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net: ptp: do not reimplement PTP/BPF classifier

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There are currently pch_gbe, cpts, and ixp4xx_eth drivers that open-code
and reimplement a BPF classifier for the PTP protocol. Since all of them
effectively do the very same thing and load the very same PTP/BPF filter,
we can just consolidate that code by introducing ptp_classify_raw() in
the time-stamping core framework which can be used in drivers.

As drivers get initialized after bootstrapping the core networking
subsystem, they can make use of ptp_insns wrapped through
ptp_classify_raw(), which allows to simplify and remove PTP classifier
setup code in drivers.

Joint work with Alexei Starovoitov.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Richard Cochran <richard.cochran@omicron.at>
Cc: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann
2014-03-28 18:58:22 +01:00
committed by David S. Miller
parent e62d2df084
commit 164d8c6665
5 changed files with 12 additions and 38 deletions
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8
net/core/timestamping.c
View File

@@ -25,11 +25,17 @@
static struct sk_filter *ptp_insns __read_mostly;
unsigned int ptp_classify_raw(const struct sk_buff *skb)
{
return SK_RUN_FILTER(ptp_insns, skb);
}
EXPORT_SYMBOL_GPL(ptp_classify_raw);
static unsigned int classify(const struct sk_buff *skb)
{
if (likely(skb->dev && skb->dev->phydev &&
skb->dev->phydev->drv))
return SK_RUN_FILTER(ptp_insns, skb);
return ptp_classify_raw(skb);
else
return PTP_CLASS_NONE;
}