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 | ||
277 | if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL) == 0) | |
278 | return; | |
279 | ||
280 | if (NFS_SERVER(inode)->nfs_client->cl_minorversion < 2) | |
281 | return; | |
282 | ||
283 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { | |
284 | error = security_inode_notifysecctx(inode, label->label, | |
285 | label->len); | |
286 | if (error) | |
287 | printk(KERN_ERR "%s() %s %d " | |
288 | "security_inode_notifysecctx() %d\n", | |
289 | __func__, | |
290 | (char *)label->label, | |
291 | label->len, error); | |
292 | } | |
293 | } | |
294 | ||
e058f70b SD |
295 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
296 | { | |
297 | struct nfs4_label *label = NULL; | |
298 | int minor_version = server->nfs_client->cl_minorversion; | |
299 | ||
300 | if (minor_version < 2) | |
301 | return label; | |
302 | ||
303 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
304 | return label; | |
305 | ||
306 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
307 | if (label == NULL) | |
308 | return ERR_PTR(-ENOMEM); | |
309 | ||
310 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
311 | if (label->label == NULL) { | |
312 | kfree(label); | |
313 | return ERR_PTR(-ENOMEM); | |
314 | } | |
315 | label->len = NFS4_MAXLABELLEN; | |
316 | ||
317 | return label; | |
318 | } | |
319 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 DQ |
320 | #else |
321 | void inline nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, | |
322 | struct nfs4_label *label) | |
323 | { | |
324 | } | |
e058f70b | 325 | #endif |
aa9c2669 | 326 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 327 | |
1da177e4 LT |
328 | /* |
329 | * This is our front-end to iget that looks up inodes by file handle | |
330 | * instead of inode number. | |
331 | */ | |
332 | struct inode * | |
1775fd3e | 333 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
334 | { |
335 | struct nfs_find_desc desc = { | |
336 | .fh = fh, | |
337 | .fattr = fattr | |
338 | }; | |
03f28e3a | 339 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
340 | unsigned long hash; |
341 | ||
7ebb9315 BS |
342 | nfs_attr_check_mountpoint(sb, fattr); |
343 | ||
533eb461 AA |
344 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
345 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 346 | goto out_no_inode; |
9e6e70f8 | 347 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 348 | goto out_no_inode; |
1da177e4 LT |
349 | |
350 | hash = nfs_fattr_to_ino_t(fattr); | |
351 | ||
03f28e3a TM |
352 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
353 | if (inode == NULL) { | |
354 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 355 | goto out_no_inode; |
03f28e3a | 356 | } |
1da177e4 LT |
357 | |
358 | if (inode->i_state & I_NEW) { | |
359 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 360 | unsigned long now = jiffies; |
1da177e4 LT |
361 | |
362 | /* We set i_ino for the few things that still rely on it, | |
363 | * such as stat(2) */ | |
364 | inode->i_ino = hash; | |
365 | ||
366 | /* We can't support update_atime(), since the server will reset it */ | |
367 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
368 | inode->i_mode = fattr->mode; | |
62ab460c TM |
369 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
370 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
4124bbc5 | 371 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
372 | /* Why so? Because we want revalidate for devices/FIFOs, and |
373 | * that's precisely what we have in nfs_file_inode_operations. | |
374 | */ | |
8fa5c000 | 375 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 376 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 377 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
378 | inode->i_data.a_ops = &nfs_file_aops; |
379 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
380 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 381 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 382 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 383 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 384 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
385 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
386 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
387 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
388 | inode->i_op = &nfs_referral_inode_operations; | |
389 | else | |
390 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 391 | inode->i_fop = NULL; |
36d43a43 | 392 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 393 | } |
1da177e4 LT |
394 | } else if (S_ISLNK(inode->i_mode)) |
395 | inode->i_op = &nfs_symlink_inode_operations; | |
396 | else | |
397 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
398 | ||
9e6e70f8 TM |
399 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
400 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
401 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 402 | inode->i_version = 0; |
9e6e70f8 | 403 | inode->i_size = 0; |
6d6b77f1 | 404 | clear_nlink(inode); |
9ff593c4 EB |
405 | inode->i_uid = make_kuid(&init_user_ns, -2); |
406 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
407 | inode->i_blocks = 0; |
408 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
409 | nfsi->write_io = 0; |
410 | nfsi->read_io = 0; | |
9e6e70f8 | 411 | |
33801147 | 412 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 413 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
414 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
415 | inode->i_atime = fattr->atime; | |
62ab460c TM |
416 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
417 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
418 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
419 | inode->i_mtime = fattr->mtime; | |
62ab460c | 420 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
4124bbc5 | 421 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
422 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
423 | inode->i_ctime = fattr->ctime; | |
62ab460c | 424 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
4124bbc5 | 425 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 | 426 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 427 | inode->i_version = fattr->change_attr; |
62ab460c | 428 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
4124bbc5 | 429 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
430 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
431 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
432 | else |
433 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
62ab460c | 434 | | NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 435 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 436 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
437 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
438 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
439 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
440 | inode->i_uid = fattr->uid; | |
62ab460c | 441 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
4124bbc5 | 442 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
443 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
444 | inode->i_gid = fattr->gid; | |
62ab460c | 445 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
4124bbc5 | 446 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
447 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
448 | inode->i_blocks = fattr->du.nfs2.blocks; | |
449 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
450 | /* |
451 | * report the blocks in 512byte units | |
452 | */ | |
453 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 454 | } |
aa9c2669 DQ |
455 | |
456 | nfs_setsecurity(inode, fattr, label); | |
457 | ||
1da177e4 | 458 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 459 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 460 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 461 | |
f1fe29b4 | 462 | nfs_fscache_init_inode(inode); |
ef79c097 | 463 | |
1da177e4 LT |
464 | unlock_new_inode(inode); |
465 | } else | |
466 | nfs_refresh_inode(inode, fattr); | |
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 | ||
f4ce1299 TM |
507 | trace_nfs_setattr_enter(inode); |
508 | ||
755c1e20 | 509 | /* Write all dirty data */ |
1d59d61f TM |
510 | if (S_ISREG(inode->i_mode)) { |
511 | nfs_inode_dio_wait(inode); | |
e1552e19 | 512 | nfs_wb_all(inode); |
1d59d61f | 513 | } |
987f8dfc TM |
514 | |
515 | fattr = nfs_alloc_fattr(); | |
516 | if (fattr == NULL) | |
517 | goto out; | |
642ac549 TM |
518 | /* |
519 | * Return any delegations if we're going to change ACLs | |
520 | */ | |
521 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 522 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 523 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 524 | if (error == 0) |
aa9c2669 | 525 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
526 | nfs_free_fattr(fattr); |
527 | out: | |
f4ce1299 | 528 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
529 | return error; |
530 | } | |
ddda8e0a | 531 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 532 | |
a3d01454 TM |
533 | /** |
534 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
535 | * @inode: inode of the file used | |
536 | * @offset: file offset to start truncating | |
537 | * | |
538 | * This is a copy of the common vmtruncate, but with the locking | |
539 | * corrected to take into account the fact that NFS requires | |
540 | * inode->i_size to be updated under the inode->i_lock. | |
541 | */ | |
542 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
543 | { | |
c08d3b0e | 544 | int err; |
a3d01454 | 545 | |
c08d3b0e | 546 | err = inode_newsize_ok(inode, offset); |
547 | if (err) | |
548 | goto out; | |
a3d01454 | 549 | |
c08d3b0e | 550 | spin_lock(&inode->i_lock); |
c08d3b0e | 551 | i_size_write(inode, offset); |
552 | spin_unlock(&inode->i_lock); | |
553 | ||
7caef267 | 554 | truncate_pagecache(inode, offset); |
c08d3b0e | 555 | out: |
556 | return err; | |
a3d01454 TM |
557 | } |
558 | ||
65e4308d TM |
559 | /** |
560 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
561 | * @inode: pointer to struct inode | |
562 | * @attr: pointer to struct iattr | |
563 | * | |
564 | * Note: we do this in the *proc.c in order to ensure that | |
565 | * it works for things like exclusive creates too. | |
566 | */ | |
567 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
568 | { | |
569 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 570 | spin_lock(&inode->i_lock); |
1da177e4 | 571 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
572 | int mode = attr->ia_mode & S_IALLUGO; |
573 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
574 | inode->i_mode = mode; |
575 | } | |
576 | if ((attr->ia_valid & ATTR_UID) != 0) | |
577 | inode->i_uid = attr->ia_uid; | |
578 | if ((attr->ia_valid & ATTR_GID) != 0) | |
579 | inode->i_gid = attr->ia_gid; | |
55296809 | 580 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 581 | spin_unlock(&inode->i_lock); |
65e4308d TM |
582 | } |
583 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 584 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 585 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 586 | } |
1da177e4 | 587 | } |
ddda8e0a | 588 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 589 | |
1da177e4 LT |
590 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
591 | { | |
592 | struct inode *inode = dentry->d_inode; | |
55296809 | 593 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
594 | int err; |
595 | ||
f4ce1299 | 596 | trace_nfs_getattr_enter(inode); |
acdc53b2 | 597 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 598 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 599 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
600 | err = filemap_write_and_wait(inode->i_mapping); |
601 | if (err) | |
602 | goto out; | |
28c494c5 | 603 | } |
fc33a7bb CH |
604 | |
605 | /* | |
606 | * We may force a getattr if the user cares about atime. | |
607 | * | |
608 | * Note that we only have to check the vfsmount flags here: | |
609 | * - NFS always sets S_NOATIME by so checking it would give a | |
610 | * bogus result | |
611 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
612 | * no point in checking those. | |
613 | */ | |
614 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
615 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 616 | need_atime = 0; |
fc33a7bb | 617 | |
1da177e4 LT |
618 | if (need_atime) |
619 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
620 | else | |
621 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 622 | if (!err) { |
1da177e4 | 623 | generic_fillattr(inode, stat); |
f43bf0be | 624 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 625 | } |
acdc53b2 | 626 | out: |
f4ce1299 | 627 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
628 | return err; |
629 | } | |
ddda8e0a | 630 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 631 | |
f11ac8db TM |
632 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
633 | { | |
634 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
635 | l_ctx->lockowner.l_owner = current->files; |
636 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 637 | INIT_LIST_HEAD(&l_ctx->list); |
577b4232 | 638 | nfs_iocounter_init(&l_ctx->io_count); |
f11ac8db TM |
639 | } |
640 | ||
641 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
642 | { | |
8c86899f TM |
643 | struct nfs_lock_context *head = &ctx->lock_context; |
644 | struct nfs_lock_context *pos = head; | |
f11ac8db | 645 | |
8c86899f | 646 | do { |
2a369153 | 647 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 648 | continue; |
2a369153 | 649 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
650 | continue; |
651 | atomic_inc(&pos->count); | |
652 | return pos; | |
8c86899f | 653 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
654 | return NULL; |
655 | } | |
656 | ||
657 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
658 | { | |
659 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 660 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
661 | |
662 | spin_lock(&inode->i_lock); | |
663 | res = __nfs_find_lock_context(ctx); | |
664 | if (res == NULL) { | |
665 | spin_unlock(&inode->i_lock); | |
666 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
667 | if (new == NULL) | |
b3c54de6 | 668 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
669 | nfs_init_lock_context(new); |
670 | spin_lock(&inode->i_lock); | |
671 | res = __nfs_find_lock_context(ctx); | |
672 | if (res == NULL) { | |
673 | list_add_tail(&new->list, &ctx->lock_context.list); | |
674 | new->open_context = ctx; | |
675 | res = new; | |
676 | new = NULL; | |
677 | } | |
678 | } | |
679 | spin_unlock(&inode->i_lock); | |
680 | kfree(new); | |
681 | return res; | |
682 | } | |
683 | ||
684 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
685 | { | |
686 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 687 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
688 | |
689 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
690 | return; | |
691 | list_del(&l_ctx->list); | |
692 | spin_unlock(&inode->i_lock); | |
693 | kfree(l_ctx); | |
694 | } | |
695 | ||
7fe5c398 TM |
696 | /** |
697 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
698 | * @ctx: pointer to context | |
699 | * @is_sync: is this a synchronous close | |
700 | * | |
701 | * always ensure that the attributes are up to date if we're mounted | |
702 | * with close-to-open semantics | |
703 | */ | |
704 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
705 | { | |
706 | struct inode *inode; | |
707 | struct nfs_server *server; | |
708 | ||
709 | if (!(ctx->mode & FMODE_WRITE)) | |
710 | return; | |
711 | if (!is_sync) | |
712 | return; | |
3d4ff43d | 713 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
714 | if (!list_empty(&NFS_I(inode)->open_files)) |
715 | return; | |
716 | server = NFS_SERVER(inode); | |
717 | if (server->flags & NFS_MOUNT_NOCTO) | |
718 | return; | |
719 | nfs_revalidate_inode(server, inode); | |
720 | } | |
ddda8e0a | 721 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 722 | |
5ede7b1c | 723 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
724 | { |
725 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
726 | struct rpc_cred *cred = rpc_lookup_cred(); |
727 | if (IS_ERR(cred)) | |
728 | return ERR_CAST(cred); | |
1da177e4 | 729 | |
f52720ca | 730 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
731 | if (!ctx) { |
732 | put_rpccred(cred); | |
733 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 734 | } |
5ede7b1c AV |
735 | nfs_sb_active(dentry->d_sb); |
736 | ctx->dentry = dget(dentry); | |
737 | ctx->cred = cred; | |
738 | ctx->state = NULL; | |
739 | ctx->mode = f_mode; | |
740 | ctx->flags = 0; | |
741 | ctx->error = 0; | |
742 | nfs_init_lock_context(&ctx->lock_context); | |
743 | ctx->lock_context.open_context = ctx; | |
744 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 745 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
746 | return ctx; |
747 | } | |
89d77c8f | 748 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
749 | |
750 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
751 | { | |
752 | if (ctx != NULL) | |
f11ac8db | 753 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
754 | return ctx; |
755 | } | |
89d77c8f | 756 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 757 | |
7fe5c398 | 758 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 759 | { |
3d4ff43d AV |
760 | struct inode *inode = ctx->dentry->d_inode; |
761 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 762 | |
5c78f58e | 763 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
764 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
765 | return; | |
766 | list_del(&ctx->list); | |
767 | spin_unlock(&inode->i_lock); | |
ef84303e | 768 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 769 | return; |
5c78f58e TM |
770 | if (inode != NULL) |
771 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
772 | if (ctx->cred != NULL) |
773 | put_rpccred(ctx->cred); | |
3d4ff43d | 774 | dput(ctx->dentry); |
322b2b90 | 775 | nfs_sb_deactive(sb); |
82be417a | 776 | kfree(ctx->mdsthreshold); |
3bec63db TM |
777 | kfree(ctx); |
778 | } | |
779 | ||
a49c3c77 TM |
780 | void put_nfs_open_context(struct nfs_open_context *ctx) |
781 | { | |
782 | __put_nfs_open_context(ctx, 0); | |
783 | } | |
89d77c8f | 784 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 785 | |
1da177e4 LT |
786 | /* |
787 | * Ensure that mmap has a recent RPC credential for use when writing out | |
788 | * shared pages | |
789 | */ | |
c45ffdd2 | 790 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 791 | { |
c45ffdd2 | 792 | struct inode *inode = ctx->dentry->d_inode; |
1da177e4 LT |
793 | struct nfs_inode *nfsi = NFS_I(inode); |
794 | ||
1da177e4 LT |
795 | spin_lock(&inode->i_lock); |
796 | list_add(&ctx->list, &nfsi->open_files); | |
797 | spin_unlock(&inode->i_lock); | |
798 | } | |
c45ffdd2 TM |
799 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
800 | ||
801 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
802 | { | |
803 | filp->private_data = get_nfs_open_context(ctx); | |
804 | if (list_empty(&ctx->list)) | |
805 | nfs_inode_attach_open_context(ctx); | |
806 | } | |
89d77c8f | 807 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 808 | |
d530838b TM |
809 | /* |
810 | * Given an inode, search for an open context with the desired characteristics | |
811 | */ | |
dc0b027d | 812 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
813 | { |
814 | struct nfs_inode *nfsi = NFS_I(inode); | |
815 | struct nfs_open_context *pos, *ctx = NULL; | |
816 | ||
817 | spin_lock(&inode->i_lock); | |
818 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
819 | if (cred != NULL && pos->cred != cred) |
820 | continue; | |
1544fa0f TM |
821 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
822 | continue; | |
823 | ctx = get_nfs_open_context(pos); | |
824 | break; | |
1da177e4 LT |
825 | } |
826 | spin_unlock(&inode->i_lock); | |
827 | return ctx; | |
828 | } | |
829 | ||
b92dccf6 | 830 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 831 | { |
cd3758e3 | 832 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
833 | |
834 | if (ctx) { | |
c45ffdd2 TM |
835 | struct inode *inode = ctx->dentry->d_inode; |
836 | ||
1da177e4 LT |
837 | filp->private_data = NULL; |
838 | spin_lock(&inode->i_lock); | |
839 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
840 | spin_unlock(&inode->i_lock); | |
f895c53f | 841 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
842 | } |
843 | } | |
844 | ||
845 | /* | |
846 | * These allocate and release file read/write context information. | |
847 | */ | |
848 | int nfs_open(struct inode *inode, struct file *filp) | |
849 | { | |
850 | struct nfs_open_context *ctx; | |
1da177e4 | 851 | |
5ede7b1c AV |
852 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
853 | if (IS_ERR(ctx)) | |
854 | return PTR_ERR(ctx); | |
1da177e4 LT |
855 | nfs_file_set_open_context(filp, ctx); |
856 | put_nfs_open_context(ctx); | |
f1fe29b4 | 857 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
858 | return 0; |
859 | } | |
860 | ||
861 | int nfs_release(struct inode *inode, struct file *filp) | |
862 | { | |
1da177e4 LT |
863 | nfs_file_clear_open_context(filp); |
864 | return 0; | |
865 | } | |
866 | ||
867 | /* | |
868 | * This function is called whenever some part of NFS notices that | |
869 | * the cached attributes have to be refreshed. | |
870 | */ | |
871 | int | |
872 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
873 | { | |
874 | int status = -ESTALE; | |
1775fd3e | 875 | struct nfs4_label *label = NULL; |
a3cba2aa | 876 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 877 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
878 | |
879 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
880 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
881 | ||
f4ce1299 TM |
882 | trace_nfs_revalidate_inode_enter(inode); |
883 | ||
85233a7a | 884 | if (is_bad_inode(inode)) |
691beb13 | 885 | goto out; |
1da177e4 | 886 | if (NFS_STALE(inode)) |
412d582e | 887 | goto out; |
7fdc49c4 | 888 | |
a3cba2aa TM |
889 | status = -ENOMEM; |
890 | fattr = nfs_alloc_fattr(); | |
891 | if (fattr == NULL) | |
892 | goto out; | |
893 | ||
691beb13 | 894 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
895 | |
896 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
897 | if (IS_ERR(label)) { | |
898 | status = PTR_ERR(label); | |
899 | goto out; | |
900 | } | |
901 | ||
1775fd3e | 902 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 LT |
903 | if (status != 0) { |
904 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
905 | inode->i_sb->s_id, | |
906 | (long long)NFS_FILEID(inode), status); | |
907 | if (status == -ESTALE) { | |
908 | nfs_zap_caches(inode); | |
909 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 910 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 911 | } |
14c43f76 | 912 | goto err_out; |
1da177e4 LT |
913 | } |
914 | ||
a3cba2aa | 915 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
916 | if (status) { |
917 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
918 | inode->i_sb->s_id, | |
919 | (long long)NFS_FILEID(inode), status); | |
14c43f76 | 920 | goto err_out; |
1da177e4 | 921 | } |
55296809 | 922 | |
24aa1fe6 | 923 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 924 | nfs_zap_acl_cache(inode); |
55296809 | 925 | |
1da177e4 LT |
926 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
927 | inode->i_sb->s_id, | |
928 | (long long)NFS_FILEID(inode)); | |
929 | ||
14c43f76 DQ |
930 | err_out: |
931 | nfs4_label_free(label); | |
932 | out: | |
a3cba2aa | 933 | nfs_free_fattr(fattr); |
f4ce1299 | 934 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
935 | return status; |
936 | } | |
937 | ||
938 | int nfs_attribute_timeout(struct inode *inode) | |
939 | { | |
940 | struct nfs_inode *nfsi = NFS_I(inode); | |
941 | ||
d7cf8dd0 TM |
942 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
943 | } | |
944 | ||
43f291cd | 945 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 946 | { |
b4d2314b | 947 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 948 | return 0; |
d7cf8dd0 | 949 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
950 | } |
951 | ||
952 | /** | |
953 | * nfs_revalidate_inode - Revalidate the inode attributes | |
954 | * @server - pointer to nfs_server struct | |
955 | * @inode - pointer to inode struct | |
956 | * | |
957 | * Updates inode attribute information by retrieving the data from the server. | |
958 | */ | |
959 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
960 | { | |
aa9c2669 DQ |
961 | if (!(NFS_I(inode)->cache_validity & |
962 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
d7cf8dd0 | 963 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
964 | return NFS_STALE(inode) ? -ESTALE : 0; |
965 | return __nfs_revalidate_inode(server, inode); | |
966 | } | |
1c606fb7 | 967 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 968 | |
1cda707d | 969 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
970 | { |
971 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
972 | int ret; |
973 | ||
717d44e8 | 974 | if (mapping->nrpages != 0) { |
f8806c84 TM |
975 | if (S_ISREG(inode->i_mode)) { |
976 | ret = nfs_sync_mapping(mapping); | |
977 | if (ret < 0) | |
978 | return ret; | |
979 | } | |
980 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
981 | if (ret < 0) |
982 | return ret; | |
983 | } | |
984 | spin_lock(&inode->i_lock); | |
985 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 986 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 987 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
988 | spin_unlock(&inode->i_lock); |
989 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
de242c0b | 990 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 991 | |
717d44e8 TM |
992 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
993 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
994 | return 0; | |
995 | } | |
996 | ||
b4b1eadf TM |
997 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
998 | { | |
999 | if (nfs_have_delegated_attributes(inode)) | |
1000 | return false; | |
1001 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
1002 | || nfs_attribute_timeout(inode) | |
1003 | || NFS_STALE(inode); | |
1004 | } | |
1005 | ||
717d44e8 TM |
1006 | /** |
1007 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1008 | * @inode - pointer to host inode | |
1009 | * @mapping - pointer to mapping | |
717d44e8 TM |
1010 | */ |
1011 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1012 | { | |
1013 | struct nfs_inode *nfsi = NFS_I(inode); | |
1014 | int ret = 0; | |
dc59250c | 1015 | |
29418aa4 MG |
1016 | /* swapfiles are not supposed to be shared. */ |
1017 | if (IS_SWAPFILE(inode)) | |
1018 | goto out; | |
1019 | ||
b4b1eadf | 1020 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1021 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1022 | if (ret < 0) | |
1023 | goto out; | |
7d52e862 | 1024 | } |
f4ce1299 TM |
1025 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { |
1026 | trace_nfs_invalidate_mapping_enter(inode); | |
717d44e8 | 1027 | ret = nfs_invalidate_mapping(inode, mapping); |
f4ce1299 TM |
1028 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1029 | } | |
1030 | ||
cd9ae2b6 | 1031 | out: |
44b11874 | 1032 | return ret; |
7d52e862 TM |
1033 | } |
1034 | ||
27dc1cd3 | 1035 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1036 | { |
1037 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1038 | unsigned long ret = 0; |
a895b4a1 | 1039 | |
9e6e70f8 TM |
1040 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1041 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1042 | && inode->i_version == fattr->pre_change_attr) { |
1043 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
1044 | if (S_ISDIR(inode->i_mode)) |
1045 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 1046 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1047 | } |
a895b4a1 | 1048 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1049 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1050 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1051 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1052 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1053 | ret |= NFS_INO_INVALID_ATTR; | |
1054 | } | |
9e6e70f8 TM |
1055 | |
1056 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1057 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1058 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1059 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1060 | if (S_ISDIR(inode->i_mode)) | |
1061 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1062 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 1063 | } |
9e6e70f8 TM |
1064 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1065 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1066 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
1067 | && nfsi->npages == 0) { |
1068 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
1069 | ret |= NFS_INO_INVALID_ATTR; | |
1070 | } | |
de242c0b DH |
1071 | |
1072 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
1073 | nfs_fscache_invalidate(inode); | |
1074 | ||
27dc1cd3 | 1075 | return ret; |
a895b4a1 TM |
1076 | } |
1077 | ||
1da177e4 | 1078 | /** |
33801147 | 1079 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1080 | * @inode - pointer to inode |
1081 | * @fattr - updated attributes | |
1082 | * | |
1083 | * Verifies the attribute cache. If we have just changed the attributes, | |
1084 | * so that fattr carries weak cache consistency data, then it may | |
1085 | * also update the ctime/mtime/change_attribute. | |
1086 | */ | |
33801147 | 1087 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1088 | { |
1089 | struct nfs_inode *nfsi = NFS_I(inode); | |
1090 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1091 | unsigned long invalid = 0; |
1da177e4 | 1092 | |
dc59250c | 1093 | |
01da47bd TM |
1094 | if (nfs_have_delegated_attributes(inode)) |
1095 | return 0; | |
ca62b9c3 | 1096 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1097 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1098 | return -EIO; | |
1099 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1100 | return -EIO; |
ca62b9c3 | 1101 | |
9e6e70f8 | 1102 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 1103 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 1104 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1105 | |
1da177e4 | 1106 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1107 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1108 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1109 | |
9e6e70f8 TM |
1110 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1111 | cur_size = i_size_read(inode); | |
1112 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1113 | if (cur_size != new_isize && nfsi->npages == 0) | |
1114 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1115 | } | |
1da177e4 LT |
1116 | |
1117 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1118 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1119 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1120 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1121 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1122 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1123 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1124 | |
1125 | /* Has the link count changed? */ | |
9e6e70f8 | 1126 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1127 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1128 | |
9e6e70f8 | 1129 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1130 | invalid |= NFS_INO_INVALID_ATIME; |
1131 | ||
1132 | if (invalid != 0) | |
1133 | nfsi->cache_validity |= invalid; | |
1da177e4 | 1134 | |
33801147 | 1135 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1136 | return 0; |
1137 | } | |
1138 | ||
a10ad176 | 1139 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1140 | { |
9e6e70f8 TM |
1141 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1142 | return 0; | |
a10ad176 TM |
1143 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1144 | } | |
1145 | ||
1146 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1147 | { | |
9e6e70f8 TM |
1148 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1149 | return 0; | |
a10ad176 TM |
1150 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1151 | } | |
870a5be8 | 1152 | |
ae05f269 | 1153 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1154 | |
1155 | static unsigned long nfs_read_attr_generation_counter(void) | |
1156 | { | |
ae05f269 | 1157 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1158 | } |
1159 | ||
1160 | unsigned long nfs_inc_attr_generation_counter(void) | |
1161 | { | |
ae05f269 | 1162 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1163 | } |
1164 | ||
1165 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1166 | { | |
1167 | fattr->valid = 0; | |
1168 | fattr->time_start = jiffies; | |
1169 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1170 | fattr->owner_name = NULL; |
1171 | fattr->group_name = NULL; | |
4704f0e2 | 1172 | } |
ddda8e0a | 1173 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1174 | |
2d36bfde TM |
1175 | struct nfs_fattr *nfs_alloc_fattr(void) |
1176 | { | |
1177 | struct nfs_fattr *fattr; | |
1178 | ||
1179 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1180 | if (fattr != NULL) | |
1181 | nfs_fattr_init(fattr); | |
1182 | return fattr; | |
1183 | } | |
ddda8e0a | 1184 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1185 | |
1186 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1187 | { | |
1188 | struct nfs_fh *fh; | |
1189 | ||
1190 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1191 | if (fh != NULL) | |
1192 | fh->size = 0; | |
1193 | return fh; | |
1194 | } | |
ddda8e0a | 1195 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1196 | |
e27d359e | 1197 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1198 | /* |
1199 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1200 | * in the same way that wireshark does | |
1201 | * | |
1202 | * @fh: file handle | |
1203 | * | |
1204 | * For debugging only. | |
1205 | */ | |
1206 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1207 | { | |
1208 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1209 | * not on the result */ | |
1264a2f0 | 1210 | return nfs_fhandle_hash(fh); |
d8e0539e | 1211 | } |
9e6ee76d | 1212 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1213 | |
1214 | /* | |
20d27e92 CL |
1215 | * _nfs_display_fhandle - display an NFS file handle on the console |
1216 | * | |
1217 | * @fh: file handle to display | |
1218 | * @caption: display caption | |
1219 | * | |
1220 | * For debugging only. | |
1221 | */ | |
20d27e92 CL |
1222 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1223 | { | |
1224 | unsigned short i; | |
1225 | ||
fa68a1ba | 1226 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1227 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1228 | return; | |
1229 | } | |
1230 | ||
d8e0539e WAA |
1231 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1232 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1233 | for (i = 0; i < fh->size; i += 16) { |
1234 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1235 | ||
1236 | switch ((fh->size - i - 1) >> 2) { | |
1237 | case 0: | |
1238 | printk(KERN_DEFAULT " %08x\n", | |
1239 | be32_to_cpup(pos)); | |
1240 | break; | |
1241 | case 1: | |
1242 | printk(KERN_DEFAULT " %08x %08x\n", | |
1243 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1244 | break; | |
1245 | case 2: | |
1246 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1247 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1248 | be32_to_cpup(pos + 2)); | |
1249 | break; | |
1250 | default: | |
1251 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1252 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1253 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1254 | } | |
1255 | } | |
1256 | } | |
9e6ee76d | 1257 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1258 | #endif |
1259 | ||
a10ad176 TM |
1260 | /** |
1261 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1262 | * @inode - pointer to inode | |
1263 | * @fattr - attributes | |
1264 | * | |
1265 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1266 | * attributes got scheduled after another call carrying updated ones. | |
1267 | * | |
1268 | * To do so, the function first assumes that a more recent ctime means | |
1269 | * that the attributes in fattr are newer, however it also attempt to | |
1270 | * catch the case where ctime either didn't change, or went backwards | |
1271 | * (if someone reset the clock on the server) by looking at whether | |
1272 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1273 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1274 | * |
1275 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1276 | * more recent than the ones cached in the inode. | |
1277 | * | |
1278 | */ | |
1279 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1280 | { | |
1281 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1282 | ||
4704f0e2 | 1283 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1284 | nfs_ctime_need_update(inode, fattr) || |
1285 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1286 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1287 | } |
1288 | ||
1289 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1290 | { | |
f4ce1299 TM |
1291 | int ret; |
1292 | ||
1293 | trace_nfs_refresh_inode_enter(inode); | |
1294 | ||
a10ad176 | 1295 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1296 | ret = nfs_update_inode(inode, fattr); |
1297 | else | |
1298 | ret = nfs_check_inode_attributes(inode, fattr); | |
1299 | ||
1300 | trace_nfs_refresh_inode_exit(inode, ret); | |
1301 | return ret; | |
870a5be8 TM |
1302 | } |
1303 | ||
33801147 TM |
1304 | /** |
1305 | * nfs_refresh_inode - try to update the inode attribute cache | |
1306 | * @inode - pointer to inode | |
1307 | * @fattr - updated attributes | |
1308 | * | |
1309 | * Check that an RPC call that returned attributes has not overlapped with | |
1310 | * other recent updates of the inode metadata, then decide whether it is | |
1311 | * safe to do a full update of the inode attributes, or whether just to | |
1312 | * call nfs_check_inode_attributes. | |
1313 | */ | |
1314 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1315 | { | |
33801147 TM |
1316 | int status; |
1317 | ||
1318 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1319 | return 0; | |
1320 | spin_lock(&inode->i_lock); | |
870a5be8 | 1321 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1322 | spin_unlock(&inode->i_lock); |
ef79c097 | 1323 | |
33801147 TM |
1324 | return status; |
1325 | } | |
ddda8e0a | 1326 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1327 | |
d65f557f TM |
1328 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1329 | { | |
1330 | struct nfs_inode *nfsi = NFS_I(inode); | |
1331 | ||
1332 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
de242c0b | 1333 | if (S_ISDIR(inode->i_mode)) { |
d65f557f | 1334 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
de242c0b DH |
1335 | nfs_fscache_invalidate(inode); |
1336 | } | |
d65f557f TM |
1337 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1338 | return 0; | |
1339 | return nfs_refresh_inode_locked(inode, fattr); | |
1340 | } | |
1341 | ||
decf491f TM |
1342 | /** |
1343 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1344 | * @inode - pointer to inode | |
1345 | * @fattr - updated attributes | |
1346 | * | |
1347 | * After an operation that has changed the inode metadata, mark the | |
1348 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1349 | * |
1350 | * NB: if the server didn't return any post op attributes, this | |
1351 | * function will force the retrieval of attributes before the next | |
1352 | * NFS request. Thus it should be used only for operations that | |
1353 | * are expected to change one or more attributes, to avoid | |
1354 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1355 | */ |
1356 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1357 | { | |
d65f557f | 1358 | int status; |
decf491f | 1359 | |
7668fdbe | 1360 | spin_lock(&inode->i_lock); |
d65f557f | 1361 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1362 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1363 | |
870a5be8 | 1364 | return status; |
decf491f | 1365 | } |
1c606fb7 | 1366 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1367 | |
70ca8852 TM |
1368 | /** |
1369 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1370 | * @inode - pointer to inode | |
1371 | * @fattr - updated attributes | |
1372 | * | |
1373 | * After an operation that has changed the inode metadata, mark the | |
1374 | * attribute cache as being invalid, then try to update it. Fake up | |
1375 | * weak cache consistency data, if none exist. | |
1376 | * | |
1377 | * This function is mainly designed to be used by the ->write_done() functions. | |
1378 | */ | |
1379 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1380 | { | |
d65f557f TM |
1381 | int status; |
1382 | ||
1383 | spin_lock(&inode->i_lock); | |
1384 | /* Don't do a WCC update if these attributes are already stale */ | |
1385 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1386 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1387 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1388 | | NFS_ATTR_FATTR_PRESIZE | |
1389 | | NFS_ATTR_FATTR_PREMTIME | |
1390 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1391 | goto out_noforce; |
1392 | } | |
9e6e70f8 TM |
1393 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1394 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1395 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1396 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1397 | } |
9e6e70f8 TM |
1398 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1399 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1400 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1401 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1402 | } | |
1403 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1404 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1405 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1406 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1407 | } | |
1408 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1409 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1410 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1411 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1412 | } |
d65f557f TM |
1413 | out_noforce: |
1414 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1415 | spin_unlock(&inode->i_lock); | |
1416 | return status; | |
70ca8852 | 1417 | } |
ddda8e0a | 1418 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1419 | |
1da177e4 LT |
1420 | /* |
1421 | * Many nfs protocol calls return the new file attributes after | |
1422 | * an operation. Here we update the inode to reflect the state | |
1423 | * of the server's inode. | |
1424 | * | |
1425 | * This is a bit tricky because we have to make sure all dirty pages | |
1426 | * have been sent off to the server before calling invalidate_inode_pages. | |
1427 | * To make sure no other process adds more write requests while we try | |
1428 | * our best to flush them, we make them sleep during the attribute refresh. | |
1429 | * | |
1430 | * A very similar scenario holds for the dir cache. | |
1431 | */ | |
24aa1fe6 | 1432 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1433 | { |
8b4bdcf8 | 1434 | struct nfs_server *server; |
1da177e4 | 1435 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1436 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1437 | unsigned long invalid = 0; |
3e7d950a | 1438 | unsigned long now = jiffies; |
62ab460c | 1439 | unsigned long save_cache_validity; |
1da177e4 | 1440 | |
4f1abd22 | 1441 | dfprintk(VFS, "NFS: %s(%s/%ld fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1442 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1443 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1444 | atomic_read(&inode->i_count), fattr->valid); |
1445 | ||
e73e6c9e MT |
1446 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1447 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1448 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1449 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1450 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1451 | (long long)fattr->fileid); | |
1452 | goto out_err; | |
1453 | } | |
1da177e4 LT |
1454 | |
1455 | /* | |
1456 | * Make sure the inode's type hasn't changed. | |
1457 | */ | |
e73e6c9e MT |
1458 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1459 | /* | |
1460 | * Big trouble! The inode has become a different object. | |
1461 | */ | |
1462 | printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n", | |
1463 | __func__, inode->i_ino, inode->i_mode, fattr->mode); | |
1464 | goto out_err; | |
1465 | } | |
1da177e4 | 1466 | |
8b4bdcf8 | 1467 | server = NFS_SERVER(inode); |
a0356862 | 1468 | /* Update the fsid? */ |
9e6e70f8 | 1469 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1470 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1471 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1472 | server->fsid = fattr->fsid; |
1473 | ||
1da177e4 LT |
1474 | /* |
1475 | * Update the read time so we don't revalidate too often. | |
1476 | */ | |
33801147 | 1477 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1478 | |
62ab460c TM |
1479 | save_cache_validity = nfsi->cache_validity; |
1480 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1481 | | NFS_INO_INVALID_ATIME | |
1482 | | NFS_INO_REVAL_FORCED | |
1483 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1484 | |
a895b4a1 | 1485 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1486 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1487 | |
47aabaa7 | 1488 | /* More cache consistency checks */ |
9e6e70f8 | 1489 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1490 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1491 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1492 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1493 | invalid |= NFS_INO_INVALID_ATTR |
1494 | | NFS_INO_INVALID_DATA | |
1495 | | NFS_INO_INVALID_ACCESS | |
1496 | | NFS_INO_INVALID_ACL | |
1497 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1498 | if (S_ISDIR(inode->i_mode)) |
1499 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1500 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1501 | } |
62ab460c TM |
1502 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1503 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1504 | |
1505 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1506 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c TM |
1507 | } else if (server->caps & NFS_CAP_MTIME) |
1508 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1509 | | NFS_INO_REVAL_FORCED); |
1510 | ||
9e6e70f8 | 1511 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1512 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c TM |
1513 | } else if (server->caps & NFS_CAP_CTIME) |
1514 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c | 1515 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1516 | |
951a143b | 1517 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1518 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1519 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1520 | cur_isize = i_size_read(inode); | |
1521 | if (new_isize != cur_isize) { | |
1522 | /* Do we perhaps have any outstanding writes, or has | |
1523 | * the file grown beyond our last write? */ | |
0f66b598 PT |
1524 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
1525 | new_isize > cur_isize) { | |
9e6e70f8 TM |
1526 | i_size_write(inode, new_isize); |
1527 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1528 | } | |
60c16ea8 HJ |
1529 | dprintk("NFS: isize change on server for file %s/%ld " |
1530 | "(%Ld to %Ld)\n", | |
1531 | inode->i_sb->s_id, | |
1532 | inode->i_ino, | |
1533 | (long long)cur_isize, | |
1534 | (long long)new_isize); | |
1da177e4 | 1535 | } |
62ab460c TM |
1536 | } else |
1537 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1538 | | NFS_INO_REVAL_PAGECACHE | |
1539 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1540 | |
1da177e4 | 1541 | |
9e6e70f8 TM |
1542 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1543 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1544 | else if (server->caps & NFS_CAP_ATIME) |
1545 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1546 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1547 | |
9e6e70f8 TM |
1548 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1549 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1550 | umode_t newmode = inode->i_mode & S_IFMT; |
1551 | newmode |= fattr->mode & S_IALLUGO; | |
1552 | inode->i_mode = newmode; | |
9e6e70f8 | 1553 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1554 | } |
62ab460c TM |
1555 | } else if (server->caps & NFS_CAP_MODE) |
1556 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1557 | | NFS_INO_INVALID_ACCESS | |
1558 | | NFS_INO_INVALID_ACL | |
1559 | | NFS_INO_REVAL_FORCED); | |
1560 | ||
9e6e70f8 | 1561 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1562 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1563 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1564 | inode->i_uid = fattr->uid; | |
1565 | } | |
62ab460c TM |
1566 | } else if (server->caps & NFS_CAP_OWNER) |
1567 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1568 | | NFS_INO_INVALID_ACCESS | |
1569 | | NFS_INO_INVALID_ACL | |
1570 | | NFS_INO_REVAL_FORCED); | |
1571 | ||
9e6e70f8 | 1572 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1573 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1574 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1575 | inode->i_gid = fattr->gid; | |
1576 | } | |
62ab460c TM |
1577 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1578 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1579 | | NFS_INO_INVALID_ACCESS | |
1580 | | NFS_INO_INVALID_ACL | |
1581 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1582 | |
9e6e70f8 TM |
1583 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1584 | if (inode->i_nlink != fattr->nlink) { | |
1585 | invalid |= NFS_INO_INVALID_ATTR; | |
1586 | if (S_ISDIR(inode->i_mode)) | |
1587 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1588 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1589 | } |
62ab460c TM |
1590 | } else if (server->caps & NFS_CAP_NLINK) |
1591 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1592 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1593 | |
9e6e70f8 | 1594 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1595 | /* |
1596 | * report the blocks in 512byte units | |
1597 | */ | |
1598 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1599 | } |
9e6e70f8 TM |
1600 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1601 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1602 | |
1603 | /* Update attrtimeo value if we're out of the unstable period */ | |
aa9c2669 | 1604 | if (invalid & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) { |
91d5b470 | 1605 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1606 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1607 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1608 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1609 | } else { |
64672d55 | 1610 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1611 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1612 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1613 | nfsi->attrtimeo_timestamp = now; | |
1614 | } | |
1da177e4 | 1615 | } |
f2115dc9 | 1616 | invalid &= ~NFS_INO_INVALID_ATTR; |
aa9c2669 | 1617 | invalid &= ~NFS_INO_INVALID_LABEL; |
1da177e4 LT |
1618 | /* Don't invalidate the data if we were to blame */ |
1619 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1620 | || S_ISLNK(inode->i_mode))) | |
1621 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1622 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1623 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1624 | nfsi->cache_validity |= invalid; |
1da177e4 | 1625 | |
de242c0b DH |
1626 | if (invalid & NFS_INO_INVALID_DATA) |
1627 | nfs_fscache_invalidate(inode); | |
1628 | ||
1da177e4 | 1629 | return 0; |
b37b03b7 | 1630 | out_err: |
1da177e4 LT |
1631 | /* |
1632 | * No need to worry about unhashing the dentry, as the | |
1633 | * lookup validation will know that the inode is bad. | |
1634 | * (But we fall through to invalidate the caches.) | |
1635 | */ | |
1636 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1637 | return -ESTALE; |
1638 | } | |
1639 | ||
f7b422b1 | 1640 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1641 | { |
1642 | struct nfs_inode *nfsi; | |
e94b1766 | 1643 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1644 | if (!nfsi) |
1645 | return NULL; | |
55296809 CL |
1646 | nfsi->flags = 0UL; |
1647 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1648 | #ifdef CONFIG_NFS_V3_ACL |
1649 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1650 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1651 | #endif | |
89d77c8f | 1652 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1653 | nfsi->nfs4_acl = NULL; |
1654 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1655 | return &nfsi->vfs_inode; |
1656 | } | |
89d77c8f | 1657 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1658 | |
fa0d7e3d | 1659 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1660 | { |
fa0d7e3d | 1661 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1662 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1663 | } | |
1664 | ||
fa0d7e3d NP |
1665 | void nfs_destroy_inode(struct inode *inode) |
1666 | { | |
1667 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1668 | } | |
89d77c8f | 1669 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1670 | |
d75d5414 AM |
1671 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1672 | { | |
89d77c8f | 1673 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1674 | INIT_LIST_HEAD(&nfsi->open_states); |
1675 | nfsi->delegation = NULL; | |
1676 | nfsi->delegation_state = 0; | |
1677 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1678 | nfsi->layout = NULL; |
d75d5414 AM |
1679 | #endif |
1680 | } | |
f7b422b1 | 1681 | |
51cc5068 | 1682 | static void init_once(void *foo) |
1da177e4 LT |
1683 | { |
1684 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1685 | ||
a35afb83 | 1686 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1687 | INIT_LIST_HEAD(&nfsi->open_files); |
1688 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1689 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1690 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1691 | nfsi->npages = 0; |
ea2cf228 | 1692 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1693 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1694 | atomic_set(&nfsi->silly_count, 1); |
1695 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1696 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1697 | nfs4_init_once(nfsi); |
1da177e4 | 1698 | } |
20c2df83 | 1699 | |
f7b422b1 | 1700 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1701 | { |
1702 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1703 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1704 | 0, (SLAB_RECLAIM_ACCOUNT| |
1705 | SLAB_MEM_SPREAD), | |
20c2df83 | 1706 | init_once); |
1da177e4 LT |
1707 | if (nfs_inode_cachep == NULL) |
1708 | return -ENOMEM; | |
1709 | ||
1710 | return 0; | |
1711 | } | |
1712 | ||
266bee88 | 1713 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1714 | { |
8c0a8537 KS |
1715 | /* |
1716 | * Make sure all delayed rcu free inodes are flushed before we | |
1717 | * destroy cache. | |
1718 | */ | |
1719 | rcu_barrier(); | |
1a1d92c1 | 1720 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1721 | } |
1722 | ||
5746006f | 1723 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1724 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1725 | |
1726 | /* | |
1727 | * start up the nfsiod workqueue | |
1728 | */ | |
1729 | static int nfsiod_start(void) | |
1730 | { | |
1731 | struct workqueue_struct *wq; | |
1732 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1733 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1734 | if (wq == NULL) |
1735 | return -ENOMEM; | |
1736 | nfsiod_workqueue = wq; | |
1737 | return 0; | |
1738 | } | |
1739 | ||
1740 | /* | |
1741 | * Destroy the nfsiod workqueue | |
1742 | */ | |
1743 | static void nfsiod_stop(void) | |
1744 | { | |
1745 | struct workqueue_struct *wq; | |
1746 | ||
1747 | wq = nfsiod_workqueue; | |
1748 | if (wq == NULL) | |
1749 | return; | |
1750 | nfsiod_workqueue = NULL; | |
1751 | destroy_workqueue(wq); | |
1752 | } | |
1753 | ||
1b340d01 | 1754 | int nfs_net_id; |
9e2e74db | 1755 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1756 | |
1757 | static int nfs_net_init(struct net *net) | |
1758 | { | |
6b13168b | 1759 | nfs_clients_init(net); |
c8d74d9b | 1760 | return 0; |
1b340d01 SK |
1761 | } |
1762 | ||
1763 | static void nfs_net_exit(struct net *net) | |
1764 | { | |
28cd1b3f | 1765 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1766 | } |
1767 | ||
1768 | static struct pernet_operations nfs_net_ops = { | |
1769 | .init = nfs_net_init, | |
1770 | .exit = nfs_net_exit, | |
1771 | .id = &nfs_net_id, | |
1772 | .size = sizeof(struct nfs_net), | |
1773 | }; | |
1774 | ||
1da177e4 LT |
1775 | /* |
1776 | * Initialize NFS | |
1777 | */ | |
1778 | static int __init init_nfs_fs(void) | |
1779 | { | |
1780 | int err; | |
1781 | ||
1b340d01 | 1782 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1783 | if (err < 0) |
89d77c8f | 1784 | goto out9; |
e571cbf1 | 1785 | |
8ec442ae DH |
1786 | err = nfs_fscache_register(); |
1787 | if (err < 0) | |
89d77c8f | 1788 | goto out8; |
8ec442ae | 1789 | |
5746006f TM |
1790 | err = nfsiod_start(); |
1791 | if (err) | |
89d77c8f | 1792 | goto out7; |
5746006f | 1793 | |
6aaca566 DH |
1794 | err = nfs_fs_proc_init(); |
1795 | if (err) | |
89d77c8f | 1796 | goto out6; |
6aaca566 | 1797 | |
1da177e4 LT |
1798 | err = nfs_init_nfspagecache(); |
1799 | if (err) | |
89d77c8f | 1800 | goto out5; |
1da177e4 LT |
1801 | |
1802 | err = nfs_init_inodecache(); | |
1803 | if (err) | |
89d77c8f | 1804 | goto out4; |
1da177e4 LT |
1805 | |
1806 | err = nfs_init_readpagecache(); | |
1807 | if (err) | |
89d77c8f | 1808 | goto out3; |
1da177e4 LT |
1809 | |
1810 | err = nfs_init_writepagecache(); | |
1811 | if (err) | |
89d77c8f | 1812 | goto out2; |
1da177e4 | 1813 | |
1da177e4 LT |
1814 | err = nfs_init_directcache(); |
1815 | if (err) | |
89d77c8f | 1816 | goto out1; |
1da177e4 LT |
1817 | |
1818 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1819 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1820 | #endif |
f7b422b1 | 1821 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1822 | goto out0; |
1823 | ||
1da177e4 | 1824 | return 0; |
129d1977 | 1825 | out0: |
1da177e4 | 1826 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1827 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1828 | #endif |
1da177e4 | 1829 | nfs_destroy_directcache(); |
89d77c8f | 1830 | out1: |
129d1977 | 1831 | nfs_destroy_writepagecache(); |
89d77c8f | 1832 | out2: |
129d1977 | 1833 | nfs_destroy_readpagecache(); |
89d77c8f | 1834 | out3: |
129d1977 | 1835 | nfs_destroy_inodecache(); |
89d77c8f | 1836 | out4: |
129d1977 | 1837 | nfs_destroy_nfspagecache(); |
89d77c8f | 1838 | out5: |
129d1977 | 1839 | nfs_fs_proc_exit(); |
89d77c8f | 1840 | out6: |
129d1977 | 1841 | nfsiod_stop(); |
89d77c8f | 1842 | out7: |
129d1977 | 1843 | nfs_fscache_unregister(); |
89d77c8f | 1844 | out8: |
129d1977 | 1845 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 1846 | out9: |
1da177e4 LT |
1847 | return err; |
1848 | } | |
1849 | ||
1850 | static void __exit exit_nfs_fs(void) | |
1851 | { | |
1da177e4 | 1852 | nfs_destroy_directcache(); |
1da177e4 LT |
1853 | nfs_destroy_writepagecache(); |
1854 | nfs_destroy_readpagecache(); | |
1855 | nfs_destroy_inodecache(); | |
1856 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1857 | nfs_fscache_unregister(); |
1b340d01 | 1858 | unregister_pernet_subsys(&nfs_net_ops); |
1da177e4 | 1859 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1860 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1861 | #endif |
f7b422b1 | 1862 | unregister_nfs_fs(); |
6aaca566 | 1863 | nfs_fs_proc_exit(); |
5746006f | 1864 | nfsiod_stop(); |
1da177e4 LT |
1865 | } |
1866 | ||
1867 | /* Not quite true; I just maintain it */ | |
1868 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1869 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1870 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1871 | |
1872 | module_init(init_nfs_fs) | |
1873 | module_exit(exit_nfs_fs) |