diff options
author | Jesper Dangaard Brouer <brouer@redhat.com> | 2017-08-29 16:38:06 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-08-29 10:51:29 -0700 |
commit | 306da4e685b415f5c875cef275001b5cdc182da9 (patch) | |
tree | 76ba2be2cdb8d5a01fa43270a66fdbf758837f99 /net/kcm | |
parent | xdp: separate xdp_redirect tracepoint in map case (diff) | |
download | linux-dev-306da4e685b415f5c875cef275001b5cdc182da9.tar.xz linux-dev-306da4e685b415f5c875cef275001b5cdc182da9.zip |
samples/bpf: xdp_redirect load XDP dummy prog on TX device
For supporting XDP_REDIRECT, a device driver must (obviously)
implement the "TX" function ndo_xdp_xmit(). An additional requirement
is you cannot TX out a device, unless it also have a xdp bpf program
attached. This dependency is caused by the driver code need to setup
XDP resources before it can ndo_xdp_xmit.
Update bpf samples xdp_redirect and xdp_redirect_map to automatically
attach a dummy XDP program to the configured ifindex_out device. Use
the XDP flag XDP_FLAGS_UPDATE_IF_NOEXIST on the dummy load, to avoid
overriding an existing XDP prog on the device.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/kcm')
0 files changed, 0 insertions, 0 deletions