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libbpf: Add ring__avail_data_size

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Add ring__avail_data_size for querying the currently available data in
the ringbuffer, similar to the BPF_RB_AVAIL_DATA flag in
bpf_ringbuf_query. This is racy during ongoing operations but is still
useful for overall information on how a ringbuffer is behaving.

Signed-off-by: Martin Kelly <martin.kelly@crowdstrike.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230925215045.2375758-8-martin.kelly@crowdstrike.com
This commit is contained in:
Martin Kelly
2023-09-25 14:50:38 -07:00
committed by Andrii Nakryiko
parent 2ad16b970a
commit 3e675ed6ab
3 changed files with 21 additions and 0 deletions
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src/libbpf.map
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@@ -400,6 +400,7 @@ LIBBPF_1.3.0 {
bpf_program__attach_netfilter;
bpf_program__attach_tcx;
bpf_program__attach_uprobe_multi;
ring__avail_data_size;
ring__consumer_pos;
ring__producer_pos;
ring_buffer__ring;