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>

2 files changed, 2 insertions, 18 deletions

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 71168a6f3347..0c9691305298 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -74,22 +74,7 @@ static inline struct vlan_ethhdr *vlan_eth_hdr(const struct sk_buff *skb)
 /* found in socket.c */
 extern void vlan_ioctl_set(int (*hook)(struct net *, void __user *));
 
-/* 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 {
-        struct net_device       *real_dev; /* The ethernet(like) device
-                                            * the vlan is attached to.
-                                            */
-        unsigned int            nr_vlans;
-        struct hlist_node       hlist;  /* linked list */
-        struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS];
-        struct rcu_head         rcu;
-};
+struct vlan_info;
 
 static inline int is_vlan_dev(struct net_device *dev)
 {
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index f7bff9615728..603730804da5 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -55,7 +55,6 @@
 
 #include <linux/netdev_features.h>
 
-struct vlan_group;
 struct netpoll_info;
 struct phy_device;
 /* 802.11 specific */
@@ -1096,7 +1095,7 @@ struct net_device {
         /* Protocol specific pointers */
 
 #if IS_ENABLED(CONFIG_VLAN_8021Q)
-        struct vlan_group __rcu *vlgrp;         /* VLAN group */
+        struct vlan_info __rcu  *vlan_info;     /* VLAN info */
 #endif
 #if IS_ENABLED(CONFIG_NET_DSA)
         struct dsa_switch_tree  *dsa_ptr;       /* dsa specific data */