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net-timestamp: Make the clone operation stand-alone from phy timestamping

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The phy timestamping takes a different path than the regular timestamping
does in that it will create a clone first so that the packets needing to be
timestamped can be placed in a queue, or the context block could be used.

In order to support these use cases I am pulling the core of the code out
so it can be used in other drivers beyond just phy devices.

In addition I have added a destructor named sock_efree which is meant to
provide a simple way for dropping the reference to skb exceptions that
aren't part of either the receive or send windows for the socket, and I
have removed some duplication in spots where this destructor could be used
in place of sock_edemux.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2014-09-04 13:31:35 -04:00 • committed by David S. Miller
parent 37846ef018
commit 62bccb8cdb
6 changed files with 40 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

14
net/core/timestamping.c
View file

@ -36,10 +36,9 @@ void skb_clone_tx_timestamp(struct sk_buff *skb)
{
struct phy_device *phydev;
struct sk_buff *clone;
struct sock *sk = skb->sk;
unsigned int type;
if (!sk)
if (!skb->sk)
return;
type = classify(skb);
@ -48,16 +47,9 @@ void skb_clone_tx_timestamp(struct sk_buff *skb)
phydev = skb->dev->phydev;
if (likely(phydev->drv->txtstamp)) {
if (!atomic_inc_not_zero(&sk->sk_refcnt))
clone = skb_clone_sk(skb);
if (!clone)
return;
clone = skb_clone(skb, GFP_ATOMIC);
if (!clone) {
sock_put(sk);
return;
}
clone->sk = sk;
phydev->drv->txtstamp(phydev, clone, type);
}
}