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>
43 #include <asm/system.h>
47 #include "delegation.h"
53 #define NFSDBG_FACILITY NFSDBG_CLIENT
55 static DEFINE_SPINLOCK(nfs_client_lock
);
56 static LIST_HEAD(nfs_client_list
);
57 static LIST_HEAD(nfs_volume_list
);
58 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
60 static DEFINE_IDR(cb_ident_idr
); /* Protected by nfs_client_lock */
63 * Get a unique NFSv4.0 callback identifier which will be used
64 * by the V4.0 callback service to lookup the nfs_client struct
66 static int nfs_get_cb_ident_idr(struct nfs_client
*clp
, int minorversion
)
70 if (clp
->rpc_ops
->version
!= 4 || minorversion
!= 0)
73 if (!idr_pre_get(&cb_ident_idr
, GFP_KERNEL
))
75 spin_lock(&nfs_client_lock
);
76 ret
= idr_get_new(&cb_ident_idr
, clp
, &clp
->cl_cb_ident
);
77 spin_unlock(&nfs_client_lock
);
82 #endif /* CONFIG_NFS_V4 */
85 * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
87 static int nfs4_disable_idmapping
= 0;
92 static struct rpc_version
*nfs_version
[5] = {
102 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",
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 struct rpc_version
* nfsacl_version
[] = {
119 [3] = &nfsacl_version3
,
122 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
;
141 * Allocate a shared client record
143 * Since these are allocated/deallocated very rarely, we don't
144 * bother putting them in a slab cache...
146 static struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
148 struct nfs_client
*clp
;
149 struct rpc_cred
*cred
;
152 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
155 clp
->rpc_ops
= cl_init
->rpc_ops
;
157 atomic_set(&clp
->cl_count
, 1);
158 clp
->cl_cons_state
= NFS_CS_INITING
;
160 memcpy(&clp
->cl_addr
, cl_init
->addr
, cl_init
->addrlen
);
161 clp
->cl_addrlen
= cl_init
->addrlen
;
163 if (cl_init
->hostname
) {
165 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
166 if (!clp
->cl_hostname
)
170 INIT_LIST_HEAD(&clp
->cl_superblocks
);
171 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
173 clp
->cl_proto
= cl_init
->proto
;
176 err
= nfs_get_cb_ident_idr(clp
, cl_init
->minorversion
);
180 spin_lock_init(&clp
->cl_lock
);
181 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
182 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
183 clp
->cl_boot_time
= CURRENT_TIME
;
184 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
185 clp
->cl_minorversion
= cl_init
->minorversion
;
186 clp
->cl_mvops
= nfs_v4_minor_ops
[cl_init
->minorversion
];
188 cred
= rpc_lookup_machine_cred();
190 clp
->cl_machine_cred
= cred
;
191 nfs_fscache_get_client_cookie(clp
);
202 #ifdef CONFIG_NFS_V4_1
203 static void nfs4_shutdown_session(struct nfs_client
*clp
)
205 if (nfs4_has_session(clp
))
206 nfs4_destroy_session(clp
->cl_session
);
208 #else /* CONFIG_NFS_V4_1 */
209 static void nfs4_shutdown_session(struct nfs_client
*clp
)
212 #endif /* CONFIG_NFS_V4_1 */
215 * Destroy the NFS4 callback service
217 static void nfs4_destroy_callback(struct nfs_client
*clp
)
219 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
220 nfs_callback_down(clp
->cl_mvops
->minor_version
);
223 static void nfs4_shutdown_client(struct nfs_client
*clp
)
225 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
226 nfs4_kill_renewd(clp
);
227 nfs4_shutdown_session(clp
);
228 nfs4_destroy_callback(clp
);
229 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
230 nfs_idmap_delete(clp
);
232 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
235 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
236 void nfs_cleanup_cb_ident_idr(void)
238 idr_destroy(&cb_ident_idr
);
241 /* nfs_client_lock held */
242 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
244 if (clp
->cl_cb_ident
)
245 idr_remove(&cb_ident_idr
, clp
->cl_cb_ident
);
248 static void pnfs_init_server(struct nfs_server
*server
)
250 rpc_init_wait_queue(&server
->roc_rpcwaitq
, "pNFS ROC");
254 static void nfs4_shutdown_client(struct nfs_client
*clp
)
258 void nfs_cleanup_cb_ident_idr(void)
262 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
266 static void pnfs_init_server(struct nfs_server
*server
)
270 #endif /* CONFIG_NFS_V4 */
273 * Destroy a shared client record
275 static void nfs_free_client(struct nfs_client
*clp
)
277 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
279 nfs4_shutdown_client(clp
);
281 nfs_fscache_release_client_cookie(clp
);
283 /* -EIO all pending I/O */
284 if (!IS_ERR(clp
->cl_rpcclient
))
285 rpc_shutdown_client(clp
->cl_rpcclient
);
287 if (clp
->cl_machine_cred
!= NULL
)
288 put_rpccred(clp
->cl_machine_cred
);
290 nfs4_deviceid_purge_client(clp
);
292 kfree(clp
->cl_hostname
);
293 kfree(clp
->server_scope
);
296 dprintk("<-- nfs_free_client()\n");
300 * Release a reference to a shared client record
302 void nfs_put_client(struct nfs_client
*clp
)
307 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
309 if (atomic_dec_and_lock(&clp
->cl_count
, &nfs_client_lock
)) {
310 list_del(&clp
->cl_share_link
);
311 nfs_cb_idr_remove_locked(clp
);
312 spin_unlock(&nfs_client_lock
);
314 BUG_ON(!list_empty(&clp
->cl_superblocks
));
316 nfs_free_client(clp
);
319 EXPORT_SYMBOL_GPL(nfs_put_client
);
321 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
323 * Test if two ip6 socket addresses refer to the same socket by
324 * comparing relevant fields. The padding bytes specifically, are not
325 * compared. sin6_flowinfo is not compared because it only affects QoS
326 * and sin6_scope_id is only compared if the address is "link local"
327 * because "link local" addresses need only be unique to a specific
328 * link. Conversely, ordinary unicast addresses might have different
331 * The caller should ensure both socket addresses are AF_INET6.
333 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
334 const struct sockaddr
*sa2
)
336 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
337 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
339 if (ipv6_addr_scope(&sin1
->sin6_addr
) == IPV6_ADDR_SCOPE_LINKLOCAL
&&
340 sin1
->sin6_scope_id
!= sin2
->sin6_scope_id
)
343 return ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
);
345 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
346 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
347 const struct sockaddr
*sa2
)
354 * Test if two ip4 socket addresses refer to the same socket, by
355 * comparing relevant fields. The padding bytes specifically, are
358 * The caller should ensure both socket addresses are AF_INET.
360 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
361 const struct sockaddr
*sa2
)
363 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
364 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
366 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
369 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
370 const struct sockaddr
*sa2
)
372 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
373 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
375 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
376 (sin1
->sin6_port
== sin2
->sin6_port
);
379 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
380 const struct sockaddr
*sa2
)
382 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
383 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
385 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
386 (sin1
->sin_port
== sin2
->sin_port
);
390 * Test if two socket addresses represent the same actual socket,
391 * by comparing (only) relevant fields, excluding the port number.
393 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
394 const struct sockaddr
*sa2
)
396 if (sa1
->sa_family
!= sa2
->sa_family
)
399 switch (sa1
->sa_family
) {
401 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
403 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
409 * Test if two socket addresses represent the same actual socket,
410 * by comparing (only) relevant fields, including the port number.
412 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
413 const struct sockaddr
*sa2
)
415 if (sa1
->sa_family
!= sa2
->sa_family
)
418 switch (sa1
->sa_family
) {
420 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
422 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
427 /* Common match routine for v4.0 and v4.1 callback services */
429 nfs4_cb_match_client(const struct sockaddr
*addr
, struct nfs_client
*clp
,
432 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
434 /* Don't match clients that failed to initialise */
435 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
436 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
439 /* Match the version and minorversion */
440 if (clp
->rpc_ops
->version
!= 4 ||
441 clp
->cl_minorversion
!= minorversion
)
444 /* Match only the IP address, not the port number */
445 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
452 * Find an nfs_client on the list that matches the initialisation data
455 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
457 struct nfs_client
*clp
;
458 const struct sockaddr
*sap
= data
->addr
;
460 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
461 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
462 /* Don't match clients that failed to initialise properly */
463 if (clp
->cl_cons_state
< 0)
466 /* Different NFS versions cannot share the same nfs_client */
467 if (clp
->rpc_ops
!= data
->rpc_ops
)
470 if (clp
->cl_proto
!= data
->proto
)
472 /* Match nfsv4 minorversion */
473 if (clp
->cl_minorversion
!= data
->minorversion
)
475 /* Match the full socket address */
476 if (!nfs_sockaddr_cmp(sap
, clap
))
479 atomic_inc(&clp
->cl_count
);
486 * Look up a client by IP address and protocol version
487 * - creates a new record if one doesn't yet exist
489 static struct nfs_client
*
490 nfs_get_client(const struct nfs_client_initdata
*cl_init
,
491 const struct rpc_timeout
*timeparms
,
493 rpc_authflavor_t authflavour
,
496 struct nfs_client
*clp
, *new = NULL
;
499 dprintk("--> nfs_get_client(%s,v%u)\n",
500 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
502 /* see if the client already exists */
504 spin_lock(&nfs_client_lock
);
506 clp
= nfs_match_client(cl_init
);
512 spin_unlock(&nfs_client_lock
);
514 new = nfs_alloc_client(cl_init
);
515 } while (!IS_ERR(new));
517 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
520 /* install a new client and return with it unready */
523 list_add(&clp
->cl_share_link
, &nfs_client_list
);
524 spin_unlock(&nfs_client_lock
);
526 error
= cl_init
->rpc_ops
->init_client(clp
, timeparms
, ip_addr
,
527 authflavour
, noresvport
);
530 return ERR_PTR(error
);
532 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
535 /* found an existing client
536 * - make sure it's ready before returning
539 spin_unlock(&nfs_client_lock
);
542 nfs_free_client(new);
544 error
= wait_event_killable(nfs_client_active_wq
,
545 clp
->cl_cons_state
< NFS_CS_INITING
);
548 return ERR_PTR(-ERESTARTSYS
);
551 if (clp
->cl_cons_state
< NFS_CS_READY
) {
552 error
= clp
->cl_cons_state
;
554 return ERR_PTR(error
);
557 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
559 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
564 * Mark a server as ready or failed
566 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
568 clp
->cl_cons_state
= state
;
569 wake_up_all(&nfs_client_active_wq
);
573 * With sessions, the client is not marked ready until after a
574 * successful EXCHANGE_ID and CREATE_SESSION.
576 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
577 * other versions of NFS can be tried.
579 int nfs4_check_client_ready(struct nfs_client
*clp
)
581 if (!nfs4_has_session(clp
))
583 if (clp
->cl_cons_state
< NFS_CS_READY
)
584 return -EPROTONOSUPPORT
;
589 * Initialise the timeout values for a connection
591 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
592 unsigned int timeo
, unsigned int retrans
)
594 to
->to_initval
= timeo
* HZ
/ 10;
595 to
->to_retries
= retrans
;
598 case XPRT_TRANSPORT_TCP
:
599 case XPRT_TRANSPORT_RDMA
:
600 if (to
->to_retries
== 0)
601 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
602 if (to
->to_initval
== 0)
603 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
604 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
605 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
606 to
->to_increment
= to
->to_initval
;
607 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
608 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
609 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
610 if (to
->to_maxval
< to
->to_initval
)
611 to
->to_maxval
= to
->to_initval
;
612 to
->to_exponential
= 0;
614 case XPRT_TRANSPORT_UDP
:
615 if (to
->to_retries
== 0)
616 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
618 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
619 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
620 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
621 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
622 to
->to_exponential
= 1;
630 * Create an RPC client handle
632 static int nfs_create_rpc_client(struct nfs_client
*clp
,
633 const struct rpc_timeout
*timeparms
,
634 rpc_authflavor_t flavor
,
635 int discrtry
, int noresvport
)
637 struct rpc_clnt
*clnt
= NULL
;
638 struct rpc_create_args args
= {
640 .protocol
= clp
->cl_proto
,
641 .address
= (struct sockaddr
*)&clp
->cl_addr
,
642 .addrsize
= clp
->cl_addrlen
,
643 .timeout
= timeparms
,
644 .servername
= clp
->cl_hostname
,
645 .program
= &nfs_program
,
646 .version
= clp
->rpc_ops
->version
,
647 .authflavor
= flavor
,
651 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
653 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
655 if (!IS_ERR(clp
->cl_rpcclient
))
658 clnt
= rpc_create(&args
);
660 dprintk("%s: cannot create RPC client. Error = %ld\n",
661 __func__
, PTR_ERR(clnt
));
662 return PTR_ERR(clnt
);
665 clp
->cl_rpcclient
= clnt
;
670 * Version 2 or 3 client destruction
672 static void nfs_destroy_server(struct nfs_server
*server
)
674 if (!(server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) ||
675 !(server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
676 nlmclnt_done(server
->nlm_host
);
680 * Version 2 or 3 lockd setup
682 static int nfs_start_lockd(struct nfs_server
*server
)
684 struct nlm_host
*host
;
685 struct nfs_client
*clp
= server
->nfs_client
;
686 struct nlmclnt_initdata nlm_init
= {
687 .hostname
= clp
->cl_hostname
,
688 .address
= (struct sockaddr
*)&clp
->cl_addr
,
689 .addrlen
= clp
->cl_addrlen
,
690 .nfs_version
= clp
->rpc_ops
->version
,
691 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
695 if (nlm_init
.nfs_version
> 3)
697 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
698 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
701 switch (clp
->cl_proto
) {
703 nlm_init
.protocol
= IPPROTO_TCP
;
705 case XPRT_TRANSPORT_UDP
:
706 nlm_init
.protocol
= IPPROTO_UDP
;
709 host
= nlmclnt_init(&nlm_init
);
711 return PTR_ERR(host
);
713 server
->nlm_host
= host
;
714 server
->destroy
= nfs_destroy_server
;
719 * Initialise an NFSv3 ACL client connection
721 #ifdef CONFIG_NFS_V3_ACL
722 static void nfs_init_server_aclclient(struct nfs_server
*server
)
724 if (server
->nfs_client
->rpc_ops
->version
!= 3)
726 if (server
->flags
& NFS_MOUNT_NOACL
)
729 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
730 if (IS_ERR(server
->client_acl
))
733 /* No errors! Assume that Sun nfsacls are supported */
734 server
->caps
|= NFS_CAP_ACLS
;
738 server
->caps
&= ~NFS_CAP_ACLS
;
741 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
743 server
->flags
&= ~NFS_MOUNT_NOACL
;
744 server
->caps
&= ~NFS_CAP_ACLS
;
749 * Create a general RPC client
751 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
752 const struct rpc_timeout
*timeo
,
753 rpc_authflavor_t pseudoflavour
)
755 struct nfs_client
*clp
= server
->nfs_client
;
757 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
758 if (IS_ERR(server
->client
)) {
759 dprintk("%s: couldn't create rpc_client!\n", __func__
);
760 return PTR_ERR(server
->client
);
763 memcpy(&server
->client
->cl_timeout_default
,
765 sizeof(server
->client
->cl_timeout_default
));
766 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
768 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
769 struct rpc_auth
*auth
;
771 auth
= rpcauth_create(pseudoflavour
, server
->client
);
773 dprintk("%s: couldn't create credcache!\n", __func__
);
774 return PTR_ERR(auth
);
777 server
->client
->cl_softrtry
= 0;
778 if (server
->flags
& NFS_MOUNT_SOFT
)
779 server
->client
->cl_softrtry
= 1;
785 * Initialise an NFS2 or NFS3 client
787 int nfs_init_client(struct nfs_client
*clp
, const struct rpc_timeout
*timeparms
,
788 const char *ip_addr
, rpc_authflavor_t authflavour
,
793 if (clp
->cl_cons_state
== NFS_CS_READY
) {
794 /* the client is already initialised */
795 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
800 * Create a client RPC handle for doing FSSTAT with UNIX auth only
801 * - RFC 2623, sec 2.3.2
803 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
,
807 nfs_mark_client_ready(clp
, NFS_CS_READY
);
811 nfs_mark_client_ready(clp
, error
);
812 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
817 * Create a version 2 or 3 client
819 static int nfs_init_server(struct nfs_server
*server
,
820 const struct nfs_parsed_mount_data
*data
)
822 struct nfs_client_initdata cl_init
= {
823 .hostname
= data
->nfs_server
.hostname
,
824 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
825 .addrlen
= data
->nfs_server
.addrlen
,
826 .rpc_ops
= &nfs_v2_clientops
,
827 .proto
= data
->nfs_server
.protocol
,
829 struct rpc_timeout timeparms
;
830 struct nfs_client
*clp
;
833 dprintk("--> nfs_init_server()\n");
836 if (data
->version
== 3)
837 cl_init
.rpc_ops
= &nfs_v3_clientops
;
840 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
841 data
->timeo
, data
->retrans
);
843 /* Allocate or find a client reference we can use */
844 clp
= nfs_get_client(&cl_init
, &timeparms
, NULL
, RPC_AUTH_UNIX
,
845 data
->flags
& NFS_MOUNT_NORESVPORT
);
847 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
851 server
->nfs_client
= clp
;
853 /* Initialise the client representation from the mount data */
854 server
->flags
= data
->flags
;
855 server
->options
= data
->options
;
856 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
857 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
858 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
;
861 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
863 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
865 server
->acregmin
= data
->acregmin
* HZ
;
866 server
->acregmax
= data
->acregmax
* HZ
;
867 server
->acdirmin
= data
->acdirmin
* HZ
;
868 server
->acdirmax
= data
->acdirmax
* HZ
;
870 /* Start lockd here, before we might error out */
871 error
= nfs_start_lockd(server
);
875 server
->port
= data
->nfs_server
.port
;
877 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
881 /* Preserve the values of mount_server-related mount options */
882 if (data
->mount_server
.addrlen
) {
883 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
884 data
->mount_server
.addrlen
);
885 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
887 server
->mountd_version
= data
->mount_server
.version
;
888 server
->mountd_port
= data
->mount_server
.port
;
889 server
->mountd_protocol
= data
->mount_server
.protocol
;
891 server
->namelen
= data
->namlen
;
892 /* Create a client RPC handle for the NFSv3 ACL management interface */
893 nfs_init_server_aclclient(server
);
894 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
898 server
->nfs_client
= NULL
;
900 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
905 * Load up the server record from information gained in an fsinfo record
907 static void nfs_server_set_fsinfo(struct nfs_server
*server
, struct nfs_fsinfo
*fsinfo
)
909 unsigned long max_rpc_payload
;
911 /* Work out a lot of parameters */
912 if (server
->rsize
== 0)
913 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
914 if (server
->wsize
== 0)
915 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
917 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
918 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
919 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
920 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
922 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
923 if (server
->rsize
> max_rpc_payload
)
924 server
->rsize
= max_rpc_payload
;
925 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
926 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
927 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
929 server
->backing_dev_info
.name
= "nfs";
930 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
932 if (server
->wsize
> max_rpc_payload
)
933 server
->wsize
= max_rpc_payload
;
934 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
935 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
936 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
937 set_pnfs_layoutdriver(server
, fsinfo
->layouttype
);
939 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
941 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
942 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
943 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
944 if (server
->dtsize
> server
->rsize
)
945 server
->dtsize
= server
->rsize
;
947 if (server
->flags
& NFS_MOUNT_NOAC
) {
948 server
->acregmin
= server
->acregmax
= 0;
949 server
->acdirmin
= server
->acdirmax
= 0;
952 server
->maxfilesize
= fsinfo
->maxfilesize
;
954 server
->time_delta
= fsinfo
->time_delta
;
956 /* We're airborne Set socket buffersize */
957 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
961 * Probe filesystem information, including the FSID on v2/v3
963 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
965 struct nfs_fsinfo fsinfo
;
966 struct nfs_client
*clp
= server
->nfs_client
;
969 dprintk("--> nfs_probe_fsinfo()\n");
971 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
972 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
977 fsinfo
.fattr
= fattr
;
978 fsinfo
.layouttype
= 0;
979 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
983 nfs_server_set_fsinfo(server
, &fsinfo
);
985 /* Get some general file system info */
986 if (server
->namelen
== 0) {
987 struct nfs_pathconf pathinfo
;
989 pathinfo
.fattr
= fattr
;
990 nfs_fattr_init(fattr
);
992 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
993 server
->namelen
= pathinfo
.max_namelen
;
996 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1000 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
1005 * Copy useful information when duplicating a server record
1007 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
1009 target
->flags
= source
->flags
;
1010 target
->rsize
= source
->rsize
;
1011 target
->wsize
= source
->wsize
;
1012 target
->acregmin
= source
->acregmin
;
1013 target
->acregmax
= source
->acregmax
;
1014 target
->acdirmin
= source
->acdirmin
;
1015 target
->acdirmax
= source
->acdirmax
;
1016 target
->caps
= source
->caps
;
1017 target
->options
= source
->options
;
1020 static void nfs_server_insert_lists(struct nfs_server
*server
)
1022 struct nfs_client
*clp
= server
->nfs_client
;
1024 spin_lock(&nfs_client_lock
);
1025 list_add_tail_rcu(&server
->client_link
, &clp
->cl_superblocks
);
1026 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1027 clear_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1028 spin_unlock(&nfs_client_lock
);
1032 static void nfs_server_remove_lists(struct nfs_server
*server
)
1034 struct nfs_client
*clp
= server
->nfs_client
;
1036 spin_lock(&nfs_client_lock
);
1037 list_del_rcu(&server
->client_link
);
1038 if (clp
&& list_empty(&clp
->cl_superblocks
))
1039 set_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1040 list_del(&server
->master_link
);
1041 spin_unlock(&nfs_client_lock
);
1047 * Allocate and initialise a server record
1049 static struct nfs_server
*nfs_alloc_server(void)
1051 struct nfs_server
*server
;
1053 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1057 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
1059 /* Zero out the NFS state stuff */
1060 INIT_LIST_HEAD(&server
->client_link
);
1061 INIT_LIST_HEAD(&server
->master_link
);
1062 INIT_LIST_HEAD(&server
->delegations
);
1063 INIT_LIST_HEAD(&server
->layouts
);
1065 atomic_set(&server
->active
, 0);
1067 server
->io_stats
= nfs_alloc_iostats();
1068 if (!server
->io_stats
) {
1073 if (bdi_init(&server
->backing_dev_info
)) {
1074 nfs_free_iostats(server
->io_stats
);
1079 pnfs_init_server(server
);
1085 * Free up a server record
1087 void nfs_free_server(struct nfs_server
*server
)
1089 dprintk("--> nfs_free_server()\n");
1091 nfs_server_remove_lists(server
);
1092 unset_pnfs_layoutdriver(server
);
1094 if (server
->destroy
!= NULL
)
1095 server
->destroy(server
);
1097 if (!IS_ERR(server
->client_acl
))
1098 rpc_shutdown_client(server
->client_acl
);
1099 if (!IS_ERR(server
->client
))
1100 rpc_shutdown_client(server
->client
);
1102 nfs_put_client(server
->nfs_client
);
1104 nfs_free_iostats(server
->io_stats
);
1105 bdi_destroy(&server
->backing_dev_info
);
1107 nfs_release_automount_timer();
1108 dprintk("<-- nfs_free_server()\n");
1112 * Create a version 2 or 3 volume record
1113 * - keyed on server and FSID
1115 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1116 struct nfs_fh
*mntfh
)
1118 struct nfs_server
*server
;
1119 struct nfs_fattr
*fattr
;
1122 server
= nfs_alloc_server();
1124 return ERR_PTR(-ENOMEM
);
1127 fattr
= nfs_alloc_fattr();
1131 /* Get a client representation */
1132 error
= nfs_init_server(server
, data
);
1136 BUG_ON(!server
->nfs_client
);
1137 BUG_ON(!server
->nfs_client
->rpc_ops
);
1138 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1140 /* Probe the root fh to retrieve its FSID */
1141 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1144 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1145 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1146 server
->namelen
= NFS3_MAXNAMLEN
;
1147 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1148 server
->caps
|= NFS_CAP_READDIRPLUS
;
1150 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1151 server
->namelen
= NFS2_MAXNAMLEN
;
1154 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1155 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, fattr
);
1157 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1161 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1163 dprintk("Server FSID: %llx:%llx\n",
1164 (unsigned long long) server
->fsid
.major
,
1165 (unsigned long long) server
->fsid
.minor
);
1167 nfs_server_insert_lists(server
);
1168 server
->mount_time
= jiffies
;
1169 nfs_free_fattr(fattr
);
1173 nfs_free_fattr(fattr
);
1174 nfs_free_server(server
);
1175 return ERR_PTR(error
);
1178 #ifdef CONFIG_NFS_V4
1180 * NFSv4.0 callback thread helper
1182 * Find a client by IP address, protocol version, and minorversion
1184 * Called from the pg_authenticate method. The callback identifier
1185 * is not used as it has not been decoded.
1187 * Returns NULL if no such client
1190 nfs4_find_client_no_ident(const struct sockaddr
*addr
)
1192 struct nfs_client
*clp
;
1194 spin_lock(&nfs_client_lock
);
1195 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
1196 if (nfs4_cb_match_client(addr
, clp
, 0) == false)
1198 atomic_inc(&clp
->cl_count
);
1199 spin_unlock(&nfs_client_lock
);
1202 spin_unlock(&nfs_client_lock
);
1207 * NFSv4.0 callback thread helper
1209 * Find a client by callback identifier
1212 nfs4_find_client_ident(int cb_ident
)
1214 struct nfs_client
*clp
;
1216 spin_lock(&nfs_client_lock
);
1217 clp
= idr_find(&cb_ident_idr
, cb_ident
);
1219 atomic_inc(&clp
->cl_count
);
1220 spin_unlock(&nfs_client_lock
);
1224 #if defined(CONFIG_NFS_V4_1)
1226 * NFSv4.1 callback thread helper
1227 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1228 * minorversion, and sessionID
1230 * Returns NULL if no such client
1233 nfs4_find_client_sessionid(const struct sockaddr
*addr
,
1234 struct nfs4_sessionid
*sid
)
1236 struct nfs_client
*clp
;
1238 spin_lock(&nfs_client_lock
);
1239 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
1240 if (nfs4_cb_match_client(addr
, clp
, 1) == false)
1243 if (!nfs4_has_session(clp
))
1246 /* Match sessionid*/
1247 if (memcmp(clp
->cl_session
->sess_id
.data
,
1248 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
1251 atomic_inc(&clp
->cl_count
);
1252 spin_unlock(&nfs_client_lock
);
1255 spin_unlock(&nfs_client_lock
);
1259 #else /* CONFIG_NFS_V4_1 */
1262 nfs4_find_client_sessionid(const struct sockaddr
*addr
,
1263 struct nfs4_sessionid
*sid
)
1267 #endif /* CONFIG_NFS_V4_1 */
1270 * Initialize the NFS4 callback service
1272 static int nfs4_init_callback(struct nfs_client
*clp
)
1276 if (clp
->rpc_ops
->version
== 4) {
1277 if (nfs4_has_session(clp
)) {
1278 error
= xprt_setup_backchannel(
1279 clp
->cl_rpcclient
->cl_xprt
,
1280 NFS41_BC_MIN_CALLBACKS
);
1285 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
,
1286 clp
->cl_rpcclient
->cl_xprt
);
1288 dprintk("%s: failed to start callback. Error = %d\n",
1292 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
1298 * Initialize the minor version specific parts of an NFS4 client record
1300 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
1302 #if defined(CONFIG_NFS_V4_1)
1303 if (clp
->cl_mvops
->minor_version
) {
1304 struct nfs4_session
*session
= NULL
;
1306 * Create the session and mark it expired.
1307 * When a SEQUENCE operation encounters the expired session
1308 * it will do session recovery to initialize it.
1310 session
= nfs4_alloc_session(clp
);
1314 clp
->cl_session
= session
;
1316 * The create session reply races with the server back
1317 * channel probe. Mark the client NFS_CS_SESSION_INITING
1318 * so that the client back channel can find the
1321 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
1323 #endif /* CONFIG_NFS_V4_1 */
1325 return nfs4_init_callback(clp
);
1329 * Initialise an NFS4 client record
1331 int nfs4_init_client(struct nfs_client
*clp
,
1332 const struct rpc_timeout
*timeparms
,
1333 const char *ip_addr
,
1334 rpc_authflavor_t authflavour
,
1339 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1340 /* the client is initialised already */
1341 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1345 /* Check NFS protocol revision and initialize RPC op vector */
1346 clp
->rpc_ops
= &nfs_v4_clientops
;
1348 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
,
1352 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1354 error
= nfs_idmap_new(clp
);
1356 dprintk("%s: failed to create idmapper. Error = %d\n",
1360 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1362 error
= nfs4_init_client_minor_version(clp
);
1366 if (!nfs4_has_session(clp
))
1367 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1371 nfs_mark_client_ready(clp
, error
);
1372 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1377 * Set up an NFS4 client
1379 static int nfs4_set_client(struct nfs_server
*server
,
1380 const char *hostname
,
1381 const struct sockaddr
*addr
,
1382 const size_t addrlen
,
1383 const char *ip_addr
,
1384 rpc_authflavor_t authflavour
,
1385 int proto
, const struct rpc_timeout
*timeparms
,
1388 struct nfs_client_initdata cl_init
= {
1389 .hostname
= hostname
,
1392 .rpc_ops
= &nfs_v4_clientops
,
1394 .minorversion
= minorversion
,
1396 struct nfs_client
*clp
;
1399 dprintk("--> nfs4_set_client()\n");
1401 /* Allocate or find a client reference we can use */
1402 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
,
1403 server
->flags
& NFS_MOUNT_NORESVPORT
);
1405 error
= PTR_ERR(clp
);
1410 * Query for the lease time on clientid setup or renewal
1412 * Note that this will be set on nfs_clients that were created
1413 * only for the DS role and did not set this bit, but now will
1414 * serve a dual role.
1416 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
1418 server
->nfs_client
= clp
;
1419 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1422 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1427 * Set up a pNFS Data Server client.
1429 * Return any existing nfs_client that matches server address,port,version
1432 * For a new nfs_client, use a soft mount (default), a low retrans and a
1433 * low timeout interval so that if a connection is lost, we retry through
1436 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
1437 const struct sockaddr
*ds_addr
,
1438 int ds_addrlen
, int ds_proto
)
1440 struct nfs_client_initdata cl_init
= {
1442 .addrlen
= ds_addrlen
,
1443 .rpc_ops
= &nfs_v4_clientops
,
1445 .minorversion
= mds_clp
->cl_minorversion
,
1447 struct rpc_timeout ds_timeout
= {
1448 .to_initval
= 15 * HZ
,
1449 .to_maxval
= 15 * HZ
,
1451 .to_exponential
= 1,
1453 struct nfs_client
*clp
;
1456 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1457 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1458 * (section 13.1 RFC 5661).
1460 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
1461 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
, 0);
1463 dprintk("<-- %s %p\n", __func__
, clp
);
1466 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
1469 * Session has been established, and the client marked ready.
1470 * Set the mount rsize and wsize with negotiated fore channel
1471 * attributes which will be bound checked in nfs_server_set_fsinfo.
1473 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1475 #ifdef CONFIG_NFS_V4_1
1476 struct nfs4_session
*sess
;
1480 if (!nfs4_has_session(server
->nfs_client
))
1482 sess
= server
->nfs_client
->cl_session
;
1483 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
1484 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
1486 if (server
->rsize
> server_resp_sz
)
1487 server
->rsize
= server_resp_sz
;
1488 if (server
->wsize
> server_rqst_sz
)
1489 server
->wsize
= server_rqst_sz
;
1490 #endif /* CONFIG_NFS_V4_1 */
1493 static int nfs4_server_common_setup(struct nfs_server
*server
,
1494 struct nfs_fh
*mntfh
)
1496 struct nfs_fattr
*fattr
;
1499 BUG_ON(!server
->nfs_client
);
1500 BUG_ON(!server
->nfs_client
->rpc_ops
);
1501 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1503 /* data servers support only a subset of NFSv4.1 */
1504 if (is_ds_only_client(server
->nfs_client
))
1505 return -EPROTONOSUPPORT
;
1507 fattr
= nfs_alloc_fattr();
1511 /* We must ensure the session is initialised first */
1512 error
= nfs4_init_session(server
);
1516 /* Probe the root fh to retrieve its FSID and filehandle */
1517 error
= nfs4_get_rootfh(server
, mntfh
);
1521 dprintk("Server FSID: %llx:%llx\n",
1522 (unsigned long long) server
->fsid
.major
,
1523 (unsigned long long) server
->fsid
.minor
);
1524 dprintk("Mount FH: %d\n", mntfh
->size
);
1526 nfs4_session_set_rwsize(server
);
1528 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1532 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1533 server
->namelen
= NFS4_MAXNAMLEN
;
1535 nfs_server_insert_lists(server
);
1536 server
->mount_time
= jiffies
;
1538 nfs_free_fattr(fattr
);
1543 * Create a version 4 volume record
1545 static int nfs4_init_server(struct nfs_server
*server
,
1546 const struct nfs_parsed_mount_data
*data
)
1548 struct rpc_timeout timeparms
;
1551 dprintk("--> nfs4_init_server()\n");
1553 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1554 data
->timeo
, data
->retrans
);
1556 /* Initialise the client representation from the mount data */
1557 server
->flags
= data
->flags
;
1558 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
|NFS_CAP_POSIX_LOCK
;
1559 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1560 server
->caps
|= NFS_CAP_READDIRPLUS
;
1561 server
->options
= data
->options
;
1563 /* Get a client record */
1564 error
= nfs4_set_client(server
,
1565 data
->nfs_server
.hostname
,
1566 (const struct sockaddr
*)&data
->nfs_server
.address
,
1567 data
->nfs_server
.addrlen
,
1568 data
->client_address
,
1569 data
->auth_flavors
[0],
1570 data
->nfs_server
.protocol
,
1572 data
->minorversion
);
1577 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1580 if (nfs4_disable_idmapping
&& data
->auth_flavors
[0] == RPC_AUTH_UNIX
)
1581 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
1584 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1586 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1588 server
->acregmin
= data
->acregmin
* HZ
;
1589 server
->acregmax
= data
->acregmax
* HZ
;
1590 server
->acdirmin
= data
->acdirmin
* HZ
;
1591 server
->acdirmax
= data
->acdirmax
* HZ
;
1593 server
->port
= data
->nfs_server
.port
;
1595 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1599 dprintk("<-- nfs4_init_server() = %d\n", error
);
1604 * Create a version 4 volume record
1605 * - keyed on server and FSID
1607 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1608 struct nfs_fh
*mntfh
)
1610 struct nfs_server
*server
;
1613 dprintk("--> nfs4_create_server()\n");
1615 server
= nfs_alloc_server();
1617 return ERR_PTR(-ENOMEM
);
1619 /* set up the general RPC client */
1620 error
= nfs4_init_server(server
, data
);
1624 error
= nfs4_server_common_setup(server
, mntfh
);
1628 dprintk("<-- nfs4_create_server() = %p\n", server
);
1632 nfs_free_server(server
);
1633 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1634 return ERR_PTR(error
);
1638 * Create an NFS4 referral server record
1640 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1641 struct nfs_fh
*mntfh
)
1643 struct nfs_client
*parent_client
;
1644 struct nfs_server
*server
, *parent_server
;
1647 dprintk("--> nfs4_create_referral_server()\n");
1649 server
= nfs_alloc_server();
1651 return ERR_PTR(-ENOMEM
);
1653 parent_server
= NFS_SB(data
->sb
);
1654 parent_client
= parent_server
->nfs_client
;
1656 /* Initialise the client representation from the parent server */
1657 nfs_server_copy_userdata(server
, parent_server
);
1658 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1660 /* Get a client representation.
1661 * Note: NFSv4 always uses TCP, */
1662 error
= nfs4_set_client(server
, data
->hostname
,
1665 parent_client
->cl_ipaddr
,
1667 parent_server
->client
->cl_xprt
->prot
,
1668 parent_server
->client
->cl_timeout
,
1669 parent_client
->cl_mvops
->minor_version
);
1673 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1677 error
= nfs4_server_common_setup(server
, mntfh
);
1681 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1685 nfs_free_server(server
);
1686 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1687 return ERR_PTR(error
);
1690 #endif /* CONFIG_NFS_V4 */
1693 * Clone an NFS2, NFS3 or NFS4 server record
1695 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1697 struct nfs_fattr
*fattr
)
1699 struct nfs_server
*server
;
1700 struct nfs_fattr
*fattr_fsinfo
;
1703 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1704 (unsigned long long) fattr
->fsid
.major
,
1705 (unsigned long long) fattr
->fsid
.minor
);
1707 server
= nfs_alloc_server();
1709 return ERR_PTR(-ENOMEM
);
1712 fattr_fsinfo
= nfs_alloc_fattr();
1713 if (fattr_fsinfo
== NULL
)
1714 goto out_free_server
;
1716 /* Copy data from the source */
1717 server
->nfs_client
= source
->nfs_client
;
1718 atomic_inc(&server
->nfs_client
->cl_count
);
1719 nfs_server_copy_userdata(server
, source
);
1721 server
->fsid
= fattr
->fsid
;
1723 error
= nfs_init_server_rpcclient(server
,
1724 source
->client
->cl_timeout
,
1725 source
->client
->cl_auth
->au_flavor
);
1727 goto out_free_server
;
1728 if (!IS_ERR(source
->client_acl
))
1729 nfs_init_server_aclclient(server
);
1731 /* probe the filesystem info for this server filesystem */
1732 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1734 goto out_free_server
;
1736 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1737 server
->namelen
= NFS4_MAXNAMLEN
;
1739 dprintk("Cloned FSID: %llx:%llx\n",
1740 (unsigned long long) server
->fsid
.major
,
1741 (unsigned long long) server
->fsid
.minor
);
1743 error
= nfs_start_lockd(server
);
1745 goto out_free_server
;
1747 nfs_server_insert_lists(server
);
1748 server
->mount_time
= jiffies
;
1750 nfs_free_fattr(fattr_fsinfo
);
1751 dprintk("<-- nfs_clone_server() = %p\n", server
);
1755 nfs_free_fattr(fattr_fsinfo
);
1756 nfs_free_server(server
);
1757 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1758 return ERR_PTR(error
);
1761 #ifdef CONFIG_PROC_FS
1762 static struct proc_dir_entry
*proc_fs_nfs
;
1764 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1765 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1766 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1767 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1768 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1770 static const struct seq_operations nfs_server_list_ops
= {
1771 .start
= nfs_server_list_start
,
1772 .next
= nfs_server_list_next
,
1773 .stop
= nfs_server_list_stop
,
1774 .show
= nfs_server_list_show
,
1777 static const struct file_operations nfs_server_list_fops
= {
1778 .open
= nfs_server_list_open
,
1780 .llseek
= seq_lseek
,
1781 .release
= seq_release
,
1782 .owner
= THIS_MODULE
,
1785 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1786 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1787 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1788 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1789 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1791 static const struct seq_operations nfs_volume_list_ops
= {
1792 .start
= nfs_volume_list_start
,
1793 .next
= nfs_volume_list_next
,
1794 .stop
= nfs_volume_list_stop
,
1795 .show
= nfs_volume_list_show
,
1798 static const struct file_operations nfs_volume_list_fops
= {
1799 .open
= nfs_volume_list_open
,
1801 .llseek
= seq_lseek
,
1802 .release
= seq_release
,
1803 .owner
= THIS_MODULE
,
1807 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1810 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1815 ret
= seq_open(file
, &nfs_server_list_ops
);
1819 m
= file
->private_data
;
1820 m
->private = PDE(inode
)->data
;
1826 * set up the iterator to start reading from the server list and return the first item
1828 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1830 /* lock the list against modification */
1831 spin_lock(&nfs_client_lock
);
1832 return seq_list_start_head(&nfs_client_list
, *_pos
);
1836 * move to next server
1838 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1840 return seq_list_next(v
, &nfs_client_list
, pos
);
1844 * clean up after reading from the transports list
1846 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1848 spin_unlock(&nfs_client_lock
);
1852 * display a header line followed by a load of call lines
1854 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1856 struct nfs_client
*clp
;
1858 /* display header on line 1 */
1859 if (v
== &nfs_client_list
) {
1860 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1864 /* display one transport per line on subsequent lines */
1865 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1867 seq_printf(m
, "v%u %s %s %3d %s\n",
1868 clp
->rpc_ops
->version
,
1869 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1870 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1871 atomic_read(&clp
->cl_count
),
1878 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1880 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1885 ret
= seq_open(file
, &nfs_volume_list_ops
);
1889 m
= file
->private_data
;
1890 m
->private = PDE(inode
)->data
;
1896 * set up the iterator to start reading from the volume list and return the first item
1898 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1900 /* lock the list against modification */
1901 spin_lock(&nfs_client_lock
);
1902 return seq_list_start_head(&nfs_volume_list
, *_pos
);
1906 * move to next volume
1908 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1910 return seq_list_next(v
, &nfs_volume_list
, pos
);
1914 * clean up after reading from the transports list
1916 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1918 spin_unlock(&nfs_client_lock
);
1922 * display a header line followed by a load of call lines
1924 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1926 struct nfs_server
*server
;
1927 struct nfs_client
*clp
;
1928 char dev
[8], fsid
[17];
1930 /* display header on line 1 */
1931 if (v
== &nfs_volume_list
) {
1932 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1935 /* display one transport per line on subsequent lines */
1936 server
= list_entry(v
, struct nfs_server
, master_link
);
1937 clp
= server
->nfs_client
;
1939 snprintf(dev
, 8, "%u:%u",
1940 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1942 snprintf(fsid
, 17, "%llx:%llx",
1943 (unsigned long long) server
->fsid
.major
,
1944 (unsigned long long) server
->fsid
.minor
);
1946 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1947 clp
->rpc_ops
->version
,
1948 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1949 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1952 nfs_server_fscache_state(server
));
1958 * initialise the /proc/fs/nfsfs/ directory
1960 int __init
nfs_fs_proc_init(void)
1962 struct proc_dir_entry
*p
;
1964 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1968 /* a file of servers with which we're dealing */
1969 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1970 proc_fs_nfs
, &nfs_server_list_fops
);
1974 /* a file of volumes that we have mounted */
1975 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1976 proc_fs_nfs
, &nfs_volume_list_fops
);
1982 remove_proc_entry("servers", proc_fs_nfs
);
1984 remove_proc_entry("fs/nfsfs", NULL
);
1990 * clean up the /proc/fs/nfsfs/ directory
1992 void nfs_fs_proc_exit(void)
1994 remove_proc_entry("volumes", proc_fs_nfs
);
1995 remove_proc_entry("servers", proc_fs_nfs
);
1996 remove_proc_entry("fs/nfsfs", NULL
);
1999 #endif /* CONFIG_PROC_FS */
2001 module_param(nfs4_disable_idmapping
, bool, 0644);
2002 MODULE_PARM_DESC(nfs4_disable_idmapping
,
2003 "Turn off NFSv4 idmapping when using 'sec=sys'");