1 /* client.c: NFS client sharing and management code
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include <linux/time.h>
17 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/stat.h>
21 #include <linux/errno.h>
22 #include <linux/unistd.h>
23 #include <linux/sunrpc/clnt.h>
24 #include <linux/sunrpc/stats.h>
25 #include <linux/sunrpc/metrics.h>
26 #include <linux/sunrpc/xprtsock.h>
27 #include <linux/sunrpc/xprtrdma.h>
28 #include <linux/nfs_fs.h>
29 #include <linux/nfs_mount.h>
30 #include <linux/nfs4_mount.h>
31 #include <linux/lockd/bind.h>
32 #include <linux/seq_file.h>
33 #include <linux/mount.h>
34 #include <linux/nfs_idmap.h>
35 #include <linux/vfs.h>
36 #include <linux/inet.h>
37 #include <linux/in6.h>
38 #include <linux/slab.h>
40 #include <linux/nfs_xdr.h>
41 #include <linux/sunrpc/bc_xprt.h>
43 #include <asm/system.h>
47 #include "delegation.h"
52 #define NFSDBG_FACILITY NFSDBG_CLIENT
54 static DEFINE_SPINLOCK(nfs_client_lock
);
55 static LIST_HEAD(nfs_client_list
);
56 static LIST_HEAD(nfs_volume_list
);
57 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
62 static struct rpc_version
*nfs_version
[5] = {
72 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",
81 struct rpc_stat nfs_rpcstat
= {
82 .program
= &nfs_program
86 #ifdef CONFIG_NFS_V3_ACL
87 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
88 static struct rpc_version
* nfsacl_version
[] = {
89 [3] = &nfsacl_version3
,
92 struct rpc_program nfsacl_program
= {
94 .number
= NFS_ACL_PROGRAM
,
95 .nrvers
= ARRAY_SIZE(nfsacl_version
),
96 .version
= nfsacl_version
,
97 .stats
= &nfsacl_rpcstat
,
99 #endif /* CONFIG_NFS_V3_ACL */
101 struct nfs_client_initdata
{
102 const char *hostname
;
103 const struct sockaddr
*addr
;
105 const struct nfs_rpc_ops
*rpc_ops
;
111 * Allocate a shared client record
113 * Since these are allocated/deallocated very rarely, we don't
114 * bother putting them in a slab cache...
116 static struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
118 struct nfs_client
*clp
;
119 struct rpc_cred
*cred
;
122 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
125 clp
->rpc_ops
= cl_init
->rpc_ops
;
127 atomic_set(&clp
->cl_count
, 1);
128 clp
->cl_cons_state
= NFS_CS_INITING
;
130 memcpy(&clp
->cl_addr
, cl_init
->addr
, cl_init
->addrlen
);
131 clp
->cl_addrlen
= cl_init
->addrlen
;
133 if (cl_init
->hostname
) {
135 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
136 if (!clp
->cl_hostname
)
140 INIT_LIST_HEAD(&clp
->cl_superblocks
);
141 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
143 clp
->cl_proto
= cl_init
->proto
;
146 INIT_LIST_HEAD(&clp
->cl_delegations
);
147 spin_lock_init(&clp
->cl_lock
);
148 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
149 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
150 clp
->cl_boot_time
= CURRENT_TIME
;
151 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
152 clp
->cl_minorversion
= cl_init
->minorversion
;
153 clp
->cl_mvops
= nfs_v4_minor_ops
[cl_init
->minorversion
];
155 cred
= rpc_lookup_machine_cred();
157 clp
->cl_machine_cred
= cred
;
159 nfs_fscache_get_client_cookie(clp
);
171 * Clears/puts all minor version specific parts from an nfs_client struct
172 * reverting it to minorversion 0.
174 static void nfs4_clear_client_minor_version(struct nfs_client
*clp
)
176 #ifdef CONFIG_NFS_V4_1
177 if (nfs4_has_session(clp
)) {
178 nfs4_destroy_session(clp
->cl_session
);
179 clp
->cl_session
= NULL
;
182 clp
->cl_mvops
= nfs_v4_minor_ops
[0];
183 #endif /* CONFIG_NFS_V4_1 */
187 * Destroy the NFS4 callback service
189 static void nfs4_destroy_callback(struct nfs_client
*clp
)
191 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
192 nfs_callback_down(clp
->cl_mvops
->minor_version
);
195 static void nfs4_shutdown_client(struct nfs_client
*clp
)
197 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
198 nfs4_kill_renewd(clp
);
199 nfs4_clear_client_minor_version(clp
);
200 nfs4_destroy_callback(clp
);
201 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
202 nfs_idmap_delete(clp
);
204 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
207 static void nfs4_shutdown_client(struct nfs_client
*clp
)
210 #endif /* CONFIG_NFS_V4 */
213 * Destroy a shared client record
215 static void nfs_free_client(struct nfs_client
*clp
)
217 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
219 nfs4_shutdown_client(clp
);
221 nfs_fscache_release_client_cookie(clp
);
223 /* -EIO all pending I/O */
224 if (!IS_ERR(clp
->cl_rpcclient
))
225 rpc_shutdown_client(clp
->cl_rpcclient
);
227 if (clp
->cl_machine_cred
!= NULL
)
228 put_rpccred(clp
->cl_machine_cred
);
230 kfree(clp
->cl_hostname
);
233 dprintk("<-- nfs_free_client()\n");
237 * Release a reference to a shared client record
239 void nfs_put_client(struct nfs_client
*clp
)
244 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
246 if (atomic_dec_and_lock(&clp
->cl_count
, &nfs_client_lock
)) {
247 list_del(&clp
->cl_share_link
);
248 spin_unlock(&nfs_client_lock
);
250 BUG_ON(!list_empty(&clp
->cl_superblocks
));
252 nfs_free_client(clp
);
256 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
258 * Test if two ip6 socket addresses refer to the same socket by
259 * comparing relevant fields. The padding bytes specifically, are not
260 * compared. sin6_flowinfo is not compared because it only affects QoS
261 * and sin6_scope_id is only compared if the address is "link local"
262 * because "link local" addresses need only be unique to a specific
263 * link. Conversely, ordinary unicast addresses might have different
266 * The caller should ensure both socket addresses are AF_INET6.
268 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
269 const struct sockaddr
*sa2
)
271 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
272 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
274 if (ipv6_addr_scope(&sin1
->sin6_addr
) == IPV6_ADDR_SCOPE_LINKLOCAL
&&
275 sin1
->sin6_scope_id
!= sin2
->sin6_scope_id
)
278 return ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
);
280 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
281 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
282 const struct sockaddr
*sa2
)
289 * Test if two ip4 socket addresses refer to the same socket, by
290 * comparing relevant fields. The padding bytes specifically, are
293 * The caller should ensure both socket addresses are AF_INET.
295 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
296 const struct sockaddr
*sa2
)
298 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
299 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
301 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
304 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
305 const struct sockaddr
*sa2
)
307 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
308 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
310 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
311 (sin1
->sin6_port
== sin2
->sin6_port
);
314 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
315 const struct sockaddr
*sa2
)
317 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
318 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
320 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
321 (sin1
->sin_port
== sin2
->sin_port
);
325 * Test if two socket addresses represent the same actual socket,
326 * by comparing (only) relevant fields, excluding the port number.
328 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
329 const struct sockaddr
*sa2
)
331 if (sa1
->sa_family
!= sa2
->sa_family
)
334 switch (sa1
->sa_family
) {
336 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
338 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
344 * Test if two socket addresses represent the same actual socket,
345 * by comparing (only) relevant fields, including the port number.
347 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
348 const struct sockaddr
*sa2
)
350 if (sa1
->sa_family
!= sa2
->sa_family
)
353 switch (sa1
->sa_family
) {
355 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
357 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
363 * Find a client by IP address and protocol version
364 * - returns NULL if no such client
366 struct nfs_client
*nfs_find_client(const struct sockaddr
*addr
, u32 nfsversion
)
368 struct nfs_client
*clp
;
370 spin_lock(&nfs_client_lock
);
371 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
372 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
374 /* Don't match clients that failed to initialise properly */
375 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
376 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
379 /* Different NFS versions cannot share the same nfs_client */
380 if (clp
->rpc_ops
->version
!= nfsversion
)
383 /* Match only the IP address, not the port number */
384 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
387 atomic_inc(&clp
->cl_count
);
388 spin_unlock(&nfs_client_lock
);
391 spin_unlock(&nfs_client_lock
);
396 * Find a client by IP address and protocol version
397 * - returns NULL if no such client
399 struct nfs_client
*nfs_find_client_next(struct nfs_client
*clp
)
401 struct sockaddr
*sap
= (struct sockaddr
*)&clp
->cl_addr
;
402 u32 nfsvers
= clp
->rpc_ops
->version
;
404 spin_lock(&nfs_client_lock
);
405 list_for_each_entry_continue(clp
, &nfs_client_list
, cl_share_link
) {
406 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
408 /* Don't match clients that failed to initialise properly */
409 if (clp
->cl_cons_state
!= NFS_CS_READY
)
412 /* Different NFS versions cannot share the same nfs_client */
413 if (clp
->rpc_ops
->version
!= nfsvers
)
416 /* Match only the IP address, not the port number */
417 if (!nfs_sockaddr_match_ipaddr(sap
, clap
))
420 atomic_inc(&clp
->cl_count
);
421 spin_unlock(&nfs_client_lock
);
424 spin_unlock(&nfs_client_lock
);
429 * Find an nfs_client on the list that matches the initialisation data
432 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
434 struct nfs_client
*clp
;
435 const struct sockaddr
*sap
= data
->addr
;
437 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
438 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
439 /* Don't match clients that failed to initialise properly */
440 if (clp
->cl_cons_state
< 0)
443 /* Different NFS versions cannot share the same nfs_client */
444 if (clp
->rpc_ops
!= data
->rpc_ops
)
447 if (clp
->cl_proto
!= data
->proto
)
449 /* Match nfsv4 minorversion */
450 if (clp
->cl_minorversion
!= data
->minorversion
)
452 /* Match the full socket address */
453 if (!nfs_sockaddr_cmp(sap
, clap
))
456 atomic_inc(&clp
->cl_count
);
463 * Look up a client by IP address and protocol version
464 * - creates a new record if one doesn't yet exist
466 static struct nfs_client
*nfs_get_client(const struct nfs_client_initdata
*cl_init
)
468 struct nfs_client
*clp
, *new = NULL
;
471 dprintk("--> nfs_get_client(%s,v%u)\n",
472 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
474 /* see if the client already exists */
476 spin_lock(&nfs_client_lock
);
478 clp
= nfs_match_client(cl_init
);
484 spin_unlock(&nfs_client_lock
);
486 new = nfs_alloc_client(cl_init
);
487 } while (!IS_ERR(new));
489 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
492 /* install a new client and return with it unready */
495 list_add(&clp
->cl_share_link
, &nfs_client_list
);
496 spin_unlock(&nfs_client_lock
);
497 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
500 /* found an existing client
501 * - make sure it's ready before returning
504 spin_unlock(&nfs_client_lock
);
507 nfs_free_client(new);
509 error
= wait_event_killable(nfs_client_active_wq
,
510 clp
->cl_cons_state
< NFS_CS_INITING
);
513 return ERR_PTR(-ERESTARTSYS
);
516 if (clp
->cl_cons_state
< NFS_CS_READY
) {
517 error
= clp
->cl_cons_state
;
519 return ERR_PTR(error
);
522 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
524 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
529 * Mark a server as ready or failed
531 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
533 clp
->cl_cons_state
= state
;
534 wake_up_all(&nfs_client_active_wq
);
538 * With sessions, the client is not marked ready until after a
539 * successful EXCHANGE_ID and CREATE_SESSION.
541 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
542 * other versions of NFS can be tried.
544 int nfs4_check_client_ready(struct nfs_client
*clp
)
546 if (!nfs4_has_session(clp
))
548 if (clp
->cl_cons_state
< NFS_CS_READY
)
549 return -EPROTONOSUPPORT
;
554 * Initialise the timeout values for a connection
556 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
557 unsigned int timeo
, unsigned int retrans
)
559 to
->to_initval
= timeo
* HZ
/ 10;
560 to
->to_retries
= retrans
;
563 case XPRT_TRANSPORT_TCP
:
564 case XPRT_TRANSPORT_RDMA
:
565 if (to
->to_retries
== 0)
566 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
567 if (to
->to_initval
== 0)
568 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
569 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
570 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
571 to
->to_increment
= to
->to_initval
;
572 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
573 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
574 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
575 if (to
->to_maxval
< to
->to_initval
)
576 to
->to_maxval
= to
->to_initval
;
577 to
->to_exponential
= 0;
579 case XPRT_TRANSPORT_UDP
:
580 if (to
->to_retries
== 0)
581 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
583 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
584 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
585 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
586 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
587 to
->to_exponential
= 1;
595 * Create an RPC client handle
597 static int nfs_create_rpc_client(struct nfs_client
*clp
,
598 const struct rpc_timeout
*timeparms
,
599 rpc_authflavor_t flavor
,
600 int discrtry
, int noresvport
)
602 struct rpc_clnt
*clnt
= NULL
;
603 struct rpc_create_args args
= {
604 .protocol
= clp
->cl_proto
,
605 .address
= (struct sockaddr
*)&clp
->cl_addr
,
606 .addrsize
= clp
->cl_addrlen
,
607 .timeout
= timeparms
,
608 .servername
= clp
->cl_hostname
,
609 .program
= &nfs_program
,
610 .version
= clp
->rpc_ops
->version
,
611 .authflavor
= flavor
,
615 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
617 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
619 if (!IS_ERR(clp
->cl_rpcclient
))
622 clnt
= rpc_create(&args
);
624 dprintk("%s: cannot create RPC client. Error = %ld\n",
625 __func__
, PTR_ERR(clnt
));
626 return PTR_ERR(clnt
);
629 clp
->cl_rpcclient
= clnt
;
634 * Version 2 or 3 client destruction
636 static void nfs_destroy_server(struct nfs_server
*server
)
638 if (!(server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) ||
639 !(server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
640 nlmclnt_done(server
->nlm_host
);
644 * Version 2 or 3 lockd setup
646 static int nfs_start_lockd(struct nfs_server
*server
)
648 struct nlm_host
*host
;
649 struct nfs_client
*clp
= server
->nfs_client
;
650 struct nlmclnt_initdata nlm_init
= {
651 .hostname
= clp
->cl_hostname
,
652 .address
= (struct sockaddr
*)&clp
->cl_addr
,
653 .addrlen
= clp
->cl_addrlen
,
654 .nfs_version
= clp
->rpc_ops
->version
,
655 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
659 if (nlm_init
.nfs_version
> 3)
661 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
662 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
665 switch (clp
->cl_proto
) {
667 nlm_init
.protocol
= IPPROTO_TCP
;
669 case XPRT_TRANSPORT_UDP
:
670 nlm_init
.protocol
= IPPROTO_UDP
;
673 host
= nlmclnt_init(&nlm_init
);
675 return PTR_ERR(host
);
677 server
->nlm_host
= host
;
678 server
->destroy
= nfs_destroy_server
;
683 * Initialise an NFSv3 ACL client connection
685 #ifdef CONFIG_NFS_V3_ACL
686 static void nfs_init_server_aclclient(struct nfs_server
*server
)
688 if (server
->nfs_client
->rpc_ops
->version
!= 3)
690 if (server
->flags
& NFS_MOUNT_NOACL
)
693 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
694 if (IS_ERR(server
->client_acl
))
697 /* No errors! Assume that Sun nfsacls are supported */
698 server
->caps
|= NFS_CAP_ACLS
;
702 server
->caps
&= ~NFS_CAP_ACLS
;
705 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
707 server
->flags
&= ~NFS_MOUNT_NOACL
;
708 server
->caps
&= ~NFS_CAP_ACLS
;
713 * Create a general RPC client
715 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
716 const struct rpc_timeout
*timeo
,
717 rpc_authflavor_t pseudoflavour
)
719 struct nfs_client
*clp
= server
->nfs_client
;
721 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
722 if (IS_ERR(server
->client
)) {
723 dprintk("%s: couldn't create rpc_client!\n", __func__
);
724 return PTR_ERR(server
->client
);
727 memcpy(&server
->client
->cl_timeout_default
,
729 sizeof(server
->client
->cl_timeout_default
));
730 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
732 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
733 struct rpc_auth
*auth
;
735 auth
= rpcauth_create(pseudoflavour
, server
->client
);
737 dprintk("%s: couldn't create credcache!\n", __func__
);
738 return PTR_ERR(auth
);
741 server
->client
->cl_softrtry
= 0;
742 if (server
->flags
& NFS_MOUNT_SOFT
)
743 server
->client
->cl_softrtry
= 1;
749 * Initialise an NFS2 or NFS3 client
751 static int nfs_init_client(struct nfs_client
*clp
,
752 const struct rpc_timeout
*timeparms
,
753 const struct nfs_parsed_mount_data
*data
)
757 if (clp
->cl_cons_state
== NFS_CS_READY
) {
758 /* the client is already initialised */
759 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
764 * Create a client RPC handle for doing FSSTAT with UNIX auth only
765 * - RFC 2623, sec 2.3.2
767 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
,
768 0, data
->flags
& NFS_MOUNT_NORESVPORT
);
771 nfs_mark_client_ready(clp
, NFS_CS_READY
);
775 nfs_mark_client_ready(clp
, error
);
776 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
781 * Create a version 2 or 3 client
783 static int nfs_init_server(struct nfs_server
*server
,
784 const struct nfs_parsed_mount_data
*data
)
786 struct nfs_client_initdata cl_init
= {
787 .hostname
= data
->nfs_server
.hostname
,
788 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
789 .addrlen
= data
->nfs_server
.addrlen
,
790 .rpc_ops
= &nfs_v2_clientops
,
791 .proto
= data
->nfs_server
.protocol
,
793 struct rpc_timeout timeparms
;
794 struct nfs_client
*clp
;
797 dprintk("--> nfs_init_server()\n");
800 if (data
->version
== 3)
801 cl_init
.rpc_ops
= &nfs_v3_clientops
;
804 /* Allocate or find a client reference we can use */
805 clp
= nfs_get_client(&cl_init
);
807 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
811 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
812 data
->timeo
, data
->retrans
);
813 error
= nfs_init_client(clp
, &timeparms
, data
);
817 server
->nfs_client
= clp
;
819 /* Initialise the client representation from the mount data */
820 server
->flags
= data
->flags
;
821 server
->options
= data
->options
;
822 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
823 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
824 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
;
827 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
829 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
831 server
->acregmin
= data
->acregmin
* HZ
;
832 server
->acregmax
= data
->acregmax
* HZ
;
833 server
->acdirmin
= data
->acdirmin
* HZ
;
834 server
->acdirmax
= data
->acdirmax
* HZ
;
836 /* Start lockd here, before we might error out */
837 error
= nfs_start_lockd(server
);
841 server
->port
= data
->nfs_server
.port
;
843 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
847 /* Preserve the values of mount_server-related mount options */
848 if (data
->mount_server
.addrlen
) {
849 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
850 data
->mount_server
.addrlen
);
851 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
853 server
->mountd_version
= data
->mount_server
.version
;
854 server
->mountd_port
= data
->mount_server
.port
;
855 server
->mountd_protocol
= data
->mount_server
.protocol
;
857 server
->namelen
= data
->namlen
;
858 /* Create a client RPC handle for the NFSv3 ACL management interface */
859 nfs_init_server_aclclient(server
);
860 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
864 server
->nfs_client
= NULL
;
866 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
871 * Load up the server record from information gained in an fsinfo record
873 static void nfs_server_set_fsinfo(struct nfs_server
*server
, struct nfs_fsinfo
*fsinfo
)
875 unsigned long max_rpc_payload
;
877 /* Work out a lot of parameters */
878 if (server
->rsize
== 0)
879 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
880 if (server
->wsize
== 0)
881 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
883 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
884 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
885 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
886 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
888 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
889 if (server
->rsize
> max_rpc_payload
)
890 server
->rsize
= max_rpc_payload
;
891 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
892 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
893 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
895 server
->backing_dev_info
.name
= "nfs";
896 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
898 if (server
->wsize
> max_rpc_payload
)
899 server
->wsize
= max_rpc_payload
;
900 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
901 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
902 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
903 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
905 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
906 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
907 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
908 if (server
->dtsize
> server
->rsize
)
909 server
->dtsize
= server
->rsize
;
911 if (server
->flags
& NFS_MOUNT_NOAC
) {
912 server
->acregmin
= server
->acregmax
= 0;
913 server
->acdirmin
= server
->acdirmax
= 0;
916 server
->maxfilesize
= fsinfo
->maxfilesize
;
918 server
->time_delta
= fsinfo
->time_delta
;
920 /* We're airborne Set socket buffersize */
921 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
925 * Probe filesystem information, including the FSID on v2/v3
927 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
929 struct nfs_fsinfo fsinfo
;
930 struct nfs_client
*clp
= server
->nfs_client
;
933 dprintk("--> nfs_probe_fsinfo()\n");
935 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
936 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
941 fsinfo
.fattr
= fattr
;
942 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
946 nfs_server_set_fsinfo(server
, &fsinfo
);
948 /* Get some general file system info */
949 if (server
->namelen
== 0) {
950 struct nfs_pathconf pathinfo
;
952 pathinfo
.fattr
= fattr
;
953 nfs_fattr_init(fattr
);
955 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
956 server
->namelen
= pathinfo
.max_namelen
;
959 dprintk("<-- nfs_probe_fsinfo() = 0\n");
963 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
968 * Copy useful information when duplicating a server record
970 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
972 target
->flags
= source
->flags
;
973 target
->rsize
= source
->rsize
;
974 target
->wsize
= source
->wsize
;
975 target
->acregmin
= source
->acregmin
;
976 target
->acregmax
= source
->acregmax
;
977 target
->acdirmin
= source
->acdirmin
;
978 target
->acdirmax
= source
->acdirmax
;
979 target
->caps
= source
->caps
;
980 target
->options
= source
->options
;
984 * Allocate and initialise a server record
986 static struct nfs_server
*nfs_alloc_server(void)
988 struct nfs_server
*server
;
990 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
994 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
996 /* Zero out the NFS state stuff */
997 INIT_LIST_HEAD(&server
->client_link
);
998 INIT_LIST_HEAD(&server
->master_link
);
1000 atomic_set(&server
->active
, 0);
1002 server
->io_stats
= nfs_alloc_iostats();
1003 if (!server
->io_stats
) {
1008 if (bdi_init(&server
->backing_dev_info
)) {
1009 nfs_free_iostats(server
->io_stats
);
1018 * Free up a server record
1020 void nfs_free_server(struct nfs_server
*server
)
1022 dprintk("--> nfs_free_server()\n");
1024 spin_lock(&nfs_client_lock
);
1025 list_del(&server
->client_link
);
1026 list_del(&server
->master_link
);
1027 spin_unlock(&nfs_client_lock
);
1029 if (server
->destroy
!= NULL
)
1030 server
->destroy(server
);
1032 if (!IS_ERR(server
->client_acl
))
1033 rpc_shutdown_client(server
->client_acl
);
1034 if (!IS_ERR(server
->client
))
1035 rpc_shutdown_client(server
->client
);
1037 nfs_put_client(server
->nfs_client
);
1039 nfs_free_iostats(server
->io_stats
);
1040 bdi_destroy(&server
->backing_dev_info
);
1042 nfs_release_automount_timer();
1043 dprintk("<-- nfs_free_server()\n");
1047 * Create a version 2 or 3 volume record
1048 * - keyed on server and FSID
1050 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1051 struct nfs_fh
*mntfh
)
1053 struct nfs_server
*server
;
1054 struct nfs_fattr
*fattr
;
1057 server
= nfs_alloc_server();
1059 return ERR_PTR(-ENOMEM
);
1062 fattr
= nfs_alloc_fattr();
1066 /* Get a client representation */
1067 error
= nfs_init_server(server
, data
);
1071 BUG_ON(!server
->nfs_client
);
1072 BUG_ON(!server
->nfs_client
->rpc_ops
);
1073 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1075 /* Probe the root fh to retrieve its FSID */
1076 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1079 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1080 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1081 server
->namelen
= NFS3_MAXNAMLEN
;
1082 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1083 server
->caps
|= NFS_CAP_READDIRPLUS
;
1085 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1086 server
->namelen
= NFS2_MAXNAMLEN
;
1089 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1090 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, fattr
);
1092 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1096 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1098 dprintk("Server FSID: %llx:%llx\n",
1099 (unsigned long long) server
->fsid
.major
,
1100 (unsigned long long) server
->fsid
.minor
);
1102 spin_lock(&nfs_client_lock
);
1103 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1104 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1105 spin_unlock(&nfs_client_lock
);
1107 server
->mount_time
= jiffies
;
1108 nfs_free_fattr(fattr
);
1112 nfs_free_fattr(fattr
);
1113 nfs_free_server(server
);
1114 return ERR_PTR(error
);
1117 #ifdef CONFIG_NFS_V4
1119 * Initialize the NFS4 callback service
1121 static int nfs4_init_callback(struct nfs_client
*clp
)
1125 if (clp
->rpc_ops
->version
== 4) {
1126 if (nfs4_has_session(clp
)) {
1127 error
= xprt_setup_backchannel(
1128 clp
->cl_rpcclient
->cl_xprt
,
1129 NFS41_BC_MIN_CALLBACKS
);
1134 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
,
1135 clp
->cl_rpcclient
->cl_xprt
);
1137 dprintk("%s: failed to start callback. Error = %d\n",
1141 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
1147 * Initialize the minor version specific parts of an NFS4 client record
1149 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
1151 #if defined(CONFIG_NFS_V4_1)
1152 if (clp
->cl_mvops
->minor_version
) {
1153 struct nfs4_session
*session
= NULL
;
1155 * Create the session and mark it expired.
1156 * When a SEQUENCE operation encounters the expired session
1157 * it will do session recovery to initialize it.
1159 session
= nfs4_alloc_session(clp
);
1163 clp
->cl_session
= session
;
1165 * The create session reply races with the server back
1166 * channel probe. Mark the client NFS_CS_SESSION_INITING
1167 * so that the client back channel can find the
1170 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
1172 #endif /* CONFIG_NFS_V4_1 */
1174 return nfs4_init_callback(clp
);
1178 * Initialise an NFS4 client record
1180 static int nfs4_init_client(struct nfs_client
*clp
,
1181 const struct rpc_timeout
*timeparms
,
1182 const char *ip_addr
,
1183 rpc_authflavor_t authflavour
,
1188 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1189 /* the client is initialised already */
1190 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1194 /* Check NFS protocol revision and initialize RPC op vector */
1195 clp
->rpc_ops
= &nfs_v4_clientops
;
1197 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
,
1198 1, flags
& NFS_MOUNT_NORESVPORT
);
1201 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1203 error
= nfs_idmap_new(clp
);
1205 dprintk("%s: failed to create idmapper. Error = %d\n",
1209 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1211 error
= nfs4_init_client_minor_version(clp
);
1215 if (!nfs4_has_session(clp
))
1216 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1220 nfs_mark_client_ready(clp
, error
);
1221 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1226 * Set up an NFS4 client
1228 static int nfs4_set_client(struct nfs_server
*server
,
1229 const char *hostname
,
1230 const struct sockaddr
*addr
,
1231 const size_t addrlen
,
1232 const char *ip_addr
,
1233 rpc_authflavor_t authflavour
,
1234 int proto
, const struct rpc_timeout
*timeparms
,
1237 struct nfs_client_initdata cl_init
= {
1238 .hostname
= hostname
,
1241 .rpc_ops
= &nfs_v4_clientops
,
1243 .minorversion
= minorversion
,
1245 struct nfs_client
*clp
;
1248 dprintk("--> nfs4_set_client()\n");
1250 /* Allocate or find a client reference we can use */
1251 clp
= nfs_get_client(&cl_init
);
1253 error
= PTR_ERR(clp
);
1256 error
= nfs4_init_client(clp
, timeparms
, ip_addr
, authflavour
,
1261 server
->nfs_client
= clp
;
1262 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1266 nfs_put_client(clp
);
1268 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1274 * Session has been established, and the client marked ready.
1275 * Set the mount rsize and wsize with negotiated fore channel
1276 * attributes which will be bound checked in nfs_server_set_fsinfo.
1278 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1280 #ifdef CONFIG_NFS_V4_1
1281 struct nfs4_session
*sess
;
1285 if (!nfs4_has_session(server
->nfs_client
))
1287 sess
= server
->nfs_client
->cl_session
;
1288 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
1289 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
1291 if (server
->rsize
> server_resp_sz
)
1292 server
->rsize
= server_resp_sz
;
1293 if (server
->wsize
> server_rqst_sz
)
1294 server
->wsize
= server_rqst_sz
;
1295 #endif /* CONFIG_NFS_V4_1 */
1298 static int nfs4_server_common_setup(struct nfs_server
*server
,
1299 struct nfs_fh
*mntfh
)
1301 struct nfs_fattr
*fattr
;
1304 BUG_ON(!server
->nfs_client
);
1305 BUG_ON(!server
->nfs_client
->rpc_ops
);
1306 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1308 fattr
= nfs_alloc_fattr();
1312 /* We must ensure the session is initialised first */
1313 error
= nfs4_init_session(server
);
1317 /* Probe the root fh to retrieve its FSID and filehandle */
1318 error
= nfs4_get_rootfh(server
, mntfh
);
1322 dprintk("Server FSID: %llx:%llx\n",
1323 (unsigned long long) server
->fsid
.major
,
1324 (unsigned long long) server
->fsid
.minor
);
1325 dprintk("Mount FH: %d\n", mntfh
->size
);
1327 nfs4_session_set_rwsize(server
);
1329 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1333 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1334 server
->namelen
= NFS4_MAXNAMLEN
;
1336 spin_lock(&nfs_client_lock
);
1337 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1338 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1339 spin_unlock(&nfs_client_lock
);
1341 server
->mount_time
= jiffies
;
1343 nfs_free_fattr(fattr
);
1348 * Create a version 4 volume record
1350 static int nfs4_init_server(struct nfs_server
*server
,
1351 const struct nfs_parsed_mount_data
*data
)
1353 struct rpc_timeout timeparms
;
1356 dprintk("--> nfs4_init_server()\n");
1358 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1359 data
->timeo
, data
->retrans
);
1361 /* Initialise the client representation from the mount data */
1362 server
->flags
= data
->flags
;
1363 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
|NFS_CAP_POSIX_LOCK
;
1364 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1365 server
->caps
|= NFS_CAP_READDIRPLUS
;
1366 server
->options
= data
->options
;
1368 /* Get a client record */
1369 error
= nfs4_set_client(server
,
1370 data
->nfs_server
.hostname
,
1371 (const struct sockaddr
*)&data
->nfs_server
.address
,
1372 data
->nfs_server
.addrlen
,
1373 data
->client_address
,
1374 data
->auth_flavors
[0],
1375 data
->nfs_server
.protocol
,
1377 data
->minorversion
);
1382 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1384 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1386 server
->acregmin
= data
->acregmin
* HZ
;
1387 server
->acregmax
= data
->acregmax
* HZ
;
1388 server
->acdirmin
= data
->acdirmin
* HZ
;
1389 server
->acdirmax
= data
->acdirmax
* HZ
;
1391 server
->port
= data
->nfs_server
.port
;
1393 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1397 dprintk("<-- nfs4_init_server() = %d\n", error
);
1402 * Create a version 4 volume record
1403 * - keyed on server and FSID
1405 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1406 struct nfs_fh
*mntfh
)
1408 struct nfs_server
*server
;
1411 dprintk("--> nfs4_create_server()\n");
1413 server
= nfs_alloc_server();
1415 return ERR_PTR(-ENOMEM
);
1417 /* set up the general RPC client */
1418 error
= nfs4_init_server(server
, data
);
1422 error
= nfs4_server_common_setup(server
, mntfh
);
1426 dprintk("<-- nfs4_create_server() = %p\n", server
);
1430 nfs_free_server(server
);
1431 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1432 return ERR_PTR(error
);
1436 * Create an NFS4 referral server record
1438 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1439 struct nfs_fh
*mntfh
)
1441 struct nfs_client
*parent_client
;
1442 struct nfs_server
*server
, *parent_server
;
1445 dprintk("--> nfs4_create_referral_server()\n");
1447 server
= nfs_alloc_server();
1449 return ERR_PTR(-ENOMEM
);
1451 parent_server
= NFS_SB(data
->sb
);
1452 parent_client
= parent_server
->nfs_client
;
1454 /* Initialise the client representation from the parent server */
1455 nfs_server_copy_userdata(server
, parent_server
);
1456 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1458 /* Get a client representation.
1459 * Note: NFSv4 always uses TCP, */
1460 error
= nfs4_set_client(server
, data
->hostname
,
1463 parent_client
->cl_ipaddr
,
1465 parent_server
->client
->cl_xprt
->prot
,
1466 parent_server
->client
->cl_timeout
,
1467 parent_client
->cl_mvops
->minor_version
);
1471 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1475 error
= nfs4_server_common_setup(server
, mntfh
);
1479 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1483 nfs_free_server(server
);
1484 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1485 return ERR_PTR(error
);
1488 #endif /* CONFIG_NFS_V4 */
1491 * Clone an NFS2, NFS3 or NFS4 server record
1493 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1495 struct nfs_fattr
*fattr
)
1497 struct nfs_server
*server
;
1498 struct nfs_fattr
*fattr_fsinfo
;
1501 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1502 (unsigned long long) fattr
->fsid
.major
,
1503 (unsigned long long) fattr
->fsid
.minor
);
1505 server
= nfs_alloc_server();
1507 return ERR_PTR(-ENOMEM
);
1510 fattr_fsinfo
= nfs_alloc_fattr();
1511 if (fattr_fsinfo
== NULL
)
1512 goto out_free_server
;
1514 /* Copy data from the source */
1515 server
->nfs_client
= source
->nfs_client
;
1516 atomic_inc(&server
->nfs_client
->cl_count
);
1517 nfs_server_copy_userdata(server
, source
);
1519 server
->fsid
= fattr
->fsid
;
1521 error
= nfs_init_server_rpcclient(server
,
1522 source
->client
->cl_timeout
,
1523 source
->client
->cl_auth
->au_flavor
);
1525 goto out_free_server
;
1526 if (!IS_ERR(source
->client_acl
))
1527 nfs_init_server_aclclient(server
);
1529 /* probe the filesystem info for this server filesystem */
1530 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1532 goto out_free_server
;
1534 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1535 server
->namelen
= NFS4_MAXNAMLEN
;
1537 dprintk("Cloned FSID: %llx:%llx\n",
1538 (unsigned long long) server
->fsid
.major
,
1539 (unsigned long long) server
->fsid
.minor
);
1541 error
= nfs_start_lockd(server
);
1543 goto out_free_server
;
1545 spin_lock(&nfs_client_lock
);
1546 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1547 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1548 spin_unlock(&nfs_client_lock
);
1550 server
->mount_time
= jiffies
;
1552 nfs_free_fattr(fattr_fsinfo
);
1553 dprintk("<-- nfs_clone_server() = %p\n", server
);
1557 nfs_free_fattr(fattr_fsinfo
);
1558 nfs_free_server(server
);
1559 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1560 return ERR_PTR(error
);
1563 #ifdef CONFIG_PROC_FS
1564 static struct proc_dir_entry
*proc_fs_nfs
;
1566 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1567 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1568 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1569 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1570 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1572 static const struct seq_operations nfs_server_list_ops
= {
1573 .start
= nfs_server_list_start
,
1574 .next
= nfs_server_list_next
,
1575 .stop
= nfs_server_list_stop
,
1576 .show
= nfs_server_list_show
,
1579 static const struct file_operations nfs_server_list_fops
= {
1580 .open
= nfs_server_list_open
,
1582 .llseek
= seq_lseek
,
1583 .release
= seq_release
,
1584 .owner
= THIS_MODULE
,
1587 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1588 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1589 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1590 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1591 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1593 static const struct seq_operations nfs_volume_list_ops
= {
1594 .start
= nfs_volume_list_start
,
1595 .next
= nfs_volume_list_next
,
1596 .stop
= nfs_volume_list_stop
,
1597 .show
= nfs_volume_list_show
,
1600 static const struct file_operations nfs_volume_list_fops
= {
1601 .open
= nfs_volume_list_open
,
1603 .llseek
= seq_lseek
,
1604 .release
= seq_release
,
1605 .owner
= THIS_MODULE
,
1609 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1612 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1617 ret
= seq_open(file
, &nfs_server_list_ops
);
1621 m
= file
->private_data
;
1622 m
->private = PDE(inode
)->data
;
1628 * set up the iterator to start reading from the server list and return the first item
1630 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1632 /* lock the list against modification */
1633 spin_lock(&nfs_client_lock
);
1634 return seq_list_start_head(&nfs_client_list
, *_pos
);
1638 * move to next server
1640 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1642 return seq_list_next(v
, &nfs_client_list
, pos
);
1646 * clean up after reading from the transports list
1648 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1650 spin_unlock(&nfs_client_lock
);
1654 * display a header line followed by a load of call lines
1656 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1658 struct nfs_client
*clp
;
1660 /* display header on line 1 */
1661 if (v
== &nfs_client_list
) {
1662 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1666 /* display one transport per line on subsequent lines */
1667 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1669 seq_printf(m
, "v%u %s %s %3d %s\n",
1670 clp
->rpc_ops
->version
,
1671 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1672 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1673 atomic_read(&clp
->cl_count
),
1680 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1682 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1687 ret
= seq_open(file
, &nfs_volume_list_ops
);
1691 m
= file
->private_data
;
1692 m
->private = PDE(inode
)->data
;
1698 * set up the iterator to start reading from the volume list and return the first item
1700 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1702 /* lock the list against modification */
1703 spin_lock(&nfs_client_lock
);
1704 return seq_list_start_head(&nfs_volume_list
, *_pos
);
1708 * move to next volume
1710 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1712 return seq_list_next(v
, &nfs_volume_list
, pos
);
1716 * clean up after reading from the transports list
1718 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1720 spin_unlock(&nfs_client_lock
);
1724 * display a header line followed by a load of call lines
1726 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1728 struct nfs_server
*server
;
1729 struct nfs_client
*clp
;
1730 char dev
[8], fsid
[17];
1732 /* display header on line 1 */
1733 if (v
== &nfs_volume_list
) {
1734 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1737 /* display one transport per line on subsequent lines */
1738 server
= list_entry(v
, struct nfs_server
, master_link
);
1739 clp
= server
->nfs_client
;
1741 snprintf(dev
, 8, "%u:%u",
1742 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1744 snprintf(fsid
, 17, "%llx:%llx",
1745 (unsigned long long) server
->fsid
.major
,
1746 (unsigned long long) server
->fsid
.minor
);
1748 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1749 clp
->rpc_ops
->version
,
1750 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1751 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1754 nfs_server_fscache_state(server
));
1760 * initialise the /proc/fs/nfsfs/ directory
1762 int __init
nfs_fs_proc_init(void)
1764 struct proc_dir_entry
*p
;
1766 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1770 /* a file of servers with which we're dealing */
1771 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1772 proc_fs_nfs
, &nfs_server_list_fops
);
1776 /* a file of volumes that we have mounted */
1777 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1778 proc_fs_nfs
, &nfs_volume_list_fops
);
1784 remove_proc_entry("servers", proc_fs_nfs
);
1786 remove_proc_entry("fs/nfsfs", NULL
);
1792 * clean up the /proc/fs/nfsfs/ directory
1794 void nfs_fs_proc_exit(void)
1796 remove_proc_entry("volumes", proc_fs_nfs
);
1797 remove_proc_entry("servers", proc_fs_nfs
);
1798 remove_proc_entry("fs/nfsfs", NULL
);
1801 #endif /* CONFIG_PROC_FS */