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net: bridge: Publish bridge accessor functions

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Add a couple new functions to allow querying FDB and vlan settings of a
bridge.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2018-04-29 10:56:08 +03:00 committed by David S. Miller
parent 6df93462c2
commit 4d4fd36126
4 changed files with 100 additions and 0 deletions
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28
include/linux/if_bridge.h
View File

@ -93,11 +93,39 @@ 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_info(const struct net_device *dev, u16 vid,
struct bridge_vlan_info *p_vinfo);
#else
static inline bool br_vlan_enabled(const struct net_device *dev)
{
return false;
}
static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
{
return -1;
}
static inline int br_vlan_get_info(const struct net_device *dev, u16 vid,
struct bridge_vlan_info *p_vinfo)
{
return -1;
}
#endif
#if IS_ENABLED(CONFIG_BRIDGE)
struct net_device *br_fdb_find_port(const struct net_device *br_dev,
const unsigned char *addr,
__u16 vid);
#else
static inline struct net_device *
br_fdb_find_port(const struct net_device *br_dev,
const unsigned char *addr,
__u16 vid)
{
return NULL;
}
#endif
#endif

22
net/bridge/br_fdb.c
View File

@ -121,6 +121,28 @@ static struct net_bridge_fdb_entry *br_fdb_find(struct net_bridge *br,
return fdb;
}
struct net_device *br_fdb_find_port(const struct net_device *br_dev,
const unsigned char *addr,
__u16 vid)
{
struct net_bridge_fdb_entry *f;
struct net_device *dev = NULL;
struct net_bridge *br;
ASSERT_RTNL();
if (!netif_is_bridge_master(br_dev))
return NULL;
br = netdev_priv(br_dev);
f = br_fdb_find(br, addr, vid);
if (f && f->dst)
dev = f->dst->dev;
return dev;
}
EXPORT_SYMBOL_GPL(br_fdb_find_port);
struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
const unsigned char *addr,
__u16 vid)

11
net/bridge/br_private.h
View File

@ -594,11 +594,22 @@ static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
return rcu_dereference(dev->rx_handler) == br_handle_frame;
}
static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
{
return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
}
static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
{
return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
}
static inline struct net_bridge_port *
br_port_get_check_rtnl(const struct net_device *dev)
{
return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
}
/* br_ioctl.c */
int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,

39
net/bridge/br_vlan.c
View File

@ -1149,3 +1149,42 @@ void br_vlan_get_stats(const struct net_bridge_vlan *v,
stats->tx_packets += txpackets;
}
}
int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
{
struct net_bridge_vlan_group *vg;
ASSERT_RTNL();
if (netif_is_bridge_master(dev))
vg = br_vlan_group(netdev_priv(dev));
else
return -EINVAL;
*p_pvid = br_get_pvid(vg);
return 0;
}
EXPORT_SYMBOL_GPL(br_vlan_get_pvid);
int br_vlan_get_info(const struct net_device *dev, u16 vid,
struct bridge_vlan_info *p_vinfo)
{
struct net_bridge_vlan_group *vg;
struct net_bridge_vlan *v;
struct net_bridge_port *p;
ASSERT_RTNL();
p = br_port_get_check_rtnl(dev);
if (p)
vg = nbp_vlan_group(p);
else
return -EINVAL;
v = br_vlan_find(vg, vid);
if (!v)
return -ENOENT;
p_vinfo->vid = vid;
p_vinfo->flags = v->flags;
return 0;
}
EXPORT_SYMBOL_GPL(br_vlan_get_info);