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> |
d8e0539e | 41 | #include <linux/crc32.h> |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <asm/uaccess.h> |
44 | ||
4ce79717 | 45 | #include "nfs4_fs.h" |
a72b4422 | 46 | #include "callback.h" |
1da177e4 | 47 | #include "delegation.h" |
d9ef5a8c | 48 | #include "iostat.h" |
f7b422b1 | 49 | #include "internal.h" |
8ec442ae | 50 | #include "fscache.h" |
e5e94017 | 51 | #include "pnfs.h" |
ab7017a3 | 52 | #include "nfs.h" |
1b340d01 | 53 | #include "netns.h" |
1da177e4 LT |
54 | |
55 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 56 | |
f43bf0be TM |
57 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
58 | ||
59 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 60 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 61 | |
1da177e4 | 62 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 63 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 64 | |
e18b890b | 65 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 66 | |
1da177e4 LT |
67 | static inline unsigned long |
68 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
69 | { | |
70 | return nfs_fileid_to_ino_t(fattr->fileid); | |
71 | } | |
72 | ||
72cb77f4 TM |
73 | /** |
74 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
75 | * @word: long word containing the bit lock | |
76 | */ | |
77 | int nfs_wait_bit_killable(void *word) | |
78 | { | |
79 | if (fatal_signal_pending(current)) | |
80 | return -ERESTARTSYS; | |
416ad3c9 | 81 | freezable_schedule_unsafe(); |
72cb77f4 TM |
82 | return 0; |
83 | } | |
89d77c8f | 84 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 85 | |
f43bf0be TM |
86 | /** |
87 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
88 | * @fileid: 64-bit fileid | |
89 | * | |
90 | * This function returns a 32-bit inode number if the boot parameter | |
91 | * nfs.enable_ino64 is zero. | |
92 | */ | |
93 | u64 nfs_compat_user_ino64(u64 fileid) | |
94 | { | |
3fa0b4e2 FF |
95 | #ifdef CONFIG_COMPAT |
96 | compat_ulong_t ino; | |
97 | #else | |
98 | unsigned long ino; | |
99 | #endif | |
f43bf0be TM |
100 | |
101 | if (enable_ino64) | |
102 | return fileid; | |
103 | ino = fileid; | |
104 | if (sizeof(ino) < sizeof(fileid)) | |
105 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
106 | return ino; | |
107 | } | |
108 | ||
eed99357 TM |
109 | int nfs_drop_inode(struct inode *inode) |
110 | { | |
111 | return NFS_STALE(inode) || generic_drop_inode(inode); | |
112 | } | |
113 | EXPORT_SYMBOL_GPL(nfs_drop_inode); | |
114 | ||
19d87ca3 | 115 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 116 | { |
da6d503a TM |
117 | /* |
118 | * The following should never happen... | |
119 | */ | |
f48407dd TM |
120 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
121 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); | |
ada70d94 | 122 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 123 | nfs_access_zap_cache(inode); |
ef79c097 | 124 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 | 125 | } |
89d77c8f | 126 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 127 | |
b57922d9 AV |
128 | void nfs_evict_inode(struct inode *inode) |
129 | { | |
130 | truncate_inode_pages(&inode->i_data, 0); | |
dbd5768f | 131 | clear_inode(inode); |
b57922d9 AV |
132 | nfs_clear_inode(inode); |
133 | } | |
134 | ||
29884df0 TM |
135 | /** |
136 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
137 | */ | |
138 | int nfs_sync_mapping(struct address_space *mapping) | |
139 | { | |
5cf95214 | 140 | int ret = 0; |
29884df0 | 141 | |
5cf95214 TM |
142 | if (mapping->nrpages != 0) { |
143 | unmap_mapping_range(mapping, 0, 0, 0); | |
144 | ret = nfs_wb_all(mapping->host); | |
145 | } | |
29884df0 TM |
146 | return ret; |
147 | } | |
148 | ||
1da177e4 LT |
149 | /* |
150 | * Invalidate the local caches | |
151 | */ | |
b37b03b7 | 152 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
153 | { |
154 | struct nfs_inode *nfsi = NFS_I(inode); | |
155 | int mode = inode->i_mode; | |
156 | ||
91d5b470 CL |
157 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
158 | ||
c7c20973 TM |
159 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
160 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 161 | |
c3f52af3 | 162 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
de242c0b | 163 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
de242c0b | 164 | nfs_fscache_invalidate(inode); |
aa9c2669 DQ |
165 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
166 | | NFS_INO_INVALID_LABEL | |
167 | | NFS_INO_INVALID_DATA | |
168 | | NFS_INO_INVALID_ACCESS | |
169 | | NFS_INO_INVALID_ACL | |
170 | | NFS_INO_REVAL_PAGECACHE; | |
171 | } else | |
172 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
173 | | NFS_INO_INVALID_LABEL | |
174 | | NFS_INO_INVALID_ACCESS | |
175 | | NFS_INO_INVALID_ACL | |
176 | | NFS_INO_REVAL_PAGECACHE; | |
b37b03b7 | 177 | } |
dc59250c | 178 | |
b37b03b7 TM |
179 | void nfs_zap_caches(struct inode *inode) |
180 | { | |
181 | spin_lock(&inode->i_lock); | |
182 | nfs_zap_caches_locked(inode); | |
dc59250c | 183 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
184 | } |
185 | ||
cd9ae2b6 TM |
186 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
187 | { | |
188 | if (mapping->nrpages != 0) { | |
189 | spin_lock(&inode->i_lock); | |
190 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
de242c0b | 191 | nfs_fscache_invalidate(inode); |
cd9ae2b6 TM |
192 | spin_unlock(&inode->i_lock); |
193 | } | |
194 | } | |
195 | ||
f41f7418 | 196 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
197 | { |
198 | void (*clear_acl_cache)(struct inode *); | |
199 | ||
200 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
201 | if (clear_acl_cache != NULL) | |
202 | clear_acl_cache(inode); | |
dc59250c | 203 | spin_lock(&inode->i_lock); |
55296809 | 204 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 205 | spin_unlock(&inode->i_lock); |
1da177e4 | 206 | } |
1c606fb7 | 207 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 208 | |
c4812998 TM |
209 | void nfs_invalidate_atime(struct inode *inode) |
210 | { | |
211 | spin_lock(&inode->i_lock); | |
212 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
213 | spin_unlock(&inode->i_lock); | |
214 | } | |
ddda8e0a | 215 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 216 | |
1da177e4 | 217 | /* |
b37b03b7 TM |
218 | * Invalidate, but do not unhash, the inode. |
219 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 220 | */ |
b37b03b7 | 221 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 222 | { |
3a10c30a | 223 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 224 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
225 | } |
226 | ||
227 | struct nfs_find_desc { | |
228 | struct nfs_fh *fh; | |
229 | struct nfs_fattr *fattr; | |
230 | }; | |
231 | ||
232 | /* | |
233 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
234 | * this, and re-exported directories (also seen in NFSv2) | |
235 | * we are forced to allow 2 different inodes to have the same | |
236 | * i_ino. | |
237 | */ | |
238 | static int | |
239 | nfs_find_actor(struct inode *inode, void *opaque) | |
240 | { | |
241 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
242 | struct nfs_fh *fh = desc->fh; | |
243 | struct nfs_fattr *fattr = desc->fattr; | |
244 | ||
245 | if (NFS_FILEID(inode) != fattr->fileid) | |
246 | return 0; | |
f6488c9b JL |
247 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
248 | return 0; | |
1da177e4 LT |
249 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
250 | return 0; | |
251 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
252 | return 0; | |
253 | return 1; | |
254 | } | |
255 | ||
256 | static int | |
257 | nfs_init_locked(struct inode *inode, void *opaque) | |
258 | { | |
259 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
260 | struct nfs_fattr *fattr = desc->fattr; | |
261 | ||
99fadcd7 | 262 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
263 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
264 | return 0; | |
265 | } | |
266 | ||
e058f70b | 267 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
aa9c2669 DQ |
268 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
269 | struct nfs4_label *label) | |
270 | { | |
271 | int error; | |
272 | ||
273 | if (label == NULL) | |
274 | return; | |
275 | ||
276 | if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL) == 0) | |
277 | return; | |
278 | ||
279 | if (NFS_SERVER(inode)->nfs_client->cl_minorversion < 2) | |
280 | return; | |
281 | ||
282 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { | |
283 | error = security_inode_notifysecctx(inode, label->label, | |
284 | label->len); | |
285 | if (error) | |
286 | printk(KERN_ERR "%s() %s %d " | |
287 | "security_inode_notifysecctx() %d\n", | |
288 | __func__, | |
289 | (char *)label->label, | |
290 | label->len, error); | |
291 | } | |
292 | } | |
293 | ||
e058f70b SD |
294 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
295 | { | |
296 | struct nfs4_label *label = NULL; | |
297 | int minor_version = server->nfs_client->cl_minorversion; | |
298 | ||
299 | if (minor_version < 2) | |
300 | return label; | |
301 | ||
302 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
303 | return label; | |
304 | ||
305 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
306 | if (label == NULL) | |
307 | return ERR_PTR(-ENOMEM); | |
308 | ||
309 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
310 | if (label->label == NULL) { | |
311 | kfree(label); | |
312 | return ERR_PTR(-ENOMEM); | |
313 | } | |
314 | label->len = NFS4_MAXLABELLEN; | |
315 | ||
316 | return label; | |
317 | } | |
318 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 DQ |
319 | #else |
320 | void inline nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, | |
321 | struct nfs4_label *label) | |
322 | { | |
323 | } | |
e058f70b | 324 | #endif |
aa9c2669 | 325 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 326 | |
1da177e4 LT |
327 | /* |
328 | * This is our front-end to iget that looks up inodes by file handle | |
329 | * instead of inode number. | |
330 | */ | |
331 | struct inode * | |
1775fd3e | 332 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
333 | { |
334 | struct nfs_find_desc desc = { | |
335 | .fh = fh, | |
336 | .fattr = fattr | |
337 | }; | |
03f28e3a | 338 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
339 | unsigned long hash; |
340 | ||
7ebb9315 BS |
341 | nfs_attr_check_mountpoint(sb, fattr); |
342 | ||
533eb461 AA |
343 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
344 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 345 | goto out_no_inode; |
9e6e70f8 | 346 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 347 | goto out_no_inode; |
1da177e4 LT |
348 | |
349 | hash = nfs_fattr_to_ino_t(fattr); | |
350 | ||
03f28e3a TM |
351 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
352 | if (inode == NULL) { | |
353 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 354 | goto out_no_inode; |
03f28e3a | 355 | } |
1da177e4 LT |
356 | |
357 | if (inode->i_state & I_NEW) { | |
358 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 359 | unsigned long now = jiffies; |
1da177e4 LT |
360 | |
361 | /* We set i_ino for the few things that still rely on it, | |
362 | * such as stat(2) */ | |
363 | inode->i_ino = hash; | |
364 | ||
365 | /* We can't support update_atime(), since the server will reset it */ | |
366 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
367 | inode->i_mode = fattr->mode; | |
62ab460c TM |
368 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
369 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
4124bbc5 | 370 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
371 | /* Why so? Because we want revalidate for devices/FIFOs, and |
372 | * that's precisely what we have in nfs_file_inode_operations. | |
373 | */ | |
8fa5c000 | 374 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 375 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 376 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
377 | inode->i_data.a_ops = &nfs_file_aops; |
378 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
379 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 380 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 381 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 382 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 383 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
384 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
385 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
386 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
387 | inode->i_op = &nfs_referral_inode_operations; | |
388 | else | |
389 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 390 | inode->i_fop = NULL; |
36d43a43 | 391 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 392 | } |
1da177e4 LT |
393 | } else if (S_ISLNK(inode->i_mode)) |
394 | inode->i_op = &nfs_symlink_inode_operations; | |
395 | else | |
396 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
397 | ||
9e6e70f8 TM |
398 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
399 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
400 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 401 | inode->i_version = 0; |
9e6e70f8 | 402 | inode->i_size = 0; |
6d6b77f1 | 403 | clear_nlink(inode); |
9ff593c4 EB |
404 | inode->i_uid = make_kuid(&init_user_ns, -2); |
405 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
406 | inode->i_blocks = 0; |
407 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
408 | nfsi->write_io = 0; |
409 | nfsi->read_io = 0; | |
9e6e70f8 | 410 | |
33801147 | 411 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 412 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
413 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
414 | inode->i_atime = fattr->atime; | |
62ab460c TM |
415 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
416 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
417 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
418 | inode->i_mtime = fattr->mtime; | |
62ab460c | 419 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
4124bbc5 | 420 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
421 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
422 | inode->i_ctime = fattr->ctime; | |
62ab460c | 423 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
4124bbc5 | 424 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 | 425 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 426 | inode->i_version = fattr->change_attr; |
62ab460c | 427 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
4124bbc5 | 428 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
429 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
430 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
431 | else |
432 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
62ab460c | 433 | | NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 434 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 435 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
436 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
437 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
438 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
439 | inode->i_uid = fattr->uid; | |
62ab460c | 440 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
4124bbc5 | 441 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
442 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
443 | inode->i_gid = fattr->gid; | |
62ab460c | 444 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
4124bbc5 | 445 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
446 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
447 | inode->i_blocks = fattr->du.nfs2.blocks; | |
448 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
449 | /* |
450 | * report the blocks in 512byte units | |
451 | */ | |
452 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 453 | } |
aa9c2669 DQ |
454 | |
455 | nfs_setsecurity(inode, fattr, label); | |
456 | ||
1da177e4 | 457 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 458 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 459 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 460 | |
ef79c097 DH |
461 | nfs_fscache_init_inode_cookie(inode); |
462 | ||
1da177e4 LT |
463 | unlock_new_inode(inode); |
464 | } else | |
465 | nfs_refresh_inode(inode, fattr); | |
aa9c2669 | 466 | nfs_setsecurity(inode, fattr, label); |
4f1abd22 | 467 | dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n", |
1da177e4 LT |
468 | inode->i_sb->s_id, |
469 | (long long)NFS_FILEID(inode), | |
4f1abd22 | 470 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
471 | atomic_read(&inode->i_count)); |
472 | ||
473 | out: | |
474 | return inode; | |
475 | ||
476 | out_no_inode: | |
03f28e3a | 477 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
478 | goto out; |
479 | } | |
89d77c8f | 480 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 481 | |
536e43d1 | 482 | #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 |
483 | |
484 | int | |
485 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
486 | { | |
487 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
488 | struct nfs_fattr *fattr; |
489 | int error = -ENOMEM; | |
1da177e4 | 490 | |
91d5b470 CL |
491 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
492 | ||
188b95dd JL |
493 | /* skip mode change if it's just for clearing setuid/setgid */ |
494 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
495 | attr->ia_valid &= ~ATTR_MODE; | |
496 | ||
1da177e4 LT |
497 | if (attr->ia_valid & ATTR_SIZE) { |
498 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
499 | attr->ia_valid &= ~ATTR_SIZE; | |
500 | } | |
501 | ||
502 | /* Optimization: if the end result is no change, don't RPC */ | |
503 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 504 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
505 | return 0; |
506 | ||
755c1e20 | 507 | /* Write all dirty data */ |
1d59d61f TM |
508 | if (S_ISREG(inode->i_mode)) { |
509 | nfs_inode_dio_wait(inode); | |
e1552e19 | 510 | nfs_wb_all(inode); |
1d59d61f | 511 | } |
987f8dfc TM |
512 | |
513 | fattr = nfs_alloc_fattr(); | |
514 | if (fattr == NULL) | |
515 | goto out; | |
642ac549 TM |
516 | /* |
517 | * Return any delegations if we're going to change ACLs | |
518 | */ | |
519 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 520 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 521 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 522 | if (error == 0) |
aa9c2669 | 523 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
524 | nfs_free_fattr(fattr); |
525 | out: | |
65e4308d TM |
526 | return error; |
527 | } | |
ddda8e0a | 528 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 529 | |
a3d01454 TM |
530 | /** |
531 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
532 | * @inode: inode of the file used | |
533 | * @offset: file offset to start truncating | |
534 | * | |
535 | * This is a copy of the common vmtruncate, but with the locking | |
536 | * corrected to take into account the fact that NFS requires | |
537 | * inode->i_size to be updated under the inode->i_lock. | |
538 | */ | |
539 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
540 | { | |
c08d3b0e | 541 | loff_t oldsize; |
542 | int err; | |
a3d01454 | 543 | |
c08d3b0e | 544 | err = inode_newsize_ok(inode, offset); |
545 | if (err) | |
546 | goto out; | |
a3d01454 | 547 | |
c08d3b0e | 548 | spin_lock(&inode->i_lock); |
549 | oldsize = inode->i_size; | |
550 | i_size_write(inode, offset); | |
551 | spin_unlock(&inode->i_lock); | |
552 | ||
553 | truncate_pagecache(inode, oldsize, offset); | |
554 | out: | |
555 | return err; | |
a3d01454 TM |
556 | } |
557 | ||
65e4308d TM |
558 | /** |
559 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
560 | * @inode: pointer to struct inode | |
561 | * @attr: pointer to struct iattr | |
562 | * | |
563 | * Note: we do this in the *proc.c in order to ensure that | |
564 | * it works for things like exclusive creates too. | |
565 | */ | |
566 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
567 | { | |
568 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 569 | spin_lock(&inode->i_lock); |
1da177e4 | 570 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
571 | int mode = attr->ia_mode & S_IALLUGO; |
572 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
573 | inode->i_mode = mode; |
574 | } | |
575 | if ((attr->ia_valid & ATTR_UID) != 0) | |
576 | inode->i_uid = attr->ia_uid; | |
577 | if ((attr->ia_valid & ATTR_GID) != 0) | |
578 | inode->i_gid = attr->ia_gid; | |
55296809 | 579 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 580 | spin_unlock(&inode->i_lock); |
65e4308d TM |
581 | } |
582 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 583 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 584 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 585 | } |
1da177e4 | 586 | } |
ddda8e0a | 587 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 588 | |
1da177e4 LT |
589 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
590 | { | |
591 | struct inode *inode = dentry->d_inode; | |
55296809 | 592 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
593 | int err; |
594 | ||
acdc53b2 | 595 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 596 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 597 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
598 | err = filemap_write_and_wait(inode->i_mapping); |
599 | if (err) | |
600 | goto out; | |
28c494c5 | 601 | } |
fc33a7bb CH |
602 | |
603 | /* | |
604 | * We may force a getattr if the user cares about atime. | |
605 | * | |
606 | * Note that we only have to check the vfsmount flags here: | |
607 | * - NFS always sets S_NOATIME by so checking it would give a | |
608 | * bogus result | |
609 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
610 | * no point in checking those. | |
611 | */ | |
612 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
613 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 614 | need_atime = 0; |
fc33a7bb | 615 | |
1da177e4 LT |
616 | if (need_atime) |
617 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
618 | else | |
619 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 620 | if (!err) { |
1da177e4 | 621 | generic_fillattr(inode, stat); |
f43bf0be | 622 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 623 | } |
acdc53b2 | 624 | out: |
1da177e4 LT |
625 | return err; |
626 | } | |
ddda8e0a | 627 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 628 | |
f11ac8db TM |
629 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
630 | { | |
631 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
632 | l_ctx->lockowner.l_owner = current->files; |
633 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 634 | INIT_LIST_HEAD(&l_ctx->list); |
577b4232 | 635 | nfs_iocounter_init(&l_ctx->io_count); |
f11ac8db TM |
636 | } |
637 | ||
638 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
639 | { | |
8c86899f TM |
640 | struct nfs_lock_context *head = &ctx->lock_context; |
641 | struct nfs_lock_context *pos = head; | |
f11ac8db | 642 | |
8c86899f | 643 | do { |
2a369153 | 644 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 645 | continue; |
2a369153 | 646 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
647 | continue; |
648 | atomic_inc(&pos->count); | |
649 | return pos; | |
8c86899f | 650 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
651 | return NULL; |
652 | } | |
653 | ||
654 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
655 | { | |
656 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 657 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
658 | |
659 | spin_lock(&inode->i_lock); | |
660 | res = __nfs_find_lock_context(ctx); | |
661 | if (res == NULL) { | |
662 | spin_unlock(&inode->i_lock); | |
663 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
664 | if (new == NULL) | |
b3c54de6 | 665 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
666 | nfs_init_lock_context(new); |
667 | spin_lock(&inode->i_lock); | |
668 | res = __nfs_find_lock_context(ctx); | |
669 | if (res == NULL) { | |
670 | list_add_tail(&new->list, &ctx->lock_context.list); | |
671 | new->open_context = ctx; | |
672 | res = new; | |
673 | new = NULL; | |
674 | } | |
675 | } | |
676 | spin_unlock(&inode->i_lock); | |
677 | kfree(new); | |
678 | return res; | |
679 | } | |
680 | ||
681 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
682 | { | |
683 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 684 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
685 | |
686 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
687 | return; | |
688 | list_del(&l_ctx->list); | |
689 | spin_unlock(&inode->i_lock); | |
690 | kfree(l_ctx); | |
691 | } | |
692 | ||
7fe5c398 TM |
693 | /** |
694 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
695 | * @ctx: pointer to context | |
696 | * @is_sync: is this a synchronous close | |
697 | * | |
698 | * always ensure that the attributes are up to date if we're mounted | |
699 | * with close-to-open semantics | |
700 | */ | |
701 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
702 | { | |
703 | struct inode *inode; | |
704 | struct nfs_server *server; | |
705 | ||
706 | if (!(ctx->mode & FMODE_WRITE)) | |
707 | return; | |
708 | if (!is_sync) | |
709 | return; | |
3d4ff43d | 710 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
711 | if (!list_empty(&NFS_I(inode)->open_files)) |
712 | return; | |
713 | server = NFS_SERVER(inode); | |
714 | if (server->flags & NFS_MOUNT_NOCTO) | |
715 | return; | |
716 | nfs_revalidate_inode(server, inode); | |
717 | } | |
ddda8e0a | 718 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 719 | |
5ede7b1c | 720 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
721 | { |
722 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
723 | struct rpc_cred *cred = rpc_lookup_cred(); |
724 | if (IS_ERR(cred)) | |
725 | return ERR_CAST(cred); | |
1da177e4 | 726 | |
f52720ca | 727 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
728 | if (!ctx) { |
729 | put_rpccred(cred); | |
730 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 731 | } |
5ede7b1c AV |
732 | nfs_sb_active(dentry->d_sb); |
733 | ctx->dentry = dget(dentry); | |
734 | ctx->cred = cred; | |
735 | ctx->state = NULL; | |
736 | ctx->mode = f_mode; | |
737 | ctx->flags = 0; | |
738 | ctx->error = 0; | |
739 | nfs_init_lock_context(&ctx->lock_context); | |
740 | ctx->lock_context.open_context = ctx; | |
741 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 742 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
743 | return ctx; |
744 | } | |
89d77c8f | 745 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
746 | |
747 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
748 | { | |
749 | if (ctx != NULL) | |
f11ac8db | 750 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
751 | return ctx; |
752 | } | |
89d77c8f | 753 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 754 | |
7fe5c398 | 755 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 756 | { |
3d4ff43d AV |
757 | struct inode *inode = ctx->dentry->d_inode; |
758 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 759 | |
5c78f58e | 760 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
761 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
762 | return; | |
763 | list_del(&ctx->list); | |
764 | spin_unlock(&inode->i_lock); | |
ef84303e | 765 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 766 | return; |
5c78f58e TM |
767 | if (inode != NULL) |
768 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
769 | if (ctx->cred != NULL) |
770 | put_rpccred(ctx->cred); | |
3d4ff43d | 771 | dput(ctx->dentry); |
322b2b90 | 772 | nfs_sb_deactive(sb); |
82be417a | 773 | kfree(ctx->mdsthreshold); |
3bec63db TM |
774 | kfree(ctx); |
775 | } | |
776 | ||
a49c3c77 TM |
777 | void put_nfs_open_context(struct nfs_open_context *ctx) |
778 | { | |
779 | __put_nfs_open_context(ctx, 0); | |
780 | } | |
89d77c8f | 781 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 782 | |
1da177e4 LT |
783 | /* |
784 | * Ensure that mmap has a recent RPC credential for use when writing out | |
785 | * shared pages | |
786 | */ | |
c45ffdd2 | 787 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 788 | { |
c45ffdd2 | 789 | struct inode *inode = ctx->dentry->d_inode; |
1da177e4 LT |
790 | struct nfs_inode *nfsi = NFS_I(inode); |
791 | ||
1da177e4 LT |
792 | spin_lock(&inode->i_lock); |
793 | list_add(&ctx->list, &nfsi->open_files); | |
794 | spin_unlock(&inode->i_lock); | |
795 | } | |
c45ffdd2 TM |
796 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
797 | ||
798 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
799 | { | |
800 | filp->private_data = get_nfs_open_context(ctx); | |
801 | if (list_empty(&ctx->list)) | |
802 | nfs_inode_attach_open_context(ctx); | |
803 | } | |
89d77c8f | 804 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 805 | |
d530838b TM |
806 | /* |
807 | * Given an inode, search for an open context with the desired characteristics | |
808 | */ | |
dc0b027d | 809 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
810 | { |
811 | struct nfs_inode *nfsi = NFS_I(inode); | |
812 | struct nfs_open_context *pos, *ctx = NULL; | |
813 | ||
814 | spin_lock(&inode->i_lock); | |
815 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
816 | if (cred != NULL && pos->cred != cred) |
817 | continue; | |
1544fa0f TM |
818 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
819 | continue; | |
820 | ctx = get_nfs_open_context(pos); | |
821 | break; | |
1da177e4 LT |
822 | } |
823 | spin_unlock(&inode->i_lock); | |
824 | return ctx; | |
825 | } | |
826 | ||
b92dccf6 | 827 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 828 | { |
cd3758e3 | 829 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
830 | |
831 | if (ctx) { | |
c45ffdd2 TM |
832 | struct inode *inode = ctx->dentry->d_inode; |
833 | ||
1da177e4 LT |
834 | filp->private_data = NULL; |
835 | spin_lock(&inode->i_lock); | |
836 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
837 | spin_unlock(&inode->i_lock); | |
f895c53f | 838 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
839 | } |
840 | } | |
841 | ||
842 | /* | |
843 | * These allocate and release file read/write context information. | |
844 | */ | |
845 | int nfs_open(struct inode *inode, struct file *filp) | |
846 | { | |
847 | struct nfs_open_context *ctx; | |
1da177e4 | 848 | |
5ede7b1c AV |
849 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
850 | if (IS_ERR(ctx)) | |
851 | return PTR_ERR(ctx); | |
1da177e4 LT |
852 | nfs_file_set_open_context(filp, ctx); |
853 | put_nfs_open_context(ctx); | |
ef79c097 | 854 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
855 | return 0; |
856 | } | |
857 | ||
858 | int nfs_release(struct inode *inode, struct file *filp) | |
859 | { | |
1da177e4 LT |
860 | nfs_file_clear_open_context(filp); |
861 | return 0; | |
862 | } | |
863 | ||
864 | /* | |
865 | * This function is called whenever some part of NFS notices that | |
866 | * the cached attributes have to be refreshed. | |
867 | */ | |
868 | int | |
869 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
870 | { | |
871 | int status = -ESTALE; | |
1775fd3e | 872 | struct nfs4_label *label = NULL; |
a3cba2aa | 873 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 874 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
875 | |
876 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
877 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
878 | ||
85233a7a | 879 | if (is_bad_inode(inode)) |
691beb13 | 880 | goto out; |
1da177e4 | 881 | if (NFS_STALE(inode)) |
412d582e | 882 | goto out; |
7fdc49c4 | 883 | |
a3cba2aa TM |
884 | status = -ENOMEM; |
885 | fattr = nfs_alloc_fattr(); | |
886 | if (fattr == NULL) | |
887 | goto out; | |
888 | ||
691beb13 | 889 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
890 | |
891 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
892 | if (IS_ERR(label)) { | |
893 | status = PTR_ERR(label); | |
894 | goto out; | |
895 | } | |
896 | ||
1775fd3e | 897 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 LT |
898 | if (status != 0) { |
899 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
900 | inode->i_sb->s_id, | |
901 | (long long)NFS_FILEID(inode), status); | |
902 | if (status == -ESTALE) { | |
903 | nfs_zap_caches(inode); | |
904 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 905 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 906 | } |
14c43f76 | 907 | goto err_out; |
1da177e4 LT |
908 | } |
909 | ||
a3cba2aa | 910 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
911 | if (status) { |
912 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
913 | inode->i_sb->s_id, | |
914 | (long long)NFS_FILEID(inode), status); | |
14c43f76 | 915 | goto err_out; |
1da177e4 | 916 | } |
55296809 | 917 | |
24aa1fe6 | 918 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 919 | nfs_zap_acl_cache(inode); |
55296809 | 920 | |
1da177e4 LT |
921 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
922 | inode->i_sb->s_id, | |
923 | (long long)NFS_FILEID(inode)); | |
924 | ||
14c43f76 DQ |
925 | err_out: |
926 | nfs4_label_free(label); | |
927 | out: | |
a3cba2aa | 928 | nfs_free_fattr(fattr); |
1da177e4 LT |
929 | return status; |
930 | } | |
931 | ||
932 | int nfs_attribute_timeout(struct inode *inode) | |
933 | { | |
934 | struct nfs_inode *nfsi = NFS_I(inode); | |
935 | ||
d7cf8dd0 TM |
936 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
937 | } | |
938 | ||
939 | static int nfs_attribute_cache_expired(struct inode *inode) | |
940 | { | |
b4d2314b | 941 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 942 | return 0; |
d7cf8dd0 | 943 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
944 | } |
945 | ||
946 | /** | |
947 | * nfs_revalidate_inode - Revalidate the inode attributes | |
948 | * @server - pointer to nfs_server struct | |
949 | * @inode - pointer to inode struct | |
950 | * | |
951 | * Updates inode attribute information by retrieving the data from the server. | |
952 | */ | |
953 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
954 | { | |
aa9c2669 DQ |
955 | if (!(NFS_I(inode)->cache_validity & |
956 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
d7cf8dd0 | 957 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
958 | return NFS_STALE(inode) ? -ESTALE : 0; |
959 | return __nfs_revalidate_inode(server, inode); | |
960 | } | |
1c606fb7 | 961 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 962 | |
1cda707d | 963 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
964 | { |
965 | struct nfs_inode *nfsi = NFS_I(inode); | |
966 | ||
967 | if (mapping->nrpages != 0) { | |
968 | int ret = invalidate_inode_pages2(mapping); | |
969 | if (ret < 0) | |
970 | return ret; | |
971 | } | |
972 | spin_lock(&inode->i_lock); | |
973 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 974 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 975 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
976 | spin_unlock(&inode->i_lock); |
977 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
de242c0b | 978 | nfs_fscache_wait_on_invalidate(inode); |
717d44e8 TM |
979 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
980 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
981 | return 0; | |
982 | } | |
983 | ||
b4b1eadf TM |
984 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
985 | { | |
986 | if (nfs_have_delegated_attributes(inode)) | |
987 | return false; | |
988 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
989 | || nfs_attribute_timeout(inode) | |
990 | || NFS_STALE(inode); | |
991 | } | |
992 | ||
717d44e8 TM |
993 | /** |
994 | * nfs_revalidate_mapping - Revalidate the pagecache | |
995 | * @inode - pointer to host inode | |
996 | * @mapping - pointer to mapping | |
717d44e8 TM |
997 | */ |
998 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
999 | { | |
1000 | struct nfs_inode *nfsi = NFS_I(inode); | |
1001 | int ret = 0; | |
dc59250c | 1002 | |
29418aa4 MG |
1003 | /* swapfiles are not supposed to be shared. */ |
1004 | if (IS_SWAPFILE(inode)) | |
1005 | goto out; | |
1006 | ||
b4b1eadf | 1007 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1008 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1009 | if (ret < 0) | |
1010 | goto out; | |
7d52e862 | 1011 | } |
717d44e8 TM |
1012 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
1013 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 1014 | out: |
44b11874 | 1015 | return ret; |
7d52e862 TM |
1016 | } |
1017 | ||
27dc1cd3 | 1018 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1019 | { |
1020 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1021 | unsigned long ret = 0; |
a895b4a1 | 1022 | |
9e6e70f8 TM |
1023 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1024 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1025 | && inode->i_version == fattr->pre_change_attr) { |
1026 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
1027 | if (S_ISDIR(inode->i_mode)) |
1028 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 1029 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1030 | } |
a895b4a1 | 1031 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1032 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1033 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1034 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1035 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1036 | ret |= NFS_INO_INVALID_ATTR; | |
1037 | } | |
9e6e70f8 TM |
1038 | |
1039 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1040 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1041 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1042 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1043 | if (S_ISDIR(inode->i_mode)) | |
1044 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1045 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 1046 | } |
9e6e70f8 TM |
1047 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1048 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1049 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
1050 | && nfsi->npages == 0) { |
1051 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
1052 | ret |= NFS_INO_INVALID_ATTR; | |
1053 | } | |
de242c0b DH |
1054 | |
1055 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
1056 | nfs_fscache_invalidate(inode); | |
1057 | ||
27dc1cd3 | 1058 | return ret; |
a895b4a1 TM |
1059 | } |
1060 | ||
1da177e4 | 1061 | /** |
33801147 | 1062 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1063 | * @inode - pointer to inode |
1064 | * @fattr - updated attributes | |
1065 | * | |
1066 | * Verifies the attribute cache. If we have just changed the attributes, | |
1067 | * so that fattr carries weak cache consistency data, then it may | |
1068 | * also update the ctime/mtime/change_attribute. | |
1069 | */ | |
33801147 | 1070 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1071 | { |
1072 | struct nfs_inode *nfsi = NFS_I(inode); | |
1073 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1074 | unsigned long invalid = 0; |
1da177e4 | 1075 | |
dc59250c | 1076 | |
01da47bd TM |
1077 | if (nfs_have_delegated_attributes(inode)) |
1078 | return 0; | |
ca62b9c3 | 1079 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1080 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1081 | return -EIO; | |
1082 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1083 | return -EIO; |
ca62b9c3 | 1084 | |
9e6e70f8 | 1085 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 1086 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 1087 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1088 | |
1da177e4 | 1089 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1090 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1091 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1092 | |
9e6e70f8 TM |
1093 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1094 | cur_size = i_size_read(inode); | |
1095 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1096 | if (cur_size != new_isize && nfsi->npages == 0) | |
1097 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1098 | } | |
1da177e4 LT |
1099 | |
1100 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1101 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1102 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1103 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1104 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1105 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1106 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1107 | |
1108 | /* Has the link count changed? */ | |
9e6e70f8 | 1109 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1110 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1111 | |
9e6e70f8 | 1112 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1113 | invalid |= NFS_INO_INVALID_ATIME; |
1114 | ||
1115 | if (invalid != 0) | |
1116 | nfsi->cache_validity |= invalid; | |
1da177e4 | 1117 | |
33801147 | 1118 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1119 | return 0; |
1120 | } | |
1121 | ||
a10ad176 | 1122 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1123 | { |
9e6e70f8 TM |
1124 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1125 | return 0; | |
a10ad176 TM |
1126 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1127 | } | |
1128 | ||
1129 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1130 | { | |
9e6e70f8 TM |
1131 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1132 | return 0; | |
a10ad176 TM |
1133 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1134 | } | |
870a5be8 | 1135 | |
ae05f269 | 1136 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1137 | |
1138 | static unsigned long nfs_read_attr_generation_counter(void) | |
1139 | { | |
ae05f269 | 1140 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1141 | } |
1142 | ||
1143 | unsigned long nfs_inc_attr_generation_counter(void) | |
1144 | { | |
ae05f269 | 1145 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1146 | } |
1147 | ||
1148 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1149 | { | |
1150 | fattr->valid = 0; | |
1151 | fattr->time_start = jiffies; | |
1152 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1153 | fattr->owner_name = NULL; |
1154 | fattr->group_name = NULL; | |
4704f0e2 | 1155 | } |
ddda8e0a | 1156 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1157 | |
2d36bfde TM |
1158 | struct nfs_fattr *nfs_alloc_fattr(void) |
1159 | { | |
1160 | struct nfs_fattr *fattr; | |
1161 | ||
1162 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1163 | if (fattr != NULL) | |
1164 | nfs_fattr_init(fattr); | |
1165 | return fattr; | |
1166 | } | |
ddda8e0a | 1167 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1168 | |
1169 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1170 | { | |
1171 | struct nfs_fh *fh; | |
1172 | ||
1173 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1174 | if (fh != NULL) | |
1175 | fh->size = 0; | |
1176 | return fh; | |
1177 | } | |
ddda8e0a | 1178 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1179 | |
e27d359e | 1180 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1181 | /* |
1182 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1183 | * in the same way that wireshark does | |
1184 | * | |
1185 | * @fh: file handle | |
1186 | * | |
1187 | * For debugging only. | |
1188 | */ | |
1189 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1190 | { | |
1191 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1192 | * not on the result */ | |
1193 | return ~crc32(0xFFFFFFFF, &fh->data[0], fh->size); | |
1194 | } | |
1195 | ||
1196 | /* | |
20d27e92 CL |
1197 | * _nfs_display_fhandle - display an NFS file handle on the console |
1198 | * | |
1199 | * @fh: file handle to display | |
1200 | * @caption: display caption | |
1201 | * | |
1202 | * For debugging only. | |
1203 | */ | |
20d27e92 CL |
1204 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1205 | { | |
1206 | unsigned short i; | |
1207 | ||
fa68a1ba | 1208 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1209 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1210 | return; | |
1211 | } | |
1212 | ||
d8e0539e WAA |
1213 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1214 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1215 | for (i = 0; i < fh->size; i += 16) { |
1216 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1217 | ||
1218 | switch ((fh->size - i - 1) >> 2) { | |
1219 | case 0: | |
1220 | printk(KERN_DEFAULT " %08x\n", | |
1221 | be32_to_cpup(pos)); | |
1222 | break; | |
1223 | case 1: | |
1224 | printk(KERN_DEFAULT " %08x %08x\n", | |
1225 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1226 | break; | |
1227 | case 2: | |
1228 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1229 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1230 | be32_to_cpup(pos + 2)); | |
1231 | break; | |
1232 | default: | |
1233 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1234 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1235 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1236 | } | |
1237 | } | |
1238 | } | |
1239 | #endif | |
1240 | ||
a10ad176 TM |
1241 | /** |
1242 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1243 | * @inode - pointer to inode | |
1244 | * @fattr - attributes | |
1245 | * | |
1246 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1247 | * attributes got scheduled after another call carrying updated ones. | |
1248 | * | |
1249 | * To do so, the function first assumes that a more recent ctime means | |
1250 | * that the attributes in fattr are newer, however it also attempt to | |
1251 | * catch the case where ctime either didn't change, or went backwards | |
1252 | * (if someone reset the clock on the server) by looking at whether | |
1253 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1254 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1255 | * |
1256 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1257 | * more recent than the ones cached in the inode. | |
1258 | * | |
1259 | */ | |
1260 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1261 | { | |
1262 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1263 | ||
4704f0e2 | 1264 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1265 | nfs_ctime_need_update(inode, fattr) || |
1266 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1267 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1268 | } |
1269 | ||
1270 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1271 | { | |
1272 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1273 | return nfs_update_inode(inode, fattr); |
1274 | return nfs_check_inode_attributes(inode, fattr); | |
1275 | } | |
1276 | ||
33801147 TM |
1277 | /** |
1278 | * nfs_refresh_inode - try to update the inode attribute cache | |
1279 | * @inode - pointer to inode | |
1280 | * @fattr - updated attributes | |
1281 | * | |
1282 | * Check that an RPC call that returned attributes has not overlapped with | |
1283 | * other recent updates of the inode metadata, then decide whether it is | |
1284 | * safe to do a full update of the inode attributes, or whether just to | |
1285 | * call nfs_check_inode_attributes. | |
1286 | */ | |
1287 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1288 | { | |
33801147 TM |
1289 | int status; |
1290 | ||
1291 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1292 | return 0; | |
1293 | spin_lock(&inode->i_lock); | |
870a5be8 | 1294 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1295 | spin_unlock(&inode->i_lock); |
ef79c097 | 1296 | |
33801147 TM |
1297 | return status; |
1298 | } | |
ddda8e0a | 1299 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1300 | |
d65f557f TM |
1301 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1302 | { | |
1303 | struct nfs_inode *nfsi = NFS_I(inode); | |
1304 | ||
1305 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
de242c0b | 1306 | if (S_ISDIR(inode->i_mode)) { |
d65f557f | 1307 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
de242c0b DH |
1308 | nfs_fscache_invalidate(inode); |
1309 | } | |
d65f557f TM |
1310 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1311 | return 0; | |
1312 | return nfs_refresh_inode_locked(inode, fattr); | |
1313 | } | |
1314 | ||
decf491f TM |
1315 | /** |
1316 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1317 | * @inode - pointer to inode | |
1318 | * @fattr - updated attributes | |
1319 | * | |
1320 | * After an operation that has changed the inode metadata, mark the | |
1321 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1322 | * |
1323 | * NB: if the server didn't return any post op attributes, this | |
1324 | * function will force the retrieval of attributes before the next | |
1325 | * NFS request. Thus it should be used only for operations that | |
1326 | * are expected to change one or more attributes, to avoid | |
1327 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1328 | */ |
1329 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1330 | { | |
d65f557f | 1331 | int status; |
decf491f | 1332 | |
7668fdbe | 1333 | spin_lock(&inode->i_lock); |
d65f557f | 1334 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1335 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1336 | |
870a5be8 | 1337 | return status; |
decf491f | 1338 | } |
1c606fb7 | 1339 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1340 | |
70ca8852 TM |
1341 | /** |
1342 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1343 | * @inode - pointer to inode | |
1344 | * @fattr - updated attributes | |
1345 | * | |
1346 | * After an operation that has changed the inode metadata, mark the | |
1347 | * attribute cache as being invalid, then try to update it. Fake up | |
1348 | * weak cache consistency data, if none exist. | |
1349 | * | |
1350 | * This function is mainly designed to be used by the ->write_done() functions. | |
1351 | */ | |
1352 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1353 | { | |
d65f557f TM |
1354 | int status; |
1355 | ||
1356 | spin_lock(&inode->i_lock); | |
1357 | /* Don't do a WCC update if these attributes are already stale */ | |
1358 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1359 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1360 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1361 | | NFS_ATTR_FATTR_PRESIZE | |
1362 | | NFS_ATTR_FATTR_PREMTIME | |
1363 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1364 | goto out_noforce; |
1365 | } | |
9e6e70f8 TM |
1366 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1367 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1368 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1369 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1370 | } |
9e6e70f8 TM |
1371 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1372 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1373 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1374 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1375 | } | |
1376 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1377 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1378 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1379 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1380 | } | |
1381 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1382 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1383 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1384 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1385 | } |
d65f557f TM |
1386 | out_noforce: |
1387 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1388 | spin_unlock(&inode->i_lock); | |
1389 | return status; | |
70ca8852 | 1390 | } |
ddda8e0a | 1391 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1392 | |
1da177e4 LT |
1393 | /* |
1394 | * Many nfs protocol calls return the new file attributes after | |
1395 | * an operation. Here we update the inode to reflect the state | |
1396 | * of the server's inode. | |
1397 | * | |
1398 | * This is a bit tricky because we have to make sure all dirty pages | |
1399 | * have been sent off to the server before calling invalidate_inode_pages. | |
1400 | * To make sure no other process adds more write requests while we try | |
1401 | * our best to flush them, we make them sleep during the attribute refresh. | |
1402 | * | |
1403 | * A very similar scenario holds for the dir cache. | |
1404 | */ | |
24aa1fe6 | 1405 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1406 | { |
8b4bdcf8 | 1407 | struct nfs_server *server; |
1da177e4 | 1408 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1409 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1410 | unsigned long invalid = 0; |
3e7d950a | 1411 | unsigned long now = jiffies; |
62ab460c | 1412 | unsigned long save_cache_validity; |
1da177e4 | 1413 | |
4f1abd22 | 1414 | dfprintk(VFS, "NFS: %s(%s/%ld fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1415 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1416 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1417 | atomic_read(&inode->i_count), fattr->valid); |
1418 | ||
e73e6c9e MT |
1419 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1420 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1421 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1422 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1423 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1424 | (long long)fattr->fileid); | |
1425 | goto out_err; | |
1426 | } | |
1da177e4 LT |
1427 | |
1428 | /* | |
1429 | * Make sure the inode's type hasn't changed. | |
1430 | */ | |
e73e6c9e MT |
1431 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1432 | /* | |
1433 | * Big trouble! The inode has become a different object. | |
1434 | */ | |
1435 | printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n", | |
1436 | __func__, inode->i_ino, inode->i_mode, fattr->mode); | |
1437 | goto out_err; | |
1438 | } | |
1da177e4 | 1439 | |
8b4bdcf8 | 1440 | server = NFS_SERVER(inode); |
a0356862 | 1441 | /* Update the fsid? */ |
9e6e70f8 | 1442 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1443 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1444 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1445 | server->fsid = fattr->fsid; |
1446 | ||
1da177e4 LT |
1447 | /* |
1448 | * Update the read time so we don't revalidate too often. | |
1449 | */ | |
33801147 | 1450 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1451 | |
62ab460c TM |
1452 | save_cache_validity = nfsi->cache_validity; |
1453 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1454 | | NFS_INO_INVALID_ATIME | |
1455 | | NFS_INO_REVAL_FORCED | |
1456 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1457 | |
a895b4a1 | 1458 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1459 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1460 | |
47aabaa7 | 1461 | /* More cache consistency checks */ |
9e6e70f8 | 1462 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1463 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1464 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1465 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1466 | invalid |= NFS_INO_INVALID_ATTR |
1467 | | NFS_INO_INVALID_DATA | |
1468 | | NFS_INO_INVALID_ACCESS | |
1469 | | NFS_INO_INVALID_ACL | |
1470 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1471 | if (S_ISDIR(inode->i_mode)) |
1472 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1473 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1474 | } |
62ab460c TM |
1475 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1476 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1477 | |
1478 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1479 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c TM |
1480 | } else if (server->caps & NFS_CAP_MTIME) |
1481 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1482 | | NFS_INO_REVAL_FORCED); |
1483 | ||
9e6e70f8 | 1484 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1485 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c TM |
1486 | } else if (server->caps & NFS_CAP_CTIME) |
1487 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c | 1488 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1489 | |
951a143b | 1490 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1491 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1492 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1493 | cur_isize = i_size_read(inode); | |
1494 | if (new_isize != cur_isize) { | |
1495 | /* Do we perhaps have any outstanding writes, or has | |
1496 | * the file grown beyond our last write? */ | |
0f66b598 PT |
1497 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
1498 | new_isize > cur_isize) { | |
9e6e70f8 TM |
1499 | i_size_write(inode, new_isize); |
1500 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1501 | } | |
60c16ea8 HJ |
1502 | dprintk("NFS: isize change on server for file %s/%ld " |
1503 | "(%Ld to %Ld)\n", | |
1504 | inode->i_sb->s_id, | |
1505 | inode->i_ino, | |
1506 | (long long)cur_isize, | |
1507 | (long long)new_isize); | |
1da177e4 | 1508 | } |
62ab460c TM |
1509 | } else |
1510 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1511 | | NFS_INO_REVAL_PAGECACHE | |
1512 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1513 | |
1da177e4 | 1514 | |
9e6e70f8 TM |
1515 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1516 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1517 | else if (server->caps & NFS_CAP_ATIME) |
1518 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1519 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1520 | |
9e6e70f8 TM |
1521 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1522 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1523 | umode_t newmode = inode->i_mode & S_IFMT; |
1524 | newmode |= fattr->mode & S_IALLUGO; | |
1525 | inode->i_mode = newmode; | |
9e6e70f8 | 1526 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1527 | } |
62ab460c TM |
1528 | } else if (server->caps & NFS_CAP_MODE) |
1529 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1530 | | NFS_INO_INVALID_ACCESS | |
1531 | | NFS_INO_INVALID_ACL | |
1532 | | NFS_INO_REVAL_FORCED); | |
1533 | ||
9e6e70f8 | 1534 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1535 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1536 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1537 | inode->i_uid = fattr->uid; | |
1538 | } | |
62ab460c TM |
1539 | } else if (server->caps & NFS_CAP_OWNER) |
1540 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1541 | | NFS_INO_INVALID_ACCESS | |
1542 | | NFS_INO_INVALID_ACL | |
1543 | | NFS_INO_REVAL_FORCED); | |
1544 | ||
9e6e70f8 | 1545 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1546 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1547 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1548 | inode->i_gid = fattr->gid; | |
1549 | } | |
62ab460c TM |
1550 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1551 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1552 | | NFS_INO_INVALID_ACCESS | |
1553 | | NFS_INO_INVALID_ACL | |
1554 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1555 | |
9e6e70f8 TM |
1556 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1557 | if (inode->i_nlink != fattr->nlink) { | |
1558 | invalid |= NFS_INO_INVALID_ATTR; | |
1559 | if (S_ISDIR(inode->i_mode)) | |
1560 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1561 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1562 | } |
62ab460c TM |
1563 | } else if (server->caps & NFS_CAP_NLINK) |
1564 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1565 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1566 | |
9e6e70f8 | 1567 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1568 | /* |
1569 | * report the blocks in 512byte units | |
1570 | */ | |
1571 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1572 | } |
9e6e70f8 TM |
1573 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1574 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1575 | |
1576 | /* Update attrtimeo value if we're out of the unstable period */ | |
aa9c2669 | 1577 | if (invalid & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) { |
91d5b470 | 1578 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1579 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1580 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1581 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1582 | } else { |
64672d55 | 1583 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1584 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1585 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1586 | nfsi->attrtimeo_timestamp = now; | |
1587 | } | |
1da177e4 | 1588 | } |
f2115dc9 | 1589 | invalid &= ~NFS_INO_INVALID_ATTR; |
aa9c2669 | 1590 | invalid &= ~NFS_INO_INVALID_LABEL; |
1da177e4 LT |
1591 | /* Don't invalidate the data if we were to blame */ |
1592 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1593 | || S_ISLNK(inode->i_mode))) | |
1594 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1595 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1596 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1597 | nfsi->cache_validity |= invalid; |
1da177e4 | 1598 | |
de242c0b DH |
1599 | if (invalid & NFS_INO_INVALID_DATA) |
1600 | nfs_fscache_invalidate(inode); | |
1601 | ||
1da177e4 | 1602 | return 0; |
b37b03b7 | 1603 | out_err: |
1da177e4 LT |
1604 | /* |
1605 | * No need to worry about unhashing the dentry, as the | |
1606 | * lookup validation will know that the inode is bad. | |
1607 | * (But we fall through to invalidate the caches.) | |
1608 | */ | |
1609 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1610 | return -ESTALE; |
1611 | } | |
1612 | ||
f7b422b1 | 1613 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1614 | { |
1615 | struct nfs_inode *nfsi; | |
e94b1766 | 1616 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1617 | if (!nfsi) |
1618 | return NULL; | |
55296809 CL |
1619 | nfsi->flags = 0UL; |
1620 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1621 | #ifdef CONFIG_NFS_V3_ACL |
1622 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1623 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1624 | #endif | |
89d77c8f | 1625 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1626 | nfsi->nfs4_acl = NULL; |
1627 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1628 | return &nfsi->vfs_inode; |
1629 | } | |
89d77c8f | 1630 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1631 | |
fa0d7e3d | 1632 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1633 | { |
fa0d7e3d | 1634 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1635 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1636 | } | |
1637 | ||
fa0d7e3d NP |
1638 | void nfs_destroy_inode(struct inode *inode) |
1639 | { | |
1640 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1641 | } | |
89d77c8f | 1642 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1643 | |
d75d5414 AM |
1644 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1645 | { | |
89d77c8f | 1646 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1647 | INIT_LIST_HEAD(&nfsi->open_states); |
1648 | nfsi->delegation = NULL; | |
1649 | nfsi->delegation_state = 0; | |
1650 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1651 | nfsi->layout = NULL; |
d75d5414 AM |
1652 | #endif |
1653 | } | |
f7b422b1 | 1654 | |
51cc5068 | 1655 | static void init_once(void *foo) |
1da177e4 LT |
1656 | { |
1657 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1658 | ||
a35afb83 | 1659 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1660 | INIT_LIST_HEAD(&nfsi->open_files); |
1661 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1662 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1663 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1664 | nfsi->npages = 0; |
ea2cf228 | 1665 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1666 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1667 | atomic_set(&nfsi->silly_count, 1); |
1668 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1669 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1670 | nfs4_init_once(nfsi); |
1da177e4 | 1671 | } |
20c2df83 | 1672 | |
f7b422b1 | 1673 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1674 | { |
1675 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1676 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1677 | 0, (SLAB_RECLAIM_ACCOUNT| |
1678 | SLAB_MEM_SPREAD), | |
20c2df83 | 1679 | init_once); |
1da177e4 LT |
1680 | if (nfs_inode_cachep == NULL) |
1681 | return -ENOMEM; | |
1682 | ||
1683 | return 0; | |
1684 | } | |
1685 | ||
266bee88 | 1686 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1687 | { |
8c0a8537 KS |
1688 | /* |
1689 | * Make sure all delayed rcu free inodes are flushed before we | |
1690 | * destroy cache. | |
1691 | */ | |
1692 | rcu_barrier(); | |
1a1d92c1 | 1693 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1694 | } |
1695 | ||
5746006f | 1696 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1697 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1698 | |
1699 | /* | |
1700 | * start up the nfsiod workqueue | |
1701 | */ | |
1702 | static int nfsiod_start(void) | |
1703 | { | |
1704 | struct workqueue_struct *wq; | |
1705 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1706 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1707 | if (wq == NULL) |
1708 | return -ENOMEM; | |
1709 | nfsiod_workqueue = wq; | |
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | /* | |
1714 | * Destroy the nfsiod workqueue | |
1715 | */ | |
1716 | static void nfsiod_stop(void) | |
1717 | { | |
1718 | struct workqueue_struct *wq; | |
1719 | ||
1720 | wq = nfsiod_workqueue; | |
1721 | if (wq == NULL) | |
1722 | return; | |
1723 | nfsiod_workqueue = NULL; | |
1724 | destroy_workqueue(wq); | |
1725 | } | |
1726 | ||
1b340d01 | 1727 | int nfs_net_id; |
9e2e74db | 1728 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1729 | |
1730 | static int nfs_net_init(struct net *net) | |
1731 | { | |
6b13168b | 1732 | nfs_clients_init(net); |
c8d74d9b | 1733 | return 0; |
1b340d01 SK |
1734 | } |
1735 | ||
1736 | static void nfs_net_exit(struct net *net) | |
1737 | { | |
28cd1b3f | 1738 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1739 | } |
1740 | ||
1741 | static struct pernet_operations nfs_net_ops = { | |
1742 | .init = nfs_net_init, | |
1743 | .exit = nfs_net_exit, | |
1744 | .id = &nfs_net_id, | |
1745 | .size = sizeof(struct nfs_net), | |
1746 | }; | |
1747 | ||
1da177e4 LT |
1748 | /* |
1749 | * Initialize NFS | |
1750 | */ | |
1751 | static int __init init_nfs_fs(void) | |
1752 | { | |
1753 | int err; | |
1754 | ||
1b340d01 | 1755 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1756 | if (err < 0) |
89d77c8f | 1757 | goto out9; |
e571cbf1 | 1758 | |
8ec442ae DH |
1759 | err = nfs_fscache_register(); |
1760 | if (err < 0) | |
89d77c8f | 1761 | goto out8; |
8ec442ae | 1762 | |
5746006f TM |
1763 | err = nfsiod_start(); |
1764 | if (err) | |
89d77c8f | 1765 | goto out7; |
5746006f | 1766 | |
6aaca566 DH |
1767 | err = nfs_fs_proc_init(); |
1768 | if (err) | |
89d77c8f | 1769 | goto out6; |
6aaca566 | 1770 | |
1da177e4 LT |
1771 | err = nfs_init_nfspagecache(); |
1772 | if (err) | |
89d77c8f | 1773 | goto out5; |
1da177e4 LT |
1774 | |
1775 | err = nfs_init_inodecache(); | |
1776 | if (err) | |
89d77c8f | 1777 | goto out4; |
1da177e4 LT |
1778 | |
1779 | err = nfs_init_readpagecache(); | |
1780 | if (err) | |
89d77c8f | 1781 | goto out3; |
1da177e4 LT |
1782 | |
1783 | err = nfs_init_writepagecache(); | |
1784 | if (err) | |
89d77c8f | 1785 | goto out2; |
1da177e4 | 1786 | |
1da177e4 LT |
1787 | err = nfs_init_directcache(); |
1788 | if (err) | |
89d77c8f | 1789 | goto out1; |
1da177e4 LT |
1790 | |
1791 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1792 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1793 | #endif |
f7b422b1 | 1794 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1795 | goto out0; |
1796 | ||
1da177e4 | 1797 | return 0; |
129d1977 | 1798 | out0: |
1da177e4 | 1799 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1800 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1801 | #endif |
1da177e4 | 1802 | nfs_destroy_directcache(); |
89d77c8f | 1803 | out1: |
129d1977 | 1804 | nfs_destroy_writepagecache(); |
89d77c8f | 1805 | out2: |
129d1977 | 1806 | nfs_destroy_readpagecache(); |
89d77c8f | 1807 | out3: |
129d1977 | 1808 | nfs_destroy_inodecache(); |
89d77c8f | 1809 | out4: |
129d1977 | 1810 | nfs_destroy_nfspagecache(); |
89d77c8f | 1811 | out5: |
129d1977 | 1812 | nfs_fs_proc_exit(); |
89d77c8f | 1813 | out6: |
129d1977 | 1814 | nfsiod_stop(); |
89d77c8f | 1815 | out7: |
129d1977 | 1816 | nfs_fscache_unregister(); |
89d77c8f | 1817 | out8: |
129d1977 | 1818 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 1819 | out9: |
1da177e4 LT |
1820 | return err; |
1821 | } | |
1822 | ||
1823 | static void __exit exit_nfs_fs(void) | |
1824 | { | |
1da177e4 | 1825 | nfs_destroy_directcache(); |
1da177e4 LT |
1826 | nfs_destroy_writepagecache(); |
1827 | nfs_destroy_readpagecache(); | |
1828 | nfs_destroy_inodecache(); | |
1829 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1830 | nfs_fscache_unregister(); |
1b340d01 | 1831 | unregister_pernet_subsys(&nfs_net_ops); |
1da177e4 | 1832 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1833 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1834 | #endif |
f7b422b1 | 1835 | unregister_nfs_fs(); |
6aaca566 | 1836 | nfs_fs_proc_exit(); |
5746006f | 1837 | nfsiod_stop(); |
1da177e4 LT |
1838 | } |
1839 | ||
1840 | /* Not quite true; I just maintain it */ | |
1841 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1842 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1843 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1844 | |
1845 | module_init(init_nfs_fs) | |
1846 | module_exit(exit_nfs_fs) |