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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 | ||
210c7c17 | 74 | static int nfs_wait_killable(int mode) |
72cb77f4 | 75 | { |
416ad3c9 | 76 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
77 | if (signal_pending_state(mode, current)) |
78 | return -ERESTARTSYS; | |
72cb77f4 TM |
79 | return 0; |
80 | } | |
210c7c17 BC |
81 | |
82 | int nfs_wait_bit_killable(struct wait_bit_key *key, int mode) | |
83 | { | |
84 | return nfs_wait_killable(mode); | |
85 | } | |
89d77c8f | 86 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 87 | |
210c7c17 BC |
88 | int nfs_wait_atomic_killable(atomic_t *p) |
89 | { | |
90 | return nfs_wait_killable(TASK_KILLABLE); | |
91 | } | |
92 | ||
f43bf0be TM |
93 | /** |
94 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
95 | * @fileid: 64-bit fileid | |
96 | * | |
97 | * This function returns a 32-bit inode number if the boot parameter | |
98 | * nfs.enable_ino64 is zero. | |
99 | */ | |
100 | u64 nfs_compat_user_ino64(u64 fileid) | |
101 | { | |
3fa0b4e2 FF |
102 | #ifdef CONFIG_COMPAT |
103 | compat_ulong_t ino; | |
104 | #else | |
105 | unsigned long ino; | |
106 | #endif | |
f43bf0be TM |
107 | |
108 | if (enable_ino64) | |
109 | return fileid; | |
110 | ino = fileid; | |
111 | if (sizeof(ino) < sizeof(fileid)) | |
112 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
113 | return ino; | |
114 | } | |
115 | ||
eed99357 TM |
116 | int nfs_drop_inode(struct inode *inode) |
117 | { | |
118 | return NFS_STALE(inode) || generic_drop_inode(inode); | |
119 | } | |
120 | EXPORT_SYMBOL_GPL(nfs_drop_inode); | |
121 | ||
19d87ca3 | 122 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 123 | { |
da6d503a TM |
124 | /* |
125 | * The following should never happen... | |
126 | */ | |
f48407dd TM |
127 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
128 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); | |
ada70d94 | 129 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 130 | nfs_access_zap_cache(inode); |
f1fe29b4 | 131 | nfs_fscache_clear_inode(inode); |
1da177e4 | 132 | } |
89d77c8f | 133 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 134 | |
b57922d9 AV |
135 | void nfs_evict_inode(struct inode *inode) |
136 | { | |
91b0abe3 | 137 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 138 | clear_inode(inode); |
b57922d9 AV |
139 | nfs_clear_inode(inode); |
140 | } | |
141 | ||
9e1681c2 | 142 | int nfs_sync_inode(struct inode *inode) |
4d346bea TM |
143 | { |
144 | nfs_inode_dio_wait(inode); | |
145 | return nfs_wb_all(inode); | |
146 | } | |
9e1681c2 | 147 | EXPORT_SYMBOL_GPL(nfs_sync_inode); |
4d346bea | 148 | |
29884df0 TM |
149 | /** |
150 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
151 | */ | |
152 | int nfs_sync_mapping(struct address_space *mapping) | |
153 | { | |
5cf95214 | 154 | int ret = 0; |
29884df0 | 155 | |
5cf95214 TM |
156 | if (mapping->nrpages != 0) { |
157 | unmap_mapping_range(mapping, 0, 0, 0); | |
158 | ret = nfs_wb_all(mapping->host); | |
159 | } | |
29884df0 TM |
160 | return ret; |
161 | } | |
162 | ||
6edf9609 TM |
163 | static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags) |
164 | { | |
165 | struct nfs_inode *nfsi = NFS_I(inode); | |
166 | ||
167 | if (inode->i_mapping->nrpages == 0) | |
168 | flags &= ~NFS_INO_INVALID_DATA; | |
169 | nfsi->cache_validity |= flags; | |
170 | if (flags & NFS_INO_INVALID_DATA) | |
171 | nfs_fscache_invalidate(inode); | |
172 | } | |
173 | ||
1da177e4 LT |
174 | /* |
175 | * Invalidate the local caches | |
176 | */ | |
b37b03b7 | 177 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
178 | { |
179 | struct nfs_inode *nfsi = NFS_I(inode); | |
180 | int mode = inode->i_mode; | |
181 | ||
91d5b470 CL |
182 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
183 | ||
c7c20973 TM |
184 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
185 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 186 | |
c3f52af3 | 187 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
de242c0b | 188 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
6edf9609 | 189 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
190 | | NFS_INO_INVALID_DATA |
191 | | NFS_INO_INVALID_ACCESS | |
192 | | NFS_INO_INVALID_ACL | |
6edf9609 | 193 | | NFS_INO_REVAL_PAGECACHE); |
aa9c2669 | 194 | } else |
6edf9609 | 195 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
196 | | NFS_INO_INVALID_ACCESS |
197 | | NFS_INO_INVALID_ACL | |
6edf9609 | 198 | | NFS_INO_REVAL_PAGECACHE); |
fd1defc2 | 199 | nfs_zap_label_cache_locked(nfsi); |
b37b03b7 | 200 | } |
dc59250c | 201 | |
b37b03b7 TM |
202 | void nfs_zap_caches(struct inode *inode) |
203 | { | |
204 | spin_lock(&inode->i_lock); | |
205 | nfs_zap_caches_locked(inode); | |
dc59250c | 206 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
207 | } |
208 | ||
cd9ae2b6 TM |
209 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
210 | { | |
211 | if (mapping->nrpages != 0) { | |
212 | spin_lock(&inode->i_lock); | |
6edf9609 | 213 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
cd9ae2b6 TM |
214 | spin_unlock(&inode->i_lock); |
215 | } | |
216 | } | |
217 | ||
f41f7418 | 218 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
219 | { |
220 | void (*clear_acl_cache)(struct inode *); | |
221 | ||
222 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
223 | if (clear_acl_cache != NULL) | |
224 | clear_acl_cache(inode); | |
dc59250c | 225 | spin_lock(&inode->i_lock); |
55296809 | 226 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 227 | spin_unlock(&inode->i_lock); |
1da177e4 | 228 | } |
1c606fb7 | 229 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 230 | |
c4812998 TM |
231 | void nfs_invalidate_atime(struct inode *inode) |
232 | { | |
233 | spin_lock(&inode->i_lock); | |
6edf9609 | 234 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
c4812998 TM |
235 | spin_unlock(&inode->i_lock); |
236 | } | |
ddda8e0a | 237 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 238 | |
1da177e4 | 239 | /* |
b37b03b7 TM |
240 | * Invalidate, but do not unhash, the inode. |
241 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 242 | */ |
b37b03b7 | 243 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 244 | { |
3a10c30a | 245 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 246 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
247 | } |
248 | ||
249 | struct nfs_find_desc { | |
250 | struct nfs_fh *fh; | |
251 | struct nfs_fattr *fattr; | |
252 | }; | |
253 | ||
254 | /* | |
255 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
256 | * this, and re-exported directories (also seen in NFSv2) | |
257 | * we are forced to allow 2 different inodes to have the same | |
258 | * i_ino. | |
259 | */ | |
260 | static int | |
261 | nfs_find_actor(struct inode *inode, void *opaque) | |
262 | { | |
263 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
264 | struct nfs_fh *fh = desc->fh; | |
265 | struct nfs_fattr *fattr = desc->fattr; | |
266 | ||
267 | if (NFS_FILEID(inode) != fattr->fileid) | |
268 | return 0; | |
f6488c9b JL |
269 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
270 | return 0; | |
1da177e4 LT |
271 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
272 | return 0; | |
273 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
274 | return 0; | |
275 | return 1; | |
276 | } | |
277 | ||
278 | static int | |
279 | nfs_init_locked(struct inode *inode, void *opaque) | |
280 | { | |
281 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
282 | struct nfs_fattr *fattr = desc->fattr; | |
283 | ||
99fadcd7 | 284 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
285 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
286 | return 0; | |
287 | } | |
288 | ||
e058f70b | 289 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
fd1defc2 TM |
290 | static void nfs_clear_label_invalid(struct inode *inode) |
291 | { | |
292 | spin_lock(&inode->i_lock); | |
293 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; | |
294 | spin_unlock(&inode->i_lock); | |
295 | } | |
296 | ||
aa9c2669 DQ |
297 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
298 | struct nfs4_label *label) | |
299 | { | |
300 | int error; | |
301 | ||
302 | if (label == NULL) | |
303 | return; | |
304 | ||
aa9c2669 DQ |
305 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
306 | error = security_inode_notifysecctx(inode, label->label, | |
307 | label->len); | |
308 | if (error) | |
309 | printk(KERN_ERR "%s() %s %d " | |
310 | "security_inode_notifysecctx() %d\n", | |
311 | __func__, | |
312 | (char *)label->label, | |
313 | label->len, error); | |
fd1defc2 | 314 | nfs_clear_label_invalid(inode); |
aa9c2669 DQ |
315 | } |
316 | } | |
317 | ||
e058f70b SD |
318 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
319 | { | |
320 | struct nfs4_label *label = NULL; | |
321 | int minor_version = server->nfs_client->cl_minorversion; | |
322 | ||
323 | if (minor_version < 2) | |
324 | return label; | |
325 | ||
326 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
327 | return label; | |
328 | ||
329 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
330 | if (label == NULL) | |
331 | return ERR_PTR(-ENOMEM); | |
332 | ||
333 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
334 | if (label->label == NULL) { | |
335 | kfree(label); | |
336 | return ERR_PTR(-ENOMEM); | |
337 | } | |
338 | label->len = NFS4_MAXLABELLEN; | |
339 | ||
340 | return label; | |
341 | } | |
342 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 343 | #else |
829e57d7 | 344 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
aa9c2669 DQ |
345 | struct nfs4_label *label) |
346 | { | |
347 | } | |
e058f70b | 348 | #endif |
aa9c2669 | 349 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 350 | |
1da177e4 LT |
351 | /* |
352 | * This is our front-end to iget that looks up inodes by file handle | |
353 | * instead of inode number. | |
354 | */ | |
355 | struct inode * | |
1775fd3e | 356 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
357 | { |
358 | struct nfs_find_desc desc = { | |
359 | .fh = fh, | |
360 | .fattr = fattr | |
361 | }; | |
03f28e3a | 362 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
363 | unsigned long hash; |
364 | ||
7ebb9315 BS |
365 | nfs_attr_check_mountpoint(sb, fattr); |
366 | ||
2ef47eb1 AS |
367 | if (nfs_attr_use_mounted_on_fileid(fattr)) |
368 | fattr->fileid = fattr->mounted_on_fileid; | |
369 | else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) | |
1da177e4 | 370 | goto out_no_inode; |
9e6e70f8 | 371 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 372 | goto out_no_inode; |
1da177e4 LT |
373 | |
374 | hash = nfs_fattr_to_ino_t(fattr); | |
375 | ||
03f28e3a TM |
376 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
377 | if (inode == NULL) { | |
378 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 379 | goto out_no_inode; |
03f28e3a | 380 | } |
1da177e4 LT |
381 | |
382 | if (inode->i_state & I_NEW) { | |
383 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 384 | unsigned long now = jiffies; |
1da177e4 LT |
385 | |
386 | /* We set i_ino for the few things that still rely on it, | |
387 | * such as stat(2) */ | |
388 | inode->i_ino = hash; | |
389 | ||
390 | /* We can't support update_atime(), since the server will reset it */ | |
391 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
392 | inode->i_mode = fattr->mode; | |
62ab460c TM |
393 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
394 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
6edf9609 | 395 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
1da177e4 LT |
396 | /* Why so? Because we want revalidate for devices/FIFOs, and |
397 | * that's precisely what we have in nfs_file_inode_operations. | |
398 | */ | |
8fa5c000 | 399 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 400 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 401 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 | 402 | inode->i_data.a_ops = &nfs_file_aops; |
1da177e4 | 403 | } else if (S_ISDIR(inode->i_mode)) { |
8fa5c000 | 404 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 405 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 406 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 407 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
408 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
409 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
410 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
411 | inode->i_op = &nfs_referral_inode_operations; | |
412 | else | |
413 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 414 | inode->i_fop = NULL; |
36d43a43 | 415 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 416 | } |
1da177e4 LT |
417 | } else if (S_ISLNK(inode->i_mode)) |
418 | inode->i_op = &nfs_symlink_inode_operations; | |
419 | else | |
420 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
421 | ||
9e6e70f8 TM |
422 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
423 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
424 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 425 | inode->i_version = 0; |
9e6e70f8 | 426 | inode->i_size = 0; |
6d6b77f1 | 427 | clear_nlink(inode); |
9ff593c4 EB |
428 | inode->i_uid = make_kuid(&init_user_ns, -2); |
429 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
430 | inode->i_blocks = 0; |
431 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
432 | nfsi->write_io = 0; |
433 | nfsi->read_io = 0; | |
9e6e70f8 | 434 | |
33801147 | 435 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 436 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
437 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
438 | inode->i_atime = fattr->atime; | |
62ab460c | 439 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
6edf9609 | 440 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
441 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
442 | inode->i_mtime = fattr->mtime; | |
62ab460c | 443 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
6edf9609 | 444 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
445 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
446 | inode->i_ctime = fattr->ctime; | |
62ab460c | 447 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
6edf9609 | 448 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 | 449 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 450 | inode->i_version = fattr->change_attr; |
cd812599 | 451 | else |
5c675d64 TM |
452 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
453 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 TM |
454 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
455 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 456 | else |
6edf9609 TM |
457 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
458 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 | 459 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 460 | set_nlink(inode, fattr->nlink); |
62ab460c | 461 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
6edf9609 | 462 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
463 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
464 | inode->i_uid = fattr->uid; | |
62ab460c | 465 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
6edf9609 | 466 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
467 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
468 | inode->i_gid = fattr->gid; | |
62ab460c | 469 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
6edf9609 | 470 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
471 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
472 | inode->i_blocks = fattr->du.nfs2.blocks; | |
473 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
474 | /* |
475 | * report the blocks in 512byte units | |
476 | */ | |
477 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 478 | } |
aa9c2669 DQ |
479 | |
480 | nfs_setsecurity(inode, fattr, label); | |
481 | ||
1da177e4 | 482 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 483 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 484 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 485 | |
f1fe29b4 | 486 | nfs_fscache_init_inode(inode); |
ef79c097 | 487 | |
1da177e4 LT |
488 | unlock_new_inode(inode); |
489 | } else | |
490 | nfs_refresh_inode(inode, fattr); | |
1e8968c5 | 491 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 492 | inode->i_sb->s_id, |
1e8968c5 | 493 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 494 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
495 | atomic_read(&inode->i_count)); |
496 | ||
497 | out: | |
498 | return inode; | |
499 | ||
500 | out_no_inode: | |
03f28e3a | 501 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
502 | goto out; |
503 | } | |
89d77c8f | 504 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 505 | |
536e43d1 | 506 | #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 |
507 | |
508 | int | |
509 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
510 | { | |
2b0143b5 | 511 | struct inode *inode = d_inode(dentry); |
987f8dfc | 512 | struct nfs_fattr *fattr; |
ae57ca0f | 513 | int error = 0; |
1da177e4 | 514 | |
91d5b470 CL |
515 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
516 | ||
188b95dd JL |
517 | /* skip mode change if it's just for clearing setuid/setgid */ |
518 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
519 | attr->ia_valid &= ~ATTR_MODE; | |
520 | ||
1da177e4 | 521 | if (attr->ia_valid & ATTR_SIZE) { |
08a899d5 CH |
522 | BUG_ON(!S_ISREG(inode->i_mode)); |
523 | ||
ae57ca0f KM |
524 | error = inode_newsize_ok(inode, attr->ia_size); |
525 | if (error) | |
526 | return error; | |
527 | ||
528 | if (attr->ia_size == i_size_read(inode)) | |
1da177e4 LT |
529 | attr->ia_valid &= ~ATTR_SIZE; |
530 | } | |
531 | ||
532 | /* Optimization: if the end result is no change, don't RPC */ | |
533 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 534 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
535 | return 0; |
536 | ||
f4ce1299 TM |
537 | trace_nfs_setattr_enter(inode); |
538 | ||
755c1e20 | 539 | /* Write all dirty data */ |
4d346bea TM |
540 | if (S_ISREG(inode->i_mode)) |
541 | nfs_sync_inode(inode); | |
987f8dfc TM |
542 | |
543 | fattr = nfs_alloc_fattr(); | |
ae57ca0f KM |
544 | if (fattr == NULL) { |
545 | error = -ENOMEM; | |
987f8dfc | 546 | goto out; |
ae57ca0f KM |
547 | } |
548 | ||
642ac549 TM |
549 | /* |
550 | * Return any delegations if we're going to change ACLs | |
551 | */ | |
552 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 553 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 554 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 555 | if (error == 0) |
aa9c2669 | 556 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
557 | nfs_free_fattr(fattr); |
558 | out: | |
f4ce1299 | 559 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
560 | return error; |
561 | } | |
ddda8e0a | 562 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 563 | |
a3d01454 TM |
564 | /** |
565 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
566 | * @inode: inode of the file used | |
567 | * @offset: file offset to start truncating | |
568 | * | |
569 | * This is a copy of the common vmtruncate, but with the locking | |
570 | * corrected to take into account the fact that NFS requires | |
571 | * inode->i_size to be updated under the inode->i_lock. | |
f044636d | 572 | * Note: must be called with inode->i_lock held! |
a3d01454 TM |
573 | */ |
574 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
575 | { | |
c08d3b0e | 576 | int err; |
a3d01454 | 577 | |
c08d3b0e | 578 | err = inode_newsize_ok(inode, offset); |
579 | if (err) | |
580 | goto out; | |
a3d01454 | 581 | |
c08d3b0e | 582 | i_size_write(inode, offset); |
6edf9609 TM |
583 | /* Optimisation */ |
584 | if (offset == 0) | |
585 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA; | |
c08d3b0e | 586 | |
f044636d | 587 | spin_unlock(&inode->i_lock); |
7caef267 | 588 | truncate_pagecache(inode, offset); |
f044636d | 589 | spin_lock(&inode->i_lock); |
c08d3b0e | 590 | out: |
591 | return err; | |
a3d01454 TM |
592 | } |
593 | ||
65e4308d TM |
594 | /** |
595 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
596 | * @inode: pointer to struct inode | |
597 | * @attr: pointer to struct iattr | |
598 | * | |
599 | * Note: we do this in the *proc.c in order to ensure that | |
600 | * it works for things like exclusive creates too. | |
601 | */ | |
f044636d TM |
602 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, |
603 | struct nfs_fattr *fattr) | |
65e4308d | 604 | { |
f044636d TM |
605 | /* Barrier: bump the attribute generation count. */ |
606 | nfs_fattr_set_barrier(fattr); | |
607 | ||
608 | spin_lock(&inode->i_lock); | |
609 | NFS_I(inode)->attr_gencount = fattr->gencount; | |
65e4308d | 610 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
1da177e4 | 611 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
612 | int mode = attr->ia_mode & S_IALLUGO; |
613 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
614 | inode->i_mode = mode; |
615 | } | |
616 | if ((attr->ia_valid & ATTR_UID) != 0) | |
617 | inode->i_uid = attr->ia_uid; | |
618 | if ((attr->ia_valid & ATTR_GID) != 0) | |
619 | inode->i_gid = attr->ia_gid; | |
6edf9609 TM |
620 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
621 | | NFS_INO_INVALID_ACL); | |
65e4308d TM |
622 | } |
623 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 624 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 625 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 626 | } |
616c3196 JL |
627 | if (fattr->valid) |
628 | nfs_update_inode(inode, fattr); | |
629 | else | |
630 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; | |
f044636d | 631 | spin_unlock(&inode->i_lock); |
1da177e4 | 632 | } |
ddda8e0a | 633 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 634 | |
311324ad TM |
635 | static void nfs_request_parent_use_readdirplus(struct dentry *dentry) |
636 | { | |
637 | struct dentry *parent; | |
638 | ||
639 | parent = dget_parent(dentry); | |
2b0143b5 | 640 | nfs_force_use_readdirplus(d_inode(parent)); |
311324ad TM |
641 | dput(parent); |
642 | } | |
643 | ||
644 | static bool nfs_need_revalidate_inode(struct inode *inode) | |
645 | { | |
646 | if (NFS_I(inode)->cache_validity & | |
647 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
648 | return true; | |
649 | if (nfs_attribute_cache_expired(inode)) | |
650 | return true; | |
651 | return false; | |
652 | } | |
653 | ||
1da177e4 LT |
654 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
655 | { | |
2b0143b5 | 656 | struct inode *inode = d_inode(dentry); |
55296809 | 657 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
16caf5b6 | 658 | int err = 0; |
1da177e4 | 659 | |
f4ce1299 | 660 | trace_nfs_getattr_enter(inode); |
acdc53b2 | 661 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 662 | if (S_ISREG(inode->i_mode)) { |
8c18d76b | 663 | mutex_lock(&inode->i_mutex); |
4d346bea | 664 | err = nfs_sync_inode(inode); |
8c18d76b | 665 | mutex_unlock(&inode->i_mutex); |
acdc53b2 TM |
666 | if (err) |
667 | goto out; | |
28c494c5 | 668 | } |
fc33a7bb CH |
669 | |
670 | /* | |
671 | * We may force a getattr if the user cares about atime. | |
672 | * | |
673 | * Note that we only have to check the vfsmount flags here: | |
674 | * - NFS always sets S_NOATIME by so checking it would give a | |
675 | * bogus result | |
676 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
677 | * no point in checking those. | |
678 | */ | |
679 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
680 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 681 | need_atime = 0; |
fc33a7bb | 682 | |
311324ad TM |
683 | if (need_atime || nfs_need_revalidate_inode(inode)) { |
684 | struct nfs_server *server = NFS_SERVER(inode); | |
685 | ||
686 | if (server->caps & NFS_CAP_READDIRPLUS) | |
687 | nfs_request_parent_use_readdirplus(dentry); | |
688 | err = __nfs_revalidate_inode(server, inode); | |
689 | } | |
4e769b93 | 690 | if (!err) { |
1da177e4 | 691 | generic_fillattr(inode, stat); |
f43bf0be | 692 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
7ef5ca4f N |
693 | if (S_ISDIR(inode->i_mode)) |
694 | stat->blksize = NFS_SERVER(inode)->dtsize; | |
4e769b93 | 695 | } |
acdc53b2 | 696 | out: |
f4ce1299 | 697 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
698 | return err; |
699 | } | |
ddda8e0a | 700 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 701 | |
f11ac8db TM |
702 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
703 | { | |
704 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
705 | l_ctx->lockowner.l_owner = current->files; |
706 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 707 | INIT_LIST_HEAD(&l_ctx->list); |
210c7c17 | 708 | atomic_set(&l_ctx->io_count, 0); |
f11ac8db TM |
709 | } |
710 | ||
711 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
712 | { | |
8c86899f TM |
713 | struct nfs_lock_context *head = &ctx->lock_context; |
714 | struct nfs_lock_context *pos = head; | |
f11ac8db | 715 | |
8c86899f | 716 | do { |
2a369153 | 717 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 718 | continue; |
2a369153 | 719 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
720 | continue; |
721 | atomic_inc(&pos->count); | |
722 | return pos; | |
8c86899f | 723 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
724 | return NULL; |
725 | } | |
726 | ||
727 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
728 | { | |
729 | struct nfs_lock_context *res, *new = NULL; | |
2b0143b5 | 730 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db TM |
731 | |
732 | spin_lock(&inode->i_lock); | |
733 | res = __nfs_find_lock_context(ctx); | |
734 | if (res == NULL) { | |
735 | spin_unlock(&inode->i_lock); | |
736 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
737 | if (new == NULL) | |
b3c54de6 | 738 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
739 | nfs_init_lock_context(new); |
740 | spin_lock(&inode->i_lock); | |
741 | res = __nfs_find_lock_context(ctx); | |
742 | if (res == NULL) { | |
743 | list_add_tail(&new->list, &ctx->lock_context.list); | |
744 | new->open_context = ctx; | |
745 | res = new; | |
746 | new = NULL; | |
747 | } | |
748 | } | |
749 | spin_unlock(&inode->i_lock); | |
750 | kfree(new); | |
751 | return res; | |
752 | } | |
1c6dcbe5 | 753 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
754 | |
755 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
756 | { | |
757 | struct nfs_open_context *ctx = l_ctx->open_context; | |
2b0143b5 | 758 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db TM |
759 | |
760 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
761 | return; | |
762 | list_del(&l_ctx->list); | |
763 | spin_unlock(&inode->i_lock); | |
764 | kfree(l_ctx); | |
765 | } | |
1c6dcbe5 | 766 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 767 | |
7fe5c398 TM |
768 | /** |
769 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
770 | * @ctx: pointer to context | |
771 | * @is_sync: is this a synchronous close | |
772 | * | |
5cf9d706 TM |
773 | * Ensure that the attributes are up to date if we're mounted |
774 | * with close-to-open semantics and we have cached data that will | |
775 | * need to be revalidated on open. | |
7fe5c398 TM |
776 | */ |
777 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
778 | { | |
5cf9d706 | 779 | struct nfs_inode *nfsi; |
7fe5c398 TM |
780 | struct inode *inode; |
781 | struct nfs_server *server; | |
782 | ||
783 | if (!(ctx->mode & FMODE_WRITE)) | |
784 | return; | |
785 | if (!is_sync) | |
786 | return; | |
2b0143b5 | 787 | inode = d_inode(ctx->dentry); |
5cf9d706 TM |
788 | nfsi = NFS_I(inode); |
789 | if (inode->i_mapping->nrpages == 0) | |
790 | return; | |
791 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
792 | return; | |
793 | if (!list_empty(&nfsi->open_files)) | |
7fe5c398 TM |
794 | return; |
795 | server = NFS_SERVER(inode); | |
796 | if (server->flags & NFS_MOUNT_NOCTO) | |
797 | return; | |
798 | nfs_revalidate_inode(server, inode); | |
799 | } | |
ddda8e0a | 800 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 801 | |
5ede7b1c | 802 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
803 | { |
804 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
805 | struct rpc_cred *cred = rpc_lookup_cred(); |
806 | if (IS_ERR(cred)) | |
807 | return ERR_CAST(cred); | |
1da177e4 | 808 | |
f52720ca | 809 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
810 | if (!ctx) { |
811 | put_rpccred(cred); | |
812 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 813 | } |
5ede7b1c AV |
814 | nfs_sb_active(dentry->d_sb); |
815 | ctx->dentry = dget(dentry); | |
816 | ctx->cred = cred; | |
817 | ctx->state = NULL; | |
818 | ctx->mode = f_mode; | |
819 | ctx->flags = 0; | |
820 | ctx->error = 0; | |
821 | nfs_init_lock_context(&ctx->lock_context); | |
822 | ctx->lock_context.open_context = ctx; | |
823 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 824 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
825 | return ctx; |
826 | } | |
89d77c8f | 827 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
828 | |
829 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
830 | { | |
831 | if (ctx != NULL) | |
f11ac8db | 832 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
833 | return ctx; |
834 | } | |
89d77c8f | 835 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 836 | |
7fe5c398 | 837 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 838 | { |
2b0143b5 | 839 | struct inode *inode = d_inode(ctx->dentry); |
3d4ff43d | 840 | struct super_block *sb = ctx->dentry->d_sb; |
3bec63db | 841 | |
5c78f58e | 842 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
843 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
844 | return; | |
845 | list_del(&ctx->list); | |
846 | spin_unlock(&inode->i_lock); | |
ef84303e | 847 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 848 | return; |
5c78f58e TM |
849 | if (inode != NULL) |
850 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
851 | if (ctx->cred != NULL) |
852 | put_rpccred(ctx->cred); | |
3d4ff43d | 853 | dput(ctx->dentry); |
322b2b90 | 854 | nfs_sb_deactive(sb); |
82be417a | 855 | kfree(ctx->mdsthreshold); |
3bec63db TM |
856 | kfree(ctx); |
857 | } | |
858 | ||
a49c3c77 TM |
859 | void put_nfs_open_context(struct nfs_open_context *ctx) |
860 | { | |
861 | __put_nfs_open_context(ctx, 0); | |
862 | } | |
89d77c8f | 863 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 864 | |
4eae5014 TM |
865 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
866 | { | |
867 | __put_nfs_open_context(ctx, 1); | |
868 | } | |
869 | ||
1da177e4 LT |
870 | /* |
871 | * Ensure that mmap has a recent RPC credential for use when writing out | |
872 | * shared pages | |
873 | */ | |
c45ffdd2 | 874 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 875 | { |
2b0143b5 | 876 | struct inode *inode = d_inode(ctx->dentry); |
1da177e4 LT |
877 | struct nfs_inode *nfsi = NFS_I(inode); |
878 | ||
1da177e4 LT |
879 | spin_lock(&inode->i_lock); |
880 | list_add(&ctx->list, &nfsi->open_files); | |
881 | spin_unlock(&inode->i_lock); | |
882 | } | |
c45ffdd2 TM |
883 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
884 | ||
885 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
886 | { | |
887 | filp->private_data = get_nfs_open_context(ctx); | |
888 | if (list_empty(&ctx->list)) | |
889 | nfs_inode_attach_open_context(ctx); | |
890 | } | |
89d77c8f | 891 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 892 | |
d530838b TM |
893 | /* |
894 | * Given an inode, search for an open context with the desired characteristics | |
895 | */ | |
dc0b027d | 896 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
897 | { |
898 | struct nfs_inode *nfsi = NFS_I(inode); | |
899 | struct nfs_open_context *pos, *ctx = NULL; | |
900 | ||
901 | spin_lock(&inode->i_lock); | |
902 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
903 | if (cred != NULL && pos->cred != cred) |
904 | continue; | |
1544fa0f TM |
905 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
906 | continue; | |
907 | ctx = get_nfs_open_context(pos); | |
908 | break; | |
1da177e4 LT |
909 | } |
910 | spin_unlock(&inode->i_lock); | |
911 | return ctx; | |
912 | } | |
913 | ||
aff8d8dc | 914 | void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 915 | { |
cd3758e3 | 916 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
917 | |
918 | if (ctx) { | |
2b0143b5 | 919 | struct inode *inode = d_inode(ctx->dentry); |
c45ffdd2 | 920 | |
0bcbf039 PT |
921 | /* |
922 | * We fatal error on write before. Try to writeback | |
923 | * every page again. | |
924 | */ | |
925 | if (ctx->error < 0) | |
926 | invalidate_inode_pages2(inode->i_mapping); | |
1da177e4 LT |
927 | filp->private_data = NULL; |
928 | spin_lock(&inode->i_lock); | |
929 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
930 | spin_unlock(&inode->i_lock); | |
4eae5014 | 931 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
932 | } |
933 | } | |
934 | ||
935 | /* | |
936 | * These allocate and release file read/write context information. | |
937 | */ | |
938 | int nfs_open(struct inode *inode, struct file *filp) | |
939 | { | |
940 | struct nfs_open_context *ctx; | |
1da177e4 | 941 | |
5ede7b1c AV |
942 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
943 | if (IS_ERR(ctx)) | |
944 | return PTR_ERR(ctx); | |
1da177e4 LT |
945 | nfs_file_set_open_context(filp, ctx); |
946 | put_nfs_open_context(ctx); | |
f1fe29b4 | 947 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
948 | return 0; |
949 | } | |
950 | ||
1da177e4 LT |
951 | /* |
952 | * This function is called whenever some part of NFS notices that | |
953 | * the cached attributes have to be refreshed. | |
954 | */ | |
955 | int | |
956 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
957 | { | |
958 | int status = -ESTALE; | |
1775fd3e | 959 | struct nfs4_label *label = NULL; |
a3cba2aa | 960 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 961 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 962 | |
1e8968c5 NV |
963 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
964 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 965 | |
f4ce1299 TM |
966 | trace_nfs_revalidate_inode_enter(inode); |
967 | ||
85233a7a | 968 | if (is_bad_inode(inode)) |
691beb13 | 969 | goto out; |
1da177e4 | 970 | if (NFS_STALE(inode)) |
412d582e | 971 | goto out; |
7fdc49c4 | 972 | |
a3cba2aa TM |
973 | status = -ENOMEM; |
974 | fattr = nfs_alloc_fattr(); | |
975 | if (fattr == NULL) | |
976 | goto out; | |
977 | ||
691beb13 | 978 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
979 | |
980 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
981 | if (IS_ERR(label)) { | |
982 | status = PTR_ERR(label); | |
983 | goto out; | |
984 | } | |
985 | ||
1775fd3e | 986 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 | 987 | if (status != 0) { |
1e8968c5 | 988 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 989 | inode->i_sb->s_id, |
1e8968c5 | 990 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
991 | if (status == -ESTALE) { |
992 | nfs_zap_caches(inode); | |
993 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 994 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 995 | } |
14c43f76 | 996 | goto err_out; |
1da177e4 LT |
997 | } |
998 | ||
a3cba2aa | 999 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 1000 | if (status) { |
1e8968c5 | 1001 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 1002 | inode->i_sb->s_id, |
1e8968c5 | 1003 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 1004 | goto err_out; |
1da177e4 | 1005 | } |
55296809 | 1006 | |
24aa1fe6 | 1007 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1008 | nfs_zap_acl_cache(inode); |
55296809 | 1009 | |
3da580aa JL |
1010 | nfs_setsecurity(inode, fattr, label); |
1011 | ||
1e8968c5 | 1012 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 1013 | inode->i_sb->s_id, |
1e8968c5 | 1014 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 1015 | |
14c43f76 DQ |
1016 | err_out: |
1017 | nfs4_label_free(label); | |
1018 | out: | |
a3cba2aa | 1019 | nfs_free_fattr(fattr); |
f4ce1299 | 1020 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
1021 | return status; |
1022 | } | |
1023 | ||
1024 | int nfs_attribute_timeout(struct inode *inode) | |
1025 | { | |
1026 | struct nfs_inode *nfsi = NFS_I(inode); | |
1027 | ||
d7cf8dd0 TM |
1028 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
1029 | } | |
1030 | ||
43f291cd | 1031 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 1032 | { |
b4d2314b | 1033 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 1034 | return 0; |
d7cf8dd0 | 1035 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
1036 | } |
1037 | ||
1038 | /** | |
1039 | * nfs_revalidate_inode - Revalidate the inode attributes | |
1040 | * @server - pointer to nfs_server struct | |
1041 | * @inode - pointer to inode struct | |
1042 | * | |
1043 | * Updates inode attribute information by retrieving the data from the server. | |
1044 | */ | |
1045 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1046 | { | |
311324ad | 1047 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1048 | return NFS_STALE(inode) ? -ESTALE : 0; |
1049 | return __nfs_revalidate_inode(server, inode); | |
1050 | } | |
1c606fb7 | 1051 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1052 | |
912a108d N |
1053 | int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode) |
1054 | { | |
1055 | if (!(NFS_I(inode)->cache_validity & | |
1056 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
1057 | && !nfs_attribute_cache_expired(inode)) | |
1058 | return NFS_STALE(inode) ? -ESTALE : 0; | |
1059 | return -ECHILD; | |
1060 | } | |
1061 | ||
1cda707d | 1062 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1063 | { |
1064 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1065 | int ret; |
1066 | ||
717d44e8 | 1067 | if (mapping->nrpages != 0) { |
f8806c84 | 1068 | if (S_ISREG(inode->i_mode)) { |
ef070dcb | 1069 | unmap_mapping_range(mapping, 0, 0, 0); |
f8806c84 TM |
1070 | ret = nfs_sync_mapping(mapping); |
1071 | if (ret < 0) | |
1072 | return ret; | |
1073 | } | |
1074 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1075 | if (ret < 0) |
1076 | return ret; | |
1077 | } | |
d529ef83 JL |
1078 | if (S_ISDIR(inode->i_mode)) { |
1079 | spin_lock(&inode->i_lock); | |
717d44e8 | 1080 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1081 | spin_unlock(&inode->i_lock); |
1082 | } | |
717d44e8 | 1083 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1084 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1085 | |
1e8968c5 NV |
1086 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1087 | inode->i_sb->s_id, | |
1088 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1089 | return 0; |
1090 | } | |
1091 | ||
b4b1eadf TM |
1092 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
1093 | { | |
1094 | if (nfs_have_delegated_attributes(inode)) | |
1095 | return false; | |
1096 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
1097 | || nfs_attribute_timeout(inode) | |
1098 | || NFS_STALE(inode); | |
1099 | } | |
1100 | ||
717d44e8 | 1101 | /** |
874f9463 | 1102 | * __nfs_revalidate_mapping - Revalidate the pagecache |
717d44e8 TM |
1103 | * @inode - pointer to host inode |
1104 | * @mapping - pointer to mapping | |
874f9463 | 1105 | * @may_lock - take inode->i_mutex? |
717d44e8 | 1106 | */ |
874f9463 TM |
1107 | static int __nfs_revalidate_mapping(struct inode *inode, |
1108 | struct address_space *mapping, | |
1109 | bool may_lock) | |
717d44e8 TM |
1110 | { |
1111 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1112 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1113 | int ret = 0; |
dc59250c | 1114 | |
29418aa4 MG |
1115 | /* swapfiles are not supposed to be shared. */ |
1116 | if (IS_SWAPFILE(inode)) | |
1117 | goto out; | |
1118 | ||
b4b1eadf | 1119 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1120 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1121 | if (ret < 0) | |
1122 | goto out; | |
7d52e862 | 1123 | } |
d529ef83 JL |
1124 | |
1125 | /* | |
1126 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1127 | * invalidations that come in while we're shooting down the mappings | |
1128 | * are respected. But, that leaves a race window where one revalidator | |
1129 | * can clear the flag, and then another checks it before the mapping | |
1130 | * gets invalidated. Fix that by serializing access to this part of | |
1131 | * the function. | |
1132 | * | |
1133 | * At the same time, we need to allow other tasks to see whether we | |
1134 | * might be in the middle of invalidating the pages, so we only set | |
1135 | * the bit lock here if it looks like we're going to be doing that. | |
1136 | */ | |
1137 | for (;;) { | |
74316201 N |
1138 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1139 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1140 | if (ret) |
1141 | goto out; | |
17dfeb91 TM |
1142 | spin_lock(&inode->i_lock); |
1143 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1144 | spin_unlock(&inode->i_lock); | |
1145 | continue; | |
1146 | } | |
1147 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1148 | break; |
d529ef83 | 1149 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1150 | goto out; |
f4ce1299 TM |
1151 | } |
1152 | ||
17dfeb91 | 1153 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1154 | smp_wmb(); |
17dfeb91 TM |
1155 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1156 | spin_unlock(&inode->i_lock); | |
1157 | trace_nfs_invalidate_mapping_enter(inode); | |
874f9463 TM |
1158 | if (may_lock) { |
1159 | mutex_lock(&inode->i_mutex); | |
1160 | ret = nfs_invalidate_mapping(inode, mapping); | |
1161 | mutex_unlock(&inode->i_mutex); | |
1162 | } else | |
1163 | ret = nfs_invalidate_mapping(inode, mapping); | |
17dfeb91 TM |
1164 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1165 | ||
d529ef83 | 1166 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1167 | smp_mb__after_atomic(); |
d529ef83 | 1168 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1169 | out: |
44b11874 | 1170 | return ret; |
7d52e862 TM |
1171 | } |
1172 | ||
874f9463 TM |
1173 | /** |
1174 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1175 | * @inode - pointer to host inode | |
1176 | * @mapping - pointer to mapping | |
1177 | */ | |
1178 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1179 | { | |
1180 | return __nfs_revalidate_mapping(inode, mapping, false); | |
1181 | } | |
1182 | ||
1183 | /** | |
1184 | * nfs_revalidate_mapping_protected - Revalidate the pagecache | |
1185 | * @inode - pointer to host inode | |
1186 | * @mapping - pointer to mapping | |
1187 | * | |
1188 | * Differs from nfs_revalidate_mapping() in that it grabs the inode->i_mutex | |
1189 | * while invalidating the mapping. | |
1190 | */ | |
1191 | int nfs_revalidate_mapping_protected(struct inode *inode, struct address_space *mapping) | |
1192 | { | |
1193 | return __nfs_revalidate_mapping(inode, mapping, true); | |
1194 | } | |
1195 | ||
27dc1cd3 | 1196 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1197 | { |
1198 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1199 | unsigned long ret = 0; |
a895b4a1 | 1200 | |
9e6e70f8 TM |
1201 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1202 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1203 | && inode->i_version == fattr->pre_change_attr) { |
1204 | inode->i_version = fattr->change_attr; | |
70ca8852 | 1205 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1206 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1207 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1208 | } |
a895b4a1 | 1209 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1210 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1211 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1212 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1213 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1214 | ret |= NFS_INO_INVALID_ATTR; | |
1215 | } | |
9e6e70f8 TM |
1216 | |
1217 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1218 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1219 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1220 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1221 | if (S_ISDIR(inode->i_mode)) | |
6edf9609 | 1222 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1223 | ret |= NFS_INO_INVALID_ATTR; |
a895b4a1 | 1224 | } |
9e6e70f8 TM |
1225 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1226 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1227 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
cb1410c7 | 1228 | && nfsi->nrequests == 0) { |
27dc1cd3 TM |
1229 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
1230 | ret |= NFS_INO_INVALID_ATTR; | |
1231 | } | |
de242c0b | 1232 | |
27dc1cd3 | 1233 | return ret; |
a895b4a1 TM |
1234 | } |
1235 | ||
1da177e4 | 1236 | /** |
33801147 | 1237 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1238 | * @inode - pointer to inode |
1239 | * @fattr - updated attributes | |
1240 | * | |
1241 | * Verifies the attribute cache. If we have just changed the attributes, | |
1242 | * so that fattr carries weak cache consistency data, then it may | |
1243 | * also update the ctime/mtime/change_attribute. | |
1244 | */ | |
33801147 | 1245 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1246 | { |
1247 | struct nfs_inode *nfsi = NFS_I(inode); | |
1248 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1249 | unsigned long invalid = 0; |
1da177e4 | 1250 | |
dc59250c | 1251 | |
01da47bd TM |
1252 | if (nfs_have_delegated_attributes(inode)) |
1253 | return 0; | |
ca62b9c3 | 1254 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1255 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1256 | return -EIO; | |
1257 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1258 | return -EIO; |
ca62b9c3 | 1259 | |
9e6e70f8 | 1260 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 1261 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 1262 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1263 | |
1da177e4 | 1264 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1265 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1266 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1267 | |
9e6e70f8 TM |
1268 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1269 | cur_size = i_size_read(inode); | |
1270 | new_isize = nfs_size_to_loff_t(fattr->size); | |
85a23cee | 1271 | if (cur_size != new_isize) |
9e6e70f8 TM |
1272 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1273 | } | |
85a23cee TM |
1274 | if (nfsi->nrequests != 0) |
1275 | invalid &= ~NFS_INO_REVAL_PAGECACHE; | |
1da177e4 LT |
1276 | |
1277 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1278 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1279 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1280 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1281 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1282 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1283 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1284 | |
1285 | /* Has the link count changed? */ | |
9e6e70f8 | 1286 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1287 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1288 | |
9e6e70f8 | 1289 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1290 | invalid |= NFS_INO_INVALID_ATIME; |
1291 | ||
1292 | if (invalid != 0) | |
6edf9609 | 1293 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1294 | |
33801147 | 1295 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1296 | return 0; |
1297 | } | |
1298 | ||
ae05f269 | 1299 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1300 | |
1301 | static unsigned long nfs_read_attr_generation_counter(void) | |
1302 | { | |
ae05f269 | 1303 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1304 | } |
1305 | ||
1306 | unsigned long nfs_inc_attr_generation_counter(void) | |
1307 | { | |
ae05f269 | 1308 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 | 1309 | } |
3235b403 | 1310 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
4704f0e2 TM |
1311 | |
1312 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1313 | { | |
1314 | fattr->valid = 0; | |
1315 | fattr->time_start = jiffies; | |
1316 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1317 | fattr->owner_name = NULL; |
1318 | fattr->group_name = NULL; | |
4704f0e2 | 1319 | } |
ddda8e0a | 1320 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1321 | |
140e049c TM |
1322 | /** |
1323 | * nfs_fattr_set_barrier | |
1324 | * @fattr: attributes | |
1325 | * | |
1326 | * Used to set a barrier after an attribute was updated. This | |
1327 | * barrier ensures that older attributes from RPC calls that may | |
1328 | * have raced with our update cannot clobber these new values. | |
1329 | * Note that you are still responsible for ensuring that other | |
1330 | * operations which change the attribute on the server do not | |
1331 | * collide. | |
1332 | */ | |
1333 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) | |
1334 | { | |
1335 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1336 | } | |
1337 | ||
2d36bfde TM |
1338 | struct nfs_fattr *nfs_alloc_fattr(void) |
1339 | { | |
1340 | struct nfs_fattr *fattr; | |
1341 | ||
1342 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1343 | if (fattr != NULL) | |
1344 | nfs_fattr_init(fattr); | |
1345 | return fattr; | |
1346 | } | |
ddda8e0a | 1347 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1348 | |
1349 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1350 | { | |
1351 | struct nfs_fh *fh; | |
1352 | ||
1353 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1354 | if (fh != NULL) | |
1355 | fh->size = 0; | |
1356 | return fh; | |
1357 | } | |
ddda8e0a | 1358 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1359 | |
e27d359e | 1360 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1361 | /* |
1362 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1363 | * in the same way that wireshark does | |
1364 | * | |
1365 | * @fh: file handle | |
1366 | * | |
1367 | * For debugging only. | |
1368 | */ | |
1369 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1370 | { | |
1371 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1372 | * not on the result */ | |
1264a2f0 | 1373 | return nfs_fhandle_hash(fh); |
d8e0539e | 1374 | } |
9e6ee76d | 1375 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1376 | |
1377 | /* | |
20d27e92 CL |
1378 | * _nfs_display_fhandle - display an NFS file handle on the console |
1379 | * | |
1380 | * @fh: file handle to display | |
1381 | * @caption: display caption | |
1382 | * | |
1383 | * For debugging only. | |
1384 | */ | |
20d27e92 CL |
1385 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1386 | { | |
1387 | unsigned short i; | |
1388 | ||
fa68a1ba | 1389 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1390 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1391 | return; | |
1392 | } | |
1393 | ||
d8e0539e WAA |
1394 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1395 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1396 | for (i = 0; i < fh->size; i += 16) { |
1397 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1398 | ||
1399 | switch ((fh->size - i - 1) >> 2) { | |
1400 | case 0: | |
1401 | printk(KERN_DEFAULT " %08x\n", | |
1402 | be32_to_cpup(pos)); | |
1403 | break; | |
1404 | case 1: | |
1405 | printk(KERN_DEFAULT " %08x %08x\n", | |
1406 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1407 | break; | |
1408 | case 2: | |
1409 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1410 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1411 | be32_to_cpup(pos + 2)); | |
1412 | break; | |
1413 | default: | |
1414 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1415 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1416 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1417 | } | |
1418 | } | |
1419 | } | |
9e6ee76d | 1420 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1421 | #endif |
1422 | ||
a10ad176 TM |
1423 | /** |
1424 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1425 | * @inode - pointer to inode | |
1426 | * @fattr - attributes | |
1427 | * | |
1428 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1429 | * attributes got scheduled after another call carrying updated ones. | |
1430 | * | |
1431 | * To do so, the function first assumes that a more recent ctime means | |
1432 | * that the attributes in fattr are newer, however it also attempt to | |
1433 | * catch the case where ctime either didn't change, or went backwards | |
1434 | * (if someone reset the clock on the server) by looking at whether | |
1435 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1436 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1437 | * |
1438 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1439 | * more recent than the ones cached in the inode. | |
1440 | * | |
1441 | */ | |
1442 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1443 | { | |
1444 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1445 | ||
4704f0e2 | 1446 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
4704f0e2 | 1447 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1448 | } |
1449 | ||
d8c951c3 TM |
1450 | /* |
1451 | * Don't trust the change_attribute, mtime, ctime or size if | |
1452 | * a pnfs LAYOUTCOMMIT is outstanding | |
1453 | */ | |
1454 | static void nfs_inode_attrs_handle_layoutcommit(struct inode *inode, | |
1455 | struct nfs_fattr *fattr) | |
1456 | { | |
1457 | if (pnfs_layoutcommit_outstanding(inode)) | |
1458 | fattr->valid &= ~(NFS_ATTR_FATTR_CHANGE | | |
1459 | NFS_ATTR_FATTR_MTIME | | |
1460 | NFS_ATTR_FATTR_CTIME | | |
1461 | NFS_ATTR_FATTR_SIZE); | |
1462 | } | |
1463 | ||
a10ad176 TM |
1464 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1465 | { | |
f4ce1299 TM |
1466 | int ret; |
1467 | ||
1468 | trace_nfs_refresh_inode_enter(inode); | |
1469 | ||
d8c951c3 TM |
1470 | nfs_inode_attrs_handle_layoutcommit(inode, fattr); |
1471 | ||
a10ad176 | 1472 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1473 | ret = nfs_update_inode(inode, fattr); |
1474 | else | |
1475 | ret = nfs_check_inode_attributes(inode, fattr); | |
1476 | ||
1477 | trace_nfs_refresh_inode_exit(inode, ret); | |
1478 | return ret; | |
870a5be8 TM |
1479 | } |
1480 | ||
33801147 TM |
1481 | /** |
1482 | * nfs_refresh_inode - try to update the inode attribute cache | |
1483 | * @inode - pointer to inode | |
1484 | * @fattr - updated attributes | |
1485 | * | |
1486 | * Check that an RPC call that returned attributes has not overlapped with | |
1487 | * other recent updates of the inode metadata, then decide whether it is | |
1488 | * safe to do a full update of the inode attributes, or whether just to | |
1489 | * call nfs_check_inode_attributes. | |
1490 | */ | |
1491 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1492 | { | |
33801147 TM |
1493 | int status; |
1494 | ||
1495 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1496 | return 0; | |
1497 | spin_lock(&inode->i_lock); | |
870a5be8 | 1498 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1499 | spin_unlock(&inode->i_lock); |
ef79c097 | 1500 | |
33801147 TM |
1501 | return status; |
1502 | } | |
ddda8e0a | 1503 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1504 | |
d65f557f TM |
1505 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1506 | { | |
6edf9609 | 1507 | unsigned long invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
d65f557f | 1508 | |
aaae3f00 TM |
1509 | /* |
1510 | * Don't revalidate the pagecache if we hold a delegation, but do | |
1511 | * force an attribute update | |
1512 | */ | |
1513 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) | |
1514 | invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_FORCED; | |
1515 | ||
6edf9609 TM |
1516 | if (S_ISDIR(inode->i_mode)) |
1517 | invalid |= NFS_INO_INVALID_DATA; | |
1518 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1519 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1520 | return 0; | |
1521 | return nfs_refresh_inode_locked(inode, fattr); | |
1522 | } | |
1523 | ||
decf491f TM |
1524 | /** |
1525 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1526 | * @inode - pointer to inode | |
1527 | * @fattr - updated attributes | |
1528 | * | |
1529 | * After an operation that has changed the inode metadata, mark the | |
1530 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1531 | * |
1532 | * NB: if the server didn't return any post op attributes, this | |
1533 | * function will force the retrieval of attributes before the next | |
1534 | * NFS request. Thus it should be used only for operations that | |
1535 | * are expected to change one or more attributes, to avoid | |
1536 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1537 | */ |
1538 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1539 | { | |
d65f557f | 1540 | int status; |
decf491f | 1541 | |
7668fdbe | 1542 | spin_lock(&inode->i_lock); |
92d64e47 | 1543 | nfs_fattr_set_barrier(fattr); |
d65f557f | 1544 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1545 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1546 | |
870a5be8 | 1547 | return status; |
decf491f | 1548 | } |
1c606fb7 | 1549 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1550 | |
70ca8852 | 1551 | /** |
a08a8cd3 | 1552 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
70ca8852 TM |
1553 | * @inode - pointer to inode |
1554 | * @fattr - updated attributes | |
1555 | * | |
1556 | * After an operation that has changed the inode metadata, mark the | |
1557 | * attribute cache as being invalid, then try to update it. Fake up | |
1558 | * weak cache consistency data, if none exist. | |
1559 | * | |
1560 | * This function is mainly designed to be used by the ->write_done() functions. | |
1561 | */ | |
a08a8cd3 | 1562 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
70ca8852 | 1563 | { |
d65f557f TM |
1564 | int status; |
1565 | ||
d65f557f TM |
1566 | /* Don't do a WCC update if these attributes are already stale */ |
1567 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1568 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1569 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1570 | | NFS_ATTR_FATTR_PRESIZE | |
1571 | | NFS_ATTR_FATTR_PREMTIME | |
1572 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1573 | goto out_noforce; |
1574 | } | |
9e6e70f8 TM |
1575 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1576 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1577 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1578 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1579 | } |
9e6e70f8 TM |
1580 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1581 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1582 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1583 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1584 | } | |
1585 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1586 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1587 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1588 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1589 | } | |
1590 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1591 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1592 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1593 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1594 | } |
d65f557f TM |
1595 | out_noforce: |
1596 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
a08a8cd3 TM |
1597 | return status; |
1598 | } | |
1599 | ||
1600 | /** | |
1601 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1602 | * @inode - pointer to inode | |
1603 | * @fattr - updated attributes | |
1604 | * | |
1605 | * After an operation that has changed the inode metadata, mark the | |
1606 | * attribute cache as being invalid, then try to update it. Fake up | |
1607 | * weak cache consistency data, if none exist. | |
1608 | * | |
1609 | * This function is mainly designed to be used by the ->write_done() functions. | |
1610 | */ | |
1611 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1612 | { | |
1613 | int status; | |
1614 | ||
1615 | spin_lock(&inode->i_lock); | |
8f8ba1d7 | 1616 | nfs_fattr_set_barrier(fattr); |
a08a8cd3 | 1617 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
d65f557f TM |
1618 | spin_unlock(&inode->i_lock); |
1619 | return status; | |
70ca8852 | 1620 | } |
ddda8e0a | 1621 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1622 | |
ea96d1ec AS |
1623 | |
1624 | static inline bool nfs_fileid_valid(struct nfs_inode *nfsi, | |
1625 | struct nfs_fattr *fattr) | |
1626 | { | |
1627 | bool ret1 = true, ret2 = true; | |
1628 | ||
1629 | if (fattr->valid & NFS_ATTR_FATTR_FILEID) | |
1630 | ret1 = (nfsi->fileid == fattr->fileid); | |
1631 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1632 | ret2 = (nfsi->fileid == fattr->mounted_on_fileid); | |
1633 | return ret1 || ret2; | |
1634 | } | |
1635 | ||
1da177e4 LT |
1636 | /* |
1637 | * Many nfs protocol calls return the new file attributes after | |
1638 | * an operation. Here we update the inode to reflect the state | |
1639 | * of the server's inode. | |
1640 | * | |
1641 | * This is a bit tricky because we have to make sure all dirty pages | |
1642 | * have been sent off to the server before calling invalidate_inode_pages. | |
1643 | * To make sure no other process adds more write requests while we try | |
1644 | * our best to flush them, we make them sleep during the attribute refresh. | |
1645 | * | |
1646 | * A very similar scenario holds for the dir cache. | |
1647 | */ | |
24aa1fe6 | 1648 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1649 | { |
8b4bdcf8 | 1650 | struct nfs_server *server; |
1da177e4 | 1651 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1652 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1653 | unsigned long invalid = 0; |
3e7d950a | 1654 | unsigned long now = jiffies; |
62ab460c | 1655 | unsigned long save_cache_validity; |
ade14a7d | 1656 | bool cache_revalidated = true; |
1da177e4 | 1657 | |
1e8968c5 | 1658 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1659 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1660 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1661 | atomic_read(&inode->i_count), fattr->valid); |
1662 | ||
ea96d1ec | 1663 | if (!nfs_fileid_valid(nfsi, fattr)) { |
e73e6c9e MT |
1664 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
1665 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1666 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1667 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1668 | (long long)fattr->fileid); | |
1669 | goto out_err; | |
1670 | } | |
1da177e4 LT |
1671 | |
1672 | /* | |
1673 | * Make sure the inode's type hasn't changed. | |
1674 | */ | |
e73e6c9e MT |
1675 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1676 | /* | |
1677 | * Big trouble! The inode has become a different object. | |
1678 | */ | |
1e8968c5 | 1679 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1680 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1681 | goto out_err; | |
1682 | } | |
1da177e4 | 1683 | |
8b4bdcf8 | 1684 | server = NFS_SERVER(inode); |
a0356862 | 1685 | /* Update the fsid? */ |
9e6e70f8 | 1686 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1687 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1688 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1689 | server->fsid = fattr->fsid; |
1690 | ||
1da177e4 LT |
1691 | /* |
1692 | * Update the read time so we don't revalidate too often. | |
1693 | */ | |
33801147 | 1694 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1695 | |
62ab460c TM |
1696 | save_cache_validity = nfsi->cache_validity; |
1697 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1698 | | NFS_INO_INVALID_ATIME | |
1699 | | NFS_INO_REVAL_FORCED | |
1700 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1701 | |
a895b4a1 | 1702 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1703 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1704 | |
47aabaa7 | 1705 | /* More cache consistency checks */ |
9e6e70f8 | 1706 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1707 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1708 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1709 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1710 | invalid |= NFS_INO_INVALID_ATTR |
1711 | | NFS_INO_INVALID_DATA | |
1712 | | NFS_INO_INVALID_ACCESS | |
85a23cee | 1713 | | NFS_INO_INVALID_ACL; |
9e6e70f8 TM |
1714 | if (S_ISDIR(inode->i_mode)) |
1715 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1716 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1717 | } |
ade14a7d | 1718 | } else { |
43b6535e | 1719 | nfsi->cache_validity |= save_cache_validity; |
ade14a7d TM |
1720 | cache_revalidated = false; |
1721 | } | |
9e6e70f8 TM |
1722 | |
1723 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1724 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
ade14a7d | 1725 | } else if (server->caps & NFS_CAP_MTIME) { |
43b6535e TM |
1726 | nfsi->cache_validity |= save_cache_validity & |
1727 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1728 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1729 | cache_revalidated = false; |
1730 | } | |
62ab460c | 1731 | |
9e6e70f8 | 1732 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1733 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
ade14a7d | 1734 | } else if (server->caps & NFS_CAP_CTIME) { |
43b6535e TM |
1735 | nfsi->cache_validity |= save_cache_validity & |
1736 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1737 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1738 | cache_revalidated = false; |
1739 | } | |
47aabaa7 | 1740 | |
951a143b | 1741 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1742 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1743 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1744 | cur_isize = i_size_read(inode); | |
1745 | if (new_isize != cur_isize) { | |
1746 | /* Do we perhaps have any outstanding writes, or has | |
1747 | * the file grown beyond our last write? */ | |
cb1410c7 | 1748 | if ((nfsi->nrequests == 0) || new_isize > cur_isize) { |
9e6e70f8 TM |
1749 | i_size_write(inode, new_isize); |
1750 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1751 | } | |
60c16ea8 HJ |
1752 | dprintk("NFS: isize change on server for file %s/%ld " |
1753 | "(%Ld to %Ld)\n", | |
1754 | inode->i_sb->s_id, | |
1755 | inode->i_ino, | |
1756 | (long long)cur_isize, | |
1757 | (long long)new_isize); | |
1da177e4 | 1758 | } |
ade14a7d | 1759 | } else { |
43b6535e TM |
1760 | nfsi->cache_validity |= save_cache_validity & |
1761 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1762 | | NFS_INO_REVAL_PAGECACHE |
1763 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1764 | cache_revalidated = false; |
1765 | } | |
1da177e4 | 1766 | |
1da177e4 | 1767 | |
9e6e70f8 TM |
1768 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1769 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
ade14a7d | 1770 | else if (server->caps & NFS_CAP_ATIME) { |
43b6535e TM |
1771 | nfsi->cache_validity |= save_cache_validity & |
1772 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1773 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1774 | cache_revalidated = false; |
1775 | } | |
1da177e4 | 1776 | |
9e6e70f8 TM |
1777 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1778 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1779 | umode_t newmode = inode->i_mode & S_IFMT; |
1780 | newmode |= fattr->mode & S_IALLUGO; | |
1781 | inode->i_mode = newmode; | |
9e6e70f8 | 1782 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1783 | } |
ade14a7d | 1784 | } else if (server->caps & NFS_CAP_MODE) { |
43b6535e TM |
1785 | nfsi->cache_validity |= save_cache_validity & |
1786 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1787 | | NFS_INO_INVALID_ACCESS |
1788 | | NFS_INO_INVALID_ACL | |
1789 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1790 | cache_revalidated = false; |
1791 | } | |
62ab460c | 1792 | |
9e6e70f8 | 1793 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1794 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1795 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1796 | inode->i_uid = fattr->uid; | |
1797 | } | |
ade14a7d | 1798 | } else if (server->caps & NFS_CAP_OWNER) { |
43b6535e TM |
1799 | nfsi->cache_validity |= save_cache_validity & |
1800 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1801 | | NFS_INO_INVALID_ACCESS |
1802 | | NFS_INO_INVALID_ACL | |
1803 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1804 | cache_revalidated = false; |
1805 | } | |
62ab460c | 1806 | |
9e6e70f8 | 1807 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1808 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1809 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1810 | inode->i_gid = fattr->gid; | |
1811 | } | |
ade14a7d | 1812 | } else if (server->caps & NFS_CAP_OWNER_GROUP) { |
43b6535e TM |
1813 | nfsi->cache_validity |= save_cache_validity & |
1814 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1815 | | NFS_INO_INVALID_ACCESS |
1816 | | NFS_INO_INVALID_ACL | |
1817 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1818 | cache_revalidated = false; |
1819 | } | |
921615f1 | 1820 | |
9e6e70f8 TM |
1821 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1822 | if (inode->i_nlink != fattr->nlink) { | |
1823 | invalid |= NFS_INO_INVALID_ATTR; | |
1824 | if (S_ISDIR(inode->i_mode)) | |
1825 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1826 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1827 | } |
ade14a7d | 1828 | } else if (server->caps & NFS_CAP_NLINK) { |
43b6535e TM |
1829 | nfsi->cache_validity |= save_cache_validity & |
1830 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1831 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1832 | cache_revalidated = false; |
1833 | } | |
1da177e4 | 1834 | |
9e6e70f8 | 1835 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1836 | /* |
1837 | * report the blocks in 512byte units | |
1838 | */ | |
1839 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
ade14a7d | 1840 | } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
9e6e70f8 | 1841 | inode->i_blocks = fattr->du.nfs2.blocks; |
ade14a7d TM |
1842 | else |
1843 | cache_revalidated = false; | |
1da177e4 LT |
1844 | |
1845 | /* Update attrtimeo value if we're out of the unstable period */ | |
fd1defc2 | 1846 | if (invalid & NFS_INO_INVALID_ATTR) { |
91d5b470 | 1847 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1848 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1849 | nfsi->attrtimeo_timestamp = now; |
f5062003 | 1850 | /* Set barrier to be more recent than all outstanding updates */ |
4704f0e2 | 1851 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1852 | } else { |
ade14a7d TM |
1853 | if (cache_revalidated) { |
1854 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, | |
1855 | nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { | |
1856 | nfsi->attrtimeo <<= 1; | |
1857 | if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode)) | |
1858 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1859 | } | |
6d2b2966 TM |
1860 | nfsi->attrtimeo_timestamp = now; |
1861 | } | |
f5062003 TM |
1862 | /* Set the barrier to be more recent than this fattr */ |
1863 | if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) | |
1864 | nfsi->attr_gencount = fattr->gencount; | |
1da177e4 | 1865 | } |
c812012f JL |
1866 | |
1867 | /* Don't declare attrcache up to date if there were no attrs! */ | |
ade14a7d | 1868 | if (cache_revalidated) |
c812012f JL |
1869 | invalid &= ~NFS_INO_INVALID_ATTR; |
1870 | ||
1da177e4 LT |
1871 | /* Don't invalidate the data if we were to blame */ |
1872 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1873 | || S_ISLNK(inode->i_mode))) | |
1874 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1875 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1876 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
6edf9609 | 1877 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 1878 | |
1da177e4 | 1879 | return 0; |
b37b03b7 | 1880 | out_err: |
1da177e4 LT |
1881 | /* |
1882 | * No need to worry about unhashing the dentry, as the | |
1883 | * lookup validation will know that the inode is bad. | |
1884 | * (But we fall through to invalidate the caches.) | |
1885 | */ | |
1886 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1887 | return -ESTALE; |
1888 | } | |
1889 | ||
f7b422b1 | 1890 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1891 | { |
1892 | struct nfs_inode *nfsi; | |
c456aacf | 1893 | nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1894 | if (!nfsi) |
1895 | return NULL; | |
55296809 CL |
1896 | nfsi->flags = 0UL; |
1897 | nfsi->cache_validity = 0UL; | |
89d77c8f | 1898 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1899 | nfsi->nfs4_acl = NULL; |
1900 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1901 | return &nfsi->vfs_inode; |
1902 | } | |
89d77c8f | 1903 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1904 | |
fa0d7e3d | 1905 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1906 | { |
fa0d7e3d | 1907 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1908 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1909 | } | |
1910 | ||
fa0d7e3d NP |
1911 | void nfs_destroy_inode(struct inode *inode) |
1912 | { | |
1913 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1914 | } | |
89d77c8f | 1915 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1916 | |
d75d5414 AM |
1917 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1918 | { | |
89d77c8f | 1919 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1920 | INIT_LIST_HEAD(&nfsi->open_states); |
1921 | nfsi->delegation = NULL; | |
d75d5414 | 1922 | init_rwsem(&nfsi->rwsem); |
e5e94017 | 1923 | nfsi->layout = NULL; |
d75d5414 AM |
1924 | #endif |
1925 | } | |
f7b422b1 | 1926 | |
51cc5068 | 1927 | static void init_once(void *foo) |
1da177e4 LT |
1928 | { |
1929 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1930 | ||
a35afb83 | 1931 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1932 | INIT_LIST_HEAD(&nfsi->open_files); |
1933 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1934 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1935 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
cb1410c7 | 1936 | nfsi->nrequests = 0; |
ea2cf228 | 1937 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1938 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1939 | atomic_set(&nfsi->silly_count, 1); |
1940 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1941 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1942 | nfs4_init_once(nfsi); |
1da177e4 | 1943 | } |
20c2df83 | 1944 | |
f7b422b1 | 1945 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1946 | { |
1947 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1948 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1949 | 0, (SLAB_RECLAIM_ACCOUNT| |
1950 | SLAB_MEM_SPREAD), | |
20c2df83 | 1951 | init_once); |
1da177e4 LT |
1952 | if (nfs_inode_cachep == NULL) |
1953 | return -ENOMEM; | |
1954 | ||
1955 | return 0; | |
1956 | } | |
1957 | ||
266bee88 | 1958 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1959 | { |
8c0a8537 KS |
1960 | /* |
1961 | * Make sure all delayed rcu free inodes are flushed before we | |
1962 | * destroy cache. | |
1963 | */ | |
1964 | rcu_barrier(); | |
1a1d92c1 | 1965 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1966 | } |
1967 | ||
5746006f | 1968 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1969 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1970 | |
1971 | /* | |
1972 | * start up the nfsiod workqueue | |
1973 | */ | |
1974 | static int nfsiod_start(void) | |
1975 | { | |
1976 | struct workqueue_struct *wq; | |
1977 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1978 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1979 | if (wq == NULL) |
1980 | return -ENOMEM; | |
1981 | nfsiod_workqueue = wq; | |
1982 | return 0; | |
1983 | } | |
1984 | ||
1985 | /* | |
1986 | * Destroy the nfsiod workqueue | |
1987 | */ | |
1988 | static void nfsiod_stop(void) | |
1989 | { | |
1990 | struct workqueue_struct *wq; | |
1991 | ||
1992 | wq = nfsiod_workqueue; | |
1993 | if (wq == NULL) | |
1994 | return; | |
1995 | nfsiod_workqueue = NULL; | |
1996 | destroy_workqueue(wq); | |
1997 | } | |
1998 | ||
1b340d01 | 1999 | int nfs_net_id; |
9e2e74db | 2000 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
2001 | |
2002 | static int nfs_net_init(struct net *net) | |
2003 | { | |
6b13168b | 2004 | nfs_clients_init(net); |
65b38851 | 2005 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
2006 | } |
2007 | ||
2008 | static void nfs_net_exit(struct net *net) | |
2009 | { | |
65b38851 | 2010 | nfs_fs_proc_net_exit(net); |
28cd1b3f | 2011 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
2012 | } |
2013 | ||
2014 | static struct pernet_operations nfs_net_ops = { | |
2015 | .init = nfs_net_init, | |
2016 | .exit = nfs_net_exit, | |
2017 | .id = &nfs_net_id, | |
2018 | .size = sizeof(struct nfs_net), | |
2019 | }; | |
2020 | ||
1da177e4 LT |
2021 | /* |
2022 | * Initialize NFS | |
2023 | */ | |
2024 | static int __init init_nfs_fs(void) | |
2025 | { | |
2026 | int err; | |
2027 | ||
1b340d01 | 2028 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 2029 | if (err < 0) |
89d77c8f | 2030 | goto out9; |
e571cbf1 | 2031 | |
8ec442ae DH |
2032 | err = nfs_fscache_register(); |
2033 | if (err < 0) | |
89d77c8f | 2034 | goto out8; |
8ec442ae | 2035 | |
5746006f TM |
2036 | err = nfsiod_start(); |
2037 | if (err) | |
89d77c8f | 2038 | goto out7; |
5746006f | 2039 | |
6aaca566 DH |
2040 | err = nfs_fs_proc_init(); |
2041 | if (err) | |
89d77c8f | 2042 | goto out6; |
6aaca566 | 2043 | |
1da177e4 LT |
2044 | err = nfs_init_nfspagecache(); |
2045 | if (err) | |
89d77c8f | 2046 | goto out5; |
1da177e4 LT |
2047 | |
2048 | err = nfs_init_inodecache(); | |
2049 | if (err) | |
89d77c8f | 2050 | goto out4; |
1da177e4 LT |
2051 | |
2052 | err = nfs_init_readpagecache(); | |
2053 | if (err) | |
89d77c8f | 2054 | goto out3; |
1da177e4 LT |
2055 | |
2056 | err = nfs_init_writepagecache(); | |
2057 | if (err) | |
89d77c8f | 2058 | goto out2; |
1da177e4 | 2059 | |
1da177e4 LT |
2060 | err = nfs_init_directcache(); |
2061 | if (err) | |
89d77c8f | 2062 | goto out1; |
1da177e4 | 2063 | |
ec7652aa | 2064 | rpc_proc_register(&init_net, &nfs_rpcstat); |
cd738ee9 KM |
2065 | |
2066 | err = register_nfs_fs(); | |
2067 | if (err) | |
129d1977 BS |
2068 | goto out0; |
2069 | ||
1da177e4 | 2070 | return 0; |
129d1977 | 2071 | out0: |
ec7652aa | 2072 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2073 | nfs_destroy_directcache(); |
89d77c8f | 2074 | out1: |
129d1977 | 2075 | nfs_destroy_writepagecache(); |
89d77c8f | 2076 | out2: |
129d1977 | 2077 | nfs_destroy_readpagecache(); |
89d77c8f | 2078 | out3: |
129d1977 | 2079 | nfs_destroy_inodecache(); |
89d77c8f | 2080 | out4: |
129d1977 | 2081 | nfs_destroy_nfspagecache(); |
89d77c8f | 2082 | out5: |
129d1977 | 2083 | nfs_fs_proc_exit(); |
89d77c8f | 2084 | out6: |
129d1977 | 2085 | nfsiod_stop(); |
89d77c8f | 2086 | out7: |
129d1977 | 2087 | nfs_fscache_unregister(); |
89d77c8f | 2088 | out8: |
129d1977 | 2089 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 2090 | out9: |
1da177e4 LT |
2091 | return err; |
2092 | } | |
2093 | ||
2094 | static void __exit exit_nfs_fs(void) | |
2095 | { | |
1da177e4 | 2096 | nfs_destroy_directcache(); |
1da177e4 LT |
2097 | nfs_destroy_writepagecache(); |
2098 | nfs_destroy_readpagecache(); | |
2099 | nfs_destroy_inodecache(); | |
2100 | nfs_destroy_nfspagecache(); | |
8ec442ae | 2101 | nfs_fscache_unregister(); |
1b340d01 | 2102 | unregister_pernet_subsys(&nfs_net_ops); |
ec7652aa | 2103 | rpc_proc_unregister(&init_net, "nfs"); |
f7b422b1 | 2104 | unregister_nfs_fs(); |
6aaca566 | 2105 | nfs_fs_proc_exit(); |
5746006f | 2106 | nfsiod_stop(); |
1da177e4 LT |
2107 | } |
2108 | ||
2109 | /* Not quite true; I just maintain it */ | |
2110 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2111 | MODULE_LICENSE("GPL"); | |
f43bf0be | 2112 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
2113 | |
2114 | module_init(init_nfs_fs) | |
2115 | module_exit(exit_nfs_fs) |