Use compressed squashfs for kernel (#1418)

* Add squashfs with LZ4 and LZO compression to Barebox

* Add squashfs with LZO compression to U-Boot

* Use squashfs for Linux kernel partition

Generate a squashfs image with LZO compression for the Linux kernel
partition. Adjust the boot scripts to be file system independent commands
to boot from squashfs.

buildroot-external/board/asus/tinker/uboot-boot.ush

@@ -64,7 +64,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_A_LEFT} -gt 0; then
       setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1
       echo "Trying to boot slot A, ${BOOT_A_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load mmc ${devnum}:2 ${kernel_addr_r} zImage; then
+      if load mmc ${devnum}:2 ${kernel_addr_r} zImage; then
           setenv bootargs "${bootargs_hassos} ${bootargs_a} rauc.slot=A ${cmdline}"
       fi
     fi
@@ -72,7 +72,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_B_LEFT} -gt 0; then
       setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1
       echo "Trying to boot slot B, ${BOOT_B_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load mmc ${devnum}:4 ${kernel_addr_r} zImage; then
+      if load mmc ${devnum}:4 ${kernel_addr_r} zImage; then
           setenv bootargs "${bootargs_hassos} ${bootargs_b} rauc.slot=B ${cmdline}"
       fi
     fi

buildroot-external/board/hardkernel/odroid-c2/uboot-boot.ush

@@ -71,7 +71,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_A_LEFT} -gt 0; then
       setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1
       echo "Trying to boot slot A, ${BOOT_A_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load mmc ${devnum}:5 ${kernel_addr_r} Image; then
+      if load mmc ${devnum}:5 ${kernel_addr_r} Image; then
           setenv bootargs "${bootargs_hassos} ${bootargs_a} rauc.slot=A ${cmdline}"
       fi
     fi
@@ -79,7 +79,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_B_LEFT} -gt 0; then
       setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1
       echo "Trying to boot slot B, ${BOOT_B_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load mmc ${devnum}:7 ${kernel_addr_r} Image; then
+      if load mmc ${devnum}:7 ${kernel_addr_r} Image; then
           setenv bootargs "${bootargs_hassos} ${bootargs_b} rauc.slot=B ${cmdline}"
       fi
     fi

buildroot-external/board/hardkernel/odroid-c4/uboot-boot.ush

@@ -71,7 +71,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_A_LEFT} -gt 0; then
       setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1
       echo "Trying to boot slot A, ${BOOT_A_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load mmc ${devnum}:5 ${kernel_addr_r} Image; then
+      if load mmc ${devnum}:5 ${kernel_addr_r} Image; then
           setenv bootargs "${bootargs_hassos} ${bootargs_a} rauc.slot=A ${cmdline}"
       fi
     fi
@@ -79,7 +79,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_B_LEFT} -gt 0; then
       setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1
       echo "Trying to boot slot B, ${BOOT_B_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load mmc ${devnum}:7 ${kernel_addr_r} Image; then
+      if load mmc ${devnum}:7 ${kernel_addr_r} Image; then
           setenv bootargs "${bootargs_hassos} ${bootargs_b} rauc.slot=B ${cmdline}"
       fi
     fi

buildroot-external/board/hardkernel/odroid-n2/uboot-boot.ush

@@ -76,7 +76,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_A_LEFT} -gt 0; then
       setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1
       echo "Trying to boot slot A, ${BOOT_A_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load mmc ${devnum}:5 ${kernel_addr_r} Image; then
+      if load mmc ${devnum}:5 ${kernel_addr_r} Image; then
           setenv bootargs "${bootargs_hassos} ${bootargs_a} rauc.slot=A ${cmdline}"
       fi
     fi
@@ -84,7 +84,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_B_LEFT} -gt 0; then
       setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1
       echo "Trying to boot slot B, ${BOOT_B_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load mmc ${devnum}:7 ${kernel_addr_r} Image; then
+      if load mmc ${devnum}:7 ${kernel_addr_r} Image; then
           setenv bootargs "${bootargs_hassos} ${bootargs_b} rauc.slot=B ${cmdline}"
       fi
     fi

buildroot-external/board/hardkernel/odroid-xu4/uboot-boot.ush

@@ -51,7 +51,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_A_LEFT} -gt 0; then
       setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1
       echo "Trying to boot slot A, ${BOOT_A_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load mmc ${devnum}:5 ${kernel_addr_r} zImage; then
+      if load mmc ${devnum}:5 ${kernel_addr_r} zImage; then
           setenv bootargs "${bootargs_hassos} ${bootargs_a} rauc.slot=A ${cmdline}"
       fi
     fi
@@ -59,7 +59,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_B_LEFT} -gt 0; then
       setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1
       echo "Trying to boot slot B, ${BOOT_B_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load mmc ${devnum}:7 ${kernel_addr_r} zImage; then
+      if load mmc ${devnum}:7 ${kernel_addr_r} zImage; then
           setenv bootargs "${bootargs_hassos} ${bootargs_b} rauc.slot=B ${cmdline}"
       fi
     fi

buildroot-external/board/raspberrypi/uboot-boot.ush

@@ -38,7 +38,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_A_LEFT} -gt 0; then
       setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1
       echo "Trying to boot slot A, ${BOOT_A_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load ${devtype} ${devnum}:2 ${kernel_addr_r} zImage; then
+      if load ${devtype} ${devnum}:2 ${kernel_addr_r} zImage; then
           setenv bootargs "${bootargs_hassos} ${bootargs_rpi} ${bootargs_a} rauc.slot=A"
       fi
     fi
@@ -46,7 +46,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_B_LEFT} -gt 0; then
       setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1
       echo "Trying to boot slot B, ${BOOT_B_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load ${devtype} ${devnum}:4 ${kernel_addr_r} zImage; then
+      if load ${devtype} ${devnum}:4 ${kernel_addr_r} zImage; then
           setenv bootargs "${bootargs_hassos} ${bootargs_rpi} ${bootargs_b} rauc.slot=B"
       fi
     fi

buildroot-external/board/raspberrypi/uboot-boot64.ush

@@ -38,7 +38,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_A_LEFT} -gt 0; then
       setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1
       echo "Trying to boot slot A, ${BOOT_A_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load ${devtype} ${devnum}:2 ${kernel_addr_r} Image; then
+      if load ${devtype} ${devnum}:2 ${kernel_addr_r} Image; then
           setenv bootargs "${bootargs_hassos} ${bootargs_rpi} ${bootargs_a} rauc.slot=A"
       fi
     fi
@@ -46,7 +46,7 @@ for BOOT_SLOT in "${BOOT_ORDER}"; do
     if test ${BOOT_B_LEFT} -gt 0; then
       setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1
       echo "Trying to boot slot B, ${BOOT_B_LEFT} attempts remaining. Loading kernel ..."
-      if ext4load ${devtype} ${devnum}:4 ${kernel_addr_r} Image; then
+      if load ${devtype} ${devnum}:4 ${kernel_addr_r} Image; then
           setenv bootargs "${bootargs_hassos} ${bootargs_rpi} ${bootargs_b} rauc.slot=B"
       fi
     fi

buildroot-external/bootloader/barebox.config

@@ -47,4 +47,8 @@ CONFIG_FS_EXT4=y
 CONFIG_FS_FAT=y
 CONFIG_FS_FAT_WRITE=y
 CONFIG_FS_FAT_LFN=y
+CONFIG_FS_SQUASHFS=y
+CONFIG_SQUASHFS_LZ4=y
+CONFIG_SQUASHFS_LZO=y
 CONFIG_LZ4_DECOMPRESS=y
+CONFIG_LZO_DECOMPRESS=y

buildroot-external/bootloader/barebox/boot/system0

@@ -3,6 +3,6 @@
 global linux.bootargs.dyn.root="root=PARTUUID=8d3d53e3-6d49-4c38-8349-aff6859e82fd rootfstype=squashfs ro"
 
 mkdir -p /mnt/system
-mount -t ext4 /dev/disk*.hassos-kernel0 /mnt/system
+mount /dev/disk*.hassos-kernel0 /mnt/system
 
 global bootm.image="/mnt/system/bzImage"

buildroot-external/bootloader/barebox/boot/system1

@@ -3,6 +3,6 @@
 global linux.bootargs.dyn.root="root=PARTUUID=a3ec664e-32ce-4665-95ea-7ae90ce9aa20 rootfstype=squashfs ro"
 
 mkdir -p /mnt/system
-mount -t ext4 /dev/disk*.hassos-kernel1 /mnt/system
+mount /dev/disk*.hassos-kernel1 /mnt/system
 
 global bootm.image="/mnt/system/bzImage"

buildroot-external/bootloader/uboot.config

@@ -9,9 +9,12 @@ CONFIG_SYS_PROMPT="HAOS> "
 CONFIG_EFI_PARTITION=y
 CONFIG_FS_EXT4=y
 CONFIG_FS_FAT=y
+CONFIG_FS_SQUASHFS=y
 # CONFIG_ENV_IS_IN_FAT is not set
 # CONFIG_ENV_IS_IN_EXT4 is not set
 CONFIG_ENV_IS_NOWHERE=Y
 # CONFIG_EFI_LOADER is not set
 CONFIG_CMD_SETEXPR=y
 CONFIG_CMD_FILEENV=y
+CONFIG_CMD_SQUASHFS=y
+CONFIG_LZO=y

buildroot-external/scripts/hdd-image.sh

@@ -89,14 +89,7 @@ function create_kernel_image() {
 
     # Make image
     rm -f "${kernel_img}"
-    truncate --size="${KERNEL_SIZE}" "${kernel_img}"
+    mksquashfs "${kernel}" "${kernel_img}" -comp lzo
-    mkfs.ext4 -L "hassos-kernel" -E lazy_itable_init=0,lazy_journal_init=0 -O ^64bit "${kernel_img}"
-
-    # Mount / init file structs
-    sudo mkdir -p /mnt/data/
-    sudo mount -o loop "${kernel_img}" /mnt/data
-    sudo cp "${kernel}" /mnt/data/
-    sudo umount /mnt/data
 }
 
 

buildroot-external/scripts/name.sh

@@ -21,7 +21,7 @@ function path_spl_img() {
 }
 
 function path_kernel_img() {
-    echo "${BINARIES_DIR}/kernel.ext4"
+    echo "${BINARIES_DIR}/kernel.img"
 }
 
 function path_boot_img() {

buildroot-external/scripts/ota.sh

@@ -5,7 +5,7 @@ function create_ota_update() {
     local ota_file="$(hassos_image_name raucb)"
     local rauc_folder="${BINARIES_DIR}/rauc"
     local boot="${BINARIES_DIR}/boot.vfat"
-    local kernel="${BINARIES_DIR}/kernel.ext4"
+    local kernel="${BINARIES_DIR}/kernel.img"
     local rootfs="${BINARIES_DIR}/rootfs.squashfs"
     local spl="${BINARIES_DIR}/spl.img"
     local key="/build/key.pem"
@@ -21,7 +21,7 @@ function create_ota_update() {
     rm -rf "${rauc_folder}" "${ota_file}"
     mkdir -p "${rauc_folder}"
 
-    cp -f "${kernel}" "${rauc_folder}/kernel.ext4"
+    cp -f "${kernel}" "${rauc_folder}/kernel.img"
     cp -f "${boot}" "${rauc_folder}/boot.vfat"
     cp -f "${rootfs}" "${rauc_folder}/rootfs.img"
     cp -f "${BR2_EXTERNAL_HASSOS_PATH}/ota/rauc-hook" "${rauc_folder}/hook"
@@ -37,7 +37,7 @@ function create_ota_update() {
         echo "filename=boot.vfat"
         echo "hooks=install"
         echo "[image.kernel]"
-        echo "filename=kernel.ext4"
+        echo "filename=kernel.img"
         echo "[image.rootfs]"
         echo "filename=rootfs.img"
     ) > "${rauc_folder}/manifest.raucm"

buildroot-external/scripts/rauc.sh

@@ -43,7 +43,7 @@ function _write_rauc_system() {
     (
         echo "[slot.kernel.${slot_num}]"
         echo "device=/dev/disk/by-partlabel/hassos-kernel${slot_num}"
-        echo "type=ext4"
+        echo "type=raw"
         echo "bootname=${slot_name}"
 
         echo "[slot.rootfs.${slot_num}]"