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>
41 #include <linux/freezer.h>
43 #include <asm/system.h>
44 #include <asm/uaccess.h>
48 #include "delegation.h"
52 #include "dns_resolve.h"
55 #define NFSDBG_FACILITY NFSDBG_VFS
57 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
59 /* Default is to see 64-bit inode numbers */
60 static int enable_ino64
= NFS_64_BIT_INODE_NUMBERS_ENABLED
;
62 static void nfs_invalidate_inode(struct inode
*);
63 static int nfs_update_inode(struct inode
*, struct nfs_fattr
*);
65 static struct kmem_cache
* nfs_inode_cachep
;
67 static inline unsigned long
68 nfs_fattr_to_ino_t(struct nfs_fattr
*fattr
)
70 return nfs_fileid_to_ino_t(fattr
->fileid
);
74 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
75 * @word: long word containing the bit lock
77 int nfs_wait_bit_killable(void *word
)
79 if (fatal_signal_pending(current
))
86 * nfs_compat_user_ino64 - returns the user-visible inode number
87 * @fileid: 64-bit fileid
89 * This function returns a 32-bit inode number if the boot parameter
90 * nfs.enable_ino64 is zero.
92 u64
nfs_compat_user_ino64(u64 fileid
)
103 if (sizeof(ino
) < sizeof(fileid
))
104 ino
^= fileid
>> (sizeof(fileid
)-sizeof(ino
)) * 8;
108 static void nfs_clear_inode(struct inode
*inode
)
111 * The following should never happen...
113 BUG_ON(nfs_have_writebacks(inode
));
114 BUG_ON(!list_empty(&NFS_I(inode
)->open_files
));
115 nfs_zap_acl_cache(inode
);
116 nfs_access_zap_cache(inode
);
117 nfs_fscache_release_inode_cookie(inode
);
120 void nfs_evict_inode(struct inode
*inode
)
122 truncate_inode_pages(&inode
->i_data
, 0);
123 end_writeback(inode
);
124 nfs_clear_inode(inode
);
128 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
130 int nfs_sync_mapping(struct address_space
*mapping
)
134 if (mapping
->nrpages
!= 0) {
135 unmap_mapping_range(mapping
, 0, 0, 0);
136 ret
= nfs_wb_all(mapping
->host
);
142 * Invalidate the local caches
144 static void nfs_zap_caches_locked(struct inode
*inode
)
146 struct nfs_inode
*nfsi
= NFS_I(inode
);
147 int mode
= inode
->i_mode
;
149 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
151 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
152 nfsi
->attrtimeo_timestamp
= jiffies
;
154 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
155 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
156 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
158 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
161 void nfs_zap_caches(struct inode
*inode
)
163 spin_lock(&inode
->i_lock
);
164 nfs_zap_caches_locked(inode
);
165 spin_unlock(&inode
->i_lock
);
168 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
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
);
177 void nfs_zap_acl_cache(struct inode
*inode
)
179 void (*clear_acl_cache
)(struct inode
*);
181 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
182 if (clear_acl_cache
!= NULL
)
183 clear_acl_cache(inode
);
184 spin_lock(&inode
->i_lock
);
185 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
186 spin_unlock(&inode
->i_lock
);
189 void nfs_invalidate_atime(struct inode
*inode
)
191 spin_lock(&inode
->i_lock
);
192 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATIME
;
193 spin_unlock(&inode
->i_lock
);
197 * Invalidate, but do not unhash, the inode.
198 * NB: must be called with inode->i_lock held!
200 static void nfs_invalidate_inode(struct inode
*inode
)
202 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
203 nfs_zap_caches_locked(inode
);
206 struct nfs_find_desc
{
208 struct nfs_fattr
*fattr
;
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
218 nfs_find_actor(struct inode
*inode
, void *opaque
)
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
;
224 if (NFS_FILEID(inode
) != fattr
->fileid
)
226 if (nfs_compare_fh(NFS_FH(inode
), fh
))
228 if (is_bad_inode(inode
) || NFS_STALE(inode
))
234 nfs_init_locked(struct inode
*inode
, void *opaque
)
236 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
237 struct nfs_fattr
*fattr
= desc
->fattr
;
239 set_nfs_fileid(inode
, fattr
->fileid
);
240 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
245 * This is our front-end to iget that looks up inodes by file handle
246 * instead of inode number.
249 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
251 struct nfs_find_desc desc
= {
255 struct inode
*inode
= ERR_PTR(-ENOENT
);
258 nfs_attr_check_mountpoint(sb
, fattr
);
260 if (((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0) &&
261 !nfs_attr_use_mounted_on_fileid(fattr
))
263 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
266 hash
= nfs_fattr_to_ino_t(fattr
);
268 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
270 inode
= ERR_PTR(-ENOMEM
);
274 if (inode
->i_state
& I_NEW
) {
275 struct nfs_inode
*nfsi
= NFS_I(inode
);
276 unsigned long now
= jiffies
;
278 /* We set i_ino for the few things that still rely on it,
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
;
285 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
286 && nfs_server_capable(inode
, NFS_CAP_MODE
))
287 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
288 | NFS_INO_INVALID_ACCESS
289 | NFS_INO_INVALID_ACL
;
290 /* Why so? Because we want revalidate for devices/FIFOs, and
291 * that's precisely what we have in nfs_file_inode_operations.
293 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
294 if (S_ISREG(inode
->i_mode
)) {
295 inode
->i_fop
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_ops
;
296 inode
->i_data
.a_ops
= &nfs_file_aops
;
297 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
298 } else if (S_ISDIR(inode
->i_mode
)) {
299 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
300 inode
->i_fop
= &nfs_dir_operations
;
301 inode
->i_data
.a_ops
= &nfs_dir_aops
;
302 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
))
303 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_I(inode
)->flags
);
304 /* Deal with crossing mountpoints */
305 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTPOINT
||
306 fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
) {
307 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
308 inode
->i_op
= &nfs_referral_inode_operations
;
310 inode
->i_op
= &nfs_mountpoint_inode_operations
;
312 inode
->i_flags
|= S_AUTOMOUNT
;
314 } else if (S_ISLNK(inode
->i_mode
))
315 inode
->i_op
= &nfs_symlink_inode_operations
;
317 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
319 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
320 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
321 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
322 inode
->i_version
= 0;
328 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
330 nfsi
->read_cache_jiffies
= fattr
->time_start
;
331 nfsi
->attr_gencount
= fattr
->gencount
;
332 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
333 inode
->i_atime
= fattr
->atime
;
334 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
335 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
336 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
337 inode
->i_mtime
= fattr
->mtime
;
338 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
339 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
340 | NFS_INO_INVALID_DATA
;
341 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
342 inode
->i_ctime
= fattr
->ctime
;
343 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
344 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
345 | NFS_INO_INVALID_ACCESS
346 | NFS_INO_INVALID_ACL
;
347 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
348 inode
->i_version
= fattr
->change_attr
;
349 else if (nfs_server_capable(inode
, NFS_CAP_CHANGE_ATTR
))
350 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
351 | NFS_INO_INVALID_DATA
;
352 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
353 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
355 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
356 | NFS_INO_INVALID_DATA
357 | NFS_INO_REVAL_PAGECACHE
;
358 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
359 set_nlink(inode
, fattr
->nlink
);
360 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
361 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
362 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
363 inode
->i_uid
= fattr
->uid
;
364 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
365 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
366 | NFS_INO_INVALID_ACCESS
367 | NFS_INO_INVALID_ACL
;
368 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
369 inode
->i_gid
= fattr
->gid
;
370 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
371 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
372 | NFS_INO_INVALID_ACCESS
373 | NFS_INO_INVALID_ACL
;
374 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
375 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
376 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
378 * report the blocks in 512byte units
380 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
382 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
383 nfsi
->attrtimeo_timestamp
= now
;
384 nfsi
->access_cache
= RB_ROOT
;
386 nfs_fscache_init_inode_cookie(inode
);
388 unlock_new_inode(inode
);
390 nfs_refresh_inode(inode
, fattr
);
391 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
393 (long long)NFS_FILEID(inode
),
394 atomic_read(&inode
->i_count
));
400 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
404 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
407 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
409 struct inode
*inode
= dentry
->d_inode
;
410 struct nfs_fattr
*fattr
;
413 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
415 /* skip mode change if it's just for clearing setuid/setgid */
416 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
417 attr
->ia_valid
&= ~ATTR_MODE
;
419 if (attr
->ia_valid
& ATTR_SIZE
) {
420 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
421 attr
->ia_valid
&= ~ATTR_SIZE
;
424 /* Optimization: if the end result is no change, don't RPC */
425 attr
->ia_valid
&= NFS_VALID_ATTRS
;
426 if ((attr
->ia_valid
& ~ATTR_FILE
) == 0)
429 /* Write all dirty data */
430 if (S_ISREG(inode
->i_mode
))
433 fattr
= nfs_alloc_fattr();
437 * Return any delegations if we're going to change ACLs
439 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
440 nfs_inode_return_delegation(inode
);
441 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
443 nfs_refresh_inode(inode
, fattr
);
444 nfs_free_fattr(fattr
);
450 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
451 * @inode: inode of the file used
452 * @offset: file offset to start truncating
454 * This is a copy of the common vmtruncate, but with the locking
455 * corrected to take into account the fact that NFS requires
456 * inode->i_size to be updated under the inode->i_lock.
458 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
463 err
= inode_newsize_ok(inode
, offset
);
467 spin_lock(&inode
->i_lock
);
468 oldsize
= inode
->i_size
;
469 i_size_write(inode
, offset
);
470 spin_unlock(&inode
->i_lock
);
472 truncate_pagecache(inode
, oldsize
, offset
);
478 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
479 * @inode: pointer to struct inode
480 * @attr: pointer to struct iattr
482 * Note: we do this in the *proc.c in order to ensure that
483 * it works for things like exclusive creates too.
485 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
487 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
488 spin_lock(&inode
->i_lock
);
489 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
490 int mode
= attr
->ia_mode
& S_IALLUGO
;
491 mode
|= inode
->i_mode
& ~S_IALLUGO
;
492 inode
->i_mode
= mode
;
494 if ((attr
->ia_valid
& ATTR_UID
) != 0)
495 inode
->i_uid
= attr
->ia_uid
;
496 if ((attr
->ia_valid
& ATTR_GID
) != 0)
497 inode
->i_gid
= attr
->ia_gid
;
498 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
499 spin_unlock(&inode
->i_lock
);
501 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
502 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
503 nfs_vmtruncate(inode
, attr
->ia_size
);
507 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
509 struct inode
*inode
= dentry
->d_inode
;
510 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
513 /* Flush out writes to the server in order to update c/mtime. */
514 if (S_ISREG(inode
->i_mode
)) {
515 err
= filemap_write_and_wait(inode
->i_mapping
);
521 * We may force a getattr if the user cares about atime.
523 * Note that we only have to check the vfsmount flags here:
524 * - NFS always sets S_NOATIME by so checking it would give a
526 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
527 * no point in checking those.
529 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
530 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
534 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
536 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
538 generic_fillattr(inode
, stat
);
539 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
545 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
547 atomic_set(&l_ctx
->count
, 1);
548 l_ctx
->lockowner
= current
->files
;
549 l_ctx
->pid
= current
->tgid
;
550 INIT_LIST_HEAD(&l_ctx
->list
);
553 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
555 struct nfs_lock_context
*pos
;
557 list_for_each_entry(pos
, &ctx
->lock_context
.list
, list
) {
558 if (pos
->lockowner
!= current
->files
)
560 if (pos
->pid
!= current
->tgid
)
562 atomic_inc(&pos
->count
);
568 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
570 struct nfs_lock_context
*res
, *new = NULL
;
571 struct inode
*inode
= ctx
->dentry
->d_inode
;
573 spin_lock(&inode
->i_lock
);
574 res
= __nfs_find_lock_context(ctx
);
576 spin_unlock(&inode
->i_lock
);
577 new = kmalloc(sizeof(*new), GFP_KERNEL
);
580 nfs_init_lock_context(new);
581 spin_lock(&inode
->i_lock
);
582 res
= __nfs_find_lock_context(ctx
);
584 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
585 new->open_context
= ctx
;
590 spin_unlock(&inode
->i_lock
);
595 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
597 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
598 struct inode
*inode
= ctx
->dentry
->d_inode
;
600 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
602 list_del(&l_ctx
->list
);
603 spin_unlock(&inode
->i_lock
);
608 * nfs_close_context - Common close_context() routine NFSv2/v3
609 * @ctx: pointer to context
610 * @is_sync: is this a synchronous close
612 * always ensure that the attributes are up to date if we're mounted
613 * with close-to-open semantics
615 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
618 struct nfs_server
*server
;
620 if (!(ctx
->mode
& FMODE_WRITE
))
624 inode
= ctx
->dentry
->d_inode
;
625 if (!list_empty(&NFS_I(inode
)->open_files
))
627 server
= NFS_SERVER(inode
);
628 if (server
->flags
& NFS_MOUNT_NOCTO
)
630 nfs_revalidate_inode(server
, inode
);
633 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, fmode_t f_mode
)
635 struct nfs_open_context
*ctx
;
636 struct rpc_cred
*cred
= rpc_lookup_cred();
638 return ERR_CAST(cred
);
640 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
643 return ERR_PTR(-ENOMEM
);
645 nfs_sb_active(dentry
->d_sb
);
646 ctx
->dentry
= dget(dentry
);
652 nfs_init_lock_context(&ctx
->lock_context
);
653 ctx
->lock_context
.open_context
= ctx
;
654 INIT_LIST_HEAD(&ctx
->list
);
658 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
661 atomic_inc(&ctx
->lock_context
.count
);
665 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
667 struct inode
*inode
= ctx
->dentry
->d_inode
;
668 struct super_block
*sb
= ctx
->dentry
->d_sb
;
670 if (!list_empty(&ctx
->list
)) {
671 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
673 list_del(&ctx
->list
);
674 spin_unlock(&inode
->i_lock
);
675 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
678 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
679 if (ctx
->cred
!= NULL
)
680 put_rpccred(ctx
->cred
);
686 void put_nfs_open_context(struct nfs_open_context
*ctx
)
688 __put_nfs_open_context(ctx
, 0);
692 * Ensure that mmap has a recent RPC credential for use when writing out
695 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
697 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
698 struct nfs_inode
*nfsi
= NFS_I(inode
);
700 filp
->private_data
= get_nfs_open_context(ctx
);
701 spin_lock(&inode
->i_lock
);
702 list_add(&ctx
->list
, &nfsi
->open_files
);
703 spin_unlock(&inode
->i_lock
);
707 * Given an inode, search for an open context with the desired characteristics
709 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
711 struct nfs_inode
*nfsi
= NFS_I(inode
);
712 struct nfs_open_context
*pos
, *ctx
= NULL
;
714 spin_lock(&inode
->i_lock
);
715 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
716 if (cred
!= NULL
&& pos
->cred
!= cred
)
718 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
720 ctx
= get_nfs_open_context(pos
);
723 spin_unlock(&inode
->i_lock
);
727 static void nfs_file_clear_open_context(struct file
*filp
)
729 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
730 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
733 filp
->private_data
= NULL
;
734 spin_lock(&inode
->i_lock
);
735 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
736 spin_unlock(&inode
->i_lock
);
737 __put_nfs_open_context(ctx
, filp
->f_flags
& O_DIRECT
? 0 : 1);
742 * These allocate and release file read/write context information.
744 int nfs_open(struct inode
*inode
, struct file
*filp
)
746 struct nfs_open_context
*ctx
;
748 ctx
= alloc_nfs_open_context(filp
->f_path
.dentry
, filp
->f_mode
);
751 nfs_file_set_open_context(filp
, ctx
);
752 put_nfs_open_context(ctx
);
753 nfs_fscache_set_inode_cookie(inode
, filp
);
757 int nfs_release(struct inode
*inode
, struct file
*filp
)
759 nfs_file_clear_open_context(filp
);
764 * This function is called whenever some part of NFS notices that
765 * the cached attributes have to be refreshed.
768 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
770 int status
= -ESTALE
;
771 struct nfs_fattr
*fattr
= NULL
;
772 struct nfs_inode
*nfsi
= NFS_I(inode
);
774 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
775 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
777 if (is_bad_inode(inode
))
779 if (NFS_STALE(inode
))
783 fattr
= nfs_alloc_fattr();
787 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
788 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
);
790 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
792 (long long)NFS_FILEID(inode
), status
);
793 if (status
== -ESTALE
) {
794 nfs_zap_caches(inode
);
795 if (!S_ISDIR(inode
->i_mode
))
796 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
801 status
= nfs_refresh_inode(inode
, fattr
);
803 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
805 (long long)NFS_FILEID(inode
), status
);
809 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
810 nfs_zap_acl_cache(inode
);
812 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
814 (long long)NFS_FILEID(inode
));
817 nfs_free_fattr(fattr
);
821 int nfs_attribute_timeout(struct inode
*inode
)
823 struct nfs_inode
*nfsi
= NFS_I(inode
);
825 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
828 static int nfs_attribute_cache_expired(struct inode
*inode
)
830 if (nfs_have_delegated_attributes(inode
))
832 return nfs_attribute_timeout(inode
);
836 * nfs_revalidate_inode - Revalidate the inode attributes
837 * @server - pointer to nfs_server struct
838 * @inode - pointer to inode struct
840 * Updates inode attribute information by retrieving the data from the server.
842 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
844 if (!(NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATTR
)
845 && !nfs_attribute_cache_expired(inode
))
846 return NFS_STALE(inode
) ? -ESTALE
: 0;
847 return __nfs_revalidate_inode(server
, inode
);
850 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
852 struct nfs_inode
*nfsi
= NFS_I(inode
);
854 if (mapping
->nrpages
!= 0) {
855 int ret
= invalidate_inode_pages2(mapping
);
859 spin_lock(&inode
->i_lock
);
860 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
861 if (S_ISDIR(inode
->i_mode
))
862 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
863 spin_unlock(&inode
->i_lock
);
864 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
865 nfs_fscache_reset_inode_cookie(inode
);
866 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
867 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
872 * nfs_revalidate_mapping - Revalidate the pagecache
873 * @inode - pointer to host inode
874 * @mapping - pointer to mapping
876 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
878 struct nfs_inode
*nfsi
= NFS_I(inode
);
881 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
882 || nfs_attribute_cache_expired(inode
)
883 || NFS_STALE(inode
)) {
884 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
888 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
889 ret
= nfs_invalidate_mapping(inode
, mapping
);
894 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
896 struct nfs_inode
*nfsi
= NFS_I(inode
);
897 unsigned long ret
= 0;
899 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
900 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
901 && inode
->i_version
== fattr
->pre_change_attr
) {
902 inode
->i_version
= fattr
->change_attr
;
903 if (S_ISDIR(inode
->i_mode
))
904 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
905 ret
|= NFS_INO_INVALID_ATTR
;
907 /* If we have atomic WCC data, we may update some attributes */
908 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
909 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
910 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
911 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
912 ret
|= NFS_INO_INVALID_ATTR
;
915 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
916 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
917 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
918 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
919 if (S_ISDIR(inode
->i_mode
))
920 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
921 ret
|= NFS_INO_INVALID_ATTR
;
923 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
924 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
925 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
926 && nfsi
->npages
== 0) {
927 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
928 ret
|= NFS_INO_INVALID_ATTR
;
934 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
935 * @inode - pointer to inode
936 * @fattr - updated attributes
938 * Verifies the attribute cache. If we have just changed the attributes,
939 * so that fattr carries weak cache consistency data, then it may
940 * also update the ctime/mtime/change_attribute.
942 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
944 struct nfs_inode
*nfsi
= NFS_I(inode
);
945 loff_t cur_size
, new_isize
;
946 unsigned long invalid
= 0;
949 /* Has the inode gone and changed behind our back? */
950 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
952 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
955 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
956 inode
->i_version
!= fattr
->change_attr
)
957 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
959 /* Verify a few of the more important attributes */
960 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
961 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
963 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
964 cur_size
= i_size_read(inode
);
965 new_isize
= nfs_size_to_loff_t(fattr
->size
);
966 if (cur_size
!= new_isize
&& nfsi
->npages
== 0)
967 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
970 /* Have any file permissions changed? */
971 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
972 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
973 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && inode
->i_uid
!= fattr
->uid
)
974 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
975 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && inode
->i_gid
!= fattr
->gid
)
976 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
978 /* Has the link count changed? */
979 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
980 invalid
|= NFS_INO_INVALID_ATTR
;
982 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
983 invalid
|= NFS_INO_INVALID_ATIME
;
986 nfsi
->cache_validity
|= invalid
;
988 nfsi
->read_cache_jiffies
= fattr
->time_start
;
992 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
994 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
996 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
999 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1001 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
1003 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
1006 static atomic_long_t nfs_attr_generation_counter
;
1008 static unsigned long nfs_read_attr_generation_counter(void)
1010 return atomic_long_read(&nfs_attr_generation_counter
);
1013 unsigned long nfs_inc_attr_generation_counter(void)
1015 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1018 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1021 fattr
->time_start
= jiffies
;
1022 fattr
->gencount
= nfs_inc_attr_generation_counter();
1025 struct nfs_fattr
*nfs_alloc_fattr(void)
1027 struct nfs_fattr
*fattr
;
1029 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1031 nfs_fattr_init(fattr
);
1035 struct nfs_fh
*nfs_alloc_fhandle(void)
1039 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1046 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1047 * @inode - pointer to inode
1048 * @fattr - attributes
1050 * Attempt to divine whether or not an RPC call reply carrying stale
1051 * attributes got scheduled after another call carrying updated ones.
1053 * To do so, the function first assumes that a more recent ctime means
1054 * that the attributes in fattr are newer, however it also attempt to
1055 * catch the case where ctime either didn't change, or went backwards
1056 * (if someone reset the clock on the server) by looking at whether
1057 * or not this RPC call was started after the inode was last updated.
1058 * Note also the check for wraparound of 'attr_gencount'
1060 * The function returns 'true' if it thinks the attributes in 'fattr' are
1061 * more recent than the ones cached in the inode.
1064 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1066 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1068 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1069 nfs_ctime_need_update(inode
, fattr
) ||
1070 nfs_size_need_update(inode
, fattr
) ||
1071 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1074 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1076 if (nfs_inode_attrs_need_update(inode
, fattr
))
1077 return nfs_update_inode(inode
, fattr
);
1078 return nfs_check_inode_attributes(inode
, fattr
);
1082 * nfs_refresh_inode - try to update the inode attribute cache
1083 * @inode - pointer to inode
1084 * @fattr - updated attributes
1086 * Check that an RPC call that returned attributes has not overlapped with
1087 * other recent updates of the inode metadata, then decide whether it is
1088 * safe to do a full update of the inode attributes, or whether just to
1089 * call nfs_check_inode_attributes.
1091 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1095 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1097 spin_lock(&inode
->i_lock
);
1098 status
= nfs_refresh_inode_locked(inode
, fattr
);
1099 spin_unlock(&inode
->i_lock
);
1104 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1106 struct nfs_inode
*nfsi
= NFS_I(inode
);
1108 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1109 if (S_ISDIR(inode
->i_mode
))
1110 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1111 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1113 return nfs_refresh_inode_locked(inode
, fattr
);
1117 * nfs_post_op_update_inode - try to update the inode attribute cache
1118 * @inode - pointer to inode
1119 * @fattr - updated attributes
1121 * After an operation that has changed the inode metadata, mark the
1122 * attribute cache as being invalid, then try to update it.
1124 * NB: if the server didn't return any post op attributes, this
1125 * function will force the retrieval of attributes before the next
1126 * NFS request. Thus it should be used only for operations that
1127 * are expected to change one or more attributes, to avoid
1128 * unnecessary NFS requests and trips through nfs_update_inode().
1130 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1134 spin_lock(&inode
->i_lock
);
1135 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1136 spin_unlock(&inode
->i_lock
);
1141 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1142 * @inode - pointer to inode
1143 * @fattr - updated attributes
1145 * After an operation that has changed the inode metadata, mark the
1146 * attribute cache as being invalid, then try to update it. Fake up
1147 * weak cache consistency data, if none exist.
1149 * This function is mainly designed to be used by the ->write_done() functions.
1151 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1155 spin_lock(&inode
->i_lock
);
1156 /* Don't do a WCC update if these attributes are already stale */
1157 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1158 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1159 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1160 | NFS_ATTR_FATTR_PRESIZE
1161 | NFS_ATTR_FATTR_PREMTIME
1162 | NFS_ATTR_FATTR_PRECTIME
);
1165 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1166 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1167 fattr
->pre_change_attr
= inode
->i_version
;
1168 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1170 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1171 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1172 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1173 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1175 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1176 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1177 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1178 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1180 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1181 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1182 fattr
->pre_size
= i_size_read(inode
);
1183 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1186 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1187 spin_unlock(&inode
->i_lock
);
1192 * Many nfs protocol calls return the new file attributes after
1193 * an operation. Here we update the inode to reflect the state
1194 * of the server's inode.
1196 * This is a bit tricky because we have to make sure all dirty pages
1197 * have been sent off to the server before calling invalidate_inode_pages.
1198 * To make sure no other process adds more write requests while we try
1199 * our best to flush them, we make them sleep during the attribute refresh.
1201 * A very similar scenario holds for the dir cache.
1203 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1205 struct nfs_server
*server
;
1206 struct nfs_inode
*nfsi
= NFS_I(inode
);
1207 loff_t cur_isize
, new_isize
;
1208 unsigned long invalid
= 0;
1209 unsigned long now
= jiffies
;
1210 unsigned long save_cache_validity
;
1212 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1213 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1214 atomic_read(&inode
->i_count
), fattr
->valid
);
1216 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1220 * Make sure the inode's type hasn't changed.
1222 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1225 server
= NFS_SERVER(inode
);
1226 /* Update the fsid? */
1227 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1228 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1229 !IS_AUTOMOUNT(inode
))
1230 server
->fsid
= fattr
->fsid
;
1233 * Update the read time so we don't revalidate too often.
1235 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1237 save_cache_validity
= nfsi
->cache_validity
;
1238 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1239 | NFS_INO_INVALID_ATIME
1240 | NFS_INO_REVAL_FORCED
1241 | NFS_INO_REVAL_PAGECACHE
);
1243 /* Do atomic weak cache consistency updates */
1244 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1246 /* More cache consistency checks */
1247 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1248 if (inode
->i_version
!= fattr
->change_attr
) {
1249 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1250 inode
->i_sb
->s_id
, inode
->i_ino
);
1251 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1252 if (S_ISDIR(inode
->i_mode
))
1253 nfs_force_lookup_revalidate(inode
);
1254 inode
->i_version
= fattr
->change_attr
;
1256 } else if (server
->caps
& NFS_CAP_CHANGE_ATTR
)
1257 invalid
|= save_cache_validity
;
1259 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1260 /* NFSv2/v3: Check if the mtime agrees */
1261 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1262 dprintk("NFS: mtime change on server for file %s/%ld\n",
1263 inode
->i_sb
->s_id
, inode
->i_ino
);
1264 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1265 if (S_ISDIR(inode
->i_mode
))
1266 nfs_force_lookup_revalidate(inode
);
1267 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1269 } else if (server
->caps
& NFS_CAP_MTIME
)
1270 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1271 | NFS_INO_INVALID_DATA
1272 | NFS_INO_REVAL_PAGECACHE
1273 | NFS_INO_REVAL_FORCED
);
1275 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1276 /* If ctime has changed we should definitely clear access+acl caches */
1277 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1278 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1279 /* and probably clear data for a directory too as utimes can cause
1280 * havoc with our cache.
1282 if (S_ISDIR(inode
->i_mode
)) {
1283 invalid
|= NFS_INO_INVALID_DATA
;
1284 nfs_force_lookup_revalidate(inode
);
1286 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1288 } else if (server
->caps
& NFS_CAP_CTIME
)
1289 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1290 | NFS_INO_INVALID_ACCESS
1291 | NFS_INO_INVALID_ACL
1292 | NFS_INO_REVAL_FORCED
);
1294 /* Check if our cached file size is stale */
1295 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1296 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1297 cur_isize
= i_size_read(inode
);
1298 if (new_isize
!= cur_isize
) {
1299 /* Do we perhaps have any outstanding writes, or has
1300 * the file grown beyond our last write? */
1301 if ((nfsi
->npages
== 0 && !test_bit(NFS_INO_LAYOUTCOMMIT
, &nfsi
->flags
)) ||
1302 new_isize
> cur_isize
) {
1303 i_size_write(inode
, new_isize
);
1304 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1306 dprintk("NFS: isize change on server for file %s/%ld "
1310 (long long)cur_isize
,
1311 (long long)new_isize
);
1314 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1315 | NFS_INO_REVAL_PAGECACHE
1316 | NFS_INO_REVAL_FORCED
);
1319 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1320 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1321 else if (server
->caps
& NFS_CAP_ATIME
)
1322 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATIME
1323 | NFS_INO_REVAL_FORCED
);
1325 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1326 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1327 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1328 newmode
|= fattr
->mode
& S_IALLUGO
;
1329 inode
->i_mode
= newmode
;
1330 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1332 } else if (server
->caps
& NFS_CAP_MODE
)
1333 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1334 | NFS_INO_INVALID_ACCESS
1335 | NFS_INO_INVALID_ACL
1336 | NFS_INO_REVAL_FORCED
);
1338 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1339 if (inode
->i_uid
!= fattr
->uid
) {
1340 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1341 inode
->i_uid
= fattr
->uid
;
1343 } else if (server
->caps
& NFS_CAP_OWNER
)
1344 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1345 | NFS_INO_INVALID_ACCESS
1346 | NFS_INO_INVALID_ACL
1347 | NFS_INO_REVAL_FORCED
);
1349 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1350 if (inode
->i_gid
!= fattr
->gid
) {
1351 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1352 inode
->i_gid
= fattr
->gid
;
1354 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
)
1355 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1356 | NFS_INO_INVALID_ACCESS
1357 | NFS_INO_INVALID_ACL
1358 | NFS_INO_REVAL_FORCED
);
1360 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1361 if (inode
->i_nlink
!= fattr
->nlink
) {
1362 invalid
|= NFS_INO_INVALID_ATTR
;
1363 if (S_ISDIR(inode
->i_mode
))
1364 invalid
|= NFS_INO_INVALID_DATA
;
1365 set_nlink(inode
, fattr
->nlink
);
1367 } else if (server
->caps
& NFS_CAP_NLINK
)
1368 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1369 | NFS_INO_REVAL_FORCED
);
1371 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1373 * report the blocks in 512byte units
1375 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1377 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1378 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1380 /* Update attrtimeo value if we're out of the unstable period */
1381 if (invalid
& NFS_INO_INVALID_ATTR
) {
1382 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1383 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1384 nfsi
->attrtimeo_timestamp
= now
;
1385 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1387 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1388 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1389 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1390 nfsi
->attrtimeo_timestamp
= now
;
1393 invalid
&= ~NFS_INO_INVALID_ATTR
;
1394 /* Don't invalidate the data if we were to blame */
1395 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1396 || S_ISLNK(inode
->i_mode
)))
1397 invalid
&= ~NFS_INO_INVALID_DATA
;
1398 if (!nfs_have_delegation(inode
, FMODE_READ
) ||
1399 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1400 nfsi
->cache_validity
|= invalid
;
1405 * Big trouble! The inode has become a different object.
1407 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1408 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1411 * No need to worry about unhashing the dentry, as the
1412 * lookup validation will know that the inode is bad.
1413 * (But we fall through to invalidate the caches.)
1415 nfs_invalidate_inode(inode
);
1419 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1420 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1421 NFS_SERVER(inode
)->nfs_client
->cl_hostname
, inode
->i_sb
->s_id
,
1422 (long long)nfsi
->fileid
, (long long)fattr
->fileid
);
1427 #ifdef CONFIG_NFS_V4
1430 * Clean out any remaining NFSv4 state that might be left over due
1431 * to open() calls that passed nfs_atomic_lookup, but failed to call
1434 void nfs4_evict_inode(struct inode
*inode
)
1436 truncate_inode_pages(&inode
->i_data
, 0);
1437 end_writeback(inode
);
1438 pnfs_return_layout(inode
);
1439 pnfs_destroy_layout(NFS_I(inode
));
1440 /* If we are holding a delegation, return it! */
1441 nfs_inode_return_delegation_noreclaim(inode
);
1442 /* First call standard NFS clear_inode() code */
1443 nfs_clear_inode(inode
);
1447 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1449 struct nfs_inode
*nfsi
;
1450 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1454 nfsi
->cache_validity
= 0UL;
1455 #ifdef CONFIG_NFS_V3_ACL
1456 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
1457 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
1459 #ifdef CONFIG_NFS_V4
1460 nfsi
->nfs4_acl
= NULL
;
1461 #endif /* CONFIG_NFS_V4 */
1462 return &nfsi
->vfs_inode
;
1465 static void nfs_i_callback(struct rcu_head
*head
)
1467 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1468 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1471 void nfs_destroy_inode(struct inode
*inode
)
1473 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1476 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1478 #ifdef CONFIG_NFS_V4
1479 INIT_LIST_HEAD(&nfsi
->open_states
);
1480 nfsi
->delegation
= NULL
;
1481 nfsi
->delegation_state
= 0;
1482 init_rwsem(&nfsi
->rwsem
);
1483 nfsi
->layout
= NULL
;
1484 atomic_set(&nfsi
->commits_outstanding
, 0);
1488 static void init_once(void *foo
)
1490 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1492 inode_init_once(&nfsi
->vfs_inode
);
1493 INIT_LIST_HEAD(&nfsi
->open_files
);
1494 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1495 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1496 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
1499 atomic_set(&nfsi
->silly_count
, 1);
1500 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1501 init_waitqueue_head(&nfsi
->waitqueue
);
1502 nfs4_init_once(nfsi
);
1505 static int __init
nfs_init_inodecache(void)
1507 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1508 sizeof(struct nfs_inode
),
1509 0, (SLAB_RECLAIM_ACCOUNT
|
1512 if (nfs_inode_cachep
== NULL
)
1518 static void nfs_destroy_inodecache(void)
1520 kmem_cache_destroy(nfs_inode_cachep
);
1523 struct workqueue_struct
*nfsiod_workqueue
;
1526 * start up the nfsiod workqueue
1528 static int nfsiod_start(void)
1530 struct workqueue_struct
*wq
;
1531 dprintk("RPC: creating workqueue nfsiod\n");
1532 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
1535 nfsiod_workqueue
= wq
;
1540 * Destroy the nfsiod workqueue
1542 static void nfsiod_stop(void)
1544 struct workqueue_struct
*wq
;
1546 wq
= nfsiod_workqueue
;
1549 nfsiod_workqueue
= NULL
;
1550 destroy_workqueue(wq
);
1556 static int __init
init_nfs_fs(void)
1560 err
= nfs_idmap_init();
1564 err
= nfs_dns_resolver_init();
1568 err
= nfs_fscache_register();
1572 err
= nfsiod_start();
1576 err
= nfs_fs_proc_init();
1580 err
= nfs_init_nfspagecache();
1584 err
= nfs_init_inodecache();
1588 err
= nfs_init_readpagecache();
1592 err
= nfs_init_writepagecache();
1596 err
= nfs_init_directcache();
1600 #ifdef CONFIG_PROC_FS
1601 rpc_proc_register(&nfs_rpcstat
);
1603 if ((err
= register_nfs_fs()) != 0)
1607 #ifdef CONFIG_PROC_FS
1608 rpc_proc_unregister("nfs");
1610 nfs_destroy_directcache();
1612 nfs_destroy_writepagecache();
1614 nfs_destroy_readpagecache();
1616 nfs_destroy_inodecache();
1618 nfs_destroy_nfspagecache();
1624 nfs_fscache_unregister();
1626 nfs_dns_resolver_destroy();
1633 static void __exit
exit_nfs_fs(void)
1635 nfs_destroy_directcache();
1636 nfs_destroy_writepagecache();
1637 nfs_destroy_readpagecache();
1638 nfs_destroy_inodecache();
1639 nfs_destroy_nfspagecache();
1640 nfs_fscache_unregister();
1641 nfs_dns_resolver_destroy();
1643 #ifdef CONFIG_PROC_FS
1644 rpc_proc_unregister("nfs");
1646 nfs_cleanup_cb_ident_idr();
1647 unregister_nfs_fs();
1652 /* Not quite true; I just maintain it */
1653 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1654 MODULE_LICENSE("GPL");
1655 module_param(enable_ino64
, bool, 0644);
1657 module_init(init_nfs_fs
)
1658 module_exit(exit_nfs_fs
)