1 /* client.c: NFS client sharing and management code
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include <linux/time.h>
17 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/stat.h>
21 #include <linux/errno.h>
22 #include <linux/unistd.h>
23 #include <linux/sunrpc/clnt.h>
24 #include <linux/sunrpc/stats.h>
25 #include <linux/sunrpc/metrics.h>
26 #include <linux/sunrpc/xprtsock.h>
27 #include <linux/sunrpc/xprtrdma.h>
28 #include <linux/nfs_fs.h>
29 #include <linux/nfs_mount.h>
30 #include <linux/nfs4_mount.h>
31 #include <linux/lockd/bind.h>
32 #include <linux/seq_file.h>
33 #include <linux/mount.h>
34 #include <linux/nfs_idmap.h>
35 #include <linux/vfs.h>
36 #include <linux/inet.h>
37 #include <linux/in6.h>
38 #include <linux/slab.h>
40 #include <linux/nfs_xdr.h>
41 #include <linux/sunrpc/bc_xprt.h>
42 #include <linux/nsproxy.h>
43 #include <linux/pid_namespace.h>
45 #include <asm/system.h>
49 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_CLIENT
58 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
->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] = {
102 const struct rpc_program nfs_program
= {
104 .number
= NFS_PROGRAM
,
105 .nrvers
= ARRAY_SIZE(nfs_version
),
106 .version
= nfs_version
,
107 .stats
= &nfs_rpcstat
,
108 .pipe_dir_name
= NFS_PIPE_DIRNAME
,
111 struct rpc_stat nfs_rpcstat
= {
112 .program
= &nfs_program
116 #ifdef CONFIG_NFS_V3_ACL
117 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
118 static const struct rpc_version
*nfsacl_version
[] = {
119 [3] = &nfsacl_version3
,
122 const struct rpc_program nfsacl_program
= {
124 .number
= NFS_ACL_PROGRAM
,
125 .nrvers
= ARRAY_SIZE(nfsacl_version
),
126 .version
= nfsacl_version
,
127 .stats
= &nfsacl_rpcstat
,
129 #endif /* CONFIG_NFS_V3_ACL */
131 struct nfs_client_initdata
{
132 const char *hostname
;
133 const struct sockaddr
*addr
;
135 const struct nfs_rpc_ops
*rpc_ops
;
142 * Allocate a shared client record
144 * Since these are allocated/deallocated very rarely, we don't
145 * bother putting them in a slab cache...
147 static struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
149 struct nfs_client
*clp
;
150 struct rpc_cred
*cred
;
153 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
156 clp
->rpc_ops
= cl_init
->rpc_ops
;
158 atomic_set(&clp
->cl_count
, 1);
159 clp
->cl_cons_state
= NFS_CS_INITING
;
161 memcpy(&clp
->cl_addr
, cl_init
->addr
, cl_init
->addrlen
);
162 clp
->cl_addrlen
= cl_init
->addrlen
;
164 if (cl_init
->hostname
) {
166 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
167 if (!clp
->cl_hostname
)
171 INIT_LIST_HEAD(&clp
->cl_superblocks
);
172 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
174 clp
->cl_proto
= cl_init
->proto
;
175 clp
->net
= get_net(cl_init
->net
);
178 err
= nfs_get_cb_ident_idr(clp
, cl_init
->minorversion
);
182 spin_lock_init(&clp
->cl_lock
);
183 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
184 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
185 clp
->cl_boot_time
= CURRENT_TIME
;
186 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
187 clp
->cl_minorversion
= cl_init
->minorversion
;
188 clp
->cl_mvops
= nfs_v4_minor_ops
[cl_init
->minorversion
];
190 cred
= rpc_lookup_machine_cred("*");
192 clp
->cl_machine_cred
= cred
;
193 nfs_fscache_get_client_cookie(clp
);
204 #ifdef CONFIG_NFS_V4_1
205 static void nfs4_shutdown_session(struct nfs_client
*clp
)
207 if (nfs4_has_session(clp
)) {
208 nfs4_deviceid_purge_client(clp
);
209 nfs4_destroy_session(clp
->cl_session
);
213 #else /* CONFIG_NFS_V4_1 */
214 static void nfs4_shutdown_session(struct nfs_client
*clp
)
217 #endif /* CONFIG_NFS_V4_1 */
220 * Destroy the NFS4 callback service
222 static void nfs4_destroy_callback(struct nfs_client
*clp
)
224 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
225 nfs_callback_down(clp
->cl_mvops
->minor_version
);
228 static void nfs4_shutdown_client(struct nfs_client
*clp
)
230 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
231 nfs4_kill_renewd(clp
);
232 nfs4_shutdown_session(clp
);
233 nfs4_destroy_callback(clp
);
234 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
235 nfs_idmap_delete(clp
);
237 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
240 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
241 void nfs_cleanup_cb_ident_idr(struct net
*net
)
243 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
245 idr_destroy(&nn
->cb_ident_idr
);
248 /* nfs_client_lock held */
249 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
251 struct nfs_net
*nn
= net_generic(clp
->net
, nfs_net_id
);
253 if (clp
->cl_cb_ident
)
254 idr_remove(&nn
->cb_ident_idr
, clp
->cl_cb_ident
);
257 static void pnfs_init_server(struct nfs_server
*server
)
259 rpc_init_wait_queue(&server
->roc_rpcwaitq
, "pNFS ROC");
262 static void nfs4_destroy_server(struct nfs_server
*server
)
264 nfs4_purge_state_owners(server
);
268 static void nfs4_shutdown_client(struct nfs_client
*clp
)
272 void nfs_cleanup_cb_ident_idr(struct net
*net
)
276 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
280 static void pnfs_init_server(struct nfs_server
*server
)
284 #endif /* CONFIG_NFS_V4 */
287 * Destroy a shared client record
289 static void nfs_free_client(struct nfs_client
*clp
)
291 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
293 nfs4_shutdown_client(clp
);
295 nfs_fscache_release_client_cookie(clp
);
297 /* -EIO all pending I/O */
298 if (!IS_ERR(clp
->cl_rpcclient
))
299 rpc_shutdown_client(clp
->cl_rpcclient
);
301 if (clp
->cl_machine_cred
!= NULL
)
302 put_rpccred(clp
->cl_machine_cred
);
305 kfree(clp
->cl_hostname
);
306 kfree(clp
->server_scope
);
310 dprintk("<-- nfs_free_client()\n");
314 * Release a reference to a shared client record
316 void nfs_put_client(struct nfs_client
*clp
)
323 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
324 nn
= net_generic(clp
->net
, nfs_net_id
);
326 if (atomic_dec_and_lock(&clp
->cl_count
, &nn
->nfs_client_lock
)) {
327 list_del(&clp
->cl_share_link
);
328 nfs_cb_idr_remove_locked(clp
);
329 spin_unlock(&nn
->nfs_client_lock
);
331 BUG_ON(!list_empty(&clp
->cl_superblocks
));
333 nfs_free_client(clp
);
336 EXPORT_SYMBOL_GPL(nfs_put_client
);
338 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
340 * Test if two ip6 socket addresses refer to the same socket by
341 * comparing relevant fields. The padding bytes specifically, are not
342 * compared. sin6_flowinfo is not compared because it only affects QoS
343 * and sin6_scope_id is only compared if the address is "link local"
344 * because "link local" addresses need only be unique to a specific
345 * link. Conversely, ordinary unicast addresses might have different
348 * The caller should ensure both socket addresses are AF_INET6.
350 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
351 const struct sockaddr
*sa2
)
353 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
354 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
356 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
358 else if (ipv6_addr_type(&sin1
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
359 return sin1
->sin6_scope_id
== sin2
->sin6_scope_id
;
363 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
364 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
365 const struct sockaddr
*sa2
)
372 * Test if two ip4 socket addresses refer to the same socket, by
373 * comparing relevant fields. The padding bytes specifically, are
376 * The caller should ensure both socket addresses are AF_INET.
378 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
379 const struct sockaddr
*sa2
)
381 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
382 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
384 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
387 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
388 const struct sockaddr
*sa2
)
390 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
391 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
393 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
394 (sin1
->sin6_port
== sin2
->sin6_port
);
397 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
398 const struct sockaddr
*sa2
)
400 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
401 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
403 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
404 (sin1
->sin_port
== sin2
->sin_port
);
408 * Test if two socket addresses represent the same actual socket,
409 * by comparing (only) relevant fields, excluding the port number.
411 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
412 const struct sockaddr
*sa2
)
414 if (sa1
->sa_family
!= sa2
->sa_family
)
417 switch (sa1
->sa_family
) {
419 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
421 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
427 * Test if two socket addresses represent the same actual socket,
428 * by comparing (only) relevant fields, including the port number.
430 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
431 const struct sockaddr
*sa2
)
433 if (sa1
->sa_family
!= sa2
->sa_family
)
436 switch (sa1
->sa_family
) {
438 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
440 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
445 /* Common match routine for v4.0 and v4.1 callback services */
446 static bool nfs4_cb_match_client(const struct sockaddr
*addr
,
447 struct nfs_client
*clp
, u32 minorversion
)
449 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
451 /* Don't match clients that failed to initialise */
452 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
453 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
456 /* Match the version and minorversion */
457 if (clp
->rpc_ops
->version
!= 4 ||
458 clp
->cl_minorversion
!= minorversion
)
461 /* Match only the IP address, not the port number */
462 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
469 * Find an nfs_client on the list that matches the initialisation data
472 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
474 struct nfs_client
*clp
;
475 const struct sockaddr
*sap
= data
->addr
;
476 struct nfs_net
*nn
= net_generic(data
->net
, nfs_net_id
);
478 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
479 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
480 /* Don't match clients that failed to initialise properly */
481 if (clp
->cl_cons_state
< 0)
484 /* Different NFS versions cannot share the same nfs_client */
485 if (clp
->rpc_ops
!= data
->rpc_ops
)
488 if (clp
->cl_proto
!= data
->proto
)
490 /* Match nfsv4 minorversion */
491 if (clp
->cl_minorversion
!= data
->minorversion
)
493 /* Match the full socket address */
494 if (!nfs_sockaddr_cmp(sap
, clap
))
497 atomic_inc(&clp
->cl_count
);
504 * Look up a client by IP address and protocol version
505 * - creates a new record if one doesn't yet exist
507 static struct nfs_client
*
508 nfs_get_client(const struct nfs_client_initdata
*cl_init
,
509 const struct rpc_timeout
*timeparms
,
511 rpc_authflavor_t authflavour
,
514 struct nfs_client
*clp
, *new = NULL
;
516 struct nfs_net
*nn
= net_generic(cl_init
->net
, nfs_net_id
);
518 dprintk("--> nfs_get_client(%s,v%u)\n",
519 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
521 /* see if the client already exists */
523 spin_lock(&nn
->nfs_client_lock
);
525 clp
= nfs_match_client(cl_init
);
531 spin_unlock(&nn
->nfs_client_lock
);
533 new = nfs_alloc_client(cl_init
);
534 } while (!IS_ERR(new));
536 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
539 /* install a new client and return with it unready */
542 list_add(&clp
->cl_share_link
, &nn
->nfs_client_list
);
543 spin_unlock(&nn
->nfs_client_lock
);
545 error
= cl_init
->rpc_ops
->init_client(clp
, timeparms
, ip_addr
,
546 authflavour
, noresvport
);
549 return ERR_PTR(error
);
551 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
554 /* found an existing client
555 * - make sure it's ready before returning
558 spin_unlock(&nn
->nfs_client_lock
);
561 nfs_free_client(new);
563 error
= wait_event_killable(nfs_client_active_wq
,
564 clp
->cl_cons_state
< NFS_CS_INITING
);
567 return ERR_PTR(-ERESTARTSYS
);
570 if (clp
->cl_cons_state
< NFS_CS_READY
) {
571 error
= clp
->cl_cons_state
;
573 return ERR_PTR(error
);
576 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
578 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
583 * Mark a server as ready or failed
585 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
587 clp
->cl_cons_state
= state
;
588 wake_up_all(&nfs_client_active_wq
);
592 * With sessions, the client is not marked ready until after a
593 * successful EXCHANGE_ID and CREATE_SESSION.
595 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
596 * other versions of NFS can be tried.
598 int nfs4_check_client_ready(struct nfs_client
*clp
)
600 if (!nfs4_has_session(clp
))
602 if (clp
->cl_cons_state
< NFS_CS_READY
)
603 return -EPROTONOSUPPORT
;
608 * Initialise the timeout values for a connection
610 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
611 unsigned int timeo
, unsigned int retrans
)
613 to
->to_initval
= timeo
* HZ
/ 10;
614 to
->to_retries
= retrans
;
617 case XPRT_TRANSPORT_TCP
:
618 case XPRT_TRANSPORT_RDMA
:
619 if (to
->to_retries
== 0)
620 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
621 if (to
->to_initval
== 0)
622 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
623 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
624 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
625 to
->to_increment
= to
->to_initval
;
626 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
627 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
628 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
629 if (to
->to_maxval
< to
->to_initval
)
630 to
->to_maxval
= to
->to_initval
;
631 to
->to_exponential
= 0;
633 case XPRT_TRANSPORT_UDP
:
634 if (to
->to_retries
== 0)
635 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
637 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
638 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
639 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
640 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
641 to
->to_exponential
= 1;
649 * Create an RPC client handle
651 static int nfs_create_rpc_client(struct nfs_client
*clp
,
652 const struct rpc_timeout
*timeparms
,
653 rpc_authflavor_t flavor
,
654 int discrtry
, int noresvport
)
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
,
670 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
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 * Initialise an NFS2 or NFS3 client
807 int nfs_init_client(struct nfs_client
*clp
, const struct rpc_timeout
*timeparms
,
808 const char *ip_addr
, rpc_authflavor_t authflavour
,
813 if (clp
->cl_cons_state
== NFS_CS_READY
) {
814 /* the client is already initialised */
815 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
820 * Create a client RPC handle for doing FSSTAT with UNIX auth only
821 * - RFC 2623, sec 2.3.2
823 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
,
827 nfs_mark_client_ready(clp
, NFS_CS_READY
);
831 nfs_mark_client_ready(clp
, error
);
832 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
837 * Create a version 2 or 3 client
839 static int nfs_init_server(struct nfs_server
*server
,
840 const struct nfs_parsed_mount_data
*data
)
842 struct nfs_client_initdata cl_init
= {
843 .hostname
= data
->nfs_server
.hostname
,
844 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
845 .addrlen
= data
->nfs_server
.addrlen
,
846 .rpc_ops
= &nfs_v2_clientops
,
847 .proto
= data
->nfs_server
.protocol
,
850 struct rpc_timeout timeparms
;
851 struct nfs_client
*clp
;
854 dprintk("--> nfs_init_server()\n");
857 if (data
->version
== 3)
858 cl_init
.rpc_ops
= &nfs_v3_clientops
;
861 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
862 data
->timeo
, data
->retrans
);
864 /* Allocate or find a client reference we can use */
865 clp
= nfs_get_client(&cl_init
, &timeparms
, NULL
, RPC_AUTH_UNIX
,
866 data
->flags
& NFS_MOUNT_NORESVPORT
);
868 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
872 server
->nfs_client
= clp
;
874 /* Initialise the client representation from the mount data */
875 server
->flags
= data
->flags
;
876 server
->options
= data
->options
;
877 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
878 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
879 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
;
882 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
884 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
886 server
->acregmin
= data
->acregmin
* HZ
;
887 server
->acregmax
= data
->acregmax
* HZ
;
888 server
->acdirmin
= data
->acdirmin
* HZ
;
889 server
->acdirmax
= data
->acdirmax
* HZ
;
891 /* Start lockd here, before we might error out */
892 error
= nfs_start_lockd(server
);
896 server
->port
= data
->nfs_server
.port
;
898 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
902 /* Preserve the values of mount_server-related mount options */
903 if (data
->mount_server
.addrlen
) {
904 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
905 data
->mount_server
.addrlen
);
906 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
908 server
->mountd_version
= data
->mount_server
.version
;
909 server
->mountd_port
= data
->mount_server
.port
;
910 server
->mountd_protocol
= data
->mount_server
.protocol
;
912 server
->namelen
= data
->namlen
;
913 /* Create a client RPC handle for the NFSv3 ACL management interface */
914 nfs_init_server_aclclient(server
);
915 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
919 server
->nfs_client
= NULL
;
921 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
926 * Load up the server record from information gained in an fsinfo record
928 static void nfs_server_set_fsinfo(struct nfs_server
*server
,
929 struct nfs_fh
*mntfh
,
930 struct nfs_fsinfo
*fsinfo
)
932 unsigned long max_rpc_payload
;
934 /* Work out a lot of parameters */
935 if (server
->rsize
== 0)
936 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
937 if (server
->wsize
== 0)
938 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
940 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
941 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
942 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
943 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
945 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
946 if (server
->rsize
> max_rpc_payload
)
947 server
->rsize
= max_rpc_payload
;
948 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
949 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
950 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
952 server
->backing_dev_info
.name
= "nfs";
953 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
955 if (server
->wsize
> max_rpc_payload
)
956 server
->wsize
= max_rpc_payload
;
957 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
958 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
959 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
960 server
->pnfs_blksize
= fsinfo
->blksize
;
961 set_pnfs_layoutdriver(server
, mntfh
, fsinfo
->layouttype
);
963 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
965 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
966 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
967 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
968 if (server
->dtsize
> server
->rsize
)
969 server
->dtsize
= server
->rsize
;
971 if (server
->flags
& NFS_MOUNT_NOAC
) {
972 server
->acregmin
= server
->acregmax
= 0;
973 server
->acdirmin
= server
->acdirmax
= 0;
976 server
->maxfilesize
= fsinfo
->maxfilesize
;
978 server
->time_delta
= fsinfo
->time_delta
;
980 /* We're airborne Set socket buffersize */
981 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
985 * Probe filesystem information, including the FSID on v2/v3
987 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
989 struct nfs_fsinfo fsinfo
;
990 struct nfs_client
*clp
= server
->nfs_client
;
993 dprintk("--> nfs_probe_fsinfo()\n");
995 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
996 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
1001 fsinfo
.fattr
= fattr
;
1002 fsinfo
.layouttype
= 0;
1003 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
1007 nfs_server_set_fsinfo(server
, mntfh
, &fsinfo
);
1009 /* Get some general file system info */
1010 if (server
->namelen
== 0) {
1011 struct nfs_pathconf pathinfo
;
1013 pathinfo
.fattr
= fattr
;
1014 nfs_fattr_init(fattr
);
1016 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
1017 server
->namelen
= pathinfo
.max_namelen
;
1020 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1024 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
1029 * Copy useful information when duplicating a server record
1031 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
1033 target
->flags
= source
->flags
;
1034 target
->rsize
= source
->rsize
;
1035 target
->wsize
= source
->wsize
;
1036 target
->acregmin
= source
->acregmin
;
1037 target
->acregmax
= source
->acregmax
;
1038 target
->acdirmin
= source
->acdirmin
;
1039 target
->acdirmax
= source
->acdirmax
;
1040 target
->caps
= source
->caps
;
1041 target
->options
= source
->options
;
1044 static void nfs_server_insert_lists(struct nfs_server
*server
)
1046 struct nfs_client
*clp
= server
->nfs_client
;
1047 struct nfs_net
*nn
= net_generic(clp
->net
, nfs_net_id
);
1049 spin_lock(&nn
->nfs_client_lock
);
1050 list_add_tail_rcu(&server
->client_link
, &clp
->cl_superblocks
);
1051 list_add_tail(&server
->master_link
, &nn
->nfs_volume_list
);
1052 clear_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1053 spin_unlock(&nn
->nfs_client_lock
);
1057 static void nfs_server_remove_lists(struct nfs_server
*server
)
1059 struct nfs_client
*clp
= server
->nfs_client
;
1064 nn
= net_generic(clp
->net
, nfs_net_id
);
1065 spin_lock(&nn
->nfs_client_lock
);
1066 list_del_rcu(&server
->client_link
);
1067 if (list_empty(&clp
->cl_superblocks
))
1068 set_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1069 list_del(&server
->master_link
);
1070 spin_unlock(&nn
->nfs_client_lock
);
1076 * Allocate and initialise a server record
1078 static struct nfs_server
*nfs_alloc_server(void)
1080 struct nfs_server
*server
;
1082 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1086 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
1088 /* Zero out the NFS state stuff */
1089 INIT_LIST_HEAD(&server
->client_link
);
1090 INIT_LIST_HEAD(&server
->master_link
);
1091 INIT_LIST_HEAD(&server
->delegations
);
1092 INIT_LIST_HEAD(&server
->layouts
);
1093 INIT_LIST_HEAD(&server
->state_owners_lru
);
1095 atomic_set(&server
->active
, 0);
1097 server
->io_stats
= nfs_alloc_iostats();
1098 if (!server
->io_stats
) {
1103 if (bdi_init(&server
->backing_dev_info
)) {
1104 nfs_free_iostats(server
->io_stats
);
1109 ida_init(&server
->openowner_id
);
1110 ida_init(&server
->lockowner_id
);
1111 pnfs_init_server(server
);
1117 * Free up a server record
1119 void nfs_free_server(struct nfs_server
*server
)
1121 dprintk("--> nfs_free_server()\n");
1123 nfs_server_remove_lists(server
);
1124 unset_pnfs_layoutdriver(server
);
1126 if (server
->destroy
!= NULL
)
1127 server
->destroy(server
);
1129 if (!IS_ERR(server
->client_acl
))
1130 rpc_shutdown_client(server
->client_acl
);
1131 if (!IS_ERR(server
->client
))
1132 rpc_shutdown_client(server
->client
);
1134 nfs_put_client(server
->nfs_client
);
1136 ida_destroy(&server
->lockowner_id
);
1137 ida_destroy(&server
->openowner_id
);
1138 nfs_free_iostats(server
->io_stats
);
1139 bdi_destroy(&server
->backing_dev_info
);
1141 nfs_release_automount_timer();
1142 dprintk("<-- nfs_free_server()\n");
1146 * Create a version 2 or 3 volume record
1147 * - keyed on server and FSID
1149 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1150 struct nfs_fh
*mntfh
)
1152 struct nfs_server
*server
;
1153 struct nfs_fattr
*fattr
;
1156 server
= nfs_alloc_server();
1158 return ERR_PTR(-ENOMEM
);
1161 fattr
= nfs_alloc_fattr();
1165 /* Get a client representation */
1166 error
= nfs_init_server(server
, data
);
1170 BUG_ON(!server
->nfs_client
);
1171 BUG_ON(!server
->nfs_client
->rpc_ops
);
1172 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1174 /* Probe the root fh to retrieve its FSID */
1175 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1178 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1179 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1180 server
->namelen
= NFS3_MAXNAMLEN
;
1181 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1182 server
->caps
|= NFS_CAP_READDIRPLUS
;
1184 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1185 server
->namelen
= NFS2_MAXNAMLEN
;
1188 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1189 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, fattr
);
1191 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1195 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1197 dprintk("Server FSID: %llx:%llx\n",
1198 (unsigned long long) server
->fsid
.major
,
1199 (unsigned long long) server
->fsid
.minor
);
1201 nfs_server_insert_lists(server
);
1202 server
->mount_time
= jiffies
;
1203 nfs_free_fattr(fattr
);
1207 nfs_free_fattr(fattr
);
1208 nfs_free_server(server
);
1209 return ERR_PTR(error
);
1212 #ifdef CONFIG_NFS_V4
1214 * NFSv4.0 callback thread helper
1216 * Find a client by callback identifier
1219 nfs4_find_client_ident(struct net
*net
, int cb_ident
)
1221 struct nfs_client
*clp
;
1222 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1224 spin_lock(&nn
->nfs_client_lock
);
1225 clp
= idr_find(&nn
->cb_ident_idr
, cb_ident
);
1227 atomic_inc(&clp
->cl_count
);
1228 spin_unlock(&nn
->nfs_client_lock
);
1232 #if defined(CONFIG_NFS_V4_1)
1234 * NFSv4.1 callback thread helper
1235 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1236 * minorversion, and sessionID
1238 * Returns NULL if no such client
1241 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
1242 struct nfs4_sessionid
*sid
)
1244 struct nfs_client
*clp
;
1245 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1247 spin_lock(&nn
->nfs_client_lock
);
1248 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
1249 if (nfs4_cb_match_client(addr
, clp
, 1) == false)
1252 if (!nfs4_has_session(clp
))
1255 /* Match sessionid*/
1256 if (memcmp(clp
->cl_session
->sess_id
.data
,
1257 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
1260 atomic_inc(&clp
->cl_count
);
1261 spin_unlock(&nn
->nfs_client_lock
);
1264 spin_unlock(&nn
->nfs_client_lock
);
1268 #else /* CONFIG_NFS_V4_1 */
1271 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
1272 struct nfs4_sessionid
*sid
)
1276 #endif /* CONFIG_NFS_V4_1 */
1279 * Initialize the NFS4 callback service
1281 static int nfs4_init_callback(struct nfs_client
*clp
)
1285 if (clp
->rpc_ops
->version
== 4) {
1286 struct rpc_xprt
*xprt
;
1288 xprt
= rcu_dereference_raw(clp
->cl_rpcclient
->cl_xprt
);
1290 if (nfs4_has_session(clp
)) {
1291 error
= xprt_setup_backchannel(xprt
,
1292 NFS41_BC_MIN_CALLBACKS
);
1297 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
, xprt
);
1299 dprintk("%s: failed to start callback. Error = %d\n",
1303 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
1309 * Initialize the minor version specific parts of an NFS4 client record
1311 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
1313 #if defined(CONFIG_NFS_V4_1)
1314 if (clp
->cl_mvops
->minor_version
) {
1315 struct nfs4_session
*session
= NULL
;
1317 * Create the session and mark it expired.
1318 * When a SEQUENCE operation encounters the expired session
1319 * it will do session recovery to initialize it.
1321 session
= nfs4_alloc_session(clp
);
1325 clp
->cl_session
= session
;
1327 * The create session reply races with the server back
1328 * channel probe. Mark the client NFS_CS_SESSION_INITING
1329 * so that the client back channel can find the
1332 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
1334 #endif /* CONFIG_NFS_V4_1 */
1336 return nfs4_init_callback(clp
);
1340 * Initialise an NFS4 client record
1342 int nfs4_init_client(struct nfs_client
*clp
,
1343 const struct rpc_timeout
*timeparms
,
1344 const char *ip_addr
,
1345 rpc_authflavor_t authflavour
,
1348 char buf
[INET6_ADDRSTRLEN
+ 1];
1351 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1352 /* the client is initialised already */
1353 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1357 /* Check NFS protocol revision and initialize RPC op vector */
1358 clp
->rpc_ops
= &nfs_v4_clientops
;
1360 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
,
1365 /* If no clientaddr= option was specified, find a usable cb address */
1366 if (ip_addr
== NULL
) {
1367 struct sockaddr_storage cb_addr
;
1368 struct sockaddr
*sap
= (struct sockaddr
*)&cb_addr
;
1370 error
= rpc_localaddr(clp
->cl_rpcclient
, sap
, sizeof(cb_addr
));
1373 error
= rpc_ntop(sap
, buf
, sizeof(buf
));
1376 ip_addr
= (const char *)buf
;
1378 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1380 error
= nfs_idmap_new(clp
);
1382 dprintk("%s: failed to create idmapper. Error = %d\n",
1386 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1388 error
= nfs4_init_client_minor_version(clp
);
1392 if (!nfs4_has_session(clp
))
1393 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1397 nfs_mark_client_ready(clp
, error
);
1398 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1403 * Set up an NFS4 client
1405 static int nfs4_set_client(struct nfs_server
*server
,
1406 const char *hostname
,
1407 const struct sockaddr
*addr
,
1408 const size_t addrlen
,
1409 const char *ip_addr
,
1410 rpc_authflavor_t authflavour
,
1411 int proto
, const struct rpc_timeout
*timeparms
,
1412 u32 minorversion
, struct net
*net
)
1414 struct nfs_client_initdata cl_init
= {
1415 .hostname
= hostname
,
1418 .rpc_ops
= &nfs_v4_clientops
,
1420 .minorversion
= minorversion
,
1423 struct nfs_client
*clp
;
1426 dprintk("--> nfs4_set_client()\n");
1428 /* Allocate or find a client reference we can use */
1429 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
,
1430 server
->flags
& NFS_MOUNT_NORESVPORT
);
1432 error
= PTR_ERR(clp
);
1437 * Query for the lease time on clientid setup or renewal
1439 * Note that this will be set on nfs_clients that were created
1440 * only for the DS role and did not set this bit, but now will
1441 * serve a dual role.
1443 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
1445 server
->nfs_client
= clp
;
1446 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1449 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1454 * Set up a pNFS Data Server client.
1456 * Return any existing nfs_client that matches server address,port,version
1459 * For a new nfs_client, use a soft mount (default), a low retrans and a
1460 * low timeout interval so that if a connection is lost, we retry through
1463 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
1464 const struct sockaddr
*ds_addr
,
1465 int ds_addrlen
, int ds_proto
)
1467 struct nfs_client_initdata cl_init
= {
1469 .addrlen
= ds_addrlen
,
1470 .rpc_ops
= &nfs_v4_clientops
,
1472 .minorversion
= mds_clp
->cl_minorversion
,
1473 .net
= mds_clp
->net
,
1475 struct rpc_timeout ds_timeout
= {
1476 .to_initval
= 15 * HZ
,
1477 .to_maxval
= 15 * HZ
,
1479 .to_exponential
= 1,
1481 struct nfs_client
*clp
;
1484 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1485 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1486 * (section 13.1 RFC 5661).
1488 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
1489 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
, 0);
1491 dprintk("<-- %s %p\n", __func__
, clp
);
1494 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
1497 * Session has been established, and the client marked ready.
1498 * Set the mount rsize and wsize with negotiated fore channel
1499 * attributes which will be bound checked in nfs_server_set_fsinfo.
1501 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1503 #ifdef CONFIG_NFS_V4_1
1504 struct nfs4_session
*sess
;
1508 if (!nfs4_has_session(server
->nfs_client
))
1510 sess
= server
->nfs_client
->cl_session
;
1511 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
1512 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
1514 if (server
->rsize
> server_resp_sz
)
1515 server
->rsize
= server_resp_sz
;
1516 if (server
->wsize
> server_rqst_sz
)
1517 server
->wsize
= server_rqst_sz
;
1518 #endif /* CONFIG_NFS_V4_1 */
1521 static int nfs4_server_common_setup(struct nfs_server
*server
,
1522 struct nfs_fh
*mntfh
)
1524 struct nfs_fattr
*fattr
;
1527 BUG_ON(!server
->nfs_client
);
1528 BUG_ON(!server
->nfs_client
->rpc_ops
);
1529 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1531 /* data servers support only a subset of NFSv4.1 */
1532 if (is_ds_only_client(server
->nfs_client
))
1533 return -EPROTONOSUPPORT
;
1535 fattr
= nfs_alloc_fattr();
1539 /* We must ensure the session is initialised first */
1540 error
= nfs4_init_session(server
);
1544 /* Probe the root fh to retrieve its FSID and filehandle */
1545 error
= nfs4_get_rootfh(server
, mntfh
);
1549 dprintk("Server FSID: %llx:%llx\n",
1550 (unsigned long long) server
->fsid
.major
,
1551 (unsigned long long) server
->fsid
.minor
);
1552 dprintk("Mount FH: %d\n", mntfh
->size
);
1554 nfs4_session_set_rwsize(server
);
1556 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1560 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1561 server
->namelen
= NFS4_MAXNAMLEN
;
1563 nfs_server_insert_lists(server
);
1564 server
->mount_time
= jiffies
;
1565 server
->destroy
= nfs4_destroy_server
;
1567 nfs_free_fattr(fattr
);
1572 * Create a version 4 volume record
1574 static int nfs4_init_server(struct nfs_server
*server
,
1575 const struct nfs_parsed_mount_data
*data
)
1577 struct rpc_timeout timeparms
;
1580 dprintk("--> nfs4_init_server()\n");
1582 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1583 data
->timeo
, data
->retrans
);
1585 /* Initialise the client representation from the mount data */
1586 server
->flags
= data
->flags
;
1587 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
|NFS_CAP_POSIX_LOCK
;
1588 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1589 server
->caps
|= NFS_CAP_READDIRPLUS
;
1590 server
->options
= data
->options
;
1592 /* Get a client record */
1593 error
= nfs4_set_client(server
,
1594 data
->nfs_server
.hostname
,
1595 (const struct sockaddr
*)&data
->nfs_server
.address
,
1596 data
->nfs_server
.addrlen
,
1597 data
->client_address
,
1598 data
->auth_flavors
[0],
1599 data
->nfs_server
.protocol
,
1607 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1610 if (nfs4_disable_idmapping
&& data
->auth_flavors
[0] == RPC_AUTH_UNIX
)
1611 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
1614 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1616 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1618 server
->acregmin
= data
->acregmin
* HZ
;
1619 server
->acregmax
= data
->acregmax
* HZ
;
1620 server
->acdirmin
= data
->acdirmin
* HZ
;
1621 server
->acdirmax
= data
->acdirmax
* HZ
;
1623 server
->port
= data
->nfs_server
.port
;
1625 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1629 dprintk("<-- nfs4_init_server() = %d\n", error
);
1634 * Create a version 4 volume record
1635 * - keyed on server and FSID
1637 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1638 struct nfs_fh
*mntfh
)
1640 struct nfs_server
*server
;
1643 dprintk("--> nfs4_create_server()\n");
1645 server
= nfs_alloc_server();
1647 return ERR_PTR(-ENOMEM
);
1649 /* set up the general RPC client */
1650 error
= nfs4_init_server(server
, data
);
1654 error
= nfs4_server_common_setup(server
, mntfh
);
1658 dprintk("<-- nfs4_create_server() = %p\n", server
);
1662 nfs_free_server(server
);
1663 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1664 return ERR_PTR(error
);
1668 * Create an NFS4 referral server record
1670 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1671 struct nfs_fh
*mntfh
)
1673 struct nfs_client
*parent_client
;
1674 struct nfs_server
*server
, *parent_server
;
1677 dprintk("--> nfs4_create_referral_server()\n");
1679 server
= nfs_alloc_server();
1681 return ERR_PTR(-ENOMEM
);
1683 parent_server
= NFS_SB(data
->sb
);
1684 parent_client
= parent_server
->nfs_client
;
1686 /* Initialise the client representation from the parent server */
1687 nfs_server_copy_userdata(server
, parent_server
);
1688 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1690 /* Get a client representation.
1691 * Note: NFSv4 always uses TCP, */
1692 error
= nfs4_set_client(server
, data
->hostname
,
1695 parent_client
->cl_ipaddr
,
1697 rpc_protocol(parent_server
->client
),
1698 parent_server
->client
->cl_timeout
,
1699 parent_client
->cl_mvops
->minor_version
,
1700 parent_client
->net
);
1704 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1708 error
= nfs4_server_common_setup(server
, mntfh
);
1712 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1716 nfs_free_server(server
);
1717 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1718 return ERR_PTR(error
);
1721 #endif /* CONFIG_NFS_V4 */
1724 * Clone an NFS2, NFS3 or NFS4 server record
1726 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1728 struct nfs_fattr
*fattr
)
1730 struct nfs_server
*server
;
1731 struct nfs_fattr
*fattr_fsinfo
;
1734 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1735 (unsigned long long) fattr
->fsid
.major
,
1736 (unsigned long long) fattr
->fsid
.minor
);
1738 server
= nfs_alloc_server();
1740 return ERR_PTR(-ENOMEM
);
1743 fattr_fsinfo
= nfs_alloc_fattr();
1744 if (fattr_fsinfo
== NULL
)
1745 goto out_free_server
;
1747 /* Copy data from the source */
1748 server
->nfs_client
= source
->nfs_client
;
1749 server
->destroy
= source
->destroy
;
1750 atomic_inc(&server
->nfs_client
->cl_count
);
1751 nfs_server_copy_userdata(server
, source
);
1753 server
->fsid
= fattr
->fsid
;
1755 error
= nfs_init_server_rpcclient(server
,
1756 source
->client
->cl_timeout
,
1757 source
->client
->cl_auth
->au_flavor
);
1759 goto out_free_server
;
1760 if (!IS_ERR(source
->client_acl
))
1761 nfs_init_server_aclclient(server
);
1763 /* probe the filesystem info for this server filesystem */
1764 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1766 goto out_free_server
;
1768 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1769 server
->namelen
= NFS4_MAXNAMLEN
;
1771 dprintk("Cloned FSID: %llx:%llx\n",
1772 (unsigned long long) server
->fsid
.major
,
1773 (unsigned long long) server
->fsid
.minor
);
1775 error
= nfs_start_lockd(server
);
1777 goto out_free_server
;
1779 nfs_server_insert_lists(server
);
1780 server
->mount_time
= jiffies
;
1782 nfs_free_fattr(fattr_fsinfo
);
1783 dprintk("<-- nfs_clone_server() = %p\n", server
);
1787 nfs_free_fattr(fattr_fsinfo
);
1788 nfs_free_server(server
);
1789 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1790 return ERR_PTR(error
);
1793 void nfs_clients_init(struct net
*net
)
1795 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
1797 INIT_LIST_HEAD(&nn
->nfs_client_list
);
1798 INIT_LIST_HEAD(&nn
->nfs_volume_list
);
1799 #ifdef CONFIG_NFS_V4
1800 idr_init(&nn
->cb_ident_idr
);
1802 spin_lock_init(&nn
->nfs_client_lock
);
1805 #ifdef CONFIG_PROC_FS
1806 static struct proc_dir_entry
*proc_fs_nfs
;
1808 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1809 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1810 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1811 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1812 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1814 static const struct seq_operations nfs_server_list_ops
= {
1815 .start
= nfs_server_list_start
,
1816 .next
= nfs_server_list_next
,
1817 .stop
= nfs_server_list_stop
,
1818 .show
= nfs_server_list_show
,
1821 static const struct file_operations nfs_server_list_fops
= {
1822 .open
= nfs_server_list_open
,
1824 .llseek
= seq_lseek
,
1825 .release
= seq_release
,
1826 .owner
= THIS_MODULE
,
1829 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1830 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1831 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1832 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1833 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1835 static const struct seq_operations nfs_volume_list_ops
= {
1836 .start
= nfs_volume_list_start
,
1837 .next
= nfs_volume_list_next
,
1838 .stop
= nfs_volume_list_stop
,
1839 .show
= nfs_volume_list_show
,
1842 static const struct file_operations nfs_volume_list_fops
= {
1843 .open
= nfs_volume_list_open
,
1845 .llseek
= seq_lseek
,
1846 .release
= seq_release
,
1847 .owner
= THIS_MODULE
,
1851 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1854 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1858 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1859 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1861 ret
= seq_open(file
, &nfs_server_list_ops
);
1865 m
= file
->private_data
;
1872 * set up the iterator to start reading from the server list and return the first item
1874 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1876 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1878 /* lock the list against modification */
1879 spin_lock(&nn
->nfs_client_lock
);
1880 return seq_list_start_head(&nn
->nfs_client_list
, *_pos
);
1884 * move to next server
1886 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1888 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1890 return seq_list_next(v
, &nn
->nfs_client_list
, pos
);
1894 * clean up after reading from the transports list
1896 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1898 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1900 spin_unlock(&nn
->nfs_client_lock
);
1904 * display a header line followed by a load of call lines
1906 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1908 struct nfs_client
*clp
;
1909 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1911 /* display header on line 1 */
1912 if (v
== &nn
->nfs_client_list
) {
1913 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1917 /* display one transport per line on subsequent lines */
1918 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1920 /* Check if the client is initialized */
1921 if (clp
->cl_cons_state
!= NFS_CS_READY
)
1925 seq_printf(m
, "v%u %s %s %3d %s\n",
1926 clp
->rpc_ops
->version
,
1927 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1928 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1929 atomic_read(&clp
->cl_count
),
1937 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1939 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1943 struct pid_namespace
*pid_ns
= file
->f_dentry
->d_sb
->s_fs_info
;
1944 struct net
*net
= pid_ns
->child_reaper
->nsproxy
->net_ns
;
1946 ret
= seq_open(file
, &nfs_volume_list_ops
);
1950 m
= file
->private_data
;
1957 * set up the iterator to start reading from the volume list and return the first item
1959 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1961 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1963 /* lock the list against modification */
1964 spin_lock(&nn
->nfs_client_lock
);
1965 return seq_list_start_head(&nn
->nfs_volume_list
, *_pos
);
1969 * move to next volume
1971 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1973 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1975 return seq_list_next(v
, &nn
->nfs_volume_list
, pos
);
1979 * clean up after reading from the transports list
1981 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1983 struct nfs_net
*nn
= net_generic(p
->private, nfs_net_id
);
1985 spin_unlock(&nn
->nfs_client_lock
);
1989 * display a header line followed by a load of call lines
1991 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1993 struct nfs_server
*server
;
1994 struct nfs_client
*clp
;
1995 char dev
[8], fsid
[17];
1996 struct nfs_net
*nn
= net_generic(m
->private, nfs_net_id
);
1998 /* display header on line 1 */
1999 if (v
== &nn
->nfs_volume_list
) {
2000 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
2003 /* display one transport per line on subsequent lines */
2004 server
= list_entry(v
, struct nfs_server
, master_link
);
2005 clp
= server
->nfs_client
;
2007 snprintf(dev
, 8, "%u:%u",
2008 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
2010 snprintf(fsid
, 17, "%llx:%llx",
2011 (unsigned long long) server
->fsid
.major
,
2012 (unsigned long long) server
->fsid
.minor
);
2015 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
2016 clp
->rpc_ops
->version
,
2017 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
2018 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
2021 nfs_server_fscache_state(server
));
2028 * initialise the /proc/fs/nfsfs/ directory
2030 int __init
nfs_fs_proc_init(void)
2032 struct proc_dir_entry
*p
;
2034 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
2038 /* a file of servers with which we're dealing */
2039 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
2040 proc_fs_nfs
, &nfs_server_list_fops
);
2044 /* a file of volumes that we have mounted */
2045 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
2046 proc_fs_nfs
, &nfs_volume_list_fops
);
2052 remove_proc_entry("servers", proc_fs_nfs
);
2054 remove_proc_entry("fs/nfsfs", NULL
);
2060 * clean up the /proc/fs/nfsfs/ directory
2062 void nfs_fs_proc_exit(void)
2064 remove_proc_entry("volumes", proc_fs_nfs
);
2065 remove_proc_entry("servers", proc_fs_nfs
);
2066 remove_proc_entry("fs/nfsfs", NULL
);
2069 #endif /* CONFIG_PROC_FS */
2071 module_param(nfs4_disable_idmapping
, bool, 0644);
2072 MODULE_PARM_DESC(nfs4_disable_idmapping
,
2073 "Turn off NFSv4 idmapping when using 'sec=sys'");