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#!/bin/bash
# Test btrfs-image with multiple devices filesystem and verify that restoring
# the created image works against a single device.
source "$TEST_TOP/common"
check_prereq btrfs-image
check_prereq mkfs.btrfs
check_prereq btrfs
setup_root_helper
setup_loopdevs 3
prepare_loopdevs
loop1=${loopdevs[1]}
loop2=${loopdevs[2]}
loop3=${loopdevs[3]}
# Create the test file system.
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$loop1" "$loop2"
run_check $SUDO_HELPER mount "$loop1" "$TEST_MNT"
run_check $SUDO_HELPER dd bs=1M count=1 if=/dev/zero of="$TEST_MNT/foobar"
orig_md5=$(run_check_stdout stat "$TEST_MNT/foobar" | md5sum | cut -d ' ' -f 1)
run_check $SUDO_HELPER umount "$TEST_MNT"
# Create the image to restore later.
run_check $SUDO_HELPER "$TOP/btrfs-image" "$loop1" "$IMAGE"
# Wipe out the filesystem from the devices, restore the image on a single
# device, check everything works and file foobar is there and with 1Mb of
# zeroes.
run_check $SUDO_HELPER wipefs -a "$loop1"
run_check $SUDO_HELPER wipefs -a "$loop2"
run_check $SUDO_HELPER "$TOP/btrfs-image" -r "$IMAGE" "$loop3"
# Run check to make sure there is nothing wrong for the recovered image
run_check $SUDO_HELPER "$TOP/btrfs" check "$loop3"
run_check $SUDO_HELPER mount "$loop3" "$TEST_MNT"
new_md5=$(run_check_stdout stat "$TEST_MNT/foobar" | md5sum | cut -d ' ' -f 1)
run_check $SUDO_HELPER umount "$TEST_MNT"
cleanup_loopdevs
# Compare the file digests.
[ "$orig_md5" == "$new_md5" ] || _fail "File digests do not match"
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