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net/tcp: don't peek at tail for io_uring zc

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Move tcp_write_queue_tail() to SOCK_ZEROCOPY specific flag as zerocopy
setup for msghdr->ubuf_info doesn't need to peek into the last request.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Begunkov 2023-05-15 17:06:36 +01:00 committed by David S. Miller
parent 833e24aeb4
commit eea96a3e2c
1 changed files with 1 additions and 2 deletions
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3
net/ipv4/tcp.c
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@ -1229,13 +1229,12 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size)
flags = msg->msg_flags;
if ((flags & MSG_ZEROCOPY) && size) {
skb = tcp_write_queue_tail(sk);
if (msg->msg_ubuf) {
uarg = msg->msg_ubuf;
net_zcopy_get(uarg);
zc = sk->sk_route_caps & NETIF_F_SG;
} else if (sock_flag(sk, SOCK_ZEROCOPY)) {
skb = tcp_write_queue_tail(sk);
uarg = msg_zerocopy_realloc(sk, size, skb_zcopy(skb));
if (!uarg) {
err = -ENOBUFS;