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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" |
1b340d01 | 53 | #include "netns.h" |
1da177e4 LT |
54 | |
55 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 56 | |
f43bf0be TM |
57 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
58 | ||
59 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 60 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 61 | |
1da177e4 | 62 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 63 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 64 | |
e18b890b | 65 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 66 | |
1da177e4 LT |
67 | static inline unsigned long |
68 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
69 | { | |
70 | return nfs_fileid_to_ino_t(fattr->fileid); | |
71 | } | |
72 | ||
72cb77f4 TM |
73 | /** |
74 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
75 | * @word: long word containing the bit lock | |
76 | */ | |
77 | int nfs_wait_bit_killable(void *word) | |
78 | { | |
79 | if (fatal_signal_pending(current)) | |
80 | return -ERESTARTSYS; | |
d310310c | 81 | freezable_schedule(); |
72cb77f4 TM |
82 | return 0; |
83 | } | |
84 | ||
f43bf0be TM |
85 | /** |
86 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
87 | * @fileid: 64-bit fileid | |
88 | * | |
89 | * This function returns a 32-bit inode number if the boot parameter | |
90 | * nfs.enable_ino64 is zero. | |
91 | */ | |
92 | u64 nfs_compat_user_ino64(u64 fileid) | |
93 | { | |
3fa0b4e2 FF |
94 | #ifdef CONFIG_COMPAT |
95 | compat_ulong_t ino; | |
96 | #else | |
97 | unsigned long ino; | |
98 | #endif | |
f43bf0be TM |
99 | |
100 | if (enable_ino64) | |
101 | return fileid; | |
102 | ino = fileid; | |
103 | if (sizeof(ino) < sizeof(fileid)) | |
104 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
105 | return ino; | |
106 | } | |
107 | ||
b57922d9 | 108 | static void nfs_clear_inode(struct inode *inode) |
1da177e4 | 109 | { |
da6d503a TM |
110 | /* |
111 | * The following should never happen... | |
112 | */ | |
113 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 114 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 115 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 116 | nfs_access_zap_cache(inode); |
ef79c097 | 117 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 LT |
118 | } |
119 | ||
b57922d9 AV |
120 | void nfs_evict_inode(struct inode *inode) |
121 | { | |
122 | truncate_inode_pages(&inode->i_data, 0); | |
dbd5768f | 123 | clear_inode(inode); |
b57922d9 AV |
124 | nfs_clear_inode(inode); |
125 | } | |
126 | ||
29884df0 TM |
127 | /** |
128 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
129 | */ | |
130 | int nfs_sync_mapping(struct address_space *mapping) | |
131 | { | |
5cf95214 | 132 | int ret = 0; |
29884df0 | 133 | |
5cf95214 TM |
134 | if (mapping->nrpages != 0) { |
135 | unmap_mapping_range(mapping, 0, 0, 0); | |
136 | ret = nfs_wb_all(mapping->host); | |
137 | } | |
29884df0 TM |
138 | return ret; |
139 | } | |
140 | ||
1da177e4 LT |
141 | /* |
142 | * Invalidate the local caches | |
143 | */ | |
b37b03b7 | 144 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
145 | { |
146 | struct nfs_inode *nfsi = NFS_I(inode); | |
147 | int mode = inode->i_mode; | |
148 | ||
91d5b470 CL |
149 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
150 | ||
c7c20973 TM |
151 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
152 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
153 | |
154 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
155 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 156 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 157 | else |
55296809 | 158 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 159 | } |
dc59250c | 160 | |
b37b03b7 TM |
161 | void nfs_zap_caches(struct inode *inode) |
162 | { | |
163 | spin_lock(&inode->i_lock); | |
164 | nfs_zap_caches_locked(inode); | |
dc59250c | 165 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
166 | } |
167 | ||
cd9ae2b6 TM |
168 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
169 | { | |
170 | if (mapping->nrpages != 0) { | |
171 | spin_lock(&inode->i_lock); | |
172 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
173 | spin_unlock(&inode->i_lock); | |
174 | } | |
175 | } | |
176 | ||
f41f7418 | 177 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
178 | { |
179 | void (*clear_acl_cache)(struct inode *); | |
180 | ||
181 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
182 | if (clear_acl_cache != NULL) | |
183 | clear_acl_cache(inode); | |
dc59250c | 184 | spin_lock(&inode->i_lock); |
55296809 | 185 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 186 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
187 | } |
188 | ||
c4812998 TM |
189 | void nfs_invalidate_atime(struct inode *inode) |
190 | { | |
191 | spin_lock(&inode->i_lock); | |
192 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
193 | spin_unlock(&inode->i_lock); | |
194 | } | |
195 | ||
1da177e4 | 196 | /* |
b37b03b7 TM |
197 | * Invalidate, but do not unhash, the inode. |
198 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 199 | */ |
b37b03b7 | 200 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 201 | { |
3a10c30a | 202 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 203 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
204 | } |
205 | ||
206 | struct nfs_find_desc { | |
207 | struct nfs_fh *fh; | |
208 | struct nfs_fattr *fattr; | |
209 | }; | |
210 | ||
211 | /* | |
212 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
213 | * this, and re-exported directories (also seen in NFSv2) | |
214 | * we are forced to allow 2 different inodes to have the same | |
215 | * i_ino. | |
216 | */ | |
217 | static int | |
218 | nfs_find_actor(struct inode *inode, void *opaque) | |
219 | { | |
220 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
221 | struct nfs_fh *fh = desc->fh; | |
222 | struct nfs_fattr *fattr = desc->fattr; | |
223 | ||
224 | if (NFS_FILEID(inode) != fattr->fileid) | |
225 | return 0; | |
226 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
227 | return 0; | |
228 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
229 | return 0; | |
230 | return 1; | |
231 | } | |
232 | ||
233 | static int | |
234 | nfs_init_locked(struct inode *inode, void *opaque) | |
235 | { | |
236 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
237 | struct nfs_fattr *fattr = desc->fattr; | |
238 | ||
99fadcd7 | 239 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
240 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
241 | return 0; | |
242 | } | |
243 | ||
1da177e4 LT |
244 | /* |
245 | * This is our front-end to iget that looks up inodes by file handle | |
246 | * instead of inode number. | |
247 | */ | |
248 | struct inode * | |
249 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
250 | { | |
251 | struct nfs_find_desc desc = { | |
252 | .fh = fh, | |
253 | .fattr = fattr | |
254 | }; | |
03f28e3a | 255 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
256 | unsigned long hash; |
257 | ||
7ebb9315 BS |
258 | nfs_attr_check_mountpoint(sb, fattr); |
259 | ||
533eb461 AA |
260 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
261 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 262 | goto out_no_inode; |
9e6e70f8 | 263 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 264 | goto out_no_inode; |
1da177e4 LT |
265 | |
266 | hash = nfs_fattr_to_ino_t(fattr); | |
267 | ||
03f28e3a TM |
268 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
269 | if (inode == NULL) { | |
270 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 271 | goto out_no_inode; |
03f28e3a | 272 | } |
1da177e4 LT |
273 | |
274 | if (inode->i_state & I_NEW) { | |
275 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 276 | unsigned long now = jiffies; |
1da177e4 LT |
277 | |
278 | /* We set i_ino for the few things that still rely on it, | |
279 | * such as stat(2) */ | |
280 | inode->i_ino = hash; | |
281 | ||
282 | /* We can't support update_atime(), since the server will reset it */ | |
283 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
284 | inode->i_mode = fattr->mode; | |
62ab460c TM |
285 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
286 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
4124bbc5 | 287 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
288 | /* Why so? Because we want revalidate for devices/FIFOs, and |
289 | * that's precisely what we have in nfs_file_inode_operations. | |
290 | */ | |
8fa5c000 | 291 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 292 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 293 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
294 | inode->i_data.a_ops = &nfs_file_aops; |
295 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
296 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 297 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 298 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 299 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 300 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
301 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
302 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
303 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
304 | inode->i_op = &nfs_referral_inode_operations; | |
305 | else | |
306 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 307 | inode->i_fop = NULL; |
36d43a43 | 308 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 309 | } |
1da177e4 LT |
310 | } else if (S_ISLNK(inode->i_mode)) |
311 | inode->i_op = &nfs_symlink_inode_operations; | |
312 | else | |
313 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
314 | ||
9e6e70f8 TM |
315 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
316 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
317 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 318 | inode->i_version = 0; |
9e6e70f8 | 319 | inode->i_size = 0; |
6d6b77f1 | 320 | clear_nlink(inode); |
9e6e70f8 TM |
321 | inode->i_uid = -2; |
322 | inode->i_gid = -2; | |
323 | inode->i_blocks = 0; | |
324 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
325 | nfsi->write_io = 0; |
326 | nfsi->read_io = 0; | |
9e6e70f8 | 327 | |
33801147 | 328 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 329 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
330 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
331 | inode->i_atime = fattr->atime; | |
62ab460c TM |
332 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
333 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
334 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
335 | inode->i_mtime = fattr->mtime; | |
62ab460c | 336 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
4124bbc5 | 337 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
338 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
339 | inode->i_ctime = fattr->ctime; | |
62ab460c | 340 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
4124bbc5 | 341 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 | 342 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 343 | inode->i_version = fattr->change_attr; |
62ab460c | 344 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
4124bbc5 | 345 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
346 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
347 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
348 | else |
349 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
62ab460c | 350 | | NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 351 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 352 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
353 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
354 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
355 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
356 | inode->i_uid = fattr->uid; | |
62ab460c | 357 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
4124bbc5 | 358 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
359 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
360 | inode->i_gid = fattr->gid; | |
62ab460c | 361 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
4124bbc5 | 362 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
363 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
364 | inode->i_blocks = fattr->du.nfs2.blocks; | |
365 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
366 | /* |
367 | * report the blocks in 512byte units | |
368 | */ | |
369 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
370 | } |
371 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 372 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 373 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 374 | |
ef79c097 DH |
375 | nfs_fscache_init_inode_cookie(inode); |
376 | ||
1da177e4 LT |
377 | unlock_new_inode(inode); |
378 | } else | |
379 | nfs_refresh_inode(inode, fattr); | |
4f1abd22 | 380 | dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n", |
1da177e4 LT |
381 | inode->i_sb->s_id, |
382 | (long long)NFS_FILEID(inode), | |
4f1abd22 | 383 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
384 | atomic_read(&inode->i_count)); |
385 | ||
386 | out: | |
387 | return inode; | |
388 | ||
389 | out_no_inode: | |
03f28e3a | 390 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
391 | goto out; |
392 | } | |
393 | ||
536e43d1 | 394 | #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 |
395 | |
396 | int | |
397 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
398 | { | |
399 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
400 | struct nfs_fattr *fattr; |
401 | int error = -ENOMEM; | |
1da177e4 | 402 | |
91d5b470 CL |
403 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
404 | ||
188b95dd JL |
405 | /* skip mode change if it's just for clearing setuid/setgid */ |
406 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
407 | attr->ia_valid &= ~ATTR_MODE; | |
408 | ||
1da177e4 LT |
409 | if (attr->ia_valid & ATTR_SIZE) { |
410 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
411 | attr->ia_valid &= ~ATTR_SIZE; | |
412 | } | |
413 | ||
414 | /* Optimization: if the end result is no change, don't RPC */ | |
415 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 416 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
417 | return 0; |
418 | ||
755c1e20 | 419 | /* Write all dirty data */ |
1d59d61f TM |
420 | if (S_ISREG(inode->i_mode)) { |
421 | nfs_inode_dio_wait(inode); | |
e1552e19 | 422 | nfs_wb_all(inode); |
1d59d61f | 423 | } |
987f8dfc TM |
424 | |
425 | fattr = nfs_alloc_fattr(); | |
426 | if (fattr == NULL) | |
427 | goto out; | |
642ac549 TM |
428 | /* |
429 | * Return any delegations if we're going to change ACLs | |
430 | */ | |
431 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 432 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 433 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 434 | if (error == 0) |
987f8dfc TM |
435 | nfs_refresh_inode(inode, fattr); |
436 | nfs_free_fattr(fattr); | |
437 | out: | |
65e4308d TM |
438 | return error; |
439 | } | |
440 | ||
a3d01454 TM |
441 | /** |
442 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
443 | * @inode: inode of the file used | |
444 | * @offset: file offset to start truncating | |
445 | * | |
446 | * This is a copy of the common vmtruncate, but with the locking | |
447 | * corrected to take into account the fact that NFS requires | |
448 | * inode->i_size to be updated under the inode->i_lock. | |
449 | */ | |
450 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
451 | { | |
c08d3b0e | 452 | loff_t oldsize; |
453 | int err; | |
a3d01454 | 454 | |
c08d3b0e | 455 | err = inode_newsize_ok(inode, offset); |
456 | if (err) | |
457 | goto out; | |
a3d01454 | 458 | |
c08d3b0e | 459 | spin_lock(&inode->i_lock); |
460 | oldsize = inode->i_size; | |
461 | i_size_write(inode, offset); | |
462 | spin_unlock(&inode->i_lock); | |
463 | ||
464 | truncate_pagecache(inode, oldsize, offset); | |
465 | out: | |
466 | return err; | |
a3d01454 TM |
467 | } |
468 | ||
65e4308d TM |
469 | /** |
470 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
471 | * @inode: pointer to struct inode | |
472 | * @attr: pointer to struct iattr | |
473 | * | |
474 | * Note: we do this in the *proc.c in order to ensure that | |
475 | * it works for things like exclusive creates too. | |
476 | */ | |
477 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
478 | { | |
479 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 480 | spin_lock(&inode->i_lock); |
1da177e4 | 481 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
482 | int mode = attr->ia_mode & S_IALLUGO; |
483 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
484 | inode->i_mode = mode; |
485 | } | |
486 | if ((attr->ia_valid & ATTR_UID) != 0) | |
487 | inode->i_uid = attr->ia_uid; | |
488 | if ((attr->ia_valid & ATTR_GID) != 0) | |
489 | inode->i_gid = attr->ia_gid; | |
55296809 | 490 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 491 | spin_unlock(&inode->i_lock); |
65e4308d TM |
492 | } |
493 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 494 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 495 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 496 | } |
1da177e4 LT |
497 | } |
498 | ||
1da177e4 LT |
499 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
500 | { | |
501 | struct inode *inode = dentry->d_inode; | |
55296809 | 502 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
503 | int err; |
504 | ||
acdc53b2 | 505 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 506 | if (S_ISREG(inode->i_mode)) { |
1d59d61f | 507 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
508 | err = filemap_write_and_wait(inode->i_mapping); |
509 | if (err) | |
510 | goto out; | |
28c494c5 | 511 | } |
fc33a7bb CH |
512 | |
513 | /* | |
514 | * We may force a getattr if the user cares about atime. | |
515 | * | |
516 | * Note that we only have to check the vfsmount flags here: | |
517 | * - NFS always sets S_NOATIME by so checking it would give a | |
518 | * bogus result | |
519 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
520 | * no point in checking those. | |
521 | */ | |
522 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
523 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 524 | need_atime = 0; |
fc33a7bb | 525 | |
1da177e4 LT |
526 | if (need_atime) |
527 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
528 | else | |
529 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 530 | if (!err) { |
1da177e4 | 531 | generic_fillattr(inode, stat); |
f43bf0be | 532 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 533 | } |
acdc53b2 | 534 | out: |
1da177e4 LT |
535 | return err; |
536 | } | |
537 | ||
f11ac8db TM |
538 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
539 | { | |
540 | atomic_set(&l_ctx->count, 1); | |
541 | l_ctx->lockowner = current->files; | |
542 | l_ctx->pid = current->tgid; | |
543 | INIT_LIST_HEAD(&l_ctx->list); | |
544 | } | |
545 | ||
546 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
547 | { | |
548 | struct nfs_lock_context *pos; | |
549 | ||
550 | list_for_each_entry(pos, &ctx->lock_context.list, list) { | |
551 | if (pos->lockowner != current->files) | |
552 | continue; | |
553 | if (pos->pid != current->tgid) | |
554 | continue; | |
555 | atomic_inc(&pos->count); | |
556 | return pos; | |
557 | } | |
558 | return NULL; | |
559 | } | |
560 | ||
561 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
562 | { | |
563 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 564 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
565 | |
566 | spin_lock(&inode->i_lock); | |
567 | res = __nfs_find_lock_context(ctx); | |
568 | if (res == NULL) { | |
569 | spin_unlock(&inode->i_lock); | |
570 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
571 | if (new == NULL) | |
572 | return NULL; | |
573 | nfs_init_lock_context(new); | |
574 | spin_lock(&inode->i_lock); | |
575 | res = __nfs_find_lock_context(ctx); | |
576 | if (res == NULL) { | |
577 | list_add_tail(&new->list, &ctx->lock_context.list); | |
578 | new->open_context = ctx; | |
579 | res = new; | |
580 | new = NULL; | |
581 | } | |
582 | } | |
583 | spin_unlock(&inode->i_lock); | |
584 | kfree(new); | |
585 | return res; | |
586 | } | |
587 | ||
588 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
589 | { | |
590 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 591 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
592 | |
593 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
594 | return; | |
595 | list_del(&l_ctx->list); | |
596 | spin_unlock(&inode->i_lock); | |
597 | kfree(l_ctx); | |
598 | } | |
599 | ||
7fe5c398 TM |
600 | /** |
601 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
602 | * @ctx: pointer to context | |
603 | * @is_sync: is this a synchronous close | |
604 | * | |
605 | * always ensure that the attributes are up to date if we're mounted | |
606 | * with close-to-open semantics | |
607 | */ | |
608 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
609 | { | |
610 | struct inode *inode; | |
611 | struct nfs_server *server; | |
612 | ||
613 | if (!(ctx->mode & FMODE_WRITE)) | |
614 | return; | |
615 | if (!is_sync) | |
616 | return; | |
3d4ff43d | 617 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
618 | if (!list_empty(&NFS_I(inode)->open_files)) |
619 | return; | |
620 | server = NFS_SERVER(inode); | |
621 | if (server->flags & NFS_MOUNT_NOCTO) | |
622 | return; | |
623 | nfs_revalidate_inode(server, inode); | |
624 | } | |
625 | ||
5ede7b1c | 626 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
627 | { |
628 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
629 | struct rpc_cred *cred = rpc_lookup_cred(); |
630 | if (IS_ERR(cred)) | |
631 | return ERR_CAST(cred); | |
1da177e4 | 632 | |
f52720ca | 633 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
634 | if (!ctx) { |
635 | put_rpccred(cred); | |
636 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 637 | } |
5ede7b1c AV |
638 | nfs_sb_active(dentry->d_sb); |
639 | ctx->dentry = dget(dentry); | |
640 | ctx->cred = cred; | |
641 | ctx->state = NULL; | |
642 | ctx->mode = f_mode; | |
643 | ctx->flags = 0; | |
644 | ctx->error = 0; | |
645 | nfs_init_lock_context(&ctx->lock_context); | |
646 | ctx->lock_context.open_context = ctx; | |
647 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 648 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
649 | return ctx; |
650 | } | |
651 | ||
652 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
653 | { | |
654 | if (ctx != NULL) | |
f11ac8db | 655 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
656 | return ctx; |
657 | } | |
658 | ||
7fe5c398 | 659 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 660 | { |
3d4ff43d AV |
661 | struct inode *inode = ctx->dentry->d_inode; |
662 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 663 | |
5c78f58e | 664 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
665 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
666 | return; | |
667 | list_del(&ctx->list); | |
668 | spin_unlock(&inode->i_lock); | |
ef84303e | 669 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 670 | return; |
5c78f58e TM |
671 | if (inode != NULL) |
672 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
673 | if (ctx->cred != NULL) |
674 | put_rpccred(ctx->cred); | |
3d4ff43d AV |
675 | dput(ctx->dentry); |
676 | nfs_sb_deactive(sb); | |
82be417a | 677 | kfree(ctx->mdsthreshold); |
3bec63db TM |
678 | kfree(ctx); |
679 | } | |
680 | ||
a49c3c77 TM |
681 | void put_nfs_open_context(struct nfs_open_context *ctx) |
682 | { | |
683 | __put_nfs_open_context(ctx, 0); | |
684 | } | |
685 | ||
1da177e4 LT |
686 | /* |
687 | * Ensure that mmap has a recent RPC credential for use when writing out | |
688 | * shared pages | |
689 | */ | |
cd9a1c0e | 690 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 691 | { |
01cce933 | 692 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
693 | struct nfs_inode *nfsi = NFS_I(inode); |
694 | ||
695 | filp->private_data = get_nfs_open_context(ctx); | |
696 | spin_lock(&inode->i_lock); | |
697 | list_add(&ctx->list, &nfsi->open_files); | |
698 | spin_unlock(&inode->i_lock); | |
699 | } | |
700 | ||
d530838b TM |
701 | /* |
702 | * Given an inode, search for an open context with the desired characteristics | |
703 | */ | |
dc0b027d | 704 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
705 | { |
706 | struct nfs_inode *nfsi = NFS_I(inode); | |
707 | struct nfs_open_context *pos, *ctx = NULL; | |
708 | ||
709 | spin_lock(&inode->i_lock); | |
710 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
711 | if (cred != NULL && pos->cred != cred) |
712 | continue; | |
1544fa0f TM |
713 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
714 | continue; | |
715 | ctx = get_nfs_open_context(pos); | |
716 | break; | |
1da177e4 LT |
717 | } |
718 | spin_unlock(&inode->i_lock); | |
719 | return ctx; | |
720 | } | |
721 | ||
b92dccf6 | 722 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 723 | { |
01cce933 | 724 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 725 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
726 | |
727 | if (ctx) { | |
728 | filp->private_data = NULL; | |
729 | spin_lock(&inode->i_lock); | |
730 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
731 | spin_unlock(&inode->i_lock); | |
f895c53f | 732 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
733 | } |
734 | } | |
735 | ||
736 | /* | |
737 | * These allocate and release file read/write context information. | |
738 | */ | |
739 | int nfs_open(struct inode *inode, struct file *filp) | |
740 | { | |
741 | struct nfs_open_context *ctx; | |
1da177e4 | 742 | |
5ede7b1c AV |
743 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
744 | if (IS_ERR(ctx)) | |
745 | return PTR_ERR(ctx); | |
1da177e4 LT |
746 | nfs_file_set_open_context(filp, ctx); |
747 | put_nfs_open_context(ctx); | |
ef79c097 | 748 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
749 | return 0; |
750 | } | |
751 | ||
752 | int nfs_release(struct inode *inode, struct file *filp) | |
753 | { | |
1da177e4 LT |
754 | nfs_file_clear_open_context(filp); |
755 | return 0; | |
756 | } | |
757 | ||
758 | /* | |
759 | * This function is called whenever some part of NFS notices that | |
760 | * the cached attributes have to be refreshed. | |
761 | */ | |
762 | int | |
763 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
764 | { | |
765 | int status = -ESTALE; | |
a3cba2aa | 766 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 767 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
768 | |
769 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
770 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
771 | ||
85233a7a | 772 | if (is_bad_inode(inode)) |
691beb13 | 773 | goto out; |
1da177e4 | 774 | if (NFS_STALE(inode)) |
412d582e | 775 | goto out; |
7fdc49c4 | 776 | |
a3cba2aa TM |
777 | status = -ENOMEM; |
778 | fattr = nfs_alloc_fattr(); | |
779 | if (fattr == NULL) | |
780 | goto out; | |
781 | ||
691beb13 | 782 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 783 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
784 | if (status != 0) { |
785 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
786 | inode->i_sb->s_id, | |
787 | (long long)NFS_FILEID(inode), status); | |
788 | if (status == -ESTALE) { | |
789 | nfs_zap_caches(inode); | |
790 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 791 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
792 | } |
793 | goto out; | |
794 | } | |
795 | ||
a3cba2aa | 796 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
797 | if (status) { |
798 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
799 | inode->i_sb->s_id, | |
800 | (long long)NFS_FILEID(inode), status); | |
801 | goto out; | |
802 | } | |
55296809 | 803 | |
24aa1fe6 | 804 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 805 | nfs_zap_acl_cache(inode); |
55296809 | 806 | |
1da177e4 LT |
807 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
808 | inode->i_sb->s_id, | |
809 | (long long)NFS_FILEID(inode)); | |
810 | ||
412d582e | 811 | out: |
a3cba2aa | 812 | nfs_free_fattr(fattr); |
1da177e4 LT |
813 | return status; |
814 | } | |
815 | ||
816 | int nfs_attribute_timeout(struct inode *inode) | |
817 | { | |
818 | struct nfs_inode *nfsi = NFS_I(inode); | |
819 | ||
d7cf8dd0 TM |
820 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
821 | } | |
822 | ||
823 | static int nfs_attribute_cache_expired(struct inode *inode) | |
824 | { | |
b4d2314b | 825 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 826 | return 0; |
d7cf8dd0 | 827 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
828 | } |
829 | ||
830 | /** | |
831 | * nfs_revalidate_inode - Revalidate the inode attributes | |
832 | * @server - pointer to nfs_server struct | |
833 | * @inode - pointer to inode struct | |
834 | * | |
835 | * Updates inode attribute information by retrieving the data from the server. | |
836 | */ | |
837 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
838 | { | |
44b11874 | 839 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
d7cf8dd0 | 840 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
841 | return NFS_STALE(inode) ? -ESTALE : 0; |
842 | return __nfs_revalidate_inode(server, inode); | |
843 | } | |
844 | ||
1cda707d | 845 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
846 | { |
847 | struct nfs_inode *nfsi = NFS_I(inode); | |
848 | ||
849 | if (mapping->nrpages != 0) { | |
850 | int ret = invalidate_inode_pages2(mapping); | |
851 | if (ret < 0) | |
852 | return ret; | |
853 | } | |
854 | spin_lock(&inode->i_lock); | |
855 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 856 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 857 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
858 | spin_unlock(&inode->i_lock); |
859 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 860 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
861 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
862 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
863 | return 0; | |
864 | } | |
865 | ||
b4b1eadf TM |
866 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
867 | { | |
868 | if (nfs_have_delegated_attributes(inode)) | |
869 | return false; | |
870 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
871 | || nfs_attribute_timeout(inode) | |
872 | || NFS_STALE(inode); | |
873 | } | |
874 | ||
717d44e8 TM |
875 | /** |
876 | * nfs_revalidate_mapping - Revalidate the pagecache | |
877 | * @inode - pointer to host inode | |
878 | * @mapping - pointer to mapping | |
717d44e8 TM |
879 | */ |
880 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
881 | { | |
882 | struct nfs_inode *nfsi = NFS_I(inode); | |
883 | int ret = 0; | |
dc59250c | 884 | |
b4b1eadf | 885 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
886 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
887 | if (ret < 0) | |
888 | goto out; | |
7d52e862 | 889 | } |
717d44e8 TM |
890 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
891 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 892 | out: |
44b11874 | 893 | return ret; |
7d52e862 TM |
894 | } |
895 | ||
27dc1cd3 | 896 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
897 | { |
898 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 899 | unsigned long ret = 0; |
a895b4a1 | 900 | |
9e6e70f8 TM |
901 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
902 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
903 | && inode->i_version == fattr->pre_change_attr) { |
904 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
905 | if (S_ISDIR(inode->i_mode)) |
906 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 907 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 908 | } |
a895b4a1 | 909 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
910 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
911 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
912 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
913 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
914 | ret |= NFS_INO_INVALID_ATTR; | |
915 | } | |
9e6e70f8 TM |
916 | |
917 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
918 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
919 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
920 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
921 | if (S_ISDIR(inode->i_mode)) | |
922 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
923 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 924 | } |
9e6e70f8 TM |
925 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
926 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
927 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
928 | && nfsi->npages == 0) { |
929 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
930 | ret |= NFS_INO_INVALID_ATTR; | |
931 | } | |
932 | return ret; | |
a895b4a1 TM |
933 | } |
934 | ||
1da177e4 | 935 | /** |
33801147 | 936 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
937 | * @inode - pointer to inode |
938 | * @fattr - updated attributes | |
939 | * | |
940 | * Verifies the attribute cache. If we have just changed the attributes, | |
941 | * so that fattr carries weak cache consistency data, then it may | |
942 | * also update the ctime/mtime/change_attribute. | |
943 | */ | |
33801147 | 944 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
945 | { |
946 | struct nfs_inode *nfsi = NFS_I(inode); | |
947 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 948 | unsigned long invalid = 0; |
1da177e4 | 949 | |
dc59250c | 950 | |
01da47bd TM |
951 | if (nfs_have_delegated_attributes(inode)) |
952 | return 0; | |
ca62b9c3 | 953 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
954 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
955 | return -EIO; | |
956 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 957 | return -EIO; |
ca62b9c3 | 958 | |
9e6e70f8 | 959 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 960 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 961 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 962 | |
1da177e4 | 963 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 964 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 965 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 966 | |
9e6e70f8 TM |
967 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
968 | cur_size = i_size_read(inode); | |
969 | new_isize = nfs_size_to_loff_t(fattr->size); | |
970 | if (cur_size != new_isize && nfsi->npages == 0) | |
971 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
972 | } | |
1da177e4 LT |
973 | |
974 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
975 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
976 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
977 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
978 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
979 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 980 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
981 | |
982 | /* Has the link count changed? */ | |
9e6e70f8 | 983 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 984 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 985 | |
9e6e70f8 | 986 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
987 | invalid |= NFS_INO_INVALID_ATIME; |
988 | ||
989 | if (invalid != 0) | |
990 | nfsi->cache_validity |= invalid; | |
1da177e4 | 991 | |
33801147 | 992 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
993 | return 0; |
994 | } | |
995 | ||
a10ad176 | 996 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 997 | { |
9e6e70f8 TM |
998 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
999 | return 0; | |
a10ad176 TM |
1000 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1001 | } | |
1002 | ||
1003 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1004 | { | |
9e6e70f8 TM |
1005 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1006 | return 0; | |
a10ad176 TM |
1007 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1008 | } | |
870a5be8 | 1009 | |
ae05f269 | 1010 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1011 | |
1012 | static unsigned long nfs_read_attr_generation_counter(void) | |
1013 | { | |
ae05f269 | 1014 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1015 | } |
1016 | ||
1017 | unsigned long nfs_inc_attr_generation_counter(void) | |
1018 | { | |
ae05f269 | 1019 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1020 | } |
1021 | ||
1022 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1023 | { | |
1024 | fattr->valid = 0; | |
1025 | fattr->time_start = jiffies; | |
1026 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1027 | fattr->owner_name = NULL; |
1028 | fattr->group_name = NULL; | |
4704f0e2 TM |
1029 | } |
1030 | ||
2d36bfde TM |
1031 | struct nfs_fattr *nfs_alloc_fattr(void) |
1032 | { | |
1033 | struct nfs_fattr *fattr; | |
1034 | ||
1035 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1036 | if (fattr != NULL) | |
1037 | nfs_fattr_init(fattr); | |
1038 | return fattr; | |
1039 | } | |
1040 | ||
1041 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1042 | { | |
1043 | struct nfs_fh *fh; | |
1044 | ||
1045 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1046 | if (fh != NULL) | |
1047 | fh->size = 0; | |
1048 | return fh; | |
1049 | } | |
1050 | ||
e27d359e | 1051 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1052 | /* |
1053 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1054 | * in the same way that wireshark does | |
1055 | * | |
1056 | * @fh: file handle | |
1057 | * | |
1058 | * For debugging only. | |
1059 | */ | |
1060 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1061 | { | |
1062 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1063 | * not on the result */ | |
1064 | return ~crc32(0xFFFFFFFF, &fh->data[0], fh->size); | |
1065 | } | |
1066 | ||
1067 | /* | |
20d27e92 CL |
1068 | * _nfs_display_fhandle - display an NFS file handle on the console |
1069 | * | |
1070 | * @fh: file handle to display | |
1071 | * @caption: display caption | |
1072 | * | |
1073 | * For debugging only. | |
1074 | */ | |
20d27e92 CL |
1075 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1076 | { | |
1077 | unsigned short i; | |
1078 | ||
fa68a1ba | 1079 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1080 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1081 | return; | |
1082 | } | |
1083 | ||
d8e0539e WAA |
1084 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1085 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1086 | for (i = 0; i < fh->size; i += 16) { |
1087 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1088 | ||
1089 | switch ((fh->size - i - 1) >> 2) { | |
1090 | case 0: | |
1091 | printk(KERN_DEFAULT " %08x\n", | |
1092 | be32_to_cpup(pos)); | |
1093 | break; | |
1094 | case 1: | |
1095 | printk(KERN_DEFAULT " %08x %08x\n", | |
1096 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1097 | break; | |
1098 | case 2: | |
1099 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1100 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1101 | be32_to_cpup(pos + 2)); | |
1102 | break; | |
1103 | default: | |
1104 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1105 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1106 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1107 | } | |
1108 | } | |
1109 | } | |
1110 | #endif | |
1111 | ||
a10ad176 TM |
1112 | /** |
1113 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1114 | * @inode - pointer to inode | |
1115 | * @fattr - attributes | |
1116 | * | |
1117 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1118 | * attributes got scheduled after another call carrying updated ones. | |
1119 | * | |
1120 | * To do so, the function first assumes that a more recent ctime means | |
1121 | * that the attributes in fattr are newer, however it also attempt to | |
1122 | * catch the case where ctime either didn't change, or went backwards | |
1123 | * (if someone reset the clock on the server) by looking at whether | |
1124 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1125 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1126 | * |
1127 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1128 | * more recent than the ones cached in the inode. | |
1129 | * | |
1130 | */ | |
1131 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1132 | { | |
1133 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1134 | ||
4704f0e2 | 1135 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1136 | nfs_ctime_need_update(inode, fattr) || |
1137 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1138 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1139 | } |
1140 | ||
1141 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1142 | { | |
1143 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1144 | return nfs_update_inode(inode, fattr); |
1145 | return nfs_check_inode_attributes(inode, fattr); | |
1146 | } | |
1147 | ||
33801147 TM |
1148 | /** |
1149 | * nfs_refresh_inode - try to update the inode attribute cache | |
1150 | * @inode - pointer to inode | |
1151 | * @fattr - updated attributes | |
1152 | * | |
1153 | * Check that an RPC call that returned attributes has not overlapped with | |
1154 | * other recent updates of the inode metadata, then decide whether it is | |
1155 | * safe to do a full update of the inode attributes, or whether just to | |
1156 | * call nfs_check_inode_attributes. | |
1157 | */ | |
1158 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1159 | { | |
33801147 TM |
1160 | int status; |
1161 | ||
1162 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1163 | return 0; | |
1164 | spin_lock(&inode->i_lock); | |
870a5be8 | 1165 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1166 | spin_unlock(&inode->i_lock); |
ef79c097 | 1167 | |
33801147 TM |
1168 | return status; |
1169 | } | |
1170 | ||
d65f557f TM |
1171 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1172 | { | |
1173 | struct nfs_inode *nfsi = NFS_I(inode); | |
1174 | ||
1175 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1176 | if (S_ISDIR(inode->i_mode)) | |
1177 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1178 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1179 | return 0; | |
1180 | return nfs_refresh_inode_locked(inode, fattr); | |
1181 | } | |
1182 | ||
decf491f TM |
1183 | /** |
1184 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1185 | * @inode - pointer to inode | |
1186 | * @fattr - updated attributes | |
1187 | * | |
1188 | * After an operation that has changed the inode metadata, mark the | |
1189 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1190 | * |
1191 | * NB: if the server didn't return any post op attributes, this | |
1192 | * function will force the retrieval of attributes before the next | |
1193 | * NFS request. Thus it should be used only for operations that | |
1194 | * are expected to change one or more attributes, to avoid | |
1195 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1196 | */ |
1197 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1198 | { | |
d65f557f | 1199 | int status; |
decf491f | 1200 | |
7668fdbe | 1201 | spin_lock(&inode->i_lock); |
d65f557f | 1202 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1203 | spin_unlock(&inode->i_lock); |
870a5be8 | 1204 | return status; |
decf491f TM |
1205 | } |
1206 | ||
70ca8852 TM |
1207 | /** |
1208 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1209 | * @inode - pointer to inode | |
1210 | * @fattr - updated attributes | |
1211 | * | |
1212 | * After an operation that has changed the inode metadata, mark the | |
1213 | * attribute cache as being invalid, then try to update it. Fake up | |
1214 | * weak cache consistency data, if none exist. | |
1215 | * | |
1216 | * This function is mainly designed to be used by the ->write_done() functions. | |
1217 | */ | |
1218 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1219 | { | |
d65f557f TM |
1220 | int status; |
1221 | ||
1222 | spin_lock(&inode->i_lock); | |
1223 | /* Don't do a WCC update if these attributes are already stale */ | |
1224 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1225 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1226 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1227 | | NFS_ATTR_FATTR_PRESIZE | |
1228 | | NFS_ATTR_FATTR_PREMTIME | |
1229 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1230 | goto out_noforce; |
1231 | } | |
9e6e70f8 TM |
1232 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1233 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1234 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1235 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1236 | } |
9e6e70f8 TM |
1237 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1238 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1239 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1240 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1241 | } | |
1242 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1243 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1244 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1245 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1246 | } | |
1247 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1248 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1249 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1250 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1251 | } |
d65f557f TM |
1252 | out_noforce: |
1253 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1254 | spin_unlock(&inode->i_lock); | |
1255 | return status; | |
70ca8852 TM |
1256 | } |
1257 | ||
1da177e4 LT |
1258 | /* |
1259 | * Many nfs protocol calls return the new file attributes after | |
1260 | * an operation. Here we update the inode to reflect the state | |
1261 | * of the server's inode. | |
1262 | * | |
1263 | * This is a bit tricky because we have to make sure all dirty pages | |
1264 | * have been sent off to the server before calling invalidate_inode_pages. | |
1265 | * To make sure no other process adds more write requests while we try | |
1266 | * our best to flush them, we make them sleep during the attribute refresh. | |
1267 | * | |
1268 | * A very similar scenario holds for the dir cache. | |
1269 | */ | |
24aa1fe6 | 1270 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1271 | { |
8b4bdcf8 | 1272 | struct nfs_server *server; |
1da177e4 | 1273 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1274 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1275 | unsigned long invalid = 0; |
3e7d950a | 1276 | unsigned long now = jiffies; |
62ab460c | 1277 | unsigned long save_cache_validity; |
1da177e4 | 1278 | |
4f1abd22 | 1279 | dfprintk(VFS, "NFS: %s(%s/%ld fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1280 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1281 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1282 | atomic_read(&inode->i_count), fattr->valid); |
1283 | ||
e73e6c9e MT |
1284 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1285 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1286 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1287 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1288 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1289 | (long long)fattr->fileid); | |
1290 | goto out_err; | |
1291 | } | |
1da177e4 LT |
1292 | |
1293 | /* | |
1294 | * Make sure the inode's type hasn't changed. | |
1295 | */ | |
e73e6c9e MT |
1296 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1297 | /* | |
1298 | * Big trouble! The inode has become a different object. | |
1299 | */ | |
1300 | printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n", | |
1301 | __func__, inode->i_ino, inode->i_mode, fattr->mode); | |
1302 | goto out_err; | |
1303 | } | |
1da177e4 | 1304 | |
8b4bdcf8 | 1305 | server = NFS_SERVER(inode); |
a0356862 | 1306 | /* Update the fsid? */ |
9e6e70f8 | 1307 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1308 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1309 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1310 | server->fsid = fattr->fsid; |
1311 | ||
1da177e4 LT |
1312 | /* |
1313 | * Update the read time so we don't revalidate too often. | |
1314 | */ | |
33801147 | 1315 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1316 | |
62ab460c TM |
1317 | save_cache_validity = nfsi->cache_validity; |
1318 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1319 | | NFS_INO_INVALID_ATIME | |
1320 | | NFS_INO_REVAL_FORCED | |
1321 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1322 | |
a895b4a1 | 1323 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1324 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1325 | |
47aabaa7 | 1326 | /* More cache consistency checks */ |
9e6e70f8 | 1327 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1328 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1329 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1330 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1331 | invalid |= NFS_INO_INVALID_ATTR |
1332 | | NFS_INO_INVALID_DATA | |
1333 | | NFS_INO_INVALID_ACCESS | |
1334 | | NFS_INO_INVALID_ACL | |
1335 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1336 | if (S_ISDIR(inode->i_mode)) |
1337 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1338 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1339 | } |
62ab460c TM |
1340 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1341 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1342 | |
1343 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1344 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c TM |
1345 | } else if (server->caps & NFS_CAP_MTIME) |
1346 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1347 | | NFS_INO_REVAL_FORCED); |
1348 | ||
9e6e70f8 | 1349 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1350 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c TM |
1351 | } else if (server->caps & NFS_CAP_CTIME) |
1352 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c | 1353 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1354 | |
951a143b | 1355 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1356 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1357 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1358 | cur_isize = i_size_read(inode); | |
1359 | if (new_isize != cur_isize) { | |
1360 | /* Do we perhaps have any outstanding writes, or has | |
1361 | * the file grown beyond our last write? */ | |
0f66b598 PT |
1362 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
1363 | new_isize > cur_isize) { | |
9e6e70f8 TM |
1364 | i_size_write(inode, new_isize); |
1365 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1366 | } | |
60c16ea8 HJ |
1367 | dprintk("NFS: isize change on server for file %s/%ld " |
1368 | "(%Ld to %Ld)\n", | |
1369 | inode->i_sb->s_id, | |
1370 | inode->i_ino, | |
1371 | (long long)cur_isize, | |
1372 | (long long)new_isize); | |
1da177e4 | 1373 | } |
62ab460c TM |
1374 | } else |
1375 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1376 | | NFS_INO_REVAL_PAGECACHE | |
1377 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1378 | |
1da177e4 | 1379 | |
9e6e70f8 TM |
1380 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1381 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1382 | else if (server->caps & NFS_CAP_ATIME) |
1383 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1384 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1385 | |
9e6e70f8 TM |
1386 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1387 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1388 | umode_t newmode = inode->i_mode & S_IFMT; |
1389 | newmode |= fattr->mode & S_IALLUGO; | |
1390 | inode->i_mode = newmode; | |
9e6e70f8 | 1391 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1392 | } |
62ab460c TM |
1393 | } else if (server->caps & NFS_CAP_MODE) |
1394 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1395 | | NFS_INO_INVALID_ACCESS | |
1396 | | NFS_INO_INVALID_ACL | |
1397 | | NFS_INO_REVAL_FORCED); | |
1398 | ||
9e6e70f8 TM |
1399 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1400 | if (inode->i_uid != fattr->uid) { | |
1401 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1402 | inode->i_uid = fattr->uid; | |
1403 | } | |
62ab460c TM |
1404 | } else if (server->caps & NFS_CAP_OWNER) |
1405 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1406 | | NFS_INO_INVALID_ACCESS | |
1407 | | NFS_INO_INVALID_ACL | |
1408 | | NFS_INO_REVAL_FORCED); | |
1409 | ||
9e6e70f8 TM |
1410 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1411 | if (inode->i_gid != fattr->gid) { | |
1412 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1413 | inode->i_gid = fattr->gid; | |
1414 | } | |
62ab460c TM |
1415 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1416 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1417 | | NFS_INO_INVALID_ACCESS | |
1418 | | NFS_INO_INVALID_ACL | |
1419 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1420 | |
9e6e70f8 TM |
1421 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1422 | if (inode->i_nlink != fattr->nlink) { | |
1423 | invalid |= NFS_INO_INVALID_ATTR; | |
1424 | if (S_ISDIR(inode->i_mode)) | |
1425 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1426 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1427 | } |
62ab460c TM |
1428 | } else if (server->caps & NFS_CAP_NLINK) |
1429 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1430 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1431 | |
9e6e70f8 | 1432 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1433 | /* |
1434 | * report the blocks in 512byte units | |
1435 | */ | |
1436 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1437 | } |
9e6e70f8 TM |
1438 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1439 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1440 | |
1441 | /* Update attrtimeo value if we're out of the unstable period */ | |
1442 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1443 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1444 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1445 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1446 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1447 | } else { |
64672d55 | 1448 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1449 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1450 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1451 | nfsi->attrtimeo_timestamp = now; | |
1452 | } | |
1da177e4 | 1453 | } |
f2115dc9 | 1454 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1455 | /* Don't invalidate the data if we were to blame */ |
1456 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1457 | || S_ISLNK(inode->i_mode))) | |
1458 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1459 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1460 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1461 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1462 | |
1463 | return 0; | |
b37b03b7 | 1464 | out_err: |
1da177e4 LT |
1465 | /* |
1466 | * No need to worry about unhashing the dentry, as the | |
1467 | * lookup validation will know that the inode is bad. | |
1468 | * (But we fall through to invalidate the caches.) | |
1469 | */ | |
1470 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1471 | return -ESTALE; |
1472 | } | |
1473 | ||
55a97593 | 1474 | |
1da177e4 LT |
1475 | #ifdef CONFIG_NFS_V4 |
1476 | ||
1da177e4 LT |
1477 | /* |
1478 | * Clean out any remaining NFSv4 state that might be left over due | |
1479 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1480 | * nfs_open(). | |
1481 | */ | |
b57922d9 | 1482 | void nfs4_evict_inode(struct inode *inode) |
1da177e4 | 1483 | { |
b57922d9 | 1484 | truncate_inode_pages(&inode->i_data, 0); |
dbd5768f | 1485 | clear_inode(inode); |
cbe82603 BH |
1486 | pnfs_return_layout(inode); |
1487 | pnfs_destroy_layout(NFS_I(inode)); | |
1da177e4 | 1488 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1489 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1490 | /* First call standard NFS clear_inode() code */ |
1491 | nfs_clear_inode(inode); | |
1da177e4 | 1492 | } |
1da177e4 LT |
1493 | #endif |
1494 | ||
f7b422b1 | 1495 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1496 | { |
1497 | struct nfs_inode *nfsi; | |
e94b1766 | 1498 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1499 | if (!nfsi) |
1500 | return NULL; | |
55296809 CL |
1501 | nfsi->flags = 0UL; |
1502 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1503 | #ifdef CONFIG_NFS_V3_ACL |
1504 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1505 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1506 | #endif | |
e50a1c2e BF |
1507 | #ifdef CONFIG_NFS_V4 |
1508 | nfsi->nfs4_acl = NULL; | |
1509 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1510 | return &nfsi->vfs_inode; |
1511 | } | |
1512 | ||
fa0d7e3d | 1513 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1514 | { |
fa0d7e3d | 1515 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1516 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1517 | } | |
1518 | ||
fa0d7e3d NP |
1519 | void nfs_destroy_inode(struct inode *inode) |
1520 | { | |
1521 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1522 | } | |
1523 | ||
d75d5414 AM |
1524 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1525 | { | |
1526 | #ifdef CONFIG_NFS_V4 | |
1527 | INIT_LIST_HEAD(&nfsi->open_states); | |
1528 | nfsi->delegation = NULL; | |
1529 | nfsi->delegation_state = 0; | |
1530 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1531 | nfsi->layout = NULL; |
d75d5414 AM |
1532 | #endif |
1533 | } | |
f7b422b1 | 1534 | |
51cc5068 | 1535 | static void init_once(void *foo) |
1da177e4 LT |
1536 | { |
1537 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1538 | ||
a35afb83 | 1539 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1540 | INIT_LIST_HEAD(&nfsi->open_files); |
1541 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1542 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1543 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1544 | nfsi->npages = 0; |
ea2cf228 | 1545 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1546 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1547 | atomic_set(&nfsi->silly_count, 1); |
1548 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1549 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1550 | nfs4_init_once(nfsi); |
1da177e4 | 1551 | } |
20c2df83 | 1552 | |
f7b422b1 | 1553 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1554 | { |
1555 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1556 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1557 | 0, (SLAB_RECLAIM_ACCOUNT| |
1558 | SLAB_MEM_SPREAD), | |
20c2df83 | 1559 | init_once); |
1da177e4 LT |
1560 | if (nfs_inode_cachep == NULL) |
1561 | return -ENOMEM; | |
1562 | ||
1563 | return 0; | |
1564 | } | |
1565 | ||
266bee88 | 1566 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1567 | { |
1a1d92c1 | 1568 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1569 | } |
1570 | ||
5746006f TM |
1571 | struct workqueue_struct *nfsiod_workqueue; |
1572 | ||
1573 | /* | |
1574 | * start up the nfsiod workqueue | |
1575 | */ | |
1576 | static int nfsiod_start(void) | |
1577 | { | |
1578 | struct workqueue_struct *wq; | |
1579 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1580 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1581 | if (wq == NULL) |
1582 | return -ENOMEM; | |
1583 | nfsiod_workqueue = wq; | |
1584 | return 0; | |
1585 | } | |
1586 | ||
1587 | /* | |
1588 | * Destroy the nfsiod workqueue | |
1589 | */ | |
1590 | static void nfsiod_stop(void) | |
1591 | { | |
1592 | struct workqueue_struct *wq; | |
1593 | ||
1594 | wq = nfsiod_workqueue; | |
1595 | if (wq == NULL) | |
1596 | return; | |
1597 | nfsiod_workqueue = NULL; | |
1598 | destroy_workqueue(wq); | |
1599 | } | |
1600 | ||
1b340d01 | 1601 | int nfs_net_id; |
9e2e74db | 1602 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1603 | |
1604 | static int nfs_net_init(struct net *net) | |
1605 | { | |
6b13168b | 1606 | nfs_clients_init(net); |
1b340d01 SK |
1607 | return nfs_dns_resolver_cache_init(net); |
1608 | } | |
1609 | ||
1610 | static void nfs_net_exit(struct net *net) | |
1611 | { | |
1612 | nfs_dns_resolver_cache_destroy(net); | |
28cd1b3f | 1613 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1614 | } |
1615 | ||
1616 | static struct pernet_operations nfs_net_ops = { | |
1617 | .init = nfs_net_init, | |
1618 | .exit = nfs_net_exit, | |
1619 | .id = &nfs_net_id, | |
1620 | .size = sizeof(struct nfs_net), | |
1621 | }; | |
1622 | ||
1da177e4 LT |
1623 | /* |
1624 | * Initialize NFS | |
1625 | */ | |
1626 | static int __init init_nfs_fs(void) | |
1627 | { | |
1628 | int err; | |
1629 | ||
e571cbf1 | 1630 | err = nfs_dns_resolver_init(); |
1b340d01 | 1631 | if (err < 0) |
129d1977 | 1632 | goto out11; |
1b340d01 SK |
1633 | |
1634 | err = register_pernet_subsys(&nfs_net_ops); | |
e571cbf1 | 1635 | if (err < 0) |
129d1977 | 1636 | goto out10; |
e571cbf1 | 1637 | |
8ec442ae DH |
1638 | err = nfs_fscache_register(); |
1639 | if (err < 0) | |
129d1977 | 1640 | goto out9; |
8ec442ae | 1641 | |
5746006f TM |
1642 | err = nfsiod_start(); |
1643 | if (err) | |
129d1977 | 1644 | goto out8; |
5746006f | 1645 | |
6aaca566 DH |
1646 | err = nfs_fs_proc_init(); |
1647 | if (err) | |
129d1977 | 1648 | goto out7; |
6aaca566 | 1649 | |
1da177e4 LT |
1650 | err = nfs_init_nfspagecache(); |
1651 | if (err) | |
129d1977 | 1652 | goto out6; |
1da177e4 LT |
1653 | |
1654 | err = nfs_init_inodecache(); | |
1655 | if (err) | |
129d1977 | 1656 | goto out5; |
1da177e4 LT |
1657 | |
1658 | err = nfs_init_readpagecache(); | |
1659 | if (err) | |
129d1977 | 1660 | goto out4; |
1da177e4 LT |
1661 | |
1662 | err = nfs_init_writepagecache(); | |
1663 | if (err) | |
129d1977 | 1664 | goto out3; |
1da177e4 | 1665 | |
1da177e4 LT |
1666 | err = nfs_init_directcache(); |
1667 | if (err) | |
129d1977 | 1668 | goto out2; |
1da177e4 LT |
1669 | |
1670 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1671 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1672 | #endif |
129d1977 BS |
1673 | |
1674 | #ifdef CONFIG_NFS_V4 | |
1675 | err = init_nfs_v4(); | |
1676 | if (err) | |
1677 | goto out1; | |
1678 | #endif | |
1679 | ||
f7b422b1 | 1680 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1681 | goto out0; |
1682 | ||
1da177e4 | 1683 | return 0; |
129d1977 BS |
1684 | out0: |
1685 | #ifdef CONFIG_NFS_V4 | |
1686 | exit_nfs_v4(); | |
1687 | out1: | |
1688 | #endif | |
1da177e4 | 1689 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1690 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1691 | #endif |
1da177e4 | 1692 | nfs_destroy_directcache(); |
1da177e4 | 1693 | out2: |
129d1977 | 1694 | nfs_destroy_writepagecache(); |
1da177e4 | 1695 | out3: |
129d1977 | 1696 | nfs_destroy_readpagecache(); |
1da177e4 | 1697 | out4: |
129d1977 | 1698 | nfs_destroy_inodecache(); |
6aaca566 | 1699 | out5: |
129d1977 | 1700 | nfs_destroy_nfspagecache(); |
5746006f | 1701 | out6: |
129d1977 | 1702 | nfs_fs_proc_exit(); |
8ec442ae | 1703 | out7: |
129d1977 | 1704 | nfsiod_stop(); |
e571cbf1 | 1705 | out8: |
129d1977 | 1706 | nfs_fscache_unregister(); |
955a857e | 1707 | out9: |
129d1977 | 1708 | unregister_pernet_subsys(&nfs_net_ops); |
1b340d01 | 1709 | out10: |
129d1977 BS |
1710 | nfs_dns_resolver_destroy(); |
1711 | out11: | |
1da177e4 LT |
1712 | return err; |
1713 | } | |
1714 | ||
1715 | static void __exit exit_nfs_fs(void) | |
1716 | { | |
129d1977 BS |
1717 | #ifdef CONFIG_NFS_V4 |
1718 | exit_nfs_v4(); | |
1719 | #endif | |
1da177e4 | 1720 | nfs_destroy_directcache(); |
1da177e4 LT |
1721 | nfs_destroy_writepagecache(); |
1722 | nfs_destroy_readpagecache(); | |
1723 | nfs_destroy_inodecache(); | |
1724 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1725 | nfs_fscache_unregister(); |
1b340d01 | 1726 | unregister_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1727 | nfs_dns_resolver_destroy(); |
1da177e4 | 1728 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1729 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1730 | #endif |
f7b422b1 | 1731 | unregister_nfs_fs(); |
6aaca566 | 1732 | nfs_fs_proc_exit(); |
5746006f | 1733 | nfsiod_stop(); |
1da177e4 LT |
1734 | } |
1735 | ||
1736 | /* Not quite true; I just maintain it */ | |
1737 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1738 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1739 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1740 | |
1741 | module_init(init_nfs_fs) | |
1742 | module_exit(exit_nfs_fs) |