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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 LT |
390 | inode->i_data.a_ops = &nfs_file_aops; |
391 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
392 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 393 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 394 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 395 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 396 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
397 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
398 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
399 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
400 | inode->i_op = &nfs_referral_inode_operations; | |
401 | else | |
402 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 403 | inode->i_fop = NULL; |
36d43a43 | 404 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 405 | } |
1da177e4 LT |
406 | } else if (S_ISLNK(inode->i_mode)) |
407 | inode->i_op = &nfs_symlink_inode_operations; | |
408 | else | |
409 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
410 | ||
9e6e70f8 TM |
411 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
412 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
413 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 414 | inode->i_version = 0; |
9e6e70f8 | 415 | inode->i_size = 0; |
6d6b77f1 | 416 | clear_nlink(inode); |
9ff593c4 EB |
417 | inode->i_uid = make_kuid(&init_user_ns, -2); |
418 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
419 | inode->i_blocks = 0; |
420 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
421 | nfsi->write_io = 0; |
422 | nfsi->read_io = 0; | |
9e6e70f8 | 423 | |
33801147 | 424 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 425 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
426 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
427 | inode->i_atime = fattr->atime; | |
62ab460c | 428 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
6edf9609 | 429 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
430 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
431 | inode->i_mtime = fattr->mtime; | |
62ab460c | 432 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
6edf9609 | 433 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
434 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
435 | inode->i_ctime = fattr->ctime; | |
62ab460c | 436 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
6edf9609 | 437 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 | 438 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 439 | inode->i_version = fattr->change_attr; |
62ab460c | 440 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
6edf9609 | 441 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
442 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
443 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 444 | else |
6edf9609 TM |
445 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
446 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 | 447 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 448 | set_nlink(inode, fattr->nlink); |
62ab460c | 449 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
6edf9609 | 450 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
451 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
452 | inode->i_uid = fattr->uid; | |
62ab460c | 453 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
6edf9609 | 454 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
455 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
456 | inode->i_gid = fattr->gid; | |
62ab460c | 457 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
6edf9609 | 458 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
459 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
460 | inode->i_blocks = fattr->du.nfs2.blocks; | |
461 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
462 | /* |
463 | * report the blocks in 512byte units | |
464 | */ | |
465 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 466 | } |
aa9c2669 DQ |
467 | |
468 | nfs_setsecurity(inode, fattr, label); | |
469 | ||
1da177e4 | 470 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 471 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 472 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 473 | |
f1fe29b4 | 474 | nfs_fscache_init_inode(inode); |
ef79c097 | 475 | |
1da177e4 LT |
476 | unlock_new_inode(inode); |
477 | } else | |
478 | nfs_refresh_inode(inode, fattr); | |
1e8968c5 | 479 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 480 | inode->i_sb->s_id, |
1e8968c5 | 481 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 482 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
483 | atomic_read(&inode->i_count)); |
484 | ||
485 | out: | |
486 | return inode; | |
487 | ||
488 | out_no_inode: | |
03f28e3a | 489 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
490 | goto out; |
491 | } | |
89d77c8f | 492 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 493 | |
536e43d1 | 494 | #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 |
495 | |
496 | int | |
497 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
498 | { | |
499 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
500 | struct nfs_fattr *fattr; |
501 | int error = -ENOMEM; | |
1da177e4 | 502 | |
91d5b470 CL |
503 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
504 | ||
188b95dd JL |
505 | /* skip mode change if it's just for clearing setuid/setgid */ |
506 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
507 | attr->ia_valid &= ~ATTR_MODE; | |
508 | ||
1da177e4 | 509 | if (attr->ia_valid & ATTR_SIZE) { |
08a899d5 CH |
510 | BUG_ON(!S_ISREG(inode->i_mode)); |
511 | ||
512 | if (attr->ia_size == i_size_read(inode)) | |
1da177e4 LT |
513 | attr->ia_valid &= ~ATTR_SIZE; |
514 | } | |
515 | ||
516 | /* Optimization: if the end result is no change, don't RPC */ | |
517 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 518 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
519 | return 0; |
520 | ||
f4ce1299 TM |
521 | trace_nfs_setattr_enter(inode); |
522 | ||
755c1e20 | 523 | /* Write all dirty data */ |
1d59d61f TM |
524 | if (S_ISREG(inode->i_mode)) { |
525 | nfs_inode_dio_wait(inode); | |
e1552e19 | 526 | nfs_wb_all(inode); |
1d59d61f | 527 | } |
987f8dfc TM |
528 | |
529 | fattr = nfs_alloc_fattr(); | |
530 | if (fattr == NULL) | |
531 | goto out; | |
642ac549 TM |
532 | /* |
533 | * Return any delegations if we're going to change ACLs | |
534 | */ | |
535 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 536 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 537 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 538 | if (error == 0) |
aa9c2669 | 539 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
540 | nfs_free_fattr(fattr); |
541 | out: | |
f4ce1299 | 542 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
543 | return error; |
544 | } | |
ddda8e0a | 545 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 546 | |
a3d01454 TM |
547 | /** |
548 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
549 | * @inode: inode of the file used | |
550 | * @offset: file offset to start truncating | |
551 | * | |
552 | * This is a copy of the common vmtruncate, but with the locking | |
553 | * corrected to take into account the fact that NFS requires | |
554 | * inode->i_size to be updated under the inode->i_lock. | |
555 | */ | |
556 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
557 | { | |
c08d3b0e | 558 | int err; |
a3d01454 | 559 | |
c08d3b0e | 560 | err = inode_newsize_ok(inode, offset); |
561 | if (err) | |
562 | goto out; | |
a3d01454 | 563 | |
c08d3b0e | 564 | spin_lock(&inode->i_lock); |
c08d3b0e | 565 | i_size_write(inode, offset); |
6edf9609 TM |
566 | /* Optimisation */ |
567 | if (offset == 0) | |
568 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA; | |
c08d3b0e | 569 | spin_unlock(&inode->i_lock); |
570 | ||
7caef267 | 571 | truncate_pagecache(inode, offset); |
c08d3b0e | 572 | out: |
573 | return err; | |
a3d01454 TM |
574 | } |
575 | ||
65e4308d TM |
576 | /** |
577 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
578 | * @inode: pointer to struct inode | |
579 | * @attr: pointer to struct iattr | |
580 | * | |
581 | * Note: we do this in the *proc.c in order to ensure that | |
582 | * it works for things like exclusive creates too. | |
583 | */ | |
584 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
585 | { | |
586 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 587 | spin_lock(&inode->i_lock); |
1da177e4 | 588 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
589 | int mode = attr->ia_mode & S_IALLUGO; |
590 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
591 | inode->i_mode = mode; |
592 | } | |
593 | if ((attr->ia_valid & ATTR_UID) != 0) | |
594 | inode->i_uid = attr->ia_uid; | |
595 | if ((attr->ia_valid & ATTR_GID) != 0) | |
596 | inode->i_gid = attr->ia_gid; | |
6edf9609 TM |
597 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
598 | | NFS_INO_INVALID_ACL); | |
dc59250c | 599 | spin_unlock(&inode->i_lock); |
65e4308d TM |
600 | } |
601 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 602 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 603 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 604 | } |
1da177e4 | 605 | } |
ddda8e0a | 606 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 607 | |
311324ad TM |
608 | static void nfs_request_parent_use_readdirplus(struct dentry *dentry) |
609 | { | |
610 | struct dentry *parent; | |
611 | ||
612 | parent = dget_parent(dentry); | |
613 | nfs_force_use_readdirplus(parent->d_inode); | |
614 | dput(parent); | |
615 | } | |
616 | ||
617 | static bool nfs_need_revalidate_inode(struct inode *inode) | |
618 | { | |
619 | if (NFS_I(inode)->cache_validity & | |
620 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
621 | return true; | |
622 | if (nfs_attribute_cache_expired(inode)) | |
623 | return true; | |
624 | return false; | |
625 | } | |
626 | ||
1da177e4 LT |
627 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
628 | { | |
629 | struct inode *inode = dentry->d_inode; | |
55296809 | 630 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
16caf5b6 | 631 | int err = 0; |
1da177e4 | 632 | |
f4ce1299 | 633 | trace_nfs_getattr_enter(inode); |
acdc53b2 | 634 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 635 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 636 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
637 | err = filemap_write_and_wait(inode->i_mapping); |
638 | if (err) | |
639 | goto out; | |
28c494c5 | 640 | } |
fc33a7bb CH |
641 | |
642 | /* | |
643 | * We may force a getattr if the user cares about atime. | |
644 | * | |
645 | * Note that we only have to check the vfsmount flags here: | |
646 | * - NFS always sets S_NOATIME by so checking it would give a | |
647 | * bogus result | |
648 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
649 | * no point in checking those. | |
650 | */ | |
651 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
652 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 653 | need_atime = 0; |
fc33a7bb | 654 | |
311324ad TM |
655 | if (need_atime || nfs_need_revalidate_inode(inode)) { |
656 | struct nfs_server *server = NFS_SERVER(inode); | |
657 | ||
658 | if (server->caps & NFS_CAP_READDIRPLUS) | |
659 | nfs_request_parent_use_readdirplus(dentry); | |
660 | err = __nfs_revalidate_inode(server, inode); | |
661 | } | |
4e769b93 | 662 | if (!err) { |
1da177e4 | 663 | generic_fillattr(inode, stat); |
f43bf0be | 664 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 665 | } |
acdc53b2 | 666 | out: |
f4ce1299 | 667 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
668 | return err; |
669 | } | |
ddda8e0a | 670 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 671 | |
f11ac8db TM |
672 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
673 | { | |
674 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
675 | l_ctx->lockowner.l_owner = current->files; |
676 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 677 | INIT_LIST_HEAD(&l_ctx->list); |
577b4232 | 678 | nfs_iocounter_init(&l_ctx->io_count); |
f11ac8db TM |
679 | } |
680 | ||
681 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
682 | { | |
8c86899f TM |
683 | struct nfs_lock_context *head = &ctx->lock_context; |
684 | struct nfs_lock_context *pos = head; | |
f11ac8db | 685 | |
8c86899f | 686 | do { |
2a369153 | 687 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 688 | continue; |
2a369153 | 689 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
690 | continue; |
691 | atomic_inc(&pos->count); | |
692 | return pos; | |
8c86899f | 693 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
694 | return NULL; |
695 | } | |
696 | ||
697 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
698 | { | |
699 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 700 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
701 | |
702 | spin_lock(&inode->i_lock); | |
703 | res = __nfs_find_lock_context(ctx); | |
704 | if (res == NULL) { | |
705 | spin_unlock(&inode->i_lock); | |
706 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
707 | if (new == NULL) | |
b3c54de6 | 708 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
709 | nfs_init_lock_context(new); |
710 | spin_lock(&inode->i_lock); | |
711 | res = __nfs_find_lock_context(ctx); | |
712 | if (res == NULL) { | |
713 | list_add_tail(&new->list, &ctx->lock_context.list); | |
714 | new->open_context = ctx; | |
715 | res = new; | |
716 | new = NULL; | |
717 | } | |
718 | } | |
719 | spin_unlock(&inode->i_lock); | |
720 | kfree(new); | |
721 | return res; | |
722 | } | |
1c6dcbe5 | 723 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
724 | |
725 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
726 | { | |
727 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 728 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
729 | |
730 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
731 | return; | |
732 | list_del(&l_ctx->list); | |
733 | spin_unlock(&inode->i_lock); | |
734 | kfree(l_ctx); | |
735 | } | |
1c6dcbe5 | 736 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 737 | |
7fe5c398 TM |
738 | /** |
739 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
740 | * @ctx: pointer to context | |
741 | * @is_sync: is this a synchronous close | |
742 | * | |
743 | * always ensure that the attributes are up to date if we're mounted | |
744 | * with close-to-open semantics | |
745 | */ | |
746 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
747 | { | |
748 | struct inode *inode; | |
749 | struct nfs_server *server; | |
750 | ||
751 | if (!(ctx->mode & FMODE_WRITE)) | |
752 | return; | |
753 | if (!is_sync) | |
754 | return; | |
3d4ff43d | 755 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
756 | if (!list_empty(&NFS_I(inode)->open_files)) |
757 | return; | |
758 | server = NFS_SERVER(inode); | |
759 | if (server->flags & NFS_MOUNT_NOCTO) | |
760 | return; | |
761 | nfs_revalidate_inode(server, inode); | |
762 | } | |
ddda8e0a | 763 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 764 | |
5ede7b1c | 765 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
766 | { |
767 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
768 | struct rpc_cred *cred = rpc_lookup_cred(); |
769 | if (IS_ERR(cred)) | |
770 | return ERR_CAST(cred); | |
1da177e4 | 771 | |
f52720ca | 772 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
773 | if (!ctx) { |
774 | put_rpccred(cred); | |
775 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 776 | } |
5ede7b1c AV |
777 | nfs_sb_active(dentry->d_sb); |
778 | ctx->dentry = dget(dentry); | |
779 | ctx->cred = cred; | |
780 | ctx->state = NULL; | |
781 | ctx->mode = f_mode; | |
782 | ctx->flags = 0; | |
783 | ctx->error = 0; | |
784 | nfs_init_lock_context(&ctx->lock_context); | |
785 | ctx->lock_context.open_context = ctx; | |
786 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 787 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
788 | return ctx; |
789 | } | |
89d77c8f | 790 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
791 | |
792 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
793 | { | |
794 | if (ctx != NULL) | |
f11ac8db | 795 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
796 | return ctx; |
797 | } | |
89d77c8f | 798 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 799 | |
7fe5c398 | 800 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 801 | { |
3d4ff43d AV |
802 | struct inode *inode = ctx->dentry->d_inode; |
803 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 804 | |
5c78f58e | 805 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
806 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
807 | return; | |
808 | list_del(&ctx->list); | |
809 | spin_unlock(&inode->i_lock); | |
ef84303e | 810 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 811 | return; |
5c78f58e TM |
812 | if (inode != NULL) |
813 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
814 | if (ctx->cred != NULL) |
815 | put_rpccred(ctx->cred); | |
3d4ff43d | 816 | dput(ctx->dentry); |
322b2b90 | 817 | nfs_sb_deactive(sb); |
82be417a | 818 | kfree(ctx->mdsthreshold); |
3bec63db TM |
819 | kfree(ctx); |
820 | } | |
821 | ||
a49c3c77 TM |
822 | void put_nfs_open_context(struct nfs_open_context *ctx) |
823 | { | |
824 | __put_nfs_open_context(ctx, 0); | |
825 | } | |
89d77c8f | 826 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 827 | |
1da177e4 LT |
828 | /* |
829 | * Ensure that mmap has a recent RPC credential for use when writing out | |
830 | * shared pages | |
831 | */ | |
c45ffdd2 | 832 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 833 | { |
c45ffdd2 | 834 | struct inode *inode = ctx->dentry->d_inode; |
1da177e4 LT |
835 | struct nfs_inode *nfsi = NFS_I(inode); |
836 | ||
1da177e4 LT |
837 | spin_lock(&inode->i_lock); |
838 | list_add(&ctx->list, &nfsi->open_files); | |
839 | spin_unlock(&inode->i_lock); | |
840 | } | |
c45ffdd2 TM |
841 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
842 | ||
843 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
844 | { | |
845 | filp->private_data = get_nfs_open_context(ctx); | |
846 | if (list_empty(&ctx->list)) | |
847 | nfs_inode_attach_open_context(ctx); | |
848 | } | |
89d77c8f | 849 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 850 | |
d530838b TM |
851 | /* |
852 | * Given an inode, search for an open context with the desired characteristics | |
853 | */ | |
dc0b027d | 854 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
855 | { |
856 | struct nfs_inode *nfsi = NFS_I(inode); | |
857 | struct nfs_open_context *pos, *ctx = NULL; | |
858 | ||
859 | spin_lock(&inode->i_lock); | |
860 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
861 | if (cred != NULL && pos->cred != cred) |
862 | continue; | |
1544fa0f TM |
863 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
864 | continue; | |
865 | ctx = get_nfs_open_context(pos); | |
866 | break; | |
1da177e4 LT |
867 | } |
868 | spin_unlock(&inode->i_lock); | |
869 | return ctx; | |
870 | } | |
871 | ||
b92dccf6 | 872 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 873 | { |
cd3758e3 | 874 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
875 | |
876 | if (ctx) { | |
c45ffdd2 TM |
877 | struct inode *inode = ctx->dentry->d_inode; |
878 | ||
1da177e4 LT |
879 | filp->private_data = NULL; |
880 | spin_lock(&inode->i_lock); | |
881 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
882 | spin_unlock(&inode->i_lock); | |
f895c53f | 883 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
884 | } |
885 | } | |
886 | ||
887 | /* | |
888 | * These allocate and release file read/write context information. | |
889 | */ | |
890 | int nfs_open(struct inode *inode, struct file *filp) | |
891 | { | |
892 | struct nfs_open_context *ctx; | |
1da177e4 | 893 | |
5ede7b1c AV |
894 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
895 | if (IS_ERR(ctx)) | |
896 | return PTR_ERR(ctx); | |
1da177e4 LT |
897 | nfs_file_set_open_context(filp, ctx); |
898 | put_nfs_open_context(ctx); | |
f1fe29b4 | 899 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
900 | return 0; |
901 | } | |
902 | ||
903 | int nfs_release(struct inode *inode, struct file *filp) | |
904 | { | |
1da177e4 LT |
905 | nfs_file_clear_open_context(filp); |
906 | return 0; | |
907 | } | |
908 | ||
909 | /* | |
910 | * This function is called whenever some part of NFS notices that | |
911 | * the cached attributes have to be refreshed. | |
912 | */ | |
913 | int | |
914 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
915 | { | |
916 | int status = -ESTALE; | |
1775fd3e | 917 | struct nfs4_label *label = NULL; |
a3cba2aa | 918 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 919 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 920 | |
1e8968c5 NV |
921 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
922 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 923 | |
f4ce1299 TM |
924 | trace_nfs_revalidate_inode_enter(inode); |
925 | ||
85233a7a | 926 | if (is_bad_inode(inode)) |
691beb13 | 927 | goto out; |
1da177e4 | 928 | if (NFS_STALE(inode)) |
412d582e | 929 | goto out; |
7fdc49c4 | 930 | |
a3cba2aa TM |
931 | status = -ENOMEM; |
932 | fattr = nfs_alloc_fattr(); | |
933 | if (fattr == NULL) | |
934 | goto out; | |
935 | ||
691beb13 | 936 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
937 | |
938 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
939 | if (IS_ERR(label)) { | |
940 | status = PTR_ERR(label); | |
941 | goto out; | |
942 | } | |
943 | ||
1775fd3e | 944 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 | 945 | if (status != 0) { |
1e8968c5 | 946 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 947 | inode->i_sb->s_id, |
1e8968c5 | 948 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
949 | if (status == -ESTALE) { |
950 | nfs_zap_caches(inode); | |
951 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 952 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 953 | } |
14c43f76 | 954 | goto err_out; |
1da177e4 LT |
955 | } |
956 | ||
a3cba2aa | 957 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 958 | if (status) { |
1e8968c5 | 959 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 960 | inode->i_sb->s_id, |
1e8968c5 | 961 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 962 | goto err_out; |
1da177e4 | 963 | } |
55296809 | 964 | |
24aa1fe6 | 965 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 966 | nfs_zap_acl_cache(inode); |
55296809 | 967 | |
3da580aa JL |
968 | nfs_setsecurity(inode, fattr, label); |
969 | ||
1e8968c5 | 970 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 971 | inode->i_sb->s_id, |
1e8968c5 | 972 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 973 | |
14c43f76 DQ |
974 | err_out: |
975 | nfs4_label_free(label); | |
976 | out: | |
a3cba2aa | 977 | nfs_free_fattr(fattr); |
f4ce1299 | 978 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
979 | return status; |
980 | } | |
981 | ||
982 | int nfs_attribute_timeout(struct inode *inode) | |
983 | { | |
984 | struct nfs_inode *nfsi = NFS_I(inode); | |
985 | ||
d7cf8dd0 TM |
986 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
987 | } | |
988 | ||
43f291cd | 989 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 990 | { |
b4d2314b | 991 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 992 | return 0; |
d7cf8dd0 | 993 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
994 | } |
995 | ||
996 | /** | |
997 | * nfs_revalidate_inode - Revalidate the inode attributes | |
998 | * @server - pointer to nfs_server struct | |
999 | * @inode - pointer to inode struct | |
1000 | * | |
1001 | * Updates inode attribute information by retrieving the data from the server. | |
1002 | */ | |
1003 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1004 | { | |
311324ad | 1005 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1006 | return NFS_STALE(inode) ? -ESTALE : 0; |
1007 | return __nfs_revalidate_inode(server, inode); | |
1008 | } | |
1c606fb7 | 1009 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1010 | |
912a108d N |
1011 | int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode) |
1012 | { | |
1013 | if (!(NFS_I(inode)->cache_validity & | |
1014 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
1015 | && !nfs_attribute_cache_expired(inode)) | |
1016 | return NFS_STALE(inode) ? -ESTALE : 0; | |
1017 | return -ECHILD; | |
1018 | } | |
1019 | ||
1cda707d | 1020 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1021 | { |
1022 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1023 | int ret; |
1024 | ||
717d44e8 | 1025 | if (mapping->nrpages != 0) { |
f8806c84 TM |
1026 | if (S_ISREG(inode->i_mode)) { |
1027 | ret = nfs_sync_mapping(mapping); | |
1028 | if (ret < 0) | |
1029 | return ret; | |
1030 | } | |
1031 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1032 | if (ret < 0) |
1033 | return ret; | |
1034 | } | |
d529ef83 JL |
1035 | if (S_ISDIR(inode->i_mode)) { |
1036 | spin_lock(&inode->i_lock); | |
717d44e8 | 1037 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1038 | spin_unlock(&inode->i_lock); |
1039 | } | |
717d44e8 | 1040 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1041 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1042 | |
1e8968c5 NV |
1043 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1044 | inode->i_sb->s_id, | |
1045 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1046 | return 0; |
1047 | } | |
1048 | ||
b4b1eadf TM |
1049 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
1050 | { | |
1051 | if (nfs_have_delegated_attributes(inode)) | |
1052 | return false; | |
1053 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
1054 | || nfs_attribute_timeout(inode) | |
1055 | || NFS_STALE(inode); | |
1056 | } | |
1057 | ||
717d44e8 TM |
1058 | /** |
1059 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1060 | * @inode - pointer to host inode | |
1061 | * @mapping - pointer to mapping | |
717d44e8 TM |
1062 | */ |
1063 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1064 | { | |
1065 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1066 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1067 | int ret = 0; |
dc59250c | 1068 | |
29418aa4 MG |
1069 | /* swapfiles are not supposed to be shared. */ |
1070 | if (IS_SWAPFILE(inode)) | |
1071 | goto out; | |
1072 | ||
b4b1eadf | 1073 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1074 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1075 | if (ret < 0) | |
1076 | goto out; | |
7d52e862 | 1077 | } |
d529ef83 JL |
1078 | |
1079 | /* | |
1080 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1081 | * invalidations that come in while we're shooting down the mappings | |
1082 | * are respected. But, that leaves a race window where one revalidator | |
1083 | * can clear the flag, and then another checks it before the mapping | |
1084 | * gets invalidated. Fix that by serializing access to this part of | |
1085 | * the function. | |
1086 | * | |
1087 | * At the same time, we need to allow other tasks to see whether we | |
1088 | * might be in the middle of invalidating the pages, so we only set | |
1089 | * the bit lock here if it looks like we're going to be doing that. | |
1090 | */ | |
1091 | for (;;) { | |
74316201 N |
1092 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1093 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1094 | if (ret) |
1095 | goto out; | |
17dfeb91 TM |
1096 | spin_lock(&inode->i_lock); |
1097 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1098 | spin_unlock(&inode->i_lock); | |
1099 | continue; | |
1100 | } | |
1101 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1102 | break; |
d529ef83 | 1103 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1104 | goto out; |
f4ce1299 TM |
1105 | } |
1106 | ||
17dfeb91 | 1107 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1108 | smp_wmb(); |
17dfeb91 TM |
1109 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1110 | spin_unlock(&inode->i_lock); | |
1111 | trace_nfs_invalidate_mapping_enter(inode); | |
1112 | ret = nfs_invalidate_mapping(inode, mapping); | |
1113 | trace_nfs_invalidate_mapping_exit(inode, ret); | |
1114 | ||
d529ef83 | 1115 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1116 | smp_mb__after_atomic(); |
d529ef83 | 1117 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1118 | out: |
44b11874 | 1119 | return ret; |
7d52e862 TM |
1120 | } |
1121 | ||
27dc1cd3 | 1122 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1123 | { |
1124 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1125 | unsigned long ret = 0; |
a895b4a1 | 1126 | |
9e6e70f8 TM |
1127 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1128 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1129 | && inode->i_version == fattr->pre_change_attr) { |
1130 | inode->i_version = fattr->change_attr; | |
70ca8852 | 1131 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1132 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1133 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1134 | } |
a895b4a1 | 1135 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1136 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1137 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1138 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1139 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1140 | ret |= NFS_INO_INVALID_ATTR; | |
1141 | } | |
9e6e70f8 TM |
1142 | |
1143 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1144 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1145 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1146 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1147 | if (S_ISDIR(inode->i_mode)) | |
6edf9609 | 1148 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1149 | ret |= NFS_INO_INVALID_ATTR; |
a895b4a1 | 1150 | } |
9e6e70f8 TM |
1151 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1152 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1153 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
cb1410c7 | 1154 | && nfsi->nrequests == 0) { |
27dc1cd3 TM |
1155 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
1156 | ret |= NFS_INO_INVALID_ATTR; | |
1157 | } | |
de242c0b | 1158 | |
27dc1cd3 | 1159 | return ret; |
a895b4a1 TM |
1160 | } |
1161 | ||
1da177e4 | 1162 | /** |
33801147 | 1163 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1164 | * @inode - pointer to inode |
1165 | * @fattr - updated attributes | |
1166 | * | |
1167 | * Verifies the attribute cache. If we have just changed the attributes, | |
1168 | * so that fattr carries weak cache consistency data, then it may | |
1169 | * also update the ctime/mtime/change_attribute. | |
1170 | */ | |
33801147 | 1171 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1172 | { |
1173 | struct nfs_inode *nfsi = NFS_I(inode); | |
1174 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1175 | unsigned long invalid = 0; |
1da177e4 | 1176 | |
dc59250c | 1177 | |
01da47bd TM |
1178 | if (nfs_have_delegated_attributes(inode)) |
1179 | return 0; | |
ca62b9c3 | 1180 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1181 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1182 | return -EIO; | |
1183 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1184 | return -EIO; |
ca62b9c3 | 1185 | |
9e6e70f8 | 1186 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 1187 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 1188 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1189 | |
1da177e4 | 1190 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1191 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1192 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1193 | |
9e6e70f8 TM |
1194 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1195 | cur_size = i_size_read(inode); | |
1196 | new_isize = nfs_size_to_loff_t(fattr->size); | |
cb1410c7 | 1197 | if (cur_size != new_isize && nfsi->nrequests == 0) |
9e6e70f8 TM |
1198 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1199 | } | |
1da177e4 LT |
1200 | |
1201 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1202 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1203 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1204 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1205 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1206 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1207 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1208 | |
1209 | /* Has the link count changed? */ | |
9e6e70f8 | 1210 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1211 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1212 | |
9e6e70f8 | 1213 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1214 | invalid |= NFS_INO_INVALID_ATIME; |
1215 | ||
1216 | if (invalid != 0) | |
6edf9609 | 1217 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1218 | |
33801147 | 1219 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1220 | return 0; |
1221 | } | |
1222 | ||
a10ad176 | 1223 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1224 | { |
9e6e70f8 TM |
1225 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1226 | return 0; | |
a10ad176 TM |
1227 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1228 | } | |
1229 | ||
1230 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1231 | { | |
9e6e70f8 TM |
1232 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1233 | return 0; | |
a10ad176 TM |
1234 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1235 | } | |
870a5be8 | 1236 | |
ae05f269 | 1237 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1238 | |
1239 | static unsigned long nfs_read_attr_generation_counter(void) | |
1240 | { | |
ae05f269 | 1241 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1242 | } |
1243 | ||
1244 | unsigned long nfs_inc_attr_generation_counter(void) | |
1245 | { | |
ae05f269 | 1246 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1247 | } |
1248 | ||
1249 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1250 | { | |
1251 | fattr->valid = 0; | |
1252 | fattr->time_start = jiffies; | |
1253 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1254 | fattr->owner_name = NULL; |
1255 | fattr->group_name = NULL; | |
4704f0e2 | 1256 | } |
ddda8e0a | 1257 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1258 | |
2d36bfde TM |
1259 | struct nfs_fattr *nfs_alloc_fattr(void) |
1260 | { | |
1261 | struct nfs_fattr *fattr; | |
1262 | ||
1263 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1264 | if (fattr != NULL) | |
1265 | nfs_fattr_init(fattr); | |
1266 | return fattr; | |
1267 | } | |
ddda8e0a | 1268 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1269 | |
1270 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1271 | { | |
1272 | struct nfs_fh *fh; | |
1273 | ||
1274 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1275 | if (fh != NULL) | |
1276 | fh->size = 0; | |
1277 | return fh; | |
1278 | } | |
ddda8e0a | 1279 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1280 | |
e27d359e | 1281 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1282 | /* |
1283 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1284 | * in the same way that wireshark does | |
1285 | * | |
1286 | * @fh: file handle | |
1287 | * | |
1288 | * For debugging only. | |
1289 | */ | |
1290 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1291 | { | |
1292 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1293 | * not on the result */ | |
1264a2f0 | 1294 | return nfs_fhandle_hash(fh); |
d8e0539e | 1295 | } |
9e6ee76d | 1296 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1297 | |
1298 | /* | |
20d27e92 CL |
1299 | * _nfs_display_fhandle - display an NFS file handle on the console |
1300 | * | |
1301 | * @fh: file handle to display | |
1302 | * @caption: display caption | |
1303 | * | |
1304 | * For debugging only. | |
1305 | */ | |
20d27e92 CL |
1306 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1307 | { | |
1308 | unsigned short i; | |
1309 | ||
fa68a1ba | 1310 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1311 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1312 | return; | |
1313 | } | |
1314 | ||
d8e0539e WAA |
1315 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1316 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1317 | for (i = 0; i < fh->size; i += 16) { |
1318 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1319 | ||
1320 | switch ((fh->size - i - 1) >> 2) { | |
1321 | case 0: | |
1322 | printk(KERN_DEFAULT " %08x\n", | |
1323 | be32_to_cpup(pos)); | |
1324 | break; | |
1325 | case 1: | |
1326 | printk(KERN_DEFAULT " %08x %08x\n", | |
1327 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1328 | break; | |
1329 | case 2: | |
1330 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1331 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1332 | be32_to_cpup(pos + 2)); | |
1333 | break; | |
1334 | default: | |
1335 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1336 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1337 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1338 | } | |
1339 | } | |
1340 | } | |
9e6ee76d | 1341 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1342 | #endif |
1343 | ||
a10ad176 TM |
1344 | /** |
1345 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1346 | * @inode - pointer to inode | |
1347 | * @fattr - attributes | |
1348 | * | |
1349 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1350 | * attributes got scheduled after another call carrying updated ones. | |
1351 | * | |
1352 | * To do so, the function first assumes that a more recent ctime means | |
1353 | * that the attributes in fattr are newer, however it also attempt to | |
1354 | * catch the case where ctime either didn't change, or went backwards | |
1355 | * (if someone reset the clock on the server) by looking at whether | |
1356 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1357 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1358 | * |
1359 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1360 | * more recent than the ones cached in the inode. | |
1361 | * | |
1362 | */ | |
1363 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1364 | { | |
1365 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1366 | ||
4704f0e2 | 1367 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1368 | nfs_ctime_need_update(inode, fattr) || |
1369 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1370 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1371 | } |
1372 | ||
d8c951c3 TM |
1373 | /* |
1374 | * Don't trust the change_attribute, mtime, ctime or size if | |
1375 | * a pnfs LAYOUTCOMMIT is outstanding | |
1376 | */ | |
1377 | static void nfs_inode_attrs_handle_layoutcommit(struct inode *inode, | |
1378 | struct nfs_fattr *fattr) | |
1379 | { | |
1380 | if (pnfs_layoutcommit_outstanding(inode)) | |
1381 | fattr->valid &= ~(NFS_ATTR_FATTR_CHANGE | | |
1382 | NFS_ATTR_FATTR_MTIME | | |
1383 | NFS_ATTR_FATTR_CTIME | | |
1384 | NFS_ATTR_FATTR_SIZE); | |
1385 | } | |
1386 | ||
a10ad176 TM |
1387 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1388 | { | |
f4ce1299 TM |
1389 | int ret; |
1390 | ||
1391 | trace_nfs_refresh_inode_enter(inode); | |
1392 | ||
d8c951c3 TM |
1393 | nfs_inode_attrs_handle_layoutcommit(inode, fattr); |
1394 | ||
a10ad176 | 1395 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1396 | ret = nfs_update_inode(inode, fattr); |
1397 | else | |
1398 | ret = nfs_check_inode_attributes(inode, fattr); | |
1399 | ||
1400 | trace_nfs_refresh_inode_exit(inode, ret); | |
1401 | return ret; | |
870a5be8 TM |
1402 | } |
1403 | ||
33801147 TM |
1404 | /** |
1405 | * nfs_refresh_inode - try to update the inode attribute cache | |
1406 | * @inode - pointer to inode | |
1407 | * @fattr - updated attributes | |
1408 | * | |
1409 | * Check that an RPC call that returned attributes has not overlapped with | |
1410 | * other recent updates of the inode metadata, then decide whether it is | |
1411 | * safe to do a full update of the inode attributes, or whether just to | |
1412 | * call nfs_check_inode_attributes. | |
1413 | */ | |
1414 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1415 | { | |
33801147 TM |
1416 | int status; |
1417 | ||
1418 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1419 | return 0; | |
1420 | spin_lock(&inode->i_lock); | |
870a5be8 | 1421 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1422 | spin_unlock(&inode->i_lock); |
ef79c097 | 1423 | |
33801147 TM |
1424 | return status; |
1425 | } | |
ddda8e0a | 1426 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1427 | |
d65f557f TM |
1428 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1429 | { | |
6edf9609 | 1430 | unsigned long invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
d65f557f | 1431 | |
6edf9609 TM |
1432 | if (S_ISDIR(inode->i_mode)) |
1433 | invalid |= NFS_INO_INVALID_DATA; | |
1434 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1435 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1436 | return 0; | |
1437 | return nfs_refresh_inode_locked(inode, fattr); | |
1438 | } | |
1439 | ||
decf491f TM |
1440 | /** |
1441 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1442 | * @inode - pointer to inode | |
1443 | * @fattr - updated attributes | |
1444 | * | |
1445 | * After an operation that has changed the inode metadata, mark the | |
1446 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1447 | * |
1448 | * NB: if the server didn't return any post op attributes, this | |
1449 | * function will force the retrieval of attributes before the next | |
1450 | * NFS request. Thus it should be used only for operations that | |
1451 | * are expected to change one or more attributes, to avoid | |
1452 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1453 | */ |
1454 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1455 | { | |
d65f557f | 1456 | int status; |
decf491f | 1457 | |
7668fdbe | 1458 | spin_lock(&inode->i_lock); |
d65f557f | 1459 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1460 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1461 | |
870a5be8 | 1462 | return status; |
decf491f | 1463 | } |
1c606fb7 | 1464 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1465 | |
70ca8852 TM |
1466 | /** |
1467 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1468 | * @inode - pointer to inode | |
1469 | * @fattr - updated attributes | |
1470 | * | |
1471 | * After an operation that has changed the inode metadata, mark the | |
1472 | * attribute cache as being invalid, then try to update it. Fake up | |
1473 | * weak cache consistency data, if none exist. | |
1474 | * | |
1475 | * This function is mainly designed to be used by the ->write_done() functions. | |
1476 | */ | |
1477 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1478 | { | |
d65f557f TM |
1479 | int status; |
1480 | ||
1481 | spin_lock(&inode->i_lock); | |
1482 | /* Don't do a WCC update if these attributes are already stale */ | |
1483 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1484 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1485 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1486 | | NFS_ATTR_FATTR_PRESIZE | |
1487 | | NFS_ATTR_FATTR_PREMTIME | |
1488 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1489 | goto out_noforce; |
1490 | } | |
9e6e70f8 TM |
1491 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1492 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1493 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1494 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1495 | } |
9e6e70f8 TM |
1496 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1497 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1498 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1499 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1500 | } | |
1501 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1502 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1503 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1504 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1505 | } | |
1506 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1507 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1508 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1509 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1510 | } |
d65f557f TM |
1511 | out_noforce: |
1512 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1513 | spin_unlock(&inode->i_lock); | |
1514 | return status; | |
70ca8852 | 1515 | } |
ddda8e0a | 1516 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1517 | |
1da177e4 LT |
1518 | /* |
1519 | * Many nfs protocol calls return the new file attributes after | |
1520 | * an operation. Here we update the inode to reflect the state | |
1521 | * of the server's inode. | |
1522 | * | |
1523 | * This is a bit tricky because we have to make sure all dirty pages | |
1524 | * have been sent off to the server before calling invalidate_inode_pages. | |
1525 | * To make sure no other process adds more write requests while we try | |
1526 | * our best to flush them, we make them sleep during the attribute refresh. | |
1527 | * | |
1528 | * A very similar scenario holds for the dir cache. | |
1529 | */ | |
24aa1fe6 | 1530 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1531 | { |
8b4bdcf8 | 1532 | struct nfs_server *server; |
1da177e4 | 1533 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1534 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1535 | unsigned long invalid = 0; |
3e7d950a | 1536 | unsigned long now = jiffies; |
62ab460c | 1537 | unsigned long save_cache_validity; |
1da177e4 | 1538 | |
1e8968c5 | 1539 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1540 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1541 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1542 | atomic_read(&inode->i_count), fattr->valid); |
1543 | ||
e73e6c9e MT |
1544 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1545 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1546 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1547 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1548 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1549 | (long long)fattr->fileid); | |
1550 | goto out_err; | |
1551 | } | |
1da177e4 LT |
1552 | |
1553 | /* | |
1554 | * Make sure the inode's type hasn't changed. | |
1555 | */ | |
e73e6c9e MT |
1556 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1557 | /* | |
1558 | * Big trouble! The inode has become a different object. | |
1559 | */ | |
1e8968c5 | 1560 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1561 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1562 | goto out_err; | |
1563 | } | |
1da177e4 | 1564 | |
8b4bdcf8 | 1565 | server = NFS_SERVER(inode); |
a0356862 | 1566 | /* Update the fsid? */ |
9e6e70f8 | 1567 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1568 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1569 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1570 | server->fsid = fattr->fsid; |
1571 | ||
1da177e4 LT |
1572 | /* |
1573 | * Update the read time so we don't revalidate too often. | |
1574 | */ | |
33801147 | 1575 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1576 | |
62ab460c TM |
1577 | save_cache_validity = nfsi->cache_validity; |
1578 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1579 | | NFS_INO_INVALID_ATIME | |
1580 | | NFS_INO_REVAL_FORCED | |
1581 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1582 | |
a895b4a1 | 1583 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1584 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1585 | |
47aabaa7 | 1586 | /* More cache consistency checks */ |
9e6e70f8 | 1587 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1588 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1589 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1590 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1591 | invalid |= NFS_INO_INVALID_ATTR |
1592 | | NFS_INO_INVALID_DATA | |
1593 | | NFS_INO_INVALID_ACCESS | |
1594 | | NFS_INO_INVALID_ACL | |
1595 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1596 | if (S_ISDIR(inode->i_mode)) |
1597 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1598 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1599 | } |
62ab460c | 1600 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
43b6535e | 1601 | nfsi->cache_validity |= save_cache_validity; |
9e6e70f8 TM |
1602 | |
1603 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1604 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c | 1605 | } else if (server->caps & NFS_CAP_MTIME) |
43b6535e TM |
1606 | nfsi->cache_validity |= save_cache_validity & |
1607 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1608 | | NFS_INO_REVAL_FORCED); |
1609 | ||
9e6e70f8 | 1610 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1611 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c | 1612 | } else if (server->caps & NFS_CAP_CTIME) |
43b6535e TM |
1613 | nfsi->cache_validity |= save_cache_validity & |
1614 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1615 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1616 | |
951a143b | 1617 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1618 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1619 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1620 | cur_isize = i_size_read(inode); | |
1621 | if (new_isize != cur_isize) { | |
1622 | /* Do we perhaps have any outstanding writes, or has | |
1623 | * the file grown beyond our last write? */ | |
cb1410c7 | 1624 | if ((nfsi->nrequests == 0) || new_isize > cur_isize) { |
9e6e70f8 TM |
1625 | i_size_write(inode, new_isize); |
1626 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
f2467b6f | 1627 | invalid &= ~NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 1628 | } |
60c16ea8 HJ |
1629 | dprintk("NFS: isize change on server for file %s/%ld " |
1630 | "(%Ld to %Ld)\n", | |
1631 | inode->i_sb->s_id, | |
1632 | inode->i_ino, | |
1633 | (long long)cur_isize, | |
1634 | (long long)new_isize); | |
1da177e4 | 1635 | } |
62ab460c | 1636 | } else |
43b6535e TM |
1637 | nfsi->cache_validity |= save_cache_validity & |
1638 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1639 | | NFS_INO_REVAL_PAGECACHE |
1640 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1641 | |
1da177e4 | 1642 | |
9e6e70f8 TM |
1643 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1644 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c | 1645 | else if (server->caps & NFS_CAP_ATIME) |
43b6535e TM |
1646 | nfsi->cache_validity |= save_cache_validity & |
1647 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1648 | | NFS_INO_REVAL_FORCED); |
1da177e4 | 1649 | |
9e6e70f8 TM |
1650 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1651 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1652 | umode_t newmode = inode->i_mode & S_IFMT; |
1653 | newmode |= fattr->mode & S_IALLUGO; | |
1654 | inode->i_mode = newmode; | |
9e6e70f8 | 1655 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1656 | } |
62ab460c | 1657 | } else if (server->caps & NFS_CAP_MODE) |
43b6535e TM |
1658 | nfsi->cache_validity |= save_cache_validity & |
1659 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1660 | | NFS_INO_INVALID_ACCESS |
1661 | | NFS_INO_INVALID_ACL | |
1662 | | NFS_INO_REVAL_FORCED); | |
1663 | ||
9e6e70f8 | 1664 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1665 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1666 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1667 | inode->i_uid = fattr->uid; | |
1668 | } | |
62ab460c | 1669 | } else if (server->caps & NFS_CAP_OWNER) |
43b6535e TM |
1670 | nfsi->cache_validity |= save_cache_validity & |
1671 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1672 | | NFS_INO_INVALID_ACCESS |
1673 | | NFS_INO_INVALID_ACL | |
1674 | | NFS_INO_REVAL_FORCED); | |
1675 | ||
9e6e70f8 | 1676 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1677 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1678 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1679 | inode->i_gid = fattr->gid; | |
1680 | } | |
62ab460c | 1681 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
43b6535e TM |
1682 | nfsi->cache_validity |= save_cache_validity & |
1683 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1684 | | NFS_INO_INVALID_ACCESS |
1685 | | NFS_INO_INVALID_ACL | |
1686 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1687 | |
9e6e70f8 TM |
1688 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1689 | if (inode->i_nlink != fattr->nlink) { | |
1690 | invalid |= NFS_INO_INVALID_ATTR; | |
1691 | if (S_ISDIR(inode->i_mode)) | |
1692 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1693 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1694 | } |
62ab460c | 1695 | } else if (server->caps & NFS_CAP_NLINK) |
43b6535e TM |
1696 | nfsi->cache_validity |= save_cache_validity & |
1697 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1698 | | NFS_INO_REVAL_FORCED); |
1da177e4 | 1699 | |
9e6e70f8 | 1700 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1701 | /* |
1702 | * report the blocks in 512byte units | |
1703 | */ | |
1704 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1705 | } |
9e6e70f8 TM |
1706 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1707 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1708 | |
1709 | /* Update attrtimeo value if we're out of the unstable period */ | |
fd1defc2 | 1710 | if (invalid & NFS_INO_INVALID_ATTR) { |
91d5b470 | 1711 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1712 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1713 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1714 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1715 | } else { |
64672d55 | 1716 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1717 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1718 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1719 | nfsi->attrtimeo_timestamp = now; | |
1720 | } | |
1da177e4 | 1721 | } |
f2115dc9 | 1722 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1723 | /* Don't invalidate the data if we were to blame */ |
1724 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1725 | || S_ISLNK(inode->i_mode))) | |
1726 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1727 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1728 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
6edf9609 | 1729 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 1730 | |
1da177e4 | 1731 | return 0; |
b37b03b7 | 1732 | out_err: |
1da177e4 LT |
1733 | /* |
1734 | * No need to worry about unhashing the dentry, as the | |
1735 | * lookup validation will know that the inode is bad. | |
1736 | * (But we fall through to invalidate the caches.) | |
1737 | */ | |
1738 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1739 | return -ESTALE; |
1740 | } | |
1741 | ||
f7b422b1 | 1742 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1743 | { |
1744 | struct nfs_inode *nfsi; | |
e94b1766 | 1745 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1746 | if (!nfsi) |
1747 | return NULL; | |
55296809 CL |
1748 | nfsi->flags = 0UL; |
1749 | nfsi->cache_validity = 0UL; | |
89d77c8f | 1750 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1751 | nfsi->nfs4_acl = NULL; |
1752 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1753 | return &nfsi->vfs_inode; |
1754 | } | |
89d77c8f | 1755 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1756 | |
fa0d7e3d | 1757 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1758 | { |
fa0d7e3d | 1759 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1760 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1761 | } | |
1762 | ||
fa0d7e3d NP |
1763 | void nfs_destroy_inode(struct inode *inode) |
1764 | { | |
1765 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1766 | } | |
89d77c8f | 1767 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1768 | |
d75d5414 AM |
1769 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1770 | { | |
89d77c8f | 1771 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1772 | INIT_LIST_HEAD(&nfsi->open_states); |
1773 | nfsi->delegation = NULL; | |
1774 | nfsi->delegation_state = 0; | |
1775 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1776 | nfsi->layout = NULL; |
d75d5414 AM |
1777 | #endif |
1778 | } | |
f7b422b1 | 1779 | |
51cc5068 | 1780 | static void init_once(void *foo) |
1da177e4 LT |
1781 | { |
1782 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1783 | ||
a35afb83 | 1784 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1785 | INIT_LIST_HEAD(&nfsi->open_files); |
1786 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1787 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1788 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
cb1410c7 | 1789 | nfsi->nrequests = 0; |
ea2cf228 | 1790 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1791 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1792 | atomic_set(&nfsi->silly_count, 1); |
1793 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1794 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1795 | nfs4_init_once(nfsi); |
1da177e4 | 1796 | } |
20c2df83 | 1797 | |
f7b422b1 | 1798 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1799 | { |
1800 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1801 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1802 | 0, (SLAB_RECLAIM_ACCOUNT| |
1803 | SLAB_MEM_SPREAD), | |
20c2df83 | 1804 | init_once); |
1da177e4 LT |
1805 | if (nfs_inode_cachep == NULL) |
1806 | return -ENOMEM; | |
1807 | ||
1808 | return 0; | |
1809 | } | |
1810 | ||
266bee88 | 1811 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1812 | { |
8c0a8537 KS |
1813 | /* |
1814 | * Make sure all delayed rcu free inodes are flushed before we | |
1815 | * destroy cache. | |
1816 | */ | |
1817 | rcu_barrier(); | |
1a1d92c1 | 1818 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1819 | } |
1820 | ||
5746006f | 1821 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1822 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1823 | |
1824 | /* | |
1825 | * start up the nfsiod workqueue | |
1826 | */ | |
1827 | static int nfsiod_start(void) | |
1828 | { | |
1829 | struct workqueue_struct *wq; | |
1830 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1831 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1832 | if (wq == NULL) |
1833 | return -ENOMEM; | |
1834 | nfsiod_workqueue = wq; | |
1835 | return 0; | |
1836 | } | |
1837 | ||
1838 | /* | |
1839 | * Destroy the nfsiod workqueue | |
1840 | */ | |
1841 | static void nfsiod_stop(void) | |
1842 | { | |
1843 | struct workqueue_struct *wq; | |
1844 | ||
1845 | wq = nfsiod_workqueue; | |
1846 | if (wq == NULL) | |
1847 | return; | |
1848 | nfsiod_workqueue = NULL; | |
1849 | destroy_workqueue(wq); | |
1850 | } | |
1851 | ||
1b340d01 | 1852 | int nfs_net_id; |
9e2e74db | 1853 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1854 | |
1855 | static int nfs_net_init(struct net *net) | |
1856 | { | |
6b13168b | 1857 | nfs_clients_init(net); |
65b38851 | 1858 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
1859 | } |
1860 | ||
1861 | static void nfs_net_exit(struct net *net) | |
1862 | { | |
65b38851 | 1863 | nfs_fs_proc_net_exit(net); |
28cd1b3f | 1864 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1865 | } |
1866 | ||
1867 | static struct pernet_operations nfs_net_ops = { | |
1868 | .init = nfs_net_init, | |
1869 | .exit = nfs_net_exit, | |
1870 | .id = &nfs_net_id, | |
1871 | .size = sizeof(struct nfs_net), | |
1872 | }; | |
1873 | ||
1da177e4 LT |
1874 | /* |
1875 | * Initialize NFS | |
1876 | */ | |
1877 | static int __init init_nfs_fs(void) | |
1878 | { | |
1879 | int err; | |
1880 | ||
1b340d01 | 1881 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1882 | if (err < 0) |
89d77c8f | 1883 | goto out9; |
e571cbf1 | 1884 | |
8ec442ae DH |
1885 | err = nfs_fscache_register(); |
1886 | if (err < 0) | |
89d77c8f | 1887 | goto out8; |
8ec442ae | 1888 | |
5746006f TM |
1889 | err = nfsiod_start(); |
1890 | if (err) | |
89d77c8f | 1891 | goto out7; |
5746006f | 1892 | |
6aaca566 DH |
1893 | err = nfs_fs_proc_init(); |
1894 | if (err) | |
89d77c8f | 1895 | goto out6; |
6aaca566 | 1896 | |
1da177e4 LT |
1897 | err = nfs_init_nfspagecache(); |
1898 | if (err) | |
89d77c8f | 1899 | goto out5; |
1da177e4 LT |
1900 | |
1901 | err = nfs_init_inodecache(); | |
1902 | if (err) | |
89d77c8f | 1903 | goto out4; |
1da177e4 LT |
1904 | |
1905 | err = nfs_init_readpagecache(); | |
1906 | if (err) | |
89d77c8f | 1907 | goto out3; |
1da177e4 LT |
1908 | |
1909 | err = nfs_init_writepagecache(); | |
1910 | if (err) | |
89d77c8f | 1911 | goto out2; |
1da177e4 | 1912 | |
1da177e4 LT |
1913 | err = nfs_init_directcache(); |
1914 | if (err) | |
89d77c8f | 1915 | goto out1; |
1da177e4 LT |
1916 | |
1917 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1918 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1919 | #endif |
f7b422b1 | 1920 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1921 | goto out0; |
1922 | ||
1da177e4 | 1923 | return 0; |
129d1977 | 1924 | out0: |
1da177e4 | 1925 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1926 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1927 | #endif |
1da177e4 | 1928 | nfs_destroy_directcache(); |
89d77c8f | 1929 | out1: |
129d1977 | 1930 | nfs_destroy_writepagecache(); |
89d77c8f | 1931 | out2: |
129d1977 | 1932 | nfs_destroy_readpagecache(); |
89d77c8f | 1933 | out3: |
129d1977 | 1934 | nfs_destroy_inodecache(); |
89d77c8f | 1935 | out4: |
129d1977 | 1936 | nfs_destroy_nfspagecache(); |
89d77c8f | 1937 | out5: |
129d1977 | 1938 | nfs_fs_proc_exit(); |
89d77c8f | 1939 | out6: |
129d1977 | 1940 | nfsiod_stop(); |
89d77c8f | 1941 | out7: |
129d1977 | 1942 | nfs_fscache_unregister(); |
89d77c8f | 1943 | out8: |
129d1977 | 1944 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 1945 | out9: |
1da177e4 LT |
1946 | return err; |
1947 | } | |
1948 | ||
1949 | static void __exit exit_nfs_fs(void) | |
1950 | { | |
1da177e4 | 1951 | nfs_destroy_directcache(); |
1da177e4 LT |
1952 | nfs_destroy_writepagecache(); |
1953 | nfs_destroy_readpagecache(); | |
1954 | nfs_destroy_inodecache(); | |
1955 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1956 | nfs_fscache_unregister(); |
1b340d01 | 1957 | unregister_pernet_subsys(&nfs_net_ops); |
1da177e4 | 1958 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1959 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1960 | #endif |
f7b422b1 | 1961 | unregister_nfs_fs(); |
6aaca566 | 1962 | nfs_fs_proc_exit(); |
5746006f | 1963 | nfsiod_stop(); |
1da177e4 LT |
1964 | } |
1965 | ||
1966 | /* Not quite true; I just maintain it */ | |
1967 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1968 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1969 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1970 | |
1971 | module_init(init_nfs_fs) | |
1972 | module_exit(exit_nfs_fs) |