diff --git a/include/unix_diag.h b/include/unix_diag.h
index 09274d6f4..7d8979bcd 100644
--- a/include/unix_diag.h
+++ b/include/unix_diag.h
@@ -18,6 +18,7 @@ struct unix_diag_req {
 #define UDIAG_SHOW_PEER		0x00000004	/* show peer socket info */
 #define UDIAG_SHOW_ICONS	0x00000008	/* show pending connections */
 #define UDIAG_SHOW_RQLEN	0x00000010	/* show skb receive queue len */
+#define UDIAG_SHOW_MEMINFO	0x00000020	/* show memory info of a socket */
 
 struct unix_diag_msg {
 	u8	udiag_family;
@@ -29,12 +30,25 @@ struct unix_diag_msg {
 	u32	udiag_cookie[2];
 };
 
+enum {
+	SK_MEMINFO_RMEM_ALLOC,
+	SK_MEMINFO_RCVBUF,
+	SK_MEMINFO_WMEM_ALLOC,
+	SK_MEMINFO_SNDBUF,
+	SK_MEMINFO_FWD_ALLOC,
+	SK_MEMINFO_WMEM_QUEUED,
+	SK_MEMINFO_OPTMEM,
+
+	SK_MEMINFO_VARS,
+};
+
 enum {
 	UNIX_DIAG_NAME,
 	UNIX_DIAG_VFS,
 	UNIX_DIAG_PEER,
 	UNIX_DIAG_ICONS,
 	UNIX_DIAG_RQLEN,
+	UNIX_DIAG_MEMINFO,
 
 	UNIX_DIAG_MAX,
 };
@@ -44,4 +58,9 @@ struct unix_diag_vfs {
 	u32	udiag_vfs_dev;
 };
 
+struct unix_diag_rqlen {
+	u32	udiag_rqueue;
+	u32	udiag_wqueue;
+};
+
 #endif /* UNIX_DIAG_H__ */