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Empty image: filesystem allocation

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Increase sparse image block size when ROOTFS_SIZE is smaller than
the minimum needed for ext4 to fit into it.

[YOCTO #7664]

(From OE-Core rev: 6938791ff97a23430afb4aa16d71aa8729a12ead)

Signed-off-by: Alex Franco <alejandro.franco@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Alex Franco
2015-08-26 16:57:35 -05:00
committed by Richard Purdie
parent 9b6bf6a41f
commit 0cd5d6dcbb
1 changed files with 9 additions and 1 deletions
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10
meta/classes/image_types.bbclass
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@@ -49,8 +49,16 @@ oe_mkext234fs () {
extra_imagecmd=$@
fi
# If generating an empty image the size of the sparse block should be large
# enough to allocate an ext4 filesystem using 4096 bytes per inode, this is
# about 60K, so dd needs a minimum count of 60, with bs=1024 (bytes per IO)
eval local COUNT=\"0\"
eval local MIN_COUNT=\"60\"
if [ $ROOTFS_SIZE -lt $MIN_COUNT ]; then
eval COUNT=\"$MIN_COUNT\"
fi
# Create a sparse image block
dd if=/dev/zero of=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.$fstype seek=$ROOTFS_SIZE count=0 bs=1k
dd if=/dev/zero of=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.$fstype seek=$ROOTFS_SIZE count=$COUNT bs=1024
mkfs.$fstype -F $extra_imagecmd ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.$fstype -d ${IMAGE_ROOTFS}
}