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Date: Sun, 25 Oct 2020 16:12:34 -0600 From: David Ahern <dsahern@...il.com> To: Toke Høiland-Jørgensen <toke@...hat.com>, Hangbin Liu <haliu@...hat.com>, Stephen Hemminger <stephen@...workplumber.org>, Daniel Borkmann <daniel@...earbox.net>, Alexei Starovoitov <ast@...nel.org> Cc: Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>, David Miller <davem@...emloft.net>, Jesper Dangaard Brouer <brouer@...hat.com>, netdev@...r.kernel.org, bpf@...r.kernel.org, Jiri Benc <jbenc@...hat.com>, Andrii Nakryiko <andrii@...nel.org> Subject: Re: [PATCH iproute2-next 3/5] lib: add libbpf support On 10/25/20 9:13 AM, Toke Høiland-Jørgensen wrote: > David Ahern <dsahern@...il.com> writes: > >> On 10/22/20 9:38 PM, Hangbin Liu wrote: >>> Note: ip/ipvrf.c is not convert to use libbpf as it only encodes a few >>> instructions and load directly. >> >> for completeness, libbpf should be able to load a program from a buffer >> as well. > > It can, but the particular use in ipvrf is just loading half a dozen > instructions defined inline in C - there's no object files, BTF or > anything. So why bother with going through libbpf in this case? The > actual attachment is using the existing code anyway... > actually, it already does: bpf_load_program I recalled figuring out how to do it, just did not remember if it was local changes to libbpf. Does not look like any changes were needed: https://github.com/dsahern/bpf-progs/blob/master/src/cgroup_sock.c
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