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net: dsa: introduce bridge notifier

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A slave device will now notify the switch fabric once its port is
bridged or unbridged, instead of calling directly its switch operations.

This code allows propagating cross-chip bridging events in the fabric.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot
2017-02-03 13:20:21 -05:00
committed by David S. Miller
parent f515f192ab
commit 04d3a4c6af
3 changed files with 71 additions and 11 deletions
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32
net/dsa/switch.c
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@@ -13,6 +13,32 @@
#include <linux/notifier.h>
#include <net/dsa.h>
static int dsa_switch_bridge_join(struct dsa_switch *ds,
struct dsa_notifier_bridge_info *info)
{
if (ds->index == info->sw_index && ds->ops->port_bridge_join)
return ds->ops->port_bridge_join(ds, info->port, info->br);
if (ds->index != info->sw_index)
dev_dbg(ds->dev, "crosschip DSA port %d.%d bridged to %s\n",
info->sw_index, info->port, netdev_name(info->br));
return 0;
}
static int dsa_switch_bridge_leave(struct dsa_switch *ds,
struct dsa_notifier_bridge_info *info)
{
if (ds->index == info->sw_index && ds->ops->port_bridge_leave)
ds->ops->port_bridge_leave(ds, info->port, info->br);
if (ds->index != info->sw_index)
dev_dbg(ds->dev, "crosschip DSA port %d.%d unbridged from %s\n",
info->sw_index, info->port, netdev_name(info->br));
return 0;
}
static int dsa_switch_event(struct notifier_block *nb,
unsigned long event, void *info)
{
@@ -20,6 +46,12 @@ static int dsa_switch_event(struct notifier_block *nb,
int err;
switch (event) {
case DSA_NOTIFIER_BRIDGE_JOIN:
err = dsa_switch_bridge_join(ds, info);
break;
case DSA_NOTIFIER_BRIDGE_LEAVE:
err = dsa_switch_bridge_leave(ds, info);
break;
default:
err = -EOPNOTSUPP;
break;