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authorLawrence Brakmo2017-07-01 05:02:42 +0200
committerDavid S. Miller2017-07-02 01:15:13 +0200
commit8550f328f45db6d37981eb2041bc465810245c03 (patch)
treee3594097d7b3c9dc3176c8f9084431cf24d79cf6 /include/net/tcp.h
parentbpf: program to load and attach sock_ops BPF progs (diff)
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bpf: Support for per connection SYN/SYN-ACK RTOs
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>
Diffstat (limited to 'include/net/tcp.h')
-rw-r--r--include/net/tcp.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index e58500825006..564af2dee236 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -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 */