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>
40 #include <linux/sunrpc/bc_xprt.h>
42 #include <asm/system.h>
46 #include "delegation.h"
51 #define NFSDBG_FACILITY NFSDBG_CLIENT
53 static DEFINE_SPINLOCK(nfs_client_lock
);
54 static LIST_HEAD(nfs_client_list
);
55 static LIST_HEAD(nfs_volume_list
);
56 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
61 static struct rpc_version
*nfs_version
[5] = {
71 struct rpc_program nfs_program
= {
73 .number
= NFS_PROGRAM
,
74 .nrvers
= ARRAY_SIZE(nfs_version
),
75 .version
= nfs_version
,
76 .stats
= &nfs_rpcstat
,
77 .pipe_dir_name
= "/nfs",
80 struct rpc_stat nfs_rpcstat
= {
81 .program
= &nfs_program
85 #ifdef CONFIG_NFS_V3_ACL
86 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
87 static struct rpc_version
* nfsacl_version
[] = {
88 [3] = &nfsacl_version3
,
91 struct rpc_program nfsacl_program
= {
93 .number
= NFS_ACL_PROGRAM
,
94 .nrvers
= ARRAY_SIZE(nfsacl_version
),
95 .version
= nfsacl_version
,
96 .stats
= &nfsacl_rpcstat
,
98 #endif /* CONFIG_NFS_V3_ACL */
100 struct nfs_client_initdata
{
101 const char *hostname
;
102 const struct sockaddr
*addr
;
104 const struct nfs_rpc_ops
*rpc_ops
;
110 * Allocate a shared client record
112 * Since these are allocated/deallocated very rarely, we don't
113 * bother putting them in a slab cache...
115 static struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
117 struct nfs_client
*clp
;
118 struct rpc_cred
*cred
;
121 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
124 clp
->rpc_ops
= cl_init
->rpc_ops
;
126 atomic_set(&clp
->cl_count
, 1);
127 clp
->cl_cons_state
= NFS_CS_INITING
;
129 memcpy(&clp
->cl_addr
, cl_init
->addr
, cl_init
->addrlen
);
130 clp
->cl_addrlen
= cl_init
->addrlen
;
132 if (cl_init
->hostname
) {
134 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
135 if (!clp
->cl_hostname
)
139 INIT_LIST_HEAD(&clp
->cl_superblocks
);
140 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
142 clp
->cl_proto
= cl_init
->proto
;
145 INIT_LIST_HEAD(&clp
->cl_delegations
);
146 spin_lock_init(&clp
->cl_lock
);
147 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
148 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
149 clp
->cl_boot_time
= CURRENT_TIME
;
150 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
151 clp
->cl_minorversion
= cl_init
->minorversion
;
153 cred
= rpc_lookup_machine_cred();
155 clp
->cl_machine_cred
= cred
;
157 nfs_fscache_get_client_cookie(clp
);
167 static void nfs4_shutdown_client(struct nfs_client
*clp
)
170 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
171 nfs4_kill_renewd(clp
);
172 BUG_ON(!RB_EMPTY_ROOT(&clp
->cl_state_owners
));
173 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
174 nfs_idmap_delete(clp
);
176 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
181 * Destroy the NFS4 callback service
183 static void nfs4_destroy_callback(struct nfs_client
*clp
)
186 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
187 nfs_callback_down(clp
->cl_minorversion
);
188 #endif /* CONFIG_NFS_V4 */
192 * Clears/puts all minor version specific parts from an nfs_client struct
193 * reverting it to minorversion 0.
195 static void nfs4_clear_client_minor_version(struct nfs_client
*clp
)
197 #ifdef CONFIG_NFS_V4_1
198 if (nfs4_has_session(clp
)) {
199 nfs4_destroy_session(clp
->cl_session
);
200 clp
->cl_session
= NULL
;
203 clp
->cl_call_sync
= _nfs4_call_sync
;
204 #endif /* CONFIG_NFS_V4_1 */
206 nfs4_destroy_callback(clp
);
210 * Destroy a shared client record
212 static void nfs_free_client(struct nfs_client
*clp
)
214 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
216 nfs4_clear_client_minor_version(clp
);
217 nfs4_shutdown_client(clp
);
219 nfs_fscache_release_client_cookie(clp
);
221 /* -EIO all pending I/O */
222 if (!IS_ERR(clp
->cl_rpcclient
))
223 rpc_shutdown_client(clp
->cl_rpcclient
);
225 if (clp
->cl_machine_cred
!= NULL
)
226 put_rpccred(clp
->cl_machine_cred
);
228 kfree(clp
->cl_hostname
);
231 dprintk("<-- nfs_free_client()\n");
235 * Release a reference to a shared client record
237 void nfs_put_client(struct nfs_client
*clp
)
242 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
244 if (atomic_dec_and_lock(&clp
->cl_count
, &nfs_client_lock
)) {
245 list_del(&clp
->cl_share_link
);
246 spin_unlock(&nfs_client_lock
);
248 BUG_ON(!list_empty(&clp
->cl_superblocks
));
250 nfs_free_client(clp
);
254 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
256 * Test if two ip6 socket addresses refer to the same socket by
257 * comparing relevant fields. The padding bytes specifically, are not
258 * compared. sin6_flowinfo is not compared because it only affects QoS
259 * and sin6_scope_id is only compared if the address is "link local"
260 * because "link local" addresses need only be unique to a specific
261 * link. Conversely, ordinary unicast addresses might have different
264 * The caller should ensure both socket addresses are AF_INET6.
266 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
267 const struct sockaddr
*sa2
)
269 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
270 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
272 if (ipv6_addr_scope(&sin1
->sin6_addr
) == IPV6_ADDR_SCOPE_LINKLOCAL
&&
273 sin1
->sin6_scope_id
!= sin2
->sin6_scope_id
)
276 return ipv6_addr_equal(&sin1
->sin6_addr
, &sin1
->sin6_addr
);
278 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
279 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
280 const struct sockaddr
*sa2
)
287 * Test if two ip4 socket addresses refer to the same socket, by
288 * comparing relevant fields. The padding bytes specifically, are
291 * The caller should ensure both socket addresses are AF_INET.
293 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
294 const struct sockaddr
*sa2
)
296 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
297 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
299 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
302 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
303 const struct sockaddr
*sa2
)
305 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
306 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
308 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
309 (sin1
->sin6_port
== sin2
->sin6_port
);
312 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
313 const struct sockaddr
*sa2
)
315 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
316 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
318 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
319 (sin1
->sin_port
== sin2
->sin_port
);
323 * Test if two socket addresses represent the same actual socket,
324 * by comparing (only) relevant fields, excluding the port number.
326 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
327 const struct sockaddr
*sa2
)
329 if (sa1
->sa_family
!= sa2
->sa_family
)
332 switch (sa1
->sa_family
) {
334 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
336 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
342 * Test if two socket addresses represent the same actual socket,
343 * by comparing (only) relevant fields, including the port number.
345 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
346 const struct sockaddr
*sa2
)
348 if (sa1
->sa_family
!= sa2
->sa_family
)
351 switch (sa1
->sa_family
) {
353 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
355 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
361 * Find a client by IP address and protocol version
362 * - returns NULL if no such client
364 struct nfs_client
*nfs_find_client(const struct sockaddr
*addr
, u32 nfsversion
)
366 struct nfs_client
*clp
;
368 spin_lock(&nfs_client_lock
);
369 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
370 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
372 /* Don't match clients that failed to initialise properly */
373 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
374 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
377 /* Different NFS versions cannot share the same nfs_client */
378 if (clp
->rpc_ops
->version
!= nfsversion
)
381 /* Match only the IP address, not the port number */
382 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
385 atomic_inc(&clp
->cl_count
);
386 spin_unlock(&nfs_client_lock
);
389 spin_unlock(&nfs_client_lock
);
394 * Find a client by IP address and protocol version
395 * - returns NULL if no such client
397 struct nfs_client
*nfs_find_client_next(struct nfs_client
*clp
)
399 struct sockaddr
*sap
= (struct sockaddr
*)&clp
->cl_addr
;
400 u32 nfsvers
= clp
->rpc_ops
->version
;
402 spin_lock(&nfs_client_lock
);
403 list_for_each_entry_continue(clp
, &nfs_client_list
, cl_share_link
) {
404 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
406 /* Don't match clients that failed to initialise properly */
407 if (clp
->cl_cons_state
!= NFS_CS_READY
)
410 /* Different NFS versions cannot share the same nfs_client */
411 if (clp
->rpc_ops
->version
!= nfsvers
)
414 /* Match only the IP address, not the port number */
415 if (!nfs_sockaddr_match_ipaddr(sap
, clap
))
418 atomic_inc(&clp
->cl_count
);
419 spin_unlock(&nfs_client_lock
);
422 spin_unlock(&nfs_client_lock
);
427 * Find an nfs_client on the list that matches the initialisation data
430 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
432 struct nfs_client
*clp
;
433 const struct sockaddr
*sap
= data
->addr
;
435 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
436 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
437 /* Don't match clients that failed to initialise properly */
438 if (clp
->cl_cons_state
< 0)
441 /* Different NFS versions cannot share the same nfs_client */
442 if (clp
->rpc_ops
!= data
->rpc_ops
)
445 if (clp
->cl_proto
!= data
->proto
)
447 /* Match nfsv4 minorversion */
448 if (clp
->cl_minorversion
!= data
->minorversion
)
450 /* Match the full socket address */
451 if (!nfs_sockaddr_cmp(sap
, clap
))
454 atomic_inc(&clp
->cl_count
);
461 * Look up a client by IP address and protocol version
462 * - creates a new record if one doesn't yet exist
464 static struct nfs_client
*nfs_get_client(const struct nfs_client_initdata
*cl_init
)
466 struct nfs_client
*clp
, *new = NULL
;
469 dprintk("--> nfs_get_client(%s,v%u)\n",
470 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
472 /* see if the client already exists */
474 spin_lock(&nfs_client_lock
);
476 clp
= nfs_match_client(cl_init
);
482 spin_unlock(&nfs_client_lock
);
484 new = nfs_alloc_client(cl_init
);
485 } while (!IS_ERR(new));
487 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
490 /* install a new client and return with it unready */
493 list_add(&clp
->cl_share_link
, &nfs_client_list
);
494 spin_unlock(&nfs_client_lock
);
495 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
498 /* found an existing client
499 * - make sure it's ready before returning
502 spin_unlock(&nfs_client_lock
);
505 nfs_free_client(new);
507 error
= wait_event_killable(nfs_client_active_wq
,
508 clp
->cl_cons_state
< NFS_CS_INITING
);
511 return ERR_PTR(-ERESTARTSYS
);
514 if (clp
->cl_cons_state
< NFS_CS_READY
) {
515 error
= clp
->cl_cons_state
;
517 return ERR_PTR(error
);
520 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
522 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
527 * Mark a server as ready or failed
529 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
);
536 * With sessions, the client is not marked ready until after a
537 * successful EXCHANGE_ID and CREATE_SESSION.
539 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
540 * other versions of NFS can be tried.
542 int nfs4_check_client_ready(struct nfs_client
*clp
)
544 if (!nfs4_has_session(clp
))
546 if (clp
->cl_cons_state
< NFS_CS_READY
)
547 return -EPROTONOSUPPORT
;
552 * Initialise the timeout values for a connection
554 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
555 unsigned int timeo
, unsigned int retrans
)
557 to
->to_initval
= timeo
* HZ
/ 10;
558 to
->to_retries
= retrans
;
561 case XPRT_TRANSPORT_TCP
:
562 case XPRT_TRANSPORT_RDMA
:
563 if (to
->to_retries
== 0)
564 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
565 if (to
->to_initval
== 0)
566 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
567 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
568 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
569 to
->to_increment
= to
->to_initval
;
570 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
571 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
572 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
573 if (to
->to_maxval
< to
->to_initval
)
574 to
->to_maxval
= to
->to_initval
;
575 to
->to_exponential
= 0;
577 case XPRT_TRANSPORT_UDP
:
578 if (to
->to_retries
== 0)
579 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
581 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
582 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
583 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
584 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
585 to
->to_exponential
= 1;
593 * Create an RPC client handle
595 static int nfs_create_rpc_client(struct nfs_client
*clp
,
596 const struct rpc_timeout
*timeparms
,
597 rpc_authflavor_t flavor
,
598 int discrtry
, int noresvport
)
600 struct rpc_clnt
*clnt
= NULL
;
601 struct rpc_create_args args
= {
602 .protocol
= clp
->cl_proto
,
603 .address
= (struct sockaddr
*)&clp
->cl_addr
,
604 .addrsize
= clp
->cl_addrlen
,
605 .timeout
= timeparms
,
606 .servername
= clp
->cl_hostname
,
607 .program
= &nfs_program
,
608 .version
= clp
->rpc_ops
->version
,
609 .authflavor
= flavor
,
613 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
615 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
617 if (!IS_ERR(clp
->cl_rpcclient
))
620 clnt
= rpc_create(&args
);
622 dprintk("%s: cannot create RPC client. Error = %ld\n",
623 __func__
, PTR_ERR(clnt
));
624 return PTR_ERR(clnt
);
627 clp
->cl_rpcclient
= clnt
;
632 * Version 2 or 3 client destruction
634 static void nfs_destroy_server(struct nfs_server
*server
)
636 if (!(server
->flags
& NFS_MOUNT_NONLM
))
637 nlmclnt_done(server
->nlm_host
);
641 * Version 2 or 3 lockd setup
643 static int nfs_start_lockd(struct nfs_server
*server
)
645 struct nlm_host
*host
;
646 struct nfs_client
*clp
= server
->nfs_client
;
647 struct nlmclnt_initdata nlm_init
= {
648 .hostname
= clp
->cl_hostname
,
649 .address
= (struct sockaddr
*)&clp
->cl_addr
,
650 .addrlen
= clp
->cl_addrlen
,
651 .protocol
= server
->flags
& NFS_MOUNT_TCP
?
652 IPPROTO_TCP
: IPPROTO_UDP
,
653 .nfs_version
= clp
->rpc_ops
->version
,
654 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
658 if (nlm_init
.nfs_version
> 3)
660 if (server
->flags
& NFS_MOUNT_NONLM
)
663 host
= nlmclnt_init(&nlm_init
);
665 return PTR_ERR(host
);
667 server
->nlm_host
= host
;
668 server
->destroy
= nfs_destroy_server
;
673 * Initialise an NFSv3 ACL client connection
675 #ifdef CONFIG_NFS_V3_ACL
676 static void nfs_init_server_aclclient(struct nfs_server
*server
)
678 if (server
->nfs_client
->rpc_ops
->version
!= 3)
680 if (server
->flags
& NFS_MOUNT_NOACL
)
683 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
684 if (IS_ERR(server
->client_acl
))
687 /* No errors! Assume that Sun nfsacls are supported */
688 server
->caps
|= NFS_CAP_ACLS
;
692 server
->caps
&= ~NFS_CAP_ACLS
;
695 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
697 server
->flags
&= ~NFS_MOUNT_NOACL
;
698 server
->caps
&= ~NFS_CAP_ACLS
;
703 * Create a general RPC client
705 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
706 const struct rpc_timeout
*timeo
,
707 rpc_authflavor_t pseudoflavour
)
709 struct nfs_client
*clp
= server
->nfs_client
;
711 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
712 if (IS_ERR(server
->client
)) {
713 dprintk("%s: couldn't create rpc_client!\n", __func__
);
714 return PTR_ERR(server
->client
);
717 memcpy(&server
->client
->cl_timeout_default
,
719 sizeof(server
->client
->cl_timeout_default
));
720 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
722 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
723 struct rpc_auth
*auth
;
725 auth
= rpcauth_create(pseudoflavour
, server
->client
);
727 dprintk("%s: couldn't create credcache!\n", __func__
);
728 return PTR_ERR(auth
);
731 server
->client
->cl_softrtry
= 0;
732 if (server
->flags
& NFS_MOUNT_SOFT
)
733 server
->client
->cl_softrtry
= 1;
739 * Initialise an NFS2 or NFS3 client
741 static int nfs_init_client(struct nfs_client
*clp
,
742 const struct rpc_timeout
*timeparms
,
743 const struct nfs_parsed_mount_data
*data
)
747 if (clp
->cl_cons_state
== NFS_CS_READY
) {
748 /* the client is already initialised */
749 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
754 * Create a client RPC handle for doing FSSTAT with UNIX auth only
755 * - RFC 2623, sec 2.3.2
757 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
,
758 0, data
->flags
& NFS_MOUNT_NORESVPORT
);
761 nfs_mark_client_ready(clp
, NFS_CS_READY
);
765 nfs_mark_client_ready(clp
, error
);
766 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
771 * Create a version 2 or 3 client
773 static int nfs_init_server(struct nfs_server
*server
,
774 const struct nfs_parsed_mount_data
*data
)
776 struct nfs_client_initdata cl_init
= {
777 .hostname
= data
->nfs_server
.hostname
,
778 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
779 .addrlen
= data
->nfs_server
.addrlen
,
780 .rpc_ops
= &nfs_v2_clientops
,
781 .proto
= data
->nfs_server
.protocol
,
783 struct rpc_timeout timeparms
;
784 struct nfs_client
*clp
;
787 dprintk("--> nfs_init_server()\n");
790 if (data
->flags
& NFS_MOUNT_VER3
)
791 cl_init
.rpc_ops
= &nfs_v3_clientops
;
794 /* Allocate or find a client reference we can use */
795 clp
= nfs_get_client(&cl_init
);
797 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
801 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
802 data
->timeo
, data
->retrans
);
803 error
= nfs_init_client(clp
, &timeparms
, data
);
807 server
->nfs_client
= clp
;
809 /* Initialise the client representation from the mount data */
810 server
->flags
= data
->flags
;
811 server
->options
= data
->options
;
812 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
813 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
814 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
;
817 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
819 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
821 server
->acregmin
= data
->acregmin
* HZ
;
822 server
->acregmax
= data
->acregmax
* HZ
;
823 server
->acdirmin
= data
->acdirmin
* HZ
;
824 server
->acdirmax
= data
->acdirmax
* HZ
;
826 /* Start lockd here, before we might error out */
827 error
= nfs_start_lockd(server
);
831 server
->port
= data
->nfs_server
.port
;
833 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
837 /* Preserve the values of mount_server-related mount options */
838 if (data
->mount_server
.addrlen
) {
839 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
840 data
->mount_server
.addrlen
);
841 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
843 server
->mountd_version
= data
->mount_server
.version
;
844 server
->mountd_port
= data
->mount_server
.port
;
845 server
->mountd_protocol
= data
->mount_server
.protocol
;
847 server
->namelen
= data
->namlen
;
848 /* Create a client RPC handle for the NFSv3 ACL management interface */
849 nfs_init_server_aclclient(server
);
850 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
854 server
->nfs_client
= NULL
;
856 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
861 * Load up the server record from information gained in an fsinfo record
863 static void nfs_server_set_fsinfo(struct nfs_server
*server
, struct nfs_fsinfo
*fsinfo
)
865 unsigned long max_rpc_payload
;
867 /* Work out a lot of parameters */
868 if (server
->rsize
== 0)
869 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
870 if (server
->wsize
== 0)
871 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
873 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
874 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
875 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
876 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
878 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
879 if (server
->rsize
> max_rpc_payload
)
880 server
->rsize
= max_rpc_payload
;
881 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
882 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
883 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
885 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
887 if (server
->wsize
> max_rpc_payload
)
888 server
->wsize
= max_rpc_payload
;
889 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
890 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
891 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
892 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
894 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
895 if (server
->dtsize
> PAGE_CACHE_SIZE
)
896 server
->dtsize
= PAGE_CACHE_SIZE
;
897 if (server
->dtsize
> server
->rsize
)
898 server
->dtsize
= server
->rsize
;
900 if (server
->flags
& NFS_MOUNT_NOAC
) {
901 server
->acregmin
= server
->acregmax
= 0;
902 server
->acdirmin
= server
->acdirmax
= 0;
905 server
->maxfilesize
= fsinfo
->maxfilesize
;
907 /* We're airborne Set socket buffersize */
908 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
912 * Probe filesystem information, including the FSID on v2/v3
914 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
916 struct nfs_fsinfo fsinfo
;
917 struct nfs_client
*clp
= server
->nfs_client
;
920 dprintk("--> nfs_probe_fsinfo()\n");
922 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
923 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
928 fsinfo
.fattr
= fattr
;
929 nfs_fattr_init(fattr
);
930 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
934 nfs_server_set_fsinfo(server
, &fsinfo
);
935 error
= bdi_init(&server
->backing_dev_info
);
940 /* Get some general file system info */
941 if (server
->namelen
== 0) {
942 struct nfs_pathconf pathinfo
;
944 pathinfo
.fattr
= fattr
;
945 nfs_fattr_init(fattr
);
947 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
948 server
->namelen
= pathinfo
.max_namelen
;
951 dprintk("<-- nfs_probe_fsinfo() = 0\n");
955 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
960 * Copy useful information when duplicating a server record
962 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
964 target
->flags
= source
->flags
;
965 target
->acregmin
= source
->acregmin
;
966 target
->acregmax
= source
->acregmax
;
967 target
->acdirmin
= source
->acdirmin
;
968 target
->acdirmax
= source
->acdirmax
;
969 target
->caps
= source
->caps
;
973 * Allocate and initialise a server record
975 static struct nfs_server
*nfs_alloc_server(void)
977 struct nfs_server
*server
;
979 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
983 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
985 /* Zero out the NFS state stuff */
986 INIT_LIST_HEAD(&server
->client_link
);
987 INIT_LIST_HEAD(&server
->master_link
);
989 atomic_set(&server
->active
, 0);
991 server
->io_stats
= nfs_alloc_iostats();
992 if (!server
->io_stats
) {
1001 * Free up a server record
1003 void nfs_free_server(struct nfs_server
*server
)
1005 dprintk("--> nfs_free_server()\n");
1007 spin_lock(&nfs_client_lock
);
1008 list_del(&server
->client_link
);
1009 list_del(&server
->master_link
);
1010 spin_unlock(&nfs_client_lock
);
1012 if (server
->destroy
!= NULL
)
1013 server
->destroy(server
);
1015 if (!IS_ERR(server
->client_acl
))
1016 rpc_shutdown_client(server
->client_acl
);
1017 if (!IS_ERR(server
->client
))
1018 rpc_shutdown_client(server
->client
);
1020 nfs_put_client(server
->nfs_client
);
1022 nfs_free_iostats(server
->io_stats
);
1023 bdi_destroy(&server
->backing_dev_info
);
1025 nfs_release_automount_timer();
1026 dprintk("<-- nfs_free_server()\n");
1030 * Create a version 2 or 3 volume record
1031 * - keyed on server and FSID
1033 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1034 struct nfs_fh
*mntfh
)
1036 struct nfs_server
*server
;
1037 struct nfs_fattr fattr
;
1040 server
= nfs_alloc_server();
1042 return ERR_PTR(-ENOMEM
);
1044 /* Get a client representation */
1045 error
= nfs_init_server(server
, data
);
1049 BUG_ON(!server
->nfs_client
);
1050 BUG_ON(!server
->nfs_client
->rpc_ops
);
1051 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1053 /* Probe the root fh to retrieve its FSID */
1054 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1057 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1058 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1059 server
->namelen
= NFS3_MAXNAMLEN
;
1060 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1061 server
->caps
|= NFS_CAP_READDIRPLUS
;
1063 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1064 server
->namelen
= NFS2_MAXNAMLEN
;
1067 if (!(fattr
.valid
& NFS_ATTR_FATTR
)) {
1068 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, &fattr
);
1070 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1074 memcpy(&server
->fsid
, &fattr
.fsid
, sizeof(server
->fsid
));
1076 dprintk("Server FSID: %llx:%llx\n",
1077 (unsigned long long) server
->fsid
.major
,
1078 (unsigned long long) server
->fsid
.minor
);
1080 BUG_ON(!server
->nfs_client
);
1081 BUG_ON(!server
->nfs_client
->rpc_ops
);
1082 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1084 spin_lock(&nfs_client_lock
);
1085 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1086 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1087 spin_unlock(&nfs_client_lock
);
1089 server
->mount_time
= jiffies
;
1093 nfs_free_server(server
);
1094 return ERR_PTR(error
);
1097 #ifdef CONFIG_NFS_V4
1099 * Initialize the NFS4 callback service
1101 static int nfs4_init_callback(struct nfs_client
*clp
)
1105 if (clp
->rpc_ops
->version
== 4) {
1106 if (nfs4_has_session(clp
)) {
1107 error
= xprt_setup_backchannel(
1108 clp
->cl_rpcclient
->cl_xprt
,
1109 NFS41_BC_MIN_CALLBACKS
);
1114 error
= nfs_callback_up(clp
->cl_minorversion
,
1115 clp
->cl_rpcclient
->cl_xprt
);
1117 dprintk("%s: failed to start callback. Error = %d\n",
1121 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
1127 * Initialize the minor version specific parts of an NFS4 client record
1129 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
1131 clp
->cl_call_sync
= _nfs4_call_sync
;
1133 #if defined(CONFIG_NFS_V4_1)
1134 if (clp
->cl_minorversion
) {
1135 struct nfs4_session
*session
= NULL
;
1137 * Create the session and mark it expired.
1138 * When a SEQUENCE operation encounters the expired session
1139 * it will do session recovery to initialize it.
1141 session
= nfs4_alloc_session(clp
);
1145 clp
->cl_session
= session
;
1146 clp
->cl_call_sync
= _nfs4_call_sync_session
;
1148 #endif /* CONFIG_NFS_V4_1 */
1150 return nfs4_init_callback(clp
);
1154 * Initialise an NFS4 client record
1156 static int nfs4_init_client(struct nfs_client
*clp
,
1157 const struct rpc_timeout
*timeparms
,
1158 const char *ip_addr
,
1159 rpc_authflavor_t authflavour
,
1164 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1165 /* the client is initialised already */
1166 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1170 /* Check NFS protocol revision and initialize RPC op vector */
1171 clp
->rpc_ops
= &nfs_v4_clientops
;
1173 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
,
1174 1, flags
& NFS_MOUNT_NORESVPORT
);
1177 memcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1179 error
= nfs_idmap_new(clp
);
1181 dprintk("%s: failed to create idmapper. Error = %d\n",
1185 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1187 error
= nfs4_init_client_minor_version(clp
);
1191 if (!nfs4_has_session(clp
))
1192 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1196 nfs_mark_client_ready(clp
, error
);
1197 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1202 * Set up an NFS4 client
1204 static int nfs4_set_client(struct nfs_server
*server
,
1205 const char *hostname
,
1206 const struct sockaddr
*addr
,
1207 const size_t addrlen
,
1208 const char *ip_addr
,
1209 rpc_authflavor_t authflavour
,
1210 int proto
, const struct rpc_timeout
*timeparms
,
1213 struct nfs_client_initdata cl_init
= {
1214 .hostname
= hostname
,
1217 .rpc_ops
= &nfs_v4_clientops
,
1219 .minorversion
= minorversion
,
1221 struct nfs_client
*clp
;
1224 dprintk("--> nfs4_set_client()\n");
1226 /* Allocate or find a client reference we can use */
1227 clp
= nfs_get_client(&cl_init
);
1229 error
= PTR_ERR(clp
);
1232 error
= nfs4_init_client(clp
, timeparms
, ip_addr
, authflavour
,
1237 server
->nfs_client
= clp
;
1238 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1242 nfs_put_client(clp
);
1244 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1250 * Session has been established, and the client marked ready.
1251 * Set the mount rsize and wsize with negotiated fore channel
1252 * attributes which will be bound checked in nfs_server_set_fsinfo.
1254 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1256 #ifdef CONFIG_NFS_V4_1
1257 if (!nfs4_has_session(server
->nfs_client
))
1259 server
->rsize
= server
->nfs_client
->cl_session
->fc_attrs
.max_resp_sz
;
1260 server
->wsize
= server
->nfs_client
->cl_session
->fc_attrs
.max_rqst_sz
;
1261 #endif /* CONFIG_NFS_V4_1 */
1265 * Create a version 4 volume record
1267 static int nfs4_init_server(struct nfs_server
*server
,
1268 const struct nfs_parsed_mount_data
*data
)
1270 struct rpc_timeout timeparms
;
1273 dprintk("--> nfs4_init_server()\n");
1275 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1276 data
->timeo
, data
->retrans
);
1278 /* Initialise the client representation from the mount data */
1279 server
->flags
= data
->flags
;
1280 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1281 server
->options
= data
->options
;
1283 /* Get a client record */
1284 error
= nfs4_set_client(server
,
1285 data
->nfs_server
.hostname
,
1286 (const struct sockaddr
*)&data
->nfs_server
.address
,
1287 data
->nfs_server
.addrlen
,
1288 data
->client_address
,
1289 data
->auth_flavors
[0],
1290 data
->nfs_server
.protocol
,
1292 data
->minorversion
);
1297 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1299 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1301 server
->acregmin
= data
->acregmin
* HZ
;
1302 server
->acregmax
= data
->acregmax
* HZ
;
1303 server
->acdirmin
= data
->acdirmin
* HZ
;
1304 server
->acdirmax
= data
->acdirmax
* HZ
;
1306 server
->port
= data
->nfs_server
.port
;
1308 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1312 dprintk("<-- nfs4_init_server() = %d\n", error
);
1317 * Create a version 4 volume record
1318 * - keyed on server and FSID
1320 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1321 struct nfs_fh
*mntfh
)
1323 struct nfs_fattr fattr
;
1324 struct nfs_server
*server
;
1327 dprintk("--> nfs4_create_server()\n");
1329 server
= nfs_alloc_server();
1331 return ERR_PTR(-ENOMEM
);
1333 /* set up the general RPC client */
1334 error
= nfs4_init_server(server
, data
);
1338 BUG_ON(!server
->nfs_client
);
1339 BUG_ON(!server
->nfs_client
->rpc_ops
);
1340 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1342 error
= nfs4_init_session(server
);
1346 /* Probe the root fh to retrieve its FSID */
1347 error
= nfs4_path_walk(server
, mntfh
, data
->nfs_server
.export_path
);
1351 dprintk("Server FSID: %llx:%llx\n",
1352 (unsigned long long) server
->fsid
.major
,
1353 (unsigned long long) server
->fsid
.minor
);
1354 dprintk("Mount FH: %d\n", mntfh
->size
);
1356 nfs4_session_set_rwsize(server
);
1358 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1362 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1363 server
->namelen
= NFS4_MAXNAMLEN
;
1365 BUG_ON(!server
->nfs_client
);
1366 BUG_ON(!server
->nfs_client
->rpc_ops
);
1367 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1369 spin_lock(&nfs_client_lock
);
1370 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1371 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1372 spin_unlock(&nfs_client_lock
);
1374 server
->mount_time
= jiffies
;
1375 dprintk("<-- nfs4_create_server() = %p\n", server
);
1379 nfs_free_server(server
);
1380 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1381 return ERR_PTR(error
);
1385 * Create an NFS4 referral server record
1387 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1388 struct nfs_fh
*mntfh
)
1390 struct nfs_client
*parent_client
;
1391 struct nfs_server
*server
, *parent_server
;
1392 struct nfs_fattr fattr
;
1395 dprintk("--> nfs4_create_referral_server()\n");
1397 server
= nfs_alloc_server();
1399 return ERR_PTR(-ENOMEM
);
1401 parent_server
= NFS_SB(data
->sb
);
1402 parent_client
= parent_server
->nfs_client
;
1404 /* Initialise the client representation from the parent server */
1405 nfs_server_copy_userdata(server
, parent_server
);
1406 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1408 /* Get a client representation.
1409 * Note: NFSv4 always uses TCP, */
1410 error
= nfs4_set_client(server
, data
->hostname
,
1413 parent_client
->cl_ipaddr
,
1415 parent_server
->client
->cl_xprt
->prot
,
1416 parent_server
->client
->cl_timeout
,
1417 parent_client
->cl_minorversion
);
1421 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1425 BUG_ON(!server
->nfs_client
);
1426 BUG_ON(!server
->nfs_client
->rpc_ops
);
1427 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1429 /* Probe the root fh to retrieve its FSID and filehandle */
1430 error
= nfs4_path_walk(server
, mntfh
, data
->mnt_path
);
1434 /* probe the filesystem info for this server filesystem */
1435 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1439 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1440 server
->namelen
= NFS4_MAXNAMLEN
;
1442 dprintk("Referral FSID: %llx:%llx\n",
1443 (unsigned long long) server
->fsid
.major
,
1444 (unsigned long long) server
->fsid
.minor
);
1446 spin_lock(&nfs_client_lock
);
1447 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1448 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1449 spin_unlock(&nfs_client_lock
);
1451 server
->mount_time
= jiffies
;
1453 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1457 nfs_free_server(server
);
1458 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1459 return ERR_PTR(error
);
1462 #endif /* CONFIG_NFS_V4 */
1465 * Clone an NFS2, NFS3 or NFS4 server record
1467 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1469 struct nfs_fattr
*fattr
)
1471 struct nfs_server
*server
;
1472 struct nfs_fattr fattr_fsinfo
;
1475 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1476 (unsigned long long) fattr
->fsid
.major
,
1477 (unsigned long long) fattr
->fsid
.minor
);
1479 server
= nfs_alloc_server();
1481 return ERR_PTR(-ENOMEM
);
1483 /* Copy data from the source */
1484 server
->nfs_client
= source
->nfs_client
;
1485 atomic_inc(&server
->nfs_client
->cl_count
);
1486 nfs_server_copy_userdata(server
, source
);
1488 server
->fsid
= fattr
->fsid
;
1490 error
= nfs_init_server_rpcclient(server
,
1491 source
->client
->cl_timeout
,
1492 source
->client
->cl_auth
->au_flavor
);
1494 goto out_free_server
;
1495 if (!IS_ERR(source
->client_acl
))
1496 nfs_init_server_aclclient(server
);
1498 /* probe the filesystem info for this server filesystem */
1499 error
= nfs_probe_fsinfo(server
, fh
, &fattr_fsinfo
);
1501 goto out_free_server
;
1503 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1504 server
->namelen
= NFS4_MAXNAMLEN
;
1506 dprintk("Cloned FSID: %llx:%llx\n",
1507 (unsigned long long) server
->fsid
.major
,
1508 (unsigned long long) server
->fsid
.minor
);
1510 error
= nfs_start_lockd(server
);
1512 goto out_free_server
;
1514 spin_lock(&nfs_client_lock
);
1515 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1516 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1517 spin_unlock(&nfs_client_lock
);
1519 server
->mount_time
= jiffies
;
1521 dprintk("<-- nfs_clone_server() = %p\n", server
);
1525 nfs_free_server(server
);
1526 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1527 return ERR_PTR(error
);
1530 #ifdef CONFIG_PROC_FS
1531 static struct proc_dir_entry
*proc_fs_nfs
;
1533 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1534 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1535 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1536 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1537 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1539 static struct seq_operations nfs_server_list_ops
= {
1540 .start
= nfs_server_list_start
,
1541 .next
= nfs_server_list_next
,
1542 .stop
= nfs_server_list_stop
,
1543 .show
= nfs_server_list_show
,
1546 static const struct file_operations nfs_server_list_fops
= {
1547 .open
= nfs_server_list_open
,
1549 .llseek
= seq_lseek
,
1550 .release
= seq_release
,
1551 .owner
= THIS_MODULE
,
1554 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1555 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1556 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1557 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1558 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1560 static struct seq_operations nfs_volume_list_ops
= {
1561 .start
= nfs_volume_list_start
,
1562 .next
= nfs_volume_list_next
,
1563 .stop
= nfs_volume_list_stop
,
1564 .show
= nfs_volume_list_show
,
1567 static const struct file_operations nfs_volume_list_fops
= {
1568 .open
= nfs_volume_list_open
,
1570 .llseek
= seq_lseek
,
1571 .release
= seq_release
,
1572 .owner
= THIS_MODULE
,
1576 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1579 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1584 ret
= seq_open(file
, &nfs_server_list_ops
);
1588 m
= file
->private_data
;
1589 m
->private = PDE(inode
)->data
;
1595 * set up the iterator to start reading from the server list and return the first item
1597 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1599 /* lock the list against modification */
1600 spin_lock(&nfs_client_lock
);
1601 return seq_list_start_head(&nfs_client_list
, *_pos
);
1605 * move to next server
1607 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1609 return seq_list_next(v
, &nfs_client_list
, pos
);
1613 * clean up after reading from the transports list
1615 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1617 spin_unlock(&nfs_client_lock
);
1621 * display a header line followed by a load of call lines
1623 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1625 struct nfs_client
*clp
;
1627 /* display header on line 1 */
1628 if (v
== &nfs_client_list
) {
1629 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1633 /* display one transport per line on subsequent lines */
1634 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1636 seq_printf(m
, "v%u %s %s %3d %s\n",
1637 clp
->rpc_ops
->version
,
1638 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1639 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1640 atomic_read(&clp
->cl_count
),
1647 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1649 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1654 ret
= seq_open(file
, &nfs_volume_list_ops
);
1658 m
= file
->private_data
;
1659 m
->private = PDE(inode
)->data
;
1665 * set up the iterator to start reading from the volume list and return the first item
1667 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1669 /* lock the list against modification */
1670 spin_lock(&nfs_client_lock
);
1671 return seq_list_start_head(&nfs_volume_list
, *_pos
);
1675 * move to next volume
1677 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1679 return seq_list_next(v
, &nfs_volume_list
, pos
);
1683 * clean up after reading from the transports list
1685 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1687 spin_unlock(&nfs_client_lock
);
1691 * display a header line followed by a load of call lines
1693 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1695 struct nfs_server
*server
;
1696 struct nfs_client
*clp
;
1697 char dev
[8], fsid
[17];
1699 /* display header on line 1 */
1700 if (v
== &nfs_volume_list
) {
1701 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1704 /* display one transport per line on subsequent lines */
1705 server
= list_entry(v
, struct nfs_server
, master_link
);
1706 clp
= server
->nfs_client
;
1708 snprintf(dev
, 8, "%u:%u",
1709 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1711 snprintf(fsid
, 17, "%llx:%llx",
1712 (unsigned long long) server
->fsid
.major
,
1713 (unsigned long long) server
->fsid
.minor
);
1715 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1716 clp
->rpc_ops
->version
,
1717 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1718 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1721 nfs_server_fscache_state(server
));
1727 * initialise the /proc/fs/nfsfs/ directory
1729 int __init
nfs_fs_proc_init(void)
1731 struct proc_dir_entry
*p
;
1733 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1737 /* a file of servers with which we're dealing */
1738 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1739 proc_fs_nfs
, &nfs_server_list_fops
);
1743 /* a file of volumes that we have mounted */
1744 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1745 proc_fs_nfs
, &nfs_volume_list_fops
);
1751 remove_proc_entry("servers", proc_fs_nfs
);
1753 remove_proc_entry("fs/nfsfs", NULL
);
1759 * clean up the /proc/fs/nfsfs/ directory
1761 void nfs_fs_proc_exit(void)
1763 remove_proc_entry("volumes", proc_fs_nfs
);
1764 remove_proc_entry("servers", proc_fs_nfs
);
1765 remove_proc_entry("fs/nfsfs", NULL
);
1768 #endif /* CONFIG_PROC_FS */