1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 1992 Rick Sladkey
7 * nfs superblock handling functions
9 * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
10 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
12 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
13 * J.S.Peatfield@damtp.cam.ac.uk
15 * Split from inode.c by David Howells <dhowells@redhat.com>
17 * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a
18 * particular server are held in the same superblock
19 * - NFS superblocks can have several effective roots to the dentry tree
20 * - directory type roots are spliced into the tree when a path from one root reaches the root
21 * of another (see nfs_lookup())
24 #include <linux/module.h>
25 #include <linux/init.h>
27 #include <linux/time.h>
28 #include <linux/kernel.h>
30 #include <linux/string.h>
31 #include <linux/stat.h>
32 #include <linux/errno.h>
33 #include <linux/unistd.h>
34 #include <linux/sunrpc/clnt.h>
35 #include <linux/sunrpc/addr.h>
36 #include <linux/sunrpc/stats.h>
37 #include <linux/sunrpc/metrics.h>
38 #include <linux/sunrpc/xprtsock.h>
39 #include <linux/sunrpc/xprtrdma.h>
40 #include <linux/nfs_fs.h>
41 #include <linux/nfs_mount.h>
42 #include <linux/nfs4_mount.h>
43 #include <linux/lockd/bind.h>
44 #include <linux/seq_file.h>
45 #include <linux/mount.h>
46 #include <linux/namei.h>
47 #include <linux/vfs.h>
48 #include <linux/inet.h>
49 #include <linux/in6.h>
50 #include <linux/slab.h>
52 #include <linux/netdevice.h>
53 #include <linux/nfs_xdr.h>
54 #include <linux/magic.h>
55 #include <linux/parser.h>
56 #include <linux/nsproxy.h>
57 #include <linux/rcupdate.h>
59 #include <linux/uaccess.h>
63 #include "delegation.h"
67 #include "nfs4session.h"
71 #define NFSDBG_FACILITY NFSDBG_VFS
72 #define NFS_TEXT_DATA 1
74 #if IS_ENABLED(CONFIG_NFS_V3)
75 #define NFS_DEFAULT_VERSION 3
77 #define NFS_DEFAULT_VERSION 2
80 #define NFS_MAX_CONNECTIONS 16
83 /* Mount options that take no arguments */
84 Opt_soft
, Opt_softerr
, Opt_hard
,
85 Opt_posix
, Opt_noposix
,
89 Opt_udp
, Opt_tcp
, Opt_rdma
,
91 Opt_rdirplus
, Opt_nordirplus
,
92 Opt_sharecache
, Opt_nosharecache
,
93 Opt_resvport
, Opt_noresvport
,
94 Opt_fscache
, Opt_nofscache
,
95 Opt_migration
, Opt_nomigration
,
97 /* Mount options that take integer arguments */
99 Opt_rsize
, Opt_wsize
, Opt_bsize
,
100 Opt_timeo
, Opt_retrans
,
101 Opt_acregmin
, Opt_acregmax
,
102 Opt_acdirmin
, Opt_acdirmax
,
109 /* Mount options that take string arguments */
111 Opt_sec
, Opt_proto
, Opt_mountproto
, Opt_mounthost
,
112 Opt_addr
, Opt_mountaddr
, Opt_clientaddr
,
118 /* Special mount options */
119 Opt_userspace
, Opt_deprecated
, Opt_sloppy
,
124 static const match_table_t nfs_mount_option_tokens
= {
125 { Opt_userspace
, "bg" },
126 { Opt_userspace
, "fg" },
127 { Opt_userspace
, "retry=%s" },
129 { Opt_sloppy
, "sloppy" },
131 { Opt_soft
, "soft" },
132 { Opt_softerr
, "softerr" },
133 { Opt_hard
, "hard" },
134 { Opt_deprecated
, "intr" },
135 { Opt_deprecated
, "nointr" },
136 { Opt_posix
, "posix" },
137 { Opt_noposix
, "noposix" },
139 { Opt_nocto
, "nocto" },
141 { Opt_noac
, "noac" },
142 { Opt_lock
, "lock" },
143 { Opt_nolock
, "nolock" },
146 { Opt_rdma
, "rdma" },
148 { Opt_noacl
, "noacl" },
149 { Opt_rdirplus
, "rdirplus" },
150 { Opt_nordirplus
, "nordirplus" },
151 { Opt_sharecache
, "sharecache" },
152 { Opt_nosharecache
, "nosharecache" },
153 { Opt_resvport
, "resvport" },
154 { Opt_noresvport
, "noresvport" },
155 { Opt_fscache
, "fsc" },
156 { Opt_nofscache
, "nofsc" },
157 { Opt_migration
, "migration" },
158 { Opt_nomigration
, "nomigration" },
160 { Opt_port
, "port=%s" },
161 { Opt_rsize
, "rsize=%s" },
162 { Opt_wsize
, "wsize=%s" },
163 { Opt_bsize
, "bsize=%s" },
164 { Opt_timeo
, "timeo=%s" },
165 { Opt_retrans
, "retrans=%s" },
166 { Opt_acregmin
, "acregmin=%s" },
167 { Opt_acregmax
, "acregmax=%s" },
168 { Opt_acdirmin
, "acdirmin=%s" },
169 { Opt_acdirmax
, "acdirmax=%s" },
170 { Opt_actimeo
, "actimeo=%s" },
171 { Opt_namelen
, "namlen=%s" },
172 { Opt_mountport
, "mountport=%s" },
173 { Opt_mountvers
, "mountvers=%s" },
174 { Opt_minorversion
, "minorversion=%s" },
176 { Opt_nfsvers
, "nfsvers=%s" },
177 { Opt_nfsvers
, "vers=%s" },
179 { Opt_sec
, "sec=%s" },
180 { Opt_proto
, "proto=%s" },
181 { Opt_mountproto
, "mountproto=%s" },
182 { Opt_addr
, "addr=%s" },
183 { Opt_clientaddr
, "clientaddr=%s" },
184 { Opt_mounthost
, "mounthost=%s" },
185 { Opt_mountaddr
, "mountaddr=%s" },
187 { Opt_nconnect
, "nconnect=%s" },
189 { Opt_lookupcache
, "lookupcache=%s" },
190 { Opt_fscache_uniq
, "fsc=%s" },
191 { Opt_local_lock
, "local_lock=%s" },
193 /* The following needs to be listed after all other options */
194 { Opt_nfsvers
, "v%s" },
200 Opt_xprt_udp
, Opt_xprt_udp6
, Opt_xprt_tcp
, Opt_xprt_tcp6
, Opt_xprt_rdma
,
206 static const match_table_t nfs_xprt_protocol_tokens
= {
207 { Opt_xprt_udp
, "udp" },
208 { Opt_xprt_udp6
, "udp6" },
209 { Opt_xprt_tcp
, "tcp" },
210 { Opt_xprt_tcp6
, "tcp6" },
211 { Opt_xprt_rdma
, "rdma" },
212 { Opt_xprt_rdma6
, "rdma6" },
214 { Opt_xprt_err
, NULL
}
218 Opt_sec_none
, Opt_sec_sys
,
219 Opt_sec_krb5
, Opt_sec_krb5i
, Opt_sec_krb5p
,
220 Opt_sec_lkey
, Opt_sec_lkeyi
, Opt_sec_lkeyp
,
221 Opt_sec_spkm
, Opt_sec_spkmi
, Opt_sec_spkmp
,
226 static const match_table_t nfs_secflavor_tokens
= {
227 { Opt_sec_none
, "none" },
228 { Opt_sec_none
, "null" },
229 { Opt_sec_sys
, "sys" },
231 { Opt_sec_krb5
, "krb5" },
232 { Opt_sec_krb5i
, "krb5i" },
233 { Opt_sec_krb5p
, "krb5p" },
235 { Opt_sec_lkey
, "lkey" },
236 { Opt_sec_lkeyi
, "lkeyi" },
237 { Opt_sec_lkeyp
, "lkeyp" },
239 { Opt_sec_spkm
, "spkm3" },
240 { Opt_sec_spkmi
, "spkm3i" },
241 { Opt_sec_spkmp
, "spkm3p" },
243 { Opt_sec_err
, NULL
}
247 Opt_lookupcache_all
, Opt_lookupcache_positive
,
248 Opt_lookupcache_none
,
253 static match_table_t nfs_lookupcache_tokens
= {
254 { Opt_lookupcache_all
, "all" },
255 { Opt_lookupcache_positive
, "pos" },
256 { Opt_lookupcache_positive
, "positive" },
257 { Opt_lookupcache_none
, "none" },
259 { Opt_lookupcache_err
, NULL
}
263 Opt_local_lock_all
, Opt_local_lock_flock
, Opt_local_lock_posix
,
269 static match_table_t nfs_local_lock_tokens
= {
270 { Opt_local_lock_all
, "all" },
271 { Opt_local_lock_flock
, "flock" },
272 { Opt_local_lock_posix
, "posix" },
273 { Opt_local_lock_none
, "none" },
275 { Opt_local_lock_err
, NULL
}
279 Opt_vers_2
, Opt_vers_3
, Opt_vers_4
, Opt_vers_4_0
,
280 Opt_vers_4_1
, Opt_vers_4_2
,
285 static match_table_t nfs_vers_tokens
= {
289 { Opt_vers_4_0
, "4.0" },
290 { Opt_vers_4_1
, "4.1" },
291 { Opt_vers_4_2
, "4.2" },
293 { Opt_vers_err
, NULL
}
296 static struct dentry
*nfs_xdev_mount(struct file_system_type
*fs_type
,
297 int flags
, const char *dev_name
, void *raw_data
);
299 struct file_system_type nfs_fs_type
= {
300 .owner
= THIS_MODULE
,
302 .mount
= nfs_fs_mount
,
303 .kill_sb
= nfs_kill_super
,
304 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_BINARY_MOUNTDATA
,
306 MODULE_ALIAS_FS("nfs");
307 EXPORT_SYMBOL_GPL(nfs_fs_type
);
309 struct file_system_type nfs_xdev_fs_type
= {
310 .owner
= THIS_MODULE
,
312 .mount
= nfs_xdev_mount
,
313 .kill_sb
= nfs_kill_super
,
314 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_BINARY_MOUNTDATA
,
317 const struct super_operations nfs_sops
= {
318 .alloc_inode
= nfs_alloc_inode
,
319 .free_inode
= nfs_free_inode
,
320 .write_inode
= nfs_write_inode
,
321 .drop_inode
= nfs_drop_inode
,
322 .statfs
= nfs_statfs
,
323 .evict_inode
= nfs_evict_inode
,
324 .umount_begin
= nfs_umount_begin
,
325 .show_options
= nfs_show_options
,
326 .show_devname
= nfs_show_devname
,
327 .show_path
= nfs_show_path
,
328 .show_stats
= nfs_show_stats
,
329 .remount_fs
= nfs_remount
,
331 EXPORT_SYMBOL_GPL(nfs_sops
);
333 #if IS_ENABLED(CONFIG_NFS_V4)
334 static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data
*);
335 static int nfs4_validate_mount_data(void *options
,
336 struct nfs_parsed_mount_data
*args
, const char *dev_name
);
338 struct file_system_type nfs4_fs_type
= {
339 .owner
= THIS_MODULE
,
341 .mount
= nfs_fs_mount
,
342 .kill_sb
= nfs_kill_super
,
343 .fs_flags
= FS_RENAME_DOES_D_MOVE
|FS_BINARY_MOUNTDATA
,
345 MODULE_ALIAS_FS("nfs4");
346 MODULE_ALIAS("nfs4");
347 EXPORT_SYMBOL_GPL(nfs4_fs_type
);
349 static int __init
register_nfs4_fs(void)
351 return register_filesystem(&nfs4_fs_type
);
354 static void unregister_nfs4_fs(void)
356 unregister_filesystem(&nfs4_fs_type
);
359 static int __init
register_nfs4_fs(void)
364 static void unregister_nfs4_fs(void)
369 static struct shrinker acl_shrinker
= {
370 .count_objects
= nfs_access_cache_count
,
371 .scan_objects
= nfs_access_cache_scan
,
372 .seeks
= DEFAULT_SEEKS
,
376 * Register the NFS filesystems
378 int __init
register_nfs_fs(void)
382 ret
= register_filesystem(&nfs_fs_type
);
386 ret
= register_nfs4_fs();
390 ret
= nfs_register_sysctl();
393 ret
= register_shrinker(&acl_shrinker
);
398 nfs_unregister_sysctl();
400 unregister_nfs4_fs();
402 unregister_filesystem(&nfs_fs_type
);
408 * Unregister the NFS filesystems
410 void __exit
unregister_nfs_fs(void)
412 unregister_shrinker(&acl_shrinker
);
413 nfs_unregister_sysctl();
414 unregister_nfs4_fs();
415 unregister_filesystem(&nfs_fs_type
);
418 bool nfs_sb_active(struct super_block
*sb
)
420 struct nfs_server
*server
= NFS_SB(sb
);
422 if (!atomic_inc_not_zero(&sb
->s_active
))
424 if (atomic_inc_return(&server
->active
) != 1)
425 atomic_dec(&sb
->s_active
);
428 EXPORT_SYMBOL_GPL(nfs_sb_active
);
430 void nfs_sb_deactive(struct super_block
*sb
)
432 struct nfs_server
*server
= NFS_SB(sb
);
434 if (atomic_dec_and_test(&server
->active
))
435 deactivate_super(sb
);
437 EXPORT_SYMBOL_GPL(nfs_sb_deactive
);
440 * Deliver file system statistics to userspace
442 int nfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
444 struct nfs_server
*server
= NFS_SB(dentry
->d_sb
);
445 unsigned char blockbits
;
446 unsigned long blockres
;
447 struct nfs_fh
*fh
= NFS_FH(d_inode(dentry
));
448 struct nfs_fsstat res
;
451 res
.fattr
= nfs_alloc_fattr();
452 if (res
.fattr
== NULL
)
455 error
= server
->nfs_client
->rpc_ops
->statfs(server
, fh
, &res
);
456 if (unlikely(error
== -ESTALE
)) {
457 struct dentry
*pd_dentry
;
459 pd_dentry
= dget_parent(dentry
);
460 nfs_zap_caches(d_inode(pd_dentry
));
463 nfs_free_fattr(res
.fattr
);
467 buf
->f_type
= NFS_SUPER_MAGIC
;
470 * Current versions of glibc do not correctly handle the
471 * case where f_frsize != f_bsize. Eventually we want to
472 * report the value of wtmult in this field.
474 buf
->f_frsize
= dentry
->d_sb
->s_blocksize
;
477 * On most *nix systems, f_blocks, f_bfree, and f_bavail
478 * are reported in units of f_frsize. Linux hasn't had
479 * an f_frsize field in its statfs struct until recently,
480 * thus historically Linux's sys_statfs reports these
481 * fields in units of f_bsize.
483 buf
->f_bsize
= dentry
->d_sb
->s_blocksize
;
484 blockbits
= dentry
->d_sb
->s_blocksize_bits
;
485 blockres
= (1 << blockbits
) - 1;
486 buf
->f_blocks
= (res
.tbytes
+ blockres
) >> blockbits
;
487 buf
->f_bfree
= (res
.fbytes
+ blockres
) >> blockbits
;
488 buf
->f_bavail
= (res
.abytes
+ blockres
) >> blockbits
;
490 buf
->f_files
= res
.tfiles
;
491 buf
->f_ffree
= res
.afiles
;
493 buf
->f_namelen
= server
->namelen
;
498 dprintk("%s: statfs error = %d\n", __func__
, -error
);
501 EXPORT_SYMBOL_GPL(nfs_statfs
);
504 * Map the security flavour number to a name
506 static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour
)
508 static const struct {
509 rpc_authflavor_t flavour
;
511 } sec_flavours
[NFS_AUTH_INFO_MAX_FLAVORS
] = {
512 /* update NFS_AUTH_INFO_MAX_FLAVORS when this list changes! */
513 { RPC_AUTH_NULL
, "null" },
514 { RPC_AUTH_UNIX
, "sys" },
515 { RPC_AUTH_GSS_KRB5
, "krb5" },
516 { RPC_AUTH_GSS_KRB5I
, "krb5i" },
517 { RPC_AUTH_GSS_KRB5P
, "krb5p" },
518 { RPC_AUTH_GSS_LKEY
, "lkey" },
519 { RPC_AUTH_GSS_LKEYI
, "lkeyi" },
520 { RPC_AUTH_GSS_LKEYP
, "lkeyp" },
521 { RPC_AUTH_GSS_SPKM
, "spkm" },
522 { RPC_AUTH_GSS_SPKMI
, "spkmi" },
523 { RPC_AUTH_GSS_SPKMP
, "spkmp" },
524 { UINT_MAX
, "unknown" }
528 for (i
= 0; sec_flavours
[i
].flavour
!= UINT_MAX
; i
++) {
529 if (sec_flavours
[i
].flavour
== flavour
)
532 return sec_flavours
[i
].str
;
535 static void nfs_show_mountd_netid(struct seq_file
*m
, struct nfs_server
*nfss
,
538 struct sockaddr
*sap
= (struct sockaddr
*) &nfss
->mountd_address
;
541 switch (sap
->sa_family
) {
543 switch (nfss
->mountd_protocol
) {
545 proto
= RPCBIND_NETID_UDP
;
548 proto
= RPCBIND_NETID_TCP
;
553 switch (nfss
->mountd_protocol
) {
555 proto
= RPCBIND_NETID_UDP6
;
558 proto
= RPCBIND_NETID_TCP6
;
563 if (proto
|| showdefaults
)
564 seq_printf(m
, ",mountproto=%s", proto
?: "auto");
567 static void nfs_show_mountd_options(struct seq_file
*m
, struct nfs_server
*nfss
,
570 struct sockaddr
*sap
= (struct sockaddr
*)&nfss
->mountd_address
;
572 if (nfss
->flags
& NFS_MOUNT_LEGACY_INTERFACE
)
575 switch (sap
->sa_family
) {
577 struct sockaddr_in
*sin
= (struct sockaddr_in
*)sap
;
578 seq_printf(m
, ",mountaddr=%pI4", &sin
->sin_addr
.s_addr
);
582 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*)sap
;
583 seq_printf(m
, ",mountaddr=%pI6c", &sin6
->sin6_addr
);
588 seq_puts(m
, ",mountaddr=unspecified");
591 if (nfss
->mountd_version
|| showdefaults
)
592 seq_printf(m
, ",mountvers=%u", nfss
->mountd_version
);
593 if ((nfss
->mountd_port
&&
594 nfss
->mountd_port
!= (unsigned short)NFS_UNSPEC_PORT
) ||
596 seq_printf(m
, ",mountport=%u", nfss
->mountd_port
);
598 nfs_show_mountd_netid(m
, nfss
, showdefaults
);
601 #if IS_ENABLED(CONFIG_NFS_V4)
602 static void nfs_show_nfsv4_options(struct seq_file
*m
, struct nfs_server
*nfss
,
605 struct nfs_client
*clp
= nfss
->nfs_client
;
607 seq_printf(m
, ",clientaddr=%s", clp
->cl_ipaddr
);
610 static void nfs_show_nfsv4_options(struct seq_file
*m
, struct nfs_server
*nfss
,
616 static void nfs_show_nfs_version(struct seq_file
*m
,
617 unsigned int version
,
618 unsigned int minorversion
)
620 seq_printf(m
, ",vers=%u", version
);
622 seq_printf(m
, ".%u", minorversion
);
626 * Describe the mount options in force on this server representation
628 static void nfs_show_mount_options(struct seq_file
*m
, struct nfs_server
*nfss
,
631 static const struct proc_nfs_info
{
636 { NFS_MOUNT_SOFT
, ",soft", "" },
637 { NFS_MOUNT_SOFTERR
, ",softerr", "" },
638 { NFS_MOUNT_POSIX
, ",posix", "" },
639 { NFS_MOUNT_NOCTO
, ",nocto", "" },
640 { NFS_MOUNT_NOAC
, ",noac", "" },
641 { NFS_MOUNT_NONLM
, ",nolock", "" },
642 { NFS_MOUNT_NOACL
, ",noacl", "" },
643 { NFS_MOUNT_NORDIRPLUS
, ",nordirplus", "" },
644 { NFS_MOUNT_UNSHARED
, ",nosharecache", "" },
645 { NFS_MOUNT_NORESVPORT
, ",noresvport", "" },
648 const struct proc_nfs_info
*nfs_infop
;
649 struct nfs_client
*clp
= nfss
->nfs_client
;
650 u32 version
= clp
->rpc_ops
->version
;
651 int local_flock
, local_fcntl
;
653 nfs_show_nfs_version(m
, version
, clp
->cl_minorversion
);
654 seq_printf(m
, ",rsize=%u", nfss
->rsize
);
655 seq_printf(m
, ",wsize=%u", nfss
->wsize
);
656 if (nfss
->bsize
!= 0)
657 seq_printf(m
, ",bsize=%u", nfss
->bsize
);
658 seq_printf(m
, ",namlen=%u", nfss
->namelen
);
659 if (nfss
->acregmin
!= NFS_DEF_ACREGMIN
*HZ
|| showdefaults
)
660 seq_printf(m
, ",acregmin=%u", nfss
->acregmin
/HZ
);
661 if (nfss
->acregmax
!= NFS_DEF_ACREGMAX
*HZ
|| showdefaults
)
662 seq_printf(m
, ",acregmax=%u", nfss
->acregmax
/HZ
);
663 if (nfss
->acdirmin
!= NFS_DEF_ACDIRMIN
*HZ
|| showdefaults
)
664 seq_printf(m
, ",acdirmin=%u", nfss
->acdirmin
/HZ
);
665 if (nfss
->acdirmax
!= NFS_DEF_ACDIRMAX
*HZ
|| showdefaults
)
666 seq_printf(m
, ",acdirmax=%u", nfss
->acdirmax
/HZ
);
667 if (!(nfss
->flags
& (NFS_MOUNT_SOFT
|NFS_MOUNT_SOFTERR
)))
668 seq_puts(m
, ",hard");
669 for (nfs_infop
= nfs_info
; nfs_infop
->flag
; nfs_infop
++) {
670 if (nfss
->flags
& nfs_infop
->flag
)
671 seq_puts(m
, nfs_infop
->str
);
673 seq_puts(m
, nfs_infop
->nostr
);
676 seq_printf(m
, ",proto=%s",
677 rpc_peeraddr2str(nfss
->client
, RPC_DISPLAY_NETID
));
679 if (clp
->cl_nconnect
> 0)
680 seq_printf(m
, ",nconnect=%u", clp
->cl_nconnect
);
682 if (nfss
->port
!= NFS_PORT
)
683 seq_printf(m
, ",port=%u", nfss
->port
);
686 seq_printf(m
, ",port=%u", nfss
->port
);
688 seq_printf(m
, ",timeo=%lu", 10U * nfss
->client
->cl_timeout
->to_initval
/ HZ
);
689 seq_printf(m
, ",retrans=%u", nfss
->client
->cl_timeout
->to_retries
);
690 seq_printf(m
, ",sec=%s", nfs_pseudoflavour_to_name(nfss
->client
->cl_auth
->au_flavor
));
693 nfs_show_mountd_options(m
, nfss
, showdefaults
);
695 nfs_show_nfsv4_options(m
, nfss
, showdefaults
);
697 if (nfss
->options
& NFS_OPTION_FSCACHE
)
700 if (nfss
->options
& NFS_OPTION_MIGRATION
)
701 seq_puts(m
, ",migration");
703 if (nfss
->flags
& NFS_MOUNT_LOOKUP_CACHE_NONEG
) {
704 if (nfss
->flags
& NFS_MOUNT_LOOKUP_CACHE_NONE
)
705 seq_puts(m
, ",lookupcache=none");
707 seq_puts(m
, ",lookupcache=pos");
710 local_flock
= nfss
->flags
& NFS_MOUNT_LOCAL_FLOCK
;
711 local_fcntl
= nfss
->flags
& NFS_MOUNT_LOCAL_FCNTL
;
713 if (!local_flock
&& !local_fcntl
)
714 seq_puts(m
, ",local_lock=none");
715 else if (local_flock
&& local_fcntl
)
716 seq_puts(m
, ",local_lock=all");
717 else if (local_flock
)
718 seq_puts(m
, ",local_lock=flock");
720 seq_puts(m
, ",local_lock=posix");
724 * Describe the mount options on this VFS mountpoint
726 int nfs_show_options(struct seq_file
*m
, struct dentry
*root
)
728 struct nfs_server
*nfss
= NFS_SB(root
->d_sb
);
730 nfs_show_mount_options(m
, nfss
, 0);
733 seq_printf(m
, ",addr=%s",
734 rpc_peeraddr2str(nfss
->nfs_client
->cl_rpcclient
,
740 EXPORT_SYMBOL_GPL(nfs_show_options
);
742 #if IS_ENABLED(CONFIG_NFS_V4)
743 static void show_lease(struct seq_file
*m
, struct nfs_server
*server
)
745 struct nfs_client
*clp
= server
->nfs_client
;
746 unsigned long expire
;
748 seq_printf(m
, ",lease_time=%ld", clp
->cl_lease_time
/ HZ
);
749 expire
= clp
->cl_last_renewal
+ clp
->cl_lease_time
;
750 seq_printf(m
, ",lease_expired=%ld",
751 time_after(expire
, jiffies
) ? 0 : (jiffies
- expire
) / HZ
);
753 #ifdef CONFIG_NFS_V4_1
754 static void show_sessions(struct seq_file
*m
, struct nfs_server
*server
)
756 if (nfs4_has_session(server
->nfs_client
))
757 seq_puts(m
, ",sessions");
760 static void show_sessions(struct seq_file
*m
, struct nfs_server
*server
) {}
764 #ifdef CONFIG_NFS_V4_1
765 static void show_pnfs(struct seq_file
*m
, struct nfs_server
*server
)
767 seq_printf(m
, ",pnfs=");
768 if (server
->pnfs_curr_ld
)
769 seq_printf(m
, "%s", server
->pnfs_curr_ld
->name
);
771 seq_printf(m
, "not configured");
774 static void show_implementation_id(struct seq_file
*m
, struct nfs_server
*nfss
)
776 if (nfss
->nfs_client
&& nfss
->nfs_client
->cl_implid
) {
777 struct nfs41_impl_id
*impl_id
= nfss
->nfs_client
->cl_implid
;
778 seq_printf(m
, "\n\timpl_id:\tname='%s',domain='%s',"
780 impl_id
->name
, impl_id
->domain
,
781 impl_id
->date
.seconds
, impl_id
->date
.nseconds
);
785 #if IS_ENABLED(CONFIG_NFS_V4)
786 static void show_pnfs(struct seq_file
*m
, struct nfs_server
*server
)
790 static void show_implementation_id(struct seq_file
*m
, struct nfs_server
*nfss
)
795 int nfs_show_devname(struct seq_file
*m
, struct dentry
*root
)
797 char *page
= (char *) __get_free_page(GFP_KERNEL
);
798 char *devname
, *dummy
;
802 devname
= nfs_path(&dummy
, root
, page
, PAGE_SIZE
, 0);
804 err
= PTR_ERR(devname
);
806 seq_escape(m
, devname
, " \t\n\\");
807 free_page((unsigned long)page
);
810 EXPORT_SYMBOL_GPL(nfs_show_devname
);
812 int nfs_show_path(struct seq_file
*m
, struct dentry
*dentry
)
817 EXPORT_SYMBOL_GPL(nfs_show_path
);
820 * Present statistical information for this VFS mountpoint
822 int nfs_show_stats(struct seq_file
*m
, struct dentry
*root
)
825 struct nfs_server
*nfss
= NFS_SB(root
->d_sb
);
826 struct rpc_auth
*auth
= nfss
->client
->cl_auth
;
827 struct nfs_iostats totals
= { };
829 seq_printf(m
, "statvers=%s", NFS_IOSTAT_VERS
);
832 * Display all mount option settings
834 seq_puts(m
, "\n\topts:\t");
835 seq_puts(m
, sb_rdonly(root
->d_sb
) ? "ro" : "rw");
836 seq_puts(m
, root
->d_sb
->s_flags
& SB_SYNCHRONOUS
? ",sync" : "");
837 seq_puts(m
, root
->d_sb
->s_flags
& SB_NOATIME
? ",noatime" : "");
838 seq_puts(m
, root
->d_sb
->s_flags
& SB_NODIRATIME
? ",nodiratime" : "");
839 nfs_show_mount_options(m
, nfss
, 1);
841 seq_printf(m
, "\n\tage:\t%lu", (jiffies
- nfss
->mount_time
) / HZ
);
843 show_implementation_id(m
, nfss
);
845 seq_puts(m
, "\n\tcaps:\t");
846 seq_printf(m
, "caps=0x%x", nfss
->caps
);
847 seq_printf(m
, ",wtmult=%u", nfss
->wtmult
);
848 seq_printf(m
, ",dtsize=%u", nfss
->dtsize
);
849 seq_printf(m
, ",bsize=%u", nfss
->bsize
);
850 seq_printf(m
, ",namlen=%u", nfss
->namelen
);
852 #if IS_ENABLED(CONFIG_NFS_V4)
853 if (nfss
->nfs_client
->rpc_ops
->version
== 4) {
854 seq_puts(m
, "\n\tnfsv4:\t");
855 seq_printf(m
, "bm0=0x%x", nfss
->attr_bitmask
[0]);
856 seq_printf(m
, ",bm1=0x%x", nfss
->attr_bitmask
[1]);
857 seq_printf(m
, ",bm2=0x%x", nfss
->attr_bitmask
[2]);
858 seq_printf(m
, ",acl=0x%x", nfss
->acl_bitmask
);
859 show_sessions(m
, nfss
);
866 * Display security flavor in effect for this mount
868 seq_printf(m
, "\n\tsec:\tflavor=%u", auth
->au_ops
->au_flavor
);
870 seq_printf(m
, ",pseudoflavor=%u", auth
->au_flavor
);
873 * Display superblock I/O counters
875 for_each_possible_cpu(cpu
) {
876 struct nfs_iostats
*stats
;
879 stats
= per_cpu_ptr(nfss
->io_stats
, cpu
);
881 for (i
= 0; i
< __NFSIOS_COUNTSMAX
; i
++)
882 totals
.events
[i
] += stats
->events
[i
];
883 for (i
= 0; i
< __NFSIOS_BYTESMAX
; i
++)
884 totals
.bytes
[i
] += stats
->bytes
[i
];
885 #ifdef CONFIG_NFS_FSCACHE
886 for (i
= 0; i
< __NFSIOS_FSCACHEMAX
; i
++)
887 totals
.fscache
[i
] += stats
->fscache
[i
];
893 seq_puts(m
, "\n\tevents:\t");
894 for (i
= 0; i
< __NFSIOS_COUNTSMAX
; i
++)
895 seq_printf(m
, "%lu ", totals
.events
[i
]);
896 seq_puts(m
, "\n\tbytes:\t");
897 for (i
= 0; i
< __NFSIOS_BYTESMAX
; i
++)
898 seq_printf(m
, "%Lu ", totals
.bytes
[i
]);
899 #ifdef CONFIG_NFS_FSCACHE
900 if (nfss
->options
& NFS_OPTION_FSCACHE
) {
901 seq_puts(m
, "\n\tfsc:\t");
902 for (i
= 0; i
< __NFSIOS_FSCACHEMAX
; i
++)
903 seq_printf(m
, "%Lu ", totals
.fscache
[i
]);
908 rpc_clnt_show_stats(m
, nfss
->client
);
912 EXPORT_SYMBOL_GPL(nfs_show_stats
);
915 * Begin unmount by attempting to remove all automounted mountpoints we added
916 * in response to xdev traversals and referrals
918 void nfs_umount_begin(struct super_block
*sb
)
920 struct nfs_server
*server
;
921 struct rpc_clnt
*rpc
;
924 /* -EIO all pending I/O */
925 rpc
= server
->client_acl
;
927 rpc_killall_tasks(rpc
);
928 rpc
= server
->client
;
930 rpc_killall_tasks(rpc
);
932 EXPORT_SYMBOL_GPL(nfs_umount_begin
);
934 static struct nfs_parsed_mount_data
*nfs_alloc_parsed_mount_data(void)
936 struct nfs_parsed_mount_data
*data
;
938 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
940 data
->timeo
= NFS_UNSPEC_TIMEO
;
941 data
->retrans
= NFS_UNSPEC_RETRANS
;
942 data
->acregmin
= NFS_DEF_ACREGMIN
;
943 data
->acregmax
= NFS_DEF_ACREGMAX
;
944 data
->acdirmin
= NFS_DEF_ACDIRMIN
;
945 data
->acdirmax
= NFS_DEF_ACDIRMAX
;
946 data
->mount_server
.port
= NFS_UNSPEC_PORT
;
947 data
->nfs_server
.port
= NFS_UNSPEC_PORT
;
948 data
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
949 data
->selected_flavor
= RPC_AUTH_MAXFLAVOR
;
950 data
->minorversion
= 0;
951 data
->need_mount
= true;
952 data
->net
= current
->nsproxy
->net_ns
;
953 data
->lsm_opts
= NULL
;
958 static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data
*data
)
961 kfree(data
->client_address
);
962 kfree(data
->mount_server
.hostname
);
963 kfree(data
->nfs_server
.export_path
);
964 kfree(data
->nfs_server
.hostname
);
965 kfree(data
->fscache_uniq
);
966 security_free_mnt_opts(&data
->lsm_opts
);
972 * Sanity-check a server address provided by the mount command.
974 * Address family must be initialized, and address must not be
975 * the ANY address for that family.
977 static int nfs_verify_server_address(struct sockaddr
*addr
)
979 switch (addr
->sa_family
) {
981 struct sockaddr_in
*sa
= (struct sockaddr_in
*)addr
;
982 return sa
->sin_addr
.s_addr
!= htonl(INADDR_ANY
);
985 struct in6_addr
*sa
= &((struct sockaddr_in6
*)addr
)->sin6_addr
;
986 return !ipv6_addr_any(sa
);
990 dfprintk(MOUNT
, "NFS: Invalid IP address specified\n");
995 * Select between a default port value and a user-specified port value.
996 * If a zero value is set, then autobind will be used.
998 static void nfs_set_port(struct sockaddr
*sap
, int *port
,
999 const unsigned short default_port
)
1001 if (*port
== NFS_UNSPEC_PORT
)
1002 *port
= default_port
;
1004 rpc_set_port(sap
, *port
);
1008 * Sanity check the NFS transport protocol.
1011 static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data
*mnt
)
1013 switch (mnt
->nfs_server
.protocol
) {
1014 case XPRT_TRANSPORT_UDP
:
1015 case XPRT_TRANSPORT_TCP
:
1016 case XPRT_TRANSPORT_RDMA
:
1019 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
1024 * For text based NFSv2/v3 mounts, the mount protocol transport default
1025 * settings should depend upon the specified NFS transport.
1027 static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data
*mnt
)
1029 nfs_validate_transport_protocol(mnt
);
1031 if (mnt
->mount_server
.protocol
== XPRT_TRANSPORT_UDP
||
1032 mnt
->mount_server
.protocol
== XPRT_TRANSPORT_TCP
)
1034 switch (mnt
->nfs_server
.protocol
) {
1035 case XPRT_TRANSPORT_UDP
:
1036 mnt
->mount_server
.protocol
= XPRT_TRANSPORT_UDP
;
1038 case XPRT_TRANSPORT_TCP
:
1039 case XPRT_TRANSPORT_RDMA
:
1040 mnt
->mount_server
.protocol
= XPRT_TRANSPORT_TCP
;
1045 * Add 'flavor' to 'auth_info' if not already present.
1046 * Returns true if 'flavor' ends up in the list, false otherwise
1048 static bool nfs_auth_info_add(struct nfs_auth_info
*auth_info
,
1049 rpc_authflavor_t flavor
)
1052 unsigned int max_flavor_len
= ARRAY_SIZE(auth_info
->flavors
);
1054 /* make sure this flavor isn't already in the list */
1055 for (i
= 0; i
< auth_info
->flavor_len
; i
++) {
1056 if (flavor
== auth_info
->flavors
[i
])
1060 if (auth_info
->flavor_len
+ 1 >= max_flavor_len
) {
1061 dfprintk(MOUNT
, "NFS: too many sec= flavors\n");
1065 auth_info
->flavors
[auth_info
->flavor_len
++] = flavor
;
1070 * Return true if 'match' is in auth_info or auth_info is empty.
1071 * Return false otherwise.
1073 bool nfs_auth_info_match(const struct nfs_auth_info
*auth_info
,
1074 rpc_authflavor_t match
)
1078 if (!auth_info
->flavor_len
)
1081 for (i
= 0; i
< auth_info
->flavor_len
; i
++) {
1082 if (auth_info
->flavors
[i
] == match
)
1087 EXPORT_SYMBOL_GPL(nfs_auth_info_match
);
1090 * Parse the value of the 'sec=' option.
1092 static int nfs_parse_security_flavors(char *value
,
1093 struct nfs_parsed_mount_data
*mnt
)
1095 substring_t args
[MAX_OPT_ARGS
];
1096 rpc_authflavor_t pseudoflavor
;
1099 dfprintk(MOUNT
, "NFS: parsing sec=%s option\n", value
);
1101 while ((p
= strsep(&value
, ":")) != NULL
) {
1102 switch (match_token(p
, nfs_secflavor_tokens
, args
)) {
1104 pseudoflavor
= RPC_AUTH_NULL
;
1107 pseudoflavor
= RPC_AUTH_UNIX
;
1110 pseudoflavor
= RPC_AUTH_GSS_KRB5
;
1113 pseudoflavor
= RPC_AUTH_GSS_KRB5I
;
1116 pseudoflavor
= RPC_AUTH_GSS_KRB5P
;
1119 pseudoflavor
= RPC_AUTH_GSS_LKEY
;
1122 pseudoflavor
= RPC_AUTH_GSS_LKEYI
;
1125 pseudoflavor
= RPC_AUTH_GSS_LKEYP
;
1128 pseudoflavor
= RPC_AUTH_GSS_SPKM
;
1131 pseudoflavor
= RPC_AUTH_GSS_SPKMI
;
1134 pseudoflavor
= RPC_AUTH_GSS_SPKMP
;
1138 "NFS: sec= option '%s' not recognized\n", p
);
1142 if (!nfs_auth_info_add(&mnt
->auth_info
, pseudoflavor
))
1149 static int nfs_parse_version_string(char *string
,
1150 struct nfs_parsed_mount_data
*mnt
,
1153 mnt
->flags
&= ~NFS_MOUNT_VER3
;
1154 switch (match_token(string
, nfs_vers_tokens
, args
)) {
1159 mnt
->flags
|= NFS_MOUNT_VER3
;
1163 /* Backward compatibility option. In future,
1164 * the mount program should always supply
1165 * a NFSv4 minor version number.
1171 mnt
->minorversion
= 0;
1175 mnt
->minorversion
= 1;
1179 mnt
->minorversion
= 2;
1187 static int nfs_get_option_str(substring_t args
[], char **option
)
1190 *option
= match_strdup(args
);
1194 static int nfs_get_option_ul(substring_t args
[], unsigned long *option
)
1199 string
= match_strdup(args
);
1202 rc
= kstrtoul(string
, 10, option
);
1208 static int nfs_get_option_ul_bound(substring_t args
[], unsigned long *option
,
1209 unsigned long l_bound
, unsigned long u_bound
)
1213 ret
= nfs_get_option_ul(args
, option
);
1216 if (*option
< l_bound
|| *option
> u_bound
)
1222 * Error-check and convert a string of mount options from user space into
1223 * a data structure. The whole mount string is processed; bad options are
1224 * skipped as they are encountered. If there were no errors, return 1;
1225 * otherwise return 0 (zero).
1227 static int nfs_parse_mount_options(char *raw
,
1228 struct nfs_parsed_mount_data
*mnt
)
1231 int rc
, sloppy
= 0, invalid_option
= 0;
1232 unsigned short protofamily
= AF_UNSPEC
;
1233 unsigned short mountfamily
= AF_UNSPEC
;
1236 dfprintk(MOUNT
, "NFS: mount options string was NULL.\n");
1239 dfprintk(MOUNT
, "NFS: nfs mount opts='%s'\n", raw
);
1241 rc
= security_sb_eat_lsm_opts(raw
, &mnt
->lsm_opts
);
1243 goto out_security_failure
;
1245 while ((p
= strsep(&raw
, ",")) != NULL
) {
1246 substring_t args
[MAX_OPT_ARGS
];
1247 unsigned long option
;
1253 dfprintk(MOUNT
, "NFS: parsing nfs mount option '%s'\n", p
);
1255 token
= match_token(p
, nfs_mount_option_tokens
, args
);
1259 * boolean options: foo/nofoo
1262 mnt
->flags
|= NFS_MOUNT_SOFT
;
1263 mnt
->flags
&= ~NFS_MOUNT_SOFTERR
;
1266 mnt
->flags
|= NFS_MOUNT_SOFTERR
;
1267 mnt
->flags
&= ~NFS_MOUNT_SOFT
;
1270 mnt
->flags
&= ~(NFS_MOUNT_SOFT
|NFS_MOUNT_SOFTERR
);
1273 mnt
->flags
|= NFS_MOUNT_POSIX
;
1276 mnt
->flags
&= ~NFS_MOUNT_POSIX
;
1279 mnt
->flags
&= ~NFS_MOUNT_NOCTO
;
1282 mnt
->flags
|= NFS_MOUNT_NOCTO
;
1285 mnt
->flags
&= ~NFS_MOUNT_NOAC
;
1288 mnt
->flags
|= NFS_MOUNT_NOAC
;
1291 mnt
->flags
&= ~NFS_MOUNT_NONLM
;
1292 mnt
->flags
&= ~(NFS_MOUNT_LOCAL_FLOCK
|
1293 NFS_MOUNT_LOCAL_FCNTL
);
1296 mnt
->flags
|= NFS_MOUNT_NONLM
;
1297 mnt
->flags
|= (NFS_MOUNT_LOCAL_FLOCK
|
1298 NFS_MOUNT_LOCAL_FCNTL
);
1301 mnt
->flags
&= ~NFS_MOUNT_TCP
;
1302 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_UDP
;
1305 mnt
->flags
|= NFS_MOUNT_TCP
;
1306 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
1309 mnt
->flags
|= NFS_MOUNT_TCP
; /* for side protocols */
1310 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_RDMA
;
1311 xprt_load_transport(p
);
1314 mnt
->flags
&= ~NFS_MOUNT_NOACL
;
1317 mnt
->flags
|= NFS_MOUNT_NOACL
;
1320 mnt
->flags
&= ~NFS_MOUNT_NORDIRPLUS
;
1322 case Opt_nordirplus
:
1323 mnt
->flags
|= NFS_MOUNT_NORDIRPLUS
;
1325 case Opt_sharecache
:
1326 mnt
->flags
&= ~NFS_MOUNT_UNSHARED
;
1328 case Opt_nosharecache
:
1329 mnt
->flags
|= NFS_MOUNT_UNSHARED
;
1332 mnt
->flags
&= ~NFS_MOUNT_NORESVPORT
;
1334 case Opt_noresvport
:
1335 mnt
->flags
|= NFS_MOUNT_NORESVPORT
;
1338 mnt
->options
|= NFS_OPTION_FSCACHE
;
1339 kfree(mnt
->fscache_uniq
);
1340 mnt
->fscache_uniq
= NULL
;
1343 mnt
->options
&= ~NFS_OPTION_FSCACHE
;
1344 kfree(mnt
->fscache_uniq
);
1345 mnt
->fscache_uniq
= NULL
;
1348 mnt
->options
|= NFS_OPTION_MIGRATION
;
1350 case Opt_nomigration
:
1351 mnt
->options
&= ~NFS_OPTION_MIGRATION
;
1355 * options that take numeric values
1358 if (nfs_get_option_ul(args
, &option
) ||
1360 goto out_invalid_value
;
1361 mnt
->nfs_server
.port
= option
;
1364 if (nfs_get_option_ul(args
, &option
))
1365 goto out_invalid_value
;
1366 mnt
->rsize
= option
;
1369 if (nfs_get_option_ul(args
, &option
))
1370 goto out_invalid_value
;
1371 mnt
->wsize
= option
;
1374 if (nfs_get_option_ul(args
, &option
))
1375 goto out_invalid_value
;
1376 mnt
->bsize
= option
;
1379 if (nfs_get_option_ul_bound(args
, &option
, 1, INT_MAX
))
1380 goto out_invalid_value
;
1381 mnt
->timeo
= option
;
1384 if (nfs_get_option_ul_bound(args
, &option
, 0, INT_MAX
))
1385 goto out_invalid_value
;
1386 mnt
->retrans
= option
;
1389 if (nfs_get_option_ul(args
, &option
))
1390 goto out_invalid_value
;
1391 mnt
->acregmin
= option
;
1394 if (nfs_get_option_ul(args
, &option
))
1395 goto out_invalid_value
;
1396 mnt
->acregmax
= option
;
1399 if (nfs_get_option_ul(args
, &option
))
1400 goto out_invalid_value
;
1401 mnt
->acdirmin
= option
;
1404 if (nfs_get_option_ul(args
, &option
))
1405 goto out_invalid_value
;
1406 mnt
->acdirmax
= option
;
1409 if (nfs_get_option_ul(args
, &option
))
1410 goto out_invalid_value
;
1411 mnt
->acregmin
= mnt
->acregmax
=
1412 mnt
->acdirmin
= mnt
->acdirmax
= option
;
1415 if (nfs_get_option_ul(args
, &option
))
1416 goto out_invalid_value
;
1417 mnt
->namlen
= option
;
1420 if (nfs_get_option_ul(args
, &option
) ||
1422 goto out_invalid_value
;
1423 mnt
->mount_server
.port
= option
;
1426 if (nfs_get_option_ul(args
, &option
) ||
1427 option
< NFS_MNT_VERSION
||
1428 option
> NFS_MNT3_VERSION
)
1429 goto out_invalid_value
;
1430 mnt
->mount_server
.version
= option
;
1432 case Opt_minorversion
:
1433 if (nfs_get_option_ul(args
, &option
))
1434 goto out_invalid_value
;
1435 if (option
> NFS4_MAX_MINOR_VERSION
)
1436 goto out_invalid_value
;
1437 mnt
->minorversion
= option
;
1441 * options that take text values
1444 string
= match_strdup(args
);
1447 rc
= nfs_parse_version_string(string
, mnt
, args
);
1450 goto out_invalid_value
;
1453 string
= match_strdup(args
);
1456 rc
= nfs_parse_security_flavors(string
, mnt
);
1459 dfprintk(MOUNT
, "NFS: unrecognized "
1460 "security flavor\n");
1465 string
= match_strdup(args
);
1468 token
= match_token(string
,
1469 nfs_xprt_protocol_tokens
, args
);
1471 protofamily
= AF_INET
;
1474 protofamily
= AF_INET6
;
1477 mnt
->flags
&= ~NFS_MOUNT_TCP
;
1478 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_UDP
;
1481 protofamily
= AF_INET6
;
1484 mnt
->flags
|= NFS_MOUNT_TCP
;
1485 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_TCP
;
1487 case Opt_xprt_rdma6
:
1488 protofamily
= AF_INET6
;
1491 /* vector side protocols to TCP */
1492 mnt
->flags
|= NFS_MOUNT_TCP
;
1493 mnt
->nfs_server
.protocol
= XPRT_TRANSPORT_RDMA
;
1494 xprt_load_transport(string
);
1497 dfprintk(MOUNT
, "NFS: unrecognized "
1498 "transport protocol\n");
1504 case Opt_mountproto
:
1505 string
= match_strdup(args
);
1508 token
= match_token(string
,
1509 nfs_xprt_protocol_tokens
, args
);
1512 mountfamily
= AF_INET
;
1515 mountfamily
= AF_INET6
;
1518 mnt
->mount_server
.protocol
= XPRT_TRANSPORT_UDP
;
1521 mountfamily
= AF_INET6
;
1524 mnt
->mount_server
.protocol
= XPRT_TRANSPORT_TCP
;
1526 case Opt_xprt_rdma
: /* not used for side protocols */
1528 dfprintk(MOUNT
, "NFS: unrecognized "
1529 "transport protocol\n");
1534 string
= match_strdup(args
);
1537 mnt
->nfs_server
.addrlen
=
1538 rpc_pton(mnt
->net
, string
, strlen(string
),
1540 &mnt
->nfs_server
.address
,
1541 sizeof(mnt
->nfs_server
.address
));
1543 if (mnt
->nfs_server
.addrlen
== 0)
1544 goto out_invalid_address
;
1546 case Opt_clientaddr
:
1547 if (nfs_get_option_str(args
, &mnt
->client_address
))
1551 if (nfs_get_option_str(args
,
1552 &mnt
->mount_server
.hostname
))
1556 string
= match_strdup(args
);
1559 mnt
->mount_server
.addrlen
=
1560 rpc_pton(mnt
->net
, string
, strlen(string
),
1562 &mnt
->mount_server
.address
,
1563 sizeof(mnt
->mount_server
.address
));
1565 if (mnt
->mount_server
.addrlen
== 0)
1566 goto out_invalid_address
;
1569 if (nfs_get_option_ul_bound(args
, &option
, 1, NFS_MAX_CONNECTIONS
))
1570 goto out_invalid_value
;
1571 mnt
->nfs_server
.nconnect
= option
;
1573 case Opt_lookupcache
:
1574 string
= match_strdup(args
);
1577 token
= match_token(string
,
1578 nfs_lookupcache_tokens
, args
);
1581 case Opt_lookupcache_all
:
1582 mnt
->flags
&= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG
|NFS_MOUNT_LOOKUP_CACHE_NONE
);
1584 case Opt_lookupcache_positive
:
1585 mnt
->flags
&= ~NFS_MOUNT_LOOKUP_CACHE_NONE
;
1586 mnt
->flags
|= NFS_MOUNT_LOOKUP_CACHE_NONEG
;
1588 case Opt_lookupcache_none
:
1589 mnt
->flags
|= NFS_MOUNT_LOOKUP_CACHE_NONEG
|NFS_MOUNT_LOOKUP_CACHE_NONE
;
1592 dfprintk(MOUNT
, "NFS: invalid "
1593 "lookupcache argument\n");
1597 case Opt_fscache_uniq
:
1598 if (nfs_get_option_str(args
, &mnt
->fscache_uniq
))
1600 mnt
->options
|= NFS_OPTION_FSCACHE
;
1602 case Opt_local_lock
:
1603 string
= match_strdup(args
);
1606 token
= match_token(string
, nfs_local_lock_tokens
,
1610 case Opt_local_lock_all
:
1611 mnt
->flags
|= (NFS_MOUNT_LOCAL_FLOCK
|
1612 NFS_MOUNT_LOCAL_FCNTL
);
1614 case Opt_local_lock_flock
:
1615 mnt
->flags
|= NFS_MOUNT_LOCAL_FLOCK
;
1617 case Opt_local_lock_posix
:
1618 mnt
->flags
|= NFS_MOUNT_LOCAL_FCNTL
;
1620 case Opt_local_lock_none
:
1621 mnt
->flags
&= ~(NFS_MOUNT_LOCAL_FLOCK
|
1622 NFS_MOUNT_LOCAL_FCNTL
);
1625 dfprintk(MOUNT
, "NFS: invalid "
1626 "local_lock argument\n");
1636 dfprintk(MOUNT
, "NFS: relaxing parsing rules\n");
1639 case Opt_deprecated
:
1640 dfprintk(MOUNT
, "NFS: ignoring mount option "
1646 dfprintk(MOUNT
, "NFS: unrecognized mount option "
1651 if (!sloppy
&& invalid_option
)
1654 if (mnt
->minorversion
&& mnt
->version
!= 4)
1655 goto out_minorversion_mismatch
;
1657 if (mnt
->options
& NFS_OPTION_MIGRATION
&&
1658 (mnt
->version
!= 4 || mnt
->minorversion
!= 0))
1659 goto out_migration_misuse
;
1662 * verify that any proto=/mountproto= options match the address
1663 * families in the addr=/mountaddr= options.
1665 if (protofamily
!= AF_UNSPEC
&&
1666 protofamily
!= mnt
->nfs_server
.address
.ss_family
)
1667 goto out_proto_mismatch
;
1669 if (mountfamily
!= AF_UNSPEC
) {
1670 if (mnt
->mount_server
.addrlen
) {
1671 if (mountfamily
!= mnt
->mount_server
.address
.ss_family
)
1672 goto out_mountproto_mismatch
;
1674 if (mountfamily
!= mnt
->nfs_server
.address
.ss_family
)
1675 goto out_mountproto_mismatch
;
1681 out_mountproto_mismatch
:
1682 printk(KERN_INFO
"NFS: mount server address does not match mountproto= "
1686 printk(KERN_INFO
"NFS: server address does not match proto= option\n");
1688 out_invalid_address
:
1689 printk(KERN_INFO
"NFS: bad IP address specified: %s\n", p
);
1692 printk(KERN_INFO
"NFS: bad mount option value specified: %s\n", p
);
1694 out_minorversion_mismatch
:
1695 printk(KERN_INFO
"NFS: mount option vers=%u does not support "
1696 "minorversion=%u\n", mnt
->version
, mnt
->minorversion
);
1698 out_migration_misuse
:
1700 "NFS: 'migration' not supported for this NFS version\n");
1703 printk(KERN_INFO
"NFS: not enough memory to parse option\n");
1705 out_security_failure
:
1706 printk(KERN_INFO
"NFS: security options invalid: %d\n", rc
);
1711 * Ensure that a specified authtype in args->auth_info is supported by
1712 * the server. Returns 0 and sets args->selected_flavor if it's ok, and
1715 static int nfs_verify_authflavors(struct nfs_parsed_mount_data
*args
,
1716 rpc_authflavor_t
*server_authlist
, unsigned int count
)
1718 rpc_authflavor_t flavor
= RPC_AUTH_MAXFLAVOR
;
1719 bool found_auth_null
= false;
1723 * If the sec= mount option is used, the specified flavor or AUTH_NULL
1724 * must be in the list returned by the server.
1726 * AUTH_NULL has a special meaning when it's in the server list - it
1727 * means that the server will ignore the rpc creds, so any flavor
1728 * can be used but still use the sec= that was specified.
1730 * Note also that the MNT procedure in MNTv1 does not return a list
1731 * of supported security flavors. In this case, nfs_mount() fabricates
1732 * a security flavor list containing just AUTH_NULL.
1734 for (i
= 0; i
< count
; i
++) {
1735 flavor
= server_authlist
[i
];
1737 if (nfs_auth_info_match(&args
->auth_info
, flavor
))
1740 if (flavor
== RPC_AUTH_NULL
)
1741 found_auth_null
= true;
1744 if (found_auth_null
) {
1745 flavor
= args
->auth_info
.flavors
[0];
1750 "NFS: specified auth flavors not supported by server\n");
1754 args
->selected_flavor
= flavor
;
1755 dfprintk(MOUNT
, "NFS: using auth flavor %u\n", args
->selected_flavor
);
1760 * Use the remote server's MOUNT service to request the NFS file handle
1761 * corresponding to the provided path.
1763 static int nfs_request_mount(struct nfs_parsed_mount_data
*args
,
1764 struct nfs_fh
*root_fh
,
1765 rpc_authflavor_t
*server_authlist
,
1766 unsigned int *server_authlist_len
)
1768 struct nfs_mount_request request
= {
1769 .sap
= (struct sockaddr
*)
1770 &args
->mount_server
.address
,
1771 .dirpath
= args
->nfs_server
.export_path
,
1772 .protocol
= args
->mount_server
.protocol
,
1774 .noresvport
= args
->flags
& NFS_MOUNT_NORESVPORT
,
1775 .auth_flav_len
= server_authlist_len
,
1776 .auth_flavs
= server_authlist
,
1781 if (args
->mount_server
.version
== 0) {
1782 switch (args
->version
) {
1784 args
->mount_server
.version
= NFS_MNT3_VERSION
;
1787 args
->mount_server
.version
= NFS_MNT_VERSION
;
1790 request
.version
= args
->mount_server
.version
;
1792 if (args
->mount_server
.hostname
)
1793 request
.hostname
= args
->mount_server
.hostname
;
1795 request
.hostname
= args
->nfs_server
.hostname
;
1798 * Construct the mount server's address.
1800 if (args
->mount_server
.address
.ss_family
== AF_UNSPEC
) {
1801 memcpy(request
.sap
, &args
->nfs_server
.address
,
1802 args
->nfs_server
.addrlen
);
1803 args
->mount_server
.addrlen
= args
->nfs_server
.addrlen
;
1805 request
.salen
= args
->mount_server
.addrlen
;
1806 nfs_set_port(request
.sap
, &args
->mount_server
.port
, 0);
1809 * Now ask the mount server to map our export path
1812 status
= nfs_mount(&request
);
1814 dfprintk(MOUNT
, "NFS: unable to mount server %s, error %d\n",
1815 request
.hostname
, status
);
1822 static struct nfs_server
*nfs_try_mount_request(struct nfs_mount_info
*mount_info
,
1823 struct nfs_subversion
*nfs_mod
)
1827 bool tried_auth_unix
= false;
1828 bool auth_null_in_list
= false;
1829 struct nfs_server
*server
= ERR_PTR(-EACCES
);
1830 struct nfs_parsed_mount_data
*args
= mount_info
->parsed
;
1831 rpc_authflavor_t authlist
[NFS_MAX_SECFLAVORS
];
1832 unsigned int authlist_len
= ARRAY_SIZE(authlist
);
1834 status
= nfs_request_mount(args
, mount_info
->mntfh
, authlist
,
1837 return ERR_PTR(status
);
1840 * Was a sec= authflavor specified in the options? First, verify
1841 * whether the server supports it, and then just try to use it if so.
1843 if (args
->auth_info
.flavor_len
> 0) {
1844 status
= nfs_verify_authflavors(args
, authlist
, authlist_len
);
1845 dfprintk(MOUNT
, "NFS: using auth flavor %u\n",
1846 args
->selected_flavor
);
1848 return ERR_PTR(status
);
1849 return nfs_mod
->rpc_ops
->create_server(mount_info
, nfs_mod
);
1853 * No sec= option was provided. RFC 2623, section 2.7 suggests we
1854 * SHOULD prefer the flavor listed first. However, some servers list
1855 * AUTH_NULL first. Avoid ever choosing AUTH_NULL.
1857 for (i
= 0; i
< authlist_len
; ++i
) {
1858 rpc_authflavor_t flavor
;
1859 struct rpcsec_gss_info info
;
1861 flavor
= authlist
[i
];
1864 tried_auth_unix
= true;
1867 auth_null_in_list
= true;
1870 if (rpcauth_get_gssinfo(flavor
, &info
) != 0)
1874 dfprintk(MOUNT
, "NFS: attempting to use auth flavor %u\n", flavor
);
1875 args
->selected_flavor
= flavor
;
1876 server
= nfs_mod
->rpc_ops
->create_server(mount_info
, nfs_mod
);
1877 if (!IS_ERR(server
))
1882 * Nothing we tried so far worked. At this point, give up if we've
1883 * already tried AUTH_UNIX or if the server's list doesn't contain
1886 if (tried_auth_unix
|| !auth_null_in_list
)
1889 /* Last chance! Try AUTH_UNIX */
1890 dfprintk(MOUNT
, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX
);
1891 args
->selected_flavor
= RPC_AUTH_UNIX
;
1892 return nfs_mod
->rpc_ops
->create_server(mount_info
, nfs_mod
);
1895 struct dentry
*nfs_try_mount(int flags
, const char *dev_name
,
1896 struct nfs_mount_info
*mount_info
,
1897 struct nfs_subversion
*nfs_mod
)
1899 struct nfs_server
*server
;
1901 if (mount_info
->parsed
->need_mount
)
1902 server
= nfs_try_mount_request(mount_info
, nfs_mod
);
1904 server
= nfs_mod
->rpc_ops
->create_server(mount_info
, nfs_mod
);
1907 return ERR_CAST(server
);
1909 return nfs_fs_mount_common(server
, flags
, dev_name
, mount_info
, nfs_mod
);
1911 EXPORT_SYMBOL_GPL(nfs_try_mount
);
1914 * Split "dev_name" into "hostname:export_path".
1916 * The leftmost colon demarks the split between the server's hostname
1917 * and the export path. If the hostname starts with a left square
1918 * bracket, then it may contain colons.
1920 * Note: caller frees hostname and export path, even on error.
1922 static int nfs_parse_devname(const char *dev_name
,
1923 char **hostname
, size_t maxnamlen
,
1924 char **export_path
, size_t maxpathlen
)
1929 if (unlikely(!dev_name
|| !*dev_name
)) {
1930 dfprintk(MOUNT
, "NFS: device name not specified\n");
1934 /* Is the host name protected with square brakcets? */
1935 if (*dev_name
== '[') {
1936 end
= strchr(++dev_name
, ']');
1937 if (end
== NULL
|| end
[1] != ':')
1938 goto out_bad_devname
;
1940 len
= end
- dev_name
;
1945 end
= strchr(dev_name
, ':');
1947 goto out_bad_devname
;
1948 len
= end
- dev_name
;
1950 /* kill possible hostname list: not supported */
1951 comma
= strchr(dev_name
, ',');
1952 if (comma
!= NULL
&& comma
< end
)
1953 len
= comma
- dev_name
;
1956 if (len
> maxnamlen
)
1959 /* N.B. caller will free nfs_server.hostname in all cases */
1960 *hostname
= kstrndup(dev_name
, len
, GFP_KERNEL
);
1961 if (*hostname
== NULL
)
1963 len
= strlen(++end
);
1964 if (len
> maxpathlen
)
1966 *export_path
= kstrndup(end
, len
, GFP_KERNEL
);
1970 dfprintk(MOUNT
, "NFS: MNTPATH: '%s'\n", *export_path
);
1974 dfprintk(MOUNT
, "NFS: device name not in host:path format\n");
1978 dfprintk(MOUNT
, "NFS: not enough memory to parse device name\n");
1982 dfprintk(MOUNT
, "NFS: server hostname too long\n");
1983 return -ENAMETOOLONG
;
1986 dfprintk(MOUNT
, "NFS: export pathname too long\n");
1987 return -ENAMETOOLONG
;
1991 * Validate the NFS2/NFS3 mount data
1992 * - fills in the mount root filehandle
1994 * For option strings, user space handles the following behaviors:
1996 * + DNS: mapping server host name to IP address ("addr=" option)
1998 * + failure mode: how to behave if a mount request can't be handled
1999 * immediately ("fg/bg" option)
2001 * + retry: how often to retry a mount request ("retry=" option)
2003 * + breaking back: trying proto=udp after proto=tcp, v2 after v3,
2004 * mountproto=tcp after mountproto=udp, and so on
2006 static int nfs23_validate_mount_data(void *options
,
2007 struct nfs_parsed_mount_data
*args
,
2008 struct nfs_fh
*mntfh
,
2009 const char *dev_name
)
2011 struct nfs_mount_data
*data
= (struct nfs_mount_data
*)options
;
2012 struct sockaddr
*sap
= (struct sockaddr
*)&args
->nfs_server
.address
;
2013 int extra_flags
= NFS_MOUNT_LEGACY_INTERFACE
;
2018 args
->version
= NFS_DEFAULT_VERSION
;
2019 switch (data
->version
) {
2021 data
->namlen
= 0; /* fall through */
2023 data
->bsize
= 0; /* fall through */
2025 if (data
->flags
& NFS_MOUNT_VER3
)
2027 data
->root
.size
= NFS2_FHSIZE
;
2028 memcpy(data
->root
.data
, data
->old_root
.data
, NFS2_FHSIZE
);
2029 /* Turn off security negotiation */
2030 extra_flags
|= NFS_MOUNT_SECFLAVOUR
;
2033 if (data
->flags
& NFS_MOUNT_SECFLAVOUR
)
2037 memset(data
->context
, 0, sizeof(data
->context
));
2040 if (data
->flags
& NFS_MOUNT_VER3
) {
2041 if (data
->root
.size
> NFS3_FHSIZE
|| data
->root
.size
== 0)
2042 goto out_invalid_fh
;
2043 mntfh
->size
= data
->root
.size
;
2046 mntfh
->size
= NFS2_FHSIZE
;
2051 memcpy(mntfh
->data
, data
->root
.data
, mntfh
->size
);
2052 if (mntfh
->size
< sizeof(mntfh
->data
))
2053 memset(mntfh
->data
+ mntfh
->size
, 0,
2054 sizeof(mntfh
->data
) - mntfh
->size
);
2057 * Translate to nfs_parsed_mount_data, which nfs_fill_super
2060 args
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
2061 args
->flags
|= extra_flags
;
2062 args
->rsize
= data
->rsize
;
2063 args
->wsize
= data
->wsize
;
2064 args
->timeo
= data
->timeo
;
2065 args
->retrans
= data
->retrans
;
2066 args
->acregmin
= data
->acregmin
;
2067 args
->acregmax
= data
->acregmax
;
2068 args
->acdirmin
= data
->acdirmin
;
2069 args
->acdirmax
= data
->acdirmax
;
2070 args
->need_mount
= false;
2072 memcpy(sap
, &data
->addr
, sizeof(data
->addr
));
2073 args
->nfs_server
.addrlen
= sizeof(data
->addr
);
2074 args
->nfs_server
.port
= ntohs(data
->addr
.sin_port
);
2075 if (sap
->sa_family
!= AF_INET
||
2076 !nfs_verify_server_address(sap
))
2077 goto out_no_address
;
2079 if (!(data
->flags
& NFS_MOUNT_TCP
))
2080 args
->nfs_server
.protocol
= XPRT_TRANSPORT_UDP
;
2081 /* N.B. caller will free nfs_server.hostname in all cases */
2082 args
->nfs_server
.hostname
= kstrdup(data
->hostname
, GFP_KERNEL
);
2083 args
->namlen
= data
->namlen
;
2084 args
->bsize
= data
->bsize
;
2086 if (data
->flags
& NFS_MOUNT_SECFLAVOUR
)
2087 args
->selected_flavor
= data
->pseudoflavor
;
2089 args
->selected_flavor
= RPC_AUTH_UNIX
;
2090 if (!args
->nfs_server
.hostname
)
2093 if (!(data
->flags
& NFS_MOUNT_NONLM
))
2094 args
->flags
&= ~(NFS_MOUNT_LOCAL_FLOCK
|
2095 NFS_MOUNT_LOCAL_FCNTL
);
2097 args
->flags
|= (NFS_MOUNT_LOCAL_FLOCK
|
2098 NFS_MOUNT_LOCAL_FCNTL
);
2100 * The legacy version 6 binary mount data from userspace has a
2101 * field used only to transport selinux information into the
2102 * the kernel. To continue to support that functionality we
2103 * have a touch of selinux knowledge here in the NFS code. The
2104 * userspace code converted context=blah to just blah so we are
2105 * converting back to the full string selinux understands.
2107 if (data
->context
[0]){
2108 #ifdef CONFIG_SECURITY_SELINUX
2110 data
->context
[NFS_MAX_CONTEXT_LEN
] = '\0';
2111 rc
= security_add_mnt_opt("context", data
->context
,
2112 strlen(data
->context
), &args
->lsm_opts
);
2122 return NFS_TEXT_DATA
;
2128 dfprintk(MOUNT
, "NFS: mount program didn't pass any mount data\n");
2132 dfprintk(MOUNT
, "NFS: nfs_mount_data version %d does not support v3\n",
2137 dfprintk(MOUNT
, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
2141 dfprintk(MOUNT
, "NFS: not enough memory to handle mount options\n");
2145 dfprintk(MOUNT
, "NFS: mount program didn't pass remote address\n");
2149 dfprintk(MOUNT
, "NFS: invalid root filehandle\n");
2153 #if IS_ENABLED(CONFIG_NFS_V4)
2154 static int nfs_validate_mount_data(struct file_system_type
*fs_type
,
2156 struct nfs_parsed_mount_data
*args
,
2157 struct nfs_fh
*mntfh
,
2158 const char *dev_name
)
2160 if (fs_type
== &nfs_fs_type
)
2161 return nfs23_validate_mount_data(options
, args
, mntfh
, dev_name
);
2162 return nfs4_validate_mount_data(options
, args
, dev_name
);
2165 static int nfs_validate_mount_data(struct file_system_type
*fs_type
,
2167 struct nfs_parsed_mount_data
*args
,
2168 struct nfs_fh
*mntfh
,
2169 const char *dev_name
)
2171 return nfs23_validate_mount_data(options
, args
, mntfh
, dev_name
);
2175 static int nfs_validate_text_mount_data(void *options
,
2176 struct nfs_parsed_mount_data
*args
,
2177 const char *dev_name
)
2180 int max_namelen
= PAGE_SIZE
;
2181 int max_pathlen
= NFS_MAXPATHLEN
;
2182 struct sockaddr
*sap
= (struct sockaddr
*)&args
->nfs_server
.address
;
2184 if (nfs_parse_mount_options((char *)options
, args
) == 0)
2187 if (!nfs_verify_server_address(sap
))
2188 goto out_no_address
;
2190 if (args
->version
== 4) {
2191 #if IS_ENABLED(CONFIG_NFS_V4)
2192 if (args
->nfs_server
.protocol
== XPRT_TRANSPORT_RDMA
)
2193 port
= NFS_RDMA_PORT
;
2196 max_namelen
= NFS4_MAXNAMLEN
;
2197 max_pathlen
= NFS4_MAXPATHLEN
;
2198 nfs_validate_transport_protocol(args
);
2199 if (args
->nfs_server
.protocol
== XPRT_TRANSPORT_UDP
)
2200 goto out_invalid_transport_udp
;
2201 nfs4_validate_mount_flags(args
);
2203 goto out_v4_not_compiled
;
2204 #endif /* CONFIG_NFS_V4 */
2206 nfs_set_mount_transport_protocol(args
);
2207 if (args
->nfs_server
.protocol
== XPRT_TRANSPORT_RDMA
)
2208 port
= NFS_RDMA_PORT
;
2211 nfs_set_port(sap
, &args
->nfs_server
.port
, port
);
2213 return nfs_parse_devname(dev_name
,
2214 &args
->nfs_server
.hostname
,
2216 &args
->nfs_server
.export_path
,
2219 #if !IS_ENABLED(CONFIG_NFS_V4)
2220 out_v4_not_compiled
:
2221 dfprintk(MOUNT
, "NFS: NFSv4 is not compiled into kernel\n");
2222 return -EPROTONOSUPPORT
;
2224 out_invalid_transport_udp
:
2225 dfprintk(MOUNT
, "NFSv4: Unsupported transport protocol udp\n");
2227 #endif /* !CONFIG_NFS_V4 */
2230 dfprintk(MOUNT
, "NFS: mount program didn't pass remote address\n");
2234 #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \
2235 | NFS_MOUNT_SECURE \
2238 | NFS_MOUNT_KERBEROS \
2240 | NFS_MOUNT_BROKEN_SUID \
2241 | NFS_MOUNT_STRICTLOCK \
2242 | NFS_MOUNT_LEGACY_INTERFACE)
2244 #define NFS_MOUNT_CMP_FLAGMASK (NFS_REMOUNT_CMP_FLAGMASK & \
2245 ~(NFS_MOUNT_UNSHARED | NFS_MOUNT_NORESVPORT))
2248 nfs_compare_remount_data(struct nfs_server
*nfss
,
2249 struct nfs_parsed_mount_data
*data
)
2251 if ((data
->flags
^ nfss
->flags
) & NFS_REMOUNT_CMP_FLAGMASK
||
2252 data
->rsize
!= nfss
->rsize
||
2253 data
->wsize
!= nfss
->wsize
||
2254 data
->version
!= nfss
->nfs_client
->rpc_ops
->version
||
2255 data
->minorversion
!= nfss
->nfs_client
->cl_minorversion
||
2256 data
->retrans
!= nfss
->client
->cl_timeout
->to_retries
||
2257 !nfs_auth_info_match(&data
->auth_info
, nfss
->client
->cl_auth
->au_flavor
) ||
2258 data
->acregmin
!= nfss
->acregmin
/ HZ
||
2259 data
->acregmax
!= nfss
->acregmax
/ HZ
||
2260 data
->acdirmin
!= nfss
->acdirmin
/ HZ
||
2261 data
->acdirmax
!= nfss
->acdirmax
/ HZ
||
2262 data
->timeo
!= (10U * nfss
->client
->cl_timeout
->to_initval
/ HZ
) ||
2263 (data
->options
& NFS_OPTION_FSCACHE
) != (nfss
->options
& NFS_OPTION_FSCACHE
) ||
2264 data
->nfs_server
.port
!= nfss
->port
||
2265 data
->nfs_server
.addrlen
!= nfss
->nfs_client
->cl_addrlen
||
2266 !rpc_cmp_addr((struct sockaddr
*)&data
->nfs_server
.address
,
2267 (struct sockaddr
*)&nfss
->nfs_client
->cl_addr
))
2274 nfs_remount(struct super_block
*sb
, int *flags
, char *raw_data
)
2277 struct nfs_server
*nfss
= sb
->s_fs_info
;
2278 struct nfs_parsed_mount_data
*data
;
2279 struct nfs_mount_data
*options
= (struct nfs_mount_data
*)raw_data
;
2280 struct nfs4_mount_data
*options4
= (struct nfs4_mount_data
*)raw_data
;
2281 u32 nfsvers
= nfss
->nfs_client
->rpc_ops
->version
;
2283 sync_filesystem(sb
);
2286 * Userspace mount programs that send binary options generally send
2287 * them populated with default values. We have no way to know which
2288 * ones were explicitly specified. Fall back to legacy behavior and
2289 * just return success.
2291 if ((nfsvers
== 4 && (!options4
|| options4
->version
== 1)) ||
2292 (nfsvers
<= 3 && (!options
|| (options
->version
>= 1 &&
2293 options
->version
<= 6))))
2296 data
= nfs_alloc_parsed_mount_data();
2300 /* fill out struct with values from existing mount */
2301 data
->flags
= nfss
->flags
;
2302 data
->rsize
= nfss
->rsize
;
2303 data
->wsize
= nfss
->wsize
;
2304 data
->retrans
= nfss
->client
->cl_timeout
->to_retries
;
2305 data
->selected_flavor
= nfss
->client
->cl_auth
->au_flavor
;
2306 data
->acregmin
= nfss
->acregmin
/ HZ
;
2307 data
->acregmax
= nfss
->acregmax
/ HZ
;
2308 data
->acdirmin
= nfss
->acdirmin
/ HZ
;
2309 data
->acdirmax
= nfss
->acdirmax
/ HZ
;
2310 data
->timeo
= 10U * nfss
->client
->cl_timeout
->to_initval
/ HZ
;
2311 data
->nfs_server
.port
= nfss
->port
;
2312 data
->nfs_server
.addrlen
= nfss
->nfs_client
->cl_addrlen
;
2313 data
->version
= nfsvers
;
2314 data
->minorversion
= nfss
->nfs_client
->cl_minorversion
;
2315 data
->net
= current
->nsproxy
->net_ns
;
2316 memcpy(&data
->nfs_server
.address
, &nfss
->nfs_client
->cl_addr
,
2317 data
->nfs_server
.addrlen
);
2319 /* overwrite those values with any that were specified */
2321 if (!nfs_parse_mount_options((char *)options
, data
))
2325 * noac is a special case. It implies -o sync, but that's not
2326 * necessarily reflected in the mtab options. do_remount_sb
2327 * will clear SB_SYNCHRONOUS if -o sync wasn't specified in the
2328 * remount options, so we have to explicitly reset it.
2330 if (data
->flags
& NFS_MOUNT_NOAC
)
2331 *flags
|= SB_SYNCHRONOUS
;
2333 /* compare new mount options with old ones */
2334 error
= nfs_compare_remount_data(nfss
, data
);
2336 error
= security_sb_remount(sb
, data
->lsm_opts
);
2338 nfs_free_parsed_mount_data(data
);
2341 EXPORT_SYMBOL_GPL(nfs_remount
);
2344 * Initialise the common bits of the superblock
2346 static void nfs_initialise_sb(struct super_block
*sb
)
2348 struct nfs_server
*server
= NFS_SB(sb
);
2350 sb
->s_magic
= NFS_SUPER_MAGIC
;
2352 /* We probably want something more informative here */
2353 snprintf(sb
->s_id
, sizeof(sb
->s_id
),
2354 "%u:%u", MAJOR(sb
->s_dev
), MINOR(sb
->s_dev
));
2356 if (sb
->s_blocksize
== 0)
2357 sb
->s_blocksize
= nfs_block_bits(server
->wsize
,
2358 &sb
->s_blocksize_bits
);
2360 nfs_super_set_maxbytes(sb
, server
->maxfilesize
);
2364 * Finish setting up an NFS2/3 superblock
2366 void nfs_fill_super(struct super_block
*sb
, struct nfs_mount_info
*mount_info
)
2368 struct nfs_parsed_mount_data
*data
= mount_info
->parsed
;
2369 struct nfs_server
*server
= NFS_SB(sb
);
2371 sb
->s_blocksize_bits
= 0;
2372 sb
->s_blocksize
= 0;
2373 sb
->s_xattr
= server
->nfs_client
->cl_nfs_mod
->xattr
;
2374 sb
->s_op
= server
->nfs_client
->cl_nfs_mod
->sops
;
2375 if (data
&& data
->bsize
)
2376 sb
->s_blocksize
= nfs_block_size(data
->bsize
, &sb
->s_blocksize_bits
);
2378 if (server
->nfs_client
->rpc_ops
->version
!= 2) {
2379 /* The VFS shouldn't apply the umask to mode bits. We will do
2380 * so ourselves when necessary.
2382 sb
->s_flags
|= SB_POSIXACL
;
2383 sb
->s_time_gran
= 1;
2384 sb
->s_export_op
= &nfs_export_ops
;
2386 sb
->s_time_gran
= 1000;
2388 if (server
->nfs_client
->rpc_ops
->version
!= 4) {
2390 sb
->s_time_max
= U32_MAX
;
2392 sb
->s_time_min
= S64_MIN
;
2393 sb
->s_time_max
= S64_MAX
;
2396 nfs_initialise_sb(sb
);
2398 EXPORT_SYMBOL_GPL(nfs_fill_super
);
2401 * Finish setting up a cloned NFS2/3/4 superblock
2403 static void nfs_clone_super(struct super_block
*sb
,
2404 struct nfs_mount_info
*mount_info
)
2406 const struct super_block
*old_sb
= mount_info
->cloned
->sb
;
2407 struct nfs_server
*server
= NFS_SB(sb
);
2409 sb
->s_blocksize_bits
= old_sb
->s_blocksize_bits
;
2410 sb
->s_blocksize
= old_sb
->s_blocksize
;
2411 sb
->s_maxbytes
= old_sb
->s_maxbytes
;
2412 sb
->s_xattr
= old_sb
->s_xattr
;
2413 sb
->s_op
= old_sb
->s_op
;
2414 sb
->s_export_op
= old_sb
->s_export_op
;
2416 if (server
->nfs_client
->rpc_ops
->version
!= 2) {
2417 /* The VFS shouldn't apply the umask to mode bits. We will do
2418 * so ourselves when necessary.
2420 sb
->s_flags
|= SB_POSIXACL
;
2421 sb
->s_time_gran
= 1;
2423 sb
->s_time_gran
= 1000;
2425 if (server
->nfs_client
->rpc_ops
->version
!= 4) {
2427 sb
->s_time_max
= U32_MAX
;
2429 sb
->s_time_min
= S64_MIN
;
2430 sb
->s_time_max
= S64_MAX
;
2433 nfs_initialise_sb(sb
);
2436 static int nfs_compare_mount_options(const struct super_block
*s
, const struct nfs_server
*b
, int flags
)
2438 const struct nfs_server
*a
= s
->s_fs_info
;
2439 const struct rpc_clnt
*clnt_a
= a
->client
;
2440 const struct rpc_clnt
*clnt_b
= b
->client
;
2442 if ((s
->s_flags
& NFS_MS_MASK
) != (flags
& NFS_MS_MASK
))
2444 if (a
->nfs_client
!= b
->nfs_client
)
2446 if ((a
->flags
^ b
->flags
) & NFS_MOUNT_CMP_FLAGMASK
)
2448 if (a
->wsize
!= b
->wsize
)
2450 if (a
->rsize
!= b
->rsize
)
2452 if (a
->acregmin
!= b
->acregmin
)
2454 if (a
->acregmax
!= b
->acregmax
)
2456 if (a
->acdirmin
!= b
->acdirmin
)
2458 if (a
->acdirmax
!= b
->acdirmax
)
2460 if (clnt_a
->cl_auth
->au_flavor
!= clnt_b
->cl_auth
->au_flavor
)
2467 struct nfs_sb_mountdata
{
2468 struct nfs_server
*server
;
2472 static int nfs_set_super(struct super_block
*s
, void *data
)
2474 struct nfs_sb_mountdata
*sb_mntdata
= data
;
2475 struct nfs_server
*server
= sb_mntdata
->server
;
2478 s
->s_flags
= sb_mntdata
->mntflags
;
2479 s
->s_fs_info
= server
;
2480 s
->s_d_op
= server
->nfs_client
->rpc_ops
->dentry_ops
;
2481 ret
= set_anon_super(s
, server
);
2483 server
->s_dev
= s
->s_dev
;
2487 static int nfs_compare_super_address(struct nfs_server
*server1
,
2488 struct nfs_server
*server2
)
2490 struct sockaddr
*sap1
, *sap2
;
2491 struct rpc_xprt
*xprt1
= server1
->client
->cl_xprt
;
2492 struct rpc_xprt
*xprt2
= server2
->client
->cl_xprt
;
2494 if (!net_eq(xprt1
->xprt_net
, xprt2
->xprt_net
))
2497 sap1
= (struct sockaddr
*)&server1
->nfs_client
->cl_addr
;
2498 sap2
= (struct sockaddr
*)&server2
->nfs_client
->cl_addr
;
2500 if (sap1
->sa_family
!= sap2
->sa_family
)
2503 switch (sap1
->sa_family
) {
2505 struct sockaddr_in
*sin1
= (struct sockaddr_in
*)sap1
;
2506 struct sockaddr_in
*sin2
= (struct sockaddr_in
*)sap2
;
2507 if (sin1
->sin_addr
.s_addr
!= sin2
->sin_addr
.s_addr
)
2509 if (sin1
->sin_port
!= sin2
->sin_port
)
2514 struct sockaddr_in6
*sin1
= (struct sockaddr_in6
*)sap1
;
2515 struct sockaddr_in6
*sin2
= (struct sockaddr_in6
*)sap2
;
2516 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
2518 if (sin1
->sin6_port
!= sin2
->sin6_port
)
2529 static int nfs_compare_userns(const struct nfs_server
*old
,
2530 const struct nfs_server
*new)
2532 const struct user_namespace
*oldns
= &init_user_ns
;
2533 const struct user_namespace
*newns
= &init_user_ns
;
2535 if (old
->client
&& old
->client
->cl_cred
)
2536 oldns
= old
->client
->cl_cred
->user_ns
;
2537 if (new->client
&& new->client
->cl_cred
)
2538 newns
= new->client
->cl_cred
->user_ns
;
2544 static int nfs_compare_super(struct super_block
*sb
, void *data
)
2546 struct nfs_sb_mountdata
*sb_mntdata
= data
;
2547 struct nfs_server
*server
= sb_mntdata
->server
, *old
= NFS_SB(sb
);
2548 int mntflags
= sb_mntdata
->mntflags
;
2550 if (!nfs_compare_super_address(old
, server
))
2552 /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */
2553 if (old
->flags
& NFS_MOUNT_UNSHARED
)
2555 if (memcmp(&old
->fsid
, &server
->fsid
, sizeof(old
->fsid
)) != 0)
2557 if (!nfs_compare_userns(old
, server
))
2559 return nfs_compare_mount_options(sb
, server
, mntflags
);
2562 #ifdef CONFIG_NFS_FSCACHE
2563 static void nfs_get_cache_cookie(struct super_block
*sb
,
2564 struct nfs_parsed_mount_data
*parsed
,
2565 struct nfs_clone_mount
*cloned
)
2567 struct nfs_server
*nfss
= NFS_SB(sb
);
2571 nfss
->fscache_key
= NULL
;
2572 nfss
->fscache
= NULL
;
2575 if (!(parsed
->options
& NFS_OPTION_FSCACHE
))
2577 if (parsed
->fscache_uniq
) {
2578 uniq
= parsed
->fscache_uniq
;
2579 ulen
= strlen(parsed
->fscache_uniq
);
2581 } else if (cloned
) {
2582 struct nfs_server
*mnt_s
= NFS_SB(cloned
->sb
);
2583 if (!(mnt_s
->options
& NFS_OPTION_FSCACHE
))
2585 if (mnt_s
->fscache_key
) {
2586 uniq
= mnt_s
->fscache_key
->key
.uniquifier
;
2587 ulen
= mnt_s
->fscache_key
->key
.uniq_len
;
2592 nfs_fscache_get_super_cookie(sb
, uniq
, ulen
);
2595 static void nfs_get_cache_cookie(struct super_block
*sb
,
2596 struct nfs_parsed_mount_data
*parsed
,
2597 struct nfs_clone_mount
*cloned
)
2602 int nfs_set_sb_security(struct super_block
*s
, struct dentry
*mntroot
,
2603 struct nfs_mount_info
*mount_info
)
2606 unsigned long kflags
= 0, kflags_out
= 0;
2607 if (NFS_SB(s
)->caps
& NFS_CAP_SECURITY_LABEL
)
2608 kflags
|= SECURITY_LSM_NATIVE_LABELS
;
2610 error
= security_sb_set_mnt_opts(s
, mount_info
->parsed
->lsm_opts
,
2611 kflags
, &kflags_out
);
2615 if (NFS_SB(s
)->caps
& NFS_CAP_SECURITY_LABEL
&&
2616 !(kflags_out
& SECURITY_LSM_NATIVE_LABELS
))
2617 NFS_SB(s
)->caps
&= ~NFS_CAP_SECURITY_LABEL
;
2621 EXPORT_SYMBOL_GPL(nfs_set_sb_security
);
2623 int nfs_clone_sb_security(struct super_block
*s
, struct dentry
*mntroot
,
2624 struct nfs_mount_info
*mount_info
)
2627 unsigned long kflags
= 0, kflags_out
= 0;
2629 /* clone any lsm security options from the parent to the new sb */
2630 if (d_inode(mntroot
)->i_op
!= NFS_SB(s
)->nfs_client
->rpc_ops
->dir_inode_ops
)
2633 if (NFS_SB(s
)->caps
& NFS_CAP_SECURITY_LABEL
)
2634 kflags
|= SECURITY_LSM_NATIVE_LABELS
;
2636 error
= security_sb_clone_mnt_opts(mount_info
->cloned
->sb
, s
, kflags
,
2641 if (NFS_SB(s
)->caps
& NFS_CAP_SECURITY_LABEL
&&
2642 !(kflags_out
& SECURITY_LSM_NATIVE_LABELS
))
2643 NFS_SB(s
)->caps
&= ~NFS_CAP_SECURITY_LABEL
;
2646 EXPORT_SYMBOL_GPL(nfs_clone_sb_security
);
2648 static void nfs_set_readahead(struct backing_dev_info
*bdi
,
2649 unsigned long iomax_pages
)
2651 bdi
->ra_pages
= VM_READAHEAD_PAGES
;
2652 bdi
->io_pages
= iomax_pages
;
2655 struct dentry
*nfs_fs_mount_common(struct nfs_server
*server
,
2656 int flags
, const char *dev_name
,
2657 struct nfs_mount_info
*mount_info
,
2658 struct nfs_subversion
*nfs_mod
)
2660 struct super_block
*s
;
2661 struct dentry
*mntroot
= ERR_PTR(-ENOMEM
);
2662 int (*compare_super
)(struct super_block
*, void *) = nfs_compare_super
;
2663 struct nfs_sb_mountdata sb_mntdata
= {
2669 if (server
->flags
& NFS_MOUNT_UNSHARED
)
2670 compare_super
= NULL
;
2672 /* -o noac implies -o sync */
2673 if (server
->flags
& NFS_MOUNT_NOAC
)
2674 sb_mntdata
.mntflags
|= SB_SYNCHRONOUS
;
2676 if (mount_info
->cloned
!= NULL
&& mount_info
->cloned
->sb
!= NULL
)
2677 if (mount_info
->cloned
->sb
->s_flags
& SB_SYNCHRONOUS
)
2678 sb_mntdata
.mntflags
|= SB_SYNCHRONOUS
;
2680 /* Get a superblock - note that we may end up sharing one that already exists */
2681 s
= sget(nfs_mod
->nfs_fs
, compare_super
, nfs_set_super
, flags
, &sb_mntdata
);
2683 mntroot
= ERR_CAST(s
);
2687 if (s
->s_fs_info
!= server
) {
2688 nfs_free_server(server
);
2691 error
= super_setup_bdi_name(s
, "%u:%u", MAJOR(server
->s_dev
),
2692 MINOR(server
->s_dev
));
2694 mntroot
= ERR_PTR(error
);
2695 goto error_splat_super
;
2697 nfs_set_readahead(s
->s_bdi
, server
->rpages
);
2702 /* initial superblock/root creation */
2703 mount_info
->fill_super(s
, mount_info
);
2704 nfs_get_cache_cookie(s
, mount_info
->parsed
, mount_info
->cloned
);
2705 if (!(server
->flags
& NFS_MOUNT_UNSHARED
))
2706 s
->s_iflags
|= SB_I_MULTIROOT
;
2709 mntroot
= nfs_get_root(s
, mount_info
->mntfh
, dev_name
);
2710 if (IS_ERR(mntroot
))
2711 goto error_splat_super
;
2713 error
= mount_info
->set_security(s
, mntroot
, mount_info
);
2715 goto error_splat_root
;
2717 s
->s_flags
|= SB_ACTIVE
;
2723 nfs_free_server(server
);
2728 mntroot
= ERR_PTR(error
);
2730 deactivate_locked_super(s
);
2733 EXPORT_SYMBOL_GPL(nfs_fs_mount_common
);
2735 struct dentry
*nfs_fs_mount(struct file_system_type
*fs_type
,
2736 int flags
, const char *dev_name
, void *raw_data
)
2738 struct nfs_mount_info mount_info
= {
2739 .fill_super
= nfs_fill_super
,
2740 .set_security
= nfs_set_sb_security
,
2742 struct dentry
*mntroot
= ERR_PTR(-ENOMEM
);
2743 struct nfs_subversion
*nfs_mod
;
2746 mount_info
.parsed
= nfs_alloc_parsed_mount_data();
2747 mount_info
.mntfh
= nfs_alloc_fhandle();
2748 if (mount_info
.parsed
== NULL
|| mount_info
.mntfh
== NULL
)
2751 /* Validate the mount data */
2752 error
= nfs_validate_mount_data(fs_type
, raw_data
, mount_info
.parsed
, mount_info
.mntfh
, dev_name
);
2753 if (error
== NFS_TEXT_DATA
)
2754 error
= nfs_validate_text_mount_data(raw_data
, mount_info
.parsed
, dev_name
);
2756 mntroot
= ERR_PTR(error
);
2760 nfs_mod
= get_nfs_version(mount_info
.parsed
->version
);
2761 if (IS_ERR(nfs_mod
)) {
2762 mntroot
= ERR_CAST(nfs_mod
);
2766 mntroot
= nfs_mod
->rpc_ops
->try_mount(flags
, dev_name
, &mount_info
, nfs_mod
);
2768 put_nfs_version(nfs_mod
);
2770 nfs_free_parsed_mount_data(mount_info
.parsed
);
2771 nfs_free_fhandle(mount_info
.mntfh
);
2774 EXPORT_SYMBOL_GPL(nfs_fs_mount
);
2777 * Destroy an NFS2/3 superblock
2779 void nfs_kill_super(struct super_block
*s
)
2781 struct nfs_server
*server
= NFS_SB(s
);
2782 dev_t dev
= s
->s_dev
;
2784 generic_shutdown_super(s
);
2786 nfs_fscache_release_super_cookie(s
);
2788 nfs_free_server(server
);
2789 free_anon_bdev(dev
);
2791 EXPORT_SYMBOL_GPL(nfs_kill_super
);
2794 * Clone an NFS2/3/4 server record on xdev traversal (FSID-change)
2796 static struct dentry
*
2797 nfs_xdev_mount(struct file_system_type
*fs_type
, int flags
,
2798 const char *dev_name
, void *raw_data
)
2800 struct nfs_clone_mount
*data
= raw_data
;
2801 struct nfs_mount_info mount_info
= {
2802 .fill_super
= nfs_clone_super
,
2803 .set_security
= nfs_clone_sb_security
,
2806 struct nfs_server
*server
;
2807 struct dentry
*mntroot
= ERR_PTR(-ENOMEM
);
2808 struct nfs_subversion
*nfs_mod
= NFS_SB(data
->sb
)->nfs_client
->cl_nfs_mod
;
2810 dprintk("--> nfs_xdev_mount()\n");
2812 mount_info
.mntfh
= mount_info
.cloned
->fh
;
2814 /* create a new volume representation */
2815 server
= nfs_mod
->rpc_ops
->clone_server(NFS_SB(data
->sb
), data
->fh
, data
->fattr
, data
->authflavor
);
2818 mntroot
= ERR_CAST(server
);
2820 mntroot
= nfs_fs_mount_common(server
, flags
,
2821 dev_name
, &mount_info
, nfs_mod
);
2823 dprintk("<-- nfs_xdev_mount() = %ld\n",
2824 IS_ERR(mntroot
) ? PTR_ERR(mntroot
) : 0L);
2828 #if IS_ENABLED(CONFIG_NFS_V4)
2830 static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data
*args
)
2832 args
->flags
&= ~(NFS_MOUNT_NONLM
|NFS_MOUNT_NOACL
|NFS_MOUNT_VER3
|
2833 NFS_MOUNT_LOCAL_FLOCK
|NFS_MOUNT_LOCAL_FCNTL
);
2837 * Validate NFSv4 mount options
2839 static int nfs4_validate_mount_data(void *options
,
2840 struct nfs_parsed_mount_data
*args
,
2841 const char *dev_name
)
2843 struct sockaddr
*sap
= (struct sockaddr
*)&args
->nfs_server
.address
;
2844 struct nfs4_mount_data
*data
= (struct nfs4_mount_data
*)options
;
2852 switch (data
->version
) {
2854 if (data
->host_addrlen
> sizeof(args
->nfs_server
.address
))
2855 goto out_no_address
;
2856 if (data
->host_addrlen
== 0)
2857 goto out_no_address
;
2858 args
->nfs_server
.addrlen
= data
->host_addrlen
;
2859 if (copy_from_user(sap
, data
->host_addr
, data
->host_addrlen
))
2861 if (!nfs_verify_server_address(sap
))
2862 goto out_no_address
;
2863 args
->nfs_server
.port
= ntohs(((struct sockaddr_in
*)sap
)->sin_port
);
2865 if (data
->auth_flavourlen
) {
2866 rpc_authflavor_t pseudoflavor
;
2867 if (data
->auth_flavourlen
> 1)
2868 goto out_inval_auth
;
2869 if (copy_from_user(&pseudoflavor
,
2870 data
->auth_flavours
,
2871 sizeof(pseudoflavor
)))
2873 args
->selected_flavor
= pseudoflavor
;
2875 args
->selected_flavor
= RPC_AUTH_UNIX
;
2877 c
= strndup_user(data
->hostname
.data
, NFS4_MAXNAMLEN
);
2880 args
->nfs_server
.hostname
= c
;
2882 c
= strndup_user(data
->mnt_path
.data
, NFS4_MAXPATHLEN
);
2885 args
->nfs_server
.export_path
= c
;
2886 dfprintk(MOUNT
, "NFS: MNTPATH: '%s'\n", c
);
2888 c
= strndup_user(data
->client_addr
.data
, 16);
2891 args
->client_address
= c
;
2894 * Translate to nfs_parsed_mount_data, which nfs4_fill_super
2898 args
->flags
= data
->flags
& NFS4_MOUNT_FLAGMASK
;
2899 args
->rsize
= data
->rsize
;
2900 args
->wsize
= data
->wsize
;
2901 args
->timeo
= data
->timeo
;
2902 args
->retrans
= data
->retrans
;
2903 args
->acregmin
= data
->acregmin
;
2904 args
->acregmax
= data
->acregmax
;
2905 args
->acdirmin
= data
->acdirmin
;
2906 args
->acdirmax
= data
->acdirmax
;
2907 args
->nfs_server
.protocol
= data
->proto
;
2908 nfs_validate_transport_protocol(args
);
2909 if (args
->nfs_server
.protocol
== XPRT_TRANSPORT_UDP
)
2910 goto out_invalid_transport_udp
;
2914 return NFS_TEXT_DATA
;
2920 dfprintk(MOUNT
, "NFS4: mount program didn't pass any mount data\n");
2924 dfprintk(MOUNT
, "NFS4: Invalid number of RPC auth flavours %d\n",
2925 data
->auth_flavourlen
);
2929 dfprintk(MOUNT
, "NFS4: mount program didn't pass remote address\n");
2932 out_invalid_transport_udp
:
2933 dfprintk(MOUNT
, "NFSv4: Unsupported transport protocol udp\n");
2938 * NFS v4 module parameters need to stay in the
2939 * NFS client for backwards compatibility
2941 unsigned int nfs_callback_set_tcpport
;
2942 unsigned short nfs_callback_nr_threads
;
2943 /* Default cache timeout is 10 minutes */
2944 unsigned int nfs_idmap_cache_timeout
= 600;
2945 /* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */
2946 bool nfs4_disable_idmapping
= true;
2947 unsigned short max_session_slots
= NFS4_DEF_SLOT_TABLE_SIZE
;
2948 unsigned short max_session_cb_slots
= NFS4_DEF_CB_SLOT_TABLE_SIZE
;
2949 unsigned short send_implementation_id
= 1;
2950 char nfs4_client_id_uniquifier
[NFS4_CLIENT_ID_UNIQ_LEN
] = "";
2951 bool recover_lost_locks
= false;
2953 EXPORT_SYMBOL_GPL(nfs_callback_nr_threads
);
2954 EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport
);
2955 EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout
);
2956 EXPORT_SYMBOL_GPL(nfs4_disable_idmapping
);
2957 EXPORT_SYMBOL_GPL(max_session_slots
);
2958 EXPORT_SYMBOL_GPL(max_session_cb_slots
);
2959 EXPORT_SYMBOL_GPL(send_implementation_id
);
2960 EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier
);
2961 EXPORT_SYMBOL_GPL(recover_lost_locks
);
2963 #define NFS_CALLBACK_MAXPORTNR (65535U)
2965 static int param_set_portnr(const char *val
, const struct kernel_param
*kp
)
2972 ret
= kstrtoul(val
, 0, &num
);
2973 if (ret
|| num
> NFS_CALLBACK_MAXPORTNR
)
2975 *((unsigned int *)kp
->arg
) = num
;
2978 static const struct kernel_param_ops param_ops_portnr
= {
2979 .set
= param_set_portnr
,
2980 .get
= param_get_uint
,
2982 #define param_check_portnr(name, p) __param_check(name, p, unsigned int);
2984 module_param_named(callback_tcpport
, nfs_callback_set_tcpport
, portnr
, 0644);
2985 module_param_named(callback_nr_threads
, nfs_callback_nr_threads
, ushort
, 0644);
2986 MODULE_PARM_DESC(callback_nr_threads
, "Number of threads that will be "
2987 "assigned to the NFSv4 callback channels.");
2988 module_param(nfs_idmap_cache_timeout
, int, 0644);
2989 module_param(nfs4_disable_idmapping
, bool, 0644);
2990 module_param_string(nfs4_unique_id
, nfs4_client_id_uniquifier
,
2991 NFS4_CLIENT_ID_UNIQ_LEN
, 0600);
2992 MODULE_PARM_DESC(nfs4_disable_idmapping
,
2993 "Turn off NFSv4 idmapping when using 'sec=sys'");
2994 module_param(max_session_slots
, ushort
, 0644);
2995 MODULE_PARM_DESC(max_session_slots
, "Maximum number of outstanding NFSv4.1 "
2996 "requests the client will negotiate");
2997 module_param(max_session_cb_slots
, ushort
, 0644);
2998 MODULE_PARM_DESC(max_session_cb_slots
, "Maximum number of parallel NFSv4.1 "
2999 "callbacks the client will process for a given server");
3000 module_param(send_implementation_id
, ushort
, 0644);
3001 MODULE_PARM_DESC(send_implementation_id
,
3002 "Send implementation ID with NFSv4.1 exchange_id");
3003 MODULE_PARM_DESC(nfs4_unique_id
, "nfs_client_id4 uniquifier string");
3005 module_param(recover_lost_locks
, bool, 0644);
3006 MODULE_PARM_DESC(recover_lost_locks
,
3007 "If the server reports that a lock might be lost, "
3008 "try to recover it risking data corruption.");
3011 #endif /* CONFIG_NFS_V4 */