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tcp: Fix recvmsg MSG_PEEK influence of blocking behavior.

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Vito Caputo noticed that tcp_recvmsg() returns immediately from
partial reads when MSG_PEEK is used.  In particular, this means that
SO_RCVLOWAT is not respected.

Simply remove the test.  And this matches the behavior of several
other systems, including BSD.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-11-05 03:36:01 -08:00
parent efb9a8c28c
commit 518a09ef11
1 changed files with 1 additions and 2 deletions
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3
net/ipv4/tcp.c
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@ -1374,8 +1374,7 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
sk->sk_state == TCP_CLOSE ||
(sk->sk_shutdown & RCV_SHUTDOWN) ||
!timeo ||
signal_pending(current) ||
(flags & MSG_PEEK))
signal_pending(current))
break;
} else {
if (sock_flag(sk, SOCK_DONE))