• Neil Horman's avatar
    dropmon: add ability to detect when hardware dropsrxpackets · 4ea7e386
    Neil Horman authored
    Patch to add the ability to detect drops in hardware interfaces via dropwatch.
    Adds a tracepoint to net_rx_action to signal everytime a napi instance is
    polled.  The dropmon code then periodically checks to see if the rx_frames
    counter has changed, and if so, adds a drop notification to the netlink
    protocol, using the reserved all-0's vector to indicate the drop location was in
    hardware, rather than somewhere in the code.
    Signed-off-by: default avatarNeil Horman <nhorman@tuxdriver.com>
    
     include/linux/net_dropmon.h |    8 ++
     include/trace/napi.h        |   11 +++
     net/core/dev.c              |    5 +
     net/core/drop_monitor.c     |  124 ++++++++++++++++++++++++++++++++++++++++++--
     net/core/net-traces.c       |    4 +
     net/core/netpoll.c          |    2
     6 files changed, 149 insertions(+), 5 deletions(-)
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    4ea7e386
netpoll.c 19.4 KB