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 | */ | |
c1221321 | 78 | int nfs_wait_bit_killable(struct wait_bit_key *key) |
72cb77f4 TM |
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 | |
912a108d N |
1005 | int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode) |
1006 | { | |
1007 | if (!(NFS_I(inode)->cache_validity & | |
1008 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
1009 | && !nfs_attribute_cache_expired(inode)) | |
1010 | return NFS_STALE(inode) ? -ESTALE : 0; | |
1011 | return -ECHILD; | |
1012 | } | |
1013 | ||
1cda707d | 1014 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1015 | { |
1016 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1017 | int ret; |
1018 | ||
717d44e8 | 1019 | if (mapping->nrpages != 0) { |
f8806c84 TM |
1020 | if (S_ISREG(inode->i_mode)) { |
1021 | ret = nfs_sync_mapping(mapping); | |
1022 | if (ret < 0) | |
1023 | return ret; | |
1024 | } | |
1025 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1026 | if (ret < 0) |
1027 | return ret; | |
1028 | } | |
d529ef83 JL |
1029 | if (S_ISDIR(inode->i_mode)) { |
1030 | spin_lock(&inode->i_lock); | |
717d44e8 | 1031 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1032 | spin_unlock(&inode->i_lock); |
1033 | } | |
717d44e8 | 1034 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1035 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1036 | |
1e8968c5 NV |
1037 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1038 | inode->i_sb->s_id, | |
1039 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1040 | return 0; |
1041 | } | |
1042 | ||
b4b1eadf TM |
1043 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
1044 | { | |
1045 | if (nfs_have_delegated_attributes(inode)) | |
1046 | return false; | |
1047 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
1048 | || nfs_attribute_timeout(inode) | |
1049 | || NFS_STALE(inode); | |
1050 | } | |
1051 | ||
717d44e8 TM |
1052 | /** |
1053 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1054 | * @inode - pointer to host inode | |
1055 | * @mapping - pointer to mapping | |
717d44e8 TM |
1056 | */ |
1057 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1058 | { | |
1059 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1060 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1061 | int ret = 0; |
dc59250c | 1062 | |
29418aa4 MG |
1063 | /* swapfiles are not supposed to be shared. */ |
1064 | if (IS_SWAPFILE(inode)) | |
1065 | goto out; | |
1066 | ||
b4b1eadf | 1067 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1068 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1069 | if (ret < 0) | |
1070 | goto out; | |
7d52e862 | 1071 | } |
d529ef83 JL |
1072 | |
1073 | /* | |
1074 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1075 | * invalidations that come in while we're shooting down the mappings | |
1076 | * are respected. But, that leaves a race window where one revalidator | |
1077 | * can clear the flag, and then another checks it before the mapping | |
1078 | * gets invalidated. Fix that by serializing access to this part of | |
1079 | * the function. | |
1080 | * | |
1081 | * At the same time, we need to allow other tasks to see whether we | |
1082 | * might be in the middle of invalidating the pages, so we only set | |
1083 | * the bit lock here if it looks like we're going to be doing that. | |
1084 | */ | |
1085 | for (;;) { | |
74316201 N |
1086 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1087 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1088 | if (ret) |
1089 | goto out; | |
17dfeb91 TM |
1090 | spin_lock(&inode->i_lock); |
1091 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1092 | spin_unlock(&inode->i_lock); | |
1093 | continue; | |
1094 | } | |
1095 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1096 | break; |
d529ef83 | 1097 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1098 | goto out; |
f4ce1299 TM |
1099 | } |
1100 | ||
17dfeb91 | 1101 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1102 | smp_wmb(); |
17dfeb91 TM |
1103 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1104 | spin_unlock(&inode->i_lock); | |
1105 | trace_nfs_invalidate_mapping_enter(inode); | |
1106 | ret = nfs_invalidate_mapping(inode, mapping); | |
1107 | trace_nfs_invalidate_mapping_exit(inode, ret); | |
1108 | ||
d529ef83 | 1109 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1110 | smp_mb__after_atomic(); |
d529ef83 | 1111 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1112 | out: |
44b11874 | 1113 | return ret; |
7d52e862 TM |
1114 | } |
1115 | ||
27dc1cd3 | 1116 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1117 | { |
1118 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1119 | unsigned long ret = 0; |
a895b4a1 | 1120 | |
9e6e70f8 TM |
1121 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1122 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1123 | && inode->i_version == fattr->pre_change_attr) { |
1124 | inode->i_version = fattr->change_attr; | |
70ca8852 | 1125 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1126 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1127 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1128 | } |
a895b4a1 | 1129 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1130 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1131 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1132 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1133 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1134 | ret |= NFS_INO_INVALID_ATTR; | |
1135 | } | |
9e6e70f8 TM |
1136 | |
1137 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1138 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1139 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1140 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1141 | if (S_ISDIR(inode->i_mode)) | |
6edf9609 | 1142 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1143 | ret |= NFS_INO_INVALID_ATTR; |
a895b4a1 | 1144 | } |
9e6e70f8 TM |
1145 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1146 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1147 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
1148 | && nfsi->npages == 0) { |
1149 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
1150 | ret |= NFS_INO_INVALID_ATTR; | |
1151 | } | |
de242c0b | 1152 | |
27dc1cd3 | 1153 | return ret; |
a895b4a1 TM |
1154 | } |
1155 | ||
1da177e4 | 1156 | /** |
33801147 | 1157 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1158 | * @inode - pointer to inode |
1159 | * @fattr - updated attributes | |
1160 | * | |
1161 | * Verifies the attribute cache. If we have just changed the attributes, | |
1162 | * so that fattr carries weak cache consistency data, then it may | |
1163 | * also update the ctime/mtime/change_attribute. | |
1164 | */ | |
33801147 | 1165 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1166 | { |
1167 | struct nfs_inode *nfsi = NFS_I(inode); | |
1168 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1169 | unsigned long invalid = 0; |
1da177e4 | 1170 | |
dc59250c | 1171 | |
01da47bd TM |
1172 | if (nfs_have_delegated_attributes(inode)) |
1173 | return 0; | |
ca62b9c3 | 1174 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1175 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1176 | return -EIO; | |
1177 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1178 | return -EIO; |
ca62b9c3 | 1179 | |
9e6e70f8 | 1180 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 1181 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 1182 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1183 | |
1da177e4 | 1184 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1185 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1186 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1187 | |
9e6e70f8 TM |
1188 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1189 | cur_size = i_size_read(inode); | |
1190 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1191 | if (cur_size != new_isize && nfsi->npages == 0) | |
1192 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1193 | } | |
1da177e4 LT |
1194 | |
1195 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1196 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1197 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1198 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1199 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1200 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1201 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1202 | |
1203 | /* Has the link count changed? */ | |
9e6e70f8 | 1204 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1205 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1206 | |
9e6e70f8 | 1207 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1208 | invalid |= NFS_INO_INVALID_ATIME; |
1209 | ||
1210 | if (invalid != 0) | |
6edf9609 | 1211 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1212 | |
33801147 | 1213 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1214 | return 0; |
1215 | } | |
1216 | ||
a10ad176 | 1217 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1218 | { |
9e6e70f8 TM |
1219 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1220 | return 0; | |
a10ad176 TM |
1221 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1222 | } | |
1223 | ||
1224 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1225 | { | |
9e6e70f8 TM |
1226 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1227 | return 0; | |
a10ad176 TM |
1228 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1229 | } | |
870a5be8 | 1230 | |
ae05f269 | 1231 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1232 | |
1233 | static unsigned long nfs_read_attr_generation_counter(void) | |
1234 | { | |
ae05f269 | 1235 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1236 | } |
1237 | ||
1238 | unsigned long nfs_inc_attr_generation_counter(void) | |
1239 | { | |
ae05f269 | 1240 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1241 | } |
1242 | ||
1243 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1244 | { | |
1245 | fattr->valid = 0; | |
1246 | fattr->time_start = jiffies; | |
1247 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1248 | fattr->owner_name = NULL; |
1249 | fattr->group_name = NULL; | |
4704f0e2 | 1250 | } |
ddda8e0a | 1251 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1252 | |
2d36bfde TM |
1253 | struct nfs_fattr *nfs_alloc_fattr(void) |
1254 | { | |
1255 | struct nfs_fattr *fattr; | |
1256 | ||
1257 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1258 | if (fattr != NULL) | |
1259 | nfs_fattr_init(fattr); | |
1260 | return fattr; | |
1261 | } | |
ddda8e0a | 1262 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1263 | |
1264 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1265 | { | |
1266 | struct nfs_fh *fh; | |
1267 | ||
1268 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1269 | if (fh != NULL) | |
1270 | fh->size = 0; | |
1271 | return fh; | |
1272 | } | |
ddda8e0a | 1273 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1274 | |
e27d359e | 1275 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1276 | /* |
1277 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1278 | * in the same way that wireshark does | |
1279 | * | |
1280 | * @fh: file handle | |
1281 | * | |
1282 | * For debugging only. | |
1283 | */ | |
1284 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1285 | { | |
1286 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1287 | * not on the result */ | |
1264a2f0 | 1288 | return nfs_fhandle_hash(fh); |
d8e0539e | 1289 | } |
9e6ee76d | 1290 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1291 | |
1292 | /* | |
20d27e92 CL |
1293 | * _nfs_display_fhandle - display an NFS file handle on the console |
1294 | * | |
1295 | * @fh: file handle to display | |
1296 | * @caption: display caption | |
1297 | * | |
1298 | * For debugging only. | |
1299 | */ | |
20d27e92 CL |
1300 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1301 | { | |
1302 | unsigned short i; | |
1303 | ||
fa68a1ba | 1304 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1305 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1306 | return; | |
1307 | } | |
1308 | ||
d8e0539e WAA |
1309 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1310 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1311 | for (i = 0; i < fh->size; i += 16) { |
1312 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1313 | ||
1314 | switch ((fh->size - i - 1) >> 2) { | |
1315 | case 0: | |
1316 | printk(KERN_DEFAULT " %08x\n", | |
1317 | be32_to_cpup(pos)); | |
1318 | break; | |
1319 | case 1: | |
1320 | printk(KERN_DEFAULT " %08x %08x\n", | |
1321 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1322 | break; | |
1323 | case 2: | |
1324 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1325 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1326 | be32_to_cpup(pos + 2)); | |
1327 | break; | |
1328 | default: | |
1329 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1330 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1331 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1332 | } | |
1333 | } | |
1334 | } | |
9e6ee76d | 1335 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1336 | #endif |
1337 | ||
a10ad176 TM |
1338 | /** |
1339 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1340 | * @inode - pointer to inode | |
1341 | * @fattr - attributes | |
1342 | * | |
1343 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1344 | * attributes got scheduled after another call carrying updated ones. | |
1345 | * | |
1346 | * To do so, the function first assumes that a more recent ctime means | |
1347 | * that the attributes in fattr are newer, however it also attempt to | |
1348 | * catch the case where ctime either didn't change, or went backwards | |
1349 | * (if someone reset the clock on the server) by looking at whether | |
1350 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1351 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1352 | * |
1353 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1354 | * more recent than the ones cached in the inode. | |
1355 | * | |
1356 | */ | |
1357 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1358 | { | |
1359 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1360 | ||
4704f0e2 | 1361 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1362 | nfs_ctime_need_update(inode, fattr) || |
1363 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1364 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1365 | } |
1366 | ||
d8c951c3 TM |
1367 | /* |
1368 | * Don't trust the change_attribute, mtime, ctime or size if | |
1369 | * a pnfs LAYOUTCOMMIT is outstanding | |
1370 | */ | |
1371 | static void nfs_inode_attrs_handle_layoutcommit(struct inode *inode, | |
1372 | struct nfs_fattr *fattr) | |
1373 | { | |
1374 | if (pnfs_layoutcommit_outstanding(inode)) | |
1375 | fattr->valid &= ~(NFS_ATTR_FATTR_CHANGE | | |
1376 | NFS_ATTR_FATTR_MTIME | | |
1377 | NFS_ATTR_FATTR_CTIME | | |
1378 | NFS_ATTR_FATTR_SIZE); | |
1379 | } | |
1380 | ||
a10ad176 TM |
1381 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1382 | { | |
f4ce1299 TM |
1383 | int ret; |
1384 | ||
1385 | trace_nfs_refresh_inode_enter(inode); | |
1386 | ||
d8c951c3 TM |
1387 | nfs_inode_attrs_handle_layoutcommit(inode, fattr); |
1388 | ||
a10ad176 | 1389 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1390 | ret = nfs_update_inode(inode, fattr); |
1391 | else | |
1392 | ret = nfs_check_inode_attributes(inode, fattr); | |
1393 | ||
1394 | trace_nfs_refresh_inode_exit(inode, ret); | |
1395 | return ret; | |
870a5be8 TM |
1396 | } |
1397 | ||
33801147 TM |
1398 | /** |
1399 | * nfs_refresh_inode - try to update the inode attribute cache | |
1400 | * @inode - pointer to inode | |
1401 | * @fattr - updated attributes | |
1402 | * | |
1403 | * Check that an RPC call that returned attributes has not overlapped with | |
1404 | * other recent updates of the inode metadata, then decide whether it is | |
1405 | * safe to do a full update of the inode attributes, or whether just to | |
1406 | * call nfs_check_inode_attributes. | |
1407 | */ | |
1408 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1409 | { | |
33801147 TM |
1410 | int status; |
1411 | ||
1412 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1413 | return 0; | |
1414 | spin_lock(&inode->i_lock); | |
870a5be8 | 1415 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1416 | spin_unlock(&inode->i_lock); |
ef79c097 | 1417 | |
33801147 TM |
1418 | return status; |
1419 | } | |
ddda8e0a | 1420 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1421 | |
d65f557f TM |
1422 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1423 | { | |
6edf9609 | 1424 | unsigned long invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
d65f557f | 1425 | |
6edf9609 TM |
1426 | if (S_ISDIR(inode->i_mode)) |
1427 | invalid |= NFS_INO_INVALID_DATA; | |
1428 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1429 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1430 | return 0; | |
1431 | return nfs_refresh_inode_locked(inode, fattr); | |
1432 | } | |
1433 | ||
decf491f TM |
1434 | /** |
1435 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1436 | * @inode - pointer to inode | |
1437 | * @fattr - updated attributes | |
1438 | * | |
1439 | * After an operation that has changed the inode metadata, mark the | |
1440 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1441 | * |
1442 | * NB: if the server didn't return any post op attributes, this | |
1443 | * function will force the retrieval of attributes before the next | |
1444 | * NFS request. Thus it should be used only for operations that | |
1445 | * are expected to change one or more attributes, to avoid | |
1446 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1447 | */ |
1448 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1449 | { | |
d65f557f | 1450 | int status; |
decf491f | 1451 | |
7668fdbe | 1452 | spin_lock(&inode->i_lock); |
d65f557f | 1453 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1454 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1455 | |
870a5be8 | 1456 | return status; |
decf491f | 1457 | } |
1c606fb7 | 1458 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1459 | |
70ca8852 TM |
1460 | /** |
1461 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1462 | * @inode - pointer to inode | |
1463 | * @fattr - updated attributes | |
1464 | * | |
1465 | * After an operation that has changed the inode metadata, mark the | |
1466 | * attribute cache as being invalid, then try to update it. Fake up | |
1467 | * weak cache consistency data, if none exist. | |
1468 | * | |
1469 | * This function is mainly designed to be used by the ->write_done() functions. | |
1470 | */ | |
1471 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1472 | { | |
d65f557f TM |
1473 | int status; |
1474 | ||
1475 | spin_lock(&inode->i_lock); | |
1476 | /* Don't do a WCC update if these attributes are already stale */ | |
1477 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1478 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1479 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1480 | | NFS_ATTR_FATTR_PRESIZE | |
1481 | | NFS_ATTR_FATTR_PREMTIME | |
1482 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1483 | goto out_noforce; |
1484 | } | |
9e6e70f8 TM |
1485 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1486 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1487 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1488 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1489 | } |
9e6e70f8 TM |
1490 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1491 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1492 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1493 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1494 | } | |
1495 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1496 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1497 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1498 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1499 | } | |
1500 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1501 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1502 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1503 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1504 | } |
d65f557f TM |
1505 | out_noforce: |
1506 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1507 | spin_unlock(&inode->i_lock); | |
1508 | return status; | |
70ca8852 | 1509 | } |
ddda8e0a | 1510 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1511 | |
1da177e4 LT |
1512 | /* |
1513 | * Many nfs protocol calls return the new file attributes after | |
1514 | * an operation. Here we update the inode to reflect the state | |
1515 | * of the server's inode. | |
1516 | * | |
1517 | * This is a bit tricky because we have to make sure all dirty pages | |
1518 | * have been sent off to the server before calling invalidate_inode_pages. | |
1519 | * To make sure no other process adds more write requests while we try | |
1520 | * our best to flush them, we make them sleep during the attribute refresh. | |
1521 | * | |
1522 | * A very similar scenario holds for the dir cache. | |
1523 | */ | |
24aa1fe6 | 1524 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1525 | { |
8b4bdcf8 | 1526 | struct nfs_server *server; |
1da177e4 | 1527 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1528 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1529 | unsigned long invalid = 0; |
3e7d950a | 1530 | unsigned long now = jiffies; |
62ab460c | 1531 | unsigned long save_cache_validity; |
1da177e4 | 1532 | |
1e8968c5 | 1533 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1534 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1535 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1536 | atomic_read(&inode->i_count), fattr->valid); |
1537 | ||
e73e6c9e MT |
1538 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1539 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1540 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1541 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1542 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1543 | (long long)fattr->fileid); | |
1544 | goto out_err; | |
1545 | } | |
1da177e4 LT |
1546 | |
1547 | /* | |
1548 | * Make sure the inode's type hasn't changed. | |
1549 | */ | |
e73e6c9e MT |
1550 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1551 | /* | |
1552 | * Big trouble! The inode has become a different object. | |
1553 | */ | |
1e8968c5 | 1554 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1555 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1556 | goto out_err; | |
1557 | } | |
1da177e4 | 1558 | |
8b4bdcf8 | 1559 | server = NFS_SERVER(inode); |
a0356862 | 1560 | /* Update the fsid? */ |
9e6e70f8 | 1561 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1562 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1563 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1564 | server->fsid = fattr->fsid; |
1565 | ||
1da177e4 LT |
1566 | /* |
1567 | * Update the read time so we don't revalidate too often. | |
1568 | */ | |
33801147 | 1569 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1570 | |
62ab460c TM |
1571 | save_cache_validity = nfsi->cache_validity; |
1572 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1573 | | NFS_INO_INVALID_ATIME | |
1574 | | NFS_INO_REVAL_FORCED | |
1575 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1576 | |
a895b4a1 | 1577 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1578 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1579 | |
47aabaa7 | 1580 | /* More cache consistency checks */ |
9e6e70f8 | 1581 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1582 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1583 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1584 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1585 | invalid |= NFS_INO_INVALID_ATTR |
1586 | | NFS_INO_INVALID_DATA | |
1587 | | NFS_INO_INVALID_ACCESS | |
1588 | | NFS_INO_INVALID_ACL | |
1589 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1590 | if (S_ISDIR(inode->i_mode)) |
1591 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1592 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1593 | } |
62ab460c | 1594 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
43b6535e | 1595 | nfsi->cache_validity |= save_cache_validity; |
9e6e70f8 TM |
1596 | |
1597 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1598 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c | 1599 | } else if (server->caps & NFS_CAP_MTIME) |
43b6535e TM |
1600 | nfsi->cache_validity |= save_cache_validity & |
1601 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1602 | | NFS_INO_REVAL_FORCED); |
1603 | ||
9e6e70f8 | 1604 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1605 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c | 1606 | } else if (server->caps & NFS_CAP_CTIME) |
43b6535e TM |
1607 | nfsi->cache_validity |= save_cache_validity & |
1608 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1609 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1610 | |
951a143b | 1611 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1612 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1613 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1614 | cur_isize = i_size_read(inode); | |
1615 | if (new_isize != cur_isize) { | |
1616 | /* Do we perhaps have any outstanding writes, or has | |
1617 | * the file grown beyond our last write? */ | |
d8c951c3 | 1618 | if ((nfsi->npages == 0) || new_isize > cur_isize) { |
9e6e70f8 TM |
1619 | i_size_write(inode, new_isize); |
1620 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
f2467b6f | 1621 | invalid &= ~NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 1622 | } |
60c16ea8 HJ |
1623 | dprintk("NFS: isize change on server for file %s/%ld " |
1624 | "(%Ld to %Ld)\n", | |
1625 | inode->i_sb->s_id, | |
1626 | inode->i_ino, | |
1627 | (long long)cur_isize, | |
1628 | (long long)new_isize); | |
1da177e4 | 1629 | } |
62ab460c | 1630 | } else |
43b6535e TM |
1631 | nfsi->cache_validity |= save_cache_validity & |
1632 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1633 | | NFS_INO_REVAL_PAGECACHE |
1634 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1635 | |
1da177e4 | 1636 | |
9e6e70f8 TM |
1637 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1638 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c | 1639 | else if (server->caps & NFS_CAP_ATIME) |
43b6535e TM |
1640 | nfsi->cache_validity |= save_cache_validity & |
1641 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1642 | | NFS_INO_REVAL_FORCED); |
1da177e4 | 1643 | |
9e6e70f8 TM |
1644 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1645 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1646 | umode_t newmode = inode->i_mode & S_IFMT; |
1647 | newmode |= fattr->mode & S_IALLUGO; | |
1648 | inode->i_mode = newmode; | |
9e6e70f8 | 1649 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1650 | } |
62ab460c | 1651 | } else if (server->caps & NFS_CAP_MODE) |
43b6535e TM |
1652 | nfsi->cache_validity |= save_cache_validity & |
1653 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1654 | | NFS_INO_INVALID_ACCESS |
1655 | | NFS_INO_INVALID_ACL | |
1656 | | NFS_INO_REVAL_FORCED); | |
1657 | ||
9e6e70f8 | 1658 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1659 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1660 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1661 | inode->i_uid = fattr->uid; | |
1662 | } | |
62ab460c | 1663 | } else if (server->caps & NFS_CAP_OWNER) |
43b6535e TM |
1664 | nfsi->cache_validity |= save_cache_validity & |
1665 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1666 | | NFS_INO_INVALID_ACCESS |
1667 | | NFS_INO_INVALID_ACL | |
1668 | | NFS_INO_REVAL_FORCED); | |
1669 | ||
9e6e70f8 | 1670 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1671 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1672 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1673 | inode->i_gid = fattr->gid; | |
1674 | } | |
62ab460c | 1675 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
43b6535e TM |
1676 | nfsi->cache_validity |= save_cache_validity & |
1677 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1678 | | NFS_INO_INVALID_ACCESS |
1679 | | NFS_INO_INVALID_ACL | |
1680 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1681 | |
9e6e70f8 TM |
1682 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1683 | if (inode->i_nlink != fattr->nlink) { | |
1684 | invalid |= NFS_INO_INVALID_ATTR; | |
1685 | if (S_ISDIR(inode->i_mode)) | |
1686 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1687 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1688 | } |
62ab460c | 1689 | } else if (server->caps & NFS_CAP_NLINK) |
43b6535e TM |
1690 | nfsi->cache_validity |= save_cache_validity & |
1691 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1692 | | NFS_INO_REVAL_FORCED); |
1da177e4 | 1693 | |
9e6e70f8 | 1694 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1695 | /* |
1696 | * report the blocks in 512byte units | |
1697 | */ | |
1698 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1699 | } |
9e6e70f8 TM |
1700 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1701 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1702 | |
1703 | /* Update attrtimeo value if we're out of the unstable period */ | |
fd1defc2 | 1704 | if (invalid & NFS_INO_INVALID_ATTR) { |
91d5b470 | 1705 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1706 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1707 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1708 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1709 | } else { |
64672d55 | 1710 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1711 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1712 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1713 | nfsi->attrtimeo_timestamp = now; | |
1714 | } | |
1da177e4 | 1715 | } |
f2115dc9 | 1716 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1717 | /* Don't invalidate the data if we were to blame */ |
1718 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1719 | || S_ISLNK(inode->i_mode))) | |
1720 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1721 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1722 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
6edf9609 | 1723 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 1724 | |
1da177e4 | 1725 | return 0; |
b37b03b7 | 1726 | out_err: |
1da177e4 LT |
1727 | /* |
1728 | * No need to worry about unhashing the dentry, as the | |
1729 | * lookup validation will know that the inode is bad. | |
1730 | * (But we fall through to invalidate the caches.) | |
1731 | */ | |
1732 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1733 | return -ESTALE; |
1734 | } | |
1735 | ||
f7b422b1 | 1736 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1737 | { |
1738 | struct nfs_inode *nfsi; | |
e94b1766 | 1739 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1740 | if (!nfsi) |
1741 | return NULL; | |
55296809 CL |
1742 | nfsi->flags = 0UL; |
1743 | nfsi->cache_validity = 0UL; | |
89d77c8f | 1744 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1745 | nfsi->nfs4_acl = NULL; |
1746 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1747 | return &nfsi->vfs_inode; |
1748 | } | |
89d77c8f | 1749 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1750 | |
fa0d7e3d | 1751 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1752 | { |
fa0d7e3d | 1753 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1754 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1755 | } | |
1756 | ||
fa0d7e3d NP |
1757 | void nfs_destroy_inode(struct inode *inode) |
1758 | { | |
1759 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1760 | } | |
89d77c8f | 1761 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1762 | |
d75d5414 AM |
1763 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1764 | { | |
89d77c8f | 1765 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1766 | INIT_LIST_HEAD(&nfsi->open_states); |
1767 | nfsi->delegation = NULL; | |
1768 | nfsi->delegation_state = 0; | |
1769 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1770 | nfsi->layout = NULL; |
d75d5414 AM |
1771 | #endif |
1772 | } | |
f7b422b1 | 1773 | |
51cc5068 | 1774 | static void init_once(void *foo) |
1da177e4 LT |
1775 | { |
1776 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1777 | ||
a35afb83 | 1778 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1779 | INIT_LIST_HEAD(&nfsi->open_files); |
1780 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1781 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1782 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1783 | nfsi->npages = 0; |
ea2cf228 | 1784 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1785 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1786 | atomic_set(&nfsi->silly_count, 1); |
1787 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1788 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1789 | nfs4_init_once(nfsi); |
1da177e4 | 1790 | } |
20c2df83 | 1791 | |
f7b422b1 | 1792 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1793 | { |
1794 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1795 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1796 | 0, (SLAB_RECLAIM_ACCOUNT| |
1797 | SLAB_MEM_SPREAD), | |
20c2df83 | 1798 | init_once); |
1da177e4 LT |
1799 | if (nfs_inode_cachep == NULL) |
1800 | return -ENOMEM; | |
1801 | ||
1802 | return 0; | |
1803 | } | |
1804 | ||
266bee88 | 1805 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1806 | { |
8c0a8537 KS |
1807 | /* |
1808 | * Make sure all delayed rcu free inodes are flushed before we | |
1809 | * destroy cache. | |
1810 | */ | |
1811 | rcu_barrier(); | |
1a1d92c1 | 1812 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1813 | } |
1814 | ||
5746006f | 1815 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1816 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1817 | |
1818 | /* | |
1819 | * start up the nfsiod workqueue | |
1820 | */ | |
1821 | static int nfsiod_start(void) | |
1822 | { | |
1823 | struct workqueue_struct *wq; | |
1824 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1825 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1826 | if (wq == NULL) |
1827 | return -ENOMEM; | |
1828 | nfsiod_workqueue = wq; | |
1829 | return 0; | |
1830 | } | |
1831 | ||
1832 | /* | |
1833 | * Destroy the nfsiod workqueue | |
1834 | */ | |
1835 | static void nfsiod_stop(void) | |
1836 | { | |
1837 | struct workqueue_struct *wq; | |
1838 | ||
1839 | wq = nfsiod_workqueue; | |
1840 | if (wq == NULL) | |
1841 | return; | |
1842 | nfsiod_workqueue = NULL; | |
1843 | destroy_workqueue(wq); | |
1844 | } | |
1845 | ||
1b340d01 | 1846 | int nfs_net_id; |
9e2e74db | 1847 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1848 | |
1849 | static int nfs_net_init(struct net *net) | |
1850 | { | |
6b13168b | 1851 | nfs_clients_init(net); |
65b38851 | 1852 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
1853 | } |
1854 | ||
1855 | static void nfs_net_exit(struct net *net) | |
1856 | { | |
65b38851 | 1857 | nfs_fs_proc_net_exit(net); |
28cd1b3f | 1858 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1859 | } |
1860 | ||
1861 | static struct pernet_operations nfs_net_ops = { | |
1862 | .init = nfs_net_init, | |
1863 | .exit = nfs_net_exit, | |
1864 | .id = &nfs_net_id, | |
1865 | .size = sizeof(struct nfs_net), | |
1866 | }; | |
1867 | ||
1da177e4 LT |
1868 | /* |
1869 | * Initialize NFS | |
1870 | */ | |
1871 | static int __init init_nfs_fs(void) | |
1872 | { | |
1873 | int err; | |
1874 | ||
1b340d01 | 1875 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1876 | if (err < 0) |
89d77c8f | 1877 | goto out9; |
e571cbf1 | 1878 | |
8ec442ae DH |
1879 | err = nfs_fscache_register(); |
1880 | if (err < 0) | |
89d77c8f | 1881 | goto out8; |
8ec442ae | 1882 | |
5746006f TM |
1883 | err = nfsiod_start(); |
1884 | if (err) | |
89d77c8f | 1885 | goto out7; |
5746006f | 1886 | |
6aaca566 DH |
1887 | err = nfs_fs_proc_init(); |
1888 | if (err) | |
89d77c8f | 1889 | goto out6; |
6aaca566 | 1890 | |
1da177e4 LT |
1891 | err = nfs_init_nfspagecache(); |
1892 | if (err) | |
89d77c8f | 1893 | goto out5; |
1da177e4 LT |
1894 | |
1895 | err = nfs_init_inodecache(); | |
1896 | if (err) | |
89d77c8f | 1897 | goto out4; |
1da177e4 LT |
1898 | |
1899 | err = nfs_init_readpagecache(); | |
1900 | if (err) | |
89d77c8f | 1901 | goto out3; |
1da177e4 LT |
1902 | |
1903 | err = nfs_init_writepagecache(); | |
1904 | if (err) | |
89d77c8f | 1905 | goto out2; |
1da177e4 | 1906 | |
1da177e4 LT |
1907 | err = nfs_init_directcache(); |
1908 | if (err) | |
89d77c8f | 1909 | goto out1; |
1da177e4 LT |
1910 | |
1911 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1912 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1913 | #endif |
f7b422b1 | 1914 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1915 | goto out0; |
1916 | ||
1da177e4 | 1917 | return 0; |
129d1977 | 1918 | out0: |
1da177e4 | 1919 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1920 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1921 | #endif |
1da177e4 | 1922 | nfs_destroy_directcache(); |
89d77c8f | 1923 | out1: |
129d1977 | 1924 | nfs_destroy_writepagecache(); |
89d77c8f | 1925 | out2: |
129d1977 | 1926 | nfs_destroy_readpagecache(); |
89d77c8f | 1927 | out3: |
129d1977 | 1928 | nfs_destroy_inodecache(); |
89d77c8f | 1929 | out4: |
129d1977 | 1930 | nfs_destroy_nfspagecache(); |
89d77c8f | 1931 | out5: |
129d1977 | 1932 | nfs_fs_proc_exit(); |
89d77c8f | 1933 | out6: |
129d1977 | 1934 | nfsiod_stop(); |
89d77c8f | 1935 | out7: |
129d1977 | 1936 | nfs_fscache_unregister(); |
89d77c8f | 1937 | out8: |
129d1977 | 1938 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 1939 | out9: |
1da177e4 LT |
1940 | return err; |
1941 | } | |
1942 | ||
1943 | static void __exit exit_nfs_fs(void) | |
1944 | { | |
1da177e4 | 1945 | nfs_destroy_directcache(); |
1da177e4 LT |
1946 | nfs_destroy_writepagecache(); |
1947 | nfs_destroy_readpagecache(); | |
1948 | nfs_destroy_inodecache(); | |
1949 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1950 | nfs_fscache_unregister(); |
1b340d01 | 1951 | unregister_pernet_subsys(&nfs_net_ops); |
1da177e4 | 1952 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1953 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1954 | #endif |
f7b422b1 | 1955 | unregister_nfs_fs(); |
6aaca566 | 1956 | nfs_fs_proc_exit(); |
5746006f | 1957 | nfsiod_stop(); |
1da177e4 LT |
1958 | } |
1959 | ||
1960 | /* Not quite true; I just maintain it */ | |
1961 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1962 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1963 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1964 | |
1965 | module_init(init_nfs_fs) | |
1966 | module_exit(exit_nfs_fs) |