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>
39 #include <linux/slab.h>
40 #include <linux/compat.h>
42 #include <asm/system.h>
43 #include <asm/uaccess.h>
47 #include "delegation.h"
51 #include "dns_resolve.h"
54 #define NFSDBG_FACILITY NFSDBG_VFS
56 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
58 /* Default is to see 64-bit inode numbers */
59 static int enable_ino64
= NFS_64_BIT_INODE_NUMBERS_ENABLED
;
61 static void nfs_invalidate_inode(struct inode
*);
62 static int nfs_update_inode(struct inode
*, struct nfs_fattr
*);
64 static struct kmem_cache
* nfs_inode_cachep
;
66 static inline unsigned long
67 nfs_fattr_to_ino_t(struct nfs_fattr
*fattr
)
69 return nfs_fileid_to_ino_t(fattr
->fileid
);
73 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
74 * @word: long word containing the bit lock
76 int nfs_wait_bit_killable(void *word
)
78 if (fatal_signal_pending(current
))
85 * nfs_compat_user_ino64 - returns the user-visible inode number
86 * @fileid: 64-bit fileid
88 * This function returns a 32-bit inode number if the boot parameter
89 * nfs.enable_ino64 is zero.
91 u64
nfs_compat_user_ino64(u64 fileid
)
102 if (sizeof(ino
) < sizeof(fileid
))
103 ino
^= fileid
>> (sizeof(fileid
)-sizeof(ino
)) * 8;
107 static void nfs_clear_inode(struct inode
*inode
)
110 * The following should never happen...
112 BUG_ON(nfs_have_writebacks(inode
));
113 BUG_ON(!list_empty(&NFS_I(inode
)->open_files
));
114 nfs_zap_acl_cache(inode
);
115 nfs_access_zap_cache(inode
);
116 nfs_fscache_release_inode_cookie(inode
);
119 void nfs_evict_inode(struct inode
*inode
)
121 truncate_inode_pages(&inode
->i_data
, 0);
122 end_writeback(inode
);
123 nfs_clear_inode(inode
);
127 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
129 int nfs_sync_mapping(struct address_space
*mapping
)
133 if (mapping
->nrpages
!= 0) {
134 unmap_mapping_range(mapping
, 0, 0, 0);
135 ret
= nfs_wb_all(mapping
->host
);
141 * Invalidate the local caches
143 static void nfs_zap_caches_locked(struct inode
*inode
)
145 struct nfs_inode
*nfsi
= NFS_I(inode
);
146 int mode
= inode
->i_mode
;
148 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
150 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
151 nfsi
->attrtimeo_timestamp
= jiffies
;
153 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
154 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
155 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
157 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
160 void nfs_zap_caches(struct inode
*inode
)
162 spin_lock(&inode
->i_lock
);
163 nfs_zap_caches_locked(inode
);
164 spin_unlock(&inode
->i_lock
);
167 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
169 if (mapping
->nrpages
!= 0) {
170 spin_lock(&inode
->i_lock
);
171 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_DATA
;
172 spin_unlock(&inode
->i_lock
);
176 void nfs_zap_acl_cache(struct inode
*inode
)
178 void (*clear_acl_cache
)(struct inode
*);
180 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
181 if (clear_acl_cache
!= NULL
)
182 clear_acl_cache(inode
);
183 spin_lock(&inode
->i_lock
);
184 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
185 spin_unlock(&inode
->i_lock
);
188 void nfs_invalidate_atime(struct inode
*inode
)
190 spin_lock(&inode
->i_lock
);
191 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATIME
;
192 spin_unlock(&inode
->i_lock
);
196 * Invalidate, but do not unhash, the inode.
197 * NB: must be called with inode->i_lock held!
199 static void nfs_invalidate_inode(struct inode
*inode
)
201 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
202 nfs_zap_caches_locked(inode
);
205 struct nfs_find_desc
{
207 struct nfs_fattr
*fattr
;
211 * In NFSv3 we can have 64bit inode numbers. In order to support
212 * this, and re-exported directories (also seen in NFSv2)
213 * we are forced to allow 2 different inodes to have the same
217 nfs_find_actor(struct inode
*inode
, void *opaque
)
219 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
220 struct nfs_fh
*fh
= desc
->fh
;
221 struct nfs_fattr
*fattr
= desc
->fattr
;
223 if (NFS_FILEID(inode
) != fattr
->fileid
)
225 if (nfs_compare_fh(NFS_FH(inode
), fh
))
227 if (is_bad_inode(inode
) || NFS_STALE(inode
))
233 nfs_init_locked(struct inode
*inode
, void *opaque
)
235 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
236 struct nfs_fattr
*fattr
= desc
->fattr
;
238 set_nfs_fileid(inode
, fattr
->fileid
);
239 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
244 * This is our front-end to iget that looks up inodes by file handle
245 * instead of inode number.
248 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
250 struct nfs_find_desc desc
= {
254 struct inode
*inode
= ERR_PTR(-ENOENT
);
257 nfs_attr_check_mountpoint(sb
, fattr
);
259 if (((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0) &&
260 !nfs_attr_use_mounted_on_fileid(fattr
))
262 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
265 hash
= nfs_fattr_to_ino_t(fattr
);
267 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
269 inode
= ERR_PTR(-ENOMEM
);
273 if (inode
->i_state
& I_NEW
) {
274 struct nfs_inode
*nfsi
= NFS_I(inode
);
275 unsigned long now
= jiffies
;
277 /* We set i_ino for the few things that still rely on it,
281 /* We can't support update_atime(), since the server will reset it */
282 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
283 inode
->i_mode
= fattr
->mode
;
284 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
285 && nfs_server_capable(inode
, NFS_CAP_MODE
))
286 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
287 | NFS_INO_INVALID_ACCESS
288 | NFS_INO_INVALID_ACL
;
289 /* Why so? Because we want revalidate for devices/FIFOs, and
290 * that's precisely what we have in nfs_file_inode_operations.
292 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
293 if (S_ISREG(inode
->i_mode
)) {
294 inode
->i_fop
= &nfs_file_operations
;
295 inode
->i_data
.a_ops
= &nfs_file_aops
;
296 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
297 } else if (S_ISDIR(inode
->i_mode
)) {
298 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
299 inode
->i_fop
= &nfs_dir_operations
;
300 inode
->i_data
.a_ops
= &nfs_dir_aops
;
301 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
))
302 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_I(inode
)->flags
);
303 /* Deal with crossing mountpoints */
304 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTPOINT
||
305 fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
) {
306 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
307 inode
->i_op
= &nfs_referral_inode_operations
;
309 inode
->i_op
= &nfs_mountpoint_inode_operations
;
311 inode
->i_flags
|= S_AUTOMOUNT
;
313 } else if (S_ISLNK(inode
->i_mode
))
314 inode
->i_op
= &nfs_symlink_inode_operations
;
316 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
318 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
319 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
320 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
321 nfsi
->change_attr
= 0;
327 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
329 nfsi
->read_cache_jiffies
= fattr
->time_start
;
330 nfsi
->attr_gencount
= fattr
->gencount
;
331 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
332 inode
->i_atime
= fattr
->atime
;
333 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
334 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
335 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
336 inode
->i_mtime
= fattr
->mtime
;
337 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
338 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
339 | NFS_INO_INVALID_DATA
;
340 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
341 inode
->i_ctime
= fattr
->ctime
;
342 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
343 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
344 | NFS_INO_INVALID_ACCESS
345 | NFS_INO_INVALID_ACL
;
346 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
347 nfsi
->change_attr
= fattr
->change_attr
;
348 else if (nfs_server_capable(inode
, NFS_CAP_CHANGE_ATTR
))
349 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
350 | NFS_INO_INVALID_DATA
;
351 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
352 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
354 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
355 | NFS_INO_INVALID_DATA
356 | NFS_INO_REVAL_PAGECACHE
;
357 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
358 inode
->i_nlink
= fattr
->nlink
;
359 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
360 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
361 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
362 inode
->i_uid
= fattr
->uid
;
363 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
364 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
365 | NFS_INO_INVALID_ACCESS
366 | NFS_INO_INVALID_ACL
;
367 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
368 inode
->i_gid
= fattr
->gid
;
369 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
370 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
371 | NFS_INO_INVALID_ACCESS
372 | NFS_INO_INVALID_ACL
;
373 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
374 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
375 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
377 * report the blocks in 512byte units
379 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
381 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
382 nfsi
->attrtimeo_timestamp
= now
;
383 nfsi
->access_cache
= RB_ROOT
;
385 nfs_fscache_init_inode_cookie(inode
);
387 unlock_new_inode(inode
);
389 nfs_refresh_inode(inode
, fattr
);
390 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
392 (long long)NFS_FILEID(inode
),
393 atomic_read(&inode
->i_count
));
399 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
403 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
406 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
408 struct inode
*inode
= dentry
->d_inode
;
409 struct nfs_fattr
*fattr
;
412 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
414 /* skip mode change if it's just for clearing setuid/setgid */
415 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
416 attr
->ia_valid
&= ~ATTR_MODE
;
418 if (attr
->ia_valid
& ATTR_SIZE
) {
419 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
420 attr
->ia_valid
&= ~ATTR_SIZE
;
423 /* Optimization: if the end result is no change, don't RPC */
424 attr
->ia_valid
&= NFS_VALID_ATTRS
;
425 if ((attr
->ia_valid
& ~ATTR_FILE
) == 0)
428 /* Write all dirty data */
429 if (S_ISREG(inode
->i_mode
))
432 fattr
= nfs_alloc_fattr();
436 * Return any delegations if we're going to change ACLs
438 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
439 nfs_inode_return_delegation(inode
);
440 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
442 nfs_refresh_inode(inode
, fattr
);
443 nfs_free_fattr(fattr
);
449 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
450 * @inode: inode of the file used
451 * @offset: file offset to start truncating
453 * This is a copy of the common vmtruncate, but with the locking
454 * corrected to take into account the fact that NFS requires
455 * inode->i_size to be updated under the inode->i_lock.
457 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
462 err
= inode_newsize_ok(inode
, offset
);
466 spin_lock(&inode
->i_lock
);
467 oldsize
= inode
->i_size
;
468 i_size_write(inode
, offset
);
469 spin_unlock(&inode
->i_lock
);
471 truncate_pagecache(inode
, oldsize
, offset
);
477 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
478 * @inode: pointer to struct inode
479 * @attr: pointer to struct iattr
481 * Note: we do this in the *proc.c in order to ensure that
482 * it works for things like exclusive creates too.
484 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
486 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
487 spin_lock(&inode
->i_lock
);
488 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
489 int mode
= attr
->ia_mode
& S_IALLUGO
;
490 mode
|= inode
->i_mode
& ~S_IALLUGO
;
491 inode
->i_mode
= mode
;
493 if ((attr
->ia_valid
& ATTR_UID
) != 0)
494 inode
->i_uid
= attr
->ia_uid
;
495 if ((attr
->ia_valid
& ATTR_GID
) != 0)
496 inode
->i_gid
= attr
->ia_gid
;
497 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
498 spin_unlock(&inode
->i_lock
);
500 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
501 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
502 nfs_vmtruncate(inode
, attr
->ia_size
);
506 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
508 struct inode
*inode
= dentry
->d_inode
;
509 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
512 /* Flush out writes to the server in order to update c/mtime. */
513 if (S_ISREG(inode
->i_mode
)) {
514 err
= filemap_write_and_wait(inode
->i_mapping
);
520 * We may force a getattr if the user cares about atime.
522 * Note that we only have to check the vfsmount flags here:
523 * - NFS always sets S_NOATIME by so checking it would give a
525 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
526 * no point in checking those.
528 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
529 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
533 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
535 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
537 generic_fillattr(inode
, stat
);
538 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
544 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
546 atomic_set(&l_ctx
->count
, 1);
547 l_ctx
->lockowner
= current
->files
;
548 l_ctx
->pid
= current
->tgid
;
549 INIT_LIST_HEAD(&l_ctx
->list
);
552 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
554 struct nfs_lock_context
*pos
;
556 list_for_each_entry(pos
, &ctx
->lock_context
.list
, list
) {
557 if (pos
->lockowner
!= current
->files
)
559 if (pos
->pid
!= current
->tgid
)
561 atomic_inc(&pos
->count
);
567 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
569 struct nfs_lock_context
*res
, *new = NULL
;
570 struct inode
*inode
= ctx
->path
.dentry
->d_inode
;
572 spin_lock(&inode
->i_lock
);
573 res
= __nfs_find_lock_context(ctx
);
575 spin_unlock(&inode
->i_lock
);
576 new = kmalloc(sizeof(*new), GFP_KERNEL
);
579 nfs_init_lock_context(new);
580 spin_lock(&inode
->i_lock
);
581 res
= __nfs_find_lock_context(ctx
);
583 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
584 new->open_context
= ctx
;
589 spin_unlock(&inode
->i_lock
);
594 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
596 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
597 struct inode
*inode
= ctx
->path
.dentry
->d_inode
;
599 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
601 list_del(&l_ctx
->list
);
602 spin_unlock(&inode
->i_lock
);
607 * nfs_close_context - Common close_context() routine NFSv2/v3
608 * @ctx: pointer to context
609 * @is_sync: is this a synchronous close
611 * always ensure that the attributes are up to date if we're mounted
612 * with close-to-open semantics
614 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
617 struct nfs_server
*server
;
619 if (!(ctx
->mode
& FMODE_WRITE
))
623 inode
= ctx
->path
.dentry
->d_inode
;
624 if (!list_empty(&NFS_I(inode
)->open_files
))
626 server
= NFS_SERVER(inode
);
627 if (server
->flags
& NFS_MOUNT_NOCTO
)
629 nfs_revalidate_inode(server
, inode
);
632 struct nfs_open_context
*alloc_nfs_open_context(struct path
*path
, struct rpc_cred
*cred
, fmode_t f_mode
)
634 struct nfs_open_context
*ctx
;
636 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
639 path_get(&ctx
->path
);
640 ctx
->cred
= get_rpccred(cred
);
645 nfs_init_lock_context(&ctx
->lock_context
);
646 ctx
->lock_context
.open_context
= ctx
;
647 INIT_LIST_HEAD(&ctx
->list
);
652 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
655 atomic_inc(&ctx
->lock_context
.count
);
659 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
661 struct inode
*inode
= ctx
->path
.dentry
->d_inode
;
663 if (!list_empty(&ctx
->list
)) {
664 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
666 list_del(&ctx
->list
);
667 spin_unlock(&inode
->i_lock
);
668 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
671 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
672 if (ctx
->cred
!= NULL
)
673 put_rpccred(ctx
->cred
);
674 path_put(&ctx
->path
);
678 void put_nfs_open_context(struct nfs_open_context
*ctx
)
680 __put_nfs_open_context(ctx
, 0);
684 * Ensure that mmap has a recent RPC credential for use when writing out
687 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
689 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
690 struct nfs_inode
*nfsi
= NFS_I(inode
);
692 filp
->private_data
= get_nfs_open_context(ctx
);
693 spin_lock(&inode
->i_lock
);
694 list_add(&ctx
->list
, &nfsi
->open_files
);
695 spin_unlock(&inode
->i_lock
);
699 * Given an inode, search for an open context with the desired characteristics
701 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
703 struct nfs_inode
*nfsi
= NFS_I(inode
);
704 struct nfs_open_context
*pos
, *ctx
= NULL
;
706 spin_lock(&inode
->i_lock
);
707 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
708 if (cred
!= NULL
&& pos
->cred
!= cred
)
710 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
712 ctx
= get_nfs_open_context(pos
);
715 spin_unlock(&inode
->i_lock
);
719 static void nfs_file_clear_open_context(struct file
*filp
)
721 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
722 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
725 filp
->private_data
= NULL
;
726 spin_lock(&inode
->i_lock
);
727 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
728 spin_unlock(&inode
->i_lock
);
729 __put_nfs_open_context(ctx
, filp
->f_flags
& O_DIRECT
? 0 : 1);
734 * These allocate and release file read/write context information.
736 int nfs_open(struct inode
*inode
, struct file
*filp
)
738 struct nfs_open_context
*ctx
;
739 struct rpc_cred
*cred
;
741 cred
= rpc_lookup_cred();
743 return PTR_ERR(cred
);
744 ctx
= alloc_nfs_open_context(&filp
->f_path
, cred
, filp
->f_mode
);
748 nfs_file_set_open_context(filp
, ctx
);
749 put_nfs_open_context(ctx
);
750 nfs_fscache_set_inode_cookie(inode
, filp
);
754 int nfs_release(struct inode
*inode
, struct file
*filp
)
756 nfs_file_clear_open_context(filp
);
761 * This function is called whenever some part of NFS notices that
762 * the cached attributes have to be refreshed.
765 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
767 int status
= -ESTALE
;
768 struct nfs_fattr
*fattr
= NULL
;
769 struct nfs_inode
*nfsi
= NFS_I(inode
);
771 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
772 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
774 if (is_bad_inode(inode
))
776 if (NFS_STALE(inode
))
780 fattr
= nfs_alloc_fattr();
784 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
785 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
);
787 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
789 (long long)NFS_FILEID(inode
), status
);
790 if (status
== -ESTALE
) {
791 nfs_zap_caches(inode
);
792 if (!S_ISDIR(inode
->i_mode
))
793 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
798 status
= nfs_refresh_inode(inode
, fattr
);
800 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
802 (long long)NFS_FILEID(inode
), status
);
806 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
807 nfs_zap_acl_cache(inode
);
809 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
811 (long long)NFS_FILEID(inode
));
814 nfs_free_fattr(fattr
);
818 int nfs_attribute_timeout(struct inode
*inode
)
820 struct nfs_inode
*nfsi
= NFS_I(inode
);
822 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
825 static int nfs_attribute_cache_expired(struct inode
*inode
)
827 if (nfs_have_delegated_attributes(inode
))
829 return nfs_attribute_timeout(inode
);
833 * nfs_revalidate_inode - Revalidate the inode attributes
834 * @server - pointer to nfs_server struct
835 * @inode - pointer to inode struct
837 * Updates inode attribute information by retrieving the data from the server.
839 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
841 if (!(NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATTR
)
842 && !nfs_attribute_cache_expired(inode
))
843 return NFS_STALE(inode
) ? -ESTALE
: 0;
844 return __nfs_revalidate_inode(server
, inode
);
847 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
849 struct nfs_inode
*nfsi
= NFS_I(inode
);
851 if (mapping
->nrpages
!= 0) {
852 int ret
= invalidate_inode_pages2(mapping
);
856 spin_lock(&inode
->i_lock
);
857 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
858 if (S_ISDIR(inode
->i_mode
))
859 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
860 spin_unlock(&inode
->i_lock
);
861 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
862 nfs_fscache_reset_inode_cookie(inode
);
863 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
864 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
869 * nfs_revalidate_mapping - Revalidate the pagecache
870 * @inode - pointer to host inode
871 * @mapping - pointer to mapping
873 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
875 struct nfs_inode
*nfsi
= NFS_I(inode
);
878 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
879 || nfs_attribute_cache_expired(inode
)
880 || NFS_STALE(inode
)) {
881 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
885 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
886 ret
= nfs_invalidate_mapping(inode
, mapping
);
891 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
893 struct nfs_inode
*nfsi
= NFS_I(inode
);
894 unsigned long ret
= 0;
896 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
897 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
898 && nfsi
->change_attr
== fattr
->pre_change_attr
) {
899 nfsi
->change_attr
= fattr
->change_attr
;
900 if (S_ISDIR(inode
->i_mode
))
901 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
902 ret
|= NFS_INO_INVALID_ATTR
;
904 /* If we have atomic WCC data, we may update some attributes */
905 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
906 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
907 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
908 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
909 ret
|= NFS_INO_INVALID_ATTR
;
912 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
913 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
914 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
915 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
916 if (S_ISDIR(inode
->i_mode
))
917 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
918 ret
|= NFS_INO_INVALID_ATTR
;
920 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
921 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
922 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
923 && nfsi
->npages
== 0) {
924 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
925 ret
|= NFS_INO_INVALID_ATTR
;
931 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
932 * @inode - pointer to inode
933 * @fattr - updated attributes
935 * Verifies the attribute cache. If we have just changed the attributes,
936 * so that fattr carries weak cache consistency data, then it may
937 * also update the ctime/mtime/change_attribute.
939 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
941 struct nfs_inode
*nfsi
= NFS_I(inode
);
942 loff_t cur_size
, new_isize
;
943 unsigned long invalid
= 0;
946 /* Has the inode gone and changed behind our back? */
947 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
949 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
952 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
953 nfsi
->change_attr
!= fattr
->change_attr
)
954 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
956 /* Verify a few of the more important attributes */
957 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
958 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
960 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
961 cur_size
= i_size_read(inode
);
962 new_isize
= nfs_size_to_loff_t(fattr
->size
);
963 if (cur_size
!= new_isize
&& nfsi
->npages
== 0)
964 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
967 /* Have any file permissions changed? */
968 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
969 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
970 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && inode
->i_uid
!= fattr
->uid
)
971 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
972 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && inode
->i_gid
!= fattr
->gid
)
973 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
975 /* Has the link count changed? */
976 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
977 invalid
|= NFS_INO_INVALID_ATTR
;
979 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
980 invalid
|= NFS_INO_INVALID_ATIME
;
983 nfsi
->cache_validity
|= invalid
;
985 nfsi
->read_cache_jiffies
= fattr
->time_start
;
989 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
991 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
993 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
996 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
998 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
1000 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
1003 static atomic_long_t nfs_attr_generation_counter
;
1005 static unsigned long nfs_read_attr_generation_counter(void)
1007 return atomic_long_read(&nfs_attr_generation_counter
);
1010 unsigned long nfs_inc_attr_generation_counter(void)
1012 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1015 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1018 fattr
->time_start
= jiffies
;
1019 fattr
->gencount
= nfs_inc_attr_generation_counter();
1022 struct nfs_fattr
*nfs_alloc_fattr(void)
1024 struct nfs_fattr
*fattr
;
1026 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1028 nfs_fattr_init(fattr
);
1032 struct nfs_fh
*nfs_alloc_fhandle(void)
1036 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1043 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1044 * @inode - pointer to inode
1045 * @fattr - attributes
1047 * Attempt to divine whether or not an RPC call reply carrying stale
1048 * attributes got scheduled after another call carrying updated ones.
1050 * To do so, the function first assumes that a more recent ctime means
1051 * that the attributes in fattr are newer, however it also attempt to
1052 * catch the case where ctime either didn't change, or went backwards
1053 * (if someone reset the clock on the server) by looking at whether
1054 * or not this RPC call was started after the inode was last updated.
1055 * Note also the check for wraparound of 'attr_gencount'
1057 * The function returns 'true' if it thinks the attributes in 'fattr' are
1058 * more recent than the ones cached in the inode.
1061 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1063 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1065 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1066 nfs_ctime_need_update(inode
, fattr
) ||
1067 nfs_size_need_update(inode
, fattr
) ||
1068 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1071 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1073 if (nfs_inode_attrs_need_update(inode
, fattr
))
1074 return nfs_update_inode(inode
, fattr
);
1075 return nfs_check_inode_attributes(inode
, fattr
);
1079 * nfs_refresh_inode - try to update the inode attribute cache
1080 * @inode - pointer to inode
1081 * @fattr - updated attributes
1083 * Check that an RPC call that returned attributes has not overlapped with
1084 * other recent updates of the inode metadata, then decide whether it is
1085 * safe to do a full update of the inode attributes, or whether just to
1086 * call nfs_check_inode_attributes.
1088 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1092 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1094 spin_lock(&inode
->i_lock
);
1095 status
= nfs_refresh_inode_locked(inode
, fattr
);
1096 spin_unlock(&inode
->i_lock
);
1101 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1103 struct nfs_inode
*nfsi
= NFS_I(inode
);
1105 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1106 if (S_ISDIR(inode
->i_mode
))
1107 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1108 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1110 return nfs_refresh_inode_locked(inode
, fattr
);
1114 * nfs_post_op_update_inode - try to update the inode attribute cache
1115 * @inode - pointer to inode
1116 * @fattr - updated attributes
1118 * After an operation that has changed the inode metadata, mark the
1119 * attribute cache as being invalid, then try to update it.
1121 * NB: if the server didn't return any post op attributes, this
1122 * function will force the retrieval of attributes before the next
1123 * NFS request. Thus it should be used only for operations that
1124 * are expected to change one or more attributes, to avoid
1125 * unnecessary NFS requests and trips through nfs_update_inode().
1127 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1131 spin_lock(&inode
->i_lock
);
1132 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1133 spin_unlock(&inode
->i_lock
);
1138 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1139 * @inode - pointer to inode
1140 * @fattr - updated attributes
1142 * After an operation that has changed the inode metadata, mark the
1143 * attribute cache as being invalid, then try to update it. Fake up
1144 * weak cache consistency data, if none exist.
1146 * This function is mainly designed to be used by the ->write_done() functions.
1148 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1152 spin_lock(&inode
->i_lock
);
1153 /* Don't do a WCC update if these attributes are already stale */
1154 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1155 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1156 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1157 | NFS_ATTR_FATTR_PRESIZE
1158 | NFS_ATTR_FATTR_PREMTIME
1159 | NFS_ATTR_FATTR_PRECTIME
);
1162 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1163 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1164 fattr
->pre_change_attr
= NFS_I(inode
)->change_attr
;
1165 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1167 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1168 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1169 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1170 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1172 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1173 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1174 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1175 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1177 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1178 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1179 fattr
->pre_size
= i_size_read(inode
);
1180 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1183 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1184 spin_unlock(&inode
->i_lock
);
1189 * Many nfs protocol calls return the new file attributes after
1190 * an operation. Here we update the inode to reflect the state
1191 * of the server's inode.
1193 * This is a bit tricky because we have to make sure all dirty pages
1194 * have been sent off to the server before calling invalidate_inode_pages.
1195 * To make sure no other process adds more write requests while we try
1196 * our best to flush them, we make them sleep during the attribute refresh.
1198 * A very similar scenario holds for the dir cache.
1200 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1202 struct nfs_server
*server
;
1203 struct nfs_inode
*nfsi
= NFS_I(inode
);
1204 loff_t cur_isize
, new_isize
;
1205 unsigned long invalid
= 0;
1206 unsigned long now
= jiffies
;
1207 unsigned long save_cache_validity
;
1209 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1210 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1211 atomic_read(&inode
->i_count
), fattr
->valid
);
1213 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1217 * Make sure the inode's type hasn't changed.
1219 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1222 server
= NFS_SERVER(inode
);
1223 /* Update the fsid? */
1224 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1225 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1226 !IS_AUTOMOUNT(inode
))
1227 server
->fsid
= fattr
->fsid
;
1230 * Update the read time so we don't revalidate too often.
1232 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1234 save_cache_validity
= nfsi
->cache_validity
;
1235 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1236 | NFS_INO_INVALID_ATIME
1237 | NFS_INO_REVAL_FORCED
1238 | NFS_INO_REVAL_PAGECACHE
);
1240 /* Do atomic weak cache consistency updates */
1241 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1243 /* More cache consistency checks */
1244 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1245 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1246 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1247 inode
->i_sb
->s_id
, inode
->i_ino
);
1248 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1249 if (S_ISDIR(inode
->i_mode
))
1250 nfs_force_lookup_revalidate(inode
);
1251 nfsi
->change_attr
= fattr
->change_attr
;
1253 } else if (server
->caps
& NFS_CAP_CHANGE_ATTR
)
1254 invalid
|= save_cache_validity
;
1256 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1257 /* NFSv2/v3: Check if the mtime agrees */
1258 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1259 dprintk("NFS: mtime change on server for file %s/%ld\n",
1260 inode
->i_sb
->s_id
, inode
->i_ino
);
1261 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1262 if (S_ISDIR(inode
->i_mode
))
1263 nfs_force_lookup_revalidate(inode
);
1264 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1266 } else if (server
->caps
& NFS_CAP_MTIME
)
1267 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1268 | NFS_INO_INVALID_DATA
1269 | NFS_INO_REVAL_PAGECACHE
1270 | NFS_INO_REVAL_FORCED
);
1272 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1273 /* If ctime has changed we should definitely clear access+acl caches */
1274 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1275 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1276 /* and probably clear data for a directory too as utimes can cause
1277 * havoc with our cache.
1279 if (S_ISDIR(inode
->i_mode
)) {
1280 invalid
|= NFS_INO_INVALID_DATA
;
1281 nfs_force_lookup_revalidate(inode
);
1283 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1285 } else if (server
->caps
& NFS_CAP_CTIME
)
1286 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1287 | NFS_INO_INVALID_ACCESS
1288 | NFS_INO_INVALID_ACL
1289 | NFS_INO_REVAL_FORCED
);
1291 /* Check if our cached file size is stale */
1292 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1293 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1294 cur_isize
= i_size_read(inode
);
1295 if (new_isize
!= cur_isize
) {
1296 /* Do we perhaps have any outstanding writes, or has
1297 * the file grown beyond our last write? */
1298 if ((nfsi
->npages
== 0 && !test_bit(NFS_INO_LAYOUTCOMMIT
, &nfsi
->flags
)) ||
1299 new_isize
> cur_isize
) {
1300 i_size_write(inode
, new_isize
);
1301 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1303 dprintk("NFS: isize change on server for file %s/%ld "
1307 (long long)cur_isize
,
1308 (long long)new_isize
);
1311 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1312 | NFS_INO_REVAL_PAGECACHE
1313 | NFS_INO_REVAL_FORCED
);
1316 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1317 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1318 else if (server
->caps
& NFS_CAP_ATIME
)
1319 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATIME
1320 | NFS_INO_REVAL_FORCED
);
1322 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1323 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1324 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1325 newmode
|= fattr
->mode
& S_IALLUGO
;
1326 inode
->i_mode
= newmode
;
1327 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1329 } else if (server
->caps
& NFS_CAP_MODE
)
1330 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1331 | NFS_INO_INVALID_ACCESS
1332 | NFS_INO_INVALID_ACL
1333 | NFS_INO_REVAL_FORCED
);
1335 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1336 if (inode
->i_uid
!= fattr
->uid
) {
1337 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1338 inode
->i_uid
= fattr
->uid
;
1340 } else if (server
->caps
& NFS_CAP_OWNER
)
1341 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1342 | NFS_INO_INVALID_ACCESS
1343 | NFS_INO_INVALID_ACL
1344 | NFS_INO_REVAL_FORCED
);
1346 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1347 if (inode
->i_gid
!= fattr
->gid
) {
1348 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1349 inode
->i_gid
= fattr
->gid
;
1351 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
)
1352 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1353 | NFS_INO_INVALID_ACCESS
1354 | NFS_INO_INVALID_ACL
1355 | NFS_INO_REVAL_FORCED
);
1357 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1358 if (inode
->i_nlink
!= fattr
->nlink
) {
1359 invalid
|= NFS_INO_INVALID_ATTR
;
1360 if (S_ISDIR(inode
->i_mode
))
1361 invalid
|= NFS_INO_INVALID_DATA
;
1362 inode
->i_nlink
= fattr
->nlink
;
1364 } else if (server
->caps
& NFS_CAP_NLINK
)
1365 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1366 | NFS_INO_REVAL_FORCED
);
1368 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1370 * report the blocks in 512byte units
1372 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1374 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1375 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1377 /* Update attrtimeo value if we're out of the unstable period */
1378 if (invalid
& NFS_INO_INVALID_ATTR
) {
1379 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1380 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1381 nfsi
->attrtimeo_timestamp
= now
;
1382 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1384 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1385 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1386 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1387 nfsi
->attrtimeo_timestamp
= now
;
1390 invalid
&= ~NFS_INO_INVALID_ATTR
;
1391 /* Don't invalidate the data if we were to blame */
1392 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1393 || S_ISLNK(inode
->i_mode
)))
1394 invalid
&= ~NFS_INO_INVALID_DATA
;
1395 if (!nfs_have_delegation(inode
, FMODE_READ
) ||
1396 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1397 nfsi
->cache_validity
|= invalid
;
1402 * Big trouble! The inode has become a different object.
1404 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1405 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1408 * No need to worry about unhashing the dentry, as the
1409 * lookup validation will know that the inode is bad.
1410 * (But we fall through to invalidate the caches.)
1412 nfs_invalidate_inode(inode
);
1416 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1417 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1418 NFS_SERVER(inode
)->nfs_client
->cl_hostname
, inode
->i_sb
->s_id
,
1419 (long long)nfsi
->fileid
, (long long)fattr
->fileid
);
1424 #ifdef CONFIG_NFS_V4
1427 * Clean out any remaining NFSv4 state that might be left over due
1428 * to open() calls that passed nfs_atomic_lookup, but failed to call
1431 void nfs4_evict_inode(struct inode
*inode
)
1433 truncate_inode_pages(&inode
->i_data
, 0);
1434 end_writeback(inode
);
1435 pnfs_return_layout(inode
);
1436 pnfs_destroy_layout(NFS_I(inode
));
1437 /* If we are holding a delegation, return it! */
1438 nfs_inode_return_delegation_noreclaim(inode
);
1439 /* First call standard NFS clear_inode() code */
1440 nfs_clear_inode(inode
);
1444 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1446 struct nfs_inode
*nfsi
;
1447 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1451 nfsi
->cache_validity
= 0UL;
1452 #ifdef CONFIG_NFS_V3_ACL
1453 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
1454 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
1456 #ifdef CONFIG_NFS_V4
1457 nfsi
->nfs4_acl
= NULL
;
1458 #endif /* CONFIG_NFS_V4 */
1459 return &nfsi
->vfs_inode
;
1462 static void nfs_i_callback(struct rcu_head
*head
)
1464 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1465 INIT_LIST_HEAD(&inode
->i_dentry
);
1466 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1469 void nfs_destroy_inode(struct inode
*inode
)
1471 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1474 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1476 #ifdef CONFIG_NFS_V4
1477 INIT_LIST_HEAD(&nfsi
->open_states
);
1478 nfsi
->delegation
= NULL
;
1479 nfsi
->delegation_state
= 0;
1480 init_rwsem(&nfsi
->rwsem
);
1481 nfsi
->layout
= NULL
;
1482 atomic_set(&nfsi
->commits_outstanding
, 0);
1486 static void init_once(void *foo
)
1488 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1490 inode_init_once(&nfsi
->vfs_inode
);
1491 INIT_LIST_HEAD(&nfsi
->open_files
);
1492 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1493 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1494 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
1497 atomic_set(&nfsi
->silly_count
, 1);
1498 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1499 init_waitqueue_head(&nfsi
->waitqueue
);
1500 nfs4_init_once(nfsi
);
1503 static int __init
nfs_init_inodecache(void)
1505 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1506 sizeof(struct nfs_inode
),
1507 0, (SLAB_RECLAIM_ACCOUNT
|
1510 if (nfs_inode_cachep
== NULL
)
1516 static void nfs_destroy_inodecache(void)
1518 kmem_cache_destroy(nfs_inode_cachep
);
1521 struct workqueue_struct
*nfsiod_workqueue
;
1524 * start up the nfsiod workqueue
1526 static int nfsiod_start(void)
1528 struct workqueue_struct
*wq
;
1529 dprintk("RPC: creating workqueue nfsiod\n");
1530 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
1533 nfsiod_workqueue
= wq
;
1538 * Destroy the nfsiod workqueue
1540 static void nfsiod_stop(void)
1542 struct workqueue_struct
*wq
;
1544 wq
= nfsiod_workqueue
;
1547 nfsiod_workqueue
= NULL
;
1548 destroy_workqueue(wq
);
1554 static int __init
init_nfs_fs(void)
1558 err
= nfs_idmap_init();
1562 err
= nfs_dns_resolver_init();
1566 err
= nfs_fscache_register();
1570 err
= nfsiod_start();
1574 err
= nfs_fs_proc_init();
1578 err
= nfs_init_nfspagecache();
1582 err
= nfs_init_inodecache();
1586 err
= nfs_init_readpagecache();
1590 err
= nfs_init_writepagecache();
1594 err
= nfs_init_directcache();
1598 #ifdef CONFIG_PROC_FS
1599 rpc_proc_register(&nfs_rpcstat
);
1601 if ((err
= register_nfs_fs()) != 0)
1605 #ifdef CONFIG_PROC_FS
1606 rpc_proc_unregister("nfs");
1608 nfs_destroy_directcache();
1610 nfs_destroy_writepagecache();
1612 nfs_destroy_readpagecache();
1614 nfs_destroy_inodecache();
1616 nfs_destroy_nfspagecache();
1622 nfs_fscache_unregister();
1624 nfs_dns_resolver_destroy();
1631 static void __exit
exit_nfs_fs(void)
1633 nfs_destroy_directcache();
1634 nfs_destroy_writepagecache();
1635 nfs_destroy_readpagecache();
1636 nfs_destroy_inodecache();
1637 nfs_destroy_nfspagecache();
1638 nfs_fscache_unregister();
1639 nfs_dns_resolver_destroy();
1641 #ifdef CONFIG_PROC_FS
1642 rpc_proc_unregister("nfs");
1644 nfs_cleanup_cb_ident_idr();
1645 unregister_nfs_fs();
1650 /* Not quite true; I just maintain it */
1651 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1652 MODULE_LICENSE("GPL");
1653 module_param(enable_ino64
, bool, 0644);
1655 module_init(init_nfs_fs
)
1656 module_exit(exit_nfs_fs
)