10c66c
#!/bin/bash --norc
10c66c
# Generate an initramfs image that isolates dump capture capability within
10c66c
# the default initramfs using zz-fadumpinit dracut module.
10c66c
10c66c
if [ -f /etc/sysconfig/kdump ]; then
10c66c
	. /etc/sysconfig/kdump
10c66c
fi
10c66c
10c66c
[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
10c66c
. $dracutbasedir/dracut-functions.sh
10c66c
. /lib/kdump/kdump-lib.sh
10c66c
. /lib/kdump/kdump-logger.sh
10c66c
10c66c
#initiate the kdump logger
10c66c
if ! dlog_init; then
10c66c
	echo "mkfadumprd: failed to initiate the kdump logger."
10c66c
	exit 1
10c66c
fi
10c66c
10c66c
readonly MKFADUMPRD_TMPDIR="$(mktemp -d -t mkfadumprd.XXXXXX)"
10c66c
[ -d "$MKFADUMPRD_TMPDIR" ] || perror_exit "mkfadumprd: mktemp -d -t mkfadumprd.XXXXXX failed."
10c66c
trap '
10c66c
    ret=$?;
10c66c
    [[ -d $MKFADUMPRD_TMPDIR ]] && rm --one-file-system -rf -- "$MKFADUMPRD_TMPDIR";
10c66c
    exit $ret;
10c66c
    ' EXIT
10c66c
10c66c
# clean up after ourselves no matter how we die.
10c66c
trap 'exit 1;' SIGINT
10c66c
10c66c
MKDUMPRD="/sbin/mkdumprd -f"
10c66c
# Default boot initramfs to be rebuilt
10c66c
REBUILD_INITRD="$1" && shift
10c66c
TARGET_INITRD="$1" && shift
10c66c
FADUMP_INITRD="$MKFADUMPRD_TMPDIR/fadump.img"
10c66c
10c66c
### First build an initramfs with dump capture capability
10c66c
# this file tells the initrd is fadump enabled
10c66c
touch "$MKFADUMPRD_TMPDIR/fadump.initramfs"
10c66c
ddebug "rebuild fadump initrd: $FADUMP_INITRD $DEFAULT_INITRD $KDUMP_KERNELVER"
10c66c
if ! $MKDUMPRD "$FADUMP_INITRD" -i "$MKFADUMPRD_TMPDIR/fadump.initramfs" /etc/fadump.initramfs; then
10c66c
	perror_exit "mkfadumprd: failed to build image with dump capture support"
10c66c
fi
10c66c
10c66c
### Unpack the initramfs having dump capture capability
10c66c
mkdir -p "$MKFADUMPRD_TMPDIR/fadumproot"
10c66c
if ! (pushd "$MKFADUMPRD_TMPDIR/fadumproot" > /dev/null && lsinitrd --unpack "$FADUMP_INITRD" && \
10c66c
	popd > /dev/null); then
10c66c
	derror "mkfadumprd: failed to unpack '$MKFADUMPRD_TMPDIR'"
10c66c
	exit 1
10c66c
fi
10c66c
10c66c
### Pack it into the normal boot initramfs with zz-fadumpinit module
10c66c
_dracut_isolate_args="--rebuild $REBUILD_INITRD --add zz-fadumpinit \
10c66c
	-i $MKFADUMPRD_TMPDIR/fadumproot /fadumproot \
10c66c
	-i $MKFADUMPRD_TMPDIR/fadumproot/usr/lib/dracut/loaded-kernel-modules.txt
10c66c
	   /usr/lib/dracut/fadump-kernel-modules.txt"
10c66c
10c66c
if is_squash_available; then
10c66c
	_dracut_isolate_args="$_dracut_isolate_args --add squash"
10c66c
fi
10c66c
if ! dracut --force --quiet $_dracut_isolate_args $@ "$TARGET_INITRD"; then
10c66c
	perror_exit "mkfadumprd: failed to setup '$TARGET_INITRD' with dump capture capability"
10c66c
fi