On Thu, Jul 30, 2020 at 5:53 AM Jakub Sitnicki <jakub@xxxxxxxxxxxxxx> wrote:
>
> Setting IFA_F_NODAD flag for IPv6 addresses to add to loopback is
> unnecessary. Duplicate Address Detection does not happen on loopback
> device.
>
> Also, passing 'nodad' flag to 'ip address' breaks libbpf CI, which runs in
> an environment with BusyBox implementation of 'ip' command, that doesn't
> understand this flag.
>
> Fixes: 0ab5539f8584 ("selftests/bpf: Tests for BPF_SK_LOOKUP attach point")
> Reported-by: Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx>
> Signed-off-by: Jakub Sitnicki <jakub@xxxxxxxxxxxxxx>
> ---
This fixes the nodad issue, thanks for quick fix!
Tested-by: Andrii Nakryiko <andrii@xxxxxx>
Acked-by: Andrii Nakryiko <andriin@xxxxxx>
But now I see these, which seems like you have a separate fix for, right?
(network_helpers.c:112: errno: Cannot assign requested address) Failed
to connect to server
run_lookup_test:FAIL:connect_fd_to_fd unexpected result err -1 errno 99
#14 cgroup_skb_sk_lookup:FAIL
udp_recv_send:FAIL:recvmsg failed
(/data/users/andriin/linux/tools/testing/selftests/bpf/prog_tests/sk_lookup.c:339:
errno: Resource temporarily unavailable) failed to receive
#73/14 UDP IPv4 redir and reuseport with conns:FAIL
> tools/testing/selftests/bpf/prog_tests/sk_lookup.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/prog_tests/sk_lookup.c b/tools/testing/selftests/bpf/prog_tests/sk_lookup.c
> index 9bbd2b2b7630..379da6f10ee9 100644
> --- a/tools/testing/selftests/bpf/prog_tests/sk_lookup.c
> +++ b/tools/testing/selftests/bpf/prog_tests/sk_lookup.c
> @@ -1290,8 +1290,8 @@ static void run_tests(struct test_sk_lookup *skel)
> static int switch_netns(void)
> {
> static const char * const setup_script[] = {
> - "ip -6 addr add dev lo " EXT_IP6 "/128 nodad",
> - "ip -6 addr add dev lo " INT_IP6 "/128 nodad",
> + "ip -6 addr add dev lo " EXT_IP6 "/128",
> + "ip -6 addr add dev lo " INT_IP6 "/128",
> "ip link set dev lo up",
> NULL,
> };
> --
> 2.25.4
>
