On Wed, Oct 27, 2021 at 4:45 PM Joanne Koong [off-list ref] wrote:

This patch adds the libbpf infrastructure for supporting a
per-map-type "map_extra" field, whose definition will be
idiosyncratic depending on map type.

For example, for the bloom filter map, the lower 4 bits of
map_extra is used to denote the number of hash functions.

Please note that until libbpf 1.0 is here, the
"bpf_create_map_params" struct is used as a temporary
means for propagating the map_extra field to the kernel.

Signed-off-by: Joanne Koong <redacted>
---

LGTM.

Acked-by: Andrii Nakryiko <andrii@kernel.org>

 tools/lib/bpf/bpf.c              | 27 ++++++++++++++++++++++-
 tools/lib/bpf/bpf_gen_internal.h |  2 +-
 tools/lib/bpf/gen_loader.c       |  3 ++-
 tools/lib/bpf/libbpf.c           | 38 +++++++++++++++++++++++++++-----
 tools/lib/bpf/libbpf.h           |  3 +++
 tools/lib/bpf/libbpf.map         |  2 ++
 tools/lib/bpf/libbpf_internal.h  | 25 ++++++++++++++++++++-
 7 files changed, 91 insertions(+), 9 deletions(-)

[...]