diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 8c43138..22f40c9 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -210,8 +210,13 @@ struct tcp_sock {
 		u64 mstamp; /* (Re)sent time of the skb */
 		u32 rtt_us;  /* Associated RTT */
 		u32 end_seq; /* Ending TCP sequence of the skb */
-		u8 advanced; /* mstamp advanced since last lost marking */
-		u8 reord;    /* reordering detected */
+		u32 last_delivered; /* tp->delivered at last reo_wnd adj */
+		u8 reo_wnd_steps;   /* Allowed reordering window */
+#define TCP_RACK_RECOVERY_THRESH 16
+		u8 reo_wnd_persist:5, /* No. of recovery since last adj */
+		   dsack_seen:1, /* Whether DSACK seen after last adj */
+		   advanced:1,	 /* mstamp advanced since last lost marking */
+		   reord:1;	 /* reordering detected */
 	} rack;
 	u16	advmss;		/* Advertised MSS			*/
 	u32	chrono_start;	/* Start time in jiffies of a TCP chrono */