* each device manager node has now an autogenerated identifier

* added a generic syscall for device_manager
it enables to iterate the device manager tree from userland
* the listdev tool is now using it: it's still incomplete as it only dumps nodes and attributes


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19260 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/kdevice_manager.h

@@ -38,6 +38,7 @@ struct device_node_info {
 	uint32				num_io_resources;	// number of I/O resources
 	io_resource_handle	*io_resources;		// array of I/O resource (NULL-terminated)
 	bool				automatically_loaded;	// loaded automatically because PNP_DRIVER_ALWAYS_LOADED
+	uint32				internal_id;	// internal identifier
 };
 
 
@@ -50,6 +51,32 @@ extern "C" {
 extern status_t probe_for_device_type(const char *type);
 extern status_t device_manager_init(struct kernel_args *args);
 
+// temporary/optional device manager syscall API
+#define DEVICE_MANAGER_SYSCALLS "device_manager"
+
+#define DM_GET_ROOT			1
+#define DM_GET_CHILD			2
+#define DM_GET_NEXT_CHILD		3
+#define DM_GET_NEXT_ATTRIBUTE		4
+
+struct dev_attr {
+	uint32 		node_cookie;
+	uint32		cookie;
+	char		name[255];
+	type_code	type;
+	union {
+		uint8   ui8;
+		uint16  ui16;
+		uint32  ui32;
+		uint64  ui64;
+		char    string[255];
+		struct {
+			void    *data;
+			size_t  length;
+		} raw;
+	} value;
+};
+
 #ifdef __cplusplus
 }
 #endif