Confirm we get the same results using ring_buffer__query from the usermode side as from the corresponding BPF helper. Signed-off-by: Martin Kelly <martin.kelly@xxxxxxxxxxxxxxx> --- .../selftests/bpf/prog_tests/ringbuf.c | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/ringbuf.c b/tools/testing/selftests/bpf/prog_tests/ringbuf.c index ac104dc652e3..93dcb92fc0c5 100644 --- a/tools/testing/selftests/bpf/prog_tests/ringbuf.c +++ b/tools/testing/selftests/bpf/prog_tests/ringbuf.c @@ -91,6 +91,7 @@ static void ringbuf_subtest(void) int err, cnt, rb_fd; int page_size = getpagesize(); void *mmap_ptr, *tmp_ptr; + __u64 val; skel = test_ringbuf_lskel__open(); if (CHECK(!skel, "skel_open", "skeleton open failed\n")) @@ -176,6 +177,27 @@ static void ringbuf_subtest(void) "err_prod_pos", "exp %ld, got %ld\n", 3L * rec_sz, skel->bss->prod_pos); + /* verify the same results from the usermode side */ + val = ring_buffer__query(ringbuf, 0, BPF_RB_AVAIL_DATA); + CHECK(val != 3 * rec_sz, + "err_query_avail_size", "exp %ld, got %llu\n", + 3L * rec_sz, val); + + val = ring_buffer__query(ringbuf, 0, BPF_RB_RING_SIZE); + CHECK(val != page_size, + "err_query_ring_size", "exp %ld, got %llu\n", + (long)page_size, val); + + val = ring_buffer__query(ringbuf, 0, BPF_RB_CONS_POS); + CHECK(val != 0, + "err_query_cons_pos", "exp %ld, got %llu\n", + 0L, val); + + val = ring_buffer__query(ringbuf, 0, BPF_RB_PROD_POS); + CHECK(val != 3 * rec_sz, + "err_query_prod_pos", "exp %ld, got %llu\n", + 3L * rec_sz, val); + /* poll for samples */ err = ring_buffer__poll(ringbuf, -1); -- 2.34.1
