From 64a146513f8f12ba204b7bf5cb7e9505594ead42 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@sunset.davemloft.net>
Date: Tue, 6 Mar 2007 11:21:05 -0800
Subject: [PATCH] [NET]: Revert incorrect accept queue backlog changes.
This reverts two changes:
8488df894d05d6fa41c2bd298c335f944bb0e401
248f06726e866942b3d8ca8f411f9067713b7ff8
A backlog value of N really does mean allow "N + 1" connections
to queue to a listening socket. This allows one to specify
"0" as the backlog and still get 1 connection.
Noticed by Gerrit Renker and Rick Jones.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/net/sock.h | 2 +-
net/unix/af_unix.c | 6 +++---
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/include/net/sock.h b/include/net/sock.h
index 849c7df23181f..2c7d60ca35485 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -426,7 +426,7 @@ static inline void sk_acceptq_added(struct sock *sk)
static inline int sk_acceptq_is_full(struct sock *sk)
{
- return sk->sk_ack_backlog >= sk->sk_max_ack_backlog;
+ return sk->sk_ack_backlog > sk->sk_max_ack_backlog;
}
/*
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 51ca4383c388d..606971645b33e 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -934,7 +934,7 @@ static long unix_wait_for_peer(struct sock *other, long timeo)
sched = !sock_flag(other, SOCK_DEAD) &&
!(other->sk_shutdown & RCV_SHUTDOWN) &&
- (skb_queue_len(&other->sk_receive_queue) >=
+ (skb_queue_len(&other->sk_receive_queue) >
other->sk_max_ack_backlog);
unix_state_runlock(other);
@@ -1008,7 +1008,7 @@ static int unix_stream_connect(struct socket *sock, struct sockaddr *uaddr,
if (other->sk_state != TCP_LISTEN)
goto out_unlock;
- if (skb_queue_len(&other->sk_receive_queue) >=
+ if (skb_queue_len(&other->sk_receive_queue) >
other->sk_max_ack_backlog) {
err = -EAGAIN;
if (!timeo)
@@ -1381,7 +1381,7 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
}
if (unix_peer(other) != sk &&
- (skb_queue_len(&other->sk_receive_queue) >=
+ (skb_queue_len(&other->sk_receive_queue) >
other->sk_max_ack_backlog)) {
if (!timeo) {
err = -EAGAIN;
--
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