bpf: sockmap: Don't attach programs to UDP sockets
The stream parser infrastructure isn't set up to deal with UDP
sockets, so we mustn't try to attach programs to them.
I remember making this change at some point, but I must have lost
it while rebasing or something similar.
Fixes: 7b98cd42b0
("bpf: sockmap: Add UDP support")
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/20200611172520.327602-1-lmb@cloudflare.com
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@ -424,10 +424,7 @@ static int sock_map_get_next_key(struct bpf_map *map, void *key, void *next)
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return 0;
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}
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static bool sock_map_redirect_allowed(const struct sock *sk)
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{
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return sk->sk_state != TCP_LISTEN;
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}
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static bool sock_map_redirect_allowed(const struct sock *sk);
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static int sock_map_update_common(struct bpf_map *map, u32 idx,
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struct sock *sk, u64 flags)
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@ -508,6 +505,11 @@ static bool sk_is_udp(const struct sock *sk)
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sk->sk_protocol == IPPROTO_UDP;
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}
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static bool sock_map_redirect_allowed(const struct sock *sk)
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{
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return sk_is_tcp(sk) && sk->sk_state != TCP_LISTEN;
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}
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static bool sock_map_sk_is_suitable(const struct sock *sk)
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{
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return sk_is_tcp(sk) || sk_is_udp(sk);
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