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 * 3. 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 * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California. All rights reserved.
33 * @(#)mount_nfs.c 8.11 (Berkeley) 5/4/95
34 * $FreeBSD: src/sbin/mount_nfs/mount_nfs.c,v 1.36.2.6 2003/05/13 14:45:40 trhodes Exp $
35 */
36
37 #include <sys/param.h>
38 #include <sys/mount.h>
39 #include <sys/socket.h>
40 #include <sys/stat.h>
41 #include <sys/syslog.h>
42
43 #include <rpc/rpc.h>
44 #include <rpc/pmap_clnt.h>
45 #include <rpc/pmap_prot.h>
46
47 #include <vfs/nfs/rpcv2.h>
48 #include <vfs/nfs/nfsproto.h>
49 #include <vfs/nfs/nfs.h>
50
51 #include <arpa/inet.h>
52
53 #include <ctype.h>
54 #include <err.h>
55 #include <errno.h>
56 #include <fcntl.h>
57 #include <mntopts.h>
58 #include <netdb.h>
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include <string.h>
62 #include <sysexits.h>
63 #include <unistd.h>
64
65 #include "mounttab.h"
66
67 #define ALTF_BG 0x1
68 #define ALTF_NOCONN 0x2
69 #define ALTF_DUMBTIMR 0x4
70 #define ALTF_INTR 0x8
71 /* 0x10 was for ALTF_KERB */
72 #define ALTF_NFSV3 0x20
73 #define ALTF_RDIRPLUS 0x40
74 #define ALTF_CACHE 0x80
75 #define ALTF_RESVPORT 0x100
76 #define ALTF_SEQPACKET 0x200
77 #define ALTF_UNUSED400 0x400
78 #define ALTF_SOFT 0x800
79 #define ALTF_TCP 0x1000
80 #define ALTF_PORT 0x2000
81 #define ALTF_NFSV2 0x4000
82 #define ALTF_ACREGMIN 0x8000
83 #define ALTF_ACREGMAX 0x10000
84 #define ALTF_ACDIRMIN 0x20000
85 #define ALTF_ACDIRMAX 0x40000
86 #define ALTF_RETRYCNT 0x80000
87
88 struct mntopt mopts[] = {
89 MOPT_STDOPTS,
90 MOPT_FORCE,
91 MOPT_UPDATE,
92 MOPT_ASYNC,
93 { "bg", 0, ALTF_BG, 1 },
94 { "conn", 1, ALTF_NOCONN, 1 },
95 { "dumbtimer", 0, ALTF_DUMBTIMR, 1 },
96 { "intr", 0, ALTF_INTR, 1 },
97 { "nfsv3", 0, ALTF_NFSV3, 1 },
98 { "rdirplus", 0, ALTF_RDIRPLUS, 1 },
99 { "mntudp", 1, ALTF_TCP, 1 },
100 { "resvport", 0, ALTF_RESVPORT, 1 },
101 { "soft", 0, ALTF_SOFT, 1 },
102 { "tcp", 0, ALTF_TCP, 1 },
103 { "udp", 1, ALTF_TCP, 1 },
104 { "port=", 0, ALTF_PORT, 1 },
105 { "nfsv2", 0, ALTF_NFSV2, 1 },
106 { "acregmin=", 0, ALTF_ACREGMIN, 1 },
107 { "acregmax=", 0, ALTF_ACREGMAX, 1 },
108 { "acdirmin=", 0, ALTF_ACDIRMIN, 1 },
109 { "acdirmax=", 0, ALTF_ACDIRMAX, 1 },
110 { "cache", 0, ALTF_CACHE, 1 },
111 { "retrycnt=", 0, ALTF_RETRYCNT, 1 },
112 MOPT_NULL
113 };
114
115 struct nfs_args nfsdefargs = {
116 NFS_ARGSVERSION,
117 NULL,
118 sizeof (struct sockaddr_in),
119 0,
120 0,
121 NULL,
122 0,
123 NFSMNT_RESVPORT,
124 NFS_WSIZE,
125 NFS_RSIZE,
126 NFS_READDIRSIZE,
127 10,
128 NFS_RETRANS,
129 NFS_MAXGRPS,
130 NFS_DEFRAHEAD,
131 0,
132 NFS_DEADTHRESH,
133 NULL,
134 /* args version 4 */
135 NFS_MINATTRTIMO,
136 NFS_MAXATTRTIMO,
137 NFS_MINDIRATTRTIMO,
138 NFS_MAXDIRATTRTIMO,
139 };
140
141 /* Table for af,sotype -> netid conversions. */
142 struct nc_protos {
143 const char *netid;
144 int af;
145 int sotype;
146 } nc_protos[] = {
147 {"udp", AF_INET, SOCK_DGRAM},
148 {"tcp", AF_INET, SOCK_STREAM},
149 {"udp6", AF_INET6, SOCK_DGRAM},
150 {"tcp6", AF_INET6, SOCK_STREAM},
151 {NULL, 0, 0}
152 };
153
154 struct nfhret {
155 u_long stat;
156 long vers;
157 long auth;
158 long fhsize;
159 u_char nfh[NFSX_V3FHMAX];
160 };
161 #define BGRND 1
162 #define ISBGRND 2
163 int retrycnt = -1;
164 int opflags = 0;
165 int nfsproto;
166 char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */
167 enum mountmode {
168 ANY,
169 V2,
170 V3
171 } mountmode = ANY;
172
173 /* Return codes for nfs_tryproto. */
174 enum tryret {
175 TRYRET_SUCCESS,
176 TRYRET_TIMEOUT, /* No response received. */
177 TRYRET_REMOTEERR, /* Error received from remote server. */
178 TRYRET_LOCALERR /* Local failure. */
179 };
180
181 #if 0
182 void set_rpc_maxgrouplist(int);
183 #endif
184 static struct netconfig *getnetconf_cached(const char *);
185 static const char *netidbytype(int, int);
186 static int getnfsargs(char *, struct nfs_args *);
187 static void usage(void) __dead2;
188 static int xdr_dir(XDR *, char *);
189 static int xdr_fh(XDR *, struct nfhret *);
190 static enum tryret
191 nfs_tryproto(struct nfs_args *, struct addrinfo *,
192 char *, char *, char **);
193 static enum tryret
194 returncode(enum clnt_stat, struct rpc_err *);
195
196 /*
197 * Used to set mount flags with getmntopts. Call with dir=TRUE to
198 * initialize altflags from the current mount flags. Call with
199 * dir=FALSE to update mount flags with the new value of altflags after
200 * the call to getmntopts.
201 */
202 static void
set_flags(int * altflags,int * nfsflags,int dir)203 set_flags(int* altflags, int* nfsflags, int dir)
204 {
205 #define F2(af, nf) \
206 if (dir) { \
207 if (*nfsflags & NFSMNT_##nf) \
208 *altflags |= ALTF_##af; \
209 else \
210 *altflags &= ~ALTF_##af; \
211 } else { \
212 if (*altflags & ALTF_##af) \
213 *nfsflags |= NFSMNT_##nf; \
214 else \
215 *nfsflags &= ~NFSMNT_##nf; \
216 }
217 #define F(f) F2(f,f)
218
219 F(NOCONN);
220 F(DUMBTIMR);
221 F2(INTR, INT);
222 F(RDIRPLUS);
223 F(RESVPORT);
224 F(SOFT);
225 F(ACREGMIN);
226 F(ACREGMAX);
227 F(ACDIRMIN);
228 F(ACDIRMAX);
229 #ifdef NFSMNT_CACHE
230 F(CACHE);
231 #endif
232 F(RETRYCNT);
233
234 #undef F
235 #undef F2
236 }
237
238 int
main(int argc,char ** argv)239 main(int argc, char **argv)
240 {
241 int c;
242 struct nfs_args *nfsargsp;
243 struct nfs_args nfsargs;
244 int mntflags, altflags, num;
245 char *name, *p, *spec;
246 char mntpath[MAXPATHLEN];
247 struct vfsconf vfc;
248 int error = 0;
249
250 mntflags = 0;
251 altflags = ALTF_TCP | ALTF_RDIRPLUS;
252 nfsargs = nfsdefargs;
253 nfsargsp = &nfsargs;
254 if (altflags & ALTF_TCP) {
255 nfsproto = IPPROTO_TCP;
256 nfsargsp->sotype = SOCK_STREAM;
257 } else {
258 nfsproto = IPPROTO_UDP;
259 nfsargsp->sotype = SOCK_DGRAM;
260 }
261 while ((c = getopt(argc, argv,
262 "23a:bcdD:g:I:ilNo:PR:r:sTt:w:x:U")) != -1)
263 switch (c) {
264 case '2':
265 mountmode = V2;
266 break;
267 case '3':
268 mountmode = V3;
269 break;
270 case 'a':
271 num = strtol(optarg, &p, 10);
272 if (*p || num < 0)
273 errx(1, "illegal -a value -- %s", optarg);
274 nfsargsp->readahead = num;
275 nfsargsp->flags |= NFSMNT_READAHEAD;
276 break;
277 case 'b':
278 opflags |= BGRND;
279 break;
280 case 'c':
281 nfsargsp->flags |= NFSMNT_NOCONN;
282 break;
283 case 'D':
284 num = strtol(optarg, &p, 10);
285 if (*p || num <= 0)
286 errx(1, "illegal -D value -- %s", optarg);
287 nfsargsp->deadthresh = num;
288 nfsargsp->flags |= NFSMNT_DEADTHRESH;
289 break;
290 case 'd':
291 nfsargsp->flags |= NFSMNT_DUMBTIMR;
292 break;
293 #if 0 /* XXXX */
294 case 'g':
295 num = strtol(optarg, &p, 10);
296 if (*p || num <= 0)
297 errx(1, "illegal -g value -- %s", optarg);
298 set_rpc_maxgrouplist(num);
299 nfsargsp->maxgrouplist = num;
300 nfsargsp->flags |= NFSMNT_MAXGRPS;
301 break;
302 #endif
303 case 'I':
304 num = strtol(optarg, &p, 10);
305 if (*p || num <= 0)
306 errx(1, "illegal -I value -- %s", optarg);
307 nfsargsp->readdirsize = num;
308 nfsargsp->flags |= NFSMNT_READDIRSIZE;
309 break;
310 case 'i':
311 nfsargsp->flags |= NFSMNT_INT;
312 break;
313 case 'l':
314 nfsargsp->flags |= NFSMNT_RDIRPLUS;
315 break;
316 case 'N':
317 nfsargsp->flags &= ~NFSMNT_RESVPORT;
318 break;
319 case 'o':
320 set_flags(&altflags, &nfsargsp->flags, TRUE);
321 altflags |= ALTF_RDIRPLUS;
322 if (nfsproto == IPPROTO_TCP)
323 altflags |= ALTF_TCP;
324 if (mountmode == V2)
325 altflags |= ALTF_NFSV2;
326 else if (mountmode == V3)
327 altflags |= ALTF_NFSV3;
328 getmntopts(optarg, mopts, &mntflags, &altflags);
329 set_flags(&altflags, &nfsargsp->flags, FALSE);
330 /*
331 * Handle altflags which don't map directly to
332 * mount flags.
333 */
334 if(altflags & ALTF_BG)
335 opflags |= BGRND;
336 if (altflags & ALTF_TCP) {
337 nfsproto = IPPROTO_TCP;
338 nfsargsp->sotype = SOCK_STREAM;
339 } else {
340 nfsproto = IPPROTO_UDP;
341 nfsargsp->sotype = SOCK_DGRAM;
342 }
343 if(altflags & ALTF_PORT) {
344 /*
345 * XXX Converting from a string to an int
346 * and back again is silly, and we should
347 * allow /etc/services names.
348 */
349 asprintf(&portspec, "%d",
350 atoi(strstr(optarg, "port=") + 5));
351 if (portspec == NULL)
352 err(1, "asprintf");
353 }
354 mountmode = ANY;
355 if(altflags & ALTF_NFSV2)
356 mountmode = V2;
357 if(altflags & ALTF_NFSV3)
358 mountmode = V3;
359 if(altflags & ALTF_ACREGMIN)
360 nfsargsp->acregmin = atoi(strstr(optarg,
361 "acregmin=") + 9);
362 if(altflags & ALTF_ACREGMAX)
363 nfsargsp->acregmax = atoi(strstr(optarg,
364 "acregmax=") + 9);
365 if(altflags & ALTF_ACDIRMIN)
366 nfsargsp->acdirmin = atoi(strstr(optarg,
367 "acdirmin=") + 9);
368 if(altflags & ALTF_ACDIRMAX)
369 nfsargsp->acdirmax = atoi(strstr(optarg,
370 "acdirmax=") + 9);
371 if(altflags & ALTF_RETRYCNT) {
372 num = atoi(strstr(optarg, "retrycnt=") + 9);
373 if (num < 0)
374 errx(1, "illegal -o retrycnt value -- %s", optarg);
375 retrycnt = num;
376 }
377 break;
378 case 'P':
379 /* obsolete for NFSMNT_RESVPORT, now default */
380 break;
381 case 'R':
382 num = strtol(optarg, &p, 10);
383 if (*p || num < 0)
384 errx(1, "illegal -R value -- %s", optarg);
385 retrycnt = num;
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 nfsargsp->rsize = num;
392 nfsargsp->flags |= NFSMNT_RSIZE;
393 break;
394 case 's':
395 nfsargsp->flags |= NFSMNT_SOFT;
396 break;
397 case 'T':
398 nfsargsp->sotype = SOCK_STREAM;
399 nfsproto = IPPROTO_TCP;
400 altflags |= ALTF_TCP;
401 break;
402 case 't':
403 num = strtol(optarg, &p, 10);
404 if (*p || num <= 0)
405 errx(1, "illegal -t value -- %s", optarg);
406 nfsargsp->timeo = num;
407 nfsargsp->flags |= NFSMNT_TIMEO;
408 break;
409 case 'w':
410 num = strtol(optarg, &p, 10);
411 if (*p || num <= 0)
412 errx(1, "illegal -w value -- %s", optarg);
413 nfsargsp->wsize = num;
414 nfsargsp->flags |= NFSMNT_WSIZE;
415 break;
416 case 'x':
417 num = strtol(optarg, &p, 10);
418 if (*p || num <= 0)
419 errx(1, "illegal -x value -- %s", optarg);
420 nfsargsp->retrans = num;
421 nfsargsp->flags |= NFSMNT_RETRANS;
422 break;
423 case 'U':
424 nfsargsp->sotype = SOCK_DGRAM;
425 nfsproto = IPPROTO_UDP;
426 altflags &= ~ALTF_TCP;
427 break;
428 default:
429 usage();
430 break;
431 }
432 argc -= optind;
433 argv += optind;
434
435 if (argc != 2) {
436 usage();
437 /* NOTREACHED */
438 }
439
440 spec = *argv++;
441 name = *argv;
442
443 if (retrycnt == -1)
444 /* The default is to keep retrying forever. */
445 retrycnt = 0;
446 if (!getnfsargs(spec, nfsargsp))
447 exit(1);
448
449 /* resolve the mountpoint with realpath(3) */
450 checkpath(name, mntpath);
451
452 error = getvfsbyname("nfs", &vfc);
453 if (error && vfsisloadable("nfs")) {
454 if(vfsload("nfs"))
455 err(EX_OSERR, "vfsload(nfs)");
456 endvfsent(); /* clear cache */
457 error = getvfsbyname("nfs", &vfc);
458 }
459 if (error)
460 errx(EX_OSERR, "nfs filesystem is not available");
461
462 if (mount(vfc.vfc_name, mntpath, mntflags, nfsargsp))
463 err(1, "%s", mntpath);
464 exit(0);
465 }
466
467 static int
getnfsargs(char * spec,struct nfs_args * nfsargsp)468 getnfsargs(char *spec, struct nfs_args *nfsargsp)
469 {
470 struct addrinfo hints, *ai_nfs, *ai;
471 enum tryret ret;
472 int ecode, speclen, remoteerr;
473 char *hostp, *delimp, *errstr;
474 size_t len;
475 static char nam[MNAMELEN + 1];
476
477 if ((delimp = strrchr(spec, ':')) != NULL) {
478 hostp = spec;
479 spec = delimp + 1;
480 } else if ((delimp = strrchr(spec, '@')) != NULL) {
481 warnx("path@server syntax is deprecated, use server:path");
482 hostp = delimp + 1;
483 } else {
484 warnx("no <host>:<dirpath> nfs-name");
485 return (0);
486 }
487 *delimp = '\0';
488
489 /*
490 * If there has been a trailing slash at mounttime it seems
491 * that some mountd implementations fail to remove the mount
492 * entries from their mountlist while unmounting.
493 */
494 for (speclen = strlen(spec);
495 speclen > 1 && spec[speclen - 1] == '/';
496 speclen--)
497 spec[speclen - 1] = '\0';
498 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
499 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
500 return (0);
501 }
502 /* Make both '@' and ':' notations equal */
503 if (*hostp != '\0') {
504 len = strlen(hostp);
505 memmove(nam, hostp, len);
506 nam[len] = ':';
507 memmove(nam + len + 1, spec, speclen);
508 nam[len + speclen + 1] = '\0';
509 }
510
511 /*
512 * Handle an internet host address.
513 */
514 memset(&hints, 0, sizeof hints);
515 hints.ai_flags = AI_NUMERICHOST;
516 hints.ai_socktype = nfsargsp->sotype;
517 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) {
518 hints.ai_flags = 0;
519 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs))
520 != 0) {
521 if (portspec == NULL)
522 errx(1, "%s: %s", hostp, gai_strerror(ecode));
523 else
524 errx(1, "%s:%s: %s", hostp, portspec,
525 gai_strerror(ecode));
526 return (0);
527 }
528 }
529
530 ret = TRYRET_LOCALERR;
531 for (;;) {
532 /*
533 * Try each entry returned by getaddrinfo(). Note the
534 * occurence of remote errors by setting `remoteerr'.
535 */
536 remoteerr = 0;
537 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) {
538 ret = nfs_tryproto(nfsargsp, ai, hostp, spec, &errstr);
539 if (ret == TRYRET_SUCCESS)
540 break;
541 if (ret != TRYRET_LOCALERR)
542 remoteerr = 1;
543 if ((opflags & ISBGRND) == 0)
544 fprintf(stderr, "%s\n", errstr);
545 }
546 if (ret == TRYRET_SUCCESS)
547 break;
548
549 /* Exit if all errors were local. */
550 if (!remoteerr)
551 exit(1);
552
553 /*
554 * If retrycnt == 0, we are to keep retrying forever.
555 * Otherwise decrement it, and exit if it hits zero.
556 */
557 if (retrycnt != 0 && --retrycnt == 0)
558 exit(1);
559
560 if ((opflags & (BGRND | ISBGRND)) == BGRND) {
561 warnx("Cannot immediately mount %s:%s, backgrounding",
562 hostp, spec);
563 opflags |= ISBGRND;
564 if (daemon(0, 0) != 0)
565 err(1, "daemon");
566 }
567 sleep(60);
568 }
569 freeaddrinfo(ai_nfs);
570 nfsargsp->hostname = nam;
571 /* Add mounted filesystem to PATH_MOUNTTAB */
572 if (!add_mtab(hostp, spec))
573 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
574 return (1);
575 }
576
577 /*
578 * Try to set up the NFS arguments according to the address
579 * family, protocol (and possibly port) specified in `ai'.
580 *
581 * Returns TRYRET_SUCCESS if successful, or:
582 * TRYRET_TIMEOUT The server did not respond.
583 * TRYRET_REMOTEERR The server reported an error.
584 * TRYRET_LOCALERR Local failure.
585 *
586 * In all error cases, *errstr will be set to a statically-allocated string
587 * describing the error.
588 */
589 static enum tryret
nfs_tryproto(struct nfs_args * nfsargsp,struct addrinfo * ai,char * hostp,char * spec,char ** errstr)590 nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp,
591 char *spec, char **errstr)
592 {
593 static char errbuf[256];
594 struct sockaddr_storage nfs_ss;
595 struct netbuf nfs_nb;
596 struct nfhret nfhret;
597 struct timeval try;
598 struct rpc_err rpcerr;
599 CLIENT *clp;
600 struct netconfig *nconf, *nconf_mnt;
601 const char *netid, *netid_mnt;
602 int doconnect, nfsvers, mntvers;
603 enum clnt_stat status;
604 enum mountmode trymntmode;
605
606 trymntmode = mountmode;
607 errbuf[0] = '\0';
608 *errstr = errbuf;
609
610 if ((netid = netidbytype(ai->ai_family, nfsargsp->sotype)) == NULL) {
611 snprintf(errbuf, sizeof errbuf,
612 "af %d sotype %d not supported", ai->ai_family,
613 nfsargsp->sotype);
614 return (TRYRET_LOCALERR);
615 }
616 if ((nconf = getnetconf_cached(netid)) == NULL) {
617 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror());
618 return (TRYRET_LOCALERR);
619 }
620
621 netid_mnt = netid;
622 nconf_mnt = nconf;
623
624 tryagain:
625 if (trymntmode == V2) {
626 nfsvers = 2;
627 mntvers = 1;
628 } else {
629 nfsvers = 3;
630 mntvers = 3;
631 }
632
633 if (portspec != NULL) {
634 /* `ai' contains the complete nfsd sockaddr. */
635 nfs_nb.buf = ai->ai_addr;
636 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen;
637 } else {
638 /* Ask the remote rpcbind. */
639 nfs_nb.buf = &nfs_ss;
640 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss;
641
642 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb,
643 hostp)) {
644 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH &&
645 trymntmode == ANY) {
646 trymntmode = V2;
647 goto tryagain;
648 }
649 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s",
650 netid, hostp, spec,
651 clnt_spcreateerror("RPCPROG_NFS"));
652 return (returncode(rpc_createerr.cf_stat,
653 &rpc_createerr.cf_error));
654 }
655 }
656
657 /* Check that the server (nfsd) responds on the port we have chosen. */
658 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, RPCPROG_NFS, nfsvers,
659 0, 0);
660 if (clp == NULL) {
661 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
662 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS"));
663 return (returncode(rpc_createerr.cf_stat,
664 &rpc_createerr.cf_error));
665 }
666 if (nfsargsp->sotype == SOCK_DGRAM &&
667 !(nfsargsp->flags & NFSMNT_NOCONN)) {
668 /*
669 * Use connect(), to match what the kernel does. This
670 * catches cases where the server responds from the
671 * wrong source address.
672 */
673 doconnect = 1;
674 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) {
675 clnt_destroy(clp);
676 snprintf(errbuf, sizeof errbuf,
677 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp,
678 spec);
679 return (TRYRET_LOCALERR);
680 }
681 }
682
683 try.tv_sec = 10;
684 try.tv_usec = 0;
685 status = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL,
686 (xdrproc_t)xdr_void, NULL, try);
687 if (status != RPC_SUCCESS) {
688 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
689 clnt_destroy(clp);
690 trymntmode = V2;
691 goto tryagain;
692 }
693 clnt_geterr(clp, &rpcerr);
694 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
695 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL"));
696 clnt_destroy(clp);
697 return (returncode(status, &rpcerr));
698 }
699 clnt_destroy(clp);
700
701 /* Send the RPCMNT_MOUNT RPC to get the root filehandle. */
702 try.tv_sec = 10;
703 try.tv_usec = 0;
704 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, nconf_mnt);
705 if (clp == NULL) {
706 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
707 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create"));
708 return (returncode(rpc_createerr.cf_stat,
709 &rpc_createerr.cf_error));
710 }
711 clp->cl_auth = authsys_create_default();
712 nfhret.auth = RPCAUTH_UNIX;
713 nfhret.vers = mntvers;
714 status = clnt_call(clp, RPCMNT_MOUNT, (xdrproc_t)xdr_dir, spec,
715 (xdrproc_t)xdr_fh, &nfhret, try);
716 auth_destroy(clp->cl_auth);
717 if (status != RPC_SUCCESS) {
718 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
719 clnt_destroy(clp);
720 trymntmode = V2;
721 goto tryagain;
722 }
723 clnt_geterr(clp, &rpcerr);
724 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
725 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT"));
726 clnt_destroy(clp);
727 return (returncode(status, &rpcerr));
728 }
729 clnt_destroy(clp);
730
731 if (nfhret.stat != 0) {
732 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
733 hostp, spec, strerror(nfhret.stat));
734 return (TRYRET_REMOTEERR);
735 }
736
737 /*
738 * Store the filehandle and server address in nfsargsp, making
739 * sure to copy any locally allocated structures.
740 */
741 nfsargsp->addrlen = nfs_nb.len;
742 nfsargsp->addr = malloc(nfsargsp->addrlen);
743 nfsargsp->fhsize = nfhret.fhsize;
744 nfsargsp->fh = malloc(nfsargsp->fhsize);
745 if (nfsargsp->addr == NULL || nfsargsp->fh == NULL)
746 err(1, "malloc");
747 bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen);
748 bcopy(nfhret.nfh, nfsargsp->fh, nfsargsp->fhsize);
749
750 if (nfsvers == 3)
751 nfsargsp->flags |= NFSMNT_NFSV3;
752 else
753 nfsargsp->flags &= ~NFSMNT_NFSV3;
754
755 return (TRYRET_SUCCESS);
756 }
757
758
759 /*
760 * Catagorise a RPC return status and error into an `enum tryret'
761 * return code.
762 */
763 static enum tryret
returncode(enum clnt_stat status,struct rpc_err * rpcerr)764 returncode(enum clnt_stat status, struct rpc_err *rpcerr)
765 {
766 switch (status) {
767 case RPC_TIMEDOUT:
768 return (TRYRET_TIMEOUT);
769 case RPC_PMAPFAILURE:
770 case RPC_PROGNOTREGISTERED:
771 case RPC_PROGVERSMISMATCH:
772 /* XXX, these can be local or remote. */
773 case RPC_CANTSEND:
774 case RPC_CANTRECV:
775 return (TRYRET_REMOTEERR);
776 case RPC_SYSTEMERROR:
777 switch (rpcerr->re_errno) {
778 case ETIMEDOUT:
779 return (TRYRET_TIMEOUT);
780 case ENOMEM:
781 break;
782 default:
783 return (TRYRET_REMOTEERR);
784 }
785 /* FALLTHROUGH */
786 default:
787 break;
788 }
789 return (TRYRET_LOCALERR);
790 }
791
792 /*
793 * Look up a netid based on an address family and socket type.
794 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM.
795 *
796 * XXX there should be a library function for this.
797 */
798 static const char *
netidbytype(int af,int sotype)799 netidbytype(int af, int sotype)
800 {
801 struct nc_protos *p;
802
803 for (p = nc_protos; p->netid != NULL; p++) {
804 if (af != p->af || sotype != p->sotype)
805 continue;
806 return (p->netid);
807 }
808 return (NULL);
809 }
810
811 /*
812 * Look up a netconfig entry based on a netid, and cache the result so
813 * that we don't need to remember to call freenetconfigent().
814 *
815 * Otherwise it behaves just like getnetconfigent(), so nc_*error()
816 * work on failure.
817 */
818 static struct netconfig *
getnetconf_cached(const char * netid)819 getnetconf_cached(const char *netid)
820 {
821 static struct nc_entry {
822 struct netconfig *nconf;
823 struct nc_entry *next;
824 } *head;
825 struct nc_entry *p;
826 struct netconfig *nconf;
827
828 for (p = head; p != NULL; p = p->next)
829 if (strcmp(netid, p->nconf->nc_netid) == 0)
830 return (p->nconf);
831
832 if ((nconf = getnetconfigent(netid)) == NULL)
833 return (NULL);
834 if ((p = malloc(sizeof(*p))) == NULL)
835 err(1, "malloc");
836 p->nconf = nconf;
837 p->next = head;
838 head = p;
839
840 return (p->nconf);
841 }
842
843 /*
844 * xdr routines for mount rpc's
845 */
846 static int
xdr_dir(XDR * xdrsp,char * dirp)847 xdr_dir(XDR *xdrsp, char *dirp)
848 {
849 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
850 }
851
852 static int
xdr_fh(XDR * xdrsp,struct nfhret * np)853 xdr_fh(XDR *xdrsp, struct nfhret *np)
854 {
855 int i;
856 long auth, authcnt, authfnd = 0;
857
858 if (!xdr_u_long(xdrsp, &np->stat))
859 return (0);
860 if (np->stat)
861 return (1);
862 switch (np->vers) {
863 case 1:
864 np->fhsize = NFSX_V2FH;
865 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
866 case 3:
867 if (!xdr_long(xdrsp, &np->fhsize))
868 return (0);
869 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
870 return (0);
871 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
872 return (0);
873 if (!xdr_long(xdrsp, &authcnt))
874 return (0);
875 for (i = 0; i < authcnt; i++) {
876 if (!xdr_long(xdrsp, &auth))
877 return (0);
878 if (auth == np->auth)
879 authfnd++;
880 }
881 /*
882 * Some servers, such as DEC's OSF/1 return a nil authenticator
883 * list to indicate RPCAUTH_UNIX.
884 */
885 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
886 np->stat = EAUTH;
887 return (1);
888 }
889 return (0);
890 }
891
892 static void
usage(void)893 usage(void)
894 {
895 fprintf(stderr, "%s\n%s\n%s\n%s\n",
896 "usage: mount_nfs [-23NPTUbcdils] [-D deadthresh] [-I readdirsize]",
897 " [-R retrycnt] [-a maxreadahead]",
898 " [-g maxgroups] [-o options] [-r readsize]",
899 " [-t timeout] [-w writesize] [-x retrans] rhost:path node");
900 exit(1);
901 }
902