tcp: add some mibs to track collapsing

[mv-sheeva.git] / net / ipv4 / tcp_input.c

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index e6291dde33486021039c1eff3fe9764da81feed8..9f8a80ba17bd3ba9f55d84d5b9491e9e34cf4446 100644 (file)
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -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;
 }