diff options
Diffstat (limited to 'meta/classes/kernel-grub.bbclass')
-rw-r--r-- | meta/classes/kernel-grub.bbclass | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/meta/classes/kernel-grub.bbclass b/meta/classes/kernel-grub.bbclass new file mode 100644 index 0000000000..85721ffd70 --- /dev/null +++ b/meta/classes/kernel-grub.bbclass | |||
@@ -0,0 +1,91 @@ | |||
1 | # | ||
2 | # While installing a rpm to update kernel on a deployed target, it will update | ||
3 | # the boot area and the boot menu with the kernel as the priority but allow | ||
4 | # you to fall back to the original kernel as well. | ||
5 | # | ||
6 | # - In kernel-image's preinstall scriptlet, it backs up original kernel to avoid | ||
7 | # probable confliction with the new one. | ||
8 | # | ||
9 | # - In kernel-image's postinstall scriptlet, it modifies grub's config file to | ||
10 | # updates the new kernel as the boot priority. | ||
11 | # | ||
12 | |||
13 | pkg_preinst_kernel-image_append () { | ||
14 | # Parsing confliction | ||
15 | [ -f "$D/boot/grub/menu.list" ] && grubcfg="$D/boot/grub/menu.list" | ||
16 | [ -f "$D/boot/grub/grub.cfg" ] && grubcfg="$D/boot/grub/grub.cfg" | ||
17 | if [ -n "$grubcfg" ]; then | ||
18 | # Dereference symlink to avoid confliction with new kernel name. | ||
19 | if grep -q "/${KERNEL_IMAGETYPE} \+root=" $grubcfg; then | ||
20 | if [ -L "$D/boot/${KERNEL_IMAGETYPE}" ]; then | ||
21 | kimage=`realpath $D/boot/${KERNEL_IMAGETYPE} 2>/dev/null` | ||
22 | if [ -f "$D$kimage" ]; then | ||
23 | sed -i "s:${KERNEL_IMAGETYPE} \+root=:${kimage##*/} root=:" $grubcfg | ||
24 | fi | ||
25 | fi | ||
26 | fi | ||
27 | |||
28 | # Rename old kernel if it conflicts with new kernel name. | ||
29 | if grep -q "/${KERNEL_IMAGETYPE}-${KERNEL_VERSION} \+root=" $grubcfg; then | ||
30 | if [ -f "$D/boot/${KERNEL_IMAGETYPE}-${KERNEL_VERSION}" ]; then | ||
31 | timestamp=`date +%s` | ||
32 | kimage="$D/boot/${KERNEL_IMAGETYPE}-${KERNEL_VERSION}-$timestamp-back" | ||
33 | sed -i "s:${KERNEL_IMAGETYPE}-${KERNEL_VERSION} \+root=:${kimage##*/} root=:" $grubcfg | ||
34 | mv "$D/boot/${KERNEL_IMAGETYPE}-${KERNEL_VERSION}" "$kimage" | ||
35 | fi | ||
36 | fi | ||
37 | fi | ||
38 | } | ||
39 | |||
40 | pkg_postinst_kernel-image_prepend () { | ||
41 | get_new_grub_cfg() { | ||
42 | grubcfg="$1" | ||
43 | old_image="$2" | ||
44 | title="Update ${KERNEL_IMAGETYPE}-${KERNEL_VERSION}-${PV}" | ||
45 | if [ "${grubcfg##*/}" = "grub.cfg" ]; then | ||
46 | rootfs=`grep " *linux \+[^ ]\+ \+root=" $grubcfg -m 1 | \ | ||
47 | sed "s#${old_image}#${old_image%/*}/${KERNEL_IMAGETYPE}-${KERNEL_VERSION}#"` | ||
48 | |||
49 | echo "menuentry \"$title\" {" | ||
50 | echo " set root=(hd0,1)" | ||
51 | echo "$rootfs" | ||
52 | echo "}" | ||
53 | elif [ "${grubcfg##*/}" = "menu.list" ]; then | ||
54 | rootfs=`grep "kernel \+[^ ]\+ \+root=" $grubcfg -m 1 | \ | ||
55 | sed "s#${old_image}#${old_image%/*}/${KERNEL_IMAGETYPE}-${KERNEL_VERSION}#"` | ||
56 | |||
57 | echo "default 0" | ||
58 | echo "timeout 30" | ||
59 | echo "title $title" | ||
60 | echo "root (hd0,0)" | ||
61 | echo "$rootfs" | ||
62 | fi | ||
63 | } | ||
64 | |||
65 | get_old_grub_cfg() { | ||
66 | grubcfg="$1" | ||
67 | if [ "${grubcfg##*/}" = "grub.cfg" ]; then | ||
68 | cat "$grubcfg" | ||
69 | elif [ "${grubcfg##*/}" = "menu.list" ]; then | ||
70 | cat "$grubcfg" | sed -e '/^default/d' -e '/^timeout/d' | ||
71 | fi | ||
72 | } | ||
73 | |||
74 | if [ -f "$D/boot/grub/grub.cfg" ]; then | ||
75 | grubcfg="$D/boot/grub/grub.cfg" | ||
76 | old_image=`grep ' *linux \+[^ ]\+ \+root=' -m 1 "$grubcfg" | awk '{print $2}'` | ||
77 | elif [ -f "$D/boot/grub/menu.list" ]; then | ||
78 | grubcfg="$D/boot/grub/menu.list" | ||
79 | old_image=`grep '^kernel \+[^ ]\+ \+root=' -m 1 "$grubcfg" | awk '{print $2}'` | ||
80 | fi | ||
81 | |||
82 | # Don't update grubcfg at first install while old bzImage doesn't exist. | ||
83 | if [ -f "$D/boot/${old_image##*/}" ]; then | ||
84 | grubcfgtmp="$grubcfg.tmp" | ||
85 | get_new_grub_cfg "$grubcfg" "$old_image" > $grubcfgtmp | ||
86 | get_old_grub_cfg "$grubcfg" >> $grubcfgtmp | ||
87 | mv $grubcfgtmp $grubcfg | ||
88 | echo "Caution! Update kernel may affect kernel-module!" | ||
89 | fi | ||
90 | } | ||
91 | |||