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authorJiri Pirko <jpirko@redhat.com>2011-12-08 04:11:18 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-08 19:52:42 -0500
commit5b9ea6e022e9ba0fe39cb349ac40361f78d5da5b (patch)
tree11f0de492ee799fd4174f79ac6aae4c3533beb25 /net/8021q/vlan.h
parent87002b03baabd2b8f6281ab6411ed88d24958de1 (diff)
downloadlinux-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.h30
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;
}