Re: [PATCH blktests v1 2/3] nvme/rc: Avoid triggering host nvme-cli autoconnect

Sagi Grimberg
2023-06-20T14:08:00Z

> When the host has enabled the udev/systemd autoconnect services for the
> fc transport it interacts with blktests and make tests break.
>
> nvme-cli learned to ignore connects attemps when using the
> --context command line option paired with a volatile configuration. Thus
> we can mark all the resources created by blktests and avoid any
> interaction with the systemd autoconnect scripts.

Hmm... is this hapenning with non-fc as well?

>
> Signed-off-by: Daniel Wagner <dwagner@suse.de>
> ---
> tests/nvme/rc | 73 ++++++++++++++++++++++++++++++++++++++++++++-------
> 1 file changed, 63 insertions(+), 10 deletions(-)
>
> diff --git a/tests/nvme/rc b/tests/nvme/rc
> index 191f3e2e0c43..00117d314a38 100644
> --- a/tests/nvme/rc
> +++ b/tests/nvme/rc
> @@ -14,8 +14,8 @@ def_remote_wwnn="0x10001100aa000001"
> def_remote_wwpn="0x20001100aa000001"
> def_local_wwnn="0x10001100aa000002"
> def_local_wwpn="0x20001100aa000002"
> -def_hostnqn="$(cat /etc/nvme/hostnqn 2> /dev/null)"
> -def_hostid="$(cat /etc/nvme/hostid 2> /dev/null)"
> +def_hostnqn="nqn.2014-08.org.nvmexpress:uuid:242d4a24-2484-4a80-8234-d0169409c5e8"
> +def_hostid="242d4a24-2484-4a80-8234-d0169409c5e8"
> nvme_trtype=${nvme_trtype:-"loop"}
> nvme_img_size=${nvme_img_size:-"1G"}
> nvme_num_iter=${nvme_num_iter:-"1000"}
> @@ -161,6 +161,50 @@ _nvme_calc_rand_io_size() {
> echo "${io_size_kb}k"
> }
>
> +_nvme_cli_supports_context() {
> + if ! nvme connect --help 2>&1 | grep -q context > /dev/null; then
> + return 1
> + fi
> + return 0
> +}

Not a great way to check support.

> +
> +_setup_nvme_cli() {
> + if ! _nvme_cli_supports_context; then
> + return
> + fi
> +
> + mkdir -p /run/nvme
> + cat >> /run/nvme/blktests.json <<-EOF
> + [
> + {
> + "hostnqn": "${def_hostnqn}",
> + "hostid": "${def_hostid}",
> + "subsystems": [
> + {
> + "application": "blktests",
> + "nqn": "blktests-subsystem-1",
> + "ports": [
> + {
> + "transport": "fc",
> + "traddr": "nn-${def_remote_wwnn}:pn-${def_remote_wwpn}",
> + "host_traddr": "nn-${def_local_wwnn}:pn-${def_local_wwpn}"
> + }
> + ]
> + }
> + ]
> + }
> + ]
> + EOF
> +}
> +
> +_cleanup_nvme_cli() {
> + if ! _nvme_cli_supports_context; then
> + return
> + fi
> +
> + rm -f /run/nvme/blktests.json
> +}
> +
> _nvme_fcloop_add_rport() {
> local local_wwnn="$1"
> local local_wwpn="$2"
> @@ -235,6 +279,8 @@ _cleanup_fcloop() {
> _nvme_fcloop_del_lport "${local_wwnn}" "${local_wwpn}"
> _nvme_fcloop_del_rport "${local_wwnn}" "${local_wwpn}" \
> "${remote_wwnn}" "${remote_wwpn}"
> +
> + _cleanup_nvme_cli
> }
>
> _cleanup_nvmet() {
> @@ -337,6 +383,8 @@ _setup_nvmet() {
> def_host_traddr=$(printf "nn-%s:pn-%s" \
> "${def_local_wwnn}" \
> "${def_local_wwpn}")
> +
> + _setup_nvme_cli
> fi
> }
>
> @@ -436,18 +484,18 @@ _nvme_connect_subsys() {
> trtype="$1"
> subsysnqn="$2"
>
> - ARGS=(-t "${trtype}" -n "${subsysnqn}")
> + ARGS=(-t "${trtype}"
> + -n "${subsysnqn}"
> + --hostnqn="${hostnqn}"
> + --hostid="${hostid}")
> + if _nvme_cli_supports_context; then
> + ARGS+=(--context="blktests")
> + fi
> if [[ "${trtype}" == "fc" ]] ; then
> ARGS+=(-a "${traddr}" -w "${host_traddr}")
> elif [[ "${trtype}" != "loop" ]]; then
> ARGS+=(-a "${traddr}" -s "${trsvcid}")
> fi
> - if [[ "${hostnqn}" != "$def_hostnqn" ]]; then
> - ARGS+=(--hostnqn="${hostnqn}")
> - fi
> - if [[ "${hostid}" != "$def_hostid" ]]; then
> - ARGS+=(--hostid="${hostid}")
> - fi
> if [[ -n "${hostkey}" ]]; then
> ARGS+=(--dhchap-secret="${hostkey}")
> fi
> @@ -482,7 +530,12 @@ _nvme_discover() {
> local host_traddr="${3:-$def_host_traddr}"
> local trsvcid="${3:-$def_trsvcid}"
>
> - ARGS=(-t "${trtype}")
> + ARGS=(-t "${trtype}"
> + --hostnqn="${def_hostnqn}"
> + --hostid="${def_hostid}")
> + if _nvme_cli_supports_context; then
> + ARGS+=(--context="blktests")
> + fi
> if [[ "${trtype}" = "fc" ]]; then
> ARGS+=(-a "${traddr}" -w "${host_traddr}")
> elif [[ "${trtype}" != "loop" ]]; then