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"
50 #define NFSDBG_FACILITY NFSDBG_CLIENT
52 static DEFINE_SPINLOCK(nfs_client_lock);
53 static LIST_HEAD(nfs_client_list);
54 static LIST_HEAD(nfs_volume_list);
55 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
60 static struct rpc_version *nfs_version[5] = {
70 struct rpc_program nfs_program = {
72 .number = NFS_PROGRAM,
73 .nrvers = ARRAY_SIZE(nfs_version),
74 .version = nfs_version,
75 .stats = &nfs_rpcstat,
76 .pipe_dir_name = "/nfs",
79 struct rpc_stat nfs_rpcstat = {
80 .program = &nfs_program
84 #ifdef CONFIG_NFS_V3_ACL
85 static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
86 static struct rpc_version * nfsacl_version[] = {
87 [3] = &nfsacl_version3,
90 struct rpc_program nfsacl_program = {
92 .number = NFS_ACL_PROGRAM,
93 .nrvers = ARRAY_SIZE(nfsacl_version),
94 .version = nfsacl_version,
95 .stats = &nfsacl_rpcstat,
97 #endif /* CONFIG_NFS_V3_ACL */
99 struct nfs_client_initdata {
100 const char *hostname;
101 const struct sockaddr *addr;
103 const struct nfs_rpc_ops *rpc_ops;
109 * Allocate a shared client record
111 * Since these are allocated/deallocated very rarely, we don't
112 * bother putting them in a slab cache...
114 static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
116 struct nfs_client *clp;
117 struct rpc_cred *cred;
119 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
122 clp->rpc_ops = cl_init->rpc_ops;
124 if (cl_init->rpc_ops->version == 4) {
125 if (nfs_callback_up() < 0)
127 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
130 atomic_set(&clp->cl_count, 1);
131 clp->cl_cons_state = NFS_CS_INITING;
133 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
134 clp->cl_addrlen = cl_init->addrlen;
136 if (cl_init->hostname) {
137 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
138 if (!clp->cl_hostname)
142 INIT_LIST_HEAD(&clp->cl_superblocks);
143 clp->cl_rpcclient = ERR_PTR(-EINVAL);
145 clp->cl_proto = cl_init->proto;
148 INIT_LIST_HEAD(&clp->cl_delegations);
149 spin_lock_init(&clp->cl_lock);
150 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
151 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
152 clp->cl_boot_time = CURRENT_TIME;
153 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
154 clp->cl_minorversion = cl_init->minorversion;
156 cred = rpc_lookup_machine_cred();
158 clp->cl_machine_cred = cred;
160 nfs_fscache_get_client_cookie(clp);
165 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
173 static void nfs4_shutdown_client(struct nfs_client *clp)
176 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
177 nfs4_kill_renewd(clp);
178 BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners));
179 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
180 nfs_idmap_delete(clp);
182 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
187 * Clears/puts all minor version specific parts from an nfs_client struct
188 * reverting it to minorversion 0.
190 static void nfs4_clear_client_minor_version(struct nfs_client *clp)
192 #ifdef CONFIG_NFS_V4_1
193 if (nfs4_has_session(clp)) {
194 nfs4_destroy_session(clp->cl_session);
195 clp->cl_session = NULL;
198 clp->cl_call_sync = _nfs4_call_sync;
199 #endif /* CONFIG_NFS_V4_1 */
203 * Destroy a shared client record
205 static void nfs_free_client(struct nfs_client *clp)
207 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
209 nfs4_clear_client_minor_version(clp);
210 nfs4_shutdown_client(clp);
212 nfs_fscache_release_client_cookie(clp);
214 /* -EIO all pending I/O */
215 if (!IS_ERR(clp->cl_rpcclient))
216 rpc_shutdown_client(clp->cl_rpcclient);
218 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
221 if (clp->cl_machine_cred != NULL)
222 put_rpccred(clp->cl_machine_cred);
224 kfree(clp->cl_hostname);
227 dprintk("<-- nfs_free_client()\n");
231 * Release a reference to a shared client record
233 void nfs_put_client(struct nfs_client *clp)
238 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
240 if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) {
241 list_del(&clp->cl_share_link);
242 spin_unlock(&nfs_client_lock);
244 BUG_ON(!list_empty(&clp->cl_superblocks));
246 nfs_free_client(clp);
250 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
252 * Test if two ip6 socket addresses refer to the same socket by
253 * comparing relevant fields. The padding bytes specifically, are not
254 * compared. sin6_flowinfo is not compared because it only affects QoS
255 * and sin6_scope_id is only compared if the address is "link local"
256 * because "link local" addresses need only be unique to a specific
257 * link. Conversely, ordinary unicast addresses might have different
260 * The caller should ensure both socket addresses are AF_INET6.
262 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
263 const struct sockaddr *sa2)
265 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
266 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
268 if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL &&
269 sin1->sin6_scope_id != sin2->sin6_scope_id)
272 return ipv6_addr_equal(&sin1->sin6_addr, &sin1->sin6_addr);
274 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
275 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
276 const struct sockaddr *sa2)
283 * Test if two ip4 socket addresses refer to the same socket, by
284 * comparing relevant fields. The padding bytes specifically, are
287 * The caller should ensure both socket addresses are AF_INET.
289 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
290 const struct sockaddr *sa2)
292 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
293 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
295 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
298 static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
299 const struct sockaddr *sa2)
301 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
302 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
304 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
305 (sin1->sin6_port == sin2->sin6_port);
308 static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
309 const struct sockaddr *sa2)
311 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
312 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
314 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
315 (sin1->sin_port == sin2->sin_port);
319 * Test if two socket addresses represent the same actual socket,
320 * by comparing (only) relevant fields, excluding the port number.
322 static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
323 const struct sockaddr *sa2)
325 if (sa1->sa_family != sa2->sa_family)
328 switch (sa1->sa_family) {
330 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
332 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
338 * Test if two socket addresses represent the same actual socket,
339 * by comparing (only) relevant fields, including the port number.
341 static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
342 const struct sockaddr *sa2)
344 if (sa1->sa_family != sa2->sa_family)
347 switch (sa1->sa_family) {
349 return nfs_sockaddr_cmp_ip4(sa1, sa2);
351 return nfs_sockaddr_cmp_ip6(sa1, sa2);
357 * Find a client by IP address and protocol version
358 * - returns NULL if no such client
360 struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion)
362 struct nfs_client *clp;
364 spin_lock(&nfs_client_lock);
365 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
366 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
368 /* Don't match clients that failed to initialise properly */
369 if (clp->cl_cons_state != NFS_CS_READY)
372 /* Different NFS versions cannot share the same nfs_client */
373 if (clp->rpc_ops->version != nfsversion)
376 /* Match only the IP address, not the port number */
377 if (!nfs_sockaddr_match_ipaddr(addr, clap))
380 atomic_inc(&clp->cl_count);
381 spin_unlock(&nfs_client_lock);
384 spin_unlock(&nfs_client_lock);
389 * Find a client by IP address and protocol version
390 * - returns NULL if no such client
392 struct nfs_client *nfs_find_client_next(struct nfs_client *clp)
394 struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr;
395 u32 nfsvers = clp->rpc_ops->version;
397 spin_lock(&nfs_client_lock);
398 list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) {
399 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
401 /* Don't match clients that failed to initialise properly */
402 if (clp->cl_cons_state != NFS_CS_READY)
405 /* Different NFS versions cannot share the same nfs_client */
406 if (clp->rpc_ops->version != nfsvers)
409 /* Match only the IP address, not the port number */
410 if (!nfs_sockaddr_match_ipaddr(sap, clap))
413 atomic_inc(&clp->cl_count);
414 spin_unlock(&nfs_client_lock);
417 spin_unlock(&nfs_client_lock);
422 * Find an nfs_client on the list that matches the initialisation data
425 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
427 struct nfs_client *clp;
428 const struct sockaddr *sap = data->addr;
430 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
431 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
432 /* Don't match clients that failed to initialise properly */
433 if (clp->cl_cons_state < 0)
436 /* Different NFS versions cannot share the same nfs_client */
437 if (clp->rpc_ops != data->rpc_ops)
440 if (clp->cl_proto != data->proto)
442 /* Match nfsv4 minorversion */
443 if (clp->cl_minorversion != data->minorversion)
445 /* Match the full socket address */
446 if (!nfs_sockaddr_cmp(sap, clap))
449 atomic_inc(&clp->cl_count);
456 * Look up a client by IP address and protocol version
457 * - creates a new record if one doesn't yet exist
459 static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
461 struct nfs_client *clp, *new = NULL;
464 dprintk("--> nfs_get_client(%s,v%u)\n",
465 cl_init->hostname ?: "", cl_init->rpc_ops->version);
467 /* see if the client already exists */
469 spin_lock(&nfs_client_lock);
471 clp = nfs_match_client(cl_init);
477 spin_unlock(&nfs_client_lock);
479 new = nfs_alloc_client(cl_init);
482 return ERR_PTR(-ENOMEM);
484 /* install a new client and return with it unready */
487 list_add(&clp->cl_share_link, &nfs_client_list);
488 spin_unlock(&nfs_client_lock);
489 dprintk("--> nfs_get_client() = %p [new]\n", clp);
492 /* found an existing client
493 * - make sure it's ready before returning
496 spin_unlock(&nfs_client_lock);
499 nfs_free_client(new);
501 error = wait_event_killable(nfs_client_active_wq,
502 clp->cl_cons_state != NFS_CS_INITING);
505 return ERR_PTR(-ERESTARTSYS);
508 if (clp->cl_cons_state < NFS_CS_READY) {
509 error = clp->cl_cons_state;
511 return ERR_PTR(error);
514 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
516 dprintk("--> nfs_get_client() = %p [share]\n", clp);
521 * Mark a server as ready or failed
523 static void nfs_mark_client_ready(struct nfs_client *clp, int state)
525 clp->cl_cons_state = state;
526 wake_up_all(&nfs_client_active_wq);
530 * Initialise the timeout values for a connection
532 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
533 unsigned int timeo, unsigned int retrans)
535 to->to_initval = timeo * HZ / 10;
536 to->to_retries = retrans;
539 case XPRT_TRANSPORT_TCP:
540 case XPRT_TRANSPORT_RDMA:
541 if (to->to_retries == 0)
542 to->to_retries = NFS_DEF_TCP_RETRANS;
543 if (to->to_initval == 0)
544 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
545 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
546 to->to_initval = NFS_MAX_TCP_TIMEOUT;
547 to->to_increment = to->to_initval;
548 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
549 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
550 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
551 if (to->to_maxval < to->to_initval)
552 to->to_maxval = to->to_initval;
553 to->to_exponential = 0;
555 case XPRT_TRANSPORT_UDP:
556 if (to->to_retries == 0)
557 to->to_retries = NFS_DEF_UDP_RETRANS;
559 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
560 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
561 to->to_initval = NFS_MAX_UDP_TIMEOUT;
562 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
563 to->to_exponential = 1;
571 * Create an RPC client handle
573 static int nfs_create_rpc_client(struct nfs_client *clp,
574 const struct rpc_timeout *timeparms,
575 rpc_authflavor_t flavor,
576 int discrtry, int noresvport)
578 struct rpc_clnt *clnt = NULL;
579 struct rpc_create_args args = {
580 .protocol = clp->cl_proto,
581 .address = (struct sockaddr *)&clp->cl_addr,
582 .addrsize = clp->cl_addrlen,
583 .timeout = timeparms,
584 .servername = clp->cl_hostname,
585 .program = &nfs_program,
586 .version = clp->rpc_ops->version,
587 .authflavor = flavor,
591 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
593 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
595 if (!IS_ERR(clp->cl_rpcclient))
598 clnt = rpc_create(&args);
600 dprintk("%s: cannot create RPC client. Error = %ld\n",
601 __func__, PTR_ERR(clnt));
602 return PTR_ERR(clnt);
605 clp->cl_rpcclient = clnt;
610 * Version 2 or 3 client destruction
612 static void nfs_destroy_server(struct nfs_server *server)
614 if (!(server->flags & NFS_MOUNT_NONLM))
615 nlmclnt_done(server->nlm_host);
619 * Version 2 or 3 lockd setup
621 static int nfs_start_lockd(struct nfs_server *server)
623 struct nlm_host *host;
624 struct nfs_client *clp = server->nfs_client;
625 struct nlmclnt_initdata nlm_init = {
626 .hostname = clp->cl_hostname,
627 .address = (struct sockaddr *)&clp->cl_addr,
628 .addrlen = clp->cl_addrlen,
629 .protocol = server->flags & NFS_MOUNT_TCP ?
630 IPPROTO_TCP : IPPROTO_UDP,
631 .nfs_version = clp->rpc_ops->version,
632 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
636 if (nlm_init.nfs_version > 3)
638 if (server->flags & NFS_MOUNT_NONLM)
641 host = nlmclnt_init(&nlm_init);
643 return PTR_ERR(host);
645 server->nlm_host = host;
646 server->destroy = nfs_destroy_server;
651 * Initialise an NFSv3 ACL client connection
653 #ifdef CONFIG_NFS_V3_ACL
654 static void nfs_init_server_aclclient(struct nfs_server *server)
656 if (server->nfs_client->rpc_ops->version != 3)
658 if (server->flags & NFS_MOUNT_NOACL)
661 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
662 if (IS_ERR(server->client_acl))
665 /* No errors! Assume that Sun nfsacls are supported */
666 server->caps |= NFS_CAP_ACLS;
670 server->caps &= ~NFS_CAP_ACLS;
673 static inline void nfs_init_server_aclclient(struct nfs_server *server)
675 server->flags &= ~NFS_MOUNT_NOACL;
676 server->caps &= ~NFS_CAP_ACLS;
681 * Create a general RPC client
683 static int nfs_init_server_rpcclient(struct nfs_server *server,
684 const struct rpc_timeout *timeo,
685 rpc_authflavor_t pseudoflavour)
687 struct nfs_client *clp = server->nfs_client;
689 server->client = rpc_clone_client(clp->cl_rpcclient);
690 if (IS_ERR(server->client)) {
691 dprintk("%s: couldn't create rpc_client!\n", __func__);
692 return PTR_ERR(server->client);
695 memcpy(&server->client->cl_timeout_default,
697 sizeof(server->client->cl_timeout_default));
698 server->client->cl_timeout = &server->client->cl_timeout_default;
700 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
701 struct rpc_auth *auth;
703 auth = rpcauth_create(pseudoflavour, server->client);
705 dprintk("%s: couldn't create credcache!\n", __func__);
706 return PTR_ERR(auth);
709 server->client->cl_softrtry = 0;
710 if (server->flags & NFS_MOUNT_SOFT)
711 server->client->cl_softrtry = 1;
717 * Initialise an NFS2 or NFS3 client
719 static int nfs_init_client(struct nfs_client *clp,
720 const struct rpc_timeout *timeparms,
721 const struct nfs_parsed_mount_data *data)
725 if (clp->cl_cons_state == NFS_CS_READY) {
726 /* the client is already initialised */
727 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
732 * Create a client RPC handle for doing FSSTAT with UNIX auth only
733 * - RFC 2623, sec 2.3.2
735 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
736 0, data->flags & NFS_MOUNT_NORESVPORT);
739 nfs_mark_client_ready(clp, NFS_CS_READY);
743 nfs_mark_client_ready(clp, error);
744 dprintk("<-- nfs_init_client() = xerror %d\n", error);
749 * Create a version 2 or 3 client
751 static int nfs_init_server(struct nfs_server *server,
752 const struct nfs_parsed_mount_data *data)
754 struct nfs_client_initdata cl_init = {
755 .hostname = data->nfs_server.hostname,
756 .addr = (const struct sockaddr *)&data->nfs_server.address,
757 .addrlen = data->nfs_server.addrlen,
758 .rpc_ops = &nfs_v2_clientops,
759 .proto = data->nfs_server.protocol,
761 struct rpc_timeout timeparms;
762 struct nfs_client *clp;
765 dprintk("--> nfs_init_server()\n");
768 if (data->flags & NFS_MOUNT_VER3)
769 cl_init.rpc_ops = &nfs_v3_clientops;
772 /* Allocate or find a client reference we can use */
773 clp = nfs_get_client(&cl_init);
775 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
779 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
780 data->timeo, data->retrans);
781 error = nfs_init_client(clp, &timeparms, data);
785 server->nfs_client = clp;
787 /* Initialise the client representation from the mount data */
788 server->flags = data->flags;
789 server->options = data->options;
792 server->rsize = nfs_block_size(data->rsize, NULL);
794 server->wsize = nfs_block_size(data->wsize, NULL);
796 server->acregmin = data->acregmin * HZ;
797 server->acregmax = data->acregmax * HZ;
798 server->acdirmin = data->acdirmin * HZ;
799 server->acdirmax = data->acdirmax * HZ;
801 /* Start lockd here, before we might error out */
802 error = nfs_start_lockd(server);
806 server->port = data->nfs_server.port;
808 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
812 /* Preserve the values of mount_server-related mount options */
813 if (data->mount_server.addrlen) {
814 memcpy(&server->mountd_address, &data->mount_server.address,
815 data->mount_server.addrlen);
816 server->mountd_addrlen = data->mount_server.addrlen;
818 server->mountd_version = data->mount_server.version;
819 server->mountd_port = data->mount_server.port;
820 server->mountd_protocol = data->mount_server.protocol;
822 server->namelen = data->namlen;
823 /* Create a client RPC handle for the NFSv3 ACL management interface */
824 nfs_init_server_aclclient(server);
825 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
829 server->nfs_client = NULL;
831 dprintk("<-- nfs_init_server() = xerror %d\n", error);
836 * Load up the server record from information gained in an fsinfo record
838 static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo)
840 unsigned long max_rpc_payload;
842 /* Work out a lot of parameters */
843 if (server->rsize == 0)
844 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
845 if (server->wsize == 0)
846 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
848 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
849 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
850 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
851 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
853 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
854 if (server->rsize > max_rpc_payload)
855 server->rsize = max_rpc_payload;
856 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
857 server->rsize = NFS_MAX_FILE_IO_SIZE;
858 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
860 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
862 if (server->wsize > max_rpc_payload)
863 server->wsize = max_rpc_payload;
864 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
865 server->wsize = NFS_MAX_FILE_IO_SIZE;
866 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
867 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
869 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
870 if (server->dtsize > PAGE_CACHE_SIZE)
871 server->dtsize = PAGE_CACHE_SIZE;
872 if (server->dtsize > server->rsize)
873 server->dtsize = server->rsize;
875 if (server->flags & NFS_MOUNT_NOAC) {
876 server->acregmin = server->acregmax = 0;
877 server->acdirmin = server->acdirmax = 0;
880 server->maxfilesize = fsinfo->maxfilesize;
882 /* We're airborne Set socket buffersize */
883 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
887 * Probe filesystem information, including the FSID on v2/v3
889 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
891 struct nfs_fsinfo fsinfo;
892 struct nfs_client *clp = server->nfs_client;
895 dprintk("--> nfs_probe_fsinfo()\n");
897 if (clp->rpc_ops->set_capabilities != NULL) {
898 error = clp->rpc_ops->set_capabilities(server, mntfh);
903 fsinfo.fattr = fattr;
904 nfs_fattr_init(fattr);
905 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
909 nfs_server_set_fsinfo(server, &fsinfo);
910 error = bdi_init(&server->backing_dev_info);
915 /* Get some general file system info */
916 if (server->namelen == 0) {
917 struct nfs_pathconf pathinfo;
919 pathinfo.fattr = fattr;
920 nfs_fattr_init(fattr);
922 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
923 server->namelen = pathinfo.max_namelen;
926 dprintk("<-- nfs_probe_fsinfo() = 0\n");
930 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
935 * Copy useful information when duplicating a server record
937 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
939 target->flags = source->flags;
940 target->acregmin = source->acregmin;
941 target->acregmax = source->acregmax;
942 target->acdirmin = source->acdirmin;
943 target->acdirmax = source->acdirmax;
944 target->caps = source->caps;
948 * Allocate and initialise a server record
950 static struct nfs_server *nfs_alloc_server(void)
952 struct nfs_server *server;
954 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
958 server->client = server->client_acl = ERR_PTR(-EINVAL);
960 /* Zero out the NFS state stuff */
961 INIT_LIST_HEAD(&server->client_link);
962 INIT_LIST_HEAD(&server->master_link);
964 atomic_set(&server->active, 0);
966 server->io_stats = nfs_alloc_iostats();
967 if (!server->io_stats) {
976 * Free up a server record
978 void nfs_free_server(struct nfs_server *server)
980 dprintk("--> nfs_free_server()\n");
982 spin_lock(&nfs_client_lock);
983 list_del(&server->client_link);
984 list_del(&server->master_link);
985 spin_unlock(&nfs_client_lock);
987 if (server->destroy != NULL)
988 server->destroy(server);
990 if (!IS_ERR(server->client_acl))
991 rpc_shutdown_client(server->client_acl);
992 if (!IS_ERR(server->client))
993 rpc_shutdown_client(server->client);
995 nfs_put_client(server->nfs_client);
997 nfs_free_iostats(server->io_stats);
998 bdi_destroy(&server->backing_dev_info);
1000 nfs_release_automount_timer();
1001 dprintk("<-- nfs_free_server()\n");
1005 * Create a version 2 or 3 volume record
1006 * - keyed on server and FSID
1008 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1009 struct nfs_fh *mntfh)
1011 struct nfs_server *server;
1012 struct nfs_fattr fattr;
1015 server = nfs_alloc_server();
1017 return ERR_PTR(-ENOMEM);
1019 /* Get a client representation */
1020 error = nfs_init_server(server, data);
1024 BUG_ON(!server->nfs_client);
1025 BUG_ON(!server->nfs_client->rpc_ops);
1026 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1028 /* Probe the root fh to retrieve its FSID */
1029 error = nfs_probe_fsinfo(server, mntfh, &fattr);
1032 if (server->nfs_client->rpc_ops->version == 3) {
1033 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1034 server->namelen = NFS3_MAXNAMLEN;
1035 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1036 server->caps |= NFS_CAP_READDIRPLUS;
1038 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1039 server->namelen = NFS2_MAXNAMLEN;
1042 if (!(fattr.valid & NFS_ATTR_FATTR)) {
1043 error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr);
1045 dprintk("nfs_create_server: getattr error = %d\n", -error);
1049 memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid));
1051 dprintk("Server FSID: %llx:%llx\n",
1052 (unsigned long long) server->fsid.major,
1053 (unsigned long long) server->fsid.minor);
1055 BUG_ON(!server->nfs_client);
1056 BUG_ON(!server->nfs_client->rpc_ops);
1057 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1059 spin_lock(&nfs_client_lock);
1060 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
1061 list_add_tail(&server->master_link, &nfs_volume_list);
1062 spin_unlock(&nfs_client_lock);
1064 server->mount_time = jiffies;
1068 nfs_free_server(server);
1069 return ERR_PTR(error);
1072 #ifdef CONFIG_NFS_V4
1074 * Initialize the minor version specific parts of an NFS4 client record
1076 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1078 clp->cl_call_sync = _nfs4_call_sync;
1080 #if defined(CONFIG_NFS_V4_1)
1081 if (clp->cl_minorversion) {
1082 struct nfs4_session *session = NULL;
1084 * Create the session and mark it expired.
1085 * When a SEQUENCE operation encounters the expired session
1086 * it will do session recovery to initialize it.
1088 session = nfs4_alloc_session(clp);
1092 clp->cl_session = session;
1093 clp->cl_call_sync = _nfs4_call_sync_session;
1095 #endif /* CONFIG_NFS_V4_1 */
1101 * Initialise an NFS4 client record
1103 static int nfs4_init_client(struct nfs_client *clp,
1104 const struct rpc_timeout *timeparms,
1105 const char *ip_addr,
1106 rpc_authflavor_t authflavour,
1111 if (clp->cl_cons_state == NFS_CS_READY) {
1112 /* the client is initialised already */
1113 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1117 /* Check NFS protocol revision and initialize RPC op vector */
1118 clp->rpc_ops = &nfs_v4_clientops;
1120 error = nfs_create_rpc_client(clp, timeparms, authflavour,
1121 1, flags & NFS_MOUNT_NORESVPORT);
1124 memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1126 error = nfs_idmap_new(clp);
1128 dprintk("%s: failed to create idmapper. Error = %d\n",
1132 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1134 error = nfs4_init_client_minor_version(clp);
1138 nfs_mark_client_ready(clp, NFS_CS_READY);
1142 nfs_mark_client_ready(clp, error);
1143 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1148 * Set up an NFS4 client
1150 static int nfs4_set_client(struct nfs_server *server,
1151 const char *hostname,
1152 const struct sockaddr *addr,
1153 const size_t addrlen,
1154 const char *ip_addr,
1155 rpc_authflavor_t authflavour,
1156 int proto, const struct rpc_timeout *timeparms,
1159 struct nfs_client_initdata cl_init = {
1160 .hostname = hostname,
1163 .rpc_ops = &nfs_v4_clientops,
1165 .minorversion = minorversion,
1167 struct nfs_client *clp;
1170 dprintk("--> nfs4_set_client()\n");
1172 /* Allocate or find a client reference we can use */
1173 clp = nfs_get_client(&cl_init);
1175 error = PTR_ERR(clp);
1178 error = nfs4_init_client(clp, timeparms, ip_addr, authflavour,
1183 server->nfs_client = clp;
1184 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1188 nfs_put_client(clp);
1190 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1195 * Initialize a session.
1196 * Note: save the mount rsize and wsize for create_server negotiation.
1198 static void nfs4_init_session(struct nfs_client *clp,
1199 unsigned int wsize, unsigned int rsize)
1201 #if defined(CONFIG_NFS_V4_1)
1202 if (nfs4_has_session(clp)) {
1203 clp->cl_session->fc_attrs.max_rqst_sz = wsize;
1204 clp->cl_session->fc_attrs.max_resp_sz = rsize;
1206 #endif /* CONFIG_NFS_V4_1 */
1210 * Create a version 4 volume record
1212 static int nfs4_init_server(struct nfs_server *server,
1213 const struct nfs_parsed_mount_data *data)
1215 struct rpc_timeout timeparms;
1218 dprintk("--> nfs4_init_server()\n");
1220 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1221 data->timeo, data->retrans);
1223 /* Initialise the client representation from the mount data */
1224 server->flags = data->flags;
1225 server->caps |= NFS_CAP_ATOMIC_OPEN;
1226 server->options = data->options;
1228 /* Get a client record */
1229 error = nfs4_set_client(server,
1230 data->nfs_server.hostname,
1231 (const struct sockaddr *)&data->nfs_server.address,
1232 data->nfs_server.addrlen,
1233 data->client_address,
1234 data->auth_flavors[0],
1235 data->nfs_server.protocol,
1237 data->minorversion);
1242 server->rsize = nfs_block_size(data->rsize, NULL);
1244 server->wsize = nfs_block_size(data->wsize, NULL);
1246 server->acregmin = data->acregmin * HZ;
1247 server->acregmax = data->acregmax * HZ;
1248 server->acdirmin = data->acdirmin * HZ;
1249 server->acdirmax = data->acdirmax * HZ;
1251 server->port = data->nfs_server.port;
1253 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1257 dprintk("<-- nfs4_init_server() = %d\n", error);
1262 * Create a version 4 volume record
1263 * - keyed on server and FSID
1265 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1266 struct nfs_fh *mntfh)
1268 struct nfs_fattr fattr;
1269 struct nfs_server *server;
1272 dprintk("--> nfs4_create_server()\n");
1274 server = nfs_alloc_server();
1276 return ERR_PTR(-ENOMEM);
1278 /* set up the general RPC client */
1279 error = nfs4_init_server(server, data);
1283 BUG_ON(!server->nfs_client);
1284 BUG_ON(!server->nfs_client->rpc_ops);
1285 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1287 nfs4_init_session(server->nfs_client, server->wsize, server->rsize);
1289 /* Probe the root fh to retrieve its FSID */
1290 error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path);
1294 dprintk("Server FSID: %llx:%llx\n",
1295 (unsigned long long) server->fsid.major,
1296 (unsigned long long) server->fsid.minor);
1297 dprintk("Mount FH: %d\n", mntfh->size);
1299 error = nfs_probe_fsinfo(server, mntfh, &fattr);
1303 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1304 server->namelen = NFS4_MAXNAMLEN;
1306 BUG_ON(!server->nfs_client);
1307 BUG_ON(!server->nfs_client->rpc_ops);
1308 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1310 spin_lock(&nfs_client_lock);
1311 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
1312 list_add_tail(&server->master_link, &nfs_volume_list);
1313 spin_unlock(&nfs_client_lock);
1315 server->mount_time = jiffies;
1316 dprintk("<-- nfs4_create_server() = %p\n", server);
1320 nfs_free_server(server);
1321 dprintk("<-- nfs4_create_server() = error %d\n", error);
1322 return ERR_PTR(error);
1326 * Create an NFS4 referral server record
1328 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1329 struct nfs_fh *mntfh)
1331 struct nfs_client *parent_client;
1332 struct nfs_server *server, *parent_server;
1333 struct nfs_fattr fattr;
1336 dprintk("--> nfs4_create_referral_server()\n");
1338 server = nfs_alloc_server();
1340 return ERR_PTR(-ENOMEM);
1342 parent_server = NFS_SB(data->sb);
1343 parent_client = parent_server->nfs_client;
1345 /* Initialise the client representation from the parent server */
1346 nfs_server_copy_userdata(server, parent_server);
1347 server->caps |= NFS_CAP_ATOMIC_OPEN;
1349 /* Get a client representation.
1350 * Note: NFSv4 always uses TCP, */
1351 error = nfs4_set_client(server, data->hostname,
1354 parent_client->cl_ipaddr,
1356 parent_server->client->cl_xprt->prot,
1357 parent_server->client->cl_timeout,
1358 parent_client->cl_minorversion);
1362 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1366 BUG_ON(!server->nfs_client);
1367 BUG_ON(!server->nfs_client->rpc_ops);
1368 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1370 /* Probe the root fh to retrieve its FSID and filehandle */
1371 error = nfs4_path_walk(server, mntfh, data->mnt_path);
1375 /* probe the filesystem info for this server filesystem */
1376 error = nfs_probe_fsinfo(server, mntfh, &fattr);
1380 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1381 server->namelen = NFS4_MAXNAMLEN;
1383 dprintk("Referral FSID: %llx:%llx\n",
1384 (unsigned long long) server->fsid.major,
1385 (unsigned long long) server->fsid.minor);
1387 spin_lock(&nfs_client_lock);
1388 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
1389 list_add_tail(&server->master_link, &nfs_volume_list);
1390 spin_unlock(&nfs_client_lock);
1392 server->mount_time = jiffies;
1394 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1398 nfs_free_server(server);
1399 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1400 return ERR_PTR(error);
1403 #endif /* CONFIG_NFS_V4 */
1406 * Clone an NFS2, NFS3 or NFS4 server record
1408 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1410 struct nfs_fattr *fattr)
1412 struct nfs_server *server;
1413 struct nfs_fattr fattr_fsinfo;
1416 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1417 (unsigned long long) fattr->fsid.major,
1418 (unsigned long long) fattr->fsid.minor);
1420 server = nfs_alloc_server();
1422 return ERR_PTR(-ENOMEM);
1424 /* Copy data from the source */
1425 server->nfs_client = source->nfs_client;
1426 atomic_inc(&server->nfs_client->cl_count);
1427 nfs_server_copy_userdata(server, source);
1429 server->fsid = fattr->fsid;
1431 error = nfs_init_server_rpcclient(server,
1432 source->client->cl_timeout,
1433 source->client->cl_auth->au_flavor);
1435 goto out_free_server;
1436 if (!IS_ERR(source->client_acl))
1437 nfs_init_server_aclclient(server);
1439 /* probe the filesystem info for this server filesystem */
1440 error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo);
1442 goto out_free_server;
1444 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1445 server->namelen = NFS4_MAXNAMLEN;
1447 dprintk("Cloned FSID: %llx:%llx\n",
1448 (unsigned long long) server->fsid.major,
1449 (unsigned long long) server->fsid.minor);
1451 error = nfs_start_lockd(server);
1453 goto out_free_server;
1455 spin_lock(&nfs_client_lock);
1456 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
1457 list_add_tail(&server->master_link, &nfs_volume_list);
1458 spin_unlock(&nfs_client_lock);
1460 server->mount_time = jiffies;
1462 dprintk("<-- nfs_clone_server() = %p\n", server);
1466 nfs_free_server(server);
1467 dprintk("<-- nfs_clone_server() = error %d\n", error);
1468 return ERR_PTR(error);
1471 #ifdef CONFIG_PROC_FS
1472 static struct proc_dir_entry *proc_fs_nfs;
1474 static int nfs_server_list_open(struct inode *inode, struct file *file);
1475 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1476 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1477 static void nfs_server_list_stop(struct seq_file *p, void *v);
1478 static int nfs_server_list_show(struct seq_file *m, void *v);
1480 static struct seq_operations nfs_server_list_ops = {
1481 .start = nfs_server_list_start,
1482 .next = nfs_server_list_next,
1483 .stop = nfs_server_list_stop,
1484 .show = nfs_server_list_show,
1487 static const struct file_operations nfs_server_list_fops = {
1488 .open = nfs_server_list_open,
1490 .llseek = seq_lseek,
1491 .release = seq_release,
1492 .owner = THIS_MODULE,
1495 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1496 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1497 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1498 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1499 static int nfs_volume_list_show(struct seq_file *m, void *v);
1501 static struct seq_operations nfs_volume_list_ops = {
1502 .start = nfs_volume_list_start,
1503 .next = nfs_volume_list_next,
1504 .stop = nfs_volume_list_stop,
1505 .show = nfs_volume_list_show,
1508 static const struct file_operations nfs_volume_list_fops = {
1509 .open = nfs_volume_list_open,
1511 .llseek = seq_lseek,
1512 .release = seq_release,
1513 .owner = THIS_MODULE,
1517 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1520 static int nfs_server_list_open(struct inode *inode, struct file *file)
1525 ret = seq_open(file, &nfs_server_list_ops);
1529 m = file->private_data;
1530 m->private = PDE(inode)->data;
1536 * set up the iterator to start reading from the server list and return the first item
1538 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1540 /* lock the list against modification */
1541 spin_lock(&nfs_client_lock);
1542 return seq_list_start_head(&nfs_client_list, *_pos);
1546 * move to next server
1548 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1550 return seq_list_next(v, &nfs_client_list, pos);
1554 * clean up after reading from the transports list
1556 static void nfs_server_list_stop(struct seq_file *p, void *v)
1558 spin_unlock(&nfs_client_lock);
1562 * display a header line followed by a load of call lines
1564 static int nfs_server_list_show(struct seq_file *m, void *v)
1566 struct nfs_client *clp;
1568 /* display header on line 1 */
1569 if (v == &nfs_client_list) {
1570 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1574 /* display one transport per line on subsequent lines */
1575 clp = list_entry(v, struct nfs_client, cl_share_link);
1577 seq_printf(m, "v%u %s %s %3d %s\n",
1578 clp->rpc_ops->version,
1579 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1580 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1581 atomic_read(&clp->cl_count),
1588 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1590 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1595 ret = seq_open(file, &nfs_volume_list_ops);
1599 m = file->private_data;
1600 m->private = PDE(inode)->data;
1606 * set up the iterator to start reading from the volume list and return the first item
1608 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1610 /* lock the list against modification */
1611 spin_lock(&nfs_client_lock);
1612 return seq_list_start_head(&nfs_volume_list, *_pos);
1616 * move to next volume
1618 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1620 return seq_list_next(v, &nfs_volume_list, pos);
1624 * clean up after reading from the transports list
1626 static void nfs_volume_list_stop(struct seq_file *p, void *v)
1628 spin_unlock(&nfs_client_lock);
1632 * display a header line followed by a load of call lines
1634 static int nfs_volume_list_show(struct seq_file *m, void *v)
1636 struct nfs_server *server;
1637 struct nfs_client *clp;
1638 char dev[8], fsid[17];
1640 /* display header on line 1 */
1641 if (v == &nfs_volume_list) {
1642 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
1645 /* display one transport per line on subsequent lines */
1646 server = list_entry(v, struct nfs_server, master_link);
1647 clp = server->nfs_client;
1649 snprintf(dev, 8, "%u:%u",
1650 MAJOR(server->s_dev), MINOR(server->s_dev));
1652 snprintf(fsid, 17, "%llx:%llx",
1653 (unsigned long long) server->fsid.major,
1654 (unsigned long long) server->fsid.minor);
1656 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
1657 clp->rpc_ops->version,
1658 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1659 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1662 nfs_server_fscache_state(server));
1668 * initialise the /proc/fs/nfsfs/ directory
1670 int __init nfs_fs_proc_init(void)
1672 struct proc_dir_entry *p;
1674 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
1678 /* a file of servers with which we're dealing */
1679 p = proc_create("servers", S_IFREG|S_IRUGO,
1680 proc_fs_nfs, &nfs_server_list_fops);
1684 /* a file of volumes that we have mounted */
1685 p = proc_create("volumes", S_IFREG|S_IRUGO,
1686 proc_fs_nfs, &nfs_volume_list_fops);
1692 remove_proc_entry("servers", proc_fs_nfs);
1694 remove_proc_entry("fs/nfsfs", NULL);
1700 * clean up the /proc/fs/nfsfs/ directory
1702 void nfs_fs_proc_exit(void)
1704 remove_proc_entry("volumes", proc_fs_nfs);
1705 remove_proc_entry("servers", proc_fs_nfs);
1706 remove_proc_entry("fs/nfsfs", NULL);
1709 #endif /* CONFIG_PROC_FS */