[PATCH] btrfs-progs: tests: add convert test case for block number overflow

[Srivathsa Dara <srivathsa.d.dara@oracle.com>]

This test cases will test whether btrfs-convert can handle ext4
filesystems that are largerthan 16TiB.

At 16TiB block numbers overflow 32 bits, btrfs-convert either fails or
corrupts fs if 64 bit block numbers are not supported.

Signed-off-by: Srivathsa Dara <srivathsa.d.dara@oracle.com>
---
 .../025-64-bit-block-numbers/test.sh          | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100755 tests/convert-tests/025-64-bit-block-numbers/test.sh

diff --git a/tests/convert-tests/025-64-bit-block-numbers/test.sh b/tests/convert-tests/025-64-bit-block-numbers/test.sh
new file mode 100755
index 00000000..0eb6bb49
--- /dev/null
+++ b/tests/convert-tests/025-64-bit-block-numbers/test.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+# Check if btrfs-convert can handle 64 bit block numbers in an ext4 fs.
+# At 16TiB block numbers overflow 32 bits and screw up total size and used
+# space calculation
+
+
+source "$TEST_TOP/common" || exit
+source "$TEST_TOP/common.convert" || exit
+
+check_prereq btrfs-convert
+check_global_prereq mke2fs
+
+setup_root_helper
+prepare_test_dev 16t
+
+convert_test_prep_fs ext4 mke2fs -t ext4 -b 4096
+run_check_umount_test_dev
+
+convert_test_do_convert
+run_check_mount_test_dev
+run_check_umount_test_dev
-- 
2.39.3