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/vfs.h>
35 #include <linux/inet.h>
36 #include <linux/in6.h>
37 #include <linux/slab.h>
38 #include <linux/idr.h>
40 #include <linux/nfs_xdr.h>
41 #include <linux/sunrpc/bc_xprt.h>
42 #include <linux/nsproxy.h>
43 #include <linux/pid_namespace.h>
48 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_CLIENT
58 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
59 static DEFINE_SPINLOCK(nfs_version_lock
);
60 static DEFINE_MUTEX(nfs_version_mutex
);
61 static LIST_HEAD(nfs_versions
);
66 static const struct rpc_version
*nfs_version
[5] = {
72 const struct rpc_program nfs_program
= {
74 .number
= NFS_PROGRAM
,
75 .nrvers
= ARRAY_SIZE(nfs_version
),
76 .version
= nfs_version
,
77 .stats
= &nfs_rpcstat
,
78 .pipe_dir_name
= NFS_PIPE_DIRNAME
,
81 struct rpc_stat nfs_rpcstat
= {
82 .program
= &nfs_program
85 static struct nfs_subversion
*find_nfs_version(unsigned int version
)
87 struct nfs_subversion
*nfs
;
88 spin_lock(&nfs_version_lock
);
90 list_for_each_entry(nfs
, &nfs_versions
, list
) {
91 if (nfs
->rpc_ops
->version
== version
) {
92 spin_unlock(&nfs_version_lock
);
97 spin_unlock(&nfs_version_lock
);
98 return ERR_PTR(-EPROTONOSUPPORT
);
101 struct nfs_subversion
*get_nfs_version(unsigned int version
)
103 struct nfs_subversion
*nfs
= find_nfs_version(version
);
106 mutex_lock(&nfs_version_mutex
);
107 request_module("nfsv%d", version
);
108 nfs
= find_nfs_version(version
);
109 mutex_unlock(&nfs_version_mutex
);
112 if (!IS_ERR(nfs
) && !try_module_get(nfs
->owner
))
113 return ERR_PTR(-EAGAIN
);
117 void put_nfs_version(struct nfs_subversion
*nfs
)
119 module_put(nfs
->owner
);
122 void register_nfs_version(struct nfs_subversion
*nfs
)
124 spin_lock(&nfs_version_lock
);
126 list_add(&nfs
->list
, &nfs_versions
);
127 nfs_version
[nfs
->rpc_ops
->version
] = nfs
->rpc_vers
;
129 spin_unlock(&nfs_version_lock
);
131 EXPORT_SYMBOL_GPL(register_nfs_version
);
133 void unregister_nfs_version(struct nfs_subversion
*nfs
)
135 spin_lock(&nfs_version_lock
);
137 nfs_version
[nfs
->rpc_ops
->version
] = NULL
;
138 list_del(&nfs
->list
);
140 spin_unlock(&nfs_version_lock
);
142 EXPORT_SYMBOL_GPL(unregister_nfs_version
);
145 * Allocate a shared client record
147 * Since these are allocated/deallocated very rarely, we don't
148 * bother putting them in a slab cache...
150 struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
152 struct nfs_client
*clp
;
153 struct rpc_cred
*cred
;
156 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
159 clp
->cl_nfs_mod
= cl_init
->nfs_mod
;
160 if (!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
);
198 EXPORT_SYMBOL_GPL(nfs_alloc_client
);
200 #if IS_ENABLED(CONFIG_NFS_V4)
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
);
256 kfree(clp
->cl_acceptor
);
259 dprintk("<-- nfs_free_client()\n");
261 EXPORT_SYMBOL_GPL(nfs_free_client
);
264 * Release a reference to a shared client record
266 void nfs_put_client(struct nfs_client
*clp
)
273 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
274 nn
= net_generic(clp
->cl_net
, nfs_net_id
);
276 if (atomic_dec_and_lock(&clp
->cl_count
, &nn
->nfs_client_lock
)) {
277 list_del(&clp
->cl_share_link
);
278 nfs_cb_idr_remove_locked(clp
);
279 spin_unlock(&nn
->nfs_client_lock
);
281 WARN_ON_ONCE(!list_empty(&clp
->cl_superblocks
));
283 clp
->rpc_ops
->free_client(clp
);
286 EXPORT_SYMBOL_GPL(nfs_put_client
);
288 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
290 * Test if two ip6 socket addresses refer to the same socket by
291 * comparing relevant fields. The padding bytes specifically, are not
292 * compared. sin6_flowinfo is not compared because it only affects QoS
293 * and sin6_scope_id is only compared if the address is "link local"
294 * because "link local" addresses need only be unique to a specific
295 * link. Conversely, ordinary unicast addresses might have different
298 * The caller should ensure both socket addresses are AF_INET6.
300 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
301 const struct sockaddr
*sa2
)
303 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
304 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
306 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
308 else if (ipv6_addr_type(&sin1
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
309 return sin1
->sin6_scope_id
== sin2
->sin6_scope_id
;
313 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
314 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
315 const struct sockaddr
*sa2
)
322 * Test if two ip4 socket addresses refer to the same socket, by
323 * comparing relevant fields. The padding bytes specifically, are
326 * The caller should ensure both socket addresses are AF_INET.
328 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
329 const struct sockaddr
*sa2
)
331 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
332 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
334 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
337 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
338 const struct sockaddr
*sa2
)
340 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
341 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
343 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
344 (sin1
->sin6_port
== sin2
->sin6_port
);
347 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
348 const struct sockaddr
*sa2
)
350 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
351 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
353 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
354 (sin1
->sin_port
== sin2
->sin_port
);
357 #if defined(CONFIG_NFS_V4_1)
359 * Test if two socket addresses represent the same actual socket,
360 * by comparing (only) relevant fields, excluding the port number.
362 int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
363 const struct sockaddr
*sa2
)
365 if (sa1
->sa_family
!= sa2
->sa_family
)
368 switch (sa1
->sa_family
) {
370 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
372 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
376 EXPORT_SYMBOL_GPL(nfs_sockaddr_match_ipaddr
);
377 #endif /* CONFIG_NFS_V4_1 */
380 * Test if two socket addresses represent the same actual socket,
381 * by comparing (only) relevant fields, including the port number.
383 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
384 const struct sockaddr
*sa2
)
386 if (sa1
->sa_family
!= sa2
->sa_family
)
389 switch (sa1
->sa_family
) {
391 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
393 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
399 * Find an nfs_client on the list that matches the initialisation data
402 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
404 struct nfs_client
*clp
;
405 const struct sockaddr
*sap
= data
->addr
;
406 struct nfs_net
*nn
= net_generic(data
->net
, nfs_net_id
);
408 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
409 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
410 /* Don't match clients that failed to initialise properly */
411 if (clp
->cl_cons_state
< 0)
414 /* Different NFS versions cannot share the same nfs_client */
415 if (clp
->rpc_ops
!= data
->nfs_mod
->rpc_ops
)
418 if (clp
->cl_proto
!= data
->proto
)
420 /* Match nfsv4 minorversion */
421 if (clp
->cl_minorversion
!= data
->minorversion
)
423 /* Match the full socket address */
424 if (!nfs_sockaddr_cmp(sap
, clap
))
427 atomic_inc(&clp
->cl_count
);
433 static bool nfs_client_init_is_complete(const struct nfs_client
*clp
)
435 return clp
->cl_cons_state
<= NFS_CS_READY
;
438 int nfs_wait_client_init_complete(const struct nfs_client
*clp
)
440 return wait_event_killable(nfs_client_active_wq
,
441 nfs_client_init_is_complete(clp
));
443 EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete
);
446 * Found an existing client. Make sure it's ready before returning.
448 static struct nfs_client
*
449 nfs_found_client(const struct nfs_client_initdata
*cl_init
,
450 struct nfs_client
*clp
)
454 error
= nfs_wait_client_init_complete(clp
);
457 return ERR_PTR(-ERESTARTSYS
);
460 if (clp
->cl_cons_state
< NFS_CS_READY
) {
461 error
= clp
->cl_cons_state
;
463 return ERR_PTR(error
);
468 dprintk("<-- %s found nfs_client %p for %s\n",
469 __func__
, clp
, cl_init
->hostname
?: "");
474 * Look up a client by IP address and protocol version
475 * - creates a new record if one doesn't yet exist
478 nfs_get_client(const struct nfs_client_initdata
*cl_init
,
479 const struct rpc_timeout
*timeparms
,
481 rpc_authflavor_t authflavour
)
483 struct nfs_client
*clp
, *new = NULL
;
484 struct nfs_net
*nn
= net_generic(cl_init
->net
, nfs_net_id
);
485 const struct nfs_rpc_ops
*rpc_ops
= cl_init
->nfs_mod
->rpc_ops
;
487 if (cl_init
->hostname
== NULL
) {
492 dprintk("--> nfs_get_client(%s,v%u)\n",
493 cl_init
->hostname
, rpc_ops
->version
);
495 /* see if the client already exists */
497 spin_lock(&nn
->nfs_client_lock
);
499 clp
= nfs_match_client(cl_init
);
501 spin_unlock(&nn
->nfs_client_lock
);
503 new->rpc_ops
->free_client(new);
504 return nfs_found_client(cl_init
, clp
);
507 list_add_tail(&new->cl_share_link
,
508 &nn
->nfs_client_list
);
509 spin_unlock(&nn
->nfs_client_lock
);
510 new->cl_flags
= cl_init
->init_flags
;
511 return rpc_ops
->init_client(new, timeparms
, ip_addr
);
514 spin_unlock(&nn
->nfs_client_lock
);
516 new = rpc_ops
->alloc_client(cl_init
);
517 } while (!IS_ERR(new));
519 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
520 cl_init
->hostname
, PTR_ERR(new));
523 EXPORT_SYMBOL_GPL(nfs_get_client
);
526 * Mark a server as ready or failed
528 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
531 clp
->cl_cons_state
= state
;
532 wake_up_all(&nfs_client_active_wq
);
534 EXPORT_SYMBOL_GPL(nfs_mark_client_ready
);
537 * Initialise the timeout values for a connection
539 void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
540 unsigned int timeo
, unsigned int retrans
)
542 to
->to_initval
= timeo
* HZ
/ 10;
543 to
->to_retries
= retrans
;
546 case XPRT_TRANSPORT_TCP
:
547 case XPRT_TRANSPORT_RDMA
:
548 if (to
->to_retries
== 0)
549 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
550 if (to
->to_initval
== 0)
551 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
552 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
553 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
554 to
->to_increment
= to
->to_initval
;
555 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
556 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
557 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
558 if (to
->to_maxval
< to
->to_initval
)
559 to
->to_maxval
= to
->to_initval
;
560 to
->to_exponential
= 0;
562 case XPRT_TRANSPORT_UDP
:
563 if (to
->to_retries
== 0)
564 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
566 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
567 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
568 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
569 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
570 to
->to_exponential
= 1;
576 EXPORT_SYMBOL_GPL(nfs_init_timeout_values
);
579 * Create an RPC client handle
581 int nfs_create_rpc_client(struct nfs_client
*clp
,
582 const struct rpc_timeout
*timeparms
,
583 rpc_authflavor_t flavor
)
585 struct rpc_clnt
*clnt
= NULL
;
586 struct rpc_create_args args
= {
588 .protocol
= clp
->cl_proto
,
589 .address
= (struct sockaddr
*)&clp
->cl_addr
,
590 .addrsize
= clp
->cl_addrlen
,
591 .timeout
= timeparms
,
592 .servername
= clp
->cl_hostname
,
593 .program
= &nfs_program
,
594 .version
= clp
->rpc_ops
->version
,
595 .authflavor
= flavor
,
598 if (test_bit(NFS_CS_DISCRTRY
, &clp
->cl_flags
))
599 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
600 if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT
, &clp
->cl_flags
))
601 args
.flags
|= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT
;
602 if (test_bit(NFS_CS_NORESVPORT
, &clp
->cl_flags
))
603 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
604 if (test_bit(NFS_CS_INFINITE_SLOTS
, &clp
->cl_flags
))
605 args
.flags
|= RPC_CLNT_CREATE_INFINITE_SLOTS
;
607 if (!IS_ERR(clp
->cl_rpcclient
))
610 clnt
= rpc_create(&args
);
612 dprintk("%s: cannot create RPC client. Error = %ld\n",
613 __func__
, PTR_ERR(clnt
));
614 return PTR_ERR(clnt
);
617 clp
->cl_rpcclient
= clnt
;
620 EXPORT_SYMBOL_GPL(nfs_create_rpc_client
);
623 * Version 2 or 3 client destruction
625 static void nfs_destroy_server(struct nfs_server
*server
)
627 if (server
->nlm_host
)
628 nlmclnt_done(server
->nlm_host
);
632 * Version 2 or 3 lockd setup
634 static int nfs_start_lockd(struct nfs_server
*server
)
636 struct nlm_host
*host
;
637 struct nfs_client
*clp
= server
->nfs_client
;
638 struct nlmclnt_initdata nlm_init
= {
639 .hostname
= clp
->cl_hostname
,
640 .address
= (struct sockaddr
*)&clp
->cl_addr
,
641 .addrlen
= clp
->cl_addrlen
,
642 .nfs_version
= clp
->rpc_ops
->version
,
643 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
648 if (nlm_init
.nfs_version
> 3)
650 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
651 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
654 switch (clp
->cl_proto
) {
656 nlm_init
.protocol
= IPPROTO_TCP
;
658 case XPRT_TRANSPORT_UDP
:
659 nlm_init
.protocol
= IPPROTO_UDP
;
662 host
= nlmclnt_init(&nlm_init
);
664 return PTR_ERR(host
);
666 server
->nlm_host
= host
;
667 server
->destroy
= nfs_destroy_server
;
672 * Create a general RPC client
674 int nfs_init_server_rpcclient(struct nfs_server
*server
,
675 const struct rpc_timeout
*timeo
,
676 rpc_authflavor_t pseudoflavour
)
678 struct nfs_client
*clp
= server
->nfs_client
;
680 server
->client
= rpc_clone_client_set_auth(clp
->cl_rpcclient
,
682 if (IS_ERR(server
->client
)) {
683 dprintk("%s: couldn't create rpc_client!\n", __func__
);
684 return PTR_ERR(server
->client
);
687 memcpy(&server
->client
->cl_timeout_default
,
689 sizeof(server
->client
->cl_timeout_default
));
690 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
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)
706 * Returns pointer to an NFS client, or an ERR_PTR value.
708 struct nfs_client
*nfs_init_client(struct nfs_client
*clp
,
709 const struct rpc_timeout
*timeparms
,
714 if (clp
->cl_cons_state
== NFS_CS_READY
) {
715 /* the client is already initialised */
716 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
721 * Create a client RPC handle for doing FSSTAT with UNIX auth only
722 * - RFC 2623, sec 2.3.2
724 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
);
727 nfs_mark_client_ready(clp
, NFS_CS_READY
);
731 nfs_mark_client_ready(clp
, error
);
733 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
734 return ERR_PTR(error
);
736 EXPORT_SYMBOL_GPL(nfs_init_client
);
739 * Create a version 2 or 3 client
741 static int nfs_init_server(struct nfs_server
*server
,
742 const struct nfs_parsed_mount_data
*data
,
743 struct nfs_subversion
*nfs_mod
)
745 struct nfs_client_initdata cl_init
= {
746 .hostname
= data
->nfs_server
.hostname
,
747 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
748 .addrlen
= data
->nfs_server
.addrlen
,
750 .proto
= data
->nfs_server
.protocol
,
753 struct rpc_timeout timeparms
;
754 struct nfs_client
*clp
;
757 dprintk("--> nfs_init_server()\n");
759 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
760 data
->timeo
, data
->retrans
);
761 if (data
->flags
& NFS_MOUNT_NORESVPORT
)
762 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
764 /* Allocate or find a client reference we can use */
765 clp
= nfs_get_client(&cl_init
, &timeparms
, NULL
, RPC_AUTH_UNIX
);
767 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
771 server
->nfs_client
= clp
;
773 /* Initialise the client representation from the mount data */
774 server
->flags
= data
->flags
;
775 server
->options
= data
->options
;
776 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
777 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
778 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
|NFS_CAP_CHANGE_ATTR
;
781 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
783 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
785 server
->acregmin
= data
->acregmin
* HZ
;
786 server
->acregmax
= data
->acregmax
* HZ
;
787 server
->acdirmin
= data
->acdirmin
* HZ
;
788 server
->acdirmax
= data
->acdirmax
* HZ
;
790 /* Start lockd here, before we might error out */
791 error
= nfs_start_lockd(server
);
795 server
->port
= data
->nfs_server
.port
;
796 server
->auth_info
= data
->auth_info
;
798 error
= nfs_init_server_rpcclient(server
, &timeparms
,
799 data
->selected_flavor
);
803 /* Preserve the values of mount_server-related mount options */
804 if (data
->mount_server
.addrlen
) {
805 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
806 data
->mount_server
.addrlen
);
807 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
809 server
->mountd_version
= data
->mount_server
.version
;
810 server
->mountd_port
= data
->mount_server
.port
;
811 server
->mountd_protocol
= data
->mount_server
.protocol
;
813 server
->namelen
= data
->namlen
;
814 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
818 server
->nfs_client
= NULL
;
820 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
825 * Load up the server record from information gained in an fsinfo record
827 static void nfs_server_set_fsinfo(struct nfs_server
*server
,
828 struct nfs_fh
*mntfh
,
829 struct nfs_fsinfo
*fsinfo
)
831 unsigned long max_rpc_payload
;
833 /* Work out a lot of parameters */
834 if (server
->rsize
== 0)
835 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
836 if (server
->wsize
== 0)
837 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
839 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
840 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
841 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
842 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
844 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
845 if (server
->rsize
> max_rpc_payload
)
846 server
->rsize
= max_rpc_payload
;
847 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
848 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
849 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
851 server
->backing_dev_info
.name
= "nfs";
852 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
854 if (server
->wsize
> max_rpc_payload
)
855 server
->wsize
= max_rpc_payload
;
856 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
857 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
858 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
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
;
940 target
->auth_info
= source
->auth_info
;
942 EXPORT_SYMBOL_GPL(nfs_server_copy_userdata
);
944 void nfs_server_insert_lists(struct nfs_server
*server
)
946 struct nfs_client
*clp
= server
->nfs_client
;
947 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
949 spin_lock(&nn
->nfs_client_lock
);
950 list_add_tail_rcu(&server
->client_link
, &clp
->cl_superblocks
);
951 list_add_tail(&server
->master_link
, &nn
->nfs_volume_list
);
952 clear_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
953 spin_unlock(&nn
->nfs_client_lock
);
956 EXPORT_SYMBOL_GPL(nfs_server_insert_lists
);
958 void nfs_server_remove_lists(struct nfs_server
*server
)
960 struct nfs_client
*clp
= server
->nfs_client
;
965 nn
= net_generic(clp
->cl_net
, nfs_net_id
);
966 spin_lock(&nn
->nfs_client_lock
);
967 list_del_rcu(&server
->client_link
);
968 if (list_empty(&clp
->cl_superblocks
))
969 set_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
970 list_del(&server
->master_link
);
971 spin_unlock(&nn
->nfs_client_lock
);
975 EXPORT_SYMBOL_GPL(nfs_server_remove_lists
);
978 * Allocate and initialise a server record
980 struct nfs_server
*nfs_alloc_server(void)
982 struct nfs_server
*server
;
984 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
988 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
990 /* Zero out the NFS state stuff */
991 INIT_LIST_HEAD(&server
->client_link
);
992 INIT_LIST_HEAD(&server
->master_link
);
993 INIT_LIST_HEAD(&server
->delegations
);
994 INIT_LIST_HEAD(&server
->layouts
);
995 INIT_LIST_HEAD(&server
->state_owners_lru
);
997 atomic_set(&server
->active
, 0);
999 server
->io_stats
= nfs_alloc_iostats();
1000 if (!server
->io_stats
) {
1005 if (bdi_init(&server
->backing_dev_info
)) {
1006 nfs_free_iostats(server
->io_stats
);
1011 ida_init(&server
->openowner_id
);
1012 ida_init(&server
->lockowner_id
);
1013 pnfs_init_server(server
);
1017 EXPORT_SYMBOL_GPL(nfs_alloc_server
);
1020 * Free up a server record
1022 void nfs_free_server(struct nfs_server
*server
)
1024 dprintk("--> nfs_free_server()\n");
1026 nfs_server_remove_lists(server
);
1028 if (server
->destroy
!= NULL
)
1029 server
->destroy(server
);
1031 if (!IS_ERR(server
->client_acl
))
1032 rpc_shutdown_client(server
->client_acl
);
1033 if (!IS_ERR(server
->client
))
1034 rpc_shutdown_client(server
->client
);
1036 nfs_put_client(server
->nfs_client
);
1038 ida_destroy(&server
->lockowner_id
);
1039 ida_destroy(&server
->openowner_id
);
1040 nfs_free_iostats(server
->io_stats
);
1041 bdi_destroy(&server
->backing_dev_info
);
1043 nfs_release_automount_timer();
1044 dprintk("<-- nfs_free_server()\n");
1046 EXPORT_SYMBOL_GPL(nfs_free_server
);
1049 * Create a version 2 or 3 volume record
1050 * - keyed on server and FSID
1052 struct nfs_server
*nfs_create_server(struct nfs_mount_info
*mount_info
,
1053 struct nfs_subversion
*nfs_mod
)
1055 struct nfs_server
*server
;
1056 struct nfs_fattr
*fattr
;
1059 server
= nfs_alloc_server();
1061 return ERR_PTR(-ENOMEM
);
1064 fattr
= nfs_alloc_fattr();
1068 /* Get a client representation */
1069 error
= nfs_init_server(server
, mount_info
->parsed
, nfs_mod
);
1073 /* Probe the root fh to retrieve its FSID */
1074 error
= nfs_probe_fsinfo(server
, mount_info
->mntfh
, fattr
);
1077 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1078 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1079 server
->namelen
= NFS3_MAXNAMLEN
;
1080 if (!(mount_info
->parsed
->flags
& NFS_MOUNT_NORDIRPLUS
))
1081 server
->caps
|= NFS_CAP_READDIRPLUS
;
1083 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1084 server
->namelen
= NFS2_MAXNAMLEN
;
1087 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1088 error
= nfs_mod
->rpc_ops
->getattr(server
, mount_info
->mntfh
, fattr
, NULL
);
1090 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1094 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1096 dprintk("Server FSID: %llx:%llx\n",
1097 (unsigned long long) server
->fsid
.major
,
1098 (unsigned long long) server
->fsid
.minor
);
1100 nfs_server_insert_lists(server
);
1101 server
->mount_time
= jiffies
;
1102 nfs_free_fattr(fattr
);
1106 nfs_free_fattr(fattr
);
1107 nfs_free_server(server
);
1108 return ERR_PTR(error
);
1110 EXPORT_SYMBOL_GPL(nfs_create_server
);
1113 * Clone an NFS2, NFS3 or NFS4 server record
1115 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1117 struct nfs_fattr
*fattr
,
1118 rpc_authflavor_t flavor
)
1120 struct nfs_server
*server
;
1121 struct nfs_fattr
*fattr_fsinfo
;
1124 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1125 (unsigned long long) fattr
->fsid
.major
,
1126 (unsigned long long) fattr
->fsid
.minor
);
1128 server
= nfs_alloc_server();
1130 return ERR_PTR(-ENOMEM
);
1133 fattr_fsinfo
= nfs_alloc_fattr();
1134 if (fattr_fsinfo
== NULL
)
1135 goto out_free_server
;
1137 /* Copy data from the source */
1138 server
->nfs_client
= source
->nfs_client
;
1139 server
->destroy
= source
->destroy
;
1140 atomic_inc(&server
->nfs_client
->cl_count
);
1141 nfs_server_copy_userdata(server
, source
);
1143 server
->fsid
= fattr
->fsid
;
1145 error
= nfs_init_server_rpcclient(server
,
1146 source
->client
->cl_timeout
,
1149 goto out_free_server
;
1151 /* probe the filesystem info for this server filesystem */
1152 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1154 goto out_free_server
;
1156 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1157 server
->namelen
= NFS4_MAXNAMLEN
;
1159 dprintk("Cloned FSID: %llx:%llx\n",
1160 (unsigned long long) server
->fsid
.major
,
1161 (unsigned long long) server
->fsid
.minor
);
1163 error
= nfs_start_lockd(server
);
1165 goto out_free_server
;
1167 nfs_server_insert_lists(server
);
1168 server
->mount_time
= jiffies
;
1170 nfs_free_fattr(fattr_fsinfo
);
1171 dprintk("<-- nfs_clone_server() = %p\n", server
);
1175 nfs_free_fattr(fattr_fsinfo
);
1176 nfs_free_server(server
);
1177 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1178 return ERR_PTR(error
);
1180 EXPORT_SYMBOL_GPL(nfs_clone_server
);
1182 void nfs_clients_init(struct net
*net
)
1184 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1186 INIT_LIST_HEAD(&nn
->nfs_client_list
);
1187 INIT_LIST_HEAD(&nn
->nfs_volume_list
);
1188 #if IS_ENABLED(CONFIG_NFS_V4)
1189 idr_init(&nn
->cb_ident_idr
);
1191 spin_lock_init(&nn
->nfs_client_lock
);
1192 nn
->boot_time
= CURRENT_TIME
;
1195 #ifdef CONFIG_PROC_FS
1196 static struct proc_dir_entry
*proc_fs_nfs
;
1198 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1199 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1200 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1201 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1202 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1204 static const struct seq_operations nfs_server_list_ops
= {
1205 .start
= nfs_server_list_start
,
1206 .next
= nfs_server_list_next
,
1207 .stop
= nfs_server_list_stop
,
1208 .show
= nfs_server_list_show
,
1211 static const struct file_operations nfs_server_list_fops
= {
1212 .open
= nfs_server_list_open
,
1214 .llseek
= seq_lseek
,
1215 .release
= seq_release_net
,
1216 .owner
= THIS_MODULE
,
1219 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1220 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1221 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1222 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1223 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1225 static const struct seq_operations nfs_volume_list_ops
= {
1226 .start
= nfs_volume_list_start
,
1227 .next
= nfs_volume_list_next
,
1228 .stop
= nfs_volume_list_stop
,
1229 .show
= nfs_volume_list_show
,
1232 static const struct file_operations nfs_volume_list_fops
= {
1233 .open
= nfs_volume_list_open
,
1235 .llseek
= seq_lseek
,
1236 .release
= seq_release_net
,
1237 .owner
= THIS_MODULE
,
1241 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1244 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1246 return seq_open_net(inode
, file
, &nfs_server_list_ops
,
1247 sizeof(struct seq_net_private
));
1251 * set up the iterator to start reading from the server list and return the first item
1253 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1254 __acquires(&nn
->nfs_client_lock
)
1256 struct nfs_net
*nn
= net_generic(seq_file_net(m
), nfs_net_id
);
1258 /* lock the list against modification */
1259 spin_lock(&nn
->nfs_client_lock
);
1260 return seq_list_start_head(&nn
->nfs_client_list
, *_pos
);
1264 * move to next server
1266 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1268 struct nfs_net
*nn
= net_generic(seq_file_net(p
), nfs_net_id
);
1270 return seq_list_next(v
, &nn
->nfs_client_list
, pos
);
1274 * clean up after reading from the transports list
1276 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1277 __releases(&nn
->nfs_client_lock
)
1279 struct nfs_net
*nn
= net_generic(seq_file_net(p
), nfs_net_id
);
1281 spin_unlock(&nn
->nfs_client_lock
);
1285 * display a header line followed by a load of call lines
1287 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1289 struct nfs_client
*clp
;
1290 struct nfs_net
*nn
= net_generic(seq_file_net(m
), nfs_net_id
);
1292 /* display header on line 1 */
1293 if (v
== &nn
->nfs_client_list
) {
1294 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1298 /* display one transport per line on subsequent lines */
1299 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1301 /* Check if the client is initialized */
1302 if (clp
->cl_cons_state
!= NFS_CS_READY
)
1306 seq_printf(m
, "v%u %s %s %3d %s\n",
1307 clp
->rpc_ops
->version
,
1308 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1309 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1310 atomic_read(&clp
->cl_count
),
1318 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1320 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1322 return seq_open_net(inode
, file
, &nfs_volume_list_ops
,
1323 sizeof(struct seq_net_private
));
1327 * set up the iterator to start reading from the volume list and return the first item
1329 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1330 __acquires(&nn
->nfs_client_lock
)
1332 struct nfs_net
*nn
= net_generic(seq_file_net(m
), nfs_net_id
);
1334 /* lock the list against modification */
1335 spin_lock(&nn
->nfs_client_lock
);
1336 return seq_list_start_head(&nn
->nfs_volume_list
, *_pos
);
1340 * move to next volume
1342 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1344 struct nfs_net
*nn
= net_generic(seq_file_net(p
), nfs_net_id
);
1346 return seq_list_next(v
, &nn
->nfs_volume_list
, pos
);
1350 * clean up after reading from the transports list
1352 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1353 __releases(&nn
->nfs_client_lock
)
1355 struct nfs_net
*nn
= net_generic(seq_file_net(p
), nfs_net_id
);
1357 spin_unlock(&nn
->nfs_client_lock
);
1361 * display a header line followed by a load of call lines
1363 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1365 struct nfs_server
*server
;
1366 struct nfs_client
*clp
;
1367 char dev
[8], fsid
[17];
1368 struct nfs_net
*nn
= net_generic(seq_file_net(m
), nfs_net_id
);
1370 /* display header on line 1 */
1371 if (v
== &nn
->nfs_volume_list
) {
1372 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1375 /* display one transport per line on subsequent lines */
1376 server
= list_entry(v
, struct nfs_server
, master_link
);
1377 clp
= server
->nfs_client
;
1379 snprintf(dev
, 8, "%u:%u",
1380 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1382 snprintf(fsid
, 17, "%llx:%llx",
1383 (unsigned long long) server
->fsid
.major
,
1384 (unsigned long long) server
->fsid
.minor
);
1387 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1388 clp
->rpc_ops
->version
,
1389 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1390 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1393 nfs_server_fscache_state(server
));
1399 int nfs_fs_proc_net_init(struct net
*net
)
1401 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1402 struct proc_dir_entry
*p
;
1404 nn
->proc_nfsfs
= proc_net_mkdir(net
, "nfsfs", net
->proc_net
);
1405 if (!nn
->proc_nfsfs
)
1408 /* a file of servers with which we're dealing */
1409 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1410 nn
->proc_nfsfs
, &nfs_server_list_fops
);
1414 /* a file of volumes that we have mounted */
1415 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1416 nn
->proc_nfsfs
, &nfs_volume_list_fops
);
1422 remove_proc_subtree("nfsfs", net
->proc_net
);
1427 void nfs_fs_proc_net_exit(struct net
*net
)
1429 remove_proc_subtree("nfsfs", net
->proc_net
);
1433 * initialise the /proc/fs/nfsfs/ directory
1435 int __init
nfs_fs_proc_init(void)
1437 struct proc_dir_entry
*p
;
1439 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1443 /* a file of servers with which we're dealing */
1444 p
= proc_symlink("servers", proc_fs_nfs
, "../../net/nfsfs/servers");
1448 /* a file of volumes that we have mounted */
1449 p
= proc_symlink("volumes", proc_fs_nfs
, "../../net/nfsfs/volumes");
1455 remove_proc_entry("servers", proc_fs_nfs
);
1457 remove_proc_entry("fs/nfsfs", NULL
);
1463 * clean up the /proc/fs/nfsfs/ directory
1465 void nfs_fs_proc_exit(void)
1467 remove_proc_entry("volumes", proc_fs_nfs
);
1468 remove_proc_entry("servers", proc_fs_nfs
);
1469 remove_proc_entry("fs/nfsfs", NULL
);
1472 #endif /* CONFIG_PROC_FS */