metrics: Add function keyword to to helper metrics functions

Use the 'function' keyword to prevent bash aliases from colliding
with other function's name.

Signed-off-by: David Esparza <david.esparza.borquez@intel.com>

tests/metrics/lib/common.bash

@@ -47,14 +47,14 @@ quay.io/libpod"
 #
 # cmds=(“cmd1” “cmd2”)
 # check_cmds "${cmds[@]}"
-check_cmds()
+function check_cmds()
 {
 	local cmd req_cmds=( "$@" )
 	for cmd in "${req_cmds[@]}"; do
 		if ! command -v "$cmd" > /dev/null 2>&1; then
 			die "command $cmd not available"
 		fi
-		echo "command: $cmd: yes"
+		info "command: $cmd: yes"
 	done
 }
 
@@ -68,19 +68,20 @@ check_cmds()
 #
 # images=(“img1” “img2”)
 # check_imgs "${images[@]}"
-check_images()
+function check_images()
 {
 	local img req_images=( "$@" )
 	for img in "${req_images[@]}"; do
-		echo "ctr pull'ing: $img"
+		info "ctr pull'ing: $img"
 		if ! sudo "${CTR_EXE}" image pull "$img"; then
 			die "Failed to pull image $img"
 		fi
-		echo "ctr pull'd: $img"
+		info "ctr pull'd: $img"
 	done
 }
 
-generate_build_dockerfile() {
+function generate_build_dockerfile()
+{
 	local dockerfile="$1"
 	local image="$2"
 	local map_key="$3"
@@ -99,14 +100,14 @@ generate_build_dockerfile() {
 # This function performs a build on the image names
 # passed in, to ensure that we have the latest changes from
 # the dockerfiles
-build_dockerfile_image()
+function build_dockerfile_image()
 {
 	local image="$1"
 	local dockerfile_path="$2"
 	local dockerfile_dir=${2%/*}
 
 	if [ -f "$dockerfile_path" ]; then
-		echo "docker building $image"
+		info "docker building $image"
 		if ! sudo "${DOCKER_EXE}" build --build-arg http_proxy="${http_proxy}" --build-arg https_proxy="${https_proxy}" --label "$image" --tag "${image}" -f "$dockerfile_path" "$dockerfile_dir"; then
 			die "Failed to docker build image $image"
 		fi
@@ -119,7 +120,7 @@ build_dockerfile_image()
 
 # This function removes the ctr image, builds a new one using a dockerfile
 # and imports the image from docker to ctr
-check_ctr_images()
+function check_ctr_images()
 {
 	local ctr_image="$1"
 	local dockerfile_path="$2"
@@ -138,7 +139,7 @@ check_ctr_images()
 
 # A one time (per uber test cycle) init that tries to get the
 # system to a 'known state' as much as possible
-metrics_onetime_init()
+function metrics_onetime_init()
 {
 	# The onetime init must be called once, and only once
 	if [ ! -z "$onetime_init_done" ]; then
@@ -155,14 +156,14 @@ metrics_onetime_init()
 
 # Print a banner to the logs noting clearly which test
 # we are about to run
-test_banner()
+function test_banner()
 {
-	echo -e "\n===== starting test [$1] ====="
+	info -e "\n===== starting test [$1] ====="
 }
 
 # Initialization/verification environment. This function makes
 # minimal steps for metrics/tests execution.
-init_env()
+function init_env()
 {
 	test_banner "${TEST_NAME}"
 
@@ -183,7 +184,8 @@ init_env()
 # This function checks if there are containers or
 # shim/proxy/hypervisor processes up, if found, they are
 # killed to start test with clean environment.
-kill_processes_before_start() {
+function kill_processes_before_start()
+{
 	DOCKER_PROCS=$(sudo "${DOCKER_EXE}" ps -q)
 	[[ -n "${DOCKER_PROCS}" ]] && clean_env
 
@@ -195,26 +197,29 @@ kill_processes_before_start() {
 
 # Generate a random name - generally used when creating containers, but can
 # be used for any other appropriate purpose
-random_name() {
+function random_name()
+{
 	mktemp -u kata-XXXXXX
 }
 
-show_system_ctr_state() {
+function show_system_ctr_state()
-	echo "Showing system state:"
+{
-	echo " --Check containers--"
+	info "Showing system state:"
+	info " --Check containers--"
 	sudo "${CTR_EXE}" c list
-	echo " --Check tasks--"
+	info " --Check tasks--"
 	sudo "${CTR_EXE}" task list
 
 	local processes="containerd-shim-kata-v2"
 
 	for p in ${processes}; do
-		echo " --pgrep ${p}--"
+		info " --pgrep ${p}--"
 		pgrep -a ${p}
 	done
 }
 
-common_init(){
+function common_init()
+{
 	if [ "$CTR_RUNTIME" == "io.containerd.kata.v2" ] || [ "$RUNTIME" == "containerd-shim-kata-v2" ]; then
 		extract_kata_env
 	else
@@ -225,17 +230,18 @@ common_init(){
 	fi
 }
 
-
 # Save the current KSM settings so we can restore them later
-save_ksm_settings(){
+function save_ksm_settings()
-	echo "saving KSM settings"
+{
+	info "saving KSM settings"
 	ksm_stored_run=$(cat ${KSM_ENABLE_FILE})
 	ksm_stored_pages=$(cat ${KSM_ENABLE_FILE})
 	ksm_stored_sleep=$(cat ${KSM_ENABLE_FILE})
 }
 
-set_ksm_aggressive(){
+function set_ksm_aggressive()
-	echo "setting KSM to aggressive mode"
+{
+	info "setting KSM to aggressive mode"
 	# Flip the run off/on to ensure a restart/rescan
 	sudo bash -c "echo 0 > ${KSM_ENABLE_FILE}"
 	sudo bash -c "echo ${KSM_AGGRESIVE_PAGES} > ${KSM_PAGES_FILE}"
@@ -245,7 +251,7 @@ set_ksm_aggressive(){
 	if [ "${KATA_HYPERVISOR}" == "qemu" ]; then
 		# Disable virtio-fs and save whether it was enabled previously
 		set_virtio_out=$(sudo -E PATH="$PATH" "${LIB_DIR}/../../.ci/set_kata_config.sh" shared_fs virtio-9p)
-		echo "${set_virtio_out}"
+		info "${set_virtio_out}"
 		grep -q "already" <<< "${set_virtio_out}" || was_virtio_fs=true;
 	fi
 }
@@ -256,8 +262,9 @@ restore_virtio_fs(){
 		info "Not restoring virtio-fs since it wasn't enabled previously"
 }
 
-restore_ksm_settings(){
+function restore_ksm_settings()
-	echo "restoring KSM settings"
+{
+	info "restoring KSM settings"
 	# First turn off the run to ensure if we are then re-enabling
 	# that any changes take effect
 	sudo bash -c "echo 0 > ${KSM_ENABLE_FILE}"
@@ -267,15 +274,17 @@ restore_ksm_settings(){
 	[ "${KATA_HYPERVISOR}" == "qemu" ] && restore_virtio_fs
 }
 
-disable_ksm(){
+function disable_ksm()
-	echo "disabling KSM"
+{
+	info "disabling KSM"
 	sudo bash -c "echo 0 > ${KSM_ENABLE_FILE}"
 	[ "${KATA_HYPERVISOR}" == "qemu" ] && restore_virtio_fs
 }
 
 # See if KSM is enabled.
 # If so, amend the test name to reflect that
-check_for_ksm(){
+function check_for_ksm()
+{
 	if [ ! -f ${KSM_ENABLE_FILE} ]; then
 		return
 	fi
@@ -294,7 +303,8 @@ check_for_ksm(){
 # a full scan has managed to do few new merges)
 #
 # arg1 - timeout in seconds
-wait_ksm_settle(){
+function wait_ksm_settle()
+{
 	[[ "$RUNTIME" == "runc" ]] || [[ "$CTR_RUNTIME" == "io.containerd.runc.v2" ]] && return
 	local t pcnt
 	local oldscan=-1 newscan
@@ -305,7 +315,7 @@ wait_ksm_settle(){
 	# Wait some time for KSM to kick in to avoid early dismissal
 	for ((t=0; t<5; t++)); do
 		pages=$(cat "${KSM_PAGES_SHARED}")
-		[[ "$pages" -ne 0 ]] && echo "Discovered KSM activity" && break
+		[[ "$pages" -ne 0 ]] && info "Discovered KSM activity" && break
 		sleep 1
 	done
 
@@ -315,13 +325,13 @@ wait_ksm_settle(){
 
 		newscan=$(cat /sys/kernel/mm/ksm/full_scans)
 		newpages=$(cat "${KSM_PAGES_SHARED}")
-		[[ "$newpages" -eq 0 ]] && echo "No need to wait for KSM to settle" && return
+		[[ "$newpages" -eq 0 ]] && info "No need to wait for KSM to settle" && return
 
 		if (( newscan != oldscan )); then
-			echo -e "\nnew full_scan ($oldscan to $newscan)"
+			info -e "\nnew full_scan ($oldscan to $newscan)"
 
 			# Do we have a previous scan to compare with
-			echo "check pages $oldpages to $newpages"
+			info "check pages $oldpages to $newpages"
 
 			if (( oldpages != -1 )); then
 				# avoid divide by zero problems
@@ -330,14 +340,14 @@ wait_ksm_settle(){
 					# abs()
 					pcnt=$(( $pcnt * -1 ))
 
-					echo "$oldpages to $newpages is ${pcnt}%"
+					info "$oldpages to $newpages is ${pcnt}%"
 
 					if (( $pcnt <= 5 )); then
-						echo "KSM stabilised at ${t}s"
+						info "KSM stabilised at ${t}s"
 						return
 					fi
 				else
-					echo "$oldpages KSM pages... waiting"
+					info "$oldpages KSM pages... waiting"
 				fi
 			fi
 			oldscan=$newscan
@@ -347,7 +357,7 @@ wait_ksm_settle(){
 		fi
 		sleep 1
 	done
-	echo "Timed out after ${1}s waiting for KSM to settle"
+	info "Timed out after ${1}s waiting for KSM to settle"
 }
 
 common_init