[PATCH 22.03 2/4] ath79: move image check for devices with RedBoot

[Tomasz Maciej Nowak]

From: Tomasz Maciej Nowak <tmn505 at gmail.com>

Don't comence the switch to RAMFS when the image format is wrong. This
led to rebooting the device, which could lead to false impression that
upgrade succeded.
Being here, factor out the code responsible for upgrading RedBoot
devices to separate file.

Signed-off-by: Tomasz Maciej Nowak <tmn505 at gmail.com>
(cherry picked from commit 5897c52e78e3cd3846db083d48dd9d6b47ff3a08)
---
 .../base-files/lib/upgrade/platform.sh        | 46 ++++++-------------
 .../base-files/lib/upgrade/redboot-fis.sh     | 31 +++++++++++++
 2 files changed, 46 insertions(+), 31 deletions(-)
 create mode 100644 target/linux/ath79/generic/base-files/lib/upgrade/redboot-fis.sh

diff --git a/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh b/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh
index 642a9891ff29..f161540a6877 100644
--- a/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh
@@ -8,35 +8,19 @@ REQUIRE_IMAGE_METADATA=1
 RAMFS_COPY_BIN='fw_printenv fw_setenv'
 RAMFS_COPY_DATA='/etc/fw_env.config /var/lock/fw_printenv.lock'
 
-redboot_fis_do_upgrade() {
-	local append
-	local sysup_file="$1"
-	local kern_part="$2"
-	local magic=$(get_magic_word "$sysup_file")
-
-	if [ "$magic" = "7379" ]; then
-		local board_dir=$(tar tf $sysup_file | grep -m 1 '^sysupgrade-.*/$')
-
-		[ -f "$UPGRADE_BACKUP" ] && append="-j $UPGRADE_BACKUP"
-
-		if grep -q "mtd1.*loader" /proc/mtd; then
-			tar xf $sysup_file ${board_dir}kernel ${board_dir}root -O | \
-				mtd -r $append write - loader:firmware
-
-		else
-			local kern_length=$(tar xf $sysup_file ${board_dir}kernel -O | wc -c)
-
-			tar xf $sysup_file ${board_dir}kernel ${board_dir}root -O | \
-				mtd -r $append -F$kern_part:$kern_length:0x80060000,rootfs write - $kern_part:rootfs
-		fi
-	else
-		echo "Unknown image, aborting!"
-		return 1
-	fi
-}
-
 platform_check_image() {
-	return 0
+	local board=$(board_name)
+
+	case "$board" in
+	jjplus,ja76pf2|\
+	ubnt,routerstation|\
+	ubnt,routerstation-pro)
+		platform_check_image_redboot_fis "$1"
+		;;
+	*)
+		return 0
+		;;
+	esac
 }
 
 platform_do_upgrade() {
@@ -45,7 +29,7 @@ platform_do_upgrade() {
 	case "$board" in
 	adtran,bsap1800-v2|\
 	adtran,bsap1840)
-		redboot_fis_do_upgrade "$1" vmlinux_2
+		platform_do_upgrade_redboot_fis "$1" vmlinux_2
 		;;
 	allnet,all-wap02860ac|\
 	araknis,an-300-ap-i-n|\
@@ -66,7 +50,7 @@ platform_do_upgrade() {
 		platform_do_upgrade_failsafe_datachk "$1"
 		;;
 	jjplus,ja76pf2)
-		redboot_fis_do_upgrade "$1" linux
+		platform_do_upgrade_redboot_fis "$1" linux
 		;;
 	openmesh,a40|\
 	openmesh,a60|\
@@ -98,7 +82,7 @@ platform_do_upgrade() {
 		;;
 	ubnt,routerstation|\
 	ubnt,routerstation-pro)
-		redboot_fis_do_upgrade "$1" kernel
+		platform_do_upgrade_redboot_fis "$1" kernel
 		;;
 	*)
 		default_do_upgrade "$1"
diff --git a/target/linux/ath79/generic/base-files/lib/upgrade/redboot-fis.sh b/target/linux/ath79/generic/base-files/lib/upgrade/redboot-fis.sh
new file mode 100644
index 000000000000..f45d9a2e790e
--- /dev/null
+++ b/target/linux/ath79/generic/base-files/lib/upgrade/redboot-fis.sh
@@ -0,0 +1,31 @@
+platform_check_image_redboot_fis() {
+	if [ "$(get_magic_word "$1")" != "7379" ]; then
+		v "Unknown image format, aborting!"
+		return 1
+	else
+		return 0
+	fi
+}
+
+platform_do_upgrade_redboot_fis() {
+	local append
+	local sysup_file="$1"
+	local kern_part="$2"
+
+	if [ "$(get_magic_word "$sysup_file")" = "7379" ]; then
+		local board_dir=$(tar tf $sysup_file | grep -m 1 '^sysupgrade-.*/$')
+
+		[ -f "$UPGRADE_BACKUP" ] && append="-j $UPGRADE_BACKUP"
+
+		if grep -q "mtd1.*loader" /proc/mtd; then
+			tar xf $sysup_file ${board_dir}kernel ${board_dir}root -O | \
+				mtd -r $append write - loader:firmware
+
+		else
+			local kern_length=$(tar xf $sysup_file ${board_dir}kernel -O | wc -c)
+
+			tar xf $sysup_file ${board_dir}kernel ${board_dir}root -O | \
+				mtd -r $append -F$kern_part:$kern_length:0x80060000,rootfs write - $kern_part:rootfs
+		fi
+	fi
+}
-- 
2.37.0