1 /* client.c: NFS client sharing and management code
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include <linux/time.h>
17 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/stat.h>
21 #include <linux/errno.h>
22 #include <linux/unistd.h>
23 #include <linux/sunrpc/clnt.h>
24 #include <linux/sunrpc/stats.h>
25 #include <linux/sunrpc/metrics.h>
26 #include <linux/sunrpc/xprtsock.h>
27 #include <linux/sunrpc/xprtrdma.h>
28 #include <linux/nfs_fs.h>
29 #include <linux/nfs_mount.h>
30 #include <linux/nfs4_mount.h>
31 #include <linux/lockd/bind.h>
32 #include <linux/seq_file.h>
33 #include <linux/mount.h>
34 #include <linux/nfs_idmap.h>
35 #include <linux/vfs.h>
36 #include <linux/inet.h>
37 #include <linux/in6.h>
38 #include <linux/slab.h>
39 #include <linux/idr.h>
41 #include <linux/nfs_xdr.h>
42 #include <linux/sunrpc/bc_xprt.h>
44 #include <asm/system.h>
48 #include "delegation.h"
54 #define NFSDBG_FACILITY NFSDBG_CLIENT
56 static DEFINE_SPINLOCK(nfs_client_lock);
57 static LIST_HEAD(nfs_client_list);
58 static LIST_HEAD(nfs_volume_list);
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 struct rpc_version *nfs_version[5] = {
103 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 struct rpc_version * nfsacl_version[] = {
120 [3] = &nfsacl_version3,
123 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;
142 * Allocate a shared client record
144 * Since these are allocated/deallocated very rarely, we don't
145 * bother putting them in a slab cache...
147 static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
149 struct nfs_client *clp;
150 struct rpc_cred *cred;
153 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
156 clp->rpc_ops = cl_init->rpc_ops;
158 atomic_set(&clp->cl_count, 1);
159 clp->cl_cons_state = NFS_CS_INITING;
161 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
162 clp->cl_addrlen = cl_init->addrlen;
164 if (cl_init->hostname) {
166 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
167 if (!clp->cl_hostname)
171 INIT_LIST_HEAD(&clp->cl_superblocks);
172 clp->cl_rpcclient = ERR_PTR(-EINVAL);
174 clp->cl_proto = cl_init->proto;
177 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
181 spin_lock_init(&clp->cl_lock);
182 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
183 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
184 clp->cl_boot_time = CURRENT_TIME;
185 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
186 clp->cl_minorversion = cl_init->minorversion;
187 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
189 cred = rpc_lookup_machine_cred("*");
191 clp->cl_machine_cred = cred;
192 nfs_fscache_get_client_cookie(clp);
203 #ifdef CONFIG_NFS_V4_1
204 static void nfs4_shutdown_session(struct nfs_client *clp)
206 if (nfs4_has_session(clp))
207 nfs4_destroy_session(clp->cl_session);
209 #else /* CONFIG_NFS_V4_1 */
210 static void nfs4_shutdown_session(struct nfs_client *clp)
213 #endif /* CONFIG_NFS_V4_1 */
216 * Destroy the NFS4 callback service
218 static void nfs4_destroy_callback(struct nfs_client *clp)
220 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
221 nfs_callback_down(clp->cl_mvops->minor_version);
224 static void nfs4_shutdown_client(struct nfs_client *clp)
226 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
227 nfs4_kill_renewd(clp);
228 nfs4_shutdown_session(clp);
229 nfs4_destroy_callback(clp);
230 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
231 nfs_idmap_delete(clp);
233 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
236 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
237 void nfs_cleanup_cb_ident_idr(void)
239 idr_destroy(&cb_ident_idr);
242 /* nfs_client_lock held */
243 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
245 if (clp->cl_cb_ident)
246 idr_remove(&cb_ident_idr, clp->cl_cb_ident);
249 static void pnfs_init_server(struct nfs_server *server)
251 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
254 static void nfs4_destroy_server(struct nfs_server *server)
256 nfs4_purge_state_owners(server);
260 static void nfs4_shutdown_client(struct nfs_client *clp)
264 void nfs_cleanup_cb_ident_idr(void)
268 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
272 static void pnfs_init_server(struct nfs_server *server)
276 #endif /* CONFIG_NFS_V4 */
279 * Destroy a shared client record
281 static void nfs_free_client(struct nfs_client *clp)
283 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
285 nfs4_shutdown_client(clp);
287 nfs_fscache_release_client_cookie(clp);
289 /* -EIO all pending I/O */
290 if (!IS_ERR(clp->cl_rpcclient))
291 rpc_shutdown_client(clp->cl_rpcclient);
293 if (clp->cl_machine_cred != NULL)
294 put_rpccred(clp->cl_machine_cred);
296 nfs4_deviceid_purge_client(clp);
298 kfree(clp->cl_hostname);
299 kfree(clp->server_scope);
302 dprintk("<-- nfs_free_client()\n");
306 * Release a reference to a shared client record
308 void nfs_put_client(struct nfs_client *clp)
313 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
315 if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) {
316 list_del(&clp->cl_share_link);
317 nfs_cb_idr_remove_locked(clp);
318 spin_unlock(&nfs_client_lock);
320 BUG_ON(!list_empty(&clp->cl_superblocks));
322 nfs_free_client(clp);
325 EXPORT_SYMBOL_GPL(nfs_put_client);
327 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
329 * Test if two ip6 socket addresses refer to the same socket by
330 * comparing relevant fields. The padding bytes specifically, are not
331 * compared. sin6_flowinfo is not compared because it only affects QoS
332 * and sin6_scope_id is only compared if the address is "link local"
333 * because "link local" addresses need only be unique to a specific
334 * link. Conversely, ordinary unicast addresses might have different
337 * The caller should ensure both socket addresses are AF_INET6.
339 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
340 const struct sockaddr *sa2)
342 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
343 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
345 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
347 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
348 return sin1->sin6_scope_id == sin2->sin6_scope_id;
352 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
353 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
354 const struct sockaddr *sa2)
361 * Test if two ip4 socket addresses refer to the same socket, by
362 * comparing relevant fields. The padding bytes specifically, are
365 * The caller should ensure both socket addresses are AF_INET.
367 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
368 const struct sockaddr *sa2)
370 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
371 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
373 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
376 static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
377 const struct sockaddr *sa2)
379 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
380 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
382 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
383 (sin1->sin6_port == sin2->sin6_port);
386 static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
387 const struct sockaddr *sa2)
389 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
390 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
392 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
393 (sin1->sin_port == sin2->sin_port);
397 * Test if two socket addresses represent the same actual socket,
398 * by comparing (only) relevant fields, excluding the port number.
400 static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
401 const struct sockaddr *sa2)
403 if (sa1->sa_family != sa2->sa_family)
406 switch (sa1->sa_family) {
408 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
410 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
416 * Test if two socket addresses represent the same actual socket,
417 * by comparing (only) relevant fields, including the port number.
419 static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
420 const struct sockaddr *sa2)
422 if (sa1->sa_family != sa2->sa_family)
425 switch (sa1->sa_family) {
427 return nfs_sockaddr_cmp_ip4(sa1, sa2);
429 return nfs_sockaddr_cmp_ip6(sa1, sa2);
434 /* Common match routine for v4.0 and v4.1 callback services */
436 nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp,
439 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
441 /* Don't match clients that failed to initialise */
442 if (!(clp->cl_cons_state == NFS_CS_READY ||
443 clp->cl_cons_state == NFS_CS_SESSION_INITING))
446 /* Match the version and minorversion */
447 if (clp->rpc_ops->version != 4 ||
448 clp->cl_minorversion != minorversion)
451 /* Match only the IP address, not the port number */
452 if (!nfs_sockaddr_match_ipaddr(addr, clap))
459 * Find an nfs_client on the list that matches the initialisation data
462 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
464 struct nfs_client *clp;
465 const struct sockaddr *sap = data->addr;
467 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
468 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
469 /* Don't match clients that failed to initialise properly */
470 if (clp->cl_cons_state < 0)
473 /* Different NFS versions cannot share the same nfs_client */
474 if (clp->rpc_ops != data->rpc_ops)
477 if (clp->cl_proto != data->proto)
479 /* Match nfsv4 minorversion */
480 if (clp->cl_minorversion != data->minorversion)
482 /* Match the full socket address */
483 if (!nfs_sockaddr_cmp(sap, clap))
486 atomic_inc(&clp->cl_count);
493 * Look up a client by IP address and protocol version
494 * - creates a new record if one doesn't yet exist
496 static struct nfs_client *
497 nfs_get_client(const struct nfs_client_initdata *cl_init,
498 const struct rpc_timeout *timeparms,
500 rpc_authflavor_t authflavour,
503 struct nfs_client *clp, *new = NULL;
506 dprintk("--> nfs_get_client(%s,v%u)\n",
507 cl_init->hostname ?: "", cl_init->rpc_ops->version);
509 /* see if the client already exists */
511 spin_lock(&nfs_client_lock);
513 clp = nfs_match_client(cl_init);
519 spin_unlock(&nfs_client_lock);
521 new = nfs_alloc_client(cl_init);
522 } while (!IS_ERR(new));
524 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
527 /* install a new client and return with it unready */
530 list_add(&clp->cl_share_link, &nfs_client_list);
531 spin_unlock(&nfs_client_lock);
533 error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
534 authflavour, noresvport);
537 return ERR_PTR(error);
539 dprintk("--> nfs_get_client() = %p [new]\n", clp);
542 /* found an existing client
543 * - make sure it's ready before returning
546 spin_unlock(&nfs_client_lock);
549 nfs_free_client(new);
551 error = wait_event_killable(nfs_client_active_wq,
552 clp->cl_cons_state < NFS_CS_INITING);
555 return ERR_PTR(-ERESTARTSYS);
558 if (clp->cl_cons_state < NFS_CS_READY) {
559 error = clp->cl_cons_state;
561 return ERR_PTR(error);
564 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
566 dprintk("--> nfs_get_client() = %p [share]\n", clp);
571 * Mark a server as ready or failed
573 void nfs_mark_client_ready(struct nfs_client *clp, int state)
575 clp->cl_cons_state = state;
576 wake_up_all(&nfs_client_active_wq);
580 * With sessions, the client is not marked ready until after a
581 * successful EXCHANGE_ID and CREATE_SESSION.
583 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
584 * other versions of NFS can be tried.
586 int nfs4_check_client_ready(struct nfs_client *clp)
588 if (!nfs4_has_session(clp))
590 if (clp->cl_cons_state < NFS_CS_READY)
591 return -EPROTONOSUPPORT;
596 * Initialise the timeout values for a connection
598 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
599 unsigned int timeo, unsigned int retrans)
601 to->to_initval = timeo * HZ / 10;
602 to->to_retries = retrans;
605 case XPRT_TRANSPORT_TCP:
606 case XPRT_TRANSPORT_RDMA:
607 if (to->to_retries == 0)
608 to->to_retries = NFS_DEF_TCP_RETRANS;
609 if (to->to_initval == 0)
610 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
611 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
612 to->to_initval = NFS_MAX_TCP_TIMEOUT;
613 to->to_increment = to->to_initval;
614 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
615 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
616 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
617 if (to->to_maxval < to->to_initval)
618 to->to_maxval = to->to_initval;
619 to->to_exponential = 0;
621 case XPRT_TRANSPORT_UDP:
622 if (to->to_retries == 0)
623 to->to_retries = NFS_DEF_UDP_RETRANS;
625 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
626 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
627 to->to_initval = NFS_MAX_UDP_TIMEOUT;
628 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
629 to->to_exponential = 1;
637 * Create an RPC client handle
639 static int nfs_create_rpc_client(struct nfs_client *clp,
640 const struct rpc_timeout *timeparms,
641 rpc_authflavor_t flavor,
642 int discrtry, int noresvport)
644 struct rpc_clnt *clnt = NULL;
645 struct rpc_create_args args = {
647 .protocol = clp->cl_proto,
648 .address = (struct sockaddr *)&clp->cl_addr,
649 .addrsize = clp->cl_addrlen,
650 .timeout = timeparms,
651 .servername = clp->cl_hostname,
652 .program = &nfs_program,
653 .version = clp->rpc_ops->version,
654 .authflavor = flavor,
658 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
660 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
662 if (!IS_ERR(clp->cl_rpcclient))
665 clnt = rpc_create(&args);
667 dprintk("%s: cannot create RPC client. Error = %ld\n",
668 __func__, PTR_ERR(clnt));
669 return PTR_ERR(clnt);
672 clp->cl_rpcclient = clnt;
677 * Version 2 or 3 client destruction
679 static void nfs_destroy_server(struct nfs_server *server)
681 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
682 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
683 nlmclnt_done(server->nlm_host);
687 * Version 2 or 3 lockd setup
689 static int nfs_start_lockd(struct nfs_server *server)
691 struct nlm_host *host;
692 struct nfs_client *clp = server->nfs_client;
693 struct nlmclnt_initdata nlm_init = {
694 .hostname = clp->cl_hostname,
695 .address = (struct sockaddr *)&clp->cl_addr,
696 .addrlen = clp->cl_addrlen,
697 .nfs_version = clp->rpc_ops->version,
698 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
702 if (nlm_init.nfs_version > 3)
704 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
705 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
708 switch (clp->cl_proto) {
710 nlm_init.protocol = IPPROTO_TCP;
712 case XPRT_TRANSPORT_UDP:
713 nlm_init.protocol = IPPROTO_UDP;
716 host = nlmclnt_init(&nlm_init);
718 return PTR_ERR(host);
720 server->nlm_host = host;
721 server->destroy = nfs_destroy_server;
726 * Initialise an NFSv3 ACL client connection
728 #ifdef CONFIG_NFS_V3_ACL
729 static void nfs_init_server_aclclient(struct nfs_server *server)
731 if (server->nfs_client->rpc_ops->version != 3)
733 if (server->flags & NFS_MOUNT_NOACL)
736 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
737 if (IS_ERR(server->client_acl))
740 /* No errors! Assume that Sun nfsacls are supported */
741 server->caps |= NFS_CAP_ACLS;
745 server->caps &= ~NFS_CAP_ACLS;
748 static inline void nfs_init_server_aclclient(struct nfs_server *server)
750 server->flags &= ~NFS_MOUNT_NOACL;
751 server->caps &= ~NFS_CAP_ACLS;
756 * Create a general RPC client
758 static int nfs_init_server_rpcclient(struct nfs_server *server,
759 const struct rpc_timeout *timeo,
760 rpc_authflavor_t pseudoflavour)
762 struct nfs_client *clp = server->nfs_client;
764 server->client = rpc_clone_client(clp->cl_rpcclient);
765 if (IS_ERR(server->client)) {
766 dprintk("%s: couldn't create rpc_client!\n", __func__);
767 return PTR_ERR(server->client);
770 memcpy(&server->client->cl_timeout_default,
772 sizeof(server->client->cl_timeout_default));
773 server->client->cl_timeout = &server->client->cl_timeout_default;
775 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
776 struct rpc_auth *auth;
778 auth = rpcauth_create(pseudoflavour, server->client);
780 dprintk("%s: couldn't create credcache!\n", __func__);
781 return PTR_ERR(auth);
784 server->client->cl_softrtry = 0;
785 if (server->flags & NFS_MOUNT_SOFT)
786 server->client->cl_softrtry = 1;
792 * Initialise an NFS2 or NFS3 client
794 int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
795 const char *ip_addr, rpc_authflavor_t authflavour,
800 if (clp->cl_cons_state == NFS_CS_READY) {
801 /* the client is already initialised */
802 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
807 * Create a client RPC handle for doing FSSTAT with UNIX auth only
808 * - RFC 2623, sec 2.3.2
810 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
814 nfs_mark_client_ready(clp, NFS_CS_READY);
818 nfs_mark_client_ready(clp, error);
819 dprintk("<-- nfs_init_client() = xerror %d\n", error);
824 * Create a version 2 or 3 client
826 static int nfs_init_server(struct nfs_server *server,
827 const struct nfs_parsed_mount_data *data)
829 struct nfs_client_initdata cl_init = {
830 .hostname = data->nfs_server.hostname,
831 .addr = (const struct sockaddr *)&data->nfs_server.address,
832 .addrlen = data->nfs_server.addrlen,
833 .rpc_ops = &nfs_v2_clientops,
834 .proto = data->nfs_server.protocol,
836 struct rpc_timeout timeparms;
837 struct nfs_client *clp;
840 dprintk("--> nfs_init_server()\n");
843 if (data->version == 3)
844 cl_init.rpc_ops = &nfs_v3_clientops;
847 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
848 data->timeo, data->retrans);
850 /* Allocate or find a client reference we can use */
851 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX,
852 data->flags & NFS_MOUNT_NORESVPORT);
854 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
858 server->nfs_client = clp;
860 /* Initialise the client representation from the mount data */
861 server->flags = data->flags;
862 server->options = data->options;
863 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
864 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
865 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
868 server->rsize = nfs_block_size(data->rsize, NULL);
870 server->wsize = nfs_block_size(data->wsize, NULL);
872 server->acregmin = data->acregmin * HZ;
873 server->acregmax = data->acregmax * HZ;
874 server->acdirmin = data->acdirmin * HZ;
875 server->acdirmax = data->acdirmax * HZ;
877 /* Start lockd here, before we might error out */
878 error = nfs_start_lockd(server);
882 server->port = data->nfs_server.port;
884 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
888 /* Preserve the values of mount_server-related mount options */
889 if (data->mount_server.addrlen) {
890 memcpy(&server->mountd_address, &data->mount_server.address,
891 data->mount_server.addrlen);
892 server->mountd_addrlen = data->mount_server.addrlen;
894 server->mountd_version = data->mount_server.version;
895 server->mountd_port = data->mount_server.port;
896 server->mountd_protocol = data->mount_server.protocol;
898 server->namelen = data->namlen;
899 /* Create a client RPC handle for the NFSv3 ACL management interface */
900 nfs_init_server_aclclient(server);
901 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
905 server->nfs_client = NULL;
907 dprintk("<-- nfs_init_server() = xerror %d\n", error);
912 * Load up the server record from information gained in an fsinfo record
914 static void nfs_server_set_fsinfo(struct nfs_server *server,
915 struct nfs_fh *mntfh,
916 struct nfs_fsinfo *fsinfo)
918 unsigned long max_rpc_payload;
920 /* Work out a lot of parameters */
921 if (server->rsize == 0)
922 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
923 if (server->wsize == 0)
924 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
926 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
927 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
928 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
929 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
931 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
932 if (server->rsize > max_rpc_payload)
933 server->rsize = max_rpc_payload;
934 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
935 server->rsize = NFS_MAX_FILE_IO_SIZE;
936 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
938 server->backing_dev_info.name = "nfs";
939 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
941 if (server->wsize > max_rpc_payload)
942 server->wsize = max_rpc_payload;
943 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
944 server->wsize = NFS_MAX_FILE_IO_SIZE;
945 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
946 server->pnfs_blksize = fsinfo->blksize;
947 set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
949 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
951 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
952 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
953 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
954 if (server->dtsize > server->rsize)
955 server->dtsize = server->rsize;
957 if (server->flags & NFS_MOUNT_NOAC) {
958 server->acregmin = server->acregmax = 0;
959 server->acdirmin = server->acdirmax = 0;
962 server->maxfilesize = fsinfo->maxfilesize;
964 server->time_delta = fsinfo->time_delta;
966 /* We're airborne Set socket buffersize */
967 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
971 * Probe filesystem information, including the FSID on v2/v3
973 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
975 struct nfs_fsinfo fsinfo;
976 struct nfs_client *clp = server->nfs_client;
979 dprintk("--> nfs_probe_fsinfo()\n");
981 if (clp->rpc_ops->set_capabilities != NULL) {
982 error = clp->rpc_ops->set_capabilities(server, mntfh);
987 fsinfo.fattr = fattr;
988 fsinfo.layouttype = 0;
989 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
993 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
995 /* Get some general file system info */
996 if (server->namelen == 0) {
997 struct nfs_pathconf pathinfo;
999 pathinfo.fattr = fattr;
1000 nfs_fattr_init(fattr);
1002 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
1003 server->namelen = pathinfo.max_namelen;
1006 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1010 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1015 * Copy useful information when duplicating a server record
1017 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1019 target->flags = source->flags;
1020 target->rsize = source->rsize;
1021 target->wsize = source->wsize;
1022 target->acregmin = source->acregmin;
1023 target->acregmax = source->acregmax;
1024 target->acdirmin = source->acdirmin;
1025 target->acdirmax = source->acdirmax;
1026 target->caps = source->caps;
1027 target->options = source->options;
1030 static void nfs_server_insert_lists(struct nfs_server *server)
1032 struct nfs_client *clp = server->nfs_client;
1034 spin_lock(&nfs_client_lock);
1035 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
1036 list_add_tail(&server->master_link, &nfs_volume_list);
1037 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1038 spin_unlock(&nfs_client_lock);
1042 static void nfs_server_remove_lists(struct nfs_server *server)
1044 struct nfs_client *clp = server->nfs_client;
1046 spin_lock(&nfs_client_lock);
1047 list_del_rcu(&server->client_link);
1048 if (clp && list_empty(&clp->cl_superblocks))
1049 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1050 list_del(&server->master_link);
1051 spin_unlock(&nfs_client_lock);
1057 * Allocate and initialise a server record
1059 static struct nfs_server *nfs_alloc_server(void)
1061 struct nfs_server *server;
1063 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1067 server->client = server->client_acl = ERR_PTR(-EINVAL);
1069 /* Zero out the NFS state stuff */
1070 INIT_LIST_HEAD(&server->client_link);
1071 INIT_LIST_HEAD(&server->master_link);
1072 INIT_LIST_HEAD(&server->delegations);
1073 INIT_LIST_HEAD(&server->layouts);
1074 INIT_LIST_HEAD(&server->state_owners_lru);
1076 atomic_set(&server->active, 0);
1078 server->io_stats = nfs_alloc_iostats();
1079 if (!server->io_stats) {
1084 if (bdi_init(&server->backing_dev_info)) {
1085 nfs_free_iostats(server->io_stats);
1090 pnfs_init_server(server);
1096 * Free up a server record
1098 void nfs_free_server(struct nfs_server *server)
1100 dprintk("--> nfs_free_server()\n");
1102 nfs_server_remove_lists(server);
1103 unset_pnfs_layoutdriver(server);
1105 if (server->destroy != NULL)
1106 server->destroy(server);
1108 if (!IS_ERR(server->client_acl))
1109 rpc_shutdown_client(server->client_acl);
1110 if (!IS_ERR(server->client))
1111 rpc_shutdown_client(server->client);
1113 nfs_put_client(server->nfs_client);
1115 nfs_free_iostats(server->io_stats);
1116 bdi_destroy(&server->backing_dev_info);
1118 nfs_release_automount_timer();
1119 dprintk("<-- nfs_free_server()\n");
1123 * Create a version 2 or 3 volume record
1124 * - keyed on server and FSID
1126 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1127 struct nfs_fh *mntfh)
1129 struct nfs_server *server;
1130 struct nfs_fattr *fattr;
1133 server = nfs_alloc_server();
1135 return ERR_PTR(-ENOMEM);
1138 fattr = nfs_alloc_fattr();
1142 /* Get a client representation */
1143 error = nfs_init_server(server, data);
1147 BUG_ON(!server->nfs_client);
1148 BUG_ON(!server->nfs_client->rpc_ops);
1149 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1151 /* Probe the root fh to retrieve its FSID */
1152 error = nfs_probe_fsinfo(server, mntfh, fattr);
1155 if (server->nfs_client->rpc_ops->version == 3) {
1156 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1157 server->namelen = NFS3_MAXNAMLEN;
1158 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1159 server->caps |= NFS_CAP_READDIRPLUS;
1161 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1162 server->namelen = NFS2_MAXNAMLEN;
1165 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1166 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
1168 dprintk("nfs_create_server: getattr error = %d\n", -error);
1172 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
1174 dprintk("Server FSID: %llx:%llx\n",
1175 (unsigned long long) server->fsid.major,
1176 (unsigned long long) server->fsid.minor);
1178 nfs_server_insert_lists(server);
1179 server->mount_time = jiffies;
1180 nfs_free_fattr(fattr);
1184 nfs_free_fattr(fattr);
1185 nfs_free_server(server);
1186 return ERR_PTR(error);
1189 #ifdef CONFIG_NFS_V4
1191 * NFSv4.0 callback thread helper
1193 * Find a client by IP address, protocol version, and minorversion
1195 * Called from the pg_authenticate method. The callback identifier
1196 * is not used as it has not been decoded.
1198 * Returns NULL if no such client
1201 nfs4_find_client_no_ident(const struct sockaddr *addr)
1203 struct nfs_client *clp;
1205 spin_lock(&nfs_client_lock);
1206 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
1207 if (nfs4_cb_match_client(addr, clp, 0) == false)
1209 atomic_inc(&clp->cl_count);
1210 spin_unlock(&nfs_client_lock);
1213 spin_unlock(&nfs_client_lock);
1218 * NFSv4.0 callback thread helper
1220 * Find a client by callback identifier
1223 nfs4_find_client_ident(int cb_ident)
1225 struct nfs_client *clp;
1227 spin_lock(&nfs_client_lock);
1228 clp = idr_find(&cb_ident_idr, cb_ident);
1230 atomic_inc(&clp->cl_count);
1231 spin_unlock(&nfs_client_lock);
1235 #if defined(CONFIG_NFS_V4_1)
1237 * NFSv4.1 callback thread helper
1238 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1239 * minorversion, and sessionID
1241 * Returns NULL if no such client
1244 nfs4_find_client_sessionid(const struct sockaddr *addr,
1245 struct nfs4_sessionid *sid)
1247 struct nfs_client *clp;
1249 spin_lock(&nfs_client_lock);
1250 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
1251 if (nfs4_cb_match_client(addr, clp, 1) == false)
1254 if (!nfs4_has_session(clp))
1257 /* Match sessionid*/
1258 if (memcmp(clp->cl_session->sess_id.data,
1259 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
1262 atomic_inc(&clp->cl_count);
1263 spin_unlock(&nfs_client_lock);
1266 spin_unlock(&nfs_client_lock);
1270 #else /* CONFIG_NFS_V4_1 */
1273 nfs4_find_client_sessionid(const struct sockaddr *addr,
1274 struct nfs4_sessionid *sid)
1278 #endif /* CONFIG_NFS_V4_1 */
1281 * Initialize the NFS4 callback service
1283 static int nfs4_init_callback(struct nfs_client *clp)
1287 if (clp->rpc_ops->version == 4) {
1288 if (nfs4_has_session(clp)) {
1289 error = xprt_setup_backchannel(
1290 clp->cl_rpcclient->cl_xprt,
1291 NFS41_BC_MIN_CALLBACKS);
1296 error = nfs_callback_up(clp->cl_mvops->minor_version,
1297 clp->cl_rpcclient->cl_xprt);
1299 dprintk("%s: failed to start callback. Error = %d\n",
1303 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1309 * Initialize the minor version specific parts of an NFS4 client record
1311 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1313 #if defined(CONFIG_NFS_V4_1)
1314 if (clp->cl_mvops->minor_version) {
1315 struct nfs4_session *session = NULL;
1317 * Create the session and mark it expired.
1318 * When a SEQUENCE operation encounters the expired session
1319 * it will do session recovery to initialize it.
1321 session = nfs4_alloc_session(clp);
1325 clp->cl_session = session;
1327 * The create session reply races with the server back
1328 * channel probe. Mark the client NFS_CS_SESSION_INITING
1329 * so that the client back channel can find the
1332 clp->cl_cons_state = NFS_CS_SESSION_INITING;
1334 #endif /* CONFIG_NFS_V4_1 */
1336 return nfs4_init_callback(clp);
1340 * Initialise an NFS4 client record
1342 int nfs4_init_client(struct nfs_client *clp,
1343 const struct rpc_timeout *timeparms,
1344 const char *ip_addr,
1345 rpc_authflavor_t authflavour,
1350 if (clp->cl_cons_state == NFS_CS_READY) {
1351 /* the client is initialised already */
1352 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1356 /* Check NFS protocol revision and initialize RPC op vector */
1357 clp->rpc_ops = &nfs_v4_clientops;
1359 error = nfs_create_rpc_client(clp, timeparms, authflavour,
1363 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1365 error = nfs_idmap_new(clp);
1367 dprintk("%s: failed to create idmapper. Error = %d\n",
1371 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1373 error = nfs4_init_client_minor_version(clp);
1377 if (!nfs4_has_session(clp))
1378 nfs_mark_client_ready(clp, NFS_CS_READY);
1382 nfs_mark_client_ready(clp, error);
1383 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1388 * Set up an NFS4 client
1390 static int nfs4_set_client(struct nfs_server *server,
1391 const char *hostname,
1392 const struct sockaddr *addr,
1393 const size_t addrlen,
1394 const char *ip_addr,
1395 rpc_authflavor_t authflavour,
1396 int proto, const struct rpc_timeout *timeparms,
1399 struct nfs_client_initdata cl_init = {
1400 .hostname = hostname,
1403 .rpc_ops = &nfs_v4_clientops,
1405 .minorversion = minorversion,
1407 struct nfs_client *clp;
1410 dprintk("--> nfs4_set_client()\n");
1412 /* Allocate or find a client reference we can use */
1413 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour,
1414 server->flags & NFS_MOUNT_NORESVPORT);
1416 error = PTR_ERR(clp);
1421 * Query for the lease time on clientid setup or renewal
1423 * Note that this will be set on nfs_clients that were created
1424 * only for the DS role and did not set this bit, but now will
1425 * serve a dual role.
1427 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1429 server->nfs_client = clp;
1430 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1433 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1438 * Set up a pNFS Data Server client.
1440 * Return any existing nfs_client that matches server address,port,version
1443 * For a new nfs_client, use a soft mount (default), a low retrans and a
1444 * low timeout interval so that if a connection is lost, we retry through
1447 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1448 const struct sockaddr *ds_addr,
1449 int ds_addrlen, int ds_proto)
1451 struct nfs_client_initdata cl_init = {
1453 .addrlen = ds_addrlen,
1454 .rpc_ops = &nfs_v4_clientops,
1456 .minorversion = mds_clp->cl_minorversion,
1458 struct rpc_timeout ds_timeout = {
1459 .to_initval = 15 * HZ,
1460 .to_maxval = 15 * HZ,
1462 .to_exponential = 1,
1464 struct nfs_client *clp;
1467 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1468 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1469 * (section 13.1 RFC 5661).
1471 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1472 mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
1474 dprintk("<-- %s %p\n", __func__, clp);
1477 EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
1480 * Session has been established, and the client marked ready.
1481 * Set the mount rsize and wsize with negotiated fore channel
1482 * attributes which will be bound checked in nfs_server_set_fsinfo.
1484 static void nfs4_session_set_rwsize(struct nfs_server *server)
1486 #ifdef CONFIG_NFS_V4_1
1487 struct nfs4_session *sess;
1491 if (!nfs4_has_session(server->nfs_client))
1493 sess = server->nfs_client->cl_session;
1494 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1495 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1497 if (server->rsize > server_resp_sz)
1498 server->rsize = server_resp_sz;
1499 if (server->wsize > server_rqst_sz)
1500 server->wsize = server_rqst_sz;
1501 #endif /* CONFIG_NFS_V4_1 */
1504 static int nfs4_server_common_setup(struct nfs_server *server,
1505 struct nfs_fh *mntfh)
1507 struct nfs_fattr *fattr;
1510 BUG_ON(!server->nfs_client);
1511 BUG_ON(!server->nfs_client->rpc_ops);
1512 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1514 /* data servers support only a subset of NFSv4.1 */
1515 if (is_ds_only_client(server->nfs_client))
1516 return -EPROTONOSUPPORT;
1518 fattr = nfs_alloc_fattr();
1522 /* We must ensure the session is initialised first */
1523 error = nfs4_init_session(server);
1527 /* Probe the root fh to retrieve its FSID and filehandle */
1528 error = nfs4_get_rootfh(server, mntfh);
1532 dprintk("Server FSID: %llx:%llx\n",
1533 (unsigned long long) server->fsid.major,
1534 (unsigned long long) server->fsid.minor);
1535 dprintk("Mount FH: %d\n", mntfh->size);
1537 nfs4_session_set_rwsize(server);
1539 error = nfs_probe_fsinfo(server, mntfh, fattr);
1543 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1544 server->namelen = NFS4_MAXNAMLEN;
1546 nfs_server_insert_lists(server);
1547 server->mount_time = jiffies;
1548 server->destroy = nfs4_destroy_server;
1550 nfs_free_fattr(fattr);
1555 * Create a version 4 volume record
1557 static int nfs4_init_server(struct nfs_server *server,
1558 const struct nfs_parsed_mount_data *data)
1560 struct rpc_timeout timeparms;
1563 dprintk("--> nfs4_init_server()\n");
1565 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1566 data->timeo, data->retrans);
1568 /* Initialise the client representation from the mount data */
1569 server->flags = data->flags;
1570 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1571 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1572 server->caps |= NFS_CAP_READDIRPLUS;
1573 server->options = data->options;
1575 /* Get a client record */
1576 error = nfs4_set_client(server,
1577 data->nfs_server.hostname,
1578 (const struct sockaddr *)&data->nfs_server.address,
1579 data->nfs_server.addrlen,
1580 data->client_address,
1581 data->auth_flavors[0],
1582 data->nfs_server.protocol,
1584 data->minorversion);
1589 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1592 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1593 server->caps |= NFS_CAP_UIDGID_NOMAP;
1596 server->rsize = nfs_block_size(data->rsize, NULL);
1598 server->wsize = nfs_block_size(data->wsize, NULL);
1600 server->acregmin = data->acregmin * HZ;
1601 server->acregmax = data->acregmax * HZ;
1602 server->acdirmin = data->acdirmin * HZ;
1603 server->acdirmax = data->acdirmax * HZ;
1605 server->port = data->nfs_server.port;
1607 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1611 dprintk("<-- nfs4_init_server() = %d\n", error);
1616 * Create a version 4 volume record
1617 * - keyed on server and FSID
1619 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1620 struct nfs_fh *mntfh)
1622 struct nfs_server *server;
1625 dprintk("--> nfs4_create_server()\n");
1627 server = nfs_alloc_server();
1629 return ERR_PTR(-ENOMEM);
1631 /* set up the general RPC client */
1632 error = nfs4_init_server(server, data);
1636 error = nfs4_server_common_setup(server, mntfh);
1640 dprintk("<-- nfs4_create_server() = %p\n", server);
1644 nfs_free_server(server);
1645 dprintk("<-- nfs4_create_server() = error %d\n", error);
1646 return ERR_PTR(error);
1650 * Create an NFS4 referral server record
1652 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1653 struct nfs_fh *mntfh)
1655 struct nfs_client *parent_client;
1656 struct nfs_server *server, *parent_server;
1659 dprintk("--> nfs4_create_referral_server()\n");
1661 server = nfs_alloc_server();
1663 return ERR_PTR(-ENOMEM);
1665 parent_server = NFS_SB(data->sb);
1666 parent_client = parent_server->nfs_client;
1668 /* Initialise the client representation from the parent server */
1669 nfs_server_copy_userdata(server, parent_server);
1670 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
1672 /* Get a client representation.
1673 * Note: NFSv4 always uses TCP, */
1674 error = nfs4_set_client(server, data->hostname,
1677 parent_client->cl_ipaddr,
1679 parent_server->client->cl_xprt->prot,
1680 parent_server->client->cl_timeout,
1681 parent_client->cl_mvops->minor_version);
1685 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1689 error = nfs4_server_common_setup(server, mntfh);
1693 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1697 nfs_free_server(server);
1698 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1699 return ERR_PTR(error);
1702 #endif /* CONFIG_NFS_V4 */
1705 * Clone an NFS2, NFS3 or NFS4 server record
1707 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1709 struct nfs_fattr *fattr)
1711 struct nfs_server *server;
1712 struct nfs_fattr *fattr_fsinfo;
1715 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1716 (unsigned long long) fattr->fsid.major,
1717 (unsigned long long) fattr->fsid.minor);
1719 server = nfs_alloc_server();
1721 return ERR_PTR(-ENOMEM);
1724 fattr_fsinfo = nfs_alloc_fattr();
1725 if (fattr_fsinfo == NULL)
1726 goto out_free_server;
1728 /* Copy data from the source */
1729 server->nfs_client = source->nfs_client;
1730 server->destroy = source->destroy;
1731 atomic_inc(&server->nfs_client->cl_count);
1732 nfs_server_copy_userdata(server, source);
1734 server->fsid = fattr->fsid;
1736 error = nfs_init_server_rpcclient(server,
1737 source->client->cl_timeout,
1738 source->client->cl_auth->au_flavor);
1740 goto out_free_server;
1741 if (!IS_ERR(source->client_acl))
1742 nfs_init_server_aclclient(server);
1744 /* probe the filesystem info for this server filesystem */
1745 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1747 goto out_free_server;
1749 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1750 server->namelen = NFS4_MAXNAMLEN;
1752 dprintk("Cloned FSID: %llx:%llx\n",
1753 (unsigned long long) server->fsid.major,
1754 (unsigned long long) server->fsid.minor);
1756 error = nfs_start_lockd(server);
1758 goto out_free_server;
1760 nfs_server_insert_lists(server);
1761 server->mount_time = jiffies;
1763 nfs_free_fattr(fattr_fsinfo);
1764 dprintk("<-- nfs_clone_server() = %p\n", server);
1768 nfs_free_fattr(fattr_fsinfo);
1769 nfs_free_server(server);
1770 dprintk("<-- nfs_clone_server() = error %d\n", error);
1771 return ERR_PTR(error);
1774 #ifdef CONFIG_PROC_FS
1775 static struct proc_dir_entry *proc_fs_nfs;
1777 static int nfs_server_list_open(struct inode *inode, struct file *file);
1778 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1779 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1780 static void nfs_server_list_stop(struct seq_file *p, void *v);
1781 static int nfs_server_list_show(struct seq_file *m, void *v);
1783 static const struct seq_operations nfs_server_list_ops = {
1784 .start = nfs_server_list_start,
1785 .next = nfs_server_list_next,
1786 .stop = nfs_server_list_stop,
1787 .show = nfs_server_list_show,
1790 static const struct file_operations nfs_server_list_fops = {
1791 .open = nfs_server_list_open,
1793 .llseek = seq_lseek,
1794 .release = seq_release,
1795 .owner = THIS_MODULE,
1798 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1799 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1800 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1801 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1802 static int nfs_volume_list_show(struct seq_file *m, void *v);
1804 static const struct seq_operations nfs_volume_list_ops = {
1805 .start = nfs_volume_list_start,
1806 .next = nfs_volume_list_next,
1807 .stop = nfs_volume_list_stop,
1808 .show = nfs_volume_list_show,
1811 static const struct file_operations nfs_volume_list_fops = {
1812 .open = nfs_volume_list_open,
1814 .llseek = seq_lseek,
1815 .release = seq_release,
1816 .owner = THIS_MODULE,
1820 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1823 static int nfs_server_list_open(struct inode *inode, struct file *file)
1828 ret = seq_open(file, &nfs_server_list_ops);
1832 m = file->private_data;
1833 m->private = PDE(inode)->data;
1839 * set up the iterator to start reading from the server list and return the first item
1841 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1843 /* lock the list against modification */
1844 spin_lock(&nfs_client_lock);
1845 return seq_list_start_head(&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 return seq_list_next(v, &nfs_client_list, pos);
1857 * clean up after reading from the transports list
1859 static void nfs_server_list_stop(struct seq_file *p, void *v)
1861 spin_unlock(&nfs_client_lock);
1865 * display a header line followed by a load of call lines
1867 static int nfs_server_list_show(struct seq_file *m, void *v)
1869 struct nfs_client *clp;
1871 /* display header on line 1 */
1872 if (v == &nfs_client_list) {
1873 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1877 /* display one transport per line on subsequent lines */
1878 clp = list_entry(v, struct nfs_client, cl_share_link);
1880 /* Check if the client is initialized */
1881 if (clp->cl_cons_state != NFS_CS_READY)
1884 seq_printf(m, "v%u %s %s %3d %s\n",
1885 clp->rpc_ops->version,
1886 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1887 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1888 atomic_read(&clp->cl_count),
1895 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1897 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1902 ret = seq_open(file, &nfs_volume_list_ops);
1906 m = file->private_data;
1907 m->private = PDE(inode)->data;
1913 * set up the iterator to start reading from the volume list and return the first item
1915 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1917 /* lock the list against modification */
1918 spin_lock(&nfs_client_lock);
1919 return seq_list_start_head(&nfs_volume_list, *_pos);
1923 * move to next volume
1925 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1927 return seq_list_next(v, &nfs_volume_list, pos);
1931 * clean up after reading from the transports list
1933 static void nfs_volume_list_stop(struct seq_file *p, void *v)
1935 spin_unlock(&nfs_client_lock);
1939 * display a header line followed by a load of call lines
1941 static int nfs_volume_list_show(struct seq_file *m, void *v)
1943 struct nfs_server *server;
1944 struct nfs_client *clp;
1945 char dev[8], fsid[17];
1947 /* display header on line 1 */
1948 if (v == &nfs_volume_list) {
1949 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
1952 /* display one transport per line on subsequent lines */
1953 server = list_entry(v, struct nfs_server, master_link);
1954 clp = server->nfs_client;
1956 snprintf(dev, 8, "%u:%u",
1957 MAJOR(server->s_dev), MINOR(server->s_dev));
1959 snprintf(fsid, 17, "%llx:%llx",
1960 (unsigned long long) server->fsid.major,
1961 (unsigned long long) server->fsid.minor);
1963 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
1964 clp->rpc_ops->version,
1965 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1966 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1969 nfs_server_fscache_state(server));
1975 * initialise the /proc/fs/nfsfs/ directory
1977 int __init nfs_fs_proc_init(void)
1979 struct proc_dir_entry *p;
1981 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
1985 /* a file of servers with which we're dealing */
1986 p = proc_create("servers", S_IFREG|S_IRUGO,
1987 proc_fs_nfs, &nfs_server_list_fops);
1991 /* a file of volumes that we have mounted */
1992 p = proc_create("volumes", S_IFREG|S_IRUGO,
1993 proc_fs_nfs, &nfs_volume_list_fops);
1999 remove_proc_entry("servers", proc_fs_nfs);
2001 remove_proc_entry("fs/nfsfs", NULL);
2007 * clean up the /proc/fs/nfsfs/ directory
2009 void nfs_fs_proc_exit(void)
2011 remove_proc_entry("volumes", proc_fs_nfs);
2012 remove_proc_entry("servers", proc_fs_nfs);
2013 remove_proc_entry("fs/nfsfs", NULL);
2016 #endif /* CONFIG_PROC_FS */
2018 module_param(nfs4_disable_idmapping, bool, 0644);
2019 MODULE_PARM_DESC(nfs4_disable_idmapping,
2020 "Turn off NFSv4 idmapping when using 'sec=sys'");