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>
43 #include <asm/system.h>
47 #include "delegation.h"
53 #define NFSDBG_FACILITY NFSDBG_CLIENT
55 static DEFINE_SPINLOCK(nfs_client_lock);
56 static LIST_HEAD(nfs_client_list);
57 static LIST_HEAD(nfs_volume_list);
58 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
60 static DEFINE_IDR(cb_ident_idr); /* Protected by nfs_client_lock */
63 * Get a unique NFSv4.0 callback identifier which will be used
64 * by the V4.0 callback service to lookup the nfs_client struct
66 static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
70 if (clp->rpc_ops->version != 4 || minorversion != 0)
73 if (!idr_pre_get(&cb_ident_idr, GFP_KERNEL))
75 spin_lock(&nfs_client_lock);
76 ret = idr_get_new(&cb_ident_idr, clp, &clp->cl_cb_ident);
77 spin_unlock(&nfs_client_lock);
82 #endif /* CONFIG_NFS_V4 */
85 * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
87 static int nfs4_disable_idmapping = 0;
92 static struct rpc_version *nfs_version[5] = {
102 struct rpc_program nfs_program = {
104 .number = NFS_PROGRAM,
105 .nrvers = ARRAY_SIZE(nfs_version),
106 .version = nfs_version,
107 .stats = &nfs_rpcstat,
108 .pipe_dir_name = NFS_PIPE_DIRNAME,
111 struct rpc_stat nfs_rpcstat = {
112 .program = &nfs_program
116 #ifdef CONFIG_NFS_V3_ACL
117 static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
118 static struct rpc_version * nfsacl_version[] = {
119 [3] = &nfsacl_version3,
122 struct rpc_program nfsacl_program = {
124 .number = NFS_ACL_PROGRAM,
125 .nrvers = ARRAY_SIZE(nfsacl_version),
126 .version = nfsacl_version,
127 .stats = &nfsacl_rpcstat,
129 #endif /* CONFIG_NFS_V3_ACL */
131 struct nfs_client_initdata {
132 const char *hostname;
133 const struct sockaddr *addr;
135 const struct nfs_rpc_ops *rpc_ops;
141 * Allocate a shared client record
143 * Since these are allocated/deallocated very rarely, we don't
144 * bother putting them in a slab cache...
146 static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
148 struct nfs_client *clp;
149 struct rpc_cred *cred;
152 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
155 clp->rpc_ops = cl_init->rpc_ops;
157 atomic_set(&clp->cl_count, 1);
158 clp->cl_cons_state = NFS_CS_INITING;
160 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
161 clp->cl_addrlen = cl_init->addrlen;
163 if (cl_init->hostname) {
165 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
166 if (!clp->cl_hostname)
170 INIT_LIST_HEAD(&clp->cl_superblocks);
171 clp->cl_rpcclient = ERR_PTR(-EINVAL);
173 clp->cl_proto = cl_init->proto;
176 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
180 spin_lock_init(&clp->cl_lock);
181 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
182 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
183 clp->cl_boot_time = CURRENT_TIME;
184 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
185 clp->cl_minorversion = cl_init->minorversion;
186 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
188 cred = rpc_lookup_machine_cred();
190 clp->cl_machine_cred = cred;
191 nfs_fscache_get_client_cookie(clp);
202 #ifdef CONFIG_NFS_V4_1
203 static void nfs4_shutdown_session(struct nfs_client *clp)
205 if (nfs4_has_session(clp))
206 nfs4_destroy_session(clp->cl_session);
208 #else /* CONFIG_NFS_V4_1 */
209 static void nfs4_shutdown_session(struct nfs_client *clp)
212 #endif /* CONFIG_NFS_V4_1 */
215 * Destroy the NFS4 callback service
217 static void nfs4_destroy_callback(struct nfs_client *clp)
219 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
220 nfs_callback_down(clp->cl_mvops->minor_version);
223 static void nfs4_shutdown_client(struct nfs_client *clp)
225 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
226 nfs4_kill_renewd(clp);
227 nfs4_shutdown_session(clp);
228 nfs4_destroy_callback(clp);
229 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
230 nfs_idmap_delete(clp);
232 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
235 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
236 void nfs_cleanup_cb_ident_idr(void)
238 idr_destroy(&cb_ident_idr);
241 /* nfs_client_lock held */
242 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
244 if (clp->cl_cb_ident)
245 idr_remove(&cb_ident_idr, clp->cl_cb_ident);
248 static void pnfs_init_server(struct nfs_server *server)
250 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
254 static void nfs4_shutdown_client(struct nfs_client *clp)
258 void nfs_cleanup_cb_ident_idr(void)
262 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
266 static void pnfs_init_server(struct nfs_server *server)
270 #endif /* CONFIG_NFS_V4 */
273 * Destroy a shared client record
275 static void nfs_free_client(struct nfs_client *clp)
277 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
279 nfs4_shutdown_client(clp);
281 nfs_fscache_release_client_cookie(clp);
283 /* -EIO all pending I/O */
284 if (!IS_ERR(clp->cl_rpcclient))
285 rpc_shutdown_client(clp->cl_rpcclient);
287 if (clp->cl_machine_cred != NULL)
288 put_rpccred(clp->cl_machine_cred);
290 nfs4_deviceid_purge_client(clp);
292 kfree(clp->cl_hostname);
293 kfree(clp->server_scope);
296 dprintk("<-- nfs_free_client()\n");
300 * Release a reference to a shared client record
302 void nfs_put_client(struct nfs_client *clp)
307 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
309 if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) {
310 list_del(&clp->cl_share_link);
311 nfs_cb_idr_remove_locked(clp);
312 spin_unlock(&nfs_client_lock);
314 BUG_ON(!list_empty(&clp->cl_superblocks));
316 nfs_free_client(clp);
319 EXPORT_SYMBOL_GPL(nfs_put_client);
321 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
323 * Test if two ip6 socket addresses refer to the same socket by
324 * comparing relevant fields. The padding bytes specifically, are not
325 * compared. sin6_flowinfo is not compared because it only affects QoS
326 * and sin6_scope_id is only compared if the address is "link local"
327 * because "link local" addresses need only be unique to a specific
328 * link. Conversely, ordinary unicast addresses might have different
331 * The caller should ensure both socket addresses are AF_INET6.
333 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
334 const struct sockaddr *sa2)
336 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
337 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
339 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
341 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
342 return sin1->sin6_scope_id == sin2->sin6_scope_id;
346 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
347 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
348 const struct sockaddr *sa2)
355 * Test if two ip4 socket addresses refer to the same socket, by
356 * comparing relevant fields. The padding bytes specifically, are
359 * The caller should ensure both socket addresses are AF_INET.
361 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
362 const struct sockaddr *sa2)
364 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
365 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
367 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
370 static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
371 const struct sockaddr *sa2)
373 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
374 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
376 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
377 (sin1->sin6_port == sin2->sin6_port);
380 static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
381 const struct sockaddr *sa2)
383 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
384 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
386 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
387 (sin1->sin_port == sin2->sin_port);
391 * Test if two socket addresses represent the same actual socket,
392 * by comparing (only) relevant fields, excluding the port number.
394 static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
395 const struct sockaddr *sa2)
397 if (sa1->sa_family != sa2->sa_family)
400 switch (sa1->sa_family) {
402 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
404 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
410 * Test if two socket addresses represent the same actual socket,
411 * by comparing (only) relevant fields, including the port number.
413 static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
414 const struct sockaddr *sa2)
416 if (sa1->sa_family != sa2->sa_family)
419 switch (sa1->sa_family) {
421 return nfs_sockaddr_cmp_ip4(sa1, sa2);
423 return nfs_sockaddr_cmp_ip6(sa1, sa2);
428 /* Common match routine for v4.0 and v4.1 callback services */
430 nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp,
433 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
435 /* Don't match clients that failed to initialise */
436 if (!(clp->cl_cons_state == NFS_CS_READY ||
437 clp->cl_cons_state == NFS_CS_SESSION_INITING))
440 /* Match the version and minorversion */
441 if (clp->rpc_ops->version != 4 ||
442 clp->cl_minorversion != minorversion)
445 /* Match only the IP address, not the port number */
446 if (!nfs_sockaddr_match_ipaddr(addr, clap))
453 * Find an nfs_client on the list that matches the initialisation data
456 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
458 struct nfs_client *clp;
459 const struct sockaddr *sap = data->addr;
461 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
462 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
463 /* Don't match clients that failed to initialise properly */
464 if (clp->cl_cons_state < 0)
467 /* Different NFS versions cannot share the same nfs_client */
468 if (clp->rpc_ops != data->rpc_ops)
471 if (clp->cl_proto != data->proto)
473 /* Match nfsv4 minorversion */
474 if (clp->cl_minorversion != data->minorversion)
476 /* Match the full socket address */
477 if (!nfs_sockaddr_cmp(sap, clap))
480 atomic_inc(&clp->cl_count);
487 * Look up a client by IP address and protocol version
488 * - creates a new record if one doesn't yet exist
490 static struct nfs_client *
491 nfs_get_client(const struct nfs_client_initdata *cl_init,
492 const struct rpc_timeout *timeparms,
494 rpc_authflavor_t authflavour,
497 struct nfs_client *clp, *new = NULL;
500 dprintk("--> nfs_get_client(%s,v%u)\n",
501 cl_init->hostname ?: "", cl_init->rpc_ops->version);
503 /* see if the client already exists */
505 spin_lock(&nfs_client_lock);
507 clp = nfs_match_client(cl_init);
513 spin_unlock(&nfs_client_lock);
515 new = nfs_alloc_client(cl_init);
516 } while (!IS_ERR(new));
518 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
521 /* install a new client and return with it unready */
524 list_add(&clp->cl_share_link, &nfs_client_list);
525 spin_unlock(&nfs_client_lock);
527 error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
528 authflavour, noresvport);
531 return ERR_PTR(error);
533 dprintk("--> nfs_get_client() = %p [new]\n", clp);
536 /* found an existing client
537 * - make sure it's ready before returning
540 spin_unlock(&nfs_client_lock);
543 nfs_free_client(new);
545 error = wait_event_killable(nfs_client_active_wq,
546 clp->cl_cons_state < NFS_CS_INITING);
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);
558 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
560 dprintk("--> nfs_get_client() = %p [share]\n", clp);
565 * Mark a server as ready or failed
567 void nfs_mark_client_ready(struct nfs_client *clp, int state)
569 clp->cl_cons_state = state;
570 wake_up_all(&nfs_client_active_wq);
574 * With sessions, the client is not marked ready until after a
575 * successful EXCHANGE_ID and CREATE_SESSION.
577 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
578 * other versions of NFS can be tried.
580 int nfs4_check_client_ready(struct nfs_client *clp)
582 if (!nfs4_has_session(clp))
584 if (clp->cl_cons_state < NFS_CS_READY)
585 return -EPROTONOSUPPORT;
590 * Initialise the timeout values for a connection
592 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
593 unsigned int timeo, unsigned int retrans)
595 to->to_initval = timeo * HZ / 10;
596 to->to_retries = retrans;
599 case XPRT_TRANSPORT_TCP:
600 case XPRT_TRANSPORT_RDMA:
601 if (to->to_retries == 0)
602 to->to_retries = NFS_DEF_TCP_RETRANS;
603 if (to->to_initval == 0)
604 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
605 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
606 to->to_initval = NFS_MAX_TCP_TIMEOUT;
607 to->to_increment = to->to_initval;
608 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
609 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
610 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
611 if (to->to_maxval < to->to_initval)
612 to->to_maxval = to->to_initval;
613 to->to_exponential = 0;
615 case XPRT_TRANSPORT_UDP:
616 if (to->to_retries == 0)
617 to->to_retries = NFS_DEF_UDP_RETRANS;
619 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
620 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
621 to->to_initval = NFS_MAX_UDP_TIMEOUT;
622 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
623 to->to_exponential = 1;
631 * Create an RPC client handle
633 static int nfs_create_rpc_client(struct nfs_client *clp,
634 const struct rpc_timeout *timeparms,
635 rpc_authflavor_t flavor,
636 int discrtry, int noresvport)
638 struct rpc_clnt *clnt = NULL;
639 struct rpc_create_args args = {
641 .protocol = clp->cl_proto,
642 .address = (struct sockaddr *)&clp->cl_addr,
643 .addrsize = clp->cl_addrlen,
644 .timeout = timeparms,
645 .servername = clp->cl_hostname,
646 .program = &nfs_program,
647 .version = clp->rpc_ops->version,
648 .authflavor = flavor,
652 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
654 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
656 if (!IS_ERR(clp->cl_rpcclient))
659 clnt = rpc_create(&args);
661 dprintk("%s: cannot create RPC client. Error = %ld\n",
662 __func__, PTR_ERR(clnt));
663 return PTR_ERR(clnt);
666 clp->cl_rpcclient = clnt;
671 * Version 2 or 3 client destruction
673 static void nfs_destroy_server(struct nfs_server *server)
675 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
676 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
677 nlmclnt_done(server->nlm_host);
681 * Version 2 or 3 lockd setup
683 static int nfs_start_lockd(struct nfs_server *server)
685 struct nlm_host *host;
686 struct nfs_client *clp = server->nfs_client;
687 struct nlmclnt_initdata nlm_init = {
688 .hostname = clp->cl_hostname,
689 .address = (struct sockaddr *)&clp->cl_addr,
690 .addrlen = clp->cl_addrlen,
691 .nfs_version = clp->rpc_ops->version,
692 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
696 if (nlm_init.nfs_version > 3)
698 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
699 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
702 switch (clp->cl_proto) {
704 nlm_init.protocol = IPPROTO_TCP;
706 case XPRT_TRANSPORT_UDP:
707 nlm_init.protocol = IPPROTO_UDP;
710 host = nlmclnt_init(&nlm_init);
712 return PTR_ERR(host);
714 server->nlm_host = host;
715 server->destroy = nfs_destroy_server;
720 * Initialise an NFSv3 ACL client connection
722 #ifdef CONFIG_NFS_V3_ACL
723 static void nfs_init_server_aclclient(struct nfs_server *server)
725 if (server->nfs_client->rpc_ops->version != 3)
727 if (server->flags & NFS_MOUNT_NOACL)
730 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
731 if (IS_ERR(server->client_acl))
734 /* No errors! Assume that Sun nfsacls are supported */
735 server->caps |= NFS_CAP_ACLS;
739 server->caps &= ~NFS_CAP_ACLS;
742 static inline void nfs_init_server_aclclient(struct nfs_server *server)
744 server->flags &= ~NFS_MOUNT_NOACL;
745 server->caps &= ~NFS_CAP_ACLS;
750 * Create a general RPC client
752 static int nfs_init_server_rpcclient(struct nfs_server *server,
753 const struct rpc_timeout *timeo,
754 rpc_authflavor_t pseudoflavour)
756 struct nfs_client *clp = server->nfs_client;
758 server->client = rpc_clone_client(clp->cl_rpcclient);
759 if (IS_ERR(server->client)) {
760 dprintk("%s: couldn't create rpc_client!\n", __func__);
761 return PTR_ERR(server->client);
764 memcpy(&server->client->cl_timeout_default,
766 sizeof(server->client->cl_timeout_default));
767 server->client->cl_timeout = &server->client->cl_timeout_default;
769 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
770 struct rpc_auth *auth;
772 auth = rpcauth_create(pseudoflavour, server->client);
774 dprintk("%s: couldn't create credcache!\n", __func__);
775 return PTR_ERR(auth);
778 server->client->cl_softrtry = 0;
779 if (server->flags & NFS_MOUNT_SOFT)
780 server->client->cl_softrtry = 1;
786 * Initialise an NFS2 or NFS3 client
788 int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
789 const char *ip_addr, rpc_authflavor_t authflavour,
794 if (clp->cl_cons_state == NFS_CS_READY) {
795 /* the client is already initialised */
796 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
801 * Create a client RPC handle for doing FSSTAT with UNIX auth only
802 * - RFC 2623, sec 2.3.2
804 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
808 nfs_mark_client_ready(clp, NFS_CS_READY);
812 nfs_mark_client_ready(clp, error);
813 dprintk("<-- nfs_init_client() = xerror %d\n", error);
818 * Create a version 2 or 3 client
820 static int nfs_init_server(struct nfs_server *server,
821 const struct nfs_parsed_mount_data *data)
823 struct nfs_client_initdata cl_init = {
824 .hostname = data->nfs_server.hostname,
825 .addr = (const struct sockaddr *)&data->nfs_server.address,
826 .addrlen = data->nfs_server.addrlen,
827 .rpc_ops = &nfs_v2_clientops,
828 .proto = data->nfs_server.protocol,
830 struct rpc_timeout timeparms;
831 struct nfs_client *clp;
834 dprintk("--> nfs_init_server()\n");
837 if (data->version == 3)
838 cl_init.rpc_ops = &nfs_v3_clientops;
841 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
842 data->timeo, data->retrans);
844 /* Allocate or find a client reference we can use */
845 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX,
846 data->flags & NFS_MOUNT_NORESVPORT);
848 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
852 server->nfs_client = clp;
854 /* Initialise the client representation from the mount data */
855 server->flags = data->flags;
856 server->options = data->options;
857 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
858 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
859 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
862 server->rsize = nfs_block_size(data->rsize, NULL);
864 server->wsize = nfs_block_size(data->wsize, NULL);
866 server->acregmin = data->acregmin * HZ;
867 server->acregmax = data->acregmax * HZ;
868 server->acdirmin = data->acdirmin * HZ;
869 server->acdirmax = data->acdirmax * HZ;
871 /* Start lockd here, before we might error out */
872 error = nfs_start_lockd(server);
876 server->port = data->nfs_server.port;
878 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
882 /* Preserve the values of mount_server-related mount options */
883 if (data->mount_server.addrlen) {
884 memcpy(&server->mountd_address, &data->mount_server.address,
885 data->mount_server.addrlen);
886 server->mountd_addrlen = data->mount_server.addrlen;
888 server->mountd_version = data->mount_server.version;
889 server->mountd_port = data->mount_server.port;
890 server->mountd_protocol = data->mount_server.protocol;
892 server->namelen = data->namlen;
893 /* Create a client RPC handle for the NFSv3 ACL management interface */
894 nfs_init_server_aclclient(server);
895 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
899 server->nfs_client = NULL;
901 dprintk("<-- nfs_init_server() = xerror %d\n", error);
906 * Load up the server record from information gained in an fsinfo record
908 static void nfs_server_set_fsinfo(struct nfs_server *server,
909 struct nfs_fh *mntfh,
910 struct nfs_fsinfo *fsinfo)
912 unsigned long max_rpc_payload;
914 /* Work out a lot of parameters */
915 if (server->rsize == 0)
916 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
917 if (server->wsize == 0)
918 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
920 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
921 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
922 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
923 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
925 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
926 if (server->rsize > max_rpc_payload)
927 server->rsize = max_rpc_payload;
928 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
929 server->rsize = NFS_MAX_FILE_IO_SIZE;
930 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
932 server->backing_dev_info.name = "nfs";
933 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
935 if (server->wsize > max_rpc_payload)
936 server->wsize = max_rpc_payload;
937 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
938 server->wsize = NFS_MAX_FILE_IO_SIZE;
939 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
940 server->pnfs_blksize = fsinfo->blksize;
941 set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
943 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
945 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
946 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
947 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
948 if (server->dtsize > server->rsize)
949 server->dtsize = server->rsize;
951 if (server->flags & NFS_MOUNT_NOAC) {
952 server->acregmin = server->acregmax = 0;
953 server->acdirmin = server->acdirmax = 0;
956 server->maxfilesize = fsinfo->maxfilesize;
958 server->time_delta = fsinfo->time_delta;
960 /* We're airborne Set socket buffersize */
961 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
965 * Probe filesystem information, including the FSID on v2/v3
967 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
969 struct nfs_fsinfo fsinfo;
970 struct nfs_client *clp = server->nfs_client;
973 dprintk("--> nfs_probe_fsinfo()\n");
975 if (clp->rpc_ops->set_capabilities != NULL) {
976 error = clp->rpc_ops->set_capabilities(server, mntfh);
981 fsinfo.fattr = fattr;
982 fsinfo.layouttype = 0;
983 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
987 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
989 /* Get some general file system info */
990 if (server->namelen == 0) {
991 struct nfs_pathconf pathinfo;
993 pathinfo.fattr = fattr;
994 nfs_fattr_init(fattr);
996 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
997 server->namelen = pathinfo.max_namelen;
1000 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1004 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1009 * Copy useful information when duplicating a server record
1011 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1013 target->flags = source->flags;
1014 target->rsize = source->rsize;
1015 target->wsize = source->wsize;
1016 target->acregmin = source->acregmin;
1017 target->acregmax = source->acregmax;
1018 target->acdirmin = source->acdirmin;
1019 target->acdirmax = source->acdirmax;
1020 target->caps = source->caps;
1021 target->options = source->options;
1024 static void nfs_server_insert_lists(struct nfs_server *server)
1026 struct nfs_client *clp = server->nfs_client;
1028 spin_lock(&nfs_client_lock);
1029 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
1030 list_add_tail(&server->master_link, &nfs_volume_list);
1031 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1032 spin_unlock(&nfs_client_lock);
1036 static void nfs_server_remove_lists(struct nfs_server *server)
1038 struct nfs_client *clp = server->nfs_client;
1040 spin_lock(&nfs_client_lock);
1041 list_del_rcu(&server->client_link);
1042 if (clp && list_empty(&clp->cl_superblocks))
1043 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1044 list_del(&server->master_link);
1045 spin_unlock(&nfs_client_lock);
1051 * Allocate and initialise a server record
1053 static struct nfs_server *nfs_alloc_server(void)
1055 struct nfs_server *server;
1057 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1061 server->client = server->client_acl = ERR_PTR(-EINVAL);
1063 /* Zero out the NFS state stuff */
1064 INIT_LIST_HEAD(&server->client_link);
1065 INIT_LIST_HEAD(&server->master_link);
1066 INIT_LIST_HEAD(&server->delegations);
1067 INIT_LIST_HEAD(&server->layouts);
1069 atomic_set(&server->active, 0);
1071 server->io_stats = nfs_alloc_iostats();
1072 if (!server->io_stats) {
1077 if (bdi_init(&server->backing_dev_info)) {
1078 nfs_free_iostats(server->io_stats);
1083 pnfs_init_server(server);
1089 * Free up a server record
1091 void nfs_free_server(struct nfs_server *server)
1093 dprintk("--> nfs_free_server()\n");
1095 nfs_server_remove_lists(server);
1096 unset_pnfs_layoutdriver(server);
1098 if (server->destroy != NULL)
1099 server->destroy(server);
1101 if (!IS_ERR(server->client_acl))
1102 rpc_shutdown_client(server->client_acl);
1103 if (!IS_ERR(server->client))
1104 rpc_shutdown_client(server->client);
1106 nfs_put_client(server->nfs_client);
1108 nfs_free_iostats(server->io_stats);
1109 bdi_destroy(&server->backing_dev_info);
1111 nfs_release_automount_timer();
1112 dprintk("<-- nfs_free_server()\n");
1116 * Create a version 2 or 3 volume record
1117 * - keyed on server and FSID
1119 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1120 struct nfs_fh *mntfh)
1122 struct nfs_server *server;
1123 struct nfs_fattr *fattr;
1126 server = nfs_alloc_server();
1128 return ERR_PTR(-ENOMEM);
1131 fattr = nfs_alloc_fattr();
1135 /* Get a client representation */
1136 error = nfs_init_server(server, data);
1140 BUG_ON(!server->nfs_client);
1141 BUG_ON(!server->nfs_client->rpc_ops);
1142 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1144 /* Probe the root fh to retrieve its FSID */
1145 error = nfs_probe_fsinfo(server, mntfh, fattr);
1148 if (server->nfs_client->rpc_ops->version == 3) {
1149 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1150 server->namelen = NFS3_MAXNAMLEN;
1151 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1152 server->caps |= NFS_CAP_READDIRPLUS;
1154 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1155 server->namelen = NFS2_MAXNAMLEN;
1158 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1159 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
1161 dprintk("nfs_create_server: getattr error = %d\n", -error);
1165 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
1167 dprintk("Server FSID: %llx:%llx\n",
1168 (unsigned long long) server->fsid.major,
1169 (unsigned long long) server->fsid.minor);
1171 nfs_server_insert_lists(server);
1172 server->mount_time = jiffies;
1173 nfs_free_fattr(fattr);
1177 nfs_free_fattr(fattr);
1178 nfs_free_server(server);
1179 return ERR_PTR(error);
1182 #ifdef CONFIG_NFS_V4
1184 * NFSv4.0 callback thread helper
1186 * Find a client by IP address, protocol version, and minorversion
1188 * Called from the pg_authenticate method. The callback identifier
1189 * is not used as it has not been decoded.
1191 * Returns NULL if no such client
1194 nfs4_find_client_no_ident(const struct sockaddr *addr)
1196 struct nfs_client *clp;
1198 spin_lock(&nfs_client_lock);
1199 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
1200 if (nfs4_cb_match_client(addr, clp, 0) == false)
1202 atomic_inc(&clp->cl_count);
1203 spin_unlock(&nfs_client_lock);
1206 spin_unlock(&nfs_client_lock);
1211 * NFSv4.0 callback thread helper
1213 * Find a client by callback identifier
1216 nfs4_find_client_ident(int cb_ident)
1218 struct nfs_client *clp;
1220 spin_lock(&nfs_client_lock);
1221 clp = idr_find(&cb_ident_idr, cb_ident);
1223 atomic_inc(&clp->cl_count);
1224 spin_unlock(&nfs_client_lock);
1228 #if defined(CONFIG_NFS_V4_1)
1230 * NFSv4.1 callback thread helper
1231 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1232 * minorversion, and sessionID
1234 * Returns NULL if no such client
1237 nfs4_find_client_sessionid(const struct sockaddr *addr,
1238 struct nfs4_sessionid *sid)
1240 struct nfs_client *clp;
1242 spin_lock(&nfs_client_lock);
1243 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
1244 if (nfs4_cb_match_client(addr, clp, 1) == false)
1247 if (!nfs4_has_session(clp))
1250 /* Match sessionid*/
1251 if (memcmp(clp->cl_session->sess_id.data,
1252 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
1255 atomic_inc(&clp->cl_count);
1256 spin_unlock(&nfs_client_lock);
1259 spin_unlock(&nfs_client_lock);
1263 #else /* CONFIG_NFS_V4_1 */
1266 nfs4_find_client_sessionid(const struct sockaddr *addr,
1267 struct nfs4_sessionid *sid)
1271 #endif /* CONFIG_NFS_V4_1 */
1274 * Initialize the NFS4 callback service
1276 static int nfs4_init_callback(struct nfs_client *clp)
1280 if (clp->rpc_ops->version == 4) {
1281 if (nfs4_has_session(clp)) {
1282 error = xprt_setup_backchannel(
1283 clp->cl_rpcclient->cl_xprt,
1284 NFS41_BC_MIN_CALLBACKS);
1289 error = nfs_callback_up(clp->cl_mvops->minor_version,
1290 clp->cl_rpcclient->cl_xprt);
1292 dprintk("%s: failed to start callback. Error = %d\n",
1296 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1302 * Initialize the minor version specific parts of an NFS4 client record
1304 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1306 #if defined(CONFIG_NFS_V4_1)
1307 if (clp->cl_mvops->minor_version) {
1308 struct nfs4_session *session = NULL;
1310 * Create the session and mark it expired.
1311 * When a SEQUENCE operation encounters the expired session
1312 * it will do session recovery to initialize it.
1314 session = nfs4_alloc_session(clp);
1318 clp->cl_session = session;
1320 * The create session reply races with the server back
1321 * channel probe. Mark the client NFS_CS_SESSION_INITING
1322 * so that the client back channel can find the
1325 clp->cl_cons_state = NFS_CS_SESSION_INITING;
1327 #endif /* CONFIG_NFS_V4_1 */
1329 return nfs4_init_callback(clp);
1333 * Initialise an NFS4 client record
1335 int nfs4_init_client(struct nfs_client *clp,
1336 const struct rpc_timeout *timeparms,
1337 const char *ip_addr,
1338 rpc_authflavor_t authflavour,
1343 if (clp->cl_cons_state == NFS_CS_READY) {
1344 /* the client is initialised already */
1345 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1349 /* Check NFS protocol revision and initialize RPC op vector */
1350 clp->rpc_ops = &nfs_v4_clientops;
1352 error = nfs_create_rpc_client(clp, timeparms, authflavour,
1356 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1358 error = nfs_idmap_new(clp);
1360 dprintk("%s: failed to create idmapper. Error = %d\n",
1364 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1366 error = nfs4_init_client_minor_version(clp);
1370 if (!nfs4_has_session(clp))
1371 nfs_mark_client_ready(clp, NFS_CS_READY);
1375 nfs_mark_client_ready(clp, error);
1376 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1381 * Set up an NFS4 client
1383 static int nfs4_set_client(struct nfs_server *server,
1384 const char *hostname,
1385 const struct sockaddr *addr,
1386 const size_t addrlen,
1387 const char *ip_addr,
1388 rpc_authflavor_t authflavour,
1389 int proto, const struct rpc_timeout *timeparms,
1392 struct nfs_client_initdata cl_init = {
1393 .hostname = hostname,
1396 .rpc_ops = &nfs_v4_clientops,
1398 .minorversion = minorversion,
1400 struct nfs_client *clp;
1403 dprintk("--> nfs4_set_client()\n");
1405 /* Allocate or find a client reference we can use */
1406 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour,
1407 server->flags & NFS_MOUNT_NORESVPORT);
1409 error = PTR_ERR(clp);
1414 * Query for the lease time on clientid setup or renewal
1416 * Note that this will be set on nfs_clients that were created
1417 * only for the DS role and did not set this bit, but now will
1418 * serve a dual role.
1420 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1422 server->nfs_client = clp;
1423 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1426 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1431 * Set up a pNFS Data Server client.
1433 * Return any existing nfs_client that matches server address,port,version
1436 * For a new nfs_client, use a soft mount (default), a low retrans and a
1437 * low timeout interval so that if a connection is lost, we retry through
1440 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1441 const struct sockaddr *ds_addr,
1442 int ds_addrlen, int ds_proto)
1444 struct nfs_client_initdata cl_init = {
1446 .addrlen = ds_addrlen,
1447 .rpc_ops = &nfs_v4_clientops,
1449 .minorversion = mds_clp->cl_minorversion,
1451 struct rpc_timeout ds_timeout = {
1452 .to_initval = 15 * HZ,
1453 .to_maxval = 15 * HZ,
1455 .to_exponential = 1,
1457 struct nfs_client *clp;
1460 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1461 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1462 * (section 13.1 RFC 5661).
1464 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1465 mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
1467 dprintk("<-- %s %p\n", __func__, clp);
1470 EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
1473 * Session has been established, and the client marked ready.
1474 * Set the mount rsize and wsize with negotiated fore channel
1475 * attributes which will be bound checked in nfs_server_set_fsinfo.
1477 static void nfs4_session_set_rwsize(struct nfs_server *server)
1479 #ifdef CONFIG_NFS_V4_1
1480 struct nfs4_session *sess;
1484 if (!nfs4_has_session(server->nfs_client))
1486 sess = server->nfs_client->cl_session;
1487 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1488 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1490 if (server->rsize > server_resp_sz)
1491 server->rsize = server_resp_sz;
1492 if (server->wsize > server_rqst_sz)
1493 server->wsize = server_rqst_sz;
1494 #endif /* CONFIG_NFS_V4_1 */
1497 static int nfs4_server_common_setup(struct nfs_server *server,
1498 struct nfs_fh *mntfh)
1500 struct nfs_fattr *fattr;
1503 BUG_ON(!server->nfs_client);
1504 BUG_ON(!server->nfs_client->rpc_ops);
1505 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1507 /* data servers support only a subset of NFSv4.1 */
1508 if (is_ds_only_client(server->nfs_client))
1509 return -EPROTONOSUPPORT;
1511 fattr = nfs_alloc_fattr();
1515 /* We must ensure the session is initialised first */
1516 error = nfs4_init_session(server);
1520 /* Probe the root fh to retrieve its FSID and filehandle */
1521 error = nfs4_get_rootfh(server, mntfh);
1525 dprintk("Server FSID: %llx:%llx\n",
1526 (unsigned long long) server->fsid.major,
1527 (unsigned long long) server->fsid.minor);
1528 dprintk("Mount FH: %d\n", mntfh->size);
1530 nfs4_session_set_rwsize(server);
1532 error = nfs_probe_fsinfo(server, mntfh, fattr);
1536 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1537 server->namelen = NFS4_MAXNAMLEN;
1539 nfs_server_insert_lists(server);
1540 server->mount_time = jiffies;
1542 nfs_free_fattr(fattr);
1547 * Create a version 4 volume record
1549 static int nfs4_init_server(struct nfs_server *server,
1550 const struct nfs_parsed_mount_data *data)
1552 struct rpc_timeout timeparms;
1555 dprintk("--> nfs4_init_server()\n");
1557 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1558 data->timeo, data->retrans);
1560 /* Initialise the client representation from the mount data */
1561 server->flags = data->flags;
1562 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1563 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1564 server->caps |= NFS_CAP_READDIRPLUS;
1565 server->options = data->options;
1567 /* Get a client record */
1568 error = nfs4_set_client(server,
1569 data->nfs_server.hostname,
1570 (const struct sockaddr *)&data->nfs_server.address,
1571 data->nfs_server.addrlen,
1572 data->client_address,
1573 data->auth_flavors[0],
1574 data->nfs_server.protocol,
1576 data->minorversion);
1581 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1584 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1585 server->caps |= NFS_CAP_UIDGID_NOMAP;
1588 server->rsize = nfs_block_size(data->rsize, NULL);
1590 server->wsize = nfs_block_size(data->wsize, NULL);
1592 server->acregmin = data->acregmin * HZ;
1593 server->acregmax = data->acregmax * HZ;
1594 server->acdirmin = data->acdirmin * HZ;
1595 server->acdirmax = data->acdirmax * HZ;
1597 server->port = data->nfs_server.port;
1599 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1603 dprintk("<-- nfs4_init_server() = %d\n", error);
1608 * Create a version 4 volume record
1609 * - keyed on server and FSID
1611 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1612 struct nfs_fh *mntfh)
1614 struct nfs_server *server;
1617 dprintk("--> nfs4_create_server()\n");
1619 server = nfs_alloc_server();
1621 return ERR_PTR(-ENOMEM);
1623 /* set up the general RPC client */
1624 error = nfs4_init_server(server, data);
1628 error = nfs4_server_common_setup(server, mntfh);
1632 dprintk("<-- nfs4_create_server() = %p\n", server);
1636 nfs_free_server(server);
1637 dprintk("<-- nfs4_create_server() = error %d\n", error);
1638 return ERR_PTR(error);
1642 * Create an NFS4 referral server record
1644 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1645 struct nfs_fh *mntfh)
1647 struct nfs_client *parent_client;
1648 struct nfs_server *server, *parent_server;
1651 dprintk("--> nfs4_create_referral_server()\n");
1653 server = nfs_alloc_server();
1655 return ERR_PTR(-ENOMEM);
1657 parent_server = NFS_SB(data->sb);
1658 parent_client = parent_server->nfs_client;
1660 /* Initialise the client representation from the parent server */
1661 nfs_server_copy_userdata(server, parent_server);
1662 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
1664 /* Get a client representation.
1665 * Note: NFSv4 always uses TCP, */
1666 error = nfs4_set_client(server, data->hostname,
1669 parent_client->cl_ipaddr,
1671 parent_server->client->cl_xprt->prot,
1672 parent_server->client->cl_timeout,
1673 parent_client->cl_mvops->minor_version);
1677 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1681 error = nfs4_server_common_setup(server, mntfh);
1685 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1689 nfs_free_server(server);
1690 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1691 return ERR_PTR(error);
1694 #endif /* CONFIG_NFS_V4 */
1697 * Clone an NFS2, NFS3 or NFS4 server record
1699 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1701 struct nfs_fattr *fattr)
1703 struct nfs_server *server;
1704 struct nfs_fattr *fattr_fsinfo;
1707 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1708 (unsigned long long) fattr->fsid.major,
1709 (unsigned long long) fattr->fsid.minor);
1711 server = nfs_alloc_server();
1713 return ERR_PTR(-ENOMEM);
1716 fattr_fsinfo = nfs_alloc_fattr();
1717 if (fattr_fsinfo == NULL)
1718 goto out_free_server;
1720 /* Copy data from the source */
1721 server->nfs_client = source->nfs_client;
1722 atomic_inc(&server->nfs_client->cl_count);
1723 nfs_server_copy_userdata(server, source);
1725 server->fsid = fattr->fsid;
1727 error = nfs_init_server_rpcclient(server,
1728 source->client->cl_timeout,
1729 source->client->cl_auth->au_flavor);
1731 goto out_free_server;
1732 if (!IS_ERR(source->client_acl))
1733 nfs_init_server_aclclient(server);
1735 /* probe the filesystem info for this server filesystem */
1736 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1738 goto out_free_server;
1740 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1741 server->namelen = NFS4_MAXNAMLEN;
1743 dprintk("Cloned FSID: %llx:%llx\n",
1744 (unsigned long long) server->fsid.major,
1745 (unsigned long long) server->fsid.minor);
1747 error = nfs_start_lockd(server);
1749 goto out_free_server;
1751 nfs_server_insert_lists(server);
1752 server->mount_time = jiffies;
1754 nfs_free_fattr(fattr_fsinfo);
1755 dprintk("<-- nfs_clone_server() = %p\n", server);
1759 nfs_free_fattr(fattr_fsinfo);
1760 nfs_free_server(server);
1761 dprintk("<-- nfs_clone_server() = error %d\n", error);
1762 return ERR_PTR(error);
1765 #ifdef CONFIG_PROC_FS
1766 static struct proc_dir_entry *proc_fs_nfs;
1768 static int nfs_server_list_open(struct inode *inode, struct file *file);
1769 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1770 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1771 static void nfs_server_list_stop(struct seq_file *p, void *v);
1772 static int nfs_server_list_show(struct seq_file *m, void *v);
1774 static const struct seq_operations nfs_server_list_ops = {
1775 .start = nfs_server_list_start,
1776 .next = nfs_server_list_next,
1777 .stop = nfs_server_list_stop,
1778 .show = nfs_server_list_show,
1781 static const struct file_operations nfs_server_list_fops = {
1782 .open = nfs_server_list_open,
1784 .llseek = seq_lseek,
1785 .release = seq_release,
1786 .owner = THIS_MODULE,
1789 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1790 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1791 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1792 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1793 static int nfs_volume_list_show(struct seq_file *m, void *v);
1795 static const struct seq_operations nfs_volume_list_ops = {
1796 .start = nfs_volume_list_start,
1797 .next = nfs_volume_list_next,
1798 .stop = nfs_volume_list_stop,
1799 .show = nfs_volume_list_show,
1802 static const struct file_operations nfs_volume_list_fops = {
1803 .open = nfs_volume_list_open,
1805 .llseek = seq_lseek,
1806 .release = seq_release,
1807 .owner = THIS_MODULE,
1811 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1814 static int nfs_server_list_open(struct inode *inode, struct file *file)
1819 ret = seq_open(file, &nfs_server_list_ops);
1823 m = file->private_data;
1824 m->private = PDE(inode)->data;
1830 * set up the iterator to start reading from the server list and return the first item
1832 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1834 /* lock the list against modification */
1835 spin_lock(&nfs_client_lock);
1836 return seq_list_start_head(&nfs_client_list, *_pos);
1840 * move to next server
1842 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1844 return seq_list_next(v, &nfs_client_list, pos);
1848 * clean up after reading from the transports list
1850 static void nfs_server_list_stop(struct seq_file *p, void *v)
1852 spin_unlock(&nfs_client_lock);
1856 * display a header line followed by a load of call lines
1858 static int nfs_server_list_show(struct seq_file *m, void *v)
1860 struct nfs_client *clp;
1862 /* display header on line 1 */
1863 if (v == &nfs_client_list) {
1864 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1868 /* display one transport per line on subsequent lines */
1869 clp = list_entry(v, struct nfs_client, cl_share_link);
1871 /* Check if the client is initialized */
1872 if (clp->cl_cons_state != NFS_CS_READY)
1875 seq_printf(m, "v%u %s %s %3d %s\n",
1876 clp->rpc_ops->version,
1877 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1878 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1879 atomic_read(&clp->cl_count),
1886 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1888 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1893 ret = seq_open(file, &nfs_volume_list_ops);
1897 m = file->private_data;
1898 m->private = PDE(inode)->data;
1904 * set up the iterator to start reading from the volume list and return the first item
1906 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1908 /* lock the list against modification */
1909 spin_lock(&nfs_client_lock);
1910 return seq_list_start_head(&nfs_volume_list, *_pos);
1914 * move to next volume
1916 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1918 return seq_list_next(v, &nfs_volume_list, pos);
1922 * clean up after reading from the transports list
1924 static void nfs_volume_list_stop(struct seq_file *p, void *v)
1926 spin_unlock(&nfs_client_lock);
1930 * display a header line followed by a load of call lines
1932 static int nfs_volume_list_show(struct seq_file *m, void *v)
1934 struct nfs_server *server;
1935 struct nfs_client *clp;
1936 char dev[8], fsid[17];
1938 /* display header on line 1 */
1939 if (v == &nfs_volume_list) {
1940 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
1943 /* display one transport per line on subsequent lines */
1944 server = list_entry(v, struct nfs_server, master_link);
1945 clp = server->nfs_client;
1947 snprintf(dev, 8, "%u:%u",
1948 MAJOR(server->s_dev), MINOR(server->s_dev));
1950 snprintf(fsid, 17, "%llx:%llx",
1951 (unsigned long long) server->fsid.major,
1952 (unsigned long long) server->fsid.minor);
1954 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
1955 clp->rpc_ops->version,
1956 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1957 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1960 nfs_server_fscache_state(server));
1966 * initialise the /proc/fs/nfsfs/ directory
1968 int __init nfs_fs_proc_init(void)
1970 struct proc_dir_entry *p;
1972 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
1976 /* a file of servers with which we're dealing */
1977 p = proc_create("servers", S_IFREG|S_IRUGO,
1978 proc_fs_nfs, &nfs_server_list_fops);
1982 /* a file of volumes that we have mounted */
1983 p = proc_create("volumes", S_IFREG|S_IRUGO,
1984 proc_fs_nfs, &nfs_volume_list_fops);
1990 remove_proc_entry("servers", proc_fs_nfs);
1992 remove_proc_entry("fs/nfsfs", NULL);
1998 * clean up the /proc/fs/nfsfs/ directory
2000 void nfs_fs_proc_exit(void)
2002 remove_proc_entry("volumes", proc_fs_nfs);
2003 remove_proc_entry("servers", proc_fs_nfs);
2004 remove_proc_entry("fs/nfsfs", NULL);
2007 #endif /* CONFIG_PROC_FS */
2009 module_param(nfs4_disable_idmapping, bool, 0644);
2010 MODULE_PARM_DESC(nfs4_disable_idmapping,
2011 "Turn off NFSv4 idmapping when using 'sec=sys'");