1 /* $OpenBSD: mount_nfs.c,v 1.44 2005/06/29 20:50:37 jaredy 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 #ifndef lint
37 static char copyright[] =
38 "@(#) Copyright (c) 1992, 1993, 1994\n\
39 The Regents of the University of California. All rights reserved.\n";
40 #endif /* not lint */
41
42 #ifndef lint
43 #if 0
44 static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
45 #else
46 static char rcsid[] = "$NetBSD: mount_nfs.c,v 1.12.4.1 1996/05/25 22:48:05 fvdl Exp $";
47 #endif
48 #endif /* not lint */
49
50 #include <sys/param.h>
51 #include <sys/mount.h>
52 #include <sys/socket.h>
53 #include <sys/socketvar.h>
54 #include <sys/stat.h>
55 #include <syslog.h>
56
57 #include <rpc/rpc.h>
58 #include <rpc/pmap_clnt.h>
59 #include <rpc/pmap_prot.h>
60
61 #include <nfs/rpcv2.h>
62 #include <nfs/nfsproto.h>
63 #define _KERNEL
64 #include <nfs/nfs.h>
65 #undef _KERNEL
66
67 #include <arpa/inet.h>
68
69 #include <ctype.h>
70 #include <err.h>
71 #include <errno.h>
72 #include <fcntl.h>
73 #include <netdb.h>
74 #include <signal.h>
75 #include <stdio.h>
76 #include <stdlib.h>
77 #include <string.h>
78 #include <unistd.h>
79
80 #include "mntopts.h"
81
82 #define ALTF_BG 0x1
83 #define ALTF_NOCONN 0x2
84 #define ALTF_DUMBTIMR 0x4
85 #define ALTF_INTR 0x8
86 #define ALTF_NFSV3 0x20
87 #define ALTF_RDIRPLUS 0x40
88 #define ALTF_MNTUDP 0x80
89 #define ALTF_RESVPORT 0x100
90 #define ALTF_SEQPACKET 0x200
91 #define ALTF_SOFT 0x800
92 #define ALTF_TCP 0x1000
93 #define ALTF_PORT 0x2000
94 #define ALTF_NFSV2 0x4000
95 #define ALTF_NOAC 0x8000
96 #define ALTF_ACREGMIN 0x10000
97 #define ALTF_ACREGMAX 0x20000
98 #define ALTF_ACDIRMIN 0x40000
99 #define ALTF_ACDIRMAX 0x80000
100
101 const struct mntopt mopts[] = {
102 MOPT_STDOPTS,
103 MOPT_FORCE,
104 MOPT_UPDATE,
105 { "bg", ALTF_BG, 0 },
106 { "conn", ALTF_NOCONN, MFLAG_INVERSE },
107 { "dumbtimer", ALTF_DUMBTIMR, 0 },
108 { "intr", ALTF_INTR, 0 },
109 { "nfsv3", ALTF_NFSV3, 0 },
110 { "rdirplus", ALTF_RDIRPLUS, 0 },
111 { "mntudp", ALTF_MNTUDP, 0 },
112 { "resvport", ALTF_RESVPORT, 0 },
113 { "soft", ALTF_SOFT, 0 },
114 { "tcp", ALTF_TCP, 0 },
115 { "port", ALTF_PORT, MFLAG_INTVAL },
116 { "nfsv2", ALTF_NFSV2, 0 },
117 { "ac", ALTF_NOAC, MFLAG_INVERSE },
118 { "acregmin", ALTF_ACREGMIN, MFLAG_INTVAL },
119 { "acregmax", ALTF_ACREGMAX, MFLAG_INTVAL },
120 { "acdirmin", ALTF_ACDIRMIN, MFLAG_INTVAL },
121 { "acdirmax", ALTF_ACDIRMAX, MFLAG_INTVAL },
122 { NULL }
123 };
124
125 struct nfs_args nfsdefargs = {
126 NFS_ARGSVERSION,
127 NULL,
128 sizeof (struct sockaddr_in),
129 SOCK_DGRAM,
130 0,
131 NULL,
132 0,
133 NFSMNT_NFSV3,
134 NFS_WSIZE,
135 NFS_RSIZE,
136 NFS_READDIRSIZE,
137 10,
138 NFS_RETRANS,
139 NFS_MAXGRPS,
140 NFS_DEFRAHEAD,
141 0,
142 0,
143 NULL,
144 0,
145 0,
146 0,
147 0
148 };
149
150 struct nfhret {
151 u_long stat;
152 long vers;
153 long auth;
154 long fhsize;
155 u_char nfh[NFSX_V3FHMAX];
156 };
157 #define DEF_RETRY 10000
158 #define BGRND 1
159 #define ISBGRND 2
160 int retrycnt;
161 int opflags = 0;
162 int nfsproto = IPPROTO_UDP;
163 int mnttcp_ok = 1;
164 u_short port_no = 0;
165 int force2 = 0;
166 int force3 = 0;
167
168 int getnfsargs(char *, struct nfs_args *);
169 void set_rpc_maxgrouplist(int);
170 __dead void usage(void);
171 int xdr_dir(XDR *, char *);
172 int xdr_fh(XDR *, struct nfhret *);
173
174 int
main(int argc,char * argv[])175 main(int argc, char *argv[])
176 {
177 int c;
178 struct nfs_args *nfsargsp;
179 struct nfs_args nfsargs;
180 int mntflags, num;
181 char name[MAXPATHLEN], *options = NULL, *p, *spec;
182 union mntval value;
183
184 retrycnt = DEF_RETRY;
185
186 mntflags = 0;
187 nfsargs = nfsdefargs;
188 nfsargsp = &nfsargs;
189 while ((c = getopt(argc, argv,
190 "23a:bcdD:g:I:iL:lo:PR:r:sTt:w:x:U")) != -1)
191 switch (c) {
192 case '3':
193 if (force2)
194 errx(1, "-2 and -3 are mutually exclusive");
195 force3 = 1;
196 break;
197 case '2':
198 if (force3)
199 errx(1, "-2 and -3 are mutually exclusive");
200 force2 = 1;
201 nfsargsp->flags &= ~NFSMNT_NFSV3;
202 break;
203 case 'a':
204 num = strtol(optarg, &p, 10);
205 if (*p || num < 0)
206 errx(1, "illegal -a value -- %s", optarg);
207 nfsargsp->readahead = num;
208 nfsargsp->flags |= NFSMNT_READAHEAD;
209 break;
210 case 'b':
211 opflags |= BGRND;
212 break;
213 case 'c':
214 nfsargsp->flags |= NFSMNT_NOCONN;
215 break;
216 case 'D':
217 /* backward compatibility */
218 break;
219 case 'd':
220 nfsargsp->flags |= NFSMNT_DUMBTIMR;
221 break;
222 #if 0 /* XXXX */
223 case 'g':
224 num = strtol(optarg, &p, 10);
225 if (*p || num <= 0)
226 errx(1, "illegal -g value -- %s", optarg);
227 set_rpc_maxgrouplist(num);
228 nfsargsp->maxgrouplist = num;
229 nfsargsp->flags |= NFSMNT_MAXGRPS;
230 break;
231 #endif
232 case 'I':
233 num = strtol(optarg, &p, 10);
234 if (*p || num <= 0)
235 errx(1, "illegal -I value -- %s", optarg);
236 nfsargsp->readdirsize = num;
237 nfsargsp->flags |= NFSMNT_READDIRSIZE;
238 break;
239 case 'i':
240 nfsargsp->flags |= NFSMNT_INT;
241 break;
242 case 'L':
243 /* backward compatibility */
244 break;
245 case 'l':
246 nfsargsp->flags |= NFSMNT_RDIRPLUS;
247 break;
248 case 'o':
249 options = optarg;
250 while (options != NULL) {
251 switch (getmntopt(&options, &value, mopts,
252 &mntflags)) {
253 case ALTF_BG:
254 opflags |= BGRND;
255 break;
256 case ALTF_NOCONN:
257 nfsargsp->flags |= NFSMNT_NOCONN;
258 break;
259 case ALTF_DUMBTIMR:
260 nfsargsp->flags |= NFSMNT_DUMBTIMR;
261 break;
262 case ALTF_INTR:
263 nfsargsp->flags |= NFSMNT_INT;
264 break;
265 case ALTF_NFSV3:
266 if (force2)
267 errx(1,
268 "conflicting version options");
269 force3 = 1;
270 break;
271 case ALTF_NFSV2:
272 if (force3)
273 errx(1,
274 "conflicting version options");
275 force2 = 1;
276 nfsargsp->flags &= ~NFSMNT_NFSV3;
277 break;
278 case ALTF_RDIRPLUS:
279 nfsargsp->flags |= NFSMNT_RDIRPLUS;
280 break;
281 case ALTF_MNTUDP:
282 mnttcp_ok = 0;
283 break;
284 case ALTF_RESVPORT:
285 nfsargsp->flags |= NFSMNT_RESVPORT;
286 break;
287 case ALTF_SOFT:
288 nfsargsp->flags |= NFSMNT_SOFT;
289 break;
290 case ALTF_TCP:
291 nfsargsp->sotype = SOCK_STREAM;
292 nfsproto = IPPROTO_TCP;
293 break;
294 case ALTF_PORT:
295 port_no = value.ival;
296 break;
297 case ALTF_NOAC:
298 nfsargsp->flags |= (NFSMNT_ACREGMIN |
299 NFSMNT_ACREGMAX | NFSMNT_ACDIRMIN |
300 NFSMNT_ACDIRMAX);
301 nfsargsp->acregmin = 0;
302 nfsargsp->acregmax = 0;
303 nfsargsp->acdirmin = 0;
304 nfsargsp->acdirmax = 0;
305 break;
306 case ALTF_ACREGMIN:
307 nfsargsp->flags |= NFSMNT_ACREGMIN;
308 nfsargsp->acregmin = value.ival;
309 break;
310 case ALTF_ACREGMAX:
311 nfsargsp->flags |= NFSMNT_ACREGMAX;
312 nfsargsp->acregmax = value.ival;
313 break;
314 case ALTF_ACDIRMIN:
315 nfsargsp->flags |= NFSMNT_ACDIRMIN;
316 nfsargsp->acdirmin = value.ival;
317 break;
318 case ALTF_ACDIRMAX:
319 nfsargsp->flags |= NFSMNT_ACDIRMAX;
320 nfsargsp->acdirmax = value.ival;
321 break;
322 }
323 }
324 break;
325 case 'P':
326 /* backward compatibility */
327 break;
328 case 'R':
329 num = strtol(optarg, &p, 10);
330 if (*p || num <= 0)
331 errx(1, "illegal -R value -- %s", optarg);
332 retrycnt = num;
333 break;
334 case 'r':
335 num = strtol(optarg, &p, 10);
336 if (*p || num <= 0)
337 errx(1, "illegal -r value -- %s", optarg);
338 nfsargsp->rsize = num;
339 nfsargsp->flags |= NFSMNT_RSIZE;
340 break;
341 case 's':
342 nfsargsp->flags |= NFSMNT_SOFT;
343 break;
344 case 'T':
345 nfsargsp->sotype = SOCK_STREAM;
346 nfsproto = IPPROTO_TCP;
347 break;
348 case 't':
349 num = strtol(optarg, &p, 10);
350 if (*p || num <= 0)
351 errx(1, "illegal -t value -- %s", optarg);
352 nfsargsp->timeo = num;
353 nfsargsp->flags |= NFSMNT_TIMEO;
354 break;
355 case 'w':
356 num = strtol(optarg, &p, 10);
357 if (*p || num <= 0)
358 errx(1, "illegal -w value -- %s", optarg);
359 nfsargsp->wsize = num;
360 nfsargsp->flags |= NFSMNT_WSIZE;
361 break;
362 case 'x':
363 num = strtol(optarg, &p, 10);
364 if (*p || num <= 0)
365 errx(1, "illegal -x value -- %s", optarg);
366 nfsargsp->retrans = num;
367 nfsargsp->flags |= NFSMNT_RETRANS;
368 break;
369 case 'U':
370 mnttcp_ok = 0;
371 break;
372 default:
373 usage();
374 /* NOTREACHED */
375 }
376 argc -= optind;
377 argv += optind;
378
379 if (argc != 2)
380 usage();
381
382 spec = *argv++;
383 if (realpath(*argv, name) == NULL)
384 err(1, "realpath %s", *argv);
385
386 if (!getnfsargs(spec, nfsargsp))
387 exit(1);
388 if (mount(MOUNT_NFS, name, mntflags, nfsargsp)) {
389 if (errno == EOPNOTSUPP)
390 errx(1, "%s: Filesystem not supported by kernel", name);
391 else
392 err(1, "%s", name);
393 }
394 exit(0);
395 }
396
397 int
getnfsargs(char * spec,struct nfs_args * nfsargsp)398 getnfsargs(char *spec, struct nfs_args *nfsargsp)
399 {
400 CLIENT *clp;
401 struct hostent *hp;
402 static struct sockaddr_in saddr;
403 struct timeval pertry, try;
404 enum clnt_stat clnt_stat;
405 int so = RPC_ANYSOCK, i, nfsvers, mntvers, orgcnt;
406 char *hostp, *delimp;
407 u_short tport;
408 static struct nfhret nfhret;
409 static char nam[MNAMELEN + 1];
410
411 if (strlcpy(nam, spec, sizeof(nam)) >= sizeof(nam)) {
412 errx(1, "hostname too long");
413 }
414
415 if ((delimp = strchr(spec, '@')) != NULL) {
416 hostp = delimp + 1;
417 } else if ((delimp = strchr(spec, ':')) != NULL) {
418 hostp = spec;
419 spec = delimp + 1;
420 } else {
421 warnx("no <host>:<dirpath> or <dirpath>@<host> spec");
422 return (0);
423 }
424 *delimp = '\0';
425
426 /*
427 * Handle an internet host address
428 */
429 if (inet_aton(hostp, &saddr.sin_addr) == 0) {
430 hp = gethostbyname(hostp);
431 if (hp == NULL) {
432 warnx("can't resolve address for host %s", hostp);
433 return (0);
434 }
435 memcpy(&saddr.sin_addr, hp->h_addr, hp->h_length);
436 }
437
438 if (force2) {
439 nfsvers = NFS_VER2;
440 mntvers = RPCMNT_VER1;
441 } else {
442 nfsvers = NFS_VER3;
443 mntvers = RPCMNT_VER3;
444 }
445 orgcnt = retrycnt;
446 tryagain:
447 nfhret.stat = EACCES; /* Mark not yet successful */
448 while (retrycnt > 0) {
449 saddr.sin_family = AF_INET;
450 saddr.sin_port = htons(PMAPPORT);
451 if ((tport = port_no ? port_no : pmap_getport(&saddr,
452 RPCPROG_NFS, nfsvers, nfsargsp->sotype == SOCK_STREAM ?
453 IPPROTO_TCP : IPPROTO_UDP)) == 0) {
454 if ((opflags & ISBGRND) == 0)
455 clnt_pcreateerror("NFS Portmap");
456 } else {
457 saddr.sin_port = 0;
458 pertry.tv_sec = 10;
459 pertry.tv_usec = 0;
460 if (mnttcp_ok && nfsargsp->sotype == SOCK_STREAM)
461 clp = clnttcp_create(&saddr, RPCPROG_MNT, mntvers,
462 &so, 0, 0);
463 else
464 clp = clntudp_create(&saddr, RPCPROG_MNT, mntvers,
465 pertry, &so);
466 if (clp == NULL) {
467 if ((opflags & ISBGRND) == 0)
468 clnt_pcreateerror("Cannot MNT PRC");
469 } else {
470 clp->cl_auth = authunix_create_default();
471 try.tv_sec = 10;
472 try.tv_usec = 0;
473 nfhret.auth = RPCAUTH_UNIX;
474 nfhret.vers = mntvers;
475 clnt_stat = clnt_call(clp, RPCMNT_MOUNT,
476 xdr_dir, spec, xdr_fh, &nfhret, try);
477 if (clnt_stat != RPC_SUCCESS) {
478 if (clnt_stat == RPC_PROGVERSMISMATCH) {
479 if (nfsvers == NFS_VER3 &&
480 !force3) {
481 retrycnt = orgcnt;
482 nfsvers = NFS_VER2;
483 mntvers = RPCMNT_VER1;
484 nfsargsp->flags &=
485 ~NFSMNT_NFSV3;
486 goto tryagain;
487 } else {
488 warnx("%s",
489 clnt_sperror(clp,
490 "MNT RPC"));
491 }
492 }
493 if ((opflags & ISBGRND) == 0)
494 warnx("%s", clnt_sperror(clp,
495 "bad MNT RPC"));
496 } else {
497 auth_destroy(clp->cl_auth);
498 clnt_destroy(clp);
499 retrycnt = 0;
500 }
501 }
502 }
503 if (--retrycnt > 0) {
504 if (opflags & BGRND) {
505 opflags &= ~BGRND;
506 if ((i = fork())) {
507 if (i == -1)
508 err(1, "fork");
509 exit(0);
510 }
511 (void) setsid();
512 (void) close(STDIN_FILENO);
513 (void) close(STDOUT_FILENO);
514 (void) close(STDERR_FILENO);
515 (void) chdir("/");
516 opflags |= ISBGRND;
517 }
518 sleep(60);
519 }
520 }
521 if (nfhret.stat) {
522 if (opflags & ISBGRND)
523 exit(1);
524 errno = nfhret.stat;
525 warnx("can't access %s: %s", spec, strerror(nfhret.stat));
526 return (0);
527 }
528 saddr.sin_port = htons(tport);
529 nfsargsp->addr = (struct sockaddr *) &saddr;
530 nfsargsp->addrlen = sizeof (saddr);
531 nfsargsp->fh = nfhret.nfh;
532 nfsargsp->fhsize = nfhret.fhsize;
533 nfsargsp->hostname = nam;
534 return (1);
535 }
536
537 /*
538 * xdr routines for mount rpc's
539 */
540 int
xdr_dir(XDR * xdrsp,char * dirp)541 xdr_dir(XDR *xdrsp, char *dirp)
542 {
543 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
544 }
545
546 int
xdr_fh(XDR * xdrsp,struct nfhret * np)547 xdr_fh(XDR *xdrsp, struct nfhret *np)
548 {
549 int i;
550 long auth, authcnt, authfnd = 0;
551
552 if (!xdr_u_long(xdrsp, &np->stat))
553 return (0);
554 if (np->stat)
555 return (1);
556 switch (np->vers) {
557 case 1:
558 np->fhsize = NFSX_V2FH;
559 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
560 case 3:
561 if (!xdr_long(xdrsp, &np->fhsize))
562 return (0);
563 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
564 return (0);
565 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
566 return (0);
567 if (!xdr_long(xdrsp, &authcnt))
568 return (0);
569 for (i = 0; i < authcnt; i++) {
570 if (!xdr_long(xdrsp, &auth))
571 return (0);
572 if (auth == np->auth)
573 authfnd++;
574 }
575 /*
576 * Some servers, such as DEC's OSF/1 return a nil authenticator
577 * list to indicate RPCAUTH_UNIX.
578 */
579 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
580 np->stat = EAUTH;
581 return (1);
582 };
583 return (0);
584 }
585
586 __dead void
usage(void)587 usage(void)
588 {
589 extern char *__progname;
590
591 (void)fprintf(stderr,
592 "usage: %s [-23bcdilsTU] [-a maxreadahead] [-g maxgroups]\n"
593 "\t[-I readdirsize] [-o options] [-R retrycnt] [-r readsize]\n"
594 "\t[-t timeout] [-w writesize] [-x retrans] rhost:path node\n",
595 __progname);
596 exit(1);
597 }
598