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" |
e571cbf1 | 51 | #include "dns_resolve.h" |
e5e94017 | 52 | #include "pnfs.h" |
ab7017a3 | 53 | #include "nfs.h" |
1b340d01 | 54 | #include "netns.h" |
1da177e4 LT |
55 | |
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; | |
d310310c | 82 | freezable_schedule(); |
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 | ||
19d87ca3 | 110 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 111 | { |
da6d503a TM |
112 | /* |
113 | * The following should never happen... | |
114 | */ | |
115 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 116 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 117 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 118 | nfs_access_zap_cache(inode); |
ef79c097 | 119 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 | 120 | } |
89d77c8f | 121 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 122 | |
b57922d9 AV |
123 | void nfs_evict_inode(struct inode *inode) |
124 | { | |
125 | truncate_inode_pages(&inode->i_data, 0); | |
dbd5768f | 126 | clear_inode(inode); |
b57922d9 AV |
127 | nfs_clear_inode(inode); |
128 | } | |
129 | ||
29884df0 TM |
130 | /** |
131 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
132 | */ | |
133 | int nfs_sync_mapping(struct address_space *mapping) | |
134 | { | |
5cf95214 | 135 | int ret = 0; |
29884df0 | 136 | |
5cf95214 TM |
137 | if (mapping->nrpages != 0) { |
138 | unmap_mapping_range(mapping, 0, 0, 0); | |
139 | ret = nfs_wb_all(mapping->host); | |
140 | } | |
29884df0 TM |
141 | return ret; |
142 | } | |
143 | ||
1da177e4 LT |
144 | /* |
145 | * Invalidate the local caches | |
146 | */ | |
b37b03b7 | 147 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
148 | { |
149 | struct nfs_inode *nfsi = NFS_I(inode); | |
150 | int mode = inode->i_mode; | |
151 | ||
91d5b470 CL |
152 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
153 | ||
c7c20973 TM |
154 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
155 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 156 | |
c3f52af3 | 157 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
1da177e4 | 158 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) |
55296809 | 159 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 160 | else |
55296809 | 161 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 162 | } |
dc59250c | 163 | |
b37b03b7 TM |
164 | void nfs_zap_caches(struct inode *inode) |
165 | { | |
166 | spin_lock(&inode->i_lock); | |
167 | nfs_zap_caches_locked(inode); | |
dc59250c | 168 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
169 | } |
170 | ||
cd9ae2b6 TM |
171 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
172 | { | |
173 | if (mapping->nrpages != 0) { | |
174 | spin_lock(&inode->i_lock); | |
175 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
176 | spin_unlock(&inode->i_lock); | |
177 | } | |
178 | } | |
179 | ||
f41f7418 | 180 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
181 | { |
182 | void (*clear_acl_cache)(struct inode *); | |
183 | ||
184 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
185 | if (clear_acl_cache != NULL) | |
186 | clear_acl_cache(inode); | |
dc59250c | 187 | spin_lock(&inode->i_lock); |
55296809 | 188 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 189 | spin_unlock(&inode->i_lock); |
1da177e4 | 190 | } |
1c606fb7 | 191 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 192 | |
c4812998 TM |
193 | void nfs_invalidate_atime(struct inode *inode) |
194 | { | |
195 | spin_lock(&inode->i_lock); | |
196 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
197 | spin_unlock(&inode->i_lock); | |
198 | } | |
ddda8e0a | 199 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 200 | |
1da177e4 | 201 | /* |
b37b03b7 TM |
202 | * Invalidate, but do not unhash, the inode. |
203 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 204 | */ |
b37b03b7 | 205 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 206 | { |
3a10c30a | 207 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 208 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
209 | } |
210 | ||
211 | struct nfs_find_desc { | |
212 | struct nfs_fh *fh; | |
213 | struct nfs_fattr *fattr; | |
214 | }; | |
215 | ||
216 | /* | |
217 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
218 | * this, and re-exported directories (also seen in NFSv2) | |
219 | * we are forced to allow 2 different inodes to have the same | |
220 | * i_ino. | |
221 | */ | |
222 | static int | |
223 | nfs_find_actor(struct inode *inode, void *opaque) | |
224 | { | |
225 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
226 | struct nfs_fh *fh = desc->fh; | |
227 | struct nfs_fattr *fattr = desc->fattr; | |
228 | ||
229 | if (NFS_FILEID(inode) != fattr->fileid) | |
230 | return 0; | |
231 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
232 | return 0; | |
233 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
234 | return 0; | |
235 | return 1; | |
236 | } | |
237 | ||
238 | static int | |
239 | nfs_init_locked(struct inode *inode, void *opaque) | |
240 | { | |
241 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
242 | struct nfs_fattr *fattr = desc->fattr; | |
243 | ||
99fadcd7 | 244 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
245 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
246 | return 0; | |
247 | } | |
248 | ||
1da177e4 LT |
249 | /* |
250 | * This is our front-end to iget that looks up inodes by file handle | |
251 | * instead of inode number. | |
252 | */ | |
253 | struct inode * | |
254 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
255 | { | |
256 | struct nfs_find_desc desc = { | |
257 | .fh = fh, | |
258 | .fattr = fattr | |
259 | }; | |
03f28e3a | 260 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
261 | unsigned long hash; |
262 | ||
7ebb9315 BS |
263 | nfs_attr_check_mountpoint(sb, fattr); |
264 | ||
533eb461 AA |
265 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
266 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 267 | goto out_no_inode; |
9e6e70f8 | 268 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 269 | goto out_no_inode; |
1da177e4 LT |
270 | |
271 | hash = nfs_fattr_to_ino_t(fattr); | |
272 | ||
03f28e3a TM |
273 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
274 | if (inode == NULL) { | |
275 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 276 | goto out_no_inode; |
03f28e3a | 277 | } |
1da177e4 LT |
278 | |
279 | if (inode->i_state & I_NEW) { | |
280 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 281 | unsigned long now = jiffies; |
1da177e4 LT |
282 | |
283 | /* We set i_ino for the few things that still rely on it, | |
284 | * such as stat(2) */ | |
285 | inode->i_ino = hash; | |
286 | ||
287 | /* We can't support update_atime(), since the server will reset it */ | |
288 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
289 | inode->i_mode = fattr->mode; | |
62ab460c TM |
290 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
291 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
4124bbc5 | 292 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
293 | /* Why so? Because we want revalidate for devices/FIFOs, and |
294 | * that's precisely what we have in nfs_file_inode_operations. | |
295 | */ | |
8fa5c000 | 296 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 297 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 298 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
299 | inode->i_data.a_ops = &nfs_file_aops; |
300 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
301 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 302 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 303 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 304 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 305 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
306 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
307 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
308 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
309 | inode->i_op = &nfs_referral_inode_operations; | |
310 | else | |
311 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 312 | inode->i_fop = NULL; |
36d43a43 | 313 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 314 | } |
1da177e4 LT |
315 | } else if (S_ISLNK(inode->i_mode)) |
316 | inode->i_op = &nfs_symlink_inode_operations; | |
317 | else | |
318 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
319 | ||
9e6e70f8 TM |
320 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
321 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
322 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 323 | inode->i_version = 0; |
9e6e70f8 | 324 | inode->i_size = 0; |
6d6b77f1 | 325 | clear_nlink(inode); |
9e6e70f8 TM |
326 | inode->i_uid = -2; |
327 | inode->i_gid = -2; | |
328 | inode->i_blocks = 0; | |
329 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
330 | nfsi->write_io = 0; |
331 | nfsi->read_io = 0; | |
9e6e70f8 | 332 | |
33801147 | 333 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 334 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
335 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
336 | inode->i_atime = fattr->atime; | |
62ab460c TM |
337 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
338 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
339 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
340 | inode->i_mtime = fattr->mtime; | |
62ab460c | 341 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
4124bbc5 | 342 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
343 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
344 | inode->i_ctime = fattr->ctime; | |
62ab460c | 345 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
4124bbc5 | 346 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 | 347 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 348 | inode->i_version = fattr->change_attr; |
62ab460c | 349 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
4124bbc5 | 350 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
351 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
352 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
353 | else |
354 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
62ab460c | 355 | | NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 356 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 357 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
358 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
359 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
360 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
361 | inode->i_uid = fattr->uid; | |
62ab460c | 362 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
4124bbc5 | 363 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
364 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
365 | inode->i_gid = fattr->gid; | |
62ab460c | 366 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
4124bbc5 | 367 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
368 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
369 | inode->i_blocks = fattr->du.nfs2.blocks; | |
370 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
371 | /* |
372 | * report the blocks in 512byte units | |
373 | */ | |
374 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
375 | } |
376 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 377 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 378 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 379 | |
ef79c097 DH |
380 | nfs_fscache_init_inode_cookie(inode); |
381 | ||
1da177e4 LT |
382 | unlock_new_inode(inode); |
383 | } else | |
384 | nfs_refresh_inode(inode, fattr); | |
4f1abd22 | 385 | dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n", |
1da177e4 LT |
386 | inode->i_sb->s_id, |
387 | (long long)NFS_FILEID(inode), | |
4f1abd22 | 388 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
389 | atomic_read(&inode->i_count)); |
390 | ||
391 | out: | |
392 | return inode; | |
393 | ||
394 | out_no_inode: | |
03f28e3a | 395 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
396 | goto out; |
397 | } | |
89d77c8f | 398 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 399 | |
536e43d1 | 400 | #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 |
401 | |
402 | int | |
403 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
404 | { | |
405 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
406 | struct nfs_fattr *fattr; |
407 | int error = -ENOMEM; | |
1da177e4 | 408 | |
91d5b470 CL |
409 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
410 | ||
188b95dd JL |
411 | /* skip mode change if it's just for clearing setuid/setgid */ |
412 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
413 | attr->ia_valid &= ~ATTR_MODE; | |
414 | ||
1da177e4 LT |
415 | if (attr->ia_valid & ATTR_SIZE) { |
416 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
417 | attr->ia_valid &= ~ATTR_SIZE; | |
418 | } | |
419 | ||
420 | /* Optimization: if the end result is no change, don't RPC */ | |
421 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 422 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
423 | return 0; |
424 | ||
755c1e20 | 425 | /* Write all dirty data */ |
1d59d61f TM |
426 | if (S_ISREG(inode->i_mode)) { |
427 | nfs_inode_dio_wait(inode); | |
e1552e19 | 428 | nfs_wb_all(inode); |
1d59d61f | 429 | } |
987f8dfc TM |
430 | |
431 | fattr = nfs_alloc_fattr(); | |
432 | if (fattr == NULL) | |
433 | goto out; | |
642ac549 TM |
434 | /* |
435 | * Return any delegations if we're going to change ACLs | |
436 | */ | |
437 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 438 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 439 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 440 | if (error == 0) |
987f8dfc TM |
441 | nfs_refresh_inode(inode, fattr); |
442 | nfs_free_fattr(fattr); | |
443 | out: | |
65e4308d TM |
444 | return error; |
445 | } | |
ddda8e0a | 446 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 447 | |
a3d01454 TM |
448 | /** |
449 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
450 | * @inode: inode of the file used | |
451 | * @offset: file offset to start truncating | |
452 | * | |
453 | * This is a copy of the common vmtruncate, but with the locking | |
454 | * corrected to take into account the fact that NFS requires | |
455 | * inode->i_size to be updated under the inode->i_lock. | |
456 | */ | |
457 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
458 | { | |
c08d3b0e | 459 | loff_t oldsize; |
460 | int err; | |
a3d01454 | 461 | |
c08d3b0e | 462 | err = inode_newsize_ok(inode, offset); |
463 | if (err) | |
464 | goto out; | |
a3d01454 | 465 | |
c08d3b0e | 466 | spin_lock(&inode->i_lock); |
467 | oldsize = inode->i_size; | |
468 | i_size_write(inode, offset); | |
469 | spin_unlock(&inode->i_lock); | |
470 | ||
471 | truncate_pagecache(inode, oldsize, offset); | |
472 | out: | |
473 | return err; | |
a3d01454 TM |
474 | } |
475 | ||
65e4308d TM |
476 | /** |
477 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
478 | * @inode: pointer to struct inode | |
479 | * @attr: pointer to struct iattr | |
480 | * | |
481 | * Note: we do this in the *proc.c in order to ensure that | |
482 | * it works for things like exclusive creates too. | |
483 | */ | |
484 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
485 | { | |
486 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 487 | spin_lock(&inode->i_lock); |
1da177e4 | 488 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
489 | int mode = attr->ia_mode & S_IALLUGO; |
490 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
491 | inode->i_mode = mode; |
492 | } | |
493 | if ((attr->ia_valid & ATTR_UID) != 0) | |
494 | inode->i_uid = attr->ia_uid; | |
495 | if ((attr->ia_valid & ATTR_GID) != 0) | |
496 | inode->i_gid = attr->ia_gid; | |
55296809 | 497 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 498 | spin_unlock(&inode->i_lock); |
65e4308d TM |
499 | } |
500 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 501 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 502 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 503 | } |
1da177e4 | 504 | } |
ddda8e0a | 505 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 506 | |
1da177e4 LT |
507 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
508 | { | |
509 | struct inode *inode = dentry->d_inode; | |
55296809 | 510 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
511 | int err; |
512 | ||
acdc53b2 | 513 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 514 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 515 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
516 | err = filemap_write_and_wait(inode->i_mapping); |
517 | if (err) | |
518 | goto out; | |
28c494c5 | 519 | } |
fc33a7bb CH |
520 | |
521 | /* | |
522 | * We may force a getattr if the user cares about atime. | |
523 | * | |
524 | * Note that we only have to check the vfsmount flags here: | |
525 | * - NFS always sets S_NOATIME by so checking it would give a | |
526 | * bogus result | |
527 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
528 | * no point in checking those. | |
529 | */ | |
530 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
531 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 532 | need_atime = 0; |
fc33a7bb | 533 | |
1da177e4 LT |
534 | if (need_atime) |
535 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
536 | else | |
537 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 538 | if (!err) { |
1da177e4 | 539 | generic_fillattr(inode, stat); |
f43bf0be | 540 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 541 | } |
acdc53b2 | 542 | out: |
1da177e4 LT |
543 | return err; |
544 | } | |
ddda8e0a | 545 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 546 | |
f11ac8db TM |
547 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
548 | { | |
549 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
550 | l_ctx->lockowner.l_owner = current->files; |
551 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db TM |
552 | INIT_LIST_HEAD(&l_ctx->list); |
553 | } | |
554 | ||
555 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
556 | { | |
557 | struct nfs_lock_context *pos; | |
558 | ||
559 | list_for_each_entry(pos, &ctx->lock_context.list, list) { | |
2a369153 | 560 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 561 | continue; |
2a369153 | 562 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
563 | continue; |
564 | atomic_inc(&pos->count); | |
565 | return pos; | |
566 | } | |
567 | return NULL; | |
568 | } | |
569 | ||
570 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
571 | { | |
572 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 573 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
574 | |
575 | spin_lock(&inode->i_lock); | |
576 | res = __nfs_find_lock_context(ctx); | |
577 | if (res == NULL) { | |
578 | spin_unlock(&inode->i_lock); | |
579 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
580 | if (new == NULL) | |
b3c54de6 | 581 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
582 | nfs_init_lock_context(new); |
583 | spin_lock(&inode->i_lock); | |
584 | res = __nfs_find_lock_context(ctx); | |
585 | if (res == NULL) { | |
586 | list_add_tail(&new->list, &ctx->lock_context.list); | |
587 | new->open_context = ctx; | |
588 | res = new; | |
589 | new = NULL; | |
590 | } | |
591 | } | |
592 | spin_unlock(&inode->i_lock); | |
593 | kfree(new); | |
594 | return res; | |
595 | } | |
596 | ||
597 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
598 | { | |
599 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 600 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
601 | |
602 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
603 | return; | |
604 | list_del(&l_ctx->list); | |
605 | spin_unlock(&inode->i_lock); | |
606 | kfree(l_ctx); | |
607 | } | |
608 | ||
7fe5c398 TM |
609 | /** |
610 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
611 | * @ctx: pointer to context | |
612 | * @is_sync: is this a synchronous close | |
613 | * | |
614 | * always ensure that the attributes are up to date if we're mounted | |
615 | * with close-to-open semantics | |
616 | */ | |
617 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
618 | { | |
619 | struct inode *inode; | |
620 | struct nfs_server *server; | |
621 | ||
622 | if (!(ctx->mode & FMODE_WRITE)) | |
623 | return; | |
624 | if (!is_sync) | |
625 | return; | |
3d4ff43d | 626 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
627 | if (!list_empty(&NFS_I(inode)->open_files)) |
628 | return; | |
629 | server = NFS_SERVER(inode); | |
630 | if (server->flags & NFS_MOUNT_NOCTO) | |
631 | return; | |
632 | nfs_revalidate_inode(server, inode); | |
633 | } | |
ddda8e0a | 634 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 635 | |
5ede7b1c | 636 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
637 | { |
638 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
639 | struct rpc_cred *cred = rpc_lookup_cred(); |
640 | if (IS_ERR(cred)) | |
641 | return ERR_CAST(cred); | |
1da177e4 | 642 | |
f52720ca | 643 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
644 | if (!ctx) { |
645 | put_rpccred(cred); | |
646 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 647 | } |
5ede7b1c AV |
648 | nfs_sb_active(dentry->d_sb); |
649 | ctx->dentry = dget(dentry); | |
650 | ctx->cred = cred; | |
651 | ctx->state = NULL; | |
652 | ctx->mode = f_mode; | |
653 | ctx->flags = 0; | |
654 | ctx->error = 0; | |
655 | nfs_init_lock_context(&ctx->lock_context); | |
656 | ctx->lock_context.open_context = ctx; | |
657 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 658 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
659 | return ctx; |
660 | } | |
89d77c8f | 661 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
662 | |
663 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
664 | { | |
665 | if (ctx != NULL) | |
f11ac8db | 666 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
667 | return ctx; |
668 | } | |
89d77c8f | 669 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 670 | |
7fe5c398 | 671 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 672 | { |
3d4ff43d AV |
673 | struct inode *inode = ctx->dentry->d_inode; |
674 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 675 | |
5c78f58e | 676 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
677 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
678 | return; | |
679 | list_del(&ctx->list); | |
680 | spin_unlock(&inode->i_lock); | |
ef84303e | 681 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 682 | return; |
5c78f58e TM |
683 | if (inode != NULL) |
684 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
685 | if (ctx->cred != NULL) |
686 | put_rpccred(ctx->cred); | |
3d4ff43d | 687 | dput(ctx->dentry); |
324d003b WAA |
688 | if (is_sync) |
689 | nfs_sb_deactive(sb); | |
690 | else | |
691 | nfs_sb_deactive_async(sb); | |
82be417a | 692 | kfree(ctx->mdsthreshold); |
3bec63db TM |
693 | kfree(ctx); |
694 | } | |
695 | ||
a49c3c77 TM |
696 | void put_nfs_open_context(struct nfs_open_context *ctx) |
697 | { | |
698 | __put_nfs_open_context(ctx, 0); | |
699 | } | |
89d77c8f | 700 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 701 | |
1da177e4 LT |
702 | /* |
703 | * Ensure that mmap has a recent RPC credential for use when writing out | |
704 | * shared pages | |
705 | */ | |
cd9a1c0e | 706 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 707 | { |
01cce933 | 708 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
709 | struct nfs_inode *nfsi = NFS_I(inode); |
710 | ||
711 | filp->private_data = get_nfs_open_context(ctx); | |
712 | spin_lock(&inode->i_lock); | |
713 | list_add(&ctx->list, &nfsi->open_files); | |
714 | spin_unlock(&inode->i_lock); | |
715 | } | |
89d77c8f | 716 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 717 | |
d530838b TM |
718 | /* |
719 | * Given an inode, search for an open context with the desired characteristics | |
720 | */ | |
dc0b027d | 721 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
722 | { |
723 | struct nfs_inode *nfsi = NFS_I(inode); | |
724 | struct nfs_open_context *pos, *ctx = NULL; | |
725 | ||
726 | spin_lock(&inode->i_lock); | |
727 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
728 | if (cred != NULL && pos->cred != cred) |
729 | continue; | |
1544fa0f TM |
730 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
731 | continue; | |
732 | ctx = get_nfs_open_context(pos); | |
733 | break; | |
1da177e4 LT |
734 | } |
735 | spin_unlock(&inode->i_lock); | |
736 | return ctx; | |
737 | } | |
738 | ||
b92dccf6 | 739 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 740 | { |
01cce933 | 741 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 742 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
743 | |
744 | if (ctx) { | |
745 | filp->private_data = NULL; | |
746 | spin_lock(&inode->i_lock); | |
747 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
748 | spin_unlock(&inode->i_lock); | |
f895c53f | 749 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
750 | } |
751 | } | |
752 | ||
753 | /* | |
754 | * These allocate and release file read/write context information. | |
755 | */ | |
756 | int nfs_open(struct inode *inode, struct file *filp) | |
757 | { | |
758 | struct nfs_open_context *ctx; | |
1da177e4 | 759 | |
5ede7b1c AV |
760 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
761 | if (IS_ERR(ctx)) | |
762 | return PTR_ERR(ctx); | |
1da177e4 LT |
763 | nfs_file_set_open_context(filp, ctx); |
764 | put_nfs_open_context(ctx); | |
ef79c097 | 765 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
766 | return 0; |
767 | } | |
768 | ||
769 | int nfs_release(struct inode *inode, struct file *filp) | |
770 | { | |
1da177e4 LT |
771 | nfs_file_clear_open_context(filp); |
772 | return 0; | |
773 | } | |
774 | ||
775 | /* | |
776 | * This function is called whenever some part of NFS notices that | |
777 | * the cached attributes have to be refreshed. | |
778 | */ | |
779 | int | |
780 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
781 | { | |
782 | int status = -ESTALE; | |
a3cba2aa | 783 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 784 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
785 | |
786 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
787 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
788 | ||
85233a7a | 789 | if (is_bad_inode(inode)) |
691beb13 | 790 | goto out; |
1da177e4 | 791 | if (NFS_STALE(inode)) |
412d582e | 792 | goto out; |
7fdc49c4 | 793 | |
a3cba2aa TM |
794 | status = -ENOMEM; |
795 | fattr = nfs_alloc_fattr(); | |
796 | if (fattr == NULL) | |
797 | goto out; | |
798 | ||
691beb13 | 799 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 800 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
801 | if (status != 0) { |
802 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
803 | inode->i_sb->s_id, | |
804 | (long long)NFS_FILEID(inode), status); | |
805 | if (status == -ESTALE) { | |
806 | nfs_zap_caches(inode); | |
807 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 808 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
809 | } |
810 | goto out; | |
811 | } | |
812 | ||
a3cba2aa | 813 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
814 | if (status) { |
815 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
816 | inode->i_sb->s_id, | |
817 | (long long)NFS_FILEID(inode), status); | |
818 | goto out; | |
819 | } | |
55296809 | 820 | |
24aa1fe6 | 821 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 822 | nfs_zap_acl_cache(inode); |
55296809 | 823 | |
1da177e4 LT |
824 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
825 | inode->i_sb->s_id, | |
826 | (long long)NFS_FILEID(inode)); | |
827 | ||
412d582e | 828 | out: |
a3cba2aa | 829 | nfs_free_fattr(fattr); |
1da177e4 LT |
830 | return status; |
831 | } | |
832 | ||
833 | int nfs_attribute_timeout(struct inode *inode) | |
834 | { | |
835 | struct nfs_inode *nfsi = NFS_I(inode); | |
836 | ||
d7cf8dd0 TM |
837 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
838 | } | |
839 | ||
840 | static int nfs_attribute_cache_expired(struct inode *inode) | |
841 | { | |
b4d2314b | 842 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 843 | return 0; |
d7cf8dd0 | 844 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
845 | } |
846 | ||
847 | /** | |
848 | * nfs_revalidate_inode - Revalidate the inode attributes | |
849 | * @server - pointer to nfs_server struct | |
850 | * @inode - pointer to inode struct | |
851 | * | |
852 | * Updates inode attribute information by retrieving the data from the server. | |
853 | */ | |
854 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
855 | { | |
44b11874 | 856 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
d7cf8dd0 | 857 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
858 | return NFS_STALE(inode) ? -ESTALE : 0; |
859 | return __nfs_revalidate_inode(server, inode); | |
860 | } | |
1c606fb7 | 861 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 862 | |
1cda707d | 863 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
864 | { |
865 | struct nfs_inode *nfsi = NFS_I(inode); | |
866 | ||
867 | if (mapping->nrpages != 0) { | |
868 | int ret = invalidate_inode_pages2(mapping); | |
869 | if (ret < 0) | |
870 | return ret; | |
871 | } | |
872 | spin_lock(&inode->i_lock); | |
873 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 874 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 875 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
876 | spin_unlock(&inode->i_lock); |
877 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 878 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
879 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
880 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
881 | return 0; | |
882 | } | |
883 | ||
b4b1eadf TM |
884 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
885 | { | |
886 | if (nfs_have_delegated_attributes(inode)) | |
887 | return false; | |
888 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
889 | || nfs_attribute_timeout(inode) | |
890 | || NFS_STALE(inode); | |
891 | } | |
892 | ||
717d44e8 TM |
893 | /** |
894 | * nfs_revalidate_mapping - Revalidate the pagecache | |
895 | * @inode - pointer to host inode | |
896 | * @mapping - pointer to mapping | |
717d44e8 TM |
897 | */ |
898 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
899 | { | |
900 | struct nfs_inode *nfsi = NFS_I(inode); | |
901 | int ret = 0; | |
dc59250c | 902 | |
29418aa4 MG |
903 | /* swapfiles are not supposed to be shared. */ |
904 | if (IS_SWAPFILE(inode)) | |
905 | goto out; | |
906 | ||
b4b1eadf | 907 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
908 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
909 | if (ret < 0) | |
910 | goto out; | |
7d52e862 | 911 | } |
717d44e8 TM |
912 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
913 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 914 | out: |
44b11874 | 915 | return ret; |
7d52e862 TM |
916 | } |
917 | ||
27dc1cd3 | 918 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
919 | { |
920 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 921 | unsigned long ret = 0; |
a895b4a1 | 922 | |
9e6e70f8 TM |
923 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
924 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
925 | && inode->i_version == fattr->pre_change_attr) { |
926 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
927 | if (S_ISDIR(inode->i_mode)) |
928 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 929 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 930 | } |
a895b4a1 | 931 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
932 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
933 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
934 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
935 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
936 | ret |= NFS_INO_INVALID_ATTR; | |
937 | } | |
9e6e70f8 TM |
938 | |
939 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
940 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
941 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
942 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
943 | if (S_ISDIR(inode->i_mode)) | |
944 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
945 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 946 | } |
9e6e70f8 TM |
947 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
948 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
949 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
950 | && nfsi->npages == 0) { |
951 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
952 | ret |= NFS_INO_INVALID_ATTR; | |
953 | } | |
954 | return ret; | |
a895b4a1 TM |
955 | } |
956 | ||
1da177e4 | 957 | /** |
33801147 | 958 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
959 | * @inode - pointer to inode |
960 | * @fattr - updated attributes | |
961 | * | |
962 | * Verifies the attribute cache. If we have just changed the attributes, | |
963 | * so that fattr carries weak cache consistency data, then it may | |
964 | * also update the ctime/mtime/change_attribute. | |
965 | */ | |
33801147 | 966 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
967 | { |
968 | struct nfs_inode *nfsi = NFS_I(inode); | |
969 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 970 | unsigned long invalid = 0; |
1da177e4 | 971 | |
dc59250c | 972 | |
01da47bd TM |
973 | if (nfs_have_delegated_attributes(inode)) |
974 | return 0; | |
ca62b9c3 | 975 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
976 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
977 | return -EIO; | |
978 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 979 | return -EIO; |
ca62b9c3 | 980 | |
9e6e70f8 | 981 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 982 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 983 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 984 | |
1da177e4 | 985 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 986 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 987 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 988 | |
9e6e70f8 TM |
989 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
990 | cur_size = i_size_read(inode); | |
991 | new_isize = nfs_size_to_loff_t(fattr->size); | |
992 | if (cur_size != new_isize && nfsi->npages == 0) | |
993 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
994 | } | |
1da177e4 LT |
995 | |
996 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
997 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
998 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
999 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
1000 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
1001 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 1002 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1003 | |
1004 | /* Has the link count changed? */ | |
9e6e70f8 | 1005 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1006 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1007 | |
9e6e70f8 | 1008 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1009 | invalid |= NFS_INO_INVALID_ATIME; |
1010 | ||
1011 | if (invalid != 0) | |
1012 | nfsi->cache_validity |= invalid; | |
1da177e4 | 1013 | |
33801147 | 1014 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1015 | return 0; |
1016 | } | |
1017 | ||
a10ad176 | 1018 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1019 | { |
9e6e70f8 TM |
1020 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1021 | return 0; | |
a10ad176 TM |
1022 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1023 | } | |
1024 | ||
1025 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1026 | { | |
9e6e70f8 TM |
1027 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1028 | return 0; | |
a10ad176 TM |
1029 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1030 | } | |
870a5be8 | 1031 | |
ae05f269 | 1032 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1033 | |
1034 | static unsigned long nfs_read_attr_generation_counter(void) | |
1035 | { | |
ae05f269 | 1036 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1037 | } |
1038 | ||
1039 | unsigned long nfs_inc_attr_generation_counter(void) | |
1040 | { | |
ae05f269 | 1041 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1042 | } |
1043 | ||
1044 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1045 | { | |
1046 | fattr->valid = 0; | |
1047 | fattr->time_start = jiffies; | |
1048 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1049 | fattr->owner_name = NULL; |
1050 | fattr->group_name = NULL; | |
4704f0e2 | 1051 | } |
ddda8e0a | 1052 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1053 | |
2d36bfde TM |
1054 | struct nfs_fattr *nfs_alloc_fattr(void) |
1055 | { | |
1056 | struct nfs_fattr *fattr; | |
1057 | ||
1058 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1059 | if (fattr != NULL) | |
1060 | nfs_fattr_init(fattr); | |
1061 | return fattr; | |
1062 | } | |
ddda8e0a | 1063 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1064 | |
1065 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1066 | { | |
1067 | struct nfs_fh *fh; | |
1068 | ||
1069 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1070 | if (fh != NULL) | |
1071 | fh->size = 0; | |
1072 | return fh; | |
1073 | } | |
ddda8e0a | 1074 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1075 | |
e27d359e | 1076 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1077 | /* |
1078 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1079 | * in the same way that wireshark does | |
1080 | * | |
1081 | * @fh: file handle | |
1082 | * | |
1083 | * For debugging only. | |
1084 | */ | |
1085 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1086 | { | |
1087 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1088 | * not on the result */ | |
1089 | return ~crc32(0xFFFFFFFF, &fh->data[0], fh->size); | |
1090 | } | |
1091 | ||
1092 | /* | |
20d27e92 CL |
1093 | * _nfs_display_fhandle - display an NFS file handle on the console |
1094 | * | |
1095 | * @fh: file handle to display | |
1096 | * @caption: display caption | |
1097 | * | |
1098 | * For debugging only. | |
1099 | */ | |
20d27e92 CL |
1100 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1101 | { | |
1102 | unsigned short i; | |
1103 | ||
fa68a1ba | 1104 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1105 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1106 | return; | |
1107 | } | |
1108 | ||
d8e0539e WAA |
1109 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1110 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1111 | for (i = 0; i < fh->size; i += 16) { |
1112 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1113 | ||
1114 | switch ((fh->size - i - 1) >> 2) { | |
1115 | case 0: | |
1116 | printk(KERN_DEFAULT " %08x\n", | |
1117 | be32_to_cpup(pos)); | |
1118 | break; | |
1119 | case 1: | |
1120 | printk(KERN_DEFAULT " %08x %08x\n", | |
1121 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1122 | break; | |
1123 | case 2: | |
1124 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1125 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1126 | be32_to_cpup(pos + 2)); | |
1127 | break; | |
1128 | default: | |
1129 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1130 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1131 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1132 | } | |
1133 | } | |
1134 | } | |
1135 | #endif | |
1136 | ||
a10ad176 TM |
1137 | /** |
1138 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1139 | * @inode - pointer to inode | |
1140 | * @fattr - attributes | |
1141 | * | |
1142 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1143 | * attributes got scheduled after another call carrying updated ones. | |
1144 | * | |
1145 | * To do so, the function first assumes that a more recent ctime means | |
1146 | * that the attributes in fattr are newer, however it also attempt to | |
1147 | * catch the case where ctime either didn't change, or went backwards | |
1148 | * (if someone reset the clock on the server) by looking at whether | |
1149 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1150 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1151 | * |
1152 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1153 | * more recent than the ones cached in the inode. | |
1154 | * | |
1155 | */ | |
1156 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1157 | { | |
1158 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1159 | ||
4704f0e2 | 1160 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1161 | nfs_ctime_need_update(inode, fattr) || |
1162 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1163 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1164 | } |
1165 | ||
1166 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1167 | { | |
1168 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1169 | return nfs_update_inode(inode, fattr); |
1170 | return nfs_check_inode_attributes(inode, fattr); | |
1171 | } | |
1172 | ||
33801147 TM |
1173 | /** |
1174 | * nfs_refresh_inode - try to update the inode attribute cache | |
1175 | * @inode - pointer to inode | |
1176 | * @fattr - updated attributes | |
1177 | * | |
1178 | * Check that an RPC call that returned attributes has not overlapped with | |
1179 | * other recent updates of the inode metadata, then decide whether it is | |
1180 | * safe to do a full update of the inode attributes, or whether just to | |
1181 | * call nfs_check_inode_attributes. | |
1182 | */ | |
1183 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1184 | { | |
33801147 TM |
1185 | int status; |
1186 | ||
1187 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1188 | return 0; | |
1189 | spin_lock(&inode->i_lock); | |
870a5be8 | 1190 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1191 | spin_unlock(&inode->i_lock); |
ef79c097 | 1192 | |
33801147 TM |
1193 | return status; |
1194 | } | |
ddda8e0a | 1195 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1196 | |
d65f557f TM |
1197 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1198 | { | |
1199 | struct nfs_inode *nfsi = NFS_I(inode); | |
1200 | ||
1201 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1202 | if (S_ISDIR(inode->i_mode)) | |
1203 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1204 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1205 | return 0; | |
1206 | return nfs_refresh_inode_locked(inode, fattr); | |
1207 | } | |
1208 | ||
decf491f TM |
1209 | /** |
1210 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1211 | * @inode - pointer to inode | |
1212 | * @fattr - updated attributes | |
1213 | * | |
1214 | * After an operation that has changed the inode metadata, mark the | |
1215 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1216 | * |
1217 | * NB: if the server didn't return any post op attributes, this | |
1218 | * function will force the retrieval of attributes before the next | |
1219 | * NFS request. Thus it should be used only for operations that | |
1220 | * are expected to change one or more attributes, to avoid | |
1221 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1222 | */ |
1223 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1224 | { | |
d65f557f | 1225 | int status; |
decf491f | 1226 | |
7668fdbe | 1227 | spin_lock(&inode->i_lock); |
d65f557f | 1228 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1229 | spin_unlock(&inode->i_lock); |
870a5be8 | 1230 | return status; |
decf491f | 1231 | } |
1c606fb7 | 1232 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1233 | |
70ca8852 TM |
1234 | /** |
1235 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1236 | * @inode - pointer to inode | |
1237 | * @fattr - updated attributes | |
1238 | * | |
1239 | * After an operation that has changed the inode metadata, mark the | |
1240 | * attribute cache as being invalid, then try to update it. Fake up | |
1241 | * weak cache consistency data, if none exist. | |
1242 | * | |
1243 | * This function is mainly designed to be used by the ->write_done() functions. | |
1244 | */ | |
1245 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1246 | { | |
d65f557f TM |
1247 | int status; |
1248 | ||
1249 | spin_lock(&inode->i_lock); | |
1250 | /* Don't do a WCC update if these attributes are already stale */ | |
1251 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1252 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1253 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1254 | | NFS_ATTR_FATTR_PRESIZE | |
1255 | | NFS_ATTR_FATTR_PREMTIME | |
1256 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1257 | goto out_noforce; |
1258 | } | |
9e6e70f8 TM |
1259 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1260 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1261 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1262 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1263 | } |
9e6e70f8 TM |
1264 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1265 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1266 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1267 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1268 | } | |
1269 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1270 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1271 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1272 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1273 | } | |
1274 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1275 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1276 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1277 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1278 | } |
d65f557f TM |
1279 | out_noforce: |
1280 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1281 | spin_unlock(&inode->i_lock); | |
1282 | return status; | |
70ca8852 | 1283 | } |
ddda8e0a | 1284 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1285 | |
1da177e4 LT |
1286 | /* |
1287 | * Many nfs protocol calls return the new file attributes after | |
1288 | * an operation. Here we update the inode to reflect the state | |
1289 | * of the server's inode. | |
1290 | * | |
1291 | * This is a bit tricky because we have to make sure all dirty pages | |
1292 | * have been sent off to the server before calling invalidate_inode_pages. | |
1293 | * To make sure no other process adds more write requests while we try | |
1294 | * our best to flush them, we make them sleep during the attribute refresh. | |
1295 | * | |
1296 | * A very similar scenario holds for the dir cache. | |
1297 | */ | |
24aa1fe6 | 1298 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1299 | { |
8b4bdcf8 | 1300 | struct nfs_server *server; |
1da177e4 | 1301 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1302 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1303 | unsigned long invalid = 0; |
3e7d950a | 1304 | unsigned long now = jiffies; |
62ab460c | 1305 | unsigned long save_cache_validity; |
1da177e4 | 1306 | |
4f1abd22 | 1307 | dfprintk(VFS, "NFS: %s(%s/%ld fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1308 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1309 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1310 | atomic_read(&inode->i_count), fattr->valid); |
1311 | ||
e73e6c9e MT |
1312 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1313 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1314 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1315 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1316 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1317 | (long long)fattr->fileid); | |
1318 | goto out_err; | |
1319 | } | |
1da177e4 LT |
1320 | |
1321 | /* | |
1322 | * Make sure the inode's type hasn't changed. | |
1323 | */ | |
e73e6c9e MT |
1324 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1325 | /* | |
1326 | * Big trouble! The inode has become a different object. | |
1327 | */ | |
1328 | printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n", | |
1329 | __func__, inode->i_ino, inode->i_mode, fattr->mode); | |
1330 | goto out_err; | |
1331 | } | |
1da177e4 | 1332 | |
8b4bdcf8 | 1333 | server = NFS_SERVER(inode); |
a0356862 | 1334 | /* Update the fsid? */ |
9e6e70f8 | 1335 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1336 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1337 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1338 | server->fsid = fattr->fsid; |
1339 | ||
1da177e4 LT |
1340 | /* |
1341 | * Update the read time so we don't revalidate too often. | |
1342 | */ | |
33801147 | 1343 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1344 | |
62ab460c TM |
1345 | save_cache_validity = nfsi->cache_validity; |
1346 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1347 | | NFS_INO_INVALID_ATIME | |
1348 | | NFS_INO_REVAL_FORCED | |
1349 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1350 | |
a895b4a1 | 1351 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1352 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1353 | |
47aabaa7 | 1354 | /* More cache consistency checks */ |
9e6e70f8 | 1355 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1356 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1357 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1358 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1359 | invalid |= NFS_INO_INVALID_ATTR |
1360 | | NFS_INO_INVALID_DATA | |
1361 | | NFS_INO_INVALID_ACCESS | |
1362 | | NFS_INO_INVALID_ACL | |
1363 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1364 | if (S_ISDIR(inode->i_mode)) |
1365 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1366 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1367 | } |
62ab460c TM |
1368 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1369 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1370 | |
1371 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1372 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c TM |
1373 | } else if (server->caps & NFS_CAP_MTIME) |
1374 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1375 | | NFS_INO_REVAL_FORCED); |
1376 | ||
9e6e70f8 | 1377 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1378 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c TM |
1379 | } else if (server->caps & NFS_CAP_CTIME) |
1380 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c | 1381 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1382 | |
951a143b | 1383 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1384 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1385 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1386 | cur_isize = i_size_read(inode); | |
1387 | if (new_isize != cur_isize) { | |
1388 | /* Do we perhaps have any outstanding writes, or has | |
1389 | * the file grown beyond our last write? */ | |
0f66b598 PT |
1390 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
1391 | new_isize > cur_isize) { | |
9e6e70f8 TM |
1392 | i_size_write(inode, new_isize); |
1393 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1394 | } | |
60c16ea8 HJ |
1395 | dprintk("NFS: isize change on server for file %s/%ld " |
1396 | "(%Ld to %Ld)\n", | |
1397 | inode->i_sb->s_id, | |
1398 | inode->i_ino, | |
1399 | (long long)cur_isize, | |
1400 | (long long)new_isize); | |
1da177e4 | 1401 | } |
62ab460c TM |
1402 | } else |
1403 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1404 | | NFS_INO_REVAL_PAGECACHE | |
1405 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1406 | |
1da177e4 | 1407 | |
9e6e70f8 TM |
1408 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1409 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1410 | else if (server->caps & NFS_CAP_ATIME) |
1411 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1412 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1413 | |
9e6e70f8 TM |
1414 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1415 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1416 | umode_t newmode = inode->i_mode & S_IFMT; |
1417 | newmode |= fattr->mode & S_IALLUGO; | |
1418 | inode->i_mode = newmode; | |
9e6e70f8 | 1419 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1420 | } |
62ab460c TM |
1421 | } else if (server->caps & NFS_CAP_MODE) |
1422 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1423 | | NFS_INO_INVALID_ACCESS | |
1424 | | NFS_INO_INVALID_ACL | |
1425 | | NFS_INO_REVAL_FORCED); | |
1426 | ||
9e6e70f8 TM |
1427 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1428 | if (inode->i_uid != fattr->uid) { | |
1429 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1430 | inode->i_uid = fattr->uid; | |
1431 | } | |
62ab460c TM |
1432 | } else if (server->caps & NFS_CAP_OWNER) |
1433 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1434 | | NFS_INO_INVALID_ACCESS | |
1435 | | NFS_INO_INVALID_ACL | |
1436 | | NFS_INO_REVAL_FORCED); | |
1437 | ||
9e6e70f8 TM |
1438 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1439 | if (inode->i_gid != fattr->gid) { | |
1440 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1441 | inode->i_gid = fattr->gid; | |
1442 | } | |
62ab460c TM |
1443 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1444 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1445 | | NFS_INO_INVALID_ACCESS | |
1446 | | NFS_INO_INVALID_ACL | |
1447 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1448 | |
9e6e70f8 TM |
1449 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1450 | if (inode->i_nlink != fattr->nlink) { | |
1451 | invalid |= NFS_INO_INVALID_ATTR; | |
1452 | if (S_ISDIR(inode->i_mode)) | |
1453 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1454 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1455 | } |
62ab460c TM |
1456 | } else if (server->caps & NFS_CAP_NLINK) |
1457 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1458 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1459 | |
9e6e70f8 | 1460 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1461 | /* |
1462 | * report the blocks in 512byte units | |
1463 | */ | |
1464 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1465 | } |
9e6e70f8 TM |
1466 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1467 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1468 | |
1469 | /* Update attrtimeo value if we're out of the unstable period */ | |
1470 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1471 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1472 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1473 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1474 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1475 | } else { |
64672d55 | 1476 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1477 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1478 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1479 | nfsi->attrtimeo_timestamp = now; | |
1480 | } | |
1da177e4 | 1481 | } |
f2115dc9 | 1482 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1483 | /* Don't invalidate the data if we were to blame */ |
1484 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1485 | || S_ISLNK(inode->i_mode))) | |
1486 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1487 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1488 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1489 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1490 | |
1491 | return 0; | |
b37b03b7 | 1492 | out_err: |
1da177e4 LT |
1493 | /* |
1494 | * No need to worry about unhashing the dentry, as the | |
1495 | * lookup validation will know that the inode is bad. | |
1496 | * (But we fall through to invalidate the caches.) | |
1497 | */ | |
1498 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1499 | return -ESTALE; |
1500 | } | |
1501 | ||
f7b422b1 | 1502 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1503 | { |
1504 | struct nfs_inode *nfsi; | |
e94b1766 | 1505 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1506 | if (!nfsi) |
1507 | return NULL; | |
55296809 CL |
1508 | nfsi->flags = 0UL; |
1509 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1510 | #ifdef CONFIG_NFS_V3_ACL |
1511 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1512 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1513 | #endif | |
89d77c8f | 1514 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1515 | nfsi->nfs4_acl = NULL; |
1516 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1517 | return &nfsi->vfs_inode; |
1518 | } | |
89d77c8f | 1519 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1520 | |
fa0d7e3d | 1521 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1522 | { |
fa0d7e3d | 1523 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1524 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1525 | } | |
1526 | ||
fa0d7e3d NP |
1527 | void nfs_destroy_inode(struct inode *inode) |
1528 | { | |
1529 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1530 | } | |
89d77c8f | 1531 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1532 | |
d75d5414 AM |
1533 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1534 | { | |
89d77c8f | 1535 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1536 | INIT_LIST_HEAD(&nfsi->open_states); |
1537 | nfsi->delegation = NULL; | |
1538 | nfsi->delegation_state = 0; | |
1539 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1540 | nfsi->layout = NULL; |
d75d5414 AM |
1541 | #endif |
1542 | } | |
f7b422b1 | 1543 | |
51cc5068 | 1544 | static void init_once(void *foo) |
1da177e4 LT |
1545 | { |
1546 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1547 | ||
a35afb83 | 1548 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1549 | INIT_LIST_HEAD(&nfsi->open_files); |
1550 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1551 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1552 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1553 | nfsi->npages = 0; |
ea2cf228 | 1554 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1555 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1556 | atomic_set(&nfsi->silly_count, 1); |
1557 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1558 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1559 | nfs4_init_once(nfsi); |
1da177e4 | 1560 | } |
20c2df83 | 1561 | |
f7b422b1 | 1562 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1563 | { |
1564 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1565 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1566 | 0, (SLAB_RECLAIM_ACCOUNT| |
1567 | SLAB_MEM_SPREAD), | |
20c2df83 | 1568 | init_once); |
1da177e4 LT |
1569 | if (nfs_inode_cachep == NULL) |
1570 | return -ENOMEM; | |
1571 | ||
1572 | return 0; | |
1573 | } | |
1574 | ||
266bee88 | 1575 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1576 | { |
8c0a8537 KS |
1577 | /* |
1578 | * Make sure all delayed rcu free inodes are flushed before we | |
1579 | * destroy cache. | |
1580 | */ | |
1581 | rcu_barrier(); | |
1a1d92c1 | 1582 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1583 | } |
1584 | ||
5746006f | 1585 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1586 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1587 | |
1588 | /* | |
1589 | * start up the nfsiod workqueue | |
1590 | */ | |
1591 | static int nfsiod_start(void) | |
1592 | { | |
1593 | struct workqueue_struct *wq; | |
1594 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1595 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1596 | if (wq == NULL) |
1597 | return -ENOMEM; | |
1598 | nfsiod_workqueue = wq; | |
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | /* | |
1603 | * Destroy the nfsiod workqueue | |
1604 | */ | |
1605 | static void nfsiod_stop(void) | |
1606 | { | |
1607 | struct workqueue_struct *wq; | |
1608 | ||
1609 | wq = nfsiod_workqueue; | |
1610 | if (wq == NULL) | |
1611 | return; | |
1612 | nfsiod_workqueue = NULL; | |
1613 | destroy_workqueue(wq); | |
1614 | } | |
1615 | ||
1b340d01 | 1616 | int nfs_net_id; |
9e2e74db | 1617 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1618 | |
1619 | static int nfs_net_init(struct net *net) | |
1620 | { | |
6b13168b | 1621 | nfs_clients_init(net); |
1b340d01 SK |
1622 | return nfs_dns_resolver_cache_init(net); |
1623 | } | |
1624 | ||
1625 | static void nfs_net_exit(struct net *net) | |
1626 | { | |
1627 | nfs_dns_resolver_cache_destroy(net); | |
28cd1b3f | 1628 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1629 | } |
1630 | ||
1631 | static struct pernet_operations nfs_net_ops = { | |
1632 | .init = nfs_net_init, | |
1633 | .exit = nfs_net_exit, | |
1634 | .id = &nfs_net_id, | |
1635 | .size = sizeof(struct nfs_net), | |
1636 | }; | |
1637 | ||
1da177e4 LT |
1638 | /* |
1639 | * Initialize NFS | |
1640 | */ | |
1641 | static int __init init_nfs_fs(void) | |
1642 | { | |
1643 | int err; | |
1644 | ||
e571cbf1 | 1645 | err = nfs_dns_resolver_init(); |
1b340d01 | 1646 | if (err < 0) |
89d77c8f | 1647 | goto out10;; |
1b340d01 SK |
1648 | |
1649 | err = register_pernet_subsys(&nfs_net_ops); | |
e571cbf1 | 1650 | if (err < 0) |
89d77c8f | 1651 | goto out9; |
e571cbf1 | 1652 | |
8ec442ae DH |
1653 | err = nfs_fscache_register(); |
1654 | if (err < 0) | |
89d77c8f | 1655 | goto out8; |
8ec442ae | 1656 | |
5746006f TM |
1657 | err = nfsiod_start(); |
1658 | if (err) | |
89d77c8f | 1659 | goto out7; |
5746006f | 1660 | |
6aaca566 DH |
1661 | err = nfs_fs_proc_init(); |
1662 | if (err) | |
89d77c8f | 1663 | goto out6; |
6aaca566 | 1664 | |
1da177e4 LT |
1665 | err = nfs_init_nfspagecache(); |
1666 | if (err) | |
89d77c8f | 1667 | goto out5; |
1da177e4 LT |
1668 | |
1669 | err = nfs_init_inodecache(); | |
1670 | if (err) | |
89d77c8f | 1671 | goto out4; |
1da177e4 LT |
1672 | |
1673 | err = nfs_init_readpagecache(); | |
1674 | if (err) | |
89d77c8f | 1675 | goto out3; |
1da177e4 LT |
1676 | |
1677 | err = nfs_init_writepagecache(); | |
1678 | if (err) | |
89d77c8f | 1679 | goto out2; |
1da177e4 | 1680 | |
1da177e4 LT |
1681 | err = nfs_init_directcache(); |
1682 | if (err) | |
89d77c8f | 1683 | goto out1; |
1da177e4 LT |
1684 | |
1685 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1686 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1687 | #endif |
f7b422b1 | 1688 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1689 | goto out0; |
1690 | ||
1da177e4 | 1691 | return 0; |
129d1977 | 1692 | out0: |
1da177e4 | 1693 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1694 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1695 | #endif |
1da177e4 | 1696 | nfs_destroy_directcache(); |
89d77c8f | 1697 | out1: |
129d1977 | 1698 | nfs_destroy_writepagecache(); |
89d77c8f | 1699 | out2: |
129d1977 | 1700 | nfs_destroy_readpagecache(); |
89d77c8f | 1701 | out3: |
129d1977 | 1702 | nfs_destroy_inodecache(); |
89d77c8f | 1703 | out4: |
129d1977 | 1704 | nfs_destroy_nfspagecache(); |
89d77c8f | 1705 | out5: |
129d1977 | 1706 | nfs_fs_proc_exit(); |
89d77c8f | 1707 | out6: |
129d1977 | 1708 | nfsiod_stop(); |
89d77c8f | 1709 | out7: |
129d1977 | 1710 | nfs_fscache_unregister(); |
89d77c8f | 1711 | out8: |
129d1977 | 1712 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 1713 | out9: |
129d1977 | 1714 | nfs_dns_resolver_destroy(); |
89d77c8f | 1715 | out10: |
1da177e4 LT |
1716 | return err; |
1717 | } | |
1718 | ||
1719 | static void __exit exit_nfs_fs(void) | |
1720 | { | |
1da177e4 | 1721 | nfs_destroy_directcache(); |
1da177e4 LT |
1722 | nfs_destroy_writepagecache(); |
1723 | nfs_destroy_readpagecache(); | |
1724 | nfs_destroy_inodecache(); | |
1725 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1726 | nfs_fscache_unregister(); |
1b340d01 | 1727 | unregister_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1728 | nfs_dns_resolver_destroy(); |
1da177e4 | 1729 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1730 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1731 | #endif |
f7b422b1 | 1732 | unregister_nfs_fs(); |
6aaca566 | 1733 | nfs_fs_proc_exit(); |
5746006f | 1734 | nfsiod_stop(); |
1da177e4 LT |
1735 | } |
1736 | ||
1737 | /* Not quite true; I just maintain it */ | |
1738 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1739 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1740 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1741 | |
1742 | module_init(init_nfs_fs) | |
1743 | module_exit(exit_nfs_fs) |