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/nfs_xdr.h>
39 #include <asm/system.h>
43 #include "delegation.h"
47 #define NFSDBG_FACILITY NFSDBG_CLIENT
49 static DEFINE_SPINLOCK(nfs_client_lock
);
50 static LIST_HEAD(nfs_client_list
);
51 static LIST_HEAD(nfs_volume_list
);
52 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq
);
57 static struct rpc_version
*nfs_version
[5] = {
67 struct rpc_program nfs_program
= {
69 .number
= NFS_PROGRAM
,
70 .nrvers
= ARRAY_SIZE(nfs_version
),
71 .version
= nfs_version
,
72 .stats
= &nfs_rpcstat
,
73 .pipe_dir_name
= "/nfs",
76 struct rpc_stat nfs_rpcstat
= {
77 .program
= &nfs_program
81 #ifdef CONFIG_NFS_V3_ACL
82 static struct rpc_stat nfsacl_rpcstat
= { &nfsacl_program
};
83 static struct rpc_version
* nfsacl_version
[] = {
84 [3] = &nfsacl_version3
,
87 struct rpc_program nfsacl_program
= {
89 .number
= NFS_ACL_PROGRAM
,
90 .nrvers
= ARRAY_SIZE(nfsacl_version
),
91 .version
= nfsacl_version
,
92 .stats
= &nfsacl_rpcstat
,
94 #endif /* CONFIG_NFS_V3_ACL */
96 struct nfs_client_initdata
{
98 const struct sockaddr_in
*addr
;
103 * Allocate a shared client record
105 * Since these are allocated/deallocated very rarely, we don't
106 * bother putting them in a slab cache...
108 static struct nfs_client
*nfs_alloc_client(const struct nfs_client_initdata
*cl_init
)
110 struct nfs_client
*clp
;
112 if ((clp
= kzalloc(sizeof(*clp
), GFP_KERNEL
)) == NULL
)
115 if (cl_init
->version
== 4) {
116 if (nfs_callback_up() < 0)
118 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
121 atomic_set(&clp
->cl_count
, 1);
122 clp
->cl_cons_state
= NFS_CS_INITING
;
124 clp
->cl_nfsversion
= cl_init
->version
;
125 memcpy(&clp
->cl_addr
, cl_init
->addr
, sizeof(clp
->cl_addr
));
127 if (cl_init
->hostname
) {
128 clp
->cl_hostname
= kstrdup(cl_init
->hostname
, GFP_KERNEL
);
129 if (!clp
->cl_hostname
)
133 INIT_LIST_HEAD(&clp
->cl_superblocks
);
134 clp
->cl_rpcclient
= ERR_PTR(-EINVAL
);
137 init_rwsem(&clp
->cl_sem
);
138 INIT_LIST_HEAD(&clp
->cl_delegations
);
139 spin_lock_init(&clp
->cl_lock
);
140 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
141 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
142 clp
->cl_boot_time
= CURRENT_TIME
;
143 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
149 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
157 static void nfs4_shutdown_client(struct nfs_client
*clp
)
160 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
161 nfs4_kill_renewd(clp
);
162 BUG_ON(!RB_EMPTY_ROOT(&clp
->cl_state_owners
));
163 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
164 nfs_idmap_delete(clp
);
169 * Destroy a shared client record
171 static void nfs_free_client(struct nfs_client
*clp
)
173 dprintk("--> nfs_free_client(%d)\n", clp
->cl_nfsversion
);
175 nfs4_shutdown_client(clp
);
177 /* -EIO all pending I/O */
178 if (!IS_ERR(clp
->cl_rpcclient
))
179 rpc_shutdown_client(clp
->cl_rpcclient
);
181 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
184 kfree(clp
->cl_hostname
);
187 dprintk("<-- nfs_free_client()\n");
191 * Release a reference to a shared client record
193 void nfs_put_client(struct nfs_client
*clp
)
198 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp
->cl_count
));
200 if (atomic_dec_and_lock(&clp
->cl_count
, &nfs_client_lock
)) {
201 list_del(&clp
->cl_share_link
);
202 spin_unlock(&nfs_client_lock
);
204 BUG_ON(!list_empty(&clp
->cl_superblocks
));
206 nfs_free_client(clp
);
211 * Find a client by IP address and protocol version
212 * - returns NULL if no such client
214 struct nfs_client
*nfs_find_client(const struct sockaddr_in
*addr
, int nfsversion
)
216 struct nfs_client
*clp
;
218 spin_lock(&nfs_client_lock
);
219 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
220 /* Don't match clients that failed to initialise properly */
221 if (clp
->cl_cons_state
!= NFS_CS_READY
)
224 /* Different NFS versions cannot share the same nfs_client */
225 if (clp
->cl_nfsversion
!= nfsversion
)
228 /* Match only the IP address, not the port number */
229 if (clp
->cl_addr
.sin_addr
.s_addr
!= addr
->sin_addr
.s_addr
)
232 atomic_inc(&clp
->cl_count
);
233 spin_unlock(&nfs_client_lock
);
236 spin_unlock(&nfs_client_lock
);
241 * Find an nfs_client on the list that matches the initialisation data
244 static struct nfs_client
*nfs_match_client(const struct nfs_client_initdata
*data
)
246 struct nfs_client
*clp
;
248 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
249 /* Don't match clients that failed to initialise properly */
250 if (clp
->cl_cons_state
< 0)
253 /* Different NFS versions cannot share the same nfs_client */
254 if (clp
->cl_nfsversion
!= data
->version
)
257 /* Match the full socket address */
258 if (memcmp(&clp
->cl_addr
, data
->addr
, sizeof(clp
->cl_addr
)) != 0)
261 atomic_inc(&clp
->cl_count
);
268 * Look up a client by IP address and protocol version
269 * - creates a new record if one doesn't yet exist
271 static struct nfs_client
*nfs_get_client(const struct nfs_client_initdata
*cl_init
)
273 struct nfs_client
*clp
, *new = NULL
;
276 dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT
":%d,%d)\n",
277 cl_init
->hostname
?: "", NIPQUAD(cl_init
->addr
->sin_addr
),
278 cl_init
->addr
->sin_port
, cl_init
->version
);
280 /* see if the client already exists */
282 spin_lock(&nfs_client_lock
);
284 clp
= nfs_match_client(cl_init
);
290 spin_unlock(&nfs_client_lock
);
292 new = nfs_alloc_client(cl_init
);
295 return ERR_PTR(-ENOMEM
);
297 /* install a new client and return with it unready */
300 list_add(&clp
->cl_share_link
, &nfs_client_list
);
301 spin_unlock(&nfs_client_lock
);
302 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
305 /* found an existing client
306 * - make sure it's ready before returning
309 spin_unlock(&nfs_client_lock
);
312 nfs_free_client(new);
314 error
= wait_event_interruptible(nfs_client_active_wq
,
315 clp
->cl_cons_state
!= NFS_CS_INITING
);
318 return ERR_PTR(-ERESTARTSYS
);
321 if (clp
->cl_cons_state
< NFS_CS_READY
) {
322 error
= clp
->cl_cons_state
;
324 return ERR_PTR(error
);
327 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
329 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
334 * Mark a server as ready or failed
336 static void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
338 clp
->cl_cons_state
= state
;
339 wake_up_all(&nfs_client_active_wq
);
343 * Initialise the timeout values for a connection
345 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
346 unsigned int timeo
, unsigned int retrans
)
348 to
->to_initval
= timeo
* HZ
/ 10;
349 to
->to_retries
= retrans
;
354 case XPRT_TRANSPORT_TCP
:
355 case XPRT_TRANSPORT_RDMA
:
357 to
->to_initval
= 60 * HZ
;
358 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
359 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
360 to
->to_increment
= to
->to_initval
;
361 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
362 to
->to_exponential
= 0;
364 case XPRT_TRANSPORT_UDP
:
367 to
->to_initval
= 11 * HZ
/ 10;
368 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
369 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
370 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
371 to
->to_exponential
= 1;
377 * Create an RPC client handle
379 static int nfs_create_rpc_client(struct nfs_client
*clp
, int proto
,
381 unsigned int retrans
,
382 rpc_authflavor_t flavor
,
385 struct rpc_timeout timeparms
;
386 struct rpc_clnt
*clnt
= NULL
;
387 struct rpc_create_args args
= {
389 .address
= (struct sockaddr
*)&clp
->cl_addr
,
390 .addrsize
= sizeof(clp
->cl_addr
),
391 .timeout
= &timeparms
,
392 .servername
= clp
->cl_hostname
,
393 .program
= &nfs_program
,
394 .version
= clp
->rpc_ops
->version
,
395 .authflavor
= flavor
,
399 if (!IS_ERR(clp
->cl_rpcclient
))
402 nfs_init_timeout_values(&timeparms
, proto
, timeo
, retrans
);
403 clp
->retrans_timeo
= timeparms
.to_initval
;
404 clp
->retrans_count
= timeparms
.to_retries
;
406 clnt
= rpc_create(&args
);
408 dprintk("%s: cannot create RPC client. Error = %ld\n",
409 __FUNCTION__
, PTR_ERR(clnt
));
410 return PTR_ERR(clnt
);
413 clp
->cl_rpcclient
= clnt
;
418 * Version 2 or 3 client destruction
420 static void nfs_destroy_server(struct nfs_server
*server
)
422 if (!(server
->flags
& NFS_MOUNT_NONLM
))
423 lockd_down(); /* release rpc.lockd */
427 * Version 2 or 3 lockd setup
429 static int nfs_start_lockd(struct nfs_server
*server
)
433 if (server
->nfs_client
->cl_nfsversion
> 3)
435 if (server
->flags
& NFS_MOUNT_NONLM
)
437 error
= lockd_up((server
->flags
& NFS_MOUNT_TCP
) ?
438 IPPROTO_TCP
: IPPROTO_UDP
);
440 server
->flags
|= NFS_MOUNT_NONLM
;
442 server
->destroy
= nfs_destroy_server
;
448 * Initialise an NFSv3 ACL client connection
450 #ifdef CONFIG_NFS_V3_ACL
451 static void nfs_init_server_aclclient(struct nfs_server
*server
)
453 if (server
->nfs_client
->cl_nfsversion
!= 3)
455 if (server
->flags
& NFS_MOUNT_NOACL
)
458 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
459 if (IS_ERR(server
->client_acl
))
462 /* No errors! Assume that Sun nfsacls are supported */
463 server
->caps
|= NFS_CAP_ACLS
;
467 server
->caps
&= ~NFS_CAP_ACLS
;
470 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
472 server
->flags
&= ~NFS_MOUNT_NOACL
;
473 server
->caps
&= ~NFS_CAP_ACLS
;
478 * Create a general RPC client
480 static int nfs_init_server_rpcclient(struct nfs_server
*server
, rpc_authflavor_t pseudoflavour
)
482 struct nfs_client
*clp
= server
->nfs_client
;
484 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
485 if (IS_ERR(server
->client
)) {
486 dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__
);
487 return PTR_ERR(server
->client
);
490 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
491 struct rpc_auth
*auth
;
493 auth
= rpcauth_create(pseudoflavour
, server
->client
);
495 dprintk("%s: couldn't create credcache!\n", __FUNCTION__
);
496 return PTR_ERR(auth
);
499 server
->client
->cl_softrtry
= 0;
500 if (server
->flags
& NFS_MOUNT_SOFT
)
501 server
->client
->cl_softrtry
= 1;
503 server
->client
->cl_intr
= 0;
504 if (server
->flags
& NFS4_MOUNT_INTR
)
505 server
->client
->cl_intr
= 1;
511 * Initialise an NFS2 or NFS3 client
513 static int nfs_init_client(struct nfs_client
*clp
,
514 const struct nfs_parsed_mount_data
*data
)
518 if (clp
->cl_cons_state
== NFS_CS_READY
) {
519 /* the client is already initialised */
520 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
524 /* Check NFS protocol revision and initialize RPC op vector */
525 clp
->rpc_ops
= &nfs_v2_clientops
;
527 if (clp
->cl_nfsversion
== 3)
528 clp
->rpc_ops
= &nfs_v3_clientops
;
531 * Create a client RPC handle for doing FSSTAT with UNIX auth only
532 * - RFC 2623, sec 2.3.2
534 error
= nfs_create_rpc_client(clp
, data
->nfs_server
.protocol
,
535 data
->timeo
, data
->retrans
, RPC_AUTH_UNIX
, 0);
538 nfs_mark_client_ready(clp
, NFS_CS_READY
);
542 nfs_mark_client_ready(clp
, error
);
543 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
548 * Create a version 2 or 3 client
550 static int nfs_init_server(struct nfs_server
*server
,
551 const struct nfs_parsed_mount_data
*data
)
553 struct nfs_client_initdata cl_init
= {
554 .hostname
= data
->nfs_server
.hostname
,
555 .addr
= &data
->nfs_server
.address
,
558 struct nfs_client
*clp
;
561 dprintk("--> nfs_init_server()\n");
564 if (data
->flags
& NFS_MOUNT_VER3
)
568 /* Allocate or find a client reference we can use */
569 clp
= nfs_get_client(&cl_init
);
571 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
575 error
= nfs_init_client(clp
, data
);
579 server
->nfs_client
= clp
;
581 /* Initialise the client representation from the mount data */
582 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
585 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
587 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
589 server
->acregmin
= data
->acregmin
* HZ
;
590 server
->acregmax
= data
->acregmax
* HZ
;
591 server
->acdirmin
= data
->acdirmin
* HZ
;
592 server
->acdirmax
= data
->acdirmax
* HZ
;
594 /* Start lockd here, before we might error out */
595 error
= nfs_start_lockd(server
);
599 error
= nfs_init_server_rpcclient(server
, data
->auth_flavors
[0]);
603 server
->namelen
= data
->namlen
;
604 /* Create a client RPC handle for the NFSv3 ACL management interface */
605 nfs_init_server_aclclient(server
);
606 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
610 server
->nfs_client
= NULL
;
612 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
617 * Load up the server record from information gained in an fsinfo record
619 static void nfs_server_set_fsinfo(struct nfs_server
*server
, struct nfs_fsinfo
*fsinfo
)
621 unsigned long max_rpc_payload
;
623 /* Work out a lot of parameters */
624 if (server
->rsize
== 0)
625 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
626 if (server
->wsize
== 0)
627 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
629 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
630 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
631 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
632 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
634 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
635 if (server
->rsize
> max_rpc_payload
)
636 server
->rsize
= max_rpc_payload
;
637 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
638 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
639 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
641 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
643 if (server
->wsize
> max_rpc_payload
)
644 server
->wsize
= max_rpc_payload
;
645 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
646 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
647 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
648 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
650 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
651 if (server
->dtsize
> PAGE_CACHE_SIZE
)
652 server
->dtsize
= PAGE_CACHE_SIZE
;
653 if (server
->dtsize
> server
->rsize
)
654 server
->dtsize
= server
->rsize
;
656 if (server
->flags
& NFS_MOUNT_NOAC
) {
657 server
->acregmin
= server
->acregmax
= 0;
658 server
->acdirmin
= server
->acdirmax
= 0;
661 server
->maxfilesize
= fsinfo
->maxfilesize
;
663 /* We're airborne Set socket buffersize */
664 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
668 * Probe filesystem information, including the FSID on v2/v3
670 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
672 struct nfs_fsinfo fsinfo
;
673 struct nfs_client
*clp
= server
->nfs_client
;
676 dprintk("--> nfs_probe_fsinfo()\n");
678 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
679 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
684 fsinfo
.fattr
= fattr
;
685 nfs_fattr_init(fattr
);
686 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
690 nfs_server_set_fsinfo(server
, &fsinfo
);
691 error
= bdi_init(&server
->backing_dev_info
);
696 /* Get some general file system info */
697 if (server
->namelen
== 0) {
698 struct nfs_pathconf pathinfo
;
700 pathinfo
.fattr
= fattr
;
701 nfs_fattr_init(fattr
);
703 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
704 server
->namelen
= pathinfo
.max_namelen
;
707 dprintk("<-- nfs_probe_fsinfo() = 0\n");
711 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
716 * Copy useful information when duplicating a server record
718 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
720 target
->flags
= source
->flags
;
721 target
->acregmin
= source
->acregmin
;
722 target
->acregmax
= source
->acregmax
;
723 target
->acdirmin
= source
->acdirmin
;
724 target
->acdirmax
= source
->acdirmax
;
725 target
->caps
= source
->caps
;
729 * Allocate and initialise a server record
731 static struct nfs_server
*nfs_alloc_server(void)
733 struct nfs_server
*server
;
735 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
739 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
741 /* Zero out the NFS state stuff */
742 INIT_LIST_HEAD(&server
->client_link
);
743 INIT_LIST_HEAD(&server
->master_link
);
745 init_waitqueue_head(&server
->active_wq
);
746 atomic_set(&server
->active
, 0);
748 server
->io_stats
= nfs_alloc_iostats();
749 if (!server
->io_stats
) {
758 * Free up a server record
760 void nfs_free_server(struct nfs_server
*server
)
762 dprintk("--> nfs_free_server()\n");
764 spin_lock(&nfs_client_lock
);
765 list_del(&server
->client_link
);
766 list_del(&server
->master_link
);
767 spin_unlock(&nfs_client_lock
);
769 if (server
->destroy
!= NULL
)
770 server
->destroy(server
);
772 if (!IS_ERR(server
->client_acl
))
773 rpc_shutdown_client(server
->client_acl
);
774 if (!IS_ERR(server
->client
))
775 rpc_shutdown_client(server
->client
);
777 nfs_put_client(server
->nfs_client
);
779 nfs_free_iostats(server
->io_stats
);
780 bdi_destroy(&server
->backing_dev_info
);
782 nfs_release_automount_timer();
783 dprintk("<-- nfs_free_server()\n");
787 * Create a version 2 or 3 volume record
788 * - keyed on server and FSID
790 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
791 struct nfs_fh
*mntfh
)
793 struct nfs_server
*server
;
794 struct nfs_fattr fattr
;
797 server
= nfs_alloc_server();
799 return ERR_PTR(-ENOMEM
);
801 /* Get a client representation */
802 error
= nfs_init_server(server
, data
);
806 BUG_ON(!server
->nfs_client
);
807 BUG_ON(!server
->nfs_client
->rpc_ops
);
808 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
810 /* Probe the root fh to retrieve its FSID */
811 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
814 if (server
->nfs_client
->rpc_ops
->version
== 3) {
815 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
816 server
->namelen
= NFS3_MAXNAMLEN
;
817 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
818 server
->caps
|= NFS_CAP_READDIRPLUS
;
820 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
821 server
->namelen
= NFS2_MAXNAMLEN
;
824 if (!(fattr
.valid
& NFS_ATTR_FATTR
)) {
825 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, &fattr
);
827 dprintk("nfs_create_server: getattr error = %d\n", -error
);
831 memcpy(&server
->fsid
, &fattr
.fsid
, sizeof(server
->fsid
));
833 dprintk("Server FSID: %llx:%llx\n",
834 (unsigned long long) server
->fsid
.major
,
835 (unsigned long long) server
->fsid
.minor
);
837 BUG_ON(!server
->nfs_client
);
838 BUG_ON(!server
->nfs_client
->rpc_ops
);
839 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
841 spin_lock(&nfs_client_lock
);
842 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
843 list_add_tail(&server
->master_link
, &nfs_volume_list
);
844 spin_unlock(&nfs_client_lock
);
846 server
->mount_time
= jiffies
;
850 nfs_free_server(server
);
851 return ERR_PTR(error
);
856 * Initialise an NFS4 client record
858 static int nfs4_init_client(struct nfs_client
*clp
,
859 int proto
, int timeo
, int retrans
,
861 rpc_authflavor_t authflavour
)
865 if (clp
->cl_cons_state
== NFS_CS_READY
) {
866 /* the client is initialised already */
867 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
871 /* Check NFS protocol revision and initialize RPC op vector */
872 clp
->rpc_ops
= &nfs_v4_clientops
;
874 error
= nfs_create_rpc_client(clp
, proto
, timeo
, retrans
, authflavour
,
875 RPC_CLNT_CREATE_DISCRTRY
);
878 memcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
880 error
= nfs_idmap_new(clp
);
882 dprintk("%s: failed to create idmapper. Error = %d\n",
883 __FUNCTION__
, error
);
886 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
888 nfs_mark_client_ready(clp
, NFS_CS_READY
);
892 nfs_mark_client_ready(clp
, error
);
893 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
898 * Set up an NFS4 client
900 static int nfs4_set_client(struct nfs_server
*server
,
901 const char *hostname
, const struct sockaddr_in
*addr
,
903 rpc_authflavor_t authflavour
,
904 int proto
, int timeo
, int retrans
)
906 struct nfs_client_initdata cl_init
= {
907 .hostname
= hostname
,
911 struct nfs_client
*clp
;
914 dprintk("--> nfs4_set_client()\n");
916 /* Allocate or find a client reference we can use */
917 clp
= nfs_get_client(&cl_init
);
919 error
= PTR_ERR(clp
);
922 error
= nfs4_init_client(clp
, proto
, timeo
, retrans
, ip_addr
, authflavour
);
926 server
->nfs_client
= clp
;
927 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
933 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
938 * Create a version 4 volume record
940 static int nfs4_init_server(struct nfs_server
*server
,
941 const struct nfs_parsed_mount_data
*data
)
945 dprintk("--> nfs4_init_server()\n");
947 /* Initialise the client representation from the mount data */
948 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
949 server
->caps
|= NFS_CAP_ATOMIC_OPEN
;
952 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
954 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
956 server
->acregmin
= data
->acregmin
* HZ
;
957 server
->acregmax
= data
->acregmax
* HZ
;
958 server
->acdirmin
= data
->acdirmin
* HZ
;
959 server
->acdirmax
= data
->acdirmax
* HZ
;
961 error
= nfs_init_server_rpcclient(server
, data
->auth_flavors
[0]);
964 dprintk("<-- nfs4_init_server() = %d\n", error
);
969 * Create a version 4 volume record
970 * - keyed on server and FSID
972 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
973 struct nfs_fh
*mntfh
)
975 struct nfs_fattr fattr
;
976 struct nfs_server
*server
;
979 dprintk("--> nfs4_create_server()\n");
981 server
= nfs_alloc_server();
983 return ERR_PTR(-ENOMEM
);
985 /* Get a client record */
986 error
= nfs4_set_client(server
,
987 data
->nfs_server
.hostname
,
988 &data
->nfs_server
.address
,
989 data
->client_address
,
990 data
->auth_flavors
[0],
991 data
->nfs_server
.protocol
,
992 data
->timeo
, data
->retrans
);
996 /* set up the general RPC client */
997 error
= nfs4_init_server(server
, data
);
1001 BUG_ON(!server
->nfs_client
);
1002 BUG_ON(!server
->nfs_client
->rpc_ops
);
1003 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1005 /* Probe the root fh to retrieve its FSID */
1006 error
= nfs4_path_walk(server
, mntfh
, data
->nfs_server
.export_path
);
1010 dprintk("Server FSID: %llx:%llx\n",
1011 (unsigned long long) server
->fsid
.major
,
1012 (unsigned long long) server
->fsid
.minor
);
1013 dprintk("Mount FH: %d\n", mntfh
->size
);
1015 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1019 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1020 server
->namelen
= NFS4_MAXNAMLEN
;
1022 BUG_ON(!server
->nfs_client
);
1023 BUG_ON(!server
->nfs_client
->rpc_ops
);
1024 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1026 spin_lock(&nfs_client_lock
);
1027 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1028 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1029 spin_unlock(&nfs_client_lock
);
1031 server
->mount_time
= jiffies
;
1032 dprintk("<-- nfs4_create_server() = %p\n", server
);
1036 nfs_free_server(server
);
1037 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1038 return ERR_PTR(error
);
1042 * Create an NFS4 referral server record
1044 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1045 struct nfs_fh
*mntfh
)
1047 struct nfs_client
*parent_client
;
1048 struct nfs_server
*server
, *parent_server
;
1049 struct nfs_fattr fattr
;
1052 dprintk("--> nfs4_create_referral_server()\n");
1054 server
= nfs_alloc_server();
1056 return ERR_PTR(-ENOMEM
);
1058 parent_server
= NFS_SB(data
->sb
);
1059 parent_client
= parent_server
->nfs_client
;
1061 /* Get a client representation.
1062 * Note: NFSv4 always uses TCP, */
1063 error
= nfs4_set_client(server
, data
->hostname
, data
->addr
,
1064 parent_client
->cl_ipaddr
,
1066 parent_server
->client
->cl_xprt
->prot
,
1067 parent_client
->retrans_timeo
,
1068 parent_client
->retrans_count
);
1072 /* Initialise the client representation from the parent server */
1073 nfs_server_copy_userdata(server
, parent_server
);
1074 server
->caps
|= NFS_CAP_ATOMIC_OPEN
;
1076 error
= nfs_init_server_rpcclient(server
, data
->authflavor
);
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 and filehandle */
1085 error
= nfs4_path_walk(server
, mntfh
, data
->mnt_path
);
1089 /* probe the filesystem info for this server filesystem */
1090 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1094 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1095 server
->namelen
= NFS4_MAXNAMLEN
;
1097 dprintk("Referral FSID: %llx:%llx\n",
1098 (unsigned long long) server
->fsid
.major
,
1099 (unsigned long long) server
->fsid
.minor
);
1101 spin_lock(&nfs_client_lock
);
1102 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1103 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1104 spin_unlock(&nfs_client_lock
);
1106 server
->mount_time
= jiffies
;
1108 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1112 nfs_free_server(server
);
1113 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1114 return ERR_PTR(error
);
1117 #endif /* CONFIG_NFS_V4 */
1120 * Clone an NFS2, NFS3 or NFS4 server record
1122 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1124 struct nfs_fattr
*fattr
)
1126 struct nfs_server
*server
;
1127 struct nfs_fattr fattr_fsinfo
;
1130 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1131 (unsigned long long) fattr
->fsid
.major
,
1132 (unsigned long long) fattr
->fsid
.minor
);
1134 server
= nfs_alloc_server();
1136 return ERR_PTR(-ENOMEM
);
1138 /* Copy data from the source */
1139 server
->nfs_client
= source
->nfs_client
;
1140 atomic_inc(&server
->nfs_client
->cl_count
);
1141 nfs_server_copy_userdata(server
, source
);
1143 server
->fsid
= fattr
->fsid
;
1145 error
= nfs_init_server_rpcclient(server
, source
->client
->cl_auth
->au_flavor
);
1147 goto out_free_server
;
1148 if (!IS_ERR(source
->client_acl
))
1149 nfs_init_server_aclclient(server
);
1151 /* probe the filesystem info for this server filesystem */
1152 error
= nfs_probe_fsinfo(server
, fh
, &fattr_fsinfo
);
1154 goto out_free_server
;
1156 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1157 server
->namelen
= NFS4_MAXNAMLEN
;
1159 dprintk("Cloned FSID: %llx:%llx\n",
1160 (unsigned long long) server
->fsid
.major
,
1161 (unsigned long long) server
->fsid
.minor
);
1163 error
= nfs_start_lockd(server
);
1165 goto out_free_server
;
1167 spin_lock(&nfs_client_lock
);
1168 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1169 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1170 spin_unlock(&nfs_client_lock
);
1172 server
->mount_time
= jiffies
;
1174 dprintk("<-- nfs_clone_server() = %p\n", server
);
1178 nfs_free_server(server
);
1179 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1180 return ERR_PTR(error
);
1183 #ifdef CONFIG_PROC_FS
1184 static struct proc_dir_entry
*proc_fs_nfs
;
1186 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1187 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1188 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1189 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1190 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1192 static struct seq_operations nfs_server_list_ops
= {
1193 .start
= nfs_server_list_start
,
1194 .next
= nfs_server_list_next
,
1195 .stop
= nfs_server_list_stop
,
1196 .show
= nfs_server_list_show
,
1199 static const struct file_operations nfs_server_list_fops
= {
1200 .open
= nfs_server_list_open
,
1202 .llseek
= seq_lseek
,
1203 .release
= seq_release
,
1206 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1207 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1208 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1209 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1210 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1212 static struct seq_operations nfs_volume_list_ops
= {
1213 .start
= nfs_volume_list_start
,
1214 .next
= nfs_volume_list_next
,
1215 .stop
= nfs_volume_list_stop
,
1216 .show
= nfs_volume_list_show
,
1219 static const struct file_operations nfs_volume_list_fops
= {
1220 .open
= nfs_volume_list_open
,
1222 .llseek
= seq_lseek
,
1223 .release
= seq_release
,
1227 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1230 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1235 ret
= seq_open(file
, &nfs_server_list_ops
);
1239 m
= file
->private_data
;
1240 m
->private = PDE(inode
)->data
;
1246 * set up the iterator to start reading from the server list and return the first item
1248 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1250 /* lock the list against modification */
1251 spin_lock(&nfs_client_lock
);
1252 return seq_list_start_head(&nfs_client_list
, *_pos
);
1256 * move to next server
1258 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1260 return seq_list_next(v
, &nfs_client_list
, pos
);
1264 * clean up after reading from the transports list
1266 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1268 spin_unlock(&nfs_client_lock
);
1272 * display a header line followed by a load of call lines
1274 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1276 struct nfs_client
*clp
;
1278 /* display header on line 1 */
1279 if (v
== &nfs_client_list
) {
1280 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1284 /* display one transport per line on subsequent lines */
1285 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1287 seq_printf(m
, "v%d %02x%02x%02x%02x %4hx %3d %s\n",
1289 NIPQUAD(clp
->cl_addr
.sin_addr
),
1290 ntohs(clp
->cl_addr
.sin_port
),
1291 atomic_read(&clp
->cl_count
),
1298 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1300 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1305 ret
= seq_open(file
, &nfs_volume_list_ops
);
1309 m
= file
->private_data
;
1310 m
->private = PDE(inode
)->data
;
1316 * set up the iterator to start reading from the volume list and return the first item
1318 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1320 /* lock the list against modification */
1321 spin_lock(&nfs_client_lock
);
1322 return seq_list_start_head(&nfs_volume_list
, *_pos
);
1326 * move to next volume
1328 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1330 return seq_list_next(v
, &nfs_volume_list
, pos
);
1334 * clean up after reading from the transports list
1336 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1338 spin_unlock(&nfs_client_lock
);
1342 * display a header line followed by a load of call lines
1344 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1346 struct nfs_server
*server
;
1347 struct nfs_client
*clp
;
1348 char dev
[8], fsid
[17];
1350 /* display header on line 1 */
1351 if (v
== &nfs_volume_list
) {
1352 seq_puts(m
, "NV SERVER PORT DEV FSID\n");
1355 /* display one transport per line on subsequent lines */
1356 server
= list_entry(v
, struct nfs_server
, master_link
);
1357 clp
= server
->nfs_client
;
1359 snprintf(dev
, 8, "%u:%u",
1360 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1362 snprintf(fsid
, 17, "%llx:%llx",
1363 (unsigned long long) server
->fsid
.major
,
1364 (unsigned long long) server
->fsid
.minor
);
1366 seq_printf(m
, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n",
1368 NIPQUAD(clp
->cl_addr
.sin_addr
),
1369 ntohs(clp
->cl_addr
.sin_port
),
1377 * initialise the /proc/fs/nfsfs/ directory
1379 int __init
nfs_fs_proc_init(void)
1381 struct proc_dir_entry
*p
;
1383 proc_fs_nfs
= proc_mkdir("nfsfs", proc_root_fs
);
1387 proc_fs_nfs
->owner
= THIS_MODULE
;
1389 /* a file of servers with which we're dealing */
1390 p
= create_proc_entry("servers", S_IFREG
|S_IRUGO
, proc_fs_nfs
);
1394 p
->proc_fops
= &nfs_server_list_fops
;
1395 p
->owner
= THIS_MODULE
;
1397 /* a file of volumes that we have mounted */
1398 p
= create_proc_entry("volumes", S_IFREG
|S_IRUGO
, proc_fs_nfs
);
1402 p
->proc_fops
= &nfs_volume_list_fops
;
1403 p
->owner
= THIS_MODULE
;
1407 remove_proc_entry("servers", proc_fs_nfs
);
1409 remove_proc_entry("nfsfs", proc_root_fs
);
1415 * clean up the /proc/fs/nfsfs/ directory
1417 void nfs_fs_proc_exit(void)
1419 remove_proc_entry("volumes", proc_fs_nfs
);
1420 remove_proc_entry("servers", proc_fs_nfs
);
1421 remove_proc_entry("nfsfs", proc_root_fs
);
1424 #endif /* CONFIG_PROC_FS */