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-rw-r--r--net/sunrpc/pmap_clnt.c383
1 files changed, 0 insertions, 383 deletions
diff --git a/net/sunrpc/pmap_clnt.c b/net/sunrpc/pmap_clnt.c
deleted file mode 100644
index d9f765344589..000000000000
--- a/net/sunrpc/pmap_clnt.c
+++ /dev/null
@@ -1,383 +0,0 @@
1/*
2 * linux/net/sunrpc/pmap_clnt.c
3 *
4 * In-kernel RPC portmapper client.
5 *
6 * Portmapper supports version 2 of the rpcbind protocol (RFC 1833).
7 *
8 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
9 */
10
11#include <linux/types.h>
12#include <linux/socket.h>
13#include <linux/kernel.h>
14#include <linux/errno.h>
15#include <linux/uio.h>
16#include <linux/in.h>
17#include <linux/sunrpc/clnt.h>
18#include <linux/sunrpc/sched.h>
19
20#ifdef RPC_DEBUG
21# define RPCDBG_FACILITY RPCDBG_PMAP
22#endif
23
24#define PMAP_SET 1
25#define PMAP_UNSET 2
26#define PMAP_GETPORT 3
27
28struct portmap_args {
29 u32 pm_prog;
30 u32 pm_vers;
31 u32 pm_prot;
32 unsigned short pm_port;
33 struct rpc_xprt * pm_xprt;
34};
35
36static struct rpc_procinfo pmap_procedures[];
37static struct rpc_clnt * pmap_create(char *, struct sockaddr_in *, int, int);
38static void pmap_getport_done(struct rpc_task *, void *);
39static struct rpc_program pmap_program;
40
41static void pmap_getport_prepare(struct rpc_task *task, void *calldata)
42{
43 struct portmap_args *map = calldata;
44 struct rpc_message msg = {
45 .rpc_proc = &pmap_procedures[PMAP_GETPORT],
46 .rpc_argp = map,
47 .rpc_resp = &map->pm_port,
48 };
49
50 rpc_call_setup(task, &msg, 0);
51}
52
53static inline struct portmap_args *pmap_map_alloc(void)
54{
55 return kmalloc(sizeof(struct portmap_args), GFP_NOFS);
56}
57
58static inline void pmap_map_free(struct portmap_args *map)
59{
60 kfree(map);
61}
62
63static void pmap_map_release(void *data)
64{
65 struct portmap_args *map = data;
66
67 xprt_put(map->pm_xprt);
68 pmap_map_free(map);
69}
70
71static const struct rpc_call_ops pmap_getport_ops = {
72 .rpc_call_prepare = pmap_getport_prepare,
73 .rpc_call_done = pmap_getport_done,
74 .rpc_release = pmap_map_release,
75};
76
77static inline void pmap_wake_portmap_waiters(struct rpc_xprt *xprt, int status)
78{
79 xprt_clear_binding(xprt);
80 rpc_wake_up_status(&xprt->binding, status);
81}
82
83/**
84 * rpc_getport - obtain the port for a given RPC service on a given host
85 * @task: task that is waiting for portmapper request
86 *
87 * This one can be called for an ongoing RPC request, and can be used in
88 * an async (rpciod) context.
89 */
90void rpc_getport(struct rpc_task *task)
91{
92 struct rpc_clnt *clnt = task->tk_client;
93 struct rpc_xprt *xprt = task->tk_xprt;
94 struct sockaddr_in addr;
95 struct portmap_args *map;
96 struct rpc_clnt *pmap_clnt;
97 struct rpc_task *child;
98 int status;
99
100 dprintk("RPC: %5u rpc_getport(%s, %u, %u, %d)\n",
101 task->tk_pid, clnt->cl_server,
102 clnt->cl_prog, clnt->cl_vers, xprt->prot);
103
104 /* Autobind on cloned rpc clients is discouraged */
105 BUG_ON(clnt->cl_parent != clnt);
106
107 status = -EACCES; /* tell caller to check again */
108 if (xprt_test_and_set_binding(xprt))
109 goto bailout_nowake;
110
111 /* Put self on queue before sending rpcbind request, in case
112 * pmap_getport_done completes before we return from rpc_run_task */
113 rpc_sleep_on(&xprt->binding, task, NULL, NULL);
114
115 /* Someone else may have bound if we slept */
116 status = 0;
117 if (xprt_bound(xprt))
118 goto bailout_nofree;
119
120 status = -ENOMEM;
121 map = pmap_map_alloc();
122 if (!map)
123 goto bailout_nofree;
124 map->pm_prog = clnt->cl_prog;
125 map->pm_vers = clnt->cl_vers;
126 map->pm_prot = xprt->prot;
127 map->pm_port = 0;
128 map->pm_xprt = xprt_get(xprt);
129
130 rpc_peeraddr(clnt, (struct sockaddr *) &addr, sizeof(addr));
131 pmap_clnt = pmap_create(clnt->cl_server, &addr, map->pm_prot, 0);
132 status = PTR_ERR(pmap_clnt);
133 if (IS_ERR(pmap_clnt))
134 goto bailout;
135
136 status = -EIO;
137 child = rpc_run_task(pmap_clnt, RPC_TASK_ASYNC, &pmap_getport_ops, map);
138 if (IS_ERR(child))
139 goto bailout_nofree;
140 rpc_put_task(child);
141
142 task->tk_xprt->stat.bind_count++;
143 return;
144
145bailout:
146 pmap_map_free(map);
147 xprt_put(xprt);
148bailout_nofree:
149 pmap_wake_portmap_waiters(xprt, status);
150bailout_nowake:
151 task->tk_status = status;
152}
153
154#ifdef CONFIG_ROOT_NFS
155/**
156 * rpc_getport_external - obtain the port for a given RPC service on a given host
157 * @sin: address of remote peer
158 * @prog: RPC program number to bind
159 * @vers: RPC version number to bind
160 * @prot: transport protocol to use to make this request
161 *
162 * This one is called from outside the RPC client in a synchronous task context.
163 */
164int rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
165{
166 struct portmap_args map = {
167 .pm_prog = prog,
168 .pm_vers = vers,
169 .pm_prot = prot,
170 .pm_port = 0
171 };
172 struct rpc_message msg = {
173 .rpc_proc = &pmap_procedures[PMAP_GETPORT],
174 .rpc_argp = &map,
175 .rpc_resp = &map.pm_port,
176 };
177 struct rpc_clnt *pmap_clnt;
178 char hostname[32];
179 int status;
180
181 dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %u, %u, %d)\n",
182 NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
183
184 sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
185 pmap_clnt = pmap_create(hostname, sin, prot, 0);
186 if (IS_ERR(pmap_clnt))
187 return PTR_ERR(pmap_clnt);
188
189 /* Setup the call info struct */
190 status = rpc_call_sync(pmap_clnt, &msg, 0);
191
192 if (status >= 0) {
193 if (map.pm_port != 0)
194 return map.pm_port;
195 status = -EACCES;
196 }
197 return status;
198}
199#endif
200
201/*
202 * Portmapper child task invokes this callback via tk_exit.
203 */
204static void pmap_getport_done(struct rpc_task *child, void *data)
205{
206 struct portmap_args *map = data;
207 struct rpc_xprt *xprt = map->pm_xprt;
208 int status = child->tk_status;
209
210 if (status < 0) {
211 /* Portmapper not available */
212 xprt->ops->set_port(xprt, 0);
213 } else if (map->pm_port == 0) {
214 /* Requested RPC service wasn't registered */
215 xprt->ops->set_port(xprt, 0);
216 status = -EACCES;
217 } else {
218 /* Succeeded */
219 xprt->ops->set_port(xprt, map->pm_port);
220 xprt_set_bound(xprt);
221 status = 0;
222 }
223
224 dprintk("RPC: %5u pmap_getport_done(status %d, port %u)\n",
225 child->tk_pid, status, map->pm_port);
226
227 pmap_wake_portmap_waiters(xprt, status);
228}
229
230/**
231 * rpc_register - set or unset a port registration with the local portmapper
232 * @prog: RPC program number to bind
233 * @vers: RPC version number to bind
234 * @prot: transport protocol to use to make this request
235 * @port: port value to register
236 * @okay: result code
237 *
238 * port == 0 means unregister, port != 0 means register.
239 */
240int rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
241{
242 struct sockaddr_in sin = {
243 .sin_family = AF_INET,
244 .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
245 };
246 struct portmap_args map = {
247 .pm_prog = prog,
248 .pm_vers = vers,
249 .pm_prot = prot,
250 .pm_port = port,
251 };
252 struct rpc_message msg = {
253 .rpc_proc = &pmap_procedures[port ? PMAP_SET : PMAP_UNSET],
254 .rpc_argp = &map,
255 .rpc_resp = okay,
256 };
257 struct rpc_clnt *pmap_clnt;
258 int error = 0;
259
260 dprintk("RPC: registering (%u, %u, %d, %u) with portmapper.\n",
261 prog, vers, prot, port);
262
263 pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP, 1);
264 if (IS_ERR(pmap_clnt)) {
265 error = PTR_ERR(pmap_clnt);
266 dprintk("RPC: couldn't create pmap client. Error = %d\n",
267 error);
268 return error;
269 }
270
271 error = rpc_call_sync(pmap_clnt, &msg, 0);
272
273 if (error < 0) {
274 printk(KERN_WARNING
275 "RPC: failed to contact portmap (errno %d).\n",
276 error);
277 }
278 dprintk("RPC: registration status %d/%d\n", error, *okay);
279
280 /* Client deleted automatically because cl_oneshot == 1 */
281 return error;
282}
283
284static struct rpc_clnt *pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto, int privileged)
285{
286 struct rpc_create_args args = {
287 .protocol = proto,
288 .address = (struct sockaddr *)srvaddr,
289 .addrsize = sizeof(*srvaddr),
290 .servername = hostname,
291 .program = &pmap_program,
292 .version = RPC_PMAP_VERSION,
293 .authflavor = RPC_AUTH_UNIX,
294 .flags = (RPC_CLNT_CREATE_ONESHOT |
295 RPC_CLNT_CREATE_NOPING),
296 };
297
298 srvaddr->sin_port = htons(RPC_PMAP_PORT);
299 if (!privileged)
300 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
301 return rpc_create(&args);
302}
303
304/*
305 * XDR encode/decode functions for PMAP
306 */
307static int xdr_encode_mapping(struct rpc_rqst *req, __be32 *p, struct portmap_args *map)
308{
309 dprintk("RPC: xdr_encode_mapping(%u, %u, %u, %u)\n",
310 map->pm_prog, map->pm_vers,
311 map->pm_prot, map->pm_port);
312 *p++ = htonl(map->pm_prog);
313 *p++ = htonl(map->pm_vers);
314 *p++ = htonl(map->pm_prot);
315 *p++ = htonl(map->pm_port);
316
317 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
318 return 0;
319}
320
321static int xdr_decode_port(struct rpc_rqst *req, __be32 *p, unsigned short *portp)
322{
323 *portp = (unsigned short) ntohl(*p++);
324 return 0;
325}
326
327static int xdr_decode_bool(struct rpc_rqst *req, __be32 *p, unsigned int *boolp)
328{
329 *boolp = (unsigned int) ntohl(*p++);
330 return 0;
331}
332
333static struct rpc_procinfo pmap_procedures[] = {
334[PMAP_SET] = {
335 .p_proc = PMAP_SET,
336 .p_encode = (kxdrproc_t) xdr_encode_mapping,
337 .p_decode = (kxdrproc_t) xdr_decode_bool,
338 .p_bufsiz = 4,
339 .p_count = 1,
340 .p_statidx = PMAP_SET,
341 .p_name = "SET",
342 },
343[PMAP_UNSET] = {
344 .p_proc = PMAP_UNSET,
345 .p_encode = (kxdrproc_t) xdr_encode_mapping,
346 .p_decode = (kxdrproc_t) xdr_decode_bool,
347 .p_bufsiz = 4,
348 .p_count = 1,
349 .p_statidx = PMAP_UNSET,
350 .p_name = "UNSET",
351 },
352[PMAP_GETPORT] = {
353 .p_proc = PMAP_GETPORT,
354 .p_encode = (kxdrproc_t) xdr_encode_mapping,
355 .p_decode = (kxdrproc_t) xdr_decode_port,
356 .p_bufsiz = 4,
357 .p_count = 1,
358 .p_statidx = PMAP_GETPORT,
359 .p_name = "GETPORT",
360 },
361};
362
363static struct rpc_version pmap_version2 = {
364 .number = 2,
365 .nrprocs = 4,
366 .procs = pmap_procedures
367};
368
369static struct rpc_version * pmap_version[] = {
370 NULL,
371 NULL,
372 &pmap_version2
373};
374
375static struct rpc_stat pmap_stats;
376
377static struct rpc_program pmap_program = {
378 .name = "portmap",
379 .number = RPC_PMAP_PROGRAM,
380 .nrvers = ARRAY_SIZE(pmap_version),
381 .version = pmap_version,
382 .stats = &pmap_stats,
383};
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-21 20:13:53 -0500