diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2023-10-23 23:44:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-12 12:11:41 +0300 |
| commit | ca19418abcf728f804e0e91358542bfd92bbbf58 (patch) | |
| tree | 3a69bc1eb65a797d658c7bd08ca5afb20cb2804a /include | |
| parent | a7fba17a0596df01003634316ec75c2174e882ed (diff) | |
| download | linux-ca19418abcf728f804e0e91358542bfd92bbbf58.tar.xz | |
tcp: define initial scaling factor value as a macro
[ Upstream commit 849ee75a38b297187c760bb1d23d8f2a7b1fc73e ]
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>
Stable-dep-of: 697a6c8cec03 ("tcp: increase the default TCP scaling ratio")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -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 a3840a2749c1..343cd0a5e8e1 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1460,13 +1460,15 @@ 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 */ |