/*
* Bridge netlink control interface
*
* Authors:
* Stephen Hemminger <shemminger@osdl.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/etherdevice.h>
#include <net/rtnetlink.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <uapi/linux/if_bridge.h>
#include "br_private.h"
#include "br_private_stp.h"
static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
u32 filter_mask)
{
struct net_bridge_vlan *v;
u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
u16 flags, pvid;
int num_vlans = 0;
if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
return 0;
pvid = br_get_pvid(vg);
/* Count number of vlan infos */
list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
flags = 0;
/* only a context, bridge vlan not activated */
if (!br_vlan_should_use(v))
continue;
if (v->vid == pvid)
flags |= BRIDGE_VLAN_INFO_PVID;
if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
flags |= BRIDGE_VLAN_INFO_UNTAGGED;
if (vid_range_start == 0) {
goto initvars;
} else if ((v->vid - vid_range_end) == 1 &&
flags == vid_range_flags) {
vid_range_end = v->vid;
continue;
} else {
if ((vid_range_end - vid_range_start) > 0)
num_vlans += 2;
else
num_vlans += 1;
}
initvars:
vid_range_start = v->vid;
vid_range_end = v->vid;
vid_range_flags = flags;
}
if (vid_range_start != 0) {
if ((vid_range_end - vid_range_start) > 0)
num_vlans += 2;
else
num_vlans += 1;
}
return num_vlans;
}
static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
u32 filter_mask)
{
int num_vlans;
if (!vg)
return 0;
if (filter_mask & RTEXT_FILTER_BRVLAN)
return vg->num_vlans;
rcu_read_lock();
num_vlans = __get_num_vlan_infos(vg, filter_mask);
rcu_read_unlock();
return num_vlans;
}
static size_t br_get_link_af_size_filtered(const struct net_device *dev,
u32 filter_mask)
{
struct net_bridge_vlan_group *vg = NULL;
struct net_bridge_port *p;
struct net_bridge *br;
int num_vlan_infos;
rcu_read_lock();
if (br_port_exists(dev))