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_deviceid_purge_client(clp);
211 nfs4_destroy_session(clp->cl_session);
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))
462 /* Match the version and minorversion */
463 if (clp->rpc_ops->version != 4 ||
464 clp->cl_minorversion != minorversion)
467 /* Match only the IP address, not the port number */
468 if (!nfs_sockaddr_match_ipaddr(addr, clap))
473 #endif /* CONFIG_NFS_V4_1 */
476 * Find an nfs_client on the list that matches the initialisation data
479 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
481 struct nfs_client *clp;
482 const struct sockaddr *sap = data->addr;
483 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
485 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
486 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
487 /* Don't match clients that failed to initialise properly */
488 if (clp->cl_cons_state < 0)
491 /* Different NFS versions cannot share the same nfs_client */
492 if (clp->rpc_ops != data->rpc_ops)
495 if (clp->cl_proto != data->proto)
497 /* Match nfsv4 minorversion */
498 if (clp->cl_minorversion != data->minorversion)
500 /* Match the full socket address */
501 if (!nfs_sockaddr_cmp(sap, clap))
504 atomic_inc(&clp->cl_count);
510 static bool nfs_client_init_is_complete(const struct nfs_client *clp)
512 return clp->cl_cons_state != NFS_CS_INITING;
515 int nfs_wait_client_init_complete(const struct nfs_client *clp)
517 return wait_event_killable(nfs_client_active_wq,
518 nfs_client_init_is_complete(clp));
522 * Found an existing client. Make sure it's ready before returning.
524 static struct nfs_client *
525 nfs_found_client(const struct nfs_client_initdata *cl_init,
526 struct nfs_client *clp)
530 error = nfs_wait_client_init_complete(clp);
533 return ERR_PTR(-ERESTARTSYS);
536 if (clp->cl_cons_state < NFS_CS_READY) {
537 error = clp->cl_cons_state;
539 return ERR_PTR(error);
542 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
544 dprintk("<-- %s found nfs_client %p for %s\n",
545 __func__, clp, cl_init->hostname ?: "");
550 * Look up a client by IP address and protocol version
551 * - creates a new record if one doesn't yet exist
553 static struct nfs_client *
554 nfs_get_client(const struct nfs_client_initdata *cl_init,
555 const struct rpc_timeout *timeparms,
557 rpc_authflavor_t authflavour)
559 struct nfs_client *clp, *new = NULL;
560 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
562 dprintk("--> nfs_get_client(%s,v%u)\n",
563 cl_init->hostname ?: "", cl_init->rpc_ops->version);
565 /* see if the client already exists */
567 spin_lock(&nn->nfs_client_lock);
569 clp = nfs_match_client(cl_init);
571 spin_unlock(&nn->nfs_client_lock);
573 nfs_free_client(new);
574 return nfs_found_client(cl_init, clp);
577 list_add(&new->cl_share_link, &nn->nfs_client_list);
578 spin_unlock(&nn->nfs_client_lock);
579 new->cl_flags = cl_init->init_flags;
580 return cl_init->rpc_ops->init_client(new,
585 spin_unlock(&nn->nfs_client_lock);
587 new = nfs_alloc_client(cl_init);
588 } while (!IS_ERR(new));
590 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
591 cl_init->hostname ?: "", PTR_ERR(new));
596 * Mark a server as ready or failed
598 void nfs_mark_client_ready(struct nfs_client *clp, int state)
600 clp->cl_cons_state = state;
601 wake_up_all(&nfs_client_active_wq);
605 * Initialise the timeout values for a connection
607 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
608 unsigned int timeo, unsigned int retrans)
610 to->to_initval = timeo * HZ / 10;
611 to->to_retries = retrans;
614 case XPRT_TRANSPORT_TCP:
615 case XPRT_TRANSPORT_RDMA:
616 if (to->to_retries == 0)
617 to->to_retries = NFS_DEF_TCP_RETRANS;
618 if (to->to_initval == 0)
619 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
620 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
621 to->to_initval = NFS_MAX_TCP_TIMEOUT;
622 to->to_increment = to->to_initval;
623 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
624 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
625 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
626 if (to->to_maxval < to->to_initval)
627 to->to_maxval = to->to_initval;
628 to->to_exponential = 0;
630 case XPRT_TRANSPORT_UDP:
631 if (to->to_retries == 0)
632 to->to_retries = NFS_DEF_UDP_RETRANS;
634 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
635 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
636 to->to_initval = NFS_MAX_UDP_TIMEOUT;
637 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
638 to->to_exponential = 1;
646 * Create an RPC client handle
648 static int nfs_create_rpc_client(struct nfs_client *clp,
649 const struct rpc_timeout *timeparms,
650 rpc_authflavor_t flavor)
652 struct rpc_clnt *clnt = NULL;
653 struct rpc_create_args args = {
655 .protocol = clp->cl_proto,
656 .address = (struct sockaddr *)&clp->cl_addr,
657 .addrsize = clp->cl_addrlen,
658 .timeout = timeparms,
659 .servername = clp->cl_hostname,
660 .program = &nfs_program,
661 .version = clp->rpc_ops->version,
662 .authflavor = flavor,
665 if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
666 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
667 if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags))
668 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
670 if (!IS_ERR(clp->cl_rpcclient))
673 clnt = rpc_create(&args);
675 dprintk("%s: cannot create RPC client. Error = %ld\n",
676 __func__, PTR_ERR(clnt));
677 return PTR_ERR(clnt);
680 clp->cl_rpcclient = clnt;
685 * Version 2 or 3 client destruction
687 static void nfs_destroy_server(struct nfs_server *server)
689 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
690 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
691 nlmclnt_done(server->nlm_host);
695 * Version 2 or 3 lockd setup
697 static int nfs_start_lockd(struct nfs_server *server)
699 struct nlm_host *host;
700 struct nfs_client *clp = server->nfs_client;
701 struct nlmclnt_initdata nlm_init = {
702 .hostname = clp->cl_hostname,
703 .address = (struct sockaddr *)&clp->cl_addr,
704 .addrlen = clp->cl_addrlen,
705 .nfs_version = clp->rpc_ops->version,
706 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
711 if (nlm_init.nfs_version > 3)
713 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
714 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
717 switch (clp->cl_proto) {
719 nlm_init.protocol = IPPROTO_TCP;
721 case XPRT_TRANSPORT_UDP:
722 nlm_init.protocol = IPPROTO_UDP;
725 host = nlmclnt_init(&nlm_init);
727 return PTR_ERR(host);
729 server->nlm_host = host;
730 server->destroy = nfs_destroy_server;
735 * Initialise an NFSv3 ACL client connection
737 #ifdef CONFIG_NFS_V3_ACL
738 static void nfs_init_server_aclclient(struct nfs_server *server)
740 if (server->nfs_client->rpc_ops->version != 3)
742 if (server->flags & NFS_MOUNT_NOACL)
745 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
746 if (IS_ERR(server->client_acl))
749 /* No errors! Assume that Sun nfsacls are supported */
750 server->caps |= NFS_CAP_ACLS;
754 server->caps &= ~NFS_CAP_ACLS;
757 static inline void nfs_init_server_aclclient(struct nfs_server *server)
759 server->flags &= ~NFS_MOUNT_NOACL;
760 server->caps &= ~NFS_CAP_ACLS;
765 * Create a general RPC client
767 static int nfs_init_server_rpcclient(struct nfs_server *server,
768 const struct rpc_timeout *timeo,
769 rpc_authflavor_t pseudoflavour)
771 struct nfs_client *clp = server->nfs_client;
773 server->client = rpc_clone_client(clp->cl_rpcclient);
774 if (IS_ERR(server->client)) {
775 dprintk("%s: couldn't create rpc_client!\n", __func__);
776 return PTR_ERR(server->client);
779 memcpy(&server->client->cl_timeout_default,
781 sizeof(server->client->cl_timeout_default));
782 server->client->cl_timeout = &server->client->cl_timeout_default;
784 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
785 struct rpc_auth *auth;
787 auth = rpcauth_create(pseudoflavour, server->client);
789 dprintk("%s: couldn't create credcache!\n", __func__);
790 return PTR_ERR(auth);
793 server->client->cl_softrtry = 0;
794 if (server->flags & NFS_MOUNT_SOFT)
795 server->client->cl_softrtry = 1;
801 * nfs_init_client - Initialise an NFS2 or NFS3 client
803 * @clp: nfs_client to initialise
804 * @timeparms: timeout parameters for underlying RPC transport
805 * @ip_addr: IP presentation address (not used)
806 * @authflavor: authentication flavor for underlying RPC transport
808 * Returns pointer to an NFS client, or an ERR_PTR value.
810 struct nfs_client *nfs_init_client(struct nfs_client *clp,
811 const struct rpc_timeout *timeparms,
812 const char *ip_addr, rpc_authflavor_t authflavour)
816 if (clp->cl_cons_state == NFS_CS_READY) {
817 /* the client is already initialised */
818 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
823 * Create a client RPC handle for doing FSSTAT with UNIX auth only
824 * - RFC 2623, sec 2.3.2
826 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
829 nfs_mark_client_ready(clp, NFS_CS_READY);
833 nfs_mark_client_ready(clp, error);
835 dprintk("<-- nfs_init_client() = xerror %d\n", error);
836 return ERR_PTR(error);
840 * Create a version 2 or 3 client
842 static int nfs_init_server(struct nfs_server *server,
843 const struct nfs_parsed_mount_data *data)
845 struct nfs_client_initdata cl_init = {
846 .hostname = data->nfs_server.hostname,
847 .addr = (const struct sockaddr *)&data->nfs_server.address,
848 .addrlen = data->nfs_server.addrlen,
850 .proto = data->nfs_server.protocol,
853 struct rpc_timeout timeparms;
854 struct nfs_client *clp;
857 dprintk("--> nfs_init_server()\n");
859 switch (data->version) {
862 cl_init.rpc_ops = &nfs_v2_clientops;
867 cl_init.rpc_ops = &nfs_v3_clientops;
871 return -EPROTONOSUPPORT;
874 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
875 data->timeo, data->retrans);
876 if (data->flags & NFS_MOUNT_NORESVPORT)
877 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
879 /* Allocate or find a client reference we can use */
880 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX);
882 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
886 server->nfs_client = clp;
888 /* Initialise the client representation from the mount data */
889 server->flags = data->flags;
890 server->options = data->options;
891 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
892 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
893 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR;
896 server->rsize = nfs_block_size(data->rsize, NULL);
898 server->wsize = nfs_block_size(data->wsize, NULL);
900 server->acregmin = data->acregmin * HZ;
901 server->acregmax = data->acregmax * HZ;
902 server->acdirmin = data->acdirmin * HZ;
903 server->acdirmax = data->acdirmax * HZ;
905 /* Start lockd here, before we might error out */
906 error = nfs_start_lockd(server);
910 server->port = data->nfs_server.port;
912 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
916 /* Preserve the values of mount_server-related mount options */
917 if (data->mount_server.addrlen) {
918 memcpy(&server->mountd_address, &data->mount_server.address,
919 data->mount_server.addrlen);
920 server->mountd_addrlen = data->mount_server.addrlen;
922 server->mountd_version = data->mount_server.version;
923 server->mountd_port = data->mount_server.port;
924 server->mountd_protocol = data->mount_server.protocol;
926 server->namelen = data->namlen;
927 /* Create a client RPC handle for the NFSv3 ACL management interface */
928 nfs_init_server_aclclient(server);
929 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
933 server->nfs_client = NULL;
935 dprintk("<-- nfs_init_server() = xerror %d\n", error);
940 * Load up the server record from information gained in an fsinfo record
942 static void nfs_server_set_fsinfo(struct nfs_server *server,
943 struct nfs_fh *mntfh,
944 struct nfs_fsinfo *fsinfo)
946 unsigned long max_rpc_payload;
948 /* Work out a lot of parameters */
949 if (server->rsize == 0)
950 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
951 if (server->wsize == 0)
952 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
954 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
955 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
956 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
957 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
959 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
960 if (server->rsize > max_rpc_payload)
961 server->rsize = max_rpc_payload;
962 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
963 server->rsize = NFS_MAX_FILE_IO_SIZE;
964 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
966 server->backing_dev_info.name = "nfs";
967 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
969 if (server->wsize > max_rpc_payload)
970 server->wsize = max_rpc_payload;
971 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
972 server->wsize = NFS_MAX_FILE_IO_SIZE;
973 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
974 server->pnfs_blksize = fsinfo->blksize;
975 set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
977 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
979 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
980 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
981 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
982 if (server->dtsize > server->rsize)
983 server->dtsize = server->rsize;
985 if (server->flags & NFS_MOUNT_NOAC) {
986 server->acregmin = server->acregmax = 0;
987 server->acdirmin = server->acdirmax = 0;
990 server->maxfilesize = fsinfo->maxfilesize;
992 server->time_delta = fsinfo->time_delta;
994 /* We're airborne Set socket buffersize */
995 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
999 * Probe filesystem information, including the FSID on v2/v3
1001 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
1003 struct nfs_fsinfo fsinfo;
1004 struct nfs_client *clp = server->nfs_client;
1007 dprintk("--> nfs_probe_fsinfo()\n");
1009 if (clp->rpc_ops->set_capabilities != NULL) {
1010 error = clp->rpc_ops->set_capabilities(server, mntfh);
1015 fsinfo.fattr = fattr;
1016 fsinfo.layouttype = 0;
1017 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
1021 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
1023 /* Get some general file system info */
1024 if (server->namelen == 0) {
1025 struct nfs_pathconf pathinfo;
1027 pathinfo.fattr = fattr;
1028 nfs_fattr_init(fattr);
1030 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
1031 server->namelen = pathinfo.max_namelen;
1034 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1038 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1043 * Copy useful information when duplicating a server record
1045 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1047 target->flags = source->flags;
1048 target->rsize = source->rsize;
1049 target->wsize = source->wsize;
1050 target->acregmin = source->acregmin;
1051 target->acregmax = source->acregmax;
1052 target->acdirmin = source->acdirmin;
1053 target->acdirmax = source->acdirmax;
1054 target->caps = source->caps;
1055 target->options = source->options;
1058 static void nfs_server_insert_lists(struct nfs_server *server)
1060 struct nfs_client *clp = server->nfs_client;
1061 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1063 spin_lock(&nn->nfs_client_lock);
1064 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
1065 list_add_tail(&server->master_link, &nn->nfs_volume_list);
1066 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1067 spin_unlock(&nn->nfs_client_lock);
1071 static void nfs_server_remove_lists(struct nfs_server *server)
1073 struct nfs_client *clp = server->nfs_client;
1078 nn = net_generic(clp->cl_net, nfs_net_id);
1079 spin_lock(&nn->nfs_client_lock);
1080 list_del_rcu(&server->client_link);
1081 if (list_empty(&clp->cl_superblocks))
1082 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1083 list_del(&server->master_link);
1084 spin_unlock(&nn->nfs_client_lock);
1090 * Allocate and initialise a server record
1092 static struct nfs_server *nfs_alloc_server(void)
1094 struct nfs_server *server;
1096 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1100 server->client = server->client_acl = ERR_PTR(-EINVAL);
1102 /* Zero out the NFS state stuff */
1103 INIT_LIST_HEAD(&server->client_link);
1104 INIT_LIST_HEAD(&server->master_link);
1105 INIT_LIST_HEAD(&server->delegations);
1106 INIT_LIST_HEAD(&server->layouts);
1107 INIT_LIST_HEAD(&server->state_owners_lru);
1109 atomic_set(&server->active, 0);
1111 server->io_stats = nfs_alloc_iostats();
1112 if (!server->io_stats) {
1117 if (bdi_init(&server->backing_dev_info)) {
1118 nfs_free_iostats(server->io_stats);
1123 ida_init(&server->openowner_id);
1124 ida_init(&server->lockowner_id);
1125 pnfs_init_server(server);
1131 * Free up a server record
1133 void nfs_free_server(struct nfs_server *server)
1135 dprintk("--> nfs_free_server()\n");
1137 nfs_server_remove_lists(server);
1138 unset_pnfs_layoutdriver(server);
1140 if (server->destroy != NULL)
1141 server->destroy(server);
1143 if (!IS_ERR(server->client_acl))
1144 rpc_shutdown_client(server->client_acl);
1145 if (!IS_ERR(server->client))
1146 rpc_shutdown_client(server->client);
1148 nfs_put_client(server->nfs_client);
1150 ida_destroy(&server->lockowner_id);
1151 ida_destroy(&server->openowner_id);
1152 nfs_free_iostats(server->io_stats);
1153 bdi_destroy(&server->backing_dev_info);
1155 nfs_release_automount_timer();
1156 dprintk("<-- nfs_free_server()\n");
1160 * Create a version 2 or 3 volume record
1161 * - keyed on server and FSID
1163 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1164 struct nfs_fh *mntfh)
1166 struct nfs_server *server;
1167 struct nfs_fattr *fattr;
1170 server = nfs_alloc_server();
1172 return ERR_PTR(-ENOMEM);
1175 fattr = nfs_alloc_fattr();
1179 /* Get a client representation */
1180 error = nfs_init_server(server, data);
1184 BUG_ON(!server->nfs_client);
1185 BUG_ON(!server->nfs_client->rpc_ops);
1186 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1188 /* Probe the root fh to retrieve its FSID */
1189 error = nfs_probe_fsinfo(server, mntfh, fattr);
1192 if (server->nfs_client->rpc_ops->version == 3) {
1193 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1194 server->namelen = NFS3_MAXNAMLEN;
1195 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1196 server->caps |= NFS_CAP_READDIRPLUS;
1198 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1199 server->namelen = NFS2_MAXNAMLEN;
1202 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1203 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
1205 dprintk("nfs_create_server: getattr error = %d\n", -error);
1209 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
1211 dprintk("Server FSID: %llx:%llx\n",
1212 (unsigned long long) server->fsid.major,
1213 (unsigned long long) server->fsid.minor);
1215 nfs_server_insert_lists(server);
1216 server->mount_time = jiffies;
1217 nfs_free_fattr(fattr);
1221 nfs_free_fattr(fattr);
1222 nfs_free_server(server);
1223 return ERR_PTR(error);
1226 #ifdef CONFIG_NFS_V4
1228 * NFSv4.0 callback thread helper
1230 * Find a client by callback identifier
1233 nfs4_find_client_ident(struct net *net, int cb_ident)
1235 struct nfs_client *clp;
1236 struct nfs_net *nn = net_generic(net, nfs_net_id);
1238 spin_lock(&nn->nfs_client_lock);
1239 clp = idr_find(&nn->cb_ident_idr, cb_ident);
1241 atomic_inc(&clp->cl_count);
1242 spin_unlock(&nn->nfs_client_lock);
1246 #if defined(CONFIG_NFS_V4_1)
1248 * NFSv4.1 callback thread helper
1249 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1250 * minorversion, and sessionID
1252 * Returns NULL if no such client
1255 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1256 struct nfs4_sessionid *sid)
1258 struct nfs_client *clp;
1259 struct nfs_net *nn = net_generic(net, nfs_net_id);
1261 spin_lock(&nn->nfs_client_lock);
1262 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
1263 if (nfs4_cb_match_client(addr, clp, 1) == false)
1266 if (!nfs4_has_session(clp))
1269 /* Match sessionid*/
1270 if (memcmp(clp->cl_session->sess_id.data,
1271 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
1274 atomic_inc(&clp->cl_count);
1275 spin_unlock(&nn->nfs_client_lock);
1278 spin_unlock(&nn->nfs_client_lock);
1282 #else /* CONFIG_NFS_V4_1 */
1285 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1286 struct nfs4_sessionid *sid)
1290 #endif /* CONFIG_NFS_V4_1 */
1293 * Initialize the NFS4 callback service
1295 static int nfs4_init_callback(struct nfs_client *clp)
1299 if (clp->rpc_ops->version == 4) {
1300 struct rpc_xprt *xprt;
1302 xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt);
1304 if (nfs4_has_session(clp)) {
1305 error = xprt_setup_backchannel(xprt,
1306 NFS41_BC_MIN_CALLBACKS);
1311 error = nfs_callback_up(clp->cl_mvops->minor_version, xprt);
1313 dprintk("%s: failed to start callback. Error = %d\n",
1317 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1323 * Initialize the minor version specific parts of an NFS4 client record
1325 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1327 #if defined(CONFIG_NFS_V4_1)
1328 if (clp->cl_mvops->minor_version) {
1329 struct nfs4_session *session = NULL;
1331 * Create the session and mark it expired.
1332 * When a SEQUENCE operation encounters the expired session
1333 * it will do session recovery to initialize it.
1335 session = nfs4_alloc_session(clp);
1339 clp->cl_session = session;
1341 * The create session reply races with the server back
1342 * channel probe. Mark the client NFS_CS_SESSION_INITING
1343 * so that the client back channel can find the
1346 nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING);
1348 #endif /* CONFIG_NFS_V4_1 */
1350 return nfs4_init_callback(clp);
1354 * nfs4_init_client - Initialise an NFS4 client record
1356 * @clp: nfs_client to initialise
1357 * @timeparms: timeout parameters for underlying RPC transport
1358 * @ip_addr: callback IP address in presentation format
1359 * @authflavor: authentication flavor for underlying RPC transport
1361 * Returns pointer to an NFS client, or an ERR_PTR value.
1363 struct nfs_client *nfs4_init_client(struct nfs_client *clp,
1364 const struct rpc_timeout *timeparms,
1365 const char *ip_addr,
1366 rpc_authflavor_t authflavour)
1368 char buf[INET6_ADDRSTRLEN + 1];
1371 if (clp->cl_cons_state == NFS_CS_READY) {
1372 /* the client is initialised already */
1373 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1377 /* Check NFS protocol revision and initialize RPC op vector */
1378 clp->rpc_ops = &nfs_v4_clientops;
1380 __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags);
1381 error = nfs_create_rpc_client(clp, timeparms, authflavour);
1385 /* If no clientaddr= option was specified, find a usable cb address */
1386 if (ip_addr == NULL) {
1387 struct sockaddr_storage cb_addr;
1388 struct sockaddr *sap = (struct sockaddr *)&cb_addr;
1390 error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
1393 error = rpc_ntop(sap, buf, sizeof(buf));
1396 ip_addr = (const char *)buf;
1398 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1400 error = nfs_idmap_new(clp);
1402 dprintk("%s: failed to create idmapper. Error = %d\n",
1406 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1408 error = nfs4_init_client_minor_version(clp);
1412 if (!nfs4_has_session(clp))
1413 nfs_mark_client_ready(clp, NFS_CS_READY);
1417 nfs_mark_client_ready(clp, error);
1418 nfs_put_client(clp);
1419 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1420 return ERR_PTR(error);
1424 * Set up an NFS4 client
1426 static int nfs4_set_client(struct nfs_server *server,
1427 const char *hostname,
1428 const struct sockaddr *addr,
1429 const size_t addrlen,
1430 const char *ip_addr,
1431 rpc_authflavor_t authflavour,
1432 int proto, const struct rpc_timeout *timeparms,
1433 u32 minorversion, struct net *net)
1435 struct nfs_client_initdata cl_init = {
1436 .hostname = hostname,
1439 .rpc_ops = &nfs_v4_clientops,
1441 .minorversion = minorversion,
1444 struct nfs_client *clp;
1447 dprintk("--> nfs4_set_client()\n");
1449 if (server->flags & NFS_MOUNT_NORESVPORT)
1450 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
1452 /* Allocate or find a client reference we can use */
1453 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour);
1455 error = PTR_ERR(clp);
1460 * Query for the lease time on clientid setup or renewal
1462 * Note that this will be set on nfs_clients that were created
1463 * only for the DS role and did not set this bit, but now will
1464 * serve a dual role.
1466 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1468 server->nfs_client = clp;
1469 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1472 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1477 * Set up a pNFS Data Server client.
1479 * Return any existing nfs_client that matches server address,port,version
1482 * For a new nfs_client, use a soft mount (default), a low retrans and a
1483 * low timeout interval so that if a connection is lost, we retry through
1486 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1487 const struct sockaddr *ds_addr, int ds_addrlen,
1488 int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans)
1490 struct nfs_client_initdata cl_init = {
1492 .addrlen = ds_addrlen,
1493 .rpc_ops = &nfs_v4_clientops,
1495 .minorversion = mds_clp->cl_minorversion,
1496 .net = mds_clp->cl_net,
1498 struct rpc_timeout ds_timeout;
1499 struct nfs_client *clp;
1502 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1503 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1504 * (section 13.1 RFC 5661).
1506 nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
1507 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1508 mds_clp->cl_rpcclient->cl_auth->au_flavor);
1510 dprintk("<-- %s %p\n", __func__, clp);
1513 EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
1516 * Session has been established, and the client marked ready.
1517 * Set the mount rsize and wsize with negotiated fore channel
1518 * attributes which will be bound checked in nfs_server_set_fsinfo.
1520 static void nfs4_session_set_rwsize(struct nfs_server *server)
1522 #ifdef CONFIG_NFS_V4_1
1523 struct nfs4_session *sess;
1527 if (!nfs4_has_session(server->nfs_client))
1529 sess = server->nfs_client->cl_session;
1530 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1531 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1533 if (server->rsize > server_resp_sz)
1534 server->rsize = server_resp_sz;
1535 if (server->wsize > server_rqst_sz)
1536 server->wsize = server_rqst_sz;
1537 #endif /* CONFIG_NFS_V4_1 */
1540 static int nfs4_server_common_setup(struct nfs_server *server,
1541 struct nfs_fh *mntfh)
1543 struct nfs_fattr *fattr;
1546 BUG_ON(!server->nfs_client);
1547 BUG_ON(!server->nfs_client->rpc_ops);
1548 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1550 /* data servers support only a subset of NFSv4.1 */
1551 if (is_ds_only_client(server->nfs_client))
1552 return -EPROTONOSUPPORT;
1554 fattr = nfs_alloc_fattr();
1558 /* We must ensure the session is initialised first */
1559 error = nfs4_init_session(server);
1563 /* Probe the root fh to retrieve its FSID and filehandle */
1564 error = nfs4_get_rootfh(server, mntfh);
1568 dprintk("Server FSID: %llx:%llx\n",
1569 (unsigned long long) server->fsid.major,
1570 (unsigned long long) server->fsid.minor);
1571 dprintk("Mount FH: %d\n", mntfh->size);
1573 nfs4_session_set_rwsize(server);
1575 error = nfs_probe_fsinfo(server, mntfh, fattr);
1579 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1580 server->namelen = NFS4_MAXNAMLEN;
1582 nfs_server_insert_lists(server);
1583 server->mount_time = jiffies;
1584 server->destroy = nfs4_destroy_server;
1586 nfs_free_fattr(fattr);
1591 * Create a version 4 volume record
1593 static int nfs4_init_server(struct nfs_server *server,
1594 const struct nfs_parsed_mount_data *data)
1596 struct rpc_timeout timeparms;
1599 dprintk("--> nfs4_init_server()\n");
1601 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1602 data->timeo, data->retrans);
1604 /* Initialise the client representation from the mount data */
1605 server->flags = data->flags;
1606 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1607 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1608 server->caps |= NFS_CAP_READDIRPLUS;
1609 server->options = data->options;
1611 /* Get a client record */
1612 error = nfs4_set_client(server,
1613 data->nfs_server.hostname,
1614 (const struct sockaddr *)&data->nfs_server.address,
1615 data->nfs_server.addrlen,
1616 data->client_address,
1617 data->auth_flavors[0],
1618 data->nfs_server.protocol,
1626 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1629 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1630 server->caps |= NFS_CAP_UIDGID_NOMAP;
1633 server->rsize = nfs_block_size(data->rsize, NULL);
1635 server->wsize = nfs_block_size(data->wsize, NULL);
1637 server->acregmin = data->acregmin * HZ;
1638 server->acregmax = data->acregmax * HZ;
1639 server->acdirmin = data->acdirmin * HZ;
1640 server->acdirmax = data->acdirmax * HZ;
1642 server->port = data->nfs_server.port;
1644 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1648 dprintk("<-- nfs4_init_server() = %d\n", error);
1653 * Create a version 4 volume record
1654 * - keyed on server and FSID
1656 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1657 struct nfs_fh *mntfh)
1659 struct nfs_server *server;
1662 dprintk("--> nfs4_create_server()\n");
1664 server = nfs_alloc_server();
1666 return ERR_PTR(-ENOMEM);
1668 /* set up the general RPC client */
1669 error = nfs4_init_server(server, data);
1673 error = nfs4_server_common_setup(server, mntfh);
1677 dprintk("<-- nfs4_create_server() = %p\n", server);
1681 nfs_free_server(server);
1682 dprintk("<-- nfs4_create_server() = error %d\n", error);
1683 return ERR_PTR(error);
1687 * Create an NFS4 referral server record
1689 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1690 struct nfs_fh *mntfh)
1692 struct nfs_client *parent_client;
1693 struct nfs_server *server, *parent_server;
1696 dprintk("--> nfs4_create_referral_server()\n");
1698 server = nfs_alloc_server();
1700 return ERR_PTR(-ENOMEM);
1702 parent_server = NFS_SB(data->sb);
1703 parent_client = parent_server->nfs_client;
1705 /* Initialise the client representation from the parent server */
1706 nfs_server_copy_userdata(server, parent_server);
1707 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
1709 /* Get a client representation.
1710 * Note: NFSv4 always uses TCP, */
1711 error = nfs4_set_client(server, data->hostname,
1714 parent_client->cl_ipaddr,
1716 rpc_protocol(parent_server->client),
1717 parent_server->client->cl_timeout,
1718 parent_client->cl_mvops->minor_version,
1719 parent_client->cl_net);
1723 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1727 error = nfs4_server_common_setup(server, mntfh);
1731 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1735 nfs_free_server(server);
1736 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1737 return ERR_PTR(error);
1740 #endif /* CONFIG_NFS_V4 */
1743 * Clone an NFS2, NFS3 or NFS4 server record
1745 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1747 struct nfs_fattr *fattr,
1748 rpc_authflavor_t flavor)
1750 struct nfs_server *server;
1751 struct nfs_fattr *fattr_fsinfo;
1754 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1755 (unsigned long long) fattr->fsid.major,
1756 (unsigned long long) fattr->fsid.minor);
1758 server = nfs_alloc_server();
1760 return ERR_PTR(-ENOMEM);
1763 fattr_fsinfo = nfs_alloc_fattr();
1764 if (fattr_fsinfo == NULL)
1765 goto out_free_server;
1767 /* Copy data from the source */
1768 server->nfs_client = source->nfs_client;
1769 server->destroy = source->destroy;
1770 atomic_inc(&server->nfs_client->cl_count);
1771 nfs_server_copy_userdata(server, source);
1773 server->fsid = fattr->fsid;
1775 error = nfs_init_server_rpcclient(server,
1776 source->client->cl_timeout,
1779 goto out_free_server;
1780 if (!IS_ERR(source->client_acl))
1781 nfs_init_server_aclclient(server);
1783 /* probe the filesystem info for this server filesystem */
1784 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1786 goto out_free_server;
1788 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1789 server->namelen = NFS4_MAXNAMLEN;
1791 dprintk("Cloned FSID: %llx:%llx\n",
1792 (unsigned long long) server->fsid.major,
1793 (unsigned long long) server->fsid.minor);
1795 error = nfs_start_lockd(server);
1797 goto out_free_server;
1799 nfs_server_insert_lists(server);
1800 server->mount_time = jiffies;
1802 nfs_free_fattr(fattr_fsinfo);
1803 dprintk("<-- nfs_clone_server() = %p\n", server);
1807 nfs_free_fattr(fattr_fsinfo);
1808 nfs_free_server(server);
1809 dprintk("<-- nfs_clone_server() = error %d\n", error);
1810 return ERR_PTR(error);
1813 void nfs_clients_init(struct net *net)
1815 struct nfs_net *nn = net_generic(net, nfs_net_id);
1817 INIT_LIST_HEAD(&nn->nfs_client_list);
1818 INIT_LIST_HEAD(&nn->nfs_volume_list);
1819 #ifdef CONFIG_NFS_V4
1820 idr_init(&nn->cb_ident_idr);
1822 spin_lock_init(&nn->nfs_client_lock);
1823 nn->boot_time = CURRENT_TIME;
1826 #ifdef CONFIG_PROC_FS
1827 static struct proc_dir_entry *proc_fs_nfs;
1829 static int nfs_server_list_open(struct inode *inode, struct file *file);
1830 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1831 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1832 static void nfs_server_list_stop(struct seq_file *p, void *v);
1833 static int nfs_server_list_show(struct seq_file *m, void *v);
1835 static const struct seq_operations nfs_server_list_ops = {
1836 .start = nfs_server_list_start,
1837 .next = nfs_server_list_next,
1838 .stop = nfs_server_list_stop,
1839 .show = nfs_server_list_show,
1842 static const struct file_operations nfs_server_list_fops = {
1843 .open = nfs_server_list_open,
1845 .llseek = seq_lseek,
1846 .release = seq_release,
1847 .owner = THIS_MODULE,
1850 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1851 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1852 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1853 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1854 static int nfs_volume_list_show(struct seq_file *m, void *v);
1856 static const struct seq_operations nfs_volume_list_ops = {
1857 .start = nfs_volume_list_start,
1858 .next = nfs_volume_list_next,
1859 .stop = nfs_volume_list_stop,
1860 .show = nfs_volume_list_show,
1863 static const struct file_operations nfs_volume_list_fops = {
1864 .open = nfs_volume_list_open,
1866 .llseek = seq_lseek,
1867 .release = seq_release,
1868 .owner = THIS_MODULE,
1872 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1875 static int nfs_server_list_open(struct inode *inode, struct file *file)
1879 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1880 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1882 ret = seq_open(file, &nfs_server_list_ops);
1886 m = file->private_data;
1893 * set up the iterator to start reading from the server list and return the first item
1895 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1897 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1899 /* lock the list against modification */
1900 spin_lock(&nn->nfs_client_lock);
1901 return seq_list_start_head(&nn->nfs_client_list, *_pos);
1905 * move to next server
1907 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1909 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1911 return seq_list_next(v, &nn->nfs_client_list, pos);
1915 * clean up after reading from the transports list
1917 static void nfs_server_list_stop(struct seq_file *p, void *v)
1919 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1921 spin_unlock(&nn->nfs_client_lock);
1925 * display a header line followed by a load of call lines
1927 static int nfs_server_list_show(struct seq_file *m, void *v)
1929 struct nfs_client *clp;
1930 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1932 /* display header on line 1 */
1933 if (v == &nn->nfs_client_list) {
1934 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1938 /* display one transport per line on subsequent lines */
1939 clp = list_entry(v, struct nfs_client, cl_share_link);
1941 /* Check if the client is initialized */
1942 if (clp->cl_cons_state != NFS_CS_READY)
1946 seq_printf(m, "v%u %s %s %3d %s\n",
1947 clp->rpc_ops->version,
1948 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1949 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1950 atomic_read(&clp->cl_count),
1958 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1960 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1964 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1965 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1967 ret = seq_open(file, &nfs_volume_list_ops);
1971 m = file->private_data;
1978 * set up the iterator to start reading from the volume list and return the first item
1980 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1982 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1984 /* lock the list against modification */
1985 spin_lock(&nn->nfs_client_lock);
1986 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
1990 * move to next volume
1992 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1994 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1996 return seq_list_next(v, &nn->nfs_volume_list, pos);
2000 * clean up after reading from the transports list
2002 static void nfs_volume_list_stop(struct seq_file *p, void *v)
2004 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
2006 spin_unlock(&nn->nfs_client_lock);
2010 * display a header line followed by a load of call lines
2012 static int nfs_volume_list_show(struct seq_file *m, void *v)
2014 struct nfs_server *server;
2015 struct nfs_client *clp;
2016 char dev[8], fsid[17];
2017 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
2019 /* display header on line 1 */
2020 if (v == &nn->nfs_volume_list) {
2021 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
2024 /* display one transport per line on subsequent lines */
2025 server = list_entry(v, struct nfs_server, master_link);
2026 clp = server->nfs_client;
2028 snprintf(dev, 8, "%u:%u",
2029 MAJOR(server->s_dev), MINOR(server->s_dev));
2031 snprintf(fsid, 17, "%llx:%llx",
2032 (unsigned long long) server->fsid.major,
2033 (unsigned long long) server->fsid.minor);
2036 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
2037 clp->rpc_ops->version,
2038 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
2039 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
2042 nfs_server_fscache_state(server));
2049 * initialise the /proc/fs/nfsfs/ directory
2051 int __init nfs_fs_proc_init(void)
2053 struct proc_dir_entry *p;
2055 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
2059 /* a file of servers with which we're dealing */
2060 p = proc_create("servers", S_IFREG|S_IRUGO,
2061 proc_fs_nfs, &nfs_server_list_fops);
2065 /* a file of volumes that we have mounted */
2066 p = proc_create("volumes", S_IFREG|S_IRUGO,
2067 proc_fs_nfs, &nfs_volume_list_fops);
2073 remove_proc_entry("servers", proc_fs_nfs);
2075 remove_proc_entry("fs/nfsfs", NULL);
2081 * clean up the /proc/fs/nfsfs/ directory
2083 void nfs_fs_proc_exit(void)
2085 remove_proc_entry("volumes", proc_fs_nfs);
2086 remove_proc_entry("servers", proc_fs_nfs);
2087 remove_proc_entry("fs/nfsfs", NULL);
2090 #endif /* CONFIG_PROC_FS */
2092 module_param(nfs4_disable_idmapping, bool, 0644);
2093 MODULE_PARM_DESC(nfs4_disable_idmapping,
2094 "Turn off NFSv4 idmapping when using 'sec=sys'");