diff options
| author | Jiri Pirko <jpirko@redhat.com> | 2011-12-08 04:11:18 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-12-08 19:52:42 -0500 |
| commit | 5b9ea6e022e9ba0fe39cb349ac40361f78d5da5b (patch) | |
| tree | 11f0de492ee799fd4174f79ac6aae4c3533beb25 /net/8021q/vlan.h | |
| parent | 87002b03baabd2b8f6281ab6411ed88d24958de1 (diff) | |
| download | linux-5b9ea6e022e9ba0fe39cb349ac40361f78d5da5b.tar.bz2 | |
vlan: introduce vid list with reference counting
This allows to keep track of vids needed to be in rx vlan filters of
devices even if they are used in bond/team etc.
vlan_info as well as vlan_group previously was, is allocated when first
vid is added and dealocated whan last vid is deleted.
vlan_group definition is moved to private header.
Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/8021q/vlan.h')
| -rw-r--r-- | net/8021q/vlan.h | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h index d3c4ea4a3836..28d8dc20cb6d 100644 --- a/net/8021q/vlan.h +++ b/net/8021q/vlan.h @@ -3,6 +3,7 @@ #include <linux/if_vlan.h> #include <linux/u64_stats_sync.h> +#include <linux/list.h> /** @@ -74,6 +75,29 @@ static inline struct vlan_dev_priv *vlan_dev_priv(const struct net_device *dev) return netdev_priv(dev); } +/* if this changes, algorithm will have to be reworked because this + * depends on completely exhausting the VLAN identifier space. Thus + * it gives constant time look-up, but in many cases it wastes memory. + */ +#define VLAN_GROUP_ARRAY_SPLIT_PARTS 8 +#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS) + +struct vlan_group { + unsigned int nr_vlan_devs; + struct hlist_node hlist; /* linked list */ + struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS]; +}; + +struct vlan_info { + struct net_device *real_dev; /* The ethernet(like) device + * the vlan is attached to. + */ + struct vlan_group grp; + struct list_head vid_list; + unsigned int nr_vids; + struct rcu_head rcu; +}; + static inline struct net_device *vlan_group_get_device(struct vlan_group *vg, u16 vlan_id) { @@ -97,10 +121,10 @@ static inline void vlan_group_set_device(struct vlan_group *vg, 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); + struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info); - if (grp) - return vlan_group_get_device(grp, vlan_id); + if (vlan_info) + return vlan_group_get_device(&vlan_info->grp, vlan_id); return NULL; } |