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
35 static 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
41 static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
42 #endif /* not lint */
43 #endif
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
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. */
82 static struct 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
94 struct 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
105 static int retrycnt = -1;
106 static int opflags = 0;
107 static int nfsproto = IPPROTO_TCP;
108 static int mnttcp_ok = 1;
109 static int noconn = 0;
110 /* The 'portspec' is the server nfs port; NULL means look up via rpcbind. */
111 static const char *portspec = NULL;
112 static struct sockaddr *addr;
113 static int addrlen = 0;
114 static u_char *fh = NULL;
115 static int fhsize = 0;
116 static int secflavor = -1;
117 static int got_principal = 0;
118
119 static enum mountmode {
120 ANY,
121 V2,
122 V3,
123 V4
124 } mountmode = ANY;
125
126 /* Return codes for nfs_tryproto. */
127 enum tryret {
128 TRYRET_SUCCESS,
129 TRYRET_TIMEOUT, /* No response received. */
130 TRYRET_REMOTEERR, /* Error received from remote server. */
131 TRYRET_LOCALERR /* Local failure. */
132 };
133
134 static int sec_name_to_num(const char *sec);
135 static const char *sec_num_to_name(int num);
136 static int getnfsargs(char *, struct iovec **iov, int *iovlen);
137 /* void set_rpc_maxgrouplist(int); */
138 static struct netconfig *getnetconf_cached(const char *netid);
139 static const char *netidbytype(int af, int sotype);
140 static void usage(void) __dead2;
141 static int xdr_dir(XDR *, char *);
142 static int xdr_fh(XDR *, struct nfhret *);
143 static enum tryret nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec,
144 char **errstr, struct iovec **iov, int *iovlen);
145 static enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr);
146
147 int
main(int argc,char * argv[])148 main(int argc, char *argv[])
149 {
150 int c;
151 struct iovec *iov;
152 int num, iovlen;
153 char *mntname, *p, *spec, *tmp;
154 char mntpath[MAXPATHLEN], errmsg[255];
155 char hostname[MAXHOSTNAMELEN + 1], gssn[MAXHOSTNAMELEN + 50];
156 const char *fstype, *gssname;
157
158 iov = NULL;
159 iovlen = 0;
160 memset(errmsg, 0, sizeof(errmsg));
161 gssname = NULL;
162
163 fstype = strrchr(argv[0], '_');
164 if (fstype == NULL)
165 errx(EX_USAGE, "argv[0] must end in _fstype");
166
167 ++fstype;
168
169 while ((c = getopt(argc, argv,
170 "23a:bcdD:g:I:iLlNo:PR:r:sTt:w:x:U")) != -1)
171 switch (c) {
172 case '2':
173 mountmode = V2;
174 break;
175 case '3':
176 mountmode = V3;
177 break;
178 case 'a':
179 printf("-a deprecated, use -o readahead=<value>\n");
180 build_iovec(&iov, &iovlen, "readahead", optarg, (size_t)-1);
181 break;
182 case 'b':
183 opflags |= BGRND;
184 break;
185 case 'c':
186 printf("-c deprecated, use -o noconn\n");
187 build_iovec(&iov, &iovlen, "noconn", NULL, 0);
188 noconn = 1;
189 break;
190 case 'D':
191 printf("-D deprecated, use -o deadthresh=<value>\n");
192 build_iovec(&iov, &iovlen, "deadthresh", optarg, (size_t)-1);
193 break;
194 case 'd':
195 printf("-d deprecated, use -o dumbtimer");
196 build_iovec(&iov, &iovlen, "dumbtimer", NULL, 0);
197 break;
198 case 'g':
199 printf("-g deprecated, use -o maxgroups");
200 num = strtol(optarg, &p, 10);
201 if (*p || num <= 0)
202 errx(1, "illegal -g value -- %s", optarg);
203 //set_rpc_maxgrouplist(num);
204 build_iovec(&iov, &iovlen, "maxgroups", optarg, (size_t)-1);
205 break;
206 case 'I':
207 printf("-I deprecated, use -o readdirsize=<value>\n");
208 build_iovec(&iov, &iovlen, "readdirsize", optarg, (size_t)-1);
209 break;
210 case 'i':
211 printf("-i deprecated, use -o intr\n");
212 build_iovec(&iov, &iovlen, "intr", NULL, 0);
213 break;
214 case 'L':
215 printf("-L deprecated, use -o nolockd\n");
216 build_iovec(&iov, &iovlen, "nolockd", NULL, 0);
217 break;
218 case 'l':
219 printf("-l deprecated, -o rdirplus\n");
220 build_iovec(&iov, &iovlen, "rdirplus", NULL, 0);
221 break;
222 case 'N':
223 printf("-N deprecated, do not specify -o resvport\n");
224 break;
225 case 'o': {
226 int pass_flag_to_nmount;
227 char *opt = optarg;
228 while (opt) {
229 char *pval = NULL;
230 char *pnextopt = NULL;
231 const char *val = "";
232 pass_flag_to_nmount = 1;
233 pnextopt = strchr(opt, ',');
234 if (pnextopt != NULL) {
235 *pnextopt = '\0';
236 pnextopt++;
237 }
238 pval = strchr(opt, '=');
239 if (pval != NULL) {
240 *pval = '\0';
241 val = pval + 1;
242 }
243 if (strcmp(opt, "bg") == 0) {
244 opflags |= BGRND;
245 pass_flag_to_nmount=0;
246 } else if (strcmp(opt, "fg") == 0) {
247 /* same as not specifying -o bg */
248 pass_flag_to_nmount=0;
249 } else if (strcmp(opt, "gssname") == 0) {
250 pass_flag_to_nmount = 0;
251 gssname = val;
252 } else if (strcmp(opt, "mntudp") == 0) {
253 mnttcp_ok = 0;
254 nfsproto = IPPROTO_UDP;
255 } else if (strcmp(opt, "udp") == 0) {
256 nfsproto = IPPROTO_UDP;
257 } else if (strcmp(opt, "tcp") == 0) {
258 nfsproto = IPPROTO_TCP;
259 } else if (strcmp(opt, "noinet4") == 0) {
260 pass_flag_to_nmount=0;
261 opflags |= OF_NOINET4;
262 } else if (strcmp(opt, "noinet6") == 0) {
263 pass_flag_to_nmount=0;
264 opflags |= OF_NOINET6;
265 } else if (strcmp(opt, "noconn") == 0) {
266 noconn = 1;
267 } else if (strcmp(opt, "nfsv2") == 0) {
268 pass_flag_to_nmount=0;
269 mountmode = V2;
270 } else if (strcmp(opt, "nfsv3") == 0) {
271 mountmode = V3;
272 } else if (strcmp(opt, "nfsv4") == 0) {
273 pass_flag_to_nmount=0;
274 mountmode = V4;
275 fstype = "nfs";
276 nfsproto = IPPROTO_TCP;
277 if (portspec == NULL)
278 portspec = "2049";
279 } else if (strcmp(opt, "port") == 0) {
280 pass_flag_to_nmount=0;
281 asprintf(&tmp, "%d", atoi(val));
282 if (tmp == NULL)
283 err(1, "asprintf");
284 portspec = tmp;
285 } else if (strcmp(opt, "principal") == 0) {
286 got_principal = 1;
287 } else if (strcmp(opt, "proto") == 0) {
288 pass_flag_to_nmount=0;
289 if (strcmp(val, "tcp") == 0) {
290 nfsproto = IPPROTO_TCP;
291 opflags |= OF_NOINET6;
292 build_iovec(&iov, &iovlen,
293 "tcp", NULL, 0);
294 } else if (strcmp(val, "udp") == 0) {
295 mnttcp_ok = 0;
296 nfsproto = IPPROTO_UDP;
297 opflags |= OF_NOINET6;
298 build_iovec(&iov, &iovlen,
299 "udp", NULL, 0);
300 } else if (strcmp(val, "tcp6") == 0) {
301 nfsproto = IPPROTO_TCP;
302 opflags |= OF_NOINET4;
303 build_iovec(&iov, &iovlen,
304 "tcp", NULL, 0);
305 } else if (strcmp(val, "udp6") == 0) {
306 mnttcp_ok = 0;
307 nfsproto = IPPROTO_UDP;
308 opflags |= OF_NOINET4;
309 build_iovec(&iov, &iovlen,
310 "udp", NULL, 0);
311 } else {
312 errx(1,
313 "illegal proto value -- %s",
314 val);
315 }
316 } else if (strcmp(opt, "sec") == 0) {
317 /*
318 * Don't add this option to
319 * the iovec yet - we will
320 * negotiate which sec flavor
321 * to use with the remote
322 * mountd.
323 */
324 pass_flag_to_nmount=0;
325 secflavor = sec_name_to_num(val);
326 if (secflavor < 0) {
327 errx(1,
328 "illegal sec value -- %s",
329 val);
330 }
331 } else if (strcmp(opt, "retrycnt") == 0) {
332 pass_flag_to_nmount=0;
333 num = strtol(val, &p, 10);
334 if (*p || num < 0)
335 errx(1, "illegal retrycnt value -- %s", val);
336 retrycnt = num;
337 } else if (strcmp(opt, "maxgroups") == 0) {
338 num = strtol(val, &p, 10);
339 if (*p || num <= 0)
340 errx(1, "illegal maxgroups value -- %s", val);
341 //set_rpc_maxgrouplist(num);
342 } else if (strcmp(opt, "vers") == 0) {
343 num = strtol(val, &p, 10);
344 if (*p || num <= 0)
345 errx(1, "illegal vers value -- "
346 "%s", val);
347 switch (num) {
348 case 2:
349 mountmode = V2;
350 break;
351 case 3:
352 mountmode = V3;
353 build_iovec(&iov, &iovlen,
354 "nfsv3", NULL, 0);
355 break;
356 case 4:
357 mountmode = V4;
358 fstype = "nfs";
359 nfsproto = IPPROTO_TCP;
360 if (portspec == NULL)
361 portspec = "2049";
362 break;
363 default:
364 errx(1, "illegal nfs version "
365 "value -- %s", val);
366 }
367 pass_flag_to_nmount=0;
368 }
369 if (pass_flag_to_nmount) {
370 build_iovec(&iov, &iovlen, opt,
371 __DECONST(void *, val),
372 strlen(val) + 1);
373 }
374 opt = pnextopt;
375 }
376 }
377 break;
378 case 'P':
379 /* obsolete for -o noresvport now default */
380 printf("-P deprecated, use -o noresvport\n");
381 build_iovec(&iov, &iovlen, "noresvport", NULL, 0);
382 break;
383 case 'R':
384 printf("-R deprecated, use -o retrycnt=<retrycnt>\n");
385 num = strtol(optarg, &p, 10);
386 if (*p || num < 0)
387 errx(1, "illegal -R value -- %s", optarg);
388 retrycnt = num;
389 break;
390 case 'r':
391 printf("-r deprecated, use -o rsize=<rsize>\n");
392 build_iovec(&iov, &iovlen, "rsize", optarg, (size_t)-1);
393 break;
394 case 's':
395 printf("-s deprecated, use -o soft\n");
396 build_iovec(&iov, &iovlen, "soft", NULL, 0);
397 break;
398 case 'T':
399 nfsproto = IPPROTO_TCP;
400 printf("-T deprecated, use -o tcp\n");
401 break;
402 case 't':
403 printf("-t deprecated, use -o timeout=<value>\n");
404 build_iovec(&iov, &iovlen, "timeout", optarg, (size_t)-1);
405 break;
406 case 'w':
407 printf("-w deprecated, use -o wsize=<value>\n");
408 build_iovec(&iov, &iovlen, "wsize", optarg, (size_t)-1);
409 break;
410 case 'x':
411 printf("-x deprecated, use -o retrans=<value>\n");
412 build_iovec(&iov, &iovlen, "retrans", optarg, (size_t)-1);
413 break;
414 case 'U':
415 printf("-U deprecated, use -o mntudp\n");
416 mnttcp_ok = 0;
417 nfsproto = IPPROTO_UDP;
418 build_iovec(&iov, &iovlen, "mntudp", NULL, 0);
419 break;
420 default:
421 usage();
422 break;
423 }
424 argc -= optind;
425 argv += optind;
426
427 if (argc != 2) {
428 usage();
429 /* NOTREACHED */
430 }
431
432 spec = *argv++;
433 mntname = *argv;
434
435 if (retrycnt == -1)
436 /* The default is to keep retrying forever. */
437 retrycnt = 0;
438
439 /*
440 * If the fstye is "oldnfs", run the old NFS client unless the
441 * "nfsv4" option was specified.
442 */
443 if (strcmp(fstype, "nfs") == 0) {
444 if (modfind("nfscl") < 0) {
445 /* Not present in kernel, try loading it */
446 if (kldload("nfscl") < 0 ||
447 modfind("nfscl") < 0)
448 errx(1, "nfscl is not available");
449 }
450 }
451
452 /*
453 * Add the fqdn to the gssname, as required.
454 */
455 if (gssname != NULL) {
456 if (strchr(gssname, '@') == NULL &&
457 gethostname(hostname, MAXHOSTNAMELEN) == 0) {
458 snprintf(gssn, sizeof (gssn), "%s@%s", gssname,
459 hostname);
460 gssname = gssn;
461 }
462 build_iovec(&iov, &iovlen, "gssname",
463 __DECONST(void *, gssname), strlen(gssname) + 1);
464 }
465
466 if (!getnfsargs(spec, &iov, &iovlen))
467 exit(1);
468
469 /* resolve the mountpoint with realpath(3) */
470 if (checkpath(mntname, mntpath) != 0)
471 err(1, "%s", mntpath);
472
473 build_iovec(&iov, &iovlen, "fstype",
474 __DECONST(void *, fstype), (size_t)-1);
475 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
476 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
477
478 if (nmount(iov, iovlen, 0))
479 err(1, "nmount: %s%s%s", mntpath, errmsg[0] ? ", " : "",
480 errmsg);
481
482 exit(0);
483 }
484
485 static int
sec_name_to_num(const char * sec)486 sec_name_to_num(const char *sec)
487 {
488 if (!strcmp(sec, "krb5"))
489 return (RPCSEC_GSS_KRB5);
490 if (!strcmp(sec, "krb5i"))
491 return (RPCSEC_GSS_KRB5I);
492 if (!strcmp(sec, "krb5p"))
493 return (RPCSEC_GSS_KRB5P);
494 if (!strcmp(sec, "sys"))
495 return (AUTH_SYS);
496 return (-1);
497 }
498
499 static const char *
sec_num_to_name(int flavor)500 sec_num_to_name(int flavor)
501 {
502 switch (flavor) {
503 case RPCSEC_GSS_KRB5:
504 return ("krb5");
505 case RPCSEC_GSS_KRB5I:
506 return ("krb5i");
507 case RPCSEC_GSS_KRB5P:
508 return ("krb5p");
509 case AUTH_SYS:
510 return ("sys");
511 }
512 return (NULL);
513 }
514
515 static int
getnfsargs(char * spec,struct iovec ** iov,int * iovlen)516 getnfsargs(char *spec, struct iovec **iov, int *iovlen)
517 {
518 struct addrinfo hints, *ai_nfs, *ai;
519 enum tryret ret;
520 int ecode, speclen, remoteerr, offset, have_bracket = 0;
521 char *hostp, *delimp, *errstr;
522 size_t len;
523 static char nam[MNAMELEN + 1], pname[MAXHOSTNAMELEN + 5];
524
525 if (*spec == '[' && (delimp = strchr(spec + 1, ']')) != NULL &&
526 *(delimp + 1) == ':') {
527 hostp = spec + 1;
528 spec = delimp + 2;
529 have_bracket = 1;
530 } else if ((delimp = strrchr(spec, ':')) != NULL) {
531 hostp = spec;
532 spec = delimp + 1;
533 } else if ((delimp = strrchr(spec, '@')) != NULL) {
534 warnx("path@server syntax is deprecated, use server:path");
535 hostp = delimp + 1;
536 } else {
537 warnx("no <host>:<dirpath> nfs-name");
538 return (0);
539 }
540 *delimp = '\0';
541
542 /*
543 * If there has been a trailing slash at mounttime it seems
544 * that some mountd implementations fail to remove the mount
545 * entries from their mountlist while unmounting.
546 */
547 for (speclen = strlen(spec);
548 speclen > 1 && spec[speclen - 1] == '/';
549 speclen--)
550 spec[speclen - 1] = '\0';
551 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
552 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
553 return (0);
554 }
555 /* Make both '@' and ':' notations equal */
556 if (*hostp != '\0') {
557 len = strlen(hostp);
558 offset = 0;
559 if (have_bracket)
560 nam[offset++] = '[';
561 memmove(nam + offset, hostp, len);
562 if (have_bracket)
563 nam[len + offset++] = ']';
564 nam[len + offset++] = ':';
565 memmove(nam + len + offset, spec, speclen);
566 nam[len + speclen + offset] = '\0';
567 }
568
569 /*
570 * Handle an internet host address.
571 */
572 memset(&hints, 0, sizeof hints);
573 hints.ai_flags = AI_NUMERICHOST;
574 if (nfsproto == IPPROTO_TCP)
575 hints.ai_socktype = SOCK_STREAM;
576 else if (nfsproto == IPPROTO_UDP)
577 hints.ai_socktype = SOCK_DGRAM;
578
579 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) {
580 hints.ai_flags = AI_CANONNAME;
581 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs))
582 != 0) {
583 if (portspec == NULL)
584 errx(1, "%s: %s", hostp, gai_strerror(ecode));
585 else
586 errx(1, "%s:%s: %s", hostp, portspec,
587 gai_strerror(ecode));
588 return (0);
589 }
590
591 /*
592 * For a Kerberized nfs mount where the "principal"
593 * argument has not been set, add it here.
594 */
595 if (got_principal == 0 && secflavor != AUTH_SYS &&
596 ai_nfs->ai_canonname != NULL) {
597 snprintf(pname, sizeof (pname), "nfs@%s",
598 ai_nfs->ai_canonname);
599 build_iovec(iov, iovlen, "principal", pname,
600 strlen(pname) + 1);
601 }
602 }
603
604 ret = TRYRET_LOCALERR;
605 for (;;) {
606 /*
607 * Try each entry returned by getaddrinfo(). Note the
608 * occurrence of remote errors by setting `remoteerr'.
609 */
610 remoteerr = 0;
611 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) {
612 if ((ai->ai_family == AF_INET6) &&
613 (opflags & OF_NOINET6))
614 continue;
615 if ((ai->ai_family == AF_INET) &&
616 (opflags & OF_NOINET4))
617 continue;
618 ret = nfs_tryproto(ai, hostp, spec, &errstr, iov,
619 iovlen);
620 if (ret == TRYRET_SUCCESS)
621 break;
622 if (ret != TRYRET_LOCALERR)
623 remoteerr = 1;
624 if ((opflags & ISBGRND) == 0)
625 fprintf(stderr, "%s\n", errstr);
626 }
627 if (ret == TRYRET_SUCCESS)
628 break;
629
630 /* Exit if all errors were local. */
631 if (!remoteerr)
632 exit(1);
633
634 /*
635 * If retrycnt == 0, we are to keep retrying forever.
636 * Otherwise decrement it, and exit if it hits zero.
637 */
638 if (retrycnt != 0 && --retrycnt == 0)
639 exit(1);
640
641 if ((opflags & (BGRND | ISBGRND)) == BGRND) {
642 warnx("Cannot immediately mount %s:%s, backgrounding",
643 hostp, spec);
644 opflags |= ISBGRND;
645 if (daemon(0, 0) != 0)
646 err(1, "daemon");
647 }
648 sleep(60);
649 }
650 freeaddrinfo(ai_nfs);
651
652 build_iovec(iov, iovlen, "hostname", nam, (size_t)-1);
653 /* Add mounted file system to PATH_MOUNTTAB */
654 if (!add_mtab(hostp, spec))
655 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
656 return (1);
657 }
658
659 /*
660 * Try to set up the NFS arguments according to the address
661 * family, protocol (and possibly port) specified in `ai'.
662 *
663 * Returns TRYRET_SUCCESS if successful, or:
664 * TRYRET_TIMEOUT The server did not respond.
665 * TRYRET_REMOTEERR The server reported an error.
666 * TRYRET_LOCALERR Local failure.
667 *
668 * In all error cases, *errstr will be set to a statically-allocated string
669 * describing the error.
670 */
671 static enum tryret
nfs_tryproto(struct addrinfo * ai,char * hostp,char * spec,char ** errstr,struct iovec ** iov,int * iovlen)672 nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec, char **errstr,
673 struct iovec **iov, int *iovlen)
674 {
675 static char errbuf[256];
676 struct sockaddr_storage nfs_ss;
677 struct netbuf nfs_nb;
678 struct nfhret nfhret;
679 struct timeval try;
680 struct rpc_err rpcerr;
681 CLIENT *clp;
682 struct netconfig *nconf, *nconf_mnt;
683 const char *netid, *netid_mnt, *secname;
684 int doconnect, nfsvers, mntvers, sotype;
685 enum clnt_stat clntstat;
686 enum mountmode trymntmode;
687
688 sotype = 0;
689 trymntmode = mountmode;
690 errbuf[0] = '\0';
691 *errstr = errbuf;
692
693 if (nfsproto == IPPROTO_TCP)
694 sotype = SOCK_STREAM;
695 else if (nfsproto == IPPROTO_UDP)
696 sotype = SOCK_DGRAM;
697
698 if ((netid = netidbytype(ai->ai_family, sotype)) == NULL) {
699 snprintf(errbuf, sizeof errbuf,
700 "af %d sotype %d not supported", ai->ai_family, sotype);
701 return (TRYRET_LOCALERR);
702 }
703 if ((nconf = getnetconf_cached(netid)) == NULL) {
704 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror());
705 return (TRYRET_LOCALERR);
706 }
707 /* The RPCPROG_MNT netid may be different. */
708 if (mnttcp_ok) {
709 netid_mnt = netid;
710 nconf_mnt = nconf;
711 } else {
712 if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM))
713 == NULL) {
714 snprintf(errbuf, sizeof errbuf,
715 "af %d sotype SOCK_DGRAM not supported",
716 ai->ai_family);
717 return (TRYRET_LOCALERR);
718 }
719 if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) {
720 snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt,
721 nc_sperror());
722 return (TRYRET_LOCALERR);
723 }
724 }
725
726 tryagain:
727 if (trymntmode == V4) {
728 nfsvers = 4;
729 mntvers = 3; /* Workaround for GCC. */
730 } else if (trymntmode == V2) {
731 nfsvers = 2;
732 mntvers = 1;
733 } else {
734 nfsvers = 3;
735 mntvers = 3;
736 }
737
738 if (portspec != NULL) {
739 /* `ai' contains the complete nfsd sockaddr. */
740 nfs_nb.buf = ai->ai_addr;
741 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen;
742 } else {
743 /* Ask the remote rpcbind. */
744 nfs_nb.buf = &nfs_ss;
745 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss;
746
747 if (!rpcb_getaddr(NFS_PROGRAM, nfsvers, nconf, &nfs_nb,
748 hostp)) {
749 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH &&
750 trymntmode == ANY) {
751 trymntmode = V2;
752 goto tryagain;
753 }
754 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s",
755 netid, hostp, spec,
756 clnt_spcreateerror("RPCPROG_NFS"));
757 return (returncode(rpc_createerr.cf_stat,
758 &rpc_createerr.cf_error));
759 }
760 }
761
762 /* Check that the server (nfsd) responds on the port we have chosen. */
763 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, NFS_PROGRAM, nfsvers,
764 0, 0);
765 if (clp == NULL) {
766 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
767 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS"));
768 return (returncode(rpc_createerr.cf_stat,
769 &rpc_createerr.cf_error));
770 }
771 if (sotype == SOCK_DGRAM && noconn == 0) {
772 /*
773 * Use connect(), to match what the kernel does. This
774 * catches cases where the server responds from the
775 * wrong source address.
776 */
777 doconnect = 1;
778 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) {
779 clnt_destroy(clp);
780 snprintf(errbuf, sizeof errbuf,
781 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp,
782 spec);
783 return (TRYRET_LOCALERR);
784 }
785 }
786
787 try.tv_sec = 10;
788 try.tv_usec = 0;
789 clntstat = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL,
790 (xdrproc_t)xdr_void, NULL, try);
791 if (clntstat != RPC_SUCCESS) {
792 if (clntstat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
793 clnt_destroy(clp);
794 trymntmode = V2;
795 goto tryagain;
796 }
797 clnt_geterr(clp, &rpcerr);
798 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
799 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL"));
800 clnt_destroy(clp);
801 return (returncode(clntstat, &rpcerr));
802 }
803 clnt_destroy(clp);
804
805 /*
806 * For NFSv4, there is no mount protocol.
807 */
808 if (trymntmode == V4) {
809 /*
810 * Store the server address in nfsargsp, making
811 * sure to copy any locally allocated structures.
812 */
813 addrlen = nfs_nb.len;
814 addr = malloc(addrlen);
815 if (addr == NULL)
816 err(1, "malloc");
817 bcopy(nfs_nb.buf, addr, addrlen);
818
819 build_iovec(iov, iovlen, "addr", addr, addrlen);
820 secname = sec_num_to_name(secflavor);
821 if (secname != NULL) {
822 build_iovec(iov, iovlen, "sec",
823 __DECONST(void *, secname), (size_t)-1);
824 }
825 build_iovec(iov, iovlen, "nfsv4", NULL, 0);
826 build_iovec(iov, iovlen, "dirpath", spec, (size_t)-1);
827
828 return (TRYRET_SUCCESS);
829 }
830
831 /* Send the MOUNTPROC_MNT RPC to get the root filehandle. */
832 try.tv_sec = 10;
833 try.tv_usec = 0;
834 clp = clnt_tp_create(hostp, MOUNTPROG, mntvers, nconf_mnt);
835 if (clp == NULL) {
836 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
837 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create"));
838 return (returncode(rpc_createerr.cf_stat,
839 &rpc_createerr.cf_error));
840 }
841 clp->cl_auth = authsys_create_default();
842 nfhret.auth = secflavor;
843 nfhret.vers = mntvers;
844 clntstat = clnt_call(clp, MOUNTPROC_MNT, (xdrproc_t)xdr_dir, spec,
845 (xdrproc_t)xdr_fh, &nfhret,
846 try);
847 auth_destroy(clp->cl_auth);
848 if (clntstat != RPC_SUCCESS) {
849 if (clntstat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
850 clnt_destroy(clp);
851 trymntmode = V2;
852 goto tryagain;
853 }
854 clnt_geterr(clp, &rpcerr);
855 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
856 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT"));
857 clnt_destroy(clp);
858 return (returncode(clntstat, &rpcerr));
859 }
860 clnt_destroy(clp);
861
862 if (nfhret.stat != 0) {
863 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
864 hostp, spec, strerror(nfhret.stat));
865 return (TRYRET_REMOTEERR);
866 }
867
868 /*
869 * Store the filehandle and server address in nfsargsp, making
870 * sure to copy any locally allocated structures.
871 */
872 addrlen = nfs_nb.len;
873 addr = malloc(addrlen);
874 fhsize = nfhret.fhsize;
875 fh = malloc(fhsize);
876 if (addr == NULL || fh == NULL)
877 err(1, "malloc");
878 bcopy(nfs_nb.buf, addr, addrlen);
879 bcopy(nfhret.nfh, fh, fhsize);
880
881 build_iovec(iov, iovlen, "addr", addr, addrlen);
882 build_iovec(iov, iovlen, "fh", fh, fhsize);
883 secname = sec_num_to_name(nfhret.auth);
884 if (secname) {
885 build_iovec(iov, iovlen, "sec",
886 __DECONST(void *, secname), (size_t)-1);
887 }
888 if (nfsvers == 3)
889 build_iovec(iov, iovlen, "nfsv3", NULL, 0);
890
891 return (TRYRET_SUCCESS);
892 }
893
894 /*
895 * Catagorise a RPC return status and error into an `enum tryret'
896 * return code.
897 */
898 static enum tryret
returncode(enum clnt_stat clntstat,struct rpc_err * rpcerr)899 returncode(enum clnt_stat clntstat, struct rpc_err *rpcerr)
900 {
901
902 switch (clntstat) {
903 case RPC_TIMEDOUT:
904 return (TRYRET_TIMEOUT);
905 case RPC_PMAPFAILURE:
906 case RPC_PROGNOTREGISTERED:
907 case RPC_PROGVERSMISMATCH:
908 /* XXX, these can be local or remote. */
909 case RPC_CANTSEND:
910 case RPC_CANTRECV:
911 return (TRYRET_REMOTEERR);
912 case RPC_SYSTEMERROR:
913 switch (rpcerr->re_errno) {
914 case ETIMEDOUT:
915 return (TRYRET_TIMEOUT);
916 case ENOMEM:
917 break;
918 default:
919 return (TRYRET_REMOTEERR);
920 }
921 /* FALLTHROUGH */
922 default:
923 break;
924 }
925 return (TRYRET_LOCALERR);
926 }
927
928 /*
929 * Look up a netid based on an address family and socket type.
930 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM.
931 *
932 * XXX there should be a library function for this.
933 */
934 static const char *
netidbytype(int af,int sotype)935 netidbytype(int af, int sotype)
936 {
937 struct nc_protos *p;
938
939 for (p = nc_protos; p->netid != NULL; p++) {
940 if (af != p->af || sotype != p->sotype)
941 continue;
942 return (p->netid);
943 }
944 return (NULL);
945 }
946
947 /*
948 * Look up a netconfig entry based on a netid, and cache the result so
949 * that we don't need to remember to call freenetconfigent().
950 *
951 * Otherwise it behaves just like getnetconfigent(), so nc_*error()
952 * work on failure.
953 */
954 static struct netconfig *
getnetconf_cached(const char * netid)955 getnetconf_cached(const char *netid)
956 {
957 static struct nc_entry {
958 struct netconfig *nconf;
959 struct nc_entry *next;
960 } *head;
961 struct nc_entry *p;
962 struct netconfig *nconf;
963
964 for (p = head; p != NULL; p = p->next)
965 if (strcmp(netid, p->nconf->nc_netid) == 0)
966 return (p->nconf);
967
968 if ((nconf = getnetconfigent(netid)) == NULL)
969 return (NULL);
970 if ((p = malloc(sizeof(*p))) == NULL)
971 err(1, "malloc");
972 p->nconf = nconf;
973 p->next = head;
974 head = p;
975
976 return (p->nconf);
977 }
978
979 /*
980 * xdr routines for mount rpc's
981 */
982 static int
xdr_dir(XDR * xdrsp,char * dirp)983 xdr_dir(XDR *xdrsp, char *dirp)
984 {
985 return (xdr_string(xdrsp, &dirp, MNTPATHLEN));
986 }
987
988 static int
xdr_fh(XDR * xdrsp,struct nfhret * np)989 xdr_fh(XDR *xdrsp, struct nfhret *np)
990 {
991 int i;
992 long auth, authcnt, authfnd = 0;
993
994 if (!xdr_u_long(xdrsp, &np->stat))
995 return (0);
996 if (np->stat)
997 return (1);
998 switch (np->vers) {
999 case 1:
1000 np->fhsize = NFS_FHSIZE;
1001 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFS_FHSIZE));
1002 case 3:
1003 if (!xdr_long(xdrsp, &np->fhsize))
1004 return (0);
1005 if (np->fhsize <= 0 || np->fhsize > NFS3_FHSIZE)
1006 return (0);
1007 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
1008 return (0);
1009 if (!xdr_long(xdrsp, &authcnt))
1010 return (0);
1011 for (i = 0; i < authcnt; i++) {
1012 if (!xdr_long(xdrsp, &auth))
1013 return (0);
1014 if (np->auth == -1) {
1015 np->auth = auth;
1016 authfnd++;
1017 } else if (auth == np->auth) {
1018 authfnd++;
1019 }
1020 }
1021 /*
1022 * Some servers, such as DEC's OSF/1 return a nil authenticator
1023 * list to indicate RPCAUTH_UNIX.
1024 */
1025 if (authcnt == 0 && np->auth == -1)
1026 np->auth = AUTH_SYS;
1027 if (!authfnd && (authcnt > 0 || np->auth != AUTH_SYS))
1028 np->stat = EAUTH;
1029 return (1);
1030 };
1031 return (0);
1032 }
1033
1034 static void
usage(void)1035 usage(void)
1036 {
1037 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
1038 "usage: mount_nfs [-23bcdiLlNPsTU] [-a maxreadahead] [-D deadthresh]",
1039 " [-g maxgroups] [-I readdirsize] [-o options] [-R retrycnt]",
1040 " [-r readsize] [-t timeout] [-w writesize] [-x retrans]",
1041 " rhost:path node");
1042 exit(1);
1043 }
1044