diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2023-10-23 13:44:37 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-10-25 12:23:34 -0700 |
| commit | 849ee75a38b297187c760bb1d23d8f2a7b1fc73e (patch) | |
| tree | 66a1df43746963e09dc1df3fa95178841e187b49 /include/net/tcp.h | |
| parent | f1f26512a9bf18f7a4c0d59df113a49f39d7d4b6 (diff) | |
| download | linux-849ee75a38b297187c760bb1d23d8f2a7b1fc73e.tar.gz | |
tcp: define initial scaling factor value as a macro
So that other users could access it. Notably MPTCP will use
it in the next patch.
No functional change intended.
Acked-by: Matthieu Baerts <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-4-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net/tcp.h')
| -rw-r--r-- | include/net/tcp.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 39b731c900dd5..993b7fcd4e461 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1489,13 +1489,15 @@ static inline int tcp_space_from_win(const struct sock *sk, int win) return __tcp_space_from_win(tcp_sk(sk)->scaling_ratio, win); } +/* Assume a conservative default of 1200 bytes of payload per 4K page. + * This may be adjusted later in tcp_measure_rcv_mss(). + */ +#define TCP_DEFAULT_SCALING_RATIO ((1200 << TCP_RMEM_TO_WIN_SCALE) / \ + SKB_TRUESIZE(4096)) + static inline void tcp_scaling_ratio_init(struct sock *sk) { - /* Assume a conservative default of 1200 bytes of payload per 4K page. - * This may be adjusted later in tcp_measure_rcv_mss(). - */ - tcp_sk(sk)->scaling_ratio = (1200 << TCP_RMEM_TO_WIN_SCALE) / - SKB_TRUESIZE(4096); + tcp_sk(sk)->scaling_ratio = TCP_DEFAULT_SCALING_RATIO; } /* Note: caller must be prepared to deal with negative returns */ |