Re: [PATCH net-next v3 5/5] bpf: update XDP selftests to not fail with generic XDP

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Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx> writes:

> Generic XDP devmaps and cpumaps now allow setting value_size to 8 bytes
> (so that prog_fd can be specified) and XDP progs using them succeed in
> SKB mode now. Adjust the checks.
>
> Signed-off-by: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>
> ---
>  tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c | 4 ++--
>  tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c | 4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c b/tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c
> index 0176573fe4e7..42e46d2ae349 100644
> --- a/tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c
> +++ b/tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c
> @@ -29,8 +29,8 @@ void test_xdp_with_cpumap_helpers(void)
>  	 */
>  	prog_fd = bpf_program__fd(skel->progs.xdp_redir_prog);
>  	err = bpf_set_link_xdp_fd(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE);
> -	CHECK(err == 0, "Generic attach of program with 8-byte CPUMAP",
> -	      "should have failed\n");
> +	CHECK(err, "Generic attach of program with 8-byte CPUMAP",
> +	      "shouldn't have failed\n");

There's a comment right above this that is now wrong... Also, this
program is never being detached.

>  	prog_fd = bpf_program__fd(skel->progs.xdp_dummy_cm);
>  	map_fd = bpf_map__fd(skel->maps.cpu_map);
> diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c b/tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c
> index 88ef3ec8ac4c..861db508ace2 100644
> --- a/tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c
> +++ b/tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c
> @@ -31,8 +31,8 @@ void test_xdp_with_devmap_helpers(void)
>  	 */
>  	dm_fd = bpf_program__fd(skel->progs.xdp_redir_prog);
>  	err = bpf_set_link_xdp_fd(IFINDEX_LO, dm_fd, XDP_FLAGS_SKB_MODE);
> -	CHECK(err == 0, "Generic attach of program with 8-byte devmap",
> -	      "should have failed\n");
> +	CHECK(err, "Generic attach of program with 8-byte devmap",
> +	      "shouldn't have failed\n");

... same here


-Toke




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