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>
20 #include <linux/in6.h>
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/mutex.h>
24 #include <linux/slab.h>
27 #include <linux/sunrpc/clnt.h>
28 #include <linux/sunrpc/sched.h>
29 #include <linux/sunrpc/xprtsock.h>
32 # define RPCDBG_FACILITY RPCDBG_BIND
35 #define RPCBIND_PROGRAM (100000u)
36 #define RPCBIND_PORT (111u)
38 #define RPCBVERS_2 (2u)
39 #define RPCBVERS_3 (3u)
40 #define RPCBVERS_4 (4u)
47 RPCBPROC_GETADDR = 3, /* alias for GETPORT */
50 RPCBPROC_BCAST = 5, /* alias for CALLIT */
60 #define RPCB_HIGHPROC_2 RPCBPROC_CALLIT
61 #define RPCB_HIGHPROC_3 RPCBPROC_TADDR2UADDR
62 #define RPCB_HIGHPROC_4 RPCBPROC_GETSTAT
67 * The "owner" is allowed to unset a service in the rpcbind database.
69 * For AF_LOCAL SET/UNSET requests, rpcbind treats this string as a
70 * UID which it maps to a local user name via a password lookup.
71 * In all other cases it is ignored.
73 * For SET/UNSET requests, user space provides a value, even for
74 * network requests, and GETADDR uses an empty string. We follow
75 * those precedents here.
77 #define RPCB_OWNER_STRING "0"
78 #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
83 #define RPCB_program_sz (1)
84 #define RPCB_version_sz (1)
85 #define RPCB_protocol_sz (1)
86 #define RPCB_port_sz (1)
87 #define RPCB_boolean_sz (1)
89 #define RPCB_netid_sz (1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
90 #define RPCB_addr_sz (1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
91 #define RPCB_ownerstring_sz (1 + XDR_QUADLEN(RPCB_MAXOWNERLEN))
94 * XDR argument and result sizes
96 #define RPCB_mappingargs_sz (RPCB_program_sz + RPCB_version_sz + \
97 RPCB_protocol_sz + RPCB_port_sz)
98 #define RPCB_getaddrargs_sz (RPCB_program_sz + RPCB_version_sz + \
99 RPCB_netid_sz + RPCB_addr_sz + \
102 #define RPCB_getportres_sz RPCB_port_sz
103 #define RPCB_setres_sz RPCB_boolean_sz
106 * Note that RFC 1833 does not put any size restrictions on the
107 * address string returned by the remote rpcbind database.
109 #define RPCB_getaddrres_sz RPCB_addr_sz
111 static void rpcb_getport_done(struct rpc_task *, void *);
112 static void rpcb_map_release(void *data);
113 static struct rpc_program rpcb_program;
115 static struct rpc_clnt * rpcb_local_clnt;
116 static struct rpc_clnt * rpcb_local_clnt4;
118 struct rpcbind_args {
119 struct rpc_xprt * r_xprt;
124 unsigned short r_port;
125 const char * r_netid;
127 const char * r_owner;
132 static struct rpc_procinfo rpcb_procedures2[];
133 static struct rpc_procinfo rpcb_procedures3[];
134 static struct rpc_procinfo rpcb_procedures4[];
138 struct rpc_procinfo * rpc_proc;
141 static struct rpcb_info rpcb_next_version[];
142 static struct rpcb_info rpcb_next_version6[];
144 static const struct rpc_call_ops rpcb_getport_ops = {
145 .rpc_call_done = rpcb_getport_done,
146 .rpc_release = rpcb_map_release,
149 static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
151 xprt_clear_binding(xprt);
152 rpc_wake_up_status(&xprt->binding, status);
155 static void rpcb_map_release(void *data)
157 struct rpcbind_args *map = data;
159 rpcb_wake_rpcbind_waiters(map->r_xprt, map->r_status);
160 xprt_put(map->r_xprt);
165 static const struct sockaddr_in rpcb_inaddr_loopback = {
166 .sin_family = AF_INET,
167 .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
168 .sin_port = htons(RPCBIND_PORT),
171 static DEFINE_MUTEX(rpcb_create_local_mutex);
174 * Returns zero on success, otherwise a negative errno value
177 static int rpcb_create_local(void)
179 struct rpc_create_args args = {
181 .protocol = XPRT_TRANSPORT_TCP,
182 .address = (struct sockaddr *)&rpcb_inaddr_loopback,
183 .addrsize = sizeof(rpcb_inaddr_loopback),
184 .servername = "localhost",
185 .program = &rpcb_program,
186 .version = RPCBVERS_2,
187 .authflavor = RPC_AUTH_UNIX,
188 .flags = RPC_CLNT_CREATE_NOPING,
190 struct rpc_clnt *clnt, *clnt4;
196 mutex_lock(&rpcb_create_local_mutex);
200 clnt = rpc_create(&args);
202 dprintk("RPC: failed to create local rpcbind "
203 "client (errno %ld).\n", PTR_ERR(clnt));
204 result = -PTR_ERR(clnt);
209 * This results in an RPC ping. On systems running portmapper,
210 * the v4 ping will fail. Proceed anyway, but disallow rpcb
213 clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
215 dprintk("RPC: failed to create local rpcbind v4 "
216 "cleint (errno %ld).\n", PTR_ERR(clnt4));
220 rpcb_local_clnt = clnt;
221 rpcb_local_clnt4 = clnt4;
224 mutex_unlock(&rpcb_create_local_mutex);
228 static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
229 size_t salen, int proto, u32 version)
231 struct rpc_create_args args = {
236 .servername = hostname,
237 .program = &rpcb_program,
239 .authflavor = RPC_AUTH_UNIX,
240 .flags = (RPC_CLNT_CREATE_NOPING |
241 RPC_CLNT_CREATE_NONPRIVPORT),
244 switch (srvaddr->sa_family) {
246 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
249 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
252 return ERR_PTR(-EAFNOSUPPORT);
255 return rpc_create(&args);
258 static int rpcb_register_call(struct rpc_clnt *clnt, struct rpc_message *msg)
260 int result, error = 0;
262 msg->rpc_resp = &result;
264 error = rpc_call_sync(clnt, msg, RPC_TASK_SOFTCONN);
266 dprintk("RPC: failed to contact local rpcbind "
267 "server (errno %d).\n", -error);
277 * rpcb_register - set or unset a port registration with the local rpcbind svc
278 * @prog: RPC program number to bind
279 * @vers: RPC version number to bind
280 * @prot: transport protocol to register
281 * @port: port value to register
283 * Returns zero if the registration request was dispatched successfully
284 * and the rpcbind daemon returned success. Otherwise, returns an errno
285 * value that reflects the nature of the error (request could not be
286 * dispatched, timed out, or rpcbind returned an error).
288 * RPC services invoke this function to advertise their contact
289 * information via the system's rpcbind daemon. RPC services
290 * invoke this function once for each [program, version, transport]
291 * tuple they wish to advertise.
293 * Callers may also unregister RPC services that are no longer
294 * available by setting the passed-in port to zero. This removes
295 * all registered transports for [program, version] from the local
298 * This function uses rpcbind protocol version 2 to contact the
299 * local rpcbind daemon.
301 * Registration works over both AF_INET and AF_INET6, and services
302 * registered via this function are advertised as available for any
303 * address. If the local rpcbind daemon is listening on AF_INET6,
304 * services registered via this function will be advertised on
305 * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6
308 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
310 struct rpcbind_args map = {
316 struct rpc_message msg = {
321 error = rpcb_create_local();
325 dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
326 "rpcbind\n", (port ? "" : "un"),
327 prog, vers, prot, port);
329 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET];
331 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET];
333 return rpcb_register_call(rpcb_local_clnt, &msg);
337 * Fill in AF_INET family-specific arguments to register
339 static int rpcb_register_inet4(const struct sockaddr *sap,
340 struct rpc_message *msg)
342 const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
343 struct rpcbind_args *map = msg->rpc_argp;
344 unsigned short port = ntohs(sin->sin_port);
347 map->r_addr = rpc_sockaddr2uaddr(sap);
349 dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
350 "local rpcbind\n", (port ? "" : "un"),
351 map->r_prog, map->r_vers,
352 map->r_addr, map->r_netid);
354 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
356 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
358 result = rpcb_register_call(rpcb_local_clnt4, msg);
364 * Fill in AF_INET6 family-specific arguments to register
366 static int rpcb_register_inet6(const struct sockaddr *sap,
367 struct rpc_message *msg)
369 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap;
370 struct rpcbind_args *map = msg->rpc_argp;
371 unsigned short port = ntohs(sin6->sin6_port);
374 map->r_addr = rpc_sockaddr2uaddr(sap);
376 dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
377 "local rpcbind\n", (port ? "" : "un"),
378 map->r_prog, map->r_vers,
379 map->r_addr, map->r_netid);
381 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
383 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
385 result = rpcb_register_call(rpcb_local_clnt4, msg);
390 static int rpcb_unregister_all_protofamilies(struct rpc_message *msg)
392 struct rpcbind_args *map = msg->rpc_argp;
394 dprintk("RPC: unregistering [%u, %u, '%s'] with "
396 map->r_prog, map->r_vers, map->r_netid);
399 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
401 return rpcb_register_call(rpcb_local_clnt4, msg);
405 * rpcb_v4_register - set or unset a port registration with the local rpcbind
406 * @program: RPC program number of service to (un)register
407 * @version: RPC version number of service to (un)register
408 * @address: address family, IP address, and port to (un)register
409 * @netid: netid of transport protocol to (un)register
411 * Returns zero if the registration request was dispatched successfully
412 * and the rpcbind daemon returned success. Otherwise, returns an errno
413 * value that reflects the nature of the error (request could not be
414 * dispatched, timed out, or rpcbind returned an error).
416 * RPC services invoke this function to advertise their contact
417 * information via the system's rpcbind daemon. RPC services
418 * invoke this function once for each [program, version, address,
419 * netid] tuple they wish to advertise.
421 * Callers may also unregister RPC services that are registered at a
422 * specific address by setting the port number in @address to zero.
423 * They may unregister all registered protocol families at once for
424 * a service by passing a NULL @address argument. If @netid is ""
425 * then all netids for [program, version, address] are unregistered.
427 * This function uses rpcbind protocol version 4 to contact the
428 * local rpcbind daemon. The local rpcbind daemon must support
429 * version 4 of the rpcbind protocol in order for these functions
430 * to register a service successfully.
432 * Supported netids include "udp" and "tcp" for UDP and TCP over
433 * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6,
436 * The contents of @address determine the address family and the
437 * port to be registered. The usual practice is to pass INADDR_ANY
438 * as the raw address, but specifying a non-zero address is also
439 * supported by this API if the caller wishes to advertise an RPC
440 * service on a specific network interface.
442 * Note that passing in INADDR_ANY does not create the same service
443 * registration as IN6ADDR_ANY. The former advertises an RPC
444 * service on any IPv4 address, but not on IPv6. The latter
445 * advertises the service on all IPv4 and IPv6 addresses.
447 int rpcb_v4_register(const u32 program, const u32 version,
448 const struct sockaddr *address, const char *netid)
450 struct rpcbind_args map = {
454 .r_owner = RPCB_OWNER_STRING,
456 struct rpc_message msg = {
461 error = rpcb_create_local();
464 if (rpcb_local_clnt4 == NULL)
465 return -EPROTONOSUPPORT;
468 return rpcb_unregister_all_protofamilies(&msg);
470 switch (address->sa_family) {
472 return rpcb_register_inet4(address, &msg);
474 return rpcb_register_inet6(address, &msg);
477 return -EAFNOSUPPORT;
481 * rpcb_getport_sync - obtain the port for an RPC service on a given host
482 * @sin: address of remote peer
483 * @prog: RPC program number to bind
484 * @vers: RPC version number to bind
485 * @prot: transport protocol to use to make this request
487 * Return value is the requested advertised port number,
488 * or a negative errno value.
490 * Called from outside the RPC client in a synchronous task context.
491 * Uses default timeout parameters specified by underlying transport.
493 * XXX: Needs to support IPv6
495 int rpcb_getport_sync(struct sockaddr_in *sin, u32 prog, u32 vers, int prot)
497 struct rpcbind_args map = {
503 struct rpc_message msg = {
504 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
508 struct rpc_clnt *rpcb_clnt;
511 dprintk("RPC: %s(%pI4, %u, %u, %d)\n",
512 __func__, &sin->sin_addr.s_addr, prog, vers, prot);
514 rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin,
515 sizeof(*sin), prot, RPCBVERS_2);
516 if (IS_ERR(rpcb_clnt))
517 return PTR_ERR(rpcb_clnt);
519 status = rpc_call_sync(rpcb_clnt, &msg, 0);
520 rpc_shutdown_client(rpcb_clnt);
529 EXPORT_SYMBOL_GPL(rpcb_getport_sync);
531 static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc)
533 struct rpc_message msg = {
538 struct rpc_task_setup task_setup_data = {
539 .rpc_client = rpcb_clnt,
541 .callback_ops = &rpcb_getport_ops,
542 .callback_data = map,
543 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN,
546 return rpc_run_task(&task_setup_data);
550 * In the case where rpc clients have been cloned, we want to make
551 * sure that we use the program number/version etc of the actual
552 * owner of the xprt. To do so, we walk back up the tree of parents
553 * to find whoever created the transport and/or whoever has the
556 static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt)
558 struct rpc_clnt *parent = clnt->cl_parent;
560 while (parent != clnt) {
561 if (parent->cl_xprt != clnt->cl_xprt)
563 if (clnt->cl_autobind)
566 parent = parent->cl_parent;
572 * rpcb_getport_async - obtain the port for a given RPC service on a given host
573 * @task: task that is waiting for portmapper request
575 * This one can be called for an ongoing RPC request, and can be used in
576 * an async (rpciod) context.
578 void rpcb_getport_async(struct rpc_task *task)
580 struct rpc_clnt *clnt;
581 struct rpc_procinfo *proc;
583 struct rpc_xprt *xprt;
584 struct rpc_clnt *rpcb_clnt;
585 static struct rpcbind_args *map;
586 struct rpc_task *child;
587 struct sockaddr_storage addr;
588 struct sockaddr *sap = (struct sockaddr *)&addr;
592 clnt = rpcb_find_transport_owner(task->tk_client);
593 xprt = clnt->cl_xprt;
595 dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
596 task->tk_pid, __func__,
597 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
599 /* Put self on the wait queue to ensure we get notified if
600 * some other task is already attempting to bind the port */
601 rpc_sleep_on(&xprt->binding, task, NULL);
603 if (xprt_test_and_set_binding(xprt)) {
604 dprintk("RPC: %5u %s: waiting for another binder\n",
605 task->tk_pid, __func__);
609 /* Someone else may have bound if we slept */
610 if (xprt_bound(xprt)) {
612 dprintk("RPC: %5u %s: already bound\n",
613 task->tk_pid, __func__);
617 /* Parent transport's destination address */
618 salen = rpc_peeraddr(clnt, sap, sizeof(addr));
620 /* Don't ever use rpcbind v2 for AF_INET6 requests */
621 switch (sap->sa_family) {
623 proc = rpcb_next_version[xprt->bind_index].rpc_proc;
624 bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
627 proc = rpcb_next_version6[xprt->bind_index].rpc_proc;
628 bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers;
631 status = -EAFNOSUPPORT;
632 dprintk("RPC: %5u %s: bad address family\n",
633 task->tk_pid, __func__);
637 xprt->bind_index = 0;
638 status = -EPFNOSUPPORT;
639 dprintk("RPC: %5u %s: no more getport versions available\n",
640 task->tk_pid, __func__);
644 dprintk("RPC: %5u %s: trying rpcbind version %u\n",
645 task->tk_pid, __func__, bind_version);
647 rpcb_clnt = rpcb_create(clnt->cl_server, sap, salen, xprt->prot,
649 if (IS_ERR(rpcb_clnt)) {
650 status = PTR_ERR(rpcb_clnt);
651 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
652 task->tk_pid, __func__, PTR_ERR(rpcb_clnt));
656 map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
659 dprintk("RPC: %5u %s: no memory available\n",
660 task->tk_pid, __func__);
661 goto bailout_release_client;
663 map->r_prog = clnt->cl_prog;
664 map->r_vers = clnt->cl_vers;
665 map->r_prot = xprt->prot;
667 map->r_xprt = xprt_get(xprt);
668 map->r_status = -EIO;
670 switch (bind_version) {
673 map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
674 map->r_addr = rpc_sockaddr2uaddr(sap);
684 child = rpcb_call_async(rpcb_clnt, map, proc);
685 rpc_release_client(rpcb_clnt);
687 /* rpcb_map_release() has freed the arguments */
688 dprintk("RPC: %5u %s: rpc_run_task failed\n",
689 task->tk_pid, __func__);
693 xprt->stat.bind_count++;
697 bailout_release_client:
698 rpc_release_client(rpcb_clnt);
700 rpcb_wake_rpcbind_waiters(xprt, status);
701 task->tk_status = status;
703 EXPORT_SYMBOL_GPL(rpcb_getport_async);
706 * Rpcbind child task calls this callback via tk_exit.
708 static void rpcb_getport_done(struct rpc_task *child, void *data)
710 struct rpcbind_args *map = data;
711 struct rpc_xprt *xprt = map->r_xprt;
712 int status = child->tk_status;
714 /* Garbage reply: retry with a lesser rpcbind version */
716 status = -EPROTONOSUPPORT;
718 /* rpcbind server doesn't support this rpcbind protocol version */
719 if (status == -EPROTONOSUPPORT)
723 /* rpcbind server not available on remote host? */
724 xprt->ops->set_port(xprt, 0);
725 } else if (map->r_port == 0) {
726 /* Requested RPC service wasn't registered on remote host */
727 xprt->ops->set_port(xprt, 0);
731 xprt->ops->set_port(xprt, map->r_port);
732 xprt_set_bound(xprt);
736 dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
737 child->tk_pid, status, map->r_port);
739 map->r_status = status;
743 * XDR functions for rpcbind
746 static int rpcb_enc_mapping(struct rpc_rqst *req, __be32 *p,
747 const struct rpcbind_args *rpcb)
749 struct rpc_task *task = req->rq_task;
750 struct xdr_stream xdr;
752 dprintk("RPC: %5u encoding PMAP_%s call (%u, %u, %d, %u)\n",
753 task->tk_pid, task->tk_msg.rpc_proc->p_name,
754 rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
756 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
758 p = xdr_reserve_space(&xdr, sizeof(__be32) * RPCB_mappingargs_sz);
759 if (unlikely(p == NULL))
762 *p++ = htonl(rpcb->r_prog);
763 *p++ = htonl(rpcb->r_vers);
764 *p++ = htonl(rpcb->r_prot);
765 *p = htonl(rpcb->r_port);
770 static int rpcb_dec_getport(struct rpc_rqst *req, __be32 *p,
771 struct rpcbind_args *rpcb)
773 struct rpc_task *task = req->rq_task;
774 struct xdr_stream xdr;
777 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
781 p = xdr_inline_decode(&xdr, sizeof(__be32));
782 if (unlikely(p == NULL))
786 dprintk("RPC: %5u PMAP_%s result: %lu\n", task->tk_pid,
787 task->tk_msg.rpc_proc->p_name, port);
788 if (unlikely(port > USHRT_MAX))
795 static int rpcb_dec_set(struct rpc_rqst *req, __be32 *p,
798 struct rpc_task *task = req->rq_task;
799 struct xdr_stream xdr;
801 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
803 p = xdr_inline_decode(&xdr, sizeof(__be32));
804 if (unlikely(p == NULL))
811 dprintk("RPC: %5u RPCB_%s call %s\n",
812 task->tk_pid, task->tk_msg.rpc_proc->p_name,
813 (*boolp ? "succeeded" : "failed"));
817 static int encode_rpcb_string(struct xdr_stream *xdr, const char *string,
823 if (unlikely(string == NULL))
825 len = strlen(string);
826 if (unlikely(len > maxstrlen))
829 p = xdr_reserve_space(xdr, sizeof(__be32) + len);
830 if (unlikely(p == NULL))
832 xdr_encode_opaque(p, string, len);
837 static int rpcb_enc_getaddr(struct rpc_rqst *req, __be32 *p,
838 const struct rpcbind_args *rpcb)
840 struct rpc_task *task = req->rq_task;
841 struct xdr_stream xdr;
843 dprintk("RPC: %5u encoding RPCB_%s call (%u, %u, '%s', '%s')\n",
844 task->tk_pid, task->tk_msg.rpc_proc->p_name,
845 rpcb->r_prog, rpcb->r_vers,
846 rpcb->r_netid, rpcb->r_addr);
848 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
850 p = xdr_reserve_space(&xdr,
851 sizeof(__be32) * (RPCB_program_sz + RPCB_version_sz));
852 if (unlikely(p == NULL))
854 *p++ = htonl(rpcb->r_prog);
855 *p = htonl(rpcb->r_vers);
857 if (encode_rpcb_string(&xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN))
859 if (encode_rpcb_string(&xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN))
861 if (encode_rpcb_string(&xdr, rpcb->r_owner, RPCB_MAXOWNERLEN))
867 static int rpcb_dec_getaddr(struct rpc_rqst *req, __be32 *p,
868 struct rpcbind_args *rpcb)
870 struct sockaddr_storage address;
871 struct sockaddr *sap = (struct sockaddr *)&address;
872 struct rpc_task *task = req->rq_task;
873 struct xdr_stream xdr;
878 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
880 p = xdr_inline_decode(&xdr, sizeof(__be32));
881 if (unlikely(p == NULL))
886 * If the returned universal address is a null string,
887 * the requested RPC service was not registered.
890 dprintk("RPC: %5u RPCB reply: program not registered\n",
895 if (unlikely(len > RPCBIND_MAXUADDRLEN))
898 p = xdr_inline_decode(&xdr, len);
899 if (unlikely(p == NULL))
901 dprintk("RPC: %5u RPCB_%s reply: %s\n", task->tk_pid,
902 task->tk_msg.rpc_proc->p_name, (char *)p);
904 if (rpc_uaddr2sockaddr((char *)p, len, sap, sizeof(address)) == 0)
906 rpcb->r_port = rpc_get_port(sap);
911 dprintk("RPC: %5u malformed RPCB_%s reply\n",
912 task->tk_pid, task->tk_msg.rpc_proc->p_name);
917 * Not all rpcbind procedures described in RFC 1833 are implemented
918 * since the Linux kernel RPC code requires only these.
921 static struct rpc_procinfo rpcb_procedures2[] = {
923 .p_proc = RPCBPROC_SET,
924 .p_encode = (kxdrproc_t)rpcb_enc_mapping,
925 .p_decode = (kxdrproc_t)rpcb_dec_set,
926 .p_arglen = RPCB_mappingargs_sz,
927 .p_replen = RPCB_setres_sz,
928 .p_statidx = RPCBPROC_SET,
933 .p_proc = RPCBPROC_UNSET,
934 .p_encode = (kxdrproc_t)rpcb_enc_mapping,
935 .p_decode = (kxdrproc_t)rpcb_dec_set,
936 .p_arglen = RPCB_mappingargs_sz,
937 .p_replen = RPCB_setres_sz,
938 .p_statidx = RPCBPROC_UNSET,
942 [RPCBPROC_GETPORT] = {
943 .p_proc = RPCBPROC_GETPORT,
944 .p_encode = (kxdrproc_t)rpcb_enc_mapping,
945 .p_decode = (kxdrproc_t)rpcb_dec_getport,
946 .p_arglen = RPCB_mappingargs_sz,
947 .p_replen = RPCB_getportres_sz,
948 .p_statidx = RPCBPROC_GETPORT,
954 static struct rpc_procinfo rpcb_procedures3[] = {
956 .p_proc = RPCBPROC_SET,
957 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
958 .p_decode = (kxdrproc_t)rpcb_dec_set,
959 .p_arglen = RPCB_getaddrargs_sz,
960 .p_replen = RPCB_setres_sz,
961 .p_statidx = RPCBPROC_SET,
966 .p_proc = RPCBPROC_UNSET,
967 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
968 .p_decode = (kxdrproc_t)rpcb_dec_set,
969 .p_arglen = RPCB_getaddrargs_sz,
970 .p_replen = RPCB_setres_sz,
971 .p_statidx = RPCBPROC_UNSET,
975 [RPCBPROC_GETADDR] = {
976 .p_proc = RPCBPROC_GETADDR,
977 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
978 .p_decode = (kxdrproc_t)rpcb_dec_getaddr,
979 .p_arglen = RPCB_getaddrargs_sz,
980 .p_replen = RPCB_getaddrres_sz,
981 .p_statidx = RPCBPROC_GETADDR,
987 static struct rpc_procinfo rpcb_procedures4[] = {
989 .p_proc = RPCBPROC_SET,
990 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
991 .p_decode = (kxdrproc_t)rpcb_dec_set,
992 .p_arglen = RPCB_getaddrargs_sz,
993 .p_replen = RPCB_setres_sz,
994 .p_statidx = RPCBPROC_SET,
999 .p_proc = RPCBPROC_UNSET,
1000 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
1001 .p_decode = (kxdrproc_t)rpcb_dec_set,
1002 .p_arglen = RPCB_getaddrargs_sz,
1003 .p_replen = RPCB_setres_sz,
1004 .p_statidx = RPCBPROC_UNSET,
1008 [RPCBPROC_GETADDR] = {
1009 .p_proc = RPCBPROC_GETADDR,
1010 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
1011 .p_decode = (kxdrproc_t)rpcb_dec_getaddr,
1012 .p_arglen = RPCB_getaddrargs_sz,
1013 .p_replen = RPCB_getaddrres_sz,
1014 .p_statidx = RPCBPROC_GETADDR,
1016 .p_name = "GETADDR",
1020 static struct rpcb_info rpcb_next_version[] = {
1022 .rpc_vers = RPCBVERS_2,
1023 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
1030 static struct rpcb_info rpcb_next_version6[] = {
1032 .rpc_vers = RPCBVERS_4,
1033 .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR],
1036 .rpc_vers = RPCBVERS_3,
1037 .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR],
1044 static struct rpc_version rpcb_version2 = {
1045 .number = RPCBVERS_2,
1046 .nrprocs = RPCB_HIGHPROC_2,
1047 .procs = rpcb_procedures2
1050 static struct rpc_version rpcb_version3 = {
1051 .number = RPCBVERS_3,
1052 .nrprocs = RPCB_HIGHPROC_3,
1053 .procs = rpcb_procedures3
1056 static struct rpc_version rpcb_version4 = {
1057 .number = RPCBVERS_4,
1058 .nrprocs = RPCB_HIGHPROC_4,
1059 .procs = rpcb_procedures4
1062 static struct rpc_version *rpcb_version[] = {
1070 static struct rpc_stat rpcb_stats;
1072 static struct rpc_program rpcb_program = {
1074 .number = RPCBIND_PROGRAM,
1075 .nrvers = ARRAY_SIZE(rpcb_version),
1076 .version = rpcb_version,
1077 .stats = &rpcb_stats,
1081 * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister
1084 void cleanup_rpcb_clnt(void)
1086 if (rpcb_local_clnt4)
1087 rpc_shutdown_client(rpcb_local_clnt4);
1088 if (rpcb_local_clnt)
1089 rpc_shutdown_client(rpcb_local_clnt);