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>
39 #include <linux/nfs_xdr.h>
41 #include <asm/system.h>
45 #include "delegation.h"
50 #define NFSDBG_FACILITY NFSDBG_CLIENT
52 static DEFINE_SPINLOCK(nfs_client_lock
);
53 static LIST_HEAD(nfs_client_list
);
54 static LIST_HEAD(nfs_volume_list
);
55 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
60 static struct rpc_version
*nfs_version
[5] = {
70 struct rpc_program nfs_program
= {
72 .number
= NFS_PROGRAM
,
73 .nrvers
= ARRAY_SIZE(nfs_version
),
74 .version
= nfs_version
,
75 .stats
= &nfs_rpcstat
,
76 .pipe_dir_name
= "/nfs",
79 struct rpc_stat nfs_rpcstat
= {
80 .program
= &nfs_program
84 #ifdef CONFIG_NFS_V3_ACL
85 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
86 static struct rpc_version
* nfsacl_version
[] = {
87 [3] = &nfsacl_version3
,
90 struct rpc_program nfsacl_program
= {
92 .number
= NFS_ACL_PROGRAM
,
93 .nrvers
= ARRAY_SIZE(nfsacl_version
),
94 .version
= nfsacl_version
,
95 .stats
= &nfsacl_rpcstat
,
97 #endif /* CONFIG_NFS_V3_ACL */
99 struct nfs_client_initdata
{
100 const char *hostname
;
101 const struct sockaddr
*addr
;
103 const struct nfs_rpc_ops
*rpc_ops
;
108 * Allocate a shared client record
110 * Since these are allocated/deallocated very rarely, we don't
111 * bother putting them in a slab cache...
113 static struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
115 struct nfs_client
*clp
;
116 struct rpc_cred
*cred
;
119 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
122 clp
->rpc_ops
= cl_init
->rpc_ops
;
124 if (cl_init
->rpc_ops
->version
== 4) {
125 err
= nfs_callback_up();
128 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
131 atomic_set(&clp
->cl_count
, 1);
132 clp
->cl_cons_state
= NFS_CS_INITING
;
134 memcpy(&clp
->cl_addr
, cl_init
->addr
, cl_init
->addrlen
);
135 clp
->cl_addrlen
= cl_init
->addrlen
;
137 if (cl_init
->hostname
) {
139 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
140 if (!clp
->cl_hostname
)
144 INIT_LIST_HEAD(&clp
->cl_superblocks
);
145 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
147 clp
->cl_proto
= cl_init
->proto
;
150 INIT_LIST_HEAD(&clp
->cl_delegations
);
151 spin_lock_init(&clp
->cl_lock
);
152 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
153 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
154 clp
->cl_boot_time
= CURRENT_TIME
;
155 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
157 cred
= rpc_lookup_machine_cred();
159 clp
->cl_machine_cred
= cred
;
161 nfs_fscache_get_client_cookie(clp
);
166 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
174 static void nfs4_shutdown_client(struct nfs_client
*clp
)
177 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
178 nfs4_kill_renewd(clp
);
179 BUG_ON(!RB_EMPTY_ROOT(&clp
->cl_state_owners
));
180 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
181 nfs_idmap_delete(clp
);
183 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
188 * Destroy a shared client record
190 static void nfs_free_client(struct nfs_client
*clp
)
192 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
194 nfs4_shutdown_client(clp
);
196 nfs_fscache_release_client_cookie(clp
);
198 /* -EIO all pending I/O */
199 if (!IS_ERR(clp
->cl_rpcclient
))
200 rpc_shutdown_client(clp
->cl_rpcclient
);
202 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
205 if (clp
->cl_machine_cred
!= NULL
)
206 put_rpccred(clp
->cl_machine_cred
);
208 kfree(clp
->cl_hostname
);
211 dprintk("<-- nfs_free_client()\n");
215 * Release a reference to a shared client record
217 void nfs_put_client(struct nfs_client
*clp
)
222 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
224 if (atomic_dec_and_lock(&clp
->cl_count
, &nfs_client_lock
)) {
225 list_del(&clp
->cl_share_link
);
226 spin_unlock(&nfs_client_lock
);
228 BUG_ON(!list_empty(&clp
->cl_superblocks
));
230 nfs_free_client(clp
);
234 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
236 * Test if two ip6 socket addresses refer to the same socket by
237 * comparing relevant fields. The padding bytes specifically, are not
238 * compared. sin6_flowinfo is not compared because it only affects QoS
239 * and sin6_scope_id is only compared if the address is "link local"
240 * because "link local" addresses need only be unique to a specific
241 * link. Conversely, ordinary unicast addresses might have different
244 * The caller should ensure both socket addresses are AF_INET6.
246 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
247 const struct sockaddr
*sa2
)
249 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
250 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
252 if (ipv6_addr_scope(&sin1
->sin6_addr
) == IPV6_ADDR_SCOPE_LINKLOCAL
&&
253 sin1
->sin6_scope_id
!= sin2
->sin6_scope_id
)
256 return ipv6_addr_equal(&sin1
->sin6_addr
, &sin1
->sin6_addr
);
258 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
259 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
260 const struct sockaddr
*sa2
)
267 * Test if two ip4 socket addresses refer to the same socket, by
268 * comparing relevant fields. The padding bytes specifically, are
271 * The caller should ensure both socket addresses are AF_INET.
273 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
274 const struct sockaddr
*sa2
)
276 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
277 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
279 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
282 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
283 const struct sockaddr
*sa2
)
285 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
286 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
288 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
289 (sin1
->sin6_port
== sin2
->sin6_port
);
292 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
293 const struct sockaddr
*sa2
)
295 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
296 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
298 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
299 (sin1
->sin_port
== sin2
->sin_port
);
303 * Test if two socket addresses represent the same actual socket,
304 * by comparing (only) relevant fields, excluding the port number.
306 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
307 const struct sockaddr
*sa2
)
309 if (sa1
->sa_family
!= sa2
->sa_family
)
312 switch (sa1
->sa_family
) {
314 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
316 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
322 * Test if two socket addresses represent the same actual socket,
323 * by comparing (only) relevant fields, including the port number.
325 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
326 const struct sockaddr
*sa2
)
328 if (sa1
->sa_family
!= sa2
->sa_family
)
331 switch (sa1
->sa_family
) {
333 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
335 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
341 * Find a client by IP address and protocol version
342 * - returns NULL if no such client
344 struct nfs_client
*nfs_find_client(const struct sockaddr
*addr
, u32 nfsversion
)
346 struct nfs_client
*clp
;
348 spin_lock(&nfs_client_lock
);
349 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
350 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
352 /* Don't match clients that failed to initialise properly */
353 if (clp
->cl_cons_state
!= NFS_CS_READY
)
356 /* Different NFS versions cannot share the same nfs_client */
357 if (clp
->rpc_ops
->version
!= nfsversion
)
360 /* Match only the IP address, not the port number */
361 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
364 atomic_inc(&clp
->cl_count
);
365 spin_unlock(&nfs_client_lock
);
368 spin_unlock(&nfs_client_lock
);
373 * Find a client by IP address and protocol version
374 * - returns NULL if no such client
376 struct nfs_client
*nfs_find_client_next(struct nfs_client
*clp
)
378 struct sockaddr
*sap
= (struct sockaddr
*)&clp
->cl_addr
;
379 u32 nfsvers
= clp
->rpc_ops
->version
;
381 spin_lock(&nfs_client_lock
);
382 list_for_each_entry_continue(clp
, &nfs_client_list
, cl_share_link
) {
383 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
385 /* Don't match clients that failed to initialise properly */
386 if (clp
->cl_cons_state
!= NFS_CS_READY
)
389 /* Different NFS versions cannot share the same nfs_client */
390 if (clp
->rpc_ops
->version
!= nfsvers
)
393 /* Match only the IP address, not the port number */
394 if (!nfs_sockaddr_match_ipaddr(sap
, clap
))
397 atomic_inc(&clp
->cl_count
);
398 spin_unlock(&nfs_client_lock
);
401 spin_unlock(&nfs_client_lock
);
406 * Find an nfs_client on the list that matches the initialisation data
409 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
411 struct nfs_client
*clp
;
412 const struct sockaddr
*sap
= data
->addr
;
414 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
415 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
416 /* Don't match clients that failed to initialise properly */
417 if (clp
->cl_cons_state
< 0)
420 /* Different NFS versions cannot share the same nfs_client */
421 if (clp
->rpc_ops
!= data
->rpc_ops
)
424 if (clp
->cl_proto
!= data
->proto
)
427 /* Match the full socket address */
428 if (!nfs_sockaddr_cmp(sap
, clap
))
431 atomic_inc(&clp
->cl_count
);
438 * Look up a client by IP address and protocol version
439 * - creates a new record if one doesn't yet exist
441 static struct nfs_client
*nfs_get_client(const struct nfs_client_initdata
*cl_init
)
443 struct nfs_client
*clp
, *new = NULL
;
446 dprintk("--> nfs_get_client(%s,v%u)\n",
447 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
449 /* see if the client already exists */
451 spin_lock(&nfs_client_lock
);
453 clp
= nfs_match_client(cl_init
);
459 spin_unlock(&nfs_client_lock
);
461 new = nfs_alloc_client(cl_init
);
462 } while (!IS_ERR(new));
464 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
467 /* install a new client and return with it unready */
470 list_add(&clp
->cl_share_link
, &nfs_client_list
);
471 spin_unlock(&nfs_client_lock
);
472 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
475 /* found an existing client
476 * - make sure it's ready before returning
479 spin_unlock(&nfs_client_lock
);
482 nfs_free_client(new);
484 error
= wait_event_killable(nfs_client_active_wq
,
485 clp
->cl_cons_state
!= NFS_CS_INITING
);
488 return ERR_PTR(-ERESTARTSYS
);
491 if (clp
->cl_cons_state
< NFS_CS_READY
) {
492 error
= clp
->cl_cons_state
;
494 return ERR_PTR(error
);
497 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
499 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
504 * Mark a server as ready or failed
506 static void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
508 clp
->cl_cons_state
= state
;
509 wake_up_all(&nfs_client_active_wq
);
513 * Initialise the timeout values for a connection
515 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
516 unsigned int timeo
, unsigned int retrans
)
518 to
->to_initval
= timeo
* HZ
/ 10;
519 to
->to_retries
= retrans
;
522 case XPRT_TRANSPORT_TCP
:
523 case XPRT_TRANSPORT_RDMA
:
524 if (to
->to_retries
== 0)
525 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
526 if (to
->to_initval
== 0)
527 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
528 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
529 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
530 to
->to_increment
= to
->to_initval
;
531 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
532 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
533 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
534 if (to
->to_maxval
< to
->to_initval
)
535 to
->to_maxval
= to
->to_initval
;
536 to
->to_exponential
= 0;
538 case XPRT_TRANSPORT_UDP
:
539 if (to
->to_retries
== 0)
540 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
542 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
543 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
544 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
545 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
546 to
->to_exponential
= 1;
554 * Create an RPC client handle
556 static int nfs_create_rpc_client(struct nfs_client
*clp
,
557 const struct rpc_timeout
*timeparms
,
558 rpc_authflavor_t flavor
,
559 int discrtry
, int noresvport
)
561 struct rpc_clnt
*clnt
= NULL
;
562 struct rpc_create_args args
= {
563 .protocol
= clp
->cl_proto
,
564 .address
= (struct sockaddr
*)&clp
->cl_addr
,
565 .addrsize
= clp
->cl_addrlen
,
566 .timeout
= timeparms
,
567 .servername
= clp
->cl_hostname
,
568 .program
= &nfs_program
,
569 .version
= clp
->rpc_ops
->version
,
570 .authflavor
= flavor
,
574 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
576 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
578 if (!IS_ERR(clp
->cl_rpcclient
))
581 clnt
= rpc_create(&args
);
583 dprintk("%s: cannot create RPC client. Error = %ld\n",
584 __func__
, PTR_ERR(clnt
));
585 return PTR_ERR(clnt
);
588 clp
->cl_rpcclient
= clnt
;
593 * Version 2 or 3 client destruction
595 static void nfs_destroy_server(struct nfs_server
*server
)
597 if (!(server
->flags
& NFS_MOUNT_NONLM
))
598 nlmclnt_done(server
->nlm_host
);
602 * Version 2 or 3 lockd setup
604 static int nfs_start_lockd(struct nfs_server
*server
)
606 struct nlm_host
*host
;
607 struct nfs_client
*clp
= server
->nfs_client
;
608 struct nlmclnt_initdata nlm_init
= {
609 .hostname
= clp
->cl_hostname
,
610 .address
= (struct sockaddr
*)&clp
->cl_addr
,
611 .addrlen
= clp
->cl_addrlen
,
612 .protocol
= server
->flags
& NFS_MOUNT_TCP
?
613 IPPROTO_TCP
: IPPROTO_UDP
,
614 .nfs_version
= clp
->rpc_ops
->version
,
615 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
619 if (nlm_init
.nfs_version
> 3)
621 if (server
->flags
& NFS_MOUNT_NONLM
)
624 host
= nlmclnt_init(&nlm_init
);
626 return PTR_ERR(host
);
628 server
->nlm_host
= host
;
629 server
->destroy
= nfs_destroy_server
;
634 * Initialise an NFSv3 ACL client connection
636 #ifdef CONFIG_NFS_V3_ACL
637 static void nfs_init_server_aclclient(struct nfs_server
*server
)
639 if (server
->nfs_client
->rpc_ops
->version
!= 3)
641 if (server
->flags
& NFS_MOUNT_NOACL
)
644 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
645 if (IS_ERR(server
->client_acl
))
648 /* No errors! Assume that Sun nfsacls are supported */
649 server
->caps
|= NFS_CAP_ACLS
;
653 server
->caps
&= ~NFS_CAP_ACLS
;
656 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
658 server
->flags
&= ~NFS_MOUNT_NOACL
;
659 server
->caps
&= ~NFS_CAP_ACLS
;
664 * Create a general RPC client
666 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
667 const struct rpc_timeout
*timeo
,
668 rpc_authflavor_t pseudoflavour
)
670 struct nfs_client
*clp
= server
->nfs_client
;
672 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
673 if (IS_ERR(server
->client
)) {
674 dprintk("%s: couldn't create rpc_client!\n", __func__
);
675 return PTR_ERR(server
->client
);
678 memcpy(&server
->client
->cl_timeout_default
,
680 sizeof(server
->client
->cl_timeout_default
));
681 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
683 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
684 struct rpc_auth
*auth
;
686 auth
= rpcauth_create(pseudoflavour
, server
->client
);
688 dprintk("%s: couldn't create credcache!\n", __func__
);
689 return PTR_ERR(auth
);
692 server
->client
->cl_softrtry
= 0;
693 if (server
->flags
& NFS_MOUNT_SOFT
)
694 server
->client
->cl_softrtry
= 1;
700 * Initialise an NFS2 or NFS3 client
702 static int nfs_init_client(struct nfs_client
*clp
,
703 const struct rpc_timeout
*timeparms
,
704 const struct nfs_parsed_mount_data
*data
)
708 if (clp
->cl_cons_state
== NFS_CS_READY
) {
709 /* the client is already initialised */
710 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
715 * Create a client RPC handle for doing FSSTAT with UNIX auth only
716 * - RFC 2623, sec 2.3.2
718 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
,
719 0, data
->flags
& NFS_MOUNT_NORESVPORT
);
722 nfs_mark_client_ready(clp
, NFS_CS_READY
);
726 nfs_mark_client_ready(clp
, error
);
727 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
732 * Create a version 2 or 3 client
734 static int nfs_init_server(struct nfs_server
*server
,
735 const struct nfs_parsed_mount_data
*data
)
737 struct nfs_client_initdata cl_init
= {
738 .hostname
= data
->nfs_server
.hostname
,
739 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
740 .addrlen
= data
->nfs_server
.addrlen
,
741 .rpc_ops
= &nfs_v2_clientops
,
742 .proto
= data
->nfs_server
.protocol
,
744 struct rpc_timeout timeparms
;
745 struct nfs_client
*clp
;
748 dprintk("--> nfs_init_server()\n");
751 if (data
->flags
& NFS_MOUNT_VER3
)
752 cl_init
.rpc_ops
= &nfs_v3_clientops
;
755 /* Allocate or find a client reference we can use */
756 clp
= nfs_get_client(&cl_init
);
758 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
762 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
763 data
->timeo
, data
->retrans
);
764 error
= nfs_init_client(clp
, &timeparms
, data
);
768 server
->nfs_client
= clp
;
770 /* Initialise the client representation from the mount data */
771 server
->flags
= data
->flags
;
772 server
->options
= data
->options
;
775 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
777 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
779 server
->acregmin
= data
->acregmin
* HZ
;
780 server
->acregmax
= data
->acregmax
* HZ
;
781 server
->acdirmin
= data
->acdirmin
* HZ
;
782 server
->acdirmax
= data
->acdirmax
* HZ
;
784 /* Start lockd here, before we might error out */
785 error
= nfs_start_lockd(server
);
789 server
->port
= data
->nfs_server
.port
;
791 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
795 /* Preserve the values of mount_server-related mount options */
796 if (data
->mount_server
.addrlen
) {
797 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
798 data
->mount_server
.addrlen
);
799 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
801 server
->mountd_version
= data
->mount_server
.version
;
802 server
->mountd_port
= data
->mount_server
.port
;
803 server
->mountd_protocol
= data
->mount_server
.protocol
;
805 server
->namelen
= data
->namlen
;
806 /* Create a client RPC handle for the NFSv3 ACL management interface */
807 nfs_init_server_aclclient(server
);
808 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
812 server
->nfs_client
= NULL
;
814 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
819 * Load up the server record from information gained in an fsinfo record
821 static void nfs_server_set_fsinfo(struct nfs_server
*server
, struct nfs_fsinfo
*fsinfo
)
823 unsigned long max_rpc_payload
;
825 /* Work out a lot of parameters */
826 if (server
->rsize
== 0)
827 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
828 if (server
->wsize
== 0)
829 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
831 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
832 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
833 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
834 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
836 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
837 if (server
->rsize
> max_rpc_payload
)
838 server
->rsize
= max_rpc_payload
;
839 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
840 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
841 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
843 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
845 if (server
->wsize
> max_rpc_payload
)
846 server
->wsize
= max_rpc_payload
;
847 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
848 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
849 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
850 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
852 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
853 if (server
->dtsize
> PAGE_CACHE_SIZE
)
854 server
->dtsize
= PAGE_CACHE_SIZE
;
855 if (server
->dtsize
> server
->rsize
)
856 server
->dtsize
= server
->rsize
;
858 if (server
->flags
& NFS_MOUNT_NOAC
) {
859 server
->acregmin
= server
->acregmax
= 0;
860 server
->acdirmin
= server
->acdirmax
= 0;
863 server
->maxfilesize
= fsinfo
->maxfilesize
;
865 /* We're airborne Set socket buffersize */
866 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
870 * Probe filesystem information, including the FSID on v2/v3
872 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
874 struct nfs_fsinfo fsinfo
;
875 struct nfs_client
*clp
= server
->nfs_client
;
878 dprintk("--> nfs_probe_fsinfo()\n");
880 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
881 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
886 fsinfo
.fattr
= fattr
;
887 nfs_fattr_init(fattr
);
888 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
892 nfs_server_set_fsinfo(server
, &fsinfo
);
893 error
= bdi_init(&server
->backing_dev_info
);
898 /* Get some general file system info */
899 if (server
->namelen
== 0) {
900 struct nfs_pathconf pathinfo
;
902 pathinfo
.fattr
= fattr
;
903 nfs_fattr_init(fattr
);
905 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
906 server
->namelen
= pathinfo
.max_namelen
;
909 dprintk("<-- nfs_probe_fsinfo() = 0\n");
913 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
918 * Copy useful information when duplicating a server record
920 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
922 target
->flags
= source
->flags
;
923 target
->acregmin
= source
->acregmin
;
924 target
->acregmax
= source
->acregmax
;
925 target
->acdirmin
= source
->acdirmin
;
926 target
->acdirmax
= source
->acdirmax
;
927 target
->caps
= source
->caps
;
931 * Allocate and initialise a server record
933 static struct nfs_server
*nfs_alloc_server(void)
935 struct nfs_server
*server
;
937 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
941 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
943 /* Zero out the NFS state stuff */
944 INIT_LIST_HEAD(&server
->client_link
);
945 INIT_LIST_HEAD(&server
->master_link
);
947 atomic_set(&server
->active
, 0);
949 server
->io_stats
= nfs_alloc_iostats();
950 if (!server
->io_stats
) {
959 * Free up a server record
961 void nfs_free_server(struct nfs_server
*server
)
963 dprintk("--> nfs_free_server()\n");
965 spin_lock(&nfs_client_lock
);
966 list_del(&server
->client_link
);
967 list_del(&server
->master_link
);
968 spin_unlock(&nfs_client_lock
);
970 if (server
->destroy
!= NULL
)
971 server
->destroy(server
);
973 if (!IS_ERR(server
->client_acl
))
974 rpc_shutdown_client(server
->client_acl
);
975 if (!IS_ERR(server
->client
))
976 rpc_shutdown_client(server
->client
);
978 nfs_put_client(server
->nfs_client
);
980 nfs_free_iostats(server
->io_stats
);
981 bdi_destroy(&server
->backing_dev_info
);
983 nfs_release_automount_timer();
984 dprintk("<-- nfs_free_server()\n");
988 * Create a version 2 or 3 volume record
989 * - keyed on server and FSID
991 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
992 struct nfs_fh
*mntfh
)
994 struct nfs_server
*server
;
995 struct nfs_fattr fattr
;
998 server
= nfs_alloc_server();
1000 return ERR_PTR(-ENOMEM
);
1002 /* Get a client representation */
1003 error
= nfs_init_server(server
, data
);
1007 BUG_ON(!server
->nfs_client
);
1008 BUG_ON(!server
->nfs_client
->rpc_ops
);
1009 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1011 /* Probe the root fh to retrieve its FSID */
1012 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1015 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1016 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1017 server
->namelen
= NFS3_MAXNAMLEN
;
1018 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1019 server
->caps
|= NFS_CAP_READDIRPLUS
;
1021 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1022 server
->namelen
= NFS2_MAXNAMLEN
;
1025 if (!(fattr
.valid
& NFS_ATTR_FATTR
)) {
1026 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, &fattr
);
1028 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1032 memcpy(&server
->fsid
, &fattr
.fsid
, sizeof(server
->fsid
));
1034 dprintk("Server FSID: %llx:%llx\n",
1035 (unsigned long long) server
->fsid
.major
,
1036 (unsigned long long) server
->fsid
.minor
);
1038 BUG_ON(!server
->nfs_client
);
1039 BUG_ON(!server
->nfs_client
->rpc_ops
);
1040 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1042 spin_lock(&nfs_client_lock
);
1043 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1044 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1045 spin_unlock(&nfs_client_lock
);
1047 server
->mount_time
= jiffies
;
1051 nfs_free_server(server
);
1052 return ERR_PTR(error
);
1055 #ifdef CONFIG_NFS_V4
1057 * Initialise an NFS4 client record
1059 static int nfs4_init_client(struct nfs_client
*clp
,
1060 const struct rpc_timeout
*timeparms
,
1061 const char *ip_addr
,
1062 rpc_authflavor_t authflavour
,
1067 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1068 /* the client is initialised already */
1069 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1073 /* Check NFS protocol revision and initialize RPC op vector */
1074 clp
->rpc_ops
= &nfs_v4_clientops
;
1076 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
,
1077 1, flags
& NFS_MOUNT_NORESVPORT
);
1080 memcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1082 error
= nfs_idmap_new(clp
);
1084 dprintk("%s: failed to create idmapper. Error = %d\n",
1088 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1090 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1094 nfs_mark_client_ready(clp
, error
);
1095 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1100 * Set up an NFS4 client
1102 static int nfs4_set_client(struct nfs_server
*server
,
1103 const char *hostname
,
1104 const struct sockaddr
*addr
,
1105 const size_t addrlen
,
1106 const char *ip_addr
,
1107 rpc_authflavor_t authflavour
,
1108 int proto
, const struct rpc_timeout
*timeparms
)
1110 struct nfs_client_initdata cl_init
= {
1111 .hostname
= hostname
,
1114 .rpc_ops
= &nfs_v4_clientops
,
1117 struct nfs_client
*clp
;
1120 dprintk("--> nfs4_set_client()\n");
1122 /* Allocate or find a client reference we can use */
1123 clp
= nfs_get_client(&cl_init
);
1125 error
= PTR_ERR(clp
);
1128 error
= nfs4_init_client(clp
, timeparms
, ip_addr
, authflavour
,
1133 server
->nfs_client
= clp
;
1134 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1138 nfs_put_client(clp
);
1140 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1145 * Create a version 4 volume record
1147 static int nfs4_init_server(struct nfs_server
*server
,
1148 const struct nfs_parsed_mount_data
*data
)
1150 struct rpc_timeout timeparms
;
1153 dprintk("--> nfs4_init_server()\n");
1155 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1156 data
->timeo
, data
->retrans
);
1158 /* Initialise the client representation from the mount data */
1159 server
->flags
= data
->flags
;
1160 server
->caps
|= NFS_CAP_ATOMIC_OPEN
;
1161 server
->options
= data
->options
;
1163 /* Get a client record */
1164 error
= nfs4_set_client(server
,
1165 data
->nfs_server
.hostname
,
1166 (const struct sockaddr
*)&data
->nfs_server
.address
,
1167 data
->nfs_server
.addrlen
,
1168 data
->client_address
,
1169 data
->auth_flavors
[0],
1170 data
->nfs_server
.protocol
,
1176 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1178 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1180 server
->acregmin
= data
->acregmin
* HZ
;
1181 server
->acregmax
= data
->acregmax
* HZ
;
1182 server
->acdirmin
= data
->acdirmin
* HZ
;
1183 server
->acdirmax
= data
->acdirmax
* HZ
;
1185 server
->port
= data
->nfs_server
.port
;
1187 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1191 dprintk("<-- nfs4_init_server() = %d\n", error
);
1196 * Create a version 4 volume record
1197 * - keyed on server and FSID
1199 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1200 struct nfs_fh
*mntfh
)
1202 struct nfs_fattr fattr
;
1203 struct nfs_server
*server
;
1206 dprintk("--> nfs4_create_server()\n");
1208 server
= nfs_alloc_server();
1210 return ERR_PTR(-ENOMEM
);
1212 /* set up the general RPC client */
1213 error
= nfs4_init_server(server
, data
);
1217 BUG_ON(!server
->nfs_client
);
1218 BUG_ON(!server
->nfs_client
->rpc_ops
);
1219 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1221 /* Probe the root fh to retrieve its FSID */
1222 error
= nfs4_path_walk(server
, mntfh
, data
->nfs_server
.export_path
);
1226 dprintk("Server FSID: %llx:%llx\n",
1227 (unsigned long long) server
->fsid
.major
,
1228 (unsigned long long) server
->fsid
.minor
);
1229 dprintk("Mount FH: %d\n", mntfh
->size
);
1231 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1235 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1236 server
->namelen
= NFS4_MAXNAMLEN
;
1238 BUG_ON(!server
->nfs_client
);
1239 BUG_ON(!server
->nfs_client
->rpc_ops
);
1240 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1242 spin_lock(&nfs_client_lock
);
1243 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1244 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1245 spin_unlock(&nfs_client_lock
);
1247 server
->mount_time
= jiffies
;
1248 dprintk("<-- nfs4_create_server() = %p\n", server
);
1252 nfs_free_server(server
);
1253 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1254 return ERR_PTR(error
);
1258 * Create an NFS4 referral server record
1260 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1261 struct nfs_fh
*mntfh
)
1263 struct nfs_client
*parent_client
;
1264 struct nfs_server
*server
, *parent_server
;
1265 struct nfs_fattr fattr
;
1268 dprintk("--> nfs4_create_referral_server()\n");
1270 server
= nfs_alloc_server();
1272 return ERR_PTR(-ENOMEM
);
1274 parent_server
= NFS_SB(data
->sb
);
1275 parent_client
= parent_server
->nfs_client
;
1277 /* Initialise the client representation from the parent server */
1278 nfs_server_copy_userdata(server
, parent_server
);
1279 server
->caps
|= NFS_CAP_ATOMIC_OPEN
;
1281 /* Get a client representation.
1282 * Note: NFSv4 always uses TCP, */
1283 error
= nfs4_set_client(server
, data
->hostname
,
1286 parent_client
->cl_ipaddr
,
1288 parent_server
->client
->cl_xprt
->prot
,
1289 parent_server
->client
->cl_timeout
);
1293 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1297 BUG_ON(!server
->nfs_client
);
1298 BUG_ON(!server
->nfs_client
->rpc_ops
);
1299 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1301 /* Probe the root fh to retrieve its FSID and filehandle */
1302 error
= nfs4_path_walk(server
, mntfh
, data
->mnt_path
);
1306 /* probe the filesystem info for this server filesystem */
1307 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1311 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1312 server
->namelen
= NFS4_MAXNAMLEN
;
1314 dprintk("Referral FSID: %llx:%llx\n",
1315 (unsigned long long) server
->fsid
.major
,
1316 (unsigned long long) server
->fsid
.minor
);
1318 spin_lock(&nfs_client_lock
);
1319 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1320 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1321 spin_unlock(&nfs_client_lock
);
1323 server
->mount_time
= jiffies
;
1325 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1329 nfs_free_server(server
);
1330 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1331 return ERR_PTR(error
);
1334 #endif /* CONFIG_NFS_V4 */
1337 * Clone an NFS2, NFS3 or NFS4 server record
1339 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1341 struct nfs_fattr
*fattr
)
1343 struct nfs_server
*server
;
1344 struct nfs_fattr fattr_fsinfo
;
1347 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1348 (unsigned long long) fattr
->fsid
.major
,
1349 (unsigned long long) fattr
->fsid
.minor
);
1351 server
= nfs_alloc_server();
1353 return ERR_PTR(-ENOMEM
);
1355 /* Copy data from the source */
1356 server
->nfs_client
= source
->nfs_client
;
1357 atomic_inc(&server
->nfs_client
->cl_count
);
1358 nfs_server_copy_userdata(server
, source
);
1360 server
->fsid
= fattr
->fsid
;
1362 error
= nfs_init_server_rpcclient(server
,
1363 source
->client
->cl_timeout
,
1364 source
->client
->cl_auth
->au_flavor
);
1366 goto out_free_server
;
1367 if (!IS_ERR(source
->client_acl
))
1368 nfs_init_server_aclclient(server
);
1370 /* probe the filesystem info for this server filesystem */
1371 error
= nfs_probe_fsinfo(server
, fh
, &fattr_fsinfo
);
1373 goto out_free_server
;
1375 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1376 server
->namelen
= NFS4_MAXNAMLEN
;
1378 dprintk("Cloned FSID: %llx:%llx\n",
1379 (unsigned long long) server
->fsid
.major
,
1380 (unsigned long long) server
->fsid
.minor
);
1382 error
= nfs_start_lockd(server
);
1384 goto out_free_server
;
1386 spin_lock(&nfs_client_lock
);
1387 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1388 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1389 spin_unlock(&nfs_client_lock
);
1391 server
->mount_time
= jiffies
;
1393 dprintk("<-- nfs_clone_server() = %p\n", server
);
1397 nfs_free_server(server
);
1398 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1399 return ERR_PTR(error
);
1402 #ifdef CONFIG_PROC_FS
1403 static struct proc_dir_entry
*proc_fs_nfs
;
1405 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1406 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1407 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1408 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1409 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1411 static struct seq_operations nfs_server_list_ops
= {
1412 .start
= nfs_server_list_start
,
1413 .next
= nfs_server_list_next
,
1414 .stop
= nfs_server_list_stop
,
1415 .show
= nfs_server_list_show
,
1418 static const struct file_operations nfs_server_list_fops
= {
1419 .open
= nfs_server_list_open
,
1421 .llseek
= seq_lseek
,
1422 .release
= seq_release
,
1423 .owner
= THIS_MODULE
,
1426 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1427 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1428 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1429 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1430 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1432 static struct seq_operations nfs_volume_list_ops
= {
1433 .start
= nfs_volume_list_start
,
1434 .next
= nfs_volume_list_next
,
1435 .stop
= nfs_volume_list_stop
,
1436 .show
= nfs_volume_list_show
,
1439 static const struct file_operations nfs_volume_list_fops
= {
1440 .open
= nfs_volume_list_open
,
1442 .llseek
= seq_lseek
,
1443 .release
= seq_release
,
1444 .owner
= THIS_MODULE
,
1448 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1451 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1456 ret
= seq_open(file
, &nfs_server_list_ops
);
1460 m
= file
->private_data
;
1461 m
->private = PDE(inode
)->data
;
1467 * set up the iterator to start reading from the server list and return the first item
1469 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1471 /* lock the list against modification */
1472 spin_lock(&nfs_client_lock
);
1473 return seq_list_start_head(&nfs_client_list
, *_pos
);
1477 * move to next server
1479 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1481 return seq_list_next(v
, &nfs_client_list
, pos
);
1485 * clean up after reading from the transports list
1487 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1489 spin_unlock(&nfs_client_lock
);
1493 * display a header line followed by a load of call lines
1495 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1497 struct nfs_client
*clp
;
1499 /* display header on line 1 */
1500 if (v
== &nfs_client_list
) {
1501 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1505 /* display one transport per line on subsequent lines */
1506 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1508 seq_printf(m
, "v%u %s %s %3d %s\n",
1509 clp
->rpc_ops
->version
,
1510 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1511 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1512 atomic_read(&clp
->cl_count
),
1519 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1521 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1526 ret
= seq_open(file
, &nfs_volume_list_ops
);
1530 m
= file
->private_data
;
1531 m
->private = PDE(inode
)->data
;
1537 * set up the iterator to start reading from the volume list and return the first item
1539 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1541 /* lock the list against modification */
1542 spin_lock(&nfs_client_lock
);
1543 return seq_list_start_head(&nfs_volume_list
, *_pos
);
1547 * move to next volume
1549 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1551 return seq_list_next(v
, &nfs_volume_list
, pos
);
1555 * clean up after reading from the transports list
1557 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1559 spin_unlock(&nfs_client_lock
);
1563 * display a header line followed by a load of call lines
1565 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1567 struct nfs_server
*server
;
1568 struct nfs_client
*clp
;
1569 char dev
[8], fsid
[17];
1571 /* display header on line 1 */
1572 if (v
== &nfs_volume_list
) {
1573 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1576 /* display one transport per line on subsequent lines */
1577 server
= list_entry(v
, struct nfs_server
, master_link
);
1578 clp
= server
->nfs_client
;
1580 snprintf(dev
, 8, "%u:%u",
1581 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1583 snprintf(fsid
, 17, "%llx:%llx",
1584 (unsigned long long) server
->fsid
.major
,
1585 (unsigned long long) server
->fsid
.minor
);
1587 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1588 clp
->rpc_ops
->version
,
1589 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1590 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1593 nfs_server_fscache_state(server
));
1599 * initialise the /proc/fs/nfsfs/ directory
1601 int __init
nfs_fs_proc_init(void)
1603 struct proc_dir_entry
*p
;
1605 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1609 /* a file of servers with which we're dealing */
1610 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1611 proc_fs_nfs
, &nfs_server_list_fops
);
1615 /* a file of volumes that we have mounted */
1616 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1617 proc_fs_nfs
, &nfs_volume_list_fops
);
1623 remove_proc_entry("servers", proc_fs_nfs
);
1625 remove_proc_entry("fs/nfsfs", NULL
);
1631 * clean up the /proc/fs/nfsfs/ directory
1633 void nfs_fs_proc_exit(void)
1635 remove_proc_entry("volumes", proc_fs_nfs
);
1636 remove_proc_entry("servers", proc_fs_nfs
);
1637 remove_proc_entry("fs/nfsfs", NULL
);
1640 #endif /* CONFIG_PROC_FS */