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authorEric Dumazet <edumazet@google.com>2015-04-28 15:28:18 -0700
committerDavid S. Miller <davem@davemloft.net>2015-04-29 17:10:37 -0400
commitbdd1f9edacb5f5835d1e6276571bbbe5b88ded48 (patch)
treebee07eb61b32918398a04cc171327b45cf14408d /net/ipv4/tcp.c
parent0df48c26d8418c5c9fba63fac15b660d70ca2f1c (diff)
tcp: add tcpi_bytes_received to tcp_info
This patch tracks total number of payload bytes received on a TCP socket. This is the sum of all changes done to tp->rcv_nxt RFC4898 named this : tcpEStatsAppHCThruOctetsReceived This is a 64bit field, and can be fetched both from TCP_INFO getsockopt() if one has a handle on a TCP socket, or from inet_diag netlink facility (iproute2/ss patch will follow) Note that tp->bytes_received was placed near tp->rcv_nxt for best data locality and minimal performance impact. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Matt Mathis <mattmathis@google.com> Cc: Eric Salo <salo@google.com> Cc: Martin Lau <kafai@fb.com> Cc: Chris Rapier <rapier@psc.edu> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 4bf0e8ca7b5b..99fcc0b22c92 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2666,6 +2666,7 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
spin_lock_bh(&sk->sk_lock.slock);
info->tcpi_bytes_acked = tp->bytes_acked;
+ info->tcpi_bytes_received = tp->bytes_received;
spin_unlock_bh(&sk->sk_lock.slock);
}
EXPORT_SYMBOL_GPL(tcp_get_info);