lxd/storage.go
func getStoragePoolVolumeMountPoint(poolName string, volumeName string) string {
	return shared.VarPath("storage-pools", poolName, "custom", volumeName)
}
func getStoragePoolVolumeMountPoint(poolName string, volumeName string) string {
	return shared.VarPath("storage-pools", poolName, "custom", volumeName)
}
// ${LXD_DIR}/storage-pools/<pool>/custom/<storage_volume>