xfstests: Provide dumpe2fs via standard common.config interface

dumpe2fs can be now accessed via $DUMPE2FS_PROG, tests that require it
can check for its availability by _require_dumpe2fs function.

Signed-off-by: Tomas Racek <tracek@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>

common.config

@@ -159,6 +159,7 @@ export KILLALL_PROG="`set_prog_path killall`"
 export INDENT_PROG="`set_prog_path indent`"
 export XFS_COPY_PROG="`set_prog_path xfs_copy`"
 export FSTRIM_PROG="`set_prog_path fstrim`"
+export DUMPE2FS_PROG="`set_prog_path dumpe2fs`"
 
 # Generate a comparable xfsprogs version number in the form of
 # major * 10000 + minor * 100 + release

common.rc

@@ -1826,6 +1826,13 @@ _test_batched_discard()
 	$FSTRIM_PROG ${1} &>/dev/null
 }
 
+_require_dumpe2fs()
+{
+	if [ -z "$DUMPE2FS_PROG" ]; then
+		_notrun "This test requires dumpe2fs utility."
+	fi
+}
+
 ################################################################################
 
 if [ "$iam" != new -a "$iam" != bench ]