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authorPavel Emelyanov <xemul@openvz.org>2008-04-02 00:08:01 -0700
committerDavid S. Miller <davem@davemloft.net>2008-04-02 00:08:01 -0700
commit802fb176d8c635ae42da31b80841c26e8c7338a0 (patch)
tree3f0a1283ca650868fd41942fb13e5ada129788c7 /net/8021q
parentf32c5f2c3866bf4d932d2bc42216dafb90a50ab7 (diff)
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[VLAN]: Proc entry is not renamed when vlan device name changes.
This may lead to situations, when each of two proc entries produce data for the other's device. Looks like a BUG, so this patch is for net-2.6. It will not apply to net-2.6.26 since dev->nd_net access is replaced with dev_net(dev) one. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/8021q')
-rw-r--r--net/8021q/vlan.c20
-rw-r--r--net/8021q/vlan.h5
-rw-r--r--net/8021q/vlanproc.c5
3 files changed, 24 insertions, 6 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index dbc81b9..b33410a 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -374,17 +374,35 @@ static void vlan_sync_address(struct net_device *dev,
memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
}
+static void __vlan_device_event(struct net_device *dev, unsigned long event)
+{
+ switch (event) {
+ case NETDEV_CHANGENAME:
+ vlan_proc_rem_dev(dev);
+ if (vlan_proc_add_dev(dev) < 0)
+ pr_warning("8021q: failed to change proc name for %s\n",
+ dev->name);
+ break;
+ }
+}
+
static int vlan_device_event(struct notifier_block *unused, unsigned long event,
void *ptr)
{
struct net_device *dev = ptr;
- struct vlan_group *grp = __vlan_find_group(dev->ifindex);
+ struct vlan_group *grp;
int i, flgs;
struct net_device *vlandev;
if (dev->nd_net != &init_net)
return NOTIFY_DONE;
+ if (is_vlan_dev(dev)) {
+ __vlan_device_event(dev, event);
+ goto out;
+ }
+
+ grp = __vlan_find_group(dev->ifindex);
if (!grp)
goto out;
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 73efcc7..51271ae 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -45,4 +45,9 @@ void vlan_netlink_fini(void);
extern struct rtnl_link_ops vlan_link_ops;
+static inline int is_vlan_dev(struct net_device *dev)
+{
+ return dev->priv_flags & IFF_802_1Q_VLAN;
+}
+
#endif /* !(__BEN_VLAN_802_1Q_INC__) */
diff --git a/net/8021q/vlanproc.c b/net/8021q/vlanproc.c
index 146cfb0..9671aa5 100644
--- a/net/8021q/vlanproc.c
+++ b/net/8021q/vlanproc.c
@@ -210,11 +210,6 @@ int vlan_proc_rem_dev(struct net_device *vlandev)
* The following few functions build the content of /proc/net/vlan/config
*/
-static inline int is_vlan_dev(struct net_device *dev)
-{
- return dev->priv_flags & IFF_802_1Q_VLAN;
-}
-
/* start read of /proc/net/vlan/config */
static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
__acquires(dev_base_lock)