Support/examples for batch operations

[esemeniuc]

Libbpf offers batch operations to save on syscalls for iterating over maps, for example bpf_map_lookup_and_delete_batch or BPF_MAP_UPDATE_BATCH in https://libbpf.readthedocs.io/en/latest/api.html. I see some bindings at

aya/ebpf/aya-ebpf-bindings/src/x86_64/bindings.rs

Line 546 in 78ee9a4

pub const BPF_MAP_LOOKUP_AND_DELETE_BATCH: Type = 25;

, however it is not clear how they should be used with aya's Hashmap implementation. Anywhere I can look to point me in the right direction?

The closest example I see is

aya/aya/src/sys/bpf.rs

Line 248 in 78ee9a4

lookup(fd, key, flags, bpf_cmd::BPF_MAP_LOOKUP_AND_DELETE_ELEM)

(which is not batched, and lookup is not public)

[esemeniuc]

Current workaround: #1125 (comment)