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(parent: 5c13f5e) | patch
bpf: enable direct packet data write for xdp progs
authorBrenden Blanco <bblanco@plumgrid.com>
Tue, 19 Jul 2016 19:16:56 +0000 (12:16 -0700)
committerDavid S. Miller <davem@davemloft.net>
Wed, 20 Jul 2016 04:46:33 +0000 (21:46 -0700)
commit034bb148943dd229708bbfb4465f61c558a10b4a
tree1fc015113abd682af506b436bb3788d1cc28a760tree | snapshot
parent5c13f5ea20412726aa4460d95f08a88621e8f065commit | diff
bpf: enable direct packet data write for xdp progs

For forwarding to be effective, XDP programs should be allowed to
rewrite packet data.

This requires that the drivers supporting XDP must all map the packet
memory as TODEVICE or BIDIRECTIONAL before invoking the program.

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
kernel/bpf/verifier.c diff | blob | history
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