diff options
| author |   Andrii Nakryiko <andriin@fb.com> | 2020-07-31 11:28:28 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-08-01 20:38:28 -0700 |
| commit | 90806ccc90bbd0150267a97ae4003269597a6a6c (patch) | |
| tree | 9a3eb6b6cda28f4689509797816966e648cf84fb /tools/testing/selftests/bpf/prog_tests/cgroup_link.c | |
| parent | libbpf: Add bpf_link detach APIs (diff) | |
| download | linux-dev-90806ccc90bbd0150267a97ae4003269597a6a6c.tar.xz linux-dev-90806ccc90bbd0150267a97ae4003269597a6a6c.zip | |
selftests/bpf: Add link detach tests for cgroup, netns, and xdp bpf_links
Add bpf_link__detach() testing to selftests for cgroup, netns, and xdp
bpf_links.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200731182830.286260-4-andriin@fb.com
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/cgroup_link.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/cgroup_link.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/cgroup_link.c b/tools/testing/selftests/bpf/prog_tests/cgroup_link.c index 6e04f8d1d15b..4d9b514b3fd9 100644 --- a/tools/testing/selftests/bpf/prog_tests/cgroup_link.c +++ b/tools/testing/selftests/bpf/prog_tests/cgroup_link.c @@ -2,6 +2,7 @@ #include <test_progs.h> #include "cgroup_helpers.h" +#include "testing_helpers.h" #include "test_cgroup_link.skel.h" static __u32 duration = 0; @@ -37,7 +38,8 @@ void test_cgroup_link(void) int last_cg = ARRAY_SIZE(cgs) - 1, cg_nr = ARRAY_SIZE(cgs); DECLARE_LIBBPF_OPTS(bpf_link_update_opts, link_upd_opts); struct bpf_link *links[ARRAY_SIZE(cgs)] = {}, *tmp_link; - __u32 prog_ids[ARRAY_SIZE(cgs)], prog_cnt = 0, attach_flags; + __u32 prog_ids[ARRAY_SIZE(cgs)], prog_cnt = 0, attach_flags, prog_id; + struct bpf_link_info info; int i = 0, err, prog_fd; bool detach_legacy = false; @@ -219,6 +221,22 @@ void test_cgroup_link(void) /* BPF programs should still get called */ ping_and_check(0, cg_nr); + prog_id = link_info_prog_id(links[0], &info); + CHECK(prog_id == 0, "link_info", "failed\n"); + CHECK(info.cgroup.cgroup_id == 0, "cgroup_id", "unexpected %llu\n", info.cgroup.cgroup_id); + + err = bpf_link__detach(links[0]); + if (CHECK(err, "link_detach", "failed %d\n", err)) + goto cleanup; + + /* cgroup_id should be zero in link_info */ + prog_id = link_info_prog_id(links[0], &info); + CHECK(prog_id == 0, "link_info", "failed\n"); + CHECK(info.cgroup.cgroup_id != 0, "cgroup_id", "unexpected %llu\n", info.cgroup.cgroup_id); + + /* First BPF program shouldn't be called anymore */ + ping_and_check(0, cg_nr - 1); + /* leave cgroup and remove them, don't detach programs */ cleanup_cgroup_environment(); |