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>
42 #include <linux/nsproxy.h>
43 #include <linux/pid_namespace.h>
45 #include <asm/system.h>
49 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_CLIENT
58 DEFINE_SPINLOCK(nfs_client_lock
);
59 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
63 * Get a unique NFSv4.0 callback identifier which will be used
64 * by the V4.0 callback service to lookup the nfs_client struct
66 static int nfs_get_cb_ident_idr(struct nfs_client
*clp
, int minorversion
)
69 struct nfs_net
*nn
= net_generic(clp
->net
, nfs_net_id
);
71 if (clp
->rpc_ops
->version
!= 4 || minorversion
!= 0)
74 if (!idr_pre_get(&nn
->cb_ident_idr
, GFP_KERNEL
))
76 spin_lock(&nfs_client_lock
);
77 ret
= idr_get_new(&nn
->cb_ident_idr
, clp
, &clp
->cl_cb_ident
);
78 spin_unlock(&nfs_client_lock
);
83 #endif /* CONFIG_NFS_V4 */
86 * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
88 static bool nfs4_disable_idmapping
= true;
93 static const struct rpc_version
*nfs_version
[5] = {
103 const struct rpc_program nfs_program
= {
105 .number
= NFS_PROGRAM
,
106 .nrvers
= ARRAY_SIZE(nfs_version
),
107 .version
= nfs_version
,
108 .stats
= &nfs_rpcstat
,
109 .pipe_dir_name
= NFS_PIPE_DIRNAME
,
112 struct rpc_stat nfs_rpcstat
= {
113 .program
= &nfs_program
117 #ifdef CONFIG_NFS_V3_ACL
118 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
119 static const struct rpc_version
*nfsacl_version
[] = {
120 [3] = &nfsacl_version3
,
123 const struct rpc_program nfsacl_program
= {
125 .number
= NFS_ACL_PROGRAM
,
126 .nrvers
= ARRAY_SIZE(nfsacl_version
),
127 .version
= nfsacl_version
,
128 .stats
= &nfsacl_rpcstat
,
130 #endif /* CONFIG_NFS_V3_ACL */
132 struct nfs_client_initdata
{
133 const char *hostname
;
134 const struct sockaddr
*addr
;
136 const struct nfs_rpc_ops
*rpc_ops
;
143 * Allocate a shared client record
145 * Since these are allocated/deallocated very rarely, we don't
146 * bother putting them in a slab cache...
148 static struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
150 struct nfs_client
*clp
;
151 struct rpc_cred
*cred
;
154 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
157 clp
->rpc_ops
= cl_init
->rpc_ops
;
159 atomic_set(&clp
->cl_count
, 1);
160 clp
->cl_cons_state
= NFS_CS_INITING
;
162 memcpy(&clp
->cl_addr
, cl_init
->addr
, cl_init
->addrlen
);
163 clp
->cl_addrlen
= cl_init
->addrlen
;
165 if (cl_init
->hostname
) {
167 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
168 if (!clp
->cl_hostname
)
172 INIT_LIST_HEAD(&clp
->cl_superblocks
);
173 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
175 clp
->cl_proto
= cl_init
->proto
;
176 clp
->net
= cl_init
->net
;
179 err
= nfs_get_cb_ident_idr(clp
, cl_init
->minorversion
);
183 spin_lock_init(&clp
->cl_lock
);
184 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
185 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
186 clp
->cl_boot_time
= CURRENT_TIME
;
187 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
188 clp
->cl_minorversion
= cl_init
->minorversion
;
189 clp
->cl_mvops
= nfs_v4_minor_ops
[cl_init
->minorversion
];
191 cred
= rpc_lookup_machine_cred("*");
193 clp
->cl_machine_cred
= cred
;
194 nfs_fscache_get_client_cookie(clp
);
205 #ifdef CONFIG_NFS_V4_1
206 static void nfs4_shutdown_session(struct nfs_client
*clp
)
208 if (nfs4_has_session(clp
))
209 nfs4_destroy_session(clp
->cl_session
);
211 #else /* CONFIG_NFS_V4_1 */
212 static void nfs4_shutdown_session(struct nfs_client
*clp
)
215 #endif /* CONFIG_NFS_V4_1 */
218 * Destroy the NFS4 callback service
220 static void nfs4_destroy_callback(struct nfs_client
*clp
)
222 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
223 nfs_callback_down(clp
->cl_mvops
->minor_version
);
226 static void nfs4_shutdown_client(struct nfs_client
*clp
)
228 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
229 nfs4_kill_renewd(clp
);
230 nfs4_shutdown_session(clp
);
231 nfs4_destroy_callback(clp
);
232 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
233 nfs_idmap_delete(clp
);
235 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
238 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
239 void nfs_cleanup_cb_ident_idr(struct net
*net
)
241 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
243 idr_destroy(&nn
->cb_ident_idr
);
246 /* nfs_client_lock held */
247 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
249 struct nfs_net
*nn
= net_generic(clp
->net
, nfs_net_id
);
251 if (clp
->cl_cb_ident
)
252 idr_remove(&nn
->cb_ident_idr
, clp
->cl_cb_ident
);
255 static void pnfs_init_server(struct nfs_server
*server
)
257 rpc_init_wait_queue(&server
->roc_rpcwaitq
, "pNFS ROC");
260 static void nfs4_destroy_server(struct nfs_server
*server
)
262 nfs4_purge_state_owners(server
);
266 static void nfs4_shutdown_client(struct nfs_client
*clp
)
270 void nfs_cleanup_cb_ident_idr(struct net
*net
)
274 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
278 static void pnfs_init_server(struct nfs_server
*server
)
282 #endif /* CONFIG_NFS_V4 */
285 * Destroy a shared client record
287 static void nfs_free_client(struct nfs_client
*clp
)
289 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
291 nfs4_shutdown_client(clp
);
293 nfs_fscache_release_client_cookie(clp
);
295 /* -EIO all pending I/O */
296 if (!IS_ERR(clp
->cl_rpcclient
))
297 rpc_shutdown_client(clp
->cl_rpcclient
);
299 if (clp
->cl_machine_cred
!= NULL
)
300 put_rpccred(clp
->cl_machine_cred
);
302 nfs4_deviceid_purge_client(clp
);
304 kfree(clp
->cl_hostname
);
305 kfree(clp
->server_scope
);
308 dprintk("<-- nfs_free_client()\n");
312 * Release a reference to a shared client record
314 void nfs_put_client(struct nfs_client
*clp
)
319 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
321 if (atomic_dec_and_lock(&clp
->cl_count
, &nfs_client_lock
)) {
322 list_del(&clp
->cl_share_link
);
323 nfs_cb_idr_remove_locked(clp
);
324 spin_unlock(&nfs_client_lock
);
326 BUG_ON(!list_empty(&clp
->cl_superblocks
));
328 nfs_free_client(clp
);
331 EXPORT_SYMBOL_GPL(nfs_put_client
);
333 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
335 * Test if two ip6 socket addresses refer to the same socket by
336 * comparing relevant fields. The padding bytes specifically, are not
337 * compared. sin6_flowinfo is not compared because it only affects QoS
338 * and sin6_scope_id is only compared if the address is "link local"
339 * because "link local" addresses need only be unique to a specific
340 * link. Conversely, ordinary unicast addresses might have different
343 * The caller should ensure both socket addresses are AF_INET6.
345 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
346 const struct sockaddr
*sa2
)
348 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
349 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
351 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
353 else if (ipv6_addr_type(&sin1
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
354 return sin1
->sin6_scope_id
== sin2
->sin6_scope_id
;
358 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
359 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
360 const struct sockaddr
*sa2
)
367 * Test if two ip4 socket addresses refer to the same socket, by
368 * comparing relevant fields. The padding bytes specifically, are
371 * The caller should ensure both socket addresses are AF_INET.
373 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
374 const struct sockaddr
*sa2
)
376 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
377 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
379 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
382 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
383 const struct sockaddr
*sa2
)
385 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
386 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
388 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
389 (sin1
->sin6_port
== sin2
->sin6_port
);
392 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
393 const struct sockaddr
*sa2
)
395 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
396 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
398 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
399 (sin1
->sin_port
== sin2
->sin_port
);
403 * Test if two socket addresses represent the same actual socket,
404 * by comparing (only) relevant fields, excluding the port number.
406 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
407 const struct sockaddr
*sa2
)
409 if (sa1
->sa_family
!= sa2
->sa_family
)
412 switch (sa1
->sa_family
) {
414 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
416 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
422 * Test if two socket addresses represent the same actual socket,
423 * by comparing (only) relevant fields, including the port number.
425 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
426 const struct sockaddr
*sa2
)
428 if (sa1
->sa_family
!= sa2
->sa_family
)
431 switch (sa1
->sa_family
) {
433 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
435 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
440 /* Common match routine for v4.0 and v4.1 callback services */
442 nfs4_cb_match_client(const struct sockaddr
*addr
, struct nfs_client
*clp
,
445 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
447 /* Don't match clients that failed to initialise */
448 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
449 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
452 /* Match the version and minorversion */
453 if (clp
->rpc_ops
->version
!= 4 ||
454 clp
->cl_minorversion
!= minorversion
)
457 /* Match only the IP address, not the port number */
458 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
465 * Find an nfs_client on the list that matches the initialisation data
468 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
470 struct nfs_client
*clp
;
471 const struct sockaddr
*sap
= data
->addr
;
472 struct nfs_net
*nn
= net_generic(data
->net
, nfs_net_id
);
474 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
475 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
476 /* Don't match clients that failed to initialise properly */
477 if (clp
->cl_cons_state
< 0)
480 /* Different NFS versions cannot share the same nfs_client */
481 if (clp
->rpc_ops
!= data
->rpc_ops
)
484 if (clp
->cl_proto
!= data
->proto
)
486 /* Match nfsv4 minorversion */
487 if (clp
->cl_minorversion
!= data
->minorversion
)
489 /* Match the full socket address */
490 if (!nfs_sockaddr_cmp(sap
, clap
))
493 atomic_inc(&clp
->cl_count
);
500 * Look up a client by IP address and protocol version
501 * - creates a new record if one doesn't yet exist
503 static struct nfs_client
*
504 nfs_get_client(const struct nfs_client_initdata
*cl_init
,
505 const struct rpc_timeout
*timeparms
,
507 rpc_authflavor_t authflavour
,
510 struct nfs_client
*clp
, *new = NULL
;
512 struct nfs_net
*nn
= net_generic(cl_init
->net
, nfs_net_id
);
514 dprintk("--> nfs_get_client(%s,v%u)\n",
515 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
517 /* see if the client already exists */
519 spin_lock(&nfs_client_lock
);
521 clp
= nfs_match_client(cl_init
);
527 spin_unlock(&nfs_client_lock
);
529 new = nfs_alloc_client(cl_init
);
530 } while (!IS_ERR(new));
532 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
535 /* install a new client and return with it unready */
538 list_add(&clp
->cl_share_link
, &nn
->nfs_client_list
);
539 spin_unlock(&nfs_client_lock
);
541 error
= cl_init
->rpc_ops
->init_client(clp
, timeparms
, ip_addr
,
542 authflavour
, noresvport
);
545 return ERR_PTR(error
);
547 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
550 /* found an existing client
551 * - make sure it's ready before returning
554 spin_unlock(&nfs_client_lock
);
557 nfs_free_client(new);
559 error
= wait_event_killable(nfs_client_active_wq
,
560 clp
->cl_cons_state
< NFS_CS_INITING
);
563 return ERR_PTR(-ERESTARTSYS
);
566 if (clp
->cl_cons_state
< NFS_CS_READY
) {
567 error
= clp
->cl_cons_state
;
569 return ERR_PTR(error
);
572 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
574 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
579 * Mark a server as ready or failed
581 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
583 clp
->cl_cons_state
= state
;
584 wake_up_all(&nfs_client_active_wq
);
588 * With sessions, the client is not marked ready until after a
589 * successful EXCHANGE_ID and CREATE_SESSION.
591 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
592 * other versions of NFS can be tried.
594 int nfs4_check_client_ready(struct nfs_client
*clp
)
596 if (!nfs4_has_session(clp
))
598 if (clp
->cl_cons_state
< NFS_CS_READY
)
599 return -EPROTONOSUPPORT
;
604 * Initialise the timeout values for a connection
606 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
607 unsigned int timeo
, unsigned int retrans
)
609 to
->to_initval
= timeo
* HZ
/ 10;
610 to
->to_retries
= retrans
;
613 case XPRT_TRANSPORT_TCP
:
614 case XPRT_TRANSPORT_RDMA
:
615 if (to
->to_retries
== 0)
616 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
617 if (to
->to_initval
== 0)
618 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
619 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
620 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
621 to
->to_increment
= to
->to_initval
;
622 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
623 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
624 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
625 if (to
->to_maxval
< to
->to_initval
)
626 to
->to_maxval
= to
->to_initval
;
627 to
->to_exponential
= 0;
629 case XPRT_TRANSPORT_UDP
:
630 if (to
->to_retries
== 0)
631 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
633 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
634 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
635 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
636 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
637 to
->to_exponential
= 1;
645 * Create an RPC client handle
647 static int nfs_create_rpc_client(struct nfs_client
*clp
,
648 const struct rpc_timeout
*timeparms
,
649 rpc_authflavor_t flavor
,
650 int discrtry
, int noresvport
)
652 struct rpc_clnt
*clnt
= NULL
;
653 struct rpc_create_args args
= {
655 .protocol
= clp
->cl_proto
,
656 .address
= (struct sockaddr
*)&clp
->cl_addr
,
657 .addrsize
= clp
->cl_addrlen
,
658 .timeout
= timeparms
,
659 .servername
= clp
->cl_hostname
,
660 .program
= &nfs_program
,
661 .version
= clp
->rpc_ops
->version
,
662 .authflavor
= flavor
,
666 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
668 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
670 if (!IS_ERR(clp
->cl_rpcclient
))
673 clnt
= rpc_create(&args
);
675 dprintk("%s: cannot create RPC client. Error = %ld\n",
676 __func__
, PTR_ERR(clnt
));
677 return PTR_ERR(clnt
);
680 clp
->cl_rpcclient
= clnt
;
685 * Version 2 or 3 client destruction
687 static void nfs_destroy_server(struct nfs_server
*server
)
689 if (!(server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) ||
690 !(server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
691 nlmclnt_done(server
->nlm_host
);
695 * Version 2 or 3 lockd setup
697 static int nfs_start_lockd(struct nfs_server
*server
)
699 struct nlm_host
*host
;
700 struct nfs_client
*clp
= server
->nfs_client
;
701 struct nlmclnt_initdata nlm_init
= {
702 .hostname
= clp
->cl_hostname
,
703 .address
= (struct sockaddr
*)&clp
->cl_addr
,
704 .addrlen
= clp
->cl_addrlen
,
705 .nfs_version
= clp
->rpc_ops
->version
,
706 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
710 if (nlm_init
.nfs_version
> 3)
712 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
713 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
716 switch (clp
->cl_proto
) {
718 nlm_init
.protocol
= IPPROTO_TCP
;
720 case XPRT_TRANSPORT_UDP
:
721 nlm_init
.protocol
= IPPROTO_UDP
;
724 host
= nlmclnt_init(&nlm_init
);
726 return PTR_ERR(host
);
728 server
->nlm_host
= host
;
729 server
->destroy
= nfs_destroy_server
;
734 * Initialise an NFSv3 ACL client connection
736 #ifdef CONFIG_NFS_V3_ACL
737 static void nfs_init_server_aclclient(struct nfs_server
*server
)
739 if (server
->nfs_client
->rpc_ops
->version
!= 3)
741 if (server
->flags
& NFS_MOUNT_NOACL
)
744 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
745 if (IS_ERR(server
->client_acl
))
748 /* No errors! Assume that Sun nfsacls are supported */
749 server
->caps
|= NFS_CAP_ACLS
;
753 server
->caps
&= ~NFS_CAP_ACLS
;
756 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
758 server
->flags
&= ~NFS_MOUNT_NOACL
;
759 server
->caps
&= ~NFS_CAP_ACLS
;
764 * Create a general RPC client
766 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
767 const struct rpc_timeout
*timeo
,
768 rpc_authflavor_t pseudoflavour
)
770 struct nfs_client
*clp
= server
->nfs_client
;
772 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
773 if (IS_ERR(server
->client
)) {
774 dprintk("%s: couldn't create rpc_client!\n", __func__
);
775 return PTR_ERR(server
->client
);
778 memcpy(&server
->client
->cl_timeout_default
,
780 sizeof(server
->client
->cl_timeout_default
));
781 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
783 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
784 struct rpc_auth
*auth
;
786 auth
= rpcauth_create(pseudoflavour
, server
->client
);
788 dprintk("%s: couldn't create credcache!\n", __func__
);
789 return PTR_ERR(auth
);
792 server
->client
->cl_softrtry
= 0;
793 if (server
->flags
& NFS_MOUNT_SOFT
)
794 server
->client
->cl_softrtry
= 1;
800 * Initialise an NFS2 or NFS3 client
802 int nfs_init_client(struct nfs_client
*clp
, const struct rpc_timeout
*timeparms
,
803 const char *ip_addr
, rpc_authflavor_t authflavour
,
808 if (clp
->cl_cons_state
== NFS_CS_READY
) {
809 /* the client is already initialised */
810 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
815 * Create a client RPC handle for doing FSSTAT with UNIX auth only
816 * - RFC 2623, sec 2.3.2
818 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
,
822 nfs_mark_client_ready(clp
, NFS_CS_READY
);
826 nfs_mark_client_ready(clp
, error
);
827 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
832 * Create a version 2 or 3 client
834 static int nfs_init_server(struct nfs_server
*server
,
835 const struct nfs_parsed_mount_data
*data
)
837 struct nfs_client_initdata cl_init
= {
838 .hostname
= data
->nfs_server
.hostname
,
839 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
840 .addrlen
= data
->nfs_server
.addrlen
,
841 .rpc_ops
= &nfs_v2_clientops
,
842 .proto
= data
->nfs_server
.protocol
,
845 struct rpc_timeout timeparms
;
846 struct nfs_client
*clp
;
849 dprintk("--> nfs_init_server()\n");
852 if (data
->version
== 3)
853 cl_init
.rpc_ops
= &nfs_v3_clientops
;
856 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
857 data
->timeo
, data
->retrans
);
859 /* Allocate or find a client reference we can use */
860 clp
= nfs_get_client(&cl_init
, &timeparms
, NULL
, RPC_AUTH_UNIX
,
861 data
->flags
& NFS_MOUNT_NORESVPORT
);
863 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
867 server
->nfs_client
= clp
;
869 /* Initialise the client representation from the mount data */
870 server
->flags
= data
->flags
;
871 server
->options
= data
->options
;
872 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
873 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
874 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
;
877 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
879 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
881 server
->acregmin
= data
->acregmin
* HZ
;
882 server
->acregmax
= data
->acregmax
* HZ
;
883 server
->acdirmin
= data
->acdirmin
* HZ
;
884 server
->acdirmax
= data
->acdirmax
* HZ
;
886 /* Start lockd here, before we might error out */
887 error
= nfs_start_lockd(server
);
891 server
->port
= data
->nfs_server
.port
;
893 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
897 /* Preserve the values of mount_server-related mount options */
898 if (data
->mount_server
.addrlen
) {
899 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
900 data
->mount_server
.addrlen
);
901 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
903 server
->mountd_version
= data
->mount_server
.version
;
904 server
->mountd_port
= data
->mount_server
.port
;
905 server
->mountd_protocol
= data
->mount_server
.protocol
;
907 server
->namelen
= data
->namlen
;
908 /* Create a client RPC handle for the NFSv3 ACL management interface */
909 nfs_init_server_aclclient(server
);
910 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
914 server
->nfs_client
= NULL
;
916 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
921 * Load up the server record from information gained in an fsinfo record
923 static void nfs_server_set_fsinfo(struct nfs_server
*server
,
924 struct nfs_fh
*mntfh
,
925 struct nfs_fsinfo
*fsinfo
)
927 unsigned long max_rpc_payload
;
929 /* Work out a lot of parameters */
930 if (server
->rsize
== 0)
931 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
932 if (server
->wsize
== 0)
933 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
935 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
936 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
937 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
938 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
940 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
941 if (server
->rsize
> max_rpc_payload
)
942 server
->rsize
= max_rpc_payload
;
943 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
944 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
945 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
947 server
->backing_dev_info
.name
= "nfs";
948 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
950 if (server
->wsize
> max_rpc_payload
)
951 server
->wsize
= max_rpc_payload
;
952 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
953 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
954 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
955 server
->pnfs_blksize
= fsinfo
->blksize
;
956 set_pnfs_layoutdriver(server
, mntfh
, fsinfo
->layouttype
);
958 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
960 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
961 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
962 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
963 if (server
->dtsize
> server
->rsize
)
964 server
->dtsize
= server
->rsize
;
966 if (server
->flags
& NFS_MOUNT_NOAC
) {
967 server
->acregmin
= server
->acregmax
= 0;
968 server
->acdirmin
= server
->acdirmax
= 0;
971 server
->maxfilesize
= fsinfo
->maxfilesize
;
973 server
->time_delta
= fsinfo
->time_delta
;
975 /* We're airborne Set socket buffersize */
976 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
980 * Probe filesystem information, including the FSID on v2/v3
982 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
984 struct nfs_fsinfo fsinfo
;
985 struct nfs_client
*clp
= server
->nfs_client
;
988 dprintk("--> nfs_probe_fsinfo()\n");
990 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
991 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
996 fsinfo
.fattr
= fattr
;
997 fsinfo
.layouttype
= 0;
998 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
1002 nfs_server_set_fsinfo(server
, mntfh
, &fsinfo
);
1004 /* Get some general file system info */
1005 if (server
->namelen
== 0) {
1006 struct nfs_pathconf pathinfo
;
1008 pathinfo
.fattr
= fattr
;
1009 nfs_fattr_init(fattr
);
1011 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
1012 server
->namelen
= pathinfo
.max_namelen
;
1015 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1019 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
1024 * Copy useful information when duplicating a server record
1026 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
1028 target
->flags
= source
->flags
;
1029 target
->rsize
= source
->rsize
;
1030 target
->wsize
= source
->wsize
;
1031 target
->acregmin
= source
->acregmin
;
1032 target
->acregmax
= source
->acregmax
;
1033 target
->acdirmin
= source
->acdirmin
;
1034 target
->acdirmax
= source
->acdirmax
;
1035 target
->caps
= source
->caps
;
1036 target
->options
= source
->options
;
1039 static void nfs_server_insert_lists(struct nfs_server
*server
)
1041 struct nfs_client
*clp
= server
->nfs_client
;
1042 struct nfs_net
*nn
= net_generic(clp
->net
, nfs_net_id
);
1044 spin_lock(&nfs_client_lock
);
1045 list_add_tail_rcu(&server
->client_link
, &clp
->cl_superblocks
);
1046 list_add_tail(&server
->master_link
, &nn
->nfs_volume_list
);
1047 clear_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1048 spin_unlock(&nfs_client_lock
);
1052 static void nfs_server_remove_lists(struct nfs_server
*server
)
1054 struct nfs_client
*clp
= server
->nfs_client
;
1056 spin_lock(&nfs_client_lock
);
1057 list_del_rcu(&server
->client_link
);
1058 if (clp
&& list_empty(&clp
->cl_superblocks
))
1059 set_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1060 list_del(&server
->master_link
);
1061 spin_unlock(&nfs_client_lock
);
1067 * Allocate and initialise a server record
1069 static struct nfs_server
*nfs_alloc_server(void)
1071 struct nfs_server
*server
;
1073 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1077 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
1079 /* Zero out the NFS state stuff */
1080 INIT_LIST_HEAD(&server
->client_link
);
1081 INIT_LIST_HEAD(&server
->master_link
);
1082 INIT_LIST_HEAD(&server
->delegations
);
1083 INIT_LIST_HEAD(&server
->layouts
);
1084 INIT_LIST_HEAD(&server
->state_owners_lru
);
1086 atomic_set(&server
->active
, 0);
1088 server
->io_stats
= nfs_alloc_iostats();
1089 if (!server
->io_stats
) {
1094 if (bdi_init(&server
->backing_dev_info
)) {
1095 nfs_free_iostats(server
->io_stats
);
1100 ida_init(&server
->openowner_id
);
1101 ida_init(&server
->lockowner_id
);
1102 pnfs_init_server(server
);
1108 * Free up a server record
1110 void nfs_free_server(struct nfs_server
*server
)
1112 dprintk("--> nfs_free_server()\n");
1114 nfs_server_remove_lists(server
);
1115 unset_pnfs_layoutdriver(server
);
1117 if (server
->destroy
!= NULL
)
1118 server
->destroy(server
);
1120 if (!IS_ERR(server
->client_acl
))
1121 rpc_shutdown_client(server
->client_acl
);
1122 if (!IS_ERR(server
->client
))
1123 rpc_shutdown_client(server
->client
);
1125 nfs_put_client(server
->nfs_client
);
1127 ida_destroy(&server
->lockowner_id
);
1128 ida_destroy(&server
->openowner_id
);
1129 nfs_free_iostats(server
->io_stats
);
1130 bdi_destroy(&server
->backing_dev_info
);
1132 nfs_release_automount_timer();
1133 dprintk("<-- nfs_free_server()\n");
1137 * Create a version 2 or 3 volume record
1138 * - keyed on server and FSID
1140 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1141 struct nfs_fh
*mntfh
)
1143 struct nfs_server
*server
;
1144 struct nfs_fattr
*fattr
;
1147 server
= nfs_alloc_server();
1149 return ERR_PTR(-ENOMEM
);
1152 fattr
= nfs_alloc_fattr();
1156 /* Get a client representation */
1157 error
= nfs_init_server(server
, data
);
1161 BUG_ON(!server
->nfs_client
);
1162 BUG_ON(!server
->nfs_client
->rpc_ops
);
1163 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1165 /* Probe the root fh to retrieve its FSID */
1166 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1169 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1170 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1171 server
->namelen
= NFS3_MAXNAMLEN
;
1172 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1173 server
->caps
|= NFS_CAP_READDIRPLUS
;
1175 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1176 server
->namelen
= NFS2_MAXNAMLEN
;
1179 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1180 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, fattr
);
1182 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1186 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1188 dprintk("Server FSID: %llx:%llx\n",
1189 (unsigned long long) server
->fsid
.major
,
1190 (unsigned long long) server
->fsid
.minor
);
1192 nfs_server_insert_lists(server
);
1193 server
->mount_time
= jiffies
;
1194 nfs_free_fattr(fattr
);
1198 nfs_free_fattr(fattr
);
1199 nfs_free_server(server
);
1200 return ERR_PTR(error
);
1203 #ifdef CONFIG_NFS_V4
1205 * NFSv4.0 callback thread helper
1207 * Find a client by callback identifier
1210 nfs4_find_client_ident(struct net
*net
, int cb_ident
)
1212 struct nfs_client
*clp
;
1213 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1215 spin_lock(&nfs_client_lock
);
1216 clp
= idr_find(&nn
->cb_ident_idr
, cb_ident
);
1218 atomic_inc(&clp
->cl_count
);
1219 spin_unlock(&nfs_client_lock
);
1223 #if defined(CONFIG_NFS_V4_1)
1225 * NFSv4.1 callback thread helper
1226 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1227 * minorversion, and sessionID
1229 * Returns NULL if no such client
1232 nfs4_find_client_sessionid(const struct sockaddr
*addr
,
1233 struct nfs4_sessionid
*sid
)
1235 struct nfs_client
*clp
;
1236 struct nfs_net
*nn
= net_generic(&init_net
, nfs_net_id
);
1238 spin_lock(&nfs_client_lock
);
1239 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
1240 if (nfs4_cb_match_client(addr
, clp
, 1) == false)
1243 if (!nfs4_has_session(clp
))
1246 /* Match sessionid*/
1247 if (memcmp(clp
->cl_session
->sess_id
.data
,
1248 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
1251 atomic_inc(&clp
->cl_count
);
1252 spin_unlock(&nfs_client_lock
);
1255 spin_unlock(&nfs_client_lock
);
1259 #else /* CONFIG_NFS_V4_1 */
1262 nfs4_find_client_sessionid(const struct sockaddr
*addr
,
1263 struct nfs4_sessionid
*sid
)
1267 #endif /* CONFIG_NFS_V4_1 */
1270 * Initialize the NFS4 callback service
1272 static int nfs4_init_callback(struct nfs_client
*clp
)
1276 if (clp
->rpc_ops
->version
== 4) {
1277 if (nfs4_has_session(clp
)) {
1278 error
= xprt_setup_backchannel(
1279 clp
->cl_rpcclient
->cl_xprt
,
1280 NFS41_BC_MIN_CALLBACKS
);
1285 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
,
1286 clp
->cl_rpcclient
->cl_xprt
);
1288 dprintk("%s: failed to start callback. Error = %d\n",
1292 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
1298 * Initialize the minor version specific parts of an NFS4 client record
1300 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
1302 #if defined(CONFIG_NFS_V4_1)
1303 if (clp
->cl_mvops
->minor_version
) {
1304 struct nfs4_session
*session
= NULL
;
1306 * Create the session and mark it expired.
1307 * When a SEQUENCE operation encounters the expired session
1308 * it will do session recovery to initialize it.
1310 session
= nfs4_alloc_session(clp
);
1314 clp
->cl_session
= session
;
1316 * The create session reply races with the server back
1317 * channel probe. Mark the client NFS_CS_SESSION_INITING
1318 * so that the client back channel can find the
1321 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
1323 #endif /* CONFIG_NFS_V4_1 */
1325 return nfs4_init_callback(clp
);
1329 * Initialise an NFS4 client record
1331 int nfs4_init_client(struct nfs_client
*clp
,
1332 const struct rpc_timeout
*timeparms
,
1333 const char *ip_addr
,
1334 rpc_authflavor_t authflavour
,
1339 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1340 /* the client is initialised already */
1341 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1345 /* Check NFS protocol revision and initialize RPC op vector */
1346 clp
->rpc_ops
= &nfs_v4_clientops
;
1348 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
,
1352 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1354 error
= nfs_idmap_new(clp
);
1356 dprintk("%s: failed to create idmapper. Error = %d\n",
1360 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1362 error
= nfs4_init_client_minor_version(clp
);
1366 if (!nfs4_has_session(clp
))
1367 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1371 nfs_mark_client_ready(clp
, error
);
1372 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1377 * Set up an NFS4 client
1379 static int nfs4_set_client(struct nfs_server
*server
,
1380 const char *hostname
,
1381 const struct sockaddr
*addr
,
1382 const size_t addrlen
,
1383 const char *ip_addr
,
1384 rpc_authflavor_t authflavour
,
1385 int proto
, const struct rpc_timeout
*timeparms
,
1386 u32 minorversion
, struct net
*net
)
1388 struct nfs_client_initdata cl_init
= {
1389 .hostname
= hostname
,
1392 .rpc_ops
= &nfs_v4_clientops
,
1394 .minorversion
= minorversion
,
1397 struct nfs_client
*clp
;
1400 dprintk("--> nfs4_set_client()\n");
1402 /* Allocate or find a client reference we can use */
1403 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
,
1404 server
->flags
& NFS_MOUNT_NORESVPORT
);
1406 error
= PTR_ERR(clp
);
1411 * Query for the lease time on clientid setup or renewal
1413 * Note that this will be set on nfs_clients that were created
1414 * only for the DS role and did not set this bit, but now will
1415 * serve a dual role.
1417 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
1419 server
->nfs_client
= clp
;
1420 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1423 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1428 * Set up a pNFS Data Server client.
1430 * Return any existing nfs_client that matches server address,port,version
1433 * For a new nfs_client, use a soft mount (default), a low retrans and a
1434 * low timeout interval so that if a connection is lost, we retry through
1437 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
1438 const struct sockaddr
*ds_addr
,
1439 int ds_addrlen
, int ds_proto
)
1441 struct nfs_client_initdata cl_init
= {
1443 .addrlen
= ds_addrlen
,
1444 .rpc_ops
= &nfs_v4_clientops
,
1446 .minorversion
= mds_clp
->cl_minorversion
,
1447 .net
= mds_clp
->net
,
1449 struct rpc_timeout ds_timeout
= {
1450 .to_initval
= 15 * HZ
,
1451 .to_maxval
= 15 * HZ
,
1453 .to_exponential
= 1,
1455 struct nfs_client
*clp
;
1458 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1459 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1460 * (section 13.1 RFC 5661).
1462 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
1463 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
, 0);
1465 dprintk("<-- %s %p\n", __func__
, clp
);
1468 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
1471 * Session has been established, and the client marked ready.
1472 * Set the mount rsize and wsize with negotiated fore channel
1473 * attributes which will be bound checked in nfs_server_set_fsinfo.
1475 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1477 #ifdef CONFIG_NFS_V4_1
1478 struct nfs4_session
*sess
;
1482 if (!nfs4_has_session(server
->nfs_client
))
1484 sess
= server
->nfs_client
->cl_session
;
1485 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
1486 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
1488 if (server
->rsize
> server_resp_sz
)
1489 server
->rsize
= server_resp_sz
;
1490 if (server
->wsize
> server_rqst_sz
)
1491 server
->wsize
= server_rqst_sz
;
1492 #endif /* CONFIG_NFS_V4_1 */
1495 static int nfs4_server_common_setup(struct nfs_server
*server
,
1496 struct nfs_fh
*mntfh
)
1498 struct nfs_fattr
*fattr
;
1501 BUG_ON(!server
->nfs_client
);
1502 BUG_ON(!server
->nfs_client
->rpc_ops
);
1503 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1505 /* data servers support only a subset of NFSv4.1 */
1506 if (is_ds_only_client(server
->nfs_client
))
1507 return -EPROTONOSUPPORT
;
1509 fattr
= nfs_alloc_fattr();
1513 /* We must ensure the session is initialised first */
1514 error
= nfs4_init_session(server
);
1518 /* Probe the root fh to retrieve its FSID and filehandle */
1519 error
= nfs4_get_rootfh(server
, mntfh
);
1523 dprintk("Server FSID: %llx:%llx\n",
1524 (unsigned long long) server
->fsid
.major
,
1525 (unsigned long long) server
->fsid
.minor
);
1526 dprintk("Mount FH: %d\n", mntfh
->size
);
1528 nfs4_session_set_rwsize(server
);
1530 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1534 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1535 server
->namelen
= NFS4_MAXNAMLEN
;
1537 nfs_server_insert_lists(server
);
1538 server
->mount_time
= jiffies
;
1539 server
->destroy
= nfs4_destroy_server
;
1541 nfs_free_fattr(fattr
);
1546 * Create a version 4 volume record
1548 static int nfs4_init_server(struct nfs_server
*server
,
1549 const struct nfs_parsed_mount_data
*data
)
1551 struct rpc_timeout timeparms
;
1554 dprintk("--> nfs4_init_server()\n");
1556 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1557 data
->timeo
, data
->retrans
);
1559 /* Initialise the client representation from the mount data */
1560 server
->flags
= data
->flags
;
1561 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
|NFS_CAP_POSIX_LOCK
;
1562 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1563 server
->caps
|= NFS_CAP_READDIRPLUS
;
1564 server
->options
= data
->options
;
1566 /* Get a client record */
1567 error
= nfs4_set_client(server
,
1568 data
->nfs_server
.hostname
,
1569 (const struct sockaddr
*)&data
->nfs_server
.address
,
1570 data
->nfs_server
.addrlen
,
1571 data
->client_address
,
1572 data
->auth_flavors
[0],
1573 data
->nfs_server
.protocol
,
1581 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1584 if (nfs4_disable_idmapping
&& data
->auth_flavors
[0] == RPC_AUTH_UNIX
)
1585 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
1588 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1590 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1592 server
->acregmin
= data
->acregmin
* HZ
;
1593 server
->acregmax
= data
->acregmax
* HZ
;
1594 server
->acdirmin
= data
->acdirmin
* HZ
;
1595 server
->acdirmax
= data
->acdirmax
* HZ
;
1597 server
->port
= data
->nfs_server
.port
;
1599 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1603 dprintk("<-- nfs4_init_server() = %d\n", error
);
1608 * Create a version 4 volume record
1609 * - keyed on server and FSID
1611 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1612 struct nfs_fh
*mntfh
)
1614 struct nfs_server
*server
;
1617 dprintk("--> nfs4_create_server()\n");
1619 server
= nfs_alloc_server();
1621 return ERR_PTR(-ENOMEM
);
1623 /* set up the general RPC client */
1624 error
= nfs4_init_server(server
, data
);
1628 error
= nfs4_server_common_setup(server
, mntfh
);
1632 dprintk("<-- nfs4_create_server() = %p\n", server
);
1636 nfs_free_server(server
);
1637 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1638 return ERR_PTR(error
);
1642 * Create an NFS4 referral server record
1644 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1645 struct nfs_fh
*mntfh
)
1647 struct nfs_client
*parent_client
;
1648 struct nfs_server
*server
, *parent_server
;
1651 dprintk("--> nfs4_create_referral_server()\n");
1653 server
= nfs_alloc_server();
1655 return ERR_PTR(-ENOMEM
);
1657 parent_server
= NFS_SB(data
->sb
);
1658 parent_client
= parent_server
->nfs_client
;
1660 /* Initialise the client representation from the parent server */
1661 nfs_server_copy_userdata(server
, parent_server
);
1662 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1664 /* Get a client representation.
1665 * Note: NFSv4 always uses TCP, */
1666 error
= nfs4_set_client(server
, data
->hostname
,
1669 parent_client
->cl_ipaddr
,
1671 parent_server
->client
->cl_xprt
->prot
,
1672 parent_server
->client
->cl_timeout
,
1673 parent_client
->cl_mvops
->minor_version
,
1674 parent_client
->net
);
1678 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1682 error
= nfs4_server_common_setup(server
, mntfh
);
1686 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1690 nfs_free_server(server
);
1691 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1692 return ERR_PTR(error
);
1695 #endif /* CONFIG_NFS_V4 */
1698 * Clone an NFS2, NFS3 or NFS4 server record
1700 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1702 struct nfs_fattr
*fattr
)
1704 struct nfs_server
*server
;
1705 struct nfs_fattr
*fattr_fsinfo
;
1708 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1709 (unsigned long long) fattr
->fsid
.major
,
1710 (unsigned long long) fattr
->fsid
.minor
);
1712 server
= nfs_alloc_server();
1714 return ERR_PTR(-ENOMEM
);
1717 fattr_fsinfo
= nfs_alloc_fattr();
1718 if (fattr_fsinfo
== NULL
)
1719 goto out_free_server
;
1721 /* Copy data from the source */
1722 server
->nfs_client
= source
->nfs_client
;
1723 server
->destroy
= source
->destroy
;
1724 atomic_inc(&server
->nfs_client
->cl_count
);
1725 nfs_server_copy_userdata(server
, source
);
1727 server
->fsid
= fattr
->fsid
;
1729 error
= nfs_init_server_rpcclient(server
,
1730 source
->client
->cl_timeout
,
1731 source
->client
->cl_auth
->au_flavor
);
1733 goto out_free_server
;
1734 if (!IS_ERR(source
->client_acl
))
1735 nfs_init_server_aclclient(server
);
1737 /* probe the filesystem info for this server filesystem */
1738 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1740 goto out_free_server
;
1742 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1743 server
->namelen
= NFS4_MAXNAMLEN
;
1745 dprintk("Cloned FSID: %llx:%llx\n",
1746 (unsigned long long) server
->fsid
.major
,
1747 (unsigned long long) server
->fsid
.minor
);
1749 error
= nfs_start_lockd(server
);
1751 goto out_free_server
;
1753 nfs_server_insert_lists(server
);
1754 server
->mount_time
= jiffies
;
1756 nfs_free_fattr(fattr_fsinfo
);
1757 dprintk("<-- nfs_clone_server() = %p\n", server
);
1761 nfs_free_fattr(fattr_fsinfo
);
1762 nfs_free_server(server
);
1763 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1764 return ERR_PTR(error
);
1767 void nfs_clients_init(struct net
*net
)
1769 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1771 INIT_LIST_HEAD(&nn
->nfs_client_list
);
1772 INIT_LIST_HEAD(&nn
->nfs_volume_list
);
1773 #ifdef CONFIG_NFS_V4
1774 idr_init(&nn
->cb_ident_idr
);
1778 #ifdef CONFIG_PROC_FS
1779 static struct proc_dir_entry
*proc_fs_nfs
;
1781 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1782 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1783 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1784 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1785 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1787 static const struct seq_operations nfs_server_list_ops
= {
1788 .start
= nfs_server_list_start
,
1789 .next
= nfs_server_list_next
,
1790 .stop
= nfs_server_list_stop
,
1791 .show
= nfs_server_list_show
,
1794 static const struct file_operations nfs_server_list_fops
= {
1795 .open
= nfs_server_list_open
,
1797 .llseek
= seq_lseek
,
1798 .release
= seq_release
,
1799 .owner
= THIS_MODULE
,
1802 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1803 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1804 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1805 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1806 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1808 static const struct seq_operations nfs_volume_list_ops
= {
1809 .start
= nfs_volume_list_start
,
1810 .next
= nfs_volume_list_next
,
1811 .stop
= nfs_volume_list_stop
,
1812 .show
= nfs_volume_list_show
,
1815 static const struct file_operations nfs_volume_list_fops
= {
1816 .open
= nfs_volume_list_open
,
1818 .llseek
= seq_lseek
,
1819 .release
= seq_release
,
1820 .owner
= THIS_MODULE
,
1824 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1827 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1831 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1832 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1834 ret
= seq_open(file
, &nfs_server_list_ops
);
1838 m
= file
->private_data
;
1845 * set up the iterator to start reading from the server list and return the first item
1847 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1849 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1851 /* lock the list against modification */
1852 spin_lock(&nfs_client_lock
);
1853 return seq_list_start_head(&nn
->nfs_client_list
, *_pos
);
1857 * move to next server
1859 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1861 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1863 return seq_list_next(v
, &nn
->nfs_client_list
, pos
);
1867 * clean up after reading from the transports list
1869 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1871 spin_unlock(&nfs_client_lock
);
1875 * display a header line followed by a load of call lines
1877 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1879 struct nfs_client
*clp
;
1880 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1882 /* display header on line 1 */
1883 if (v
== &nn
->nfs_client_list
) {
1884 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1888 /* display one transport per line on subsequent lines */
1889 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1891 /* Check if the client is initialized */
1892 if (clp
->cl_cons_state
!= NFS_CS_READY
)
1895 seq_printf(m
, "v%u %s %s %3d %s\n",
1896 clp
->rpc_ops
->version
,
1897 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1898 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1899 atomic_read(&clp
->cl_count
),
1906 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1908 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1912 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1913 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1915 ret
= seq_open(file
, &nfs_volume_list_ops
);
1919 m
= file
->private_data
;
1926 * set up the iterator to start reading from the volume list and return the first item
1928 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1930 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1932 /* lock the list against modification */
1933 spin_lock(&nfs_client_lock
);
1934 return seq_list_start_head(&nn
->nfs_volume_list
, *_pos
);
1938 * move to next volume
1940 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1942 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1944 return seq_list_next(v
, &nn
->nfs_volume_list
, pos
);
1948 * clean up after reading from the transports list
1950 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1952 spin_unlock(&nfs_client_lock
);
1956 * display a header line followed by a load of call lines
1958 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1960 struct nfs_server
*server
;
1961 struct nfs_client
*clp
;
1962 char dev
[8], fsid
[17];
1963 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1965 /* display header on line 1 */
1966 if (v
== &nn
->nfs_volume_list
) {
1967 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1970 /* display one transport per line on subsequent lines */
1971 server
= list_entry(v
, struct nfs_server
, master_link
);
1972 clp
= server
->nfs_client
;
1974 snprintf(dev
, 8, "%u:%u",
1975 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1977 snprintf(fsid
, 17, "%llx:%llx",
1978 (unsigned long long) server
->fsid
.major
,
1979 (unsigned long long) server
->fsid
.minor
);
1981 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1982 clp
->rpc_ops
->version
,
1983 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1984 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1987 nfs_server_fscache_state(server
));
1993 * initialise the /proc/fs/nfsfs/ directory
1995 int __init
nfs_fs_proc_init(void)
1997 struct proc_dir_entry
*p
;
1999 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
2003 /* a file of servers with which we're dealing */
2004 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
2005 proc_fs_nfs
, &nfs_server_list_fops
);
2009 /* a file of volumes that we have mounted */
2010 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
2011 proc_fs_nfs
, &nfs_volume_list_fops
);
2017 remove_proc_entry("servers", proc_fs_nfs
);
2019 remove_proc_entry("fs/nfsfs", NULL
);
2025 * clean up the /proc/fs/nfsfs/ directory
2027 void nfs_fs_proc_exit(void)
2029 remove_proc_entry("volumes", proc_fs_nfs
);
2030 remove_proc_entry("servers", proc_fs_nfs
);
2031 remove_proc_entry("fs/nfsfs", NULL
);
2034 #endif /* CONFIG_PROC_FS */
2036 module_param(nfs4_disable_idmapping
, bool, 0644);
2037 MODULE_PARM_DESC(nfs4_disable_idmapping
,
2038 "Turn off NFSv4 idmapping when using 'sec=sys'");