nvme/rc: Add helper for adding/removing to allow list

Add two helpers to add or remove the host from the allow list of the
subsystem.

Signed-off-by: Daniel Wagner <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Shin'ichiro Kawasaki <[email protected]>

Author: dwsuse

tests/nvme/rc

@@ -612,17 +612,32 @@ _create_nvmet_subsystem() {
 	_create_nvmet_ns "${nvmet_subsystem}" "1" "${blkdev}" "${uuid}"
 }
 
+_add_nvmet_allow_hosts() {
+	local nvmet_subsystem="$1"
+	local nvmet_hostnqn="$2"
+	local cfs_path="${NVMET_CFS}/subsystems/${nvmet_subsystem}"
+	local host_path="${NVMET_CFS}/hosts/${nvmet_hostnqn}"
+
+	ln -s "${host_path}" "${cfs_path}/allowed_hosts/${nvmet_hostnqn}"
+}
+
+_remove_nvmet_allow_hosts() {
+	local nvmet_subsystem="$1"
+	local nvmet_hostnqn="$2"
+	local cfs_path="${NVMET_CFS}/subsystems/${nvmet_subsystem}"
+
+	rm "${cfs_path}/allowed_hosts/${nvmet_hostnqn}"
+}
+
 _create_nvmet_host() {
 	local nvmet_subsystem="$1"
 	local nvmet_hostnqn="$2"
 	local nvmet_hostkey="$3"
 	local nvmet_ctrlkey="$4"
-	local cfs_path="${NVMET_CFS}/subsystems/${nvmet_subsystem}"
 	local host_path="${NVMET_CFS}/hosts/${nvmet_hostnqn}"
 
 	mkdir "${host_path}"
-	echo 0 > "${cfs_path}/attr_allow_any_host"
-	ln -s "${host_path}" "${cfs_path}/allowed_hosts/${nvmet_hostnqn}"
+	_add_nvmet_allow_hosts "${nvmet_subsystem}" "${nvmet_hostnqn}"
 	if [[ "${nvmet_hostkey}" ]] ; then
 		echo "${nvmet_hostkey}" > "${host_path}/dhchap_key"
 	fi