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>
39 #include <linux/nfs_xdr.h>
41 #include <asm/system.h>
45 #include "delegation.h"
49 #define NFSDBG_FACILITY NFSDBG_CLIENT
51 static DEFINE_SPINLOCK(nfs_client_lock
);
52 static LIST_HEAD(nfs_client_list
);
53 static LIST_HEAD(nfs_volume_list
);
54 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
59 static struct rpc_version
*nfs_version
[5] = {
69 struct rpc_program nfs_program
= {
71 .number
= NFS_PROGRAM
,
72 .nrvers
= ARRAY_SIZE(nfs_version
),
73 .version
= nfs_version
,
74 .stats
= &nfs_rpcstat
,
75 .pipe_dir_name
= "/nfs",
78 struct rpc_stat nfs_rpcstat
= {
79 .program
= &nfs_program
83 #ifdef CONFIG_NFS_V3_ACL
84 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
85 static struct rpc_version
* nfsacl_version
[] = {
86 [3] = &nfsacl_version3
,
89 struct rpc_program nfsacl_program
= {
91 .number
= NFS_ACL_PROGRAM
,
92 .nrvers
= ARRAY_SIZE(nfsacl_version
),
93 .version
= nfsacl_version
,
94 .stats
= &nfsacl_rpcstat
,
96 #endif /* CONFIG_NFS_V3_ACL */
98 struct nfs_client_initdata
{
100 const struct sockaddr
*addr
;
102 const struct nfs_rpc_ops
*rpc_ops
;
107 * Allocate a shared client record
109 * Since these are allocated/deallocated very rarely, we don't
110 * bother putting them in a slab cache...
112 static struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
114 struct nfs_client
*clp
;
115 struct rpc_cred
*cred
;
117 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
120 clp
->rpc_ops
= cl_init
->rpc_ops
;
122 if (cl_init
->rpc_ops
->version
== 4) {
123 if (nfs_callback_up() < 0)
125 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
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
) {
135 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
136 if (!clp
->cl_hostname
)
140 INIT_LIST_HEAD(&clp
->cl_superblocks
);
141 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
143 clp
->cl_proto
= cl_init
->proto
;
146 init_rwsem(&clp
->cl_sem
);
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
;
154 cred
= rpc_lookup_machine_cred();
156 clp
->cl_machine_cred
= cred
;
161 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
169 static void nfs4_shutdown_client(struct nfs_client
*clp
)
172 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
173 nfs4_kill_renewd(clp
);
174 BUG_ON(!RB_EMPTY_ROOT(&clp
->cl_state_owners
));
175 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
176 nfs_idmap_delete(clp
);
178 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
183 * Destroy a shared client record
185 static void nfs_free_client(struct nfs_client
*clp
)
187 dprintk("--> nfs_free_client(%u)\n", clp
->rpc_ops
->version
);
189 nfs4_shutdown_client(clp
);
191 /* -EIO all pending I/O */
192 if (!IS_ERR(clp
->cl_rpcclient
))
193 rpc_shutdown_client(clp
->cl_rpcclient
);
195 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
198 if (clp
->cl_machine_cred
!= NULL
)
199 put_rpccred(clp
->cl_machine_cred
);
201 kfree(clp
->cl_hostname
);
204 dprintk("<-- nfs_free_client()\n");
208 * Release a reference to a shared client record
210 void nfs_put_client(struct nfs_client
*clp
)
215 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
217 if (atomic_dec_and_lock(&clp
->cl_count
, &nfs_client_lock
)) {
218 list_del(&clp
->cl_share_link
);
219 spin_unlock(&nfs_client_lock
);
221 BUG_ON(!list_empty(&clp
->cl_superblocks
));
223 nfs_free_client(clp
);
227 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in
*sa1
,
228 const struct sockaddr_in
*sa2
)
230 return sa1
->sin_addr
.s_addr
== sa2
->sin_addr
.s_addr
;
233 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr_in6
*sa1
,
234 const struct sockaddr_in6
*sa2
)
236 return ipv6_addr_equal(&sa1
->sin6_addr
, &sa2
->sin6_addr
);
239 static int nfs_sockaddr_match_ipaddr(const struct sockaddr
*sa1
,
240 const struct sockaddr
*sa2
)
242 switch (sa1
->sa_family
) {
244 return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in
*)sa1
,
245 (const struct sockaddr_in
*)sa2
);
247 return nfs_sockaddr_match_ipaddr6((const struct sockaddr_in6
*)sa1
,
248 (const struct sockaddr_in6
*)sa2
);
254 * Find a client by IP address and protocol version
255 * - returns NULL if no such client
257 struct nfs_client
*nfs_find_client(const struct sockaddr
*addr
, u32 nfsversion
)
259 struct nfs_client
*clp
;
261 spin_lock(&nfs_client_lock
);
262 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
263 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
265 /* Don't match clients that failed to initialise properly */
266 if (clp
->cl_cons_state
!= NFS_CS_READY
)
269 /* Different NFS versions cannot share the same nfs_client */
270 if (clp
->rpc_ops
->version
!= nfsversion
)
273 if (addr
->sa_family
!= clap
->sa_family
)
275 /* Match only the IP address, not the port number */
276 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
279 atomic_inc(&clp
->cl_count
);
280 spin_unlock(&nfs_client_lock
);
283 spin_unlock(&nfs_client_lock
);
288 * Find a client by IP address and protocol version
289 * - returns NULL if no such client
291 struct nfs_client
*nfs_find_client_next(struct nfs_client
*clp
)
293 struct sockaddr
*sap
= (struct sockaddr
*)&clp
->cl_addr
;
294 u32 nfsvers
= clp
->rpc_ops
->version
;
296 spin_lock(&nfs_client_lock
);
297 list_for_each_entry_continue(clp
, &nfs_client_list
, cl_share_link
) {
298 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
300 /* Don't match clients that failed to initialise properly */
301 if (clp
->cl_cons_state
!= NFS_CS_READY
)
304 /* Different NFS versions cannot share the same nfs_client */
305 if (clp
->rpc_ops
->version
!= nfsvers
)
308 if (sap
->sa_family
!= clap
->sa_family
)
310 /* Match only the IP address, not the port number */
311 if (!nfs_sockaddr_match_ipaddr(sap
, clap
))
314 atomic_inc(&clp
->cl_count
);
315 spin_unlock(&nfs_client_lock
);
318 spin_unlock(&nfs_client_lock
);
323 * Find an nfs_client on the list that matches the initialisation data
326 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
328 struct nfs_client
*clp
;
330 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
331 /* Don't match clients that failed to initialise properly */
332 if (clp
->cl_cons_state
< 0)
335 /* Different NFS versions cannot share the same nfs_client */
336 if (clp
->rpc_ops
!= data
->rpc_ops
)
339 if (clp
->cl_proto
!= data
->proto
)
342 /* Match the full socket address */
343 if (memcmp(&clp
->cl_addr
, data
->addr
, sizeof(clp
->cl_addr
)) != 0)
346 atomic_inc(&clp
->cl_count
);
353 * Look up a client by IP address and protocol version
354 * - creates a new record if one doesn't yet exist
356 static struct nfs_client
*nfs_get_client(const struct nfs_client_initdata
*cl_init
)
358 struct nfs_client
*clp
, *new = NULL
;
361 dprintk("--> nfs_get_client(%s,v%u)\n",
362 cl_init
->hostname
?: "", cl_init
->rpc_ops
->version
);
364 /* see if the client already exists */
366 spin_lock(&nfs_client_lock
);
368 clp
= nfs_match_client(cl_init
);
374 spin_unlock(&nfs_client_lock
);
376 new = nfs_alloc_client(cl_init
);
379 return ERR_PTR(-ENOMEM
);
381 /* install a new client and return with it unready */
384 list_add(&clp
->cl_share_link
, &nfs_client_list
);
385 spin_unlock(&nfs_client_lock
);
386 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
389 /* found an existing client
390 * - make sure it's ready before returning
393 spin_unlock(&nfs_client_lock
);
396 nfs_free_client(new);
398 error
= wait_event_killable(nfs_client_active_wq
,
399 clp
->cl_cons_state
!= NFS_CS_INITING
);
402 return ERR_PTR(-ERESTARTSYS
);
405 if (clp
->cl_cons_state
< NFS_CS_READY
) {
406 error
= clp
->cl_cons_state
;
408 return ERR_PTR(error
);
411 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
413 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
418 * Mark a server as ready or failed
420 static void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
422 clp
->cl_cons_state
= state
;
423 wake_up_all(&nfs_client_active_wq
);
427 * Initialise the timeout values for a connection
429 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
430 unsigned int timeo
, unsigned int retrans
)
432 to
->to_initval
= timeo
* HZ
/ 10;
433 to
->to_retries
= retrans
;
438 case XPRT_TRANSPORT_TCP
:
439 case XPRT_TRANSPORT_RDMA
:
440 if (to
->to_initval
== 0)
441 to
->to_initval
= 60 * HZ
;
442 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
443 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
444 to
->to_increment
= to
->to_initval
;
445 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
446 if (to
->to_maxval
> NFS_MAX_TCP_TIMEOUT
)
447 to
->to_maxval
= NFS_MAX_TCP_TIMEOUT
;
448 if (to
->to_maxval
< to
->to_initval
)
449 to
->to_maxval
= to
->to_initval
;
450 to
->to_exponential
= 0;
452 case XPRT_TRANSPORT_UDP
:
455 to
->to_initval
= 11 * HZ
/ 10;
456 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
457 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
458 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
459 to
->to_exponential
= 1;
465 * Create an RPC client handle
467 static int nfs_create_rpc_client(struct nfs_client
*clp
,
468 const struct rpc_timeout
*timeparms
,
469 rpc_authflavor_t flavor
,
472 struct rpc_clnt
*clnt
= NULL
;
473 struct rpc_create_args args
= {
474 .protocol
= clp
->cl_proto
,
475 .address
= (struct sockaddr
*)&clp
->cl_addr
,
476 .addrsize
= clp
->cl_addrlen
,
477 .timeout
= timeparms
,
478 .servername
= clp
->cl_hostname
,
479 .program
= &nfs_program
,
480 .version
= clp
->rpc_ops
->version
,
481 .authflavor
= flavor
,
485 if (!IS_ERR(clp
->cl_rpcclient
))
488 clnt
= rpc_create(&args
);
490 dprintk("%s: cannot create RPC client. Error = %ld\n",
491 __func__
, PTR_ERR(clnt
));
492 return PTR_ERR(clnt
);
495 clp
->cl_rpcclient
= clnt
;
500 * Version 2 or 3 client destruction
502 static void nfs_destroy_server(struct nfs_server
*server
)
504 if (!(server
->flags
& NFS_MOUNT_NONLM
))
505 nlmclnt_done(server
->nlm_host
);
509 * Version 2 or 3 lockd setup
511 static int nfs_start_lockd(struct nfs_server
*server
)
513 struct nlm_host
*host
;
514 struct nfs_client
*clp
= server
->nfs_client
;
515 struct nlmclnt_initdata nlm_init
= {
516 .hostname
= clp
->cl_hostname
,
517 .address
= (struct sockaddr
*)&clp
->cl_addr
,
518 .addrlen
= clp
->cl_addrlen
,
519 .protocol
= server
->flags
& NFS_MOUNT_TCP
?
520 IPPROTO_TCP
: IPPROTO_UDP
,
521 .nfs_version
= clp
->rpc_ops
->version
,
524 if (nlm_init
.nfs_version
> 3)
526 if (server
->flags
& NFS_MOUNT_NONLM
)
529 host
= nlmclnt_init(&nlm_init
);
531 return PTR_ERR(host
);
533 server
->nlm_host
= host
;
534 server
->destroy
= nfs_destroy_server
;
539 * Initialise an NFSv3 ACL client connection
541 #ifdef CONFIG_NFS_V3_ACL
542 static void nfs_init_server_aclclient(struct nfs_server
*server
)
544 if (server
->nfs_client
->rpc_ops
->version
!= 3)
546 if (server
->flags
& NFS_MOUNT_NOACL
)
549 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
550 if (IS_ERR(server
->client_acl
))
553 /* No errors! Assume that Sun nfsacls are supported */
554 server
->caps
|= NFS_CAP_ACLS
;
558 server
->caps
&= ~NFS_CAP_ACLS
;
561 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
563 server
->flags
&= ~NFS_MOUNT_NOACL
;
564 server
->caps
&= ~NFS_CAP_ACLS
;
569 * Create a general RPC client
571 static int nfs_init_server_rpcclient(struct nfs_server
*server
,
572 const struct rpc_timeout
*timeo
,
573 rpc_authflavor_t pseudoflavour
)
575 struct nfs_client
*clp
= server
->nfs_client
;
577 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
578 if (IS_ERR(server
->client
)) {
579 dprintk("%s: couldn't create rpc_client!\n", __func__
);
580 return PTR_ERR(server
->client
);
583 memcpy(&server
->client
->cl_timeout_default
,
585 sizeof(server
->client
->cl_timeout_default
));
586 server
->client
->cl_timeout
= &server
->client
->cl_timeout_default
;
588 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
589 struct rpc_auth
*auth
;
591 auth
= rpcauth_create(pseudoflavour
, server
->client
);
593 dprintk("%s: couldn't create credcache!\n", __func__
);
594 return PTR_ERR(auth
);
597 server
->client
->cl_softrtry
= 0;
598 if (server
->flags
& NFS_MOUNT_SOFT
)
599 server
->client
->cl_softrtry
= 1;
605 * Initialise an NFS2 or NFS3 client
607 static int nfs_init_client(struct nfs_client
*clp
,
608 const struct rpc_timeout
*timeparms
,
609 const struct nfs_parsed_mount_data
*data
)
613 if (clp
->cl_cons_state
== NFS_CS_READY
) {
614 /* the client is already initialised */
615 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
620 * Create a client RPC handle for doing FSSTAT with UNIX auth only
621 * - RFC 2623, sec 2.3.2
623 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
, 0);
626 nfs_mark_client_ready(clp
, NFS_CS_READY
);
630 nfs_mark_client_ready(clp
, error
);
631 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
636 * Create a version 2 or 3 client
638 static int nfs_init_server(struct nfs_server
*server
,
639 const struct nfs_parsed_mount_data
*data
)
641 struct nfs_client_initdata cl_init
= {
642 .hostname
= data
->nfs_server
.hostname
,
643 .addr
= (const struct sockaddr
*)&data
->nfs_server
.address
,
644 .addrlen
= data
->nfs_server
.addrlen
,
645 .rpc_ops
= &nfs_v2_clientops
,
646 .proto
= data
->nfs_server
.protocol
,
648 struct rpc_timeout timeparms
;
649 struct nfs_client
*clp
;
652 dprintk("--> nfs_init_server()\n");
655 if (data
->flags
& NFS_MOUNT_VER3
)
656 cl_init
.rpc_ops
= &nfs_v3_clientops
;
659 /* Allocate or find a client reference we can use */
660 clp
= nfs_get_client(&cl_init
);
662 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
666 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
667 data
->timeo
, data
->retrans
);
668 error
= nfs_init_client(clp
, &timeparms
, data
);
672 server
->nfs_client
= clp
;
674 /* Initialise the client representation from the mount data */
675 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
678 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
680 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
682 server
->acregmin
= data
->acregmin
* HZ
;
683 server
->acregmax
= data
->acregmax
* HZ
;
684 server
->acdirmin
= data
->acdirmin
* HZ
;
685 server
->acdirmax
= data
->acdirmax
* HZ
;
687 /* Start lockd here, before we might error out */
688 error
= nfs_start_lockd(server
);
692 server
->port
= data
->nfs_server
.port
;
694 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
698 /* Preserve the values of mount_server-related mount options */
699 if (data
->mount_server
.addrlen
) {
700 memcpy(&server
->mountd_address
, &data
->mount_server
.address
,
701 data
->mount_server
.addrlen
);
702 server
->mountd_addrlen
= data
->mount_server
.addrlen
;
704 server
->mountd_version
= data
->mount_server
.version
;
705 server
->mountd_port
= data
->mount_server
.port
;
706 server
->mountd_protocol
= data
->mount_server
.protocol
;
708 server
->namelen
= data
->namlen
;
709 /* Create a client RPC handle for the NFSv3 ACL management interface */
710 nfs_init_server_aclclient(server
);
711 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
715 server
->nfs_client
= NULL
;
717 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
722 * Load up the server record from information gained in an fsinfo record
724 static void nfs_server_set_fsinfo(struct nfs_server
*server
, struct nfs_fsinfo
*fsinfo
)
726 unsigned long max_rpc_payload
;
728 /* Work out a lot of parameters */
729 if (server
->rsize
== 0)
730 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
731 if (server
->wsize
== 0)
732 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
734 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
735 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
736 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
737 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
739 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
740 if (server
->rsize
> max_rpc_payload
)
741 server
->rsize
= max_rpc_payload
;
742 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
743 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
744 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
746 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
748 if (server
->wsize
> max_rpc_payload
)
749 server
->wsize
= max_rpc_payload
;
750 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
751 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
752 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
753 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
755 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
756 if (server
->dtsize
> PAGE_CACHE_SIZE
)
757 server
->dtsize
= PAGE_CACHE_SIZE
;
758 if (server
->dtsize
> server
->rsize
)
759 server
->dtsize
= server
->rsize
;
761 if (server
->flags
& NFS_MOUNT_NOAC
) {
762 server
->acregmin
= server
->acregmax
= 0;
763 server
->acdirmin
= server
->acdirmax
= 0;
766 server
->maxfilesize
= fsinfo
->maxfilesize
;
768 /* We're airborne Set socket buffersize */
769 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
773 * Probe filesystem information, including the FSID on v2/v3
775 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
777 struct nfs_fsinfo fsinfo
;
778 struct nfs_client
*clp
= server
->nfs_client
;
781 dprintk("--> nfs_probe_fsinfo()\n");
783 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
784 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
789 fsinfo
.fattr
= fattr
;
790 nfs_fattr_init(fattr
);
791 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
795 nfs_server_set_fsinfo(server
, &fsinfo
);
796 error
= bdi_init(&server
->backing_dev_info
);
801 /* Get some general file system info */
802 if (server
->namelen
== 0) {
803 struct nfs_pathconf pathinfo
;
805 pathinfo
.fattr
= fattr
;
806 nfs_fattr_init(fattr
);
808 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
809 server
->namelen
= pathinfo
.max_namelen
;
812 dprintk("<-- nfs_probe_fsinfo() = 0\n");
816 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
821 * Copy useful information when duplicating a server record
823 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
825 target
->flags
= source
->flags
;
826 target
->acregmin
= source
->acregmin
;
827 target
->acregmax
= source
->acregmax
;
828 target
->acdirmin
= source
->acdirmin
;
829 target
->acdirmax
= source
->acdirmax
;
830 target
->caps
= source
->caps
;
834 * Allocate and initialise a server record
836 static struct nfs_server
*nfs_alloc_server(void)
838 struct nfs_server
*server
;
840 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
844 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
846 /* Zero out the NFS state stuff */
847 INIT_LIST_HEAD(&server
->client_link
);
848 INIT_LIST_HEAD(&server
->master_link
);
850 init_waitqueue_head(&server
->active_wq
);
851 atomic_set(&server
->active
, 0);
853 server
->io_stats
= nfs_alloc_iostats();
854 if (!server
->io_stats
) {
863 * Free up a server record
865 void nfs_free_server(struct nfs_server
*server
)
867 dprintk("--> nfs_free_server()\n");
869 spin_lock(&nfs_client_lock
);
870 list_del(&server
->client_link
);
871 list_del(&server
->master_link
);
872 spin_unlock(&nfs_client_lock
);
874 if (server
->destroy
!= NULL
)
875 server
->destroy(server
);
877 if (!IS_ERR(server
->client_acl
))
878 rpc_shutdown_client(server
->client_acl
);
879 if (!IS_ERR(server
->client
))
880 rpc_shutdown_client(server
->client
);
882 nfs_put_client(server
->nfs_client
);
884 nfs_free_iostats(server
->io_stats
);
885 bdi_destroy(&server
->backing_dev_info
);
887 nfs_release_automount_timer();
888 dprintk("<-- nfs_free_server()\n");
892 * Create a version 2 or 3 volume record
893 * - keyed on server and FSID
895 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
896 struct nfs_fh
*mntfh
)
898 struct nfs_server
*server
;
899 struct nfs_fattr fattr
;
902 server
= nfs_alloc_server();
904 return ERR_PTR(-ENOMEM
);
906 /* Get a client representation */
907 error
= nfs_init_server(server
, data
);
911 BUG_ON(!server
->nfs_client
);
912 BUG_ON(!server
->nfs_client
->rpc_ops
);
913 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
915 /* Probe the root fh to retrieve its FSID */
916 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
919 if (server
->nfs_client
->rpc_ops
->version
== 3) {
920 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
921 server
->namelen
= NFS3_MAXNAMLEN
;
922 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
923 server
->caps
|= NFS_CAP_READDIRPLUS
;
925 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
926 server
->namelen
= NFS2_MAXNAMLEN
;
929 if (!(fattr
.valid
& NFS_ATTR_FATTR
)) {
930 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, &fattr
);
932 dprintk("nfs_create_server: getattr error = %d\n", -error
);
936 memcpy(&server
->fsid
, &fattr
.fsid
, sizeof(server
->fsid
));
938 dprintk("Server FSID: %llx:%llx\n",
939 (unsigned long long) server
->fsid
.major
,
940 (unsigned long long) server
->fsid
.minor
);
942 BUG_ON(!server
->nfs_client
);
943 BUG_ON(!server
->nfs_client
->rpc_ops
);
944 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
946 spin_lock(&nfs_client_lock
);
947 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
948 list_add_tail(&server
->master_link
, &nfs_volume_list
);
949 spin_unlock(&nfs_client_lock
);
951 server
->mount_time
= jiffies
;
955 nfs_free_server(server
);
956 return ERR_PTR(error
);
961 * Initialise an NFS4 client record
963 static int nfs4_init_client(struct nfs_client
*clp
,
964 const struct rpc_timeout
*timeparms
,
966 rpc_authflavor_t authflavour
)
970 if (clp
->cl_cons_state
== NFS_CS_READY
) {
971 /* the client is initialised already */
972 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
976 /* Check NFS protocol revision and initialize RPC op vector */
977 clp
->rpc_ops
= &nfs_v4_clientops
;
979 error
= nfs_create_rpc_client(clp
, timeparms
, authflavour
,
980 RPC_CLNT_CREATE_DISCRTRY
);
983 memcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
985 error
= nfs_idmap_new(clp
);
987 dprintk("%s: failed to create idmapper. Error = %d\n",
991 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
993 nfs_mark_client_ready(clp
, NFS_CS_READY
);
997 nfs_mark_client_ready(clp
, error
);
998 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
1003 * Set up an NFS4 client
1005 static int nfs4_set_client(struct nfs_server
*server
,
1006 const char *hostname
,
1007 const struct sockaddr
*addr
,
1008 const size_t addrlen
,
1009 const char *ip_addr
,
1010 rpc_authflavor_t authflavour
,
1011 int proto
, const struct rpc_timeout
*timeparms
)
1013 struct nfs_client_initdata cl_init
= {
1014 .hostname
= hostname
,
1017 .rpc_ops
= &nfs_v4_clientops
,
1020 struct nfs_client
*clp
;
1023 dprintk("--> nfs4_set_client()\n");
1025 /* Allocate or find a client reference we can use */
1026 clp
= nfs_get_client(&cl_init
);
1028 error
= PTR_ERR(clp
);
1031 error
= nfs4_init_client(clp
, timeparms
, ip_addr
, authflavour
);
1035 server
->nfs_client
= clp
;
1036 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
1040 nfs_put_client(clp
);
1042 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
1047 * Create a version 4 volume record
1049 static int nfs4_init_server(struct nfs_server
*server
,
1050 const struct nfs_parsed_mount_data
*data
)
1052 struct rpc_timeout timeparms
;
1055 dprintk("--> nfs4_init_server()\n");
1057 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
1058 data
->timeo
, data
->retrans
);
1060 /* Get a client record */
1061 error
= nfs4_set_client(server
,
1062 data
->nfs_server
.hostname
,
1063 (const struct sockaddr
*)&data
->nfs_server
.address
,
1064 data
->nfs_server
.addrlen
,
1065 data
->client_address
,
1066 data
->auth_flavors
[0],
1067 data
->nfs_server
.protocol
,
1072 /* Initialise the client representation from the mount data */
1073 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
1074 server
->caps
|= NFS_CAP_ATOMIC_OPEN
;
1077 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1079 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1081 server
->acregmin
= data
->acregmin
* HZ
;
1082 server
->acregmax
= data
->acregmax
* HZ
;
1083 server
->acdirmin
= data
->acdirmin
* HZ
;
1084 server
->acdirmax
= data
->acdirmax
* HZ
;
1086 server
->port
= data
->nfs_server
.port
;
1088 error
= nfs_init_server_rpcclient(server
, &timeparms
, data
->auth_flavors
[0]);
1092 dprintk("<-- nfs4_init_server() = %d\n", error
);
1097 * Create a version 4 volume record
1098 * - keyed on server and FSID
1100 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
1101 struct nfs_fh
*mntfh
)
1103 struct nfs_fattr fattr
;
1104 struct nfs_server
*server
;
1107 dprintk("--> nfs4_create_server()\n");
1109 server
= nfs_alloc_server();
1111 return ERR_PTR(-ENOMEM
);
1113 /* set up the general RPC client */
1114 error
= nfs4_init_server(server
, data
);
1118 BUG_ON(!server
->nfs_client
);
1119 BUG_ON(!server
->nfs_client
->rpc_ops
);
1120 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1122 /* Probe the root fh to retrieve its FSID */
1123 error
= nfs4_path_walk(server
, mntfh
, data
->nfs_server
.export_path
);
1127 dprintk("Server FSID: %llx:%llx\n",
1128 (unsigned long long) server
->fsid
.major
,
1129 (unsigned long long) server
->fsid
.minor
);
1130 dprintk("Mount FH: %d\n", mntfh
->size
);
1132 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1136 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1137 server
->namelen
= NFS4_MAXNAMLEN
;
1139 BUG_ON(!server
->nfs_client
);
1140 BUG_ON(!server
->nfs_client
->rpc_ops
);
1141 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1143 spin_lock(&nfs_client_lock
);
1144 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1145 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1146 spin_unlock(&nfs_client_lock
);
1148 server
->mount_time
= jiffies
;
1149 dprintk("<-- nfs4_create_server() = %p\n", server
);
1153 nfs_free_server(server
);
1154 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1155 return ERR_PTR(error
);
1159 * Create an NFS4 referral server record
1161 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1162 struct nfs_fh
*mntfh
)
1164 struct nfs_client
*parent_client
;
1165 struct nfs_server
*server
, *parent_server
;
1166 struct nfs_fattr fattr
;
1169 dprintk("--> nfs4_create_referral_server()\n");
1171 server
= nfs_alloc_server();
1173 return ERR_PTR(-ENOMEM
);
1175 parent_server
= NFS_SB(data
->sb
);
1176 parent_client
= parent_server
->nfs_client
;
1178 /* Get a client representation.
1179 * Note: NFSv4 always uses TCP, */
1180 error
= nfs4_set_client(server
, data
->hostname
,
1183 parent_client
->cl_ipaddr
,
1185 parent_server
->client
->cl_xprt
->prot
,
1186 parent_server
->client
->cl_timeout
);
1190 /* Initialise the client representation from the parent server */
1191 nfs_server_copy_userdata(server
, parent_server
);
1192 server
->caps
|= NFS_CAP_ATOMIC_OPEN
;
1194 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1198 BUG_ON(!server
->nfs_client
);
1199 BUG_ON(!server
->nfs_client
->rpc_ops
);
1200 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1202 /* Probe the root fh to retrieve its FSID and filehandle */
1203 error
= nfs4_path_walk(server
, mntfh
, data
->mnt_path
);
1207 /* probe the filesystem info for this server filesystem */
1208 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1212 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1213 server
->namelen
= NFS4_MAXNAMLEN
;
1215 dprintk("Referral FSID: %llx:%llx\n",
1216 (unsigned long long) server
->fsid
.major
,
1217 (unsigned long long) server
->fsid
.minor
);
1219 spin_lock(&nfs_client_lock
);
1220 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1221 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1222 spin_unlock(&nfs_client_lock
);
1224 server
->mount_time
= jiffies
;
1226 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1230 nfs_free_server(server
);
1231 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1232 return ERR_PTR(error
);
1235 #endif /* CONFIG_NFS_V4 */
1238 * Clone an NFS2, NFS3 or NFS4 server record
1240 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1242 struct nfs_fattr
*fattr
)
1244 struct nfs_server
*server
;
1245 struct nfs_fattr fattr_fsinfo
;
1248 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1249 (unsigned long long) fattr
->fsid
.major
,
1250 (unsigned long long) fattr
->fsid
.minor
);
1252 server
= nfs_alloc_server();
1254 return ERR_PTR(-ENOMEM
);
1256 /* Copy data from the source */
1257 server
->nfs_client
= source
->nfs_client
;
1258 atomic_inc(&server
->nfs_client
->cl_count
);
1259 nfs_server_copy_userdata(server
, source
);
1261 server
->fsid
= fattr
->fsid
;
1263 error
= nfs_init_server_rpcclient(server
,
1264 source
->client
->cl_timeout
,
1265 source
->client
->cl_auth
->au_flavor
);
1267 goto out_free_server
;
1268 if (!IS_ERR(source
->client_acl
))
1269 nfs_init_server_aclclient(server
);
1271 /* probe the filesystem info for this server filesystem */
1272 error
= nfs_probe_fsinfo(server
, fh
, &fattr_fsinfo
);
1274 goto out_free_server
;
1276 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1277 server
->namelen
= NFS4_MAXNAMLEN
;
1279 dprintk("Cloned FSID: %llx:%llx\n",
1280 (unsigned long long) server
->fsid
.major
,
1281 (unsigned long long) server
->fsid
.minor
);
1283 error
= nfs_start_lockd(server
);
1285 goto out_free_server
;
1287 spin_lock(&nfs_client_lock
);
1288 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1289 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1290 spin_unlock(&nfs_client_lock
);
1292 server
->mount_time
= jiffies
;
1294 dprintk("<-- nfs_clone_server() = %p\n", server
);
1298 nfs_free_server(server
);
1299 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1300 return ERR_PTR(error
);
1303 #ifdef CONFIG_PROC_FS
1304 static struct proc_dir_entry
*proc_fs_nfs
;
1306 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1307 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1308 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1309 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1310 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1312 static struct seq_operations nfs_server_list_ops
= {
1313 .start
= nfs_server_list_start
,
1314 .next
= nfs_server_list_next
,
1315 .stop
= nfs_server_list_stop
,
1316 .show
= nfs_server_list_show
,
1319 static const struct file_operations nfs_server_list_fops
= {
1320 .open
= nfs_server_list_open
,
1322 .llseek
= seq_lseek
,
1323 .release
= seq_release
,
1324 .owner
= THIS_MODULE
,
1327 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1328 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1329 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1330 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1331 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1333 static struct seq_operations nfs_volume_list_ops
= {
1334 .start
= nfs_volume_list_start
,
1335 .next
= nfs_volume_list_next
,
1336 .stop
= nfs_volume_list_stop
,
1337 .show
= nfs_volume_list_show
,
1340 static const struct file_operations nfs_volume_list_fops
= {
1341 .open
= nfs_volume_list_open
,
1343 .llseek
= seq_lseek
,
1344 .release
= seq_release
,
1345 .owner
= THIS_MODULE
,
1349 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1352 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1357 ret
= seq_open(file
, &nfs_server_list_ops
);
1361 m
= file
->private_data
;
1362 m
->private = PDE(inode
)->data
;
1368 * set up the iterator to start reading from the server list and return the first item
1370 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1372 /* lock the list against modification */
1373 spin_lock(&nfs_client_lock
);
1374 return seq_list_start_head(&nfs_client_list
, *_pos
);
1378 * move to next server
1380 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1382 return seq_list_next(v
, &nfs_client_list
, pos
);
1386 * clean up after reading from the transports list
1388 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1390 spin_unlock(&nfs_client_lock
);
1394 * display a header line followed by a load of call lines
1396 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1398 struct nfs_client
*clp
;
1400 /* display header on line 1 */
1401 if (v
== &nfs_client_list
) {
1402 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1406 /* display one transport per line on subsequent lines */
1407 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1409 seq_printf(m
, "v%u %s %s %3d %s\n",
1410 clp
->rpc_ops
->version
,
1411 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1412 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1413 atomic_read(&clp
->cl_count
),
1420 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1422 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1427 ret
= seq_open(file
, &nfs_volume_list_ops
);
1431 m
= file
->private_data
;
1432 m
->private = PDE(inode
)->data
;
1438 * set up the iterator to start reading from the volume list and return the first item
1440 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1442 /* lock the list against modification */
1443 spin_lock(&nfs_client_lock
);
1444 return seq_list_start_head(&nfs_volume_list
, *_pos
);
1448 * move to next volume
1450 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1452 return seq_list_next(v
, &nfs_volume_list
, pos
);
1456 * clean up after reading from the transports list
1458 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1460 spin_unlock(&nfs_client_lock
);
1464 * display a header line followed by a load of call lines
1466 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1468 struct nfs_server
*server
;
1469 struct nfs_client
*clp
;
1470 char dev
[8], fsid
[17];
1472 /* display header on line 1 */
1473 if (v
== &nfs_volume_list
) {
1474 seq_puts(m
, "NV SERVER PORT DEV FSID\n");
1477 /* display one transport per line on subsequent lines */
1478 server
= list_entry(v
, struct nfs_server
, master_link
);
1479 clp
= server
->nfs_client
;
1481 snprintf(dev
, 8, "%u:%u",
1482 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1484 snprintf(fsid
, 17, "%llx:%llx",
1485 (unsigned long long) server
->fsid
.major
,
1486 (unsigned long long) server
->fsid
.minor
);
1488 seq_printf(m
, "v%u %s %s %-7s %-17s\n",
1489 clp
->rpc_ops
->version
,
1490 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_ADDR
),
1491 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_HEX_PORT
),
1499 * initialise the /proc/fs/nfsfs/ directory
1501 int __init
nfs_fs_proc_init(void)
1503 struct proc_dir_entry
*p
;
1505 proc_fs_nfs
= proc_mkdir("fs/nfsfs", NULL
);
1509 proc_fs_nfs
->owner
= THIS_MODULE
;
1511 /* a file of servers with which we're dealing */
1512 p
= proc_create("servers", S_IFREG
|S_IRUGO
,
1513 proc_fs_nfs
, &nfs_server_list_fops
);
1517 /* a file of volumes that we have mounted */
1518 p
= proc_create("volumes", S_IFREG
|S_IRUGO
,
1519 proc_fs_nfs
, &nfs_volume_list_fops
);
1525 remove_proc_entry("servers", proc_fs_nfs
);
1527 remove_proc_entry("fs/nfsfs", NULL
);
1533 * clean up the /proc/fs/nfsfs/ directory
1535 void nfs_fs_proc_exit(void)
1537 remove_proc_entry("volumes", proc_fs_nfs
);
1538 remove_proc_entry("servers", proc_fs_nfs
);
1539 remove_proc_entry("fs/nfsfs", NULL
);
1542 #endif /* CONFIG_PROC_FS */