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> | |
5976687a | 29 | #include <linux/sunrpc/addr.h> |
a509050b | 30 | #include <linux/sunrpc/sched.h> |
0896a725 | 31 | #include <linux/sunrpc/xprtsock.h> |
a509050b | 32 | |
dff02d49 SK |
33 | #include "netns.h" |
34 | ||
a509050b CL |
35 | #ifdef RPC_DEBUG |
36 | # define RPCDBG_FACILITY RPCDBG_BIND | |
37 | #endif | |
38 | ||
7402ab19 CL |
39 | #define RPCBIND_SOCK_PATHNAME "/var/run/rpcbind.sock" |
40 | ||
a509050b CL |
41 | #define RPCBIND_PROGRAM (100000u) |
42 | #define RPCBIND_PORT (111u) | |
43 | ||
fc200e79 CL |
44 | #define RPCBVERS_2 (2u) |
45 | #define RPCBVERS_3 (3u) | |
46 | #define RPCBVERS_4 (4u) | |
47 | ||
a509050b CL |
48 | enum { |
49 | RPCBPROC_NULL, | |
50 | RPCBPROC_SET, | |
51 | RPCBPROC_UNSET, | |
52 | RPCBPROC_GETPORT, | |
53 | RPCBPROC_GETADDR = 3, /* alias for GETPORT */ | |
54 | RPCBPROC_DUMP, | |
55 | RPCBPROC_CALLIT, | |
56 | RPCBPROC_BCAST = 5, /* alias for CALLIT */ | |
57 | RPCBPROC_GETTIME, | |
58 | RPCBPROC_UADDR2TADDR, | |
59 | RPCBPROC_TADDR2UADDR, | |
60 | RPCBPROC_GETVERSADDR, | |
61 | RPCBPROC_INDIRECT, | |
62 | RPCBPROC_GETADDRLIST, | |
63 | RPCBPROC_GETSTAT, | |
64 | }; | |
65 | ||
a509050b CL |
66 | /* |
67 | * r_owner | |
68 | * | |
69 | * The "owner" is allowed to unset a service in the rpcbind database. | |
126e4bc3 CL |
70 | * |
71 | * For AF_LOCAL SET/UNSET requests, rpcbind treats this string as a | |
72 | * UID which it maps to a local user name via a password lookup. | |
73 | * In all other cases it is ignored. | |
74 | * | |
75 | * For SET/UNSET requests, user space provides a value, even for | |
76 | * network requests, and GETADDR uses an empty string. We follow | |
77 | * those precedents here. | |
a509050b | 78 | */ |
126e4bc3 | 79 | #define RPCB_OWNER_STRING "0" |
a509050b CL |
80 | #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING) |
81 | ||
0b10bf5e CL |
82 | /* |
83 | * XDR data type sizes | |
84 | */ | |
85 | #define RPCB_program_sz (1) | |
86 | #define RPCB_version_sz (1) | |
87 | #define RPCB_protocol_sz (1) | |
88 | #define RPCB_port_sz (1) | |
89 | #define RPCB_boolean_sz (1) | |
90 | ||
91 | #define RPCB_netid_sz (1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN)) | |
92 | #define RPCB_addr_sz (1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN)) | |
93 | #define RPCB_ownerstring_sz (1 + XDR_QUADLEN(RPCB_MAXOWNERLEN)) | |
94 | ||
95 | /* | |
96 | * XDR argument and result sizes | |
97 | */ | |
98 | #define RPCB_mappingargs_sz (RPCB_program_sz + RPCB_version_sz + \ | |
99 | RPCB_protocol_sz + RPCB_port_sz) | |
100 | #define RPCB_getaddrargs_sz (RPCB_program_sz + RPCB_version_sz + \ | |
101 | RPCB_netid_sz + RPCB_addr_sz + \ | |
102 | RPCB_ownerstring_sz) | |
103 | ||
104 | #define RPCB_getportres_sz RPCB_port_sz | |
105 | #define RPCB_setres_sz RPCB_boolean_sz | |
106 | ||
107 | /* | |
108 | * Note that RFC 1833 does not put any size restrictions on the | |
109 | * address string returned by the remote rpcbind database. | |
110 | */ | |
111 | #define RPCB_getaddrres_sz RPCB_addr_sz | |
112 | ||
a509050b | 113 | static void rpcb_getport_done(struct rpc_task *, void *); |
381ba74a | 114 | static void rpcb_map_release(void *data); |
a613fa16 | 115 | static const struct rpc_program rpcb_program; |
a509050b CL |
116 | |
117 | struct 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; | |
86d61d86 TM |
124 | const char * r_netid; |
125 | const char * r_addr; | |
126 | const char * r_owner; | |
381ba74a TM |
127 | |
128 | int r_status; | |
a509050b CL |
129 | }; |
130 | ||
131 | static struct rpc_procinfo rpcb_procedures2[]; | |
132 | static struct rpc_procinfo rpcb_procedures3[]; | |
c2e1b09f | 133 | static struct rpc_procinfo rpcb_procedures4[]; |
a509050b | 134 | |
d5b64430 | 135 | struct rpcb_info { |
fc200e79 | 136 | u32 rpc_vers; |
a509050b | 137 | struct rpc_procinfo * rpc_proc; |
d5b64430 CL |
138 | }; |
139 | ||
a613fa16 TM |
140 | static const struct rpcb_info rpcb_next_version[]; |
141 | static const struct rpcb_info rpcb_next_version6[]; | |
a509050b | 142 | |
a509050b | 143 | static const struct rpc_call_ops rpcb_getport_ops = { |
a509050b CL |
144 | .rpc_call_done = rpcb_getport_done, |
145 | .rpc_release = rpcb_map_release, | |
146 | }; | |
147 | ||
148 | static 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 | ||
381ba74a TM |
154 | static 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); | |
ba809130 | 160 | kfree(map->r_addr); |
381ba74a TM |
161 | kfree(map); |
162 | } | |
163 | ||
2ea75a10 | 164 | static int rpcb_get_local(struct net *net) |
914edb1b SK |
165 | { |
166 | int cnt; | |
2ea75a10 | 167 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
914edb1b | 168 | |
dff02d49 SK |
169 | spin_lock(&sn->rpcb_clnt_lock); |
170 | if (sn->rpcb_users) | |
171 | sn->rpcb_users++; | |
172 | cnt = sn->rpcb_users; | |
173 | spin_unlock(&sn->rpcb_clnt_lock); | |
914edb1b SK |
174 | |
175 | return cnt; | |
176 | } | |
177 | ||
f7a30c18 | 178 | void rpcb_put_local(struct net *net) |
914edb1b | 179 | { |
f7a30c18 | 180 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
dff02d49 SK |
181 | struct rpc_clnt *clnt = sn->rpcb_local_clnt; |
182 | struct rpc_clnt *clnt4 = sn->rpcb_local_clnt4; | |
9793f7c8 | 183 | int shutdown = 0; |
914edb1b | 184 | |
dff02d49 | 185 | spin_lock(&sn->rpcb_clnt_lock); |
9793f7c8 SK |
186 | if (sn->rpcb_users) { |
187 | if (--sn->rpcb_users == 0) { | |
188 | sn->rpcb_local_clnt = NULL; | |
189 | sn->rpcb_local_clnt4 = NULL; | |
190 | } | |
191 | shutdown = !sn->rpcb_users; | |
914edb1b | 192 | } |
dff02d49 | 193 | spin_unlock(&sn->rpcb_clnt_lock); |
914edb1b SK |
194 | |
195 | if (shutdown) { | |
196 | /* | |
197 | * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister | |
198 | */ | |
199 | if (clnt4) | |
200 | rpc_shutdown_client(clnt4); | |
201 | if (clnt) | |
202 | rpc_shutdown_client(clnt); | |
203 | } | |
204 | } | |
205 | ||
2ea75a10 | 206 | static void rpcb_set_local(struct net *net, struct rpc_clnt *clnt, |
786615bc TM |
207 | struct rpc_clnt *clnt4, |
208 | bool is_af_local) | |
914edb1b | 209 | { |
2ea75a10 | 210 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
dff02d49 | 211 | |
914edb1b | 212 | /* Protected by rpcb_create_local_mutex */ |
dff02d49 SK |
213 | sn->rpcb_local_clnt = clnt; |
214 | sn->rpcb_local_clnt4 = clnt4; | |
786615bc | 215 | sn->rpcb_is_af_local = is_af_local ? 1 : 0; |
914edb1b | 216 | smp_wmb(); |
dff02d49 | 217 | sn->rpcb_users = 1; |
914edb1b | 218 | dprintk("RPC: created new rpcb local clients (rpcb_local_clnt: " |
2ea75a10 SK |
219 | "%p, rpcb_local_clnt4: %p) for net %p%s\n", |
220 | sn->rpcb_local_clnt, sn->rpcb_local_clnt4, | |
221 | net, (net == &init_net) ? " (init_net)" : ""); | |
914edb1b SK |
222 | } |
223 | ||
7402ab19 CL |
224 | /* |
225 | * Returns zero on success, otherwise a negative errno value | |
226 | * is returned. | |
227 | */ | |
2ea75a10 | 228 | static int rpcb_create_local_unix(struct net *net) |
7402ab19 CL |
229 | { |
230 | static const struct sockaddr_un rpcb_localaddr_rpcbind = { | |
231 | .sun_family = AF_LOCAL, | |
232 | .sun_path = RPCBIND_SOCK_PATHNAME, | |
233 | }; | |
234 | struct rpc_create_args args = { | |
2ea75a10 | 235 | .net = net, |
7402ab19 CL |
236 | .protocol = XPRT_TRANSPORT_LOCAL, |
237 | .address = (struct sockaddr *)&rpcb_localaddr_rpcbind, | |
238 | .addrsize = sizeof(rpcb_localaddr_rpcbind), | |
239 | .servername = "localhost", | |
240 | .program = &rpcb_program, | |
241 | .version = RPCBVERS_2, | |
242 | .authflavor = RPC_AUTH_NULL, | |
00326ed6 TM |
243 | /* |
244 | * We turn off the idle timeout to prevent the kernel | |
245 | * from automatically disconnecting the socket. | |
246 | * Otherwise, we'd have to cache the mount namespace | |
247 | * of the caller and somehow pass that to the socket | |
248 | * reconnect code. | |
249 | */ | |
250 | .flags = RPC_CLNT_CREATE_NO_IDLE_TIMEOUT, | |
7402ab19 CL |
251 | }; |
252 | struct rpc_clnt *clnt, *clnt4; | |
253 | int result = 0; | |
254 | ||
255 | /* | |
256 | * Because we requested an RPC PING at transport creation time, | |
257 | * this works only if the user space portmapper is rpcbind, and | |
258 | * it's listening on AF_LOCAL on the named socket. | |
259 | */ | |
260 | clnt = rpc_create(&args); | |
261 | if (IS_ERR(clnt)) { | |
262 | dprintk("RPC: failed to create AF_LOCAL rpcbind " | |
263 | "client (errno %ld).\n", PTR_ERR(clnt)); | |
caea33da | 264 | result = PTR_ERR(clnt); |
7402ab19 CL |
265 | goto out; |
266 | } | |
267 | ||
268 | clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4); | |
269 | if (IS_ERR(clnt4)) { | |
270 | dprintk("RPC: failed to bind second program to " | |
271 | "rpcbind v4 client (errno %ld).\n", | |
272 | PTR_ERR(clnt4)); | |
273 | clnt4 = NULL; | |
274 | } | |
275 | ||
786615bc | 276 | rpcb_set_local(net, clnt, clnt4, true); |
cc5598b7 | 277 | |
7402ab19 CL |
278 | out: |
279 | return result; | |
280 | } | |
c526611d CL |
281 | |
282 | /* | |
283 | * Returns zero on success, otherwise a negative errno value | |
284 | * is returned. | |
285 | */ | |
2ea75a10 | 286 | static int rpcb_create_local_net(struct net *net) |
cc5598b7 | 287 | { |
7402ab19 CL |
288 | static const struct sockaddr_in rpcb_inaddr_loopback = { |
289 | .sin_family = AF_INET, | |
290 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
291 | .sin_port = htons(RPCBIND_PORT), | |
292 | }; | |
cc5598b7 | 293 | struct rpc_create_args args = { |
2ea75a10 | 294 | .net = net, |
2a76b3bf | 295 | .protocol = XPRT_TRANSPORT_TCP, |
5a462115 CL |
296 | .address = (struct sockaddr *)&rpcb_inaddr_loopback, |
297 | .addrsize = sizeof(rpcb_inaddr_loopback), | |
cc5598b7 CL |
298 | .servername = "localhost", |
299 | .program = &rpcb_program, | |
c526611d | 300 | .version = RPCBVERS_2, |
cc5598b7 CL |
301 | .authflavor = RPC_AUTH_UNIX, |
302 | .flags = RPC_CLNT_CREATE_NOPING, | |
303 | }; | |
c526611d CL |
304 | struct rpc_clnt *clnt, *clnt4; |
305 | int result = 0; | |
306 | ||
c526611d CL |
307 | clnt = rpc_create(&args); |
308 | if (IS_ERR(clnt)) { | |
309 | dprintk("RPC: failed to create local rpcbind " | |
310 | "client (errno %ld).\n", PTR_ERR(clnt)); | |
caea33da | 311 | result = PTR_ERR(clnt); |
c526611d CL |
312 | goto out; |
313 | } | |
cc5598b7 | 314 | |
c526611d CL |
315 | /* |
316 | * This results in an RPC ping. On systems running portmapper, | |
317 | * the v4 ping will fail. Proceed anyway, but disallow rpcb | |
318 | * v4 upcalls. | |
319 | */ | |
320 | clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4); | |
321 | if (IS_ERR(clnt4)) { | |
38359352 CL |
322 | dprintk("RPC: failed to bind second program to " |
323 | "rpcbind v4 client (errno %ld).\n", | |
324 | PTR_ERR(clnt4)); | |
c526611d CL |
325 | clnt4 = NULL; |
326 | } | |
327 | ||
786615bc | 328 | rpcb_set_local(net, clnt, clnt4, false); |
c526611d | 329 | |
7402ab19 CL |
330 | out: |
331 | return result; | |
332 | } | |
333 | ||
334 | /* | |
335 | * Returns zero on success, otherwise a negative errno value | |
336 | * is returned. | |
337 | */ | |
f7a30c18 | 338 | int rpcb_create_local(struct net *net) |
7402ab19 CL |
339 | { |
340 | static DEFINE_MUTEX(rpcb_create_local_mutex); | |
341 | int result = 0; | |
342 | ||
2ea75a10 | 343 | if (rpcb_get_local(net)) |
7402ab19 CL |
344 | return result; |
345 | ||
346 | mutex_lock(&rpcb_create_local_mutex); | |
2ea75a10 | 347 | if (rpcb_get_local(net)) |
7402ab19 CL |
348 | goto out; |
349 | ||
2ea75a10 SK |
350 | if (rpcb_create_local_unix(net) != 0) |
351 | result = rpcb_create_local_net(net); | |
7402ab19 | 352 | |
c526611d CL |
353 | out: |
354 | mutex_unlock(&rpcb_create_local_mutex); | |
355 | return result; | |
cc5598b7 CL |
356 | } |
357 | ||
6eac7d3f | 358 | static struct rpc_clnt *rpcb_create(struct net *net, const char *hostname, |
c2550e07 SK |
359 | struct sockaddr *srvaddr, size_t salen, |
360 | int proto, u32 version) | |
a509050b CL |
361 | { |
362 | struct rpc_create_args args = { | |
c2550e07 | 363 | .net = net, |
a509050b CL |
364 | .protocol = proto, |
365 | .address = srvaddr, | |
9f6ad26d | 366 | .addrsize = salen, |
a509050b CL |
367 | .servername = hostname, |
368 | .program = &rpcb_program, | |
369 | .version = version, | |
370 | .authflavor = RPC_AUTH_UNIX, | |
423d8b06 CL |
371 | .flags = (RPC_CLNT_CREATE_NOPING | |
372 | RPC_CLNT_CREATE_NONPRIVPORT), | |
a509050b CL |
373 | }; |
374 | ||
d5b64430 CL |
375 | switch (srvaddr->sa_family) { |
376 | case AF_INET: | |
377 | ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT); | |
378 | break; | |
379 | case AF_INET6: | |
380 | ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT); | |
381 | break; | |
382 | default: | |
c636b572 | 383 | return ERR_PTR(-EAFNOSUPPORT); |
d5b64430 CL |
384 | } |
385 | ||
a509050b CL |
386 | return rpc_create(&args); |
387 | } | |
388 | ||
786615bc | 389 | static int rpcb_register_call(struct sunrpc_net *sn, struct rpc_clnt *clnt, struct rpc_message *msg, bool is_set) |
babe80eb | 390 | { |
786615bc TM |
391 | int flags = RPC_TASK_NOCONNECT; |
392 | int error, result = 0; | |
babe80eb | 393 | |
786615bc TM |
394 | if (is_set || !sn->rpcb_is_af_local) |
395 | flags = RPC_TASK_SOFTCONN; | |
14aeb211 | 396 | msg->rpc_resp = &result; |
babe80eb | 397 | |
786615bc | 398 | error = rpc_call_sync(clnt, msg, flags); |
14aeb211 | 399 | if (error < 0) { |
363f724c | 400 | dprintk("RPC: failed to contact local rpcbind " |
babe80eb | 401 | "server (errno %d).\n", -error); |
14aeb211 CL |
402 | return error; |
403 | } | |
404 | ||
db820d63 | 405 | if (!result) |
14aeb211 | 406 | return -EACCES; |
14aeb211 | 407 | return 0; |
babe80eb CL |
408 | } |
409 | ||
a509050b CL |
410 | /** |
411 | * rpcb_register - set or unset a port registration with the local rpcbind svc | |
bda14606 | 412 | * @net: target network namespace |
a509050b CL |
413 | * @prog: RPC program number to bind |
414 | * @vers: RPC version number to bind | |
c2e1b09f | 415 | * @prot: transport protocol to register |
a509050b | 416 | * @port: port value to register |
14aeb211 CL |
417 | * |
418 | * Returns zero if the registration request was dispatched successfully | |
419 | * and the rpcbind daemon returned success. Otherwise, returns an errno | |
420 | * value that reflects the nature of the error (request could not be | |
421 | * dispatched, timed out, or rpcbind returned an error). | |
c2e1b09f CL |
422 | * |
423 | * RPC services invoke this function to advertise their contact | |
424 | * information via the system's rpcbind daemon. RPC services | |
425 | * invoke this function once for each [program, version, transport] | |
426 | * tuple they wish to advertise. | |
427 | * | |
428 | * Callers may also unregister RPC services that are no longer | |
429 | * available by setting the passed-in port to zero. This removes | |
430 | * all registered transports for [program, version] from the local | |
431 | * rpcbind database. | |
432 | * | |
c2e1b09f CL |
433 | * This function uses rpcbind protocol version 2 to contact the |
434 | * local rpcbind daemon. | |
435 | * | |
436 | * Registration works over both AF_INET and AF_INET6, and services | |
437 | * registered via this function are advertised as available for any | |
438 | * address. If the local rpcbind daemon is listening on AF_INET6, | |
439 | * services registered via this function will be advertised on | |
440 | * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6 | |
441 | * addresses). | |
a509050b | 442 | */ |
977ac315 | 443 | int rpcb_register(struct net *net, u32 prog, u32 vers, int prot, unsigned short port) |
a509050b | 444 | { |
a509050b CL |
445 | struct rpcbind_args map = { |
446 | .r_prog = prog, | |
447 | .r_vers = vers, | |
448 | .r_prot = prot, | |
449 | .r_port = port, | |
450 | }; | |
451 | struct rpc_message msg = { | |
a509050b | 452 | .rpc_argp = &map, |
a509050b | 453 | }; |
977ac315 | 454 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
786615bc | 455 | bool is_set = false; |
a509050b CL |
456 | |
457 | dprintk("RPC: %sregistering (%u, %u, %d, %u) with local " | |
458 | "rpcbind\n", (port ? "" : "un"), | |
459 | prog, vers, prot, port); | |
460 | ||
babe80eb | 461 | msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET]; |
786615bc | 462 | if (port != 0) { |
babe80eb | 463 | msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET]; |
786615bc TM |
464 | is_set = true; |
465 | } | |
a509050b | 466 | |
786615bc | 467 | return rpcb_register_call(sn, sn->rpcb_local_clnt, &msg, is_set); |
a509050b CL |
468 | } |
469 | ||
c2e1b09f CL |
470 | /* |
471 | * Fill in AF_INET family-specific arguments to register | |
472 | */ | |
1a114a66 SK |
473 | static int rpcb_register_inet4(struct sunrpc_net *sn, |
474 | const struct sockaddr *sap, | |
1673d0de | 475 | struct rpc_message *msg) |
c2e1b09f | 476 | { |
3aba4553 | 477 | const struct sockaddr_in *sin = (const struct sockaddr_in *)sap; |
c2e1b09f | 478 | struct rpcbind_args *map = msg->rpc_argp; |
3aba4553 | 479 | unsigned short port = ntohs(sin->sin_port); |
786615bc | 480 | bool is_set = false; |
ba809130 | 481 | int result; |
c2e1b09f | 482 | |
d77385f2 | 483 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL); |
c2e1b09f CL |
484 | |
485 | dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with " | |
486 | "local rpcbind\n", (port ? "" : "un"), | |
487 | map->r_prog, map->r_vers, | |
488 | map->r_addr, map->r_netid); | |
489 | ||
490 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; | |
786615bc | 491 | if (port != 0) { |
c2e1b09f | 492 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET]; |
786615bc TM |
493 | is_set = true; |
494 | } | |
c2e1b09f | 495 | |
786615bc | 496 | result = rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, is_set); |
ba809130 CL |
497 | kfree(map->r_addr); |
498 | return result; | |
c2e1b09f CL |
499 | } |
500 | ||
501 | /* | |
502 | * Fill in AF_INET6 family-specific arguments to register | |
503 | */ | |
1a114a66 SK |
504 | static int rpcb_register_inet6(struct sunrpc_net *sn, |
505 | const struct sockaddr *sap, | |
1673d0de | 506 | struct rpc_message *msg) |
c2e1b09f | 507 | { |
3aba4553 | 508 | const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap; |
c2e1b09f | 509 | struct rpcbind_args *map = msg->rpc_argp; |
3aba4553 | 510 | unsigned short port = ntohs(sin6->sin6_port); |
786615bc | 511 | bool is_set = false; |
ba809130 | 512 | int result; |
c2e1b09f | 513 | |
d77385f2 | 514 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL); |
c2e1b09f CL |
515 | |
516 | dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with " | |
517 | "local rpcbind\n", (port ? "" : "un"), | |
518 | map->r_prog, map->r_vers, | |
519 | map->r_addr, map->r_netid); | |
520 | ||
521 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; | |
786615bc | 522 | if (port != 0) { |
c2e1b09f | 523 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET]; |
786615bc TM |
524 | is_set = true; |
525 | } | |
c2e1b09f | 526 | |
786615bc | 527 | result = rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, is_set); |
ba809130 CL |
528 | kfree(map->r_addr); |
529 | return result; | |
c2e1b09f CL |
530 | } |
531 | ||
1a114a66 SK |
532 | static int rpcb_unregister_all_protofamilies(struct sunrpc_net *sn, |
533 | struct rpc_message *msg) | |
1673d0de CL |
534 | { |
535 | struct rpcbind_args *map = msg->rpc_argp; | |
536 | ||
537 | dprintk("RPC: unregistering [%u, %u, '%s'] with " | |
538 | "local rpcbind\n", | |
539 | map->r_prog, map->r_vers, map->r_netid); | |
540 | ||
541 | map->r_addr = ""; | |
542 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; | |
543 | ||
786615bc | 544 | return rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, false); |
1673d0de CL |
545 | } |
546 | ||
c2e1b09f CL |
547 | /** |
548 | * rpcb_v4_register - set or unset a port registration with the local rpcbind | |
bda14606 | 549 | * @net: target network namespace |
c2e1b09f CL |
550 | * @program: RPC program number of service to (un)register |
551 | * @version: RPC version number of service to (un)register | |
552 | * @address: address family, IP address, and port to (un)register | |
553 | * @netid: netid of transport protocol to (un)register | |
14aeb211 CL |
554 | * |
555 | * Returns zero if the registration request was dispatched successfully | |
556 | * and the rpcbind daemon returned success. Otherwise, returns an errno | |
557 | * value that reflects the nature of the error (request could not be | |
558 | * dispatched, timed out, or rpcbind returned an error). | |
c2e1b09f CL |
559 | * |
560 | * RPC services invoke this function to advertise their contact | |
561 | * information via the system's rpcbind daemon. RPC services | |
562 | * invoke this function once for each [program, version, address, | |
563 | * netid] tuple they wish to advertise. | |
564 | * | |
1673d0de CL |
565 | * Callers may also unregister RPC services that are registered at a |
566 | * specific address by setting the port number in @address to zero. | |
567 | * They may unregister all registered protocol families at once for | |
568 | * a service by passing a NULL @address argument. If @netid is "" | |
569 | * then all netids for [program, version, address] are unregistered. | |
c2e1b09f | 570 | * |
c2e1b09f CL |
571 | * This function uses rpcbind protocol version 4 to contact the |
572 | * local rpcbind daemon. The local rpcbind daemon must support | |
573 | * version 4 of the rpcbind protocol in order for these functions | |
574 | * to register a service successfully. | |
575 | * | |
576 | * Supported netids include "udp" and "tcp" for UDP and TCP over | |
577 | * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6, | |
578 | * respectively. | |
579 | * | |
580 | * The contents of @address determine the address family and the | |
581 | * port to be registered. The usual practice is to pass INADDR_ANY | |
582 | * as the raw address, but specifying a non-zero address is also | |
583 | * supported by this API if the caller wishes to advertise an RPC | |
584 | * service on a specific network interface. | |
585 | * | |
586 | * Note that passing in INADDR_ANY does not create the same service | |
587 | * registration as IN6ADDR_ANY. The former advertises an RPC | |
588 | * service on any IPv4 address, but not on IPv6. The latter | |
589 | * advertises the service on all IPv4 and IPv6 addresses. | |
590 | */ | |
977ac315 | 591 | int rpcb_v4_register(struct net *net, const u32 program, const u32 version, |
14aeb211 | 592 | const struct sockaddr *address, const char *netid) |
c2e1b09f CL |
593 | { |
594 | struct rpcbind_args map = { | |
595 | .r_prog = program, | |
596 | .r_vers = version, | |
597 | .r_netid = netid, | |
598 | .r_owner = RPCB_OWNER_STRING, | |
599 | }; | |
600 | struct rpc_message msg = { | |
601 | .rpc_argp = &map, | |
c2e1b09f | 602 | }; |
977ac315 | 603 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
c526611d | 604 | |
dff02d49 | 605 | if (sn->rpcb_local_clnt4 == NULL) |
c526611d | 606 | return -EPROTONOSUPPORT; |
c2e1b09f | 607 | |
1673d0de | 608 | if (address == NULL) |
1a114a66 | 609 | return rpcb_unregister_all_protofamilies(sn, &msg); |
1673d0de | 610 | |
c2e1b09f CL |
611 | switch (address->sa_family) { |
612 | case AF_INET: | |
1a114a66 | 613 | return rpcb_register_inet4(sn, address, &msg); |
c2e1b09f | 614 | case AF_INET6: |
1a114a66 | 615 | return rpcb_register_inet6(sn, address, &msg); |
c2e1b09f CL |
616 | } |
617 | ||
618 | return -EAFNOSUPPORT; | |
619 | } | |
620 | ||
803a9067 | 621 | static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc) |
5138fde0 TM |
622 | { |
623 | struct rpc_message msg = { | |
803a9067 | 624 | .rpc_proc = proc, |
5138fde0 | 625 | .rpc_argp = map, |
c0c077df | 626 | .rpc_resp = map, |
5138fde0 TM |
627 | }; |
628 | struct rpc_task_setup task_setup_data = { | |
629 | .rpc_client = rpcb_clnt, | |
630 | .rpc_message = &msg, | |
631 | .callback_ops = &rpcb_getport_ops, | |
632 | .callback_data = map, | |
012da158 | 633 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN, |
5138fde0 TM |
634 | }; |
635 | ||
636 | return rpc_run_task(&task_setup_data); | |
637 | } | |
638 | ||
9a4bd29f TM |
639 | /* |
640 | * In the case where rpc clients have been cloned, we want to make | |
641 | * sure that we use the program number/version etc of the actual | |
642 | * owner of the xprt. To do so, we walk back up the tree of parents | |
643 | * to find whoever created the transport and/or whoever has the | |
644 | * autobind flag set. | |
645 | */ | |
646 | static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt) | |
647 | { | |
648 | struct rpc_clnt *parent = clnt->cl_parent; | |
2446ab60 | 649 | struct rpc_xprt *xprt = rcu_dereference(clnt->cl_xprt); |
9a4bd29f TM |
650 | |
651 | while (parent != clnt) { | |
2446ab60 | 652 | if (rcu_dereference(parent->cl_xprt) != xprt) |
9a4bd29f TM |
653 | break; |
654 | if (clnt->cl_autobind) | |
655 | break; | |
656 | clnt = parent; | |
657 | parent = parent->cl_parent; | |
658 | } | |
659 | return clnt; | |
660 | } | |
661 | ||
a509050b | 662 | /** |
45160d62 | 663 | * rpcb_getport_async - obtain the port for a given RPC service on a given host |
a509050b CL |
664 | * @task: task that is waiting for portmapper request |
665 | * | |
666 | * This one can be called for an ongoing RPC request, and can be used in | |
667 | * an async (rpciod) context. | |
668 | */ | |
45160d62 | 669 | void rpcb_getport_async(struct rpc_task *task) |
a509050b | 670 | { |
9a4bd29f | 671 | struct rpc_clnt *clnt; |
803a9067 | 672 | struct rpc_procinfo *proc; |
0a48f5d7 | 673 | u32 bind_version; |
9a4bd29f | 674 | struct rpc_xprt *xprt; |
a509050b | 675 | struct rpc_clnt *rpcb_clnt; |
ec0dd267 | 676 | struct rpcbind_args *map; |
a509050b | 677 | struct rpc_task *child; |
9f6ad26d CL |
678 | struct sockaddr_storage addr; |
679 | struct sockaddr *sap = (struct sockaddr *)&addr; | |
680 | size_t salen; | |
a509050b CL |
681 | int status; |
682 | ||
2446ab60 TM |
683 | rcu_read_lock(); |
684 | do { | |
685 | clnt = rpcb_find_transport_owner(task->tk_client); | |
686 | xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); | |
687 | } while (xprt == NULL); | |
688 | rcu_read_unlock(); | |
9a4bd29f | 689 | |
45160d62 | 690 | dprintk("RPC: %5u %s(%s, %u, %u, %d)\n", |
0dc47877 | 691 | task->tk_pid, __func__, |
4e0038b6 | 692 | xprt->servername, clnt->cl_prog, clnt->cl_vers, xprt->prot); |
a509050b | 693 | |
381ba74a TM |
694 | /* Put self on the wait queue to ensure we get notified if |
695 | * some other task is already attempting to bind the port */ | |
696 | rpc_sleep_on(&xprt->binding, task, NULL); | |
697 | ||
a509050b | 698 | if (xprt_test_and_set_binding(xprt)) { |
45160d62 | 699 | dprintk("RPC: %5u %s: waiting for another binder\n", |
0dc47877 | 700 | task->tk_pid, __func__); |
2446ab60 | 701 | xprt_put(xprt); |
381ba74a | 702 | return; |
a509050b CL |
703 | } |
704 | ||
a509050b CL |
705 | /* Someone else may have bound if we slept */ |
706 | if (xprt_bound(xprt)) { | |
707 | status = 0; | |
45160d62 | 708 | dprintk("RPC: %5u %s: already bound\n", |
0dc47877 | 709 | task->tk_pid, __func__); |
a509050b CL |
710 | goto bailout_nofree; |
711 | } | |
712 | ||
ba809130 | 713 | /* Parent transport's destination address */ |
9f6ad26d | 714 | salen = rpc_peeraddr(clnt, sap, sizeof(addr)); |
d5b64430 CL |
715 | |
716 | /* Don't ever use rpcbind v2 for AF_INET6 requests */ | |
9f6ad26d | 717 | switch (sap->sa_family) { |
d5b64430 | 718 | case AF_INET: |
803a9067 TM |
719 | proc = rpcb_next_version[xprt->bind_index].rpc_proc; |
720 | bind_version = rpcb_next_version[xprt->bind_index].rpc_vers; | |
d5b64430 CL |
721 | break; |
722 | case AF_INET6: | |
803a9067 TM |
723 | proc = rpcb_next_version6[xprt->bind_index].rpc_proc; |
724 | bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers; | |
d5b64430 CL |
725 | break; |
726 | default: | |
727 | status = -EAFNOSUPPORT; | |
728 | dprintk("RPC: %5u %s: bad address family\n", | |
0dc47877 | 729 | task->tk_pid, __func__); |
d5b64430 CL |
730 | goto bailout_nofree; |
731 | } | |
803a9067 | 732 | if (proc == NULL) { |
a509050b | 733 | xprt->bind_index = 0; |
906462af | 734 | status = -EPFNOSUPPORT; |
45160d62 | 735 | dprintk("RPC: %5u %s: no more getport versions available\n", |
0dc47877 | 736 | task->tk_pid, __func__); |
a509050b CL |
737 | goto bailout_nofree; |
738 | } | |
a509050b | 739 | |
45160d62 | 740 | dprintk("RPC: %5u %s: trying rpcbind version %u\n", |
0dc47877 | 741 | task->tk_pid, __func__, bind_version); |
a509050b | 742 | |
4e0038b6 | 743 | rpcb_clnt = rpcb_create(xprt->xprt_net, xprt->servername, sap, salen, |
c2550e07 | 744 | xprt->prot, bind_version); |
143b6c40 CL |
745 | if (IS_ERR(rpcb_clnt)) { |
746 | status = PTR_ERR(rpcb_clnt); | |
747 | dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n", | |
0dc47877 | 748 | task->tk_pid, __func__, PTR_ERR(rpcb_clnt)); |
143b6c40 CL |
749 | goto bailout_nofree; |
750 | } | |
751 | ||
a509050b CL |
752 | map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC); |
753 | if (!map) { | |
754 | status = -ENOMEM; | |
45160d62 | 755 | dprintk("RPC: %5u %s: no memory available\n", |
0dc47877 | 756 | task->tk_pid, __func__); |
96165e2b | 757 | goto bailout_release_client; |
a509050b CL |
758 | } |
759 | map->r_prog = clnt->cl_prog; | |
760 | map->r_vers = clnt->cl_vers; | |
761 | map->r_prot = xprt->prot; | |
762 | map->r_port = 0; | |
864cf9bf | 763 | map->r_xprt = xprt; |
381ba74a | 764 | map->r_status = -EIO; |
a509050b | 765 | |
ba809130 CL |
766 | switch (bind_version) { |
767 | case RPCBVERS_4: | |
768 | case RPCBVERS_3: | |
2446ab60 | 769 | map->r_netid = xprt->address_strings[RPC_DISPLAY_NETID]; |
d77385f2 | 770 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_ATOMIC); |
ba809130 CL |
771 | map->r_owner = ""; |
772 | break; | |
773 | case RPCBVERS_2: | |
774 | map->r_addr = NULL; | |
775 | break; | |
776 | default: | |
777 | BUG(); | |
778 | } | |
779 | ||
803a9067 | 780 | child = rpcb_call_async(rpcb_clnt, map, proc); |
4c402b40 | 781 | rpc_release_client(rpcb_clnt); |
a509050b | 782 | if (IS_ERR(child)) { |
0d3a34b4 | 783 | /* rpcb_map_release() has freed the arguments */ |
45160d62 | 784 | dprintk("RPC: %5u %s: rpc_run_task failed\n", |
0dc47877 | 785 | task->tk_pid, __func__); |
381ba74a | 786 | return; |
a509050b | 787 | } |
a509050b | 788 | |
9a4bd29f TM |
789 | xprt->stat.bind_count++; |
790 | rpc_put_task(child); | |
a509050b CL |
791 | return; |
792 | ||
96165e2b TM |
793 | bailout_release_client: |
794 | rpc_release_client(rpcb_clnt); | |
a509050b CL |
795 | bailout_nofree: |
796 | rpcb_wake_rpcbind_waiters(xprt, status); | |
a509050b | 797 | task->tk_status = status; |
2446ab60 | 798 | xprt_put(xprt); |
a509050b | 799 | } |
12444809 | 800 | EXPORT_SYMBOL_GPL(rpcb_getport_async); |
a509050b CL |
801 | |
802 | /* | |
803 | * Rpcbind child task calls this callback via tk_exit. | |
804 | */ | |
805 | static void rpcb_getport_done(struct rpc_task *child, void *data) | |
806 | { | |
807 | struct rpcbind_args *map = data; | |
808 | struct rpc_xprt *xprt = map->r_xprt; | |
809 | int status = child->tk_status; | |
810 | ||
4784cb51 CL |
811 | /* Garbage reply: retry with a lesser rpcbind version */ |
812 | if (status == -EIO) | |
813 | status = -EPROTONOSUPPORT; | |
814 | ||
a509050b CL |
815 | /* rpcbind server doesn't support this rpcbind protocol version */ |
816 | if (status == -EPROTONOSUPPORT) | |
817 | xprt->bind_index++; | |
818 | ||
819 | if (status < 0) { | |
820 | /* rpcbind server not available on remote host? */ | |
821 | xprt->ops->set_port(xprt, 0); | |
822 | } else if (map->r_port == 0) { | |
823 | /* Requested RPC service wasn't registered on remote host */ | |
824 | xprt->ops->set_port(xprt, 0); | |
825 | status = -EACCES; | |
826 | } else { | |
827 | /* Succeeded */ | |
828 | xprt->ops->set_port(xprt, map->r_port); | |
829 | xprt_set_bound(xprt); | |
830 | status = 0; | |
831 | } | |
832 | ||
833 | dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n", | |
834 | child->tk_pid, status, map->r_port); | |
835 | ||
381ba74a | 836 | map->r_status = status; |
a509050b CL |
837 | } |
838 | ||
166b88d7 CL |
839 | /* |
840 | * XDR functions for rpcbind | |
841 | */ | |
842 | ||
9f06c719 CL |
843 | static void rpcb_enc_mapping(struct rpc_rqst *req, struct xdr_stream *xdr, |
844 | const struct rpcbind_args *rpcb) | |
6f2c2db7 | 845 | { |
9f06c719 | 846 | __be32 *p; |
6f2c2db7 CL |
847 | |
848 | dprintk("RPC: %5u encoding PMAP_%s call (%u, %u, %d, %u)\n", | |
ffa94db6 TM |
849 | req->rq_task->tk_pid, |
850 | req->rq_task->tk_msg.rpc_proc->p_name, | |
6f2c2db7 CL |
851 | rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port); |
852 | ||
9f06c719 | 853 | p = xdr_reserve_space(xdr, RPCB_mappingargs_sz << 2); |
4129ccf3 CL |
854 | *p++ = cpu_to_be32(rpcb->r_prog); |
855 | *p++ = cpu_to_be32(rpcb->r_vers); | |
856 | *p++ = cpu_to_be32(rpcb->r_prot); | |
857 | *p = cpu_to_be32(rpcb->r_port); | |
6f2c2db7 CL |
858 | } |
859 | ||
bf269551 | 860 | static int rpcb_dec_getport(struct rpc_rqst *req, struct xdr_stream *xdr, |
c0c077df CL |
861 | struct rpcbind_args *rpcb) |
862 | { | |
c0c077df | 863 | unsigned long port; |
bf269551 | 864 | __be32 *p; |
c0c077df CL |
865 | |
866 | rpcb->r_port = 0; | |
867 | ||
bf269551 | 868 | p = xdr_inline_decode(xdr, 4); |
c0c077df CL |
869 | if (unlikely(p == NULL)) |
870 | return -EIO; | |
871 | ||
4129ccf3 | 872 | port = be32_to_cpup(p); |
ffa94db6 TM |
873 | dprintk("RPC: %5u PMAP_%s result: %lu\n", req->rq_task->tk_pid, |
874 | req->rq_task->tk_msg.rpc_proc->p_name, port); | |
4be929be | 875 | if (unlikely(port > USHRT_MAX)) |
c0c077df CL |
876 | return -EIO; |
877 | ||
878 | rpcb->r_port = port; | |
879 | return 0; | |
880 | } | |
881 | ||
bf269551 | 882 | static int rpcb_dec_set(struct rpc_rqst *req, struct xdr_stream *xdr, |
7ed0ff98 CL |
883 | unsigned int *boolp) |
884 | { | |
bf269551 | 885 | __be32 *p; |
7ed0ff98 | 886 | |
bf269551 | 887 | p = xdr_inline_decode(xdr, 4); |
7ed0ff98 CL |
888 | if (unlikely(p == NULL)) |
889 | return -EIO; | |
890 | ||
891 | *boolp = 0; | |
bf269551 | 892 | if (*p != xdr_zero) |
7ed0ff98 CL |
893 | *boolp = 1; |
894 | ||
895 | dprintk("RPC: %5u RPCB_%s call %s\n", | |
ffa94db6 TM |
896 | req->rq_task->tk_pid, |
897 | req->rq_task->tk_msg.rpc_proc->p_name, | |
7ed0ff98 CL |
898 | (*boolp ? "succeeded" : "failed")); |
899 | return 0; | |
900 | } | |
901 | ||
4129ccf3 CL |
902 | static void encode_rpcb_string(struct xdr_stream *xdr, const char *string, |
903 | const u32 maxstrlen) | |
6f2c2db7 | 904 | { |
6f2c2db7 | 905 | __be32 *p; |
4129ccf3 | 906 | u32 len; |
6f2c2db7 | 907 | |
6f2c2db7 | 908 | len = strlen(string); |
332e008a WAA |
909 | WARN_ON_ONCE(len > maxstrlen); |
910 | if (len > maxstrlen) | |
911 | /* truncate and hope for the best */ | |
912 | len = maxstrlen; | |
4129ccf3 | 913 | p = xdr_reserve_space(xdr, 4 + len); |
6f2c2db7 | 914 | xdr_encode_opaque(p, string, len); |
6f2c2db7 CL |
915 | } |
916 | ||
9f06c719 CL |
917 | static void rpcb_enc_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr, |
918 | const struct rpcbind_args *rpcb) | |
6f2c2db7 | 919 | { |
9f06c719 | 920 | __be32 *p; |
6f2c2db7 CL |
921 | |
922 | dprintk("RPC: %5u encoding RPCB_%s call (%u, %u, '%s', '%s')\n", | |
ffa94db6 TM |
923 | req->rq_task->tk_pid, |
924 | req->rq_task->tk_msg.rpc_proc->p_name, | |
6f2c2db7 CL |
925 | rpcb->r_prog, rpcb->r_vers, |
926 | rpcb->r_netid, rpcb->r_addr); | |
927 | ||
9f06c719 | 928 | p = xdr_reserve_space(xdr, (RPCB_program_sz + RPCB_version_sz) << 2); |
4129ccf3 CL |
929 | *p++ = cpu_to_be32(rpcb->r_prog); |
930 | *p = cpu_to_be32(rpcb->r_vers); | |
6f2c2db7 | 931 | |
9f06c719 CL |
932 | encode_rpcb_string(xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN); |
933 | encode_rpcb_string(xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN); | |
934 | encode_rpcb_string(xdr, rpcb->r_owner, RPCB_MAXOWNERLEN); | |
6f2c2db7 CL |
935 | } |
936 | ||
bf269551 | 937 | static int rpcb_dec_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr, |
c0c077df CL |
938 | struct rpcbind_args *rpcb) |
939 | { | |
940 | struct sockaddr_storage address; | |
941 | struct sockaddr *sap = (struct sockaddr *)&address; | |
bf269551 | 942 | __be32 *p; |
c0c077df CL |
943 | u32 len; |
944 | ||
945 | rpcb->r_port = 0; | |
946 | ||
bf269551 | 947 | p = xdr_inline_decode(xdr, 4); |
c0c077df CL |
948 | if (unlikely(p == NULL)) |
949 | goto out_fail; | |
4129ccf3 | 950 | len = be32_to_cpup(p); |
c0c077df CL |
951 | |
952 | /* | |
953 | * If the returned universal address is a null string, | |
954 | * the requested RPC service was not registered. | |
955 | */ | |
956 | if (len == 0) { | |
957 | dprintk("RPC: %5u RPCB reply: program not registered\n", | |
ffa94db6 | 958 | req->rq_task->tk_pid); |
c0c077df CL |
959 | return 0; |
960 | } | |
961 | ||
962 | if (unlikely(len > RPCBIND_MAXUADDRLEN)) | |
963 | goto out_fail; | |
964 | ||
bf269551 | 965 | p = xdr_inline_decode(xdr, len); |
c0c077df CL |
966 | if (unlikely(p == NULL)) |
967 | goto out_fail; | |
ffa94db6 TM |
968 | dprintk("RPC: %5u RPCB_%s reply: %s\n", req->rq_task->tk_pid, |
969 | req->rq_task->tk_msg.rpc_proc->p_name, (char *)p); | |
c0c077df | 970 | |
b030fb0b SK |
971 | if (rpc_uaddr2sockaddr(req->rq_xprt->xprt_net, (char *)p, len, |
972 | sap, sizeof(address)) == 0) | |
c0c077df CL |
973 | goto out_fail; |
974 | rpcb->r_port = rpc_get_port(sap); | |
975 | ||
976 | return 0; | |
977 | ||
978 | out_fail: | |
979 | dprintk("RPC: %5u malformed RPCB_%s reply\n", | |
ffa94db6 TM |
980 | req->rq_task->tk_pid, |
981 | req->rq_task->tk_msg.rpc_proc->p_name); | |
c0c077df CL |
982 | return -EIO; |
983 | } | |
984 | ||
a509050b CL |
985 | /* |
986 | * Not all rpcbind procedures described in RFC 1833 are implemented | |
987 | * since the Linux kernel RPC code requires only these. | |
988 | */ | |
f8b761ef | 989 | |
a509050b | 990 | static struct rpc_procinfo rpcb_procedures2[] = { |
f8b761ef CL |
991 | [RPCBPROC_SET] = { |
992 | .p_proc = RPCBPROC_SET, | |
9f06c719 | 993 | .p_encode = (kxdreproc_t)rpcb_enc_mapping, |
bf269551 | 994 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
995 | .p_arglen = RPCB_mappingargs_sz, |
996 | .p_replen = RPCB_setres_sz, | |
997 | .p_statidx = RPCBPROC_SET, | |
998 | .p_timer = 0, | |
999 | .p_name = "SET", | |
1000 | }, | |
1001 | [RPCBPROC_UNSET] = { | |
1002 | .p_proc = RPCBPROC_UNSET, | |
9f06c719 | 1003 | .p_encode = (kxdreproc_t)rpcb_enc_mapping, |
bf269551 | 1004 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
1005 | .p_arglen = RPCB_mappingargs_sz, |
1006 | .p_replen = RPCB_setres_sz, | |
1007 | .p_statidx = RPCBPROC_UNSET, | |
1008 | .p_timer = 0, | |
1009 | .p_name = "UNSET", | |
1010 | }, | |
1011 | [RPCBPROC_GETPORT] = { | |
1012 | .p_proc = RPCBPROC_GETPORT, | |
9f06c719 | 1013 | .p_encode = (kxdreproc_t)rpcb_enc_mapping, |
bf269551 | 1014 | .p_decode = (kxdrdproc_t)rpcb_dec_getport, |
f8b761ef CL |
1015 | .p_arglen = RPCB_mappingargs_sz, |
1016 | .p_replen = RPCB_getportres_sz, | |
1017 | .p_statidx = RPCBPROC_GETPORT, | |
1018 | .p_timer = 0, | |
1019 | .p_name = "GETPORT", | |
1020 | }, | |
a509050b CL |
1021 | }; |
1022 | ||
1023 | static struct rpc_procinfo rpcb_procedures3[] = { | |
f8b761ef CL |
1024 | [RPCBPROC_SET] = { |
1025 | .p_proc = RPCBPROC_SET, | |
9f06c719 | 1026 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1027 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
1028 | .p_arglen = RPCB_getaddrargs_sz, |
1029 | .p_replen = RPCB_setres_sz, | |
1030 | .p_statidx = RPCBPROC_SET, | |
1031 | .p_timer = 0, | |
1032 | .p_name = "SET", | |
1033 | }, | |
1034 | [RPCBPROC_UNSET] = { | |
1035 | .p_proc = RPCBPROC_UNSET, | |
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_UNSET, | |
1041 | .p_timer = 0, | |
1042 | .p_name = "UNSET", | |
1043 | }, | |
1044 | [RPCBPROC_GETADDR] = { | |
1045 | .p_proc = RPCBPROC_GETADDR, | |
9f06c719 | 1046 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1047 | .p_decode = (kxdrdproc_t)rpcb_dec_getaddr, |
f8b761ef CL |
1048 | .p_arglen = RPCB_getaddrargs_sz, |
1049 | .p_replen = RPCB_getaddrres_sz, | |
1050 | .p_statidx = RPCBPROC_GETADDR, | |
1051 | .p_timer = 0, | |
1052 | .p_name = "GETADDR", | |
1053 | }, | |
a509050b CL |
1054 | }; |
1055 | ||
1056 | static struct rpc_procinfo rpcb_procedures4[] = { | |
f8b761ef CL |
1057 | [RPCBPROC_SET] = { |
1058 | .p_proc = RPCBPROC_SET, | |
9f06c719 | 1059 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1060 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
1061 | .p_arglen = RPCB_getaddrargs_sz, |
1062 | .p_replen = RPCB_setres_sz, | |
1063 | .p_statidx = RPCBPROC_SET, | |
1064 | .p_timer = 0, | |
1065 | .p_name = "SET", | |
1066 | }, | |
1067 | [RPCBPROC_UNSET] = { | |
1068 | .p_proc = RPCBPROC_UNSET, | |
9f06c719 | 1069 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1070 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
f8b761ef CL |
1071 | .p_arglen = RPCB_getaddrargs_sz, |
1072 | .p_replen = RPCB_setres_sz, | |
1073 | .p_statidx = RPCBPROC_UNSET, | |
1074 | .p_timer = 0, | |
1075 | .p_name = "UNSET", | |
1076 | }, | |
1077 | [RPCBPROC_GETADDR] = { | |
1078 | .p_proc = RPCBPROC_GETADDR, | |
9f06c719 | 1079 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
bf269551 | 1080 | .p_decode = (kxdrdproc_t)rpcb_dec_getaddr, |
f8b761ef CL |
1081 | .p_arglen = RPCB_getaddrargs_sz, |
1082 | .p_replen = RPCB_getaddrres_sz, | |
1083 | .p_statidx = RPCBPROC_GETADDR, | |
1084 | .p_timer = 0, | |
1085 | .p_name = "GETADDR", | |
1086 | }, | |
a509050b CL |
1087 | }; |
1088 | ||
a613fa16 | 1089 | static const struct rpcb_info rpcb_next_version[] = { |
fc200e79 CL |
1090 | { |
1091 | .rpc_vers = RPCBVERS_2, | |
1092 | .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT], | |
1093 | }, | |
1094 | { | |
1095 | .rpc_proc = NULL, | |
1096 | }, | |
a509050b CL |
1097 | }; |
1098 | ||
a613fa16 | 1099 | static const struct rpcb_info rpcb_next_version6[] = { |
fc200e79 CL |
1100 | { |
1101 | .rpc_vers = RPCBVERS_4, | |
8842413a | 1102 | .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR], |
fc200e79 CL |
1103 | }, |
1104 | { | |
1105 | .rpc_vers = RPCBVERS_3, | |
1106 | .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR], | |
1107 | }, | |
fc200e79 CL |
1108 | { |
1109 | .rpc_proc = NULL, | |
1110 | }, | |
d5b64430 CL |
1111 | }; |
1112 | ||
a613fa16 | 1113 | static const struct rpc_version rpcb_version2 = { |
fc200e79 | 1114 | .number = RPCBVERS_2, |
1ac7c23e | 1115 | .nrprocs = ARRAY_SIZE(rpcb_procedures2), |
a509050b CL |
1116 | .procs = rpcb_procedures2 |
1117 | }; | |
1118 | ||
a613fa16 | 1119 | static const struct rpc_version rpcb_version3 = { |
fc200e79 | 1120 | .number = RPCBVERS_3, |
1ac7c23e | 1121 | .nrprocs = ARRAY_SIZE(rpcb_procedures3), |
a509050b CL |
1122 | .procs = rpcb_procedures3 |
1123 | }; | |
1124 | ||
a613fa16 | 1125 | static const struct rpc_version rpcb_version4 = { |
fc200e79 | 1126 | .number = RPCBVERS_4, |
1ac7c23e | 1127 | .nrprocs = ARRAY_SIZE(rpcb_procedures4), |
a509050b CL |
1128 | .procs = rpcb_procedures4 |
1129 | }; | |
1130 | ||
a613fa16 | 1131 | static const struct rpc_version *rpcb_version[] = { |
a509050b CL |
1132 | NULL, |
1133 | NULL, | |
1134 | &rpcb_version2, | |
1135 | &rpcb_version3, | |
1136 | &rpcb_version4 | |
1137 | }; | |
1138 | ||
1139 | static struct rpc_stat rpcb_stats; | |
1140 | ||
a613fa16 | 1141 | static const struct rpc_program rpcb_program = { |
a509050b CL |
1142 | .name = "rpcbind", |
1143 | .number = RPCBIND_PROGRAM, | |
1144 | .nrvers = ARRAY_SIZE(rpcb_version), | |
1145 | .version = rpcb_version, | |
1146 | .stats = &rpcb_stats, | |
1147 | }; |