xdp: Add xdp_txq_info to xdp_buff

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Add xdp_txq_info as the Tx counterpart to xdp_rxq_info. At the
moment only the device is added. Other fields (queue_index)
can be added as use cases arise.

>From a UAPI perspective, add egress_ifindex to xdp context for
bpf programs to see the Tx device.

Update the verifier to only allow accesses to egress_ifindex by
XDP programs with BPF_XDP_DEVMAP expected attach type.

Signed-off-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/20200529220716.75383-4-dsahern@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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David Ahern 2020-05-29 16:07:14 -06:00 • committed by Alexei Starovoitov

parent fbee97feed

commit 64b59025c1

5 changed files with 29 additions and 0 deletions

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5

include/net/xdp.h

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2

include/uapi/linux/bpf.h

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