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authorWillem de Bruijn <willemb@google.com>2014-09-09 01:58:58 +0200
committerDavid S. Miller <davem@davemloft.net>2014-09-10 02:34:41 +0200
commit67cc0d4077951295f42bed63805e91b46c24477b (patch)
tree7a0170e8cd1d6bbef0e09869c5a7eda347d92424
parentnet_sched: sfq: remove unused macro (diff)
downloadlinux-67cc0d4077951295f42bed63805e91b46c24477b.tar.xz
linux-67cc0d4077951295f42bed63805e91b46c24477b.zip
net-timestamp: optimize sock_tx_timestamp default path
Few packets have timestamping enabled. Exit sock_tx_timestamp quickly in this common case. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/sock.h10
-rw-r--r--net/socket.c7
2 files changed, 11 insertions, 6 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index 049ab1b732a6..515a4d01e932 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2199,6 +2199,8 @@ static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
sk->sk_stamp = skb->tstamp;
}
+void __sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags);
+
/**
* sock_tx_timestamp - checks whether the outgoing packet is to be time stamped
* @sk: socket sending this packet
@@ -2206,7 +2208,13 @@ static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
*
* Note : callers should take care of initial *tx_flags value (usually 0)
*/
-void sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags);
+static inline void sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags)
+{
+ if (unlikely(sk->sk_tsflags))
+ __sock_tx_timestamp(sk, tx_flags);
+ if (unlikely(sock_flag(sk, SOCK_WIFI_STATUS)))
+ *tx_flags |= SKBTX_WIFI_STATUS;
+}
/**
* sk_eat_skb - Release a skb if it is no longer needed
diff --git a/net/socket.c b/net/socket.c
index 2e2586e2dee1..d40f522541aa 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -610,7 +610,7 @@ void sock_release(struct socket *sock)
}
EXPORT_SYMBOL(sock_release);
-void sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags)
+void __sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags)
{
u8 flags = *tx_flags;
@@ -626,12 +626,9 @@ void sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags)
if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK)
flags |= SKBTX_ACK_TSTAMP;
- if (sock_flag(sk, SOCK_WIFI_STATUS))
- flags |= SKBTX_WIFI_STATUS;
-
*tx_flags = flags;
}
-EXPORT_SYMBOL(sock_tx_timestamp);
+EXPORT_SYMBOL(__sock_tx_timestamp);
static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size)