[SCTP]: Implement SCTP_MAX_BURST socket option.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/sctp/constants.h

@@ -283,7 +283,7 @@ enum { SCTP_MAX_GABS = 16 };
 #define SCTP_RTO_BETA           2   /* 1/4 when converted to right shifts. */
 
 /* Maximum number of new data packets that can be sent in a burst.  */
-#define SCTP_MAX_BURST		4
+#define SCTP_DEFAULT_MAX_BURST		4
 
 #define SCTP_CLOCK_GRANULARITY	1	/* 1 jiffy */
 

include/net/sctp/structs.h

@@ -276,6 +276,7 @@ struct sctp_sock {
 	__u32 default_context;
 	__u32 default_timetolive;
 	__u32 default_rcv_context;
+	int max_burst;
 
 	/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
 	 * the destination address every heartbeat interval. This value

include/net/sctp/user.h

@@ -101,6 +101,8 @@ enum sctp_optname {
 #define SCTP_FRAGMENT_INTERLEAVE SCTP_FRAGMENT_INTERLEAVE
 	SCTP_PARTIAL_DELIVERY_POINT,	/* Set/Get partial delivery point */
 #define SCTP_PARTIAL_DELIVERY_POINT SCTP_PARTIAL_DELIVERY_POINT
+	SCTP_MAX_BURST,		/* Set/Get max burst */
+#define SCTP_MAX_BURST SCTP_MAX_BURST
 
 	/* Internal Socket Options. Some of the sctp library functions are 
 	 * implemented using these socket options.