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>
39 #include <linux/idr.h>
41 #include <linux/nfs_xdr.h>
42 #include <linux/sunrpc/bc_xprt.h>
43 #include <linux/nsproxy.h>
44 #include <linux/pid_namespace.h>
49 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_CLIENT
58 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
62 * Get a unique NFSv4.0 callback identifier which will be used
63 * by the V4.0 callback service to lookup the nfs_client struct
65 static int nfs_get_cb_ident_idr(struct nfs_client
*clp
, int minorversion
)
68 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
70 if (clp
->rpc_ops
->version
!= 4 || minorversion
!= 0)
73 if (!idr_pre_get(&nn
->cb_ident_idr
, GFP_KERNEL
))
75 spin_lock(&nn
->nfs_client_lock
);
76 ret
= idr_get_new(&nn
->cb_ident_idr
, clp
, &clp
->cl_cb_ident
);
77 spin_unlock(&nn
->nfs_client_lock
);
82 #endif /* CONFIG_NFS_V4 */
85 * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
87 static bool nfs4_disable_idmapping
= true;
92 static const struct rpc_version
*nfs_version
[5] = {
104 const struct rpc_program nfs_program
= {
106 .number
= NFS_PROGRAM
,
107 .nrvers
= ARRAY_SIZE(nfs_version
),
108 .version
= nfs_version
,
109 .stats
= &nfs_rpcstat
,
110 .pipe_dir_name
= NFS_PIPE_DIRNAME
,
113 struct rpc_stat nfs_rpcstat
= {
114 .program
= &nfs_program
118 #ifdef CONFIG_NFS_V3_ACL
119 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
120 static const struct rpc_version
*nfsacl_version
[] = {
121 [3] = &nfsacl_version3
,
124 const struct rpc_program nfsacl_program
= {
126 .number
= NFS_ACL_PROGRAM
,
127 .nrvers
= ARRAY_SIZE(nfsacl_version
),
128 .version
= nfsacl_version
,
129 .stats
= &nfsacl_rpcstat
,
131 #endif /* CONFIG_NFS_V3_ACL */
133 struct nfs_client_initdata
{
134 unsigned long init_flags
;
135 const char *hostname
;
136 const struct sockaddr
*addr
;
138 const struct nfs_rpc_ops
*rpc_ops
;
145 * Allocate a shared client record
147 * Since these are allocated/deallocated very rarely, we don't
148 * bother putting them in a slab cache...
150 static struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
152 struct nfs_client
*clp
;
153 struct rpc_cred
*cred
;
156 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
159 clp
->rpc_ops
= cl_init
->rpc_ops
;
161 atomic_set(&clp
->cl_count
, 1);
162 clp
->cl_cons_state
= NFS_CS_INITING
;
164 memcpy(&clp
->cl_addr
, cl_init
->addr
, cl_init
->addrlen
);
165 clp
->cl_addrlen
= cl_init
->addrlen
;
167 if (cl_init
->hostname
) {
169 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
170 if (!clp
->cl_hostname
)
174 INIT_LIST_HEAD(&clp
->cl_superblocks
);
175 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
177 clp
->cl_proto
= cl_init
->proto
;
178 clp
->cl_net
= get_net(cl_init
->net
);
181 err
= nfs_get_cb_ident_idr(clp
, cl_init
->minorversion
);
185 spin_lock_init(&clp
->cl_lock
);
186 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
187 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
188 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
189 clp
->cl_minorversion
= cl_init
->minorversion
;
190 clp
->cl_mvops
= nfs_v4_minor_ops
[cl_init
->minorversion
];
192 cred
= rpc_lookup_machine_cred("*");
194 clp
->cl_machine_cred
= cred
;
195 nfs_fscache_get_client_cookie(clp
);
206 #ifdef CONFIG_NFS_V4_1
207 static void nfs4_shutdown_session(struct nfs_client
*clp
)
209 if (nfs4_has_session(clp
)) {
210 nfs4_destroy_session(clp
->cl_session
);
211 nfs4_destroy_clientid(clp
);
215 #else /* CONFIG_NFS_V4_1 */
216 static void nfs4_shutdown_session(struct nfs_client
*clp
)
219 #endif /* CONFIG_NFS_V4_1 */
222 * Destroy the NFS4 callback service
224 static void nfs4_destroy_callback(struct nfs_client
*clp
)
226 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
227 nfs_callback_down(clp
->cl_mvops
->minor_version
);
230 static void nfs4_shutdown_client(struct nfs_client
*clp
)
232 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
233 nfs4_kill_renewd(clp
);
234 nfs4_shutdown_session(clp
);
235 nfs4_destroy_callback(clp
);
236 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
237 nfs_idmap_delete(clp
);
239 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
240 kfree(clp
->cl_serverowner
);
241 kfree(clp
->cl_serverscope
);
242 kfree(clp
->cl_implid
);
245 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
246 void nfs_cleanup_cb_ident_idr(struct net
*net
)
248 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
250 idr_destroy(&nn
->cb_ident_idr
);
253 /* nfs_client_lock held */
254 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
256 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
258 if (clp
->cl_cb_ident
)
259 idr_remove(&nn
->cb_ident_idr
, clp
->cl_cb_ident
);
262 static void pnfs_init_server(struct nfs_server
*server
)
264 rpc_init_wait_queue(&server
->roc_rpcwaitq
, "pNFS ROC");
267 static void nfs4_destroy_server(struct nfs_server
*server
)
269 nfs4_purge_state_owners(server
);
273 static void nfs4_shutdown_client(struct nfs_client
*clp
)
277 void nfs_cleanup_cb_ident_idr(struct net
*net
)
281 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
285 static void pnfs_init_server(struct nfs_server
*server
)
289 #endif /* CONFIG_NFS_V4 */
292 * Destroy a shared client record
294 static void nfs_free_client(struct nfs_client
*clp
)
296 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
298 nfs4_shutdown_client(clp
);
300 nfs_fscache_release_client_cookie(clp
);
302 /* -EIO all pending I/O */
303 if (!IS_ERR(clp
->cl_rpcclient
))
304 rpc_shutdown_client(clp
->cl_rpcclient
);
306 if (clp
->cl_machine_cred
!= NULL
)
307 put_rpccred(clp
->cl_machine_cred
);
309 put_net(clp
->cl_net
);
310 kfree(clp
->cl_hostname
);
313 dprintk("<-- nfs_free_client()\n");
317 * Release a reference to a shared client record
319 void nfs_put_client(struct nfs_client
*clp
)
326 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
327 nn
= net_generic(clp
->cl_net
, nfs_net_id
);
329 if (atomic_dec_and_lock(&clp
->cl_count
, &nn
->nfs_client_lock
)) {
330 list_del(&clp
->cl_share_link
);
331 nfs_cb_idr_remove_locked(clp
);
332 spin_unlock(&nn
->nfs_client_lock
);
334 BUG_ON(!list_empty(&clp
->cl_superblocks
));
336 nfs_free_client(clp
);
339 EXPORT_SYMBOL_GPL(nfs_put_client
);
341 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
343 * Test if two ip6 socket addresses refer to the same socket by
344 * comparing relevant fields. The padding bytes specifically, are not
345 * compared. sin6_flowinfo is not compared because it only affects QoS
346 * and sin6_scope_id is only compared if the address is "link local"
347 * because "link local" addresses need only be unique to a specific
348 * link. Conversely, ordinary unicast addresses might have different
351 * The caller should ensure both socket addresses are AF_INET6.
353 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
354 const struct sockaddr
*sa2
)
356 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
357 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
359 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
361 else if (ipv6_addr_type(&sin1
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
362 return sin1
->sin6_scope_id
== sin2
->sin6_scope_id
;
366 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
367 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
368 const struct sockaddr
*sa2
)
375 * Test if two ip4 socket addresses refer to the same socket, by
376 * comparing relevant fields. The padding bytes specifically, are
379 * The caller should ensure both socket addresses are AF_INET.
381 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
382 const struct sockaddr
*sa2
)
384 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
385 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
387 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
390 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
391 const struct sockaddr
*sa2
)
393 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
394 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
396 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
397 (sin1
->sin6_port
== sin2
->sin6_port
);
400 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
401 const struct sockaddr
*sa2
)
403 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
404 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
406 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
407 (sin1
->sin_port
== sin2
->sin_port
);
410 #if defined(CONFIG_NFS_V4_1)
412 * Test if two socket addresses represent the same actual socket,
413 * by comparing (only) relevant fields, excluding the port number.
415 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
416 const struct sockaddr
*sa2
)
418 if (sa1
->sa_family
!= sa2
->sa_family
)
421 switch (sa1
->sa_family
) {
423 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
425 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
429 #endif /* CONFIG_NFS_V4_1 */
432 * Test if two socket addresses represent the same actual socket,
433 * by comparing (only) relevant fields, including the port number.
435 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
436 const struct sockaddr
*sa2
)
438 if (sa1
->sa_family
!= sa2
->sa_family
)
441 switch (sa1
->sa_family
) {
443 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
445 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
450 #if defined(CONFIG_NFS_V4_1)
451 /* Common match routine for v4.0 and v4.1 callback services */
452 static bool nfs4_cb_match_client(const struct sockaddr
*addr
,
453 struct nfs_client
*clp
, u32 minorversion
)
455 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
457 /* Don't match clients that failed to initialise */
458 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
459 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
464 /* Match the version and minorversion */
465 if (clp
->rpc_ops
->version
!= 4 ||
466 clp
->cl_minorversion
!= minorversion
)
469 /* Match only the IP address, not the port number */
470 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
475 #endif /* CONFIG_NFS_V4_1 */
478 * Find an nfs_client on the list that matches the initialisation data
481 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
483 struct nfs_client
*clp
;
484 const struct sockaddr
*sap
= data
->addr
;
485 struct nfs_net
*nn
= net_generic(data
->net
, nfs_net_id
);
487 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
488 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
489 /* Don't match clients that failed to initialise properly */
490 if (clp
->cl_cons_state
< 0)
493 /* Different NFS versions cannot share the same nfs_client */
494 if (clp
->rpc_ops
!= data
->rpc_ops
)
497 if (clp
->cl_proto
!= data
->proto
)
499 /* Match nfsv4 minorversion */
500 if (clp
->cl_minorversion
!= data
->minorversion
)
502 /* Match the full socket address */
503 if (!nfs_sockaddr_cmp(sap
, clap
))
506 atomic_inc(&clp
->cl_count
);
512 static bool nfs_client_init_is_complete(const struct nfs_client
*clp
)
514 return clp
->cl_cons_state
!= NFS_CS_INITING
;
517 int nfs_wait_client_init_complete(const struct nfs_client
*clp
)
519 return wait_event_killable(nfs_client_active_wq
,
520 nfs_client_init_is_complete(clp
));
524 * Found an existing client. Make sure it's ready before returning.
526 static struct nfs_client
*
527 nfs_found_client(const struct nfs_client_initdata
*cl_init
,
528 struct nfs_client
*clp
)
532 error
= nfs_wait_client_init_complete(clp
);
535 return ERR_PTR(-ERESTARTSYS
);
538 if (clp
->cl_cons_state
< NFS_CS_READY
) {
539 error
= clp
->cl_cons_state
;
541 return ERR_PTR(error
);
546 dprintk("<-- %s found nfs_client %p for %s\n",
547 __func__
, clp
, cl_init
->hostname
?: "");
552 * Look up a client by IP address and protocol version
553 * - creates a new record if one doesn't yet exist
555 static struct nfs_client
*
556 nfs_get_client(const struct nfs_client_initdata
*cl_init
,
557 const struct rpc_timeout
*timeparms
,
559 rpc_authflavor_t authflavour
)
561 struct nfs_client
*clp
, *new = NULL
;
562 struct nfs_net
*nn
= net_generic(cl_init
->net
, nfs_net_id
);
564 dprintk("--> nfs_get_client(%s,v%u)\n",
565 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
567 /* see if the client already exists */
569 spin_lock(&nn
->nfs_client_lock
);
571 clp
= nfs_match_client(cl_init
);
573 spin_unlock(&nn
->nfs_client_lock
);
575 nfs_free_client(new);
576 return nfs_found_client(cl_init
, clp
);
579 list_add(&new->cl_share_link
, &nn
->nfs_client_list
);
580 spin_unlock(&nn
->nfs_client_lock
);
581 new->cl_flags
= cl_init
->init_flags
;
582 return cl_init
->rpc_ops
->init_client(new,
587 spin_unlock(&nn
->nfs_client_lock
);
589 new = nfs_alloc_client(cl_init
);
590 } while (!IS_ERR(new));
592 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
593 cl_init
->hostname
?: "", PTR_ERR(new));
598 * Mark a server as ready or failed
600 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
603 clp
->cl_cons_state
= state
;
604 wake_up_all(&nfs_client_active_wq
);
608 * Initialise the timeout values for a connection
610 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
611 unsigned int timeo
, unsigned int retrans
)
613 to
->to_initval
= timeo
* HZ
/ 10;
614 to
->to_retries
= retrans
;
617 case XPRT_TRANSPORT_TCP
:
618 case XPRT_TRANSPORT_RDMA
:
619 if (to
->to_retries
== 0)
620 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
621 if (to
->to_initval
== 0)
622 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
623 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
624 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
625 to
->to_increment
= to
->to_initval
;
626 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
627 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
628 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
629 if (to
->to_maxval
< to
->to_initval
)
630 to
->to_maxval
= to
->to_initval
;
631 to
->to_exponential
= 0;
633 case XPRT_TRANSPORT_UDP
:
634 if (to
->to_retries
== 0)
635 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
637 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
638 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
639 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
640 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
641 to
->to_exponential
= 1;
649 * Create an RPC client handle
651 static int nfs_create_rpc_client(struct nfs_client
*clp
,
652 const struct rpc_timeout
*timeparms
,
653 rpc_authflavor_t flavor
)
655 struct rpc_clnt
*clnt
= NULL
;
656 struct rpc_create_args args
= {
658 .protocol
= clp
->cl_proto
,
659 .address
= (struct sockaddr
*)&clp
->cl_addr
,
660 .addrsize
= clp
->cl_addrlen
,
661 .timeout
= timeparms
,
662 .servername
= clp
->cl_hostname
,
663 .program
= &nfs_program
,
664 .version
= clp
->rpc_ops
->version
,
665 .authflavor
= flavor
,
668 if (test_bit(NFS_CS_DISCRTRY
, &clp
->cl_flags
))
669 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
670 if (test_bit(NFS_CS_NORESVPORT
, &clp
->cl_flags
))
671 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
673 if (!IS_ERR(clp
->cl_rpcclient
))
676 clnt
= rpc_create(&args
);
678 dprintk("%s: cannot create RPC client. Error = %ld\n",
679 __func__
, PTR_ERR(clnt
));
680 return PTR_ERR(clnt
);
683 clp
->cl_rpcclient
= clnt
;
688 * Version 2 or 3 client destruction
690 static void nfs_destroy_server(struct nfs_server
*server
)
692 if (!(server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) ||
693 !(server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
694 nlmclnt_done(server
->nlm_host
);
698 * Version 2 or 3 lockd setup
700 static int nfs_start_lockd(struct nfs_server
*server
)
702 struct nlm_host
*host
;
703 struct nfs_client
*clp
= server
->nfs_client
;
704 struct nlmclnt_initdata nlm_init
= {
705 .hostname
= clp
->cl_hostname
,
706 .address
= (struct sockaddr
*)&clp
->cl_addr
,
707 .addrlen
= clp
->cl_addrlen
,
708 .nfs_version
= clp
->rpc_ops
->version
,
709 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
714 if (nlm_init
.nfs_version
> 3)
716 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
717 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
720 switch (clp
->cl_proto
) {
722 nlm_init
.protocol
= IPPROTO_TCP
;
724 case XPRT_TRANSPORT_UDP
:
725 nlm_init
.protocol
= IPPROTO_UDP
;
728 host
= nlmclnt_init(&nlm_init
);
730 return PTR_ERR(host
);
732 server
->nlm_host
= host
;
733 server
->destroy
= nfs_destroy_server
;
738 * Initialise an NFSv3 ACL client connection
740 #ifdef CONFIG_NFS_V3_ACL
741 static void nfs_init_server_aclclient(struct nfs_server
*server
)
743 if (server
->nfs_client
->rpc_ops
->version
!= 3)
745 if (server
->flags
& NFS_MOUNT_NOACL
)
748 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
749 if (IS_ERR(server
->client_acl
))
752 /* No errors! Assume that Sun nfsacls are supported */
753 server
->caps
|= NFS_CAP_ACLS
;
757 server
->caps
&= ~NFS_CAP_ACLS
;
760 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
762 server
->flags
&= ~NFS_MOUNT_NOACL
;
763 server
->caps
&= ~NFS_CAP_ACLS
;
768 * Create a general RPC client
770 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
771 const struct rpc_timeout
*timeo
,
772 rpc_authflavor_t pseudoflavour
)
774 struct nfs_client
*clp
= server
->nfs_client
;
776 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
777 if (IS_ERR(server
->client
)) {
778 dprintk("%s: couldn't create rpc_client!\n", __func__
);
779 return PTR_ERR(server
->client
);
782 memcpy(&server
->client
->cl_timeout_default
,
784 sizeof(server
->client
->cl_timeout_default
));
785 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
787 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
788 struct rpc_auth
*auth
;
790 auth
= rpcauth_create(pseudoflavour
, server
->client
);
792 dprintk("%s: couldn't create credcache!\n", __func__
);
793 return PTR_ERR(auth
);
796 server
->client
->cl_softrtry
= 0;
797 if (server
->flags
& NFS_MOUNT_SOFT
)
798 server
->client
->cl_softrtry
= 1;
804 * nfs_init_client - Initialise an NFS2 or NFS3 client
806 * @clp: nfs_client to initialise
807 * @timeparms: timeout parameters for underlying RPC transport
808 * @ip_addr: IP presentation address (not used)
809 * @authflavor: authentication flavor for underlying RPC transport
811 * Returns pointer to an NFS client, or an ERR_PTR value.
813 struct nfs_client
*nfs_init_client(struct nfs_client
*clp
,
814 const struct rpc_timeout
*timeparms
,
815 const char *ip_addr
, rpc_authflavor_t authflavour
)
819 if (clp
->cl_cons_state
== NFS_CS_READY
) {
820 /* the client is already initialised */
821 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
826 * Create a client RPC handle for doing FSSTAT with UNIX auth only
827 * - RFC 2623, sec 2.3.2
829 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
);
832 nfs_mark_client_ready(clp
, NFS_CS_READY
);
836 nfs_mark_client_ready(clp
, error
);
838 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
839 return ERR_PTR(error
);
843 * Create a version 2 or 3 client
845 static int nfs_init_server(struct nfs_server
*server
,
846 const struct nfs_parsed_mount_data
*data
)
848 struct nfs_client_initdata cl_init
= {
849 .hostname
= data
->nfs_server
.hostname
,
850 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
851 .addrlen
= data
->nfs_server
.addrlen
,
853 .proto
= data
->nfs_server
.protocol
,
856 struct rpc_timeout timeparms
;
857 struct nfs_client
*clp
;
860 dprintk("--> nfs_init_server()\n");
862 switch (data
->version
) {
865 cl_init
.rpc_ops
= &nfs_v2_clientops
;
870 cl_init
.rpc_ops
= &nfs_v3_clientops
;
874 return -EPROTONOSUPPORT
;
877 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
878 data
->timeo
, data
->retrans
);
879 if (data
->flags
& NFS_MOUNT_NORESVPORT
)
880 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
882 /* Allocate or find a client reference we can use */
883 clp
= nfs_get_client(&cl_init
, &timeparms
, NULL
, RPC_AUTH_UNIX
);
885 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
889 server
->nfs_client
= clp
;
891 /* Initialise the client representation from the mount data */
892 server
->flags
= data
->flags
;
893 server
->options
= data
->options
;
894 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
895 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
896 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
|NFS_CAP_CHANGE_ATTR
;
899 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
901 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
903 server
->acregmin
= data
->acregmin
* HZ
;
904 server
->acregmax
= data
->acregmax
* HZ
;
905 server
->acdirmin
= data
->acdirmin
* HZ
;
906 server
->acdirmax
= data
->acdirmax
* HZ
;
908 /* Start lockd here, before we might error out */
909 error
= nfs_start_lockd(server
);
913 server
->port
= data
->nfs_server
.port
;
915 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
919 /* Preserve the values of mount_server-related mount options */
920 if (data
->mount_server
.addrlen
) {
921 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
922 data
->mount_server
.addrlen
);
923 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
925 server
->mountd_version
= data
->mount_server
.version
;
926 server
->mountd_port
= data
->mount_server
.port
;
927 server
->mountd_protocol
= data
->mount_server
.protocol
;
929 server
->namelen
= data
->namlen
;
930 /* Create a client RPC handle for the NFSv3 ACL management interface */
931 nfs_init_server_aclclient(server
);
932 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
936 server
->nfs_client
= NULL
;
938 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
943 * Load up the server record from information gained in an fsinfo record
945 static void nfs_server_set_fsinfo(struct nfs_server
*server
,
946 struct nfs_fh
*mntfh
,
947 struct nfs_fsinfo
*fsinfo
)
949 unsigned long max_rpc_payload
;
951 /* Work out a lot of parameters */
952 if (server
->rsize
== 0)
953 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
954 if (server
->wsize
== 0)
955 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
957 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
958 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
959 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
960 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
962 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
963 if (server
->rsize
> max_rpc_payload
)
964 server
->rsize
= max_rpc_payload
;
965 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
966 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
967 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
969 server
->backing_dev_info
.name
= "nfs";
970 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
972 if (server
->wsize
> max_rpc_payload
)
973 server
->wsize
= max_rpc_payload
;
974 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
975 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
976 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
977 server
->pnfs_blksize
= fsinfo
->blksize
;
978 set_pnfs_layoutdriver(server
, mntfh
, fsinfo
->layouttype
);
980 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
982 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
983 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
984 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
985 if (server
->dtsize
> server
->rsize
)
986 server
->dtsize
= server
->rsize
;
988 if (server
->flags
& NFS_MOUNT_NOAC
) {
989 server
->acregmin
= server
->acregmax
= 0;
990 server
->acdirmin
= server
->acdirmax
= 0;
993 server
->maxfilesize
= fsinfo
->maxfilesize
;
995 server
->time_delta
= fsinfo
->time_delta
;
997 /* We're airborne Set socket buffersize */
998 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
1002 * Probe filesystem information, including the FSID on v2/v3
1004 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
1006 struct nfs_fsinfo fsinfo
;
1007 struct nfs_client
*clp
= server
->nfs_client
;
1010 dprintk("--> nfs_probe_fsinfo()\n");
1012 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
1013 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
1018 fsinfo
.fattr
= fattr
;
1019 fsinfo
.layouttype
= 0;
1020 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
1024 nfs_server_set_fsinfo(server
, mntfh
, &fsinfo
);
1026 /* Get some general file system info */
1027 if (server
->namelen
== 0) {
1028 struct nfs_pathconf pathinfo
;
1030 pathinfo
.fattr
= fattr
;
1031 nfs_fattr_init(fattr
);
1033 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
1034 server
->namelen
= pathinfo
.max_namelen
;
1037 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1041 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
1046 * Copy useful information when duplicating a server record
1048 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
1050 target
->flags
= source
->flags
;
1051 target
->rsize
= source
->rsize
;
1052 target
->wsize
= source
->wsize
;
1053 target
->acregmin
= source
->acregmin
;
1054 target
->acregmax
= source
->acregmax
;
1055 target
->acdirmin
= source
->acdirmin
;
1056 target
->acdirmax
= source
->acdirmax
;
1057 target
->caps
= source
->caps
;
1058 target
->options
= source
->options
;
1061 static void nfs_server_insert_lists(struct nfs_server
*server
)
1063 struct nfs_client
*clp
= server
->nfs_client
;
1064 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
1066 spin_lock(&nn
->nfs_client_lock
);
1067 list_add_tail_rcu(&server
->client_link
, &clp
->cl_superblocks
);
1068 list_add_tail(&server
->master_link
, &nn
->nfs_volume_list
);
1069 clear_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1070 spin_unlock(&nn
->nfs_client_lock
);
1074 static void nfs_server_remove_lists(struct nfs_server
*server
)
1076 struct nfs_client
*clp
= server
->nfs_client
;
1081 nn
= net_generic(clp
->cl_net
, nfs_net_id
);
1082 spin_lock(&nn
->nfs_client_lock
);
1083 list_del_rcu(&server
->client_link
);
1084 if (list_empty(&clp
->cl_superblocks
))
1085 set_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1086 list_del(&server
->master_link
);
1087 spin_unlock(&nn
->nfs_client_lock
);
1093 * Allocate and initialise a server record
1095 static struct nfs_server
*nfs_alloc_server(void)
1097 struct nfs_server
*server
;
1099 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1103 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
1105 /* Zero out the NFS state stuff */
1106 INIT_LIST_HEAD(&server
->client_link
);
1107 INIT_LIST_HEAD(&server
->master_link
);
1108 INIT_LIST_HEAD(&server
->delegations
);
1109 INIT_LIST_HEAD(&server
->layouts
);
1110 INIT_LIST_HEAD(&server
->state_owners_lru
);
1112 atomic_set(&server
->active
, 0);
1114 server
->io_stats
= nfs_alloc_iostats();
1115 if (!server
->io_stats
) {
1120 if (bdi_init(&server
->backing_dev_info
)) {
1121 nfs_free_iostats(server
->io_stats
);
1126 ida_init(&server
->openowner_id
);
1127 ida_init(&server
->lockowner_id
);
1128 pnfs_init_server(server
);
1134 * Free up a server record
1136 void nfs_free_server(struct nfs_server
*server
)
1138 dprintk("--> nfs_free_server()\n");
1140 nfs_server_remove_lists(server
);
1141 unset_pnfs_layoutdriver(server
);
1143 if (server
->destroy
!= NULL
)
1144 server
->destroy(server
);
1146 if (!IS_ERR(server
->client_acl
))
1147 rpc_shutdown_client(server
->client_acl
);
1148 if (!IS_ERR(server
->client
))
1149 rpc_shutdown_client(server
->client
);
1151 nfs_put_client(server
->nfs_client
);
1153 ida_destroy(&server
->lockowner_id
);
1154 ida_destroy(&server
->openowner_id
);
1155 nfs_free_iostats(server
->io_stats
);
1156 bdi_destroy(&server
->backing_dev_info
);
1158 nfs_release_automount_timer();
1159 dprintk("<-- nfs_free_server()\n");
1163 * Create a version 2 or 3 volume record
1164 * - keyed on server and FSID
1166 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1167 struct nfs_fh
*mntfh
)
1169 struct nfs_server
*server
;
1170 struct nfs_fattr
*fattr
;
1173 server
= nfs_alloc_server();
1175 return ERR_PTR(-ENOMEM
);
1178 fattr
= nfs_alloc_fattr();
1182 /* Get a client representation */
1183 error
= nfs_init_server(server
, data
);
1187 BUG_ON(!server
->nfs_client
);
1188 BUG_ON(!server
->nfs_client
->rpc_ops
);
1189 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1191 /* Probe the root fh to retrieve its FSID */
1192 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1195 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1196 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1197 server
->namelen
= NFS3_MAXNAMLEN
;
1198 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1199 server
->caps
|= NFS_CAP_READDIRPLUS
;
1201 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1202 server
->namelen
= NFS2_MAXNAMLEN
;
1205 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1206 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, fattr
);
1208 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1212 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1214 dprintk("Server FSID: %llx:%llx\n",
1215 (unsigned long long) server
->fsid
.major
,
1216 (unsigned long long) server
->fsid
.minor
);
1218 nfs_server_insert_lists(server
);
1219 server
->mount_time
= jiffies
;
1220 nfs_free_fattr(fattr
);
1224 nfs_free_fattr(fattr
);
1225 nfs_free_server(server
);
1226 return ERR_PTR(error
);
1229 #ifdef CONFIG_NFS_V4
1231 * NFSv4.0 callback thread helper
1233 * Find a client by callback identifier
1236 nfs4_find_client_ident(struct net
*net
, int cb_ident
)
1238 struct nfs_client
*clp
;
1239 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1241 spin_lock(&nn
->nfs_client_lock
);
1242 clp
= idr_find(&nn
->cb_ident_idr
, cb_ident
);
1244 atomic_inc(&clp
->cl_count
);
1245 spin_unlock(&nn
->nfs_client_lock
);
1249 #if defined(CONFIG_NFS_V4_1)
1251 * NFSv4.1 callback thread helper
1252 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1253 * minorversion, and sessionID
1255 * Returns NULL if no such client
1258 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
1259 struct nfs4_sessionid
*sid
)
1261 struct nfs_client
*clp
;
1262 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1264 spin_lock(&nn
->nfs_client_lock
);
1265 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
1266 if (nfs4_cb_match_client(addr
, clp
, 1) == false)
1269 if (!nfs4_has_session(clp
))
1272 /* Match sessionid*/
1273 if (memcmp(clp
->cl_session
->sess_id
.data
,
1274 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
1277 atomic_inc(&clp
->cl_count
);
1278 spin_unlock(&nn
->nfs_client_lock
);
1281 spin_unlock(&nn
->nfs_client_lock
);
1285 #else /* CONFIG_NFS_V4_1 */
1288 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
1289 struct nfs4_sessionid
*sid
)
1293 #endif /* CONFIG_NFS_V4_1 */
1296 * Initialize the NFS4 callback service
1298 static int nfs4_init_callback(struct nfs_client
*clp
)
1302 if (clp
->rpc_ops
->version
== 4) {
1303 struct rpc_xprt
*xprt
;
1305 xprt
= rcu_dereference_raw(clp
->cl_rpcclient
->cl_xprt
);
1307 if (nfs4_has_session(clp
)) {
1308 error
= xprt_setup_backchannel(xprt
,
1309 NFS41_BC_MIN_CALLBACKS
);
1314 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
, xprt
);
1316 dprintk("%s: failed to start callback. Error = %d\n",
1320 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
1326 * Initialize the minor version specific parts of an NFS4 client record
1328 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
1330 #if defined(CONFIG_NFS_V4_1)
1331 if (clp
->cl_mvops
->minor_version
) {
1332 struct nfs4_session
*session
= NULL
;
1334 * Create the session and mark it expired.
1335 * When a SEQUENCE operation encounters the expired session
1336 * it will do session recovery to initialize it.
1338 session
= nfs4_alloc_session(clp
);
1342 clp
->cl_session
= session
;
1344 * The create session reply races with the server back
1345 * channel probe. Mark the client NFS_CS_SESSION_INITING
1346 * so that the client back channel can find the
1349 nfs_mark_client_ready(clp
, NFS_CS_SESSION_INITING
);
1351 #endif /* CONFIG_NFS_V4_1 */
1353 return nfs4_init_callback(clp
);
1357 * nfs4_init_client - Initialise an NFS4 client record
1359 * @clp: nfs_client to initialise
1360 * @timeparms: timeout parameters for underlying RPC transport
1361 * @ip_addr: callback IP address in presentation format
1362 * @authflavor: authentication flavor for underlying RPC transport
1364 * Returns pointer to an NFS client, or an ERR_PTR value.
1366 struct nfs_client
*nfs4_init_client(struct nfs_client
*clp
,
1367 const struct rpc_timeout
*timeparms
,
1368 const char *ip_addr
,
1369 rpc_authflavor_t authflavour
)
1371 char buf
[INET6_ADDRSTRLEN
+ 1];
1374 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1375 /* the client is initialised already */
1376 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1380 /* Check NFS protocol revision and initialize RPC op vector */
1381 clp
->rpc_ops
= &nfs_v4_clientops
;
1383 __set_bit(NFS_CS_DISCRTRY
, &clp
->cl_flags
);
1384 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
);
1388 /* If no clientaddr= option was specified, find a usable cb address */
1389 if (ip_addr
== NULL
) {
1390 struct sockaddr_storage cb_addr
;
1391 struct sockaddr
*sap
= (struct sockaddr
*)&cb_addr
;
1393 error
= rpc_localaddr(clp
->cl_rpcclient
, sap
, sizeof(cb_addr
));
1396 error
= rpc_ntop(sap
, buf
, sizeof(buf
));
1399 ip_addr
= (const char *)buf
;
1401 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1403 error
= nfs_idmap_new(clp
);
1405 dprintk("%s: failed to create idmapper. Error = %d\n",
1409 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1411 error
= nfs4_init_client_minor_version(clp
);
1415 if (!nfs4_has_session(clp
))
1416 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1420 nfs_mark_client_ready(clp
, error
);
1421 nfs_put_client(clp
);
1422 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1423 return ERR_PTR(error
);
1427 * Set up an NFS4 client
1429 static int nfs4_set_client(struct nfs_server
*server
,
1430 const char *hostname
,
1431 const struct sockaddr
*addr
,
1432 const size_t addrlen
,
1433 const char *ip_addr
,
1434 rpc_authflavor_t authflavour
,
1435 int proto
, const struct rpc_timeout
*timeparms
,
1436 u32 minorversion
, struct net
*net
)
1438 struct nfs_client_initdata cl_init
= {
1439 .hostname
= hostname
,
1442 .rpc_ops
= &nfs_v4_clientops
,
1444 .minorversion
= minorversion
,
1447 struct nfs_client
*clp
;
1450 dprintk("--> nfs4_set_client()\n");
1452 if (server
->flags
& NFS_MOUNT_NORESVPORT
)
1453 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
1455 /* Allocate or find a client reference we can use */
1456 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
);
1458 error
= PTR_ERR(clp
);
1463 * Query for the lease time on clientid setup or renewal
1465 * Note that this will be set on nfs_clients that were created
1466 * only for the DS role and did not set this bit, but now will
1467 * serve a dual role.
1469 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
1471 server
->nfs_client
= clp
;
1472 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1475 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1480 * Set up a pNFS Data Server client.
1482 * Return any existing nfs_client that matches server address,port,version
1485 * For a new nfs_client, use a soft mount (default), a low retrans and a
1486 * low timeout interval so that if a connection is lost, we retry through
1489 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
1490 const struct sockaddr
*ds_addr
, int ds_addrlen
,
1491 int ds_proto
, unsigned int ds_timeo
, unsigned int ds_retrans
)
1493 struct nfs_client_initdata cl_init
= {
1495 .addrlen
= ds_addrlen
,
1496 .rpc_ops
= &nfs_v4_clientops
,
1498 .minorversion
= mds_clp
->cl_minorversion
,
1499 .net
= mds_clp
->cl_net
,
1501 struct rpc_timeout ds_timeout
;
1502 struct nfs_client
*clp
;
1505 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1506 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1507 * (section 13.1 RFC 5661).
1509 nfs_init_timeout_values(&ds_timeout
, ds_proto
, ds_timeo
, ds_retrans
);
1510 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
1511 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
);
1513 dprintk("<-- %s %p\n", __func__
, clp
);
1516 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
1519 * Session has been established, and the client marked ready.
1520 * Set the mount rsize and wsize with negotiated fore channel
1521 * attributes which will be bound checked in nfs_server_set_fsinfo.
1523 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1525 #ifdef CONFIG_NFS_V4_1
1526 struct nfs4_session
*sess
;
1530 if (!nfs4_has_session(server
->nfs_client
))
1532 sess
= server
->nfs_client
->cl_session
;
1533 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
1534 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
1536 if (server
->rsize
> server_resp_sz
)
1537 server
->rsize
= server_resp_sz
;
1538 if (server
->wsize
> server_rqst_sz
)
1539 server
->wsize
= server_rqst_sz
;
1540 #endif /* CONFIG_NFS_V4_1 */
1543 static int nfs4_server_common_setup(struct nfs_server
*server
,
1544 struct nfs_fh
*mntfh
)
1546 struct nfs_fattr
*fattr
;
1549 BUG_ON(!server
->nfs_client
);
1550 BUG_ON(!server
->nfs_client
->rpc_ops
);
1551 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1553 /* data servers support only a subset of NFSv4.1 */
1554 if (is_ds_only_client(server
->nfs_client
))
1555 return -EPROTONOSUPPORT
;
1557 fattr
= nfs_alloc_fattr();
1561 /* We must ensure the session is initialised first */
1562 error
= nfs4_init_session(server
);
1566 /* Probe the root fh to retrieve its FSID and filehandle */
1567 error
= nfs4_get_rootfh(server
, mntfh
);
1571 dprintk("Server FSID: %llx:%llx\n",
1572 (unsigned long long) server
->fsid
.major
,
1573 (unsigned long long) server
->fsid
.minor
);
1574 dprintk("Mount FH: %d\n", mntfh
->size
);
1576 nfs4_session_set_rwsize(server
);
1578 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1582 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1583 server
->namelen
= NFS4_MAXNAMLEN
;
1585 nfs_server_insert_lists(server
);
1586 server
->mount_time
= jiffies
;
1587 server
->destroy
= nfs4_destroy_server
;
1589 nfs_free_fattr(fattr
);
1594 * Create a version 4 volume record
1596 static int nfs4_init_server(struct nfs_server
*server
,
1597 const struct nfs_parsed_mount_data
*data
)
1599 struct rpc_timeout timeparms
;
1602 dprintk("--> nfs4_init_server()\n");
1604 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1605 data
->timeo
, data
->retrans
);
1607 /* Initialise the client representation from the mount data */
1608 server
->flags
= data
->flags
;
1609 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
|NFS_CAP_POSIX_LOCK
;
1610 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1611 server
->caps
|= NFS_CAP_READDIRPLUS
;
1612 server
->options
= data
->options
;
1614 /* Get a client record */
1615 error
= nfs4_set_client(server
,
1616 data
->nfs_server
.hostname
,
1617 (const struct sockaddr
*)&data
->nfs_server
.address
,
1618 data
->nfs_server
.addrlen
,
1619 data
->client_address
,
1620 data
->auth_flavors
[0],
1621 data
->nfs_server
.protocol
,
1629 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1632 if (nfs4_disable_idmapping
&& data
->auth_flavors
[0] == RPC_AUTH_UNIX
)
1633 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
1636 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1638 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1640 server
->acregmin
= data
->acregmin
* HZ
;
1641 server
->acregmax
= data
->acregmax
* HZ
;
1642 server
->acdirmin
= data
->acdirmin
* HZ
;
1643 server
->acdirmax
= data
->acdirmax
* HZ
;
1645 server
->port
= data
->nfs_server
.port
;
1647 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1651 dprintk("<-- nfs4_init_server() = %d\n", error
);
1656 * Create a version 4 volume record
1657 * - keyed on server and FSID
1659 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1660 struct nfs_fh
*mntfh
)
1662 struct nfs_server
*server
;
1665 dprintk("--> nfs4_create_server()\n");
1667 server
= nfs_alloc_server();
1669 return ERR_PTR(-ENOMEM
);
1671 /* set up the general RPC client */
1672 error
= nfs4_init_server(server
, data
);
1676 error
= nfs4_server_common_setup(server
, mntfh
);
1680 dprintk("<-- nfs4_create_server() = %p\n", server
);
1684 nfs_free_server(server
);
1685 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1686 return ERR_PTR(error
);
1690 * Create an NFS4 referral server record
1692 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1693 struct nfs_fh
*mntfh
)
1695 struct nfs_client
*parent_client
;
1696 struct nfs_server
*server
, *parent_server
;
1699 dprintk("--> nfs4_create_referral_server()\n");
1701 server
= nfs_alloc_server();
1703 return ERR_PTR(-ENOMEM
);
1705 parent_server
= NFS_SB(data
->sb
);
1706 parent_client
= parent_server
->nfs_client
;
1708 /* Initialise the client representation from the parent server */
1709 nfs_server_copy_userdata(server
, parent_server
);
1710 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1712 /* Get a client representation.
1713 * Note: NFSv4 always uses TCP, */
1714 error
= nfs4_set_client(server
, data
->hostname
,
1717 parent_client
->cl_ipaddr
,
1719 rpc_protocol(parent_server
->client
),
1720 parent_server
->client
->cl_timeout
,
1721 parent_client
->cl_mvops
->minor_version
,
1722 parent_client
->cl_net
);
1726 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1730 error
= nfs4_server_common_setup(server
, mntfh
);
1734 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1738 nfs_free_server(server
);
1739 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1740 return ERR_PTR(error
);
1743 #endif /* CONFIG_NFS_V4 */
1746 * Clone an NFS2, NFS3 or NFS4 server record
1748 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1750 struct nfs_fattr
*fattr
,
1751 rpc_authflavor_t flavor
)
1753 struct nfs_server
*server
;
1754 struct nfs_fattr
*fattr_fsinfo
;
1757 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1758 (unsigned long long) fattr
->fsid
.major
,
1759 (unsigned long long) fattr
->fsid
.minor
);
1761 server
= nfs_alloc_server();
1763 return ERR_PTR(-ENOMEM
);
1766 fattr_fsinfo
= nfs_alloc_fattr();
1767 if (fattr_fsinfo
== NULL
)
1768 goto out_free_server
;
1770 /* Copy data from the source */
1771 server
->nfs_client
= source
->nfs_client
;
1772 server
->destroy
= source
->destroy
;
1773 atomic_inc(&server
->nfs_client
->cl_count
);
1774 nfs_server_copy_userdata(server
, source
);
1776 server
->fsid
= fattr
->fsid
;
1778 error
= nfs_init_server_rpcclient(server
,
1779 source
->client
->cl_timeout
,
1782 goto out_free_server
;
1783 if (!IS_ERR(source
->client_acl
))
1784 nfs_init_server_aclclient(server
);
1786 /* probe the filesystem info for this server filesystem */
1787 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1789 goto out_free_server
;
1791 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1792 server
->namelen
= NFS4_MAXNAMLEN
;
1794 dprintk("Cloned FSID: %llx:%llx\n",
1795 (unsigned long long) server
->fsid
.major
,
1796 (unsigned long long) server
->fsid
.minor
);
1798 error
= nfs_start_lockd(server
);
1800 goto out_free_server
;
1802 nfs_server_insert_lists(server
);
1803 server
->mount_time
= jiffies
;
1805 nfs_free_fattr(fattr_fsinfo
);
1806 dprintk("<-- nfs_clone_server() = %p\n", server
);
1810 nfs_free_fattr(fattr_fsinfo
);
1811 nfs_free_server(server
);
1812 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1813 return ERR_PTR(error
);
1816 void nfs_clients_init(struct net
*net
)
1818 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1820 INIT_LIST_HEAD(&nn
->nfs_client_list
);
1821 INIT_LIST_HEAD(&nn
->nfs_volume_list
);
1822 #ifdef CONFIG_NFS_V4
1823 idr_init(&nn
->cb_ident_idr
);
1825 spin_lock_init(&nn
->nfs_client_lock
);
1826 nn
->boot_time
= CURRENT_TIME
;
1829 #ifdef CONFIG_PROC_FS
1830 static struct proc_dir_entry
*proc_fs_nfs
;
1832 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1833 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1834 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1835 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1836 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1838 static const struct seq_operations nfs_server_list_ops
= {
1839 .start
= nfs_server_list_start
,
1840 .next
= nfs_server_list_next
,
1841 .stop
= nfs_server_list_stop
,
1842 .show
= nfs_server_list_show
,
1845 static const struct file_operations nfs_server_list_fops
= {
1846 .open
= nfs_server_list_open
,
1848 .llseek
= seq_lseek
,
1849 .release
= seq_release
,
1850 .owner
= THIS_MODULE
,
1853 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1854 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1855 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1856 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1857 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1859 static const struct seq_operations nfs_volume_list_ops
= {
1860 .start
= nfs_volume_list_start
,
1861 .next
= nfs_volume_list_next
,
1862 .stop
= nfs_volume_list_stop
,
1863 .show
= nfs_volume_list_show
,
1866 static const struct file_operations nfs_volume_list_fops
= {
1867 .open
= nfs_volume_list_open
,
1869 .llseek
= seq_lseek
,
1870 .release
= seq_release
,
1871 .owner
= THIS_MODULE
,
1875 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1878 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1882 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1883 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1885 ret
= seq_open(file
, &nfs_server_list_ops
);
1889 m
= file
->private_data
;
1896 * set up the iterator to start reading from the server list and return the first item
1898 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1900 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1902 /* lock the list against modification */
1903 spin_lock(&nn
->nfs_client_lock
);
1904 return seq_list_start_head(&nn
->nfs_client_list
, *_pos
);
1908 * move to next server
1910 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1912 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1914 return seq_list_next(v
, &nn
->nfs_client_list
, pos
);
1918 * clean up after reading from the transports list
1920 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1922 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1924 spin_unlock(&nn
->nfs_client_lock
);
1928 * display a header line followed by a load of call lines
1930 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1932 struct nfs_client
*clp
;
1933 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1935 /* display header on line 1 */
1936 if (v
== &nn
->nfs_client_list
) {
1937 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1941 /* display one transport per line on subsequent lines */
1942 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1944 /* Check if the client is initialized */
1945 if (clp
->cl_cons_state
!= NFS_CS_READY
)
1949 seq_printf(m
, "v%u %s %s %3d %s\n",
1950 clp
->rpc_ops
->version
,
1951 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1952 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1953 atomic_read(&clp
->cl_count
),
1961 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1963 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1967 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1968 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1970 ret
= seq_open(file
, &nfs_volume_list_ops
);
1974 m
= file
->private_data
;
1981 * set up the iterator to start reading from the volume list and return the first item
1983 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1985 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1987 /* lock the list against modification */
1988 spin_lock(&nn
->nfs_client_lock
);
1989 return seq_list_start_head(&nn
->nfs_volume_list
, *_pos
);
1993 * move to next volume
1995 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1997 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1999 return seq_list_next(v
, &nn
->nfs_volume_list
, pos
);
2003 * clean up after reading from the transports list
2005 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
2007 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
2009 spin_unlock(&nn
->nfs_client_lock
);
2013 * display a header line followed by a load of call lines
2015 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
2017 struct nfs_server
*server
;
2018 struct nfs_client
*clp
;
2019 char dev
[8], fsid
[17];
2020 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
2022 /* display header on line 1 */
2023 if (v
== &nn
->nfs_volume_list
) {
2024 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
2027 /* display one transport per line on subsequent lines */
2028 server
= list_entry(v
, struct nfs_server
, master_link
);
2029 clp
= server
->nfs_client
;
2031 snprintf(dev
, 8, "%u:%u",
2032 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
2034 snprintf(fsid
, 17, "%llx:%llx",
2035 (unsigned long long) server
->fsid
.major
,
2036 (unsigned long long) server
->fsid
.minor
);
2039 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
2040 clp
->rpc_ops
->version
,
2041 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
2042 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
2045 nfs_server_fscache_state(server
));
2052 * initialise the /proc/fs/nfsfs/ directory
2054 int __init
nfs_fs_proc_init(void)
2056 struct proc_dir_entry
*p
;
2058 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
2062 /* a file of servers with which we're dealing */
2063 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
2064 proc_fs_nfs
, &nfs_server_list_fops
);
2068 /* a file of volumes that we have mounted */
2069 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
2070 proc_fs_nfs
, &nfs_volume_list_fops
);
2076 remove_proc_entry("servers", proc_fs_nfs
);
2078 remove_proc_entry("fs/nfsfs", NULL
);
2084 * clean up the /proc/fs/nfsfs/ directory
2086 void nfs_fs_proc_exit(void)
2088 remove_proc_entry("volumes", proc_fs_nfs
);
2089 remove_proc_entry("servers", proc_fs_nfs
);
2090 remove_proc_entry("fs/nfsfs", NULL
);
2093 #endif /* CONFIG_PROC_FS */
2095 module_param(nfs4_disable_idmapping
, bool, 0644);
2096 MODULE_PARM_DESC(nfs4_disable_idmapping
,
2097 "Turn off NFSv4 idmapping when using 'sec=sys'");