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 address
212 * - caller must hold nfs_client_lock
214 static struct nfs_client
*__nfs_find_client(const struct sockaddr_in
*addr
, int nfsversion
, int match_port
)
216 struct nfs_client
*clp
;
218 list_for_each_entry(clp
, &nfs_client_list
, cl_share_link
) {
219 /* Don't match clients that failed to initialise properly */
220 if (clp
->cl_cons_state
< 0)
223 /* Different NFS versions cannot share the same nfs_client */
224 if (clp
->cl_nfsversion
!= nfsversion
)
227 if (clp
->cl_addr
.sin_addr
.s_addr
!= addr
->sin_addr
.s_addr
)
230 if (!match_port
|| clp
->cl_addr
.sin_port
== addr
->sin_port
)
237 atomic_inc(&clp
->cl_count
);
242 * Find a client by IP address and protocol version
243 * - returns NULL if no such client
245 struct nfs_client
*nfs_find_client(const struct sockaddr_in
*addr
, int nfsversion
)
247 struct nfs_client
*clp
;
249 spin_lock(&nfs_client_lock
);
250 clp
= __nfs_find_client(addr
, nfsversion
, 0);
251 spin_unlock(&nfs_client_lock
);
252 if (clp
!= NULL
&& clp
->cl_cons_state
!= NFS_CS_READY
) {
260 * Look up a client by IP address and protocol version
261 * - creates a new record if one doesn't yet exist
263 static struct nfs_client
*nfs_get_client(const struct nfs_client_initdata
*cl_init
)
265 struct nfs_client
*clp
, *new = NULL
;
268 dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT
":%d,%d)\n",
269 cl_init
->hostname
?: "", NIPQUAD(cl_init
->addr
->sin_addr
),
270 cl_init
->addr
->sin_port
, cl_init
->version
);
272 /* see if the client already exists */
274 spin_lock(&nfs_client_lock
);
276 clp
= __nfs_find_client(cl_init
->addr
, cl_init
->version
, 1);
282 spin_unlock(&nfs_client_lock
);
284 new = nfs_alloc_client(cl_init
);
287 return ERR_PTR(-ENOMEM
);
289 /* install a new client and return with it unready */
292 list_add(&clp
->cl_share_link
, &nfs_client_list
);
293 spin_unlock(&nfs_client_lock
);
294 dprintk("--> nfs_get_client() = %p [new]\n", clp
);
297 /* found an existing client
298 * - make sure it's ready before returning
301 spin_unlock(&nfs_client_lock
);
304 nfs_free_client(new);
306 error
= wait_event_interruptible(nfs_client_active_wq
,
307 clp
->cl_cons_state
!= NFS_CS_INITING
);
310 return ERR_PTR(-ERESTARTSYS
);
313 if (clp
->cl_cons_state
< NFS_CS_READY
) {
314 error
= clp
->cl_cons_state
;
316 return ERR_PTR(error
);
319 BUG_ON(clp
->cl_cons_state
!= NFS_CS_READY
);
321 dprintk("--> nfs_get_client() = %p [share]\n", clp
);
326 * Mark a server as ready or failed
328 static void nfs_mark_client_ready(struct nfs_client
*clp
, int state
)
330 clp
->cl_cons_state
= state
;
331 wake_up_all(&nfs_client_active_wq
);
335 * Initialise the timeout values for a connection
337 static void nfs_init_timeout_values(struct rpc_timeout
*to
, int proto
,
338 unsigned int timeo
, unsigned int retrans
)
340 to
->to_initval
= timeo
* HZ
/ 10;
341 to
->to_retries
= retrans
;
346 case XPRT_TRANSPORT_TCP
:
347 case XPRT_TRANSPORT_RDMA
:
349 to
->to_initval
= 60 * HZ
;
350 if (to
->to_initval
> NFS_MAX_TCP_TIMEOUT
)
351 to
->to_initval
= NFS_MAX_TCP_TIMEOUT
;
352 to
->to_increment
= to
->to_initval
;
353 to
->to_maxval
= to
->to_initval
+ (to
->to_increment
* to
->to_retries
);
354 to
->to_exponential
= 0;
356 case XPRT_TRANSPORT_UDP
:
359 to
->to_initval
= 11 * HZ
/ 10;
360 if (to
->to_initval
> NFS_MAX_UDP_TIMEOUT
)
361 to
->to_initval
= NFS_MAX_UDP_TIMEOUT
;
362 to
->to_maxval
= NFS_MAX_UDP_TIMEOUT
;
363 to
->to_exponential
= 1;
369 * Create an RPC client handle
371 static int nfs_create_rpc_client(struct nfs_client
*clp
, int proto
,
373 unsigned int retrans
,
374 rpc_authflavor_t flavor
,
377 struct rpc_timeout timeparms
;
378 struct rpc_clnt
*clnt
= NULL
;
379 struct rpc_create_args args
= {
381 .address
= (struct sockaddr
*)&clp
->cl_addr
,
382 .addrsize
= sizeof(clp
->cl_addr
),
383 .timeout
= &timeparms
,
384 .servername
= clp
->cl_hostname
,
385 .program
= &nfs_program
,
386 .version
= clp
->rpc_ops
->version
,
387 .authflavor
= flavor
,
391 if (!IS_ERR(clp
->cl_rpcclient
))
394 nfs_init_timeout_values(&timeparms
, proto
, timeo
, retrans
);
395 clp
->retrans_timeo
= timeparms
.to_initval
;
396 clp
->retrans_count
= timeparms
.to_retries
;
398 clnt
= rpc_create(&args
);
400 dprintk("%s: cannot create RPC client. Error = %ld\n",
401 __FUNCTION__
, PTR_ERR(clnt
));
402 return PTR_ERR(clnt
);
405 clp
->cl_rpcclient
= clnt
;
410 * Version 2 or 3 client destruction
412 static void nfs_destroy_server(struct nfs_server
*server
)
414 if (!(server
->flags
& NFS_MOUNT_NONLM
))
415 lockd_down(); /* release rpc.lockd */
419 * Version 2 or 3 lockd setup
421 static int nfs_start_lockd(struct nfs_server
*server
)
425 if (server
->nfs_client
->cl_nfsversion
> 3)
427 if (server
->flags
& NFS_MOUNT_NONLM
)
429 error
= lockd_up((server
->flags
& NFS_MOUNT_TCP
) ?
430 IPPROTO_TCP
: IPPROTO_UDP
);
432 server
->flags
|= NFS_MOUNT_NONLM
;
434 server
->destroy
= nfs_destroy_server
;
440 * Initialise an NFSv3 ACL client connection
442 #ifdef CONFIG_NFS_V3_ACL
443 static void nfs_init_server_aclclient(struct nfs_server
*server
)
445 if (server
->nfs_client
->cl_nfsversion
!= 3)
447 if (server
->flags
& NFS_MOUNT_NOACL
)
450 server
->client_acl
= rpc_bind_new_program(server
->client
, &nfsacl_program
, 3);
451 if (IS_ERR(server
->client_acl
))
454 /* No errors! Assume that Sun nfsacls are supported */
455 server
->caps
|= NFS_CAP_ACLS
;
459 server
->caps
&= ~NFS_CAP_ACLS
;
462 static inline void nfs_init_server_aclclient(struct nfs_server
*server
)
464 server
->flags
&= ~NFS_MOUNT_NOACL
;
465 server
->caps
&= ~NFS_CAP_ACLS
;
470 * Create a general RPC client
472 static int nfs_init_server_rpcclient(struct nfs_server
*server
, rpc_authflavor_t pseudoflavour
)
474 struct nfs_client
*clp
= server
->nfs_client
;
476 server
->client
= rpc_clone_client(clp
->cl_rpcclient
);
477 if (IS_ERR(server
->client
)) {
478 dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__
);
479 return PTR_ERR(server
->client
);
482 if (pseudoflavour
!= clp
->cl_rpcclient
->cl_auth
->au_flavor
) {
483 struct rpc_auth
*auth
;
485 auth
= rpcauth_create(pseudoflavour
, server
->client
);
487 dprintk("%s: couldn't create credcache!\n", __FUNCTION__
);
488 return PTR_ERR(auth
);
491 server
->client
->cl_softrtry
= 0;
492 if (server
->flags
& NFS_MOUNT_SOFT
)
493 server
->client
->cl_softrtry
= 1;
495 server
->client
->cl_intr
= 0;
496 if (server
->flags
& NFS4_MOUNT_INTR
)
497 server
->client
->cl_intr
= 1;
503 * Initialise an NFS2 or NFS3 client
505 static int nfs_init_client(struct nfs_client
*clp
,
506 const struct nfs_parsed_mount_data
*data
)
510 if (clp
->cl_cons_state
== NFS_CS_READY
) {
511 /* the client is already initialised */
512 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp
);
516 /* Check NFS protocol revision and initialize RPC op vector */
517 clp
->rpc_ops
= &nfs_v2_clientops
;
519 if (clp
->cl_nfsversion
== 3)
520 clp
->rpc_ops
= &nfs_v3_clientops
;
523 * Create a client RPC handle for doing FSSTAT with UNIX auth only
524 * - RFC 2623, sec 2.3.2
526 error
= nfs_create_rpc_client(clp
, data
->nfs_server
.protocol
,
527 data
->timeo
, data
->retrans
, RPC_AUTH_UNIX
, 0);
530 nfs_mark_client_ready(clp
, NFS_CS_READY
);
534 nfs_mark_client_ready(clp
, error
);
535 dprintk("<-- nfs_init_client() = xerror %d\n", error
);
540 * Create a version 2 or 3 client
542 static int nfs_init_server(struct nfs_server
*server
,
543 const struct nfs_parsed_mount_data
*data
)
545 struct nfs_client_initdata cl_init
= {
546 .hostname
= data
->nfs_server
.hostname
,
547 .addr
= &data
->nfs_server
.address
,
550 struct nfs_client
*clp
;
553 dprintk("--> nfs_init_server()\n");
556 if (data
->flags
& NFS_MOUNT_VER3
)
560 /* Allocate or find a client reference we can use */
561 clp
= nfs_get_client(&cl_init
);
563 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp
));
567 error
= nfs_init_client(clp
, data
);
571 server
->nfs_client
= clp
;
573 /* Initialise the client representation from the mount data */
574 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
577 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
579 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
581 server
->acregmin
= data
->acregmin
* HZ
;
582 server
->acregmax
= data
->acregmax
* HZ
;
583 server
->acdirmin
= data
->acdirmin
* HZ
;
584 server
->acdirmax
= data
->acdirmax
* HZ
;
586 /* Start lockd here, before we might error out */
587 error
= nfs_start_lockd(server
);
591 error
= nfs_init_server_rpcclient(server
, data
->auth_flavors
[0]);
595 server
->namelen
= data
->namlen
;
596 /* Create a client RPC handle for the NFSv3 ACL management interface */
597 nfs_init_server_aclclient(server
);
598 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp
);
602 server
->nfs_client
= NULL
;
604 dprintk("<-- nfs_init_server() = xerror %d\n", error
);
609 * Load up the server record from information gained in an fsinfo record
611 static void nfs_server_set_fsinfo(struct nfs_server
*server
, struct nfs_fsinfo
*fsinfo
)
613 unsigned long max_rpc_payload
;
615 /* Work out a lot of parameters */
616 if (server
->rsize
== 0)
617 server
->rsize
= nfs_block_size(fsinfo
->rtpref
, NULL
);
618 if (server
->wsize
== 0)
619 server
->wsize
= nfs_block_size(fsinfo
->wtpref
, NULL
);
621 if (fsinfo
->rtmax
>= 512 && server
->rsize
> fsinfo
->rtmax
)
622 server
->rsize
= nfs_block_size(fsinfo
->rtmax
, NULL
);
623 if (fsinfo
->wtmax
>= 512 && server
->wsize
> fsinfo
->wtmax
)
624 server
->wsize
= nfs_block_size(fsinfo
->wtmax
, NULL
);
626 max_rpc_payload
= nfs_block_size(rpc_max_payload(server
->client
), NULL
);
627 if (server
->rsize
> max_rpc_payload
)
628 server
->rsize
= max_rpc_payload
;
629 if (server
->rsize
> NFS_MAX_FILE_IO_SIZE
)
630 server
->rsize
= NFS_MAX_FILE_IO_SIZE
;
631 server
->rpages
= (server
->rsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
633 server
->backing_dev_info
.ra_pages
= server
->rpages
* NFS_MAX_READAHEAD
;
635 if (server
->wsize
> max_rpc_payload
)
636 server
->wsize
= max_rpc_payload
;
637 if (server
->wsize
> NFS_MAX_FILE_IO_SIZE
)
638 server
->wsize
= NFS_MAX_FILE_IO_SIZE
;
639 server
->wpages
= (server
->wsize
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
640 server
->wtmult
= nfs_block_bits(fsinfo
->wtmult
, NULL
);
642 server
->dtsize
= nfs_block_size(fsinfo
->dtpref
, NULL
);
643 if (server
->dtsize
> PAGE_CACHE_SIZE
)
644 server
->dtsize
= PAGE_CACHE_SIZE
;
645 if (server
->dtsize
> server
->rsize
)
646 server
->dtsize
= server
->rsize
;
648 if (server
->flags
& NFS_MOUNT_NOAC
) {
649 server
->acregmin
= server
->acregmax
= 0;
650 server
->acdirmin
= server
->acdirmax
= 0;
653 server
->maxfilesize
= fsinfo
->maxfilesize
;
655 /* We're airborne Set socket buffersize */
656 rpc_setbufsize(server
->client
, server
->wsize
+ 100, server
->rsize
+ 100);
660 * Probe filesystem information, including the FSID on v2/v3
662 static int nfs_probe_fsinfo(struct nfs_server
*server
, struct nfs_fh
*mntfh
, struct nfs_fattr
*fattr
)
664 struct nfs_fsinfo fsinfo
;
665 struct nfs_client
*clp
= server
->nfs_client
;
668 dprintk("--> nfs_probe_fsinfo()\n");
670 if (clp
->rpc_ops
->set_capabilities
!= NULL
) {
671 error
= clp
->rpc_ops
->set_capabilities(server
, mntfh
);
676 fsinfo
.fattr
= fattr
;
677 nfs_fattr_init(fattr
);
678 error
= clp
->rpc_ops
->fsinfo(server
, mntfh
, &fsinfo
);
682 nfs_server_set_fsinfo(server
, &fsinfo
);
683 error
= bdi_init(&server
->backing_dev_info
);
688 /* Get some general file system info */
689 if (server
->namelen
== 0) {
690 struct nfs_pathconf pathinfo
;
692 pathinfo
.fattr
= fattr
;
693 nfs_fattr_init(fattr
);
695 if (clp
->rpc_ops
->pathconf(server
, mntfh
, &pathinfo
) >= 0)
696 server
->namelen
= pathinfo
.max_namelen
;
699 dprintk("<-- nfs_probe_fsinfo() = 0\n");
703 dprintk("nfs_probe_fsinfo: error = %d\n", -error
);
708 * Copy useful information when duplicating a server record
710 static void nfs_server_copy_userdata(struct nfs_server
*target
, struct nfs_server
*source
)
712 target
->flags
= source
->flags
;
713 target
->acregmin
= source
->acregmin
;
714 target
->acregmax
= source
->acregmax
;
715 target
->acdirmin
= source
->acdirmin
;
716 target
->acdirmax
= source
->acdirmax
;
717 target
->caps
= source
->caps
;
721 * Allocate and initialise a server record
723 static struct nfs_server
*nfs_alloc_server(void)
725 struct nfs_server
*server
;
727 server
= kzalloc(sizeof(struct nfs_server
), GFP_KERNEL
);
731 server
->client
= server
->client_acl
= ERR_PTR(-EINVAL
);
733 /* Zero out the NFS state stuff */
734 INIT_LIST_HEAD(&server
->client_link
);
735 INIT_LIST_HEAD(&server
->master_link
);
737 init_waitqueue_head(&server
->active_wq
);
738 atomic_set(&server
->active
, 0);
740 server
->io_stats
= nfs_alloc_iostats();
741 if (!server
->io_stats
) {
750 * Free up a server record
752 void nfs_free_server(struct nfs_server
*server
)
754 dprintk("--> nfs_free_server()\n");
756 spin_lock(&nfs_client_lock
);
757 list_del(&server
->client_link
);
758 list_del(&server
->master_link
);
759 spin_unlock(&nfs_client_lock
);
761 if (server
->destroy
!= NULL
)
762 server
->destroy(server
);
764 if (!IS_ERR(server
->client_acl
))
765 rpc_shutdown_client(server
->client_acl
);
766 if (!IS_ERR(server
->client
))
767 rpc_shutdown_client(server
->client
);
769 nfs_put_client(server
->nfs_client
);
771 nfs_free_iostats(server
->io_stats
);
772 bdi_destroy(&server
->backing_dev_info
);
774 nfs_release_automount_timer();
775 dprintk("<-- nfs_free_server()\n");
779 * Create a version 2 or 3 volume record
780 * - keyed on server and FSID
782 struct nfs_server
*nfs_create_server(const struct nfs_parsed_mount_data
*data
,
783 struct nfs_fh
*mntfh
)
785 struct nfs_server
*server
;
786 struct nfs_fattr fattr
;
789 server
= nfs_alloc_server();
791 return ERR_PTR(-ENOMEM
);
793 /* Get a client representation */
794 error
= nfs_init_server(server
, data
);
798 BUG_ON(!server
->nfs_client
);
799 BUG_ON(!server
->nfs_client
->rpc_ops
);
800 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
802 /* Probe the root fh to retrieve its FSID */
803 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
806 if (server
->nfs_client
->rpc_ops
->version
== 3) {
807 if (server
->namelen
== 0 || server
->namelen
> NFS3_MAXNAMLEN
)
808 server
->namelen
= NFS3_MAXNAMLEN
;
809 if (!(data
->flags
& NFS_MOUNT_NORDIRPLUS
))
810 server
->caps
|= NFS_CAP_READDIRPLUS
;
812 if (server
->namelen
== 0 || server
->namelen
> NFS2_MAXNAMLEN
)
813 server
->namelen
= NFS2_MAXNAMLEN
;
816 if (!(fattr
.valid
& NFS_ATTR_FATTR
)) {
817 error
= server
->nfs_client
->rpc_ops
->getattr(server
, mntfh
, &fattr
);
819 dprintk("nfs_create_server: getattr error = %d\n", -error
);
823 memcpy(&server
->fsid
, &fattr
.fsid
, sizeof(server
->fsid
));
825 dprintk("Server FSID: %llx:%llx\n",
826 (unsigned long long) server
->fsid
.major
,
827 (unsigned long long) server
->fsid
.minor
);
829 BUG_ON(!server
->nfs_client
);
830 BUG_ON(!server
->nfs_client
->rpc_ops
);
831 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
833 spin_lock(&nfs_client_lock
);
834 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
835 list_add_tail(&server
->master_link
, &nfs_volume_list
);
836 spin_unlock(&nfs_client_lock
);
838 server
->mount_time
= jiffies
;
842 nfs_free_server(server
);
843 return ERR_PTR(error
);
848 * Initialise an NFS4 client record
850 static int nfs4_init_client(struct nfs_client
*clp
,
851 int proto
, int timeo
, int retrans
,
853 rpc_authflavor_t authflavour
)
857 if (clp
->cl_cons_state
== NFS_CS_READY
) {
858 /* the client is initialised already */
859 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
863 /* Check NFS protocol revision and initialize RPC op vector */
864 clp
->rpc_ops
= &nfs_v4_clientops
;
866 error
= nfs_create_rpc_client(clp
, proto
, timeo
, retrans
, authflavour
,
867 RPC_CLNT_CREATE_DISCRTRY
);
870 memcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
872 error
= nfs_idmap_new(clp
);
874 dprintk("%s: failed to create idmapper. Error = %d\n",
875 __FUNCTION__
, error
);
878 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
880 nfs_mark_client_ready(clp
, NFS_CS_READY
);
884 nfs_mark_client_ready(clp
, error
);
885 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
890 * Set up an NFS4 client
892 static int nfs4_set_client(struct nfs_server
*server
,
893 const char *hostname
, const struct sockaddr_in
*addr
,
895 rpc_authflavor_t authflavour
,
896 int proto
, int timeo
, int retrans
)
898 struct nfs_client_initdata cl_init
= {
899 .hostname
= hostname
,
903 struct nfs_client
*clp
;
906 dprintk("--> nfs4_set_client()\n");
908 /* Allocate or find a client reference we can use */
909 clp
= nfs_get_client(&cl_init
);
911 error
= PTR_ERR(clp
);
914 error
= nfs4_init_client(clp
, proto
, timeo
, retrans
, ip_addr
, authflavour
);
918 server
->nfs_client
= clp
;
919 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
925 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
930 * Create a version 4 volume record
932 static int nfs4_init_server(struct nfs_server
*server
,
933 const struct nfs_parsed_mount_data
*data
)
937 dprintk("--> nfs4_init_server()\n");
939 /* Initialise the client representation from the mount data */
940 server
->flags
= data
->flags
& NFS_MOUNT_FLAGMASK
;
941 server
->caps
|= NFS_CAP_ATOMIC_OPEN
;
944 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
946 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
948 server
->acregmin
= data
->acregmin
* HZ
;
949 server
->acregmax
= data
->acregmax
* HZ
;
950 server
->acdirmin
= data
->acdirmin
* HZ
;
951 server
->acdirmax
= data
->acdirmax
* HZ
;
953 error
= nfs_init_server_rpcclient(server
, data
->auth_flavors
[0]);
956 dprintk("<-- nfs4_init_server() = %d\n", error
);
961 * Create a version 4 volume record
962 * - keyed on server and FSID
964 struct nfs_server
*nfs4_create_server(const struct nfs_parsed_mount_data
*data
,
965 struct nfs_fh
*mntfh
)
967 struct nfs_fattr fattr
;
968 struct nfs_server
*server
;
971 dprintk("--> nfs4_create_server()\n");
973 server
= nfs_alloc_server();
975 return ERR_PTR(-ENOMEM
);
977 /* Get a client record */
978 error
= nfs4_set_client(server
,
979 data
->nfs_server
.hostname
,
980 &data
->nfs_server
.address
,
981 data
->client_address
,
982 data
->auth_flavors
[0],
983 data
->nfs_server
.protocol
,
984 data
->timeo
, data
->retrans
);
988 /* set up the general RPC client */
989 error
= nfs4_init_server(server
, data
);
993 BUG_ON(!server
->nfs_client
);
994 BUG_ON(!server
->nfs_client
->rpc_ops
);
995 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
997 /* Probe the root fh to retrieve its FSID */
998 error
= nfs4_path_walk(server
, mntfh
, data
->nfs_server
.export_path
);
1002 dprintk("Server FSID: %llx:%llx\n",
1003 (unsigned long long) server
->fsid
.major
,
1004 (unsigned long long) server
->fsid
.minor
);
1005 dprintk("Mount FH: %d\n", mntfh
->size
);
1007 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1011 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1012 server
->namelen
= NFS4_MAXNAMLEN
;
1014 BUG_ON(!server
->nfs_client
);
1015 BUG_ON(!server
->nfs_client
->rpc_ops
);
1016 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1018 spin_lock(&nfs_client_lock
);
1019 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1020 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1021 spin_unlock(&nfs_client_lock
);
1023 server
->mount_time
= jiffies
;
1024 dprintk("<-- nfs4_create_server() = %p\n", server
);
1028 nfs_free_server(server
);
1029 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1030 return ERR_PTR(error
);
1034 * Create an NFS4 referral server record
1036 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1037 struct nfs_fh
*mntfh
)
1039 struct nfs_client
*parent_client
;
1040 struct nfs_server
*server
, *parent_server
;
1041 struct nfs_fattr fattr
;
1044 dprintk("--> nfs4_create_referral_server()\n");
1046 server
= nfs_alloc_server();
1048 return ERR_PTR(-ENOMEM
);
1050 parent_server
= NFS_SB(data
->sb
);
1051 parent_client
= parent_server
->nfs_client
;
1053 /* Get a client representation.
1054 * Note: NFSv4 always uses TCP, */
1055 error
= nfs4_set_client(server
, data
->hostname
, data
->addr
,
1056 parent_client
->cl_ipaddr
,
1058 parent_server
->client
->cl_xprt
->prot
,
1059 parent_client
->retrans_timeo
,
1060 parent_client
->retrans_count
);
1064 /* Initialise the client representation from the parent server */
1065 nfs_server_copy_userdata(server
, parent_server
);
1066 server
->caps
|= NFS_CAP_ATOMIC_OPEN
;
1068 error
= nfs_init_server_rpcclient(server
, data
->authflavor
);
1072 BUG_ON(!server
->nfs_client
);
1073 BUG_ON(!server
->nfs_client
->rpc_ops
);
1074 BUG_ON(!server
->nfs_client
->rpc_ops
->file_inode_ops
);
1076 /* Probe the root fh to retrieve its FSID and filehandle */
1077 error
= nfs4_path_walk(server
, mntfh
, data
->mnt_path
);
1081 /* probe the filesystem info for this server filesystem */
1082 error
= nfs_probe_fsinfo(server
, mntfh
, &fattr
);
1086 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1087 server
->namelen
= NFS4_MAXNAMLEN
;
1089 dprintk("Referral FSID: %llx:%llx\n",
1090 (unsigned long long) server
->fsid
.major
,
1091 (unsigned long long) server
->fsid
.minor
);
1093 spin_lock(&nfs_client_lock
);
1094 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1095 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1096 spin_unlock(&nfs_client_lock
);
1098 server
->mount_time
= jiffies
;
1100 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1104 nfs_free_server(server
);
1105 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1106 return ERR_PTR(error
);
1109 #endif /* CONFIG_NFS_V4 */
1112 * Clone an NFS2, NFS3 or NFS4 server record
1114 struct nfs_server
*nfs_clone_server(struct nfs_server
*source
,
1116 struct nfs_fattr
*fattr
)
1118 struct nfs_server
*server
;
1119 struct nfs_fattr fattr_fsinfo
;
1122 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1123 (unsigned long long) fattr
->fsid
.major
,
1124 (unsigned long long) fattr
->fsid
.minor
);
1126 server
= nfs_alloc_server();
1128 return ERR_PTR(-ENOMEM
);
1130 /* Copy data from the source */
1131 server
->nfs_client
= source
->nfs_client
;
1132 atomic_inc(&server
->nfs_client
->cl_count
);
1133 nfs_server_copy_userdata(server
, source
);
1135 server
->fsid
= fattr
->fsid
;
1137 error
= nfs_init_server_rpcclient(server
, source
->client
->cl_auth
->au_flavor
);
1139 goto out_free_server
;
1140 if (!IS_ERR(source
->client_acl
))
1141 nfs_init_server_aclclient(server
);
1143 /* probe the filesystem info for this server filesystem */
1144 error
= nfs_probe_fsinfo(server
, fh
, &fattr_fsinfo
);
1146 goto out_free_server
;
1148 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
1149 server
->namelen
= NFS4_MAXNAMLEN
;
1151 dprintk("Cloned FSID: %llx:%llx\n",
1152 (unsigned long long) server
->fsid
.major
,
1153 (unsigned long long) server
->fsid
.minor
);
1155 error
= nfs_start_lockd(server
);
1157 goto out_free_server
;
1159 spin_lock(&nfs_client_lock
);
1160 list_add_tail(&server
->client_link
, &server
->nfs_client
->cl_superblocks
);
1161 list_add_tail(&server
->master_link
, &nfs_volume_list
);
1162 spin_unlock(&nfs_client_lock
);
1164 server
->mount_time
= jiffies
;
1166 dprintk("<-- nfs_clone_server() = %p\n", server
);
1170 nfs_free_server(server
);
1171 dprintk("<-- nfs_clone_server() = error %d\n", error
);
1172 return ERR_PTR(error
);
1175 #ifdef CONFIG_PROC_FS
1176 static struct proc_dir_entry
*proc_fs_nfs
;
1178 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
);
1179 static void *nfs_server_list_start(struct seq_file
*p
, loff_t
*pos
);
1180 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1181 static void nfs_server_list_stop(struct seq_file
*p
, void *v
);
1182 static int nfs_server_list_show(struct seq_file
*m
, void *v
);
1184 static struct seq_operations nfs_server_list_ops
= {
1185 .start
= nfs_server_list_start
,
1186 .next
= nfs_server_list_next
,
1187 .stop
= nfs_server_list_stop
,
1188 .show
= nfs_server_list_show
,
1191 static const struct file_operations nfs_server_list_fops
= {
1192 .open
= nfs_server_list_open
,
1194 .llseek
= seq_lseek
,
1195 .release
= seq_release
,
1198 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
);
1199 static void *nfs_volume_list_start(struct seq_file
*p
, loff_t
*pos
);
1200 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
);
1201 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
);
1202 static int nfs_volume_list_show(struct seq_file
*m
, void *v
);
1204 static struct seq_operations nfs_volume_list_ops
= {
1205 .start
= nfs_volume_list_start
,
1206 .next
= nfs_volume_list_next
,
1207 .stop
= nfs_volume_list_stop
,
1208 .show
= nfs_volume_list_show
,
1211 static const struct file_operations nfs_volume_list_fops
= {
1212 .open
= nfs_volume_list_open
,
1214 .llseek
= seq_lseek
,
1215 .release
= seq_release
,
1219 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1222 static int nfs_server_list_open(struct inode
*inode
, struct file
*file
)
1227 ret
= seq_open(file
, &nfs_server_list_ops
);
1231 m
= file
->private_data
;
1232 m
->private = PDE(inode
)->data
;
1238 * set up the iterator to start reading from the server list and return the first item
1240 static void *nfs_server_list_start(struct seq_file
*m
, loff_t
*_pos
)
1242 /* lock the list against modification */
1243 spin_lock(&nfs_client_lock
);
1244 return seq_list_start_head(&nfs_client_list
, *_pos
);
1248 * move to next server
1250 static void *nfs_server_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1252 return seq_list_next(v
, &nfs_client_list
, pos
);
1256 * clean up after reading from the transports list
1258 static void nfs_server_list_stop(struct seq_file
*p
, void *v
)
1260 spin_unlock(&nfs_client_lock
);
1264 * display a header line followed by a load of call lines
1266 static int nfs_server_list_show(struct seq_file
*m
, void *v
)
1268 struct nfs_client
*clp
;
1270 /* display header on line 1 */
1271 if (v
== &nfs_client_list
) {
1272 seq_puts(m
, "NV SERVER PORT USE HOSTNAME\n");
1276 /* display one transport per line on subsequent lines */
1277 clp
= list_entry(v
, struct nfs_client
, cl_share_link
);
1279 seq_printf(m
, "v%d %02x%02x%02x%02x %4hx %3d %s\n",
1281 NIPQUAD(clp
->cl_addr
.sin_addr
),
1282 ntohs(clp
->cl_addr
.sin_port
),
1283 atomic_read(&clp
->cl_count
),
1290 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1292 static int nfs_volume_list_open(struct inode
*inode
, struct file
*file
)
1297 ret
= seq_open(file
, &nfs_volume_list_ops
);
1301 m
= file
->private_data
;
1302 m
->private = PDE(inode
)->data
;
1308 * set up the iterator to start reading from the volume list and return the first item
1310 static void *nfs_volume_list_start(struct seq_file
*m
, loff_t
*_pos
)
1312 /* lock the list against modification */
1313 spin_lock(&nfs_client_lock
);
1314 return seq_list_start_head(&nfs_volume_list
, *_pos
);
1318 * move to next volume
1320 static void *nfs_volume_list_next(struct seq_file
*p
, void *v
, loff_t
*pos
)
1322 return seq_list_next(v
, &nfs_volume_list
, pos
);
1326 * clean up after reading from the transports list
1328 static void nfs_volume_list_stop(struct seq_file
*p
, void *v
)
1330 spin_unlock(&nfs_client_lock
);
1334 * display a header line followed by a load of call lines
1336 static int nfs_volume_list_show(struct seq_file
*m
, void *v
)
1338 struct nfs_server
*server
;
1339 struct nfs_client
*clp
;
1340 char dev
[8], fsid
[17];
1342 /* display header on line 1 */
1343 if (v
== &nfs_volume_list
) {
1344 seq_puts(m
, "NV SERVER PORT DEV FSID\n");
1347 /* display one transport per line on subsequent lines */
1348 server
= list_entry(v
, struct nfs_server
, master_link
);
1349 clp
= server
->nfs_client
;
1351 snprintf(dev
, 8, "%u:%u",
1352 MAJOR(server
->s_dev
), MINOR(server
->s_dev
));
1354 snprintf(fsid
, 17, "%llx:%llx",
1355 (unsigned long long) server
->fsid
.major
,
1356 (unsigned long long) server
->fsid
.minor
);
1358 seq_printf(m
, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n",
1360 NIPQUAD(clp
->cl_addr
.sin_addr
),
1361 ntohs(clp
->cl_addr
.sin_port
),
1369 * initialise the /proc/fs/nfsfs/ directory
1371 int __init
nfs_fs_proc_init(void)
1373 struct proc_dir_entry
*p
;
1375 proc_fs_nfs
= proc_mkdir("nfsfs", proc_root_fs
);
1379 proc_fs_nfs
->owner
= THIS_MODULE
;
1381 /* a file of servers with which we're dealing */
1382 p
= create_proc_entry("servers", S_IFREG
|S_IRUGO
, proc_fs_nfs
);
1386 p
->proc_fops
= &nfs_server_list_fops
;
1387 p
->owner
= THIS_MODULE
;
1389 /* a file of volumes that we have mounted */
1390 p
= create_proc_entry("volumes", S_IFREG
|S_IRUGO
, proc_fs_nfs
);
1394 p
->proc_fops
= &nfs_volume_list_fops
;
1395 p
->owner
= THIS_MODULE
;
1399 remove_proc_entry("servers", proc_fs_nfs
);
1401 remove_proc_entry("nfsfs", proc_root_fs
);
1407 * clean up the /proc/fs/nfsfs/ directory
1409 void nfs_fs_proc_exit(void)
1411 remove_proc_entry("volumes", proc_fs_nfs
);
1412 remove_proc_entry("servers", proc_fs_nfs
);
1413 remove_proc_entry("nfsfs", proc_root_fs
);
1416 #endif /* CONFIG_PROC_FS */