netdev - [PATCH] Enable tx timestamping on loopback and dummy

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Date:   Sat, 11 Mar 2017 14:42:24 +0000
From:   Ezequiel Lara Gomez <ezegomez@...zon.com>
To:     netdev@...r.kernel.org
Subject: [PATCH] Enable tx timestamping on loopback and dummy

Also, cleanup some warnings from timestamping code.

This enables testing of SO_TIMESTAMPING options by targetting localhost
addresses.

Tested on qemu using txtimestamping.c from the kernel selftests.

Signed-off-by: Ezequiel Lara Gomez <ezegomez@...zon.com>
---
 drivers/net/dummy.c    |  1 +
 drivers/net/loopback.c | 14 +++++++-------
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/net/dummy.c b/drivers/net/dummy.c
index 2c80611..32fdc00 100644
--- a/drivers/net/dummy.c
+++ b/drivers/net/dummy.c
@@ -125,6 +125,7 @@ static netdev_tx_t dummy_xmit(struct sk_buff *skb, struct net_device *dev)
 	dstats->tx_bytes += skb->len;
 	u64_stats_update_end(&dstats->syncp);
 
+	skb_tx_timestamp(skb);
 	dev_kfree_skb(skb);
 	return NETDEV_TX_OK;
 }
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index b23b719..8bcf479 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -13,7 +13,7 @@
  *
  *		Alan Cox	:	Fixed oddments for NET3.014
  *		Alan Cox	:	Rejig for NET3.029 snap #3
- *		Alan Cox	: 	Fixed NET3.029 bugs and sped up
+ *		Alan Cox	:	Fixed NET3.029 bugs and sped up
  *		Larry McVoy	:	Tiny tweak to double performance
  *		Alan Cox	:	Backed out LMV's tweak - the linux mm
  *					can't take it...
@@ -41,7 +41,7 @@
 #include <linux/in.h>
 
 #include <linux/uaccess.h>
-#include <asm/io.h>
+#include <linux/io.h>
 
 #include <linux/inet.h>
 #include <linux/netdevice.h>
@@ -74,6 +74,7 @@ static netdev_tx_t loopback_xmit(struct sk_buff *skb,
 	struct pcpu_lstats *lb_stats;
 	int len;
 
+	skb_tx_timestamp(skb);
 	skb_orphan(skb);
 
 	/* Before queueing this packet to netif_rx(),
@@ -149,8 +150,8 @@ static void loopback_dev_free(struct net_device *dev)
 }
 
 static const struct net_device_ops loopback_ops = {
-	.ndo_init      = loopback_dev_init,
-	.ndo_start_xmit= loopback_xmit,
+	.ndo_init        = loopback_dev_init,
+	.ndo_start_xmit  = loopback_xmit,
 	.ndo_get_stats64 = loopback_get_stats64,
 	.ndo_set_mac_address = eth_mac_addr,
 };
@@ -170,7 +171,7 @@ static void loopback_setup(struct net_device *dev)
 	dev->priv_flags		|= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
 	netif_keep_dst(dev);
 	dev->hw_features	= NETIF_F_GSO_SOFTWARE;
-	dev->features 		= NETIF_F_SG | NETIF_F_FRAGLIST
+	dev->features		= NETIF_F_SG | NETIF_F_FRAGLIST
 		| NETIF_F_GSO_SOFTWARE
 		| NETIF_F_HW_CSUM
 		| NETIF_F_RXCSUM
@@ -206,7 +207,6 @@ static __net_init int loopback_net_init(struct net *net)
 	net->loopback_dev = dev;
 	return 0;
 
-
 out_free_netdev:
 	free_netdev(dev);
 out:
@@ -217,5 +217,5 @@ static __net_init int loopback_net_init(struct net *net)
 
 /* Registered in net/core/dev.c */
 struct pernet_operations __net_initdata loopback_net_ops = {
-       .init = loopback_net_init,
+	.init = loopback_net_init,
 };
-- 
1.9.1

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