tests: Allow passing more arguments to vm-run.sh

The script is currently limited by the maximum kernel command line
length and if that's exceeded the kernel panics at boot. Fix this by
writing the arguments to a file and reading it in the VM.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

tests/hwsim/vm/inside.sh

@@ -22,7 +22,7 @@ sysctl kernel.panic=1
 TESTDIR=$(sed 's/.*testdir=\([^ ]*\) .*/\1/' /proc/cmdline)
 TIMEWARP=$(sed 's/.*timewarp=\([^ ]*\) .*/\1/' /proc/cmdline)
 EPATH=$(sed 's/.*EPATH=\([^ ]*\) .*/\1/' /proc/cmdline)
-ARGS=$(sed 's/.*ARGS=//' /proc/cmdline)
+ARGS=$(sed 's/.*ARGS=\([^ ]*\)\( \|$\).*/\1/' /proc/cmdline)
 
 # create /dev entries we need
 mknod -m 660 /dev/ttyS0 c 4 64
@@ -78,6 +78,10 @@ ip link set lo up
 mkdir /tmp/logs
 mount -t 9p -o trans=virtio,rw logshare /tmp/logs
 
+# allow access to any outside directory (e.g. /tmp) we also have
+mkdir /tmp/host
+mount --bind / /tmp/host
+
 if [ "$TIMEWARP" = "1" ] ; then
     (
         while sleep 1 ; do
@@ -107,7 +111,7 @@ else
 	dbus-daemon --config-file=$TESTDIR/vm/dbus.conf --fork
 
 	cd $TESTDIR
-	./run-all.sh $ARGS </dev/ttyS0 >/dev/ttyS0 2>&1
+	./run-all.sh $(cat /tmp/host$ARGS) </dev/ttyS0 >/dev/ttyS0 2>&1
 	if test -d /sys/kernel/debug/gcov ; then
 		cp -ar /sys/kernel/debug/gcov /tmp/logs/
 		# these are broken as they're updated while being read ...

tests/hwsim/vm/vm-run.sh

@@ -113,6 +113,17 @@ for kvmprog in kvm qemu-kvm; do
     fi
 done
 
+argsfile=$(mktemp)
+if [ $? -ne 0 ] ; then
+	exit 2
+fi
+function finish {
+	rm -f $argsfile
+}
+trap finish EXIT
+
+echo "$RUN_TEST_ARGS" > $argsfile
+
 $KVM \
 	-kernel $KERNEL -smp 4 \
 	$KVMARGS -m $MEMORY -nographic \
@@ -121,7 +132,7 @@ $KVM \
 	-fsdev local,security_model=none,id=fsdev-logs,path="$LOGDIR",writeout=immediate \
 	-device virtio-9p-pci,id=fs-logs,fsdev=fsdev-logs,mount_tag=logshare \
 	-monitor null -serial stdio -serial file:$LOGDIR/console \
-	-append "mac80211_hwsim.support_p2p_device=0 mac80211_hwsim.channels=$CHANNELS mac80211_hwsim.radios=7 init=$CMD testdir=$TESTDIR timewarp=$TIMEWARP console=$KVMOUT root=/dev/root rootflags=trans=virtio,version=9p2000.u ro rootfstype=9p EPATH=$EPATH ARGS=$RUN_TEST_ARGS"
+	-append "mac80211_hwsim.support_p2p_device=0 mac80211_hwsim.channels=$CHANNELS mac80211_hwsim.radios=7 init=$CMD testdir=$TESTDIR timewarp=$TIMEWARP console=$KVMOUT root=/dev/root rootflags=trans=virtio,version=9p2000.u ro rootfstype=9p EPATH=$EPATH ARGS=$argsfile"
 
 if [ $CODECOV = "yes" ]; then
     echo "Preparing code coverage reports"