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selftests/bpf: Add tests for ring_buffer__ring

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Add tests for the new API ring_buffer__ring.

Signed-off-by: Martin Kelly <martin.kelly@crowdstrike.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230925215045.2375758-5-martin.kelly@crowdstrike.com
This commit is contained in:
Martin Kelly 2023-09-25 14:50:35 -07:00 committed by Andrii Nakryiko
parent 1c97f6afd7
commit c1ad2e47f9
1 changed files with 15 additions and 0 deletions
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15
tools/testing/selftests/bpf/prog_tests/ringbuf_multi.c
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@ -42,6 +42,8 @@ void test_ringbuf_multi(void)
{
struct test_ringbuf_multi *skel;
struct ring_buffer *ringbuf = NULL;
struct ring *ring_old;
struct ring *ring;
int err;
int page_size = getpagesize();
int proto_fd = -1;
@ -84,11 +86,24 @@ void test_ringbuf_multi(void)
if (CHECK(!ringbuf, "ringbuf_create", "failed to create ringbuf\n"))
goto cleanup;
/* verify ring_buffer__ring returns expected results */
ring = ring_buffer__ring(ringbuf, 0);
if (!ASSERT_OK_PTR(ring, "ring_buffer__ring_idx_0"))
goto cleanup;
ring_old = ring;
ring = ring_buffer__ring(ringbuf, 1);
ASSERT_ERR_PTR(ring, "ring_buffer__ring_idx_1");
err = ring_buffer__add(ringbuf, bpf_map__fd(skel->maps.ringbuf2),
process_sample, (void *)(long)2);
if (CHECK(err, "ringbuf_add", "failed to add another ring\n"))
goto cleanup;
/* verify adding a new ring didn't invalidate our older pointer */
ring = ring_buffer__ring(ringbuf, 0);
if (!ASSERT_EQ(ring, ring_old, "ring_buffer__ring_again"))
goto cleanup;
err = test_ringbuf_multi__attach(skel);
if (CHECK(err, "skel_attach", "skeleton attachment failed: %d\n", err))
goto cleanup;