kernel/tools/testing/selftests/bpf/test_cgroup_storage.c, branch linux-5.2.y

selftests/bpf: fix test_cgroup_storage on s390

2019-09-21T05:18:32Z

[ Upstream commit 806ce6e2117a42528e7bb979e04e28229b34a612 ] test_cgroup_storage fails on s390 with an assertion failure: packets are dropped when they shouldn't. The problem is that BPF_DW packet count is accessed as BPF_W with an offset of 0, which is not correct on big-endian machines. Since the point of this test is not to verify narrow loads/stores, simply use BPF_DW when working with packet counts. Fixes: 68cfa3ac6b8d ("selftests/bpf: add a cgroup storage test") Fixes: 919646d2a3a9 ("selftests/bpf: extend the storage test to test per-cpu cgroup storage") Signed-off-by: Ilya Leoshkevich Signed-off-by: Daniel Borkmann Signed-off-by: Sasha Levin

selftests/bpf: fix incorrect users of create_and_get_cgroup

2019-01-07T21:15:55Z

We have some tests that assume create_and_get_cgroup returns -1 on error which is incorrect (it returns 0 on error). Since fd might be zero in general case, change create_and_get_cgroup to return -1 on error and fix the users that assume 0 on error. Fixes: f269099a7e7a ("tools/bpf: add a selftest for bpf_get_current_cgroup_id() helper") Fixes: 7d2c6cfc5411 ("bpf: use --cgroup in test_suite if supplied") v2: - instead of fixing the uses that assume -1 on error, convert the users that assume 0 on error (fd might be zero in general case) Signed-off-by: Stanislav Fomichev Signed-off-by: Alexei Starovoitov

selftests/bpf: extend the storage test to test per-cpu cgroup storage

2018-10-01T14:18:33Z

This test extends the cgroup storage test to use per-cpu flavor of the cgroup storage as well. The test initializes a per-cpu cgroup storage to some non-zero initial value (1000), and then simple bumps a per-cpu counter each time the shared counter is atomically incremented. Then it reads all per-cpu areas from the userspace side, and checks that the sum of values adds to the expected sum. Expected output: $ ./test_cgroup_storage test_cgroup_storage:PASS Signed-off-by: Roman Gushchin Acked-by: Song Liu Cc: Daniel Borkmann Cc: Alexei Starovoitov Signed-off-by: Daniel Borkmann

tools/bpf: fix bpf selftest test_cgroup_storage failure

2018-08-17T19:23:47Z

The bpf selftest test_cgroup_storage failed in one of our production test servers. # sudo ./test_cgroup_storage Failed to create map: Operation not permitted It turns out this is due to insufficient locked memory with system default 16KB. Similar to other self tests, let us arm the process with unlimited locked memory. With this change, the test passed. # sudo ./test_cgroup_storage test_cgroup_storage:PASS Fixes: 68cfa3ac6b8d ("selftests/bpf: add a cgroup storage test") Cc: Roman Gushchin Signed-off-by: Yonghong Song Acked-by: Roman Gushchin Signed-off-by: Alexei Starovoitov

selftests/bpf: add a cgroup storage test

2018-08-02T22:47:33Z

Implement a test to cover the cgroup storage functionality. The test implements a bpf program which drops every second packet by using the cgroup storage as a persistent storage. The test also use the userspace API to check the data in the cgroup storage, alter it, and check that the loaded and attached bpf program sees the update. Expected output: $ ./test_cgroup_storage test_cgroup_storage:PASS Signed-off-by: Roman Gushchin Cc: Alexei Starovoitov Cc: Daniel Borkmann Acked-by: Martin KaFai Lau Signed-off-by: Daniel Borkmann