tree 57cdc7f8d2c55996b0ca1b6e74a8de8fa997b29f
parent 4fb126cbcbd6870851f0b3ba503e8ec0e66b9dd5
author Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> 1530845340 +0900
committer Alexei Starovoitov <ast@kernel.org> 1531002335 -0700

xdp: XDP_REDIRECT should check IFF_UP and MTU

Otherwise we end up with attempting to send packets from down devices
or to send oversized packets, which may cause unexpected driver/device
behaviour. Generic XDP has already done this check, so reuse the logic
in native XDP.

Fixes: 814abfabef3c ("xdp: add bpf_redirect helper function")
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>