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Add the possibility for resuming from disk in initramfs. This allows kernel

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command lines like this:
linux   /boot/vmlinuz-5.2.11-lfs-SVN-20190902 root=UUID=47a81d89-8788-4ec4-99dd-0f3a0943e96b resume=LABEL=MYSWAP ro
initrd  /boot/initrd.img-5.2.11-lfs-1

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@22107 af4574ff-66df-0310-9fd7-8a98e5e911e0
This commit is contained in:
Pierre Labastie 2019-09-07 13:43:10 +00:00
parent 57394c4bfa
commit 2f6d8ec100
1 changed files with 21 additions and 0 deletions
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21
postlfs/filesystems/initramfs.xml
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@ -222,6 +222,9 @@ fi
if [ -d /lib/systemd ]; then
cp -a /lib/systemd $WDIR/lib
fi
if [ -d /lib/elogind ]; then
cp -a /lib/elogind $WDIR/lib
fi
# Install the kernel modules if requested
if [ -n "$KERNEL_VERSION" ]; then
@ -305,6 +308,19 @@ do_mount_root()
fi
}
do_try_resume()
{
case "$resume" in
UUID=* ) eval $resume; resume="/dev/disk/by-uuid/$UUID" ;;
LABEL=*) eval $resume; resume="/dev/disk/by-label/$LABEL" ;;
esac
if $noresume || ! [ -b "$resume" ]; then return; fi
ls -lH "$resume" | ( read x x x x maj min x
echo -n ${maj%,}:$min > /sys/power/resume )
}
init=/sbin/init
root=
rootdelay=
@ -312,6 +328,8 @@ rootfstype=auto
ro="ro"
rootflags=
device=
resume=
noresume=false
mount -n -t devtmpfs devtmpfs /dev
mount -n -t proc proc /proc
@ -327,6 +345,8 @@ for param in $cmdline ; do
rootdelay=* ) rootdelay=${param#rootdelay=} ;;
rootfstype=*) rootfstype=${param#rootfstype=} ;;
rootflags=* ) rootflags=${param#rootflags=} ;;
resume=* ) resume=${param#resume=} ;;
noresume ) noresume=true ;;
ro ) ro="ro" ;;
rw ) ro="rw" ;;
esac
@ -352,6 +372,7 @@ if [ -f /etc/mdadm.conf ] ; then mdadm -As ; fi
if [ -x /sbin/vgchange ] ; then /sbin/vgchange -a y > /dev/null ; fi
if [ -n "$rootdelay" ] ; then sleep "$rootdelay" ; fi
do_try_resume # This function will not return if resuming from disk
do_mount_root
killall -w ${UDEVD##*/}