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bpf: Add TCP connection BPF callbacks

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Added callbacks to BPF SOCK_OPS type program before an active
connection is intialized and after a passive or active connection is
established.

The following patch demostrates how they can be used to set send and
receive buffer sizes.

Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lawrence Brakmo
2017-06-30 20:02:47 -07:00
committed by David S. Miller
parent 8c4b4c7e9f
commit 9872a4bde3
4 changed files with 15 additions and 1 deletions
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1
net/ipv4/tcp_output.c
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@@ -3444,6 +3444,7 @@ int tcp_connect(struct sock *sk)
struct sk_buff *buff;
int err;
tcp_call_bpf(sk, BPF_SOCK_OPS_TCP_CONNECT_CB);
tcp_connect_init(sk);
if (unlikely(tp->repair)) {