> On Jan 11, 2015, at 9:05 PM, ChenQi <[email protected]> wrote:
>
> On 01/09/2015 11:52 PM, Drew Moseley wrote:
>> Use static device paths for mounting from /dev/disk/<blah> in
>> case the device ordering changes.
>>
>> Signed-off-by: Drew Moseley <[email protected]>
>> ---
>> meta/recipes-core/initrdscripts/files/init-install.sh | 14 ++++++++++----
>> 1 file changed, 10 insertions(+), 4 deletions(-)
>>
>> diff --git a/meta/recipes-core/initrdscripts/files/init-install.sh
>> b/meta/recipes-core/initrdscripts/files/init-install.sh
>> index fb537ee..f924418 100644
>> --- a/meta/recipes-core/initrdscripts/files/init-install.sh
>> +++ b/meta/recipes-core/initrdscripts/files/init-install.sh
>> @@ -156,6 +156,12 @@ mkfs.ext3 $rootfs
>> echo "Formatting swap partition...($swap)"
>> mkswap $swap
>> +# Determine the static device paths
>> +sync; udevadm settle
>> +bootfs_static="$(udevadm info --query=property --name=$bootfs | grep
>> DEVLINKS= | cut -d= -f2 | cut -d\ -f1)"
>> +swap_static="$(udevadm info --query=property --name=$swap | grep DEVLINKS=
>> | cut -d= -f2 | cut -d\ -f1)"
>> +rootfs_uuid="$(udevadm info --query=property --name=$rootfs | grep
>> ID_PART_ENTRY_UUID | cut -d= -f2)"
>> +
>
> Would ID_PART_ENTRY_UUID be always there?
That's a good question. In my test systems (two VirtualBox configs and two AMD
based PCs) it is always there. Taking a second look at my developer Ubuntu
system it does not seem to have that field so maybe I'm just getting lucky on
my test systems.
Anybody have a suggestion for a replacement?
>> mkdir /tgt_root
>> mkdir /src_root
>> mkdir -p /boot
>> @@ -166,8 +172,8 @@ mount -o rw,loop,noatime,nodiratime /run/media/$1/$2
>> /src_root
>> echo "Copying rootfs files..."
>> cp -a /src_root/* /tgt_root
>> if [ -d /tgt_root/etc/ ] ; then
>> - echo "$swap swap swap defaults
>> 0 0" >> /tgt_root/etc/fstab
>> - echo "$bootfs /boot ext3 defaults
>> 1 2" >> /tgt_root/etc/fstab
>> + echo "$swap_static swap swap defaults
>> 0 0" >> /tgt_root/etc/fstab
>> + echo "$bootfs_static /boot ext3 defaults
>> 1 2" >> /tgt_root/etc/fstab
>> # We dont want udev to mount our root device while we're booting...
>> if [ -d /tgt_root/etc/udev/ ] ; then
>> echo "/dev/${device}" >> /tgt_root/etc/udev/mount.blacklist
>> @@ -186,7 +192,7 @@ if [ -f /etc/grub.d/00_header ] ; then
>> cat >$GRUBCFG <<_EOF
>> menuentry "Linux" {
>> set root=(hd0,1)
>> - linux /vmlinuz root=$rootfs $rootwait rw $5 $3 $4 quiet
>> + linux /vmlinuz root=PARTUUID=$rootfs_uuid $rootwait rw $5 $3 $4 quiet
>
> I thought PARTUUID is for GPT only.
>
Perhaps so but it does seem to be there on my VirtualBox systems. My Ubuntu
host uses "root=UUID=blah" but that was't working for me at some point. I'll
dig back into it and see what I can find.
Drew
--
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