1/*	$NetBSD: mount_nfs.c,v 1.68 2009/11/30 17:17:55 pooka Exp $	*/
2
3/*
4 * Copyright (c) 1992, 1993, 1994
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Rick Macklem at The University of Guelph.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36#ifndef lint
37__COPYRIGHT("@(#) Copyright (c) 1992, 1993, 1994\
38 The Regents of the University of California.  All rights reserved.");
39#endif /* not lint */
40
41#ifndef lint
42#if 0
43static char sccsid[] = "@(#)mount_nfs.c	8.11 (Berkeley) 5/4/95";
44#else
45__RCSID("$NetBSD: mount_nfs.c,v 1.68 2009/11/30 17:17:55 pooka Exp $");
46#endif
47#endif /* not lint */
48
49#include <sys/param.h>
50#include <sys/mount.h>
51#include <sys/socket.h>
52#include <sys/stat.h>
53#include <syslog.h>
54
55#ifdef ISO
56#include <netiso/iso.h>
57#endif
58
59#include <nfs/rpcv2.h>
60#include <nfs/nfsproto.h>
61#include <nfs/nfs.h>
62#include <nfs/nfsmount.h>
63
64#include <arpa/inet.h>
65
66#include <err.h>
67#include <errno.h>
68#include <fcntl.h>
69#include <netdb.h>
70#include <signal.h>
71#include <stdio.h>
72#include <stdlib.h>
73#include <string.h>
74#include <unistd.h>
75#include <util.h>
76
77#include <mntopts.h>
78
79#include "mountprog.h"
80#include "mount_nfs.h"
81
82#define	ALTF_BG		0x00000001
83#define ALTF_CONN	0x00000002
84#define ALTF_DUMBTIMR	0x00000004
85#define ALTF_INTR	0x00000008
86#define ALTF_NFSV3	0x00000020
87#define ALTF_RDIRPLUS	0x00000040
88#define	ALTF_MNTUDP	0x00000080
89#define ALTF_NORESPORT	0x00000100
90#define ALTF_SEQPACKET	0x00000200
91#define ALTF_NQNFS	0x00000400
92#define ALTF_SOFT	0x00000800
93#define ALTF_TCP	0x00001000
94#define ALTF_NFSV2	0x00002000
95#define ALTF_PORT	0x00004000
96#define ALTF_RSIZE	0x00008000
97#define ALTF_WSIZE	0x00010000
98#define ALTF_RDIRSIZE	0x00020000
99#define ALTF_MAXGRPS	0x00040000
100#define ALTF_LEASETERM	0x00080000
101#define ALTF_READAHEAD	0x00100000
102#define ALTF_DEADTHRESH	0x00200000
103#define ALTF_TIMEO	0x00400000
104#define ALTF_RETRANS	0x00800000
105
106static const struct mntopt mopts[] = {
107	MOPT_STDOPTS,
108	MOPT_FORCE,
109	MOPT_UPDATE,
110	MOPT_GETARGS,
111	{ "bg", 0, ALTF_BG, 1 },
112	{ "conn", 0, ALTF_CONN, 1 },
113	{ "dumbtimer", 0, ALTF_DUMBTIMR, 1 },
114	{ "intr", 0, ALTF_INTR, 1 },
115	{ "nfsv3", 0, ALTF_NFSV3, 1 },
116	{ "rdirplus", 0, ALTF_RDIRPLUS, 1 },
117	{ "mntudp", 0, ALTF_MNTUDP, 1 },
118	{ "resport", 1, ALTF_NORESPORT, 1 },
119#ifdef ISO
120	{ "seqpacket", 0, ALTF_SEQPACKET, 1 },
121#endif
122	{ "nqnfs", 0, ALTF_NQNFS, 1 },
123	{ "soft", 0, ALTF_SOFT, 1 },
124	{ "tcp", 0, ALTF_TCP, 1 },
125	{ "nfsv2", 0, ALTF_NFSV2, 1 },
126	{ "port", 0, ALTF_PORT, 1 },
127	{ "rsize", 0, ALTF_RSIZE, 1 },
128	{ "wsize", 0, ALTF_WSIZE, 1 },
129	{ "rdirsize", 0, ALTF_RDIRSIZE, 1 },
130	{ "maxgrps", 0, ALTF_MAXGRPS, 1 },
131	{ "leaseterm", 0, ALTF_LEASETERM, 1 },
132	{ "readahead", 0, ALTF_READAHEAD, 1 },
133	{ "deadthresh", 0, ALTF_DEADTHRESH, 1 },
134	{ "timeo", 0, ALTF_TIMEO, 1 },
135	MOPT_NULL,
136
137};
138
139struct nfs_args nfsdefargs = {
140	.version = NFS_ARGSVERSION,
141	.addr = NULL,
142	.addrlen = sizeof(struct sockaddr_in),
143	.sotype = SOCK_DGRAM,
144	.proto = 0,
145	.fh = NULL,
146	.fhsize = 0,
147	.flags = NFSMNT_NFSV3|NFSMNT_NOCONN|NFSMNT_RESVPORT,
148	.wsize = NFS_WSIZE,
149	.rsize = NFS_RSIZE,
150	.readdirsize = NFS_READDIRSIZE,
151	.timeo = 10,
152	.retrans = NFS_RETRANS,
153	.maxgrouplist = NFS_MAXGRPS,
154	.readahead = NFS_DEFRAHEAD,
155	.leaseterm = 0,	/* Ignored; lease term */
156	.deadthresh = NFS_DEFDEADTHRESH,
157	.hostname = NULL,
158};
159
160#define DEF_RETRY 10000
161
162int retrycnt = DEF_RETRY;
163int opflags = 0;
164int force2 = 0;
165int force3 = 0;
166int mnttcp_ok = 1;
167int port = 0;
168
169static void	shownfsargs(const struct nfs_args *);
170#ifdef ISO
171static struct	iso_addr *iso_addr(const char *);
172#endif
173int	mount_nfs(int argc, char **argv);
174/* void	set_rpc_maxgrouplist(int); */
175__dead static void	usage(void);
176
177#ifndef MOUNT_NOMAIN
178int
179main(int argc, char **argv)
180{
181
182	setprogname(argv[0]);
183	return mount_nfs(argc, argv);
184}
185#endif
186
187void
188mount_nfs_dogetargs(struct nfs_args *nfsargsp, int mntflags, const char *spec)
189{
190	static struct sockaddr_storage sa;
191	char *tspec;
192
193	if ((mntflags & MNT_GETARGS) != 0) {
194		memset(&sa, 0, sizeof(sa));
195		nfsargsp->addr = (struct sockaddr *)&sa;
196		nfsargsp->addrlen = sizeof(sa);
197	} else {
198		if ((tspec = strdup(spec)) == NULL) {
199			err(1, "strdup");
200		}
201		if (!getnfsargs(tspec, nfsargsp)) {
202			exit(1);
203		}
204		free(tspec);
205	}
206}
207
208void
209mount_nfs_parseargs(int argc, char *argv[],
210	struct nfs_args *nfsargsp, int *mntflags,
211	char *spec, char *name)
212{
213	char *p;
214	int altflags, num;
215	int c;
216	mntoptparse_t mp;
217
218	*mntflags = 0;
219	altflags = 0;
220	memset(nfsargsp, 0, sizeof(*nfsargsp));
221	*nfsargsp = nfsdefargs;
222	while ((c = getopt(argc, argv,
223	    "23a:bcCdD:g:I:iKL:lm:o:PpqR:r:sTt:w:x:UX")) != -1)
224		switch (c) {
225		case '3':
226		case 'q':
227			if (force2)
228				errx(1, "conflicting version options");
229			force3 = 1;
230			break;
231		case '2':
232			if (force3)
233				errx(1, "conflicting version options");
234			force2 = 1;
235			nfsargsp->flags &= ~NFSMNT_NFSV3;
236			break;
237		case 'a':
238			num = strtol(optarg, &p, 10);
239			if (*p || num < 0)
240				errx(1, "illegal -a value -- %s", optarg);
241			nfsargsp->readahead = num;
242			nfsargsp->flags |= NFSMNT_READAHEAD;
243			break;
244		case 'b':
245			opflags |= BGRND;
246			break;
247		case 'c':
248			nfsargsp->flags |= NFSMNT_NOCONN;
249			break;
250		case 'C':
251			nfsargsp->flags &= ~NFSMNT_NOCONN;
252			break;
253		case 'D':
254			num = strtol(optarg, &p, 10);
255			if (*p || num <= 0)
256				errx(1, "illegal -D value -- %s", optarg);
257			nfsargsp->deadthresh = num;
258			nfsargsp->flags |= NFSMNT_DEADTHRESH;
259			break;
260		case 'd':
261			nfsargsp->flags |= NFSMNT_DUMBTIMR;
262			break;
263#if 0 /* XXXX */
264		case 'g':
265			num = strtol(optarg, &p, 10);
266			if (*p || num <= 0)
267				errx(1, "illegal -g value -- %s", optarg);
268			set_rpc_maxgrouplist(num);
269			nfsargsp->maxgrouplist = num;
270			nfsargsp->flags |= NFSMNT_MAXGRPS;
271			break;
272#endif
273		case 'I':
274			num = strtol(optarg, &p, 10);
275			if (*p || num <= 0)
276				errx(1, "illegal -I value -- %s", optarg);
277			nfsargsp->readdirsize = num;
278			nfsargsp->flags |= NFSMNT_READDIRSIZE;
279			break;
280		case 'i':
281			nfsargsp->flags |= NFSMNT_INT;
282			break;
283		case 'L':
284			/* ignore */
285			break;
286		case 'l':
287			nfsargsp->flags |= NFSMNT_RDIRPLUS;
288			break;
289		case 'o':
290			mp = getmntopts(optarg, mopts, mntflags, &altflags);
291			if (mp == NULL)
292				err(1, "getmntopts");
293			if (altflags & ALTF_BG)
294				opflags |= BGRND;
295			if (altflags & ALTF_CONN)
296				nfsargsp->flags &= ~NFSMNT_NOCONN;
297			if (altflags & ALTF_DUMBTIMR)
298				nfsargsp->flags |= NFSMNT_DUMBTIMR;
299			if (altflags & ALTF_INTR)
300				nfsargsp->flags |= NFSMNT_INT;
301			if (altflags & (ALTF_NFSV3|ALTF_NQNFS)) {
302				if (force2)
303					errx(1, "conflicting version options");
304				force3 = 1;
305			}
306			if (altflags & ALTF_NFSV2) {
307				if (force3)
308					errx(1, "conflicting version options");
309				force2 = 1;
310				nfsargsp->flags &= ~NFSMNT_NFSV3;
311			}
312			if (altflags & ALTF_RDIRPLUS)
313				nfsargsp->flags |= NFSMNT_RDIRPLUS;
314			if (altflags & ALTF_MNTUDP)
315				mnttcp_ok = 0;
316			if (altflags & ALTF_NORESPORT)
317				nfsargsp->flags &= ~NFSMNT_RESVPORT;
318#ifdef ISO
319			if (altflags & ALTF_SEQPACKET)
320				nfsargsp->sotype = SOCK_SEQPACKET;
321#endif
322			if (altflags & ALTF_SOFT)
323				nfsargsp->flags |= NFSMNT_SOFT;
324			if (altflags & ALTF_TCP) {
325				nfsargsp->sotype = SOCK_STREAM;
326			}
327			if (altflags & ALTF_PORT) {
328				port = getmntoptnum(mp, "port");
329			}
330			if (altflags & ALTF_RSIZE) {
331				nfsargsp->rsize =
332				    (int)getmntoptnum(mp, "rsize");
333				nfsargsp->flags |= NFSMNT_RSIZE;
334			}
335			if (altflags & ALTF_WSIZE) {
336				nfsargsp->wsize =
337				    (int)getmntoptnum(mp, "wsize");
338				nfsargsp->flags |= NFSMNT_WSIZE;
339			}
340			if (altflags & ALTF_RDIRSIZE) {
341				nfsargsp->rsize =
342				    (int)getmntoptnum(mp, "rdirsize");
343				nfsargsp->flags |= NFSMNT_READDIRSIZE;
344			}
345#if 0
346			if (altflags & ALTF_MAXGRPS) {
347				set_rpc_maxgrouplist(num);
348				nfsargsp->maxgrouplist =
349				    (int)getmntoptnum(mp, "maxgrps");
350				nfsargsp->flags |= NFSMNT_MAXGRPS;
351			}
352#endif
353			if (altflags & ALTF_LEASETERM) {
354				nfsargsp->leaseterm =
355				(int)getmntoptnum(mp, "leaseterm");
356				nfsargsp->flags |= NFSMNT_LEASETERM;
357			}
358			if (altflags & ALTF_READAHEAD) {
359				nfsargsp->readahead =
360				    (int)getmntoptnum(mp, "readahead");
361				nfsargsp->flags |= NFSMNT_READAHEAD;
362			}
363			if (altflags & ALTF_DEADTHRESH) {
364				nfsargsp->deadthresh =
365				    (int)getmntoptnum(mp, "deadthresh");
366				nfsargsp->flags |= NFSMNT_DEADTHRESH;
367			}
368			if (altflags & ALTF_TIMEO) {
369				nfsargsp->timeo =
370				    (int)getmntoptnum(mp, "timeo");
371				nfsargsp->flags |= NFSMNT_TIMEO;
372			}
373			if (altflags & ALTF_RETRANS) {
374				nfsargsp->retrans =
375				    (int)getmntoptnum(mp, "retrans");
376				nfsargsp->flags |= NFSMNT_RETRANS;
377			}
378			altflags = 0;
379			freemntopts(mp);
380			break;
381		case 'P':
382			nfsargsp->flags |= NFSMNT_RESVPORT;
383			break;
384		case 'p':
385			nfsargsp->flags &= ~NFSMNT_RESVPORT;
386			break;
387		case 'R':
388			num = strtol(optarg, &p, 10);
389			if (*p || num <= 0)
390				errx(1, "illegal -R value -- %s", optarg);
391			retrycnt = num;
392			break;
393		case 'r':
394			num = strtol(optarg, &p, 10);
395			if (*p || num <= 0)
396				errx(1, "illegal -r value -- %s", optarg);
397			nfsargsp->rsize = num;
398			nfsargsp->flags |= NFSMNT_RSIZE;
399			break;
400#ifdef ISO
401		case 'S':
402			nfsargsp->sotype = SOCK_SEQPACKET;
403			break;
404#endif
405		case 's':
406			nfsargsp->flags |= NFSMNT_SOFT;
407			break;
408		case 'T':
409			nfsargsp->sotype = SOCK_STREAM;
410			break;
411		case 't':
412			num = strtol(optarg, &p, 10);
413			if (*p || num <= 0)
414				errx(1, "illegal -t value -- %s", optarg);
415			nfsargsp->timeo = num;
416			nfsargsp->flags |= NFSMNT_TIMEO;
417			break;
418		case 'w':
419			num = strtol(optarg, &p, 10);
420			if (*p || num <= 0)
421				errx(1, "illegal -w value -- %s", optarg);
422			nfsargsp->wsize = num;
423			nfsargsp->flags |= NFSMNT_WSIZE;
424			break;
425		case 'x':
426			num = strtol(optarg, &p, 10);
427			if (*p || num <= 0)
428				errx(1, "illegal -x value -- %s", optarg);
429			nfsargsp->retrans = num;
430			nfsargsp->flags |= NFSMNT_RETRANS;
431			break;
432		case 'X':
433			nfsargsp->flags |= NFSMNT_XLATECOOKIE;
434			break;
435		case 'U':
436			mnttcp_ok = 0;
437			break;
438		default:
439			usage();
440			break;
441		}
442	argc -= optind;
443	argv += optind;
444
445	if (argc != 2)
446		usage();
447
448	strlcpy(spec, *argv++, MAXPATHLEN);
449	pathadj(*argv, name);
450	mount_nfs_dogetargs(nfsargsp, *mntflags, spec);
451}
452
453int
454mount_nfs(int argc, char *argv[])
455{
456	char spec[MAXPATHLEN], name[MAXPATHLEN];
457	struct nfs_args args;
458	int mntflags;
459	int retval;
460
461	mount_nfs_parseargs(argc, argv, &args, &mntflags, spec, name);
462
463 retry:
464	if ((retval = mount(MOUNT_NFS, name, mntflags,
465	    &args, sizeof args)) == -1) {
466		/* Did we just default to v3 on a v2-only kernel?
467		 * If so, default to v2 & try again */
468		if (errno == EPROGMISMATCH &&
469		    (args.flags & NFSMNT_NFSV3) != 0 && !force3) {
470			/*
471			 * fall back to v2.  XXX lack of V3 umount.
472			 */
473			args.flags &= ~NFSMNT_NFSV3;
474			mount_nfs_dogetargs(&args, mntflags, spec);
475			goto retry;
476		}
477	}
478	if (retval == -1)
479		err(1, "%s on %s", spec, name);
480	if (mntflags & MNT_GETARGS) {
481		shownfsargs(&args);
482		return (0);
483	}
484
485	exit(0);
486}
487
488static void
489shownfsargs(const struct nfs_args *nfsargsp)
490{
491	char fbuf[2048];
492	char host[NI_MAXHOST], serv[NI_MAXSERV];
493	int error;
494
495	(void)snprintb(fbuf, sizeof(fbuf), NFSMNT_BITS, nfsargsp->flags);
496	if (nfsargsp->addr != NULL) {
497		error = getnameinfo(nfsargsp->addr, nfsargsp->addrlen, host,
498		    sizeof(host), serv, sizeof(serv),
499		    NI_NUMERICHOST | NI_NUMERICSERV);
500		if (error != 0)
501			warnx("getnameinfo: %s", gai_strerror(error));
502	} else
503		error = -1;
504
505	if (error == 0)
506		printf("addr=%s, port=%s, addrlen=%d, ",
507		    host, serv, nfsargsp->addrlen);
508	printf("sotype=%d, proto=%d, fhsize=%d, "
509	    "flags=%s, wsize=%d, rsize=%d, readdirsize=%d, timeo=%d, "
510	    "retrans=%d, maxgrouplist=%d, readahead=%d, leaseterm=%d, "
511	    "deadthresh=%d\n",
512	    nfsargsp->sotype,
513	    nfsargsp->proto,
514	    nfsargsp->fhsize,
515	    fbuf,
516	    nfsargsp->wsize,
517	    nfsargsp->rsize,
518	    nfsargsp->readdirsize,
519	    nfsargsp->timeo,
520	    nfsargsp->retrans,
521	    nfsargsp->maxgrouplist,
522	    nfsargsp->readahead,
523	    nfsargsp->leaseterm,
524	    nfsargsp->deadthresh);
525}
526
527static void
528usage(void)
529{
530	(void)fprintf(stderr, "usage: %s %s\n%s\n%s\n%s\n%s\n", getprogname(),
531"[-23bCcdilPpqsTUX] [-a maxreadahead] [-D deadthresh]",
532"\t[-g maxgroups] [-I readdirsize] [-L leaseterm]",
533"\t[-o options] [-R retrycnt] [-r readsize] [-t timeout]",
534"\t[-w writesize] [-x retrans]",
535"\trhost:path node");
536	exit(1);
537}
538