Remove some unnecessary casts.
[dragonfly.git] / sbin / mount_nfs / mount_nfs.c
CommitLineData
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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. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
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35 *
36 * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California. All rights reserved.
37 * @(#)mount_nfs.c 8.11 (Berkeley) 5/4/95
38 * $FreeBSD: src/sbin/mount_nfs/mount_nfs.c,v 1.36.2.6 2003/05/13 14:45:40 trhodes Exp $
9e754ee2 39 * $DragonFly: src/sbin/mount_nfs/mount_nfs.c,v 1.14 2008/07/14 22:22:40 dillon Exp $
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40 */
41
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42#include <sys/param.h>
43#include <sys/mount.h>
44#include <sys/stat.h>
45#include <sys/syslog.h>
46
47#include <rpc/rpc.h>
48#include <rpc/pmap_clnt.h>
49#include <rpc/pmap_prot.h>
50
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51#include <vfs/nfs/rpcv2.h>
52#include <vfs/nfs/nfsproto.h>
53#include <vfs/nfs/nfs.h>
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54
55#include <arpa/inet.h>
56
57#include <ctype.h>
58#include <err.h>
59#include <errno.h>
60#include <netdb.h>
61#include <stdio.h>
62#include <stdlib.h>
63#include <strings.h>
64#include <sysexits.h>
65#include <unistd.h>
cafd601b 66#include <resolv.h>
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67
68#include "mntopts.h"
69#include "mounttab.h"
70
71#define ALTF_BG 0x1
72#define ALTF_NOCONN 0x2
73#define ALTF_DUMBTIMR 0x4
74#define ALTF_INTR 0x8
75#define ALTF_KERB 0x10
76#define ALTF_NFSV3 0x20
77#define ALTF_RDIRPLUS 0x40
78#define ALTF_MNTUDP 0x80
79#define ALTF_RESVPORT 0x100
80#define ALTF_SEQPACKET 0x200
e07fef60 81#define ALTF_UNUSED400 0x400
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82#define ALTF_SOFT 0x800
83#define ALTF_TCP 0x1000
84#define ALTF_PORT 0x2000
85#define ALTF_NFSV2 0x4000
86#define ALTF_ACREGMIN 0x8000
87#define ALTF_ACREGMAX 0x10000
88#define ALTF_ACDIRMIN 0x20000
89#define ALTF_ACDIRMAX 0x40000
90
91struct mntopt mopts[] = {
92 MOPT_STDOPTS,
93 MOPT_FORCE,
94 MOPT_UPDATE,
95 MOPT_ASYNC,
96 { "bg", 0, ALTF_BG, 1 },
97 { "conn", 1, ALTF_NOCONN, 1 },
98 { "dumbtimer", 0, ALTF_DUMBTIMR, 1 },
99 { "intr", 0, ALTF_INTR, 1 },
100#ifdef NFSKERB
101 { "kerb", 0, ALTF_KERB, 1 },
102#endif
103 { "nfsv3", 0, ALTF_NFSV3, 1 },
104 { "rdirplus", 0, ALTF_RDIRPLUS, 1 },
105 { "mntudp", 0, ALTF_MNTUDP, 1 },
106 { "resvport", 0, ALTF_RESVPORT, 1 },
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107 { "soft", 0, ALTF_SOFT, 1 },
108 { "tcp", 0, ALTF_TCP, 1 },
109 { "port=", 0, ALTF_PORT, 1 },
110 { "nfsv2", 0, ALTF_NFSV2, 1 },
111 { "acregmin=", 0, ALTF_ACREGMIN, 1 },
112 { "acregmax=", 0, ALTF_ACREGMAX, 1 },
113 { "acdirmin=", 0, ALTF_ACDIRMIN, 1 },
114 { "acdirmax=", 0, ALTF_ACDIRMAX, 1 },
340240ff 115 MOPT_NULL
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116};
117
118struct nfs_args nfsdefargs = {
119 NFS_ARGSVERSION,
120 (struct sockaddr *)0,
121 sizeof (struct sockaddr_in),
122 SOCK_DGRAM,
123 0,
124 (u_char *)0,
125 0,
126 NFSMNT_RESVPORT,
127 NFS_WSIZE,
128 NFS_RSIZE,
129 NFS_READDIRSIZE,
130 10,
131 NFS_RETRANS,
132 NFS_MAXGRPS,
133 NFS_DEFRAHEAD,
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134 0,
135 NFS_DEADTHRESH,
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136 (char *)0,
137 /* args version 4 */
138 NFS_MINATTRTIMO,
139 NFS_MAXATTRTIMO,
140 NFS_MINDIRATTRTIMO,
141 NFS_MAXDIRATTRTIMO,
142};
143
144struct nfhret {
145 u_long stat;
146 long vers;
147 long auth;
148 long fhsize;
149 u_char nfh[NFSX_V3FHMAX];
150};
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151
152#define BGRND 0x0001
153#define ISBGRND 0x0002
154#define DIDWARN 0x0004
155
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156int retrycnt = -1;
157int opflags = 0;
158int nfsproto = IPPROTO_UDP;
159int mnttcp_ok = 1;
160u_short port_no = 0;
161enum mountmode {
162 ANY,
163 V2,
164 V3
165} mountmode = ANY;
166
167#ifdef NFSKERB
168char inst[INST_SZ];
169char realm[REALM_SZ];
170struct {
171 u_long kind;
172 KTEXT_ST kt;
173} ktick;
174struct nfsrpc_nickverf kverf;
175struct nfsrpc_fullblock kin, kout;
176NFSKERBKEY_T kivec;
177CREDENTIALS kcr;
178struct timeval ktv;
179NFSKERBKEYSCHED_T kerb_keysched;
180#endif
181
182/* Return codes for nfs_tryproto. */
183enum tryret {
184 TRYRET_SUCCESS,
185 TRYRET_TIMEOUT, /* No response received. */
186 TRYRET_REMOTEERR, /* Error received from remote server. */
187 TRYRET_LOCALERR /* Local failure. */
188};
189
9a76cd75 190void set_rpc_maxgrouplist(int);
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191
192static int getnfsargs(char *, struct nfs_args *);
193static void usage(void) __dead2;
194static int xdr_dir(XDR *, char *);
195static int xdr_fh(XDR *, struct nfhret *);
196static enum tryret
197 nfs_tryproto(struct nfs_args *, struct sockaddr_in *,
198 char *, char *, char **);
199static enum tryret
200 returncode(enum clnt_stat, struct rpc_err *);
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201
202/*
203 * Used to set mount flags with getmntopts. Call with dir=TRUE to
204 * initialize altflags from the current mount flags. Call with
205 * dir=FALSE to update mount flags with the new value of altflags after
206 * the call to getmntopts.
207 */
208static void
209set_flags(int* altflags, int* nfsflags, int dir)
210{
211#define F2(af, nf) \
212 if (dir) { \
213 if (*nfsflags & NFSMNT_##nf) \
214 *altflags |= ALTF_##af; \
215 else \
216 *altflags &= ~ALTF_##af; \
217 } else { \
218 if (*altflags & ALTF_##af) \
219 *nfsflags |= NFSMNT_##nf; \
220 else \
221 *nfsflags &= ~NFSMNT_##nf; \
222 }
223#define F(f) F2(f,f)
224
225 F(NOCONN);
226 F(DUMBTIMR);
227 F2(INTR, INT);
228#ifdef NFSKERB
229 F(KERB);
230#endif
231 F(RDIRPLUS);
232 F(RESVPORT);
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233 F(SOFT);
234 F(ACREGMIN);
235 F(ACREGMAX);
236 F(ACDIRMIN);
237 F(ACDIRMAX);
238
239#undef F
240#undef F2
241}
242
243int
b5744197 244main(int argc, char **argv)
984263bc 245{
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246 int c;
247 struct nfs_args *nfsargsp;
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248 struct nfs_args nfsargs;
249 struct nfsd_cargs ncd;
250 int mntflags, altflags, nfssvc_flag, num;
251 char *name, *p, *spec;
252 char mntpath[MAXPATHLEN];
253 struct vfsconf vfc;
254 int error = 0;
255#ifdef NFSKERB
256 uid_t last_ruid;
257
258 last_ruid = -1;
7cee7052 259 strcpy(realm, KRB_REALM);
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260 if (sizeof (struct nfsrpc_nickverf) != RPCX_NICKVERF ||
261 sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK ||
262 ((char *)&ktick.kt) - ((char *)&ktick) != NFSX_UNSIGNED ||
263 ((char *)ktick.kt.dat) - ((char *)&ktick) != 2 * NFSX_UNSIGNED)
264 fprintf(stderr, "Yikes! NFSKERB structs not packed!!\n");
265#endif /* NFSKERB */
266
267 mntflags = 0;
268 altflags = 0;
269 nfsargs = nfsdefargs;
270 nfsargsp = &nfsargs;
271 while ((c = getopt(argc, argv,
e07fef60 272 "23a:bcdD:g:I:iKlm:No:PR:r:sTt:w:x:U")) != -1)
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273 switch (c) {
274 case '2':
275 mountmode = V2;
276 break;
277 case '3':
278 mountmode = V3;
279 break;
280 case 'a':
281 num = strtol(optarg, &p, 10);
282 if (*p || num < 0)
283 errx(1, "illegal -a value -- %s", optarg);
284 nfsargsp->readahead = num;
285 nfsargsp->flags |= NFSMNT_READAHEAD;
286 break;
287 case 'b':
288 opflags |= BGRND;
289 break;
290 case 'c':
291 nfsargsp->flags |= NFSMNT_NOCONN;
292 break;
293 case 'D':
294 num = strtol(optarg, &p, 10);
295 if (*p || num <= 0)
296 errx(1, "illegal -D value -- %s", optarg);
297 nfsargsp->deadthresh = num;
298 nfsargsp->flags |= NFSMNT_DEADTHRESH;
299 break;
300 case 'd':
301 nfsargsp->flags |= NFSMNT_DUMBTIMR;
302 break;
303 case 'g':
304 num = strtol(optarg, &p, 10);
305 if (*p || num <= 0)
306 errx(1, "illegal -g value -- %s", optarg);
307 set_rpc_maxgrouplist(num);
308 nfsargsp->maxgrouplist = num;
309 nfsargsp->flags |= NFSMNT_MAXGRPS;
310 break;
311 case 'I':
312 num = strtol(optarg, &p, 10);
313 if (*p || num <= 0)
314 errx(1, "illegal -I value -- %s", optarg);
315 nfsargsp->readdirsize = num;
316 nfsargsp->flags |= NFSMNT_READDIRSIZE;
317 break;
318 case 'i':
319 nfsargsp->flags |= NFSMNT_INT;
320 break;
321#ifdef NFSKERB
322 case 'K':
323 nfsargsp->flags |= NFSMNT_KERB;
324 break;
325#endif
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326 case 'l':
327 nfsargsp->flags |= NFSMNT_RDIRPLUS;
328 break;
329#ifdef NFSKERB
330 case 'm':
7cee7052 331 strncpy(realm, optarg, REALM_SZ - 1);
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332 realm[REALM_SZ - 1] = '\0';
333 break;
334#endif
335 case 'N':
336 nfsargsp->flags &= ~NFSMNT_RESVPORT;
337 break;
338 case 'o':
339 altflags = 0;
340 set_flags(&altflags, &nfsargsp->flags, TRUE);
341 if (mountmode == V2)
342 altflags |= ALTF_NFSV2;
343 else if (mountmode == V3)
344 altflags |= ALTF_NFSV3;
345 getmntopts(optarg, mopts, &mntflags, &altflags);
346 set_flags(&altflags, &nfsargsp->flags, FALSE);
347 /*
348 * Handle altflags which don't map directly to
349 * mount flags.
350 */
351 if(altflags & ALTF_BG)
352 opflags |= BGRND;
353 if(altflags & ALTF_MNTUDP)
354 mnttcp_ok = 0;
355 if(altflags & ALTF_TCP) {
356 nfsargsp->sotype = SOCK_STREAM;
357 nfsproto = IPPROTO_TCP;
358 }
359 if(altflags & ALTF_PORT)
360 port_no = atoi(strstr(optarg, "port=") + 5);
361 mountmode = ANY;
362 if(altflags & ALTF_NFSV2)
363 mountmode = V2;
364 if(altflags & ALTF_NFSV3)
365 mountmode = V3;
366 if(altflags & ALTF_ACREGMIN)
367 nfsargsp->acregmin = atoi(strstr(optarg,
368 "acregmin=") + 9);
369 if(altflags & ALTF_ACREGMAX)
370 nfsargsp->acregmax = atoi(strstr(optarg,
371 "acregmax=") + 9);
372 if(altflags & ALTF_ACDIRMIN)
373 nfsargsp->acdirmin = atoi(strstr(optarg,
374 "acdirmin=") + 9);
375 if(altflags & ALTF_ACDIRMAX)
376 nfsargsp->acdirmax = atoi(strstr(optarg,
377 "acdirmax=") + 9);
378 break;
379 case 'P':
380 /* obsolete for NFSMNT_RESVPORT, now default */
381 break;
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382 case 'R':
383 num = strtol(optarg, &p, 10);
384 if (*p || num < 0)
385 errx(1, "illegal -R value -- %s", optarg);
386 retrycnt = num;
387 break;
388 case 'r':
389 num = strtol(optarg, &p, 10);
390 if (*p || num <= 0)
391 errx(1, "illegal -r value -- %s", optarg);
392 nfsargsp->rsize = num;
393 nfsargsp->flags |= NFSMNT_RSIZE;
394 break;
395 case 's':
396 nfsargsp->flags |= NFSMNT_SOFT;
397 break;
398 case 'T':
399 nfsargsp->sotype = SOCK_STREAM;
400 nfsproto = IPPROTO_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 mnttcp_ok = 0;
425 break;
426 default:
427 usage();
428 break;
429 }
430 argc -= optind;
431 argv += optind;
432
433 if (argc != 2) {
434 usage();
435 /* NOTREACHED */
436 }
437
438 spec = *argv++;
439 name = *argv;
440
441 if (retrycnt == -1)
442 /* The default is to keep retrying forever. */
443 retrycnt = 0;
444 if (!getnfsargs(spec, nfsargsp))
445 exit(1);
446
447 /* resolve the mountpoint with realpath(3) */
7cee7052 448 checkpath(name, mntpath);
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449
450 error = getvfsbyname("nfs", &vfc);
451 if (error && vfsisloadable("nfs")) {
452 if(vfsload("nfs"))
453 err(EX_OSERR, "vfsload(nfs)");
454 endvfsent(); /* clear cache */
455 error = getvfsbyname("nfs", &vfc);
456 }
457 if (error)
458 errx(EX_OSERR, "nfs filesystem is not available");
459
460 if (mount(vfc.vfc_name, mntpath, mntflags, nfsargsp))
461 err(1, "%s", mntpath);
e07fef60 462 if (nfsargsp->flags & NFSMNT_KERB) {
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463 if ((opflags & ISBGRND) == 0) {
464 if (daemon(0, 0) != 0)
465 err(1, "daemon");
466 }
467 openlog("mount_nfs", LOG_PID, LOG_DAEMON);
468 nfssvc_flag = NFSSVC_MNTD;
469 ncd.ncd_dirp = mntpath;
470 while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) {
471 if (errno != ENEEDAUTH) {
472 syslog(LOG_ERR, "nfssvc err %m");
473 continue;
474 }
475 nfssvc_flag =
476 NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL;
477#ifdef NFSKERB
478 /*
479 * Set up as ncd_authuid for the kerberos call.
480 * Must set ruid to ncd_authuid and reset the
481 * ticket name iff ncd_authuid is not the same
482 * as last time, so that the right ticket file
483 * is found.
484 * Get the Kerberos credential structure so that
485 * we have the session key and get a ticket for
486 * this uid.
487 * For more info see the IETF Draft "Authentication
488 * in ONC RPC".
489 */
490 if (ncd.ncd_authuid != last_ruid) {
491 char buf[512];
7cee7052 492 sprintf(buf, "%s%d", TKT_ROOT, ncd.ncd_authuid);
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493 krb_set_tkt_string(buf);
494 last_ruid = ncd.ncd_authuid;
495 }
496 setreuid(ncd.ncd_authuid, 0);
497 kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr);
498 if (kret == RET_NOTKT) {
499 kret = get_ad_tkt(NFS_KERBSRV, inst, realm,
500 DEFAULT_TKT_LIFE);
501 if (kret == KSUCCESS)
502 kret = krb_get_cred(NFS_KERBSRV, inst, realm,
503 &kcr);
504 }
505 if (kret == KSUCCESS)
506 kret = krb_mk_req(&ktick.kt, NFS_KERBSRV, inst,
507 realm, 0);
508
509 /*
510 * Fill in the AKN_FULLNAME authenticator and verifier.
511 * Along with the Kerberos ticket, we need to build
512 * the timestamp verifier and encrypt it in CBC mode.
513 */
514 if (kret == KSUCCESS &&
515 ktick.kt.length <= (RPCAUTH_MAXSIZ-3*NFSX_UNSIGNED)
516 && gettimeofday(&ktv, (struct timezone *)0) == 0) {
517 ncd.ncd_authtype = RPCAUTH_KERB4;
518 ncd.ncd_authstr = (u_char *)&ktick;
519 ncd.ncd_authlen = nfsm_rndup(ktick.kt.length) +
520 3 * NFSX_UNSIGNED;
521 ncd.ncd_verfstr = (u_char *)&kverf;
522 ncd.ncd_verflen = sizeof (kverf);
523 memmove(ncd.ncd_key, kcr.session,
524 sizeof (kcr.session));
525 kin.t1 = htonl(ktv.tv_sec);
526 kin.t2 = htonl(ktv.tv_usec);
527 kin.w1 = htonl(NFS_KERBTTL);
528 kin.w2 = htonl(NFS_KERBTTL - 1);
529 bzero((caddr_t)kivec, sizeof (kivec));
530
531 /*
532 * Encrypt kin in CBC mode using the session
533 * key in kcr.
534 */
535 XXX
536
537 /*
538 * Finally, fill the timestamp verifier into the
539 * authenticator and verifier.
540 */
541 ktick.kind = htonl(RPCAKN_FULLNAME);
542 kverf.kind = htonl(RPCAKN_FULLNAME);
543 NFS_KERBW1(ktick.kt) = kout.w1;
544 ktick.kt.length = htonl(ktick.kt.length);
545 kverf.verf.t1 = kout.t1;
546 kverf.verf.t2 = kout.t2;
547 kverf.verf.w2 = kout.w2;
548 nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH;
549 }
550 setreuid(0, 0);
551#endif /* NFSKERB */
552 }
553 }
554 exit(0);
555}
556
340240ff 557static int
b5744197 558getnfsargs(char *spec, struct nfs_args *nfsargsp)
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559{
560 struct hostent *hp;
561 struct sockaddr_in saddr;
2bb9b9ad 562 struct in_addr iaddr;
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563 enum tryret ret;
564 int speclen, remoteerr;
565 char *hostp, *delimp, *errstr;
566#ifdef NFSKERB
567 char *cp;
568#endif
569 size_t len;
570 static char nam[MNAMELEN + 1];
571
572 if ((delimp = strrchr(spec, ':')) != NULL) {
573 hostp = spec;
574 spec = delimp + 1;
575 } else if ((delimp = strrchr(spec, '@')) != NULL) {
576 warnx("path@server syntax is deprecated, use server:path");
577 hostp = delimp + 1;
578 } else {
579 warnx("no <host>:<dirpath> nfs-name");
580 return (0);
581 }
582 *delimp = '\0';
583
584 /*
585 * If there has been a trailing slash at mounttime it seems
586 * that some mountd implementations fail to remove the mount
587 * entries from their mountlist while unmounting.
588 */
589 for (speclen = strlen(spec);
590 speclen > 1 && spec[speclen - 1] == '/';
591 speclen--)
592 spec[speclen - 1] = '\0';
593 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
594 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
595 return (0);
596 }
597 /* Make both '@' and ':' notations equal */
598 if (*hostp != '\0') {
599 len = strlen(hostp);
600 memmove(nam, hostp, len);
601 nam[len] = ':';
602 memmove(nam + len + 1, spec, speclen);
603 nam[len + speclen + 1] = '\0';
604 }
605
606 /*
607 * Handle an internet host address and reverse resolve it if
608 * doing Kerberos.
609 */
610 bzero(&saddr, sizeof saddr);
611 saddr.sin_family = AF_INET;
612 saddr.sin_len = sizeof saddr;
cafd601b 613
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614 if (port_no != 0)
615 saddr.sin_port = htons(port_no);
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616
617 for (;;) {
618 int haserror = 0;
619
620 /*
621 * Adjust DNS timeouts so we do not linger in the foreground
622 * if we can be backgrounded.
623 */
624 switch(opflags & (BGRND | ISBGRND)) {
625 case BGRND:
626 _res.retry = 1;
627 _res.retrans = 1;
628 break;
629 case BGRND|ISBGRND:
630 _res.retry = 3;
631 _res.retrans = 3;
632 break;
633 }
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634 if (inet_pton(AF_INET, hostp, &iaddr) == 1) {
635 saddr.sin_addr = iaddr;
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636 } else if ((hp = gethostbyname(hostp)) != NULL) {
637 memmove(&saddr.sin_addr, hp->h_addr,
340240ff 638 MIN(hp->h_length, (int)sizeof(saddr.sin_addr)));
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639 } else {
640 warnx("can't get net id for host: %s", hostp);
641 opflags |= DIDWARN;
642 haserror = h_errno;
984263bc 643 }
984263bc 644#ifdef NFSKERB
cafd601b 645 if (haserror == 0 && (nfsargsp->flags & NFSMNT_KERB)) {
15b85273 646 if ((hp = gethostbyaddr(&saddr.sin_addr.s_addr,
cafd601b
MD
647 sizeof (u_long), AF_INET)) == NULL) {
648 warnx("can't reverse resolve net address");
649 opflags |= DIDWARN;
650 haserror = h_errno;
651 } else {
652 memmove(&saddr.sin_addr, hp->h_addr,
653 MIN(hp->h_length, sizeof(saddr.sin_addr)));
654 strncpy(inst, hp->h_name, INST_SZ);
655 inst[INST_SZ - 1] = '\0';
656 if (cp = strchr(inst, '.'))
657 *cp = '\0';
658 }
984263bc 659 }
984263bc 660#endif /* NFSKERB */
cafd601b
MD
661 /*
662 * If no error occured we do not have to retry again.
663 * Otherwise try to backgruond us if possible.
664 */
665 if (haserror == 0)
666 break;
667
668 switch(opflags & (BGRND | ISBGRND)) {
669 case BGRND:
670 if (haserror != EAI_AGAIN)
671 return(0);
672 /* recoverable error */
673 warnx("Cannot immediately mount %s:%s, backgrounding",
674 hostp, spec);
675 opflags |= DIDWARN;
676 opflags |= ISBGRND;
677 if (daemon(0, 0) != 0)
678 err(1, "daemon");
679 break;
680 default:
681 /*
682 * Already backgrounded or cannot be backgrounded.
683 */
684 if (haserror != EAI_AGAIN)
685 return(0);
686 break;
687 }
688 sleep(20);
689 endhostent();
690 }
691 if (opflags & DIDWARN) {
692 opflags &= ~DIDWARN;
693 warnx("successfully resolved %s after prior failures", hostp);
694 }
984263bc
MD
695
696 ret = TRYRET_LOCALERR;
697 for (;;) {
698 remoteerr = 0;
699 ret = nfs_tryproto(nfsargsp, &saddr, hostp, spec, &errstr);
700 if (ret == TRYRET_SUCCESS)
701 break;
702 if (ret != TRYRET_LOCALERR)
703 remoteerr = 1;
704 if ((opflags & ISBGRND) == 0)
705 fprintf(stderr, "%s\n", errstr);
706
707 /* Exit if all errors were local. */
708 if (!remoteerr)
709 exit(1);
710
711 /*
712 * If retrycnt == 0, we are to keep retrying forever.
713 * Otherwise decrement it, and exit if it hits zero.
714 */
715 if (retrycnt != 0 && --retrycnt == 0)
716 exit(1);
717
718 if ((opflags & (BGRND | ISBGRND)) == BGRND) {
719 warnx("Cannot immediately mount %s:%s, backgrounding",
720 hostp, spec);
721 opflags |= ISBGRND;
cafd601b 722 opflags |= DIDWARN;
984263bc
MD
723 if (daemon(0, 0) != 0)
724 err(1, "daemon");
725 }
cafd601b
MD
726 sleep(20);
727 }
728 if (opflags & DIDWARN) {
729 opflags &= ~DIDWARN;
730 warnx("successfully mounted %s after prior failures", spec);
984263bc
MD
731 }
732 nfsargsp->hostname = nam;
733 /* Add mounted filesystem to PATH_MOUNTTAB */
734 if (!add_mtab(hostp, spec))
735 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
736 return (1);
737}
738
739/*
740 * Try to set up the NFS arguments according to the address
741 * (and possibly port) specified by `sinp'.
742 *
743 * Returns TRYRET_SUCCESS if successful, or:
744 * TRYRET_TIMEOUT The server did not respond.
745 * TRYRET_REMOTEERR The server reported an error.
746 * TRYRET_LOCALERR Local failure.
747 *
748 * In all error cases, *errstr will be set to a statically-allocated string
749 * describing the error.
750 */
340240ff 751static enum tryret
984263bc
MD
752nfs_tryproto(struct nfs_args *nfsargsp, struct sockaddr_in *sinp, char *hostp,
753 char *spec, char **errstr)
754{
755 static char errbuf[256];
756 struct sockaddr_in sin, tmpsin;
757 struct nfhret nfhret;
758 struct timeval try;
759 struct rpc_err rpcerr;
760 CLIENT *clp;
761 int doconnect, nfsvers, mntvers, so;
340240ff 762 enum clnt_stat status;
984263bc
MD
763 enum mountmode trymntmode;
764
765 trymntmode = mountmode;
766 errbuf[0] = '\0';
767 *errstr = errbuf;
768 sin = tmpsin = *sinp;
769
770tryagain:
771 if (trymntmode == V2) {
772 nfsvers = 2;
773 mntvers = 1;
774 } else {
775 nfsvers = 3;
776 mntvers = 3;
777 }
778
779 /* Check that the server (nfsd) responds on the port we have chosen. */
780 try.tv_sec = 10;
781 try.tv_usec = 0;
782 so = RPC_ANYSOCK;
783 if (nfsargsp->sotype == SOCK_STREAM)
784 clp = clnttcp_create(&sin, RPCPROG_NFS, nfsvers, &so, 0, 0);
785 else
786 clp = clntudp_create(&sin, RPCPROG_NFS, nfsvers, try, &so);
787 if (clp == NULL) {
788 snprintf(errbuf, sizeof errbuf, "%s:%s: %s",
789 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS"));
790 return (returncode(rpc_createerr.cf_stat,
791 &rpc_createerr.cf_error));
792 }
793 if (nfsargsp->sotype == SOCK_DGRAM &&
794 !(nfsargsp->flags & NFSMNT_NOCONN)) {
795 /*
796 * Use connect(), to match what the kernel does. This
797 * catches cases where the server responds from the
798 * wrong source address.
799 */
800 doconnect = 1;
801 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) {
802 clnt_destroy(clp);
803 snprintf(errbuf, sizeof errbuf,
804 "%s:%s: CLSET_CONNECT failed", hostp, spec);
805 return (TRYRET_LOCALERR);
806 }
807 }
808
809 try.tv_sec = 10;
810 try.tv_usec = 0;
340240ff 811 status = clnt_call(clp, NFSPROC_NULL, xdr_void, NULL, xdr_void, NULL,
984263bc 812 try);
340240ff
JS
813 if (status != RPC_SUCCESS) {
814 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
984263bc
MD
815 clnt_destroy(clp);
816 trymntmode = V2;
817 goto tryagain;
818 }
819 clnt_geterr(clp, &rpcerr);
820 snprintf(errbuf, sizeof errbuf, "%s:%s: %s",
821 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL"));
822 clnt_destroy(clp);
340240ff 823 return (returncode(status, &rpcerr));
984263bc
MD
824 }
825 clnt_destroy(clp);
826
827 /* Send the RPCMNT_MOUNT RPC to get the root filehandle. */
828 tmpsin.sin_port = 0;
829 try.tv_sec = 10;
830 try.tv_usec = 0;
831 so = RPC_ANYSOCK;
832 if (mnttcp_ok && nfsargsp->sotype == SOCK_STREAM)
833 clp = clnttcp_create(&tmpsin, RPCPROG_MNT, mntvers, &so, 0, 0);
834 else
835 clp = clntudp_create(&tmpsin, RPCPROG_MNT, mntvers, try, &so);
836 if (clp == NULL) {
837 snprintf(errbuf, sizeof errbuf, "%s:%s: %s",
838 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create"));
839 return (returncode(rpc_createerr.cf_stat,
840 &rpc_createerr.cf_error));
841 }
842 clp->cl_auth = authunix_create_default();
843 if (nfsargsp->flags & NFSMNT_KERB)
844 nfhret.auth = RPCAUTH_KERB4;
845 else
846 nfhret.auth = RPCAUTH_UNIX;
847 nfhret.vers = mntvers;
340240ff 848 status = clnt_call(clp, RPCMNT_MOUNT, xdr_dir, spec, xdr_fh, &nfhret,
984263bc
MD
849 try);
850 auth_destroy(clp->cl_auth);
340240ff
JS
851 if (status != RPC_SUCCESS) {
852 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
984263bc
MD
853 clnt_destroy(clp);
854 trymntmode = V2;
855 goto tryagain;
856 }
857 clnt_geterr(clp, &rpcerr);
858 snprintf(errbuf, sizeof errbuf, "%s:%s: %s",
859 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT"));
860 clnt_destroy(clp);
340240ff 861 return (returncode(status, &rpcerr));
984263bc
MD
862 }
863 clnt_destroy(clp);
864
865 if (nfhret.stat != 0) {
866 snprintf(errbuf, sizeof errbuf, "%s:%s: %s",
867 hostp, spec, strerror(nfhret.stat));
868 return (TRYRET_REMOTEERR);
869 }
870
871 /*
872 * Store the filehandle and server address in nfsargsp, making
873 * sure to copy any locally allocated structures.
874 */
875 nfsargsp->addrlen = sin.sin_len;
876 nfsargsp->addr = malloc(nfsargsp->addrlen);
877 nfsargsp->fhsize = nfhret.fhsize;
878 nfsargsp->fh = malloc(nfsargsp->fhsize);
879 if (nfsargsp->addr == NULL || nfsargsp->fh == NULL)
880 err(1, "malloc");
881 bcopy(&sin, nfsargsp->addr, nfsargsp->addrlen);
882 bcopy(nfhret.nfh, nfsargsp->fh, nfsargsp->fhsize);
883
884 if (nfsvers == 3)
885 nfsargsp->flags |= NFSMNT_NFSV3;
886 else
887 nfsargsp->flags &= ~NFSMNT_NFSV3;
888
889 return (TRYRET_SUCCESS);
890}
891
892/*
893 * Catagorise a RPC return status and error into an `enum tryret'
894 * return code.
895 */
340240ff
JS
896static enum tryret
897returncode(enum clnt_stat status, struct rpc_err *rpcerr)
984263bc 898{
340240ff 899 switch (status) {
984263bc
MD
900 case RPC_TIMEDOUT:
901 return (TRYRET_TIMEOUT);
902 case RPC_PMAPFAILURE:
903 case RPC_PROGNOTREGISTERED:
904 case RPC_PROGVERSMISMATCH:
905 /* XXX, these can be local or remote. */
906 case RPC_CANTSEND:
907 case RPC_CANTRECV:
908 return (TRYRET_REMOTEERR);
909 case RPC_SYSTEMERROR:
910 switch (rpcerr->re_errno) {
911 case ETIMEDOUT:
912 return (TRYRET_TIMEOUT);
913 case ENOMEM:
914 break;
915 default:
916 return (TRYRET_REMOTEERR);
917 }
918 /* FALLTHROUGH */
919 default:
920 break;
921 }
922 return (TRYRET_LOCALERR);
923}
924
925/*
926 * xdr routines for mount rpc's
927 */
340240ff 928static int
b5744197 929xdr_dir(XDR *xdrsp, char *dirp)
984263bc
MD
930{
931 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
932}
933
340240ff 934static int
02fe642c 935xdr_fh(XDR *xdrsp, struct nfhret *np)
984263bc 936{
02fe642c 937 int i;
984263bc
MD
938 long auth, authcnt, authfnd = 0;
939
940 if (!xdr_u_long(xdrsp, &np->stat))
941 return (0);
942 if (np->stat)
943 return (1);
944 switch (np->vers) {
945 case 1:
946 np->fhsize = NFSX_V2FH;
947 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
948 case 3:
949 if (!xdr_long(xdrsp, &np->fhsize))
950 return (0);
951 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
952 return (0);
953 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
954 return (0);
955 if (!xdr_long(xdrsp, &authcnt))
956 return (0);
957 for (i = 0; i < authcnt; i++) {
958 if (!xdr_long(xdrsp, &auth))
959 return (0);
960 if (auth == np->auth)
961 authfnd++;
962 }
963 /*
964 * Some servers, such as DEC's OSF/1 return a nil authenticator
965 * list to indicate RPCAUTH_UNIX.
966 */
967 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
968 np->stat = EAUTH;
969 return (1);
970 };
971 return (0);
972}
973
340240ff 974static void
b5744197 975usage(void)
984263bc 976{
7cee7052 977 fprintf(stderr, "%s\n%s\n%s\n%s\n",
e07fef60
MD
978"usage: mount_nfs [-23KNPTUbcdils] [-D deadthresh] [-I readdirsize]",
979" [-R retrycnt] [-a maxreadahead]",
984263bc
MD
980" [-g maxgroups] [-m realm] [-o options] [-r readsize]",
981" [-t timeout] [-w writesize] [-x retrans] rhost:path node");
982 exit(1);
983}