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_deviceid_purge_client(clp
);
211 nfs4_destroy_session(clp
->cl_session
);
212 nfs4_destroy_clientid(clp
);
216 #else /* CONFIG_NFS_V4_1 */
217 static void nfs4_shutdown_session(struct nfs_client
*clp
)
220 #endif /* CONFIG_NFS_V4_1 */
223 * Destroy the NFS4 callback service
225 static void nfs4_destroy_callback(struct nfs_client
*clp
)
227 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
228 nfs_callback_down(clp
->cl_mvops
->minor_version
);
231 static void nfs4_shutdown_client(struct nfs_client
*clp
)
233 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
234 nfs4_kill_renewd(clp
);
235 nfs4_shutdown_session(clp
);
236 nfs4_destroy_callback(clp
);
237 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
238 nfs_idmap_delete(clp
);
240 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
241 kfree(clp
->cl_serverowner
);
242 kfree(clp
->cl_serverscope
);
243 kfree(clp
->cl_implid
);
246 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
247 void nfs_cleanup_cb_ident_idr(struct net
*net
)
249 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
251 idr_destroy(&nn
->cb_ident_idr
);
254 /* nfs_client_lock held */
255 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
257 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
259 if (clp
->cl_cb_ident
)
260 idr_remove(&nn
->cb_ident_idr
, clp
->cl_cb_ident
);
263 static void pnfs_init_server(struct nfs_server
*server
)
265 rpc_init_wait_queue(&server
->roc_rpcwaitq
, "pNFS ROC");
268 static void nfs4_destroy_server(struct nfs_server
*server
)
270 nfs4_purge_state_owners(server
);
274 static void nfs4_shutdown_client(struct nfs_client
*clp
)
278 void nfs_cleanup_cb_ident_idr(struct net
*net
)
282 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
286 static void pnfs_init_server(struct nfs_server
*server
)
290 #endif /* CONFIG_NFS_V4 */
293 * Destroy a shared client record
295 static void nfs_free_client(struct nfs_client
*clp
)
297 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
299 nfs4_shutdown_client(clp
);
301 nfs_fscache_release_client_cookie(clp
);
303 /* -EIO all pending I/O */
304 if (!IS_ERR(clp
->cl_rpcclient
))
305 rpc_shutdown_client(clp
->cl_rpcclient
);
307 if (clp
->cl_machine_cred
!= NULL
)
308 put_rpccred(clp
->cl_machine_cred
);
310 put_net(clp
->cl_net
);
311 kfree(clp
->cl_hostname
);
314 dprintk("<-- nfs_free_client()\n");
318 * Release a reference to a shared client record
320 void nfs_put_client(struct nfs_client
*clp
)
327 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
328 nn
= net_generic(clp
->cl_net
, nfs_net_id
);
330 if (atomic_dec_and_lock(&clp
->cl_count
, &nn
->nfs_client_lock
)) {
331 list_del(&clp
->cl_share_link
);
332 nfs_cb_idr_remove_locked(clp
);
333 spin_unlock(&nn
->nfs_client_lock
);
335 BUG_ON(!list_empty(&clp
->cl_superblocks
));
337 nfs_free_client(clp
);
340 EXPORT_SYMBOL_GPL(nfs_put_client
);
342 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
344 * Test if two ip6 socket addresses refer to the same socket by
345 * comparing relevant fields. The padding bytes specifically, are not
346 * compared. sin6_flowinfo is not compared because it only affects QoS
347 * and sin6_scope_id is only compared if the address is "link local"
348 * because "link local" addresses need only be unique to a specific
349 * link. Conversely, ordinary unicast addresses might have different
352 * The caller should ensure both socket addresses are AF_INET6.
354 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
355 const struct sockaddr
*sa2
)
357 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
358 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
360 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
362 else if (ipv6_addr_type(&sin1
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
363 return sin1
->sin6_scope_id
== sin2
->sin6_scope_id
;
367 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
368 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
369 const struct sockaddr
*sa2
)
376 * Test if two ip4 socket addresses refer to the same socket, by
377 * comparing relevant fields. The padding bytes specifically, are
380 * The caller should ensure both socket addresses are AF_INET.
382 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
383 const struct sockaddr
*sa2
)
385 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
386 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
388 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
391 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
392 const struct sockaddr
*sa2
)
394 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
395 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
397 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
398 (sin1
->sin6_port
== sin2
->sin6_port
);
401 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
402 const struct sockaddr
*sa2
)
404 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
405 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
407 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
408 (sin1
->sin_port
== sin2
->sin_port
);
411 #if defined(CONFIG_NFS_V4_1)
413 * Test if two socket addresses represent the same actual socket,
414 * by comparing (only) relevant fields, excluding the port number.
416 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
417 const struct sockaddr
*sa2
)
419 if (sa1
->sa_family
!= sa2
->sa_family
)
422 switch (sa1
->sa_family
) {
424 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
426 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
430 #endif /* CONFIG_NFS_V4_1 */
433 * Test if two socket addresses represent the same actual socket,
434 * by comparing (only) relevant fields, including the port number.
436 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
437 const struct sockaddr
*sa2
)
439 if (sa1
->sa_family
!= sa2
->sa_family
)
442 switch (sa1
->sa_family
) {
444 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
446 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
451 #if defined(CONFIG_NFS_V4_1)
452 /* Common match routine for v4.0 and v4.1 callback services */
453 static bool nfs4_cb_match_client(const struct sockaddr
*addr
,
454 struct nfs_client
*clp
, u32 minorversion
)
456 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
458 /* Don't match clients that failed to initialise */
459 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
460 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
465 /* Match the version and minorversion */
466 if (clp
->rpc_ops
->version
!= 4 ||
467 clp
->cl_minorversion
!= minorversion
)
470 /* Match only the IP address, not the port number */
471 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
476 #endif /* CONFIG_NFS_V4_1 */
479 * Find an nfs_client on the list that matches the initialisation data
482 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
484 struct nfs_client
*clp
;
485 const struct sockaddr
*sap
= data
->addr
;
486 struct nfs_net
*nn
= net_generic(data
->net
, nfs_net_id
);
488 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
489 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
490 /* Don't match clients that failed to initialise properly */
491 if (clp
->cl_cons_state
< 0)
494 /* Different NFS versions cannot share the same nfs_client */
495 if (clp
->rpc_ops
!= data
->rpc_ops
)
498 if (clp
->cl_proto
!= data
->proto
)
500 /* Match nfsv4 minorversion */
501 if (clp
->cl_minorversion
!= data
->minorversion
)
503 /* Match the full socket address */
504 if (!nfs_sockaddr_cmp(sap
, clap
))
507 atomic_inc(&clp
->cl_count
);
513 static bool nfs_client_init_is_complete(const struct nfs_client
*clp
)
515 return clp
->cl_cons_state
!= NFS_CS_INITING
;
518 int nfs_wait_client_init_complete(const struct nfs_client
*clp
)
520 return wait_event_killable(nfs_client_active_wq
,
521 nfs_client_init_is_complete(clp
));
525 * Found an existing client. Make sure it's ready before returning.
527 static struct nfs_client
*
528 nfs_found_client(const struct nfs_client_initdata
*cl_init
,
529 struct nfs_client
*clp
)
533 error
= nfs_wait_client_init_complete(clp
);
536 return ERR_PTR(-ERESTARTSYS
);
539 if (clp
->cl_cons_state
< NFS_CS_READY
) {
540 error
= clp
->cl_cons_state
;
542 return ERR_PTR(error
);
547 dprintk("<-- %s found nfs_client %p for %s\n",
548 __func__
, clp
, cl_init
->hostname
?: "");
553 * Look up a client by IP address and protocol version
554 * - creates a new record if one doesn't yet exist
556 static struct nfs_client
*
557 nfs_get_client(const struct nfs_client_initdata
*cl_init
,
558 const struct rpc_timeout
*timeparms
,
560 rpc_authflavor_t authflavour
)
562 struct nfs_client
*clp
, *new = NULL
;
563 struct nfs_net
*nn
= net_generic(cl_init
->net
, nfs_net_id
);
565 dprintk("--> nfs_get_client(%s,v%u)\n",
566 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
568 /* see if the client already exists */
570 spin_lock(&nn
->nfs_client_lock
);
572 clp
= nfs_match_client(cl_init
);
574 spin_unlock(&nn
->nfs_client_lock
);
576 nfs_free_client(new);
577 return nfs_found_client(cl_init
, clp
);
580 list_add(&new->cl_share_link
, &nn
->nfs_client_list
);
581 spin_unlock(&nn
->nfs_client_lock
);
582 new->cl_flags
= cl_init
->init_flags
;
583 return cl_init
->rpc_ops
->init_client(new,
588 spin_unlock(&nn
->nfs_client_lock
);
590 new = nfs_alloc_client(cl_init
);
591 } while (!IS_ERR(new));
593 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
594 cl_init
->hostname
?: "", PTR_ERR(new));
599 * Mark a server as ready or failed
601 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
604 clp
->cl_cons_state
= state
;
605 wake_up_all(&nfs_client_active_wq
);
609 * Initialise the timeout values for a connection
611 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
612 unsigned int timeo
, unsigned int retrans
)
614 to
->to_initval
= timeo
* HZ
/ 10;
615 to
->to_retries
= retrans
;
618 case XPRT_TRANSPORT_TCP
:
619 case XPRT_TRANSPORT_RDMA
:
620 if (to
->to_retries
== 0)
621 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
622 if (to
->to_initval
== 0)
623 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
624 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
625 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
626 to
->to_increment
= to
->to_initval
;
627 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
628 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
629 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
630 if (to
->to_maxval
< to
->to_initval
)
631 to
->to_maxval
= to
->to_initval
;
632 to
->to_exponential
= 0;
634 case XPRT_TRANSPORT_UDP
:
635 if (to
->to_retries
== 0)
636 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
638 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
639 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
640 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
641 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
642 to
->to_exponential
= 1;
650 * Create an RPC client handle
652 static int nfs_create_rpc_client(struct nfs_client
*clp
,
653 const struct rpc_timeout
*timeparms
,
654 rpc_authflavor_t flavor
)
656 struct rpc_clnt
*clnt
= NULL
;
657 struct rpc_create_args args
= {
659 .protocol
= clp
->cl_proto
,
660 .address
= (struct sockaddr
*)&clp
->cl_addr
,
661 .addrsize
= clp
->cl_addrlen
,
662 .timeout
= timeparms
,
663 .servername
= clp
->cl_hostname
,
664 .program
= &nfs_program
,
665 .version
= clp
->rpc_ops
->version
,
666 .authflavor
= flavor
,
669 if (test_bit(NFS_CS_DISCRTRY
, &clp
->cl_flags
))
670 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
671 if (test_bit(NFS_CS_NORESVPORT
, &clp
->cl_flags
))
672 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
674 if (!IS_ERR(clp
->cl_rpcclient
))
677 clnt
= rpc_create(&args
);
679 dprintk("%s: cannot create RPC client. Error = %ld\n",
680 __func__
, PTR_ERR(clnt
));
681 return PTR_ERR(clnt
);
684 clp
->cl_rpcclient
= clnt
;
689 * Version 2 or 3 client destruction
691 static void nfs_destroy_server(struct nfs_server
*server
)
693 if (!(server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) ||
694 !(server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
695 nlmclnt_done(server
->nlm_host
);
699 * Version 2 or 3 lockd setup
701 static int nfs_start_lockd(struct nfs_server
*server
)
703 struct nlm_host
*host
;
704 struct nfs_client
*clp
= server
->nfs_client
;
705 struct nlmclnt_initdata nlm_init
= {
706 .hostname
= clp
->cl_hostname
,
707 .address
= (struct sockaddr
*)&clp
->cl_addr
,
708 .addrlen
= clp
->cl_addrlen
,
709 .nfs_version
= clp
->rpc_ops
->version
,
710 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
715 if (nlm_init
.nfs_version
> 3)
717 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
718 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
721 switch (clp
->cl_proto
) {
723 nlm_init
.protocol
= IPPROTO_TCP
;
725 case XPRT_TRANSPORT_UDP
:
726 nlm_init
.protocol
= IPPROTO_UDP
;
729 host
= nlmclnt_init(&nlm_init
);
731 return PTR_ERR(host
);
733 server
->nlm_host
= host
;
734 server
->destroy
= nfs_destroy_server
;
739 * Initialise an NFSv3 ACL client connection
741 #ifdef CONFIG_NFS_V3_ACL
742 static void nfs_init_server_aclclient(struct nfs_server
*server
)
744 if (server
->nfs_client
->rpc_ops
->version
!= 3)
746 if (server
->flags
& NFS_MOUNT_NOACL
)
749 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
750 if (IS_ERR(server
->client_acl
))
753 /* No errors! Assume that Sun nfsacls are supported */
754 server
->caps
|= NFS_CAP_ACLS
;
758 server
->caps
&= ~NFS_CAP_ACLS
;
761 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
763 server
->flags
&= ~NFS_MOUNT_NOACL
;
764 server
->caps
&= ~NFS_CAP_ACLS
;
769 * Create a general RPC client
771 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
772 const struct rpc_timeout
*timeo
,
773 rpc_authflavor_t pseudoflavour
)
775 struct nfs_client
*clp
= server
->nfs_client
;
777 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
778 if (IS_ERR(server
->client
)) {
779 dprintk("%s: couldn't create rpc_client!\n", __func__
);
780 return PTR_ERR(server
->client
);
783 memcpy(&server
->client
->cl_timeout_default
,
785 sizeof(server
->client
->cl_timeout_default
));
786 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
788 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
789 struct rpc_auth
*auth
;
791 auth
= rpcauth_create(pseudoflavour
, server
->client
);
793 dprintk("%s: couldn't create credcache!\n", __func__
);
794 return PTR_ERR(auth
);
797 server
->client
->cl_softrtry
= 0;
798 if (server
->flags
& NFS_MOUNT_SOFT
)
799 server
->client
->cl_softrtry
= 1;
805 * nfs_init_client - Initialise an NFS2 or NFS3 client
807 * @clp: nfs_client to initialise
808 * @timeparms: timeout parameters for underlying RPC transport
809 * @ip_addr: IP presentation address (not used)
810 * @authflavor: authentication flavor for underlying RPC transport
812 * Returns pointer to an NFS client, or an ERR_PTR value.
814 struct nfs_client
*nfs_init_client(struct nfs_client
*clp
,
815 const struct rpc_timeout
*timeparms
,
816 const char *ip_addr
, rpc_authflavor_t authflavour
)
820 if (clp
->cl_cons_state
== NFS_CS_READY
) {
821 /* the client is already initialised */
822 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
827 * Create a client RPC handle for doing FSSTAT with UNIX auth only
828 * - RFC 2623, sec 2.3.2
830 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
);
833 nfs_mark_client_ready(clp
, NFS_CS_READY
);
837 nfs_mark_client_ready(clp
, error
);
839 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
840 return ERR_PTR(error
);
844 * Create a version 2 or 3 client
846 static int nfs_init_server(struct nfs_server
*server
,
847 const struct nfs_parsed_mount_data
*data
)
849 struct nfs_client_initdata cl_init
= {
850 .hostname
= data
->nfs_server
.hostname
,
851 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
852 .addrlen
= data
->nfs_server
.addrlen
,
854 .proto
= data
->nfs_server
.protocol
,
857 struct rpc_timeout timeparms
;
858 struct nfs_client
*clp
;
861 dprintk("--> nfs_init_server()\n");
863 switch (data
->version
) {
866 cl_init
.rpc_ops
= &nfs_v2_clientops
;
871 cl_init
.rpc_ops
= &nfs_v3_clientops
;
875 return -EPROTONOSUPPORT
;
878 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
879 data
->timeo
, data
->retrans
);
880 if (data
->flags
& NFS_MOUNT_NORESVPORT
)
881 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
883 /* Allocate or find a client reference we can use */
884 clp
= nfs_get_client(&cl_init
, &timeparms
, NULL
, RPC_AUTH_UNIX
);
886 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
890 server
->nfs_client
= clp
;
892 /* Initialise the client representation from the mount data */
893 server
->flags
= data
->flags
;
894 server
->options
= data
->options
;
895 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
896 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
897 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
|NFS_CAP_CHANGE_ATTR
;
900 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
902 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
904 server
->acregmin
= data
->acregmin
* HZ
;
905 server
->acregmax
= data
->acregmax
* HZ
;
906 server
->acdirmin
= data
->acdirmin
* HZ
;
907 server
->acdirmax
= data
->acdirmax
* HZ
;
909 /* Start lockd here, before we might error out */
910 error
= nfs_start_lockd(server
);
914 server
->port
= data
->nfs_server
.port
;
916 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
920 /* Preserve the values of mount_server-related mount options */
921 if (data
->mount_server
.addrlen
) {
922 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
923 data
->mount_server
.addrlen
);
924 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
926 server
->mountd_version
= data
->mount_server
.version
;
927 server
->mountd_port
= data
->mount_server
.port
;
928 server
->mountd_protocol
= data
->mount_server
.protocol
;
930 server
->namelen
= data
->namlen
;
931 /* Create a client RPC handle for the NFSv3 ACL management interface */
932 nfs_init_server_aclclient(server
);
933 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
937 server
->nfs_client
= NULL
;
939 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
944 * Load up the server record from information gained in an fsinfo record
946 static void nfs_server_set_fsinfo(struct nfs_server
*server
,
947 struct nfs_fh
*mntfh
,
948 struct nfs_fsinfo
*fsinfo
)
950 unsigned long max_rpc_payload
;
952 /* Work out a lot of parameters */
953 if (server
->rsize
== 0)
954 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
955 if (server
->wsize
== 0)
956 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
958 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
959 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
960 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
961 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
963 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
964 if (server
->rsize
> max_rpc_payload
)
965 server
->rsize
= max_rpc_payload
;
966 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
967 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
968 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
970 server
->backing_dev_info
.name
= "nfs";
971 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
973 if (server
->wsize
> max_rpc_payload
)
974 server
->wsize
= max_rpc_payload
;
975 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
976 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
977 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
978 server
->pnfs_blksize
= fsinfo
->blksize
;
979 set_pnfs_layoutdriver(server
, mntfh
, fsinfo
->layouttype
);
981 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
983 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
984 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
985 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
986 if (server
->dtsize
> server
->rsize
)
987 server
->dtsize
= server
->rsize
;
989 if (server
->flags
& NFS_MOUNT_NOAC
) {
990 server
->acregmin
= server
->acregmax
= 0;
991 server
->acdirmin
= server
->acdirmax
= 0;
994 server
->maxfilesize
= fsinfo
->maxfilesize
;
996 server
->time_delta
= fsinfo
->time_delta
;
998 /* We're airborne Set socket buffersize */
999 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
1003 * Probe filesystem information, including the FSID on v2/v3
1005 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
1007 struct nfs_fsinfo fsinfo
;
1008 struct nfs_client
*clp
= server
->nfs_client
;
1011 dprintk("--> nfs_probe_fsinfo()\n");
1013 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
1014 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
1019 fsinfo
.fattr
= fattr
;
1020 fsinfo
.layouttype
= 0;
1021 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
1025 nfs_server_set_fsinfo(server
, mntfh
, &fsinfo
);
1027 /* Get some general file system info */
1028 if (server
->namelen
== 0) {
1029 struct nfs_pathconf pathinfo
;
1031 pathinfo
.fattr
= fattr
;
1032 nfs_fattr_init(fattr
);
1034 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
1035 server
->namelen
= pathinfo
.max_namelen
;
1038 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1042 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
1047 * Copy useful information when duplicating a server record
1049 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
1051 target
->flags
= source
->flags
;
1052 target
->rsize
= source
->rsize
;
1053 target
->wsize
= source
->wsize
;
1054 target
->acregmin
= source
->acregmin
;
1055 target
->acregmax
= source
->acregmax
;
1056 target
->acdirmin
= source
->acdirmin
;
1057 target
->acdirmax
= source
->acdirmax
;
1058 target
->caps
= source
->caps
;
1059 target
->options
= source
->options
;
1062 static void nfs_server_insert_lists(struct nfs_server
*server
)
1064 struct nfs_client
*clp
= server
->nfs_client
;
1065 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
1067 spin_lock(&nn
->nfs_client_lock
);
1068 list_add_tail_rcu(&server
->client_link
, &clp
->cl_superblocks
);
1069 list_add_tail(&server
->master_link
, &nn
->nfs_volume_list
);
1070 clear_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1071 spin_unlock(&nn
->nfs_client_lock
);
1075 static void nfs_server_remove_lists(struct nfs_server
*server
)
1077 struct nfs_client
*clp
= server
->nfs_client
;
1082 nn
= net_generic(clp
->cl_net
, nfs_net_id
);
1083 spin_lock(&nn
->nfs_client_lock
);
1084 list_del_rcu(&server
->client_link
);
1085 if (list_empty(&clp
->cl_superblocks
))
1086 set_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1087 list_del(&server
->master_link
);
1088 spin_unlock(&nn
->nfs_client_lock
);
1094 * Allocate and initialise a server record
1096 static struct nfs_server
*nfs_alloc_server(void)
1098 struct nfs_server
*server
;
1100 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1104 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
1106 /* Zero out the NFS state stuff */
1107 INIT_LIST_HEAD(&server
->client_link
);
1108 INIT_LIST_HEAD(&server
->master_link
);
1109 INIT_LIST_HEAD(&server
->delegations
);
1110 INIT_LIST_HEAD(&server
->layouts
);
1111 INIT_LIST_HEAD(&server
->state_owners_lru
);
1113 atomic_set(&server
->active
, 0);
1115 server
->io_stats
= nfs_alloc_iostats();
1116 if (!server
->io_stats
) {
1121 if (bdi_init(&server
->backing_dev_info
)) {
1122 nfs_free_iostats(server
->io_stats
);
1127 ida_init(&server
->openowner_id
);
1128 ida_init(&server
->lockowner_id
);
1129 pnfs_init_server(server
);
1135 * Free up a server record
1137 void nfs_free_server(struct nfs_server
*server
)
1139 dprintk("--> nfs_free_server()\n");
1141 nfs_server_remove_lists(server
);
1142 unset_pnfs_layoutdriver(server
);
1144 if (server
->destroy
!= NULL
)
1145 server
->destroy(server
);
1147 if (!IS_ERR(server
->client_acl
))
1148 rpc_shutdown_client(server
->client_acl
);
1149 if (!IS_ERR(server
->client
))
1150 rpc_shutdown_client(server
->client
);
1152 nfs_put_client(server
->nfs_client
);
1154 ida_destroy(&server
->lockowner_id
);
1155 ida_destroy(&server
->openowner_id
);
1156 nfs_free_iostats(server
->io_stats
);
1157 bdi_destroy(&server
->backing_dev_info
);
1159 nfs_release_automount_timer();
1160 dprintk("<-- nfs_free_server()\n");
1164 * Create a version 2 or 3 volume record
1165 * - keyed on server and FSID
1167 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1168 struct nfs_fh
*mntfh
)
1170 struct nfs_server
*server
;
1171 struct nfs_fattr
*fattr
;
1174 server
= nfs_alloc_server();
1176 return ERR_PTR(-ENOMEM
);
1179 fattr
= nfs_alloc_fattr();
1183 /* Get a client representation */
1184 error
= nfs_init_server(server
, data
);
1188 BUG_ON(!server
->nfs_client
);
1189 BUG_ON(!server
->nfs_client
->rpc_ops
);
1190 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1192 /* Probe the root fh to retrieve its FSID */
1193 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1196 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1197 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1198 server
->namelen
= NFS3_MAXNAMLEN
;
1199 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1200 server
->caps
|= NFS_CAP_READDIRPLUS
;
1202 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1203 server
->namelen
= NFS2_MAXNAMLEN
;
1206 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1207 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, fattr
);
1209 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1213 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1215 dprintk("Server FSID: %llx:%llx\n",
1216 (unsigned long long) server
->fsid
.major
,
1217 (unsigned long long) server
->fsid
.minor
);
1219 nfs_server_insert_lists(server
);
1220 server
->mount_time
= jiffies
;
1221 nfs_free_fattr(fattr
);
1225 nfs_free_fattr(fattr
);
1226 nfs_free_server(server
);
1227 return ERR_PTR(error
);
1230 #ifdef CONFIG_NFS_V4
1232 * NFSv4.0 callback thread helper
1234 * Find a client by callback identifier
1237 nfs4_find_client_ident(struct net
*net
, int cb_ident
)
1239 struct nfs_client
*clp
;
1240 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1242 spin_lock(&nn
->nfs_client_lock
);
1243 clp
= idr_find(&nn
->cb_ident_idr
, cb_ident
);
1245 atomic_inc(&clp
->cl_count
);
1246 spin_unlock(&nn
->nfs_client_lock
);
1250 #if defined(CONFIG_NFS_V4_1)
1252 * NFSv4.1 callback thread helper
1253 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1254 * minorversion, and sessionID
1256 * Returns NULL if no such client
1259 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
1260 struct nfs4_sessionid
*sid
)
1262 struct nfs_client
*clp
;
1263 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1265 spin_lock(&nn
->nfs_client_lock
);
1266 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
1267 if (nfs4_cb_match_client(addr
, clp
, 1) == false)
1270 if (!nfs4_has_session(clp
))
1273 /* Match sessionid*/
1274 if (memcmp(clp
->cl_session
->sess_id
.data
,
1275 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
1278 atomic_inc(&clp
->cl_count
);
1279 spin_unlock(&nn
->nfs_client_lock
);
1282 spin_unlock(&nn
->nfs_client_lock
);
1286 #else /* CONFIG_NFS_V4_1 */
1289 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
1290 struct nfs4_sessionid
*sid
)
1294 #endif /* CONFIG_NFS_V4_1 */
1297 * Initialize the NFS4 callback service
1299 static int nfs4_init_callback(struct nfs_client
*clp
)
1303 if (clp
->rpc_ops
->version
== 4) {
1304 struct rpc_xprt
*xprt
;
1306 xprt
= rcu_dereference_raw(clp
->cl_rpcclient
->cl_xprt
);
1308 if (nfs4_has_session(clp
)) {
1309 error
= xprt_setup_backchannel(xprt
,
1310 NFS41_BC_MIN_CALLBACKS
);
1315 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
, xprt
);
1317 dprintk("%s: failed to start callback. Error = %d\n",
1321 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
1327 * Initialize the minor version specific parts of an NFS4 client record
1329 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
1331 #if defined(CONFIG_NFS_V4_1)
1332 if (clp
->cl_mvops
->minor_version
) {
1333 struct nfs4_session
*session
= NULL
;
1335 * Create the session and mark it expired.
1336 * When a SEQUENCE operation encounters the expired session
1337 * it will do session recovery to initialize it.
1339 session
= nfs4_alloc_session(clp
);
1343 clp
->cl_session
= session
;
1345 * The create session reply races with the server back
1346 * channel probe. Mark the client NFS_CS_SESSION_INITING
1347 * so that the client back channel can find the
1350 nfs_mark_client_ready(clp
, NFS_CS_SESSION_INITING
);
1352 #endif /* CONFIG_NFS_V4_1 */
1354 return nfs4_init_callback(clp
);
1358 * nfs4_init_client - Initialise an NFS4 client record
1360 * @clp: nfs_client to initialise
1361 * @timeparms: timeout parameters for underlying RPC transport
1362 * @ip_addr: callback IP address in presentation format
1363 * @authflavor: authentication flavor for underlying RPC transport
1365 * Returns pointer to an NFS client, or an ERR_PTR value.
1367 struct nfs_client
*nfs4_init_client(struct nfs_client
*clp
,
1368 const struct rpc_timeout
*timeparms
,
1369 const char *ip_addr
,
1370 rpc_authflavor_t authflavour
)
1372 char buf
[INET6_ADDRSTRLEN
+ 1];
1375 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1376 /* the client is initialised already */
1377 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1381 /* Check NFS protocol revision and initialize RPC op vector */
1382 clp
->rpc_ops
= &nfs_v4_clientops
;
1384 __set_bit(NFS_CS_DISCRTRY
, &clp
->cl_flags
);
1385 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
);
1389 /* If no clientaddr= option was specified, find a usable cb address */
1390 if (ip_addr
== NULL
) {
1391 struct sockaddr_storage cb_addr
;
1392 struct sockaddr
*sap
= (struct sockaddr
*)&cb_addr
;
1394 error
= rpc_localaddr(clp
->cl_rpcclient
, sap
, sizeof(cb_addr
));
1397 error
= rpc_ntop(sap
, buf
, sizeof(buf
));
1400 ip_addr
= (const char *)buf
;
1402 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1404 error
= nfs_idmap_new(clp
);
1406 dprintk("%s: failed to create idmapper. Error = %d\n",
1410 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1412 error
= nfs4_init_client_minor_version(clp
);
1416 if (!nfs4_has_session(clp
))
1417 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1421 nfs_mark_client_ready(clp
, error
);
1422 nfs_put_client(clp
);
1423 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1424 return ERR_PTR(error
);
1428 * Set up an NFS4 client
1430 static int nfs4_set_client(struct nfs_server
*server
,
1431 const char *hostname
,
1432 const struct sockaddr
*addr
,
1433 const size_t addrlen
,
1434 const char *ip_addr
,
1435 rpc_authflavor_t authflavour
,
1436 int proto
, const struct rpc_timeout
*timeparms
,
1437 u32 minorversion
, struct net
*net
)
1439 struct nfs_client_initdata cl_init
= {
1440 .hostname
= hostname
,
1443 .rpc_ops
= &nfs_v4_clientops
,
1445 .minorversion
= minorversion
,
1448 struct nfs_client
*clp
;
1451 dprintk("--> nfs4_set_client()\n");
1453 if (server
->flags
& NFS_MOUNT_NORESVPORT
)
1454 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
1456 /* Allocate or find a client reference we can use */
1457 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
);
1459 error
= PTR_ERR(clp
);
1464 * Query for the lease time on clientid setup or renewal
1466 * Note that this will be set on nfs_clients that were created
1467 * only for the DS role and did not set this bit, but now will
1468 * serve a dual role.
1470 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
1472 server
->nfs_client
= clp
;
1473 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1476 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1481 * Set up a pNFS Data Server client.
1483 * Return any existing nfs_client that matches server address,port,version
1486 * For a new nfs_client, use a soft mount (default), a low retrans and a
1487 * low timeout interval so that if a connection is lost, we retry through
1490 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
1491 const struct sockaddr
*ds_addr
, int ds_addrlen
,
1492 int ds_proto
, unsigned int ds_timeo
, unsigned int ds_retrans
)
1494 struct nfs_client_initdata cl_init
= {
1496 .addrlen
= ds_addrlen
,
1497 .rpc_ops
= &nfs_v4_clientops
,
1499 .minorversion
= mds_clp
->cl_minorversion
,
1500 .net
= mds_clp
->cl_net
,
1502 struct rpc_timeout ds_timeout
;
1503 struct nfs_client
*clp
;
1506 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1507 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1508 * (section 13.1 RFC 5661).
1510 nfs_init_timeout_values(&ds_timeout
, ds_proto
, ds_timeo
, ds_retrans
);
1511 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
1512 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
);
1514 dprintk("<-- %s %p\n", __func__
, clp
);
1517 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
1520 * Session has been established, and the client marked ready.
1521 * Set the mount rsize and wsize with negotiated fore channel
1522 * attributes which will be bound checked in nfs_server_set_fsinfo.
1524 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1526 #ifdef CONFIG_NFS_V4_1
1527 struct nfs4_session
*sess
;
1531 if (!nfs4_has_session(server
->nfs_client
))
1533 sess
= server
->nfs_client
->cl_session
;
1534 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
1535 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
1537 if (server
->rsize
> server_resp_sz
)
1538 server
->rsize
= server_resp_sz
;
1539 if (server
->wsize
> server_rqst_sz
)
1540 server
->wsize
= server_rqst_sz
;
1541 #endif /* CONFIG_NFS_V4_1 */
1544 static int nfs4_server_common_setup(struct nfs_server
*server
,
1545 struct nfs_fh
*mntfh
)
1547 struct nfs_fattr
*fattr
;
1550 BUG_ON(!server
->nfs_client
);
1551 BUG_ON(!server
->nfs_client
->rpc_ops
);
1552 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1554 /* data servers support only a subset of NFSv4.1 */
1555 if (is_ds_only_client(server
->nfs_client
))
1556 return -EPROTONOSUPPORT
;
1558 fattr
= nfs_alloc_fattr();
1562 /* We must ensure the session is initialised first */
1563 error
= nfs4_init_session(server
);
1567 /* Probe the root fh to retrieve its FSID and filehandle */
1568 error
= nfs4_get_rootfh(server
, mntfh
);
1572 dprintk("Server FSID: %llx:%llx\n",
1573 (unsigned long long) server
->fsid
.major
,
1574 (unsigned long long) server
->fsid
.minor
);
1575 dprintk("Mount FH: %d\n", mntfh
->size
);
1577 nfs4_session_set_rwsize(server
);
1579 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1583 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1584 server
->namelen
= NFS4_MAXNAMLEN
;
1586 nfs_server_insert_lists(server
);
1587 server
->mount_time
= jiffies
;
1588 server
->destroy
= nfs4_destroy_server
;
1590 nfs_free_fattr(fattr
);
1595 * Create a version 4 volume record
1597 static int nfs4_init_server(struct nfs_server
*server
,
1598 const struct nfs_parsed_mount_data
*data
)
1600 struct rpc_timeout timeparms
;
1603 dprintk("--> nfs4_init_server()\n");
1605 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1606 data
->timeo
, data
->retrans
);
1608 /* Initialise the client representation from the mount data */
1609 server
->flags
= data
->flags
;
1610 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
|NFS_CAP_POSIX_LOCK
;
1611 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1612 server
->caps
|= NFS_CAP_READDIRPLUS
;
1613 server
->options
= data
->options
;
1615 /* Get a client record */
1616 error
= nfs4_set_client(server
,
1617 data
->nfs_server
.hostname
,
1618 (const struct sockaddr
*)&data
->nfs_server
.address
,
1619 data
->nfs_server
.addrlen
,
1620 data
->client_address
,
1621 data
->auth_flavors
[0],
1622 data
->nfs_server
.protocol
,
1630 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1633 if (nfs4_disable_idmapping
&& data
->auth_flavors
[0] == RPC_AUTH_UNIX
)
1634 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
1637 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1639 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1641 server
->acregmin
= data
->acregmin
* HZ
;
1642 server
->acregmax
= data
->acregmax
* HZ
;
1643 server
->acdirmin
= data
->acdirmin
* HZ
;
1644 server
->acdirmax
= data
->acdirmax
* HZ
;
1646 server
->port
= data
->nfs_server
.port
;
1648 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1652 dprintk("<-- nfs4_init_server() = %d\n", error
);
1657 * Create a version 4 volume record
1658 * - keyed on server and FSID
1660 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1661 struct nfs_fh
*mntfh
)
1663 struct nfs_server
*server
;
1666 dprintk("--> nfs4_create_server()\n");
1668 server
= nfs_alloc_server();
1670 return ERR_PTR(-ENOMEM
);
1672 /* set up the general RPC client */
1673 error
= nfs4_init_server(server
, data
);
1677 error
= nfs4_server_common_setup(server
, mntfh
);
1681 dprintk("<-- nfs4_create_server() = %p\n", server
);
1685 nfs_free_server(server
);
1686 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1687 return ERR_PTR(error
);
1691 * Create an NFS4 referral server record
1693 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1694 struct nfs_fh
*mntfh
)
1696 struct nfs_client
*parent_client
;
1697 struct nfs_server
*server
, *parent_server
;
1700 dprintk("--> nfs4_create_referral_server()\n");
1702 server
= nfs_alloc_server();
1704 return ERR_PTR(-ENOMEM
);
1706 parent_server
= NFS_SB(data
->sb
);
1707 parent_client
= parent_server
->nfs_client
;
1709 /* Initialise the client representation from the parent server */
1710 nfs_server_copy_userdata(server
, parent_server
);
1711 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1713 /* Get a client representation.
1714 * Note: NFSv4 always uses TCP, */
1715 error
= nfs4_set_client(server
, data
->hostname
,
1718 parent_client
->cl_ipaddr
,
1720 rpc_protocol(parent_server
->client
),
1721 parent_server
->client
->cl_timeout
,
1722 parent_client
->cl_mvops
->minor_version
,
1723 parent_client
->cl_net
);
1727 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1731 error
= nfs4_server_common_setup(server
, mntfh
);
1735 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1739 nfs_free_server(server
);
1740 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1741 return ERR_PTR(error
);
1744 #endif /* CONFIG_NFS_V4 */
1747 * Clone an NFS2, NFS3 or NFS4 server record
1749 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1751 struct nfs_fattr
*fattr
,
1752 rpc_authflavor_t flavor
)
1754 struct nfs_server
*server
;
1755 struct nfs_fattr
*fattr_fsinfo
;
1758 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1759 (unsigned long long) fattr
->fsid
.major
,
1760 (unsigned long long) fattr
->fsid
.minor
);
1762 server
= nfs_alloc_server();
1764 return ERR_PTR(-ENOMEM
);
1767 fattr_fsinfo
= nfs_alloc_fattr();
1768 if (fattr_fsinfo
== NULL
)
1769 goto out_free_server
;
1771 /* Copy data from the source */
1772 server
->nfs_client
= source
->nfs_client
;
1773 server
->destroy
= source
->destroy
;
1774 atomic_inc(&server
->nfs_client
->cl_count
);
1775 nfs_server_copy_userdata(server
, source
);
1777 server
->fsid
= fattr
->fsid
;
1779 error
= nfs_init_server_rpcclient(server
,
1780 source
->client
->cl_timeout
,
1783 goto out_free_server
;
1784 if (!IS_ERR(source
->client_acl
))
1785 nfs_init_server_aclclient(server
);
1787 /* probe the filesystem info for this server filesystem */
1788 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1790 goto out_free_server
;
1792 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1793 server
->namelen
= NFS4_MAXNAMLEN
;
1795 dprintk("Cloned FSID: %llx:%llx\n",
1796 (unsigned long long) server
->fsid
.major
,
1797 (unsigned long long) server
->fsid
.minor
);
1799 error
= nfs_start_lockd(server
);
1801 goto out_free_server
;
1803 nfs_server_insert_lists(server
);
1804 server
->mount_time
= jiffies
;
1806 nfs_free_fattr(fattr_fsinfo
);
1807 dprintk("<-- nfs_clone_server() = %p\n", server
);
1811 nfs_free_fattr(fattr_fsinfo
);
1812 nfs_free_server(server
);
1813 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1814 return ERR_PTR(error
);
1817 void nfs_clients_init(struct net
*net
)
1819 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1821 INIT_LIST_HEAD(&nn
->nfs_client_list
);
1822 INIT_LIST_HEAD(&nn
->nfs_volume_list
);
1823 #ifdef CONFIG_NFS_V4
1824 idr_init(&nn
->cb_ident_idr
);
1826 spin_lock_init(&nn
->nfs_client_lock
);
1827 nn
->boot_time
= CURRENT_TIME
;
1830 #ifdef CONFIG_PROC_FS
1831 static struct proc_dir_entry
*proc_fs_nfs
;
1833 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1834 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1835 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1836 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1837 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1839 static const struct seq_operations nfs_server_list_ops
= {
1840 .start
= nfs_server_list_start
,
1841 .next
= nfs_server_list_next
,
1842 .stop
= nfs_server_list_stop
,
1843 .show
= nfs_server_list_show
,
1846 static const struct file_operations nfs_server_list_fops
= {
1847 .open
= nfs_server_list_open
,
1849 .llseek
= seq_lseek
,
1850 .release
= seq_release
,
1851 .owner
= THIS_MODULE
,
1854 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1855 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1856 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1857 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1858 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1860 static const struct seq_operations nfs_volume_list_ops
= {
1861 .start
= nfs_volume_list_start
,
1862 .next
= nfs_volume_list_next
,
1863 .stop
= nfs_volume_list_stop
,
1864 .show
= nfs_volume_list_show
,
1867 static const struct file_operations nfs_volume_list_fops
= {
1868 .open
= nfs_volume_list_open
,
1870 .llseek
= seq_lseek
,
1871 .release
= seq_release
,
1872 .owner
= THIS_MODULE
,
1876 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1879 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1883 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1884 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1886 ret
= seq_open(file
, &nfs_server_list_ops
);
1890 m
= file
->private_data
;
1897 * set up the iterator to start reading from the server list and return the first item
1899 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1901 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1903 /* lock the list against modification */
1904 spin_lock(&nn
->nfs_client_lock
);
1905 return seq_list_start_head(&nn
->nfs_client_list
, *_pos
);
1909 * move to next server
1911 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1913 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1915 return seq_list_next(v
, &nn
->nfs_client_list
, pos
);
1919 * clean up after reading from the transports list
1921 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1923 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1925 spin_unlock(&nn
->nfs_client_lock
);
1929 * display a header line followed by a load of call lines
1931 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1933 struct nfs_client
*clp
;
1934 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1936 /* display header on line 1 */
1937 if (v
== &nn
->nfs_client_list
) {
1938 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1942 /* display one transport per line on subsequent lines */
1943 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1945 /* Check if the client is initialized */
1946 if (clp
->cl_cons_state
!= NFS_CS_READY
)
1950 seq_printf(m
, "v%u %s %s %3d %s\n",
1951 clp
->rpc_ops
->version
,
1952 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1953 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1954 atomic_read(&clp
->cl_count
),
1962 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1964 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1968 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1969 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1971 ret
= seq_open(file
, &nfs_volume_list_ops
);
1975 m
= file
->private_data
;
1982 * set up the iterator to start reading from the volume list and return the first item
1984 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1986 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1988 /* lock the list against modification */
1989 spin_lock(&nn
->nfs_client_lock
);
1990 return seq_list_start_head(&nn
->nfs_volume_list
, *_pos
);
1994 * move to next volume
1996 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1998 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
2000 return seq_list_next(v
, &nn
->nfs_volume_list
, pos
);
2004 * clean up after reading from the transports list
2006 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
2008 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
2010 spin_unlock(&nn
->nfs_client_lock
);
2014 * display a header line followed by a load of call lines
2016 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
2018 struct nfs_server
*server
;
2019 struct nfs_client
*clp
;
2020 char dev
[8], fsid
[17];
2021 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
2023 /* display header on line 1 */
2024 if (v
== &nn
->nfs_volume_list
) {
2025 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
2028 /* display one transport per line on subsequent lines */
2029 server
= list_entry(v
, struct nfs_server
, master_link
);
2030 clp
= server
->nfs_client
;
2032 snprintf(dev
, 8, "%u:%u",
2033 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
2035 snprintf(fsid
, 17, "%llx:%llx",
2036 (unsigned long long) server
->fsid
.major
,
2037 (unsigned long long) server
->fsid
.minor
);
2040 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
2041 clp
->rpc_ops
->version
,
2042 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
2043 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
2046 nfs_server_fscache_state(server
));
2053 * initialise the /proc/fs/nfsfs/ directory
2055 int __init
nfs_fs_proc_init(void)
2057 struct proc_dir_entry
*p
;
2059 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
2063 /* a file of servers with which we're dealing */
2064 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
2065 proc_fs_nfs
, &nfs_server_list_fops
);
2069 /* a file of volumes that we have mounted */
2070 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
2071 proc_fs_nfs
, &nfs_volume_list_fops
);
2077 remove_proc_entry("servers", proc_fs_nfs
);
2079 remove_proc_entry("fs/nfsfs", NULL
);
2085 * clean up the /proc/fs/nfsfs/ directory
2087 void nfs_fs_proc_exit(void)
2089 remove_proc_entry("volumes", proc_fs_nfs
);
2090 remove_proc_entry("servers", proc_fs_nfs
);
2091 remove_proc_entry("fs/nfsfs", NULL
);
2094 #endif /* CONFIG_PROC_FS */
2096 module_param(nfs4_disable_idmapping
, bool, 0644);
2097 MODULE_PARM_DESC(nfs4_disable_idmapping
,
2098 "Turn off NFSv4 idmapping when using 'sec=sys'");