2 # Test btrfs-image with multiple devices filesystem and verify that restoring
3 # the created image works against a single device.
5 source "$TOP/tests/common"
7 check_prereq btrfs-image
8 check_prereq mkfs.btrfs
14 run_check truncate -s 2G dev1
15 run_check truncate -s 2G dev2
18 loop1=$(run_check_stdout $SUDO_HELPER losetup --find --show dev1)
19 loop2=$(run_check_stdout $SUDO_HELPER losetup --find --show dev2)
21 # Create the test file system.
23 run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f $loop1 $loop2
24 run_check $SUDO_HELPER mount $loop1 "$TEST_MNT"
25 run_check $SUDO_HELPER dd bs=1M count=1 if=/dev/zero "of=$TEST_MNT/foobar"
26 orig_md5=$(run_check_stdout md5sum "$TEST_MNT/foobar" | cut -d ' ' -f 1)
27 run_check $SUDO_HELPER umount "$TEST_MNT"
29 # Create the image to restore later.
30 run_check $SUDO_HELPER "$TOP/btrfs-image" $loop1 "$IMAGE"
32 # Wipe out the filesystem from the devices, restore the image on a single
33 # device, check everything works and file foobar is there and with 1Mb of
35 run_check $SUDO_HELPER wipefs -a $loop1
36 run_check $SUDO_HELPER wipefs -a $loop2
38 run_check $SUDO_HELPER $TOP/btrfs-image -r "$IMAGE" $loop1
40 run_check $SUDO_HELPER mount $loop1 "$TEST_MNT"
41 new_md5=$(run_check_stdout md5sum "$TEST_MNT/foobar" | cut -d ' ' -f 1)
42 run_check $SUDO_HELPER umount "$TEST_MNT"
44 # Cleanup loop devices.
45 run_check $SUDO_HELPER losetup -d $loop1
46 run_check $SUDO_HELPER losetup -d $loop2
49 # Compare the file digests.
50 [ $orig_md5 == $new_md5 ] || _fail "File digests do not match"