GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: sbin/mount_nfs/mount_nfs.c Lines: 0 262 0.0 %
Date: 2017-11-07 Branches: 0 156 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: mount_nfs.c,v 1.53 2016/05/27 19:45:04 deraadt Exp $	*/
2
/*	$NetBSD: mount_nfs.c,v 1.12.4.1 1996/05/25 22:48:05 fvdl Exp $	*/
3
4
/*
5
 * Copyright (c) 1992, 1993, 1994
6
 *	The Regents of the University of California.  All rights reserved.
7
 *
8
 * This code is derived from software contributed to Berkeley by
9
 * Rick Macklem at The University of Guelph.
10
 *
11
 * Redistribution and use in source and binary forms, with or without
12
 * modification, are permitted provided that the following conditions
13
 * are met:
14
 * 1. Redistributions of source code must retain the above copyright
15
 *    notice, this list of conditions and the following disclaimer.
16
 * 2. Redistributions in binary form must reproduce the above copyright
17
 *    notice, this list of conditions and the following disclaimer in the
18
 *    documentation and/or other materials provided with the distribution.
19
 * 3. Neither the name of the University nor the names of its contributors
20
 *    may be used to endorse or promote products derived from this software
21
 *    without specific prior written permission.
22
 *
23
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33
 * SUCH DAMAGE.
34
 */
35
36
#include <sys/types.h>
37
#include <sys/mount.h>
38
#include <sys/socket.h>
39
#include <sys/socketvar.h>
40
#include <sys/stat.h>
41
#include <syslog.h>
42
43
#include <rpc/rpc.h>
44
#include <rpc/pmap_clnt.h>
45
#include <rpc/pmap_prot.h>
46
47
#include <nfs/rpcv2.h>
48
#include <nfs/nfsproto.h>
49
#include <nfs/nfs.h>
50
51
#include <arpa/inet.h>
52
53
#include <ctype.h>
54
#include <err.h>
55
#include <errno.h>
56
#include <fcntl.h>
57
#include <netdb.h>
58
#include <signal.h>
59
#include <stdio.h>
60
#include <stdlib.h>
61
#include <string.h>
62
#include <unistd.h>
63
#include <limits.h>
64
65
#include "mntopts.h"
66
67
#define	ALTF_BG		0x1
68
#define ALTF_NOCONN	0x2
69
#define ALTF_DUMBTIMR	0x4
70
#define ALTF_INTR	0x8
71
#define ALTF_NFSV3	0x20
72
#define ALTF_RDIRPLUS	0x40
73
#define	ALTF_MNTUDP	0x80
74
#define ALTF_RESVPORT	0x100
75
#define ALTF_SEQPACKET	0x200
76
#define ALTF_SOFT	0x800
77
#define ALTF_TCP	0x1000
78
#define ALTF_PORT	0x2000
79
#define ALTF_NFSV2	0x4000
80
#define ALTF_NOAC       0x8000
81
#define ALTF_ACREGMIN	0x10000
82
#define ALTF_ACREGMAX	0x20000
83
#define ALTF_ACDIRMIN	0x40000
84
#define ALTF_ACDIRMAX	0x80000
85
86
const struct mntopt mopts[] = {
87
	MOPT_STDOPTS,
88
	MOPT_WXALLOWED,
89
	MOPT_FORCE,
90
	MOPT_UPDATE,
91
	MOPT_SYNC,
92
	{ "bg", ALTF_BG, 0 },
93
	{ "conn", ALTF_NOCONN, MFLAG_INVERSE },
94
	{ "dumbtimer", ALTF_DUMBTIMR, 0 },
95
	{ "intr", ALTF_INTR, 0 },
96
	{ "nfsv3", ALTF_NFSV3, 0 },
97
	{ "rdirplus", ALTF_RDIRPLUS, 0 },
98
	{ "mntudp", ALTF_MNTUDP, 0 },
99
	{ "resvport", ALTF_RESVPORT, 0 },
100
	{ "soft", ALTF_SOFT, 0 },
101
	{ "tcp", ALTF_TCP, 0 },
102
	{ "port", ALTF_PORT, MFLAG_INTVAL },
103
	{ "nfsv2", ALTF_NFSV2, 0 },
104
	{ "ac", ALTF_NOAC, MFLAG_INVERSE },
105
	{ "acregmin", ALTF_ACREGMIN, MFLAG_INTVAL },
106
	{ "acregmax", ALTF_ACREGMAX, MFLAG_INTVAL },
107
	{ "acdirmin", ALTF_ACDIRMIN, MFLAG_INTVAL },
108
	{ "acdirmax", ALTF_ACDIRMAX, MFLAG_INTVAL },
109
	{ NULL }
110
};
111
112
struct nfs_args nfsdefargs = {
113
	NFS_ARGSVERSION,
114
	NULL,
115
	sizeof (struct sockaddr_in),
116
	SOCK_DGRAM,
117
	0,
118
	NULL,
119
	0,
120
	NFSMNT_NFSV3,
121
	NFS_WSIZE,
122
	NFS_RSIZE,
123
	NFS_READDIRSIZE,
124
	10,
125
	NFS_RETRANS,
126
	NFS_MAXGRPS,
127
	NFS_DEFRAHEAD,
128
	0,
129
	0,
130
	NULL,
131
	0,
132
	0,
133
	0,
134
	0
135
};
136
137
struct nfhret {
138
	u_long		stat;
139
	long		vers;
140
	long		auth;
141
	long		fhsize;
142
	u_char		nfh[NFSX_V3FHMAX];
143
};
144
#define	DEF_RETRY	10000
145
#define	BGRND	1
146
#define	ISBGRND	2
147
int retrycnt;
148
int opflags = 0;
149
int nfsproto = IPPROTO_UDP;
150
int mnttcp_ok = 1;
151
u_short port_no = 0;
152
int force2 = 0;
153
int force3 = 0;
154
155
int	getnfsargs(char *, struct nfs_args *);
156
void	set_rpc_maxgrouplist(int);
157
__dead	void usage(void);
158
int	xdr_dir(XDR *, char *);
159
int	xdr_fh(XDR *, struct nfhret *);
160
161
int
162
main(int argc, char *argv[])
163
{
164
	int c;
165
	struct nfs_args *nfsargsp;
166
	struct nfs_args nfsargs;
167
	int mntflags, num;
168
	char name[PATH_MAX], *options = NULL, *spec;
169
	const char *p;
170
	union mntval value;
171
172
	retrycnt = DEF_RETRY;
173
174
	mntflags = 0;
175
	nfsargs = nfsdefargs;
176
	nfsargsp = &nfsargs;
177
	while ((c = getopt(argc, argv,
178
	    "23a:bcdD:g:I:iL:lo:PR:r:sTt:w:x:U")) != -1)
179
		switch (c) {
180
		case '3':
181
			if (force2)
182
				errx(1, "-2 and -3 are mutually exclusive");
183
			force3 = 1;
184
			break;
185
		case '2':
186
			if (force3)
187
				errx(1, "-2 and -3 are mutually exclusive");
188
			force2 = 1;
189
			nfsargsp->flags &= ~NFSMNT_NFSV3;
190
			break;
191
		case 'a':
192
			num = (int) strtonum(optarg, 0, 4, &p);
193
			if (p)
194
				errx(1, "illegal -a value %s: %s", optarg, p);
195
			nfsargsp->readahead = num;
196
			nfsargsp->flags |= NFSMNT_READAHEAD;
197
			break;
198
		case 'b':
199
			opflags |= BGRND;
200
			break;
201
		case 'c':
202
			nfsargsp->flags |= NFSMNT_NOCONN;
203
			break;
204
		case 'D':
205
			/* backward compatibility */
206
			break;
207
		case 'd':
208
			nfsargsp->flags |= NFSMNT_DUMBTIMR;
209
			break;
210
		case 'g':
211
			num = (int) strtonum(optarg, 1, NGROUPS_MAX, &p);
212
			if (p)
213
				errx(1, "illegal -g value %s: %s", optarg, p);
214
			set_rpc_maxgrouplist(num);
215
			nfsargsp->maxgrouplist = num;
216
			nfsargsp->flags |= NFSMNT_MAXGRPS;
217
			break;
218
		case 'I':
219
			num = (int) strtonum(optarg, 1, INT_MAX, &p);
220
			if (p)
221
				errx(1, "illegal -I value %s: %s", optarg, p);
222
			nfsargsp->readdirsize = num;
223
			nfsargsp->flags |= NFSMNT_READDIRSIZE;
224
			break;
225
		case 'i':
226
			nfsargsp->flags |= NFSMNT_INT;
227
			break;
228
		case 'L':
229
			/* backward compatibility */
230
			break;
231
		case 'l':
232
			nfsargsp->flags |= NFSMNT_RDIRPLUS;
233
			break;
234
		case 'o':
235
			options = optarg;
236
			while (options != NULL) {
237
				switch (getmntopt(&options, &value, mopts,
238
				    &mntflags)) {
239
				case ALTF_BG:
240
					opflags |= BGRND;
241
					break;
242
				case ALTF_NOCONN:
243
					nfsargsp->flags |= NFSMNT_NOCONN;
244
					break;
245
				case ALTF_DUMBTIMR:
246
					nfsargsp->flags |= NFSMNT_DUMBTIMR;
247
					break;
248
				case ALTF_INTR:
249
					nfsargsp->flags |= NFSMNT_INT;
250
					break;
251
				case ALTF_NFSV3:
252
					if (force2)
253
						errx(1,
254
						    "conflicting version options");
255
					force3 = 1;
256
					break;
257
				case ALTF_NFSV2:
258
					if (force3)
259
						errx(1,
260
						    "conflicting version options");
261
					force2 = 1;
262
					nfsargsp->flags &= ~NFSMNT_NFSV3;
263
					break;
264
				case ALTF_RDIRPLUS:
265
					nfsargsp->flags |= NFSMNT_RDIRPLUS;
266
					break;
267
				case ALTF_MNTUDP:
268
					mnttcp_ok = 0;
269
					break;
270
				case ALTF_RESVPORT:
271
					nfsargsp->flags |= NFSMNT_RESVPORT;
272
					break;
273
				case ALTF_SOFT:
274
					nfsargsp->flags |= NFSMNT_SOFT;
275
					break;
276
				case ALTF_TCP:
277
					nfsargsp->sotype = SOCK_STREAM;
278
					nfsproto = IPPROTO_TCP;
279
					break;
280
				case ALTF_PORT:
281
					port_no = value.ival;
282
					break;
283
				case ALTF_NOAC:
284
					nfsargsp->flags |= (NFSMNT_ACREGMIN |
285
					    NFSMNT_ACREGMAX | NFSMNT_ACDIRMIN |
286
					    NFSMNT_ACDIRMAX);
287
					nfsargsp->acregmin = 0;
288
					nfsargsp->acregmax = 0;
289
					nfsargsp->acdirmin = 0;
290
					nfsargsp->acdirmax = 0;
291
					break;
292
				case ALTF_ACREGMIN:
293
					nfsargsp->flags |= NFSMNT_ACREGMIN;
294
					nfsargsp->acregmin = value.ival;
295
					break;
296
				case ALTF_ACREGMAX:
297
					nfsargsp->flags |= NFSMNT_ACREGMAX;
298
					nfsargsp->acregmax = value.ival;
299
					break;
300
				case ALTF_ACDIRMIN:
301
					nfsargsp->flags |= NFSMNT_ACDIRMIN;
302
					nfsargsp->acdirmin = value.ival;
303
					break;
304
				case ALTF_ACDIRMAX:
305
					nfsargsp->flags |= NFSMNT_ACDIRMAX;
306
					nfsargsp->acdirmax = value.ival;
307
					break;
308
				}
309
			}
310
			break;
311
		case 'P':
312
			/* backward compatibility */
313
			break;
314
		case 'R':
315
			num = (int) strtonum(optarg, 1, INT_MAX, &p);
316
			if (p)
317
				errx(1, "illegal -R value %s: %s", optarg, p);
318
			retrycnt = num;
319
			break;
320
		case 'r':
321
			num = (int) strtonum(optarg, 1, INT_MAX, &p);
322
			if (p)
323
				errx(1, "illegal -r value %s: %s", optarg, p);
324
			nfsargsp->rsize = num;
325
			nfsargsp->flags |= NFSMNT_RSIZE;
326
			break;
327
		case 's':
328
			nfsargsp->flags |= NFSMNT_SOFT;
329
			break;
330
		case 'T':
331
			nfsargsp->sotype = SOCK_STREAM;
332
			nfsproto = IPPROTO_TCP;
333
			break;
334
		case 't':
335
			num = (int) strtonum(optarg, 1, INT_MAX, &p);
336
			if (p)
337
				errx(1, "illegal -t value %s: %s", optarg, p);
338
			nfsargsp->timeo = num;
339
			nfsargsp->flags |= NFSMNT_TIMEO;
340
			break;
341
		case 'w':
342
			num = (int) strtonum(optarg, 1, INT_MAX, &p);
343
			if (p)
344
				errx(1, "illegal -w value %s: %s", optarg, p);
345
			nfsargsp->wsize = num;
346
			nfsargsp->flags |= NFSMNT_WSIZE;
347
			break;
348
		case 'x':
349
			num = (int) strtonum(optarg, 1, INT_MAX, &p);
350
			if (p)
351
				errx(1, "illegal -x value %s: %s", optarg, p);
352
			nfsargsp->retrans = num;
353
			nfsargsp->flags |= NFSMNT_RETRANS;
354
			break;
355
		case 'U':
356
			mnttcp_ok = 0;
357
			break;
358
		default:
359
			usage();
360
			/* NOTREACHED */
361
		}
362
	argc -= optind;
363
	argv += optind;
364
365
	if (argc != 2)
366
		usage();
367
368
	spec = *argv++;
369
	if (realpath(*argv, name) == NULL)
370
		err(1, "realpath %s", *argv);
371
372
	if (!getnfsargs(spec, nfsargsp))
373
		exit(1);
374
	if (mount(MOUNT_NFS, name, mntflags, nfsargsp)) {
375
		if (errno == EOPNOTSUPP)
376
			errx(1, "%s: Filesystem not supported by kernel", name);
377
		else
378
			err(1, "%s", name);
379
	}
380
	exit(0);
381
}
382
383
int
384
getnfsargs(char *spec, struct nfs_args *nfsargsp)
385
{
386
	CLIENT *clp;
387
	struct hostent *hp;
388
	static struct sockaddr_in saddr;
389
	struct timeval pertry, try;
390
	enum clnt_stat clnt_stat;
391
	int so = RPC_ANYSOCK, i, nfsvers, mntvers, orgcnt;
392
	char *hostp, *delimp;
393
	u_short tport;
394
	static struct nfhret nfhret;
395
	static char nam[MNAMELEN + 1];
396
397
	if (strlcpy(nam, spec, sizeof(nam)) >= sizeof(nam)) {
398
		errx(1, "hostname too long");
399
	}
400
401
	if ((delimp = strchr(spec, '@')) != NULL) {
402
		hostp = delimp + 1;
403
	} else if ((delimp = strchr(spec, ':')) != NULL) {
404
		hostp = spec;
405
		spec = delimp + 1;
406
	} else {
407
		warnx("no <host>:<dirpath> or <dirpath>@<host> spec");
408
		return (0);
409
	}
410
	*delimp = '\0';
411
412
	/*
413
	 * Handle an internet host address
414
	 */
415
	if (inet_aton(hostp, &saddr.sin_addr) == 0) {
416
		hp = gethostbyname(hostp);
417
		if (hp == NULL) {
418
			warnx("can't resolve address for host %s", hostp);
419
			return (0);
420
		}
421
		memcpy(&saddr.sin_addr, hp->h_addr, hp->h_length);
422
	}
423
424
	if (force2) {
425
		nfsvers = NFS_VER2;
426
		mntvers = RPCMNT_VER1;
427
	} else {
428
		nfsvers = NFS_VER3;
429
		mntvers = RPCMNT_VER3;
430
	}
431
	orgcnt = retrycnt;
432
tryagain:
433
	nfhret.stat = EACCES;	/* Mark not yet successful */
434
	while (retrycnt > 0) {
435
		saddr.sin_family = AF_INET;
436
		saddr.sin_port = htons(PMAPPORT);
437
		if ((tport = port_no ? port_no : pmap_getport(&saddr,
438
		    RPCPROG_NFS, nfsvers, nfsargsp->sotype == SOCK_STREAM ?
439
		    IPPROTO_TCP : IPPROTO_UDP)) == 0) {
440
			if ((opflags & ISBGRND) == 0)
441
				clnt_pcreateerror("NFS Portmap");
442
		} else {
443
			saddr.sin_port = 0;
444
			pertry.tv_sec = 10;
445
			pertry.tv_usec = 0;
446
			if (mnttcp_ok && nfsargsp->sotype == SOCK_STREAM)
447
			    clp = clnttcp_create(&saddr, RPCPROG_MNT, mntvers,
448
				&so, 0, 0);
449
			else
450
			    clp = clntudp_create(&saddr, RPCPROG_MNT, mntvers,
451
				pertry, &so);
452
			if (clp == NULL) {
453
				if ((opflags & ISBGRND) == 0)
454
					clnt_pcreateerror("Cannot MNT RPC");
455
			} else {
456
				clp->cl_auth = authunix_create_default();
457
				try.tv_sec = 10;
458
				try.tv_usec = 0;
459
				nfhret.auth = RPCAUTH_UNIX;
460
				nfhret.vers = mntvers;
461
				clnt_stat = clnt_call(clp, RPCMNT_MOUNT,
462
				    xdr_dir, spec, xdr_fh, &nfhret, try);
463
				if (clnt_stat != RPC_SUCCESS) {
464
					if (clnt_stat == RPC_PROGVERSMISMATCH) {
465
						if (nfsvers == NFS_VER3 &&
466
						    !force3) {
467
							retrycnt = orgcnt;
468
							nfsvers = NFS_VER2;
469
							mntvers = RPCMNT_VER1;
470
							nfsargsp->flags &=
471
							    ~NFSMNT_NFSV3;
472
							goto tryagain;
473
						} else {
474
							warnx("%s",
475
							    clnt_sperror(clp,
476
								"MNT RPC"));
477
						}
478
					}
479
					if ((opflags & ISBGRND) == 0)
480
						warnx("%s", clnt_sperror(clp,
481
						    "bad MNT RPC"));
482
				} else {
483
					auth_destroy(clp->cl_auth);
484
					clnt_destroy(clp);
485
					retrycnt = 0;
486
				}
487
			}
488
		}
489
		if (--retrycnt > 0) {
490
			if (opflags & BGRND) {
491
				opflags &= ~BGRND;
492
				if ((i = fork())) {
493
					if (i == -1)
494
						err(1, "fork");
495
					exit(0);
496
				}
497
				(void) setsid();
498
				(void) close(STDIN_FILENO);
499
				(void) close(STDOUT_FILENO);
500
				(void) close(STDERR_FILENO);
501
				(void) chdir("/");
502
				opflags |= ISBGRND;
503
			}
504
			sleep(60);
505
		}
506
	}
507
	if (nfhret.stat) {
508
		if (opflags & ISBGRND)
509
			exit(1);
510
		warnc(nfhret.stat, "can't access %s", spec);
511
		return (0);
512
	}
513
	saddr.sin_port = htons(tport);
514
	nfsargsp->addr = (struct sockaddr *) &saddr;
515
	nfsargsp->addrlen = sizeof (saddr);
516
	nfsargsp->fh = nfhret.nfh;
517
	nfsargsp->fhsize = nfhret.fhsize;
518
	nfsargsp->hostname = nam;
519
	return (1);
520
}
521
522
/*
523
 * xdr routines for mount rpc's
524
 */
525
int
526
xdr_dir(XDR *xdrsp, char *dirp)
527
{
528
	return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
529
}
530
531
int
532
xdr_fh(XDR *xdrsp, struct nfhret *np)
533
{
534
	int i;
535
	long auth, authcnt, authfnd = 0;
536
537
	if (!xdr_u_long(xdrsp, &np->stat))
538
		return (0);
539
	if (np->stat)
540
		return (1);
541
	switch (np->vers) {
542
	case 1:
543
		np->fhsize = NFSX_V2FH;
544
		return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
545
	case 3:
546
		if (!xdr_long(xdrsp, &np->fhsize))
547
			return (0);
548
		if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
549
			return (0);
550
		if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
551
			return (0);
552
		if (!xdr_long(xdrsp, &authcnt))
553
			return (0);
554
		for (i = 0; i < authcnt; i++) {
555
			if (!xdr_long(xdrsp, &auth))
556
				return (0);
557
			if (auth == np->auth)
558
				authfnd++;
559
		}
560
		/*
561
		 * Some servers, such as DEC's OSF/1 return a nil authenticator
562
		 * list to indicate RPCAUTH_UNIX.
563
		 */
564
		if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
565
			np->stat = EAUTH;
566
		return (1);
567
	};
568
	return (0);
569
}
570
571
__dead void
572
usage(void)
573
{
574
	extern char *__progname;
575
576
	(void)fprintf(stderr,
577
	    "usage: %s [-23bcdilsTU] [-a maxreadahead] [-g maxgroups]\n"
578
	    "\t[-I readdirsize] [-o options] [-R retrycnt] [-r readsize]\n"
579
	    "\t[-t timeout] [-w writesize] [-x retrans] rhost:path node\n",
580
	    __progname);
581
	exit(1);
582
}