2 * Bridge per vlan tunnel port dst_metadata netlink control interface
5 * Roopa Prabhu <roopa@cumulusnetworks.com>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/etherdevice.h>
16 #include <net/rtnetlink.h>
17 #include <net/net_namespace.h>
19 #include <uapi/linux/if_bridge.h>
20 #include <net/dst_metadata.h>
22 #include "br_private.h"
23 #include "br_private_tunnel.h"
25 static size_t __get_vlan_tinfo_size(void)
27 return nla_total_size(0) + /* nest IFLA_BRIDGE_VLAN_TUNNEL_INFO */
28 nla_total_size(sizeof(u32)) + /* IFLA_BRIDGE_VLAN_TUNNEL_ID */
29 nla_total_size(sizeof(u16)) + /* IFLA_BRIDGE_VLAN_TUNNEL_VID */
30 nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_VLAN_TUNNEL_FLAGS */
33 static bool vlan_tunid_inrange(struct net_bridge_vlan *v_curr,
34 struct net_bridge_vlan *v_last)
36 __be32 tunid_curr = tunnel_id_to_key32(v_curr->tinfo.tunnel_id);
37 __be32 tunid_last = tunnel_id_to_key32(v_last->tinfo.tunnel_id);
39 return (be32_to_cpu(tunid_curr) - be32_to_cpu(tunid_last)) == 1;
42 static int __get_num_vlan_tunnel_infos(struct net_bridge_vlan_group *vg)
44 struct net_bridge_vlan *v, *vtbegin = NULL, *vtend = NULL;
47 /* Count number of vlan infos */
48 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
49 /* only a context, bridge vlan not activated */
50 if (!br_vlan_should_use(v) || !v->tinfo.tunnel_id)
55 } else if ((v->vid - vtend->vid) == 1 &&
56 vlan_tunid_inrange(v, vtend)) {
60 if ((vtend->vid - vtbegin->vid) > 0)
70 if (vtbegin && vtend) {
71 if ((vtend->vid - vtbegin->vid) > 0)
80 int br_get_vlan_tunnel_info_size(struct net_bridge_vlan_group *vg)
88 num_tinfos = __get_num_vlan_tunnel_infos(vg);
91 return num_tinfos * __get_vlan_tinfo_size();
94 static int br_fill_vlan_tinfo(struct sk_buff *skb, u16 vid,
95 __be64 tunnel_id, u16 flags)
97 __be32 tid = tunnel_id_to_key32(tunnel_id);
100 tmap = nla_nest_start(skb, IFLA_BRIDGE_VLAN_TUNNEL_INFO);
103 if (nla_put_u32(skb, IFLA_BRIDGE_VLAN_TUNNEL_ID,
105 goto nla_put_failure;
106 if (nla_put_u16(skb, IFLA_BRIDGE_VLAN_TUNNEL_VID,
108 goto nla_put_failure;
109 if (nla_put_u16(skb, IFLA_BRIDGE_VLAN_TUNNEL_FLAGS,
111 goto nla_put_failure;
112 nla_nest_end(skb, tmap);
117 nla_nest_cancel(skb, tmap);
122 static int br_fill_vlan_tinfo_range(struct sk_buff *skb,
123 struct net_bridge_vlan *vtbegin,
124 struct net_bridge_vlan *vtend)
128 if (vtend && (vtend->vid - vtbegin->vid) > 0) {
129 /* add range to skb */
130 err = br_fill_vlan_tinfo(skb, vtbegin->vid,
131 vtbegin->tinfo.tunnel_id,
132 BRIDGE_VLAN_INFO_RANGE_BEGIN);
136 err = br_fill_vlan_tinfo(skb, vtend->vid,
137 vtend->tinfo.tunnel_id,
138 BRIDGE_VLAN_INFO_RANGE_END);
142 err = br_fill_vlan_tinfo(skb, vtbegin->vid,
143 vtbegin->tinfo.tunnel_id,
152 int br_fill_vlan_tunnel_info(struct sk_buff *skb,
153 struct net_bridge_vlan_group *vg)
155 struct net_bridge_vlan *vtbegin = NULL;
156 struct net_bridge_vlan *vtend = NULL;
157 struct net_bridge_vlan *v;
160 /* Count number of vlan infos */
161 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
162 /* only a context, bridge vlan not activated */
163 if (!br_vlan_should_use(v))
166 if (!v->tinfo.tunnel_dst)
171 } else if ((v->vid - vtend->vid) == 1 &&
172 vlan_tunid_inrange(v, vtend)) {
176 err = br_fill_vlan_tinfo_range(skb, vtbegin, vtend);
186 err = br_fill_vlan_tinfo_range(skb, vtbegin, vtend);
194 static const struct nla_policy vlan_tunnel_policy[IFLA_BRIDGE_VLAN_TUNNEL_MAX + 1] = {
195 [IFLA_BRIDGE_VLAN_TUNNEL_ID] = { .type = NLA_U32 },
196 [IFLA_BRIDGE_VLAN_TUNNEL_VID] = { .type = NLA_U16 },
197 [IFLA_BRIDGE_VLAN_TUNNEL_FLAGS] = { .type = NLA_U16 },
200 static int br_vlan_tunnel_info(struct net_bridge_port *p, int cmd,
201 u16 vid, u32 tun_id, bool *changed)
210 err = nbp_vlan_tunnel_info_add(p, vid, tun_id);
215 if (!nbp_vlan_tunnel_info_delete(p, vid))
223 int br_parse_vlan_tunnel_info(struct nlattr *attr,
224 struct vtunnel_info *tinfo)
226 struct nlattr *tb[IFLA_BRIDGE_VLAN_TUNNEL_MAX + 1];
231 memset(tinfo, 0, sizeof(*tinfo));
233 err = nla_parse_nested(tb, IFLA_BRIDGE_VLAN_TUNNEL_MAX, attr,
234 vlan_tunnel_policy, NULL);
238 if (!tb[IFLA_BRIDGE_VLAN_TUNNEL_ID] ||
239 !tb[IFLA_BRIDGE_VLAN_TUNNEL_VID])
242 tun_id = nla_get_u32(tb[IFLA_BRIDGE_VLAN_TUNNEL_ID]);
243 vid = nla_get_u16(tb[IFLA_BRIDGE_VLAN_TUNNEL_VID]);
244 if (vid >= VLAN_VID_MASK)
247 if (tb[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS])
248 flags = nla_get_u16(tb[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS]);
250 tinfo->tunid = tun_id;
252 tinfo->flags = flags;
257 int br_process_vlan_tunnel_info(struct net_bridge *br,
258 struct net_bridge_port *p, int cmd,
259 struct vtunnel_info *tinfo_curr,
260 struct vtunnel_info *tinfo_last,
265 if (tinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
266 if (tinfo_last->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN)
268 memcpy(tinfo_last, tinfo_curr, sizeof(struct vtunnel_info));
269 } else if (tinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END) {
272 if (!(tinfo_last->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN))
274 if ((tinfo_curr->vid - tinfo_last->vid) !=
275 (tinfo_curr->tunid - tinfo_last->tunid))
277 t = tinfo_last->tunid;
278 for (v = tinfo_last->vid; v <= tinfo_curr->vid; v++) {
279 err = br_vlan_tunnel_info(p, cmd, v, t, changed);
284 memset(tinfo_last, 0, sizeof(struct vtunnel_info));
285 memset(tinfo_curr, 0, sizeof(struct vtunnel_info));
287 if (tinfo_last->flags)
289 err = br_vlan_tunnel_info(p, cmd, tinfo_curr->vid,
290 tinfo_curr->tunid, changed);
293 memset(tinfo_last, 0, sizeof(struct vtunnel_info));
294 memset(tinfo_curr, 0, sizeof(struct vtunnel_info));