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",
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 #if defined(CONFIG_NFS_V4_1)
192 INIT_LIST_HEAD(&clp->cl_layouts);
194 nfs_fscache_get_client_cookie(clp);
205 #ifdef CONFIG_NFS_V4_1
206 static void nfs4_shutdown_session(struct nfs_client *clp)
208 if (nfs4_has_session(clp))
209 nfs4_destroy_session(clp->cl_session);
211 #else /* CONFIG_NFS_V4_1 */
212 static void nfs4_shutdown_session(struct nfs_client *clp)
215 #endif /* CONFIG_NFS_V4_1 */
218 * Destroy the NFS4 callback service
220 static void nfs4_destroy_callback(struct nfs_client *clp)
222 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
223 nfs_callback_down(clp->cl_mvops->minor_version);
226 static void nfs4_shutdown_client(struct nfs_client *clp)
228 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
229 nfs4_kill_renewd(clp);
230 nfs4_shutdown_session(clp);
231 nfs4_destroy_callback(clp);
232 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
233 nfs_idmap_delete(clp);
235 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
238 /* idr_remove_all is not needed as all id's are removed by nfs_put_client */
239 void nfs_cleanup_cb_ident_idr(void)
241 idr_destroy(&cb_ident_idr);
244 /* nfs_client_lock held */
245 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
247 if (clp->cl_cb_ident)
248 idr_remove(&cb_ident_idr, clp->cl_cb_ident);
251 static void pnfs_init_server(struct nfs_server *server)
253 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
257 static void nfs4_shutdown_client(struct nfs_client *clp)
261 void nfs_cleanup_cb_ident_idr(void)
265 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
269 static void pnfs_init_server(struct nfs_server *server)
273 #endif /* CONFIG_NFS_V4 */
276 * Destroy a shared client record
278 static void nfs_free_client(struct nfs_client *clp)
280 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
282 nfs4_shutdown_client(clp);
284 nfs_fscache_release_client_cookie(clp);
286 /* -EIO all pending I/O */
287 if (!IS_ERR(clp->cl_rpcclient))
288 rpc_shutdown_client(clp->cl_rpcclient);
290 if (clp->cl_machine_cred != NULL)
291 put_rpccred(clp->cl_machine_cred);
293 nfs4_deviceid_purge_client(clp);
295 kfree(clp->cl_hostname);
296 kfree(clp->server_scope);
299 dprintk("<-- nfs_free_client()\n");
303 * Release a reference to a shared client record
305 void nfs_put_client(struct nfs_client *clp)
310 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
312 if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) {
313 list_del(&clp->cl_share_link);
314 nfs_cb_idr_remove_locked(clp);
315 spin_unlock(&nfs_client_lock);
317 BUG_ON(!list_empty(&clp->cl_superblocks));
319 nfs_free_client(clp);
322 EXPORT_SYMBOL_GPL(nfs_put_client);
324 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
326 * Test if two ip6 socket addresses refer to the same socket by
327 * comparing relevant fields. The padding bytes specifically, are not
328 * compared. sin6_flowinfo is not compared because it only affects QoS
329 * and sin6_scope_id is only compared if the address is "link local"
330 * because "link local" addresses need only be unique to a specific
331 * link. Conversely, ordinary unicast addresses might have different
334 * The caller should ensure both socket addresses are AF_INET6.
336 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
337 const struct sockaddr *sa2)
339 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
340 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
342 if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL &&
343 sin1->sin6_scope_id != sin2->sin6_scope_id)
346 return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr);
348 #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
349 static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
350 const struct sockaddr *sa2)
357 * Test if two ip4 socket addresses refer to the same socket, by
358 * comparing relevant fields. The padding bytes specifically, are
361 * The caller should ensure both socket addresses are AF_INET.
363 static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
364 const struct sockaddr *sa2)
366 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
367 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
369 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
372 static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
373 const struct sockaddr *sa2)
375 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
376 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
378 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
379 (sin1->sin6_port == sin2->sin6_port);
382 static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
383 const struct sockaddr *sa2)
385 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
386 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
388 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
389 (sin1->sin_port == sin2->sin_port);
393 * Test if two socket addresses represent the same actual socket,
394 * by comparing (only) relevant fields, excluding the port number.
396 static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
397 const struct sockaddr *sa2)
399 if (sa1->sa_family != sa2->sa_family)
402 switch (sa1->sa_family) {
404 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
406 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
412 * Test if two socket addresses represent the same actual socket,
413 * by comparing (only) relevant fields, including the port number.
415 static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
416 const struct sockaddr *sa2)
418 if (sa1->sa_family != sa2->sa_family)
421 switch (sa1->sa_family) {
423 return nfs_sockaddr_cmp_ip4(sa1, sa2);
425 return nfs_sockaddr_cmp_ip6(sa1, sa2);
430 /* Common match routine for v4.0 and v4.1 callback services */
432 nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp,
435 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
437 /* Don't match clients that failed to initialise */
438 if (!(clp->cl_cons_state == NFS_CS_READY ||
439 clp->cl_cons_state == NFS_CS_SESSION_INITING))
442 /* Match the version and minorversion */
443 if (clp->rpc_ops->version != 4 ||
444 clp->cl_minorversion != minorversion)
447 /* Match only the IP address, not the port number */
448 if (!nfs_sockaddr_match_ipaddr(addr, clap))
455 * Find an nfs_client on the list that matches the initialisation data
458 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
460 struct nfs_client *clp;
461 const struct sockaddr *sap = data->addr;
463 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
464 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
465 /* Don't match clients that failed to initialise properly */
466 if (clp->cl_cons_state < 0)
469 /* Different NFS versions cannot share the same nfs_client */
470 if (clp->rpc_ops != data->rpc_ops)
473 if (clp->cl_proto != data->proto)
475 /* Match nfsv4 minorversion */
476 if (clp->cl_minorversion != data->minorversion)
478 /* Match the full socket address */
479 if (!nfs_sockaddr_cmp(sap, clap))
482 atomic_inc(&clp->cl_count);
489 * Look up a client by IP address and protocol version
490 * - creates a new record if one doesn't yet exist
492 static struct nfs_client *
493 nfs_get_client(const struct nfs_client_initdata *cl_init,
494 const struct rpc_timeout *timeparms,
496 rpc_authflavor_t authflavour,
499 struct nfs_client *clp, *new = NULL;
502 dprintk("--> nfs_get_client(%s,v%u)\n",
503 cl_init->hostname ?: "", cl_init->rpc_ops->version);
505 /* see if the client already exists */
507 spin_lock(&nfs_client_lock);
509 clp = nfs_match_client(cl_init);
515 spin_unlock(&nfs_client_lock);
517 new = nfs_alloc_client(cl_init);
518 } while (!IS_ERR(new));
520 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
523 /* install a new client and return with it unready */
526 list_add(&clp->cl_share_link, &nfs_client_list);
527 spin_unlock(&nfs_client_lock);
529 error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
530 authflavour, noresvport);
533 return ERR_PTR(error);
535 dprintk("--> nfs_get_client() = %p [new]\n", clp);
538 /* found an existing client
539 * - make sure it's ready before returning
542 spin_unlock(&nfs_client_lock);
545 nfs_free_client(new);
547 error = wait_event_killable(nfs_client_active_wq,
548 clp->cl_cons_state < NFS_CS_INITING);
551 return ERR_PTR(-ERESTARTSYS);
554 if (clp->cl_cons_state < NFS_CS_READY) {
555 error = clp->cl_cons_state;
557 return ERR_PTR(error);
560 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
562 dprintk("--> nfs_get_client() = %p [share]\n", clp);
567 * Mark a server as ready or failed
569 void nfs_mark_client_ready(struct nfs_client *clp, int state)
571 clp->cl_cons_state = state;
572 wake_up_all(&nfs_client_active_wq);
576 * With sessions, the client is not marked ready until after a
577 * successful EXCHANGE_ID and CREATE_SESSION.
579 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
580 * other versions of NFS can be tried.
582 int nfs4_check_client_ready(struct nfs_client *clp)
584 if (!nfs4_has_session(clp))
586 if (clp->cl_cons_state < NFS_CS_READY)
587 return -EPROTONOSUPPORT;
592 * Initialise the timeout values for a connection
594 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
595 unsigned int timeo, unsigned int retrans)
597 to->to_initval = timeo * HZ / 10;
598 to->to_retries = retrans;
601 case XPRT_TRANSPORT_TCP:
602 case XPRT_TRANSPORT_RDMA:
603 if (to->to_retries == 0)
604 to->to_retries = NFS_DEF_TCP_RETRANS;
605 if (to->to_initval == 0)
606 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
607 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
608 to->to_initval = NFS_MAX_TCP_TIMEOUT;
609 to->to_increment = to->to_initval;
610 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
611 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
612 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
613 if (to->to_maxval < to->to_initval)
614 to->to_maxval = to->to_initval;
615 to->to_exponential = 0;
617 case XPRT_TRANSPORT_UDP:
618 if (to->to_retries == 0)
619 to->to_retries = NFS_DEF_UDP_RETRANS;
621 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
622 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
623 to->to_initval = NFS_MAX_UDP_TIMEOUT;
624 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
625 to->to_exponential = 1;
633 * Create an RPC client handle
635 static int nfs_create_rpc_client(struct nfs_client *clp,
636 const struct rpc_timeout *timeparms,
637 rpc_authflavor_t flavor,
638 int discrtry, int noresvport)
640 struct rpc_clnt *clnt = NULL;
641 struct rpc_create_args args = {
643 .protocol = clp->cl_proto,
644 .address = (struct sockaddr *)&clp->cl_addr,
645 .addrsize = clp->cl_addrlen,
646 .timeout = timeparms,
647 .servername = clp->cl_hostname,
648 .program = &nfs_program,
649 .version = clp->rpc_ops->version,
650 .authflavor = flavor,
654 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
656 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
658 if (!IS_ERR(clp->cl_rpcclient))
661 clnt = rpc_create(&args);
663 dprintk("%s: cannot create RPC client. Error = %ld\n",
664 __func__, PTR_ERR(clnt));
665 return PTR_ERR(clnt);
668 clp->cl_rpcclient = clnt;
673 * Version 2 or 3 client destruction
675 static void nfs_destroy_server(struct nfs_server *server)
677 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
678 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
679 nlmclnt_done(server->nlm_host);
683 * Version 2 or 3 lockd setup
685 static int nfs_start_lockd(struct nfs_server *server)
687 struct nlm_host *host;
688 struct nfs_client *clp = server->nfs_client;
689 struct nlmclnt_initdata nlm_init = {
690 .hostname = clp->cl_hostname,
691 .address = (struct sockaddr *)&clp->cl_addr,
692 .addrlen = clp->cl_addrlen,
693 .nfs_version = clp->rpc_ops->version,
694 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
698 if (nlm_init.nfs_version > 3)
700 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
701 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
704 switch (clp->cl_proto) {
706 nlm_init.protocol = IPPROTO_TCP;
708 case XPRT_TRANSPORT_UDP:
709 nlm_init.protocol = IPPROTO_UDP;
712 host = nlmclnt_init(&nlm_init);
714 return PTR_ERR(host);
716 server->nlm_host = host;
717 server->destroy = nfs_destroy_server;
722 * Initialise an NFSv3 ACL client connection
724 #ifdef CONFIG_NFS_V3_ACL
725 static void nfs_init_server_aclclient(struct nfs_server *server)
727 if (server->nfs_client->rpc_ops->version != 3)
729 if (server->flags & NFS_MOUNT_NOACL)
732 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
733 if (IS_ERR(server->client_acl))
736 /* No errors! Assume that Sun nfsacls are supported */
737 server->caps |= NFS_CAP_ACLS;
741 server->caps &= ~NFS_CAP_ACLS;
744 static inline void nfs_init_server_aclclient(struct nfs_server *server)
746 server->flags &= ~NFS_MOUNT_NOACL;
747 server->caps &= ~NFS_CAP_ACLS;
752 * Create a general RPC client
754 static int nfs_init_server_rpcclient(struct nfs_server *server,
755 const struct rpc_timeout *timeo,
756 rpc_authflavor_t pseudoflavour)
758 struct nfs_client *clp = server->nfs_client;
760 server->client = rpc_clone_client(clp->cl_rpcclient);
761 if (IS_ERR(server->client)) {
762 dprintk("%s: couldn't create rpc_client!\n", __func__);
763 return PTR_ERR(server->client);
766 memcpy(&server->client->cl_timeout_default,
768 sizeof(server->client->cl_timeout_default));
769 server->client->cl_timeout = &server->client->cl_timeout_default;
771 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
772 struct rpc_auth *auth;
774 auth = rpcauth_create(pseudoflavour, server->client);
776 dprintk("%s: couldn't create credcache!\n", __func__);
777 return PTR_ERR(auth);
780 server->client->cl_softrtry = 0;
781 if (server->flags & NFS_MOUNT_SOFT)
782 server->client->cl_softrtry = 1;
788 * Initialise an NFS2 or NFS3 client
790 int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
791 const char *ip_addr, rpc_authflavor_t authflavour,
796 if (clp->cl_cons_state == NFS_CS_READY) {
797 /* the client is already initialised */
798 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
803 * Create a client RPC handle for doing FSSTAT with UNIX auth only
804 * - RFC 2623, sec 2.3.2
806 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
810 nfs_mark_client_ready(clp, NFS_CS_READY);
814 nfs_mark_client_ready(clp, error);
815 dprintk("<-- nfs_init_client() = xerror %d\n", error);
820 * Create a version 2 or 3 client
822 static int nfs_init_server(struct nfs_server *server,
823 const struct nfs_parsed_mount_data *data)
825 struct nfs_client_initdata cl_init = {
826 .hostname = data->nfs_server.hostname,
827 .addr = (const struct sockaddr *)&data->nfs_server.address,
828 .addrlen = data->nfs_server.addrlen,
829 .rpc_ops = &nfs_v2_clientops,
830 .proto = data->nfs_server.protocol,
832 struct rpc_timeout timeparms;
833 struct nfs_client *clp;
836 dprintk("--> nfs_init_server()\n");
839 if (data->version == 3)
840 cl_init.rpc_ops = &nfs_v3_clientops;
843 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
844 data->timeo, data->retrans);
846 /* Allocate or find a client reference we can use */
847 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX,
848 data->flags & NFS_MOUNT_NORESVPORT);
850 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
854 server->nfs_client = clp;
856 /* Initialise the client representation from the mount data */
857 server->flags = data->flags;
858 server->options = data->options;
859 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
860 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
861 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
864 server->rsize = nfs_block_size(data->rsize, NULL);
866 server->wsize = nfs_block_size(data->wsize, NULL);
868 server->acregmin = data->acregmin * HZ;
869 server->acregmax = data->acregmax * HZ;
870 server->acdirmin = data->acdirmin * HZ;
871 server->acdirmax = data->acdirmax * HZ;
873 /* Start lockd here, before we might error out */
874 error = nfs_start_lockd(server);
878 server->port = data->nfs_server.port;
880 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
884 /* Preserve the values of mount_server-related mount options */
885 if (data->mount_server.addrlen) {
886 memcpy(&server->mountd_address, &data->mount_server.address,
887 data->mount_server.addrlen);
888 server->mountd_addrlen = data->mount_server.addrlen;
890 server->mountd_version = data->mount_server.version;
891 server->mountd_port = data->mount_server.port;
892 server->mountd_protocol = data->mount_server.protocol;
894 server->namelen = data->namlen;
895 /* Create a client RPC handle for the NFSv3 ACL management interface */
896 nfs_init_server_aclclient(server);
897 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
901 server->nfs_client = NULL;
903 dprintk("<-- nfs_init_server() = xerror %d\n", error);
908 * Load up the server record from information gained in an fsinfo record
910 static void nfs_server_set_fsinfo(struct nfs_server *server, 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 set_pnfs_layoutdriver(server, fsinfo->layouttype);
942 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
944 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
945 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
946 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
947 if (server->dtsize > server->rsize)
948 server->dtsize = server->rsize;
950 if (server->flags & NFS_MOUNT_NOAC) {
951 server->acregmin = server->acregmax = 0;
952 server->acdirmin = server->acdirmax = 0;
955 server->maxfilesize = fsinfo->maxfilesize;
957 server->time_delta = fsinfo->time_delta;
959 /* We're airborne Set socket buffersize */
960 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
964 * Probe filesystem information, including the FSID on v2/v3
966 static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
968 struct nfs_fsinfo fsinfo;
969 struct nfs_client *clp = server->nfs_client;
972 dprintk("--> nfs_probe_fsinfo()\n");
974 if (clp->rpc_ops->set_capabilities != NULL) {
975 error = clp->rpc_ops->set_capabilities(server, mntfh);
980 fsinfo.fattr = fattr;
981 fsinfo.layouttype = 0;
982 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
986 nfs_server_set_fsinfo(server, &fsinfo);
988 /* Get some general file system info */
989 if (server->namelen == 0) {
990 struct nfs_pathconf pathinfo;
992 pathinfo.fattr = fattr;
993 nfs_fattr_init(fattr);
995 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
996 server->namelen = pathinfo.max_namelen;
999 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1003 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1008 * Copy useful information when duplicating a server record
1010 static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1012 target->flags = source->flags;
1013 target->rsize = source->rsize;
1014 target->wsize = source->wsize;
1015 target->acregmin = source->acregmin;
1016 target->acregmax = source->acregmax;
1017 target->acdirmin = source->acdirmin;
1018 target->acdirmax = source->acdirmax;
1019 target->caps = source->caps;
1020 target->options = source->options;
1023 static void nfs_server_insert_lists(struct nfs_server *server)
1025 struct nfs_client *clp = server->nfs_client;
1027 spin_lock(&nfs_client_lock);
1028 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
1029 list_add_tail(&server->master_link, &nfs_volume_list);
1030 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1031 spin_unlock(&nfs_client_lock);
1035 static void nfs_server_remove_lists(struct nfs_server *server)
1037 struct nfs_client *clp = server->nfs_client;
1039 spin_lock(&nfs_client_lock);
1040 list_del_rcu(&server->client_link);
1041 if (clp && list_empty(&clp->cl_superblocks))
1042 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
1043 list_del(&server->master_link);
1044 spin_unlock(&nfs_client_lock);
1050 * Allocate and initialise a server record
1052 static struct nfs_server *nfs_alloc_server(void)
1054 struct nfs_server *server;
1056 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1060 server->client = server->client_acl = ERR_PTR(-EINVAL);
1062 /* Zero out the NFS state stuff */
1063 INIT_LIST_HEAD(&server->client_link);
1064 INIT_LIST_HEAD(&server->master_link);
1065 INIT_LIST_HEAD(&server->delegations);
1067 atomic_set(&server->active, 0);
1069 server->io_stats = nfs_alloc_iostats();
1070 if (!server->io_stats) {
1075 if (bdi_init(&server->backing_dev_info)) {
1076 nfs_free_iostats(server->io_stats);
1081 pnfs_init_server(server);
1087 * Free up a server record
1089 void nfs_free_server(struct nfs_server *server)
1091 dprintk("--> nfs_free_server()\n");
1093 nfs_server_remove_lists(server);
1094 unset_pnfs_layoutdriver(server);
1096 if (server->destroy != NULL)
1097 server->destroy(server);
1099 if (!IS_ERR(server->client_acl))
1100 rpc_shutdown_client(server->client_acl);
1101 if (!IS_ERR(server->client))
1102 rpc_shutdown_client(server->client);
1104 nfs_put_client(server->nfs_client);
1106 nfs_free_iostats(server->io_stats);
1107 bdi_destroy(&server->backing_dev_info);
1109 nfs_release_automount_timer();
1110 dprintk("<-- nfs_free_server()\n");
1114 * Create a version 2 or 3 volume record
1115 * - keyed on server and FSID
1117 struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
1118 struct nfs_fh *mntfh)
1120 struct nfs_server *server;
1121 struct nfs_fattr *fattr;
1124 server = nfs_alloc_server();
1126 return ERR_PTR(-ENOMEM);
1129 fattr = nfs_alloc_fattr();
1133 /* Get a client representation */
1134 error = nfs_init_server(server, data);
1138 BUG_ON(!server->nfs_client);
1139 BUG_ON(!server->nfs_client->rpc_ops);
1140 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1142 /* Probe the root fh to retrieve its FSID */
1143 error = nfs_probe_fsinfo(server, mntfh, fattr);
1146 if (server->nfs_client->rpc_ops->version == 3) {
1147 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1148 server->namelen = NFS3_MAXNAMLEN;
1149 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1150 server->caps |= NFS_CAP_READDIRPLUS;
1152 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1153 server->namelen = NFS2_MAXNAMLEN;
1156 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1157 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
1159 dprintk("nfs_create_server: getattr error = %d\n", -error);
1163 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
1165 dprintk("Server FSID: %llx:%llx\n",
1166 (unsigned long long) server->fsid.major,
1167 (unsigned long long) server->fsid.minor);
1169 nfs_server_insert_lists(server);
1170 server->mount_time = jiffies;
1171 nfs_free_fattr(fattr);
1175 nfs_free_fattr(fattr);
1176 nfs_free_server(server);
1177 return ERR_PTR(error);
1180 #ifdef CONFIG_NFS_V4
1182 * NFSv4.0 callback thread helper
1184 * Find a client by IP address, protocol version, and minorversion
1186 * Called from the pg_authenticate method. The callback identifier
1187 * is not used as it has not been decoded.
1189 * Returns NULL if no such client
1192 nfs4_find_client_no_ident(const struct sockaddr *addr)
1194 struct nfs_client *clp;
1196 spin_lock(&nfs_client_lock);
1197 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
1198 if (nfs4_cb_match_client(addr, clp, 0) == false)
1200 atomic_inc(&clp->cl_count);
1201 spin_unlock(&nfs_client_lock);
1204 spin_unlock(&nfs_client_lock);
1209 * NFSv4.0 callback thread helper
1211 * Find a client by callback identifier
1214 nfs4_find_client_ident(int cb_ident)
1216 struct nfs_client *clp;
1218 spin_lock(&nfs_client_lock);
1219 clp = idr_find(&cb_ident_idr, cb_ident);
1221 atomic_inc(&clp->cl_count);
1222 spin_unlock(&nfs_client_lock);
1226 #if defined(CONFIG_NFS_V4_1)
1228 * NFSv4.1 callback thread helper
1229 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1230 * minorversion, and sessionID
1232 * Returns NULL if no such client
1235 nfs4_find_client_sessionid(const struct sockaddr *addr,
1236 struct nfs4_sessionid *sid)
1238 struct nfs_client *clp;
1240 spin_lock(&nfs_client_lock);
1241 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
1242 if (nfs4_cb_match_client(addr, clp, 1) == false)
1245 if (!nfs4_has_session(clp))
1248 /* Match sessionid*/
1249 if (memcmp(clp->cl_session->sess_id.data,
1250 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
1253 atomic_inc(&clp->cl_count);
1254 spin_unlock(&nfs_client_lock);
1257 spin_unlock(&nfs_client_lock);
1261 #else /* CONFIG_NFS_V4_1 */
1264 nfs4_find_client_sessionid(const struct sockaddr *addr,
1265 struct nfs4_sessionid *sid)
1269 #endif /* CONFIG_NFS_V4_1 */
1272 * Initialize the NFS4 callback service
1274 static int nfs4_init_callback(struct nfs_client *clp)
1278 if (clp->rpc_ops->version == 4) {
1279 if (nfs4_has_session(clp)) {
1280 error = xprt_setup_backchannel(
1281 clp->cl_rpcclient->cl_xprt,
1282 NFS41_BC_MIN_CALLBACKS);
1287 error = nfs_callback_up(clp->cl_mvops->minor_version,
1288 clp->cl_rpcclient->cl_xprt);
1290 dprintk("%s: failed to start callback. Error = %d\n",
1294 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1300 * Initialize the minor version specific parts of an NFS4 client record
1302 static int nfs4_init_client_minor_version(struct nfs_client *clp)
1304 #if defined(CONFIG_NFS_V4_1)
1305 if (clp->cl_mvops->minor_version) {
1306 struct nfs4_session *session = NULL;
1308 * Create the session and mark it expired.
1309 * When a SEQUENCE operation encounters the expired session
1310 * it will do session recovery to initialize it.
1312 session = nfs4_alloc_session(clp);
1316 clp->cl_session = session;
1318 * The create session reply races with the server back
1319 * channel probe. Mark the client NFS_CS_SESSION_INITING
1320 * so that the client back channel can find the
1323 clp->cl_cons_state = NFS_CS_SESSION_INITING;
1325 #endif /* CONFIG_NFS_V4_1 */
1327 return nfs4_init_callback(clp);
1331 * Initialise an NFS4 client record
1333 int nfs4_init_client(struct nfs_client *clp,
1334 const struct rpc_timeout *timeparms,
1335 const char *ip_addr,
1336 rpc_authflavor_t authflavour,
1341 if (clp->cl_cons_state == NFS_CS_READY) {
1342 /* the client is initialised already */
1343 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1347 /* Check NFS protocol revision and initialize RPC op vector */
1348 clp->rpc_ops = &nfs_v4_clientops;
1350 error = nfs_create_rpc_client(clp, timeparms, authflavour,
1354 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
1356 error = nfs_idmap_new(clp);
1358 dprintk("%s: failed to create idmapper. Error = %d\n",
1362 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
1364 error = nfs4_init_client_minor_version(clp);
1368 if (!nfs4_has_session(clp))
1369 nfs_mark_client_ready(clp, NFS_CS_READY);
1373 nfs_mark_client_ready(clp, error);
1374 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1379 * Set up an NFS4 client
1381 static int nfs4_set_client(struct nfs_server *server,
1382 const char *hostname,
1383 const struct sockaddr *addr,
1384 const size_t addrlen,
1385 const char *ip_addr,
1386 rpc_authflavor_t authflavour,
1387 int proto, const struct rpc_timeout *timeparms,
1390 struct nfs_client_initdata cl_init = {
1391 .hostname = hostname,
1394 .rpc_ops = &nfs_v4_clientops,
1396 .minorversion = minorversion,
1398 struct nfs_client *clp;
1401 dprintk("--> nfs4_set_client()\n");
1403 /* Allocate or find a client reference we can use */
1404 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour,
1405 server->flags & NFS_MOUNT_NORESVPORT);
1407 error = PTR_ERR(clp);
1412 * Query for the lease time on clientid setup or renewal
1414 * Note that this will be set on nfs_clients that were created
1415 * only for the DS role and did not set this bit, but now will
1416 * serve a dual role.
1418 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1420 server->nfs_client = clp;
1421 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1424 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1429 * Set up a pNFS Data Server client.
1431 * Return any existing nfs_client that matches server address,port,version
1434 * For a new nfs_client, use a soft mount (default), a low retrans and a
1435 * low timeout interval so that if a connection is lost, we retry through
1438 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1439 const struct sockaddr *ds_addr,
1440 int ds_addrlen, int ds_proto)
1442 struct nfs_client_initdata cl_init = {
1444 .addrlen = ds_addrlen,
1445 .rpc_ops = &nfs_v4_clientops,
1447 .minorversion = mds_clp->cl_minorversion,
1449 struct rpc_timeout ds_timeout = {
1450 .to_initval = 15 * HZ,
1451 .to_maxval = 15 * HZ,
1453 .to_exponential = 1,
1455 struct nfs_client *clp;
1458 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1459 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1460 * (section 13.1 RFC 5661).
1462 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1463 mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
1465 dprintk("<-- %s %p\n", __func__, clp);
1468 EXPORT_SYMBOL(nfs4_set_ds_client);
1471 * Session has been established, and the client marked ready.
1472 * Set the mount rsize and wsize with negotiated fore channel
1473 * attributes which will be bound checked in nfs_server_set_fsinfo.
1475 static void nfs4_session_set_rwsize(struct nfs_server *server)
1477 #ifdef CONFIG_NFS_V4_1
1478 struct nfs4_session *sess;
1482 if (!nfs4_has_session(server->nfs_client))
1484 sess = server->nfs_client->cl_session;
1485 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1486 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1488 if (server->rsize > server_resp_sz)
1489 server->rsize = server_resp_sz;
1490 if (server->wsize > server_rqst_sz)
1491 server->wsize = server_rqst_sz;
1492 #endif /* CONFIG_NFS_V4_1 */
1495 static int nfs4_server_common_setup(struct nfs_server *server,
1496 struct nfs_fh *mntfh)
1498 struct nfs_fattr *fattr;
1501 BUG_ON(!server->nfs_client);
1502 BUG_ON(!server->nfs_client->rpc_ops);
1503 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1505 /* data servers support only a subset of NFSv4.1 */
1506 if (is_ds_only_client(server->nfs_client))
1507 return -EPROTONOSUPPORT;
1509 fattr = nfs_alloc_fattr();
1513 /* We must ensure the session is initialised first */
1514 error = nfs4_init_session(server);
1518 /* Probe the root fh to retrieve its FSID and filehandle */
1519 error = nfs4_get_rootfh(server, mntfh);
1523 dprintk("Server FSID: %llx:%llx\n",
1524 (unsigned long long) server->fsid.major,
1525 (unsigned long long) server->fsid.minor);
1526 dprintk("Mount FH: %d\n", mntfh->size);
1528 nfs4_session_set_rwsize(server);
1530 error = nfs_probe_fsinfo(server, mntfh, fattr);
1534 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1535 server->namelen = NFS4_MAXNAMLEN;
1537 nfs_server_insert_lists(server);
1538 server->mount_time = jiffies;
1540 nfs_free_fattr(fattr);
1545 * Create a version 4 volume record
1547 static int nfs4_init_server(struct nfs_server *server,
1548 const struct nfs_parsed_mount_data *data)
1550 struct rpc_timeout timeparms;
1553 dprintk("--> nfs4_init_server()\n");
1555 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1556 data->timeo, data->retrans);
1558 /* Initialise the client representation from the mount data */
1559 server->flags = data->flags;
1560 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1561 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1562 server->caps |= NFS_CAP_READDIRPLUS;
1563 server->options = data->options;
1565 /* Get a client record */
1566 error = nfs4_set_client(server,
1567 data->nfs_server.hostname,
1568 (const struct sockaddr *)&data->nfs_server.address,
1569 data->nfs_server.addrlen,
1570 data->client_address,
1571 data->auth_flavors[0],
1572 data->nfs_server.protocol,
1574 data->minorversion);
1579 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1582 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1583 server->caps |= NFS_CAP_UIDGID_NOMAP;
1586 server->rsize = nfs_block_size(data->rsize, NULL);
1588 server->wsize = nfs_block_size(data->wsize, NULL);
1590 server->acregmin = data->acregmin * HZ;
1591 server->acregmax = data->acregmax * HZ;
1592 server->acdirmin = data->acdirmin * HZ;
1593 server->acdirmax = data->acdirmax * HZ;
1595 server->port = data->nfs_server.port;
1597 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
1601 dprintk("<-- nfs4_init_server() = %d\n", error);
1606 * Create a version 4 volume record
1607 * - keyed on server and FSID
1609 struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1610 struct nfs_fh *mntfh)
1612 struct nfs_server *server;
1615 dprintk("--> nfs4_create_server()\n");
1617 server = nfs_alloc_server();
1619 return ERR_PTR(-ENOMEM);
1621 /* set up the general RPC client */
1622 error = nfs4_init_server(server, data);
1626 error = nfs4_server_common_setup(server, mntfh);
1630 dprintk("<-- nfs4_create_server() = %p\n", server);
1634 nfs_free_server(server);
1635 dprintk("<-- nfs4_create_server() = error %d\n", error);
1636 return ERR_PTR(error);
1640 * Create an NFS4 referral server record
1642 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1643 struct nfs_fh *mntfh)
1645 struct nfs_client *parent_client;
1646 struct nfs_server *server, *parent_server;
1649 dprintk("--> nfs4_create_referral_server()\n");
1651 server = nfs_alloc_server();
1653 return ERR_PTR(-ENOMEM);
1655 parent_server = NFS_SB(data->sb);
1656 parent_client = parent_server->nfs_client;
1658 /* Initialise the client representation from the parent server */
1659 nfs_server_copy_userdata(server, parent_server);
1660 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
1662 /* Get a client representation.
1663 * Note: NFSv4 always uses TCP, */
1664 error = nfs4_set_client(server, data->hostname,
1667 parent_client->cl_ipaddr,
1669 parent_server->client->cl_xprt->prot,
1670 parent_server->client->cl_timeout,
1671 parent_client->cl_mvops->minor_version);
1675 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1679 error = nfs4_server_common_setup(server, mntfh);
1683 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1687 nfs_free_server(server);
1688 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1689 return ERR_PTR(error);
1692 #endif /* CONFIG_NFS_V4 */
1695 * Clone an NFS2, NFS3 or NFS4 server record
1697 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1699 struct nfs_fattr *fattr)
1701 struct nfs_server *server;
1702 struct nfs_fattr *fattr_fsinfo;
1705 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
1706 (unsigned long long) fattr->fsid.major,
1707 (unsigned long long) fattr->fsid.minor);
1709 server = nfs_alloc_server();
1711 return ERR_PTR(-ENOMEM);
1714 fattr_fsinfo = nfs_alloc_fattr();
1715 if (fattr_fsinfo == NULL)
1716 goto out_free_server;
1718 /* Copy data from the source */
1719 server->nfs_client = source->nfs_client;
1720 atomic_inc(&server->nfs_client->cl_count);
1721 nfs_server_copy_userdata(server, source);
1723 server->fsid = fattr->fsid;
1725 error = nfs_init_server_rpcclient(server,
1726 source->client->cl_timeout,
1727 source->client->cl_auth->au_flavor);
1729 goto out_free_server;
1730 if (!IS_ERR(source->client_acl))
1731 nfs_init_server_aclclient(server);
1733 /* probe the filesystem info for this server filesystem */
1734 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1736 goto out_free_server;
1738 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1739 server->namelen = NFS4_MAXNAMLEN;
1741 dprintk("Cloned FSID: %llx:%llx\n",
1742 (unsigned long long) server->fsid.major,
1743 (unsigned long long) server->fsid.minor);
1745 error = nfs_start_lockd(server);
1747 goto out_free_server;
1749 nfs_server_insert_lists(server);
1750 server->mount_time = jiffies;
1752 nfs_free_fattr(fattr_fsinfo);
1753 dprintk("<-- nfs_clone_server() = %p\n", server);
1757 nfs_free_fattr(fattr_fsinfo);
1758 nfs_free_server(server);
1759 dprintk("<-- nfs_clone_server() = error %d\n", error);
1760 return ERR_PTR(error);
1763 #ifdef CONFIG_PROC_FS
1764 static struct proc_dir_entry *proc_fs_nfs;
1766 static int nfs_server_list_open(struct inode *inode, struct file *file);
1767 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1768 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1769 static void nfs_server_list_stop(struct seq_file *p, void *v);
1770 static int nfs_server_list_show(struct seq_file *m, void *v);
1772 static const struct seq_operations nfs_server_list_ops = {
1773 .start = nfs_server_list_start,
1774 .next = nfs_server_list_next,
1775 .stop = nfs_server_list_stop,
1776 .show = nfs_server_list_show,
1779 static const struct file_operations nfs_server_list_fops = {
1780 .open = nfs_server_list_open,
1782 .llseek = seq_lseek,
1783 .release = seq_release,
1784 .owner = THIS_MODULE,
1787 static int nfs_volume_list_open(struct inode *inode, struct file *file);
1788 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1789 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1790 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1791 static int nfs_volume_list_show(struct seq_file *m, void *v);
1793 static const struct seq_operations nfs_volume_list_ops = {
1794 .start = nfs_volume_list_start,
1795 .next = nfs_volume_list_next,
1796 .stop = nfs_volume_list_stop,
1797 .show = nfs_volume_list_show,
1800 static const struct file_operations nfs_volume_list_fops = {
1801 .open = nfs_volume_list_open,
1803 .llseek = seq_lseek,
1804 .release = seq_release,
1805 .owner = THIS_MODULE,
1809 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1812 static int nfs_server_list_open(struct inode *inode, struct file *file)
1817 ret = seq_open(file, &nfs_server_list_ops);
1821 m = file->private_data;
1822 m->private = PDE(inode)->data;
1828 * set up the iterator to start reading from the server list and return the first item
1830 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1832 /* lock the list against modification */
1833 spin_lock(&nfs_client_lock);
1834 return seq_list_start_head(&nfs_client_list, *_pos);
1838 * move to next server
1840 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1842 return seq_list_next(v, &nfs_client_list, pos);
1846 * clean up after reading from the transports list
1848 static void nfs_server_list_stop(struct seq_file *p, void *v)
1850 spin_unlock(&nfs_client_lock);
1854 * display a header line followed by a load of call lines
1856 static int nfs_server_list_show(struct seq_file *m, void *v)
1858 struct nfs_client *clp;
1860 /* display header on line 1 */
1861 if (v == &nfs_client_list) {
1862 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1866 /* display one transport per line on subsequent lines */
1867 clp = list_entry(v, struct nfs_client, cl_share_link);
1869 seq_printf(m, "v%u %s %s %3d %s\n",
1870 clp->rpc_ops->version,
1871 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1872 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1873 atomic_read(&clp->cl_count),
1880 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1882 static int nfs_volume_list_open(struct inode *inode, struct file *file)
1887 ret = seq_open(file, &nfs_volume_list_ops);
1891 m = file->private_data;
1892 m->private = PDE(inode)->data;
1898 * set up the iterator to start reading from the volume list and return the first item
1900 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1902 /* lock the list against modification */
1903 spin_lock(&nfs_client_lock);
1904 return seq_list_start_head(&nfs_volume_list, *_pos);
1908 * move to next volume
1910 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1912 return seq_list_next(v, &nfs_volume_list, pos);
1916 * clean up after reading from the transports list
1918 static void nfs_volume_list_stop(struct seq_file *p, void *v)
1920 spin_unlock(&nfs_client_lock);
1924 * display a header line followed by a load of call lines
1926 static int nfs_volume_list_show(struct seq_file *m, void *v)
1928 struct nfs_server *server;
1929 struct nfs_client *clp;
1930 char dev[8], fsid[17];
1932 /* display header on line 1 */
1933 if (v == &nfs_volume_list) {
1934 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
1937 /* display one transport per line on subsequent lines */
1938 server = list_entry(v, struct nfs_server, master_link);
1939 clp = server->nfs_client;
1941 snprintf(dev, 8, "%u:%u",
1942 MAJOR(server->s_dev), MINOR(server->s_dev));
1944 snprintf(fsid, 17, "%llx:%llx",
1945 (unsigned long long) server->fsid.major,
1946 (unsigned long long) server->fsid.minor);
1948 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
1949 clp->rpc_ops->version,
1950 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1951 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1954 nfs_server_fscache_state(server));
1960 * initialise the /proc/fs/nfsfs/ directory
1962 int __init nfs_fs_proc_init(void)
1964 struct proc_dir_entry *p;
1966 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
1970 /* a file of servers with which we're dealing */
1971 p = proc_create("servers", S_IFREG|S_IRUGO,
1972 proc_fs_nfs, &nfs_server_list_fops);
1976 /* a file of volumes that we have mounted */
1977 p = proc_create("volumes", S_IFREG|S_IRUGO,
1978 proc_fs_nfs, &nfs_volume_list_fops);
1984 remove_proc_entry("servers", proc_fs_nfs);
1986 remove_proc_entry("fs/nfsfs", NULL);
1992 * clean up the /proc/fs/nfsfs/ directory
1994 void nfs_fs_proc_exit(void)
1996 remove_proc_entry("volumes", proc_fs_nfs);
1997 remove_proc_entry("servers", proc_fs_nfs);
1998 remove_proc_entry("fs/nfsfs", NULL);
2001 #endif /* CONFIG_PROC_FS */
2003 module_param(nfs4_disable_idmapping, bool, 0644);
2004 MODULE_PARM_DESC(nfs4_disable_idmapping,
2005 "Turn off NFSv4 idmapping when using 'sec=sys'");