bpf: enable direct packet data write for xdp progs

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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>

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Brenden Blanco 2016-07-19 12:16:56 -07:00 • committed by David S. Miller

parent 9ecc2d8617

commit 4acf6c0b84

1 changed files with 16 additions and 1 deletions

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kernel/bpf/verifier.c

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