From: Stanislav Fomichev sdf@google.com
[ Upstream commit 8ac88eece8009428e2577c345080a458e4507e2f ]
Jiri reports broken test_progs after recent commit 68f8e3d4b916 ("selftests/bpf: Make sure zero-len skbs aren't redirectable"). Apparently we don't remount debugfs when we switch back networking namespace. Let's explicitly mount /sys/kernel/debug.
0: https://lore.kernel.org/bpf/63b85917-a2ea-8e35-620c-808560910819@meta.com/T/...
Fixes: a30338840fa5 ("selftests/bpf: Move open_netns() and close_netns() into network_helpers.c") Reported-by: Jiri Olsa olsajiri@gmail.com Signed-off-by: Stanislav Fomichev sdf@google.com Link: https://lore.kernel.org/r/20221123200829.2226254-1-sdf@google.com Signed-off-by: Alexei Starovoitov ast@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/bpf/network_helpers.c | 4 ++++ tools/testing/selftests/bpf/prog_tests/empty_skb.c | 2 +- tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c | 2 +- tools/testing/selftests/bpf/prog_tests/xdp_synproxy.c | 2 +- 4 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c index bec15558fd93..1f37adff7632 100644 --- a/tools/testing/selftests/bpf/network_helpers.c +++ b/tools/testing/selftests/bpf/network_helpers.c @@ -426,6 +426,10 @@ static int setns_by_fd(int nsfd) if (!ASSERT_OK(err, "mount /sys/fs/bpf")) return err;
+ err = mount("debugfs", "/sys/kernel/debug", "debugfs", 0, NULL); + if (!ASSERT_OK(err, "mount /sys/kernel/debug")) + return err; + return 0; }
diff --git a/tools/testing/selftests/bpf/prog_tests/empty_skb.c b/tools/testing/selftests/bpf/prog_tests/empty_skb.c index 32dd731e9070..0613f3bb8b5e 100644 --- a/tools/testing/selftests/bpf/prog_tests/empty_skb.c +++ b/tools/testing/selftests/bpf/prog_tests/empty_skb.c @@ -9,7 +9,7 @@ goto out; \ })
-void test_empty_skb(void) +void serial_test_empty_skb(void) { LIBBPF_OPTS(bpf_test_run_opts, tattr); struct empty_skb *bpf_obj = NULL; diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c b/tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c index a50971c6cf4a..9ac6f6a268db 100644 --- a/tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c +++ b/tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c @@ -85,7 +85,7 @@ static void test_max_pkt_size(int fd) }
#define NUM_PKTS 10000 -void test_xdp_do_redirect(void) +void serial_test_xdp_do_redirect(void) { int err, xdp_prog_fd, tc_prog_fd, ifindex_src, ifindex_dst; char data[sizeof(pkt_udp) + sizeof(__u32)]; diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_synproxy.c b/tools/testing/selftests/bpf/prog_tests/xdp_synproxy.c index 874a846e298c..b49d14580e51 100644 --- a/tools/testing/selftests/bpf/prog_tests/xdp_synproxy.c +++ b/tools/testing/selftests/bpf/prog_tests/xdp_synproxy.c @@ -174,7 +174,7 @@ static void test_synproxy(bool xdp) system("ip netns del synproxy"); }
-void test_xdp_synproxy(void) +void serial_test_xdp_synproxy(void) { if (test__start_subtest("xdp")) test_synproxy(true);