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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/init.h> | |
e8edc6e0 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
1da177e4 | 35 | #include <linux/vfs.h> |
9cdb3883 MN |
36 | #include <linux/inet.h> |
37 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
3fa0b4e2 | 39 | #include <linux/compat.h> |
d310310c | 40 | #include <linux/freezer.h> |
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 | ||
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); |
ef79c097 | 125 | nfs_fscache_release_inode_cookie(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)) { |
55296809 | 165 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
de242c0b DH |
166 | nfs_fscache_invalidate(inode); |
167 | } else { | |
55296809 | 168 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
de242c0b | 169 | } |
b37b03b7 | 170 | } |
dc59250c | 171 | |
b37b03b7 TM |
172 | void nfs_zap_caches(struct inode *inode) |
173 | { | |
174 | spin_lock(&inode->i_lock); | |
175 | nfs_zap_caches_locked(inode); | |
dc59250c | 176 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
177 | } |
178 | ||
cd9ae2b6 TM |
179 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
180 | { | |
181 | if (mapping->nrpages != 0) { | |
182 | spin_lock(&inode->i_lock); | |
183 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
de242c0b | 184 | nfs_fscache_invalidate(inode); |
cd9ae2b6 TM |
185 | spin_unlock(&inode->i_lock); |
186 | } | |
187 | } | |
188 | ||
f41f7418 | 189 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
190 | { |
191 | void (*clear_acl_cache)(struct inode *); | |
192 | ||
193 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
194 | if (clear_acl_cache != NULL) | |
195 | clear_acl_cache(inode); | |
dc59250c | 196 | spin_lock(&inode->i_lock); |
55296809 | 197 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 198 | spin_unlock(&inode->i_lock); |
1da177e4 | 199 | } |
1c606fb7 | 200 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 201 | |
c4812998 TM |
202 | void nfs_invalidate_atime(struct inode *inode) |
203 | { | |
204 | spin_lock(&inode->i_lock); | |
205 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
206 | spin_unlock(&inode->i_lock); | |
207 | } | |
ddda8e0a | 208 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 209 | |
1da177e4 | 210 | /* |
b37b03b7 TM |
211 | * Invalidate, but do not unhash, the inode. |
212 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 213 | */ |
b37b03b7 | 214 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 215 | { |
3a10c30a | 216 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 217 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
218 | } |
219 | ||
220 | struct nfs_find_desc { | |
221 | struct nfs_fh *fh; | |
222 | struct nfs_fattr *fattr; | |
223 | }; | |
224 | ||
225 | /* | |
226 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
227 | * this, and re-exported directories (also seen in NFSv2) | |
228 | * we are forced to allow 2 different inodes to have the same | |
229 | * i_ino. | |
230 | */ | |
231 | static int | |
232 | nfs_find_actor(struct inode *inode, void *opaque) | |
233 | { | |
234 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
235 | struct nfs_fh *fh = desc->fh; | |
236 | struct nfs_fattr *fattr = desc->fattr; | |
237 | ||
238 | if (NFS_FILEID(inode) != fattr->fileid) | |
239 | return 0; | |
f6488c9b JL |
240 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
241 | return 0; | |
1da177e4 LT |
242 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
243 | return 0; | |
244 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
245 | return 0; | |
246 | return 1; | |
247 | } | |
248 | ||
249 | static int | |
250 | nfs_init_locked(struct inode *inode, void *opaque) | |
251 | { | |
252 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
253 | struct nfs_fattr *fattr = desc->fattr; | |
254 | ||
99fadcd7 | 255 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
256 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
257 | return 0; | |
258 | } | |
259 | ||
1da177e4 LT |
260 | /* |
261 | * This is our front-end to iget that looks up inodes by file handle | |
262 | * instead of inode number. | |
263 | */ | |
264 | struct inode * | |
265 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
266 | { | |
267 | struct nfs_find_desc desc = { | |
268 | .fh = fh, | |
269 | .fattr = fattr | |
270 | }; | |
03f28e3a | 271 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
272 | unsigned long hash; |
273 | ||
7ebb9315 BS |
274 | nfs_attr_check_mountpoint(sb, fattr); |
275 | ||
533eb461 AA |
276 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
277 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 278 | goto out_no_inode; |
9e6e70f8 | 279 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 280 | goto out_no_inode; |
1da177e4 LT |
281 | |
282 | hash = nfs_fattr_to_ino_t(fattr); | |
283 | ||
03f28e3a TM |
284 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
285 | if (inode == NULL) { | |
286 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 287 | goto out_no_inode; |
03f28e3a | 288 | } |
1da177e4 LT |
289 | |
290 | if (inode->i_state & I_NEW) { | |
291 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 292 | unsigned long now = jiffies; |
1da177e4 LT |
293 | |
294 | /* We set i_ino for the few things that still rely on it, | |
295 | * such as stat(2) */ | |
296 | inode->i_ino = hash; | |
297 | ||
298 | /* We can't support update_atime(), since the server will reset it */ | |
299 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
300 | inode->i_mode = fattr->mode; | |
62ab460c TM |
301 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
302 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
4124bbc5 | 303 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
304 | /* Why so? Because we want revalidate for devices/FIFOs, and |
305 | * that's precisely what we have in nfs_file_inode_operations. | |
306 | */ | |
8fa5c000 | 307 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 308 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 309 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
310 | inode->i_data.a_ops = &nfs_file_aops; |
311 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
312 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 313 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 314 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 315 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 316 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
317 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
318 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
319 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
320 | inode->i_op = &nfs_referral_inode_operations; | |
321 | else | |
322 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 323 | inode->i_fop = NULL; |
36d43a43 | 324 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 325 | } |
1da177e4 LT |
326 | } else if (S_ISLNK(inode->i_mode)) |
327 | inode->i_op = &nfs_symlink_inode_operations; | |
328 | else | |
329 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
330 | ||
9e6e70f8 TM |
331 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
332 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
333 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 334 | inode->i_version = 0; |
9e6e70f8 | 335 | inode->i_size = 0; |
6d6b77f1 | 336 | clear_nlink(inode); |
9ff593c4 EB |
337 | inode->i_uid = make_kuid(&init_user_ns, -2); |
338 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
339 | inode->i_blocks = 0; |
340 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
341 | nfsi->write_io = 0; |
342 | nfsi->read_io = 0; | |
9e6e70f8 | 343 | |
33801147 | 344 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 345 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
346 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
347 | inode->i_atime = fattr->atime; | |
62ab460c TM |
348 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
349 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
350 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
351 | inode->i_mtime = fattr->mtime; | |
62ab460c | 352 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
4124bbc5 | 353 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
354 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
355 | inode->i_ctime = fattr->ctime; | |
62ab460c | 356 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
4124bbc5 | 357 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 | 358 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 359 | inode->i_version = fattr->change_attr; |
62ab460c | 360 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
4124bbc5 | 361 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
362 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
363 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
364 | else |
365 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
62ab460c | 366 | | NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 367 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 368 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
369 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
370 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
371 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
372 | inode->i_uid = fattr->uid; | |
62ab460c | 373 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
4124bbc5 | 374 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
375 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
376 | inode->i_gid = fattr->gid; | |
62ab460c | 377 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
4124bbc5 | 378 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
379 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
380 | inode->i_blocks = fattr->du.nfs2.blocks; | |
381 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
382 | /* |
383 | * report the blocks in 512byte units | |
384 | */ | |
385 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
386 | } |
387 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 388 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 389 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 390 | |
ef79c097 DH |
391 | nfs_fscache_init_inode_cookie(inode); |
392 | ||
1da177e4 LT |
393 | unlock_new_inode(inode); |
394 | } else | |
395 | nfs_refresh_inode(inode, fattr); | |
4f1abd22 | 396 | dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n", |
1da177e4 LT |
397 | inode->i_sb->s_id, |
398 | (long long)NFS_FILEID(inode), | |
4f1abd22 | 399 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
400 | atomic_read(&inode->i_count)); |
401 | ||
402 | out: | |
403 | return inode; | |
404 | ||
405 | out_no_inode: | |
03f28e3a | 406 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
407 | goto out; |
408 | } | |
89d77c8f | 409 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 410 | |
536e43d1 | 411 | #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 |
412 | |
413 | int | |
414 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
415 | { | |
416 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
417 | struct nfs_fattr *fattr; |
418 | int error = -ENOMEM; | |
1da177e4 | 419 | |
91d5b470 CL |
420 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
421 | ||
188b95dd JL |
422 | /* skip mode change if it's just for clearing setuid/setgid */ |
423 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
424 | attr->ia_valid &= ~ATTR_MODE; | |
425 | ||
1da177e4 LT |
426 | if (attr->ia_valid & ATTR_SIZE) { |
427 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
428 | attr->ia_valid &= ~ATTR_SIZE; | |
429 | } | |
430 | ||
431 | /* Optimization: if the end result is no change, don't RPC */ | |
432 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 433 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
434 | return 0; |
435 | ||
755c1e20 | 436 | /* Write all dirty data */ |
1d59d61f TM |
437 | if (S_ISREG(inode->i_mode)) { |
438 | nfs_inode_dio_wait(inode); | |
e1552e19 | 439 | nfs_wb_all(inode); |
1d59d61f | 440 | } |
987f8dfc TM |
441 | |
442 | fattr = nfs_alloc_fattr(); | |
443 | if (fattr == NULL) | |
444 | goto out; | |
642ac549 TM |
445 | /* |
446 | * Return any delegations if we're going to change ACLs | |
447 | */ | |
448 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 449 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 450 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 451 | if (error == 0) |
987f8dfc TM |
452 | nfs_refresh_inode(inode, fattr); |
453 | nfs_free_fattr(fattr); | |
454 | out: | |
65e4308d TM |
455 | return error; |
456 | } | |
ddda8e0a | 457 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 458 | |
a3d01454 TM |
459 | /** |
460 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
461 | * @inode: inode of the file used | |
462 | * @offset: file offset to start truncating | |
463 | * | |
464 | * This is a copy of the common vmtruncate, but with the locking | |
465 | * corrected to take into account the fact that NFS requires | |
466 | * inode->i_size to be updated under the inode->i_lock. | |
467 | */ | |
468 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
469 | { | |
c08d3b0e | 470 | loff_t oldsize; |
471 | int err; | |
a3d01454 | 472 | |
c08d3b0e | 473 | err = inode_newsize_ok(inode, offset); |
474 | if (err) | |
475 | goto out; | |
a3d01454 | 476 | |
c08d3b0e | 477 | spin_lock(&inode->i_lock); |
478 | oldsize = inode->i_size; | |
479 | i_size_write(inode, offset); | |
480 | spin_unlock(&inode->i_lock); | |
481 | ||
482 | truncate_pagecache(inode, oldsize, offset); | |
483 | out: | |
484 | return err; | |
a3d01454 TM |
485 | } |
486 | ||
65e4308d TM |
487 | /** |
488 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
489 | * @inode: pointer to struct inode | |
490 | * @attr: pointer to struct iattr | |
491 | * | |
492 | * Note: we do this in the *proc.c in order to ensure that | |
493 | * it works for things like exclusive creates too. | |
494 | */ | |
495 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
496 | { | |
497 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 498 | spin_lock(&inode->i_lock); |
1da177e4 | 499 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
500 | int mode = attr->ia_mode & S_IALLUGO; |
501 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
502 | inode->i_mode = mode; |
503 | } | |
504 | if ((attr->ia_valid & ATTR_UID) != 0) | |
505 | inode->i_uid = attr->ia_uid; | |
506 | if ((attr->ia_valid & ATTR_GID) != 0) | |
507 | inode->i_gid = attr->ia_gid; | |
55296809 | 508 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 509 | spin_unlock(&inode->i_lock); |
65e4308d TM |
510 | } |
511 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 512 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 513 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 514 | } |
1da177e4 | 515 | } |
ddda8e0a | 516 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 517 | |
1da177e4 LT |
518 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
519 | { | |
520 | struct inode *inode = dentry->d_inode; | |
55296809 | 521 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
522 | int err; |
523 | ||
acdc53b2 | 524 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 525 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 526 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
527 | err = filemap_write_and_wait(inode->i_mapping); |
528 | if (err) | |
529 | goto out; | |
28c494c5 | 530 | } |
fc33a7bb CH |
531 | |
532 | /* | |
533 | * We may force a getattr if the user cares about atime. | |
534 | * | |
535 | * Note that we only have to check the vfsmount flags here: | |
536 | * - NFS always sets S_NOATIME by so checking it would give a | |
537 | * bogus result | |
538 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
539 | * no point in checking those. | |
540 | */ | |
541 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
542 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 543 | need_atime = 0; |
fc33a7bb | 544 | |
1da177e4 LT |
545 | if (need_atime) |
546 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
547 | else | |
548 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 549 | if (!err) { |
1da177e4 | 550 | generic_fillattr(inode, stat); |
f43bf0be | 551 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 552 | } |
acdc53b2 | 553 | out: |
1da177e4 LT |
554 | return err; |
555 | } | |
ddda8e0a | 556 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 557 | |
f11ac8db TM |
558 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
559 | { | |
560 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
561 | l_ctx->lockowner.l_owner = current->files; |
562 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 563 | INIT_LIST_HEAD(&l_ctx->list); |
577b4232 | 564 | nfs_iocounter_init(&l_ctx->io_count); |
f11ac8db TM |
565 | } |
566 | ||
567 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
568 | { | |
8c86899f TM |
569 | struct nfs_lock_context *head = &ctx->lock_context; |
570 | struct nfs_lock_context *pos = head; | |
f11ac8db | 571 | |
8c86899f | 572 | do { |
2a369153 | 573 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 574 | continue; |
2a369153 | 575 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
576 | continue; |
577 | atomic_inc(&pos->count); | |
578 | return pos; | |
8c86899f | 579 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
580 | return NULL; |
581 | } | |
582 | ||
583 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
584 | { | |
585 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 586 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
587 | |
588 | spin_lock(&inode->i_lock); | |
589 | res = __nfs_find_lock_context(ctx); | |
590 | if (res == NULL) { | |
591 | spin_unlock(&inode->i_lock); | |
592 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
593 | if (new == NULL) | |
b3c54de6 | 594 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
595 | nfs_init_lock_context(new); |
596 | spin_lock(&inode->i_lock); | |
597 | res = __nfs_find_lock_context(ctx); | |
598 | if (res == NULL) { | |
599 | list_add_tail(&new->list, &ctx->lock_context.list); | |
600 | new->open_context = ctx; | |
601 | res = new; | |
602 | new = NULL; | |
603 | } | |
604 | } | |
605 | spin_unlock(&inode->i_lock); | |
606 | kfree(new); | |
607 | return res; | |
608 | } | |
609 | ||
610 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
611 | { | |
612 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 613 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
614 | |
615 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
616 | return; | |
617 | list_del(&l_ctx->list); | |
618 | spin_unlock(&inode->i_lock); | |
619 | kfree(l_ctx); | |
620 | } | |
621 | ||
7fe5c398 TM |
622 | /** |
623 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
624 | * @ctx: pointer to context | |
625 | * @is_sync: is this a synchronous close | |
626 | * | |
627 | * always ensure that the attributes are up to date if we're mounted | |
628 | * with close-to-open semantics | |
629 | */ | |
630 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
631 | { | |
632 | struct inode *inode; | |
633 | struct nfs_server *server; | |
634 | ||
635 | if (!(ctx->mode & FMODE_WRITE)) | |
636 | return; | |
637 | if (!is_sync) | |
638 | return; | |
3d4ff43d | 639 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
640 | if (!list_empty(&NFS_I(inode)->open_files)) |
641 | return; | |
642 | server = NFS_SERVER(inode); | |
643 | if (server->flags & NFS_MOUNT_NOCTO) | |
644 | return; | |
645 | nfs_revalidate_inode(server, inode); | |
646 | } | |
ddda8e0a | 647 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 648 | |
5ede7b1c | 649 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
650 | { |
651 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
652 | struct rpc_cred *cred = rpc_lookup_cred(); |
653 | if (IS_ERR(cred)) | |
654 | return ERR_CAST(cred); | |
1da177e4 | 655 | |
f52720ca | 656 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
657 | if (!ctx) { |
658 | put_rpccred(cred); | |
659 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 660 | } |
5ede7b1c AV |
661 | nfs_sb_active(dentry->d_sb); |
662 | ctx->dentry = dget(dentry); | |
663 | ctx->cred = cred; | |
664 | ctx->state = NULL; | |
665 | ctx->mode = f_mode; | |
666 | ctx->flags = 0; | |
667 | ctx->error = 0; | |
668 | nfs_init_lock_context(&ctx->lock_context); | |
669 | ctx->lock_context.open_context = ctx; | |
670 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 671 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
672 | return ctx; |
673 | } | |
89d77c8f | 674 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
675 | |
676 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
677 | { | |
678 | if (ctx != NULL) | |
f11ac8db | 679 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
680 | return ctx; |
681 | } | |
89d77c8f | 682 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 683 | |
7fe5c398 | 684 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 685 | { |
3d4ff43d AV |
686 | struct inode *inode = ctx->dentry->d_inode; |
687 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 688 | |
5c78f58e | 689 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
690 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
691 | return; | |
692 | list_del(&ctx->list); | |
693 | spin_unlock(&inode->i_lock); | |
ef84303e | 694 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 695 | return; |
5c78f58e TM |
696 | if (inode != NULL) |
697 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
698 | if (ctx->cred != NULL) |
699 | put_rpccred(ctx->cred); | |
3d4ff43d | 700 | dput(ctx->dentry); |
322b2b90 | 701 | nfs_sb_deactive(sb); |
82be417a | 702 | kfree(ctx->mdsthreshold); |
3bec63db TM |
703 | kfree(ctx); |
704 | } | |
705 | ||
a49c3c77 TM |
706 | void put_nfs_open_context(struct nfs_open_context *ctx) |
707 | { | |
708 | __put_nfs_open_context(ctx, 0); | |
709 | } | |
89d77c8f | 710 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 711 | |
1da177e4 LT |
712 | /* |
713 | * Ensure that mmap has a recent RPC credential for use when writing out | |
714 | * shared pages | |
715 | */ | |
cd9a1c0e | 716 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 717 | { |
496ad9aa | 718 | struct inode *inode = file_inode(filp); |
1da177e4 LT |
719 | struct nfs_inode *nfsi = NFS_I(inode); |
720 | ||
721 | filp->private_data = get_nfs_open_context(ctx); | |
722 | spin_lock(&inode->i_lock); | |
723 | list_add(&ctx->list, &nfsi->open_files); | |
724 | spin_unlock(&inode->i_lock); | |
725 | } | |
89d77c8f | 726 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 727 | |
d530838b TM |
728 | /* |
729 | * Given an inode, search for an open context with the desired characteristics | |
730 | */ | |
dc0b027d | 731 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
732 | { |
733 | struct nfs_inode *nfsi = NFS_I(inode); | |
734 | struct nfs_open_context *pos, *ctx = NULL; | |
735 | ||
736 | spin_lock(&inode->i_lock); | |
737 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
738 | if (cred != NULL && pos->cred != cred) |
739 | continue; | |
1544fa0f TM |
740 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
741 | continue; | |
742 | ctx = get_nfs_open_context(pos); | |
743 | break; | |
1da177e4 LT |
744 | } |
745 | spin_unlock(&inode->i_lock); | |
746 | return ctx; | |
747 | } | |
748 | ||
b92dccf6 | 749 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 750 | { |
496ad9aa | 751 | struct inode *inode = file_inode(filp); |
cd3758e3 | 752 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
753 | |
754 | if (ctx) { | |
755 | filp->private_data = NULL; | |
756 | spin_lock(&inode->i_lock); | |
757 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
758 | spin_unlock(&inode->i_lock); | |
f895c53f | 759 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
760 | } |
761 | } | |
762 | ||
763 | /* | |
764 | * These allocate and release file read/write context information. | |
765 | */ | |
766 | int nfs_open(struct inode *inode, struct file *filp) | |
767 | { | |
768 | struct nfs_open_context *ctx; | |
1da177e4 | 769 | |
5ede7b1c AV |
770 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
771 | if (IS_ERR(ctx)) | |
772 | return PTR_ERR(ctx); | |
1da177e4 LT |
773 | nfs_file_set_open_context(filp, ctx); |
774 | put_nfs_open_context(ctx); | |
ef79c097 | 775 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
776 | return 0; |
777 | } | |
778 | ||
779 | int nfs_release(struct inode *inode, struct file *filp) | |
780 | { | |
1da177e4 LT |
781 | nfs_file_clear_open_context(filp); |
782 | return 0; | |
783 | } | |
784 | ||
785 | /* | |
786 | * This function is called whenever some part of NFS notices that | |
787 | * the cached attributes have to be refreshed. | |
788 | */ | |
789 | int | |
790 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
791 | { | |
792 | int status = -ESTALE; | |
a3cba2aa | 793 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 794 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
795 | |
796 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
797 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
798 | ||
85233a7a | 799 | if (is_bad_inode(inode)) |
691beb13 | 800 | goto out; |
1da177e4 | 801 | if (NFS_STALE(inode)) |
412d582e | 802 | goto out; |
7fdc49c4 | 803 | |
a3cba2aa TM |
804 | status = -ENOMEM; |
805 | fattr = nfs_alloc_fattr(); | |
806 | if (fattr == NULL) | |
807 | goto out; | |
808 | ||
691beb13 | 809 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 810 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
811 | if (status != 0) { |
812 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
813 | inode->i_sb->s_id, | |
814 | (long long)NFS_FILEID(inode), status); | |
815 | if (status == -ESTALE) { | |
816 | nfs_zap_caches(inode); | |
817 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 818 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
819 | } |
820 | goto out; | |
821 | } | |
822 | ||
a3cba2aa | 823 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
824 | if (status) { |
825 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
826 | inode->i_sb->s_id, | |
827 | (long long)NFS_FILEID(inode), status); | |
828 | goto out; | |
829 | } | |
55296809 | 830 | |
24aa1fe6 | 831 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 832 | nfs_zap_acl_cache(inode); |
55296809 | 833 | |
1da177e4 LT |
834 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
835 | inode->i_sb->s_id, | |
836 | (long long)NFS_FILEID(inode)); | |
837 | ||
412d582e | 838 | out: |
a3cba2aa | 839 | nfs_free_fattr(fattr); |
1da177e4 LT |
840 | return status; |
841 | } | |
842 | ||
843 | int nfs_attribute_timeout(struct inode *inode) | |
844 | { | |
845 | struct nfs_inode *nfsi = NFS_I(inode); | |
846 | ||
d7cf8dd0 TM |
847 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
848 | } | |
849 | ||
850 | static int nfs_attribute_cache_expired(struct inode *inode) | |
851 | { | |
b4d2314b | 852 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 853 | return 0; |
d7cf8dd0 | 854 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
855 | } |
856 | ||
857 | /** | |
858 | * nfs_revalidate_inode - Revalidate the inode attributes | |
859 | * @server - pointer to nfs_server struct | |
860 | * @inode - pointer to inode struct | |
861 | * | |
862 | * Updates inode attribute information by retrieving the data from the server. | |
863 | */ | |
864 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
865 | { | |
44b11874 | 866 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
d7cf8dd0 | 867 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
868 | return NFS_STALE(inode) ? -ESTALE : 0; |
869 | return __nfs_revalidate_inode(server, inode); | |
870 | } | |
1c606fb7 | 871 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 872 | |
1cda707d | 873 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
874 | { |
875 | struct nfs_inode *nfsi = NFS_I(inode); | |
876 | ||
877 | if (mapping->nrpages != 0) { | |
878 | int ret = invalidate_inode_pages2(mapping); | |
879 | if (ret < 0) | |
880 | return ret; | |
881 | } | |
882 | spin_lock(&inode->i_lock); | |
883 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 884 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 885 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
886 | spin_unlock(&inode->i_lock); |
887 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
de242c0b | 888 | nfs_fscache_wait_on_invalidate(inode); |
717d44e8 TM |
889 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
890 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
891 | return 0; | |
892 | } | |
893 | ||
b4b1eadf TM |
894 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
895 | { | |
896 | if (nfs_have_delegated_attributes(inode)) | |
897 | return false; | |
898 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
899 | || nfs_attribute_timeout(inode) | |
900 | || NFS_STALE(inode); | |
901 | } | |
902 | ||
717d44e8 TM |
903 | /** |
904 | * nfs_revalidate_mapping - Revalidate the pagecache | |
905 | * @inode - pointer to host inode | |
906 | * @mapping - pointer to mapping | |
717d44e8 TM |
907 | */ |
908 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
909 | { | |
910 | struct nfs_inode *nfsi = NFS_I(inode); | |
911 | int ret = 0; | |
dc59250c | 912 | |
29418aa4 MG |
913 | /* swapfiles are not supposed to be shared. */ |
914 | if (IS_SWAPFILE(inode)) | |
915 | goto out; | |
916 | ||
b4b1eadf | 917 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
918 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
919 | if (ret < 0) | |
920 | goto out; | |
7d52e862 | 921 | } |
717d44e8 TM |
922 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
923 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 924 | out: |
44b11874 | 925 | return ret; |
7d52e862 TM |
926 | } |
927 | ||
27dc1cd3 | 928 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
929 | { |
930 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 931 | unsigned long ret = 0; |
a895b4a1 | 932 | |
9e6e70f8 TM |
933 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
934 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
935 | && inode->i_version == fattr->pre_change_attr) { |
936 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
937 | if (S_ISDIR(inode->i_mode)) |
938 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 939 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 940 | } |
a895b4a1 | 941 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
942 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
943 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
944 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
945 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
946 | ret |= NFS_INO_INVALID_ATTR; | |
947 | } | |
9e6e70f8 TM |
948 | |
949 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
950 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
951 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
952 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
953 | if (S_ISDIR(inode->i_mode)) | |
954 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
955 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 956 | } |
9e6e70f8 TM |
957 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
958 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
959 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
960 | && nfsi->npages == 0) { |
961 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
962 | ret |= NFS_INO_INVALID_ATTR; | |
963 | } | |
de242c0b DH |
964 | |
965 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
966 | nfs_fscache_invalidate(inode); | |
967 | ||
27dc1cd3 | 968 | return ret; |
a895b4a1 TM |
969 | } |
970 | ||
1da177e4 | 971 | /** |
33801147 | 972 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
973 | * @inode - pointer to inode |
974 | * @fattr - updated attributes | |
975 | * | |
976 | * Verifies the attribute cache. If we have just changed the attributes, | |
977 | * so that fattr carries weak cache consistency data, then it may | |
978 | * also update the ctime/mtime/change_attribute. | |
979 | */ | |
33801147 | 980 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
981 | { |
982 | struct nfs_inode *nfsi = NFS_I(inode); | |
983 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 984 | unsigned long invalid = 0; |
1da177e4 | 985 | |
dc59250c | 986 | |
01da47bd TM |
987 | if (nfs_have_delegated_attributes(inode)) |
988 | return 0; | |
ca62b9c3 | 989 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
990 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
991 | return -EIO; | |
992 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 993 | return -EIO; |
ca62b9c3 | 994 | |
9e6e70f8 | 995 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 996 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 997 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 998 | |
1da177e4 | 999 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1000 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1001 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1002 | |
9e6e70f8 TM |
1003 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1004 | cur_size = i_size_read(inode); | |
1005 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1006 | if (cur_size != new_isize && nfsi->npages == 0) | |
1007 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1008 | } | |
1da177e4 LT |
1009 | |
1010 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1011 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1012 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1013 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1014 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1015 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1016 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1017 | |
1018 | /* Has the link count changed? */ | |
9e6e70f8 | 1019 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1020 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1021 | |
9e6e70f8 | 1022 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1023 | invalid |= NFS_INO_INVALID_ATIME; |
1024 | ||
1025 | if (invalid != 0) | |
1026 | nfsi->cache_validity |= invalid; | |
1da177e4 | 1027 | |
33801147 | 1028 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1029 | return 0; |
1030 | } | |
1031 | ||
a10ad176 | 1032 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1033 | { |
9e6e70f8 TM |
1034 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1035 | return 0; | |
a10ad176 TM |
1036 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1037 | } | |
1038 | ||
1039 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1040 | { | |
9e6e70f8 TM |
1041 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1042 | return 0; | |
a10ad176 TM |
1043 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1044 | } | |
870a5be8 | 1045 | |
ae05f269 | 1046 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1047 | |
1048 | static unsigned long nfs_read_attr_generation_counter(void) | |
1049 | { | |
ae05f269 | 1050 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1051 | } |
1052 | ||
1053 | unsigned long nfs_inc_attr_generation_counter(void) | |
1054 | { | |
ae05f269 | 1055 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1056 | } |
1057 | ||
1058 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1059 | { | |
1060 | fattr->valid = 0; | |
1061 | fattr->time_start = jiffies; | |
1062 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1063 | fattr->owner_name = NULL; |
1064 | fattr->group_name = NULL; | |
4704f0e2 | 1065 | } |
ddda8e0a | 1066 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1067 | |
2d36bfde TM |
1068 | struct nfs_fattr *nfs_alloc_fattr(void) |
1069 | { | |
1070 | struct nfs_fattr *fattr; | |
1071 | ||
1072 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1073 | if (fattr != NULL) | |
1074 | nfs_fattr_init(fattr); | |
1075 | return fattr; | |
1076 | } | |
ddda8e0a | 1077 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1078 | |
1079 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1080 | { | |
1081 | struct nfs_fh *fh; | |
1082 | ||
1083 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1084 | if (fh != NULL) | |
1085 | fh->size = 0; | |
1086 | return fh; | |
1087 | } | |
ddda8e0a | 1088 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1089 | |
e27d359e | 1090 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1091 | /* |
1092 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1093 | * in the same way that wireshark does | |
1094 | * | |
1095 | * @fh: file handle | |
1096 | * | |
1097 | * For debugging only. | |
1098 | */ | |
1099 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1100 | { | |
1101 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1102 | * not on the result */ | |
1103 | return ~crc32(0xFFFFFFFF, &fh->data[0], fh->size); | |
1104 | } | |
1105 | ||
1106 | /* | |
20d27e92 CL |
1107 | * _nfs_display_fhandle - display an NFS file handle on the console |
1108 | * | |
1109 | * @fh: file handle to display | |
1110 | * @caption: display caption | |
1111 | * | |
1112 | * For debugging only. | |
1113 | */ | |
20d27e92 CL |
1114 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1115 | { | |
1116 | unsigned short i; | |
1117 | ||
fa68a1ba | 1118 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1119 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1120 | return; | |
1121 | } | |
1122 | ||
d8e0539e WAA |
1123 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1124 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1125 | for (i = 0; i < fh->size; i += 16) { |
1126 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1127 | ||
1128 | switch ((fh->size - i - 1) >> 2) { | |
1129 | case 0: | |
1130 | printk(KERN_DEFAULT " %08x\n", | |
1131 | be32_to_cpup(pos)); | |
1132 | break; | |
1133 | case 1: | |
1134 | printk(KERN_DEFAULT " %08x %08x\n", | |
1135 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1136 | break; | |
1137 | case 2: | |
1138 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1139 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1140 | be32_to_cpup(pos + 2)); | |
1141 | break; | |
1142 | default: | |
1143 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1144 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1145 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1146 | } | |
1147 | } | |
1148 | } | |
1149 | #endif | |
1150 | ||
a10ad176 TM |
1151 | /** |
1152 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1153 | * @inode - pointer to inode | |
1154 | * @fattr - attributes | |
1155 | * | |
1156 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1157 | * attributes got scheduled after another call carrying updated ones. | |
1158 | * | |
1159 | * To do so, the function first assumes that a more recent ctime means | |
1160 | * that the attributes in fattr are newer, however it also attempt to | |
1161 | * catch the case where ctime either didn't change, or went backwards | |
1162 | * (if someone reset the clock on the server) by looking at whether | |
1163 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1164 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1165 | * |
1166 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1167 | * more recent than the ones cached in the inode. | |
1168 | * | |
1169 | */ | |
1170 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1171 | { | |
1172 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1173 | ||
4704f0e2 | 1174 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1175 | nfs_ctime_need_update(inode, fattr) || |
1176 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1177 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1178 | } |
1179 | ||
1180 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1181 | { | |
1182 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1183 | return nfs_update_inode(inode, fattr); |
1184 | return nfs_check_inode_attributes(inode, fattr); | |
1185 | } | |
1186 | ||
33801147 TM |
1187 | /** |
1188 | * nfs_refresh_inode - try to update the inode attribute cache | |
1189 | * @inode - pointer to inode | |
1190 | * @fattr - updated attributes | |
1191 | * | |
1192 | * Check that an RPC call that returned attributes has not overlapped with | |
1193 | * other recent updates of the inode metadata, then decide whether it is | |
1194 | * safe to do a full update of the inode attributes, or whether just to | |
1195 | * call nfs_check_inode_attributes. | |
1196 | */ | |
1197 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1198 | { | |
33801147 TM |
1199 | int status; |
1200 | ||
1201 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1202 | return 0; | |
1203 | spin_lock(&inode->i_lock); | |
870a5be8 | 1204 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1205 | spin_unlock(&inode->i_lock); |
ef79c097 | 1206 | |
33801147 TM |
1207 | return status; |
1208 | } | |
ddda8e0a | 1209 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1210 | |
d65f557f TM |
1211 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1212 | { | |
1213 | struct nfs_inode *nfsi = NFS_I(inode); | |
1214 | ||
1215 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
de242c0b | 1216 | if (S_ISDIR(inode->i_mode)) { |
d65f557f | 1217 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
de242c0b DH |
1218 | nfs_fscache_invalidate(inode); |
1219 | } | |
d65f557f TM |
1220 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1221 | return 0; | |
1222 | return nfs_refresh_inode_locked(inode, fattr); | |
1223 | } | |
1224 | ||
decf491f TM |
1225 | /** |
1226 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1227 | * @inode - pointer to inode | |
1228 | * @fattr - updated attributes | |
1229 | * | |
1230 | * After an operation that has changed the inode metadata, mark the | |
1231 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1232 | * |
1233 | * NB: if the server didn't return any post op attributes, this | |
1234 | * function will force the retrieval of attributes before the next | |
1235 | * NFS request. Thus it should be used only for operations that | |
1236 | * are expected to change one or more attributes, to avoid | |
1237 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1238 | */ |
1239 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1240 | { | |
d65f557f | 1241 | int status; |
decf491f | 1242 | |
7668fdbe | 1243 | spin_lock(&inode->i_lock); |
d65f557f | 1244 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1245 | spin_unlock(&inode->i_lock); |
870a5be8 | 1246 | return status; |
decf491f | 1247 | } |
1c606fb7 | 1248 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1249 | |
70ca8852 TM |
1250 | /** |
1251 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1252 | * @inode - pointer to inode | |
1253 | * @fattr - updated attributes | |
1254 | * | |
1255 | * After an operation that has changed the inode metadata, mark the | |
1256 | * attribute cache as being invalid, then try to update it. Fake up | |
1257 | * weak cache consistency data, if none exist. | |
1258 | * | |
1259 | * This function is mainly designed to be used by the ->write_done() functions. | |
1260 | */ | |
1261 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1262 | { | |
d65f557f TM |
1263 | int status; |
1264 | ||
1265 | spin_lock(&inode->i_lock); | |
1266 | /* Don't do a WCC update if these attributes are already stale */ | |
1267 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1268 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1269 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1270 | | NFS_ATTR_FATTR_PRESIZE | |
1271 | | NFS_ATTR_FATTR_PREMTIME | |
1272 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1273 | goto out_noforce; |
1274 | } | |
9e6e70f8 TM |
1275 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1276 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1277 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1278 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1279 | } |
9e6e70f8 TM |
1280 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1281 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1282 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1283 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1284 | } | |
1285 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1286 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1287 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1288 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1289 | } | |
1290 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1291 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1292 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1293 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1294 | } |
d65f557f TM |
1295 | out_noforce: |
1296 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1297 | spin_unlock(&inode->i_lock); | |
1298 | return status; | |
70ca8852 | 1299 | } |
ddda8e0a | 1300 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1301 | |
1da177e4 LT |
1302 | /* |
1303 | * Many nfs protocol calls return the new file attributes after | |
1304 | * an operation. Here we update the inode to reflect the state | |
1305 | * of the server's inode. | |
1306 | * | |
1307 | * This is a bit tricky because we have to make sure all dirty pages | |
1308 | * have been sent off to the server before calling invalidate_inode_pages. | |
1309 | * To make sure no other process adds more write requests while we try | |
1310 | * our best to flush them, we make them sleep during the attribute refresh. | |
1311 | * | |
1312 | * A very similar scenario holds for the dir cache. | |
1313 | */ | |
24aa1fe6 | 1314 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1315 | { |
8b4bdcf8 | 1316 | struct nfs_server *server; |
1da177e4 | 1317 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1318 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1319 | unsigned long invalid = 0; |
3e7d950a | 1320 | unsigned long now = jiffies; |
62ab460c | 1321 | unsigned long save_cache_validity; |
1da177e4 | 1322 | |
4f1abd22 | 1323 | dfprintk(VFS, "NFS: %s(%s/%ld fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1324 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1325 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1326 | atomic_read(&inode->i_count), fattr->valid); |
1327 | ||
e73e6c9e MT |
1328 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1329 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1330 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1331 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1332 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1333 | (long long)fattr->fileid); | |
1334 | goto out_err; | |
1335 | } | |
1da177e4 LT |
1336 | |
1337 | /* | |
1338 | * Make sure the inode's type hasn't changed. | |
1339 | */ | |
e73e6c9e MT |
1340 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1341 | /* | |
1342 | * Big trouble! The inode has become a different object. | |
1343 | */ | |
1344 | printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n", | |
1345 | __func__, inode->i_ino, inode->i_mode, fattr->mode); | |
1346 | goto out_err; | |
1347 | } | |
1da177e4 | 1348 | |
8b4bdcf8 | 1349 | server = NFS_SERVER(inode); |
a0356862 | 1350 | /* Update the fsid? */ |
9e6e70f8 | 1351 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1352 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1353 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1354 | server->fsid = fattr->fsid; |
1355 | ||
1da177e4 LT |
1356 | /* |
1357 | * Update the read time so we don't revalidate too often. | |
1358 | */ | |
33801147 | 1359 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1360 | |
62ab460c TM |
1361 | save_cache_validity = nfsi->cache_validity; |
1362 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1363 | | NFS_INO_INVALID_ATIME | |
1364 | | NFS_INO_REVAL_FORCED | |
1365 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1366 | |
a895b4a1 | 1367 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1368 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1369 | |
47aabaa7 | 1370 | /* More cache consistency checks */ |
9e6e70f8 | 1371 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1372 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1373 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1374 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1375 | invalid |= NFS_INO_INVALID_ATTR |
1376 | | NFS_INO_INVALID_DATA | |
1377 | | NFS_INO_INVALID_ACCESS | |
1378 | | NFS_INO_INVALID_ACL | |
1379 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1380 | if (S_ISDIR(inode->i_mode)) |
1381 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1382 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1383 | } |
62ab460c TM |
1384 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1385 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1386 | |
1387 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1388 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c TM |
1389 | } else if (server->caps & NFS_CAP_MTIME) |
1390 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1391 | | NFS_INO_REVAL_FORCED); |
1392 | ||
9e6e70f8 | 1393 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1394 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c TM |
1395 | } else if (server->caps & NFS_CAP_CTIME) |
1396 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c | 1397 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1398 | |
951a143b | 1399 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1400 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1401 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1402 | cur_isize = i_size_read(inode); | |
1403 | if (new_isize != cur_isize) { | |
1404 | /* Do we perhaps have any outstanding writes, or has | |
1405 | * the file grown beyond our last write? */ | |
0f66b598 PT |
1406 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
1407 | new_isize > cur_isize) { | |
9e6e70f8 TM |
1408 | i_size_write(inode, new_isize); |
1409 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1410 | } | |
60c16ea8 HJ |
1411 | dprintk("NFS: isize change on server for file %s/%ld " |
1412 | "(%Ld to %Ld)\n", | |
1413 | inode->i_sb->s_id, | |
1414 | inode->i_ino, | |
1415 | (long long)cur_isize, | |
1416 | (long long)new_isize); | |
1da177e4 | 1417 | } |
62ab460c TM |
1418 | } else |
1419 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1420 | | NFS_INO_REVAL_PAGECACHE | |
1421 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1422 | |
1da177e4 | 1423 | |
9e6e70f8 TM |
1424 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1425 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1426 | else if (server->caps & NFS_CAP_ATIME) |
1427 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1428 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1429 | |
9e6e70f8 TM |
1430 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1431 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1432 | umode_t newmode = inode->i_mode & S_IFMT; |
1433 | newmode |= fattr->mode & S_IALLUGO; | |
1434 | inode->i_mode = newmode; | |
9e6e70f8 | 1435 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1436 | } |
62ab460c TM |
1437 | } else if (server->caps & NFS_CAP_MODE) |
1438 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1439 | | NFS_INO_INVALID_ACCESS | |
1440 | | NFS_INO_INVALID_ACL | |
1441 | | NFS_INO_REVAL_FORCED); | |
1442 | ||
9e6e70f8 | 1443 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1444 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1445 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1446 | inode->i_uid = fattr->uid; | |
1447 | } | |
62ab460c TM |
1448 | } else if (server->caps & NFS_CAP_OWNER) |
1449 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1450 | | NFS_INO_INVALID_ACCESS | |
1451 | | NFS_INO_INVALID_ACL | |
1452 | | NFS_INO_REVAL_FORCED); | |
1453 | ||
9e6e70f8 | 1454 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1455 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1456 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1457 | inode->i_gid = fattr->gid; | |
1458 | } | |
62ab460c TM |
1459 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1460 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1461 | | NFS_INO_INVALID_ACCESS | |
1462 | | NFS_INO_INVALID_ACL | |
1463 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1464 | |
9e6e70f8 TM |
1465 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1466 | if (inode->i_nlink != fattr->nlink) { | |
1467 | invalid |= NFS_INO_INVALID_ATTR; | |
1468 | if (S_ISDIR(inode->i_mode)) | |
1469 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1470 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1471 | } |
62ab460c TM |
1472 | } else if (server->caps & NFS_CAP_NLINK) |
1473 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1474 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1475 | |
9e6e70f8 | 1476 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1477 | /* |
1478 | * report the blocks in 512byte units | |
1479 | */ | |
1480 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1481 | } |
9e6e70f8 TM |
1482 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1483 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1484 | |
1485 | /* Update attrtimeo value if we're out of the unstable period */ | |
1486 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1487 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1488 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1489 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1490 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1491 | } else { |
64672d55 | 1492 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1493 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1494 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1495 | nfsi->attrtimeo_timestamp = now; | |
1496 | } | |
1da177e4 | 1497 | } |
f2115dc9 | 1498 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1499 | /* Don't invalidate the data if we were to blame */ |
1500 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1501 | || S_ISLNK(inode->i_mode))) | |
1502 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1503 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1504 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1505 | nfsi->cache_validity |= invalid; |
1da177e4 | 1506 | |
de242c0b DH |
1507 | if (invalid & NFS_INO_INVALID_DATA) |
1508 | nfs_fscache_invalidate(inode); | |
1509 | ||
1da177e4 | 1510 | return 0; |
b37b03b7 | 1511 | out_err: |
1da177e4 LT |
1512 | /* |
1513 | * No need to worry about unhashing the dentry, as the | |
1514 | * lookup validation will know that the inode is bad. | |
1515 | * (But we fall through to invalidate the caches.) | |
1516 | */ | |
1517 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1518 | return -ESTALE; |
1519 | } | |
1520 | ||
f7b422b1 | 1521 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1522 | { |
1523 | struct nfs_inode *nfsi; | |
e94b1766 | 1524 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1525 | if (!nfsi) |
1526 | return NULL; | |
55296809 CL |
1527 | nfsi->flags = 0UL; |
1528 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1529 | #ifdef CONFIG_NFS_V3_ACL |
1530 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1531 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1532 | #endif | |
89d77c8f | 1533 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1534 | nfsi->nfs4_acl = NULL; |
1535 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1536 | return &nfsi->vfs_inode; |
1537 | } | |
89d77c8f | 1538 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1539 | |
fa0d7e3d | 1540 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1541 | { |
fa0d7e3d | 1542 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1543 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1544 | } | |
1545 | ||
fa0d7e3d NP |
1546 | void nfs_destroy_inode(struct inode *inode) |
1547 | { | |
1548 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1549 | } | |
89d77c8f | 1550 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1551 | |
d75d5414 AM |
1552 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1553 | { | |
89d77c8f | 1554 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1555 | INIT_LIST_HEAD(&nfsi->open_states); |
1556 | nfsi->delegation = NULL; | |
1557 | nfsi->delegation_state = 0; | |
1558 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1559 | nfsi->layout = NULL; |
d75d5414 AM |
1560 | #endif |
1561 | } | |
f7b422b1 | 1562 | |
51cc5068 | 1563 | static void init_once(void *foo) |
1da177e4 LT |
1564 | { |
1565 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1566 | ||
a35afb83 | 1567 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1568 | INIT_LIST_HEAD(&nfsi->open_files); |
1569 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1570 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1571 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1572 | nfsi->npages = 0; |
ea2cf228 | 1573 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1574 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1575 | atomic_set(&nfsi->silly_count, 1); |
1576 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1577 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1578 | nfs4_init_once(nfsi); |
1da177e4 | 1579 | } |
20c2df83 | 1580 | |
f7b422b1 | 1581 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1582 | { |
1583 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1584 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1585 | 0, (SLAB_RECLAIM_ACCOUNT| |
1586 | SLAB_MEM_SPREAD), | |
20c2df83 | 1587 | init_once); |
1da177e4 LT |
1588 | if (nfs_inode_cachep == NULL) |
1589 | return -ENOMEM; | |
1590 | ||
1591 | return 0; | |
1592 | } | |
1593 | ||
266bee88 | 1594 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1595 | { |
8c0a8537 KS |
1596 | /* |
1597 | * Make sure all delayed rcu free inodes are flushed before we | |
1598 | * destroy cache. | |
1599 | */ | |
1600 | rcu_barrier(); | |
1a1d92c1 | 1601 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1602 | } |
1603 | ||
5746006f | 1604 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1605 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1606 | |
1607 | /* | |
1608 | * start up the nfsiod workqueue | |
1609 | */ | |
1610 | static int nfsiod_start(void) | |
1611 | { | |
1612 | struct workqueue_struct *wq; | |
1613 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1614 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1615 | if (wq == NULL) |
1616 | return -ENOMEM; | |
1617 | nfsiod_workqueue = wq; | |
1618 | return 0; | |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * Destroy the nfsiod workqueue | |
1623 | */ | |
1624 | static void nfsiod_stop(void) | |
1625 | { | |
1626 | struct workqueue_struct *wq; | |
1627 | ||
1628 | wq = nfsiod_workqueue; | |
1629 | if (wq == NULL) | |
1630 | return; | |
1631 | nfsiod_workqueue = NULL; | |
1632 | destroy_workqueue(wq); | |
1633 | } | |
1634 | ||
1b340d01 | 1635 | int nfs_net_id; |
9e2e74db | 1636 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1637 | |
1638 | static int nfs_net_init(struct net *net) | |
1639 | { | |
6b13168b | 1640 | nfs_clients_init(net); |
1b340d01 SK |
1641 | return nfs_dns_resolver_cache_init(net); |
1642 | } | |
1643 | ||
1644 | static void nfs_net_exit(struct net *net) | |
1645 | { | |
1646 | nfs_dns_resolver_cache_destroy(net); | |
28cd1b3f | 1647 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1648 | } |
1649 | ||
1650 | static struct pernet_operations nfs_net_ops = { | |
1651 | .init = nfs_net_init, | |
1652 | .exit = nfs_net_exit, | |
1653 | .id = &nfs_net_id, | |
1654 | .size = sizeof(struct nfs_net), | |
1655 | }; | |
1656 | ||
1da177e4 LT |
1657 | /* |
1658 | * Initialize NFS | |
1659 | */ | |
1660 | static int __init init_nfs_fs(void) | |
1661 | { | |
1662 | int err; | |
1663 | ||
e571cbf1 | 1664 | err = nfs_dns_resolver_init(); |
1b340d01 | 1665 | if (err < 0) |
89d77c8f | 1666 | goto out10;; |
1b340d01 SK |
1667 | |
1668 | err = register_pernet_subsys(&nfs_net_ops); | |
e571cbf1 | 1669 | if (err < 0) |
89d77c8f | 1670 | goto out9; |
e571cbf1 | 1671 | |
8ec442ae DH |
1672 | err = nfs_fscache_register(); |
1673 | if (err < 0) | |
89d77c8f | 1674 | goto out8; |
8ec442ae | 1675 | |
5746006f TM |
1676 | err = nfsiod_start(); |
1677 | if (err) | |
89d77c8f | 1678 | goto out7; |
5746006f | 1679 | |
6aaca566 DH |
1680 | err = nfs_fs_proc_init(); |
1681 | if (err) | |
89d77c8f | 1682 | goto out6; |
6aaca566 | 1683 | |
1da177e4 LT |
1684 | err = nfs_init_nfspagecache(); |
1685 | if (err) | |
89d77c8f | 1686 | goto out5; |
1da177e4 LT |
1687 | |
1688 | err = nfs_init_inodecache(); | |
1689 | if (err) | |
89d77c8f | 1690 | goto out4; |
1da177e4 LT |
1691 | |
1692 | err = nfs_init_readpagecache(); | |
1693 | if (err) | |
89d77c8f | 1694 | goto out3; |
1da177e4 LT |
1695 | |
1696 | err = nfs_init_writepagecache(); | |
1697 | if (err) | |
89d77c8f | 1698 | goto out2; |
1da177e4 | 1699 | |
1da177e4 LT |
1700 | err = nfs_init_directcache(); |
1701 | if (err) | |
89d77c8f | 1702 | goto out1; |
1da177e4 LT |
1703 | |
1704 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1705 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1706 | #endif |
f7b422b1 | 1707 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1708 | goto out0; |
1709 | ||
1da177e4 | 1710 | return 0; |
129d1977 | 1711 | out0: |
1da177e4 | 1712 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1713 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1714 | #endif |
1da177e4 | 1715 | nfs_destroy_directcache(); |
89d77c8f | 1716 | out1: |
129d1977 | 1717 | nfs_destroy_writepagecache(); |
89d77c8f | 1718 | out2: |
129d1977 | 1719 | nfs_destroy_readpagecache(); |
89d77c8f | 1720 | out3: |
129d1977 | 1721 | nfs_destroy_inodecache(); |
89d77c8f | 1722 | out4: |
129d1977 | 1723 | nfs_destroy_nfspagecache(); |
89d77c8f | 1724 | out5: |
129d1977 | 1725 | nfs_fs_proc_exit(); |
89d77c8f | 1726 | out6: |
129d1977 | 1727 | nfsiod_stop(); |
89d77c8f | 1728 | out7: |
129d1977 | 1729 | nfs_fscache_unregister(); |
89d77c8f | 1730 | out8: |
129d1977 | 1731 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 1732 | out9: |
129d1977 | 1733 | nfs_dns_resolver_destroy(); |
89d77c8f | 1734 | out10: |
1da177e4 LT |
1735 | return err; |
1736 | } | |
1737 | ||
1738 | static void __exit exit_nfs_fs(void) | |
1739 | { | |
1da177e4 | 1740 | nfs_destroy_directcache(); |
1da177e4 LT |
1741 | nfs_destroy_writepagecache(); |
1742 | nfs_destroy_readpagecache(); | |
1743 | nfs_destroy_inodecache(); | |
1744 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1745 | nfs_fscache_unregister(); |
1b340d01 | 1746 | unregister_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1747 | nfs_dns_resolver_destroy(); |
1da177e4 | 1748 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1749 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1750 | #endif |
f7b422b1 | 1751 | unregister_nfs_fs(); |
6aaca566 | 1752 | nfs_fs_proc_exit(); |
5746006f | 1753 | nfsiod_stop(); |
1da177e4 LT |
1754 | } |
1755 | ||
1756 | /* Not quite true; I just maintain it */ | |
1757 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1758 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1759 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1760 | |
1761 | module_init(init_nfs_fs) | |
1762 | module_exit(exit_nfs_fs) |