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Commit f83fb22c authored by Jakub Kicinski's avatar Jakub Kicinski Committed by Daniel Borkmann
Browse files

tools: libbpf: recognize offload neutral maps 



Add helper to libbpf for recognizing maps which should not have
ifindex set when program is loaded.  These maps only contain
host metadata and therefore are not marked for offload, e.g.
the perf event map.

Use this helper in bpf_prog_load_xattr().

Signed-off-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: default avatarQuentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 49f2cba3

tools/lib/bpf/libbpf.c

+7 −1
Original line number Diff line number Diff line
@@ -2154,6 +2154,11 @@ void *bpf_map__priv(struct bpf_map *map) 
	return map ? map->priv : ERR_PTR(-EINVAL);

}



bool bpf_map__is_offload_neutral(struct bpf_map *map)

{

	return map->def.type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;

}



void bpf_map__set_ifindex(struct bpf_map *map, __u32 ifindex)

{

	map->map_ifindex = ifindex;
@@ -2278,6 +2283,7 @@ int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr, 
	}



	bpf_map__for_each(map, obj) {

		if (!bpf_map__is_offload_neutral(map))

			map->map_ifindex = attr->ifindex;

	}

tools/lib/bpf/libbpf.h

+1 −0
Original line number Diff line number Diff line
@@ -255,6 +255,7 @@ typedef void (*bpf_map_clear_priv_t)(struct bpf_map *, void *); 
int bpf_map__set_priv(struct bpf_map *map, void *priv,

		      bpf_map_clear_priv_t clear_priv);

void *bpf_map__priv(struct bpf_map *map);

bool bpf_map__is_offload_neutral(struct bpf_map *map);

void bpf_map__set_ifindex(struct bpf_map *map, __u32 ifindex);

int bpf_map__pin(struct bpf_map *map, const char *path);