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| H A D | ringbuf.c | diff 0c38740c Thu Jun 17 18:28:24 MDT 2021 Andrii Nakryiko <andrii@kernel.org> selftests/bpf: Fix ringbuf test fetching map FD 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 <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210618002824.2081922-1-andrii@kernel.org diff 704e2beb Fri May 14 12:07:26 MDT 2021 Andrii Nakryiko <andrii@kernel.org> selftests/bpf: Test ringbuf mmap read-only and read-write restrictions 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 <cascardo@canonical.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210514180726.843157-1-andrii@kernel.org diff f6a8250e Mon Nov 30 15:33:35 MST 2020 Andrii Nakryiko <andrii@kernel.org> libbpf: Fix ring_buffer__poll() to return number of consumed samples 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 <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201130223336.904192-1-andrii@kernel.org diff 1f243622 Sun Jun 07 18:36:15 MDT 2020 Andrii Nakryiko <andriin@fb.com> selftests/bpf: Fix ringbuf selftest sample counting undeterminism 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 <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20200608003615.3549991-1-andriin@fb.com diff 1f243622 Sun Jun 07 18:36:15 MDT 2020 Andrii Nakryiko <andriin@fb.com> selftests/bpf: Fix ringbuf selftest sample counting undeterminism 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 <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20200608003615.3549991-1-andriin@fb.com diff 1f243622 Sun Jun 07 18:36:15 MDT 2020 Andrii Nakryiko <andriin@fb.com> selftests/bpf: Fix ringbuf selftest sample counting undeterminism 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 <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20200608003615.3549991-1-andriin@fb.com diff 9a5f25ad Mon Jun 01 23:03:49 MDT 2020 Andrii Nakryiko <andriin@fb.com> selftests/bpf: Fix sample_cnt shared between two threads 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 <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20200602050349.215037-1-andriin@fb.com |
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