4 * Copyright (C) 1992 Rick Sladkey
6 * nfs inode and superblock handling functions
8 * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
9 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
11 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
12 * J.S.Peatfield@damtp.cam.ac.uk
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/sched.h>
19 #include <linux/time.h>
20 #include <linux/kernel.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>
28 #include <linux/sunrpc/metrics.h>
29 #include <linux/nfs_fs.h>
30 #include <linux/nfs_mount.h>
31 #include <linux/nfs4_mount.h>
32 #include <linux/lockd/bind.h>
33 #include <linux/seq_file.h>
34 #include <linux/mount.h>
35 #include <linux/nfs_idmap.h>
36 #include <linux/vfs.h>
37 #include <linux/inet.h>
38 #include <linux/nfs_xdr.h>
40 #include <asm/system.h>
41 #include <asm/uaccess.h>
45 #include "delegation.h"
49 #include "dns_resolve.h"
51 #define NFSDBG_FACILITY NFSDBG_VFS
53 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
55 /* Default is to see 64-bit inode numbers */
56 static int enable_ino64
= NFS_64_BIT_INODE_NUMBERS_ENABLED
;
58 static void nfs_invalidate_inode(struct inode
*);
59 static int nfs_update_inode(struct inode
*, struct nfs_fattr
*);
61 static struct kmem_cache
* nfs_inode_cachep
;
63 static inline unsigned long
64 nfs_fattr_to_ino_t(struct nfs_fattr
*fattr
)
66 return nfs_fileid_to_ino_t(fattr
->fileid
);
70 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
71 * @word: long word containing the bit lock
73 int nfs_wait_bit_killable(void *word
)
75 if (fatal_signal_pending(current
))
82 * nfs_compat_user_ino64 - returns the user-visible inode number
83 * @fileid: 64-bit fileid
85 * This function returns a 32-bit inode number if the boot parameter
86 * nfs.enable_ino64 is zero.
88 u64
nfs_compat_user_ino64(u64 fileid
)
95 if (sizeof(ino
) < sizeof(fileid
))
96 ino
^= fileid
>> (sizeof(fileid
)-sizeof(ino
)) * 8;
100 void nfs_clear_inode(struct inode
*inode
)
103 * The following should never happen...
105 BUG_ON(nfs_have_writebacks(inode
));
106 BUG_ON(!list_empty(&NFS_I(inode
)->open_files
));
107 nfs_zap_acl_cache(inode
);
108 nfs_access_zap_cache(inode
);
109 nfs_fscache_release_inode_cookie(inode
);
113 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
115 int nfs_sync_mapping(struct address_space
*mapping
)
119 if (mapping
->nrpages
!= 0) {
120 unmap_mapping_range(mapping
, 0, 0, 0);
121 ret
= nfs_wb_all(mapping
->host
);
127 * Invalidate the local caches
129 static void nfs_zap_caches_locked(struct inode
*inode
)
131 struct nfs_inode
*nfsi
= NFS_I(inode
);
132 int mode
= inode
->i_mode
;
134 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
136 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
137 nfsi
->attrtimeo_timestamp
= jiffies
;
139 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
140 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
141 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
143 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
146 void nfs_zap_caches(struct inode
*inode
)
148 spin_lock(&inode
->i_lock
);
149 nfs_zap_caches_locked(inode
);
150 spin_unlock(&inode
->i_lock
);
153 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
155 if (mapping
->nrpages
!= 0) {
156 spin_lock(&inode
->i_lock
);
157 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_DATA
;
158 spin_unlock(&inode
->i_lock
);
162 void nfs_zap_acl_cache(struct inode
*inode
)
164 void (*clear_acl_cache
)(struct inode
*);
166 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
167 if (clear_acl_cache
!= NULL
)
168 clear_acl_cache(inode
);
169 spin_lock(&inode
->i_lock
);
170 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
171 spin_unlock(&inode
->i_lock
);
174 void nfs_invalidate_atime(struct inode
*inode
)
176 spin_lock(&inode
->i_lock
);
177 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATIME
;
178 spin_unlock(&inode
->i_lock
);
182 * Invalidate, but do not unhash, the inode.
183 * NB: must be called with inode->i_lock held!
185 static void nfs_invalidate_inode(struct inode
*inode
)
187 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
188 nfs_zap_caches_locked(inode
);
191 struct nfs_find_desc
{
193 struct nfs_fattr
*fattr
;
197 * In NFSv3 we can have 64bit inode numbers. In order to support
198 * this, and re-exported directories (also seen in NFSv2)
199 * we are forced to allow 2 different inodes to have the same
203 nfs_find_actor(struct inode
*inode
, void *opaque
)
205 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
206 struct nfs_fh
*fh
= desc
->fh
;
207 struct nfs_fattr
*fattr
= desc
->fattr
;
209 if (NFS_FILEID(inode
) != fattr
->fileid
)
211 if (nfs_compare_fh(NFS_FH(inode
), fh
))
213 if (is_bad_inode(inode
) || NFS_STALE(inode
))
219 nfs_init_locked(struct inode
*inode
, void *opaque
)
221 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
222 struct nfs_fattr
*fattr
= desc
->fattr
;
224 set_nfs_fileid(inode
, fattr
->fileid
);
225 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
229 /* Don't use READDIRPLUS on directories that we believe are too large */
230 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
233 * This is our front-end to iget that looks up inodes by file handle
234 * instead of inode number.
237 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
239 struct nfs_find_desc desc
= {
243 struct inode
*inode
= ERR_PTR(-ENOENT
);
246 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
248 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
251 hash
= nfs_fattr_to_ino_t(fattr
);
253 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
255 inode
= ERR_PTR(-ENOMEM
);
259 if (inode
->i_state
& I_NEW
) {
260 struct nfs_inode
*nfsi
= NFS_I(inode
);
261 unsigned long now
= jiffies
;
263 /* We set i_ino for the few things that still rely on it,
267 /* We can't support update_atime(), since the server will reset it */
268 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
269 inode
->i_mode
= fattr
->mode
;
270 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
271 && nfs_server_capable(inode
, NFS_CAP_MODE
))
272 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
273 | NFS_INO_INVALID_ACCESS
274 | NFS_INO_INVALID_ACL
;
275 /* Why so? Because we want revalidate for devices/FIFOs, and
276 * that's precisely what we have in nfs_file_inode_operations.
278 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
279 if (S_ISREG(inode
->i_mode
)) {
280 inode
->i_fop
= &nfs_file_operations
;
281 inode
->i_data
.a_ops
= &nfs_file_aops
;
282 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
283 } else if (S_ISDIR(inode
->i_mode
)) {
284 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
285 inode
->i_fop
= &nfs_dir_operations
;
286 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
287 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
288 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_I(inode
)->flags
);
289 /* Deal with crossing mountpoints */
290 if ((fattr
->valid
& NFS_ATTR_FATTR_FSID
)
291 && !nfs_fsid_equal(&NFS_SB(sb
)->fsid
, &fattr
->fsid
)) {
292 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
293 inode
->i_op
= &nfs_referral_inode_operations
;
295 inode
->i_op
= &nfs_mountpoint_inode_operations
;
297 set_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
);
299 } else if (S_ISLNK(inode
->i_mode
))
300 inode
->i_op
= &nfs_symlink_inode_operations
;
302 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
304 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
305 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
306 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
307 nfsi
->change_attr
= 0;
313 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
315 nfsi
->read_cache_jiffies
= fattr
->time_start
;
316 nfsi
->attr_gencount
= fattr
->gencount
;
317 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
318 inode
->i_atime
= fattr
->atime
;
319 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
320 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
321 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
322 inode
->i_mtime
= fattr
->mtime
;
323 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
324 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
325 | NFS_INO_INVALID_DATA
;
326 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
327 inode
->i_ctime
= fattr
->ctime
;
328 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
329 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
330 | NFS_INO_INVALID_ACCESS
331 | NFS_INO_INVALID_ACL
;
332 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
333 nfsi
->change_attr
= fattr
->change_attr
;
334 else if (nfs_server_capable(inode
, NFS_CAP_CHANGE_ATTR
))
335 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
336 | NFS_INO_INVALID_DATA
;
337 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
338 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
340 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
341 | NFS_INO_INVALID_DATA
342 | NFS_INO_REVAL_PAGECACHE
;
343 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
344 inode
->i_nlink
= fattr
->nlink
;
345 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
346 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
347 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
348 inode
->i_uid
= fattr
->uid
;
349 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
350 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
351 | NFS_INO_INVALID_ACCESS
352 | NFS_INO_INVALID_ACL
;
353 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
354 inode
->i_gid
= fattr
->gid
;
355 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
356 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
357 | NFS_INO_INVALID_ACCESS
358 | NFS_INO_INVALID_ACL
;
359 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
360 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
361 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
363 * report the blocks in 512byte units
365 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
367 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
368 nfsi
->attrtimeo_timestamp
= now
;
369 nfsi
->access_cache
= RB_ROOT
;
371 nfs_fscache_init_inode_cookie(inode
);
373 unlock_new_inode(inode
);
375 nfs_refresh_inode(inode
, fattr
);
376 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
378 (long long)NFS_FILEID(inode
),
379 atomic_read(&inode
->i_count
));
385 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
389 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
392 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
394 struct inode
*inode
= dentry
->d_inode
;
395 struct nfs_fattr fattr
;
398 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
400 /* skip mode change if it's just for clearing setuid/setgid */
401 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
402 attr
->ia_valid
&= ~ATTR_MODE
;
404 if (attr
->ia_valid
& ATTR_SIZE
) {
405 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
406 attr
->ia_valid
&= ~ATTR_SIZE
;
409 /* Optimization: if the end result is no change, don't RPC */
410 attr
->ia_valid
&= NFS_VALID_ATTRS
;
411 if ((attr
->ia_valid
& ~ATTR_FILE
) == 0)
414 /* Write all dirty data */
415 if (S_ISREG(inode
->i_mode
)) {
416 filemap_write_and_wait(inode
->i_mapping
);
420 * Return any delegations if we're going to change ACLs
422 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
423 nfs_inode_return_delegation(inode
);
424 error
= NFS_PROTO(inode
)->setattr(dentry
, &fattr
, attr
);
426 nfs_refresh_inode(inode
, &fattr
);
431 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
432 * @inode: inode of the file used
433 * @offset: file offset to start truncating
435 * This is a copy of the common vmtruncate, but with the locking
436 * corrected to take into account the fact that NFS requires
437 * inode->i_size to be updated under the inode->i_lock.
439 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
444 err
= inode_newsize_ok(inode
, offset
);
448 spin_lock(&inode
->i_lock
);
449 oldsize
= inode
->i_size
;
450 i_size_write(inode
, offset
);
451 spin_unlock(&inode
->i_lock
);
453 truncate_pagecache(inode
, oldsize
, offset
);
459 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
460 * @inode: pointer to struct inode
461 * @attr: pointer to struct iattr
463 * Note: we do this in the *proc.c in order to ensure that
464 * it works for things like exclusive creates too.
466 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
468 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
469 spin_lock(&inode
->i_lock
);
470 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
471 int mode
= attr
->ia_mode
& S_IALLUGO
;
472 mode
|= inode
->i_mode
& ~S_IALLUGO
;
473 inode
->i_mode
= mode
;
475 if ((attr
->ia_valid
& ATTR_UID
) != 0)
476 inode
->i_uid
= attr
->ia_uid
;
477 if ((attr
->ia_valid
& ATTR_GID
) != 0)
478 inode
->i_gid
= attr
->ia_gid
;
479 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
480 spin_unlock(&inode
->i_lock
);
482 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
483 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
484 nfs_vmtruncate(inode
, attr
->ia_size
);
488 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
490 struct inode
*inode
= dentry
->d_inode
;
491 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
494 /* Flush out writes to the server in order to update c/mtime. */
495 if (S_ISREG(inode
->i_mode
)) {
496 err
= filemap_write_and_wait(inode
->i_mapping
);
502 * We may force a getattr if the user cares about atime.
504 * Note that we only have to check the vfsmount flags here:
505 * - NFS always sets S_NOATIME by so checking it would give a
507 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
508 * no point in checking those.
510 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
511 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
515 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
517 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
519 generic_fillattr(inode
, stat
);
520 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
527 * nfs_close_context - Common close_context() routine NFSv2/v3
528 * @ctx: pointer to context
529 * @is_sync: is this a synchronous close
531 * always ensure that the attributes are up to date if we're mounted
532 * with close-to-open semantics
534 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
537 struct nfs_server
*server
;
539 if (!(ctx
->mode
& FMODE_WRITE
))
543 inode
= ctx
->path
.dentry
->d_inode
;
544 if (!list_empty(&NFS_I(inode
)->open_files
))
546 server
= NFS_SERVER(inode
);
547 if (server
->flags
& NFS_MOUNT_NOCTO
)
549 nfs_revalidate_inode(server
, inode
);
552 static struct nfs_open_context
*alloc_nfs_open_context(struct path
*path
, struct rpc_cred
*cred
)
554 struct nfs_open_context
*ctx
;
556 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
559 path_get(&ctx
->path
);
560 ctx
->cred
= get_rpccred(cred
);
562 ctx
->lockowner
= current
->files
;
566 atomic_set(&ctx
->count
, 1);
571 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
574 atomic_inc(&ctx
->count
);
578 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
580 struct inode
*inode
= ctx
->path
.dentry
->d_inode
;
582 if (!atomic_dec_and_lock(&ctx
->count
, &inode
->i_lock
))
584 list_del(&ctx
->list
);
585 spin_unlock(&inode
->i_lock
);
586 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
587 if (ctx
->cred
!= NULL
)
588 put_rpccred(ctx
->cred
);
589 path_put(&ctx
->path
);
593 void put_nfs_open_context(struct nfs_open_context
*ctx
)
595 __put_nfs_open_context(ctx
, 0);
599 * Ensure that mmap has a recent RPC credential for use when writing out
602 static void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
604 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
605 struct nfs_inode
*nfsi
= NFS_I(inode
);
607 filp
->private_data
= get_nfs_open_context(ctx
);
608 spin_lock(&inode
->i_lock
);
609 list_add(&ctx
->list
, &nfsi
->open_files
);
610 spin_unlock(&inode
->i_lock
);
614 * Given an inode, search for an open context with the desired characteristics
616 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
618 struct nfs_inode
*nfsi
= NFS_I(inode
);
619 struct nfs_open_context
*pos
, *ctx
= NULL
;
621 spin_lock(&inode
->i_lock
);
622 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
623 if (cred
!= NULL
&& pos
->cred
!= cred
)
625 if ((pos
->mode
& mode
) == mode
) {
626 ctx
= get_nfs_open_context(pos
);
630 spin_unlock(&inode
->i_lock
);
634 static void nfs_file_clear_open_context(struct file
*filp
)
636 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
637 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
640 filp
->private_data
= NULL
;
641 spin_lock(&inode
->i_lock
);
642 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
643 spin_unlock(&inode
->i_lock
);
644 __put_nfs_open_context(ctx
, filp
->f_flags
& O_DIRECT
? 0 : 1);
649 * These allocate and release file read/write context information.
651 int nfs_open(struct inode
*inode
, struct file
*filp
)
653 struct nfs_open_context
*ctx
;
654 struct rpc_cred
*cred
;
656 cred
= rpc_lookup_cred();
658 return PTR_ERR(cred
);
659 ctx
= alloc_nfs_open_context(&filp
->f_path
, cred
);
663 ctx
->mode
= filp
->f_mode
;
664 nfs_file_set_open_context(filp
, ctx
);
665 put_nfs_open_context(ctx
);
666 nfs_fscache_set_inode_cookie(inode
, filp
);
670 int nfs_release(struct inode
*inode
, struct file
*filp
)
672 nfs_file_clear_open_context(filp
);
677 * This function is called whenever some part of NFS notices that
678 * the cached attributes have to be refreshed.
681 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
683 int status
= -ESTALE
;
684 struct nfs_fattr fattr
;
685 struct nfs_inode
*nfsi
= NFS_I(inode
);
687 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
688 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
690 if (is_bad_inode(inode
))
692 if (NFS_STALE(inode
))
695 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
696 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), &fattr
);
698 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
700 (long long)NFS_FILEID(inode
), status
);
701 if (status
== -ESTALE
) {
702 nfs_zap_caches(inode
);
703 if (!S_ISDIR(inode
->i_mode
))
704 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
709 status
= nfs_refresh_inode(inode
, &fattr
);
711 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
713 (long long)NFS_FILEID(inode
), status
);
717 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
718 nfs_zap_acl_cache(inode
);
720 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
722 (long long)NFS_FILEID(inode
));
728 int nfs_attribute_timeout(struct inode
*inode
)
730 struct nfs_inode
*nfsi
= NFS_I(inode
);
732 if (nfs_have_delegated_attributes(inode
))
734 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
738 * nfs_revalidate_inode - Revalidate the inode attributes
739 * @server - pointer to nfs_server struct
740 * @inode - pointer to inode struct
742 * Updates inode attribute information by retrieving the data from the server.
744 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
746 if (!(NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATTR
)
747 && !nfs_attribute_timeout(inode
))
748 return NFS_STALE(inode
) ? -ESTALE
: 0;
749 return __nfs_revalidate_inode(server
, inode
);
752 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
754 struct nfs_inode
*nfsi
= NFS_I(inode
);
756 if (mapping
->nrpages
!= 0) {
757 int ret
= invalidate_inode_pages2(mapping
);
761 spin_lock(&inode
->i_lock
);
762 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
763 if (S_ISDIR(inode
->i_mode
))
764 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
765 spin_unlock(&inode
->i_lock
);
766 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
767 nfs_fscache_reset_inode_cookie(inode
);
768 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
769 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
774 * nfs_revalidate_mapping - Revalidate the pagecache
775 * @inode - pointer to host inode
776 * @mapping - pointer to mapping
778 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
780 struct nfs_inode
*nfsi
= NFS_I(inode
);
783 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
784 || nfs_attribute_timeout(inode
) || NFS_STALE(inode
)) {
785 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
789 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
790 ret
= nfs_invalidate_mapping(inode
, mapping
);
795 static void nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
797 struct nfs_inode
*nfsi
= NFS_I(inode
);
799 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
800 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
801 && nfsi
->change_attr
== fattr
->pre_change_attr
) {
802 nfsi
->change_attr
= fattr
->change_attr
;
803 if (S_ISDIR(inode
->i_mode
))
804 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
806 /* If we have atomic WCC data, we may update some attributes */
807 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
808 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
809 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
))
810 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
812 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
813 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
814 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
815 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
816 if (S_ISDIR(inode
->i_mode
))
817 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
819 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
820 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
821 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
822 && nfsi
->npages
== 0)
823 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
827 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
828 * @inode - pointer to inode
829 * @fattr - updated attributes
831 * Verifies the attribute cache. If we have just changed the attributes,
832 * so that fattr carries weak cache consistency data, then it may
833 * also update the ctime/mtime/change_attribute.
835 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
837 struct nfs_inode
*nfsi
= NFS_I(inode
);
838 loff_t cur_size
, new_isize
;
839 unsigned long invalid
= 0;
842 /* Has the inode gone and changed behind our back? */
843 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
845 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
848 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
849 nfsi
->change_attr
!= fattr
->change_attr
)
850 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
852 /* Verify a few of the more important attributes */
853 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
854 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
856 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
857 cur_size
= i_size_read(inode
);
858 new_isize
= nfs_size_to_loff_t(fattr
->size
);
859 if (cur_size
!= new_isize
&& nfsi
->npages
== 0)
860 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
863 /* Have any file permissions changed? */
864 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
865 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
866 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && inode
->i_uid
!= fattr
->uid
)
867 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
868 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && inode
->i_gid
!= fattr
->gid
)
869 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
871 /* Has the link count changed? */
872 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
873 invalid
|= NFS_INO_INVALID_ATTR
;
875 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
876 invalid
|= NFS_INO_INVALID_ATIME
;
879 nfsi
->cache_validity
|= invalid
;
881 nfsi
->read_cache_jiffies
= fattr
->time_start
;
885 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
887 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
889 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
892 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
894 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
896 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
899 static atomic_long_t nfs_attr_generation_counter
;
901 static unsigned long nfs_read_attr_generation_counter(void)
903 return atomic_long_read(&nfs_attr_generation_counter
);
906 unsigned long nfs_inc_attr_generation_counter(void)
908 return atomic_long_inc_return(&nfs_attr_generation_counter
);
911 void nfs_fattr_init(struct nfs_fattr
*fattr
)
914 fattr
->time_start
= jiffies
;
915 fattr
->gencount
= nfs_inc_attr_generation_counter();
919 * nfs_inode_attrs_need_update - check if the inode attributes need updating
920 * @inode - pointer to inode
921 * @fattr - attributes
923 * Attempt to divine whether or not an RPC call reply carrying stale
924 * attributes got scheduled after another call carrying updated ones.
926 * To do so, the function first assumes that a more recent ctime means
927 * that the attributes in fattr are newer, however it also attempt to
928 * catch the case where ctime either didn't change, or went backwards
929 * (if someone reset the clock on the server) by looking at whether
930 * or not this RPC call was started after the inode was last updated.
931 * Note also the check for wraparound of 'attr_gencount'
933 * The function returns 'true' if it thinks the attributes in 'fattr' are
934 * more recent than the ones cached in the inode.
937 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
939 const struct nfs_inode
*nfsi
= NFS_I(inode
);
941 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
942 nfs_ctime_need_update(inode
, fattr
) ||
943 nfs_size_need_update(inode
, fattr
) ||
944 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
947 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
949 if (nfs_inode_attrs_need_update(inode
, fattr
))
950 return nfs_update_inode(inode
, fattr
);
951 return nfs_check_inode_attributes(inode
, fattr
);
955 * nfs_refresh_inode - try to update the inode attribute cache
956 * @inode - pointer to inode
957 * @fattr - updated attributes
959 * Check that an RPC call that returned attributes has not overlapped with
960 * other recent updates of the inode metadata, then decide whether it is
961 * safe to do a full update of the inode attributes, or whether just to
962 * call nfs_check_inode_attributes.
964 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
968 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
970 spin_lock(&inode
->i_lock
);
971 status
= nfs_refresh_inode_locked(inode
, fattr
);
972 spin_unlock(&inode
->i_lock
);
977 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
979 struct nfs_inode
*nfsi
= NFS_I(inode
);
981 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
982 if (S_ISDIR(inode
->i_mode
))
983 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
984 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
986 return nfs_refresh_inode_locked(inode
, fattr
);
990 * nfs_post_op_update_inode - try to update the inode attribute cache
991 * @inode - pointer to inode
992 * @fattr - updated attributes
994 * After an operation that has changed the inode metadata, mark the
995 * attribute cache as being invalid, then try to update it.
997 * NB: if the server didn't return any post op attributes, this
998 * function will force the retrieval of attributes before the next
999 * NFS request. Thus it should be used only for operations that
1000 * are expected to change one or more attributes, to avoid
1001 * unnecessary NFS requests and trips through nfs_update_inode().
1003 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1007 spin_lock(&inode
->i_lock
);
1008 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1009 spin_unlock(&inode
->i_lock
);
1014 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1015 * @inode - pointer to inode
1016 * @fattr - updated attributes
1018 * After an operation that has changed the inode metadata, mark the
1019 * attribute cache as being invalid, then try to update it. Fake up
1020 * weak cache consistency data, if none exist.
1022 * This function is mainly designed to be used by the ->write_done() functions.
1024 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1028 spin_lock(&inode
->i_lock
);
1029 /* Don't do a WCC update if these attributes are already stale */
1030 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1031 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1032 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1033 | NFS_ATTR_FATTR_PRESIZE
1034 | NFS_ATTR_FATTR_PREMTIME
1035 | NFS_ATTR_FATTR_PRECTIME
);
1038 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1039 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1040 fattr
->pre_change_attr
= NFS_I(inode
)->change_attr
;
1041 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1043 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1044 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1045 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1046 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1048 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1049 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1050 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1051 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1053 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1054 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1055 fattr
->pre_size
= i_size_read(inode
);
1056 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1059 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1060 spin_unlock(&inode
->i_lock
);
1065 * Many nfs protocol calls return the new file attributes after
1066 * an operation. Here we update the inode to reflect the state
1067 * of the server's inode.
1069 * This is a bit tricky because we have to make sure all dirty pages
1070 * have been sent off to the server before calling invalidate_inode_pages.
1071 * To make sure no other process adds more write requests while we try
1072 * our best to flush them, we make them sleep during the attribute refresh.
1074 * A very similar scenario holds for the dir cache.
1076 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1078 struct nfs_server
*server
;
1079 struct nfs_inode
*nfsi
= NFS_I(inode
);
1080 loff_t cur_isize
, new_isize
;
1081 unsigned long invalid
= 0;
1082 unsigned long now
= jiffies
;
1083 unsigned long save_cache_validity
;
1085 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1086 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1087 atomic_read(&inode
->i_count
), fattr
->valid
);
1089 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1093 * Make sure the inode's type hasn't changed.
1095 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1098 server
= NFS_SERVER(inode
);
1099 /* Update the fsid? */
1100 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1101 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1102 !test_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
))
1103 server
->fsid
= fattr
->fsid
;
1106 * Update the read time so we don't revalidate too often.
1108 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1110 save_cache_validity
= nfsi
->cache_validity
;
1111 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1112 | NFS_INO_INVALID_ATIME
1113 | NFS_INO_REVAL_FORCED
1114 | NFS_INO_REVAL_PAGECACHE
);
1116 /* Do atomic weak cache consistency updates */
1117 nfs_wcc_update_inode(inode
, fattr
);
1119 /* More cache consistency checks */
1120 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1121 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1122 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1123 inode
->i_sb
->s_id
, inode
->i_ino
);
1124 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1125 if (S_ISDIR(inode
->i_mode
))
1126 nfs_force_lookup_revalidate(inode
);
1127 nfsi
->change_attr
= fattr
->change_attr
;
1129 } else if (server
->caps
& NFS_CAP_CHANGE_ATTR
)
1130 invalid
|= save_cache_validity
;
1132 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1133 /* NFSv2/v3: Check if the mtime agrees */
1134 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1135 dprintk("NFS: mtime change on server for file %s/%ld\n",
1136 inode
->i_sb
->s_id
, inode
->i_ino
);
1137 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1138 if (S_ISDIR(inode
->i_mode
))
1139 nfs_force_lookup_revalidate(inode
);
1140 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1142 } else if (server
->caps
& NFS_CAP_MTIME
)
1143 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1144 | NFS_INO_INVALID_DATA
1145 | NFS_INO_REVAL_PAGECACHE
1146 | NFS_INO_REVAL_FORCED
);
1148 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1149 /* If ctime has changed we should definitely clear access+acl caches */
1150 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1151 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1152 /* and probably clear data for a directory too as utimes can cause
1153 * havoc with our cache.
1155 if (S_ISDIR(inode
->i_mode
)) {
1156 invalid
|= NFS_INO_INVALID_DATA
;
1157 nfs_force_lookup_revalidate(inode
);
1159 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1161 } else if (server
->caps
& NFS_CAP_CTIME
)
1162 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1163 | NFS_INO_INVALID_ACCESS
1164 | NFS_INO_INVALID_ACL
1165 | NFS_INO_REVAL_FORCED
);
1167 /* Check if our cached file size is stale */
1168 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1169 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1170 cur_isize
= i_size_read(inode
);
1171 if (new_isize
!= cur_isize
) {
1172 /* Do we perhaps have any outstanding writes, or has
1173 * the file grown beyond our last write? */
1174 if (nfsi
->npages
== 0 || new_isize
> cur_isize
) {
1175 i_size_write(inode
, new_isize
);
1176 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1178 dprintk("NFS: isize change on server for file %s/%ld\n",
1179 inode
->i_sb
->s_id
, inode
->i_ino
);
1182 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1183 | NFS_INO_REVAL_PAGECACHE
1184 | NFS_INO_REVAL_FORCED
);
1187 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1188 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1189 else if (server
->caps
& NFS_CAP_ATIME
)
1190 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATIME
1191 | NFS_INO_REVAL_FORCED
);
1193 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1194 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1195 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1196 newmode
|= fattr
->mode
& S_IALLUGO
;
1197 inode
->i_mode
= newmode
;
1198 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1200 } else if (server
->caps
& NFS_CAP_MODE
)
1201 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1202 | NFS_INO_INVALID_ACCESS
1203 | NFS_INO_INVALID_ACL
1204 | NFS_INO_REVAL_FORCED
);
1206 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1207 if (inode
->i_uid
!= fattr
->uid
) {
1208 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1209 inode
->i_uid
= fattr
->uid
;
1211 } else if (server
->caps
& NFS_CAP_OWNER
)
1212 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1213 | NFS_INO_INVALID_ACCESS
1214 | NFS_INO_INVALID_ACL
1215 | NFS_INO_REVAL_FORCED
);
1217 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1218 if (inode
->i_gid
!= fattr
->gid
) {
1219 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1220 inode
->i_gid
= fattr
->gid
;
1222 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
)
1223 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1224 | NFS_INO_INVALID_ACCESS
1225 | NFS_INO_INVALID_ACL
1226 | NFS_INO_REVAL_FORCED
);
1228 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1229 if (inode
->i_nlink
!= fattr
->nlink
) {
1230 invalid
|= NFS_INO_INVALID_ATTR
;
1231 if (S_ISDIR(inode
->i_mode
))
1232 invalid
|= NFS_INO_INVALID_DATA
;
1233 inode
->i_nlink
= fattr
->nlink
;
1235 } else if (server
->caps
& NFS_CAP_NLINK
)
1236 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1237 | NFS_INO_REVAL_FORCED
);
1239 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1241 * report the blocks in 512byte units
1243 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1245 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1246 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1248 /* Update attrtimeo value if we're out of the unstable period */
1249 if (invalid
& NFS_INO_INVALID_ATTR
) {
1250 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1251 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1252 nfsi
->attrtimeo_timestamp
= now
;
1253 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1255 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1256 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1257 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1258 nfsi
->attrtimeo_timestamp
= now
;
1261 invalid
&= ~NFS_INO_INVALID_ATTR
;
1262 /* Don't invalidate the data if we were to blame */
1263 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1264 || S_ISLNK(inode
->i_mode
)))
1265 invalid
&= ~NFS_INO_INVALID_DATA
;
1266 if (!nfs_have_delegation(inode
, FMODE_READ
) ||
1267 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1268 nfsi
->cache_validity
|= invalid
;
1273 * Big trouble! The inode has become a different object.
1275 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1276 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1279 * No need to worry about unhashing the dentry, as the
1280 * lookup validation will know that the inode is bad.
1281 * (But we fall through to invalidate the caches.)
1283 nfs_invalidate_inode(inode
);
1287 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1288 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1289 NFS_SERVER(inode
)->nfs_client
->cl_hostname
, inode
->i_sb
->s_id
,
1290 (long long)nfsi
->fileid
, (long long)fattr
->fileid
);
1295 #ifdef CONFIG_NFS_V4
1298 * Clean out any remaining NFSv4 state that might be left over due
1299 * to open() calls that passed nfs_atomic_lookup, but failed to call
1302 void nfs4_clear_inode(struct inode
*inode
)
1304 /* If we are holding a delegation, return it! */
1305 nfs_inode_return_delegation_noreclaim(inode
);
1306 /* First call standard NFS clear_inode() code */
1307 nfs_clear_inode(inode
);
1311 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1313 struct nfs_inode
*nfsi
;
1314 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1318 nfsi
->cache_validity
= 0UL;
1319 #ifdef CONFIG_NFS_V3_ACL
1320 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
1321 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
1323 #ifdef CONFIG_NFS_V4
1324 nfsi
->nfs4_acl
= NULL
;
1325 #endif /* CONFIG_NFS_V4 */
1326 return &nfsi
->vfs_inode
;
1329 void nfs_destroy_inode(struct inode
*inode
)
1331 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1334 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1336 #ifdef CONFIG_NFS_V4
1337 INIT_LIST_HEAD(&nfsi
->open_states
);
1338 nfsi
->delegation
= NULL
;
1339 nfsi
->delegation_state
= 0;
1340 init_rwsem(&nfsi
->rwsem
);
1344 static void init_once(void *foo
)
1346 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1348 inode_init_once(&nfsi
->vfs_inode
);
1349 INIT_LIST_HEAD(&nfsi
->open_files
);
1350 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1351 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1352 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
1355 atomic_set(&nfsi
->silly_count
, 1);
1356 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1357 init_waitqueue_head(&nfsi
->waitqueue
);
1358 nfs4_init_once(nfsi
);
1361 static int __init
nfs_init_inodecache(void)
1363 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1364 sizeof(struct nfs_inode
),
1365 0, (SLAB_RECLAIM_ACCOUNT
|
1368 if (nfs_inode_cachep
== NULL
)
1374 static void nfs_destroy_inodecache(void)
1376 kmem_cache_destroy(nfs_inode_cachep
);
1379 struct workqueue_struct
*nfsiod_workqueue
;
1382 * start up the nfsiod workqueue
1384 static int nfsiod_start(void)
1386 struct workqueue_struct
*wq
;
1387 dprintk("RPC: creating workqueue nfsiod\n");
1388 wq
= create_singlethread_workqueue("nfsiod");
1391 nfsiod_workqueue
= wq
;
1396 * Destroy the nfsiod workqueue
1398 static void nfsiod_stop(void)
1400 struct workqueue_struct
*wq
;
1402 wq
= nfsiod_workqueue
;
1405 nfsiod_workqueue
= NULL
;
1406 destroy_workqueue(wq
);
1412 static int __init
init_nfs_fs(void)
1416 err
= nfs_dns_resolver_init();
1420 err
= nfs_fscache_register();
1424 err
= nfsiod_start();
1428 err
= nfs_fs_proc_init();
1432 err
= nfs_init_nfspagecache();
1436 err
= nfs_init_inodecache();
1440 err
= nfs_init_readpagecache();
1444 err
= nfs_init_writepagecache();
1448 err
= nfs_init_directcache();
1452 #ifdef CONFIG_PROC_FS
1453 rpc_proc_register(&nfs_rpcstat
);
1455 if ((err
= register_nfs_fs()) != 0)
1459 #ifdef CONFIG_PROC_FS
1460 rpc_proc_unregister("nfs");
1462 nfs_destroy_directcache();
1464 nfs_destroy_writepagecache();
1466 nfs_destroy_readpagecache();
1468 nfs_destroy_inodecache();
1470 nfs_destroy_nfspagecache();
1476 nfs_fscache_unregister();
1478 nfs_dns_resolver_destroy();
1483 static void __exit
exit_nfs_fs(void)
1485 nfs_destroy_directcache();
1486 nfs_destroy_writepagecache();
1487 nfs_destroy_readpagecache();
1488 nfs_destroy_inodecache();
1489 nfs_destroy_nfspagecache();
1490 nfs_fscache_unregister();
1491 nfs_dns_resolver_destroy();
1492 #ifdef CONFIG_PROC_FS
1493 rpc_proc_unregister("nfs");
1495 unregister_nfs_fs();
1500 /* Not quite true; I just maintain it */
1501 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1502 MODULE_LICENSE("GPL");
1503 module_param(enable_ino64
, bool, 0644);
1505 module_init(init_nfs_fs
)
1506 module_exit(exit_nfs_fs
)