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#!/bin/bash
# Test if mkfs.btrfs --rootdir will skip shrinking correctly
source "$TEST_TOP/common"
check_prereq mkfs.btrfs
setup_root_helper
fs_size=$((512 * 1024 * 1024))
bs=$((1024 * 1024))
tmp=$(_mktemp_dir mkfs-rootdir)
prepare_test_dev "$fs_size"
# No shrink case
run_check_mkfs_test_dev --rootdir "$tmp"
run_check_mount_test_dev
# We should be able to write at least half of the fs size data since the fs is
# not shrunk
run_check $SUDO_HELPER dd if=/dev/zero bs="$bs" count=$(($fs_size / $bs / 2)) \
of="$TEST_MNT/file"
run_check_umount_test_dev
# Shrink case
run_check_mkfs_test_dev --rootdir "$tmp" --shrink
run_check_mount_test_dev
run_mustfail "mkfs.btrfs for shrink rootdir" \
$SUDO_HELPER dd if=/dev/zero bs="$bs" count=$(($fs_size / $bs / 2)) \
of="$TEST_MNT/file"
run_check_umount_test_dev
rm -rf -- "$tmp"
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