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bridge: add br_vlan_get_pvid_rcu()

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This new function allows you to fetch bridge pvid from packet path.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
This commit is contained in:
Pablo Neira Ayuso 2019-07-05 21:16:34 +08:00
parent 9d6a1ecdc9
commit 7582f5b70f
2 changed files with 21 additions and 4 deletions
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6
include/linux/if_bridge.h
View File

@ -88,6 +88,7 @@ static inline bool br_multicast_router(const struct net_device *dev)
#if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING)
bool br_vlan_enabled(const struct net_device *dev);
int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid);
int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid);
int br_vlan_get_info(const struct net_device *dev, u16 vid,
struct bridge_vlan_info *p_vinfo);
#else
@ -101,6 +102,11 @@ static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
return -EINVAL;
}
static inline int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
{
return -EINVAL;
}
static inline int br_vlan_get_info(const struct net_device *dev, u16 vid,
struct bridge_vlan_info *p_vinfo)
{

19
net/bridge/br_vlan.c
View File

@ -1227,13 +1227,11 @@ void br_vlan_get_stats(const struct net_bridge_vlan *v,
}
}
int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
static int __br_vlan_get_pvid(const struct net_device *dev,
struct net_bridge_port *p, u16 *p_pvid)
{
struct net_bridge_vlan_group *vg;
struct net_bridge_port *p;
ASSERT_RTNL();
p = br_port_get_check_rtnl(dev);
if (p)
vg = nbp_vlan_group(p);
else if (netif_is_bridge_master(dev))
@ -1244,8 +1242,21 @@ int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
*p_pvid = br_get_pvid(vg);
return 0;
}
int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
{
ASSERT_RTNL();
return __br_vlan_get_pvid(dev, br_port_get_check_rtnl(dev), p_pvid);
}
EXPORT_SYMBOL_GPL(br_vlan_get_pvid);
int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
{
return __br_vlan_get_pvid(dev, br_port_get_check_rcu(dev), p_pvid);
}
EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu);
int br_vlan_get_info(const struct net_device *dev, u16 vid,
struct bridge_vlan_info *p_vinfo)
{