[PATCH v4 3/4] Add lvm2 thinp support for dump_raw

[Tao Liu]

dump_raw is similar to dump_fs when dumping to lvm2 thinp device.
Except "dd oflag=sync" is used as a substitute of "sync -f vmcore".

Signed-off-by: Tao Liu <ltao(a)redhat.com&gt;
---
 dracut-kdump.sh        | 15 ++++++++++-----
 dracut-module-setup.sh |  6 +++++-
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/dracut-kdump.sh b/dracut-kdump.sh
index 7ec7ebd..456e77d 100755
--- a/dracut-kdump.sh
+++ b/dracut-kdump.sh
@@ -389,12 +389,17 @@ dump_raw()
 		/kdumpscripts/monitor_dd_progress $_src_size_mb &
 	fi
 
-	dinfo "saving vmcore"
-	$CORE_COLLECTOR /proc/vmcore | dd of="$1" bs=$DD_BLKSIZE >>
/tmp/dd_progress_file 2>&1 || return 1
-	sync
+	if is_lvm2_thinp_device "$1"; then
+		/kdumpscripts/monitor_lvm2_thinp_autoextend "$1" "$CORE_COLLECTOR"
"dd" &
+		_mon_pid=$!
+	fi
 
-	dinfo "saving vmcore complete"
-	return 0
+	dinfo "saving vmcore"
+	$CORE_COLLECTOR /proc/vmcore | dd of="$1" bs=$DD_BLKSIZE oflag=sync >>
/tmp/dd_progress_file 2>&1
+	ret=$?
+	[ -n "$_mon_pid" ] && kill $_mon_pid
+	[ $ret -eq 0 ] && dinfo "saving vmcore complete"
+	return $ret
 }
 
 # $1: ssh key file
diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
index db3d91b..1216c4c 100755
--- a/dracut-module-setup.sh
+++ b/dracut-module-setup.sh
@@ -670,7 +670,11 @@ kdump_install_conf() {
         # remove inline comments after the end of a directive.
         case "$_opt" in
             raw)
-                _pdev=$(persistent_policy="by-id" kdump_get_persistent_dev
"$_val")
+                if is_lvm2_thinp_device "$_val"; then
+                    _pdev=$(kdump_get_persistent_dev "$_val")
+                else
+                    _pdev=$(persistent_policy="by-id" kdump_get_persistent_dev
"$_val")
+                fi
                 sed -i -e "s#^${_opt}[[:space:]]\+$_val#$_opt $_pdev#"
"${initdir}/tmp/$$-kdump.conf"
                 ;;
             ext[234] | xfs | btrfs | minix)
-- 
2.33.1