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#!/bin/bash
# test btrfs-image with a missing device (uses loop devices)
#
# - btrfs-image must not loop indefinetelly
# - btrfs-image will expectedly fail to produce the dump
source $TOP/tests/common
check_prereq btrfs-show-super
check_prereq btrfs-image
check_prereq mkfs.btrfs
check_prereq btrfs
ndevs=2
declare -a devs
dev1=
dev2=
setup_root_helper
# TODO: move the helpers to common
prepare_devices()
{
for i in `seq $ndevs`; do
touch img$i
chmod a+rw img$i
truncate -s0 img$i
truncate -s2g img$i
devs[$i]=`run_check_stdout $SUDO_HELPER losetup --find --show img$i`
done
}
cleanup_devices()
{
for dev in ${devs[@]}; do
run_mayfail $SUDO_HELPER losetup -d $dev
done
for i in `seq $ndevs`; do
truncate -s0 img$i
done
run_check $SUDO_HELPER losetup --list
}
test_image_dump()
{
run_check $SUDO_HELPER $TOP/btrfs check $dev1
# the output file will be deleted
run_mayfail $SUDO_HELPER $TOP/btrfs-image $dev1 /tmp/test-img.dump
}
test_run()
{
run_check $SUDO_HELPER $TOP/mkfs.btrfs -f -d raid1 -m raid1 $dev1 $dev2
# we need extents to trigger reading from all devices
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
test_image_dump
run_check btrfs fi show $dev1
# create a degraded raid1 filesystem, check must succeed
# btrfs-image must not loop
run_mayfail wipefs -a $dev2
run_check $SUDO_HELPER losetup -d $dev2
run_check btrfs fi show $dev1
test_image_dump
}
prepare_devices
dev1=${devs[1]}
dev2=${devs[2]}
test_run
cleanup_devices
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