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 = {
180 .protocol = XPRT_TRANSPORT_TCP,
181 .address = (struct sockaddr *)&rpcb_inaddr_loopback,
182 .addrsize = sizeof(rpcb_inaddr_loopback),
183 .servername = "localhost",
184 .program = &rpcb_program,
185 .version = RPCBVERS_2,
186 .authflavor = RPC_AUTH_UNIX,
187 .flags = RPC_CLNT_CREATE_NOPING,
189 struct rpc_clnt *clnt, *clnt4;
195 mutex_lock(&rpcb_create_local_mutex);
199 clnt = rpc_create(&args);
201 dprintk("RPC: failed to create local rpcbind "
202 "client (errno %ld).\n", PTR_ERR(clnt));
203 result = -PTR_ERR(clnt);
208 * This results in an RPC ping. On systems running portmapper,
209 * the v4 ping will fail. Proceed anyway, but disallow rpcb
212 clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
214 dprintk("RPC: failed to create local rpcbind v4 "
215 "cleint (errno %ld).\n", PTR_ERR(clnt4));
219 rpcb_local_clnt = clnt;
220 rpcb_local_clnt4 = clnt4;
223 mutex_unlock(&rpcb_create_local_mutex);
227 static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
228 size_t salen, int proto, u32 version)
230 struct rpc_create_args args = {
234 .servername = hostname,
235 .program = &rpcb_program,
237 .authflavor = RPC_AUTH_UNIX,
238 .flags = (RPC_CLNT_CREATE_NOPING |
239 RPC_CLNT_CREATE_NONPRIVPORT),
242 switch (srvaddr->sa_family) {
244 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
247 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
253 return rpc_create(&args);
256 static int rpcb_register_call(struct rpc_clnt *clnt, struct rpc_message *msg)
258 int result, error = 0;
260 msg->rpc_resp = &result;
262 error = rpc_call_sync(clnt, msg, RPC_TASK_SOFTCONN);
264 dprintk("RPC: failed to contact local rpcbind "
265 "server (errno %d).\n", -error);
275 * rpcb_register - set or unset a port registration with the local rpcbind svc
276 * @prog: RPC program number to bind
277 * @vers: RPC version number to bind
278 * @prot: transport protocol to register
279 * @port: port value to register
281 * Returns zero if the registration request was dispatched successfully
282 * and the rpcbind daemon returned success. Otherwise, returns an errno
283 * value that reflects the nature of the error (request could not be
284 * dispatched, timed out, or rpcbind returned an error).
286 * RPC services invoke this function to advertise their contact
287 * information via the system's rpcbind daemon. RPC services
288 * invoke this function once for each [program, version, transport]
289 * tuple they wish to advertise.
291 * Callers may also unregister RPC services that are no longer
292 * available by setting the passed-in port to zero. This removes
293 * all registered transports for [program, version] from the local
296 * This function uses rpcbind protocol version 2 to contact the
297 * local rpcbind daemon.
299 * Registration works over both AF_INET and AF_INET6, and services
300 * registered via this function are advertised as available for any
301 * address. If the local rpcbind daemon is listening on AF_INET6,
302 * services registered via this function will be advertised on
303 * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6
306 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
308 struct rpcbind_args map = {
314 struct rpc_message msg = {
319 error = rpcb_create_local();
323 dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
324 "rpcbind\n", (port ? "" : "un"),
325 prog, vers, prot, port);
327 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET];
329 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET];
331 return rpcb_register_call(rpcb_local_clnt, &msg);
335 * Fill in AF_INET family-specific arguments to register
337 static int rpcb_register_inet4(const struct sockaddr *sap,
338 struct rpc_message *msg)
340 const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
341 struct rpcbind_args *map = msg->rpc_argp;
342 unsigned short port = ntohs(sin->sin_port);
345 map->r_addr = rpc_sockaddr2uaddr(sap);
347 dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
348 "local rpcbind\n", (port ? "" : "un"),
349 map->r_prog, map->r_vers,
350 map->r_addr, map->r_netid);
352 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
354 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
356 result = rpcb_register_call(rpcb_local_clnt4, msg);
362 * Fill in AF_INET6 family-specific arguments to register
364 static int rpcb_register_inet6(const struct sockaddr *sap,
365 struct rpc_message *msg)
367 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap;
368 struct rpcbind_args *map = msg->rpc_argp;
369 unsigned short port = ntohs(sin6->sin6_port);
372 map->r_addr = rpc_sockaddr2uaddr(sap);
374 dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
375 "local rpcbind\n", (port ? "" : "un"),
376 map->r_prog, map->r_vers,
377 map->r_addr, map->r_netid);
379 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
381 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
383 result = rpcb_register_call(rpcb_local_clnt4, msg);
388 static int rpcb_unregister_all_protofamilies(struct rpc_message *msg)
390 struct rpcbind_args *map = msg->rpc_argp;
392 dprintk("RPC: unregistering [%u, %u, '%s'] with "
394 map->r_prog, map->r_vers, map->r_netid);
397 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
399 return rpcb_register_call(rpcb_local_clnt4, msg);
403 * rpcb_v4_register - set or unset a port registration with the local rpcbind
404 * @program: RPC program number of service to (un)register
405 * @version: RPC version number of service to (un)register
406 * @address: address family, IP address, and port to (un)register
407 * @netid: netid of transport protocol to (un)register
409 * Returns zero if the registration request was dispatched successfully
410 * and the rpcbind daemon returned success. Otherwise, returns an errno
411 * value that reflects the nature of the error (request could not be
412 * dispatched, timed out, or rpcbind returned an error).
414 * RPC services invoke this function to advertise their contact
415 * information via the system's rpcbind daemon. RPC services
416 * invoke this function once for each [program, version, address,
417 * netid] tuple they wish to advertise.
419 * Callers may also unregister RPC services that are registered at a
420 * specific address by setting the port number in @address to zero.
421 * They may unregister all registered protocol families at once for
422 * a service by passing a NULL @address argument. If @netid is ""
423 * then all netids for [program, version, address] are unregistered.
425 * This function uses rpcbind protocol version 4 to contact the
426 * local rpcbind daemon. The local rpcbind daemon must support
427 * version 4 of the rpcbind protocol in order for these functions
428 * to register a service successfully.
430 * Supported netids include "udp" and "tcp" for UDP and TCP over
431 * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6,
434 * The contents of @address determine the address family and the
435 * port to be registered. The usual practice is to pass INADDR_ANY
436 * as the raw address, but specifying a non-zero address is also
437 * supported by this API if the caller wishes to advertise an RPC
438 * service on a specific network interface.
440 * Note that passing in INADDR_ANY does not create the same service
441 * registration as IN6ADDR_ANY. The former advertises an RPC
442 * service on any IPv4 address, but not on IPv6. The latter
443 * advertises the service on all IPv4 and IPv6 addresses.
445 int rpcb_v4_register(const u32 program, const u32 version,
446 const struct sockaddr *address, const char *netid)
448 struct rpcbind_args map = {
452 .r_owner = RPCB_OWNER_STRING,
454 struct rpc_message msg = {
459 error = rpcb_create_local();
462 if (rpcb_local_clnt4 == NULL)
463 return -EPROTONOSUPPORT;
466 return rpcb_unregister_all_protofamilies(&msg);
468 switch (address->sa_family) {
470 return rpcb_register_inet4(address, &msg);
472 return rpcb_register_inet6(address, &msg);
475 return -EAFNOSUPPORT;
479 * rpcb_getport_sync - obtain the port for an RPC service on a given host
480 * @sin: address of remote peer
481 * @prog: RPC program number to bind
482 * @vers: RPC version number to bind
483 * @prot: transport protocol to use to make this request
485 * Return value is the requested advertised port number,
486 * or a negative errno value.
488 * Called from outside the RPC client in a synchronous task context.
489 * Uses default timeout parameters specified by underlying transport.
491 * XXX: Needs to support IPv6
493 int rpcb_getport_sync(struct sockaddr_in *sin, u32 prog, u32 vers, int prot)
495 struct rpcbind_args map = {
501 struct rpc_message msg = {
502 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
506 struct rpc_clnt *rpcb_clnt;
509 dprintk("RPC: %s(%pI4, %u, %u, %d)\n",
510 __func__, &sin->sin_addr.s_addr, prog, vers, prot);
512 rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin,
513 sizeof(*sin), prot, RPCBVERS_2);
514 if (IS_ERR(rpcb_clnt))
515 return PTR_ERR(rpcb_clnt);
517 status = rpc_call_sync(rpcb_clnt, &msg, 0);
518 rpc_shutdown_client(rpcb_clnt);
527 EXPORT_SYMBOL_GPL(rpcb_getport_sync);
529 static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc)
531 struct rpc_message msg = {
536 struct rpc_task_setup task_setup_data = {
537 .rpc_client = rpcb_clnt,
539 .callback_ops = &rpcb_getport_ops,
540 .callback_data = map,
541 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN,
544 return rpc_run_task(&task_setup_data);
548 * In the case where rpc clients have been cloned, we want to make
549 * sure that we use the program number/version etc of the actual
550 * owner of the xprt. To do so, we walk back up the tree of parents
551 * to find whoever created the transport and/or whoever has the
554 static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt)
556 struct rpc_clnt *parent = clnt->cl_parent;
558 while (parent != clnt) {
559 if (parent->cl_xprt != clnt->cl_xprt)
561 if (clnt->cl_autobind)
564 parent = parent->cl_parent;
570 * rpcb_getport_async - obtain the port for a given RPC service on a given host
571 * @task: task that is waiting for portmapper request
573 * This one can be called for an ongoing RPC request, and can be used in
574 * an async (rpciod) context.
576 void rpcb_getport_async(struct rpc_task *task)
578 struct rpc_clnt *clnt;
579 struct rpc_procinfo *proc;
581 struct rpc_xprt *xprt;
582 struct rpc_clnt *rpcb_clnt;
583 static struct rpcbind_args *map;
584 struct rpc_task *child;
585 struct sockaddr_storage addr;
586 struct sockaddr *sap = (struct sockaddr *)&addr;
590 clnt = rpcb_find_transport_owner(task->tk_client);
591 xprt = clnt->cl_xprt;
593 dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
594 task->tk_pid, __func__,
595 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
597 /* Put self on the wait queue to ensure we get notified if
598 * some other task is already attempting to bind the port */
599 rpc_sleep_on(&xprt->binding, task, NULL);
601 if (xprt_test_and_set_binding(xprt)) {
602 dprintk("RPC: %5u %s: waiting for another binder\n",
603 task->tk_pid, __func__);
607 /* Someone else may have bound if we slept */
608 if (xprt_bound(xprt)) {
610 dprintk("RPC: %5u %s: already bound\n",
611 task->tk_pid, __func__);
615 /* Parent transport's destination address */
616 salen = rpc_peeraddr(clnt, sap, sizeof(addr));
618 /* Don't ever use rpcbind v2 for AF_INET6 requests */
619 switch (sap->sa_family) {
621 proc = rpcb_next_version[xprt->bind_index].rpc_proc;
622 bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
625 proc = rpcb_next_version6[xprt->bind_index].rpc_proc;
626 bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers;
629 status = -EAFNOSUPPORT;
630 dprintk("RPC: %5u %s: bad address family\n",
631 task->tk_pid, __func__);
635 xprt->bind_index = 0;
636 status = -EPFNOSUPPORT;
637 dprintk("RPC: %5u %s: no more getport versions available\n",
638 task->tk_pid, __func__);
642 dprintk("RPC: %5u %s: trying rpcbind version %u\n",
643 task->tk_pid, __func__, bind_version);
645 rpcb_clnt = rpcb_create(clnt->cl_server, sap, salen, xprt->prot,
647 if (IS_ERR(rpcb_clnt)) {
648 status = PTR_ERR(rpcb_clnt);
649 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
650 task->tk_pid, __func__, PTR_ERR(rpcb_clnt));
654 map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
657 dprintk("RPC: %5u %s: no memory available\n",
658 task->tk_pid, __func__);
659 goto bailout_release_client;
661 map->r_prog = clnt->cl_prog;
662 map->r_vers = clnt->cl_vers;
663 map->r_prot = xprt->prot;
665 map->r_xprt = xprt_get(xprt);
666 map->r_status = -EIO;
668 switch (bind_version) {
671 map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
672 map->r_addr = rpc_sockaddr2uaddr(sap);
682 child = rpcb_call_async(rpcb_clnt, map, proc);
683 rpc_release_client(rpcb_clnt);
685 /* rpcb_map_release() has freed the arguments */
686 dprintk("RPC: %5u %s: rpc_run_task failed\n",
687 task->tk_pid, __func__);
691 xprt->stat.bind_count++;
695 bailout_release_client:
696 rpc_release_client(rpcb_clnt);
698 rpcb_wake_rpcbind_waiters(xprt, status);
699 task->tk_status = status;
701 EXPORT_SYMBOL_GPL(rpcb_getport_async);
704 * Rpcbind child task calls this callback via tk_exit.
706 static void rpcb_getport_done(struct rpc_task *child, void *data)
708 struct rpcbind_args *map = data;
709 struct rpc_xprt *xprt = map->r_xprt;
710 int status = child->tk_status;
712 /* Garbage reply: retry with a lesser rpcbind version */
714 status = -EPROTONOSUPPORT;
716 /* rpcbind server doesn't support this rpcbind protocol version */
717 if (status == -EPROTONOSUPPORT)
721 /* rpcbind server not available on remote host? */
722 xprt->ops->set_port(xprt, 0);
723 } else if (map->r_port == 0) {
724 /* Requested RPC service wasn't registered on remote host */
725 xprt->ops->set_port(xprt, 0);
729 xprt->ops->set_port(xprt, map->r_port);
730 xprt_set_bound(xprt);
734 dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
735 child->tk_pid, status, map->r_port);
737 map->r_status = status;
741 * XDR functions for rpcbind
744 static int rpcb_enc_mapping(struct rpc_rqst *req, __be32 *p,
745 const struct rpcbind_args *rpcb)
747 struct rpc_task *task = req->rq_task;
748 struct xdr_stream xdr;
750 dprintk("RPC: %5u encoding PMAP_%s call (%u, %u, %d, %u)\n",
751 task->tk_pid, task->tk_msg.rpc_proc->p_name,
752 rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
754 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
756 p = xdr_reserve_space(&xdr, sizeof(__be32) * RPCB_mappingargs_sz);
757 if (unlikely(p == NULL))
760 *p++ = htonl(rpcb->r_prog);
761 *p++ = htonl(rpcb->r_vers);
762 *p++ = htonl(rpcb->r_prot);
763 *p = htonl(rpcb->r_port);
768 static int rpcb_dec_getport(struct rpc_rqst *req, __be32 *p,
769 struct rpcbind_args *rpcb)
771 struct rpc_task *task = req->rq_task;
772 struct xdr_stream xdr;
775 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
779 p = xdr_inline_decode(&xdr, sizeof(__be32));
780 if (unlikely(p == NULL))
784 dprintk("RPC: %5u PMAP_%s result: %lu\n", task->tk_pid,
785 task->tk_msg.rpc_proc->p_name, port);
786 if (unlikely(port > USHRT_MAX))
793 static int rpcb_dec_set(struct rpc_rqst *req, __be32 *p,
796 struct rpc_task *task = req->rq_task;
797 struct xdr_stream xdr;
799 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
801 p = xdr_inline_decode(&xdr, sizeof(__be32));
802 if (unlikely(p == NULL))
809 dprintk("RPC: %5u RPCB_%s call %s\n",
810 task->tk_pid, task->tk_msg.rpc_proc->p_name,
811 (*boolp ? "succeeded" : "failed"));
815 static int encode_rpcb_string(struct xdr_stream *xdr, const char *string,
821 if (unlikely(string == NULL))
823 len = strlen(string);
824 if (unlikely(len > maxstrlen))
827 p = xdr_reserve_space(xdr, sizeof(__be32) + len);
828 if (unlikely(p == NULL))
830 xdr_encode_opaque(p, string, len);
835 static int rpcb_enc_getaddr(struct rpc_rqst *req, __be32 *p,
836 const struct rpcbind_args *rpcb)
838 struct rpc_task *task = req->rq_task;
839 struct xdr_stream xdr;
841 dprintk("RPC: %5u encoding RPCB_%s call (%u, %u, '%s', '%s')\n",
842 task->tk_pid, task->tk_msg.rpc_proc->p_name,
843 rpcb->r_prog, rpcb->r_vers,
844 rpcb->r_netid, rpcb->r_addr);
846 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
848 p = xdr_reserve_space(&xdr,
849 sizeof(__be32) * (RPCB_program_sz + RPCB_version_sz));
850 if (unlikely(p == NULL))
852 *p++ = htonl(rpcb->r_prog);
853 *p = htonl(rpcb->r_vers);
855 if (encode_rpcb_string(&xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN))
857 if (encode_rpcb_string(&xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN))
859 if (encode_rpcb_string(&xdr, rpcb->r_owner, RPCB_MAXOWNERLEN))
865 static int rpcb_dec_getaddr(struct rpc_rqst *req, __be32 *p,
866 struct rpcbind_args *rpcb)
868 struct sockaddr_storage address;
869 struct sockaddr *sap = (struct sockaddr *)&address;
870 struct rpc_task *task = req->rq_task;
871 struct xdr_stream xdr;
876 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
878 p = xdr_inline_decode(&xdr, sizeof(__be32));
879 if (unlikely(p == NULL))
884 * If the returned universal address is a null string,
885 * the requested RPC service was not registered.
888 dprintk("RPC: %5u RPCB reply: program not registered\n",
893 if (unlikely(len > RPCBIND_MAXUADDRLEN))
896 p = xdr_inline_decode(&xdr, len);
897 if (unlikely(p == NULL))
899 dprintk("RPC: %5u RPCB_%s reply: %s\n", task->tk_pid,
900 task->tk_msg.rpc_proc->p_name, (char *)p);
902 if (rpc_uaddr2sockaddr((char *)p, len, sap, sizeof(address)) == 0)
904 rpcb->r_port = rpc_get_port(sap);
909 dprintk("RPC: %5u malformed RPCB_%s reply\n",
910 task->tk_pid, task->tk_msg.rpc_proc->p_name);
915 * Not all rpcbind procedures described in RFC 1833 are implemented
916 * since the Linux kernel RPC code requires only these.
919 static struct rpc_procinfo rpcb_procedures2[] = {
921 .p_proc = RPCBPROC_SET,
922 .p_encode = (kxdrproc_t)rpcb_enc_mapping,
923 .p_decode = (kxdrproc_t)rpcb_dec_set,
924 .p_arglen = RPCB_mappingargs_sz,
925 .p_replen = RPCB_setres_sz,
926 .p_statidx = RPCBPROC_SET,
931 .p_proc = RPCBPROC_UNSET,
932 .p_encode = (kxdrproc_t)rpcb_enc_mapping,
933 .p_decode = (kxdrproc_t)rpcb_dec_set,
934 .p_arglen = RPCB_mappingargs_sz,
935 .p_replen = RPCB_setres_sz,
936 .p_statidx = RPCBPROC_UNSET,
940 [RPCBPROC_GETPORT] = {
941 .p_proc = RPCBPROC_GETPORT,
942 .p_encode = (kxdrproc_t)rpcb_enc_mapping,
943 .p_decode = (kxdrproc_t)rpcb_dec_getport,
944 .p_arglen = RPCB_mappingargs_sz,
945 .p_replen = RPCB_getportres_sz,
946 .p_statidx = RPCBPROC_GETPORT,
952 static struct rpc_procinfo rpcb_procedures3[] = {
954 .p_proc = RPCBPROC_SET,
955 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
956 .p_decode = (kxdrproc_t)rpcb_dec_set,
957 .p_arglen = RPCB_getaddrargs_sz,
958 .p_replen = RPCB_setres_sz,
959 .p_statidx = RPCBPROC_SET,
964 .p_proc = RPCBPROC_UNSET,
965 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
966 .p_decode = (kxdrproc_t)rpcb_dec_set,
967 .p_arglen = RPCB_getaddrargs_sz,
968 .p_replen = RPCB_setres_sz,
969 .p_statidx = RPCBPROC_UNSET,
973 [RPCBPROC_GETADDR] = {
974 .p_proc = RPCBPROC_GETADDR,
975 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
976 .p_decode = (kxdrproc_t)rpcb_dec_getaddr,
977 .p_arglen = RPCB_getaddrargs_sz,
978 .p_replen = RPCB_getaddrres_sz,
979 .p_statidx = RPCBPROC_GETADDR,
985 static struct rpc_procinfo rpcb_procedures4[] = {
987 .p_proc = RPCBPROC_SET,
988 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
989 .p_decode = (kxdrproc_t)rpcb_dec_set,
990 .p_arglen = RPCB_getaddrargs_sz,
991 .p_replen = RPCB_setres_sz,
992 .p_statidx = RPCBPROC_SET,
997 .p_proc = RPCBPROC_UNSET,
998 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
999 .p_decode = (kxdrproc_t)rpcb_dec_set,
1000 .p_arglen = RPCB_getaddrargs_sz,
1001 .p_replen = RPCB_setres_sz,
1002 .p_statidx = RPCBPROC_UNSET,
1006 [RPCBPROC_GETADDR] = {
1007 .p_proc = RPCBPROC_GETADDR,
1008 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
1009 .p_decode = (kxdrproc_t)rpcb_dec_getaddr,
1010 .p_arglen = RPCB_getaddrargs_sz,
1011 .p_replen = RPCB_getaddrres_sz,
1012 .p_statidx = RPCBPROC_GETADDR,
1014 .p_name = "GETADDR",
1018 static struct rpcb_info rpcb_next_version[] = {
1020 .rpc_vers = RPCBVERS_2,
1021 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
1028 static struct rpcb_info rpcb_next_version6[] = {
1030 .rpc_vers = RPCBVERS_4,
1031 .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR],
1034 .rpc_vers = RPCBVERS_3,
1035 .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR],
1042 static struct rpc_version rpcb_version2 = {
1043 .number = RPCBVERS_2,
1044 .nrprocs = RPCB_HIGHPROC_2,
1045 .procs = rpcb_procedures2
1048 static struct rpc_version rpcb_version3 = {
1049 .number = RPCBVERS_3,
1050 .nrprocs = RPCB_HIGHPROC_3,
1051 .procs = rpcb_procedures3
1054 static struct rpc_version rpcb_version4 = {
1055 .number = RPCBVERS_4,
1056 .nrprocs = RPCB_HIGHPROC_4,
1057 .procs = rpcb_procedures4
1060 static struct rpc_version *rpcb_version[] = {
1068 static struct rpc_stat rpcb_stats;
1070 static struct rpc_program rpcb_program = {
1072 .number = RPCBIND_PROGRAM,
1073 .nrvers = ARRAY_SIZE(rpcb_version),
1074 .version = rpcb_version,
1075 .stats = &rpcb_stats,
1079 * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister
1082 void cleanup_rpcb_clnt(void)
1084 if (rpcb_local_clnt4)
1085 rpc_shutdown_client(rpcb_local_clnt4);
1086 if (rpcb_local_clnt)
1087 rpc_shutdown_client(rpcb_local_clnt);