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
;
361 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
, unsigned int timeo
, unsigned int retrans
)
363 to
->to_initval
= timeo
* HZ
/ 10;
364 to
->to_retries
= retrans
;
371 to
->to_initval
= 60 * HZ
;
372 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
373 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
374 to
->to_increment
= to
->to_initval
;
375 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
376 to
->to_exponential
= 0;
381 to
->to_initval
= 11 * HZ
/ 10;
382 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
383 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
384 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
385 to
->to_exponential
= 1;
391 * Create an RPC client handle.
393 static struct rpc_clnt
*
394 nfs_create_client(struct nfs_server
*server
, const struct nfs_mount_data
*data
)
396 struct rpc_timeout timeparms
;
397 struct rpc_xprt
*xprt
= NULL
;
398 struct rpc_clnt
*clnt
= NULL
;
399 int proto
= (data
->flags
& NFS_MOUNT_TCP
) ? IPPROTO_TCP
: IPPROTO_UDP
;
401 nfs_init_timeout_values(&timeparms
, proto
, data
->timeo
, data
->retrans
);
403 /* create transport and client */
404 xprt
= xprt_create_proto(proto
, &server
->addr
, &timeparms
);
406 dprintk("%s: cannot create RPC transport. Error = %ld\n",
407 __FUNCTION__
, PTR_ERR(xprt
));
408 return (struct rpc_clnt
*)xprt
;
410 clnt
= rpc_create_client(xprt
, server
->hostname
, &nfs_program
,
411 server
->rpc_ops
->version
, data
->pseudoflavor
);
413 dprintk("%s: cannot create RPC client. Error = %ld\n",
414 __FUNCTION__
, PTR_ERR(xprt
));
419 clnt
->cl_softrtry
= 1;
429 * The way this works is that the mount process passes a structure
430 * in the data argument which contains the server's IP address
431 * and the root file handle obtained from the server's mount
432 * daemon. We stash these away in the private superblock fields.
435 nfs_fill_super(struct super_block
*sb
, struct nfs_mount_data
*data
, int silent
)
437 struct nfs_server
*server
;
438 rpc_authflavor_t authflavor
;
441 sb
->s_blocksize_bits
= 0;
444 sb
->s_blocksize
= nfs_block_size(data
->bsize
, &sb
->s_blocksize_bits
);
446 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
448 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
449 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
451 server
->acregmin
= data
->acregmin
*HZ
;
452 server
->acregmax
= data
->acregmax
*HZ
;
453 server
->acdirmin
= data
->acdirmin
*HZ
;
454 server
->acdirmax
= data
->acdirmax
*HZ
;
456 /* Start lockd here, before we might error out */
457 if (!(server
->flags
& NFS_MOUNT_NONLM
))
460 server
->namelen
= data
->namlen
;
461 server
->hostname
= kmalloc(strlen(data
->hostname
) + 1, GFP_KERNEL
);
462 if (!server
->hostname
)
464 strcpy(server
->hostname
, data
->hostname
);
466 /* Check NFS protocol revision and initialize RPC op vector
467 * and file handle pool. */
469 if (server
->flags
& NFS_MOUNT_VER3
) {
470 server
->rpc_ops
= &nfs_v3_clientops
;
471 server
->caps
|= NFS_CAP_READDIRPLUS
;
473 server
->rpc_ops
= &nfs_v2_clientops
;
476 server
->rpc_ops
= &nfs_v2_clientops
;
479 /* Fill in pseudoflavor for mount version < 5 */
480 if (!(data
->flags
& NFS_MOUNT_SECFLAVOUR
))
481 data
->pseudoflavor
= RPC_AUTH_UNIX
;
482 authflavor
= data
->pseudoflavor
; /* save for sb_init() */
483 /* XXX maybe we want to add a server->pseudoflavor field */
485 /* Create RPC client handles */
486 server
->client
= nfs_create_client(server
, data
);
487 if (IS_ERR(server
->client
))
488 return PTR_ERR(server
->client
);
489 /* RFC 2623, sec 2.3.2 */
490 if (authflavor
!= RPC_AUTH_UNIX
) {
491 struct rpc_auth
*auth
;
493 server
->client_sys
= rpc_clone_client(server
->client
);
494 if (IS_ERR(server
->client_sys
))
495 return PTR_ERR(server
->client_sys
);
496 auth
= rpcauth_create(RPC_AUTH_UNIX
, server
->client_sys
);
498 return PTR_ERR(auth
);
500 atomic_inc(&server
->client
->cl_count
);
501 server
->client_sys
= server
->client
;
503 if (server
->flags
& NFS_MOUNT_VER3
) {
504 #ifdef CONFIG_NFS_V3_ACL
505 if (!(server
->flags
& NFS_MOUNT_NOACL
)) {
506 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
507 /* No errors! Assume that Sun nfsacls are supported */
508 if (!IS_ERR(server
->client_acl
))
509 server
->caps
|= NFS_CAP_ACLS
;
512 server
->flags
&= ~NFS_MOUNT_NOACL
;
513 #endif /* CONFIG_NFS_V3_ACL */
515 * The VFS shouldn't apply the umask to mode bits. We will
516 * do so ourselves when necessary.
518 sb
->s_flags
|= MS_POSIXACL
;
519 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
520 server
->namelen
= NFS3_MAXNAMLEN
;
523 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
524 server
->namelen
= NFS2_MAXNAMLEN
;
527 sb
->s_op
= &nfs_sops
;
528 return nfs_sb_init(sb
, authflavor
);
532 nfs_statfs(struct super_block
*sb
, struct kstatfs
*buf
)
534 struct nfs_server
*server
= NFS_SB(sb
);
535 unsigned char blockbits
;
536 unsigned long blockres
;
537 struct nfs_fh
*rootfh
= NFS_FH(sb
->s_root
->d_inode
);
538 struct nfs_fattr fattr
;
539 struct nfs_fsstat res
= {
546 error
= server
->rpc_ops
->statfs(server
, rootfh
, &res
);
547 buf
->f_type
= NFS_SUPER_MAGIC
;
552 * Current versions of glibc do not correctly handle the
553 * case where f_frsize != f_bsize. Eventually we want to
554 * report the value of wtmult in this field.
556 buf
->f_frsize
= sb
->s_blocksize
;
559 * On most *nix systems, f_blocks, f_bfree, and f_bavail
560 * are reported in units of f_frsize. Linux hasn't had
561 * an f_frsize field in its statfs struct until recently,
562 * thus historically Linux's sys_statfs reports these
563 * fields in units of f_bsize.
565 buf
->f_bsize
= sb
->s_blocksize
;
566 blockbits
= sb
->s_blocksize_bits
;
567 blockres
= (1 << blockbits
) - 1;
568 buf
->f_blocks
= (res
.tbytes
+ blockres
) >> blockbits
;
569 buf
->f_bfree
= (res
.fbytes
+ blockres
) >> blockbits
;
570 buf
->f_bavail
= (res
.abytes
+ blockres
) >> blockbits
;
572 buf
->f_files
= res
.tfiles
;
573 buf
->f_ffree
= res
.afiles
;
575 buf
->f_namelen
= server
->namelen
;
582 printk(KERN_WARNING
"nfs_statfs: statfs error = %d\n", -error
);
583 buf
->f_bsize
= buf
->f_blocks
= buf
->f_bfree
= buf
->f_bavail
= -1;
588 static int nfs_show_options(struct seq_file
*m
, struct vfsmount
*mnt
)
590 static struct proc_nfs_info
{
595 { NFS_MOUNT_SOFT
, ",soft", ",hard" },
596 { NFS_MOUNT_INTR
, ",intr", "" },
597 { NFS_MOUNT_POSIX
, ",posix", "" },
598 { NFS_MOUNT_NOCTO
, ",nocto", "" },
599 { NFS_MOUNT_NOAC
, ",noac", "" },
600 { NFS_MOUNT_NONLM
, ",nolock", ",lock" },
601 { NFS_MOUNT_NOACL
, ",noacl", "" },
604 struct proc_nfs_info
*nfs_infop
;
605 struct nfs_server
*nfss
= NFS_SB(mnt
->mnt_sb
);
609 seq_printf(m
, ",v%d", nfss
->rpc_ops
->version
);
610 seq_printf(m
, ",rsize=%d", nfss
->rsize
);
611 seq_printf(m
, ",wsize=%d", nfss
->wsize
);
612 if (nfss
->acregmin
!= 3*HZ
)
613 seq_printf(m
, ",acregmin=%d", nfss
->acregmin
/HZ
);
614 if (nfss
->acregmax
!= 60*HZ
)
615 seq_printf(m
, ",acregmax=%d", nfss
->acregmax
/HZ
);
616 if (nfss
->acdirmin
!= 30*HZ
)
617 seq_printf(m
, ",acdirmin=%d", nfss
->acdirmin
/HZ
);
618 if (nfss
->acdirmax
!= 60*HZ
)
619 seq_printf(m
, ",acdirmax=%d", nfss
->acdirmax
/HZ
);
620 for (nfs_infop
= nfs_info
; nfs_infop
->flag
; nfs_infop
++) {
621 if (nfss
->flags
& nfs_infop
->flag
)
622 seq_puts(m
, nfs_infop
->str
);
624 seq_puts(m
, nfs_infop
->nostr
);
626 switch (nfss
->client
->cl_xprt
->prot
) {
634 snprintf(buf
, sizeof(buf
), "%u", nfss
->client
->cl_xprt
->prot
);
637 seq_printf(m
, ",proto=%s", proto
);
638 seq_puts(m
, ",addr=");
639 seq_escape(m
, nfss
->hostname
, " \t\n\\");
644 * Invalidate the local caches
647 nfs_zap_caches(struct inode
*inode
)
649 struct nfs_inode
*nfsi
= NFS_I(inode
);
650 int mode
= inode
->i_mode
;
652 spin_lock(&inode
->i_lock
);
654 NFS_ATTRTIMEO(inode
) = NFS_MINATTRTIMEO(inode
);
655 NFS_ATTRTIMEO_UPDATE(inode
) = jiffies
;
657 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
658 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
659 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
661 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
663 spin_unlock(&inode
->i_lock
);
666 static void nfs_zap_acl_cache(struct inode
*inode
)
668 void (*clear_acl_cache
)(struct inode
*);
670 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
671 if (clear_acl_cache
!= NULL
)
672 clear_acl_cache(inode
);
673 spin_lock(&inode
->i_lock
);
674 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
675 spin_unlock(&inode
->i_lock
);
679 * Invalidate, but do not unhash, the inode
682 nfs_invalidate_inode(struct inode
*inode
)
684 umode_t save_mode
= inode
->i_mode
;
686 make_bad_inode(inode
);
687 inode
->i_mode
= save_mode
;
688 nfs_zap_caches(inode
);
691 struct nfs_find_desc
{
693 struct nfs_fattr
*fattr
;
697 * In NFSv3 we can have 64bit inode numbers. In order to support
698 * this, and re-exported directories (also seen in NFSv2)
699 * we are forced to allow 2 different inodes to have the same
703 nfs_find_actor(struct inode
*inode
, void *opaque
)
705 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
706 struct nfs_fh
*fh
= desc
->fh
;
707 struct nfs_fattr
*fattr
= desc
->fattr
;
709 if (NFS_FILEID(inode
) != fattr
->fileid
)
711 if (nfs_compare_fh(NFS_FH(inode
), fh
))
713 if (is_bad_inode(inode
) || NFS_STALE(inode
))
719 nfs_init_locked(struct inode
*inode
, void *opaque
)
721 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
722 struct nfs_fattr
*fattr
= desc
->fattr
;
724 NFS_FILEID(inode
) = fattr
->fileid
;
725 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
729 /* Don't use READDIRPLUS on directories that we believe are too large */
730 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
733 * This is our front-end to iget that looks up inodes by file handle
734 * instead of inode number.
737 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
739 struct nfs_find_desc desc
= {
743 struct inode
*inode
= NULL
;
746 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
750 printk("NFS: Buggy server - nlink == 0!\n");
754 hash
= nfs_fattr_to_ino_t(fattr
);
756 if (!(inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
)))
759 if (inode
->i_state
& I_NEW
) {
760 struct nfs_inode
*nfsi
= NFS_I(inode
);
762 /* We set i_ino for the few things that still rely on it,
766 /* We can't support update_atime(), since the server will reset it */
767 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
768 inode
->i_mode
= fattr
->mode
;
769 /* Why so? Because we want revalidate for devices/FIFOs, and
770 * that's precisely what we have in nfs_file_inode_operations.
772 inode
->i_op
= NFS_SB(sb
)->rpc_ops
->file_inode_ops
;
773 if (S_ISREG(inode
->i_mode
)) {
774 inode
->i_fop
= &nfs_file_operations
;
775 inode
->i_data
.a_ops
= &nfs_file_aops
;
776 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
777 } else if (S_ISDIR(inode
->i_mode
)) {
778 inode
->i_op
= NFS_SB(sb
)->rpc_ops
->dir_inode_ops
;
779 inode
->i_fop
= &nfs_dir_operations
;
780 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
781 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
782 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_FLAGS(inode
));
783 } else if (S_ISLNK(inode
->i_mode
))
784 inode
->i_op
= &nfs_symlink_inode_operations
;
786 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
788 nfsi
->read_cache_jiffies
= fattr
->time_start
;
789 nfsi
->last_updated
= jiffies
;
790 inode
->i_atime
= fattr
->atime
;
791 inode
->i_mtime
= fattr
->mtime
;
792 inode
->i_ctime
= fattr
->ctime
;
793 if (fattr
->valid
& NFS_ATTR_FATTR_V4
)
794 nfsi
->change_attr
= fattr
->change_attr
;
795 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
796 inode
->i_nlink
= fattr
->nlink
;
797 inode
->i_uid
= fattr
->uid
;
798 inode
->i_gid
= fattr
->gid
;
799 if (fattr
->valid
& (NFS_ATTR_FATTR_V3
| NFS_ATTR_FATTR_V4
)) {
801 * report the blocks in 512byte units
803 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
804 inode
->i_blksize
= inode
->i_sb
->s_blocksize
;
806 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
807 inode
->i_blksize
= fattr
->du
.nfs2
.blocksize
;
809 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
810 nfsi
->attrtimeo_timestamp
= jiffies
;
811 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
812 nfsi
->cache_access
.cred
= NULL
;
814 unlock_new_inode(inode
);
816 nfs_refresh_inode(inode
, fattr
);
817 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
819 (long long)NFS_FILEID(inode
),
820 atomic_read(&inode
->i_count
));
826 printk("nfs_fhget: iget failed\n");
830 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET)
833 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
835 struct inode
*inode
= dentry
->d_inode
;
836 struct nfs_fattr fattr
;
839 if (attr
->ia_valid
& ATTR_SIZE
) {
840 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
841 attr
->ia_valid
&= ~ATTR_SIZE
;
844 /* Optimization: if the end result is no change, don't RPC */
845 attr
->ia_valid
&= NFS_VALID_ATTRS
;
846 if (attr
->ia_valid
== 0)
850 nfs_begin_data_update(inode
);
851 /* Write all dirty data if we're changing file permissions or size */
852 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
|ATTR_SIZE
)) != 0) {
853 if (filemap_fdatawrite(inode
->i_mapping
) == 0)
854 filemap_fdatawait(inode
->i_mapping
);
858 * Return any delegations if we're going to change ACLs
860 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
861 nfs_inode_return_delegation(inode
);
862 error
= NFS_PROTO(inode
)->setattr(dentry
, &fattr
, attr
);
864 nfs_refresh_inode(inode
, &fattr
);
865 nfs_end_data_update(inode
);
871 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
872 * @inode: pointer to struct inode
873 * @attr: pointer to struct iattr
875 * Note: we do this in the *proc.c in order to ensure that
876 * it works for things like exclusive creates too.
878 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
880 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
881 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
882 int mode
= attr
->ia_mode
& S_IALLUGO
;
883 mode
|= inode
->i_mode
& ~S_IALLUGO
;
884 inode
->i_mode
= mode
;
886 if ((attr
->ia_valid
& ATTR_UID
) != 0)
887 inode
->i_uid
= attr
->ia_uid
;
888 if ((attr
->ia_valid
& ATTR_GID
) != 0)
889 inode
->i_gid
= attr
->ia_gid
;
890 spin_lock(&inode
->i_lock
);
891 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
892 spin_unlock(&inode
->i_lock
);
894 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
895 inode
->i_size
= attr
->ia_size
;
896 vmtruncate(inode
, attr
->ia_size
);
900 static int nfs_wait_schedule(void *word
)
902 if (signal_pending(current
))
909 * Wait for the inode to get unlocked.
911 static int nfs_wait_on_inode(struct inode
*inode
)
913 struct rpc_clnt
*clnt
= NFS_CLIENT(inode
);
914 struct nfs_inode
*nfsi
= NFS_I(inode
);
918 rpc_clnt_sigmask(clnt
, &oldmask
);
919 error
= wait_on_bit_lock(&nfsi
->flags
, NFS_INO_REVALIDATING
,
920 nfs_wait_schedule
, TASK_INTERRUPTIBLE
);
921 rpc_clnt_sigunmask(clnt
, &oldmask
);
926 static void nfs_wake_up_inode(struct inode
*inode
)
928 struct nfs_inode
*nfsi
= NFS_I(inode
);
930 clear_bit(NFS_INO_REVALIDATING
, &nfsi
->flags
);
931 smp_mb__after_clear_bit();
932 wake_up_bit(&nfsi
->flags
, NFS_INO_REVALIDATING
);
935 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
937 struct inode
*inode
= dentry
->d_inode
;
938 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
941 if (__IS_FLG(inode
, MS_NOATIME
))
943 else if (__IS_FLG(inode
, MS_NODIRATIME
) && S_ISDIR(inode
->i_mode
))
945 /* We may force a getattr if the user cares about atime */
947 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
949 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
951 generic_fillattr(inode
, stat
);
955 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, struct rpc_cred
*cred
)
957 struct nfs_open_context
*ctx
;
959 ctx
= (struct nfs_open_context
*)kmalloc(sizeof(*ctx
), GFP_KERNEL
);
961 atomic_set(&ctx
->count
, 1);
962 ctx
->dentry
= dget(dentry
);
963 ctx
->cred
= get_rpccred(cred
);
965 ctx
->lockowner
= current
->files
;
972 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
975 atomic_inc(&ctx
->count
);
979 void put_nfs_open_context(struct nfs_open_context
*ctx
)
981 if (atomic_dec_and_test(&ctx
->count
)) {
982 if (!list_empty(&ctx
->list
)) {
983 struct inode
*inode
= ctx
->dentry
->d_inode
;
984 spin_lock(&inode
->i_lock
);
985 list_del(&ctx
->list
);
986 spin_unlock(&inode
->i_lock
);
988 if (ctx
->state
!= NULL
)
989 nfs4_close_state(ctx
->state
, ctx
->mode
);
990 if (ctx
->cred
!= NULL
)
991 put_rpccred(ctx
->cred
);
998 * Ensure that mmap has a recent RPC credential for use when writing out
1001 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
1003 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1004 struct nfs_inode
*nfsi
= NFS_I(inode
);
1006 filp
->private_data
= get_nfs_open_context(ctx
);
1007 spin_lock(&inode
->i_lock
);
1008 list_add(&ctx
->list
, &nfsi
->open_files
);
1009 spin_unlock(&inode
->i_lock
);
1013 * Given an inode, search for an open context with the desired characteristics
1015 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, int mode
)
1017 struct nfs_inode
*nfsi
= NFS_I(inode
);
1018 struct nfs_open_context
*pos
, *ctx
= NULL
;
1020 spin_lock(&inode
->i_lock
);
1021 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
1022 if (cred
!= NULL
&& pos
->cred
!= cred
)
1024 if ((pos
->mode
& mode
) == mode
) {
1025 ctx
= get_nfs_open_context(pos
);
1029 spin_unlock(&inode
->i_lock
);
1033 void nfs_file_clear_open_context(struct file
*filp
)
1035 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1036 struct nfs_open_context
*ctx
= (struct nfs_open_context
*)filp
->private_data
;
1039 filp
->private_data
= NULL
;
1040 spin_lock(&inode
->i_lock
);
1041 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
1042 spin_unlock(&inode
->i_lock
);
1043 put_nfs_open_context(ctx
);
1048 * These allocate and release file read/write context information.
1050 int nfs_open(struct inode
*inode
, struct file
*filp
)
1052 struct nfs_open_context
*ctx
;
1053 struct rpc_cred
*cred
;
1055 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
1057 return PTR_ERR(cred
);
1058 ctx
= alloc_nfs_open_context(filp
->f_dentry
, cred
);
1062 ctx
->mode
= filp
->f_mode
;
1063 nfs_file_set_open_context(filp
, ctx
);
1064 put_nfs_open_context(ctx
);
1068 int nfs_release(struct inode
*inode
, struct file
*filp
)
1070 nfs_file_clear_open_context(filp
);
1075 * This function is called whenever some part of NFS notices that
1076 * the cached attributes have to be refreshed.
1079 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1081 int status
= -ESTALE
;
1082 struct nfs_fattr fattr
;
1083 struct nfs_inode
*nfsi
= NFS_I(inode
);
1084 unsigned long verifier
;
1085 unsigned long cache_validity
;
1087 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
1088 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
1091 if (!inode
|| is_bad_inode(inode
))
1093 if (NFS_STALE(inode
))
1096 status
= nfs_wait_on_inode(inode
);
1099 if (NFS_STALE(inode
)) {
1101 /* Do we trust the cached ESTALE? */
1102 if (NFS_ATTRTIMEO(inode
) != 0) {
1103 if (nfsi
->cache_validity
& (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ATIME
)) {
1110 /* Protect against RPC races by saving the change attribute */
1111 verifier
= nfs_save_change_attribute(inode
);
1112 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), &fattr
);
1114 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
1116 (long long)NFS_FILEID(inode
), status
);
1117 if (status
== -ESTALE
) {
1118 nfs_zap_caches(inode
);
1119 if (!S_ISDIR(inode
->i_mode
))
1120 set_bit(NFS_INO_STALE
, &NFS_FLAGS(inode
));
1125 spin_lock(&inode
->i_lock
);
1126 status
= nfs_update_inode(inode
, &fattr
, verifier
);
1128 spin_unlock(&inode
->i_lock
);
1129 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
1131 (long long)NFS_FILEID(inode
), status
);
1134 cache_validity
= nfsi
->cache_validity
;
1135 nfsi
->cache_validity
&= ~NFS_INO_REVAL_PAGECACHE
;
1138 * We may need to keep the attributes marked as invalid if
1139 * we raced with nfs_end_attr_update().
1141 if (time_after_eq(verifier
, nfsi
->cache_change_attribute
))
1142 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ATIME
);
1143 spin_unlock(&inode
->i_lock
);
1145 nfs_revalidate_mapping(inode
, inode
->i_mapping
);
1147 if (cache_validity
& NFS_INO_INVALID_ACL
)
1148 nfs_zap_acl_cache(inode
);
1150 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
1152 (long long)NFS_FILEID(inode
));
1155 nfs_wake_up_inode(inode
);
1162 int nfs_attribute_timeout(struct inode
*inode
)
1164 struct nfs_inode
*nfsi
= NFS_I(inode
);
1166 if (nfs_have_delegation(inode
, FMODE_READ
))
1168 return time_after(jiffies
, nfsi
->read_cache_jiffies
+nfsi
->attrtimeo
);
1172 * nfs_revalidate_inode - Revalidate the inode attributes
1173 * @server - pointer to nfs_server struct
1174 * @inode - pointer to inode struct
1176 * Updates inode attribute information by retrieving the data from the server.
1178 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1180 if (!(NFS_I(inode
)->cache_validity
& (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
))
1181 && !nfs_attribute_timeout(inode
))
1182 return NFS_STALE(inode
) ? -ESTALE
: 0;
1183 return __nfs_revalidate_inode(server
, inode
);
1187 * nfs_revalidate_mapping - Revalidate the pagecache
1188 * @inode - pointer to host inode
1189 * @mapping - pointer to mapping
1191 void nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1193 struct nfs_inode
*nfsi
= NFS_I(inode
);
1195 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
) {
1196 if (S_ISREG(inode
->i_mode
)) {
1197 if (filemap_fdatawrite(mapping
) == 0)
1198 filemap_fdatawait(mapping
);
1201 invalidate_inode_pages2(mapping
);
1203 spin_lock(&inode
->i_lock
);
1204 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1205 if (S_ISDIR(inode
->i_mode
)) {
1206 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1207 /* This ensures we revalidate child dentries */
1208 nfsi
->cache_change_attribute
= jiffies
;
1210 spin_unlock(&inode
->i_lock
);
1212 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
1214 (long long)NFS_FILEID(inode
));
1219 * nfs_begin_data_update
1220 * @inode - pointer to inode
1221 * Declare that a set of operations will update file data on the server
1223 void nfs_begin_data_update(struct inode
*inode
)
1225 atomic_inc(&NFS_I(inode
)->data_updates
);
1229 * nfs_end_data_update
1230 * @inode - pointer to inode
1231 * Declare end of the operations that will update file data
1232 * This will mark the inode as immediately needing revalidation
1233 * of its attribute cache.
1235 void nfs_end_data_update(struct inode
*inode
)
1237 struct nfs_inode
*nfsi
= NFS_I(inode
);
1239 if (!nfs_have_delegation(inode
, FMODE_READ
)) {
1240 /* Directories and symlinks: invalidate page cache */
1241 if (S_ISDIR(inode
->i_mode
) || S_ISLNK(inode
->i_mode
)) {
1242 spin_lock(&inode
->i_lock
);
1243 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1244 spin_unlock(&inode
->i_lock
);
1247 nfsi
->cache_change_attribute
= jiffies
;
1248 atomic_dec(&nfsi
->data_updates
);
1252 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1253 * @inode - pointer to inode
1254 * @fattr - updated attributes
1256 * Verifies the attribute cache. If we have just changed the attributes,
1257 * so that fattr carries weak cache consistency data, then it may
1258 * also update the ctime/mtime/change_attribute.
1260 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1262 struct nfs_inode
*nfsi
= NFS_I(inode
);
1263 loff_t cur_size
, new_isize
;
1267 /* Are we in the process of updating data on the server? */
1268 data_unstable
= nfs_caches_unstable(inode
);
1270 if (fattr
->valid
& NFS_ATTR_FATTR_V4
) {
1271 if ((fattr
->valid
& NFS_ATTR_PRE_CHANGE
) != 0
1272 && nfsi
->change_attr
== fattr
->pre_change_attr
)
1273 nfsi
->change_attr
= fattr
->change_attr
;
1274 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1275 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1277 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1281 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0) {
1285 /* Has the inode gone and changed behind our back? */
1286 if (nfsi
->fileid
!= fattr
->fileid
1287 || (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1291 cur_size
= i_size_read(inode
);
1292 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1294 /* If we have atomic WCC data, we may update some attributes */
1295 if ((fattr
->valid
& NFS_ATTR_WCC
) != 0) {
1296 if (timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
))
1297 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1298 if (timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
))
1299 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1302 /* Verify a few of the more important attributes */
1303 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1304 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1306 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1308 if (cur_size
!= new_isize
) {
1309 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1310 if (nfsi
->npages
== 0)
1311 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1314 /* Have any file permissions changed? */
1315 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)
1316 || inode
->i_uid
!= fattr
->uid
1317 || inode
->i_gid
!= fattr
->gid
)
1318 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1320 /* Has the link count changed? */
1321 if (inode
->i_nlink
!= fattr
->nlink
)
1322 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1324 if (!timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1325 nfsi
->cache_validity
|= NFS_INO_INVALID_ATIME
;
1327 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1332 * nfs_refresh_inode - try to update the inode attribute cache
1333 * @inode - pointer to inode
1334 * @fattr - updated attributes
1336 * Check that an RPC call that returned attributes has not overlapped with
1337 * other recent updates of the inode metadata, then decide whether it is
1338 * safe to do a full update of the inode attributes, or whether just to
1339 * call nfs_check_inode_attributes.
1341 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1343 struct nfs_inode
*nfsi
= NFS_I(inode
);
1346 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1348 spin_lock(&inode
->i_lock
);
1349 nfsi
->cache_validity
&= ~NFS_INO_REVAL_PAGECACHE
;
1350 if (nfs_verify_change_attribute(inode
, fattr
->time_start
))
1351 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ATIME
);
1352 if (time_after(fattr
->time_start
, nfsi
->last_updated
))
1353 status
= nfs_update_inode(inode
, fattr
, fattr
->time_start
);
1355 status
= nfs_check_inode_attributes(inode
, fattr
);
1357 spin_unlock(&inode
->i_lock
);
1362 * nfs_post_op_update_inode - try to update the inode attribute cache
1363 * @inode - pointer to inode
1364 * @fattr - updated attributes
1366 * After an operation that has changed the inode metadata, mark the
1367 * attribute cache as being invalid, then try to update it.
1369 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1371 struct nfs_inode
*nfsi
= NFS_I(inode
);
1374 spin_lock(&inode
->i_lock
);
1375 if (unlikely((fattr
->valid
& NFS_ATTR_FATTR
) == 0)) {
1376 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
;
1379 status
= nfs_update_inode(inode
, fattr
, fattr
->time_start
);
1380 if (time_after_eq(fattr
->time_start
, nfsi
->cache_change_attribute
))
1381 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ATIME
|NFS_INO_REVAL_PAGECACHE
);
1382 nfsi
->cache_change_attribute
= jiffies
;
1384 spin_unlock(&inode
->i_lock
);
1389 * Many nfs protocol calls return the new file attributes after
1390 * an operation. Here we update the inode to reflect the state
1391 * of the server's inode.
1393 * This is a bit tricky because we have to make sure all dirty pages
1394 * have been sent off to the server before calling invalidate_inode_pages.
1395 * To make sure no other process adds more write requests while we try
1396 * our best to flush them, we make them sleep during the attribute refresh.
1398 * A very similar scenario holds for the dir cache.
1400 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
, unsigned long verifier
)
1402 struct nfs_inode
*nfsi
= NFS_I(inode
);
1403 loff_t cur_isize
, new_isize
;
1404 unsigned int invalid
= 0;
1407 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1408 __FUNCTION__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1409 atomic_read(&inode
->i_count
), fattr
->valid
);
1411 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1414 if (nfsi
->fileid
!= fattr
->fileid
) {
1415 printk(KERN_ERR
"%s: inode number mismatch\n"
1416 "expected (%s/0x%Lx), got (%s/0x%Lx)\n",
1418 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1419 inode
->i_sb
->s_id
, (long long)fattr
->fileid
);
1424 * Make sure the inode's type hasn't changed.
1426 if ((inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1430 * Update the read time so we don't revalidate too often.
1432 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1433 nfsi
->last_updated
= jiffies
;
1435 /* Are we racing with known updates of the metadata on the server? */
1436 data_unstable
= ! (nfs_verify_change_attribute(inode
, verifier
) ||
1437 (nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
));
1439 /* Check if our cached file size is stale */
1440 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1441 cur_isize
= i_size_read(inode
);
1442 if (new_isize
!= cur_isize
) {
1443 /* Do we perhaps have any outstanding writes? */
1444 if (nfsi
->npages
== 0) {
1445 /* No, but did we race with nfs_end_data_update()? */
1446 if (time_after_eq(verifier
, nfsi
->cache_change_attribute
)) {
1447 inode
->i_size
= new_isize
;
1448 invalid
|= NFS_INO_INVALID_DATA
;
1450 invalid
|= NFS_INO_INVALID_ATTR
;
1451 } else if (new_isize
> cur_isize
) {
1452 inode
->i_size
= new_isize
;
1453 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1455 dprintk("NFS: isize change on server for file %s/%ld\n",
1456 inode
->i_sb
->s_id
, inode
->i_ino
);
1459 /* Check if the mtime agrees */
1460 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1461 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1462 dprintk("NFS: mtime change on server for file %s/%ld\n",
1463 inode
->i_sb
->s_id
, inode
->i_ino
);
1465 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1468 if ((fattr
->valid
& NFS_ATTR_FATTR_V4
)
1469 && nfsi
->change_attr
!= fattr
->change_attr
) {
1470 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1471 inode
->i_sb
->s_id
, inode
->i_ino
);
1472 nfsi
->change_attr
= fattr
->change_attr
;
1474 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1477 /* If ctime has changed we should definitely clear access+acl caches */
1478 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1480 invalid
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1481 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1483 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1485 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
) ||
1486 inode
->i_uid
!= fattr
->uid
||
1487 inode
->i_gid
!= fattr
->gid
)
1488 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1490 inode
->i_mode
= fattr
->mode
;
1491 inode
->i_nlink
= fattr
->nlink
;
1492 inode
->i_uid
= fattr
->uid
;
1493 inode
->i_gid
= fattr
->gid
;
1495 if (fattr
->valid
& (NFS_ATTR_FATTR_V3
| NFS_ATTR_FATTR_V4
)) {
1497 * report the blocks in 512byte units
1499 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1500 inode
->i_blksize
= inode
->i_sb
->s_blocksize
;
1502 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1503 inode
->i_blksize
= fattr
->du
.nfs2
.blocksize
;
1506 /* Update attrtimeo value if we're out of the unstable period */
1507 if (invalid
& NFS_INO_INVALID_ATTR
) {
1508 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1509 nfsi
->attrtimeo_timestamp
= jiffies
;
1510 } else if (time_after(jiffies
, nfsi
->attrtimeo_timestamp
+nfsi
->attrtimeo
)) {
1511 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1512 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1513 nfsi
->attrtimeo_timestamp
= jiffies
;
1515 /* Don't invalidate the data if we were to blame */
1516 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1517 || S_ISLNK(inode
->i_mode
)))
1518 invalid
&= ~NFS_INO_INVALID_DATA
;
1519 if (!nfs_have_delegation(inode
, FMODE_READ
))
1520 nfsi
->cache_validity
|= invalid
;
1525 * Big trouble! The inode has become a different object.
1528 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1529 __FUNCTION__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1532 * No need to worry about unhashing the dentry, as the
1533 * lookup validation will know that the inode is bad.
1534 * (But we fall through to invalidate the caches.)
1536 nfs_invalidate_inode(inode
);
1538 set_bit(NFS_INO_STALE
, &NFS_FLAGS(inode
));
1543 * File system information
1546 static int nfs_set_super(struct super_block
*s
, void *data
)
1548 s
->s_fs_info
= data
;
1549 return set_anon_super(s
, data
);
1552 static int nfs_compare_super(struct super_block
*sb
, void *data
)
1554 struct nfs_server
*server
= data
;
1555 struct nfs_server
*old
= NFS_SB(sb
);
1557 if (old
->addr
.sin_addr
.s_addr
!= server
->addr
.sin_addr
.s_addr
)
1559 if (old
->addr
.sin_port
!= server
->addr
.sin_port
)
1561 return !nfs_compare_fh(&old
->fh
, &server
->fh
);
1564 static struct super_block
*nfs_get_sb(struct file_system_type
*fs_type
,
1565 int flags
, const char *dev_name
, void *raw_data
)
1568 struct nfs_server
*server
= NULL
;
1569 struct super_block
*s
;
1570 struct nfs_fh
*root
;
1571 struct nfs_mount_data
*data
= raw_data
;
1573 s
= ERR_PTR(-EINVAL
);
1575 dprintk("%s: missing data argument\n", __FUNCTION__
);
1578 if (data
->version
<= 0 || data
->version
> NFS_MOUNT_VERSION
) {
1579 dprintk("%s: bad mount version\n", __FUNCTION__
);
1582 switch (data
->version
) {
1588 if (data
->flags
& NFS_MOUNT_VER3
) {
1589 dprintk("%s: mount structure version %d does not support NFSv3\n",
1594 data
->root
.size
= NFS2_FHSIZE
;
1595 memcpy(data
->root
.data
, data
->old_root
.data
, NFS2_FHSIZE
);
1597 if (data
->flags
& NFS_MOUNT_SECFLAVOUR
) {
1598 dprintk("%s: mount structure version %d does not support strong security\n",
1604 memset(data
->context
, 0, sizeof(data
->context
));
1606 #ifndef CONFIG_NFS_V3
1607 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1608 s
= ERR_PTR(-EPROTONOSUPPORT
);
1609 if (data
->flags
& NFS_MOUNT_VER3
) {
1610 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__
);
1613 #endif /* CONFIG_NFS_V3 */
1615 s
= ERR_PTR(-ENOMEM
);
1616 server
= kmalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1619 memset(server
, 0, sizeof(struct nfs_server
));
1620 /* Zero out the NFS state stuff */
1621 init_nfsv4_state(server
);
1622 server
->client
= server
->client_sys
= server
->client_acl
= ERR_PTR(-EINVAL
);
1625 if (data
->flags
& NFS_MOUNT_VER3
)
1626 root
->size
= data
->root
.size
;
1628 root
->size
= NFS2_FHSIZE
;
1629 s
= ERR_PTR(-EINVAL
);
1630 if (root
->size
> sizeof(root
->data
)) {
1631 dprintk("%s: invalid root filehandle\n", __FUNCTION__
);
1634 memcpy(root
->data
, data
->root
.data
, root
->size
);
1636 /* We now require that the mount process passes the remote address */
1637 memcpy(&server
->addr
, &data
->addr
, sizeof(server
->addr
));
1638 if (server
->addr
.sin_addr
.s_addr
== INADDR_ANY
) {
1639 dprintk("%s: mount program didn't pass remote address!\n",
1644 /* Fire up rpciod if not yet running */
1645 s
= ERR_PTR(rpciod_up());
1647 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1648 __FUNCTION__
, PTR_ERR(s
));
1652 s
= sget(fs_type
, nfs_compare_super
, nfs_set_super
, server
);
1653 if (IS_ERR(s
) || s
->s_root
)
1654 goto out_rpciod_down
;
1658 error
= nfs_fill_super(s
, data
, flags
& MS_VERBOSE
? 1 : 0);
1660 up_write(&s
->s_umount
);
1661 deactivate_super(s
);
1662 return ERR_PTR(error
);
1664 s
->s_flags
|= MS_ACTIVE
;
1673 static void nfs_kill_super(struct super_block
*s
)
1675 struct nfs_server
*server
= NFS_SB(s
);
1679 if (!IS_ERR(server
->client
))
1680 rpc_shutdown_client(server
->client
);
1681 if (!IS_ERR(server
->client_sys
))
1682 rpc_shutdown_client(server
->client_sys
);
1683 if (!IS_ERR(server
->client_acl
))
1684 rpc_shutdown_client(server
->client_acl
);
1686 if (!(server
->flags
& NFS_MOUNT_NONLM
))
1687 lockd_down(); /* release rpc.lockd */
1689 rpciod_down(); /* release rpciod */
1691 kfree(server
->hostname
);
1695 static struct file_system_type nfs_fs_type
= {
1696 .owner
= THIS_MODULE
,
1698 .get_sb
= nfs_get_sb
,
1699 .kill_sb
= nfs_kill_super
,
1700 .fs_flags
= FS_ODD_RENAME
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
1703 #ifdef CONFIG_NFS_V4
1705 static void nfs4_clear_inode(struct inode
*);
1708 static struct super_operations nfs4_sops
= {
1709 .alloc_inode
= nfs_alloc_inode
,
1710 .destroy_inode
= nfs_destroy_inode
,
1711 .write_inode
= nfs_write_inode
,
1712 .delete_inode
= nfs_delete_inode
,
1713 .statfs
= nfs_statfs
,
1714 .clear_inode
= nfs4_clear_inode
,
1715 .umount_begin
= nfs_umount_begin
,
1716 .show_options
= nfs_show_options
,
1720 * Clean out any remaining NFSv4 state that might be left over due
1721 * to open() calls that passed nfs_atomic_lookup, but failed to call
1724 static void nfs4_clear_inode(struct inode
*inode
)
1726 struct nfs_inode
*nfsi
= NFS_I(inode
);
1728 /* If we are holding a delegation, return it! */
1729 nfs_inode_return_delegation(inode
);
1730 /* First call standard NFS clear_inode() code */
1731 nfs_clear_inode(inode
);
1732 /* Now clear out any remaining state */
1733 while (!list_empty(&nfsi
->open_states
)) {
1734 struct nfs4_state
*state
;
1736 state
= list_entry(nfsi
->open_states
.next
,
1739 dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
1742 (long long)NFS_FILEID(inode
),
1744 BUG_ON(atomic_read(&state
->count
) != 1);
1745 nfs4_close_state(state
, state
->state
);
1750 static int nfs4_fill_super(struct super_block
*sb
, struct nfs4_mount_data
*data
, int silent
)
1752 struct nfs_server
*server
;
1753 struct nfs4_client
*clp
= NULL
;
1754 struct rpc_xprt
*xprt
= NULL
;
1755 struct rpc_clnt
*clnt
= NULL
;
1756 struct rpc_timeout timeparms
;
1757 rpc_authflavor_t authflavour
;
1760 sb
->s_blocksize_bits
= 0;
1761 sb
->s_blocksize
= 0;
1762 server
= NFS_SB(sb
);
1763 if (data
->rsize
!= 0)
1764 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1765 if (data
->wsize
!= 0)
1766 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1767 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
1768 server
->caps
= NFS_CAP_ATOMIC_OPEN
;
1770 server
->acregmin
= data
->acregmin
*HZ
;
1771 server
->acregmax
= data
->acregmax
*HZ
;
1772 server
->acdirmin
= data
->acdirmin
*HZ
;
1773 server
->acdirmax
= data
->acdirmax
*HZ
;
1775 server
->rpc_ops
= &nfs_v4_clientops
;
1777 nfs_init_timeout_values(&timeparms
, data
->proto
, data
->timeo
, data
->retrans
);
1779 clp
= nfs4_get_client(&server
->addr
.sin_addr
);
1781 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__
);
1785 /* Now create transport and client */
1786 authflavour
= RPC_AUTH_UNIX
;
1787 if (data
->auth_flavourlen
!= 0) {
1788 if (data
->auth_flavourlen
!= 1) {
1789 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1790 __FUNCTION__
, data
->auth_flavourlen
);
1794 if (copy_from_user(&authflavour
, data
->auth_flavours
, sizeof(authflavour
))) {
1800 down_write(&clp
->cl_sem
);
1801 if (IS_ERR(clp
->cl_rpcclient
)) {
1802 xprt
= xprt_create_proto(data
->proto
, &server
->addr
, &timeparms
);
1804 up_write(&clp
->cl_sem
);
1805 err
= PTR_ERR(xprt
);
1806 dprintk("%s: cannot create RPC transport. Error = %d\n",
1810 clnt
= rpc_create_client(xprt
, server
->hostname
, &nfs_program
,
1811 server
->rpc_ops
->version
, authflavour
);
1813 up_write(&clp
->cl_sem
);
1814 err
= PTR_ERR(clnt
);
1815 dprintk("%s: cannot create RPC client. Error = %d\n",
1820 clnt
->cl_softrtry
= 1;
1821 clnt
->cl_chatty
= 1;
1822 clp
->cl_rpcclient
= clnt
;
1823 clp
->cl_cred
= rpcauth_lookupcred(clnt
->cl_auth
, 0);
1824 if (IS_ERR(clp
->cl_cred
)) {
1825 up_write(&clp
->cl_sem
);
1826 err
= PTR_ERR(clp
->cl_cred
);
1827 clp
->cl_cred
= NULL
;
1830 memcpy(clp
->cl_ipaddr
, server
->ip_addr
, sizeof(clp
->cl_ipaddr
));
1833 if (list_empty(&clp
->cl_superblocks
)) {
1834 err
= nfs4_init_client(clp
);
1836 up_write(&clp
->cl_sem
);
1840 list_add_tail(&server
->nfs4_siblings
, &clp
->cl_superblocks
);
1841 clnt
= rpc_clone_client(clp
->cl_rpcclient
);
1843 server
->nfs4_state
= clp
;
1844 up_write(&clp
->cl_sem
);
1848 err
= PTR_ERR(clnt
);
1849 dprintk("%s: cannot create RPC client. Error = %d\n",
1854 server
->client
= clnt
;
1856 if (server
->nfs4_state
->cl_idmap
== NULL
) {
1857 dprintk("%s: failed to create idmapper.\n", __FUNCTION__
);
1861 if (clnt
->cl_auth
->au_flavor
!= authflavour
) {
1862 struct rpc_auth
*auth
;
1864 auth
= rpcauth_create(authflavour
, clnt
);
1866 dprintk("%s: couldn't create credcache!\n", __FUNCTION__
);
1867 return PTR_ERR(auth
);
1871 sb
->s_time_gran
= 1;
1873 sb
->s_op
= &nfs4_sops
;
1874 err
= nfs_sb_init(sb
, authflavour
);
1879 nfs4_put_client(clp
);
1883 static int nfs4_compare_super(struct super_block
*sb
, void *data
)
1885 struct nfs_server
*server
= data
;
1886 struct nfs_server
*old
= NFS_SB(sb
);
1888 if (strcmp(server
->hostname
, old
->hostname
) != 0)
1890 if (strcmp(server
->mnt_path
, old
->mnt_path
) != 0)
1896 nfs_copy_user_string(char *dst
, struct nfs_string
*src
, int maxlen
)
1901 return ERR_PTR(-EINVAL
);
1902 if (src
->len
< maxlen
)
1905 p
= dst
= kmalloc(maxlen
+ 1, GFP_KERNEL
);
1907 return ERR_PTR(-ENOMEM
);
1909 if (copy_from_user(dst
, src
->data
, maxlen
)) {
1911 return ERR_PTR(-EFAULT
);
1917 static struct super_block
*nfs4_get_sb(struct file_system_type
*fs_type
,
1918 int flags
, const char *dev_name
, void *raw_data
)
1921 struct nfs_server
*server
;
1922 struct super_block
*s
;
1923 struct nfs4_mount_data
*data
= raw_data
;
1927 dprintk("%s: missing data argument\n", __FUNCTION__
);
1928 return ERR_PTR(-EINVAL
);
1930 if (data
->version
<= 0 || data
->version
> NFS4_MOUNT_VERSION
) {
1931 dprintk("%s: bad mount version\n", __FUNCTION__
);
1932 return ERR_PTR(-EINVAL
);
1935 server
= kmalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1937 return ERR_PTR(-ENOMEM
);
1938 memset(server
, 0, sizeof(struct nfs_server
));
1939 /* Zero out the NFS state stuff */
1940 init_nfsv4_state(server
);
1941 server
->client
= server
->client_sys
= server
->client_acl
= ERR_PTR(-EINVAL
);
1943 p
= nfs_copy_user_string(NULL
, &data
->hostname
, 256);
1946 server
->hostname
= p
;
1948 p
= nfs_copy_user_string(NULL
, &data
->mnt_path
, 1024);
1951 server
->mnt_path
= p
;
1953 p
= nfs_copy_user_string(server
->ip_addr
, &data
->client_addr
,
1954 sizeof(server
->ip_addr
) - 1);
1958 /* We now require that the mount process passes the remote address */
1959 if (data
->host_addrlen
!= sizeof(server
->addr
)) {
1960 s
= ERR_PTR(-EINVAL
);
1963 if (copy_from_user(&server
->addr
, data
->host_addr
, sizeof(server
->addr
))) {
1964 s
= ERR_PTR(-EFAULT
);
1967 if (server
->addr
.sin_family
!= AF_INET
||
1968 server
->addr
.sin_addr
.s_addr
== INADDR_ANY
) {
1969 dprintk("%s: mount program didn't pass remote IP address!\n",
1971 s
= ERR_PTR(-EINVAL
);
1975 /* Fire up rpciod if not yet running */
1976 s
= ERR_PTR(rpciod_up());
1978 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1979 __FUNCTION__
, PTR_ERR(s
));
1983 s
= sget(fs_type
, nfs4_compare_super
, nfs_set_super
, server
);
1985 if (IS_ERR(s
) || s
->s_root
)
1990 error
= nfs4_fill_super(s
, data
, flags
& MS_VERBOSE
? 1 : 0);
1992 up_write(&s
->s_umount
);
1993 deactivate_super(s
);
1994 return ERR_PTR(error
);
1996 s
->s_flags
|= MS_ACTIVE
;
1999 s
= (struct super_block
*)p
;
2001 kfree(server
->mnt_path
);
2002 kfree(server
->hostname
);
2007 static void nfs4_kill_super(struct super_block
*sb
)
2009 struct nfs_server
*server
= NFS_SB(sb
);
2011 nfs_return_all_delegations(sb
);
2012 kill_anon_super(sb
);
2014 nfs4_renewd_prepare_shutdown(server
);
2016 if (server
->client
!= NULL
&& !IS_ERR(server
->client
))
2017 rpc_shutdown_client(server
->client
);
2018 rpciod_down(); /* release rpciod */
2020 destroy_nfsv4_state(server
);
2022 kfree(server
->hostname
);
2026 static struct file_system_type nfs4_fs_type
= {
2027 .owner
= THIS_MODULE
,
2029 .get_sb
= nfs4_get_sb
,
2030 .kill_sb
= nfs4_kill_super
,
2031 .fs_flags
= FS_ODD_RENAME
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
2034 #define nfs4_init_once(nfsi) \
2036 INIT_LIST_HEAD(&(nfsi)->open_states); \
2037 nfsi->delegation = NULL; \
2038 nfsi->delegation_state = 0; \
2039 init_rwsem(&nfsi->rwsem); \
2041 #define register_nfs4fs() register_filesystem(&nfs4_fs_type)
2042 #define unregister_nfs4fs() unregister_filesystem(&nfs4_fs_type)
2044 #define nfs4_init_once(nfsi) \
2046 #define register_nfs4fs() (0)
2047 #define unregister_nfs4fs()
2050 extern int nfs_init_nfspagecache(void);
2051 extern void nfs_destroy_nfspagecache(void);
2052 extern int nfs_init_readpagecache(void);
2053 extern void nfs_destroy_readpagecache(void);
2054 extern int nfs_init_writepagecache(void);
2055 extern void nfs_destroy_writepagecache(void);
2056 #ifdef CONFIG_NFS_DIRECTIO
2057 extern int nfs_init_directcache(void);
2058 extern void nfs_destroy_directcache(void);
2061 static kmem_cache_t
* nfs_inode_cachep
;
2063 static struct inode
*nfs_alloc_inode(struct super_block
*sb
)
2065 struct nfs_inode
*nfsi
;
2066 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, SLAB_KERNEL
);
2070 nfsi
->cache_validity
= 0UL;
2071 #ifdef CONFIG_NFS_V3_ACL
2072 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
2073 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
2075 #ifdef CONFIG_NFS_V4
2076 nfsi
->nfs4_acl
= NULL
;
2077 #endif /* CONFIG_NFS_V4 */
2078 return &nfsi
->vfs_inode
;
2081 static void nfs_destroy_inode(struct inode
*inode
)
2083 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
2086 static void init_once(void * foo
, kmem_cache_t
* cachep
, unsigned long flags
)
2088 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
2090 if ((flags
& (SLAB_CTOR_VERIFY
|SLAB_CTOR_CONSTRUCTOR
)) ==
2091 SLAB_CTOR_CONSTRUCTOR
) {
2092 inode_init_once(&nfsi
->vfs_inode
);
2093 spin_lock_init(&nfsi
->req_lock
);
2094 INIT_LIST_HEAD(&nfsi
->dirty
);
2095 INIT_LIST_HEAD(&nfsi
->commit
);
2096 INIT_LIST_HEAD(&nfsi
->open_files
);
2097 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
2098 atomic_set(&nfsi
->data_updates
, 0);
2102 nfs4_init_once(nfsi
);
2106 static int nfs_init_inodecache(void)
2108 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
2109 sizeof(struct nfs_inode
),
2110 0, SLAB_RECLAIM_ACCOUNT
,
2112 if (nfs_inode_cachep
== NULL
)
2118 static void nfs_destroy_inodecache(void)
2120 if (kmem_cache_destroy(nfs_inode_cachep
))
2121 printk(KERN_INFO
"nfs_inode_cache: not all structures were freed\n");
2127 static int __init
init_nfs_fs(void)
2131 err
= nfs_init_nfspagecache();
2135 err
= nfs_init_inodecache();
2139 err
= nfs_init_readpagecache();
2143 err
= nfs_init_writepagecache();
2147 #ifdef CONFIG_NFS_DIRECTIO
2148 err
= nfs_init_directcache();
2153 #ifdef CONFIG_PROC_FS
2154 rpc_proc_register(&nfs_rpcstat
);
2156 err
= register_filesystem(&nfs_fs_type
);
2159 if ((err
= register_nfs4fs()) != 0)
2163 #ifdef CONFIG_PROC_FS
2164 rpc_proc_unregister("nfs");
2166 nfs_destroy_writepagecache();
2167 #ifdef CONFIG_NFS_DIRECTIO
2169 nfs_destroy_directcache();
2172 nfs_destroy_readpagecache();
2174 nfs_destroy_inodecache();
2176 nfs_destroy_nfspagecache();
2181 static void __exit
exit_nfs_fs(void)
2183 #ifdef CONFIG_NFS_DIRECTIO
2184 nfs_destroy_directcache();
2186 nfs_destroy_writepagecache();
2187 nfs_destroy_readpagecache();
2188 nfs_destroy_inodecache();
2189 nfs_destroy_nfspagecache();
2190 #ifdef CONFIG_PROC_FS
2191 rpc_proc_unregister("nfs");
2193 unregister_filesystem(&nfs_fs_type
);
2194 unregister_nfs4fs();
2197 /* Not quite true; I just maintain it */
2198 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2199 MODULE_LICENSE("GPL");
2201 module_init(init_nfs_fs
)
2202 module_exit(exit_nfs_fs
)