4 * Copyright (C) 1992 Rick Sladkey
6 * nfs 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
14 * Split from inode.c by David Howells <dhowells@redhat.com>
16 * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a
17 * particular server are held in the same superblock
18 * - NFS superblocks can have several effective roots to the dentry tree
19 * - directory type roots are spliced into the tree when a path from one root reaches the root
20 * of another (see nfs_lookup())
23 #include <linux/module.h>
24 #include <linux/init.h>
26 #include <linux/time.h>
27 #include <linux/kernel.h>
29 #include <linux/string.h>
30 #include <linux/stat.h>
31 #include <linux/errno.h>
32 #include <linux/unistd.h>
33 #include <linux/sunrpc/clnt.h>
34 #include <linux/sunrpc/stats.h>
35 #include <linux/sunrpc/metrics.h>
36 #include <linux/sunrpc/xprtsock.h>
37 #include <linux/sunrpc/xprtrdma.h>
38 #include <linux/nfs_fs.h>
39 #include <linux/nfs_mount.h>
40 #include <linux/nfs4_mount.h>
41 #include <linux/lockd/bind.h>
42 #include <linux/smp_lock.h>
43 #include <linux/seq_file.h>
44 #include <linux/mount.h>
45 #include <linux/nfs_idmap.h>
46 #include <linux/vfs.h>
47 #include <linux/inet.h>
48 #include <linux/nfs_xdr.h>
49 #include <linux/magic.h>
50 #include <linux/parser.h>
52 #include <asm/system.h>
53 #include <asm/uaccess.h>
57 #include "delegation.h"
61 #define NFSDBG_FACILITY NFSDBG_VFS
64 /* Mount options that take no arguments */
67 Opt_posix
, Opt_noposix
,
72 Opt_udp
, Opt_tcp
, Opt_rdma
,
74 Opt_rdirplus
, Opt_nordirplus
,
75 Opt_sharecache
, Opt_nosharecache
,
77 /* Mount options that take integer arguments */
79 Opt_rsize
, Opt_wsize
, Opt_bsize
,
80 Opt_timeo
, Opt_retrans
,
81 Opt_acregmin
, Opt_acregmax
,
82 Opt_acdirmin
, Opt_acdirmax
,
89 /* Mount options that take string arguments */
90 Opt_sec
, Opt_proto
, Opt_mountproto
,
91 Opt_addr
, Opt_mountaddr
, Opt_clientaddr
,
93 /* Mount options that are ignored */
94 Opt_userspace
, Opt_deprecated
,
99 static match_table_t nfs_mount_option_tokens
= {
100 { Opt_userspace
, "bg" },
101 { Opt_userspace
, "fg" },
102 { Opt_soft
, "soft" },
103 { Opt_hard
, "hard" },
104 { Opt_intr
, "intr" },
105 { Opt_nointr
, "nointr" },
106 { Opt_posix
, "posix" },
107 { Opt_noposix
, "noposix" },
109 { Opt_nocto
, "nocto" },
111 { Opt_noac
, "noac" },
112 { Opt_lock
, "lock" },
113 { Opt_nolock
, "nolock" },
118 { Opt_rdma
, "rdma" },
120 { Opt_noacl
, "noacl" },
121 { Opt_rdirplus
, "rdirplus" },
122 { Opt_nordirplus
, "nordirplus" },
123 { Opt_sharecache
, "sharecache" },
124 { Opt_nosharecache
, "nosharecache" },
126 { Opt_port
, "port=%u" },
127 { Opt_rsize
, "rsize=%u" },
128 { Opt_wsize
, "wsize=%u" },
129 { Opt_bsize
, "bsize=%u" },
130 { Opt_timeo
, "timeo=%u" },
131 { Opt_retrans
, "retrans=%u" },
132 { Opt_acregmin
, "acregmin=%u" },
133 { Opt_acregmax
, "acregmax=%u" },
134 { Opt_acdirmin
, "acdirmin=%u" },
135 { Opt_acdirmax
, "acdirmax=%u" },
136 { Opt_actimeo
, "actimeo=%u" },
137 { Opt_userspace
, "retry=%u" },
138 { Opt_namelen
, "namlen=%u" },
139 { Opt_mountport
, "mountport=%u" },
140 { Opt_mountvers
, "mountvers=%u" },
141 { Opt_nfsvers
, "nfsvers=%u" },
142 { Opt_nfsvers
, "vers=%u" },
144 { Opt_sec
, "sec=%s" },
145 { Opt_proto
, "proto=%s" },
146 { Opt_mountproto
, "mountproto=%s" },
147 { Opt_addr
, "addr=%s" },
148 { Opt_clientaddr
, "clientaddr=%s" },
149 { Opt_userspace
, "mounthost=%s" },
150 { Opt_mountaddr
, "mountaddr=%s" },
156 Opt_xprt_udp
, Opt_xprt_tcp
, Opt_xprt_rdma
,
161 static match_table_t nfs_xprt_protocol_tokens
= {
162 { Opt_xprt_udp
, "udp" },
163 { Opt_xprt_tcp
, "tcp" },
164 { Opt_xprt_rdma
, "rdma" },
166 { Opt_xprt_err
, NULL
}
170 Opt_sec_none
, Opt_sec_sys
,
171 Opt_sec_krb5
, Opt_sec_krb5i
, Opt_sec_krb5p
,
172 Opt_sec_lkey
, Opt_sec_lkeyi
, Opt_sec_lkeyp
,
173 Opt_sec_spkm
, Opt_sec_spkmi
, Opt_sec_spkmp
,
178 static match_table_t nfs_secflavor_tokens
= {
179 { Opt_sec_none
, "none" },
180 { Opt_sec_none
, "null" },
181 { Opt_sec_sys
, "sys" },
183 { Opt_sec_krb5
, "krb5" },
184 { Opt_sec_krb5i
, "krb5i" },
185 { Opt_sec_krb5p
, "krb5p" },
187 { Opt_sec_lkey
, "lkey" },
188 { Opt_sec_lkeyi
, "lkeyi" },
189 { Opt_sec_lkeyp
, "lkeyp" },
191 { Opt_sec_err
, NULL
}
195 static void nfs_umount_begin(struct vfsmount
*, int);
196 static int nfs_statfs(struct dentry
*, struct kstatfs
*);
197 static int nfs_show_options(struct seq_file
*, struct vfsmount
*);
198 static int nfs_show_stats(struct seq_file
*, struct vfsmount
*);
199 static int nfs_get_sb(struct file_system_type
*, int, const char *, void *, struct vfsmount
*);
200 static int nfs_xdev_get_sb(struct file_system_type
*fs_type
,
201 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
);
202 static void nfs_kill_super(struct super_block
*);
203 static void nfs_put_super(struct super_block
*);
205 static struct file_system_type nfs_fs_type
= {
206 .owner
= THIS_MODULE
,
208 .get_sb
= nfs_get_sb
,
209 .kill_sb
= nfs_kill_super
,
210 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
213 struct file_system_type nfs_xdev_fs_type
= {
214 .owner
= THIS_MODULE
,
216 .get_sb
= nfs_xdev_get_sb
,
217 .kill_sb
= nfs_kill_super
,
218 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
221 static const struct super_operations nfs_sops
= {
222 .alloc_inode
= nfs_alloc_inode
,
223 .destroy_inode
= nfs_destroy_inode
,
224 .write_inode
= nfs_write_inode
,
225 .put_super
= nfs_put_super
,
226 .statfs
= nfs_statfs
,
227 .clear_inode
= nfs_clear_inode
,
228 .umount_begin
= nfs_umount_begin
,
229 .show_options
= nfs_show_options
,
230 .show_stats
= nfs_show_stats
,
234 static int nfs4_get_sb(struct file_system_type
*fs_type
,
235 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
);
236 static int nfs4_xdev_get_sb(struct file_system_type
*fs_type
,
237 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
);
238 static int nfs4_referral_get_sb(struct file_system_type
*fs_type
,
239 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
);
240 static void nfs4_kill_super(struct super_block
*sb
);
242 static struct file_system_type nfs4_fs_type
= {
243 .owner
= THIS_MODULE
,
245 .get_sb
= nfs4_get_sb
,
246 .kill_sb
= nfs4_kill_super
,
247 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
250 struct file_system_type nfs4_xdev_fs_type
= {
251 .owner
= THIS_MODULE
,
253 .get_sb
= nfs4_xdev_get_sb
,
254 .kill_sb
= nfs4_kill_super
,
255 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
258 struct file_system_type nfs4_referral_fs_type
= {
259 .owner
= THIS_MODULE
,
261 .get_sb
= nfs4_referral_get_sb
,
262 .kill_sb
= nfs4_kill_super
,
263 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
266 static const struct super_operations nfs4_sops
= {
267 .alloc_inode
= nfs_alloc_inode
,
268 .destroy_inode
= nfs_destroy_inode
,
269 .write_inode
= nfs_write_inode
,
270 .statfs
= nfs_statfs
,
271 .clear_inode
= nfs4_clear_inode
,
272 .umount_begin
= nfs_umount_begin
,
273 .show_options
= nfs_show_options
,
274 .show_stats
= nfs_show_stats
,
278 static struct shrinker acl_shrinker
= {
279 .shrink
= nfs_access_cache_shrinker
,
280 .seeks
= DEFAULT_SEEKS
,
284 * Register the NFS filesystems
286 int __init
register_nfs_fs(void)
290 ret
= register_filesystem(&nfs_fs_type
);
294 ret
= nfs_register_sysctl();
298 ret
= register_filesystem(&nfs4_fs_type
);
302 register_shrinker(&acl_shrinker
);
307 nfs_unregister_sysctl();
310 unregister_filesystem(&nfs_fs_type
);
316 * Unregister the NFS filesystems
318 void __exit
unregister_nfs_fs(void)
320 unregister_shrinker(&acl_shrinker
);
322 unregister_filesystem(&nfs4_fs_type
);
324 nfs_unregister_sysctl();
325 unregister_filesystem(&nfs_fs_type
);
328 void nfs_sb_active(struct nfs_server
*server
)
330 atomic_inc(&server
->active
);
333 void nfs_sb_deactive(struct nfs_server
*server
)
335 if (atomic_dec_and_test(&server
->active
))
336 wake_up(&server
->active_wq
);
339 static void nfs_put_super(struct super_block
*sb
)
341 struct nfs_server
*server
= NFS_SB(sb
);
343 * Make sure there are no outstanding ops to this server.
344 * If so, wait for them to finish before allowing the
345 * unmount to continue.
347 wait_event(server
->active_wq
, atomic_read(&server
->active
) == 0);
351 * Deliver file system statistics to userspace
353 static int nfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
355 struct nfs_server
*server
= NFS_SB(dentry
->d_sb
);
356 unsigned char blockbits
;
357 unsigned long blockres
;
358 struct nfs_fh
*fh
= NFS_FH(dentry
->d_inode
);
359 struct nfs_fattr fattr
;
360 struct nfs_fsstat res
= {
367 error
= server
->nfs_client
->rpc_ops
->statfs(server
, fh
, &res
);
370 buf
->f_type
= NFS_SUPER_MAGIC
;
373 * Current versions of glibc do not correctly handle the
374 * case where f_frsize != f_bsize. Eventually we want to
375 * report the value of wtmult in this field.
377 buf
->f_frsize
= dentry
->d_sb
->s_blocksize
;
380 * On most *nix systems, f_blocks, f_bfree, and f_bavail
381 * are reported in units of f_frsize. Linux hasn't had
382 * an f_frsize field in its statfs struct until recently,
383 * thus historically Linux's sys_statfs reports these
384 * fields in units of f_bsize.
386 buf
->f_bsize
= dentry
->d_sb
->s_blocksize
;
387 blockbits
= dentry
->d_sb
->s_blocksize_bits
;
388 blockres
= (1 << blockbits
) - 1;
389 buf
->f_blocks
= (res
.tbytes
+ blockres
) >> blockbits
;
390 buf
->f_bfree
= (res
.fbytes
+ blockres
) >> blockbits
;
391 buf
->f_bavail
= (res
.abytes
+ blockres
) >> blockbits
;
393 buf
->f_files
= res
.tfiles
;
394 buf
->f_ffree
= res
.afiles
;
396 buf
->f_namelen
= server
->namelen
;
402 dprintk("%s: statfs error = %d\n", __FUNCTION__
, -error
);
408 * Map the security flavour number to a name
410 static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour
)
412 static const struct {
413 rpc_authflavor_t flavour
;
416 { RPC_AUTH_NULL
, "null" },
417 { RPC_AUTH_UNIX
, "sys" },
418 { RPC_AUTH_GSS_KRB5
, "krb5" },
419 { RPC_AUTH_GSS_KRB5I
, "krb5i" },
420 { RPC_AUTH_GSS_KRB5P
, "krb5p" },
421 { RPC_AUTH_GSS_LKEY
, "lkey" },
422 { RPC_AUTH_GSS_LKEYI
, "lkeyi" },
423 { RPC_AUTH_GSS_LKEYP
, "lkeyp" },
424 { RPC_AUTH_GSS_SPKM
, "spkm" },
425 { RPC_AUTH_GSS_SPKMI
, "spkmi" },
426 { RPC_AUTH_GSS_SPKMP
, "spkmp" },
427 { UINT_MAX
, "unknown" }
431 for (i
= 0; sec_flavours
[i
].flavour
!= UINT_MAX
; i
++) {
432 if (sec_flavours
[i
].flavour
== flavour
)
435 return sec_flavours
[i
].str
;
439 * Describe the mount options in force on this server representation
441 static void nfs_show_mount_options(struct seq_file
*m
, struct nfs_server
*nfss
, int showdefaults
)
443 static const struct proc_nfs_info
{
448 { NFS_MOUNT_SOFT
, ",soft", ",hard" },
449 { NFS_MOUNT_INTR
, ",intr", ",nointr" },
450 { NFS_MOUNT_NOCTO
, ",nocto", "" },
451 { NFS_MOUNT_NOAC
, ",noac", "" },
452 { NFS_MOUNT_NONLM
, ",nolock", "" },
453 { NFS_MOUNT_NOACL
, ",noacl", "" },
454 { NFS_MOUNT_NORDIRPLUS
, ",nordirplus", "" },
455 { NFS_MOUNT_UNSHARED
, ",nosharecache", ""},
458 const struct proc_nfs_info
*nfs_infop
;
459 struct nfs_client
*clp
= nfss
->nfs_client
;
461 seq_printf(m
, ",vers=%d", clp
->rpc_ops
->version
);
462 seq_printf(m
, ",rsize=%d", nfss
->rsize
);
463 seq_printf(m
, ",wsize=%d", nfss
->wsize
);
464 if (nfss
->acregmin
!= 3*HZ
|| showdefaults
)
465 seq_printf(m
, ",acregmin=%d", nfss
->acregmin
/HZ
);
466 if (nfss
->acregmax
!= 60*HZ
|| showdefaults
)
467 seq_printf(m
, ",acregmax=%d", nfss
->acregmax
/HZ
);
468 if (nfss
->acdirmin
!= 30*HZ
|| showdefaults
)
469 seq_printf(m
, ",acdirmin=%d", nfss
->acdirmin
/HZ
);
470 if (nfss
->acdirmax
!= 60*HZ
|| showdefaults
)
471 seq_printf(m
, ",acdirmax=%d", nfss
->acdirmax
/HZ
);
472 for (nfs_infop
= nfs_info
; nfs_infop
->flag
; nfs_infop
++) {
473 if (nfss
->flags
& nfs_infop
->flag
)
474 seq_puts(m
, nfs_infop
->str
);
476 seq_puts(m
, nfs_infop
->nostr
);
478 seq_printf(m
, ",proto=%s",
479 rpc_peeraddr2str(nfss
->client
, RPC_DISPLAY_PROTO
));
480 seq_printf(m
, ",timeo=%lu", 10U * clp
->retrans_timeo
/ HZ
);
481 seq_printf(m
, ",retrans=%u", clp
->retrans_count
);
482 seq_printf(m
, ",sec=%s", nfs_pseudoflavour_to_name(nfss
->client
->cl_auth
->au_flavor
));
486 * Describe the mount options on this VFS mountpoint
488 static int nfs_show_options(struct seq_file
*m
, struct vfsmount
*mnt
)
490 struct nfs_server
*nfss
= NFS_SB(mnt
->mnt_sb
);
492 nfs_show_mount_options(m
, nfss
, 0);
494 seq_printf(m
, ",addr="NIPQUAD_FMT
,
495 NIPQUAD(nfss
->nfs_client
->cl_addr
.sin_addr
));
501 * Present statistical information for this VFS mountpoint
503 static int nfs_show_stats(struct seq_file
*m
, struct vfsmount
*mnt
)
506 struct nfs_server
*nfss
= NFS_SB(mnt
->mnt_sb
);
507 struct rpc_auth
*auth
= nfss
->client
->cl_auth
;
508 struct nfs_iostats totals
= { };
510 seq_printf(m
, "statvers=%s", NFS_IOSTAT_VERS
);
513 * Display all mount option settings
515 seq_printf(m
, "\n\topts:\t");
516 seq_puts(m
, mnt
->mnt_sb
->s_flags
& MS_RDONLY
? "ro" : "rw");
517 seq_puts(m
, mnt
->mnt_sb
->s_flags
& MS_SYNCHRONOUS
? ",sync" : "");
518 seq_puts(m
, mnt
->mnt_sb
->s_flags
& MS_NOATIME
? ",noatime" : "");
519 seq_puts(m
, mnt
->mnt_sb
->s_flags
& MS_NODIRATIME
? ",nodiratime" : "");
520 nfs_show_mount_options(m
, nfss
, 1);
522 seq_printf(m
, "\n\tage:\t%lu", (jiffies
- nfss
->mount_time
) / HZ
);
524 seq_printf(m
, "\n\tcaps:\t");
525 seq_printf(m
, "caps=0x%x", nfss
->caps
);
526 seq_printf(m
, ",wtmult=%d", nfss
->wtmult
);
527 seq_printf(m
, ",dtsize=%d", nfss
->dtsize
);
528 seq_printf(m
, ",bsize=%d", nfss
->bsize
);
529 seq_printf(m
, ",namelen=%d", nfss
->namelen
);
532 if (nfss
->nfs_client
->rpc_ops
->version
== 4) {
533 seq_printf(m
, "\n\tnfsv4:\t");
534 seq_printf(m
, "bm0=0x%x", nfss
->attr_bitmask
[0]);
535 seq_printf(m
, ",bm1=0x%x", nfss
->attr_bitmask
[1]);
536 seq_printf(m
, ",acl=0x%x", nfss
->acl_bitmask
);
541 * Display security flavor in effect for this mount
543 seq_printf(m
, "\n\tsec:\tflavor=%d", auth
->au_ops
->au_flavor
);
545 seq_printf(m
, ",pseudoflavor=%d", auth
->au_flavor
);
548 * Display superblock I/O counters
550 for_each_possible_cpu(cpu
) {
551 struct nfs_iostats
*stats
;
554 stats
= per_cpu_ptr(nfss
->io_stats
, cpu
);
556 for (i
= 0; i
< __NFSIOS_COUNTSMAX
; i
++)
557 totals
.events
[i
] += stats
->events
[i
];
558 for (i
= 0; i
< __NFSIOS_BYTESMAX
; i
++)
559 totals
.bytes
[i
] += stats
->bytes
[i
];
564 seq_printf(m
, "\n\tevents:\t");
565 for (i
= 0; i
< __NFSIOS_COUNTSMAX
; i
++)
566 seq_printf(m
, "%lu ", totals
.events
[i
]);
567 seq_printf(m
, "\n\tbytes:\t");
568 for (i
= 0; i
< __NFSIOS_BYTESMAX
; i
++)
569 seq_printf(m
, "%Lu ", totals
.bytes
[i
]);
572 rpc_print_iostats(m
, nfss
->client
);
578 * Begin unmount by attempting to remove all automounted mountpoints we added
579 * in response to xdev traversals and referrals
581 static void nfs_umount_begin(struct vfsmount
*vfsmnt
, int flags
)
583 struct nfs_server
*server
= NFS_SB(vfsmnt
->mnt_sb
);
584 struct rpc_clnt
*rpc
;
586 shrink_submounts(vfsmnt
, &nfs_automount_list
);
588 if (!(flags
& MNT_FORCE
))
590 /* -EIO all pending I/O */
591 rpc
= server
->client_acl
;
593 rpc_killall_tasks(rpc
);
594 rpc
= server
->client
;
596 rpc_killall_tasks(rpc
);
600 * Sanity-check a server address provided by the mount command
602 static int nfs_verify_server_address(struct sockaddr
*addr
)
604 switch (addr
->sa_family
) {
606 struct sockaddr_in
*sa
= (struct sockaddr_in
*) addr
;
607 if (sa
->sin_addr
.s_addr
!= INADDR_ANY
)
617 * Error-check and convert a string of mount options from user space into
620 static int nfs_parse_mount_options(char *raw
,
621 struct nfs_parsed_mount_data
*mnt
)
626 dfprintk(MOUNT
, "NFS: mount options string was NULL.\n");
629 dfprintk(MOUNT
, "NFS: nfs mount opts='%s'\n", raw
);
631 while ((p
= strsep(&raw
, ",")) != NULL
) {
632 substring_t args
[MAX_OPT_ARGS
];
638 dfprintk(MOUNT
, "NFS: parsing nfs mount option '%s'\n", p
);
640 token
= match_token(p
, nfs_mount_option_tokens
, args
);
643 mnt
->flags
|= NFS_MOUNT_SOFT
;
646 mnt
->flags
&= ~NFS_MOUNT_SOFT
;
649 mnt
->flags
|= NFS_MOUNT_INTR
;
652 mnt
->flags
&= ~NFS_MOUNT_INTR
;
655 mnt
->flags
|= NFS_MOUNT_POSIX
;
658 mnt
->flags
&= ~NFS_MOUNT_POSIX
;
661 mnt
->flags
&= ~NFS_MOUNT_NOCTO
;
664 mnt
->flags
|= NFS_MOUNT_NOCTO
;
667 mnt
->flags
&= ~NFS_MOUNT_NOAC
;
670 mnt
->flags
|= NFS_MOUNT_NOAC
;
673 mnt
->flags
&= ~NFS_MOUNT_NONLM
;
676 mnt
->flags
|= NFS_MOUNT_NONLM
;
679 mnt
->flags
&= ~NFS_MOUNT_VER3
;
682 mnt
->flags
|= NFS_MOUNT_VER3
;
685 mnt
->flags
&= ~NFS_MOUNT_TCP
;
686 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_UDP
;
691 mnt
->flags
|= NFS_MOUNT_TCP
;
692 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
697 mnt
->flags
|= NFS_MOUNT_TCP
; /* for side protocols */
698 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_RDMA
;
703 mnt
->flags
&= ~NFS_MOUNT_NOACL
;
706 mnt
->flags
|= NFS_MOUNT_NOACL
;
709 mnt
->flags
&= ~NFS_MOUNT_NORDIRPLUS
;
712 mnt
->flags
|= NFS_MOUNT_NORDIRPLUS
;
715 mnt
->flags
&= ~NFS_MOUNT_UNSHARED
;
717 case Opt_nosharecache
:
718 mnt
->flags
|= NFS_MOUNT_UNSHARED
;
722 if (match_int(args
, &option
))
724 if (option
< 0 || option
> 65535)
726 mnt
->nfs_server
.address
.sin_port
= htons(option
);
729 if (match_int(args
, &mnt
->rsize
))
733 if (match_int(args
, &mnt
->wsize
))
737 if (match_int(args
, &option
))
744 if (match_int(args
, &mnt
->timeo
))
748 if (match_int(args
, &mnt
->retrans
))
752 if (match_int(args
, &mnt
->acregmin
))
756 if (match_int(args
, &mnt
->acregmax
))
760 if (match_int(args
, &mnt
->acdirmin
))
764 if (match_int(args
, &mnt
->acdirmax
))
768 if (match_int(args
, &option
))
775 mnt
->acdirmax
= option
;
778 if (match_int(args
, &mnt
->namlen
))
782 if (match_int(args
, &option
))
784 if (option
< 0 || option
> 65535)
786 mnt
->mount_server
.port
= option
;
789 if (match_int(args
, &option
))
793 mnt
->mount_server
.version
= option
;
796 if (match_int(args
, &option
))
800 mnt
->flags
&= ~NFS_MOUNT_VER3
;
803 mnt
->flags
|= NFS_MOUNT_VER3
;
811 string
= match_strdup(args
);
814 token
= match_token(string
, nfs_secflavor_tokens
, args
);
818 * The flags setting is for v2/v3. The flavor_len
819 * setting is for v4. v2/v3 also need to know the
820 * difference between NULL and UNIX.
824 mnt
->flags
&= ~NFS_MOUNT_SECFLAVOUR
;
825 mnt
->auth_flavor_len
= 0;
826 mnt
->auth_flavors
[0] = RPC_AUTH_NULL
;
829 mnt
->flags
&= ~NFS_MOUNT_SECFLAVOUR
;
830 mnt
->auth_flavor_len
= 0;
831 mnt
->auth_flavors
[0] = RPC_AUTH_UNIX
;
834 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
835 mnt
->auth_flavor_len
= 1;
836 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_KRB5
;
839 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
840 mnt
->auth_flavor_len
= 1;
841 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_KRB5I
;
844 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
845 mnt
->auth_flavor_len
= 1;
846 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_KRB5P
;
849 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
850 mnt
->auth_flavor_len
= 1;
851 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_LKEY
;
854 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
855 mnt
->auth_flavor_len
= 1;
856 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_LKEYI
;
859 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
860 mnt
->auth_flavor_len
= 1;
861 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_LKEYP
;
864 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
865 mnt
->auth_flavor_len
= 1;
866 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_SPKM
;
869 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
870 mnt
->auth_flavor_len
= 1;
871 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_SPKMI
;
874 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
875 mnt
->auth_flavor_len
= 1;
876 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_SPKMP
;
883 string
= match_strdup(args
);
886 token
= match_token(string
,
887 nfs_xprt_protocol_tokens
, args
);
892 mnt
->flags
&= ~NFS_MOUNT_TCP
;
893 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_UDP
;
898 mnt
->flags
|= NFS_MOUNT_TCP
;
899 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
904 /* vector side protocols to TCP */
905 mnt
->flags
|= NFS_MOUNT_TCP
;
906 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_RDMA
;
915 string
= match_strdup(args
);
918 token
= match_token(string
,
919 nfs_xprt_protocol_tokens
, args
);
924 mnt
->mount_server
.protocol
= XPRT_TRANSPORT_UDP
;
927 mnt
->mount_server
.protocol
= XPRT_TRANSPORT_TCP
;
929 case Opt_xprt_rdma
: /* not used for side protocols */
935 string
= match_strdup(args
);
938 mnt
->nfs_server
.address
.sin_family
= AF_INET
;
939 mnt
->nfs_server
.address
.sin_addr
.s_addr
=
944 string
= match_strdup(args
);
947 mnt
->client_address
= string
;
950 string
= match_strdup(args
);
953 mnt
->mount_server
.address
.sin_family
= AF_INET
;
954 mnt
->mount_server
.address
.sin_addr
.s_addr
=
971 printk(KERN_INFO
"NFS: not enough memory to parse option\n");
975 printk(KERN_INFO
"NFS: unrecognized NFS version number\n");
979 printk(KERN_INFO
"NFS: unrecognized transport protocol\n");
983 printk(KERN_INFO
"NFS: unrecognized security flavor\n");
987 printk(KERN_INFO
"NFS: unknown mount option: %s\n", p
);
992 * Use the remote server's MOUNT service to request the NFS file handle
993 * corresponding to the provided path.
995 static int nfs_try_mount(struct nfs_parsed_mount_data
*args
,
996 struct nfs_fh
*root_fh
)
998 struct sockaddr_in sin
;
1001 if (args
->mount_server
.version
== 0) {
1002 if (args
->flags
& NFS_MOUNT_VER3
)
1003 args
->mount_server
.version
= NFS_MNT3_VERSION
;
1005 args
->mount_server
.version
= NFS_MNT_VERSION
;
1009 * Construct the mount server's address.
1011 if (args
->mount_server
.address
.sin_addr
.s_addr
!= INADDR_ANY
)
1012 sin
= args
->mount_server
.address
;
1014 sin
= args
->nfs_server
.address
;
1016 * autobind will be used if mount_server.port == 0
1018 sin
.sin_port
= htons(args
->mount_server
.port
);
1021 * Now ask the mount server to map our export path
1024 status
= nfs_mount((struct sockaddr
*) &sin
,
1026 args
->nfs_server
.hostname
,
1027 args
->nfs_server
.export_path
,
1028 args
->mount_server
.version
,
1029 args
->mount_server
.protocol
,
1034 dfprintk(MOUNT
, "NFS: unable to mount server " NIPQUAD_FMT
1035 ", error %d\n", NIPQUAD(sin
.sin_addr
.s_addr
), status
);
1040 * Validate the NFS2/NFS3 mount data
1041 * - fills in the mount root filehandle
1043 * For option strings, user space handles the following behaviors:
1045 * + DNS: mapping server host name to IP address ("addr=" option)
1047 * + failure mode: how to behave if a mount request can't be handled
1048 * immediately ("fg/bg" option)
1050 * + retry: how often to retry a mount request ("retry=" option)
1052 * + breaking back: trying proto=udp after proto=tcp, v2 after v3,
1053 * mountproto=tcp after mountproto=udp, and so on
1055 static int nfs_validate_mount_data(void *options
,
1056 struct nfs_parsed_mount_data
*args
,
1057 struct nfs_fh
*mntfh
,
1058 const char *dev_name
)
1060 struct nfs_mount_data
*data
= (struct nfs_mount_data
*)options
;
1062 memset(args
, 0, sizeof(*args
));
1067 args
->flags
= (NFS_MOUNT_VER3
| NFS_MOUNT_TCP
);
1068 args
->rsize
= NFS_MAX_FILE_IO_SIZE
;
1069 args
->wsize
= NFS_MAX_FILE_IO_SIZE
;
1073 args
->acregmax
= 60;
1074 args
->acdirmin
= 30;
1075 args
->acdirmax
= 60;
1076 args
->mount_server
.protocol
= XPRT_TRANSPORT_UDP
;
1077 args
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
1079 switch (data
->version
) {
1085 if (data
->flags
& NFS_MOUNT_VER3
)
1087 data
->root
.size
= NFS2_FHSIZE
;
1088 memcpy(data
->root
.data
, data
->old_root
.data
, NFS2_FHSIZE
);
1090 if (data
->flags
& NFS_MOUNT_SECFLAVOUR
)
1093 memset(data
->context
, 0, sizeof(data
->context
));
1095 if (data
->flags
& NFS_MOUNT_VER3
)
1096 mntfh
->size
= data
->root
.size
;
1098 mntfh
->size
= NFS2_FHSIZE
;
1100 if (mntfh
->size
> sizeof(mntfh
->data
))
1101 goto out_invalid_fh
;
1103 memcpy(mntfh
->data
, data
->root
.data
, mntfh
->size
);
1104 if (mntfh
->size
< sizeof(mntfh
->data
))
1105 memset(mntfh
->data
+ mntfh
->size
, 0,
1106 sizeof(mntfh
->data
) - mntfh
->size
);
1108 if (!nfs_verify_server_address((struct sockaddr
*) &data
->addr
))
1109 goto out_no_address
;
1112 * Translate to nfs_parsed_mount_data, which nfs_fill_super
1115 args
->flags
= data
->flags
;
1116 args
->rsize
= data
->rsize
;
1117 args
->wsize
= data
->wsize
;
1118 args
->flags
= data
->flags
;
1119 args
->timeo
= data
->timeo
;
1120 args
->retrans
= data
->retrans
;
1121 args
->acregmin
= data
->acregmin
;
1122 args
->acregmax
= data
->acregmax
;
1123 args
->acdirmin
= data
->acdirmin
;
1124 args
->acdirmax
= data
->acdirmax
;
1125 args
->nfs_server
.address
= data
->addr
;
1126 if (!(data
->flags
& NFS_MOUNT_TCP
))
1127 args
->nfs_server
.protocol
= XPRT_TRANSPORT_UDP
;
1128 /* N.B. caller will free nfs_server.hostname in all cases */
1129 args
->nfs_server
.hostname
= kstrdup(data
->hostname
, GFP_KERNEL
);
1130 args
->namlen
= data
->namlen
;
1131 args
->bsize
= data
->bsize
;
1132 args
->auth_flavors
[0] = data
->pseudoflavor
;
1139 if (nfs_parse_mount_options((char *)options
, args
) == 0)
1142 if (!nfs_verify_server_address((struct sockaddr
*)
1143 &args
->nfs_server
.address
))
1144 goto out_no_address
;
1146 c
= strchr(dev_name
, ':');
1150 /* N.B. caller will free nfs_server.hostname in all cases */
1151 args
->nfs_server
.hostname
= kstrndup(dev_name
, len
, GFP_KERNEL
);
1154 if (strlen(c
) > NFS_MAXPATHLEN
)
1155 return -ENAMETOOLONG
;
1156 args
->nfs_server
.export_path
= c
;
1158 status
= nfs_try_mount(args
, mntfh
);
1166 if (!(args
->flags
& NFS_MOUNT_SECFLAVOUR
))
1167 args
->auth_flavors
[0] = RPC_AUTH_UNIX
;
1169 #ifndef CONFIG_NFS_V3
1170 if (args
->flags
& NFS_MOUNT_VER3
)
1171 goto out_v3_not_compiled
;
1172 #endif /* !CONFIG_NFS_V3 */
1177 dfprintk(MOUNT
, "NFS: mount program didn't pass any mount data\n");
1181 dfprintk(MOUNT
, "NFS: nfs_mount_data version %d does not support v3\n",
1186 dfprintk(MOUNT
, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
1189 #ifndef CONFIG_NFS_V3
1190 out_v3_not_compiled
:
1191 dfprintk(MOUNT
, "NFS: NFSv3 is not compiled into kernel\n");
1192 return -EPROTONOSUPPORT
;
1193 #endif /* !CONFIG_NFS_V3 */
1196 dfprintk(MOUNT
, "NFS: mount program didn't pass remote address\n");
1200 dfprintk(MOUNT
, "NFS: invalid root filehandle\n");
1205 * Initialise the common bits of the superblock
1207 static inline void nfs_initialise_sb(struct super_block
*sb
)
1209 struct nfs_server
*server
= NFS_SB(sb
);
1211 sb
->s_magic
= NFS_SUPER_MAGIC
;
1213 /* We probably want something more informative here */
1214 snprintf(sb
->s_id
, sizeof(sb
->s_id
),
1215 "%x:%x", MAJOR(sb
->s_dev
), MINOR(sb
->s_dev
));
1217 if (sb
->s_blocksize
== 0)
1218 sb
->s_blocksize
= nfs_block_bits(server
->wsize
,
1219 &sb
->s_blocksize_bits
);
1221 if (server
->flags
& NFS_MOUNT_NOAC
)
1222 sb
->s_flags
|= MS_SYNCHRONOUS
;
1224 nfs_super_set_maxbytes(sb
, server
->maxfilesize
);
1228 * Finish setting up an NFS2/3 superblock
1230 static void nfs_fill_super(struct super_block
*sb
,
1231 struct nfs_parsed_mount_data
*data
)
1233 struct nfs_server
*server
= NFS_SB(sb
);
1235 sb
->s_blocksize_bits
= 0;
1236 sb
->s_blocksize
= 0;
1238 sb
->s_blocksize
= nfs_block_size(data
->bsize
, &sb
->s_blocksize_bits
);
1240 if (server
->flags
& NFS_MOUNT_VER3
) {
1241 /* The VFS shouldn't apply the umask to mode bits. We will do
1242 * so ourselves when necessary.
1244 sb
->s_flags
|= MS_POSIXACL
;
1245 sb
->s_time_gran
= 1;
1248 sb
->s_op
= &nfs_sops
;
1249 nfs_initialise_sb(sb
);
1253 * Finish setting up a cloned NFS2/3 superblock
1255 static void nfs_clone_super(struct super_block
*sb
,
1256 const struct super_block
*old_sb
)
1258 struct nfs_server
*server
= NFS_SB(sb
);
1260 sb
->s_blocksize_bits
= old_sb
->s_blocksize_bits
;
1261 sb
->s_blocksize
= old_sb
->s_blocksize
;
1262 sb
->s_maxbytes
= old_sb
->s_maxbytes
;
1264 if (server
->flags
& NFS_MOUNT_VER3
) {
1265 /* The VFS shouldn't apply the umask to mode bits. We will do
1266 * so ourselves when necessary.
1268 sb
->s_flags
|= MS_POSIXACL
;
1269 sb
->s_time_gran
= 1;
1272 sb
->s_op
= old_sb
->s_op
;
1273 nfs_initialise_sb(sb
);
1276 #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
1278 static int nfs_compare_mount_options(const struct super_block
*s
, const struct nfs_server
*b
, int flags
)
1280 const struct nfs_server
*a
= s
->s_fs_info
;
1281 const struct rpc_clnt
*clnt_a
= a
->client
;
1282 const struct rpc_clnt
*clnt_b
= b
->client
;
1284 if ((s
->s_flags
& NFS_MS_MASK
) != (flags
& NFS_MS_MASK
))
1286 if (a
->nfs_client
!= b
->nfs_client
)
1288 if (a
->flags
!= b
->flags
)
1290 if (a
->wsize
!= b
->wsize
)
1292 if (a
->rsize
!= b
->rsize
)
1294 if (a
->acregmin
!= b
->acregmin
)
1296 if (a
->acregmax
!= b
->acregmax
)
1298 if (a
->acdirmin
!= b
->acdirmin
)
1300 if (a
->acdirmax
!= b
->acdirmax
)
1302 if (clnt_a
->cl_auth
->au_flavor
!= clnt_b
->cl_auth
->au_flavor
)
1309 struct nfs_sb_mountdata
{
1310 struct nfs_server
*server
;
1314 static int nfs_set_super(struct super_block
*s
, void *data
)
1316 struct nfs_sb_mountdata
*sb_mntdata
= data
;
1317 struct nfs_server
*server
= sb_mntdata
->server
;
1320 s
->s_flags
= sb_mntdata
->mntflags
;
1321 s
->s_fs_info
= server
;
1322 ret
= set_anon_super(s
, server
);
1324 server
->s_dev
= s
->s_dev
;
1328 static int nfs_compare_super(struct super_block
*sb
, void *data
)
1330 struct nfs_sb_mountdata
*sb_mntdata
= data
;
1331 struct nfs_server
*server
= sb_mntdata
->server
, *old
= NFS_SB(sb
);
1332 int mntflags
= sb_mntdata
->mntflags
;
1334 if (memcmp(&old
->nfs_client
->cl_addr
,
1335 &server
->nfs_client
->cl_addr
,
1336 sizeof(old
->nfs_client
->cl_addr
)) != 0)
1338 /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */
1339 if (old
->flags
& NFS_MOUNT_UNSHARED
)
1341 if (memcmp(&old
->fsid
, &server
->fsid
, sizeof(old
->fsid
)) != 0)
1343 return nfs_compare_mount_options(sb
, server
, mntflags
);
1346 static int nfs_get_sb(struct file_system_type
*fs_type
,
1347 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
)
1349 struct nfs_server
*server
= NULL
;
1350 struct super_block
*s
;
1351 struct nfs_fh mntfh
;
1352 struct nfs_parsed_mount_data data
;
1353 struct dentry
*mntroot
;
1354 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
1355 struct nfs_sb_mountdata sb_mntdata
= {
1360 /* Validate the mount data */
1361 error
= nfs_validate_mount_data(raw_data
, &data
, &mntfh
, dev_name
);
1365 /* Get a volume representation */
1366 server
= nfs_create_server(&data
, &mntfh
);
1367 if (IS_ERR(server
)) {
1368 error
= PTR_ERR(server
);
1371 sb_mntdata
.server
= server
;
1373 if (server
->flags
& NFS_MOUNT_UNSHARED
)
1374 compare_super
= NULL
;
1376 /* Get a superblock - note that we may end up sharing one that already exists */
1377 s
= sget(fs_type
, compare_super
, nfs_set_super
, &sb_mntdata
);
1383 if (s
->s_fs_info
!= server
) {
1384 nfs_free_server(server
);
1389 /* initial superblock/root creation */
1390 nfs_fill_super(s
, &data
);
1393 mntroot
= nfs_get_root(s
, &mntfh
);
1394 if (IS_ERR(mntroot
)) {
1395 error
= PTR_ERR(mntroot
);
1396 goto error_splat_super
;
1399 s
->s_flags
|= MS_ACTIVE
;
1401 mnt
->mnt_root
= mntroot
;
1405 kfree(data
.nfs_server
.hostname
);
1409 nfs_free_server(server
);
1413 up_write(&s
->s_umount
);
1414 deactivate_super(s
);
1419 * Destroy an NFS2/3 superblock
1421 static void nfs_kill_super(struct super_block
*s
)
1423 struct nfs_server
*server
= NFS_SB(s
);
1426 nfs_free_server(server
);
1430 * Clone an NFS2/3 server record on xdev traversal (FSID-change)
1432 static int nfs_xdev_get_sb(struct file_system_type
*fs_type
, int flags
,
1433 const char *dev_name
, void *raw_data
,
1434 struct vfsmount
*mnt
)
1436 struct nfs_clone_mount
*data
= raw_data
;
1437 struct super_block
*s
;
1438 struct nfs_server
*server
;
1439 struct dentry
*mntroot
;
1440 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
1441 struct nfs_sb_mountdata sb_mntdata
= {
1446 dprintk("--> nfs_xdev_get_sb()\n");
1448 /* create a new volume representation */
1449 server
= nfs_clone_server(NFS_SB(data
->sb
), data
->fh
, data
->fattr
);
1450 if (IS_ERR(server
)) {
1451 error
= PTR_ERR(server
);
1452 goto out_err_noserver
;
1454 sb_mntdata
.server
= server
;
1456 if (server
->flags
& NFS_MOUNT_UNSHARED
)
1457 compare_super
= NULL
;
1459 /* Get a superblock - note that we may end up sharing one that already exists */
1460 s
= sget(&nfs_fs_type
, compare_super
, nfs_set_super
, &sb_mntdata
);
1466 if (s
->s_fs_info
!= server
) {
1467 nfs_free_server(server
);
1472 /* initial superblock/root creation */
1473 nfs_clone_super(s
, data
->sb
);
1476 mntroot
= nfs_get_root(s
, data
->fh
);
1477 if (IS_ERR(mntroot
)) {
1478 error
= PTR_ERR(mntroot
);
1479 goto error_splat_super
;
1481 if (mntroot
->d_inode
->i_op
!= NFS_SB(s
)->nfs_client
->rpc_ops
->dir_inode_ops
) {
1484 goto error_splat_super
;
1487 s
->s_flags
|= MS_ACTIVE
;
1489 mnt
->mnt_root
= mntroot
;
1491 dprintk("<-- nfs_xdev_get_sb() = 0\n");
1495 nfs_free_server(server
);
1497 dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error
);
1501 up_write(&s
->s_umount
);
1502 deactivate_super(s
);
1503 dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error
);
1507 #ifdef CONFIG_NFS_V4
1510 * Finish setting up a cloned NFS4 superblock
1512 static void nfs4_clone_super(struct super_block
*sb
,
1513 const struct super_block
*old_sb
)
1515 sb
->s_blocksize_bits
= old_sb
->s_blocksize_bits
;
1516 sb
->s_blocksize
= old_sb
->s_blocksize
;
1517 sb
->s_maxbytes
= old_sb
->s_maxbytes
;
1518 sb
->s_time_gran
= 1;
1519 sb
->s_op
= old_sb
->s_op
;
1520 nfs_initialise_sb(sb
);
1524 * Set up an NFS4 superblock
1526 static void nfs4_fill_super(struct super_block
*sb
)
1528 sb
->s_time_gran
= 1;
1529 sb
->s_op
= &nfs4_sops
;
1530 nfs_initialise_sb(sb
);
1534 * Validate NFSv4 mount options
1536 static int nfs4_validate_mount_data(void *options
,
1537 struct nfs_parsed_mount_data
*args
,
1538 const char *dev_name
)
1540 struct nfs4_mount_data
*data
= (struct nfs4_mount_data
*)options
;
1543 memset(args
, 0, sizeof(*args
));
1548 args
->rsize
= NFS_MAX_FILE_IO_SIZE
;
1549 args
->wsize
= NFS_MAX_FILE_IO_SIZE
;
1553 args
->acregmax
= 60;
1554 args
->acdirmin
= 30;
1555 args
->acdirmax
= 60;
1556 args
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
1558 switch (data
->version
) {
1560 if (data
->host_addrlen
!= sizeof(args
->nfs_server
.address
))
1561 goto out_no_address
;
1562 if (copy_from_user(&args
->nfs_server
.address
,
1564 sizeof(args
->nfs_server
.address
)))
1566 if (args
->nfs_server
.address
.sin_port
== 0)
1567 args
->nfs_server
.address
.sin_port
= htons(NFS_PORT
);
1568 if (!nfs_verify_server_address((struct sockaddr
*)
1569 &args
->nfs_server
.address
))
1570 goto out_no_address
;
1572 switch (data
->auth_flavourlen
) {
1574 args
->auth_flavors
[0] = RPC_AUTH_UNIX
;
1577 if (copy_from_user(&args
->auth_flavors
[0],
1578 data
->auth_flavours
,
1579 sizeof(args
->auth_flavors
[0])))
1583 goto out_inval_auth
;
1586 c
= strndup_user(data
->hostname
.data
, NFS4_MAXNAMLEN
);
1589 args
->nfs_server
.hostname
= c
;
1591 c
= strndup_user(data
->mnt_path
.data
, NFS4_MAXPATHLEN
);
1594 args
->nfs_server
.export_path
= c
;
1595 dfprintk(MOUNT
, "NFS: MNTPATH: '%s'\n", c
);
1597 c
= strndup_user(data
->client_addr
.data
, 16);
1600 args
->client_address
= c
;
1603 * Translate to nfs_parsed_mount_data, which nfs4_fill_super
1607 args
->flags
= data
->flags
& NFS4_MOUNT_FLAGMASK
;
1608 args
->rsize
= data
->rsize
;
1609 args
->wsize
= data
->wsize
;
1610 args
->timeo
= data
->timeo
;
1611 args
->retrans
= data
->retrans
;
1612 args
->acregmin
= data
->acregmin
;
1613 args
->acregmax
= data
->acregmax
;
1614 args
->acdirmin
= data
->acdirmin
;
1615 args
->acdirmax
= data
->acdirmax
;
1616 args
->nfs_server
.protocol
= data
->proto
;
1622 if (nfs_parse_mount_options((char *)options
, args
) == 0)
1625 if (args
->nfs_server
.address
.sin_port
== 0)
1626 args
->nfs_server
.address
.sin_port
= htons(NFS_PORT
);
1627 if (!nfs_verify_server_address((struct sockaddr
*)
1628 &args
->nfs_server
.address
))
1631 switch (args
->auth_flavor_len
) {
1633 args
->auth_flavors
[0] = RPC_AUTH_UNIX
;
1638 goto out_inval_auth
;
1642 * Split "dev_name" into "hostname:mntpath".
1644 c
= strchr(dev_name
, ':');
1647 /* while calculating len, pretend ':' is '\0' */
1649 if (len
> NFS4_MAXNAMLEN
)
1650 return -ENAMETOOLONG
;
1651 /* N.B. caller will free nfs_server.hostname in all cases */
1652 args
->nfs_server
.hostname
= kstrndup(dev_name
, len
, GFP_KERNEL
);
1654 c
++; /* step over the ':' */
1656 if (len
> NFS4_MAXPATHLEN
)
1657 return -ENAMETOOLONG
;
1658 args
->nfs_server
.export_path
= kstrndup(c
, len
, GFP_KERNEL
);
1660 dprintk("NFS: MNTPATH: '%s'\n", args
->nfs_server
.export_path
);
1662 if (args
->client_address
== NULL
)
1663 goto out_no_client_address
;
1672 dfprintk(MOUNT
, "NFS4: mount program didn't pass any mount data\n");
1676 dfprintk(MOUNT
, "NFS4: Invalid number of RPC auth flavours %d\n",
1677 data
->auth_flavourlen
);
1681 dfprintk(MOUNT
, "NFS4: mount program didn't pass remote address\n");
1684 out_no_client_address
:
1685 dfprintk(MOUNT
, "NFS4: mount program didn't pass callback address\n");
1690 * Get the superblock for an NFS4 mountpoint
1692 static int nfs4_get_sb(struct file_system_type
*fs_type
,
1693 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
)
1695 struct nfs_parsed_mount_data data
;
1696 struct super_block
*s
;
1697 struct nfs_server
*server
;
1698 struct nfs_fh mntfh
;
1699 struct dentry
*mntroot
;
1700 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
1701 struct nfs_sb_mountdata sb_mntdata
= {
1706 /* Validate the mount data */
1707 error
= nfs4_validate_mount_data(raw_data
, &data
, dev_name
);
1711 /* Get a volume representation */
1712 server
= nfs4_create_server(&data
, &mntfh
);
1713 if (IS_ERR(server
)) {
1714 error
= PTR_ERR(server
);
1717 sb_mntdata
.server
= server
;
1719 if (server
->flags
& NFS4_MOUNT_UNSHARED
)
1720 compare_super
= NULL
;
1722 /* Get a superblock - note that we may end up sharing one that already exists */
1723 s
= sget(fs_type
, compare_super
, nfs_set_super
, &sb_mntdata
);
1729 if (s
->s_fs_info
!= server
) {
1730 nfs_free_server(server
);
1735 /* initial superblock/root creation */
1739 mntroot
= nfs4_get_root(s
, &mntfh
);
1740 if (IS_ERR(mntroot
)) {
1741 error
= PTR_ERR(mntroot
);
1742 goto error_splat_super
;
1745 s
->s_flags
|= MS_ACTIVE
;
1747 mnt
->mnt_root
= mntroot
;
1751 kfree(data
.client_address
);
1752 kfree(data
.nfs_server
.export_path
);
1753 kfree(data
.nfs_server
.hostname
);
1757 nfs_free_server(server
);
1761 up_write(&s
->s_umount
);
1762 deactivate_super(s
);
1766 static void nfs4_kill_super(struct super_block
*sb
)
1768 struct nfs_server
*server
= NFS_SB(sb
);
1770 nfs_return_all_delegations(sb
);
1771 kill_anon_super(sb
);
1773 nfs4_renewd_prepare_shutdown(server
);
1774 nfs_free_server(server
);
1778 * Clone an NFS4 server record on xdev traversal (FSID-change)
1780 static int nfs4_xdev_get_sb(struct file_system_type
*fs_type
, int flags
,
1781 const char *dev_name
, void *raw_data
,
1782 struct vfsmount
*mnt
)
1784 struct nfs_clone_mount
*data
= raw_data
;
1785 struct super_block
*s
;
1786 struct nfs_server
*server
;
1787 struct dentry
*mntroot
;
1788 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
1789 struct nfs_sb_mountdata sb_mntdata
= {
1794 dprintk("--> nfs4_xdev_get_sb()\n");
1796 /* create a new volume representation */
1797 server
= nfs_clone_server(NFS_SB(data
->sb
), data
->fh
, data
->fattr
);
1798 if (IS_ERR(server
)) {
1799 error
= PTR_ERR(server
);
1800 goto out_err_noserver
;
1802 sb_mntdata
.server
= server
;
1804 if (server
->flags
& NFS4_MOUNT_UNSHARED
)
1805 compare_super
= NULL
;
1807 /* Get a superblock - note that we may end up sharing one that already exists */
1808 s
= sget(&nfs_fs_type
, compare_super
, nfs_set_super
, &sb_mntdata
);
1814 if (s
->s_fs_info
!= server
) {
1815 nfs_free_server(server
);
1820 /* initial superblock/root creation */
1821 nfs4_clone_super(s
, data
->sb
);
1824 mntroot
= nfs4_get_root(s
, data
->fh
);
1825 if (IS_ERR(mntroot
)) {
1826 error
= PTR_ERR(mntroot
);
1827 goto error_splat_super
;
1829 if (mntroot
->d_inode
->i_op
!= NFS_SB(s
)->nfs_client
->rpc_ops
->dir_inode_ops
) {
1832 goto error_splat_super
;
1835 s
->s_flags
|= MS_ACTIVE
;
1837 mnt
->mnt_root
= mntroot
;
1839 dprintk("<-- nfs4_xdev_get_sb() = 0\n");
1843 nfs_free_server(server
);
1845 dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error
);
1849 up_write(&s
->s_umount
);
1850 deactivate_super(s
);
1851 dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error
);
1856 * Create an NFS4 server record on referral traversal
1858 static int nfs4_referral_get_sb(struct file_system_type
*fs_type
, int flags
,
1859 const char *dev_name
, void *raw_data
,
1860 struct vfsmount
*mnt
)
1862 struct nfs_clone_mount
*data
= raw_data
;
1863 struct super_block
*s
;
1864 struct nfs_server
*server
;
1865 struct dentry
*mntroot
;
1866 struct nfs_fh mntfh
;
1867 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
1868 struct nfs_sb_mountdata sb_mntdata
= {
1873 dprintk("--> nfs4_referral_get_sb()\n");
1875 /* create a new volume representation */
1876 server
= nfs4_create_referral_server(data
, &mntfh
);
1877 if (IS_ERR(server
)) {
1878 error
= PTR_ERR(server
);
1879 goto out_err_noserver
;
1881 sb_mntdata
.server
= server
;
1883 if (server
->flags
& NFS4_MOUNT_UNSHARED
)
1884 compare_super
= NULL
;
1886 /* Get a superblock - note that we may end up sharing one that already exists */
1887 s
= sget(&nfs_fs_type
, compare_super
, nfs_set_super
, &sb_mntdata
);
1893 if (s
->s_fs_info
!= server
) {
1894 nfs_free_server(server
);
1899 /* initial superblock/root creation */
1903 mntroot
= nfs4_get_root(s
, &mntfh
);
1904 if (IS_ERR(mntroot
)) {
1905 error
= PTR_ERR(mntroot
);
1906 goto error_splat_super
;
1908 if (mntroot
->d_inode
->i_op
!= NFS_SB(s
)->nfs_client
->rpc_ops
->dir_inode_ops
) {
1911 goto error_splat_super
;
1914 s
->s_flags
|= MS_ACTIVE
;
1916 mnt
->mnt_root
= mntroot
;
1918 dprintk("<-- nfs4_referral_get_sb() = 0\n");
1922 nfs_free_server(server
);
1924 dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error
);
1928 up_write(&s
->s_umount
);
1929 deactivate_super(s
);
1930 dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error
);
1934 #endif /* CONFIG_NFS_V4 */