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
);
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
)
225 bsize
= NFS_DEF_FILE_IO_BUFFER_SIZE
;
226 else if (bsize
>= NFS_MAX_FILE_IO_BUFFER_SIZE
)
227 bsize
= NFS_MAX_FILE_IO_BUFFER_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
->wsize
> max_rpc_payload
)
311 server
->wsize
= max_rpc_payload
;
313 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
314 if (server
->rpages
> NFS_READ_MAXIOV
) {
315 server
->rpages
= NFS_READ_MAXIOV
;
316 server
->rsize
= server
->rpages
<< PAGE_CACHE_SHIFT
;
319 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
320 if (server
->wpages
> NFS_WRITE_MAXIOV
) {
321 server
->wpages
= NFS_WRITE_MAXIOV
;
322 server
->wsize
= server
->wpages
<< PAGE_CACHE_SHIFT
;
325 if (sb
->s_blocksize
== 0)
326 sb
->s_blocksize
= nfs_block_bits(server
->wsize
,
327 &sb
->s_blocksize_bits
);
328 server
->wtmult
= nfs_block_bits(fsinfo
.wtmult
, NULL
);
330 server
->dtsize
= nfs_block_size(fsinfo
.dtpref
, NULL
);
331 if (server
->dtsize
> PAGE_CACHE_SIZE
)
332 server
->dtsize
= PAGE_CACHE_SIZE
;
333 if (server
->dtsize
> server
->rsize
)
334 server
->dtsize
= server
->rsize
;
336 if (server
->flags
& NFS_MOUNT_NOAC
) {
337 server
->acregmin
= server
->acregmax
= 0;
338 server
->acdirmin
= server
->acdirmax
= 0;
339 sb
->s_flags
|= MS_SYNCHRONOUS
;
341 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
343 sb
->s_maxbytes
= fsinfo
.maxfilesize
;
344 if (sb
->s_maxbytes
> MAX_LFS_FILESIZE
)
345 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
347 server
->client
->cl_intr
= (server
->flags
& NFS_MOUNT_INTR
) ? 1 : 0;
348 server
->client
->cl_softrtry
= (server
->flags
& NFS_MOUNT_SOFT
) ? 1 : 0;
350 /* We're airborne Set socket buffersize */
351 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
353 /* Yargs. It didn't work out. */
355 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error
);
356 if (!IS_ERR(root_inode
))
358 return no_root_error
;
362 * Create an RPC client handle.
364 static struct rpc_clnt
*
365 nfs_create_client(struct nfs_server
*server
, const struct nfs_mount_data
*data
)
367 struct rpc_timeout timeparms
;
368 struct rpc_xprt
*xprt
= NULL
;
369 struct rpc_clnt
*clnt
= NULL
;
370 int tcp
= (data
->flags
& NFS_MOUNT_TCP
);
372 /* Initialize timeout values */
373 timeparms
.to_initval
= data
->timeo
* HZ
/ 10;
374 timeparms
.to_retries
= data
->retrans
;
375 timeparms
.to_maxval
= tcp
? RPC_MAX_TCP_TIMEOUT
: RPC_MAX_UDP_TIMEOUT
;
376 timeparms
.to_exponential
= 1;
378 if (!timeparms
.to_initval
)
379 timeparms
.to_initval
= (tcp
? 600 : 11) * HZ
/ 10;
380 if (!timeparms
.to_retries
)
381 timeparms
.to_retries
= 5;
383 /* create transport and client */
384 xprt
= xprt_create_proto(tcp
? IPPROTO_TCP
: IPPROTO_UDP
,
385 &server
->addr
, &timeparms
);
387 dprintk("%s: cannot create RPC transport. Error = %ld\n",
388 __FUNCTION__
, PTR_ERR(xprt
));
389 return (struct rpc_clnt
*)xprt
;
391 clnt
= rpc_create_client(xprt
, server
->hostname
, &nfs_program
,
392 server
->rpc_ops
->version
, data
->pseudoflavor
);
394 dprintk("%s: cannot create RPC client. Error = %ld\n",
395 __FUNCTION__
, PTR_ERR(xprt
));
400 clnt
->cl_softrtry
= 1;
410 * The way this works is that the mount process passes a structure
411 * in the data argument which contains the server's IP address
412 * and the root file handle obtained from the server's mount
413 * daemon. We stash these away in the private superblock fields.
416 nfs_fill_super(struct super_block
*sb
, struct nfs_mount_data
*data
, int silent
)
418 struct nfs_server
*server
;
419 rpc_authflavor_t authflavor
;
422 sb
->s_blocksize_bits
= 0;
425 sb
->s_blocksize
= nfs_block_size(data
->bsize
, &sb
->s_blocksize_bits
);
427 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
429 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
430 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
432 server
->acregmin
= data
->acregmin
*HZ
;
433 server
->acregmax
= data
->acregmax
*HZ
;
434 server
->acdirmin
= data
->acdirmin
*HZ
;
435 server
->acdirmax
= data
->acdirmax
*HZ
;
437 /* Start lockd here, before we might error out */
438 if (!(server
->flags
& NFS_MOUNT_NONLM
))
441 server
->namelen
= data
->namlen
;
442 server
->hostname
= kmalloc(strlen(data
->hostname
) + 1, GFP_KERNEL
);
443 if (!server
->hostname
)
445 strcpy(server
->hostname
, data
->hostname
);
447 /* Check NFS protocol revision and initialize RPC op vector
448 * and file handle pool. */
450 if (server
->flags
& NFS_MOUNT_VER3
) {
451 server
->rpc_ops
= &nfs_v3_clientops
;
452 server
->caps
|= NFS_CAP_READDIRPLUS
;
454 server
->rpc_ops
= &nfs_v2_clientops
;
457 server
->rpc_ops
= &nfs_v2_clientops
;
460 /* Fill in pseudoflavor for mount version < 5 */
461 if (!(data
->flags
& NFS_MOUNT_SECFLAVOUR
))
462 data
->pseudoflavor
= RPC_AUTH_UNIX
;
463 authflavor
= data
->pseudoflavor
; /* save for sb_init() */
464 /* XXX maybe we want to add a server->pseudoflavor field */
466 /* Create RPC client handles */
467 server
->client
= nfs_create_client(server
, data
);
468 if (IS_ERR(server
->client
))
469 return PTR_ERR(server
->client
);
470 /* RFC 2623, sec 2.3.2 */
471 if (authflavor
!= RPC_AUTH_UNIX
) {
472 struct rpc_auth
*auth
;
474 server
->client_sys
= rpc_clone_client(server
->client
);
475 if (IS_ERR(server
->client_sys
))
476 return PTR_ERR(server
->client_sys
);
477 auth
= rpcauth_create(RPC_AUTH_UNIX
, server
->client_sys
);
479 return PTR_ERR(auth
);
481 atomic_inc(&server
->client
->cl_count
);
482 server
->client_sys
= server
->client
;
484 if (server
->flags
& NFS_MOUNT_VER3
) {
485 #ifdef CONFIG_NFS_V3_ACL
486 if (!(server
->flags
& NFS_MOUNT_NOACL
)) {
487 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
488 /* No errors! Assume that Sun nfsacls are supported */
489 if (!IS_ERR(server
->client_acl
))
490 server
->caps
|= NFS_CAP_ACLS
;
493 server
->flags
&= ~NFS_MOUNT_NOACL
;
494 #endif /* CONFIG_NFS_V3_ACL */
496 * The VFS shouldn't apply the umask to mode bits. We will
497 * do so ourselves when necessary.
499 sb
->s_flags
|= MS_POSIXACL
;
500 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
501 server
->namelen
= NFS3_MAXNAMLEN
;
504 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
505 server
->namelen
= NFS2_MAXNAMLEN
;
508 sb
->s_op
= &nfs_sops
;
509 return nfs_sb_init(sb
, authflavor
);
513 nfs_statfs(struct super_block
*sb
, struct kstatfs
*buf
)
515 struct nfs_server
*server
= NFS_SB(sb
);
516 unsigned char blockbits
;
517 unsigned long blockres
;
518 struct nfs_fh
*rootfh
= NFS_FH(sb
->s_root
->d_inode
);
519 struct nfs_fattr fattr
;
520 struct nfs_fsstat res
= {
527 error
= server
->rpc_ops
->statfs(server
, rootfh
, &res
);
528 buf
->f_type
= NFS_SUPER_MAGIC
;
533 * Current versions of glibc do not correctly handle the
534 * case where f_frsize != f_bsize. Eventually we want to
535 * report the value of wtmult in this field.
537 buf
->f_frsize
= sb
->s_blocksize
;
540 * On most *nix systems, f_blocks, f_bfree, and f_bavail
541 * are reported in units of f_frsize. Linux hasn't had
542 * an f_frsize field in its statfs struct until recently,
543 * thus historically Linux's sys_statfs reports these
544 * fields in units of f_bsize.
546 buf
->f_bsize
= sb
->s_blocksize
;
547 blockbits
= sb
->s_blocksize_bits
;
548 blockres
= (1 << blockbits
) - 1;
549 buf
->f_blocks
= (res
.tbytes
+ blockres
) >> blockbits
;
550 buf
->f_bfree
= (res
.fbytes
+ blockres
) >> blockbits
;
551 buf
->f_bavail
= (res
.abytes
+ blockres
) >> blockbits
;
553 buf
->f_files
= res
.tfiles
;
554 buf
->f_ffree
= res
.afiles
;
556 buf
->f_namelen
= server
->namelen
;
563 printk(KERN_WARNING
"nfs_statfs: statfs error = %d\n", -error
);
564 buf
->f_bsize
= buf
->f_blocks
= buf
->f_bfree
= buf
->f_bavail
= -1;
569 static int nfs_show_options(struct seq_file
*m
, struct vfsmount
*mnt
)
571 static struct proc_nfs_info
{
576 { NFS_MOUNT_SOFT
, ",soft", ",hard" },
577 { NFS_MOUNT_INTR
, ",intr", "" },
578 { NFS_MOUNT_POSIX
, ",posix", "" },
579 { NFS_MOUNT_TCP
, ",tcp", ",udp" },
580 { NFS_MOUNT_NOCTO
, ",nocto", "" },
581 { NFS_MOUNT_NOAC
, ",noac", "" },
582 { NFS_MOUNT_NONLM
, ",nolock", ",lock" },
583 { NFS_MOUNT_NOACL
, ",noacl", "" },
586 struct proc_nfs_info
*nfs_infop
;
587 struct nfs_server
*nfss
= NFS_SB(mnt
->mnt_sb
);
589 seq_printf(m
, ",v%d", nfss
->rpc_ops
->version
);
590 seq_printf(m
, ",rsize=%d", nfss
->rsize
);
591 seq_printf(m
, ",wsize=%d", nfss
->wsize
);
592 if (nfss
->acregmin
!= 3*HZ
)
593 seq_printf(m
, ",acregmin=%d", nfss
->acregmin
/HZ
);
594 if (nfss
->acregmax
!= 60*HZ
)
595 seq_printf(m
, ",acregmax=%d", nfss
->acregmax
/HZ
);
596 if (nfss
->acdirmin
!= 30*HZ
)
597 seq_printf(m
, ",acdirmin=%d", nfss
->acdirmin
/HZ
);
598 if (nfss
->acdirmax
!= 60*HZ
)
599 seq_printf(m
, ",acdirmax=%d", nfss
->acdirmax
/HZ
);
600 for (nfs_infop
= nfs_info
; nfs_infop
->flag
; nfs_infop
++) {
601 if (nfss
->flags
& nfs_infop
->flag
)
602 seq_puts(m
, nfs_infop
->str
);
604 seq_puts(m
, nfs_infop
->nostr
);
606 seq_puts(m
, ",addr=");
607 seq_escape(m
, nfss
->hostname
, " \t\n\\");
612 * Invalidate the local caches
615 nfs_zap_caches(struct inode
*inode
)
617 struct nfs_inode
*nfsi
= NFS_I(inode
);
618 int mode
= inode
->i_mode
;
620 spin_lock(&inode
->i_lock
);
622 NFS_ATTRTIMEO(inode
) = NFS_MINATTRTIMEO(inode
);
623 NFS_ATTRTIMEO_UPDATE(inode
) = jiffies
;
625 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
626 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
627 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
629 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
631 spin_unlock(&inode
->i_lock
);
634 static void nfs_zap_acl_cache(struct inode
*inode
)
636 void (*clear_acl_cache
)(struct inode
*);
638 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
639 if (clear_acl_cache
!= NULL
)
640 clear_acl_cache(inode
);
641 spin_lock(&inode
->i_lock
);
642 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
643 spin_unlock(&inode
->i_lock
);
647 * Invalidate, but do not unhash, the inode
650 nfs_invalidate_inode(struct inode
*inode
)
652 umode_t save_mode
= inode
->i_mode
;
654 make_bad_inode(inode
);
655 inode
->i_mode
= save_mode
;
656 nfs_zap_caches(inode
);
659 struct nfs_find_desc
{
661 struct nfs_fattr
*fattr
;
665 * In NFSv3 we can have 64bit inode numbers. In order to support
666 * this, and re-exported directories (also seen in NFSv2)
667 * we are forced to allow 2 different inodes to have the same
671 nfs_find_actor(struct inode
*inode
, void *opaque
)
673 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
674 struct nfs_fh
*fh
= desc
->fh
;
675 struct nfs_fattr
*fattr
= desc
->fattr
;
677 if (NFS_FILEID(inode
) != fattr
->fileid
)
679 if (nfs_compare_fh(NFS_FH(inode
), fh
))
681 if (is_bad_inode(inode
) || NFS_STALE(inode
))
687 nfs_init_locked(struct inode
*inode
, void *opaque
)
689 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
690 struct nfs_fattr
*fattr
= desc
->fattr
;
692 NFS_FILEID(inode
) = fattr
->fileid
;
693 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
697 /* Don't use READDIRPLUS on directories that we believe are too large */
698 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
701 * This is our front-end to iget that looks up inodes by file handle
702 * instead of inode number.
705 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
707 struct nfs_find_desc desc
= {
711 struct inode
*inode
= NULL
;
714 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
718 printk("NFS: Buggy server - nlink == 0!\n");
722 hash
= nfs_fattr_to_ino_t(fattr
);
724 if (!(inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
)))
727 if (inode
->i_state
& I_NEW
) {
728 struct nfs_inode
*nfsi
= NFS_I(inode
);
730 /* We set i_ino for the few things that still rely on it,
734 /* We can't support update_atime(), since the server will reset it */
735 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
736 inode
->i_mode
= fattr
->mode
;
737 /* Why so? Because we want revalidate for devices/FIFOs, and
738 * that's precisely what we have in nfs_file_inode_operations.
740 inode
->i_op
= NFS_SB(sb
)->rpc_ops
->file_inode_ops
;
741 if (S_ISREG(inode
->i_mode
)) {
742 inode
->i_fop
= &nfs_file_operations
;
743 inode
->i_data
.a_ops
= &nfs_file_aops
;
744 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
745 } else if (S_ISDIR(inode
->i_mode
)) {
746 inode
->i_op
= NFS_SB(sb
)->rpc_ops
->dir_inode_ops
;
747 inode
->i_fop
= &nfs_dir_operations
;
748 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
749 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
750 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_FLAGS(inode
));
751 } else if (S_ISLNK(inode
->i_mode
))
752 inode
->i_op
= &nfs_symlink_inode_operations
;
754 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
756 nfsi
->read_cache_jiffies
= fattr
->timestamp
;
757 inode
->i_atime
= fattr
->atime
;
758 inode
->i_mtime
= fattr
->mtime
;
759 inode
->i_ctime
= fattr
->ctime
;
760 if (fattr
->valid
& NFS_ATTR_FATTR_V4
)
761 nfsi
->change_attr
= fattr
->change_attr
;
762 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
763 inode
->i_nlink
= fattr
->nlink
;
764 inode
->i_uid
= fattr
->uid
;
765 inode
->i_gid
= fattr
->gid
;
766 if (fattr
->valid
& (NFS_ATTR_FATTR_V3
| NFS_ATTR_FATTR_V4
)) {
768 * report the blocks in 512byte units
770 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
771 inode
->i_blksize
= inode
->i_sb
->s_blocksize
;
773 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
774 inode
->i_blksize
= fattr
->du
.nfs2
.blocksize
;
776 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
777 nfsi
->attrtimeo_timestamp
= jiffies
;
778 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
779 nfsi
->cache_access
.cred
= NULL
;
781 unlock_new_inode(inode
);
783 nfs_refresh_inode(inode
, fattr
);
784 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
786 (long long)NFS_FILEID(inode
),
787 atomic_read(&inode
->i_count
));
793 printk("nfs_fhget: iget failed\n");
797 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET)
800 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
802 struct inode
*inode
= dentry
->d_inode
;
803 struct nfs_fattr fattr
;
806 if (attr
->ia_valid
& ATTR_SIZE
) {
807 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
808 attr
->ia_valid
&= ~ATTR_SIZE
;
811 /* Optimization: if the end result is no change, don't RPC */
812 attr
->ia_valid
&= NFS_VALID_ATTRS
;
813 if (attr
->ia_valid
== 0)
817 nfs_begin_data_update(inode
);
818 /* Write all dirty data if we're changing file permissions or size */
819 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
|ATTR_SIZE
)) != 0) {
820 if (filemap_fdatawrite(inode
->i_mapping
) == 0)
821 filemap_fdatawait(inode
->i_mapping
);
824 error
= NFS_PROTO(inode
)->setattr(dentry
, &fattr
, attr
);
826 nfs_refresh_inode(inode
, &fattr
);
827 nfs_end_data_update(inode
);
833 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
834 * @inode: pointer to struct inode
835 * @attr: pointer to struct iattr
837 * Note: we do this in the *proc.c in order to ensure that
838 * it works for things like exclusive creates too.
840 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
842 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
843 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
844 int mode
= attr
->ia_mode
& S_IALLUGO
;
845 mode
|= inode
->i_mode
& ~S_IALLUGO
;
846 inode
->i_mode
= mode
;
848 if ((attr
->ia_valid
& ATTR_UID
) != 0)
849 inode
->i_uid
= attr
->ia_uid
;
850 if ((attr
->ia_valid
& ATTR_GID
) != 0)
851 inode
->i_gid
= attr
->ia_gid
;
852 spin_lock(&inode
->i_lock
);
853 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
854 spin_unlock(&inode
->i_lock
);
856 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
857 inode
->i_size
= attr
->ia_size
;
858 vmtruncate(inode
, attr
->ia_size
);
862 static int nfs_wait_schedule(void *word
)
864 if (signal_pending(current
))
871 * Wait for the inode to get unlocked.
873 static int nfs_wait_on_inode(struct inode
*inode
)
875 struct rpc_clnt
*clnt
= NFS_CLIENT(inode
);
876 struct nfs_inode
*nfsi
= NFS_I(inode
);
880 atomic_inc(&inode
->i_count
);
881 rpc_clnt_sigmask(clnt
, &oldmask
);
882 error
= wait_on_bit_lock(&nfsi
->flags
, NFS_INO_REVALIDATING
,
883 nfs_wait_schedule
, TASK_INTERRUPTIBLE
);
884 rpc_clnt_sigunmask(clnt
, &oldmask
);
890 static void nfs_wake_up_inode(struct inode
*inode
)
892 struct nfs_inode
*nfsi
= NFS_I(inode
);
894 clear_bit(NFS_INO_REVALIDATING
, &nfsi
->flags
);
895 smp_mb__after_clear_bit();
896 wake_up_bit(&nfsi
->flags
, NFS_INO_REVALIDATING
);
899 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
901 struct inode
*inode
= dentry
->d_inode
;
902 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
905 if (__IS_FLG(inode
, MS_NOATIME
))
907 else if (__IS_FLG(inode
, MS_NODIRATIME
) && S_ISDIR(inode
->i_mode
))
909 /* We may force a getattr if the user cares about atime */
911 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
913 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
915 generic_fillattr(inode
, stat
);
919 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, struct rpc_cred
*cred
)
921 struct nfs_open_context
*ctx
;
923 ctx
= (struct nfs_open_context
*)kmalloc(sizeof(*ctx
), GFP_KERNEL
);
925 atomic_set(&ctx
->count
, 1);
926 ctx
->dentry
= dget(dentry
);
927 ctx
->cred
= get_rpccred(cred
);
929 ctx
->lockowner
= current
->files
;
936 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
939 atomic_inc(&ctx
->count
);
943 void put_nfs_open_context(struct nfs_open_context
*ctx
)
945 if (atomic_dec_and_test(&ctx
->count
)) {
946 if (!list_empty(&ctx
->list
)) {
947 struct inode
*inode
= ctx
->dentry
->d_inode
;
948 spin_lock(&inode
->i_lock
);
949 list_del(&ctx
->list
);
950 spin_unlock(&inode
->i_lock
);
952 if (ctx
->state
!= NULL
)
953 nfs4_close_state(ctx
->state
, ctx
->mode
);
954 if (ctx
->cred
!= NULL
)
955 put_rpccred(ctx
->cred
);
962 * Ensure that mmap has a recent RPC credential for use when writing out
965 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
967 struct inode
*inode
= filp
->f_dentry
->d_inode
;
968 struct nfs_inode
*nfsi
= NFS_I(inode
);
970 filp
->private_data
= get_nfs_open_context(ctx
);
971 spin_lock(&inode
->i_lock
);
972 list_add(&ctx
->list
, &nfsi
->open_files
);
973 spin_unlock(&inode
->i_lock
);
976 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, int mode
)
978 struct nfs_inode
*nfsi
= NFS_I(inode
);
979 struct nfs_open_context
*pos
, *ctx
= NULL
;
981 spin_lock(&inode
->i_lock
);
982 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
983 if ((pos
->mode
& mode
) == mode
) {
984 ctx
= get_nfs_open_context(pos
);
988 spin_unlock(&inode
->i_lock
);
992 void nfs_file_clear_open_context(struct file
*filp
)
994 struct inode
*inode
= filp
->f_dentry
->d_inode
;
995 struct nfs_open_context
*ctx
= (struct nfs_open_context
*)filp
->private_data
;
998 filp
->private_data
= NULL
;
999 spin_lock(&inode
->i_lock
);
1000 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
1001 spin_unlock(&inode
->i_lock
);
1002 put_nfs_open_context(ctx
);
1007 * These allocate and release file read/write context information.
1009 int nfs_open(struct inode
*inode
, struct file
*filp
)
1011 struct nfs_open_context
*ctx
;
1012 struct rpc_cred
*cred
;
1014 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
1016 return PTR_ERR(cred
);
1017 ctx
= alloc_nfs_open_context(filp
->f_dentry
, cred
);
1021 ctx
->mode
= filp
->f_mode
;
1022 nfs_file_set_open_context(filp
, ctx
);
1023 put_nfs_open_context(ctx
);
1024 if ((filp
->f_mode
& FMODE_WRITE
) != 0)
1025 nfs_begin_data_update(inode
);
1029 int nfs_release(struct inode
*inode
, struct file
*filp
)
1031 if ((filp
->f_mode
& FMODE_WRITE
) != 0)
1032 nfs_end_data_update(inode
);
1033 nfs_file_clear_open_context(filp
);
1038 * This function is called whenever some part of NFS notices that
1039 * the cached attributes have to be refreshed.
1042 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1044 int status
= -ESTALE
;
1045 struct nfs_fattr fattr
;
1046 struct nfs_inode
*nfsi
= NFS_I(inode
);
1047 unsigned long verifier
;
1048 unsigned long cache_validity
;
1050 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
1051 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
1054 if (!inode
|| is_bad_inode(inode
))
1056 if (NFS_STALE(inode
))
1059 status
= nfs_wait_on_inode(inode
);
1062 if (NFS_STALE(inode
)) {
1064 /* Do we trust the cached ESTALE? */
1065 if (NFS_ATTRTIMEO(inode
) != 0) {
1066 if (nfsi
->cache_validity
& (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ATIME
)) {
1073 /* Protect against RPC races by saving the change attribute */
1074 verifier
= nfs_save_change_attribute(inode
);
1075 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), &fattr
);
1077 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
1079 (long long)NFS_FILEID(inode
), status
);
1080 if (status
== -ESTALE
) {
1081 nfs_zap_caches(inode
);
1082 if (!S_ISDIR(inode
->i_mode
))
1083 set_bit(NFS_INO_STALE
, &NFS_FLAGS(inode
));
1088 status
= nfs_update_inode(inode
, &fattr
, verifier
);
1090 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
1092 (long long)NFS_FILEID(inode
), status
);
1095 spin_lock(&inode
->i_lock
);
1096 cache_validity
= nfsi
->cache_validity
;
1097 nfsi
->cache_validity
&= ~NFS_INO_REVAL_PAGECACHE
;
1100 * We may need to keep the attributes marked as invalid if
1101 * we raced with nfs_end_attr_update().
1103 if (verifier
== nfsi
->cache_change_attribute
)
1104 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ATIME
);
1105 spin_unlock(&inode
->i_lock
);
1107 nfs_revalidate_mapping(inode
, inode
->i_mapping
);
1109 if (cache_validity
& NFS_INO_INVALID_ACL
)
1110 nfs_zap_acl_cache(inode
);
1112 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
1114 (long long)NFS_FILEID(inode
));
1117 nfs_wake_up_inode(inode
);
1124 int nfs_attribute_timeout(struct inode
*inode
)
1126 struct nfs_inode
*nfsi
= NFS_I(inode
);
1128 if (nfs_have_delegation(inode
, FMODE_READ
))
1130 return time_after(jiffies
, nfsi
->read_cache_jiffies
+nfsi
->attrtimeo
);
1134 * nfs_revalidate_inode - Revalidate the inode attributes
1135 * @server - pointer to nfs_server struct
1136 * @inode - pointer to inode struct
1138 * Updates inode attribute information by retrieving the data from the server.
1140 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1142 if (!(NFS_I(inode
)->cache_validity
& (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
))
1143 && !nfs_attribute_timeout(inode
))
1144 return NFS_STALE(inode
) ? -ESTALE
: 0;
1145 return __nfs_revalidate_inode(server
, inode
);
1149 * nfs_revalidate_mapping - Revalidate the pagecache
1150 * @inode - pointer to host inode
1151 * @mapping - pointer to mapping
1153 void nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1155 struct nfs_inode
*nfsi
= NFS_I(inode
);
1157 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
) {
1158 if (S_ISREG(inode
->i_mode
)) {
1159 if (filemap_fdatawrite(mapping
) == 0)
1160 filemap_fdatawait(mapping
);
1163 invalidate_inode_pages2(mapping
);
1165 spin_lock(&inode
->i_lock
);
1166 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1167 if (S_ISDIR(inode
->i_mode
)) {
1168 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1169 /* This ensures we revalidate child dentries */
1170 nfsi
->cache_change_attribute
++;
1172 spin_unlock(&inode
->i_lock
);
1174 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
1176 (long long)NFS_FILEID(inode
));
1181 * nfs_begin_data_update
1182 * @inode - pointer to inode
1183 * Declare that a set of operations will update file data on the server
1185 void nfs_begin_data_update(struct inode
*inode
)
1187 atomic_inc(&NFS_I(inode
)->data_updates
);
1191 * nfs_end_data_update
1192 * @inode - pointer to inode
1193 * Declare end of the operations that will update file data
1194 * This will mark the inode as immediately needing revalidation
1195 * of its attribute cache.
1197 void nfs_end_data_update(struct inode
*inode
)
1199 struct nfs_inode
*nfsi
= NFS_I(inode
);
1201 if (!nfs_have_delegation(inode
, FMODE_READ
)) {
1202 /* Mark the attribute cache for revalidation */
1203 spin_lock(&inode
->i_lock
);
1204 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1205 /* Directories and symlinks: invalidate page cache too */
1206 if (S_ISDIR(inode
->i_mode
) || S_ISLNK(inode
->i_mode
))
1207 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1208 spin_unlock(&inode
->i_lock
);
1210 nfsi
->cache_change_attribute
++;
1211 atomic_dec(&nfsi
->data_updates
);
1215 * nfs_refresh_inode - verify consistency of the inode attribute cache
1216 * @inode - pointer to inode
1217 * @fattr - updated attributes
1219 * Verifies the attribute cache. If we have just changed the attributes,
1220 * so that fattr carries weak cache consistency data, then it may
1221 * also update the ctime/mtime/change_attribute.
1223 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1225 struct nfs_inode
*nfsi
= NFS_I(inode
);
1226 loff_t cur_size
, new_isize
;
1229 /* Do we hold a delegation? */
1230 if (nfs_have_delegation(inode
, FMODE_READ
))
1233 spin_lock(&inode
->i_lock
);
1235 /* Are we in the process of updating data on the server? */
1236 data_unstable
= nfs_caches_unstable(inode
);
1238 if (fattr
->valid
& NFS_ATTR_FATTR_V4
) {
1239 if ((fattr
->valid
& NFS_ATTR_PRE_CHANGE
) != 0
1240 && nfsi
->change_attr
== fattr
->pre_change_attr
)
1241 nfsi
->change_attr
= fattr
->change_attr
;
1242 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1243 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1245 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1249 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0) {
1250 spin_unlock(&inode
->i_lock
);
1254 /* Has the inode gone and changed behind our back? */
1255 if (nfsi
->fileid
!= fattr
->fileid
1256 || (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1257 spin_unlock(&inode
->i_lock
);
1261 cur_size
= i_size_read(inode
);
1262 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1264 /* If we have atomic WCC data, we may update some attributes */
1265 if ((fattr
->valid
& NFS_ATTR_WCC
) != 0) {
1266 if (timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
))
1267 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1268 if (timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
))
1269 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1272 /* Verify a few of the more important attributes */
1273 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1274 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1276 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1278 if (cur_size
!= new_isize
) {
1279 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1280 if (nfsi
->npages
== 0)
1281 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1284 /* Have any file permissions changed? */
1285 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)
1286 || inode
->i_uid
!= fattr
->uid
1287 || inode
->i_gid
!= fattr
->gid
)
1288 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1290 /* Has the link count changed? */
1291 if (inode
->i_nlink
!= fattr
->nlink
)
1292 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1294 if (!timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1295 nfsi
->cache_validity
|= NFS_INO_INVALID_ATIME
;
1297 nfsi
->read_cache_jiffies
= fattr
->timestamp
;
1298 spin_unlock(&inode
->i_lock
);
1303 * Many nfs protocol calls return the new file attributes after
1304 * an operation. Here we update the inode to reflect the state
1305 * of the server's inode.
1307 * This is a bit tricky because we have to make sure all dirty pages
1308 * have been sent off to the server before calling invalidate_inode_pages.
1309 * To make sure no other process adds more write requests while we try
1310 * our best to flush them, we make them sleep during the attribute refresh.
1312 * A very similar scenario holds for the dir cache.
1314 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
, unsigned long verifier
)
1316 struct nfs_inode
*nfsi
= NFS_I(inode
);
1317 loff_t cur_isize
, new_isize
;
1318 unsigned int invalid
= 0;
1321 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1322 __FUNCTION__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1323 atomic_read(&inode
->i_count
), fattr
->valid
);
1325 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1328 if (nfsi
->fileid
!= fattr
->fileid
) {
1329 printk(KERN_ERR
"%s: inode number mismatch\n"
1330 "expected (%s/0x%Lx), got (%s/0x%Lx)\n",
1332 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1333 inode
->i_sb
->s_id
, (long long)fattr
->fileid
);
1337 spin_lock(&inode
->i_lock
);
1340 * Make sure the inode's type hasn't changed.
1342 if ((inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1343 spin_unlock(&inode
->i_lock
);
1348 * Update the read time so we don't revalidate too often.
1350 nfsi
->read_cache_jiffies
= fattr
->timestamp
;
1352 /* Are we racing with known updates of the metadata on the server? */
1353 data_unstable
= ! nfs_verify_change_attribute(inode
, verifier
);
1355 /* Check if our cached file size is stale */
1356 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1357 cur_isize
= i_size_read(inode
);
1358 if (new_isize
!= cur_isize
) {
1359 /* Do we perhaps have any outstanding writes? */
1360 if (nfsi
->npages
== 0) {
1361 /* No, but did we race with nfs_end_data_update()? */
1362 if (verifier
== nfsi
->cache_change_attribute
) {
1363 inode
->i_size
= new_isize
;
1364 invalid
|= NFS_INO_INVALID_DATA
;
1366 invalid
|= NFS_INO_INVALID_ATTR
;
1367 } else if (new_isize
> cur_isize
) {
1368 inode
->i_size
= new_isize
;
1369 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1371 dprintk("NFS: isize change on server for file %s/%ld\n",
1372 inode
->i_sb
->s_id
, inode
->i_ino
);
1375 /* Check if the mtime agrees */
1376 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1377 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1378 dprintk("NFS: mtime change on server for file %s/%ld\n",
1379 inode
->i_sb
->s_id
, inode
->i_ino
);
1381 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1384 if ((fattr
->valid
& NFS_ATTR_FATTR_V4
)
1385 && nfsi
->change_attr
!= fattr
->change_attr
) {
1386 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1387 inode
->i_sb
->s_id
, inode
->i_ino
);
1388 nfsi
->change_attr
= fattr
->change_attr
;
1390 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1393 /* If ctime has changed we should definitely clear access+acl caches */
1394 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1396 invalid
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1397 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1399 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1401 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
) ||
1402 inode
->i_uid
!= fattr
->uid
||
1403 inode
->i_gid
!= fattr
->gid
)
1404 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1406 inode
->i_mode
= fattr
->mode
;
1407 inode
->i_nlink
= fattr
->nlink
;
1408 inode
->i_uid
= fattr
->uid
;
1409 inode
->i_gid
= fattr
->gid
;
1411 if (fattr
->valid
& (NFS_ATTR_FATTR_V3
| NFS_ATTR_FATTR_V4
)) {
1413 * report the blocks in 512byte units
1415 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1416 inode
->i_blksize
= inode
->i_sb
->s_blocksize
;
1418 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1419 inode
->i_blksize
= fattr
->du
.nfs2
.blocksize
;
1422 /* Update attrtimeo value if we're out of the unstable period */
1423 if (invalid
& NFS_INO_INVALID_ATTR
) {
1424 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1425 nfsi
->attrtimeo_timestamp
= jiffies
;
1426 } else if (time_after(jiffies
, nfsi
->attrtimeo_timestamp
+nfsi
->attrtimeo
)) {
1427 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1428 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1429 nfsi
->attrtimeo_timestamp
= jiffies
;
1431 /* Don't invalidate the data if we were to blame */
1432 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1433 || S_ISLNK(inode
->i_mode
)))
1434 invalid
&= ~NFS_INO_INVALID_DATA
;
1435 if (!nfs_have_delegation(inode
, FMODE_READ
))
1436 nfsi
->cache_validity
|= invalid
;
1438 spin_unlock(&inode
->i_lock
);
1442 * Big trouble! The inode has become a different object.
1445 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1446 __FUNCTION__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1449 * No need to worry about unhashing the dentry, as the
1450 * lookup validation will know that the inode is bad.
1451 * (But we fall through to invalidate the caches.)
1453 nfs_invalidate_inode(inode
);
1455 set_bit(NFS_INO_STALE
, &NFS_FLAGS(inode
));
1460 * File system information
1463 static int nfs_set_super(struct super_block
*s
, void *data
)
1465 s
->s_fs_info
= data
;
1466 return set_anon_super(s
, data
);
1469 static int nfs_compare_super(struct super_block
*sb
, void *data
)
1471 struct nfs_server
*server
= data
;
1472 struct nfs_server
*old
= NFS_SB(sb
);
1474 if (old
->addr
.sin_addr
.s_addr
!= server
->addr
.sin_addr
.s_addr
)
1476 if (old
->addr
.sin_port
!= server
->addr
.sin_port
)
1478 return !nfs_compare_fh(&old
->fh
, &server
->fh
);
1481 static struct super_block
*nfs_get_sb(struct file_system_type
*fs_type
,
1482 int flags
, const char *dev_name
, void *raw_data
)
1485 struct nfs_server
*server
= NULL
;
1486 struct super_block
*s
;
1487 struct nfs_fh
*root
;
1488 struct nfs_mount_data
*data
= raw_data
;
1490 s
= ERR_PTR(-EINVAL
);
1492 dprintk("%s: missing data argument\n", __FUNCTION__
);
1495 if (data
->version
<= 0 || data
->version
> NFS_MOUNT_VERSION
) {
1496 dprintk("%s: bad mount version\n", __FUNCTION__
);
1499 switch (data
->version
) {
1505 if (data
->flags
& NFS_MOUNT_VER3
) {
1506 dprintk("%s: mount structure version %d does not support NFSv3\n",
1511 data
->root
.size
= NFS2_FHSIZE
;
1512 memcpy(data
->root
.data
, data
->old_root
.data
, NFS2_FHSIZE
);
1514 if (data
->flags
& NFS_MOUNT_SECFLAVOUR
) {
1515 dprintk("%s: mount structure version %d does not support strong security\n",
1521 memset(data
->context
, 0, sizeof(data
->context
));
1523 #ifndef CONFIG_NFS_V3
1524 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1525 s
= ERR_PTR(-EPROTONOSUPPORT
);
1526 if (data
->flags
& NFS_MOUNT_VER3
) {
1527 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__
);
1530 #endif /* CONFIG_NFS_V3 */
1532 s
= ERR_PTR(-ENOMEM
);
1533 server
= kmalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1536 memset(server
, 0, sizeof(struct nfs_server
));
1537 /* Zero out the NFS state stuff */
1538 init_nfsv4_state(server
);
1539 server
->client
= server
->client_sys
= server
->client_acl
= ERR_PTR(-EINVAL
);
1542 if (data
->flags
& NFS_MOUNT_VER3
)
1543 root
->size
= data
->root
.size
;
1545 root
->size
= NFS2_FHSIZE
;
1546 s
= ERR_PTR(-EINVAL
);
1547 if (root
->size
> sizeof(root
->data
)) {
1548 dprintk("%s: invalid root filehandle\n", __FUNCTION__
);
1551 memcpy(root
->data
, data
->root
.data
, root
->size
);
1553 /* We now require that the mount process passes the remote address */
1554 memcpy(&server
->addr
, &data
->addr
, sizeof(server
->addr
));
1555 if (server
->addr
.sin_addr
.s_addr
== INADDR_ANY
) {
1556 dprintk("%s: mount program didn't pass remote address!\n",
1561 /* Fire up rpciod if not yet running */
1562 s
= ERR_PTR(rpciod_up());
1564 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1565 __FUNCTION__
, PTR_ERR(s
));
1569 s
= sget(fs_type
, nfs_compare_super
, nfs_set_super
, server
);
1570 if (IS_ERR(s
) || s
->s_root
)
1571 goto out_rpciod_down
;
1575 error
= nfs_fill_super(s
, data
, flags
& MS_VERBOSE
? 1 : 0);
1577 up_write(&s
->s_umount
);
1578 deactivate_super(s
);
1579 return ERR_PTR(error
);
1581 s
->s_flags
|= MS_ACTIVE
;
1590 static void nfs_kill_super(struct super_block
*s
)
1592 struct nfs_server
*server
= NFS_SB(s
);
1596 if (!IS_ERR(server
->client
))
1597 rpc_shutdown_client(server
->client
);
1598 if (!IS_ERR(server
->client_sys
))
1599 rpc_shutdown_client(server
->client_sys
);
1600 if (!IS_ERR(server
->client_acl
))
1601 rpc_shutdown_client(server
->client_acl
);
1603 if (!(server
->flags
& NFS_MOUNT_NONLM
))
1604 lockd_down(); /* release rpc.lockd */
1606 rpciod_down(); /* release rpciod */
1608 if (server
->hostname
!= NULL
)
1609 kfree(server
->hostname
);
1613 static struct file_system_type nfs_fs_type
= {
1614 .owner
= THIS_MODULE
,
1616 .get_sb
= nfs_get_sb
,
1617 .kill_sb
= nfs_kill_super
,
1618 .fs_flags
= FS_ODD_RENAME
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
1621 #ifdef CONFIG_NFS_V4
1623 static void nfs4_clear_inode(struct inode
*);
1626 static struct super_operations nfs4_sops
= {
1627 .alloc_inode
= nfs_alloc_inode
,
1628 .destroy_inode
= nfs_destroy_inode
,
1629 .write_inode
= nfs_write_inode
,
1630 .delete_inode
= nfs_delete_inode
,
1631 .statfs
= nfs_statfs
,
1632 .clear_inode
= nfs4_clear_inode
,
1633 .umount_begin
= nfs_umount_begin
,
1634 .show_options
= nfs_show_options
,
1638 * Clean out any remaining NFSv4 state that might be left over due
1639 * to open() calls that passed nfs_atomic_lookup, but failed to call
1642 static void nfs4_clear_inode(struct inode
*inode
)
1644 struct nfs_inode
*nfsi
= NFS_I(inode
);
1646 /* If we are holding a delegation, return it! */
1647 if (nfsi
->delegation
!= NULL
)
1648 nfs_inode_return_delegation(inode
);
1649 /* First call standard NFS clear_inode() code */
1650 nfs_clear_inode(inode
);
1651 /* Now clear out any remaining state */
1652 while (!list_empty(&nfsi
->open_states
)) {
1653 struct nfs4_state
*state
;
1655 state
= list_entry(nfsi
->open_states
.next
,
1658 dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
1661 (long long)NFS_FILEID(inode
),
1663 BUG_ON(atomic_read(&state
->count
) != 1);
1664 nfs4_close_state(state
, state
->state
);
1669 static int nfs4_fill_super(struct super_block
*sb
, struct nfs4_mount_data
*data
, int silent
)
1671 struct nfs_server
*server
;
1672 struct nfs4_client
*clp
= NULL
;
1673 struct rpc_xprt
*xprt
= NULL
;
1674 struct rpc_clnt
*clnt
= NULL
;
1675 struct rpc_timeout timeparms
;
1676 rpc_authflavor_t authflavour
;
1677 int proto
, err
= -EIO
;
1679 sb
->s_blocksize_bits
= 0;
1680 sb
->s_blocksize
= 0;
1681 server
= NFS_SB(sb
);
1682 if (data
->rsize
!= 0)
1683 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1684 if (data
->wsize
!= 0)
1685 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1686 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
1687 server
->caps
= NFS_CAP_ATOMIC_OPEN
;
1689 server
->acregmin
= data
->acregmin
*HZ
;
1690 server
->acregmax
= data
->acregmax
*HZ
;
1691 server
->acdirmin
= data
->acdirmin
*HZ
;
1692 server
->acdirmax
= data
->acdirmax
*HZ
;
1694 server
->rpc_ops
= &nfs_v4_clientops
;
1695 /* Initialize timeout values */
1697 timeparms
.to_initval
= data
->timeo
* HZ
/ 10;
1698 timeparms
.to_retries
= data
->retrans
;
1699 timeparms
.to_exponential
= 1;
1700 if (!timeparms
.to_retries
)
1701 timeparms
.to_retries
= 5;
1703 proto
= data
->proto
;
1704 /* Which IP protocol do we use? */
1707 timeparms
.to_maxval
= RPC_MAX_TCP_TIMEOUT
;
1708 if (!timeparms
.to_initval
)
1709 timeparms
.to_initval
= 600 * HZ
/ 10;
1712 timeparms
.to_maxval
= RPC_MAX_UDP_TIMEOUT
;
1713 if (!timeparms
.to_initval
)
1714 timeparms
.to_initval
= 11 * HZ
/ 10;
1720 clp
= nfs4_get_client(&server
->addr
.sin_addr
);
1722 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__
);
1726 /* Now create transport and client */
1727 authflavour
= RPC_AUTH_UNIX
;
1728 if (data
->auth_flavourlen
!= 0) {
1729 if (data
->auth_flavourlen
!= 1) {
1730 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1731 __FUNCTION__
, data
->auth_flavourlen
);
1735 if (copy_from_user(&authflavour
, data
->auth_flavours
, sizeof(authflavour
))) {
1741 down_write(&clp
->cl_sem
);
1742 if (IS_ERR(clp
->cl_rpcclient
)) {
1743 xprt
= xprt_create_proto(proto
, &server
->addr
, &timeparms
);
1745 up_write(&clp
->cl_sem
);
1746 err
= PTR_ERR(xprt
);
1747 dprintk("%s: cannot create RPC transport. Error = %d\n",
1751 clnt
= rpc_create_client(xprt
, server
->hostname
, &nfs_program
,
1752 server
->rpc_ops
->version
, authflavour
);
1754 up_write(&clp
->cl_sem
);
1755 err
= PTR_ERR(clnt
);
1756 dprintk("%s: cannot create RPC client. Error = %d\n",
1761 clnt
->cl_softrtry
= 1;
1762 clnt
->cl_chatty
= 1;
1763 clp
->cl_rpcclient
= clnt
;
1764 clp
->cl_cred
= rpcauth_lookupcred(clnt
->cl_auth
, 0);
1765 if (IS_ERR(clp
->cl_cred
)) {
1766 up_write(&clp
->cl_sem
);
1767 err
= PTR_ERR(clp
->cl_cred
);
1768 clp
->cl_cred
= NULL
;
1771 memcpy(clp
->cl_ipaddr
, server
->ip_addr
, sizeof(clp
->cl_ipaddr
));
1774 if (list_empty(&clp
->cl_superblocks
)) {
1775 err
= nfs4_init_client(clp
);
1777 up_write(&clp
->cl_sem
);
1781 list_add_tail(&server
->nfs4_siblings
, &clp
->cl_superblocks
);
1782 clnt
= rpc_clone_client(clp
->cl_rpcclient
);
1784 server
->nfs4_state
= clp
;
1785 up_write(&clp
->cl_sem
);
1789 err
= PTR_ERR(clnt
);
1790 dprintk("%s: cannot create RPC client. Error = %d\n",
1795 server
->client
= clnt
;
1797 if (server
->nfs4_state
->cl_idmap
== NULL
) {
1798 dprintk("%s: failed to create idmapper.\n", __FUNCTION__
);
1802 if (clnt
->cl_auth
->au_flavor
!= authflavour
) {
1803 struct rpc_auth
*auth
;
1805 auth
= rpcauth_create(authflavour
, clnt
);
1807 dprintk("%s: couldn't create credcache!\n", __FUNCTION__
);
1808 return PTR_ERR(auth
);
1812 sb
->s_time_gran
= 1;
1814 sb
->s_op
= &nfs4_sops
;
1815 err
= nfs_sb_init(sb
, authflavour
);
1820 nfs4_put_client(clp
);
1824 static int nfs4_compare_super(struct super_block
*sb
, void *data
)
1826 struct nfs_server
*server
= data
;
1827 struct nfs_server
*old
= NFS_SB(sb
);
1829 if (strcmp(server
->hostname
, old
->hostname
) != 0)
1831 if (strcmp(server
->mnt_path
, old
->mnt_path
) != 0)
1837 nfs_copy_user_string(char *dst
, struct nfs_string
*src
, int maxlen
)
1842 return ERR_PTR(-EINVAL
);
1843 if (src
->len
< maxlen
)
1846 p
= dst
= kmalloc(maxlen
+ 1, GFP_KERNEL
);
1848 return ERR_PTR(-ENOMEM
);
1850 if (copy_from_user(dst
, src
->data
, maxlen
)) {
1853 return ERR_PTR(-EFAULT
);
1859 static struct super_block
*nfs4_get_sb(struct file_system_type
*fs_type
,
1860 int flags
, const char *dev_name
, void *raw_data
)
1863 struct nfs_server
*server
;
1864 struct super_block
*s
;
1865 struct nfs4_mount_data
*data
= raw_data
;
1869 dprintk("%s: missing data argument\n", __FUNCTION__
);
1870 return ERR_PTR(-EINVAL
);
1872 if (data
->version
<= 0 || data
->version
> NFS4_MOUNT_VERSION
) {
1873 dprintk("%s: bad mount version\n", __FUNCTION__
);
1874 return ERR_PTR(-EINVAL
);
1877 server
= kmalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1879 return ERR_PTR(-ENOMEM
);
1880 memset(server
, 0, sizeof(struct nfs_server
));
1881 /* Zero out the NFS state stuff */
1882 init_nfsv4_state(server
);
1883 server
->client
= server
->client_sys
= server
->client_acl
= ERR_PTR(-EINVAL
);
1885 p
= nfs_copy_user_string(NULL
, &data
->hostname
, 256);
1888 server
->hostname
= p
;
1890 p
= nfs_copy_user_string(NULL
, &data
->mnt_path
, 1024);
1893 server
->mnt_path
= p
;
1895 p
= nfs_copy_user_string(server
->ip_addr
, &data
->client_addr
,
1896 sizeof(server
->ip_addr
) - 1);
1900 /* We now require that the mount process passes the remote address */
1901 if (data
->host_addrlen
!= sizeof(server
->addr
)) {
1902 s
= ERR_PTR(-EINVAL
);
1905 if (copy_from_user(&server
->addr
, data
->host_addr
, sizeof(server
->addr
))) {
1906 s
= ERR_PTR(-EFAULT
);
1909 if (server
->addr
.sin_family
!= AF_INET
||
1910 server
->addr
.sin_addr
.s_addr
== INADDR_ANY
) {
1911 dprintk("%s: mount program didn't pass remote IP address!\n",
1913 s
= ERR_PTR(-EINVAL
);
1917 /* Fire up rpciod if not yet running */
1918 s
= ERR_PTR(rpciod_up());
1920 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1921 __FUNCTION__
, PTR_ERR(s
));
1925 s
= sget(fs_type
, nfs4_compare_super
, nfs_set_super
, server
);
1927 if (IS_ERR(s
) || s
->s_root
)
1932 error
= nfs4_fill_super(s
, data
, flags
& MS_VERBOSE
? 1 : 0);
1934 up_write(&s
->s_umount
);
1935 deactivate_super(s
);
1936 return ERR_PTR(error
);
1938 s
->s_flags
|= MS_ACTIVE
;
1941 s
= (struct super_block
*)p
;
1943 if (server
->mnt_path
)
1944 kfree(server
->mnt_path
);
1945 if (server
->hostname
)
1946 kfree(server
->hostname
);
1951 static void nfs4_kill_super(struct super_block
*sb
)
1953 struct nfs_server
*server
= NFS_SB(sb
);
1955 nfs_return_all_delegations(sb
);
1956 kill_anon_super(sb
);
1958 nfs4_renewd_prepare_shutdown(server
);
1960 if (server
->client
!= NULL
&& !IS_ERR(server
->client
))
1961 rpc_shutdown_client(server
->client
);
1962 rpciod_down(); /* release rpciod */
1964 destroy_nfsv4_state(server
);
1966 if (server
->hostname
!= NULL
)
1967 kfree(server
->hostname
);
1971 static struct file_system_type nfs4_fs_type
= {
1972 .owner
= THIS_MODULE
,
1974 .get_sb
= nfs4_get_sb
,
1975 .kill_sb
= nfs4_kill_super
,
1976 .fs_flags
= FS_ODD_RENAME
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
1979 #define nfs4_init_once(nfsi) \
1981 INIT_LIST_HEAD(&(nfsi)->open_states); \
1982 nfsi->delegation = NULL; \
1983 nfsi->delegation_state = 0; \
1984 init_rwsem(&nfsi->rwsem); \
1986 #define register_nfs4fs() register_filesystem(&nfs4_fs_type)
1987 #define unregister_nfs4fs() unregister_filesystem(&nfs4_fs_type)
1989 #define nfs4_init_once(nfsi) \
1991 #define register_nfs4fs() (0)
1992 #define unregister_nfs4fs()
1995 extern int nfs_init_nfspagecache(void);
1996 extern void nfs_destroy_nfspagecache(void);
1997 extern int nfs_init_readpagecache(void);
1998 extern void nfs_destroy_readpagecache(void);
1999 extern int nfs_init_writepagecache(void);
2000 extern void nfs_destroy_writepagecache(void);
2001 #ifdef CONFIG_NFS_DIRECTIO
2002 extern int nfs_init_directcache(void);
2003 extern void nfs_destroy_directcache(void);
2006 static kmem_cache_t
* nfs_inode_cachep
;
2008 static struct inode
*nfs_alloc_inode(struct super_block
*sb
)
2010 struct nfs_inode
*nfsi
;
2011 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, SLAB_KERNEL
);
2015 nfsi
->cache_validity
= 0UL;
2016 #ifdef CONFIG_NFS_V3_ACL
2017 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
2018 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
2020 #ifdef CONFIG_NFS_V4
2021 nfsi
->nfs4_acl
= NULL
;
2022 #endif /* CONFIG_NFS_V4 */
2023 return &nfsi
->vfs_inode
;
2026 static void nfs_destroy_inode(struct inode
*inode
)
2028 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
2031 static void init_once(void * foo
, kmem_cache_t
* cachep
, unsigned long flags
)
2033 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
2035 if ((flags
& (SLAB_CTOR_VERIFY
|SLAB_CTOR_CONSTRUCTOR
)) ==
2036 SLAB_CTOR_CONSTRUCTOR
) {
2037 inode_init_once(&nfsi
->vfs_inode
);
2038 spin_lock_init(&nfsi
->req_lock
);
2039 INIT_LIST_HEAD(&nfsi
->dirty
);
2040 INIT_LIST_HEAD(&nfsi
->commit
);
2041 INIT_LIST_HEAD(&nfsi
->open_files
);
2042 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
2043 atomic_set(&nfsi
->data_updates
, 0);
2047 nfs4_init_once(nfsi
);
2051 static int nfs_init_inodecache(void)
2053 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
2054 sizeof(struct nfs_inode
),
2055 0, SLAB_RECLAIM_ACCOUNT
,
2057 if (nfs_inode_cachep
== NULL
)
2063 static void nfs_destroy_inodecache(void)
2065 if (kmem_cache_destroy(nfs_inode_cachep
))
2066 printk(KERN_INFO
"nfs_inode_cache: not all structures were freed\n");
2072 static int __init
init_nfs_fs(void)
2076 err
= nfs_init_nfspagecache();
2080 err
= nfs_init_inodecache();
2084 err
= nfs_init_readpagecache();
2088 err
= nfs_init_writepagecache();
2092 #ifdef CONFIG_NFS_DIRECTIO
2093 err
= nfs_init_directcache();
2098 #ifdef CONFIG_PROC_FS
2099 rpc_proc_register(&nfs_rpcstat
);
2101 err
= register_filesystem(&nfs_fs_type
);
2104 if ((err
= register_nfs4fs()) != 0)
2108 #ifdef CONFIG_PROC_FS
2109 rpc_proc_unregister("nfs");
2111 nfs_destroy_writepagecache();
2112 #ifdef CONFIG_NFS_DIRECTIO
2114 nfs_destroy_directcache();
2117 nfs_destroy_readpagecache();
2119 nfs_destroy_inodecache();
2121 nfs_destroy_nfspagecache();
2126 static void __exit
exit_nfs_fs(void)
2128 #ifdef CONFIG_NFS_DIRECTIO
2129 nfs_destroy_directcache();
2131 nfs_destroy_writepagecache();
2132 nfs_destroy_readpagecache();
2133 nfs_destroy_inodecache();
2134 nfs_destroy_nfspagecache();
2135 #ifdef CONFIG_PROC_FS
2136 rpc_proc_unregister("nfs");
2138 unregister_filesystem(&nfs_fs_type
);
2139 unregister_nfs4fs();
2142 /* Not quite true; I just maintain it */
2143 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2144 MODULE_LICENSE("GPL");
2146 module_init(init_nfs_fs
)
2147 module_exit(exit_nfs_fs
)