1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2020, Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
3 #include <linux/kernel.h>
4 #include <linux/netdevice.h>
5 #include <linux/rtnetlink.h>
6 #include <linux/slab.h>
7 #include <net/ip_tunnels.h>
9 #include "br_private.h"
10 #include "br_private_tunnel.h"
12 static bool __vlan_tun_put(struct sk_buff *skb, const struct net_bridge_vlan *v)
14 __be32 tid = tunnel_id_to_key32(v->tinfo.tunnel_id);
17 if (!v->tinfo.tunnel_dst)
20 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_TUNNEL_INFO);
23 if (nla_put_u32(skb, BRIDGE_VLANDB_TINFO_ID, be32_to_cpu(tid))) {
24 nla_nest_cancel(skb, nest);
27 nla_nest_end(skb, nest);
32 static bool __vlan_tun_can_enter_range(const struct net_bridge_vlan *v_curr,
33 const struct net_bridge_vlan *range_end)
35 return (!v_curr->tinfo.tunnel_dst && !range_end->tinfo.tunnel_dst) ||
36 vlan_tunid_inrange(v_curr, range_end);
39 /* check if the options' state of v_curr allow it to enter the range */
40 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
41 const struct net_bridge_vlan *range_end)
43 return v_curr->state == range_end->state &&
44 __vlan_tun_can_enter_range(v_curr, range_end);
47 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v)
49 return !nla_put_u8(skb, BRIDGE_VLANDB_ENTRY_STATE,
50 br_vlan_get_state(v)) &&
51 __vlan_tun_put(skb, v);
54 size_t br_vlan_opts_nl_size(void)
56 return nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_ENTRY_STATE */
57 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY_TUNNEL_INFO */
58 + nla_total_size(sizeof(u32)); /* BRIDGE_VLANDB_TINFO_ID */
61 static int br_vlan_modify_state(struct net_bridge_vlan_group *vg,
62 struct net_bridge_vlan *v,
65 struct netlink_ext_ack *extack)
67 struct net_bridge *br;
71 if (state > BR_STATE_BLOCKING) {
72 NL_SET_ERR_MSG_MOD(extack, "Invalid vlan state");
76 if (br_vlan_is_brentry(v))
81 if (br->stp_enabled == BR_KERNEL_STP) {
82 NL_SET_ERR_MSG_MOD(extack, "Can't modify vlan state when using kernel STP");
86 if (v->state == state)
89 if (v->vid == br_get_pvid(vg))
90 br_vlan_set_pvid_state(vg, state);
92 br_vlan_set_state(v, state);
98 static const struct nla_policy br_vlandb_tinfo_pol[BRIDGE_VLANDB_TINFO_MAX + 1] = {
99 [BRIDGE_VLANDB_TINFO_ID] = { .type = NLA_U32 },
100 [BRIDGE_VLANDB_TINFO_CMD] = { .type = NLA_U32 },
103 static int br_vlan_modify_tunnel(const struct net_bridge_port *p,
104 struct net_bridge_vlan *v,
107 struct netlink_ext_ack *extack)
109 struct nlattr *tun_tb[BRIDGE_VLANDB_TINFO_MAX + 1], *attr;
110 struct bridge_vlan_info *vinfo;
115 NL_SET_ERR_MSG_MOD(extack, "Can't modify tunnel mapping of non-port vlans");
118 if (!(p->flags & BR_VLAN_TUNNEL)) {
119 NL_SET_ERR_MSG_MOD(extack, "Port doesn't have tunnel flag set");
123 attr = tb[BRIDGE_VLANDB_ENTRY_TUNNEL_INFO];
124 err = nla_parse_nested(tun_tb, BRIDGE_VLANDB_TINFO_MAX, attr,
125 br_vlandb_tinfo_pol, extack);
129 if (!tun_tb[BRIDGE_VLANDB_TINFO_CMD]) {
130 NL_SET_ERR_MSG_MOD(extack, "Missing tunnel command attribute");
133 cmd = nla_get_u32(tun_tb[BRIDGE_VLANDB_TINFO_CMD]);
136 if (!tun_tb[BRIDGE_VLANDB_TINFO_ID]) {
137 NL_SET_ERR_MSG_MOD(extack, "Missing tunnel id attribute");
140 /* when working on vlan ranges this is the starting tunnel id */
141 tun_id = nla_get_u32(tun_tb[BRIDGE_VLANDB_TINFO_ID]);
142 /* vlan info attr is guaranteed by br_vlan_rtm_process_one */
143 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]);
144 /* tunnel ids are mapped to each vlan in increasing order,
145 * the starting vlan is in BRIDGE_VLANDB_ENTRY_INFO and v is the
146 * current vlan, so we compute: tun_id + v - vinfo->vid
148 tun_id += v->vid - vinfo->vid;
153 NL_SET_ERR_MSG_MOD(extack, "Unsupported tunnel command");
157 return br_vlan_tunnel_info(p, cmd, v->vid, tun_id, changed);
160 static int br_vlan_process_one_opts(const struct net_bridge *br,
161 const struct net_bridge_port *p,
162 struct net_bridge_vlan_group *vg,
163 struct net_bridge_vlan *v,
166 struct netlink_ext_ack *extack)
171 if (tb[BRIDGE_VLANDB_ENTRY_STATE]) {
172 u8 state = nla_get_u8(tb[BRIDGE_VLANDB_ENTRY_STATE]);
174 err = br_vlan_modify_state(vg, v, state, changed, extack);
178 if (tb[BRIDGE_VLANDB_ENTRY_TUNNEL_INFO]) {
179 err = br_vlan_modify_tunnel(p, v, tb, changed, extack);
187 int br_vlan_process_options(const struct net_bridge *br,
188 const struct net_bridge_port *p,
189 struct net_bridge_vlan *range_start,
190 struct net_bridge_vlan *range_end,
192 struct netlink_ext_ack *extack)
194 struct net_bridge_vlan *v, *curr_start = NULL, *curr_end = NULL;
195 struct net_bridge_vlan_group *vg;
200 vg = nbp_vlan_group(p);
202 vg = br_vlan_group(br);
204 if (!range_start || !br_vlan_should_use(range_start)) {
205 NL_SET_ERR_MSG_MOD(extack, "Vlan range start doesn't exist, can't process options");
208 if (!range_end || !br_vlan_should_use(range_end)) {
209 NL_SET_ERR_MSG_MOD(extack, "Vlan range end doesn't exist, can't process options");
213 pvid = br_get_pvid(vg);
214 for (vid = range_start->vid; vid <= range_end->vid; vid++) {
215 bool changed = false;
217 v = br_vlan_find(vg, vid);
218 if (!v || !br_vlan_should_use(v)) {
219 NL_SET_ERR_MSG_MOD(extack, "Vlan in range doesn't exist, can't process options");
224 err = br_vlan_process_one_opts(br, p, vg, v, tb, &changed,
230 /* vlan options changed, check for range */
237 if (v->vid == pvid ||
238 !br_vlan_can_enter_range(v, curr_end)) {
239 br_vlan_notify(br, p, curr_start->vid,
240 curr_end->vid, RTM_NEWVLAN);
245 /* nothing changed and nothing to notify yet */
249 br_vlan_notify(br, p, curr_start->vid, curr_end->vid,
256 br_vlan_notify(br, p, curr_start->vid, curr_end->vid,