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libbpf: Add ring__consume

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Add ring__consume to consume a single ringbuffer, analogous to
ring_buffer__consume.

Signed-off-by: Martin Kelly <martin.kelly@crowdstrike.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230925215045.2375758-14-martin.kelly@crowdstrike.com
This commit is contained in:
Martin Kelly
2023-09-25 14:50:44 -07:00
committed by Andrii Nakryiko
parent 6413c2d063
commit b520bcd7d8
3 changed files with 22 additions and 0 deletions
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11
src/ringbuf.c
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@@ -371,6 +371,17 @@ int ring__map_fd(const struct ring *r)
return r->map_fd;
}
int ring__consume(struct ring *r)
{
int64_t res;
res = ringbuf_process_ring(r);
if (res < 0)
return libbpf_err(res);
return res > INT_MAX ? INT_MAX : res;
}
static void user_ringbuf_unmap_ring(struct user_ring_buffer *rb)
{
if (rb->consumer_pos) {