blob: 3e3772d8eb921ce00af629ad11627ad3677ea613 [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>
Chuck Lever9d548b92008-09-15 16:27:30 -050024#include <net/ipv6.h>
Chuck Levera5090502007-03-29 16:48:04 -040025
26#include <linux/sunrpc/clnt.h>
27#include <linux/sunrpc/sched.h>
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -040028#include <linux/sunrpc/xprtsock.h>
Chuck Levera5090502007-03-29 16:48:04 -040029
30#ifdef RPC_DEBUG
31# define RPCDBG_FACILITY RPCDBG_BIND
32#endif
33
34#define RPCBIND_PROGRAM (100000u)
35#define RPCBIND_PORT (111u)
36
Chuck Leverfc200e72008-06-25 17:24:31 -040037#define RPCBVERS_2 (2u)
38#define RPCBVERS_3 (3u)
39#define RPCBVERS_4 (4u)
40
Chuck Levera5090502007-03-29 16:48:04 -040041enum {
42 RPCBPROC_NULL,
43 RPCBPROC_SET,
44 RPCBPROC_UNSET,
45 RPCBPROC_GETPORT,
46 RPCBPROC_GETADDR = 3, /* alias for GETPORT */
47 RPCBPROC_DUMP,
48 RPCBPROC_CALLIT,
49 RPCBPROC_BCAST = 5, /* alias for CALLIT */
50 RPCBPROC_GETTIME,
51 RPCBPROC_UADDR2TADDR,
52 RPCBPROC_TADDR2UADDR,
53 RPCBPROC_GETVERSADDR,
54 RPCBPROC_INDIRECT,
55 RPCBPROC_GETADDRLIST,
56 RPCBPROC_GETSTAT,
57};
58
59#define RPCB_HIGHPROC_2 RPCBPROC_CALLIT
60#define RPCB_HIGHPROC_3 RPCBPROC_TADDR2UADDR
61#define RPCB_HIGHPROC_4 RPCBPROC_GETSTAT
62
63/*
Chuck Levera5090502007-03-29 16:48:04 -040064 * r_owner
65 *
66 * The "owner" is allowed to unset a service in the rpcbind database.
Chuck Lever126e4bc2009-03-18 20:47:14 -040067 *
68 * For AF_LOCAL SET/UNSET requests, rpcbind treats this string as a
69 * UID which it maps to a local user name via a password lookup.
70 * In all other cases it is ignored.
71 *
72 * For SET/UNSET requests, user space provides a value, even for
73 * network requests, and GETADDR uses an empty string. We follow
74 * those precedents here.
Chuck Levera5090502007-03-29 16:48:04 -040075 */
Chuck Lever126e4bc2009-03-18 20:47:14 -040076#define RPCB_OWNER_STRING "0"
Chuck Levera5090502007-03-29 16:48:04 -040077#define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
78
Chuck Lever0b10bf52009-08-09 15:09:33 -040079/*
80 * XDR data type sizes
81 */
82#define RPCB_program_sz (1)
83#define RPCB_version_sz (1)
84#define RPCB_protocol_sz (1)
85#define RPCB_port_sz (1)
86#define RPCB_boolean_sz (1)
87
88#define RPCB_netid_sz (1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
89#define RPCB_addr_sz (1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
90#define RPCB_ownerstring_sz (1 + XDR_QUADLEN(RPCB_MAXOWNERLEN))
91
92/*
93 * XDR argument and result sizes
94 */
95#define RPCB_mappingargs_sz (RPCB_program_sz + RPCB_version_sz + \
96 RPCB_protocol_sz + RPCB_port_sz)
97#define RPCB_getaddrargs_sz (RPCB_program_sz + RPCB_version_sz + \
98 RPCB_netid_sz + RPCB_addr_sz + \
99 RPCB_ownerstring_sz)
100
101#define RPCB_getportres_sz RPCB_port_sz
102#define RPCB_setres_sz RPCB_boolean_sz
103
104/*
105 * Note that RFC 1833 does not put any size restrictions on the
106 * address string returned by the remote rpcbind database.
107 */
108#define RPCB_getaddrres_sz RPCB_addr_sz
109
Chuck Levera5090502007-03-29 16:48:04 -0400110static void rpcb_getport_done(struct rpc_task *, void *);
Trond Myklebust381ba742008-07-07 12:18:53 -0400111static void rpcb_map_release(void *data);
Adrian Bunk7f4adef2007-06-13 01:03:13 +0200112static struct rpc_program rpcb_program;
Chuck Levera5090502007-03-29 16:48:04 -0400113
Chuck Leverc5266112009-12-03 15:58:56 -0500114static struct rpc_clnt * rpcb_local_clnt;
115static struct rpc_clnt * rpcb_local_clnt4;
116
Chuck Levera5090502007-03-29 16:48:04 -0400117struct 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
140static struct rpcb_info rpcb_next_version[];
141static 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
Chuck Levercc5598b2008-07-14 16:03:27 -0400164static const struct sockaddr_in rpcb_inaddr_loopback = {
165 .sin_family = AF_INET,
166 .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
167 .sin_port = htons(RPCBIND_PORT),
168};
169
Chuck Leverc5266112009-12-03 15:58:56 -0500170static DEFINE_MUTEX(rpcb_create_local_mutex);
171
172/*
173 * Returns zero on success, otherwise a negative errno value
174 * is returned.
175 */
176static int rpcb_create_local(void)
Chuck Levercc5598b2008-07-14 16:03:27 -0400177{
178 struct rpc_create_args args = {
Chuck Lever2a76b3b2009-12-03 15:58:56 -0500179 .protocol = XPRT_TRANSPORT_TCP,
Chuck Lever5a462112009-12-03 15:58:56 -0500180 .address = (struct sockaddr *)&rpcb_inaddr_loopback,
181 .addrsize = sizeof(rpcb_inaddr_loopback),
Chuck Levercc5598b2008-07-14 16:03:27 -0400182 .servername = "localhost",
183 .program = &rpcb_program,
Chuck Leverc5266112009-12-03 15:58:56 -0500184 .version = RPCBVERS_2,
Chuck Levercc5598b2008-07-14 16:03:27 -0400185 .authflavor = RPC_AUTH_UNIX,
186 .flags = RPC_CLNT_CREATE_NOPING,
187 };
Chuck Leverc5266112009-12-03 15:58:56 -0500188 struct rpc_clnt *clnt, *clnt4;
189 int result = 0;
Chuck Levercc5598b2008-07-14 16:03:27 -0400190
Chuck Leverc5266112009-12-03 15:58:56 -0500191 if (rpcb_local_clnt)
192 return result;
193
194 mutex_lock(&rpcb_create_local_mutex);
195 if (rpcb_local_clnt)
196 goto out;
197
198 clnt = rpc_create(&args);
199 if (IS_ERR(clnt)) {
200 dprintk("RPC: failed to create local rpcbind "
201 "client (errno %ld).\n", PTR_ERR(clnt));
202 result = -PTR_ERR(clnt);
203 goto out;
204 }
205
206 /*
207 * This results in an RPC ping. On systems running portmapper,
208 * the v4 ping will fail. Proceed anyway, but disallow rpcb
209 * v4 upcalls.
210 */
211 clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
212 if (IS_ERR(clnt4)) {
213 dprintk("RPC: failed to create local rpcbind v4 "
214 "cleint (errno %ld).\n", PTR_ERR(clnt4));
215 clnt4 = NULL;
216 }
217
218 rpcb_local_clnt = clnt;
219 rpcb_local_clnt4 = clnt4;
220
221out:
222 mutex_unlock(&rpcb_create_local_mutex);
223 return result;
Chuck Levercc5598b2008-07-14 16:03:27 -0400224}
225
Chuck Levera5090502007-03-29 16:48:04 -0400226static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
Chuck Lever423d8b02008-07-14 16:03:28 -0400227 size_t salen, int proto, u32 version)
Chuck Levera5090502007-03-29 16:48:04 -0400228{
229 struct rpc_create_args args = {
230 .protocol = proto,
231 .address = srvaddr,
Chuck Lever9f6ad262007-12-10 14:56:31 -0500232 .addrsize = salen,
Chuck Levera5090502007-03-29 16:48:04 -0400233 .servername = hostname,
234 .program = &rpcb_program,
235 .version = version,
236 .authflavor = RPC_AUTH_UNIX,
Chuck Lever423d8b02008-07-14 16:03:28 -0400237 .flags = (RPC_CLNT_CREATE_NOPING |
238 RPC_CLNT_CREATE_NONPRIVPORT),
Chuck Levera5090502007-03-29 16:48:04 -0400239 };
240
Chuck Leverd5b64432007-08-06 11:57:18 -0400241 switch (srvaddr->sa_family) {
242 case AF_INET:
243 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
244 break;
245 case AF_INET6:
246 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
247 break;
248 default:
249 return NULL;
250 }
251
Chuck Levera5090502007-03-29 16:48:04 -0400252 return rpc_create(&args);
253}
254
Chuck Leverc5266112009-12-03 15:58:56 -0500255static int rpcb_register_call(struct rpc_clnt *clnt, struct rpc_message *msg)
Chuck Leverbabe80e2008-07-14 16:03:29 -0400256{
Chuck Lever14aeb212008-08-18 19:34:00 -0400257 int result, error = 0;
Chuck Leverbabe80e2008-07-14 16:03:29 -0400258
Chuck Lever14aeb212008-08-18 19:34:00 -0400259 msg->rpc_resp = &result;
Chuck Leverbabe80e2008-07-14 16:03:29 -0400260
Chuck Lever2a76b3b2009-12-03 15:58:56 -0500261 error = rpc_call_sync(clnt, msg, RPC_TASK_SOFTCONN);
Chuck Lever14aeb212008-08-18 19:34:00 -0400262 if (error < 0) {
Chuck Lever363f7242009-03-18 20:47:44 -0400263 dprintk("RPC: failed to contact local rpcbind "
Chuck Leverbabe80e2008-07-14 16:03:29 -0400264 "server (errno %d).\n", -error);
Chuck Lever14aeb212008-08-18 19:34:00 -0400265 return error;
266 }
Chuck Leverbabe80e2008-07-14 16:03:29 -0400267
Chuck Leverdb820d62008-09-25 11:57:05 -0400268 if (!result)
Chuck Lever14aeb212008-08-18 19:34:00 -0400269 return -EACCES;
Chuck Lever14aeb212008-08-18 19:34:00 -0400270 return 0;
Chuck Leverbabe80e2008-07-14 16:03:29 -0400271}
272
Chuck Levera5090502007-03-29 16:48:04 -0400273/**
274 * rpcb_register - set or unset a port registration with the local rpcbind svc
275 * @prog: RPC program number to bind
276 * @vers: RPC version number to bind
Chuck Leverc2e1b092008-07-14 16:03:30 -0400277 * @prot: transport protocol to register
Chuck Levera5090502007-03-29 16:48:04 -0400278 * @port: port value to register
Chuck Lever14aeb212008-08-18 19:34:00 -0400279 *
280 * Returns zero if the registration request was dispatched successfully
281 * and the rpcbind daemon returned success. Otherwise, returns an errno
282 * value that reflects the nature of the error (request could not be
283 * dispatched, timed out, or rpcbind returned an error).
Chuck Levera5090502007-03-29 16:48:04 -0400284 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400285 * RPC services invoke this function to advertise their contact
286 * information via the system's rpcbind daemon. RPC services
287 * invoke this function once for each [program, version, transport]
288 * tuple they wish to advertise.
Chuck Levera5090502007-03-29 16:48:04 -0400289 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400290 * Callers may also unregister RPC services that are no longer
291 * available by setting the passed-in port to zero. This removes
292 * all registered transports for [program, version] from the local
293 * rpcbind database.
294 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400295 * This function uses rpcbind protocol version 2 to contact the
296 * local rpcbind daemon.
297 *
298 * Registration works over both AF_INET and AF_INET6, and services
299 * registered via this function are advertised as available for any
300 * address. If the local rpcbind daemon is listening on AF_INET6,
301 * services registered via this function will be advertised on
302 * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6
303 * addresses).
Chuck Levera5090502007-03-29 16:48:04 -0400304 */
Chuck Lever14aeb212008-08-18 19:34:00 -0400305int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
Chuck Levera5090502007-03-29 16:48:04 -0400306{
Chuck Levera5090502007-03-29 16:48:04 -0400307 struct rpcbind_args map = {
308 .r_prog = prog,
309 .r_vers = vers,
310 .r_prot = prot,
311 .r_port = port,
312 };
313 struct rpc_message msg = {
Chuck Levera5090502007-03-29 16:48:04 -0400314 .rpc_argp = &map,
Chuck Levera5090502007-03-29 16:48:04 -0400315 };
Chuck Leverc5266112009-12-03 15:58:56 -0500316 int error;
317
318 error = rpcb_create_local();
319 if (error)
320 return error;
Chuck Levera5090502007-03-29 16:48:04 -0400321
322 dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
323 "rpcbind\n", (port ? "" : "un"),
324 prog, vers, prot, port);
325
Chuck Leverbabe80e2008-07-14 16:03:29 -0400326 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET];
327 if (port)
328 msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET];
329
Chuck Leverc5266112009-12-03 15:58:56 -0500330 return rpcb_register_call(rpcb_local_clnt, &msg);
Chuck Levera5090502007-03-29 16:48:04 -0400331}
332
Chuck Leverc2e1b092008-07-14 16:03:30 -0400333/*
334 * Fill in AF_INET family-specific arguments to register
335 */
Chuck Lever1673d0d2009-03-18 20:47:21 -0400336static int rpcb_register_inet4(const struct sockaddr *sap,
337 struct rpc_message *msg)
Chuck Leverc2e1b092008-07-14 16:03:30 -0400338{
Chuck Lever3aba4552009-03-18 20:47:06 -0400339 const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400340 struct rpcbind_args *map = msg->rpc_argp;
Chuck Lever3aba4552009-03-18 20:47:06 -0400341 unsigned short port = ntohs(sin->sin_port);
Chuck Leverba809132009-08-09 15:09:35 -0400342 int result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400343
Chuck Leverba809132009-08-09 15:09:35 -0400344 map->r_addr = rpc_sockaddr2uaddr(sap);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400345
346 dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
347 "local rpcbind\n", (port ? "" : "un"),
348 map->r_prog, map->r_vers,
349 map->r_addr, map->r_netid);
350
351 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
352 if (port)
353 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
354
Chuck Leverc5266112009-12-03 15:58:56 -0500355 result = rpcb_register_call(rpcb_local_clnt4, msg);
Chuck Leverba809132009-08-09 15:09:35 -0400356 kfree(map->r_addr);
357 return result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400358}
359
360/*
361 * Fill in AF_INET6 family-specific arguments to register
362 */
Chuck Lever1673d0d2009-03-18 20:47:21 -0400363static int rpcb_register_inet6(const struct sockaddr *sap,
364 struct rpc_message *msg)
Chuck Leverc2e1b092008-07-14 16:03:30 -0400365{
Chuck Lever3aba4552009-03-18 20:47:06 -0400366 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400367 struct rpcbind_args *map = msg->rpc_argp;
Chuck Lever3aba4552009-03-18 20:47:06 -0400368 unsigned short port = ntohs(sin6->sin6_port);
Chuck Leverba809132009-08-09 15:09:35 -0400369 int result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400370
Chuck Leverba809132009-08-09 15:09:35 -0400371 map->r_addr = rpc_sockaddr2uaddr(sap);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400372
373 dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
374 "local rpcbind\n", (port ? "" : "un"),
375 map->r_prog, map->r_vers,
376 map->r_addr, map->r_netid);
377
378 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
379 if (port)
380 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
381
Chuck Leverc5266112009-12-03 15:58:56 -0500382 result = rpcb_register_call(rpcb_local_clnt4, msg);
Chuck Leverba809132009-08-09 15:09:35 -0400383 kfree(map->r_addr);
384 return result;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400385}
386
Chuck Lever1673d0d2009-03-18 20:47:21 -0400387static int rpcb_unregister_all_protofamilies(struct rpc_message *msg)
388{
389 struct rpcbind_args *map = msg->rpc_argp;
390
391 dprintk("RPC: unregistering [%u, %u, '%s'] with "
392 "local rpcbind\n",
393 map->r_prog, map->r_vers, map->r_netid);
394
395 map->r_addr = "";
396 msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
397
Chuck Leverc5266112009-12-03 15:58:56 -0500398 return rpcb_register_call(rpcb_local_clnt4, msg);
Chuck Lever1673d0d2009-03-18 20:47:21 -0400399}
400
Chuck Leverc2e1b092008-07-14 16:03:30 -0400401/**
402 * rpcb_v4_register - set or unset a port registration with the local rpcbind
403 * @program: RPC program number of service to (un)register
404 * @version: RPC version number of service to (un)register
405 * @address: address family, IP address, and port to (un)register
406 * @netid: netid of transport protocol to (un)register
Chuck Lever14aeb212008-08-18 19:34:00 -0400407 *
408 * Returns zero if the registration request was dispatched successfully
409 * and the rpcbind daemon returned success. Otherwise, returns an errno
410 * value that reflects the nature of the error (request could not be
411 * dispatched, timed out, or rpcbind returned an error).
Chuck Leverc2e1b092008-07-14 16:03:30 -0400412 *
413 * RPC services invoke this function to advertise their contact
414 * information via the system's rpcbind daemon. RPC services
415 * invoke this function once for each [program, version, address,
416 * netid] tuple they wish to advertise.
417 *
Chuck Lever1673d0d2009-03-18 20:47:21 -0400418 * Callers may also unregister RPC services that are registered at a
419 * specific address by setting the port number in @address to zero.
420 * They may unregister all registered protocol families at once for
421 * a service by passing a NULL @address argument. If @netid is ""
422 * then all netids for [program, version, address] are unregistered.
Chuck Leverc2e1b092008-07-14 16:03:30 -0400423 *
Chuck Leverc2e1b092008-07-14 16:03:30 -0400424 * This function uses rpcbind protocol version 4 to contact the
425 * local rpcbind daemon. The local rpcbind daemon must support
426 * version 4 of the rpcbind protocol in order for these functions
427 * to register a service successfully.
428 *
429 * Supported netids include "udp" and "tcp" for UDP and TCP over
430 * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6,
431 * respectively.
432 *
433 * The contents of @address determine the address family and the
434 * port to be registered. The usual practice is to pass INADDR_ANY
435 * as the raw address, but specifying a non-zero address is also
436 * supported by this API if the caller wishes to advertise an RPC
437 * service on a specific network interface.
438 *
439 * Note that passing in INADDR_ANY does not create the same service
440 * registration as IN6ADDR_ANY. The former advertises an RPC
441 * service on any IPv4 address, but not on IPv6. The latter
442 * advertises the service on all IPv4 and IPv6 addresses.
443 */
444int rpcb_v4_register(const u32 program, const u32 version,
Chuck Lever14aeb212008-08-18 19:34:00 -0400445 const struct sockaddr *address, const char *netid)
Chuck Leverc2e1b092008-07-14 16:03:30 -0400446{
447 struct rpcbind_args map = {
448 .r_prog = program,
449 .r_vers = version,
450 .r_netid = netid,
451 .r_owner = RPCB_OWNER_STRING,
452 };
453 struct rpc_message msg = {
454 .rpc_argp = &map,
Chuck Leverc2e1b092008-07-14 16:03:30 -0400455 };
Chuck Leverc5266112009-12-03 15:58:56 -0500456 int error;
457
458 error = rpcb_create_local();
459 if (error)
460 return error;
461 if (rpcb_local_clnt4 == NULL)
462 return -EPROTONOSUPPORT;
Chuck Leverc2e1b092008-07-14 16:03:30 -0400463
Chuck Lever1673d0d2009-03-18 20:47:21 -0400464 if (address == NULL)
465 return rpcb_unregister_all_protofamilies(&msg);
466
Chuck Leverc2e1b092008-07-14 16:03:30 -0400467 switch (address->sa_family) {
468 case AF_INET:
Chuck Lever1673d0d2009-03-18 20:47:21 -0400469 return rpcb_register_inet4(address, &msg);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400470 case AF_INET6:
Chuck Lever1673d0d2009-03-18 20:47:21 -0400471 return rpcb_register_inet6(address, &msg);
Chuck Leverc2e1b092008-07-14 16:03:30 -0400472 }
473
474 return -EAFNOSUPPORT;
475}
476
Chuck Levera5090502007-03-29 16:48:04 -0400477/**
Chuck Levercce63cd2007-07-01 12:13:12 -0400478 * rpcb_getport_sync - obtain the port for an RPC service on a given host
Chuck Levera5090502007-03-29 16:48:04 -0400479 * @sin: address of remote peer
480 * @prog: RPC program number to bind
481 * @vers: RPC version number to bind
482 * @prot: transport protocol to use to make this request
483 *
Chuck Lever67d60212008-01-14 15:12:01 -0500484 * Return value is the requested advertised port number,
485 * or a negative errno value.
486 *
Chuck Levera5090502007-03-29 16:48:04 -0400487 * Called from outside the RPC client in a synchronous task context.
Chuck Levercce63cd2007-07-01 12:13:12 -0400488 * Uses default timeout parameters specified by underlying transport.
Chuck Levera5090502007-03-29 16:48:04 -0400489 *
Chuck Lever67d60212008-01-14 15:12:01 -0500490 * XXX: Needs to support IPv6
Chuck Levera5090502007-03-29 16:48:04 -0400491 */
Chuck Leverf1ec08c2008-01-14 15:11:53 -0500492int rpcb_getport_sync(struct sockaddr_in *sin, u32 prog, u32 vers, int prot)
Chuck Levera5090502007-03-29 16:48:04 -0400493{
494 struct rpcbind_args map = {
495 .r_prog = prog,
496 .r_vers = vers,
497 .r_prot = prot,
498 .r_port = 0,
499 };
500 struct rpc_message msg = {
501 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
502 .rpc_argp = &map,
Chuck Leverc0c077d2009-08-09 15:09:43 -0400503 .rpc_resp = &map,
Chuck Levera5090502007-03-29 16:48:04 -0400504 };
505 struct rpc_clnt *rpcb_clnt;
Chuck Levera5090502007-03-29 16:48:04 -0400506 int status;
507
Harvey Harrison21454aa2008-10-31 00:54:56 -0700508 dprintk("RPC: %s(%pI4, %u, %u, %d)\n",
509 __func__, &sin->sin_addr.s_addr, prog, vers, prot);
Chuck Levera5090502007-03-29 16:48:04 -0400510
Chuck Leverb91e1012008-01-14 15:11:46 -0500511 rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin,
Chuck Lever423d8b02008-07-14 16:03:28 -0400512 sizeof(*sin), prot, RPCBVERS_2);
Chuck Levera5090502007-03-29 16:48:04 -0400513 if (IS_ERR(rpcb_clnt))
514 return PTR_ERR(rpcb_clnt);
515
516 status = rpc_call_sync(rpcb_clnt, &msg, 0);
Trond Myklebust90c57552007-06-09 19:49:36 -0400517 rpc_shutdown_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400518
519 if (status >= 0) {
520 if (map.r_port != 0)
521 return map.r_port;
522 status = -EACCES;
523 }
524 return status;
525}
Chuck Levercce63cd2007-07-01 12:13:12 -0400526EXPORT_SYMBOL_GPL(rpcb_getport_sync);
Chuck Levera5090502007-03-29 16:48:04 -0400527
Trond Myklebust803a9062008-07-01 15:20:55 -0400528static 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 -0400529{
530 struct rpc_message msg = {
Trond Myklebust803a9062008-07-01 15:20:55 -0400531 .rpc_proc = proc,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400532 .rpc_argp = map,
Chuck Leverc0c077d2009-08-09 15:09:43 -0400533 .rpc_resp = map,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400534 };
535 struct rpc_task_setup task_setup_data = {
536 .rpc_client = rpcb_clnt,
537 .rpc_message = &msg,
538 .callback_ops = &rpcb_getport_ops,
539 .callback_data = map,
Chuck Lever012da152009-12-03 15:58:56 -0500540 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400541 };
542
543 return rpc_run_task(&task_setup_data);
544}
545
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400546/*
547 * In the case where rpc clients have been cloned, we want to make
548 * sure that we use the program number/version etc of the actual
549 * owner of the xprt. To do so, we walk back up the tree of parents
550 * to find whoever created the transport and/or whoever has the
551 * autobind flag set.
552 */
553static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt)
554{
555 struct rpc_clnt *parent = clnt->cl_parent;
556
557 while (parent != clnt) {
558 if (parent->cl_xprt != clnt->cl_xprt)
559 break;
560 if (clnt->cl_autobind)
561 break;
562 clnt = parent;
563 parent = parent->cl_parent;
564 }
565 return clnt;
566}
567
Chuck Levera5090502007-03-29 16:48:04 -0400568/**
Chuck Lever45160d62007-07-01 12:13:17 -0400569 * rpcb_getport_async - obtain the port for a given RPC service on a given host
Chuck Levera5090502007-03-29 16:48:04 -0400570 * @task: task that is waiting for portmapper request
571 *
572 * This one can be called for an ongoing RPC request, and can be used in
573 * an async (rpciod) context.
574 */
Chuck Lever45160d62007-07-01 12:13:17 -0400575void rpcb_getport_async(struct rpc_task *task)
Chuck Levera5090502007-03-29 16:48:04 -0400576{
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400577 struct rpc_clnt *clnt;
Trond Myklebust803a9062008-07-01 15:20:55 -0400578 struct rpc_procinfo *proc;
Chuck Lever0a48f5d2007-12-10 14:56:38 -0500579 u32 bind_version;
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400580 struct rpc_xprt *xprt;
Chuck Levera5090502007-03-29 16:48:04 -0400581 struct rpc_clnt *rpcb_clnt;
582 static struct rpcbind_args *map;
583 struct rpc_task *child;
Chuck Lever9f6ad262007-12-10 14:56:31 -0500584 struct sockaddr_storage addr;
585 struct sockaddr *sap = (struct sockaddr *)&addr;
586 size_t salen;
Chuck Levera5090502007-03-29 16:48:04 -0400587 int status;
588
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400589 clnt = rpcb_find_transport_owner(task->tk_client);
590 xprt = clnt->cl_xprt;
591
Chuck Lever45160d62007-07-01 12:13:17 -0400592 dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800593 task->tk_pid, __func__,
Chuck Lever45160d62007-07-01 12:13:17 -0400594 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
Chuck Levera5090502007-03-29 16:48:04 -0400595
Trond Myklebust381ba742008-07-07 12:18:53 -0400596 /* Put self on the wait queue to ensure we get notified if
597 * some other task is already attempting to bind the port */
598 rpc_sleep_on(&xprt->binding, task, NULL);
599
Chuck Levera5090502007-03-29 16:48:04 -0400600 if (xprt_test_and_set_binding(xprt)) {
Chuck Lever45160d62007-07-01 12:13:17 -0400601 dprintk("RPC: %5u %s: waiting for another binder\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800602 task->tk_pid, __func__);
Trond Myklebust381ba742008-07-07 12:18:53 -0400603 return;
Chuck Levera5090502007-03-29 16:48:04 -0400604 }
605
Chuck Levera5090502007-03-29 16:48:04 -0400606 /* Someone else may have bound if we slept */
607 if (xprt_bound(xprt)) {
608 status = 0;
Chuck Lever45160d62007-07-01 12:13:17 -0400609 dprintk("RPC: %5u %s: already bound\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800610 task->tk_pid, __func__);
Chuck Levera5090502007-03-29 16:48:04 -0400611 goto bailout_nofree;
612 }
613
Chuck Leverba809132009-08-09 15:09:35 -0400614 /* Parent transport's destination address */
Chuck Lever9f6ad262007-12-10 14:56:31 -0500615 salen = rpc_peeraddr(clnt, sap, sizeof(addr));
Chuck Leverd5b64432007-08-06 11:57:18 -0400616
617 /* Don't ever use rpcbind v2 for AF_INET6 requests */
Chuck Lever9f6ad262007-12-10 14:56:31 -0500618 switch (sap->sa_family) {
Chuck Leverd5b64432007-08-06 11:57:18 -0400619 case AF_INET:
Trond Myklebust803a9062008-07-01 15:20:55 -0400620 proc = rpcb_next_version[xprt->bind_index].rpc_proc;
621 bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
Chuck Leverd5b64432007-08-06 11:57:18 -0400622 break;
623 case AF_INET6:
Trond Myklebust803a9062008-07-01 15:20:55 -0400624 proc = rpcb_next_version6[xprt->bind_index].rpc_proc;
625 bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers;
Chuck Leverd5b64432007-08-06 11:57:18 -0400626 break;
627 default:
628 status = -EAFNOSUPPORT;
629 dprintk("RPC: %5u %s: bad address family\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800630 task->tk_pid, __func__);
Chuck Leverd5b64432007-08-06 11:57:18 -0400631 goto bailout_nofree;
632 }
Trond Myklebust803a9062008-07-01 15:20:55 -0400633 if (proc == NULL) {
Chuck Levera5090502007-03-29 16:48:04 -0400634 xprt->bind_index = 0;
Chuck Lever906462a2007-09-11 18:00:47 -0400635 status = -EPFNOSUPPORT;
Chuck Lever45160d62007-07-01 12:13:17 -0400636 dprintk("RPC: %5u %s: no more getport versions available\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800637 task->tk_pid, __func__);
Chuck Levera5090502007-03-29 16:48:04 -0400638 goto bailout_nofree;
639 }
Chuck Levera5090502007-03-29 16:48:04 -0400640
Chuck Lever45160d62007-07-01 12:13:17 -0400641 dprintk("RPC: %5u %s: trying rpcbind version %u\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800642 task->tk_pid, __func__, bind_version);
Chuck Levera5090502007-03-29 16:48:04 -0400643
Chuck Lever9f6ad262007-12-10 14:56:31 -0500644 rpcb_clnt = rpcb_create(clnt->cl_server, sap, salen, xprt->prot,
Chuck Lever423d8b02008-07-14 16:03:28 -0400645 bind_version);
Chuck Lever143b6c42007-08-16 16:03:31 -0400646 if (IS_ERR(rpcb_clnt)) {
647 status = PTR_ERR(rpcb_clnt);
648 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800649 task->tk_pid, __func__, PTR_ERR(rpcb_clnt));
Chuck Lever143b6c42007-08-16 16:03:31 -0400650 goto bailout_nofree;
651 }
652
Chuck Levera5090502007-03-29 16:48:04 -0400653 map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
654 if (!map) {
655 status = -ENOMEM;
Chuck Lever45160d62007-07-01 12:13:17 -0400656 dprintk("RPC: %5u %s: no memory available\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800657 task->tk_pid, __func__);
Trond Myklebust96165e22008-10-03 16:48:40 -0400658 goto bailout_release_client;
Chuck Levera5090502007-03-29 16:48:04 -0400659 }
660 map->r_prog = clnt->cl_prog;
661 map->r_vers = clnt->cl_vers;
662 map->r_prot = xprt->prot;
663 map->r_port = 0;
664 map->r_xprt = xprt_get(xprt);
Trond Myklebust381ba742008-07-07 12:18:53 -0400665 map->r_status = -EIO;
Chuck Levera5090502007-03-29 16:48:04 -0400666
Chuck Leverba809132009-08-09 15:09:35 -0400667 switch (bind_version) {
668 case RPCBVERS_4:
669 case RPCBVERS_3:
670 map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
671 map->r_addr = rpc_sockaddr2uaddr(sap);
672 map->r_owner = "";
673 break;
674 case RPCBVERS_2:
675 map->r_addr = NULL;
676 break;
677 default:
678 BUG();
679 }
680
Trond Myklebust803a9062008-07-01 15:20:55 -0400681 child = rpcb_call_async(rpcb_clnt, map, proc);
Trond Myklebust4c402b42007-06-14 16:40:32 -0400682 rpc_release_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400683 if (IS_ERR(child)) {
Trond Myklebust0d3a34b2008-07-07 12:18:52 -0400684 /* rpcb_map_release() has freed the arguments */
Chuck Lever45160d62007-07-01 12:13:17 -0400685 dprintk("RPC: %5u %s: rpc_run_task failed\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800686 task->tk_pid, __func__);
Trond Myklebust381ba742008-07-07 12:18:53 -0400687 return;
Chuck Levera5090502007-03-29 16:48:04 -0400688 }
Chuck Levera5090502007-03-29 16:48:04 -0400689
Trond Myklebust9a4bd292008-10-03 16:48:34 -0400690 xprt->stat.bind_count++;
691 rpc_put_task(child);
Chuck Levera5090502007-03-29 16:48:04 -0400692 return;
693
Trond Myklebust96165e22008-10-03 16:48:40 -0400694bailout_release_client:
695 rpc_release_client(rpcb_clnt);
Chuck Levera5090502007-03-29 16:48:04 -0400696bailout_nofree:
697 rpcb_wake_rpcbind_waiters(xprt, status);
Chuck Levera5090502007-03-29 16:48:04 -0400698 task->tk_status = status;
699}
\"Talpey, Thomas\12444802007-09-10 13:45:36 -0400700EXPORT_SYMBOL_GPL(rpcb_getport_async);
Chuck Levera5090502007-03-29 16:48:04 -0400701
702/*
703 * Rpcbind child task calls this callback via tk_exit.
704 */
705static void rpcb_getport_done(struct rpc_task *child, void *data)
706{
707 struct rpcbind_args *map = data;
708 struct rpc_xprt *xprt = map->r_xprt;
709 int status = child->tk_status;
710
Chuck Lever4784cb52007-09-11 18:00:36 -0400711 /* Garbage reply: retry with a lesser rpcbind version */
712 if (status == -EIO)
713 status = -EPROTONOSUPPORT;
714
Chuck Levera5090502007-03-29 16:48:04 -0400715 /* rpcbind server doesn't support this rpcbind protocol version */
716 if (status == -EPROTONOSUPPORT)
717 xprt->bind_index++;
718
719 if (status < 0) {
720 /* rpcbind server not available on remote host? */
721 xprt->ops->set_port(xprt, 0);
722 } else if (map->r_port == 0) {
723 /* Requested RPC service wasn't registered on remote host */
724 xprt->ops->set_port(xprt, 0);
725 status = -EACCES;
726 } else {
727 /* Succeeded */
728 xprt->ops->set_port(xprt, map->r_port);
729 xprt_set_bound(xprt);
730 status = 0;
731 }
732
733 dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
734 child->tk_pid, status, map->r_port);
735
Trond Myklebust381ba742008-07-07 12:18:53 -0400736 map->r_status = status;
Chuck Levera5090502007-03-29 16:48:04 -0400737}
738
Chuck Lever166b88d2008-07-14 16:03:26 -0400739/*
740 * XDR functions for rpcbind
741 */
742
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400743static int rpcb_enc_mapping(struct rpc_rqst *req, __be32 *p,
744 const struct rpcbind_args *rpcb)
745{
746 struct rpc_task *task = req->rq_task;
747 struct xdr_stream xdr;
748
749 dprintk("RPC: %5u encoding PMAP_%s call (%u, %u, %d, %u)\n",
750 task->tk_pid, task->tk_msg.rpc_proc->p_name,
751 rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
752
753 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
754
755 p = xdr_reserve_space(&xdr, sizeof(__be32) * RPCB_mappingargs_sz);
756 if (unlikely(p == NULL))
757 return -EIO;
758
759 *p++ = htonl(rpcb->r_prog);
760 *p++ = htonl(rpcb->r_vers);
761 *p++ = htonl(rpcb->r_prot);
762 *p = htonl(rpcb->r_port);
763
764 return 0;
765}
766
Chuck Leverc0c077d2009-08-09 15:09:43 -0400767static int rpcb_dec_getport(struct rpc_rqst *req, __be32 *p,
768 struct rpcbind_args *rpcb)
769{
770 struct rpc_task *task = req->rq_task;
771 struct xdr_stream xdr;
772 unsigned long port;
773
774 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
775
776 rpcb->r_port = 0;
777
778 p = xdr_inline_decode(&xdr, sizeof(__be32));
779 if (unlikely(p == NULL))
780 return -EIO;
781
782 port = ntohl(*p);
783 dprintk("RPC: %5u PMAP_%s result: %lu\n", task->tk_pid,
784 task->tk_msg.rpc_proc->p_name, port);
785 if (unlikely(port > USHORT_MAX))
786 return -EIO;
787
788 rpcb->r_port = port;
789 return 0;
790}
791
Chuck Lever7ed0ff92009-08-09 15:09:42 -0400792static int rpcb_dec_set(struct rpc_rqst *req, __be32 *p,
793 unsigned int *boolp)
794{
795 struct rpc_task *task = req->rq_task;
796 struct xdr_stream xdr;
797
798 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
799
800 p = xdr_inline_decode(&xdr, sizeof(__be32));
801 if (unlikely(p == NULL))
802 return -EIO;
803
804 *boolp = 0;
805 if (*p)
806 *boolp = 1;
807
808 dprintk("RPC: %5u RPCB_%s call %s\n",
809 task->tk_pid, task->tk_msg.rpc_proc->p_name,
810 (*boolp ? "succeeded" : "failed"));
811 return 0;
812}
813
Chuck Lever6f2c2db2009-08-09 15:09:40 -0400814static int encode_rpcb_string(struct xdr_stream *xdr, const char *string,
815 const u32 maxstrlen)
816{
817 u32 len;
818 __be32 *p;
819
820 if (unlikely(string == NULL))
821 return -EIO;
822 len = strlen(string);
823 if (unlikely(len > maxstrlen))
824 return -EIO;
825
826 p = xdr_reserve_space(xdr, sizeof(__be32) + len);
827 if (unlikely(p == NULL))
828 return -EIO;
829 xdr_encode_opaque(p, string, len);
830
831 return 0;
832}
833
834static int rpcb_enc_getaddr(struct rpc_rqst *req, __be32 *p,
835 const struct rpcbind_args *rpcb)
836{
837 struct rpc_task *task = req->rq_task;
838 struct xdr_stream xdr;
839
840 dprintk("RPC: %5u encoding RPCB_%s call (%u, %u, '%s', '%s')\n",
841 task->tk_pid, task->tk_msg.rpc_proc->p_name,
842 rpcb->r_prog, rpcb->r_vers,
843 rpcb->r_netid, rpcb->r_addr);
844
845 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
846
847 p = xdr_reserve_space(&xdr,
848 sizeof(__be32) * (RPCB_program_sz + RPCB_version_sz));
849 if (unlikely(p == NULL))
850 return -EIO;
851 *p++ = htonl(rpcb->r_prog);
852 *p = htonl(rpcb->r_vers);
853
854 if (encode_rpcb_string(&xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN))
855 return -EIO;
856 if (encode_rpcb_string(&xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN))
857 return -EIO;
858 if (encode_rpcb_string(&xdr, rpcb->r_owner, RPCB_MAXOWNERLEN))
859 return -EIO;
860
861 return 0;
862}
863
Chuck Leverc0c077d2009-08-09 15:09:43 -0400864static int rpcb_dec_getaddr(struct rpc_rqst *req, __be32 *p,
865 struct rpcbind_args *rpcb)
866{
867 struct sockaddr_storage address;
868 struct sockaddr *sap = (struct sockaddr *)&address;
869 struct rpc_task *task = req->rq_task;
870 struct xdr_stream xdr;
871 u32 len;
872
873 rpcb->r_port = 0;
874
875 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
876
877 p = xdr_inline_decode(&xdr, sizeof(__be32));
878 if (unlikely(p == NULL))
879 goto out_fail;
880 len = ntohl(*p);
881
882 /*
883 * If the returned universal address is a null string,
884 * the requested RPC service was not registered.
885 */
886 if (len == 0) {
887 dprintk("RPC: %5u RPCB reply: program not registered\n",
888 task->tk_pid);
889 return 0;
890 }
891
892 if (unlikely(len > RPCBIND_MAXUADDRLEN))
893 goto out_fail;
894
895 p = xdr_inline_decode(&xdr, len);
896 if (unlikely(p == NULL))
897 goto out_fail;
898 dprintk("RPC: %5u RPCB_%s reply: %s\n", task->tk_pid,
899 task->tk_msg.rpc_proc->p_name, (char *)p);
900
901 if (rpc_uaddr2sockaddr((char *)p, len, sap, sizeof(address)) == 0)
902 goto out_fail;
903 rpcb->r_port = rpc_get_port(sap);
904
905 return 0;
906
907out_fail:
908 dprintk("RPC: %5u malformed RPCB_%s reply\n",
909 task->tk_pid, task->tk_msg.rpc_proc->p_name);
910 return -EIO;
911}
912
Chuck Levera5090502007-03-29 16:48:04 -0400913/*
914 * Not all rpcbind procedures described in RFC 1833 are implemented
915 * since the Linux kernel RPC code requires only these.
916 */
Chuck Leverf8b761e2009-08-09 15:09:44 -0400917
Chuck Levera5090502007-03-29 16:48:04 -0400918static struct rpc_procinfo rpcb_procedures2[] = {
Chuck Leverf8b761e2009-08-09 15:09:44 -0400919 [RPCBPROC_SET] = {
920 .p_proc = RPCBPROC_SET,
921 .p_encode = (kxdrproc_t)rpcb_enc_mapping,
922 .p_decode = (kxdrproc_t)rpcb_dec_set,
923 .p_arglen = RPCB_mappingargs_sz,
924 .p_replen = RPCB_setres_sz,
925 .p_statidx = RPCBPROC_SET,
926 .p_timer = 0,
927 .p_name = "SET",
928 },
929 [RPCBPROC_UNSET] = {
930 .p_proc = RPCBPROC_UNSET,
931 .p_encode = (kxdrproc_t)rpcb_enc_mapping,
932 .p_decode = (kxdrproc_t)rpcb_dec_set,
933 .p_arglen = RPCB_mappingargs_sz,
934 .p_replen = RPCB_setres_sz,
935 .p_statidx = RPCBPROC_UNSET,
936 .p_timer = 0,
937 .p_name = "UNSET",
938 },
939 [RPCBPROC_GETPORT] = {
940 .p_proc = RPCBPROC_GETPORT,
941 .p_encode = (kxdrproc_t)rpcb_enc_mapping,
942 .p_decode = (kxdrproc_t)rpcb_dec_getport,
943 .p_arglen = RPCB_mappingargs_sz,
944 .p_replen = RPCB_getportres_sz,
945 .p_statidx = RPCBPROC_GETPORT,
946 .p_timer = 0,
947 .p_name = "GETPORT",
948 },
Chuck Levera5090502007-03-29 16:48:04 -0400949};
950
951static struct rpc_procinfo rpcb_procedures3[] = {
Chuck Leverf8b761e2009-08-09 15:09:44 -0400952 [RPCBPROC_SET] = {
953 .p_proc = RPCBPROC_SET,
954 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
955 .p_decode = (kxdrproc_t)rpcb_dec_set,
956 .p_arglen = RPCB_getaddrargs_sz,
957 .p_replen = RPCB_setres_sz,
958 .p_statidx = RPCBPROC_SET,
959 .p_timer = 0,
960 .p_name = "SET",
961 },
962 [RPCBPROC_UNSET] = {
963 .p_proc = RPCBPROC_UNSET,
964 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
965 .p_decode = (kxdrproc_t)rpcb_dec_set,
966 .p_arglen = RPCB_getaddrargs_sz,
967 .p_replen = RPCB_setres_sz,
968 .p_statidx = RPCBPROC_UNSET,
969 .p_timer = 0,
970 .p_name = "UNSET",
971 },
972 [RPCBPROC_GETADDR] = {
973 .p_proc = RPCBPROC_GETADDR,
974 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
975 .p_decode = (kxdrproc_t)rpcb_dec_getaddr,
976 .p_arglen = RPCB_getaddrargs_sz,
977 .p_replen = RPCB_getaddrres_sz,
978 .p_statidx = RPCBPROC_GETADDR,
979 .p_timer = 0,
980 .p_name = "GETADDR",
981 },
Chuck Levera5090502007-03-29 16:48:04 -0400982};
983
984static struct rpc_procinfo rpcb_procedures4[] = {
Chuck Leverf8b761e2009-08-09 15:09:44 -0400985 [RPCBPROC_SET] = {
986 .p_proc = RPCBPROC_SET,
987 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
988 .p_decode = (kxdrproc_t)rpcb_dec_set,
989 .p_arglen = RPCB_getaddrargs_sz,
990 .p_replen = RPCB_setres_sz,
991 .p_statidx = RPCBPROC_SET,
992 .p_timer = 0,
993 .p_name = "SET",
994 },
995 [RPCBPROC_UNSET] = {
996 .p_proc = RPCBPROC_UNSET,
997 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
998 .p_decode = (kxdrproc_t)rpcb_dec_set,
999 .p_arglen = RPCB_getaddrargs_sz,
1000 .p_replen = RPCB_setres_sz,
1001 .p_statidx = RPCBPROC_UNSET,
1002 .p_timer = 0,
1003 .p_name = "UNSET",
1004 },
1005 [RPCBPROC_GETADDR] = {
1006 .p_proc = RPCBPROC_GETADDR,
1007 .p_encode = (kxdrproc_t)rpcb_enc_getaddr,
1008 .p_decode = (kxdrproc_t)rpcb_dec_getaddr,
1009 .p_arglen = RPCB_getaddrargs_sz,
1010 .p_replen = RPCB_getaddrres_sz,
1011 .p_statidx = RPCBPROC_GETADDR,
1012 .p_timer = 0,
1013 .p_name = "GETADDR",
1014 },
Chuck Levera5090502007-03-29 16:48:04 -04001015};
1016
1017static struct rpcb_info rpcb_next_version[] = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001018 {
1019 .rpc_vers = RPCBVERS_2,
1020 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
1021 },
1022 {
1023 .rpc_proc = NULL,
1024 },
Chuck Levera5090502007-03-29 16:48:04 -04001025};
1026
Chuck Leverd5b64432007-08-06 11:57:18 -04001027static struct rpcb_info rpcb_next_version6[] = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001028 {
1029 .rpc_vers = RPCBVERS_4,
Chuck Lever88424132008-06-25 17:24:47 -04001030 .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR],
Chuck Leverfc200e72008-06-25 17:24:31 -04001031 },
1032 {
1033 .rpc_vers = RPCBVERS_3,
1034 .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR],
1035 },
Chuck Leverfc200e72008-06-25 17:24:31 -04001036 {
1037 .rpc_proc = NULL,
1038 },
Chuck Leverd5b64432007-08-06 11:57:18 -04001039};
1040
Chuck Levera5090502007-03-29 16:48:04 -04001041static struct rpc_version rpcb_version2 = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001042 .number = RPCBVERS_2,
Chuck Levera5090502007-03-29 16:48:04 -04001043 .nrprocs = RPCB_HIGHPROC_2,
1044 .procs = rpcb_procedures2
1045};
1046
1047static struct rpc_version rpcb_version3 = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001048 .number = RPCBVERS_3,
Chuck Levera5090502007-03-29 16:48:04 -04001049 .nrprocs = RPCB_HIGHPROC_3,
1050 .procs = rpcb_procedures3
1051};
1052
1053static struct rpc_version rpcb_version4 = {
Chuck Leverfc200e72008-06-25 17:24:31 -04001054 .number = RPCBVERS_4,
Chuck Levera5090502007-03-29 16:48:04 -04001055 .nrprocs = RPCB_HIGHPROC_4,
1056 .procs = rpcb_procedures4
1057};
1058
1059static struct rpc_version *rpcb_version[] = {
1060 NULL,
1061 NULL,
1062 &rpcb_version2,
1063 &rpcb_version3,
1064 &rpcb_version4
1065};
1066
1067static struct rpc_stat rpcb_stats;
1068
Adrian Bunk7f4adef2007-06-13 01:03:13 +02001069static struct rpc_program rpcb_program = {
Chuck Levera5090502007-03-29 16:48:04 -04001070 .name = "rpcbind",
1071 .number = RPCBIND_PROGRAM,
1072 .nrvers = ARRAY_SIZE(rpcb_version),
1073 .version = rpcb_version,
1074 .stats = &rpcb_stats,
1075};
Chuck Leverc5266112009-12-03 15:58:56 -05001076
1077/**
1078 * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister
1079 *
1080 */
1081void cleanup_rpcb_clnt(void)
1082{
1083 if (rpcb_local_clnt4)
1084 rpc_shutdown_client(rpcb_local_clnt4);
1085 if (rpcb_local_clnt)
1086 rpc_shutdown_client(rpcb_local_clnt);
1087}