[PATCH blktests v6 2/2] nvme/048: test queue count changes on reconnect

[Shin'ichiro Kawasaki]

On Apr 06, 2023 / 10:30, Daniel Wagner wrote:
> The target is allowed to change the number of I/O queues. Test if the
> host is able to reconnect in this scenario.
> 
> Signed-off-by: Daniel Wagner <dwagner at suse.de>
> ---
>  tests/nvme/048     | 125 +++++++++++++++++++++++++++++++++++++++++++++
>  tests/nvme/048.out |   3 ++
>  2 files changed, 128 insertions(+)
>  create mode 100755 tests/nvme/048
>  create mode 100644 tests/nvme/048.out
> 
> diff --git a/tests/nvme/048 b/tests/nvme/048
> new file mode 100755
> index 000000000000..926f9f3de955
> --- /dev/null
> +++ b/tests/nvme/048
> @@ -0,0 +1,125 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-3.0+
> +# Copyright (C) 2023 Daniel Wagner, SUSE Labs
> +#
> +# Test queue count changes on reconnect
> +
> +. tests/nvme/rc
> +
> +DESCRIPTION="Test queue count changes on reconnect"
> +
> +requires() {
> +	_nvme_requires
> +	_have_loop
> +	_require_nvme_trtype tcp rdma fc
> +	_require_min_cpus 2
> +}
> +
> +nvmf_wait_for_state() {
> +	local def_state_timeout=5
> +	local subsys_name="$1"
> +	local state="$2"
> +	local timeout="${3:-$def_state_timeout}"
> +	local nvmedev
> +	local state_file
> +	local start_time
> +	local end_time
> +
> +	nvmedev=$(_find_nvme_dev "${subsys_name}")
> +	state_file="/sys/class/nvme-fabrics/ctl/${nvmedev}/state"
> +
> +	start_time=$(date +%s)
> +	while ! grep -q "${state}" "${state_file}"; do
> +		sleep 1
> +		end_time=$(date +%s)
> +                if (( end_time - start_time > timeout )); then

Nit: the line above has spaces instead of tabs.

> +			echo "expected state \"${state}\" not " \
> +				"reached within ${timeout} seconds"
> +			return 1
> +		fi
> +	done
> +
> +	return 0
> +}
> +
> +set_nvmet_attr_qid_max() {
> +	local nvmet_subsystem="$1"
> +	local qid_max="$2"
> +	local cfs_path="${NVMET_CFS}/subsystems/${nvmet_subsystem}"
> +
> +	echo "${qid_max}" > "${cfs_path}/attr_qid_max"
> +}
> +
> +set_qid_max() {
> +	local port="$1"
> +	local subsys_name="$2"
> +	local qid_max="$3"
> +
> +	set_nvmet_attr_qid_max "${subsys_name}" "${qid_max}"
> +
> +	# Setting qid_max forces a disconnect and the reconntect attempt starts
> +	nvmf_wait_for_state "${subsys_name}" "connecting" || return 1
> +	nvmf_wait_for_state "${subsys_name}" "live" || return 1
> +
> +	return 0
> +}
> +
> +test() {
> +	local subsys_name="blktests-subsystem-1"
> +	local cfs_path="${NVMET_CFS}/subsystems/${subsys_name}"
> +	local file_path="${TMPDIR}/img"
> +	local skipped=false
> +	local hostnqn
> +	local hostid
> +	local port
> +
> +	echo "Running ${TEST_NAME}"
> +
> +	hostid="$(uuidgen)"
> +	if [ -z "$hostid" ] ; then
> +		echo "uuidgen failed"
> +		return 1
> +	fi
> +	hostnqn="nqn.2014-08.org.nvmexpress:uuid:${hostid}"
> +
> +	truncate -s 512M "${file_path}"
> +
> +	_create_nvmet_subsystem "${subsys_name}" "${file_path}" \
> +		"b92842df-a394-44b1-84a4-92ae7d112861"
> +	port="$(_create_nvmet_port "${nvme_trtype}")"
> +	_add_nvmet_subsys_to_port "${port}" "${subsys_name}"
> +	_create_nvmet_host "${subsys_name}" "${hostnqn}"
> +
> +	if [[ -f "${cfs_path}/attr_qid_max" ]] ; then
> +		_nvme_connect_subsys "${nvme_trtype}" "${subsys_name}" \
> +					--hostnqn "${hostnqn}" \
> +					--hostid "${hostid}" \
> +					--keep-alive-tmo 1 \
> +					--reconnect-delay 2
> +
> +		if ! nvmf_wait_for_state "${subsys_name}" "live" ; then
> +			echo FAIL
> +		else
> +			set_qid_max "${port}" "${subsys_name}" 1 || echo FAIL
> +			set_qid_max "${port}" "${subsys_name}" 128 || echo FAIL
> +		fi
> +
> +		_nvme_disconnect_subsys "${subsys_name}"
> +	else
> +		SKIP_REASONS+=("missing attr_qid_max feature")
> +		skipped=true
> +	fi
> +
> +	_remove_nvmet_subsystem_from_port "${port}" "${subsys_name}"
> +	_remove_nvmet_subsystem "${subsys_name}"
> +	_remove_nvmet_port "${port}"
> +	_remove_nvmet_host "${hostnqn}"
> +
> +	rm "${file_path}"
> +
> +	if [[ "${skipped}" = true ]] ; then
> +		return 1
> +	fi
> +
> +	echo "Test complete"
> +}
> diff --git a/tests/nvme/048.out b/tests/nvme/048.out
> new file mode 100644
> index 000000000000..7f986ef9637d
> --- /dev/null
> +++ b/tests/nvme/048.out
> @@ -0,0 +1,3 @@
> +Running nvme/048
> +NQN:blktests-subsystem-1 disconnected 1 controller(s)
> +Test complete
> -- 
> 2.40.0
>