295 lines
6.9 KiB
C
295 lines
6.9 KiB
C
/*
|
|
* Bridge per vlan tunnel port dst_metadata netlink control interface
|
|
*
|
|
* Authors:
|
|
* Roopa Prabhu <roopa@cumulusnetworks.com>
|
|
*
|
|
* 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 <net/dst_metadata.h>
|
|
|
|
#include "br_private.h"
|
|
#include "br_private_tunnel.h"
|
|
|
|
static size_t __get_vlan_tinfo_size(void)
|
|
{
|
|
return nla_total_size(0) + /* nest IFLA_BRIDGE_VLAN_TUNNEL_INFO */
|
|
nla_total_size(sizeof(u32)) + /* IFLA_BRIDGE_VLAN_TUNNEL_ID */
|
|
nla_total_size(sizeof(u16)) + /* IFLA_BRIDGE_VLAN_TUNNEL_VID */
|
|
nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_VLAN_TUNNEL_FLAGS */
|
|
}
|
|
|
|
static bool vlan_tunid_inrange(struct net_bridge_vlan *v_curr,
|
|
struct net_bridge_vlan *v_last)
|
|
{
|
|
__be32 tunid_curr = tunnel_id_to_key32(v_curr->tinfo.tunnel_id);
|
|
__be32 tunid_last = tunnel_id_to_key32(v_last->tinfo.tunnel_id);
|
|
|
|
return (be32_to_cpu(tunid_curr) - be32_to_cpu(tunid_last)) == 1;
|
|
}
|
|
|
|
static int __get_num_vlan_tunnel_infos(struct net_bridge_vlan_group *vg)
|
|
{
|
|
struct net_bridge_vlan *v, *vtbegin = NULL, *vtend = NULL;
|
|
int num_tinfos = 0;
|
|
|
|
/* Count number of vlan infos */
|
|
list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
|
|
/* only a context, bridge vlan not activated */
|
|
if (!br_vlan_should_use(v) || !v->tinfo.tunnel_id)
|
|
continue;
|
|
|
|
if (!vtbegin) {
|
|
goto initvars;
|
|
} else if ((v->vid - vtend->vid) == 1 &&
|
|
vlan_tunid_inrange(v, vtend)) {
|
|
vtend = v;
|
|
continue;
|
|
} else {
|
|
if ((vtend->vid - vtbegin->vid) > 0)
|
|
num_tinfos += 2;
|
|
else
|
|
num_tinfos += 1;
|
|
}
|
|
initvars:
|
|
vtbegin = v;
|
|
vtend = v;
|
|
}
|
|
|
|
if (vtbegin && vtend) {
|
|
if ((vtend->vid - vtbegin->vid) > 0)
|
|
num_tinfos += 2;
|
|
else
|
|
num_tinfos += 1;
|
|
}
|
|
|
|
return num_tinfos;
|
|
}
|
|
|
|
int br_get_vlan_tunnel_info_size(struct net_bridge_vlan_group *vg)
|
|
{
|
|
int num_tinfos;
|
|
|
|
if (!vg)
|
|
return 0;
|
|
|
|
rcu_read_lock();
|
|
num_tinfos = __get_num_vlan_tunnel_infos(vg);
|
|
rcu_read_unlock();
|
|
|
|
return num_tinfos * __get_vlan_tinfo_size();
|
|
}
|
|
|
|
static int br_fill_vlan_tinfo(struct sk_buff *skb, u16 vid,
|
|
__be64 tunnel_id, u16 flags)
|
|
{
|
|
__be32 tid = tunnel_id_to_key32(tunnel_id);
|
|
struct nlattr *tmap;
|
|
|
|
tmap = nla_nest_start(skb, IFLA_BRIDGE_VLAN_TUNNEL_INFO);
|
|
if (!tmap)
|
|
return -EMSGSIZE;
|
|
if (nla_put_u32(skb, IFLA_BRIDGE_VLAN_TUNNEL_ID,
|
|
be32_to_cpu(tid)))
|
|
goto nla_put_failure;
|
|
if (nla_put_u16(skb, IFLA_BRIDGE_VLAN_TUNNEL_VID,
|
|
vid))
|
|
goto nla_put_failure;
|
|
if (nla_put_u16(skb, IFLA_BRIDGE_VLAN_TUNNEL_FLAGS,
|
|
flags))
|
|
goto nla_put_failure;
|
|
nla_nest_end(skb, tmap);
|
|
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
nla_nest_cancel(skb, tmap);
|
|
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int br_fill_vlan_tinfo_range(struct sk_buff *skb,
|
|
struct net_bridge_vlan *vtbegin,
|
|
struct net_bridge_vlan *vtend)
|
|
{
|
|
int err;
|
|
|
|
if (vtend && (vtend->vid - vtbegin->vid) > 0) {
|
|
/* add range to skb */
|
|
err = br_fill_vlan_tinfo(skb, vtbegin->vid,
|
|
vtbegin->tinfo.tunnel_id,
|
|
BRIDGE_VLAN_INFO_RANGE_BEGIN);
|
|
if (err)
|
|
return err;
|
|
|
|
err = br_fill_vlan_tinfo(skb, vtend->vid,
|
|
vtend->tinfo.tunnel_id,
|
|
BRIDGE_VLAN_INFO_RANGE_END);
|
|
if (err)
|
|
return err;
|
|
} else {
|
|
err = br_fill_vlan_tinfo(skb, vtbegin->vid,
|
|
vtbegin->tinfo.tunnel_id,
|
|
0);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_fill_vlan_tunnel_info(struct sk_buff *skb,
|
|
struct net_bridge_vlan_group *vg)
|
|
{
|
|
struct net_bridge_vlan *vtbegin = NULL;
|
|
struct net_bridge_vlan *vtend = NULL;
|
|
struct net_bridge_vlan *v;
|
|
int err;
|
|
|
|
/* Count number of vlan infos */
|
|
list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
|
|
/* only a context, bridge vlan not activated */
|
|
if (!br_vlan_should_use(v))
|
|
continue;
|
|
|
|
if (!v->tinfo.tunnel_dst)
|
|
continue;
|
|
|
|
if (!vtbegin) {
|
|
goto initvars;
|
|
} else if ((v->vid - vtend->vid) == 1 &&
|
|
vlan_tunid_inrange(v, vtend)) {
|
|
vtend = v;
|
|
continue;
|
|
} else {
|
|
err = br_fill_vlan_tinfo_range(skb, vtbegin, vtend);
|
|
if (err)
|
|
return err;
|
|
}
|
|
initvars:
|
|
vtbegin = v;
|
|
vtend = v;
|
|
}
|
|
|
|
if (vtbegin) {
|
|
err = br_fill_vlan_tinfo_range(skb, vtbegin, vtend);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct nla_policy vlan_tunnel_policy[IFLA_BRIDGE_VLAN_TUNNEL_MAX + 1] = {
|
|
[IFLA_BRIDGE_VLAN_TUNNEL_ID] = { .type = NLA_U32 },
|
|
[IFLA_BRIDGE_VLAN_TUNNEL_VID] = { .type = NLA_U16 },
|
|
[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS] = { .type = NLA_U16 },
|
|
};
|
|
|
|
static int br_vlan_tunnel_info(struct net_bridge_port *p, int cmd,
|
|
u16 vid, u32 tun_id)
|
|
{
|
|
int err = 0;
|
|
|
|
if (!p)
|
|
return -EINVAL;
|
|
|
|
switch (cmd) {
|
|
case RTM_SETLINK:
|
|
err = nbp_vlan_tunnel_info_add(p, vid, tun_id);
|
|
break;
|
|
case RTM_DELLINK:
|
|
nbp_vlan_tunnel_info_delete(p, vid);
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int br_parse_vlan_tunnel_info(struct nlattr *attr,
|
|
struct vtunnel_info *tinfo)
|
|
{
|
|
struct nlattr *tb[IFLA_BRIDGE_VLAN_TUNNEL_MAX + 1];
|
|
u32 tun_id;
|
|
u16 vid, flags = 0;
|
|
int err;
|
|
|
|
memset(tinfo, 0, sizeof(*tinfo));
|
|
|
|
err = nla_parse_nested(tb, IFLA_BRIDGE_VLAN_TUNNEL_MAX, attr,
|
|
vlan_tunnel_policy, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (!tb[IFLA_BRIDGE_VLAN_TUNNEL_ID] ||
|
|
!tb[IFLA_BRIDGE_VLAN_TUNNEL_VID])
|
|
return -EINVAL;
|
|
|
|
tun_id = nla_get_u32(tb[IFLA_BRIDGE_VLAN_TUNNEL_ID]);
|
|
vid = nla_get_u16(tb[IFLA_BRIDGE_VLAN_TUNNEL_VID]);
|
|
if (vid >= VLAN_VID_MASK)
|
|
return -ERANGE;
|
|
|
|
if (tb[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS])
|
|
flags = nla_get_u16(tb[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS]);
|
|
|
|
tinfo->tunid = tun_id;
|
|
tinfo->vid = vid;
|
|
tinfo->flags = flags;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_process_vlan_tunnel_info(struct net_bridge *br,
|
|
struct net_bridge_port *p, int cmd,
|
|
struct vtunnel_info *tinfo_curr,
|
|
struct vtunnel_info *tinfo_last)
|
|
{
|
|
int err;
|
|
|
|
if (tinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
|
|
if (tinfo_last->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN)
|
|
return -EINVAL;
|
|
memcpy(tinfo_last, tinfo_curr, sizeof(struct vtunnel_info));
|
|
} else if (tinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END) {
|
|
int t, v;
|
|
|
|
if (!(tinfo_last->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN))
|
|
return -EINVAL;
|
|
if ((tinfo_curr->vid - tinfo_last->vid) !=
|
|
(tinfo_curr->tunid - tinfo_last->tunid))
|
|
return -EINVAL;
|
|
t = tinfo_last->tunid;
|
|
for (v = tinfo_last->vid; v <= tinfo_curr->vid; v++) {
|
|
err = br_vlan_tunnel_info(p, cmd, v, t);
|
|
if (err)
|
|
return err;
|
|
t++;
|
|
}
|
|
memset(tinfo_last, 0, sizeof(struct vtunnel_info));
|
|
memset(tinfo_curr, 0, sizeof(struct vtunnel_info));
|
|
} else {
|
|
if (tinfo_last->flags)
|
|
return -EINVAL;
|
|
err = br_vlan_tunnel_info(p, cmd, tinfo_curr->vid,
|
|
tinfo_curr->tunid);
|
|
if (err)
|
|
return err;
|
|
memset(tinfo_last, 0, sizeof(struct vtunnel_info));
|
|
memset(tinfo_curr, 0, sizeof(struct vtunnel_info));
|
|
}
|
|
|
|
return 0;
|
|
}
|