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Message-ID: <20091127220717.14078.6058.stgit@mimic.site>
Date: Fri, 27 Nov 2009 17:12:52 -0500
From: Patrick Mullaney <pmullaney@...ell.com>
To: netdev@...r.kernel.org
Cc: kaber@...sh.net, arnd@...db.de, linux-kernel@...r.kernel.org,
alacrityvm-devel@...ts.sourceforge.net
Subject: [PATCH v2] netdevice: provide common routine for macvlan and vlan
operstate management
Applies to net-2.6.git/master:0135ae0b9)
Provide common routine for the transition of operational state for a leaf
device during a root device transition. This updates a previous patch in
my venet macvlan series and fixes the problems that Arnd pointed out.
Is submitting this applied to net-next a more better approach?
Signed-off-by: Patrick Mullaney <pmullaney@...ell.com>
---
drivers/net/macvlan.c | 24 +++---------------------
include/linux/netdevice.h | 3 +++
net/8021q/vlan.c | 29 ++++-------------------------
net/core/dev.c | 27 +++++++++++++++++++++++++++
4 files changed, 37 insertions(+), 46 deletions(-)
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 2490aa3..14f63ec 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -456,25 +456,6 @@ static void macvlan_port_destroy(struct net_device *dev)
kfree(port);
}
-static void macvlan_transfer_operstate(struct net_device *dev)
-{
- struct macvlan_dev *vlan = netdev_priv(dev);
- const struct net_device *lowerdev = vlan->lowerdev;
-
- if (lowerdev->operstate == IF_OPER_DORMANT)
- netif_dormant_on(dev);
- else
- netif_dormant_off(dev);
-
- if (netif_carrier_ok(lowerdev)) {
- if (!netif_carrier_ok(dev))
- netif_carrier_on(dev);
- } else {
- if (netif_carrier_ok(dev))
- netif_carrier_off(dev);
- }
-}
-
static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
{
if (tb[IFLA_ADDRESS]) {
@@ -552,7 +533,7 @@ static int macvlan_newlink(struct net_device *dev,
return err;
list_add_tail(&vlan->list, &port->vlans);
- macvlan_transfer_operstate(dev);
+ netif_stacked_transfer_operstate(lowerdev, dev);
return 0;
}
@@ -592,7 +573,8 @@ static int macvlan_device_event(struct notifier_block *unused,
switch (event) {
case NETDEV_CHANGE:
list_for_each_entry(vlan, &port->vlans, list)
- macvlan_transfer_operstate(vlan->dev);
+ netif_stacked_transfer_operstate(vlan->lowerdev,
+ vlan->dev);
break;
case NETDEV_FEAT_CHANGE:
list_for_each_entry(vlan, &port->vlans, list) {
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 812a5f3..1587715 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1914,6 +1914,9 @@ unsigned long netdev_increment_features(unsigned long all, unsigned long one,
unsigned long mask);
unsigned long netdev_fix_features(unsigned long features, const char *name);
+void netif_stacked_transfer_operstate(const struct net_device *rootdev,
+ struct net_device *dev);
+
static inline int net_gso_ok(int features, int gso_type)
{
int feature = gso_type << NETIF_F_GSO_SHIFT;
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index a29c5ab..44f5751 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -183,27 +183,6 @@ void unregister_vlan_dev(struct net_device *dev)
dev_put(real_dev);
}
-static void vlan_transfer_operstate(const struct net_device *dev,
- struct net_device *vlandev)
-{
- /* Have to respect userspace enforced dormant state
- * of real device, also must allow supplicant running
- * on VLAN device
- */
- if (dev->operstate == IF_OPER_DORMANT)
- netif_dormant_on(vlandev);
- else
- netif_dormant_off(vlandev);
-
- if (netif_carrier_ok(dev)) {
- if (!netif_carrier_ok(vlandev))
- netif_carrier_on(vlandev);
- } else {
- if (netif_carrier_ok(vlandev))
- netif_carrier_off(vlandev);
- }
-}
-
int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id)
{
const char *name = real_dev->name;
@@ -261,7 +240,7 @@ int register_vlan_dev(struct net_device *dev)
/* Account for reference in struct vlan_dev_info */
dev_hold(real_dev);
- vlan_transfer_operstate(real_dev, dev);
+ netif_stacked_transfer_operstate(real_dev, dev);
linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
/* So, got the sucker initialized, now lets place
@@ -450,7 +429,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
if (!vlandev)
continue;
- vlan_transfer_operstate(dev, vlandev);
+ netif_stacked_transfer_operstate(dev, vlandev);
}
break;
@@ -506,7 +485,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
continue;
dev_change_flags(vlandev, flgs & ~IFF_UP);
- vlan_transfer_operstate(dev, vlandev);
+ netif_stacked_transfer_operstate(dev, vlandev);
}
break;
@@ -522,7 +501,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
continue;
dev_change_flags(vlandev, flgs | IFF_UP);
- vlan_transfer_operstate(dev, vlandev);
+ netif_stacked_transfer_operstate(dev, vlandev);
}
break;
diff --git a/net/core/dev.c b/net/core/dev.c
index fe10551..8ece671 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4747,6 +4747,33 @@ unsigned long netdev_fix_features(unsigned long features, const char *name)
EXPORT_SYMBOL(netdev_fix_features);
/**
+ * netif_stacked_transfer_operstate - transfer operstate
+ * @rootdev: the root or lower level device to transfer state from
+ * @dev: the device to transfer operstate to
+ *
+ * Transfer operational state from root to device. This is normally
+ * called when a stacking relationship exists between the root
+ * device and the device(a leaf device).
+ */
+void netif_stacked_transfer_operstate(const struct net_device *rootdev,
+ struct net_device *dev)
+{
+ if (rootdev->operstate == IF_OPER_DORMANT)
+ netif_dormant_on(dev);
+ else
+ netif_dormant_off(dev);
+
+ if (netif_carrier_ok(rootdev)) {
+ if (!netif_carrier_ok(dev))
+ netif_carrier_on(dev);
+ } else {
+ if (netif_carrier_ok(dev))
+ netif_carrier_off(dev);
+ }
+}
+EXPORT_SYMBOL(netif_stacked_transfer_operstate);
+
+/**
* register_netdevice - register a network device
* @dev: device to register
*
--
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