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>
41 #include <asm/system.h>
42 #include <asm/uaccess.h>
46 #include "delegation.h"
50 #include "dns_resolve.h"
52 #define NFSDBG_FACILITY NFSDBG_VFS
54 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
56 /* Default is to see 64-bit inode numbers */
57 static int enable_ino64
= NFS_64_BIT_INODE_NUMBERS_ENABLED
;
59 static void nfs_invalidate_inode(struct inode
*);
60 static int nfs_update_inode(struct inode
*, struct nfs_fattr
*);
62 static struct kmem_cache
* nfs_inode_cachep
;
64 static inline unsigned long
65 nfs_fattr_to_ino_t(struct nfs_fattr
*fattr
)
67 return nfs_fileid_to_ino_t(fattr
->fileid
);
71 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
72 * @word: long word containing the bit lock
74 int nfs_wait_bit_killable(void *word
)
76 if (fatal_signal_pending(current
))
83 * nfs_compat_user_ino64 - returns the user-visible inode number
84 * @fileid: 64-bit fileid
86 * This function returns a 32-bit inode number if the boot parameter
87 * nfs.enable_ino64 is zero.
89 u64
nfs_compat_user_ino64(u64 fileid
)
96 if (sizeof(ino
) < sizeof(fileid
))
97 ino
^= fileid
>> (sizeof(fileid
)-sizeof(ino
)) * 8;
101 static void nfs_clear_inode(struct inode
*inode
)
104 * The following should never happen...
106 BUG_ON(nfs_have_writebacks(inode
));
107 BUG_ON(!list_empty(&NFS_I(inode
)->open_files
));
108 nfs_zap_acl_cache(inode
);
109 nfs_access_zap_cache(inode
);
110 nfs_fscache_release_inode_cookie(inode
);
113 void nfs_evict_inode(struct inode
*inode
)
115 truncate_inode_pages(&inode
->i_data
, 0);
116 end_writeback(inode
);
117 nfs_clear_inode(inode
);
121 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
123 int nfs_sync_mapping(struct address_space
*mapping
)
127 if (mapping
->nrpages
!= 0) {
128 unmap_mapping_range(mapping
, 0, 0, 0);
129 ret
= nfs_wb_all(mapping
->host
);
135 * Invalidate the local caches
137 static void nfs_zap_caches_locked(struct inode
*inode
)
139 struct nfs_inode
*nfsi
= NFS_I(inode
);
140 int mode
= inode
->i_mode
;
142 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
144 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
145 nfsi
->attrtimeo_timestamp
= jiffies
;
147 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
148 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
149 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
151 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
154 void nfs_zap_caches(struct inode
*inode
)
156 spin_lock(&inode
->i_lock
);
157 nfs_zap_caches_locked(inode
);
158 spin_unlock(&inode
->i_lock
);
161 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
163 if (mapping
->nrpages
!= 0) {
164 spin_lock(&inode
->i_lock
);
165 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_DATA
;
166 spin_unlock(&inode
->i_lock
);
170 void nfs_zap_acl_cache(struct inode
*inode
)
172 void (*clear_acl_cache
)(struct inode
*);
174 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
175 if (clear_acl_cache
!= NULL
)
176 clear_acl_cache(inode
);
177 spin_lock(&inode
->i_lock
);
178 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
179 spin_unlock(&inode
->i_lock
);
182 void nfs_invalidate_atime(struct inode
*inode
)
184 spin_lock(&inode
->i_lock
);
185 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATIME
;
186 spin_unlock(&inode
->i_lock
);
190 * Invalidate, but do not unhash, the inode.
191 * NB: must be called with inode->i_lock held!
193 static void nfs_invalidate_inode(struct inode
*inode
)
195 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
196 nfs_zap_caches_locked(inode
);
199 struct nfs_find_desc
{
201 struct nfs_fattr
*fattr
;
205 * In NFSv3 we can have 64bit inode numbers. In order to support
206 * this, and re-exported directories (also seen in NFSv2)
207 * we are forced to allow 2 different inodes to have the same
211 nfs_find_actor(struct inode
*inode
, void *opaque
)
213 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
214 struct nfs_fh
*fh
= desc
->fh
;
215 struct nfs_fattr
*fattr
= desc
->fattr
;
217 if (NFS_FILEID(inode
) != fattr
->fileid
)
219 if (nfs_compare_fh(NFS_FH(inode
), fh
))
221 if (is_bad_inode(inode
) || NFS_STALE(inode
))
227 nfs_init_locked(struct inode
*inode
, void *opaque
)
229 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
230 struct nfs_fattr
*fattr
= desc
->fattr
;
232 set_nfs_fileid(inode
, fattr
->fileid
);
233 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
237 /* Don't use READDIRPLUS on directories that we believe are too large */
238 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
241 * This is our front-end to iget that looks up inodes by file handle
242 * instead of inode number.
245 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
247 struct nfs_find_desc desc
= {
251 struct inode
*inode
= ERR_PTR(-ENOENT
);
254 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
256 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
259 hash
= nfs_fattr_to_ino_t(fattr
);
261 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
263 inode
= ERR_PTR(-ENOMEM
);
267 if (inode
->i_state
& I_NEW
) {
268 struct nfs_inode
*nfsi
= NFS_I(inode
);
269 unsigned long now
= jiffies
;
271 /* We set i_ino for the few things that still rely on it,
275 /* We can't support update_atime(), since the server will reset it */
276 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
277 inode
->i_mode
= fattr
->mode
;
278 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
279 && nfs_server_capable(inode
, NFS_CAP_MODE
))
280 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
281 | NFS_INO_INVALID_ACCESS
282 | NFS_INO_INVALID_ACL
;
283 /* Why so? Because we want revalidate for devices/FIFOs, and
284 * that's precisely what we have in nfs_file_inode_operations.
286 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
287 if (S_ISREG(inode
->i_mode
)) {
288 inode
->i_fop
= &nfs_file_operations
;
289 inode
->i_data
.a_ops
= &nfs_file_aops
;
290 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
291 } else if (S_ISDIR(inode
->i_mode
)) {
292 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
293 inode
->i_fop
= &nfs_dir_operations
;
294 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
295 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
296 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_I(inode
)->flags
);
297 /* Deal with crossing mountpoints */
298 if ((fattr
->valid
& NFS_ATTR_FATTR_FSID
)
299 && !nfs_fsid_equal(&NFS_SB(sb
)->fsid
, &fattr
->fsid
)) {
300 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
301 inode
->i_op
= &nfs_referral_inode_operations
;
303 inode
->i_op
= &nfs_mountpoint_inode_operations
;
305 set_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
);
307 } else if (S_ISLNK(inode
->i_mode
))
308 inode
->i_op
= &nfs_symlink_inode_operations
;
310 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
312 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
313 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
314 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
315 nfsi
->change_attr
= 0;
321 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
323 nfsi
->read_cache_jiffies
= fattr
->time_start
;
324 nfsi
->attr_gencount
= fattr
->gencount
;
325 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
326 inode
->i_atime
= fattr
->atime
;
327 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
328 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
329 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
330 inode
->i_mtime
= fattr
->mtime
;
331 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
332 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
333 | NFS_INO_INVALID_DATA
;
334 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
335 inode
->i_ctime
= fattr
->ctime
;
336 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
337 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
338 | NFS_INO_INVALID_ACCESS
339 | NFS_INO_INVALID_ACL
;
340 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
341 nfsi
->change_attr
= fattr
->change_attr
;
342 else if (nfs_server_capable(inode
, NFS_CAP_CHANGE_ATTR
))
343 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
344 | NFS_INO_INVALID_DATA
;
345 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
346 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
348 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
349 | NFS_INO_INVALID_DATA
350 | NFS_INO_REVAL_PAGECACHE
;
351 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
352 inode
->i_nlink
= fattr
->nlink
;
353 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
354 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
355 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
356 inode
->i_uid
= fattr
->uid
;
357 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
358 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
359 | NFS_INO_INVALID_ACCESS
360 | NFS_INO_INVALID_ACL
;
361 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
362 inode
->i_gid
= fattr
->gid
;
363 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
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_BLOCKS_USED
)
368 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
369 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
371 * report the blocks in 512byte units
373 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
375 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
376 nfsi
->attrtimeo_timestamp
= now
;
377 nfsi
->access_cache
= RB_ROOT
;
379 nfs_fscache_init_inode_cookie(inode
);
381 unlock_new_inode(inode
);
383 nfs_refresh_inode(inode
, fattr
);
384 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
386 (long long)NFS_FILEID(inode
),
387 atomic_read(&inode
->i_count
));
393 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
397 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
400 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
402 struct inode
*inode
= dentry
->d_inode
;
403 struct nfs_fattr
*fattr
;
406 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
408 /* skip mode change if it's just for clearing setuid/setgid */
409 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
410 attr
->ia_valid
&= ~ATTR_MODE
;
412 if (attr
->ia_valid
& ATTR_SIZE
) {
413 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
414 attr
->ia_valid
&= ~ATTR_SIZE
;
417 /* Optimization: if the end result is no change, don't RPC */
418 attr
->ia_valid
&= NFS_VALID_ATTRS
;
419 if ((attr
->ia_valid
& ~ATTR_FILE
) == 0)
422 /* Write all dirty data */
423 if (S_ISREG(inode
->i_mode
))
426 fattr
= nfs_alloc_fattr();
430 * Return any delegations if we're going to change ACLs
432 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
433 nfs_inode_return_delegation(inode
);
434 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
436 nfs_refresh_inode(inode
, fattr
);
437 nfs_free_fattr(fattr
);
443 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
444 * @inode: inode of the file used
445 * @offset: file offset to start truncating
447 * This is a copy of the common vmtruncate, but with the locking
448 * corrected to take into account the fact that NFS requires
449 * inode->i_size to be updated under the inode->i_lock.
451 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
456 err
= inode_newsize_ok(inode
, offset
);
460 spin_lock(&inode
->i_lock
);
461 oldsize
= inode
->i_size
;
462 i_size_write(inode
, offset
);
463 spin_unlock(&inode
->i_lock
);
465 truncate_pagecache(inode
, oldsize
, offset
);
471 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
472 * @inode: pointer to struct inode
473 * @attr: pointer to struct iattr
475 * Note: we do this in the *proc.c in order to ensure that
476 * it works for things like exclusive creates too.
478 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
480 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
481 spin_lock(&inode
->i_lock
);
482 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
483 int mode
= attr
->ia_mode
& S_IALLUGO
;
484 mode
|= inode
->i_mode
& ~S_IALLUGO
;
485 inode
->i_mode
= mode
;
487 if ((attr
->ia_valid
& ATTR_UID
) != 0)
488 inode
->i_uid
= attr
->ia_uid
;
489 if ((attr
->ia_valid
& ATTR_GID
) != 0)
490 inode
->i_gid
= attr
->ia_gid
;
491 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
492 spin_unlock(&inode
->i_lock
);
494 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
495 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
496 nfs_vmtruncate(inode
, attr
->ia_size
);
500 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
502 struct inode
*inode
= dentry
->d_inode
;
503 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
506 /* Flush out writes to the server in order to update c/mtime. */
507 if (S_ISREG(inode
->i_mode
)) {
508 err
= filemap_write_and_wait(inode
->i_mapping
);
514 * We may force a getattr if the user cares about atime.
516 * Note that we only have to check the vfsmount flags here:
517 * - NFS always sets S_NOATIME by so checking it would give a
519 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
520 * no point in checking those.
522 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
523 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
527 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
529 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
531 generic_fillattr(inode
, stat
);
532 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
538 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
540 atomic_set(&l_ctx
->count
, 1);
541 l_ctx
->lockowner
= current
->files
;
542 l_ctx
->pid
= current
->tgid
;
543 INIT_LIST_HEAD(&l_ctx
->list
);
546 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
548 struct nfs_lock_context
*pos
;
550 list_for_each_entry(pos
, &ctx
->lock_context
.list
, list
) {
551 if (pos
->lockowner
!= current
->files
)
553 if (pos
->pid
!= current
->tgid
)
555 atomic_inc(&pos
->count
);
561 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
563 struct nfs_lock_context
*res
, *new = NULL
;
564 struct inode
*inode
= ctx
->path
.dentry
->d_inode
;
566 spin_lock(&inode
->i_lock
);
567 res
= __nfs_find_lock_context(ctx
);
569 spin_unlock(&inode
->i_lock
);
570 new = kmalloc(sizeof(*new), GFP_KERNEL
);
573 nfs_init_lock_context(new);
574 spin_lock(&inode
->i_lock
);
575 res
= __nfs_find_lock_context(ctx
);
577 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
578 new->open_context
= ctx
;
583 spin_unlock(&inode
->i_lock
);
588 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
590 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
591 struct inode
*inode
= ctx
->path
.dentry
->d_inode
;
593 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
595 list_del(&l_ctx
->list
);
596 spin_unlock(&inode
->i_lock
);
601 * nfs_close_context - Common close_context() routine NFSv2/v3
602 * @ctx: pointer to context
603 * @is_sync: is this a synchronous close
605 * always ensure that the attributes are up to date if we're mounted
606 * with close-to-open semantics
608 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
611 struct nfs_server
*server
;
613 if (!(ctx
->mode
& FMODE_WRITE
))
617 inode
= ctx
->path
.dentry
->d_inode
;
618 if (!list_empty(&NFS_I(inode
)->open_files
))
620 server
= NFS_SERVER(inode
);
621 if (server
->flags
& NFS_MOUNT_NOCTO
)
623 nfs_revalidate_inode(server
, inode
);
626 static struct nfs_open_context
*alloc_nfs_open_context(struct path
*path
, struct rpc_cred
*cred
)
628 struct nfs_open_context
*ctx
;
630 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
633 path_get(&ctx
->path
);
634 ctx
->cred
= get_rpccred(cred
);
639 nfs_init_lock_context(&ctx
->lock_context
);
640 ctx
->lock_context
.open_context
= ctx
;
645 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
648 atomic_inc(&ctx
->lock_context
.count
);
652 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
654 struct inode
*inode
= ctx
->path
.dentry
->d_inode
;
656 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
658 list_del(&ctx
->list
);
659 spin_unlock(&inode
->i_lock
);
660 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
661 if (ctx
->cred
!= NULL
)
662 put_rpccred(ctx
->cred
);
663 path_put(&ctx
->path
);
667 void put_nfs_open_context(struct nfs_open_context
*ctx
)
669 __put_nfs_open_context(ctx
, 0);
673 * Ensure that mmap has a recent RPC credential for use when writing out
676 static void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
678 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
679 struct nfs_inode
*nfsi
= NFS_I(inode
);
681 filp
->private_data
= get_nfs_open_context(ctx
);
682 spin_lock(&inode
->i_lock
);
683 list_add(&ctx
->list
, &nfsi
->open_files
);
684 spin_unlock(&inode
->i_lock
);
688 * Given an inode, search for an open context with the desired characteristics
690 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
692 struct nfs_inode
*nfsi
= NFS_I(inode
);
693 struct nfs_open_context
*pos
, *ctx
= NULL
;
695 spin_lock(&inode
->i_lock
);
696 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
697 if (cred
!= NULL
&& pos
->cred
!= cred
)
699 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
701 ctx
= get_nfs_open_context(pos
);
704 spin_unlock(&inode
->i_lock
);
708 static void nfs_file_clear_open_context(struct file
*filp
)
710 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
711 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
714 filp
->private_data
= NULL
;
715 spin_lock(&inode
->i_lock
);
716 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
717 spin_unlock(&inode
->i_lock
);
718 __put_nfs_open_context(ctx
, filp
->f_flags
& O_DIRECT
? 0 : 1);
723 * These allocate and release file read/write context information.
725 int nfs_open(struct inode
*inode
, struct file
*filp
)
727 struct nfs_open_context
*ctx
;
728 struct rpc_cred
*cred
;
730 cred
= rpc_lookup_cred();
732 return PTR_ERR(cred
);
733 ctx
= alloc_nfs_open_context(&filp
->f_path
, cred
);
737 ctx
->mode
= filp
->f_mode
;
738 nfs_file_set_open_context(filp
, ctx
);
739 put_nfs_open_context(ctx
);
740 nfs_fscache_set_inode_cookie(inode
, filp
);
744 int nfs_release(struct inode
*inode
, struct file
*filp
)
746 nfs_file_clear_open_context(filp
);
751 * This function is called whenever some part of NFS notices that
752 * the cached attributes have to be refreshed.
755 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
757 int status
= -ESTALE
;
758 struct nfs_fattr
*fattr
= NULL
;
759 struct nfs_inode
*nfsi
= NFS_I(inode
);
761 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
762 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
764 if (is_bad_inode(inode
))
766 if (NFS_STALE(inode
))
770 fattr
= nfs_alloc_fattr();
774 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
775 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
);
777 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
779 (long long)NFS_FILEID(inode
), status
);
780 if (status
== -ESTALE
) {
781 nfs_zap_caches(inode
);
782 if (!S_ISDIR(inode
->i_mode
))
783 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
788 status
= nfs_refresh_inode(inode
, fattr
);
790 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
792 (long long)NFS_FILEID(inode
), status
);
796 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
797 nfs_zap_acl_cache(inode
);
799 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
801 (long long)NFS_FILEID(inode
));
804 nfs_free_fattr(fattr
);
808 int nfs_attribute_timeout(struct inode
*inode
)
810 struct nfs_inode
*nfsi
= NFS_I(inode
);
812 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
815 static int nfs_attribute_cache_expired(struct inode
*inode
)
817 if (nfs_have_delegated_attributes(inode
))
819 return nfs_attribute_timeout(inode
);
823 * nfs_revalidate_inode - Revalidate the inode attributes
824 * @server - pointer to nfs_server struct
825 * @inode - pointer to inode struct
827 * Updates inode attribute information by retrieving the data from the server.
829 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
831 if (!(NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATTR
)
832 && !nfs_attribute_cache_expired(inode
))
833 return NFS_STALE(inode
) ? -ESTALE
: 0;
834 return __nfs_revalidate_inode(server
, inode
);
837 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
839 struct nfs_inode
*nfsi
= NFS_I(inode
);
841 if (mapping
->nrpages
!= 0) {
842 int ret
= invalidate_inode_pages2(mapping
);
846 spin_lock(&inode
->i_lock
);
847 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
848 if (S_ISDIR(inode
->i_mode
))
849 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
850 spin_unlock(&inode
->i_lock
);
851 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
852 nfs_fscache_reset_inode_cookie(inode
);
853 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
854 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
859 * nfs_revalidate_mapping - Revalidate the pagecache
860 * @inode - pointer to host inode
861 * @mapping - pointer to mapping
863 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
865 struct nfs_inode
*nfsi
= NFS_I(inode
);
868 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
869 || nfs_attribute_cache_expired(inode
)
870 || NFS_STALE(inode
)) {
871 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
875 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
876 ret
= nfs_invalidate_mapping(inode
, mapping
);
881 static void nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
883 struct nfs_inode
*nfsi
= NFS_I(inode
);
885 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
886 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
887 && nfsi
->change_attr
== fattr
->pre_change_attr
) {
888 nfsi
->change_attr
= fattr
->change_attr
;
889 if (S_ISDIR(inode
->i_mode
))
890 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
892 /* If we have atomic WCC data, we may update some attributes */
893 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
894 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
895 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
))
896 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
898 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
899 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
900 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
901 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
902 if (S_ISDIR(inode
->i_mode
))
903 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
905 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
906 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
907 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
908 && nfsi
->npages
== 0)
909 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
913 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
914 * @inode - pointer to inode
915 * @fattr - updated attributes
917 * Verifies the attribute cache. If we have just changed the attributes,
918 * so that fattr carries weak cache consistency data, then it may
919 * also update the ctime/mtime/change_attribute.
921 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
923 struct nfs_inode
*nfsi
= NFS_I(inode
);
924 loff_t cur_size
, new_isize
;
925 unsigned long invalid
= 0;
928 /* Has the inode gone and changed behind our back? */
929 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
931 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
934 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
935 nfsi
->change_attr
!= fattr
->change_attr
)
936 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
938 /* Verify a few of the more important attributes */
939 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
940 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
942 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
943 cur_size
= i_size_read(inode
);
944 new_isize
= nfs_size_to_loff_t(fattr
->size
);
945 if (cur_size
!= new_isize
&& nfsi
->npages
== 0)
946 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
949 /* Have any file permissions changed? */
950 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
951 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
952 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && inode
->i_uid
!= fattr
->uid
)
953 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
954 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && inode
->i_gid
!= fattr
->gid
)
955 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
957 /* Has the link count changed? */
958 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
959 invalid
|= NFS_INO_INVALID_ATTR
;
961 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
962 invalid
|= NFS_INO_INVALID_ATIME
;
965 nfsi
->cache_validity
|= invalid
;
967 nfsi
->read_cache_jiffies
= fattr
->time_start
;
971 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
973 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
975 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
978 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
980 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
982 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
985 static atomic_long_t nfs_attr_generation_counter
;
987 static unsigned long nfs_read_attr_generation_counter(void)
989 return atomic_long_read(&nfs_attr_generation_counter
);
992 unsigned long nfs_inc_attr_generation_counter(void)
994 return atomic_long_inc_return(&nfs_attr_generation_counter
);
997 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1000 fattr
->time_start
= jiffies
;
1001 fattr
->gencount
= nfs_inc_attr_generation_counter();
1004 struct nfs_fattr
*nfs_alloc_fattr(void)
1006 struct nfs_fattr
*fattr
;
1008 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1010 nfs_fattr_init(fattr
);
1014 struct nfs_fh
*nfs_alloc_fhandle(void)
1018 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1025 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1026 * @inode - pointer to inode
1027 * @fattr - attributes
1029 * Attempt to divine whether or not an RPC call reply carrying stale
1030 * attributes got scheduled after another call carrying updated ones.
1032 * To do so, the function first assumes that a more recent ctime means
1033 * that the attributes in fattr are newer, however it also attempt to
1034 * catch the case where ctime either didn't change, or went backwards
1035 * (if someone reset the clock on the server) by looking at whether
1036 * or not this RPC call was started after the inode was last updated.
1037 * Note also the check for wraparound of 'attr_gencount'
1039 * The function returns 'true' if it thinks the attributes in 'fattr' are
1040 * more recent than the ones cached in the inode.
1043 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1045 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1047 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1048 nfs_ctime_need_update(inode
, fattr
) ||
1049 nfs_size_need_update(inode
, fattr
) ||
1050 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1053 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1055 if (nfs_inode_attrs_need_update(inode
, fattr
))
1056 return nfs_update_inode(inode
, fattr
);
1057 return nfs_check_inode_attributes(inode
, fattr
);
1061 * nfs_refresh_inode - try to update the inode attribute cache
1062 * @inode - pointer to inode
1063 * @fattr - updated attributes
1065 * Check that an RPC call that returned attributes has not overlapped with
1066 * other recent updates of the inode metadata, then decide whether it is
1067 * safe to do a full update of the inode attributes, or whether just to
1068 * call nfs_check_inode_attributes.
1070 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1074 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1076 spin_lock(&inode
->i_lock
);
1077 status
= nfs_refresh_inode_locked(inode
, fattr
);
1078 spin_unlock(&inode
->i_lock
);
1083 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1085 struct nfs_inode
*nfsi
= NFS_I(inode
);
1087 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1088 if (S_ISDIR(inode
->i_mode
))
1089 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1090 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1092 return nfs_refresh_inode_locked(inode
, fattr
);
1096 * nfs_post_op_update_inode - try to update the inode attribute cache
1097 * @inode - pointer to inode
1098 * @fattr - updated attributes
1100 * After an operation that has changed the inode metadata, mark the
1101 * attribute cache as being invalid, then try to update it.
1103 * NB: if the server didn't return any post op attributes, this
1104 * function will force the retrieval of attributes before the next
1105 * NFS request. Thus it should be used only for operations that
1106 * are expected to change one or more attributes, to avoid
1107 * unnecessary NFS requests and trips through nfs_update_inode().
1109 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1113 spin_lock(&inode
->i_lock
);
1114 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1115 spin_unlock(&inode
->i_lock
);
1120 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1121 * @inode - pointer to inode
1122 * @fattr - updated attributes
1124 * After an operation that has changed the inode metadata, mark the
1125 * attribute cache as being invalid, then try to update it. Fake up
1126 * weak cache consistency data, if none exist.
1128 * This function is mainly designed to be used by the ->write_done() functions.
1130 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1134 spin_lock(&inode
->i_lock
);
1135 /* Don't do a WCC update if these attributes are already stale */
1136 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1137 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1138 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1139 | NFS_ATTR_FATTR_PRESIZE
1140 | NFS_ATTR_FATTR_PREMTIME
1141 | NFS_ATTR_FATTR_PRECTIME
);
1144 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1145 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1146 fattr
->pre_change_attr
= NFS_I(inode
)->change_attr
;
1147 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1149 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1150 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1151 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1152 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1154 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1155 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1156 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1157 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1159 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1160 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1161 fattr
->pre_size
= i_size_read(inode
);
1162 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1165 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1166 spin_unlock(&inode
->i_lock
);
1171 * Many nfs protocol calls return the new file attributes after
1172 * an operation. Here we update the inode to reflect the state
1173 * of the server's inode.
1175 * This is a bit tricky because we have to make sure all dirty pages
1176 * have been sent off to the server before calling invalidate_inode_pages.
1177 * To make sure no other process adds more write requests while we try
1178 * our best to flush them, we make them sleep during the attribute refresh.
1180 * A very similar scenario holds for the dir cache.
1182 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1184 struct nfs_server
*server
;
1185 struct nfs_inode
*nfsi
= NFS_I(inode
);
1186 loff_t cur_isize
, new_isize
;
1187 unsigned long invalid
= 0;
1188 unsigned long now
= jiffies
;
1189 unsigned long save_cache_validity
;
1191 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1192 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1193 atomic_read(&inode
->i_count
), fattr
->valid
);
1195 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1199 * Make sure the inode's type hasn't changed.
1201 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1204 server
= NFS_SERVER(inode
);
1205 /* Update the fsid? */
1206 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1207 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1208 !test_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
))
1209 server
->fsid
= fattr
->fsid
;
1212 * Update the read time so we don't revalidate too often.
1214 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1216 save_cache_validity
= nfsi
->cache_validity
;
1217 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1218 | NFS_INO_INVALID_ATIME
1219 | NFS_INO_REVAL_FORCED
1220 | NFS_INO_REVAL_PAGECACHE
);
1222 /* Do atomic weak cache consistency updates */
1223 nfs_wcc_update_inode(inode
, fattr
);
1225 /* More cache consistency checks */
1226 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1227 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1228 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1229 inode
->i_sb
->s_id
, inode
->i_ino
);
1230 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1231 if (S_ISDIR(inode
->i_mode
))
1232 nfs_force_lookup_revalidate(inode
);
1233 nfsi
->change_attr
= fattr
->change_attr
;
1235 } else if (server
->caps
& NFS_CAP_CHANGE_ATTR
)
1236 invalid
|= save_cache_validity
;
1238 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1239 /* NFSv2/v3: Check if the mtime agrees */
1240 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1241 dprintk("NFS: mtime change on server for file %s/%ld\n",
1242 inode
->i_sb
->s_id
, inode
->i_ino
);
1243 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1244 if (S_ISDIR(inode
->i_mode
))
1245 nfs_force_lookup_revalidate(inode
);
1246 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1248 } else if (server
->caps
& NFS_CAP_MTIME
)
1249 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1250 | NFS_INO_INVALID_DATA
1251 | NFS_INO_REVAL_PAGECACHE
1252 | NFS_INO_REVAL_FORCED
);
1254 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1255 /* If ctime has changed we should definitely clear access+acl caches */
1256 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1257 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1258 /* and probably clear data for a directory too as utimes can cause
1259 * havoc with our cache.
1261 if (S_ISDIR(inode
->i_mode
)) {
1262 invalid
|= NFS_INO_INVALID_DATA
;
1263 nfs_force_lookup_revalidate(inode
);
1265 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1267 } else if (server
->caps
& NFS_CAP_CTIME
)
1268 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1269 | NFS_INO_INVALID_ACCESS
1270 | NFS_INO_INVALID_ACL
1271 | NFS_INO_REVAL_FORCED
);
1273 /* Check if our cached file size is stale */
1274 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1275 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1276 cur_isize
= i_size_read(inode
);
1277 if (new_isize
!= cur_isize
) {
1278 /* Do we perhaps have any outstanding writes, or has
1279 * the file grown beyond our last write? */
1280 if (nfsi
->npages
== 0 || new_isize
> cur_isize
) {
1281 i_size_write(inode
, new_isize
);
1282 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1284 dprintk("NFS: isize change on server for file %s/%ld\n",
1285 inode
->i_sb
->s_id
, inode
->i_ino
);
1288 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1289 | NFS_INO_REVAL_PAGECACHE
1290 | NFS_INO_REVAL_FORCED
);
1293 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1294 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1295 else if (server
->caps
& NFS_CAP_ATIME
)
1296 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATIME
1297 | NFS_INO_REVAL_FORCED
);
1299 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1300 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1301 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1302 newmode
|= fattr
->mode
& S_IALLUGO
;
1303 inode
->i_mode
= newmode
;
1304 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1306 } else if (server
->caps
& NFS_CAP_MODE
)
1307 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1308 | NFS_INO_INVALID_ACCESS
1309 | NFS_INO_INVALID_ACL
1310 | NFS_INO_REVAL_FORCED
);
1312 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1313 if (inode
->i_uid
!= fattr
->uid
) {
1314 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1315 inode
->i_uid
= fattr
->uid
;
1317 } else if (server
->caps
& NFS_CAP_OWNER
)
1318 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1319 | NFS_INO_INVALID_ACCESS
1320 | NFS_INO_INVALID_ACL
1321 | NFS_INO_REVAL_FORCED
);
1323 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1324 if (inode
->i_gid
!= fattr
->gid
) {
1325 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1326 inode
->i_gid
= fattr
->gid
;
1328 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
)
1329 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1330 | NFS_INO_INVALID_ACCESS
1331 | NFS_INO_INVALID_ACL
1332 | NFS_INO_REVAL_FORCED
);
1334 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1335 if (inode
->i_nlink
!= fattr
->nlink
) {
1336 invalid
|= NFS_INO_INVALID_ATTR
;
1337 if (S_ISDIR(inode
->i_mode
))
1338 invalid
|= NFS_INO_INVALID_DATA
;
1339 inode
->i_nlink
= fattr
->nlink
;
1341 } else if (server
->caps
& NFS_CAP_NLINK
)
1342 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1343 | NFS_INO_REVAL_FORCED
);
1345 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1347 * report the blocks in 512byte units
1349 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1351 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1352 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1354 /* Update attrtimeo value if we're out of the unstable period */
1355 if (invalid
& NFS_INO_INVALID_ATTR
) {
1356 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1357 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1358 nfsi
->attrtimeo_timestamp
= now
;
1359 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1361 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1362 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1363 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1364 nfsi
->attrtimeo_timestamp
= now
;
1367 invalid
&= ~NFS_INO_INVALID_ATTR
;
1368 /* Don't invalidate the data if we were to blame */
1369 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1370 || S_ISLNK(inode
->i_mode
)))
1371 invalid
&= ~NFS_INO_INVALID_DATA
;
1372 if (!nfs_have_delegation(inode
, FMODE_READ
) ||
1373 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1374 nfsi
->cache_validity
|= invalid
;
1379 * Big trouble! The inode has become a different object.
1381 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1382 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1385 * No need to worry about unhashing the dentry, as the
1386 * lookup validation will know that the inode is bad.
1387 * (But we fall through to invalidate the caches.)
1389 nfs_invalidate_inode(inode
);
1393 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1394 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1395 NFS_SERVER(inode
)->nfs_client
->cl_hostname
, inode
->i_sb
->s_id
,
1396 (long long)nfsi
->fileid
, (long long)fattr
->fileid
);
1401 #ifdef CONFIG_NFS_V4
1404 * Clean out any remaining NFSv4 state that might be left over due
1405 * to open() calls that passed nfs_atomic_lookup, but failed to call
1408 void nfs4_evict_inode(struct inode
*inode
)
1410 truncate_inode_pages(&inode
->i_data
, 0);
1411 end_writeback(inode
);
1412 /* If we are holding a delegation, return it! */
1413 nfs_inode_return_delegation_noreclaim(inode
);
1414 /* First call standard NFS clear_inode() code */
1415 nfs_clear_inode(inode
);
1419 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1421 struct nfs_inode
*nfsi
;
1422 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1426 nfsi
->cache_validity
= 0UL;
1427 #ifdef CONFIG_NFS_V3_ACL
1428 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
1429 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
1431 #ifdef CONFIG_NFS_V4
1432 nfsi
->nfs4_acl
= NULL
;
1433 #endif /* CONFIG_NFS_V4 */
1434 return &nfsi
->vfs_inode
;
1437 void nfs_destroy_inode(struct inode
*inode
)
1439 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1442 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1444 #ifdef CONFIG_NFS_V4
1445 INIT_LIST_HEAD(&nfsi
->open_states
);
1446 nfsi
->delegation
= NULL
;
1447 nfsi
->delegation_state
= 0;
1448 init_rwsem(&nfsi
->rwsem
);
1452 static void init_once(void *foo
)
1454 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1456 inode_init_once(&nfsi
->vfs_inode
);
1457 INIT_LIST_HEAD(&nfsi
->open_files
);
1458 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1459 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1460 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
1463 atomic_set(&nfsi
->silly_count
, 1);
1464 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1465 init_waitqueue_head(&nfsi
->waitqueue
);
1466 nfs4_init_once(nfsi
);
1469 static int __init
nfs_init_inodecache(void)
1471 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1472 sizeof(struct nfs_inode
),
1473 0, (SLAB_RECLAIM_ACCOUNT
|
1476 if (nfs_inode_cachep
== NULL
)
1482 static void nfs_destroy_inodecache(void)
1484 kmem_cache_destroy(nfs_inode_cachep
);
1487 struct workqueue_struct
*nfsiod_workqueue
;
1490 * start up the nfsiod workqueue
1492 static int nfsiod_start(void)
1494 struct workqueue_struct
*wq
;
1495 dprintk("RPC: creating workqueue nfsiod\n");
1496 wq
= create_singlethread_workqueue("nfsiod");
1499 nfsiod_workqueue
= wq
;
1504 * Destroy the nfsiod workqueue
1506 static void nfsiod_stop(void)
1508 struct workqueue_struct
*wq
;
1510 wq
= nfsiod_workqueue
;
1513 nfsiod_workqueue
= NULL
;
1514 destroy_workqueue(wq
);
1520 static int __init
init_nfs_fs(void)
1524 err
= nfs_dns_resolver_init();
1528 err
= nfs_fscache_register();
1532 err
= nfsiod_start();
1536 err
= nfs_fs_proc_init();
1540 err
= nfs_init_nfspagecache();
1544 err
= nfs_init_inodecache();
1548 err
= nfs_init_readpagecache();
1552 err
= nfs_init_writepagecache();
1556 err
= nfs_init_directcache();
1560 #ifdef CONFIG_PROC_FS
1561 rpc_proc_register(&nfs_rpcstat
);
1563 if ((err
= register_nfs_fs()) != 0)
1567 #ifdef CONFIG_PROC_FS
1568 rpc_proc_unregister("nfs");
1570 nfs_destroy_directcache();
1572 nfs_destroy_writepagecache();
1574 nfs_destroy_readpagecache();
1576 nfs_destroy_inodecache();
1578 nfs_destroy_nfspagecache();
1584 nfs_fscache_unregister();
1586 nfs_dns_resolver_destroy();
1591 static void __exit
exit_nfs_fs(void)
1593 nfs_destroy_directcache();
1594 nfs_destroy_writepagecache();
1595 nfs_destroy_readpagecache();
1596 nfs_destroy_inodecache();
1597 nfs_destroy_nfspagecache();
1598 nfs_fscache_unregister();
1599 nfs_dns_resolver_destroy();
1600 #ifdef CONFIG_PROC_FS
1601 rpc_proc_unregister("nfs");
1603 unregister_nfs_fs();
1608 /* Not quite true; I just maintain it */
1609 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1610 MODULE_LICENSE("GPL");
1611 module_param(enable_ino64
, bool, 0644);
1613 module_init(init_nfs_fs
)
1614 module_exit(exit_nfs_fs
)