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freebsd-skq/sbin/mount_nfs/mount_nfs.c
Andrey A. Chernov deffdffafa - Back out the last (wrong) commit, and readd a modified version 
of pingnfsserver(). The pingnfsport() function is now called everytime.
  If we don't get RPC_SUCCESS or RPC_PROGVERSMISMATCH back, there's
  something wrong with the NFS server and we just exit.

- Fix cfs mount on IPv4-only machines

- Fixed the looping when we did not run background mode.

- Fixed a getnameinfo() call with uninitialized adress.
  This is a NetBSD bug I didn't notified :-( Thanks Ian !

- Added some #ifdef NFSKERB

- Removed some unused variables.

- Fixed idention

- Remove unnecessary ":" in openlog ident

Submitted by:	Martin Blapp <mb@imp.ch>
Reviewed by:	Ian Dowse <iedowse@maths.tcd.ie>
2001-03-31 20:45:21 +00:00

956 lines
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/*
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1992, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syslog.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>
#ifdef NFSKERB
#include <kerberosIV/des.h>
#include <kerberosIV/krb.h>
#endif
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nqnfs.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <sysexits.h>
#include <unistd.h>
#include "mntopts.h"
#include "mounttab.h"
#define ALTF_BG 0x1
#define ALTF_NOCONN 0x2
#define ALTF_DUMBTIMR 0x4
#define ALTF_INTR 0x8
#define ALTF_KERB 0x10
#define ALTF_NFSV3 0x20
#define ALTF_RDIRPLUS 0x40
#define ALTF_MNTUDP 0x80
#define ALTF_RESVPORT 0x100
#define ALTF_SEQPACKET 0x200
#define ALTF_NQNFS 0x400
#define ALTF_SOFT 0x800
#define ALTF_TCP 0x1000
#define ALTF_PORT 0x2000
#define ALTF_NFSV2 0x4000
#define ALTF_ACREGMIN 0x8000
#define ALTF_ACREGMAX 0x10000
#define ALTF_ACDIRMIN 0x20000
#define ALTF_ACDIRMAX 0x40000
struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_FORCE,
MOPT_UPDATE,
MOPT_ASYNC,
{ "bg", 0, ALTF_BG, 1 },
{ "conn", 1, ALTF_NOCONN, 1 },
{ "dumbtimer", 0, ALTF_DUMBTIMR, 1 },
{ "intr", 0, ALTF_INTR, 1 },
#ifdef NFSKERB
{ "kerb", 0, ALTF_KERB, 1 },
#endif
{ "nfsv3", 0, ALTF_NFSV3, 1 },
{ "rdirplus", 0, ALTF_RDIRPLUS, 1 },
{ "mntudp", 0, ALTF_MNTUDP, 1 },
{ "resvport", 0, ALTF_RESVPORT, 1 },
{ "nqnfs", 0, ALTF_NQNFS, 1 },
{ "soft", 0, ALTF_SOFT, 1 },
{ "tcp", 0, ALTF_TCP, 1 },
{ "port=", 0, ALTF_PORT, 1 },
{ "nfsv2", 0, ALTF_NFSV2, 1 },
{ "acregmin=", 0, ALTF_ACREGMIN, 1 },
{ "acregmax=", 0, ALTF_ACREGMAX, 1 },
{ "acdirmin=", 0, ALTF_ACDIRMIN, 1 },
{ "acdirmax=", 0, ALTF_ACDIRMAX, 1 },
{ NULL }
};
struct nfs_args nfsdefargs = {
NFS_ARGSVERSION,
(struct sockaddr *)0,
sizeof (struct sockaddr_in),
SOCK_DGRAM,
0,
(u_char *)0,
0,
NFSMNT_RESVPORT,
NFS_WSIZE,
NFS_RSIZE,
NFS_READDIRSIZE,
10,
NFS_RETRANS,
NFS_MAXGRPS,
NFS_DEFRAHEAD,
NQ_DEFLEASE,
NQ_DEADTHRESH,
(char *)0,
/* args version 4 */
NFS_MINATTRTIMO,
NFS_MAXATTRTIMO,
NFS_MINDIRATTRTIMO,
NFS_MAXDIRATTRTIMO,
};
struct nfhret {
u_long stat;
long vers;
long auth;
long fhsize;
u_char nfh[NFSX_V3FHMAX];
};
#define DEF_RETRY 10000
#define BGRND 1
#define ISBGRND 2
int retrycnt = DEF_RETRY;
int opflags = 0;
int nfsproto = IPPROTO_UDP;
int mnttcp_ok = 1;
u_short port_no = 0;
enum {
ANY,
V2,
V3
} mountmode = ANY;
#ifdef NFSKERB
char inst[INST_SZ];
char realm[REALM_SZ];
struct {
u_long kind;
KTEXT_ST kt;
} ktick;
struct nfsrpc_nickverf kverf;
struct nfsrpc_fullblock kin, kout;
NFSKERBKEY_T kivec;
CREDENTIALS kcr;
struct timeval ktv;
NFSKERBKEYSCHED_T kerb_keysched;
#endif
int getnfsargs __P((char *, struct nfs_args *));
/* void set_rpc_maxgrouplist __P((int)); */
void usage __P((void)) __dead2;
int xdr_dir __P((XDR *, char *));
int xdr_fh __P((XDR *, struct nfhret *));
enum clnt_stat pingnfsport(int, struct netconfig *, struct netbuf *);
/*
* Used to set mount flags with getmntopts. Call with dir=TRUE to
* initialize altflags from the current mount flags. Call with
* dir=FALSE to update mount flags with the new value of altflags after
* the call to getmntopts.
*/
static void
set_flags(int* altflags, int* nfsflags, int dir)
{
#define F2(af, nf) \
if (dir) { \
if (*nfsflags & NFSMNT_##nf) \
*altflags |= ALTF_##af; \
else \
*altflags &= ~ALTF_##af; \
} else { \
if (*altflags & ALTF_##af) \
*nfsflags |= NFSMNT_##nf; \
else \
*nfsflags &= ~NFSMNT_##nf; \
}
#define F(f) F2(f,f)
F(NOCONN);
F(DUMBTIMR);
F2(INTR, INT);
#ifdef NFSKERB
F(KERB);
#endif
F(RDIRPLUS);
F(RESVPORT);
F(NQNFS);
F(SOFT);
#undef F
#undef F2
}
int
main(argc, argv)
int argc;
char *argv[];
{
register int c;
register struct nfs_args *nfsargsp;
struct nfs_args nfsargs;
struct nfsd_cargs ncd;
int mntflags, altflags, i, nfssvc_flag, num;
char *name, *p, *spec;
char mntpath[MAXPATHLEN];
struct vfsconf vfc;
int error = 0;
#ifdef NFSKERB
uid_t last_ruid;
last_ruid = -1;
(void)strcpy(realm, KRB_REALM);
if (sizeof (struct nfsrpc_nickverf) != RPCX_NICKVERF ||
sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK ||
((char *)&ktick.kt) - ((char *)&ktick) != NFSX_UNSIGNED ||
((char *)ktick.kt.dat) - ((char *)&ktick) != 2 * NFSX_UNSIGNED)
fprintf(stderr, "Yikes! NFSKERB structs not packed!!\n");
#endif /* NFSKERB */
retrycnt = DEF_RETRY;
mntflags = 0;
altflags = 0;
nfsargs = nfsdefargs;
nfsargsp = &nfsargs;
while ((c = getopt(argc, argv,
"23a:bcdD:g:I:iKL:lm:No:PpqR:r:sTt:w:x:U")) != -1)
switch (c) {
case '2':
mountmode = V2;
break;
case '3':
mountmode = V3;
break;
case 'a':
num = strtol(optarg, &p, 10);
if (*p || num < 0)
errx(1, "illegal -a value -- %s", optarg);
nfsargsp->readahead = num;
nfsargsp->flags |= NFSMNT_READAHEAD;
break;
case 'b':
opflags |= BGRND;
break;
case 'c':
nfsargsp->flags |= NFSMNT_NOCONN;
break;
case 'D':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -D value -- %s", optarg);
nfsargsp->deadthresh = num;
nfsargsp->flags |= NFSMNT_DEADTHRESH;
break;
case 'd':
nfsargsp->flags |= NFSMNT_DUMBTIMR;
break;
#if 0 /* XXXX */
case 'g':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -g value -- %s", optarg);
set_rpc_maxgrouplist(num);
nfsargsp->maxgrouplist = num;
nfsargsp->flags |= NFSMNT_MAXGRPS;
break;
#endif
case 'I':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -I value -- %s", optarg);
nfsargsp->readdirsize = num;
nfsargsp->flags |= NFSMNT_READDIRSIZE;
break;
case 'i':
nfsargsp->flags |= NFSMNT_INT;
break;
#ifdef NFSKERB
case 'K':
nfsargsp->flags |= NFSMNT_KERB;
break;
#endif
case 'L':
num = strtol(optarg, &p, 10);
if (*p || num < 2)
errx(1, "illegal -L value -- %s", optarg);
nfsargsp->leaseterm = num;
nfsargsp->flags |= NFSMNT_LEASETERM;
break;
case 'l':
nfsargsp->flags |= NFSMNT_RDIRPLUS;
break;
#ifdef NFSKERB
case 'm':
(void)strncpy(realm, optarg, REALM_SZ - 1);
realm[REALM_SZ - 1] = '\0';
break;
#endif
case 'N':
nfsargsp->flags &= ~NFSMNT_RESVPORT;
break;
case 'o':
altflags = 0;
set_flags(&altflags, &nfsargsp->flags, TRUE);
if (mountmode == V2)
altflags |= ALTF_NFSV2;
else if (mountmode == V3)
altflags |= ALTF_NFSV3;
getmntopts(optarg, mopts, &mntflags, &altflags);
set_flags(&altflags, &nfsargsp->flags, FALSE);
/*
* Handle altflags which don't map directly to
* mount flags.
*/
if(altflags & ALTF_BG)
opflags |= BGRND;
if(altflags & ALTF_MNTUDP)
mnttcp_ok = 0;
if(altflags & ALTF_TCP) {
nfsargsp->sotype = SOCK_STREAM;
nfsproto = IPPROTO_TCP;
}
if(altflags & ALTF_PORT)
port_no = atoi(strstr(optarg, "port=") + 5);
mountmode = ANY;
if(altflags & ALTF_NFSV2)
mountmode = V2;
if(altflags & ALTF_NFSV3)
mountmode = V3;
if(altflags & ALTF_ACREGMIN)
nfsargsp->acregmin = atoi(strstr(optarg,
"acregmin=") + 9);
if(altflags & ALTF_ACREGMAX)
nfsargsp->acregmax = atoi(strstr(optarg,
"acregmax=") + 9);
if(altflags & ALTF_ACDIRMIN)
nfsargsp->acdirmin = atoi(strstr(optarg,
"acdirmin=") + 9);
if(altflags & ALTF_ACDIRMAX)
nfsargsp->acdirmax = atoi(strstr(optarg,
"acdirmax=") + 9);
break;
case 'P':
/* obsolete for NFSMNT_RESVPORT, now default */
break;
case 'q':
mountmode = V3;
nfsargsp->flags |= NFSMNT_NQNFS;
break;
case 'R':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -R value -- %s", optarg);
retrycnt = num;
break;
case 'r':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -r value -- %s", optarg);
nfsargsp->rsize = num;
nfsargsp->flags |= NFSMNT_RSIZE;
break;
case 's':
nfsargsp->flags |= NFSMNT_SOFT;
break;
case 'T':
nfsargsp->sotype = SOCK_STREAM;
nfsproto = IPPROTO_TCP;
break;
case 't':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -t value -- %s", optarg);
nfsargsp->timeo = num;
nfsargsp->flags |= NFSMNT_TIMEO;
break;
case 'w':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -w value -- %s", optarg);
nfsargsp->wsize = num;
nfsargsp->flags |= NFSMNT_WSIZE;
break;
case 'x':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -x value -- %s", optarg);
nfsargsp->retrans = num;
nfsargsp->flags |= NFSMNT_RETRANS;
break;
case 'U':
mnttcp_ok = 0;
break;
default:
usage();
break;
}
argc -= optind;
argv += optind;
if (argc != 2) {
usage();
/* NOTREACHED */
}
spec = *argv++;
name = *argv;
if (!getnfsargs(spec, nfsargsp))
exit(1);
/* resolve the mountpoint with realpath(3) */
(void)checkpath(name, mntpath);
error = getvfsbyname("nfs", &vfc);
if (error && vfsisloadable("nfs")) {
if(vfsload("nfs"))
err(EX_OSERR, "vfsload(nfs)");
endvfsent(); /* clear cache */
error = getvfsbyname("nfs", &vfc);
}
if (error)
errx(EX_OSERR, "nfs filesystem is not available");
if (mount(vfc.vfc_name, mntpath, mntflags, nfsargsp))
err(1, "%s", mntpath);
if (nfsargsp->flags & (NFSMNT_NQNFS | NFSMNT_KERB)) {
if ((opflags & ISBGRND) == 0) {
if ((i = fork())) {
if (i == -1)
err(1, "nqnfs 1");
exit(0);
}
(void) setsid();
(void) close(STDIN_FILENO);
(void) close(STDOUT_FILENO);
(void) close(STDERR_FILENO);
(void) chdir("/");
}
openlog("mount_nfs", LOG_PID, LOG_DAEMON);
nfssvc_flag = NFSSVC_MNTD;
ncd.ncd_dirp = mntpath;
while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) {
if (errno != ENEEDAUTH) {
syslog(LOG_ERR, "nfssvc err %m");
continue;
}
nfssvc_flag =
NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL;
#ifdef NFSKERB
/*
* Set up as ncd_authuid for the kerberos call.
* Must set ruid to ncd_authuid and reset the
* ticket name iff ncd_authuid is not the same
* as last time, so that the right ticket file
* is found.
* Get the Kerberos credential structure so that
* we have the session key and get a ticket for
* this uid.
* For more info see the IETF Draft "Authentication
* in ONC RPC".
*/
if (ncd.ncd_authuid != last_ruid) {
char buf[512];
(void)sprintf(buf, "%s%d",
TKT_ROOT, ncd.ncd_authuid);
krb_set_tkt_string(buf);
last_ruid = ncd.ncd_authuid;
}
setreuid(ncd.ncd_authuid, 0);
kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr);
if (kret == RET_NOTKT) {
kret = get_ad_tkt(NFS_KERBSRV, inst, realm,
DEFAULT_TKT_LIFE);
if (kret == KSUCCESS)
kret = krb_get_cred(NFS_KERBSRV, inst, realm,
&kcr);
}
if (kret == KSUCCESS)
kret = krb_mk_req(&ktick.kt, NFS_KERBSRV, inst,
realm, 0);
/*
* Fill in the AKN_FULLNAME authenticator and verifier.
* Along with the Kerberos ticket, we need to build
* the timestamp verifier and encrypt it in CBC mode.
*/
if (kret == KSUCCESS &&
ktick.kt.length <= (RPCAUTH_MAXSIZ-3*NFSX_UNSIGNED)
&& gettimeofday(&ktv, (struct timezone *)0) == 0) {
ncd.ncd_authtype = RPCAUTH_KERB4;
ncd.ncd_authstr = (u_char *)&ktick;
ncd.ncd_authlen = nfsm_rndup(ktick.kt.length) +
3 * NFSX_UNSIGNED;
ncd.ncd_verfstr = (u_char *)&kverf;
ncd.ncd_verflen = sizeof (kverf);
memmove(ncd.ncd_key, kcr.session,
sizeof (kcr.session));
kin.t1 = htonl(ktv.tv_sec);
kin.t2 = htonl(ktv.tv_usec);
kin.w1 = htonl(NFS_KERBTTL);
kin.w2 = htonl(NFS_KERBTTL - 1);
bzero((caddr_t)kivec, sizeof (kivec));
/*
* Encrypt kin in CBC mode using the session
* key in kcr.
*/
XXX
/*
* Finally, fill the timestamp verifier into the
* authenticator and verifier.
*/
ktick.kind = htonl(RPCAKN_FULLNAME);
kverf.kind = htonl(RPCAKN_FULLNAME);
NFS_KERBW1(ktick.kt) = kout.w1;
ktick.kt.length = htonl(ktick.kt.length);
kverf.verf.t1 = kout.t1;
kverf.verf.t2 = kout.t2;
kverf.verf.w2 = kout.w2;
nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH;
}
setreuid(0, 0);
#endif /* NFSKERB */
}
}
exit(0);
}
int
getnfsargs(spec, nfsargsp)
char *spec;
struct nfs_args *nfsargsp;
{
CLIENT *clp;
struct addrinfo hints, *ai_nfs, *ai;
int ecode;
#ifdef NFSKERB
char host[NI_MAXHOST], serv[NI_MAXSERV];
#endif
static struct netbuf nfs_nb;
static struct sockaddr_storage nfs_ss;
struct netconfig *nconf;
char *netid;
struct timeval pertry, try;
enum clnt_stat clnt_stat;
int so, i, nfsvers, mntvers, orgcnt, speclen;
char *hostp, *delimp;
#ifdef NFSKERB
char *cp;
#endif
size_t len;
static struct nfhret nfhret;
static char nam[MNAMELEN + 1];
so = i = 0;
if ((delimp = strrchr(spec, ':')) != NULL) {
hostp = spec;
spec = delimp + 1;
} else if ((delimp = strrchr(spec, '@')) != NULL) {
warnx("path@server syntax is deprecated, use server:path");
hostp = delimp + 1;
} else {
warnx("no <host>:<dirpath> nfs-name");
return (0);
}
*delimp = '\0';
/*
* If there has been a trailing slash at mounttime it seems
* that some mountd implementations fail to remove the mount
* entries from their mountlist while unmounting.
*/
for (speclen = strlen(spec);
speclen > 1 && spec[speclen - 1] == '/';
speclen--)
spec[speclen - 1] = '\0';
if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
return (0);
}
/* Make both '@' and ':' notations equal */
if (*hostp != '\0') {
len = strlen(hostp);
memmove(nam, hostp, len);
nam[len] = ':';
memmove(nam + len + 1, spec, speclen);
nam[len + speclen + 1] = '\0';
}
/*
* Handle an internet host address and reverse resolve it if
* doing Kerberos.
*/
memset(&hints, 0, sizeof hints);
hints.ai_flags = AI_NUMERICHOST;
hints.ai_socktype = nfsargsp->sotype;
if (getaddrinfo(hostp, "nfs", &hints, &ai_nfs) == 0) {
#ifdef NFSKERB
if ((nfsargsp->flags & NFSMNT_KERB)) {
hints.ai_flags = 0;
if (getnameinfo(ai_nfs->ai_addr, ai_nfs->ai_addrlen,
host, sizeof host, serv, sizeof serv, 0) != 0) {
warnx("can't reverse resolve net address");
return (0);
}
hostp = host;
}
#endif /* NFSKERB */
} else {
hints.ai_flags = 0;
if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) {
warnx("can't get net id for host/nfs: %s",
gai_strerror(ecode));
return (0);
}
}
#ifdef NFSKERB
if (nfsargsp->flags & NFSMNT_KERB) {
strncpy(inst, hp->h_name, INST_SZ);
inst[INST_SZ - 1] = '\0';
if (cp = strchr(inst, '.'))
*cp = '\0';
}
#endif /* NFSKERB */
orgcnt = retrycnt;
nfhret.stat = EACCES; /* Mark not yet successful */
ai = ai_nfs;
while (ai != NULL) {
/*
* XXX. Nead a generic (family, type, proto) -> nconf interface.
* __rpc_*2nconf exist, maybe they should be exported.
*/
if (nfsargsp->sotype == SOCK_STREAM) {
if (ai->ai_family == AF_INET6)
netid = "tcp6";
else
netid = "tcp";
} else {
if (ai->ai_family == AF_INET6)
netid = "udp6";
else
netid = "udp";
}
nconf = getnetconfigent(netid);
tryagain:
retrycnt = orgcnt;
if (mountmode == ANY || mountmode == V3) {
nfsvers = 3;
mntvers = 3;
nfsargsp->flags |= NFSMNT_NFSV3;
} else {
nfsvers = 2;
mntvers = 1;
nfsargsp->flags &= ~NFSMNT_NFSV3;
}
while (retrycnt > 0) {
if (port_no != 0) {
if (ai_nfs->ai_family == AF_INET6) {
((struct sockaddr_in6 *)ai_nfs->
ai_addr)->sin6_port = htons(port_no);
nfs_nb.len =
sizeof(struct sockaddr_in6);
} else {
((struct sockaddr_in *)ai_nfs->
ai_addr)->sin_port = htons(port_no);
nfs_nb.len = sizeof(struct sockaddr_in);
}
memset(&nfs_ss, 0, sizeof(nfs_ss));
memcpy(&nfs_ss, ai_nfs->ai_addr, nfs_nb.len);
}
nfs_nb.buf = &nfs_ss;
nfs_nb.maxlen = sizeof nfs_ss;
if (port_no == 0 && !rpcb_getaddr(RPCPROG_NFS,
nfsvers, nconf, &nfs_nb, hostp)) {
switch (rpc_createerr.cf_stat) {
case RPC_SYSTEMERROR:
nfhret.stat =
rpc_createerr.cf_error.re_errno;
break;
case RPC_UNKNOWNPROTO:
nfhret.stat = EPROTONOSUPPORT;
break;
case RPC_PROGVERSMISMATCH:
if (mountmode == ANY) {
mountmode = V2;
goto tryagain;
} else {
errx(1,
"can't contact NFS server");
}
default:
}
if ((opflags & ISBGRND) == 0)
clnt_pcreateerror(
"mount_nfs: rpcbind on server");
}
/*
* Check if the nfs server supports this
* version of the protocol we want to use.
*/
clnt_stat = pingnfsport(nfsvers, nconf, &nfs_nb);
if (clnt_stat == RPC_PROGVERSMISMATCH) {
if (mountmode == ANY) {
mountmode = V2;
goto tryagain;
} else {
errx(1, "can't contact NFS server");
}
}
if (clnt_stat != RPC_SUCCESS)
errx(1, "can't contact NFS server");
pertry.tv_sec = 10;
pertry.tv_usec = 0;
/*
* XXX relies on clnt_tcp_create to bind
* to a reserved socket.
*/
clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers,
mnttcp_ok ? nconf : getnetconfigent("udp"));
if (clp == NULL) {
if ((opflags & ISBGRND) == 0)
clnt_pcreateerror("Cannot MNT RPC");
} else {
CLNT_CONTROL(clp, CLSET_RETRY_TIMEOUT,
(char *)&pertry);
clp->cl_auth = authsys_create_default();
try.tv_sec = 10;
try.tv_usec = 0;
if (nfsargsp->flags & NFSMNT_KERB)
nfhret.auth = RPCAUTH_KERB4;
else
nfhret.auth = RPCAUTH_UNIX;
nfhret.vers = mntvers;
clnt_stat = clnt_call(clp, RPCMNT_MOUNT,
xdr_dir, spec, xdr_fh, &nfhret, try);
if (clnt_stat != RPC_SUCCESS) {
if (clnt_stat == RPC_PROGVERSMISMATCH) {
if (mountmode == ANY) {
mountmode = V2;
goto tryagain;
} else {
errx(1, "%s",
clnt_sperror(clp,
"MNT RPC"));
}
}
if ((opflags & ISBGRND) == 0)
warnx("%s", clnt_sperror(clp,
"bad MNT RPC"));
} else {
retrycnt = 0;
}
auth_destroy(clp->cl_auth);
clnt_destroy(clp);
so = RPC_ANYSOCK;
}
}
if (--retrycnt > 0) {
if (opflags & BGRND) {
warnx("Cannot immediately mount %s:%s, "
"backgrounding", hostp, spec);
opflags &= ~BGRND;
if ((i = fork())) {
if (i == -1)
err(1, "nqnfs 2");
exit(0);
}
(void) setsid();
(void) close(STDIN_FILENO);
(void) close(STDOUT_FILENO);
(void) close(STDERR_FILENO);
(void) chdir("/");
opflags |= ISBGRND;
} else {
exit (1);
}
sleep(60);
}
if (nfhret.stat == 0)
break;
ai = ai->ai_next;
}
freeaddrinfo(ai_nfs);
if (nfhret.stat) {
if (opflags & ISBGRND)
exit(1);
warnx("can't access %s: %s", spec, strerror(nfhret.stat));
return (0);
}
{
nfsargsp->addr = (struct sockaddr *) nfs_nb.buf;
nfsargsp->addrlen = nfs_nb.len;
}
nfsargsp->fh = nfhret.nfh;
nfsargsp->fhsize = nfhret.fhsize;
nfsargsp->hostname = nam;
/* Add mounted filesystem to PATH_MOUNTTAB */
if (!add_mtab(hostp, spec))
warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
return (1);
}
/*
* xdr routines for mount rpc's
*/
int
xdr_dir(xdrsp, dirp)
XDR *xdrsp;
char *dirp;
{
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
}
int
xdr_fh(xdrsp, np)
XDR *xdrsp;
register struct nfhret *np;
{
register int i;
long auth, authcnt, authfnd = 0;
if (!xdr_u_long(xdrsp, &np->stat))
return (0);
if (np->stat)
return (1);
switch (np->vers) {
case 1:
np->fhsize = NFSX_V2FH;
return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
case 3:
if (!xdr_long(xdrsp, &np->fhsize))
return (0);
if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
return (0);
if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
return (0);
if (!xdr_long(xdrsp, &authcnt))
return (0);
for (i = 0; i < authcnt; i++) {
if (!xdr_long(xdrsp, &auth))
return (0);
if (auth == np->auth)
authfnd++;
}
/*
* Some servers, such as DEC's OSF/1 return a nil authenticator
* list to indicate RPCAUTH_UNIX.
*/
if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
np->stat = EAUTH;
return (1);
};
return (0);
}
/*
* Return RPC_SUCCESS if server responds on the port. We have to use
* clnt_tli_create and then call the null proc of the nfs-server, to
* be sure it works.
*/
enum clnt_stat
pingnfsport(version, nconf, nfs_nb)
int version;
struct netconfig *nconf;
struct netbuf *nfs_nb;
{
CLIENT *clp;
enum clnt_stat stat;
struct timeval try;
int so = RPC_ANYSOCK;
clp = clnt_tli_create(so, nconf, nfs_nb, RPCPROG_NFS,
version, 0, 0);
if (clp == NULL)
return rpc_createerr.cf_stat;
try.tv_sec = 10;
try.tv_usec = 0;
stat = clnt_call(clp, NFSPROC_NULL,
xdr_void, NULL, xdr_void, NULL, try);
clnt_destroy(clp);
return stat;
}
void
usage()
{
(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
"usage: mount_nfs [-23KNPTUbcdilqs] [-D deadthresh] [-I readdirsize]",
" [-L leaseterm] [-R retrycnt] [-a maxreadahead]",
" [-g maxgroups] [-m realm] [-o options] [-r readsize]",
" [-t timeout] [-w writesize] [-x retrans] rhost:path node");
exit(1);
}
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