1 /* client.c: NFS client sharing and management code
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include <linux/time.h>
17 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/stat.h>
21 #include <linux/errno.h>
22 #include <linux/unistd.h>
23 #include <linux/sunrpc/clnt.h>
24 #include <linux/sunrpc/stats.h>
25 #include <linux/sunrpc/metrics.h>
26 #include <linux/sunrpc/xprtsock.h>
27 #include <linux/sunrpc/xprtrdma.h>
28 #include <linux/nfs_fs.h>
29 #include <linux/nfs_mount.h>
30 #include <linux/nfs4_mount.h>
31 #include <linux/lockd/bind.h>
32 #include <linux/seq_file.h>
33 #include <linux/mount.h>
34 #include <linux/nfs_idmap.h>
35 #include <linux/vfs.h>
36 #include <linux/inet.h>
37 #include <linux/in6.h>
38 #include <linux/slab.h>
39 #include <linux/idr.h>
41 #include <linux/nfs_xdr.h>
42 #include <linux/sunrpc/bc_xprt.h>
43 #include <linux/nsproxy.h>
44 #include <linux/pid_namespace.h>
49 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_CLIENT
59 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
60 static DEFINE_SPINLOCK(nfs_version_lock
);
61 static DEFINE_MUTEX(nfs_version_mutex
);
62 static LIST_HEAD(nfs_versions
);
67 static const struct rpc_version
*nfs_version
[5] = {
73 const struct rpc_program nfs_program
= {
75 .number
= NFS_PROGRAM
,
76 .nrvers
= ARRAY_SIZE(nfs_version
),
77 .version
= nfs_version
,
78 .stats
= &nfs_rpcstat
,
79 .pipe_dir_name
= NFS_PIPE_DIRNAME
,
82 struct rpc_stat nfs_rpcstat
= {
83 .program
= &nfs_program
86 static struct nfs_subversion
*find_nfs_version(unsigned int version
)
88 struct nfs_subversion
*nfs
;
89 spin_lock(&nfs_version_lock
);
91 list_for_each_entry(nfs
, &nfs_versions
, list
) {
92 if (nfs
->rpc_ops
->version
== version
) {
93 spin_unlock(&nfs_version_lock
);
98 spin_unlock(&nfs_version_lock
);
99 return ERR_PTR(-EPROTONOSUPPORT
);;
102 struct nfs_subversion
*get_nfs_version(unsigned int version
)
104 struct nfs_subversion
*nfs
= find_nfs_version(version
);
107 mutex_lock(&nfs_version_mutex
);
108 request_module("nfs%d", version
);
109 nfs
= find_nfs_version(version
);
110 mutex_unlock(&nfs_version_mutex
);
114 try_module_get(nfs
->owner
);
118 void put_nfs_version(struct nfs_subversion
*nfs
)
120 module_put(nfs
->owner
);
123 void register_nfs_version(struct nfs_subversion
*nfs
)
125 spin_lock(&nfs_version_lock
);
127 list_add(&nfs
->list
, &nfs_versions
);
128 nfs_version
[nfs
->rpc_ops
->version
] = nfs
->rpc_vers
;
130 spin_unlock(&nfs_version_lock
);
132 EXPORT_SYMBOL_GPL(register_nfs_version
);
134 void unregister_nfs_version(struct nfs_subversion
*nfs
)
136 spin_lock(&nfs_version_lock
);
138 nfs_version
[nfs
->rpc_ops
->version
] = NULL
;
139 list_del(&nfs
->list
);
141 spin_unlock(&nfs_version_lock
);
143 EXPORT_SYMBOL_GPL(unregister_nfs_version
);
146 * Allocate a shared client record
148 * Since these are allocated/deallocated very rarely, we don't
149 * bother putting them in a slab cache...
151 struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
153 struct nfs_client
*clp
;
154 struct rpc_cred
*cred
;
157 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
160 clp
->cl_nfs_mod
= cl_init
->nfs_mod
;
161 try_module_get(clp
->cl_nfs_mod
->owner
);
163 clp
->rpc_ops
= clp
->cl_nfs_mod
->rpc_ops
;
165 atomic_set(&clp
->cl_count
, 1);
166 clp
->cl_cons_state
= NFS_CS_INITING
;
168 memcpy(&clp
->cl_addr
, cl_init
->addr
, cl_init
->addrlen
);
169 clp
->cl_addrlen
= cl_init
->addrlen
;
171 if (cl_init
->hostname
) {
173 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
174 if (!clp
->cl_hostname
)
178 INIT_LIST_HEAD(&clp
->cl_superblocks
);
179 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
181 clp
->cl_proto
= cl_init
->proto
;
182 clp
->cl_net
= get_net(cl_init
->net
);
184 cred
= rpc_lookup_machine_cred("*");
186 clp
->cl_machine_cred
= cred
;
187 nfs_fscache_get_client_cookie(clp
);
192 put_nfs_version(clp
->cl_nfs_mod
);
197 EXPORT_SYMBOL_GPL(nfs_alloc_client
);
199 #if IS_ENABLED(CONFIG_NFS_V4)
200 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
201 void nfs_cleanup_cb_ident_idr(struct net
*net
)
203 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
205 idr_destroy(&nn
->cb_ident_idr
);
208 /* nfs_client_lock held */
209 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
211 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
213 if (clp
->cl_cb_ident
)
214 idr_remove(&nn
->cb_ident_idr
, clp
->cl_cb_ident
);
217 static void pnfs_init_server(struct nfs_server
*server
)
219 rpc_init_wait_queue(&server
->roc_rpcwaitq
, "pNFS ROC");
223 void nfs_cleanup_cb_ident_idr(struct net
*net
)
227 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
231 static void pnfs_init_server(struct nfs_server
*server
)
235 #endif /* CONFIG_NFS_V4 */
238 * Destroy a shared client record
240 void nfs_free_client(struct nfs_client
*clp
)
242 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
244 nfs_fscache_release_client_cookie(clp
);
246 /* -EIO all pending I/O */
247 if (!IS_ERR(clp
->cl_rpcclient
))
248 rpc_shutdown_client(clp
->cl_rpcclient
);
250 if (clp
->cl_machine_cred
!= NULL
)
251 put_rpccred(clp
->cl_machine_cred
);
253 put_net(clp
->cl_net
);
254 put_nfs_version(clp
->cl_nfs_mod
);
255 kfree(clp
->cl_hostname
);
258 dprintk("<-- nfs_free_client()\n");
260 EXPORT_SYMBOL_GPL(nfs_free_client
);
263 * Release a reference to a shared client record
265 void nfs_put_client(struct nfs_client
*clp
)
272 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
273 nn
= net_generic(clp
->cl_net
, nfs_net_id
);
275 if (atomic_dec_and_lock(&clp
->cl_count
, &nn
->nfs_client_lock
)) {
276 list_del(&clp
->cl_share_link
);
277 nfs_cb_idr_remove_locked(clp
);
278 spin_unlock(&nn
->nfs_client_lock
);
280 BUG_ON(!list_empty(&clp
->cl_superblocks
));
282 clp
->rpc_ops
->free_client(clp
);
285 EXPORT_SYMBOL_GPL(nfs_put_client
);
287 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
289 * Test if two ip6 socket addresses refer to the same socket by
290 * comparing relevant fields. The padding bytes specifically, are not
291 * compared. sin6_flowinfo is not compared because it only affects QoS
292 * and sin6_scope_id is only compared if the address is "link local"
293 * because "link local" addresses need only be unique to a specific
294 * link. Conversely, ordinary unicast addresses might have different
297 * The caller should ensure both socket addresses are AF_INET6.
299 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
300 const struct sockaddr
*sa2
)
302 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
303 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
305 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
307 else if (ipv6_addr_type(&sin1
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
308 return sin1
->sin6_scope_id
== sin2
->sin6_scope_id
;
312 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
313 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
314 const struct sockaddr
*sa2
)
321 * Test if two ip4 socket addresses refer to the same socket, by
322 * comparing relevant fields. The padding bytes specifically, are
325 * The caller should ensure both socket addresses are AF_INET.
327 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
328 const struct sockaddr
*sa2
)
330 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
331 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
333 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
336 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
337 const struct sockaddr
*sa2
)
339 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
340 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
342 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
343 (sin1
->sin6_port
== sin2
->sin6_port
);
346 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
347 const struct sockaddr
*sa2
)
349 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
350 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
352 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
353 (sin1
->sin_port
== sin2
->sin_port
);
356 #if defined(CONFIG_NFS_V4_1)
358 * Test if two socket addresses represent the same actual socket,
359 * by comparing (only) relevant fields, excluding the port number.
361 int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
362 const struct sockaddr
*sa2
)
364 if (sa1
->sa_family
!= sa2
->sa_family
)
367 switch (sa1
->sa_family
) {
369 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
371 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
375 EXPORT_SYMBOL_GPL(nfs_sockaddr_match_ipaddr
);
376 #endif /* CONFIG_NFS_V4_1 */
379 * Test if two socket addresses represent the same actual socket,
380 * by comparing (only) relevant fields, including the port number.
382 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
383 const struct sockaddr
*sa2
)
385 if (sa1
->sa_family
!= sa2
->sa_family
)
388 switch (sa1
->sa_family
) {
390 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
392 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
398 * Find an nfs_client on the list that matches the initialisation data
401 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
403 struct nfs_client
*clp
;
404 const struct sockaddr
*sap
= data
->addr
;
405 struct nfs_net
*nn
= net_generic(data
->net
, nfs_net_id
);
407 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
408 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
409 /* Don't match clients that failed to initialise properly */
410 if (clp
->cl_cons_state
< 0)
413 /* Different NFS versions cannot share the same nfs_client */
414 if (clp
->rpc_ops
!= data
->nfs_mod
->rpc_ops
)
417 if (clp
->cl_proto
!= data
->proto
)
419 /* Match nfsv4 minorversion */
420 if (clp
->cl_minorversion
!= data
->minorversion
)
422 /* Match the full socket address */
423 if (!nfs_sockaddr_cmp(sap
, clap
))
426 atomic_inc(&clp
->cl_count
);
432 static bool nfs_client_init_is_complete(const struct nfs_client
*clp
)
434 return clp
->cl_cons_state
!= NFS_CS_INITING
;
437 int nfs_wait_client_init_complete(const struct nfs_client
*clp
)
439 return wait_event_killable(nfs_client_active_wq
,
440 nfs_client_init_is_complete(clp
));
442 EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete
);
445 * Found an existing client. Make sure it's ready before returning.
447 static struct nfs_client
*
448 nfs_found_client(const struct nfs_client_initdata
*cl_init
,
449 struct nfs_client
*clp
)
453 error
= nfs_wait_client_init_complete(clp
);
456 return ERR_PTR(-ERESTARTSYS
);
459 if (clp
->cl_cons_state
< NFS_CS_READY
) {
460 error
= clp
->cl_cons_state
;
462 return ERR_PTR(error
);
467 dprintk("<-- %s found nfs_client %p for %s\n",
468 __func__
, clp
, cl_init
->hostname
?: "");
473 * Look up a client by IP address and protocol version
474 * - creates a new record if one doesn't yet exist
477 nfs_get_client(const struct nfs_client_initdata
*cl_init
,
478 const struct rpc_timeout
*timeparms
,
480 rpc_authflavor_t authflavour
)
482 struct nfs_client
*clp
, *new = NULL
;
483 struct nfs_net
*nn
= net_generic(cl_init
->net
, nfs_net_id
);
484 const struct nfs_rpc_ops
*rpc_ops
= cl_init
->nfs_mod
->rpc_ops
;
486 dprintk("--> nfs_get_client(%s,v%u)\n",
487 cl_init
->hostname
?: "", rpc_ops
->version
);
489 /* see if the client already exists */
491 spin_lock(&nn
->nfs_client_lock
);
493 clp
= nfs_match_client(cl_init
);
495 spin_unlock(&nn
->nfs_client_lock
);
497 new->rpc_ops
->free_client(new);
498 return nfs_found_client(cl_init
, clp
);
501 list_add(&new->cl_share_link
, &nn
->nfs_client_list
);
502 spin_unlock(&nn
->nfs_client_lock
);
503 new->cl_flags
= cl_init
->init_flags
;
504 return rpc_ops
->init_client(new, timeparms
, ip_addr
,
508 spin_unlock(&nn
->nfs_client_lock
);
510 new = rpc_ops
->alloc_client(cl_init
);
511 } while (!IS_ERR(new));
513 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
514 cl_init
->hostname
?: "", PTR_ERR(new));
517 EXPORT_SYMBOL_GPL(nfs_get_client
);
520 * Mark a server as ready or failed
522 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
525 clp
->cl_cons_state
= state
;
526 wake_up_all(&nfs_client_active_wq
);
528 EXPORT_SYMBOL_GPL(nfs_mark_client_ready
);
531 * Initialise the timeout values for a connection
533 void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
534 unsigned int timeo
, unsigned int retrans
)
536 to
->to_initval
= timeo
* HZ
/ 10;
537 to
->to_retries
= retrans
;
540 case XPRT_TRANSPORT_TCP
:
541 case XPRT_TRANSPORT_RDMA
:
542 if (to
->to_retries
== 0)
543 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
544 if (to
->to_initval
== 0)
545 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
546 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
547 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
548 to
->to_increment
= to
->to_initval
;
549 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
550 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
551 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
552 if (to
->to_maxval
< to
->to_initval
)
553 to
->to_maxval
= to
->to_initval
;
554 to
->to_exponential
= 0;
556 case XPRT_TRANSPORT_UDP
:
557 if (to
->to_retries
== 0)
558 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
560 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
561 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
562 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
563 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
564 to
->to_exponential
= 1;
570 EXPORT_SYMBOL_GPL(nfs_init_timeout_values
);
573 * Create an RPC client handle
575 int nfs_create_rpc_client(struct nfs_client
*clp
,
576 const struct rpc_timeout
*timeparms
,
577 rpc_authflavor_t flavor
)
579 struct rpc_clnt
*clnt
= NULL
;
580 struct rpc_create_args args
= {
582 .protocol
= clp
->cl_proto
,
583 .address
= (struct sockaddr
*)&clp
->cl_addr
,
584 .addrsize
= clp
->cl_addrlen
,
585 .timeout
= timeparms
,
586 .servername
= clp
->cl_hostname
,
587 .program
= &nfs_program
,
588 .version
= clp
->rpc_ops
->version
,
589 .authflavor
= flavor
,
592 if (test_bit(NFS_CS_DISCRTRY
, &clp
->cl_flags
))
593 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
594 if (test_bit(NFS_CS_NORESVPORT
, &clp
->cl_flags
))
595 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
597 if (!IS_ERR(clp
->cl_rpcclient
))
600 clnt
= rpc_create(&args
);
602 dprintk("%s: cannot create RPC client. Error = %ld\n",
603 __func__
, PTR_ERR(clnt
));
604 return PTR_ERR(clnt
);
607 clp
->cl_rpcclient
= clnt
;
610 EXPORT_SYMBOL_GPL(nfs_create_rpc_client
);
613 * Version 2 or 3 client destruction
615 static void nfs_destroy_server(struct nfs_server
*server
)
617 if (!(server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) ||
618 !(server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
619 nlmclnt_done(server
->nlm_host
);
623 * Version 2 or 3 lockd setup
625 static int nfs_start_lockd(struct nfs_server
*server
)
627 struct nlm_host
*host
;
628 struct nfs_client
*clp
= server
->nfs_client
;
629 struct nlmclnt_initdata nlm_init
= {
630 .hostname
= clp
->cl_hostname
,
631 .address
= (struct sockaddr
*)&clp
->cl_addr
,
632 .addrlen
= clp
->cl_addrlen
,
633 .nfs_version
= clp
->rpc_ops
->version
,
634 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
639 if (nlm_init
.nfs_version
> 3)
641 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
642 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
645 switch (clp
->cl_proto
) {
647 nlm_init
.protocol
= IPPROTO_TCP
;
649 case XPRT_TRANSPORT_UDP
:
650 nlm_init
.protocol
= IPPROTO_UDP
;
653 host
= nlmclnt_init(&nlm_init
);
655 return PTR_ERR(host
);
657 server
->nlm_host
= host
;
658 server
->destroy
= nfs_destroy_server
;
663 * Create a general RPC client
665 int nfs_init_server_rpcclient(struct nfs_server
*server
,
666 const struct rpc_timeout
*timeo
,
667 rpc_authflavor_t pseudoflavour
)
669 struct nfs_client
*clp
= server
->nfs_client
;
671 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
672 if (IS_ERR(server
->client
)) {
673 dprintk("%s: couldn't create rpc_client!\n", __func__
);
674 return PTR_ERR(server
->client
);
677 memcpy(&server
->client
->cl_timeout_default
,
679 sizeof(server
->client
->cl_timeout_default
));
680 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
682 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
683 struct rpc_auth
*auth
;
685 auth
= rpcauth_create(pseudoflavour
, server
->client
);
687 dprintk("%s: couldn't create credcache!\n", __func__
);
688 return PTR_ERR(auth
);
691 server
->client
->cl_softrtry
= 0;
692 if (server
->flags
& NFS_MOUNT_SOFT
)
693 server
->client
->cl_softrtry
= 1;
697 EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient
);
700 * nfs_init_client - Initialise an NFS2 or NFS3 client
702 * @clp: nfs_client to initialise
703 * @timeparms: timeout parameters for underlying RPC transport
704 * @ip_addr: IP presentation address (not used)
705 * @authflavor: authentication flavor for underlying RPC transport
707 * Returns pointer to an NFS client, or an ERR_PTR value.
709 struct nfs_client
*nfs_init_client(struct nfs_client
*clp
,
710 const struct rpc_timeout
*timeparms
,
711 const char *ip_addr
, rpc_authflavor_t authflavour
)
715 if (clp
->cl_cons_state
== NFS_CS_READY
) {
716 /* the client is already initialised */
717 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
722 * Create a client RPC handle for doing FSSTAT with UNIX auth only
723 * - RFC 2623, sec 2.3.2
725 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
);
728 nfs_mark_client_ready(clp
, NFS_CS_READY
);
732 nfs_mark_client_ready(clp
, error
);
734 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
735 return ERR_PTR(error
);
737 EXPORT_SYMBOL_GPL(nfs_init_client
);
740 * Create a version 2 or 3 client
742 static int nfs_init_server(struct nfs_server
*server
,
743 const struct nfs_parsed_mount_data
*data
,
744 struct nfs_subversion
*nfs_mod
)
746 struct nfs_client_initdata cl_init
= {
747 .hostname
= data
->nfs_server
.hostname
,
748 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
749 .addrlen
= data
->nfs_server
.addrlen
,
751 .proto
= data
->nfs_server
.protocol
,
754 struct rpc_timeout timeparms
;
755 struct nfs_client
*clp
;
758 dprintk("--> nfs_init_server()\n");
760 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
761 data
->timeo
, data
->retrans
);
762 if (data
->flags
& NFS_MOUNT_NORESVPORT
)
763 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
765 /* Allocate or find a client reference we can use */
766 clp
= nfs_get_client(&cl_init
, &timeparms
, NULL
, RPC_AUTH_UNIX
);
768 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
772 server
->nfs_client
= clp
;
774 /* Initialise the client representation from the mount data */
775 server
->flags
= data
->flags
;
776 server
->options
= data
->options
;
777 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
778 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
779 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
|NFS_CAP_CHANGE_ATTR
;
782 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
784 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
786 server
->acregmin
= data
->acregmin
* HZ
;
787 server
->acregmax
= data
->acregmax
* HZ
;
788 server
->acdirmin
= data
->acdirmin
* HZ
;
789 server
->acdirmax
= data
->acdirmax
* HZ
;
791 /* Start lockd here, before we might error out */
792 error
= nfs_start_lockd(server
);
796 server
->port
= data
->nfs_server
.port
;
798 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
802 /* Preserve the values of mount_server-related mount options */
803 if (data
->mount_server
.addrlen
) {
804 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
805 data
->mount_server
.addrlen
);
806 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
808 server
->mountd_version
= data
->mount_server
.version
;
809 server
->mountd_port
= data
->mount_server
.port
;
810 server
->mountd_protocol
= data
->mount_server
.protocol
;
812 server
->namelen
= data
->namlen
;
813 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
817 server
->nfs_client
= NULL
;
819 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
824 * Load up the server record from information gained in an fsinfo record
826 static void nfs_server_set_fsinfo(struct nfs_server
*server
,
827 struct nfs_fh
*mntfh
,
828 struct nfs_fsinfo
*fsinfo
)
830 unsigned long max_rpc_payload
;
832 /* Work out a lot of parameters */
833 if (server
->rsize
== 0)
834 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
835 if (server
->wsize
== 0)
836 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
838 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
839 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
840 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
841 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
843 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
844 if (server
->rsize
> max_rpc_payload
)
845 server
->rsize
= max_rpc_payload
;
846 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
847 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
848 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
850 server
->backing_dev_info
.name
= "nfs";
851 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
853 if (server
->wsize
> max_rpc_payload
)
854 server
->wsize
= max_rpc_payload
;
855 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
856 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
857 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
858 server
->pnfs_blksize
= fsinfo
->blksize
;
860 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
862 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
863 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
864 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
865 if (server
->dtsize
> server
->rsize
)
866 server
->dtsize
= server
->rsize
;
868 if (server
->flags
& NFS_MOUNT_NOAC
) {
869 server
->acregmin
= server
->acregmax
= 0;
870 server
->acdirmin
= server
->acdirmax
= 0;
873 server
->maxfilesize
= fsinfo
->maxfilesize
;
875 server
->time_delta
= fsinfo
->time_delta
;
877 /* We're airborne Set socket buffersize */
878 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
882 * Probe filesystem information, including the FSID on v2/v3
884 int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
886 struct nfs_fsinfo fsinfo
;
887 struct nfs_client
*clp
= server
->nfs_client
;
890 dprintk("--> nfs_probe_fsinfo()\n");
892 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
893 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
898 fsinfo
.fattr
= fattr
;
899 fsinfo
.layouttype
= 0;
900 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
904 nfs_server_set_fsinfo(server
, mntfh
, &fsinfo
);
906 /* Get some general file system info */
907 if (server
->namelen
== 0) {
908 struct nfs_pathconf pathinfo
;
910 pathinfo
.fattr
= fattr
;
911 nfs_fattr_init(fattr
);
913 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
914 server
->namelen
= pathinfo
.max_namelen
;
917 dprintk("<-- nfs_probe_fsinfo() = 0\n");
921 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
924 EXPORT_SYMBOL_GPL(nfs_probe_fsinfo
);
927 * Copy useful information when duplicating a server record
929 void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
931 target
->flags
= source
->flags
;
932 target
->rsize
= source
->rsize
;
933 target
->wsize
= source
->wsize
;
934 target
->acregmin
= source
->acregmin
;
935 target
->acregmax
= source
->acregmax
;
936 target
->acdirmin
= source
->acdirmin
;
937 target
->acdirmax
= source
->acdirmax
;
938 target
->caps
= source
->caps
;
939 target
->options
= source
->options
;
941 EXPORT_SYMBOL_GPL(nfs_server_copy_userdata
);
943 void nfs_server_insert_lists(struct nfs_server
*server
)
945 struct nfs_client
*clp
= server
->nfs_client
;
946 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
948 spin_lock(&nn
->nfs_client_lock
);
949 list_add_tail_rcu(&server
->client_link
, &clp
->cl_superblocks
);
950 list_add_tail(&server
->master_link
, &nn
->nfs_volume_list
);
951 clear_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
952 spin_unlock(&nn
->nfs_client_lock
);
955 EXPORT_SYMBOL_GPL(nfs_server_insert_lists
);
957 static void nfs_server_remove_lists(struct nfs_server
*server
)
959 struct nfs_client
*clp
= server
->nfs_client
;
964 nn
= net_generic(clp
->cl_net
, nfs_net_id
);
965 spin_lock(&nn
->nfs_client_lock
);
966 list_del_rcu(&server
->client_link
);
967 if (list_empty(&clp
->cl_superblocks
))
968 set_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
969 list_del(&server
->master_link
);
970 spin_unlock(&nn
->nfs_client_lock
);
976 * Allocate and initialise a server record
978 struct nfs_server
*nfs_alloc_server(void)
980 struct nfs_server
*server
;
982 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
986 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
988 /* Zero out the NFS state stuff */
989 INIT_LIST_HEAD(&server
->client_link
);
990 INIT_LIST_HEAD(&server
->master_link
);
991 INIT_LIST_HEAD(&server
->delegations
);
992 INIT_LIST_HEAD(&server
->layouts
);
993 INIT_LIST_HEAD(&server
->state_owners_lru
);
995 atomic_set(&server
->active
, 0);
997 server
->io_stats
= nfs_alloc_iostats();
998 if (!server
->io_stats
) {
1003 if (bdi_init(&server
->backing_dev_info
)) {
1004 nfs_free_iostats(server
->io_stats
);
1009 ida_init(&server
->openowner_id
);
1010 ida_init(&server
->lockowner_id
);
1011 pnfs_init_server(server
);
1015 EXPORT_SYMBOL_GPL(nfs_alloc_server
);
1018 * Free up a server record
1020 void nfs_free_server(struct nfs_server
*server
)
1022 dprintk("--> nfs_free_server()\n");
1024 nfs_server_remove_lists(server
);
1026 if (server
->destroy
!= NULL
)
1027 server
->destroy(server
);
1029 if (!IS_ERR(server
->client_acl
))
1030 rpc_shutdown_client(server
->client_acl
);
1031 if (!IS_ERR(server
->client
))
1032 rpc_shutdown_client(server
->client
);
1034 nfs_put_client(server
->nfs_client
);
1036 ida_destroy(&server
->lockowner_id
);
1037 ida_destroy(&server
->openowner_id
);
1038 nfs_free_iostats(server
->io_stats
);
1039 bdi_destroy(&server
->backing_dev_info
);
1041 nfs_release_automount_timer();
1042 dprintk("<-- nfs_free_server()\n");
1044 EXPORT_SYMBOL_GPL(nfs_free_server
);
1047 * Create a version 2 or 3 volume record
1048 * - keyed on server and FSID
1050 struct nfs_server
*nfs_create_server(struct nfs_mount_info
*mount_info
,
1051 struct nfs_subversion
*nfs_mod
)
1053 struct nfs_server
*server
;
1054 struct nfs_fattr
*fattr
;
1057 server
= nfs_alloc_server();
1059 return ERR_PTR(-ENOMEM
);
1062 fattr
= nfs_alloc_fattr();
1066 /* Get a client representation */
1067 error
= nfs_init_server(server
, mount_info
->parsed
, nfs_mod
);
1071 BUG_ON(!server
->nfs_client
);
1072 BUG_ON(!server
->nfs_client
->rpc_ops
);
1073 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1075 /* Probe the root fh to retrieve its FSID */
1076 error
= nfs_probe_fsinfo(server
, mount_info
->mntfh
, fattr
);
1079 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1080 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1081 server
->namelen
= NFS3_MAXNAMLEN
;
1082 if (!(mount_info
->parsed
->flags
& NFS_MOUNT_NORDIRPLUS
))
1083 server
->caps
|= NFS_CAP_READDIRPLUS
;
1085 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1086 server
->namelen
= NFS2_MAXNAMLEN
;
1089 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1090 error
= nfs_mod
->rpc_ops
->getattr(server
, mount_info
->mntfh
, fattr
);
1092 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1096 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1098 dprintk("Server FSID: %llx:%llx\n",
1099 (unsigned long long) server
->fsid
.major
,
1100 (unsigned long long) server
->fsid
.minor
);
1102 nfs_server_insert_lists(server
);
1103 server
->mount_time
= jiffies
;
1104 nfs_free_fattr(fattr
);
1108 nfs_free_fattr(fattr
);
1109 nfs_free_server(server
);
1110 return ERR_PTR(error
);
1112 EXPORT_SYMBOL_GPL(nfs_create_server
);
1115 * Clone an NFS2, NFS3 or NFS4 server record
1117 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1119 struct nfs_fattr
*fattr
,
1120 rpc_authflavor_t flavor
)
1122 struct nfs_server
*server
;
1123 struct nfs_fattr
*fattr_fsinfo
;
1126 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1127 (unsigned long long) fattr
->fsid
.major
,
1128 (unsigned long long) fattr
->fsid
.minor
);
1130 server
= nfs_alloc_server();
1132 return ERR_PTR(-ENOMEM
);
1135 fattr_fsinfo
= nfs_alloc_fattr();
1136 if (fattr_fsinfo
== NULL
)
1137 goto out_free_server
;
1139 /* Copy data from the source */
1140 server
->nfs_client
= source
->nfs_client
;
1141 server
->destroy
= source
->destroy
;
1142 atomic_inc(&server
->nfs_client
->cl_count
);
1143 nfs_server_copy_userdata(server
, source
);
1145 server
->fsid
= fattr
->fsid
;
1147 error
= nfs_init_server_rpcclient(server
,
1148 source
->client
->cl_timeout
,
1151 goto out_free_server
;
1153 /* probe the filesystem info for this server filesystem */
1154 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1156 goto out_free_server
;
1158 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1159 server
->namelen
= NFS4_MAXNAMLEN
;
1161 dprintk("Cloned FSID: %llx:%llx\n",
1162 (unsigned long long) server
->fsid
.major
,
1163 (unsigned long long) server
->fsid
.minor
);
1165 error
= nfs_start_lockd(server
);
1167 goto out_free_server
;
1169 nfs_server_insert_lists(server
);
1170 server
->mount_time
= jiffies
;
1172 nfs_free_fattr(fattr_fsinfo
);
1173 dprintk("<-- nfs_clone_server() = %p\n", server
);
1177 nfs_free_fattr(fattr_fsinfo
);
1178 nfs_free_server(server
);
1179 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1180 return ERR_PTR(error
);
1182 EXPORT_SYMBOL_GPL(nfs_clone_server
);
1184 void nfs_clients_init(struct net
*net
)
1186 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1188 INIT_LIST_HEAD(&nn
->nfs_client_list
);
1189 INIT_LIST_HEAD(&nn
->nfs_volume_list
);
1190 #if IS_ENABLED(CONFIG_NFS_V4)
1191 idr_init(&nn
->cb_ident_idr
);
1193 spin_lock_init(&nn
->nfs_client_lock
);
1194 nn
->boot_time
= CURRENT_TIME
;
1197 #ifdef CONFIG_PROC_FS
1198 static struct proc_dir_entry
*proc_fs_nfs
;
1200 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1201 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1202 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1203 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1204 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1206 static const struct seq_operations nfs_server_list_ops
= {
1207 .start
= nfs_server_list_start
,
1208 .next
= nfs_server_list_next
,
1209 .stop
= nfs_server_list_stop
,
1210 .show
= nfs_server_list_show
,
1213 static const struct file_operations nfs_server_list_fops
= {
1214 .open
= nfs_server_list_open
,
1216 .llseek
= seq_lseek
,
1217 .release
= seq_release
,
1218 .owner
= THIS_MODULE
,
1221 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1222 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1223 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1224 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1225 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1227 static const struct seq_operations nfs_volume_list_ops
= {
1228 .start
= nfs_volume_list_start
,
1229 .next
= nfs_volume_list_next
,
1230 .stop
= nfs_volume_list_stop
,
1231 .show
= nfs_volume_list_show
,
1234 static const struct file_operations nfs_volume_list_fops
= {
1235 .open
= nfs_volume_list_open
,
1237 .llseek
= seq_lseek
,
1238 .release
= seq_release
,
1239 .owner
= THIS_MODULE
,
1243 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1246 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1250 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1251 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1253 ret
= seq_open(file
, &nfs_server_list_ops
);
1257 m
= file
->private_data
;
1264 * set up the iterator to start reading from the server list and return the first item
1266 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1268 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1270 /* lock the list against modification */
1271 spin_lock(&nn
->nfs_client_lock
);
1272 return seq_list_start_head(&nn
->nfs_client_list
, *_pos
);
1276 * move to next server
1278 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1280 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1282 return seq_list_next(v
, &nn
->nfs_client_list
, pos
);
1286 * clean up after reading from the transports list
1288 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1290 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1292 spin_unlock(&nn
->nfs_client_lock
);
1296 * display a header line followed by a load of call lines
1298 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1300 struct nfs_client
*clp
;
1301 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1303 /* display header on line 1 */
1304 if (v
== &nn
->nfs_client_list
) {
1305 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1309 /* display one transport per line on subsequent lines */
1310 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1312 /* Check if the client is initialized */
1313 if (clp
->cl_cons_state
!= NFS_CS_READY
)
1317 seq_printf(m
, "v%u %s %s %3d %s\n",
1318 clp
->rpc_ops
->version
,
1319 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1320 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1321 atomic_read(&clp
->cl_count
),
1329 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1331 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1335 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1336 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1338 ret
= seq_open(file
, &nfs_volume_list_ops
);
1342 m
= file
->private_data
;
1349 * set up the iterator to start reading from the volume list and return the first item
1351 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1353 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1355 /* lock the list against modification */
1356 spin_lock(&nn
->nfs_client_lock
);
1357 return seq_list_start_head(&nn
->nfs_volume_list
, *_pos
);
1361 * move to next volume
1363 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1365 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1367 return seq_list_next(v
, &nn
->nfs_volume_list
, pos
);
1371 * clean up after reading from the transports list
1373 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1375 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1377 spin_unlock(&nn
->nfs_client_lock
);
1381 * display a header line followed by a load of call lines
1383 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1385 struct nfs_server
*server
;
1386 struct nfs_client
*clp
;
1387 char dev
[8], fsid
[17];
1388 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1390 /* display header on line 1 */
1391 if (v
== &nn
->nfs_volume_list
) {
1392 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1395 /* display one transport per line on subsequent lines */
1396 server
= list_entry(v
, struct nfs_server
, master_link
);
1397 clp
= server
->nfs_client
;
1399 snprintf(dev
, 8, "%u:%u",
1400 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1402 snprintf(fsid
, 17, "%llx:%llx",
1403 (unsigned long long) server
->fsid
.major
,
1404 (unsigned long long) server
->fsid
.minor
);
1407 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1408 clp
->rpc_ops
->version
,
1409 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1410 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1413 nfs_server_fscache_state(server
));
1420 * initialise the /proc/fs/nfsfs/ directory
1422 int __init
nfs_fs_proc_init(void)
1424 struct proc_dir_entry
*p
;
1426 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1430 /* a file of servers with which we're dealing */
1431 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1432 proc_fs_nfs
, &nfs_server_list_fops
);
1436 /* a file of volumes that we have mounted */
1437 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1438 proc_fs_nfs
, &nfs_volume_list_fops
);
1444 remove_proc_entry("servers", proc_fs_nfs
);
1446 remove_proc_entry("fs/nfsfs", NULL
);
1452 * clean up the /proc/fs/nfsfs/ directory
1454 void nfs_fs_proc_exit(void)
1456 remove_proc_entry("volumes", proc_fs_nfs
);
1457 remove_proc_entry("servers", proc_fs_nfs
);
1458 remove_proc_entry("fs/nfsfs", NULL
);
1461 #endif /* CONFIG_PROC_FS */