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bpf: Support for per connection SYN/SYN-ACK RTOs

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This patch adds support for setting a per connection SYN and
SYN_ACK RTOs from within a BPF_SOCK_OPS program. For example,
to set small RTOs when it is known both hosts are within a
datacenter.

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 20:02:42 -07:00
committed by David S. Miller
parent ae16189efb
commit 8550f328f4
4 changed files with 17 additions and 2 deletions
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11
include/net/tcp.h
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@@ -2057,4 +2057,15 @@ static inline int tcp_call_bpf(struct sock *sk, int op)
}
#endif
static inline u32 tcp_timeout_init(struct sock *sk)
{
int timeout;
timeout = tcp_call_bpf(sk, BPF_SOCK_OPS_TIMEOUT_INIT);
if (timeout <= 0)
timeout = TCP_TIMEOUT_INIT;
return timeout;
}
#endif /* _TCP_H */