[PATCH 2/2] btrfs-progs: fsck-test: add test case where one dir has two links

[Qu Wenruo <wqu@suse.com>]

Make sure btrfs check can detect such problem.

Right now we have no way to fix it yet.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 .../049-dir-hard-link/default.img.xz          | Bin 0 -> 1712 bytes
 tests/fsck-tests/049-dir-hard-link/test.sh    |  19 ++++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 tests/fsck-tests/049-dir-hard-link/default.img.xz
 create mode 100755 tests/fsck-tests/049-dir-hard-link/test.sh

diff --git a/tests/fsck-tests/049-dir-hard-link/default.img.xz b/tests/fsck-tests/049-dir-hard-link/default.img.xz
new file mode 100644
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diff --git a/tests/fsck-tests/049-dir-hard-link/test.sh b/tests/fsck-tests/049-dir-hard-link/test.sh
new file mode 100755
index 000000000000..992ad638bd47
--- /dev/null
+++ b/tests/fsck-tests/049-dir-hard-link/test.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+#
+# Verify that check can detect overlapped dir with 2 links
+#
+# There is a report that btrfs-check doesn't report dir with 2 links as
+# error, and only get caught by tree-checker.
+#
+# Make sure btrfs check can at least detect such error
+
+source "$TEST_TOP/common"
+
+check_prereq btrfs
+
+check_image() {
+	run_mustfail "dir with 2 links not detected" \
+		"$TOP/btrfs" check "$1"
+}
+
+check_all_images
-- 
2.32.0