1/*
2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if 0
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1992, 1993, 1994\n\
37 The Regents of the University of California. All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
42#endif /* not lint */
43#endif
44#include <sys/cdefs.h>
45__FBSDID("$FreeBSD: head/sbin/mount_nfs/mount_nfs.c 221124 2011-04-27 17:51:51Z rmacklem $");
46
47#include <sys/param.h>
48#include <sys/linker.h>
49#include <sys/module.h>
50#include <sys/mount.h>
51#include <sys/socket.h>
52#include <sys/stat.h>
53#include <sys/syslog.h>
54#include <sys/uio.h>
55
56#include <rpc/rpc.h>
57#include <rpc/pmap_clnt.h>
58#include <rpc/pmap_prot.h>
59#include <rpcsvc/nfs_prot.h>
60#include <rpcsvc/mount.h>
61
62#include <nfsclient/nfs.h>
63
64#include <arpa/inet.h>
65
66#include <ctype.h>
67#include <err.h>
68#include <errno.h>
69#include <fcntl.h>
70#include <netdb.h>
71#include <stdio.h>
72#include <stdlib.h>
73#include <string.h>
74#include <strings.h>
75#include <sysexits.h>
76#include <unistd.h>
77
78#include "mntopts.h"
79#include "mounttab.h"
80
81/* Table for af,sotype -> netid conversions. */
82struct nc_protos {
83 const char *netid;
84 int af;
85 int sotype;
86} nc_protos[] = {
87 {"udp", AF_INET, SOCK_DGRAM},
88 {"tcp", AF_INET, SOCK_STREAM},
89 {"udp6", AF_INET6, SOCK_DGRAM},
90 {"tcp6", AF_INET6, SOCK_STREAM},
91 {NULL, 0, 0}
92};
93
94struct nfhret {
95 u_long stat;
96 long vers;
97 long auth;
98 long fhsize;
99 u_char nfh[NFS3_FHSIZE];
100};
101#define BGRND 1
102#define ISBGRND 2
103#define OF_NOINET4 4
104#define OF_NOINET6 8
105int retrycnt = -1;
106int opflags = 0;
107int nfsproto = IPPROTO_TCP;
108int mnttcp_ok = 1;
109int noconn = 0;
110char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */
111struct sockaddr *addr;
112int addrlen = 0;
113u_char *fh = NULL;
114int fhsize = 0;
115int secflavor = -1;
116int got_principal = 0;
117
118enum mountmode {
119 ANY,
120 V2,
121 V3,
122 V4
123} mountmode = ANY;
124
125/* Return codes for nfs_tryproto. */
126enum tryret {
127 TRYRET_SUCCESS,
128 TRYRET_TIMEOUT, /* No response received. */
129 TRYRET_REMOTEERR, /* Error received from remote server. */
130 TRYRET_LOCALERR /* Local failure. */
131};
132
133static int fallback_mount(struct iovec *iov, int iovlen, int mntflags);
134static int sec_name_to_num(char *sec);
135static char *sec_num_to_name(int num);
136static int getnfsargs(char *, struct iovec **iov, int *iovlen);
137/* void set_rpc_maxgrouplist(int); */
138static struct netconfig *getnetconf_cached(const char *netid);
139static const char *netidbytype(int af, int sotype);
140static void usage(void) __dead2;
141static int xdr_dir(XDR *, char *);
142static int xdr_fh(XDR *, struct nfhret *);
143static enum tryret nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec,
144 char **errstr, struct iovec **iov, int *iovlen);
145static enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr);
146
147int
148main(int argc, char *argv[])
149{
150 int c;
151 struct iovec *iov;
152 int mntflags, num, iovlen;
153 int osversion;
154 char *name, *p, *spec, *fstype;
155 char mntpath[MAXPATHLEN], errmsg[255];
156 char hostname[MAXHOSTNAMELEN + 1], *gssname, gssn[MAXHOSTNAMELEN + 50];
157
158 mntflags = 0;
159 iov = NULL;
160 iovlen = 0;
161 memset(errmsg, 0, sizeof(errmsg));
162 gssname = NULL;
163
164 fstype = strrchr(argv[0], '_');
165 if (fstype == NULL)
166 errx(EX_USAGE, "argv[0] must end in _fstype");
167
168 ++fstype;
169
170 while ((c = getopt(argc, argv,
171 "23a:bcdD:g:I:iLlNo:PR:r:sTt:w:x:U")) != -1)
172 switch (c) {
173 case '2':
174 mountmode = V2;
175 break;
176 case '3':
177 mountmode = V3;
178 break;
179 case 'a':
180 printf("-a deprecated, use -o readahead=<value>\n");
181 build_iovec(&iov, &iovlen, "readahead", optarg, (size_t)-1);
182 break;
183 case 'b':
184 opflags |= BGRND;
185 break;
186 case 'c':
187 printf("-c deprecated, use -o noconn\n");
188 build_iovec(&iov, &iovlen, "noconn", NULL, 0);
189 noconn = 1;
190 break;
191 case 'D':
192 printf("-D deprecated, use -o deadthresh=<value>\n");
193 build_iovec(&iov, &iovlen, "deadthresh", optarg, (size_t)-1);
194 break;
195 case 'd':
196 printf("-d deprecated, use -o dumbtimer");
197 build_iovec(&iov, &iovlen, "dumbtimer", NULL, 0);
198 break;
199 case 'g':
200 printf("-g deprecated, use -o maxgroups");
201 num = strtol(optarg, &p, 10);
202 if (*p || num <= 0)
203 errx(1, "illegal -g value -- %s", optarg);
204 //set_rpc_maxgrouplist(num);
205 build_iovec(&iov, &iovlen, "maxgroups", optarg, (size_t)-1);
206 break;
207 case 'I':
208 printf("-I deprecated, use -o readdirsize=<value>\n");
209 build_iovec(&iov, &iovlen, "readdirsize", optarg, (size_t)-1);
210 break;
211 case 'i':
212 printf("-i deprecated, use -o intr\n");
213 build_iovec(&iov, &iovlen, "intr", NULL, 0);
214 break;
215 case 'L':
216 printf("-L deprecated, use -o nolockd\n");
217 build_iovec(&iov, &iovlen, "nolockd", NULL, 0);
218 break;
219 case 'l':
220 printf("-l deprecated, -o rdirplus\n");
221 build_iovec(&iov, &iovlen, "rdirplus", NULL, 0);
222 break;
223 case 'N':
224 printf("-N deprecated, do not specify -o resvport\n");
225 break;
226 case 'o': {
227 int pass_flag_to_nmount;
228 char *opt = optarg;
229 while (opt) {
230 char *pval = NULL;
231 char *pnextopt = NULL;
232 char *val = "";
233 pass_flag_to_nmount = 1;
234 pnextopt = strchr(opt, ',');
235 if (pnextopt != NULL) {
236 *pnextopt = '\0';
237 pnextopt++;
238 }
239 pval = strchr(opt, '=');
240 if (pval != NULL) {
241 *pval = '\0';
242 val = pval + 1;
243 }
244 if (strcmp(opt, "bg") == 0) {
245 opflags |= BGRND;
246 pass_flag_to_nmount=0;
247 } else if (strcmp(opt, "fg") == 0) {
248 /* same as not specifying -o bg */
249 pass_flag_to_nmount=0;
250 } else if (strcmp(opt, "gssname") == 0) {
251 pass_flag_to_nmount = 0;
252 gssname = val;
253 } else if (strcmp(opt, "mntudp") == 0) {
254 mnttcp_ok = 0;
255 nfsproto = IPPROTO_UDP;
256 } else if (strcmp(opt, "udp") == 0) {
257 nfsproto = IPPROTO_UDP;
258 } else if (strcmp(opt, "tcp") == 0) {
259 nfsproto = IPPROTO_TCP;
260 } else if (strcmp(opt, "noinet4") == 0) {
261 pass_flag_to_nmount=0;
262 opflags |= OF_NOINET4;
263 } else if (strcmp(opt, "noinet6") == 0) {
264 pass_flag_to_nmount=0;
265 opflags |= OF_NOINET6;
266 } else if (strcmp(opt, "noconn") == 0) {
267 noconn = 1;
268 } else if (strcmp(opt, "nfsv2") == 0) {
269 pass_flag_to_nmount=0;
270 mountmode = V2;
271 } else if (strcmp(opt, "nfsv3") == 0) {
272 mountmode = V3;
273 } else if (strcmp(opt, "nfsv4") == 0) {
274 pass_flag_to_nmount=0;
275 mountmode = V4;
276 fstype = "nfs";
277 nfsproto = IPPROTO_TCP;
278 if (portspec == NULL)
279 portspec = "2049";
280 } else if (strcmp(opt, "port") == 0) {
281 pass_flag_to_nmount=0;
282 asprintf(&portspec, "%d",
283 atoi(val));
284 if (portspec == NULL)
285 err(1, "asprintf");
286 } else if (strcmp(opt, "principal") == 0) {
287 got_principal = 1;
288 } else if (strcmp(opt, "sec") == 0) {
289 /*
290 * Don't add this option to
291 * the iovec yet - we will
292 * negotiate which sec flavor
293 * to use with the remote
294 * mountd.
295 */
296 pass_flag_to_nmount=0;
297 secflavor = sec_name_to_num(val);
298 if (secflavor < 0) {
299 errx(1,
300 "illegal sec value -- %s",
301 val);
302 }
303 } else if (strcmp(opt, "retrycnt") == 0) {
304 pass_flag_to_nmount=0;
305 num = strtol(val, &p, 10);
306 if (*p || num < 0)
307 errx(1, "illegal retrycnt value -- %s", val);
308 retrycnt = num;
309 } else if (strcmp(opt, "maxgroups") == 0) {
310 num = strtol(val, &p, 10);
311 if (*p || num <= 0)
312 errx(1, "illegal maxgroups value -- %s", val);
313 //set_rpc_maxgrouplist(num);
314 }
315 if (pass_flag_to_nmount)
316 build_iovec(&iov, &iovlen, opt, val,
317 strlen(val) + 1);
318 opt = pnextopt;
319 }
320 }
321 break;
322 case 'P':
323 /* obsolete for -o noresvport now default */
324 printf("-P deprecated, use -o noresvport\n");
325 build_iovec(&iov, &iovlen, "noresvport", NULL, 0);
326 break;
327 case 'R':
328 printf("-R deprecated, use -o retrycnt=<retrycnt>\n");
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 printf("-r deprecated, use -o rsize=<rsize>\n");
336 build_iovec(&iov, &iovlen, "rsize", optarg, (size_t)-1);
337 break;
338 case 's':
339 printf("-s deprecated, use -o soft\n");
340 build_iovec(&iov, &iovlen, "soft", NULL, 0);
341 break;
342 case 'T':
343 nfsproto = IPPROTO_TCP;
344 printf("-T deprecated, use -o tcp\n");
345 break;
346 case 't':
347 printf("-t deprecated, use -o timeout=<value>\n");
348 build_iovec(&iov, &iovlen, "timeout", optarg, (size_t)-1);
349 break;
350 case 'w':
351 printf("-w deprecated, use -o wsize=<value>\n");
352 build_iovec(&iov, &iovlen, "wsize", optarg, (size_t)-1);
353 break;
354 case 'x':
355 printf("-x deprecated, use -o retrans=<value>\n");
356 build_iovec(&iov, &iovlen, "retrans", optarg, (size_t)-1);
357 break;
358 case 'U':
359 printf("-U deprecated, use -o mntudp\n");
360 mnttcp_ok = 0;
361 nfsproto = IPPROTO_UDP;
362 build_iovec(&iov, &iovlen, "mntudp", NULL, 0);
363 break;
364 default:
365 usage();
366 break;
367 }
368 argc -= optind;
369 argv += optind;
370
371 if (argc != 2) {
372 usage();
373 /* NOTREACHED */
374 }
375
376 spec = *argv++;
377 name = *argv;
378
379 if (retrycnt == -1)
380 /* The default is to keep retrying forever. */
381 retrycnt = 0;
382
383 /*
384 * If the fstye is "oldnfs", run the old NFS client unless the
385 * "nfsv4" option was specified.
386 */
387 if (strcmp(fstype, "nfs") == 0) {
388 if (modfind("nfscl") < 0) {
389 /* Not present in kernel, try loading it */
390 if (kldload("nfscl") < 0 ||
391 modfind("nfscl") < 0)
392 errx(1, "nfscl is not available");
393 }
394 }
395
396 /*
397 * Add the fqdn to the gssname, as required.
398 */
399 if (gssname != NULL) {
400 if (strchr(gssname, '@') == NULL &&
401 gethostname(hostname, MAXHOSTNAMELEN) == 0) {
402 snprintf(gssn, sizeof (gssn), "%s@%s", gssname,
403 hostname);
404 gssname = gssn;
405 }
406 build_iovec(&iov, &iovlen, "gssname", gssname,
407 strlen(gssname) + 1);
408 }
409
410 if (!getnfsargs(spec, &iov, &iovlen))
411 exit(1);
412
413 /* resolve the mountpoint with realpath(3) */
414 (void)checkpath(name, mntpath);
415
416 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
417 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
418 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
419
420 /*
421 * XXX:
422 * Backwards compatibility routines for older kernels.
423 * Remove this and fallback_mount() code when we do not need to support
424 * NFS mounts against older kernels which still need
425 * struct nfs_args to be passed in via nmount().
426 */
427 osversion = getosreldate();
428 if (osversion >= 702100) {
429 if (nmount(iov, iovlen, mntflags))
430 err(1, "%s, %s", mntpath, errmsg);
431 } else {
432 if (fallback_mount(iov, iovlen, mntflags))
433 err(1, "%s, %s", mntpath, errmsg);
434 }
435
436 exit(0);
437}
438
439static int
440findopt(struct iovec *iov, int iovlen, const char *name,
441 char **valuep, int *lenp)
442{
443 int i;
444
445 for (i = 0; i < iovlen/2; i++, iov += 2) {
446 if (strcmp(name, iov[0].iov_base) == 0) {
447 if (valuep)
448 *valuep = iov[1].iov_base;
449 if (lenp)
450 *lenp = iov[1].iov_len;
451 return (0);
452 }
453 }
454 return (ENOENT);
455}
456
457static void
458copyopt(struct iovec **newiov, int *newiovlen,
459 struct iovec *iov, int iovlen, const char *name)
460{
461 char *value;
462 int len;
463
464 if (findopt(iov, iovlen, name, &value, &len) == 0)
465 build_iovec(newiov, newiovlen, name, value, len);
466}
467
468/*
469 * XXX: This function is provided for backwards
470 * compatibility with older kernels which did not support
471 * passing NFS mount options to nmount() as individual
472 * parameters. It should be eventually be removed.
473 */
474static int
475fallback_mount(struct iovec *iov, int iovlen, int mntflags)
476{
477 struct nfs_args args = {
478 .version = NFS_ARGSVERSION,
479 .addr = NULL,
480 .addrlen = sizeof (struct sockaddr_in),
481 .sotype = SOCK_STREAM,
482 .proto = 0,
483 .fh = NULL,
484 .fhsize = 0,
485 .flags = NFSMNT_RESVPORT,
486 .wsize = NFS_WSIZE,
487 .rsize = NFS_RSIZE,
488 .readdirsize = NFS_READDIRSIZE,
489 .timeo = 10,
490 .retrans = NFS_RETRANS,
491 .maxgrouplist = NFS_MAXGRPS,
492 .readahead = NFS_DEFRAHEAD,
493 .wcommitsize = 0, /* was: NQ_DEFLEASE */
494 .deadthresh = NFS_MAXDEADTHRESH, /* was: NQ_DEADTHRESH */
495 .hostname = NULL,
496 /* args version 4 */
497 .acregmin = NFS_MINATTRTIMO,
498 .acregmax = NFS_MAXATTRTIMO,
499 .acdirmin = NFS_MINDIRATTRTIMO,
500 .acdirmax = NFS_MAXDIRATTRTIMO,
501 };
502 int ret;
503 char *opt;
504 struct iovec *newiov;
505 int newiovlen;
506
507 if (findopt(iov, iovlen, "dumbtimer", NULL, NULL) == 0)
508 args.flags |= NFSMNT_DUMBTIMR;
509 if (findopt(iov, iovlen, "noconn", NULL, NULL) == 0)
510 args.flags |= NFSMNT_NOCONN;
511 if (findopt(iov, iovlen, "conn", NULL, NULL) == 0)
512 args.flags |= NFSMNT_NOCONN;
513 if (findopt(iov, iovlen, "nolockd", NULL, NULL) == 0)
514 args.flags |= NFSMNT_NOLOCKD;
515 if (findopt(iov, iovlen, "lockd", NULL, NULL) == 0)
516 args.flags &= ~NFSMNT_NOLOCKD;
517 if (findopt(iov, iovlen, "intr", NULL, NULL) == 0)
518 args.flags |= NFSMNT_INT;
519 if (findopt(iov, iovlen, "rdirplus", NULL, NULL) == 0)
520 args.flags |= NFSMNT_RDIRPLUS;
521 if (findopt(iov, iovlen, "resvport", NULL, NULL) == 0)
522 args.flags |= NFSMNT_RESVPORT;
523 if (findopt(iov, iovlen, "noresvport", NULL, NULL) == 0)
524 args.flags &= ~NFSMNT_RESVPORT;
525 if (findopt(iov, iovlen, "soft", NULL, NULL) == 0)
526 args.flags |= NFSMNT_SOFT;
527 if (findopt(iov, iovlen, "hard", NULL, NULL) == 0)
528 args.flags &= ~NFSMNT_SOFT;
529 if (findopt(iov, iovlen, "mntudp", NULL, NULL) == 0)
530 args.sotype = SOCK_DGRAM;
531 if (findopt(iov, iovlen, "udp", NULL, NULL) == 0)
532 args.sotype = SOCK_DGRAM;
533 if (findopt(iov, iovlen, "tcp", NULL, NULL) == 0)
534 args.sotype = SOCK_STREAM;
535 if (findopt(iov, iovlen, "nfsv3", NULL, NULL) == 0)
536 args.flags |= NFSMNT_NFSV3;
537 if (findopt(iov, iovlen, "readdirsize", &opt, NULL) == 0) {
538 if (opt == NULL) {
539 errx(1, "illegal readdirsize");
540 }
541 ret = sscanf(opt, "%d", &args.readdirsize);
542 if (ret != 1 || args.readdirsize <= 0) {
543 errx(1, "illegal readdirsize: %s", opt);
544 }
545 args.flags |= NFSMNT_READDIRSIZE;
546 }
547 if (findopt(iov, iovlen, "readahead", &opt, NULL) == 0) {
548 if (opt == NULL) {
549 errx(1, "illegal readahead");
550 }
551 ret = sscanf(opt, "%d", &args.readahead);
552 if (ret != 1 || args.readahead <= 0) {
553 errx(1, "illegal readahead: %s", opt);
554 }
555 args.flags |= NFSMNT_READAHEAD;
556 }
557 if (findopt(iov, iovlen, "wsize", &opt, NULL) == 0) {
558 if (opt == NULL) {
559 errx(1, "illegal wsize");
560 }
561 ret = sscanf(opt, "%d", &args.wsize);
562 if (ret != 1 || args.wsize <= 0) {
563 errx(1, "illegal wsize: %s", opt);
564 }
565 args.flags |= NFSMNT_WSIZE;
566 }
567 if (findopt(iov, iovlen, "rsize", &opt, NULL) == 0) {
568 if (opt == NULL) {
569 errx(1, "illegal rsize");
570 }
571 ret = sscanf(opt, "%d", &args.rsize);
572 if (ret != 1 || args.rsize <= 0) {
573 errx(1, "illegal wsize: %s", opt);
574 }
575 args.flags |= NFSMNT_RSIZE;
576 }
577 if (findopt(iov, iovlen, "retrans", &opt, NULL) == 0) {
578 if (opt == NULL) {
579 errx(1, "illegal retrans");
580 }
581 ret = sscanf(opt, "%d", &args.retrans);
582 if (ret != 1 || args.retrans <= 0) {
583 errx(1, "illegal retrans: %s", opt);
584 }
585 args.flags |= NFSMNT_RETRANS;
586 }
587 if (findopt(iov, iovlen, "acregmin", &opt, NULL) == 0) {
588 ret = sscanf(opt, "%d", &args.acregmin);
589 if (ret != 1 || args.acregmin < 0) {
590 errx(1, "illegal acregmin: %s", opt);
591 }
592 args.flags |= NFSMNT_ACREGMIN;
593 }
594 if (findopt(iov, iovlen, "acregmax", &opt, NULL) == 0) {
595 ret = sscanf(opt, "%d", &args.acregmax);
596 if (ret != 1 || args.acregmax < 0) {
597 errx(1, "illegal acregmax: %s", opt);
598 }
599 args.flags |= NFSMNT_ACREGMAX;
600 }
601 if (findopt(iov, iovlen, "acdirmin", &opt, NULL) == 0) {
602 ret = sscanf(opt, "%d", &args.acdirmin);
603 if (ret != 1 || args.acdirmin < 0) {
604 errx(1, "illegal acdirmin: %s", opt);
605 }
606 args.flags |= NFSMNT_ACDIRMIN;
607 }
608 if (findopt(iov, iovlen, "acdirmax", &opt, NULL) == 0) {
609 ret = sscanf(opt, "%d", &args.acdirmax);
610 if (ret != 1 || args.acdirmax < 0) {
611 errx(1, "illegal acdirmax: %s", opt);
612 }
613 args.flags |= NFSMNT_ACDIRMAX;
614 }
615 if (findopt(iov, iovlen, "deadthresh", &opt, NULL) == 0) {
616 ret = sscanf(opt, "%d", &args.deadthresh);
617 if (ret != 1 || args.deadthresh <= 0) {
618 errx(1, "illegal deadthresh: %s", opt);
619 }
620 args.flags |= NFSMNT_DEADTHRESH;
621 }
622 if (findopt(iov, iovlen, "timeout", &opt, NULL) == 0) {
623 ret = sscanf(opt, "%d", &args.timeo);
624 if (ret != 1 || args.timeo <= 0) {
625 errx(1, "illegal timeout: %s", opt);
626 }
627 args.flags |= NFSMNT_TIMEO;
628 }
629 if (findopt(iov, iovlen, "maxgroups", &opt, NULL) == 0) {
630 ret = sscanf(opt, "%d", &args.maxgrouplist);
631 if (ret != 1 || args.timeo <= 0) {
632 errx(1, "illegal maxgroups: %s", opt);
633 }
634 args.flags |= NFSMNT_MAXGRPS;
635 }
636 if (findopt(iov, iovlen, "addr", &opt,
637 &args.addrlen) == 0) {
638 args.addr = (struct sockaddr *) opt;
639 }
640 if (findopt(iov, iovlen, "fh", &opt, &args.fhsize) == 0) {
641 args.fh = opt;
642 }
643 if (findopt(iov, iovlen, "hostname", &args.hostname,
644 NULL) == 0) {
645 }
646 if (args.hostname == NULL) {
647 errx(1, "Invalid hostname");
648 }
649
650 newiov = NULL;
651 newiovlen = 0;
652
653 build_iovec(&newiov, &newiovlen, "nfs_args", &args, sizeof(args));
654 copyopt(&newiov, &newiovlen, iov, iovlen, "fstype");
655 copyopt(&newiov, &newiovlen, iov, iovlen, "fspath");
656 copyopt(&newiov, &newiovlen, iov, iovlen, "errmsg");
657
658 return nmount(newiov, newiovlen, mntflags);
659}
660
661static int
662sec_name_to_num(char *sec)
663{
664 if (!strcmp(sec, "krb5"))
665 return (RPCSEC_GSS_KRB5);
666 if (!strcmp(sec, "krb5i"))
667 return (RPCSEC_GSS_KRB5I);
668 if (!strcmp(sec, "krb5p"))
669 return (RPCSEC_GSS_KRB5P);
670 if (!strcmp(sec, "sys"))
671 return (AUTH_SYS);
672 return (-1);
673}
674
675static char *
676sec_num_to_name(int flavor)
677{
678 switch (flavor) {
679 case RPCSEC_GSS_KRB5:
680 return ("krb5");
681 case RPCSEC_GSS_KRB5I:
682 return ("krb5i");
683 case RPCSEC_GSS_KRB5P:
684 return ("krb5p");
685 case AUTH_SYS:
686 return ("sys");
687 }
688 return (NULL);
689}
690
691static int
692getnfsargs(char *spec, struct iovec **iov, int *iovlen)
693{
694 struct addrinfo hints, *ai_nfs, *ai;
695 enum tryret ret;
696 int ecode, speclen, remoteerr, offset, have_bracket = 0;
697 char *hostp, *delimp, *errstr;
698 size_t len;
699 static char nam[MNAMELEN + 1], pname[MAXHOSTNAMELEN + 5];
700
701 if (*spec == '[' && (delimp = strchr(spec + 1, ']')) != NULL &&
702 *(delimp + 1) == ':') {
703 hostp = spec + 1;
704 spec = delimp + 2;
705 have_bracket = 1;
706 } else if ((delimp = strrchr(spec, ':')) != NULL) {
707 hostp = spec;
708 spec = delimp + 1;
709 } else if ((delimp = strrchr(spec, '@')) != NULL) {
710 warnx("path@server syntax is deprecated, use server:path");
711 hostp = delimp + 1;
712 } else {
713 warnx("no <host>:<dirpath> nfs-name");
714 return (0);
715 }
716 *delimp = '\0';
717
718 /*
719 * If there has been a trailing slash at mounttime it seems
720 * that some mountd implementations fail to remove the mount
721 * entries from their mountlist while unmounting.
722 */
723 for (speclen = strlen(spec);
724 speclen > 1 && spec[speclen - 1] == '/';
725 speclen--)
726 spec[speclen - 1] = '\0';
727 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
728 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
729 return (0);
730 }
731 /* Make both '@' and ':' notations equal */
732 if (*hostp != '\0') {
733 len = strlen(hostp);
734 offset = 0;
735 if (have_bracket)
736 nam[offset++] = '[';
737 memmove(nam + offset, hostp, len);
738 if (have_bracket)
739 nam[len + offset++] = ']';
740 nam[len + offset++] = ':';
741 memmove(nam + len + offset, spec, speclen);
742 nam[len + speclen + offset] = '\0';
743 }
744
745 /*
746 * Handle an internet host address.
747 */
748 memset(&hints, 0, sizeof hints);
749 hints.ai_flags = AI_NUMERICHOST;
750 if (nfsproto == IPPROTO_TCP)
751 hints.ai_socktype = SOCK_STREAM;
752 else if (nfsproto == IPPROTO_UDP)
753 hints.ai_socktype = SOCK_DGRAM;
754
755 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) {
756 hints.ai_flags = AI_CANONNAME;
757 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs))
758 != 0) {
759 if (portspec == NULL)
760 errx(1, "%s: %s", hostp, gai_strerror(ecode));
761 else
762 errx(1, "%s:%s: %s", hostp, portspec,
763 gai_strerror(ecode));
764 return (0);
765 }
766
767 /*
768 * For a Kerberized nfs mount where the "principal"
769 * argument has not been set, add it here.
770 */
771 if (got_principal == 0 && secflavor >= 0 &&
772 secflavor != AUTH_SYS && ai_nfs->ai_canonname != NULL) {
773 snprintf(pname, sizeof (pname), "nfs@%s",
774 ai_nfs->ai_canonname);
775 build_iovec(iov, iovlen, "principal", pname,
776 strlen(pname) + 1);
777 }
778 }
779
780 ret = TRYRET_LOCALERR;
781 for (;;) {
782 /*
783 * Try each entry returned by getaddrinfo(). Note the
784 * occurence of remote errors by setting `remoteerr'.
785 */
786 remoteerr = 0;
787 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) {
788 if ((ai->ai_family == AF_INET6) &&
789 (opflags & OF_NOINET6))
790 continue;
791 if ((ai->ai_family == AF_INET) &&
792 (opflags & OF_NOINET4))
793 continue;
794 ret = nfs_tryproto(ai, hostp, spec, &errstr, iov,
795 iovlen);
796 if (ret == TRYRET_SUCCESS)
797 break;
798 if (ret != TRYRET_LOCALERR)
799 remoteerr = 1;
800 if ((opflags & ISBGRND) == 0)
801 fprintf(stderr, "%s\n", errstr);
802 }
803 if (ret == TRYRET_SUCCESS)
804 break;
805
806 /* Exit if all errors were local. */
807 if (!remoteerr)
808 exit(1);
809
810 /*
811 * If retrycnt == 0, we are to keep retrying forever.
812 * Otherwise decrement it, and exit if it hits zero.
813 */
814 if (retrycnt != 0 && --retrycnt == 0)
815 exit(1);
816
817 if ((opflags & (BGRND | ISBGRND)) == BGRND) {
818 warnx("Cannot immediately mount %s:%s, backgrounding",
819 hostp, spec);
820 opflags |= ISBGRND;
821 if (daemon(0, 0) != 0)
822 err(1, "daemon");
823 }
824 sleep(60);
825 }
826 freeaddrinfo(ai_nfs);
827
828 build_iovec(iov, iovlen, "hostname", nam, (size_t)-1);
829 /* Add mounted file system to PATH_MOUNTTAB */
830 if (!add_mtab(hostp, spec))
831 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
832 return (1);
833}
834
835/*
836 * Try to set up the NFS arguments according to the address
837 * family, protocol (and possibly port) specified in `ai'.
838 *
839 * Returns TRYRET_SUCCESS if successful, or:
840 * TRYRET_TIMEOUT The server did not respond.
841 * TRYRET_REMOTEERR The server reported an error.
842 * TRYRET_LOCALERR Local failure.
843 *
844 * In all error cases, *errstr will be set to a statically-allocated string
845 * describing the error.
846 */
847static enum tryret
848nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec, char **errstr,
849 struct iovec **iov, int *iovlen)
850{
851 static char errbuf[256];
852 struct sockaddr_storage nfs_ss;
853 struct netbuf nfs_nb;
854 struct nfhret nfhret;
855 struct timeval try;
856 struct rpc_err rpcerr;
857 CLIENT *clp;
858 struct netconfig *nconf, *nconf_mnt;
859 const char *netid, *netid_mnt;
860 char *secname;
861 int doconnect, nfsvers, mntvers, sotype;
862 enum clnt_stat stat;
863 enum mountmode trymntmode;
864
865 sotype = 0;
866 trymntmode = mountmode;
867 errbuf[0] = '\0';
868 *errstr = errbuf;
869
870 if (nfsproto == IPPROTO_TCP)
871 sotype = SOCK_STREAM;
872 else if (nfsproto == IPPROTO_UDP)
873 sotype = SOCK_DGRAM;
874
875 if ((netid = netidbytype(ai->ai_family, sotype)) == NULL) {
876 snprintf(errbuf, sizeof errbuf,
877 "af %d sotype %d not supported", ai->ai_family, sotype);
878 return (TRYRET_LOCALERR);
879 }
880 if ((nconf = getnetconf_cached(netid)) == NULL) {
881 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror());
882 return (TRYRET_LOCALERR);
883 }
884 /* The RPCPROG_MNT netid may be different. */
885 if (mnttcp_ok) {
886 netid_mnt = netid;
887 nconf_mnt = nconf;
888 } else {
889 if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM))
890 == NULL) {
891 snprintf(errbuf, sizeof errbuf,
892 "af %d sotype SOCK_DGRAM not supported",
893 ai->ai_family);
894 return (TRYRET_LOCALERR);
895 }
896 if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) {
897 snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt,
898 nc_sperror());
899 return (TRYRET_LOCALERR);
900 }
901 }
902
903tryagain:
904 if (trymntmode == V4) {
905 nfsvers = 4;
906 } else if (trymntmode == V2) {
907 nfsvers = 2;
908 mntvers = 1;
909 } else {
910 nfsvers = 3;
911 mntvers = 3;
912 }
913
914 if (portspec != NULL) {
915 /* `ai' contains the complete nfsd sockaddr. */
916 nfs_nb.buf = ai->ai_addr;
917 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen;
918 } else {
919 /* Ask the remote rpcbind. */
920 nfs_nb.buf = &nfs_ss;
921 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss;
922
923 if (!rpcb_getaddr(NFS_PROGRAM, nfsvers, nconf, &nfs_nb,
924 hostp)) {
925 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH &&
926 trymntmode == ANY) {
927 trymntmode = V2;
928 goto tryagain;
929 }
930 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s",
931 netid, hostp, spec,
932 clnt_spcreateerror("RPCPROG_NFS"));
933 return (returncode(rpc_createerr.cf_stat,
934 &rpc_createerr.cf_error));
935 }
936 }
937
938 /* Check that the server (nfsd) responds on the port we have chosen. */
939 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, NFS_PROGRAM, nfsvers,
940 0, 0);
941 if (clp == NULL) {
942 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
943 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS"));
944 return (returncode(rpc_createerr.cf_stat,
945 &rpc_createerr.cf_error));
946 }
947 if (sotype == SOCK_DGRAM && noconn == 0) {
948 /*
949 * Use connect(), to match what the kernel does. This
950 * catches cases where the server responds from the
951 * wrong source address.
952 */
953 doconnect = 1;
954 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) {
955 clnt_destroy(clp);
956 snprintf(errbuf, sizeof errbuf,
957 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp,
958 spec);
959 return (TRYRET_LOCALERR);
960 }
961 }
962
963 try.tv_sec = 10;
964 try.tv_usec = 0;
965 stat = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL,
966 (xdrproc_t)xdr_void, NULL, try);
967 if (stat != RPC_SUCCESS) {
968 if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
969 clnt_destroy(clp);
970 trymntmode = V2;
971 goto tryagain;
972 }
973 clnt_geterr(clp, &rpcerr);
974 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
975 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL"));
976 clnt_destroy(clp);
977 return (returncode(stat, &rpcerr));
978 }
979 clnt_destroy(clp);
980
981 /*
982 * For NFSv4, there is no mount protocol.
983 */
984 if (trymntmode == V4) {
985 /*
986 * Store the server address in nfsargsp, making
987 * sure to copy any locally allocated structures.
988 */
989 addrlen = nfs_nb.len;
990 addr = malloc(addrlen);
991 if (addr == NULL)
992 err(1, "malloc");
993 bcopy(nfs_nb.buf, addr, addrlen);
994
995 build_iovec(iov, iovlen, "addr", addr, addrlen);
996 secname = sec_num_to_name(secflavor);
997 if (secname != NULL)
998 build_iovec(iov, iovlen, "sec", secname, (size_t)-1);
999 build_iovec(iov, iovlen, "nfsv4", NULL, 0);
1000 build_iovec(iov, iovlen, "dirpath", spec, (size_t)-1);
1001
1002 return (TRYRET_SUCCESS);
1003 }
1004
1005 /* Send the MOUNTPROC_MNT RPC to get the root filehandle. */
1006 try.tv_sec = 10;
1007 try.tv_usec = 0;
1008 clp = clnt_tp_create(hostp, MOUNTPROG, mntvers, nconf_mnt);
1009 if (clp == NULL) {
1010 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
1011 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create"));
1012 return (returncode(rpc_createerr.cf_stat,
1013 &rpc_createerr.cf_error));
1014 }
1015 clp->cl_auth = authsys_create_default();
1016 nfhret.auth = secflavor;
1017 nfhret.vers = mntvers;
1018 stat = clnt_call(clp, MOUNTPROC_MNT, (xdrproc_t)xdr_dir, spec,
1019 (xdrproc_t)xdr_fh, &nfhret,
1020 try);
1021 auth_destroy(clp->cl_auth);
1022 if (stat != RPC_SUCCESS) {
1023 if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
1024 clnt_destroy(clp);
1025 trymntmode = V2;
1026 goto tryagain;
1027 }
1028 clnt_geterr(clp, &rpcerr);
1029 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
1030 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT"));
1031 clnt_destroy(clp);
1032 return (returncode(stat, &rpcerr));
1033 }
1034 clnt_destroy(clp);
1035
1036 if (nfhret.stat != 0) {
1037 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
1038 hostp, spec, strerror(nfhret.stat));
1039 return (TRYRET_REMOTEERR);
1040 }
1041
1042 /*
1043 * Store the filehandle and server address in nfsargsp, making
1044 * sure to copy any locally allocated structures.
1045 */
1046 addrlen = nfs_nb.len;
1047 addr = malloc(addrlen);
1048 fhsize = nfhret.fhsize;
1049 fh = malloc(fhsize);
1050 if (addr == NULL || fh == NULL)
1051 err(1, "malloc");
1052 bcopy(nfs_nb.buf, addr, addrlen);
1053 bcopy(nfhret.nfh, fh, fhsize);
1054
1055 build_iovec(iov, iovlen, "addr", addr, addrlen);
1056 build_iovec(iov, iovlen, "fh", fh, fhsize);
1057 secname = sec_num_to_name(nfhret.auth);
1058 if (secname)
1059 build_iovec(iov, iovlen, "sec", secname, (size_t)-1);
1060 if (nfsvers == 3)
1061 build_iovec(iov, iovlen, "nfsv3", NULL, 0);
1062
1063 return (TRYRET_SUCCESS);
1064}
1065
1066/*
1067 * Catagorise a RPC return status and error into an `enum tryret'
1068 * return code.
1069 */
1070static enum tryret
1071returncode(enum clnt_stat stat, struct rpc_err *rpcerr)
1072{
1073 switch (stat) {
1074 case RPC_TIMEDOUT:
1075 return (TRYRET_TIMEOUT);
1076 case RPC_PMAPFAILURE:
1077 case RPC_PROGNOTREGISTERED:
1078 case RPC_PROGVERSMISMATCH:
1079 /* XXX, these can be local or remote. */
1080 case RPC_CANTSEND:
1081 case RPC_CANTRECV:
1082 return (TRYRET_REMOTEERR);
1083 case RPC_SYSTEMERROR:
1084 switch (rpcerr->re_errno) {
1085 case ETIMEDOUT:
1086 return (TRYRET_TIMEOUT);
1087 case ENOMEM:
1088 break;
1089 default:
1090 return (TRYRET_REMOTEERR);
1091 }
1092 /* FALLTHROUGH */
1093 default:
1094 break;
1095 }
1096 return (TRYRET_LOCALERR);
1097}
1098
1099/*
1100 * Look up a netid based on an address family and socket type.
1101 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM.
1102 *
1103 * XXX there should be a library function for this.
1104 */
1105static const char *
1106netidbytype(int af, int sotype)
1107{
1108 struct nc_protos *p;
1109
1110 for (p = nc_protos; p->netid != NULL; p++) {
1111 if (af != p->af || sotype != p->sotype)
1112 continue;
1113 return (p->netid);
1114 }
1115 return (NULL);
1116}
1117
1118/*
1119 * Look up a netconfig entry based on a netid, and cache the result so
1120 * that we don't need to remember to call freenetconfigent().
1121 *
1122 * Otherwise it behaves just like getnetconfigent(), so nc_*error()
1123 * work on failure.
1124 */
1125static struct netconfig *
1126getnetconf_cached(const char *netid)
1127{
1128 static struct nc_entry {
1129 struct netconfig *nconf;
1130 struct nc_entry *next;
1131 } *head;
1132 struct nc_entry *p;
1133 struct netconfig *nconf;
1134
1135 for (p = head; p != NULL; p = p->next)
1136 if (strcmp(netid, p->nconf->nc_netid) == 0)
1137 return (p->nconf);
1138
1139 if ((nconf = getnetconfigent(netid)) == NULL)
1140 return (NULL);
1141 if ((p = malloc(sizeof(*p))) == NULL)
1142 err(1, "malloc");
1143 p->nconf = nconf;
1144 p->next = head;
1145 head = p;
1146
1147 return (p->nconf);
1148}
1149
1150/*
1151 * xdr routines for mount rpc's
1152 */
1153static int
1154xdr_dir(XDR *xdrsp, char *dirp)
1155{
1156 return (xdr_string(xdrsp, &dirp, MNTPATHLEN));
1157}
1158
1159static int
1160xdr_fh(XDR *xdrsp, struct nfhret *np)
1161{
1162 int i;
1163 long auth, authcnt, authfnd = 0;
1164
1165 if (!xdr_u_long(xdrsp, &np->stat))
1166 return (0);
1167 if (np->stat)
1168 return (1);
1169 switch (np->vers) {
1170 case 1:
1171 np->fhsize = NFS_FHSIZE;
1172 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFS_FHSIZE));
1173 case 3:
1174 if (!xdr_long(xdrsp, &np->fhsize))
1175 return (0);
1176 if (np->fhsize <= 0 || np->fhsize > NFS3_FHSIZE)
1177 return (0);
1178 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
1179 return (0);
1180 if (!xdr_long(xdrsp, &authcnt))
1181 return (0);
1182 for (i = 0; i < authcnt; i++) {
1183 if (!xdr_long(xdrsp, &auth))
1184 return (0);
1185 if (np->auth == -1) {
1186 np->auth = auth;
1187 authfnd++;
1188 } else if (auth == np->auth) {
1189 authfnd++;
1190 }
1191 }
1192 /*
1193 * Some servers, such as DEC's OSF/1 return a nil authenticator
1194 * list to indicate RPCAUTH_UNIX.
1195 */
1196 if (authcnt == 0 && np->auth == -1)
1197 np->auth = AUTH_SYS;
1198 if (!authfnd && (authcnt > 0 || np->auth != AUTH_SYS))
1199 np->stat = EAUTH;
1200 return (1);
1201 };
1202 return (0);
1203}
1204
1205static void
1206usage(void)
1207{
1208 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
1209"usage: mount_nfs [-23bcdiLlNPsTU] [-a maxreadahead] [-D deadthresh]",
1210" [-g maxgroups] [-I readdirsize] [-o options] [-R retrycnt]",
1211" [-r readsize] [-t timeout] [-w writesize] [-x retrans]",
1212" rhost:path node");
1213 exit(1);
1214}
2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if 0
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1992, 1993, 1994\n\
37 The Regents of the University of California. All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
42#endif /* not lint */
43#endif
44#include <sys/cdefs.h>
45__FBSDID("$FreeBSD: head/sbin/mount_nfs/mount_nfs.c 221124 2011-04-27 17:51:51Z rmacklem $");
46
47#include <sys/param.h>
48#include <sys/linker.h>
49#include <sys/module.h>
50#include <sys/mount.h>
51#include <sys/socket.h>
52#include <sys/stat.h>
53#include <sys/syslog.h>
54#include <sys/uio.h>
55
56#include <rpc/rpc.h>
57#include <rpc/pmap_clnt.h>
58#include <rpc/pmap_prot.h>
59#include <rpcsvc/nfs_prot.h>
60#include <rpcsvc/mount.h>
61
62#include <nfsclient/nfs.h>
63
64#include <arpa/inet.h>
65
66#include <ctype.h>
67#include <err.h>
68#include <errno.h>
69#include <fcntl.h>
70#include <netdb.h>
71#include <stdio.h>
72#include <stdlib.h>
73#include <string.h>
74#include <strings.h>
75#include <sysexits.h>
76#include <unistd.h>
77
78#include "mntopts.h"
79#include "mounttab.h"
80
81/* Table for af,sotype -> netid conversions. */
82struct nc_protos {
83 const char *netid;
84 int af;
85 int sotype;
86} nc_protos[] = {
87 {"udp", AF_INET, SOCK_DGRAM},
88 {"tcp", AF_INET, SOCK_STREAM},
89 {"udp6", AF_INET6, SOCK_DGRAM},
90 {"tcp6", AF_INET6, SOCK_STREAM},
91 {NULL, 0, 0}
92};
93
94struct nfhret {
95 u_long stat;
96 long vers;
97 long auth;
98 long fhsize;
99 u_char nfh[NFS3_FHSIZE];
100};
101#define BGRND 1
102#define ISBGRND 2
103#define OF_NOINET4 4
104#define OF_NOINET6 8
105int retrycnt = -1;
106int opflags = 0;
107int nfsproto = IPPROTO_TCP;
108int mnttcp_ok = 1;
109int noconn = 0;
110char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */
111struct sockaddr *addr;
112int addrlen = 0;
113u_char *fh = NULL;
114int fhsize = 0;
115int secflavor = -1;
116int got_principal = 0;
117
118enum mountmode {
119 ANY,
120 V2,
121 V3,
122 V4
123} mountmode = ANY;
124
125/* Return codes for nfs_tryproto. */
126enum tryret {
127 TRYRET_SUCCESS,
128 TRYRET_TIMEOUT, /* No response received. */
129 TRYRET_REMOTEERR, /* Error received from remote server. */
130 TRYRET_LOCALERR /* Local failure. */
131};
132
133static int fallback_mount(struct iovec *iov, int iovlen, int mntflags);
134static int sec_name_to_num(char *sec);
135static char *sec_num_to_name(int num);
136static int getnfsargs(char *, struct iovec **iov, int *iovlen);
137/* void set_rpc_maxgrouplist(int); */
138static struct netconfig *getnetconf_cached(const char *netid);
139static const char *netidbytype(int af, int sotype);
140static void usage(void) __dead2;
141static int xdr_dir(XDR *, char *);
142static int xdr_fh(XDR *, struct nfhret *);
143static enum tryret nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec,
144 char **errstr, struct iovec **iov, int *iovlen);
145static enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr);
146
147int
148main(int argc, char *argv[])
149{
150 int c;
151 struct iovec *iov;
152 int mntflags, num, iovlen;
153 int osversion;
154 char *name, *p, *spec, *fstype;
155 char mntpath[MAXPATHLEN], errmsg[255];
156 char hostname[MAXHOSTNAMELEN + 1], *gssname, gssn[MAXHOSTNAMELEN + 50];
157
158 mntflags = 0;
159 iov = NULL;
160 iovlen = 0;
161 memset(errmsg, 0, sizeof(errmsg));
162 gssname = NULL;
163
164 fstype = strrchr(argv[0], '_');
165 if (fstype == NULL)
166 errx(EX_USAGE, "argv[0] must end in _fstype");
167
168 ++fstype;
169
170 while ((c = getopt(argc, argv,
171 "23a:bcdD:g:I:iLlNo:PR:r:sTt:w:x:U")) != -1)
172 switch (c) {
173 case '2':
174 mountmode = V2;
175 break;
176 case '3':
177 mountmode = V3;
178 break;
179 case 'a':
180 printf("-a deprecated, use -o readahead=<value>\n");
181 build_iovec(&iov, &iovlen, "readahead", optarg, (size_t)-1);
182 break;
183 case 'b':
184 opflags |= BGRND;
185 break;
186 case 'c':
187 printf("-c deprecated, use -o noconn\n");
188 build_iovec(&iov, &iovlen, "noconn", NULL, 0);
189 noconn = 1;
190 break;
191 case 'D':
192 printf("-D deprecated, use -o deadthresh=<value>\n");
193 build_iovec(&iov, &iovlen, "deadthresh", optarg, (size_t)-1);
194 break;
195 case 'd':
196 printf("-d deprecated, use -o dumbtimer");
197 build_iovec(&iov, &iovlen, "dumbtimer", NULL, 0);
198 break;
199 case 'g':
200 printf("-g deprecated, use -o maxgroups");
201 num = strtol(optarg, &p, 10);
202 if (*p || num <= 0)
203 errx(1, "illegal -g value -- %s", optarg);
204 //set_rpc_maxgrouplist(num);
205 build_iovec(&iov, &iovlen, "maxgroups", optarg, (size_t)-1);
206 break;
207 case 'I':
208 printf("-I deprecated, use -o readdirsize=<value>\n");
209 build_iovec(&iov, &iovlen, "readdirsize", optarg, (size_t)-1);
210 break;
211 case 'i':
212 printf("-i deprecated, use -o intr\n");
213 build_iovec(&iov, &iovlen, "intr", NULL, 0);
214 break;
215 case 'L':
216 printf("-L deprecated, use -o nolockd\n");
217 build_iovec(&iov, &iovlen, "nolockd", NULL, 0);
218 break;
219 case 'l':
220 printf("-l deprecated, -o rdirplus\n");
221 build_iovec(&iov, &iovlen, "rdirplus", NULL, 0);
222 break;
223 case 'N':
224 printf("-N deprecated, do not specify -o resvport\n");
225 break;
226 case 'o': {
227 int pass_flag_to_nmount;
228 char *opt = optarg;
229 while (opt) {
230 char *pval = NULL;
231 char *pnextopt = NULL;
232 char *val = "";
233 pass_flag_to_nmount = 1;
234 pnextopt = strchr(opt, ',');
235 if (pnextopt != NULL) {
236 *pnextopt = '\0';
237 pnextopt++;
238 }
239 pval = strchr(opt, '=');
240 if (pval != NULL) {
241 *pval = '\0';
242 val = pval + 1;
243 }
244 if (strcmp(opt, "bg") == 0) {
245 opflags |= BGRND;
246 pass_flag_to_nmount=0;
247 } else if (strcmp(opt, "fg") == 0) {
248 /* same as not specifying -o bg */
249 pass_flag_to_nmount=0;
250 } else if (strcmp(opt, "gssname") == 0) {
251 pass_flag_to_nmount = 0;
252 gssname = val;
253 } else if (strcmp(opt, "mntudp") == 0) {
254 mnttcp_ok = 0;
255 nfsproto = IPPROTO_UDP;
256 } else if (strcmp(opt, "udp") == 0) {
257 nfsproto = IPPROTO_UDP;
258 } else if (strcmp(opt, "tcp") == 0) {
259 nfsproto = IPPROTO_TCP;
260 } else if (strcmp(opt, "noinet4") == 0) {
261 pass_flag_to_nmount=0;
262 opflags |= OF_NOINET4;
263 } else if (strcmp(opt, "noinet6") == 0) {
264 pass_flag_to_nmount=0;
265 opflags |= OF_NOINET6;
266 } else if (strcmp(opt, "noconn") == 0) {
267 noconn = 1;
268 } else if (strcmp(opt, "nfsv2") == 0) {
269 pass_flag_to_nmount=0;
270 mountmode = V2;
271 } else if (strcmp(opt, "nfsv3") == 0) {
272 mountmode = V3;
273 } else if (strcmp(opt, "nfsv4") == 0) {
274 pass_flag_to_nmount=0;
275 mountmode = V4;
276 fstype = "nfs";
277 nfsproto = IPPROTO_TCP;
278 if (portspec == NULL)
279 portspec = "2049";
280 } else if (strcmp(opt, "port") == 0) {
281 pass_flag_to_nmount=0;
282 asprintf(&portspec, "%d",
283 atoi(val));
284 if (portspec == NULL)
285 err(1, "asprintf");
286 } else if (strcmp(opt, "principal") == 0) {
287 got_principal = 1;
288 } else if (strcmp(opt, "sec") == 0) {
289 /*
290 * Don't add this option to
291 * the iovec yet - we will
292 * negotiate which sec flavor
293 * to use with the remote
294 * mountd.
295 */
296 pass_flag_to_nmount=0;
297 secflavor = sec_name_to_num(val);
298 if (secflavor < 0) {
299 errx(1,
300 "illegal sec value -- %s",
301 val);
302 }
303 } else if (strcmp(opt, "retrycnt") == 0) {
304 pass_flag_to_nmount=0;
305 num = strtol(val, &p, 10);
306 if (*p || num < 0)
307 errx(1, "illegal retrycnt value -- %s", val);
308 retrycnt = num;
309 } else if (strcmp(opt, "maxgroups") == 0) {
310 num = strtol(val, &p, 10);
311 if (*p || num <= 0)
312 errx(1, "illegal maxgroups value -- %s", val);
313 //set_rpc_maxgrouplist(num);
314 }
315 if (pass_flag_to_nmount)
316 build_iovec(&iov, &iovlen, opt, val,
317 strlen(val) + 1);
318 opt = pnextopt;
319 }
320 }
321 break;
322 case 'P':
323 /* obsolete for -o noresvport now default */
324 printf("-P deprecated, use -o noresvport\n");
325 build_iovec(&iov, &iovlen, "noresvport", NULL, 0);
326 break;
327 case 'R':
328 printf("-R deprecated, use -o retrycnt=<retrycnt>\n");
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 printf("-r deprecated, use -o rsize=<rsize>\n");
336 build_iovec(&iov, &iovlen, "rsize", optarg, (size_t)-1);
337 break;
338 case 's':
339 printf("-s deprecated, use -o soft\n");
340 build_iovec(&iov, &iovlen, "soft", NULL, 0);
341 break;
342 case 'T':
343 nfsproto = IPPROTO_TCP;
344 printf("-T deprecated, use -o tcp\n");
345 break;
346 case 't':
347 printf("-t deprecated, use -o timeout=<value>\n");
348 build_iovec(&iov, &iovlen, "timeout", optarg, (size_t)-1);
349 break;
350 case 'w':
351 printf("-w deprecated, use -o wsize=<value>\n");
352 build_iovec(&iov, &iovlen, "wsize", optarg, (size_t)-1);
353 break;
354 case 'x':
355 printf("-x deprecated, use -o retrans=<value>\n");
356 build_iovec(&iov, &iovlen, "retrans", optarg, (size_t)-1);
357 break;
358 case 'U':
359 printf("-U deprecated, use -o mntudp\n");
360 mnttcp_ok = 0;
361 nfsproto = IPPROTO_UDP;
362 build_iovec(&iov, &iovlen, "mntudp", NULL, 0);
363 break;
364 default:
365 usage();
366 break;
367 }
368 argc -= optind;
369 argv += optind;
370
371 if (argc != 2) {
372 usage();
373 /* NOTREACHED */
374 }
375
376 spec = *argv++;
377 name = *argv;
378
379 if (retrycnt == -1)
380 /* The default is to keep retrying forever. */
381 retrycnt = 0;
382
383 /*
384 * If the fstye is "oldnfs", run the old NFS client unless the
385 * "nfsv4" option was specified.
386 */
387 if (strcmp(fstype, "nfs") == 0) {
388 if (modfind("nfscl") < 0) {
389 /* Not present in kernel, try loading it */
390 if (kldload("nfscl") < 0 ||
391 modfind("nfscl") < 0)
392 errx(1, "nfscl is not available");
393 }
394 }
395
396 /*
397 * Add the fqdn to the gssname, as required.
398 */
399 if (gssname != NULL) {
400 if (strchr(gssname, '@') == NULL &&
401 gethostname(hostname, MAXHOSTNAMELEN) == 0) {
402 snprintf(gssn, sizeof (gssn), "%s@%s", gssname,
403 hostname);
404 gssname = gssn;
405 }
406 build_iovec(&iov, &iovlen, "gssname", gssname,
407 strlen(gssname) + 1);
408 }
409
410 if (!getnfsargs(spec, &iov, &iovlen))
411 exit(1);
412
413 /* resolve the mountpoint with realpath(3) */
414 (void)checkpath(name, mntpath);
415
416 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
417 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
418 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
419
420 /*
421 * XXX:
422 * Backwards compatibility routines for older kernels.
423 * Remove this and fallback_mount() code when we do not need to support
424 * NFS mounts against older kernels which still need
425 * struct nfs_args to be passed in via nmount().
426 */
427 osversion = getosreldate();
428 if (osversion >= 702100) {
429 if (nmount(iov, iovlen, mntflags))
430 err(1, "%s, %s", mntpath, errmsg);
431 } else {
432 if (fallback_mount(iov, iovlen, mntflags))
433 err(1, "%s, %s", mntpath, errmsg);
434 }
435
436 exit(0);
437}
438
439static int
440findopt(struct iovec *iov, int iovlen, const char *name,
441 char **valuep, int *lenp)
442{
443 int i;
444
445 for (i = 0; i < iovlen/2; i++, iov += 2) {
446 if (strcmp(name, iov[0].iov_base) == 0) {
447 if (valuep)
448 *valuep = iov[1].iov_base;
449 if (lenp)
450 *lenp = iov[1].iov_len;
451 return (0);
452 }
453 }
454 return (ENOENT);
455}
456
457static void
458copyopt(struct iovec **newiov, int *newiovlen,
459 struct iovec *iov, int iovlen, const char *name)
460{
461 char *value;
462 int len;
463
464 if (findopt(iov, iovlen, name, &value, &len) == 0)
465 build_iovec(newiov, newiovlen, name, value, len);
466}
467
468/*
469 * XXX: This function is provided for backwards
470 * compatibility with older kernels which did not support
471 * passing NFS mount options to nmount() as individual
472 * parameters. It should be eventually be removed.
473 */
474static int
475fallback_mount(struct iovec *iov, int iovlen, int mntflags)
476{
477 struct nfs_args args = {
478 .version = NFS_ARGSVERSION,
479 .addr = NULL,
480 .addrlen = sizeof (struct sockaddr_in),
481 .sotype = SOCK_STREAM,
482 .proto = 0,
483 .fh = NULL,
484 .fhsize = 0,
485 .flags = NFSMNT_RESVPORT,
486 .wsize = NFS_WSIZE,
487 .rsize = NFS_RSIZE,
488 .readdirsize = NFS_READDIRSIZE,
489 .timeo = 10,
490 .retrans = NFS_RETRANS,
491 .maxgrouplist = NFS_MAXGRPS,
492 .readahead = NFS_DEFRAHEAD,
493 .wcommitsize = 0, /* was: NQ_DEFLEASE */
494 .deadthresh = NFS_MAXDEADTHRESH, /* was: NQ_DEADTHRESH */
495 .hostname = NULL,
496 /* args version 4 */
497 .acregmin = NFS_MINATTRTIMO,
498 .acregmax = NFS_MAXATTRTIMO,
499 .acdirmin = NFS_MINDIRATTRTIMO,
500 .acdirmax = NFS_MAXDIRATTRTIMO,
501 };
502 int ret;
503 char *opt;
504 struct iovec *newiov;
505 int newiovlen;
506
507 if (findopt(iov, iovlen, "dumbtimer", NULL, NULL) == 0)
508 args.flags |= NFSMNT_DUMBTIMR;
509 if (findopt(iov, iovlen, "noconn", NULL, NULL) == 0)
510 args.flags |= NFSMNT_NOCONN;
511 if (findopt(iov, iovlen, "conn", NULL, NULL) == 0)
512 args.flags |= NFSMNT_NOCONN;
513 if (findopt(iov, iovlen, "nolockd", NULL, NULL) == 0)
514 args.flags |= NFSMNT_NOLOCKD;
515 if (findopt(iov, iovlen, "lockd", NULL, NULL) == 0)
516 args.flags &= ~NFSMNT_NOLOCKD;
517 if (findopt(iov, iovlen, "intr", NULL, NULL) == 0)
518 args.flags |= NFSMNT_INT;
519 if (findopt(iov, iovlen, "rdirplus", NULL, NULL) == 0)
520 args.flags |= NFSMNT_RDIRPLUS;
521 if (findopt(iov, iovlen, "resvport", NULL, NULL) == 0)
522 args.flags |= NFSMNT_RESVPORT;
523 if (findopt(iov, iovlen, "noresvport", NULL, NULL) == 0)
524 args.flags &= ~NFSMNT_RESVPORT;
525 if (findopt(iov, iovlen, "soft", NULL, NULL) == 0)
526 args.flags |= NFSMNT_SOFT;
527 if (findopt(iov, iovlen, "hard", NULL, NULL) == 0)
528 args.flags &= ~NFSMNT_SOFT;
529 if (findopt(iov, iovlen, "mntudp", NULL, NULL) == 0)
530 args.sotype = SOCK_DGRAM;
531 if (findopt(iov, iovlen, "udp", NULL, NULL) == 0)
532 args.sotype = SOCK_DGRAM;
533 if (findopt(iov, iovlen, "tcp", NULL, NULL) == 0)
534 args.sotype = SOCK_STREAM;
535 if (findopt(iov, iovlen, "nfsv3", NULL, NULL) == 0)
536 args.flags |= NFSMNT_NFSV3;
537 if (findopt(iov, iovlen, "readdirsize", &opt, NULL) == 0) {
538 if (opt == NULL) {
539 errx(1, "illegal readdirsize");
540 }
541 ret = sscanf(opt, "%d", &args.readdirsize);
542 if (ret != 1 || args.readdirsize <= 0) {
543 errx(1, "illegal readdirsize: %s", opt);
544 }
545 args.flags |= NFSMNT_READDIRSIZE;
546 }
547 if (findopt(iov, iovlen, "readahead", &opt, NULL) == 0) {
548 if (opt == NULL) {
549 errx(1, "illegal readahead");
550 }
551 ret = sscanf(opt, "%d", &args.readahead);
552 if (ret != 1 || args.readahead <= 0) {
553 errx(1, "illegal readahead: %s", opt);
554 }
555 args.flags |= NFSMNT_READAHEAD;
556 }
557 if (findopt(iov, iovlen, "wsize", &opt, NULL) == 0) {
558 if (opt == NULL) {
559 errx(1, "illegal wsize");
560 }
561 ret = sscanf(opt, "%d", &args.wsize);
562 if (ret != 1 || args.wsize <= 0) {
563 errx(1, "illegal wsize: %s", opt);
564 }
565 args.flags |= NFSMNT_WSIZE;
566 }
567 if (findopt(iov, iovlen, "rsize", &opt, NULL) == 0) {
568 if (opt == NULL) {
569 errx(1, "illegal rsize");
570 }
571 ret = sscanf(opt, "%d", &args.rsize);
572 if (ret != 1 || args.rsize <= 0) {
573 errx(1, "illegal wsize: %s", opt);
574 }
575 args.flags |= NFSMNT_RSIZE;
576 }
577 if (findopt(iov, iovlen, "retrans", &opt, NULL) == 0) {
578 if (opt == NULL) {
579 errx(1, "illegal retrans");
580 }
581 ret = sscanf(opt, "%d", &args.retrans);
582 if (ret != 1 || args.retrans <= 0) {
583 errx(1, "illegal retrans: %s", opt);
584 }
585 args.flags |= NFSMNT_RETRANS;
586 }
587 if (findopt(iov, iovlen, "acregmin", &opt, NULL) == 0) {
588 ret = sscanf(opt, "%d", &args.acregmin);
589 if (ret != 1 || args.acregmin < 0) {
590 errx(1, "illegal acregmin: %s", opt);
591 }
592 args.flags |= NFSMNT_ACREGMIN;
593 }
594 if (findopt(iov, iovlen, "acregmax", &opt, NULL) == 0) {
595 ret = sscanf(opt, "%d", &args.acregmax);
596 if (ret != 1 || args.acregmax < 0) {
597 errx(1, "illegal acregmax: %s", opt);
598 }
599 args.flags |= NFSMNT_ACREGMAX;
600 }
601 if (findopt(iov, iovlen, "acdirmin", &opt, NULL) == 0) {
602 ret = sscanf(opt, "%d", &args.acdirmin);
603 if (ret != 1 || args.acdirmin < 0) {
604 errx(1, "illegal acdirmin: %s", opt);
605 }
606 args.flags |= NFSMNT_ACDIRMIN;
607 }
608 if (findopt(iov, iovlen, "acdirmax", &opt, NULL) == 0) {
609 ret = sscanf(opt, "%d", &args.acdirmax);
610 if (ret != 1 || args.acdirmax < 0) {
611 errx(1, "illegal acdirmax: %s", opt);
612 }
613 args.flags |= NFSMNT_ACDIRMAX;
614 }
615 if (findopt(iov, iovlen, "deadthresh", &opt, NULL) == 0) {
616 ret = sscanf(opt, "%d", &args.deadthresh);
617 if (ret != 1 || args.deadthresh <= 0) {
618 errx(1, "illegal deadthresh: %s", opt);
619 }
620 args.flags |= NFSMNT_DEADTHRESH;
621 }
622 if (findopt(iov, iovlen, "timeout", &opt, NULL) == 0) {
623 ret = sscanf(opt, "%d", &args.timeo);
624 if (ret != 1 || args.timeo <= 0) {
625 errx(1, "illegal timeout: %s", opt);
626 }
627 args.flags |= NFSMNT_TIMEO;
628 }
629 if (findopt(iov, iovlen, "maxgroups", &opt, NULL) == 0) {
630 ret = sscanf(opt, "%d", &args.maxgrouplist);
631 if (ret != 1 || args.timeo <= 0) {
632 errx(1, "illegal maxgroups: %s", opt);
633 }
634 args.flags |= NFSMNT_MAXGRPS;
635 }
636 if (findopt(iov, iovlen, "addr", &opt,
637 &args.addrlen) == 0) {
638 args.addr = (struct sockaddr *) opt;
639 }
640 if (findopt(iov, iovlen, "fh", &opt, &args.fhsize) == 0) {
641 args.fh = opt;
642 }
643 if (findopt(iov, iovlen, "hostname", &args.hostname,
644 NULL) == 0) {
645 }
646 if (args.hostname == NULL) {
647 errx(1, "Invalid hostname");
648 }
649
650 newiov = NULL;
651 newiovlen = 0;
652
653 build_iovec(&newiov, &newiovlen, "nfs_args", &args, sizeof(args));
654 copyopt(&newiov, &newiovlen, iov, iovlen, "fstype");
655 copyopt(&newiov, &newiovlen, iov, iovlen, "fspath");
656 copyopt(&newiov, &newiovlen, iov, iovlen, "errmsg");
657
658 return nmount(newiov, newiovlen, mntflags);
659}
660
661static int
662sec_name_to_num(char *sec)
663{
664 if (!strcmp(sec, "krb5"))
665 return (RPCSEC_GSS_KRB5);
666 if (!strcmp(sec, "krb5i"))
667 return (RPCSEC_GSS_KRB5I);
668 if (!strcmp(sec, "krb5p"))
669 return (RPCSEC_GSS_KRB5P);
670 if (!strcmp(sec, "sys"))
671 return (AUTH_SYS);
672 return (-1);
673}
674
675static char *
676sec_num_to_name(int flavor)
677{
678 switch (flavor) {
679 case RPCSEC_GSS_KRB5:
680 return ("krb5");
681 case RPCSEC_GSS_KRB5I:
682 return ("krb5i");
683 case RPCSEC_GSS_KRB5P:
684 return ("krb5p");
685 case AUTH_SYS:
686 return ("sys");
687 }
688 return (NULL);
689}
690
691static int
692getnfsargs(char *spec, struct iovec **iov, int *iovlen)
693{
694 struct addrinfo hints, *ai_nfs, *ai;
695 enum tryret ret;
696 int ecode, speclen, remoteerr, offset, have_bracket = 0;
697 char *hostp, *delimp, *errstr;
698 size_t len;
699 static char nam[MNAMELEN + 1], pname[MAXHOSTNAMELEN + 5];
700
701 if (*spec == '[' && (delimp = strchr(spec + 1, ']')) != NULL &&
702 *(delimp + 1) == ':') {
703 hostp = spec + 1;
704 spec = delimp + 2;
705 have_bracket = 1;
706 } else if ((delimp = strrchr(spec, ':')) != NULL) {
707 hostp = spec;
708 spec = delimp + 1;
709 } else if ((delimp = strrchr(spec, '@')) != NULL) {
710 warnx("path@server syntax is deprecated, use server:path");
711 hostp = delimp + 1;
712 } else {
713 warnx("no <host>:<dirpath> nfs-name");
714 return (0);
715 }
716 *delimp = '\0';
717
718 /*
719 * If there has been a trailing slash at mounttime it seems
720 * that some mountd implementations fail to remove the mount
721 * entries from their mountlist while unmounting.
722 */
723 for (speclen = strlen(spec);
724 speclen > 1 && spec[speclen - 1] == '/';
725 speclen--)
726 spec[speclen - 1] = '\0';
727 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
728 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
729 return (0);
730 }
731 /* Make both '@' and ':' notations equal */
732 if (*hostp != '\0') {
733 len = strlen(hostp);
734 offset = 0;
735 if (have_bracket)
736 nam[offset++] = '[';
737 memmove(nam + offset, hostp, len);
738 if (have_bracket)
739 nam[len + offset++] = ']';
740 nam[len + offset++] = ':';
741 memmove(nam + len + offset, spec, speclen);
742 nam[len + speclen + offset] = '\0';
743 }
744
745 /*
746 * Handle an internet host address.
747 */
748 memset(&hints, 0, sizeof hints);
749 hints.ai_flags = AI_NUMERICHOST;
750 if (nfsproto == IPPROTO_TCP)
751 hints.ai_socktype = SOCK_STREAM;
752 else if (nfsproto == IPPROTO_UDP)
753 hints.ai_socktype = SOCK_DGRAM;
754
755 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) {
756 hints.ai_flags = AI_CANONNAME;
757 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs))
758 != 0) {
759 if (portspec == NULL)
760 errx(1, "%s: %s", hostp, gai_strerror(ecode));
761 else
762 errx(1, "%s:%s: %s", hostp, portspec,
763 gai_strerror(ecode));
764 return (0);
765 }
766
767 /*
768 * For a Kerberized nfs mount where the "principal"
769 * argument has not been set, add it here.
770 */
771 if (got_principal == 0 && secflavor >= 0 &&
772 secflavor != AUTH_SYS && ai_nfs->ai_canonname != NULL) {
773 snprintf(pname, sizeof (pname), "nfs@%s",
774 ai_nfs->ai_canonname);
775 build_iovec(iov, iovlen, "principal", pname,
776 strlen(pname) + 1);
777 }
778 }
779
780 ret = TRYRET_LOCALERR;
781 for (;;) {
782 /*
783 * Try each entry returned by getaddrinfo(). Note the
784 * occurence of remote errors by setting `remoteerr'.
785 */
786 remoteerr = 0;
787 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) {
788 if ((ai->ai_family == AF_INET6) &&
789 (opflags & OF_NOINET6))
790 continue;
791 if ((ai->ai_family == AF_INET) &&
792 (opflags & OF_NOINET4))
793 continue;
794 ret = nfs_tryproto(ai, hostp, spec, &errstr, iov,
795 iovlen);
796 if (ret == TRYRET_SUCCESS)
797 break;
798 if (ret != TRYRET_LOCALERR)
799 remoteerr = 1;
800 if ((opflags & ISBGRND) == 0)
801 fprintf(stderr, "%s\n", errstr);
802 }
803 if (ret == TRYRET_SUCCESS)
804 break;
805
806 /* Exit if all errors were local. */
807 if (!remoteerr)
808 exit(1);
809
810 /*
811 * If retrycnt == 0, we are to keep retrying forever.
812 * Otherwise decrement it, and exit if it hits zero.
813 */
814 if (retrycnt != 0 && --retrycnt == 0)
815 exit(1);
816
817 if ((opflags & (BGRND | ISBGRND)) == BGRND) {
818 warnx("Cannot immediately mount %s:%s, backgrounding",
819 hostp, spec);
820 opflags |= ISBGRND;
821 if (daemon(0, 0) != 0)
822 err(1, "daemon");
823 }
824 sleep(60);
825 }
826 freeaddrinfo(ai_nfs);
827
828 build_iovec(iov, iovlen, "hostname", nam, (size_t)-1);
829 /* Add mounted file system to PATH_MOUNTTAB */
830 if (!add_mtab(hostp, spec))
831 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
832 return (1);
833}
834
835/*
836 * Try to set up the NFS arguments according to the address
837 * family, protocol (and possibly port) specified in `ai'.
838 *
839 * Returns TRYRET_SUCCESS if successful, or:
840 * TRYRET_TIMEOUT The server did not respond.
841 * TRYRET_REMOTEERR The server reported an error.
842 * TRYRET_LOCALERR Local failure.
843 *
844 * In all error cases, *errstr will be set to a statically-allocated string
845 * describing the error.
846 */
847static enum tryret
848nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec, char **errstr,
849 struct iovec **iov, int *iovlen)
850{
851 static char errbuf[256];
852 struct sockaddr_storage nfs_ss;
853 struct netbuf nfs_nb;
854 struct nfhret nfhret;
855 struct timeval try;
856 struct rpc_err rpcerr;
857 CLIENT *clp;
858 struct netconfig *nconf, *nconf_mnt;
859 const char *netid, *netid_mnt;
860 char *secname;
861 int doconnect, nfsvers, mntvers, sotype;
862 enum clnt_stat stat;
863 enum mountmode trymntmode;
864
865 sotype = 0;
866 trymntmode = mountmode;
867 errbuf[0] = '\0';
868 *errstr = errbuf;
869
870 if (nfsproto == IPPROTO_TCP)
871 sotype = SOCK_STREAM;
872 else if (nfsproto == IPPROTO_UDP)
873 sotype = SOCK_DGRAM;
874
875 if ((netid = netidbytype(ai->ai_family, sotype)) == NULL) {
876 snprintf(errbuf, sizeof errbuf,
877 "af %d sotype %d not supported", ai->ai_family, sotype);
878 return (TRYRET_LOCALERR);
879 }
880 if ((nconf = getnetconf_cached(netid)) == NULL) {
881 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror());
882 return (TRYRET_LOCALERR);
883 }
884 /* The RPCPROG_MNT netid may be different. */
885 if (mnttcp_ok) {
886 netid_mnt = netid;
887 nconf_mnt = nconf;
888 } else {
889 if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM))
890 == NULL) {
891 snprintf(errbuf, sizeof errbuf,
892 "af %d sotype SOCK_DGRAM not supported",
893 ai->ai_family);
894 return (TRYRET_LOCALERR);
895 }
896 if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) {
897 snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt,
898 nc_sperror());
899 return (TRYRET_LOCALERR);
900 }
901 }
902
903tryagain:
904 if (trymntmode == V4) {
905 nfsvers = 4;
906 } else if (trymntmode == V2) {
907 nfsvers = 2;
908 mntvers = 1;
909 } else {
910 nfsvers = 3;
911 mntvers = 3;
912 }
913
914 if (portspec != NULL) {
915 /* `ai' contains the complete nfsd sockaddr. */
916 nfs_nb.buf = ai->ai_addr;
917 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen;
918 } else {
919 /* Ask the remote rpcbind. */
920 nfs_nb.buf = &nfs_ss;
921 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss;
922
923 if (!rpcb_getaddr(NFS_PROGRAM, nfsvers, nconf, &nfs_nb,
924 hostp)) {
925 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH &&
926 trymntmode == ANY) {
927 trymntmode = V2;
928 goto tryagain;
929 }
930 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s",
931 netid, hostp, spec,
932 clnt_spcreateerror("RPCPROG_NFS"));
933 return (returncode(rpc_createerr.cf_stat,
934 &rpc_createerr.cf_error));
935 }
936 }
937
938 /* Check that the server (nfsd) responds on the port we have chosen. */
939 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, NFS_PROGRAM, nfsvers,
940 0, 0);
941 if (clp == NULL) {
942 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
943 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS"));
944 return (returncode(rpc_createerr.cf_stat,
945 &rpc_createerr.cf_error));
946 }
947 if (sotype == SOCK_DGRAM && noconn == 0) {
948 /*
949 * Use connect(), to match what the kernel does. This
950 * catches cases where the server responds from the
951 * wrong source address.
952 */
953 doconnect = 1;
954 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) {
955 clnt_destroy(clp);
956 snprintf(errbuf, sizeof errbuf,
957 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp,
958 spec);
959 return (TRYRET_LOCALERR);
960 }
961 }
962
963 try.tv_sec = 10;
964 try.tv_usec = 0;
965 stat = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL,
966 (xdrproc_t)xdr_void, NULL, try);
967 if (stat != RPC_SUCCESS) {
968 if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
969 clnt_destroy(clp);
970 trymntmode = V2;
971 goto tryagain;
972 }
973 clnt_geterr(clp, &rpcerr);
974 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
975 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL"));
976 clnt_destroy(clp);
977 return (returncode(stat, &rpcerr));
978 }
979 clnt_destroy(clp);
980
981 /*
982 * For NFSv4, there is no mount protocol.
983 */
984 if (trymntmode == V4) {
985 /*
986 * Store the server address in nfsargsp, making
987 * sure to copy any locally allocated structures.
988 */
989 addrlen = nfs_nb.len;
990 addr = malloc(addrlen);
991 if (addr == NULL)
992 err(1, "malloc");
993 bcopy(nfs_nb.buf, addr, addrlen);
994
995 build_iovec(iov, iovlen, "addr", addr, addrlen);
996 secname = sec_num_to_name(secflavor);
997 if (secname != NULL)
998 build_iovec(iov, iovlen, "sec", secname, (size_t)-1);
999 build_iovec(iov, iovlen, "nfsv4", NULL, 0);
1000 build_iovec(iov, iovlen, "dirpath", spec, (size_t)-1);
1001
1002 return (TRYRET_SUCCESS);
1003 }
1004
1005 /* Send the MOUNTPROC_MNT RPC to get the root filehandle. */
1006 try.tv_sec = 10;
1007 try.tv_usec = 0;
1008 clp = clnt_tp_create(hostp, MOUNTPROG, mntvers, nconf_mnt);
1009 if (clp == NULL) {
1010 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
1011 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create"));
1012 return (returncode(rpc_createerr.cf_stat,
1013 &rpc_createerr.cf_error));
1014 }
1015 clp->cl_auth = authsys_create_default();
1016 nfhret.auth = secflavor;
1017 nfhret.vers = mntvers;
1018 stat = clnt_call(clp, MOUNTPROC_MNT, (xdrproc_t)xdr_dir, spec,
1019 (xdrproc_t)xdr_fh, &nfhret,
1020 try);
1021 auth_destroy(clp->cl_auth);
1022 if (stat != RPC_SUCCESS) {
1023 if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
1024 clnt_destroy(clp);
1025 trymntmode = V2;
1026 goto tryagain;
1027 }
1028 clnt_geterr(clp, &rpcerr);
1029 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
1030 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT"));
1031 clnt_destroy(clp);
1032 return (returncode(stat, &rpcerr));
1033 }
1034 clnt_destroy(clp);
1035
1036 if (nfhret.stat != 0) {
1037 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
1038 hostp, spec, strerror(nfhret.stat));
1039 return (TRYRET_REMOTEERR);
1040 }
1041
1042 /*
1043 * Store the filehandle and server address in nfsargsp, making
1044 * sure to copy any locally allocated structures.
1045 */
1046 addrlen = nfs_nb.len;
1047 addr = malloc(addrlen);
1048 fhsize = nfhret.fhsize;
1049 fh = malloc(fhsize);
1050 if (addr == NULL || fh == NULL)
1051 err(1, "malloc");
1052 bcopy(nfs_nb.buf, addr, addrlen);
1053 bcopy(nfhret.nfh, fh, fhsize);
1054
1055 build_iovec(iov, iovlen, "addr", addr, addrlen);
1056 build_iovec(iov, iovlen, "fh", fh, fhsize);
1057 secname = sec_num_to_name(nfhret.auth);
1058 if (secname)
1059 build_iovec(iov, iovlen, "sec", secname, (size_t)-1);
1060 if (nfsvers == 3)
1061 build_iovec(iov, iovlen, "nfsv3", NULL, 0);
1062
1063 return (TRYRET_SUCCESS);
1064}
1065
1066/*
1067 * Catagorise a RPC return status and error into an `enum tryret'
1068 * return code.
1069 */
1070static enum tryret
1071returncode(enum clnt_stat stat, struct rpc_err *rpcerr)
1072{
1073 switch (stat) {
1074 case RPC_TIMEDOUT:
1075 return (TRYRET_TIMEOUT);
1076 case RPC_PMAPFAILURE:
1077 case RPC_PROGNOTREGISTERED:
1078 case RPC_PROGVERSMISMATCH:
1079 /* XXX, these can be local or remote. */
1080 case RPC_CANTSEND:
1081 case RPC_CANTRECV:
1082 return (TRYRET_REMOTEERR);
1083 case RPC_SYSTEMERROR:
1084 switch (rpcerr->re_errno) {
1085 case ETIMEDOUT:
1086 return (TRYRET_TIMEOUT);
1087 case ENOMEM:
1088 break;
1089 default:
1090 return (TRYRET_REMOTEERR);
1091 }
1092 /* FALLTHROUGH */
1093 default:
1094 break;
1095 }
1096 return (TRYRET_LOCALERR);
1097}
1098
1099/*
1100 * Look up a netid based on an address family and socket type.
1101 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM.
1102 *
1103 * XXX there should be a library function for this.
1104 */
1105static const char *
1106netidbytype(int af, int sotype)
1107{
1108 struct nc_protos *p;
1109
1110 for (p = nc_protos; p->netid != NULL; p++) {
1111 if (af != p->af || sotype != p->sotype)
1112 continue;
1113 return (p->netid);
1114 }
1115 return (NULL);
1116}
1117
1118/*
1119 * Look up a netconfig entry based on a netid, and cache the result so
1120 * that we don't need to remember to call freenetconfigent().
1121 *
1122 * Otherwise it behaves just like getnetconfigent(), so nc_*error()
1123 * work on failure.
1124 */
1125static struct netconfig *
1126getnetconf_cached(const char *netid)
1127{
1128 static struct nc_entry {
1129 struct netconfig *nconf;
1130 struct nc_entry *next;
1131 } *head;
1132 struct nc_entry *p;
1133 struct netconfig *nconf;
1134
1135 for (p = head; p != NULL; p = p->next)
1136 if (strcmp(netid, p->nconf->nc_netid) == 0)
1137 return (p->nconf);
1138
1139 if ((nconf = getnetconfigent(netid)) == NULL)
1140 return (NULL);
1141 if ((p = malloc(sizeof(*p))) == NULL)
1142 err(1, "malloc");
1143 p->nconf = nconf;
1144 p->next = head;
1145 head = p;
1146
1147 return (p->nconf);
1148}
1149
1150/*
1151 * xdr routines for mount rpc's
1152 */
1153static int
1154xdr_dir(XDR *xdrsp, char *dirp)
1155{
1156 return (xdr_string(xdrsp, &dirp, MNTPATHLEN));
1157}
1158
1159static int
1160xdr_fh(XDR *xdrsp, struct nfhret *np)
1161{
1162 int i;
1163 long auth, authcnt, authfnd = 0;
1164
1165 if (!xdr_u_long(xdrsp, &np->stat))
1166 return (0);
1167 if (np->stat)
1168 return (1);
1169 switch (np->vers) {
1170 case 1:
1171 np->fhsize = NFS_FHSIZE;
1172 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFS_FHSIZE));
1173 case 3:
1174 if (!xdr_long(xdrsp, &np->fhsize))
1175 return (0);
1176 if (np->fhsize <= 0 || np->fhsize > NFS3_FHSIZE)
1177 return (0);
1178 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
1179 return (0);
1180 if (!xdr_long(xdrsp, &authcnt))
1181 return (0);
1182 for (i = 0; i < authcnt; i++) {
1183 if (!xdr_long(xdrsp, &auth))
1184 return (0);
1185 if (np->auth == -1) {
1186 np->auth = auth;
1187 authfnd++;
1188 } else if (auth == np->auth) {
1189 authfnd++;
1190 }
1191 }
1192 /*
1193 * Some servers, such as DEC's OSF/1 return a nil authenticator
1194 * list to indicate RPCAUTH_UNIX.
1195 */
1196 if (authcnt == 0 && np->auth == -1)
1197 np->auth = AUTH_SYS;
1198 if (!authfnd && (authcnt > 0 || np->auth != AUTH_SYS))
1199 np->stat = EAUTH;
1200 return (1);
1201 };
1202 return (0);
1203}
1204
1205static void
1206usage(void)
1207{
1208 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
1209"usage: mount_nfs [-23bcdiLlNPsTU] [-a maxreadahead] [-D deadthresh]",
1210" [-g maxgroups] [-I readdirsize] [-o options] [-R retrycnt]",
1211" [-r readsize] [-t timeout] [-w writesize] [-x retrans]",
1212" rhost:path node");
1213 exit(1);
1214}