+#define UDEVD_PRIORITY -4
+#define UDEV_PRIORITY -2
+
+/* duration of initialization phase with shorter timeout */
+#define UDEVD_INIT_TIME 5
+#define UDEVD_INIT_EVENT_TIMEOUT 2
+
+/* timeout to wait for missing events */
+#define UDEVD_EVENT_TIMEOUT 5
+
+/* maximum limit of runnig childs */
+#define UDEVD_MAX_CHILDS 64
+/* start to throttle forking if maximum number of running childs in our session is reached */
+#define UDEVD_MAX_CHILDS_RUNNING 8
+
+/* environment buffer, should match the kernel's size in lib/kobject_uevent.h */
+#define UEVENT_BUFFER_SIZE 1024
+#define UEVENT_NUM_ENVP 32
+
+enum udevd_msg_type {
+ UDEVD_UNKNOWN,
+ UDEVD_UEVENT,
+ UDEVD_STOP_EXEC_QUEUE,
+ UDEVD_START_EXEC_QUEUE,
+};
+
+
+struct udevd_msg {
+ char magic[32];
+ enum udevd_msg_type type;
+ char envbuf[UEVENT_BUFFER_SIZE+512];
+};
+
+struct uevent_msg {
+ struct list_head node;