From: Felix Maurer fmaurer@redhat.com
[ Upstream commit 8c0be0631d81e48f77d0ebf0534c86e32bef5f89 ]
The bind_perm BPF selftest failed when port 111/tcp was already in use during the test. To fix this, the test now runs in its own network name space.
To use unshare, it is necessary to reorder the includes. The style of the includes is adapted to be consistent with the other prog_tests.
v2: Replace deprecated CHECK macro with ASSERT_OK
Fixes: 8259fdeb30326 ("selftests/bpf: Verify that rebinding to port < 1024 from BPF works") Signed-off-by: Felix Maurer fmaurer@redhat.com Signed-off-by: Andrii Nakryiko andrii@kernel.org Reviewed-by: Jakub Sitnicki jakub@cloudflare.com Link: https://lore.kernel.org/bpf/551ee65533bb987a43f93d88eaf2368b416ccd32.1642518... Signed-off-by: Sasha Levin sashal@kernel.org --- .../selftests/bpf/prog_tests/bind_perm.c | 20 ++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/bind_perm.c b/tools/testing/selftests/bpf/prog_tests/bind_perm.c index d0f06e40c16d..eac71fbb24ce 100644 --- a/tools/testing/selftests/bpf/prog_tests/bind_perm.c +++ b/tools/testing/selftests/bpf/prog_tests/bind_perm.c @@ -1,13 +1,24 @@ // SPDX-License-Identifier: GPL-2.0 -#include <test_progs.h> -#include "bind_perm.skel.h" - +#define _GNU_SOURCE +#include <sched.h> +#include <stdlib.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/capability.h>
+#include "test_progs.h" +#include "bind_perm.skel.h" + static int duration;
+static int create_netns(void) +{ + if (!ASSERT_OK(unshare(CLONE_NEWNET), "create netns")) + return -1; + + return 0; +} + void try_bind(int family, int port, int expected_errno) { struct sockaddr_storage addr = {}; @@ -75,6 +86,9 @@ void test_bind_perm(void) struct bind_perm *skel; int cgroup_fd;
+ if (create_netns()) + return; + cgroup_fd = test__join_cgroup("/bind_perm"); if (CHECK(cgroup_fd < 0, "cg-join", "errno %d", errno)) return;