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/linux-6.15/kernel/bpf/
H A Dmap_in_map.c40ec00ab Thu Jul 15 00:54:12 GMT 2021 Alexei Starovoitov <[email protected]> bpf: Remember BTF of inner maps.

BTF is required for 'struct bpf_timer' to be recognized inside map value.
The bpf timers are supported inside inner maps.
Remember 'struct btf *' in inner_map_meta to make it available
to the verifier in the sequence:

struct bpf_map *inner_map = bpf_map_lookup_elem(&outer_map, ...);
if (inner_map)
timer = bpf_map_lookup_elem(&inner_map, ...);

Signed-off-by: Alexei Starovoitov <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Yonghong Song <[email protected]>
Acked-by: Martin KaFai Lau <[email protected]>
Acked-by: Andrii Nakryiko <[email protected]>
Acked-by: Toke Høiland-Jørgensen <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]