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authorWei Wang <weiwan@google.com>2018-07-31 17:46:23 -0700
committerDavid S. Miller <davem@davemloft.net>2018-08-01 09:56:10 -0700
commit7e10b6554ff2ce7f86d5d3eec3af5db8db482caa (patch)
treec0c8a9dff5449d56f2ff9adf24ab0618e06957aa /include/uapi/linux/tcp.h
parentfb31c9b9f6c85b1bad569ecedbde78d9e37cd87b (diff)
tcp: add dsack blocks received stats
Introduce a new TCP stat to record the number of DSACK blocks received (RFC4989 tcpEStatsStackDSACKDups) and expose it in both tcp_info (TCP_INFO) and opt_stats (SOF_TIMESTAMPING_OPT_STATS). Signed-off-by: Wei Wang <weiwan@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/linux/tcp.h')
-rw-r--r--include/uapi/linux/tcp.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h
index c31f5100b744..0e1c0aec0153 100644
--- a/include/uapi/linux/tcp.h
+++ b/include/uapi/linux/tcp.h
@@ -238,6 +238,7 @@ struct tcp_info {
__u64 tcpi_bytes_sent; /* RFC4898 tcpEStatsPerfHCDataOctetsOut */
__u64 tcpi_bytes_retrans; /* RFC4898 tcpEStatsPerfOctetsRetrans */
+ __u32 tcpi_dsack_dups; /* RFC4898 tcpEStatsStackDSACKDups */
};
/* netlink attributes types for SCM_TIMESTAMPING_OPT_STATS */
@@ -262,6 +263,7 @@ enum {
TCP_NLA_DELIVERED_CE, /* Like above but only ones w/ CE marks */
TCP_NLA_BYTES_SENT, /* Data bytes sent including retransmission */
TCP_NLA_BYTES_RETRANS, /* Data bytes retransmitted */
+ TCP_NLA_DSACK_DUPS, /* DSACK blocks received */
};
/* for TCP_MD5SIG socket option */