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libbpf: Add bpf_get_link_xdp_info() function to get more XDP information

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Currently, libbpf only provides a function to get a single ID for the XDP
program attached to the interface. However, it can be useful to get the
full set of program IDs attached, along with the attachment mode, in one
go. Add a new getter function to support this, using an extendible
structure to carry the information. Express the old bpf_get_link_id()
function in terms of the new function.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/157333185164.88376.7520653040667637246.stgit@toke.dk
This commit is contained in:
Toke Høiland-Jørgensen
2019-11-09 21:37:31 +01:00
committed by Andrii Nakryiko
parent c8c02fca3a
commit 26954e103d
3 changed files with 67 additions and 28 deletions
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src/libbpf.map
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@@ -193,6 +193,7 @@ LIBBPF_0.0.5 {
LIBBPF_0.0.6 {
global:
bpf_get_link_xdp_info;
bpf_map__get_pin_path;
bpf_map__is_pinned;
bpf_map__set_pin_path;