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Commit 111cc8b9 authored by Ilpo Järvinen's avatar Ilpo Järvinen Committed by David S. Miller
Browse files

tcp: add some mibs to track collapsing 



Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 92ee76b6

include/linux/snmp.h

+3 −0
Original line number Diff line number Diff line
@@ -216,6 +216,9 @@ enum 
	LINUX_MIB_TCPSPURIOUSRTOS,		/* TCPSpuriousRTOs */

	LINUX_MIB_TCPMD5NOTFOUND,		/* TCPMD5NotFound */

	LINUX_MIB_TCPMD5UNEXPECTED,		/* TCPMD5Unexpected */

	LINUX_MIB_SACKSHIFTED,

	LINUX_MIB_SACKMERGED,

	LINUX_MIB_SACKSHIFTFALLBACK,

	__LINUX_MIB_MAX

};

net/ipv4/proc.c

+3 −0
Original line number Diff line number Diff line
@@ -234,6 +234,9 @@ static const struct snmp_mib snmp4_net_list[] = { 
	SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),

	SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),

	SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),

	SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),

	SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),

	SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),

	SNMP_MIB_SENTINEL

};

net/ipv4/tcp_input.c

+4 −0
Original line number Diff line number Diff line
@@ -1415,6 +1415,7 @@ static int tcp_shifted_skb(struct sock *sk, struct sk_buff *prev, 


	if (skb->len > 0) {

		BUG_ON(!tcp_skb_pcount(skb));

		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SACKSHIFTED);

		return 0;

	}
@@ -1436,6 +1437,8 @@ static int tcp_shifted_skb(struct sock *sk, struct sk_buff *prev, 
	tcp_unlink_write_queue(skb, sk);

	sk_wmem_free_skb(sk, skb);



	NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SACKMERGED);



	return 1;

}
@@ -1594,6 +1597,7 @@ noop: 
	return skb;



fallback:

	NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SACKSHIFTFALLBACK);

	return NULL;

}