4 * Copyright (C) 1992 Rick Sladkey
6 * nfs inode and superblock handling functions
8 * Modularised by Alan Cox <Alan.Cox@linux.org>, 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/config.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
20 #include <linux/time.h>
21 #include <linux/kernel.h>
23 #include <linux/string.h>
24 #include <linux/stat.h>
25 #include <linux/errno.h>
26 #include <linux/unistd.h>
27 #include <linux/sunrpc/clnt.h>
28 #include <linux/sunrpc/stats.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/smp_lock.h>
34 #include <linux/seq_file.h>
35 #include <linux/mount.h>
36 #include <linux/nfs_idmap.h>
37 #include <linux/vfs.h>
39 #include <asm/system.h>
40 #include <asm/uaccess.h>
43 #include "delegation.h"
45 #define NFSDBG_FACILITY NFSDBG_VFS
46 #define NFS_PARANOIA 1
48 /* Maximum number of readahead requests
49 * FIXME: this should really be a sysctl so that users may tune it to suit
50 * their needs. People that do NFS over a slow network, might for
51 * instance want to reduce it to something closer to 1 for improved
52 * interactive response.
54 #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
56 static void nfs_invalidate_inode(struct inode
*);
57 static int nfs_update_inode(struct inode
*, struct nfs_fattr
*);
59 static struct inode
*nfs_alloc_inode(struct super_block
*sb
);
60 static void nfs_destroy_inode(struct inode
*);
61 static int nfs_write_inode(struct inode
*,int);
62 static void nfs_delete_inode(struct inode
*);
63 static void nfs_clear_inode(struct inode
*);
64 static void nfs_umount_begin(struct super_block
*);
65 static int nfs_statfs(struct super_block
*, struct kstatfs
*);
66 static int nfs_show_options(struct seq_file
*, struct vfsmount
*);
67 static void nfs_zap_acl_cache(struct inode
*);
69 static struct rpc_program nfs_program
;
71 static struct super_operations nfs_sops
= {
72 .alloc_inode
= nfs_alloc_inode
,
73 .destroy_inode
= nfs_destroy_inode
,
74 .write_inode
= nfs_write_inode
,
75 .delete_inode
= nfs_delete_inode
,
77 .clear_inode
= nfs_clear_inode
,
78 .umount_begin
= nfs_umount_begin
,
79 .show_options
= nfs_show_options
,
85 static struct rpc_stat nfs_rpcstat
= {
86 .program
= &nfs_program
88 static struct rpc_version
* nfs_version
[] = {
92 #if defined(CONFIG_NFS_V3)
94 #elif defined(CONFIG_NFS_V4)
97 #if defined(CONFIG_NFS_V4)
102 static struct rpc_program nfs_program
= {
104 .number
= NFS_PROGRAM
,
105 .nrvers
= sizeof(nfs_version
) / sizeof(nfs_version
[0]),
106 .version
= nfs_version
,
107 .stats
= &nfs_rpcstat
,
108 .pipe_dir_name
= "/nfs",
111 #ifdef CONFIG_NFS_V3_ACL
112 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
113 static struct rpc_version
* nfsacl_version
[] = {
114 [3] = &nfsacl_version3
,
117 struct rpc_program nfsacl_program
= {
119 .number
= NFS_ACL_PROGRAM
,
120 .nrvers
= sizeof(nfsacl_version
) / sizeof(nfsacl_version
[0]),
121 .version
= nfsacl_version
,
122 .stats
= &nfsacl_rpcstat
,
124 #endif /* CONFIG_NFS_V3_ACL */
126 static inline unsigned long
127 nfs_fattr_to_ino_t(struct nfs_fattr
*fattr
)
129 return nfs_fileid_to_ino_t(fattr
->fileid
);
133 nfs_write_inode(struct inode
*inode
, int sync
)
135 int flags
= sync
? FLUSH_WAIT
: 0;
138 ret
= nfs_commit_inode(inode
, flags
);
145 nfs_delete_inode(struct inode
* inode
)
147 dprintk("NFS: delete_inode(%s/%ld)\n", inode
->i_sb
->s_id
, inode
->i_ino
);
149 truncate_inode_pages(&inode
->i_data
, 0);
153 * The following should never happen...
155 if (nfs_have_writebacks(inode
)) {
156 printk(KERN_ERR
"nfs_delete_inode: inode %ld has pending RPC requests\n", inode
->i_ino
);
163 nfs_clear_inode(struct inode
*inode
)
165 struct nfs_inode
*nfsi
= NFS_I(inode
);
166 struct rpc_cred
*cred
;
169 BUG_ON (!list_empty(&nfsi
->open_files
));
170 nfs_zap_acl_cache(inode
);
171 cred
= nfsi
->cache_access
.cred
;
174 BUG_ON(atomic_read(&nfsi
->data_updates
) != 0);
178 nfs_umount_begin(struct super_block
*sb
)
180 struct rpc_clnt
*rpc
= NFS_SB(sb
)->client
;
182 /* -EIO all pending I/O */
184 rpc_killall_tasks(rpc
);
185 rpc
= NFS_SB(sb
)->client_acl
;
187 rpc_killall_tasks(rpc
);
191 static inline unsigned long
192 nfs_block_bits(unsigned long bsize
, unsigned char *nrbitsp
)
194 /* make sure blocksize is a power of two */
195 if ((bsize
& (bsize
- 1)) || nrbitsp
) {
196 unsigned char nrbits
;
198 for (nrbits
= 31; nrbits
&& !(bsize
& (1 << nrbits
)); nrbits
--)
209 * Calculate the number of 512byte blocks used.
211 static inline unsigned long
212 nfs_calc_block_size(u64 tsize
)
214 loff_t used
= (tsize
+ 511) >> 9;
215 return (used
> ULONG_MAX
) ? ULONG_MAX
: used
;
219 * Compute and set NFS server blocksize
221 static inline unsigned long
222 nfs_block_size(unsigned long bsize
, unsigned char *nrbitsp
)
224 if (bsize
< NFS_MIN_FILE_IO_SIZE
)
225 bsize
= NFS_DEF_FILE_IO_SIZE
;
226 else if (bsize
>= NFS_MAX_FILE_IO_SIZE
)
227 bsize
= NFS_MAX_FILE_IO_SIZE
;
229 return nfs_block_bits(bsize
, nrbitsp
);
233 * Obtain the root inode of the file system.
235 static struct inode
*
236 nfs_get_root(struct super_block
*sb
, struct nfs_fh
*rootfh
, struct nfs_fsinfo
*fsinfo
)
238 struct nfs_server
*server
= NFS_SB(sb
);
242 error
= server
->rpc_ops
->getroot(server
, rootfh
, fsinfo
);
244 dprintk("nfs_get_root: getattr error = %d\n", -error
);
245 return ERR_PTR(error
);
248 rooti
= nfs_fhget(sb
, rootfh
, fsinfo
->fattr
);
250 return ERR_PTR(-ENOMEM
);
255 * Do NFS version-independent mount processing, and sanity checking
258 nfs_sb_init(struct super_block
*sb
, rpc_authflavor_t authflavor
)
260 struct nfs_server
*server
;
261 struct inode
*root_inode
;
262 struct nfs_fattr fattr
;
263 struct nfs_fsinfo fsinfo
= {
266 struct nfs_pathconf pathinfo
= {
269 int no_root_error
= 0;
270 unsigned long max_rpc_payload
;
272 /* We probably want something more informative here */
273 snprintf(sb
->s_id
, sizeof(sb
->s_id
), "%x:%x", MAJOR(sb
->s_dev
), MINOR(sb
->s_dev
));
277 sb
->s_magic
= NFS_SUPER_MAGIC
;
279 root_inode
= nfs_get_root(sb
, &server
->fh
, &fsinfo
);
280 /* Did getting the root inode fail? */
281 if (IS_ERR(root_inode
)) {
282 no_root_error
= PTR_ERR(root_inode
);
285 sb
->s_root
= d_alloc_root(root_inode
);
287 no_root_error
= -ENOMEM
;
290 sb
->s_root
->d_op
= server
->rpc_ops
->dentry_ops
;
292 /* Get some general file system info */
293 if (server
->namelen
== 0 &&
294 server
->rpc_ops
->pathconf(server
, &server
->fh
, &pathinfo
) >= 0)
295 server
->namelen
= pathinfo
.max_namelen
;
296 /* Work out a lot of parameters */
297 if (server
->rsize
== 0)
298 server
->rsize
= nfs_block_size(fsinfo
.rtpref
, NULL
);
299 if (server
->wsize
== 0)
300 server
->wsize
= nfs_block_size(fsinfo
.wtpref
, NULL
);
302 if (fsinfo
.rtmax
>= 512 && server
->rsize
> fsinfo
.rtmax
)
303 server
->rsize
= nfs_block_size(fsinfo
.rtmax
, NULL
);
304 if (fsinfo
.wtmax
>= 512 && server
->wsize
> fsinfo
.wtmax
)
305 server
->wsize
= nfs_block_size(fsinfo
.wtmax
, NULL
);
307 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
308 if (server
->rsize
> max_rpc_payload
)
309 server
->rsize
= max_rpc_payload
;
310 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
311 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
312 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
314 if (server
->wsize
> max_rpc_payload
)
315 server
->wsize
= max_rpc_payload
;
316 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
317 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
318 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
320 if (sb
->s_blocksize
== 0)
321 sb
->s_blocksize
= nfs_block_bits(server
->wsize
,
322 &sb
->s_blocksize_bits
);
323 server
->wtmult
= nfs_block_bits(fsinfo
.wtmult
, NULL
);
325 server
->dtsize
= nfs_block_size(fsinfo
.dtpref
, NULL
);
326 if (server
->dtsize
> PAGE_CACHE_SIZE
)
327 server
->dtsize
= PAGE_CACHE_SIZE
;
328 if (server
->dtsize
> server
->rsize
)
329 server
->dtsize
= server
->rsize
;
331 if (server
->flags
& NFS_MOUNT_NOAC
) {
332 server
->acregmin
= server
->acregmax
= 0;
333 server
->acdirmin
= server
->acdirmax
= 0;
334 sb
->s_flags
|= MS_SYNCHRONOUS
;
336 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
338 sb
->s_maxbytes
= fsinfo
.maxfilesize
;
339 if (sb
->s_maxbytes
> MAX_LFS_FILESIZE
)
340 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
342 server
->client
->cl_intr
= (server
->flags
& NFS_MOUNT_INTR
) ? 1 : 0;
343 server
->client
->cl_softrtry
= (server
->flags
& NFS_MOUNT_SOFT
) ? 1 : 0;
345 /* We're airborne Set socket buffersize */
346 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
348 /* Yargs. It didn't work out. */
350 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error
);
351 if (!IS_ERR(root_inode
))
353 return no_root_error
;
356 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
, unsigned int timeo
, unsigned int retrans
)
358 to
->to_initval
= timeo
* HZ
/ 10;
359 to
->to_retries
= retrans
;
366 to
->to_initval
= 60 * HZ
;
367 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
368 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
369 to
->to_increment
= to
->to_initval
;
370 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
371 to
->to_exponential
= 0;
376 to
->to_initval
= 11 * HZ
/ 10;
377 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
378 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
379 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
380 to
->to_exponential
= 1;
386 * Create an RPC client handle.
388 static struct rpc_clnt
*
389 nfs_create_client(struct nfs_server
*server
, const struct nfs_mount_data
*data
)
391 struct rpc_timeout timeparms
;
392 struct rpc_xprt
*xprt
= NULL
;
393 struct rpc_clnt
*clnt
= NULL
;
394 int proto
= (data
->flags
& NFS_MOUNT_TCP
) ? IPPROTO_TCP
: IPPROTO_UDP
;
396 nfs_init_timeout_values(&timeparms
, proto
, data
->timeo
, data
->retrans
);
398 /* create transport and client */
399 xprt
= xprt_create_proto(proto
, &server
->addr
, &timeparms
);
401 dprintk("%s: cannot create RPC transport. Error = %ld\n",
402 __FUNCTION__
, PTR_ERR(xprt
));
403 return (struct rpc_clnt
*)xprt
;
405 clnt
= rpc_create_client(xprt
, server
->hostname
, &nfs_program
,
406 server
->rpc_ops
->version
, data
->pseudoflavor
);
408 dprintk("%s: cannot create RPC client. Error = %ld\n",
409 __FUNCTION__
, PTR_ERR(xprt
));
414 clnt
->cl_softrtry
= 1;
424 * The way this works is that the mount process passes a structure
425 * in the data argument which contains the server's IP address
426 * and the root file handle obtained from the server's mount
427 * daemon. We stash these away in the private superblock fields.
430 nfs_fill_super(struct super_block
*sb
, struct nfs_mount_data
*data
, int silent
)
432 struct nfs_server
*server
;
433 rpc_authflavor_t authflavor
;
436 sb
->s_blocksize_bits
= 0;
439 sb
->s_blocksize
= nfs_block_size(data
->bsize
, &sb
->s_blocksize_bits
);
441 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
443 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
444 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
446 server
->acregmin
= data
->acregmin
*HZ
;
447 server
->acregmax
= data
->acregmax
*HZ
;
448 server
->acdirmin
= data
->acdirmin
*HZ
;
449 server
->acdirmax
= data
->acdirmax
*HZ
;
451 /* Start lockd here, before we might error out */
452 if (!(server
->flags
& NFS_MOUNT_NONLM
))
455 server
->namelen
= data
->namlen
;
456 server
->hostname
= kmalloc(strlen(data
->hostname
) + 1, GFP_KERNEL
);
457 if (!server
->hostname
)
459 strcpy(server
->hostname
, data
->hostname
);
461 /* Check NFS protocol revision and initialize RPC op vector
462 * and file handle pool. */
464 if (server
->flags
& NFS_MOUNT_VER3
) {
465 server
->rpc_ops
= &nfs_v3_clientops
;
466 server
->caps
|= NFS_CAP_READDIRPLUS
;
468 server
->rpc_ops
= &nfs_v2_clientops
;
471 server
->rpc_ops
= &nfs_v2_clientops
;
474 /* Fill in pseudoflavor for mount version < 5 */
475 if (!(data
->flags
& NFS_MOUNT_SECFLAVOUR
))
476 data
->pseudoflavor
= RPC_AUTH_UNIX
;
477 authflavor
= data
->pseudoflavor
; /* save for sb_init() */
478 /* XXX maybe we want to add a server->pseudoflavor field */
480 /* Create RPC client handles */
481 server
->client
= nfs_create_client(server
, data
);
482 if (IS_ERR(server
->client
))
483 return PTR_ERR(server
->client
);
484 /* RFC 2623, sec 2.3.2 */
485 if (authflavor
!= RPC_AUTH_UNIX
) {
486 struct rpc_auth
*auth
;
488 server
->client_sys
= rpc_clone_client(server
->client
);
489 if (IS_ERR(server
->client_sys
))
490 return PTR_ERR(server
->client_sys
);
491 auth
= rpcauth_create(RPC_AUTH_UNIX
, server
->client_sys
);
493 return PTR_ERR(auth
);
495 atomic_inc(&server
->client
->cl_count
);
496 server
->client_sys
= server
->client
;
498 if (server
->flags
& NFS_MOUNT_VER3
) {
499 #ifdef CONFIG_NFS_V3_ACL
500 if (!(server
->flags
& NFS_MOUNT_NOACL
)) {
501 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
502 /* No errors! Assume that Sun nfsacls are supported */
503 if (!IS_ERR(server
->client_acl
))
504 server
->caps
|= NFS_CAP_ACLS
;
507 server
->flags
&= ~NFS_MOUNT_NOACL
;
508 #endif /* CONFIG_NFS_V3_ACL */
510 * The VFS shouldn't apply the umask to mode bits. We will
511 * do so ourselves when necessary.
513 sb
->s_flags
|= MS_POSIXACL
;
514 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
515 server
->namelen
= NFS3_MAXNAMLEN
;
518 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
519 server
->namelen
= NFS2_MAXNAMLEN
;
522 sb
->s_op
= &nfs_sops
;
523 return nfs_sb_init(sb
, authflavor
);
527 nfs_statfs(struct super_block
*sb
, struct kstatfs
*buf
)
529 struct nfs_server
*server
= NFS_SB(sb
);
530 unsigned char blockbits
;
531 unsigned long blockres
;
532 struct nfs_fh
*rootfh
= NFS_FH(sb
->s_root
->d_inode
);
533 struct nfs_fattr fattr
;
534 struct nfs_fsstat res
= {
541 error
= server
->rpc_ops
->statfs(server
, rootfh
, &res
);
542 buf
->f_type
= NFS_SUPER_MAGIC
;
547 * Current versions of glibc do not correctly handle the
548 * case where f_frsize != f_bsize. Eventually we want to
549 * report the value of wtmult in this field.
551 buf
->f_frsize
= sb
->s_blocksize
;
554 * On most *nix systems, f_blocks, f_bfree, and f_bavail
555 * are reported in units of f_frsize. Linux hasn't had
556 * an f_frsize field in its statfs struct until recently,
557 * thus historically Linux's sys_statfs reports these
558 * fields in units of f_bsize.
560 buf
->f_bsize
= sb
->s_blocksize
;
561 blockbits
= sb
->s_blocksize_bits
;
562 blockres
= (1 << blockbits
) - 1;
563 buf
->f_blocks
= (res
.tbytes
+ blockres
) >> blockbits
;
564 buf
->f_bfree
= (res
.fbytes
+ blockres
) >> blockbits
;
565 buf
->f_bavail
= (res
.abytes
+ blockres
) >> blockbits
;
567 buf
->f_files
= res
.tfiles
;
568 buf
->f_ffree
= res
.afiles
;
570 buf
->f_namelen
= server
->namelen
;
576 dprintk("%s: statfs error = %d\n", __FUNCTION__
, -error
);
577 buf
->f_bsize
= buf
->f_blocks
= buf
->f_bfree
= buf
->f_bavail
= -1;
582 static int nfs_show_options(struct seq_file
*m
, struct vfsmount
*mnt
)
584 static struct proc_nfs_info
{
589 { NFS_MOUNT_SOFT
, ",soft", ",hard" },
590 { NFS_MOUNT_INTR
, ",intr", "" },
591 { NFS_MOUNT_POSIX
, ",posix", "" },
592 { NFS_MOUNT_NOCTO
, ",nocto", "" },
593 { NFS_MOUNT_NOAC
, ",noac", "" },
594 { NFS_MOUNT_NONLM
, ",nolock", ",lock" },
595 { NFS_MOUNT_NOACL
, ",noacl", "" },
598 struct proc_nfs_info
*nfs_infop
;
599 struct nfs_server
*nfss
= NFS_SB(mnt
->mnt_sb
);
603 seq_printf(m
, ",v%d", nfss
->rpc_ops
->version
);
604 seq_printf(m
, ",rsize=%d", nfss
->rsize
);
605 seq_printf(m
, ",wsize=%d", nfss
->wsize
);
606 if (nfss
->acregmin
!= 3*HZ
)
607 seq_printf(m
, ",acregmin=%d", nfss
->acregmin
/HZ
);
608 if (nfss
->acregmax
!= 60*HZ
)
609 seq_printf(m
, ",acregmax=%d", nfss
->acregmax
/HZ
);
610 if (nfss
->acdirmin
!= 30*HZ
)
611 seq_printf(m
, ",acdirmin=%d", nfss
->acdirmin
/HZ
);
612 if (nfss
->acdirmax
!= 60*HZ
)
613 seq_printf(m
, ",acdirmax=%d", nfss
->acdirmax
/HZ
);
614 for (nfs_infop
= nfs_info
; nfs_infop
->flag
; nfs_infop
++) {
615 if (nfss
->flags
& nfs_infop
->flag
)
616 seq_puts(m
, nfs_infop
->str
);
618 seq_puts(m
, nfs_infop
->nostr
);
620 switch (nfss
->client
->cl_xprt
->prot
) {
628 snprintf(buf
, sizeof(buf
), "%u", nfss
->client
->cl_xprt
->prot
);
631 seq_printf(m
, ",proto=%s", proto
);
632 seq_puts(m
, ",addr=");
633 seq_escape(m
, nfss
->hostname
, " \t\n\\");
638 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
640 int nfs_sync_mapping(struct address_space
*mapping
)
644 if (mapping
->nrpages
== 0)
646 unmap_mapping_range(mapping
, 0, 0, 0);
647 ret
= filemap_fdatawrite(mapping
);
650 ret
= filemap_fdatawait(mapping
);
653 ret
= nfs_wb_all(mapping
->host
);
659 * Invalidate the local caches
661 static void nfs_zap_caches_locked(struct inode
*inode
)
663 struct nfs_inode
*nfsi
= NFS_I(inode
);
664 int mode
= inode
->i_mode
;
666 NFS_ATTRTIMEO(inode
) = NFS_MINATTRTIMEO(inode
);
667 NFS_ATTRTIMEO_UPDATE(inode
) = jiffies
;
669 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
670 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
671 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
673 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
676 void nfs_zap_caches(struct inode
*inode
)
678 spin_lock(&inode
->i_lock
);
679 nfs_zap_caches_locked(inode
);
680 spin_unlock(&inode
->i_lock
);
683 static void nfs_zap_acl_cache(struct inode
*inode
)
685 void (*clear_acl_cache
)(struct inode
*);
687 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
688 if (clear_acl_cache
!= NULL
)
689 clear_acl_cache(inode
);
690 spin_lock(&inode
->i_lock
);
691 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
692 spin_unlock(&inode
->i_lock
);
696 * Invalidate, but do not unhash, the inode.
697 * NB: must be called with inode->i_lock held!
699 static void nfs_invalidate_inode(struct inode
*inode
)
701 set_bit(NFS_INO_STALE
, &NFS_FLAGS(inode
));
702 nfs_zap_caches_locked(inode
);
705 struct nfs_find_desc
{
707 struct nfs_fattr
*fattr
;
711 * In NFSv3 we can have 64bit inode numbers. In order to support
712 * this, and re-exported directories (also seen in NFSv2)
713 * we are forced to allow 2 different inodes to have the same
717 nfs_find_actor(struct inode
*inode
, void *opaque
)
719 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
720 struct nfs_fh
*fh
= desc
->fh
;
721 struct nfs_fattr
*fattr
= desc
->fattr
;
723 if (NFS_FILEID(inode
) != fattr
->fileid
)
725 if (nfs_compare_fh(NFS_FH(inode
), fh
))
727 if (is_bad_inode(inode
) || NFS_STALE(inode
))
733 nfs_init_locked(struct inode
*inode
, void *opaque
)
735 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
736 struct nfs_fattr
*fattr
= desc
->fattr
;
738 NFS_FILEID(inode
) = fattr
->fileid
;
739 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
743 /* Don't use READDIRPLUS on directories that we believe are too large */
744 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
747 * This is our front-end to iget that looks up inodes by file handle
748 * instead of inode number.
751 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
753 struct nfs_find_desc desc
= {
757 struct inode
*inode
= NULL
;
760 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
764 printk("NFS: Buggy server - nlink == 0!\n");
768 hash
= nfs_fattr_to_ino_t(fattr
);
770 if (!(inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
)))
773 if (inode
->i_state
& I_NEW
) {
774 struct nfs_inode
*nfsi
= NFS_I(inode
);
776 /* We set i_ino for the few things that still rely on it,
780 /* We can't support update_atime(), since the server will reset it */
781 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
782 inode
->i_mode
= fattr
->mode
;
783 /* Why so? Because we want revalidate for devices/FIFOs, and
784 * that's precisely what we have in nfs_file_inode_operations.
786 inode
->i_op
= NFS_SB(sb
)->rpc_ops
->file_inode_ops
;
787 if (S_ISREG(inode
->i_mode
)) {
788 inode
->i_fop
= &nfs_file_operations
;
789 inode
->i_data
.a_ops
= &nfs_file_aops
;
790 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
791 } else if (S_ISDIR(inode
->i_mode
)) {
792 inode
->i_op
= NFS_SB(sb
)->rpc_ops
->dir_inode_ops
;
793 inode
->i_fop
= &nfs_dir_operations
;
794 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
795 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
796 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_FLAGS(inode
));
797 } else if (S_ISLNK(inode
->i_mode
))
798 inode
->i_op
= &nfs_symlink_inode_operations
;
800 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
802 nfsi
->read_cache_jiffies
= fattr
->time_start
;
803 nfsi
->last_updated
= jiffies
;
804 inode
->i_atime
= fattr
->atime
;
805 inode
->i_mtime
= fattr
->mtime
;
806 inode
->i_ctime
= fattr
->ctime
;
807 if (fattr
->valid
& NFS_ATTR_FATTR_V4
)
808 nfsi
->change_attr
= fattr
->change_attr
;
809 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
810 inode
->i_nlink
= fattr
->nlink
;
811 inode
->i_uid
= fattr
->uid
;
812 inode
->i_gid
= fattr
->gid
;
813 if (fattr
->valid
& (NFS_ATTR_FATTR_V3
| NFS_ATTR_FATTR_V4
)) {
815 * report the blocks in 512byte units
817 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
818 inode
->i_blksize
= inode
->i_sb
->s_blocksize
;
820 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
821 inode
->i_blksize
= fattr
->du
.nfs2
.blocksize
;
823 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
824 nfsi
->attrtimeo_timestamp
= jiffies
;
825 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
826 nfsi
->cache_access
.cred
= NULL
;
828 unlock_new_inode(inode
);
830 nfs_refresh_inode(inode
, fattr
);
831 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
833 (long long)NFS_FILEID(inode
),
834 atomic_read(&inode
->i_count
));
840 printk("nfs_fhget: iget failed\n");
844 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET)
847 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
849 struct inode
*inode
= dentry
->d_inode
;
850 struct nfs_fattr fattr
;
853 if (attr
->ia_valid
& ATTR_SIZE
) {
854 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
855 attr
->ia_valid
&= ~ATTR_SIZE
;
858 /* Optimization: if the end result is no change, don't RPC */
859 attr
->ia_valid
&= NFS_VALID_ATTRS
;
860 if (attr
->ia_valid
== 0)
864 nfs_begin_data_update(inode
);
865 /* Write all dirty data if we're changing file permissions or size */
866 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
|ATTR_SIZE
)) != 0) {
867 if (filemap_fdatawrite(inode
->i_mapping
) == 0)
868 filemap_fdatawait(inode
->i_mapping
);
872 * Return any delegations if we're going to change ACLs
874 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
875 nfs_inode_return_delegation(inode
);
876 error
= NFS_PROTO(inode
)->setattr(dentry
, &fattr
, attr
);
878 nfs_refresh_inode(inode
, &fattr
);
879 nfs_end_data_update(inode
);
885 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
886 * @inode: pointer to struct inode
887 * @attr: pointer to struct iattr
889 * Note: we do this in the *proc.c in order to ensure that
890 * it works for things like exclusive creates too.
892 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
894 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
895 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
896 int mode
= attr
->ia_mode
& S_IALLUGO
;
897 mode
|= inode
->i_mode
& ~S_IALLUGO
;
898 inode
->i_mode
= mode
;
900 if ((attr
->ia_valid
& ATTR_UID
) != 0)
901 inode
->i_uid
= attr
->ia_uid
;
902 if ((attr
->ia_valid
& ATTR_GID
) != 0)
903 inode
->i_gid
= attr
->ia_gid
;
904 spin_lock(&inode
->i_lock
);
905 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
906 spin_unlock(&inode
->i_lock
);
908 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
909 inode
->i_size
= attr
->ia_size
;
910 vmtruncate(inode
, attr
->ia_size
);
914 static int nfs_wait_schedule(void *word
)
916 if (signal_pending(current
))
923 * Wait for the inode to get unlocked.
925 static int nfs_wait_on_inode(struct inode
*inode
)
927 struct rpc_clnt
*clnt
= NFS_CLIENT(inode
);
928 struct nfs_inode
*nfsi
= NFS_I(inode
);
932 rpc_clnt_sigmask(clnt
, &oldmask
);
933 error
= wait_on_bit_lock(&nfsi
->flags
, NFS_INO_REVALIDATING
,
934 nfs_wait_schedule
, TASK_INTERRUPTIBLE
);
935 rpc_clnt_sigunmask(clnt
, &oldmask
);
940 static void nfs_wake_up_inode(struct inode
*inode
)
942 struct nfs_inode
*nfsi
= NFS_I(inode
);
944 clear_bit(NFS_INO_REVALIDATING
, &nfsi
->flags
);
945 smp_mb__after_clear_bit();
946 wake_up_bit(&nfsi
->flags
, NFS_INO_REVALIDATING
);
949 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
951 struct inode
*inode
= dentry
->d_inode
;
952 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
955 if (__IS_FLG(inode
, MS_NOATIME
))
957 else if (__IS_FLG(inode
, MS_NODIRATIME
) && S_ISDIR(inode
->i_mode
))
959 /* We may force a getattr if the user cares about atime */
961 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
963 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
965 generic_fillattr(inode
, stat
);
969 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, struct rpc_cred
*cred
)
971 struct nfs_open_context
*ctx
;
973 ctx
= (struct nfs_open_context
*)kmalloc(sizeof(*ctx
), GFP_KERNEL
);
975 atomic_set(&ctx
->count
, 1);
976 ctx
->dentry
= dget(dentry
);
977 ctx
->cred
= get_rpccred(cred
);
979 ctx
->lockowner
= current
->files
;
986 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
989 atomic_inc(&ctx
->count
);
993 void put_nfs_open_context(struct nfs_open_context
*ctx
)
995 if (atomic_dec_and_test(&ctx
->count
)) {
996 if (!list_empty(&ctx
->list
)) {
997 struct inode
*inode
= ctx
->dentry
->d_inode
;
998 spin_lock(&inode
->i_lock
);
999 list_del(&ctx
->list
);
1000 spin_unlock(&inode
->i_lock
);
1002 if (ctx
->state
!= NULL
)
1003 nfs4_close_state(ctx
->state
, ctx
->mode
);
1004 if (ctx
->cred
!= NULL
)
1005 put_rpccred(ctx
->cred
);
1012 * Ensure that mmap has a recent RPC credential for use when writing out
1015 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
1017 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1018 struct nfs_inode
*nfsi
= NFS_I(inode
);
1020 filp
->private_data
= get_nfs_open_context(ctx
);
1021 spin_lock(&inode
->i_lock
);
1022 list_add(&ctx
->list
, &nfsi
->open_files
);
1023 spin_unlock(&inode
->i_lock
);
1027 * Given an inode, search for an open context with the desired characteristics
1029 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, int mode
)
1031 struct nfs_inode
*nfsi
= NFS_I(inode
);
1032 struct nfs_open_context
*pos
, *ctx
= NULL
;
1034 spin_lock(&inode
->i_lock
);
1035 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
1036 if (cred
!= NULL
&& pos
->cred
!= cred
)
1038 if ((pos
->mode
& mode
) == mode
) {
1039 ctx
= get_nfs_open_context(pos
);
1043 spin_unlock(&inode
->i_lock
);
1047 void nfs_file_clear_open_context(struct file
*filp
)
1049 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1050 struct nfs_open_context
*ctx
= (struct nfs_open_context
*)filp
->private_data
;
1053 filp
->private_data
= NULL
;
1054 spin_lock(&inode
->i_lock
);
1055 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
1056 spin_unlock(&inode
->i_lock
);
1057 put_nfs_open_context(ctx
);
1062 * These allocate and release file read/write context information.
1064 int nfs_open(struct inode
*inode
, struct file
*filp
)
1066 struct nfs_open_context
*ctx
;
1067 struct rpc_cred
*cred
;
1069 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
1071 return PTR_ERR(cred
);
1072 ctx
= alloc_nfs_open_context(filp
->f_dentry
, cred
);
1076 ctx
->mode
= filp
->f_mode
;
1077 nfs_file_set_open_context(filp
, ctx
);
1078 put_nfs_open_context(ctx
);
1082 int nfs_release(struct inode
*inode
, struct file
*filp
)
1084 nfs_file_clear_open_context(filp
);
1089 * This function is called whenever some part of NFS notices that
1090 * the cached attributes have to be refreshed.
1093 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1095 int status
= -ESTALE
;
1096 struct nfs_fattr fattr
;
1097 struct nfs_inode
*nfsi
= NFS_I(inode
);
1099 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
1100 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
1103 if (!inode
|| is_bad_inode(inode
))
1105 if (NFS_STALE(inode
))
1108 status
= nfs_wait_on_inode(inode
);
1111 if (NFS_STALE(inode
)) {
1113 /* Do we trust the cached ESTALE? */
1114 if (NFS_ATTRTIMEO(inode
) != 0) {
1115 if (nfsi
->cache_validity
& (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ATIME
)) {
1122 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), &fattr
);
1124 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
1126 (long long)NFS_FILEID(inode
), status
);
1127 if (status
== -ESTALE
) {
1128 nfs_zap_caches(inode
);
1129 if (!S_ISDIR(inode
->i_mode
))
1130 set_bit(NFS_INO_STALE
, &NFS_FLAGS(inode
));
1135 spin_lock(&inode
->i_lock
);
1136 status
= nfs_update_inode(inode
, &fattr
);
1138 spin_unlock(&inode
->i_lock
);
1139 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
1141 (long long)NFS_FILEID(inode
), status
);
1144 spin_unlock(&inode
->i_lock
);
1146 nfs_revalidate_mapping(inode
, inode
->i_mapping
);
1148 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
1149 nfs_zap_acl_cache(inode
);
1151 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
1153 (long long)NFS_FILEID(inode
));
1156 nfs_wake_up_inode(inode
);
1163 int nfs_attribute_timeout(struct inode
*inode
)
1165 struct nfs_inode
*nfsi
= NFS_I(inode
);
1167 if (nfs_have_delegation(inode
, FMODE_READ
))
1169 return time_after(jiffies
, nfsi
->read_cache_jiffies
+nfsi
->attrtimeo
);
1173 * nfs_revalidate_inode - Revalidate the inode attributes
1174 * @server - pointer to nfs_server struct
1175 * @inode - pointer to inode struct
1177 * Updates inode attribute information by retrieving the data from the server.
1179 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1181 if (!(NFS_I(inode
)->cache_validity
& (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
))
1182 && !nfs_attribute_timeout(inode
))
1183 return NFS_STALE(inode
) ? -ESTALE
: 0;
1184 return __nfs_revalidate_inode(server
, inode
);
1188 * nfs_revalidate_mapping - Revalidate the pagecache
1189 * @inode - pointer to host inode
1190 * @mapping - pointer to mapping
1192 void nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1194 struct nfs_inode
*nfsi
= NFS_I(inode
);
1196 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
) {
1197 if (S_ISREG(inode
->i_mode
))
1198 nfs_sync_mapping(mapping
);
1199 invalidate_inode_pages2(mapping
);
1201 spin_lock(&inode
->i_lock
);
1202 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1203 if (S_ISDIR(inode
->i_mode
)) {
1204 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1205 /* This ensures we revalidate child dentries */
1206 nfsi
->cache_change_attribute
= jiffies
;
1208 spin_unlock(&inode
->i_lock
);
1210 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
1212 (long long)NFS_FILEID(inode
));
1217 * nfs_begin_data_update
1218 * @inode - pointer to inode
1219 * Declare that a set of operations will update file data on the server
1221 void nfs_begin_data_update(struct inode
*inode
)
1223 atomic_inc(&NFS_I(inode
)->data_updates
);
1227 * nfs_end_data_update
1228 * @inode - pointer to inode
1229 * Declare end of the operations that will update file data
1230 * This will mark the inode as immediately needing revalidation
1231 * of its attribute cache.
1233 void nfs_end_data_update(struct inode
*inode
)
1235 struct nfs_inode
*nfsi
= NFS_I(inode
);
1237 if (!nfs_have_delegation(inode
, FMODE_READ
)) {
1238 /* Directories and symlinks: invalidate page cache */
1239 if (S_ISDIR(inode
->i_mode
) || S_ISLNK(inode
->i_mode
)) {
1240 spin_lock(&inode
->i_lock
);
1241 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1242 spin_unlock(&inode
->i_lock
);
1245 nfsi
->cache_change_attribute
= jiffies
;
1246 atomic_dec(&nfsi
->data_updates
);
1250 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1251 * @inode - pointer to inode
1252 * @fattr - updated attributes
1254 * Verifies the attribute cache. If we have just changed the attributes,
1255 * so that fattr carries weak cache consistency data, then it may
1256 * also update the ctime/mtime/change_attribute.
1258 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1260 struct nfs_inode
*nfsi
= NFS_I(inode
);
1261 loff_t cur_size
, new_isize
;
1265 /* Are we in the process of updating data on the server? */
1266 data_unstable
= nfs_caches_unstable(inode
);
1268 if (fattr
->valid
& NFS_ATTR_FATTR_V4
) {
1269 if ((fattr
->valid
& NFS_ATTR_PRE_CHANGE
) != 0
1270 && nfsi
->change_attr
== fattr
->pre_change_attr
)
1271 nfsi
->change_attr
= fattr
->change_attr
;
1272 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1273 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1275 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1279 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0) {
1283 /* Has the inode gone and changed behind our back? */
1284 if (nfsi
->fileid
!= fattr
->fileid
1285 || (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1289 cur_size
= i_size_read(inode
);
1290 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1292 /* If we have atomic WCC data, we may update some attributes */
1293 if ((fattr
->valid
& NFS_ATTR_WCC
) != 0) {
1294 if (timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
))
1295 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1296 if (timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
))
1297 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1300 /* Verify a few of the more important attributes */
1301 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1302 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1304 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1306 if (cur_size
!= new_isize
) {
1307 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1308 if (nfsi
->npages
== 0)
1309 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1312 /* Have any file permissions changed? */
1313 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)
1314 || inode
->i_uid
!= fattr
->uid
1315 || inode
->i_gid
!= fattr
->gid
)
1316 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1318 /* Has the link count changed? */
1319 if (inode
->i_nlink
!= fattr
->nlink
)
1320 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1322 if (!timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1323 nfsi
->cache_validity
|= NFS_INO_INVALID_ATIME
;
1325 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1330 * nfs_refresh_inode - try to update the inode attribute cache
1331 * @inode - pointer to inode
1332 * @fattr - updated attributes
1334 * Check that an RPC call that returned attributes has not overlapped with
1335 * other recent updates of the inode metadata, then decide whether it is
1336 * safe to do a full update of the inode attributes, or whether just to
1337 * call nfs_check_inode_attributes.
1339 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1341 struct nfs_inode
*nfsi
= NFS_I(inode
);
1344 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1346 spin_lock(&inode
->i_lock
);
1347 nfsi
->cache_validity
&= ~NFS_INO_REVAL_PAGECACHE
;
1348 if (time_after(fattr
->time_start
, nfsi
->last_updated
))
1349 status
= nfs_update_inode(inode
, fattr
);
1351 status
= nfs_check_inode_attributes(inode
, fattr
);
1353 spin_unlock(&inode
->i_lock
);
1358 * nfs_post_op_update_inode - try to update the inode attribute cache
1359 * @inode - pointer to inode
1360 * @fattr - updated attributes
1362 * After an operation that has changed the inode metadata, mark the
1363 * attribute cache as being invalid, then try to update it.
1365 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1367 struct nfs_inode
*nfsi
= NFS_I(inode
);
1370 spin_lock(&inode
->i_lock
);
1371 if (unlikely((fattr
->valid
& NFS_ATTR_FATTR
) == 0)) {
1372 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
;
1375 status
= nfs_update_inode(inode
, fattr
);
1377 spin_unlock(&inode
->i_lock
);
1382 * Many nfs protocol calls return the new file attributes after
1383 * an operation. Here we update the inode to reflect the state
1384 * of the server's inode.
1386 * This is a bit tricky because we have to make sure all dirty pages
1387 * have been sent off to the server before calling invalidate_inode_pages.
1388 * To make sure no other process adds more write requests while we try
1389 * our best to flush them, we make them sleep during the attribute refresh.
1391 * A very similar scenario holds for the dir cache.
1393 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1395 struct nfs_inode
*nfsi
= NFS_I(inode
);
1396 loff_t cur_isize
, new_isize
;
1397 unsigned int invalid
= 0;
1400 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1401 __FUNCTION__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1402 atomic_read(&inode
->i_count
), fattr
->valid
);
1404 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1407 if (nfsi
->fileid
!= fattr
->fileid
)
1411 * Make sure the inode's type hasn't changed.
1413 if ((inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1417 * Update the read time so we don't revalidate too often.
1419 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1420 nfsi
->last_updated
= jiffies
;
1422 /* Are we racing with known updates of the metadata on the server? */
1423 data_stable
= nfs_verify_change_attribute(inode
, fattr
->time_start
);
1425 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ATIME
);
1427 /* Check if our cached file size is stale */
1428 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1429 cur_isize
= i_size_read(inode
);
1430 if (new_isize
!= cur_isize
) {
1431 /* Do we perhaps have any outstanding writes? */
1432 if (nfsi
->npages
== 0) {
1433 /* No, but did we race with nfs_end_data_update()? */
1435 inode
->i_size
= new_isize
;
1436 invalid
|= NFS_INO_INVALID_DATA
;
1438 invalid
|= NFS_INO_INVALID_ATTR
;
1439 } else if (new_isize
> cur_isize
) {
1440 inode
->i_size
= new_isize
;
1441 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1443 nfsi
->cache_change_attribute
= jiffies
;
1444 dprintk("NFS: isize change on server for file %s/%ld\n",
1445 inode
->i_sb
->s_id
, inode
->i_ino
);
1448 /* Check if the mtime agrees */
1449 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1450 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1451 dprintk("NFS: mtime change on server for file %s/%ld\n",
1452 inode
->i_sb
->s_id
, inode
->i_ino
);
1453 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1454 nfsi
->cache_change_attribute
= jiffies
;
1457 if ((fattr
->valid
& NFS_ATTR_FATTR_V4
)
1458 && nfsi
->change_attr
!= fattr
->change_attr
) {
1459 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1460 inode
->i_sb
->s_id
, inode
->i_ino
);
1461 nfsi
->change_attr
= fattr
->change_attr
;
1462 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1463 nfsi
->cache_change_attribute
= jiffies
;
1466 /* If ctime has changed we should definitely clear access+acl caches */
1467 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1468 invalid
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1469 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1470 nfsi
->cache_change_attribute
= jiffies
;
1472 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1474 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
) ||
1475 inode
->i_uid
!= fattr
->uid
||
1476 inode
->i_gid
!= fattr
->gid
)
1477 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1479 inode
->i_mode
= fattr
->mode
;
1480 inode
->i_nlink
= fattr
->nlink
;
1481 inode
->i_uid
= fattr
->uid
;
1482 inode
->i_gid
= fattr
->gid
;
1484 if (fattr
->valid
& (NFS_ATTR_FATTR_V3
| NFS_ATTR_FATTR_V4
)) {
1486 * report the blocks in 512byte units
1488 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1489 inode
->i_blksize
= inode
->i_sb
->s_blocksize
;
1491 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1492 inode
->i_blksize
= fattr
->du
.nfs2
.blocksize
;
1495 /* Update attrtimeo value if we're out of the unstable period */
1496 if (invalid
& NFS_INO_INVALID_ATTR
) {
1497 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1498 nfsi
->attrtimeo_timestamp
= jiffies
;
1499 } else if (time_after(jiffies
, nfsi
->attrtimeo_timestamp
+nfsi
->attrtimeo
)) {
1500 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1501 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1502 nfsi
->attrtimeo_timestamp
= jiffies
;
1504 /* Don't invalidate the data if we were to blame */
1505 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1506 || S_ISLNK(inode
->i_mode
)))
1507 invalid
&= ~NFS_INO_INVALID_DATA
;
1509 invalid
&= ~(NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ATIME
|NFS_INO_REVAL_PAGECACHE
);
1510 if (!nfs_have_delegation(inode
, FMODE_READ
))
1511 nfsi
->cache_validity
|= invalid
;
1516 * Big trouble! The inode has become a different object.
1519 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1520 __FUNCTION__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1524 * No need to worry about unhashing the dentry, as the
1525 * lookup validation will know that the inode is bad.
1526 * (But we fall through to invalidate the caches.)
1528 nfs_invalidate_inode(inode
);
1532 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1533 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1534 NFS_SERVER(inode
)->hostname
, inode
->i_sb
->s_id
,
1535 (long long)nfsi
->fileid
, (long long)fattr
->fileid
);
1540 * File system information
1543 static int nfs_set_super(struct super_block
*s
, void *data
)
1545 s
->s_fs_info
= data
;
1546 return set_anon_super(s
, data
);
1549 static int nfs_compare_super(struct super_block
*sb
, void *data
)
1551 struct nfs_server
*server
= data
;
1552 struct nfs_server
*old
= NFS_SB(sb
);
1554 if (old
->addr
.sin_addr
.s_addr
!= server
->addr
.sin_addr
.s_addr
)
1556 if (old
->addr
.sin_port
!= server
->addr
.sin_port
)
1558 return !nfs_compare_fh(&old
->fh
, &server
->fh
);
1561 static struct super_block
*nfs_get_sb(struct file_system_type
*fs_type
,
1562 int flags
, const char *dev_name
, void *raw_data
)
1565 struct nfs_server
*server
= NULL
;
1566 struct super_block
*s
;
1567 struct nfs_fh
*root
;
1568 struct nfs_mount_data
*data
= raw_data
;
1570 s
= ERR_PTR(-EINVAL
);
1572 dprintk("%s: missing data argument\n", __FUNCTION__
);
1575 if (data
->version
<= 0 || data
->version
> NFS_MOUNT_VERSION
) {
1576 dprintk("%s: bad mount version\n", __FUNCTION__
);
1579 switch (data
->version
) {
1585 if (data
->flags
& NFS_MOUNT_VER3
) {
1586 dprintk("%s: mount structure version %d does not support NFSv3\n",
1591 data
->root
.size
= NFS2_FHSIZE
;
1592 memcpy(data
->root
.data
, data
->old_root
.data
, NFS2_FHSIZE
);
1594 if (data
->flags
& NFS_MOUNT_SECFLAVOUR
) {
1595 dprintk("%s: mount structure version %d does not support strong security\n",
1601 memset(data
->context
, 0, sizeof(data
->context
));
1603 #ifndef CONFIG_NFS_V3
1604 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1605 s
= ERR_PTR(-EPROTONOSUPPORT
);
1606 if (data
->flags
& NFS_MOUNT_VER3
) {
1607 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__
);
1610 #endif /* CONFIG_NFS_V3 */
1612 s
= ERR_PTR(-ENOMEM
);
1613 server
= kmalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1616 memset(server
, 0, sizeof(struct nfs_server
));
1617 /* Zero out the NFS state stuff */
1618 init_nfsv4_state(server
);
1619 server
->client
= server
->client_sys
= server
->client_acl
= ERR_PTR(-EINVAL
);
1622 if (data
->flags
& NFS_MOUNT_VER3
)
1623 root
->size
= data
->root
.size
;
1625 root
->size
= NFS2_FHSIZE
;
1626 s
= ERR_PTR(-EINVAL
);
1627 if (root
->size
> sizeof(root
->data
)) {
1628 dprintk("%s: invalid root filehandle\n", __FUNCTION__
);
1631 memcpy(root
->data
, data
->root
.data
, root
->size
);
1633 /* We now require that the mount process passes the remote address */
1634 memcpy(&server
->addr
, &data
->addr
, sizeof(server
->addr
));
1635 if (server
->addr
.sin_addr
.s_addr
== INADDR_ANY
) {
1636 dprintk("%s: mount program didn't pass remote address!\n",
1641 /* Fire up rpciod if not yet running */
1642 s
= ERR_PTR(rpciod_up());
1644 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1645 __FUNCTION__
, PTR_ERR(s
));
1649 s
= sget(fs_type
, nfs_compare_super
, nfs_set_super
, server
);
1650 if (IS_ERR(s
) || s
->s_root
)
1651 goto out_rpciod_down
;
1655 error
= nfs_fill_super(s
, data
, flags
& MS_VERBOSE
? 1 : 0);
1657 up_write(&s
->s_umount
);
1658 deactivate_super(s
);
1659 return ERR_PTR(error
);
1661 s
->s_flags
|= MS_ACTIVE
;
1670 static void nfs_kill_super(struct super_block
*s
)
1672 struct nfs_server
*server
= NFS_SB(s
);
1676 if (!IS_ERR(server
->client
))
1677 rpc_shutdown_client(server
->client
);
1678 if (!IS_ERR(server
->client_sys
))
1679 rpc_shutdown_client(server
->client_sys
);
1680 if (!IS_ERR(server
->client_acl
))
1681 rpc_shutdown_client(server
->client_acl
);
1683 if (!(server
->flags
& NFS_MOUNT_NONLM
))
1684 lockd_down(); /* release rpc.lockd */
1686 rpciod_down(); /* release rpciod */
1688 kfree(server
->hostname
);
1692 static struct file_system_type nfs_fs_type
= {
1693 .owner
= THIS_MODULE
,
1695 .get_sb
= nfs_get_sb
,
1696 .kill_sb
= nfs_kill_super
,
1697 .fs_flags
= FS_ODD_RENAME
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
1700 #ifdef CONFIG_NFS_V4
1702 static void nfs4_clear_inode(struct inode
*);
1705 static struct super_operations nfs4_sops
= {
1706 .alloc_inode
= nfs_alloc_inode
,
1707 .destroy_inode
= nfs_destroy_inode
,
1708 .write_inode
= nfs_write_inode
,
1709 .delete_inode
= nfs_delete_inode
,
1710 .statfs
= nfs_statfs
,
1711 .clear_inode
= nfs4_clear_inode
,
1712 .umount_begin
= nfs_umount_begin
,
1713 .show_options
= nfs_show_options
,
1717 * Clean out any remaining NFSv4 state that might be left over due
1718 * to open() calls that passed nfs_atomic_lookup, but failed to call
1721 static void nfs4_clear_inode(struct inode
*inode
)
1723 struct nfs_inode
*nfsi
= NFS_I(inode
);
1725 /* If we are holding a delegation, return it! */
1726 nfs_inode_return_delegation(inode
);
1727 /* First call standard NFS clear_inode() code */
1728 nfs_clear_inode(inode
);
1729 /* Now clear out any remaining state */
1730 while (!list_empty(&nfsi
->open_states
)) {
1731 struct nfs4_state
*state
;
1733 state
= list_entry(nfsi
->open_states
.next
,
1736 dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
1739 (long long)NFS_FILEID(inode
),
1741 BUG_ON(atomic_read(&state
->count
) != 1);
1742 nfs4_close_state(state
, state
->state
);
1747 static int nfs4_fill_super(struct super_block
*sb
, struct nfs4_mount_data
*data
, int silent
)
1749 struct nfs_server
*server
;
1750 struct nfs4_client
*clp
= NULL
;
1751 struct rpc_xprt
*xprt
= NULL
;
1752 struct rpc_clnt
*clnt
= NULL
;
1753 struct rpc_timeout timeparms
;
1754 rpc_authflavor_t authflavour
;
1757 sb
->s_blocksize_bits
= 0;
1758 sb
->s_blocksize
= 0;
1759 server
= NFS_SB(sb
);
1760 if (data
->rsize
!= 0)
1761 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1762 if (data
->wsize
!= 0)
1763 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1764 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
1765 server
->caps
= NFS_CAP_ATOMIC_OPEN
;
1767 server
->acregmin
= data
->acregmin
*HZ
;
1768 server
->acregmax
= data
->acregmax
*HZ
;
1769 server
->acdirmin
= data
->acdirmin
*HZ
;
1770 server
->acdirmax
= data
->acdirmax
*HZ
;
1772 server
->rpc_ops
= &nfs_v4_clientops
;
1774 nfs_init_timeout_values(&timeparms
, data
->proto
, data
->timeo
, data
->retrans
);
1776 clp
= nfs4_get_client(&server
->addr
.sin_addr
);
1778 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__
);
1782 /* Now create transport and client */
1783 authflavour
= RPC_AUTH_UNIX
;
1784 if (data
->auth_flavourlen
!= 0) {
1785 if (data
->auth_flavourlen
!= 1) {
1786 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1787 __FUNCTION__
, data
->auth_flavourlen
);
1791 if (copy_from_user(&authflavour
, data
->auth_flavours
, sizeof(authflavour
))) {
1797 down_write(&clp
->cl_sem
);
1798 if (IS_ERR(clp
->cl_rpcclient
)) {
1799 xprt
= xprt_create_proto(data
->proto
, &server
->addr
, &timeparms
);
1801 up_write(&clp
->cl_sem
);
1802 err
= PTR_ERR(xprt
);
1803 dprintk("%s: cannot create RPC transport. Error = %d\n",
1807 clnt
= rpc_create_client(xprt
, server
->hostname
, &nfs_program
,
1808 server
->rpc_ops
->version
, authflavour
);
1810 up_write(&clp
->cl_sem
);
1811 err
= PTR_ERR(clnt
);
1812 dprintk("%s: cannot create RPC client. Error = %d\n",
1817 clnt
->cl_softrtry
= 1;
1818 clnt
->cl_chatty
= 1;
1819 clp
->cl_rpcclient
= clnt
;
1820 memcpy(clp
->cl_ipaddr
, server
->ip_addr
, sizeof(clp
->cl_ipaddr
));
1823 list_add_tail(&server
->nfs4_siblings
, &clp
->cl_superblocks
);
1824 clnt
= rpc_clone_client(clp
->cl_rpcclient
);
1826 server
->nfs4_state
= clp
;
1827 up_write(&clp
->cl_sem
);
1831 err
= PTR_ERR(clnt
);
1832 dprintk("%s: cannot create RPC client. Error = %d\n",
1837 server
->client
= clnt
;
1839 if (server
->nfs4_state
->cl_idmap
== NULL
) {
1840 dprintk("%s: failed to create idmapper.\n", __FUNCTION__
);
1844 if (clnt
->cl_auth
->au_flavor
!= authflavour
) {
1845 struct rpc_auth
*auth
;
1847 auth
= rpcauth_create(authflavour
, clnt
);
1849 dprintk("%s: couldn't create credcache!\n", __FUNCTION__
);
1850 return PTR_ERR(auth
);
1854 sb
->s_time_gran
= 1;
1856 sb
->s_op
= &nfs4_sops
;
1857 err
= nfs_sb_init(sb
, authflavour
);
1862 nfs4_put_client(clp
);
1866 static int nfs4_compare_super(struct super_block
*sb
, void *data
)
1868 struct nfs_server
*server
= data
;
1869 struct nfs_server
*old
= NFS_SB(sb
);
1871 if (strcmp(server
->hostname
, old
->hostname
) != 0)
1873 if (strcmp(server
->mnt_path
, old
->mnt_path
) != 0)
1879 nfs_copy_user_string(char *dst
, struct nfs_string
*src
, int maxlen
)
1884 return ERR_PTR(-EINVAL
);
1885 if (src
->len
< maxlen
)
1888 p
= dst
= kmalloc(maxlen
+ 1, GFP_KERNEL
);
1890 return ERR_PTR(-ENOMEM
);
1892 if (copy_from_user(dst
, src
->data
, maxlen
)) {
1894 return ERR_PTR(-EFAULT
);
1900 static struct super_block
*nfs4_get_sb(struct file_system_type
*fs_type
,
1901 int flags
, const char *dev_name
, void *raw_data
)
1904 struct nfs_server
*server
;
1905 struct super_block
*s
;
1906 struct nfs4_mount_data
*data
= raw_data
;
1910 dprintk("%s: missing data argument\n", __FUNCTION__
);
1911 return ERR_PTR(-EINVAL
);
1913 if (data
->version
<= 0 || data
->version
> NFS4_MOUNT_VERSION
) {
1914 dprintk("%s: bad mount version\n", __FUNCTION__
);
1915 return ERR_PTR(-EINVAL
);
1918 server
= kmalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1920 return ERR_PTR(-ENOMEM
);
1921 memset(server
, 0, sizeof(struct nfs_server
));
1922 /* Zero out the NFS state stuff */
1923 init_nfsv4_state(server
);
1924 server
->client
= server
->client_sys
= server
->client_acl
= ERR_PTR(-EINVAL
);
1926 p
= nfs_copy_user_string(NULL
, &data
->hostname
, 256);
1929 server
->hostname
= p
;
1931 p
= nfs_copy_user_string(NULL
, &data
->mnt_path
, 1024);
1934 server
->mnt_path
= p
;
1936 p
= nfs_copy_user_string(server
->ip_addr
, &data
->client_addr
,
1937 sizeof(server
->ip_addr
) - 1);
1941 /* We now require that the mount process passes the remote address */
1942 if (data
->host_addrlen
!= sizeof(server
->addr
)) {
1943 s
= ERR_PTR(-EINVAL
);
1946 if (copy_from_user(&server
->addr
, data
->host_addr
, sizeof(server
->addr
))) {
1947 s
= ERR_PTR(-EFAULT
);
1950 if (server
->addr
.sin_family
!= AF_INET
||
1951 server
->addr
.sin_addr
.s_addr
== INADDR_ANY
) {
1952 dprintk("%s: mount program didn't pass remote IP address!\n",
1954 s
= ERR_PTR(-EINVAL
);
1958 /* Fire up rpciod if not yet running */
1959 s
= ERR_PTR(rpciod_up());
1961 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1962 __FUNCTION__
, PTR_ERR(s
));
1966 s
= sget(fs_type
, nfs4_compare_super
, nfs_set_super
, server
);
1968 if (IS_ERR(s
) || s
->s_root
)
1973 error
= nfs4_fill_super(s
, data
, flags
& MS_VERBOSE
? 1 : 0);
1975 up_write(&s
->s_umount
);
1976 deactivate_super(s
);
1977 return ERR_PTR(error
);
1979 s
->s_flags
|= MS_ACTIVE
;
1982 s
= (struct super_block
*)p
;
1984 kfree(server
->mnt_path
);
1985 kfree(server
->hostname
);
1990 static void nfs4_kill_super(struct super_block
*sb
)
1992 struct nfs_server
*server
= NFS_SB(sb
);
1994 nfs_return_all_delegations(sb
);
1995 kill_anon_super(sb
);
1997 nfs4_renewd_prepare_shutdown(server
);
1999 if (server
->client
!= NULL
&& !IS_ERR(server
->client
))
2000 rpc_shutdown_client(server
->client
);
2001 rpciod_down(); /* release rpciod */
2003 destroy_nfsv4_state(server
);
2005 kfree(server
->hostname
);
2009 static struct file_system_type nfs4_fs_type
= {
2010 .owner
= THIS_MODULE
,
2012 .get_sb
= nfs4_get_sb
,
2013 .kill_sb
= nfs4_kill_super
,
2014 .fs_flags
= FS_ODD_RENAME
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
2017 #define nfs4_init_once(nfsi) \
2019 INIT_LIST_HEAD(&(nfsi)->open_states); \
2020 nfsi->delegation = NULL; \
2021 nfsi->delegation_state = 0; \
2022 init_rwsem(&nfsi->rwsem); \
2024 #define register_nfs4fs() register_filesystem(&nfs4_fs_type)
2025 #define unregister_nfs4fs() unregister_filesystem(&nfs4_fs_type)
2027 #define nfs4_init_once(nfsi) \
2029 #define register_nfs4fs() (0)
2030 #define unregister_nfs4fs()
2033 extern int nfs_init_nfspagecache(void);
2034 extern void nfs_destroy_nfspagecache(void);
2035 extern int nfs_init_readpagecache(void);
2036 extern void nfs_destroy_readpagecache(void);
2037 extern int nfs_init_writepagecache(void);
2038 extern void nfs_destroy_writepagecache(void);
2039 #ifdef CONFIG_NFS_DIRECTIO
2040 extern int nfs_init_directcache(void);
2041 extern void nfs_destroy_directcache(void);
2044 static kmem_cache_t
* nfs_inode_cachep
;
2046 static struct inode
*nfs_alloc_inode(struct super_block
*sb
)
2048 struct nfs_inode
*nfsi
;
2049 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, SLAB_KERNEL
);
2053 nfsi
->cache_validity
= 0UL;
2054 nfsi
->cache_change_attribute
= jiffies
;
2055 #ifdef CONFIG_NFS_V3_ACL
2056 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
2057 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
2059 #ifdef CONFIG_NFS_V4
2060 nfsi
->nfs4_acl
= NULL
;
2061 #endif /* CONFIG_NFS_V4 */
2062 return &nfsi
->vfs_inode
;
2065 static void nfs_destroy_inode(struct inode
*inode
)
2067 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
2070 static void init_once(void * foo
, kmem_cache_t
* cachep
, unsigned long flags
)
2072 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
2074 if ((flags
& (SLAB_CTOR_VERIFY
|SLAB_CTOR_CONSTRUCTOR
)) ==
2075 SLAB_CTOR_CONSTRUCTOR
) {
2076 inode_init_once(&nfsi
->vfs_inode
);
2077 spin_lock_init(&nfsi
->req_lock
);
2078 INIT_LIST_HEAD(&nfsi
->dirty
);
2079 INIT_LIST_HEAD(&nfsi
->commit
);
2080 INIT_LIST_HEAD(&nfsi
->open_files
);
2081 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
2082 atomic_set(&nfsi
->data_updates
, 0);
2086 nfs4_init_once(nfsi
);
2090 static int nfs_init_inodecache(void)
2092 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
2093 sizeof(struct nfs_inode
),
2094 0, SLAB_RECLAIM_ACCOUNT
,
2096 if (nfs_inode_cachep
== NULL
)
2102 static void nfs_destroy_inodecache(void)
2104 if (kmem_cache_destroy(nfs_inode_cachep
))
2105 printk(KERN_INFO
"nfs_inode_cache: not all structures were freed\n");
2111 static int __init
init_nfs_fs(void)
2115 err
= nfs_init_nfspagecache();
2119 err
= nfs_init_inodecache();
2123 err
= nfs_init_readpagecache();
2127 err
= nfs_init_writepagecache();
2131 #ifdef CONFIG_NFS_DIRECTIO
2132 err
= nfs_init_directcache();
2137 #ifdef CONFIG_PROC_FS
2138 rpc_proc_register(&nfs_rpcstat
);
2140 err
= register_filesystem(&nfs_fs_type
);
2143 if ((err
= register_nfs4fs()) != 0)
2147 #ifdef CONFIG_PROC_FS
2148 rpc_proc_unregister("nfs");
2150 #ifdef CONFIG_NFS_DIRECTIO
2151 nfs_destroy_directcache();
2154 nfs_destroy_writepagecache();
2156 nfs_destroy_readpagecache();
2158 nfs_destroy_inodecache();
2160 nfs_destroy_nfspagecache();
2165 static void __exit
exit_nfs_fs(void)
2167 #ifdef CONFIG_NFS_DIRECTIO
2168 nfs_destroy_directcache();
2170 nfs_destroy_writepagecache();
2171 nfs_destroy_readpagecache();
2172 nfs_destroy_inodecache();
2173 nfs_destroy_nfspagecache();
2174 #ifdef CONFIG_PROC_FS
2175 rpc_proc_unregister("nfs");
2177 unregister_filesystem(&nfs_fs_type
);
2178 unregister_nfs4fs();
2181 /* Not quite true; I just maintain it */
2182 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2183 MODULE_LICENSE("GPL");
2185 module_init(init_nfs_fs
)
2186 module_exit(exit_nfs_fs
)