common/iopoll

#!/bin/bash
# SPDX-License-Identifier: GPL-3.0+
# Copyright (C) 2017 Jens Axboe
#
# I/O polling helper functions.

. common/shellcheck

_have_fio_with_poll() {
	if ! _have_fio; then
		return 1
	fi
	if ! fio --parse-only --name=test --ioengine=pvsync2 --hipri=1 1>/dev/null 2>&1; then
		SKIP_REASON="Fio does not support polling"
		return 1
	fi
	return 0
}

_test_dev_supports_io_poll() {
	local old_io_poll
	if ! old_io_poll="$(cat "${TEST_DEV_SYSFS}/queue/io_poll" 2>/dev/null)"; then
		SKIP_REASON="kernel does not support polling"
		return 1
	fi
	if ! echo "$old_io_poll" >"${TEST_DEV_SYSFS}/queue/io_poll" 2>/dev/null; then
		SKIP_REASON="$TEST_DEV does not support polling"
		return 1
	fi
	return 0
}

_test_dev_supports_io_poll_delay() {
	local old_io_poll_delay
	if ! old_io_poll_delay="$(cat "${TEST_DEV_SYSFS}/queue/io_poll_delay" 2>/dev/null)"; then
		SKIP_REASON="kernel does not support hybrid polling"
		return 1
	fi
	if ! echo "$old_io_poll_delay" >"${TEST_DEV_SYSFS}/queue/io_poll_delay" 2>/dev/null; then
		SKIP_REASON="$TEST_DEV does not support hybrid polling"
		return 1
	fi
	return 0
}