2 * In-kernel rpcbind client supporting versions 2, 3, and 4 of the rpcbind
5 * Based on RFC 1833: "Binding Protocols for ONC RPC Version 2" and
6 * RFC 3530: "Network File System (NFS) version 4 Protocol"
8 * Original: Gilles Quillard, Bull Open Source, 2005 <gilles.quillard@bull.net>
9 * Updated: Chuck Lever, Oracle Corporation, 2007 <chuck.lever@oracle.com>
11 * Descended from net/sunrpc/pmap_clnt.c,
12 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
15 #include <linux/module.h>
17 #include <linux/types.h>
18 #include <linux/socket.h>
21 #include <linux/in6.h>
22 #include <linux/kernel.h>
23 #include <linux/errno.h>
24 #include <linux/mutex.h>
25 #include <linux/slab.h>
26 #include <linux/nsproxy.h>
29 #include <linux/sunrpc/clnt.h>
30 #include <linux/sunrpc/sched.h>
31 #include <linux/sunrpc/xprtsock.h>
36 # define RPCDBG_FACILITY RPCDBG_BIND
39 #define RPCBIND_SOCK_PATHNAME "/var/run/rpcbind.sock"
41 #define RPCBIND_PROGRAM (100000u)
42 #define RPCBIND_PORT (111u)
44 #define RPCBVERS_2 (2u)
45 #define RPCBVERS_3 (3u)
46 #define RPCBVERS_4 (4u)
53 RPCBPROC_GETADDR = 3, /* alias for GETPORT */
56 RPCBPROC_BCAST = 5, /* alias for CALLIT */
69 * The "owner" is allowed to unset a service in the rpcbind database.
71 * For AF_LOCAL SET/UNSET requests, rpcbind treats this string as a
72 * UID which it maps to a local user name via a password lookup.
73 * In all other cases it is ignored.
75 * For SET/UNSET requests, user space provides a value, even for
76 * network requests, and GETADDR uses an empty string. We follow
77 * those precedents here.
79 #define RPCB_OWNER_STRING "0"
80 #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
85 #define RPCB_program_sz (1)
86 #define RPCB_version_sz (1)
87 #define RPCB_protocol_sz (1)
88 #define RPCB_port_sz (1)
89 #define RPCB_boolean_sz (1)
91 #define RPCB_netid_sz (1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
92 #define RPCB_addr_sz (1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
93 #define RPCB_ownerstring_sz (1 + XDR_QUADLEN(RPCB_MAXOWNERLEN))
96 * XDR argument and result sizes
98 #define RPCB_mappingargs_sz (RPCB_program_sz + RPCB_version_sz + \
99 RPCB_protocol_sz + RPCB_port_sz)
100 #define RPCB_getaddrargs_sz (RPCB_program_sz + RPCB_version_sz + \
101 RPCB_netid_sz + RPCB_addr_sz + \
104 #define RPCB_getportres_sz RPCB_port_sz
105 #define RPCB_setres_sz RPCB_boolean_sz
108 * Note that RFC 1833 does not put any size restrictions on the
109 * address string returned by the remote rpcbind database.
111 #define RPCB_getaddrres_sz RPCB_addr_sz
113 static void rpcb_getport_done(struct rpc_task *, void *);
114 static void rpcb_map_release(void *data);
115 static const struct rpc_program rpcb_program;
117 struct rpcbind_args {
118 struct rpc_xprt * r_xprt;
123 unsigned short r_port;
124 const char * r_netid;
126 const char * r_owner;
131 static struct rpc_procinfo rpcb_procedures2[];
132 static struct rpc_procinfo rpcb_procedures3[];
133 static struct rpc_procinfo rpcb_procedures4[];
137 struct rpc_procinfo * rpc_proc;
140 static const struct rpcb_info rpcb_next_version[];
141 static const struct rpcb_info rpcb_next_version6[];
143 static const struct rpc_call_ops rpcb_getport_ops = {
144 .rpc_call_done = rpcb_getport_done,
145 .rpc_release = rpcb_map_release,
148 static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
150 xprt_clear_binding(xprt);
151 rpc_wake_up_status(&xprt->binding, status);
154 static void rpcb_map_release(void *data)
156 struct rpcbind_args *map = data;
158 rpcb_wake_rpcbind_waiters(map->r_xprt, map->r_status);
159 xprt_put(map->r_xprt);
164 static int rpcb_get_local(struct net *net)
167 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
169 spin_lock(&sn->rpcb_clnt_lock);
172 cnt = sn->rpcb_users;
173 spin_unlock(&sn->rpcb_clnt_lock);
178 void rpcb_put_local(struct net *net)
180 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
181 struct rpc_clnt *clnt = sn->rpcb_local_clnt;
182 struct rpc_clnt *clnt4 = sn->rpcb_local_clnt4;
185 spin_lock(&sn->rpcb_clnt_lock);
186 if (--sn->rpcb_users == 0) {
187 sn->rpcb_local_clnt = NULL;
188 sn->rpcb_local_clnt4 = NULL;
190 shutdown = !sn->rpcb_users;
191 spin_unlock(&sn->rpcb_clnt_lock);
195 * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister
198 rpc_shutdown_client(clnt4);
200 rpc_shutdown_client(clnt);
204 static void rpcb_set_local(struct net *net, struct rpc_clnt *clnt,
205 struct rpc_clnt *clnt4)
207 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
209 /* Protected by rpcb_create_local_mutex */
210 sn->rpcb_local_clnt = clnt;
211 sn->rpcb_local_clnt4 = clnt4;
214 dprintk("RPC: created new rpcb local clients (rpcb_local_clnt: "
215 "%p, rpcb_local_clnt4: %p) for net %p%s\n",
216 sn->rpcb_local_clnt, sn->rpcb_local_clnt4,
217 net, (net == &init_net) ? " (init_net)" : "");
221 * Returns zero on success, otherwise a negative errno value
224 static int rpcb_create_local_unix(struct net *net)
226 static const struct sockaddr_un rpcb_localaddr_rpcbind = {
227 .sun_family = AF_LOCAL,
228 .sun_path = RPCBIND_SOCK_PATHNAME,
230 struct rpc_create_args args = {
232 .protocol = XPRT_TRANSPORT_LOCAL,
233 .address = (struct sockaddr *)&rpcb_localaddr_rpcbind,
234 .addrsize = sizeof(rpcb_localaddr_rpcbind),
235 .servername = "localhost",
236 .program = &rpcb_program,
237 .version = RPCBVERS_2,
238 .authflavor = RPC_AUTH_NULL,
240 struct rpc_clnt *clnt, *clnt4;
244 * Because we requested an RPC PING at transport creation time,
245 * this works only if the user space portmapper is rpcbind, and
246 * it's listening on AF_LOCAL on the named socket.
248 clnt = rpc_create(&args);
250 dprintk("RPC: failed to create AF_LOCAL rpcbind "
251 "client (errno %ld).\n", PTR_ERR(clnt));
252 result = -PTR_ERR(clnt);
256 clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
258 dprintk("RPC: failed to bind second program to "
259 "rpcbind v4 client (errno %ld).\n",
264 rpcb_set_local(net, clnt, clnt4);
271 * Returns zero on success, otherwise a negative errno value
274 static int rpcb_create_local_net(struct net *net)
276 static const struct sockaddr_in rpcb_inaddr_loopback = {
277 .sin_family = AF_INET,
278 .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
279 .sin_port = htons(RPCBIND_PORT),
281 struct rpc_create_args args = {
283 .protocol = XPRT_TRANSPORT_TCP,
284 .address = (struct sockaddr *)&rpcb_inaddr_loopback,
285 .addrsize = sizeof(rpcb_inaddr_loopback),
286 .servername = "localhost",
287 .program = &rpcb_program,
288 .version = RPCBVERS_2,
289 .authflavor = RPC_AUTH_UNIX,
290 .flags = RPC_CLNT_CREATE_NOPING,
292 struct rpc_clnt *clnt, *clnt4;
295 clnt = rpc_create(&args);
297 dprintk("RPC: failed to create local rpcbind "
298 "client (errno %ld).\n", PTR_ERR(clnt));
299 result = -PTR_ERR(clnt);
304 * This results in an RPC ping. On systems running portmapper,
305 * the v4 ping will fail. Proceed anyway, but disallow rpcb
308 clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
310 dprintk("RPC: failed to bind second program to "
311 "rpcbind v4 client (errno %ld).\n",
316 rpcb_set_local(net, clnt, clnt4);
323 * Returns zero on success, otherwise a negative errno value
326 int rpcb_create_local(struct net *net)
328 static DEFINE_MUTEX(rpcb_create_local_mutex);
331 if (rpcb_get_local(net))
334 mutex_lock(&rpcb_create_local_mutex);
335 if (rpcb_get_local(net))
338 if (rpcb_create_local_unix(net) != 0)
339 result = rpcb_create_local_net(net);
342 mutex_unlock(&rpcb_create_local_mutex);
346 static struct rpc_clnt *rpcb_create(struct net *net, const char *hostname,
347 struct sockaddr *srvaddr, size_t salen,
348 int proto, u32 version)
350 struct rpc_create_args args = {
355 .servername = hostname,
356 .program = &rpcb_program,
358 .authflavor = RPC_AUTH_UNIX,
359 .flags = (RPC_CLNT_CREATE_NOPING |
360 RPC_CLNT_CREATE_NONPRIVPORT),
363 switch (srvaddr->sa_family) {
365 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
368 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
371 return ERR_PTR(-EAFNOSUPPORT);
374 return rpc_create(&args);
377 static int rpcb_register_call(struct rpc_clnt *clnt, struct rpc_message *msg)
379 int result, error = 0;
381 msg->rpc_resp = &result;
383 error = rpc_call_sync(clnt, msg, RPC_TASK_SOFTCONN);
385 dprintk("RPC: failed to contact local rpcbind "
386 "server (errno %d).\n", -error);
396 * rpcb_register - set or unset a port registration with the local rpcbind svc
397 * @net: target network namespace
398 * @prog: RPC program number to bind
399 * @vers: RPC version number to bind
400 * @prot: transport protocol to register
401 * @port: port value to register
403 * Returns zero if the registration request was dispatched successfully
404 * and the rpcbind daemon returned success. Otherwise, returns an errno
405 * value that reflects the nature of the error (request could not be
406 * dispatched, timed out, or rpcbind returned an error).
408 * RPC services invoke this function to advertise their contact
409 * information via the system's rpcbind daemon. RPC services
410 * invoke this function once for each [program, version, transport]
411 * tuple they wish to advertise.
413 * Callers may also unregister RPC services that are no longer
414 * available by setting the passed-in port to zero. This removes
415 * all registered transports for [program, version] from the local
418 * This function uses rpcbind protocol version 2 to contact the
419 * local rpcbind daemon.
421 * Registration works over both AF_INET and AF_INET6, and services
422 * registered via this function are advertised as available for any
423 * address. If the local rpcbind daemon is listening on AF_INET6,
424 * services registered via this function will be advertised on
425 * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6
428 int rpcb_register(struct net *net, u32 prog, u32 vers, int prot, unsigned short port)
430 struct rpcbind_args map = {
436 struct rpc_message msg = {
439 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
441 dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
442 "rpcbind\n", (port ? "" : "un"),
443 prog, vers, prot, port);
445 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET];
447 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET];
449 return rpcb_register_call(sn->rpcb_local_clnt, &msg);
453 * Fill in AF_INET family-specific arguments to register
455 static int rpcb_register_inet4(struct sunrpc_net *sn,
456 const struct sockaddr *sap,
457 struct rpc_message *msg)
459 const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
460 struct rpcbind_args *map = msg->rpc_argp;
461 unsigned short port = ntohs(sin->sin_port);
464 map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL);
466 dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
467 "local rpcbind\n", (port ? "" : "un"),
468 map->r_prog, map->r_vers,
469 map->r_addr, map->r_netid);
471 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
473 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
475 result = rpcb_register_call(sn->rpcb_local_clnt4, msg);
481 * Fill in AF_INET6 family-specific arguments to register
483 static int rpcb_register_inet6(struct sunrpc_net *sn,
484 const struct sockaddr *sap,
485 struct rpc_message *msg)
487 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap;
488 struct rpcbind_args *map = msg->rpc_argp;
489 unsigned short port = ntohs(sin6->sin6_port);
492 map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL);
494 dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
495 "local rpcbind\n", (port ? "" : "un"),
496 map->r_prog, map->r_vers,
497 map->r_addr, map->r_netid);
499 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
501 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
503 result = rpcb_register_call(sn->rpcb_local_clnt4, msg);
508 static int rpcb_unregister_all_protofamilies(struct sunrpc_net *sn,
509 struct rpc_message *msg)
511 struct rpcbind_args *map = msg->rpc_argp;
513 dprintk("RPC: unregistering [%u, %u, '%s'] with "
515 map->r_prog, map->r_vers, map->r_netid);
518 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
520 return rpcb_register_call(sn->rpcb_local_clnt4, msg);
524 * rpcb_v4_register - set or unset a port registration with the local rpcbind
525 * @net: target network namespace
526 * @program: RPC program number of service to (un)register
527 * @version: RPC version number of service to (un)register
528 * @address: address family, IP address, and port to (un)register
529 * @netid: netid of transport protocol to (un)register
531 * Returns zero if the registration request was dispatched successfully
532 * and the rpcbind daemon returned success. Otherwise, returns an errno
533 * value that reflects the nature of the error (request could not be
534 * dispatched, timed out, or rpcbind returned an error).
536 * RPC services invoke this function to advertise their contact
537 * information via the system's rpcbind daemon. RPC services
538 * invoke this function once for each [program, version, address,
539 * netid] tuple they wish to advertise.
541 * Callers may also unregister RPC services that are registered at a
542 * specific address by setting the port number in @address to zero.
543 * They may unregister all registered protocol families at once for
544 * a service by passing a NULL @address argument. If @netid is ""
545 * then all netids for [program, version, address] are unregistered.
547 * This function uses rpcbind protocol version 4 to contact the
548 * local rpcbind daemon. The local rpcbind daemon must support
549 * version 4 of the rpcbind protocol in order for these functions
550 * to register a service successfully.
552 * Supported netids include "udp" and "tcp" for UDP and TCP over
553 * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6,
556 * The contents of @address determine the address family and the
557 * port to be registered. The usual practice is to pass INADDR_ANY
558 * as the raw address, but specifying a non-zero address is also
559 * supported by this API if the caller wishes to advertise an RPC
560 * service on a specific network interface.
562 * Note that passing in INADDR_ANY does not create the same service
563 * registration as IN6ADDR_ANY. The former advertises an RPC
564 * service on any IPv4 address, but not on IPv6. The latter
565 * advertises the service on all IPv4 and IPv6 addresses.
567 int rpcb_v4_register(struct net *net, const u32 program, const u32 version,
568 const struct sockaddr *address, const char *netid)
570 struct rpcbind_args map = {
574 .r_owner = RPCB_OWNER_STRING,
576 struct rpc_message msg = {
579 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
581 if (sn->rpcb_local_clnt4 == NULL)
582 return -EPROTONOSUPPORT;
585 return rpcb_unregister_all_protofamilies(sn, &msg);
587 switch (address->sa_family) {
589 return rpcb_register_inet4(sn, address, &msg);
591 return rpcb_register_inet6(sn, address, &msg);
594 return -EAFNOSUPPORT;
597 static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc)
599 struct rpc_message msg = {
604 struct rpc_task_setup task_setup_data = {
605 .rpc_client = rpcb_clnt,
607 .callback_ops = &rpcb_getport_ops,
608 .callback_data = map,
609 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN,
612 return rpc_run_task(&task_setup_data);
616 * In the case where rpc clients have been cloned, we want to make
617 * sure that we use the program number/version etc of the actual
618 * owner of the xprt. To do so, we walk back up the tree of parents
619 * to find whoever created the transport and/or whoever has the
622 static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt)
624 struct rpc_clnt *parent = clnt->cl_parent;
625 struct rpc_xprt *xprt = rcu_dereference(clnt->cl_xprt);
627 while (parent != clnt) {
628 if (rcu_dereference(parent->cl_xprt) != xprt)
630 if (clnt->cl_autobind)
633 parent = parent->cl_parent;
639 * rpcb_getport_async - obtain the port for a given RPC service on a given host
640 * @task: task that is waiting for portmapper request
642 * This one can be called for an ongoing RPC request, and can be used in
643 * an async (rpciod) context.
645 void rpcb_getport_async(struct rpc_task *task)
647 struct rpc_clnt *clnt;
648 struct rpc_procinfo *proc;
650 struct rpc_xprt *xprt;
651 struct rpc_clnt *rpcb_clnt;
652 struct rpcbind_args *map;
653 struct rpc_task *child;
654 struct sockaddr_storage addr;
655 struct sockaddr *sap = (struct sockaddr *)&addr;
661 clnt = rpcb_find_transport_owner(task->tk_client);
662 xprt = xprt_get(rcu_dereference(clnt->cl_xprt));
663 } while (xprt == NULL);
666 dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
667 task->tk_pid, __func__,
668 xprt->servername, clnt->cl_prog, clnt->cl_vers, xprt->prot);
670 /* Put self on the wait queue to ensure we get notified if
671 * some other task is already attempting to bind the port */
672 rpc_sleep_on(&xprt->binding, task, NULL);
674 if (xprt_test_and_set_binding(xprt)) {
675 dprintk("RPC: %5u %s: waiting for another binder\n",
676 task->tk_pid, __func__);
681 /* Someone else may have bound if we slept */
682 if (xprt_bound(xprt)) {
684 dprintk("RPC: %5u %s: already bound\n",
685 task->tk_pid, __func__);
689 /* Parent transport's destination address */
690 salen = rpc_peeraddr(clnt, sap, sizeof(addr));
692 /* Don't ever use rpcbind v2 for AF_INET6 requests */
693 switch (sap->sa_family) {
695 proc = rpcb_next_version[xprt->bind_index].rpc_proc;
696 bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
699 proc = rpcb_next_version6[xprt->bind_index].rpc_proc;
700 bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers;
703 status = -EAFNOSUPPORT;
704 dprintk("RPC: %5u %s: bad address family\n",
705 task->tk_pid, __func__);
709 xprt->bind_index = 0;
710 status = -EPFNOSUPPORT;
711 dprintk("RPC: %5u %s: no more getport versions available\n",
712 task->tk_pid, __func__);
716 dprintk("RPC: %5u %s: trying rpcbind version %u\n",
717 task->tk_pid, __func__, bind_version);
719 rpcb_clnt = rpcb_create(xprt->xprt_net, xprt->servername, sap, salen,
720 xprt->prot, bind_version);
721 if (IS_ERR(rpcb_clnt)) {
722 status = PTR_ERR(rpcb_clnt);
723 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
724 task->tk_pid, __func__, PTR_ERR(rpcb_clnt));
728 map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
731 dprintk("RPC: %5u %s: no memory available\n",
732 task->tk_pid, __func__);
733 goto bailout_release_client;
735 map->r_prog = clnt->cl_prog;
736 map->r_vers = clnt->cl_vers;
737 map->r_prot = xprt->prot;
740 map->r_status = -EIO;
742 switch (bind_version) {
745 map->r_netid = xprt->address_strings[RPC_DISPLAY_NETID];
746 map->r_addr = rpc_sockaddr2uaddr(sap, GFP_ATOMIC);
756 child = rpcb_call_async(rpcb_clnt, map, proc);
757 rpc_release_client(rpcb_clnt);
759 /* rpcb_map_release() has freed the arguments */
760 dprintk("RPC: %5u %s: rpc_run_task failed\n",
761 task->tk_pid, __func__);
765 xprt->stat.bind_count++;
769 bailout_release_client:
770 rpc_release_client(rpcb_clnt);
772 rpcb_wake_rpcbind_waiters(xprt, status);
773 task->tk_status = status;
776 EXPORT_SYMBOL_GPL(rpcb_getport_async);
779 * Rpcbind child task calls this callback via tk_exit.
781 static void rpcb_getport_done(struct rpc_task *child, void *data)
783 struct rpcbind_args *map = data;
784 struct rpc_xprt *xprt = map->r_xprt;
785 int status = child->tk_status;
787 /* Garbage reply: retry with a lesser rpcbind version */
789 status = -EPROTONOSUPPORT;
791 /* rpcbind server doesn't support this rpcbind protocol version */
792 if (status == -EPROTONOSUPPORT)
796 /* rpcbind server not available on remote host? */
797 xprt->ops->set_port(xprt, 0);
798 } else if (map->r_port == 0) {
799 /* Requested RPC service wasn't registered on remote host */
800 xprt->ops->set_port(xprt, 0);
804 xprt->ops->set_port(xprt, map->r_port);
805 xprt_set_bound(xprt);
809 dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
810 child->tk_pid, status, map->r_port);
812 map->r_status = status;
816 * XDR functions for rpcbind
819 static void rpcb_enc_mapping(struct rpc_rqst *req, struct xdr_stream *xdr,
820 const struct rpcbind_args *rpcb)
824 dprintk("RPC: %5u encoding PMAP_%s call (%u, %u, %d, %u)\n",
825 req->rq_task->tk_pid,
826 req->rq_task->tk_msg.rpc_proc->p_name,
827 rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
829 p = xdr_reserve_space(xdr, RPCB_mappingargs_sz << 2);
830 *p++ = cpu_to_be32(rpcb->r_prog);
831 *p++ = cpu_to_be32(rpcb->r_vers);
832 *p++ = cpu_to_be32(rpcb->r_prot);
833 *p = cpu_to_be32(rpcb->r_port);
836 static int rpcb_dec_getport(struct rpc_rqst *req, struct xdr_stream *xdr,
837 struct rpcbind_args *rpcb)
844 p = xdr_inline_decode(xdr, 4);
845 if (unlikely(p == NULL))
848 port = be32_to_cpup(p);
849 dprintk("RPC: %5u PMAP_%s result: %lu\n", req->rq_task->tk_pid,
850 req->rq_task->tk_msg.rpc_proc->p_name, port);
851 if (unlikely(port > USHRT_MAX))
858 static int rpcb_dec_set(struct rpc_rqst *req, struct xdr_stream *xdr,
863 p = xdr_inline_decode(xdr, 4);
864 if (unlikely(p == NULL))
871 dprintk("RPC: %5u RPCB_%s call %s\n",
872 req->rq_task->tk_pid,
873 req->rq_task->tk_msg.rpc_proc->p_name,
874 (*boolp ? "succeeded" : "failed"));
878 static void encode_rpcb_string(struct xdr_stream *xdr, const char *string,
884 len = strlen(string);
885 BUG_ON(len > maxstrlen);
886 p = xdr_reserve_space(xdr, 4 + len);
887 xdr_encode_opaque(p, string, len);
890 static void rpcb_enc_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr,
891 const struct rpcbind_args *rpcb)
895 dprintk("RPC: %5u encoding RPCB_%s call (%u, %u, '%s', '%s')\n",
896 req->rq_task->tk_pid,
897 req->rq_task->tk_msg.rpc_proc->p_name,
898 rpcb->r_prog, rpcb->r_vers,
899 rpcb->r_netid, rpcb->r_addr);
901 p = xdr_reserve_space(xdr, (RPCB_program_sz + RPCB_version_sz) << 2);
902 *p++ = cpu_to_be32(rpcb->r_prog);
903 *p = cpu_to_be32(rpcb->r_vers);
905 encode_rpcb_string(xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN);
906 encode_rpcb_string(xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN);
907 encode_rpcb_string(xdr, rpcb->r_owner, RPCB_MAXOWNERLEN);
910 static int rpcb_dec_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr,
911 struct rpcbind_args *rpcb)
913 struct sockaddr_storage address;
914 struct sockaddr *sap = (struct sockaddr *)&address;
920 p = xdr_inline_decode(xdr, 4);
921 if (unlikely(p == NULL))
923 len = be32_to_cpup(p);
926 * If the returned universal address is a null string,
927 * the requested RPC service was not registered.
930 dprintk("RPC: %5u RPCB reply: program not registered\n",
931 req->rq_task->tk_pid);
935 if (unlikely(len > RPCBIND_MAXUADDRLEN))
938 p = xdr_inline_decode(xdr, len);
939 if (unlikely(p == NULL))
941 dprintk("RPC: %5u RPCB_%s reply: %s\n", req->rq_task->tk_pid,
942 req->rq_task->tk_msg.rpc_proc->p_name, (char *)p);
944 if (rpc_uaddr2sockaddr(req->rq_xprt->xprt_net, (char *)p, len,
945 sap, sizeof(address)) == 0)
947 rpcb->r_port = rpc_get_port(sap);
952 dprintk("RPC: %5u malformed RPCB_%s reply\n",
953 req->rq_task->tk_pid,
954 req->rq_task->tk_msg.rpc_proc->p_name);
959 * Not all rpcbind procedures described in RFC 1833 are implemented
960 * since the Linux kernel RPC code requires only these.
963 static struct rpc_procinfo rpcb_procedures2[] = {
965 .p_proc = RPCBPROC_SET,
966 .p_encode = (kxdreproc_t)rpcb_enc_mapping,
967 .p_decode = (kxdrdproc_t)rpcb_dec_set,
968 .p_arglen = RPCB_mappingargs_sz,
969 .p_replen = RPCB_setres_sz,
970 .p_statidx = RPCBPROC_SET,
975 .p_proc = RPCBPROC_UNSET,
976 .p_encode = (kxdreproc_t)rpcb_enc_mapping,
977 .p_decode = (kxdrdproc_t)rpcb_dec_set,
978 .p_arglen = RPCB_mappingargs_sz,
979 .p_replen = RPCB_setres_sz,
980 .p_statidx = RPCBPROC_UNSET,
984 [RPCBPROC_GETPORT] = {
985 .p_proc = RPCBPROC_GETPORT,
986 .p_encode = (kxdreproc_t)rpcb_enc_mapping,
987 .p_decode = (kxdrdproc_t)rpcb_dec_getport,
988 .p_arglen = RPCB_mappingargs_sz,
989 .p_replen = RPCB_getportres_sz,
990 .p_statidx = RPCBPROC_GETPORT,
996 static struct rpc_procinfo rpcb_procedures3[] = {
998 .p_proc = RPCBPROC_SET,
999 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
1000 .p_decode = (kxdrdproc_t)rpcb_dec_set,
1001 .p_arglen = RPCB_getaddrargs_sz,
1002 .p_replen = RPCB_setres_sz,
1003 .p_statidx = RPCBPROC_SET,
1007 [RPCBPROC_UNSET] = {
1008 .p_proc = RPCBPROC_UNSET,
1009 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
1010 .p_decode = (kxdrdproc_t)rpcb_dec_set,
1011 .p_arglen = RPCB_getaddrargs_sz,
1012 .p_replen = RPCB_setres_sz,
1013 .p_statidx = RPCBPROC_UNSET,
1017 [RPCBPROC_GETADDR] = {
1018 .p_proc = RPCBPROC_GETADDR,
1019 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
1020 .p_decode = (kxdrdproc_t)rpcb_dec_getaddr,
1021 .p_arglen = RPCB_getaddrargs_sz,
1022 .p_replen = RPCB_getaddrres_sz,
1023 .p_statidx = RPCBPROC_GETADDR,
1025 .p_name = "GETADDR",
1029 static struct rpc_procinfo rpcb_procedures4[] = {
1031 .p_proc = RPCBPROC_SET,
1032 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
1033 .p_decode = (kxdrdproc_t)rpcb_dec_set,
1034 .p_arglen = RPCB_getaddrargs_sz,
1035 .p_replen = RPCB_setres_sz,
1036 .p_statidx = RPCBPROC_SET,
1040 [RPCBPROC_UNSET] = {
1041 .p_proc = RPCBPROC_UNSET,
1042 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
1043 .p_decode = (kxdrdproc_t)rpcb_dec_set,
1044 .p_arglen = RPCB_getaddrargs_sz,
1045 .p_replen = RPCB_setres_sz,
1046 .p_statidx = RPCBPROC_UNSET,
1050 [RPCBPROC_GETADDR] = {
1051 .p_proc = RPCBPROC_GETADDR,
1052 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
1053 .p_decode = (kxdrdproc_t)rpcb_dec_getaddr,
1054 .p_arglen = RPCB_getaddrargs_sz,
1055 .p_replen = RPCB_getaddrres_sz,
1056 .p_statidx = RPCBPROC_GETADDR,
1058 .p_name = "GETADDR",
1062 static const struct rpcb_info rpcb_next_version[] = {
1064 .rpc_vers = RPCBVERS_2,
1065 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
1072 static const struct rpcb_info rpcb_next_version6[] = {
1074 .rpc_vers = RPCBVERS_4,
1075 .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR],
1078 .rpc_vers = RPCBVERS_3,
1079 .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR],
1086 static const struct rpc_version rpcb_version2 = {
1087 .number = RPCBVERS_2,
1088 .nrprocs = ARRAY_SIZE(rpcb_procedures2),
1089 .procs = rpcb_procedures2
1092 static const struct rpc_version rpcb_version3 = {
1093 .number = RPCBVERS_3,
1094 .nrprocs = ARRAY_SIZE(rpcb_procedures3),
1095 .procs = rpcb_procedures3
1098 static const struct rpc_version rpcb_version4 = {
1099 .number = RPCBVERS_4,
1100 .nrprocs = ARRAY_SIZE(rpcb_procedures4),
1101 .procs = rpcb_procedures4
1104 static const struct rpc_version *rpcb_version[] = {
1112 static struct rpc_stat rpcb_stats;
1114 static const struct rpc_program rpcb_program = {
1116 .number = RPCBIND_PROGRAM,
1117 .nrvers = ARRAY_SIZE(rpcb_version),
1118 .version = rpcb_version,
1119 .stats = &rpcb_stats,