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freebsd-skq/sbin/mount_nfs/mount_nfs.c
jh ae73284c1a Change checkpath() to not exit on error. This is a prerequisite for 
fixing the mount(8) "failok" option.

PR:		163668
Reviewed by:	Garrett Cooper, delphij (previous version)
2012-01-16 19:34:21 +00:00

1223 lines
32 KiB
C
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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.
* 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.
*/
#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. */
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
int retrycnt = -1;
int opflags = 0;
int nfsproto = IPPROTO_TCP;
int mnttcp_ok = 1;
int noconn = 0;
char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */
struct sockaddr *addr;
int addrlen = 0;
u_char *fh = NULL;
int fhsize = 0;
int secflavor = -1;
int got_principal = 0;
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 fallback_mount(struct iovec *iov, int iovlen, int mntflags);
static int sec_name_to_num(char *sec);
static 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 mntflags, num, iovlen;
int osversion;
char *name, *p, *spec, *fstype;
char mntpath[MAXPATHLEN], errmsg[255];
char hostname[MAXHOSTNAMELEN + 1], *gssname, gssn[MAXHOSTNAMELEN + 50];
mntflags = 0;
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;
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(&portspec, "%d",
atoi(val));
if (portspec == NULL)
err(1, "asprintf");
} else if (strcmp(opt, "principal") == 0) {
got_principal = 1;
} 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);
}
if (pass_flag_to_nmount)
build_iovec(&iov, &iovlen, opt, 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++;
name = *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", gssname,
strlen(gssname) + 1);
}
if (!getnfsargs(spec, &iov, &iovlen))
exit(1);
/* resolve the mountpoint with realpath(3) */
if (checkpath(name, mntpath) != 0)
err(1, "%s", mntpath);
build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
/*
* XXX:
* Backwards compatibility routines for older kernels.
* Remove this and fallback_mount() code when we do not need to support
* NFS mounts against older kernels which still need
* struct nfs_args to be passed in via nmount().
*/
osversion = getosreldate();
if (osversion >= 702100) {
if (nmount(iov, iovlen, mntflags))
err(1, "%s, %s", mntpath, errmsg);
} else {
if (fallback_mount(iov, iovlen, mntflags))
err(1, "%s, %s", mntpath, errmsg);
}
exit(0);
}
static int
findopt(struct iovec *iov, int iovlen, const char *name,
char **valuep, int *lenp)
{
int i;
for (i = 0; i < iovlen/2; i++, iov += 2) {
if (strcmp(name, iov[0].iov_base) == 0) {
if (valuep)
*valuep = iov[1].iov_base;
if (lenp)
*lenp = iov[1].iov_len;
return (0);
}
}
return (ENOENT);
}
static void
copyopt(struct iovec **newiov, int *newiovlen,
struct iovec *iov, int iovlen, const char *name)
{
char *value;
int len;
if (findopt(iov, iovlen, name, &value, &len) == 0)
build_iovec(newiov, newiovlen, name, value, len);
}
/*
* XXX: This function is provided for backwards
* compatibility with older kernels which did not support
* passing NFS mount options to nmount() as individual
* parameters. It should be eventually be removed.
*/
static int
fallback_mount(struct iovec *iov, int iovlen, int mntflags)
{
struct nfs_args args = {
.version = NFS_ARGSVERSION,
.addr = NULL,
.addrlen = sizeof (struct sockaddr_in),
.sotype = SOCK_STREAM,
.proto = 0,
.fh = NULL,
.fhsize = 0,
.flags = NFSMNT_RESVPORT,
.wsize = NFS_WSIZE,
.rsize = NFS_RSIZE,
.readdirsize = NFS_READDIRSIZE,
.timeo = 10,
.retrans = NFS_RETRANS,
.maxgrouplist = NFS_MAXGRPS,
.readahead = NFS_DEFRAHEAD,
.wcommitsize = 0, /* was: NQ_DEFLEASE */
.deadthresh = NFS_MAXDEADTHRESH, /* was: NQ_DEADTHRESH */
.hostname = NULL,
/* args version 4 */
.acregmin = NFS_MINATTRTIMO,
.acregmax = NFS_MAXATTRTIMO,
.acdirmin = NFS_MINDIRATTRTIMO,
.acdirmax = NFS_MAXDIRATTRTIMO,
};
int ret;
char *opt;
struct iovec *newiov;
int newiovlen;
if (findopt(iov, iovlen, "dumbtimer", NULL, NULL) == 0)
args.flags |= NFSMNT_DUMBTIMR;
if (findopt(iov, iovlen, "noconn", NULL, NULL) == 0)
args.flags |= NFSMNT_NOCONN;
if (findopt(iov, iovlen, "conn", NULL, NULL) == 0)
args.flags |= NFSMNT_NOCONN;
if (findopt(iov, iovlen, "nolockd", NULL, NULL) == 0)
args.flags |= NFSMNT_NOLOCKD;
if (findopt(iov, iovlen, "lockd", NULL, NULL) == 0)
args.flags &= ~NFSMNT_NOLOCKD;
if (findopt(iov, iovlen, "intr", NULL, NULL) == 0)
args.flags |= NFSMNT_INT;
if (findopt(iov, iovlen, "rdirplus", NULL, NULL) == 0)
args.flags |= NFSMNT_RDIRPLUS;
if (findopt(iov, iovlen, "resvport", NULL, NULL) == 0)
args.flags |= NFSMNT_RESVPORT;
if (findopt(iov, iovlen, "noresvport", NULL, NULL) == 0)
args.flags &= ~NFSMNT_RESVPORT;
if (findopt(iov, iovlen, "soft", NULL, NULL) == 0)
args.flags |= NFSMNT_SOFT;
if (findopt(iov, iovlen, "hard", NULL, NULL) == 0)
args.flags &= ~NFSMNT_SOFT;
if (findopt(iov, iovlen, "mntudp", NULL, NULL) == 0)
args.sotype = SOCK_DGRAM;
if (findopt(iov, iovlen, "udp", NULL, NULL) == 0)
args.sotype = SOCK_DGRAM;
if (findopt(iov, iovlen, "tcp", NULL, NULL) == 0)
args.sotype = SOCK_STREAM;
if (findopt(iov, iovlen, "nfsv3", NULL, NULL) == 0)
args.flags |= NFSMNT_NFSV3;
if (findopt(iov, iovlen, "readdirsize", &opt, NULL) == 0) {
if (opt == NULL) {
errx(1, "illegal readdirsize");
}
ret = sscanf(opt, "%d", &args.readdirsize);
if (ret != 1 || args.readdirsize <= 0) {
errx(1, "illegal readdirsize: %s", opt);
}
args.flags |= NFSMNT_READDIRSIZE;
}
if (findopt(iov, iovlen, "readahead", &opt, NULL) == 0) {
if (opt == NULL) {
errx(1, "illegal readahead");
}
ret = sscanf(opt, "%d", &args.readahead);
if (ret != 1 || args.readahead <= 0) {
errx(1, "illegal readahead: %s", opt);
}
args.flags |= NFSMNT_READAHEAD;
}
if (findopt(iov, iovlen, "wsize", &opt, NULL) == 0) {
if (opt == NULL) {
errx(1, "illegal wsize");
}
ret = sscanf(opt, "%d", &args.wsize);
if (ret != 1 || args.wsize <= 0) {
errx(1, "illegal wsize: %s", opt);
}
args.flags |= NFSMNT_WSIZE;
}
if (findopt(iov, iovlen, "rsize", &opt, NULL) == 0) {
if (opt == NULL) {
errx(1, "illegal rsize");
}
ret = sscanf(opt, "%d", &args.rsize);
if (ret != 1 || args.rsize <= 0) {
errx(1, "illegal wsize: %s", opt);
}
args.flags |= NFSMNT_RSIZE;
}
if (findopt(iov, iovlen, "retrans", &opt, NULL) == 0) {
if (opt == NULL) {
errx(1, "illegal retrans");
}
ret = sscanf(opt, "%d", &args.retrans);
if (ret != 1 || args.retrans <= 0) {
errx(1, "illegal retrans: %s", opt);
}
args.flags |= NFSMNT_RETRANS;
}
if (findopt(iov, iovlen, "acregmin", &opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.acregmin);
if (ret != 1 || args.acregmin < 0) {
errx(1, "illegal acregmin: %s", opt);
}
args.flags |= NFSMNT_ACREGMIN;
}
if (findopt(iov, iovlen, "acregmax", &opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.acregmax);
if (ret != 1 || args.acregmax < 0) {
errx(1, "illegal acregmax: %s", opt);
}
args.flags |= NFSMNT_ACREGMAX;
}
if (findopt(iov, iovlen, "acdirmin", &opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.acdirmin);
if (ret != 1 || args.acdirmin < 0) {
errx(1, "illegal acdirmin: %s", opt);
}
args.flags |= NFSMNT_ACDIRMIN;
}
if (findopt(iov, iovlen, "acdirmax", &opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.acdirmax);
if (ret != 1 || args.acdirmax < 0) {
errx(1, "illegal acdirmax: %s", opt);
}
args.flags |= NFSMNT_ACDIRMAX;
}
if (findopt(iov, iovlen, "wcommitsize", &opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.wcommitsize);
if (ret != 1 || args.wcommitsize < 0) {
errx(1, "illegal wcommitsize: %s", opt);
}
args.flags |= NFSMNT_WCOMMITSIZE;
}
if (findopt(iov, iovlen, "deadthresh", &opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.deadthresh);
if (ret != 1 || args.deadthresh <= 0) {
errx(1, "illegal deadthresh: %s", opt);
}
args.flags |= NFSMNT_DEADTHRESH;
}
if (findopt(iov, iovlen, "timeout", &opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.timeo);
if (ret != 1 || args.timeo <= 0) {
errx(1, "illegal timeout: %s", opt);
}
args.flags |= NFSMNT_TIMEO;
}
if (findopt(iov, iovlen, "maxgroups", &opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.maxgrouplist);
if (ret != 1 || args.timeo <= 0) {
errx(1, "illegal maxgroups: %s", opt);
}
args.flags |= NFSMNT_MAXGRPS;
}
if (findopt(iov, iovlen, "addr", &opt,
&args.addrlen) == 0) {
args.addr = (struct sockaddr *) opt;
}
if (findopt(iov, iovlen, "fh", &opt, &args.fhsize) == 0) {
args.fh = opt;
}
if (findopt(iov, iovlen, "hostname", &args.hostname,
NULL) == 0) {
}
if (args.hostname == NULL) {
errx(1, "Invalid hostname");
}
newiov = NULL;
newiovlen = 0;
build_iovec(&newiov, &newiovlen, "nfs_args", &args, sizeof(args));
copyopt(&newiov, &newiovlen, iov, iovlen, "fstype");
copyopt(&newiov, &newiovlen, iov, iovlen, "fspath");
copyopt(&newiov, &newiovlen, iov, iovlen, "errmsg");
return nmount(newiov, newiovlen, mntflags);
}
static int
sec_name_to_num(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 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 >= 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;
char *secname;
int doconnect, nfsvers, mntvers, sotype;
enum clnt_stat stat;
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;
} 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;
stat = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL,
(xdrproc_t)xdr_void, NULL, try);
if (stat != RPC_SUCCESS) {
if (stat == 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(stat, &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", 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;
stat = clnt_call(clp, MOUNTPROC_MNT, (xdrproc_t)xdr_dir, spec,
(xdrproc_t)xdr_fh, &nfhret,
try);
auth_destroy(clp->cl_auth);
if (stat != RPC_SUCCESS) {
if (stat == 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(stat, &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", 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 stat, struct rpc_err *rpcerr)
{
switch (stat) {
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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