From 154d28dd99da6fd3aef2621ead327c09c0d87bb6 Mon Sep 17 00:00:00 2001
From: Qu Wenruo <quwenruo@cn.fujitsu.com>
Date: Mon, 22 Feb 2016 14:59:57 +0800
Subject: [PATCH] btrfs-progs: misc-test: Add regression test for find-root
 gives empty result

Add regression test for btrfs-find-root gives empty result even the fs
is OK.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
[ enhanced test ]
Signed-off-by: David Sterba <dsterba@suse.com>
---
 .../first_meta_chunk.btrfs-image              | Bin 0 -> 4096 bytes
 .../012-find-root-no-result/test.sh           |  24 ++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 tests/misc-tests/012-find-root-no-result/first_meta_chunk.btrfs-image
 create mode 100755 tests/misc-tests/012-find-root-no-result/test.sh

diff --git a/tests/misc-tests/012-find-root-no-result/first_meta_chunk.btrfs-image b/tests/misc-tests/012-find-root-no-result/first_meta_chunk.btrfs-image
new file mode 100644
index 0000000000000000000000000000000000000000..7bf6c50916f68ed00dae7627e848a91abf5455bb
GIT binary patch
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diff --git a/tests/misc-tests/012-find-root-no-result/test.sh b/tests/misc-tests/012-find-root-no-result/test.sh
new file mode 100755
index 00000000..983a8a1e
--- /dev/null
+++ b/tests/misc-tests/012-find-root-no-result/test.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+# Regression test for case btrfs-find-root may print no result on a
+# recent fs or balanced fs, whose metadata chunk is the first chunk
+# and the only metadata chunk
+
+source $TOP/tests/common
+
+check_prereq btrfs-find-root
+check_prereq btrfs-image
+
+run_check $TOP/btrfs-image -r first_meta_chunk.btrfs-image test.img || \
+	_fail "failed to extract first_meta_chunk.btrfs-image"
+
+result=$(run_check_stdout $TOP/btrfs-find-root test.img | sed '/^Superblock/d')
+
+if [ -z "$result" ]; then
+	_fail "btrfs-find-root failed to find tree root"
+fi
+
+if ! echo "$result" | grep -q 'Found tree root at'; then
+	_fail "btrfs-find-root failed to find tree root, unexpected output"
+fi
+
+rm test.img