selftests/bpf: Add bpf_program__attach_netfilter helper test

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Call bpf_program__attach_netfilter() with different
protocol/hook/priority combinations.

Test fails if supposedly-illegal attachments work
(e.g., bogus protocol family, illegal priority and so on) or if a
should-work attachment fails.  Expected output:

 ./test_progs -t netfilter_link_attach
 #145/1   netfilter_link_attach/allzero:OK
 #145/2   netfilter_link_attach/invalid-pf:OK
 #145/3   netfilter_link_attach/invalid-hooknum:OK
 #145/4   netfilter_link_attach/invalid-priority-min:OK
 #145/5   netfilter_link_attach/invalid-priority-max:OK
 #145/6   netfilter_link_attach/invalid-flags:OK
 #145/7   netfilter_link_attach/invalid-inet-not-supported:OK
 #145/8   netfilter_link_attach/attach ipv4:OK
 #145/9   netfilter_link_attach/attach ipv6:OK

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Acked-by: Daniel Xu <dxu@dxuuu.xyz>
Link: https://lore.kernel.org/bpf/20230628152738.22765-3-fw@strlen.de

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This commit is contained in:

Florian Westphal 2023-06-28 17:27:38 +02:00 • committed by Andrii Nakryiko

parent 52364abb10

commit a94098d490

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86

tools/testing/selftests/bpf/prog_tests/netfilter_link_attach.c

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14

tools/testing/selftests/bpf/progs/test_netfilter_link_attach.c

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