1 /* client.c: NFS client sharing and management code
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include <linux/time.h>
17 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/stat.h>
21 #include <linux/errno.h>
22 #include <linux/unistd.h>
23 #include <linux/sunrpc/clnt.h>
24 #include <linux/sunrpc/stats.h>
25 #include <linux/sunrpc/metrics.h>
26 #include <linux/sunrpc/xprtsock.h>
27 #include <linux/sunrpc/xprtrdma.h>
28 #include <linux/nfs_fs.h>
29 #include <linux/nfs_mount.h>
30 #include <linux/nfs4_mount.h>
31 #include <linux/lockd/bind.h>
32 #include <linux/seq_file.h>
33 #include <linux/mount.h>
34 #include <linux/nfs_idmap.h>
35 #include <linux/vfs.h>
36 #include <linux/inet.h>
37 #include <linux/in6.h>
38 #include <linux/slab.h>
39 #include <linux/idr.h>
41 #include <linux/nfs_xdr.h>
42 #include <linux/sunrpc/bc_xprt.h>
44 #include <asm/system.h>
48 #include "delegation.h"
54 #define NFSDBG_FACILITY NFSDBG_CLIENT
56 static DEFINE_SPINLOCK(nfs_client_lock
);
57 static LIST_HEAD(nfs_client_list
);
58 static LIST_HEAD(nfs_volume_list
);
59 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
61 static DEFINE_IDR(cb_ident_idr
); /* Protected by nfs_client_lock */
64 * Get a unique NFSv4.0 callback identifier which will be used
65 * by the V4.0 callback service to lookup the nfs_client struct
67 static int nfs_get_cb_ident_idr(struct nfs_client
*clp
, int minorversion
)
71 if (clp
->rpc_ops
->version
!= 4 || minorversion
!= 0)
74 if (!idr_pre_get(&cb_ident_idr
, GFP_KERNEL
))
76 spin_lock(&nfs_client_lock
);
77 ret
= idr_get_new(&cb_ident_idr
, clp
, &clp
->cl_cb_ident
);
78 spin_unlock(&nfs_client_lock
);
83 #endif /* CONFIG_NFS_V4 */
86 * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
88 static bool nfs4_disable_idmapping
= true;
93 static struct rpc_version
*nfs_version
[5] = {
103 struct rpc_program nfs_program
= {
105 .number
= NFS_PROGRAM
,
106 .nrvers
= ARRAY_SIZE(nfs_version
),
107 .version
= nfs_version
,
108 .stats
= &nfs_rpcstat
,
109 .pipe_dir_name
= NFS_PIPE_DIRNAME
,
112 struct rpc_stat nfs_rpcstat
= {
113 .program
= &nfs_program
117 #ifdef CONFIG_NFS_V3_ACL
118 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
119 static struct rpc_version
* nfsacl_version
[] = {
120 [3] = &nfsacl_version3
,
123 struct rpc_program nfsacl_program
= {
125 .number
= NFS_ACL_PROGRAM
,
126 .nrvers
= ARRAY_SIZE(nfsacl_version
),
127 .version
= nfsacl_version
,
128 .stats
= &nfsacl_rpcstat
,
130 #endif /* CONFIG_NFS_V3_ACL */
132 struct nfs_client_initdata
{
133 const char *hostname
;
134 const struct sockaddr
*addr
;
136 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
;
177 err
= nfs_get_cb_ident_idr(clp
, cl_init
->minorversion
);
181 spin_lock_init(&clp
->cl_lock
);
182 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
183 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
184 clp
->cl_boot_time
= CURRENT_TIME
;
185 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
186 clp
->cl_minorversion
= cl_init
->minorversion
;
187 clp
->cl_mvops
= nfs_v4_minor_ops
[cl_init
->minorversion
];
189 cred
= rpc_lookup_machine_cred("*");
191 clp
->cl_machine_cred
= cred
;
192 nfs_fscache_get_client_cookie(clp
);
203 #ifdef CONFIG_NFS_V4_1
204 static void nfs4_shutdown_session(struct nfs_client
*clp
)
206 if (nfs4_has_session(clp
))
207 nfs4_destroy_session(clp
->cl_session
);
209 #else /* CONFIG_NFS_V4_1 */
210 static void nfs4_shutdown_session(struct nfs_client
*clp
)
213 #endif /* CONFIG_NFS_V4_1 */
216 * Destroy the NFS4 callback service
218 static void nfs4_destroy_callback(struct nfs_client
*clp
)
220 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
221 nfs_callback_down(clp
->cl_mvops
->minor_version
);
224 static void nfs4_shutdown_client(struct nfs_client
*clp
)
226 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
227 nfs4_kill_renewd(clp
);
228 nfs4_shutdown_session(clp
);
229 nfs4_destroy_callback(clp
);
230 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
231 nfs_idmap_delete(clp
);
233 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
236 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
237 void nfs_cleanup_cb_ident_idr(void)
239 idr_destroy(&cb_ident_idr
);
242 /* nfs_client_lock held */
243 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
245 if (clp
->cl_cb_ident
)
246 idr_remove(&cb_ident_idr
, clp
->cl_cb_ident
);
249 static void pnfs_init_server(struct nfs_server
*server
)
251 rpc_init_wait_queue(&server
->roc_rpcwaitq
, "pNFS ROC");
254 static void nfs4_destroy_server(struct nfs_server
*server
)
256 nfs4_purge_state_owners(server
);
260 static void nfs4_shutdown_client(struct nfs_client
*clp
)
264 void nfs_cleanup_cb_ident_idr(void)
268 static void nfs_cb_idr_remove_locked(struct nfs_client
*clp
)
272 static void pnfs_init_server(struct nfs_server
*server
)
276 #endif /* CONFIG_NFS_V4 */
279 * Destroy a shared client record
281 static void nfs_free_client(struct nfs_client
*clp
)
283 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
285 nfs4_shutdown_client(clp
);
287 nfs_fscache_release_client_cookie(clp
);
289 /* -EIO all pending I/O */
290 if (!IS_ERR(clp
->cl_rpcclient
))
291 rpc_shutdown_client(clp
->cl_rpcclient
);
293 if (clp
->cl_machine_cred
!= NULL
)
294 put_rpccred(clp
->cl_machine_cred
);
296 nfs4_deviceid_purge_client(clp
);
298 kfree(clp
->cl_hostname
);
299 kfree(clp
->server_scope
);
302 dprintk("<-- nfs_free_client()\n");
306 * Release a reference to a shared client record
308 void nfs_put_client(struct nfs_client
*clp
)
313 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
315 if (atomic_dec_and_lock(&clp
->cl_count
, &nfs_client_lock
)) {
316 list_del(&clp
->cl_share_link
);
317 nfs_cb_idr_remove_locked(clp
);
318 spin_unlock(&nfs_client_lock
);
320 BUG_ON(!list_empty(&clp
->cl_superblocks
));
322 nfs_free_client(clp
);
325 EXPORT_SYMBOL_GPL(nfs_put_client
);
327 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
329 * Test if two ip6 socket addresses refer to the same socket by
330 * comparing relevant fields. The padding bytes specifically, are not
331 * compared. sin6_flowinfo is not compared because it only affects QoS
332 * and sin6_scope_id is only compared if the address is "link local"
333 * because "link local" addresses need only be unique to a specific
334 * link. Conversely, ordinary unicast addresses might have different
337 * The caller should ensure both socket addresses are AF_INET6.
339 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
340 const struct sockaddr
*sa2
)
342 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
343 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
345 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
347 else if (ipv6_addr_type(&sin1
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
348 return sin1
->sin6_scope_id
== sin2
->sin6_scope_id
;
352 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
353 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
354 const struct sockaddr
*sa2
)
361 * Test if two ip4 socket addresses refer to the same socket, by
362 * comparing relevant fields. The padding bytes specifically, are
365 * The caller should ensure both socket addresses are AF_INET.
367 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
368 const struct sockaddr
*sa2
)
370 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
371 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
373 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
376 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
377 const struct sockaddr
*sa2
)
379 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
380 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
382 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
383 (sin1
->sin6_port
== sin2
->sin6_port
);
386 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
387 const struct sockaddr
*sa2
)
389 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
390 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
392 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
393 (sin1
->sin_port
== sin2
->sin_port
);
397 * Test if two socket addresses represent the same actual socket,
398 * by comparing (only) relevant fields, excluding the port number.
400 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
401 const struct sockaddr
*sa2
)
403 if (sa1
->sa_family
!= sa2
->sa_family
)
406 switch (sa1
->sa_family
) {
408 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
410 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
416 * Test if two socket addresses represent the same actual socket,
417 * by comparing (only) relevant fields, including the port number.
419 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
420 const struct sockaddr
*sa2
)
422 if (sa1
->sa_family
!= sa2
->sa_family
)
425 switch (sa1
->sa_family
) {
427 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
429 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
434 /* Common match routine for v4.0 and v4.1 callback services */
436 nfs4_cb_match_client(const struct sockaddr
*addr
, struct nfs_client
*clp
,
439 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
441 /* Don't match clients that failed to initialise */
442 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
443 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
446 /* Match the version and minorversion */
447 if (clp
->rpc_ops
->version
!= 4 ||
448 clp
->cl_minorversion
!= minorversion
)
451 /* Match only the IP address, not the port number */
452 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
459 * Find an nfs_client on the list that matches the initialisation data
462 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
464 struct nfs_client
*clp
;
465 const struct sockaddr
*sap
= data
->addr
;
467 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
468 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
469 /* Don't match clients that failed to initialise properly */
470 if (clp
->cl_cons_state
< 0)
473 /* Different NFS versions cannot share the same nfs_client */
474 if (clp
->rpc_ops
!= data
->rpc_ops
)
477 if (clp
->cl_proto
!= data
->proto
)
479 /* Match nfsv4 minorversion */
480 if (clp
->cl_minorversion
!= data
->minorversion
)
482 /* Match the full socket address */
483 if (!nfs_sockaddr_cmp(sap
, clap
))
486 atomic_inc(&clp
->cl_count
);
493 * Look up a client by IP address and protocol version
494 * - creates a new record if one doesn't yet exist
496 static struct nfs_client
*
497 nfs_get_client(const struct nfs_client_initdata
*cl_init
,
498 const struct rpc_timeout
*timeparms
,
500 rpc_authflavor_t authflavour
,
503 struct nfs_client
*clp
, *new = NULL
;
506 dprintk("--> nfs_get_client(%s,v%u)\n",
507 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
509 /* see if the client already exists */
511 spin_lock(&nfs_client_lock
);
513 clp
= nfs_match_client(cl_init
);
519 spin_unlock(&nfs_client_lock
);
521 new = nfs_alloc_client(cl_init
);
522 } while (!IS_ERR(new));
524 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
527 /* install a new client and return with it unready */
530 list_add(&clp
->cl_share_link
, &nfs_client_list
);
531 spin_unlock(&nfs_client_lock
);
533 error
= cl_init
->rpc_ops
->init_client(clp
, timeparms
, ip_addr
,
534 authflavour
, noresvport
);
537 return ERR_PTR(error
);
539 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
542 /* found an existing client
543 * - make sure it's ready before returning
546 spin_unlock(&nfs_client_lock
);
549 nfs_free_client(new);
551 error
= wait_event_killable(nfs_client_active_wq
,
552 clp
->cl_cons_state
< NFS_CS_INITING
);
555 return ERR_PTR(-ERESTARTSYS
);
558 if (clp
->cl_cons_state
< NFS_CS_READY
) {
559 error
= clp
->cl_cons_state
;
561 return ERR_PTR(error
);
564 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
566 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
571 * Mark a server as ready or failed
573 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
575 clp
->cl_cons_state
= state
;
576 wake_up_all(&nfs_client_active_wq
);
580 * With sessions, the client is not marked ready until after a
581 * successful EXCHANGE_ID and CREATE_SESSION.
583 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
584 * other versions of NFS can be tried.
586 int nfs4_check_client_ready(struct nfs_client
*clp
)
588 if (!nfs4_has_session(clp
))
590 if (clp
->cl_cons_state
< NFS_CS_READY
)
591 return -EPROTONOSUPPORT
;
596 * Initialise the timeout values for a connection
598 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
599 unsigned int timeo
, unsigned int retrans
)
601 to
->to_initval
= timeo
* HZ
/ 10;
602 to
->to_retries
= retrans
;
605 case XPRT_TRANSPORT_TCP
:
606 case XPRT_TRANSPORT_RDMA
:
607 if (to
->to_retries
== 0)
608 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
609 if (to
->to_initval
== 0)
610 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
611 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
612 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
613 to
->to_increment
= to
->to_initval
;
614 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
615 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
616 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
617 if (to
->to_maxval
< to
->to_initval
)
618 to
->to_maxval
= to
->to_initval
;
619 to
->to_exponential
= 0;
621 case XPRT_TRANSPORT_UDP
:
622 if (to
->to_retries
== 0)
623 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
625 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
626 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
627 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
628 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
629 to
->to_exponential
= 1;
637 * Create an RPC client handle
639 static int nfs_create_rpc_client(struct nfs_client
*clp
,
640 const struct rpc_timeout
*timeparms
,
641 rpc_authflavor_t flavor
,
642 int discrtry
, int noresvport
)
644 struct rpc_clnt
*clnt
= NULL
;
645 struct rpc_create_args args
= {
647 .protocol
= clp
->cl_proto
,
648 .address
= (struct sockaddr
*)&clp
->cl_addr
,
649 .addrsize
= clp
->cl_addrlen
,
650 .timeout
= timeparms
,
651 .servername
= clp
->cl_hostname
,
652 .program
= &nfs_program
,
653 .version
= clp
->rpc_ops
->version
,
654 .authflavor
= flavor
,
658 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
660 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
662 if (!IS_ERR(clp
->cl_rpcclient
))
665 clnt
= rpc_create(&args
);
667 dprintk("%s: cannot create RPC client. Error = %ld\n",
668 __func__
, PTR_ERR(clnt
));
669 return PTR_ERR(clnt
);
672 clp
->cl_rpcclient
= clnt
;
677 * Version 2 or 3 client destruction
679 static void nfs_destroy_server(struct nfs_server
*server
)
681 if (!(server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) ||
682 !(server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
683 nlmclnt_done(server
->nlm_host
);
687 * Version 2 or 3 lockd setup
689 static int nfs_start_lockd(struct nfs_server
*server
)
691 struct nlm_host
*host
;
692 struct nfs_client
*clp
= server
->nfs_client
;
693 struct nlmclnt_initdata nlm_init
= {
694 .hostname
= clp
->cl_hostname
,
695 .address
= (struct sockaddr
*)&clp
->cl_addr
,
696 .addrlen
= clp
->cl_addrlen
,
697 .nfs_version
= clp
->rpc_ops
->version
,
698 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
702 if (nlm_init
.nfs_version
> 3)
704 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
705 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
708 switch (clp
->cl_proto
) {
710 nlm_init
.protocol
= IPPROTO_TCP
;
712 case XPRT_TRANSPORT_UDP
:
713 nlm_init
.protocol
= IPPROTO_UDP
;
716 host
= nlmclnt_init(&nlm_init
);
718 return PTR_ERR(host
);
720 server
->nlm_host
= host
;
721 server
->destroy
= nfs_destroy_server
;
726 * Initialise an NFSv3 ACL client connection
728 #ifdef CONFIG_NFS_V3_ACL
729 static void nfs_init_server_aclclient(struct nfs_server
*server
)
731 if (server
->nfs_client
->rpc_ops
->version
!= 3)
733 if (server
->flags
& NFS_MOUNT_NOACL
)
736 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
737 if (IS_ERR(server
->client_acl
))
740 /* No errors! Assume that Sun nfsacls are supported */
741 server
->caps
|= NFS_CAP_ACLS
;
745 server
->caps
&= ~NFS_CAP_ACLS
;
748 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
750 server
->flags
&= ~NFS_MOUNT_NOACL
;
751 server
->caps
&= ~NFS_CAP_ACLS
;
756 * Create a general RPC client
758 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
759 const struct rpc_timeout
*timeo
,
760 rpc_authflavor_t pseudoflavour
)
762 struct nfs_client
*clp
= server
->nfs_client
;
764 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
765 if (IS_ERR(server
->client
)) {
766 dprintk("%s: couldn't create rpc_client!\n", __func__
);
767 return PTR_ERR(server
->client
);
770 memcpy(&server
->client
->cl_timeout_default
,
772 sizeof(server
->client
->cl_timeout_default
));
773 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
775 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
776 struct rpc_auth
*auth
;
778 auth
= rpcauth_create(pseudoflavour
, server
->client
);
780 dprintk("%s: couldn't create credcache!\n", __func__
);
781 return PTR_ERR(auth
);
784 server
->client
->cl_softrtry
= 0;
785 if (server
->flags
& NFS_MOUNT_SOFT
)
786 server
->client
->cl_softrtry
= 1;
792 * Initialise an NFS2 or NFS3 client
794 int nfs_init_client(struct nfs_client
*clp
, const struct rpc_timeout
*timeparms
,
795 const char *ip_addr
, rpc_authflavor_t authflavour
,
800 if (clp
->cl_cons_state
== NFS_CS_READY
) {
801 /* the client is already initialised */
802 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
807 * Create a client RPC handle for doing FSSTAT with UNIX auth only
808 * - RFC 2623, sec 2.3.2
810 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
,
814 nfs_mark_client_ready(clp
, NFS_CS_READY
);
818 nfs_mark_client_ready(clp
, error
);
819 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
824 * Create a version 2 or 3 client
826 static int nfs_init_server(struct nfs_server
*server
,
827 const struct nfs_parsed_mount_data
*data
)
829 struct nfs_client_initdata cl_init
= {
830 .hostname
= data
->nfs_server
.hostname
,
831 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
832 .addrlen
= data
->nfs_server
.addrlen
,
833 .rpc_ops
= &nfs_v2_clientops
,
834 .proto
= data
->nfs_server
.protocol
,
836 struct rpc_timeout timeparms
;
837 struct nfs_client
*clp
;
840 dprintk("--> nfs_init_server()\n");
843 if (data
->version
== 3)
844 cl_init
.rpc_ops
= &nfs_v3_clientops
;
847 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
848 data
->timeo
, data
->retrans
);
850 /* Allocate or find a client reference we can use */
851 clp
= nfs_get_client(&cl_init
, &timeparms
, NULL
, RPC_AUTH_UNIX
,
852 data
->flags
& NFS_MOUNT_NORESVPORT
);
854 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
858 server
->nfs_client
= clp
;
860 /* Initialise the client representation from the mount data */
861 server
->flags
= data
->flags
;
862 server
->options
= data
->options
;
863 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
864 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
865 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
;
868 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
870 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
872 server
->acregmin
= data
->acregmin
* HZ
;
873 server
->acregmax
= data
->acregmax
* HZ
;
874 server
->acdirmin
= data
->acdirmin
* HZ
;
875 server
->acdirmax
= data
->acdirmax
* HZ
;
877 /* Start lockd here, before we might error out */
878 error
= nfs_start_lockd(server
);
882 server
->port
= data
->nfs_server
.port
;
884 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
888 /* Preserve the values of mount_server-related mount options */
889 if (data
->mount_server
.addrlen
) {
890 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
891 data
->mount_server
.addrlen
);
892 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
894 server
->mountd_version
= data
->mount_server
.version
;
895 server
->mountd_port
= data
->mount_server
.port
;
896 server
->mountd_protocol
= data
->mount_server
.protocol
;
898 server
->namelen
= data
->namlen
;
899 /* Create a client RPC handle for the NFSv3 ACL management interface */
900 nfs_init_server_aclclient(server
);
901 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
905 server
->nfs_client
= NULL
;
907 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
912 * Load up the server record from information gained in an fsinfo record
914 static void nfs_server_set_fsinfo(struct nfs_server
*server
,
915 struct nfs_fh
*mntfh
,
916 struct nfs_fsinfo
*fsinfo
)
918 unsigned long max_rpc_payload
;
920 /* Work out a lot of parameters */
921 if (server
->rsize
== 0)
922 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
923 if (server
->wsize
== 0)
924 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
926 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
927 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
928 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
929 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
931 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
932 if (server
->rsize
> max_rpc_payload
)
933 server
->rsize
= max_rpc_payload
;
934 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
935 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
936 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
938 server
->backing_dev_info
.name
= "nfs";
939 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
941 if (server
->wsize
> max_rpc_payload
)
942 server
->wsize
= max_rpc_payload
;
943 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
944 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
945 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
946 server
->pnfs_blksize
= fsinfo
->blksize
;
947 set_pnfs_layoutdriver(server
, mntfh
, fsinfo
->layouttype
);
949 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
951 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
952 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
953 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
954 if (server
->dtsize
> server
->rsize
)
955 server
->dtsize
= server
->rsize
;
957 if (server
->flags
& NFS_MOUNT_NOAC
) {
958 server
->acregmin
= server
->acregmax
= 0;
959 server
->acdirmin
= server
->acdirmax
= 0;
962 server
->maxfilesize
= fsinfo
->maxfilesize
;
964 server
->time_delta
= fsinfo
->time_delta
;
966 /* We're airborne Set socket buffersize */
967 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
971 * Probe filesystem information, including the FSID on v2/v3
973 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
975 struct nfs_fsinfo fsinfo
;
976 struct nfs_client
*clp
= server
->nfs_client
;
979 dprintk("--> nfs_probe_fsinfo()\n");
981 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
982 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
987 fsinfo
.fattr
= fattr
;
988 fsinfo
.layouttype
= 0;
989 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
993 nfs_server_set_fsinfo(server
, mntfh
, &fsinfo
);
995 /* Get some general file system info */
996 if (server
->namelen
== 0) {
997 struct nfs_pathconf pathinfo
;
999 pathinfo
.fattr
= fattr
;
1000 nfs_fattr_init(fattr
);
1002 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
1003 server
->namelen
= pathinfo
.max_namelen
;
1006 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1010 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
1015 * Copy useful information when duplicating a server record
1017 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
1019 target
->flags
= source
->flags
;
1020 target
->rsize
= source
->rsize
;
1021 target
->wsize
= source
->wsize
;
1022 target
->acregmin
= source
->acregmin
;
1023 target
->acregmax
= source
->acregmax
;
1024 target
->acdirmin
= source
->acdirmin
;
1025 target
->acdirmax
= source
->acdirmax
;
1026 target
->caps
= source
->caps
;
1027 target
->options
= source
->options
;
1030 static void nfs_server_insert_lists(struct nfs_server
*server
)
1032 struct nfs_client
*clp
= server
->nfs_client
;
1034 spin_lock(&nfs_client_lock
);
1035 list_add_tail_rcu(&server
->client_link
, &clp
->cl_superblocks
);
1036 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1037 clear_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1038 spin_unlock(&nfs_client_lock
);
1042 static void nfs_server_remove_lists(struct nfs_server
*server
)
1044 struct nfs_client
*clp
= server
->nfs_client
;
1046 spin_lock(&nfs_client_lock
);
1047 list_del_rcu(&server
->client_link
);
1048 if (clp
&& list_empty(&clp
->cl_superblocks
))
1049 set_bit(NFS_CS_STOP_RENEW
, &clp
->cl_res_state
);
1050 list_del(&server
->master_link
);
1051 spin_unlock(&nfs_client_lock
);
1057 * Allocate and initialise a server record
1059 static struct nfs_server
*nfs_alloc_server(void)
1061 struct nfs_server
*server
;
1063 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1067 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
1069 /* Zero out the NFS state stuff */
1070 INIT_LIST_HEAD(&server
->client_link
);
1071 INIT_LIST_HEAD(&server
->master_link
);
1072 INIT_LIST_HEAD(&server
->delegations
);
1073 INIT_LIST_HEAD(&server
->layouts
);
1074 INIT_LIST_HEAD(&server
->state_owners_lru
);
1076 atomic_set(&server
->active
, 0);
1078 server
->io_stats
= nfs_alloc_iostats();
1079 if (!server
->io_stats
) {
1084 if (bdi_init(&server
->backing_dev_info
)) {
1085 nfs_free_iostats(server
->io_stats
);
1090 pnfs_init_server(server
);
1096 * Free up a server record
1098 void nfs_free_server(struct nfs_server
*server
)
1100 dprintk("--> nfs_free_server()\n");
1102 nfs_server_remove_lists(server
);
1103 unset_pnfs_layoutdriver(server
);
1105 if (server
->destroy
!= NULL
)
1106 server
->destroy(server
);
1108 if (!IS_ERR(server
->client_acl
))
1109 rpc_shutdown_client(server
->client_acl
);
1110 if (!IS_ERR(server
->client
))
1111 rpc_shutdown_client(server
->client
);
1113 nfs_put_client(server
->nfs_client
);
1115 nfs_free_iostats(server
->io_stats
);
1116 bdi_destroy(&server
->backing_dev_info
);
1118 nfs_release_automount_timer();
1119 dprintk("<-- nfs_free_server()\n");
1123 * Create a version 2 or 3 volume record
1124 * - keyed on server and FSID
1126 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1127 struct nfs_fh
*mntfh
)
1129 struct nfs_server
*server
;
1130 struct nfs_fattr
*fattr
;
1133 server
= nfs_alloc_server();
1135 return ERR_PTR(-ENOMEM
);
1138 fattr
= nfs_alloc_fattr();
1142 /* Get a client representation */
1143 error
= nfs_init_server(server
, data
);
1147 BUG_ON(!server
->nfs_client
);
1148 BUG_ON(!server
->nfs_client
->rpc_ops
);
1149 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1151 /* Probe the root fh to retrieve its FSID */
1152 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1155 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1156 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1157 server
->namelen
= NFS3_MAXNAMLEN
;
1158 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1159 server
->caps
|= NFS_CAP_READDIRPLUS
;
1161 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1162 server
->namelen
= NFS2_MAXNAMLEN
;
1165 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1166 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, fattr
);
1168 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1172 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1174 dprintk("Server FSID: %llx:%llx\n",
1175 (unsigned long long) server
->fsid
.major
,
1176 (unsigned long long) server
->fsid
.minor
);
1178 nfs_server_insert_lists(server
);
1179 server
->mount_time
= jiffies
;
1180 nfs_free_fattr(fattr
);
1184 nfs_free_fattr(fattr
);
1185 nfs_free_server(server
);
1186 return ERR_PTR(error
);
1189 #ifdef CONFIG_NFS_V4
1191 * NFSv4.0 callback thread helper
1193 * Find a client by IP address, protocol version, and minorversion
1195 * Called from the pg_authenticate method. The callback identifier
1196 * is not used as it has not been decoded.
1198 * Returns NULL if no such client
1201 nfs4_find_client_no_ident(const struct sockaddr
*addr
)
1203 struct nfs_client
*clp
;
1205 spin_lock(&nfs_client_lock
);
1206 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
1207 if (nfs4_cb_match_client(addr
, clp
, 0) == false)
1209 atomic_inc(&clp
->cl_count
);
1210 spin_unlock(&nfs_client_lock
);
1213 spin_unlock(&nfs_client_lock
);
1218 * NFSv4.0 callback thread helper
1220 * Find a client by callback identifier
1223 nfs4_find_client_ident(int cb_ident
)
1225 struct nfs_client
*clp
;
1227 spin_lock(&nfs_client_lock
);
1228 clp
= idr_find(&cb_ident_idr
, cb_ident
);
1230 atomic_inc(&clp
->cl_count
);
1231 spin_unlock(&nfs_client_lock
);
1235 #if defined(CONFIG_NFS_V4_1)
1237 * NFSv4.1 callback thread helper
1238 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1239 * minorversion, and sessionID
1241 * Returns NULL if no such client
1244 nfs4_find_client_sessionid(const struct sockaddr
*addr
,
1245 struct nfs4_sessionid
*sid
)
1247 struct nfs_client
*clp
;
1249 spin_lock(&nfs_client_lock
);
1250 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
1251 if (nfs4_cb_match_client(addr
, clp
, 1) == false)
1254 if (!nfs4_has_session(clp
))
1257 /* Match sessionid*/
1258 if (memcmp(clp
->cl_session
->sess_id
.data
,
1259 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
1262 atomic_inc(&clp
->cl_count
);
1263 spin_unlock(&nfs_client_lock
);
1266 spin_unlock(&nfs_client_lock
);
1270 #else /* CONFIG_NFS_V4_1 */
1273 nfs4_find_client_sessionid(const struct sockaddr
*addr
,
1274 struct nfs4_sessionid
*sid
)
1278 #endif /* CONFIG_NFS_V4_1 */
1281 * Initialize the NFS4 callback service
1283 static int nfs4_init_callback(struct nfs_client
*clp
)
1287 if (clp
->rpc_ops
->version
== 4) {
1288 if (nfs4_has_session(clp
)) {
1289 error
= xprt_setup_backchannel(
1290 clp
->cl_rpcclient
->cl_xprt
,
1291 NFS41_BC_MIN_CALLBACKS
);
1296 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
,
1297 clp
->cl_rpcclient
->cl_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
,
1350 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1351 /* the client is initialised already */
1352 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1356 /* Check NFS protocol revision and initialize RPC op vector */
1357 clp
->rpc_ops
= &nfs_v4_clientops
;
1359 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
,
1363 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1365 error
= nfs_idmap_new(clp
);
1367 dprintk("%s: failed to create idmapper. Error = %d\n",
1371 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1373 error
= nfs4_init_client_minor_version(clp
);
1377 if (!nfs4_has_session(clp
))
1378 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1382 nfs_mark_client_ready(clp
, error
);
1383 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1388 * Set up an NFS4 client
1390 static int nfs4_set_client(struct nfs_server
*server
,
1391 const char *hostname
,
1392 const struct sockaddr
*addr
,
1393 const size_t addrlen
,
1394 const char *ip_addr
,
1395 rpc_authflavor_t authflavour
,
1396 int proto
, const struct rpc_timeout
*timeparms
,
1399 struct nfs_client_initdata cl_init
= {
1400 .hostname
= hostname
,
1403 .rpc_ops
= &nfs_v4_clientops
,
1405 .minorversion
= minorversion
,
1407 struct nfs_client
*clp
;
1410 dprintk("--> nfs4_set_client()\n");
1412 /* Allocate or find a client reference we can use */
1413 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
,
1414 server
->flags
& NFS_MOUNT_NORESVPORT
);
1416 error
= PTR_ERR(clp
);
1421 * Query for the lease time on clientid setup or renewal
1423 * Note that this will be set on nfs_clients that were created
1424 * only for the DS role and did not set this bit, but now will
1425 * serve a dual role.
1427 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
1429 server
->nfs_client
= clp
;
1430 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1433 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1438 * Set up a pNFS Data Server client.
1440 * Return any existing nfs_client that matches server address,port,version
1443 * For a new nfs_client, use a soft mount (default), a low retrans and a
1444 * low timeout interval so that if a connection is lost, we retry through
1447 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
1448 const struct sockaddr
*ds_addr
,
1449 int ds_addrlen
, int ds_proto
)
1451 struct nfs_client_initdata cl_init
= {
1453 .addrlen
= ds_addrlen
,
1454 .rpc_ops
= &nfs_v4_clientops
,
1456 .minorversion
= mds_clp
->cl_minorversion
,
1458 struct rpc_timeout ds_timeout
= {
1459 .to_initval
= 15 * HZ
,
1460 .to_maxval
= 15 * HZ
,
1462 .to_exponential
= 1,
1464 struct nfs_client
*clp
;
1467 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1468 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1469 * (section 13.1 RFC 5661).
1471 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
1472 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
, 0);
1474 dprintk("<-- %s %p\n", __func__
, clp
);
1477 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
1480 * Session has been established, and the client marked ready.
1481 * Set the mount rsize and wsize with negotiated fore channel
1482 * attributes which will be bound checked in nfs_server_set_fsinfo.
1484 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1486 #ifdef CONFIG_NFS_V4_1
1487 struct nfs4_session
*sess
;
1491 if (!nfs4_has_session(server
->nfs_client
))
1493 sess
= server
->nfs_client
->cl_session
;
1494 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
1495 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
1497 if (server
->rsize
> server_resp_sz
)
1498 server
->rsize
= server_resp_sz
;
1499 if (server
->wsize
> server_rqst_sz
)
1500 server
->wsize
= server_rqst_sz
;
1501 #endif /* CONFIG_NFS_V4_1 */
1504 static int nfs4_server_common_setup(struct nfs_server
*server
,
1505 struct nfs_fh
*mntfh
)
1507 struct nfs_fattr
*fattr
;
1510 BUG_ON(!server
->nfs_client
);
1511 BUG_ON(!server
->nfs_client
->rpc_ops
);
1512 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1514 /* data servers support only a subset of NFSv4.1 */
1515 if (is_ds_only_client(server
->nfs_client
))
1516 return -EPROTONOSUPPORT
;
1518 fattr
= nfs_alloc_fattr();
1522 /* We must ensure the session is initialised first */
1523 error
= nfs4_init_session(server
);
1527 /* Probe the root fh to retrieve its FSID and filehandle */
1528 error
= nfs4_get_rootfh(server
, mntfh
);
1532 dprintk("Server FSID: %llx:%llx\n",
1533 (unsigned long long) server
->fsid
.major
,
1534 (unsigned long long) server
->fsid
.minor
);
1535 dprintk("Mount FH: %d\n", mntfh
->size
);
1537 nfs4_session_set_rwsize(server
);
1539 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1543 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1544 server
->namelen
= NFS4_MAXNAMLEN
;
1546 nfs_server_insert_lists(server
);
1547 server
->mount_time
= jiffies
;
1548 server
->destroy
= nfs4_destroy_server
;
1550 nfs_free_fattr(fattr
);
1555 * Create a version 4 volume record
1557 static int nfs4_init_server(struct nfs_server
*server
,
1558 const struct nfs_parsed_mount_data
*data
)
1560 struct rpc_timeout timeparms
;
1563 dprintk("--> nfs4_init_server()\n");
1565 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1566 data
->timeo
, data
->retrans
);
1568 /* Initialise the client representation from the mount data */
1569 server
->flags
= data
->flags
;
1570 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
|NFS_CAP_POSIX_LOCK
;
1571 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1572 server
->caps
|= NFS_CAP_READDIRPLUS
;
1573 server
->options
= data
->options
;
1575 /* Get a client record */
1576 error
= nfs4_set_client(server
,
1577 data
->nfs_server
.hostname
,
1578 (const struct sockaddr
*)&data
->nfs_server
.address
,
1579 data
->nfs_server
.addrlen
,
1580 data
->client_address
,
1581 data
->auth_flavors
[0],
1582 data
->nfs_server
.protocol
,
1584 data
->minorversion
);
1589 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1592 if (nfs4_disable_idmapping
&& data
->auth_flavors
[0] == RPC_AUTH_UNIX
)
1593 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
1596 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1598 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1600 server
->acregmin
= data
->acregmin
* HZ
;
1601 server
->acregmax
= data
->acregmax
* HZ
;
1602 server
->acdirmin
= data
->acdirmin
* HZ
;
1603 server
->acdirmax
= data
->acdirmax
* HZ
;
1605 server
->port
= data
->nfs_server
.port
;
1607 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1611 dprintk("<-- nfs4_init_server() = %d\n", error
);
1616 * Create a version 4 volume record
1617 * - keyed on server and FSID
1619 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1620 struct nfs_fh
*mntfh
)
1622 struct nfs_server
*server
;
1625 dprintk("--> nfs4_create_server()\n");
1627 server
= nfs_alloc_server();
1629 return ERR_PTR(-ENOMEM
);
1631 /* set up the general RPC client */
1632 error
= nfs4_init_server(server
, data
);
1636 error
= nfs4_server_common_setup(server
, mntfh
);
1640 dprintk("<-- nfs4_create_server() = %p\n", server
);
1644 nfs_free_server(server
);
1645 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1646 return ERR_PTR(error
);
1650 * Create an NFS4 referral server record
1652 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1653 struct nfs_fh
*mntfh
)
1655 struct nfs_client
*parent_client
;
1656 struct nfs_server
*server
, *parent_server
;
1659 dprintk("--> nfs4_create_referral_server()\n");
1661 server
= nfs_alloc_server();
1663 return ERR_PTR(-ENOMEM
);
1665 parent_server
= NFS_SB(data
->sb
);
1666 parent_client
= parent_server
->nfs_client
;
1668 /* Initialise the client representation from the parent server */
1669 nfs_server_copy_userdata(server
, parent_server
);
1670 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1672 /* Get a client representation.
1673 * Note: NFSv4 always uses TCP, */
1674 error
= nfs4_set_client(server
, data
->hostname
,
1677 parent_client
->cl_ipaddr
,
1679 parent_server
->client
->cl_xprt
->prot
,
1680 parent_server
->client
->cl_timeout
,
1681 parent_client
->cl_mvops
->minor_version
);
1685 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1689 error
= nfs4_server_common_setup(server
, mntfh
);
1693 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1697 nfs_free_server(server
);
1698 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1699 return ERR_PTR(error
);
1702 #endif /* CONFIG_NFS_V4 */
1705 * Clone an NFS2, NFS3 or NFS4 server record
1707 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1709 struct nfs_fattr
*fattr
)
1711 struct nfs_server
*server
;
1712 struct nfs_fattr
*fattr_fsinfo
;
1715 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1716 (unsigned long long) fattr
->fsid
.major
,
1717 (unsigned long long) fattr
->fsid
.minor
);
1719 server
= nfs_alloc_server();
1721 return ERR_PTR(-ENOMEM
);
1724 fattr_fsinfo
= nfs_alloc_fattr();
1725 if (fattr_fsinfo
== NULL
)
1726 goto out_free_server
;
1728 /* Copy data from the source */
1729 server
->nfs_client
= source
->nfs_client
;
1730 server
->destroy
= source
->destroy
;
1731 atomic_inc(&server
->nfs_client
->cl_count
);
1732 nfs_server_copy_userdata(server
, source
);
1734 server
->fsid
= fattr
->fsid
;
1736 error
= nfs_init_server_rpcclient(server
,
1737 source
->client
->cl_timeout
,
1738 source
->client
->cl_auth
->au_flavor
);
1740 goto out_free_server
;
1741 if (!IS_ERR(source
->client_acl
))
1742 nfs_init_server_aclclient(server
);
1744 /* probe the filesystem info for this server filesystem */
1745 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1747 goto out_free_server
;
1749 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1750 server
->namelen
= NFS4_MAXNAMLEN
;
1752 dprintk("Cloned FSID: %llx:%llx\n",
1753 (unsigned long long) server
->fsid
.major
,
1754 (unsigned long long) server
->fsid
.minor
);
1756 error
= nfs_start_lockd(server
);
1758 goto out_free_server
;
1760 nfs_server_insert_lists(server
);
1761 server
->mount_time
= jiffies
;
1763 nfs_free_fattr(fattr_fsinfo
);
1764 dprintk("<-- nfs_clone_server() = %p\n", server
);
1768 nfs_free_fattr(fattr_fsinfo
);
1769 nfs_free_server(server
);
1770 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1771 return ERR_PTR(error
);
1774 #ifdef CONFIG_PROC_FS
1775 static struct proc_dir_entry
*proc_fs_nfs
;
1777 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1778 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1779 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1780 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1781 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1783 static const struct seq_operations nfs_server_list_ops
= {
1784 .start
= nfs_server_list_start
,
1785 .next
= nfs_server_list_next
,
1786 .stop
= nfs_server_list_stop
,
1787 .show
= nfs_server_list_show
,
1790 static const struct file_operations nfs_server_list_fops
= {
1791 .open
= nfs_server_list_open
,
1793 .llseek
= seq_lseek
,
1794 .release
= seq_release
,
1795 .owner
= THIS_MODULE
,
1798 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1799 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1800 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1801 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1802 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1804 static const struct seq_operations nfs_volume_list_ops
= {
1805 .start
= nfs_volume_list_start
,
1806 .next
= nfs_volume_list_next
,
1807 .stop
= nfs_volume_list_stop
,
1808 .show
= nfs_volume_list_show
,
1811 static const struct file_operations nfs_volume_list_fops
= {
1812 .open
= nfs_volume_list_open
,
1814 .llseek
= seq_lseek
,
1815 .release
= seq_release
,
1816 .owner
= THIS_MODULE
,
1820 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1823 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1828 ret
= seq_open(file
, &nfs_server_list_ops
);
1832 m
= file
->private_data
;
1833 m
->private = PDE(inode
)->data
;
1839 * set up the iterator to start reading from the server list and return the first item
1841 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1843 /* lock the list against modification */
1844 spin_lock(&nfs_client_lock
);
1845 return seq_list_start_head(&nfs_client_list
, *_pos
);
1849 * move to next server
1851 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1853 return seq_list_next(v
, &nfs_client_list
, pos
);
1857 * clean up after reading from the transports list
1859 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1861 spin_unlock(&nfs_client_lock
);
1865 * display a header line followed by a load of call lines
1867 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1869 struct nfs_client
*clp
;
1871 /* display header on line 1 */
1872 if (v
== &nfs_client_list
) {
1873 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1877 /* display one transport per line on subsequent lines */
1878 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1880 /* Check if the client is initialized */
1881 if (clp
->cl_cons_state
!= NFS_CS_READY
)
1884 seq_printf(m
, "v%u %s %s %3d %s\n",
1885 clp
->rpc_ops
->version
,
1886 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1887 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1888 atomic_read(&clp
->cl_count
),
1895 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1897 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1902 ret
= seq_open(file
, &nfs_volume_list_ops
);
1906 m
= file
->private_data
;
1907 m
->private = PDE(inode
)->data
;
1913 * set up the iterator to start reading from the volume list and return the first item
1915 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1917 /* lock the list against modification */
1918 spin_lock(&nfs_client_lock
);
1919 return seq_list_start_head(&nfs_volume_list
, *_pos
);
1923 * move to next volume
1925 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1927 return seq_list_next(v
, &nfs_volume_list
, pos
);
1931 * clean up after reading from the transports list
1933 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1935 spin_unlock(&nfs_client_lock
);
1939 * display a header line followed by a load of call lines
1941 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1943 struct nfs_server
*server
;
1944 struct nfs_client
*clp
;
1945 char dev
[8], fsid
[17];
1947 /* display header on line 1 */
1948 if (v
== &nfs_volume_list
) {
1949 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1952 /* display one transport per line on subsequent lines */
1953 server
= list_entry(v
, struct nfs_server
, master_link
);
1954 clp
= server
->nfs_client
;
1956 snprintf(dev
, 8, "%u:%u",
1957 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1959 snprintf(fsid
, 17, "%llx:%llx",
1960 (unsigned long long) server
->fsid
.major
,
1961 (unsigned long long) server
->fsid
.minor
);
1963 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1964 clp
->rpc_ops
->version
,
1965 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1966 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1969 nfs_server_fscache_state(server
));
1975 * initialise the /proc/fs/nfsfs/ directory
1977 int __init
nfs_fs_proc_init(void)
1979 struct proc_dir_entry
*p
;
1981 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1985 /* a file of servers with which we're dealing */
1986 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1987 proc_fs_nfs
, &nfs_server_list_fops
);
1991 /* a file of volumes that we have mounted */
1992 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1993 proc_fs_nfs
, &nfs_volume_list_fops
);
1999 remove_proc_entry("servers", proc_fs_nfs
);
2001 remove_proc_entry("fs/nfsfs", NULL
);
2007 * clean up the /proc/fs/nfsfs/ directory
2009 void nfs_fs_proc_exit(void)
2011 remove_proc_entry("volumes", proc_fs_nfs
);
2012 remove_proc_entry("servers", proc_fs_nfs
);
2013 remove_proc_entry("fs/nfsfs", NULL
);
2016 #endif /* CONFIG_PROC_FS */
2018 module_param(nfs4_disable_idmapping
, bool, 0644);
2019 MODULE_PARM_DESC(nfs4_disable_idmapping
,
2020 "Turn off NFSv4 idmapping when using 'sec=sys'");