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freebsd-dev/sbin/mount_nfs/mount_nfs.c
Warner Losh fbbd9655e5 Renumber copyright clause 4 
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00

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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. 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.
*/
#if 0
#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
static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/linker.h>
#include <sys/module.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syslog.h>
#include <sys/uio.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>
#include <rpcsvc/nfs_prot.h>
#include <rpcsvc/mount.h>
#include <nfsclient/nfs.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 <string.h>
#include <strings.h>
#include <sysexits.h>
#include <unistd.h>
#include "mntopts.h"
#include "mounttab.h"
/* Table for af,sotype -> netid conversions. */
static struct nc_protos {
const char *netid;
int af;
int sotype;
} nc_protos[] = {
{"udp", AF_INET, SOCK_DGRAM},
{"tcp", AF_INET, SOCK_STREAM},
{"udp6", AF_INET6, SOCK_DGRAM},
{"tcp6", AF_INET6, SOCK_STREAM},
{NULL, 0, 0}
};
struct nfhret {
u_long stat;
long vers;
long auth;
long fhsize;
u_char nfh[NFS3_FHSIZE];
};
#define BGRND 1
#define ISBGRND 2
#define OF_NOINET4 4
#define OF_NOINET6 8
static int retrycnt = -1;
static int opflags = 0;
static int nfsproto = IPPROTO_TCP;
static int mnttcp_ok = 1;
static int noconn = 0;
/* The 'portspec' is the server nfs port; NULL means look up via rpcbind. */
static const char *portspec = NULL;
static struct sockaddr *addr;
static int addrlen = 0;
static u_char *fh = NULL;
static int fhsize = 0;
static int secflavor = -1;
static int got_principal = 0;
static enum mountmode {
ANY,
V2,
V3,
V4
} mountmode = ANY;
/* Return codes for nfs_tryproto. */
enum tryret {
TRYRET_SUCCESS,
TRYRET_TIMEOUT, /* No response received. */
TRYRET_REMOTEERR, /* Error received from remote server. */
TRYRET_LOCALERR /* Local failure. */
};
static int sec_name_to_num(const char *sec);
static const char *sec_num_to_name(int num);
static int getnfsargs(char *, struct iovec **iov, int *iovlen);
/* void set_rpc_maxgrouplist(int); */
static struct netconfig *getnetconf_cached(const char *netid);
static const char *netidbytype(int af, int sotype);
static void usage(void) __dead2;
static int xdr_dir(XDR *, char *);
static int xdr_fh(XDR *, struct nfhret *);
static enum tryret nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec,
char **errstr, struct iovec **iov, int *iovlen);
static enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr);
int
main(int argc, char *argv[])
{
int c;
struct iovec *iov;
int num, iovlen;
char *mntname, *p, *spec, *tmp;
char mntpath[MAXPATHLEN], errmsg[255];
char hostname[MAXHOSTNAMELEN + 1], gssn[MAXHOSTNAMELEN + 50];
const char *fstype, *gssname;
iov = NULL;
iovlen = 0;
memset(errmsg, 0, sizeof(errmsg));
gssname = NULL;
fstype = strrchr(argv[0], '_');
if (fstype == NULL)
errx(EX_USAGE, "argv[0] must end in _fstype");
++fstype;
while ((c = getopt(argc, argv,
"23a:bcdD:g:I:iLlNo:PR:r:sTt:w:x:U")) != -1)
switch (c) {
case '2':
mountmode = V2;
break;
case '3':
mountmode = V3;
break;
case 'a':
printf("-a deprecated, use -o readahead=<value>\n");
build_iovec(&iov, &iovlen, "readahead", optarg, (size_t)-1);
break;
case 'b':
opflags |= BGRND;
break;
case 'c':
printf("-c deprecated, use -o noconn\n");
build_iovec(&iov, &iovlen, "noconn", NULL, 0);
noconn = 1;
break;
case 'D':
printf("-D deprecated, use -o deadthresh=<value>\n");
build_iovec(&iov, &iovlen, "deadthresh", optarg, (size_t)-1);
break;
case 'd':
printf("-d deprecated, use -o dumbtimer");
build_iovec(&iov, &iovlen, "dumbtimer", NULL, 0);
break;
case 'g':
printf("-g deprecated, use -o maxgroups");
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -g value -- %s", optarg);
//set_rpc_maxgrouplist(num);
build_iovec(&iov, &iovlen, "maxgroups", optarg, (size_t)-1);
break;
case 'I':
printf("-I deprecated, use -o readdirsize=<value>\n");
build_iovec(&iov, &iovlen, "readdirsize", optarg, (size_t)-1);
break;
case 'i':
printf("-i deprecated, use -o intr\n");
build_iovec(&iov, &iovlen, "intr", NULL, 0);
break;
case 'L':
printf("-L deprecated, use -o nolockd\n");
build_iovec(&iov, &iovlen, "nolockd", NULL, 0);
break;
case 'l':
printf("-l deprecated, -o rdirplus\n");
build_iovec(&iov, &iovlen, "rdirplus", NULL, 0);
break;
case 'N':
printf("-N deprecated, do not specify -o resvport\n");
break;
case 'o': {
int pass_flag_to_nmount;
char *opt = optarg;
while (opt) {
char *pval = NULL;
char *pnextopt = NULL;
const char *val = "";
pass_flag_to_nmount = 1;
pnextopt = strchr(opt, ',');
if (pnextopt != NULL) {
*pnextopt = '\0';
pnextopt++;
}
pval = strchr(opt, '=');
if (pval != NULL) {
*pval = '\0';
val = pval + 1;
}
if (strcmp(opt, "bg") == 0) {
opflags |= BGRND;
pass_flag_to_nmount=0;
} else if (strcmp(opt, "fg") == 0) {
/* same as not specifying -o bg */
pass_flag_to_nmount=0;
} else if (strcmp(opt, "gssname") == 0) {
pass_flag_to_nmount = 0;
gssname = val;
} else if (strcmp(opt, "mntudp") == 0) {
mnttcp_ok = 0;
nfsproto = IPPROTO_UDP;
} else if (strcmp(opt, "udp") == 0) {
nfsproto = IPPROTO_UDP;
} else if (strcmp(opt, "tcp") == 0) {
nfsproto = IPPROTO_TCP;
} else if (strcmp(opt, "noinet4") == 0) {
pass_flag_to_nmount=0;
opflags |= OF_NOINET4;
} else if (strcmp(opt, "noinet6") == 0) {
pass_flag_to_nmount=0;
opflags |= OF_NOINET6;
} else if (strcmp(opt, "noconn") == 0) {
noconn = 1;
} else if (strcmp(opt, "nfsv2") == 0) {
pass_flag_to_nmount=0;
mountmode = V2;
} else if (strcmp(opt, "nfsv3") == 0) {
mountmode = V3;
} else if (strcmp(opt, "nfsv4") == 0) {
pass_flag_to_nmount=0;
mountmode = V4;
fstype = "nfs";
nfsproto = IPPROTO_TCP;
if (portspec == NULL)
portspec = "2049";
} else if (strcmp(opt, "port") == 0) {
pass_flag_to_nmount=0;
asprintf(&tmp, "%d", atoi(val));
if (tmp == NULL)
err(1, "asprintf");
portspec = tmp;
} else if (strcmp(opt, "principal") == 0) {
got_principal = 1;
} else if (strcmp(opt, "proto") == 0) {
pass_flag_to_nmount=0;
if (strcmp(val, "tcp") == 0) {
nfsproto = IPPROTO_TCP;
opflags |= OF_NOINET6;
build_iovec(&iov, &iovlen,
"tcp", NULL, 0);
} else if (strcmp(val, "udp") == 0) {
mnttcp_ok = 0;
nfsproto = IPPROTO_UDP;
opflags |= OF_NOINET6;
build_iovec(&iov, &iovlen,
"udp", NULL, 0);
} else if (strcmp(val, "tcp6") == 0) {
nfsproto = IPPROTO_TCP;
opflags |= OF_NOINET4;
build_iovec(&iov, &iovlen,
"tcp", NULL, 0);
} else if (strcmp(val, "udp6") == 0) {
mnttcp_ok = 0;
nfsproto = IPPROTO_UDP;
opflags |= OF_NOINET4;
build_iovec(&iov, &iovlen,
"udp", NULL, 0);
} else {
errx(1,
"illegal proto value -- %s",
val);
}
} else if (strcmp(opt, "sec") == 0) {
/*
* Don't add this option to
* the iovec yet - we will
* negotiate which sec flavor
* to use with the remote
* mountd.
*/
pass_flag_to_nmount=0;
secflavor = sec_name_to_num(val);
if (secflavor < 0) {
errx(1,
"illegal sec value -- %s",
val);
}
} else if (strcmp(opt, "retrycnt") == 0) {
pass_flag_to_nmount=0;
num = strtol(val, &p, 10);
if (*p || num < 0)
errx(1, "illegal retrycnt value -- %s", val);
retrycnt = num;
} else if (strcmp(opt, "maxgroups") == 0) {
num = strtol(val, &p, 10);
if (*p || num <= 0)
errx(1, "illegal maxgroups value -- %s", val);
//set_rpc_maxgrouplist(num);
} else if (strcmp(opt, "vers") == 0) {
num = strtol(val, &p, 10);
if (*p || num <= 0)
errx(1, "illegal vers value -- "
"%s", val);
switch (num) {
case 2:
mountmode = V2;
break;
case 3:
mountmode = V3;
build_iovec(&iov, &iovlen,
"nfsv3", NULL, 0);
break;
case 4:
mountmode = V4;
fstype = "nfs";
nfsproto = IPPROTO_TCP;
if (portspec == NULL)
portspec = "2049";
break;
default:
errx(1, "illegal nfs version "
"value -- %s", val);
}
pass_flag_to_nmount=0;
}
if (pass_flag_to_nmount) {
build_iovec(&iov, &iovlen, opt,
__DECONST(void *, val),
strlen(val) + 1);
}
opt = pnextopt;
}
}
break;
case 'P':
/* obsolete for -o noresvport now default */
printf("-P deprecated, use -o noresvport\n");
build_iovec(&iov, &iovlen, "noresvport", NULL, 0);
break;
case 'R':
printf("-R deprecated, use -o retrycnt=<retrycnt>\n");
num = strtol(optarg, &p, 10);
if (*p || num < 0)
errx(1, "illegal -R value -- %s", optarg);
retrycnt = num;
break;
case 'r':
printf("-r deprecated, use -o rsize=<rsize>\n");
build_iovec(&iov, &iovlen, "rsize", optarg, (size_t)-1);
break;
case 's':
printf("-s deprecated, use -o soft\n");
build_iovec(&iov, &iovlen, "soft", NULL, 0);
break;
case 'T':
nfsproto = IPPROTO_TCP;
printf("-T deprecated, use -o tcp\n");
break;
case 't':
printf("-t deprecated, use -o timeout=<value>\n");
build_iovec(&iov, &iovlen, "timeout", optarg, (size_t)-1);
break;
case 'w':
printf("-w deprecated, use -o wsize=<value>\n");
build_iovec(&iov, &iovlen, "wsize", optarg, (size_t)-1);
break;
case 'x':
printf("-x deprecated, use -o retrans=<value>\n");
build_iovec(&iov, &iovlen, "retrans", optarg, (size_t)-1);
break;
case 'U':
printf("-U deprecated, use -o mntudp\n");
mnttcp_ok = 0;
nfsproto = IPPROTO_UDP;
build_iovec(&iov, &iovlen, "mntudp", NULL, 0);
break;
default:
usage();
break;
}
argc -= optind;
argv += optind;
if (argc != 2) {
usage();
/* NOTREACHED */
}
spec = *argv++;
mntname = *argv;
if (retrycnt == -1)
/* The default is to keep retrying forever. */
retrycnt = 0;
/*
* If the fstye is "oldnfs", run the old NFS client unless the
* "nfsv4" option was specified.
*/
if (strcmp(fstype, "nfs") == 0) {
if (modfind("nfscl") < 0) {
/* Not present in kernel, try loading it */
if (kldload("nfscl") < 0 ||
modfind("nfscl") < 0)
errx(1, "nfscl is not available");
}
}
/*
* Add the fqdn to the gssname, as required.
*/
if (gssname != NULL) {
if (strchr(gssname, '@') == NULL &&
gethostname(hostname, MAXHOSTNAMELEN) == 0) {
snprintf(gssn, sizeof (gssn), "%s@%s", gssname,
hostname);
gssname = gssn;
}
build_iovec(&iov, &iovlen, "gssname",
__DECONST(void *, gssname), strlen(gssname) + 1);
}
if (!getnfsargs(spec, &iov, &iovlen))
exit(1);
/* resolve the mountpoint with realpath(3) */
if (checkpath(mntname, mntpath) != 0)
err(1, "%s", mntpath);
build_iovec(&iov, &iovlen, "fstype",
__DECONST(void *, fstype), (size_t)-1);
build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
if (nmount(iov, iovlen, 0))
err(1, "nmount: %s%s%s", mntpath, errmsg[0] ? ", " : "",
errmsg);
exit(0);
}
static int
sec_name_to_num(const char *sec)
{
if (!strcmp(sec, "krb5"))
return (RPCSEC_GSS_KRB5);
if (!strcmp(sec, "krb5i"))
return (RPCSEC_GSS_KRB5I);
if (!strcmp(sec, "krb5p"))
return (RPCSEC_GSS_KRB5P);
if (!strcmp(sec, "sys"))
return (AUTH_SYS);
return (-1);
}
static const char *
sec_num_to_name(int flavor)
{
switch (flavor) {
case RPCSEC_GSS_KRB5:
return ("krb5");
case RPCSEC_GSS_KRB5I:
return ("krb5i");
case RPCSEC_GSS_KRB5P:
return ("krb5p");
case AUTH_SYS:
return ("sys");
}
return (NULL);
}
static int
getnfsargs(char *spec, struct iovec **iov, int *iovlen)
{
struct addrinfo hints, *ai_nfs, *ai;
enum tryret ret;
int ecode, speclen, remoteerr, offset, have_bracket = 0;
char *hostp, *delimp, *errstr;
size_t len;
static char nam[MNAMELEN + 1], pname[MAXHOSTNAMELEN + 5];
if (*spec == '[' && (delimp = strchr(spec + 1, ']')) != NULL &&
*(delimp + 1) == ':') {
hostp = spec + 1;
spec = delimp + 2;
have_bracket = 1;
} else 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);
offset = 0;
if (have_bracket)
nam[offset++] = '[';
memmove(nam + offset, hostp, len);
if (have_bracket)
nam[len + offset++] = ']';
nam[len + offset++] = ':';
memmove(nam + len + offset, spec, speclen);
nam[len + speclen + offset] = '\0';
}
/*
* Handle an internet host address.
*/
memset(&hints, 0, sizeof hints);
hints.ai_flags = AI_NUMERICHOST;
if (nfsproto == IPPROTO_TCP)
hints.ai_socktype = SOCK_STREAM;
else if (nfsproto == IPPROTO_UDP)
hints.ai_socktype = SOCK_DGRAM;
if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) {
hints.ai_flags = AI_CANONNAME;
if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs))
!= 0) {
if (portspec == NULL)
errx(1, "%s: %s", hostp, gai_strerror(ecode));
else
errx(1, "%s:%s: %s", hostp, portspec,
gai_strerror(ecode));
return (0);
}
/*
* For a Kerberized nfs mount where the "principal"
* argument has not been set, add it here.
*/
if (got_principal == 0 && secflavor != AUTH_SYS &&
ai_nfs->ai_canonname != NULL) {
snprintf(pname, sizeof (pname), "nfs@%s",
ai_nfs->ai_canonname);
build_iovec(iov, iovlen, "principal", pname,
strlen(pname) + 1);
}
}
ret = TRYRET_LOCALERR;
for (;;) {
/*
* Try each entry returned by getaddrinfo(). Note the
* occurrence of remote errors by setting `remoteerr'.
*/
remoteerr = 0;
for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) {
if ((ai->ai_family == AF_INET6) &&
(opflags & OF_NOINET6))
continue;
if ((ai->ai_family == AF_INET) &&
(opflags & OF_NOINET4))
continue;
ret = nfs_tryproto(ai, hostp, spec, &errstr, iov,
iovlen);
if (ret == TRYRET_SUCCESS)
break;
if (ret != TRYRET_LOCALERR)
remoteerr = 1;
if ((opflags & ISBGRND) == 0)
fprintf(stderr, "%s\n", errstr);
}
if (ret == TRYRET_SUCCESS)
break;
/* Exit if all errors were local. */
if (!remoteerr)
exit(1);
/*
* If retrycnt == 0, we are to keep retrying forever.
* Otherwise decrement it, and exit if it hits zero.
*/
if (retrycnt != 0 && --retrycnt == 0)
exit(1);
if ((opflags & (BGRND | ISBGRND)) == BGRND) {
warnx("Cannot immediately mount %s:%s, backgrounding",
hostp, spec);
opflags |= ISBGRND;
if (daemon(0, 0) != 0)
err(1, "daemon");
}
sleep(60);
}
freeaddrinfo(ai_nfs);
build_iovec(iov, iovlen, "hostname", nam, (size_t)-1);
/* Add mounted file system to PATH_MOUNTTAB */
if (!add_mtab(hostp, spec))
warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
return (1);
}
/*
* Try to set up the NFS arguments according to the address
* family, protocol (and possibly port) specified in `ai'.
*
* Returns TRYRET_SUCCESS if successful, or:
* TRYRET_TIMEOUT The server did not respond.
* TRYRET_REMOTEERR The server reported an error.
* TRYRET_LOCALERR Local failure.
*
* In all error cases, *errstr will be set to a statically-allocated string
* describing the error.
*/
static enum tryret
nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec, char **errstr,
struct iovec **iov, int *iovlen)
{
static char errbuf[256];
struct sockaddr_storage nfs_ss;
struct netbuf nfs_nb;
struct nfhret nfhret;
struct timeval try;
struct rpc_err rpcerr;
CLIENT *clp;
struct netconfig *nconf, *nconf_mnt;
const char *netid, *netid_mnt, *secname;
int doconnect, nfsvers, mntvers, sotype;
enum clnt_stat clntstat;
enum mountmode trymntmode;
sotype = 0;
trymntmode = mountmode;
errbuf[0] = '\0';
*errstr = errbuf;
if (nfsproto == IPPROTO_TCP)
sotype = SOCK_STREAM;
else if (nfsproto == IPPROTO_UDP)
sotype = SOCK_DGRAM;
if ((netid = netidbytype(ai->ai_family, sotype)) == NULL) {
snprintf(errbuf, sizeof errbuf,
"af %d sotype %d not supported", ai->ai_family, sotype);
return (TRYRET_LOCALERR);
}
if ((nconf = getnetconf_cached(netid)) == NULL) {
snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror());
return (TRYRET_LOCALERR);
}
/* The RPCPROG_MNT netid may be different. */
if (mnttcp_ok) {
netid_mnt = netid;
nconf_mnt = nconf;
} else {
if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM))
== NULL) {
snprintf(errbuf, sizeof errbuf,
"af %d sotype SOCK_DGRAM not supported",
ai->ai_family);
return (TRYRET_LOCALERR);
}
if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) {
snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt,
nc_sperror());
return (TRYRET_LOCALERR);
}
}
tryagain:
if (trymntmode == V4) {
nfsvers = 4;
mntvers = 3; /* Workaround for GCC. */
} else if (trymntmode == V2) {
nfsvers = 2;
mntvers = 1;
} else {
nfsvers = 3;
mntvers = 3;
}
if (portspec != NULL) {
/* `ai' contains the complete nfsd sockaddr. */
nfs_nb.buf = ai->ai_addr;
nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen;
} else {
/* Ask the remote rpcbind. */
nfs_nb.buf = &nfs_ss;
nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss;
if (!rpcb_getaddr(NFS_PROGRAM, nfsvers, nconf, &nfs_nb,
hostp)) {
if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH &&
trymntmode == ANY) {
trymntmode = V2;
goto tryagain;
}
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s",
netid, hostp, spec,
clnt_spcreateerror("RPCPROG_NFS"));
return (returncode(rpc_createerr.cf_stat,
&rpc_createerr.cf_error));
}
}
/* Check that the server (nfsd) responds on the port we have chosen. */
clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, NFS_PROGRAM, nfsvers,
0, 0);
if (clp == NULL) {
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS"));
return (returncode(rpc_createerr.cf_stat,
&rpc_createerr.cf_error));
}
if (sotype == SOCK_DGRAM && noconn == 0) {
/*
* Use connect(), to match what the kernel does. This
* catches cases where the server responds from the
* wrong source address.
*/
doconnect = 1;
if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) {
clnt_destroy(clp);
snprintf(errbuf, sizeof errbuf,
"[%s] %s:%s: CLSET_CONNECT failed", netid, hostp,
spec);
return (TRYRET_LOCALERR);
}
}
try.tv_sec = 10;
try.tv_usec = 0;
clntstat = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL,
(xdrproc_t)xdr_void, NULL, try);
if (clntstat != RPC_SUCCESS) {
if (clntstat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
clnt_destroy(clp);
trymntmode = V2;
goto tryagain;
}
clnt_geterr(clp, &rpcerr);
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
hostp, spec, clnt_sperror(clp, "NFSPROC_NULL"));
clnt_destroy(clp);
return (returncode(clntstat, &rpcerr));
}
clnt_destroy(clp);
/*
* For NFSv4, there is no mount protocol.
*/
if (trymntmode == V4) {
/*
* Store the server address in nfsargsp, making
* sure to copy any locally allocated structures.
*/
addrlen = nfs_nb.len;
addr = malloc(addrlen);
if (addr == NULL)
err(1, "malloc");
bcopy(nfs_nb.buf, addr, addrlen);
build_iovec(iov, iovlen, "addr", addr, addrlen);
secname = sec_num_to_name(secflavor);
if (secname != NULL) {
build_iovec(iov, iovlen, "sec",
__DECONST(void *, secname), (size_t)-1);
}
build_iovec(iov, iovlen, "nfsv4", NULL, 0);
build_iovec(iov, iovlen, "dirpath", spec, (size_t)-1);
return (TRYRET_SUCCESS);
}
/* Send the MOUNTPROC_MNT RPC to get the root filehandle. */
try.tv_sec = 10;
try.tv_usec = 0;
clp = clnt_tp_create(hostp, MOUNTPROG, mntvers, nconf_mnt);
if (clp == NULL) {
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create"));
return (returncode(rpc_createerr.cf_stat,
&rpc_createerr.cf_error));
}
clp->cl_auth = authsys_create_default();
nfhret.auth = secflavor;
nfhret.vers = mntvers;
clntstat = clnt_call(clp, MOUNTPROC_MNT, (xdrproc_t)xdr_dir, spec,
(xdrproc_t)xdr_fh, &nfhret,
try);
auth_destroy(clp->cl_auth);
if (clntstat != RPC_SUCCESS) {
if (clntstat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
clnt_destroy(clp);
trymntmode = V2;
goto tryagain;
}
clnt_geterr(clp, &rpcerr);
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
hostp, spec, clnt_sperror(clp, "RPCPROG_MNT"));
clnt_destroy(clp);
return (returncode(clntstat, &rpcerr));
}
clnt_destroy(clp);
if (nfhret.stat != 0) {
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
hostp, spec, strerror(nfhret.stat));
return (TRYRET_REMOTEERR);
}
/*
* Store the filehandle and server address in nfsargsp, making
* sure to copy any locally allocated structures.
*/
addrlen = nfs_nb.len;
addr = malloc(addrlen);
fhsize = nfhret.fhsize;
fh = malloc(fhsize);
if (addr == NULL || fh == NULL)
err(1, "malloc");
bcopy(nfs_nb.buf, addr, addrlen);
bcopy(nfhret.nfh, fh, fhsize);
build_iovec(iov, iovlen, "addr", addr, addrlen);
build_iovec(iov, iovlen, "fh", fh, fhsize);
secname = sec_num_to_name(nfhret.auth);
if (secname) {
build_iovec(iov, iovlen, "sec",
__DECONST(void *, secname), (size_t)-1);
}
if (nfsvers == 3)
build_iovec(iov, iovlen, "nfsv3", NULL, 0);
return (TRYRET_SUCCESS);
}
/*
* Catagorise a RPC return status and error into an `enum tryret'
* return code.
*/
static enum tryret
returncode(enum clnt_stat clntstat, struct rpc_err *rpcerr)
{
switch (clntstat) {
case RPC_TIMEDOUT:
return (TRYRET_TIMEOUT);
case RPC_PMAPFAILURE:
case RPC_PROGNOTREGISTERED:
case RPC_PROGVERSMISMATCH:
/* XXX, these can be local or remote. */
case RPC_CANTSEND:
case RPC_CANTRECV:
return (TRYRET_REMOTEERR);
case RPC_SYSTEMERROR:
switch (rpcerr->re_errno) {
case ETIMEDOUT:
return (TRYRET_TIMEOUT);
case ENOMEM:
break;
default:
return (TRYRET_REMOTEERR);
}
/* FALLTHROUGH */
default:
break;
}
return (TRYRET_LOCALERR);
}
/*
* Look up a netid based on an address family and socket type.
* `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM.
*
* XXX there should be a library function for this.
*/
static const char *
netidbytype(int af, int sotype)
{
struct nc_protos *p;
for (p = nc_protos; p->netid != NULL; p++) {
if (af != p->af || sotype != p->sotype)
continue;
return (p->netid);
}
return (NULL);
}
/*
* Look up a netconfig entry based on a netid, and cache the result so
* that we don't need to remember to call freenetconfigent().
*
* Otherwise it behaves just like getnetconfigent(), so nc_*error()
* work on failure.
*/
static struct netconfig *
getnetconf_cached(const char *netid)
{
static struct nc_entry {
struct netconfig *nconf;
struct nc_entry *next;
} *head;
struct nc_entry *p;
struct netconfig *nconf;
for (p = head; p != NULL; p = p->next)
if (strcmp(netid, p->nconf->nc_netid) == 0)
return (p->nconf);
if ((nconf = getnetconfigent(netid)) == NULL)
return (NULL);
if ((p = malloc(sizeof(*p))) == NULL)
err(1, "malloc");
p->nconf = nconf;
p->next = head;
head = p;
return (p->nconf);
}
/*
* xdr routines for mount rpc's
*/
static int
xdr_dir(XDR *xdrsp, char *dirp)
{
return (xdr_string(xdrsp, &dirp, MNTPATHLEN));
}
static int
xdr_fh(XDR *xdrsp, struct nfhret *np)
{
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 = NFS_FHSIZE;
return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFS_FHSIZE));
case 3:
if (!xdr_long(xdrsp, &np->fhsize))
return (0);
if (np->fhsize <= 0 || np->fhsize > NFS3_FHSIZE)
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 (np->auth == -1) {
np->auth = auth;
authfnd++;
} else if (auth == np->auth) {
authfnd++;
}
}
/*
* Some servers, such as DEC's OSF/1 return a nil authenticator
* list to indicate RPCAUTH_UNIX.
*/
if (authcnt == 0 && np->auth == -1)
np->auth = AUTH_SYS;
if (!authfnd && (authcnt > 0 || np->auth != AUTH_SYS))
np->stat = EAUTH;
return (1);
}
return (0);
}
static void
usage(void)
{
(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
"usage: mount_nfs [-23bcdiLlNPsTU] [-a maxreadahead] [-D deadthresh]",
" [-g maxgroups] [-I readdirsize] [-o options] [-R retrycnt]",
" [-r readsize] [-t timeout] [-w writesize] [-x retrans]",
" rhost:path node");
exit(1);
}
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