From a7ec381049c0d1f03e342063d75f5c3b314d0ec2 Mon Sep 17 00:00:00 2001 From: Menglong Dong Date: Sun, 20 Feb 2022 15:06:36 +0800 Subject: net: tcp: use tcp_drop_reason() for tcp_data_queue() Replace tcp_drop() used in tcp_data_queue() with tcp_drop_reason(). Following drop reasons are introduced: SKB_DROP_REASON_TCP_ZEROWINDOW SKB_DROP_REASON_TCP_OLD_DATA SKB_DROP_REASON_TCP_OVERWINDOW SKB_DROP_REASON_TCP_OLD_DATA is used for the case that end_seq of skb less than the left edges of receive window. (Maybe there is a better name?) Reviewed-by: Mengen Sun Reviewed-by: Hao Peng Signed-off-by: Menglong Dong Reviewed-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller --- include/linux/skbuff.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 671db9f49efe..554ef2c848ee 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -363,6 +363,19 @@ enum skb_drop_reason { * LINUX_MIB_TCPBACKLOGDROP) */ SKB_DROP_REASON_TCP_FLAGS, /* TCP flags invalid */ + SKB_DROP_REASON_TCP_ZEROWINDOW, /* TCP receive window size is zero, + * see LINUX_MIB_TCPZEROWINDOWDROP + */ + SKB_DROP_REASON_TCP_OLD_DATA, /* the TCP data reveived is already + * received before (spurious retrans + * may happened), see + * LINUX_MIB_DELAYEDACKLOST + */ + SKB_DROP_REASON_TCP_OVERWINDOW, /* the TCP data is out of window, + * the seq of the first byte exceed + * the right edges of receive + * window + */ SKB_DROP_REASON_MAX, }; -- cgit v1.2.3