• Daniel Borkmann's avatar
    packet: account statistics only in tpacket_stats_u · ee80fbf3
    Daniel Borkmann authored
    Currently, packet_sock has a struct tpacket_stats stats member for
    TPACKET_V1 and TPACKET_V2 statistic accounting, and with TPACKET_V3
    ``union tpacket_stats_u stats_u'' was introduced, where however only
    statistics for TPACKET_V3 are held, and when copied to user space,
    TPACKET_V3 does some hackery and access also tpacket_stats' stats,
    although everything could have been done within the union itself.
    Unify accounting within the tpacket_stats_u union so that we can
    remove 8 bytes from packet_sock that are there unnecessary. Note that
    even if we switch to TPACKET_V3 and would use non mmap(2)ed option,
    this still works due to the union with same types + offsets, that are
    exposed to the user space.
    Signed-off-by: default avatarDaniel Borkmann <dborkman@redhat.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
internal.h 2.67 KB