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authorWillem de Bruijn <willemb@google.com>2013-04-23 00:39:28 +0000
committerDavid S. Miller <davem@davemloft.net>2013-04-25 01:22:22 -0400
commit2e31396fa14be50a98c5d2b00416ebd74d381c1f (patch)
treee01cf0a24659116265e189a68331bd74ebb48d42 /net/core
parent92dea7c06656f709a3957aacef20574ce3dbe6fc (diff)
packet: tx timestamping on tpacket ring
When transmit timestamping is enabled at the socket level, record a timestamp on packets written to a PACKET_TX_RING. Tx timestamps are always looped to the application over the socket error queue. Software timestamps are also written back into the packet frame header in the packet ring. Reported-by: Paul Chavent <paul.chavent@onera.fr> Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/skbuff.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 898cf5c566f9..af9185d0be6a 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3327,12 +3327,8 @@ void skb_tstamp_tx(struct sk_buff *orig_skb,
if (!sk)
return;
- skb = skb_clone(orig_skb, GFP_ATOMIC);
- if (!skb)
- return;
-
if (hwtstamps) {
- *skb_hwtstamps(skb) =
+ *skb_hwtstamps(orig_skb) =
*hwtstamps;
} else {
/*
@@ -3340,9 +3336,13 @@ void skb_tstamp_tx(struct sk_buff *orig_skb,
* so keep the shared tx_flags and only
* store software time stamp
*/
- skb->tstamp = ktime_get_real();
+ orig_skb->tstamp = ktime_get_real();
}
+ skb = skb_clone(orig_skb, GFP_ATOMIC);
+ if (!skb)
+ return;
+
serr = SKB_EXT_ERR(skb);
memset(serr, 0, sizeof(*serr));
serr->ee.ee_errno = ENOMSG;