1 /* client.c: NFS client sharing and management code
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include <linux/time.h>
17 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/stat.h>
21 #include <linux/errno.h>
22 #include <linux/unistd.h>
23 #include <linux/sunrpc/clnt.h>
24 #include <linux/sunrpc/stats.h>
25 #include <linux/sunrpc/metrics.h>
26 #include <linux/sunrpc/xprtsock.h>
27 #include <linux/sunrpc/xprtrdma.h>
28 #include <linux/nfs_fs.h>
29 #include <linux/nfs_mount.h>
30 #include <linux/nfs4_mount.h>
31 #include <linux/lockd/bind.h>
32 #include <linux/seq_file.h>
33 #include <linux/mount.h>
34 #include <linux/nfs_idmap.h>
35 #include <linux/vfs.h>
36 #include <linux/inet.h>
37 #include <linux/in6.h>
38 #include <linux/slab.h>
39 #include <linux/idr.h>
41 #include <linux/nfs_xdr.h>
42 #include <linux/sunrpc/bc_xprt.h>
43 #include <linux/nsproxy.h>
44 #include <linux/pid_namespace.h>
46 #include <asm/system.h>
50 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_CLIENT
59 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
63 * Get a unique NFSv4.0 callback identifier which will be used
64 * by the V4.0 callback service to lookup the nfs_client struct
66 static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
69 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
71 if (clp->rpc_ops->version != 4 || minorversion != 0)
74 if (!idr_pre_get(&nn->cb_ident_idr, GFP_KERNEL))
76 spin_lock(&nn->nfs_client_lock);
77 ret = idr_get_new(&nn->cb_ident_idr, clp, &clp->cl_cb_ident);
78 spin_unlock(&nn->nfs_client_lock);
83 #endif /* CONFIG_NFS_V4 */
86 * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
88 static bool nfs4_disable_idmapping = true;
93 static const struct rpc_version *nfs_version[5] = {
103 const struct rpc_program nfs_program = {
105 .number = NFS_PROGRAM,
106 .nrvers = ARRAY_SIZE(nfs_version),
107 .version = nfs_version,
108 .stats = &nfs_rpcstat,
109 .pipe_dir_name = NFS_PIPE_DIRNAME,
112 struct rpc_stat nfs_rpcstat = {
113 .program = &nfs_program
117 #ifdef CONFIG_NFS_V3_ACL
118 static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
119 static const struct rpc_version *nfsacl_version[] = {
120 [3] = &nfsacl_version3,
123 const struct rpc_program nfsacl_program = {
125 .number = NFS_ACL_PROGRAM,
126 .nrvers = ARRAY_SIZE(nfsacl_version),
127 .version = nfsacl_version,
128 .stats = &nfsacl_rpcstat,
130 #endif /* CONFIG_NFS_V3_ACL */
132 struct nfs_client_initdata {
133 const char *hostname;
134 const struct sockaddr *addr;
136 const struct nfs_rpc_ops *rpc_ops;
143 * Allocate a shared client record
145 * Since these are allocated/deallocated very rarely, we don't
146 * bother putting them in a slab cache...
148 static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
150 struct nfs_client *clp;
151 struct rpc_cred *cred;
154 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
157 clp->rpc_ops = cl_init->rpc_ops;
159 atomic_set(&clp->cl_count, 1);
160 clp->cl_cons_state = NFS_CS_INITING;
162 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
163 clp->cl_addrlen = cl_init->addrlen;
165 if (cl_init->hostname) {
167 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
168 if (!clp->cl_hostname)
172 INIT_LIST_HEAD(&clp->cl_superblocks);
173 clp->cl_rpcclient = ERR_PTR(-EINVAL);
175 clp->cl_proto = cl_init->proto;
176 clp->net = get_net(cl_init->net);
179 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
183 spin_lock_init(&clp->cl_lock);
184 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
185 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
186 clp->cl_boot_time = CURRENT_TIME;
187 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
188 clp->cl_minorversion = cl_init->minorversion;
189 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
191 cred = rpc_lookup_machine_cred("*");
193 clp->cl_machine_cred = cred;
194 nfs_fscache_get_client_cookie(clp);
205 #ifdef CONFIG_NFS_V4_1
206 static void nfs4_shutdown_session(struct nfs_client *clp)
208 if (nfs4_has_session(clp)) {
209 nfs4_deviceid_purge_client(clp);
210 nfs4_destroy_session(clp->cl_session);
214 #else /* CONFIG_NFS_V4_1 */
215 static void nfs4_shutdown_session(struct nfs_client *clp)
218 #endif /* CONFIG_NFS_V4_1 */
221 * Destroy the NFS4 callback service
223 static void nfs4_destroy_callback(struct nfs_client *clp)
225 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
226 nfs_callback_down(clp->cl_mvops->minor_version);
229 static void nfs4_shutdown_client(struct nfs_client *clp)
231 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
232 nfs4_kill_renewd(clp);
233 nfs4_shutdown_session(clp);
234 nfs4_destroy_callback(clp);
235 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
236 nfs_idmap_delete(clp);
238 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
241 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
242 void nfs_cleanup_cb_ident_idr(struct net *net)
244 struct nfs_net *nn = net_generic(net, nfs_net_id);
246 idr_destroy(&nn->cb_ident_idr);
249 /* nfs_client_lock held */
250 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
252 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
254 if (clp->cl_cb_ident)
255 idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
258 static void pnfs_init_server(struct nfs_server *server)
260 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
263 static void nfs4_destroy_server(struct nfs_server *server)
265 nfs4_purge_state_owners(server);
269 static void nfs4_shutdown_client(struct nfs_client *clp)
273 void nfs_cleanup_cb_ident_idr(struct net *net)
277 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
281 static void pnfs_init_server(struct nfs_server *server)
285 #endif /* CONFIG_NFS_V4 */
288 * Destroy a shared client record
290 static void nfs_free_client(struct nfs_client *clp)
292 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
294 nfs4_shutdown_client(clp);
296 nfs_fscache_release_client_cookie(clp);
298 /* -EIO all pending I/O */
299 if (!IS_ERR(clp->cl_rpcclient))
300 rpc_shutdown_client(clp->cl_rpcclient);
302 if (clp->cl_machine_cred != NULL)
303 put_rpccred(clp->cl_machine_cred);
306 kfree(clp->cl_hostname);
307 kfree(clp->server_scope);
311 dprintk("<-- nfs_free_client()\n");
315 * Release a reference to a shared client record
317 void nfs_put_client(struct nfs_client *clp)
324 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
325 nn = net_generic(clp->net, nfs_net_id);
327 if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
328 list_del(&clp->cl_share_link);
329 nfs_cb_idr_remove_locked(clp);
330 spin_unlock(&nn->nfs_client_lock);
332 BUG_ON(!list_empty(&clp->cl_superblocks));
334 nfs_free_client(clp);
337 EXPORT_SYMBOL_GPL(nfs_put_client);
339 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
341 * Test if two ip6 socket addresses refer to the same socket by
342 * comparing relevant fields. The padding bytes specifically, are not
343 * compared. sin6_flowinfo is not compared because it only affects QoS
344 * and sin6_scope_id is only compared if the address is "link local"
345 * because "link local" addresses need only be unique to a specific
346 * link. Conversely, ordinary unicast addresses might have different
349 * The caller should ensure both socket addresses are AF_INET6.
351 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
352 const struct sockaddr *sa2)
354 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
355 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
357 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
359 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
360 return sin1->sin6_scope_id == sin2->sin6_scope_id;
364 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
365 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
366 const struct sockaddr *sa2)
373 * Test if two ip4 socket addresses refer to the same socket, by
374 * comparing relevant fields. The padding bytes specifically, are
377 * The caller should ensure both socket addresses are AF_INET.
379 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
380 const struct sockaddr *sa2)
382 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
383 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
385 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
388 static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
389 const struct sockaddr *sa2)
391 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
392 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
394 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
395 (sin1->sin6_port == sin2->sin6_port);
398 static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
399 const struct sockaddr *sa2)
401 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
402 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
404 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
405 (sin1->sin_port == sin2->sin_port);
408 #if defined(CONFIG_NFS_V4_1)
410 * Test if two socket addresses represent the same actual socket,
411 * by comparing (only) relevant fields, excluding the port number.
413 static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
414 const struct sockaddr *sa2)
416 if (sa1->sa_family != sa2->sa_family)
419 switch (sa1->sa_family) {
421 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
423 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
427 #endif /* CONFIG_NFS_V4_1 */
430 * Test if two socket addresses represent the same actual socket,
431 * by comparing (only) relevant fields, including the port number.
433 static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
434 const struct sockaddr *sa2)
436 if (sa1->sa_family != sa2->sa_family)
439 switch (sa1->sa_family) {
441 return nfs_sockaddr_cmp_ip4(sa1, sa2);
443 return nfs_sockaddr_cmp_ip6(sa1, sa2);
448 #if defined(CONFIG_NFS_V4_1)
449 /* Common match routine for v4.0 and v4.1 callback services */
450 static bool nfs4_cb_match_client(const struct sockaddr *addr,
451 struct nfs_client *clp, u32 minorversion)
453 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
455 /* Don't match clients that failed to initialise */
456 if (!(clp->cl_cons_state == NFS_CS_READY ||
457 clp->cl_cons_state == NFS_CS_SESSION_INITING))
460 /* Match the version and minorversion */
461 if (clp->rpc_ops->version != 4 ||
462 clp->cl_minorversion != minorversion)
465 /* Match only the IP address, not the port number */
466 if (!nfs_sockaddr_match_ipaddr(addr, clap))
471 #endif /* CONFIG_NFS_V4_1 */
474 * Find an nfs_client on the list that matches the initialisation data
477 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
479 struct nfs_client *clp;
480 const struct sockaddr *sap = data->addr;
481 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
483 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
484 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
485 /* Don't match clients that failed to initialise properly */
486 if (clp->cl_cons_state < 0)
489 /* Different NFS versions cannot share the same nfs_client */
490 if (clp->rpc_ops != data->rpc_ops)
493 if (clp->cl_proto != data->proto)
495 /* Match nfsv4 minorversion */
496 if (clp->cl_minorversion != data->minorversion)
498 /* Match the full socket address */
499 if (!nfs_sockaddr_cmp(sap, clap))
502 atomic_inc(&clp->cl_count);
509 * Look up a client by IP address and protocol version
510 * - creates a new record if one doesn't yet exist
512 static struct nfs_client *
513 nfs_get_client(const struct nfs_client_initdata *cl_init,
514 const struct rpc_timeout *timeparms,
516 rpc_authflavor_t authflavour,
519 struct nfs_client *clp, *new = NULL;
521 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
523 dprintk("--> nfs_get_client(%s,v%u)\n",
524 cl_init->hostname ?: "", cl_init->rpc_ops->version);
526 /* see if the client already exists */
528 spin_lock(&nn->nfs_client_lock);
530 clp = nfs_match_client(cl_init);
536 spin_unlock(&nn->nfs_client_lock);
538 new = nfs_alloc_client(cl_init);
539 } while (!IS_ERR(new));
541 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
544 /* install a new client and return with it unready */
547 list_add(&clp->cl_share_link, &nn->nfs_client_list);
548 spin_unlock(&nn->nfs_client_lock);
550 error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
551 authflavour, noresvport);
554 return ERR_PTR(error);
556 dprintk("--> nfs_get_client() = %p [new]\n", clp);
559 /* found an existing client
560 * - make sure it's ready before returning
563 spin_unlock(&nn->nfs_client_lock);
566 nfs_free_client(new);
568 error = wait_event_killable(nfs_client_active_wq,
569 clp->cl_cons_state < NFS_CS_INITING);
572 return ERR_PTR(-ERESTARTSYS);
575 if (clp->cl_cons_state < NFS_CS_READY) {
576 error = clp->cl_cons_state;
578 return ERR_PTR(error);
581 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
583 dprintk("--> nfs_get_client() = %p [share]\n", clp);
588 * Mark a server as ready or failed
590 void nfs_mark_client_ready(struct nfs_client *clp, int state)
592 clp->cl_cons_state = state;
593 wake_up_all(&nfs_client_active_wq);
597 * With sessions, the client is not marked ready until after a
598 * successful EXCHANGE_ID and CREATE_SESSION.
600 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
601 * other versions of NFS can be tried.
603 int nfs4_check_client_ready(struct nfs_client *clp)
605 if (!nfs4_has_session(clp))
607 if (clp->cl_cons_state < NFS_CS_READY)
608 return -EPROTONOSUPPORT;
613 * Initialise the timeout values for a connection
615 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
616 unsigned int timeo, unsigned int retrans)
618 to->to_initval = timeo * HZ / 10;
619 to->to_retries = retrans;
622 case XPRT_TRANSPORT_TCP:
623 case XPRT_TRANSPORT_RDMA:
624 if (to->to_retries == 0)
625 to->to_retries = NFS_DEF_TCP_RETRANS;
626 if (to->to_initval == 0)
627 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
628 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
629 to->to_initval = NFS_MAX_TCP_TIMEOUT;
630 to->to_increment = to->to_initval;
631 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
632 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
633 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
634 if (to->to_maxval < to->to_initval)
635 to->to_maxval = to->to_initval;
636 to->to_exponential = 0;
638 case XPRT_TRANSPORT_UDP:
639 if (to->to_retries == 0)
640 to->to_retries = NFS_DEF_UDP_RETRANS;
642 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
643 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
644 to->to_initval = NFS_MAX_UDP_TIMEOUT;
645 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
646 to->to_exponential = 1;
654 * Create an RPC client handle
656 static int nfs_create_rpc_client(struct nfs_client *clp,
657 const struct rpc_timeout *timeparms,
658 rpc_authflavor_t flavor,
659 int discrtry, int noresvport)
661 struct rpc_clnt *clnt = NULL;
662 struct rpc_create_args args = {
664 .protocol = clp->cl_proto,
665 .address = (struct sockaddr *)&clp->cl_addr,
666 .addrsize = clp->cl_addrlen,
667 .timeout = timeparms,
668 .servername = clp->cl_hostname,
669 .program = &nfs_program,
670 .version = clp->rpc_ops->version,
671 .authflavor = flavor,
675 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
677 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
679 if (!IS_ERR(clp->cl_rpcclient))
682 clnt = rpc_create(&args);
684 dprintk("%s: cannot create RPC client. Error = %ld\n",
685 __func__, PTR_ERR(clnt));
686 return PTR_ERR(clnt);
689 clp->cl_rpcclient = clnt;
694 * Version 2 or 3 client destruction
696 static void nfs_destroy_server(struct nfs_server *server)
698 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
699 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
700 nlmclnt_done(server->nlm_host);
704 * Version 2 or 3 lockd setup
706 static int nfs_start_lockd(struct nfs_server *server)
708 struct nlm_host *host;
709 struct nfs_client *clp = server->nfs_client;
710 struct nlmclnt_initdata nlm_init = {
711 .hostname = clp->cl_hostname,
712 .address = (struct sockaddr *)&clp->cl_addr,
713 .addrlen = clp->cl_addrlen,
714 .nfs_version = clp->rpc_ops->version,
715 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
720 if (nlm_init.nfs_version > 3)
722 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
723 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
726 switch (clp->cl_proto) {
728 nlm_init.protocol = IPPROTO_TCP;
730 case XPRT_TRANSPORT_UDP:
731 nlm_init.protocol = IPPROTO_UDP;
734 host = nlmclnt_init(&nlm_init);
736 return PTR_ERR(host);
738 server->nlm_host = host;
739 server->destroy = nfs_destroy_server;
744 * Initialise an NFSv3 ACL client connection
746 #ifdef CONFIG_NFS_V3_ACL
747 static void nfs_init_server_aclclient(struct nfs_server *server)
749 if (server->nfs_client->rpc_ops->version != 3)
751 if (server->flags & NFS_MOUNT_NOACL)
754 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
755 if (IS_ERR(server->client_acl))
758 /* No errors! Assume that Sun nfsacls are supported */
759 server->caps |= NFS_CAP_ACLS;
763 server->caps &= ~NFS_CAP_ACLS;
766 static inline void nfs_init_server_aclclient(struct nfs_server *server)
768 server->flags &= ~NFS_MOUNT_NOACL;
769 server->caps &= ~NFS_CAP_ACLS;
774 * Create a general RPC client
776 static int nfs_init_server_rpcclient(struct nfs_server *server,
777 const struct rpc_timeout *timeo,
778 rpc_authflavor_t pseudoflavour)
780 struct nfs_client *clp = server->nfs_client;
782 server->client = rpc_clone_client(clp->cl_rpcclient);
783 if (IS_ERR(server->client)) {
784 dprintk("%s: couldn't create rpc_client!\n", __func__);
785 return PTR_ERR(server->client);
788 memcpy(&server->client->cl_timeout_default,
790 sizeof(server->client->cl_timeout_default));
791 server->client->cl_timeout = &server->client->cl_timeout_default;
793 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
794 struct rpc_auth *auth;
796 auth = rpcauth_create(pseudoflavour, server->client);
798 dprintk("%s: couldn't create credcache!\n", __func__);
799 return PTR_ERR(auth);
802 server->client->cl_softrtry = 0;
803 if (server->flags & NFS_MOUNT_SOFT)
804 server->client->cl_softrtry = 1;
810 * Initialise an NFS2 or NFS3 client
812 int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
813 const char *ip_addr, rpc_authflavor_t authflavour,
818 if (clp->cl_cons_state == NFS_CS_READY) {
819 /* the client is already initialised */
820 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
825 * Create a client RPC handle for doing FSSTAT with UNIX auth only
826 * - RFC 2623, sec 2.3.2
828 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
832 nfs_mark_client_ready(clp, NFS_CS_READY);
836 nfs_mark_client_ready(clp, error);
837 dprintk("<-- nfs_init_client() = xerror %d\n", error);
842 * Create a version 2 or 3 client
844 static int nfs_init_server(struct nfs_server *server,
845 const struct nfs_parsed_mount_data *data)
847 struct nfs_client_initdata cl_init = {
848 .hostname = data->nfs_server.hostname,
849 .addr = (const struct sockaddr *)&data->nfs_server.address,
850 .addrlen = data->nfs_server.addrlen,
851 .rpc_ops = &nfs_v2_clientops,
852 .proto = data->nfs_server.protocol,
855 struct rpc_timeout timeparms;
856 struct nfs_client *clp;
859 dprintk("--> nfs_init_server()\n");
862 if (data->version == 3)
863 cl_init.rpc_ops = &nfs_v3_clientops;
866 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
867 data->timeo, data->retrans);
869 /* Allocate or find a client reference we can use */
870 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX,
871 data->flags & NFS_MOUNT_NORESVPORT);
873 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
877 server->nfs_client = clp;
879 /* Initialise the client representation from the mount data */
880 server->flags = data->flags;
881 server->options = data->options;
882 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
883 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
884 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
887 server->rsize = nfs_block_size(data->rsize, NULL);
889 server->wsize = nfs_block_size(data->wsize, NULL);
891 server->acregmin = data->acregmin * HZ;
892 server->acregmax = data->acregmax * HZ;
893 server->acdirmin = data->acdirmin * HZ;
894 server->acdirmax = data->acdirmax * HZ;
896 /* Start lockd here, before we might error out */
897 error = nfs_start_lockd(server);
901 server->port = data->nfs_server.port;
903 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
907 /* Preserve the values of mount_server-related mount options */
908 if (data->mount_server.addrlen) {
909 memcpy(&server->mountd_address, &data->mount_server.address,
910 data->mount_server.addrlen);
911 server->mountd_addrlen = data->mount_server.addrlen;
913 server->mountd_version = data->mount_server.version;
914 server->mountd_port = data->mount_server.port;
915 server->mountd_protocol = data->mount_server.protocol;
917 server->namelen = data->namlen;
918 /* Create a client RPC handle for the NFSv3 ACL management interface */
919 nfs_init_server_aclclient(server);
920 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
924 server->nfs_client = NULL;
926 dprintk("<-- nfs_init_server() = xerror %d\n", error);
931 * Load up the server record from information gained in an fsinfo record
933 static void nfs_server_set_fsinfo(struct nfs_server *server,
934 struct nfs_fh *mntfh,
935 struct nfs_fsinfo *fsinfo)
937 unsigned long max_rpc_payload;
939 /* Work out a lot of parameters */
940 if (server->rsize == 0)
941 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
942 if (server->wsize == 0)
943 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
945 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
946 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
947 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
948 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
950 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
951 if (server->rsize > max_rpc_payload)
952 server->rsize = max_rpc_payload;
953 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
954 server->rsize = NFS_MAX_FILE_IO_SIZE;
955 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
957 server->backing_dev_info.name = "nfs";
958 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
960 if (server->wsize > max_rpc_payload)
961 server->wsize = max_rpc_payload;
962 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
963 server->wsize = NFS_MAX_FILE_IO_SIZE;
964 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
965 server->pnfs_blksize = fsinfo->blksize;
966 set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
968 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
970 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
971 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
972 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
973 if (server->dtsize > server->rsize)
974 server->dtsize = server->rsize;
976 if (server->flags & NFS_MOUNT_NOAC) {
977 server->acregmin = server->acregmax = 0;
978 server->acdirmin = server->acdirmax = 0;
981 server->maxfilesize = fsinfo->maxfilesize;
983 server->time_delta = fsinfo->time_delta;
985 /* We're airborne Set socket buffersize */
986 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
990 * Probe filesystem information, including the FSID on v2/v3
992 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
994 struct nfs_fsinfo fsinfo;
995 struct nfs_client *clp = server->nfs_client;
998 dprintk("--> nfs_probe_fsinfo()\n");
1000 if (clp->rpc_ops->set_capabilities != NULL) {
1001 error = clp->rpc_ops->set_capabilities(server, mntfh);
1006 fsinfo.fattr = fattr;
1007 fsinfo.layouttype = 0;
1008 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
1012 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
1014 /* Get some general file system info */
1015 if (server->namelen == 0) {
1016 struct nfs_pathconf pathinfo;
1018 pathinfo.fattr = fattr;
1019 nfs_fattr_init(fattr);
1021 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
1022 server->namelen = pathinfo.max_namelen;
1025 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1029 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1034 * Copy useful information when duplicating a server record
1036 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1038 target->flags = source->flags;
1039 target->rsize = source->rsize;
1040 target->wsize = source->wsize;
1041 target->acregmin = source->acregmin;
1042 target->acregmax = source->acregmax;
1043 target->acdirmin = source->acdirmin;
1044 target->acdirmax = source->acdirmax;
1045 target->caps = source->caps;
1046 target->options = source->options;
1049 static void nfs_server_insert_lists(struct nfs_server *server)
1051 struct nfs_client *clp = server->nfs_client;
1052 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
1054 spin_lock(&nn->nfs_client_lock);
1055 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
1056 list_add_tail(&server->master_link, &nn->nfs_volume_list);
1057 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1058 spin_unlock(&nn->nfs_client_lock);
1062 static void nfs_server_remove_lists(struct nfs_server *server)
1064 struct nfs_client *clp = server->nfs_client;
1069 nn = net_generic(clp->net, nfs_net_id);
1070 spin_lock(&nn->nfs_client_lock);
1071 list_del_rcu(&server->client_link);
1072 if (list_empty(&clp->cl_superblocks))
1073 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1074 list_del(&server->master_link);
1075 spin_unlock(&nn->nfs_client_lock);
1081 * Allocate and initialise a server record
1083 static struct nfs_server *nfs_alloc_server(void)
1085 struct nfs_server *server;
1087 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1091 server->client = server->client_acl = ERR_PTR(-EINVAL);
1093 /* Zero out the NFS state stuff */
1094 INIT_LIST_HEAD(&server->client_link);
1095 INIT_LIST_HEAD(&server->master_link);
1096 INIT_LIST_HEAD(&server->delegations);
1097 INIT_LIST_HEAD(&server->layouts);
1098 INIT_LIST_HEAD(&server->state_owners_lru);
1100 atomic_set(&server->active, 0);
1102 server->io_stats = nfs_alloc_iostats();
1103 if (!server->io_stats) {
1108 if (bdi_init(&server->backing_dev_info)) {
1109 nfs_free_iostats(server->io_stats);
1114 ida_init(&server->openowner_id);
1115 ida_init(&server->lockowner_id);
1116 pnfs_init_server(server);
1122 * Free up a server record
1124 void nfs_free_server(struct nfs_server *server)
1126 dprintk("--> nfs_free_server()\n");
1128 nfs_server_remove_lists(server);
1129 unset_pnfs_layoutdriver(server);
1131 if (server->destroy != NULL)
1132 server->destroy(server);
1134 if (!IS_ERR(server->client_acl))
1135 rpc_shutdown_client(server->client_acl);
1136 if (!IS_ERR(server->client))
1137 rpc_shutdown_client(server->client);
1139 nfs_put_client(server->nfs_client);
1141 ida_destroy(&server->lockowner_id);
1142 ida_destroy(&server->openowner_id);
1143 nfs_free_iostats(server->io_stats);
1144 bdi_destroy(&server->backing_dev_info);
1146 nfs_release_automount_timer();
1147 dprintk("<-- nfs_free_server()\n");
1151 * Create a version 2 or 3 volume record
1152 * - keyed on server and FSID
1154 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1155 struct nfs_fh *mntfh)
1157 struct nfs_server *server;
1158 struct nfs_fattr *fattr;
1161 server = nfs_alloc_server();
1163 return ERR_PTR(-ENOMEM);
1166 fattr = nfs_alloc_fattr();
1170 /* Get a client representation */
1171 error = nfs_init_server(server, data);
1175 BUG_ON(!server->nfs_client);
1176 BUG_ON(!server->nfs_client->rpc_ops);
1177 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1179 /* Probe the root fh to retrieve its FSID */
1180 error = nfs_probe_fsinfo(server, mntfh, fattr);
1183 if (server->nfs_client->rpc_ops->version == 3) {
1184 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1185 server->namelen = NFS3_MAXNAMLEN;
1186 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1187 server->caps |= NFS_CAP_READDIRPLUS;
1189 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1190 server->namelen = NFS2_MAXNAMLEN;
1193 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1194 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
1196 dprintk("nfs_create_server: getattr error = %d\n", -error);
1200 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
1202 dprintk("Server FSID: %llx:%llx\n",
1203 (unsigned long long) server->fsid.major,
1204 (unsigned long long) server->fsid.minor);
1206 nfs_server_insert_lists(server);
1207 server->mount_time = jiffies;
1208 nfs_free_fattr(fattr);
1212 nfs_free_fattr(fattr);
1213 nfs_free_server(server);
1214 return ERR_PTR(error);
1217 #ifdef CONFIG_NFS_V4
1219 * NFSv4.0 callback thread helper
1221 * Find a client by callback identifier
1224 nfs4_find_client_ident(struct net *net, int cb_ident)
1226 struct nfs_client *clp;
1227 struct nfs_net *nn = net_generic(net, nfs_net_id);
1229 spin_lock(&nn->nfs_client_lock);
1230 clp = idr_find(&nn->cb_ident_idr, cb_ident);
1232 atomic_inc(&clp->cl_count);
1233 spin_unlock(&nn->nfs_client_lock);
1237 #if defined(CONFIG_NFS_V4_1)
1239 * NFSv4.1 callback thread helper
1240 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1241 * minorversion, and sessionID
1243 * Returns NULL if no such client
1246 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1247 struct nfs4_sessionid *sid)
1249 struct nfs_client *clp;
1250 struct nfs_net *nn = net_generic(net, nfs_net_id);
1252 spin_lock(&nn->nfs_client_lock);
1253 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
1254 if (nfs4_cb_match_client(addr, clp, 1) == false)
1257 if (!nfs4_has_session(clp))
1260 /* Match sessionid*/
1261 if (memcmp(clp->cl_session->sess_id.data,
1262 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
1265 atomic_inc(&clp->cl_count);
1266 spin_unlock(&nn->nfs_client_lock);
1269 spin_unlock(&nn->nfs_client_lock);
1273 #else /* CONFIG_NFS_V4_1 */
1276 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1277 struct nfs4_sessionid *sid)
1281 #endif /* CONFIG_NFS_V4_1 */
1284 * Initialize the NFS4 callback service
1286 static int nfs4_init_callback(struct nfs_client *clp)
1290 if (clp->rpc_ops->version == 4) {
1291 struct rpc_xprt *xprt;
1293 xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt);
1295 if (nfs4_has_session(clp)) {
1296 error = xprt_setup_backchannel(xprt,
1297 NFS41_BC_MIN_CALLBACKS);
1302 error = nfs_callback_up(clp->cl_mvops->minor_version, xprt);
1304 dprintk("%s: failed to start callback. Error = %d\n",
1308 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1314 * Initialize the minor version specific parts of an NFS4 client record
1316 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1318 #if defined(CONFIG_NFS_V4_1)
1319 if (clp->cl_mvops->minor_version) {
1320 struct nfs4_session *session = NULL;
1322 * Create the session and mark it expired.
1323 * When a SEQUENCE operation encounters the expired session
1324 * it will do session recovery to initialize it.
1326 session = nfs4_alloc_session(clp);
1330 clp->cl_session = session;
1332 * The create session reply races with the server back
1333 * channel probe. Mark the client NFS_CS_SESSION_INITING
1334 * so that the client back channel can find the
1337 clp->cl_cons_state = NFS_CS_SESSION_INITING;
1339 #endif /* CONFIG_NFS_V4_1 */
1341 return nfs4_init_callback(clp);
1345 * Initialise an NFS4 client record
1347 int nfs4_init_client(struct nfs_client *clp,
1348 const struct rpc_timeout *timeparms,
1349 const char *ip_addr,
1350 rpc_authflavor_t authflavour,
1353 char buf[INET6_ADDRSTRLEN + 1];
1356 if (clp->cl_cons_state == NFS_CS_READY) {
1357 /* the client is initialised already */
1358 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1362 /* Check NFS protocol revision and initialize RPC op vector */
1363 clp->rpc_ops = &nfs_v4_clientops;
1365 error = nfs_create_rpc_client(clp, timeparms, authflavour,
1370 /* If no clientaddr= option was specified, find a usable cb address */
1371 if (ip_addr == NULL) {
1372 struct sockaddr_storage cb_addr;
1373 struct sockaddr *sap = (struct sockaddr *)&cb_addr;
1375 error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
1378 error = rpc_ntop(sap, buf, sizeof(buf));
1381 ip_addr = (const char *)buf;
1383 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1385 error = nfs_idmap_new(clp);
1387 dprintk("%s: failed to create idmapper. Error = %d\n",
1391 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1393 error = nfs4_init_client_minor_version(clp);
1397 if (!nfs4_has_session(clp))
1398 nfs_mark_client_ready(clp, NFS_CS_READY);
1402 nfs_mark_client_ready(clp, error);
1403 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1408 * Set up an NFS4 client
1410 static int nfs4_set_client(struct nfs_server *server,
1411 const char *hostname,
1412 const struct sockaddr *addr,
1413 const size_t addrlen,
1414 const char *ip_addr,
1415 rpc_authflavor_t authflavour,
1416 int proto, const struct rpc_timeout *timeparms,
1417 u32 minorversion, struct net *net)
1419 struct nfs_client_initdata cl_init = {
1420 .hostname = hostname,
1423 .rpc_ops = &nfs_v4_clientops,
1425 .minorversion = minorversion,
1428 struct nfs_client *clp;
1431 dprintk("--> nfs4_set_client()\n");
1433 /* Allocate or find a client reference we can use */
1434 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour,
1435 server->flags & NFS_MOUNT_NORESVPORT);
1437 error = PTR_ERR(clp);
1442 * Query for the lease time on clientid setup or renewal
1444 * Note that this will be set on nfs_clients that were created
1445 * only for the DS role and did not set this bit, but now will
1446 * serve a dual role.
1448 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1450 server->nfs_client = clp;
1451 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1454 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1459 * Set up a pNFS Data Server client.
1461 * Return any existing nfs_client that matches server address,port,version
1464 * For a new nfs_client, use a soft mount (default), a low retrans and a
1465 * low timeout interval so that if a connection is lost, we retry through
1468 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1469 const struct sockaddr *ds_addr,
1470 int ds_addrlen, int ds_proto)
1472 struct nfs_client_initdata cl_init = {
1474 .addrlen = ds_addrlen,
1475 .rpc_ops = &nfs_v4_clientops,
1477 .minorversion = mds_clp->cl_minorversion,
1478 .net = mds_clp->net,
1480 struct rpc_timeout ds_timeout = {
1481 .to_initval = 15 * HZ,
1482 .to_maxval = 15 * HZ,
1484 .to_exponential = 1,
1486 struct nfs_client *clp;
1489 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1490 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1491 * (section 13.1 RFC 5661).
1493 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1494 mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
1496 dprintk("<-- %s %p\n", __func__, clp);
1499 EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
1502 * Session has been established, and the client marked ready.
1503 * Set the mount rsize and wsize with negotiated fore channel
1504 * attributes which will be bound checked in nfs_server_set_fsinfo.
1506 static void nfs4_session_set_rwsize(struct nfs_server *server)
1508 #ifdef CONFIG_NFS_V4_1
1509 struct nfs4_session *sess;
1513 if (!nfs4_has_session(server->nfs_client))
1515 sess = server->nfs_client->cl_session;
1516 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1517 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1519 if (server->rsize > server_resp_sz)
1520 server->rsize = server_resp_sz;
1521 if (server->wsize > server_rqst_sz)
1522 server->wsize = server_rqst_sz;
1523 #endif /* CONFIG_NFS_V4_1 */
1526 static int nfs4_server_common_setup(struct nfs_server *server,
1527 struct nfs_fh *mntfh)
1529 struct nfs_fattr *fattr;
1532 BUG_ON(!server->nfs_client);
1533 BUG_ON(!server->nfs_client->rpc_ops);
1534 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1536 /* data servers support only a subset of NFSv4.1 */
1537 if (is_ds_only_client(server->nfs_client))
1538 return -EPROTONOSUPPORT;
1540 fattr = nfs_alloc_fattr();
1544 /* We must ensure the session is initialised first */
1545 error = nfs4_init_session(server);
1549 /* Probe the root fh to retrieve its FSID and filehandle */
1550 error = nfs4_get_rootfh(server, mntfh);
1554 dprintk("Server FSID: %llx:%llx\n",
1555 (unsigned long long) server->fsid.major,
1556 (unsigned long long) server->fsid.minor);
1557 dprintk("Mount FH: %d\n", mntfh->size);
1559 nfs4_session_set_rwsize(server);
1561 error = nfs_probe_fsinfo(server, mntfh, fattr);
1565 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1566 server->namelen = NFS4_MAXNAMLEN;
1568 nfs_server_insert_lists(server);
1569 server->mount_time = jiffies;
1570 server->destroy = nfs4_destroy_server;
1572 nfs_free_fattr(fattr);
1577 * Create a version 4 volume record
1579 static int nfs4_init_server(struct nfs_server *server,
1580 const struct nfs_parsed_mount_data *data)
1582 struct rpc_timeout timeparms;
1585 dprintk("--> nfs4_init_server()\n");
1587 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1588 data->timeo, data->retrans);
1590 /* Initialise the client representation from the mount data */
1591 server->flags = data->flags;
1592 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1593 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1594 server->caps |= NFS_CAP_READDIRPLUS;
1595 server->options = data->options;
1597 /* Get a client record */
1598 error = nfs4_set_client(server,
1599 data->nfs_server.hostname,
1600 (const struct sockaddr *)&data->nfs_server.address,
1601 data->nfs_server.addrlen,
1602 data->client_address,
1603 data->auth_flavors[0],
1604 data->nfs_server.protocol,
1612 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1615 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1616 server->caps |= NFS_CAP_UIDGID_NOMAP;
1619 server->rsize = nfs_block_size(data->rsize, NULL);
1621 server->wsize = nfs_block_size(data->wsize, NULL);
1623 server->acregmin = data->acregmin * HZ;
1624 server->acregmax = data->acregmax * HZ;
1625 server->acdirmin = data->acdirmin * HZ;
1626 server->acdirmax = data->acdirmax * HZ;
1628 server->port = data->nfs_server.port;
1630 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1634 dprintk("<-- nfs4_init_server() = %d\n", error);
1639 * Create a version 4 volume record
1640 * - keyed on server and FSID
1642 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1643 struct nfs_fh *mntfh)
1645 struct nfs_server *server;
1648 dprintk("--> nfs4_create_server()\n");
1650 server = nfs_alloc_server();
1652 return ERR_PTR(-ENOMEM);
1654 /* set up the general RPC client */
1655 error = nfs4_init_server(server, data);
1659 error = nfs4_server_common_setup(server, mntfh);
1663 dprintk("<-- nfs4_create_server() = %p\n", server);
1667 nfs_free_server(server);
1668 dprintk("<-- nfs4_create_server() = error %d\n", error);
1669 return ERR_PTR(error);
1673 * Create an NFS4 referral server record
1675 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1676 struct nfs_fh *mntfh)
1678 struct nfs_client *parent_client;
1679 struct nfs_server *server, *parent_server;
1682 dprintk("--> nfs4_create_referral_server()\n");
1684 server = nfs_alloc_server();
1686 return ERR_PTR(-ENOMEM);
1688 parent_server = NFS_SB(data->sb);
1689 parent_client = parent_server->nfs_client;
1691 /* Initialise the client representation from the parent server */
1692 nfs_server_copy_userdata(server, parent_server);
1693 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
1695 /* Get a client representation.
1696 * Note: NFSv4 always uses TCP, */
1697 error = nfs4_set_client(server, data->hostname,
1700 parent_client->cl_ipaddr,
1702 rpc_protocol(parent_server->client),
1703 parent_server->client->cl_timeout,
1704 parent_client->cl_mvops->minor_version,
1705 parent_client->net);
1709 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1713 error = nfs4_server_common_setup(server, mntfh);
1717 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1721 nfs_free_server(server);
1722 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1723 return ERR_PTR(error);
1726 #endif /* CONFIG_NFS_V4 */
1729 * Clone an NFS2, NFS3 or NFS4 server record
1731 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1733 struct nfs_fattr *fattr)
1735 struct nfs_server *server;
1736 struct nfs_fattr *fattr_fsinfo;
1739 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1740 (unsigned long long) fattr->fsid.major,
1741 (unsigned long long) fattr->fsid.minor);
1743 server = nfs_alloc_server();
1745 return ERR_PTR(-ENOMEM);
1748 fattr_fsinfo = nfs_alloc_fattr();
1749 if (fattr_fsinfo == NULL)
1750 goto out_free_server;
1752 /* Copy data from the source */
1753 server->nfs_client = source->nfs_client;
1754 server->destroy = source->destroy;
1755 atomic_inc(&server->nfs_client->cl_count);
1756 nfs_server_copy_userdata(server, source);
1758 server->fsid = fattr->fsid;
1760 error = nfs_init_server_rpcclient(server,
1761 source->client->cl_timeout,
1762 source->client->cl_auth->au_flavor);
1764 goto out_free_server;
1765 if (!IS_ERR(source->client_acl))
1766 nfs_init_server_aclclient(server);
1768 /* probe the filesystem info for this server filesystem */
1769 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1771 goto out_free_server;
1773 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1774 server->namelen = NFS4_MAXNAMLEN;
1776 dprintk("Cloned FSID: %llx:%llx\n",
1777 (unsigned long long) server->fsid.major,
1778 (unsigned long long) server->fsid.minor);
1780 error = nfs_start_lockd(server);
1782 goto out_free_server;
1784 nfs_server_insert_lists(server);
1785 server->mount_time = jiffies;
1787 nfs_free_fattr(fattr_fsinfo);
1788 dprintk("<-- nfs_clone_server() = %p\n", server);
1792 nfs_free_fattr(fattr_fsinfo);
1793 nfs_free_server(server);
1794 dprintk("<-- nfs_clone_server() = error %d\n", error);
1795 return ERR_PTR(error);
1798 void nfs_clients_init(struct net *net)
1800 struct nfs_net *nn = net_generic(net, nfs_net_id);
1802 INIT_LIST_HEAD(&nn->nfs_client_list);
1803 INIT_LIST_HEAD(&nn->nfs_volume_list);
1804 #ifdef CONFIG_NFS_V4
1805 idr_init(&nn->cb_ident_idr);
1807 spin_lock_init(&nn->nfs_client_lock);
1810 #ifdef CONFIG_PROC_FS
1811 static struct proc_dir_entry *proc_fs_nfs;
1813 static int nfs_server_list_open(struct inode *inode, struct file *file);
1814 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1815 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1816 static void nfs_server_list_stop(struct seq_file *p, void *v);
1817 static int nfs_server_list_show(struct seq_file *m, void *v);
1819 static const struct seq_operations nfs_server_list_ops = {
1820 .start = nfs_server_list_start,
1821 .next = nfs_server_list_next,
1822 .stop = nfs_server_list_stop,
1823 .show = nfs_server_list_show,
1826 static const struct file_operations nfs_server_list_fops = {
1827 .open = nfs_server_list_open,
1829 .llseek = seq_lseek,
1830 .release = seq_release,
1831 .owner = THIS_MODULE,
1834 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1835 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1836 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1837 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1838 static int nfs_volume_list_show(struct seq_file *m, void *v);
1840 static const struct seq_operations nfs_volume_list_ops = {
1841 .start = nfs_volume_list_start,
1842 .next = nfs_volume_list_next,
1843 .stop = nfs_volume_list_stop,
1844 .show = nfs_volume_list_show,
1847 static const struct file_operations nfs_volume_list_fops = {
1848 .open = nfs_volume_list_open,
1850 .llseek = seq_lseek,
1851 .release = seq_release,
1852 .owner = THIS_MODULE,
1856 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1859 static int nfs_server_list_open(struct inode *inode, struct file *file)
1863 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1864 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1866 ret = seq_open(file, &nfs_server_list_ops);
1870 m = file->private_data;
1877 * set up the iterator to start reading from the server list and return the first item
1879 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1881 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1883 /* lock the list against modification */
1884 spin_lock(&nn->nfs_client_lock);
1885 return seq_list_start_head(&nn->nfs_client_list, *_pos);
1889 * move to next server
1891 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1893 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1895 return seq_list_next(v, &nn->nfs_client_list, pos);
1899 * clean up after reading from the transports list
1901 static void nfs_server_list_stop(struct seq_file *p, void *v)
1903 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1905 spin_unlock(&nn->nfs_client_lock);
1909 * display a header line followed by a load of call lines
1911 static int nfs_server_list_show(struct seq_file *m, void *v)
1913 struct nfs_client *clp;
1914 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1916 /* display header on line 1 */
1917 if (v == &nn->nfs_client_list) {
1918 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1922 /* display one transport per line on subsequent lines */
1923 clp = list_entry(v, struct nfs_client, cl_share_link);
1925 /* Check if the client is initialized */
1926 if (clp->cl_cons_state != NFS_CS_READY)
1930 seq_printf(m, "v%u %s %s %3d %s\n",
1931 clp->rpc_ops->version,
1932 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1933 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1934 atomic_read(&clp->cl_count),
1942 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1944 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1948 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1949 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1951 ret = seq_open(file, &nfs_volume_list_ops);
1955 m = file->private_data;
1962 * set up the iterator to start reading from the volume list and return the first item
1964 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1966 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1968 /* lock the list against modification */
1969 spin_lock(&nn->nfs_client_lock);
1970 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
1974 * move to next volume
1976 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1978 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1980 return seq_list_next(v, &nn->nfs_volume_list, pos);
1984 * clean up after reading from the transports list
1986 static void nfs_volume_list_stop(struct seq_file *p, void *v)
1988 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1990 spin_unlock(&nn->nfs_client_lock);
1994 * display a header line followed by a load of call lines
1996 static int nfs_volume_list_show(struct seq_file *m, void *v)
1998 struct nfs_server *server;
1999 struct nfs_client *clp;
2000 char dev[8], fsid[17];
2001 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
2003 /* display header on line 1 */
2004 if (v == &nn->nfs_volume_list) {
2005 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
2008 /* display one transport per line on subsequent lines */
2009 server = list_entry(v, struct nfs_server, master_link);
2010 clp = server->nfs_client;
2012 snprintf(dev, 8, "%u:%u",
2013 MAJOR(server->s_dev), MINOR(server->s_dev));
2015 snprintf(fsid, 17, "%llx:%llx",
2016 (unsigned long long) server->fsid.major,
2017 (unsigned long long) server->fsid.minor);
2020 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
2021 clp->rpc_ops->version,
2022 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
2023 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
2026 nfs_server_fscache_state(server));
2033 * initialise the /proc/fs/nfsfs/ directory
2035 int __init nfs_fs_proc_init(void)
2037 struct proc_dir_entry *p;
2039 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
2043 /* a file of servers with which we're dealing */
2044 p = proc_create("servers", S_IFREG|S_IRUGO,
2045 proc_fs_nfs, &nfs_server_list_fops);
2049 /* a file of volumes that we have mounted */
2050 p = proc_create("volumes", S_IFREG|S_IRUGO,
2051 proc_fs_nfs, &nfs_volume_list_fops);
2057 remove_proc_entry("servers", proc_fs_nfs);
2059 remove_proc_entry("fs/nfsfs", NULL);
2065 * clean up the /proc/fs/nfsfs/ directory
2067 void nfs_fs_proc_exit(void)
2069 remove_proc_entry("volumes", proc_fs_nfs);
2070 remove_proc_entry("servers", proc_fs_nfs);
2071 remove_proc_entry("fs/nfsfs", NULL);
2074 #endif /* CONFIG_PROC_FS */
2076 module_param(nfs4_disable_idmapping, bool, 0644);
2077 MODULE_PARM_DESC(nfs4_disable_idmapping,
2078 "Turn off NFSv4 idmapping when using 'sec=sys'");