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>
40 #include <linux/nfs_xdr.h>
41 #include <linux/sunrpc/bc_xprt.h>
42 #include <linux/nsproxy.h>
43 #include <linux/pid_namespace.h>
45 #include <asm/system.h>
49 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_CLIENT
58 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
62 * Get a unique NFSv4.0 callback identifier which will be used
63 * by the V4.0 callback service to lookup the nfs_client struct
65 static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
68 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
70 if (clp->rpc_ops->version != 4 || minorversion != 0)
73 if (!idr_pre_get(&nn->cb_ident_idr, GFP_KERNEL))
75 spin_lock(&nn->nfs_client_lock);
76 ret = idr_get_new(&nn->cb_ident_idr, clp, &clp->cl_cb_ident);
77 spin_unlock(&nn->nfs_client_lock);
82 #endif /* CONFIG_NFS_V4 */
85 * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
87 static bool nfs4_disable_idmapping = true;
92 static const struct rpc_version *nfs_version[5] = {
102 const struct rpc_program nfs_program = {
104 .number = NFS_PROGRAM,
105 .nrvers = ARRAY_SIZE(nfs_version),
106 .version = nfs_version,
107 .stats = &nfs_rpcstat,
108 .pipe_dir_name = NFS_PIPE_DIRNAME,
111 struct rpc_stat nfs_rpcstat = {
112 .program = &nfs_program
116 #ifdef CONFIG_NFS_V3_ACL
117 static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
118 static const struct rpc_version *nfsacl_version[] = {
119 [3] = &nfsacl_version3,
122 const struct rpc_program nfsacl_program = {
124 .number = NFS_ACL_PROGRAM,
125 .nrvers = ARRAY_SIZE(nfsacl_version),
126 .version = nfsacl_version,
127 .stats = &nfsacl_rpcstat,
129 #endif /* CONFIG_NFS_V3_ACL */
131 struct nfs_client_initdata {
132 const char *hostname;
133 const struct sockaddr *addr;
135 const struct nfs_rpc_ops *rpc_ops;
142 * Allocate a shared client record
144 * Since these are allocated/deallocated very rarely, we don't
145 * bother putting them in a slab cache...
147 static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
149 struct nfs_client *clp;
150 struct rpc_cred *cred;
153 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
156 clp->rpc_ops = cl_init->rpc_ops;
158 atomic_set(&clp->cl_count, 1);
159 clp->cl_cons_state = NFS_CS_INITING;
161 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
162 clp->cl_addrlen = cl_init->addrlen;
164 if (cl_init->hostname) {
166 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
167 if (!clp->cl_hostname)
171 INIT_LIST_HEAD(&clp->cl_superblocks);
172 clp->cl_rpcclient = ERR_PTR(-EINVAL);
174 clp->cl_proto = cl_init->proto;
175 clp->net = get_net(cl_init->net);
178 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
182 spin_lock_init(&clp->cl_lock);
183 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
184 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
185 clp->cl_boot_time = CURRENT_TIME;
186 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
187 clp->cl_minorversion = cl_init->minorversion;
188 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
190 cred = rpc_lookup_machine_cred("*");
192 clp->cl_machine_cred = cred;
193 nfs_fscache_get_client_cookie(clp);
204 #ifdef CONFIG_NFS_V4_1
205 static void nfs4_shutdown_session(struct nfs_client *clp)
207 if (nfs4_has_session(clp)) {
208 nfs4_deviceid_purge_client(clp);
209 nfs4_destroy_session(clp->cl_session);
213 #else /* CONFIG_NFS_V4_1 */
214 static void nfs4_shutdown_session(struct nfs_client *clp)
217 #endif /* CONFIG_NFS_V4_1 */
220 * Destroy the NFS4 callback service
222 static void nfs4_destroy_callback(struct nfs_client *clp)
224 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
225 nfs_callback_down(clp->cl_mvops->minor_version);
228 static void nfs4_shutdown_client(struct nfs_client *clp)
230 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
231 nfs4_kill_renewd(clp);
232 nfs4_shutdown_session(clp);
233 nfs4_destroy_callback(clp);
234 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
235 nfs_idmap_delete(clp);
237 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
240 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
241 void nfs_cleanup_cb_ident_idr(struct net *net)
243 struct nfs_net *nn = net_generic(net, nfs_net_id);
245 idr_destroy(&nn->cb_ident_idr);
248 /* nfs_client_lock held */
249 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
251 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
253 if (clp->cl_cb_ident)
254 idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
257 static void pnfs_init_server(struct nfs_server *server)
259 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
262 static void nfs4_destroy_server(struct nfs_server *server)
264 nfs4_purge_state_owners(server);
268 static void nfs4_shutdown_client(struct nfs_client *clp)
272 void nfs_cleanup_cb_ident_idr(struct net *net)
276 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
280 static void pnfs_init_server(struct nfs_server *server)
284 #endif /* CONFIG_NFS_V4 */
287 * Destroy a shared client record
289 static void nfs_free_client(struct nfs_client *clp)
291 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
293 nfs4_shutdown_client(clp);
295 nfs_fscache_release_client_cookie(clp);
297 /* -EIO all pending I/O */
298 if (!IS_ERR(clp->cl_rpcclient))
299 rpc_shutdown_client(clp->cl_rpcclient);
301 if (clp->cl_machine_cred != NULL)
302 put_rpccred(clp->cl_machine_cred);
305 kfree(clp->cl_hostname);
306 kfree(clp->server_scope);
309 dprintk("<-- nfs_free_client()\n");
313 * Release a reference to a shared client record
315 void nfs_put_client(struct nfs_client *clp)
322 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
323 nn = net_generic(clp->net, nfs_net_id);
325 if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
326 list_del(&clp->cl_share_link);
327 nfs_cb_idr_remove_locked(clp);
328 spin_unlock(&nn->nfs_client_lock);
330 BUG_ON(!list_empty(&clp->cl_superblocks));
332 nfs_free_client(clp);
335 EXPORT_SYMBOL_GPL(nfs_put_client);
337 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
339 * Test if two ip6 socket addresses refer to the same socket by
340 * comparing relevant fields. The padding bytes specifically, are not
341 * compared. sin6_flowinfo is not compared because it only affects QoS
342 * and sin6_scope_id is only compared if the address is "link local"
343 * because "link local" addresses need only be unique to a specific
344 * link. Conversely, ordinary unicast addresses might have different
347 * The caller should ensure both socket addresses are AF_INET6.
349 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
350 const struct sockaddr *sa2)
352 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
353 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
355 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
357 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
358 return sin1->sin6_scope_id == sin2->sin6_scope_id;
362 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
363 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
364 const struct sockaddr *sa2)
371 * Test if two ip4 socket addresses refer to the same socket, by
372 * comparing relevant fields. The padding bytes specifically, are
375 * The caller should ensure both socket addresses are AF_INET.
377 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
378 const struct sockaddr *sa2)
380 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
381 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
383 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
386 static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
387 const struct sockaddr *sa2)
389 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
390 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
392 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
393 (sin1->sin6_port == sin2->sin6_port);
396 static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
397 const struct sockaddr *sa2)
399 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
400 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
402 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
403 (sin1->sin_port == sin2->sin_port);
407 * Test if two socket addresses represent the same actual socket,
408 * by comparing (only) relevant fields, excluding the port number.
410 static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
411 const struct sockaddr *sa2)
413 if (sa1->sa_family != sa2->sa_family)
416 switch (sa1->sa_family) {
418 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
420 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
426 * Test if two socket addresses represent the same actual socket,
427 * by comparing (only) relevant fields, including the port number.
429 static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
430 const struct sockaddr *sa2)
432 if (sa1->sa_family != sa2->sa_family)
435 switch (sa1->sa_family) {
437 return nfs_sockaddr_cmp_ip4(sa1, sa2);
439 return nfs_sockaddr_cmp_ip6(sa1, sa2);
444 /* Common match routine for v4.0 and v4.1 callback services */
446 nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp,
449 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
451 /* Don't match clients that failed to initialise */
452 if (!(clp->cl_cons_state == NFS_CS_READY ||
453 clp->cl_cons_state == NFS_CS_SESSION_INITING))
456 /* Match the version and minorversion */
457 if (clp->rpc_ops->version != 4 ||
458 clp->cl_minorversion != minorversion)
461 /* Match only the IP address, not the port number */
462 if (!nfs_sockaddr_match_ipaddr(addr, clap))
469 * Find an nfs_client on the list that matches the initialisation data
472 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
474 struct nfs_client *clp;
475 const struct sockaddr *sap = data->addr;
476 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
478 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
479 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
480 /* Don't match clients that failed to initialise properly */
481 if (clp->cl_cons_state < 0)
484 /* Different NFS versions cannot share the same nfs_client */
485 if (clp->rpc_ops != data->rpc_ops)
488 if (clp->cl_proto != data->proto)
490 /* Match nfsv4 minorversion */
491 if (clp->cl_minorversion != data->minorversion)
493 /* Match the full socket address */
494 if (!nfs_sockaddr_cmp(sap, clap))
497 atomic_inc(&clp->cl_count);
504 * Look up a client by IP address and protocol version
505 * - creates a new record if one doesn't yet exist
507 static struct nfs_client *
508 nfs_get_client(const struct nfs_client_initdata *cl_init,
509 const struct rpc_timeout *timeparms,
511 rpc_authflavor_t authflavour,
514 struct nfs_client *clp, *new = NULL;
516 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
518 dprintk("--> nfs_get_client(%s,v%u)\n",
519 cl_init->hostname ?: "", cl_init->rpc_ops->version);
521 /* see if the client already exists */
523 spin_lock(&nn->nfs_client_lock);
525 clp = nfs_match_client(cl_init);
531 spin_unlock(&nn->nfs_client_lock);
533 new = nfs_alloc_client(cl_init);
534 } while (!IS_ERR(new));
536 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
539 /* install a new client and return with it unready */
542 list_add(&clp->cl_share_link, &nn->nfs_client_list);
543 spin_unlock(&nn->nfs_client_lock);
545 error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
546 authflavour, noresvport);
549 return ERR_PTR(error);
551 dprintk("--> nfs_get_client() = %p [new]\n", clp);
554 /* found an existing client
555 * - make sure it's ready before returning
558 spin_unlock(&nn->nfs_client_lock);
561 nfs_free_client(new);
563 error = wait_event_killable(nfs_client_active_wq,
564 clp->cl_cons_state < NFS_CS_INITING);
567 return ERR_PTR(-ERESTARTSYS);
570 if (clp->cl_cons_state < NFS_CS_READY) {
571 error = clp->cl_cons_state;
573 return ERR_PTR(error);
576 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
578 dprintk("--> nfs_get_client() = %p [share]\n", clp);
583 * Mark a server as ready or failed
585 void nfs_mark_client_ready(struct nfs_client *clp, int state)
587 clp->cl_cons_state = state;
588 wake_up_all(&nfs_client_active_wq);
592 * With sessions, the client is not marked ready until after a
593 * successful EXCHANGE_ID and CREATE_SESSION.
595 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
596 * other versions of NFS can be tried.
598 int nfs4_check_client_ready(struct nfs_client *clp)
600 if (!nfs4_has_session(clp))
602 if (clp->cl_cons_state < NFS_CS_READY)
603 return -EPROTONOSUPPORT;
608 * Initialise the timeout values for a connection
610 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
611 unsigned int timeo, unsigned int retrans)
613 to->to_initval = timeo * HZ / 10;
614 to->to_retries = retrans;
617 case XPRT_TRANSPORT_TCP:
618 case XPRT_TRANSPORT_RDMA:
619 if (to->to_retries == 0)
620 to->to_retries = NFS_DEF_TCP_RETRANS;
621 if (to->to_initval == 0)
622 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
623 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
624 to->to_initval = NFS_MAX_TCP_TIMEOUT;
625 to->to_increment = to->to_initval;
626 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
627 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
628 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
629 if (to->to_maxval < to->to_initval)
630 to->to_maxval = to->to_initval;
631 to->to_exponential = 0;
633 case XPRT_TRANSPORT_UDP:
634 if (to->to_retries == 0)
635 to->to_retries = NFS_DEF_UDP_RETRANS;
637 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
638 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
639 to->to_initval = NFS_MAX_UDP_TIMEOUT;
640 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
641 to->to_exponential = 1;
649 * Create an RPC client handle
651 static int nfs_create_rpc_client(struct nfs_client *clp,
652 const struct rpc_timeout *timeparms,
653 rpc_authflavor_t flavor,
654 int discrtry, int noresvport)
656 struct rpc_clnt *clnt = NULL;
657 struct rpc_create_args args = {
659 .protocol = clp->cl_proto,
660 .address = (struct sockaddr *)&clp->cl_addr,
661 .addrsize = clp->cl_addrlen,
662 .timeout = timeparms,
663 .servername = clp->cl_hostname,
664 .program = &nfs_program,
665 .version = clp->rpc_ops->version,
666 .authflavor = flavor,
670 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
672 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
674 if (!IS_ERR(clp->cl_rpcclient))
677 clnt = rpc_create(&args);
679 dprintk("%s: cannot create RPC client. Error = %ld\n",
680 __func__, PTR_ERR(clnt));
681 return PTR_ERR(clnt);
684 clp->cl_rpcclient = clnt;
689 * Version 2 or 3 client destruction
691 static void nfs_destroy_server(struct nfs_server *server)
693 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
694 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
695 nlmclnt_done(server->nlm_host);
699 * Version 2 or 3 lockd setup
701 static int nfs_start_lockd(struct nfs_server *server)
703 struct nlm_host *host;
704 struct nfs_client *clp = server->nfs_client;
705 struct nlmclnt_initdata nlm_init = {
706 .hostname = clp->cl_hostname,
707 .address = (struct sockaddr *)&clp->cl_addr,
708 .addrlen = clp->cl_addrlen,
709 .nfs_version = clp->rpc_ops->version,
710 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
715 if (nlm_init.nfs_version > 3)
717 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
718 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
721 switch (clp->cl_proto) {
723 nlm_init.protocol = IPPROTO_TCP;
725 case XPRT_TRANSPORT_UDP:
726 nlm_init.protocol = IPPROTO_UDP;
729 host = nlmclnt_init(&nlm_init);
731 return PTR_ERR(host);
733 server->nlm_host = host;
734 server->destroy = nfs_destroy_server;
739 * Initialise an NFSv3 ACL client connection
741 #ifdef CONFIG_NFS_V3_ACL
742 static void nfs_init_server_aclclient(struct nfs_server *server)
744 if (server->nfs_client->rpc_ops->version != 3)
746 if (server->flags & NFS_MOUNT_NOACL)
749 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
750 if (IS_ERR(server->client_acl))
753 /* No errors! Assume that Sun nfsacls are supported */
754 server->caps |= NFS_CAP_ACLS;
758 server->caps &= ~NFS_CAP_ACLS;
761 static inline void nfs_init_server_aclclient(struct nfs_server *server)
763 server->flags &= ~NFS_MOUNT_NOACL;
764 server->caps &= ~NFS_CAP_ACLS;
769 * Create a general RPC client
771 static int nfs_init_server_rpcclient(struct nfs_server *server,
772 const struct rpc_timeout *timeo,
773 rpc_authflavor_t pseudoflavour)
775 struct nfs_client *clp = server->nfs_client;
777 server->client = rpc_clone_client(clp->cl_rpcclient);
778 if (IS_ERR(server->client)) {
779 dprintk("%s: couldn't create rpc_client!\n", __func__);
780 return PTR_ERR(server->client);
783 memcpy(&server->client->cl_timeout_default,
785 sizeof(server->client->cl_timeout_default));
786 server->client->cl_timeout = &server->client->cl_timeout_default;
788 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
789 struct rpc_auth *auth;
791 auth = rpcauth_create(pseudoflavour, server->client);
793 dprintk("%s: couldn't create credcache!\n", __func__);
794 return PTR_ERR(auth);
797 server->client->cl_softrtry = 0;
798 if (server->flags & NFS_MOUNT_SOFT)
799 server->client->cl_softrtry = 1;
805 * Initialise an NFS2 or NFS3 client
807 int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
808 const char *ip_addr, rpc_authflavor_t authflavour,
813 if (clp->cl_cons_state == NFS_CS_READY) {
814 /* the client is already initialised */
815 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
820 * Create a client RPC handle for doing FSSTAT with UNIX auth only
821 * - RFC 2623, sec 2.3.2
823 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
827 nfs_mark_client_ready(clp, NFS_CS_READY);
831 nfs_mark_client_ready(clp, error);
832 dprintk("<-- nfs_init_client() = xerror %d\n", error);
837 * Create a version 2 or 3 client
839 static int nfs_init_server(struct nfs_server *server,
840 const struct nfs_parsed_mount_data *data)
842 struct nfs_client_initdata cl_init = {
843 .hostname = data->nfs_server.hostname,
844 .addr = (const struct sockaddr *)&data->nfs_server.address,
845 .addrlen = data->nfs_server.addrlen,
846 .rpc_ops = &nfs_v2_clientops,
847 .proto = data->nfs_server.protocol,
850 struct rpc_timeout timeparms;
851 struct nfs_client *clp;
854 dprintk("--> nfs_init_server()\n");
857 if (data->version == 3)
858 cl_init.rpc_ops = &nfs_v3_clientops;
861 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
862 data->timeo, data->retrans);
864 /* Allocate or find a client reference we can use */
865 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX,
866 data->flags & NFS_MOUNT_NORESVPORT);
868 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
872 server->nfs_client = clp;
874 /* Initialise the client representation from the mount data */
875 server->flags = data->flags;
876 server->options = data->options;
877 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
878 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
879 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
882 server->rsize = nfs_block_size(data->rsize, NULL);
884 server->wsize = nfs_block_size(data->wsize, NULL);
886 server->acregmin = data->acregmin * HZ;
887 server->acregmax = data->acregmax * HZ;
888 server->acdirmin = data->acdirmin * HZ;
889 server->acdirmax = data->acdirmax * HZ;
891 /* Start lockd here, before we might error out */
892 error = nfs_start_lockd(server);
896 server->port = data->nfs_server.port;
898 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
902 /* Preserve the values of mount_server-related mount options */
903 if (data->mount_server.addrlen) {
904 memcpy(&server->mountd_address, &data->mount_server.address,
905 data->mount_server.addrlen);
906 server->mountd_addrlen = data->mount_server.addrlen;
908 server->mountd_version = data->mount_server.version;
909 server->mountd_port = data->mount_server.port;
910 server->mountd_protocol = data->mount_server.protocol;
912 server->namelen = data->namlen;
913 /* Create a client RPC handle for the NFSv3 ACL management interface */
914 nfs_init_server_aclclient(server);
915 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
919 server->nfs_client = NULL;
921 dprintk("<-- nfs_init_server() = xerror %d\n", error);
926 * Load up the server record from information gained in an fsinfo record
928 static void nfs_server_set_fsinfo(struct nfs_server *server,
929 struct nfs_fh *mntfh,
930 struct nfs_fsinfo *fsinfo)
932 unsigned long max_rpc_payload;
934 /* Work out a lot of parameters */
935 if (server->rsize == 0)
936 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
937 if (server->wsize == 0)
938 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
940 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
941 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
942 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
943 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
945 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
946 if (server->rsize > max_rpc_payload)
947 server->rsize = max_rpc_payload;
948 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
949 server->rsize = NFS_MAX_FILE_IO_SIZE;
950 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
952 server->backing_dev_info.name = "nfs";
953 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
955 if (server->wsize > max_rpc_payload)
956 server->wsize = max_rpc_payload;
957 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
958 server->wsize = NFS_MAX_FILE_IO_SIZE;
959 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
960 server->pnfs_blksize = fsinfo->blksize;
961 set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
963 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
965 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
966 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
967 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
968 if (server->dtsize > server->rsize)
969 server->dtsize = server->rsize;
971 if (server->flags & NFS_MOUNT_NOAC) {
972 server->acregmin = server->acregmax = 0;
973 server->acdirmin = server->acdirmax = 0;
976 server->maxfilesize = fsinfo->maxfilesize;
978 server->time_delta = fsinfo->time_delta;
980 /* We're airborne Set socket buffersize */
981 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
985 * Probe filesystem information, including the FSID on v2/v3
987 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
989 struct nfs_fsinfo fsinfo;
990 struct nfs_client *clp = server->nfs_client;
993 dprintk("--> nfs_probe_fsinfo()\n");
995 if (clp->rpc_ops->set_capabilities != NULL) {
996 error = clp->rpc_ops->set_capabilities(server, mntfh);
1001 fsinfo.fattr = fattr;
1002 fsinfo.layouttype = 0;
1003 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
1007 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
1009 /* Get some general file system info */
1010 if (server->namelen == 0) {
1011 struct nfs_pathconf pathinfo;
1013 pathinfo.fattr = fattr;
1014 nfs_fattr_init(fattr);
1016 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
1017 server->namelen = pathinfo.max_namelen;
1020 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1024 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1029 * Copy useful information when duplicating a server record
1031 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1033 target->flags = source->flags;
1034 target->rsize = source->rsize;
1035 target->wsize = source->wsize;
1036 target->acregmin = source->acregmin;
1037 target->acregmax = source->acregmax;
1038 target->acdirmin = source->acdirmin;
1039 target->acdirmax = source->acdirmax;
1040 target->caps = source->caps;
1041 target->options = source->options;
1044 static void nfs_server_insert_lists(struct nfs_server *server)
1046 struct nfs_client *clp = server->nfs_client;
1047 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
1049 spin_lock(&nn->nfs_client_lock);
1050 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
1051 list_add_tail(&server->master_link, &nn->nfs_volume_list);
1052 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1053 spin_unlock(&nn->nfs_client_lock);
1057 static void nfs_server_remove_lists(struct nfs_server *server)
1059 struct nfs_client *clp = server->nfs_client;
1064 nn = net_generic(clp->net, nfs_net_id);
1065 spin_lock(&nn->nfs_client_lock);
1066 list_del_rcu(&server->client_link);
1067 if (list_empty(&clp->cl_superblocks))
1068 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1069 list_del(&server->master_link);
1070 spin_unlock(&nn->nfs_client_lock);
1076 * Allocate and initialise a server record
1078 static struct nfs_server *nfs_alloc_server(void)
1080 struct nfs_server *server;
1082 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1086 server->client = server->client_acl = ERR_PTR(-EINVAL);
1088 /* Zero out the NFS state stuff */
1089 INIT_LIST_HEAD(&server->client_link);
1090 INIT_LIST_HEAD(&server->master_link);
1091 INIT_LIST_HEAD(&server->delegations);
1092 INIT_LIST_HEAD(&server->layouts);
1093 INIT_LIST_HEAD(&server->state_owners_lru);
1095 atomic_set(&server->active, 0);
1097 server->io_stats = nfs_alloc_iostats();
1098 if (!server->io_stats) {
1103 if (bdi_init(&server->backing_dev_info)) {
1104 nfs_free_iostats(server->io_stats);
1109 ida_init(&server->openowner_id);
1110 ida_init(&server->lockowner_id);
1111 pnfs_init_server(server);
1117 * Free up a server record
1119 void nfs_free_server(struct nfs_server *server)
1121 dprintk("--> nfs_free_server()\n");
1123 nfs_server_remove_lists(server);
1124 unset_pnfs_layoutdriver(server);
1126 if (server->destroy != NULL)
1127 server->destroy(server);
1129 if (!IS_ERR(server->client_acl))
1130 rpc_shutdown_client(server->client_acl);
1131 if (!IS_ERR(server->client))
1132 rpc_shutdown_client(server->client);
1134 nfs_put_client(server->nfs_client);
1136 ida_destroy(&server->lockowner_id);
1137 ida_destroy(&server->openowner_id);
1138 nfs_free_iostats(server->io_stats);
1139 bdi_destroy(&server->backing_dev_info);
1141 nfs_release_automount_timer();
1142 dprintk("<-- nfs_free_server()\n");
1146 * Create a version 2 or 3 volume record
1147 * - keyed on server and FSID
1149 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1150 struct nfs_fh *mntfh)
1152 struct nfs_server *server;
1153 struct nfs_fattr *fattr;
1156 server = nfs_alloc_server();
1158 return ERR_PTR(-ENOMEM);
1161 fattr = nfs_alloc_fattr();
1165 /* Get a client representation */
1166 error = nfs_init_server(server, data);
1170 BUG_ON(!server->nfs_client);
1171 BUG_ON(!server->nfs_client->rpc_ops);
1172 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1174 /* Probe the root fh to retrieve its FSID */
1175 error = nfs_probe_fsinfo(server, mntfh, fattr);
1178 if (server->nfs_client->rpc_ops->version == 3) {
1179 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1180 server->namelen = NFS3_MAXNAMLEN;
1181 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1182 server->caps |= NFS_CAP_READDIRPLUS;
1184 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1185 server->namelen = NFS2_MAXNAMLEN;
1188 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1189 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
1191 dprintk("nfs_create_server: getattr error = %d\n", -error);
1195 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
1197 dprintk("Server FSID: %llx:%llx\n",
1198 (unsigned long long) server->fsid.major,
1199 (unsigned long long) server->fsid.minor);
1201 nfs_server_insert_lists(server);
1202 server->mount_time = jiffies;
1203 nfs_free_fattr(fattr);
1207 nfs_free_fattr(fattr);
1208 nfs_free_server(server);
1209 return ERR_PTR(error);
1212 #ifdef CONFIG_NFS_V4
1214 * NFSv4.0 callback thread helper
1216 * Find a client by callback identifier
1219 nfs4_find_client_ident(struct net *net, int cb_ident)
1221 struct nfs_client *clp;
1222 struct nfs_net *nn = net_generic(net, nfs_net_id);
1224 spin_lock(&nn->nfs_client_lock);
1225 clp = idr_find(&nn->cb_ident_idr, cb_ident);
1227 atomic_inc(&clp->cl_count);
1228 spin_unlock(&nn->nfs_client_lock);
1232 #if defined(CONFIG_NFS_V4_1)
1234 * NFSv4.1 callback thread helper
1235 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1236 * minorversion, and sessionID
1238 * Returns NULL if no such client
1241 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1242 struct nfs4_sessionid *sid)
1244 struct nfs_client *clp;
1245 struct nfs_net *nn = net_generic(net, nfs_net_id);
1247 spin_lock(&nn->nfs_client_lock);
1248 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
1249 if (nfs4_cb_match_client(addr, clp, 1) == false)
1252 if (!nfs4_has_session(clp))
1255 /* Match sessionid*/
1256 if (memcmp(clp->cl_session->sess_id.data,
1257 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
1260 atomic_inc(&clp->cl_count);
1261 spin_unlock(&nn->nfs_client_lock);
1264 spin_unlock(&nn->nfs_client_lock);
1268 #else /* CONFIG_NFS_V4_1 */
1271 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1272 struct nfs4_sessionid *sid)
1276 #endif /* CONFIG_NFS_V4_1 */
1279 * Initialize the NFS4 callback service
1281 static int nfs4_init_callback(struct nfs_client *clp)
1285 if (clp->rpc_ops->version == 4) {
1286 if (nfs4_has_session(clp)) {
1287 error = xprt_setup_backchannel(
1288 clp->cl_rpcclient->cl_xprt,
1289 NFS41_BC_MIN_CALLBACKS);
1294 error = nfs_callback_up(clp->cl_mvops->minor_version,
1295 clp->cl_rpcclient->cl_xprt);
1297 dprintk("%s: failed to start callback. Error = %d\n",
1301 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1307 * Initialize the minor version specific parts of an NFS4 client record
1309 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1311 #if defined(CONFIG_NFS_V4_1)
1312 if (clp->cl_mvops->minor_version) {
1313 struct nfs4_session *session = NULL;
1315 * Create the session and mark it expired.
1316 * When a SEQUENCE operation encounters the expired session
1317 * it will do session recovery to initialize it.
1319 session = nfs4_alloc_session(clp);
1323 clp->cl_session = session;
1325 * The create session reply races with the server back
1326 * channel probe. Mark the client NFS_CS_SESSION_INITING
1327 * so that the client back channel can find the
1330 clp->cl_cons_state = NFS_CS_SESSION_INITING;
1332 #endif /* CONFIG_NFS_V4_1 */
1334 return nfs4_init_callback(clp);
1338 * Initialise an NFS4 client record
1340 int nfs4_init_client(struct nfs_client *clp,
1341 const struct rpc_timeout *timeparms,
1342 const char *ip_addr,
1343 rpc_authflavor_t authflavour,
1348 if (clp->cl_cons_state == NFS_CS_READY) {
1349 /* the client is initialised already */
1350 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1354 /* Check NFS protocol revision and initialize RPC op vector */
1355 clp->rpc_ops = &nfs_v4_clientops;
1357 error = nfs_create_rpc_client(clp, timeparms, authflavour,
1361 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1363 error = nfs_idmap_new(clp);
1365 dprintk("%s: failed to create idmapper. Error = %d\n",
1369 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1371 error = nfs4_init_client_minor_version(clp);
1375 if (!nfs4_has_session(clp))
1376 nfs_mark_client_ready(clp, NFS_CS_READY);
1380 nfs_mark_client_ready(clp, error);
1381 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1386 * Set up an NFS4 client
1388 static int nfs4_set_client(struct nfs_server *server,
1389 const char *hostname,
1390 const struct sockaddr *addr,
1391 const size_t addrlen,
1392 const char *ip_addr,
1393 rpc_authflavor_t authflavour,
1394 int proto, const struct rpc_timeout *timeparms,
1395 u32 minorversion, struct net *net)
1397 struct nfs_client_initdata cl_init = {
1398 .hostname = hostname,
1401 .rpc_ops = &nfs_v4_clientops,
1403 .minorversion = minorversion,
1406 struct nfs_client *clp;
1409 dprintk("--> nfs4_set_client()\n");
1411 /* Allocate or find a client reference we can use */
1412 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour,
1413 server->flags & NFS_MOUNT_NORESVPORT);
1415 error = PTR_ERR(clp);
1420 * Query for the lease time on clientid setup or renewal
1422 * Note that this will be set on nfs_clients that were created
1423 * only for the DS role and did not set this bit, but now will
1424 * serve a dual role.
1426 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1428 server->nfs_client = clp;
1429 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1432 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1437 * Set up a pNFS Data Server client.
1439 * Return any existing nfs_client that matches server address,port,version
1442 * For a new nfs_client, use a soft mount (default), a low retrans and a
1443 * low timeout interval so that if a connection is lost, we retry through
1446 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1447 const struct sockaddr *ds_addr,
1448 int ds_addrlen, int ds_proto)
1450 struct nfs_client_initdata cl_init = {
1452 .addrlen = ds_addrlen,
1453 .rpc_ops = &nfs_v4_clientops,
1455 .minorversion = mds_clp->cl_minorversion,
1456 .net = mds_clp->net,
1458 struct rpc_timeout ds_timeout = {
1459 .to_initval = 15 * HZ,
1460 .to_maxval = 15 * HZ,
1462 .to_exponential = 1,
1464 struct nfs_client *clp;
1467 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1468 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1469 * (section 13.1 RFC 5661).
1471 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1472 mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
1474 dprintk("<-- %s %p\n", __func__, clp);
1477 EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
1480 * Session has been established, and the client marked ready.
1481 * Set the mount rsize and wsize with negotiated fore channel
1482 * attributes which will be bound checked in nfs_server_set_fsinfo.
1484 static void nfs4_session_set_rwsize(struct nfs_server *server)
1486 #ifdef CONFIG_NFS_V4_1
1487 struct nfs4_session *sess;
1491 if (!nfs4_has_session(server->nfs_client))
1493 sess = server->nfs_client->cl_session;
1494 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1495 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1497 if (server->rsize > server_resp_sz)
1498 server->rsize = server_resp_sz;
1499 if (server->wsize > server_rqst_sz)
1500 server->wsize = server_rqst_sz;
1501 #endif /* CONFIG_NFS_V4_1 */
1504 static int nfs4_server_common_setup(struct nfs_server *server,
1505 struct nfs_fh *mntfh)
1507 struct nfs_fattr *fattr;
1510 BUG_ON(!server->nfs_client);
1511 BUG_ON(!server->nfs_client->rpc_ops);
1512 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1514 /* data servers support only a subset of NFSv4.1 */
1515 if (is_ds_only_client(server->nfs_client))
1516 return -EPROTONOSUPPORT;
1518 fattr = nfs_alloc_fattr();
1522 /* We must ensure the session is initialised first */
1523 error = nfs4_init_session(server);
1527 /* Probe the root fh to retrieve its FSID and filehandle */
1528 error = nfs4_get_rootfh(server, mntfh);
1532 dprintk("Server FSID: %llx:%llx\n",
1533 (unsigned long long) server->fsid.major,
1534 (unsigned long long) server->fsid.minor);
1535 dprintk("Mount FH: %d\n", mntfh->size);
1537 nfs4_session_set_rwsize(server);
1539 error = nfs_probe_fsinfo(server, mntfh, fattr);
1543 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1544 server->namelen = NFS4_MAXNAMLEN;
1546 nfs_server_insert_lists(server);
1547 server->mount_time = jiffies;
1548 server->destroy = nfs4_destroy_server;
1550 nfs_free_fattr(fattr);
1555 * Create a version 4 volume record
1557 static int nfs4_init_server(struct nfs_server *server,
1558 const struct nfs_parsed_mount_data *data)
1560 struct rpc_timeout timeparms;
1563 dprintk("--> nfs4_init_server()\n");
1565 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1566 data->timeo, data->retrans);
1568 /* Initialise the client representation from the mount data */
1569 server->flags = data->flags;
1570 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1571 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1572 server->caps |= NFS_CAP_READDIRPLUS;
1573 server->options = data->options;
1575 /* Get a client record */
1576 error = nfs4_set_client(server,
1577 data->nfs_server.hostname,
1578 (const struct sockaddr *)&data->nfs_server.address,
1579 data->nfs_server.addrlen,
1580 data->client_address,
1581 data->auth_flavors[0],
1582 data->nfs_server.protocol,
1590 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1593 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1594 server->caps |= NFS_CAP_UIDGID_NOMAP;
1597 server->rsize = nfs_block_size(data->rsize, NULL);
1599 server->wsize = nfs_block_size(data->wsize, NULL);
1601 server->acregmin = data->acregmin * HZ;
1602 server->acregmax = data->acregmax * HZ;
1603 server->acdirmin = data->acdirmin * HZ;
1604 server->acdirmax = data->acdirmax * HZ;
1606 server->port = data->nfs_server.port;
1608 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1612 dprintk("<-- nfs4_init_server() = %d\n", error);
1617 * Create a version 4 volume record
1618 * - keyed on server and FSID
1620 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1621 struct nfs_fh *mntfh)
1623 struct nfs_server *server;
1626 dprintk("--> nfs4_create_server()\n");
1628 server = nfs_alloc_server();
1630 return ERR_PTR(-ENOMEM);
1632 /* set up the general RPC client */
1633 error = nfs4_init_server(server, data);
1637 error = nfs4_server_common_setup(server, mntfh);
1641 dprintk("<-- nfs4_create_server() = %p\n", server);
1645 nfs_free_server(server);
1646 dprintk("<-- nfs4_create_server() = error %d\n", error);
1647 return ERR_PTR(error);
1651 * Create an NFS4 referral server record
1653 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1654 struct nfs_fh *mntfh)
1656 struct nfs_client *parent_client;
1657 struct nfs_server *server, *parent_server;
1660 dprintk("--> nfs4_create_referral_server()\n");
1662 server = nfs_alloc_server();
1664 return ERR_PTR(-ENOMEM);
1666 parent_server = NFS_SB(data->sb);
1667 parent_client = parent_server->nfs_client;
1669 /* Initialise the client representation from the parent server */
1670 nfs_server_copy_userdata(server, parent_server);
1671 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
1673 /* Get a client representation.
1674 * Note: NFSv4 always uses TCP, */
1675 error = nfs4_set_client(server, data->hostname,
1678 parent_client->cl_ipaddr,
1680 parent_server->client->cl_xprt->prot,
1681 parent_server->client->cl_timeout,
1682 parent_client->cl_mvops->minor_version,
1683 parent_client->net);
1687 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1691 error = nfs4_server_common_setup(server, mntfh);
1695 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1699 nfs_free_server(server);
1700 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1701 return ERR_PTR(error);
1704 #endif /* CONFIG_NFS_V4 */
1707 * Clone an NFS2, NFS3 or NFS4 server record
1709 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1711 struct nfs_fattr *fattr)
1713 struct nfs_server *server;
1714 struct nfs_fattr *fattr_fsinfo;
1717 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1718 (unsigned long long) fattr->fsid.major,
1719 (unsigned long long) fattr->fsid.minor);
1721 server = nfs_alloc_server();
1723 return ERR_PTR(-ENOMEM);
1726 fattr_fsinfo = nfs_alloc_fattr();
1727 if (fattr_fsinfo == NULL)
1728 goto out_free_server;
1730 /* Copy data from the source */
1731 server->nfs_client = source->nfs_client;
1732 server->destroy = source->destroy;
1733 atomic_inc(&server->nfs_client->cl_count);
1734 nfs_server_copy_userdata(server, source);
1736 server->fsid = fattr->fsid;
1738 error = nfs_init_server_rpcclient(server,
1739 source->client->cl_timeout,
1740 source->client->cl_auth->au_flavor);
1742 goto out_free_server;
1743 if (!IS_ERR(source->client_acl))
1744 nfs_init_server_aclclient(server);
1746 /* probe the filesystem info for this server filesystem */
1747 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1749 goto out_free_server;
1751 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1752 server->namelen = NFS4_MAXNAMLEN;
1754 dprintk("Cloned FSID: %llx:%llx\n",
1755 (unsigned long long) server->fsid.major,
1756 (unsigned long long) server->fsid.minor);
1758 error = nfs_start_lockd(server);
1760 goto out_free_server;
1762 nfs_server_insert_lists(server);
1763 server->mount_time = jiffies;
1765 nfs_free_fattr(fattr_fsinfo);
1766 dprintk("<-- nfs_clone_server() = %p\n", server);
1770 nfs_free_fattr(fattr_fsinfo);
1771 nfs_free_server(server);
1772 dprintk("<-- nfs_clone_server() = error %d\n", error);
1773 return ERR_PTR(error);
1776 void nfs_clients_init(struct net *net)
1778 struct nfs_net *nn = net_generic(net, nfs_net_id);
1780 INIT_LIST_HEAD(&nn->nfs_client_list);
1781 INIT_LIST_HEAD(&nn->nfs_volume_list);
1782 #ifdef CONFIG_NFS_V4
1783 idr_init(&nn->cb_ident_idr);
1785 spin_lock_init(&nn->nfs_client_lock);
1788 #ifdef CONFIG_PROC_FS
1789 static struct proc_dir_entry *proc_fs_nfs;
1791 static int nfs_server_list_open(struct inode *inode, struct file *file);
1792 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1793 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1794 static void nfs_server_list_stop(struct seq_file *p, void *v);
1795 static int nfs_server_list_show(struct seq_file *m, void *v);
1797 static const struct seq_operations nfs_server_list_ops = {
1798 .start = nfs_server_list_start,
1799 .next = nfs_server_list_next,
1800 .stop = nfs_server_list_stop,
1801 .show = nfs_server_list_show,
1804 static const struct file_operations nfs_server_list_fops = {
1805 .open = nfs_server_list_open,
1807 .llseek = seq_lseek,
1808 .release = seq_release,
1809 .owner = THIS_MODULE,
1812 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1813 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1814 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1815 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1816 static int nfs_volume_list_show(struct seq_file *m, void *v);
1818 static const struct seq_operations nfs_volume_list_ops = {
1819 .start = nfs_volume_list_start,
1820 .next = nfs_volume_list_next,
1821 .stop = nfs_volume_list_stop,
1822 .show = nfs_volume_list_show,
1825 static const struct file_operations nfs_volume_list_fops = {
1826 .open = nfs_volume_list_open,
1828 .llseek = seq_lseek,
1829 .release = seq_release,
1830 .owner = THIS_MODULE,
1834 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1837 static int nfs_server_list_open(struct inode *inode, struct file *file)
1841 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1842 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1844 ret = seq_open(file, &nfs_server_list_ops);
1848 m = file->private_data;
1855 * set up the iterator to start reading from the server list and return the first item
1857 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1859 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1861 /* lock the list against modification */
1862 spin_lock(&nn->nfs_client_lock);
1863 return seq_list_start_head(&nn->nfs_client_list, *_pos);
1867 * move to next server
1869 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1871 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1873 return seq_list_next(v, &nn->nfs_client_list, pos);
1877 * clean up after reading from the transports list
1879 static void nfs_server_list_stop(struct seq_file *p, void *v)
1881 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1883 spin_unlock(&nn->nfs_client_lock);
1887 * display a header line followed by a load of call lines
1889 static int nfs_server_list_show(struct seq_file *m, void *v)
1891 struct nfs_client *clp;
1892 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1894 /* display header on line 1 */
1895 if (v == &nn->nfs_client_list) {
1896 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1900 /* display one transport per line on subsequent lines */
1901 clp = list_entry(v, struct nfs_client, cl_share_link);
1903 /* Check if the client is initialized */
1904 if (clp->cl_cons_state != NFS_CS_READY)
1907 seq_printf(m, "v%u %s %s %3d %s\n",
1908 clp->rpc_ops->version,
1909 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1910 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1911 atomic_read(&clp->cl_count),
1918 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1920 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1924 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1925 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1927 ret = seq_open(file, &nfs_volume_list_ops);
1931 m = file->private_data;
1938 * set up the iterator to start reading from the volume list and return the first item
1940 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1942 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1944 /* lock the list against modification */
1945 spin_lock(&nn->nfs_client_lock);
1946 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
1950 * move to next volume
1952 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1954 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1956 return seq_list_next(v, &nn->nfs_volume_list, pos);
1960 * clean up after reading from the transports list
1962 static void nfs_volume_list_stop(struct seq_file *p, void *v)
1964 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1966 spin_unlock(&nn->nfs_client_lock);
1970 * display a header line followed by a load of call lines
1972 static int nfs_volume_list_show(struct seq_file *m, void *v)
1974 struct nfs_server *server;
1975 struct nfs_client *clp;
1976 char dev[8], fsid[17];
1977 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1979 /* display header on line 1 */
1980 if (v == &nn->nfs_volume_list) {
1981 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
1984 /* display one transport per line on subsequent lines */
1985 server = list_entry(v, struct nfs_server, master_link);
1986 clp = server->nfs_client;
1988 snprintf(dev, 8, "%u:%u",
1989 MAJOR(server->s_dev), MINOR(server->s_dev));
1991 snprintf(fsid, 17, "%llx:%llx",
1992 (unsigned long long) server->fsid.major,
1993 (unsigned long long) server->fsid.minor);
1995 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
1996 clp->rpc_ops->version,
1997 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1998 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
2001 nfs_server_fscache_state(server));
2007 * initialise the /proc/fs/nfsfs/ directory
2009 int __init nfs_fs_proc_init(void)
2011 struct proc_dir_entry *p;
2013 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
2017 /* a file of servers with which we're dealing */
2018 p = proc_create("servers", S_IFREG|S_IRUGO,
2019 proc_fs_nfs, &nfs_server_list_fops);
2023 /* a file of volumes that we have mounted */
2024 p = proc_create("volumes", S_IFREG|S_IRUGO,
2025 proc_fs_nfs, &nfs_volume_list_fops);
2031 remove_proc_entry("servers", proc_fs_nfs);
2033 remove_proc_entry("fs/nfsfs", NULL);
2039 * clean up the /proc/fs/nfsfs/ directory
2041 void nfs_fs_proc_exit(void)
2043 remove_proc_entry("volumes", proc_fs_nfs);
2044 remove_proc_entry("servers", proc_fs_nfs);
2045 remove_proc_entry("fs/nfsfs", NULL);
2048 #endif /* CONFIG_PROC_FS */
2050 module_param(nfs4_disable_idmapping, bool, 0644);
2051 MODULE_PARM_DESC(nfs4_disable_idmapping,
2052 "Turn off NFSv4 idmapping when using 'sec=sys'");