[SOLVED] current, mkinitrd and uuid

Tonus · 04-10-2016, 02:41 PM

Hi all,

I'm actually failing to have an initrd working with uuid for the resume device.

I run the mkinitrd_command_generator.sh, then replace /dev/sdX with "UUID=XXXXXX".

Then while I wake the computer up, boot messages claim that root has not been correctly unmounted, cleans up and reboot.

Anyone has such an initrd working (with uuid)?
Any advice would be welcome.

Tonus · 04-10-2016, 03:13 PM

Could it be that correct syntax would be resume=UUID=XXXXXX ?

I will have to test that...

atelszewski.versades · 04-11-2016, 02:38 AM

Hi,

Try something like this:

Code:

ROOTDEV="UUID=19b969e6-8e13-4b75-8554-e204d655e074"
RESUMEDEV="/dev/disk/by-uuid/84563c5a-bbab-4dde-8e88-083beddd3fbb"

in your mkinitrd.conf.

Pay attention on to how RESUMEDEV is specified.

--
Best regards,
Andrzej Telszewski

Tonus · 04-11-2016, 08:36 AM

Thanks for your reply, I'll try this as soon as possible.

atelszewski · 04-11-2016, 01:31 PM

Hi,

It basically boils down to how the initrd handles the devices:

Code:

$ grep RESUMEDEV /boot/initrd-tree/init
RESUMEDEV=$(cat /resumedev)
      RESUMEDEV=$(echo $ARG | cut -f2 -d=)
  if [ "$RESUMEDEV" != "" ]; then
    if ls -l $RESUMEDEV | grep -q "^l" ; then
      #RESUMEDEV=$(ls -l $RESUMEDEV | awk '{ print $NF }')
      RESUMEDEV=$(readlink -f $RESUMEDEV)
    echo "Trying to resume from $RESUMEDEV"
    RESMAJMIN=$(ls -l $RESUMEDEV | tr , : | awk '{ print $5$6 }')

Code:

$ grep ROOTDEV /boot/initrd-tree/init
ROOTDEV=$(cat /rootdev)
      ROOTDEV=$(echo $ARG | cut -f2 -d=)
      ROOTDEV=$(echo $ARG | cut -f2- -d=)
      ROOTDEV=$(echo $ARG | cut -f2- -d=)
        if echo $ROOTDEV | grep -q "LABEL=" || echo $ROOTDEV | grep -q "UUID=" ; then
        elif [ "x$ROOTDEV" = "x$(basename $ROOTDEV)" ]; then
          CRYPTDEV="$ROOTDEV"
        if [ "$ROOTDEV" = "$LUKSDEV" -o "$ROOTDEV" = "$CRYPTDEV" ] ; then
          ROOTDEV="/dev/mapper/$CRYPTDEV"
        if echo $ROOTDEV | grep -q "LABEL=" || echo $ROOTDEV | grep -q "UUID=" ; then
        elif [ "x$ROOTDEV" = "x$(basename $ROOTDEV)" ]; then
          CRYPTDEV="$ROOTDEV"
        if [ "$ROOTDEV" = "$LUKSDEV" -o "$ROOTDEV" = "$CRYPTDEV" ] ; then
          ROOTDEV="/dev/mapper/$CRYPTDEV"
  if echo $ROOTDEV | grep -q "LABEL=" || \
     echo $ROOTDEV | grep -q "UUID=" ; then
    ROOTDEV=$(findfs $ROOTDEV)
  mount -o ro -t $ROOTFS $ROOTDEV /mnt

So you can see that for the RESUMEDEV there is nothing about UUID.
You have to depend on device links provided by udev in /dev/disk/by-uuid/.

--
Best regards,
Andrzej Telszewski

Tonus · 04-11-2016, 04:39 PM

Much thanks for the hint, it works :-)

And additionnal thanks for the explanation !

atelszewski · 06-08-2016, 05:54 PM

Hi,

As of Wed Jun 8 21:20:46 UTC 2016, support for UUID/LABEL for resume device has been added.

Neat

--
Best regards,
Andrzej Telszewski