• E
    tcp: add tcpi_bytes_acked to tcp_info · 0df48c26
    Eric Dumazet 提交于
    This patch tracks total number of bytes acked for a TCP socket.
    This is the sum of all changes done to tp->snd_una, and allows
    for precise tracking of delivered data.
    
    RFC4898 named this : tcpEStatsAppHCThruOctetsAcked
    
    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_acked was placed near tp->snd_una for
    best data locality and minimal performance impact.
    Signed-off-by: NEric Dumazet <edumazet@google.com>
    Acked-by: NYuchung 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>
    Signed-off-by: NDavid S. Miller <davem@davemloft.net>
    0df48c26
tcp.h 12.1 KB