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tcp: add some mibs to track collapsing 

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ilpo Järvinen 2008-11-24 21:27:22 -08:00 committed by David S. Miller
parent 92ee76b6d9
commit 111cc8b913
3 changed files with 10 additions and 0 deletions
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3
include/linux/snmp.h
View File

@ -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
};

3
net/ipv4/proc.c
View File

@ -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
};

4
net/ipv4/tcp_input.c
View File

@ -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;
}