• Daniel Borkmann's avatar
    bpf: refactor bpf_prog_get and type check into helper · 113214be
    Daniel Borkmann authored
    Since bpf_prog_get() and program type check is used in a couple of places,
    refactor this into a small helper function that we can make use of. Since
    the non RO prog->aux part is not used in performance critical paths and a
    program destruction via RCU is rather very unlikley when doing the put, we
    shouldn't have an issue just doing the bpf_prog_get() + prog->type != type
    check, but actually not taking the ref at all (due to being in fdget() /
    fdput() section of the bpf fd) is even cleaner and makes the diff smaller
    as well, so just go for that. Callsites are changed to make use of the new
    helper where possible.
    Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
    Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    113214be
act_bpf.c 9.68 KB