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/*
* Guillaume Cottenceau (gc@mandrakesoft.com)
*
* Copyright 2000 MandrakeSoft
*
* This software may be freely redistributed under the terms of the GNU
* public license.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/* this is based on work from redhat, made it lighter (gc)
*/
/* MODIFIED for Red Hat Linux installer
* msw@redhat.com
* o always mounts without lockd
* o uses our own host resolution
*/
/*
* nfsmount.c -- Linux NFS mount
* Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
* numbers to be specified on the command line.
*
* Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
* Omit the call to connect() for Linux version 1.3.11 or later.
*
* Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
* Implemented the "bg", "fg" and "retry" mount options for NFS.
*/
/*
* nfsmount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp
*/
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <netdb.h>
#include <sys/mount.h>
#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/utsname.h>
#include <sys/stat.h>
#include <arpa/inet.h>
#include "linux-2.2/nfs.h"
#include "linux-2.2/nfs_mount.h" //#include "mount_constants.h"
#include "dns.h"
#include "log.h"
#include "nfsmount.h"
bool_t
xdr_fhandle(XDR *xdrs, fhandle objp)
{
if (!xdr_opaque(xdrs, objp, FHSIZE)) {
return (FALSE);
}
return (TRUE);
}
bool_t
xdr_fhstatus(XDR *xdrs, fhstatus *objp)
{
if (!xdr_u_int(xdrs, &objp->fhs_status)) {
return (FALSE);
}
switch (objp->fhs_status) {
case 0:
if (!xdr_fhandle(xdrs, objp->fhstatus_u.fhs_fhandle)) {
return (FALSE);
}
break;
default:
break;
}
return (TRUE);
}
bool_t
xdr_dirpath(XDR *xdrs, dirpath *objp)
{
if (!xdr_string(xdrs, objp, MNTPATHLEN)) {
return (FALSE);
}
return (TRUE);
}
static int nfs_mount_version = 3; /* kernel >= 2.1.32 */ /* *********** TODO for kernel 2.4, nfs-mount version 4 */
int nfsmount_prepare(const char *spec, int *flags, char **mount_opts)
{
char hostdir[1024];
CLIENT *mclient;
char *hostname, *dirname;
fhandle root_fhandle;
struct timeval total_timeout;
enum clnt_stat clnt_stat;
static struct nfs_mount_data data;
struct sockaddr_in server_addr;
struct sockaddr_in mount_server_addr;
int msock, fsock;
struct timeval retry_timeout;
struct fhstatus status;
char *s;
int port;
msock = fsock = -1;
mclient = NULL;
strncpy(hostdir, spec, sizeof(hostdir));
if ((s = (strchr(hostdir, ':')))) {
hostname = hostdir;
dirname = s + 1;
*s = '\0';
} else {
log_message("nfsmount: format not host:dir");
goto fail;
}
server_addr.sin_family = AF_INET;
/* first, try as IP address */
if (!inet_aton(hostname, &server_addr.sin_addr)) {
/* failure, try as machine name */
if (mygethostbyname(hostname, &server_addr.sin_addr)) {
log_message("nfsmount: can't get address for %s", hostname);
goto fail;
} else
server_addr.sin_family = AF_INET;
}
memcpy (&mount_server_addr, &server_addr, sizeof (mount_server_addr));
/* Set default options.
* rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
* let the kernel decide.
* timeo is filled in after we know whether it'll be TCP or UDP. */
memset(&data, 0, sizeof(data));
data.retrans = 3;
data.acregmin = 3;
data.acregmax = 60;
data.acdirmin = 30;
data.acdirmax = 60;
#if NFS_MOUNT_VERSION >= 2
data.namlen = NAME_MAX;
#endif
#if NFS_MOUNT_VERSION >= 3
if (nfs_mount_version >= 3)
data.flags |= NFS_MOUNT_NONLM; /* HACK HACK msw */
#endif
/* Adjust options if none specified */
if (!data.timeo)
data.timeo = 7; /* udp */
data.version = nfs_mount_version;
*mount_opts = (char *) &data;
if (*flags & MS_REMOUNT)
return 0;
retry_timeout.tv_sec = 3;
retry_timeout.tv_usec = 0;
total_timeout.tv_sec = 20;
total_timeout.tv_usec = 0;
/* contact the mount daemon via TCP */
mount_server_addr.sin_port = htons(0);
msock = RPC_ANYSOCK;
mclient = clnttcp_create(&mount_server_addr, MOUNTPROG, MOUNTVERS, &msock, 0, 0);
/* if this fails, contact the mount daemon via UDP */
if (!mclient) {
mount_server_addr.sin_port = htons(0);
msock = RPC_ANYSOCK;
mclient = clntudp_create(&mount_server_addr, MOUNTPROG, MOUNTVERS, retry_timeout, &msock);
}
if (mclient) {
/* try to mount hostname:dirname */
mclient->cl_auth = authunix_create_default();
clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
(xdrproc_t) xdr_dirpath, (caddr_t) &dirname,
(xdrproc_t) xdr_fhstatus, (caddr_t) &status,
total_timeout);
if (clnt_stat != RPC_SUCCESS) {
if (errno != ECONNREFUSED) {
log_message(clnt_sperror(mclient, "mount"));
goto fail; /* don't retry */
}
log_message(clnt_sperror(mclient, "mount"));
auth_destroy(mclient->cl_auth);
clnt_destroy(mclient);
mclient = 0;
close(msock);
}
} else
goto fail;
if (status.fhs_status != 0) {
log_message("nfsmount prepare failed, reason given by server: %d", status.fhs_status);
goto fail;
}
memcpy((char *) &root_fhandle, (char *) status.fhstatus_u.fhs_fhandle, sizeof (root_fhandle));
/* create nfs socket for kernel */
fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (fsock < 0) {
log_perror("nfs socket");
goto fail;
}
if (bindresvport(fsock, 0) < 0) {
log_perror("nfs bindresvport");
goto fail;
}
server_addr.sin_port = PMAPPORT;
port = pmap_getport(&server_addr, NFS_PROGRAM, NFS_VERSION, IPPROTO_UDP);
if (port == 0)
port = NFS_PORT;
#ifdef NFS_MOUNT_DEBUG
else
log_message("used portmapper to find NFS port\n");
log_message("using port %d for nfs deamon\n", port);
#endif
server_addr.sin_port = htons(port);
/* prepare data structure for kernel */
data.fd = fsock;
memcpy((char *) &data.root, (char *) &root_fhandle, sizeof (root_fhandle));
memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
strncpy(data.hostname, hostname, sizeof(data.hostname));
/* clean up */
auth_destroy(mclient->cl_auth);
clnt_destroy(mclient);
close(msock);
return 0;
/* abort */
fail:
if (msock != -1) {
if (mclient) {
auth_destroy(mclient->cl_auth);
clnt_destroy(mclient);
}
close(msock);
}
if (fsock != -1)
close(fsock);
return -1;
}
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