[kvm-unit-tests PATCH v4 5/8] arch-run: rename migration variables

[Nicholas Piggin <npiggin@gmail.com>]

Using 1 and 2 for source and destination is confusing, particularly
now with multiple migrations that flip between them. Do a rename
pass to 'src' and 'dst' to tidy things up.

Acked-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 scripts/arch-run.bash | 111 +++++++++++++++++++++---------------------
 1 file changed, 56 insertions(+), 55 deletions(-)

diff --git a/scripts/arch-run.bash b/scripts/arch-run.bash
index c2002d7a..c98429e8 100644
--- a/scripts/arch-run.bash
+++ b/scripts/arch-run.bash
@@ -132,27 +132,27 @@ run_migration ()
 	migcmdline=$@
 
 	trap 'trap - TERM ; kill 0 ; exit 2' INT TERM
-	trap 'rm -f ${migout1} ${migout2} ${migout_fifo1} ${migout_fifo2} ${migsock} ${qmp1} ${qmp2} ${fifo}' RETURN EXIT
-
-	migsock=$(mktemp -u -t mig-helper-socket.XXXXXXXXXX)
-	migout1=$(mktemp -t mig-helper-stdout1.XXXXXXXXXX)
-	migout_fifo1=$(mktemp -u -t mig-helper-fifo-stdout1.XXXXXXXXXX)
-	migout2=$(mktemp -t mig-helper-stdout2.XXXXXXXXXX)
-	migout_fifo2=$(mktemp -u -t mig-helper-fifo-stdout2.XXXXXXXXXX)
-	qmp1=$(mktemp -u -t mig-helper-qmp1.XXXXXXXXXX)
-	qmp2=$(mktemp -u -t mig-helper-qmp2.XXXXXXXXXX)
-	fifo=$(mktemp -u -t mig-helper-fifo.XXXXXXXXXX)
-	qmpout1=/dev/null
-	qmpout2=/dev/null
-
-	mkfifo ${migout_fifo1}
-	mkfifo ${migout_fifo2}
+	trap 'rm -f ${src_out} ${dst_out} ${src_outfifo} ${dst_outfifo} ${dst_incoming} ${src_qmp} ${dst_qmp} ${dst_infifo}' RETURN EXIT
+
+	dst_incoming=$(mktemp -u -t mig-helper-socket-incoming.XXXXXXXXXX)
+	src_out=$(mktemp -t mig-helper-stdout1.XXXXXXXXXX)
+	src_outfifo=$(mktemp -u -t mig-helper-fifo-stdout1.XXXXXXXXXX)
+	dst_out=$(mktemp -t mig-helper-stdout2.XXXXXXXXXX)
+	dst_outfifo=$(mktemp -u -t mig-helper-fifo-stdout2.XXXXXXXXXX)
+	src_qmp=$(mktemp -u -t mig-helper-qmp1.XXXXXXXXXX)
+	dst_qmp=$(mktemp -u -t mig-helper-qmp2.XXXXXXXXXX)
+	dst_infifo=$(mktemp -u -t mig-helper-fifo-stdin.XXXXXXXXXX)
+	src_qmpout=/dev/null
+	dst_qmpout=/dev/null
+
+	mkfifo ${src_outfifo}
+	mkfifo ${dst_outfifo}
 
 	eval "$migcmdline" \
-		-chardev socket,id=mon1,path=${qmp1},server=on,wait=off \
-		-mon chardev=mon1,mode=control > ${migout_fifo1} &
+		-chardev socket,id=mon,path=${src_qmp},server=on,wait=off \
+		-mon chardev=mon,mode=control > ${src_outfifo} &
 	live_pid=$!
-	cat ${migout_fifo1} | tee ${migout1} &
+	cat ${src_outfifo} | tee ${src_out} &
 
 	# Start the first destination QEMU machine in advance of the test
 	# reaching the migration point, since we expect at least one migration.
@@ -162,7 +162,7 @@ run_migration ()
 
 	while ps -p ${live_pid} > /dev/null ; do
 		# Wait for test exit or further migration messages.
-		if ! grep -q -i "Now migrate the VM" < ${migout1} ; then
+		if ! grep -q -i "Now migrate the VM" < ${src_out} ; then
 			sleep 0.1
 		else
 			do_migration || return $?
@@ -184,80 +184,81 @@ do_migration ()
 	# We have to use cat to open the named FIFO, because named FIFO's,
 	# unlike pipes, will block on open() until the other end is also
 	# opened, and that totally breaks QEMU...
-	mkfifo ${fifo}
+	mkfifo ${dst_infifo}
 	eval "$migcmdline" \
-		-chardev socket,id=mon2,path=${qmp2},server=on,wait=off \
-		-mon chardev=mon2,mode=control -incoming unix:${migsock} \
-		< <(cat ${fifo}) > ${migout_fifo2} &
+		-chardev socket,id=mon,path=${dst_qmp},server=on,wait=off \
+		-mon chardev=mon,mode=control -incoming unix:${dst_incoming} \
+		< <(cat ${dst_infifo}) > ${dst_outfifo} &
 	incoming_pid=$!
-	cat ${migout_fifo2} | tee ${migout2} &
+	cat ${dst_outfifo} | tee ${dst_out} &
 
 	# The test must prompt the user to migrate, so wait for the
 	# "Now migrate VM" console message.
-	while ! grep -q -i "Now migrate the VM" < ${migout1} ; do
+	while ! grep -q -i "Now migrate the VM" < ${src_out} ; do
 		if ! ps -p ${live_pid} > /dev/null ; then
 			echo "ERROR: Test exit before migration point." >&2
-			echo > ${fifo}
-			qmp ${qmp1} '"quit"'> ${qmpout1} 2>/dev/null
-			qmp ${qmp2} '"quit"'> ${qmpout2} 2>/dev/null
+			echo > ${dst_infifo}
+			qmp ${src_qmp} '"quit"'> ${src_qmpout} 2>/dev/null
+			qmp ${dst_qmp} '"quit"'> ${dst_qmpout} 2>/dev/null
 			return 3
 		fi
 		sleep 0.1
 	done
 
 	# Wait until the destination has created the incoming and qmp sockets
-	while ! [ -S ${migsock} ] ; do sleep 0.1 ; done
-	while ! [ -S ${qmp2} ] ; do sleep 0.1 ; done
+	while ! [ -S ${dst_incoming} ] ; do sleep 0.1 ; done
+	while ! [ -S ${dst_qmp} ] ; do sleep 0.1 ; done
 
-	qmp ${qmp1} '"migrate", "arguments": { "uri": "unix:'${migsock}'" }' > ${qmpout1}
+	qmp ${src_qmp} '"migrate", "arguments": { "uri": "unix:'${dst_incoming}'" }' > ${src_qmpout}
 
 	# Wait for the migration to complete
-	migstatus=`qmp ${qmp1} '"query-migrate"' | grep return`
+	migstatus=`qmp ${src_qmp} '"query-migrate"' | grep return`
 	while ! grep -q '"completed"' <<<"$migstatus" ; do
 		sleep 0.1
-		if ! migstatus=`qmp ${qmp1} '"query-migrate"'`; then
+		if ! migstatus=`qmp ${src_qmp} '"query-migrate"'`; then
 			echo "ERROR: Querying migration state failed." >&2
-			echo > ${fifo}
-			qmp ${qmp2} '"quit"'> ${qmpout2} 2>/dev/null
+			echo > ${dst_infifo}
+			qmp ${dst_qmp} '"quit"'> ${dst_qmpout} 2>/dev/null
 			return 2
 		fi
 		migstatus=`grep return <<<"$migstatus"`
 		if grep -q '"failed"' <<<"$migstatus"; then
 			echo "ERROR: Migration failed." >&2
-			echo > ${fifo}
-			qmp ${qmp1} '"quit"'> ${qmpout1} 2>/dev/null
-			qmp ${qmp2} '"quit"'> ${qmpout2} 2>/dev/null
+			echo > ${dst_infifo}
+			qmp ${src_qmp} '"quit"'> ${src_qmpout} 2>/dev/null
+			qmp ${dst_qmp} '"quit"'> ${dst_qmpout} 2>/dev/null
 			return 2
 		fi
 	done
 
-	qmp ${qmp1} '"quit"'> ${qmpout1} 2>/dev/null
+	qmp ${src_qmp} '"quit"'> ${src_qmpout} 2>/dev/null
 
 	# keypress to dst so getchar completes and test continues
-	echo > ${fifo}
-	rm ${fifo}
+	echo > ${dst_infifo}
+	rm ${dst_infifo}
 
 	# Ensure the incoming socket is removed, ready for next destination
-	if [ -S ${migsock} ] ; then
+	if [ -S ${dst_incoming} ] ; then
 		echo "ERROR: Incoming migration socket not removed after migration." >& 2
-		qmp ${qmp2} '"quit"'> ${qmpout2} 2>/dev/null
+		qmp ${dst_qmp} '"quit"'> ${dst_qmpout} 2>/dev/null
 		return 2
 	fi
 
 	wait ${live_pid}
 	ret=$?
 
-	# Now flip the variables because dest becomes source
+	# Now flip the variables because destination machine becomes source
+	# for the next migration.
 	live_pid=${incoming_pid}
-	tmp=${migout1}
-	migout1=${migout2}
-	migout2=${tmp}
-	tmp=${migout_fifo1}
-	migout_fifo1=${migout_fifo2}
-	migout_fifo2=${tmp}
-	tmp=${qmp1}
-	qmp1=${qmp2}
-	qmp2=${tmp}
+	tmp=${src_out}
+	src_out=${dst_out}
+	dst_out=${tmp}
+	tmp=${src_outfifo}
+	src_outfifo=${dst_outfifo}
+	dst_outfifo=${tmp}
+	tmp=${src_qmp}
+	src_qmp=${dst_qmp}
+	dst_qmp=${tmp}
 
 	return $ret
 }
@@ -280,8 +281,8 @@ run_panic ()
 	qmp=$(mktemp -u -t panic-qmp.XXXXXXXXXX)
 
 	# start VM stopped so we don't miss any events
-	eval "$@" -chardev socket,id=mon1,path=${qmp},server=on,wait=off \
-		-mon chardev=mon1,mode=control -S &
+	eval "$@" -chardev socket,id=mon,path=${qmp},server=on,wait=off \
+		-mon chardev=mon,mode=control -S &
 
 	panic_event_count=$(qmp_events ${qmp} | jq -c 'select(.event == "GUEST_PANICKED")' | wc -l)
 	if [ "$panic_event_count" -lt 1 ]; then
-- 
2.42.0