[PATCH 02/11] btrfs-progs: misc-tests/034: mount the second device if first device mount failed

[damenly.su@gmail.com]

From: Su Yue <Damenly_Su@gmx.com>

The 034 test may fail to mount, and dmesg says open_ctree() failed due
to device missing.

The partly work flow is
step1 loop1 = losetup image1
step2 loop2 = losetup image2
setp3 mount loop1

The dmesg says the loop2 device is missing.
It's possible and known that while step3 is in open_ctree() and
fs_devices->opened is nonzero, loop2 device has not been added into the
fs_devces. Then read_one_chunk() reports that loop2 is missing.

The solution for this test is try to mount loop2 if loop mount failed.

Fixes: 0de2e22ad226 ("btrfs-progs: tests: Add tests for changing fsid feature")
Signed-off-by: Su Yue <Damenly_Su@gmx.com>
---
 tests/misc-tests/034-metadata-uuid/test.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/misc-tests/034-metadata-uuid/test.sh b/tests/misc-tests/034-metadata-uuid/test.sh
index ff51bf22fadf..5fe553705fcf 100755
--- a/tests/misc-tests/034-metadata-uuid/test.sh
+++ b/tests/misc-tests/034-metadata-uuid/test.sh
@@ -173,7 +173,9 @@ failure_recovery() {
 	loop2=$(run_check_stdout $SUDO_HELPER losetup --find --show "$image2")
 
 	# Mount and unmount, on trans commit all disks should be consistent
-	run_check $SUDO_HELPER mount "$loop1" "$TEST_MNT"
+	run_mayfail $SUDO_HELPER mount "$loop1" "$TEST_MNT"
+	[ $? -ne 0 ] && run_check $SUDO_HELPER mount "$loop2" "$TEST_MNT"
+
 	run_check $SUDO_HELPER umount "$TEST_MNT"
 
 	# perform any specific check
-- 
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