From 828f12b965d9bdaa2871b72ae86e443974b0a9b0 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Tue, 29 May 2018 18:55:56 +0200 Subject: [PATCH] dmhugedisk: Allow specifying of chunk size Ext4 will want to use dmhugedisk infrastructure for testing resize bugs. Ext4 fs images are rather sparse (especially with smaller block sizes) so the current chunk size of 512 sectors leads to large space consumption. Allow test to specify chunk size. Signed-off-by: Jan Kara Reviewed-by: Eryu Guan Signed-off-by: Eryu Guan --- common/dmhugedisk | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/common/dmhugedisk b/common/dmhugedisk index 4d3b63fc..733b10cd 100644 --- a/common/dmhugedisk +++ b/common/dmhugedisk @@ -31,6 +31,11 @@ _dmhugedisk_init() { test -z "$1" && _fatal "must specify sector count to _dmhugedisk_init" local dm_backing_dev=$SCRATCH_DEV + local chunk_size="$2" + + if [ -z "$chunk_size" ]; then + chunk_size=512 + fi $DMSETUP_PROG remove huge-test > /dev/null 2>&1 $DMSETUP_PROG remove huge-test-zero > /dev/null 2>&1 @@ -41,7 +46,7 @@ _dmhugedisk_init() DMHUGEDISK_DEV='/dev/mapper/huge-test' DMHUGEDISK_ZERO_TABLE="0 $blk_dev_size zero" - DMHUGEDISK_DEV_TABLE="0 $blk_dev_size snapshot $DMHUGEDISK_ZERO $SCRATCH_DEV N 512" + DMHUGEDISK_DEV_TABLE="0 $blk_dev_size snapshot $DMHUGEDISK_ZERO $SCRATCH_DEV N $chunk_size" $DMSETUP_PROG create huge-test-zero --table "$DMHUGEDISK_ZERO_TABLE" || \ _fatal "failed to create dm huge zero device" -- 2.39.5