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 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);
180 cred = rpc_lookup_machine_cred("*");
182 clp->cl_machine_cred = cred;
183 nfs_fscache_get_client_cookie(clp);
194 #ifdef CONFIG_NFS_V4_1
195 static void nfs4_shutdown_session(struct nfs_client *clp)
197 if (nfs4_has_session(clp)) {
198 nfs4_destroy_session(clp->cl_session);
199 nfs4_destroy_clientid(clp);
203 #else /* CONFIG_NFS_V4_1 */
204 static void nfs4_shutdown_session(struct nfs_client *clp)
207 #endif /* CONFIG_NFS_V4_1 */
209 struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
212 struct nfs_client *clp = nfs_alloc_client(cl_init);
216 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
220 spin_lock_init(&clp->cl_lock);
221 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
222 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
223 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
224 clp->cl_minorversion = cl_init->minorversion;
225 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
234 * Destroy the NFS4 callback service
236 static void nfs4_destroy_callback(struct nfs_client *clp)
238 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
239 nfs_callback_down(clp->cl_mvops->minor_version);
242 static void nfs4_shutdown_client(struct nfs_client *clp)
244 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
245 nfs4_kill_renewd(clp);
246 nfs4_shutdown_session(clp);
247 nfs4_destroy_callback(clp);
248 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
249 nfs_idmap_delete(clp);
251 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
252 kfree(clp->cl_serverowner);
253 kfree(clp->cl_serverscope);
254 kfree(clp->cl_implid);
257 void nfs4_free_client(struct nfs_client *clp)
259 nfs4_shutdown_client(clp);
260 nfs_free_client(clp);
263 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
264 void nfs_cleanup_cb_ident_idr(struct net *net)
266 struct nfs_net *nn = net_generic(net, nfs_net_id);
268 idr_destroy(&nn->cb_ident_idr);
271 /* nfs_client_lock held */
272 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
274 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
276 if (clp->cl_cb_ident)
277 idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
280 static void pnfs_init_server(struct nfs_server *server)
282 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
285 static void nfs4_destroy_server(struct nfs_server *server)
287 nfs_server_return_all_delegations(server);
288 unset_pnfs_layoutdriver(server);
289 nfs4_purge_state_owners(server);
293 void nfs_cleanup_cb_ident_idr(struct net *net)
297 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
301 static void pnfs_init_server(struct nfs_server *server)
305 #endif /* CONFIG_NFS_V4 */
308 * Destroy a shared client record
310 void nfs_free_client(struct nfs_client *clp)
312 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
314 nfs_fscache_release_client_cookie(clp);
316 /* -EIO all pending I/O */
317 if (!IS_ERR(clp->cl_rpcclient))
318 rpc_shutdown_client(clp->cl_rpcclient);
320 if (clp->cl_machine_cred != NULL)
321 put_rpccred(clp->cl_machine_cred);
323 put_net(clp->cl_net);
324 kfree(clp->cl_hostname);
327 dprintk("<-- nfs_free_client()\n");
331 * Release a reference to a shared client record
333 void nfs_put_client(struct nfs_client *clp)
340 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
341 nn = net_generic(clp->cl_net, nfs_net_id);
343 if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
344 list_del(&clp->cl_share_link);
345 nfs_cb_idr_remove_locked(clp);
346 spin_unlock(&nn->nfs_client_lock);
348 BUG_ON(!list_empty(&clp->cl_superblocks));
350 clp->rpc_ops->free_client(clp);
353 EXPORT_SYMBOL_GPL(nfs_put_client);
355 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
357 * Test if two ip6 socket addresses refer to the same socket by
358 * comparing relevant fields. The padding bytes specifically, are not
359 * compared. sin6_flowinfo is not compared because it only affects QoS
360 * and sin6_scope_id is only compared if the address is "link local"
361 * because "link local" addresses need only be unique to a specific
362 * link. Conversely, ordinary unicast addresses might have different
365 * The caller should ensure both socket addresses are AF_INET6.
367 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
368 const struct sockaddr *sa2)
370 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
371 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
373 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
375 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
376 return sin1->sin6_scope_id == sin2->sin6_scope_id;
380 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
381 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
382 const struct sockaddr *sa2)
389 * Test if two ip4 socket addresses refer to the same socket, by
390 * comparing relevant fields. The padding bytes specifically, are
393 * The caller should ensure both socket addresses are AF_INET.
395 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
396 const struct sockaddr *sa2)
398 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
399 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
401 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
404 static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
405 const struct sockaddr *sa2)
407 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
408 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
410 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
411 (sin1->sin6_port == sin2->sin6_port);
414 static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
415 const struct sockaddr *sa2)
417 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
418 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
420 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
421 (sin1->sin_port == sin2->sin_port);
424 #if defined(CONFIG_NFS_V4_1)
426 * Test if two socket addresses represent the same actual socket,
427 * by comparing (only) relevant fields, excluding the port number.
429 static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
430 const struct sockaddr *sa2)
432 if (sa1->sa_family != sa2->sa_family)
435 switch (sa1->sa_family) {
437 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
439 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
443 #endif /* CONFIG_NFS_V4_1 */
446 * Test if two socket addresses represent the same actual socket,
447 * by comparing (only) relevant fields, including the port number.
449 static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
450 const struct sockaddr *sa2)
452 if (sa1->sa_family != sa2->sa_family)
455 switch (sa1->sa_family) {
457 return nfs_sockaddr_cmp_ip4(sa1, sa2);
459 return nfs_sockaddr_cmp_ip6(sa1, sa2);
464 #if defined(CONFIG_NFS_V4_1)
465 /* Common match routine for v4.0 and v4.1 callback services */
466 static bool nfs4_cb_match_client(const struct sockaddr *addr,
467 struct nfs_client *clp, u32 minorversion)
469 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
471 /* Don't match clients that failed to initialise */
472 if (!(clp->cl_cons_state == NFS_CS_READY ||
473 clp->cl_cons_state == NFS_CS_SESSION_INITING))
478 /* Match the version and minorversion */
479 if (clp->rpc_ops->version != 4 ||
480 clp->cl_minorversion != minorversion)
483 /* Match only the IP address, not the port number */
484 if (!nfs_sockaddr_match_ipaddr(addr, clap))
489 #endif /* CONFIG_NFS_V4_1 */
492 * Find an nfs_client on the list that matches the initialisation data
495 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
497 struct nfs_client *clp;
498 const struct sockaddr *sap = data->addr;
499 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
501 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
502 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
503 /* Don't match clients that failed to initialise properly */
504 if (clp->cl_cons_state < 0)
507 /* Different NFS versions cannot share the same nfs_client */
508 if (clp->rpc_ops != data->rpc_ops)
511 if (clp->cl_proto != data->proto)
513 /* Match nfsv4 minorversion */
514 if (clp->cl_minorversion != data->minorversion)
516 /* Match the full socket address */
517 if (!nfs_sockaddr_cmp(sap, clap))
520 atomic_inc(&clp->cl_count);
526 static bool nfs_client_init_is_complete(const struct nfs_client *clp)
528 return clp->cl_cons_state != NFS_CS_INITING;
531 int nfs_wait_client_init_complete(const struct nfs_client *clp)
533 return wait_event_killable(nfs_client_active_wq,
534 nfs_client_init_is_complete(clp));
538 * Found an existing client. Make sure it's ready before returning.
540 static struct nfs_client *
541 nfs_found_client(const struct nfs_client_initdata *cl_init,
542 struct nfs_client *clp)
546 error = nfs_wait_client_init_complete(clp);
549 return ERR_PTR(-ERESTARTSYS);
552 if (clp->cl_cons_state < NFS_CS_READY) {
553 error = clp->cl_cons_state;
555 return ERR_PTR(error);
560 dprintk("<-- %s found nfs_client %p for %s\n",
561 __func__, clp, cl_init->hostname ?: "");
566 * Look up a client by IP address and protocol version
567 * - creates a new record if one doesn't yet exist
569 static struct nfs_client *
570 nfs_get_client(const struct nfs_client_initdata *cl_init,
571 const struct rpc_timeout *timeparms,
573 rpc_authflavor_t authflavour)
575 struct nfs_client *clp, *new = NULL;
576 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
578 dprintk("--> nfs_get_client(%s,v%u)\n",
579 cl_init->hostname ?: "", cl_init->rpc_ops->version);
581 /* see if the client already exists */
583 spin_lock(&nn->nfs_client_lock);
585 clp = nfs_match_client(cl_init);
587 spin_unlock(&nn->nfs_client_lock);
589 new->rpc_ops->free_client(new);
590 return nfs_found_client(cl_init, clp);
593 list_add(&new->cl_share_link, &nn->nfs_client_list);
594 spin_unlock(&nn->nfs_client_lock);
595 new->cl_flags = cl_init->init_flags;
596 return cl_init->rpc_ops->init_client(new,
601 spin_unlock(&nn->nfs_client_lock);
603 new = cl_init->rpc_ops->alloc_client(cl_init);
604 } while (!IS_ERR(new));
606 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
607 cl_init->hostname ?: "", PTR_ERR(new));
612 * Mark a server as ready or failed
614 void nfs_mark_client_ready(struct nfs_client *clp, int state)
617 clp->cl_cons_state = state;
618 wake_up_all(&nfs_client_active_wq);
622 * Initialise the timeout values for a connection
624 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
625 unsigned int timeo, unsigned int retrans)
627 to->to_initval = timeo * HZ / 10;
628 to->to_retries = retrans;
631 case XPRT_TRANSPORT_TCP:
632 case XPRT_TRANSPORT_RDMA:
633 if (to->to_retries == 0)
634 to->to_retries = NFS_DEF_TCP_RETRANS;
635 if (to->to_initval == 0)
636 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
637 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
638 to->to_initval = NFS_MAX_TCP_TIMEOUT;
639 to->to_increment = to->to_initval;
640 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
641 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
642 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
643 if (to->to_maxval < to->to_initval)
644 to->to_maxval = to->to_initval;
645 to->to_exponential = 0;
647 case XPRT_TRANSPORT_UDP:
648 if (to->to_retries == 0)
649 to->to_retries = NFS_DEF_UDP_RETRANS;
651 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
652 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
653 to->to_initval = NFS_MAX_UDP_TIMEOUT;
654 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
655 to->to_exponential = 1;
663 * Create an RPC client handle
665 static int nfs_create_rpc_client(struct nfs_client *clp,
666 const struct rpc_timeout *timeparms,
667 rpc_authflavor_t flavor)
669 struct rpc_clnt *clnt = NULL;
670 struct rpc_create_args args = {
672 .protocol = clp->cl_proto,
673 .address = (struct sockaddr *)&clp->cl_addr,
674 .addrsize = clp->cl_addrlen,
675 .timeout = timeparms,
676 .servername = clp->cl_hostname,
677 .program = &nfs_program,
678 .version = clp->rpc_ops->version,
679 .authflavor = flavor,
682 if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
683 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
684 if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags))
685 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
687 if (!IS_ERR(clp->cl_rpcclient))
690 clnt = rpc_create(&args);
692 dprintk("%s: cannot create RPC client. Error = %ld\n",
693 __func__, PTR_ERR(clnt));
694 return PTR_ERR(clnt);
697 clp->cl_rpcclient = clnt;
702 * Version 2 or 3 client destruction
704 static void nfs_destroy_server(struct nfs_server *server)
706 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
707 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
708 nlmclnt_done(server->nlm_host);
712 * Version 2 or 3 lockd setup
714 static int nfs_start_lockd(struct nfs_server *server)
716 struct nlm_host *host;
717 struct nfs_client *clp = server->nfs_client;
718 struct nlmclnt_initdata nlm_init = {
719 .hostname = clp->cl_hostname,
720 .address = (struct sockaddr *)&clp->cl_addr,
721 .addrlen = clp->cl_addrlen,
722 .nfs_version = clp->rpc_ops->version,
723 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
728 if (nlm_init.nfs_version > 3)
730 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
731 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
734 switch (clp->cl_proto) {
736 nlm_init.protocol = IPPROTO_TCP;
738 case XPRT_TRANSPORT_UDP:
739 nlm_init.protocol = IPPROTO_UDP;
742 host = nlmclnt_init(&nlm_init);
744 return PTR_ERR(host);
746 server->nlm_host = host;
747 server->destroy = nfs_destroy_server;
752 * Initialise an NFSv3 ACL client connection
754 #ifdef CONFIG_NFS_V3_ACL
755 static void nfs_init_server_aclclient(struct nfs_server *server)
757 if (server->nfs_client->rpc_ops->version != 3)
759 if (server->flags & NFS_MOUNT_NOACL)
762 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
763 if (IS_ERR(server->client_acl))
766 /* No errors! Assume that Sun nfsacls are supported */
767 server->caps |= NFS_CAP_ACLS;
771 server->caps &= ~NFS_CAP_ACLS;
774 static inline void nfs_init_server_aclclient(struct nfs_server *server)
776 server->flags &= ~NFS_MOUNT_NOACL;
777 server->caps &= ~NFS_CAP_ACLS;
782 * Create a general RPC client
784 static int nfs_init_server_rpcclient(struct nfs_server *server,
785 const struct rpc_timeout *timeo,
786 rpc_authflavor_t pseudoflavour)
788 struct nfs_client *clp = server->nfs_client;
790 server->client = rpc_clone_client(clp->cl_rpcclient);
791 if (IS_ERR(server->client)) {
792 dprintk("%s: couldn't create rpc_client!\n", __func__);
793 return PTR_ERR(server->client);
796 memcpy(&server->client->cl_timeout_default,
798 sizeof(server->client->cl_timeout_default));
799 server->client->cl_timeout = &server->client->cl_timeout_default;
801 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
802 struct rpc_auth *auth;
804 auth = rpcauth_create(pseudoflavour, server->client);
806 dprintk("%s: couldn't create credcache!\n", __func__);
807 return PTR_ERR(auth);
810 server->client->cl_softrtry = 0;
811 if (server->flags & NFS_MOUNT_SOFT)
812 server->client->cl_softrtry = 1;
818 * nfs_init_client - Initialise an NFS2 or NFS3 client
820 * @clp: nfs_client to initialise
821 * @timeparms: timeout parameters for underlying RPC transport
822 * @ip_addr: IP presentation address (not used)
823 * @authflavor: authentication flavor for underlying RPC transport
825 * Returns pointer to an NFS client, or an ERR_PTR value.
827 struct nfs_client *nfs_init_client(struct nfs_client *clp,
828 const struct rpc_timeout *timeparms,
829 const char *ip_addr, rpc_authflavor_t authflavour)
833 if (clp->cl_cons_state == NFS_CS_READY) {
834 /* the client is already initialised */
835 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
840 * Create a client RPC handle for doing FSSTAT with UNIX auth only
841 * - RFC 2623, sec 2.3.2
843 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
846 nfs_mark_client_ready(clp, NFS_CS_READY);
850 nfs_mark_client_ready(clp, error);
852 dprintk("<-- nfs_init_client() = xerror %d\n", error);
853 return ERR_PTR(error);
857 * Create a version 2 or 3 client
859 static int nfs_init_server(struct nfs_server *server,
860 const struct nfs_parsed_mount_data *data)
862 struct nfs_client_initdata cl_init = {
863 .hostname = data->nfs_server.hostname,
864 .addr = (const struct sockaddr *)&data->nfs_server.address,
865 .addrlen = data->nfs_server.addrlen,
867 .proto = data->nfs_server.protocol,
870 struct rpc_timeout timeparms;
871 struct nfs_client *clp;
874 dprintk("--> nfs_init_server()\n");
876 switch (data->version) {
879 cl_init.rpc_ops = &nfs_v2_clientops;
884 cl_init.rpc_ops = &nfs_v3_clientops;
888 return -EPROTONOSUPPORT;
891 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
892 data->timeo, data->retrans);
893 if (data->flags & NFS_MOUNT_NORESVPORT)
894 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
896 /* Allocate or find a client reference we can use */
897 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX);
899 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
903 server->nfs_client = clp;
905 /* Initialise the client representation from the mount data */
906 server->flags = data->flags;
907 server->options = data->options;
908 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
909 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
910 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR;
913 server->rsize = nfs_block_size(data->rsize, NULL);
915 server->wsize = nfs_block_size(data->wsize, NULL);
917 server->acregmin = data->acregmin * HZ;
918 server->acregmax = data->acregmax * HZ;
919 server->acdirmin = data->acdirmin * HZ;
920 server->acdirmax = data->acdirmax * HZ;
922 /* Start lockd here, before we might error out */
923 error = nfs_start_lockd(server);
927 server->port = data->nfs_server.port;
929 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
933 /* Preserve the values of mount_server-related mount options */
934 if (data->mount_server.addrlen) {
935 memcpy(&server->mountd_address, &data->mount_server.address,
936 data->mount_server.addrlen);
937 server->mountd_addrlen = data->mount_server.addrlen;
939 server->mountd_version = data->mount_server.version;
940 server->mountd_port = data->mount_server.port;
941 server->mountd_protocol = data->mount_server.protocol;
943 server->namelen = data->namlen;
944 /* Create a client RPC handle for the NFSv3 ACL management interface */
945 nfs_init_server_aclclient(server);
946 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
950 server->nfs_client = NULL;
952 dprintk("<-- nfs_init_server() = xerror %d\n", error);
957 * Load up the server record from information gained in an fsinfo record
959 static void nfs_server_set_fsinfo(struct nfs_server *server,
960 struct nfs_fh *mntfh,
961 struct nfs_fsinfo *fsinfo)
963 unsigned long max_rpc_payload;
965 /* Work out a lot of parameters */
966 if (server->rsize == 0)
967 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
968 if (server->wsize == 0)
969 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
971 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
972 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
973 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
974 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
976 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
977 if (server->rsize > max_rpc_payload)
978 server->rsize = max_rpc_payload;
979 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
980 server->rsize = NFS_MAX_FILE_IO_SIZE;
981 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
983 server->backing_dev_info.name = "nfs";
984 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
986 if (server->wsize > max_rpc_payload)
987 server->wsize = max_rpc_payload;
988 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
989 server->wsize = NFS_MAX_FILE_IO_SIZE;
990 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
991 server->pnfs_blksize = fsinfo->blksize;
993 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
995 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
996 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
997 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
998 if (server->dtsize > server->rsize)
999 server->dtsize = server->rsize;
1001 if (server->flags & NFS_MOUNT_NOAC) {
1002 server->acregmin = server->acregmax = 0;
1003 server->acdirmin = server->acdirmax = 0;
1006 server->maxfilesize = fsinfo->maxfilesize;
1008 server->time_delta = fsinfo->time_delta;
1010 /* We're airborne Set socket buffersize */
1011 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
1015 * Probe filesystem information, including the FSID on v2/v3
1017 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
1019 struct nfs_fsinfo fsinfo;
1020 struct nfs_client *clp = server->nfs_client;
1023 dprintk("--> nfs_probe_fsinfo()\n");
1025 if (clp->rpc_ops->set_capabilities != NULL) {
1026 error = clp->rpc_ops->set_capabilities(server, mntfh);
1031 fsinfo.fattr = fattr;
1032 fsinfo.layouttype = 0;
1033 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
1037 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
1039 /* Get some general file system info */
1040 if (server->namelen == 0) {
1041 struct nfs_pathconf pathinfo;
1043 pathinfo.fattr = fattr;
1044 nfs_fattr_init(fattr);
1046 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
1047 server->namelen = pathinfo.max_namelen;
1050 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1054 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1059 * Copy useful information when duplicating a server record
1061 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1063 target->flags = source->flags;
1064 target->rsize = source->rsize;
1065 target->wsize = source->wsize;
1066 target->acregmin = source->acregmin;
1067 target->acregmax = source->acregmax;
1068 target->acdirmin = source->acdirmin;
1069 target->acdirmax = source->acdirmax;
1070 target->caps = source->caps;
1071 target->options = source->options;
1074 static void nfs_server_insert_lists(struct nfs_server *server)
1076 struct nfs_client *clp = server->nfs_client;
1077 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1079 spin_lock(&nn->nfs_client_lock);
1080 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
1081 list_add_tail(&server->master_link, &nn->nfs_volume_list);
1082 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1083 spin_unlock(&nn->nfs_client_lock);
1087 static void nfs_server_remove_lists(struct nfs_server *server)
1089 struct nfs_client *clp = server->nfs_client;
1094 nn = net_generic(clp->cl_net, nfs_net_id);
1095 spin_lock(&nn->nfs_client_lock);
1096 list_del_rcu(&server->client_link);
1097 if (list_empty(&clp->cl_superblocks))
1098 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1099 list_del(&server->master_link);
1100 spin_unlock(&nn->nfs_client_lock);
1106 * Allocate and initialise a server record
1108 static struct nfs_server *nfs_alloc_server(void)
1110 struct nfs_server *server;
1112 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1116 server->client = server->client_acl = ERR_PTR(-EINVAL);
1118 /* Zero out the NFS state stuff */
1119 INIT_LIST_HEAD(&server->client_link);
1120 INIT_LIST_HEAD(&server->master_link);
1121 INIT_LIST_HEAD(&server->delegations);
1122 INIT_LIST_HEAD(&server->layouts);
1123 INIT_LIST_HEAD(&server->state_owners_lru);
1125 atomic_set(&server->active, 0);
1127 server->io_stats = nfs_alloc_iostats();
1128 if (!server->io_stats) {
1133 if (bdi_init(&server->backing_dev_info)) {
1134 nfs_free_iostats(server->io_stats);
1139 ida_init(&server->openowner_id);
1140 ida_init(&server->lockowner_id);
1141 pnfs_init_server(server);
1147 * Free up a server record
1149 void nfs_free_server(struct nfs_server *server)
1151 dprintk("--> nfs_free_server()\n");
1153 nfs_server_remove_lists(server);
1155 if (server->destroy != NULL)
1156 server->destroy(server);
1158 if (!IS_ERR(server->client_acl))
1159 rpc_shutdown_client(server->client_acl);
1160 if (!IS_ERR(server->client))
1161 rpc_shutdown_client(server->client);
1163 nfs_put_client(server->nfs_client);
1165 ida_destroy(&server->lockowner_id);
1166 ida_destroy(&server->openowner_id);
1167 nfs_free_iostats(server->io_stats);
1168 bdi_destroy(&server->backing_dev_info);
1170 nfs_release_automount_timer();
1171 dprintk("<-- nfs_free_server()\n");
1175 * Create a version 2 or 3 volume record
1176 * - keyed on server and FSID
1178 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1179 struct nfs_fh *mntfh)
1181 struct nfs_server *server;
1182 struct nfs_fattr *fattr;
1185 server = nfs_alloc_server();
1187 return ERR_PTR(-ENOMEM);
1190 fattr = nfs_alloc_fattr();
1194 /* Get a client representation */
1195 error = nfs_init_server(server, data);
1199 BUG_ON(!server->nfs_client);
1200 BUG_ON(!server->nfs_client->rpc_ops);
1201 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1203 /* Probe the root fh to retrieve its FSID */
1204 error = nfs_probe_fsinfo(server, mntfh, fattr);
1207 if (server->nfs_client->rpc_ops->version == 3) {
1208 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1209 server->namelen = NFS3_MAXNAMLEN;
1210 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1211 server->caps |= NFS_CAP_READDIRPLUS;
1213 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1214 server->namelen = NFS2_MAXNAMLEN;
1217 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1218 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
1220 dprintk("nfs_create_server: getattr error = %d\n", -error);
1224 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
1226 dprintk("Server FSID: %llx:%llx\n",
1227 (unsigned long long) server->fsid.major,
1228 (unsigned long long) server->fsid.minor);
1230 nfs_server_insert_lists(server);
1231 server->mount_time = jiffies;
1232 nfs_free_fattr(fattr);
1236 nfs_free_fattr(fattr);
1237 nfs_free_server(server);
1238 return ERR_PTR(error);
1241 #ifdef CONFIG_NFS_V4
1243 * NFSv4.0 callback thread helper
1245 * Find a client by callback identifier
1248 nfs4_find_client_ident(struct net *net, int cb_ident)
1250 struct nfs_client *clp;
1251 struct nfs_net *nn = net_generic(net, nfs_net_id);
1253 spin_lock(&nn->nfs_client_lock);
1254 clp = idr_find(&nn->cb_ident_idr, cb_ident);
1256 atomic_inc(&clp->cl_count);
1257 spin_unlock(&nn->nfs_client_lock);
1261 #if defined(CONFIG_NFS_V4_1)
1263 * NFSv4.1 callback thread helper
1264 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1265 * minorversion, and sessionID
1267 * Returns NULL if no such client
1270 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1271 struct nfs4_sessionid *sid)
1273 struct nfs_client *clp;
1274 struct nfs_net *nn = net_generic(net, nfs_net_id);
1276 spin_lock(&nn->nfs_client_lock);
1277 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
1278 if (nfs4_cb_match_client(addr, clp, 1) == false)
1281 if (!nfs4_has_session(clp))
1284 /* Match sessionid*/
1285 if (memcmp(clp->cl_session->sess_id.data,
1286 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
1289 atomic_inc(&clp->cl_count);
1290 spin_unlock(&nn->nfs_client_lock);
1293 spin_unlock(&nn->nfs_client_lock);
1297 #else /* CONFIG_NFS_V4_1 */
1300 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
1301 struct nfs4_sessionid *sid)
1305 #endif /* CONFIG_NFS_V4_1 */
1308 * Initialize the NFS4 callback service
1310 static int nfs4_init_callback(struct nfs_client *clp)
1314 if (clp->rpc_ops->version == 4) {
1315 struct rpc_xprt *xprt;
1317 xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt);
1319 if (nfs4_has_session(clp)) {
1320 error = xprt_setup_backchannel(xprt,
1321 NFS41_BC_MIN_CALLBACKS);
1326 error = nfs_callback_up(clp->cl_mvops->minor_version, xprt);
1328 dprintk("%s: failed to start callback. Error = %d\n",
1332 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1338 * Initialize the minor version specific parts of an NFS4 client record
1340 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1342 #if defined(CONFIG_NFS_V4_1)
1343 if (clp->cl_mvops->minor_version) {
1344 struct nfs4_session *session = NULL;
1346 * Create the session and mark it expired.
1347 * When a SEQUENCE operation encounters the expired session
1348 * it will do session recovery to initialize it.
1350 session = nfs4_alloc_session(clp);
1354 clp->cl_session = session;
1356 * The create session reply races with the server back
1357 * channel probe. Mark the client NFS_CS_SESSION_INITING
1358 * so that the client back channel can find the
1361 nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING);
1363 #endif /* CONFIG_NFS_V4_1 */
1365 return nfs4_init_callback(clp);
1369 * nfs4_init_client - Initialise an NFS4 client record
1371 * @clp: nfs_client to initialise
1372 * @timeparms: timeout parameters for underlying RPC transport
1373 * @ip_addr: callback IP address in presentation format
1374 * @authflavor: authentication flavor for underlying RPC transport
1376 * Returns pointer to an NFS client, or an ERR_PTR value.
1378 struct nfs_client *nfs4_init_client(struct nfs_client *clp,
1379 const struct rpc_timeout *timeparms,
1380 const char *ip_addr,
1381 rpc_authflavor_t authflavour)
1383 char buf[INET6_ADDRSTRLEN + 1];
1386 if (clp->cl_cons_state == NFS_CS_READY) {
1387 /* the client is initialised already */
1388 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1392 /* Check NFS protocol revision and initialize RPC op vector */
1393 clp->rpc_ops = &nfs_v4_clientops;
1395 __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags);
1396 error = nfs_create_rpc_client(clp, timeparms, authflavour);
1400 /* If no clientaddr= option was specified, find a usable cb address */
1401 if (ip_addr == NULL) {
1402 struct sockaddr_storage cb_addr;
1403 struct sockaddr *sap = (struct sockaddr *)&cb_addr;
1405 error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
1408 error = rpc_ntop(sap, buf, sizeof(buf));
1411 ip_addr = (const char *)buf;
1413 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1415 error = nfs_idmap_new(clp);
1417 dprintk("%s: failed to create idmapper. Error = %d\n",
1421 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1423 error = nfs4_init_client_minor_version(clp);
1427 if (!nfs4_has_session(clp))
1428 nfs_mark_client_ready(clp, NFS_CS_READY);
1432 nfs_mark_client_ready(clp, error);
1433 nfs_put_client(clp);
1434 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1435 return ERR_PTR(error);
1439 * Set up an NFS4 client
1441 static int nfs4_set_client(struct nfs_server *server,
1442 const char *hostname,
1443 const struct sockaddr *addr,
1444 const size_t addrlen,
1445 const char *ip_addr,
1446 rpc_authflavor_t authflavour,
1447 int proto, const struct rpc_timeout *timeparms,
1448 u32 minorversion, struct net *net)
1450 struct nfs_client_initdata cl_init = {
1451 .hostname = hostname,
1454 .rpc_ops = &nfs_v4_clientops,
1456 .minorversion = minorversion,
1459 struct nfs_client *clp;
1462 dprintk("--> nfs4_set_client()\n");
1464 if (server->flags & NFS_MOUNT_NORESVPORT)
1465 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
1467 /* Allocate or find a client reference we can use */
1468 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour);
1470 error = PTR_ERR(clp);
1475 * Query for the lease time on clientid setup or renewal
1477 * Note that this will be set on nfs_clients that were created
1478 * only for the DS role and did not set this bit, but now will
1479 * serve a dual role.
1481 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1483 server->nfs_client = clp;
1484 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1487 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1492 * Set up a pNFS Data Server client.
1494 * Return any existing nfs_client that matches server address,port,version
1497 * For a new nfs_client, use a soft mount (default), a low retrans and a
1498 * low timeout interval so that if a connection is lost, we retry through
1501 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1502 const struct sockaddr *ds_addr, int ds_addrlen,
1503 int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans)
1505 struct nfs_client_initdata cl_init = {
1507 .addrlen = ds_addrlen,
1508 .rpc_ops = &nfs_v4_clientops,
1510 .minorversion = mds_clp->cl_minorversion,
1511 .net = mds_clp->cl_net,
1513 struct rpc_timeout ds_timeout;
1514 struct nfs_client *clp;
1517 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1518 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1519 * (section 13.1 RFC 5661).
1521 nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
1522 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1523 mds_clp->cl_rpcclient->cl_auth->au_flavor);
1525 dprintk("<-- %s %p\n", __func__, clp);
1528 EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
1531 * Session has been established, and the client marked ready.
1532 * Set the mount rsize and wsize with negotiated fore channel
1533 * attributes which will be bound checked in nfs_server_set_fsinfo.
1535 static void nfs4_session_set_rwsize(struct nfs_server *server)
1537 #ifdef CONFIG_NFS_V4_1
1538 struct nfs4_session *sess;
1542 if (!nfs4_has_session(server->nfs_client))
1544 sess = server->nfs_client->cl_session;
1545 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1546 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1548 if (server->rsize > server_resp_sz)
1549 server->rsize = server_resp_sz;
1550 if (server->wsize > server_rqst_sz)
1551 server->wsize = server_rqst_sz;
1552 #endif /* CONFIG_NFS_V4_1 */
1555 static int nfs4_server_common_setup(struct nfs_server *server,
1556 struct nfs_fh *mntfh)
1558 struct nfs_fattr *fattr;
1561 BUG_ON(!server->nfs_client);
1562 BUG_ON(!server->nfs_client->rpc_ops);
1563 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1565 /* data servers support only a subset of NFSv4.1 */
1566 if (is_ds_only_client(server->nfs_client))
1567 return -EPROTONOSUPPORT;
1569 fattr = nfs_alloc_fattr();
1573 /* We must ensure the session is initialised first */
1574 error = nfs4_init_session(server);
1578 /* Probe the root fh to retrieve its FSID and filehandle */
1579 error = nfs4_get_rootfh(server, mntfh);
1583 dprintk("Server FSID: %llx:%llx\n",
1584 (unsigned long long) server->fsid.major,
1585 (unsigned long long) server->fsid.minor);
1586 dprintk("Mount FH: %d\n", mntfh->size);
1588 nfs4_session_set_rwsize(server);
1590 error = nfs_probe_fsinfo(server, mntfh, fattr);
1594 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1595 server->namelen = NFS4_MAXNAMLEN;
1597 nfs_server_insert_lists(server);
1598 server->mount_time = jiffies;
1599 server->destroy = nfs4_destroy_server;
1601 nfs_free_fattr(fattr);
1606 * Create a version 4 volume record
1608 static int nfs4_init_server(struct nfs_server *server,
1609 const struct nfs_parsed_mount_data *data)
1611 struct rpc_timeout timeparms;
1614 dprintk("--> nfs4_init_server()\n");
1616 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1617 data->timeo, data->retrans);
1619 /* Initialise the client representation from the mount data */
1620 server->flags = data->flags;
1621 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1622 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1623 server->caps |= NFS_CAP_READDIRPLUS;
1624 server->options = data->options;
1626 /* Get a client record */
1627 error = nfs4_set_client(server,
1628 data->nfs_server.hostname,
1629 (const struct sockaddr *)&data->nfs_server.address,
1630 data->nfs_server.addrlen,
1631 data->client_address,
1632 data->auth_flavors[0],
1633 data->nfs_server.protocol,
1641 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1644 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1645 server->caps |= NFS_CAP_UIDGID_NOMAP;
1648 server->rsize = nfs_block_size(data->rsize, NULL);
1650 server->wsize = nfs_block_size(data->wsize, NULL);
1652 server->acregmin = data->acregmin * HZ;
1653 server->acregmax = data->acregmax * HZ;
1654 server->acdirmin = data->acdirmin * HZ;
1655 server->acdirmax = data->acdirmax * HZ;
1657 server->port = data->nfs_server.port;
1659 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1663 dprintk("<-- nfs4_init_server() = %d\n", error);
1668 * Create a version 4 volume record
1669 * - keyed on server and FSID
1671 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1672 struct nfs_fh *mntfh)
1674 struct nfs_server *server;
1677 dprintk("--> nfs4_create_server()\n");
1679 server = nfs_alloc_server();
1681 return ERR_PTR(-ENOMEM);
1683 /* set up the general RPC client */
1684 error = nfs4_init_server(server, data);
1688 error = nfs4_server_common_setup(server, mntfh);
1692 dprintk("<-- nfs4_create_server() = %p\n", server);
1696 nfs_free_server(server);
1697 dprintk("<-- nfs4_create_server() = error %d\n", error);
1698 return ERR_PTR(error);
1702 * Create an NFS4 referral server record
1704 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1705 struct nfs_fh *mntfh)
1707 struct nfs_client *parent_client;
1708 struct nfs_server *server, *parent_server;
1711 dprintk("--> nfs4_create_referral_server()\n");
1713 server = nfs_alloc_server();
1715 return ERR_PTR(-ENOMEM);
1717 parent_server = NFS_SB(data->sb);
1718 parent_client = parent_server->nfs_client;
1720 /* Initialise the client representation from the parent server */
1721 nfs_server_copy_userdata(server, parent_server);
1722 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
1724 /* Get a client representation.
1725 * Note: NFSv4 always uses TCP, */
1726 error = nfs4_set_client(server, data->hostname,
1729 parent_client->cl_ipaddr,
1731 rpc_protocol(parent_server->client),
1732 parent_server->client->cl_timeout,
1733 parent_client->cl_mvops->minor_version,
1734 parent_client->cl_net);
1738 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1742 error = nfs4_server_common_setup(server, mntfh);
1746 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1750 nfs_free_server(server);
1751 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1752 return ERR_PTR(error);
1755 #endif /* CONFIG_NFS_V4 */
1758 * Clone an NFS2, NFS3 or NFS4 server record
1760 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1762 struct nfs_fattr *fattr,
1763 rpc_authflavor_t flavor)
1765 struct nfs_server *server;
1766 struct nfs_fattr *fattr_fsinfo;
1769 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1770 (unsigned long long) fattr->fsid.major,
1771 (unsigned long long) fattr->fsid.minor);
1773 server = nfs_alloc_server();
1775 return ERR_PTR(-ENOMEM);
1778 fattr_fsinfo = nfs_alloc_fattr();
1779 if (fattr_fsinfo == NULL)
1780 goto out_free_server;
1782 /* Copy data from the source */
1783 server->nfs_client = source->nfs_client;
1784 server->destroy = source->destroy;
1785 atomic_inc(&server->nfs_client->cl_count);
1786 nfs_server_copy_userdata(server, source);
1788 server->fsid = fattr->fsid;
1790 error = nfs_init_server_rpcclient(server,
1791 source->client->cl_timeout,
1794 goto out_free_server;
1795 if (!IS_ERR(source->client_acl))
1796 nfs_init_server_aclclient(server);
1798 /* probe the filesystem info for this server filesystem */
1799 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1801 goto out_free_server;
1803 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1804 server->namelen = NFS4_MAXNAMLEN;
1806 dprintk("Cloned FSID: %llx:%llx\n",
1807 (unsigned long long) server->fsid.major,
1808 (unsigned long long) server->fsid.minor);
1810 error = nfs_start_lockd(server);
1812 goto out_free_server;
1814 nfs_server_insert_lists(server);
1815 server->mount_time = jiffies;
1817 nfs_free_fattr(fattr_fsinfo);
1818 dprintk("<-- nfs_clone_server() = %p\n", server);
1822 nfs_free_fattr(fattr_fsinfo);
1823 nfs_free_server(server);
1824 dprintk("<-- nfs_clone_server() = error %d\n", error);
1825 return ERR_PTR(error);
1828 void nfs_clients_init(struct net *net)
1830 struct nfs_net *nn = net_generic(net, nfs_net_id);
1832 INIT_LIST_HEAD(&nn->nfs_client_list);
1833 INIT_LIST_HEAD(&nn->nfs_volume_list);
1834 #ifdef CONFIG_NFS_V4
1835 idr_init(&nn->cb_ident_idr);
1837 spin_lock_init(&nn->nfs_client_lock);
1838 nn->boot_time = CURRENT_TIME;
1841 #ifdef CONFIG_PROC_FS
1842 static struct proc_dir_entry *proc_fs_nfs;
1844 static int nfs_server_list_open(struct inode *inode, struct file *file);
1845 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1846 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1847 static void nfs_server_list_stop(struct seq_file *p, void *v);
1848 static int nfs_server_list_show(struct seq_file *m, void *v);
1850 static const struct seq_operations nfs_server_list_ops = {
1851 .start = nfs_server_list_start,
1852 .next = nfs_server_list_next,
1853 .stop = nfs_server_list_stop,
1854 .show = nfs_server_list_show,
1857 static const struct file_operations nfs_server_list_fops = {
1858 .open = nfs_server_list_open,
1860 .llseek = seq_lseek,
1861 .release = seq_release,
1862 .owner = THIS_MODULE,
1865 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1866 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1867 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1868 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1869 static int nfs_volume_list_show(struct seq_file *m, void *v);
1871 static const struct seq_operations nfs_volume_list_ops = {
1872 .start = nfs_volume_list_start,
1873 .next = nfs_volume_list_next,
1874 .stop = nfs_volume_list_stop,
1875 .show = nfs_volume_list_show,
1878 static const struct file_operations nfs_volume_list_fops = {
1879 .open = nfs_volume_list_open,
1881 .llseek = seq_lseek,
1882 .release = seq_release,
1883 .owner = THIS_MODULE,
1887 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1890 static int nfs_server_list_open(struct inode *inode, struct file *file)
1894 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1895 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1897 ret = seq_open(file, &nfs_server_list_ops);
1901 m = file->private_data;
1908 * set up the iterator to start reading from the server list and return the first item
1910 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1912 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1914 /* lock the list against modification */
1915 spin_lock(&nn->nfs_client_lock);
1916 return seq_list_start_head(&nn->nfs_client_list, *_pos);
1920 * move to next server
1922 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1924 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1926 return seq_list_next(v, &nn->nfs_client_list, pos);
1930 * clean up after reading from the transports list
1932 static void nfs_server_list_stop(struct seq_file *p, void *v)
1934 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1936 spin_unlock(&nn->nfs_client_lock);
1940 * display a header line followed by a load of call lines
1942 static int nfs_server_list_show(struct seq_file *m, void *v)
1944 struct nfs_client *clp;
1945 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1947 /* display header on line 1 */
1948 if (v == &nn->nfs_client_list) {
1949 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1953 /* display one transport per line on subsequent lines */
1954 clp = list_entry(v, struct nfs_client, cl_share_link);
1956 /* Check if the client is initialized */
1957 if (clp->cl_cons_state != NFS_CS_READY)
1961 seq_printf(m, "v%u %s %s %3d %s\n",
1962 clp->rpc_ops->version,
1963 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1964 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1965 atomic_read(&clp->cl_count),
1973 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1975 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1979 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1980 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1982 ret = seq_open(file, &nfs_volume_list_ops);
1986 m = file->private_data;
1993 * set up the iterator to start reading from the volume list and return the first item
1995 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1997 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1999 /* lock the list against modification */
2000 spin_lock(&nn->nfs_client_lock);
2001 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
2005 * move to next volume
2007 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
2009 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
2011 return seq_list_next(v, &nn->nfs_volume_list, pos);
2015 * clean up after reading from the transports list
2017 static void nfs_volume_list_stop(struct seq_file *p, void *v)
2019 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
2021 spin_unlock(&nn->nfs_client_lock);
2025 * display a header line followed by a load of call lines
2027 static int nfs_volume_list_show(struct seq_file *m, void *v)
2029 struct nfs_server *server;
2030 struct nfs_client *clp;
2031 char dev[8], fsid[17];
2032 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
2034 /* display header on line 1 */
2035 if (v == &nn->nfs_volume_list) {
2036 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
2039 /* display one transport per line on subsequent lines */
2040 server = list_entry(v, struct nfs_server, master_link);
2041 clp = server->nfs_client;
2043 snprintf(dev, 8, "%u:%u",
2044 MAJOR(server->s_dev), MINOR(server->s_dev));
2046 snprintf(fsid, 17, "%llx:%llx",
2047 (unsigned long long) server->fsid.major,
2048 (unsigned long long) server->fsid.minor);
2051 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
2052 clp->rpc_ops->version,
2053 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
2054 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
2057 nfs_server_fscache_state(server));
2064 * initialise the /proc/fs/nfsfs/ directory
2066 int __init nfs_fs_proc_init(void)
2068 struct proc_dir_entry *p;
2070 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
2074 /* a file of servers with which we're dealing */
2075 p = proc_create("servers", S_IFREG|S_IRUGO,
2076 proc_fs_nfs, &nfs_server_list_fops);
2080 /* a file of volumes that we have mounted */
2081 p = proc_create("volumes", S_IFREG|S_IRUGO,
2082 proc_fs_nfs, &nfs_volume_list_fops);
2088 remove_proc_entry("servers", proc_fs_nfs);
2090 remove_proc_entry("fs/nfsfs", NULL);
2096 * clean up the /proc/fs/nfsfs/ directory
2098 void nfs_fs_proc_exit(void)
2100 remove_proc_entry("volumes", proc_fs_nfs);
2101 remove_proc_entry("servers", proc_fs_nfs);
2102 remove_proc_entry("fs/nfsfs", NULL);
2105 #endif /* CONFIG_PROC_FS */
2107 module_param(nfs4_disable_idmapping, bool, 0644);
2108 MODULE_PARM_DESC(nfs4_disable_idmapping,
2109 "Turn off NFSv4 idmapping when using 'sec=sys'");