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#!/bin/bash
# Test that btrfs-image can dump image correctly for a missing device (RAID1)
#
# At least for RAID1, btrfs-image should be able to handle one missing device
# without any problem
source "$TEST_TOP/common"
check_prereq btrfs-image
check_prereq mkfs.btrfs
check_prereq btrfs
setup_root_helper
setup_loopdevs 2
prepare_loopdevs
dev1=${loopdevs[1]}
dev2=${loopdevs[2]}
# $1: device number to remove (either 1 or 2)
test_missing()
{
local bad_num
local bad_dev
local good_num
local good_dev
bad_num=$1
bad_dev=${loopdevs[$bad_num]}
good_num=$((3 - $bad_num))
good_dev=${loopdevs[$good_num]}
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f -d raid1 -m raid1 "$dev1" "$dev2"
# fill the fs with some data, we could create space cache
run_check $SUDO_HELPER mount "$dev1" "$TEST_MNT"
run_check $SUDO_HELPER dd if=/dev/zero of="$TEST_MNT/a" bs=1M count=10
run_check $SUDO_HELPER dd if=/dev/zero of="$TEST_MNT/b" bs=4k count=1000 conv=sync
run_check $SUDO_HELPER umount "$TEST_MNT"
# make sure we have space cache
if ! run_check_stdout "$TOP/btrfs" inspect dump-tree -t root "$dev1" |
grep -q "EXTENT_DATA"; then
# Normally the above operation should create the space cache.
# If not, it may mean we have migrated to v2 cache by default
_not_run "unable to create v1 space cache"
fi
# now wipe the device
run_check wipefs -fa "$bad_dev"
# we don't care about the image but btrfs-image must not fail
run_check "$TOP/btrfs-image" "$good_dev" /dev/null
}
# Test with either device missing, so we're ensured to hit missing device
test_missing 1
test_missing 2
cleanup_loopdevs
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