rework log handling

- make logging events more structured
- add fine grained control over log events
- make it possible to receive more detailed events via ubus

Signed-off-by: Felix Fietkau <nbd@nbd.name>

event.h

@@ -0,0 +1,59 @@
+#ifndef __USTEER_EVENT_H
+#define __USTEER_EVENT_H
+
+enum uevent_type {
+	UEV_PROBE_REQ_ACCEPT,
+	UEV_PROBE_REQ_DENY,
+	UEV_AUTH_REQ_ACCEPT,
+	UEV_AUTH_REQ_DENY,
+	UEV_ASSOC_REQ_ACCEPT,
+	UEV_ASSOC_REQ_DENY,
+	UEV_LOAD_KICK_TRIGGER,
+	UEV_LOAD_KICK_RESET,
+	UEV_LOAD_KICK_MIN_CLIENTS,
+	UEV_LOAD_KICK_NO_CLIENT,
+	UEV_LOAD_KICK_CLIENT,
+	UEV_SIGNAL_KICK,
+};
+
+enum uevent_reason {
+	UEV_REASON_NONE,
+	UEV_REASON_RETRY_EXCEEDED,
+	UEV_REASON_LOW_SIGNAL,
+	UEV_REASON_CONNECT_DELAY,
+	UEV_REASON_BETTER_CANDIDATE,
+};
+
+enum uevent_select_reason {
+	UEV_SELECT_REASON_NUM_ASSOC,
+	UEV_SELECT_REASON_SIGNAL,
+	UEV_SELECT_REASON_LOAD,
+};
+
+struct uevent {
+	enum uevent_type type;
+	enum uevent_reason reason;
+	uint32_t select_reasons;
+
+	struct usteer_node *node_local;
+	struct sta *sta;
+
+	struct sta_info *si_cur;
+	struct sta_info *si_other;
+
+	struct usteer_node *node_cur;
+	struct usteer_node *node_other;
+
+	unsigned int count;
+
+	struct {
+		int cur;
+		int ref;
+	} threshold;
+};
+
+void usteer_event(struct uevent *ev);
+void config_set_event_log_types(struct blob_attr *attr);
+void config_get_event_log_types(struct blob_buf *buf);
+
+#endif