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
);
63 static struct rpc_version
*nfs_version
[5] = {
73 struct rpc_program nfs_program
= {
75 .number
= NFS_PROGRAM
,
76 .nrvers
= ARRAY_SIZE(nfs_version
),
77 .version
= nfs_version
,
78 .stats
= &nfs_rpcstat
,
79 .pipe_dir_name
= "/nfs",
82 struct rpc_stat nfs_rpcstat
= {
83 .program
= &nfs_program
87 #ifdef CONFIG_NFS_V3_ACL
88 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
89 static struct rpc_version
* nfsacl_version
[] = {
90 [3] = &nfsacl_version3
,
93 struct rpc_program nfsacl_program
= {
95 .number
= NFS_ACL_PROGRAM
,
96 .nrvers
= ARRAY_SIZE(nfsacl_version
),
97 .version
= nfsacl_version
,
98 .stats
= &nfsacl_rpcstat
,
100 #endif /* CONFIG_NFS_V3_ACL */
102 struct nfs_client_initdata
{
103 const char *hostname
;
104 const struct sockaddr
*addr
;
106 const struct nfs_rpc_ops
*rpc_ops
;
112 * Allocate a shared client record
114 * Since these are allocated/deallocated very rarely, we don't
115 * bother putting them in a slab cache...
117 static struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
119 struct nfs_client
*clp
;
120 struct rpc_cred
*cred
;
123 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
126 clp
->rpc_ops
= cl_init
->rpc_ops
;
128 atomic_set(&clp
->cl_count
, 1);
129 clp
->cl_cons_state
= NFS_CS_INITING
;
131 memcpy(&clp
->cl_addr
, cl_init
->addr
, cl_init
->addrlen
);
132 clp
->cl_addrlen
= cl_init
->addrlen
;
134 if (cl_init
->hostname
) {
136 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
137 if (!clp
->cl_hostname
)
141 INIT_LIST_HEAD(&clp
->cl_superblocks
);
142 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
144 clp
->cl_proto
= cl_init
->proto
;
147 INIT_LIST_HEAD(&clp
->cl_delegations
);
148 spin_lock_init(&clp
->cl_lock
);
149 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
150 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
151 clp
->cl_boot_time
= CURRENT_TIME
;
152 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
153 clp
->cl_minorversion
= cl_init
->minorversion
;
154 clp
->cl_mvops
= nfs_v4_minor_ops
[cl_init
->minorversion
];
156 cred
= rpc_lookup_machine_cred();
158 clp
->cl_machine_cred
= cred
;
160 nfs_fscache_get_client_cookie(clp
);
172 * Clears/puts all minor version specific parts from an nfs_client struct
173 * reverting it to minorversion 0.
175 static void nfs4_clear_client_minor_version(struct nfs_client
*clp
)
177 #ifdef CONFIG_NFS_V4_1
178 if (nfs4_has_session(clp
)) {
179 nfs4_destroy_session(clp
->cl_session
);
180 clp
->cl_session
= NULL
;
183 clp
->cl_mvops
= nfs_v4_minor_ops
[0];
184 #endif /* CONFIG_NFS_V4_1 */
188 * Destroy the NFS4 callback service
190 static void nfs4_destroy_callback(struct nfs_client
*clp
)
192 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
193 nfs_callback_down(clp
->cl_mvops
->minor_version
);
196 static void nfs4_shutdown_client(struct nfs_client
*clp
)
198 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
199 nfs4_kill_renewd(clp
);
200 nfs4_clear_client_minor_version(clp
);
201 nfs4_destroy_callback(clp
);
202 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
203 nfs_idmap_delete(clp
);
205 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
208 static void nfs4_shutdown_client(struct nfs_client
*clp
)
211 #endif /* CONFIG_NFS_V4 */
214 * Destroy a shared client record
216 static void nfs_free_client(struct nfs_client
*clp
)
218 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
220 nfs4_shutdown_client(clp
);
222 nfs_fscache_release_client_cookie(clp
);
224 /* -EIO all pending I/O */
225 if (!IS_ERR(clp
->cl_rpcclient
))
226 rpc_shutdown_client(clp
->cl_rpcclient
);
228 if (clp
->cl_machine_cred
!= NULL
)
229 put_rpccred(clp
->cl_machine_cred
);
231 kfree(clp
->cl_hostname
);
234 dprintk("<-- nfs_free_client()\n");
238 * Release a reference to a shared client record
240 void nfs_put_client(struct nfs_client
*clp
)
245 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
247 if (atomic_dec_and_lock(&clp
->cl_count
, &nfs_client_lock
)) {
248 list_del(&clp
->cl_share_link
);
249 spin_unlock(&nfs_client_lock
);
251 BUG_ON(!list_empty(&clp
->cl_superblocks
));
253 nfs_free_client(clp
);
257 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
259 * Test if two ip6 socket addresses refer to the same socket by
260 * comparing relevant fields. The padding bytes specifically, are not
261 * compared. sin6_flowinfo is not compared because it only affects QoS
262 * and sin6_scope_id is only compared if the address is "link local"
263 * because "link local" addresses need only be unique to a specific
264 * link. Conversely, ordinary unicast addresses might have different
267 * The caller should ensure both socket addresses are AF_INET6.
269 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
270 const struct sockaddr
*sa2
)
272 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
273 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
275 if (ipv6_addr_scope(&sin1
->sin6_addr
) == IPV6_ADDR_SCOPE_LINKLOCAL
&&
276 sin1
->sin6_scope_id
!= sin2
->sin6_scope_id
)
279 return ipv6_addr_equal(&sin1
->sin6_addr
, &sin1
->sin6_addr
);
281 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
282 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
283 const struct sockaddr
*sa2
)
290 * Test if two ip4 socket addresses refer to the same socket, by
291 * comparing relevant fields. The padding bytes specifically, are
294 * The caller should ensure both socket addresses are AF_INET.
296 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
297 const struct sockaddr
*sa2
)
299 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
300 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
302 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
305 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
306 const struct sockaddr
*sa2
)
308 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
309 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
311 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
312 (sin1
->sin6_port
== sin2
->sin6_port
);
315 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
316 const struct sockaddr
*sa2
)
318 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
319 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
321 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
322 (sin1
->sin_port
== sin2
->sin_port
);
326 * Test if two socket addresses represent the same actual socket,
327 * by comparing (only) relevant fields, excluding the port number.
329 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
330 const struct sockaddr
*sa2
)
332 if (sa1
->sa_family
!= sa2
->sa_family
)
335 switch (sa1
->sa_family
) {
337 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
339 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
345 * Test if two socket addresses represent the same actual socket,
346 * by comparing (only) relevant fields, including the port number.
348 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
349 const struct sockaddr
*sa2
)
351 if (sa1
->sa_family
!= sa2
->sa_family
)
354 switch (sa1
->sa_family
) {
356 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
358 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
364 * Find a client by IP address and protocol version
365 * - returns NULL if no such client
367 struct nfs_client
*nfs_find_client(const struct sockaddr
*addr
, u32 nfsversion
)
369 struct nfs_client
*clp
;
371 spin_lock(&nfs_client_lock
);
372 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
373 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
375 /* Don't match clients that failed to initialise properly */
376 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
377 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
380 /* Different NFS versions cannot share the same nfs_client */
381 if (clp
->rpc_ops
->version
!= nfsversion
)
384 /* Match only the IP address, not the port number */
385 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
388 atomic_inc(&clp
->cl_count
);
389 spin_unlock(&nfs_client_lock
);
392 spin_unlock(&nfs_client_lock
);
397 * Find a client by IP address and protocol version
398 * - returns NULL if no such client
400 struct nfs_client
*nfs_find_client_next(struct nfs_client
*clp
)
402 struct sockaddr
*sap
= (struct sockaddr
*)&clp
->cl_addr
;
403 u32 nfsvers
= clp
->rpc_ops
->version
;
405 spin_lock(&nfs_client_lock
);
406 list_for_each_entry_continue(clp
, &nfs_client_list
, cl_share_link
) {
407 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
409 /* Don't match clients that failed to initialise properly */
410 if (clp
->cl_cons_state
!= NFS_CS_READY
)
413 /* Different NFS versions cannot share the same nfs_client */
414 if (clp
->rpc_ops
->version
!= nfsvers
)
417 /* Match only the IP address, not the port number */
418 if (!nfs_sockaddr_match_ipaddr(sap
, clap
))
421 atomic_inc(&clp
->cl_count
);
422 spin_unlock(&nfs_client_lock
);
425 spin_unlock(&nfs_client_lock
);
430 * Find an nfs_client on the list that matches the initialisation data
433 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
435 struct nfs_client
*clp
;
436 const struct sockaddr
*sap
= data
->addr
;
438 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
439 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
440 /* Don't match clients that failed to initialise properly */
441 if (clp
->cl_cons_state
< 0)
444 /* Different NFS versions cannot share the same nfs_client */
445 if (clp
->rpc_ops
!= data
->rpc_ops
)
448 if (clp
->cl_proto
!= data
->proto
)
450 /* Match nfsv4 minorversion */
451 if (clp
->cl_minorversion
!= data
->minorversion
)
453 /* Match the full socket address */
454 if (!nfs_sockaddr_cmp(sap
, clap
))
457 atomic_inc(&clp
->cl_count
);
464 * Look up a client by IP address and protocol version
465 * - creates a new record if one doesn't yet exist
467 static struct nfs_client
*nfs_get_client(const struct nfs_client_initdata
*cl_init
)
469 struct nfs_client
*clp
, *new = NULL
;
472 dprintk("--> nfs_get_client(%s,v%u)\n",
473 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
475 /* see if the client already exists */
477 spin_lock(&nfs_client_lock
);
479 clp
= nfs_match_client(cl_init
);
485 spin_unlock(&nfs_client_lock
);
487 new = nfs_alloc_client(cl_init
);
488 } while (!IS_ERR(new));
490 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
493 /* install a new client and return with it unready */
496 list_add(&clp
->cl_share_link
, &nfs_client_list
);
497 spin_unlock(&nfs_client_lock
);
498 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
501 /* found an existing client
502 * - make sure it's ready before returning
505 spin_unlock(&nfs_client_lock
);
508 nfs_free_client(new);
510 error
= wait_event_killable(nfs_client_active_wq
,
511 clp
->cl_cons_state
< NFS_CS_INITING
);
514 return ERR_PTR(-ERESTARTSYS
);
517 if (clp
->cl_cons_state
< NFS_CS_READY
) {
518 error
= clp
->cl_cons_state
;
520 return ERR_PTR(error
);
523 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
525 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
530 * Mark a server as ready or failed
532 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
534 clp
->cl_cons_state
= state
;
535 wake_up_all(&nfs_client_active_wq
);
539 * With sessions, the client is not marked ready until after a
540 * successful EXCHANGE_ID and CREATE_SESSION.
542 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
543 * other versions of NFS can be tried.
545 int nfs4_check_client_ready(struct nfs_client
*clp
)
547 if (!nfs4_has_session(clp
))
549 if (clp
->cl_cons_state
< NFS_CS_READY
)
550 return -EPROTONOSUPPORT
;
555 * Initialise the timeout values for a connection
557 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
558 unsigned int timeo
, unsigned int retrans
)
560 to
->to_initval
= timeo
* HZ
/ 10;
561 to
->to_retries
= retrans
;
564 case XPRT_TRANSPORT_TCP
:
565 case XPRT_TRANSPORT_RDMA
:
566 if (to
->to_retries
== 0)
567 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
568 if (to
->to_initval
== 0)
569 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
570 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
571 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
572 to
->to_increment
= to
->to_initval
;
573 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
574 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
575 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
576 if (to
->to_maxval
< to
->to_initval
)
577 to
->to_maxval
= to
->to_initval
;
578 to
->to_exponential
= 0;
580 case XPRT_TRANSPORT_UDP
:
581 if (to
->to_retries
== 0)
582 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
584 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
585 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
586 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
587 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
588 to
->to_exponential
= 1;
596 * Create an RPC client handle
598 static int nfs_create_rpc_client(struct nfs_client
*clp
,
599 const struct rpc_timeout
*timeparms
,
600 rpc_authflavor_t flavor
,
601 int discrtry
, int noresvport
)
603 struct rpc_clnt
*clnt
= NULL
;
604 struct rpc_create_args args
= {
605 .protocol
= clp
->cl_proto
,
606 .address
= (struct sockaddr
*)&clp
->cl_addr
,
607 .addrsize
= clp
->cl_addrlen
,
608 .timeout
= timeparms
,
609 .servername
= clp
->cl_hostname
,
610 .program
= &nfs_program
,
611 .version
= clp
->rpc_ops
->version
,
612 .authflavor
= flavor
,
616 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
618 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
620 if (!IS_ERR(clp
->cl_rpcclient
))
623 clnt
= rpc_create(&args
);
625 dprintk("%s: cannot create RPC client. Error = %ld\n",
626 __func__
, PTR_ERR(clnt
));
627 return PTR_ERR(clnt
);
630 clp
->cl_rpcclient
= clnt
;
635 * Version 2 or 3 client destruction
637 static void nfs_destroy_server(struct nfs_server
*server
)
639 if (!(server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) ||
640 !(server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
641 nlmclnt_done(server
->nlm_host
);
645 * Version 2 or 3 lockd setup
647 static int nfs_start_lockd(struct nfs_server
*server
)
649 struct nlm_host
*host
;
650 struct nfs_client
*clp
= server
->nfs_client
;
651 struct nlmclnt_initdata nlm_init
= {
652 .hostname
= clp
->cl_hostname
,
653 .address
= (struct sockaddr
*)&clp
->cl_addr
,
654 .addrlen
= clp
->cl_addrlen
,
655 .nfs_version
= clp
->rpc_ops
->version
,
656 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
660 if (nlm_init
.nfs_version
> 3)
662 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
663 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
666 switch (clp
->cl_proto
) {
668 nlm_init
.protocol
= IPPROTO_TCP
;
670 case XPRT_TRANSPORT_UDP
:
671 nlm_init
.protocol
= IPPROTO_UDP
;
674 host
= nlmclnt_init(&nlm_init
);
676 return PTR_ERR(host
);
678 server
->nlm_host
= host
;
679 server
->destroy
= nfs_destroy_server
;
684 * Initialise an NFSv3 ACL client connection
686 #ifdef CONFIG_NFS_V3_ACL
687 static void nfs_init_server_aclclient(struct nfs_server
*server
)
689 if (server
->nfs_client
->rpc_ops
->version
!= 3)
691 if (server
->flags
& NFS_MOUNT_NOACL
)
694 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
695 if (IS_ERR(server
->client_acl
))
698 /* No errors! Assume that Sun nfsacls are supported */
699 server
->caps
|= NFS_CAP_ACLS
;
703 server
->caps
&= ~NFS_CAP_ACLS
;
706 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
708 server
->flags
&= ~NFS_MOUNT_NOACL
;
709 server
->caps
&= ~NFS_CAP_ACLS
;
714 * Create a general RPC client
716 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
717 const struct rpc_timeout
*timeo
,
718 rpc_authflavor_t pseudoflavour
)
720 struct nfs_client
*clp
= server
->nfs_client
;
722 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
723 if (IS_ERR(server
->client
)) {
724 dprintk("%s: couldn't create rpc_client!\n", __func__
);
725 return PTR_ERR(server
->client
);
728 memcpy(&server
->client
->cl_timeout_default
,
730 sizeof(server
->client
->cl_timeout_default
));
731 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
733 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
734 struct rpc_auth
*auth
;
736 auth
= rpcauth_create(pseudoflavour
, server
->client
);
738 dprintk("%s: couldn't create credcache!\n", __func__
);
739 return PTR_ERR(auth
);
742 server
->client
->cl_softrtry
= 0;
743 if (server
->flags
& NFS_MOUNT_SOFT
)
744 server
->client
->cl_softrtry
= 1;
750 * Initialise an NFS2 or NFS3 client
752 static int nfs_init_client(struct nfs_client
*clp
,
753 const struct rpc_timeout
*timeparms
,
754 const struct nfs_parsed_mount_data
*data
)
758 if (clp
->cl_cons_state
== NFS_CS_READY
) {
759 /* the client is already initialised */
760 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
765 * Create a client RPC handle for doing FSSTAT with UNIX auth only
766 * - RFC 2623, sec 2.3.2
768 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
,
769 0, data
->flags
& NFS_MOUNT_NORESVPORT
);
772 nfs_mark_client_ready(clp
, NFS_CS_READY
);
776 nfs_mark_client_ready(clp
, error
);
777 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
782 * Create a version 2 or 3 client
784 static int nfs_init_server(struct nfs_server
*server
,
785 const struct nfs_parsed_mount_data
*data
)
787 struct nfs_client_initdata cl_init
= {
788 .hostname
= data
->nfs_server
.hostname
,
789 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
790 .addrlen
= data
->nfs_server
.addrlen
,
791 .rpc_ops
= &nfs_v2_clientops
,
792 .proto
= data
->nfs_server
.protocol
,
794 struct rpc_timeout timeparms
;
795 struct nfs_client
*clp
;
798 dprintk("--> nfs_init_server()\n");
801 if (data
->version
== 3)
802 cl_init
.rpc_ops
= &nfs_v3_clientops
;
805 /* Allocate or find a client reference we can use */
806 clp
= nfs_get_client(&cl_init
);
808 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
812 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
813 data
->timeo
, data
->retrans
);
814 error
= nfs_init_client(clp
, &timeparms
, data
);
818 server
->nfs_client
= clp
;
820 /* Initialise the client representation from the mount data */
821 server
->flags
= data
->flags
;
822 server
->options
= data
->options
;
823 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
824 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
825 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
;
828 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
830 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
832 server
->acregmin
= data
->acregmin
* HZ
;
833 server
->acregmax
= data
->acregmax
* HZ
;
834 server
->acdirmin
= data
->acdirmin
* HZ
;
835 server
->acdirmax
= data
->acdirmax
* HZ
;
837 /* Start lockd here, before we might error out */
838 error
= nfs_start_lockd(server
);
842 server
->port
= data
->nfs_server
.port
;
844 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
848 /* Preserve the values of mount_server-related mount options */
849 if (data
->mount_server
.addrlen
) {
850 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
851 data
->mount_server
.addrlen
);
852 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
854 server
->mountd_version
= data
->mount_server
.version
;
855 server
->mountd_port
= data
->mount_server
.port
;
856 server
->mountd_protocol
= data
->mount_server
.protocol
;
858 server
->namelen
= data
->namlen
;
859 /* Create a client RPC handle for the NFSv3 ACL management interface */
860 nfs_init_server_aclclient(server
);
861 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
865 server
->nfs_client
= NULL
;
867 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
872 * Load up the server record from information gained in an fsinfo record
874 static void nfs_server_set_fsinfo(struct nfs_server
*server
, struct nfs_fsinfo
*fsinfo
)
876 unsigned long max_rpc_payload
;
878 /* Work out a lot of parameters */
879 if (server
->rsize
== 0)
880 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
881 if (server
->wsize
== 0)
882 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
884 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
885 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
886 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
887 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
889 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
890 if (server
->rsize
> max_rpc_payload
)
891 server
->rsize
= max_rpc_payload
;
892 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
893 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
894 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
896 server
->backing_dev_info
.name
= "nfs";
897 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
899 if (server
->wsize
> max_rpc_payload
)
900 server
->wsize
= max_rpc_payload
;
901 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
902 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
903 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
904 set_pnfs_layoutdriver(server
, fsinfo
->layouttype
);
906 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
908 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
909 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
910 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
911 if (server
->dtsize
> server
->rsize
)
912 server
->dtsize
= server
->rsize
;
914 if (server
->flags
& NFS_MOUNT_NOAC
) {
915 server
->acregmin
= server
->acregmax
= 0;
916 server
->acdirmin
= server
->acdirmax
= 0;
919 server
->maxfilesize
= fsinfo
->maxfilesize
;
921 server
->time_delta
= fsinfo
->time_delta
;
923 /* We're airborne Set socket buffersize */
924 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
928 * Probe filesystem information, including the FSID on v2/v3
930 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
932 struct nfs_fsinfo fsinfo
;
933 struct nfs_client
*clp
= server
->nfs_client
;
936 dprintk("--> nfs_probe_fsinfo()\n");
938 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
939 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
944 fsinfo
.fattr
= fattr
;
945 fsinfo
.layouttype
= 0;
946 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
950 nfs_server_set_fsinfo(server
, &fsinfo
);
952 /* Get some general file system info */
953 if (server
->namelen
== 0) {
954 struct nfs_pathconf pathinfo
;
956 pathinfo
.fattr
= fattr
;
957 nfs_fattr_init(fattr
);
959 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
960 server
->namelen
= pathinfo
.max_namelen
;
963 dprintk("<-- nfs_probe_fsinfo() = 0\n");
967 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
972 * Copy useful information when duplicating a server record
974 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
976 target
->flags
= source
->flags
;
977 target
->rsize
= source
->rsize
;
978 target
->wsize
= source
->wsize
;
979 target
->acregmin
= source
->acregmin
;
980 target
->acregmax
= source
->acregmax
;
981 target
->acdirmin
= source
->acdirmin
;
982 target
->acdirmax
= source
->acdirmax
;
983 target
->caps
= source
->caps
;
984 target
->options
= source
->options
;
988 * Allocate and initialise a server record
990 static struct nfs_server
*nfs_alloc_server(void)
992 struct nfs_server
*server
;
994 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
998 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
1000 /* Zero out the NFS state stuff */
1001 INIT_LIST_HEAD(&server
->client_link
);
1002 INIT_LIST_HEAD(&server
->master_link
);
1004 atomic_set(&server
->active
, 0);
1006 server
->io_stats
= nfs_alloc_iostats();
1007 if (!server
->io_stats
) {
1012 if (bdi_init(&server
->backing_dev_info
)) {
1013 nfs_free_iostats(server
->io_stats
);
1022 * Free up a server record
1024 void nfs_free_server(struct nfs_server
*server
)
1026 dprintk("--> nfs_free_server()\n");
1028 unset_pnfs_layoutdriver(server
);
1029 spin_lock(&nfs_client_lock
);
1030 list_del(&server
->client_link
);
1031 list_del(&server
->master_link
);
1032 spin_unlock(&nfs_client_lock
);
1034 if (server
->destroy
!= NULL
)
1035 server
->destroy(server
);
1037 if (!IS_ERR(server
->client_acl
))
1038 rpc_shutdown_client(server
->client_acl
);
1039 if (!IS_ERR(server
->client
))
1040 rpc_shutdown_client(server
->client
);
1042 nfs_put_client(server
->nfs_client
);
1044 nfs_free_iostats(server
->io_stats
);
1045 bdi_destroy(&server
->backing_dev_info
);
1047 nfs_release_automount_timer();
1048 dprintk("<-- nfs_free_server()\n");
1052 * Create a version 2 or 3 volume record
1053 * - keyed on server and FSID
1055 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1056 struct nfs_fh
*mntfh
)
1058 struct nfs_server
*server
;
1059 struct nfs_fattr
*fattr
;
1062 server
= nfs_alloc_server();
1064 return ERR_PTR(-ENOMEM
);
1067 fattr
= nfs_alloc_fattr();
1071 /* Get a client representation */
1072 error
= nfs_init_server(server
, data
);
1076 BUG_ON(!server
->nfs_client
);
1077 BUG_ON(!server
->nfs_client
->rpc_ops
);
1078 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1080 /* Probe the root fh to retrieve its FSID */
1081 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1084 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1085 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1086 server
->namelen
= NFS3_MAXNAMLEN
;
1087 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1088 server
->caps
|= NFS_CAP_READDIRPLUS
;
1090 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1091 server
->namelen
= NFS2_MAXNAMLEN
;
1094 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1095 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, fattr
);
1097 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1101 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1103 dprintk("Server FSID: %llx:%llx\n",
1104 (unsigned long long) server
->fsid
.major
,
1105 (unsigned long long) server
->fsid
.minor
);
1107 spin_lock(&nfs_client_lock
);
1108 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1109 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1110 spin_unlock(&nfs_client_lock
);
1112 server
->mount_time
= jiffies
;
1113 nfs_free_fattr(fattr
);
1117 nfs_free_fattr(fattr
);
1118 nfs_free_server(server
);
1119 return ERR_PTR(error
);
1122 #ifdef CONFIG_NFS_V4
1124 * Initialize the NFS4 callback service
1126 static int nfs4_init_callback(struct nfs_client
*clp
)
1130 if (clp
->rpc_ops
->version
== 4) {
1131 if (nfs4_has_session(clp
)) {
1132 error
= xprt_setup_backchannel(
1133 clp
->cl_rpcclient
->cl_xprt
,
1134 NFS41_BC_MIN_CALLBACKS
);
1139 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
,
1140 clp
->cl_rpcclient
->cl_xprt
);
1142 dprintk("%s: failed to start callback. Error = %d\n",
1146 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
1152 * Initialize the minor version specific parts of an NFS4 client record
1154 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
1156 #if defined(CONFIG_NFS_V4_1)
1157 if (clp
->cl_mvops
->minor_version
) {
1158 struct nfs4_session
*session
= NULL
;
1160 * Create the session and mark it expired.
1161 * When a SEQUENCE operation encounters the expired session
1162 * it will do session recovery to initialize it.
1164 session
= nfs4_alloc_session(clp
);
1168 clp
->cl_session
= session
;
1170 * The create session reply races with the server back
1171 * channel probe. Mark the client NFS_CS_SESSION_INITING
1172 * so that the client back channel can find the
1175 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
1177 #endif /* CONFIG_NFS_V4_1 */
1179 return nfs4_init_callback(clp
);
1183 * Initialise an NFS4 client record
1185 static int nfs4_init_client(struct nfs_client
*clp
,
1186 const struct rpc_timeout
*timeparms
,
1187 const char *ip_addr
,
1188 rpc_authflavor_t authflavour
,
1193 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1194 /* the client is initialised already */
1195 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1199 /* Check NFS protocol revision and initialize RPC op vector */
1200 clp
->rpc_ops
= &nfs_v4_clientops
;
1202 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
,
1203 1, flags
& NFS_MOUNT_NORESVPORT
);
1206 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1208 error
= nfs_idmap_new(clp
);
1210 dprintk("%s: failed to create idmapper. Error = %d\n",
1214 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1216 error
= nfs4_init_client_minor_version(clp
);
1220 if (!nfs4_has_session(clp
))
1221 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1225 nfs_mark_client_ready(clp
, error
);
1226 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1231 * Set up an NFS4 client
1233 static int nfs4_set_client(struct nfs_server
*server
,
1234 const char *hostname
,
1235 const struct sockaddr
*addr
,
1236 const size_t addrlen
,
1237 const char *ip_addr
,
1238 rpc_authflavor_t authflavour
,
1239 int proto
, const struct rpc_timeout
*timeparms
,
1242 struct nfs_client_initdata cl_init
= {
1243 .hostname
= hostname
,
1246 .rpc_ops
= &nfs_v4_clientops
,
1248 .minorversion
= minorversion
,
1250 struct nfs_client
*clp
;
1253 dprintk("--> nfs4_set_client()\n");
1255 /* Allocate or find a client reference we can use */
1256 clp
= nfs_get_client(&cl_init
);
1258 error
= PTR_ERR(clp
);
1261 error
= nfs4_init_client(clp
, timeparms
, ip_addr
, authflavour
,
1266 server
->nfs_client
= clp
;
1267 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1271 nfs_put_client(clp
);
1273 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1279 * Session has been established, and the client marked ready.
1280 * Set the mount rsize and wsize with negotiated fore channel
1281 * attributes which will be bound checked in nfs_server_set_fsinfo.
1283 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1285 #ifdef CONFIG_NFS_V4_1
1286 struct nfs4_session
*sess
;
1290 if (!nfs4_has_session(server
->nfs_client
))
1292 sess
= server
->nfs_client
->cl_session
;
1293 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
1294 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
1296 if (server
->rsize
> server_resp_sz
)
1297 server
->rsize
= server_resp_sz
;
1298 if (server
->wsize
> server_rqst_sz
)
1299 server
->wsize
= server_rqst_sz
;
1300 #endif /* CONFIG_NFS_V4_1 */
1303 static int nfs4_server_common_setup(struct nfs_server
*server
,
1304 struct nfs_fh
*mntfh
)
1306 struct nfs_fattr
*fattr
;
1309 BUG_ON(!server
->nfs_client
);
1310 BUG_ON(!server
->nfs_client
->rpc_ops
);
1311 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1313 fattr
= nfs_alloc_fattr();
1317 /* We must ensure the session is initialised first */
1318 error
= nfs4_init_session(server
);
1322 /* Probe the root fh to retrieve its FSID and filehandle */
1323 error
= nfs4_get_rootfh(server
, mntfh
);
1327 dprintk("Server FSID: %llx:%llx\n",
1328 (unsigned long long) server
->fsid
.major
,
1329 (unsigned long long) server
->fsid
.minor
);
1330 dprintk("Mount FH: %d\n", mntfh
->size
);
1332 nfs4_session_set_rwsize(server
);
1334 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1338 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1339 server
->namelen
= NFS4_MAXNAMLEN
;
1341 spin_lock(&nfs_client_lock
);
1342 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1343 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1344 spin_unlock(&nfs_client_lock
);
1346 server
->mount_time
= jiffies
;
1348 nfs_free_fattr(fattr
);
1353 * Create a version 4 volume record
1355 static int nfs4_init_server(struct nfs_server
*server
,
1356 const struct nfs_parsed_mount_data
*data
)
1358 struct rpc_timeout timeparms
;
1361 dprintk("--> nfs4_init_server()\n");
1363 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1364 data
->timeo
, data
->retrans
);
1366 /* Initialise the client representation from the mount data */
1367 server
->flags
= data
->flags
;
1368 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
|NFS_CAP_POSIX_LOCK
;
1369 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1370 server
->caps
|= NFS_CAP_READDIRPLUS
;
1371 server
->options
= data
->options
;
1373 /* Get a client record */
1374 error
= nfs4_set_client(server
,
1375 data
->nfs_server
.hostname
,
1376 (const struct sockaddr
*)&data
->nfs_server
.address
,
1377 data
->nfs_server
.addrlen
,
1378 data
->client_address
,
1379 data
->auth_flavors
[0],
1380 data
->nfs_server
.protocol
,
1382 data
->minorversion
);
1387 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1389 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1391 server
->acregmin
= data
->acregmin
* HZ
;
1392 server
->acregmax
= data
->acregmax
* HZ
;
1393 server
->acdirmin
= data
->acdirmin
* HZ
;
1394 server
->acdirmax
= data
->acdirmax
* HZ
;
1396 server
->port
= data
->nfs_server
.port
;
1398 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1402 dprintk("<-- nfs4_init_server() = %d\n", error
);
1407 * Create a version 4 volume record
1408 * - keyed on server and FSID
1410 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1411 struct nfs_fh
*mntfh
)
1413 struct nfs_server
*server
;
1416 dprintk("--> nfs4_create_server()\n");
1418 server
= nfs_alloc_server();
1420 return ERR_PTR(-ENOMEM
);
1422 /* set up the general RPC client */
1423 error
= nfs4_init_server(server
, data
);
1427 error
= nfs4_server_common_setup(server
, mntfh
);
1431 dprintk("<-- nfs4_create_server() = %p\n", server
);
1435 nfs_free_server(server
);
1436 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1437 return ERR_PTR(error
);
1441 * Create an NFS4 referral server record
1443 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1444 struct nfs_fh
*mntfh
)
1446 struct nfs_client
*parent_client
;
1447 struct nfs_server
*server
, *parent_server
;
1450 dprintk("--> nfs4_create_referral_server()\n");
1452 server
= nfs_alloc_server();
1454 return ERR_PTR(-ENOMEM
);
1456 parent_server
= NFS_SB(data
->sb
);
1457 parent_client
= parent_server
->nfs_client
;
1459 /* Initialise the client representation from the parent server */
1460 nfs_server_copy_userdata(server
, parent_server
);
1461 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1463 /* Get a client representation.
1464 * Note: NFSv4 always uses TCP, */
1465 error
= nfs4_set_client(server
, data
->hostname
,
1468 parent_client
->cl_ipaddr
,
1470 parent_server
->client
->cl_xprt
->prot
,
1471 parent_server
->client
->cl_timeout
,
1472 parent_client
->cl_mvops
->minor_version
);
1476 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1480 error
= nfs4_server_common_setup(server
, mntfh
);
1484 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1488 nfs_free_server(server
);
1489 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1490 return ERR_PTR(error
);
1493 #endif /* CONFIG_NFS_V4 */
1496 * Clone an NFS2, NFS3 or NFS4 server record
1498 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1500 struct nfs_fattr
*fattr
)
1502 struct nfs_server
*server
;
1503 struct nfs_fattr
*fattr_fsinfo
;
1506 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1507 (unsigned long long) fattr
->fsid
.major
,
1508 (unsigned long long) fattr
->fsid
.minor
);
1510 server
= nfs_alloc_server();
1512 return ERR_PTR(-ENOMEM
);
1515 fattr_fsinfo
= nfs_alloc_fattr();
1516 if (fattr_fsinfo
== NULL
)
1517 goto out_free_server
;
1519 /* Copy data from the source */
1520 server
->nfs_client
= source
->nfs_client
;
1521 atomic_inc(&server
->nfs_client
->cl_count
);
1522 nfs_server_copy_userdata(server
, source
);
1524 server
->fsid
= fattr
->fsid
;
1526 error
= nfs_init_server_rpcclient(server
,
1527 source
->client
->cl_timeout
,
1528 source
->client
->cl_auth
->au_flavor
);
1530 goto out_free_server
;
1531 if (!IS_ERR(source
->client_acl
))
1532 nfs_init_server_aclclient(server
);
1534 /* probe the filesystem info for this server filesystem */
1535 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1537 goto out_free_server
;
1539 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1540 server
->namelen
= NFS4_MAXNAMLEN
;
1542 dprintk("Cloned FSID: %llx:%llx\n",
1543 (unsigned long long) server
->fsid
.major
,
1544 (unsigned long long) server
->fsid
.minor
);
1546 error
= nfs_start_lockd(server
);
1548 goto out_free_server
;
1550 spin_lock(&nfs_client_lock
);
1551 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1552 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1553 spin_unlock(&nfs_client_lock
);
1555 server
->mount_time
= jiffies
;
1557 nfs_free_fattr(fattr_fsinfo
);
1558 dprintk("<-- nfs_clone_server() = %p\n", server
);
1562 nfs_free_fattr(fattr_fsinfo
);
1563 nfs_free_server(server
);
1564 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1565 return ERR_PTR(error
);
1568 #ifdef CONFIG_PROC_FS
1569 static struct proc_dir_entry
*proc_fs_nfs
;
1571 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1572 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1573 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1574 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1575 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1577 static const struct seq_operations nfs_server_list_ops
= {
1578 .start
= nfs_server_list_start
,
1579 .next
= nfs_server_list_next
,
1580 .stop
= nfs_server_list_stop
,
1581 .show
= nfs_server_list_show
,
1584 static const struct file_operations nfs_server_list_fops
= {
1585 .open
= nfs_server_list_open
,
1587 .llseek
= seq_lseek
,
1588 .release
= seq_release
,
1589 .owner
= THIS_MODULE
,
1592 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1593 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1594 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1595 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1596 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1598 static const struct seq_operations nfs_volume_list_ops
= {
1599 .start
= nfs_volume_list_start
,
1600 .next
= nfs_volume_list_next
,
1601 .stop
= nfs_volume_list_stop
,
1602 .show
= nfs_volume_list_show
,
1605 static const struct file_operations nfs_volume_list_fops
= {
1606 .open
= nfs_volume_list_open
,
1608 .llseek
= seq_lseek
,
1609 .release
= seq_release
,
1610 .owner
= THIS_MODULE
,
1614 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1617 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1622 ret
= seq_open(file
, &nfs_server_list_ops
);
1626 m
= file
->private_data
;
1627 m
->private = PDE(inode
)->data
;
1633 * set up the iterator to start reading from the server list and return the first item
1635 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1637 /* lock the list against modification */
1638 spin_lock(&nfs_client_lock
);
1639 return seq_list_start_head(&nfs_client_list
, *_pos
);
1643 * move to next server
1645 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1647 return seq_list_next(v
, &nfs_client_list
, pos
);
1651 * clean up after reading from the transports list
1653 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1655 spin_unlock(&nfs_client_lock
);
1659 * display a header line followed by a load of call lines
1661 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1663 struct nfs_client
*clp
;
1665 /* display header on line 1 */
1666 if (v
== &nfs_client_list
) {
1667 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1671 /* display one transport per line on subsequent lines */
1672 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1674 seq_printf(m
, "v%u %s %s %3d %s\n",
1675 clp
->rpc_ops
->version
,
1676 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1677 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1678 atomic_read(&clp
->cl_count
),
1685 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1687 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1692 ret
= seq_open(file
, &nfs_volume_list_ops
);
1696 m
= file
->private_data
;
1697 m
->private = PDE(inode
)->data
;
1703 * set up the iterator to start reading from the volume list and return the first item
1705 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1707 /* lock the list against modification */
1708 spin_lock(&nfs_client_lock
);
1709 return seq_list_start_head(&nfs_volume_list
, *_pos
);
1713 * move to next volume
1715 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1717 return seq_list_next(v
, &nfs_volume_list
, pos
);
1721 * clean up after reading from the transports list
1723 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1725 spin_unlock(&nfs_client_lock
);
1729 * display a header line followed by a load of call lines
1731 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1733 struct nfs_server
*server
;
1734 struct nfs_client
*clp
;
1735 char dev
[8], fsid
[17];
1737 /* display header on line 1 */
1738 if (v
== &nfs_volume_list
) {
1739 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1742 /* display one transport per line on subsequent lines */
1743 server
= list_entry(v
, struct nfs_server
, master_link
);
1744 clp
= server
->nfs_client
;
1746 snprintf(dev
, 8, "%u:%u",
1747 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1749 snprintf(fsid
, 17, "%llx:%llx",
1750 (unsigned long long) server
->fsid
.major
,
1751 (unsigned long long) server
->fsid
.minor
);
1753 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1754 clp
->rpc_ops
->version
,
1755 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1756 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1759 nfs_server_fscache_state(server
));
1765 * initialise the /proc/fs/nfsfs/ directory
1767 int __init
nfs_fs_proc_init(void)
1769 struct proc_dir_entry
*p
;
1771 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1775 /* a file of servers with which we're dealing */
1776 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1777 proc_fs_nfs
, &nfs_server_list_fops
);
1781 /* a file of volumes that we have mounted */
1782 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1783 proc_fs_nfs
, &nfs_volume_list_fops
);
1789 remove_proc_entry("servers", proc_fs_nfs
);
1791 remove_proc_entry("fs/nfsfs", NULL
);
1797 * clean up the /proc/fs/nfsfs/ directory
1799 void nfs_fs_proc_exit(void)
1801 remove_proc_entry("volumes", proc_fs_nfs
);
1802 remove_proc_entry("servers", proc_fs_nfs
);
1803 remove_proc_entry("fs/nfsfs", NULL
);
1806 #endif /* CONFIG_PROC_FS */