kernel/linux.git/tools/testing/selftests/bpf/test_dev_cgroup.c, branch v6.6.134

selftests/bpf: Store BPF object files with .bpf.o extension

2022-09-02T13:55:37+00:00

BPF object files are, in a way, the final artifact produced as part of the ahead-of-time compilation process. That makes them somewhat special compared to "regular" object files, which are a intermediate build artifacts that can typically be removed safely. As such, it can make sense to name them differently to make it easier to spot this difference at a glance. Among others, libbpf-bootstrap [0] has established the extension .bpf.o for BPF object files. It seems reasonable to follow this example and establish the same denomination for selftest build artifacts. To that end, this change adjusts the corresponding part of the build system and the test programs loading BPF object files to work with .bpf.o files. [0] https://github.com/libbpf/libbpf-bootstrap Suggested-by: Andrii Nakryiko Signed-off-by: Daniel Müller Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20220901222253.1199242-1-deso@posteo.net

selftests/bpf: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCK

2022-04-11T03:17:16+00:00

We have switched to memcg-based memory accouting and thus the rlimit is not needed any more. LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK was introduced in libbpf for backward compatibility, so we can use it instead now. After this change, the header tools/testing/selftests/bpf/bpf_rlimit.h can be removed. This patch also removes the useless header sys/resource.h from many files in tools/testing/selftests/bpf/. Signed-off-by: Yafang Shao Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220409125958.92629-3-laoar.shao@gmail.com

selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere

2021-11-07T16:34:23+00:00

-Dbpf_prog_load_deprecated=bpf_prog_test_load trick is both ugly and breaks when deprecation goes into effect due to macro magic. Convert all the uses to explicit bpf_prog_test_load() calls which avoid deprecation errors and makes everything less magical. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Acked-by: Dave Marchevsky Link: https://lore.kernel.org/bpf/20211103220845.2676888-12-andrii@kernel.org

bpf, selftests: Use single cgroup helpers for both test_sockmap/progs

2020-08-02T03:20:59+00:00

Nearly every user of cgroup helpers does the same sequence of API calls. So push these into a single helper cgroup_setup_and_join. The cases that do a bit of extra logic are test_progs which currently uses an env variable to decide if it needs to setup the cgroup environment or can use an existingi environment. And then tests that are doing cgroup tests themselves. We skip these cases for now. Signed-off-by: John Fastabend Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/159623335418.30208.15807461815525100199.stgit@john-XPS-13-9370

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206

2019-05-30T18:29:53+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of version 2 of the gnu general public license as published by the free software foundation extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 107 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Richard Fontana Reviewed-by: Steve Winslow Reviewed-by: Alexios Zavras Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.615055994@linutronix.de Signed-off-by: Greg Kroah-Hartman

selftests/bpf: fix incorrect users of create_and_get_cgroup

2019-01-07T21:15:55+00:00

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

bpf: unify rlimit handling in selftests

2018-02-27T04:11:23+00:00

Unify memlock handling into bpf_rlimit.h and replace all occurences in BPF kselftests with it. Signed-off-by: Daniel Borkmann Acked-by: Alexei Starovoitov Signed-off-by: Alexei Starovoitov

selftests/bpf: fix test_dev_cgroup

2018-01-23T17:42:12+00:00

The test incorrectly doing mkdir /mnt/cgroup-test-work-dirtest-bpf-based-device-cgroup instead of mkdir /mnt/cgroup-test-work-dir/test-bpf-based-device-cgroup somehow such mkdir succeeds and new directory appears: /mnt/cgroup-test-work-dir/cgroup-test-work-dirtest-bpf-based-device-cgroup Later cleanup via nftw("/mnt/cgroup-test-work-dir", ...); doesn't walk this directory. "rmdir /mnt/cgroup-test-work-dir" succeeds, but bpf program and dangling cgroup stays in memory. That's a separate issue on a cgroup side. For now fix the test. Fixes: 37f1ba0909df ("selftests/bpf: add a test for device cgroup controller") Signed-off-by: Alexei Starovoitov Signed-off-by: Daniel Borkmann

tools/bpf: adjust rlimit RLIMIT_MEMLOCK for test_dev_cgroup

2017-12-21T03:15:54+00:00

The default rlimit RLIMIT_MEMLOCK is 64KB. In certain cases, e.g. in a test machine mimicking our production system, this test may fail due to unable to charge the required memory for prog load: $ ./test_dev_cgroup libbpf: load bpf program failed: Operation not permitted libbpf: failed to load program 'cgroup/dev' libbpf: failed to load object './dev_cgroup.o' Failed to load DEV_CGROUP program ... Changing the default rlimit RLIMIT_MEMLOCK to unlimited makes the test pass. This patch also fixed a problem where when bpf_prog_load fails, cleanup_cgroup_environment() should not be called since setup_cgroup_environment() has not been invoked. Otherwise, the following confusing message will appear: ... (/home/yhs/local/linux/tools/testing/selftests/bpf/cgroup_helpers.c:95: errno: No such file or directory) Opening Cgroup Procs: /mnt/cgroup.procs ... Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov

selftests/bpf: add a test for device cgroup controller

2017-11-05T14:26:51+00:00

Add a test for device cgroup controller. The test loads a simple bpf program which logs all device access attempts using trace_printk() and forbids all operations except operations with /dev/zero and /dev/urandom. Then the test creates and joins a test cgroup, and attaches the bpf program to it. Then it tries to perform some simple device operations and checks the result: create /dev/null (should fail) create /dev/zero (should pass) copy data from /dev/urandom to /dev/zero (should pass) copy data from /dev/urandom to /dev/full (should fail) copy data from /dev/random to /dev/zero (should fail) Signed-off-by: Roman Gushchin Acked-by: Alexei Starovoitov Acked-by: Tejun Heo Cc: Daniel Borkmann Signed-off-by: David S. Miller