Commit | Line | Data |
---|---|---|
a509050b CL |
1 | /* |
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 | ||
cce63cd6 CL |
15 | #include <linux/module.h> |
16 | ||
a509050b CL |
17 | #include <linux/types.h> |
18 | #include <linux/socket.h> | |
7402ab19 | 19 | #include <linux/un.h> |
d5b64430 CL |
20 | #include <linux/in.h> |
21 | #include <linux/in6.h> | |
a509050b CL |
22 | #include <linux/kernel.h> |
23 | #include <linux/errno.h> | |
c526611d | 24 | #include <linux/mutex.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
9d548b9c | 26 | #include <net/ipv6.h> |
a509050b CL |
27 | |
28 | #include <linux/sunrpc/clnt.h> | |
29 | #include <linux/sunrpc/sched.h> | |
0896a725 | 30 | #include <linux/sunrpc/xprtsock.h> |
a509050b | 31 | |
dff02d49 SK |
32 | #include "netns.h" |
33 | ||
a509050b CL |
34 | #ifdef RPC_DEBUG |
35 | # define RPCDBG_FACILITY RPCDBG_BIND | |
36 | #endif | |
37 | ||
7402ab19 CL |
38 | #define RPCBIND_SOCK_PATHNAME "/var/run/rpcbind.sock" |
39 | ||
a509050b CL |
40 | #define RPCBIND_PROGRAM (100000u) |
41 | #define RPCBIND_PORT (111u) | |
42 | ||
fc200e79 CL |
43 | #define RPCBVERS_2 (2u) |
44 | #define RPCBVERS_3 (3u) | |
45 | #define RPCBVERS_4 (4u) | |
46 | ||
a509050b CL |
47 | enum { |
48 | RPCBPROC_NULL, | |
49 | RPCBPROC_SET, | |
50 | RPCBPROC_UNSET, | |
51 | RPCBPROC_GETPORT, | |
52 | RPCBPROC_GETADDR = 3, /* alias for GETPORT */ | |
53 | RPCBPROC_DUMP, | |
54 | RPCBPROC_CALLIT, | |
55 | RPCBPROC_BCAST = 5, /* alias for CALLIT */ | |
56 | RPCBPROC_GETTIME, | |
57 | RPCBPROC_UADDR2TADDR, | |
58 | RPCBPROC_TADDR2UADDR, | |
59 | RPCBPROC_GETVERSADDR, | |
60 | RPCBPROC_INDIRECT, | |
61 | RPCBPROC_GETADDRLIST, | |
62 | RPCBPROC_GETSTAT, | |
63 | }; | |
64 | ||
a509050b CL |
65 | /* |
66 | * r_owner | |
67 | * | |
68 | * The "owner" is allowed to unset a service in the rpcbind database. | |
126e4bc3 CL |
69 | * |
70 | * For AF_LOCAL SET/UNSET requests, rpcbind treats this string as a | |
71 | * UID which it maps to a local user name via a password lookup. | |
72 | * In all other cases it is ignored. | |
73 | * | |
74 | * For SET/UNSET requests, user space provides a value, even for | |
75 | * network requests, and GETADDR uses an empty string. We follow | |
76 | * those precedents here. | |
a509050b | 77 | */ |
126e4bc3 | 78 | #define RPCB_OWNER_STRING "0" |
a509050b CL |
79 | #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING) |
80 | ||
0b10bf5e CL |
81 | /* |
82 | * XDR data type sizes | |
83 | */ | |
84 | #define RPCB_program_sz (1) | |
85 | #define RPCB_version_sz (1) | |
86 | #define RPCB_protocol_sz (1) | |
87 | #define RPCB_port_sz (1) | |
88 | #define RPCB_boolean_sz (1) | |
89 | ||
90 | #define RPCB_netid_sz (1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN)) | |
91 | #define RPCB_addr_sz (1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN)) | |
92 | #define RPCB_ownerstring_sz (1 + XDR_QUADLEN(RPCB_MAXOWNERLEN)) | |
93 | ||
94 | /* | |
95 | * XDR argument and result sizes | |
96 | */ | |
97 | #define RPCB_mappingargs_sz (RPCB_program_sz + RPCB_version_sz + \ | |
98 | RPCB_protocol_sz + RPCB_port_sz) | |
99 | #define RPCB_getaddrargs_sz (RPCB_program_sz + RPCB_version_sz + \ | |
100 | RPCB_netid_sz + RPCB_addr_sz + \ | |
101 | RPCB_ownerstring_sz) | |
102 | ||
103 | #define RPCB_getportres_sz RPCB_port_sz | |
104 | #define RPCB_setres_sz RPCB_boolean_sz | |
105 | ||
106 | /* | |
107 | * Note that RFC 1833 does not put any size restrictions on the | |
108 | * address string returned by the remote rpcbind database. | |
109 | */ | |
110 | #define RPCB_getaddrres_sz RPCB_addr_sz | |
111 | ||
a509050b | 112 | static void rpcb_getport_done(struct rpc_task *, void *); |
381ba74a | 113 | static void rpcb_map_release(void *data); |
a613fa16 | 114 | static const struct rpc_program rpcb_program; |
a509050b CL |
115 | |
116 | struct rpcbind_args { | |
117 | struct rpc_xprt * r_xprt; | |
118 | ||
119 | u32 r_prog; | |
120 | u32 r_vers; | |
121 | u32 r_prot; | |
122 | unsigned short r_port; | |
86d61d86 TM |
123 | const char * r_netid; |
124 | const char * r_addr; | |
125 | const char * r_owner; | |
381ba74a TM |
126 | |
127 | int r_status; | |
a509050b CL |
128 | }; |
129 | ||
130 | static struct rpc_procinfo rpcb_procedures2[]; | |
131 | static struct rpc_procinfo rpcb_procedures3[]; | |
c2e1b09f | 132 | static struct rpc_procinfo rpcb_procedures4[]; |
a509050b | 133 | |
d5b64430 | 134 | struct rpcb_info { |
fc200e79 | 135 | u32 rpc_vers; |
a509050b | 136 | struct rpc_procinfo * rpc_proc; |
d5b64430 CL |
137 | }; |
138 | ||
a613fa16 TM |
139 | static const struct rpcb_info rpcb_next_version[]; |
140 | static const struct rpcb_info rpcb_next_version6[]; | |
a509050b | 141 | |
a509050b | 142 | static const struct rpc_call_ops rpcb_getport_ops = { |
a509050b CL |
143 | .rpc_call_done = rpcb_getport_done, |
144 | .rpc_release = rpcb_map_release, | |
145 | }; | |
146 | ||
147 | static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status) | |
148 | { | |
149 | xprt_clear_binding(xprt); | |
150 | rpc_wake_up_status(&xprt->binding, status); | |
151 | } | |
152 | ||
381ba74a TM |
153 | static void rpcb_map_release(void *data) |
154 | { | |
155 | struct rpcbind_args *map = data; | |
156 | ||
157 | rpcb_wake_rpcbind_waiters(map->r_xprt, map->r_status); | |
158 | xprt_put(map->r_xprt); | |
ba809130 | 159 | kfree(map->r_addr); |
381ba74a TM |
160 | kfree(map); |
161 | } | |
162 | ||
2ea75a10 | 163 | static int rpcb_get_local(struct net *net) |
914edb1b SK |
164 | { |
165 | int cnt; | |
2ea75a10 | 166 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
914edb1b | 167 | |
dff02d49 SK |
168 | spin_lock(&sn->rpcb_clnt_lock); |
169 | if (sn->rpcb_users) | |
170 | sn->rpcb_users++; | |
171 | cnt = sn->rpcb_users; | |
172 | spin_unlock(&sn->rpcb_clnt_lock); | |
914edb1b SK |
173 | |
174 | return cnt; | |
175 | } | |
176 | ||
f7a30c18 | 177 | void rpcb_put_local(struct net *net) |
914edb1b | 178 | { |
f7a30c18 | 179 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
dff02d49 SK |
180 | struct rpc_clnt *clnt = sn->rpcb_local_clnt; |
181 | struct rpc_clnt *clnt4 = sn->rpcb_local_clnt4; | |
9793f7c8 | 182 | int shutdown = 0; |
914edb1b | 183 | |
dff02d49 | 184 | spin_lock(&sn->rpcb_clnt_lock); |
9793f7c8 SK |
185 | if (sn->rpcb_users) { |
186 | if (--sn->rpcb_users == 0) { | |
187 | sn->rpcb_local_clnt = NULL; | |
188 | sn->rpcb_local_clnt4 = NULL; | |
189 | } | |
190 | shutdown = !sn->rpcb_users; | |
914edb1b | 191 | } |
dff02d49 | 192 | spin_unlock(&sn->rpcb_clnt_lock); |
914edb1b SK |
193 | |
194 | if (shutdown) { | |
195 | /* | |
196 | * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister | |
197 | */ | |
198 | if (clnt4) | |
199 | rpc_shutdown_client(clnt4); | |
200 | if (clnt) | |
201 | rpc_shutdown_client(clnt); | |
202 | } | |
203 | } | |
204 | ||
2ea75a10 SK |
205 | static void rpcb_set_local(struct net *net, struct rpc_clnt *clnt, |
206 | struct rpc_clnt *clnt4) | |
914edb1b | 207 | { |
2ea75a10 | 208 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
dff02d49 | 209 | |
914edb1b | 210 | /* Protected by rpcb_create_local_mutex */ |
dff02d49 SK |
211 | sn->rpcb_local_clnt = clnt; |
212 | sn->rpcb_local_clnt4 = clnt4; | |
914edb1b | 213 | smp_wmb(); |
dff02d49 | 214 | sn->rpcb_users = 1; |
914edb1b | 215 | dprintk("RPC: created new rpcb local clients (rpcb_local_clnt: " |
2ea75a10 SK |
216 | "%p, rpcb_local_clnt4: %p) for net %p%s\n", |
217 | sn->rpcb_local_clnt, sn->rpcb_local_clnt4, | |
218 | net, (net == &init_net) ? " (init_net)" : ""); | |
914edb1b SK |
219 | } |
220 | ||
7402ab19 CL |
221 | /* |
222 | * Returns zero on success, otherwise a negative errno value | |
223 | * is returned. | |
224 | */ | |
2ea75a10 | 225 | static int rpcb_create_local_unix(struct net *net) |
7402ab19 CL |
226 | { |
227 | static const struct sockaddr_un rpcb_localaddr_rpcbind = { | |
228 | .sun_family = AF_LOCAL, | |
229 | .sun_path = RPCBIND_SOCK_PATHNAME, | |
230 | }; | |
231 | struct rpc_create_args args = { | |
2ea75a10 | 232 | .net = net, |
7402ab19 CL |
233 | .protocol = XPRT_TRANSPORT_LOCAL, |
234 | .address = (struct sockaddr *)&rpcb_localaddr_rpcbind, | |
235 | .addrsize = sizeof(rpcb_localaddr_rpcbind), | |
236 | .servername = "localhost", | |
237 | .program = &rpcb_program, | |
238 | .version = RPCBVERS_2, | |
239 | .authflavor = RPC_AUTH_NULL, | |
240 | }; | |
241 | struct rpc_clnt *clnt, *clnt4; | |
242 | int result = 0; | |
243 | ||
244 | /* | |
245 | * Because we requested an RPC PING at transport creation time, | |
246 | * this works only if the user space portmapper is rpcbind, and | |
247 | * it's listening on AF_LOCAL on the named socket. | |
248 | */ | |
249 | clnt = rpc_create(&args); | |
250 | if (IS_ERR(clnt)) { | |
251 | dprintk("RPC: failed to create AF_LOCAL rpcbind " | |
252 | "client (errno %ld).\n", PTR_ERR(clnt)); | |
caea33da | 253 | result = PTR_ERR(clnt); |
7402ab19 CL |
254 | goto out; |
255 | } | |
256 | ||
257 | clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4); | |
258 | if (IS_ERR(clnt4)) { | |
259 | dprintk("RPC: failed to bind second program to " | |
260 | "rpcbind v4 client (errno %ld).\n", | |
261 | PTR_ERR(clnt4)); | |
262 | clnt4 = NULL; | |
263 | } | |
264 | ||
2ea75a10 | 265 | rpcb_set_local(net, clnt, clnt4); |
cc5598b7 | 266 | |
7402ab19 CL |
267 | out: |
268 | return result; | |
269 | } | |
c526611d CL |
270 | |
271 | /* | |
272 | * Returns zero on success, otherwise a negative errno value | |
273 | * is returned. | |
274 | */ | |
2ea75a10 | 275 | static int rpcb_create_local_net(struct net *net) |
cc5598b7 | 276 | { |
7402ab19 CL |
277 | static const struct sockaddr_in rpcb_inaddr_loopback = { |
278 | .sin_family = AF_INET, | |
279 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
280 | .sin_port = htons(RPCBIND_PORT), | |
281 | }; | |
cc5598b7 | 282 | struct rpc_create_args args = { |
2ea75a10 | 283 | .net = net, |
2a76b3bf | 284 | .protocol = XPRT_TRANSPORT_TCP, |
5a462115 CL |
285 | .address = (struct sockaddr *)&rpcb_inaddr_loopback, |
286 | .addrsize = sizeof(rpcb_inaddr_loopback), | |
cc5598b7 CL |
287 | .servername = "localhost", |
288 | .program = &rpcb_program, | |
c526611d | 289 | .version = RPCBVERS_2, |
cc5598b7 CL |
290 | .authflavor = RPC_AUTH_UNIX, |
291 | .flags = RPC_CLNT_CREATE_NOPING, | |
292 | }; | |
c526611d CL |
293 | struct rpc_clnt *clnt, *clnt4; |
294 | int result = 0; | |
295 | ||
c526611d CL |
296 | clnt = rpc_create(&args); |
297 | if (IS_ERR(clnt)) { | |
298 | dprintk("RPC: failed to create local rpcbind " | |
299 | "client (errno %ld).\n", PTR_ERR(clnt)); | |
caea33da | 300 | result = PTR_ERR(clnt); |
c526611d CL |
301 | goto out; |
302 | } | |
cc5598b7 | 303 | |
c526611d CL |
304 | /* |
305 | * This results in an RPC ping. On systems running portmapper, | |
306 | * the v4 ping will fail. Proceed anyway, but disallow rpcb | |
307 | * v4 upcalls. | |
308 | */ | |
309 | clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4); | |
310 | if (IS_ERR(clnt4)) { | |
38359352 CL |
311 | dprintk("RPC: failed to bind second program to " |
312 | "rpcbind v4 client (errno %ld).\n", | |
313 | PTR_ERR(clnt4)); | |
c526611d CL |
314 | clnt4 = NULL; |
315 | } | |
316 | ||
2ea75a10 | 317 | rpcb_set_local(net, clnt, clnt4); |
c526611d | 318 | |
7402ab19 CL |
319 | out: |
320 | return result; | |
321 | } | |
322 | ||
323 | /* | |
324 | * Returns zero on success, otherwise a negative errno value | |
325 | * is returned. | |
326 | */ | |
f7a30c18 | 327 | int rpcb_create_local(struct net *net) |
7402ab19 CL |
328 | { |
329 | static DEFINE_MUTEX(rpcb_create_local_mutex); | |
330 | int result = 0; | |
331 | ||
2ea75a10 | 332 | if (rpcb_get_local(net)) |
7402ab19 CL |
333 | return result; |
334 | ||
335 | mutex_lock(&rpcb_create_local_mutex); | |
2ea75a10 | 336 | if (rpcb_get_local(net)) |
7402ab19 CL |
337 | goto out; |
338 | ||
2ea75a10 SK |
339 | if (rpcb_create_local_unix(net) != 0) |
340 | result = rpcb_create_local_net(net); | |
7402ab19 | 341 | |
c526611d CL |
342 | out: |
343 | mutex_unlock(&rpcb_create_local_mutex); | |
344 | return result; | |
cc5598b7 CL |
345 | } |
346 | ||
6eac7d3f | 347 | static struct rpc_clnt *rpcb_create(struct net *net, const char *hostname, |
c2550e07 SK |
348 | struct sockaddr *srvaddr, size_t salen, |
349 | int proto, u32 version) | |
a509050b CL |
350 | { |
351 | struct rpc_create_args args = { | |
c2550e07 | 352 | .net = net, |
a509050b CL |
353 | .protocol = proto, |
354 | .address = srvaddr, | |
9f6ad26d | 355 | .addrsize = salen, |
a509050b CL |
356 | .servername = hostname, |
357 | .program = &rpcb_program, | |
358 | .version = version, | |
359 | .authflavor = RPC_AUTH_UNIX, | |
423d8b06 CL |
360 | .flags = (RPC_CLNT_CREATE_NOPING | |
361 | RPC_CLNT_CREATE_NONPRIVPORT), | |
a509050b CL |
362 | }; |
363 | ||
d5b64430 CL |
364 | switch (srvaddr->sa_family) { |
365 | case AF_INET: | |
366 | ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT); | |
367 | break; | |
368 | case AF_INET6: | |
369 | ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT); | |
370 | break; | |
371 | default: | |
c636b572 | 372 | return ERR_PTR(-EAFNOSUPPORT); |
d5b64430 CL |
373 | } |
374 | ||
a509050b CL |
375 | return rpc_create(&args); |
376 | } | |
377 | ||
c526611d | 378 | static int rpcb_register_call(struct rpc_clnt *clnt, struct rpc_message *msg) |
babe80eb | 379 | { |
14aeb211 | 380 | int result, error = 0; |
babe80eb | 381 | |
14aeb211 | 382 | msg->rpc_resp = &result; |
babe80eb | 383 | |
2a76b3bf | 384 | error = rpc_call_sync(clnt, msg, RPC_TASK_SOFTCONN); |
14aeb211 | 385 | if (error < 0) { |
363f724c | 386 | dprintk("RPC: failed to contact local rpcbind " |
babe80eb | 387 | "server (errno %d).\n", -error); |
14aeb211 CL |
388 | return error; |
389 | } | |
390 | ||
db820d63 | 391 | if (!result) |
14aeb211 | 392 | return -EACCES; |
14aeb211 | 393 | return 0; |
babe80eb CL |
394 | } |
395 | ||
a509050b CL |
396 | /** |
397 | * rpcb_register - set or unset a port registration with the local rpcbind svc | |
bda14606 | 398 | * @net: target network namespace |
a509050b CL |
399 | * @prog: RPC program number to bind |
400 | * @vers: RPC version number to bind | |
c2e1b09f | 401 | * @prot: transport protocol to register |
a509050b | 402 | * @port: port value to register |
14aeb211 CL |
403 | * |
404 | * Returns zero if the registration request was dispatched successfully | |
405 | * and the rpcbind daemon returned success. Otherwise, returns an errno | |
406 | * value that reflects the nature of the error (request could not be | |
407 | * dispatched, timed out, or rpcbind returned an error). | |
c2e1b09f CL |
408 | * |
409 | * RPC services invoke this function to advertise their contact | |
410 | * information via the system's rpcbind daemon. RPC services | |
411 | * invoke this function once for each [program, version, transport] | |
412 | * tuple they wish to advertise. | |
413 | * | |
414 | * Callers may also unregister RPC services that are no longer | |
415 | * available by setting the passed-in port to zero. This removes | |
416 | * all registered transports for [program, version] from the local | |
417 | * rpcbind database. | |
418 | * | |
c2e1b09f CL |
419 | * This function uses rpcbind protocol version 2 to contact the |
420 | * local rpcbind daemon. | |
421 | * | |
422 | * Registration works over both AF_INET and AF_INET6, and services | |
423 | * registered via this function are advertised as available for any | |
424 | * address. If the local rpcbind daemon is listening on AF_INET6, | |
425 | * services registered via this function will be advertised on | |
426 | * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6 | |
427 | * addresses). | |
a509050b | 428 | */ |
977ac315 | 429 | int rpcb_register(struct net *net, u32 prog, u32 vers, int prot, unsigned short port) |
a509050b | 430 | { |
a509050b CL |
431 | struct rpcbind_args map = { |
432 | .r_prog = prog, | |
433 | .r_vers = vers, | |
434 | .r_prot = prot, | |
435 | .r_port = port, | |
436 | }; | |
437 | struct rpc_message msg = { | |
a509050b | 438 | .rpc_argp = &map, |
a509050b | 439 | }; |
977ac315 | 440 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
a509050b CL |
441 | |
442 | dprintk("RPC: %sregistering (%u, %u, %d, %u) with local " | |
443 | "rpcbind\n", (port ? "" : "un"), | |
444 | prog, vers, prot, port); | |
445 | ||
babe80eb CL |
446 | msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET]; |
447 | if (port) | |
448 | msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET]; | |
a509050b | 449 | |
dff02d49 | 450 | return rpcb_register_call(sn->rpcb_local_clnt, &msg); |
a509050b CL |
451 | } |
452 | ||
c2e1b09f CL |
453 | /* |
454 | * Fill in AF_INET family-specific arguments to register | |
455 | */ | |
1a114a66 SK |
456 | static int rpcb_register_inet4(struct sunrpc_net *sn, |
457 | const struct sockaddr *sap, | |
1673d0de | 458 | struct rpc_message *msg) |
c2e1b09f | 459 | { |
3aba4553 | 460 | const struct sockaddr_in *sin = (const struct sockaddr_in *)sap; |
c2e1b09f | 461 | struct rpcbind_args *map = msg->rpc_argp; |
3aba4553 | 462 | unsigned short port = ntohs(sin->sin_port); |
ba809130 | 463 | int result; |
c2e1b09f | 464 | |
d77385f2 | 465 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL); |
c2e1b09f CL |
466 | |
467 | dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with " | |
468 | "local rpcbind\n", (port ? "" : "un"), | |
469 | map->r_prog, map->r_vers, | |
470 | map->r_addr, map->r_netid); | |
471 | ||
472 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; | |
473 | if (port) | |
474 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET]; | |
475 | ||
dff02d49 | 476 | result = rpcb_register_call(sn->rpcb_local_clnt4, msg); |
ba809130 CL |
477 | kfree(map->r_addr); |
478 | return result; | |
c2e1b09f CL |
479 | } |
480 | ||
481 | /* | |
482 | * Fill in AF_INET6 family-specific arguments to register | |
483 | */ | |
1a114a66 SK |
484 | static int rpcb_register_inet6(struct sunrpc_net *sn, |
485 | const struct sockaddr *sap, | |
1673d0de | 486 | struct rpc_message *msg) |
c2e1b09f | 487 | { |
3aba4553 | 488 | const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap; |
c2e1b09f | 489 | struct rpcbind_args *map = msg->rpc_argp; |
3aba4553 | 490 | unsigned short port = ntohs(sin6->sin6_port); |
ba809130 | 491 | int result; |
c2e1b09f | 492 | |
d77385f2 | 493 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL); |
c2e1b09f CL |
494 | |
495 | dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with " | |
496 | "local rpcbind\n", (port ? "" : "un"), | |
497 | map->r_prog, map->r_vers, | |
498 | map->r_addr, map->r_netid); | |
499 | ||
500 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; | |
501 | if (port) | |
502 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET]; | |
503 | ||
dff02d49 | 504 | result = rpcb_register_call(sn->rpcb_local_clnt4, msg); |
ba809130 CL |
505 | kfree(map->r_addr); |
506 | return result; | |
c2e1b09f CL |
507 | } |
508 | ||
1a114a66 SK |
509 | static int rpcb_unregister_all_protofamilies(struct sunrpc_net *sn, |
510 | struct rpc_message *msg) | |
1673d0de CL |
511 | { |
512 | struct rpcbind_args *map = msg->rpc_argp; | |
513 | ||
514 | dprintk("RPC: unregistering [%u, %u, '%s'] with " | |
515 | "local rpcbind\n", | |
516 | map->r_prog, map->r_vers, map->r_netid); | |
517 | ||
518 | map->r_addr = ""; | |
519 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; | |
520 | ||
dff02d49 | 521 | return rpcb_register_call(sn->rpcb_local_clnt4, msg); |
1673d0de CL |
522 | } |
523 | ||
c2e1b09f CL |
524 | /** |
525 | * rpcb_v4_register - set or unset a port registration with the local rpcbind | |
bda14606 | 526 | * @net: target network namespace |
c2e1b09f CL |
527 | * @program: RPC program number of service to (un)register |
528 | * @version: RPC version number of service to (un)register | |
529 | * @address: address family, IP address, and port to (un)register | |
530 | * @netid: netid of transport protocol to (un)register | |
14aeb211 CL |
531 | * |
532 | * Returns zero if the registration request was dispatched successfully | |
533 | * and the rpcbind daemon returned success. Otherwise, returns an errno | |
534 | * value that reflects the nature of the error (request could not be | |
535 | * dispatched, timed out, or rpcbind returned an error). | |
c2e1b09f CL |
536 | * |
537 | * RPC services invoke this function to advertise their contact | |
538 | * information via the system's rpcbind daemon. RPC services | |
539 | * invoke this function once for each [program, version, address, | |
540 | * netid] tuple they wish to advertise. | |
541 | * | |
1673d0de CL |
542 | * Callers may also unregister RPC services that are registered at a |
543 | * specific address by setting the port number in @address to zero. | |
544 | * They may unregister all registered protocol families at once for | |
545 | * a service by passing a NULL @address argument. If @netid is "" | |
546 | * then all netids for [program, version, address] are unregistered. | |
c2e1b09f | 547 | * |
c2e1b09f CL |
548 | * This function uses rpcbind protocol version 4 to contact the |
549 | * local rpcbind daemon. The local rpcbind daemon must support | |
550 | * version 4 of the rpcbind protocol in order for these functions | |
551 | * to register a service successfully. | |
552 | * | |
553 | * Supported netids include "udp" and "tcp" for UDP and TCP over | |
554 | * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6, | |
555 | * respectively. | |
556 | * | |
557 | * The contents of @address determine the address family and the | |
558 | * port to be registered. The usual practice is to pass INADDR_ANY | |
559 | * as the raw address, but specifying a non-zero address is also | |
560 | * supported by this API if the caller wishes to advertise an RPC | |
561 | * service on a specific network interface. | |
562 | * | |
563 | * Note that passing in INADDR_ANY does not create the same service | |
564 | * registration as IN6ADDR_ANY. The former advertises an RPC | |
565 | * service on any IPv4 address, but not on IPv6. The latter | |
566 | * advertises the service on all IPv4 and IPv6 addresses. | |
567 | */ | |
977ac315 | 568 | int rpcb_v4_register(struct net *net, const u32 program, const u32 version, |
14aeb211 | 569 | const struct sockaddr *address, const char *netid) |
c2e1b09f CL |
570 | { |
571 | struct rpcbind_args map = { | |
572 | .r_prog = program, | |
573 | .r_vers = version, | |
574 | .r_netid = netid, | |
575 | .r_owner = RPCB_OWNER_STRING, | |
576 | }; | |
577 | struct rpc_message msg = { | |
578 | .rpc_argp = &map, | |
c2e1b09f | 579 | }; |
977ac315 | 580 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
c526611d | 581 | |
dff02d49 | 582 | if (sn->rpcb_local_clnt4 == NULL) |
c526611d | 583 | return -EPROTONOSUPPORT; |
c2e1b09f | 584 | |
1673d0de | 585 | if (address == NULL) |
1a114a66 | 586 | return rpcb_unregister_all_protofamilies(sn, &msg); |
1673d0de | 587 | |
c2e1b09f CL |
588 | switch (address->sa_family) { |
589 | case AF_INET: | |
1a114a66 | 590 | return rpcb_register_inet4(sn, address, &msg); |
c2e1b09f | 591 | case AF_INET6: |
1a114a66 | 592 | return rpcb_register_inet6(sn, address, &msg); |
c2e1b09f CL |
593 | } |
594 | ||
595 | return -EAFNOSUPPORT; | |
596 | } | |
597 | ||
803a9067 | 598 | static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc) |
5138fde0 TM |
599 | { |
600 | struct rpc_message msg = { | |
803a9067 | 601 | .rpc_proc = proc, |
5138fde0 | 602 | .rpc_argp = map, |
c0c077df | 603 | .rpc_resp = map, |
5138fde0 TM |
604 | }; |
605 | struct rpc_task_setup task_setup_data = { | |
606 | .rpc_client = rpcb_clnt, | |
607 | .rpc_message = &msg, | |
608 | .callback_ops = &rpcb_getport_ops, | |
609 | .callback_data = map, | |
012da158 | 610 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN, |
5138fde0 TM |
611 | }; |
612 | ||
613 | return rpc_run_task(&task_setup_data); | |
614 | } | |
615 | ||
9a4bd29f TM |
616 | /* |
617 | * In the case where rpc clients have been cloned, we want to make | |
618 | * sure that we use the program number/version etc of the actual | |
619 | * owner of the xprt. To do so, we walk back up the tree of parents | |
620 | * to find whoever created the transport and/or whoever has the | |
621 | * autobind flag set. | |
622 | */ | |
623 | static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt) | |
624 | { | |
625 | struct rpc_clnt *parent = clnt->cl_parent; | |
2446ab60 | 626 | struct rpc_xprt *xprt = rcu_dereference(clnt->cl_xprt); |
9a4bd29f TM |
627 | |
628 | while (parent != clnt) { | |
2446ab60 | 629 | if (rcu_dereference(parent->cl_xprt) != xprt) |
9a4bd29f TM |
630 | break; |
631 | if (clnt->cl_autobind) | |
632 | break; | |
633 | clnt = parent; | |
634 | parent = parent->cl_parent; | |
635 | } | |
636 | return clnt; | |
637 | } | |
638 | ||
a509050b | 639 | /** |
45160d62 | 640 | * rpcb_getport_async - obtain the port for a given RPC service on a given host |
a509050b CL |
641 | * @task: task that is waiting for portmapper request |
642 | * | |
643 | * This one can be called for an ongoing RPC request, and can be used in | |
644 | * an async (rpciod) context. | |
645 | */ | |
45160d62 | 646 | void rpcb_getport_async(struct rpc_task *task) |
a509050b | 647 | { |
9a4bd29f | 648 | struct rpc_clnt *clnt; |
803a9067 | 649 | struct rpc_procinfo *proc; |
0a48f5d7 | 650 | u32 bind_version; |
9a4bd29f | 651 | struct rpc_xprt *xprt; |
a509050b | 652 | struct rpc_clnt *rpcb_clnt; |
ec0dd267 | 653 | struct rpcbind_args *map; |
a509050b | 654 | struct rpc_task *child; |
9f6ad26d CL |
655 | struct sockaddr_storage addr; |
656 | struct sockaddr *sap = (struct sockaddr *)&addr; | |
657 | size_t salen; | |
a509050b CL |
658 | int status; |
659 | ||
2446ab60 TM |
660 | rcu_read_lock(); |
661 | do { | |
662 | clnt = rpcb_find_transport_owner(task->tk_client); | |
663 | xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); | |
664 | } while (xprt == NULL); | |
665 | rcu_read_unlock(); | |
9a4bd29f | 666 | |
45160d62 | 667 | dprintk("RPC: %5u %s(%s, %u, %u, %d)\n", |
0dc47877 | 668 | task->tk_pid, __func__, |
4e0038b6 | 669 | xprt->servername, clnt->cl_prog, clnt->cl_vers, xprt->prot); |
a509050b | 670 | |
381ba74a TM |
671 | /* Put self on the wait queue to ensure we get notified if |
672 | * some other task is already attempting to bind the port */ | |
673 | rpc_sleep_on(&xprt->binding, task, NULL); | |
674 | ||
a509050b | 675 | if (xprt_test_and_set_binding(xprt)) { |
45160d62 | 676 | dprintk("RPC: %5u %s: waiting for another binder\n", |
0dc47877 | 677 | task->tk_pid, __func__); |
2446ab60 | 678 | xprt_put(xprt); |
381ba74a | 679 | return; |
a509050b CL |
680 | } |
681 | ||
a509050b CL |
682 | /* Someone else may have bound if we slept */ |
683 | if (xprt_bound(xprt)) { | |
684 | status = 0; | |
45160d62 | 685 | dprintk("RPC: %5u %s: already bound\n", |
0dc47877 | 686 | task->tk_pid, __func__); |
a509050b CL |
687 | goto bailout_nofree; |
688 | } | |
689 | ||
ba809130 | 690 | /* Parent transport's destination address */ |
9f6ad26d | 691 | salen = rpc_peeraddr(clnt, sap, sizeof(addr)); |
d5b64430 CL |
692 | |
693 | /* Don't ever use rpcbind v2 for AF_INET6 requests */ | |
9f6ad26d | 694 | switch (sap->sa_family) { |
d5b64430 | 695 | case AF_INET: |
803a9067 TM |
696 | proc = rpcb_next_version[xprt->bind_index].rpc_proc; |
697 | bind_version = rpcb_next_version[xprt->bind_index].rpc_vers; | |
d5b64430 CL |
698 | break; |
699 | case AF_INET6: | |
803a9067 TM |
700 | proc = rpcb_next_version6[xprt->bind_index].rpc_proc; |
701 | bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers; | |
d5b64430 CL |
702 | break; |
703 | default: | |
704 | status = -EAFNOSUPPORT; | |
705 | dprintk("RPC: %5u %s: bad address family\n", | |
0dc47877 | 706 | task->tk_pid, __func__); |
d5b64430 CL |
707 | goto bailout_nofree; |
708 | } | |
803a9067 | 709 | if (proc == NULL) { |
a509050b | 710 | xprt->bind_index = 0; |
906462af | 711 | status = -EPFNOSUPPORT; |
45160d62 | 712 | dprintk("RPC: %5u %s: no more getport versions available\n", |
0dc47877 | 713 | task->tk_pid, __func__); |
a509050b CL |
714 | goto bailout_nofree; |
715 | } | |
a509050b | 716 | |
45160d62 | 717 | dprintk("RPC: %5u %s: trying rpcbind version %u\n", |
0dc47877 | 718 | task->tk_pid, __func__, bind_version); |
a509050b | 719 | |
4e0038b6 | 720 | rpcb_clnt = rpcb_create(xprt->xprt_net, xprt->servername, sap, salen, |
c2550e07 | 721 | xprt->prot, bind_version); |
143b6c40 CL |
722 | if (IS_ERR(rpcb_clnt)) { |
723 | status = PTR_ERR(rpcb_clnt); | |
724 | dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n", | |
0dc47877 | 725 | task->tk_pid, __func__, PTR_ERR(rpcb_clnt)); |
143b6c40 CL |
726 | goto bailout_nofree; |
727 | } | |
728 | ||
a509050b CL |
729 | map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC); |
730 | if (!map) { | |
731 | status = -ENOMEM; | |
45160d62 | 732 | dprintk("RPC: %5u %s: no memory available\n", |
0dc47877 | 733 | task->tk_pid, __func__); |
96165e2b | 734 | goto bailout_release_client; |
a509050b CL |
735 | } |
736 | map->r_prog = clnt->cl_prog; | |
737 | map->r_vers = clnt->cl_vers; | |
738 | map->r_prot = xprt->prot; | |
739 | map->r_port = 0; | |
864cf9bf | 740 | map->r_xprt = xprt; |
381ba74a | 741 | map->r_status = -EIO; |
a509050b | 742 | |
ba809130 CL |
743 | switch (bind_version) { |
744 | case RPCBVERS_4: | |
745 | case RPCBVERS_3: | |
2446ab60 | 746 | map->r_netid = xprt->address_strings[RPC_DISPLAY_NETID]; |
d77385f2 | 747 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_ATOMIC); |
ba809130 CL |
748 | map->r_owner = ""; |
749 | break; | |
750 | case RPCBVERS_2: | |
751 | map->r_addr = NULL; | |
752 | break; | |
753 | default: | |
754 | BUG(); | |
755 | } | |
756 | ||
803a9067 | 757 | child = rpcb_call_async(rpcb_clnt, map, proc); |
4c402b40 | 758 | rpc_release_client(rpcb_clnt); |
a509050b | 759 | if (IS_ERR(child)) { |
0d3a34b4 | 760 | /* rpcb_map_release() has freed the arguments */ |
45160d62 | 761 | dprintk("RPC: %5u %s: rpc_run_task failed\n", |
0dc47877 | 762 | task->tk_pid, __func__); |
381ba74a | 763 | return; |
a509050b | 764 | } |
a509050b | 765 | |
9a4bd29f TM |
766 | xprt->stat.bind_count++; |
767 | rpc_put_task(child); | |
a509050b CL |
768 | return; |
769 | ||
96165e2b TM |
770 | bailout_release_client: |
771 | rpc_release_client(rpcb_clnt); | |
a509050b CL |
772 | bailout_nofree: |
773 | rpcb_wake_rpcbind_waiters(xprt, status); | |
a509050b | 774 | task->tk_status = status; |
2446ab60 | 775 | xprt_put(xprt); |
a509050b | 776 | } |
12444809 | 777 | EXPORT_SYMBOL_GPL(rpcb_getport_async); |
a509050b CL |
778 | |
779 | /* | |
780 | * Rpcbind child task calls this callback via tk_exit. | |
781 | */ | |
782 | static void rpcb_getport_done(struct rpc_task *child, void *data) | |
783 | { | |
784 | struct rpcbind_args *map = data; | |
785 | struct rpc_xprt *xprt = map->r_xprt; | |
786 | int status = child->tk_status; | |
787 | ||
4784cb51 CL |
788 | /* Garbage reply: retry with a lesser rpcbind version */ |
789 | if (status == -EIO) | |
790 | status = -EPROTONOSUPPORT; | |
791 | ||
a509050b CL |
792 | /* rpcbind server doesn't support this rpcbind protocol version */ |
793 | if (status == -EPROTONOSUPPORT) | |
794 | xprt->bind_index++; | |
795 | ||
796 | if (status < 0) { | |
797 | /* rpcbind server not available on remote host? */ | |
798 | xprt->ops->set_port(xprt, 0); | |
799 | } else if (map->r_port == 0) { | |
800 | /* Requested RPC service wasn't registered on remote host */ | |
801 | xprt->ops->set_port(xprt, 0); | |
802 | status = -EACCES; | |
803 | } else { | |
804 | /* Succeeded */ | |
805 | xprt->ops->set_port(xprt, map->r_port); | |
806 | xprt_set_bound(xprt); | |
807 | status = 0; | |
808 | } | |
809 | ||
810 | dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n", | |
811 | child->tk_pid, status, map->r_port); | |
812 | ||
381ba74a | 813 | map->r_status = status; |
a509050b CL |
814 | } |
815 | ||
166b88d7 CL |
816 | /* |
817 | * XDR functions for rpcbind | |
818 | */ | |
819 | ||
9f06c719 CL |
820 | static void rpcb_enc_mapping(struct rpc_rqst *req, struct xdr_stream *xdr, |
821 | const struct rpcbind_args *rpcb) | |
6f2c2db7 | 822 | { |
9f06c719 | 823 | __be32 *p; |
6f2c2db7 CL |
824 | |
825 | dprintk("RPC: %5u encoding PMAP_%s call (%u, %u, %d, %u)\n", | |
ffa94db6 TM |
826 | req->rq_task->tk_pid, |
827 | req->rq_task->tk_msg.rpc_proc->p_name, | |
6f2c2db7 CL |
828 | rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port); |
829 | ||
9f06c719 | 830 | p = xdr_reserve_space(xdr, RPCB_mappingargs_sz << 2); |
4129ccf3 CL |
831 | *p++ = cpu_to_be32(rpcb->r_prog); |
832 | *p++ = cpu_to_be32(rpcb->r_vers); | |
833 | *p++ = cpu_to_be32(rpcb->r_prot); | |
834 | *p = cpu_to_be32(rpcb->r_port); | |
6f2c2db7 CL |
835 | } |
836 | ||
bf269551 | 837 | static int rpcb_dec_getport(struct rpc_rqst *req, struct xdr_stream *xdr, |
c0c077df CL |
838 | struct rpcbind_args *rpcb) |
839 | { | |
c0c077df | 840 | unsigned long port; |
bf269551 | 841 | __be32 *p; |
c0c077df CL |
842 | |
843 | rpcb->r_port = 0; | |
844 | ||
bf269551 | 845 | p = xdr_inline_decode(xdr, 4); |
c0c077df CL |
846 | if (unlikely(p == NULL)) |
847 | return -EIO; | |
848 | ||
4129ccf3 | 849 | port = be32_to_cpup(p); |
ffa94db6 TM |
850 | dprintk("RPC: %5u PMAP_%s result: %lu\n", req->rq_task->tk_pid, |
851 | req->rq_task->tk_msg.rpc_proc->p_name, port); | |
4be929be | 852 | if (unlikely(port > USHRT_MAX)) |
c0c077df CL |
853 | return -EIO; |
854 | ||
855 | rpcb->r_port = port; | |
856 | return 0; | |
857 | } | |
858 | ||
bf269551 | 859 | static int rpcb_dec_set(struct rpc_rqst *req, struct xdr_stream *xdr, |
7ed0ff98 CL |
860 | unsigned int *boolp) |
861 | { | |
bf269551 | 862 | __be32 *p; |
7ed0ff98 | 863 | |
bf269551 | 864 | p = xdr_inline_decode(xdr, 4); |
7ed0ff98 CL |
865 | if (unlikely(p == NULL)) |
866 | return -EIO; | |
867 | ||
868 | *boolp = 0; | |
bf269551 | 869 | if (*p != xdr_zero) |
7ed0ff98 CL |
870 | *boolp = 1; |
871 | ||
872 | dprintk("RPC: %5u RPCB_%s call %s\n", | |
ffa94db6 TM |
873 | req->rq_task->tk_pid, |
874 | req->rq_task->tk_msg.rpc_proc->p_name, | |
7ed0ff98 CL |
875 | (*boolp ? "succeeded" : "failed")); |
876 | return 0; | |
877 | } | |
878 | ||
4129ccf3 CL |
879 | static void encode_rpcb_string(struct xdr_stream *xdr, const char *string, |
880 | const u32 maxstrlen) | |
6f2c2db7 | 881 | { |
6f2c2db7 | 882 | __be32 *p; |
4129ccf3 | 883 | u32 len; |
6f2c2db7 | 884 | |
6f2c2db7 | 885 | len = strlen(string); |
332e008a WAA |
886 | WARN_ON_ONCE(len > maxstrlen); |
887 | if (len > maxstrlen) | |
888 | /* truncate and hope for the best */ | |
889 | len = maxstrlen; | |
4129ccf3 | 890 | p = xdr_reserve_space(xdr, 4 + len); |
6f2c2db7 | 891 | xdr_encode_opaque(p, string, len); |
6f2c2db7 CL |
892 | } |
893 | ||
9f06c719 CL |
894 | static void rpcb_enc_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr, |
895 | const struct rpcbind_args *rpcb) | |
6f2c2db7 | 896 | { |
9f06c719 | 897 | __be32 *p; |
6f2c2db7 CL |
898 | |
899 | dprintk("RPC: %5u encoding RPCB_%s call (%u, %u, '%s', '%s')\n", | |
ffa94db6 TM |
900 | req->rq_task->tk_pid, |
901 | req->rq_task->tk_msg.rpc_proc->p_name, | |
6f2c2db7 CL |
902 | rpcb->r_prog, rpcb->r_vers, |
903 | rpcb->r_netid, rpcb->r_addr); | |
904 | ||
9f06c719 | 905 | p = xdr_reserve_space(xdr, (RPCB_program_sz + RPCB_version_sz) << 2); |
4129ccf3 CL |
906 | *p++ = cpu_to_be32(rpcb->r_prog); |
907 | *p = cpu_to_be32(rpcb->r_vers); | |
6f2c2db7 | 908 | |
9f06c719 CL |
909 | encode_rpcb_string(xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN); |
910 | encode_rpcb_string(xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN); | |
911 | encode_rpcb_string(xdr, rpcb->r_owner, RPCB_MAXOWNERLEN); | |
6f2c2db7 CL |
912 | } |
913 | ||
bf269551 | 914 | static int rpcb_dec_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr, |
c0c077df CL |
915 | struct rpcbind_args *rpcb) |
916 | { | |
917 | struct sockaddr_storage address; | |
918 | struct sockaddr *sap = (struct sockaddr *)&address; | |
bf269551 | 919 | __be32 *p; |
c0c077df CL |
920 | u32 len; |
921 | ||
922 | rpcb->r_port = 0; | |
923 | ||
bf269551 | 924 | p = xdr_inline_decode(xdr, 4); |
c0c077df CL |
925 | if (unlikely(p == NULL)) |
926 | goto out_fail; | |
4129ccf3 | 927 | len = be32_to_cpup(p); |
c0c077df CL |
928 | |
929 | /* | |
930 | * If the returned universal address is a null string, | |
931 | * the requested RPC service was not registered. | |
932 | */ | |
933 | if (len == 0) { | |
934 | dprintk("RPC: %5u RPCB reply: program not registered\n", | |
ffa94db6 | 935 | req->rq_task->tk_pid); |
c0c077df CL |
936 | return 0; |
937 | } | |
938 | ||
939 | if (unlikely(len > RPCBIND_MAXUADDRLEN)) | |
940 | goto out_fail; | |
941 | ||
bf269551 | 942 | p = xdr_inline_decode(xdr, len); |
c0c077df CL |
943 | if (unlikely(p == NULL)) |
944 | goto out_fail; | |
ffa94db6 TM |
945 | dprintk("RPC: %5u RPCB_%s reply: %s\n", req->rq_task->tk_pid, |
946 | req->rq_task->tk_msg.rpc_proc->p_name, (char *)p); | |
c0c077df | 947 | |
b030fb0b SK |
948 | if (rpc_uaddr2sockaddr(req->rq_xprt->xprt_net, (char *)p, len, |
949 | sap, sizeof(address)) == 0) | |
c0c077df CL |
950 | goto out_fail; |
951 | rpcb->r_port = rpc_get_port(sap); | |
952 | ||
953 | return 0; | |
954 | ||
955 | out_fail: | |
956 | dprintk("RPC: %5u malformed RPCB_%s reply\n", | |
ffa94db6 TM |
957 | req->rq_task->tk_pid, |
958 | req->rq_task->tk_msg.rpc_proc->p_name); | |
c0c077df CL |
959 | return -EIO; |
960 | } | |
961 | ||
a509050b CL |
962 | /* |
963 | * Not all rpcbind procedures described in RFC 1833 are implemented | |
964 | * since the Linux kernel RPC code requires only these. | |
965 | */ | |
f8b761ef | 966 | |
a509050b | 967 | static struct rpc_procinfo rpcb_procedures2[] = { |
f8b761ef CL |
968 | [RPCBPROC_SET] = { |
969 | .p_proc = RPCBPROC_SET, | |
9f06c719 | 970 | .p_encode = (kxdreproc_t)rpcb_enc_mapping, |
bf269551 | 971 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
972 | .p_arglen = RPCB_mappingargs_sz, |
973 | .p_replen = RPCB_setres_sz, | |
974 | .p_statidx = RPCBPROC_SET, | |
975 | .p_timer = 0, | |
976 | .p_name = "SET", | |
977 | }, | |
978 | [RPCBPROC_UNSET] = { | |
979 | .p_proc = RPCBPROC_UNSET, | |
9f06c719 | 980 | .p_encode = (kxdreproc_t)rpcb_enc_mapping, |
bf269551 | 981 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
982 | .p_arglen = RPCB_mappingargs_sz, |
983 | .p_replen = RPCB_setres_sz, | |
984 | .p_statidx = RPCBPROC_UNSET, | |
985 | .p_timer = 0, | |
986 | .p_name = "UNSET", | |
987 | }, | |
988 | [RPCBPROC_GETPORT] = { | |
989 | .p_proc = RPCBPROC_GETPORT, | |
9f06c719 | 990 | .p_encode = (kxdreproc_t)rpcb_enc_mapping, |
bf269551 | 991 | .p_decode = (kxdrdproc_t)rpcb_dec_getport, |
f8b761ef CL |
992 | .p_arglen = RPCB_mappingargs_sz, |
993 | .p_replen = RPCB_getportres_sz, | |
994 | .p_statidx = RPCBPROC_GETPORT, | |
995 | .p_timer = 0, | |
996 | .p_name = "GETPORT", | |
997 | }, | |
a509050b CL |
998 | }; |
999 | ||
1000 | static struct rpc_procinfo rpcb_procedures3[] = { | |
f8b761ef CL |
1001 | [RPCBPROC_SET] = { |
1002 | .p_proc = RPCBPROC_SET, | |
9f06c719 | 1003 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1004 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
1005 | .p_arglen = RPCB_getaddrargs_sz, |
1006 | .p_replen = RPCB_setres_sz, | |
1007 | .p_statidx = RPCBPROC_SET, | |
1008 | .p_timer = 0, | |
1009 | .p_name = "SET", | |
1010 | }, | |
1011 | [RPCBPROC_UNSET] = { | |
1012 | .p_proc = RPCBPROC_UNSET, | |
9f06c719 | 1013 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1014 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
1015 | .p_arglen = RPCB_getaddrargs_sz, |
1016 | .p_replen = RPCB_setres_sz, | |
1017 | .p_statidx = RPCBPROC_UNSET, | |
1018 | .p_timer = 0, | |
1019 | .p_name = "UNSET", | |
1020 | }, | |
1021 | [RPCBPROC_GETADDR] = { | |
1022 | .p_proc = RPCBPROC_GETADDR, | |
9f06c719 | 1023 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1024 | .p_decode = (kxdrdproc_t)rpcb_dec_getaddr, |
f8b761ef CL |
1025 | .p_arglen = RPCB_getaddrargs_sz, |
1026 | .p_replen = RPCB_getaddrres_sz, | |
1027 | .p_statidx = RPCBPROC_GETADDR, | |
1028 | .p_timer = 0, | |
1029 | .p_name = "GETADDR", | |
1030 | }, | |
a509050b CL |
1031 | }; |
1032 | ||
1033 | static struct rpc_procinfo rpcb_procedures4[] = { | |
f8b761ef CL |
1034 | [RPCBPROC_SET] = { |
1035 | .p_proc = RPCBPROC_SET, | |
9f06c719 | 1036 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1037 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
1038 | .p_arglen = RPCB_getaddrargs_sz, |
1039 | .p_replen = RPCB_setres_sz, | |
1040 | .p_statidx = RPCBPROC_SET, | |
1041 | .p_timer = 0, | |
1042 | .p_name = "SET", | |
1043 | }, | |
1044 | [RPCBPROC_UNSET] = { | |
1045 | .p_proc = RPCBPROC_UNSET, | |
9f06c719 | 1046 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1047 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
1048 | .p_arglen = RPCB_getaddrargs_sz, |
1049 | .p_replen = RPCB_setres_sz, | |
1050 | .p_statidx = RPCBPROC_UNSET, | |
1051 | .p_timer = 0, | |
1052 | .p_name = "UNSET", | |
1053 | }, | |
1054 | [RPCBPROC_GETADDR] = { | |
1055 | .p_proc = RPCBPROC_GETADDR, | |
9f06c719 | 1056 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1057 | .p_decode = (kxdrdproc_t)rpcb_dec_getaddr, |
f8b761ef CL |
1058 | .p_arglen = RPCB_getaddrargs_sz, |
1059 | .p_replen = RPCB_getaddrres_sz, | |
1060 | .p_statidx = RPCBPROC_GETADDR, | |
1061 | .p_timer = 0, | |
1062 | .p_name = "GETADDR", | |
1063 | }, | |
a509050b CL |
1064 | }; |
1065 | ||
a613fa16 | 1066 | static const struct rpcb_info rpcb_next_version[] = { |
fc200e79 CL |
1067 | { |
1068 | .rpc_vers = RPCBVERS_2, | |
1069 | .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT], | |
1070 | }, | |
1071 | { | |
1072 | .rpc_proc = NULL, | |
1073 | }, | |
a509050b CL |
1074 | }; |
1075 | ||
a613fa16 | 1076 | static const struct rpcb_info rpcb_next_version6[] = { |
fc200e79 CL |
1077 | { |
1078 | .rpc_vers = RPCBVERS_4, | |
8842413a | 1079 | .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR], |
fc200e79 CL |
1080 | }, |
1081 | { | |
1082 | .rpc_vers = RPCBVERS_3, | |
1083 | .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR], | |
1084 | }, | |
fc200e79 CL |
1085 | { |
1086 | .rpc_proc = NULL, | |
1087 | }, | |
d5b64430 CL |
1088 | }; |
1089 | ||
a613fa16 | 1090 | static const struct rpc_version rpcb_version2 = { |
fc200e79 | 1091 | .number = RPCBVERS_2, |
1ac7c23e | 1092 | .nrprocs = ARRAY_SIZE(rpcb_procedures2), |
a509050b CL |
1093 | .procs = rpcb_procedures2 |
1094 | }; | |
1095 | ||
a613fa16 | 1096 | static const struct rpc_version rpcb_version3 = { |
fc200e79 | 1097 | .number = RPCBVERS_3, |
1ac7c23e | 1098 | .nrprocs = ARRAY_SIZE(rpcb_procedures3), |
a509050b CL |
1099 | .procs = rpcb_procedures3 |
1100 | }; | |
1101 | ||
a613fa16 | 1102 | static const struct rpc_version rpcb_version4 = { |
fc200e79 | 1103 | .number = RPCBVERS_4, |
1ac7c23e | 1104 | .nrprocs = ARRAY_SIZE(rpcb_procedures4), |
a509050b CL |
1105 | .procs = rpcb_procedures4 |
1106 | }; | |
1107 | ||
a613fa16 | 1108 | static const struct rpc_version *rpcb_version[] = { |
a509050b CL |
1109 | NULL, |
1110 | NULL, | |
1111 | &rpcb_version2, | |
1112 | &rpcb_version3, | |
1113 | &rpcb_version4 | |
1114 | }; | |
1115 | ||
1116 | static struct rpc_stat rpcb_stats; | |
1117 | ||
a613fa16 | 1118 | static const struct rpc_program rpcb_program = { |
a509050b CL |
1119 | .name = "rpcbind", |
1120 | .number = RPCBIND_PROGRAM, | |
1121 | .nrvers = ARRAY_SIZE(rpcb_version), | |
1122 | .version = rpcb_version, | |
1123 | .stats = &rpcb_stats, | |
1124 | }; |