1 /* client.c: NFS client sharing and management code
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include <linux/time.h>
17 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/stat.h>
21 #include <linux/errno.h>
22 #include <linux/unistd.h>
23 #include <linux/sunrpc/clnt.h>
24 #include <linux/sunrpc/stats.h>
25 #include <linux/sunrpc/metrics.h>
26 #include <linux/sunrpc/xprtsock.h>
27 #include <linux/sunrpc/xprtrdma.h>
28 #include <linux/nfs_fs.h>
29 #include <linux/nfs_mount.h>
30 #include <linux/nfs4_mount.h>
31 #include <linux/lockd/bind.h>
32 #include <linux/seq_file.h>
33 #include <linux/mount.h>
34 #include <linux/nfs_idmap.h>
35 #include <linux/vfs.h>
36 #include <linux/inet.h>
37 #include <linux/in6.h>
38 #include <linux/slab.h>
39 #include <linux/idr.h>
41 #include <linux/nfs_xdr.h>
42 #include <linux/sunrpc/bc_xprt.h>
43 #include <linux/nsproxy.h>
44 #include <linux/pid_namespace.h>
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->cl_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] = {
104 const struct rpc_program nfs_program = {
106 .number = NFS_PROGRAM,
107 .nrvers = ARRAY_SIZE(nfs_version),
108 .version = nfs_version,
109 .stats = &nfs_rpcstat,
110 .pipe_dir_name = NFS_PIPE_DIRNAME,
113 struct rpc_stat nfs_rpcstat = {
114 .program = &nfs_program
118 #ifdef CONFIG_NFS_V3_ACL
119 static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
120 static const struct rpc_version *nfsacl_version[] = {
121 [3] = &nfsacl_version3,
124 const struct rpc_program nfsacl_program = {
126 .number = NFS_ACL_PROGRAM,
127 .nrvers = ARRAY_SIZE(nfsacl_version),
128 .version = nfsacl_version,
129 .stats = &nfsacl_rpcstat,
131 #endif /* CONFIG_NFS_V3_ACL */
133 struct nfs_client_initdata {
134 unsigned long init_flags;
135 const char *hostname;
136 const struct sockaddr *addr;
138 const struct nfs_rpc_ops *rpc_ops;
145 * Allocate a shared client record
147 * Since these are allocated/deallocated very rarely, we don't
148 * bother putting them in a slab cache...
150 static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
152 struct nfs_client *clp;
153 struct rpc_cred *cred;
156 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
159 clp->rpc_ops = cl_init->rpc_ops;
161 atomic_set(&clp->cl_count, 1);
162 clp->cl_cons_state = NFS_CS_INITING;
164 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
165 clp->cl_addrlen = cl_init->addrlen;
167 if (cl_init->hostname) {
169 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
170 if (!clp->cl_hostname)
174 INIT_LIST_HEAD(&clp->cl_superblocks);
175 clp->cl_rpcclient = ERR_PTR(-EINVAL);
177 clp->cl_proto = cl_init->proto;
178 clp->cl_net = get_net(cl_init->net);
181 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
185 spin_lock_init(&clp->cl_lock);
186 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
187 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
188 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
189 clp->cl_minorversion = cl_init->minorversion;
190 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
192 cred = rpc_lookup_machine_cred("*");
194 clp->cl_machine_cred = cred;
195 nfs_fscache_get_client_cookie(clp);
206 #ifdef CONFIG_NFS_V4_1
207 static void nfs4_shutdown_session(struct nfs_client *clp)
209 if (nfs4_has_session(clp)) {
210 nfs4_destroy_session(clp->cl_session);
211 nfs4_destroy_clientid(clp);
215 #else /* CONFIG_NFS_V4_1 */
216 static void nfs4_shutdown_session(struct nfs_client *clp)
219 #endif /* CONFIG_NFS_V4_1 */
222 * Destroy the NFS4 callback service
224 static void nfs4_destroy_callback(struct nfs_client *clp)
226 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
227 nfs_callback_down(clp->cl_mvops->minor_version);
230 static void nfs4_shutdown_client(struct nfs_client *clp)
232 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
233 nfs4_kill_renewd(clp);
234 nfs4_shutdown_session(clp);
235 nfs4_destroy_callback(clp);
236 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
237 nfs_idmap_delete(clp);
239 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
240 kfree(clp->cl_serverowner);
241 kfree(clp->cl_serverscope);
242 kfree(clp->cl_implid);
245 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
246 void nfs_cleanup_cb_ident_idr(struct net *net)
248 struct nfs_net *nn = net_generic(net, nfs_net_id);
250 idr_destroy(&nn->cb_ident_idr);
253 /* nfs_client_lock held */
254 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
256 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
258 if (clp->cl_cb_ident)
259 idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
262 static void pnfs_init_server(struct nfs_server *server)
264 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
267 static void nfs4_destroy_server(struct nfs_server *server)
269 nfs4_purge_state_owners(server);
273 static void nfs4_shutdown_client(struct nfs_client *clp)
277 void nfs_cleanup_cb_ident_idr(struct net *net)
281 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
285 static void pnfs_init_server(struct nfs_server *server)
289 #endif /* CONFIG_NFS_V4 */
292 * Destroy a shared client record
294 static void nfs_free_client(struct nfs_client *clp)
296 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
298 nfs4_shutdown_client(clp);
300 nfs_fscache_release_client_cookie(clp);
302 /* -EIO all pending I/O */
303 if (!IS_ERR(clp->cl_rpcclient))
304 rpc_shutdown_client(clp->cl_rpcclient);
306 if (clp->cl_machine_cred != NULL)
307 put_rpccred(clp->cl_machine_cred);
309 put_net(clp->cl_net);
310 kfree(clp->cl_hostname);
313 dprintk("<-- nfs_free_client()\n");
317 * Release a reference to a shared client record
319 void nfs_put_client(struct nfs_client *clp)
326 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
327 nn = net_generic(clp->cl_net, nfs_net_id);
329 if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
330 list_del(&clp->cl_share_link);
331 nfs_cb_idr_remove_locked(clp);
332 spin_unlock(&nn->nfs_client_lock);
334 BUG_ON(!list_empty(&clp->cl_superblocks));
336 nfs_free_client(clp);
339 EXPORT_SYMBOL_GPL(nfs_put_client);
341 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
343 * Test if two ip6 socket addresses refer to the same socket by
344 * comparing relevant fields. The padding bytes specifically, are not
345 * compared. sin6_flowinfo is not compared because it only affects QoS
346 * and sin6_scope_id is only compared if the address is "link local"
347 * because "link local" addresses need only be unique to a specific
348 * link. Conversely, ordinary unicast addresses might have different
351 * The caller should ensure both socket addresses are AF_INET6.
353 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
354 const struct sockaddr *sa2)
356 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
357 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
359 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
361 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
362 return sin1->sin6_scope_id == sin2->sin6_scope_id;
366 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
367 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
368 const struct sockaddr *sa2)
375 * Test if two ip4 socket addresses refer to the same socket, by
376 * comparing relevant fields. The padding bytes specifically, are
379 * The caller should ensure both socket addresses are AF_INET.
381 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
382 const struct sockaddr *sa2)
384 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
385 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
387 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
390 static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
391 const struct sockaddr *sa2)
393 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
394 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
396 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
397 (sin1->sin6_port == sin2->sin6_port);
400 static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
401 const struct sockaddr *sa2)
403 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
404 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
406 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
407 (sin1->sin_port == sin2->sin_port);
410 #if defined(CONFIG_NFS_V4_1)
412 * Test if two socket addresses represent the same actual socket,
413 * by comparing (only) relevant fields, excluding the port number.
415 static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
416 const struct sockaddr *sa2)
418 if (sa1->sa_family != sa2->sa_family)
421 switch (sa1->sa_family) {
423 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
425 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
429 #endif /* CONFIG_NFS_V4_1 */
432 * Test if two socket addresses represent the same actual socket,
433 * by comparing (only) relevant fields, including the port number.
435 static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
436 const struct sockaddr *sa2)
438 if (sa1->sa_family != sa2->sa_family)
441 switch (sa1->sa_family) {
443 return nfs_sockaddr_cmp_ip4(sa1, sa2);
445 return nfs_sockaddr_cmp_ip6(sa1, sa2);
450 #if defined(CONFIG_NFS_V4_1)
451 /* Common match routine for v4.0 and v4.1 callback services */
452 static bool nfs4_cb_match_client(const struct sockaddr *addr,
453 struct nfs_client *clp, u32 minorversion)
455 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
457 /* Don't match clients that failed to initialise */
458 if (!(clp->cl_cons_state == NFS_CS_READY ||
459 clp->cl_cons_state == NFS_CS_SESSION_INITING))
464 /* Match the version and minorversion */
465 if (clp->rpc_ops->version != 4 ||
466 clp->cl_minorversion != minorversion)
469 /* Match only the IP address, not the port number */
470 if (!nfs_sockaddr_match_ipaddr(addr, clap))
475 #endif /* CONFIG_NFS_V4_1 */
478 * Find an nfs_client on the list that matches the initialisation data
481 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
483 struct nfs_client *clp;
484 const struct sockaddr *sap = data->addr;
485 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
487 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
488 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
489 /* Don't match clients that failed to initialise properly */
490 if (clp->cl_cons_state < 0)
493 /* Different NFS versions cannot share the same nfs_client */
494 if (clp->rpc_ops != data->rpc_ops)
497 if (clp->cl_proto != data->proto)
499 /* Match nfsv4 minorversion */
500 if (clp->cl_minorversion != data->minorversion)
502 /* Match the full socket address */
503 if (!nfs_sockaddr_cmp(sap, clap))
506 atomic_inc(&clp->cl_count);
512 static bool nfs_client_init_is_complete(const struct nfs_client *clp)
514 return clp->cl_cons_state != NFS_CS_INITING;
517 int nfs_wait_client_init_complete(const struct nfs_client *clp)
519 return wait_event_killable(nfs_client_active_wq,
520 nfs_client_init_is_complete(clp));
524 * Found an existing client. Make sure it's ready before returning.
526 static struct nfs_client *
527 nfs_found_client(const struct nfs_client_initdata *cl_init,
528 struct nfs_client *clp)
532 error = nfs_wait_client_init_complete(clp);
535 return ERR_PTR(-ERESTARTSYS);
538 if (clp->cl_cons_state < NFS_CS_READY) {
539 error = clp->cl_cons_state;
541 return ERR_PTR(error);
546 dprintk("<-- %s found nfs_client %p for %s\n",
547 __func__, clp, cl_init->hostname ?: "");
552 * Look up a client by IP address and protocol version
553 * - creates a new record if one doesn't yet exist
555 static struct nfs_client *
556 nfs_get_client(const struct nfs_client_initdata *cl_init,
557 const struct rpc_timeout *timeparms,
559 rpc_authflavor_t authflavour)
561 struct nfs_client *clp, *new = NULL;
562 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
564 dprintk("--> nfs_get_client(%s,v%u)\n",
565 cl_init->hostname ?: "", cl_init->rpc_ops->version);
567 /* see if the client already exists */
569 spin_lock(&nn->nfs_client_lock);
571 clp = nfs_match_client(cl_init);
573 spin_unlock(&nn->nfs_client_lock);
575 nfs_free_client(new);
576 return nfs_found_client(cl_init, clp);
579 list_add(&new->cl_share_link, &nn->nfs_client_list);
580 spin_unlock(&nn->nfs_client_lock);
581 new->cl_flags = cl_init->init_flags;
582 return cl_init->rpc_ops->init_client(new,
587 spin_unlock(&nn->nfs_client_lock);
589 new = nfs_alloc_client(cl_init);
590 } while (!IS_ERR(new));
592 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
593 cl_init->hostname ?: "", PTR_ERR(new));
598 * Mark a server as ready or failed
600 void nfs_mark_client_ready(struct nfs_client *clp, int state)
603 clp->cl_cons_state = state;
604 wake_up_all(&nfs_client_active_wq);
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)
655 struct rpc_clnt *clnt = NULL;
656 struct rpc_create_args args = {
658 .protocol = clp->cl_proto,
659 .address = (struct sockaddr *)&clp->cl_addr,
660 .addrsize = clp->cl_addrlen,
661 .timeout = timeparms,
662 .servername = clp->cl_hostname,
663 .program = &nfs_program,
664 .version = clp->rpc_ops->version,
665 .authflavor = flavor,
668 if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
669 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
670 if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags))
671 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
673 if (!IS_ERR(clp->cl_rpcclient))
676 clnt = rpc_create(&args);
678 dprintk("%s: cannot create RPC client. Error = %ld\n",
679 __func__, PTR_ERR(clnt));
680 return PTR_ERR(clnt);
683 clp->cl_rpcclient = clnt;
688 * Version 2 or 3 client destruction
690 static void nfs_destroy_server(struct nfs_server *server)
692 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
693 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
694 nlmclnt_done(server->nlm_host);
698 * Version 2 or 3 lockd setup
700 static int nfs_start_lockd(struct nfs_server *server)
702 struct nlm_host *host;
703 struct nfs_client *clp = server->nfs_client;
704 struct nlmclnt_initdata nlm_init = {
705 .hostname = clp->cl_hostname,
706 .address = (struct sockaddr *)&clp->cl_addr,
707 .addrlen = clp->cl_addrlen,
708 .nfs_version = clp->rpc_ops->version,
709 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
714 if (nlm_init.nfs_version > 3)
716 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
717 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
720 switch (clp->cl_proto) {
722 nlm_init.protocol = IPPROTO_TCP;
724 case XPRT_TRANSPORT_UDP:
725 nlm_init.protocol = IPPROTO_UDP;
728 host = nlmclnt_init(&nlm_init);
730 return PTR_ERR(host);
732 server->nlm_host = host;
733 server->destroy = nfs_destroy_server;
738 * Initialise an NFSv3 ACL client connection
740 #ifdef CONFIG_NFS_V3_ACL
741 static void nfs_init_server_aclclient(struct nfs_server *server)
743 if (server->nfs_client->rpc_ops->version != 3)
745 if (server->flags & NFS_MOUNT_NOACL)
748 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
749 if (IS_ERR(server->client_acl))
752 /* No errors! Assume that Sun nfsacls are supported */
753 server->caps |= NFS_CAP_ACLS;
757 server->caps &= ~NFS_CAP_ACLS;
760 static inline void nfs_init_server_aclclient(struct nfs_server *server)
762 server->flags &= ~NFS_MOUNT_NOACL;
763 server->caps &= ~NFS_CAP_ACLS;
768 * Create a general RPC client
770 static int nfs_init_server_rpcclient(struct nfs_server *server,
771 const struct rpc_timeout *timeo,
772 rpc_authflavor_t pseudoflavour)
774 struct nfs_client *clp = server->nfs_client;
776 server->client = rpc_clone_client(clp->cl_rpcclient);
777 if (IS_ERR(server->client)) {
778 dprintk("%s: couldn't create rpc_client!\n", __func__);
779 return PTR_ERR(server->client);
782 memcpy(&server->client->cl_timeout_default,
784 sizeof(server->client->cl_timeout_default));
785 server->client->cl_timeout = &server->client->cl_timeout_default;
787 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
788 struct rpc_auth *auth;
790 auth = rpcauth_create(pseudoflavour, server->client);
792 dprintk("%s: couldn't create credcache!\n", __func__);
793 return PTR_ERR(auth);
796 server->client->cl_softrtry = 0;
797 if (server->flags & NFS_MOUNT_SOFT)
798 server->client->cl_softrtry = 1;
804 * nfs_init_client - Initialise an NFS2 or NFS3 client
806 * @clp: nfs_client to initialise
807 * @timeparms: timeout parameters for underlying RPC transport
808 * @ip_addr: IP presentation address (not used)
809 * @authflavor: authentication flavor for underlying RPC transport
811 * Returns pointer to an NFS client, or an ERR_PTR value.
813 struct nfs_client *nfs_init_client(struct nfs_client *clp,
814 const struct rpc_timeout *timeparms,
815 const char *ip_addr, rpc_authflavor_t authflavour)
819 if (clp->cl_cons_state == NFS_CS_READY) {
820 /* the client is already initialised */
821 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
826 * Create a client RPC handle for doing FSSTAT with UNIX auth only
827 * - RFC 2623, sec 2.3.2
829 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
832 nfs_mark_client_ready(clp, NFS_CS_READY);
836 nfs_mark_client_ready(clp, error);
838 dprintk("<-- nfs_init_client() = xerror %d\n", error);
839 return ERR_PTR(error);
843 * Create a version 2 or 3 client
845 static int nfs_init_server(struct nfs_server *server,
846 const struct nfs_parsed_mount_data *data)
848 struct nfs_client_initdata cl_init = {
849 .hostname = data->nfs_server.hostname,
850 .addr = (const struct sockaddr *)&data->nfs_server.address,
851 .addrlen = data->nfs_server.addrlen,
853 .proto = data->nfs_server.protocol,
856 struct rpc_timeout timeparms;
857 struct nfs_client *clp;
860 dprintk("--> nfs_init_server()\n");
862 switch (data->version) {
865 cl_init.rpc_ops = &nfs_v2_clientops;
870 cl_init.rpc_ops = &nfs_v3_clientops;
874 return -EPROTONOSUPPORT;
877 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
878 data->timeo, data->retrans);
879 if (data->flags & NFS_MOUNT_NORESVPORT)
880 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
882 /* Allocate or find a client reference we can use */
883 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX);
885 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
889 server->nfs_client = clp;
891 /* Initialise the client representation from the mount data */
892 server->flags = data->flags;
893 server->options = data->options;
894 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
895 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
896 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR;
899 server->rsize = nfs_block_size(data->rsize, NULL);
901 server->wsize = nfs_block_size(data->wsize, NULL);
903 server->acregmin = data->acregmin * HZ;
904 server->acregmax = data->acregmax * HZ;
905 server->acdirmin = data->acdirmin * HZ;
906 server->acdirmax = data->acdirmax * HZ;
908 /* Start lockd here, before we might error out */
909 error = nfs_start_lockd(server);
913 server->port = data->nfs_server.port;
915 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
919 /* Preserve the values of mount_server-related mount options */
920 if (data->mount_server.addrlen) {
921 memcpy(&server->mountd_address, &data->mount_server.address,
922 data->mount_server.addrlen);
923 server->mountd_addrlen = data->mount_server.addrlen;
925 server->mountd_version = data->mount_server.version;
926 server->mountd_port = data->mount_server.port;
927 server->mountd_protocol = data->mount_server.protocol;
929 server->namelen = data->namlen;
930 /* Create a client RPC handle for the NFSv3 ACL management interface */
931 nfs_init_server_aclclient(server);
932 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
936 server->nfs_client = NULL;
938 dprintk("<-- nfs_init_server() = xerror %d\n", error);
943 * Load up the server record from information gained in an fsinfo record
945 static void nfs_server_set_fsinfo(struct nfs_server *server,
946 struct nfs_fh *mntfh,
947 struct nfs_fsinfo *fsinfo)
949 unsigned long max_rpc_payload;
951 /* Work out a lot of parameters */
952 if (server->rsize == 0)
953 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
954 if (server->wsize == 0)
955 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
957 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
958 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
959 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
960 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
962 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
963 if (server->rsize > max_rpc_payload)
964 server->rsize = max_rpc_payload;
965 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
966 server->rsize = NFS_MAX_FILE_IO_SIZE;
967 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
969 server->backing_dev_info.name = "nfs";
970 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
972 if (server->wsize > max_rpc_payload)
973 server->wsize = max_rpc_payload;
974 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
975 server->wsize = NFS_MAX_FILE_IO_SIZE;
976 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
977 server->pnfs_blksize = fsinfo->blksize;
979 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
981 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
982 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
983 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
984 if (server->dtsize > server->rsize)
985 server->dtsize = server->rsize;
987 if (server->flags & NFS_MOUNT_NOAC) {
988 server->acregmin = server->acregmax = 0;
989 server->acdirmin = server->acdirmax = 0;
992 server->maxfilesize = fsinfo->maxfilesize;
994 server->time_delta = fsinfo->time_delta;
996 /* We're airborne Set socket buffersize */
997 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
1001 * Probe filesystem information, including the FSID on v2/v3
1003 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
1005 struct nfs_fsinfo fsinfo;
1006 struct nfs_client *clp = server->nfs_client;
1009 dprintk("--> nfs_probe_fsinfo()\n");
1011 if (clp->rpc_ops->set_capabilities != NULL) {
1012 error = clp->rpc_ops->set_capabilities(server, mntfh);
1017 fsinfo.fattr = fattr;
1018 fsinfo.layouttype = 0;
1019 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
1023 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
1025 /* Get some general file system info */
1026 if (server->namelen == 0) {
1027 struct nfs_pathconf pathinfo;
1029 pathinfo.fattr = fattr;
1030 nfs_fattr_init(fattr);
1032 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
1033 server->namelen = pathinfo.max_namelen;
1036 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1040 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1045 * Copy useful information when duplicating a server record
1047 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1049 target->flags = source->flags;
1050 target->rsize = source->rsize;
1051 target->wsize = source->wsize;
1052 target->acregmin = source->acregmin;
1053 target->acregmax = source->acregmax;
1054 target->acdirmin = source->acdirmin;
1055 target->acdirmax = source->acdirmax;
1056 target->caps = source->caps;
1057 target->options = source->options;
1060 static void nfs_server_insert_lists(struct nfs_server *server)
1062 struct nfs_client *clp = server->nfs_client;
1063 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1065 spin_lock(&nn->nfs_client_lock);
1066 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
1067 list_add_tail(&server->master_link, &nn->nfs_volume_list);
1068 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1069 spin_unlock(&nn->nfs_client_lock);
1073 static void nfs_server_remove_lists(struct nfs_server *server)
1075 struct nfs_client *clp = server->nfs_client;
1080 nn = net_generic(clp->cl_net, nfs_net_id);
1081 spin_lock(&nn->nfs_client_lock);
1082 list_del_rcu(&server->client_link);
1083 if (list_empty(&clp->cl_superblocks))
1084 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1085 list_del(&server->master_link);
1086 spin_unlock(&nn->nfs_client_lock);
1092 * Allocate and initialise a server record
1094 static struct nfs_server *nfs_alloc_server(void)
1096 struct nfs_server *server;
1098 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1102 server->client = server->client_acl = ERR_PTR(-EINVAL);
1104 /* Zero out the NFS state stuff */
1105 INIT_LIST_HEAD(&server->client_link);
1106 INIT_LIST_HEAD(&server->master_link);
1107 INIT_LIST_HEAD(&server->delegations);
1108 INIT_LIST_HEAD(&server->layouts);
1109 INIT_LIST_HEAD(&server->state_owners_lru);
1111 atomic_set(&server->active, 0);
1113 server->io_stats = nfs_alloc_iostats();
1114 if (!server->io_stats) {
1119 if (bdi_init(&server->backing_dev_info)) {
1120 nfs_free_iostats(server->io_stats);
1125 ida_init(&server->openowner_id);
1126 ida_init(&server->lockowner_id);
1127 pnfs_init_server(server);
1133 * Free up a server record
1135 void nfs_free_server(struct nfs_server *server)
1137 dprintk("--> nfs_free_server()\n");
1139 nfs_server_remove_lists(server);
1140 unset_pnfs_layoutdriver(server);
1142 if (server->destroy != NULL)
1143 server->destroy(server);
1145 if (!IS_ERR(server->client_acl))
1146 rpc_shutdown_client(server->client_acl);
1147 if (!IS_ERR(server->client))
1148 rpc_shutdown_client(server->client);
1150 nfs_put_client(server->nfs_client);
1152 ida_destroy(&server->lockowner_id);
1153 ida_destroy(&server->openowner_id);
1154 nfs_free_iostats(server->io_stats);
1155 bdi_destroy(&server->backing_dev_info);
1157 nfs_release_automount_timer();
1158 dprintk("<-- nfs_free_server()\n");
1162 * Create a version 2 or 3 volume record
1163 * - keyed on server and FSID
1165 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1166 struct nfs_fh *mntfh)
1168 struct nfs_server *server;
1169 struct nfs_fattr *fattr;
1172 server = nfs_alloc_server();
1174 return ERR_PTR(-ENOMEM);
1177 fattr = nfs_alloc_fattr();
1181 /* Get a client representation */
1182 error = nfs_init_server(server, data);
1186 BUG_ON(!server->nfs_client);
1187 BUG_ON(!server->nfs_client->rpc_ops);
1188 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1190 /* Probe the root fh to retrieve its FSID */
1191 error = nfs_probe_fsinfo(server, mntfh, fattr);
1194 if (server->nfs_client->rpc_ops->version == 3) {
1195 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1196 server->namelen = NFS3_MAXNAMLEN;
1197 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1198 server->caps |= NFS_CAP_READDIRPLUS;
1200 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1201 server->namelen = NFS2_MAXNAMLEN;
1204 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1205 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
1207 dprintk("nfs_create_server: getattr error = %d\n", -error);
1211 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
1213 dprintk("Server FSID: %llx:%llx\n",
1214 (unsigned long long) server->fsid.major,
1215 (unsigned long long) server->fsid.minor);
1217 nfs_server_insert_lists(server);
1218 server->mount_time = jiffies;
1219 nfs_free_fattr(fattr);
1223 nfs_free_fattr(fattr);
1224 nfs_free_server(server);
1225 return ERR_PTR(error);
1228 #ifdef CONFIG_NFS_V4
1230 * NFSv4.0 callback thread helper
1232 * Find a client by callback identifier
1235 nfs4_find_client_ident(struct net *net, int cb_ident)
1237 struct nfs_client *clp;
1238 struct nfs_net *nn = net_generic(net, nfs_net_id);
1240 spin_lock(&nn->nfs_client_lock);
1241 clp = idr_find(&nn->cb_ident_idr, cb_ident);
1243 atomic_inc(&clp->cl_count);
1244 spin_unlock(&nn->nfs_client_lock);
1248 #if defined(CONFIG_NFS_V4_1)
1250 * NFSv4.1 callback thread helper
1251 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1252 * minorversion, and sessionID
1254 * Returns NULL if no such client
1257 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1258 struct nfs4_sessionid *sid)
1260 struct nfs_client *clp;
1261 struct nfs_net *nn = net_generic(net, nfs_net_id);
1263 spin_lock(&nn->nfs_client_lock);
1264 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
1265 if (nfs4_cb_match_client(addr, clp, 1) == false)
1268 if (!nfs4_has_session(clp))
1271 /* Match sessionid*/
1272 if (memcmp(clp->cl_session->sess_id.data,
1273 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
1276 atomic_inc(&clp->cl_count);
1277 spin_unlock(&nn->nfs_client_lock);
1280 spin_unlock(&nn->nfs_client_lock);
1284 #else /* CONFIG_NFS_V4_1 */
1287 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1288 struct nfs4_sessionid *sid)
1292 #endif /* CONFIG_NFS_V4_1 */
1295 * Initialize the NFS4 callback service
1297 static int nfs4_init_callback(struct nfs_client *clp)
1301 if (clp->rpc_ops->version == 4) {
1302 struct rpc_xprt *xprt;
1304 xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt);
1306 if (nfs4_has_session(clp)) {
1307 error = xprt_setup_backchannel(xprt,
1308 NFS41_BC_MIN_CALLBACKS);
1313 error = nfs_callback_up(clp->cl_mvops->minor_version, xprt);
1315 dprintk("%s: failed to start callback. Error = %d\n",
1319 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1325 * Initialize the minor version specific parts of an NFS4 client record
1327 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1329 #if defined(CONFIG_NFS_V4_1)
1330 if (clp->cl_mvops->minor_version) {
1331 struct nfs4_session *session = NULL;
1333 * Create the session and mark it expired.
1334 * When a SEQUENCE operation encounters the expired session
1335 * it will do session recovery to initialize it.
1337 session = nfs4_alloc_session(clp);
1341 clp->cl_session = session;
1343 * The create session reply races with the server back
1344 * channel probe. Mark the client NFS_CS_SESSION_INITING
1345 * so that the client back channel can find the
1348 nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING);
1350 #endif /* CONFIG_NFS_V4_1 */
1352 return nfs4_init_callback(clp);
1356 * nfs4_init_client - Initialise an NFS4 client record
1358 * @clp: nfs_client to initialise
1359 * @timeparms: timeout parameters for underlying RPC transport
1360 * @ip_addr: callback IP address in presentation format
1361 * @authflavor: authentication flavor for underlying RPC transport
1363 * Returns pointer to an NFS client, or an ERR_PTR value.
1365 struct nfs_client *nfs4_init_client(struct nfs_client *clp,
1366 const struct rpc_timeout *timeparms,
1367 const char *ip_addr,
1368 rpc_authflavor_t authflavour)
1370 char buf[INET6_ADDRSTRLEN + 1];
1373 if (clp->cl_cons_state == NFS_CS_READY) {
1374 /* the client is initialised already */
1375 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1379 /* Check NFS protocol revision and initialize RPC op vector */
1380 clp->rpc_ops = &nfs_v4_clientops;
1382 __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags);
1383 error = nfs_create_rpc_client(clp, timeparms, authflavour);
1387 /* If no clientaddr= option was specified, find a usable cb address */
1388 if (ip_addr == NULL) {
1389 struct sockaddr_storage cb_addr;
1390 struct sockaddr *sap = (struct sockaddr *)&cb_addr;
1392 error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
1395 error = rpc_ntop(sap, buf, sizeof(buf));
1398 ip_addr = (const char *)buf;
1400 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1402 error = nfs_idmap_new(clp);
1404 dprintk("%s: failed to create idmapper. Error = %d\n",
1408 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1410 error = nfs4_init_client_minor_version(clp);
1414 if (!nfs4_has_session(clp))
1415 nfs_mark_client_ready(clp, NFS_CS_READY);
1419 nfs_mark_client_ready(clp, error);
1420 nfs_put_client(clp);
1421 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1422 return ERR_PTR(error);
1426 * Set up an NFS4 client
1428 static int nfs4_set_client(struct nfs_server *server,
1429 const char *hostname,
1430 const struct sockaddr *addr,
1431 const size_t addrlen,
1432 const char *ip_addr,
1433 rpc_authflavor_t authflavour,
1434 int proto, const struct rpc_timeout *timeparms,
1435 u32 minorversion, struct net *net)
1437 struct nfs_client_initdata cl_init = {
1438 .hostname = hostname,
1441 .rpc_ops = &nfs_v4_clientops,
1443 .minorversion = minorversion,
1446 struct nfs_client *clp;
1449 dprintk("--> nfs4_set_client()\n");
1451 if (server->flags & NFS_MOUNT_NORESVPORT)
1452 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
1454 /* Allocate or find a client reference we can use */
1455 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour);
1457 error = PTR_ERR(clp);
1462 * Query for the lease time on clientid setup or renewal
1464 * Note that this will be set on nfs_clients that were created
1465 * only for the DS role and did not set this bit, but now will
1466 * serve a dual role.
1468 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1470 server->nfs_client = clp;
1471 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1474 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1479 * Set up a pNFS Data Server client.
1481 * Return any existing nfs_client that matches server address,port,version
1484 * For a new nfs_client, use a soft mount (default), a low retrans and a
1485 * low timeout interval so that if a connection is lost, we retry through
1488 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1489 const struct sockaddr *ds_addr, int ds_addrlen,
1490 int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans)
1492 struct nfs_client_initdata cl_init = {
1494 .addrlen = ds_addrlen,
1495 .rpc_ops = &nfs_v4_clientops,
1497 .minorversion = mds_clp->cl_minorversion,
1498 .net = mds_clp->cl_net,
1500 struct rpc_timeout ds_timeout;
1501 struct nfs_client *clp;
1504 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1505 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1506 * (section 13.1 RFC 5661).
1508 nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
1509 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1510 mds_clp->cl_rpcclient->cl_auth->au_flavor);
1512 dprintk("<-- %s %p\n", __func__, clp);
1515 EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
1518 * Session has been established, and the client marked ready.
1519 * Set the mount rsize and wsize with negotiated fore channel
1520 * attributes which will be bound checked in nfs_server_set_fsinfo.
1522 static void nfs4_session_set_rwsize(struct nfs_server *server)
1524 #ifdef CONFIG_NFS_V4_1
1525 struct nfs4_session *sess;
1529 if (!nfs4_has_session(server->nfs_client))
1531 sess = server->nfs_client->cl_session;
1532 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1533 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1535 if (server->rsize > server_resp_sz)
1536 server->rsize = server_resp_sz;
1537 if (server->wsize > server_rqst_sz)
1538 server->wsize = server_rqst_sz;
1539 #endif /* CONFIG_NFS_V4_1 */
1542 static int nfs4_server_common_setup(struct nfs_server *server,
1543 struct nfs_fh *mntfh)
1545 struct nfs_fattr *fattr;
1548 BUG_ON(!server->nfs_client);
1549 BUG_ON(!server->nfs_client->rpc_ops);
1550 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1552 /* data servers support only a subset of NFSv4.1 */
1553 if (is_ds_only_client(server->nfs_client))
1554 return -EPROTONOSUPPORT;
1556 fattr = nfs_alloc_fattr();
1560 /* We must ensure the session is initialised first */
1561 error = nfs4_init_session(server);
1565 /* Probe the root fh to retrieve its FSID and filehandle */
1566 error = nfs4_get_rootfh(server, mntfh);
1570 dprintk("Server FSID: %llx:%llx\n",
1571 (unsigned long long) server->fsid.major,
1572 (unsigned long long) server->fsid.minor);
1573 dprintk("Mount FH: %d\n", mntfh->size);
1575 nfs4_session_set_rwsize(server);
1577 error = nfs_probe_fsinfo(server, mntfh, fattr);
1581 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1582 server->namelen = NFS4_MAXNAMLEN;
1584 nfs_server_insert_lists(server);
1585 server->mount_time = jiffies;
1586 server->destroy = nfs4_destroy_server;
1588 nfs_free_fattr(fattr);
1593 * Create a version 4 volume record
1595 static int nfs4_init_server(struct nfs_server *server,
1596 const struct nfs_parsed_mount_data *data)
1598 struct rpc_timeout timeparms;
1601 dprintk("--> nfs4_init_server()\n");
1603 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1604 data->timeo, data->retrans);
1606 /* Initialise the client representation from the mount data */
1607 server->flags = data->flags;
1608 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1609 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1610 server->caps |= NFS_CAP_READDIRPLUS;
1611 server->options = data->options;
1613 /* Get a client record */
1614 error = nfs4_set_client(server,
1615 data->nfs_server.hostname,
1616 (const struct sockaddr *)&data->nfs_server.address,
1617 data->nfs_server.addrlen,
1618 data->client_address,
1619 data->auth_flavors[0],
1620 data->nfs_server.protocol,
1628 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1631 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1632 server->caps |= NFS_CAP_UIDGID_NOMAP;
1635 server->rsize = nfs_block_size(data->rsize, NULL);
1637 server->wsize = nfs_block_size(data->wsize, NULL);
1639 server->acregmin = data->acregmin * HZ;
1640 server->acregmax = data->acregmax * HZ;
1641 server->acdirmin = data->acdirmin * HZ;
1642 server->acdirmax = data->acdirmax * HZ;
1644 server->port = data->nfs_server.port;
1646 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1650 dprintk("<-- nfs4_init_server() = %d\n", error);
1655 * Create a version 4 volume record
1656 * - keyed on server and FSID
1658 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1659 struct nfs_fh *mntfh)
1661 struct nfs_server *server;
1664 dprintk("--> nfs4_create_server()\n");
1666 server = nfs_alloc_server();
1668 return ERR_PTR(-ENOMEM);
1670 /* set up the general RPC client */
1671 error = nfs4_init_server(server, data);
1675 error = nfs4_server_common_setup(server, mntfh);
1679 dprintk("<-- nfs4_create_server() = %p\n", server);
1683 nfs_free_server(server);
1684 dprintk("<-- nfs4_create_server() = error %d\n", error);
1685 return ERR_PTR(error);
1689 * Create an NFS4 referral server record
1691 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1692 struct nfs_fh *mntfh)
1694 struct nfs_client *parent_client;
1695 struct nfs_server *server, *parent_server;
1698 dprintk("--> nfs4_create_referral_server()\n");
1700 server = nfs_alloc_server();
1702 return ERR_PTR(-ENOMEM);
1704 parent_server = NFS_SB(data->sb);
1705 parent_client = parent_server->nfs_client;
1707 /* Initialise the client representation from the parent server */
1708 nfs_server_copy_userdata(server, parent_server);
1709 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
1711 /* Get a client representation.
1712 * Note: NFSv4 always uses TCP, */
1713 error = nfs4_set_client(server, data->hostname,
1716 parent_client->cl_ipaddr,
1718 rpc_protocol(parent_server->client),
1719 parent_server->client->cl_timeout,
1720 parent_client->cl_mvops->minor_version,
1721 parent_client->cl_net);
1725 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1729 error = nfs4_server_common_setup(server, mntfh);
1733 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1737 nfs_free_server(server);
1738 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1739 return ERR_PTR(error);
1742 #endif /* CONFIG_NFS_V4 */
1745 * Clone an NFS2, NFS3 or NFS4 server record
1747 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1749 struct nfs_fattr *fattr,
1750 rpc_authflavor_t flavor)
1752 struct nfs_server *server;
1753 struct nfs_fattr *fattr_fsinfo;
1756 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1757 (unsigned long long) fattr->fsid.major,
1758 (unsigned long long) fattr->fsid.minor);
1760 server = nfs_alloc_server();
1762 return ERR_PTR(-ENOMEM);
1765 fattr_fsinfo = nfs_alloc_fattr();
1766 if (fattr_fsinfo == NULL)
1767 goto out_free_server;
1769 /* Copy data from the source */
1770 server->nfs_client = source->nfs_client;
1771 server->destroy = source->destroy;
1772 atomic_inc(&server->nfs_client->cl_count);
1773 nfs_server_copy_userdata(server, source);
1775 server->fsid = fattr->fsid;
1777 error = nfs_init_server_rpcclient(server,
1778 source->client->cl_timeout,
1781 goto out_free_server;
1782 if (!IS_ERR(source->client_acl))
1783 nfs_init_server_aclclient(server);
1785 /* probe the filesystem info for this server filesystem */
1786 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1788 goto out_free_server;
1790 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1791 server->namelen = NFS4_MAXNAMLEN;
1793 dprintk("Cloned FSID: %llx:%llx\n",
1794 (unsigned long long) server->fsid.major,
1795 (unsigned long long) server->fsid.minor);
1797 error = nfs_start_lockd(server);
1799 goto out_free_server;
1801 nfs_server_insert_lists(server);
1802 server->mount_time = jiffies;
1804 nfs_free_fattr(fattr_fsinfo);
1805 dprintk("<-- nfs_clone_server() = %p\n", server);
1809 nfs_free_fattr(fattr_fsinfo);
1810 nfs_free_server(server);
1811 dprintk("<-- nfs_clone_server() = error %d\n", error);
1812 return ERR_PTR(error);
1815 void nfs_clients_init(struct net *net)
1817 struct nfs_net *nn = net_generic(net, nfs_net_id);
1819 INIT_LIST_HEAD(&nn->nfs_client_list);
1820 INIT_LIST_HEAD(&nn->nfs_volume_list);
1821 #ifdef CONFIG_NFS_V4
1822 idr_init(&nn->cb_ident_idr);
1824 spin_lock_init(&nn->nfs_client_lock);
1825 nn->boot_time = CURRENT_TIME;
1828 #ifdef CONFIG_PROC_FS
1829 static struct proc_dir_entry *proc_fs_nfs;
1831 static int nfs_server_list_open(struct inode *inode, struct file *file);
1832 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1833 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1834 static void nfs_server_list_stop(struct seq_file *p, void *v);
1835 static int nfs_server_list_show(struct seq_file *m, void *v);
1837 static const struct seq_operations nfs_server_list_ops = {
1838 .start = nfs_server_list_start,
1839 .next = nfs_server_list_next,
1840 .stop = nfs_server_list_stop,
1841 .show = nfs_server_list_show,
1844 static const struct file_operations nfs_server_list_fops = {
1845 .open = nfs_server_list_open,
1847 .llseek = seq_lseek,
1848 .release = seq_release,
1849 .owner = THIS_MODULE,
1852 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1853 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1854 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1855 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1856 static int nfs_volume_list_show(struct seq_file *m, void *v);
1858 static const struct seq_operations nfs_volume_list_ops = {
1859 .start = nfs_volume_list_start,
1860 .next = nfs_volume_list_next,
1861 .stop = nfs_volume_list_stop,
1862 .show = nfs_volume_list_show,
1865 static const struct file_operations nfs_volume_list_fops = {
1866 .open = nfs_volume_list_open,
1868 .llseek = seq_lseek,
1869 .release = seq_release,
1870 .owner = THIS_MODULE,
1874 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1877 static int nfs_server_list_open(struct inode *inode, struct file *file)
1881 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1882 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1884 ret = seq_open(file, &nfs_server_list_ops);
1888 m = file->private_data;
1895 * set up the iterator to start reading from the server list and return the first item
1897 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1899 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1901 /* lock the list against modification */
1902 spin_lock(&nn->nfs_client_lock);
1903 return seq_list_start_head(&nn->nfs_client_list, *_pos);
1907 * move to next server
1909 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1911 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1913 return seq_list_next(v, &nn->nfs_client_list, pos);
1917 * clean up after reading from the transports list
1919 static void nfs_server_list_stop(struct seq_file *p, void *v)
1921 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1923 spin_unlock(&nn->nfs_client_lock);
1927 * display a header line followed by a load of call lines
1929 static int nfs_server_list_show(struct seq_file *m, void *v)
1931 struct nfs_client *clp;
1932 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1934 /* display header on line 1 */
1935 if (v == &nn->nfs_client_list) {
1936 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1940 /* display one transport per line on subsequent lines */
1941 clp = list_entry(v, struct nfs_client, cl_share_link);
1943 /* Check if the client is initialized */
1944 if (clp->cl_cons_state != NFS_CS_READY)
1948 seq_printf(m, "v%u %s %s %3d %s\n",
1949 clp->rpc_ops->version,
1950 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1951 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1952 atomic_read(&clp->cl_count),
1960 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1962 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1966 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1967 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1969 ret = seq_open(file, &nfs_volume_list_ops);
1973 m = file->private_data;
1980 * set up the iterator to start reading from the volume list and return the first item
1982 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1984 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1986 /* lock the list against modification */
1987 spin_lock(&nn->nfs_client_lock);
1988 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
1992 * move to next volume
1994 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1996 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1998 return seq_list_next(v, &nn->nfs_volume_list, pos);
2002 * clean up after reading from the transports list
2004 static void nfs_volume_list_stop(struct seq_file *p, void *v)
2006 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
2008 spin_unlock(&nn->nfs_client_lock);
2012 * display a header line followed by a load of call lines
2014 static int nfs_volume_list_show(struct seq_file *m, void *v)
2016 struct nfs_server *server;
2017 struct nfs_client *clp;
2018 char dev[8], fsid[17];
2019 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
2021 /* display header on line 1 */
2022 if (v == &nn->nfs_volume_list) {
2023 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
2026 /* display one transport per line on subsequent lines */
2027 server = list_entry(v, struct nfs_server, master_link);
2028 clp = server->nfs_client;
2030 snprintf(dev, 8, "%u:%u",
2031 MAJOR(server->s_dev), MINOR(server->s_dev));
2033 snprintf(fsid, 17, "%llx:%llx",
2034 (unsigned long long) server->fsid.major,
2035 (unsigned long long) server->fsid.minor);
2038 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
2039 clp->rpc_ops->version,
2040 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
2041 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
2044 nfs_server_fscache_state(server));
2051 * initialise the /proc/fs/nfsfs/ directory
2053 int __init nfs_fs_proc_init(void)
2055 struct proc_dir_entry *p;
2057 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
2061 /* a file of servers with which we're dealing */
2062 p = proc_create("servers", S_IFREG|S_IRUGO,
2063 proc_fs_nfs, &nfs_server_list_fops);
2067 /* a file of volumes that we have mounted */
2068 p = proc_create("volumes", S_IFREG|S_IRUGO,
2069 proc_fs_nfs, &nfs_volume_list_fops);
2075 remove_proc_entry("servers", proc_fs_nfs);
2077 remove_proc_entry("fs/nfsfs", NULL);
2083 * clean up the /proc/fs/nfsfs/ directory
2085 void nfs_fs_proc_exit(void)
2087 remove_proc_entry("volumes", proc_fs_nfs);
2088 remove_proc_entry("servers", proc_fs_nfs);
2089 remove_proc_entry("fs/nfsfs", NULL);
2092 #endif /* CONFIG_PROC_FS */
2094 module_param(nfs4_disable_idmapping, bool, 0644);
2095 MODULE_PARM_DESC(nfs4_disable_idmapping,
2096 "Turn off NFSv4 idmapping when using 'sec=sys'");