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
*, unsigned long);
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
);
151 * The following should never happen...
153 if (nfs_have_writebacks(inode
)) {
154 printk(KERN_ERR
"nfs_delete_inode: inode %ld has pending RPC requests\n", inode
->i_ino
);
161 nfs_clear_inode(struct inode
*inode
)
163 struct nfs_inode
*nfsi
= NFS_I(inode
);
164 struct rpc_cred
*cred
;
167 BUG_ON (!list_empty(&nfsi
->open_files
));
168 nfs_zap_acl_cache(inode
);
169 cred
= nfsi
->cache_access
.cred
;
172 BUG_ON(atomic_read(&nfsi
->data_updates
) != 0);
176 nfs_umount_begin(struct super_block
*sb
)
178 struct rpc_clnt
*rpc
= NFS_SB(sb
)->client
;
180 /* -EIO all pending I/O */
182 rpc_killall_tasks(rpc
);
183 rpc
= NFS_SB(sb
)->client_acl
;
185 rpc_killall_tasks(rpc
);
189 static inline unsigned long
190 nfs_block_bits(unsigned long bsize
, unsigned char *nrbitsp
)
192 /* make sure blocksize is a power of two */
193 if ((bsize
& (bsize
- 1)) || nrbitsp
) {
194 unsigned char nrbits
;
196 for (nrbits
= 31; nrbits
&& !(bsize
& (1 << nrbits
)); nrbits
--)
207 * Calculate the number of 512byte blocks used.
209 static inline unsigned long
210 nfs_calc_block_size(u64 tsize
)
212 loff_t used
= (tsize
+ 511) >> 9;
213 return (used
> ULONG_MAX
) ? ULONG_MAX
: used
;
217 * Compute and set NFS server blocksize
219 static inline unsigned long
220 nfs_block_size(unsigned long bsize
, unsigned char *nrbitsp
)
223 bsize
= NFS_DEF_FILE_IO_BUFFER_SIZE
;
224 else if (bsize
>= NFS_MAX_FILE_IO_BUFFER_SIZE
)
225 bsize
= NFS_MAX_FILE_IO_BUFFER_SIZE
;
227 return nfs_block_bits(bsize
, nrbitsp
);
231 * Obtain the root inode of the file system.
233 static struct inode
*
234 nfs_get_root(struct super_block
*sb
, struct nfs_fh
*rootfh
, struct nfs_fsinfo
*fsinfo
)
236 struct nfs_server
*server
= NFS_SB(sb
);
240 error
= server
->rpc_ops
->getroot(server
, rootfh
, fsinfo
);
242 dprintk("nfs_get_root: getattr error = %d\n", -error
);
243 return ERR_PTR(error
);
246 rooti
= nfs_fhget(sb
, rootfh
, fsinfo
->fattr
);
248 return ERR_PTR(-ENOMEM
);
253 * Do NFS version-independent mount processing, and sanity checking
256 nfs_sb_init(struct super_block
*sb
, rpc_authflavor_t authflavor
)
258 struct nfs_server
*server
;
259 struct inode
*root_inode
;
260 struct nfs_fattr fattr
;
261 struct nfs_fsinfo fsinfo
= {
264 struct nfs_pathconf pathinfo
= {
267 int no_root_error
= 0;
268 unsigned long max_rpc_payload
;
270 /* We probably want something more informative here */
271 snprintf(sb
->s_id
, sizeof(sb
->s_id
), "%x:%x", MAJOR(sb
->s_dev
), MINOR(sb
->s_dev
));
275 sb
->s_magic
= NFS_SUPER_MAGIC
;
277 root_inode
= nfs_get_root(sb
, &server
->fh
, &fsinfo
);
278 /* Did getting the root inode fail? */
279 if (IS_ERR(root_inode
)) {
280 no_root_error
= PTR_ERR(root_inode
);
283 sb
->s_root
= d_alloc_root(root_inode
);
285 no_root_error
= -ENOMEM
;
288 sb
->s_root
->d_op
= server
->rpc_ops
->dentry_ops
;
290 /* Get some general file system info */
291 if (server
->namelen
== 0 &&
292 server
->rpc_ops
->pathconf(server
, &server
->fh
, &pathinfo
) >= 0)
293 server
->namelen
= pathinfo
.max_namelen
;
294 /* Work out a lot of parameters */
295 if (server
->rsize
== 0)
296 server
->rsize
= nfs_block_size(fsinfo
.rtpref
, NULL
);
297 if (server
->wsize
== 0)
298 server
->wsize
= nfs_block_size(fsinfo
.wtpref
, NULL
);
300 if (fsinfo
.rtmax
>= 512 && server
->rsize
> fsinfo
.rtmax
)
301 server
->rsize
= nfs_block_size(fsinfo
.rtmax
, NULL
);
302 if (fsinfo
.wtmax
>= 512 && server
->wsize
> fsinfo
.wtmax
)
303 server
->wsize
= nfs_block_size(fsinfo
.wtmax
, NULL
);
305 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
306 if (server
->rsize
> max_rpc_payload
)
307 server
->rsize
= max_rpc_payload
;
308 if (server
->wsize
> max_rpc_payload
)
309 server
->wsize
= max_rpc_payload
;
311 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
312 if (server
->rpages
> NFS_READ_MAXIOV
) {
313 server
->rpages
= NFS_READ_MAXIOV
;
314 server
->rsize
= server
->rpages
<< PAGE_CACHE_SHIFT
;
317 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
318 if (server
->wpages
> NFS_WRITE_MAXIOV
) {
319 server
->wpages
= NFS_WRITE_MAXIOV
;
320 server
->wsize
= server
->wpages
<< PAGE_CACHE_SHIFT
;
323 if (sb
->s_blocksize
== 0)
324 sb
->s_blocksize
= nfs_block_bits(server
->wsize
,
325 &sb
->s_blocksize_bits
);
326 server
->wtmult
= nfs_block_bits(fsinfo
.wtmult
, NULL
);
328 server
->dtsize
= nfs_block_size(fsinfo
.dtpref
, NULL
);
329 if (server
->dtsize
> PAGE_CACHE_SIZE
)
330 server
->dtsize
= PAGE_CACHE_SIZE
;
331 if (server
->dtsize
> server
->rsize
)
332 server
->dtsize
= server
->rsize
;
334 if (server
->flags
& NFS_MOUNT_NOAC
) {
335 server
->acregmin
= server
->acregmax
= 0;
336 server
->acdirmin
= server
->acdirmax
= 0;
337 sb
->s_flags
|= MS_SYNCHRONOUS
;
339 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
341 sb
->s_maxbytes
= fsinfo
.maxfilesize
;
342 if (sb
->s_maxbytes
> MAX_LFS_FILESIZE
)
343 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
345 server
->client
->cl_intr
= (server
->flags
& NFS_MOUNT_INTR
) ? 1 : 0;
346 server
->client
->cl_softrtry
= (server
->flags
& NFS_MOUNT_SOFT
) ? 1 : 0;
348 /* We're airborne Set socket buffersize */
349 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
351 /* Yargs. It didn't work out. */
353 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error
);
354 if (!IS_ERR(root_inode
))
356 return no_root_error
;
360 * Create an RPC client handle.
362 static struct rpc_clnt
*
363 nfs_create_client(struct nfs_server
*server
, const struct nfs_mount_data
*data
)
365 struct rpc_timeout timeparms
;
366 struct rpc_xprt
*xprt
= NULL
;
367 struct rpc_clnt
*clnt
= NULL
;
368 int tcp
= (data
->flags
& NFS_MOUNT_TCP
);
370 /* Initialize timeout values */
371 timeparms
.to_initval
= data
->timeo
* HZ
/ 10;
372 timeparms
.to_retries
= data
->retrans
;
373 timeparms
.to_maxval
= tcp
? RPC_MAX_TCP_TIMEOUT
: RPC_MAX_UDP_TIMEOUT
;
374 timeparms
.to_exponential
= 1;
376 if (!timeparms
.to_initval
)
377 timeparms
.to_initval
= (tcp
? 600 : 11) * HZ
/ 10;
378 if (!timeparms
.to_retries
)
379 timeparms
.to_retries
= 5;
381 /* create transport and client */
382 xprt
= xprt_create_proto(tcp
? IPPROTO_TCP
: IPPROTO_UDP
,
383 &server
->addr
, &timeparms
);
385 dprintk("%s: cannot create RPC transport. Error = %ld\n",
386 __FUNCTION__
, PTR_ERR(xprt
));
387 return (struct rpc_clnt
*)xprt
;
389 clnt
= rpc_create_client(xprt
, server
->hostname
, &nfs_program
,
390 server
->rpc_ops
->version
, data
->pseudoflavor
);
392 dprintk("%s: cannot create RPC client. Error = %ld\n",
393 __FUNCTION__
, PTR_ERR(xprt
));
398 clnt
->cl_softrtry
= 1;
408 * The way this works is that the mount process passes a structure
409 * in the data argument which contains the server's IP address
410 * and the root file handle obtained from the server's mount
411 * daemon. We stash these away in the private superblock fields.
414 nfs_fill_super(struct super_block
*sb
, struct nfs_mount_data
*data
, int silent
)
416 struct nfs_server
*server
;
417 rpc_authflavor_t authflavor
;
420 sb
->s_blocksize_bits
= 0;
423 sb
->s_blocksize
= nfs_block_size(data
->bsize
, &sb
->s_blocksize_bits
);
425 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
427 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
428 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
430 server
->acregmin
= data
->acregmin
*HZ
;
431 server
->acregmax
= data
->acregmax
*HZ
;
432 server
->acdirmin
= data
->acdirmin
*HZ
;
433 server
->acdirmax
= data
->acdirmax
*HZ
;
435 /* Start lockd here, before we might error out */
436 if (!(server
->flags
& NFS_MOUNT_NONLM
))
439 server
->namelen
= data
->namlen
;
440 server
->hostname
= kmalloc(strlen(data
->hostname
) + 1, GFP_KERNEL
);
441 if (!server
->hostname
)
443 strcpy(server
->hostname
, data
->hostname
);
445 /* Check NFS protocol revision and initialize RPC op vector
446 * and file handle pool. */
448 if (server
->flags
& NFS_MOUNT_VER3
) {
449 server
->rpc_ops
= &nfs_v3_clientops
;
450 server
->caps
|= NFS_CAP_READDIRPLUS
;
452 server
->rpc_ops
= &nfs_v2_clientops
;
455 server
->rpc_ops
= &nfs_v2_clientops
;
458 /* Fill in pseudoflavor for mount version < 5 */
459 if (!(data
->flags
& NFS_MOUNT_SECFLAVOUR
))
460 data
->pseudoflavor
= RPC_AUTH_UNIX
;
461 authflavor
= data
->pseudoflavor
; /* save for sb_init() */
462 /* XXX maybe we want to add a server->pseudoflavor field */
464 /* Create RPC client handles */
465 server
->client
= nfs_create_client(server
, data
);
466 if (IS_ERR(server
->client
))
467 return PTR_ERR(server
->client
);
468 /* RFC 2623, sec 2.3.2 */
469 if (authflavor
!= RPC_AUTH_UNIX
) {
470 struct rpc_auth
*auth
;
472 server
->client_sys
= rpc_clone_client(server
->client
);
473 if (IS_ERR(server
->client_sys
))
474 return PTR_ERR(server
->client_sys
);
475 auth
= rpcauth_create(RPC_AUTH_UNIX
, server
->client_sys
);
477 return PTR_ERR(auth
);
479 atomic_inc(&server
->client
->cl_count
);
480 server
->client_sys
= server
->client
;
482 if (server
->flags
& NFS_MOUNT_VER3
) {
483 #ifdef CONFIG_NFS_V3_ACL
484 if (!(server
->flags
& NFS_MOUNT_NOACL
)) {
485 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
486 /* No errors! Assume that Sun nfsacls are supported */
487 if (!IS_ERR(server
->client_acl
))
488 server
->caps
|= NFS_CAP_ACLS
;
491 server
->flags
&= ~NFS_MOUNT_NOACL
;
492 #endif /* CONFIG_NFS_V3_ACL */
494 * The VFS shouldn't apply the umask to mode bits. We will
495 * do so ourselves when necessary.
497 sb
->s_flags
|= MS_POSIXACL
;
498 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
499 server
->namelen
= NFS3_MAXNAMLEN
;
502 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
503 server
->namelen
= NFS2_MAXNAMLEN
;
506 sb
->s_op
= &nfs_sops
;
507 return nfs_sb_init(sb
, authflavor
);
511 nfs_statfs(struct super_block
*sb
, struct kstatfs
*buf
)
513 struct nfs_server
*server
= NFS_SB(sb
);
514 unsigned char blockbits
;
515 unsigned long blockres
;
516 struct nfs_fh
*rootfh
= NFS_FH(sb
->s_root
->d_inode
);
517 struct nfs_fattr fattr
;
518 struct nfs_fsstat res
= {
525 error
= server
->rpc_ops
->statfs(server
, rootfh
, &res
);
526 buf
->f_type
= NFS_SUPER_MAGIC
;
531 * Current versions of glibc do not correctly handle the
532 * case where f_frsize != f_bsize. Eventually we want to
533 * report the value of wtmult in this field.
535 buf
->f_frsize
= sb
->s_blocksize
;
538 * On most *nix systems, f_blocks, f_bfree, and f_bavail
539 * are reported in units of f_frsize. Linux hasn't had
540 * an f_frsize field in its statfs struct until recently,
541 * thus historically Linux's sys_statfs reports these
542 * fields in units of f_bsize.
544 buf
->f_bsize
= sb
->s_blocksize
;
545 blockbits
= sb
->s_blocksize_bits
;
546 blockres
= (1 << blockbits
) - 1;
547 buf
->f_blocks
= (res
.tbytes
+ blockres
) >> blockbits
;
548 buf
->f_bfree
= (res
.fbytes
+ blockres
) >> blockbits
;
549 buf
->f_bavail
= (res
.abytes
+ blockres
) >> blockbits
;
551 buf
->f_files
= res
.tfiles
;
552 buf
->f_ffree
= res
.afiles
;
554 buf
->f_namelen
= server
->namelen
;
561 printk(KERN_WARNING
"nfs_statfs: statfs error = %d\n", -error
);
562 buf
->f_bsize
= buf
->f_blocks
= buf
->f_bfree
= buf
->f_bavail
= -1;
567 static int nfs_show_options(struct seq_file
*m
, struct vfsmount
*mnt
)
569 static struct proc_nfs_info
{
574 { NFS_MOUNT_SOFT
, ",soft", ",hard" },
575 { NFS_MOUNT_INTR
, ",intr", "" },
576 { NFS_MOUNT_POSIX
, ",posix", "" },
577 { NFS_MOUNT_TCP
, ",tcp", ",udp" },
578 { NFS_MOUNT_NOCTO
, ",nocto", "" },
579 { NFS_MOUNT_NOAC
, ",noac", "" },
580 { NFS_MOUNT_NONLM
, ",nolock", ",lock" },
581 { NFS_MOUNT_NOACL
, ",noacl", "" },
584 struct proc_nfs_info
*nfs_infop
;
585 struct nfs_server
*nfss
= NFS_SB(mnt
->mnt_sb
);
587 seq_printf(m
, ",v%d", nfss
->rpc_ops
->version
);
588 seq_printf(m
, ",rsize=%d", nfss
->rsize
);
589 seq_printf(m
, ",wsize=%d", nfss
->wsize
);
590 if (nfss
->acregmin
!= 3*HZ
)
591 seq_printf(m
, ",acregmin=%d", nfss
->acregmin
/HZ
);
592 if (nfss
->acregmax
!= 60*HZ
)
593 seq_printf(m
, ",acregmax=%d", nfss
->acregmax
/HZ
);
594 if (nfss
->acdirmin
!= 30*HZ
)
595 seq_printf(m
, ",acdirmin=%d", nfss
->acdirmin
/HZ
);
596 if (nfss
->acdirmax
!= 60*HZ
)
597 seq_printf(m
, ",acdirmax=%d", nfss
->acdirmax
/HZ
);
598 for (nfs_infop
= nfs_info
; nfs_infop
->flag
; nfs_infop
++) {
599 if (nfss
->flags
& nfs_infop
->flag
)
600 seq_puts(m
, nfs_infop
->str
);
602 seq_puts(m
, nfs_infop
->nostr
);
604 seq_puts(m
, ",addr=");
605 seq_escape(m
, nfss
->hostname
, " \t\n\\");
610 * Invalidate the local caches
613 nfs_zap_caches(struct inode
*inode
)
615 struct nfs_inode
*nfsi
= NFS_I(inode
);
616 int mode
= inode
->i_mode
;
618 NFS_ATTRTIMEO(inode
) = NFS_MINATTRTIMEO(inode
);
619 NFS_ATTRTIMEO_UPDATE(inode
) = jiffies
;
621 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
622 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
623 nfsi
->flags
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
625 nfsi
->flags
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
628 static void nfs_zap_acl_cache(struct inode
*inode
)
630 void (*clear_acl_cache
)(struct inode
*);
632 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
633 if (clear_acl_cache
!= NULL
)
634 clear_acl_cache(inode
);
635 NFS_I(inode
)->flags
&= ~NFS_INO_INVALID_ACL
;
639 * Invalidate, but do not unhash, the inode
642 nfs_invalidate_inode(struct inode
*inode
)
644 umode_t save_mode
= inode
->i_mode
;
646 make_bad_inode(inode
);
647 inode
->i_mode
= save_mode
;
648 nfs_zap_caches(inode
);
651 struct nfs_find_desc
{
653 struct nfs_fattr
*fattr
;
657 * In NFSv3 we can have 64bit inode numbers. In order to support
658 * this, and re-exported directories (also seen in NFSv2)
659 * we are forced to allow 2 different inodes to have the same
663 nfs_find_actor(struct inode
*inode
, void *opaque
)
665 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
666 struct nfs_fh
*fh
= desc
->fh
;
667 struct nfs_fattr
*fattr
= desc
->fattr
;
669 if (NFS_FILEID(inode
) != fattr
->fileid
)
671 if (nfs_compare_fh(NFS_FH(inode
), fh
))
673 if (is_bad_inode(inode
) || NFS_STALE(inode
))
679 nfs_init_locked(struct inode
*inode
, void *opaque
)
681 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
682 struct nfs_fattr
*fattr
= desc
->fattr
;
684 NFS_FILEID(inode
) = fattr
->fileid
;
685 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
689 /* Don't use READDIRPLUS on directories that we believe are too large */
690 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
693 * This is our front-end to iget that looks up inodes by file handle
694 * instead of inode number.
697 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
699 struct nfs_find_desc desc
= {
703 struct inode
*inode
= NULL
;
706 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
710 printk("NFS: Buggy server - nlink == 0!\n");
714 hash
= nfs_fattr_to_ino_t(fattr
);
716 if (!(inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
)))
719 if (inode
->i_state
& I_NEW
) {
720 struct nfs_inode
*nfsi
= NFS_I(inode
);
722 /* We set i_ino for the few things that still rely on it,
726 /* We can't support update_atime(), since the server will reset it */
727 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
728 inode
->i_mode
= fattr
->mode
;
729 /* Why so? Because we want revalidate for devices/FIFOs, and
730 * that's precisely what we have in nfs_file_inode_operations.
732 inode
->i_op
= NFS_SB(sb
)->rpc_ops
->file_inode_ops
;
733 if (S_ISREG(inode
->i_mode
)) {
734 inode
->i_fop
= &nfs_file_operations
;
735 inode
->i_data
.a_ops
= &nfs_file_aops
;
736 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
737 } else if (S_ISDIR(inode
->i_mode
)) {
738 inode
->i_op
= NFS_SB(sb
)->rpc_ops
->dir_inode_ops
;
739 inode
->i_fop
= &nfs_dir_operations
;
740 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
741 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
742 NFS_FLAGS(inode
) |= NFS_INO_ADVISE_RDPLUS
;
743 } else if (S_ISLNK(inode
->i_mode
))
744 inode
->i_op
= &nfs_symlink_inode_operations
;
746 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
748 nfsi
->read_cache_jiffies
= fattr
->timestamp
;
749 inode
->i_atime
= fattr
->atime
;
750 inode
->i_mtime
= fattr
->mtime
;
751 inode
->i_ctime
= fattr
->ctime
;
752 if (fattr
->valid
& NFS_ATTR_FATTR_V4
)
753 nfsi
->change_attr
= fattr
->change_attr
;
754 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
755 inode
->i_nlink
= fattr
->nlink
;
756 inode
->i_uid
= fattr
->uid
;
757 inode
->i_gid
= fattr
->gid
;
758 if (fattr
->valid
& (NFS_ATTR_FATTR_V3
| NFS_ATTR_FATTR_V4
)) {
760 * report the blocks in 512byte units
762 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
763 inode
->i_blksize
= inode
->i_sb
->s_blocksize
;
765 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
766 inode
->i_blksize
= fattr
->du
.nfs2
.blocksize
;
768 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
769 nfsi
->attrtimeo_timestamp
= jiffies
;
770 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
771 nfsi
->cache_access
.cred
= NULL
;
773 unlock_new_inode(inode
);
775 nfs_refresh_inode(inode
, fattr
);
776 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
778 (long long)NFS_FILEID(inode
),
779 atomic_read(&inode
->i_count
));
785 printk("nfs_fhget: iget failed\n");
789 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET)
792 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
794 struct inode
*inode
= dentry
->d_inode
;
795 struct nfs_fattr fattr
;
798 if (attr
->ia_valid
& ATTR_SIZE
) {
799 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
800 attr
->ia_valid
&= ~ATTR_SIZE
;
803 /* Optimization: if the end result is no change, don't RPC */
804 attr
->ia_valid
&= NFS_VALID_ATTRS
;
805 if (attr
->ia_valid
== 0)
809 nfs_begin_data_update(inode
);
810 /* Write all dirty data if we're changing file permissions or size */
811 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
|ATTR_SIZE
)) != 0) {
812 if (filemap_fdatawrite(inode
->i_mapping
) == 0)
813 filemap_fdatawait(inode
->i_mapping
);
816 error
= NFS_PROTO(inode
)->setattr(dentry
, &fattr
, attr
);
818 nfs_refresh_inode(inode
, &fattr
);
819 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
821 mode
= inode
->i_mode
& ~S_IALLUGO
;
822 mode
|= attr
->ia_mode
& S_IALLUGO
;
823 inode
->i_mode
= mode
;
825 if ((attr
->ia_valid
& ATTR_UID
) != 0)
826 inode
->i_uid
= attr
->ia_uid
;
827 if ((attr
->ia_valid
& ATTR_GID
) != 0)
828 inode
->i_gid
= attr
->ia_gid
;
829 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
830 inode
->i_size
= attr
->ia_size
;
831 vmtruncate(inode
, attr
->ia_size
);
834 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
835 NFS_FLAGS(inode
) |= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
836 nfs_end_data_update(inode
);
842 * Wait for the inode to get unlocked.
843 * (Used for NFS_INO_LOCKED and NFS_INO_REVALIDATING).
846 nfs_wait_on_inode(struct inode
*inode
, int flag
)
848 struct rpc_clnt
*clnt
= NFS_CLIENT(inode
);
849 struct nfs_inode
*nfsi
= NFS_I(inode
);
852 if (!(NFS_FLAGS(inode
) & flag
))
854 atomic_inc(&inode
->i_count
);
855 error
= nfs_wait_event(clnt
, nfsi
->nfs_i_wait
,
856 !(NFS_FLAGS(inode
) & flag
));
861 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
863 struct inode
*inode
= dentry
->d_inode
;
864 struct nfs_inode
*nfsi
= NFS_I(inode
);
865 int need_atime
= nfsi
->flags
& NFS_INO_INVALID_ATIME
;
868 if (__IS_FLG(inode
, MS_NOATIME
))
870 else if (__IS_FLG(inode
, MS_NODIRATIME
) && S_ISDIR(inode
->i_mode
))
872 /* We may force a getattr if the user cares about atime */
874 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
876 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
878 generic_fillattr(inode
, stat
);
882 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, struct rpc_cred
*cred
)
884 struct nfs_open_context
*ctx
;
886 ctx
= (struct nfs_open_context
*)kmalloc(sizeof(*ctx
), GFP_KERNEL
);
888 atomic_set(&ctx
->count
, 1);
889 ctx
->dentry
= dget(dentry
);
890 ctx
->cred
= get_rpccred(cred
);
892 ctx
->lockowner
= current
->files
;
899 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
902 atomic_inc(&ctx
->count
);
906 void put_nfs_open_context(struct nfs_open_context
*ctx
)
908 if (atomic_dec_and_test(&ctx
->count
)) {
909 if (!list_empty(&ctx
->list
)) {
910 struct inode
*inode
= ctx
->dentry
->d_inode
;
911 spin_lock(&inode
->i_lock
);
912 list_del(&ctx
->list
);
913 spin_unlock(&inode
->i_lock
);
915 if (ctx
->state
!= NULL
)
916 nfs4_close_state(ctx
->state
, ctx
->mode
);
917 if (ctx
->cred
!= NULL
)
918 put_rpccred(ctx
->cred
);
925 * Ensure that mmap has a recent RPC credential for use when writing out
928 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
930 struct inode
*inode
= filp
->f_dentry
->d_inode
;
931 struct nfs_inode
*nfsi
= NFS_I(inode
);
933 filp
->private_data
= get_nfs_open_context(ctx
);
934 spin_lock(&inode
->i_lock
);
935 list_add(&ctx
->list
, &nfsi
->open_files
);
936 spin_unlock(&inode
->i_lock
);
939 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, int mode
)
941 struct nfs_inode
*nfsi
= NFS_I(inode
);
942 struct nfs_open_context
*pos
, *ctx
= NULL
;
944 spin_lock(&inode
->i_lock
);
945 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
946 if ((pos
->mode
& mode
) == mode
) {
947 ctx
= get_nfs_open_context(pos
);
951 spin_unlock(&inode
->i_lock
);
955 void nfs_file_clear_open_context(struct file
*filp
)
957 struct inode
*inode
= filp
->f_dentry
->d_inode
;
958 struct nfs_open_context
*ctx
= (struct nfs_open_context
*)filp
->private_data
;
961 filp
->private_data
= NULL
;
962 spin_lock(&inode
->i_lock
);
963 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
964 spin_unlock(&inode
->i_lock
);
965 put_nfs_open_context(ctx
);
970 * These allocate and release file read/write context information.
972 int nfs_open(struct inode
*inode
, struct file
*filp
)
974 struct nfs_open_context
*ctx
;
975 struct rpc_cred
*cred
;
977 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
979 return PTR_ERR(cred
);
980 ctx
= alloc_nfs_open_context(filp
->f_dentry
, cred
);
984 ctx
->mode
= filp
->f_mode
;
985 nfs_file_set_open_context(filp
, ctx
);
986 put_nfs_open_context(ctx
);
987 if ((filp
->f_mode
& FMODE_WRITE
) != 0)
988 nfs_begin_data_update(inode
);
992 int nfs_release(struct inode
*inode
, struct file
*filp
)
994 if ((filp
->f_mode
& FMODE_WRITE
) != 0)
995 nfs_end_data_update(inode
);
996 nfs_file_clear_open_context(filp
);
1001 * This function is called whenever some part of NFS notices that
1002 * the cached attributes have to be refreshed.
1005 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1007 int status
= -ESTALE
;
1008 struct nfs_fattr fattr
;
1009 struct nfs_inode
*nfsi
= NFS_I(inode
);
1010 unsigned long verifier
;
1013 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
1014 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
1017 if (!inode
|| is_bad_inode(inode
))
1019 if (NFS_STALE(inode
))
1022 while (NFS_REVALIDATING(inode
)) {
1023 status
= nfs_wait_on_inode(inode
, NFS_INO_REVALIDATING
);
1026 if (NFS_ATTRTIMEO(inode
) == 0)
1028 if (NFS_FLAGS(inode
) & (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ATIME
))
1030 status
= NFS_STALE(inode
) ? -ESTALE
: 0;
1033 NFS_FLAGS(inode
) |= NFS_INO_REVALIDATING
;
1035 /* Protect against RPC races by saving the change attribute */
1036 verifier
= nfs_save_change_attribute(inode
);
1037 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), &fattr
);
1039 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
1041 (long long)NFS_FILEID(inode
), status
);
1042 if (status
== -ESTALE
) {
1043 nfs_zap_caches(inode
);
1044 if (!S_ISDIR(inode
->i_mode
))
1045 NFS_FLAGS(inode
) |= NFS_INO_STALE
;
1050 status
= nfs_update_inode(inode
, &fattr
, verifier
);
1052 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
1054 (long long)NFS_FILEID(inode
), status
);
1057 flags
= nfsi
->flags
;
1058 nfsi
->flags
&= ~NFS_INO_REVAL_PAGECACHE
;
1060 * We may need to keep the attributes marked as invalid if
1061 * we raced with nfs_end_attr_update().
1063 if (verifier
== nfsi
->cache_change_attribute
)
1064 nfsi
->flags
&= ~(NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ATIME
);
1065 /* Do the page cache invalidation */
1066 nfs_revalidate_mapping(inode
, inode
->i_mapping
);
1067 if (flags
& NFS_INO_INVALID_ACL
)
1068 nfs_zap_acl_cache(inode
);
1069 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
1071 (long long)NFS_FILEID(inode
));
1074 NFS_FLAGS(inode
) &= ~NFS_INO_REVALIDATING
;
1075 wake_up(&nfsi
->nfs_i_wait
);
1081 int nfs_attribute_timeout(struct inode
*inode
)
1083 struct nfs_inode
*nfsi
= NFS_I(inode
);
1085 if (nfs_have_delegation(inode
, FMODE_READ
))
1087 return time_after(jiffies
, nfsi
->read_cache_jiffies
+nfsi
->attrtimeo
);
1091 * nfs_revalidate_inode - Revalidate the inode attributes
1092 * @server - pointer to nfs_server struct
1093 * @inode - pointer to inode struct
1095 * Updates inode attribute information by retrieving the data from the server.
1097 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1099 if (!(NFS_FLAGS(inode
) & (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
))
1100 && !nfs_attribute_timeout(inode
))
1101 return NFS_STALE(inode
) ? -ESTALE
: 0;
1102 return __nfs_revalidate_inode(server
, inode
);
1106 * nfs_revalidate_mapping - Revalidate the pagecache
1107 * @inode - pointer to host inode
1108 * @mapping - pointer to mapping
1110 void nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1112 struct nfs_inode
*nfsi
= NFS_I(inode
);
1114 if (nfsi
->flags
& NFS_INO_INVALID_DATA
) {
1115 if (S_ISREG(inode
->i_mode
)) {
1116 if (filemap_fdatawrite(mapping
) == 0)
1117 filemap_fdatawait(mapping
);
1120 invalidate_inode_pages2(mapping
);
1121 nfsi
->flags
&= ~NFS_INO_INVALID_DATA
;
1122 if (S_ISDIR(inode
->i_mode
)) {
1123 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1124 /* This ensures we revalidate child dentries */
1125 nfsi
->cache_change_attribute
++;
1127 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
1129 (long long)NFS_FILEID(inode
));
1134 * nfs_begin_data_update
1135 * @inode - pointer to inode
1136 * Declare that a set of operations will update file data on the server
1138 void nfs_begin_data_update(struct inode
*inode
)
1140 atomic_inc(&NFS_I(inode
)->data_updates
);
1144 * nfs_end_data_update
1145 * @inode - pointer to inode
1146 * Declare end of the operations that will update file data
1147 * This will mark the inode as immediately needing revalidation
1148 * of its attribute cache.
1150 void nfs_end_data_update(struct inode
*inode
)
1152 struct nfs_inode
*nfsi
= NFS_I(inode
);
1154 if (!nfs_have_delegation(inode
, FMODE_READ
)) {
1155 /* Mark the attribute cache for revalidation */
1156 nfsi
->flags
|= NFS_INO_INVALID_ATTR
;
1157 /* Directories and symlinks: invalidate page cache too */
1158 if (S_ISDIR(inode
->i_mode
) || S_ISLNK(inode
->i_mode
))
1159 nfsi
->flags
|= NFS_INO_INVALID_DATA
;
1161 nfsi
->cache_change_attribute
++;
1162 atomic_dec(&nfsi
->data_updates
);
1166 * nfs_refresh_inode - verify consistency of the inode attribute cache
1167 * @inode - pointer to inode
1168 * @fattr - updated attributes
1170 * Verifies the attribute cache. If we have just changed the attributes,
1171 * so that fattr carries weak cache consistency data, then it may
1172 * also update the ctime/mtime/change_attribute.
1174 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1176 struct nfs_inode
*nfsi
= NFS_I(inode
);
1177 loff_t cur_size
, new_isize
;
1180 /* Do we hold a delegation? */
1181 if (nfs_have_delegation(inode
, FMODE_READ
))
1184 /* Are we in the process of updating data on the server? */
1185 data_unstable
= nfs_caches_unstable(inode
);
1187 if (fattr
->valid
& NFS_ATTR_FATTR_V4
) {
1188 if ((fattr
->valid
& NFS_ATTR_PRE_CHANGE
) != 0
1189 && nfsi
->change_attr
== fattr
->pre_change_attr
)
1190 nfsi
->change_attr
= fattr
->change_attr
;
1191 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1192 nfsi
->flags
|= NFS_INO_INVALID_ATTR
;
1194 nfsi
->flags
|= NFS_INO_REVAL_PAGECACHE
;
1198 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1201 /* Has the inode gone and changed behind our back? */
1202 if (nfsi
->fileid
!= fattr
->fileid
1203 || (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1206 cur_size
= i_size_read(inode
);
1207 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1209 /* If we have atomic WCC data, we may update some attributes */
1210 if ((fattr
->valid
& NFS_ATTR_WCC
) != 0) {
1211 if (timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
))
1212 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1213 if (timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
))
1214 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1217 /* Verify a few of the more important attributes */
1218 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1219 nfsi
->flags
|= NFS_INO_INVALID_ATTR
;
1221 nfsi
->flags
|= NFS_INO_REVAL_PAGECACHE
;
1223 if (cur_size
!= new_isize
) {
1224 nfsi
->flags
|= NFS_INO_INVALID_ATTR
;
1225 if (nfsi
->npages
== 0)
1226 nfsi
->flags
|= NFS_INO_REVAL_PAGECACHE
;
1229 /* Have any file permissions changed? */
1230 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)
1231 || inode
->i_uid
!= fattr
->uid
1232 || inode
->i_gid
!= fattr
->gid
)
1233 nfsi
->flags
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1235 /* Has the link count changed? */
1236 if (inode
->i_nlink
!= fattr
->nlink
)
1237 nfsi
->flags
|= NFS_INO_INVALID_ATTR
;
1239 if (!timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1240 nfsi
->flags
|= NFS_INO_INVALID_ATIME
;
1242 nfsi
->read_cache_jiffies
= fattr
->timestamp
;
1247 * Many nfs protocol calls return the new file attributes after
1248 * an operation. Here we update the inode to reflect the state
1249 * of the server's inode.
1251 * This is a bit tricky because we have to make sure all dirty pages
1252 * have been sent off to the server before calling invalidate_inode_pages.
1253 * To make sure no other process adds more write requests while we try
1254 * our best to flush them, we make them sleep during the attribute refresh.
1256 * A very similar scenario holds for the dir cache.
1258 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
, unsigned long verifier
)
1260 struct nfs_inode
*nfsi
= NFS_I(inode
);
1261 loff_t cur_isize
, new_isize
;
1262 unsigned int invalid
= 0;
1265 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1266 __FUNCTION__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1267 atomic_read(&inode
->i_count
), fattr
->valid
);
1269 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1272 if (nfsi
->fileid
!= fattr
->fileid
) {
1273 printk(KERN_ERR
"%s: inode number mismatch\n"
1274 "expected (%s/0x%Lx), got (%s/0x%Lx)\n",
1276 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1277 inode
->i_sb
->s_id
, (long long)fattr
->fileid
);
1282 * Make sure the inode's type hasn't changed.
1284 if ((inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1288 * Update the read time so we don't revalidate too often.
1290 nfsi
->read_cache_jiffies
= fattr
->timestamp
;
1292 /* Are we racing with known updates of the metadata on the server? */
1293 data_unstable
= ! nfs_verify_change_attribute(inode
, verifier
);
1295 /* Check if our cached file size is stale */
1296 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1297 cur_isize
= i_size_read(inode
);
1298 if (new_isize
!= cur_isize
) {
1299 /* Do we perhaps have any outstanding writes? */
1300 if (nfsi
->npages
== 0) {
1301 /* No, but did we race with nfs_end_data_update()? */
1302 if (verifier
== nfsi
->cache_change_attribute
) {
1303 inode
->i_size
= new_isize
;
1304 invalid
|= NFS_INO_INVALID_DATA
;
1306 invalid
|= NFS_INO_INVALID_ATTR
;
1307 } else if (new_isize
> cur_isize
) {
1308 inode
->i_size
= new_isize
;
1309 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1311 dprintk("NFS: isize change on server for file %s/%ld\n",
1312 inode
->i_sb
->s_id
, inode
->i_ino
);
1315 /* Check if the mtime agrees */
1316 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1317 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1318 dprintk("NFS: mtime change on server for file %s/%ld\n",
1319 inode
->i_sb
->s_id
, inode
->i_ino
);
1321 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1324 if ((fattr
->valid
& NFS_ATTR_FATTR_V4
)
1325 && nfsi
->change_attr
!= fattr
->change_attr
) {
1326 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1327 inode
->i_sb
->s_id
, inode
->i_ino
);
1328 nfsi
->change_attr
= fattr
->change_attr
;
1330 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1333 /* If ctime has changed we should definitely clear access+acl caches */
1334 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1336 invalid
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1337 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1339 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1341 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
) ||
1342 inode
->i_uid
!= fattr
->uid
||
1343 inode
->i_gid
!= fattr
->gid
)
1344 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1346 inode
->i_mode
= fattr
->mode
;
1347 inode
->i_nlink
= fattr
->nlink
;
1348 inode
->i_uid
= fattr
->uid
;
1349 inode
->i_gid
= fattr
->gid
;
1351 if (fattr
->valid
& (NFS_ATTR_FATTR_V3
| NFS_ATTR_FATTR_V4
)) {
1353 * report the blocks in 512byte units
1355 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1356 inode
->i_blksize
= inode
->i_sb
->s_blocksize
;
1358 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1359 inode
->i_blksize
= fattr
->du
.nfs2
.blocksize
;
1362 /* Update attrtimeo value if we're out of the unstable period */
1363 if (invalid
& NFS_INO_INVALID_ATTR
) {
1364 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1365 nfsi
->attrtimeo_timestamp
= jiffies
;
1366 } else if (time_after(jiffies
, nfsi
->attrtimeo_timestamp
+nfsi
->attrtimeo
)) {
1367 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1368 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1369 nfsi
->attrtimeo_timestamp
= jiffies
;
1371 /* Don't invalidate the data if we were to blame */
1372 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1373 || S_ISLNK(inode
->i_mode
)))
1374 invalid
&= ~NFS_INO_INVALID_DATA
;
1375 if (!nfs_have_delegation(inode
, FMODE_READ
))
1376 nfsi
->flags
|= invalid
;
1381 * Big trouble! The inode has become a different object.
1384 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1385 __FUNCTION__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1388 * No need to worry about unhashing the dentry, as the
1389 * lookup validation will know that the inode is bad.
1390 * (But we fall through to invalidate the caches.)
1392 nfs_invalidate_inode(inode
);
1394 NFS_FLAGS(inode
) |= NFS_INO_STALE
;
1399 * File system information
1402 static int nfs_set_super(struct super_block
*s
, void *data
)
1404 s
->s_fs_info
= data
;
1405 return set_anon_super(s
, data
);
1408 static int nfs_compare_super(struct super_block
*sb
, void *data
)
1410 struct nfs_server
*server
= data
;
1411 struct nfs_server
*old
= NFS_SB(sb
);
1413 if (old
->addr
.sin_addr
.s_addr
!= server
->addr
.sin_addr
.s_addr
)
1415 if (old
->addr
.sin_port
!= server
->addr
.sin_port
)
1417 return !nfs_compare_fh(&old
->fh
, &server
->fh
);
1420 static struct super_block
*nfs_get_sb(struct file_system_type
*fs_type
,
1421 int flags
, const char *dev_name
, void *raw_data
)
1424 struct nfs_server
*server
= NULL
;
1425 struct super_block
*s
;
1426 struct nfs_fh
*root
;
1427 struct nfs_mount_data
*data
= raw_data
;
1429 s
= ERR_PTR(-EINVAL
);
1431 dprintk("%s: missing data argument\n", __FUNCTION__
);
1434 if (data
->version
<= 0 || data
->version
> NFS_MOUNT_VERSION
) {
1435 dprintk("%s: bad mount version\n", __FUNCTION__
);
1438 switch (data
->version
) {
1444 if (data
->flags
& NFS_MOUNT_VER3
) {
1445 dprintk("%s: mount structure version %d does not support NFSv3\n",
1450 data
->root
.size
= NFS2_FHSIZE
;
1451 memcpy(data
->root
.data
, data
->old_root
.data
, NFS2_FHSIZE
);
1453 if (data
->flags
& NFS_MOUNT_SECFLAVOUR
) {
1454 dprintk("%s: mount structure version %d does not support strong security\n",
1460 memset(data
->context
, 0, sizeof(data
->context
));
1462 #ifndef CONFIG_NFS_V3
1463 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1464 s
= ERR_PTR(-EPROTONOSUPPORT
);
1465 if (data
->flags
& NFS_MOUNT_VER3
) {
1466 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__
);
1469 #endif /* CONFIG_NFS_V3 */
1471 s
= ERR_PTR(-ENOMEM
);
1472 server
= kmalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1475 memset(server
, 0, sizeof(struct nfs_server
));
1476 /* Zero out the NFS state stuff */
1477 init_nfsv4_state(server
);
1478 server
->client
= server
->client_sys
= server
->client_acl
= ERR_PTR(-EINVAL
);
1481 if (data
->flags
& NFS_MOUNT_VER3
)
1482 root
->size
= data
->root
.size
;
1484 root
->size
= NFS2_FHSIZE
;
1485 s
= ERR_PTR(-EINVAL
);
1486 if (root
->size
> sizeof(root
->data
)) {
1487 dprintk("%s: invalid root filehandle\n", __FUNCTION__
);
1490 memcpy(root
->data
, data
->root
.data
, root
->size
);
1492 /* We now require that the mount process passes the remote address */
1493 memcpy(&server
->addr
, &data
->addr
, sizeof(server
->addr
));
1494 if (server
->addr
.sin_addr
.s_addr
== INADDR_ANY
) {
1495 dprintk("%s: mount program didn't pass remote address!\n",
1500 /* Fire up rpciod if not yet running */
1501 s
= ERR_PTR(rpciod_up());
1503 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1504 __FUNCTION__
, PTR_ERR(s
));
1508 s
= sget(fs_type
, nfs_compare_super
, nfs_set_super
, server
);
1509 if (IS_ERR(s
) || s
->s_root
)
1510 goto out_rpciod_down
;
1514 error
= nfs_fill_super(s
, data
, flags
& MS_VERBOSE
? 1 : 0);
1516 up_write(&s
->s_umount
);
1517 deactivate_super(s
);
1518 return ERR_PTR(error
);
1520 s
->s_flags
|= MS_ACTIVE
;
1529 static void nfs_kill_super(struct super_block
*s
)
1531 struct nfs_server
*server
= NFS_SB(s
);
1535 if (!IS_ERR(server
->client
))
1536 rpc_shutdown_client(server
->client
);
1537 if (!IS_ERR(server
->client_sys
))
1538 rpc_shutdown_client(server
->client_sys
);
1539 if (!IS_ERR(server
->client_acl
))
1540 rpc_shutdown_client(server
->client_acl
);
1542 if (!(server
->flags
& NFS_MOUNT_NONLM
))
1543 lockd_down(); /* release rpc.lockd */
1545 rpciod_down(); /* release rpciod */
1547 if (server
->hostname
!= NULL
)
1548 kfree(server
->hostname
);
1552 static struct file_system_type nfs_fs_type
= {
1553 .owner
= THIS_MODULE
,
1555 .get_sb
= nfs_get_sb
,
1556 .kill_sb
= nfs_kill_super
,
1557 .fs_flags
= FS_ODD_RENAME
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
1560 #ifdef CONFIG_NFS_V4
1562 static void nfs4_clear_inode(struct inode
*);
1565 static struct super_operations nfs4_sops
= {
1566 .alloc_inode
= nfs_alloc_inode
,
1567 .destroy_inode
= nfs_destroy_inode
,
1568 .write_inode
= nfs_write_inode
,
1569 .delete_inode
= nfs_delete_inode
,
1570 .statfs
= nfs_statfs
,
1571 .clear_inode
= nfs4_clear_inode
,
1572 .umount_begin
= nfs_umount_begin
,
1573 .show_options
= nfs_show_options
,
1577 * Clean out any remaining NFSv4 state that might be left over due
1578 * to open() calls that passed nfs_atomic_lookup, but failed to call
1581 static void nfs4_clear_inode(struct inode
*inode
)
1583 struct nfs_inode
*nfsi
= NFS_I(inode
);
1585 /* If we are holding a delegation, return it! */
1586 if (nfsi
->delegation
!= NULL
)
1587 nfs_inode_return_delegation(inode
);
1588 /* First call standard NFS clear_inode() code */
1589 nfs_clear_inode(inode
);
1590 /* Now clear out any remaining state */
1591 while (!list_empty(&nfsi
->open_states
)) {
1592 struct nfs4_state
*state
;
1594 state
= list_entry(nfsi
->open_states
.next
,
1597 dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
1600 (long long)NFS_FILEID(inode
),
1602 BUG_ON(atomic_read(&state
->count
) != 1);
1603 nfs4_close_state(state
, state
->state
);
1608 static int nfs4_fill_super(struct super_block
*sb
, struct nfs4_mount_data
*data
, int silent
)
1610 struct nfs_server
*server
;
1611 struct nfs4_client
*clp
= NULL
;
1612 struct rpc_xprt
*xprt
= NULL
;
1613 struct rpc_clnt
*clnt
= NULL
;
1614 struct rpc_timeout timeparms
;
1615 rpc_authflavor_t authflavour
;
1616 int proto
, err
= -EIO
;
1618 sb
->s_blocksize_bits
= 0;
1619 sb
->s_blocksize
= 0;
1620 server
= NFS_SB(sb
);
1621 if (data
->rsize
!= 0)
1622 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1623 if (data
->wsize
!= 0)
1624 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1625 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
1626 server
->caps
= NFS_CAP_ATOMIC_OPEN
;
1628 server
->acregmin
= data
->acregmin
*HZ
;
1629 server
->acregmax
= data
->acregmax
*HZ
;
1630 server
->acdirmin
= data
->acdirmin
*HZ
;
1631 server
->acdirmax
= data
->acdirmax
*HZ
;
1633 server
->rpc_ops
= &nfs_v4_clientops
;
1634 /* Initialize timeout values */
1636 timeparms
.to_initval
= data
->timeo
* HZ
/ 10;
1637 timeparms
.to_retries
= data
->retrans
;
1638 timeparms
.to_exponential
= 1;
1639 if (!timeparms
.to_retries
)
1640 timeparms
.to_retries
= 5;
1642 proto
= data
->proto
;
1643 /* Which IP protocol do we use? */
1646 timeparms
.to_maxval
= RPC_MAX_TCP_TIMEOUT
;
1647 if (!timeparms
.to_initval
)
1648 timeparms
.to_initval
= 600 * HZ
/ 10;
1651 timeparms
.to_maxval
= RPC_MAX_UDP_TIMEOUT
;
1652 if (!timeparms
.to_initval
)
1653 timeparms
.to_initval
= 11 * HZ
/ 10;
1659 clp
= nfs4_get_client(&server
->addr
.sin_addr
);
1661 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__
);
1665 /* Now create transport and client */
1666 authflavour
= RPC_AUTH_UNIX
;
1667 if (data
->auth_flavourlen
!= 0) {
1668 if (data
->auth_flavourlen
!= 1) {
1669 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1670 __FUNCTION__
, data
->auth_flavourlen
);
1674 if (copy_from_user(&authflavour
, data
->auth_flavours
, sizeof(authflavour
))) {
1680 down_write(&clp
->cl_sem
);
1681 if (IS_ERR(clp
->cl_rpcclient
)) {
1682 xprt
= xprt_create_proto(proto
, &server
->addr
, &timeparms
);
1684 up_write(&clp
->cl_sem
);
1685 err
= PTR_ERR(xprt
);
1686 dprintk("%s: cannot create RPC transport. Error = %d\n",
1690 clnt
= rpc_create_client(xprt
, server
->hostname
, &nfs_program
,
1691 server
->rpc_ops
->version
, authflavour
);
1693 up_write(&clp
->cl_sem
);
1694 err
= PTR_ERR(clnt
);
1695 dprintk("%s: cannot create RPC client. Error = %d\n",
1700 clnt
->cl_softrtry
= 1;
1701 clnt
->cl_chatty
= 1;
1702 clp
->cl_rpcclient
= clnt
;
1703 clp
->cl_cred
= rpcauth_lookupcred(clnt
->cl_auth
, 0);
1704 if (IS_ERR(clp
->cl_cred
)) {
1705 up_write(&clp
->cl_sem
);
1706 err
= PTR_ERR(clp
->cl_cred
);
1707 clp
->cl_cred
= NULL
;
1710 memcpy(clp
->cl_ipaddr
, server
->ip_addr
, sizeof(clp
->cl_ipaddr
));
1713 if (list_empty(&clp
->cl_superblocks
)) {
1714 err
= nfs4_init_client(clp
);
1716 up_write(&clp
->cl_sem
);
1720 list_add_tail(&server
->nfs4_siblings
, &clp
->cl_superblocks
);
1721 clnt
= rpc_clone_client(clp
->cl_rpcclient
);
1723 server
->nfs4_state
= clp
;
1724 up_write(&clp
->cl_sem
);
1728 err
= PTR_ERR(clnt
);
1729 dprintk("%s: cannot create RPC client. Error = %d\n",
1734 server
->client
= clnt
;
1736 if (server
->nfs4_state
->cl_idmap
== NULL
) {
1737 dprintk("%s: failed to create idmapper.\n", __FUNCTION__
);
1741 if (clnt
->cl_auth
->au_flavor
!= authflavour
) {
1742 struct rpc_auth
*auth
;
1744 auth
= rpcauth_create(authflavour
, clnt
);
1746 dprintk("%s: couldn't create credcache!\n", __FUNCTION__
);
1747 return PTR_ERR(auth
);
1751 sb
->s_time_gran
= 1;
1753 sb
->s_op
= &nfs4_sops
;
1754 err
= nfs_sb_init(sb
, authflavour
);
1759 nfs4_put_client(clp
);
1763 static int nfs4_compare_super(struct super_block
*sb
, void *data
)
1765 struct nfs_server
*server
= data
;
1766 struct nfs_server
*old
= NFS_SB(sb
);
1768 if (strcmp(server
->hostname
, old
->hostname
) != 0)
1770 if (strcmp(server
->mnt_path
, old
->mnt_path
) != 0)
1776 nfs_copy_user_string(char *dst
, struct nfs_string
*src
, int maxlen
)
1781 return ERR_PTR(-EINVAL
);
1782 if (src
->len
< maxlen
)
1785 p
= dst
= kmalloc(maxlen
+ 1, GFP_KERNEL
);
1787 return ERR_PTR(-ENOMEM
);
1789 if (copy_from_user(dst
, src
->data
, maxlen
)) {
1792 return ERR_PTR(-EFAULT
);
1798 static struct super_block
*nfs4_get_sb(struct file_system_type
*fs_type
,
1799 int flags
, const char *dev_name
, void *raw_data
)
1802 struct nfs_server
*server
;
1803 struct super_block
*s
;
1804 struct nfs4_mount_data
*data
= raw_data
;
1808 dprintk("%s: missing data argument\n", __FUNCTION__
);
1809 return ERR_PTR(-EINVAL
);
1811 if (data
->version
<= 0 || data
->version
> NFS4_MOUNT_VERSION
) {
1812 dprintk("%s: bad mount version\n", __FUNCTION__
);
1813 return ERR_PTR(-EINVAL
);
1816 server
= kmalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1818 return ERR_PTR(-ENOMEM
);
1819 memset(server
, 0, sizeof(struct nfs_server
));
1820 /* Zero out the NFS state stuff */
1821 init_nfsv4_state(server
);
1822 server
->client
= server
->client_sys
= server
->client_acl
= ERR_PTR(-EINVAL
);
1824 p
= nfs_copy_user_string(NULL
, &data
->hostname
, 256);
1827 server
->hostname
= p
;
1829 p
= nfs_copy_user_string(NULL
, &data
->mnt_path
, 1024);
1832 server
->mnt_path
= p
;
1834 p
= nfs_copy_user_string(server
->ip_addr
, &data
->client_addr
,
1835 sizeof(server
->ip_addr
) - 1);
1839 /* We now require that the mount process passes the remote address */
1840 if (data
->host_addrlen
!= sizeof(server
->addr
)) {
1841 s
= ERR_PTR(-EINVAL
);
1844 if (copy_from_user(&server
->addr
, data
->host_addr
, sizeof(server
->addr
))) {
1845 s
= ERR_PTR(-EFAULT
);
1848 if (server
->addr
.sin_family
!= AF_INET
||
1849 server
->addr
.sin_addr
.s_addr
== INADDR_ANY
) {
1850 dprintk("%s: mount program didn't pass remote IP address!\n",
1852 s
= ERR_PTR(-EINVAL
);
1856 /* Fire up rpciod if not yet running */
1857 s
= ERR_PTR(rpciod_up());
1859 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1860 __FUNCTION__
, PTR_ERR(s
));
1864 s
= sget(fs_type
, nfs4_compare_super
, nfs_set_super
, server
);
1866 if (IS_ERR(s
) || s
->s_root
)
1871 error
= nfs4_fill_super(s
, data
, flags
& MS_VERBOSE
? 1 : 0);
1873 up_write(&s
->s_umount
);
1874 deactivate_super(s
);
1875 return ERR_PTR(error
);
1877 s
->s_flags
|= MS_ACTIVE
;
1880 s
= (struct super_block
*)p
;
1882 if (server
->mnt_path
)
1883 kfree(server
->mnt_path
);
1884 if (server
->hostname
)
1885 kfree(server
->hostname
);
1890 static void nfs4_kill_super(struct super_block
*sb
)
1892 struct nfs_server
*server
= NFS_SB(sb
);
1894 nfs_return_all_delegations(sb
);
1895 kill_anon_super(sb
);
1897 nfs4_renewd_prepare_shutdown(server
);
1899 if (server
->client
!= NULL
&& !IS_ERR(server
->client
))
1900 rpc_shutdown_client(server
->client
);
1901 rpciod_down(); /* release rpciod */
1903 destroy_nfsv4_state(server
);
1905 if (server
->hostname
!= NULL
)
1906 kfree(server
->hostname
);
1910 static struct file_system_type nfs4_fs_type
= {
1911 .owner
= THIS_MODULE
,
1913 .get_sb
= nfs4_get_sb
,
1914 .kill_sb
= nfs4_kill_super
,
1915 .fs_flags
= FS_ODD_RENAME
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
1918 #define nfs4_init_once(nfsi) \
1920 INIT_LIST_HEAD(&(nfsi)->open_states); \
1921 nfsi->delegation = NULL; \
1922 nfsi->delegation_state = 0; \
1923 init_rwsem(&nfsi->rwsem); \
1925 #define register_nfs4fs() register_filesystem(&nfs4_fs_type)
1926 #define unregister_nfs4fs() unregister_filesystem(&nfs4_fs_type)
1928 #define nfs4_init_once(nfsi) \
1930 #define register_nfs4fs() (0)
1931 #define unregister_nfs4fs()
1934 extern int nfs_init_nfspagecache(void);
1935 extern void nfs_destroy_nfspagecache(void);
1936 extern int nfs_init_readpagecache(void);
1937 extern void nfs_destroy_readpagecache(void);
1938 extern int nfs_init_writepagecache(void);
1939 extern void nfs_destroy_writepagecache(void);
1940 #ifdef CONFIG_NFS_DIRECTIO
1941 extern int nfs_init_directcache(void);
1942 extern void nfs_destroy_directcache(void);
1945 static kmem_cache_t
* nfs_inode_cachep
;
1947 static struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1949 struct nfs_inode
*nfsi
;
1950 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, SLAB_KERNEL
);
1954 #ifdef CONFIG_NFS_V3_ACL
1955 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
1956 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
1958 #ifdef CONFIG_NFS_V4
1959 nfsi
->nfs4_acl
= NULL
;
1960 #endif /* CONFIG_NFS_V4 */
1961 return &nfsi
->vfs_inode
;
1964 static void nfs_destroy_inode(struct inode
*inode
)
1966 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1969 static void init_once(void * foo
, kmem_cache_t
* cachep
, unsigned long flags
)
1971 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1973 if ((flags
& (SLAB_CTOR_VERIFY
|SLAB_CTOR_CONSTRUCTOR
)) ==
1974 SLAB_CTOR_CONSTRUCTOR
) {
1975 inode_init_once(&nfsi
->vfs_inode
);
1976 spin_lock_init(&nfsi
->req_lock
);
1977 INIT_LIST_HEAD(&nfsi
->dirty
);
1978 INIT_LIST_HEAD(&nfsi
->commit
);
1979 INIT_LIST_HEAD(&nfsi
->open_files
);
1980 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
1981 atomic_set(&nfsi
->data_updates
, 0);
1985 init_waitqueue_head(&nfsi
->nfs_i_wait
);
1986 nfs4_init_once(nfsi
);
1990 static int nfs_init_inodecache(void)
1992 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1993 sizeof(struct nfs_inode
),
1994 0, SLAB_RECLAIM_ACCOUNT
,
1996 if (nfs_inode_cachep
== NULL
)
2002 static void nfs_destroy_inodecache(void)
2004 if (kmem_cache_destroy(nfs_inode_cachep
))
2005 printk(KERN_INFO
"nfs_inode_cache: not all structures were freed\n");
2011 static int __init
init_nfs_fs(void)
2015 err
= nfs_init_nfspagecache();
2019 err
= nfs_init_inodecache();
2023 err
= nfs_init_readpagecache();
2027 err
= nfs_init_writepagecache();
2031 #ifdef CONFIG_NFS_DIRECTIO
2032 err
= nfs_init_directcache();
2037 #ifdef CONFIG_PROC_FS
2038 rpc_proc_register(&nfs_rpcstat
);
2040 err
= register_filesystem(&nfs_fs_type
);
2043 if ((err
= register_nfs4fs()) != 0)
2047 #ifdef CONFIG_PROC_FS
2048 rpc_proc_unregister("nfs");
2050 nfs_destroy_writepagecache();
2051 #ifdef CONFIG_NFS_DIRECTIO
2053 nfs_destroy_directcache();
2056 nfs_destroy_readpagecache();
2058 nfs_destroy_inodecache();
2060 nfs_destroy_nfspagecache();
2065 static void __exit
exit_nfs_fs(void)
2067 #ifdef CONFIG_NFS_DIRECTIO
2068 nfs_destroy_directcache();
2070 nfs_destroy_writepagecache();
2071 nfs_destroy_readpagecache();
2072 nfs_destroy_inodecache();
2073 nfs_destroy_nfspagecache();
2074 #ifdef CONFIG_PROC_FS
2075 rpc_proc_unregister("nfs");
2077 unregister_filesystem(&nfs_fs_type
);
2078 unregister_nfs4fs();
2081 /* Not quite true; I just maintain it */
2082 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2083 MODULE_LICENSE("GPL");
2085 module_init(init_nfs_fs
)
2086 module_exit(exit_nfs_fs
)