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(parent: 5a5e581) | 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)
commita7d9fcad986cebca924290a590bcd63e9b266e26
tree1fc015113abd682af506b436bb3788d1cc28a760tree | snapshot
parent5a5e5814fef6edc693aa40b666e8754d2621cd07commit | 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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