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vlan: introduce __vlan_find_dev_deep()

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Since vlan_group_get_device and vlan_group is not going to be accessible
from device drivers, introduce function which substitutes it.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2011-07-20 04:54:05 +00:00 committed by David S. Miller
parent f605234066
commit cec9c13363
2 changed files with 29 additions and 0 deletions
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8
include/linux/if_vlan.h
View File

@ -120,6 +120,8 @@ static inline int is_vlan_dev(struct net_device *dev)
#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
extern struct net_device *__vlan_find_dev_deep(struct net_device *real_dev,
u16 vlan_id);
extern struct net_device *vlan_dev_real_dev(const struct net_device *dev);
extern u16 vlan_dev_vlan_id(const struct net_device *dev);
@ -135,6 +137,12 @@ vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci);
#else
static inline struct net_device *
__vlan_find_dev_deep(struct net_device *real_dev, u16 vlan_id)
{
return NULL;
}
static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev)
{
BUG();

21
net/8021q/vlan_core.c
View File

@ -63,6 +63,27 @@ bool vlan_do_receive(struct sk_buff **skbp)
return true;
}
/* Must be invoked with rcu_read_lock or with RTNL. */
struct net_device *__vlan_find_dev_deep(struct net_device *real_dev,
u16 vlan_id)
{
struct vlan_group *grp = rcu_dereference_rtnl(real_dev->vlgrp);
if (grp) {
return vlan_group_get_device(grp, vlan_id);
} else {
/*
* Bonding slaves do not have grp assigned to themselves.
* Grp is assigned to bonding master instead.
*/
if (netif_is_bond_slave(real_dev))
return __vlan_find_dev_deep(real_dev->master, vlan_id);
}
return NULL;
}
EXPORT_SYMBOL(__vlan_find_dev_deep);
struct net_device *vlan_dev_real_dev(const struct net_device *dev)
{
return vlan_dev_info(dev)->real_dev;