Commit 056ede6c authored by Stephen Hemminger's avatar Stephen Hemminger Committed by David S. Miller
Browse files

[TCP]: Report congestion control algorithm in tcp_diag. 



Enhancement to the tcp_diag interface used by the iproute2 ss command
to report the tcp congestion control being used by a socket.

Signed-off-by: default avatarStephen Hemminger <shemminger@osdl.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7c99c909

include/linux/tcp_diag.h

+2 −2
Original line number Diff line number Diff line
@@ -99,9 +99,10 @@ enum 
	TCPDIAG_MEMINFO,

	TCPDIAG_INFO,

	TCPDIAG_VEGASINFO,

	TCPDIAG_CONG,

};



#define TCPDIAG_MAX TCPDIAG_VEGASINFO

#define TCPDIAG_MAX TCPDIAG_CONG





/* TCPDIAG_MEM */
@@ -123,5 +124,4 @@ struct tcpvegas_info { 
	__u32	tcpv_minrtt;

};





#endif /* _TCP_DIAG_H_ */

net/ipv4/tcp_diag.c

+5 −0
Original line number Diff line number Diff line
@@ -65,6 +65,11 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk, 
		if (ext & (1<<(TCPDIAG_INFO-1)))

			info = TCPDIAG_PUT(skb, TCPDIAG_INFO, sizeof(*info));

		

		if (ext & (1<<(TCPDIAG_CONG-1))) {

			size_t len = strlen(tp->ca_ops->name);

			strcpy(TCPDIAG_PUT(skb, TCPDIAG_CONG, len+1),

			       tp->ca_ops->name);

		}

	}

	r->tcpdiag_family = sk->sk_family;

	r->tcpdiag_state = sk->sk_state;

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