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2024-06-24selftests/bpf: Add more ring buffer test coverageDaniel Borkmann1-0/+56
Add test coverage for reservations beyond the ring buffer size in order to validate that bpf_ringbuf_reserve() rejects the request with NULL, all other ring buffer tests keep passing as well: # ./vmtest.sh -- ./test_progs -t ringbuf [...] ./test_progs -t ringbuf [ 1.165434] bpf_testmod: loading out-of-tree module taints kernel. [ 1.165825] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel [ 1.284001] tsc: Refined TSC clocksource calibration: 3407.982 MHz [ 1.286871] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fc34e357, max_idle_ns: 440795379773 ns [ 1.289555] clocksource: Switched to clocksource tsc #274/1 ringbuf/ringbuf:OK #274/2 ringbuf/ringbuf_n:OK #274/3 ringbuf/ringbuf_map_key:OK #274/4 ringbuf/ringbuf_write:OK #274 ringbuf:OK #275 ringbuf_multi:OK [...] Signed-off-by: Daniel Borkmann <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> [ Test fixups for getting BPF CI back to work ] Signed-off-by: Daniel Borkmann <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2024-04-25selftests/bpf: Add ring_buffer__consume_n test.Andrea Righi1-0/+65
Add a testcase for the ring_buffer__consume_n() API. The test produces multiple samples in a ring buffer, using a sys_getpid() fentry prog, and consumes them from user-space in batches, rather than consuming all of them greedily, like ring_buffer__consume() does. Signed-off-by: Andrea Righi <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Acked-by: Jiri Olsa <[email protected]> Link: https://lore.kernel.org/lkml/CAEf4BzaR4zqUpDmj44KNLdpJ=Tpa97GrvzuzVNO5nM6b7oWd1w@mail.gmail.com Link: https://lore.kernel.org/bpf/[email protected]
2023-09-25selftests/bpf: Add tests for ring__consumeMartin Kelly1-0/+4
Add tests for new API ring__consume. Signed-off-by: Martin Kelly <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2023-09-25selftests/bpf: Add tests for ring__map_fdMartin Kelly1-0/+4
Add tests for the new API ring__map_fd. Signed-off-by: Martin Kelly <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2023-09-25selftests/bpf: Add tests for ring__sizeMartin Kelly1-1/+3
Add tests for the new API ring__size. Signed-off-by: Martin Kelly <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2023-09-25selftests/bpf: Add tests for ring__avail_data_sizeMartin Kelly1-1/+3
Add test for the new API ring__avail_data_size. Signed-off-by: Martin Kelly <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2023-09-25selftests/bpf: Add tests for ring__*_posMartin Kelly1-0/+14
Add tests for the new APIs ring__producer_pos and ring__consumer_pos. Signed-off-by: Martin Kelly <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2022-10-21selftests/bpf: Add test verifying bpf_ringbuf_reserve retval use in map opsDave Marchevsky1-1/+65
Add a test_ringbuf_map_key test prog, borrowing heavily from extant test_ringbuf.c. The program tries to use the result of bpf_ringbuf_reserve as map_key, which was not possible before previouis commits in this series. The test runner added to prog_tests/ringbuf.c verifies that the program loads and does basic sanity checks to confirm that it runs as expected. Also, refactor test_ringbuf such that runners for existing test_ringbuf and newly-added test_ringbuf_map_key are subtests of 'ringbuf' top-level test. Signed-off-by: Dave Marchevsky <[email protected]> Acked-by: Yonghong Song <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Alexei Starovoitov <[email protected]>
2021-10-28selftests/bpf: Add weak/typeless ksym test for light skeletonKumar Kartikeya Dwivedi1-6/+6
Also, avoid using CO-RE features, as lskel doesn't support CO-RE, yet. Include both light and libbpf skeleton in same file to test both of them together. In c48e51c8b07a ("bpf: selftests: Add selftests for module kfunc support"), I added support for generating both lskel and libbpf skel for a BPF object, however the name parameter for bpftool caused collisions when included in same file together. This meant that every test needed a separate file for a libbpf/light skeleton separation instead of subtests. Change that by appending a "_lskel" suffix to the name for files using light skeleton, and convert all existing users. Signed-off-by: Kumar Kartikeya Dwivedi <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-06-17selftests/bpf: Fix ringbuf test fetching map FDAndrii Nakryiko1-1/+1
Seems like 4d1b62986125 ("selftests/bpf: Convert few tests to light skeleton.") and 704e2beba23c ("selftests/bpf: Test ringbuf mmap read-only and read-write restrictions") were done independently on bpf and bpf-next trees and are in conflict with each other, despite a clean merge. Fix fetching of ringbuf's map_fd to use light skeleton properly. Fixes: 704e2beba23c ("selftests/bpf: Test ringbuf mmap read-only and read-write restrictions") Fixes: 4d1b62986125 ("selftests/bpf: Convert few tests to light skeleton.") Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-05-27Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-1/+48
cdc-wdm: s/kill_urbs/poison_urbs/ to fix build Signed-off-by: Jakub Kicinski <[email protected]>
2021-05-20selftests/bpf: Test ringbuf mmap read-only and read-write restrictionsAndrii Nakryiko1-1/+48
Extend ringbuf selftest to validate read/write and read-only restrictions on memory mapping consumer/producer/data pages. Ensure no "escalations" from PROT_READ to PROT_WRITE/PROT_EXEC is allowed. And test that mremap() fails to expand mmap()'ed area. Signed-off-by: Thadeu Lima de Souza Cascardo <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-05-19selftests/bpf: Convert few tests to light skeleton.Alexei Starovoitov1-5/+3
Convert few tests that don't use CO-RE to light skeleton. Signed-off-by: Alexei Starovoitov <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-04-08selftests/bpf: ringbuf: Use runtime page sizeYauheni Kaliuta1-4/+13
Replace hardcoded 4096 with runtime value in the userspace part of the test and set bpf table sizes dynamically according to the value. Do not switch to ASSERT macros, keep CHECK, for consistency with the rest of the test. Can be a separate cleanup patch. Signed-off-by: Yauheni Kaliuta <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-12-01selftests/bpf: Drain ringbuf samples at the end of testAndrii Nakryiko1-0/+6
Avoid occasional test failures due to the last sample being delayed to another ring_buffer__poll() call. Instead, drain samples completely with ring_buffer__consume(). This is supposed to fix a rare and non-deterministic test failure in libbpf CI. Fixes: cb1c9ddd5525 ("selftests/bpf: Add BPF ringbuf selftests") Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-12-01libbpf: Fix ring_buffer__poll() to return number of consumed samplesAndrii Nakryiko1-1/+1
Fix ring_buffer__poll() to return the number of non-discarded records consumed, just like its documentation states. It's also consistent with ring_buffer__consume() return. Fix up selftests with wrong expected results. Fixes: bf99c936f947 ("libbpf: Add BPF ring buffer support") Fixes: cb1c9ddd5525 ("selftests/bpf: Add BPF ringbuf selftests") Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-06-08selftests/bpf: Fix ringbuf selftest sample counting undeterminismAndrii Nakryiko1-7/+35
Fix test race, in which background poll can get either 5 or 6 samples, depending on timing of notification. Prevent this by open-coding sample triggering and forcing notification for the very last sample only. Also switch to using atomic increments and exchanges for more obviously reliable counting and checking. Additionally, check expected processed sample counters for single-threaded use cases as well. Fixes: 9a5f25ad30e5 ("selftests/bpf: Fix sample_cnt shared between two threads") Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-06-02selftests/bpf: Fix sample_cnt shared between two threadsAndrii Nakryiko1-1/+1
Make sample_cnt volatile to fix possible selftests failure due to compiler optimization preventing latest sample_cnt value to be visible to main thread. sample_cnt is incremented in background thread, which is then joined into main thread. So in terms of visibility sample_cnt update is ok. But because it's not volatile, compiler might make optimizations that would prevent main thread to see latest updated value. Fix this by marking global variable volatile. Fixes: cb1c9ddd5525 ("selftests/bpf: Add BPF ringbuf selftests") Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2020-06-01selftests/bpf: Add BPF ringbuf selftestsAndrii Nakryiko1-0/+211
Both singleton BPF ringbuf and BPF ringbuf with map-in-map use cases are tested. Also reserve+submit/discards and output variants of API are validated. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Link: https://lore.kernel.org/bpf/[email protected] Signed-off-by: Alexei Starovoitov <[email protected]>
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