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 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
);
180 cred
= rpc_lookup_machine_cred("*");
182 clp
->cl_machine_cred
= cred
;
183 nfs_fscache_get_client_cookie(clp
);
194 #ifdef CONFIG_NFS_V4_1
195 static void nfs4_shutdown_session(struct nfs_client
*clp
)
197 if (nfs4_has_session(clp
)) {
198 nfs4_destroy_session(clp
->cl_session
);
199 nfs4_destroy_clientid(clp
);
203 #else /* CONFIG_NFS_V4_1 */
204 static void nfs4_shutdown_session(struct nfs_client
*clp
)
207 #endif /* CONFIG_NFS_V4_1 */
209 struct nfs_client
*nfs4_alloc_client(const struct nfs_client_initdata
*cl_init
)
212 struct nfs_client
*clp
= nfs_alloc_client(cl_init
);
216 err
= nfs_get_cb_ident_idr(clp
, cl_init
->minorversion
);
220 spin_lock_init(&clp
->cl_lock
);
221 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
222 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
223 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
224 clp
->cl_minorversion
= cl_init
->minorversion
;
225 clp
->cl_mvops
= nfs_v4_minor_ops
[cl_init
->minorversion
];
234 * Destroy the NFS4 callback service
236 static void nfs4_destroy_callback(struct nfs_client
*clp
)
238 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
239 nfs_callback_down(clp
->cl_mvops
->minor_version
);
242 static void nfs4_shutdown_client(struct nfs_client
*clp
)
244 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
245 nfs4_kill_renewd(clp
);
246 nfs4_shutdown_session(clp
);
247 nfs4_destroy_callback(clp
);
248 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
249 nfs_idmap_delete(clp
);
251 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
252 kfree(clp
->cl_serverowner
);
253 kfree(clp
->cl_serverscope
);
254 kfree(clp
->cl_implid
);
257 void nfs4_free_client(struct nfs_client
*clp
)
259 nfs4_shutdown_client(clp
);
260 nfs_free_client(clp
);
263 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
264 void nfs_cleanup_cb_ident_idr(struct net
*net
)
266 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
268 idr_destroy(&nn
->cb_ident_idr
);
271 /* nfs_client_lock held */
272 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
274 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
276 if (clp
->cl_cb_ident
)
277 idr_remove(&nn
->cb_ident_idr
, clp
->cl_cb_ident
);
280 static void pnfs_init_server(struct nfs_server
*server
)
282 rpc_init_wait_queue(&server
->roc_rpcwaitq
, "pNFS ROC");
285 static void nfs4_destroy_server(struct nfs_server
*server
)
287 nfs_server_return_all_delegations(server
);
288 unset_pnfs_layoutdriver(server
);
289 nfs4_purge_state_owners(server
);
293 void nfs_cleanup_cb_ident_idr(struct net
*net
)
297 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
301 static void pnfs_init_server(struct nfs_server
*server
)
305 #endif /* CONFIG_NFS_V4 */
308 * Destroy a shared client record
310 void nfs_free_client(struct nfs_client
*clp
)
312 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
314 nfs_fscache_release_client_cookie(clp
);
316 /* -EIO all pending I/O */
317 if (!IS_ERR(clp
->cl_rpcclient
))
318 rpc_shutdown_client(clp
->cl_rpcclient
);
320 if (clp
->cl_machine_cred
!= NULL
)
321 put_rpccred(clp
->cl_machine_cred
);
323 put_net(clp
->cl_net
);
324 kfree(clp
->cl_hostname
);
327 dprintk("<-- nfs_free_client()\n");
331 * Release a reference to a shared client record
333 void nfs_put_client(struct nfs_client
*clp
)
340 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
341 nn
= net_generic(clp
->cl_net
, nfs_net_id
);
343 if (atomic_dec_and_lock(&clp
->cl_count
, &nn
->nfs_client_lock
)) {
344 list_del(&clp
->cl_share_link
);
345 nfs_cb_idr_remove_locked(clp
);
346 spin_unlock(&nn
->nfs_client_lock
);
348 BUG_ON(!list_empty(&clp
->cl_superblocks
));
350 clp
->rpc_ops
->free_client(clp
);
353 EXPORT_SYMBOL_GPL(nfs_put_client
);
355 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
357 * Test if two ip6 socket addresses refer to the same socket by
358 * comparing relevant fields. The padding bytes specifically, are not
359 * compared. sin6_flowinfo is not compared because it only affects QoS
360 * and sin6_scope_id is only compared if the address is "link local"
361 * because "link local" addresses need only be unique to a specific
362 * link. Conversely, ordinary unicast addresses might have different
365 * The caller should ensure both socket addresses are AF_INET6.
367 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
368 const struct sockaddr
*sa2
)
370 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
371 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
373 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
375 else if (ipv6_addr_type(&sin1
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
376 return sin1
->sin6_scope_id
== sin2
->sin6_scope_id
;
380 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
381 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
382 const struct sockaddr
*sa2
)
389 * Test if two ip4 socket addresses refer to the same socket, by
390 * comparing relevant fields. The padding bytes specifically, are
393 * The caller should ensure both socket addresses are AF_INET.
395 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
396 const struct sockaddr
*sa2
)
398 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
399 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
401 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
404 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
405 const struct sockaddr
*sa2
)
407 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
408 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
410 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
411 (sin1
->sin6_port
== sin2
->sin6_port
);
414 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
415 const struct sockaddr
*sa2
)
417 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
418 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
420 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
421 (sin1
->sin_port
== sin2
->sin_port
);
424 #if defined(CONFIG_NFS_V4_1)
426 * Test if two socket addresses represent the same actual socket,
427 * by comparing (only) relevant fields, excluding the port number.
429 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
430 const struct sockaddr
*sa2
)
432 if (sa1
->sa_family
!= sa2
->sa_family
)
435 switch (sa1
->sa_family
) {
437 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
439 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
443 #endif /* CONFIG_NFS_V4_1 */
446 * Test if two socket addresses represent the same actual socket,
447 * by comparing (only) relevant fields, including the port number.
449 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
450 const struct sockaddr
*sa2
)
452 if (sa1
->sa_family
!= sa2
->sa_family
)
455 switch (sa1
->sa_family
) {
457 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
459 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
464 #if defined(CONFIG_NFS_V4_1)
465 /* Common match routine for v4.0 and v4.1 callback services */
466 static bool nfs4_cb_match_client(const struct sockaddr
*addr
,
467 struct nfs_client
*clp
, u32 minorversion
)
469 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
471 /* Don't match clients that failed to initialise */
472 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
473 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
478 /* Match the version and minorversion */
479 if (clp
->rpc_ops
->version
!= 4 ||
480 clp
->cl_minorversion
!= minorversion
)
483 /* Match only the IP address, not the port number */
484 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
489 #endif /* CONFIG_NFS_V4_1 */
492 * Find an nfs_client on the list that matches the initialisation data
495 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
497 struct nfs_client
*clp
;
498 const struct sockaddr
*sap
= data
->addr
;
499 struct nfs_net
*nn
= net_generic(data
->net
, nfs_net_id
);
501 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
502 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
503 /* Don't match clients that failed to initialise properly */
504 if (clp
->cl_cons_state
< 0)
507 /* Different NFS versions cannot share the same nfs_client */
508 if (clp
->rpc_ops
!= data
->rpc_ops
)
511 if (clp
->cl_proto
!= data
->proto
)
513 /* Match nfsv4 minorversion */
514 if (clp
->cl_minorversion
!= data
->minorversion
)
516 /* Match the full socket address */
517 if (!nfs_sockaddr_cmp(sap
, clap
))
520 atomic_inc(&clp
->cl_count
);
526 static bool nfs_client_init_is_complete(const struct nfs_client
*clp
)
528 return clp
->cl_cons_state
!= NFS_CS_INITING
;
531 int nfs_wait_client_init_complete(const struct nfs_client
*clp
)
533 return wait_event_killable(nfs_client_active_wq
,
534 nfs_client_init_is_complete(clp
));
538 * Found an existing client. Make sure it's ready before returning.
540 static struct nfs_client
*
541 nfs_found_client(const struct nfs_client_initdata
*cl_init
,
542 struct nfs_client
*clp
)
546 error
= nfs_wait_client_init_complete(clp
);
549 return ERR_PTR(-ERESTARTSYS
);
552 if (clp
->cl_cons_state
< NFS_CS_READY
) {
553 error
= clp
->cl_cons_state
;
555 return ERR_PTR(error
);
560 dprintk("<-- %s found nfs_client %p for %s\n",
561 __func__
, clp
, cl_init
->hostname
?: "");
566 * Look up a client by IP address and protocol version
567 * - creates a new record if one doesn't yet exist
569 static struct nfs_client
*
570 nfs_get_client(const struct nfs_client_initdata
*cl_init
,
571 const struct rpc_timeout
*timeparms
,
573 rpc_authflavor_t authflavour
)
575 struct nfs_client
*clp
, *new = NULL
;
576 struct nfs_net
*nn
= net_generic(cl_init
->net
, nfs_net_id
);
578 dprintk("--> nfs_get_client(%s,v%u)\n",
579 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
581 /* see if the client already exists */
583 spin_lock(&nn
->nfs_client_lock
);
585 clp
= nfs_match_client(cl_init
);
587 spin_unlock(&nn
->nfs_client_lock
);
589 new->rpc_ops
->free_client(new);
590 return nfs_found_client(cl_init
, clp
);
593 list_add(&new->cl_share_link
, &nn
->nfs_client_list
);
594 spin_unlock(&nn
->nfs_client_lock
);
595 new->cl_flags
= cl_init
->init_flags
;
596 return cl_init
->rpc_ops
->init_client(new,
601 spin_unlock(&nn
->nfs_client_lock
);
603 new = cl_init
->rpc_ops
->alloc_client(cl_init
);
604 } while (!IS_ERR(new));
606 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
607 cl_init
->hostname
?: "", PTR_ERR(new));
612 * Mark a server as ready or failed
614 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
617 clp
->cl_cons_state
= state
;
618 wake_up_all(&nfs_client_active_wq
);
622 * Initialise the timeout values for a connection
624 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
625 unsigned int timeo
, unsigned int retrans
)
627 to
->to_initval
= timeo
* HZ
/ 10;
628 to
->to_retries
= retrans
;
631 case XPRT_TRANSPORT_TCP
:
632 case XPRT_TRANSPORT_RDMA
:
633 if (to
->to_retries
== 0)
634 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
635 if (to
->to_initval
== 0)
636 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
637 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
638 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
639 to
->to_increment
= to
->to_initval
;
640 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
641 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
642 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
643 if (to
->to_maxval
< to
->to_initval
)
644 to
->to_maxval
= to
->to_initval
;
645 to
->to_exponential
= 0;
647 case XPRT_TRANSPORT_UDP
:
648 if (to
->to_retries
== 0)
649 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
651 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
652 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
653 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
654 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
655 to
->to_exponential
= 1;
663 * Create an RPC client handle
665 int nfs_create_rpc_client(struct nfs_client
*clp
,
666 const struct rpc_timeout
*timeparms
,
667 rpc_authflavor_t flavor
)
669 struct rpc_clnt
*clnt
= NULL
;
670 struct rpc_create_args args
= {
672 .protocol
= clp
->cl_proto
,
673 .address
= (struct sockaddr
*)&clp
->cl_addr
,
674 .addrsize
= clp
->cl_addrlen
,
675 .timeout
= timeparms
,
676 .servername
= clp
->cl_hostname
,
677 .program
= &nfs_program
,
678 .version
= clp
->rpc_ops
->version
,
679 .authflavor
= flavor
,
682 if (test_bit(NFS_CS_DISCRTRY
, &clp
->cl_flags
))
683 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
684 if (test_bit(NFS_CS_NORESVPORT
, &clp
->cl_flags
))
685 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
687 if (!IS_ERR(clp
->cl_rpcclient
))
690 clnt
= rpc_create(&args
);
692 dprintk("%s: cannot create RPC client. Error = %ld\n",
693 __func__
, PTR_ERR(clnt
));
694 return PTR_ERR(clnt
);
697 clp
->cl_rpcclient
= clnt
;
702 * Version 2 or 3 client destruction
704 static void nfs_destroy_server(struct nfs_server
*server
)
706 if (!(server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) ||
707 !(server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
708 nlmclnt_done(server
->nlm_host
);
712 * Version 2 or 3 lockd setup
714 static int nfs_start_lockd(struct nfs_server
*server
)
716 struct nlm_host
*host
;
717 struct nfs_client
*clp
= server
->nfs_client
;
718 struct nlmclnt_initdata nlm_init
= {
719 .hostname
= clp
->cl_hostname
,
720 .address
= (struct sockaddr
*)&clp
->cl_addr
,
721 .addrlen
= clp
->cl_addrlen
,
722 .nfs_version
= clp
->rpc_ops
->version
,
723 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
728 if (nlm_init
.nfs_version
> 3)
730 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
731 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
734 switch (clp
->cl_proto
) {
736 nlm_init
.protocol
= IPPROTO_TCP
;
738 case XPRT_TRANSPORT_UDP
:
739 nlm_init
.protocol
= IPPROTO_UDP
;
742 host
= nlmclnt_init(&nlm_init
);
744 return PTR_ERR(host
);
746 server
->nlm_host
= host
;
747 server
->destroy
= nfs_destroy_server
;
752 * Initialise an NFSv3 ACL client connection
754 #ifdef CONFIG_NFS_V3_ACL
755 static void nfs_init_server_aclclient(struct nfs_server
*server
)
757 if (server
->nfs_client
->rpc_ops
->version
!= 3)
759 if (server
->flags
& NFS_MOUNT_NOACL
)
762 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
763 if (IS_ERR(server
->client_acl
))
766 /* No errors! Assume that Sun nfsacls are supported */
767 server
->caps
|= NFS_CAP_ACLS
;
771 server
->caps
&= ~NFS_CAP_ACLS
;
774 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
776 server
->flags
&= ~NFS_MOUNT_NOACL
;
777 server
->caps
&= ~NFS_CAP_ACLS
;
782 * Create a general RPC client
784 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
785 const struct rpc_timeout
*timeo
,
786 rpc_authflavor_t pseudoflavour
)
788 struct nfs_client
*clp
= server
->nfs_client
;
790 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
791 if (IS_ERR(server
->client
)) {
792 dprintk("%s: couldn't create rpc_client!\n", __func__
);
793 return PTR_ERR(server
->client
);
796 memcpy(&server
->client
->cl_timeout_default
,
798 sizeof(server
->client
->cl_timeout_default
));
799 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
801 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
802 struct rpc_auth
*auth
;
804 auth
= rpcauth_create(pseudoflavour
, server
->client
);
806 dprintk("%s: couldn't create credcache!\n", __func__
);
807 return PTR_ERR(auth
);
810 server
->client
->cl_softrtry
= 0;
811 if (server
->flags
& NFS_MOUNT_SOFT
)
812 server
->client
->cl_softrtry
= 1;
818 * nfs_init_client - Initialise an NFS2 or NFS3 client
820 * @clp: nfs_client to initialise
821 * @timeparms: timeout parameters for underlying RPC transport
822 * @ip_addr: IP presentation address (not used)
823 * @authflavor: authentication flavor for underlying RPC transport
825 * Returns pointer to an NFS client, or an ERR_PTR value.
827 struct nfs_client
*nfs_init_client(struct nfs_client
*clp
,
828 const struct rpc_timeout
*timeparms
,
829 const char *ip_addr
, rpc_authflavor_t authflavour
)
833 if (clp
->cl_cons_state
== NFS_CS_READY
) {
834 /* the client is already initialised */
835 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
840 * Create a client RPC handle for doing FSSTAT with UNIX auth only
841 * - RFC 2623, sec 2.3.2
843 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
);
846 nfs_mark_client_ready(clp
, NFS_CS_READY
);
850 nfs_mark_client_ready(clp
, error
);
852 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
853 return ERR_PTR(error
);
857 * Create a version 2 or 3 client
859 static int nfs_init_server(struct nfs_server
*server
,
860 const struct nfs_parsed_mount_data
*data
)
862 struct nfs_client_initdata cl_init
= {
863 .hostname
= data
->nfs_server
.hostname
,
864 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
865 .addrlen
= data
->nfs_server
.addrlen
,
867 .proto
= data
->nfs_server
.protocol
,
870 struct rpc_timeout timeparms
;
871 struct nfs_client
*clp
;
874 dprintk("--> nfs_init_server()\n");
876 switch (data
->version
) {
879 cl_init
.rpc_ops
= &nfs_v2_clientops
;
884 cl_init
.rpc_ops
= &nfs_v3_clientops
;
888 return -EPROTONOSUPPORT
;
891 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
892 data
->timeo
, data
->retrans
);
893 if (data
->flags
& NFS_MOUNT_NORESVPORT
)
894 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
896 /* Allocate or find a client reference we can use */
897 clp
= nfs_get_client(&cl_init
, &timeparms
, NULL
, RPC_AUTH_UNIX
);
899 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
903 server
->nfs_client
= clp
;
905 /* Initialise the client representation from the mount data */
906 server
->flags
= data
->flags
;
907 server
->options
= data
->options
;
908 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
909 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
910 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
|NFS_CAP_CHANGE_ATTR
;
913 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
915 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
917 server
->acregmin
= data
->acregmin
* HZ
;
918 server
->acregmax
= data
->acregmax
* HZ
;
919 server
->acdirmin
= data
->acdirmin
* HZ
;
920 server
->acdirmax
= data
->acdirmax
* HZ
;
922 /* Start lockd here, before we might error out */
923 error
= nfs_start_lockd(server
);
927 server
->port
= data
->nfs_server
.port
;
929 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
933 /* Preserve the values of mount_server-related mount options */
934 if (data
->mount_server
.addrlen
) {
935 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
936 data
->mount_server
.addrlen
);
937 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
939 server
->mountd_version
= data
->mount_server
.version
;
940 server
->mountd_port
= data
->mount_server
.port
;
941 server
->mountd_protocol
= data
->mount_server
.protocol
;
943 server
->namelen
= data
->namlen
;
944 /* Create a client RPC handle for the NFSv3 ACL management interface */
945 nfs_init_server_aclclient(server
);
946 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
950 server
->nfs_client
= NULL
;
952 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
957 * Load up the server record from information gained in an fsinfo record
959 static void nfs_server_set_fsinfo(struct nfs_server
*server
,
960 struct nfs_fh
*mntfh
,
961 struct nfs_fsinfo
*fsinfo
)
963 unsigned long max_rpc_payload
;
965 /* Work out a lot of parameters */
966 if (server
->rsize
== 0)
967 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
968 if (server
->wsize
== 0)
969 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
971 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
972 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
973 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
974 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
976 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
977 if (server
->rsize
> max_rpc_payload
)
978 server
->rsize
= max_rpc_payload
;
979 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
980 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
981 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
983 server
->backing_dev_info
.name
= "nfs";
984 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
986 if (server
->wsize
> max_rpc_payload
)
987 server
->wsize
= max_rpc_payload
;
988 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
989 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
990 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
991 server
->pnfs_blksize
= fsinfo
->blksize
;
993 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
995 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
996 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
997 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
998 if (server
->dtsize
> server
->rsize
)
999 server
->dtsize
= server
->rsize
;
1001 if (server
->flags
& NFS_MOUNT_NOAC
) {
1002 server
->acregmin
= server
->acregmax
= 0;
1003 server
->acdirmin
= server
->acdirmax
= 0;
1006 server
->maxfilesize
= fsinfo
->maxfilesize
;
1008 server
->time_delta
= fsinfo
->time_delta
;
1010 /* We're airborne Set socket buffersize */
1011 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
1015 * Probe filesystem information, including the FSID on v2/v3
1017 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
1019 struct nfs_fsinfo fsinfo
;
1020 struct nfs_client
*clp
= server
->nfs_client
;
1023 dprintk("--> nfs_probe_fsinfo()\n");
1025 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
1026 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
1031 fsinfo
.fattr
= fattr
;
1032 fsinfo
.layouttype
= 0;
1033 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
1037 nfs_server_set_fsinfo(server
, mntfh
, &fsinfo
);
1039 /* Get some general file system info */
1040 if (server
->namelen
== 0) {
1041 struct nfs_pathconf pathinfo
;
1043 pathinfo
.fattr
= fattr
;
1044 nfs_fattr_init(fattr
);
1046 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
1047 server
->namelen
= pathinfo
.max_namelen
;
1050 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1054 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
1059 * Copy useful information when duplicating a server record
1061 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
1063 target
->flags
= source
->flags
;
1064 target
->rsize
= source
->rsize
;
1065 target
->wsize
= source
->wsize
;
1066 target
->acregmin
= source
->acregmin
;
1067 target
->acregmax
= source
->acregmax
;
1068 target
->acdirmin
= source
->acdirmin
;
1069 target
->acdirmax
= source
->acdirmax
;
1070 target
->caps
= source
->caps
;
1071 target
->options
= source
->options
;
1074 static void nfs_server_insert_lists(struct nfs_server
*server
)
1076 struct nfs_client
*clp
= server
->nfs_client
;
1077 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
1079 spin_lock(&nn
->nfs_client_lock
);
1080 list_add_tail_rcu(&server
->client_link
, &clp
->cl_superblocks
);
1081 list_add_tail(&server
->master_link
, &nn
->nfs_volume_list
);
1082 clear_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1083 spin_unlock(&nn
->nfs_client_lock
);
1087 static void nfs_server_remove_lists(struct nfs_server
*server
)
1089 struct nfs_client
*clp
= server
->nfs_client
;
1094 nn
= net_generic(clp
->cl_net
, nfs_net_id
);
1095 spin_lock(&nn
->nfs_client_lock
);
1096 list_del_rcu(&server
->client_link
);
1097 if (list_empty(&clp
->cl_superblocks
))
1098 set_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1099 list_del(&server
->master_link
);
1100 spin_unlock(&nn
->nfs_client_lock
);
1106 * Allocate and initialise a server record
1108 static struct nfs_server
*nfs_alloc_server(void)
1110 struct nfs_server
*server
;
1112 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1116 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
1118 /* Zero out the NFS state stuff */
1119 INIT_LIST_HEAD(&server
->client_link
);
1120 INIT_LIST_HEAD(&server
->master_link
);
1121 INIT_LIST_HEAD(&server
->delegations
);
1122 INIT_LIST_HEAD(&server
->layouts
);
1123 INIT_LIST_HEAD(&server
->state_owners_lru
);
1125 atomic_set(&server
->active
, 0);
1127 server
->io_stats
= nfs_alloc_iostats();
1128 if (!server
->io_stats
) {
1133 if (bdi_init(&server
->backing_dev_info
)) {
1134 nfs_free_iostats(server
->io_stats
);
1139 ida_init(&server
->openowner_id
);
1140 ida_init(&server
->lockowner_id
);
1141 pnfs_init_server(server
);
1147 * Free up a server record
1149 void nfs_free_server(struct nfs_server
*server
)
1151 dprintk("--> nfs_free_server()\n");
1153 nfs_server_remove_lists(server
);
1155 if (server
->destroy
!= NULL
)
1156 server
->destroy(server
);
1158 if (!IS_ERR(server
->client_acl
))
1159 rpc_shutdown_client(server
->client_acl
);
1160 if (!IS_ERR(server
->client
))
1161 rpc_shutdown_client(server
->client
);
1163 nfs_put_client(server
->nfs_client
);
1165 ida_destroy(&server
->lockowner_id
);
1166 ida_destroy(&server
->openowner_id
);
1167 nfs_free_iostats(server
->io_stats
);
1168 bdi_destroy(&server
->backing_dev_info
);
1170 nfs_release_automount_timer();
1171 dprintk("<-- nfs_free_server()\n");
1175 * Create a version 2 or 3 volume record
1176 * - keyed on server and FSID
1178 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1179 struct nfs_fh
*mntfh
)
1181 struct nfs_server
*server
;
1182 struct nfs_fattr
*fattr
;
1185 server
= nfs_alloc_server();
1187 return ERR_PTR(-ENOMEM
);
1190 fattr
= nfs_alloc_fattr();
1194 /* Get a client representation */
1195 error
= nfs_init_server(server
, data
);
1199 BUG_ON(!server
->nfs_client
);
1200 BUG_ON(!server
->nfs_client
->rpc_ops
);
1201 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1203 /* Probe the root fh to retrieve its FSID */
1204 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1207 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1208 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1209 server
->namelen
= NFS3_MAXNAMLEN
;
1210 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1211 server
->caps
|= NFS_CAP_READDIRPLUS
;
1213 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1214 server
->namelen
= NFS2_MAXNAMLEN
;
1217 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1218 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, fattr
);
1220 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1224 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1226 dprintk("Server FSID: %llx:%llx\n",
1227 (unsigned long long) server
->fsid
.major
,
1228 (unsigned long long) server
->fsid
.minor
);
1230 nfs_server_insert_lists(server
);
1231 server
->mount_time
= jiffies
;
1232 nfs_free_fattr(fattr
);
1236 nfs_free_fattr(fattr
);
1237 nfs_free_server(server
);
1238 return ERR_PTR(error
);
1241 #ifdef CONFIG_NFS_V4
1243 * NFSv4.0 callback thread helper
1245 * Find a client by callback identifier
1248 nfs4_find_client_ident(struct net
*net
, int cb_ident
)
1250 struct nfs_client
*clp
;
1251 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1253 spin_lock(&nn
->nfs_client_lock
);
1254 clp
= idr_find(&nn
->cb_ident_idr
, cb_ident
);
1256 atomic_inc(&clp
->cl_count
);
1257 spin_unlock(&nn
->nfs_client_lock
);
1261 #if defined(CONFIG_NFS_V4_1)
1263 * NFSv4.1 callback thread helper
1264 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1265 * minorversion, and sessionID
1267 * Returns NULL if no such client
1270 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
1271 struct nfs4_sessionid
*sid
)
1273 struct nfs_client
*clp
;
1274 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1276 spin_lock(&nn
->nfs_client_lock
);
1277 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
1278 if (nfs4_cb_match_client(addr
, clp
, 1) == false)
1281 if (!nfs4_has_session(clp
))
1284 /* Match sessionid*/
1285 if (memcmp(clp
->cl_session
->sess_id
.data
,
1286 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
1289 atomic_inc(&clp
->cl_count
);
1290 spin_unlock(&nn
->nfs_client_lock
);
1293 spin_unlock(&nn
->nfs_client_lock
);
1297 #else /* CONFIG_NFS_V4_1 */
1300 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
1301 struct nfs4_sessionid
*sid
)
1305 #endif /* CONFIG_NFS_V4_1 */
1308 * Set up an NFS4 client
1310 static int nfs4_set_client(struct nfs_server
*server
,
1311 const char *hostname
,
1312 const struct sockaddr
*addr
,
1313 const size_t addrlen
,
1314 const char *ip_addr
,
1315 rpc_authflavor_t authflavour
,
1316 int proto
, const struct rpc_timeout
*timeparms
,
1317 u32 minorversion
, struct net
*net
)
1319 struct nfs_client_initdata cl_init
= {
1320 .hostname
= hostname
,
1323 .rpc_ops
= &nfs_v4_clientops
,
1325 .minorversion
= minorversion
,
1328 struct nfs_client
*clp
;
1331 dprintk("--> nfs4_set_client()\n");
1333 if (server
->flags
& NFS_MOUNT_NORESVPORT
)
1334 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
1336 /* Allocate or find a client reference we can use */
1337 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
);
1339 error
= PTR_ERR(clp
);
1344 * Query for the lease time on clientid setup or renewal
1346 * Note that this will be set on nfs_clients that were created
1347 * only for the DS role and did not set this bit, but now will
1348 * serve a dual role.
1350 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
1352 server
->nfs_client
= clp
;
1353 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1356 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1361 * Set up a pNFS Data Server client.
1363 * Return any existing nfs_client that matches server address,port,version
1366 * For a new nfs_client, use a soft mount (default), a low retrans and a
1367 * low timeout interval so that if a connection is lost, we retry through
1370 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
1371 const struct sockaddr
*ds_addr
, int ds_addrlen
,
1372 int ds_proto
, unsigned int ds_timeo
, unsigned int ds_retrans
)
1374 struct nfs_client_initdata cl_init
= {
1376 .addrlen
= ds_addrlen
,
1377 .rpc_ops
= &nfs_v4_clientops
,
1379 .minorversion
= mds_clp
->cl_minorversion
,
1380 .net
= mds_clp
->cl_net
,
1382 struct rpc_timeout ds_timeout
;
1383 struct nfs_client
*clp
;
1386 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1387 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1388 * (section 13.1 RFC 5661).
1390 nfs_init_timeout_values(&ds_timeout
, ds_proto
, ds_timeo
, ds_retrans
);
1391 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
1392 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
);
1394 dprintk("<-- %s %p\n", __func__
, clp
);
1397 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
1400 * Session has been established, and the client marked ready.
1401 * Set the mount rsize and wsize with negotiated fore channel
1402 * attributes which will be bound checked in nfs_server_set_fsinfo.
1404 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1406 #ifdef CONFIG_NFS_V4_1
1407 struct nfs4_session
*sess
;
1411 if (!nfs4_has_session(server
->nfs_client
))
1413 sess
= server
->nfs_client
->cl_session
;
1414 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
1415 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
1417 if (server
->rsize
> server_resp_sz
)
1418 server
->rsize
= server_resp_sz
;
1419 if (server
->wsize
> server_rqst_sz
)
1420 server
->wsize
= server_rqst_sz
;
1421 #endif /* CONFIG_NFS_V4_1 */
1424 static int nfs4_server_common_setup(struct nfs_server
*server
,
1425 struct nfs_fh
*mntfh
)
1427 struct nfs_fattr
*fattr
;
1430 BUG_ON(!server
->nfs_client
);
1431 BUG_ON(!server
->nfs_client
->rpc_ops
);
1432 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1434 /* data servers support only a subset of NFSv4.1 */
1435 if (is_ds_only_client(server
->nfs_client
))
1436 return -EPROTONOSUPPORT
;
1438 fattr
= nfs_alloc_fattr();
1442 /* We must ensure the session is initialised first */
1443 error
= nfs4_init_session(server
);
1447 /* Probe the root fh to retrieve its FSID and filehandle */
1448 error
= nfs4_get_rootfh(server
, mntfh
);
1452 dprintk("Server FSID: %llx:%llx\n",
1453 (unsigned long long) server
->fsid
.major
,
1454 (unsigned long long) server
->fsid
.minor
);
1455 dprintk("Mount FH: %d\n", mntfh
->size
);
1457 nfs4_session_set_rwsize(server
);
1459 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1463 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1464 server
->namelen
= NFS4_MAXNAMLEN
;
1466 nfs_server_insert_lists(server
);
1467 server
->mount_time
= jiffies
;
1468 server
->destroy
= nfs4_destroy_server
;
1470 nfs_free_fattr(fattr
);
1475 * Create a version 4 volume record
1477 static int nfs4_init_server(struct nfs_server
*server
,
1478 const struct nfs_parsed_mount_data
*data
)
1480 struct rpc_timeout timeparms
;
1483 dprintk("--> nfs4_init_server()\n");
1485 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1486 data
->timeo
, data
->retrans
);
1488 /* Initialise the client representation from the mount data */
1489 server
->flags
= data
->flags
;
1490 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
|NFS_CAP_POSIX_LOCK
;
1491 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1492 server
->caps
|= NFS_CAP_READDIRPLUS
;
1493 server
->options
= data
->options
;
1495 /* Get a client record */
1496 error
= nfs4_set_client(server
,
1497 data
->nfs_server
.hostname
,
1498 (const struct sockaddr
*)&data
->nfs_server
.address
,
1499 data
->nfs_server
.addrlen
,
1500 data
->client_address
,
1501 data
->auth_flavors
[0],
1502 data
->nfs_server
.protocol
,
1510 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1513 if (nfs4_disable_idmapping
&& data
->auth_flavors
[0] == RPC_AUTH_UNIX
)
1514 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
1517 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1519 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1521 server
->acregmin
= data
->acregmin
* HZ
;
1522 server
->acregmax
= data
->acregmax
* HZ
;
1523 server
->acdirmin
= data
->acdirmin
* HZ
;
1524 server
->acdirmax
= data
->acdirmax
* HZ
;
1526 server
->port
= data
->nfs_server
.port
;
1528 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1532 dprintk("<-- nfs4_init_server() = %d\n", error
);
1537 * Create a version 4 volume record
1538 * - keyed on server and FSID
1540 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1541 struct nfs_fh
*mntfh
)
1543 struct nfs_server
*server
;
1546 dprintk("--> nfs4_create_server()\n");
1548 server
= nfs_alloc_server();
1550 return ERR_PTR(-ENOMEM
);
1552 /* set up the general RPC client */
1553 error
= nfs4_init_server(server
, data
);
1557 error
= nfs4_server_common_setup(server
, mntfh
);
1561 dprintk("<-- nfs4_create_server() = %p\n", server
);
1565 nfs_free_server(server
);
1566 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1567 return ERR_PTR(error
);
1571 * Create an NFS4 referral server record
1573 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1574 struct nfs_fh
*mntfh
)
1576 struct nfs_client
*parent_client
;
1577 struct nfs_server
*server
, *parent_server
;
1580 dprintk("--> nfs4_create_referral_server()\n");
1582 server
= nfs_alloc_server();
1584 return ERR_PTR(-ENOMEM
);
1586 parent_server
= NFS_SB(data
->sb
);
1587 parent_client
= parent_server
->nfs_client
;
1589 /* Initialise the client representation from the parent server */
1590 nfs_server_copy_userdata(server
, parent_server
);
1591 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1593 /* Get a client representation.
1594 * Note: NFSv4 always uses TCP, */
1595 error
= nfs4_set_client(server
, data
->hostname
,
1598 parent_client
->cl_ipaddr
,
1600 rpc_protocol(parent_server
->client
),
1601 parent_server
->client
->cl_timeout
,
1602 parent_client
->cl_mvops
->minor_version
,
1603 parent_client
->cl_net
);
1607 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1611 error
= nfs4_server_common_setup(server
, mntfh
);
1615 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1619 nfs_free_server(server
);
1620 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1621 return ERR_PTR(error
);
1624 #endif /* CONFIG_NFS_V4 */
1627 * Clone an NFS2, NFS3 or NFS4 server record
1629 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1631 struct nfs_fattr
*fattr
,
1632 rpc_authflavor_t flavor
)
1634 struct nfs_server
*server
;
1635 struct nfs_fattr
*fattr_fsinfo
;
1638 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1639 (unsigned long long) fattr
->fsid
.major
,
1640 (unsigned long long) fattr
->fsid
.minor
);
1642 server
= nfs_alloc_server();
1644 return ERR_PTR(-ENOMEM
);
1647 fattr_fsinfo
= nfs_alloc_fattr();
1648 if (fattr_fsinfo
== NULL
)
1649 goto out_free_server
;
1651 /* Copy data from the source */
1652 server
->nfs_client
= source
->nfs_client
;
1653 server
->destroy
= source
->destroy
;
1654 atomic_inc(&server
->nfs_client
->cl_count
);
1655 nfs_server_copy_userdata(server
, source
);
1657 server
->fsid
= fattr
->fsid
;
1659 error
= nfs_init_server_rpcclient(server
,
1660 source
->client
->cl_timeout
,
1663 goto out_free_server
;
1664 if (!IS_ERR(source
->client_acl
))
1665 nfs_init_server_aclclient(server
);
1667 /* probe the filesystem info for this server filesystem */
1668 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1670 goto out_free_server
;
1672 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1673 server
->namelen
= NFS4_MAXNAMLEN
;
1675 dprintk("Cloned FSID: %llx:%llx\n",
1676 (unsigned long long) server
->fsid
.major
,
1677 (unsigned long long) server
->fsid
.minor
);
1679 error
= nfs_start_lockd(server
);
1681 goto out_free_server
;
1683 nfs_server_insert_lists(server
);
1684 server
->mount_time
= jiffies
;
1686 nfs_free_fattr(fattr_fsinfo
);
1687 dprintk("<-- nfs_clone_server() = %p\n", server
);
1691 nfs_free_fattr(fattr_fsinfo
);
1692 nfs_free_server(server
);
1693 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1694 return ERR_PTR(error
);
1697 void nfs_clients_init(struct net
*net
)
1699 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1701 INIT_LIST_HEAD(&nn
->nfs_client_list
);
1702 INIT_LIST_HEAD(&nn
->nfs_volume_list
);
1703 #ifdef CONFIG_NFS_V4
1704 idr_init(&nn
->cb_ident_idr
);
1706 spin_lock_init(&nn
->nfs_client_lock
);
1707 nn
->boot_time
= CURRENT_TIME
;
1710 #ifdef CONFIG_PROC_FS
1711 static struct proc_dir_entry
*proc_fs_nfs
;
1713 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1714 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1715 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1716 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1717 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1719 static const struct seq_operations nfs_server_list_ops
= {
1720 .start
= nfs_server_list_start
,
1721 .next
= nfs_server_list_next
,
1722 .stop
= nfs_server_list_stop
,
1723 .show
= nfs_server_list_show
,
1726 static const struct file_operations nfs_server_list_fops
= {
1727 .open
= nfs_server_list_open
,
1729 .llseek
= seq_lseek
,
1730 .release
= seq_release
,
1731 .owner
= THIS_MODULE
,
1734 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1735 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1736 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1737 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1738 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1740 static const struct seq_operations nfs_volume_list_ops
= {
1741 .start
= nfs_volume_list_start
,
1742 .next
= nfs_volume_list_next
,
1743 .stop
= nfs_volume_list_stop
,
1744 .show
= nfs_volume_list_show
,
1747 static const struct file_operations nfs_volume_list_fops
= {
1748 .open
= nfs_volume_list_open
,
1750 .llseek
= seq_lseek
,
1751 .release
= seq_release
,
1752 .owner
= THIS_MODULE
,
1756 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1759 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1763 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1764 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1766 ret
= seq_open(file
, &nfs_server_list_ops
);
1770 m
= file
->private_data
;
1777 * set up the iterator to start reading from the server list and return the first item
1779 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1781 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1783 /* lock the list against modification */
1784 spin_lock(&nn
->nfs_client_lock
);
1785 return seq_list_start_head(&nn
->nfs_client_list
, *_pos
);
1789 * move to next server
1791 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1793 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1795 return seq_list_next(v
, &nn
->nfs_client_list
, pos
);
1799 * clean up after reading from the transports list
1801 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1803 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1805 spin_unlock(&nn
->nfs_client_lock
);
1809 * display a header line followed by a load of call lines
1811 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1813 struct nfs_client
*clp
;
1814 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1816 /* display header on line 1 */
1817 if (v
== &nn
->nfs_client_list
) {
1818 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1822 /* display one transport per line on subsequent lines */
1823 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1825 /* Check if the client is initialized */
1826 if (clp
->cl_cons_state
!= NFS_CS_READY
)
1830 seq_printf(m
, "v%u %s %s %3d %s\n",
1831 clp
->rpc_ops
->version
,
1832 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1833 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1834 atomic_read(&clp
->cl_count
),
1842 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1844 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1848 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1849 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1851 ret
= seq_open(file
, &nfs_volume_list_ops
);
1855 m
= file
->private_data
;
1862 * set up the iterator to start reading from the volume list and return the first item
1864 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1866 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1868 /* lock the list against modification */
1869 spin_lock(&nn
->nfs_client_lock
);
1870 return seq_list_start_head(&nn
->nfs_volume_list
, *_pos
);
1874 * move to next volume
1876 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1878 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1880 return seq_list_next(v
, &nn
->nfs_volume_list
, pos
);
1884 * clean up after reading from the transports list
1886 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1888 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1890 spin_unlock(&nn
->nfs_client_lock
);
1894 * display a header line followed by a load of call lines
1896 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1898 struct nfs_server
*server
;
1899 struct nfs_client
*clp
;
1900 char dev
[8], fsid
[17];
1901 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1903 /* display header on line 1 */
1904 if (v
== &nn
->nfs_volume_list
) {
1905 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1908 /* display one transport per line on subsequent lines */
1909 server
= list_entry(v
, struct nfs_server
, master_link
);
1910 clp
= server
->nfs_client
;
1912 snprintf(dev
, 8, "%u:%u",
1913 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1915 snprintf(fsid
, 17, "%llx:%llx",
1916 (unsigned long long) server
->fsid
.major
,
1917 (unsigned long long) server
->fsid
.minor
);
1920 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1921 clp
->rpc_ops
->version
,
1922 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1923 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1926 nfs_server_fscache_state(server
));
1933 * initialise the /proc/fs/nfsfs/ directory
1935 int __init
nfs_fs_proc_init(void)
1937 struct proc_dir_entry
*p
;
1939 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1943 /* a file of servers with which we're dealing */
1944 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1945 proc_fs_nfs
, &nfs_server_list_fops
);
1949 /* a file of volumes that we have mounted */
1950 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1951 proc_fs_nfs
, &nfs_volume_list_fops
);
1957 remove_proc_entry("servers", proc_fs_nfs
);
1959 remove_proc_entry("fs/nfsfs", NULL
);
1965 * clean up the /proc/fs/nfsfs/ directory
1967 void nfs_fs_proc_exit(void)
1969 remove_proc_entry("volumes", proc_fs_nfs
);
1970 remove_proc_entry("servers", proc_fs_nfs
);
1971 remove_proc_entry("fs/nfsfs", NULL
);
1974 #endif /* CONFIG_PROC_FS */
1976 module_param(nfs4_disable_idmapping
, bool, 0644);
1977 MODULE_PARM_DESC(nfs4_disable_idmapping
,
1978 "Turn off NFSv4 idmapping when using 'sec=sys'");