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authorLawrence Brakmo <brakmo@fb.com>2017-06-30 20:02:49 -0700
committerDavid S. Miller <davem@davemloft.net>2017-07-01 16:15:14 -0700
commit91b5b21c7c16899abb37f4a9e4388b4e9aae0b9d (patch)
treeff5989374783d9f11e822906a98e94d08a6f135a /include/net
parentd9925368a641391f38cd281e67b948e6b6f3bcca (diff)
downloadlinux-91b5b21c7c16899abb37f4a9e4388b4e9aae0b9d.tar.bz2
bpf: Add support for changing congestion control
Added support for changing congestion control for SOCK_OPS bpf programs through the setsockopt bpf helper function. It also adds a new SOCK_OPS op, BPF_SOCK_OPS_NEEDS_ECN, that is needed for congestion controls, like dctcp, that need to enable ECN in the SYN packets. Signed-off-by: Lawrence Brakmo <brakmo@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/tcp.h9
1 files changed, 8 insertions, 1 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index d6bb3948203d..70483296157f 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1004,7 +1004,9 @@ void tcp_get_default_congestion_control(char *name);
void tcp_get_available_congestion_control(char *buf, size_t len);
void tcp_get_allowed_congestion_control(char *buf, size_t len);
int tcp_set_allowed_congestion_control(char *allowed);
-int tcp_set_congestion_control(struct sock *sk, const char *name);
+int tcp_set_congestion_control(struct sock *sk, const char *name, bool load);
+void tcp_reinit_congestion_control(struct sock *sk,
+ const struct tcp_congestion_ops *ca);
u32 tcp_slow_start(struct tcp_sock *tp, u32 acked);
void tcp_cong_avoid_ai(struct tcp_sock *tp, u32 w, u32 acked);
@@ -2078,4 +2080,9 @@ static inline u32 tcp_rwnd_init_bpf(struct sock *sk)
rwnd = 0;
return rwnd;
}
+
+static inline bool tcp_bpf_ca_needs_ecn(struct sock *sk)
+{
+ return (tcp_call_bpf(sk, BPF_SOCK_OPS_NEEDS_ECN) == 1);
+}
#endif /* _TCP_H */