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>
44 #include "delegation.h"
46 #define NFSDBG_FACILITY NFSDBG_VFS
47 #define NFS_PARANOIA 1
49 /* Maximum number of readahead requests
50 * FIXME: this should really be a sysctl so that users may tune it to suit
51 * their needs. People that do NFS over a slow network, might for
52 * instance want to reduce it to something closer to 1 for improved
53 * interactive response.
55 #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
57 static void nfs_invalidate_inode(struct inode
*);
58 static int nfs_update_inode(struct inode
*, struct nfs_fattr
*);
60 static struct inode
*nfs_alloc_inode(struct super_block
*sb
);
61 static void nfs_destroy_inode(struct inode
*);
62 static int nfs_write_inode(struct inode
*,int);
63 static void nfs_delete_inode(struct inode
*);
64 static void nfs_clear_inode(struct inode
*);
65 static void nfs_umount_begin(struct super_block
*);
66 static int nfs_statfs(struct super_block
*, struct kstatfs
*);
67 static int nfs_show_options(struct seq_file
*, struct vfsmount
*);
68 static void nfs_zap_acl_cache(struct inode
*);
70 static struct rpc_program nfs_program
;
72 static struct super_operations nfs_sops
= {
73 .alloc_inode
= nfs_alloc_inode
,
74 .destroy_inode
= nfs_destroy_inode
,
75 .write_inode
= nfs_write_inode
,
76 .delete_inode
= nfs_delete_inode
,
78 .clear_inode
= nfs_clear_inode
,
79 .umount_begin
= nfs_umount_begin
,
80 .show_options
= nfs_show_options
,
86 static struct rpc_stat nfs_rpcstat
= {
87 .program
= &nfs_program
89 static struct rpc_version
* nfs_version
[] = {
93 #if defined(CONFIG_NFS_V3)
95 #elif defined(CONFIG_NFS_V4)
98 #if defined(CONFIG_NFS_V4)
103 static struct rpc_program nfs_program
= {
105 .number
= NFS_PROGRAM
,
106 .nrvers
= sizeof(nfs_version
) / sizeof(nfs_version
[0]),
107 .version
= nfs_version
,
108 .stats
= &nfs_rpcstat
,
109 .pipe_dir_name
= "/nfs",
112 #ifdef CONFIG_NFS_V3_ACL
113 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
114 static struct rpc_version
* nfsacl_version
[] = {
115 [3] = &nfsacl_version3
,
118 struct rpc_program nfsacl_program
= {
120 .number
= NFS_ACL_PROGRAM
,
121 .nrvers
= sizeof(nfsacl_version
) / sizeof(nfsacl_version
[0]),
122 .version
= nfsacl_version
,
123 .stats
= &nfsacl_rpcstat
,
125 #endif /* CONFIG_NFS_V3_ACL */
127 static inline unsigned long
128 nfs_fattr_to_ino_t(struct nfs_fattr
*fattr
)
130 return nfs_fileid_to_ino_t(fattr
->fileid
);
134 nfs_write_inode(struct inode
*inode
, int sync
)
136 int flags
= sync
? FLUSH_WAIT
: 0;
139 ret
= nfs_commit_inode(inode
, flags
);
146 nfs_delete_inode(struct inode
* inode
)
148 dprintk("NFS: delete_inode(%s/%ld)\n", inode
->i_sb
->s_id
, inode
->i_ino
);
150 truncate_inode_pages(&inode
->i_data
, 0);
154 * The following should never happen...
156 if (nfs_have_writebacks(inode
)) {
157 printk(KERN_ERR
"nfs_delete_inode: inode %ld has pending RPC requests\n", inode
->i_ino
);
164 nfs_clear_inode(struct inode
*inode
)
166 struct nfs_inode
*nfsi
= NFS_I(inode
);
167 struct rpc_cred
*cred
;
170 BUG_ON (!list_empty(&nfsi
->open_files
));
171 nfs_zap_acl_cache(inode
);
172 cred
= nfsi
->cache_access
.cred
;
175 BUG_ON(atomic_read(&nfsi
->data_updates
) != 0);
179 nfs_umount_begin(struct super_block
*sb
)
181 struct rpc_clnt
*rpc
= NFS_SB(sb
)->client
;
183 /* -EIO all pending I/O */
185 rpc_killall_tasks(rpc
);
186 rpc
= NFS_SB(sb
)->client_acl
;
188 rpc_killall_tasks(rpc
);
192 static inline unsigned long
193 nfs_block_bits(unsigned long bsize
, unsigned char *nrbitsp
)
195 /* make sure blocksize is a power of two */
196 if ((bsize
& (bsize
- 1)) || nrbitsp
) {
197 unsigned char nrbits
;
199 for (nrbits
= 31; nrbits
&& !(bsize
& (1 << nrbits
)); nrbits
--)
210 * Calculate the number of 512byte blocks used.
212 static inline unsigned long
213 nfs_calc_block_size(u64 tsize
)
215 loff_t used
= (tsize
+ 511) >> 9;
216 return (used
> ULONG_MAX
) ? ULONG_MAX
: used
;
220 * Compute and set NFS server blocksize
222 static inline unsigned long
223 nfs_block_size(unsigned long bsize
, unsigned char *nrbitsp
)
225 if (bsize
< NFS_MIN_FILE_IO_SIZE
)
226 bsize
= NFS_DEF_FILE_IO_SIZE
;
227 else if (bsize
>= NFS_MAX_FILE_IO_SIZE
)
228 bsize
= NFS_MAX_FILE_IO_SIZE
;
230 return nfs_block_bits(bsize
, nrbitsp
);
234 * Obtain the root inode of the file system.
236 static struct inode
*
237 nfs_get_root(struct super_block
*sb
, struct nfs_fh
*rootfh
, struct nfs_fsinfo
*fsinfo
)
239 struct nfs_server
*server
= NFS_SB(sb
);
243 error
= server
->rpc_ops
->getroot(server
, rootfh
, fsinfo
);
245 dprintk("nfs_get_root: getattr error = %d\n", -error
);
246 return ERR_PTR(error
);
249 rooti
= nfs_fhget(sb
, rootfh
, fsinfo
->fattr
);
251 return ERR_PTR(-ENOMEM
);
256 * Do NFS version-independent mount processing, and sanity checking
259 nfs_sb_init(struct super_block
*sb
, rpc_authflavor_t authflavor
)
261 struct nfs_server
*server
;
262 struct inode
*root_inode
;
263 struct nfs_fattr fattr
;
264 struct nfs_fsinfo fsinfo
= {
267 struct nfs_pathconf pathinfo
= {
270 int no_root_error
= 0;
271 unsigned long max_rpc_payload
;
273 /* We probably want something more informative here */
274 snprintf(sb
->s_id
, sizeof(sb
->s_id
), "%x:%x", MAJOR(sb
->s_dev
), MINOR(sb
->s_dev
));
278 sb
->s_magic
= NFS_SUPER_MAGIC
;
280 root_inode
= nfs_get_root(sb
, &server
->fh
, &fsinfo
);
281 /* Did getting the root inode fail? */
282 if (IS_ERR(root_inode
)) {
283 no_root_error
= PTR_ERR(root_inode
);
286 sb
->s_root
= d_alloc_root(root_inode
);
288 no_root_error
= -ENOMEM
;
291 sb
->s_root
->d_op
= server
->rpc_ops
->dentry_ops
;
293 /* Get some general file system info */
294 if (server
->namelen
== 0 &&
295 server
->rpc_ops
->pathconf(server
, &server
->fh
, &pathinfo
) >= 0)
296 server
->namelen
= pathinfo
.max_namelen
;
297 /* Work out a lot of parameters */
298 if (server
->rsize
== 0)
299 server
->rsize
= nfs_block_size(fsinfo
.rtpref
, NULL
);
300 if (server
->wsize
== 0)
301 server
->wsize
= nfs_block_size(fsinfo
.wtpref
, NULL
);
303 if (fsinfo
.rtmax
>= 512 && server
->rsize
> fsinfo
.rtmax
)
304 server
->rsize
= nfs_block_size(fsinfo
.rtmax
, NULL
);
305 if (fsinfo
.wtmax
>= 512 && server
->wsize
> fsinfo
.wtmax
)
306 server
->wsize
= nfs_block_size(fsinfo
.wtmax
, NULL
);
308 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
309 if (server
->rsize
> max_rpc_payload
)
310 server
->rsize
= max_rpc_payload
;
311 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
312 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
313 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
315 if (server
->wsize
> max_rpc_payload
)
316 server
->wsize
= max_rpc_payload
;
317 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
318 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
319 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
321 if (sb
->s_blocksize
== 0)
322 sb
->s_blocksize
= nfs_block_bits(server
->wsize
,
323 &sb
->s_blocksize_bits
);
324 server
->wtmult
= nfs_block_bits(fsinfo
.wtmult
, NULL
);
326 server
->dtsize
= nfs_block_size(fsinfo
.dtpref
, NULL
);
327 if (server
->dtsize
> PAGE_CACHE_SIZE
)
328 server
->dtsize
= PAGE_CACHE_SIZE
;
329 if (server
->dtsize
> server
->rsize
)
330 server
->dtsize
= server
->rsize
;
332 if (server
->flags
& NFS_MOUNT_NOAC
) {
333 server
->acregmin
= server
->acregmax
= 0;
334 server
->acdirmin
= server
->acdirmax
= 0;
335 sb
->s_flags
|= MS_SYNCHRONOUS
;
337 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
339 sb
->s_maxbytes
= fsinfo
.maxfilesize
;
340 if (sb
->s_maxbytes
> MAX_LFS_FILESIZE
)
341 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
343 server
->client
->cl_intr
= (server
->flags
& NFS_MOUNT_INTR
) ? 1 : 0;
344 server
->client
->cl_softrtry
= (server
->flags
& NFS_MOUNT_SOFT
) ? 1 : 0;
346 /* We're airborne Set socket buffersize */
347 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
349 /* Yargs. It didn't work out. */
351 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error
);
352 if (!IS_ERR(root_inode
))
354 return no_root_error
;
357 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
, unsigned int timeo
, unsigned int retrans
)
359 to
->to_initval
= timeo
* HZ
/ 10;
360 to
->to_retries
= retrans
;
367 to
->to_initval
= 60 * HZ
;
368 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
369 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
370 to
->to_increment
= to
->to_initval
;
371 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
372 to
->to_exponential
= 0;
377 to
->to_initval
= 11 * HZ
/ 10;
378 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
379 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
380 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
381 to
->to_exponential
= 1;
387 * Create an RPC client handle.
389 static struct rpc_clnt
*
390 nfs_create_client(struct nfs_server
*server
, const struct nfs_mount_data
*data
)
392 struct rpc_timeout timeparms
;
393 struct rpc_xprt
*xprt
= NULL
;
394 struct rpc_clnt
*clnt
= NULL
;
395 int proto
= (data
->flags
& NFS_MOUNT_TCP
) ? IPPROTO_TCP
: IPPROTO_UDP
;
397 nfs_init_timeout_values(&timeparms
, proto
, data
->timeo
, data
->retrans
);
399 /* create transport and client */
400 xprt
= xprt_create_proto(proto
, &server
->addr
, &timeparms
);
402 dprintk("%s: cannot create RPC transport. Error = %ld\n",
403 __FUNCTION__
, PTR_ERR(xprt
));
404 return (struct rpc_clnt
*)xprt
;
406 clnt
= rpc_create_client(xprt
, server
->hostname
, &nfs_program
,
407 server
->rpc_ops
->version
, data
->pseudoflavor
);
409 dprintk("%s: cannot create RPC client. Error = %ld\n",
410 __FUNCTION__
, PTR_ERR(xprt
));
415 clnt
->cl_softrtry
= 1;
425 * The way this works is that the mount process passes a structure
426 * in the data argument which contains the server's IP address
427 * and the root file handle obtained from the server's mount
428 * daemon. We stash these away in the private superblock fields.
431 nfs_fill_super(struct super_block
*sb
, struct nfs_mount_data
*data
, int silent
)
433 struct nfs_server
*server
;
434 rpc_authflavor_t authflavor
;
437 sb
->s_blocksize_bits
= 0;
440 sb
->s_blocksize
= nfs_block_size(data
->bsize
, &sb
->s_blocksize_bits
);
442 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
444 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
445 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
447 server
->acregmin
= data
->acregmin
*HZ
;
448 server
->acregmax
= data
->acregmax
*HZ
;
449 server
->acdirmin
= data
->acdirmin
*HZ
;
450 server
->acdirmax
= data
->acdirmax
*HZ
;
452 /* Start lockd here, before we might error out */
453 if (!(server
->flags
& NFS_MOUNT_NONLM
))
456 server
->namelen
= data
->namlen
;
457 server
->hostname
= kmalloc(strlen(data
->hostname
) + 1, GFP_KERNEL
);
458 if (!server
->hostname
)
460 strcpy(server
->hostname
, data
->hostname
);
462 /* Check NFS protocol revision and initialize RPC op vector
463 * and file handle pool. */
465 if (server
->flags
& NFS_MOUNT_VER3
) {
466 server
->rpc_ops
= &nfs_v3_clientops
;
467 server
->caps
|= NFS_CAP_READDIRPLUS
;
469 server
->rpc_ops
= &nfs_v2_clientops
;
472 server
->rpc_ops
= &nfs_v2_clientops
;
475 /* Fill in pseudoflavor for mount version < 5 */
476 if (!(data
->flags
& NFS_MOUNT_SECFLAVOUR
))
477 data
->pseudoflavor
= RPC_AUTH_UNIX
;
478 authflavor
= data
->pseudoflavor
; /* save for sb_init() */
479 /* XXX maybe we want to add a server->pseudoflavor field */
481 /* Create RPC client handles */
482 server
->client
= nfs_create_client(server
, data
);
483 if (IS_ERR(server
->client
))
484 return PTR_ERR(server
->client
);
485 /* RFC 2623, sec 2.3.2 */
486 if (authflavor
!= RPC_AUTH_UNIX
) {
487 struct rpc_auth
*auth
;
489 server
->client_sys
= rpc_clone_client(server
->client
);
490 if (IS_ERR(server
->client_sys
))
491 return PTR_ERR(server
->client_sys
);
492 auth
= rpcauth_create(RPC_AUTH_UNIX
, server
->client_sys
);
494 return PTR_ERR(auth
);
496 atomic_inc(&server
->client
->cl_count
);
497 server
->client_sys
= server
->client
;
499 if (server
->flags
& NFS_MOUNT_VER3
) {
500 #ifdef CONFIG_NFS_V3_ACL
501 if (!(server
->flags
& NFS_MOUNT_NOACL
)) {
502 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
503 /* No errors! Assume that Sun nfsacls are supported */
504 if (!IS_ERR(server
->client_acl
))
505 server
->caps
|= NFS_CAP_ACLS
;
508 server
->flags
&= ~NFS_MOUNT_NOACL
;
509 #endif /* CONFIG_NFS_V3_ACL */
511 * The VFS shouldn't apply the umask to mode bits. We will
512 * do so ourselves when necessary.
514 sb
->s_flags
|= MS_POSIXACL
;
515 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
516 server
->namelen
= NFS3_MAXNAMLEN
;
519 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
520 server
->namelen
= NFS2_MAXNAMLEN
;
523 sb
->s_op
= &nfs_sops
;
524 return nfs_sb_init(sb
, authflavor
);
528 nfs_statfs(struct super_block
*sb
, struct kstatfs
*buf
)
530 struct nfs_server
*server
= NFS_SB(sb
);
531 unsigned char blockbits
;
532 unsigned long blockres
;
533 struct nfs_fh
*rootfh
= NFS_FH(sb
->s_root
->d_inode
);
534 struct nfs_fattr fattr
;
535 struct nfs_fsstat res
= {
542 error
= server
->rpc_ops
->statfs(server
, rootfh
, &res
);
543 buf
->f_type
= NFS_SUPER_MAGIC
;
548 * Current versions of glibc do not correctly handle the
549 * case where f_frsize != f_bsize. Eventually we want to
550 * report the value of wtmult in this field.
552 buf
->f_frsize
= sb
->s_blocksize
;
555 * On most *nix systems, f_blocks, f_bfree, and f_bavail
556 * are reported in units of f_frsize. Linux hasn't had
557 * an f_frsize field in its statfs struct until recently,
558 * thus historically Linux's sys_statfs reports these
559 * fields in units of f_bsize.
561 buf
->f_bsize
= sb
->s_blocksize
;
562 blockbits
= sb
->s_blocksize_bits
;
563 blockres
= (1 << blockbits
) - 1;
564 buf
->f_blocks
= (res
.tbytes
+ blockres
) >> blockbits
;
565 buf
->f_bfree
= (res
.fbytes
+ blockres
) >> blockbits
;
566 buf
->f_bavail
= (res
.abytes
+ blockres
) >> blockbits
;
568 buf
->f_files
= res
.tfiles
;
569 buf
->f_ffree
= res
.afiles
;
571 buf
->f_namelen
= server
->namelen
;
577 dprintk("%s: statfs error = %d\n", __FUNCTION__
, -error
);
578 buf
->f_bsize
= buf
->f_blocks
= buf
->f_bfree
= buf
->f_bavail
= -1;
583 static int nfs_show_options(struct seq_file
*m
, struct vfsmount
*mnt
)
585 static struct proc_nfs_info
{
590 { NFS_MOUNT_SOFT
, ",soft", ",hard" },
591 { NFS_MOUNT_INTR
, ",intr", "" },
592 { NFS_MOUNT_POSIX
, ",posix", "" },
593 { NFS_MOUNT_NOCTO
, ",nocto", "" },
594 { NFS_MOUNT_NOAC
, ",noac", "" },
595 { NFS_MOUNT_NONLM
, ",nolock", ",lock" },
596 { NFS_MOUNT_NOACL
, ",noacl", "" },
599 struct proc_nfs_info
*nfs_infop
;
600 struct nfs_server
*nfss
= NFS_SB(mnt
->mnt_sb
);
604 seq_printf(m
, ",v%d", nfss
->rpc_ops
->version
);
605 seq_printf(m
, ",rsize=%d", nfss
->rsize
);
606 seq_printf(m
, ",wsize=%d", nfss
->wsize
);
607 if (nfss
->acregmin
!= 3*HZ
)
608 seq_printf(m
, ",acregmin=%d", nfss
->acregmin
/HZ
);
609 if (nfss
->acregmax
!= 60*HZ
)
610 seq_printf(m
, ",acregmax=%d", nfss
->acregmax
/HZ
);
611 if (nfss
->acdirmin
!= 30*HZ
)
612 seq_printf(m
, ",acdirmin=%d", nfss
->acdirmin
/HZ
);
613 if (nfss
->acdirmax
!= 60*HZ
)
614 seq_printf(m
, ",acdirmax=%d", nfss
->acdirmax
/HZ
);
615 for (nfs_infop
= nfs_info
; nfs_infop
->flag
; nfs_infop
++) {
616 if (nfss
->flags
& nfs_infop
->flag
)
617 seq_puts(m
, nfs_infop
->str
);
619 seq_puts(m
, nfs_infop
->nostr
);
621 switch (nfss
->client
->cl_xprt
->prot
) {
629 snprintf(buf
, sizeof(buf
), "%u", nfss
->client
->cl_xprt
->prot
);
632 seq_printf(m
, ",proto=%s", proto
);
633 seq_puts(m
, ",addr=");
634 seq_escape(m
, nfss
->hostname
, " \t\n\\");
639 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
641 int nfs_sync_mapping(struct address_space
*mapping
)
645 if (mapping
->nrpages
== 0)
647 unmap_mapping_range(mapping
, 0, 0, 0);
648 ret
= filemap_fdatawrite(mapping
);
651 ret
= filemap_fdatawait(mapping
);
654 ret
= nfs_wb_all(mapping
->host
);
660 * Invalidate the local caches
662 static void nfs_zap_caches_locked(struct inode
*inode
)
664 struct nfs_inode
*nfsi
= NFS_I(inode
);
665 int mode
= inode
->i_mode
;
667 NFS_ATTRTIMEO(inode
) = NFS_MINATTRTIMEO(inode
);
668 NFS_ATTRTIMEO_UPDATE(inode
) = jiffies
;
670 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
671 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
672 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
674 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
677 void nfs_zap_caches(struct inode
*inode
)
679 spin_lock(&inode
->i_lock
);
680 nfs_zap_caches_locked(inode
);
681 spin_unlock(&inode
->i_lock
);
684 static void nfs_zap_acl_cache(struct inode
*inode
)
686 void (*clear_acl_cache
)(struct inode
*);
688 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
689 if (clear_acl_cache
!= NULL
)
690 clear_acl_cache(inode
);
691 spin_lock(&inode
->i_lock
);
692 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
693 spin_unlock(&inode
->i_lock
);
697 * Invalidate, but do not unhash, the inode.
698 * NB: must be called with inode->i_lock held!
700 static void nfs_invalidate_inode(struct inode
*inode
)
702 set_bit(NFS_INO_STALE
, &NFS_FLAGS(inode
));
703 nfs_zap_caches_locked(inode
);
706 struct nfs_find_desc
{
708 struct nfs_fattr
*fattr
;
712 * In NFSv3 we can have 64bit inode numbers. In order to support
713 * this, and re-exported directories (also seen in NFSv2)
714 * we are forced to allow 2 different inodes to have the same
718 nfs_find_actor(struct inode
*inode
, void *opaque
)
720 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
721 struct nfs_fh
*fh
= desc
->fh
;
722 struct nfs_fattr
*fattr
= desc
->fattr
;
724 if (NFS_FILEID(inode
) != fattr
->fileid
)
726 if (nfs_compare_fh(NFS_FH(inode
), fh
))
728 if (is_bad_inode(inode
) || NFS_STALE(inode
))
734 nfs_init_locked(struct inode
*inode
, void *opaque
)
736 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
737 struct nfs_fattr
*fattr
= desc
->fattr
;
739 NFS_FILEID(inode
) = fattr
->fileid
;
740 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
744 /* Don't use READDIRPLUS on directories that we believe are too large */
745 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
748 * This is our front-end to iget that looks up inodes by file handle
749 * instead of inode number.
752 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
754 struct nfs_find_desc desc
= {
758 struct inode
*inode
= NULL
;
761 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
765 printk("NFS: Buggy server - nlink == 0!\n");
769 hash
= nfs_fattr_to_ino_t(fattr
);
771 if (!(inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
)))
774 if (inode
->i_state
& I_NEW
) {
775 struct nfs_inode
*nfsi
= NFS_I(inode
);
777 /* We set i_ino for the few things that still rely on it,
781 /* We can't support update_atime(), since the server will reset it */
782 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
783 inode
->i_mode
= fattr
->mode
;
784 /* Why so? Because we want revalidate for devices/FIFOs, and
785 * that's precisely what we have in nfs_file_inode_operations.
787 inode
->i_op
= NFS_SB(sb
)->rpc_ops
->file_inode_ops
;
788 if (S_ISREG(inode
->i_mode
)) {
789 inode
->i_fop
= &nfs_file_operations
;
790 inode
->i_data
.a_ops
= &nfs_file_aops
;
791 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
792 } else if (S_ISDIR(inode
->i_mode
)) {
793 inode
->i_op
= NFS_SB(sb
)->rpc_ops
->dir_inode_ops
;
794 inode
->i_fop
= &nfs_dir_operations
;
795 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
796 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
797 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_FLAGS(inode
));
798 } else if (S_ISLNK(inode
->i_mode
))
799 inode
->i_op
= &nfs_symlink_inode_operations
;
801 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
803 nfsi
->read_cache_jiffies
= fattr
->time_start
;
804 nfsi
->last_updated
= jiffies
;
805 inode
->i_atime
= fattr
->atime
;
806 inode
->i_mtime
= fattr
->mtime
;
807 inode
->i_ctime
= fattr
->ctime
;
808 if (fattr
->valid
& NFS_ATTR_FATTR_V4
)
809 nfsi
->change_attr
= fattr
->change_attr
;
810 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
811 inode
->i_nlink
= fattr
->nlink
;
812 inode
->i_uid
= fattr
->uid
;
813 inode
->i_gid
= fattr
->gid
;
814 if (fattr
->valid
& (NFS_ATTR_FATTR_V3
| NFS_ATTR_FATTR_V4
)) {
816 * report the blocks in 512byte units
818 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
819 inode
->i_blksize
= inode
->i_sb
->s_blocksize
;
821 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
822 inode
->i_blksize
= fattr
->du
.nfs2
.blocksize
;
824 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
825 nfsi
->attrtimeo_timestamp
= jiffies
;
826 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
827 nfsi
->cache_access
.cred
= NULL
;
829 unlock_new_inode(inode
);
831 nfs_refresh_inode(inode
, fattr
);
832 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
834 (long long)NFS_FILEID(inode
),
835 atomic_read(&inode
->i_count
));
841 printk("nfs_fhget: iget failed\n");
845 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET)
848 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
850 struct inode
*inode
= dentry
->d_inode
;
851 struct nfs_fattr fattr
;
854 if (attr
->ia_valid
& ATTR_SIZE
) {
855 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
856 attr
->ia_valid
&= ~ATTR_SIZE
;
859 /* Optimization: if the end result is no change, don't RPC */
860 attr
->ia_valid
&= NFS_VALID_ATTRS
;
861 if (attr
->ia_valid
== 0)
865 nfs_begin_data_update(inode
);
866 /* Write all dirty data if we're changing file permissions or size */
867 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
|ATTR_SIZE
)) != 0) {
868 if (filemap_fdatawrite(inode
->i_mapping
) == 0)
869 filemap_fdatawait(inode
->i_mapping
);
873 * Return any delegations if we're going to change ACLs
875 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
876 nfs_inode_return_delegation(inode
);
877 error
= NFS_PROTO(inode
)->setattr(dentry
, &fattr
, attr
);
879 nfs_refresh_inode(inode
, &fattr
);
880 nfs_end_data_update(inode
);
886 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
887 * @inode: pointer to struct inode
888 * @attr: pointer to struct iattr
890 * Note: we do this in the *proc.c in order to ensure that
891 * it works for things like exclusive creates too.
893 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
895 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
896 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
897 int mode
= attr
->ia_mode
& S_IALLUGO
;
898 mode
|= inode
->i_mode
& ~S_IALLUGO
;
899 inode
->i_mode
= mode
;
901 if ((attr
->ia_valid
& ATTR_UID
) != 0)
902 inode
->i_uid
= attr
->ia_uid
;
903 if ((attr
->ia_valid
& ATTR_GID
) != 0)
904 inode
->i_gid
= attr
->ia_gid
;
905 spin_lock(&inode
->i_lock
);
906 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
907 spin_unlock(&inode
->i_lock
);
909 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
910 inode
->i_size
= attr
->ia_size
;
911 vmtruncate(inode
, attr
->ia_size
);
915 static int nfs_wait_schedule(void *word
)
917 if (signal_pending(current
))
924 * Wait for the inode to get unlocked.
926 static int nfs_wait_on_inode(struct inode
*inode
)
928 struct rpc_clnt
*clnt
= NFS_CLIENT(inode
);
929 struct nfs_inode
*nfsi
= NFS_I(inode
);
933 rpc_clnt_sigmask(clnt
, &oldmask
);
934 error
= wait_on_bit_lock(&nfsi
->flags
, NFS_INO_REVALIDATING
,
935 nfs_wait_schedule
, TASK_INTERRUPTIBLE
);
936 rpc_clnt_sigunmask(clnt
, &oldmask
);
941 static void nfs_wake_up_inode(struct inode
*inode
)
943 struct nfs_inode
*nfsi
= NFS_I(inode
);
945 clear_bit(NFS_INO_REVALIDATING
, &nfsi
->flags
);
946 smp_mb__after_clear_bit();
947 wake_up_bit(&nfsi
->flags
, NFS_INO_REVALIDATING
);
950 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
952 struct inode
*inode
= dentry
->d_inode
;
953 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
956 /* Flush out writes to the server in order to update c/mtime */
957 nfs_sync_inode(inode
, 0, 0, FLUSH_WAIT
|FLUSH_NOCOMMIT
);
958 if (__IS_FLG(inode
, MS_NOATIME
))
960 else if (__IS_FLG(inode
, MS_NODIRATIME
) && S_ISDIR(inode
->i_mode
))
962 /* We may force a getattr if the user cares about atime */
964 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
966 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
968 generic_fillattr(inode
, stat
);
972 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, struct rpc_cred
*cred
)
974 struct nfs_open_context
*ctx
;
976 ctx
= (struct nfs_open_context
*)kmalloc(sizeof(*ctx
), GFP_KERNEL
);
978 atomic_set(&ctx
->count
, 1);
979 ctx
->dentry
= dget(dentry
);
980 ctx
->cred
= get_rpccred(cred
);
982 ctx
->lockowner
= current
->files
;
989 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
992 atomic_inc(&ctx
->count
);
996 void put_nfs_open_context(struct nfs_open_context
*ctx
)
998 if (atomic_dec_and_test(&ctx
->count
)) {
999 if (!list_empty(&ctx
->list
)) {
1000 struct inode
*inode
= ctx
->dentry
->d_inode
;
1001 spin_lock(&inode
->i_lock
);
1002 list_del(&ctx
->list
);
1003 spin_unlock(&inode
->i_lock
);
1005 if (ctx
->state
!= NULL
)
1006 nfs4_close_state(ctx
->state
, ctx
->mode
);
1007 if (ctx
->cred
!= NULL
)
1008 put_rpccred(ctx
->cred
);
1015 * Ensure that mmap has a recent RPC credential for use when writing out
1018 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
1020 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1021 struct nfs_inode
*nfsi
= NFS_I(inode
);
1023 filp
->private_data
= get_nfs_open_context(ctx
);
1024 spin_lock(&inode
->i_lock
);
1025 list_add(&ctx
->list
, &nfsi
->open_files
);
1026 spin_unlock(&inode
->i_lock
);
1030 * Given an inode, search for an open context with the desired characteristics
1032 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, int mode
)
1034 struct nfs_inode
*nfsi
= NFS_I(inode
);
1035 struct nfs_open_context
*pos
, *ctx
= NULL
;
1037 spin_lock(&inode
->i_lock
);
1038 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
1039 if (cred
!= NULL
&& pos
->cred
!= cred
)
1041 if ((pos
->mode
& mode
) == mode
) {
1042 ctx
= get_nfs_open_context(pos
);
1046 spin_unlock(&inode
->i_lock
);
1050 void nfs_file_clear_open_context(struct file
*filp
)
1052 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1053 struct nfs_open_context
*ctx
= (struct nfs_open_context
*)filp
->private_data
;
1056 filp
->private_data
= NULL
;
1057 spin_lock(&inode
->i_lock
);
1058 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
1059 spin_unlock(&inode
->i_lock
);
1060 put_nfs_open_context(ctx
);
1065 * These allocate and release file read/write context information.
1067 int nfs_open(struct inode
*inode
, struct file
*filp
)
1069 struct nfs_open_context
*ctx
;
1070 struct rpc_cred
*cred
;
1072 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
1074 return PTR_ERR(cred
);
1075 ctx
= alloc_nfs_open_context(filp
->f_dentry
, cred
);
1079 ctx
->mode
= filp
->f_mode
;
1080 nfs_file_set_open_context(filp
, ctx
);
1081 put_nfs_open_context(ctx
);
1085 int nfs_release(struct inode
*inode
, struct file
*filp
)
1087 nfs_file_clear_open_context(filp
);
1092 * This function is called whenever some part of NFS notices that
1093 * the cached attributes have to be refreshed.
1096 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1098 int status
= -ESTALE
;
1099 struct nfs_fattr fattr
;
1100 struct nfs_inode
*nfsi
= NFS_I(inode
);
1102 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
1103 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
1106 if (!inode
|| is_bad_inode(inode
))
1108 if (NFS_STALE(inode
))
1111 status
= nfs_wait_on_inode(inode
);
1114 if (NFS_STALE(inode
)) {
1116 /* Do we trust the cached ESTALE? */
1117 if (NFS_ATTRTIMEO(inode
) != 0) {
1118 if (nfsi
->cache_validity
& (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ATIME
)) {
1125 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), &fattr
);
1127 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
1129 (long long)NFS_FILEID(inode
), status
);
1130 if (status
== -ESTALE
) {
1131 nfs_zap_caches(inode
);
1132 if (!S_ISDIR(inode
->i_mode
))
1133 set_bit(NFS_INO_STALE
, &NFS_FLAGS(inode
));
1138 spin_lock(&inode
->i_lock
);
1139 status
= nfs_update_inode(inode
, &fattr
);
1141 spin_unlock(&inode
->i_lock
);
1142 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
1144 (long long)NFS_FILEID(inode
), status
);
1147 spin_unlock(&inode
->i_lock
);
1149 nfs_revalidate_mapping(inode
, inode
->i_mapping
);
1151 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
1152 nfs_zap_acl_cache(inode
);
1154 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
1156 (long long)NFS_FILEID(inode
));
1159 nfs_wake_up_inode(inode
);
1166 int nfs_attribute_timeout(struct inode
*inode
)
1168 struct nfs_inode
*nfsi
= NFS_I(inode
);
1170 if (nfs_have_delegation(inode
, FMODE_READ
))
1172 return time_after(jiffies
, nfsi
->read_cache_jiffies
+nfsi
->attrtimeo
);
1176 * nfs_revalidate_inode - Revalidate the inode attributes
1177 * @server - pointer to nfs_server struct
1178 * @inode - pointer to inode struct
1180 * Updates inode attribute information by retrieving the data from the server.
1182 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1184 if (!(NFS_I(inode
)->cache_validity
& (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
))
1185 && !nfs_attribute_timeout(inode
))
1186 return NFS_STALE(inode
) ? -ESTALE
: 0;
1187 return __nfs_revalidate_inode(server
, inode
);
1191 * nfs_revalidate_mapping - Revalidate the pagecache
1192 * @inode - pointer to host inode
1193 * @mapping - pointer to mapping
1195 void nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1197 struct nfs_inode
*nfsi
= NFS_I(inode
);
1199 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
) {
1200 if (S_ISREG(inode
->i_mode
))
1201 nfs_sync_mapping(mapping
);
1202 invalidate_inode_pages2(mapping
);
1204 spin_lock(&inode
->i_lock
);
1205 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1206 if (S_ISDIR(inode
->i_mode
)) {
1207 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1208 /* This ensures we revalidate child dentries */
1209 nfsi
->cache_change_attribute
= jiffies
;
1211 spin_unlock(&inode
->i_lock
);
1213 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
1215 (long long)NFS_FILEID(inode
));
1220 * nfs_begin_data_update
1221 * @inode - pointer to inode
1222 * Declare that a set of operations will update file data on the server
1224 void nfs_begin_data_update(struct inode
*inode
)
1226 atomic_inc(&NFS_I(inode
)->data_updates
);
1230 * nfs_end_data_update
1231 * @inode - pointer to inode
1232 * Declare end of the operations that will update file data
1233 * This will mark the inode as immediately needing revalidation
1234 * of its attribute cache.
1236 void nfs_end_data_update(struct inode
*inode
)
1238 struct nfs_inode
*nfsi
= NFS_I(inode
);
1240 if (!nfs_have_delegation(inode
, FMODE_READ
)) {
1241 /* Directories and symlinks: invalidate page cache */
1242 if (S_ISDIR(inode
->i_mode
) || S_ISLNK(inode
->i_mode
)) {
1243 spin_lock(&inode
->i_lock
);
1244 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1245 spin_unlock(&inode
->i_lock
);
1248 nfsi
->cache_change_attribute
= jiffies
;
1249 atomic_dec(&nfsi
->data_updates
);
1252 static void nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1254 struct nfs_inode
*nfsi
= NFS_I(inode
);
1256 if ((fattr
->valid
& NFS_ATTR_PRE_CHANGE
) != 0
1257 && nfsi
->change_attr
== fattr
->pre_change_attr
) {
1258 nfsi
->change_attr
= fattr
->change_attr
;
1259 nfsi
->cache_change_attribute
= jiffies
;
1262 /* If we have atomic WCC data, we may update some attributes */
1263 if ((fattr
->valid
& NFS_ATTR_WCC
) != 0) {
1264 if (timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1265 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1266 nfsi
->cache_change_attribute
= jiffies
;
1268 if (timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1269 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1270 nfsi
->cache_change_attribute
= jiffies
;
1272 if (inode
->i_size
== fattr
->pre_size
&& nfsi
->npages
== 0) {
1273 inode
->i_size
= fattr
->size
;
1274 nfsi
->cache_change_attribute
= jiffies
;
1280 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1281 * @inode - pointer to inode
1282 * @fattr - updated attributes
1284 * Verifies the attribute cache. If we have just changed the attributes,
1285 * so that fattr carries weak cache consistency data, then it may
1286 * also update the ctime/mtime/change_attribute.
1288 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1290 struct nfs_inode
*nfsi
= NFS_I(inode
);
1291 loff_t cur_size
, new_isize
;
1295 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1298 /* Are we in the process of updating data on the server? */
1299 data_unstable
= nfs_caches_unstable(inode
);
1301 /* Do atomic weak cache consistency updates */
1302 nfs_wcc_update_inode(inode
, fattr
);
1304 if ((fattr
->valid
& NFS_ATTR_FATTR_V4
) != 0 &&
1305 nfsi
->change_attr
!= fattr
->change_attr
) {
1306 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1308 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1311 /* Has the inode gone and changed behind our back? */
1312 if (nfsi
->fileid
!= fattr
->fileid
1313 || (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1317 cur_size
= i_size_read(inode
);
1318 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1320 /* Verify a few of the more important attributes */
1321 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1322 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1324 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1326 if (cur_size
!= new_isize
) {
1327 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1328 if (nfsi
->npages
== 0)
1329 nfsi
->cache_validity
|= NFS_INO_REVAL_PAGECACHE
;
1332 /* Have any file permissions changed? */
1333 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)
1334 || inode
->i_uid
!= fattr
->uid
1335 || inode
->i_gid
!= fattr
->gid
)
1336 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1338 /* Has the link count changed? */
1339 if (inode
->i_nlink
!= fattr
->nlink
)
1340 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
1342 if (!timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1343 nfsi
->cache_validity
|= NFS_INO_INVALID_ATIME
;
1345 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1350 * nfs_refresh_inode - try to update the inode attribute cache
1351 * @inode - pointer to inode
1352 * @fattr - updated attributes
1354 * Check that an RPC call that returned attributes has not overlapped with
1355 * other recent updates of the inode metadata, then decide whether it is
1356 * safe to do a full update of the inode attributes, or whether just to
1357 * call nfs_check_inode_attributes.
1359 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1361 struct nfs_inode
*nfsi
= NFS_I(inode
);
1364 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1366 spin_lock(&inode
->i_lock
);
1367 nfsi
->cache_validity
&= ~NFS_INO_REVAL_PAGECACHE
;
1368 if (time_after(fattr
->time_start
, nfsi
->last_updated
))
1369 status
= nfs_update_inode(inode
, fattr
);
1371 status
= nfs_check_inode_attributes(inode
, fattr
);
1373 spin_unlock(&inode
->i_lock
);
1378 * nfs_post_op_update_inode - try to update the inode attribute cache
1379 * @inode - pointer to inode
1380 * @fattr - updated attributes
1382 * After an operation that has changed the inode metadata, mark the
1383 * attribute cache as being invalid, then try to update it.
1385 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1387 struct nfs_inode
*nfsi
= NFS_I(inode
);
1390 spin_lock(&inode
->i_lock
);
1391 if (unlikely((fattr
->valid
& NFS_ATTR_FATTR
) == 0)) {
1392 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
;
1395 status
= nfs_update_inode(inode
, fattr
);
1397 spin_unlock(&inode
->i_lock
);
1402 * Many nfs protocol calls return the new file attributes after
1403 * an operation. Here we update the inode to reflect the state
1404 * of the server's inode.
1406 * This is a bit tricky because we have to make sure all dirty pages
1407 * have been sent off to the server before calling invalidate_inode_pages.
1408 * To make sure no other process adds more write requests while we try
1409 * our best to flush them, we make them sleep during the attribute refresh.
1411 * A very similar scenario holds for the dir cache.
1413 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1415 struct nfs_inode
*nfsi
= NFS_I(inode
);
1416 loff_t cur_isize
, new_isize
;
1417 unsigned int invalid
= 0;
1420 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1421 __FUNCTION__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1422 atomic_read(&inode
->i_count
), fattr
->valid
);
1424 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1427 if (nfsi
->fileid
!= fattr
->fileid
)
1431 * Make sure the inode's type hasn't changed.
1433 if ((inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1437 * Update the read time so we don't revalidate too often.
1439 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1440 nfsi
->last_updated
= jiffies
;
1442 /* Are we racing with known updates of the metadata on the server? */
1443 data_stable
= nfs_verify_change_attribute(inode
, fattr
->time_start
);
1445 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ATIME
);
1447 /* Do atomic weak cache consistency updates */
1448 nfs_wcc_update_inode(inode
, fattr
);
1450 /* Check if our cached file size is stale */
1451 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1452 cur_isize
= i_size_read(inode
);
1453 if (new_isize
!= cur_isize
) {
1454 /* Do we perhaps have any outstanding writes? */
1455 if (nfsi
->npages
== 0) {
1456 /* No, but did we race with nfs_end_data_update()? */
1458 inode
->i_size
= new_isize
;
1459 invalid
|= NFS_INO_INVALID_DATA
;
1461 invalid
|= NFS_INO_INVALID_ATTR
;
1462 } else if (new_isize
> cur_isize
) {
1463 inode
->i_size
= new_isize
;
1464 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1466 nfsi
->cache_change_attribute
= jiffies
;
1467 dprintk("NFS: isize change on server for file %s/%ld\n",
1468 inode
->i_sb
->s_id
, inode
->i_ino
);
1471 /* Check if the mtime agrees */
1472 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1473 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1474 dprintk("NFS: mtime change on server for file %s/%ld\n",
1475 inode
->i_sb
->s_id
, inode
->i_ino
);
1476 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1477 nfsi
->cache_change_attribute
= jiffies
;
1480 if ((fattr
->valid
& NFS_ATTR_FATTR_V4
)
1481 && nfsi
->change_attr
!= fattr
->change_attr
) {
1482 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1483 inode
->i_sb
->s_id
, inode
->i_ino
);
1484 nfsi
->change_attr
= fattr
->change_attr
;
1485 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1486 nfsi
->cache_change_attribute
= jiffies
;
1489 /* If ctime has changed we should definitely clear access+acl caches */
1490 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1491 invalid
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1492 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1493 nfsi
->cache_change_attribute
= jiffies
;
1495 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1497 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
) ||
1498 inode
->i_uid
!= fattr
->uid
||
1499 inode
->i_gid
!= fattr
->gid
)
1500 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1502 inode
->i_mode
= fattr
->mode
;
1503 inode
->i_nlink
= fattr
->nlink
;
1504 inode
->i_uid
= fattr
->uid
;
1505 inode
->i_gid
= fattr
->gid
;
1507 if (fattr
->valid
& (NFS_ATTR_FATTR_V3
| NFS_ATTR_FATTR_V4
)) {
1509 * report the blocks in 512byte units
1511 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1512 inode
->i_blksize
= inode
->i_sb
->s_blocksize
;
1514 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1515 inode
->i_blksize
= fattr
->du
.nfs2
.blocksize
;
1518 /* Update attrtimeo value if we're out of the unstable period */
1519 if (invalid
& NFS_INO_INVALID_ATTR
) {
1520 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1521 nfsi
->attrtimeo_timestamp
= jiffies
;
1522 } else if (time_after(jiffies
, nfsi
->attrtimeo_timestamp
+nfsi
->attrtimeo
)) {
1523 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1524 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1525 nfsi
->attrtimeo_timestamp
= jiffies
;
1527 /* Don't invalidate the data if we were to blame */
1528 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1529 || S_ISLNK(inode
->i_mode
)))
1530 invalid
&= ~NFS_INO_INVALID_DATA
;
1532 invalid
&= ~(NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ATIME
|NFS_INO_REVAL_PAGECACHE
);
1533 if (!nfs_have_delegation(inode
, FMODE_READ
))
1534 nfsi
->cache_validity
|= invalid
;
1539 * Big trouble! The inode has become a different object.
1542 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1543 __FUNCTION__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1547 * No need to worry about unhashing the dentry, as the
1548 * lookup validation will know that the inode is bad.
1549 * (But we fall through to invalidate the caches.)
1551 nfs_invalidate_inode(inode
);
1555 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1556 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1557 NFS_SERVER(inode
)->hostname
, inode
->i_sb
->s_id
,
1558 (long long)nfsi
->fileid
, (long long)fattr
->fileid
);
1563 * File system information
1566 static int nfs_set_super(struct super_block
*s
, void *data
)
1568 s
->s_fs_info
= data
;
1569 return set_anon_super(s
, data
);
1572 static int nfs_compare_super(struct super_block
*sb
, void *data
)
1574 struct nfs_server
*server
= data
;
1575 struct nfs_server
*old
= NFS_SB(sb
);
1577 if (old
->addr
.sin_addr
.s_addr
!= server
->addr
.sin_addr
.s_addr
)
1579 if (old
->addr
.sin_port
!= server
->addr
.sin_port
)
1581 return !nfs_compare_fh(&old
->fh
, &server
->fh
);
1584 static struct super_block
*nfs_get_sb(struct file_system_type
*fs_type
,
1585 int flags
, const char *dev_name
, void *raw_data
)
1588 struct nfs_server
*server
= NULL
;
1589 struct super_block
*s
;
1590 struct nfs_fh
*root
;
1591 struct nfs_mount_data
*data
= raw_data
;
1593 s
= ERR_PTR(-EINVAL
);
1595 dprintk("%s: missing data argument\n", __FUNCTION__
);
1598 if (data
->version
<= 0 || data
->version
> NFS_MOUNT_VERSION
) {
1599 dprintk("%s: bad mount version\n", __FUNCTION__
);
1602 switch (data
->version
) {
1608 if (data
->flags
& NFS_MOUNT_VER3
) {
1609 dprintk("%s: mount structure version %d does not support NFSv3\n",
1614 data
->root
.size
= NFS2_FHSIZE
;
1615 memcpy(data
->root
.data
, data
->old_root
.data
, NFS2_FHSIZE
);
1617 if (data
->flags
& NFS_MOUNT_SECFLAVOUR
) {
1618 dprintk("%s: mount structure version %d does not support strong security\n",
1624 memset(data
->context
, 0, sizeof(data
->context
));
1626 #ifndef CONFIG_NFS_V3
1627 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1628 s
= ERR_PTR(-EPROTONOSUPPORT
);
1629 if (data
->flags
& NFS_MOUNT_VER3
) {
1630 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__
);
1633 #endif /* CONFIG_NFS_V3 */
1635 s
= ERR_PTR(-ENOMEM
);
1636 server
= kmalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1639 memset(server
, 0, sizeof(struct nfs_server
));
1640 /* Zero out the NFS state stuff */
1641 init_nfsv4_state(server
);
1642 server
->client
= server
->client_sys
= server
->client_acl
= ERR_PTR(-EINVAL
);
1645 if (data
->flags
& NFS_MOUNT_VER3
)
1646 root
->size
= data
->root
.size
;
1648 root
->size
= NFS2_FHSIZE
;
1649 s
= ERR_PTR(-EINVAL
);
1650 if (root
->size
> sizeof(root
->data
)) {
1651 dprintk("%s: invalid root filehandle\n", __FUNCTION__
);
1654 memcpy(root
->data
, data
->root
.data
, root
->size
);
1656 /* We now require that the mount process passes the remote address */
1657 memcpy(&server
->addr
, &data
->addr
, sizeof(server
->addr
));
1658 if (server
->addr
.sin_addr
.s_addr
== INADDR_ANY
) {
1659 dprintk("%s: mount program didn't pass remote address!\n",
1664 /* Fire up rpciod if not yet running */
1665 s
= ERR_PTR(rpciod_up());
1667 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1668 __FUNCTION__
, PTR_ERR(s
));
1672 s
= sget(fs_type
, nfs_compare_super
, nfs_set_super
, server
);
1673 if (IS_ERR(s
) || s
->s_root
)
1674 goto out_rpciod_down
;
1678 error
= nfs_fill_super(s
, data
, flags
& MS_VERBOSE
? 1 : 0);
1680 up_write(&s
->s_umount
);
1681 deactivate_super(s
);
1682 return ERR_PTR(error
);
1684 s
->s_flags
|= MS_ACTIVE
;
1693 static void nfs_kill_super(struct super_block
*s
)
1695 struct nfs_server
*server
= NFS_SB(s
);
1699 if (!IS_ERR(server
->client
))
1700 rpc_shutdown_client(server
->client
);
1701 if (!IS_ERR(server
->client_sys
))
1702 rpc_shutdown_client(server
->client_sys
);
1703 if (!IS_ERR(server
->client_acl
))
1704 rpc_shutdown_client(server
->client_acl
);
1706 if (!(server
->flags
& NFS_MOUNT_NONLM
))
1707 lockd_down(); /* release rpc.lockd */
1709 rpciod_down(); /* release rpciod */
1711 kfree(server
->hostname
);
1715 static struct file_system_type nfs_fs_type
= {
1716 .owner
= THIS_MODULE
,
1718 .get_sb
= nfs_get_sb
,
1719 .kill_sb
= nfs_kill_super
,
1720 .fs_flags
= FS_ODD_RENAME
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
1723 #ifdef CONFIG_NFS_V4
1725 static void nfs4_clear_inode(struct inode
*);
1728 static struct super_operations nfs4_sops
= {
1729 .alloc_inode
= nfs_alloc_inode
,
1730 .destroy_inode
= nfs_destroy_inode
,
1731 .write_inode
= nfs_write_inode
,
1732 .delete_inode
= nfs_delete_inode
,
1733 .statfs
= nfs_statfs
,
1734 .clear_inode
= nfs4_clear_inode
,
1735 .umount_begin
= nfs_umount_begin
,
1736 .show_options
= nfs_show_options
,
1740 * Clean out any remaining NFSv4 state that might be left over due
1741 * to open() calls that passed nfs_atomic_lookup, but failed to call
1744 static void nfs4_clear_inode(struct inode
*inode
)
1746 struct nfs_inode
*nfsi
= NFS_I(inode
);
1748 /* If we are holding a delegation, return it! */
1749 nfs_inode_return_delegation(inode
);
1750 /* First call standard NFS clear_inode() code */
1751 nfs_clear_inode(inode
);
1752 /* Now clear out any remaining state */
1753 while (!list_empty(&nfsi
->open_states
)) {
1754 struct nfs4_state
*state
;
1756 state
= list_entry(nfsi
->open_states
.next
,
1759 dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
1762 (long long)NFS_FILEID(inode
),
1764 BUG_ON(atomic_read(&state
->count
) != 1);
1765 nfs4_close_state(state
, state
->state
);
1770 static int nfs4_fill_super(struct super_block
*sb
, struct nfs4_mount_data
*data
, int silent
)
1772 struct nfs_server
*server
;
1773 struct nfs4_client
*clp
= NULL
;
1774 struct rpc_xprt
*xprt
= NULL
;
1775 struct rpc_clnt
*clnt
= NULL
;
1776 struct rpc_timeout timeparms
;
1777 rpc_authflavor_t authflavour
;
1780 sb
->s_blocksize_bits
= 0;
1781 sb
->s_blocksize
= 0;
1782 server
= NFS_SB(sb
);
1783 if (data
->rsize
!= 0)
1784 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1785 if (data
->wsize
!= 0)
1786 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1787 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
1788 server
->caps
= NFS_CAP_ATOMIC_OPEN
;
1790 server
->acregmin
= data
->acregmin
*HZ
;
1791 server
->acregmax
= data
->acregmax
*HZ
;
1792 server
->acdirmin
= data
->acdirmin
*HZ
;
1793 server
->acdirmax
= data
->acdirmax
*HZ
;
1795 server
->rpc_ops
= &nfs_v4_clientops
;
1797 nfs_init_timeout_values(&timeparms
, data
->proto
, data
->timeo
, data
->retrans
);
1799 clp
= nfs4_get_client(&server
->addr
.sin_addr
);
1801 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__
);
1805 /* Now create transport and client */
1806 authflavour
= RPC_AUTH_UNIX
;
1807 if (data
->auth_flavourlen
!= 0) {
1808 if (data
->auth_flavourlen
!= 1) {
1809 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1810 __FUNCTION__
, data
->auth_flavourlen
);
1814 if (copy_from_user(&authflavour
, data
->auth_flavours
, sizeof(authflavour
))) {
1820 down_write(&clp
->cl_sem
);
1821 if (IS_ERR(clp
->cl_rpcclient
)) {
1822 xprt
= xprt_create_proto(data
->proto
, &server
->addr
, &timeparms
);
1824 up_write(&clp
->cl_sem
);
1825 err
= PTR_ERR(xprt
);
1826 dprintk("%s: cannot create RPC transport. Error = %d\n",
1830 clnt
= rpc_create_client(xprt
, server
->hostname
, &nfs_program
,
1831 server
->rpc_ops
->version
, authflavour
);
1833 up_write(&clp
->cl_sem
);
1834 err
= PTR_ERR(clnt
);
1835 dprintk("%s: cannot create RPC client. Error = %d\n",
1840 clnt
->cl_softrtry
= 1;
1841 clnt
->cl_chatty
= 1;
1842 clp
->cl_rpcclient
= clnt
;
1843 memcpy(clp
->cl_ipaddr
, server
->ip_addr
, sizeof(clp
->cl_ipaddr
));
1846 list_add_tail(&server
->nfs4_siblings
, &clp
->cl_superblocks
);
1847 clnt
= rpc_clone_client(clp
->cl_rpcclient
);
1849 server
->nfs4_state
= clp
;
1850 up_write(&clp
->cl_sem
);
1854 err
= PTR_ERR(clnt
);
1855 dprintk("%s: cannot create RPC client. Error = %d\n",
1860 server
->client
= clnt
;
1862 if (server
->nfs4_state
->cl_idmap
== NULL
) {
1863 dprintk("%s: failed to create idmapper.\n", __FUNCTION__
);
1867 if (clnt
->cl_auth
->au_flavor
!= authflavour
) {
1868 struct rpc_auth
*auth
;
1870 auth
= rpcauth_create(authflavour
, clnt
);
1872 dprintk("%s: couldn't create credcache!\n", __FUNCTION__
);
1873 return PTR_ERR(auth
);
1877 sb
->s_time_gran
= 1;
1879 sb
->s_op
= &nfs4_sops
;
1880 err
= nfs_sb_init(sb
, authflavour
);
1885 nfs4_put_client(clp
);
1889 static int nfs4_compare_super(struct super_block
*sb
, void *data
)
1891 struct nfs_server
*server
= data
;
1892 struct nfs_server
*old
= NFS_SB(sb
);
1894 if (strcmp(server
->hostname
, old
->hostname
) != 0)
1896 if (strcmp(server
->mnt_path
, old
->mnt_path
) != 0)
1902 nfs_copy_user_string(char *dst
, struct nfs_string
*src
, int maxlen
)
1907 return ERR_PTR(-EINVAL
);
1908 if (src
->len
< maxlen
)
1911 p
= dst
= kmalloc(maxlen
+ 1, GFP_KERNEL
);
1913 return ERR_PTR(-ENOMEM
);
1915 if (copy_from_user(dst
, src
->data
, maxlen
)) {
1917 return ERR_PTR(-EFAULT
);
1923 static struct super_block
*nfs4_get_sb(struct file_system_type
*fs_type
,
1924 int flags
, const char *dev_name
, void *raw_data
)
1927 struct nfs_server
*server
;
1928 struct super_block
*s
;
1929 struct nfs4_mount_data
*data
= raw_data
;
1933 dprintk("%s: missing data argument\n", __FUNCTION__
);
1934 return ERR_PTR(-EINVAL
);
1936 if (data
->version
<= 0 || data
->version
> NFS4_MOUNT_VERSION
) {
1937 dprintk("%s: bad mount version\n", __FUNCTION__
);
1938 return ERR_PTR(-EINVAL
);
1941 server
= kmalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1943 return ERR_PTR(-ENOMEM
);
1944 memset(server
, 0, sizeof(struct nfs_server
));
1945 /* Zero out the NFS state stuff */
1946 init_nfsv4_state(server
);
1947 server
->client
= server
->client_sys
= server
->client_acl
= ERR_PTR(-EINVAL
);
1949 p
= nfs_copy_user_string(NULL
, &data
->hostname
, 256);
1952 server
->hostname
= p
;
1954 p
= nfs_copy_user_string(NULL
, &data
->mnt_path
, 1024);
1957 server
->mnt_path
= p
;
1959 p
= nfs_copy_user_string(server
->ip_addr
, &data
->client_addr
,
1960 sizeof(server
->ip_addr
) - 1);
1964 /* We now require that the mount process passes the remote address */
1965 if (data
->host_addrlen
!= sizeof(server
->addr
)) {
1966 s
= ERR_PTR(-EINVAL
);
1969 if (copy_from_user(&server
->addr
, data
->host_addr
, sizeof(server
->addr
))) {
1970 s
= ERR_PTR(-EFAULT
);
1973 if (server
->addr
.sin_family
!= AF_INET
||
1974 server
->addr
.sin_addr
.s_addr
== INADDR_ANY
) {
1975 dprintk("%s: mount program didn't pass remote IP address!\n",
1977 s
= ERR_PTR(-EINVAL
);
1981 /* Fire up rpciod if not yet running */
1982 s
= ERR_PTR(rpciod_up());
1984 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1985 __FUNCTION__
, PTR_ERR(s
));
1989 s
= sget(fs_type
, nfs4_compare_super
, nfs_set_super
, server
);
1991 if (IS_ERR(s
) || s
->s_root
)
1996 error
= nfs4_fill_super(s
, data
, flags
& MS_VERBOSE
? 1 : 0);
1998 up_write(&s
->s_umount
);
1999 deactivate_super(s
);
2000 return ERR_PTR(error
);
2002 s
->s_flags
|= MS_ACTIVE
;
2005 s
= (struct super_block
*)p
;
2007 kfree(server
->mnt_path
);
2008 kfree(server
->hostname
);
2013 static void nfs4_kill_super(struct super_block
*sb
)
2015 struct nfs_server
*server
= NFS_SB(sb
);
2017 nfs_return_all_delegations(sb
);
2018 kill_anon_super(sb
);
2020 nfs4_renewd_prepare_shutdown(server
);
2022 if (server
->client
!= NULL
&& !IS_ERR(server
->client
))
2023 rpc_shutdown_client(server
->client
);
2024 rpciod_down(); /* release rpciod */
2026 destroy_nfsv4_state(server
);
2028 kfree(server
->hostname
);
2032 static struct file_system_type nfs4_fs_type
= {
2033 .owner
= THIS_MODULE
,
2035 .get_sb
= nfs4_get_sb
,
2036 .kill_sb
= nfs4_kill_super
,
2037 .fs_flags
= FS_ODD_RENAME
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
2040 static const int nfs_set_port_min
= 0;
2041 static const int nfs_set_port_max
= 65535;
2042 static int param_set_port(const char *val
, struct kernel_param
*kp
)
2045 int num
= simple_strtol(val
, &endp
, 0);
2046 if (endp
== val
|| *endp
|| num
< nfs_set_port_min
|| num
> nfs_set_port_max
)
2048 *((int *)kp
->arg
) = num
;
2052 module_param_call(callback_tcpport
, param_set_port
, param_get_int
,
2053 &nfs_callback_set_tcpport
, 0644);
2055 #define nfs4_init_once(nfsi) \
2057 INIT_LIST_HEAD(&(nfsi)->open_states); \
2058 nfsi->delegation = NULL; \
2059 nfsi->delegation_state = 0; \
2060 init_rwsem(&nfsi->rwsem); \
2063 static inline int register_nfs4fs(void)
2067 ret
= nfs_register_sysctl();
2070 ret
= register_filesystem(&nfs4_fs_type
);
2072 nfs_unregister_sysctl();
2076 static inline void unregister_nfs4fs(void)
2078 unregister_filesystem(&nfs4_fs_type
);
2079 nfs_unregister_sysctl();
2082 #define nfs4_init_once(nfsi) \
2084 #define register_nfs4fs() (0)
2085 #define unregister_nfs4fs()
2088 extern int nfs_init_nfspagecache(void);
2089 extern void nfs_destroy_nfspagecache(void);
2090 extern int nfs_init_readpagecache(void);
2091 extern void nfs_destroy_readpagecache(void);
2092 extern int nfs_init_writepagecache(void);
2093 extern void nfs_destroy_writepagecache(void);
2094 #ifdef CONFIG_NFS_DIRECTIO
2095 extern int nfs_init_directcache(void);
2096 extern void nfs_destroy_directcache(void);
2099 static kmem_cache_t
* nfs_inode_cachep
;
2101 static struct inode
*nfs_alloc_inode(struct super_block
*sb
)
2103 struct nfs_inode
*nfsi
;
2104 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, SLAB_KERNEL
);
2108 nfsi
->cache_validity
= 0UL;
2109 nfsi
->cache_change_attribute
= jiffies
;
2110 #ifdef CONFIG_NFS_V3_ACL
2111 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
2112 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
2114 #ifdef CONFIG_NFS_V4
2115 nfsi
->nfs4_acl
= NULL
;
2116 #endif /* CONFIG_NFS_V4 */
2117 return &nfsi
->vfs_inode
;
2120 static void nfs_destroy_inode(struct inode
*inode
)
2122 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
2125 static void init_once(void * foo
, kmem_cache_t
* cachep
, unsigned long flags
)
2127 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
2129 if ((flags
& (SLAB_CTOR_VERIFY
|SLAB_CTOR_CONSTRUCTOR
)) ==
2130 SLAB_CTOR_CONSTRUCTOR
) {
2131 inode_init_once(&nfsi
->vfs_inode
);
2132 spin_lock_init(&nfsi
->req_lock
);
2133 INIT_LIST_HEAD(&nfsi
->dirty
);
2134 INIT_LIST_HEAD(&nfsi
->commit
);
2135 INIT_LIST_HEAD(&nfsi
->open_files
);
2136 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
2137 atomic_set(&nfsi
->data_updates
, 0);
2141 nfs4_init_once(nfsi
);
2145 static int nfs_init_inodecache(void)
2147 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
2148 sizeof(struct nfs_inode
),
2149 0, SLAB_RECLAIM_ACCOUNT
,
2151 if (nfs_inode_cachep
== NULL
)
2157 static void nfs_destroy_inodecache(void)
2159 if (kmem_cache_destroy(nfs_inode_cachep
))
2160 printk(KERN_INFO
"nfs_inode_cache: not all structures were freed\n");
2166 static int __init
init_nfs_fs(void)
2170 err
= nfs_init_nfspagecache();
2174 err
= nfs_init_inodecache();
2178 err
= nfs_init_readpagecache();
2182 err
= nfs_init_writepagecache();
2186 #ifdef CONFIG_NFS_DIRECTIO
2187 err
= nfs_init_directcache();
2192 #ifdef CONFIG_PROC_FS
2193 rpc_proc_register(&nfs_rpcstat
);
2195 err
= register_filesystem(&nfs_fs_type
);
2198 if ((err
= register_nfs4fs()) != 0)
2202 #ifdef CONFIG_PROC_FS
2203 rpc_proc_unregister("nfs");
2205 #ifdef CONFIG_NFS_DIRECTIO
2206 nfs_destroy_directcache();
2209 nfs_destroy_writepagecache();
2211 nfs_destroy_readpagecache();
2213 nfs_destroy_inodecache();
2215 nfs_destroy_nfspagecache();
2220 static void __exit
exit_nfs_fs(void)
2222 #ifdef CONFIG_NFS_DIRECTIO
2223 nfs_destroy_directcache();
2225 nfs_destroy_writepagecache();
2226 nfs_destroy_readpagecache();
2227 nfs_destroy_inodecache();
2228 nfs_destroy_nfspagecache();
2229 #ifdef CONFIG_PROC_FS
2230 rpc_proc_unregister("nfs");
2232 unregister_filesystem(&nfs_fs_type
);
2233 unregister_nfs4fs();
2236 /* Not quite true; I just maintain it */
2237 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2238 MODULE_LICENSE("GPL");
2240 module_init(init_nfs_fs
)
2241 module_exit(exit_nfs_fs
)