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/in6.h>
50 #include <linux/nfs_xdr.h>
51 #include <linux/magic.h>
52 #include <linux/parser.h>
54 #include <asm/system.h>
55 #include <asm/uaccess.h>
59 #include "delegation.h"
63 #define NFSDBG_FACILITY NFSDBG_VFS
66 /* Mount options that take no arguments */
69 Opt_posix
, Opt_noposix
,
74 Opt_udp
, Opt_tcp
, Opt_rdma
,
76 Opt_rdirplus
, Opt_nordirplus
,
77 Opt_sharecache
, Opt_nosharecache
,
79 /* Mount options that take integer arguments */
81 Opt_rsize
, Opt_wsize
, Opt_bsize
,
82 Opt_timeo
, Opt_retrans
,
83 Opt_acregmin
, Opt_acregmax
,
84 Opt_acdirmin
, Opt_acdirmax
,
91 /* Mount options that take string arguments */
92 Opt_sec
, Opt_proto
, Opt_mountproto
, Opt_mounthost
,
93 Opt_addr
, Opt_mountaddr
, Opt_clientaddr
,
95 /* Mount options that are ignored */
96 Opt_userspace
, Opt_deprecated
,
101 static match_table_t nfs_mount_option_tokens
= {
102 { Opt_userspace
, "bg" },
103 { Opt_userspace
, "fg" },
104 { Opt_soft
, "soft" },
105 { Opt_hard
, "hard" },
106 { Opt_intr
, "intr" },
107 { Opt_nointr
, "nointr" },
108 { Opt_posix
, "posix" },
109 { Opt_noposix
, "noposix" },
111 { Opt_nocto
, "nocto" },
113 { Opt_noac
, "noac" },
114 { Opt_lock
, "lock" },
115 { Opt_nolock
, "nolock" },
120 { Opt_rdma
, "rdma" },
122 { Opt_noacl
, "noacl" },
123 { Opt_rdirplus
, "rdirplus" },
124 { Opt_nordirplus
, "nordirplus" },
125 { Opt_sharecache
, "sharecache" },
126 { Opt_nosharecache
, "nosharecache" },
128 { Opt_port
, "port=%u" },
129 { Opt_rsize
, "rsize=%u" },
130 { Opt_wsize
, "wsize=%u" },
131 { Opt_bsize
, "bsize=%u" },
132 { Opt_timeo
, "timeo=%u" },
133 { Opt_retrans
, "retrans=%u" },
134 { Opt_acregmin
, "acregmin=%u" },
135 { Opt_acregmax
, "acregmax=%u" },
136 { Opt_acdirmin
, "acdirmin=%u" },
137 { Opt_acdirmax
, "acdirmax=%u" },
138 { Opt_actimeo
, "actimeo=%u" },
139 { Opt_userspace
, "retry=%u" },
140 { Opt_namelen
, "namlen=%u" },
141 { Opt_mountport
, "mountport=%u" },
142 { Opt_mountvers
, "mountvers=%u" },
143 { Opt_nfsvers
, "nfsvers=%u" },
144 { Opt_nfsvers
, "vers=%u" },
146 { Opt_sec
, "sec=%s" },
147 { Opt_proto
, "proto=%s" },
148 { Opt_mountproto
, "mountproto=%s" },
149 { Opt_addr
, "addr=%s" },
150 { Opt_clientaddr
, "clientaddr=%s" },
151 { Opt_mounthost
, "mounthost=%s" },
152 { Opt_mountaddr
, "mountaddr=%s" },
158 Opt_xprt_udp
, Opt_xprt_tcp
, Opt_xprt_rdma
,
163 static match_table_t nfs_xprt_protocol_tokens
= {
164 { Opt_xprt_udp
, "udp" },
165 { Opt_xprt_tcp
, "tcp" },
166 { Opt_xprt_rdma
, "rdma" },
168 { Opt_xprt_err
, NULL
}
172 Opt_sec_none
, Opt_sec_sys
,
173 Opt_sec_krb5
, Opt_sec_krb5i
, Opt_sec_krb5p
,
174 Opt_sec_lkey
, Opt_sec_lkeyi
, Opt_sec_lkeyp
,
175 Opt_sec_spkm
, Opt_sec_spkmi
, Opt_sec_spkmp
,
180 static match_table_t nfs_secflavor_tokens
= {
181 { Opt_sec_none
, "none" },
182 { Opt_sec_none
, "null" },
183 { Opt_sec_sys
, "sys" },
185 { Opt_sec_krb5
, "krb5" },
186 { Opt_sec_krb5i
, "krb5i" },
187 { Opt_sec_krb5p
, "krb5p" },
189 { Opt_sec_lkey
, "lkey" },
190 { Opt_sec_lkeyi
, "lkeyi" },
191 { Opt_sec_lkeyp
, "lkeyp" },
193 { Opt_sec_spkm
, "spkm3" },
194 { Opt_sec_spkmi
, "spkm3i" },
195 { Opt_sec_spkmp
, "spkm3p" },
197 { Opt_sec_err
, NULL
}
201 static void nfs_umount_begin(struct vfsmount
*, int);
202 static int nfs_statfs(struct dentry
*, struct kstatfs
*);
203 static int nfs_show_options(struct seq_file
*, struct vfsmount
*);
204 static int nfs_show_stats(struct seq_file
*, struct vfsmount
*);
205 static int nfs_get_sb(struct file_system_type
*, int, const char *, void *, struct vfsmount
*);
206 static int nfs_xdev_get_sb(struct file_system_type
*fs_type
,
207 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
);
208 static void nfs_kill_super(struct super_block
*);
209 static void nfs_put_super(struct super_block
*);
211 static struct file_system_type nfs_fs_type
= {
212 .owner
= THIS_MODULE
,
214 .get_sb
= nfs_get_sb
,
215 .kill_sb
= nfs_kill_super
,
216 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
219 struct file_system_type nfs_xdev_fs_type
= {
220 .owner
= THIS_MODULE
,
222 .get_sb
= nfs_xdev_get_sb
,
223 .kill_sb
= nfs_kill_super
,
224 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
227 static const struct super_operations nfs_sops
= {
228 .alloc_inode
= nfs_alloc_inode
,
229 .destroy_inode
= nfs_destroy_inode
,
230 .write_inode
= nfs_write_inode
,
231 .put_super
= nfs_put_super
,
232 .statfs
= nfs_statfs
,
233 .clear_inode
= nfs_clear_inode
,
234 .umount_begin
= nfs_umount_begin
,
235 .show_options
= nfs_show_options
,
236 .show_stats
= nfs_show_stats
,
240 static int nfs4_get_sb(struct file_system_type
*fs_type
,
241 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
);
242 static int nfs4_xdev_get_sb(struct file_system_type
*fs_type
,
243 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
);
244 static int nfs4_referral_get_sb(struct file_system_type
*fs_type
,
245 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
);
246 static void nfs4_kill_super(struct super_block
*sb
);
248 static struct file_system_type nfs4_fs_type
= {
249 .owner
= THIS_MODULE
,
251 .get_sb
= nfs4_get_sb
,
252 .kill_sb
= nfs4_kill_super
,
253 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
256 struct file_system_type nfs4_xdev_fs_type
= {
257 .owner
= THIS_MODULE
,
259 .get_sb
= nfs4_xdev_get_sb
,
260 .kill_sb
= nfs4_kill_super
,
261 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
264 struct file_system_type nfs4_referral_fs_type
= {
265 .owner
= THIS_MODULE
,
267 .get_sb
= nfs4_referral_get_sb
,
268 .kill_sb
= nfs4_kill_super
,
269 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_REVAL_DOT
|FS_BINARY_MOUNTDATA
,
272 static const struct super_operations nfs4_sops
= {
273 .alloc_inode
= nfs_alloc_inode
,
274 .destroy_inode
= nfs_destroy_inode
,
275 .write_inode
= nfs_write_inode
,
276 .statfs
= nfs_statfs
,
277 .clear_inode
= nfs4_clear_inode
,
278 .umount_begin
= nfs_umount_begin
,
279 .show_options
= nfs_show_options
,
280 .show_stats
= nfs_show_stats
,
284 static struct shrinker acl_shrinker
= {
285 .shrink
= nfs_access_cache_shrinker
,
286 .seeks
= DEFAULT_SEEKS
,
290 * Register the NFS filesystems
292 int __init
register_nfs_fs(void)
296 ret
= register_filesystem(&nfs_fs_type
);
300 ret
= nfs_register_sysctl();
304 ret
= register_filesystem(&nfs4_fs_type
);
308 register_shrinker(&acl_shrinker
);
313 nfs_unregister_sysctl();
316 unregister_filesystem(&nfs_fs_type
);
322 * Unregister the NFS filesystems
324 void __exit
unregister_nfs_fs(void)
326 unregister_shrinker(&acl_shrinker
);
328 unregister_filesystem(&nfs4_fs_type
);
330 nfs_unregister_sysctl();
331 unregister_filesystem(&nfs_fs_type
);
334 void nfs_sb_active(struct nfs_server
*server
)
336 atomic_inc(&server
->active
);
339 void nfs_sb_deactive(struct nfs_server
*server
)
341 if (atomic_dec_and_test(&server
->active
))
342 wake_up(&server
->active_wq
);
345 static void nfs_put_super(struct super_block
*sb
)
347 struct nfs_server
*server
= NFS_SB(sb
);
349 * Make sure there are no outstanding ops to this server.
350 * If so, wait for them to finish before allowing the
351 * unmount to continue.
353 wait_event(server
->active_wq
, atomic_read(&server
->active
) == 0);
357 * Deliver file system statistics to userspace
359 static int nfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
361 struct nfs_server
*server
= NFS_SB(dentry
->d_sb
);
362 unsigned char blockbits
;
363 unsigned long blockres
;
364 struct nfs_fh
*fh
= NFS_FH(dentry
->d_inode
);
365 struct nfs_fattr fattr
;
366 struct nfs_fsstat res
= {
373 error
= server
->nfs_client
->rpc_ops
->statfs(server
, fh
, &res
);
376 buf
->f_type
= NFS_SUPER_MAGIC
;
379 * Current versions of glibc do not correctly handle the
380 * case where f_frsize != f_bsize. Eventually we want to
381 * report the value of wtmult in this field.
383 buf
->f_frsize
= dentry
->d_sb
->s_blocksize
;
386 * On most *nix systems, f_blocks, f_bfree, and f_bavail
387 * are reported in units of f_frsize. Linux hasn't had
388 * an f_frsize field in its statfs struct until recently,
389 * thus historically Linux's sys_statfs reports these
390 * fields in units of f_bsize.
392 buf
->f_bsize
= dentry
->d_sb
->s_blocksize
;
393 blockbits
= dentry
->d_sb
->s_blocksize_bits
;
394 blockres
= (1 << blockbits
) - 1;
395 buf
->f_blocks
= (res
.tbytes
+ blockres
) >> blockbits
;
396 buf
->f_bfree
= (res
.fbytes
+ blockres
) >> blockbits
;
397 buf
->f_bavail
= (res
.abytes
+ blockres
) >> blockbits
;
399 buf
->f_files
= res
.tfiles
;
400 buf
->f_ffree
= res
.afiles
;
402 buf
->f_namelen
= server
->namelen
;
408 dprintk("%s: statfs error = %d\n", __FUNCTION__
, -error
);
414 * Map the security flavour number to a name
416 static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour
)
418 static const struct {
419 rpc_authflavor_t flavour
;
422 { RPC_AUTH_NULL
, "null" },
423 { RPC_AUTH_UNIX
, "sys" },
424 { RPC_AUTH_GSS_KRB5
, "krb5" },
425 { RPC_AUTH_GSS_KRB5I
, "krb5i" },
426 { RPC_AUTH_GSS_KRB5P
, "krb5p" },
427 { RPC_AUTH_GSS_LKEY
, "lkey" },
428 { RPC_AUTH_GSS_LKEYI
, "lkeyi" },
429 { RPC_AUTH_GSS_LKEYP
, "lkeyp" },
430 { RPC_AUTH_GSS_SPKM
, "spkm" },
431 { RPC_AUTH_GSS_SPKMI
, "spkmi" },
432 { RPC_AUTH_GSS_SPKMP
, "spkmp" },
433 { UINT_MAX
, "unknown" }
437 for (i
= 0; sec_flavours
[i
].flavour
!= UINT_MAX
; i
++) {
438 if (sec_flavours
[i
].flavour
== flavour
)
441 return sec_flavours
[i
].str
;
445 * Describe the mount options in force on this server representation
447 static void nfs_show_mount_options(struct seq_file
*m
, struct nfs_server
*nfss
, int showdefaults
)
449 static const struct proc_nfs_info
{
454 { NFS_MOUNT_SOFT
, ",soft", ",hard" },
455 { NFS_MOUNT_NOCTO
, ",nocto", "" },
456 { NFS_MOUNT_NOAC
, ",noac", "" },
457 { NFS_MOUNT_NONLM
, ",nolock", "" },
458 { NFS_MOUNT_NOACL
, ",noacl", "" },
459 { NFS_MOUNT_NORDIRPLUS
, ",nordirplus", "" },
460 { NFS_MOUNT_UNSHARED
, ",nosharecache", ""},
463 const struct proc_nfs_info
*nfs_infop
;
464 struct nfs_client
*clp
= nfss
->nfs_client
;
466 seq_printf(m
, ",vers=%d", clp
->rpc_ops
->version
);
467 seq_printf(m
, ",rsize=%d", nfss
->rsize
);
468 seq_printf(m
, ",wsize=%d", nfss
->wsize
);
469 if (nfss
->acregmin
!= 3*HZ
|| showdefaults
)
470 seq_printf(m
, ",acregmin=%d", nfss
->acregmin
/HZ
);
471 if (nfss
->acregmax
!= 60*HZ
|| showdefaults
)
472 seq_printf(m
, ",acregmax=%d", nfss
->acregmax
/HZ
);
473 if (nfss
->acdirmin
!= 30*HZ
|| showdefaults
)
474 seq_printf(m
, ",acdirmin=%d", nfss
->acdirmin
/HZ
);
475 if (nfss
->acdirmax
!= 60*HZ
|| showdefaults
)
476 seq_printf(m
, ",acdirmax=%d", nfss
->acdirmax
/HZ
);
477 for (nfs_infop
= nfs_info
; nfs_infop
->flag
; nfs_infop
++) {
478 if (nfss
->flags
& nfs_infop
->flag
)
479 seq_puts(m
, nfs_infop
->str
);
481 seq_puts(m
, nfs_infop
->nostr
);
483 seq_printf(m
, ",proto=%s",
484 rpc_peeraddr2str(nfss
->client
, RPC_DISPLAY_PROTO
));
485 seq_printf(m
, ",timeo=%lu", 10U * nfss
->client
->cl_timeout
->to_initval
/ HZ
);
486 seq_printf(m
, ",retrans=%u", nfss
->client
->cl_timeout
->to_retries
);
487 seq_printf(m
, ",sec=%s", nfs_pseudoflavour_to_name(nfss
->client
->cl_auth
->au_flavor
));
491 * Describe the mount options on this VFS mountpoint
493 static int nfs_show_options(struct seq_file
*m
, struct vfsmount
*mnt
)
495 struct nfs_server
*nfss
= NFS_SB(mnt
->mnt_sb
);
497 nfs_show_mount_options(m
, nfss
, 0);
499 seq_printf(m
, ",addr=%s",
500 rpc_peeraddr2str(nfss
->nfs_client
->cl_rpcclient
,
507 * Present statistical information for this VFS mountpoint
509 static int nfs_show_stats(struct seq_file
*m
, struct vfsmount
*mnt
)
512 struct nfs_server
*nfss
= NFS_SB(mnt
->mnt_sb
);
513 struct rpc_auth
*auth
= nfss
->client
->cl_auth
;
514 struct nfs_iostats totals
= { };
516 seq_printf(m
, "statvers=%s", NFS_IOSTAT_VERS
);
519 * Display all mount option settings
521 seq_printf(m
, "\n\topts:\t");
522 seq_puts(m
, mnt
->mnt_sb
->s_flags
& MS_RDONLY
? "ro" : "rw");
523 seq_puts(m
, mnt
->mnt_sb
->s_flags
& MS_SYNCHRONOUS
? ",sync" : "");
524 seq_puts(m
, mnt
->mnt_sb
->s_flags
& MS_NOATIME
? ",noatime" : "");
525 seq_puts(m
, mnt
->mnt_sb
->s_flags
& MS_NODIRATIME
? ",nodiratime" : "");
526 nfs_show_mount_options(m
, nfss
, 1);
528 seq_printf(m
, "\n\tage:\t%lu", (jiffies
- nfss
->mount_time
) / HZ
);
530 seq_printf(m
, "\n\tcaps:\t");
531 seq_printf(m
, "caps=0x%x", nfss
->caps
);
532 seq_printf(m
, ",wtmult=%d", nfss
->wtmult
);
533 seq_printf(m
, ",dtsize=%d", nfss
->dtsize
);
534 seq_printf(m
, ",bsize=%d", nfss
->bsize
);
535 seq_printf(m
, ",namelen=%d", nfss
->namelen
);
538 if (nfss
->nfs_client
->rpc_ops
->version
== 4) {
539 seq_printf(m
, "\n\tnfsv4:\t");
540 seq_printf(m
, "bm0=0x%x", nfss
->attr_bitmask
[0]);
541 seq_printf(m
, ",bm1=0x%x", nfss
->attr_bitmask
[1]);
542 seq_printf(m
, ",acl=0x%x", nfss
->acl_bitmask
);
547 * Display security flavor in effect for this mount
549 seq_printf(m
, "\n\tsec:\tflavor=%d", auth
->au_ops
->au_flavor
);
551 seq_printf(m
, ",pseudoflavor=%d", auth
->au_flavor
);
554 * Display superblock I/O counters
556 for_each_possible_cpu(cpu
) {
557 struct nfs_iostats
*stats
;
560 stats
= per_cpu_ptr(nfss
->io_stats
, cpu
);
562 for (i
= 0; i
< __NFSIOS_COUNTSMAX
; i
++)
563 totals
.events
[i
] += stats
->events
[i
];
564 for (i
= 0; i
< __NFSIOS_BYTESMAX
; i
++)
565 totals
.bytes
[i
] += stats
->bytes
[i
];
570 seq_printf(m
, "\n\tevents:\t");
571 for (i
= 0; i
< __NFSIOS_COUNTSMAX
; i
++)
572 seq_printf(m
, "%lu ", totals
.events
[i
]);
573 seq_printf(m
, "\n\tbytes:\t");
574 for (i
= 0; i
< __NFSIOS_BYTESMAX
; i
++)
575 seq_printf(m
, "%Lu ", totals
.bytes
[i
]);
578 rpc_print_iostats(m
, nfss
->client
);
584 * Begin unmount by attempting to remove all automounted mountpoints we added
585 * in response to xdev traversals and referrals
587 static void nfs_umount_begin(struct vfsmount
*vfsmnt
, int flags
)
589 struct nfs_server
*server
= NFS_SB(vfsmnt
->mnt_sb
);
590 struct rpc_clnt
*rpc
;
592 shrink_submounts(vfsmnt
, &nfs_automount_list
);
594 if (!(flags
& MNT_FORCE
))
596 /* -EIO all pending I/O */
597 rpc
= server
->client_acl
;
599 rpc_killall_tasks(rpc
);
600 rpc
= server
->client
;
602 rpc_killall_tasks(rpc
);
606 * Set the port number in an address. Be agnostic about the address family.
608 static void nfs_set_port(struct sockaddr
*sap
, unsigned short port
)
610 switch (sap
->sa_family
) {
612 struct sockaddr_in
*ap
= (struct sockaddr_in
*)sap
;
613 ap
->sin_port
= htons(port
);
617 struct sockaddr_in6
*ap
= (struct sockaddr_in6
*)sap
;
618 ap
->sin6_port
= htons(port
);
625 * Sanity-check a server address provided by the mount command.
627 * Address family must be initialized, and address must not be
628 * the ANY address for that family.
630 static int nfs_verify_server_address(struct sockaddr
*addr
)
632 switch (addr
->sa_family
) {
634 struct sockaddr_in
*sa
= (struct sockaddr_in
*)addr
;
635 return sa
->sin_addr
.s_addr
!= INADDR_ANY
;
638 struct in6_addr
*sa
= &((struct sockaddr_in6
*)addr
)->sin6_addr
;
639 return !ipv6_addr_any(sa
);
647 * Parse string addresses passed in via a mount option,
648 * and construct a sockaddr based on the result.
650 * If address parsing fails, set the sockaddr's address
651 * family to AF_UNSPEC to force nfs_verify_server_address()
654 static void nfs_parse_server_address(char *value
,
655 struct sockaddr
*sap
,
658 if (strchr(value
, ':')) {
659 struct sockaddr_in6
*ap
= (struct sockaddr_in6
*)sap
;
660 u8
*addr
= (u8
*)&ap
->sin6_addr
.in6_u
;
662 ap
->sin6_family
= AF_INET6
;
664 if (in6_pton(value
, -1, addr
, '\0', NULL
))
667 struct sockaddr_in
*ap
= (struct sockaddr_in
*)sap
;
668 u8
*addr
= (u8
*)&ap
->sin_addr
.s_addr
;
670 ap
->sin_family
= AF_INET
;
672 if (in4_pton(value
, -1, addr
, '\0', NULL
))
676 sap
->sa_family
= AF_UNSPEC
;
681 * Error-check and convert a string of mount options from user space into
684 static int nfs_parse_mount_options(char *raw
,
685 struct nfs_parsed_mount_data
*mnt
)
688 unsigned short port
= 0;
691 dfprintk(MOUNT
, "NFS: mount options string was NULL.\n");
694 dfprintk(MOUNT
, "NFS: nfs mount opts='%s'\n", raw
);
696 while ((p
= strsep(&raw
, ",")) != NULL
) {
697 substring_t args
[MAX_OPT_ARGS
];
703 dfprintk(MOUNT
, "NFS: parsing nfs mount option '%s'\n", p
);
705 token
= match_token(p
, nfs_mount_option_tokens
, args
);
708 mnt
->flags
|= NFS_MOUNT_SOFT
;
711 mnt
->flags
&= ~NFS_MOUNT_SOFT
;
717 mnt
->flags
|= NFS_MOUNT_POSIX
;
720 mnt
->flags
&= ~NFS_MOUNT_POSIX
;
723 mnt
->flags
&= ~NFS_MOUNT_NOCTO
;
726 mnt
->flags
|= NFS_MOUNT_NOCTO
;
729 mnt
->flags
&= ~NFS_MOUNT_NOAC
;
732 mnt
->flags
|= NFS_MOUNT_NOAC
;
735 mnt
->flags
&= ~NFS_MOUNT_NONLM
;
738 mnt
->flags
|= NFS_MOUNT_NONLM
;
741 mnt
->flags
&= ~NFS_MOUNT_VER3
;
744 mnt
->flags
|= NFS_MOUNT_VER3
;
747 mnt
->flags
&= ~NFS_MOUNT_TCP
;
748 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_UDP
;
753 mnt
->flags
|= NFS_MOUNT_TCP
;
754 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
759 mnt
->flags
|= NFS_MOUNT_TCP
; /* for side protocols */
760 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_RDMA
;
765 mnt
->flags
&= ~NFS_MOUNT_NOACL
;
768 mnt
->flags
|= NFS_MOUNT_NOACL
;
771 mnt
->flags
&= ~NFS_MOUNT_NORDIRPLUS
;
774 mnt
->flags
|= NFS_MOUNT_NORDIRPLUS
;
777 mnt
->flags
&= ~NFS_MOUNT_UNSHARED
;
779 case Opt_nosharecache
:
780 mnt
->flags
|= NFS_MOUNT_UNSHARED
;
784 if (match_int(args
, &option
))
786 if (option
< 0 || option
> 65535)
791 if (match_int(args
, &mnt
->rsize
))
795 if (match_int(args
, &mnt
->wsize
))
799 if (match_int(args
, &option
))
806 if (match_int(args
, &mnt
->timeo
))
810 if (match_int(args
, &mnt
->retrans
))
814 if (match_int(args
, &mnt
->acregmin
))
818 if (match_int(args
, &mnt
->acregmax
))
822 if (match_int(args
, &mnt
->acdirmin
))
826 if (match_int(args
, &mnt
->acdirmax
))
830 if (match_int(args
, &option
))
837 mnt
->acdirmax
= option
;
840 if (match_int(args
, &mnt
->namlen
))
844 if (match_int(args
, &option
))
846 if (option
< 0 || option
> 65535)
848 mnt
->mount_server
.port
= option
;
851 if (match_int(args
, &option
))
855 mnt
->mount_server
.version
= option
;
858 if (match_int(args
, &option
))
862 mnt
->flags
&= ~NFS_MOUNT_VER3
;
865 mnt
->flags
|= NFS_MOUNT_VER3
;
873 string
= match_strdup(args
);
876 token
= match_token(string
, nfs_secflavor_tokens
, args
);
880 * The flags setting is for v2/v3. The flavor_len
881 * setting is for v4. v2/v3 also need to know the
882 * difference between NULL and UNIX.
886 mnt
->flags
&= ~NFS_MOUNT_SECFLAVOUR
;
887 mnt
->auth_flavor_len
= 0;
888 mnt
->auth_flavors
[0] = RPC_AUTH_NULL
;
891 mnt
->flags
&= ~NFS_MOUNT_SECFLAVOUR
;
892 mnt
->auth_flavor_len
= 0;
893 mnt
->auth_flavors
[0] = RPC_AUTH_UNIX
;
896 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
897 mnt
->auth_flavor_len
= 1;
898 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_KRB5
;
901 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
902 mnt
->auth_flavor_len
= 1;
903 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_KRB5I
;
906 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
907 mnt
->auth_flavor_len
= 1;
908 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_KRB5P
;
911 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
912 mnt
->auth_flavor_len
= 1;
913 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_LKEY
;
916 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
917 mnt
->auth_flavor_len
= 1;
918 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_LKEYI
;
921 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
922 mnt
->auth_flavor_len
= 1;
923 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_LKEYP
;
926 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
927 mnt
->auth_flavor_len
= 1;
928 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_SPKM
;
931 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
932 mnt
->auth_flavor_len
= 1;
933 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_SPKMI
;
936 mnt
->flags
|= NFS_MOUNT_SECFLAVOUR
;
937 mnt
->auth_flavor_len
= 1;
938 mnt
->auth_flavors
[0] = RPC_AUTH_GSS_SPKMP
;
945 string
= match_strdup(args
);
948 token
= match_token(string
,
949 nfs_xprt_protocol_tokens
, args
);
954 mnt
->flags
&= ~NFS_MOUNT_TCP
;
955 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_UDP
;
960 mnt
->flags
|= NFS_MOUNT_TCP
;
961 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
966 /* vector side protocols to TCP */
967 mnt
->flags
|= NFS_MOUNT_TCP
;
968 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_RDMA
;
977 string
= match_strdup(args
);
980 token
= match_token(string
,
981 nfs_xprt_protocol_tokens
, args
);
986 mnt
->mount_server
.protocol
= XPRT_TRANSPORT_UDP
;
989 mnt
->mount_server
.protocol
= XPRT_TRANSPORT_TCP
;
991 case Opt_xprt_rdma
: /* not used for side protocols */
997 string
= match_strdup(args
);
1000 nfs_parse_server_address(string
, (struct sockaddr
*)
1001 &mnt
->nfs_server
.address
,
1002 &mnt
->nfs_server
.addrlen
);
1005 case Opt_clientaddr
:
1006 string
= match_strdup(args
);
1009 kfree(mnt
->client_address
);
1010 mnt
->client_address
= string
;
1013 string
= match_strdup(args
);
1016 kfree(mnt
->mount_server
.hostname
);
1017 mnt
->mount_server
.hostname
= string
;
1020 string
= match_strdup(args
);
1023 nfs_parse_server_address(string
, (struct sockaddr
*)
1024 &mnt
->mount_server
.address
,
1025 &mnt
->mount_server
.addrlen
);
1030 case Opt_deprecated
:
1038 nfs_set_port((struct sockaddr
*)&mnt
->nfs_server
.address
, port
);
1043 printk(KERN_INFO
"NFS: not enough memory to parse option\n");
1047 printk(KERN_INFO
"NFS: unrecognized NFS version number\n");
1051 printk(KERN_INFO
"NFS: unrecognized transport protocol\n");
1055 printk(KERN_INFO
"NFS: unrecognized security flavor\n");
1059 printk(KERN_INFO
"NFS: unknown mount option: %s\n", p
);
1064 * Use the remote server's MOUNT service to request the NFS file handle
1065 * corresponding to the provided path.
1067 static int nfs_try_mount(struct nfs_parsed_mount_data
*args
,
1068 struct nfs_fh
*root_fh
)
1070 struct sockaddr
*sap
= (struct sockaddr
*)&args
->mount_server
.address
;
1074 if (args
->mount_server
.version
== 0) {
1075 if (args
->flags
& NFS_MOUNT_VER3
)
1076 args
->mount_server
.version
= NFS_MNT3_VERSION
;
1078 args
->mount_server
.version
= NFS_MNT_VERSION
;
1081 if (args
->mount_server
.hostname
)
1082 hostname
= args
->mount_server
.hostname
;
1084 hostname
= args
->nfs_server
.hostname
;
1087 * Construct the mount server's address.
1089 if (args
->mount_server
.address
.ss_family
== AF_UNSPEC
) {
1090 memcpy(sap
, &args
->nfs_server
.address
,
1091 args
->nfs_server
.addrlen
);
1092 args
->mount_server
.addrlen
= args
->nfs_server
.addrlen
;
1096 * autobind will be used if mount_server.port == 0
1098 nfs_set_port(sap
, args
->mount_server
.port
);
1101 * Now ask the mount server to map our export path
1104 status
= nfs_mount(sap
,
1105 args
->mount_server
.addrlen
,
1107 args
->nfs_server
.export_path
,
1108 args
->mount_server
.version
,
1109 args
->mount_server
.protocol
,
1114 dfprintk(MOUNT
, "NFS: unable to mount server %s, error %d",
1120 * Validate the NFS2/NFS3 mount data
1121 * - fills in the mount root filehandle
1123 * For option strings, user space handles the following behaviors:
1125 * + DNS: mapping server host name to IP address ("addr=" option)
1127 * + failure mode: how to behave if a mount request can't be handled
1128 * immediately ("fg/bg" option)
1130 * + retry: how often to retry a mount request ("retry=" option)
1132 * + breaking back: trying proto=udp after proto=tcp, v2 after v3,
1133 * mountproto=tcp after mountproto=udp, and so on
1135 static int nfs_validate_mount_data(void *options
,
1136 struct nfs_parsed_mount_data
*args
,
1137 struct nfs_fh
*mntfh
,
1138 const char *dev_name
)
1140 struct nfs_mount_data
*data
= (struct nfs_mount_data
*)options
;
1142 memset(args
, 0, sizeof(*args
));
1147 args
->flags
= (NFS_MOUNT_VER3
| NFS_MOUNT_TCP
);
1148 args
->rsize
= NFS_MAX_FILE_IO_SIZE
;
1149 args
->wsize
= NFS_MAX_FILE_IO_SIZE
;
1153 args
->acregmax
= 60;
1154 args
->acdirmin
= 30;
1155 args
->acdirmax
= 60;
1156 args
->mount_server
.protocol
= XPRT_TRANSPORT_UDP
;
1157 args
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
1159 switch (data
->version
) {
1165 if (data
->flags
& NFS_MOUNT_VER3
)
1167 data
->root
.size
= NFS2_FHSIZE
;
1168 memcpy(data
->root
.data
, data
->old_root
.data
, NFS2_FHSIZE
);
1170 if (data
->flags
& NFS_MOUNT_SECFLAVOUR
)
1173 memset(data
->context
, 0, sizeof(data
->context
));
1175 if (data
->flags
& NFS_MOUNT_VER3
)
1176 mntfh
->size
= data
->root
.size
;
1178 mntfh
->size
= NFS2_FHSIZE
;
1180 if (mntfh
->size
> sizeof(mntfh
->data
))
1181 goto out_invalid_fh
;
1183 memcpy(mntfh
->data
, data
->root
.data
, mntfh
->size
);
1184 if (mntfh
->size
< sizeof(mntfh
->data
))
1185 memset(mntfh
->data
+ mntfh
->size
, 0,
1186 sizeof(mntfh
->data
) - mntfh
->size
);
1189 * Translate to nfs_parsed_mount_data, which nfs_fill_super
1192 args
->flags
= data
->flags
;
1193 args
->rsize
= data
->rsize
;
1194 args
->wsize
= data
->wsize
;
1195 args
->flags
= data
->flags
;
1196 args
->timeo
= data
->timeo
;
1197 args
->retrans
= data
->retrans
;
1198 args
->acregmin
= data
->acregmin
;
1199 args
->acregmax
= data
->acregmax
;
1200 args
->acdirmin
= data
->acdirmin
;
1201 args
->acdirmax
= data
->acdirmax
;
1203 memcpy(&args
->nfs_server
.address
, &data
->addr
,
1204 sizeof(data
->addr
));
1205 args
->nfs_server
.addrlen
= sizeof(data
->addr
);
1206 if (!nfs_verify_server_address((struct sockaddr
*)
1207 &args
->nfs_server
.address
))
1208 goto out_no_address
;
1210 if (!(data
->flags
& NFS_MOUNT_TCP
))
1211 args
->nfs_server
.protocol
= XPRT_TRANSPORT_UDP
;
1212 /* N.B. caller will free nfs_server.hostname in all cases */
1213 args
->nfs_server
.hostname
= kstrdup(data
->hostname
, GFP_KERNEL
);
1214 args
->namlen
= data
->namlen
;
1215 args
->bsize
= data
->bsize
;
1216 args
->auth_flavors
[0] = data
->pseudoflavor
;
1223 if (nfs_parse_mount_options((char *)options
, args
) == 0)
1226 if (!nfs_verify_server_address((struct sockaddr
*)
1227 &args
->nfs_server
.address
))
1228 goto out_no_address
;
1230 c
= strchr(dev_name
, ':');
1234 /* N.B. caller will free nfs_server.hostname in all cases */
1235 args
->nfs_server
.hostname
= kstrndup(dev_name
, len
, GFP_KERNEL
);
1238 if (strlen(c
) > NFS_MAXPATHLEN
)
1239 return -ENAMETOOLONG
;
1240 args
->nfs_server
.export_path
= c
;
1242 status
= nfs_try_mount(args
, mntfh
);
1250 if (!(args
->flags
& NFS_MOUNT_SECFLAVOUR
))
1251 args
->auth_flavors
[0] = RPC_AUTH_UNIX
;
1253 #ifndef CONFIG_NFS_V3
1254 if (args
->flags
& NFS_MOUNT_VER3
)
1255 goto out_v3_not_compiled
;
1256 #endif /* !CONFIG_NFS_V3 */
1261 dfprintk(MOUNT
, "NFS: mount program didn't pass any mount data\n");
1265 dfprintk(MOUNT
, "NFS: nfs_mount_data version %d does not support v3\n",
1270 dfprintk(MOUNT
, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
1273 #ifndef CONFIG_NFS_V3
1274 out_v3_not_compiled
:
1275 dfprintk(MOUNT
, "NFS: NFSv3 is not compiled into kernel\n");
1276 return -EPROTONOSUPPORT
;
1277 #endif /* !CONFIG_NFS_V3 */
1280 dfprintk(MOUNT
, "NFS: mount program didn't pass remote address\n");
1284 dfprintk(MOUNT
, "NFS: invalid root filehandle\n");
1289 * Initialise the common bits of the superblock
1291 static inline void nfs_initialise_sb(struct super_block
*sb
)
1293 struct nfs_server
*server
= NFS_SB(sb
);
1295 sb
->s_magic
= NFS_SUPER_MAGIC
;
1297 /* We probably want something more informative here */
1298 snprintf(sb
->s_id
, sizeof(sb
->s_id
),
1299 "%x:%x", MAJOR(sb
->s_dev
), MINOR(sb
->s_dev
));
1301 if (sb
->s_blocksize
== 0)
1302 sb
->s_blocksize
= nfs_block_bits(server
->wsize
,
1303 &sb
->s_blocksize_bits
);
1305 if (server
->flags
& NFS_MOUNT_NOAC
)
1306 sb
->s_flags
|= MS_SYNCHRONOUS
;
1308 nfs_super_set_maxbytes(sb
, server
->maxfilesize
);
1312 * Finish setting up an NFS2/3 superblock
1314 static void nfs_fill_super(struct super_block
*sb
,
1315 struct nfs_parsed_mount_data
*data
)
1317 struct nfs_server
*server
= NFS_SB(sb
);
1319 sb
->s_blocksize_bits
= 0;
1320 sb
->s_blocksize
= 0;
1322 sb
->s_blocksize
= nfs_block_size(data
->bsize
, &sb
->s_blocksize_bits
);
1324 if (server
->flags
& NFS_MOUNT_VER3
) {
1325 /* The VFS shouldn't apply the umask to mode bits. We will do
1326 * so ourselves when necessary.
1328 sb
->s_flags
|= MS_POSIXACL
;
1329 sb
->s_time_gran
= 1;
1332 sb
->s_op
= &nfs_sops
;
1333 nfs_initialise_sb(sb
);
1337 * Finish setting up a cloned NFS2/3 superblock
1339 static void nfs_clone_super(struct super_block
*sb
,
1340 const struct super_block
*old_sb
)
1342 struct nfs_server
*server
= NFS_SB(sb
);
1344 sb
->s_blocksize_bits
= old_sb
->s_blocksize_bits
;
1345 sb
->s_blocksize
= old_sb
->s_blocksize
;
1346 sb
->s_maxbytes
= old_sb
->s_maxbytes
;
1348 if (server
->flags
& NFS_MOUNT_VER3
) {
1349 /* The VFS shouldn't apply the umask to mode bits. We will do
1350 * so ourselves when necessary.
1352 sb
->s_flags
|= MS_POSIXACL
;
1353 sb
->s_time_gran
= 1;
1356 sb
->s_op
= old_sb
->s_op
;
1357 nfs_initialise_sb(sb
);
1360 #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
1362 static int nfs_compare_mount_options(const struct super_block
*s
, const struct nfs_server
*b
, int flags
)
1364 const struct nfs_server
*a
= s
->s_fs_info
;
1365 const struct rpc_clnt
*clnt_a
= a
->client
;
1366 const struct rpc_clnt
*clnt_b
= b
->client
;
1368 if ((s
->s_flags
& NFS_MS_MASK
) != (flags
& NFS_MS_MASK
))
1370 if (a
->nfs_client
!= b
->nfs_client
)
1372 if (a
->flags
!= b
->flags
)
1374 if (a
->wsize
!= b
->wsize
)
1376 if (a
->rsize
!= b
->rsize
)
1378 if (a
->acregmin
!= b
->acregmin
)
1380 if (a
->acregmax
!= b
->acregmax
)
1382 if (a
->acdirmin
!= b
->acdirmin
)
1384 if (a
->acdirmax
!= b
->acdirmax
)
1386 if (clnt_a
->cl_auth
->au_flavor
!= clnt_b
->cl_auth
->au_flavor
)
1393 struct nfs_sb_mountdata
{
1394 struct nfs_server
*server
;
1398 static int nfs_set_super(struct super_block
*s
, void *data
)
1400 struct nfs_sb_mountdata
*sb_mntdata
= data
;
1401 struct nfs_server
*server
= sb_mntdata
->server
;
1404 s
->s_flags
= sb_mntdata
->mntflags
;
1405 s
->s_fs_info
= server
;
1406 ret
= set_anon_super(s
, server
);
1408 server
->s_dev
= s
->s_dev
;
1412 static int nfs_compare_super_address(struct nfs_server
*server1
,
1413 struct nfs_server
*server2
)
1415 struct sockaddr
*sap1
, *sap2
;
1417 sap1
= (struct sockaddr
*)&server1
->nfs_client
->cl_addr
;
1418 sap2
= (struct sockaddr
*)&server2
->nfs_client
->cl_addr
;
1420 if (sap1
->sa_family
!= sap2
->sa_family
)
1423 switch (sap1
->sa_family
) {
1425 struct sockaddr_in
*sin1
= (struct sockaddr_in
*)sap1
;
1426 struct sockaddr_in
*sin2
= (struct sockaddr_in
*)sap2
;
1427 if (sin1
->sin_addr
.s_addr
!= sin2
->sin_addr
.s_addr
)
1429 if (sin1
->sin_port
!= sin2
->sin_port
)
1434 struct sockaddr_in6
*sin1
= (struct sockaddr_in6
*)sap1
;
1435 struct sockaddr_in6
*sin2
= (struct sockaddr_in6
*)sap2
;
1436 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
1438 if (sin1
->sin6_port
!= sin2
->sin6_port
)
1449 static int nfs_compare_super(struct super_block
*sb
, void *data
)
1451 struct nfs_sb_mountdata
*sb_mntdata
= data
;
1452 struct nfs_server
*server
= sb_mntdata
->server
, *old
= NFS_SB(sb
);
1453 int mntflags
= sb_mntdata
->mntflags
;
1455 if (!nfs_compare_super_address(old
, server
))
1457 /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */
1458 if (old
->flags
& NFS_MOUNT_UNSHARED
)
1460 if (memcmp(&old
->fsid
, &server
->fsid
, sizeof(old
->fsid
)) != 0)
1462 return nfs_compare_mount_options(sb
, server
, mntflags
);
1465 static int nfs_get_sb(struct file_system_type
*fs_type
,
1466 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
)
1468 struct nfs_server
*server
= NULL
;
1469 struct super_block
*s
;
1470 struct nfs_fh mntfh
;
1471 struct nfs_parsed_mount_data data
;
1472 struct dentry
*mntroot
;
1473 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
1474 struct nfs_sb_mountdata sb_mntdata
= {
1479 /* Validate the mount data */
1480 error
= nfs_validate_mount_data(raw_data
, &data
, &mntfh
, dev_name
);
1484 /* Get a volume representation */
1485 server
= nfs_create_server(&data
, &mntfh
);
1486 if (IS_ERR(server
)) {
1487 error
= PTR_ERR(server
);
1490 sb_mntdata
.server
= server
;
1492 if (server
->flags
& NFS_MOUNT_UNSHARED
)
1493 compare_super
= NULL
;
1495 /* Get a superblock - note that we may end up sharing one that already exists */
1496 s
= sget(fs_type
, compare_super
, nfs_set_super
, &sb_mntdata
);
1502 if (s
->s_fs_info
!= server
) {
1503 nfs_free_server(server
);
1508 /* initial superblock/root creation */
1509 nfs_fill_super(s
, &data
);
1512 mntroot
= nfs_get_root(s
, &mntfh
);
1513 if (IS_ERR(mntroot
)) {
1514 error
= PTR_ERR(mntroot
);
1515 goto error_splat_super
;
1518 s
->s_flags
|= MS_ACTIVE
;
1520 mnt
->mnt_root
= mntroot
;
1524 kfree(data
.nfs_server
.hostname
);
1525 kfree(data
.mount_server
.hostname
);
1529 nfs_free_server(server
);
1533 up_write(&s
->s_umount
);
1534 deactivate_super(s
);
1539 * Destroy an NFS2/3 superblock
1541 static void nfs_kill_super(struct super_block
*s
)
1543 struct nfs_server
*server
= NFS_SB(s
);
1546 nfs_free_server(server
);
1550 * Clone an NFS2/3 server record on xdev traversal (FSID-change)
1552 static int nfs_xdev_get_sb(struct file_system_type
*fs_type
, int flags
,
1553 const char *dev_name
, void *raw_data
,
1554 struct vfsmount
*mnt
)
1556 struct nfs_clone_mount
*data
= raw_data
;
1557 struct super_block
*s
;
1558 struct nfs_server
*server
;
1559 struct dentry
*mntroot
;
1560 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
1561 struct nfs_sb_mountdata sb_mntdata
= {
1566 dprintk("--> nfs_xdev_get_sb()\n");
1568 /* create a new volume representation */
1569 server
= nfs_clone_server(NFS_SB(data
->sb
), data
->fh
, data
->fattr
);
1570 if (IS_ERR(server
)) {
1571 error
= PTR_ERR(server
);
1572 goto out_err_noserver
;
1574 sb_mntdata
.server
= server
;
1576 if (server
->flags
& NFS_MOUNT_UNSHARED
)
1577 compare_super
= NULL
;
1579 /* Get a superblock - note that we may end up sharing one that already exists */
1580 s
= sget(&nfs_fs_type
, compare_super
, nfs_set_super
, &sb_mntdata
);
1586 if (s
->s_fs_info
!= server
) {
1587 nfs_free_server(server
);
1592 /* initial superblock/root creation */
1593 nfs_clone_super(s
, data
->sb
);
1596 mntroot
= nfs_get_root(s
, data
->fh
);
1597 if (IS_ERR(mntroot
)) {
1598 error
= PTR_ERR(mntroot
);
1599 goto error_splat_super
;
1601 if (mntroot
->d_inode
->i_op
!= NFS_SB(s
)->nfs_client
->rpc_ops
->dir_inode_ops
) {
1604 goto error_splat_super
;
1607 s
->s_flags
|= MS_ACTIVE
;
1609 mnt
->mnt_root
= mntroot
;
1611 dprintk("<-- nfs_xdev_get_sb() = 0\n");
1615 nfs_free_server(server
);
1617 dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error
);
1621 up_write(&s
->s_umount
);
1622 deactivate_super(s
);
1623 dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error
);
1627 #ifdef CONFIG_NFS_V4
1630 * Finish setting up a cloned NFS4 superblock
1632 static void nfs4_clone_super(struct super_block
*sb
,
1633 const struct super_block
*old_sb
)
1635 sb
->s_blocksize_bits
= old_sb
->s_blocksize_bits
;
1636 sb
->s_blocksize
= old_sb
->s_blocksize
;
1637 sb
->s_maxbytes
= old_sb
->s_maxbytes
;
1638 sb
->s_time_gran
= 1;
1639 sb
->s_op
= old_sb
->s_op
;
1640 nfs_initialise_sb(sb
);
1644 * Set up an NFS4 superblock
1646 static void nfs4_fill_super(struct super_block
*sb
)
1648 sb
->s_time_gran
= 1;
1649 sb
->s_op
= &nfs4_sops
;
1650 nfs_initialise_sb(sb
);
1654 * If the user didn't specify a port, set the port number to
1655 * the NFS version 4 default port.
1657 static void nfs4_default_port(struct sockaddr
*sap
)
1659 switch (sap
->sa_family
) {
1661 struct sockaddr_in
*ap
= (struct sockaddr_in
*)sap
;
1662 if (ap
->sin_port
== 0)
1663 ap
->sin_port
= htons(NFS_PORT
);
1667 struct sockaddr_in6
*ap
= (struct sockaddr_in6
*)sap
;
1668 if (ap
->sin6_port
== 0)
1669 ap
->sin6_port
= htons(NFS_PORT
);
1676 * Validate NFSv4 mount options
1678 static int nfs4_validate_mount_data(void *options
,
1679 struct nfs_parsed_mount_data
*args
,
1680 const char *dev_name
)
1682 struct sockaddr_in
*ap
;
1683 struct nfs4_mount_data
*data
= (struct nfs4_mount_data
*)options
;
1686 memset(args
, 0, sizeof(*args
));
1691 args
->rsize
= NFS_MAX_FILE_IO_SIZE
;
1692 args
->wsize
= NFS_MAX_FILE_IO_SIZE
;
1696 args
->acregmax
= 60;
1697 args
->acdirmin
= 30;
1698 args
->acdirmax
= 60;
1699 args
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
1701 switch (data
->version
) {
1703 ap
= (struct sockaddr_in
*)&args
->nfs_server
.address
;
1704 if (data
->host_addrlen
> sizeof(args
->nfs_server
.address
))
1705 goto out_no_address
;
1706 if (data
->host_addrlen
== 0)
1707 goto out_no_address
;
1708 args
->nfs_server
.addrlen
= data
->host_addrlen
;
1709 if (copy_from_user(ap
, data
->host_addr
, data
->host_addrlen
))
1711 if (!nfs_verify_server_address((struct sockaddr
*)
1712 &args
->nfs_server
.address
))
1713 goto out_no_address
;
1715 nfs4_default_port((struct sockaddr
*)
1716 &args
->nfs_server
.address
);
1718 switch (data
->auth_flavourlen
) {
1720 args
->auth_flavors
[0] = RPC_AUTH_UNIX
;
1723 if (copy_from_user(&args
->auth_flavors
[0],
1724 data
->auth_flavours
,
1725 sizeof(args
->auth_flavors
[0])))
1729 goto out_inval_auth
;
1732 c
= strndup_user(data
->hostname
.data
, NFS4_MAXNAMLEN
);
1735 args
->nfs_server
.hostname
= c
;
1737 c
= strndup_user(data
->mnt_path
.data
, NFS4_MAXPATHLEN
);
1740 args
->nfs_server
.export_path
= c
;
1741 dfprintk(MOUNT
, "NFS: MNTPATH: '%s'\n", c
);
1743 c
= strndup_user(data
->client_addr
.data
, 16);
1746 args
->client_address
= c
;
1749 * Translate to nfs_parsed_mount_data, which nfs4_fill_super
1753 args
->flags
= data
->flags
& NFS4_MOUNT_FLAGMASK
;
1754 args
->rsize
= data
->rsize
;
1755 args
->wsize
= data
->wsize
;
1756 args
->timeo
= data
->timeo
;
1757 args
->retrans
= data
->retrans
;
1758 args
->acregmin
= data
->acregmin
;
1759 args
->acregmax
= data
->acregmax
;
1760 args
->acdirmin
= data
->acdirmin
;
1761 args
->acdirmax
= data
->acdirmax
;
1762 args
->nfs_server
.protocol
= data
->proto
;
1768 if (nfs_parse_mount_options((char *)options
, args
) == 0)
1771 if (!nfs_verify_server_address((struct sockaddr
*)
1772 &args
->nfs_server
.address
))
1775 nfs4_default_port((struct sockaddr
*)
1776 &args
->nfs_server
.address
);
1778 switch (args
->auth_flavor_len
) {
1780 args
->auth_flavors
[0] = RPC_AUTH_UNIX
;
1785 goto out_inval_auth
;
1789 * Split "dev_name" into "hostname:mntpath".
1791 c
= strchr(dev_name
, ':');
1794 /* while calculating len, pretend ':' is '\0' */
1796 if (len
> NFS4_MAXNAMLEN
)
1797 return -ENAMETOOLONG
;
1798 /* N.B. caller will free nfs_server.hostname in all cases */
1799 args
->nfs_server
.hostname
= kstrndup(dev_name
, len
, GFP_KERNEL
);
1801 c
++; /* step over the ':' */
1803 if (len
> NFS4_MAXPATHLEN
)
1804 return -ENAMETOOLONG
;
1805 args
->nfs_server
.export_path
= kstrndup(c
, len
, GFP_KERNEL
);
1807 dprintk("NFS: MNTPATH: '%s'\n", args
->nfs_server
.export_path
);
1809 if (args
->client_address
== NULL
)
1810 goto out_no_client_address
;
1819 dfprintk(MOUNT
, "NFS4: mount program didn't pass any mount data\n");
1823 dfprintk(MOUNT
, "NFS4: Invalid number of RPC auth flavours %d\n",
1824 data
->auth_flavourlen
);
1828 dfprintk(MOUNT
, "NFS4: mount program didn't pass remote address\n");
1831 out_no_client_address
:
1832 dfprintk(MOUNT
, "NFS4: mount program didn't pass callback address\n");
1837 * Get the superblock for an NFS4 mountpoint
1839 static int nfs4_get_sb(struct file_system_type
*fs_type
,
1840 int flags
, const char *dev_name
, void *raw_data
, struct vfsmount
*mnt
)
1842 struct nfs_parsed_mount_data data
;
1843 struct super_block
*s
;
1844 struct nfs_server
*server
;
1845 struct nfs_fh mntfh
;
1846 struct dentry
*mntroot
;
1847 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
1848 struct nfs_sb_mountdata sb_mntdata
= {
1853 /* Validate the mount data */
1854 error
= nfs4_validate_mount_data(raw_data
, &data
, dev_name
);
1858 /* Get a volume representation */
1859 server
= nfs4_create_server(&data
, &mntfh
);
1860 if (IS_ERR(server
)) {
1861 error
= PTR_ERR(server
);
1864 sb_mntdata
.server
= server
;
1866 if (server
->flags
& NFS4_MOUNT_UNSHARED
)
1867 compare_super
= NULL
;
1869 /* Get a superblock - note that we may end up sharing one that already exists */
1870 s
= sget(fs_type
, compare_super
, nfs_set_super
, &sb_mntdata
);
1876 if (s
->s_fs_info
!= server
) {
1877 nfs_free_server(server
);
1882 /* initial superblock/root creation */
1886 mntroot
= nfs4_get_root(s
, &mntfh
);
1887 if (IS_ERR(mntroot
)) {
1888 error
= PTR_ERR(mntroot
);
1889 goto error_splat_super
;
1892 s
->s_flags
|= MS_ACTIVE
;
1894 mnt
->mnt_root
= mntroot
;
1898 kfree(data
.client_address
);
1899 kfree(data
.nfs_server
.export_path
);
1900 kfree(data
.nfs_server
.hostname
);
1904 nfs_free_server(server
);
1908 up_write(&s
->s_umount
);
1909 deactivate_super(s
);
1913 static void nfs4_kill_super(struct super_block
*sb
)
1915 struct nfs_server
*server
= NFS_SB(sb
);
1917 nfs_return_all_delegations(sb
);
1918 kill_anon_super(sb
);
1920 nfs4_renewd_prepare_shutdown(server
);
1921 nfs_free_server(server
);
1925 * Clone an NFS4 server record on xdev traversal (FSID-change)
1927 static int nfs4_xdev_get_sb(struct file_system_type
*fs_type
, int flags
,
1928 const char *dev_name
, void *raw_data
,
1929 struct vfsmount
*mnt
)
1931 struct nfs_clone_mount
*data
= raw_data
;
1932 struct super_block
*s
;
1933 struct nfs_server
*server
;
1934 struct dentry
*mntroot
;
1935 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
1936 struct nfs_sb_mountdata sb_mntdata
= {
1941 dprintk("--> nfs4_xdev_get_sb()\n");
1943 /* create a new volume representation */
1944 server
= nfs_clone_server(NFS_SB(data
->sb
), data
->fh
, data
->fattr
);
1945 if (IS_ERR(server
)) {
1946 error
= PTR_ERR(server
);
1947 goto out_err_noserver
;
1949 sb_mntdata
.server
= server
;
1951 if (server
->flags
& NFS4_MOUNT_UNSHARED
)
1952 compare_super
= NULL
;
1954 /* Get a superblock - note that we may end up sharing one that already exists */
1955 s
= sget(&nfs_fs_type
, compare_super
, nfs_set_super
, &sb_mntdata
);
1961 if (s
->s_fs_info
!= server
) {
1962 nfs_free_server(server
);
1967 /* initial superblock/root creation */
1968 nfs4_clone_super(s
, data
->sb
);
1971 mntroot
= nfs4_get_root(s
, data
->fh
);
1972 if (IS_ERR(mntroot
)) {
1973 error
= PTR_ERR(mntroot
);
1974 goto error_splat_super
;
1976 if (mntroot
->d_inode
->i_op
!= NFS_SB(s
)->nfs_client
->rpc_ops
->dir_inode_ops
) {
1979 goto error_splat_super
;
1982 s
->s_flags
|= MS_ACTIVE
;
1984 mnt
->mnt_root
= mntroot
;
1986 dprintk("<-- nfs4_xdev_get_sb() = 0\n");
1990 nfs_free_server(server
);
1992 dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error
);
1996 up_write(&s
->s_umount
);
1997 deactivate_super(s
);
1998 dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error
);
2003 * Create an NFS4 server record on referral traversal
2005 static int nfs4_referral_get_sb(struct file_system_type
*fs_type
, int flags
,
2006 const char *dev_name
, void *raw_data
,
2007 struct vfsmount
*mnt
)
2009 struct nfs_clone_mount
*data
= raw_data
;
2010 struct super_block
*s
;
2011 struct nfs_server
*server
;
2012 struct dentry
*mntroot
;
2013 struct nfs_fh mntfh
;
2014 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
2015 struct nfs_sb_mountdata sb_mntdata
= {
2020 dprintk("--> nfs4_referral_get_sb()\n");
2022 /* create a new volume representation */
2023 server
= nfs4_create_referral_server(data
, &mntfh
);
2024 if (IS_ERR(server
)) {
2025 error
= PTR_ERR(server
);
2026 goto out_err_noserver
;
2028 sb_mntdata
.server
= server
;
2030 if (server
->flags
& NFS4_MOUNT_UNSHARED
)
2031 compare_super
= NULL
;
2033 /* Get a superblock - note that we may end up sharing one that already exists */
2034 s
= sget(&nfs_fs_type
, compare_super
, nfs_set_super
, &sb_mntdata
);
2040 if (s
->s_fs_info
!= server
) {
2041 nfs_free_server(server
);
2046 /* initial superblock/root creation */
2050 mntroot
= nfs4_get_root(s
, &mntfh
);
2051 if (IS_ERR(mntroot
)) {
2052 error
= PTR_ERR(mntroot
);
2053 goto error_splat_super
;
2055 if (mntroot
->d_inode
->i_op
!= NFS_SB(s
)->nfs_client
->rpc_ops
->dir_inode_ops
) {
2058 goto error_splat_super
;
2061 s
->s_flags
|= MS_ACTIVE
;
2063 mnt
->mnt_root
= mntroot
;
2065 dprintk("<-- nfs4_referral_get_sb() = 0\n");
2069 nfs_free_server(server
);
2071 dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error
);
2075 up_write(&s
->s_umount
);
2076 deactivate_super(s
);
2077 dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error
);
2081 #endif /* CONFIG_NFS_V4 */