blob: 05202012bcfca1f205df6284a622c271d95069ac [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 Lever7402ab192011-05-09 15:22:55 -040019#include <linux/un.h>
Chuck Leverd5b64432007-08-06 11:57:18 -040020#include <linux/in.h>
21#include <linux/in6.h>
Chuck Levera5090502007-03-29 16:48:04 -040022#include <linux/kernel.h>
23#include <linux/errno.h>
Chuck Leverc5266112009-12-03 15:58:56 -050024#include <linux/mutex.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Chuck Lever9d548b92008-09-15 16:27:30 -050026#include <net/ipv6.h>
Chuck Levera5090502007-03-29 16:48:04 -040027
28#include <linux/sunrpc/clnt.h>
Jeff Layton59766872013-02-04 12:50:00 -050029#include <linux/sunrpc/addr.h>
Chuck Levera5090502007-03-29 16:48:04 -040030#include <linux/sunrpc/sched.h>
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -040031#include <linux/sunrpc/xprtsock.h>
Chuck Levera5090502007-03-29 16:48:04 -040032
Stanislav Kinsburskydff02d42012-01-13 12:52:10 +040033#include "netns.h"
34
Jeff Laytonf895b252014-11-17 16:58:04 -050035#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
Chuck Levera5090502007-03-29 16:48:04 -040036# define RPCDBG_FACILITY RPCDBG_BIND
37#endif
38
Chuck Lever7402ab192011-05-09 15:22:55 -040039#define RPCBIND_SOCK_PATHNAME "/var/run/rpcbind.sock"
40
Chuck Levera5090502007-03-29 16:48:04 -040041#define RPCBIND_PROGRAM (100000u)
42#define RPCBIND_PORT (111u)
43
Chuck Leverfc200e72008-06-25 17:24:31 -040044#define RPCBVERS_2 (2u)
45#define RPCBVERS_3 (3u)
46#define RPCBVERS_4 (4u)
47
Chuck Levera5090502007-03-29 16:48:04 -040048enum {
49 RPCBPROC_NULL,
50 RPCBPROC_SET,
51 RPCBPROC_UNSET,
52 RPCBPROC_GETPORT,
53 RPCBPROC_GETADDR = 3, /* alias for GETPORT */
54 RPCBPROC_DUMP,
55 RPCBPROC_CALLIT,
56 RPCBPROC_BCAST = 5, /* alias for CALLIT */
57 RPCBPROC_GETTIME,
58 RPCBPROC_UADDR2TADDR,
59 RPCBPROC_TADDR2UADDR,
60 RPCBPROC_GETVERSADDR,
61 RPCBPROC_INDIRECT,
62 RPCBPROC_GETADDRLIST,
63 RPCBPROC_GETSTAT,
64};
65
Chuck Levera5090502007-03-29 16:48:04 -040066/*
Chuck Levera5090502007-03-29 16:48:04 -040067 * r_owner
68 *
69 * The "owner" is allowed to unset a service in the rpcbind database.
Chuck Lever126e4bc2009-03-18 20:47:14 -040070 *
71 * For AF_LOCAL SET/UNSET requests, rpcbind treats this string as a
72 * UID which it maps to a local user name via a password lookup.
73 * In all other cases it is ignored.
74 *
75 * For SET/UNSET requests, user space provides a value, even for
76 * network requests, and GETADDR uses an empty string. We follow
77 * those precedents here.
Chuck Levera5090502007-03-29 16:48:04 -040078 */
Chuck Lever126e4bc2009-03-18 20:47:14 -040079#define RPCB_OWNER_STRING "0"
Chuck Levera5090502007-03-29 16:48:04 -040080#define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
81
Chuck Lever0b10bf52009-08-09 15:09:33 -040082/*
83 * XDR data type sizes
84 */
85#define RPCB_program_sz (1)
86#define RPCB_version_sz (1)
87#define RPCB_protocol_sz (1)
88#define RPCB_port_sz (1)
89#define RPCB_boolean_sz (1)
90
91#define RPCB_netid_sz (1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
92#define RPCB_addr_sz (1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
93#define RPCB_ownerstring_sz (1 + XDR_QUADLEN(RPCB_MAXOWNERLEN))
94
95/*
96 * XDR argument and result sizes
97 */
98#define RPCB_mappingargs_sz (RPCB_program_sz + RPCB_version_sz + \
99 RPCB_protocol_sz + RPCB_port_sz)
100#define RPCB_getaddrargs_sz (RPCB_program_sz + RPCB_version_sz + \
101 RPCB_netid_sz + RPCB_addr_sz + \
102 RPCB_ownerstring_sz)
103
104#define RPCB_getportres_sz RPCB_port_sz
105#define RPCB_setres_sz RPCB_boolean_sz
106
107/*
108 * Note that RFC 1833 does not put any size restrictions on the
109 * address string returned by the remote rpcbind database.
110 */
111#define RPCB_getaddrres_sz RPCB_addr_sz
112
Chuck Levera5090502007-03-29 16:48:04 -0400113static void rpcb_getport_done(struct rpc_task *, void *);
Trond Myklebust381ba742008-07-07 12:18:53 -0400114static void rpcb_map_release(void *data);
Trond Myklebusta613fa12012-01-20 13:53:56 -0500115static const struct rpc_program rpcb_program;
Chuck Levera5090502007-03-29 16:48:04 -0400116
117struct rpcbind_args {
118 struct rpc_xprt * r_xprt;
119
120 u32 r_prog;
121 u32 r_vers;
122 u32 r_prot;
123 unsigned short r_port;
Trond Myklebust86d61d82008-01-07 21:16:56 -0500124 const char * r_netid;
125 const char * r_addr;
126 const char * r_owner;
Trond Myklebust381ba742008-07-07 12:18:53 -0400127
128 int r_status;
Chuck Levera5090502007-03-29 16:48:04 -0400129};
130
131static struct rpc_procinfo rpcb_procedures2[];
132static struct rpc_procinfo rpcb_procedures3[];
Chuck Leverc2e1b092008-07-14 16:03:30 -0400133static struct rpc_procinfo rpcb_procedures4[];
Chuck Levera5090502007-03-29 16:48:04 -0400134
Chuck Leverd5b64432007-08-06 11:57:18 -0400135struct rpcb_info {
Chuck Leverfc200e72008-06-25 17:24:31 -0400136 u32 rpc_vers;
Chuck Levera5090502007-03-29 16:48:04 -0400137 struct rpc_procinfo * rpc_proc;
Chuck Leverd5b64432007-08-06 11:57:18 -0400138};
139
Trond Myklebusta613fa12012-01-20 13:53:56 -0500140static const struct rpcb_info rpcb_next_version[];
141static const struct rpcb_info rpcb_next_version6[];
Chuck Levera5090502007-03-29 16:48:04 -0400142
Chuck Levera5090502007-03-29 16:48:04 -0400143static const struct rpc_call_ops rpcb_getport_ops = {
Chuck Levera5090502007-03-29 16:48:04 -0400144 .rpc_call_done = rpcb_getport_done,
145 .rpc_release = rpcb_map_release,
146};
147
148static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
149{
150 xprt_clear_binding(xprt);
151 rpc_wake_up_status(&xprt->binding, status);
152}
153
Trond Myklebust381ba742008-07-07 12:18:53 -0400154static void rpcb_map_release(void *data)
155{
156 struct rpcbind_args *map = data;
157
158 rpcb_wake_rpcbind_waiters(map->r_xprt, map->r_status);
159 xprt_put(map->r_xprt);
Chuck Leverba809132009-08-09 15:09:35 -0400160 kfree(map->r_addr);
Trond Myklebust381ba742008-07-07 12:18:53 -0400161 kfree(map);
162}
163
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400164static int rpcb_get_local(struct net *net)
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300165{
166 int cnt;
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400167 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300168
Stanislav Kinsburskydff02d42012-01-13 12:52:10 +0400169 spin_lock(&sn->rpcb_clnt_lock);
170 if (sn->rpcb_users)
171 sn->rpcb_users++;
172 cnt = sn->rpcb_users;
173 spin_unlock(&sn->rpcb_clnt_lock);
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300174
175 return cnt;
176}
177
Stanislav Kinsburskyf7a30c12012-01-13 12:52:51 +0400178void rpcb_put_local(struct net *net)
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300179{
Stanislav Kinsburskyf7a30c12012-01-13 12:52:51 +0400180 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
Stanislav Kinsburskydff02d42012-01-13 12:52:10 +0400181 struct rpc_clnt *clnt = sn->rpcb_local_clnt;
182 struct rpc_clnt *clnt4 = sn->rpcb_local_clnt4;
Stanislav Kinsbursky9793f7c2012-05-02 16:08:38 +0400183 int shutdown = 0;
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300184
Stanislav Kinsburskydff02d42012-01-13 12:52:10 +0400185 spin_lock(&sn->rpcb_clnt_lock);
Stanislav Kinsbursky9793f7c2012-05-02 16:08:38 +0400186 if (sn->rpcb_users) {
187 if (--sn->rpcb_users == 0) {
188 sn->rpcb_local_clnt = NULL;
189 sn->rpcb_local_clnt4 = NULL;
190 }
191 shutdown = !sn->rpcb_users;
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300192 }
Stanislav Kinsburskydff02d42012-01-13 12:52:10 +0400193 spin_unlock(&sn->rpcb_clnt_lock);
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300194
195 if (shutdown) {
196 /*
197 * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister
198 */
199 if (clnt4)
200 rpc_shutdown_client(clnt4);
201 if (clnt)
202 rpc_shutdown_client(clnt);
203 }
204}
205
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400206static void rpcb_set_local(struct net *net, struct rpc_clnt *clnt,
Trond Myklebust786615b2013-08-05 16:04:47 -0400207 struct rpc_clnt *clnt4,
208 bool is_af_local)
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300209{
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400210 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
Stanislav Kinsburskydff02d42012-01-13 12:52:10 +0400211
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300212 /* Protected by rpcb_create_local_mutex */
Stanislav Kinsburskydff02d42012-01-13 12:52:10 +0400213 sn->rpcb_local_clnt = clnt;
214 sn->rpcb_local_clnt4 = clnt4;
Trond Myklebust786615b2013-08-05 16:04:47 -0400215 sn->rpcb_is_af_local = is_af_local ? 1 : 0;
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300216 smp_wmb();
Stanislav Kinsburskydff02d42012-01-13 12:52:10 +0400217 sn->rpcb_users = 1;
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300218 dprintk("RPC: created new rpcb local clients (rpcb_local_clnt: "
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400219 "%p, rpcb_local_clnt4: %p) for net %p%s\n",
220 sn->rpcb_local_clnt, sn->rpcb_local_clnt4,
221 net, (net == &init_net) ? " (init_net)" : "");
Stanislav Kinsbursky914edb12011-10-25 14:16:36 +0300222}
223
Chuck Lever7402ab192011-05-09 15:22:55 -0400224/*
225 * Returns zero on success, otherwise a negative errno value
226 * is returned.
227 */
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400228static int rpcb_create_local_unix(struct net *net)
Chuck Lever7402ab192011-05-09 15:22:55 -0400229{
230 static const struct sockaddr_un rpcb_localaddr_rpcbind = {
231 .sun_family = AF_LOCAL,
232 .sun_path = RPCBIND_SOCK_PATHNAME,
233 };
234 struct rpc_create_args args = {
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400235 .net = net,
Chuck Lever7402ab192011-05-09 15:22:55 -0400236 .protocol = XPRT_TRANSPORT_LOCAL,
237 .address = (struct sockaddr *)&rpcb_localaddr_rpcbind,
238 .addrsize = sizeof(rpcb_localaddr_rpcbind),
239 .servername = "localhost",
240 .program = &rpcb_program,
241 .version = RPCBVERS_2,
242 .authflavor = RPC_AUTH_NULL,
Trond Myklebust00326ed2013-08-05 14:10:43 -0400243 /*
244 * We turn off the idle timeout to prevent the kernel
245 * from automatically disconnecting the socket.
246 * Otherwise, we'd have to cache the mount namespace
247 * of the caller and somehow pass that to the socket
248 * reconnect code.
249 */
250 .flags = RPC_CLNT_CREATE_NO_IDLE_TIMEOUT,
Chuck Lever7402ab192011-05-09 15:22:55 -0400251 };
252 struct rpc_clnt *clnt, *clnt4;
253 int result = 0;
Chuck Levercc5598b2008-07-14 16:03:27 -0400254
Chuck Lever7402ab192011-05-09 15:22:55 -0400255 /*
256 * Because we requested an RPC PING at transport creation time,
257 * this works only if the user space portmapper is rpcbind, and
258 * it's listening on AF_LOCAL on the named socket.
259 */
260 clnt = rpc_create(&args);
261 if (IS_ERR(clnt)) {
262 dprintk("RPC: failed to create AF_LOCAL rpcbind "
263 "client (errno %ld).\n", PTR_ERR(clnt));
Stanislav Kinsburskycaea33d2012-07-20 15:57:48 +0400264 result = PTR_ERR(clnt);
Chuck Lever7402ab192011-05-09 15:22:55 -0400265 goto out;
266 }
267
268 clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
269 if (IS_ERR(clnt4)) {
270 dprintk("RPC: failed to bind second program to "
271 "rpcbind v4 client (errno %ld).\n",
272 PTR_ERR(clnt4));
273 clnt4 = NULL;
274 }
275
Trond Myklebust786615b2013-08-05 16:04:47 -0400276 rpcb_set_local(net, clnt, clnt4, true);
Chuck Lever7402ab192011-05-09 15:22:55 -0400277
278out:
279 return result;
280}
Chuck Leverc5266112009-12-03 15:58:56 -0500281
282/*
283 * Returns zero on success, otherwise a negative errno value
284 * is returned.
285 */
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400286static int rpcb_create_local_net(struct net *net)
Chuck Levercc5598b2008-07-14 16:03:27 -0400287{
Chuck Lever7402ab192011-05-09 15:22:55 -0400288 static const struct sockaddr_in rpcb_inaddr_loopback = {
289 .sin_family = AF_INET,
290 .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
291 .sin_port = htons(RPCBIND_PORT),
292 };
Chuck Levercc5598b2008-07-14 16:03:27 -0400293 struct rpc_create_args args = {
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400294 .net = net,
Chuck Lever2a76b3b2009-12-03 15:58:56 -0500295 .protocol = XPRT_TRANSPORT_TCP,
Chuck Lever5a462112009-12-03 15:58:56 -0500296 .address = (struct sockaddr *)&rpcb_inaddr_loopback,
297 .addrsize = sizeof(rpcb_inaddr_loopback),
Chuck Levercc5598b2008-07-14 16:03:27 -0400298 .servername = "localhost",
299 .program = &rpcb_program,
Chuck Leverc5266112009-12-03 15:58:56 -0500300 .version = RPCBVERS_2,
Chuck Levercc5598b2008-07-14 16:03:27 -0400301 .authflavor = RPC_AUTH_UNIX,
302 .flags = RPC_CLNT_CREATE_NOPING,
303 };
Chuck Leverc5266112009-12-03 15:58:56 -0500304 struct rpc_clnt *clnt, *clnt4;
305 int result = 0;
Chuck Levercc5598b2008-07-14 16:03:27 -0400306
Chuck Leverc5266112009-12-03 15:58:56 -0500307 clnt = rpc_create(&args);
308 if (IS_ERR(clnt)) {
309 dprintk("RPC: failed to create local rpcbind "
310 "client (errno %ld).\n", PTR_ERR(clnt));
Stanislav Kinsburskycaea33d2012-07-20 15:57:48 +0400311 result = PTR_ERR(clnt);
Chuck Leverc5266112009-12-03 15:58:56 -0500312 goto out;
313 }
314
315 /*
316 * This results in an RPC ping. On systems running portmapper,
317 * the v4 ping will fail. Proceed anyway, but disallow rpcb
318 * v4 upcalls.
319 */
320 clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
321 if (IS_ERR(clnt4)) {
Chuck Lever38359352010-09-21 16:55:48 -0400322 dprintk("RPC: failed to bind second program to "
323 "rpcbind v4 client (errno %ld).\n",
324 PTR_ERR(clnt4));
Chuck Leverc5266112009-12-03 15:58:56 -0500325 clnt4 = NULL;
326 }
327
Trond Myklebust786615b2013-08-05 16:04:47 -0400328 rpcb_set_local(net, clnt, clnt4, false);
Chuck Leverc5266112009-12-03 15:58:56 -0500329
330out:
Chuck Lever7402ab192011-05-09 15:22:55 -0400331 return result;
332}
333
334/*
335 * Returns zero on success, otherwise a negative errno value
336 * is returned.
337 */
Stanislav Kinsburskyf7a30c12012-01-13 12:52:51 +0400338int rpcb_create_local(struct net *net)
Chuck Lever7402ab192011-05-09 15:22:55 -0400339{
340 static DEFINE_MUTEX(rpcb_create_local_mutex);
341 int result = 0;
342
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400343 if (rpcb_get_local(net))
Chuck Lever7402ab192011-05-09 15:22:55 -0400344 return result;
345
346 mutex_lock(&rpcb_create_local_mutex);
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400347 if (rpcb_get_local(net))
Chuck Lever7402ab192011-05-09 15:22:55 -0400348 goto out;
349
Stanislav Kinsbursky2ea75a12012-01-13 12:52:18 +0400350 if (rpcb_create_local_unix(net) != 0)
351 result = rpcb_create_local_net(net);
Chuck Lever7402ab192011-05-09 15:22:55 -0400352
353out:
Chuck Leverc5266112009-12-03 15:58:56 -0500354 mutex_unlock(&rpcb_create_local_mutex);
355 return result;
Chuck Levercc5598b2008-07-14 16:03:27 -0400356}
357
Trond Myklebust6eac7d32012-01-20 13:53:37 -0500358static struct rpc_clnt *rpcb_create(struct net *net, const char *hostname,
Stanislav Kinsburskyc2550e02012-01-13 12:52:35 +0400359 struct sockaddr *srvaddr, size_t salen,
360 int proto, u32 version)
Chuck Levera5090502007-03-29 16:48:04 -0400361{
362 struct rpc_create_args args = {
Stanislav Kinsburskyc2550e02012-01-13 12:52:35 +0400363 .net = net,
Chuck Levera5090502007-03-29 16:48:04 -0400364 .protocol = proto,
365 .address = srvaddr,
Chuck Lever9f6ad262007-12-10 14:56:31 -0500366 .addrsize = salen,
Chuck Levera5090502007-03-29 16:48:04 -0400367 .servername = hostname,
368 .program = &rpcb_program,
369 .version = version,
370 .authflavor = RPC_AUTH_UNIX,
Chuck Lever423d8b02008-07-14 16:03:28 -0400371 .flags = (RPC_CLNT_CREATE_NOPING |
372 RPC_CLNT_CREATE_NONPRIVPORT),
Chuck Levera5090502007-03-29 16:48:04 -0400373 };
374
Chuck Leverd5b64432007-08-06 11:57:18 -0400375 switch (srvaddr->sa_family) {
376 case AF_INET:
377 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
378 break;
379 case AF_INET6:
380 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
381 break;
382 default:
Pavel Emelyanovc636b572010-10-06 13:45:56 +0400383 return ERR_PTR(-EAFNOSUPPORT);
Chuck Leverd5b64432007-08-06 11:57:18 -0400384 }
385
Chuck Levera5090502007-03-29 16:48:04 -0400386 return rpc_create(&args);
387}
388
Trond Myklebust786615b2013-08-05 16:04:47 -0400389static int rpcb_register_call(struct sunrpc_net *sn, struct rpc_clnt *clnt, struct rpc_message *msg, bool is_set)
Chuck Leverbabe80e2008-07-14 16:03:29 -0400390{
Trond Myklebust786615b2013-08-05 16:04:47 -0400391 int flags = RPC_TASK_NOCONNECT;
392 int error, result = 0;
Chuck Leverbabe80e2008-07-14 16:03:29 -0400393
Trond Myklebust786615b2013-08-05 16:04:47 -0400394 if (is_set || !sn->rpcb_is_af_local)
395 flags = RPC_TASK_SOFTCONN;
Chuck Lever14aeb212008-08-18 19:34:00 -0400396 msg->rpc_resp = &result;
Chuck Leverbabe80e2008-07-14 16:03:29 -0400397
Trond Myklebust786615b2013-08-05 16:04:47 -0400398 error = rpc_call_sync(clnt, msg, flags);
Chuck Lever14aeb212008-08-18 19:34:00 -0400399 if (error < 0) {
Chuck Lever363f7242009-03-18 20:47:44 -0400400 dprintk("RPC: failed to contact local rpcbind "
Chuck Leverbabe80e2008-07-14 16:03:29 -0400401 "server (errno %d).\n", -error);
Chuck Lever14aeb212008-08-18 19:34:00 -0400402 return error;
403 }
Chuck Leverbabe80e2008-07-14 16:03:29 -0400404
Chuck Leverdb820d62008-09-25 11:57:05 -0400405 if (!result)
Chuck Lever14aeb212008-08-18 19:34:00 -0400406 return -EACCES;
Chuck Lever14aeb212008-08-18 19:34:00 -0400407 return 0;
Chuck Leverbabe80e2008-07-14 16:03:29 -0400408}
409
Chuck Levera5090502007-03-29 16:48:04 -0400410/**
411 * rpcb_register - set or unset a port registration with the local rpcbind svc
Randy Dunlapbda14602012-05-13 10:35:40 -0700412 * @net: target network namespace
Chuck Levera5090502007-03-29 16:48:04 -0400413 * @prog: RPC program number to bind
414 * @vers: RPC version number to bind
Chuck Leverc2e1b092008-07-14 16:03:30 -0400415 * @prot: transport protocol to register
Chuck Levera5090502007-03-29 16:48:04 -0400416 * @port: port value to register
Chuck Lever14aeb212008-08-18 19:34:00 -0400417 *
418 * Returns zero if the registration request was dispatched successfully
419 * and the rpcbind daemon returned success. Otherwise, returns an errno
420 * value that reflects the nature of the error (request could not be
421 * dispatched, timed out, or rpcbind returned an error).
Chuck Levera5090502007-03-29 16:48:04 -0400422 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400423 * RPC services invoke this function to advertise their contact
424 * information via the system's rpcbind daemon. RPC services
425 * invoke this function once for each [program, version, transport]
426 * tuple they wish to advertise.
Chuck Levera5090502007-03-29 16:48:04 -0400427 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400428 * Callers may also unregister RPC services that are no longer
429 * available by setting the passed-in port to zero. This removes
430 * all registered transports for [program, version] from the local
431 * rpcbind database.
432 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400433 * This function uses rpcbind protocol version 2 to contact the
434 * local rpcbind daemon.
435 *
436 * Registration works over both AF_INET and AF_INET6, and services
437 * registered via this function are advertised as available for any
438 * address. If the local rpcbind daemon is listening on AF_INET6,
439 * services registered via this function will be advertised on
440 * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6
441 * addresses).
Chuck Levera5090502007-03-29 16:48:04 -0400442 */
Stanislav Kinsbursky977ac312012-01-13 12:52:43 +0400443int rpcb_register(struct net *net, u32 prog, u32 vers, int prot, unsigned short port)
Chuck Levera5090502007-03-29 16:48:04 -0400444{
Chuck Levera5090502007-03-29 16:48:04 -0400445 struct rpcbind_args map = {
446 .r_prog = prog,
447 .r_vers = vers,
448 .r_prot = prot,
449 .r_port = port,
450 };
451 struct rpc_message msg = {
Chuck Levera5090502007-03-29 16:48:04 -0400452 .rpc_argp = &map,
Chuck Levera5090502007-03-29 16:48:04 -0400453 };
Stanislav Kinsbursky977ac312012-01-13 12:52:43 +0400454 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
Trond Myklebust786615b2013-08-05 16:04:47 -0400455 bool is_set = false;
Chuck Levera5090502007-03-29 16:48:04 -0400456
457 dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
458 "rpcbind\n", (port ? "" : "un"),
459 prog, vers, prot, port);
460
Chuck Leverbabe80e2008-07-14 16:03:29 -0400461 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET];
Trond Myklebust786615b2013-08-05 16:04:47 -0400462 if (port != 0) {
Chuck Leverbabe80e2008-07-14 16:03:29 -0400463 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET];
Trond Myklebust786615b2013-08-05 16:04:47 -0400464 is_set = true;
465 }
Chuck Leverbabe80e2008-07-14 16:03:29 -0400466
Trond Myklebust786615b2013-08-05 16:04:47 -0400467 return rpcb_register_call(sn, sn->rpcb_local_clnt, &msg, is_set);
Chuck Levera5090502007-03-29 16:48:04 -0400468}
469
Chuck Leverc2e1b092008-07-14 16:03:30 -0400470/*
471 * Fill in AF_INET family-specific arguments to register
472 */
Stanislav Kinsbursky1a114a62012-01-13 12:52:26 +0400473static int rpcb_register_inet4(struct sunrpc_net *sn,
474 const struct sockaddr *sap,
Chuck Lever1673d0d2009-03-18 20:47:21 -0400475 struct rpc_message *msg)
Chuck Leverc2e1b092008-07-14 16:03:30 -0400476{
Chuck Lever3aba4552009-03-18 20:47:06 -0400477 const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400478 struct rpcbind_args *map = msg->rpc_argp;
Chuck Lever3aba4552009-03-18 20:47:06 -0400479 unsigned short port = ntohs(sin->sin_port);
Trond Myklebust786615b2013-08-05 16:04:47 -0400480 bool is_set = false;
Chuck Leverba809132009-08-09 15:09:35 -0400481 int result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400482
Trond Myklebustd77385f2011-10-17 16:08:10 -0700483 map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400484
485 dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
486 "local rpcbind\n", (port ? "" : "un"),
487 map->r_prog, map->r_vers,
488 map->r_addr, map->r_netid);
489
490 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
Trond Myklebust786615b2013-08-05 16:04:47 -0400491 if (port != 0) {
Chuck Leverc2e1b092008-07-14 16:03:30 -0400492 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
Trond Myklebust786615b2013-08-05 16:04:47 -0400493 is_set = true;
494 }
Chuck Leverc2e1b092008-07-14 16:03:30 -0400495
Trond Myklebust786615b2013-08-05 16:04:47 -0400496 result = rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, is_set);
Chuck Leverba809132009-08-09 15:09:35 -0400497 kfree(map->r_addr);
498 return result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400499}
500
501/*
502 * Fill in AF_INET6 family-specific arguments to register
503 */
Stanislav Kinsbursky1a114a62012-01-13 12:52:26 +0400504static int rpcb_register_inet6(struct sunrpc_net *sn,
505 const struct sockaddr *sap,
Chuck Lever1673d0d2009-03-18 20:47:21 -0400506 struct rpc_message *msg)
Chuck Leverc2e1b092008-07-14 16:03:30 -0400507{
Chuck Lever3aba4552009-03-18 20:47:06 -0400508 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400509 struct rpcbind_args *map = msg->rpc_argp;
Chuck Lever3aba4552009-03-18 20:47:06 -0400510 unsigned short port = ntohs(sin6->sin6_port);
Trond Myklebust786615b2013-08-05 16:04:47 -0400511 bool is_set = false;
Chuck Leverba809132009-08-09 15:09:35 -0400512 int result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400513
Trond Myklebustd77385f2011-10-17 16:08:10 -0700514 map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400515
516 dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
517 "local rpcbind\n", (port ? "" : "un"),
518 map->r_prog, map->r_vers,
519 map->r_addr, map->r_netid);
520
521 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
Trond Myklebust786615b2013-08-05 16:04:47 -0400522 if (port != 0) {
Chuck Leverc2e1b092008-07-14 16:03:30 -0400523 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
Trond Myklebust786615b2013-08-05 16:04:47 -0400524 is_set = true;
525 }
Chuck Leverc2e1b092008-07-14 16:03:30 -0400526
Trond Myklebust786615b2013-08-05 16:04:47 -0400527 result = rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, is_set);
Chuck Leverba809132009-08-09 15:09:35 -0400528 kfree(map->r_addr);
529 return result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400530}
531
Stanislav Kinsbursky1a114a62012-01-13 12:52:26 +0400532static int rpcb_unregister_all_protofamilies(struct sunrpc_net *sn,
533 struct rpc_message *msg)
Chuck Lever1673d0d2009-03-18 20:47:21 -0400534{
535 struct rpcbind_args *map = msg->rpc_argp;
536
537 dprintk("RPC: unregistering [%u, %u, '%s'] with "
538 "local rpcbind\n",
539 map->r_prog, map->r_vers, map->r_netid);
540
541 map->r_addr = "";
542 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
543
Trond Myklebust786615b2013-08-05 16:04:47 -0400544 return rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, false);
Chuck Lever1673d0d2009-03-18 20:47:21 -0400545}
546
Chuck Leverc2e1b092008-07-14 16:03:30 -0400547/**
548 * rpcb_v4_register - set or unset a port registration with the local rpcbind
Randy Dunlapbda14602012-05-13 10:35:40 -0700549 * @net: target network namespace
Chuck Leverc2e1b092008-07-14 16:03:30 -0400550 * @program: RPC program number of service to (un)register
551 * @version: RPC version number of service to (un)register
552 * @address: address family, IP address, and port to (un)register
553 * @netid: netid of transport protocol to (un)register
Chuck Lever14aeb212008-08-18 19:34:00 -0400554 *
555 * Returns zero if the registration request was dispatched successfully
556 * and the rpcbind daemon returned success. Otherwise, returns an errno
557 * value that reflects the nature of the error (request could not be
558 * dispatched, timed out, or rpcbind returned an error).
Chuck Leverc2e1b092008-07-14 16:03:30 -0400559 *
560 * RPC services invoke this function to advertise their contact
561 * information via the system's rpcbind daemon. RPC services
562 * invoke this function once for each [program, version, address,
563 * netid] tuple they wish to advertise.
564 *
Chuck Lever1673d0d2009-03-18 20:47:21 -0400565 * Callers may also unregister RPC services that are registered at a
566 * specific address by setting the port number in @address to zero.
567 * They may unregister all registered protocol families at once for
568 * a service by passing a NULL @address argument. If @netid is ""
569 * then all netids for [program, version, address] are unregistered.
Chuck Leverc2e1b092008-07-14 16:03:30 -0400570 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400571 * This function uses rpcbind protocol version 4 to contact the
572 * local rpcbind daemon. The local rpcbind daemon must support
573 * version 4 of the rpcbind protocol in order for these functions
574 * to register a service successfully.
575 *
576 * Supported netids include "udp" and "tcp" for UDP and TCP over
577 * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6,
578 * respectively.
579 *
580 * The contents of @address determine the address family and the
581 * port to be registered. The usual practice is to pass INADDR_ANY
582 * as the raw address, but specifying a non-zero address is also
583 * supported by this API if the caller wishes to advertise an RPC
584 * service on a specific network interface.
585 *
586 * Note that passing in INADDR_ANY does not create the same service
587 * registration as IN6ADDR_ANY. The former advertises an RPC
588 * service on any IPv4 address, but not on IPv6. The latter
589 * advertises the service on all IPv4 and IPv6 addresses.
590 */
Stanislav Kinsbursky977ac312012-01-13 12:52:43 +0400591int rpcb_v4_register(struct net *net, const u32 program, const u32 version,
Chuck Lever14aeb212008-08-18 19:34:00 -0400592 const struct sockaddr *address, const char *netid)
Chuck Leverc2e1b092008-07-14 16:03:30 -0400593{
594 struct rpcbind_args map = {
595 .r_prog = program,
596 .r_vers = version,
597 .r_netid = netid,
598 .r_owner = RPCB_OWNER_STRING,
599 };
600 struct rpc_message msg = {
601 .rpc_argp = &map,
Chuck Leverc2e1b092008-07-14 16:03:30 -0400602 };
Stanislav Kinsbursky977ac312012-01-13 12:52:43 +0400603 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
Chuck Leverc5266112009-12-03 15:58:56 -0500604
Stanislav Kinsburskydff02d42012-01-13 12:52:10 +0400605 if (sn->rpcb_local_clnt4 == NULL)
Chuck Leverc5266112009-12-03 15:58:56 -0500606 return -EPROTONOSUPPORT;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400607
Chuck Lever1673d0d2009-03-18 20:47:21 -0400608 if (address == NULL)
Stanislav Kinsbursky1a114a62012-01-13 12:52:26 +0400609 return rpcb_unregister_all_protofamilies(sn, &msg);
Chuck Lever1673d0d2009-03-18 20:47:21 -0400610
Chuck Leverc2e1b092008-07-14 16:03:30 -0400611 switch (address->sa_family) {
612 case AF_INET:
Stanislav Kinsbursky1a114a62012-01-13 12:52:26 +0400613 return rpcb_register_inet4(sn, address, &msg);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400614 case AF_INET6:
Stanislav Kinsbursky1a114a62012-01-13 12:52:26 +0400615 return rpcb_register_inet6(sn, address, &msg);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400616 }
617
618 return -EAFNOSUPPORT;
619}
620
Trond Myklebust803a9062008-07-01 15:20:55 -0400621static 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 -0400622{
623 struct rpc_message msg = {
Trond Myklebust803a9062008-07-01 15:20:55 -0400624 .rpc_proc = proc,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400625 .rpc_argp = map,
Chuck Leverc0c077d2009-08-09 15:09:43 -0400626 .rpc_resp = map,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400627 };
628 struct rpc_task_setup task_setup_data = {
629 .rpc_client = rpcb_clnt,
630 .rpc_message = &msg,
631 .callback_ops = &rpcb_getport_ops,
632 .callback_data = map,
Chuck Lever012da152009-12-03 15:58:56 -0500633 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400634 };
635
636 return rpc_run_task(&task_setup_data);
637}
638
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400639/*
640 * In the case where rpc clients have been cloned, we want to make
641 * sure that we use the program number/version etc of the actual
642 * owner of the xprt. To do so, we walk back up the tree of parents
643 * to find whoever created the transport and/or whoever has the
644 * autobind flag set.
645 */
646static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt)
647{
648 struct rpc_clnt *parent = clnt->cl_parent;
Trond Myklebust2446ab62012-03-01 17:00:56 -0500649 struct rpc_xprt *xprt = rcu_dereference(clnt->cl_xprt);
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400650
651 while (parent != clnt) {
Trond Myklebust2446ab62012-03-01 17:00:56 -0500652 if (rcu_dereference(parent->cl_xprt) != xprt)
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400653 break;
654 if (clnt->cl_autobind)
655 break;
656 clnt = parent;
657 parent = parent->cl_parent;
658 }
659 return clnt;
660}
661
Chuck Levera5090502007-03-29 16:48:04 -0400662/**
Chuck Lever45160d62007-07-01 12:13:17 -0400663 * rpcb_getport_async - obtain the port for a given RPC service on a given host
Chuck Levera5090502007-03-29 16:48:04 -0400664 * @task: task that is waiting for portmapper request
665 *
666 * This one can be called for an ongoing RPC request, and can be used in
667 * an async (rpciod) context.
668 */
Chuck Lever45160d62007-07-01 12:13:17 -0400669void rpcb_getport_async(struct rpc_task *task)
Chuck Levera5090502007-03-29 16:48:04 -0400670{
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400671 struct rpc_clnt *clnt;
Trond Myklebust803a9062008-07-01 15:20:55 -0400672 struct rpc_procinfo *proc;
Chuck Lever0a48f5d2007-12-10 14:56:38 -0500673 u32 bind_version;
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400674 struct rpc_xprt *xprt;
Chuck Levera5090502007-03-29 16:48:04 -0400675 struct rpc_clnt *rpcb_clnt;
Ben Greearec0dd262011-07-12 10:27:55 -0700676 struct rpcbind_args *map;
Chuck Levera5090502007-03-29 16:48:04 -0400677 struct rpc_task *child;
Chuck Lever9f6ad262007-12-10 14:56:31 -0500678 struct sockaddr_storage addr;
679 struct sockaddr *sap = (struct sockaddr *)&addr;
680 size_t salen;
Chuck Levera5090502007-03-29 16:48:04 -0400681 int status;
682
Trond Myklebust2446ab62012-03-01 17:00:56 -0500683 rcu_read_lock();
684 do {
685 clnt = rpcb_find_transport_owner(task->tk_client);
686 xprt = xprt_get(rcu_dereference(clnt->cl_xprt));
687 } while (xprt == NULL);
688 rcu_read_unlock();
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400689
Chuck Lever45160d62007-07-01 12:13:17 -0400690 dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800691 task->tk_pid, __func__,
Trond Myklebust4e0038b2012-03-01 17:01:05 -0500692 xprt->servername, clnt->cl_prog, clnt->cl_vers, xprt->prot);
Chuck Levera5090502007-03-29 16:48:04 -0400693
Trond Myklebust381ba742008-07-07 12:18:53 -0400694 /* Put self on the wait queue to ensure we get notified if
695 * some other task is already attempting to bind the port */
696 rpc_sleep_on(&xprt->binding, task, NULL);
697
Chuck Levera5090502007-03-29 16:48:04 -0400698 if (xprt_test_and_set_binding(xprt)) {
Chuck Lever45160d62007-07-01 12:13:17 -0400699 dprintk("RPC: %5u %s: waiting for another binder\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800700 task->tk_pid, __func__);
Trond Myklebust2446ab62012-03-01 17:00:56 -0500701 xprt_put(xprt);
Trond Myklebust381ba742008-07-07 12:18:53 -0400702 return;
Chuck Levera5090502007-03-29 16:48:04 -0400703 }
704
Chuck Levera5090502007-03-29 16:48:04 -0400705 /* Someone else may have bound if we slept */
706 if (xprt_bound(xprt)) {
707 status = 0;
Chuck Lever45160d62007-07-01 12:13:17 -0400708 dprintk("RPC: %5u %s: already bound\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800709 task->tk_pid, __func__);
Chuck Levera5090502007-03-29 16:48:04 -0400710 goto bailout_nofree;
711 }
712
Chuck Leverba809132009-08-09 15:09:35 -0400713 /* Parent transport's destination address */
Chuck Lever9f6ad262007-12-10 14:56:31 -0500714 salen = rpc_peeraddr(clnt, sap, sizeof(addr));
Chuck Leverd5b64432007-08-06 11:57:18 -0400715
716 /* Don't ever use rpcbind v2 for AF_INET6 requests */
Chuck Lever9f6ad262007-12-10 14:56:31 -0500717 switch (sap->sa_family) {
Chuck Leverd5b64432007-08-06 11:57:18 -0400718 case AF_INET:
Trond Myklebust803a9062008-07-01 15:20:55 -0400719 proc = rpcb_next_version[xprt->bind_index].rpc_proc;
720 bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
Chuck Leverd5b64432007-08-06 11:57:18 -0400721 break;
722 case AF_INET6:
Trond Myklebust803a9062008-07-01 15:20:55 -0400723 proc = rpcb_next_version6[xprt->bind_index].rpc_proc;
724 bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers;
Chuck Leverd5b64432007-08-06 11:57:18 -0400725 break;
726 default:
727 status = -EAFNOSUPPORT;
728 dprintk("RPC: %5u %s: bad address family\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800729 task->tk_pid, __func__);
Chuck Leverd5b64432007-08-06 11:57:18 -0400730 goto bailout_nofree;
731 }
Trond Myklebust803a9062008-07-01 15:20:55 -0400732 if (proc == NULL) {
Chuck Levera5090502007-03-29 16:48:04 -0400733 xprt->bind_index = 0;
Chuck Lever906462a2007-09-11 18:00:47 -0400734 status = -EPFNOSUPPORT;
Chuck Lever45160d62007-07-01 12:13:17 -0400735 dprintk("RPC: %5u %s: no more getport versions available\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800736 task->tk_pid, __func__);
Chuck Levera5090502007-03-29 16:48:04 -0400737 goto bailout_nofree;
738 }
Chuck Levera5090502007-03-29 16:48:04 -0400739
Chuck Lever45160d62007-07-01 12:13:17 -0400740 dprintk("RPC: %5u %s: trying rpcbind version %u\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800741 task->tk_pid, __func__, bind_version);
Chuck Levera5090502007-03-29 16:48:04 -0400742
Trond Myklebust4e0038b2012-03-01 17:01:05 -0500743 rpcb_clnt = rpcb_create(xprt->xprt_net, xprt->servername, sap, salen,
Stanislav Kinsburskyc2550e02012-01-13 12:52:35 +0400744 xprt->prot, bind_version);
Chuck Lever143b6c42007-08-16 16:03:31 -0400745 if (IS_ERR(rpcb_clnt)) {
746 status = PTR_ERR(rpcb_clnt);
747 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800748 task->tk_pid, __func__, PTR_ERR(rpcb_clnt));
Chuck Lever143b6c42007-08-16 16:03:31 -0400749 goto bailout_nofree;
750 }
751
Chuck Levera5090502007-03-29 16:48:04 -0400752 map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
753 if (!map) {
754 status = -ENOMEM;
Chuck Lever45160d62007-07-01 12:13:17 -0400755 dprintk("RPC: %5u %s: no memory available\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800756 task->tk_pid, __func__);
Trond Myklebust96165e22008-10-03 16:48:40 -0400757 goto bailout_release_client;
Chuck Levera5090502007-03-29 16:48:04 -0400758 }
759 map->r_prog = clnt->cl_prog;
760 map->r_vers = clnt->cl_vers;
761 map->r_prot = xprt->prot;
762 map->r_port = 0;
Bryan Schumaker864cf9b2012-03-27 13:46:32 -0400763 map->r_xprt = xprt;
Trond Myklebust381ba742008-07-07 12:18:53 -0400764 map->r_status = -EIO;
Chuck Levera5090502007-03-29 16:48:04 -0400765
Chuck Leverba809132009-08-09 15:09:35 -0400766 switch (bind_version) {
767 case RPCBVERS_4:
768 case RPCBVERS_3:
Trond Myklebust2446ab62012-03-01 17:00:56 -0500769 map->r_netid = xprt->address_strings[RPC_DISPLAY_NETID];
Trond Myklebustd77385f2011-10-17 16:08:10 -0700770 map->r_addr = rpc_sockaddr2uaddr(sap, GFP_ATOMIC);
Chuck Leverba809132009-08-09 15:09:35 -0400771 map->r_owner = "";
772 break;
773 case RPCBVERS_2:
774 map->r_addr = NULL;
775 break;
776 default:
777 BUG();
778 }
779
Trond Myklebust803a9062008-07-01 15:20:55 -0400780 child = rpcb_call_async(rpcb_clnt, map, proc);
Trond Myklebust4c402b42007-06-14 16:40:32 -0400781 rpc_release_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400782 if (IS_ERR(child)) {
Trond Myklebust0d3a34b2008-07-07 12:18:52 -0400783 /* rpcb_map_release() has freed the arguments */
Chuck Lever45160d62007-07-01 12:13:17 -0400784 dprintk("RPC: %5u %s: rpc_run_task failed\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800785 task->tk_pid, __func__);
Trond Myklebust381ba742008-07-07 12:18:53 -0400786 return;
Chuck Levera5090502007-03-29 16:48:04 -0400787 }
Chuck Levera5090502007-03-29 16:48:04 -0400788
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400789 xprt->stat.bind_count++;
790 rpc_put_task(child);
Chuck Levera5090502007-03-29 16:48:04 -0400791 return;
792
Trond Myklebust96165e22008-10-03 16:48:40 -0400793bailout_release_client:
794 rpc_release_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400795bailout_nofree:
796 rpcb_wake_rpcbind_waiters(xprt, status);
Chuck Levera5090502007-03-29 16:48:04 -0400797 task->tk_status = status;
Trond Myklebust2446ab62012-03-01 17:00:56 -0500798 xprt_put(xprt);
Chuck Levera5090502007-03-29 16:48:04 -0400799}
\"Talpey, Thomas\12444802007-09-10 13:45:36 -0400800EXPORT_SYMBOL_GPL(rpcb_getport_async);
Chuck Levera5090502007-03-29 16:48:04 -0400801
802/*
803 * Rpcbind child task calls this callback via tk_exit.
804 */
805static void rpcb_getport_done(struct rpc_task *child, void *data)
806{
807 struct rpcbind_args *map = data;
808 struct rpc_xprt *xprt = map->r_xprt;
809 int status = child->tk_status;
810
Chuck Lever4784cb52007-09-11 18:00:36 -0400811 /* Garbage reply: retry with a lesser rpcbind version */
812 if (status == -EIO)
813 status = -EPROTONOSUPPORT;
814
Chuck Levera5090502007-03-29 16:48:04 -0400815 /* rpcbind server doesn't support this rpcbind protocol version */
816 if (status == -EPROTONOSUPPORT)
817 xprt->bind_index++;
818
819 if (status < 0) {
820 /* rpcbind server not available on remote host? */
821 xprt->ops->set_port(xprt, 0);
822 } else if (map->r_port == 0) {
823 /* Requested RPC service wasn't registered on remote host */
824 xprt->ops->set_port(xprt, 0);
825 status = -EACCES;
826 } else {
827 /* Succeeded */
828 xprt->ops->set_port(xprt, map->r_port);
829 xprt_set_bound(xprt);
830 status = 0;
831 }
832
833 dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
834 child->tk_pid, status, map->r_port);
835
Trond Myklebust381ba742008-07-07 12:18:53 -0400836 map->r_status = status;
Chuck Levera5090502007-03-29 16:48:04 -0400837}
838
Chuck Lever166b88d2008-07-14 16:03:26 -0400839/*
840 * XDR functions for rpcbind
841 */
842
Chuck Lever9f06c712010-12-14 14:59:18 +0000843static void rpcb_enc_mapping(struct rpc_rqst *req, struct xdr_stream *xdr,
844 const struct rpcbind_args *rpcb)
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400845{
Chuck Lever9f06c712010-12-14 14:59:18 +0000846 __be32 *p;
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400847
848 dprintk("RPC: %5u encoding PMAP_%s call (%u, %u, %d, %u)\n",
Trond Myklebustffa94db2012-03-20 09:22:00 -0400849 req->rq_task->tk_pid,
850 req->rq_task->tk_msg.rpc_proc->p_name,
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400851 rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
852
Chuck Lever9f06c712010-12-14 14:59:18 +0000853 p = xdr_reserve_space(xdr, RPCB_mappingargs_sz << 2);
Chuck Lever4129ccf2010-12-14 14:58:59 +0000854 *p++ = cpu_to_be32(rpcb->r_prog);
855 *p++ = cpu_to_be32(rpcb->r_vers);
856 *p++ = cpu_to_be32(rpcb->r_prot);
857 *p = cpu_to_be32(rpcb->r_port);
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400858}
859
Chuck Leverbf269552010-12-14 14:59:29 +0000860static int rpcb_dec_getport(struct rpc_rqst *req, struct xdr_stream *xdr,
Chuck Leverc0c077d2009-08-09 15:09:43 -0400861 struct rpcbind_args *rpcb)
862{
Chuck Leverc0c077d2009-08-09 15:09:43 -0400863 unsigned long port;
Chuck Leverbf269552010-12-14 14:59:29 +0000864 __be32 *p;
Chuck Leverc0c077d2009-08-09 15:09:43 -0400865
866 rpcb->r_port = 0;
867
Chuck Leverbf269552010-12-14 14:59:29 +0000868 p = xdr_inline_decode(xdr, 4);
Chuck Leverc0c077d2009-08-09 15:09:43 -0400869 if (unlikely(p == NULL))
870 return -EIO;
871
Chuck Lever4129ccf2010-12-14 14:58:59 +0000872 port = be32_to_cpup(p);
Trond Myklebustffa94db2012-03-20 09:22:00 -0400873 dprintk("RPC: %5u PMAP_%s result: %lu\n", req->rq_task->tk_pid,
874 req->rq_task->tk_msg.rpc_proc->p_name, port);
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700875 if (unlikely(port > USHRT_MAX))
Chuck Leverc0c077d2009-08-09 15:09:43 -0400876 return -EIO;
877
878 rpcb->r_port = port;
879 return 0;
880}
881
Chuck Leverbf269552010-12-14 14:59:29 +0000882static int rpcb_dec_set(struct rpc_rqst *req, struct xdr_stream *xdr,
Chuck Lever7ed0ff92009-08-09 15:09:42 -0400883 unsigned int *boolp)
884{
Chuck Leverbf269552010-12-14 14:59:29 +0000885 __be32 *p;
Chuck Lever7ed0ff92009-08-09 15:09:42 -0400886
Chuck Leverbf269552010-12-14 14:59:29 +0000887 p = xdr_inline_decode(xdr, 4);
Chuck Lever7ed0ff92009-08-09 15:09:42 -0400888 if (unlikely(p == NULL))
889 return -EIO;
890
891 *boolp = 0;
Chuck Leverbf269552010-12-14 14:59:29 +0000892 if (*p != xdr_zero)
Chuck Lever7ed0ff92009-08-09 15:09:42 -0400893 *boolp = 1;
894
895 dprintk("RPC: %5u RPCB_%s call %s\n",
Trond Myklebustffa94db2012-03-20 09:22:00 -0400896 req->rq_task->tk_pid,
897 req->rq_task->tk_msg.rpc_proc->p_name,
Chuck Lever7ed0ff92009-08-09 15:09:42 -0400898 (*boolp ? "succeeded" : "failed"));
899 return 0;
900}
901
Chuck Lever4129ccf2010-12-14 14:58:59 +0000902static void encode_rpcb_string(struct xdr_stream *xdr, const char *string,
903 const u32 maxstrlen)
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400904{
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400905 __be32 *p;
Chuck Lever4129ccf2010-12-14 14:58:59 +0000906 u32 len;
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400907
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400908 len = strlen(string);
Weston Andros Adamson332e0082012-10-23 10:43:44 -0400909 WARN_ON_ONCE(len > maxstrlen);
910 if (len > maxstrlen)
911 /* truncate and hope for the best */
912 len = maxstrlen;
Chuck Lever4129ccf2010-12-14 14:58:59 +0000913 p = xdr_reserve_space(xdr, 4 + len);
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400914 xdr_encode_opaque(p, string, len);
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400915}
916
Chuck Lever9f06c712010-12-14 14:59:18 +0000917static void rpcb_enc_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr,
918 const struct rpcbind_args *rpcb)
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400919{
Chuck Lever9f06c712010-12-14 14:59:18 +0000920 __be32 *p;
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400921
922 dprintk("RPC: %5u encoding RPCB_%s call (%u, %u, '%s', '%s')\n",
Trond Myklebustffa94db2012-03-20 09:22:00 -0400923 req->rq_task->tk_pid,
924 req->rq_task->tk_msg.rpc_proc->p_name,
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400925 rpcb->r_prog, rpcb->r_vers,
926 rpcb->r_netid, rpcb->r_addr);
927
Chuck Lever9f06c712010-12-14 14:59:18 +0000928 p = xdr_reserve_space(xdr, (RPCB_program_sz + RPCB_version_sz) << 2);
Chuck Lever4129ccf2010-12-14 14:58:59 +0000929 *p++ = cpu_to_be32(rpcb->r_prog);
930 *p = cpu_to_be32(rpcb->r_vers);
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400931
Chuck Lever9f06c712010-12-14 14:59:18 +0000932 encode_rpcb_string(xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN);
933 encode_rpcb_string(xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN);
934 encode_rpcb_string(xdr, rpcb->r_owner, RPCB_MAXOWNERLEN);
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400935}
936
Chuck Leverbf269552010-12-14 14:59:29 +0000937static int rpcb_dec_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr,
Chuck Leverc0c077d2009-08-09 15:09:43 -0400938 struct rpcbind_args *rpcb)
939{
940 struct sockaddr_storage address;
941 struct sockaddr *sap = (struct sockaddr *)&address;
Chuck Leverbf269552010-12-14 14:59:29 +0000942 __be32 *p;
Chuck Leverc0c077d2009-08-09 15:09:43 -0400943 u32 len;
944
945 rpcb->r_port = 0;
946
Chuck Leverbf269552010-12-14 14:59:29 +0000947 p = xdr_inline_decode(xdr, 4);
Chuck Leverc0c077d2009-08-09 15:09:43 -0400948 if (unlikely(p == NULL))
949 goto out_fail;
Chuck Lever4129ccf2010-12-14 14:58:59 +0000950 len = be32_to_cpup(p);
Chuck Leverc0c077d2009-08-09 15:09:43 -0400951
952 /*
953 * If the returned universal address is a null string,
954 * the requested RPC service was not registered.
955 */
956 if (len == 0) {
957 dprintk("RPC: %5u RPCB reply: program not registered\n",
Trond Myklebustffa94db2012-03-20 09:22:00 -0400958 req->rq_task->tk_pid);
Chuck Leverc0c077d2009-08-09 15:09:43 -0400959 return 0;
960 }
961
962 if (unlikely(len > RPCBIND_MAXUADDRLEN))
963 goto out_fail;
964
Chuck Leverbf269552010-12-14 14:59:29 +0000965 p = xdr_inline_decode(xdr, len);
Chuck Leverc0c077d2009-08-09 15:09:43 -0400966 if (unlikely(p == NULL))
967 goto out_fail;
Trond Myklebustffa94db2012-03-20 09:22:00 -0400968 dprintk("RPC: %5u RPCB_%s reply: %s\n", req->rq_task->tk_pid,
969 req->rq_task->tk_msg.rpc_proc->p_name, (char *)p);
Chuck Leverc0c077d2009-08-09 15:09:43 -0400970
Stanislav Kinsburskyb030fb02012-01-13 14:02:40 +0400971 if (rpc_uaddr2sockaddr(req->rq_xprt->xprt_net, (char *)p, len,
972 sap, sizeof(address)) == 0)
Chuck Leverc0c077d2009-08-09 15:09:43 -0400973 goto out_fail;
974 rpcb->r_port = rpc_get_port(sap);
975
976 return 0;
977
978out_fail:
979 dprintk("RPC: %5u malformed RPCB_%s reply\n",
Trond Myklebustffa94db2012-03-20 09:22:00 -0400980 req->rq_task->tk_pid,
981 req->rq_task->tk_msg.rpc_proc->p_name);
Chuck Leverc0c077d2009-08-09 15:09:43 -0400982 return -EIO;
983}
984
Chuck Levera5090502007-03-29 16:48:04 -0400985/*
986 * Not all rpcbind procedures described in RFC 1833 are implemented
987 * since the Linux kernel RPC code requires only these.
988 */
Chuck Leverf8b761e2009-08-09 15:09:44 -0400989
Chuck Levera5090502007-03-29 16:48:04 -0400990static struct rpc_procinfo rpcb_procedures2[] = {
Chuck Leverf8b761e2009-08-09 15:09:44 -0400991 [RPCBPROC_SET] = {
992 .p_proc = RPCBPROC_SET,
Chuck Lever9f06c712010-12-14 14:59:18 +0000993 .p_encode = (kxdreproc_t)rpcb_enc_mapping,
Chuck Leverbf269552010-12-14 14:59:29 +0000994 .p_decode = (kxdrdproc_t)rpcb_dec_set,
Chuck Leverf8b761e2009-08-09 15:09:44 -0400995 .p_arglen = RPCB_mappingargs_sz,
996 .p_replen = RPCB_setres_sz,
997 .p_statidx = RPCBPROC_SET,
998 .p_timer = 0,
999 .p_name = "SET",
1000 },
1001 [RPCBPROC_UNSET] = {
1002 .p_proc = RPCBPROC_UNSET,
Chuck Lever9f06c712010-12-14 14:59:18 +00001003 .p_encode = (kxdreproc_t)rpcb_enc_mapping,
Chuck Leverbf269552010-12-14 14:59:29 +00001004 .p_decode = (kxdrdproc_t)rpcb_dec_set,
Chuck Leverf8b761e2009-08-09 15:09:44 -04001005 .p_arglen = RPCB_mappingargs_sz,
1006 .p_replen = RPCB_setres_sz,
1007 .p_statidx = RPCBPROC_UNSET,
1008 .p_timer = 0,
1009 .p_name = "UNSET",
1010 },
1011 [RPCBPROC_GETPORT] = {
1012 .p_proc = RPCBPROC_GETPORT,
Chuck Lever9f06c712010-12-14 14:59:18 +00001013 .p_encode = (kxdreproc_t)rpcb_enc_mapping,
Chuck Leverbf269552010-12-14 14:59:29 +00001014 .p_decode = (kxdrdproc_t)rpcb_dec_getport,
Chuck Leverf8b761e2009-08-09 15:09:44 -04001015 .p_arglen = RPCB_mappingargs_sz,
1016 .p_replen = RPCB_getportres_sz,
1017 .p_statidx = RPCBPROC_GETPORT,
1018 .p_timer = 0,
1019 .p_name = "GETPORT",
1020 },
Chuck Levera5090502007-03-29 16:48:04 -04001021};
1022
1023static struct rpc_procinfo rpcb_procedures3[] = {
Chuck Leverf8b761e2009-08-09 15:09:44 -04001024 [RPCBPROC_SET] = {
1025 .p_proc = RPCBPROC_SET,
Chuck Lever9f06c712010-12-14 14:59:18 +00001026 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
Chuck Leverbf269552010-12-14 14:59:29 +00001027 .p_decode = (kxdrdproc_t)rpcb_dec_set,
Chuck Leverf8b761e2009-08-09 15:09:44 -04001028 .p_arglen = RPCB_getaddrargs_sz,
1029 .p_replen = RPCB_setres_sz,
1030 .p_statidx = RPCBPROC_SET,
1031 .p_timer = 0,
1032 .p_name = "SET",
1033 },
1034 [RPCBPROC_UNSET] = {
1035 .p_proc = RPCBPROC_UNSET,
Chuck Lever9f06c712010-12-14 14:59:18 +00001036 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
Chuck Leverbf269552010-12-14 14:59:29 +00001037 .p_decode = (kxdrdproc_t)rpcb_dec_set,
Chuck Leverf8b761e2009-08-09 15:09:44 -04001038 .p_arglen = RPCB_getaddrargs_sz,
1039 .p_replen = RPCB_setres_sz,
1040 .p_statidx = RPCBPROC_UNSET,
1041 .p_timer = 0,
1042 .p_name = "UNSET",
1043 },
1044 [RPCBPROC_GETADDR] = {
1045 .p_proc = RPCBPROC_GETADDR,
Chuck Lever9f06c712010-12-14 14:59:18 +00001046 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
Chuck Leverbf269552010-12-14 14:59:29 +00001047 .p_decode = (kxdrdproc_t)rpcb_dec_getaddr,
Chuck Leverf8b761e2009-08-09 15:09:44 -04001048 .p_arglen = RPCB_getaddrargs_sz,
1049 .p_replen = RPCB_getaddrres_sz,
1050 .p_statidx = RPCBPROC_GETADDR,
1051 .p_timer = 0,
1052 .p_name = "GETADDR",
1053 },
Chuck Levera5090502007-03-29 16:48:04 -04001054};
1055
1056static struct rpc_procinfo rpcb_procedures4[] = {
Chuck Leverf8b761e2009-08-09 15:09:44 -04001057 [RPCBPROC_SET] = {
1058 .p_proc = RPCBPROC_SET,
Chuck Lever9f06c712010-12-14 14:59:18 +00001059 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
Chuck Leverbf269552010-12-14 14:59:29 +00001060 .p_decode = (kxdrdproc_t)rpcb_dec_set,
Chuck Leverf8b761e2009-08-09 15:09:44 -04001061 .p_arglen = RPCB_getaddrargs_sz,
1062 .p_replen = RPCB_setres_sz,
1063 .p_statidx = RPCBPROC_SET,
1064 .p_timer = 0,
1065 .p_name = "SET",
1066 },
1067 [RPCBPROC_UNSET] = {
1068 .p_proc = RPCBPROC_UNSET,
Chuck Lever9f06c712010-12-14 14:59:18 +00001069 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
Chuck Leverbf269552010-12-14 14:59:29 +00001070 .p_decode = (kxdrdproc_t)rpcb_dec_set,
Chuck Leverf8b761e2009-08-09 15:09:44 -04001071 .p_arglen = RPCB_getaddrargs_sz,
1072 .p_replen = RPCB_setres_sz,
1073 .p_statidx = RPCBPROC_UNSET,
1074 .p_timer = 0,
1075 .p_name = "UNSET",
1076 },
1077 [RPCBPROC_GETADDR] = {
1078 .p_proc = RPCBPROC_GETADDR,
Chuck Lever9f06c712010-12-14 14:59:18 +00001079 .p_encode = (kxdreproc_t)rpcb_enc_getaddr,
Chuck Leverbf269552010-12-14 14:59:29 +00001080 .p_decode = (kxdrdproc_t)rpcb_dec_getaddr,
Chuck Leverf8b761e2009-08-09 15:09:44 -04001081 .p_arglen = RPCB_getaddrargs_sz,
1082 .p_replen = RPCB_getaddrres_sz,
1083 .p_statidx = RPCBPROC_GETADDR,
1084 .p_timer = 0,
1085 .p_name = "GETADDR",
1086 },
Chuck Levera5090502007-03-29 16:48:04 -04001087};
1088
Trond Myklebusta613fa12012-01-20 13:53:56 -05001089static const struct rpcb_info rpcb_next_version[] = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001090 {
1091 .rpc_vers = RPCBVERS_2,
1092 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
1093 },
1094 {
1095 .rpc_proc = NULL,
1096 },
Chuck Levera5090502007-03-29 16:48:04 -04001097};
1098
Trond Myklebusta613fa12012-01-20 13:53:56 -05001099static const struct rpcb_info rpcb_next_version6[] = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001100 {
1101 .rpc_vers = RPCBVERS_4,
Chuck Lever88424132008-06-25 17:24:47 -04001102 .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR],
Chuck Leverfc200e72008-06-25 17:24:31 -04001103 },
1104 {
1105 .rpc_vers = RPCBVERS_3,
1106 .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR],
1107 },
Chuck Leverfc200e72008-06-25 17:24:31 -04001108 {
1109 .rpc_proc = NULL,
1110 },
Chuck Leverd5b64432007-08-06 11:57:18 -04001111};
1112
Trond Myklebusta613fa12012-01-20 13:53:56 -05001113static const struct rpc_version rpcb_version2 = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001114 .number = RPCBVERS_2,
Chuck Lever1ac7c232010-12-14 14:59:09 +00001115 .nrprocs = ARRAY_SIZE(rpcb_procedures2),
Chuck Levera5090502007-03-29 16:48:04 -04001116 .procs = rpcb_procedures2
1117};
1118
Trond Myklebusta613fa12012-01-20 13:53:56 -05001119static const struct rpc_version rpcb_version3 = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001120 .number = RPCBVERS_3,
Chuck Lever1ac7c232010-12-14 14:59:09 +00001121 .nrprocs = ARRAY_SIZE(rpcb_procedures3),
Chuck Levera5090502007-03-29 16:48:04 -04001122 .procs = rpcb_procedures3
1123};
1124
Trond Myklebusta613fa12012-01-20 13:53:56 -05001125static const struct rpc_version rpcb_version4 = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001126 .number = RPCBVERS_4,
Chuck Lever1ac7c232010-12-14 14:59:09 +00001127 .nrprocs = ARRAY_SIZE(rpcb_procedures4),
Chuck Levera5090502007-03-29 16:48:04 -04001128 .procs = rpcb_procedures4
1129};
1130
Trond Myklebusta613fa12012-01-20 13:53:56 -05001131static const struct rpc_version *rpcb_version[] = {
Chuck Levera5090502007-03-29 16:48:04 -04001132 NULL,
1133 NULL,
1134 &rpcb_version2,
1135 &rpcb_version3,
1136 &rpcb_version4
1137};
1138
1139static struct rpc_stat rpcb_stats;
1140
Trond Myklebusta613fa12012-01-20 13:53:56 -05001141static const struct rpc_program rpcb_program = {
Chuck Levera5090502007-03-29 16:48:04 -04001142 .name = "rpcbind",
1143 .number = RPCBIND_PROGRAM,
1144 .nrvers = ARRAY_SIZE(rpcb_version),
1145 .version = rpcb_version,
1146 .stats = &rpcb_stats,
1147};