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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 | ||
15 | #include <linux/types.h> | |
16 | #include <linux/socket.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/errno.h> | |
19 | ||
20 | #include <linux/sunrpc/clnt.h> | |
21 | #include <linux/sunrpc/sched.h> | |
22 | ||
23 | #ifdef RPC_DEBUG | |
24 | # define RPCDBG_FACILITY RPCDBG_BIND | |
25 | #endif | |
26 | ||
27 | #define RPCBIND_PROGRAM (100000u) | |
28 | #define RPCBIND_PORT (111u) | |
29 | ||
30 | enum { | |
31 | RPCBPROC_NULL, | |
32 | RPCBPROC_SET, | |
33 | RPCBPROC_UNSET, | |
34 | RPCBPROC_GETPORT, | |
35 | RPCBPROC_GETADDR = 3, /* alias for GETPORT */ | |
36 | RPCBPROC_DUMP, | |
37 | RPCBPROC_CALLIT, | |
38 | RPCBPROC_BCAST = 5, /* alias for CALLIT */ | |
39 | RPCBPROC_GETTIME, | |
40 | RPCBPROC_UADDR2TADDR, | |
41 | RPCBPROC_TADDR2UADDR, | |
42 | RPCBPROC_GETVERSADDR, | |
43 | RPCBPROC_INDIRECT, | |
44 | RPCBPROC_GETADDRLIST, | |
45 | RPCBPROC_GETSTAT, | |
46 | }; | |
47 | ||
48 | #define RPCB_HIGHPROC_2 RPCBPROC_CALLIT | |
49 | #define RPCB_HIGHPROC_3 RPCBPROC_TADDR2UADDR | |
50 | #define RPCB_HIGHPROC_4 RPCBPROC_GETSTAT | |
51 | ||
52 | /* | |
53 | * r_addr | |
54 | * | |
55 | * Quoting RFC 3530, section 2.2: | |
56 | * | |
57 | * For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the | |
58 | * US-ASCII string: | |
59 | * | |
60 | * h1.h2.h3.h4.p1.p2 | |
61 | * | |
62 | * The prefix, "h1.h2.h3.h4", is the standard textual form for | |
63 | * representing an IPv4 address, which is always four octets long. | |
64 | * Assuming big-endian ordering, h1, h2, h3, and h4, are respectively, | |
65 | * the first through fourth octets each converted to ASCII-decimal. | |
66 | * Assuming big-endian ordering, p1 and p2 are, respectively, the first | |
67 | * and second octets each converted to ASCII-decimal. For example, if a | |
68 | * host, in big-endian order, has an address of 0x0A010307 and there is | |
69 | * a service listening on, in big endian order, port 0x020F (decimal | |
70 | * 527), then the complete universal address is "10.1.3.7.2.15". | |
71 | * | |
72 | * ... | |
73 | * | |
74 | * For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the | |
75 | * US-ASCII string: | |
76 | * | |
77 | * x1:x2:x3:x4:x5:x6:x7:x8.p1.p2 | |
78 | * | |
79 | * The suffix "p1.p2" is the service port, and is computed the same way | |
80 | * as with universal addresses for TCP and UDP over IPv4. The prefix, | |
81 | * "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for | |
82 | * representing an IPv6 address as defined in Section 2.2 of [RFC2373]. | |
83 | * Additionally, the two alternative forms specified in Section 2.2 of | |
84 | * [RFC2373] are also acceptable. | |
85 | * | |
86 | * XXX: Currently this implementation does not explicitly convert the | |
87 | * stored address to US-ASCII on non-ASCII systems. | |
88 | */ | |
89 | #define RPCB_MAXADDRLEN (128u) | |
90 | ||
91 | /* | |
92 | * r_netid | |
93 | * | |
94 | * Quoting RFC 3530, section 2.2: | |
95 | * | |
96 | * For TCP over IPv4 the value of r_netid is the string "tcp". For UDP | |
97 | * over IPv4 the value of r_netid is the string "udp". | |
98 | * | |
99 | * ... | |
100 | * | |
101 | * For TCP over IPv6 the value of r_netid is the string "tcp6". For UDP | |
102 | * over IPv6 the value of r_netid is the string "udp6". | |
103 | */ | |
104 | #define RPCB_NETID_UDP "\165\144\160" /* "udp" */ | |
105 | #define RPCB_NETID_TCP "\164\143\160" /* "tcp" */ | |
106 | #define RPCB_NETID_UDP6 "\165\144\160\066" /* "udp6" */ | |
107 | #define RPCB_NETID_TCP6 "\164\143\160\066" /* "tcp6" */ | |
108 | ||
109 | #define RPCB_MAXNETIDLEN (4u) | |
110 | ||
111 | /* | |
112 | * r_owner | |
113 | * | |
114 | * The "owner" is allowed to unset a service in the rpcbind database. | |
115 | * We always use the following (arbitrary) fixed string. | |
116 | */ | |
117 | #define RPCB_OWNER_STRING "rpcb" | |
118 | #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING) | |
119 | ||
120 | static void rpcb_getport_done(struct rpc_task *, void *); | |
121 | extern struct rpc_program rpcb_program; | |
122 | ||
123 | struct rpcbind_args { | |
124 | struct rpc_xprt * r_xprt; | |
125 | ||
126 | u32 r_prog; | |
127 | u32 r_vers; | |
128 | u32 r_prot; | |
129 | unsigned short r_port; | |
130 | char * r_netid; | |
131 | char r_addr[RPCB_MAXADDRLEN]; | |
132 | char * r_owner; | |
133 | }; | |
134 | ||
135 | static struct rpc_procinfo rpcb_procedures2[]; | |
136 | static struct rpc_procinfo rpcb_procedures3[]; | |
137 | ||
138 | static struct rpcb_info { | |
139 | int rpc_vers; | |
140 | struct rpc_procinfo * rpc_proc; | |
141 | } rpcb_next_version[]; | |
142 | ||
143 | static void rpcb_getport_prepare(struct rpc_task *task, void *calldata) | |
144 | { | |
145 | struct rpcbind_args *map = calldata; | |
146 | struct rpc_xprt *xprt = map->r_xprt; | |
147 | struct rpc_message msg = { | |
148 | .rpc_proc = rpcb_next_version[xprt->bind_index].rpc_proc, | |
149 | .rpc_argp = map, | |
150 | .rpc_resp = &map->r_port, | |
151 | }; | |
152 | ||
153 | rpc_call_setup(task, &msg, 0); | |
154 | } | |
155 | ||
156 | static void rpcb_map_release(void *data) | |
157 | { | |
158 | struct rpcbind_args *map = data; | |
159 | ||
160 | xprt_put(map->r_xprt); | |
161 | kfree(map); | |
162 | } | |
163 | ||
164 | static const struct rpc_call_ops rpcb_getport_ops = { | |
165 | .rpc_call_prepare = rpcb_getport_prepare, | |
166 | .rpc_call_done = rpcb_getport_done, | |
167 | .rpc_release = rpcb_map_release, | |
168 | }; | |
169 | ||
170 | static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status) | |
171 | { | |
172 | xprt_clear_binding(xprt); | |
173 | rpc_wake_up_status(&xprt->binding, status); | |
174 | } | |
175 | ||
176 | static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr, | |
177 | int proto, int version, int privileged) | |
178 | { | |
179 | struct rpc_create_args args = { | |
180 | .protocol = proto, | |
181 | .address = srvaddr, | |
182 | .addrsize = sizeof(struct sockaddr_in), | |
183 | .servername = hostname, | |
184 | .program = &rpcb_program, | |
185 | .version = version, | |
186 | .authflavor = RPC_AUTH_UNIX, | |
187 | .flags = (RPC_CLNT_CREATE_ONESHOT | | |
188 | RPC_CLNT_CREATE_NOPING), | |
189 | }; | |
190 | ||
191 | ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT); | |
192 | if (!privileged) | |
193 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
194 | return rpc_create(&args); | |
195 | } | |
196 | ||
197 | /** | |
198 | * rpcb_register - set or unset a port registration with the local rpcbind svc | |
199 | * @prog: RPC program number to bind | |
200 | * @vers: RPC version number to bind | |
201 | * @prot: transport protocol to use to make this request | |
202 | * @port: port value to register | |
203 | * @okay: result code | |
204 | * | |
205 | * port == 0 means unregister, port != 0 means register. | |
206 | * | |
207 | * This routine supports only rpcbind version 2. | |
208 | */ | |
209 | int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay) | |
210 | { | |
211 | struct sockaddr_in sin = { | |
212 | .sin_family = AF_INET, | |
213 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
214 | }; | |
215 | struct rpcbind_args map = { | |
216 | .r_prog = prog, | |
217 | .r_vers = vers, | |
218 | .r_prot = prot, | |
219 | .r_port = port, | |
220 | }; | |
221 | struct rpc_message msg = { | |
222 | .rpc_proc = &rpcb_procedures2[port ? | |
223 | RPCBPROC_SET : RPCBPROC_UNSET], | |
224 | .rpc_argp = &map, | |
225 | .rpc_resp = okay, | |
226 | }; | |
227 | struct rpc_clnt *rpcb_clnt; | |
228 | int error = 0; | |
229 | ||
230 | dprintk("RPC: %sregistering (%u, %u, %d, %u) with local " | |
231 | "rpcbind\n", (port ? "" : "un"), | |
232 | prog, vers, prot, port); | |
233 | ||
234 | rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin, | |
235 | IPPROTO_UDP, 2, 1); | |
236 | if (IS_ERR(rpcb_clnt)) | |
237 | return PTR_ERR(rpcb_clnt); | |
238 | ||
239 | error = rpc_call_sync(rpcb_clnt, &msg, 0); | |
240 | ||
241 | if (error < 0) | |
242 | printk(KERN_WARNING "RPC: failed to contact local rpcbind " | |
243 | "server (errno %d).\n", -error); | |
244 | dprintk("RPC: registration status %d/%d\n", error, *okay); | |
245 | ||
246 | return error; | |
247 | } | |
248 | ||
249 | #ifdef CONFIG_ROOT_NFS | |
250 | /** | |
251 | * rpcb_getport_external - obtain the port for an RPC service on a given host | |
252 | * @sin: address of remote peer | |
253 | * @prog: RPC program number to bind | |
254 | * @vers: RPC version number to bind | |
255 | * @prot: transport protocol to use to make this request | |
256 | * | |
257 | * Called from outside the RPC client in a synchronous task context. | |
258 | * | |
259 | * For now, this supports only version 2 queries, but is used only by | |
260 | * mount_clnt for NFS_ROOT. | |
261 | */ | |
262 | int rpcb_getport_external(struct sockaddr_in *sin, __u32 prog, | |
263 | __u32 vers, int prot) | |
264 | { | |
265 | struct rpcbind_args map = { | |
266 | .r_prog = prog, | |
267 | .r_vers = vers, | |
268 | .r_prot = prot, | |
269 | .r_port = 0, | |
270 | }; | |
271 | struct rpc_message msg = { | |
272 | .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT], | |
273 | .rpc_argp = &map, | |
274 | .rpc_resp = &map.r_port, | |
275 | }; | |
276 | struct rpc_clnt *rpcb_clnt; | |
277 | char hostname[40]; | |
278 | int status; | |
279 | ||
280 | dprintk("RPC: rpcb_getport_external(%u.%u.%u.%u, %u, %u, %d)\n", | |
281 | NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot); | |
282 | ||
283 | sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr)); | |
284 | rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0); | |
285 | if (IS_ERR(rpcb_clnt)) | |
286 | return PTR_ERR(rpcb_clnt); | |
287 | ||
288 | status = rpc_call_sync(rpcb_clnt, &msg, 0); | |
289 | ||
290 | if (status >= 0) { | |
291 | if (map.r_port != 0) | |
292 | return map.r_port; | |
293 | status = -EACCES; | |
294 | } | |
295 | return status; | |
296 | } | |
297 | #endif | |
298 | ||
299 | /** | |
300 | * rpcb_getport - obtain the port for a given RPC service on a given host | |
301 | * @task: task that is waiting for portmapper request | |
302 | * | |
303 | * This one can be called for an ongoing RPC request, and can be used in | |
304 | * an async (rpciod) context. | |
305 | */ | |
306 | void rpcb_getport(struct rpc_task *task) | |
307 | { | |
308 | struct rpc_clnt *clnt = task->tk_client; | |
309 | int bind_version; | |
310 | struct rpc_xprt *xprt = task->tk_xprt; | |
311 | struct rpc_clnt *rpcb_clnt; | |
312 | static struct rpcbind_args *map; | |
313 | struct rpc_task *child; | |
314 | struct sockaddr addr; | |
315 | int status; | |
316 | ||
317 | dprintk("RPC: %5u rpcb_getport(%s, %u, %u, %d)\n", | |
318 | task->tk_pid, clnt->cl_server, | |
319 | clnt->cl_prog, clnt->cl_vers, xprt->prot); | |
320 | ||
321 | /* Autobind on cloned rpc clients is discouraged */ | |
322 | BUG_ON(clnt->cl_parent != clnt); | |
323 | ||
324 | if (xprt_test_and_set_binding(xprt)) { | |
325 | status = -EACCES; /* tell caller to check again */ | |
326 | dprintk("RPC: %5u rpcb_getport waiting for another binder\n", | |
327 | task->tk_pid); | |
328 | goto bailout_nowake; | |
329 | } | |
330 | ||
331 | /* Put self on queue before sending rpcbind request, in case | |
332 | * rpcb_getport_done completes before we return from rpc_run_task */ | |
333 | rpc_sleep_on(&xprt->binding, task, NULL, NULL); | |
334 | ||
335 | /* Someone else may have bound if we slept */ | |
336 | if (xprt_bound(xprt)) { | |
337 | status = 0; | |
338 | dprintk("RPC: %5u rpcb_getport already bound\n", task->tk_pid); | |
339 | goto bailout_nofree; | |
340 | } | |
341 | ||
342 | if (rpcb_next_version[xprt->bind_index].rpc_proc == NULL) { | |
343 | xprt->bind_index = 0; | |
344 | status = -EACCES; /* tell caller to try again later */ | |
345 | dprintk("RPC: %5u rpcb_getport no more getport versions " | |
346 | "available\n", task->tk_pid); | |
347 | goto bailout_nofree; | |
348 | } | |
349 | bind_version = rpcb_next_version[xprt->bind_index].rpc_vers; | |
350 | ||
351 | dprintk("RPC: %5u rpcb_getport trying rpcbind version %u\n", | |
352 | task->tk_pid, bind_version); | |
353 | ||
354 | map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC); | |
355 | if (!map) { | |
356 | status = -ENOMEM; | |
357 | dprintk("RPC: %5u rpcb_getport no memory available\n", | |
358 | task->tk_pid); | |
359 | goto bailout_nofree; | |
360 | } | |
361 | map->r_prog = clnt->cl_prog; | |
362 | map->r_vers = clnt->cl_vers; | |
363 | map->r_prot = xprt->prot; | |
364 | map->r_port = 0; | |
365 | map->r_xprt = xprt_get(xprt); | |
366 | map->r_netid = (xprt->prot == IPPROTO_TCP) ? RPCB_NETID_TCP : | |
367 | RPCB_NETID_UDP; | |
368 | memcpy(&map->r_addr, rpc_peeraddr2str(clnt, RPC_DISPLAY_ADDR), | |
369 | sizeof(map->r_addr)); | |
370 | map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */ | |
371 | ||
372 | rpc_peeraddr(clnt, (void *)&addr, sizeof(addr)); | |
373 | rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot, bind_version, 0); | |
374 | if (IS_ERR(rpcb_clnt)) { | |
375 | status = PTR_ERR(rpcb_clnt); | |
376 | dprintk("RPC: %5u rpcb_getport rpcb_create failed, error %ld\n", | |
377 | task->tk_pid, PTR_ERR(rpcb_clnt)); | |
378 | goto bailout; | |
379 | } | |
380 | ||
381 | child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map); | |
382 | if (IS_ERR(child)) { | |
383 | status = -EIO; | |
384 | dprintk("RPC: %5u rpcb_getport rpc_run_task failed\n", | |
385 | task->tk_pid); | |
386 | goto bailout_nofree; | |
387 | } | |
388 | rpc_put_task(child); | |
389 | ||
390 | task->tk_xprt->stat.bind_count++; | |
391 | return; | |
392 | ||
393 | bailout: | |
394 | kfree(map); | |
395 | xprt_put(xprt); | |
396 | bailout_nofree: | |
397 | rpcb_wake_rpcbind_waiters(xprt, status); | |
398 | bailout_nowake: | |
399 | task->tk_status = status; | |
400 | } | |
401 | ||
402 | /* | |
403 | * Rpcbind child task calls this callback via tk_exit. | |
404 | */ | |
405 | static void rpcb_getport_done(struct rpc_task *child, void *data) | |
406 | { | |
407 | struct rpcbind_args *map = data; | |
408 | struct rpc_xprt *xprt = map->r_xprt; | |
409 | int status = child->tk_status; | |
410 | ||
411 | /* rpcbind server doesn't support this rpcbind protocol version */ | |
412 | if (status == -EPROTONOSUPPORT) | |
413 | xprt->bind_index++; | |
414 | ||
415 | if (status < 0) { | |
416 | /* rpcbind server not available on remote host? */ | |
417 | xprt->ops->set_port(xprt, 0); | |
418 | } else if (map->r_port == 0) { | |
419 | /* Requested RPC service wasn't registered on remote host */ | |
420 | xprt->ops->set_port(xprt, 0); | |
421 | status = -EACCES; | |
422 | } else { | |
423 | /* Succeeded */ | |
424 | xprt->ops->set_port(xprt, map->r_port); | |
425 | xprt_set_bound(xprt); | |
426 | status = 0; | |
427 | } | |
428 | ||
429 | dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n", | |
430 | child->tk_pid, status, map->r_port); | |
431 | ||
432 | rpcb_wake_rpcbind_waiters(xprt, status); | |
433 | } | |
434 | ||
435 | static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p, | |
436 | struct rpcbind_args *rpcb) | |
437 | { | |
438 | dprintk("RPC: rpcb_encode_mapping(%u, %u, %d, %u)\n", | |
439 | rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port); | |
440 | *p++ = htonl(rpcb->r_prog); | |
441 | *p++ = htonl(rpcb->r_vers); | |
442 | *p++ = htonl(rpcb->r_prot); | |
443 | *p++ = htonl(rpcb->r_port); | |
444 | ||
445 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p, | |
450 | unsigned short *portp) | |
451 | { | |
452 | *portp = (unsigned short) ntohl(*p++); | |
453 | dprintk("RPC: rpcb_decode_getport result %u\n", | |
454 | *portp); | |
455 | return 0; | |
456 | } | |
457 | ||
458 | static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p, | |
459 | unsigned int *boolp) | |
460 | { | |
461 | *boolp = (unsigned int) ntohl(*p++); | |
462 | dprintk("RPC: rpcb_decode_set result %u\n", | |
463 | *boolp); | |
464 | return 0; | |
465 | } | |
466 | ||
467 | static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p, | |
468 | struct rpcbind_args *rpcb) | |
469 | { | |
470 | dprintk("RPC: rpcb_encode_getaddr(%u, %u, %s)\n", | |
471 | rpcb->r_prog, rpcb->r_vers, rpcb->r_addr); | |
472 | *p++ = htonl(rpcb->r_prog); | |
473 | *p++ = htonl(rpcb->r_vers); | |
474 | ||
475 | p = xdr_encode_string(p, rpcb->r_netid); | |
476 | p = xdr_encode_string(p, rpcb->r_addr); | |
477 | p = xdr_encode_string(p, rpcb->r_owner); | |
478 | ||
479 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
484 | static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p, | |
485 | unsigned short *portp) | |
486 | { | |
487 | char *addr; | |
488 | int addr_len, c, i, f, first, val; | |
489 | ||
490 | *portp = 0; | |
491 | addr_len = (unsigned int) ntohl(*p++); | |
492 | if (addr_len > RPCB_MAXADDRLEN) /* sanity */ | |
493 | return -EINVAL; | |
494 | ||
495 | dprintk("RPC: rpcb_decode_getaddr returned string: '%s'\n", | |
496 | (char *) p); | |
497 | ||
498 | addr = (char *)p; | |
499 | val = 0; | |
500 | first = 1; | |
501 | f = 1; | |
502 | for (i = addr_len - 1; i > 0; i--) { | |
503 | c = addr[i]; | |
504 | if (c >= '0' && c <= '9') { | |
505 | val += (c - '0') * f; | |
506 | f *= 10; | |
507 | } else if (c == '.') { | |
508 | if (first) { | |
509 | *portp = val; | |
510 | val = first = 0; | |
511 | f = 1; | |
512 | } else { | |
513 | *portp |= (val << 8); | |
514 | break; | |
515 | } | |
516 | } | |
517 | } | |
518 | ||
519 | dprintk("RPC: rpcb_decode_getaddr port=%u\n", *portp); | |
520 | return 0; | |
521 | } | |
522 | ||
523 | #define RPCB_program_sz (1u) | |
524 | #define RPCB_version_sz (1u) | |
525 | #define RPCB_protocol_sz (1u) | |
526 | #define RPCB_port_sz (1u) | |
527 | #define RPCB_boolean_sz (1u) | |
528 | ||
529 | #define RPCB_netid_sz (1+XDR_QUADLEN(RPCB_MAXNETIDLEN)) | |
530 | #define RPCB_addr_sz (1+XDR_QUADLEN(RPCB_MAXADDRLEN)) | |
531 | #define RPCB_ownerstring_sz (1+XDR_QUADLEN(RPCB_MAXOWNERLEN)) | |
532 | ||
533 | #define RPCB_mappingargs_sz RPCB_program_sz+RPCB_version_sz+ \ | |
534 | RPCB_protocol_sz+RPCB_port_sz | |
535 | #define RPCB_getaddrargs_sz RPCB_program_sz+RPCB_version_sz+ \ | |
536 | RPCB_netid_sz+RPCB_addr_sz+ \ | |
537 | RPCB_ownerstring_sz | |
538 | ||
539 | #define RPCB_setres_sz RPCB_boolean_sz | |
540 | #define RPCB_getportres_sz RPCB_port_sz | |
541 | ||
542 | /* | |
543 | * Note that RFC 1833 does not put any size restrictions on the | |
544 | * address string returned by the remote rpcbind database. | |
545 | */ | |
546 | #define RPCB_getaddrres_sz RPCB_addr_sz | |
547 | ||
548 | #define PROC(proc, argtype, restype) \ | |
549 | [RPCBPROC_##proc] = { \ | |
550 | .p_proc = RPCBPROC_##proc, \ | |
551 | .p_encode = (kxdrproc_t) rpcb_encode_##argtype, \ | |
552 | .p_decode = (kxdrproc_t) rpcb_decode_##restype, \ | |
553 | .p_arglen = RPCB_##argtype##args_sz, \ | |
554 | .p_replen = RPCB_##restype##res_sz, \ | |
555 | .p_statidx = RPCBPROC_##proc, \ | |
556 | .p_timer = 0, \ | |
557 | .p_name = #proc, \ | |
558 | } | |
559 | ||
560 | /* | |
561 | * Not all rpcbind procedures described in RFC 1833 are implemented | |
562 | * since the Linux kernel RPC code requires only these. | |
563 | */ | |
564 | static struct rpc_procinfo rpcb_procedures2[] = { | |
565 | PROC(SET, mapping, set), | |
566 | PROC(UNSET, mapping, set), | |
567 | PROC(GETADDR, mapping, getport), | |
568 | }; | |
569 | ||
570 | static struct rpc_procinfo rpcb_procedures3[] = { | |
571 | PROC(SET, mapping, set), | |
572 | PROC(UNSET, mapping, set), | |
573 | PROC(GETADDR, getaddr, getaddr), | |
574 | }; | |
575 | ||
576 | static struct rpc_procinfo rpcb_procedures4[] = { | |
577 | PROC(SET, mapping, set), | |
578 | PROC(UNSET, mapping, set), | |
579 | PROC(GETVERSADDR, getaddr, getaddr), | |
580 | }; | |
581 | ||
582 | static struct rpcb_info rpcb_next_version[] = { | |
583 | #ifdef CONFIG_SUNRPC_BIND34 | |
584 | { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] }, | |
585 | { 3, &rpcb_procedures3[RPCBPROC_GETADDR] }, | |
586 | #endif | |
587 | { 2, &rpcb_procedures2[RPCBPROC_GETPORT] }, | |
588 | { 0, NULL }, | |
589 | }; | |
590 | ||
591 | static struct rpc_version rpcb_version2 = { | |
592 | .number = 2, | |
593 | .nrprocs = RPCB_HIGHPROC_2, | |
594 | .procs = rpcb_procedures2 | |
595 | }; | |
596 | ||
597 | static struct rpc_version rpcb_version3 = { | |
598 | .number = 3, | |
599 | .nrprocs = RPCB_HIGHPROC_3, | |
600 | .procs = rpcb_procedures3 | |
601 | }; | |
602 | ||
603 | static struct rpc_version rpcb_version4 = { | |
604 | .number = 4, | |
605 | .nrprocs = RPCB_HIGHPROC_4, | |
606 | .procs = rpcb_procedures4 | |
607 | }; | |
608 | ||
609 | static struct rpc_version *rpcb_version[] = { | |
610 | NULL, | |
611 | NULL, | |
612 | &rpcb_version2, | |
613 | &rpcb_version3, | |
614 | &rpcb_version4 | |
615 | }; | |
616 | ||
617 | static struct rpc_stat rpcb_stats; | |
618 | ||
619 | struct rpc_program rpcb_program = { | |
620 | .name = "rpcbind", | |
621 | .number = RPCBIND_PROGRAM, | |
622 | .nrvers = ARRAY_SIZE(rpcb_version), | |
623 | .version = rpcb_version, | |
624 | .stats = &rpcb_stats, | |
625 | }; |