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1110 | unsigned long ret = 0; |
a895b4a1 | 1111 | |
9e6e70f8 TM |
1112 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1113 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1114 | && inode->i_version == fattr->pre_change_attr) { |
1115 | inode->i_version = fattr->change_attr; | |
70ca8852 | 1116 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1117 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1118 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1119 | } |
a895b4a1 | 1120 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1121 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1122 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1123 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1124 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1125 | ret |= NFS_INO_INVALID_ATTR; | |
1126 | } | |
9e6e70f8 TM |
1127 | |
1128 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1129 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1130 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1131 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1132 | if (S_ISDIR(inode->i_mode)) | |
6edf9609 | 1133 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1134 | ret |= NFS_INO_INVALID_ATTR; |
a895b4a1 | 1135 | } |
9e6e70f8 TM |
1136 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1137 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1138 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
1139 | && nfsi->npages == 0) { |
1140 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
1141 | ret |= NFS_INO_INVALID_ATTR; | |
1142 | } | |
de242c0b | 1143 | |
27dc1cd3 | 1144 | return ret; |
a895b4a1 TM |
1145 | } |
1146 | ||
1da177e4 | 1147 | /** |
33801147 | 1148 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1149 | * @inode - pointer to inode |
1150 | * @fattr - updated attributes | |
1151 | * | |
1152 | * Verifies the attribute cache. If we have just changed the attributes, | |
1153 | * so that fattr carries weak cache consistency data, then it may | |
1154 | * also update the ctime/mtime/change_attribute. | |
1155 | */ | |
33801147 | 1156 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1157 | { |
1158 | struct nfs_inode *nfsi = NFS_I(inode); | |
1159 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1160 | unsigned long invalid = 0; |
1da177e4 | 1161 | |
dc59250c | 1162 | |
01da47bd TM |
1163 | if (nfs_have_delegated_attributes(inode)) |
1164 | return 0; | |
ca62b9c3 | 1165 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1166 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1167 | return -EIO; | |
1168 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1169 | return -EIO; |
ca62b9c3 | 1170 | |
9e6e70f8 | 1171 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 1172 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 1173 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1174 | |
1da177e4 | 1175 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1176 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1177 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1178 | |
9e6e70f8 TM |
1179 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1180 | cur_size = i_size_read(inode); | |
1181 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1182 | if (cur_size != new_isize && nfsi->npages == 0) | |
1183 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1184 | } | |
1da177e4 LT |
1185 | |
1186 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1187 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1188 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1189 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1190 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1191 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1192 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1193 | |
1194 | /* Has the link count changed? */ | |
9e6e70f8 | 1195 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1196 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1197 | |
9e6e70f8 | 1198 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1199 | invalid |= NFS_INO_INVALID_ATIME; |
1200 | ||
1201 | if (invalid != 0) | |
6edf9609 | 1202 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1203 | |
33801147 | 1204 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1205 | return 0; |
1206 | } | |
1207 | ||
a10ad176 | 1208 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1209 | { |
9e6e70f8 TM |
1210 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1211 | return 0; | |
a10ad176 TM |
1212 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1213 | } | |
1214 | ||
1215 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1216 | { | |
9e6e70f8 TM |
1217 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1218 | return 0; | |
a10ad176 TM |
1219 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1220 | } | |
870a5be8 | 1221 | |
ae05f269 | 1222 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1223 | |
1224 | static unsigned long nfs_read_attr_generation_counter(void) | |
1225 | { | |
ae05f269 | 1226 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1227 | } |
1228 | ||
1229 | unsigned long nfs_inc_attr_generation_counter(void) | |
1230 | { | |
ae05f269 | 1231 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1232 | } |
1233 | ||
1234 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1235 | { | |
1236 | fattr->valid = 0; | |
1237 | fattr->time_start = jiffies; | |
1238 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1239 | fattr->owner_name = NULL; |
1240 | fattr->group_name = NULL; | |
4704f0e2 | 1241 | } |
ddda8e0a | 1242 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1243 | |
2d36bfde TM |
1244 | struct nfs_fattr *nfs_alloc_fattr(void) |
1245 | { | |
1246 | struct nfs_fattr *fattr; | |
1247 | ||
1248 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1249 | if (fattr != NULL) | |
1250 | nfs_fattr_init(fattr); | |
1251 | return fattr; | |
1252 | } | |
ddda8e0a | 1253 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1254 | |
1255 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1256 | { | |
1257 | struct nfs_fh *fh; | |
1258 | ||
1259 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1260 | if (fh != NULL) | |
1261 | fh->size = 0; | |
1262 | return fh; | |
1263 | } | |
ddda8e0a | 1264 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1265 | |
e27d359e | 1266 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1267 | /* |
1268 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1269 | * in the same way that wireshark does | |
1270 | * | |
1271 | * @fh: file handle | |
1272 | * | |
1273 | * For debugging only. | |
1274 | */ | |
1275 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1276 | { | |
1277 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1278 | * not on the result */ | |
1264a2f0 | 1279 | return nfs_fhandle_hash(fh); |
d8e0539e | 1280 | } |
9e6ee76d | 1281 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1282 | |
1283 | /* | |
20d27e92 CL |
1284 | * _nfs_display_fhandle - display an NFS file handle on the console |
1285 | * | |
1286 | * @fh: file handle to display | |
1287 | * @caption: display caption | |
1288 | * | |
1289 | * For debugging only. | |
1290 | */ | |
20d27e92 CL |
1291 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1292 | { | |
1293 | unsigned short i; | |
1294 | ||
fa68a1ba | 1295 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1296 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1297 | return; | |
1298 | } | |
1299 | ||
d8e0539e WAA |
1300 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1301 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1302 | for (i = 0; i < fh->size; i += 16) { |
1303 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1304 | ||
1305 | switch ((fh->size - i - 1) >> 2) { | |
1306 | case 0: | |
1307 | printk(KERN_DEFAULT " %08x\n", | |
1308 | be32_to_cpup(pos)); | |
1309 | break; | |
1310 | case 1: | |
1311 | printk(KERN_DEFAULT " %08x %08x\n", | |
1312 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1313 | break; | |
1314 | case 2: | |
1315 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1316 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1317 | be32_to_cpup(pos + 2)); | |
1318 | break; | |
1319 | default: | |
1320 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1321 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1322 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1323 | } | |
1324 | } | |
1325 | } | |
9e6ee76d | 1326 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1327 | #endif |
1328 | ||
a10ad176 TM |
1329 | /** |
1330 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1331 | * @inode - pointer to inode | |
1332 | * @fattr - attributes | |
1333 | * | |
1334 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1335 | * attributes got scheduled after another call carrying updated ones. | |
1336 | * | |
1337 | * To do so, the function first assumes that a more recent ctime means | |
1338 | * that the attributes in fattr are newer, however it also attempt to | |
1339 | * catch the case where ctime either didn't change, or went backwards | |
1340 | * (if someone reset the clock on the server) by looking at whether | |
1341 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1342 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1343 | * |
1344 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1345 | * more recent than the ones cached in the inode. | |
1346 | * | |
1347 | */ | |
1348 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1349 | { | |
1350 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1351 | ||
4704f0e2 | 1352 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1353 | nfs_ctime_need_update(inode, fattr) || |
1354 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1355 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1356 | } |
1357 | ||
d8c951c3 TM |
1358 | /* |
1359 | * Don't trust the change_attribute, mtime, ctime or size if | |
1360 | * a pnfs LAYOUTCOMMIT is outstanding | |
1361 | */ | |
1362 | static void nfs_inode_attrs_handle_layoutcommit(struct inode *inode, | |
1363 | struct nfs_fattr *fattr) | |
1364 | { | |
1365 | if (pnfs_layoutcommit_outstanding(inode)) | |
1366 | fattr->valid &= ~(NFS_ATTR_FATTR_CHANGE | | |
1367 | NFS_ATTR_FATTR_MTIME | | |
1368 | NFS_ATTR_FATTR_CTIME | | |
1369 | NFS_ATTR_FATTR_SIZE); | |
1370 | } | |
1371 | ||
a10ad176 TM |
1372 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1373 | { | |
f4ce1299 TM |
1374 | int ret; |
1375 | ||
1376 | trace_nfs_refresh_inode_enter(inode); | |
1377 | ||
d8c951c3 TM |
1378 | nfs_inode_attrs_handle_layoutcommit(inode, fattr); |
1379 | ||
a10ad176 | 1380 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1381 | ret = nfs_update_inode(inode, fattr); |
1382 | else | |
1383 | ret = nfs_check_inode_attributes(inode, fattr); | |
1384 | ||
1385 | trace_nfs_refresh_inode_exit(inode, ret); | |
1386 | return ret; | |
870a5be8 TM |
1387 | } |
1388 | ||
33801147 TM |
1389 | /** |
1390 | * nfs_refresh_inode - try to update the inode attribute cache | |
1391 | * @inode - pointer to inode | |
1392 | * @fattr - updated attributes | |
1393 | * | |
1394 | * Check that an RPC call that returned attributes has not overlapped with | |
1395 | * other recent updates of the inode metadata, then decide whether it is | |
1396 | * safe to do a full update of the inode attributes, or whether just to | |
1397 | * call nfs_check_inode_attributes. | |
1398 | */ | |
1399 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1400 | { | |
33801147 TM |
1401 | int status; |
1402 | ||
1403 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1404 | return 0; | |
1405 | spin_lock(&inode->i_lock); | |
870a5be8 | 1406 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1407 | spin_unlock(&inode->i_lock); |
ef79c097 | 1408 | |
33801147 TM |
1409 | return status; |
1410 | } | |
ddda8e0a | 1411 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1412 | |
d65f557f TM |
1413 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1414 | { | |
6edf9609 | 1415 | unsigned long invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
d65f557f | 1416 | |
6edf9609 TM |
1417 | if (S_ISDIR(inode->i_mode)) |
1418 | invalid |= NFS_INO_INVALID_DATA; | |
1419 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1420 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1421 | return 0; | |
1422 | return nfs_refresh_inode_locked(inode, fattr); | |
1423 | } | |
1424 | ||
decf491f TM |
1425 | /** |
1426 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1427 | * @inode - pointer to inode | |
1428 | * @fattr - updated attributes | |
1429 | * | |
1430 | * After an operation that has changed the inode metadata, mark the | |
1431 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1432 | * |
1433 | * NB: if the server didn't return any post op attributes, this | |
1434 | * function will force the retrieval of attributes before the next | |
1435 | * NFS request. Thus it should be used only for operations that | |
1436 | * are expected to change one or more attributes, to avoid | |
1437 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1438 | */ |
1439 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1440 | { | |
d65f557f | 1441 | int status; |
decf491f | 1442 | |
7668fdbe | 1443 | spin_lock(&inode->i_lock); |
d65f557f | 1444 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1445 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1446 | |
870a5be8 | 1447 | return status; |
decf491f | 1448 | } |
1c606fb7 | 1449 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1450 | |
70ca8852 TM |
1451 | /** |
1452 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1453 | * @inode - pointer to inode | |
1454 | * @fattr - updated attributes | |
1455 | * | |
1456 | * After an operation that has changed the inode metadata, mark the | |
1457 | * attribute cache as being invalid, then try to update it. Fake up | |
1458 | * weak cache consistency data, if none exist. | |
1459 | * | |
1460 | * This function is mainly designed to be used by the ->write_done() functions. | |
1461 | */ | |
1462 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1463 | { | |
d65f557f TM |
1464 | int status; |
1465 | ||
1466 | spin_lock(&inode->i_lock); | |
1467 | /* Don't do a WCC update if these attributes are already stale */ | |
1468 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1469 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1470 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1471 | | NFS_ATTR_FATTR_PRESIZE | |
1472 | | NFS_ATTR_FATTR_PREMTIME | |
1473 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1474 | goto out_noforce; |
1475 | } | |
9e6e70f8 TM |
1476 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1477 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1478 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1479 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1480 | } |
9e6e70f8 TM |
1481 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1482 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1483 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1484 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1485 | } | |
1486 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1487 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1488 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1489 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1490 | } | |
1491 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1492 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1493 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1494 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1495 | } |
d65f557f TM |
1496 | out_noforce: |
1497 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1498 | spin_unlock(&inode->i_lock); | |
1499 | return status; | |
70ca8852 | 1500 | } |
ddda8e0a | 1501 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1502 | |
1da177e4 LT |
1503 | /* |
1504 | * Many nfs protocol calls return the new file attributes after | |
1505 | * an operation. Here we update the inode to reflect the state | |
1506 | * of the server's inode. | |
1507 | * | |
1508 | * This is a bit tricky because we have to make sure all dirty pages | |
1509 | * have been sent off to the server before calling invalidate_inode_pages. | |
1510 | * To make sure no other process adds more write requests while we try | |
1511 | * our best to flush them, we make them sleep during the attribute refresh. | |
1512 | * | |
1513 | * A very similar scenario holds for the dir cache. | |
1514 | */ | |
24aa1fe6 | 1515 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1516 | { |
8b4bdcf8 | 1517 | struct nfs_server *server; |
1da177e4 | 1518 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1519 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1520 | unsigned long invalid = 0; |
3e7d950a | 1521 | unsigned long now = jiffies; |
62ab460c | 1522 | unsigned long save_cache_validity; |
1da177e4 | 1523 | |
1e8968c5 | 1524 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1525 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1526 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1527 | atomic_read(&inode->i_count), fattr->valid); |
1528 | ||
e73e6c9e MT |
1529 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1530 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1531 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1532 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1533 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1534 | (long long)fattr->fileid); | |
1535 | goto out_err; | |
1536 | } | |
1da177e4 LT |
1537 | |
1538 | /* | |
1539 | * Make sure the inode's type hasn't changed. | |
1540 | */ | |
e73e6c9e MT |
1541 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1542 | /* | |
1543 | * Big trouble! The inode has become a different object. | |
1544 | */ | |
1e8968c5 | 1545 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1546 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1547 | goto out_err; | |
1548 | } | |
1da177e4 | 1549 | |
8b4bdcf8 | 1550 | server = NFS_SERVER(inode); |
a0356862 | 1551 | /* Update the fsid? */ |
9e6e70f8 | 1552 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1553 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1554 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1555 | server->fsid = fattr->fsid; |
1556 | ||
1da177e4 LT |
1557 | /* |
1558 | * Update the read time so we don't revalidate too often. | |
1559 | */ | |
33801147 | 1560 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1561 | |
62ab460c TM |
1562 | save_cache_validity = nfsi->cache_validity; |
1563 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1564 | | NFS_INO_INVALID_ATIME | |
1565 | | NFS_INO_REVAL_FORCED | |
1566 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1567 | |
a895b4a1 | 1568 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1569 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1570 | |
47aabaa7 | 1571 | /* More cache consistency checks */ |
9e6e70f8 | 1572 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1573 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1574 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1575 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1576 | invalid |= NFS_INO_INVALID_ATTR |
1577 | | NFS_INO_INVALID_DATA | |
1578 | | NFS_INO_INVALID_ACCESS | |
1579 | | NFS_INO_INVALID_ACL | |
1580 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1581 | if (S_ISDIR(inode->i_mode)) |
1582 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1583 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1584 | } |
62ab460c | 1585 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
43b6535e | 1586 | nfsi->cache_validity |= save_cache_validity; |
9e6e70f8 TM |
1587 | |
1588 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1589 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c | 1590 | } else if (server->caps & NFS_CAP_MTIME) |
43b6535e TM |
1591 | nfsi->cache_validity |= save_cache_validity & |
1592 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1593 | | NFS_INO_REVAL_FORCED); |
1594 | ||
9e6e70f8 | 1595 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1596 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c | 1597 | } else if (server->caps & NFS_CAP_CTIME) |
43b6535e TM |
1598 | nfsi->cache_validity |= save_cache_validity & |
1599 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1600 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1601 | |
951a143b | 1602 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1603 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1604 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1605 | cur_isize = i_size_read(inode); | |
1606 | if (new_isize != cur_isize) { | |
1607 | /* Do we perhaps have any outstanding writes, or has | |
1608 | * the file grown beyond our last write? */ | |
d8c951c3 | 1609 | if ((nfsi->npages == 0) || new_isize > cur_isize) { |
9e6e70f8 TM |
1610 | i_size_write(inode, new_isize); |
1611 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
f2467b6f | 1612 | invalid &= ~NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 1613 | } |
60c16ea8 HJ |
1614 | dprintk("NFS: isize change on server for file %s/%ld " |
1615 | "(%Ld to %Ld)\n", | |
1616 | inode->i_sb->s_id, | |
1617 | inode->i_ino, | |
1618 | (long long)cur_isize, | |
1619 | (long long)new_isize); | |
1da177e4 | 1620 | } |
62ab460c | 1621 | } else |
43b6535e TM |
1622 | nfsi->cache_validity |= save_cache_validity & |
1623 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1624 | | NFS_INO_REVAL_PAGECACHE |
1625 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1626 | |
1da177e4 | 1627 | |
9e6e70f8 TM |
1628 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1629 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c | 1630 | else if (server->caps & NFS_CAP_ATIME) |
43b6535e TM |
1631 | nfsi->cache_validity |= save_cache_validity & |
1632 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1633 | | NFS_INO_REVAL_FORCED); |
1da177e4 | 1634 | |
9e6e70f8 TM |
1635 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1636 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1637 | umode_t newmode = inode->i_mode & S_IFMT; |
1638 | newmode |= fattr->mode & S_IALLUGO; | |
1639 | inode->i_mode = newmode; | |
9e6e70f8 | 1640 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1641 | } |
62ab460c | 1642 | } else if (server->caps & NFS_CAP_MODE) |
43b6535e TM |
1643 | nfsi->cache_validity |= save_cache_validity & |
1644 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1645 | | NFS_INO_INVALID_ACCESS |
1646 | | NFS_INO_INVALID_ACL | |
1647 | | NFS_INO_REVAL_FORCED); | |
1648 | ||
9e6e70f8 | 1649 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1650 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1651 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1652 | inode->i_uid = fattr->uid; | |
1653 | } | |
62ab460c | 1654 | } else if (server->caps & NFS_CAP_OWNER) |
43b6535e TM |
1655 | nfsi->cache_validity |= save_cache_validity & |
1656 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1657 | | NFS_INO_INVALID_ACCESS |
1658 | | NFS_INO_INVALID_ACL | |
1659 | | NFS_INO_REVAL_FORCED); | |
1660 | ||
9e6e70f8 | 1661 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1662 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1663 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1664 | inode->i_gid = fattr->gid; | |
1665 | } | |
62ab460c | 1666 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
43b6535e TM |
1667 | nfsi->cache_validity |= save_cache_validity & |
1668 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1669 | | NFS_INO_INVALID_ACCESS |
1670 | | NFS_INO_INVALID_ACL | |
1671 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1672 | |
9e6e70f8 TM |
1673 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1674 | if (inode->i_nlink != fattr->nlink) { | |
1675 | invalid |= NFS_INO_INVALID_ATTR; | |
1676 | if (S_ISDIR(inode->i_mode)) | |
1677 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1678 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1679 | } |
62ab460c | 1680 | } else if (server->caps & NFS_CAP_NLINK) |
43b6535e TM |
1681 | nfsi->cache_validity |= save_cache_validity & |
1682 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1683 | | NFS_INO_REVAL_FORCED); |
1da177e4 | 1684 | |
9e6e70f8 | 1685 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1686 | /* |
1687 | * report the blocks in 512byte units | |
1688 | */ | |
1689 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1690 | } |
9e6e70f8 TM |
1691 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1692 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1693 | |
1694 | /* Update attrtimeo value if we're out of the unstable period */ | |
fd1defc2 | 1695 | if (invalid & NFS_INO_INVALID_ATTR) { |
91d5b470 | 1696 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1697 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1698 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1699 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1700 | } else { |
64672d55 | 1701 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1702 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1703 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1704 | nfsi->attrtimeo_timestamp = now; | |
1705 | } | |
1da177e4 | 1706 | } |
f2115dc9 | 1707 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1708 | /* Don't invalidate the data if we were to blame */ |
1709 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1710 | || S_ISLNK(inode->i_mode))) | |
1711 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1712 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1713 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
6edf9609 | 1714 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 1715 | |
1da177e4 | 1716 | return 0; |
b37b03b7 | 1717 | out_err: |
1da177e4 LT |
1718 | /* |
1719 | * No need to worry about unhashing the dentry, as the | |
1720 | * lookup validation will know that the inode is bad. | |
1721 | * (But we fall through to invalidate the caches.) | |
1722 | */ | |
1723 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1724 | return -ESTALE; |
1725 | } | |
1726 | ||
f7b422b1 | 1727 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1728 | { |
1729 | struct nfs_inode *nfsi; | |
e94b1766 | 1730 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1731 | if (!nfsi) |
1732 | return NULL; | |
55296809 CL |
1733 | nfsi->flags = 0UL; |
1734 | nfsi->cache_validity = 0UL; | |
89d77c8f | 1735 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1736 | nfsi->nfs4_acl = NULL; |
1737 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1738 | return &nfsi->vfs_inode; |
1739 | } | |
89d77c8f | 1740 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1741 | |
fa0d7e3d | 1742 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1743 | { |
fa0d7e3d | 1744 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1745 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1746 | } | |
1747 | ||
fa0d7e3d NP |
1748 | void nfs_destroy_inode(struct inode *inode) |
1749 | { | |
1750 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1751 | } | |
89d77c8f | 1752 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1753 | |
d75d5414 AM |
1754 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1755 | { | |
89d77c8f | 1756 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1757 | INIT_LIST_HEAD(&nfsi->open_states); |
1758 | nfsi->delegation = NULL; | |
1759 | nfsi->delegation_state = 0; | |
1760 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1761 | nfsi->layout = NULL; |
d75d5414 AM |
1762 | #endif |
1763 | } | |
f7b422b1 | 1764 | |
51cc5068 | 1765 | static void init_once(void *foo) |
1da177e4 LT |
1766 | { |
1767 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1768 | ||
a35afb83 | 1769 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1770 | INIT_LIST_HEAD(&nfsi->open_files); |
1771 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1772 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1773 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1774 | nfsi->npages = 0; |
ea2cf228 | 1775 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1776 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1777 | atomic_set(&nfsi->silly_count, 1); |
1778 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1779 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1780 | nfs4_init_once(nfsi); |
1da177e4 | 1781 | } |
20c2df83 | 1782 | |
f7b422b1 | 1783 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1784 | { |
1785 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1786 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1787 | 0, (SLAB_RECLAIM_ACCOUNT| |
1788 | SLAB_MEM_SPREAD), | |
20c2df83 | 1789 | init_once); |
1da177e4 LT |
1790 | if (nfs_inode_cachep == NULL) |
1791 | return -ENOMEM; | |
1792 | ||
1793 | return 0; | |
1794 | } | |
1795 | ||
266bee88 | 1796 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1797 | { |
8c0a8537 KS |
1798 | /* |
1799 | * Make sure all delayed rcu free inodes are flushed before we | |
1800 | * destroy cache. | |
1801 | */ | |
1802 | rcu_barrier(); | |
1a1d92c1 | 1803 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1804 | } |
1805 | ||
5746006f | 1806 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1807 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1808 | |
1809 | /* | |
1810 | * start up the nfsiod workqueue | |
1811 | */ | |
1812 | static int nfsiod_start(void) | |
1813 | { | |
1814 | struct workqueue_struct *wq; | |
1815 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1816 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1817 | if (wq == NULL) |
1818 | return -ENOMEM; | |
1819 | nfsiod_workqueue = wq; | |
1820 | return 0; | |
1821 | } | |
1822 | ||
1823 | /* | |
1824 | * Destroy the nfsiod workqueue | |
1825 | */ | |
1826 | static void nfsiod_stop(void) | |
1827 | { | |
1828 | struct workqueue_struct *wq; | |
1829 | ||
1830 | wq = nfsiod_workqueue; | |
1831 | if (wq == NULL) | |
1832 | return; | |
1833 | nfsiod_workqueue = NULL; | |
1834 | destroy_workqueue(wq); | |
1835 | } | |
1836 | ||
1b340d01 | 1837 | int nfs_net_id; |
9e2e74db | 1838 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1839 | |
1840 | static int nfs_net_init(struct net *net) | |
1841 | { | |
6b13168b | 1842 | nfs_clients_init(net); |
c8d74d9b | 1843 | return 0; |
1b340d01 SK |
1844 | } |
1845 | ||
1846 | static void nfs_net_exit(struct net *net) | |
1847 | { | |
28cd1b3f | 1848 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1849 | } |
1850 | ||
1851 | static struct pernet_operations nfs_net_ops = { | |
1852 | .init = nfs_net_init, | |
1853 | .exit = nfs_net_exit, | |
1854 | .id = &nfs_net_id, | |
1855 | .size = sizeof(struct nfs_net), | |
1856 | }; | |
1857 | ||
1da177e4 LT |
1858 | /* |
1859 | * Initialize NFS | |
1860 | */ | |
1861 | static int __init init_nfs_fs(void) | |
1862 | { | |
1863 | int err; | |
1864 | ||
1b340d01 | 1865 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1866 | if (err < 0) |
89d77c8f | 1867 | goto out9; |
e571cbf1 | 1868 | |
8ec442ae DH |
1869 | err = nfs_fscache_register(); |
1870 | if (err < 0) | |
89d77c8f | 1871 | goto out8; |
8ec442ae | 1872 | |
5746006f TM |
1873 | err = nfsiod_start(); |
1874 | if (err) | |
89d77c8f | 1875 | goto out7; |
5746006f | 1876 | |
6aaca566 DH |
1877 | err = nfs_fs_proc_init(); |
1878 | if (err) | |
89d77c8f | 1879 | goto out6; |
6aaca566 | 1880 | |
1da177e4 LT |
1881 | err = nfs_init_nfspagecache(); |
1882 | if (err) | |
89d77c8f | 1883 | goto out5; |
1da177e4 LT |
1884 | |
1885 | err = nfs_init_inodecache(); | |
1886 | if (err) | |
89d77c8f | 1887 | goto out4; |
1da177e4 LT |
1888 | |
1889 | err = nfs_init_readpagecache(); | |
1890 | if (err) | |
89d77c8f | 1891 | goto out3; |
1da177e4 LT |
1892 | |
1893 | err = nfs_init_writepagecache(); | |
1894 | if (err) | |
89d77c8f | 1895 | goto out2; |
1da177e4 | 1896 | |
1da177e4 LT |
1897 | err = nfs_init_directcache(); |
1898 | if (err) | |
89d77c8f | 1899 | goto out1; |
1da177e4 LT |
1900 | |
1901 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1902 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1903 | #endif |
f7b422b1 | 1904 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1905 | goto out0; |
1906 | ||
1da177e4 | 1907 | return 0; |
129d1977 | 1908 | out0: |
1da177e4 | 1909 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1910 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1911 | #endif |
1da177e4 | 1912 | nfs_destroy_directcache(); |
89d77c8f | 1913 | out1: |
129d1977 | 1914 | nfs_destroy_writepagecache(); |
89d77c8f | 1915 | out2: |
129d1977 | 1916 | nfs_destroy_readpagecache(); |
89d77c8f | 1917 | out3: |
129d1977 | 1918 | nfs_destroy_inodecache(); |
89d77c8f | 1919 | out4: |
129d1977 | 1920 | nfs_destroy_nfspagecache(); |
89d77c8f | 1921 | out5: |
129d1977 | 1922 | nfs_fs_proc_exit(); |
89d77c8f | 1923 | out6: |
129d1977 | 1924 | nfsiod_stop(); |
89d77c8f | 1925 | out7: |
129d1977 | 1926 | nfs_fscache_unregister(); |
89d77c8f | 1927 | out8: |
129d1977 | 1928 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 1929 | out9: |
1da177e4 LT |
1930 | return err; |
1931 | } | |
1932 | ||
1933 | static void __exit exit_nfs_fs(void) | |
1934 | { | |
1da177e4 | 1935 | nfs_destroy_directcache(); |
1da177e4 LT |
1936 | nfs_destroy_writepagecache(); |
1937 | nfs_destroy_readpagecache(); | |
1938 | nfs_destroy_inodecache(); | |
1939 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1940 | nfs_fscache_unregister(); |
1b340d01 | 1941 | unregister_pernet_subsys(&nfs_net_ops); |
1da177e4 | 1942 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1943 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1944 | #endif |
f7b422b1 | 1945 | unregister_nfs_fs(); |
6aaca566 | 1946 | nfs_fs_proc_exit(); |
5746006f | 1947 | nfsiod_stop(); |
1da177e4 LT |
1948 | } |
1949 | ||
1950 | /* Not quite true; I just maintain it */ | |
1951 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1952 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1953 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1954 | |
1955 | module_init(init_nfs_fs) | |
1956 | module_exit(exit_nfs_fs) |