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| author | Cong Wang <cong.wang@bytedance.com> | 2022-08-17 12:54:44 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-08-18 11:04:56 -0700 |
| commit | a8688821f3854f37fe0198b8945f9cfc051ab2cf (patch) | |
| tree | 3e166b8c8d792283d7f4ce6bbc2354591387f5d8 /net | |
| parent | c457985aaa92e1fda2ce837cabf90bf687b92dcb (diff) | |
| download | linux-stable-a8688821f3854f37fe0198b8945f9cfc051ab2cf.tar.gz linux-stable-a8688821f3854f37fe0198b8945f9cfc051ab2cf.tar.bz2 linux-stable-a8688821f3854f37fe0198b8945f9cfc051ab2cf.zip | |
tcp: refactor tcp_read_skb() a bit
As tcp_read_skb() only reads one skb at a time, the while loop is
unnecessary, we can turn it into an if. This also simplifies the
code logic.
Cc: Eric Dumazet <edumazet@google.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp.c | 26 |
1 files changed, 9 insertions, 17 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 181a0d350123..56a554b49caa 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1761,25 +1761,17 @@ int tcp_read_skb(struct sock *sk, skb_read_actor_t recv_actor) if (sk->sk_state == TCP_LISTEN) return -ENOTCONN; - while ((skb = tcp_recv_skb(sk, seq, &offset)) != NULL) { - int used; - - __skb_unlink(skb, &sk->sk_receive_queue); - WARN_ON(!skb_set_owner_sk_safe(skb, sk)); - used = recv_actor(sk, skb); - if (used <= 0) { - if (!copied) - copied = used; - break; - } - seq += used; - copied += used; + skb = tcp_recv_skb(sk, seq, &offset); + if (!skb) + return 0; - if (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN) { + __skb_unlink(skb, &sk->sk_receive_queue); + WARN_ON(!skb_set_owner_sk_safe(skb, sk)); + copied = recv_actor(sk, skb); + if (copied > 0) { + seq += copied; + if (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN) ++seq; - break; - } - break; } consume_skb(skb); WRITE_ONCE(tp->copied_seq, seq); |