diff options
Diffstat (limited to 'include/linux/if_vlan.h')
| -rw-r--r-- | include/linux/if_vlan.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 494cce866564..4047781da727 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -16,6 +16,7 @@ #ifdef __KERNEL__ #include <linux/netdevice.h> #include <linux/etherdevice.h> +#include <linux/rtnetlink.h> #define VLAN_HLEN 4 /* The additional bytes (on top of the Ethernet header) * that VLAN requires. @@ -114,6 +115,18 @@ static inline void vlan_group_set_device(struct vlan_group *vg, #define vlan_tx_tag_get(__skb) ((__skb)->vlan_tci & ~VLAN_TAG_PRESENT) #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) +/* Must be invoked with rcu_read_lock or with RTNL. */ +static inline struct net_device *vlan_find_dev(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); + + return NULL; +} + extern struct net_device *vlan_dev_real_dev(const struct net_device *dev); extern u16 vlan_dev_vlan_id(const struct net_device *dev); @@ -128,6 +141,12 @@ vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp, unsigned int vlan_tci); #else +static inline struct net_device *vlan_find_dev(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(); |