[blktests v3 1/2] nvme: Add _setup_nvmet_port_marginal

[Jesse Taube]

Adds functionality to set up a NVME port in marginal state.
This is useful for testing the behavior of the NVME driver when a port
is in a marginal state.

Signed-off-by: Jesse Taube <jtaubepe at redhat.com>
Reviewed-by: John Meneghini <jmeneghi at redhat.com>
Tested-by: John Meneghini <jmeneghi at redhat.com>
---
V1 -> V2:
 - Added john's review and test-by tags
 - Use != instead of ! ==
 - Wrap lines over 80col
V2 -> V3:
 - No change
---
 common/nvme | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/common/nvme b/common/nvme
index f399937..a6d6b28 100644
--- a/common/nvme
+++ b/common/nvme
@@ -153,6 +153,16 @@ _nvme_fcloop_add_tport() {
 	echo "wwnn=${wwnn},wwpn=${wwpn}" > ${loopctl}/add_target_port
 }
 
+_nvme_fcloop_set_rport_marginal() {
+	local wwnn="$1"
+	local wwpn="$2"
+	local marginal="$3"
+	local loopctl=/sys/class/fcloop/ctl
+
+	echo "wwnn=${wwnn},wwpn=${wwpn},marginal=${marginal}" \
+	     > ${loopctl}/set_marginal_rport
+}
+
 _nvme_fcloop_del_rport() {
 	local local_wwnn="$1"
 	local local_wwpn="$2"
@@ -763,6 +773,27 @@ _create_nvmet_port() {
 	echo "${port}"
 }
 
+_setup_nvmet_port_marginal() {
+	local -i port="$1"
+	local state="${2}"
+
+	if [[ "${nvme_trtype}" != "fc" ]]; then
+		echo "FAIL _setup_nvmet_port_marginal() only supports fc transport"
+		exit 1
+	fi
+
+	if [[ "${state}" == "live" ]]; then
+		_nvme_fcloop_set_rport_marginal "$(_remote_wwnn $port)" \
+					"$(_remote_wwpn $port)" 0
+	elif [[ "${state}" == "marginal" ]]; then
+		_nvme_fcloop_set_rport_marginal "$(_remote_wwnn $port)" \
+					"$(_remote_wwpn $port)" 1
+	else
+		echo "FAIL _setup_nvmet_port_marginal() invalid state: ${state}"
+		exit 1
+	fi
+}
+
 _setup_nvmet_port_ana() {
 	local port="$1"
 	local anagrpid="${2:-$def_anagrpid}"
-- 
2.54.0