[OE-core] [PATCH 1/1] kernel-grub.bbclass: a method to install/update for bzImage
Saul Wold
sgw at linux.intel.com
Wed Oct 16 17:54:15 UTC 2013
On 09/18/2013 12:26 AM, Hongxu Jia wrote:
> While installing a rpm to update kernel on a deployed target, it will update
> the boot area and the boot menu with the kernel as the priority but allow
> you to fall back to the original kernel as well.
>
Will this work for deb or ipk?
Sau!
> - In kernel-image's preinstall scriptlet, it backs up original kernel to avoid
> probable confliction with the new one.
> - In kernel-image's postinstall scriptlet, it modify grub's config file to
> updates the new kernel as the boot priority.
>
> [YOCTO #4104]
>
> Signed-off-by: Hongxu Jia <hongxu.jia at windriver.com>
> ---
> meta/classes/kernel-grub.bbclass | 79 ++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 79 insertions(+)
> create mode 100644 meta/classes/kernel-grub.bbclass
>
> diff --git a/meta/classes/kernel-grub.bbclass b/meta/classes/kernel-grub.bbclass
> new file mode 100644
> index 0000000..21fcabe
> --- /dev/null
> +++ b/meta/classes/kernel-grub.bbclass
> @@ -0,0 +1,79 @@
> +#
> +# While installing a rpm to update kernel on a deployed target, it will update
> +# the boot area and the boot menu with the kernel as the priority but allow
> +# you to fall back to the original kernel as well.
> +#
> +# - In kernel-image's preinstall scriptlet, it backs up original kernel to avoid
> +# probable confliction with the new one.
> +#
> +# - In kernel-image's postinstall scriptlet, it modify grub's config file to
> +# updates the new kernel as the boot priority.
> +#
> +
> +pkg_preinst_kernel-image_append () {
> + if [ -z "$D" ]; then
> + # Parsing confliction
> + [ -f /boot/grub/menu.list ] && grubcfg="/boot/grub/menu.list"
> + [ -f /boot/grub/grub.cfg ] && grubcfg="/boot/grub/grub.cfg"
> + if [ -n "$grubcfg" ]; then
> + # Dereference symlink to avoid confliction with new kernel name.
> + if grep -q "/${KERNEL_IMAGETYPE} root=" $grubcfg; then
> + kimage=`realpath /boot/${KERNEL_IMAGETYPE}`;
> + sed -i "s#${KERNEL_IMAGETYPE} root=#${kimage##*/} root=#" $grubcfg
> + fi
> +
> + # Rename old kernel if it conflicts with new kernel name.
> + if grep -q "/${KERNEL_IMAGETYPE}-${KERNEL_VERSION} root=" $grubcfg; then
> + timestamp=`date +%s`
> + kimage="/boot/${KERNEL_IMAGETYPE}-${KERNEL_VERSION}-$timestamp-back"
> + sed -i "s#${KERNEL_IMAGETYPE}-${KERNEL_VERSION} root=#${kimage##*/} root=#" $grubcfg
> + mv /boot/${KERNEL_IMAGETYPE}-${KERNEL_VERSION} $kimage
> + fi
> + fi
> + fi
> +}
> +
> +pkg_postinst_kernel-image_prepend () {
> + get_new_grub_cfg() {
> + title="Update ${KERNEL_IMAGETYPE}-${KERNEL_VERSION}-${PV}"
> + if [ -f /boot/grub/grub.cfg ]; then
> + rootfs=`grep " *linux [^ ].* root=" /boot/grub/grub.cfg -m 1 | \
> + sed "s# *linux [^ ].* root=# linux /${KERNEL_IMAGETYPE}-${KERNEL_VERSION} root=#"`
> +
> + echo "menuentry \"$title\" {"
> + echo " set root=(hd0,1)"
> + echo "$rootfs"
> + echo "}"
> + elif [ -f /boot/grub/menu.list ] ; then
> + rootfs=`grep "kernel [^ ].* root=" /boot/grub/menu.list -m 1 | \
> + sed "s#kernel [^ ].* root=#kernel /${KERNEL_IMAGETYPE}-${KERNEL_VERSION} root=#"`
> +
> + echo "default 0"
> + echo "timeout 30"
> + echo "title $title"
> + echo "root (hd0,0)"
> + echo "$rootfs"
> + fi
> + }
> +
> + get_old_grub_cfg() {
> + if [ -f /boot/grub/grub.cfg ]; then
> + cat /boot/grub/grub.cfg
> + elif [ -f /boot/grub/menu.list ] ; then
> + cat /boot/grub/menu.list | sed -e '/^default/d' -e '/^timeout/d'
> + fi
> + }
> +
> + if [ -z "$D" ]; then
> + [ -f /boot/grub/menu.list ] && grubcfg="/boot/grub/menu.list"
> + [ -f /boot/grub/grub.cfg ] && grubcfg="/boot/grub/grub.cfg"
> + if [ -n "$grubcfg" ]; then
> + grubcfgtmp="$grubcfg.tmp"
> + get_new_grub_cfg > $grubcfgtmp
> + get_old_grub_cfg >> $grubcfgtmp
> + mv $grubcfgtmp $grubcfg
> + echo "Caution! Update kernel may affect kernel-module!"
> + fi
> + fi
> +}
> +
>
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