xdp: remove net_device names from xdp_redirect tracepoint
authorJesper Dangaard Brouer <brouer@redhat.com>
Thu, 24 Aug 2017 10:33:18 +0000 (12:33 +0200)
committerDavid S. Miller <davem@davemloft.net>
Thu, 24 Aug 2017 18:59:37 +0000 (11:59 -0700)
commita873585587205750e7accfb2c93c29239ffa6e09
tree3896a9d8cd9c2fb67d06e549e8ff0614beebfbe5
parent2886447dc5add28226451c163cd9ac1d1b3bf59a
xdp: remove net_device names from xdp_redirect tracepoint

There is too much overhead in the current trace_xdp_redirect
tracepoint as it does strcpy and strlen on the net_device names.

Besides, exposing the ifindex/index is actually the information that
is needed in the tracepoint to diagnose issues.  When a lookup fails
(either ifindex or devmap index) then there is a need for saying which
to_index that have issues.

V2: Adjust args to be aligned with trace_xdp_exception.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/trace/events/xdp.h
net/core/filter.c