mctp: Add sockaddr_mctp to uapi

This change introduces the user-visible MCTP header, containing the
protocol-specific addressing definitions.

Signed-off-by: Jeremy Kerr <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/uapi/linux/mctp.h

···
 #ifndef __UAPI_MCTP_H
 #define __UAPI_MCTP_H
 
-struct sockaddr_mctp {
+#include <linux/types.h>
+
+typedef __u8			mctp_eid_t;
+
+struct mctp_addr {
+	mctp_eid_t		s_addr;
 };
+
+struct sockaddr_mctp {
+	unsigned short int	smctp_family;
+	int			smctp_network;
+	struct mctp_addr	smctp_addr;
+	__u8			smctp_type;
+	__u8			smctp_tag;
+};
+
+#define MCTP_NET_ANY		0x0
+
+#define MCTP_ADDR_NULL		0x00
+#define MCTP_ADDR_ANY		0xff
+
+#define MCTP_TAG_MASK		0x07
+#define MCTP_TAG_OWNER		0x08
 
 #endif /* __UAPI_MCTP_H */