From 2e31396fa14be50a98c5d2b00416ebd74d381c1f Mon Sep 17 00:00:00 2001 From: Willem de Bruijn Date: Tue, 23 Apr 2013 00:39:28 +0000 Subject: 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 Signed-off-by: Willem de Bruijn Signed-off-by: David S. Miller --- net/core/skbuff.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'net/core') 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; -- cgit v1.2.3