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Commit | Line | Data |
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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 | ||
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 | ||
f895b252 | 35 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
a509050b CL |
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 | ||
499b4988 CH |
131 | static const struct rpc_procinfo rpcb_procedures2[]; |
132 | static const struct rpc_procinfo rpcb_procedures3[]; | |
133 | static const struct rpc_procinfo rpcb_procedures4[]; | |
a509050b | 134 | |
d5b64430 | 135 | struct rpcb_info { |
fc200e79 | 136 | u32 rpc_vers; |
499b4988 | 137 | const 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; |
8fdee4cc | 216 | smp_wmb(); |
dff02d49 | 217 | sn->rpcb_users = 1; |
914edb1b | 218 | dprintk("RPC: created new rpcb local clients (rpcb_local_clnt: " |
6c67a3e4 VA |
219 | "%p, rpcb_local_clnt4: %p) for net %x%s\n", |
220 | sn->rpcb_local_clnt, sn->rpcb_local_clnt4, | |
221 | net->ns.inum, (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 | ||
03a9a42a TM |
358 | static struct rpc_clnt *rpcb_create(struct net *net, const char *nodename, |
359 | const char *hostname, | |
c2550e07 SK |
360 | struct sockaddr *srvaddr, size_t salen, |
361 | int proto, u32 version) | |
a509050b CL |
362 | { |
363 | struct rpc_create_args args = { | |
c2550e07 | 364 | .net = net, |
a509050b CL |
365 | .protocol = proto, |
366 | .address = srvaddr, | |
9f6ad26d | 367 | .addrsize = salen, |
a509050b | 368 | .servername = hostname, |
03a9a42a | 369 | .nodename = nodename, |
a509050b CL |
370 | .program = &rpcb_program, |
371 | .version = version, | |
372 | .authflavor = RPC_AUTH_UNIX, | |
423d8b06 CL |
373 | .flags = (RPC_CLNT_CREATE_NOPING | |
374 | RPC_CLNT_CREATE_NONPRIVPORT), | |
a509050b CL |
375 | }; |
376 | ||
d5b64430 CL |
377 | switch (srvaddr->sa_family) { |
378 | case AF_INET: | |
379 | ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT); | |
380 | break; | |
381 | case AF_INET6: | |
382 | ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT); | |
383 | break; | |
384 | default: | |
c636b572 | 385 | return ERR_PTR(-EAFNOSUPPORT); |
d5b64430 CL |
386 | } |
387 | ||
a509050b CL |
388 | return rpc_create(&args); |
389 | } | |
390 | ||
786615bc | 391 | static int rpcb_register_call(struct sunrpc_net *sn, struct rpc_clnt *clnt, struct rpc_message *msg, bool is_set) |
babe80eb | 392 | { |
786615bc TM |
393 | int flags = RPC_TASK_NOCONNECT; |
394 | int error, result = 0; | |
babe80eb | 395 | |
786615bc TM |
396 | if (is_set || !sn->rpcb_is_af_local) |
397 | flags = RPC_TASK_SOFTCONN; | |
14aeb211 | 398 | msg->rpc_resp = &result; |
babe80eb | 399 | |
786615bc | 400 | error = rpc_call_sync(clnt, msg, flags); |
14aeb211 | 401 | if (error < 0) { |
363f724c | 402 | dprintk("RPC: failed to contact local rpcbind " |
babe80eb | 403 | "server (errno %d).\n", -error); |
14aeb211 CL |
404 | return error; |
405 | } | |
406 | ||
db820d63 | 407 | if (!result) |
14aeb211 | 408 | return -EACCES; |
14aeb211 | 409 | return 0; |
babe80eb CL |
410 | } |
411 | ||
a509050b CL |
412 | /** |
413 | * rpcb_register - set or unset a port registration with the local rpcbind svc | |
bda14606 | 414 | * @net: target network namespace |
a509050b CL |
415 | * @prog: RPC program number to bind |
416 | * @vers: RPC version number to bind | |
c2e1b09f | 417 | * @prot: transport protocol to register |
a509050b | 418 | * @port: port value to register |
14aeb211 CL |
419 | * |
420 | * Returns zero if the registration request was dispatched successfully | |
421 | * and the rpcbind daemon returned success. Otherwise, returns an errno | |
422 | * value that reflects the nature of the error (request could not be | |
423 | * dispatched, timed out, or rpcbind returned an error). | |
c2e1b09f CL |
424 | * |
425 | * RPC services invoke this function to advertise their contact | |
426 | * information via the system's rpcbind daemon. RPC services | |
427 | * invoke this function once for each [program, version, transport] | |
428 | * tuple they wish to advertise. | |
429 | * | |
430 | * Callers may also unregister RPC services that are no longer | |
431 | * available by setting the passed-in port to zero. This removes | |
432 | * all registered transports for [program, version] from the local | |
433 | * rpcbind database. | |
434 | * | |
c2e1b09f CL |
435 | * This function uses rpcbind protocol version 2 to contact the |
436 | * local rpcbind daemon. | |
437 | * | |
438 | * Registration works over both AF_INET and AF_INET6, and services | |
439 | * registered via this function are advertised as available for any | |
440 | * address. If the local rpcbind daemon is listening on AF_INET6, | |
441 | * services registered via this function will be advertised on | |
442 | * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6 | |
443 | * addresses). | |
a509050b | 444 | */ |
977ac315 | 445 | int rpcb_register(struct net *net, u32 prog, u32 vers, int prot, unsigned short port) |
a509050b | 446 | { |
a509050b CL |
447 | struct rpcbind_args map = { |
448 | .r_prog = prog, | |
449 | .r_vers = vers, | |
450 | .r_prot = prot, | |
451 | .r_port = port, | |
452 | }; | |
453 | struct rpc_message msg = { | |
a509050b | 454 | .rpc_argp = &map, |
a509050b | 455 | }; |
977ac315 | 456 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
786615bc | 457 | bool is_set = false; |
a509050b CL |
458 | |
459 | dprintk("RPC: %sregistering (%u, %u, %d, %u) with local " | |
460 | "rpcbind\n", (port ? "" : "un"), | |
461 | prog, vers, prot, port); | |
462 | ||
babe80eb | 463 | msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET]; |
786615bc | 464 | if (port != 0) { |
babe80eb | 465 | msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET]; |
786615bc TM |
466 | is_set = true; |
467 | } | |
a509050b | 468 | |
786615bc | 469 | return rpcb_register_call(sn, sn->rpcb_local_clnt, &msg, is_set); |
a509050b CL |
470 | } |
471 | ||
c2e1b09f CL |
472 | /* |
473 | * Fill in AF_INET family-specific arguments to register | |
474 | */ | |
1a114a66 SK |
475 | static int rpcb_register_inet4(struct sunrpc_net *sn, |
476 | const struct sockaddr *sap, | |
1673d0de | 477 | struct rpc_message *msg) |
c2e1b09f | 478 | { |
3aba4553 | 479 | const struct sockaddr_in *sin = (const struct sockaddr_in *)sap; |
c2e1b09f | 480 | struct rpcbind_args *map = msg->rpc_argp; |
3aba4553 | 481 | unsigned short port = ntohs(sin->sin_port); |
786615bc | 482 | bool is_set = false; |
ba809130 | 483 | int result; |
c2e1b09f | 484 | |
d77385f2 | 485 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL); |
c2e1b09f CL |
486 | |
487 | dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with " | |
488 | "local rpcbind\n", (port ? "" : "un"), | |
489 | map->r_prog, map->r_vers, | |
490 | map->r_addr, map->r_netid); | |
491 | ||
492 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; | |
786615bc | 493 | if (port != 0) { |
c2e1b09f | 494 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET]; |
786615bc TM |
495 | is_set = true; |
496 | } | |
c2e1b09f | 497 | |
786615bc | 498 | result = rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, is_set); |
ba809130 CL |
499 | kfree(map->r_addr); |
500 | return result; | |
c2e1b09f CL |
501 | } |
502 | ||
503 | /* | |
504 | * Fill in AF_INET6 family-specific arguments to register | |
505 | */ | |
1a114a66 SK |
506 | static int rpcb_register_inet6(struct sunrpc_net *sn, |
507 | const struct sockaddr *sap, | |
1673d0de | 508 | struct rpc_message *msg) |
c2e1b09f | 509 | { |
3aba4553 | 510 | const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap; |
c2e1b09f | 511 | struct rpcbind_args *map = msg->rpc_argp; |
3aba4553 | 512 | unsigned short port = ntohs(sin6->sin6_port); |
786615bc | 513 | bool is_set = false; |
ba809130 | 514 | int result; |
c2e1b09f | 515 | |
d77385f2 | 516 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL); |
c2e1b09f CL |
517 | |
518 | dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with " | |
519 | "local rpcbind\n", (port ? "" : "un"), | |
520 | map->r_prog, map->r_vers, | |
521 | map->r_addr, map->r_netid); | |
522 | ||
523 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; | |
786615bc | 524 | if (port != 0) { |
c2e1b09f | 525 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET]; |
786615bc TM |
526 | is_set = true; |
527 | } | |
c2e1b09f | 528 | |
786615bc | 529 | result = rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, is_set); |
ba809130 CL |
530 | kfree(map->r_addr); |
531 | return result; | |
c2e1b09f CL |
532 | } |
533 | ||
1a114a66 SK |
534 | static int rpcb_unregister_all_protofamilies(struct sunrpc_net *sn, |
535 | struct rpc_message *msg) | |
1673d0de CL |
536 | { |
537 | struct rpcbind_args *map = msg->rpc_argp; | |
538 | ||
539 | dprintk("RPC: unregistering [%u, %u, '%s'] with " | |
540 | "local rpcbind\n", | |
541 | map->r_prog, map->r_vers, map->r_netid); | |
542 | ||
543 | map->r_addr = ""; | |
544 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; | |
545 | ||
786615bc | 546 | return rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, false); |
1673d0de CL |
547 | } |
548 | ||
c2e1b09f CL |
549 | /** |
550 | * rpcb_v4_register - set or unset a port registration with the local rpcbind | |
bda14606 | 551 | * @net: target network namespace |
c2e1b09f CL |
552 | * @program: RPC program number of service to (un)register |
553 | * @version: RPC version number of service to (un)register | |
554 | * @address: address family, IP address, and port to (un)register | |
555 | * @netid: netid of transport protocol to (un)register | |
14aeb211 CL |
556 | * |
557 | * Returns zero if the registration request was dispatched successfully | |
558 | * and the rpcbind daemon returned success. Otherwise, returns an errno | |
559 | * value that reflects the nature of the error (request could not be | |
560 | * dispatched, timed out, or rpcbind returned an error). | |
c2e1b09f CL |
561 | * |
562 | * RPC services invoke this function to advertise their contact | |
563 | * information via the system's rpcbind daemon. RPC services | |
564 | * invoke this function once for each [program, version, address, | |
565 | * netid] tuple they wish to advertise. | |
566 | * | |
1673d0de CL |
567 | * Callers may also unregister RPC services that are registered at a |
568 | * specific address by setting the port number in @address to zero. | |
569 | * They may unregister all registered protocol families at once for | |
570 | * a service by passing a NULL @address argument. If @netid is "" | |
571 | * then all netids for [program, version, address] are unregistered. | |
c2e1b09f | 572 | * |
c2e1b09f CL |
573 | * This function uses rpcbind protocol version 4 to contact the |
574 | * local rpcbind daemon. The local rpcbind daemon must support | |
575 | * version 4 of the rpcbind protocol in order for these functions | |
576 | * to register a service successfully. | |
577 | * | |
578 | * Supported netids include "udp" and "tcp" for UDP and TCP over | |
579 | * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6, | |
580 | * respectively. | |
581 | * | |
582 | * The contents of @address determine the address family and the | |
583 | * port to be registered. The usual practice is to pass INADDR_ANY | |
584 | * as the raw address, but specifying a non-zero address is also | |
585 | * supported by this API if the caller wishes to advertise an RPC | |
586 | * service on a specific network interface. | |
587 | * | |
588 | * Note that passing in INADDR_ANY does not create the same service | |
589 | * registration as IN6ADDR_ANY. The former advertises an RPC | |
590 | * service on any IPv4 address, but not on IPv6. The latter | |
591 | * advertises the service on all IPv4 and IPv6 addresses. | |
592 | */ | |
977ac315 | 593 | int rpcb_v4_register(struct net *net, const u32 program, const u32 version, |
14aeb211 | 594 | const struct sockaddr *address, const char *netid) |
c2e1b09f CL |
595 | { |
596 | struct rpcbind_args map = { | |
597 | .r_prog = program, | |
598 | .r_vers = version, | |
599 | .r_netid = netid, | |
600 | .r_owner = RPCB_OWNER_STRING, | |
601 | }; | |
602 | struct rpc_message msg = { | |
603 | .rpc_argp = &map, | |
c2e1b09f | 604 | }; |
977ac315 | 605 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
c526611d | 606 | |
dff02d49 | 607 | if (sn->rpcb_local_clnt4 == NULL) |
c526611d | 608 | return -EPROTONOSUPPORT; |
c2e1b09f | 609 | |
1673d0de | 610 | if (address == NULL) |
1a114a66 | 611 | return rpcb_unregister_all_protofamilies(sn, &msg); |
1673d0de | 612 | |
c2e1b09f CL |
613 | switch (address->sa_family) { |
614 | case AF_INET: | |
1a114a66 | 615 | return rpcb_register_inet4(sn, address, &msg); |
c2e1b09f | 616 | case AF_INET6: |
1a114a66 | 617 | return rpcb_register_inet6(sn, address, &msg); |
c2e1b09f CL |
618 | } |
619 | ||
620 | return -EAFNOSUPPORT; | |
621 | } | |
622 | ||
499b4988 CH |
623 | static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, |
624 | struct rpcbind_args *map, const struct rpc_procinfo *proc) | |
5138fde0 TM |
625 | { |
626 | struct rpc_message msg = { | |
803a9067 | 627 | .rpc_proc = proc, |
5138fde0 | 628 | .rpc_argp = map, |
c0c077df | 629 | .rpc_resp = map, |
5138fde0 TM |
630 | }; |
631 | struct rpc_task_setup task_setup_data = { | |
632 | .rpc_client = rpcb_clnt, | |
633 | .rpc_message = &msg, | |
634 | .callback_ops = &rpcb_getport_ops, | |
635 | .callback_data = map, | |
012da158 | 636 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN, |
5138fde0 TM |
637 | }; |
638 | ||
639 | return rpc_run_task(&task_setup_data); | |
640 | } | |
641 | ||
9a4bd29f TM |
642 | /* |
643 | * In the case where rpc clients have been cloned, we want to make | |
644 | * sure that we use the program number/version etc of the actual | |
645 | * owner of the xprt. To do so, we walk back up the tree of parents | |
646 | * to find whoever created the transport and/or whoever has the | |
647 | * autobind flag set. | |
648 | */ | |
649 | static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt) | |
650 | { | |
651 | struct rpc_clnt *parent = clnt->cl_parent; | |
ad01b2c6 | 652 | struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch); |
9a4bd29f TM |
653 | |
654 | while (parent != clnt) { | |
ad01b2c6 | 655 | if (rcu_access_pointer(parent->cl_xpi.xpi_xpswitch) != xps) |
9a4bd29f TM |
656 | break; |
657 | if (clnt->cl_autobind) | |
658 | break; | |
659 | clnt = parent; | |
660 | parent = parent->cl_parent; | |
661 | } | |
662 | return clnt; | |
663 | } | |
664 | ||
a509050b | 665 | /** |
45160d62 | 666 | * rpcb_getport_async - obtain the port for a given RPC service on a given host |
a509050b CL |
667 | * @task: task that is waiting for portmapper request |
668 | * | |
669 | * This one can be called for an ongoing RPC request, and can be used in | |
670 | * an async (rpciod) context. | |
671 | */ | |
45160d62 | 672 | void rpcb_getport_async(struct rpc_task *task) |
a509050b | 673 | { |
9a4bd29f | 674 | struct rpc_clnt *clnt; |
499b4988 | 675 | const struct rpc_procinfo *proc; |
0a48f5d7 | 676 | u32 bind_version; |
9a4bd29f | 677 | struct rpc_xprt *xprt; |
a509050b | 678 | struct rpc_clnt *rpcb_clnt; |
ec0dd267 | 679 | struct rpcbind_args *map; |
a509050b | 680 | struct rpc_task *child; |
9f6ad26d CL |
681 | struct sockaddr_storage addr; |
682 | struct sockaddr *sap = (struct sockaddr *)&addr; | |
683 | size_t salen; | |
a509050b CL |
684 | int status; |
685 | ||
2446ab60 | 686 | rcu_read_lock(); |
fb43d172 | 687 | clnt = rpcb_find_transport_owner(task->tk_client); |
2446ab60 | 688 | rcu_read_unlock(); |
fb43d172 | 689 | xprt = xprt_get(task->tk_xprt); |
9a4bd29f | 690 | |
45160d62 | 691 | dprintk("RPC: %5u %s(%s, %u, %u, %d)\n", |
0dc47877 | 692 | task->tk_pid, __func__, |
4e0038b6 | 693 | xprt->servername, clnt->cl_prog, clnt->cl_vers, xprt->prot); |
a509050b | 694 | |
381ba74a TM |
695 | /* Put self on the wait queue to ensure we get notified if |
696 | * some other task is already attempting to bind the port */ | |
697 | rpc_sleep_on(&xprt->binding, task, NULL); | |
698 | ||
a509050b | 699 | if (xprt_test_and_set_binding(xprt)) { |
45160d62 | 700 | dprintk("RPC: %5u %s: waiting for another binder\n", |
0dc47877 | 701 | task->tk_pid, __func__); |
2446ab60 | 702 | xprt_put(xprt); |
381ba74a | 703 | return; |
a509050b CL |
704 | } |
705 | ||
a509050b CL |
706 | /* Someone else may have bound if we slept */ |
707 | if (xprt_bound(xprt)) { | |
708 | status = 0; | |
45160d62 | 709 | dprintk("RPC: %5u %s: already bound\n", |
0dc47877 | 710 | task->tk_pid, __func__); |
a509050b CL |
711 | goto bailout_nofree; |
712 | } | |
713 | ||
ba809130 | 714 | /* Parent transport's destination address */ |
9f6ad26d | 715 | salen = rpc_peeraddr(clnt, sap, sizeof(addr)); |
d5b64430 CL |
716 | |
717 | /* Don't ever use rpcbind v2 for AF_INET6 requests */ | |
9f6ad26d | 718 | switch (sap->sa_family) { |
d5b64430 | 719 | case AF_INET: |
803a9067 TM |
720 | proc = rpcb_next_version[xprt->bind_index].rpc_proc; |
721 | bind_version = rpcb_next_version[xprt->bind_index].rpc_vers; | |
d5b64430 CL |
722 | break; |
723 | case AF_INET6: | |
803a9067 TM |
724 | proc = rpcb_next_version6[xprt->bind_index].rpc_proc; |
725 | bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers; | |
d5b64430 CL |
726 | break; |
727 | default: | |
728 | status = -EAFNOSUPPORT; | |
729 | dprintk("RPC: %5u %s: bad address family\n", | |
0dc47877 | 730 | task->tk_pid, __func__); |
d5b64430 CL |
731 | goto bailout_nofree; |
732 | } | |
803a9067 | 733 | if (proc == NULL) { |
a509050b | 734 | xprt->bind_index = 0; |
906462af | 735 | status = -EPFNOSUPPORT; |
45160d62 | 736 | dprintk("RPC: %5u %s: no more getport versions available\n", |
0dc47877 | 737 | task->tk_pid, __func__); |
a509050b CL |
738 | goto bailout_nofree; |
739 | } | |
a509050b | 740 | |
45160d62 | 741 | dprintk("RPC: %5u %s: trying rpcbind version %u\n", |
0dc47877 | 742 | task->tk_pid, __func__, bind_version); |
a509050b | 743 | |
03a9a42a TM |
744 | rpcb_clnt = rpcb_create(xprt->xprt_net, |
745 | clnt->cl_nodename, | |
746 | xprt->servername, sap, salen, | |
c2550e07 | 747 | xprt->prot, bind_version); |
143b6c40 CL |
748 | if (IS_ERR(rpcb_clnt)) { |
749 | status = PTR_ERR(rpcb_clnt); | |
750 | dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n", | |
0dc47877 | 751 | task->tk_pid, __func__, PTR_ERR(rpcb_clnt)); |
143b6c40 CL |
752 | goto bailout_nofree; |
753 | } | |
754 | ||
cb24e35b | 755 | map = kzalloc(sizeof(struct rpcbind_args), GFP_NOFS); |
a509050b CL |
756 | if (!map) { |
757 | status = -ENOMEM; | |
45160d62 | 758 | dprintk("RPC: %5u %s: no memory available\n", |
0dc47877 | 759 | task->tk_pid, __func__); |
96165e2b | 760 | goto bailout_release_client; |
a509050b CL |
761 | } |
762 | map->r_prog = clnt->cl_prog; | |
763 | map->r_vers = clnt->cl_vers; | |
764 | map->r_prot = xprt->prot; | |
765 | map->r_port = 0; | |
864cf9bf | 766 | map->r_xprt = xprt; |
381ba74a | 767 | map->r_status = -EIO; |
a509050b | 768 | |
ba809130 CL |
769 | switch (bind_version) { |
770 | case RPCBVERS_4: | |
771 | case RPCBVERS_3: | |
2446ab60 | 772 | map->r_netid = xprt->address_strings[RPC_DISPLAY_NETID]; |
cb24e35b | 773 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_NOFS); |
81c88b18 BF |
774 | if (!map->r_addr) { |
775 | status = -ENOMEM; | |
776 | dprintk("RPC: %5u %s: no memory available\n", | |
777 | task->tk_pid, __func__); | |
778 | goto bailout_free_args; | |
779 | } | |
ba809130 CL |
780 | map->r_owner = ""; |
781 | break; | |
782 | case RPCBVERS_2: | |
783 | map->r_addr = NULL; | |
784 | break; | |
785 | default: | |
786 | BUG(); | |
787 | } | |
788 | ||
803a9067 | 789 | child = rpcb_call_async(rpcb_clnt, map, proc); |
4c402b40 | 790 | rpc_release_client(rpcb_clnt); |
a509050b | 791 | if (IS_ERR(child)) { |
0d3a34b4 | 792 | /* rpcb_map_release() has freed the arguments */ |
45160d62 | 793 | dprintk("RPC: %5u %s: rpc_run_task failed\n", |
0dc47877 | 794 | task->tk_pid, __func__); |
381ba74a | 795 | return; |
a509050b | 796 | } |
a509050b | 797 | |
9a4bd29f TM |
798 | xprt->stat.bind_count++; |
799 | rpc_put_task(child); | |
a509050b CL |
800 | return; |
801 | ||
81c88b18 BF |
802 | bailout_free_args: |
803 | kfree(map); | |
96165e2b TM |
804 | bailout_release_client: |
805 | rpc_release_client(rpcb_clnt); | |
a509050b CL |
806 | bailout_nofree: |
807 | rpcb_wake_rpcbind_waiters(xprt, status); | |
a509050b | 808 | task->tk_status = status; |
2446ab60 | 809 | xprt_put(xprt); |
a509050b | 810 | } |
12444809 | 811 | EXPORT_SYMBOL_GPL(rpcb_getport_async); |
a509050b CL |
812 | |
813 | /* | |
814 | * Rpcbind child task calls this callback via tk_exit. | |
815 | */ | |
816 | static void rpcb_getport_done(struct rpc_task *child, void *data) | |
817 | { | |
818 | struct rpcbind_args *map = data; | |
819 | struct rpc_xprt *xprt = map->r_xprt; | |
820 | int status = child->tk_status; | |
821 | ||
4784cb51 CL |
822 | /* Garbage reply: retry with a lesser rpcbind version */ |
823 | if (status == -EIO) | |
824 | status = -EPROTONOSUPPORT; | |
825 | ||
a509050b CL |
826 | /* rpcbind server doesn't support this rpcbind protocol version */ |
827 | if (status == -EPROTONOSUPPORT) | |
828 | xprt->bind_index++; | |
829 | ||
830 | if (status < 0) { | |
831 | /* rpcbind server not available on remote host? */ | |
832 | xprt->ops->set_port(xprt, 0); | |
833 | } else if (map->r_port == 0) { | |
834 | /* Requested RPC service wasn't registered on remote host */ | |
835 | xprt->ops->set_port(xprt, 0); | |
836 | status = -EACCES; | |
837 | } else { | |
838 | /* Succeeded */ | |
839 | xprt->ops->set_port(xprt, map->r_port); | |
840 | xprt_set_bound(xprt); | |
841 | status = 0; | |
842 | } | |
843 | ||
844 | dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n", | |
845 | child->tk_pid, status, map->r_port); | |
846 | ||
381ba74a | 847 | map->r_status = status; |
a509050b CL |
848 | } |
849 | ||
166b88d7 CL |
850 | /* |
851 | * XDR functions for rpcbind | |
852 | */ | |
853 | ||
9f06c719 | 854 | static void rpcb_enc_mapping(struct rpc_rqst *req, struct xdr_stream *xdr, |
7d55f7fe | 855 | const void *data) |
6f2c2db7 | 856 | { |
7d55f7fe | 857 | const struct rpcbind_args *rpcb = data; |
9f06c719 | 858 | __be32 *p; |
6f2c2db7 CL |
859 | |
860 | dprintk("RPC: %5u encoding PMAP_%s call (%u, %u, %d, %u)\n", | |
ffa94db6 TM |
861 | req->rq_task->tk_pid, |
862 | req->rq_task->tk_msg.rpc_proc->p_name, | |
6f2c2db7 CL |
863 | rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port); |
864 | ||
9f06c719 | 865 | p = xdr_reserve_space(xdr, RPCB_mappingargs_sz << 2); |
4129ccf3 CL |
866 | *p++ = cpu_to_be32(rpcb->r_prog); |
867 | *p++ = cpu_to_be32(rpcb->r_vers); | |
868 | *p++ = cpu_to_be32(rpcb->r_prot); | |
869 | *p = cpu_to_be32(rpcb->r_port); | |
6f2c2db7 CL |
870 | } |
871 | ||
bf269551 | 872 | static int rpcb_dec_getport(struct rpc_rqst *req, struct xdr_stream *xdr, |
605d712f | 873 | void *data) |
c0c077df | 874 | { |
605d712f | 875 | struct rpcbind_args *rpcb = data; |
c0c077df | 876 | unsigned long port; |
bf269551 | 877 | __be32 *p; |
c0c077df CL |
878 | |
879 | rpcb->r_port = 0; | |
880 | ||
bf269551 | 881 | p = xdr_inline_decode(xdr, 4); |
c0c077df CL |
882 | if (unlikely(p == NULL)) |
883 | return -EIO; | |
884 | ||
4129ccf3 | 885 | port = be32_to_cpup(p); |
ffa94db6 TM |
886 | dprintk("RPC: %5u PMAP_%s result: %lu\n", req->rq_task->tk_pid, |
887 | req->rq_task->tk_msg.rpc_proc->p_name, port); | |
4be929be | 888 | if (unlikely(port > USHRT_MAX)) |
c0c077df CL |
889 | return -EIO; |
890 | ||
891 | rpcb->r_port = port; | |
892 | return 0; | |
893 | } | |
894 | ||
bf269551 | 895 | static int rpcb_dec_set(struct rpc_rqst *req, struct xdr_stream *xdr, |
605d712f | 896 | void *data) |
7ed0ff98 | 897 | { |
605d712f | 898 | unsigned int *boolp = data; |
bf269551 | 899 | __be32 *p; |
7ed0ff98 | 900 | |
bf269551 | 901 | p = xdr_inline_decode(xdr, 4); |
7ed0ff98 CL |
902 | if (unlikely(p == NULL)) |
903 | return -EIO; | |
904 | ||
905 | *boolp = 0; | |
bf269551 | 906 | if (*p != xdr_zero) |
7ed0ff98 CL |
907 | *boolp = 1; |
908 | ||
909 | dprintk("RPC: %5u RPCB_%s call %s\n", | |
ffa94db6 TM |
910 | req->rq_task->tk_pid, |
911 | req->rq_task->tk_msg.rpc_proc->p_name, | |
7ed0ff98 CL |
912 | (*boolp ? "succeeded" : "failed")); |
913 | return 0; | |
914 | } | |
915 | ||
4129ccf3 CL |
916 | static void encode_rpcb_string(struct xdr_stream *xdr, const char *string, |
917 | const u32 maxstrlen) | |
6f2c2db7 | 918 | { |
6f2c2db7 | 919 | __be32 *p; |
4129ccf3 | 920 | u32 len; |
6f2c2db7 | 921 | |
6f2c2db7 | 922 | len = strlen(string); |
332e008a WAA |
923 | WARN_ON_ONCE(len > maxstrlen); |
924 | if (len > maxstrlen) | |
925 | /* truncate and hope for the best */ | |
926 | len = maxstrlen; | |
4129ccf3 | 927 | p = xdr_reserve_space(xdr, 4 + len); |
6f2c2db7 | 928 | xdr_encode_opaque(p, string, len); |
6f2c2db7 CL |
929 | } |
930 | ||
9f06c719 | 931 | static void rpcb_enc_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr, |
7d55f7fe | 932 | const void *data) |
6f2c2db7 | 933 | { |
7d55f7fe | 934 | const struct rpcbind_args *rpcb = data; |
9f06c719 | 935 | __be32 *p; |
6f2c2db7 CL |
936 | |
937 | dprintk("RPC: %5u encoding RPCB_%s call (%u, %u, '%s', '%s')\n", | |
ffa94db6 TM |
938 | req->rq_task->tk_pid, |
939 | req->rq_task->tk_msg.rpc_proc->p_name, | |
6f2c2db7 CL |
940 | rpcb->r_prog, rpcb->r_vers, |
941 | rpcb->r_netid, rpcb->r_addr); | |
942 | ||
9f06c719 | 943 | p = xdr_reserve_space(xdr, (RPCB_program_sz + RPCB_version_sz) << 2); |
4129ccf3 CL |
944 | *p++ = cpu_to_be32(rpcb->r_prog); |
945 | *p = cpu_to_be32(rpcb->r_vers); | |
6f2c2db7 | 946 | |
9f06c719 CL |
947 | encode_rpcb_string(xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN); |
948 | encode_rpcb_string(xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN); | |
949 | encode_rpcb_string(xdr, rpcb->r_owner, RPCB_MAXOWNERLEN); | |
6f2c2db7 CL |
950 | } |
951 | ||
bf269551 | 952 | static int rpcb_dec_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr, |
605d712f | 953 | void *data) |
c0c077df | 954 | { |
605d712f | 955 | struct rpcbind_args *rpcb = data; |
c0c077df CL |
956 | struct sockaddr_storage address; |
957 | struct sockaddr *sap = (struct sockaddr *)&address; | |
bf269551 | 958 | __be32 *p; |
c0c077df CL |
959 | u32 len; |
960 | ||
961 | rpcb->r_port = 0; | |
962 | ||
bf269551 | 963 | p = xdr_inline_decode(xdr, 4); |
c0c077df CL |
964 | if (unlikely(p == NULL)) |
965 | goto out_fail; | |
4129ccf3 | 966 | len = be32_to_cpup(p); |
c0c077df CL |
967 | |
968 | /* | |
969 | * If the returned universal address is a null string, | |
970 | * the requested RPC service was not registered. | |
971 | */ | |
972 | if (len == 0) { | |
973 | dprintk("RPC: %5u RPCB reply: program not registered\n", | |
ffa94db6 | 974 | req->rq_task->tk_pid); |
c0c077df CL |
975 | return 0; |
976 | } | |
977 | ||
978 | if (unlikely(len > RPCBIND_MAXUADDRLEN)) | |
979 | goto out_fail; | |
980 | ||
bf269551 | 981 | p = xdr_inline_decode(xdr, len); |
c0c077df CL |
982 | if (unlikely(p == NULL)) |
983 | goto out_fail; | |
ffa94db6 TM |
984 | dprintk("RPC: %5u RPCB_%s reply: %s\n", req->rq_task->tk_pid, |
985 | req->rq_task->tk_msg.rpc_proc->p_name, (char *)p); | |
c0c077df | 986 | |
b030fb0b SK |
987 | if (rpc_uaddr2sockaddr(req->rq_xprt->xprt_net, (char *)p, len, |
988 | sap, sizeof(address)) == 0) | |
c0c077df CL |
989 | goto out_fail; |
990 | rpcb->r_port = rpc_get_port(sap); | |
991 | ||
992 | return 0; | |
993 | ||
994 | out_fail: | |
995 | dprintk("RPC: %5u malformed RPCB_%s reply\n", | |
ffa94db6 TM |
996 | req->rq_task->tk_pid, |
997 | req->rq_task->tk_msg.rpc_proc->p_name); | |
c0c077df CL |
998 | return -EIO; |
999 | } | |
1000 | ||
a509050b CL |
1001 | /* |
1002 | * Not all rpcbind procedures described in RFC 1833 are implemented | |
1003 | * since the Linux kernel RPC code requires only these. | |
1004 | */ | |
f8b761ef | 1005 | |
499b4988 | 1006 | static const struct rpc_procinfo rpcb_procedures2[] = { |
f8b761ef CL |
1007 | [RPCBPROC_SET] = { |
1008 | .p_proc = RPCBPROC_SET, | |
7d55f7fe | 1009 | .p_encode = rpcb_enc_mapping, |
605d712f | 1010 | .p_decode = rpcb_dec_set, |
f8b761ef CL |
1011 | .p_arglen = RPCB_mappingargs_sz, |
1012 | .p_replen = RPCB_setres_sz, | |
1013 | .p_statidx = RPCBPROC_SET, | |
1014 | .p_timer = 0, | |
1015 | .p_name = "SET", | |
1016 | }, | |
1017 | [RPCBPROC_UNSET] = { | |
1018 | .p_proc = RPCBPROC_UNSET, | |
7d55f7fe | 1019 | .p_encode = rpcb_enc_mapping, |
605d712f | 1020 | .p_decode = rpcb_dec_set, |
f8b761ef CL |
1021 | .p_arglen = RPCB_mappingargs_sz, |
1022 | .p_replen = RPCB_setres_sz, | |
1023 | .p_statidx = RPCBPROC_UNSET, | |
1024 | .p_timer = 0, | |
1025 | .p_name = "UNSET", | |
1026 | }, | |
1027 | [RPCBPROC_GETPORT] = { | |
1028 | .p_proc = RPCBPROC_GETPORT, | |
7d55f7fe | 1029 | .p_encode = rpcb_enc_mapping, |
605d712f | 1030 | .p_decode = rpcb_dec_getport, |
f8b761ef CL |
1031 | .p_arglen = RPCB_mappingargs_sz, |
1032 | .p_replen = RPCB_getportres_sz, | |
1033 | .p_statidx = RPCBPROC_GETPORT, | |
1034 | .p_timer = 0, | |
1035 | .p_name = "GETPORT", | |
1036 | }, | |
a509050b CL |
1037 | }; |
1038 | ||
499b4988 | 1039 | static const struct rpc_procinfo rpcb_procedures3[] = { |
f8b761ef CL |
1040 | [RPCBPROC_SET] = { |
1041 | .p_proc = RPCBPROC_SET, | |
7d55f7fe | 1042 | .p_encode = rpcb_enc_getaddr, |
605d712f | 1043 | .p_decode = rpcb_dec_set, |
f8b761ef CL |
1044 | .p_arglen = RPCB_getaddrargs_sz, |
1045 | .p_replen = RPCB_setres_sz, | |
1046 | .p_statidx = RPCBPROC_SET, | |
1047 | .p_timer = 0, | |
1048 | .p_name = "SET", | |
1049 | }, | |
1050 | [RPCBPROC_UNSET] = { | |
1051 | .p_proc = RPCBPROC_UNSET, | |
7d55f7fe | 1052 | .p_encode = rpcb_enc_getaddr, |
605d712f | 1053 | .p_decode = rpcb_dec_set, |
f8b761ef CL |
1054 | .p_arglen = RPCB_getaddrargs_sz, |
1055 | .p_replen = RPCB_setres_sz, | |
1056 | .p_statidx = RPCBPROC_UNSET, | |
1057 | .p_timer = 0, | |
1058 | .p_name = "UNSET", | |
1059 | }, | |
1060 | [RPCBPROC_GETADDR] = { | |
1061 | .p_proc = RPCBPROC_GETADDR, | |
7d55f7fe | 1062 | .p_encode = rpcb_enc_getaddr, |
605d712f | 1063 | .p_decode = rpcb_dec_getaddr, |
f8b761ef CL |
1064 | .p_arglen = RPCB_getaddrargs_sz, |
1065 | .p_replen = RPCB_getaddrres_sz, | |
1066 | .p_statidx = RPCBPROC_GETADDR, | |
1067 | .p_timer = 0, | |
1068 | .p_name = "GETADDR", | |
1069 | }, | |
a509050b CL |
1070 | }; |
1071 | ||
499b4988 | 1072 | static const struct rpc_procinfo rpcb_procedures4[] = { |
f8b761ef CL |
1073 | [RPCBPROC_SET] = { |
1074 | .p_proc = RPCBPROC_SET, | |
7d55f7fe | 1075 | .p_encode = rpcb_enc_getaddr, |
605d712f | 1076 | .p_decode = rpcb_dec_set, |
f8b761ef CL |
1077 | .p_arglen = RPCB_getaddrargs_sz, |
1078 | .p_replen = RPCB_setres_sz, | |
1079 | .p_statidx = RPCBPROC_SET, | |
1080 | .p_timer = 0, | |
1081 | .p_name = "SET", | |
1082 | }, | |
1083 | [RPCBPROC_UNSET] = { | |
1084 | .p_proc = RPCBPROC_UNSET, | |
7d55f7fe | 1085 | .p_encode = rpcb_enc_getaddr, |
605d712f | 1086 | .p_decode = rpcb_dec_set, |
f8b761ef CL |
1087 | .p_arglen = RPCB_getaddrargs_sz, |
1088 | .p_replen = RPCB_setres_sz, | |
1089 | .p_statidx = RPCBPROC_UNSET, | |
1090 | .p_timer = 0, | |
1091 | .p_name = "UNSET", | |
1092 | }, | |
1093 | [RPCBPROC_GETADDR] = { | |
1094 | .p_proc = RPCBPROC_GETADDR, | |
7d55f7fe | 1095 | .p_encode = rpcb_enc_getaddr, |
605d712f | 1096 | .p_decode = rpcb_dec_getaddr, |
f8b761ef CL |
1097 | .p_arglen = RPCB_getaddrargs_sz, |
1098 | .p_replen = RPCB_getaddrres_sz, | |
1099 | .p_statidx = RPCBPROC_GETADDR, | |
1100 | .p_timer = 0, | |
1101 | .p_name = "GETADDR", | |
1102 | }, | |
a509050b CL |
1103 | }; |
1104 | ||
a613fa16 | 1105 | static const struct rpcb_info rpcb_next_version[] = { |
fc200e79 CL |
1106 | { |
1107 | .rpc_vers = RPCBVERS_2, | |
1108 | .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT], | |
1109 | }, | |
1110 | { | |
1111 | .rpc_proc = NULL, | |
1112 | }, | |
a509050b CL |
1113 | }; |
1114 | ||
a613fa16 | 1115 | static const struct rpcb_info rpcb_next_version6[] = { |
fc200e79 CL |
1116 | { |
1117 | .rpc_vers = RPCBVERS_4, | |
8842413a | 1118 | .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR], |
fc200e79 CL |
1119 | }, |
1120 | { | |
1121 | .rpc_vers = RPCBVERS_3, | |
1122 | .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR], | |
1123 | }, | |
fc200e79 CL |
1124 | { |
1125 | .rpc_proc = NULL, | |
1126 | }, | |
d5b64430 CL |
1127 | }; |
1128 | ||
1c5876dd | 1129 | static unsigned int rpcb_version2_counts[ARRAY_SIZE(rpcb_procedures2)]; |
a613fa16 | 1130 | static const struct rpc_version rpcb_version2 = { |
fc200e79 | 1131 | .number = RPCBVERS_2, |
1ac7c23e | 1132 | .nrprocs = ARRAY_SIZE(rpcb_procedures2), |
1c5876dd CH |
1133 | .procs = rpcb_procedures2, |
1134 | .counts = rpcb_version2_counts, | |
a509050b CL |
1135 | }; |
1136 | ||
1c5876dd | 1137 | static unsigned int rpcb_version3_counts[ARRAY_SIZE(rpcb_procedures3)]; |
a613fa16 | 1138 | static const struct rpc_version rpcb_version3 = { |
fc200e79 | 1139 | .number = RPCBVERS_3, |
1ac7c23e | 1140 | .nrprocs = ARRAY_SIZE(rpcb_procedures3), |
1c5876dd CH |
1141 | .procs = rpcb_procedures3, |
1142 | .counts = rpcb_version3_counts, | |
a509050b CL |
1143 | }; |
1144 | ||
1c5876dd | 1145 | static unsigned int rpcb_version4_counts[ARRAY_SIZE(rpcb_procedures4)]; |
a613fa16 | 1146 | static const struct rpc_version rpcb_version4 = { |
fc200e79 | 1147 | .number = RPCBVERS_4, |
1ac7c23e | 1148 | .nrprocs = ARRAY_SIZE(rpcb_procedures4), |
1c5876dd CH |
1149 | .procs = rpcb_procedures4, |
1150 | .counts = rpcb_version4_counts, | |
a509050b CL |
1151 | }; |
1152 | ||
a613fa16 | 1153 | static const struct rpc_version *rpcb_version[] = { |
a509050b CL |
1154 | NULL, |
1155 | NULL, | |
1156 | &rpcb_version2, | |
1157 | &rpcb_version3, | |
1158 | &rpcb_version4 | |
1159 | }; | |
1160 | ||
1161 | static struct rpc_stat rpcb_stats; | |
1162 | ||
a613fa16 | 1163 | static const struct rpc_program rpcb_program = { |
a509050b CL |
1164 | .name = "rpcbind", |
1165 | .number = RPCBIND_PROGRAM, | |
1166 | .nrvers = ARRAY_SIZE(rpcb_version), | |
1167 | .version = rpcb_version, | |
1168 | .stats = &rpcb_stats, | |
1169 | }; |