image_types.bbclass: replace genext2fs with populate-extfs.sh

* The benefits:
  - Really support ext4

  - Support the sparse file (we lost the sparse file in the image in the
    past, the sparse file became into the common file)

  - Fix the error reported by fsck: (ext2/ext3)
      Inode 1025, i_size is 16384, should be 17408.

  - Have a uniform code for ext2/3/4 generation

* Comments from Darren Hart:
Basically, genext2fs doesn't support creating ext4 filesystems. It
creates, as I understand it, an ext2 filesystem, then adds a journal,
and sets some bits. It can't support the newer features like extents. So
what we end up with is a bit of a hack for a filesystem.

The ext tools (e2fsprogs) unfortunately don't provide an integrated
solution for generating prepopulated filesystem images as many other
mkfs* tools do. One thing missing was symlink support in libext2fs. I
added that support and demonstrated a script which uses the e2fsprogs
debugfs tool that can populate the newly formatted filesystem from a
directory and without root privileges.

[YOCTO #3848]

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>

1 files changed, 18 insertions, 28 deletions

diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass
index 0e5a9a8600..c168ed50e6 100644
--- a/meta/classes/image_types.bbclass
+++ b/meta/classes/image_types.bbclass
@@ -141,34 +141,24 @@ IMAGE_CMD_sum.jffs2 = "${IMAGE_CMD_jffs2} && sumtool -i ${DEPLOY_DIR_IMAGE}/${IM
 
 IMAGE_CMD_cramfs = "mkcramfs ${IMAGE_ROOTFS} ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cramfs ${EXTRA_IMAGECMD}"
 
-IMAGE_CMD_ext2 () {
-	rm -rf ${DEPLOY_DIR_IMAGE}/tmp.gz-${PN} && mkdir ${DEPLOY_DIR_IMAGE}/tmp.gz-${PN}
-	genext2fs -b $ROOTFS_SIZE -d ${IMAGE_ROOTFS} ${EXTRA_IMAGECMD} ${DEPLOY_DIR_IMAGE}/tmp.gz-${PN}/${IMAGE_NAME}.rootfs.ext2
-	mv ${DEPLOY_DIR_IMAGE}/tmp.gz-${PN}/${IMAGE_NAME}.rootfs.ext2 ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ext2
-	rmdir ${DEPLOY_DIR_IMAGE}/tmp.gz-${PN}
-}
+oe_mkext234fs () {
+	fstype=$1
+	extra_imagecmd=""
 
-IMAGE_CMD_ext3 () {
-	genext2fs -b $ROOTFS_SIZE -d ${IMAGE_ROOTFS} ${EXTRA_IMAGECMD} ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ext3
-	tune2fs -j ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ext3
-}
+	if [ $# -gt 1 ]; then
+		shift
+		extra_imagecmd=$@
+	fi
 
-oe_mkext4fs () {
-	genext2fs -b $ROOTFS_SIZE -d ${IMAGE_ROOTFS} ${EXTRA_IMAGECMD} $1
-	tune2fs -O extents,uninit_bg,dir_index,has_journal,filetype $1
-	e2fsck -yfDC0 $1 || chk=$?
-	case $chk in
-	0|1|2)
-	    ;;
-	*)
-	    return $chk
-	    ;;
-	esac
+	# Create a sparse image block
+	dd if=/dev/zero of=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.$fstype seek=$ROOTFS_SIZE count=0 bs=1k
+	mkfs.$fstype -F $extra_imagecmd ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.$fstype
+	populate-extfs.sh ${IMAGE_ROOTFS} ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.$fstype
 }
 
-IMAGE_CMD_ext4 () {
-	oe_mkext4fs ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ext4
-}
+IMAGE_CMD_ext2 = "oe_mkext234fs ext2 ${EXTRA_IMAGECMD}"
+IMAGE_CMD_ext3 = "oe_mkext234fs ext3 ${EXTRA_IMAGECMD}"
+IMAGE_CMD_ext4 = "oe_mkext234fs ext4 ${EXTRA_IMAGECMD}"
 
 IMAGE_CMD_btrfs () {
 	mkfs.btrfs -b `expr ${ROOTFS_SIZE} \* 1024` ${EXTRA_IMAGECMD} -r ${IMAGE_ROOTFS} ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.btrfs
@@ -218,7 +208,7 @@ JFFS2_ENDIANNESS ?= "${@base_conditional('SITEINFO_ENDIANNESS', 'le', '--little-
 JFFS2_ERASEBLOCK ?= "0x40000"
 EXTRA_IMAGECMD_jffs2 ?= "--pad ${JFFS2_ENDIANNESS} --eraseblock=${JFFS2_ERASEBLOCK} --no-cleanmarkers"
 
-# Change these if you want default genext2fs behavior (i.e. create minimal inode number)
+# Change these if you want default mkfs behavior (i.e. create minimal inode number)
 EXTRA_IMAGECMD_ext2 ?= "-i 8192"
 EXTRA_IMAGECMD_ext3 ?= "-i 8192"
 EXTRA_IMAGECMD_ext4 ?= "-i 8192"
@@ -229,9 +219,9 @@ IMAGE_DEPENDS = ""
 IMAGE_DEPENDS_jffs2 = "mtd-utils-native"
 IMAGE_DEPENDS_sum.jffs2 = "mtd-utils-native"
 IMAGE_DEPENDS_cramfs = "cramfs-native"
-IMAGE_DEPENDS_ext2 = "genext2fs-native"
-IMAGE_DEPENDS_ext3 = "genext2fs-native e2fsprogs-native"
-IMAGE_DEPENDS_ext4 = "genext2fs-native e2fsprogs-native"
+IMAGE_DEPENDS_ext2 = "e2fsprogs-native"
+IMAGE_DEPENDS_ext3 = "e2fsprogs-native"
+IMAGE_DEPENDS_ext4 = "e2fsprogs-native"
 IMAGE_DEPENDS_btrfs = "btrfs-tools-native"
 IMAGE_DEPENDS_squashfs = "squashfs-tools-native"
 IMAGE_DEPENDS_squashfs-xz = "squashfs-tools-native"