[PATCH] block/025: test discard sector alignement and sector size overflow

[Ming Lei <ming.lei@redhat.com>]

This test covers the following two issues:

1) discard sector need to be aligned with logical block size

2) make sure 'sector_t' instead of 'unsigned int' is used when comparing
with discard sector size

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 tests/block/025     | 37 +++++++++++++++++++++++++++++++++++++
 tests/block/025.out |  2 ++
 2 files changed, 39 insertions(+)
 create mode 100755 tests/block/025
 create mode 100644 tests/block/025.out

diff --git a/tests/block/025 b/tests/block/025
new file mode 100755
index 000000000000..32b632431793
--- /dev/null
+++ b/tests/block/025
@@ -0,0 +1,37 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2018 Ming Lei <ming.lei@redhat.com>
+#
+# Check two corener cases of BLKDISCARD.
+#
+# 1) test if discard bio's sector is algined with logical size, fixed by
+#    1adfc5e4136f ("block: make sure discard bio is aligned with logical block size")
+# 2) test 32 bit overflow when comparing discard sector size. Fixed by
+#    4800bf7bc8c72 ("block: fix 32 bit overflow in __blkdev_issue_discard()")
+
+. tests/block/rc
+. common/scsi_debug
+
+DESCRIPTION="check sector alignment and sector size overflow of BLKDISCARD"
+
+requires() {
+	_have_scsi_debug
+}
+
+test() {
+	echo "Running ${TEST_NAME}"
+
+	rm -f "$FULL"
+
+	# Create virtual device with unmap_zeroes_data support
+	if ! _init_scsi_debug virtual_gb=2049 sector_size=4096 lbpws10=1 dev_size_mb=512; then
+		return 1
+	fi
+
+	local dev="/dev/${SCSI_DEBUG_DEVICES[0]}"
+	blkdiscard "$dev"
+
+	_exit_scsi_debug
+
+	echo "Test complete"
+}
diff --git a/tests/block/025.out b/tests/block/025.out
new file mode 100644
index 000000000000..fd9a6d5f70de
--- /dev/null
+++ b/tests/block/025.out
@@ -0,0 +1,2 @@
+Running block/025
+Test complete
-- 
2.9.5