Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/init.h> | |
e8edc6e0 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
1da177e4 | 35 | #include <linux/vfs.h> |
9cdb3883 MN |
36 | #include <linux/inet.h> |
37 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
3fa0b4e2 | 39 | #include <linux/compat.h> |
d310310c | 40 | #include <linux/freezer.h> |
1da177e4 | 41 | |
1da177e4 LT |
42 | #include <asm/uaccess.h> |
43 | ||
4ce79717 | 44 | #include "nfs4_fs.h" |
a72b4422 | 45 | #include "callback.h" |
1da177e4 | 46 | #include "delegation.h" |
d9ef5a8c | 47 | #include "iostat.h" |
f7b422b1 | 48 | #include "internal.h" |
8ec442ae | 49 | #include "fscache.h" |
e5e94017 | 50 | #include "pnfs.h" |
ab7017a3 | 51 | #include "nfs.h" |
1b340d01 | 52 | #include "netns.h" |
1da177e4 | 53 | |
f4ce1299 TM |
54 | #include "nfstrace.h" |
55 | ||
1da177e4 | 56 | #define NFSDBG_FACILITY NFSDBG_VFS |
1da177e4 | 57 | |
f43bf0be TM |
58 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
59 | ||
60 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 61 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 62 | |
1da177e4 | 63 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 64 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 65 | |
e18b890b | 66 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 67 | |
1da177e4 LT |
68 | static inline unsigned long |
69 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
70 | { | |
71 | return nfs_fileid_to_ino_t(fattr->fileid); | |
72 | } | |
73 | ||
72cb77f4 TM |
74 | /** |
75 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
76 | * @word: long word containing the bit lock | |
77 | */ | |
78 | int nfs_wait_bit_killable(void *word) | |
79 | { | |
80 | if (fatal_signal_pending(current)) | |
81 | return -ERESTARTSYS; | |
416ad3c9 | 82 | freezable_schedule_unsafe(); |
72cb77f4 TM |
83 | return 0; |
84 | } | |
89d77c8f | 85 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 86 | |
f43bf0be TM |
87 | /** |
88 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
89 | * @fileid: 64-bit fileid | |
90 | * | |
91 | * This function returns a 32-bit inode number if the boot parameter | |
92 | * nfs.enable_ino64 is zero. | |
93 | */ | |
94 | u64 nfs_compat_user_ino64(u64 fileid) | |
95 | { | |
3fa0b4e2 FF |
96 | #ifdef CONFIG_COMPAT |
97 | compat_ulong_t ino; | |
98 | #else | |
99 | unsigned long ino; | |
100 | #endif | |
f43bf0be TM |
101 | |
102 | if (enable_ino64) | |
103 | return fileid; | |
104 | ino = fileid; | |
105 | if (sizeof(ino) < sizeof(fileid)) | |
106 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
107 | return ino; | |
108 | } | |
109 | ||
eed99357 TM |
110 | int nfs_drop_inode(struct inode *inode) |
111 | { | |
112 | return NFS_STALE(inode) || generic_drop_inode(inode); | |
113 | } | |
114 | EXPORT_SYMBOL_GPL(nfs_drop_inode); | |
115 | ||
19d87ca3 | 116 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 117 | { |
da6d503a TM |
118 | /* |
119 | * The following should never happen... | |
120 | */ | |
f48407dd TM |
121 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
122 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); | |
ada70d94 | 123 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 124 | nfs_access_zap_cache(inode); |
f1fe29b4 | 125 | nfs_fscache_clear_inode(inode); |
1da177e4 | 126 | } |
89d77c8f | 127 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 128 | |
b57922d9 AV |
129 | void nfs_evict_inode(struct inode *inode) |
130 | { | |
131 | truncate_inode_pages(&inode->i_data, 0); | |
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 | ||
1da177e4 LT |
150 | /* |
151 | * Invalidate the local caches | |
152 | */ | |
b37b03b7 | 153 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
154 | { |
155 | struct nfs_inode *nfsi = NFS_I(inode); | |
156 | int mode = inode->i_mode; | |
157 | ||
91d5b470 CL |
158 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
159 | ||
c7c20973 TM |
160 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
161 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 162 | |
c3f52af3 | 163 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
de242c0b | 164 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
de242c0b | 165 | nfs_fscache_invalidate(inode); |
aa9c2669 DQ |
166 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
167 | | NFS_INO_INVALID_LABEL | |
168 | | NFS_INO_INVALID_DATA | |
169 | | NFS_INO_INVALID_ACCESS | |
170 | | NFS_INO_INVALID_ACL | |
171 | | NFS_INO_REVAL_PAGECACHE; | |
172 | } else | |
173 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
174 | | NFS_INO_INVALID_LABEL | |
175 | | NFS_INO_INVALID_ACCESS | |
176 | | NFS_INO_INVALID_ACL | |
177 | | NFS_INO_REVAL_PAGECACHE; | |
b37b03b7 | 178 | } |
dc59250c | 179 | |
b37b03b7 TM |
180 | void nfs_zap_caches(struct inode *inode) |
181 | { | |
182 | spin_lock(&inode->i_lock); | |
183 | nfs_zap_caches_locked(inode); | |
dc59250c | 184 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
185 | } |
186 | ||
cd9ae2b6 TM |
187 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
188 | { | |
189 | if (mapping->nrpages != 0) { | |
190 | spin_lock(&inode->i_lock); | |
191 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
de242c0b | 192 | nfs_fscache_invalidate(inode); |
cd9ae2b6 TM |
193 | spin_unlock(&inode->i_lock); |
194 | } | |
195 | } | |
196 | ||
f41f7418 | 197 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
198 | { |
199 | void (*clear_acl_cache)(struct inode *); | |
200 | ||
201 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
202 | if (clear_acl_cache != NULL) | |
203 | clear_acl_cache(inode); | |
dc59250c | 204 | spin_lock(&inode->i_lock); |
55296809 | 205 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 206 | spin_unlock(&inode->i_lock); |
1da177e4 | 207 | } |
1c606fb7 | 208 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 209 | |
c4812998 TM |
210 | void nfs_invalidate_atime(struct inode *inode) |
211 | { | |
212 | spin_lock(&inode->i_lock); | |
213 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
214 | spin_unlock(&inode->i_lock); | |
215 | } | |
ddda8e0a | 216 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 217 | |
1da177e4 | 218 | /* |
b37b03b7 TM |
219 | * Invalidate, but do not unhash, the inode. |
220 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 221 | */ |
b37b03b7 | 222 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 223 | { |
3a10c30a | 224 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 225 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
226 | } |
227 | ||
228 | struct nfs_find_desc { | |
229 | struct nfs_fh *fh; | |
230 | struct nfs_fattr *fattr; | |
231 | }; | |
232 | ||
233 | /* | |
234 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
235 | * this, and re-exported directories (also seen in NFSv2) | |
236 | * we are forced to allow 2 different inodes to have the same | |
237 | * i_ino. | |
238 | */ | |
239 | static int | |
240 | nfs_find_actor(struct inode *inode, void *opaque) | |
241 | { | |
242 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
243 | struct nfs_fh *fh = desc->fh; | |
244 | struct nfs_fattr *fattr = desc->fattr; | |
245 | ||
246 | if (NFS_FILEID(inode) != fattr->fileid) | |
247 | return 0; | |
f6488c9b JL |
248 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
249 | return 0; | |
1da177e4 LT |
250 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
251 | return 0; | |
252 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
253 | return 0; | |
254 | return 1; | |
255 | } | |
256 | ||
257 | static int | |
258 | nfs_init_locked(struct inode *inode, void *opaque) | |
259 | { | |
260 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
261 | struct nfs_fattr *fattr = desc->fattr; | |
262 | ||
99fadcd7 | 263 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
264 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
265 | return 0; | |
266 | } | |
267 | ||
e058f70b | 268 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
aa9c2669 DQ |
269 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
270 | struct nfs4_label *label) | |
271 | { | |
272 | int error; | |
273 | ||
274 | if (label == NULL) | |
275 | return; | |
276 | ||
aa9c2669 DQ |
277 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
278 | error = security_inode_notifysecctx(inode, label->label, | |
279 | label->len); | |
280 | if (error) | |
281 | printk(KERN_ERR "%s() %s %d " | |
282 | "security_inode_notifysecctx() %d\n", | |
283 | __func__, | |
284 | (char *)label->label, | |
285 | label->len, error); | |
286 | } | |
287 | } | |
288 | ||
e058f70b SD |
289 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
290 | { | |
291 | struct nfs4_label *label = NULL; | |
292 | int minor_version = server->nfs_client->cl_minorversion; | |
293 | ||
294 | if (minor_version < 2) | |
295 | return label; | |
296 | ||
297 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
298 | return label; | |
299 | ||
300 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
301 | if (label == NULL) | |
302 | return ERR_PTR(-ENOMEM); | |
303 | ||
304 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
305 | if (label->label == NULL) { | |
306 | kfree(label); | |
307 | return ERR_PTR(-ENOMEM); | |
308 | } | |
309 | label->len = NFS4_MAXLABELLEN; | |
310 | ||
311 | return label; | |
312 | } | |
313 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 314 | #else |
829e57d7 | 315 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
aa9c2669 DQ |
316 | struct nfs4_label *label) |
317 | { | |
318 | } | |
e058f70b | 319 | #endif |
aa9c2669 | 320 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 321 | |
1da177e4 LT |
322 | /* |
323 | * This is our front-end to iget that looks up inodes by file handle | |
324 | * instead of inode number. | |
325 | */ | |
326 | struct inode * | |
1775fd3e | 327 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
328 | { |
329 | struct nfs_find_desc desc = { | |
330 | .fh = fh, | |
331 | .fattr = fattr | |
332 | }; | |
03f28e3a | 333 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
334 | unsigned long hash; |
335 | ||
7ebb9315 BS |
336 | nfs_attr_check_mountpoint(sb, fattr); |
337 | ||
533eb461 AA |
338 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
339 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 340 | goto out_no_inode; |
9e6e70f8 | 341 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 342 | goto out_no_inode; |
1da177e4 LT |
343 | |
344 | hash = nfs_fattr_to_ino_t(fattr); | |
345 | ||
03f28e3a TM |
346 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
347 | if (inode == NULL) { | |
348 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 349 | goto out_no_inode; |
03f28e3a | 350 | } |
1da177e4 LT |
351 | |
352 | if (inode->i_state & I_NEW) { | |
353 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 354 | unsigned long now = jiffies; |
1da177e4 LT |
355 | |
356 | /* We set i_ino for the few things that still rely on it, | |
357 | * such as stat(2) */ | |
358 | inode->i_ino = hash; | |
359 | ||
360 | /* We can't support update_atime(), since the server will reset it */ | |
361 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
362 | inode->i_mode = fattr->mode; | |
62ab460c TM |
363 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
364 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
4124bbc5 | 365 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
366 | /* Why so? Because we want revalidate for devices/FIFOs, and |
367 | * that's precisely what we have in nfs_file_inode_operations. | |
368 | */ | |
8fa5c000 | 369 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 370 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 371 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
372 | inode->i_data.a_ops = &nfs_file_aops; |
373 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
374 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 375 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 376 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 377 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 378 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
379 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
380 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
381 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
382 | inode->i_op = &nfs_referral_inode_operations; | |
383 | else | |
384 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 385 | inode->i_fop = NULL; |
36d43a43 | 386 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 387 | } |
1da177e4 LT |
388 | } else if (S_ISLNK(inode->i_mode)) |
389 | inode->i_op = &nfs_symlink_inode_operations; | |
390 | else | |
391 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
392 | ||
9e6e70f8 TM |
393 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
394 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
395 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 396 | inode->i_version = 0; |
9e6e70f8 | 397 | inode->i_size = 0; |
6d6b77f1 | 398 | clear_nlink(inode); |
9ff593c4 EB |
399 | inode->i_uid = make_kuid(&init_user_ns, -2); |
400 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
401 | inode->i_blocks = 0; |
402 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
403 | nfsi->write_io = 0; |
404 | nfsi->read_io = 0; | |
9e6e70f8 | 405 | |
33801147 | 406 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 407 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
408 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
409 | inode->i_atime = fattr->atime; | |
62ab460c TM |
410 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
411 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
412 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
413 | inode->i_mtime = fattr->mtime; | |
62ab460c | 414 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
4124bbc5 | 415 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
416 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
417 | inode->i_ctime = fattr->ctime; | |
62ab460c | 418 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
4124bbc5 | 419 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 | 420 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 421 | inode->i_version = fattr->change_attr; |
62ab460c | 422 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
4124bbc5 | 423 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
424 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
425 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
426 | else |
427 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
62ab460c | 428 | | NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 429 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 430 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
431 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
432 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
433 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
434 | inode->i_uid = fattr->uid; | |
62ab460c | 435 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
4124bbc5 | 436 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
437 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
438 | inode->i_gid = fattr->gid; | |
62ab460c | 439 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
4124bbc5 | 440 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
441 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
442 | inode->i_blocks = fattr->du.nfs2.blocks; | |
443 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
444 | /* |
445 | * report the blocks in 512byte units | |
446 | */ | |
447 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 448 | } |
aa9c2669 DQ |
449 | |
450 | nfs_setsecurity(inode, fattr, label); | |
451 | ||
1da177e4 | 452 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 453 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 454 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 455 | |
f1fe29b4 | 456 | nfs_fscache_init_inode(inode); |
ef79c097 | 457 | |
1da177e4 LT |
458 | unlock_new_inode(inode); |
459 | } else | |
460 | nfs_refresh_inode(inode, fattr); | |
1e8968c5 | 461 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 462 | inode->i_sb->s_id, |
1e8968c5 | 463 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 464 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
465 | atomic_read(&inode->i_count)); |
466 | ||
467 | out: | |
468 | return inode; | |
469 | ||
470 | out_no_inode: | |
03f28e3a | 471 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
472 | goto out; |
473 | } | |
89d77c8f | 474 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 475 | |
536e43d1 | 476 | #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 |
477 | |
478 | int | |
479 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
480 | { | |
481 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
482 | struct nfs_fattr *fattr; |
483 | int error = -ENOMEM; | |
1da177e4 | 484 | |
91d5b470 CL |
485 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
486 | ||
188b95dd JL |
487 | /* skip mode change if it's just for clearing setuid/setgid */ |
488 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
489 | attr->ia_valid &= ~ATTR_MODE; | |
490 | ||
1da177e4 LT |
491 | if (attr->ia_valid & ATTR_SIZE) { |
492 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
493 | attr->ia_valid &= ~ATTR_SIZE; | |
494 | } | |
495 | ||
496 | /* Optimization: if the end result is no change, don't RPC */ | |
497 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 498 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
499 | return 0; |
500 | ||
f4ce1299 TM |
501 | trace_nfs_setattr_enter(inode); |
502 | ||
755c1e20 | 503 | /* Write all dirty data */ |
1d59d61f TM |
504 | if (S_ISREG(inode->i_mode)) { |
505 | nfs_inode_dio_wait(inode); | |
e1552e19 | 506 | nfs_wb_all(inode); |
1d59d61f | 507 | } |
987f8dfc TM |
508 | |
509 | fattr = nfs_alloc_fattr(); | |
510 | if (fattr == NULL) | |
511 | goto out; | |
642ac549 TM |
512 | /* |
513 | * Return any delegations if we're going to change ACLs | |
514 | */ | |
515 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 516 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 517 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 518 | if (error == 0) |
aa9c2669 | 519 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
520 | nfs_free_fattr(fattr); |
521 | out: | |
f4ce1299 | 522 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
523 | return error; |
524 | } | |
ddda8e0a | 525 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 526 | |
a3d01454 TM |
527 | /** |
528 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
529 | * @inode: inode of the file used | |
530 | * @offset: file offset to start truncating | |
531 | * | |
532 | * This is a copy of the common vmtruncate, but with the locking | |
533 | * corrected to take into account the fact that NFS requires | |
534 | * inode->i_size to be updated under the inode->i_lock. | |
535 | */ | |
536 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
537 | { | |
c08d3b0e | 538 | int err; |
a3d01454 | 539 | |
c08d3b0e | 540 | err = inode_newsize_ok(inode, offset); |
541 | if (err) | |
542 | goto out; | |
a3d01454 | 543 | |
c08d3b0e | 544 | spin_lock(&inode->i_lock); |
c08d3b0e | 545 | i_size_write(inode, offset); |
546 | spin_unlock(&inode->i_lock); | |
547 | ||
7caef267 | 548 | truncate_pagecache(inode, offset); |
c08d3b0e | 549 | out: |
550 | return err; | |
a3d01454 TM |
551 | } |
552 | ||
65e4308d TM |
553 | /** |
554 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
555 | * @inode: pointer to struct inode | |
556 | * @attr: pointer to struct iattr | |
557 | * | |
558 | * Note: we do this in the *proc.c in order to ensure that | |
559 | * it works for things like exclusive creates too. | |
560 | */ | |
561 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
562 | { | |
563 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 564 | spin_lock(&inode->i_lock); |
1da177e4 | 565 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
566 | int mode = attr->ia_mode & S_IALLUGO; |
567 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
568 | inode->i_mode = mode; |
569 | } | |
570 | if ((attr->ia_valid & ATTR_UID) != 0) | |
571 | inode->i_uid = attr->ia_uid; | |
572 | if ((attr->ia_valid & ATTR_GID) != 0) | |
573 | inode->i_gid = attr->ia_gid; | |
55296809 | 574 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 575 | spin_unlock(&inode->i_lock); |
65e4308d TM |
576 | } |
577 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 578 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 579 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 580 | } |
1da177e4 | 581 | } |
ddda8e0a | 582 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 583 | |
1da177e4 LT |
584 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
585 | { | |
586 | struct inode *inode = dentry->d_inode; | |
55296809 | 587 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
588 | int err; |
589 | ||
f4ce1299 | 590 | trace_nfs_getattr_enter(inode); |
acdc53b2 | 591 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 592 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 593 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
594 | err = filemap_write_and_wait(inode->i_mapping); |
595 | if (err) | |
596 | goto out; | |
28c494c5 | 597 | } |
fc33a7bb CH |
598 | |
599 | /* | |
600 | * We may force a getattr if the user cares about atime. | |
601 | * | |
602 | * Note that we only have to check the vfsmount flags here: | |
603 | * - NFS always sets S_NOATIME by so checking it would give a | |
604 | * bogus result | |
605 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
606 | * no point in checking those. | |
607 | */ | |
608 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
609 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 610 | need_atime = 0; |
fc33a7bb | 611 | |
1da177e4 LT |
612 | if (need_atime) |
613 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
614 | else | |
615 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 616 | if (!err) { |
1da177e4 | 617 | generic_fillattr(inode, stat); |
f43bf0be | 618 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 619 | } |
acdc53b2 | 620 | out: |
f4ce1299 | 621 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
622 | return err; |
623 | } | |
ddda8e0a | 624 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 625 | |
f11ac8db TM |
626 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
627 | { | |
628 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
629 | l_ctx->lockowner.l_owner = current->files; |
630 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 631 | INIT_LIST_HEAD(&l_ctx->list); |
577b4232 | 632 | nfs_iocounter_init(&l_ctx->io_count); |
f11ac8db TM |
633 | } |
634 | ||
635 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
636 | { | |
8c86899f TM |
637 | struct nfs_lock_context *head = &ctx->lock_context; |
638 | struct nfs_lock_context *pos = head; | |
f11ac8db | 639 | |
8c86899f | 640 | do { |
2a369153 | 641 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 642 | continue; |
2a369153 | 643 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
644 | continue; |
645 | atomic_inc(&pos->count); | |
646 | return pos; | |
8c86899f | 647 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
648 | return NULL; |
649 | } | |
650 | ||
651 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
652 | { | |
653 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 654 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
655 | |
656 | spin_lock(&inode->i_lock); | |
657 | res = __nfs_find_lock_context(ctx); | |
658 | if (res == NULL) { | |
659 | spin_unlock(&inode->i_lock); | |
660 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
661 | if (new == NULL) | |
b3c54de6 | 662 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
663 | nfs_init_lock_context(new); |
664 | spin_lock(&inode->i_lock); | |
665 | res = __nfs_find_lock_context(ctx); | |
666 | if (res == NULL) { | |
667 | list_add_tail(&new->list, &ctx->lock_context.list); | |
668 | new->open_context = ctx; | |
669 | res = new; | |
670 | new = NULL; | |
671 | } | |
672 | } | |
673 | spin_unlock(&inode->i_lock); | |
674 | kfree(new); | |
675 | return res; | |
676 | } | |
677 | ||
678 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
679 | { | |
680 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 681 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
682 | |
683 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
684 | return; | |
685 | list_del(&l_ctx->list); | |
686 | spin_unlock(&inode->i_lock); | |
687 | kfree(l_ctx); | |
688 | } | |
689 | ||
7fe5c398 TM |
690 | /** |
691 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
692 | * @ctx: pointer to context | |
693 | * @is_sync: is this a synchronous close | |
694 | * | |
695 | * always ensure that the attributes are up to date if we're mounted | |
696 | * with close-to-open semantics | |
697 | */ | |
698 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
699 | { | |
700 | struct inode *inode; | |
701 | struct nfs_server *server; | |
702 | ||
703 | if (!(ctx->mode & FMODE_WRITE)) | |
704 | return; | |
705 | if (!is_sync) | |
706 | return; | |
3d4ff43d | 707 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
708 | if (!list_empty(&NFS_I(inode)->open_files)) |
709 | return; | |
710 | server = NFS_SERVER(inode); | |
711 | if (server->flags & NFS_MOUNT_NOCTO) | |
712 | return; | |
713 | nfs_revalidate_inode(server, inode); | |
714 | } | |
ddda8e0a | 715 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 716 | |
5ede7b1c | 717 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
718 | { |
719 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
720 | struct rpc_cred *cred = rpc_lookup_cred(); |
721 | if (IS_ERR(cred)) | |
722 | return ERR_CAST(cred); | |
1da177e4 | 723 | |
f52720ca | 724 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
725 | if (!ctx) { |
726 | put_rpccred(cred); | |
727 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 728 | } |
5ede7b1c AV |
729 | nfs_sb_active(dentry->d_sb); |
730 | ctx->dentry = dget(dentry); | |
731 | ctx->cred = cred; | |
732 | ctx->state = NULL; | |
733 | ctx->mode = f_mode; | |
734 | ctx->flags = 0; | |
735 | ctx->error = 0; | |
736 | nfs_init_lock_context(&ctx->lock_context); | |
737 | ctx->lock_context.open_context = ctx; | |
738 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 739 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
740 | return ctx; |
741 | } | |
89d77c8f | 742 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
743 | |
744 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
745 | { | |
746 | if (ctx != NULL) | |
f11ac8db | 747 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
748 | return ctx; |
749 | } | |
89d77c8f | 750 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 751 | |
7fe5c398 | 752 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 753 | { |
3d4ff43d AV |
754 | struct inode *inode = ctx->dentry->d_inode; |
755 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 756 | |
5c78f58e | 757 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
758 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
759 | return; | |
760 | list_del(&ctx->list); | |
761 | spin_unlock(&inode->i_lock); | |
ef84303e | 762 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 763 | return; |
5c78f58e TM |
764 | if (inode != NULL) |
765 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
766 | if (ctx->cred != NULL) |
767 | put_rpccred(ctx->cred); | |
3d4ff43d | 768 | dput(ctx->dentry); |
322b2b90 | 769 | nfs_sb_deactive(sb); |
82be417a | 770 | kfree(ctx->mdsthreshold); |
3bec63db TM |
771 | kfree(ctx); |
772 | } | |
773 | ||
a49c3c77 TM |
774 | void put_nfs_open_context(struct nfs_open_context *ctx) |
775 | { | |
776 | __put_nfs_open_context(ctx, 0); | |
777 | } | |
89d77c8f | 778 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 779 | |
1da177e4 LT |
780 | /* |
781 | * Ensure that mmap has a recent RPC credential for use when writing out | |
782 | * shared pages | |
783 | */ | |
c45ffdd2 | 784 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 785 | { |
c45ffdd2 | 786 | struct inode *inode = ctx->dentry->d_inode; |
1da177e4 LT |
787 | struct nfs_inode *nfsi = NFS_I(inode); |
788 | ||
1da177e4 LT |
789 | spin_lock(&inode->i_lock); |
790 | list_add(&ctx->list, &nfsi->open_files); | |
791 | spin_unlock(&inode->i_lock); | |
792 | } | |
c45ffdd2 TM |
793 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
794 | ||
795 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
796 | { | |
797 | filp->private_data = get_nfs_open_context(ctx); | |
798 | if (list_empty(&ctx->list)) | |
799 | nfs_inode_attach_open_context(ctx); | |
800 | } | |
89d77c8f | 801 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 802 | |
d530838b TM |
803 | /* |
804 | * Given an inode, search for an open context with the desired characteristics | |
805 | */ | |
dc0b027d | 806 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
807 | { |
808 | struct nfs_inode *nfsi = NFS_I(inode); | |
809 | struct nfs_open_context *pos, *ctx = NULL; | |
810 | ||
811 | spin_lock(&inode->i_lock); | |
812 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
813 | if (cred != NULL && pos->cred != cred) |
814 | continue; | |
1544fa0f TM |
815 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
816 | continue; | |
817 | ctx = get_nfs_open_context(pos); | |
818 | break; | |
1da177e4 LT |
819 | } |
820 | spin_unlock(&inode->i_lock); | |
821 | return ctx; | |
822 | } | |
823 | ||
b92dccf6 | 824 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 825 | { |
cd3758e3 | 826 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
827 | |
828 | if (ctx) { | |
c45ffdd2 TM |
829 | struct inode *inode = ctx->dentry->d_inode; |
830 | ||
1da177e4 LT |
831 | filp->private_data = NULL; |
832 | spin_lock(&inode->i_lock); | |
833 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
834 | spin_unlock(&inode->i_lock); | |
f895c53f | 835 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
836 | } |
837 | } | |
838 | ||
839 | /* | |
840 | * These allocate and release file read/write context information. | |
841 | */ | |
842 | int nfs_open(struct inode *inode, struct file *filp) | |
843 | { | |
844 | struct nfs_open_context *ctx; | |
1da177e4 | 845 | |
5ede7b1c AV |
846 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
847 | if (IS_ERR(ctx)) | |
848 | return PTR_ERR(ctx); | |
1da177e4 LT |
849 | nfs_file_set_open_context(filp, ctx); |
850 | put_nfs_open_context(ctx); | |
f1fe29b4 | 851 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
852 | return 0; |
853 | } | |
854 | ||
855 | int nfs_release(struct inode *inode, struct file *filp) | |
856 | { | |
1da177e4 LT |
857 | nfs_file_clear_open_context(filp); |
858 | return 0; | |
859 | } | |
860 | ||
861 | /* | |
862 | * This function is called whenever some part of NFS notices that | |
863 | * the cached attributes have to be refreshed. | |
864 | */ | |
865 | int | |
866 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
867 | { | |
868 | int status = -ESTALE; | |
1775fd3e | 869 | struct nfs4_label *label = NULL; |
a3cba2aa | 870 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 871 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 872 | |
1e8968c5 NV |
873 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
874 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 875 | |
f4ce1299 TM |
876 | trace_nfs_revalidate_inode_enter(inode); |
877 | ||
85233a7a | 878 | if (is_bad_inode(inode)) |
691beb13 | 879 | goto out; |
1da177e4 | 880 | if (NFS_STALE(inode)) |
412d582e | 881 | goto out; |
7fdc49c4 | 882 | |
a3cba2aa TM |
883 | status = -ENOMEM; |
884 | fattr = nfs_alloc_fattr(); | |
885 | if (fattr == NULL) | |
886 | goto out; | |
887 | ||
691beb13 | 888 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
889 | |
890 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
891 | if (IS_ERR(label)) { | |
892 | status = PTR_ERR(label); | |
893 | goto out; | |
894 | } | |
895 | ||
1775fd3e | 896 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 | 897 | if (status != 0) { |
1e8968c5 | 898 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 899 | inode->i_sb->s_id, |
1e8968c5 | 900 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
901 | if (status == -ESTALE) { |
902 | nfs_zap_caches(inode); | |
903 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 904 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 905 | } |
14c43f76 | 906 | goto err_out; |
1da177e4 LT |
907 | } |
908 | ||
a3cba2aa | 909 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 910 | if (status) { |
1e8968c5 | 911 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 912 | inode->i_sb->s_id, |
1e8968c5 | 913 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 914 | goto err_out; |
1da177e4 | 915 | } |
55296809 | 916 | |
24aa1fe6 | 917 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 918 | nfs_zap_acl_cache(inode); |
55296809 | 919 | |
3da580aa JL |
920 | nfs_setsecurity(inode, fattr, label); |
921 | ||
1e8968c5 | 922 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 923 | inode->i_sb->s_id, |
1e8968c5 | 924 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 925 | |
14c43f76 DQ |
926 | err_out: |
927 | nfs4_label_free(label); | |
928 | out: | |
a3cba2aa | 929 | nfs_free_fattr(fattr); |
f4ce1299 | 930 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
931 | return status; |
932 | } | |
933 | ||
934 | int nfs_attribute_timeout(struct inode *inode) | |
935 | { | |
936 | struct nfs_inode *nfsi = NFS_I(inode); | |
937 | ||
d7cf8dd0 TM |
938 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
939 | } | |
940 | ||
43f291cd | 941 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 942 | { |
b4d2314b | 943 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 944 | return 0; |
d7cf8dd0 | 945 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
946 | } |
947 | ||
948 | /** | |
949 | * nfs_revalidate_inode - Revalidate the inode attributes | |
950 | * @server - pointer to nfs_server struct | |
951 | * @inode - pointer to inode struct | |
952 | * | |
953 | * Updates inode attribute information by retrieving the data from the server. | |
954 | */ | |
955 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
956 | { | |
aa9c2669 DQ |
957 | if (!(NFS_I(inode)->cache_validity & |
958 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
d7cf8dd0 | 959 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
960 | return NFS_STALE(inode) ? -ESTALE : 0; |
961 | return __nfs_revalidate_inode(server, inode); | |
962 | } | |
1c606fb7 | 963 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 964 | |
1cda707d | 965 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
966 | { |
967 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
968 | int ret; |
969 | ||
717d44e8 | 970 | if (mapping->nrpages != 0) { |
f8806c84 TM |
971 | if (S_ISREG(inode->i_mode)) { |
972 | ret = nfs_sync_mapping(mapping); | |
973 | if (ret < 0) | |
974 | return ret; | |
975 | } | |
976 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
977 | if (ret < 0) |
978 | return ret; | |
979 | } | |
980 | spin_lock(&inode->i_lock); | |
981 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 982 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 983 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
984 | spin_unlock(&inode->i_lock); |
985 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
de242c0b | 986 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 987 | |
1e8968c5 NV |
988 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
989 | inode->i_sb->s_id, | |
990 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
991 | return 0; |
992 | } | |
993 | ||
b4b1eadf TM |
994 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
995 | { | |
996 | if (nfs_have_delegated_attributes(inode)) | |
997 | return false; | |
998 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
999 | || nfs_attribute_timeout(inode) | |
1000 | || NFS_STALE(inode); | |
1001 | } | |
1002 | ||
717d44e8 TM |
1003 | /** |
1004 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1005 | * @inode - pointer to host inode | |
1006 | * @mapping - pointer to mapping | |
717d44e8 TM |
1007 | */ |
1008 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1009 | { | |
1010 | struct nfs_inode *nfsi = NFS_I(inode); | |
1011 | int ret = 0; | |
dc59250c | 1012 | |
29418aa4 MG |
1013 | /* swapfiles are not supposed to be shared. */ |
1014 | if (IS_SWAPFILE(inode)) | |
1015 | goto out; | |
1016 | ||
b4b1eadf | 1017 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1018 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1019 | if (ret < 0) | |
1020 | goto out; | |
7d52e862 | 1021 | } |
f4ce1299 TM |
1022 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { |
1023 | trace_nfs_invalidate_mapping_enter(inode); | |
717d44e8 | 1024 | ret = nfs_invalidate_mapping(inode, mapping); |
f4ce1299 TM |
1025 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1026 | } | |
1027 | ||
cd9ae2b6 | 1028 | out: |
44b11874 | 1029 | return ret; |
7d52e862 TM |
1030 | } |
1031 | ||
27dc1cd3 | 1032 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1033 | { |
1034 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1035 | unsigned long ret = 0; |
a895b4a1 | 1036 | |
9e6e70f8 TM |
1037 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1038 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1039 | && inode->i_version == fattr->pre_change_attr) { |
1040 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
1041 | if (S_ISDIR(inode->i_mode)) |
1042 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 1043 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1044 | } |
a895b4a1 | 1045 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1046 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1047 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1048 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1049 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1050 | ret |= NFS_INO_INVALID_ATTR; | |
1051 | } | |
9e6e70f8 TM |
1052 | |
1053 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1054 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1055 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1056 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1057 | if (S_ISDIR(inode->i_mode)) | |
1058 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1059 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 1060 | } |
9e6e70f8 TM |
1061 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1062 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1063 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
1064 | && nfsi->npages == 0) { |
1065 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
1066 | ret |= NFS_INO_INVALID_ATTR; | |
1067 | } | |
de242c0b DH |
1068 | |
1069 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
1070 | nfs_fscache_invalidate(inode); | |
1071 | ||
27dc1cd3 | 1072 | return ret; |
a895b4a1 TM |
1073 | } |
1074 | ||
1da177e4 | 1075 | /** |
33801147 | 1076 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1077 | * @inode - pointer to inode |
1078 | * @fattr - updated attributes | |
1079 | * | |
1080 | * Verifies the attribute cache. If we have just changed the attributes, | |
1081 | * so that fattr carries weak cache consistency data, then it may | |
1082 | * also update the ctime/mtime/change_attribute. | |
1083 | */ | |
33801147 | 1084 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1085 | { |
1086 | struct nfs_inode *nfsi = NFS_I(inode); | |
1087 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1088 | unsigned long invalid = 0; |
1da177e4 | 1089 | |
dc59250c | 1090 | |
01da47bd TM |
1091 | if (nfs_have_delegated_attributes(inode)) |
1092 | return 0; | |
ca62b9c3 | 1093 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1094 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1095 | return -EIO; | |
1096 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1097 | return -EIO; |
ca62b9c3 | 1098 | |
9e6e70f8 | 1099 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 1100 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 1101 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1102 | |
1da177e4 | 1103 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1104 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1105 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1106 | |
9e6e70f8 TM |
1107 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1108 | cur_size = i_size_read(inode); | |
1109 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1110 | if (cur_size != new_isize && nfsi->npages == 0) | |
1111 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1112 | } | |
1da177e4 LT |
1113 | |
1114 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1115 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1116 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1117 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1118 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1119 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1120 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1121 | |
1122 | /* Has the link count changed? */ | |
9e6e70f8 | 1123 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1124 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1125 | |
9e6e70f8 | 1126 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1127 | invalid |= NFS_INO_INVALID_ATIME; |
1128 | ||
1129 | if (invalid != 0) | |
1130 | nfsi->cache_validity |= invalid; | |
1da177e4 | 1131 | |
33801147 | 1132 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1133 | return 0; |
1134 | } | |
1135 | ||
a10ad176 | 1136 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1137 | { |
9e6e70f8 TM |
1138 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1139 | return 0; | |
a10ad176 TM |
1140 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1141 | } | |
1142 | ||
1143 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1144 | { | |
9e6e70f8 TM |
1145 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1146 | return 0; | |
a10ad176 TM |
1147 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1148 | } | |
870a5be8 | 1149 | |
ae05f269 | 1150 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1151 | |
1152 | static unsigned long nfs_read_attr_generation_counter(void) | |
1153 | { | |
ae05f269 | 1154 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1155 | } |
1156 | ||
1157 | unsigned long nfs_inc_attr_generation_counter(void) | |
1158 | { | |
ae05f269 | 1159 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1160 | } |
1161 | ||
1162 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1163 | { | |
1164 | fattr->valid = 0; | |
1165 | fattr->time_start = jiffies; | |
1166 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1167 | fattr->owner_name = NULL; |
1168 | fattr->group_name = NULL; | |
4704f0e2 | 1169 | } |
ddda8e0a | 1170 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1171 | |
2d36bfde TM |
1172 | struct nfs_fattr *nfs_alloc_fattr(void) |
1173 | { | |
1174 | struct nfs_fattr *fattr; | |
1175 | ||
1176 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1177 | if (fattr != NULL) | |
1178 | nfs_fattr_init(fattr); | |
1179 | return fattr; | |
1180 | } | |
ddda8e0a | 1181 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1182 | |
1183 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1184 | { | |
1185 | struct nfs_fh *fh; | |
1186 | ||
1187 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1188 | if (fh != NULL) | |
1189 | fh->size = 0; | |
1190 | return fh; | |
1191 | } | |
ddda8e0a | 1192 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1193 | |
e27d359e | 1194 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1195 | /* |
1196 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1197 | * in the same way that wireshark does | |
1198 | * | |
1199 | * @fh: file handle | |
1200 | * | |
1201 | * For debugging only. | |
1202 | */ | |
1203 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1204 | { | |
1205 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1206 | * not on the result */ | |
1264a2f0 | 1207 | return nfs_fhandle_hash(fh); |
d8e0539e | 1208 | } |
9e6ee76d | 1209 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1210 | |
1211 | /* | |
20d27e92 CL |
1212 | * _nfs_display_fhandle - display an NFS file handle on the console |
1213 | * | |
1214 | * @fh: file handle to display | |
1215 | * @caption: display caption | |
1216 | * | |
1217 | * For debugging only. | |
1218 | */ | |
20d27e92 CL |
1219 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1220 | { | |
1221 | unsigned short i; | |
1222 | ||
fa68a1ba | 1223 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1224 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1225 | return; | |
1226 | } | |
1227 | ||
d8e0539e WAA |
1228 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1229 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1230 | for (i = 0; i < fh->size; i += 16) { |
1231 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1232 | ||
1233 | switch ((fh->size - i - 1) >> 2) { | |
1234 | case 0: | |
1235 | printk(KERN_DEFAULT " %08x\n", | |
1236 | be32_to_cpup(pos)); | |
1237 | break; | |
1238 | case 1: | |
1239 | printk(KERN_DEFAULT " %08x %08x\n", | |
1240 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1241 | break; | |
1242 | case 2: | |
1243 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1244 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1245 | be32_to_cpup(pos + 2)); | |
1246 | break; | |
1247 | default: | |
1248 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1249 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1250 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1251 | } | |
1252 | } | |
1253 | } | |
9e6ee76d | 1254 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1255 | #endif |
1256 | ||
a10ad176 TM |
1257 | /** |
1258 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1259 | * @inode - pointer to inode | |
1260 | * @fattr - attributes | |
1261 | * | |
1262 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1263 | * attributes got scheduled after another call carrying updated ones. | |
1264 | * | |
1265 | * To do so, the function first assumes that a more recent ctime means | |
1266 | * that the attributes in fattr are newer, however it also attempt to | |
1267 | * catch the case where ctime either didn't change, or went backwards | |
1268 | * (if someone reset the clock on the server) by looking at whether | |
1269 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1270 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1271 | * |
1272 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1273 | * more recent than the ones cached in the inode. | |
1274 | * | |
1275 | */ | |
1276 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1277 | { | |
1278 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1279 | ||
4704f0e2 | 1280 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1281 | nfs_ctime_need_update(inode, fattr) || |
1282 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1283 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1284 | } |
1285 | ||
d8c951c3 TM |
1286 | /* |
1287 | * Don't trust the change_attribute, mtime, ctime or size if | |
1288 | * a pnfs LAYOUTCOMMIT is outstanding | |
1289 | */ | |
1290 | static void nfs_inode_attrs_handle_layoutcommit(struct inode *inode, | |
1291 | struct nfs_fattr *fattr) | |
1292 | { | |
1293 | if (pnfs_layoutcommit_outstanding(inode)) | |
1294 | fattr->valid &= ~(NFS_ATTR_FATTR_CHANGE | | |
1295 | NFS_ATTR_FATTR_MTIME | | |
1296 | NFS_ATTR_FATTR_CTIME | | |
1297 | NFS_ATTR_FATTR_SIZE); | |
1298 | } | |
1299 | ||
a10ad176 TM |
1300 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1301 | { | |
f4ce1299 TM |
1302 | int ret; |
1303 | ||
1304 | trace_nfs_refresh_inode_enter(inode); | |
1305 | ||
d8c951c3 TM |
1306 | nfs_inode_attrs_handle_layoutcommit(inode, fattr); |
1307 | ||
a10ad176 | 1308 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1309 | ret = nfs_update_inode(inode, fattr); |
1310 | else | |
1311 | ret = nfs_check_inode_attributes(inode, fattr); | |
1312 | ||
1313 | trace_nfs_refresh_inode_exit(inode, ret); | |
1314 | return ret; | |
870a5be8 TM |
1315 | } |
1316 | ||
33801147 TM |
1317 | /** |
1318 | * nfs_refresh_inode - try to update the inode attribute cache | |
1319 | * @inode - pointer to inode | |
1320 | * @fattr - updated attributes | |
1321 | * | |
1322 | * Check that an RPC call that returned attributes has not overlapped with | |
1323 | * other recent updates of the inode metadata, then decide whether it is | |
1324 | * safe to do a full update of the inode attributes, or whether just to | |
1325 | * call nfs_check_inode_attributes. | |
1326 | */ | |
1327 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1328 | { | |
33801147 TM |
1329 | int status; |
1330 | ||
1331 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1332 | return 0; | |
1333 | spin_lock(&inode->i_lock); | |
870a5be8 | 1334 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1335 | spin_unlock(&inode->i_lock); |
ef79c097 | 1336 | |
33801147 TM |
1337 | return status; |
1338 | } | |
ddda8e0a | 1339 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1340 | |
d65f557f TM |
1341 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1342 | { | |
1343 | struct nfs_inode *nfsi = NFS_I(inode); | |
1344 | ||
1345 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
de242c0b | 1346 | if (S_ISDIR(inode->i_mode)) { |
d65f557f | 1347 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
de242c0b DH |
1348 | nfs_fscache_invalidate(inode); |
1349 | } | |
d65f557f TM |
1350 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1351 | return 0; | |
1352 | return nfs_refresh_inode_locked(inode, fattr); | |
1353 | } | |
1354 | ||
decf491f TM |
1355 | /** |
1356 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1357 | * @inode - pointer to inode | |
1358 | * @fattr - updated attributes | |
1359 | * | |
1360 | * After an operation that has changed the inode metadata, mark the | |
1361 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1362 | * |
1363 | * NB: if the server didn't return any post op attributes, this | |
1364 | * function will force the retrieval of attributes before the next | |
1365 | * NFS request. Thus it should be used only for operations that | |
1366 | * are expected to change one or more attributes, to avoid | |
1367 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1368 | */ |
1369 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1370 | { | |
d65f557f | 1371 | int status; |
decf491f | 1372 | |
7668fdbe | 1373 | spin_lock(&inode->i_lock); |
d65f557f | 1374 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1375 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1376 | |
870a5be8 | 1377 | return status; |
decf491f | 1378 | } |
1c606fb7 | 1379 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1380 | |
70ca8852 TM |
1381 | /** |
1382 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1383 | * @inode - pointer to inode | |
1384 | * @fattr - updated attributes | |
1385 | * | |
1386 | * After an operation that has changed the inode metadata, mark the | |
1387 | * attribute cache as being invalid, then try to update it. Fake up | |
1388 | * weak cache consistency data, if none exist. | |
1389 | * | |
1390 | * This function is mainly designed to be used by the ->write_done() functions. | |
1391 | */ | |
1392 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1393 | { | |
d65f557f TM |
1394 | int status; |
1395 | ||
1396 | spin_lock(&inode->i_lock); | |
1397 | /* Don't do a WCC update if these attributes are already stale */ | |
1398 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1399 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1400 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1401 | | NFS_ATTR_FATTR_PRESIZE | |
1402 | | NFS_ATTR_FATTR_PREMTIME | |
1403 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1404 | goto out_noforce; |
1405 | } | |
9e6e70f8 TM |
1406 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1407 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1408 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1409 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1410 | } |
9e6e70f8 TM |
1411 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1412 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1413 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1414 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1415 | } | |
1416 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1417 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1418 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1419 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1420 | } | |
1421 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1422 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1423 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1424 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1425 | } |
d65f557f TM |
1426 | out_noforce: |
1427 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1428 | spin_unlock(&inode->i_lock); | |
1429 | return status; | |
70ca8852 | 1430 | } |
ddda8e0a | 1431 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1432 | |
1da177e4 LT |
1433 | /* |
1434 | * Many nfs protocol calls return the new file attributes after | |
1435 | * an operation. Here we update the inode to reflect the state | |
1436 | * of the server's inode. | |
1437 | * | |
1438 | * This is a bit tricky because we have to make sure all dirty pages | |
1439 | * have been sent off to the server before calling invalidate_inode_pages. | |
1440 | * To make sure no other process adds more write requests while we try | |
1441 | * our best to flush them, we make them sleep during the attribute refresh. | |
1442 | * | |
1443 | * A very similar scenario holds for the dir cache. | |
1444 | */ | |
24aa1fe6 | 1445 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1446 | { |
8b4bdcf8 | 1447 | struct nfs_server *server; |
1da177e4 | 1448 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1449 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1450 | unsigned long invalid = 0; |
3e7d950a | 1451 | unsigned long now = jiffies; |
62ab460c | 1452 | unsigned long save_cache_validity; |
1da177e4 | 1453 | |
1e8968c5 | 1454 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1455 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1456 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1457 | atomic_read(&inode->i_count), fattr->valid); |
1458 | ||
e73e6c9e MT |
1459 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1460 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1461 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1462 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1463 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1464 | (long long)fattr->fileid); | |
1465 | goto out_err; | |
1466 | } | |
1da177e4 LT |
1467 | |
1468 | /* | |
1469 | * Make sure the inode's type hasn't changed. | |
1470 | */ | |
e73e6c9e MT |
1471 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1472 | /* | |
1473 | * Big trouble! The inode has become a different object. | |
1474 | */ | |
1e8968c5 | 1475 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1476 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1477 | goto out_err; | |
1478 | } | |
1da177e4 | 1479 | |
8b4bdcf8 | 1480 | server = NFS_SERVER(inode); |
a0356862 | 1481 | /* Update the fsid? */ |
9e6e70f8 | 1482 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1483 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1484 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1485 | server->fsid = fattr->fsid; |
1486 | ||
1da177e4 LT |
1487 | /* |
1488 | * Update the read time so we don't revalidate too often. | |
1489 | */ | |
33801147 | 1490 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1491 | |
62ab460c TM |
1492 | save_cache_validity = nfsi->cache_validity; |
1493 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1494 | | NFS_INO_INVALID_ATIME | |
1495 | | NFS_INO_REVAL_FORCED | |
1496 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1497 | |
a895b4a1 | 1498 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1499 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1500 | |
47aabaa7 | 1501 | /* More cache consistency checks */ |
9e6e70f8 | 1502 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1503 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1504 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1505 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1506 | invalid |= NFS_INO_INVALID_ATTR |
1507 | | NFS_INO_INVALID_DATA | |
1508 | | NFS_INO_INVALID_ACCESS | |
1509 | | NFS_INO_INVALID_ACL | |
1510 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1511 | if (S_ISDIR(inode->i_mode)) |
1512 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1513 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1514 | } |
62ab460c TM |
1515 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1516 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1517 | |
1518 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1519 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c TM |
1520 | } else if (server->caps & NFS_CAP_MTIME) |
1521 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1522 | | NFS_INO_REVAL_FORCED); |
1523 | ||
9e6e70f8 | 1524 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1525 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c TM |
1526 | } else if (server->caps & NFS_CAP_CTIME) |
1527 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c | 1528 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1529 | |
951a143b | 1530 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1531 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1532 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1533 | cur_isize = i_size_read(inode); | |
1534 | if (new_isize != cur_isize) { | |
1535 | /* Do we perhaps have any outstanding writes, or has | |
1536 | * the file grown beyond our last write? */ | |
d8c951c3 | 1537 | if ((nfsi->npages == 0) || new_isize > cur_isize) { |
9e6e70f8 TM |
1538 | i_size_write(inode, new_isize); |
1539 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1540 | } | |
60c16ea8 HJ |
1541 | dprintk("NFS: isize change on server for file %s/%ld " |
1542 | "(%Ld to %Ld)\n", | |
1543 | inode->i_sb->s_id, | |
1544 | inode->i_ino, | |
1545 | (long long)cur_isize, | |
1546 | (long long)new_isize); | |
1da177e4 | 1547 | } |
62ab460c TM |
1548 | } else |
1549 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1550 | | NFS_INO_REVAL_PAGECACHE | |
1551 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1552 | |
1da177e4 | 1553 | |
9e6e70f8 TM |
1554 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1555 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1556 | else if (server->caps & NFS_CAP_ATIME) |
1557 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1558 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1559 | |
9e6e70f8 TM |
1560 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1561 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1562 | umode_t newmode = inode->i_mode & S_IFMT; |
1563 | newmode |= fattr->mode & S_IALLUGO; | |
1564 | inode->i_mode = newmode; | |
9e6e70f8 | 1565 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1566 | } |
62ab460c TM |
1567 | } else if (server->caps & NFS_CAP_MODE) |
1568 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1569 | | NFS_INO_INVALID_ACCESS | |
1570 | | NFS_INO_INVALID_ACL | |
1571 | | NFS_INO_REVAL_FORCED); | |
1572 | ||
9e6e70f8 | 1573 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1574 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1575 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1576 | inode->i_uid = fattr->uid; | |
1577 | } | |
62ab460c TM |
1578 | } else if (server->caps & NFS_CAP_OWNER) |
1579 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1580 | | NFS_INO_INVALID_ACCESS | |
1581 | | NFS_INO_INVALID_ACL | |
1582 | | NFS_INO_REVAL_FORCED); | |
1583 | ||
9e6e70f8 | 1584 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1585 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1586 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1587 | inode->i_gid = fattr->gid; | |
1588 | } | |
62ab460c TM |
1589 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1590 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1591 | | NFS_INO_INVALID_ACCESS | |
1592 | | NFS_INO_INVALID_ACL | |
1593 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1594 | |
9e6e70f8 TM |
1595 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1596 | if (inode->i_nlink != fattr->nlink) { | |
1597 | invalid |= NFS_INO_INVALID_ATTR; | |
1598 | if (S_ISDIR(inode->i_mode)) | |
1599 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1600 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1601 | } |
62ab460c TM |
1602 | } else if (server->caps & NFS_CAP_NLINK) |
1603 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1604 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1605 | |
9e6e70f8 | 1606 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1607 | /* |
1608 | * report the blocks in 512byte units | |
1609 | */ | |
1610 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1611 | } |
9e6e70f8 TM |
1612 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1613 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1614 | |
1615 | /* Update attrtimeo value if we're out of the unstable period */ | |
aa9c2669 | 1616 | if (invalid & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) { |
91d5b470 | 1617 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1618 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1619 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1620 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1621 | } else { |
64672d55 | 1622 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1623 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1624 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1625 | nfsi->attrtimeo_timestamp = now; | |
1626 | } | |
1da177e4 | 1627 | } |
f2115dc9 | 1628 | invalid &= ~NFS_INO_INVALID_ATTR; |
aa9c2669 | 1629 | invalid &= ~NFS_INO_INVALID_LABEL; |
1da177e4 LT |
1630 | /* Don't invalidate the data if we were to blame */ |
1631 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1632 | || S_ISLNK(inode->i_mode))) | |
1633 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1634 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1635 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1636 | nfsi->cache_validity |= invalid; |
1da177e4 | 1637 | |
de242c0b DH |
1638 | if (invalid & NFS_INO_INVALID_DATA) |
1639 | nfs_fscache_invalidate(inode); | |
1640 | ||
1da177e4 | 1641 | return 0; |
b37b03b7 | 1642 | out_err: |
1da177e4 LT |
1643 | /* |
1644 | * No need to worry about unhashing the dentry, as the | |
1645 | * lookup validation will know that the inode is bad. | |
1646 | * (But we fall through to invalidate the caches.) | |
1647 | */ | |
1648 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1649 | return -ESTALE; |
1650 | } | |
1651 | ||
f7b422b1 | 1652 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1653 | { |
1654 | struct nfs_inode *nfsi; | |
e94b1766 | 1655 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1656 | if (!nfsi) |
1657 | return NULL; | |
55296809 CL |
1658 | nfsi->flags = 0UL; |
1659 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1660 | #ifdef CONFIG_NFS_V3_ACL |
1661 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1662 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1663 | #endif | |
89d77c8f | 1664 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1665 | nfsi->nfs4_acl = NULL; |
1666 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1667 | return &nfsi->vfs_inode; |
1668 | } | |
89d77c8f | 1669 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1670 | |
fa0d7e3d | 1671 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1672 | { |
fa0d7e3d | 1673 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1674 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1675 | } | |
1676 | ||
fa0d7e3d NP |
1677 | void nfs_destroy_inode(struct inode *inode) |
1678 | { | |
1679 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1680 | } | |
89d77c8f | 1681 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1682 | |
d75d5414 AM |
1683 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1684 | { | |
89d77c8f | 1685 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1686 | INIT_LIST_HEAD(&nfsi->open_states); |
1687 | nfsi->delegation = NULL; | |
1688 | nfsi->delegation_state = 0; | |
1689 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1690 | nfsi->layout = NULL; |
d75d5414 AM |
1691 | #endif |
1692 | } | |
f7b422b1 | 1693 | |
51cc5068 | 1694 | static void init_once(void *foo) |
1da177e4 LT |
1695 | { |
1696 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1697 | ||
a35afb83 | 1698 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1699 | INIT_LIST_HEAD(&nfsi->open_files); |
1700 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1701 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1702 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1703 | nfsi->npages = 0; |
ea2cf228 | 1704 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1705 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1706 | atomic_set(&nfsi->silly_count, 1); |
1707 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1708 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1709 | nfs4_init_once(nfsi); |
1da177e4 | 1710 | } |
20c2df83 | 1711 | |
f7b422b1 | 1712 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1713 | { |
1714 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1715 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1716 | 0, (SLAB_RECLAIM_ACCOUNT| |
1717 | SLAB_MEM_SPREAD), | |
20c2df83 | 1718 | init_once); |
1da177e4 LT |
1719 | if (nfs_inode_cachep == NULL) |
1720 | return -ENOMEM; | |
1721 | ||
1722 | return 0; | |
1723 | } | |
1724 | ||
266bee88 | 1725 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1726 | { |
8c0a8537 KS |
1727 | /* |
1728 | * Make sure all delayed rcu free inodes are flushed before we | |
1729 | * destroy cache. | |
1730 | */ | |
1731 | rcu_barrier(); | |
1a1d92c1 | 1732 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1733 | } |
1734 | ||
5746006f | 1735 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1736 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1737 | |
1738 | /* | |
1739 | * start up the nfsiod workqueue | |
1740 | */ | |
1741 | static int nfsiod_start(void) | |
1742 | { | |
1743 | struct workqueue_struct *wq; | |
1744 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1745 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1746 | if (wq == NULL) |
1747 | return -ENOMEM; | |
1748 | nfsiod_workqueue = wq; | |
1749 | return 0; | |
1750 | } | |
1751 | ||
1752 | /* | |
1753 | * Destroy the nfsiod workqueue | |
1754 | */ | |
1755 | static void nfsiod_stop(void) | |
1756 | { | |
1757 | struct workqueue_struct *wq; | |
1758 | ||
1759 | wq = nfsiod_workqueue; | |
1760 | if (wq == NULL) | |
1761 | return; | |
1762 | nfsiod_workqueue = NULL; | |
1763 | destroy_workqueue(wq); | |
1764 | } | |
1765 | ||
1b340d01 | 1766 | int nfs_net_id; |
9e2e74db | 1767 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1768 | |
1769 | static int nfs_net_init(struct net *net) | |
1770 | { | |
6b13168b | 1771 | nfs_clients_init(net); |
c8d74d9b | 1772 | return 0; |
1b340d01 SK |
1773 | } |
1774 | ||
1775 | static void nfs_net_exit(struct net *net) | |
1776 | { | |
28cd1b3f | 1777 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1778 | } |
1779 | ||
1780 | static struct pernet_operations nfs_net_ops = { | |
1781 | .init = nfs_net_init, | |
1782 | .exit = nfs_net_exit, | |
1783 | .id = &nfs_net_id, | |
1784 | .size = sizeof(struct nfs_net), | |
1785 | }; | |
1786 | ||
1da177e4 LT |
1787 | /* |
1788 | * Initialize NFS | |
1789 | */ | |
1790 | static int __init init_nfs_fs(void) | |
1791 | { | |
1792 | int err; | |
1793 | ||
1b340d01 | 1794 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1795 | if (err < 0) |
89d77c8f | 1796 | goto out9; |
e571cbf1 | 1797 | |
8ec442ae DH |
1798 | err = nfs_fscache_register(); |
1799 | if (err < 0) | |
89d77c8f | 1800 | goto out8; |
8ec442ae | 1801 | |
5746006f TM |
1802 | err = nfsiod_start(); |
1803 | if (err) | |
89d77c8f | 1804 | goto out7; |
5746006f | 1805 | |
6aaca566 DH |
1806 | err = nfs_fs_proc_init(); |
1807 | if (err) | |
89d77c8f | 1808 | goto out6; |
6aaca566 | 1809 | |
1da177e4 LT |
1810 | err = nfs_init_nfspagecache(); |
1811 | if (err) | |
89d77c8f | 1812 | goto out5; |
1da177e4 LT |
1813 | |
1814 | err = nfs_init_inodecache(); | |
1815 | if (err) | |
89d77c8f | 1816 | goto out4; |
1da177e4 LT |
1817 | |
1818 | err = nfs_init_readpagecache(); | |
1819 | if (err) | |
89d77c8f | 1820 | goto out3; |
1da177e4 LT |
1821 | |
1822 | err = nfs_init_writepagecache(); | |
1823 | if (err) | |
89d77c8f | 1824 | goto out2; |
1da177e4 | 1825 | |
1da177e4 LT |
1826 | err = nfs_init_directcache(); |
1827 | if (err) | |
89d77c8f | 1828 | goto out1; |
1da177e4 LT |
1829 | |
1830 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1831 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1832 | #endif |
f7b422b1 | 1833 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1834 | goto out0; |
1835 | ||
1da177e4 | 1836 | return 0; |
129d1977 | 1837 | out0: |
1da177e4 | 1838 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1839 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1840 | #endif |
1da177e4 | 1841 | nfs_destroy_directcache(); |
89d77c8f | 1842 | out1: |
129d1977 | 1843 | nfs_destroy_writepagecache(); |
89d77c8f | 1844 | out2: |
129d1977 | 1845 | nfs_destroy_readpagecache(); |
89d77c8f | 1846 | out3: |
129d1977 | 1847 | nfs_destroy_inodecache(); |
89d77c8f | 1848 | out4: |
129d1977 | 1849 | nfs_destroy_nfspagecache(); |
89d77c8f | 1850 | out5: |
129d1977 | 1851 | nfs_fs_proc_exit(); |
89d77c8f | 1852 | out6: |
129d1977 | 1853 | nfsiod_stop(); |
89d77c8f | 1854 | out7: |
129d1977 | 1855 | nfs_fscache_unregister(); |
89d77c8f | 1856 | out8: |
129d1977 | 1857 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 1858 | out9: |
1da177e4 LT |
1859 | return err; |
1860 | } | |
1861 | ||
1862 | static void __exit exit_nfs_fs(void) | |
1863 | { | |
1da177e4 | 1864 | nfs_destroy_directcache(); |
1da177e4 LT |
1865 | nfs_destroy_writepagecache(); |
1866 | nfs_destroy_readpagecache(); | |
1867 | nfs_destroy_inodecache(); | |
1868 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1869 | nfs_fscache_unregister(); |
1b340d01 | 1870 | unregister_pernet_subsys(&nfs_net_ops); |
1da177e4 | 1871 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1872 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1873 | #endif |
f7b422b1 | 1874 | unregister_nfs_fs(); |
6aaca566 | 1875 | nfs_fs_proc_exit(); |
5746006f | 1876 | nfsiod_stop(); |
1da177e4 LT |
1877 | } |
1878 | ||
1879 | /* Not quite true; I just maintain it */ | |
1880 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1881 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1882 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1883 | |
1884 | module_init(init_nfs_fs) | |
1885 | module_exit(exit_nfs_fs) |