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| author |   Linus Walleij <linus.walleij@linaro.org> | 2022-05-01 23:25:10 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2022-05-01 23:25:10 +0200 |
| commit | f930b69a8944ab3f018e2a175ddbd16e71348df9 (patch) | |
| tree | bfde4972394d741196bcd1cf173bfda4639123a7 /net/ipv4/tcp_input.c | |
| parent | pinctrl/rockchip: add rk3588 support (diff) | |
| parent | Linux 5.18-rc5 (diff) | |
| download | linux-rng-f930b69a8944ab3f018e2a175ddbd16e71348df9.tar.xz linux-rng-f930b69a8944ab3f018e2a175ddbd16e71348df9.zip | |
Merge tag 'v5.18-rc5' into devel
Merge in Linux 5.18-rc5 since new code to the STM32 driver
depend in a non-trivial way on the fixes merged in -rc5.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 2088f93fa37b..60f99e9fb6d1 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -3867,7 +3867,8 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) tcp_process_tlp_ack(sk, ack, flag); if (tcp_ack_is_dubious(sk, flag)) { - if (!(flag & (FLAG_SND_UNA_ADVANCED | FLAG_NOT_DUP))) { + if (!(flag & (FLAG_SND_UNA_ADVANCED | + FLAG_NOT_DUP | FLAG_DSACKING_ACK))) { num_dupack = 1; /* Consider if pure acks were aggregated in tcp_add_backlog() */ if (!(flag & FLAG_DATA)) @@ -5454,7 +5455,17 @@ static void tcp_new_space(struct sock *sk) INDIRECT_CALL_1(sk->sk_write_space, sk_stream_write_space, sk); } -static void tcp_check_space(struct sock *sk) +/* Caller made space either from: + * 1) Freeing skbs in rtx queues (after tp->snd_una has advanced) + * 2) Sent skbs from output queue (and thus advancing tp->snd_nxt) + * + * We might be able to generate EPOLLOUT to the application if: + * 1) Space consumed in output/rtx queues is below sk->sk_sndbuf/2 + * 2) notsent amount (tp->write_seq - tp->snd_nxt) became + * small enough that tcp_stream_memory_free() decides it + * is time to generate EPOLLOUT. + */ +void tcp_check_space(struct sock *sk) { /* pairs with tcp_poll() */ smp_mb(); |