[PATCH] btrfs-progs: fsck-tests: missing csum test script

["Lakshmipathi.G" <Lakshmipathi.G@giis.co.in>]

Signed-off-by: Lakshmipathi.G <Lakshmipathi.G@giis.co.in>
---
 tests/fsck-tests/027-missing-data-csum/test.sh | 39 ++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100755 tests/fsck-tests/027-missing-data-csum/test.sh

diff --git a/tests/fsck-tests/027-missing-data-csum/test.sh b/tests/fsck-tests/027-missing-data-csum/test.sh
new file mode 100755
index 0000000..6d1dc97
--- /dev/null
+++ b/tests/fsck-tests/027-missing-data-csum/test.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+source $TOP/tests/common
+
+check_prereq btrfs-corrupt-block
+check_prereq mkfs.btrfs
+check_prereq btrfs
+
+setup_root_helper
+prepare_test_dev 512M
+
+
+# simulate missing csum error and repair using init-csum option
+test_csum_corruption()
+{
+	run_check $SUDO_HELPER $TOP/mkfs.btrfs -f $TEST_DEV
+
+	run_check_mount_test_dev
+
+	export DATASET_SIZE=1
+	generate_dataset small
+
+	run_check_umount_test_dev
+
+	# find bytenr
+	bytenr=`$SUDO_HELPER $TOP/btrfs-debug-tree $TEST_DEV | \
+	grep "EXTENT_CSUM EXTENT_CSUM" | \
+	cut -f1 -d')' | awk '{print $6}'`
+
+	# corrupt csum bytenr
+	run_check $SUDO_HELPER $TOP/btrfs-corrupt-block -C $bytenr $TEST_DEV
+
+	$SUDO_HELPER $TOP/btrfs check $TEST_DEV >& /dev/null && \
+			_fail "btrfs check failed to detect missing csum."
+	run_check $SUDO_HELPER $TOP/btrfs check --repair --init-csum $TEST_DEV
+	run_check $SUDO_HELPER $TOP/btrfs check  $TEST_DEV
+}
+
+test_csum_corruption
-- 
2.7.4