[DCCP]: Give more info on Step 6 failure debug printk

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/dccp/input.c b/net/dccp/input.c
index 3c4cbff82e95c90ceff7f4993fc4c3ef3444799e..ce8396b126d242c70f6b7a72e311ec10432844a0 100644 (file)
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -136,8 +136,15 @@ static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
                     DCCP_PKT_WITHOUT_ACK_SEQ))
                        dp->dccps_gar = DCCP_SKB_CB(skb)->dccpd_ack_seq;
        } else {
-               LIMIT_NETDEBUG(KERN_WARNING "DCCP: Step 6 failed, "
-                                           "sending SYNC...\n");
+               LIMIT_NETDEBUG(KERN_WARNING "DCCP: Step 6 failed for %s packet, "
+                                           "(LSWL(%llu) <= P.seqno(%llu) <= S.SWH(%llu)) and "
+                                           "(P.ackno %s or LAWL(%llu) <= P.ackno(%llu) <= S.AWH(%llu), "
+                                           "sending SYNC...\n",
+                              dccp_packet_name(dh->dccph_type),
+                              lswl, DCCP_SKB_CB(skb)->dccpd_seq, dp->dccps_swh,
+                              (DCCP_SKB_CB(skb)->dccpd_ack_seq ==
+                               DCCP_PKT_WITHOUT_ACK_SEQ) ? "doesn't exist" : "exists",
+                              lawl, DCCP_SKB_CB(skb)->dccpd_ack_seq, dp->dccps_awh);
                dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq, DCCP_PKT_SYNC);
                return -1;
        }