adds busy-poll support for TCP.
Signed-off-by: Alexander Duyck <[email protected]>
Signed-off-by: Jesse Brandeburg <[email protected]>
Tested-by: Willem de Bruijn <[email protected]>
Signed-off-by: Eliezer Tamir <[email protected]>
---
net/ipv4/tcp.c | 5 +++++
net/ipv4/tcp_input.c | 1 +
net/ipv4/tcp_ipv4.c | 2 ++
3 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index d87ce72..652c75a 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -279,6 +279,7 @@
#include <asm/uaccess.h>
#include <asm/ioctls.h>
+#include <net/ll_poll.h>
int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT;
@@ -1551,6 +1552,10 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg,
struct sk_buff *skb;
u32 urg_hole = 0;
+ if (sk_valid_ll(sk) && skb_queue_empty(&sk->sk_receive_queue)
+ && (sk->sk_state == TCP_ESTABLISHED))
+ sk_poll_ll(sk, nonblock);
+
lock_sock(sk);
err = -ENOTCONN;
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 9579e1a..4d82939 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -74,6 +74,7 @@
#include <linux/ipsec.h>
#include <asm/unaligned.h>
#include <net/netdma.h>
+#include <net/ll_poll.h>
int sysctl_tcp_timestamps __read_mostly = 1;
int sysctl_tcp_window_scaling __read_mostly = 1;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index d20ede0..35fd8bc 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -75,6 +75,7 @@
#include <net/netdma.h>
#include <net/secure_seq.h>
#include <net/tcp_memcontrol.h>
+#include <net/ll_poll.h>
#include <linux/inet.h>
#include <linux/ipv6.h>
@@ -2011,6 +2012,7 @@ process:
if (sk_filter(sk, skb))
goto discard_and_relse;
+ sk_mark_ll(sk, skb);
skb->dev = NULL;
bh_lock_sock_nested(sk);
------------------------------------------------------------------------------
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