[v3,maint] batman-adv: change the MAC of each VLAN upon ndo_set_mac_address
Commit Message
From: Antonio Quartulli <antonio@open-mesh.com>
The MAC address of the soft-interface is used to initialise
the "non-purge" TT entry of each existing VLAN. Therefore
when the user invokes ndo_set_mac_address() all the
"non-purge" TT entries have to be updated, not only the one
belonging to the non-tagged network.
Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
---
Changes from v2:
- don't increment/decrement vlan->refcounter because we never use the vlan
object outside of the rcu_read_lock/unlock area
changes from v1:
- declare vlan variable
soft-interface.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
Comments
On Monday 31 March 2014 13:48:10 Antonio Quartulli wrote:
> From: Antonio Quartulli <antonio@open-mesh.com>
>
> The MAC address of the soft-interface is used to initialise
> the "non-purge" TT entry of each existing VLAN. Therefore
> when the user invokes ndo_set_mac_address() all the
> "non-purge" TT entries have to be updated, not only the one
> belonging to the non-tagged network.
>
> Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
> ---
>
> Changes from v2:
> - don't increment/decrement vlan->refcounter because we never use the vlan
> object outside of the rcu_read_lock/unlock area
>
> changes from v1:
> - declare vlan variable
>
>
> soft-interface.c | 12 +++++++++---
> 1 file changed, 9 insertions(+), 3 deletions(-)
Applied in revision 31f3914.
Thanks,
Marek
@@ -105,6 +105,7 @@ static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
{
struct batadv_priv *bat_priv = netdev_priv(dev);
+ struct batadv_softif_vlan *vlan;
struct sockaddr *addr = p;
uint8_t old_addr[ETH_ALEN];
@@ -115,12 +116,17 @@ static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
/* only modify transtable if it has been initialized before */
- if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) {
- batadv_tt_local_remove(bat_priv, old_addr, BATADV_NO_FLAGS,
+ if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
+ return 0;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
+ batadv_tt_local_remove(bat_priv, old_addr, vlan->vid,
"mac address changed", false);
- batadv_tt_local_add(dev, addr->sa_data, BATADV_NO_FLAGS,
+ batadv_tt_local_add(dev, addr->sa_data, vlan->vid,
BATADV_NULL_IFINDEX, BATADV_NO_MARK);
}
+ rcu_read_unlock();
return 0;
}