Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 09e9b813 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

tcp: add LINUX_MIB_TCPRETRANSFAIL counter 



It might be useful to get a counter of failed tcp_retransmit_skb()
calls.

Reported-by: default avatarSatoru Moriya <satoru.moriya@hds.com>
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bb349bb4

include/linux/snmp.h

+1 −0
Original line number Diff line number Diff line
@@ -232,6 +232,7 @@ enum 
	LINUX_MIB_TCPTIMEWAITOVERFLOW,		/* TCPTimeWaitOverflow */

	LINUX_MIB_TCPREQQFULLDOCOOKIES,		/* TCPReqQFullDoCookies */

	LINUX_MIB_TCPREQQFULLDROP,		/* TCPReqQFullDrop */

	LINUX_MIB_TCPRETRANSFAIL,		/* TCPRetransFail */

	__LINUX_MIB_MAX

};

net/ipv4/proc.c

+1 −0
Original line number Diff line number Diff line
@@ -256,6 +256,7 @@ static const struct snmp_mib snmp4_net_list[] = { 
	SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),

	SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),

	SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),

	SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),

	SNMP_MIB_SENTINEL

};

net/ipv4/tcp_output.c

+3 −1
Original line number Diff line number Diff line
@@ -2308,8 +2308,10 @@ void tcp_xmit_retransmit_queue(struct sock *sk) 
		if (sacked & (TCPCB_SACKED_ACKED|TCPCB_SACKED_RETRANS))

			continue;



		if (tcp_retransmit_skb(sk, skb))

		if (tcp_retransmit_skb(sk, skb)) {

			NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPRETRANSFAIL);

			return;

		}

		NET_INC_STATS_BH(sock_net(sk), mib_idx);



		if (inet_csk(sk)->icsk_ca_state == TCP_CA_Recovery)