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> | |
35 | #include <linux/nfs_idmap.h> | |
36 | #include <linux/vfs.h> | |
9cdb3883 MN |
37 | #include <linux/inet.h> |
38 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
3fa0b4e2 | 40 | #include <linux/compat.h> |
d310310c | 41 | #include <linux/freezer.h> |
d8e0539e | 42 | #include <linux/crc32.h> |
1da177e4 | 43 | |
1da177e4 LT |
44 | #include <asm/uaccess.h> |
45 | ||
4ce79717 | 46 | #include "nfs4_fs.h" |
a72b4422 | 47 | #include "callback.h" |
1da177e4 | 48 | #include "delegation.h" |
d9ef5a8c | 49 | #include "iostat.h" |
f7b422b1 | 50 | #include "internal.h" |
8ec442ae | 51 | #include "fscache.h" |
e571cbf1 | 52 | #include "dns_resolve.h" |
e5e94017 | 53 | #include "pnfs.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 | } | |
85 | ||
f43bf0be TM |
86 | /** |
87 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
88 | * @fileid: 64-bit fileid | |
89 | * | |
90 | * This function returns a 32-bit inode number if the boot parameter | |
91 | * nfs.enable_ino64 is zero. | |
92 | */ | |
93 | u64 nfs_compat_user_ino64(u64 fileid) | |
94 | { | |
3fa0b4e2 FF |
95 | #ifdef CONFIG_COMPAT |
96 | compat_ulong_t ino; | |
97 | #else | |
98 | unsigned long ino; | |
99 | #endif | |
f43bf0be TM |
100 | |
101 | if (enable_ino64) | |
102 | return fileid; | |
103 | ino = fileid; | |
104 | if (sizeof(ino) < sizeof(fileid)) | |
105 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
106 | return ino; | |
107 | } | |
108 | ||
b57922d9 | 109 | static void nfs_clear_inode(struct inode *inode) |
1da177e4 | 110 | { |
da6d503a TM |
111 | /* |
112 | * The following should never happen... | |
113 | */ | |
114 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 115 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 116 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 117 | nfs_access_zap_cache(inode); |
ef79c097 | 118 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 LT |
119 | } |
120 | ||
b57922d9 AV |
121 | void nfs_evict_inode(struct inode *inode) |
122 | { | |
123 | truncate_inode_pages(&inode->i_data, 0); | |
dbd5768f | 124 | clear_inode(inode); |
b57922d9 AV |
125 | nfs_clear_inode(inode); |
126 | } | |
127 | ||
29884df0 TM |
128 | /** |
129 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
130 | */ | |
131 | int nfs_sync_mapping(struct address_space *mapping) | |
132 | { | |
5cf95214 | 133 | int ret = 0; |
29884df0 | 134 | |
5cf95214 TM |
135 | if (mapping->nrpages != 0) { |
136 | unmap_mapping_range(mapping, 0, 0, 0); | |
137 | ret = nfs_wb_all(mapping->host); | |
138 | } | |
29884df0 TM |
139 | return ret; |
140 | } | |
141 | ||
1da177e4 LT |
142 | /* |
143 | * Invalidate the local caches | |
144 | */ | |
b37b03b7 | 145 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
146 | { |
147 | struct nfs_inode *nfsi = NFS_I(inode); | |
148 | int mode = inode->i_mode; | |
149 | ||
91d5b470 CL |
150 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
151 | ||
c7c20973 TM |
152 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
153 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
154 | |
155 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
156 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 157 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 158 | else |
55296809 | 159 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 160 | } |
dc59250c | 161 | |
b37b03b7 TM |
162 | void nfs_zap_caches(struct inode *inode) |
163 | { | |
164 | spin_lock(&inode->i_lock); | |
165 | nfs_zap_caches_locked(inode); | |
dc59250c | 166 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
167 | } |
168 | ||
cd9ae2b6 TM |
169 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
170 | { | |
171 | if (mapping->nrpages != 0) { | |
172 | spin_lock(&inode->i_lock); | |
173 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
174 | spin_unlock(&inode->i_lock); | |
175 | } | |
176 | } | |
177 | ||
f41f7418 | 178 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
179 | { |
180 | void (*clear_acl_cache)(struct inode *); | |
181 | ||
182 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
183 | if (clear_acl_cache != NULL) | |
184 | clear_acl_cache(inode); | |
dc59250c | 185 | spin_lock(&inode->i_lock); |
55296809 | 186 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 187 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
188 | } |
189 | ||
c4812998 TM |
190 | void nfs_invalidate_atime(struct inode *inode) |
191 | { | |
192 | spin_lock(&inode->i_lock); | |
193 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
194 | spin_unlock(&inode->i_lock); | |
195 | } | |
196 | ||
1da177e4 | 197 | /* |
b37b03b7 TM |
198 | * Invalidate, but do not unhash, the inode. |
199 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 200 | */ |
b37b03b7 | 201 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 202 | { |
3a10c30a | 203 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 204 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
205 | } |
206 | ||
207 | struct nfs_find_desc { | |
208 | struct nfs_fh *fh; | |
209 | struct nfs_fattr *fattr; | |
210 | }; | |
211 | ||
212 | /* | |
213 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
214 | * this, and re-exported directories (also seen in NFSv2) | |
215 | * we are forced to allow 2 different inodes to have the same | |
216 | * i_ino. | |
217 | */ | |
218 | static int | |
219 | nfs_find_actor(struct inode *inode, void *opaque) | |
220 | { | |
221 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
222 | struct nfs_fh *fh = desc->fh; | |
223 | struct nfs_fattr *fattr = desc->fattr; | |
224 | ||
225 | if (NFS_FILEID(inode) != fattr->fileid) | |
226 | return 0; | |
227 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
228 | return 0; | |
229 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
230 | return 0; | |
231 | return 1; | |
232 | } | |
233 | ||
234 | static int | |
235 | nfs_init_locked(struct inode *inode, void *opaque) | |
236 | { | |
237 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
238 | struct nfs_fattr *fattr = desc->fattr; | |
239 | ||
99fadcd7 | 240 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
241 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
242 | return 0; | |
243 | } | |
244 | ||
1da177e4 LT |
245 | /* |
246 | * This is our front-end to iget that looks up inodes by file handle | |
247 | * instead of inode number. | |
248 | */ | |
249 | struct inode * | |
250 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
251 | { | |
252 | struct nfs_find_desc desc = { | |
253 | .fh = fh, | |
254 | .fattr = fattr | |
255 | }; | |
03f28e3a | 256 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
257 | unsigned long hash; |
258 | ||
7ebb9315 BS |
259 | nfs_attr_check_mountpoint(sb, fattr); |
260 | ||
533eb461 AA |
261 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
262 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 263 | goto out_no_inode; |
9e6e70f8 | 264 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 265 | goto out_no_inode; |
1da177e4 LT |
266 | |
267 | hash = nfs_fattr_to_ino_t(fattr); | |
268 | ||
03f28e3a TM |
269 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
270 | if (inode == NULL) { | |
271 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 272 | goto out_no_inode; |
03f28e3a | 273 | } |
1da177e4 LT |
274 | |
275 | if (inode->i_state & I_NEW) { | |
276 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 277 | unsigned long now = jiffies; |
1da177e4 LT |
278 | |
279 | /* We set i_ino for the few things that still rely on it, | |
280 | * such as stat(2) */ | |
281 | inode->i_ino = hash; | |
282 | ||
283 | /* We can't support update_atime(), since the server will reset it */ | |
284 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
285 | inode->i_mode = fattr->mode; | |
62ab460c TM |
286 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
287 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
4124bbc5 | 288 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
289 | /* Why so? Because we want revalidate for devices/FIFOs, and |
290 | * that's precisely what we have in nfs_file_inode_operations. | |
291 | */ | |
8fa5c000 | 292 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 293 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 294 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
295 | inode->i_data.a_ops = &nfs_file_aops; |
296 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
297 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 298 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 299 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 300 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 301 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
302 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
303 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
304 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
305 | inode->i_op = &nfs_referral_inode_operations; | |
306 | else | |
307 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 308 | inode->i_fop = NULL; |
36d43a43 | 309 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 310 | } |
1da177e4 LT |
311 | } else if (S_ISLNK(inode->i_mode)) |
312 | inode->i_op = &nfs_symlink_inode_operations; | |
313 | else | |
314 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
315 | ||
9e6e70f8 TM |
316 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
317 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
318 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 319 | inode->i_version = 0; |
9e6e70f8 | 320 | inode->i_size = 0; |
6d6b77f1 | 321 | clear_nlink(inode); |
9e6e70f8 TM |
322 | inode->i_uid = -2; |
323 | inode->i_gid = -2; | |
324 | inode->i_blocks = 0; | |
325 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
326 | nfsi->write_io = 0; |
327 | nfsi->read_io = 0; | |
9e6e70f8 | 328 | |
33801147 | 329 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 330 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
331 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
332 | inode->i_atime = fattr->atime; | |
62ab460c TM |
333 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
334 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
335 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
336 | inode->i_mtime = fattr->mtime; | |
62ab460c | 337 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
4124bbc5 | 338 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
339 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
340 | inode->i_ctime = fattr->ctime; | |
62ab460c | 341 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
4124bbc5 | 342 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 | 343 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 344 | inode->i_version = fattr->change_attr; |
62ab460c | 345 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
4124bbc5 | 346 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
347 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
348 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
349 | else |
350 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
62ab460c | 351 | | NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 352 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 353 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
354 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
355 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
356 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
357 | inode->i_uid = fattr->uid; | |
62ab460c | 358 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
4124bbc5 | 359 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
360 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
361 | inode->i_gid = fattr->gid; | |
62ab460c | 362 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
4124bbc5 | 363 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
364 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
365 | inode->i_blocks = fattr->du.nfs2.blocks; | |
366 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
367 | /* |
368 | * report the blocks in 512byte units | |
369 | */ | |
370 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
371 | } |
372 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 373 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 374 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 375 | |
ef79c097 DH |
376 | nfs_fscache_init_inode_cookie(inode); |
377 | ||
1da177e4 LT |
378 | unlock_new_inode(inode); |
379 | } else | |
380 | nfs_refresh_inode(inode, fattr); | |
4f1abd22 | 381 | dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n", |
1da177e4 LT |
382 | inode->i_sb->s_id, |
383 | (long long)NFS_FILEID(inode), | |
4f1abd22 | 384 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
385 | atomic_read(&inode->i_count)); |
386 | ||
387 | out: | |
388 | return inode; | |
389 | ||
390 | out_no_inode: | |
03f28e3a | 391 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
392 | goto out; |
393 | } | |
394 | ||
536e43d1 | 395 | #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 |
396 | |
397 | int | |
398 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
399 | { | |
400 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
401 | struct nfs_fattr *fattr; |
402 | int error = -ENOMEM; | |
1da177e4 | 403 | |
91d5b470 CL |
404 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
405 | ||
188b95dd JL |
406 | /* skip mode change if it's just for clearing setuid/setgid */ |
407 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
408 | attr->ia_valid &= ~ATTR_MODE; | |
409 | ||
1da177e4 LT |
410 | if (attr->ia_valid & ATTR_SIZE) { |
411 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
412 | attr->ia_valid &= ~ATTR_SIZE; | |
413 | } | |
414 | ||
415 | /* Optimization: if the end result is no change, don't RPC */ | |
416 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 417 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
418 | return 0; |
419 | ||
755c1e20 | 420 | /* Write all dirty data */ |
1b924e5f | 421 | if (S_ISREG(inode->i_mode)) |
e1552e19 | 422 | nfs_wb_all(inode); |
987f8dfc TM |
423 | |
424 | fattr = nfs_alloc_fattr(); | |
425 | if (fattr == NULL) | |
426 | goto out; | |
642ac549 TM |
427 | /* |
428 | * Return any delegations if we're going to change ACLs | |
429 | */ | |
430 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
431 | nfs_inode_return_delegation(inode); | |
987f8dfc | 432 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 433 | if (error == 0) |
987f8dfc TM |
434 | nfs_refresh_inode(inode, fattr); |
435 | nfs_free_fattr(fattr); | |
436 | out: | |
65e4308d TM |
437 | return error; |
438 | } | |
439 | ||
a3d01454 TM |
440 | /** |
441 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
442 | * @inode: inode of the file used | |
443 | * @offset: file offset to start truncating | |
444 | * | |
445 | * This is a copy of the common vmtruncate, but with the locking | |
446 | * corrected to take into account the fact that NFS requires | |
447 | * inode->i_size to be updated under the inode->i_lock. | |
448 | */ | |
449 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
450 | { | |
c08d3b0e | 451 | loff_t oldsize; |
452 | int err; | |
a3d01454 | 453 | |
c08d3b0e | 454 | err = inode_newsize_ok(inode, offset); |
455 | if (err) | |
456 | goto out; | |
a3d01454 | 457 | |
c08d3b0e | 458 | spin_lock(&inode->i_lock); |
459 | oldsize = inode->i_size; | |
460 | i_size_write(inode, offset); | |
461 | spin_unlock(&inode->i_lock); | |
462 | ||
463 | truncate_pagecache(inode, oldsize, offset); | |
464 | out: | |
465 | return err; | |
a3d01454 TM |
466 | } |
467 | ||
65e4308d TM |
468 | /** |
469 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
470 | * @inode: pointer to struct inode | |
471 | * @attr: pointer to struct iattr | |
472 | * | |
473 | * Note: we do this in the *proc.c in order to ensure that | |
474 | * it works for things like exclusive creates too. | |
475 | */ | |
476 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
477 | { | |
478 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 479 | spin_lock(&inode->i_lock); |
1da177e4 | 480 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
481 | int mode = attr->ia_mode & S_IALLUGO; |
482 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
483 | inode->i_mode = mode; |
484 | } | |
485 | if ((attr->ia_valid & ATTR_UID) != 0) | |
486 | inode->i_uid = attr->ia_uid; | |
487 | if ((attr->ia_valid & ATTR_GID) != 0) | |
488 | inode->i_gid = attr->ia_gid; | |
55296809 | 489 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 490 | spin_unlock(&inode->i_lock); |
65e4308d TM |
491 | } |
492 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 493 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 494 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 495 | } |
1da177e4 LT |
496 | } |
497 | ||
1da177e4 LT |
498 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
499 | { | |
500 | struct inode *inode = dentry->d_inode; | |
55296809 | 501 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
502 | int err; |
503 | ||
acdc53b2 | 504 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 505 | if (S_ISREG(inode->i_mode)) { |
acdc53b2 TM |
506 | err = filemap_write_and_wait(inode->i_mapping); |
507 | if (err) | |
508 | goto out; | |
28c494c5 | 509 | } |
fc33a7bb CH |
510 | |
511 | /* | |
512 | * We may force a getattr if the user cares about atime. | |
513 | * | |
514 | * Note that we only have to check the vfsmount flags here: | |
515 | * - NFS always sets S_NOATIME by so checking it would give a | |
516 | * bogus result | |
517 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
518 | * no point in checking those. | |
519 | */ | |
520 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
521 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 522 | need_atime = 0; |
fc33a7bb | 523 | |
1da177e4 LT |
524 | if (need_atime) |
525 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
526 | else | |
527 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 528 | if (!err) { |
1da177e4 | 529 | generic_fillattr(inode, stat); |
f43bf0be | 530 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 531 | } |
acdc53b2 | 532 | out: |
1da177e4 LT |
533 | return err; |
534 | } | |
535 | ||
f11ac8db TM |
536 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
537 | { | |
538 | atomic_set(&l_ctx->count, 1); | |
539 | l_ctx->lockowner = current->files; | |
540 | l_ctx->pid = current->tgid; | |
541 | INIT_LIST_HEAD(&l_ctx->list); | |
542 | } | |
543 | ||
544 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
545 | { | |
546 | struct nfs_lock_context *pos; | |
547 | ||
548 | list_for_each_entry(pos, &ctx->lock_context.list, list) { | |
549 | if (pos->lockowner != current->files) | |
550 | continue; | |
551 | if (pos->pid != current->tgid) | |
552 | continue; | |
553 | atomic_inc(&pos->count); | |
554 | return pos; | |
555 | } | |
556 | return NULL; | |
557 | } | |
558 | ||
559 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
560 | { | |
561 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 562 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
563 | |
564 | spin_lock(&inode->i_lock); | |
565 | res = __nfs_find_lock_context(ctx); | |
566 | if (res == NULL) { | |
567 | spin_unlock(&inode->i_lock); | |
568 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
569 | if (new == NULL) | |
570 | return NULL; | |
571 | nfs_init_lock_context(new); | |
572 | spin_lock(&inode->i_lock); | |
573 | res = __nfs_find_lock_context(ctx); | |
574 | if (res == NULL) { | |
575 | list_add_tail(&new->list, &ctx->lock_context.list); | |
576 | new->open_context = ctx; | |
577 | res = new; | |
578 | new = NULL; | |
579 | } | |
580 | } | |
581 | spin_unlock(&inode->i_lock); | |
582 | kfree(new); | |
583 | return res; | |
584 | } | |
585 | ||
586 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
587 | { | |
588 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 589 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
590 | |
591 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
592 | return; | |
593 | list_del(&l_ctx->list); | |
594 | spin_unlock(&inode->i_lock); | |
595 | kfree(l_ctx); | |
596 | } | |
597 | ||
7fe5c398 TM |
598 | /** |
599 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
600 | * @ctx: pointer to context | |
601 | * @is_sync: is this a synchronous close | |
602 | * | |
603 | * always ensure that the attributes are up to date if we're mounted | |
604 | * with close-to-open semantics | |
605 | */ | |
606 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
607 | { | |
608 | struct inode *inode; | |
609 | struct nfs_server *server; | |
610 | ||
611 | if (!(ctx->mode & FMODE_WRITE)) | |
612 | return; | |
613 | if (!is_sync) | |
614 | return; | |
3d4ff43d | 615 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
616 | if (!list_empty(&NFS_I(inode)->open_files)) |
617 | return; | |
618 | server = NFS_SERVER(inode); | |
619 | if (server->flags & NFS_MOUNT_NOCTO) | |
620 | return; | |
621 | nfs_revalidate_inode(server, inode); | |
622 | } | |
623 | ||
5ede7b1c | 624 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
625 | { |
626 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
627 | struct rpc_cred *cred = rpc_lookup_cred(); |
628 | if (IS_ERR(cred)) | |
629 | return ERR_CAST(cred); | |
1da177e4 | 630 | |
f52720ca | 631 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
632 | if (!ctx) { |
633 | put_rpccred(cred); | |
634 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 635 | } |
5ede7b1c AV |
636 | nfs_sb_active(dentry->d_sb); |
637 | ctx->dentry = dget(dentry); | |
638 | ctx->cred = cred; | |
639 | ctx->state = NULL; | |
640 | ctx->mode = f_mode; | |
641 | ctx->flags = 0; | |
642 | ctx->error = 0; | |
643 | nfs_init_lock_context(&ctx->lock_context); | |
644 | ctx->lock_context.open_context = ctx; | |
645 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 646 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
647 | return ctx; |
648 | } | |
649 | ||
650 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
651 | { | |
652 | if (ctx != NULL) | |
f11ac8db | 653 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
654 | return ctx; |
655 | } | |
656 | ||
7fe5c398 | 657 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 658 | { |
3d4ff43d AV |
659 | struct inode *inode = ctx->dentry->d_inode; |
660 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 661 | |
5c78f58e | 662 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
663 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
664 | return; | |
665 | list_del(&ctx->list); | |
666 | spin_unlock(&inode->i_lock); | |
ef84303e | 667 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 668 | return; |
5c78f58e TM |
669 | if (inode != NULL) |
670 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
671 | if (ctx->cred != NULL) |
672 | put_rpccred(ctx->cred); | |
3d4ff43d AV |
673 | dput(ctx->dentry); |
674 | nfs_sb_deactive(sb); | |
82be417a | 675 | kfree(ctx->mdsthreshold); |
3bec63db TM |
676 | kfree(ctx); |
677 | } | |
678 | ||
a49c3c77 TM |
679 | void put_nfs_open_context(struct nfs_open_context *ctx) |
680 | { | |
681 | __put_nfs_open_context(ctx, 0); | |
682 | } | |
683 | ||
1da177e4 LT |
684 | /* |
685 | * Ensure that mmap has a recent RPC credential for use when writing out | |
686 | * shared pages | |
687 | */ | |
cd9a1c0e | 688 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 689 | { |
01cce933 | 690 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
691 | struct nfs_inode *nfsi = NFS_I(inode); |
692 | ||
693 | filp->private_data = get_nfs_open_context(ctx); | |
694 | spin_lock(&inode->i_lock); | |
695 | list_add(&ctx->list, &nfsi->open_files); | |
696 | spin_unlock(&inode->i_lock); | |
697 | } | |
698 | ||
d530838b TM |
699 | /* |
700 | * Given an inode, search for an open context with the desired characteristics | |
701 | */ | |
dc0b027d | 702 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
703 | { |
704 | struct nfs_inode *nfsi = NFS_I(inode); | |
705 | struct nfs_open_context *pos, *ctx = NULL; | |
706 | ||
707 | spin_lock(&inode->i_lock); | |
708 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
709 | if (cred != NULL && pos->cred != cred) |
710 | continue; | |
1544fa0f TM |
711 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
712 | continue; | |
713 | ctx = get_nfs_open_context(pos); | |
714 | break; | |
1da177e4 LT |
715 | } |
716 | spin_unlock(&inode->i_lock); | |
717 | return ctx; | |
718 | } | |
719 | ||
b92dccf6 | 720 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 721 | { |
01cce933 | 722 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 723 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
724 | |
725 | if (ctx) { | |
726 | filp->private_data = NULL; | |
727 | spin_lock(&inode->i_lock); | |
728 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
729 | spin_unlock(&inode->i_lock); | |
f895c53f | 730 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
731 | } |
732 | } | |
733 | ||
734 | /* | |
735 | * These allocate and release file read/write context information. | |
736 | */ | |
737 | int nfs_open(struct inode *inode, struct file *filp) | |
738 | { | |
739 | struct nfs_open_context *ctx; | |
1da177e4 | 740 | |
5ede7b1c AV |
741 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
742 | if (IS_ERR(ctx)) | |
743 | return PTR_ERR(ctx); | |
1da177e4 LT |
744 | nfs_file_set_open_context(filp, ctx); |
745 | put_nfs_open_context(ctx); | |
ef79c097 | 746 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
747 | return 0; |
748 | } | |
749 | ||
750 | int nfs_release(struct inode *inode, struct file *filp) | |
751 | { | |
1da177e4 LT |
752 | nfs_file_clear_open_context(filp); |
753 | return 0; | |
754 | } | |
755 | ||
756 | /* | |
757 | * This function is called whenever some part of NFS notices that | |
758 | * the cached attributes have to be refreshed. | |
759 | */ | |
760 | int | |
761 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
762 | { | |
763 | int status = -ESTALE; | |
a3cba2aa | 764 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 765 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
766 | |
767 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
768 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
769 | ||
85233a7a | 770 | if (is_bad_inode(inode)) |
691beb13 | 771 | goto out; |
1da177e4 | 772 | if (NFS_STALE(inode)) |
412d582e | 773 | goto out; |
7fdc49c4 | 774 | |
a3cba2aa TM |
775 | status = -ENOMEM; |
776 | fattr = nfs_alloc_fattr(); | |
777 | if (fattr == NULL) | |
778 | goto out; | |
779 | ||
691beb13 | 780 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 781 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
782 | if (status != 0) { |
783 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
784 | inode->i_sb->s_id, | |
785 | (long long)NFS_FILEID(inode), status); | |
786 | if (status == -ESTALE) { | |
787 | nfs_zap_caches(inode); | |
788 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 789 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
790 | } |
791 | goto out; | |
792 | } | |
793 | ||
a3cba2aa | 794 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
795 | if (status) { |
796 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
797 | inode->i_sb->s_id, | |
798 | (long long)NFS_FILEID(inode), status); | |
799 | goto out; | |
800 | } | |
55296809 | 801 | |
24aa1fe6 | 802 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 803 | nfs_zap_acl_cache(inode); |
55296809 | 804 | |
1da177e4 LT |
805 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
806 | inode->i_sb->s_id, | |
807 | (long long)NFS_FILEID(inode)); | |
808 | ||
412d582e | 809 | out: |
a3cba2aa | 810 | nfs_free_fattr(fattr); |
1da177e4 LT |
811 | return status; |
812 | } | |
813 | ||
814 | int nfs_attribute_timeout(struct inode *inode) | |
815 | { | |
816 | struct nfs_inode *nfsi = NFS_I(inode); | |
817 | ||
d7cf8dd0 TM |
818 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
819 | } | |
820 | ||
821 | static int nfs_attribute_cache_expired(struct inode *inode) | |
822 | { | |
b4d2314b | 823 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 824 | return 0; |
d7cf8dd0 | 825 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
826 | } |
827 | ||
828 | /** | |
829 | * nfs_revalidate_inode - Revalidate the inode attributes | |
830 | * @server - pointer to nfs_server struct | |
831 | * @inode - pointer to inode struct | |
832 | * | |
833 | * Updates inode attribute information by retrieving the data from the server. | |
834 | */ | |
835 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
836 | { | |
44b11874 | 837 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
d7cf8dd0 | 838 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
839 | return NFS_STALE(inode) ? -ESTALE : 0; |
840 | return __nfs_revalidate_inode(server, inode); | |
841 | } | |
842 | ||
1cda707d | 843 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
844 | { |
845 | struct nfs_inode *nfsi = NFS_I(inode); | |
846 | ||
847 | if (mapping->nrpages != 0) { | |
848 | int ret = invalidate_inode_pages2(mapping); | |
849 | if (ret < 0) | |
850 | return ret; | |
851 | } | |
852 | spin_lock(&inode->i_lock); | |
853 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 854 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 855 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
856 | spin_unlock(&inode->i_lock); |
857 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 858 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
859 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
860 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
861 | return 0; | |
862 | } | |
863 | ||
b4b1eadf TM |
864 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
865 | { | |
866 | if (nfs_have_delegated_attributes(inode)) | |
867 | return false; | |
868 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
869 | || nfs_attribute_timeout(inode) | |
870 | || NFS_STALE(inode); | |
871 | } | |
872 | ||
717d44e8 TM |
873 | /** |
874 | * nfs_revalidate_mapping - Revalidate the pagecache | |
875 | * @inode - pointer to host inode | |
876 | * @mapping - pointer to mapping | |
717d44e8 TM |
877 | */ |
878 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
879 | { | |
880 | struct nfs_inode *nfsi = NFS_I(inode); | |
881 | int ret = 0; | |
dc59250c | 882 | |
b4b1eadf | 883 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
884 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
885 | if (ret < 0) | |
886 | goto out; | |
7d52e862 | 887 | } |
717d44e8 TM |
888 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
889 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 890 | out: |
44b11874 | 891 | return ret; |
7d52e862 TM |
892 | } |
893 | ||
27dc1cd3 | 894 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
895 | { |
896 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 897 | unsigned long ret = 0; |
a895b4a1 | 898 | |
9e6e70f8 TM |
899 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
900 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
901 | && inode->i_version == fattr->pre_change_attr) { |
902 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
903 | if (S_ISDIR(inode->i_mode)) |
904 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 905 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 906 | } |
a895b4a1 | 907 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
908 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
909 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
910 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
911 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
912 | ret |= NFS_INO_INVALID_ATTR; | |
913 | } | |
9e6e70f8 TM |
914 | |
915 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
916 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
917 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
918 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
919 | if (S_ISDIR(inode->i_mode)) | |
920 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
921 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 922 | } |
9e6e70f8 TM |
923 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
924 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
925 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
926 | && nfsi->npages == 0) { |
927 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
928 | ret |= NFS_INO_INVALID_ATTR; | |
929 | } | |
930 | return ret; | |
a895b4a1 TM |
931 | } |
932 | ||
1da177e4 | 933 | /** |
33801147 | 934 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
935 | * @inode - pointer to inode |
936 | * @fattr - updated attributes | |
937 | * | |
938 | * Verifies the attribute cache. If we have just changed the attributes, | |
939 | * so that fattr carries weak cache consistency data, then it may | |
940 | * also update the ctime/mtime/change_attribute. | |
941 | */ | |
33801147 | 942 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
943 | { |
944 | struct nfs_inode *nfsi = NFS_I(inode); | |
945 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 946 | unsigned long invalid = 0; |
1da177e4 | 947 | |
dc59250c | 948 | |
01da47bd TM |
949 | if (nfs_have_delegated_attributes(inode)) |
950 | return 0; | |
ca62b9c3 | 951 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
952 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
953 | return -EIO; | |
954 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 955 | return -EIO; |
ca62b9c3 | 956 | |
9e6e70f8 | 957 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 958 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 959 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 960 | |
1da177e4 | 961 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 962 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 963 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 964 | |
9e6e70f8 TM |
965 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
966 | cur_size = i_size_read(inode); | |
967 | new_isize = nfs_size_to_loff_t(fattr->size); | |
968 | if (cur_size != new_isize && nfsi->npages == 0) | |
969 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
970 | } | |
1da177e4 LT |
971 | |
972 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
973 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
974 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
975 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
976 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
977 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 978 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
979 | |
980 | /* Has the link count changed? */ | |
9e6e70f8 | 981 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 982 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 983 | |
9e6e70f8 | 984 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
985 | invalid |= NFS_INO_INVALID_ATIME; |
986 | ||
987 | if (invalid != 0) | |
988 | nfsi->cache_validity |= invalid; | |
1da177e4 | 989 | |
33801147 | 990 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
991 | return 0; |
992 | } | |
993 | ||
a10ad176 | 994 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 995 | { |
9e6e70f8 TM |
996 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
997 | return 0; | |
a10ad176 TM |
998 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
999 | } | |
1000 | ||
1001 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1002 | { | |
9e6e70f8 TM |
1003 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1004 | return 0; | |
a10ad176 TM |
1005 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1006 | } | |
870a5be8 | 1007 | |
ae05f269 | 1008 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1009 | |
1010 | static unsigned long nfs_read_attr_generation_counter(void) | |
1011 | { | |
ae05f269 | 1012 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1013 | } |
1014 | ||
1015 | unsigned long nfs_inc_attr_generation_counter(void) | |
1016 | { | |
ae05f269 | 1017 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1018 | } |
1019 | ||
1020 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1021 | { | |
1022 | fattr->valid = 0; | |
1023 | fattr->time_start = jiffies; | |
1024 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1025 | fattr->owner_name = NULL; |
1026 | fattr->group_name = NULL; | |
4704f0e2 TM |
1027 | } |
1028 | ||
2d36bfde TM |
1029 | struct nfs_fattr *nfs_alloc_fattr(void) |
1030 | { | |
1031 | struct nfs_fattr *fattr; | |
1032 | ||
1033 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1034 | if (fattr != NULL) | |
1035 | nfs_fattr_init(fattr); | |
1036 | return fattr; | |
1037 | } | |
1038 | ||
1039 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1040 | { | |
1041 | struct nfs_fh *fh; | |
1042 | ||
1043 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1044 | if (fh != NULL) | |
1045 | fh->size = 0; | |
1046 | return fh; | |
1047 | } | |
1048 | ||
e27d359e | 1049 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1050 | /* |
1051 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1052 | * in the same way that wireshark does | |
1053 | * | |
1054 | * @fh: file handle | |
1055 | * | |
1056 | * For debugging only. | |
1057 | */ | |
1058 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1059 | { | |
1060 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1061 | * not on the result */ | |
1062 | return ~crc32(0xFFFFFFFF, &fh->data[0], fh->size); | |
1063 | } | |
1064 | ||
1065 | /* | |
20d27e92 CL |
1066 | * _nfs_display_fhandle - display an NFS file handle on the console |
1067 | * | |
1068 | * @fh: file handle to display | |
1069 | * @caption: display caption | |
1070 | * | |
1071 | * For debugging only. | |
1072 | */ | |
20d27e92 CL |
1073 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1074 | { | |
1075 | unsigned short i; | |
1076 | ||
fa68a1ba | 1077 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1078 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1079 | return; | |
1080 | } | |
1081 | ||
d8e0539e WAA |
1082 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1083 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1084 | for (i = 0; i < fh->size; i += 16) { |
1085 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1086 | ||
1087 | switch ((fh->size - i - 1) >> 2) { | |
1088 | case 0: | |
1089 | printk(KERN_DEFAULT " %08x\n", | |
1090 | be32_to_cpup(pos)); | |
1091 | break; | |
1092 | case 1: | |
1093 | printk(KERN_DEFAULT " %08x %08x\n", | |
1094 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1095 | break; | |
1096 | case 2: | |
1097 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1098 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1099 | be32_to_cpup(pos + 2)); | |
1100 | break; | |
1101 | default: | |
1102 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1103 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1104 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1105 | } | |
1106 | } | |
1107 | } | |
1108 | #endif | |
1109 | ||
a10ad176 TM |
1110 | /** |
1111 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1112 | * @inode - pointer to inode | |
1113 | * @fattr - attributes | |
1114 | * | |
1115 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1116 | * attributes got scheduled after another call carrying updated ones. | |
1117 | * | |
1118 | * To do so, the function first assumes that a more recent ctime means | |
1119 | * that the attributes in fattr are newer, however it also attempt to | |
1120 | * catch the case where ctime either didn't change, or went backwards | |
1121 | * (if someone reset the clock on the server) by looking at whether | |
1122 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1123 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1124 | * |
1125 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1126 | * more recent than the ones cached in the inode. | |
1127 | * | |
1128 | */ | |
1129 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1130 | { | |
1131 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1132 | ||
4704f0e2 | 1133 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1134 | nfs_ctime_need_update(inode, fattr) || |
1135 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1136 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1137 | } |
1138 | ||
1139 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1140 | { | |
1141 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1142 | return nfs_update_inode(inode, fattr); |
1143 | return nfs_check_inode_attributes(inode, fattr); | |
1144 | } | |
1145 | ||
33801147 TM |
1146 | /** |
1147 | * nfs_refresh_inode - try to update the inode attribute cache | |
1148 | * @inode - pointer to inode | |
1149 | * @fattr - updated attributes | |
1150 | * | |
1151 | * Check that an RPC call that returned attributes has not overlapped with | |
1152 | * other recent updates of the inode metadata, then decide whether it is | |
1153 | * safe to do a full update of the inode attributes, or whether just to | |
1154 | * call nfs_check_inode_attributes. | |
1155 | */ | |
1156 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1157 | { | |
33801147 TM |
1158 | int status; |
1159 | ||
1160 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1161 | return 0; | |
1162 | spin_lock(&inode->i_lock); | |
870a5be8 | 1163 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1164 | spin_unlock(&inode->i_lock); |
ef79c097 | 1165 | |
33801147 TM |
1166 | return status; |
1167 | } | |
1168 | ||
d65f557f TM |
1169 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1170 | { | |
1171 | struct nfs_inode *nfsi = NFS_I(inode); | |
1172 | ||
1173 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1174 | if (S_ISDIR(inode->i_mode)) | |
1175 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1176 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1177 | return 0; | |
1178 | return nfs_refresh_inode_locked(inode, fattr); | |
1179 | } | |
1180 | ||
decf491f TM |
1181 | /** |
1182 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1183 | * @inode - pointer to inode | |
1184 | * @fattr - updated attributes | |
1185 | * | |
1186 | * After an operation that has changed the inode metadata, mark the | |
1187 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1188 | * |
1189 | * NB: if the server didn't return any post op attributes, this | |
1190 | * function will force the retrieval of attributes before the next | |
1191 | * NFS request. Thus it should be used only for operations that | |
1192 | * are expected to change one or more attributes, to avoid | |
1193 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1194 | */ |
1195 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1196 | { | |
d65f557f | 1197 | int status; |
decf491f | 1198 | |
7668fdbe | 1199 | spin_lock(&inode->i_lock); |
d65f557f | 1200 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1201 | spin_unlock(&inode->i_lock); |
870a5be8 | 1202 | return status; |
decf491f TM |
1203 | } |
1204 | ||
70ca8852 TM |
1205 | /** |
1206 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1207 | * @inode - pointer to inode | |
1208 | * @fattr - updated attributes | |
1209 | * | |
1210 | * After an operation that has changed the inode metadata, mark the | |
1211 | * attribute cache as being invalid, then try to update it. Fake up | |
1212 | * weak cache consistency data, if none exist. | |
1213 | * | |
1214 | * This function is mainly designed to be used by the ->write_done() functions. | |
1215 | */ | |
1216 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1217 | { | |
d65f557f TM |
1218 | int status; |
1219 | ||
1220 | spin_lock(&inode->i_lock); | |
1221 | /* Don't do a WCC update if these attributes are already stale */ | |
1222 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1223 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1224 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1225 | | NFS_ATTR_FATTR_PRESIZE | |
1226 | | NFS_ATTR_FATTR_PREMTIME | |
1227 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1228 | goto out_noforce; |
1229 | } | |
9e6e70f8 TM |
1230 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1231 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1232 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1233 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1234 | } |
9e6e70f8 TM |
1235 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1236 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1237 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1238 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1239 | } | |
1240 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1241 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1242 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1243 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1244 | } | |
1245 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1246 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1247 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1248 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1249 | } |
d65f557f TM |
1250 | out_noforce: |
1251 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1252 | spin_unlock(&inode->i_lock); | |
1253 | return status; | |
70ca8852 TM |
1254 | } |
1255 | ||
1da177e4 LT |
1256 | /* |
1257 | * Many nfs protocol calls return the new file attributes after | |
1258 | * an operation. Here we update the inode to reflect the state | |
1259 | * of the server's inode. | |
1260 | * | |
1261 | * This is a bit tricky because we have to make sure all dirty pages | |
1262 | * have been sent off to the server before calling invalidate_inode_pages. | |
1263 | * To make sure no other process adds more write requests while we try | |
1264 | * our best to flush them, we make them sleep during the attribute refresh. | |
1265 | * | |
1266 | * A very similar scenario holds for the dir cache. | |
1267 | */ | |
24aa1fe6 | 1268 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1269 | { |
8b4bdcf8 | 1270 | struct nfs_server *server; |
1da177e4 | 1271 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1272 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1273 | unsigned long invalid = 0; |
3e7d950a | 1274 | unsigned long now = jiffies; |
62ab460c | 1275 | unsigned long save_cache_validity; |
1da177e4 | 1276 | |
4f1abd22 | 1277 | dfprintk(VFS, "NFS: %s(%s/%ld fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1278 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1279 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1280 | atomic_read(&inode->i_count), fattr->valid); |
1281 | ||
e73e6c9e MT |
1282 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1283 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1284 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1285 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1286 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1287 | (long long)fattr->fileid); | |
1288 | goto out_err; | |
1289 | } | |
1da177e4 LT |
1290 | |
1291 | /* | |
1292 | * Make sure the inode's type hasn't changed. | |
1293 | */ | |
e73e6c9e MT |
1294 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1295 | /* | |
1296 | * Big trouble! The inode has become a different object. | |
1297 | */ | |
1298 | printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n", | |
1299 | __func__, inode->i_ino, inode->i_mode, fattr->mode); | |
1300 | goto out_err; | |
1301 | } | |
1da177e4 | 1302 | |
8b4bdcf8 | 1303 | server = NFS_SERVER(inode); |
a0356862 | 1304 | /* Update the fsid? */ |
9e6e70f8 | 1305 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1306 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1307 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1308 | server->fsid = fattr->fsid; |
1309 | ||
1da177e4 LT |
1310 | /* |
1311 | * Update the read time so we don't revalidate too often. | |
1312 | */ | |
33801147 | 1313 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1314 | |
62ab460c TM |
1315 | save_cache_validity = nfsi->cache_validity; |
1316 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1317 | | NFS_INO_INVALID_ATIME | |
1318 | | NFS_INO_REVAL_FORCED | |
1319 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1320 | |
a895b4a1 | 1321 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1322 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1323 | |
47aabaa7 | 1324 | /* More cache consistency checks */ |
9e6e70f8 | 1325 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1326 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1327 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1328 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1329 | invalid |= NFS_INO_INVALID_ATTR |
1330 | | NFS_INO_INVALID_DATA | |
1331 | | NFS_INO_INVALID_ACCESS | |
1332 | | NFS_INO_INVALID_ACL | |
1333 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1334 | if (S_ISDIR(inode->i_mode)) |
1335 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1336 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1337 | } |
62ab460c TM |
1338 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1339 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1340 | |
1341 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1342 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c TM |
1343 | } else if (server->caps & NFS_CAP_MTIME) |
1344 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1345 | | NFS_INO_REVAL_FORCED); |
1346 | ||
9e6e70f8 | 1347 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1348 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c TM |
1349 | } else if (server->caps & NFS_CAP_CTIME) |
1350 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c | 1351 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1352 | |
951a143b | 1353 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1354 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1355 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1356 | cur_isize = i_size_read(inode); | |
1357 | if (new_isize != cur_isize) { | |
1358 | /* Do we perhaps have any outstanding writes, or has | |
1359 | * the file grown beyond our last write? */ | |
0f66b598 PT |
1360 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
1361 | new_isize > cur_isize) { | |
9e6e70f8 TM |
1362 | i_size_write(inode, new_isize); |
1363 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1364 | } | |
60c16ea8 HJ |
1365 | dprintk("NFS: isize change on server for file %s/%ld " |
1366 | "(%Ld to %Ld)\n", | |
1367 | inode->i_sb->s_id, | |
1368 | inode->i_ino, | |
1369 | (long long)cur_isize, | |
1370 | (long long)new_isize); | |
1da177e4 | 1371 | } |
62ab460c TM |
1372 | } else |
1373 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1374 | | NFS_INO_REVAL_PAGECACHE | |
1375 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1376 | |
1da177e4 | 1377 | |
9e6e70f8 TM |
1378 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1379 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1380 | else if (server->caps & NFS_CAP_ATIME) |
1381 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1382 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1383 | |
9e6e70f8 TM |
1384 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1385 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1386 | umode_t newmode = inode->i_mode & S_IFMT; |
1387 | newmode |= fattr->mode & S_IALLUGO; | |
1388 | inode->i_mode = newmode; | |
9e6e70f8 | 1389 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1390 | } |
62ab460c TM |
1391 | } else if (server->caps & NFS_CAP_MODE) |
1392 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1393 | | NFS_INO_INVALID_ACCESS | |
1394 | | NFS_INO_INVALID_ACL | |
1395 | | NFS_INO_REVAL_FORCED); | |
1396 | ||
9e6e70f8 TM |
1397 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1398 | if (inode->i_uid != fattr->uid) { | |
1399 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1400 | inode->i_uid = fattr->uid; | |
1401 | } | |
62ab460c TM |
1402 | } else if (server->caps & NFS_CAP_OWNER) |
1403 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1404 | | NFS_INO_INVALID_ACCESS | |
1405 | | NFS_INO_INVALID_ACL | |
1406 | | NFS_INO_REVAL_FORCED); | |
1407 | ||
9e6e70f8 TM |
1408 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1409 | if (inode->i_gid != fattr->gid) { | |
1410 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1411 | inode->i_gid = fattr->gid; | |
1412 | } | |
62ab460c TM |
1413 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1414 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1415 | | NFS_INO_INVALID_ACCESS | |
1416 | | NFS_INO_INVALID_ACL | |
1417 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1418 | |
9e6e70f8 TM |
1419 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1420 | if (inode->i_nlink != fattr->nlink) { | |
1421 | invalid |= NFS_INO_INVALID_ATTR; | |
1422 | if (S_ISDIR(inode->i_mode)) | |
1423 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1424 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1425 | } |
62ab460c TM |
1426 | } else if (server->caps & NFS_CAP_NLINK) |
1427 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1428 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1429 | |
9e6e70f8 | 1430 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1431 | /* |
1432 | * report the blocks in 512byte units | |
1433 | */ | |
1434 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1435 | } |
9e6e70f8 TM |
1436 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1437 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1438 | |
1439 | /* Update attrtimeo value if we're out of the unstable period */ | |
1440 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1441 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1442 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1443 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1444 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1445 | } else { |
64672d55 | 1446 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1447 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1448 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1449 | nfsi->attrtimeo_timestamp = now; | |
1450 | } | |
1da177e4 | 1451 | } |
f2115dc9 | 1452 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1453 | /* Don't invalidate the data if we were to blame */ |
1454 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1455 | || S_ISLNK(inode->i_mode))) | |
1456 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce | 1457 | if (!nfs_have_delegation(inode, FMODE_READ) || |
62ab460c | 1458 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1459 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1460 | |
1461 | return 0; | |
b37b03b7 | 1462 | out_err: |
1da177e4 LT |
1463 | /* |
1464 | * No need to worry about unhashing the dentry, as the | |
1465 | * lookup validation will know that the inode is bad. | |
1466 | * (But we fall through to invalidate the caches.) | |
1467 | */ | |
1468 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1469 | return -ESTALE; |
1470 | } | |
1471 | ||
55a97593 | 1472 | |
1da177e4 LT |
1473 | #ifdef CONFIG_NFS_V4 |
1474 | ||
1da177e4 LT |
1475 | /* |
1476 | * Clean out any remaining NFSv4 state that might be left over due | |
1477 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1478 | * nfs_open(). | |
1479 | */ | |
b57922d9 | 1480 | void nfs4_evict_inode(struct inode *inode) |
1da177e4 | 1481 | { |
b57922d9 | 1482 | truncate_inode_pages(&inode->i_data, 0); |
dbd5768f | 1483 | clear_inode(inode); |
cbe82603 BH |
1484 | pnfs_return_layout(inode); |
1485 | pnfs_destroy_layout(NFS_I(inode)); | |
1da177e4 | 1486 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1487 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1488 | /* First call standard NFS clear_inode() code */ |
1489 | nfs_clear_inode(inode); | |
1da177e4 | 1490 | } |
1da177e4 LT |
1491 | #endif |
1492 | ||
f7b422b1 | 1493 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1494 | { |
1495 | struct nfs_inode *nfsi; | |
e94b1766 | 1496 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1497 | if (!nfsi) |
1498 | return NULL; | |
55296809 CL |
1499 | nfsi->flags = 0UL; |
1500 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1501 | #ifdef CONFIG_NFS_V3_ACL |
1502 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1503 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1504 | #endif | |
e50a1c2e BF |
1505 | #ifdef CONFIG_NFS_V4 |
1506 | nfsi->nfs4_acl = NULL; | |
1507 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1508 | return &nfsi->vfs_inode; |
1509 | } | |
1510 | ||
fa0d7e3d | 1511 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1512 | { |
fa0d7e3d | 1513 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1514 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1515 | } | |
1516 | ||
fa0d7e3d NP |
1517 | void nfs_destroy_inode(struct inode *inode) |
1518 | { | |
1519 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1520 | } | |
1521 | ||
d75d5414 AM |
1522 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1523 | { | |
1524 | #ifdef CONFIG_NFS_V4 | |
1525 | INIT_LIST_HEAD(&nfsi->open_states); | |
1526 | nfsi->delegation = NULL; | |
1527 | nfsi->delegation_state = 0; | |
1528 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1529 | nfsi->layout = NULL; |
ea2cf228 | 1530 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
d75d5414 AM |
1531 | #endif |
1532 | } | |
f7b422b1 | 1533 | |
51cc5068 | 1534 | static void init_once(void *foo) |
1da177e4 LT |
1535 | { |
1536 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1537 | ||
a35afb83 | 1538 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1539 | INIT_LIST_HEAD(&nfsi->open_files); |
1540 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1541 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1542 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1543 | nfsi->npages = 0; |
ea2cf228 | 1544 | nfsi->commit_info.ncommit = 0; |
565277f6 TM |
1545 | atomic_set(&nfsi->silly_count, 1); |
1546 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1547 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1548 | nfs4_init_once(nfsi); |
1da177e4 | 1549 | } |
20c2df83 | 1550 | |
f7b422b1 | 1551 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1552 | { |
1553 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1554 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1555 | 0, (SLAB_RECLAIM_ACCOUNT| |
1556 | SLAB_MEM_SPREAD), | |
20c2df83 | 1557 | init_once); |
1da177e4 LT |
1558 | if (nfs_inode_cachep == NULL) |
1559 | return -ENOMEM; | |
1560 | ||
1561 | return 0; | |
1562 | } | |
1563 | ||
266bee88 | 1564 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1565 | { |
1a1d92c1 | 1566 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1567 | } |
1568 | ||
5746006f TM |
1569 | struct workqueue_struct *nfsiod_workqueue; |
1570 | ||
1571 | /* | |
1572 | * start up the nfsiod workqueue | |
1573 | */ | |
1574 | static int nfsiod_start(void) | |
1575 | { | |
1576 | struct workqueue_struct *wq; | |
1577 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1578 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1579 | if (wq == NULL) |
1580 | return -ENOMEM; | |
1581 | nfsiod_workqueue = wq; | |
1582 | return 0; | |
1583 | } | |
1584 | ||
1585 | /* | |
1586 | * Destroy the nfsiod workqueue | |
1587 | */ | |
1588 | static void nfsiod_stop(void) | |
1589 | { | |
1590 | struct workqueue_struct *wq; | |
1591 | ||
1592 | wq = nfsiod_workqueue; | |
1593 | if (wq == NULL) | |
1594 | return; | |
1595 | nfsiod_workqueue = NULL; | |
1596 | destroy_workqueue(wq); | |
1597 | } | |
1598 | ||
1b340d01 | 1599 | int nfs_net_id; |
9e2e74db | 1600 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1601 | |
1602 | static int nfs_net_init(struct net *net) | |
1603 | { | |
6b13168b | 1604 | nfs_clients_init(net); |
1b340d01 SK |
1605 | return nfs_dns_resolver_cache_init(net); |
1606 | } | |
1607 | ||
1608 | static void nfs_net_exit(struct net *net) | |
1609 | { | |
1610 | nfs_dns_resolver_cache_destroy(net); | |
28cd1b3f | 1611 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1612 | } |
1613 | ||
1614 | static struct pernet_operations nfs_net_ops = { | |
1615 | .init = nfs_net_init, | |
1616 | .exit = nfs_net_exit, | |
1617 | .id = &nfs_net_id, | |
1618 | .size = sizeof(struct nfs_net), | |
1619 | }; | |
1620 | ||
1da177e4 LT |
1621 | /* |
1622 | * Initialize NFS | |
1623 | */ | |
1624 | static int __init init_nfs_fs(void) | |
1625 | { | |
1626 | int err; | |
1627 | ||
955a857e BS |
1628 | err = nfs_idmap_init(); |
1629 | if (err < 0) | |
1b340d01 | 1630 | goto out10; |
955a857e | 1631 | |
e571cbf1 | 1632 | err = nfs_dns_resolver_init(); |
1b340d01 SK |
1633 | if (err < 0) |
1634 | goto out9; | |
1635 | ||
1636 | err = register_pernet_subsys(&nfs_net_ops); | |
e571cbf1 TM |
1637 | if (err < 0) |
1638 | goto out8; | |
1639 | ||
8ec442ae DH |
1640 | err = nfs_fscache_register(); |
1641 | if (err < 0) | |
1642 | goto out7; | |
1643 | ||
5746006f TM |
1644 | err = nfsiod_start(); |
1645 | if (err) | |
1646 | goto out6; | |
1647 | ||
6aaca566 DH |
1648 | err = nfs_fs_proc_init(); |
1649 | if (err) | |
1650 | goto out5; | |
1651 | ||
1da177e4 LT |
1652 | err = nfs_init_nfspagecache(); |
1653 | if (err) | |
1654 | goto out4; | |
1655 | ||
1656 | err = nfs_init_inodecache(); | |
1657 | if (err) | |
1658 | goto out3; | |
1659 | ||
1660 | err = nfs_init_readpagecache(); | |
1661 | if (err) | |
1662 | goto out2; | |
1663 | ||
1664 | err = nfs_init_writepagecache(); | |
1665 | if (err) | |
1666 | goto out1; | |
1667 | ||
1da177e4 LT |
1668 | err = nfs_init_directcache(); |
1669 | if (err) | |
1670 | goto out0; | |
1da177e4 LT |
1671 | |
1672 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1673 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1674 | #endif |
f7b422b1 | 1675 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1676 | goto out; |
1677 | return 0; | |
1678 | out: | |
1679 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1680 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1681 | #endif |
1da177e4 | 1682 | nfs_destroy_directcache(); |
6b59a754 | 1683 | out0: |
6b59a754 | 1684 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1685 | out1: |
1686 | nfs_destroy_readpagecache(); | |
1687 | out2: | |
1688 | nfs_destroy_inodecache(); | |
1689 | out3: | |
1690 | nfs_destroy_nfspagecache(); | |
1691 | out4: | |
6aaca566 DH |
1692 | nfs_fs_proc_exit(); |
1693 | out5: | |
5746006f TM |
1694 | nfsiod_stop(); |
1695 | out6: | |
8ec442ae DH |
1696 | nfs_fscache_unregister(); |
1697 | out7: | |
1b340d01 | 1698 | unregister_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1699 | out8: |
1b340d01 | 1700 | nfs_dns_resolver_destroy(); |
955a857e | 1701 | out9: |
1b340d01 SK |
1702 | nfs_idmap_quit(); |
1703 | out10: | |
1da177e4 LT |
1704 | return err; |
1705 | } | |
1706 | ||
1707 | static void __exit exit_nfs_fs(void) | |
1708 | { | |
1da177e4 | 1709 | nfs_destroy_directcache(); |
1da177e4 LT |
1710 | nfs_destroy_writepagecache(); |
1711 | nfs_destroy_readpagecache(); | |
1712 | nfs_destroy_inodecache(); | |
1713 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1714 | nfs_fscache_unregister(); |
1b340d01 | 1715 | unregister_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1716 | nfs_dns_resolver_destroy(); |
955a857e | 1717 | nfs_idmap_quit(); |
1da177e4 | 1718 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1719 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1720 | #endif |
f7b422b1 | 1721 | unregister_nfs_fs(); |
6aaca566 | 1722 | nfs_fs_proc_exit(); |
5746006f | 1723 | nfsiod_stop(); |
1da177e4 LT |
1724 | } |
1725 | ||
1726 | /* Not quite true; I just maintain it */ | |
1727 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1728 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1729 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1730 | |
1731 | module_init(init_nfs_fs) | |
1732 | module_exit(exit_nfs_fs) |