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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/init.h> | |
e8edc6e0 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
1da177e4 | 35 | #include <linux/vfs.h> |
9cdb3883 MN |
36 | #include <linux/inet.h> |
37 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
3fa0b4e2 | 39 | #include <linux/compat.h> |
d310310c | 40 | #include <linux/freezer.h> |
1da177e4 | 41 | |
1da177e4 LT |
42 | #include <asm/uaccess.h> |
43 | ||
4ce79717 | 44 | #include "nfs4_fs.h" |
a72b4422 | 45 | #include "callback.h" |
1da177e4 | 46 | #include "delegation.h" |
d9ef5a8c | 47 | #include "iostat.h" |
f7b422b1 | 48 | #include "internal.h" |
8ec442ae | 49 | #include "fscache.h" |
e5e94017 | 50 | #include "pnfs.h" |
ab7017a3 | 51 | #include "nfs.h" |
1b340d01 | 52 | #include "netns.h" |
1da177e4 | 53 | |
f4ce1299 TM |
54 | #include "nfstrace.h" |
55 | ||
1da177e4 | 56 | #define NFSDBG_FACILITY NFSDBG_VFS |
1da177e4 | 57 | |
f43bf0be TM |
58 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
59 | ||
60 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 61 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 62 | |
1da177e4 | 63 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 64 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 65 | |
e18b890b | 66 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 67 | |
1da177e4 LT |
68 | static inline unsigned long |
69 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
70 | { | |
71 | return nfs_fileid_to_ino_t(fattr->fileid); | |
72 | } | |
73 | ||
72cb77f4 TM |
74 | /** |
75 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
76 | * @word: long word containing the bit lock | |
77 | */ | |
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 | 194 | } |
f4ac1674 | 195 | EXPORT_SYMBOL_GPL(nfs_zap_caches); |
ada70d94 | 196 | |
cd9ae2b6 TM |
197 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
198 | { | |
199 | if (mapping->nrpages != 0) { | |
200 | spin_lock(&inode->i_lock); | |
6edf9609 | 201 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
cd9ae2b6 TM |
202 | spin_unlock(&inode->i_lock); |
203 | } | |
204 | } | |
205 | ||
f41f7418 | 206 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
207 | { |
208 | void (*clear_acl_cache)(struct inode *); | |
209 | ||
210 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
211 | if (clear_acl_cache != NULL) | |
212 | clear_acl_cache(inode); | |
dc59250c | 213 | spin_lock(&inode->i_lock); |
55296809 | 214 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 215 | spin_unlock(&inode->i_lock); |
1da177e4 | 216 | } |
1c606fb7 | 217 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 218 | |
c4812998 TM |
219 | void nfs_invalidate_atime(struct inode *inode) |
220 | { | |
221 | spin_lock(&inode->i_lock); | |
6edf9609 | 222 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
c4812998 TM |
223 | spin_unlock(&inode->i_lock); |
224 | } | |
ddda8e0a | 225 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 226 | |
1da177e4 | 227 | /* |
b37b03b7 TM |
228 | * Invalidate, but do not unhash, the inode. |
229 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 230 | */ |
b37b03b7 | 231 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 232 | { |
3a10c30a | 233 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 234 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
235 | } |
236 | ||
237 | struct nfs_find_desc { | |
238 | struct nfs_fh *fh; | |
239 | struct nfs_fattr *fattr; | |
240 | }; | |
241 | ||
242 | /* | |
243 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
244 | * this, and re-exported directories (also seen in NFSv2) | |
245 | * we are forced to allow 2 different inodes to have the same | |
246 | * i_ino. | |
247 | */ | |
248 | static int | |
249 | nfs_find_actor(struct inode *inode, void *opaque) | |
250 | { | |
251 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
252 | struct nfs_fh *fh = desc->fh; | |
253 | struct nfs_fattr *fattr = desc->fattr; | |
254 | ||
255 | if (NFS_FILEID(inode) != fattr->fileid) | |
256 | return 0; | |
f6488c9b JL |
257 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
258 | return 0; | |
1da177e4 LT |
259 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
260 | return 0; | |
261 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
262 | return 0; | |
263 | return 1; | |
264 | } | |
265 | ||
266 | static int | |
267 | nfs_init_locked(struct inode *inode, void *opaque) | |
268 | { | |
269 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
270 | struct nfs_fattr *fattr = desc->fattr; | |
271 | ||
99fadcd7 | 272 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
273 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
274 | return 0; | |
275 | } | |
276 | ||
e058f70b | 277 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
fd1defc2 TM |
278 | static void nfs_clear_label_invalid(struct inode *inode) |
279 | { | |
280 | spin_lock(&inode->i_lock); | |
281 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; | |
282 | spin_unlock(&inode->i_lock); | |
283 | } | |
284 | ||
aa9c2669 DQ |
285 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
286 | struct nfs4_label *label) | |
287 | { | |
288 | int error; | |
289 | ||
290 | if (label == NULL) | |
291 | return; | |
292 | ||
aa9c2669 DQ |
293 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
294 | error = security_inode_notifysecctx(inode, label->label, | |
295 | label->len); | |
296 | if (error) | |
297 | printk(KERN_ERR "%s() %s %d " | |
298 | "security_inode_notifysecctx() %d\n", | |
299 | __func__, | |
300 | (char *)label->label, | |
301 | label->len, error); | |
fd1defc2 | 302 | nfs_clear_label_invalid(inode); |
aa9c2669 DQ |
303 | } |
304 | } | |
305 | ||
e058f70b SD |
306 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
307 | { | |
308 | struct nfs4_label *label = NULL; | |
309 | int minor_version = server->nfs_client->cl_minorversion; | |
310 | ||
311 | if (minor_version < 2) | |
312 | return label; | |
313 | ||
314 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
315 | return label; | |
316 | ||
317 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
318 | if (label == NULL) | |
319 | return ERR_PTR(-ENOMEM); | |
320 | ||
321 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
322 | if (label->label == NULL) { | |
323 | kfree(label); | |
324 | return ERR_PTR(-ENOMEM); | |
325 | } | |
326 | label->len = NFS4_MAXLABELLEN; | |
327 | ||
328 | return label; | |
329 | } | |
330 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 331 | #else |
829e57d7 | 332 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
aa9c2669 DQ |
333 | struct nfs4_label *label) |
334 | { | |
335 | } | |
e058f70b | 336 | #endif |
aa9c2669 | 337 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 338 | |
1da177e4 LT |
339 | /* |
340 | * This is our front-end to iget that looks up inodes by file handle | |
341 | * instead of inode number. | |
342 | */ | |
343 | struct inode * | |
1775fd3e | 344 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
345 | { |
346 | struct nfs_find_desc desc = { | |
347 | .fh = fh, | |
348 | .fattr = fattr | |
349 | }; | |
03f28e3a | 350 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
351 | unsigned long hash; |
352 | ||
7ebb9315 BS |
353 | nfs_attr_check_mountpoint(sb, fattr); |
354 | ||
2ef47eb1 AS |
355 | if (nfs_attr_use_mounted_on_fileid(fattr)) |
356 | fattr->fileid = fattr->mounted_on_fileid; | |
357 | else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) | |
1da177e4 | 358 | goto out_no_inode; |
9e6e70f8 | 359 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 360 | goto out_no_inode; |
1da177e4 LT |
361 | |
362 | hash = nfs_fattr_to_ino_t(fattr); | |
363 | ||
03f28e3a TM |
364 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
365 | if (inode == NULL) { | |
366 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 367 | goto out_no_inode; |
03f28e3a | 368 | } |
1da177e4 LT |
369 | |
370 | if (inode->i_state & I_NEW) { | |
371 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 372 | unsigned long now = jiffies; |
1da177e4 LT |
373 | |
374 | /* We set i_ino for the few things that still rely on it, | |
375 | * such as stat(2) */ | |
376 | inode->i_ino = hash; | |
377 | ||
378 | /* We can't support update_atime(), since the server will reset it */ | |
379 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
380 | inode->i_mode = fattr->mode; | |
62ab460c TM |
381 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
382 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
6edf9609 | 383 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
1da177e4 LT |
384 | /* Why so? Because we want revalidate for devices/FIFOs, and |
385 | * that's precisely what we have in nfs_file_inode_operations. | |
386 | */ | |
8fa5c000 | 387 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 388 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 389 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 | 390 | inode->i_data.a_ops = &nfs_file_aops; |
1da177e4 | 391 | } else if (S_ISDIR(inode->i_mode)) { |
8fa5c000 | 392 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 393 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 394 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 395 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
396 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
397 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
398 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
399 | inode->i_op = &nfs_referral_inode_operations; | |
400 | else | |
401 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 402 | inode->i_fop = NULL; |
36d43a43 | 403 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 404 | } |
1da177e4 LT |
405 | } else if (S_ISLNK(inode->i_mode)) |
406 | inode->i_op = &nfs_symlink_inode_operations; | |
407 | else | |
408 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
409 | ||
9e6e70f8 TM |
410 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
411 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
412 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 413 | inode->i_version = 0; |
9e6e70f8 | 414 | inode->i_size = 0; |
6d6b77f1 | 415 | clear_nlink(inode); |
9ff593c4 EB |
416 | inode->i_uid = make_kuid(&init_user_ns, -2); |
417 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
418 | inode->i_blocks = 0; |
419 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
420 | nfsi->write_io = 0; |
421 | nfsi->read_io = 0; | |
9e6e70f8 | 422 | |
33801147 | 423 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 424 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
425 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
426 | inode->i_atime = fattr->atime; | |
62ab460c | 427 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
6edf9609 | 428 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
429 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
430 | inode->i_mtime = fattr->mtime; | |
62ab460c | 431 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
6edf9609 | 432 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
433 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
434 | inode->i_ctime = fattr->ctime; | |
62ab460c | 435 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
6edf9609 | 436 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 | 437 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 438 | inode->i_version = fattr->change_attr; |
62ab460c | 439 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
6edf9609 | 440 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
441 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
442 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 443 | else |
6edf9609 TM |
444 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
445 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 | 446 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 447 | set_nlink(inode, fattr->nlink); |
62ab460c | 448 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
6edf9609 | 449 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
450 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
451 | inode->i_uid = fattr->uid; | |
62ab460c | 452 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
6edf9609 | 453 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
454 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
455 | inode->i_gid = fattr->gid; | |
62ab460c | 456 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
6edf9609 | 457 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
458 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
459 | inode->i_blocks = fattr->du.nfs2.blocks; | |
460 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
461 | /* |
462 | * report the blocks in 512byte units | |
463 | */ | |
464 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 465 | } |
aa9c2669 DQ |
466 | |
467 | nfs_setsecurity(inode, fattr, label); | |
468 | ||
1da177e4 | 469 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 470 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 471 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 472 | |
f1fe29b4 | 473 | nfs_fscache_init_inode(inode); |
ef79c097 | 474 | |
1da177e4 LT |
475 | unlock_new_inode(inode); |
476 | } else | |
477 | nfs_refresh_inode(inode, fattr); | |
1e8968c5 | 478 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 479 | inode->i_sb->s_id, |
1e8968c5 | 480 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 481 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
482 | atomic_read(&inode->i_count)); |
483 | ||
484 | out: | |
485 | return inode; | |
486 | ||
487 | out_no_inode: | |
03f28e3a | 488 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
489 | goto out; |
490 | } | |
89d77c8f | 491 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 492 | |
536e43d1 | 493 | #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 |
494 | |
495 | int | |
496 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
497 | { | |
498 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
499 | struct nfs_fattr *fattr; |
500 | int error = -ENOMEM; | |
1da177e4 | 501 | |
91d5b470 CL |
502 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
503 | ||
188b95dd JL |
504 | /* skip mode change if it's just for clearing setuid/setgid */ |
505 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
506 | attr->ia_valid &= ~ATTR_MODE; | |
507 | ||
1da177e4 | 508 | if (attr->ia_valid & ATTR_SIZE) { |
3a7ed3ff OS |
509 | loff_t i_size; |
510 | ||
08a899d5 CH |
511 | BUG_ON(!S_ISREG(inode->i_mode)); |
512 | ||
3a7ed3ff OS |
513 | i_size = i_size_read(inode); |
514 | if (attr->ia_size == i_size) | |
1da177e4 | 515 | attr->ia_valid &= ~ATTR_SIZE; |
3a7ed3ff OS |
516 | else if (attr->ia_size < i_size && IS_SWAPFILE(inode)) |
517 | return -ETXTBSY; | |
1da177e4 LT |
518 | } |
519 | ||
520 | /* Optimization: if the end result is no change, don't RPC */ | |
521 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 522 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
523 | return 0; |
524 | ||
f4ce1299 TM |
525 | trace_nfs_setattr_enter(inode); |
526 | ||
755c1e20 | 527 | /* Write all dirty data */ |
1d59d61f TM |
528 | if (S_ISREG(inode->i_mode)) { |
529 | nfs_inode_dio_wait(inode); | |
e1552e19 | 530 | nfs_wb_all(inode); |
1d59d61f | 531 | } |
987f8dfc TM |
532 | |
533 | fattr = nfs_alloc_fattr(); | |
534 | if (fattr == NULL) | |
535 | goto out; | |
642ac549 TM |
536 | /* |
537 | * Return any delegations if we're going to change ACLs | |
538 | */ | |
539 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 540 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 541 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 542 | if (error == 0) |
aa9c2669 | 543 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
544 | nfs_free_fattr(fattr); |
545 | out: | |
f4ce1299 | 546 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
547 | return error; |
548 | } | |
ddda8e0a | 549 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 550 | |
a3d01454 TM |
551 | /** |
552 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
553 | * @inode: inode of the file used | |
554 | * @offset: file offset to start truncating | |
555 | * | |
556 | * This is a copy of the common vmtruncate, but with the locking | |
557 | * corrected to take into account the fact that NFS requires | |
558 | * inode->i_size to be updated under the inode->i_lock. | |
f044636d | 559 | * Note: must be called with inode->i_lock held! |
a3d01454 TM |
560 | */ |
561 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
562 | { | |
c08d3b0e | 563 | int err; |
a3d01454 | 564 | |
c08d3b0e | 565 | err = inode_newsize_ok(inode, offset); |
566 | if (err) | |
567 | goto out; | |
a3d01454 | 568 | |
c08d3b0e | 569 | i_size_write(inode, offset); |
6edf9609 TM |
570 | /* Optimisation */ |
571 | if (offset == 0) | |
572 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA; | |
c08d3b0e | 573 | |
f044636d | 574 | spin_unlock(&inode->i_lock); |
7caef267 | 575 | truncate_pagecache(inode, offset); |
f044636d | 576 | spin_lock(&inode->i_lock); |
c08d3b0e | 577 | out: |
578 | return err; | |
a3d01454 TM |
579 | } |
580 | ||
65e4308d TM |
581 | /** |
582 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
583 | * @inode: pointer to struct inode | |
584 | * @attr: pointer to struct iattr | |
585 | * | |
586 | * Note: we do this in the *proc.c in order to ensure that | |
587 | * it works for things like exclusive creates too. | |
588 | */ | |
f044636d TM |
589 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, |
590 | struct nfs_fattr *fattr) | |
65e4308d | 591 | { |
f044636d TM |
592 | /* Barrier: bump the attribute generation count. */ |
593 | nfs_fattr_set_barrier(fattr); | |
594 | ||
595 | spin_lock(&inode->i_lock); | |
596 | NFS_I(inode)->attr_gencount = fattr->gencount; | |
65e4308d | 597 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
1da177e4 | 598 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
599 | int mode = attr->ia_mode & S_IALLUGO; |
600 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
601 | inode->i_mode = mode; |
602 | } | |
603 | if ((attr->ia_valid & ATTR_UID) != 0) | |
604 | inode->i_uid = attr->ia_uid; | |
605 | if ((attr->ia_valid & ATTR_GID) != 0) | |
606 | inode->i_gid = attr->ia_gid; | |
6edf9609 TM |
607 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
608 | | NFS_INO_INVALID_ACL); | |
65e4308d TM |
609 | } |
610 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 611 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 612 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 613 | } |
f044636d TM |
614 | nfs_update_inode(inode, fattr); |
615 | spin_unlock(&inode->i_lock); | |
1da177e4 | 616 | } |
ddda8e0a | 617 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 618 | |
311324ad TM |
619 | static void nfs_request_parent_use_readdirplus(struct dentry *dentry) |
620 | { | |
621 | struct dentry *parent; | |
622 | ||
623 | parent = dget_parent(dentry); | |
624 | nfs_force_use_readdirplus(parent->d_inode); | |
625 | dput(parent); | |
626 | } | |
627 | ||
628 | static bool nfs_need_revalidate_inode(struct inode *inode) | |
629 | { | |
630 | if (NFS_I(inode)->cache_validity & | |
631 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
632 | return true; | |
633 | if (nfs_attribute_cache_expired(inode)) | |
634 | return true; | |
635 | return false; | |
636 | } | |
637 | ||
1da177e4 LT |
638 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
639 | { | |
640 | struct inode *inode = dentry->d_inode; | |
55296809 | 641 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
16caf5b6 | 642 | int err = 0; |
1da177e4 | 643 | |
f4ce1299 | 644 | trace_nfs_getattr_enter(inode); |
acdc53b2 | 645 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 646 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 647 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
648 | err = filemap_write_and_wait(inode->i_mapping); |
649 | if (err) | |
650 | goto out; | |
28c494c5 | 651 | } |
fc33a7bb CH |
652 | |
653 | /* | |
654 | * We may force a getattr if the user cares about atime. | |
655 | * | |
656 | * Note that we only have to check the vfsmount flags here: | |
657 | * - NFS always sets S_NOATIME by so checking it would give a | |
658 | * bogus result | |
659 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
660 | * no point in checking those. | |
661 | */ | |
662 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
663 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 664 | need_atime = 0; |
fc33a7bb | 665 | |
311324ad TM |
666 | if (need_atime || nfs_need_revalidate_inode(inode)) { |
667 | struct nfs_server *server = NFS_SERVER(inode); | |
668 | ||
669 | if (server->caps & NFS_CAP_READDIRPLUS) | |
670 | nfs_request_parent_use_readdirplus(dentry); | |
671 | err = __nfs_revalidate_inode(server, inode); | |
672 | } | |
4e769b93 | 673 | if (!err) { |
1da177e4 | 674 | generic_fillattr(inode, stat); |
f43bf0be | 675 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 676 | } |
acdc53b2 | 677 | out: |
f4ce1299 | 678 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
679 | return err; |
680 | } | |
ddda8e0a | 681 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 682 | |
f11ac8db TM |
683 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
684 | { | |
685 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
686 | l_ctx->lockowner.l_owner = current->files; |
687 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 688 | INIT_LIST_HEAD(&l_ctx->list); |
577b4232 | 689 | nfs_iocounter_init(&l_ctx->io_count); |
f11ac8db TM |
690 | } |
691 | ||
692 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
693 | { | |
8c86899f TM |
694 | struct nfs_lock_context *head = &ctx->lock_context; |
695 | struct nfs_lock_context *pos = head; | |
f11ac8db | 696 | |
8c86899f | 697 | do { |
2a369153 | 698 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 699 | continue; |
2a369153 | 700 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
701 | continue; |
702 | atomic_inc(&pos->count); | |
703 | return pos; | |
8c86899f | 704 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
705 | return NULL; |
706 | } | |
707 | ||
708 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
709 | { | |
710 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 711 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
712 | |
713 | spin_lock(&inode->i_lock); | |
714 | res = __nfs_find_lock_context(ctx); | |
715 | if (res == NULL) { | |
716 | spin_unlock(&inode->i_lock); | |
717 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
718 | if (new == NULL) | |
b3c54de6 | 719 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
720 | nfs_init_lock_context(new); |
721 | spin_lock(&inode->i_lock); | |
722 | res = __nfs_find_lock_context(ctx); | |
723 | if (res == NULL) { | |
724 | list_add_tail(&new->list, &ctx->lock_context.list); | |
725 | new->open_context = ctx; | |
726 | res = new; | |
727 | new = NULL; | |
728 | } | |
729 | } | |
730 | spin_unlock(&inode->i_lock); | |
731 | kfree(new); | |
732 | return res; | |
733 | } | |
1c6dcbe5 | 734 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
735 | |
736 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
737 | { | |
738 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 739 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
740 | |
741 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
742 | return; | |
743 | list_del(&l_ctx->list); | |
744 | spin_unlock(&inode->i_lock); | |
745 | kfree(l_ctx); | |
746 | } | |
1c6dcbe5 | 747 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 748 | |
7fe5c398 TM |
749 | /** |
750 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
751 | * @ctx: pointer to context | |
752 | * @is_sync: is this a synchronous close | |
753 | * | |
754 | * always ensure that the attributes are up to date if we're mounted | |
755 | * with close-to-open semantics | |
756 | */ | |
757 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
758 | { | |
759 | struct inode *inode; | |
760 | struct nfs_server *server; | |
761 | ||
762 | if (!(ctx->mode & FMODE_WRITE)) | |
763 | return; | |
764 | if (!is_sync) | |
765 | return; | |
3d4ff43d | 766 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
767 | if (!list_empty(&NFS_I(inode)->open_files)) |
768 | return; | |
769 | server = NFS_SERVER(inode); | |
770 | if (server->flags & NFS_MOUNT_NOCTO) | |
771 | return; | |
772 | nfs_revalidate_inode(server, inode); | |
773 | } | |
ddda8e0a | 774 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 775 | |
5ede7b1c | 776 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
777 | { |
778 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
779 | struct rpc_cred *cred = rpc_lookup_cred(); |
780 | if (IS_ERR(cred)) | |
781 | return ERR_CAST(cred); | |
1da177e4 | 782 | |
f52720ca | 783 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
784 | if (!ctx) { |
785 | put_rpccred(cred); | |
786 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 787 | } |
5ede7b1c AV |
788 | nfs_sb_active(dentry->d_sb); |
789 | ctx->dentry = dget(dentry); | |
790 | ctx->cred = cred; | |
791 | ctx->state = NULL; | |
792 | ctx->mode = f_mode; | |
793 | ctx->flags = 0; | |
794 | ctx->error = 0; | |
795 | nfs_init_lock_context(&ctx->lock_context); | |
796 | ctx->lock_context.open_context = ctx; | |
797 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 798 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
799 | return ctx; |
800 | } | |
89d77c8f | 801 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
802 | |
803 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
804 | { | |
805 | if (ctx != NULL) | |
f11ac8db | 806 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
807 | return ctx; |
808 | } | |
89d77c8f | 809 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 810 | |
7fe5c398 | 811 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 812 | { |
3d4ff43d AV |
813 | struct inode *inode = ctx->dentry->d_inode; |
814 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 815 | |
5c78f58e | 816 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
817 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
818 | return; | |
819 | list_del(&ctx->list); | |
820 | spin_unlock(&inode->i_lock); | |
ef84303e | 821 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 822 | return; |
5c78f58e TM |
823 | if (inode != NULL) |
824 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
825 | if (ctx->cred != NULL) |
826 | put_rpccred(ctx->cred); | |
3d4ff43d | 827 | dput(ctx->dentry); |
322b2b90 | 828 | nfs_sb_deactive(sb); |
82be417a | 829 | kfree(ctx->mdsthreshold); |
3bec63db TM |
830 | kfree(ctx); |
831 | } | |
832 | ||
a49c3c77 TM |
833 | void put_nfs_open_context(struct nfs_open_context *ctx) |
834 | { | |
835 | __put_nfs_open_context(ctx, 0); | |
836 | } | |
89d77c8f | 837 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 838 | |
1da177e4 LT |
839 | /* |
840 | * Ensure that mmap has a recent RPC credential for use when writing out | |
841 | * shared pages | |
842 | */ | |
c45ffdd2 | 843 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 844 | { |
c45ffdd2 | 845 | struct inode *inode = ctx->dentry->d_inode; |
1da177e4 LT |
846 | struct nfs_inode *nfsi = NFS_I(inode); |
847 | ||
1da177e4 LT |
848 | spin_lock(&inode->i_lock); |
849 | list_add(&ctx->list, &nfsi->open_files); | |
850 | spin_unlock(&inode->i_lock); | |
851 | } | |
c45ffdd2 TM |
852 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
853 | ||
854 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
855 | { | |
856 | filp->private_data = get_nfs_open_context(ctx); | |
857 | if (list_empty(&ctx->list)) | |
858 | nfs_inode_attach_open_context(ctx); | |
859 | } | |
89d77c8f | 860 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 861 | |
d530838b TM |
862 | /* |
863 | * Given an inode, search for an open context with the desired characteristics | |
864 | */ | |
dc0b027d | 865 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
866 | { |
867 | struct nfs_inode *nfsi = NFS_I(inode); | |
868 | struct nfs_open_context *pos, *ctx = NULL; | |
869 | ||
870 | spin_lock(&inode->i_lock); | |
871 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
872 | if (cred != NULL && pos->cred != cred) |
873 | continue; | |
1544fa0f TM |
874 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
875 | continue; | |
876 | ctx = get_nfs_open_context(pos); | |
877 | break; | |
1da177e4 LT |
878 | } |
879 | spin_unlock(&inode->i_lock); | |
880 | return ctx; | |
881 | } | |
882 | ||
b92dccf6 | 883 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 884 | { |
cd3758e3 | 885 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
886 | |
887 | if (ctx) { | |
c45ffdd2 TM |
888 | struct inode *inode = ctx->dentry->d_inode; |
889 | ||
1da177e4 LT |
890 | filp->private_data = NULL; |
891 | spin_lock(&inode->i_lock); | |
892 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
893 | spin_unlock(&inode->i_lock); | |
f895c53f | 894 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
895 | } |
896 | } | |
897 | ||
898 | /* | |
899 | * These allocate and release file read/write context information. | |
900 | */ | |
901 | int nfs_open(struct inode *inode, struct file *filp) | |
902 | { | |
903 | struct nfs_open_context *ctx; | |
1da177e4 | 904 | |
5ede7b1c AV |
905 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
906 | if (IS_ERR(ctx)) | |
907 | return PTR_ERR(ctx); | |
1da177e4 LT |
908 | nfs_file_set_open_context(filp, ctx); |
909 | put_nfs_open_context(ctx); | |
f1fe29b4 | 910 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
911 | return 0; |
912 | } | |
913 | ||
914 | int nfs_release(struct inode *inode, struct file *filp) | |
915 | { | |
1da177e4 LT |
916 | nfs_file_clear_open_context(filp); |
917 | return 0; | |
918 | } | |
919 | ||
920 | /* | |
921 | * This function is called whenever some part of NFS notices that | |
922 | * the cached attributes have to be refreshed. | |
923 | */ | |
924 | int | |
925 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
926 | { | |
927 | int status = -ESTALE; | |
1775fd3e | 928 | struct nfs4_label *label = NULL; |
a3cba2aa | 929 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 930 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 931 | |
1e8968c5 NV |
932 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
933 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 934 | |
f4ce1299 TM |
935 | trace_nfs_revalidate_inode_enter(inode); |
936 | ||
85233a7a | 937 | if (is_bad_inode(inode)) |
691beb13 | 938 | goto out; |
1da177e4 | 939 | if (NFS_STALE(inode)) |
412d582e | 940 | goto out; |
7fdc49c4 | 941 | |
a3cba2aa TM |
942 | status = -ENOMEM; |
943 | fattr = nfs_alloc_fattr(); | |
944 | if (fattr == NULL) | |
945 | goto out; | |
946 | ||
691beb13 | 947 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
948 | |
949 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
950 | if (IS_ERR(label)) { | |
951 | status = PTR_ERR(label); | |
952 | goto out; | |
953 | } | |
954 | ||
1775fd3e | 955 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 | 956 | if (status != 0) { |
1e8968c5 | 957 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 958 | inode->i_sb->s_id, |
1e8968c5 | 959 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
960 | if (status == -ESTALE) { |
961 | nfs_zap_caches(inode); | |
962 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 963 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 964 | } |
14c43f76 | 965 | goto err_out; |
1da177e4 LT |
966 | } |
967 | ||
a3cba2aa | 968 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 969 | if (status) { |
1e8968c5 | 970 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 971 | inode->i_sb->s_id, |
1e8968c5 | 972 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 973 | goto err_out; |
1da177e4 | 974 | } |
55296809 | 975 | |
24aa1fe6 | 976 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 977 | nfs_zap_acl_cache(inode); |
55296809 | 978 | |
3da580aa JL |
979 | nfs_setsecurity(inode, fattr, label); |
980 | ||
1e8968c5 | 981 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 982 | inode->i_sb->s_id, |
1e8968c5 | 983 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 984 | |
14c43f76 DQ |
985 | err_out: |
986 | nfs4_label_free(label); | |
987 | out: | |
a3cba2aa | 988 | nfs_free_fattr(fattr); |
f4ce1299 | 989 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
990 | return status; |
991 | } | |
992 | ||
993 | int nfs_attribute_timeout(struct inode *inode) | |
994 | { | |
995 | struct nfs_inode *nfsi = NFS_I(inode); | |
996 | ||
d7cf8dd0 TM |
997 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
998 | } | |
999 | ||
43f291cd | 1000 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 1001 | { |
b4d2314b | 1002 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 1003 | return 0; |
d7cf8dd0 | 1004 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
1005 | } |
1006 | ||
1007 | /** | |
1008 | * nfs_revalidate_inode - Revalidate the inode attributes | |
1009 | * @server - pointer to nfs_server struct | |
1010 | * @inode - pointer to inode struct | |
1011 | * | |
1012 | * Updates inode attribute information by retrieving the data from the server. | |
1013 | */ | |
1014 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1015 | { | |
311324ad | 1016 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1017 | return NFS_STALE(inode) ? -ESTALE : 0; |
1018 | return __nfs_revalidate_inode(server, inode); | |
1019 | } | |
1c606fb7 | 1020 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1021 | |
912a108d N |
1022 | int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode) |
1023 | { | |
1024 | if (!(NFS_I(inode)->cache_validity & | |
1025 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
1026 | && !nfs_attribute_cache_expired(inode)) | |
1027 | return NFS_STALE(inode) ? -ESTALE : 0; | |
1028 | return -ECHILD; | |
1029 | } | |
1030 | ||
1cda707d | 1031 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1032 | { |
1033 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1034 | int ret; |
1035 | ||
717d44e8 | 1036 | if (mapping->nrpages != 0) { |
f8806c84 | 1037 | if (S_ISREG(inode->i_mode)) { |
ef070dcb | 1038 | unmap_mapping_range(mapping, 0, 0, 0); |
f8806c84 TM |
1039 | ret = nfs_sync_mapping(mapping); |
1040 | if (ret < 0) | |
1041 | return ret; | |
1042 | } | |
1043 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1044 | if (ret < 0) |
1045 | return ret; | |
1046 | } | |
d529ef83 JL |
1047 | if (S_ISDIR(inode->i_mode)) { |
1048 | spin_lock(&inode->i_lock); | |
717d44e8 | 1049 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1050 | spin_unlock(&inode->i_lock); |
1051 | } | |
717d44e8 | 1052 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1053 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1054 | |
1e8968c5 NV |
1055 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1056 | inode->i_sb->s_id, | |
1057 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1058 | return 0; |
1059 | } | |
1060 | ||
b4b1eadf TM |
1061 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
1062 | { | |
1063 | if (nfs_have_delegated_attributes(inode)) | |
1064 | return false; | |
1065 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
1066 | || nfs_attribute_timeout(inode) | |
1067 | || NFS_STALE(inode); | |
1068 | } | |
1069 | ||
717d44e8 | 1070 | /** |
874f9463 | 1071 | * __nfs_revalidate_mapping - Revalidate the pagecache |
717d44e8 TM |
1072 | * @inode - pointer to host inode |
1073 | * @mapping - pointer to mapping | |
874f9463 | 1074 | * @may_lock - take inode->i_mutex? |
717d44e8 | 1075 | */ |
874f9463 TM |
1076 | static int __nfs_revalidate_mapping(struct inode *inode, |
1077 | struct address_space *mapping, | |
1078 | bool may_lock) | |
717d44e8 TM |
1079 | { |
1080 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1081 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1082 | int ret = 0; |
dc59250c | 1083 | |
29418aa4 MG |
1084 | /* swapfiles are not supposed to be shared. */ |
1085 | if (IS_SWAPFILE(inode)) | |
1086 | goto out; | |
1087 | ||
b4b1eadf | 1088 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1089 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1090 | if (ret < 0) | |
1091 | goto out; | |
7d52e862 | 1092 | } |
d529ef83 JL |
1093 | |
1094 | /* | |
1095 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1096 | * invalidations that come in while we're shooting down the mappings | |
1097 | * are respected. But, that leaves a race window where one revalidator | |
1098 | * can clear the flag, and then another checks it before the mapping | |
1099 | * gets invalidated. Fix that by serializing access to this part of | |
1100 | * the function. | |
1101 | * | |
1102 | * At the same time, we need to allow other tasks to see whether we | |
1103 | * might be in the middle of invalidating the pages, so we only set | |
1104 | * the bit lock here if it looks like we're going to be doing that. | |
1105 | */ | |
1106 | for (;;) { | |
74316201 N |
1107 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1108 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1109 | if (ret) |
1110 | goto out; | |
17dfeb91 TM |
1111 | spin_lock(&inode->i_lock); |
1112 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1113 | spin_unlock(&inode->i_lock); | |
1114 | continue; | |
1115 | } | |
1116 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1117 | break; |
d529ef83 | 1118 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1119 | goto out; |
f4ce1299 TM |
1120 | } |
1121 | ||
17dfeb91 | 1122 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1123 | smp_wmb(); |
17dfeb91 TM |
1124 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1125 | spin_unlock(&inode->i_lock); | |
1126 | trace_nfs_invalidate_mapping_enter(inode); | |
874f9463 TM |
1127 | if (may_lock) { |
1128 | mutex_lock(&inode->i_mutex); | |
1129 | ret = nfs_invalidate_mapping(inode, mapping); | |
1130 | mutex_unlock(&inode->i_mutex); | |
1131 | } else | |
1132 | ret = nfs_invalidate_mapping(inode, mapping); | |
17dfeb91 TM |
1133 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1134 | ||
d529ef83 | 1135 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1136 | smp_mb__after_atomic(); |
d529ef83 | 1137 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1138 | out: |
44b11874 | 1139 | return ret; |
7d52e862 TM |
1140 | } |
1141 | ||
874f9463 TM |
1142 | /** |
1143 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1144 | * @inode - pointer to host inode | |
1145 | * @mapping - pointer to mapping | |
1146 | */ | |
1147 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1148 | { | |
1149 | return __nfs_revalidate_mapping(inode, mapping, false); | |
1150 | } | |
1151 | ||
1152 | /** | |
1153 | * nfs_revalidate_mapping_protected - Revalidate the pagecache | |
1154 | * @inode - pointer to host inode | |
1155 | * @mapping - pointer to mapping | |
1156 | * | |
1157 | * Differs from nfs_revalidate_mapping() in that it grabs the inode->i_mutex | |
1158 | * while invalidating the mapping. | |
1159 | */ | |
1160 | int nfs_revalidate_mapping_protected(struct inode *inode, struct address_space *mapping) | |
1161 | { | |
1162 | return __nfs_revalidate_mapping(inode, mapping, true); | |
1163 | } | |
1164 | ||
27dc1cd3 | 1165 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1166 | { |
1167 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1168 | unsigned long ret = 0; |
a895b4a1 | 1169 | |
9e6e70f8 TM |
1170 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1171 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1172 | && inode->i_version == fattr->pre_change_attr) { |
1173 | inode->i_version = fattr->change_attr; | |
70ca8852 | 1174 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1175 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1176 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1177 | } |
a895b4a1 | 1178 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1179 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1180 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1181 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1182 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1183 | ret |= NFS_INO_INVALID_ATTR; | |
1184 | } | |
9e6e70f8 TM |
1185 | |
1186 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1187 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1188 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1189 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1190 | if (S_ISDIR(inode->i_mode)) | |
6edf9609 | 1191 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1192 | ret |= NFS_INO_INVALID_ATTR; |
a895b4a1 | 1193 | } |
9e6e70f8 TM |
1194 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1195 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1196 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
cb1410c7 | 1197 | && nfsi->nrequests == 0) { |
27dc1cd3 TM |
1198 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
1199 | ret |= NFS_INO_INVALID_ATTR; | |
1200 | } | |
de242c0b | 1201 | |
27dc1cd3 | 1202 | return ret; |
a895b4a1 TM |
1203 | } |
1204 | ||
1da177e4 | 1205 | /** |
33801147 | 1206 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1207 | * @inode - pointer to inode |
1208 | * @fattr - updated attributes | |
1209 | * | |
1210 | * Verifies the attribute cache. If we have just changed the attributes, | |
1211 | * so that fattr carries weak cache consistency data, then it may | |
1212 | * also update the ctime/mtime/change_attribute. | |
1213 | */ | |
33801147 | 1214 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1215 | { |
1216 | struct nfs_inode *nfsi = NFS_I(inode); | |
1217 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1218 | unsigned long invalid = 0; |
1da177e4 | 1219 | |
dc59250c | 1220 | |
01da47bd TM |
1221 | if (nfs_have_delegated_attributes(inode)) |
1222 | return 0; | |
ca62b9c3 | 1223 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1224 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1225 | return -EIO; | |
1226 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1227 | return -EIO; |
ca62b9c3 | 1228 | |
9e6e70f8 | 1229 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 1230 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 1231 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1232 | |
1da177e4 | 1233 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1234 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1235 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1236 | |
9e6e70f8 TM |
1237 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1238 | cur_size = i_size_read(inode); | |
1239 | new_isize = nfs_size_to_loff_t(fattr->size); | |
cb1410c7 | 1240 | if (cur_size != new_isize && nfsi->nrequests == 0) |
9e6e70f8 TM |
1241 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1242 | } | |
1da177e4 LT |
1243 | |
1244 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1245 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1246 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1247 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1248 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1249 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1250 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1251 | |
1252 | /* Has the link count changed? */ | |
9e6e70f8 | 1253 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1254 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1255 | |
9e6e70f8 | 1256 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1257 | invalid |= NFS_INO_INVALID_ATIME; |
1258 | ||
1259 | if (invalid != 0) | |
6edf9609 | 1260 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1261 | |
33801147 | 1262 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1263 | return 0; |
1264 | } | |
1265 | ||
a10ad176 | 1266 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1267 | { |
9e6e70f8 TM |
1268 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1269 | return 0; | |
a10ad176 TM |
1270 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1271 | } | |
1272 | ||
ae05f269 | 1273 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1274 | |
1275 | static unsigned long nfs_read_attr_generation_counter(void) | |
1276 | { | |
ae05f269 | 1277 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1278 | } |
1279 | ||
1280 | unsigned long nfs_inc_attr_generation_counter(void) | |
1281 | { | |
ae05f269 | 1282 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 | 1283 | } |
3235b403 | 1284 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
4704f0e2 TM |
1285 | |
1286 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1287 | { | |
1288 | fattr->valid = 0; | |
1289 | fattr->time_start = jiffies; | |
1290 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1291 | fattr->owner_name = NULL; |
1292 | fattr->group_name = NULL; | |
4704f0e2 | 1293 | } |
ddda8e0a | 1294 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1295 | |
140e049c TM |
1296 | /** |
1297 | * nfs_fattr_set_barrier | |
1298 | * @fattr: attributes | |
1299 | * | |
1300 | * Used to set a barrier after an attribute was updated. This | |
1301 | * barrier ensures that older attributes from RPC calls that may | |
1302 | * have raced with our update cannot clobber these new values. | |
1303 | * Note that you are still responsible for ensuring that other | |
1304 | * operations which change the attribute on the server do not | |
1305 | * collide. | |
1306 | */ | |
1307 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) | |
1308 | { | |
1309 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1310 | } | |
1311 | ||
2d36bfde TM |
1312 | struct nfs_fattr *nfs_alloc_fattr(void) |
1313 | { | |
1314 | struct nfs_fattr *fattr; | |
1315 | ||
1316 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1317 | if (fattr != NULL) | |
1318 | nfs_fattr_init(fattr); | |
1319 | return fattr; | |
1320 | } | |
ddda8e0a | 1321 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1322 | |
1323 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1324 | { | |
1325 | struct nfs_fh *fh; | |
1326 | ||
1327 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1328 | if (fh != NULL) | |
1329 | fh->size = 0; | |
1330 | return fh; | |
1331 | } | |
ddda8e0a | 1332 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1333 | |
e27d359e | 1334 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1335 | /* |
1336 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1337 | * in the same way that wireshark does | |
1338 | * | |
1339 | * @fh: file handle | |
1340 | * | |
1341 | * For debugging only. | |
1342 | */ | |
1343 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1344 | { | |
1345 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1346 | * not on the result */ | |
1264a2f0 | 1347 | return nfs_fhandle_hash(fh); |
d8e0539e | 1348 | } |
9e6ee76d | 1349 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1350 | |
1351 | /* | |
20d27e92 CL |
1352 | * _nfs_display_fhandle - display an NFS file handle on the console |
1353 | * | |
1354 | * @fh: file handle to display | |
1355 | * @caption: display caption | |
1356 | * | |
1357 | * For debugging only. | |
1358 | */ | |
20d27e92 CL |
1359 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1360 | { | |
1361 | unsigned short i; | |
1362 | ||
fa68a1ba | 1363 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1364 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1365 | return; | |
1366 | } | |
1367 | ||
d8e0539e WAA |
1368 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1369 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1370 | for (i = 0; i < fh->size; i += 16) { |
1371 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1372 | ||
1373 | switch ((fh->size - i - 1) >> 2) { | |
1374 | case 0: | |
1375 | printk(KERN_DEFAULT " %08x\n", | |
1376 | be32_to_cpup(pos)); | |
1377 | break; | |
1378 | case 1: | |
1379 | printk(KERN_DEFAULT " %08x %08x\n", | |
1380 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1381 | break; | |
1382 | case 2: | |
1383 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1384 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1385 | be32_to_cpup(pos + 2)); | |
1386 | break; | |
1387 | default: | |
1388 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1389 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1390 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1391 | } | |
1392 | } | |
1393 | } | |
9e6ee76d | 1394 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1395 | #endif |
1396 | ||
a10ad176 TM |
1397 | /** |
1398 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1399 | * @inode - pointer to inode | |
1400 | * @fattr - attributes | |
1401 | * | |
1402 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1403 | * attributes got scheduled after another call carrying updated ones. | |
1404 | * | |
1405 | * To do so, the function first assumes that a more recent ctime means | |
1406 | * that the attributes in fattr are newer, however it also attempt to | |
1407 | * catch the case where ctime either didn't change, or went backwards | |
1408 | * (if someone reset the clock on the server) by looking at whether | |
1409 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1410 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1411 | * |
1412 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1413 | * more recent than the ones cached in the inode. | |
1414 | * | |
1415 | */ | |
1416 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1417 | { | |
1418 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1419 | ||
4704f0e2 | 1420 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 | 1421 | nfs_ctime_need_update(inode, fattr) || |
4704f0e2 | 1422 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1423 | } |
1424 | ||
d8c951c3 TM |
1425 | /* |
1426 | * Don't trust the change_attribute, mtime, ctime or size if | |
1427 | * a pnfs LAYOUTCOMMIT is outstanding | |
1428 | */ | |
1429 | static void nfs_inode_attrs_handle_layoutcommit(struct inode *inode, | |
1430 | struct nfs_fattr *fattr) | |
1431 | { | |
1432 | if (pnfs_layoutcommit_outstanding(inode)) | |
1433 | fattr->valid &= ~(NFS_ATTR_FATTR_CHANGE | | |
1434 | NFS_ATTR_FATTR_MTIME | | |
1435 | NFS_ATTR_FATTR_CTIME | | |
1436 | NFS_ATTR_FATTR_SIZE); | |
1437 | } | |
1438 | ||
a10ad176 TM |
1439 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1440 | { | |
f4ce1299 TM |
1441 | int ret; |
1442 | ||
1443 | trace_nfs_refresh_inode_enter(inode); | |
1444 | ||
d8c951c3 TM |
1445 | nfs_inode_attrs_handle_layoutcommit(inode, fattr); |
1446 | ||
a10ad176 | 1447 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1448 | ret = nfs_update_inode(inode, fattr); |
1449 | else | |
1450 | ret = nfs_check_inode_attributes(inode, fattr); | |
1451 | ||
1452 | trace_nfs_refresh_inode_exit(inode, ret); | |
1453 | return ret; | |
870a5be8 TM |
1454 | } |
1455 | ||
33801147 TM |
1456 | /** |
1457 | * nfs_refresh_inode - try to update the inode attribute cache | |
1458 | * @inode - pointer to inode | |
1459 | * @fattr - updated attributes | |
1460 | * | |
1461 | * Check that an RPC call that returned attributes has not overlapped with | |
1462 | * other recent updates of the inode metadata, then decide whether it is | |
1463 | * safe to do a full update of the inode attributes, or whether just to | |
1464 | * call nfs_check_inode_attributes. | |
1465 | */ | |
1466 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1467 | { | |
33801147 TM |
1468 | int status; |
1469 | ||
1470 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1471 | return 0; | |
1472 | spin_lock(&inode->i_lock); | |
870a5be8 | 1473 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1474 | spin_unlock(&inode->i_lock); |
ef79c097 | 1475 | |
33801147 TM |
1476 | return status; |
1477 | } | |
ddda8e0a | 1478 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1479 | |
d65f557f TM |
1480 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1481 | { | |
6edf9609 | 1482 | unsigned long invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
d65f557f | 1483 | |
6edf9609 TM |
1484 | if (S_ISDIR(inode->i_mode)) |
1485 | invalid |= NFS_INO_INVALID_DATA; | |
1486 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1487 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1488 | return 0; | |
1489 | return nfs_refresh_inode_locked(inode, fattr); | |
1490 | } | |
1491 | ||
decf491f TM |
1492 | /** |
1493 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1494 | * @inode - pointer to inode | |
1495 | * @fattr - updated attributes | |
1496 | * | |
1497 | * After an operation that has changed the inode metadata, mark the | |
1498 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1499 | * |
1500 | * NB: if the server didn't return any post op attributes, this | |
1501 | * function will force the retrieval of attributes before the next | |
1502 | * NFS request. Thus it should be used only for operations that | |
1503 | * are expected to change one or more attributes, to avoid | |
1504 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1505 | */ |
1506 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1507 | { | |
d65f557f | 1508 | int status; |
decf491f | 1509 | |
7668fdbe | 1510 | spin_lock(&inode->i_lock); |
92d64e47 | 1511 | nfs_fattr_set_barrier(fattr); |
d65f557f | 1512 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1513 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1514 | |
870a5be8 | 1515 | return status; |
decf491f | 1516 | } |
1c606fb7 | 1517 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1518 | |
70ca8852 | 1519 | /** |
a08a8cd3 | 1520 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
70ca8852 TM |
1521 | * @inode - pointer to inode |
1522 | * @fattr - updated attributes | |
1523 | * | |
1524 | * After an operation that has changed the inode metadata, mark the | |
1525 | * attribute cache as being invalid, then try to update it. Fake up | |
1526 | * weak cache consistency data, if none exist. | |
1527 | * | |
1528 | * This function is mainly designed to be used by the ->write_done() functions. | |
1529 | */ | |
a08a8cd3 | 1530 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
70ca8852 | 1531 | { |
d65f557f TM |
1532 | int status; |
1533 | ||
d65f557f TM |
1534 | /* Don't do a WCC update if these attributes are already stale */ |
1535 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1536 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1537 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1538 | | NFS_ATTR_FATTR_PRESIZE | |
1539 | | NFS_ATTR_FATTR_PREMTIME | |
1540 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1541 | goto out_noforce; |
1542 | } | |
9e6e70f8 TM |
1543 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1544 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1545 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1546 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1547 | } |
9e6e70f8 TM |
1548 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1549 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1550 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1551 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1552 | } | |
1553 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1554 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1555 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1556 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1557 | } | |
1558 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1559 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1560 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1561 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1562 | } |
d65f557f TM |
1563 | out_noforce: |
1564 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
a08a8cd3 TM |
1565 | return status; |
1566 | } | |
1567 | ||
1568 | /** | |
1569 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1570 | * @inode - pointer to inode | |
1571 | * @fattr - updated attributes | |
1572 | * | |
1573 | * After an operation that has changed the inode metadata, mark the | |
1574 | * attribute cache as being invalid, then try to update it. Fake up | |
1575 | * weak cache consistency data, if none exist. | |
1576 | * | |
1577 | * This function is mainly designed to be used by the ->write_done() functions. | |
1578 | */ | |
1579 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1580 | { | |
1581 | int status; | |
1582 | ||
1583 | spin_lock(&inode->i_lock); | |
8f8ba1d7 | 1584 | nfs_fattr_set_barrier(fattr); |
a08a8cd3 | 1585 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
d65f557f TM |
1586 | spin_unlock(&inode->i_lock); |
1587 | return status; | |
70ca8852 | 1588 | } |
ddda8e0a | 1589 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1590 | |
1da177e4 LT |
1591 | /* |
1592 | * Many nfs protocol calls return the new file attributes after | |
1593 | * an operation. Here we update the inode to reflect the state | |
1594 | * of the server's inode. | |
1595 | * | |
1596 | * This is a bit tricky because we have to make sure all dirty pages | |
1597 | * have been sent off to the server before calling invalidate_inode_pages. | |
1598 | * To make sure no other process adds more write requests while we try | |
1599 | * our best to flush them, we make them sleep during the attribute refresh. | |
1600 | * | |
1601 | * A very similar scenario holds for the dir cache. | |
1602 | */ | |
24aa1fe6 | 1603 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1604 | { |
8b4bdcf8 | 1605 | struct nfs_server *server; |
1da177e4 | 1606 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1607 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1608 | unsigned long invalid = 0; |
3e7d950a | 1609 | unsigned long now = jiffies; |
62ab460c | 1610 | unsigned long save_cache_validity; |
1da177e4 | 1611 | |
1e8968c5 | 1612 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1613 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1614 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1615 | atomic_read(&inode->i_count), fattr->valid); |
1616 | ||
e73e6c9e MT |
1617 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1618 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1619 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1620 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1621 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1622 | (long long)fattr->fileid); | |
1623 | goto out_err; | |
1624 | } | |
1da177e4 LT |
1625 | |
1626 | /* | |
1627 | * Make sure the inode's type hasn't changed. | |
1628 | */ | |
e73e6c9e MT |
1629 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1630 | /* | |
1631 | * Big trouble! The inode has become a different object. | |
1632 | */ | |
1e8968c5 | 1633 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1634 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1635 | goto out_err; | |
1636 | } | |
1da177e4 | 1637 | |
8b4bdcf8 | 1638 | server = NFS_SERVER(inode); |
a0356862 | 1639 | /* Update the fsid? */ |
9e6e70f8 | 1640 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1641 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1642 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1643 | server->fsid = fattr->fsid; |
1644 | ||
1da177e4 LT |
1645 | /* |
1646 | * Update the read time so we don't revalidate too often. | |
1647 | */ | |
33801147 | 1648 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1649 | |
62ab460c TM |
1650 | save_cache_validity = nfsi->cache_validity; |
1651 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1652 | | NFS_INO_INVALID_ATIME | |
1653 | | NFS_INO_REVAL_FORCED | |
1654 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1655 | |
a895b4a1 | 1656 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1657 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1658 | |
47aabaa7 | 1659 | /* More cache consistency checks */ |
9e6e70f8 | 1660 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1661 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1662 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1663 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1664 | invalid |= NFS_INO_INVALID_ATTR |
1665 | | NFS_INO_INVALID_DATA | |
1666 | | NFS_INO_INVALID_ACCESS | |
1667 | | NFS_INO_INVALID_ACL | |
1668 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1669 | if (S_ISDIR(inode->i_mode)) |
1670 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1671 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1672 | } |
62ab460c | 1673 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
43b6535e | 1674 | nfsi->cache_validity |= save_cache_validity; |
9e6e70f8 TM |
1675 | |
1676 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1677 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c | 1678 | } else if (server->caps & NFS_CAP_MTIME) |
43b6535e TM |
1679 | nfsi->cache_validity |= save_cache_validity & |
1680 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1681 | | NFS_INO_REVAL_FORCED); |
1682 | ||
9e6e70f8 | 1683 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1684 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c | 1685 | } else if (server->caps & NFS_CAP_CTIME) |
43b6535e TM |
1686 | nfsi->cache_validity |= save_cache_validity & |
1687 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1688 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1689 | |
951a143b | 1690 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1691 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1692 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1693 | cur_isize = i_size_read(inode); | |
1694 | if (new_isize != cur_isize) { | |
1695 | /* Do we perhaps have any outstanding writes, or has | |
1696 | * the file grown beyond our last write? */ | |
cb1410c7 | 1697 | if ((nfsi->nrequests == 0) || new_isize > cur_isize) { |
9e6e70f8 TM |
1698 | i_size_write(inode, new_isize); |
1699 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
f2467b6f | 1700 | invalid &= ~NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 1701 | } |
60c16ea8 HJ |
1702 | dprintk("NFS: isize change on server for file %s/%ld " |
1703 | "(%Ld to %Ld)\n", | |
1704 | inode->i_sb->s_id, | |
1705 | inode->i_ino, | |
1706 | (long long)cur_isize, | |
1707 | (long long)new_isize); | |
1da177e4 | 1708 | } |
62ab460c | 1709 | } else |
43b6535e TM |
1710 | nfsi->cache_validity |= save_cache_validity & |
1711 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1712 | | NFS_INO_REVAL_PAGECACHE |
1713 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1714 | |
1da177e4 | 1715 | |
9e6e70f8 TM |
1716 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1717 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c | 1718 | else if (server->caps & NFS_CAP_ATIME) |
43b6535e TM |
1719 | nfsi->cache_validity |= save_cache_validity & |
1720 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1721 | | NFS_INO_REVAL_FORCED); |
1da177e4 | 1722 | |
9e6e70f8 TM |
1723 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1724 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1725 | umode_t newmode = inode->i_mode & S_IFMT; |
1726 | newmode |= fattr->mode & S_IALLUGO; | |
1727 | inode->i_mode = newmode; | |
9e6e70f8 | 1728 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1729 | } |
62ab460c | 1730 | } else if (server->caps & NFS_CAP_MODE) |
43b6535e TM |
1731 | nfsi->cache_validity |= save_cache_validity & |
1732 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1733 | | NFS_INO_INVALID_ACCESS |
1734 | | NFS_INO_INVALID_ACL | |
1735 | | NFS_INO_REVAL_FORCED); | |
1736 | ||
9e6e70f8 | 1737 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1738 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1739 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1740 | inode->i_uid = fattr->uid; | |
1741 | } | |
62ab460c | 1742 | } else if (server->caps & NFS_CAP_OWNER) |
43b6535e TM |
1743 | nfsi->cache_validity |= save_cache_validity & |
1744 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1745 | | NFS_INO_INVALID_ACCESS |
1746 | | NFS_INO_INVALID_ACL | |
1747 | | NFS_INO_REVAL_FORCED); | |
1748 | ||
9e6e70f8 | 1749 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1750 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1751 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1752 | inode->i_gid = fattr->gid; | |
1753 | } | |
62ab460c | 1754 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
43b6535e TM |
1755 | nfsi->cache_validity |= save_cache_validity & |
1756 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1757 | | NFS_INO_INVALID_ACCESS |
1758 | | NFS_INO_INVALID_ACL | |
1759 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1760 | |
9e6e70f8 TM |
1761 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1762 | if (inode->i_nlink != fattr->nlink) { | |
1763 | invalid |= NFS_INO_INVALID_ATTR; | |
1764 | if (S_ISDIR(inode->i_mode)) | |
1765 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1766 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1767 | } |
62ab460c | 1768 | } else if (server->caps & NFS_CAP_NLINK) |
43b6535e TM |
1769 | nfsi->cache_validity |= save_cache_validity & |
1770 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1771 | | NFS_INO_REVAL_FORCED); |
1da177e4 | 1772 | |
9e6e70f8 | 1773 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1774 | /* |
1775 | * report the blocks in 512byte units | |
1776 | */ | |
1777 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1778 | } |
9e6e70f8 TM |
1779 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1780 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1781 | |
1782 | /* Update attrtimeo value if we're out of the unstable period */ | |
fd1defc2 | 1783 | if (invalid & NFS_INO_INVALID_ATTR) { |
91d5b470 | 1784 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1785 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1786 | nfsi->attrtimeo_timestamp = now; |
f5062003 | 1787 | /* Set barrier to be more recent than all outstanding updates */ |
4704f0e2 | 1788 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1789 | } else { |
64672d55 | 1790 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1791 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1792 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1793 | nfsi->attrtimeo_timestamp = now; | |
1794 | } | |
f5062003 TM |
1795 | /* Set the barrier to be more recent than this fattr */ |
1796 | if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) | |
1797 | nfsi->attr_gencount = fattr->gencount; | |
1da177e4 | 1798 | } |
f2115dc9 | 1799 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1800 | /* Don't invalidate the data if we were to blame */ |
1801 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1802 | || S_ISLNK(inode->i_mode))) | |
1803 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1804 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1805 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
6edf9609 | 1806 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 1807 | |
1da177e4 | 1808 | return 0; |
b37b03b7 | 1809 | out_err: |
1da177e4 LT |
1810 | /* |
1811 | * No need to worry about unhashing the dentry, as the | |
1812 | * lookup validation will know that the inode is bad. | |
1813 | * (But we fall through to invalidate the caches.) | |
1814 | */ | |
1815 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1816 | return -ESTALE; |
1817 | } | |
1818 | ||
f7b422b1 | 1819 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1820 | { |
1821 | struct nfs_inode *nfsi; | |
e94b1766 | 1822 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1823 | if (!nfsi) |
1824 | return NULL; | |
55296809 CL |
1825 | nfsi->flags = 0UL; |
1826 | nfsi->cache_validity = 0UL; | |
89d77c8f | 1827 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1828 | nfsi->nfs4_acl = NULL; |
1829 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1830 | return &nfsi->vfs_inode; |
1831 | } | |
89d77c8f | 1832 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1833 | |
fa0d7e3d | 1834 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1835 | { |
fa0d7e3d | 1836 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1837 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1838 | } | |
1839 | ||
fa0d7e3d NP |
1840 | void nfs_destroy_inode(struct inode *inode) |
1841 | { | |
1842 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1843 | } | |
89d77c8f | 1844 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1845 | |
d75d5414 AM |
1846 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1847 | { | |
89d77c8f | 1848 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1849 | INIT_LIST_HEAD(&nfsi->open_states); |
1850 | nfsi->delegation = NULL; | |
d75d5414 | 1851 | init_rwsem(&nfsi->rwsem); |
e5e94017 | 1852 | nfsi->layout = NULL; |
d75d5414 AM |
1853 | #endif |
1854 | } | |
f7b422b1 | 1855 | |
51cc5068 | 1856 | static void init_once(void *foo) |
1da177e4 LT |
1857 | { |
1858 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1859 | ||
a35afb83 | 1860 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1861 | INIT_LIST_HEAD(&nfsi->open_files); |
1862 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1863 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1864 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
cb1410c7 | 1865 | nfsi->nrequests = 0; |
ea2cf228 | 1866 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1867 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1868 | atomic_set(&nfsi->silly_count, 1); |
1869 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1870 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1871 | nfs4_init_once(nfsi); |
1da177e4 | 1872 | } |
20c2df83 | 1873 | |
f7b422b1 | 1874 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1875 | { |
1876 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1877 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1878 | 0, (SLAB_RECLAIM_ACCOUNT| |
1879 | SLAB_MEM_SPREAD), | |
20c2df83 | 1880 | init_once); |
1da177e4 LT |
1881 | if (nfs_inode_cachep == NULL) |
1882 | return -ENOMEM; | |
1883 | ||
1884 | return 0; | |
1885 | } | |
1886 | ||
266bee88 | 1887 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1888 | { |
8c0a8537 KS |
1889 | /* |
1890 | * Make sure all delayed rcu free inodes are flushed before we | |
1891 | * destroy cache. | |
1892 | */ | |
1893 | rcu_barrier(); | |
1a1d92c1 | 1894 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1895 | } |
1896 | ||
5746006f | 1897 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1898 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1899 | |
1900 | /* | |
1901 | * start up the nfsiod workqueue | |
1902 | */ | |
1903 | static int nfsiod_start(void) | |
1904 | { | |
1905 | struct workqueue_struct *wq; | |
1906 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1907 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1908 | if (wq == NULL) |
1909 | return -ENOMEM; | |
1910 | nfsiod_workqueue = wq; | |
1911 | return 0; | |
1912 | } | |
1913 | ||
1914 | /* | |
1915 | * Destroy the nfsiod workqueue | |
1916 | */ | |
1917 | static void nfsiod_stop(void) | |
1918 | { | |
1919 | struct workqueue_struct *wq; | |
1920 | ||
1921 | wq = nfsiod_workqueue; | |
1922 | if (wq == NULL) | |
1923 | return; | |
1924 | nfsiod_workqueue = NULL; | |
1925 | destroy_workqueue(wq); | |
1926 | } | |
1927 | ||
1b340d01 | 1928 | int nfs_net_id; |
9e2e74db | 1929 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1930 | |
1931 | static int nfs_net_init(struct net *net) | |
1932 | { | |
6b13168b | 1933 | nfs_clients_init(net); |
65b38851 | 1934 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
1935 | } |
1936 | ||
1937 | static void nfs_net_exit(struct net *net) | |
1938 | { | |
65b38851 | 1939 | nfs_fs_proc_net_exit(net); |
28cd1b3f | 1940 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1941 | } |
1942 | ||
1943 | static struct pernet_operations nfs_net_ops = { | |
1944 | .init = nfs_net_init, | |
1945 | .exit = nfs_net_exit, | |
1946 | .id = &nfs_net_id, | |
1947 | .size = sizeof(struct nfs_net), | |
1948 | }; | |
1949 | ||
1da177e4 LT |
1950 | /* |
1951 | * Initialize NFS | |
1952 | */ | |
1953 | static int __init init_nfs_fs(void) | |
1954 | { | |
1955 | int err; | |
1956 | ||
1b340d01 | 1957 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1958 | if (err < 0) |
89d77c8f | 1959 | goto out9; |
e571cbf1 | 1960 | |
8ec442ae DH |
1961 | err = nfs_fscache_register(); |
1962 | if (err < 0) | |
89d77c8f | 1963 | goto out8; |
8ec442ae | 1964 | |
5746006f TM |
1965 | err = nfsiod_start(); |
1966 | if (err) | |
89d77c8f | 1967 | goto out7; |
5746006f | 1968 | |
6aaca566 DH |
1969 | err = nfs_fs_proc_init(); |
1970 | if (err) | |
89d77c8f | 1971 | goto out6; |
6aaca566 | 1972 | |
1da177e4 LT |
1973 | err = nfs_init_nfspagecache(); |
1974 | if (err) | |
89d77c8f | 1975 | goto out5; |
1da177e4 LT |
1976 | |
1977 | err = nfs_init_inodecache(); | |
1978 | if (err) | |
89d77c8f | 1979 | goto out4; |
1da177e4 LT |
1980 | |
1981 | err = nfs_init_readpagecache(); | |
1982 | if (err) | |
89d77c8f | 1983 | goto out3; |
1da177e4 LT |
1984 | |
1985 | err = nfs_init_writepagecache(); | |
1986 | if (err) | |
89d77c8f | 1987 | goto out2; |
1da177e4 | 1988 | |
1da177e4 LT |
1989 | err = nfs_init_directcache(); |
1990 | if (err) | |
89d77c8f | 1991 | goto out1; |
1da177e4 LT |
1992 | |
1993 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1994 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1995 | #endif |
f7b422b1 | 1996 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1997 | goto out0; |
1998 | ||
1da177e4 | 1999 | return 0; |
129d1977 | 2000 | out0: |
1da177e4 | 2001 | #ifdef CONFIG_PROC_FS |
ec7652aa | 2002 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2003 | #endif |
1da177e4 | 2004 | nfs_destroy_directcache(); |
89d77c8f | 2005 | out1: |
129d1977 | 2006 | nfs_destroy_writepagecache(); |
89d77c8f | 2007 | out2: |
129d1977 | 2008 | nfs_destroy_readpagecache(); |
89d77c8f | 2009 | out3: |
129d1977 | 2010 | nfs_destroy_inodecache(); |
89d77c8f | 2011 | out4: |
129d1977 | 2012 | nfs_destroy_nfspagecache(); |
89d77c8f | 2013 | out5: |
129d1977 | 2014 | nfs_fs_proc_exit(); |
89d77c8f | 2015 | out6: |
129d1977 | 2016 | nfsiod_stop(); |
89d77c8f | 2017 | out7: |
129d1977 | 2018 | nfs_fscache_unregister(); |
89d77c8f | 2019 | out8: |
129d1977 | 2020 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 2021 | out9: |
1da177e4 LT |
2022 | return err; |
2023 | } | |
2024 | ||
2025 | static void __exit exit_nfs_fs(void) | |
2026 | { | |
1da177e4 | 2027 | nfs_destroy_directcache(); |
1da177e4 LT |
2028 | nfs_destroy_writepagecache(); |
2029 | nfs_destroy_readpagecache(); | |
2030 | nfs_destroy_inodecache(); | |
2031 | nfs_destroy_nfspagecache(); | |
8ec442ae | 2032 | nfs_fscache_unregister(); |
1b340d01 | 2033 | unregister_pernet_subsys(&nfs_net_ops); |
1da177e4 | 2034 | #ifdef CONFIG_PROC_FS |
ec7652aa | 2035 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2036 | #endif |
f7b422b1 | 2037 | unregister_nfs_fs(); |
6aaca566 | 2038 | nfs_fs_proc_exit(); |
5746006f | 2039 | nfsiod_stop(); |
1da177e4 LT |
2040 | } |
2041 | ||
2042 | /* Not quite true; I just maintain it */ | |
2043 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2044 | MODULE_LICENSE("GPL"); | |
f43bf0be | 2045 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
2046 | |
2047 | module_init(init_nfs_fs) | |
2048 | module_exit(exit_nfs_fs) |