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tcp: factorize logic into tcp_epollin_ready()

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Both tcp_data_ready() and tcp_stream_is_readable() share the same logic.

Add tcp_epollin_ready() helper to avoid duplication.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Arjun Roy <arjunroy@google.com>
Cc: Wei Wang <weiwan@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2021-02-12 15:22:14 -08:00
committed by David S. Miller
parent f969dc5a88
commit 05dc72aba3
3 changed files with 18 additions and 21 deletions
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11
net/ipv4/tcp_input.c
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@@ -4924,15 +4924,8 @@ err:
void tcp_data_ready(struct sock *sk)
{
const struct tcp_sock *tp = tcp_sk(sk);
int avail = tp->rcv_nxt - tp->copied_seq;
if (avail < sk->sk_rcvlowat && !tcp_rmem_pressure(sk) &&
!sock_flag(sk, SOCK_DONE) &&
tcp_receive_window(tp) > inet_csk(sk)->icsk_ack.rcv_mss)
return;
sk->sk_data_ready(sk);
if (tcp_epollin_ready(sk, sk->sk_rcvlowat))
sk->sk_data_ready(sk);
}
static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)