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Date: Wed, 9 Mar 2016 12:42:48 -0500
From: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel@...oirfairelinux.com,
"David S. Miller" <davem@...emloft.net>,
Florian Fainelli <f.fainelli@...il.com>,
Andrew Lunn <andrew@...n.ch>,
Scott Feldman <sfeldma@...il.com>,
Jiri Pirko <jiri@...nulli.us>,
Ido Schimmel <idosch@...lanox.com>,
nikolay@...ulusnetworks.com, Elad Raz <eladr@...lanox.com>,
Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Subject: [RFC PATCH net-next 2/2] net: dsa: support SWITCHDEV_ATTR_ID_PORT_BRIDGE_IF
Add a new dsa_slave_bridge_if function to handle the
SWITCHDEV_ATTR_ID_PORT_BRIDGE_IF switchdev attribute.
Thus remove the code related to the netdev notifier block.
Signed-off-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
---
net/dsa/dsa.c | 7 ----
net/dsa/dsa_priv.h | 2 -
net/dsa/slave.c | 113 ++++++++++++++---------------------------------------
3 files changed, 30 insertions(+), 92 deletions(-)
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index fa4daba..cfb678b 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -977,10 +977,6 @@ static struct packet_type dsa_pack_type __read_mostly = {
.func = dsa_switch_rcv,
};
-static struct notifier_block dsa_netdevice_nb __read_mostly = {
- .notifier_call = dsa_slave_netdevice_event,
-};
-
#ifdef CONFIG_PM_SLEEP
static int dsa_suspend(struct device *d)
{
@@ -1047,8 +1043,6 @@ static int __init dsa_init_module(void)
{
int rc;
- register_netdevice_notifier(&dsa_netdevice_nb);
-
rc = platform_driver_register(&dsa_driver);
if (rc)
return rc;
@@ -1061,7 +1055,6 @@ module_init(dsa_init_module);
static void __exit dsa_cleanup_module(void)
{
- unregister_netdevice_notifier(&dsa_netdevice_nb);
dev_remove_pack(&dsa_pack_type);
platform_driver_unregister(&dsa_driver);
}
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index 1d1a546..34d1951 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -64,8 +64,6 @@ int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
void dsa_slave_destroy(struct net_device *slave_dev);
int dsa_slave_suspend(struct net_device *slave_dev);
int dsa_slave_resume(struct net_device *slave_dev);
-int dsa_slave_netdevice_event(struct notifier_block *unused,
- unsigned long event, void *ptr);
/* tag_dsa.c */
extern const struct dsa_device_ops dsa_netdev_ops;
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 27bf03d..90ef149 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -305,16 +305,38 @@ static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
return -EOPNOTSUPP;
}
-static int dsa_slave_stp_update(struct net_device *dev, u8 state)
+static int dsa_slave_bridge_if(struct net_device *dev,
+ const struct switchdev_attr *attr,
+ struct switchdev_trans *trans)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
- int ret = -EOPNOTSUPP;
+ int err;
- if (ds->drv->port_stp_update)
- ret = ds->drv->port_stp_update(ds, p->port, state);
+ if (switchdev_trans_ph_prepare(trans)) {
+ if (!ds->drv->port_join_bridge || !ds->drv->port_leave_bridge)
+ return -EOPNOTSUPP;
+ return 0;
+ }
- return ret;
+ if (attr->u.join) {
+ err = ds->drv->port_join_bridge(ds, p->port, attr->orig_dev);
+ if (!err)
+ p->bridge_dev = attr->orig_dev;
+ } else {
+ err = ds->drv->port_leave_bridge(ds, p->port);
+
+ /* When a port leaves a bridge, the bridge layer sets its STP
+ * state to DISABLED. Restore FORWARDING to keep it functional.
+ */
+ if (ds->drv->port_stp_update)
+ ds->drv->port_stp_update(ds, p->port,
+ BR_STATE_FORWARDING);
+
+ p->bridge_dev = NULL;
+ }
+
+ return err;
}
static int dsa_slave_vlan_filtering(struct net_device *dev,
@@ -354,6 +376,9 @@ static int dsa_slave_port_attr_set(struct net_device *dev,
case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
ret = dsa_slave_vlan_filtering(dev, attr, trans);
break;
+ case SWITCHDEV_ATTR_ID_PORT_BRIDGE_IF:
+ ret = dsa_slave_bridge_if(dev, attr, trans);
+ break;
default:
ret = -EOPNOTSUPP;
break;
@@ -439,41 +464,6 @@ static int dsa_slave_port_obj_dump(struct net_device *dev,
return err;
}
-static int dsa_slave_bridge_port_join(struct net_device *dev,
- struct net_device *br)
-{
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct dsa_switch *ds = p->parent;
- int ret = -EOPNOTSUPP;
-
- p->bridge_dev = br;
-
- if (ds->drv->port_join_bridge)
- ret = ds->drv->port_join_bridge(ds, p->port, br);
-
- return ret;
-}
-
-static int dsa_slave_bridge_port_leave(struct net_device *dev)
-{
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct dsa_switch *ds = p->parent;
- int ret = -EOPNOTSUPP;
-
-
- if (ds->drv->port_leave_bridge)
- ret = ds->drv->port_leave_bridge(ds, p->port);
-
- p->bridge_dev = NULL;
-
- /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
- * so allow it to be in BR_STATE_FORWARDING to be kept functional
- */
- dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
-
- return ret;
-}
-
static int dsa_slave_port_attr_get(struct net_device *dev,
struct switchdev_attr *attr)
{
@@ -1136,46 +1126,3 @@ void dsa_slave_destroy(struct net_device *slave_dev)
unregister_netdev(slave_dev);
free_netdev(slave_dev);
}
-
-static bool dsa_slave_dev_check(struct net_device *dev)
-{
- return dev->netdev_ops == &dsa_slave_netdev_ops;
-}
-
-static int dsa_slave_master_changed(struct net_device *dev)
-{
- struct net_device *master = netdev_master_upper_dev_get(dev);
- struct dsa_slave_priv *p = netdev_priv(dev);
- int err = 0;
-
- if (master && master->rtnl_link_ops &&
- !strcmp(master->rtnl_link_ops->kind, "bridge"))
- err = dsa_slave_bridge_port_join(dev, master);
- else if (dsa_port_is_bridged(p))
- err = dsa_slave_bridge_port_leave(dev);
-
- return err;
-}
-
-int dsa_slave_netdevice_event(struct notifier_block *unused,
- unsigned long event, void *ptr)
-{
- struct net_device *dev;
- int err = 0;
-
- switch (event) {
- case NETDEV_CHANGEUPPER:
- dev = netdev_notifier_info_to_dev(ptr);
- if (!dsa_slave_dev_check(dev))
- goto out;
-
- err = dsa_slave_master_changed(dev);
- if (err && err != -EOPNOTSUPP)
- netdev_warn(dev, "failed to reflect master change\n");
-
- break;
- }
-
-out:
- return NOTIFY_DONE;
-}
--
2.7.2
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