postmarketos-initramfs: add rd.info arg and reduce logging

Support the rd.info cmdline argument to enable additional info logging,
and reduce the log level of some things to info so we print less
overall.

Signed-off-by: Caleb Connolly <caleb@postmarketos.org>
Part-of: !6172

main/postmarketos-initramfs/init_functions.sh

@@ -93,6 +93,12 @@ parse_cmdline_item() {
 		pmos.usb-storage)
 			usb_storage="$value"
 			;;
+		rd.info)
+			# used by init_functions_2nd.sh which is sourced
+			# after this script.
+			# shellcheck disable=SC2034
+			log_info=y
+			;;
 		[![:alpha:]_]* | [[:alpha:]_]*[![:alnum:]_]*)
 			# invalid shell variable, ignore it
 			;;
@@ -246,6 +252,14 @@ setup_log() {
 	exec > >(tee $log_targets | logger -t "$LOG_PREFIX" -p user.info) 2>&1
 }
 
+info() {
+	if [ "$log_info" != "y" ]; then
+		return
+	fi
+
+	echo "$@"
+}
+
 mount_proc_sys_dev() {
 	# mdev
 	mount -t proc -o nodev,noexec,nosuid proc /proc || echo "Couldn't mount /proc"
@@ -653,7 +667,7 @@ mount_root_partition() {
 
 	echo "Mount root partition ($partition) to /sysroot (read-write) with options ${rootfsopts#,}"
 	type="$(get_partition_type "$partition")"
-	echo "Detected $type filesystem"
+	info "Detected $type filesystem"
 
 	if ! { [ "$type" = "ext4" ] || [ "$type" = "f2fs" ] || [ "$type" = "btrfs" ]; } then
 		echo "ERROR: Detected unsupported '$type' filesystem ($partition)."
@@ -662,7 +676,7 @@ mount_root_partition() {
 	fi
 
 	if ! modprobe "$type"; then
-		echo "INFO: unable to load module '$type' - maybe it's built in"
+		info "Unable to load module '$type' - assuming it's built-in"
 	fi
 	if ! mount -t "$type" -o rw"$rootfsopts" "$partition" /sysroot; then
 		echo "ERROR: unable to mount root partition!"
@@ -679,7 +693,6 @@ mount_root_partition() {
 	fi
 
 	if ! [ -e /sysroot/etc/os-release ]; then
-		echo "ERROR: root partition appeared to mount but does not contain a root filesystem!"
 		show_splash "ERROR: root partition does not contain a root filesystem\\nhttps://postmarketos.org/troubleshooting"
 		fail_halt_boot
 	fi
@@ -696,7 +709,7 @@ run_hooks() {
 	fi
 
 	for hook in "$scriptsdir"/*.sh; do
-		echo "Running initramfs hook: $hook"
+		info "Running initramfs hook: $hook"
 		sh "$hook"
 	done
 }
@@ -709,7 +722,7 @@ setup_usb_network_android() {
 		return
 	fi
 
-	echo "  Setting up USB gadget through android_usb"
+	info "  Setting up USB gadget through android_usb"
 
 	usb_idVendor="$(echo "${deviceinfo_usb_idVendor:-0x18D1}" | sed "s/0x//g")"	# default: Google Inc.
 	usb_idProduct="$(echo "${deviceinfo_usb_idProduct:-0xD001}" | sed "s/0x//g")"	# default: Nexus 4 (fastboot)
@@ -752,12 +765,12 @@ setup_usb_network_configfs() {
 	local skip_udc="$1"
 
 	if ! [ -e "$CONFIGFS" ]; then
-		echo "$CONFIGFS does not exist, skipping configfs usb gadget"
+		info "usb_gadget not found in configfs, skipping gadget setup..."
 		return
 	fi
 
 	if [ -z "$(get_usb_udc)" ]; then
-		echo "  No UDC found, skipping usb gadget"
+		info "No UDC found, skipping gadget setup..."
 		return
 	fi
 
@@ -815,7 +828,7 @@ setup_usb_network() {
 	_marker="/tmp/_setup_usb_network"
 	[ -e "$_marker" ] && return
 	touch "$_marker"
-	echo "Setup usb network"
+	info "Setup usb network"
 	modprobe libcomposite
 	# Run all usb network setup functions (add more below!)
 	setup_usb_network_android
@@ -835,7 +848,7 @@ start_unudhcpd() {
 	fi
 
 	local client_ip="${unudhcpd_client_ip:-172.16.42.2}"
-	echo "Starting unudhcpd with server ip $HOST_IP, client ip: $client_ip"
+	info "Starting unudhcpd with server ip $HOST_IP, client ip: $client_ip"
 
 	# Get usb interface
 	usb_network_function="${deviceinfo_usb_network_function:-ncm.usb0}"
@@ -866,8 +879,8 @@ start_unudhcpd() {
 		return
 	fi
 
-	echo "  Using interface $usb_iface"
-	echo "  Starting the DHCP daemon"
+	info "  Using interface $usb_iface"
+	info "  Starting the DHCP daemon"
 	(
 		unudhcpd -i "$usb_iface" -s "$HOST_IP" -c "$client_ip"
 	) &