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
;
159 #if defined(CONFIG_NFS_V4_1)
160 INIT_LIST_HEAD(&clp
->cl_layouts
);
162 nfs_fscache_get_client_cookie(clp
);
174 * Clears/puts all minor version specific parts from an nfs_client struct
175 * reverting it to minorversion 0.
177 static void nfs4_clear_client_minor_version(struct nfs_client
*clp
)
179 #ifdef CONFIG_NFS_V4_1
180 if (nfs4_has_session(clp
)) {
181 nfs4_destroy_session(clp
->cl_session
);
182 clp
->cl_session
= NULL
;
185 clp
->cl_mvops
= nfs_v4_minor_ops
[0];
186 #endif /* CONFIG_NFS_V4_1 */
190 * Destroy the NFS4 callback service
192 static void nfs4_destroy_callback(struct nfs_client
*clp
)
194 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
195 nfs_callback_down(clp
->cl_mvops
->minor_version
);
198 static void nfs4_shutdown_client(struct nfs_client
*clp
)
200 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
201 nfs4_kill_renewd(clp
);
202 nfs4_clear_client_minor_version(clp
);
203 nfs4_destroy_callback(clp
);
204 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
205 nfs_idmap_delete(clp
);
207 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
210 static void nfs4_shutdown_client(struct nfs_client
*clp
)
213 #endif /* CONFIG_NFS_V4 */
216 * Destroy a shared client record
218 static void nfs_free_client(struct nfs_client
*clp
)
220 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
222 nfs4_shutdown_client(clp
);
224 nfs_fscache_release_client_cookie(clp
);
226 /* -EIO all pending I/O */
227 if (!IS_ERR(clp
->cl_rpcclient
))
228 rpc_shutdown_client(clp
->cl_rpcclient
);
230 if (clp
->cl_machine_cred
!= NULL
)
231 put_rpccred(clp
->cl_machine_cred
);
233 kfree(clp
->cl_hostname
);
236 dprintk("<-- nfs_free_client()\n");
240 * Release a reference to a shared client record
242 void nfs_put_client(struct nfs_client
*clp
)
247 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
249 if (atomic_dec_and_lock(&clp
->cl_count
, &nfs_client_lock
)) {
250 list_del(&clp
->cl_share_link
);
251 spin_unlock(&nfs_client_lock
);
253 BUG_ON(!list_empty(&clp
->cl_superblocks
));
255 nfs_free_client(clp
);
258 EXPORT_SYMBOL_GPL(nfs_put_client
);
260 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
262 * Test if two ip6 socket addresses refer to the same socket by
263 * comparing relevant fields. The padding bytes specifically, are not
264 * compared. sin6_flowinfo is not compared because it only affects QoS
265 * and sin6_scope_id is only compared if the address is "link local"
266 * because "link local" addresses need only be unique to a specific
267 * link. Conversely, ordinary unicast addresses might have different
270 * The caller should ensure both socket addresses are AF_INET6.
272 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
273 const struct sockaddr
*sa2
)
275 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
276 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
278 if (ipv6_addr_scope(&sin1
->sin6_addr
) == IPV6_ADDR_SCOPE_LINKLOCAL
&&
279 sin1
->sin6_scope_id
!= sin2
->sin6_scope_id
)
282 return ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
);
284 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
285 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr
*sa1
,
286 const struct sockaddr
*sa2
)
293 * Test if two ip4 socket addresses refer to the same socket, by
294 * comparing relevant fields. The padding bytes specifically, are
297 * The caller should ensure both socket addresses are AF_INET.
299 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr
*sa1
,
300 const struct sockaddr
*sa2
)
302 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
303 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
305 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
308 static int nfs_sockaddr_cmp_ip6(const struct sockaddr
*sa1
,
309 const struct sockaddr
*sa2
)
311 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sa1
;
312 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sa2
;
314 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
) &&
315 (sin1
->sin6_port
== sin2
->sin6_port
);
318 static int nfs_sockaddr_cmp_ip4(const struct sockaddr
*sa1
,
319 const struct sockaddr
*sa2
)
321 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sa1
;
322 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sa2
;
324 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
) &&
325 (sin1
->sin_port
== sin2
->sin_port
);
329 * Test if two socket addresses represent the same actual socket,
330 * by comparing (only) relevant fields, excluding the port number.
332 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
333 const struct sockaddr
*sa2
)
335 if (sa1
->sa_family
!= sa2
->sa_family
)
338 switch (sa1
->sa_family
) {
340 return nfs_sockaddr_match_ipaddr4(sa1
, sa2
);
342 return nfs_sockaddr_match_ipaddr6(sa1
, sa2
);
348 * Test if two socket addresses represent the same actual socket,
349 * by comparing (only) relevant fields, including the port number.
351 static int nfs_sockaddr_cmp(const struct sockaddr
*sa1
,
352 const struct sockaddr
*sa2
)
354 if (sa1
->sa_family
!= sa2
->sa_family
)
357 switch (sa1
->sa_family
) {
359 return nfs_sockaddr_cmp_ip4(sa1
, sa2
);
361 return nfs_sockaddr_cmp_ip6(sa1
, sa2
);
367 * Find a client by IP address and protocol version
368 * - returns NULL if no such client
370 struct nfs_client
*nfs_find_client(const struct sockaddr
*addr
, u32 nfsversion
)
372 struct nfs_client
*clp
;
374 spin_lock(&nfs_client_lock
);
375 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
376 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
378 /* Don't match clients that failed to initialise properly */
379 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
380 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
383 /* Different NFS versions cannot share the same nfs_client */
384 if (clp
->rpc_ops
->version
!= nfsversion
)
387 /* Match only the IP address, not the port number */
388 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
391 atomic_inc(&clp
->cl_count
);
392 spin_unlock(&nfs_client_lock
);
395 spin_unlock(&nfs_client_lock
);
400 * Find a client by IP address and protocol version
401 * - returns NULL if no such client
403 struct nfs_client
*nfs_find_client_next(struct nfs_client
*clp
)
405 struct sockaddr
*sap
= (struct sockaddr
*)&clp
->cl_addr
;
406 u32 nfsvers
= clp
->rpc_ops
->version
;
408 spin_lock(&nfs_client_lock
);
409 list_for_each_entry_continue(clp
, &nfs_client_list
, cl_share_link
) {
410 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
412 /* Don't match clients that failed to initialise properly */
413 if (clp
->cl_cons_state
!= NFS_CS_READY
)
416 /* Different NFS versions cannot share the same nfs_client */
417 if (clp
->rpc_ops
->version
!= nfsvers
)
420 /* Match only the IP address, not the port number */
421 if (!nfs_sockaddr_match_ipaddr(sap
, clap
))
424 atomic_inc(&clp
->cl_count
);
425 spin_unlock(&nfs_client_lock
);
428 spin_unlock(&nfs_client_lock
);
433 * Find an nfs_client on the list that matches the initialisation data
436 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
438 struct nfs_client
*clp
;
439 const struct sockaddr
*sap
= data
->addr
;
441 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
442 const struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
443 /* Don't match clients that failed to initialise properly */
444 if (clp
->cl_cons_state
< 0)
447 /* Different NFS versions cannot share the same nfs_client */
448 if (clp
->rpc_ops
!= data
->rpc_ops
)
451 if (clp
->cl_proto
!= data
->proto
)
453 /* Match nfsv4 minorversion */
454 if (clp
->cl_minorversion
!= data
->minorversion
)
456 /* Match the full socket address */
457 if (!nfs_sockaddr_cmp(sap
, clap
))
460 atomic_inc(&clp
->cl_count
);
467 * Look up a client by IP address and protocol version
468 * - creates a new record if one doesn't yet exist
470 static struct nfs_client
*nfs_get_client(const struct nfs_client_initdata
*cl_init
)
472 struct nfs_client
*clp
, *new = NULL
;
475 dprintk("--> nfs_get_client(%s,v%u)\n",
476 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
478 /* see if the client already exists */
480 spin_lock(&nfs_client_lock
);
482 clp
= nfs_match_client(cl_init
);
488 spin_unlock(&nfs_client_lock
);
490 new = nfs_alloc_client(cl_init
);
491 } while (!IS_ERR(new));
493 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
496 /* install a new client and return with it unready */
499 list_add(&clp
->cl_share_link
, &nfs_client_list
);
500 spin_unlock(&nfs_client_lock
);
501 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
504 /* found an existing client
505 * - make sure it's ready before returning
508 spin_unlock(&nfs_client_lock
);
511 nfs_free_client(new);
513 error
= wait_event_killable(nfs_client_active_wq
,
514 clp
->cl_cons_state
< NFS_CS_INITING
);
517 return ERR_PTR(-ERESTARTSYS
);
520 if (clp
->cl_cons_state
< NFS_CS_READY
) {
521 error
= clp
->cl_cons_state
;
523 return ERR_PTR(error
);
526 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
528 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
533 * Mark a server as ready or failed
535 void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
537 clp
->cl_cons_state
= state
;
538 wake_up_all(&nfs_client_active_wq
);
542 * With sessions, the client is not marked ready until after a
543 * successful EXCHANGE_ID and CREATE_SESSION.
545 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
546 * other versions of NFS can be tried.
548 int nfs4_check_client_ready(struct nfs_client
*clp
)
550 if (!nfs4_has_session(clp
))
552 if (clp
->cl_cons_state
< NFS_CS_READY
)
553 return -EPROTONOSUPPORT
;
558 * Initialise the timeout values for a connection
560 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
561 unsigned int timeo
, unsigned int retrans
)
563 to
->to_initval
= timeo
* HZ
/ 10;
564 to
->to_retries
= retrans
;
567 case XPRT_TRANSPORT_TCP
:
568 case XPRT_TRANSPORT_RDMA
:
569 if (to
->to_retries
== 0)
570 to
->to_retries
= NFS_DEF_TCP_RETRANS
;
571 if (to
->to_initval
== 0)
572 to
->to_initval
= NFS_DEF_TCP_TIMEO
* HZ
/ 10;
573 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
574 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
575 to
->to_increment
= to
->to_initval
;
576 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
577 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
578 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
579 if (to
->to_maxval
< to
->to_initval
)
580 to
->to_maxval
= to
->to_initval
;
581 to
->to_exponential
= 0;
583 case XPRT_TRANSPORT_UDP
:
584 if (to
->to_retries
== 0)
585 to
->to_retries
= NFS_DEF_UDP_RETRANS
;
587 to
->to_initval
= NFS_DEF_UDP_TIMEO
* HZ
/ 10;
588 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
589 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
590 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
591 to
->to_exponential
= 1;
599 * Create an RPC client handle
601 static int nfs_create_rpc_client(struct nfs_client
*clp
,
602 const struct rpc_timeout
*timeparms
,
603 rpc_authflavor_t flavor
,
604 int discrtry
, int noresvport
)
606 struct rpc_clnt
*clnt
= NULL
;
607 struct rpc_create_args args
= {
609 .protocol
= clp
->cl_proto
,
610 .address
= (struct sockaddr
*)&clp
->cl_addr
,
611 .addrsize
= clp
->cl_addrlen
,
612 .timeout
= timeparms
,
613 .servername
= clp
->cl_hostname
,
614 .program
= &nfs_program
,
615 .version
= clp
->rpc_ops
->version
,
616 .authflavor
= flavor
,
620 args
.flags
|= RPC_CLNT_CREATE_DISCRTRY
;
622 args
.flags
|= RPC_CLNT_CREATE_NONPRIVPORT
;
624 if (!IS_ERR(clp
->cl_rpcclient
))
627 clnt
= rpc_create(&args
);
629 dprintk("%s: cannot create RPC client. Error = %ld\n",
630 __func__
, PTR_ERR(clnt
));
631 return PTR_ERR(clnt
);
634 clp
->cl_rpcclient
= clnt
;
639 * Version 2 or 3 client destruction
641 static void nfs_destroy_server(struct nfs_server
*server
)
643 if (!(server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) ||
644 !(server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
645 nlmclnt_done(server
->nlm_host
);
649 * Version 2 or 3 lockd setup
651 static int nfs_start_lockd(struct nfs_server
*server
)
653 struct nlm_host
*host
;
654 struct nfs_client
*clp
= server
->nfs_client
;
655 struct nlmclnt_initdata nlm_init
= {
656 .hostname
= clp
->cl_hostname
,
657 .address
= (struct sockaddr
*)&clp
->cl_addr
,
658 .addrlen
= clp
->cl_addrlen
,
659 .nfs_version
= clp
->rpc_ops
->version
,
660 .noresvport
= server
->flags
& NFS_MOUNT_NORESVPORT
?
664 if (nlm_init
.nfs_version
> 3)
666 if ((server
->flags
& NFS_MOUNT_LOCAL_FLOCK
) &&
667 (server
->flags
& NFS_MOUNT_LOCAL_FCNTL
))
670 switch (clp
->cl_proto
) {
672 nlm_init
.protocol
= IPPROTO_TCP
;
674 case XPRT_TRANSPORT_UDP
:
675 nlm_init
.protocol
= IPPROTO_UDP
;
678 host
= nlmclnt_init(&nlm_init
);
680 return PTR_ERR(host
);
682 server
->nlm_host
= host
;
683 server
->destroy
= nfs_destroy_server
;
688 * Initialise an NFSv3 ACL client connection
690 #ifdef CONFIG_NFS_V3_ACL
691 static void nfs_init_server_aclclient(struct nfs_server
*server
)
693 if (server
->nfs_client
->rpc_ops
->version
!= 3)
695 if (server
->flags
& NFS_MOUNT_NOACL
)
698 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
699 if (IS_ERR(server
->client_acl
))
702 /* No errors! Assume that Sun nfsacls are supported */
703 server
->caps
|= NFS_CAP_ACLS
;
707 server
->caps
&= ~NFS_CAP_ACLS
;
710 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
712 server
->flags
&= ~NFS_MOUNT_NOACL
;
713 server
->caps
&= ~NFS_CAP_ACLS
;
718 * Create a general RPC client
720 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
721 const struct rpc_timeout
*timeo
,
722 rpc_authflavor_t pseudoflavour
)
724 struct nfs_client
*clp
= server
->nfs_client
;
726 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
727 if (IS_ERR(server
->client
)) {
728 dprintk("%s: couldn't create rpc_client!\n", __func__
);
729 return PTR_ERR(server
->client
);
732 memcpy(&server
->client
->cl_timeout_default
,
734 sizeof(server
->client
->cl_timeout_default
));
735 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
737 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
738 struct rpc_auth
*auth
;
740 auth
= rpcauth_create(pseudoflavour
, server
->client
);
742 dprintk("%s: couldn't create credcache!\n", __func__
);
743 return PTR_ERR(auth
);
746 server
->client
->cl_softrtry
= 0;
747 if (server
->flags
& NFS_MOUNT_SOFT
)
748 server
->client
->cl_softrtry
= 1;
754 * Initialise an NFS2 or NFS3 client
756 static int nfs_init_client(struct nfs_client
*clp
,
757 const struct rpc_timeout
*timeparms
,
758 const struct nfs_parsed_mount_data
*data
)
762 if (clp
->cl_cons_state
== NFS_CS_READY
) {
763 /* the client is already initialised */
764 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
769 * Create a client RPC handle for doing FSSTAT with UNIX auth only
770 * - RFC 2623, sec 2.3.2
772 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
,
773 0, data
->flags
& NFS_MOUNT_NORESVPORT
);
776 nfs_mark_client_ready(clp
, NFS_CS_READY
);
780 nfs_mark_client_ready(clp
, error
);
781 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
786 * Create a version 2 or 3 client
788 static int nfs_init_server(struct nfs_server
*server
,
789 const struct nfs_parsed_mount_data
*data
)
791 struct nfs_client_initdata cl_init
= {
792 .hostname
= data
->nfs_server
.hostname
,
793 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
794 .addrlen
= data
->nfs_server
.addrlen
,
795 .rpc_ops
= &nfs_v2_clientops
,
796 .proto
= data
->nfs_server
.protocol
,
798 struct rpc_timeout timeparms
;
799 struct nfs_client
*clp
;
802 dprintk("--> nfs_init_server()\n");
805 if (data
->version
== 3)
806 cl_init
.rpc_ops
= &nfs_v3_clientops
;
809 /* Allocate or find a client reference we can use */
810 clp
= nfs_get_client(&cl_init
);
812 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
816 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
817 data
->timeo
, data
->retrans
);
818 error
= nfs_init_client(clp
, &timeparms
, data
);
822 server
->nfs_client
= clp
;
824 /* Initialise the client representation from the mount data */
825 server
->flags
= data
->flags
;
826 server
->options
= data
->options
;
827 server
->caps
|= NFS_CAP_HARDLINKS
|NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
828 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|NFS_CAP_OWNER_GROUP
|
829 NFS_CAP_ATIME
|NFS_CAP_CTIME
|NFS_CAP_MTIME
;
832 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
834 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
836 server
->acregmin
= data
->acregmin
* HZ
;
837 server
->acregmax
= data
->acregmax
* HZ
;
838 server
->acdirmin
= data
->acdirmin
* HZ
;
839 server
->acdirmax
= data
->acdirmax
* HZ
;
841 /* Start lockd here, before we might error out */
842 error
= nfs_start_lockd(server
);
846 server
->port
= data
->nfs_server
.port
;
848 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
852 /* Preserve the values of mount_server-related mount options */
853 if (data
->mount_server
.addrlen
) {
854 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
855 data
->mount_server
.addrlen
);
856 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
858 server
->mountd_version
= data
->mount_server
.version
;
859 server
->mountd_port
= data
->mount_server
.port
;
860 server
->mountd_protocol
= data
->mount_server
.protocol
;
862 server
->namelen
= data
->namlen
;
863 /* Create a client RPC handle for the NFSv3 ACL management interface */
864 nfs_init_server_aclclient(server
);
865 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
869 server
->nfs_client
= NULL
;
871 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
876 * Load up the server record from information gained in an fsinfo record
878 static void nfs_server_set_fsinfo(struct nfs_server
*server
, struct nfs_fsinfo
*fsinfo
)
880 unsigned long max_rpc_payload
;
882 /* Work out a lot of parameters */
883 if (server
->rsize
== 0)
884 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
885 if (server
->wsize
== 0)
886 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
888 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
889 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
890 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
891 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
893 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
894 if (server
->rsize
> max_rpc_payload
)
895 server
->rsize
= max_rpc_payload
;
896 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
897 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
898 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
900 server
->backing_dev_info
.name
= "nfs";
901 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
903 if (server
->wsize
> max_rpc_payload
)
904 server
->wsize
= max_rpc_payload
;
905 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
906 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
907 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
908 set_pnfs_layoutdriver(server
, fsinfo
->layouttype
);
910 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
912 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
913 if (server
->dtsize
> PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
)
914 server
->dtsize
= PAGE_CACHE_SIZE
* NFS_MAX_READDIR_PAGES
;
915 if (server
->dtsize
> server
->rsize
)
916 server
->dtsize
= server
->rsize
;
918 if (server
->flags
& NFS_MOUNT_NOAC
) {
919 server
->acregmin
= server
->acregmax
= 0;
920 server
->acdirmin
= server
->acdirmax
= 0;
923 server
->maxfilesize
= fsinfo
->maxfilesize
;
925 server
->time_delta
= fsinfo
->time_delta
;
927 /* We're airborne Set socket buffersize */
928 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
932 * Probe filesystem information, including the FSID on v2/v3
934 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
936 struct nfs_fsinfo fsinfo
;
937 struct nfs_client
*clp
= server
->nfs_client
;
940 dprintk("--> nfs_probe_fsinfo()\n");
942 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
943 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
948 fsinfo
.fattr
= fattr
;
949 fsinfo
.layouttype
= 0;
950 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
954 nfs_server_set_fsinfo(server
, &fsinfo
);
956 /* Get some general file system info */
957 if (server
->namelen
== 0) {
958 struct nfs_pathconf pathinfo
;
960 pathinfo
.fattr
= fattr
;
961 nfs_fattr_init(fattr
);
963 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
964 server
->namelen
= pathinfo
.max_namelen
;
967 dprintk("<-- nfs_probe_fsinfo() = 0\n");
971 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
976 * Copy useful information when duplicating a server record
978 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
980 target
->flags
= source
->flags
;
981 target
->rsize
= source
->rsize
;
982 target
->wsize
= source
->wsize
;
983 target
->acregmin
= source
->acregmin
;
984 target
->acregmax
= source
->acregmax
;
985 target
->acdirmin
= source
->acdirmin
;
986 target
->acdirmax
= source
->acdirmax
;
987 target
->caps
= source
->caps
;
988 target
->options
= source
->options
;
992 * Allocate and initialise a server record
994 static struct nfs_server
*nfs_alloc_server(void)
996 struct nfs_server
*server
;
998 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
1002 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
1004 /* Zero out the NFS state stuff */
1005 INIT_LIST_HEAD(&server
->client_link
);
1006 INIT_LIST_HEAD(&server
->master_link
);
1008 atomic_set(&server
->active
, 0);
1010 server
->io_stats
= nfs_alloc_iostats();
1011 if (!server
->io_stats
) {
1016 if (bdi_init(&server
->backing_dev_info
)) {
1017 nfs_free_iostats(server
->io_stats
);
1026 * Free up a server record
1028 void nfs_free_server(struct nfs_server
*server
)
1030 dprintk("--> nfs_free_server()\n");
1032 unset_pnfs_layoutdriver(server
);
1033 spin_lock(&nfs_client_lock
);
1034 list_del(&server
->client_link
);
1035 list_del(&server
->master_link
);
1036 spin_unlock(&nfs_client_lock
);
1038 if (server
->destroy
!= NULL
)
1039 server
->destroy(server
);
1041 if (!IS_ERR(server
->client_acl
))
1042 rpc_shutdown_client(server
->client_acl
);
1043 if (!IS_ERR(server
->client
))
1044 rpc_shutdown_client(server
->client
);
1046 nfs_put_client(server
->nfs_client
);
1048 nfs_free_iostats(server
->io_stats
);
1049 bdi_destroy(&server
->backing_dev_info
);
1051 nfs_release_automount_timer();
1052 dprintk("<-- nfs_free_server()\n");
1056 * Create a version 2 or 3 volume record
1057 * - keyed on server and FSID
1059 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
1060 struct nfs_fh
*mntfh
)
1062 struct nfs_server
*server
;
1063 struct nfs_fattr
*fattr
;
1066 server
= nfs_alloc_server();
1068 return ERR_PTR(-ENOMEM
);
1071 fattr
= nfs_alloc_fattr();
1075 /* Get a client representation */
1076 error
= nfs_init_server(server
, data
);
1080 BUG_ON(!server
->nfs_client
);
1081 BUG_ON(!server
->nfs_client
->rpc_ops
);
1082 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1084 /* Probe the root fh to retrieve its FSID */
1085 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1088 if (server
->nfs_client
->rpc_ops
->version
== 3) {
1089 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
1090 server
->namelen
= NFS3_MAXNAMLEN
;
1091 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1092 server
->caps
|= NFS_CAP_READDIRPLUS
;
1094 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
1095 server
->namelen
= NFS2_MAXNAMLEN
;
1098 if (!(fattr
->valid
& NFS_ATTR_FATTR
)) {
1099 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, fattr
);
1101 dprintk("nfs_create_server: getattr error = %d\n", -error
);
1105 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
1107 dprintk("Server FSID: %llx:%llx\n",
1108 (unsigned long long) server
->fsid
.major
,
1109 (unsigned long long) server
->fsid
.minor
);
1111 spin_lock(&nfs_client_lock
);
1112 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1113 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1114 spin_unlock(&nfs_client_lock
);
1116 server
->mount_time
= jiffies
;
1117 nfs_free_fattr(fattr
);
1121 nfs_free_fattr(fattr
);
1122 nfs_free_server(server
);
1123 return ERR_PTR(error
);
1126 #ifdef CONFIG_NFS_V4
1128 * Initialize the NFS4 callback service
1130 static int nfs4_init_callback(struct nfs_client
*clp
)
1134 if (clp
->rpc_ops
->version
== 4) {
1135 if (nfs4_has_session(clp
)) {
1136 error
= xprt_setup_backchannel(
1137 clp
->cl_rpcclient
->cl_xprt
,
1138 NFS41_BC_MIN_CALLBACKS
);
1143 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
,
1144 clp
->cl_rpcclient
->cl_xprt
);
1146 dprintk("%s: failed to start callback. Error = %d\n",
1150 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
1156 * Initialize the minor version specific parts of an NFS4 client record
1158 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
1160 #if defined(CONFIG_NFS_V4_1)
1161 if (clp
->cl_mvops
->minor_version
) {
1162 struct nfs4_session
*session
= NULL
;
1164 * Create the session and mark it expired.
1165 * When a SEQUENCE operation encounters the expired session
1166 * it will do session recovery to initialize it.
1168 session
= nfs4_alloc_session(clp
);
1172 clp
->cl_session
= session
;
1174 * The create session reply races with the server back
1175 * channel probe. Mark the client NFS_CS_SESSION_INITING
1176 * so that the client back channel can find the
1179 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
1181 #endif /* CONFIG_NFS_V4_1 */
1183 return nfs4_init_callback(clp
);
1187 * Initialise an NFS4 client record
1189 static int nfs4_init_client(struct nfs_client
*clp
,
1190 const struct rpc_timeout
*timeparms
,
1191 const char *ip_addr
,
1192 rpc_authflavor_t authflavour
,
1197 if (clp
->cl_cons_state
== NFS_CS_READY
) {
1198 /* the client is initialised already */
1199 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
1203 /* Check NFS protocol revision and initialize RPC op vector */
1204 clp
->rpc_ops
= &nfs_v4_clientops
;
1206 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
,
1207 1, flags
& NFS_MOUNT_NORESVPORT
);
1210 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
1212 error
= nfs_idmap_new(clp
);
1214 dprintk("%s: failed to create idmapper. Error = %d\n",
1218 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
1220 error
= nfs4_init_client_minor_version(clp
);
1224 if (!nfs4_has_session(clp
))
1225 nfs_mark_client_ready(clp
, NFS_CS_READY
);
1229 nfs_mark_client_ready(clp
, error
);
1230 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1235 * Set up an NFS4 client
1237 static int nfs4_set_client(struct nfs_server
*server
,
1238 const char *hostname
,
1239 const struct sockaddr
*addr
,
1240 const size_t addrlen
,
1241 const char *ip_addr
,
1242 rpc_authflavor_t authflavour
,
1243 int proto
, const struct rpc_timeout
*timeparms
,
1246 struct nfs_client_initdata cl_init
= {
1247 .hostname
= hostname
,
1250 .rpc_ops
= &nfs_v4_clientops
,
1252 .minorversion
= minorversion
,
1254 struct nfs_client
*clp
;
1257 dprintk("--> nfs4_set_client()\n");
1259 /* Allocate or find a client reference we can use */
1260 clp
= nfs_get_client(&cl_init
);
1262 error
= PTR_ERR(clp
);
1265 error
= nfs4_init_client(clp
, timeparms
, ip_addr
, authflavour
,
1270 server
->nfs_client
= clp
;
1271 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1275 nfs_put_client(clp
);
1277 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1283 * Session has been established, and the client marked ready.
1284 * Set the mount rsize and wsize with negotiated fore channel
1285 * attributes which will be bound checked in nfs_server_set_fsinfo.
1287 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
1289 #ifdef CONFIG_NFS_V4_1
1290 struct nfs4_session
*sess
;
1294 if (!nfs4_has_session(server
->nfs_client
))
1296 sess
= server
->nfs_client
->cl_session
;
1297 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
1298 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
1300 if (server
->rsize
> server_resp_sz
)
1301 server
->rsize
= server_resp_sz
;
1302 if (server
->wsize
> server_rqst_sz
)
1303 server
->wsize
= server_rqst_sz
;
1304 #endif /* CONFIG_NFS_V4_1 */
1307 static int nfs4_server_common_setup(struct nfs_server
*server
,
1308 struct nfs_fh
*mntfh
)
1310 struct nfs_fattr
*fattr
;
1313 BUG_ON(!server
->nfs_client
);
1314 BUG_ON(!server
->nfs_client
->rpc_ops
);
1315 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1317 fattr
= nfs_alloc_fattr();
1321 /* We must ensure the session is initialised first */
1322 error
= nfs4_init_session(server
);
1326 /* Probe the root fh to retrieve its FSID and filehandle */
1327 error
= nfs4_get_rootfh(server
, mntfh
);
1331 dprintk("Server FSID: %llx:%llx\n",
1332 (unsigned long long) server
->fsid
.major
,
1333 (unsigned long long) server
->fsid
.minor
);
1334 dprintk("Mount FH: %d\n", mntfh
->size
);
1336 nfs4_session_set_rwsize(server
);
1338 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
1342 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1343 server
->namelen
= NFS4_MAXNAMLEN
;
1345 spin_lock(&nfs_client_lock
);
1346 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1347 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1348 spin_unlock(&nfs_client_lock
);
1350 server
->mount_time
= jiffies
;
1352 nfs_free_fattr(fattr
);
1357 * Create a version 4 volume record
1359 static int nfs4_init_server(struct nfs_server
*server
,
1360 const struct nfs_parsed_mount_data
*data
)
1362 struct rpc_timeout timeparms
;
1365 dprintk("--> nfs4_init_server()\n");
1367 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1368 data
->timeo
, data
->retrans
);
1370 /* Initialise the client representation from the mount data */
1371 server
->flags
= data
->flags
;
1372 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
|NFS_CAP_POSIX_LOCK
;
1373 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
1374 server
->caps
|= NFS_CAP_READDIRPLUS
;
1375 server
->options
= data
->options
;
1377 /* Get a client record */
1378 error
= nfs4_set_client(server
,
1379 data
->nfs_server
.hostname
,
1380 (const struct sockaddr
*)&data
->nfs_server
.address
,
1381 data
->nfs_server
.addrlen
,
1382 data
->client_address
,
1383 data
->auth_flavors
[0],
1384 data
->nfs_server
.protocol
,
1386 data
->minorversion
);
1391 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1393 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1395 server
->acregmin
= data
->acregmin
* HZ
;
1396 server
->acregmax
= data
->acregmax
* HZ
;
1397 server
->acdirmin
= data
->acdirmin
* HZ
;
1398 server
->acdirmax
= data
->acdirmax
* HZ
;
1400 server
->port
= data
->nfs_server
.port
;
1402 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1406 dprintk("<-- nfs4_init_server() = %d\n", error
);
1411 * Create a version 4 volume record
1412 * - keyed on server and FSID
1414 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1415 struct nfs_fh
*mntfh
)
1417 struct nfs_server
*server
;
1420 dprintk("--> nfs4_create_server()\n");
1422 server
= nfs_alloc_server();
1424 return ERR_PTR(-ENOMEM
);
1426 /* set up the general RPC client */
1427 error
= nfs4_init_server(server
, data
);
1431 error
= nfs4_server_common_setup(server
, mntfh
);
1435 dprintk("<-- nfs4_create_server() = %p\n", server
);
1439 nfs_free_server(server
);
1440 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1441 return ERR_PTR(error
);
1445 * Create an NFS4 referral server record
1447 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1448 struct nfs_fh
*mntfh
)
1450 struct nfs_client
*parent_client
;
1451 struct nfs_server
*server
, *parent_server
;
1454 dprintk("--> nfs4_create_referral_server()\n");
1456 server
= nfs_alloc_server();
1458 return ERR_PTR(-ENOMEM
);
1460 parent_server
= NFS_SB(data
->sb
);
1461 parent_client
= parent_server
->nfs_client
;
1463 /* Initialise the client representation from the parent server */
1464 nfs_server_copy_userdata(server
, parent_server
);
1465 server
->caps
|= NFS_CAP_ATOMIC_OPEN
|NFS_CAP_CHANGE_ATTR
;
1467 /* Get a client representation.
1468 * Note: NFSv4 always uses TCP, */
1469 error
= nfs4_set_client(server
, data
->hostname
,
1472 parent_client
->cl_ipaddr
,
1474 parent_server
->client
->cl_xprt
->prot
,
1475 parent_server
->client
->cl_timeout
,
1476 parent_client
->cl_mvops
->minor_version
);
1480 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1484 error
= nfs4_server_common_setup(server
, mntfh
);
1488 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1492 nfs_free_server(server
);
1493 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1494 return ERR_PTR(error
);
1497 #endif /* CONFIG_NFS_V4 */
1500 * Clone an NFS2, NFS3 or NFS4 server record
1502 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1504 struct nfs_fattr
*fattr
)
1506 struct nfs_server
*server
;
1507 struct nfs_fattr
*fattr_fsinfo
;
1510 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1511 (unsigned long long) fattr
->fsid
.major
,
1512 (unsigned long long) fattr
->fsid
.minor
);
1514 server
= nfs_alloc_server();
1516 return ERR_PTR(-ENOMEM
);
1519 fattr_fsinfo
= nfs_alloc_fattr();
1520 if (fattr_fsinfo
== NULL
)
1521 goto out_free_server
;
1523 /* Copy data from the source */
1524 server
->nfs_client
= source
->nfs_client
;
1525 atomic_inc(&server
->nfs_client
->cl_count
);
1526 nfs_server_copy_userdata(server
, source
);
1528 server
->fsid
= fattr
->fsid
;
1530 error
= nfs_init_server_rpcclient(server
,
1531 source
->client
->cl_timeout
,
1532 source
->client
->cl_auth
->au_flavor
);
1534 goto out_free_server
;
1535 if (!IS_ERR(source
->client_acl
))
1536 nfs_init_server_aclclient(server
);
1538 /* probe the filesystem info for this server filesystem */
1539 error
= nfs_probe_fsinfo(server
, fh
, fattr_fsinfo
);
1541 goto out_free_server
;
1543 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1544 server
->namelen
= NFS4_MAXNAMLEN
;
1546 dprintk("Cloned FSID: %llx:%llx\n",
1547 (unsigned long long) server
->fsid
.major
,
1548 (unsigned long long) server
->fsid
.minor
);
1550 error
= nfs_start_lockd(server
);
1552 goto out_free_server
;
1554 spin_lock(&nfs_client_lock
);
1555 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1556 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1557 spin_unlock(&nfs_client_lock
);
1559 server
->mount_time
= jiffies
;
1561 nfs_free_fattr(fattr_fsinfo
);
1562 dprintk("<-- nfs_clone_server() = %p\n", server
);
1566 nfs_free_fattr(fattr_fsinfo
);
1567 nfs_free_server(server
);
1568 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1569 return ERR_PTR(error
);
1572 #ifdef CONFIG_PROC_FS
1573 static struct proc_dir_entry
*proc_fs_nfs
;
1575 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1576 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1577 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1578 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1579 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1581 static const struct seq_operations nfs_server_list_ops
= {
1582 .start
= nfs_server_list_start
,
1583 .next
= nfs_server_list_next
,
1584 .stop
= nfs_server_list_stop
,
1585 .show
= nfs_server_list_show
,
1588 static const struct file_operations nfs_server_list_fops
= {
1589 .open
= nfs_server_list_open
,
1591 .llseek
= seq_lseek
,
1592 .release
= seq_release
,
1593 .owner
= THIS_MODULE
,
1596 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1597 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1598 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1599 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1600 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1602 static const struct seq_operations nfs_volume_list_ops
= {
1603 .start
= nfs_volume_list_start
,
1604 .next
= nfs_volume_list_next
,
1605 .stop
= nfs_volume_list_stop
,
1606 .show
= nfs_volume_list_show
,
1609 static const struct file_operations nfs_volume_list_fops
= {
1610 .open
= nfs_volume_list_open
,
1612 .llseek
= seq_lseek
,
1613 .release
= seq_release
,
1614 .owner
= THIS_MODULE
,
1618 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1621 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1626 ret
= seq_open(file
, &nfs_server_list_ops
);
1630 m
= file
->private_data
;
1631 m
->private = PDE(inode
)->data
;
1637 * set up the iterator to start reading from the server list and return the first item
1639 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1641 /* lock the list against modification */
1642 spin_lock(&nfs_client_lock
);
1643 return seq_list_start_head(&nfs_client_list
, *_pos
);
1647 * move to next server
1649 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1651 return seq_list_next(v
, &nfs_client_list
, pos
);
1655 * clean up after reading from the transports list
1657 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1659 spin_unlock(&nfs_client_lock
);
1663 * display a header line followed by a load of call lines
1665 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1667 struct nfs_client
*clp
;
1669 /* display header on line 1 */
1670 if (v
== &nfs_client_list
) {
1671 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1675 /* display one transport per line on subsequent lines */
1676 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1678 seq_printf(m
, "v%u %s %s %3d %s\n",
1679 clp
->rpc_ops
->version
,
1680 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1681 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1682 atomic_read(&clp
->cl_count
),
1689 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1691 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1696 ret
= seq_open(file
, &nfs_volume_list_ops
);
1700 m
= file
->private_data
;
1701 m
->private = PDE(inode
)->data
;
1707 * set up the iterator to start reading from the volume list and return the first item
1709 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1711 /* lock the list against modification */
1712 spin_lock(&nfs_client_lock
);
1713 return seq_list_start_head(&nfs_volume_list
, *_pos
);
1717 * move to next volume
1719 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1721 return seq_list_next(v
, &nfs_volume_list
, pos
);
1725 * clean up after reading from the transports list
1727 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1729 spin_unlock(&nfs_client_lock
);
1733 * display a header line followed by a load of call lines
1735 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1737 struct nfs_server
*server
;
1738 struct nfs_client
*clp
;
1739 char dev
[8], fsid
[17];
1741 /* display header on line 1 */
1742 if (v
== &nfs_volume_list
) {
1743 seq_puts(m
, "NV SERVER PORT DEV FSID FSC\n");
1746 /* display one transport per line on subsequent lines */
1747 server
= list_entry(v
, struct nfs_server
, master_link
);
1748 clp
= server
->nfs_client
;
1750 snprintf(dev
, 8, "%u:%u",
1751 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1753 snprintf(fsid
, 17, "%llx:%llx",
1754 (unsigned long long) server
->fsid
.major
,
1755 (unsigned long long) server
->fsid
.minor
);
1757 seq_printf(m
, "v%u %s %s %-7s %-17s %s\n",
1758 clp
->rpc_ops
->version
,
1759 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1760 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1763 nfs_server_fscache_state(server
));
1769 * initialise the /proc/fs/nfsfs/ directory
1771 int __init
nfs_fs_proc_init(void)
1773 struct proc_dir_entry
*p
;
1775 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1779 /* a file of servers with which we're dealing */
1780 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1781 proc_fs_nfs
, &nfs_server_list_fops
);
1785 /* a file of volumes that we have mounted */
1786 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1787 proc_fs_nfs
, &nfs_volume_list_fops
);
1793 remove_proc_entry("servers", proc_fs_nfs
);
1795 remove_proc_entry("fs/nfsfs", NULL
);
1801 * clean up the /proc/fs/nfsfs/ directory
1803 void nfs_fs_proc_exit(void)
1805 remove_proc_entry("volumes", proc_fs_nfs
);
1806 remove_proc_entry("servers", proc_fs_nfs
);
1807 remove_proc_entry("fs/nfsfs", NULL
);
1810 #endif /* CONFIG_PROC_FS */