On Tue, Aug 31, 2021 at 10:56 PM John Fastabend
[off-list ref] wrote:

Neil Spring wrote:

quoted

bpf_prog_test_run_xattr takes a struct __sk_buff, but did not permit
that __skbuff to include an nonzero ingress_ifindex.

This patch updates to allow ingress_ifindex, convert the __sk_buff field to
sk_buff (skb_iif) and back, and test that the value is present from
tested bpf.  The test sets an unlikely distinct value for ingress_ifindex
(11) from ifindex (1), but that seems in keeping with the rest of the
synthetic fields.

Adding this support allows testing BPF that operates differently on
incoming and outgoing skbs by discriminating on this field.

Signed-off-by: Neil Spring <redacted>
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Acked-by: John Fastabend <john.fastabend@gmail.com>

Applied to bpf-next, thanks.