blob: 121105355f60e4a90dcb9906e878ea255499358d [file] [log] [blame]
Chuck Levera5090502007-03-29 16:48:04 -04001/*
2 * In-kernel rpcbind client supporting versions 2, 3, and 4 of the rpcbind
3 * protocol
4 *
5 * Based on RFC 1833: "Binding Protocols for ONC RPC Version 2" and
6 * RFC 3530: "Network File System (NFS) version 4 Protocol"
7 *
8 * Original: Gilles Quillard, Bull Open Source, 2005 <gilles.quillard@bull.net>
9 * Updated: Chuck Lever, Oracle Corporation, 2007 <chuck.lever@oracle.com>
10 *
11 * Descended from net/sunrpc/pmap_clnt.c,
12 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
13 */
14
Chuck Levercce63cd2007-07-01 12:13:12 -040015#include <linux/module.h>
16
Chuck Levera5090502007-03-29 16:48:04 -040017#include <linux/types.h>
18#include <linux/socket.h>
Chuck Leverd5b64432007-08-06 11:57:18 -040019#include <linux/in.h>
20#include <linux/in6.h>
Chuck Levera5090502007-03-29 16:48:04 -040021#include <linux/kernel.h>
22#include <linux/errno.h>
Chuck Leverc5266112009-12-03 15:58:56 -050023#include <linux/mutex.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Chuck Lever9d548b92008-09-15 16:27:30 -050025#include <net/ipv6.h>
Chuck Levera5090502007-03-29 16:48:04 -040026
27#include <linux/sunrpc/clnt.h>
28#include <linux/sunrpc/sched.h>
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -040029#include <linux/sunrpc/xprtsock.h>
Chuck Levera5090502007-03-29 16:48:04 -040030
31#ifdef RPC_DEBUG
32# define RPCDBG_FACILITY RPCDBG_BIND
33#endif
34
35#define RPCBIND_PROGRAM (100000u)
36#define RPCBIND_PORT (111u)
37
Chuck Leverfc200e72008-06-25 17:24:31 -040038#define RPCBVERS_2 (2u)
39#define RPCBVERS_3 (3u)
40#define RPCBVERS_4 (4u)
41
Chuck Levera5090502007-03-29 16:48:04 -040042enum {
43 RPCBPROC_NULL,
44 RPCBPROC_SET,
45 RPCBPROC_UNSET,
46 RPCBPROC_GETPORT,
47 RPCBPROC_GETADDR = 3, /* alias for GETPORT */
48 RPCBPROC_DUMP,
49 RPCBPROC_CALLIT,
50 RPCBPROC_BCAST = 5, /* alias for CALLIT */
51 RPCBPROC_GETTIME,
52 RPCBPROC_UADDR2TADDR,
53 RPCBPROC_TADDR2UADDR,
54 RPCBPROC_GETVERSADDR,
55 RPCBPROC_INDIRECT,
56 RPCBPROC_GETADDRLIST,
57 RPCBPROC_GETSTAT,
58};
59
60#define RPCB_HIGHPROC_2 RPCBPROC_CALLIT
61#define RPCB_HIGHPROC_3 RPCBPROC_TADDR2UADDR
62#define RPCB_HIGHPROC_4 RPCBPROC_GETSTAT
63
64/*
Chuck Levera5090502007-03-29 16:48:04 -040065 * r_owner
66 *
67 * The "owner" is allowed to unset a service in the rpcbind database.
Chuck Lever126e4bc2009-03-18 20:47:14 -040068 *
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.
72 *
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.
Chuck Levera5090502007-03-29 16:48:04 -040076 */
Chuck Lever126e4bc2009-03-18 20:47:14 -040077#define RPCB_OWNER_STRING "0"
Chuck Levera5090502007-03-29 16:48:04 -040078#define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
79
Chuck Lever0b10bf52009-08-09 15:09:33 -040080/*
81 * XDR data type sizes
82 */
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)
88
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))
92
93/*
94 * XDR argument and result sizes
95 */
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 + \
100 RPCB_ownerstring_sz)
101
102#define RPCB_getportres_sz RPCB_port_sz
103#define RPCB_setres_sz RPCB_boolean_sz
104
105/*
106 * Note that RFC 1833 does not put any size restrictions on the
107 * address string returned by the remote rpcbind database.
108 */
109#define RPCB_getaddrres_sz RPCB_addr_sz
110
Chuck Levera5090502007-03-29 16:48:04 -0400111static void rpcb_getport_done(struct rpc_task *, void *);
Trond Myklebust381ba742008-07-07 12:18:53 -0400112static void rpcb_map_release(void *data);
Adrian Bunk7f4adef2007-06-13 01:03:13 +0200113static struct rpc_program rpcb_program;
Chuck Levera5090502007-03-29 16:48:04 -0400114
Chuck Leverc5266112009-12-03 15:58:56 -0500115static struct rpc_clnt * rpcb_local_clnt;
116static struct rpc_clnt * rpcb_local_clnt4;
117
Chuck Levera5090502007-03-29 16:48:04 -0400118struct rpcbind_args {
119 struct rpc_xprt * r_xprt;
120
121 u32 r_prog;
122 u32 r_vers;
123 u32 r_prot;
124 unsigned short r_port;
Trond Myklebust86d61d82008-01-07 21:16:56 -0500125 const char * r_netid;
126 const char * r_addr;
127 const char * r_owner;
Trond Myklebust381ba742008-07-07 12:18:53 -0400128
129 int r_status;
Chuck Levera5090502007-03-29 16:48:04 -0400130};
131
132static struct rpc_procinfo rpcb_procedures2[];
133static struct rpc_procinfo rpcb_procedures3[];
Chuck Leverc2e1b092008-07-14 16:03:30 -0400134static struct rpc_procinfo rpcb_procedures4[];
Chuck Levera5090502007-03-29 16:48:04 -0400135
Chuck Leverd5b64432007-08-06 11:57:18 -0400136struct rpcb_info {
Chuck Leverfc200e72008-06-25 17:24:31 -0400137 u32 rpc_vers;
Chuck Levera5090502007-03-29 16:48:04 -0400138 struct rpc_procinfo * rpc_proc;
Chuck Leverd5b64432007-08-06 11:57:18 -0400139};
140
141static struct rpcb_info rpcb_next_version[];
142static struct rpcb_info rpcb_next_version6[];
Chuck Levera5090502007-03-29 16:48:04 -0400143
Chuck Levera5090502007-03-29 16:48:04 -0400144static const struct rpc_call_ops rpcb_getport_ops = {
Chuck Levera5090502007-03-29 16:48:04 -0400145 .rpc_call_done = rpcb_getport_done,
146 .rpc_release = rpcb_map_release,
147};
148
149static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
150{
151 xprt_clear_binding(xprt);
152 rpc_wake_up_status(&xprt->binding, status);
153}
154
Trond Myklebust381ba742008-07-07 12:18:53 -0400155static void rpcb_map_release(void *data)
156{
157 struct rpcbind_args *map = data;
158
159 rpcb_wake_rpcbind_waiters(map->r_xprt, map->r_status);
160 xprt_put(map->r_xprt);
Chuck Leverba809132009-08-09 15:09:35 -0400161 kfree(map->r_addr);
Trond Myklebust381ba742008-07-07 12:18:53 -0400162 kfree(map);
163}
164
Chuck Levercc5598b2008-07-14 16:03:27 -0400165static 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),
169};
170
Chuck Leverc5266112009-12-03 15:58:56 -0500171static DEFINE_MUTEX(rpcb_create_local_mutex);
172
173/*
174 * Returns zero on success, otherwise a negative errno value
175 * is returned.
176 */
177static int rpcb_create_local(void)
Chuck Levercc5598b2008-07-14 16:03:27 -0400178{
179 struct rpc_create_args args = {
Chuck Lever2a76b3b2009-12-03 15:58:56 -0500180 .protocol = XPRT_TRANSPORT_TCP,
Chuck Lever5a462112009-12-03 15:58:56 -0500181 .address = (struct sockaddr *)&rpcb_inaddr_loopback,
182 .addrsize = sizeof(rpcb_inaddr_loopback),
Chuck Levercc5598b2008-07-14 16:03:27 -0400183 .servername = "localhost",
184 .program = &rpcb_program,
Chuck Leverc5266112009-12-03 15:58:56 -0500185 .version = RPCBVERS_2,
Chuck Levercc5598b2008-07-14 16:03:27 -0400186 .authflavor = RPC_AUTH_UNIX,
187 .flags = RPC_CLNT_CREATE_NOPING,
188 };
Chuck Leverc5266112009-12-03 15:58:56 -0500189 struct rpc_clnt *clnt, *clnt4;
190 int result = 0;
Chuck Levercc5598b2008-07-14 16:03:27 -0400191
Chuck Leverc5266112009-12-03 15:58:56 -0500192 if (rpcb_local_clnt)
193 return result;
194
195 mutex_lock(&rpcb_create_local_mutex);
196 if (rpcb_local_clnt)
197 goto out;
198
199 clnt = rpc_create(&args);
200 if (IS_ERR(clnt)) {
201 dprintk("RPC: failed to create local rpcbind "
202 "client (errno %ld).\n", PTR_ERR(clnt));
203 result = -PTR_ERR(clnt);
204 goto out;
205 }
206
207 /*
208 * This results in an RPC ping. On systems running portmapper,
209 * the v4 ping will fail. Proceed anyway, but disallow rpcb
210 * v4 upcalls.
211 */
212 clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
213 if (IS_ERR(clnt4)) {
214 dprintk("RPC: failed to create local rpcbind v4 "
215 "cleint (errno %ld).\n", PTR_ERR(clnt4));
216 clnt4 = NULL;
217 }
218
219 rpcb_local_clnt = clnt;
220 rpcb_local_clnt4 = clnt4;
221
222out:
223 mutex_unlock(&rpcb_create_local_mutex);
224 return result;
Chuck Levercc5598b2008-07-14 16:03:27 -0400225}
226
Chuck Levera5090502007-03-29 16:48:04 -0400227static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
Chuck Lever423d8b02008-07-14 16:03:28 -0400228 size_t salen, int proto, u32 version)
Chuck Levera5090502007-03-29 16:48:04 -0400229{
230 struct rpc_create_args args = {
231 .protocol = proto,
232 .address = srvaddr,
Chuck Lever9f6ad262007-12-10 14:56:31 -0500233 .addrsize = salen,
Chuck Levera5090502007-03-29 16:48:04 -0400234 .servername = hostname,
235 .program = &rpcb_program,
236 .version = version,
237 .authflavor = RPC_AUTH_UNIX,
Chuck Lever423d8b02008-07-14 16:03:28 -0400238 .flags = (RPC_CLNT_CREATE_NOPING |
239 RPC_CLNT_CREATE_NONPRIVPORT),
Chuck Levera5090502007-03-29 16:48:04 -0400240 };
241
Chuck Leverd5b64432007-08-06 11:57:18 -0400242 switch (srvaddr->sa_family) {
243 case AF_INET:
244 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
245 break;
246 case AF_INET6:
247 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
248 break;
249 default:
250 return NULL;
251 }
252
Chuck Levera5090502007-03-29 16:48:04 -0400253 return rpc_create(&args);
254}
255
Chuck Leverc5266112009-12-03 15:58:56 -0500256static int rpcb_register_call(struct rpc_clnt *clnt, struct rpc_message *msg)
Chuck Leverbabe80e2008-07-14 16:03:29 -0400257{
Chuck Lever14aeb212008-08-18 19:34:00 -0400258 int result, error = 0;
Chuck Leverbabe80e2008-07-14 16:03:29 -0400259
Chuck Lever14aeb212008-08-18 19:34:00 -0400260 msg->rpc_resp = &result;
Chuck Leverbabe80e2008-07-14 16:03:29 -0400261
Chuck Lever2a76b3b2009-12-03 15:58:56 -0500262 error = rpc_call_sync(clnt, msg, RPC_TASK_SOFTCONN);
Chuck Lever14aeb212008-08-18 19:34:00 -0400263 if (error < 0) {
Chuck Lever363f7242009-03-18 20:47:44 -0400264 dprintk("RPC: failed to contact local rpcbind "
Chuck Leverbabe80e2008-07-14 16:03:29 -0400265 "server (errno %d).\n", -error);
Chuck Lever14aeb212008-08-18 19:34:00 -0400266 return error;
267 }
Chuck Leverbabe80e2008-07-14 16:03:29 -0400268
Chuck Leverdb820d62008-09-25 11:57:05 -0400269 if (!result)
Chuck Lever14aeb212008-08-18 19:34:00 -0400270 return -EACCES;
Chuck Lever14aeb212008-08-18 19:34:00 -0400271 return 0;
Chuck Leverbabe80e2008-07-14 16:03:29 -0400272}
273
Chuck Levera5090502007-03-29 16:48:04 -0400274/**
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
Chuck Leverc2e1b092008-07-14 16:03:30 -0400278 * @prot: transport protocol to register
Chuck Levera5090502007-03-29 16:48:04 -0400279 * @port: port value to register
Chuck Lever14aeb212008-08-18 19:34:00 -0400280 *
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).
Chuck Levera5090502007-03-29 16:48:04 -0400285 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400286 * 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.
Chuck Levera5090502007-03-29 16:48:04 -0400290 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400291 * 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
294 * rpcbind database.
295 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400296 * This function uses rpcbind protocol version 2 to contact the
297 * local rpcbind daemon.
298 *
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
304 * addresses).
Chuck Levera5090502007-03-29 16:48:04 -0400305 */
Chuck Lever14aeb212008-08-18 19:34:00 -0400306int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
Chuck Levera5090502007-03-29 16:48:04 -0400307{
Chuck Levera5090502007-03-29 16:48:04 -0400308 struct rpcbind_args map = {
309 .r_prog = prog,
310 .r_vers = vers,
311 .r_prot = prot,
312 .r_port = port,
313 };
314 struct rpc_message msg = {
Chuck Levera5090502007-03-29 16:48:04 -0400315 .rpc_argp = &map,
Chuck Levera5090502007-03-29 16:48:04 -0400316 };
Chuck Leverc5266112009-12-03 15:58:56 -0500317 int error;
318
319 error = rpcb_create_local();
320 if (error)
321 return error;
Chuck Levera5090502007-03-29 16:48:04 -0400322
323 dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
324 "rpcbind\n", (port ? "" : "un"),
325 prog, vers, prot, port);
326
Chuck Leverbabe80e2008-07-14 16:03:29 -0400327 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET];
328 if (port)
329 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET];
330
Chuck Leverc5266112009-12-03 15:58:56 -0500331 return rpcb_register_call(rpcb_local_clnt, &msg);
Chuck Levera5090502007-03-29 16:48:04 -0400332}
333
Chuck Leverc2e1b092008-07-14 16:03:30 -0400334/*
335 * Fill in AF_INET family-specific arguments to register
336 */
Chuck Lever1673d0d2009-03-18 20:47:21 -0400337static int rpcb_register_inet4(const struct sockaddr *sap,
338 struct rpc_message *msg)
Chuck Leverc2e1b092008-07-14 16:03:30 -0400339{
Chuck Lever3aba4552009-03-18 20:47:06 -0400340 const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400341 struct rpcbind_args *map = msg->rpc_argp;
Chuck Lever3aba4552009-03-18 20:47:06 -0400342 unsigned short port = ntohs(sin->sin_port);
Chuck Leverba809132009-08-09 15:09:35 -0400343 int result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400344
Chuck Leverba809132009-08-09 15:09:35 -0400345 map->r_addr = rpc_sockaddr2uaddr(sap);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400346
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);
351
352 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
353 if (port)
354 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
355
Chuck Leverc5266112009-12-03 15:58:56 -0500356 result = rpcb_register_call(rpcb_local_clnt4, msg);
Chuck Leverba809132009-08-09 15:09:35 -0400357 kfree(map->r_addr);
358 return result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400359}
360
361/*
362 * Fill in AF_INET6 family-specific arguments to register
363 */
Chuck Lever1673d0d2009-03-18 20:47:21 -0400364static int rpcb_register_inet6(const struct sockaddr *sap,
365 struct rpc_message *msg)
Chuck Leverc2e1b092008-07-14 16:03:30 -0400366{
Chuck Lever3aba4552009-03-18 20:47:06 -0400367 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400368 struct rpcbind_args *map = msg->rpc_argp;
Chuck Lever3aba4552009-03-18 20:47:06 -0400369 unsigned short port = ntohs(sin6->sin6_port);
Chuck Leverba809132009-08-09 15:09:35 -0400370 int result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400371
Chuck Leverba809132009-08-09 15:09:35 -0400372 map->r_addr = rpc_sockaddr2uaddr(sap);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400373
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);
378
379 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
380 if (port)
381 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
382
Chuck Leverc5266112009-12-03 15:58:56 -0500383 result = rpcb_register_call(rpcb_local_clnt4, msg);
Chuck Leverba809132009-08-09 15:09:35 -0400384 kfree(map->r_addr);
385 return result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400386}
387
Chuck Lever1673d0d2009-03-18 20:47:21 -0400388static int rpcb_unregister_all_protofamilies(struct rpc_message *msg)
389{
390 struct rpcbind_args *map = msg->rpc_argp;
391
392 dprintk("RPC: unregistering [%u, %u, '%s'] with "
393 "local rpcbind\n",
394 map->r_prog, map->r_vers, map->r_netid);
395
396 map->r_addr = "";
397 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
398
Chuck Leverc5266112009-12-03 15:58:56 -0500399 return rpcb_register_call(rpcb_local_clnt4, msg);
Chuck Lever1673d0d2009-03-18 20:47:21 -0400400}
401
Chuck Leverc2e1b092008-07-14 16:03:30 -0400402/**
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
Chuck Lever14aeb212008-08-18 19:34:00 -0400408 *
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).
Chuck Leverc2e1b092008-07-14 16:03:30 -0400413 *
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.
418 *
Chuck Lever1673d0d2009-03-18 20:47:21 -0400419 * 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.
Chuck Leverc2e1b092008-07-14 16:03:30 -0400424 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400425 * 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.
429 *
430 * Supported netids include "udp" and "tcp" for UDP and TCP over
431 * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6,
432 * respectively.
433 *
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.
439 *
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.
444 */
445int rpcb_v4_register(const u32 program, const u32 version,
Chuck Lever14aeb212008-08-18 19:34:00 -0400446 const struct sockaddr *address, const char *netid)
Chuck Leverc2e1b092008-07-14 16:03:30 -0400447{
448 struct rpcbind_args map = {
449 .r_prog = program,
450 .r_vers = version,
451 .r_netid = netid,
452 .r_owner = RPCB_OWNER_STRING,
453 };
454 struct rpc_message msg = {
455 .rpc_argp = &map,
Chuck Leverc2e1b092008-07-14 16:03:30 -0400456 };
Chuck Leverc5266112009-12-03 15:58:56 -0500457 int error;
458
459 error = rpcb_create_local();
460 if (error)
461 return error;
462 if (rpcb_local_clnt4 == NULL)
463 return -EPROTONOSUPPORT;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400464
Chuck Lever1673d0d2009-03-18 20:47:21 -0400465 if (address == NULL)
466 return rpcb_unregister_all_protofamilies(&msg);
467
Chuck Leverc2e1b092008-07-14 16:03:30 -0400468 switch (address->sa_family) {
469 case AF_INET:
Chuck Lever1673d0d2009-03-18 20:47:21 -0400470 return rpcb_register_inet4(address, &msg);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400471 case AF_INET6:
Chuck Lever1673d0d2009-03-18 20:47:21 -0400472 return rpcb_register_inet6(address, &msg);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400473 }
474
475 return -EAFNOSUPPORT;
476}
477
Chuck Levera5090502007-03-29 16:48:04 -0400478/**
Chuck Levercce63cd2007-07-01 12:13:12 -0400479 * rpcb_getport_sync - obtain the port for an RPC service on a given host
Chuck Levera5090502007-03-29 16:48:04 -0400480 * @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
484 *
Chuck Lever67d60212008-01-14 15:12:01 -0500485 * Return value is the requested advertised port number,
486 * or a negative errno value.
487 *
Chuck Levera5090502007-03-29 16:48:04 -0400488 * Called from outside the RPC client in a synchronous task context.
Chuck Levercce63cd2007-07-01 12:13:12 -0400489 * Uses default timeout parameters specified by underlying transport.
Chuck Levera5090502007-03-29 16:48:04 -0400490 *
Chuck Lever67d60212008-01-14 15:12:01 -0500491 * XXX: Needs to support IPv6
Chuck Levera5090502007-03-29 16:48:04 -0400492 */
Chuck Leverf1ec08c2008-01-14 15:11:53 -0500493int rpcb_getport_sync(struct sockaddr_in *sin, u32 prog, u32 vers, int prot)
Chuck Levera5090502007-03-29 16:48:04 -0400494{
495 struct rpcbind_args map = {
496 .r_prog = prog,
497 .r_vers = vers,
498 .r_prot = prot,
499 .r_port = 0,
500 };
501 struct rpc_message msg = {
502 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
503 .rpc_argp = &map,
Chuck Leverc0c077d2009-08-09 15:09:43 -0400504 .rpc_resp = &map,
Chuck Levera5090502007-03-29 16:48:04 -0400505 };
506 struct rpc_clnt *rpcb_clnt;
Chuck Levera5090502007-03-29 16:48:04 -0400507 int status;
508
Harvey Harrison21454aa2008-10-31 00:54:56 -0700509 dprintk("RPC: %s(%pI4, %u, %u, %d)\n",
510 __func__, &sin->sin_addr.s_addr, prog, vers, prot);
Chuck Levera5090502007-03-29 16:48:04 -0400511
Chuck Leverb91e1012008-01-14 15:11:46 -0500512 rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin,
Chuck Lever423d8b02008-07-14 16:03:28 -0400513 sizeof(*sin), prot, RPCBVERS_2);
Chuck Levera5090502007-03-29 16:48:04 -0400514 if (IS_ERR(rpcb_clnt))
515 return PTR_ERR(rpcb_clnt);
516
517 status = rpc_call_sync(rpcb_clnt, &msg, 0);
Trond Myklebust90c57552007-06-09 19:49:36 -0400518 rpc_shutdown_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400519
520 if (status >= 0) {
521 if (map.r_port != 0)
522 return map.r_port;
523 status = -EACCES;
524 }
525 return status;
526}
Chuck Levercce63cd2007-07-01 12:13:12 -0400527EXPORT_SYMBOL_GPL(rpcb_getport_sync);
Chuck Levera5090502007-03-29 16:48:04 -0400528
Trond Myklebust803a9062008-07-01 15:20:55 -0400529static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc)
Trond Myklebust5138fde2007-07-14 15:40:01 -0400530{
531 struct rpc_message msg = {
Trond Myklebust803a9062008-07-01 15:20:55 -0400532 .rpc_proc = proc,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400533 .rpc_argp = map,
Chuck Leverc0c077d2009-08-09 15:09:43 -0400534 .rpc_resp = map,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400535 };
536 struct rpc_task_setup task_setup_data = {
537 .rpc_client = rpcb_clnt,
538 .rpc_message = &msg,
539 .callback_ops = &rpcb_getport_ops,
540 .callback_data = map,
Chuck Lever012da152009-12-03 15:58:56 -0500541 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400542 };
543
544 return rpc_run_task(&task_setup_data);
545}
546
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400547/*
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
552 * autobind flag set.
553 */
554static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt)
555{
556 struct rpc_clnt *parent = clnt->cl_parent;
557
558 while (parent != clnt) {
559 if (parent->cl_xprt != clnt->cl_xprt)
560 break;
561 if (clnt->cl_autobind)
562 break;
563 clnt = parent;
564 parent = parent->cl_parent;
565 }
566 return clnt;
567}
568
Chuck Levera5090502007-03-29 16:48:04 -0400569/**
Chuck Lever45160d62007-07-01 12:13:17 -0400570 * rpcb_getport_async - obtain the port for a given RPC service on a given host
Chuck Levera5090502007-03-29 16:48:04 -0400571 * @task: task that is waiting for portmapper request
572 *
573 * This one can be called for an ongoing RPC request, and can be used in
574 * an async (rpciod) context.
575 */
Chuck Lever45160d62007-07-01 12:13:17 -0400576void rpcb_getport_async(struct rpc_task *task)
Chuck Levera5090502007-03-29 16:48:04 -0400577{
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400578 struct rpc_clnt *clnt;
Trond Myklebust803a9062008-07-01 15:20:55 -0400579 struct rpc_procinfo *proc;
Chuck Lever0a48f5d2007-12-10 14:56:38 -0500580 u32 bind_version;
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400581 struct rpc_xprt *xprt;
Chuck Levera5090502007-03-29 16:48:04 -0400582 struct rpc_clnt *rpcb_clnt;
583 static struct rpcbind_args *map;
584 struct rpc_task *child;
Chuck Lever9f6ad262007-12-10 14:56:31 -0500585 struct sockaddr_storage addr;
586 struct sockaddr *sap = (struct sockaddr *)&addr;
587 size_t salen;
Chuck Levera5090502007-03-29 16:48:04 -0400588 int status;
589
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400590 clnt = rpcb_find_transport_owner(task->tk_client);
591 xprt = clnt->cl_xprt;
592
Chuck Lever45160d62007-07-01 12:13:17 -0400593 dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800594 task->tk_pid, __func__,
Chuck Lever45160d62007-07-01 12:13:17 -0400595 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
Chuck Levera5090502007-03-29 16:48:04 -0400596
Trond Myklebust381ba742008-07-07 12:18:53 -0400597 /* 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);
600
Chuck Levera5090502007-03-29 16:48:04 -0400601 if (xprt_test_and_set_binding(xprt)) {
Chuck Lever45160d62007-07-01 12:13:17 -0400602 dprintk("RPC: %5u %s: waiting for another binder\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800603 task->tk_pid, __func__);
Trond Myklebust381ba742008-07-07 12:18:53 -0400604 return;
Chuck Levera5090502007-03-29 16:48:04 -0400605 }
606
Chuck Levera5090502007-03-29 16:48:04 -0400607 /* Someone else may have bound if we slept */
608 if (xprt_bound(xprt)) {
609 status = 0;
Chuck Lever45160d62007-07-01 12:13:17 -0400610 dprintk("RPC: %5u %s: already bound\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800611 task->tk_pid, __func__);
Chuck Levera5090502007-03-29 16:48:04 -0400612 goto bailout_nofree;
613 }
614
Chuck Leverba809132009-08-09 15:09:35 -0400615 /* Parent transport's destination address */
Chuck Lever9f6ad262007-12-10 14:56:31 -0500616 salen = rpc_peeraddr(clnt, sap, sizeof(addr));
Chuck Leverd5b64432007-08-06 11:57:18 -0400617
618 /* Don't ever use rpcbind v2 for AF_INET6 requests */
Chuck Lever9f6ad262007-12-10 14:56:31 -0500619 switch (sap->sa_family) {
Chuck Leverd5b64432007-08-06 11:57:18 -0400620 case AF_INET:
Trond Myklebust803a9062008-07-01 15:20:55 -0400621 proc = rpcb_next_version[xprt->bind_index].rpc_proc;
622 bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
Chuck Leverd5b64432007-08-06 11:57:18 -0400623 break;
624 case AF_INET6:
Trond Myklebust803a9062008-07-01 15:20:55 -0400625 proc = rpcb_next_version6[xprt->bind_index].rpc_proc;
626 bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers;
Chuck Leverd5b64432007-08-06 11:57:18 -0400627 break;
628 default:
629 status = -EAFNOSUPPORT;
630 dprintk("RPC: %5u %s: bad address family\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800631 task->tk_pid, __func__);
Chuck Leverd5b64432007-08-06 11:57:18 -0400632 goto bailout_nofree;
633 }
Trond Myklebust803a9062008-07-01 15:20:55 -0400634 if (proc == NULL) {
Chuck Levera5090502007-03-29 16:48:04 -0400635 xprt->bind_index = 0;
Chuck Lever906462a2007-09-11 18:00:47 -0400636 status = -EPFNOSUPPORT;
Chuck Lever45160d62007-07-01 12:13:17 -0400637 dprintk("RPC: %5u %s: no more getport versions available\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800638 task->tk_pid, __func__);
Chuck Levera5090502007-03-29 16:48:04 -0400639 goto bailout_nofree;
640 }
Chuck Levera5090502007-03-29 16:48:04 -0400641
Chuck Lever45160d62007-07-01 12:13:17 -0400642 dprintk("RPC: %5u %s: trying rpcbind version %u\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800643 task->tk_pid, __func__, bind_version);
Chuck Levera5090502007-03-29 16:48:04 -0400644
Chuck Lever9f6ad262007-12-10 14:56:31 -0500645 rpcb_clnt = rpcb_create(clnt->cl_server, sap, salen, xprt->prot,
Chuck Lever423d8b02008-07-14 16:03:28 -0400646 bind_version);
Chuck Lever143b6c42007-08-16 16:03:31 -0400647 if (IS_ERR(rpcb_clnt)) {
648 status = PTR_ERR(rpcb_clnt);
649 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800650 task->tk_pid, __func__, PTR_ERR(rpcb_clnt));
Chuck Lever143b6c42007-08-16 16:03:31 -0400651 goto bailout_nofree;
652 }
653
Chuck Levera5090502007-03-29 16:48:04 -0400654 map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
655 if (!map) {
656 status = -ENOMEM;
Chuck Lever45160d62007-07-01 12:13:17 -0400657 dprintk("RPC: %5u %s: no memory available\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800658 task->tk_pid, __func__);
Trond Myklebust96165e22008-10-03 16:48:40 -0400659 goto bailout_release_client;
Chuck Levera5090502007-03-29 16:48:04 -0400660 }
661 map->r_prog = clnt->cl_prog;
662 map->r_vers = clnt->cl_vers;
663 map->r_prot = xprt->prot;
664 map->r_port = 0;
665 map->r_xprt = xprt_get(xprt);
Trond Myklebust381ba742008-07-07 12:18:53 -0400666 map->r_status = -EIO;
Chuck Levera5090502007-03-29 16:48:04 -0400667
Chuck Leverba809132009-08-09 15:09:35 -0400668 switch (bind_version) {
669 case RPCBVERS_4:
670 case RPCBVERS_3:
671 map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
672 map->r_addr = rpc_sockaddr2uaddr(sap);
673 map->r_owner = "";
674 break;
675 case RPCBVERS_2:
676 map->r_addr = NULL;
677 break;
678 default:
679 BUG();
680 }
681
Trond Myklebust803a9062008-07-01 15:20:55 -0400682 child = rpcb_call_async(rpcb_clnt, map, proc);
Trond Myklebust4c402b42007-06-14 16:40:32 -0400683 rpc_release_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400684 if (IS_ERR(child)) {
Trond Myklebust0d3a34b2008-07-07 12:18:52 -0400685 /* rpcb_map_release() has freed the arguments */
Chuck Lever45160d62007-07-01 12:13:17 -0400686 dprintk("RPC: %5u %s: rpc_run_task failed\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800687 task->tk_pid, __func__);
Trond Myklebust381ba742008-07-07 12:18:53 -0400688 return;
Chuck Levera5090502007-03-29 16:48:04 -0400689 }
Chuck Levera5090502007-03-29 16:48:04 -0400690
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400691 xprt->stat.bind_count++;
692 rpc_put_task(child);
Chuck Levera5090502007-03-29 16:48:04 -0400693 return;
694
Trond Myklebust96165e22008-10-03 16:48:40 -0400695bailout_release_client:
696 rpc_release_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400697bailout_nofree:
698 rpcb_wake_rpcbind_waiters(xprt, status);
Chuck Levera5090502007-03-29 16:48:04 -0400699 task->tk_status = status;
700}
\"Talpey, Thomas\12444802007-09-10 13:45:36 -0400701EXPORT_SYMBOL_GPL(rpcb_getport_async);
Chuck Levera5090502007-03-29 16:48:04 -0400702
703/*
704 * Rpcbind child task calls this callback via tk_exit.
705 */
706static void rpcb_getport_done(struct rpc_task *child, void *data)
707{
708 struct rpcbind_args *map = data;
709 struct rpc_xprt *xprt = map->r_xprt;
710 int status = child->tk_status;
711
Chuck Lever4784cb52007-09-11 18:00:36 -0400712 /* Garbage reply: retry with a lesser rpcbind version */
713 if (status == -EIO)
714 status = -EPROTONOSUPPORT;
715
Chuck Levera5090502007-03-29 16:48:04 -0400716 /* rpcbind server doesn't support this rpcbind protocol version */
717 if (status == -EPROTONOSUPPORT)
718 xprt->bind_index++;
719
720 if (status < 0) {
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);
726 status = -EACCES;
727 } else {
728 /* Succeeded */
729 xprt->ops->set_port(xprt, map->r_port);
730 xprt_set_bound(xprt);
731 status = 0;
732 }
733
734 dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
735 child->tk_pid, status, map->r_port);
736
Trond Myklebust381ba742008-07-07 12:18:53 -0400737 map->r_status = status;
Chuck Levera5090502007-03-29 16:48:04 -0400738}
739
Chuck Lever166b88d2008-07-14 16:03:26 -0400740/*
741 * XDR functions for rpcbind
742 */
743
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400744static int rpcb_enc_mapping(struct rpc_rqst *req, __be32 *p,
745 const struct rpcbind_args *rpcb)
746{
747 struct rpc_task *task = req->rq_task;
748 struct xdr_stream xdr;
749
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);
753
754 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
755
756 p = xdr_reserve_space(&xdr, sizeof(__be32) * RPCB_mappingargs_sz);
757 if (unlikely(p == NULL))
758 return -EIO;
759
760 *p++ = htonl(rpcb->r_prog);
761 *p++ = htonl(rpcb->r_vers);
762 *p++ = htonl(rpcb->r_prot);
763 *p = htonl(rpcb->r_port);
764
765 return 0;
766}
767
Chuck Leverc0c077d2009-08-09 15:09:43 -0400768static int rpcb_dec_getport(struct rpc_rqst *req, __be32 *p,
769 struct rpcbind_args *rpcb)
770{
771 struct rpc_task *task = req->rq_task;
772 struct xdr_stream xdr;
773 unsigned long port;
774
775 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
776
777 rpcb->r_port = 0;
778
779 p = xdr_inline_decode(&xdr, sizeof(__be32));
780 if (unlikely(p == NULL))
781 return -EIO;
782
783 port = ntohl(*p);
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 > USHORT_MAX))
787 return -EIO;
788
789 rpcb->r_port = port;
790 return 0;
791}
792
Chuck Lever7ed0ff92009-08-09 15:09:42 -0400793static int rpcb_dec_set(struct rpc_rqst *req, __be32 *p,
794 unsigned int *boolp)
795{
796 struct rpc_task *task = req->rq_task;
797 struct xdr_stream xdr;
798
799 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
800
801 p = xdr_inline_decode(&xdr, sizeof(__be32));
802 if (unlikely(p == NULL))
803 return -EIO;
804
805 *boolp = 0;
806 if (*p)
807 *boolp = 1;
808
809 dprintk("RPC: %5u RPCB_%s call %s\n",
810 task->tk_pid, task->tk_msg.rpc_proc->p_name,
811 (*boolp ? "succeeded" : "failed"));
812 return 0;
813}
814
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400815static int encode_rpcb_string(struct xdr_stream *xdr, const char *string,
816 const u32 maxstrlen)
817{
818 u32 len;
819 __be32 *p;
820
821 if (unlikely(string == NULL))
822 return -EIO;
823 len = strlen(string);
824 if (unlikely(len > maxstrlen))
825 return -EIO;
826
827 p = xdr_reserve_space(xdr, sizeof(__be32) + len);
828 if (unlikely(p == NULL))
829 return -EIO;
830 xdr_encode_opaque(p, string, len);
831
832 return 0;
833}
834
835static int rpcb_enc_getaddr(struct rpc_rqst *req, __be32 *p,
836 const struct rpcbind_args *rpcb)
837{
838 struct rpc_task *task = req->rq_task;
839 struct xdr_stream xdr;
840
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);
845
846 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
847
848 p = xdr_reserve_space(&xdr,
849 sizeof(__be32) * (RPCB_program_sz + RPCB_version_sz));
850 if (unlikely(p == NULL))
851 return -EIO;
852 *p++ = htonl(rpcb->r_prog);
853 *p = htonl(rpcb->r_vers);
854
855 if (encode_rpcb_string(&xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN))
856 return -EIO;
857 if (encode_rpcb_string(&xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN))
858 return -EIO;
859 if (encode_rpcb_string(&xdr, rpcb->r_owner, RPCB_MAXOWNERLEN))
860 return -EIO;
861
862 return 0;
863}
864
Chuck Leverc0c077d2009-08-09 15:09:43 -0400865static int rpcb_dec_getaddr(struct rpc_rqst *req, __be32 *p,
866 struct rpcbind_args *rpcb)
867{
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;
872 u32 len;
873
874 rpcb->r_port = 0;
875
876 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
877
878 p = xdr_inline_decode(&xdr, sizeof(__be32));
879 if (unlikely(p == NULL))
880 goto out_fail;
881 len = ntohl(*p);
882
883 /*
884 * If the returned universal address is a null string,
885 * the requested RPC service was not registered.
886 */
887 if (len == 0) {
888 dprintk("RPC: %5u RPCB reply: program not registered\n",
889 task->tk_pid);
890 return 0;
891 }
892
893 if (unlikely(len > RPCBIND_MAXUADDRLEN))
894 goto out_fail;
895
896 p = xdr_inline_decode(&xdr, len);
897 if (unlikely(p == NULL))
898 goto out_fail;
899 dprintk("RPC: %5u RPCB_%s reply: %s\n", task->tk_pid,
900 task->tk_msg.rpc_proc->p_name, (char *)p);
901
902 if (rpc_uaddr2sockaddr((char *)p, len, sap, sizeof(address)) == 0)
903 goto out_fail;
904 rpcb->r_port = rpc_get_port(sap);
905
906 return 0;
907
908out_fail:
909 dprintk("RPC: %5u malformed RPCB_%s reply\n",
910 task->tk_pid, task->tk_msg.rpc_proc->p_name);
911 return -EIO;
912}
913
Chuck Levera5090502007-03-29 16:48:04 -0400914/*
915 * Not all rpcbind procedures described in RFC 1833 are implemented
916 * since the Linux kernel RPC code requires only these.
917 */
Chuck Leverf8b761e2009-08-09 15:09:44 -0400918
Chuck Levera5090502007-03-29 16:48:04 -0400919static struct rpc_procinfo rpcb_procedures2[] = {
Chuck Leverf8b761e2009-08-09 15:09:44 -0400920 [RPCBPROC_SET] = {
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,
927 .p_timer = 0,
928 .p_name = "SET",
929 },
930 [RPCBPROC_UNSET] = {
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,
937 .p_timer = 0,
938 .p_name = "UNSET",
939 },
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,
947 .p_timer = 0,
948 .p_name = "GETPORT",
949 },
Chuck Levera5090502007-03-29 16:48:04 -0400950};
951
952static struct rpc_procinfo rpcb_procedures3[] = {
Chuck Leverf8b761e2009-08-09 15:09:44 -0400953 [RPCBPROC_SET] = {
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,
960 .p_timer = 0,
961 .p_name = "SET",
962 },
963 [RPCBPROC_UNSET] = {
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,
970 .p_timer = 0,
971 .p_name = "UNSET",
972 },
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,
980 .p_timer = 0,
981 .p_name = "GETADDR",
982 },
Chuck Levera5090502007-03-29 16:48:04 -0400983};
984
985static struct rpc_procinfo rpcb_procedures4[] = {
Chuck Leverf8b761e2009-08-09 15:09:44 -0400986 [RPCBPROC_SET] = {
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,
993 .p_timer = 0,
994 .p_name = "SET",
995 },
996 [RPCBPROC_UNSET] = {
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,
1003 .p_timer = 0,
1004 .p_name = "UNSET",
1005 },
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,
1013 .p_timer = 0,
1014 .p_name = "GETADDR",
1015 },
Chuck Levera5090502007-03-29 16:48:04 -04001016};
1017
1018static struct rpcb_info rpcb_next_version[] = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001019 {
1020 .rpc_vers = RPCBVERS_2,
1021 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
1022 },
1023 {
1024 .rpc_proc = NULL,
1025 },
Chuck Levera5090502007-03-29 16:48:04 -04001026};
1027
Chuck Leverd5b64432007-08-06 11:57:18 -04001028static struct rpcb_info rpcb_next_version6[] = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001029 {
1030 .rpc_vers = RPCBVERS_4,
Chuck Lever88424132008-06-25 17:24:47 -04001031 .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR],
Chuck Leverfc200e72008-06-25 17:24:31 -04001032 },
1033 {
1034 .rpc_vers = RPCBVERS_3,
1035 .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR],
1036 },
Chuck Leverfc200e72008-06-25 17:24:31 -04001037 {
1038 .rpc_proc = NULL,
1039 },
Chuck Leverd5b64432007-08-06 11:57:18 -04001040};
1041
Chuck Levera5090502007-03-29 16:48:04 -04001042static struct rpc_version rpcb_version2 = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001043 .number = RPCBVERS_2,
Chuck Levera5090502007-03-29 16:48:04 -04001044 .nrprocs = RPCB_HIGHPROC_2,
1045 .procs = rpcb_procedures2
1046};
1047
1048static struct rpc_version rpcb_version3 = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001049 .number = RPCBVERS_3,
Chuck Levera5090502007-03-29 16:48:04 -04001050 .nrprocs = RPCB_HIGHPROC_3,
1051 .procs = rpcb_procedures3
1052};
1053
1054static struct rpc_version rpcb_version4 = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001055 .number = RPCBVERS_4,
Chuck Levera5090502007-03-29 16:48:04 -04001056 .nrprocs = RPCB_HIGHPROC_4,
1057 .procs = rpcb_procedures4
1058};
1059
1060static struct rpc_version *rpcb_version[] = {
1061 NULL,
1062 NULL,
1063 &rpcb_version2,
1064 &rpcb_version3,
1065 &rpcb_version4
1066};
1067
1068static struct rpc_stat rpcb_stats;
1069
Adrian Bunk7f4adef2007-06-13 01:03:13 +02001070static struct rpc_program rpcb_program = {
Chuck Levera5090502007-03-29 16:48:04 -04001071 .name = "rpcbind",
1072 .number = RPCBIND_PROGRAM,
1073 .nrvers = ARRAY_SIZE(rpcb_version),
1074 .version = rpcb_version,
1075 .stats = &rpcb_stats,
1076};
Chuck Leverc5266112009-12-03 15:58:56 -05001077
1078/**
1079 * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister
1080 *
1081 */
1082void cleanup_rpcb_clnt(void)
1083{
1084 if (rpcb_local_clnt4)
1085 rpc_shutdown_client(rpcb_local_clnt4);
1086 if (rpcb_local_clnt)
1087 rpc_shutdown_client(rpcb_local_clnt);
1088}