1 /* client.c: NFS client sharing and management code
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include <linux/time.h>
17 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/stat.h>
21 #include <linux/errno.h>
22 #include <linux/unistd.h>
23 #include <linux/sunrpc/clnt.h>
24 #include <linux/sunrpc/stats.h>
25 #include <linux/sunrpc/metrics.h>
26 #include <linux/sunrpc/xprtsock.h>
27 #include <linux/sunrpc/xprtrdma.h>
28 #include <linux/nfs_fs.h>
29 #include <linux/nfs_mount.h>
30 #include <linux/nfs4_mount.h>
31 #include <linux/lockd/bind.h>
32 #include <linux/seq_file.h>
33 #include <linux/mount.h>
34 #include <linux/nfs_idmap.h>
35 #include <linux/vfs.h>
36 #include <linux/inet.h>
37 #include <linux/in6.h>
38 #include <linux/slab.h>
40 #include <linux/nfs_xdr.h>
41 #include <linux/sunrpc/bc_xprt.h>
42 #include <linux/nsproxy.h>
43 #include <linux/pid_namespace.h>
45 #include <asm/system.h>
49 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_CLIENT
58 DEFINE_SPINLOCK(nfs_client_lock);
59 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
61 static DEFINE_IDR(cb_ident_idr); /* Protected by nfs_client_lock */
64 * Get a unique NFSv4.0 callback identifier which will be used
65 * by the V4.0 callback service to lookup the nfs_client struct
67 static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
71 if (clp->rpc_ops->version != 4 || minorversion != 0)
74 if (!idr_pre_get(&cb_ident_idr, GFP_KERNEL))
76 spin_lock(&nfs_client_lock);
77 ret = idr_get_new(&cb_ident_idr, clp, &clp->cl_cb_ident);
78 spin_unlock(&nfs_client_lock);
83 #endif /* CONFIG_NFS_V4 */
86 * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
88 static bool nfs4_disable_idmapping = true;
93 static const struct rpc_version *nfs_version[5] = {
103 const struct rpc_program nfs_program = {
105 .number = NFS_PROGRAM,
106 .nrvers = ARRAY_SIZE(nfs_version),
107 .version = nfs_version,
108 .stats = &nfs_rpcstat,
109 .pipe_dir_name = NFS_PIPE_DIRNAME,
112 struct rpc_stat nfs_rpcstat = {
113 .program = &nfs_program
117 #ifdef CONFIG_NFS_V3_ACL
118 static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
119 static const struct rpc_version *nfsacl_version[] = {
120 [3] = &nfsacl_version3,
123 const struct rpc_program nfsacl_program = {
125 .number = NFS_ACL_PROGRAM,
126 .nrvers = ARRAY_SIZE(nfsacl_version),
127 .version = nfsacl_version,
128 .stats = &nfsacl_rpcstat,
130 #endif /* CONFIG_NFS_V3_ACL */
132 struct nfs_client_initdata {
133 const char *hostname;
134 const struct sockaddr *addr;
136 const struct nfs_rpc_ops *rpc_ops;
143 * Allocate a shared client record
145 * Since these are allocated/deallocated very rarely, we don't
146 * bother putting them in a slab cache...
148 static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
150 struct nfs_client *clp;
151 struct rpc_cred *cred;
154 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
157 clp->rpc_ops = cl_init->rpc_ops;
159 atomic_set(&clp->cl_count, 1);
160 clp->cl_cons_state = NFS_CS_INITING;
162 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
163 clp->cl_addrlen = cl_init->addrlen;
165 if (cl_init->hostname) {
167 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
168 if (!clp->cl_hostname)
172 INIT_LIST_HEAD(&clp->cl_superblocks);
173 clp->cl_rpcclient = ERR_PTR(-EINVAL);
175 clp->cl_proto = cl_init->proto;
178 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
182 spin_lock_init(&clp->cl_lock);
183 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
184 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
185 clp->cl_boot_time = CURRENT_TIME;
186 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
187 clp->cl_minorversion = cl_init->minorversion;
188 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
190 cred = rpc_lookup_machine_cred("*");
192 clp->cl_machine_cred = cred;
193 nfs_fscache_get_client_cookie(clp);
194 clp->net = cl_init->net;
205 #ifdef CONFIG_NFS_V4_1
206 static void nfs4_shutdown_session(struct nfs_client *clp)
208 if (nfs4_has_session(clp))
209 nfs4_destroy_session(clp->cl_session);
211 #else /* CONFIG_NFS_V4_1 */
212 static void nfs4_shutdown_session(struct nfs_client *clp)
215 #endif /* CONFIG_NFS_V4_1 */
218 * Destroy the NFS4 callback service
220 static void nfs4_destroy_callback(struct nfs_client *clp)
222 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
223 nfs_callback_down(clp->cl_mvops->minor_version);
226 static void nfs4_shutdown_client(struct nfs_client *clp)
228 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
229 nfs4_kill_renewd(clp);
230 nfs4_shutdown_session(clp);
231 nfs4_destroy_callback(clp);
232 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
233 nfs_idmap_delete(clp);
235 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
238 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
239 void nfs_cleanup_cb_ident_idr(void)
241 idr_destroy(&cb_ident_idr);
244 /* nfs_client_lock held */
245 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
247 if (clp->cl_cb_ident)
248 idr_remove(&cb_ident_idr, clp->cl_cb_ident);
251 static void pnfs_init_server(struct nfs_server *server)
253 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
256 static void nfs4_destroy_server(struct nfs_server *server)
258 nfs4_purge_state_owners(server);
262 static void nfs4_shutdown_client(struct nfs_client *clp)
266 void nfs_cleanup_cb_ident_idr(void)
270 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
274 static void pnfs_init_server(struct nfs_server *server)
278 #endif /* CONFIG_NFS_V4 */
281 * Destroy a shared client record
283 static void nfs_free_client(struct nfs_client *clp)
285 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
287 nfs4_shutdown_client(clp);
289 nfs_fscache_release_client_cookie(clp);
291 /* -EIO all pending I/O */
292 if (!IS_ERR(clp->cl_rpcclient))
293 rpc_shutdown_client(clp->cl_rpcclient);
295 if (clp->cl_machine_cred != NULL)
296 put_rpccred(clp->cl_machine_cred);
298 nfs4_deviceid_purge_client(clp);
300 kfree(clp->cl_hostname);
301 kfree(clp->server_scope);
304 dprintk("<-- nfs_free_client()\n");
308 * Release a reference to a shared client record
310 void nfs_put_client(struct nfs_client *clp)
315 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
317 if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) {
318 list_del(&clp->cl_share_link);
319 nfs_cb_idr_remove_locked(clp);
320 spin_unlock(&nfs_client_lock);
322 BUG_ON(!list_empty(&clp->cl_superblocks));
324 nfs_free_client(clp);
327 EXPORT_SYMBOL_GPL(nfs_put_client);
329 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
331 * Test if two ip6 socket addresses refer to the same socket by
332 * comparing relevant fields. The padding bytes specifically, are not
333 * compared. sin6_flowinfo is not compared because it only affects QoS
334 * and sin6_scope_id is only compared if the address is "link local"
335 * because "link local" addresses need only be unique to a specific
336 * link. Conversely, ordinary unicast addresses might have different
339 * The caller should ensure both socket addresses are AF_INET6.
341 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
342 const struct sockaddr *sa2)
344 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
345 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
347 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
349 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
350 return sin1->sin6_scope_id == sin2->sin6_scope_id;
354 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
355 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
356 const struct sockaddr *sa2)
363 * Test if two ip4 socket addresses refer to the same socket, by
364 * comparing relevant fields. The padding bytes specifically, are
367 * The caller should ensure both socket addresses are AF_INET.
369 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
370 const struct sockaddr *sa2)
372 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
373 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
375 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
378 static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
379 const struct sockaddr *sa2)
381 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
382 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
384 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
385 (sin1->sin6_port == sin2->sin6_port);
388 static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
389 const struct sockaddr *sa2)
391 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
392 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
394 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
395 (sin1->sin_port == sin2->sin_port);
399 * Test if two socket addresses represent the same actual socket,
400 * by comparing (only) relevant fields, excluding the port number.
402 static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
403 const struct sockaddr *sa2)
405 if (sa1->sa_family != sa2->sa_family)
408 switch (sa1->sa_family) {
410 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
412 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
418 * Test if two socket addresses represent the same actual socket,
419 * by comparing (only) relevant fields, including the port number.
421 static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
422 const struct sockaddr *sa2)
424 if (sa1->sa_family != sa2->sa_family)
427 switch (sa1->sa_family) {
429 return nfs_sockaddr_cmp_ip4(sa1, sa2);
431 return nfs_sockaddr_cmp_ip6(sa1, sa2);
436 /* Common match routine for v4.0 and v4.1 callback services */
438 nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp,
441 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
443 /* Don't match clients that failed to initialise */
444 if (!(clp->cl_cons_state == NFS_CS_READY ||
445 clp->cl_cons_state == NFS_CS_SESSION_INITING))
448 /* Match the version and minorversion */
449 if (clp->rpc_ops->version != 4 ||
450 clp->cl_minorversion != minorversion)
453 /* Match only the IP address, not the port number */
454 if (!nfs_sockaddr_match_ipaddr(addr, clap))
461 * Find an nfs_client on the list that matches the initialisation data
464 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
466 struct nfs_client *clp;
467 const struct sockaddr *sap = data->addr;
468 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
470 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
471 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
472 /* Don't match clients that failed to initialise properly */
473 if (clp->cl_cons_state < 0)
476 /* Different NFS versions cannot share the same nfs_client */
477 if (clp->rpc_ops != data->rpc_ops)
480 if (clp->cl_proto != data->proto)
482 /* Match nfsv4 minorversion */
483 if (clp->cl_minorversion != data->minorversion)
485 /* Match the full socket address */
486 if (!nfs_sockaddr_cmp(sap, clap))
489 atomic_inc(&clp->cl_count);
496 * Look up a client by IP address and protocol version
497 * - creates a new record if one doesn't yet exist
499 static struct nfs_client *
500 nfs_get_client(const struct nfs_client_initdata *cl_init,
501 const struct rpc_timeout *timeparms,
503 rpc_authflavor_t authflavour,
506 struct nfs_client *clp, *new = NULL;
508 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
510 dprintk("--> nfs_get_client(%s,v%u)\n",
511 cl_init->hostname ?: "", cl_init->rpc_ops->version);
513 /* see if the client already exists */
515 spin_lock(&nfs_client_lock);
517 clp = nfs_match_client(cl_init);
523 spin_unlock(&nfs_client_lock);
525 new = nfs_alloc_client(cl_init);
526 } while (!IS_ERR(new));
528 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
531 /* install a new client and return with it unready */
534 list_add(&clp->cl_share_link, &nn->nfs_client_list);
535 spin_unlock(&nfs_client_lock);
537 error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
538 authflavour, noresvport);
541 return ERR_PTR(error);
543 dprintk("--> nfs_get_client() = %p [new]\n", clp);
546 /* found an existing client
547 * - make sure it's ready before returning
550 spin_unlock(&nfs_client_lock);
553 nfs_free_client(new);
555 error = wait_event_killable(nfs_client_active_wq,
556 clp->cl_cons_state < NFS_CS_INITING);
559 return ERR_PTR(-ERESTARTSYS);
562 if (clp->cl_cons_state < NFS_CS_READY) {
563 error = clp->cl_cons_state;
565 return ERR_PTR(error);
568 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
570 dprintk("--> nfs_get_client() = %p [share]\n", clp);
575 * Mark a server as ready or failed
577 void nfs_mark_client_ready(struct nfs_client *clp, int state)
579 clp->cl_cons_state = state;
580 wake_up_all(&nfs_client_active_wq);
584 * With sessions, the client is not marked ready until after a
585 * successful EXCHANGE_ID and CREATE_SESSION.
587 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
588 * other versions of NFS can be tried.
590 int nfs4_check_client_ready(struct nfs_client *clp)
592 if (!nfs4_has_session(clp))
594 if (clp->cl_cons_state < NFS_CS_READY)
595 return -EPROTONOSUPPORT;
600 * Initialise the timeout values for a connection
602 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
603 unsigned int timeo, unsigned int retrans)
605 to->to_initval = timeo * HZ / 10;
606 to->to_retries = retrans;
609 case XPRT_TRANSPORT_TCP:
610 case XPRT_TRANSPORT_RDMA:
611 if (to->to_retries == 0)
612 to->to_retries = NFS_DEF_TCP_RETRANS;
613 if (to->to_initval == 0)
614 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
615 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
616 to->to_initval = NFS_MAX_TCP_TIMEOUT;
617 to->to_increment = to->to_initval;
618 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
619 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
620 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
621 if (to->to_maxval < to->to_initval)
622 to->to_maxval = to->to_initval;
623 to->to_exponential = 0;
625 case XPRT_TRANSPORT_UDP:
626 if (to->to_retries == 0)
627 to->to_retries = NFS_DEF_UDP_RETRANS;
629 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
630 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
631 to->to_initval = NFS_MAX_UDP_TIMEOUT;
632 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
633 to->to_exponential = 1;
641 * Create an RPC client handle
643 static int nfs_create_rpc_client(struct nfs_client *clp,
644 const struct rpc_timeout *timeparms,
645 rpc_authflavor_t flavor,
646 int discrtry, int noresvport)
648 struct rpc_clnt *clnt = NULL;
649 struct rpc_create_args args = {
651 .protocol = clp->cl_proto,
652 .address = (struct sockaddr *)&clp->cl_addr,
653 .addrsize = clp->cl_addrlen,
654 .timeout = timeparms,
655 .servername = clp->cl_hostname,
656 .program = &nfs_program,
657 .version = clp->rpc_ops->version,
658 .authflavor = flavor,
662 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
664 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
666 if (!IS_ERR(clp->cl_rpcclient))
669 clnt = rpc_create(&args);
671 dprintk("%s: cannot create RPC client. Error = %ld\n",
672 __func__, PTR_ERR(clnt));
673 return PTR_ERR(clnt);
676 clp->cl_rpcclient = clnt;
681 * Version 2 or 3 client destruction
683 static void nfs_destroy_server(struct nfs_server *server)
685 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
686 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
687 nlmclnt_done(server->nlm_host);
691 * Version 2 or 3 lockd setup
693 static int nfs_start_lockd(struct nfs_server *server)
695 struct nlm_host *host;
696 struct nfs_client *clp = server->nfs_client;
697 struct nlmclnt_initdata nlm_init = {
698 .hostname = clp->cl_hostname,
699 .address = (struct sockaddr *)&clp->cl_addr,
700 .addrlen = clp->cl_addrlen,
701 .nfs_version = clp->rpc_ops->version,
702 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
706 if (nlm_init.nfs_version > 3)
708 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
709 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
712 switch (clp->cl_proto) {
714 nlm_init.protocol = IPPROTO_TCP;
716 case XPRT_TRANSPORT_UDP:
717 nlm_init.protocol = IPPROTO_UDP;
720 host = nlmclnt_init(&nlm_init);
722 return PTR_ERR(host);
724 server->nlm_host = host;
725 server->destroy = nfs_destroy_server;
730 * Initialise an NFSv3 ACL client connection
732 #ifdef CONFIG_NFS_V3_ACL
733 static void nfs_init_server_aclclient(struct nfs_server *server)
735 if (server->nfs_client->rpc_ops->version != 3)
737 if (server->flags & NFS_MOUNT_NOACL)
740 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
741 if (IS_ERR(server->client_acl))
744 /* No errors! Assume that Sun nfsacls are supported */
745 server->caps |= NFS_CAP_ACLS;
749 server->caps &= ~NFS_CAP_ACLS;
752 static inline void nfs_init_server_aclclient(struct nfs_server *server)
754 server->flags &= ~NFS_MOUNT_NOACL;
755 server->caps &= ~NFS_CAP_ACLS;
760 * Create a general RPC client
762 static int nfs_init_server_rpcclient(struct nfs_server *server,
763 const struct rpc_timeout *timeo,
764 rpc_authflavor_t pseudoflavour)
766 struct nfs_client *clp = server->nfs_client;
768 server->client = rpc_clone_client(clp->cl_rpcclient);
769 if (IS_ERR(server->client)) {
770 dprintk("%s: couldn't create rpc_client!\n", __func__);
771 return PTR_ERR(server->client);
774 memcpy(&server->client->cl_timeout_default,
776 sizeof(server->client->cl_timeout_default));
777 server->client->cl_timeout = &server->client->cl_timeout_default;
779 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
780 struct rpc_auth *auth;
782 auth = rpcauth_create(pseudoflavour, server->client);
784 dprintk("%s: couldn't create credcache!\n", __func__);
785 return PTR_ERR(auth);
788 server->client->cl_softrtry = 0;
789 if (server->flags & NFS_MOUNT_SOFT)
790 server->client->cl_softrtry = 1;
796 * Initialise an NFS2 or NFS3 client
798 int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
799 const char *ip_addr, rpc_authflavor_t authflavour,
804 if (clp->cl_cons_state == NFS_CS_READY) {
805 /* the client is already initialised */
806 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
811 * Create a client RPC handle for doing FSSTAT with UNIX auth only
812 * - RFC 2623, sec 2.3.2
814 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
818 nfs_mark_client_ready(clp, NFS_CS_READY);
822 nfs_mark_client_ready(clp, error);
823 dprintk("<-- nfs_init_client() = xerror %d\n", error);
828 * Create a version 2 or 3 client
830 static int nfs_init_server(struct nfs_server *server,
831 const struct nfs_parsed_mount_data *data)
833 struct nfs_client_initdata cl_init = {
834 .hostname = data->nfs_server.hostname,
835 .addr = (const struct sockaddr *)&data->nfs_server.address,
836 .addrlen = data->nfs_server.addrlen,
837 .rpc_ops = &nfs_v2_clientops,
838 .proto = data->nfs_server.protocol,
841 struct rpc_timeout timeparms;
842 struct nfs_client *clp;
845 dprintk("--> nfs_init_server()\n");
848 if (data->version == 3)
849 cl_init.rpc_ops = &nfs_v3_clientops;
852 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
853 data->timeo, data->retrans);
855 /* Allocate or find a client reference we can use */
856 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX,
857 data->flags & NFS_MOUNT_NORESVPORT);
859 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
863 server->nfs_client = clp;
865 /* Initialise the client representation from the mount data */
866 server->flags = data->flags;
867 server->options = data->options;
868 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
869 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
870 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
873 server->rsize = nfs_block_size(data->rsize, NULL);
875 server->wsize = nfs_block_size(data->wsize, NULL);
877 server->acregmin = data->acregmin * HZ;
878 server->acregmax = data->acregmax * HZ;
879 server->acdirmin = data->acdirmin * HZ;
880 server->acdirmax = data->acdirmax * HZ;
882 /* Start lockd here, before we might error out */
883 error = nfs_start_lockd(server);
887 server->port = data->nfs_server.port;
889 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
893 /* Preserve the values of mount_server-related mount options */
894 if (data->mount_server.addrlen) {
895 memcpy(&server->mountd_address, &data->mount_server.address,
896 data->mount_server.addrlen);
897 server->mountd_addrlen = data->mount_server.addrlen;
899 server->mountd_version = data->mount_server.version;
900 server->mountd_port = data->mount_server.port;
901 server->mountd_protocol = data->mount_server.protocol;
903 server->namelen = data->namlen;
904 /* Create a client RPC handle for the NFSv3 ACL management interface */
905 nfs_init_server_aclclient(server);
906 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
910 server->nfs_client = NULL;
912 dprintk("<-- nfs_init_server() = xerror %d\n", error);
917 * Load up the server record from information gained in an fsinfo record
919 static void nfs_server_set_fsinfo(struct nfs_server *server,
920 struct nfs_fh *mntfh,
921 struct nfs_fsinfo *fsinfo)
923 unsigned long max_rpc_payload;
925 /* Work out a lot of parameters */
926 if (server->rsize == 0)
927 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
928 if (server->wsize == 0)
929 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
931 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
932 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
933 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
934 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
936 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
937 if (server->rsize > max_rpc_payload)
938 server->rsize = max_rpc_payload;
939 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
940 server->rsize = NFS_MAX_FILE_IO_SIZE;
941 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
943 server->backing_dev_info.name = "nfs";
944 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
946 if (server->wsize > max_rpc_payload)
947 server->wsize = max_rpc_payload;
948 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
949 server->wsize = NFS_MAX_FILE_IO_SIZE;
950 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
951 server->pnfs_blksize = fsinfo->blksize;
952 set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
954 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
956 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
957 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
958 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
959 if (server->dtsize > server->rsize)
960 server->dtsize = server->rsize;
962 if (server->flags & NFS_MOUNT_NOAC) {
963 server->acregmin = server->acregmax = 0;
964 server->acdirmin = server->acdirmax = 0;
967 server->maxfilesize = fsinfo->maxfilesize;
969 server->time_delta = fsinfo->time_delta;
971 /* We're airborne Set socket buffersize */
972 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
976 * Probe filesystem information, including the FSID on v2/v3
978 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
980 struct nfs_fsinfo fsinfo;
981 struct nfs_client *clp = server->nfs_client;
984 dprintk("--> nfs_probe_fsinfo()\n");
986 if (clp->rpc_ops->set_capabilities != NULL) {
987 error = clp->rpc_ops->set_capabilities(server, mntfh);
992 fsinfo.fattr = fattr;
993 fsinfo.layouttype = 0;
994 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
998 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
1000 /* Get some general file system info */
1001 if (server->namelen == 0) {
1002 struct nfs_pathconf pathinfo;
1004 pathinfo.fattr = fattr;
1005 nfs_fattr_init(fattr);
1007 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
1008 server->namelen = pathinfo.max_namelen;
1011 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1015 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1020 * Copy useful information when duplicating a server record
1022 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1024 target->flags = source->flags;
1025 target->rsize = source->rsize;
1026 target->wsize = source->wsize;
1027 target->acregmin = source->acregmin;
1028 target->acregmax = source->acregmax;
1029 target->acdirmin = source->acdirmin;
1030 target->acdirmax = source->acdirmax;
1031 target->caps = source->caps;
1032 target->options = source->options;
1035 static void nfs_server_insert_lists(struct nfs_server *server)
1037 struct nfs_client *clp = server->nfs_client;
1038 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
1040 spin_lock(&nfs_client_lock);
1041 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
1042 list_add_tail(&server->master_link, &nn->nfs_volume_list);
1043 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1044 spin_unlock(&nfs_client_lock);
1048 static void nfs_server_remove_lists(struct nfs_server *server)
1050 struct nfs_client *clp = server->nfs_client;
1052 spin_lock(&nfs_client_lock);
1053 list_del_rcu(&server->client_link);
1054 if (clp && list_empty(&clp->cl_superblocks))
1055 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1056 list_del(&server->master_link);
1057 spin_unlock(&nfs_client_lock);
1063 * Allocate and initialise a server record
1065 static struct nfs_server *nfs_alloc_server(void)
1067 struct nfs_server *server;
1069 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1073 server->client = server->client_acl = ERR_PTR(-EINVAL);
1075 /* Zero out the NFS state stuff */
1076 INIT_LIST_HEAD(&server->client_link);
1077 INIT_LIST_HEAD(&server->master_link);
1078 INIT_LIST_HEAD(&server->delegations);
1079 INIT_LIST_HEAD(&server->layouts);
1080 INIT_LIST_HEAD(&server->state_owners_lru);
1082 atomic_set(&server->active, 0);
1084 server->io_stats = nfs_alloc_iostats();
1085 if (!server->io_stats) {
1090 if (bdi_init(&server->backing_dev_info)) {
1091 nfs_free_iostats(server->io_stats);
1096 ida_init(&server->openowner_id);
1097 ida_init(&server->lockowner_id);
1098 pnfs_init_server(server);
1104 * Free up a server record
1106 void nfs_free_server(struct nfs_server *server)
1108 dprintk("--> nfs_free_server()\n");
1110 nfs_server_remove_lists(server);
1111 unset_pnfs_layoutdriver(server);
1113 if (server->destroy != NULL)
1114 server->destroy(server);
1116 if (!IS_ERR(server->client_acl))
1117 rpc_shutdown_client(server->client_acl);
1118 if (!IS_ERR(server->client))
1119 rpc_shutdown_client(server->client);
1121 nfs_put_client(server->nfs_client);
1123 ida_destroy(&server->lockowner_id);
1124 ida_destroy(&server->openowner_id);
1125 nfs_free_iostats(server->io_stats);
1126 bdi_destroy(&server->backing_dev_info);
1128 nfs_release_automount_timer();
1129 dprintk("<-- nfs_free_server()\n");
1133 * Create a version 2 or 3 volume record
1134 * - keyed on server and FSID
1136 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1137 struct nfs_fh *mntfh)
1139 struct nfs_server *server;
1140 struct nfs_fattr *fattr;
1143 server = nfs_alloc_server();
1145 return ERR_PTR(-ENOMEM);
1148 fattr = nfs_alloc_fattr();
1152 /* Get a client representation */
1153 error = nfs_init_server(server, data);
1157 BUG_ON(!server->nfs_client);
1158 BUG_ON(!server->nfs_client->rpc_ops);
1159 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1161 /* Probe the root fh to retrieve its FSID */
1162 error = nfs_probe_fsinfo(server, mntfh, fattr);
1165 if (server->nfs_client->rpc_ops->version == 3) {
1166 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1167 server->namelen = NFS3_MAXNAMLEN;
1168 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1169 server->caps |= NFS_CAP_READDIRPLUS;
1171 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1172 server->namelen = NFS2_MAXNAMLEN;
1175 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1176 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
1178 dprintk("nfs_create_server: getattr error = %d\n", -error);
1182 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
1184 dprintk("Server FSID: %llx:%llx\n",
1185 (unsigned long long) server->fsid.major,
1186 (unsigned long long) server->fsid.minor);
1188 nfs_server_insert_lists(server);
1189 server->mount_time = jiffies;
1190 nfs_free_fattr(fattr);
1194 nfs_free_fattr(fattr);
1195 nfs_free_server(server);
1196 return ERR_PTR(error);
1199 #ifdef CONFIG_NFS_V4
1201 * NFSv4.0 callback thread helper
1203 * Find a client by callback identifier
1206 nfs4_find_client_ident(int cb_ident)
1208 struct nfs_client *clp;
1210 spin_lock(&nfs_client_lock);
1211 clp = idr_find(&cb_ident_idr, cb_ident);
1213 atomic_inc(&clp->cl_count);
1214 spin_unlock(&nfs_client_lock);
1218 #if defined(CONFIG_NFS_V4_1)
1220 * NFSv4.1 callback thread helper
1221 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1222 * minorversion, and sessionID
1224 * Returns NULL if no such client
1227 nfs4_find_client_sessionid(const struct sockaddr *addr,
1228 struct nfs4_sessionid *sid)
1230 struct nfs_client *clp;
1231 struct nfs_net *nn = net_generic(&init_net, nfs_net_id);
1233 spin_lock(&nfs_client_lock);
1234 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
1235 if (nfs4_cb_match_client(addr, clp, 1) == false)
1238 if (!nfs4_has_session(clp))
1241 /* Match sessionid*/
1242 if (memcmp(clp->cl_session->sess_id.data,
1243 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
1246 atomic_inc(&clp->cl_count);
1247 spin_unlock(&nfs_client_lock);
1250 spin_unlock(&nfs_client_lock);
1254 #else /* CONFIG_NFS_V4_1 */
1257 nfs4_find_client_sessionid(const struct sockaddr *addr,
1258 struct nfs4_sessionid *sid)
1262 #endif /* CONFIG_NFS_V4_1 */
1265 * Initialize the NFS4 callback service
1267 static int nfs4_init_callback(struct nfs_client *clp)
1271 if (clp->rpc_ops->version == 4) {
1272 if (nfs4_has_session(clp)) {
1273 error = xprt_setup_backchannel(
1274 clp->cl_rpcclient->cl_xprt,
1275 NFS41_BC_MIN_CALLBACKS);
1280 error = nfs_callback_up(clp->cl_mvops->minor_version,
1281 clp->cl_rpcclient->cl_xprt);
1283 dprintk("%s: failed to start callback. Error = %d\n",
1287 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1293 * Initialize the minor version specific parts of an NFS4 client record
1295 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1297 #if defined(CONFIG_NFS_V4_1)
1298 if (clp->cl_mvops->minor_version) {
1299 struct nfs4_session *session = NULL;
1301 * Create the session and mark it expired.
1302 * When a SEQUENCE operation encounters the expired session
1303 * it will do session recovery to initialize it.
1305 session = nfs4_alloc_session(clp);
1309 clp->cl_session = session;
1311 * The create session reply races with the server back
1312 * channel probe. Mark the client NFS_CS_SESSION_INITING
1313 * so that the client back channel can find the
1316 clp->cl_cons_state = NFS_CS_SESSION_INITING;
1318 #endif /* CONFIG_NFS_V4_1 */
1320 return nfs4_init_callback(clp);
1324 * Initialise an NFS4 client record
1326 int nfs4_init_client(struct nfs_client *clp,
1327 const struct rpc_timeout *timeparms,
1328 const char *ip_addr,
1329 rpc_authflavor_t authflavour,
1334 if (clp->cl_cons_state == NFS_CS_READY) {
1335 /* the client is initialised already */
1336 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1340 /* Check NFS protocol revision and initialize RPC op vector */
1341 clp->rpc_ops = &nfs_v4_clientops;
1343 error = nfs_create_rpc_client(clp, timeparms, authflavour,
1347 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1349 error = nfs_idmap_new(clp);
1351 dprintk("%s: failed to create idmapper. Error = %d\n",
1355 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1357 error = nfs4_init_client_minor_version(clp);
1361 if (!nfs4_has_session(clp))
1362 nfs_mark_client_ready(clp, NFS_CS_READY);
1366 nfs_mark_client_ready(clp, error);
1367 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1372 * Set up an NFS4 client
1374 static int nfs4_set_client(struct nfs_server *server,
1375 const char *hostname,
1376 const struct sockaddr *addr,
1377 const size_t addrlen,
1378 const char *ip_addr,
1379 rpc_authflavor_t authflavour,
1380 int proto, const struct rpc_timeout *timeparms,
1381 u32 minorversion, struct net *net)
1383 struct nfs_client_initdata cl_init = {
1384 .hostname = hostname,
1387 .rpc_ops = &nfs_v4_clientops,
1389 .minorversion = minorversion,
1392 struct nfs_client *clp;
1395 dprintk("--> nfs4_set_client()\n");
1397 /* Allocate or find a client reference we can use */
1398 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour,
1399 server->flags & NFS_MOUNT_NORESVPORT);
1401 error = PTR_ERR(clp);
1406 * Query for the lease time on clientid setup or renewal
1408 * Note that this will be set on nfs_clients that were created
1409 * only for the DS role and did not set this bit, but now will
1410 * serve a dual role.
1412 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1414 server->nfs_client = clp;
1415 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1418 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1423 * Set up a pNFS Data Server client.
1425 * Return any existing nfs_client that matches server address,port,version
1428 * For a new nfs_client, use a soft mount (default), a low retrans and a
1429 * low timeout interval so that if a connection is lost, we retry through
1432 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1433 const struct sockaddr *ds_addr,
1434 int ds_addrlen, int ds_proto)
1436 struct nfs_client_initdata cl_init = {
1438 .addrlen = ds_addrlen,
1439 .rpc_ops = &nfs_v4_clientops,
1441 .minorversion = mds_clp->cl_minorversion,
1442 .net = mds_clp->net,
1444 struct rpc_timeout ds_timeout = {
1445 .to_initval = 15 * HZ,
1446 .to_maxval = 15 * HZ,
1448 .to_exponential = 1,
1450 struct nfs_client *clp;
1453 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1454 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1455 * (section 13.1 RFC 5661).
1457 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1458 mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
1460 dprintk("<-- %s %p\n", __func__, clp);
1463 EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
1466 * Session has been established, and the client marked ready.
1467 * Set the mount rsize and wsize with negotiated fore channel
1468 * attributes which will be bound checked in nfs_server_set_fsinfo.
1470 static void nfs4_session_set_rwsize(struct nfs_server *server)
1472 #ifdef CONFIG_NFS_V4_1
1473 struct nfs4_session *sess;
1477 if (!nfs4_has_session(server->nfs_client))
1479 sess = server->nfs_client->cl_session;
1480 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1481 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1483 if (server->rsize > server_resp_sz)
1484 server->rsize = server_resp_sz;
1485 if (server->wsize > server_rqst_sz)
1486 server->wsize = server_rqst_sz;
1487 #endif /* CONFIG_NFS_V4_1 */
1490 static int nfs4_server_common_setup(struct nfs_server *server,
1491 struct nfs_fh *mntfh)
1493 struct nfs_fattr *fattr;
1496 BUG_ON(!server->nfs_client);
1497 BUG_ON(!server->nfs_client->rpc_ops);
1498 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1500 /* data servers support only a subset of NFSv4.1 */
1501 if (is_ds_only_client(server->nfs_client))
1502 return -EPROTONOSUPPORT;
1504 fattr = nfs_alloc_fattr();
1508 /* We must ensure the session is initialised first */
1509 error = nfs4_init_session(server);
1513 /* Probe the root fh to retrieve its FSID and filehandle */
1514 error = nfs4_get_rootfh(server, mntfh);
1518 dprintk("Server FSID: %llx:%llx\n",
1519 (unsigned long long) server->fsid.major,
1520 (unsigned long long) server->fsid.minor);
1521 dprintk("Mount FH: %d\n", mntfh->size);
1523 nfs4_session_set_rwsize(server);
1525 error = nfs_probe_fsinfo(server, mntfh, fattr);
1529 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1530 server->namelen = NFS4_MAXNAMLEN;
1532 nfs_server_insert_lists(server);
1533 server->mount_time = jiffies;
1534 server->destroy = nfs4_destroy_server;
1536 nfs_free_fattr(fattr);
1541 * Create a version 4 volume record
1543 static int nfs4_init_server(struct nfs_server *server,
1544 const struct nfs_parsed_mount_data *data)
1546 struct rpc_timeout timeparms;
1549 dprintk("--> nfs4_init_server()\n");
1551 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1552 data->timeo, data->retrans);
1554 /* Initialise the client representation from the mount data */
1555 server->flags = data->flags;
1556 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1557 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1558 server->caps |= NFS_CAP_READDIRPLUS;
1559 server->options = data->options;
1561 /* Get a client record */
1562 error = nfs4_set_client(server,
1563 data->nfs_server.hostname,
1564 (const struct sockaddr *)&data->nfs_server.address,
1565 data->nfs_server.addrlen,
1566 data->client_address,
1567 data->auth_flavors[0],
1568 data->nfs_server.protocol,
1576 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1579 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1580 server->caps |= NFS_CAP_UIDGID_NOMAP;
1583 server->rsize = nfs_block_size(data->rsize, NULL);
1585 server->wsize = nfs_block_size(data->wsize, NULL);
1587 server->acregmin = data->acregmin * HZ;
1588 server->acregmax = data->acregmax * HZ;
1589 server->acdirmin = data->acdirmin * HZ;
1590 server->acdirmax = data->acdirmax * HZ;
1592 server->port = data->nfs_server.port;
1594 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1598 dprintk("<-- nfs4_init_server() = %d\n", error);
1603 * Create a version 4 volume record
1604 * - keyed on server and FSID
1606 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1607 struct nfs_fh *mntfh)
1609 struct nfs_server *server;
1612 dprintk("--> nfs4_create_server()\n");
1614 server = nfs_alloc_server();
1616 return ERR_PTR(-ENOMEM);
1618 /* set up the general RPC client */
1619 error = nfs4_init_server(server, data);
1623 error = nfs4_server_common_setup(server, mntfh);
1627 dprintk("<-- nfs4_create_server() = %p\n", server);
1631 nfs_free_server(server);
1632 dprintk("<-- nfs4_create_server() = error %d\n", error);
1633 return ERR_PTR(error);
1637 * Create an NFS4 referral server record
1639 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1640 struct nfs_fh *mntfh)
1642 struct nfs_client *parent_client;
1643 struct nfs_server *server, *parent_server;
1646 dprintk("--> nfs4_create_referral_server()\n");
1648 server = nfs_alloc_server();
1650 return ERR_PTR(-ENOMEM);
1652 parent_server = NFS_SB(data->sb);
1653 parent_client = parent_server->nfs_client;
1655 /* Initialise the client representation from the parent server */
1656 nfs_server_copy_userdata(server, parent_server);
1657 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
1659 /* Get a client representation.
1660 * Note: NFSv4 always uses TCP, */
1661 error = nfs4_set_client(server, data->hostname,
1664 parent_client->cl_ipaddr,
1666 parent_server->client->cl_xprt->prot,
1667 parent_server->client->cl_timeout,
1668 parent_client->cl_mvops->minor_version,
1669 parent_client->net);
1673 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1677 error = nfs4_server_common_setup(server, mntfh);
1681 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1685 nfs_free_server(server);
1686 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1687 return ERR_PTR(error);
1690 #endif /* CONFIG_NFS_V4 */
1693 * Clone an NFS2, NFS3 or NFS4 server record
1695 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1697 struct nfs_fattr *fattr)
1699 struct nfs_server *server;
1700 struct nfs_fattr *fattr_fsinfo;
1703 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1704 (unsigned long long) fattr->fsid.major,
1705 (unsigned long long) fattr->fsid.minor);
1707 server = nfs_alloc_server();
1709 return ERR_PTR(-ENOMEM);
1712 fattr_fsinfo = nfs_alloc_fattr();
1713 if (fattr_fsinfo == NULL)
1714 goto out_free_server;
1716 /* Copy data from the source */
1717 server->nfs_client = source->nfs_client;
1718 server->destroy = source->destroy;
1719 atomic_inc(&server->nfs_client->cl_count);
1720 nfs_server_copy_userdata(server, source);
1722 server->fsid = fattr->fsid;
1724 error = nfs_init_server_rpcclient(server,
1725 source->client->cl_timeout,
1726 source->client->cl_auth->au_flavor);
1728 goto out_free_server;
1729 if (!IS_ERR(source->client_acl))
1730 nfs_init_server_aclclient(server);
1732 /* probe the filesystem info for this server filesystem */
1733 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1735 goto out_free_server;
1737 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1738 server->namelen = NFS4_MAXNAMLEN;
1740 dprintk("Cloned FSID: %llx:%llx\n",
1741 (unsigned long long) server->fsid.major,
1742 (unsigned long long) server->fsid.minor);
1744 error = nfs_start_lockd(server);
1746 goto out_free_server;
1748 nfs_server_insert_lists(server);
1749 server->mount_time = jiffies;
1751 nfs_free_fattr(fattr_fsinfo);
1752 dprintk("<-- nfs_clone_server() = %p\n", server);
1756 nfs_free_fattr(fattr_fsinfo);
1757 nfs_free_server(server);
1758 dprintk("<-- nfs_clone_server() = error %d\n", error);
1759 return ERR_PTR(error);
1762 void nfs_clients_init(struct net *net)
1764 struct nfs_net *nn = net_generic(net, nfs_net_id);
1766 INIT_LIST_HEAD(&nn->nfs_client_list);
1767 INIT_LIST_HEAD(&nn->nfs_volume_list);
1770 #ifdef CONFIG_PROC_FS
1771 static struct proc_dir_entry *proc_fs_nfs;
1773 static int nfs_server_list_open(struct inode *inode, struct file *file);
1774 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1775 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1776 static void nfs_server_list_stop(struct seq_file *p, void *v);
1777 static int nfs_server_list_show(struct seq_file *m, void *v);
1779 static const struct seq_operations nfs_server_list_ops = {
1780 .start = nfs_server_list_start,
1781 .next = nfs_server_list_next,
1782 .stop = nfs_server_list_stop,
1783 .show = nfs_server_list_show,
1786 static const struct file_operations nfs_server_list_fops = {
1787 .open = nfs_server_list_open,
1789 .llseek = seq_lseek,
1790 .release = seq_release,
1791 .owner = THIS_MODULE,
1794 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1795 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1796 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1797 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1798 static int nfs_volume_list_show(struct seq_file *m, void *v);
1800 static const struct seq_operations nfs_volume_list_ops = {
1801 .start = nfs_volume_list_start,
1802 .next = nfs_volume_list_next,
1803 .stop = nfs_volume_list_stop,
1804 .show = nfs_volume_list_show,
1807 static const struct file_operations nfs_volume_list_fops = {
1808 .open = nfs_volume_list_open,
1810 .llseek = seq_lseek,
1811 .release = seq_release,
1812 .owner = THIS_MODULE,
1816 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1819 static int nfs_server_list_open(struct inode *inode, struct file *file)
1823 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1824 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1826 ret = seq_open(file, &nfs_server_list_ops);
1830 m = file->private_data;
1837 * set up the iterator to start reading from the server list and return the first item
1839 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1841 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1843 /* lock the list against modification */
1844 spin_lock(&nfs_client_lock);
1845 return seq_list_start_head(&nn->nfs_client_list, *_pos);
1849 * move to next server
1851 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1853 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1855 return seq_list_next(v, &nn->nfs_client_list, pos);
1859 * clean up after reading from the transports list
1861 static void nfs_server_list_stop(struct seq_file *p, void *v)
1863 spin_unlock(&nfs_client_lock);
1867 * display a header line followed by a load of call lines
1869 static int nfs_server_list_show(struct seq_file *m, void *v)
1871 struct nfs_client *clp;
1872 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1874 /* display header on line 1 */
1875 if (v == &nn->nfs_client_list) {
1876 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1880 /* display one transport per line on subsequent lines */
1881 clp = list_entry(v, struct nfs_client, cl_share_link);
1883 /* Check if the client is initialized */
1884 if (clp->cl_cons_state != NFS_CS_READY)
1887 seq_printf(m, "v%u %s %s %3d %s\n",
1888 clp->rpc_ops->version,
1889 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1890 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1891 atomic_read(&clp->cl_count),
1898 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1900 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1904 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1905 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
1907 ret = seq_open(file, &nfs_volume_list_ops);
1911 m = file->private_data;
1918 * set up the iterator to start reading from the volume list and return the first item
1920 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1922 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1924 /* lock the list against modification */
1925 spin_lock(&nfs_client_lock);
1926 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
1930 * move to next volume
1932 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1934 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1936 return seq_list_next(v, &nn->nfs_volume_list, pos);
1940 * clean up after reading from the transports list
1942 static void nfs_volume_list_stop(struct seq_file *p, void *v)
1944 spin_unlock(&nfs_client_lock);
1948 * display a header line followed by a load of call lines
1950 static int nfs_volume_list_show(struct seq_file *m, void *v)
1952 struct nfs_server *server;
1953 struct nfs_client *clp;
1954 char dev[8], fsid[17];
1955 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1957 /* display header on line 1 */
1958 if (v == &nn->nfs_volume_list) {
1959 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
1962 /* display one transport per line on subsequent lines */
1963 server = list_entry(v, struct nfs_server, master_link);
1964 clp = server->nfs_client;
1966 snprintf(dev, 8, "%u:%u",
1967 MAJOR(server->s_dev), MINOR(server->s_dev));
1969 snprintf(fsid, 17, "%llx:%llx",
1970 (unsigned long long) server->fsid.major,
1971 (unsigned long long) server->fsid.minor);
1973 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
1974 clp->rpc_ops->version,
1975 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1976 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1979 nfs_server_fscache_state(server));
1985 * initialise the /proc/fs/nfsfs/ directory
1987 int __init nfs_fs_proc_init(void)
1989 struct proc_dir_entry *p;
1991 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
1995 /* a file of servers with which we're dealing */
1996 p = proc_create("servers", S_IFREG|S_IRUGO,
1997 proc_fs_nfs, &nfs_server_list_fops);
2001 /* a file of volumes that we have mounted */
2002 p = proc_create("volumes", S_IFREG|S_IRUGO,
2003 proc_fs_nfs, &nfs_volume_list_fops);
2009 remove_proc_entry("servers", proc_fs_nfs);
2011 remove_proc_entry("fs/nfsfs", NULL);
2017 * clean up the /proc/fs/nfsfs/ directory
2019 void nfs_fs_proc_exit(void)
2021 remove_proc_entry("volumes", proc_fs_nfs);
2022 remove_proc_entry("servers", proc_fs_nfs);
2023 remove_proc_entry("fs/nfsfs", NULL);
2026 #endif /* CONFIG_PROC_FS */
2028 module_param(nfs4_disable_idmapping, bool, 0644);
2029 MODULE_PARM_DESC(nfs4_disable_idmapping,
2030 "Turn off NFSv4 idmapping when using 'sec=sys'");