poky/scripts/runqemu-export-rootfs
Cody P Schafer 6bb9860ef7 runqemu-export-rootfs: don't change RPC ports
RPC ports (also known as rpc program numbers) are values:

 - given to rpcbind (aka portmapper) to allow nfsv3 clients that don't
   know the tcp/udp port number of nfsd and mountd to look it up the
   tcp/udp port number, and to

 - allow a single transport (ie: tcp/udp port) to provide multiple
   sunrpc services.

OE has carried patches to nfsutils & linux for some time to support the
mountprog & nfsprog options.

In the case of runqemu-export-rootfs, we don't need to use custom rpc
program numbers because runqemu-export-rootfs tells unfsd not to
register with the portmapper, and unfsd runs the nfs and mount rpc
services on tcp/udp ports unfsd binds itself (iow: the tcp/udp ports are
not shared in the sunrpc sense).

Linux's nfs client does not query rpcbind when tcp/udp port numbers are
specified (in net/sunrpc/clnt.c, call_bind checks for the tcp/udp port
with xprt_bound() and skips the call to rpcbind if xprtsock.c's
xs_setup_udp() or xs_setup_tcp() has found a non-zero tcp/udp port).

The program numbers _are_ sent over the mount & nfs protocol (really,
over sunrpc), and checked to match at both ends. As a result, even when
rpcbind is unused, using different program numbers in unfsd vs linux
nfs client causes mounts to fail (and nfsroot mounts to timeout).

The result is that specifying custom program numbers in
runqemu-export-rootfs doesn't solve any conflicts, it simply requires
that users of runqemu-export-rootfs carry a kernel patch & adds 2 extra
parameters to the kernel command line unnecessarily.

Change runqemu-export-rootfs to use the default program numbers.

For now, I have not dropped the custom program number patches to linux,
nfs-utils, and unfsd just in case someone is using them in a
non-runqemu-export-rootfs context.

CC: Bruce Ashfield <bruce.ashfield@gmail.com>
CC: Mark Hatle <mark.hatle@windriver.com>
(From OE-Core rev: 9c91df324dfe58273f5a1d1d33dba1d34a180db7)

Signed-off-by: Cody P Schafer <dev@codyps.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2017-06-12 15:08:32 +01:00

4.4 KiB
Executable File

#!/bin/bash

Copyright (c) 2005-2009 Wind River Systems, Inc.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License version 2 as

published by the Free Software Foundation.

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.

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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

usage() { echo "Usage: $0 {start|stop|restart} " }

if [ $# != 2 ]; then usage exit 1 fi

if ; then echo "Unknown command '$1'" usage exit 1 fi

if [ ! -d "$2" ]; then echo "Error: '$2' does not exist" usage exit 1 fi

Ensure the nfs-export-dir is an absolute path

NFS_EXPORT_DIR=$(cd "$2" && pwd)

SYSROOT_SETUP_SCRIPT=which oe-find-native-sysroot 2> /dev/null if [ -z "$SYSROOT_SETUP_SCRIPT" ]; then echo "Error: Unable to find the oe-find-native-sysroot script" echo "Did you forget to source your build environment setup script?" exit 1 fi . $SYSROOT_SETUP_SCRIPT meta-ide-support

if [ ! -e "$OECORE_NATIVE_SYSROOT/usr/bin/unfsd" ]; then echo "Error: Unable to find unfsd binary in $OECORE_NATIVE_SYSROOT/usr/bin/"

if [ "x$OECORE_DISTRO_VERSION" = "x" ]; then
	echo "Have you run 'bitbake meta-ide-support'?"
else
	echo "This shouldn't happen - something is missing from your toolchain installation"
fi
exit 1

fi

if [ ! -d ~/.runqemu-sdk ]; then mkdir -p ~/.runqemu-sdk fi

NFS_INSTANCE=${NFS_INSTANCE:=0} EXPORTS=~/.runqemu-sdk/exports$NFS_INSTANCE RMTAB=~/.runqemu-sdk/rmtab$NFS_INSTANCE NFSPID=~/.runqemu-sdk/nfs$NFS_INSTANCE.pid MOUNTPID=~/.runqemu-sdk/mount$NFS_INSTANCE.pid

PSEUDO_OPTS="-P $OECORE_NATIVE_SYSROOT/usr" PSEUDO_LOCALSTATEDIR="$NFS_EXPORT_DIR/../$(basename $NFS_EXPORT_DIR).pseudo_state" export PSEUDO_LOCALSTATEDIR

if [ ! -d "$PSEUDO_LOCALSTATEDIR" ]; then echo "Error: $PSEUDO_LOCALSTATEDIR does not exist." echo "Did you create the export directory using runqemu-extract-sdk?" exit 1 fi

NFS server port number

NFSD_PORT=${NFSD_PORT:=$[ 3049 + 2 * $NFS_INSTANCE ]}

mountd port number

MOUNTD_PORT=${MOUNTD_PORT:=$[ 3048 + 2 * $NFS_INSTANCE ]}

For debugging you would additionally add

--debug all

UNFSD_OPTS="-p -N -i $NFSPID -e $EXPORTS -n $NFSD_PORT -m $MOUNTD_PORT"

See how we were called.

case "$1" in start) PORTMAP_RUNNING=ps -ef | grep portmap | grep -v grep RPCBIND_RUNNING=ps -ef | grep rpcbind | grep -v grep if ; then echo "=======================================================" echo "Error: neither rpcbind nor portmap appear to be running" echo "Please install and start one of these services first" echo "=======================================================" echo "Tip: for recent Ubuntu hosts, run:" echo " sudo apt-get install rpcbind" echo "Then add OPTIONS="-i -w" to /etc/default/rpcbind and run" echo " sudo service portmap restart"

	exit 1
fi

echo "Creating exports file..."
echo "$NFS_EXPORT_DIR (rw,no_root_squash,no_all_squash,insecure)" > $EXPORTS

echo "Starting User Mode nfsd"
echo "  $PSEUDO $PSEUDO_OPTS $OECORE_NATIVE_SYSROOT/usr/bin/unfsd $UNFSD_OPTS"
$PSEUDO $PSEUDO_OPTS $OECORE_NATIVE_SYSROOT/usr/bin/unfsd $UNFSD_OPTS
if [ ! $? = 0 ]; then
	echo "Error starting nfsd"
	exit 1
fi
# Check to make sure everything started ok.
if [ ! -f $NFSPID ]; then
	echo "rpc.nfsd did not start correctly"
	exit 1
fi
ps -fp `cat $NFSPID` > /dev/null 2> /dev/null
if [ ! $? = 0 ]; then
	echo "rpc.nfsd did not start correctly"
	exit 1
fi
echo " "
echo "On your target please remember to add the following options for NFS"
echo "nfsroot=IP_ADDRESS:$NFS_EXPORT_DIR,nfsvers=3,port=$NFSD_PORT,udp,mountport=$MOUNTD_PORT"
;;

stop) if [ -f "$NFSPID" ]; then echo "Stopping rpc.nfsd" kill cat $NFSPID rm -f $NFSPID else echo "No PID file, not stopping rpc.nfsd" fi if [ -f "$EXPORTS" ]; then echo "Removing exports file" rm -f $EXPORTS fi ;; restart) $0 stop $NFS_EXPORT_DIR $0 start $NFS_EXPORT_DIR if [ ! $? = 0 ]; then exit 1 fi ;; *) echo "$0 {start|stop|restart} " ;; esac

exit 0