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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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11
drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
View File

@@ -120,10 +120,6 @@ static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
int data);
static void pch_gbe_set_multi(struct net_device *netdev);
static struct sock_filter ptp_filter[] = {
PTP_FILTER
};
static int pch_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid)
{
u8 *data = skb->data;
@@ -131,7 +127,7 @@ static int pch_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid)
u16 *hi, *id;
u32 lo;
if (sk_run_filter(skb, ptp_filter) == PTP_CLASS_NONE)
if (ptp_classify_raw(skb) == PTP_CLASS_NONE)
return 0;
offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
@@ -2635,11 +2631,6 @@ static int pch_gbe_probe(struct pci_dev *pdev,
adapter->ptp_pdev = pci_get_bus_and_slot(adapter->pdev->bus->number,
PCI_DEVFN(12, 4));
if (ptp_filter_init(ptp_filter, ARRAY_SIZE(ptp_filter))) {
dev_err(&pdev->dev, "Bad ptp filter\n");
ret = -EINVAL;
goto err_free_netdev;
}
netdev->netdev_ops = &pch_gbe_netdev_ops;
netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD;