update config to support more vhd features down the road

config/config.go

@@ -120,14 +120,6 @@ type RemoteQueryConfiguration struct {
 
 // SystemConfiguration defines basic system configuration settings.
 type SystemConfiguration struct {
-	// UseVirtualDisks sets Wings to use virtual hard-disks when storing server
-	// files. This allows for more enforced disk space limits, at a slight performance
-	// cost.
-	//
-	// Generally this only needs to be enabled on systems with a large untrusted
-	// user presence, it is not necessary for self-hosting instances.
-	UseVirtualDisks bool `json:"use_virtual_disks" yaml:"use_virtual_disks"`
-
 	// The root directory where all of the pterodactyl data is stored at.
 	RootDirectory string `default:"/var/lib/pterodactyl" yaml:"root_directory"`
 
@@ -313,6 +305,11 @@ type Configuration struct {
 	// is only required by users running Wings without SSL certificates and using internal IP
 	// addresses in order to connect. Most users should NOT enable this setting.
 	AllowCORSPrivateNetwork bool `json:"allow_cors_private_network" yaml:"allow_cors_private_network"`
+
+	// Servers contains all of the settings that are used when configuring individual servers
+	// on the system. This is a global configuration for all server instances, not to be confused
+	// with the per-server configurations provided by the Panel API.
+	Servers Servers `json:"servers" yaml:"servers"`
 }
 
 // NewAtPath creates a new struct and set the path where it should be stored.

config/config_servers.go

@@ -0,0 +1,28 @@
+package config
+
+type FSDriver string
+
+const (
+	FSDriverLocal FSDriver = "local"
+	FSDriverVHD   FSDriver = "vhd"
+)
+
+type Servers struct {
+	// Filesystem defines all of the filesystem specific settings used for servers.
+	Filesystem Filesystem `json:"filesystem" yaml:"filesystem"`
+}
+
+type Filesystem struct {
+	// Driver defines the underlying filesystem driver that is used when a server is
+	// created on the system. This currently supports either of the following drivers:
+	//
+	// local: the local driver is the default one used by Wings. This offloads all of the
+	//        disk limit enforcement to Wings itself. This has a performance impact but is
+	//        the most compatiable with all systems.
+	//   vhd: the vhd driver uses "virtual" disks on the host system to enforce disk limits
+	//        on the server. This is more performant since calculations do not need to be made
+	//        by Wings itself when enforcing limits. It also avoids vulnerabilities that exist
+	//        in the local driver which allow malicious processes to quickly create massive files
+	//        before Wings is able to detect and stop them from being written.
+	Driver FSDriver `default:"local" json:"driver" yaml:"driver"`
+}