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 = 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_destroy_session(clp->cl_session);
210 #else /* CONFIG_NFS_V4_1 */
211 static void nfs4_shutdown_session(struct nfs_client *clp)
214 #endif /* CONFIG_NFS_V4_1 */
217 * Destroy the NFS4 callback service
219 static void nfs4_destroy_callback(struct nfs_client *clp)
221 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
222 nfs_callback_down(clp->cl_mvops->minor_version);
225 static void nfs4_shutdown_client(struct nfs_client *clp)
227 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
228 nfs4_kill_renewd(clp);
229 nfs4_shutdown_session(clp);
230 nfs4_destroy_callback(clp);
231 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
232 nfs_idmap_delete(clp);
234 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
237 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
238 void nfs_cleanup_cb_ident_idr(struct net *net)
240 struct nfs_net *nn = net_generic(net, nfs_net_id);
242 idr_destroy(&nn->cb_ident_idr);
245 /* nfs_client_lock held */
246 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
248 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
250 if (clp->cl_cb_ident)
251 idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
254 static void pnfs_init_server(struct nfs_server *server)
256 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
259 static void nfs4_destroy_server(struct nfs_server *server)
261 nfs4_purge_state_owners(server);
265 static void nfs4_shutdown_client(struct nfs_client *clp)
269 void nfs_cleanup_cb_ident_idr(struct net *net)
273 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
277 static void pnfs_init_server(struct nfs_server *server)
281 #endif /* CONFIG_NFS_V4 */
284 * Destroy a shared client record
286 static void nfs_free_client(struct nfs_client *clp)
288 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
290 nfs4_shutdown_client(clp);
292 nfs_fscache_release_client_cookie(clp);
294 /* -EIO all pending I/O */
295 if (!IS_ERR(clp->cl_rpcclient))
296 rpc_shutdown_client(clp->cl_rpcclient);
298 if (clp->cl_machine_cred != NULL)
299 put_rpccred(clp->cl_machine_cred);
301 nfs4_deviceid_purge_client(clp);
303 kfree(clp->cl_hostname);
304 kfree(clp->server_scope);
307 dprintk("<-- nfs_free_client()\n");
311 * Release a reference to a shared client record
313 void nfs_put_client(struct nfs_client *clp)
320 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
321 nn = net_generic(clp->net, nfs_net_id);
323 if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
324 list_del(&clp->cl_share_link);
325 nfs_cb_idr_remove_locked(clp);
326 spin_unlock(&nn->nfs_client_lock);
328 BUG_ON(!list_empty(&clp->cl_superblocks));
330 nfs_free_client(clp);
333 EXPORT_SYMBOL_GPL(nfs_put_client);
335 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
337 * Test if two ip6 socket addresses refer to the same socket by
338 * comparing relevant fields. The padding bytes specifically, are not
339 * compared. sin6_flowinfo is not compared because it only affects QoS
340 * and sin6_scope_id is only compared if the address is "link local"
341 * because "link local" addresses need only be unique to a specific
342 * link. Conversely, ordinary unicast addresses might have different
345 * The caller should ensure both socket addresses are AF_INET6.
347 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
348 const struct sockaddr *sa2)
350 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
351 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
353 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
355 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
356 return sin1->sin6_scope_id == sin2->sin6_scope_id;
360 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
361 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
362 const struct sockaddr *sa2)
369 * Test if two ip4 socket addresses refer to the same socket, by
370 * comparing relevant fields. The padding bytes specifically, are
373 * The caller should ensure both socket addresses are AF_INET.
375 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
376 const struct sockaddr *sa2)
378 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
379 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
381 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
384 static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
385 const struct sockaddr *sa2)
387 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
388 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
390 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
391 (sin1->sin6_port == sin2->sin6_port);
394 static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
395 const struct sockaddr *sa2)
397 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
398 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
400 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
401 (sin1->sin_port == sin2->sin_port);
405 * Test if two socket addresses represent the same actual socket,
406 * by comparing (only) relevant fields, excluding the port number.
408 static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
409 const struct sockaddr *sa2)
411 if (sa1->sa_family != sa2->sa_family)
414 switch (sa1->sa_family) {
416 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
418 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
424 * Test if two socket addresses represent the same actual socket,
425 * by comparing (only) relevant fields, including the port number.
427 static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
428 const struct sockaddr *sa2)
430 if (sa1->sa_family != sa2->sa_family)
433 switch (sa1->sa_family) {
435 return nfs_sockaddr_cmp_ip4(sa1, sa2);
437 return nfs_sockaddr_cmp_ip6(sa1, sa2);
442 /* Common match routine for v4.0 and v4.1 callback services */
444 nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp,
447 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
449 /* Don't match clients that failed to initialise */
450 if (!(clp->cl_cons_state == NFS_CS_READY ||
451 clp->cl_cons_state == NFS_CS_SESSION_INITING))
454 /* Match the version and minorversion */
455 if (clp->rpc_ops->version != 4 ||
456 clp->cl_minorversion != minorversion)
459 /* Match only the IP address, not the port number */
460 if (!nfs_sockaddr_match_ipaddr(addr, clap))
467 * Find an nfs_client on the list that matches the initialisation data
470 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
472 struct nfs_client *clp;
473 const struct sockaddr *sap = data->addr;
474 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
476 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
477 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
478 /* Don't match clients that failed to initialise properly */
479 if (clp->cl_cons_state < 0)
482 /* Different NFS versions cannot share the same nfs_client */
483 if (clp->rpc_ops != data->rpc_ops)
486 if (clp->cl_proto != data->proto)
488 /* Match nfsv4 minorversion */
489 if (clp->cl_minorversion != data->minorversion)
491 /* Match the full socket address */
492 if (!nfs_sockaddr_cmp(sap, clap))
495 atomic_inc(&clp->cl_count);
502 * Look up a client by IP address and protocol version
503 * - creates a new record if one doesn't yet exist
505 static struct nfs_client *
506 nfs_get_client(const struct nfs_client_initdata *cl_init,
507 const struct rpc_timeout *timeparms,
509 rpc_authflavor_t authflavour,
512 struct nfs_client *clp, *new = NULL;
514 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
516 dprintk("--> nfs_get_client(%s,v%u)\n",
517 cl_init->hostname ?: "", cl_init->rpc_ops->version);
519 /* see if the client already exists */
521 spin_lock(&nn->nfs_client_lock);
523 clp = nfs_match_client(cl_init);
529 spin_unlock(&nn->nfs_client_lock);
531 new = nfs_alloc_client(cl_init);
532 } while (!IS_ERR(new));
534 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
537 /* install a new client and return with it unready */
540 list_add(&clp->cl_share_link, &nn->nfs_client_list);
541 spin_unlock(&nn->nfs_client_lock);
543 error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
544 authflavour, noresvport);
547 return ERR_PTR(error);
549 dprintk("--> nfs_get_client() = %p [new]\n", clp);
552 /* found an existing client
553 * - make sure it's ready before returning
556 spin_unlock(&nn->nfs_client_lock);
559 nfs_free_client(new);
561 error = wait_event_killable(nfs_client_active_wq,
562 clp->cl_cons_state < NFS_CS_INITING);
565 return ERR_PTR(-ERESTARTSYS);
568 if (clp->cl_cons_state < NFS_CS_READY) {
569 error = clp->cl_cons_state;
571 return ERR_PTR(error);
574 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
576 dprintk("--> nfs_get_client() = %p [share]\n", clp);
581 * Mark a server as ready or failed
583 void nfs_mark_client_ready(struct nfs_client *clp, int state)
585 clp->cl_cons_state = state;
586 wake_up_all(&nfs_client_active_wq);
590 * With sessions, the client is not marked ready until after a
591 * successful EXCHANGE_ID and CREATE_SESSION.
593 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
594 * other versions of NFS can be tried.
596 int nfs4_check_client_ready(struct nfs_client *clp)
598 if (!nfs4_has_session(clp))
600 if (clp->cl_cons_state < NFS_CS_READY)
601 return -EPROTONOSUPPORT;
606 * Initialise the timeout values for a connection
608 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
609 unsigned int timeo, unsigned int retrans)
611 to->to_initval = timeo * HZ / 10;
612 to->to_retries = retrans;
615 case XPRT_TRANSPORT_TCP:
616 case XPRT_TRANSPORT_RDMA:
617 if (to->to_retries == 0)
618 to->to_retries = NFS_DEF_TCP_RETRANS;
619 if (to->to_initval == 0)
620 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
621 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
622 to->to_initval = NFS_MAX_TCP_TIMEOUT;
623 to->to_increment = to->to_initval;
624 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
625 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
626 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
627 if (to->to_maxval < to->to_initval)
628 to->to_maxval = to->to_initval;
629 to->to_exponential = 0;
631 case XPRT_TRANSPORT_UDP:
632 if (to->to_retries == 0)
633 to->to_retries = NFS_DEF_UDP_RETRANS;
635 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
636 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
637 to->to_initval = NFS_MAX_UDP_TIMEOUT;
638 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
639 to->to_exponential = 1;
647 * Create an RPC client handle
649 static int nfs_create_rpc_client(struct nfs_client *clp,
650 const struct rpc_timeout *timeparms,
651 rpc_authflavor_t flavor,
652 int discrtry, int noresvport)
654 struct rpc_clnt *clnt = NULL;
655 struct rpc_create_args args = {
657 .protocol = clp->cl_proto,
658 .address = (struct sockaddr *)&clp->cl_addr,
659 .addrsize = clp->cl_addrlen,
660 .timeout = timeparms,
661 .servername = clp->cl_hostname,
662 .program = &nfs_program,
663 .version = clp->rpc_ops->version,
664 .authflavor = flavor,
668 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
670 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
672 if (!IS_ERR(clp->cl_rpcclient))
675 clnt = rpc_create(&args);
677 dprintk("%s: cannot create RPC client. Error = %ld\n",
678 __func__, PTR_ERR(clnt));
679 return PTR_ERR(clnt);
682 clp->cl_rpcclient = clnt;
687 * Version 2 or 3 client destruction
689 static void nfs_destroy_server(struct nfs_server *server)
691 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
692 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
693 nlmclnt_done(server->nlm_host);
697 * Version 2 or 3 lockd setup
699 static int nfs_start_lockd(struct nfs_server *server)
701 struct nlm_host *host;
702 struct nfs_client *clp = server->nfs_client;
703 struct nlmclnt_initdata nlm_init = {
704 .hostname = clp->cl_hostname,
705 .address = (struct sockaddr *)&clp->cl_addr,
706 .addrlen = clp->cl_addrlen,
707 .nfs_version = clp->rpc_ops->version,
708 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
713 if (nlm_init.nfs_version > 3)
715 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
716 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
719 switch (clp->cl_proto) {
721 nlm_init.protocol = IPPROTO_TCP;
723 case XPRT_TRANSPORT_UDP:
724 nlm_init.protocol = IPPROTO_UDP;
727 host = nlmclnt_init(&nlm_init);
729 return PTR_ERR(host);
731 server->nlm_host = host;
732 server->destroy = nfs_destroy_server;
737 * Initialise an NFSv3 ACL client connection
739 #ifdef CONFIG_NFS_V3_ACL
740 static void nfs_init_server_aclclient(struct nfs_server *server)
742 if (server->nfs_client->rpc_ops->version != 3)
744 if (server->flags & NFS_MOUNT_NOACL)
747 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
748 if (IS_ERR(server->client_acl))
751 /* No errors! Assume that Sun nfsacls are supported */
752 server->caps |= NFS_CAP_ACLS;
756 server->caps &= ~NFS_CAP_ACLS;
759 static inline void nfs_init_server_aclclient(struct nfs_server *server)
761 server->flags &= ~NFS_MOUNT_NOACL;
762 server->caps &= ~NFS_CAP_ACLS;
767 * Create a general RPC client
769 static int nfs_init_server_rpcclient(struct nfs_server *server,
770 const struct rpc_timeout *timeo,
771 rpc_authflavor_t pseudoflavour)
773 struct nfs_client *clp = server->nfs_client;
775 server->client = rpc_clone_client(clp->cl_rpcclient);
776 if (IS_ERR(server->client)) {
777 dprintk("%s: couldn't create rpc_client!\n", __func__);
778 return PTR_ERR(server->client);
781 memcpy(&server->client->cl_timeout_default,
783 sizeof(server->client->cl_timeout_default));
784 server->client->cl_timeout = &server->client->cl_timeout_default;
786 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
787 struct rpc_auth *auth;
789 auth = rpcauth_create(pseudoflavour, server->client);
791 dprintk("%s: couldn't create credcache!\n", __func__);
792 return PTR_ERR(auth);
795 server->client->cl_softrtry = 0;
796 if (server->flags & NFS_MOUNT_SOFT)
797 server->client->cl_softrtry = 1;
803 * Initialise an NFS2 or NFS3 client
805 int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
806 const char *ip_addr, rpc_authflavor_t authflavour,
811 if (clp->cl_cons_state == NFS_CS_READY) {
812 /* the client is already initialised */
813 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
818 * Create a client RPC handle for doing FSSTAT with UNIX auth only
819 * - RFC 2623, sec 2.3.2
821 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
825 nfs_mark_client_ready(clp, NFS_CS_READY);
829 nfs_mark_client_ready(clp, error);
830 dprintk("<-- nfs_init_client() = xerror %d\n", error);
835 * Create a version 2 or 3 client
837 static int nfs_init_server(struct nfs_server *server,
838 const struct nfs_parsed_mount_data *data)
840 struct nfs_client_initdata cl_init = {
841 .hostname = data->nfs_server.hostname,
842 .addr = (const struct sockaddr *)&data->nfs_server.address,
843 .addrlen = data->nfs_server.addrlen,
844 .rpc_ops = &nfs_v2_clientops,
845 .proto = data->nfs_server.protocol,
848 struct rpc_timeout timeparms;
849 struct nfs_client *clp;
852 dprintk("--> nfs_init_server()\n");
855 if (data->version == 3)
856 cl_init.rpc_ops = &nfs_v3_clientops;
859 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
860 data->timeo, data->retrans);
862 /* Allocate or find a client reference we can use */
863 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX,
864 data->flags & NFS_MOUNT_NORESVPORT);
866 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
870 server->nfs_client = clp;
872 /* Initialise the client representation from the mount data */
873 server->flags = data->flags;
874 server->options = data->options;
875 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
876 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
877 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
880 server->rsize = nfs_block_size(data->rsize, NULL);
882 server->wsize = nfs_block_size(data->wsize, NULL);
884 server->acregmin = data->acregmin * HZ;
885 server->acregmax = data->acregmax * HZ;
886 server->acdirmin = data->acdirmin * HZ;
887 server->acdirmax = data->acdirmax * HZ;
889 /* Start lockd here, before we might error out */
890 error = nfs_start_lockd(server);
894 server->port = data->nfs_server.port;
896 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
900 /* Preserve the values of mount_server-related mount options */
901 if (data->mount_server.addrlen) {
902 memcpy(&server->mountd_address, &data->mount_server.address,
903 data->mount_server.addrlen);
904 server->mountd_addrlen = data->mount_server.addrlen;
906 server->mountd_version = data->mount_server.version;
907 server->mountd_port = data->mount_server.port;
908 server->mountd_protocol = data->mount_server.protocol;
910 server->namelen = data->namlen;
911 /* Create a client RPC handle for the NFSv3 ACL management interface */
912 nfs_init_server_aclclient(server);
913 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
917 server->nfs_client = NULL;
919 dprintk("<-- nfs_init_server() = xerror %d\n", error);
924 * Load up the server record from information gained in an fsinfo record
926 static void nfs_server_set_fsinfo(struct nfs_server *server,
927 struct nfs_fh *mntfh,
928 struct nfs_fsinfo *fsinfo)
930 unsigned long max_rpc_payload;
932 /* Work out a lot of parameters */
933 if (server->rsize == 0)
934 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
935 if (server->wsize == 0)
936 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
938 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
939 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
940 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
941 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
943 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
944 if (server->rsize > max_rpc_payload)
945 server->rsize = max_rpc_payload;
946 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
947 server->rsize = NFS_MAX_FILE_IO_SIZE;
948 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
950 server->backing_dev_info.name = "nfs";
951 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
953 if (server->wsize > max_rpc_payload)
954 server->wsize = max_rpc_payload;
955 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
956 server->wsize = NFS_MAX_FILE_IO_SIZE;
957 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
958 server->pnfs_blksize = fsinfo->blksize;
959 set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
961 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
963 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
964 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
965 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
966 if (server->dtsize > server->rsize)
967 server->dtsize = server->rsize;
969 if (server->flags & NFS_MOUNT_NOAC) {
970 server->acregmin = server->acregmax = 0;
971 server->acdirmin = server->acdirmax = 0;
974 server->maxfilesize = fsinfo->maxfilesize;
976 server->time_delta = fsinfo->time_delta;
978 /* We're airborne Set socket buffersize */
979 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
983 * Probe filesystem information, including the FSID on v2/v3
985 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
987 struct nfs_fsinfo fsinfo;
988 struct nfs_client *clp = server->nfs_client;
991 dprintk("--> nfs_probe_fsinfo()\n");
993 if (clp->rpc_ops->set_capabilities != NULL) {
994 error = clp->rpc_ops->set_capabilities(server, mntfh);
999 fsinfo.fattr = fattr;
1000 fsinfo.layouttype = 0;
1001 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
1005 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
1007 /* Get some general file system info */
1008 if (server->namelen == 0) {
1009 struct nfs_pathconf pathinfo;
1011 pathinfo.fattr = fattr;
1012 nfs_fattr_init(fattr);
1014 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
1015 server->namelen = pathinfo.max_namelen;
1018 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1022 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1027 * Copy useful information when duplicating a server record
1029 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1031 target->flags = source->flags;
1032 target->rsize = source->rsize;
1033 target->wsize = source->wsize;
1034 target->acregmin = source->acregmin;
1035 target->acregmax = source->acregmax;
1036 target->acdirmin = source->acdirmin;
1037 target->acdirmax = source->acdirmax;
1038 target->caps = source->caps;
1039 target->options = source->options;
1042 static void nfs_server_insert_lists(struct nfs_server *server)
1044 struct nfs_client *clp = server->nfs_client;
1045 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
1047 spin_lock(&nn->nfs_client_lock);
1048 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
1049 list_add_tail(&server->master_link, &nn->nfs_volume_list);
1050 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1051 spin_unlock(&nn->nfs_client_lock);
1055 static void nfs_server_remove_lists(struct nfs_server *server)
1057 struct nfs_client *clp = server->nfs_client;
1062 nn = net_generic(clp->net, nfs_net_id);
1063 spin_lock(&nn->nfs_client_lock);
1064 list_del_rcu(&server->client_link);
1065 if (list_empty(&clp->cl_superblocks))
1066 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1067 list_del(&server->master_link);
1068 spin_unlock(&nn->nfs_client_lock);
1074 * Allocate and initialise a server record
1076 static struct nfs_server *nfs_alloc_server(void)
1078 struct nfs_server *server;
1080 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1084 server->client = server->client_acl = ERR_PTR(-EINVAL);
1086 /* Zero out the NFS state stuff */
1087 INIT_LIST_HEAD(&server->client_link);
1088 INIT_LIST_HEAD(&server->master_link);
1089 INIT_LIST_HEAD(&server->delegations);
1090 INIT_LIST_HEAD(&server->layouts);
1091 INIT_LIST_HEAD(&server->state_owners_lru);
1093 atomic_set(&server->active, 0);
1095 server->io_stats = nfs_alloc_iostats();
1096 if (!server->io_stats) {
1101 if (bdi_init(&server->backing_dev_info)) {
1102 nfs_free_iostats(server->io_stats);
1107 ida_init(&server->openowner_id);
1108 ida_init(&server->lockowner_id);
1109 pnfs_init_server(server);
1115 * Free up a server record
1117 void nfs_free_server(struct nfs_server *server)
1119 dprintk("--> nfs_free_server()\n");
1121 nfs_server_remove_lists(server);
1122 unset_pnfs_layoutdriver(server);
1124 if (server->destroy != NULL)
1125 server->destroy(server);
1127 if (!IS_ERR(server->client_acl))
1128 rpc_shutdown_client(server->client_acl);
1129 if (!IS_ERR(server->client))
1130 rpc_shutdown_client(server->client);
1132 nfs_put_client(server->nfs_client);
1134 ida_destroy(&server->lockowner_id);
1135 ida_destroy(&server->openowner_id);
1136 nfs_free_iostats(server->io_stats);
1137 bdi_destroy(&server->backing_dev_info);
1139 nfs_release_automount_timer();
1140 dprintk("<-- nfs_free_server()\n");
1144 * Create a version 2 or 3 volume record
1145 * - keyed on server and FSID
1147 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1148 struct nfs_fh *mntfh)
1150 struct nfs_server *server;
1151 struct nfs_fattr *fattr;
1154 server = nfs_alloc_server();
1156 return ERR_PTR(-ENOMEM);
1159 fattr = nfs_alloc_fattr();
1163 /* Get a client representation */
1164 error = nfs_init_server(server, data);
1168 BUG_ON(!server->nfs_client);
1169 BUG_ON(!server->nfs_client->rpc_ops);
1170 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1172 /* Probe the root fh to retrieve its FSID */
1173 error = nfs_probe_fsinfo(server, mntfh, fattr);
1176 if (server->nfs_client->rpc_ops->version == 3) {
1177 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1178 server->namelen = NFS3_MAXNAMLEN;
1179 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1180 server->caps |= NFS_CAP_READDIRPLUS;
1182 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1183 server->namelen = NFS2_MAXNAMLEN;
1186 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1187 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
1189 dprintk("nfs_create_server: getattr error = %d\n", -error);
1193 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
1195 dprintk("Server FSID: %llx:%llx\n",
1196 (unsigned long long) server->fsid.major,
1197 (unsigned long long) server->fsid.minor);
1199 nfs_server_insert_lists(server);
1200 server->mount_time = jiffies;
1201 nfs_free_fattr(fattr);
1205 nfs_free_fattr(fattr);
1206 nfs_free_server(server);
1207 return ERR_PTR(error);
1210 #ifdef CONFIG_NFS_V4
1212 * NFSv4.0 callback thread helper
1214 * Find a client by callback identifier
1217 nfs4_find_client_ident(struct net *net, int cb_ident)
1219 struct nfs_client *clp;
1220 struct nfs_net *nn = net_generic(net, nfs_net_id);
1222 spin_lock(&nn->nfs_client_lock);
1223 clp = idr_find(&nn->cb_ident_idr, cb_ident);
1225 atomic_inc(&clp->cl_count);
1226 spin_unlock(&nn->nfs_client_lock);
1230 #if defined(CONFIG_NFS_V4_1)
1232 * NFSv4.1 callback thread helper
1233 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1234 * minorversion, and sessionID
1236 * Returns NULL if no such client
1239 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1240 struct nfs4_sessionid *sid)
1242 struct nfs_client *clp;
1243 struct nfs_net *nn = net_generic(net, nfs_net_id);
1245 spin_lock(&nn->nfs_client_lock);
1246 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
1247 if (nfs4_cb_match_client(addr, clp, 1) == false)
1250 if (!nfs4_has_session(clp))
1253 /* Match sessionid*/
1254 if (memcmp(clp->cl_session->sess_id.data,
1255 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
1258 atomic_inc(&clp->cl_count);
1259 spin_unlock(&nn->nfs_client_lock);
1262 spin_unlock(&nn->nfs_client_lock);
1266 #else /* CONFIG_NFS_V4_1 */
1269 nfs4_find_client_sessionid(const struct sockaddr *addr,
1270 struct nfs4_sessionid *sid)
1274 #endif /* CONFIG_NFS_V4_1 */
1277 * Initialize the NFS4 callback service
1279 static int nfs4_init_callback(struct nfs_client *clp)
1283 if (clp->rpc_ops->version == 4) {
1284 if (nfs4_has_session(clp)) {
1285 error = xprt_setup_backchannel(
1286 clp->cl_rpcclient->cl_xprt,
1287 NFS41_BC_MIN_CALLBACKS);
1292 error = nfs_callback_up(clp->cl_mvops->minor_version,
1293 clp->cl_rpcclient->cl_xprt);
1295 dprintk("%s: failed to start callback. Error = %d\n",
1299 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1305 * Initialize the minor version specific parts of an NFS4 client record
1307 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1309 #if defined(CONFIG_NFS_V4_1)
1310 if (clp->cl_mvops->minor_version) {
1311 struct nfs4_session *session = NULL;
1313 * Create the session and mark it expired.
1314 * When a SEQUENCE operation encounters the expired session
1315 * it will do session recovery to initialize it.
1317 session = nfs4_alloc_session(clp);
1321 clp->cl_session = session;
1323 * The create session reply races with the server back
1324 * channel probe. Mark the client NFS_CS_SESSION_INITING
1325 * so that the client back channel can find the
1328 clp->cl_cons_state = NFS_CS_SESSION_INITING;
1330 #endif /* CONFIG_NFS_V4_1 */
1332 return nfs4_init_callback(clp);
1336 * Initialise an NFS4 client record
1338 int nfs4_init_client(struct nfs_client *clp,
1339 const struct rpc_timeout *timeparms,
1340 const char *ip_addr,
1341 rpc_authflavor_t authflavour,
1346 if (clp->cl_cons_state == NFS_CS_READY) {
1347 /* the client is initialised already */
1348 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1352 /* Check NFS protocol revision and initialize RPC op vector */
1353 clp->rpc_ops = &nfs_v4_clientops;
1355 error = nfs_create_rpc_client(clp, timeparms, authflavour,
1359 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1361 error = nfs_idmap_new(clp);
1363 dprintk("%s: failed to create idmapper. Error = %d\n",
1367 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1369 error = nfs4_init_client_minor_version(clp);
1373 if (!nfs4_has_session(clp))
1374 nfs_mark_client_ready(clp, NFS_CS_READY);
1378 nfs_mark_client_ready(clp, error);
1379 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1384 * Set up an NFS4 client
1386 static int nfs4_set_client(struct nfs_server *server,
1387 const char *hostname,
1388 const struct sockaddr *addr,
1389 const size_t addrlen,
1390 const char *ip_addr,
1391 rpc_authflavor_t authflavour,
1392 int proto, const struct rpc_timeout *timeparms,
1393 u32 minorversion, struct net *net)
1395 struct nfs_client_initdata cl_init = {
1396 .hostname = hostname,
1399 .rpc_ops = &nfs_v4_clientops,
1401 .minorversion = minorversion,
1404 struct nfs_client *clp;
1407 dprintk("--> nfs4_set_client()\n");
1409 /* Allocate or find a client reference we can use */
1410 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour,
1411 server->flags & NFS_MOUNT_NORESVPORT);
1413 error = PTR_ERR(clp);
1418 * Query for the lease time on clientid setup or renewal
1420 * Note that this will be set on nfs_clients that were created
1421 * only for the DS role and did not set this bit, but now will
1422 * serve a dual role.
1424 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1426 server->nfs_client = clp;
1427 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1430 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1435 * Set up a pNFS Data Server client.
1437 * Return any existing nfs_client that matches server address,port,version
1440 * For a new nfs_client, use a soft mount (default), a low retrans and a
1441 * low timeout interval so that if a connection is lost, we retry through
1444 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1445 const struct sockaddr *ds_addr,
1446 int ds_addrlen, int ds_proto)
1448 struct nfs_client_initdata cl_init = {
1450 .addrlen = ds_addrlen,
1451 .rpc_ops = &nfs_v4_clientops,
1453 .minorversion = mds_clp->cl_minorversion,
1454 .net = mds_clp->net,
1456 struct rpc_timeout ds_timeout = {
1457 .to_initval = 15 * HZ,
1458 .to_maxval = 15 * HZ,
1460 .to_exponential = 1,
1462 struct nfs_client *clp;
1465 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1466 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1467 * (section 13.1 RFC 5661).
1469 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1470 mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
1472 dprintk("<-- %s %p\n", __func__, clp);
1475 EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
1478 * Session has been established, and the client marked ready.
1479 * Set the mount rsize and wsize with negotiated fore channel
1480 * attributes which will be bound checked in nfs_server_set_fsinfo.
1482 static void nfs4_session_set_rwsize(struct nfs_server *server)
1484 #ifdef CONFIG_NFS_V4_1
1485 struct nfs4_session *sess;
1489 if (!nfs4_has_session(server->nfs_client))
1491 sess = server->nfs_client->cl_session;
1492 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1493 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1495 if (server->rsize > server_resp_sz)
1496 server->rsize = server_resp_sz;
1497 if (server->wsize > server_rqst_sz)
1498 server->wsize = server_rqst_sz;
1499 #endif /* CONFIG_NFS_V4_1 */
1502 static int nfs4_server_common_setup(struct nfs_server *server,
1503 struct nfs_fh *mntfh)
1505 struct nfs_fattr *fattr;
1508 BUG_ON(!server->nfs_client);
1509 BUG_ON(!server->nfs_client->rpc_ops);
1510 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1512 /* data servers support only a subset of NFSv4.1 */
1513 if (is_ds_only_client(server->nfs_client))
1514 return -EPROTONOSUPPORT;
1516 fattr = nfs_alloc_fattr();
1520 /* We must ensure the session is initialised first */
1521 error = nfs4_init_session(server);
1525 /* Probe the root fh to retrieve its FSID and filehandle */
1526 error = nfs4_get_rootfh(server, mntfh);
1530 dprintk("Server FSID: %llx:%llx\n",
1531 (unsigned long long) server->fsid.major,
1532 (unsigned long long) server->fsid.minor);
1533 dprintk("Mount FH: %d\n", mntfh->size);
1535 nfs4_session_set_rwsize(server);
1537 error = nfs_probe_fsinfo(server, mntfh, fattr);
1541 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1542 server->namelen = NFS4_MAXNAMLEN;
1544 nfs_server_insert_lists(server);
1545 server->mount_time = jiffies;
1546 server->destroy = nfs4_destroy_server;
1548 nfs_free_fattr(fattr);
1553 * Create a version 4 volume record
1555 static int nfs4_init_server(struct nfs_server *server,
1556 const struct nfs_parsed_mount_data *data)
1558 struct rpc_timeout timeparms;
1561 dprintk("--> nfs4_init_server()\n");
1563 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1564 data->timeo, data->retrans);
1566 /* Initialise the client representation from the mount data */
1567 server->flags = data->flags;
1568 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1569 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1570 server->caps |= NFS_CAP_READDIRPLUS;
1571 server->options = data->options;
1573 /* Get a client record */
1574 error = nfs4_set_client(server,
1575 data->nfs_server.hostname,
1576 (const struct sockaddr *)&data->nfs_server.address,
1577 data->nfs_server.addrlen,
1578 data->client_address,
1579 data->auth_flavors[0],
1580 data->nfs_server.protocol,
1588 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1591 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1592 server->caps |= NFS_CAP_UIDGID_NOMAP;
1595 server->rsize = nfs_block_size(data->rsize, NULL);
1597 server->wsize = nfs_block_size(data->wsize, NULL);
1599 server->acregmin = data->acregmin * HZ;
1600 server->acregmax = data->acregmax * HZ;
1601 server->acdirmin = data->acdirmin * HZ;
1602 server->acdirmax = data->acdirmax * HZ;
1604 server->port = data->nfs_server.port;
1606 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1610 dprintk("<-- nfs4_init_server() = %d\n", error);
1615 * Create a version 4 volume record
1616 * - keyed on server and FSID
1618 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1619 struct nfs_fh *mntfh)
1621 struct nfs_server *server;
1624 dprintk("--> nfs4_create_server()\n");
1626 server = nfs_alloc_server();
1628 return ERR_PTR(-ENOMEM);
1630 /* set up the general RPC client */
1631 error = nfs4_init_server(server, data);
1635 error = nfs4_server_common_setup(server, mntfh);
1639 dprintk("<-- nfs4_create_server() = %p\n", server);
1643 nfs_free_server(server);
1644 dprintk("<-- nfs4_create_server() = error %d\n", error);
1645 return ERR_PTR(error);
1649 * Create an NFS4 referral server record
1651 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1652 struct nfs_fh *mntfh)
1654 struct nfs_client *parent_client;
1655 struct nfs_server *server, *parent_server;
1658 dprintk("--> nfs4_create_referral_server()\n");
1660 server = nfs_alloc_server();
1662 return ERR_PTR(-ENOMEM);
1664 parent_server = NFS_SB(data->sb);
1665 parent_client = parent_server->nfs_client;
1667 /* Initialise the client representation from the parent server */
1668 nfs_server_copy_userdata(server, parent_server);
1669 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
1671 /* Get a client representation.
1672 * Note: NFSv4 always uses TCP, */
1673 error = nfs4_set_client(server, data->hostname,
1676 parent_client->cl_ipaddr,
1678 parent_server->client->cl_xprt->prot,
1679 parent_server->client->cl_timeout,
1680 parent_client->cl_mvops->minor_version,
1681 parent_client->net);
1685 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1689 error = nfs4_server_common_setup(server, mntfh);
1693 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1697 nfs_free_server(server);
1698 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1699 return ERR_PTR(error);
1702 #endif /* CONFIG_NFS_V4 */
1705 * Clone an NFS2, NFS3 or NFS4 server record
1707 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1709 struct nfs_fattr *fattr)
1711 struct nfs_server *server;
1712 struct nfs_fattr *fattr_fsinfo;
1715 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1716 (unsigned long long) fattr->fsid.major,
1717 (unsigned long long) fattr->fsid.minor);
1719 server = nfs_alloc_server();
1721 return ERR_PTR(-ENOMEM);
1724 fattr_fsinfo = nfs_alloc_fattr();
1725 if (fattr_fsinfo == NULL)
1726 goto out_free_server;
1728 /* Copy data from the source */
1729 server->nfs_client = source->nfs_client;
1730 server->destroy = source->destroy;
1731 atomic_inc(&server->nfs_client->cl_count);
1732 nfs_server_copy_userdata(server, source);
1734 server->fsid = fattr->fsid;
1736 error = nfs_init_server_rpcclient(server,
1737 source->client->cl_timeout,
1738 source->client->cl_auth->au_flavor);
1740 goto out_free_server;
1741 if (!IS_ERR(source->client_acl))
1742 nfs_init_server_aclclient(server);
1744 /* probe the filesystem info for this server filesystem */
1745 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1747 goto out_free_server;
1749 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1750 server->namelen = NFS4_MAXNAMLEN;
1752 dprintk("Cloned FSID: %llx:%llx\n",
1753 (unsigned long long) server->fsid.major,
1754 (unsigned long long) server->fsid.minor);
1756 error = nfs_start_lockd(server);
1758 goto out_free_server;
1760 nfs_server_insert_lists(server);
1761 server->mount_time = jiffies;
1763 nfs_free_fattr(fattr_fsinfo);
1764 dprintk("<-- nfs_clone_server() = %p\n", server);
1768 nfs_free_fattr(fattr_fsinfo);
1769 nfs_free_server(server);
1770 dprintk("<-- nfs_clone_server() = error %d\n", error);
1771 return ERR_PTR(error);
1774 void nfs_clients_init(struct net *net)
1776 struct nfs_net *nn = net_generic(net, nfs_net_id);
1778 INIT_LIST_HEAD(&nn->nfs_client_list);
1779 INIT_LIST_HEAD(&nn->nfs_volume_list);
1780 #ifdef CONFIG_NFS_V4
1781 idr_init(&nn->cb_ident_idr);
1783 spin_lock_init(&nn->nfs_client_lock);
1786 #ifdef CONFIG_PROC_FS
1787 static struct proc_dir_entry *proc_fs_nfs;
1789 static int nfs_server_list_open(struct inode *inode, struct file *file);
1790 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1791 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1792 static void nfs_server_list_stop(struct seq_file *p, void *v);
1793 static int nfs_server_list_show(struct seq_file *m, void *v);
1795 static const struct seq_operations nfs_server_list_ops = {
1796 .start = nfs_server_list_start,
1797 .next = nfs_server_list_next,
1798 .stop = nfs_server_list_stop,
1799 .show = nfs_server_list_show,
1802 static const struct file_operations nfs_server_list_fops = {
1803 .open = nfs_server_list_open,
1805 .llseek = seq_lseek,
1806 .release = seq_release,
1807 .owner = THIS_MODULE,
1810 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1811 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1812 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1813 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1814 static int nfs_volume_list_show(struct seq_file *m, void *v);
1816 static const struct seq_operations nfs_volume_list_ops = {
1817 .start = nfs_volume_list_start,
1818 .next = nfs_volume_list_next,
1819 .stop = nfs_volume_list_stop,
1820 .show = nfs_volume_list_show,
1823 static const struct file_operations nfs_volume_list_fops = {
1824 .open = nfs_volume_list_open,
1826 .llseek = seq_lseek,
1827 .release = seq_release,
1828 .owner = THIS_MODULE,
1832 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1835 static int nfs_server_list_open(struct inode *inode, struct file *file)
1839 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1840 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1842 ret = seq_open(file, &nfs_server_list_ops);
1846 m = file->private_data;
1853 * set up the iterator to start reading from the server list and return the first item
1855 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1857 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1859 /* lock the list against modification */
1860 spin_lock(&nn->nfs_client_lock);
1861 return seq_list_start_head(&nn->nfs_client_list, *_pos);
1865 * move to next server
1867 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1869 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1871 return seq_list_next(v, &nn->nfs_client_list, pos);
1875 * clean up after reading from the transports list
1877 static void nfs_server_list_stop(struct seq_file *p, void *v)
1879 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1881 spin_unlock(&nn->nfs_client_lock);
1885 * display a header line followed by a load of call lines
1887 static int nfs_server_list_show(struct seq_file *m, void *v)
1889 struct nfs_client *clp;
1890 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1892 /* display header on line 1 */
1893 if (v == &nn->nfs_client_list) {
1894 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1898 /* display one transport per line on subsequent lines */
1899 clp = list_entry(v, struct nfs_client, cl_share_link);
1901 /* Check if the client is initialized */
1902 if (clp->cl_cons_state != NFS_CS_READY)
1905 seq_printf(m, "v%u %s %s %3d %s\n",
1906 clp->rpc_ops->version,
1907 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1908 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1909 atomic_read(&clp->cl_count),
1916 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1918 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1922 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1923 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1925 ret = seq_open(file, &nfs_volume_list_ops);
1929 m = file->private_data;
1936 * set up the iterator to start reading from the volume list and return the first item
1938 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1940 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1942 /* lock the list against modification */
1943 spin_lock(&nn->nfs_client_lock);
1944 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
1948 * move to next volume
1950 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1952 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1954 return seq_list_next(v, &nn->nfs_volume_list, pos);
1958 * clean up after reading from the transports list
1960 static void nfs_volume_list_stop(struct seq_file *p, void *v)
1962 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1964 spin_unlock(&nn->nfs_client_lock);
1968 * display a header line followed by a load of call lines
1970 static int nfs_volume_list_show(struct seq_file *m, void *v)
1972 struct nfs_server *server;
1973 struct nfs_client *clp;
1974 char dev[8], fsid[17];
1975 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1977 /* display header on line 1 */
1978 if (v == &nn->nfs_volume_list) {
1979 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
1982 /* display one transport per line on subsequent lines */
1983 server = list_entry(v, struct nfs_server, master_link);
1984 clp = server->nfs_client;
1986 snprintf(dev, 8, "%u:%u",
1987 MAJOR(server->s_dev), MINOR(server->s_dev));
1989 snprintf(fsid, 17, "%llx:%llx",
1990 (unsigned long long) server->fsid.major,
1991 (unsigned long long) server->fsid.minor);
1993 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
1994 clp->rpc_ops->version,
1995 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1996 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1999 nfs_server_fscache_state(server));
2005 * initialise the /proc/fs/nfsfs/ directory
2007 int __init nfs_fs_proc_init(void)
2009 struct proc_dir_entry *p;
2011 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
2015 /* a file of servers with which we're dealing */
2016 p = proc_create("servers", S_IFREG|S_IRUGO,
2017 proc_fs_nfs, &nfs_server_list_fops);
2021 /* a file of volumes that we have mounted */
2022 p = proc_create("volumes", S_IFREG|S_IRUGO,
2023 proc_fs_nfs, &nfs_volume_list_fops);
2029 remove_proc_entry("servers", proc_fs_nfs);
2031 remove_proc_entry("fs/nfsfs", NULL);
2037 * clean up the /proc/fs/nfsfs/ directory
2039 void nfs_fs_proc_exit(void)
2041 remove_proc_entry("volumes", proc_fs_nfs);
2042 remove_proc_entry("servers", proc_fs_nfs);
2043 remove_proc_entry("fs/nfsfs", NULL);
2046 #endif /* CONFIG_PROC_FS */
2048 module_param(nfs4_disable_idmapping, bool, 0644);
2049 MODULE_PARM_DESC(nfs4_disable_idmapping,
2050 "Turn off NFSv4 idmapping when using 'sec=sys'");