2 * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/skbuff.h>
14 #include <linux/rtnetlink.h>
15 #include <linux/if_vlan.h>
16 #include <net/netlink.h>
17 #include <net/pkt_sched.h>
19 #include <linux/tc_act/tc_vlan.h>
20 #include <net/tc_act/tc_vlan.h>
22 #define VLAN_TAB_MASK 15
24 static int tcf_vlan(struct sk_buff *skb, const struct tc_action *a,
25 struct tcf_result *res)
27 struct tcf_vlan *v = a->priv;
31 spin_lock(&v->tcf_lock);
32 v->tcf_tm.lastuse = jiffies;
33 bstats_update(&v->tcf_bstats, skb);
34 action = v->tcf_action;
36 /* Ensure 'data' points at mac_header prior calling vlan manipulating
39 if (skb_at_tc_ingress(skb))
40 skb_push_rcsum(skb, skb->mac_len);
42 switch (v->tcfv_action) {
43 case TCA_VLAN_ACT_POP:
44 err = skb_vlan_pop(skb);
48 case TCA_VLAN_ACT_PUSH:
49 err = skb_vlan_push(skb, v->tcfv_push_proto, v->tcfv_push_vid);
61 v->tcf_qstats.drops++;
63 if (skb_at_tc_ingress(skb))
64 skb_pull_rcsum(skb, skb->mac_len);
66 spin_unlock(&v->tcf_lock);
70 static const struct nla_policy vlan_policy[TCA_VLAN_MAX + 1] = {
71 [TCA_VLAN_PARMS] = { .len = sizeof(struct tc_vlan) },
72 [TCA_VLAN_PUSH_VLAN_ID] = { .type = NLA_U16 },
73 [TCA_VLAN_PUSH_VLAN_PROTOCOL] = { .type = NLA_U16 },
76 static int tcf_vlan_init(struct net *net, struct nlattr *nla,
77 struct nlattr *est, struct tc_action *a,
80 struct nlattr *tb[TCA_VLAN_MAX + 1];
85 __be16 push_proto = 0;
92 err = nla_parse_nested(tb, TCA_VLAN_MAX, nla, vlan_policy);
96 if (!tb[TCA_VLAN_PARMS])
98 parm = nla_data(tb[TCA_VLAN_PARMS]);
99 switch (parm->v_action) {
100 case TCA_VLAN_ACT_POP:
102 case TCA_VLAN_ACT_PUSH:
103 if (!tb[TCA_VLAN_PUSH_VLAN_ID])
105 push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]);
106 if (push_vid >= VLAN_VID_MASK)
109 if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) {
110 push_proto = nla_get_be16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]);
111 switch (push_proto) {
112 case htons(ETH_P_8021Q):
113 case htons(ETH_P_8021AD):
116 return -EPROTONOSUPPORT;
119 push_proto = htons(ETH_P_8021Q);
125 action = parm->v_action;
127 if (!tcf_hash_check(parm->index, a, bind)) {
128 ret = tcf_hash_create(parm->index, est, a, sizeof(*v),
137 tcf_hash_release(a, bind);
144 spin_lock_bh(&v->tcf_lock);
146 v->tcfv_action = action;
147 v->tcfv_push_vid = push_vid;
148 v->tcfv_push_proto = push_proto;
150 v->tcf_action = parm->action;
152 spin_unlock_bh(&v->tcf_lock);
154 if (ret == ACT_P_CREATED)
159 static int tcf_vlan_dump(struct sk_buff *skb, struct tc_action *a,
162 unsigned char *b = skb_tail_pointer(skb);
163 struct tcf_vlan *v = a->priv;
164 struct tc_vlan opt = {
165 .index = v->tcf_index,
166 .refcnt = v->tcf_refcnt - ref,
167 .bindcnt = v->tcf_bindcnt - bind,
168 .action = v->tcf_action,
169 .v_action = v->tcfv_action,
173 if (nla_put(skb, TCA_VLAN_PARMS, sizeof(opt), &opt))
174 goto nla_put_failure;
176 if (v->tcfv_action == TCA_VLAN_ACT_PUSH &&
177 (nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_ID, v->tcfv_push_vid) ||
178 nla_put_be16(skb, TCA_VLAN_PUSH_VLAN_PROTOCOL, v->tcfv_push_proto)))
179 goto nla_put_failure;
181 t.install = jiffies_to_clock_t(jiffies - v->tcf_tm.install);
182 t.lastuse = jiffies_to_clock_t(jiffies - v->tcf_tm.lastuse);
183 t.expires = jiffies_to_clock_t(v->tcf_tm.expires);
184 if (nla_put(skb, TCA_VLAN_TM, sizeof(t), &t))
185 goto nla_put_failure;
193 static struct tc_action_ops act_vlan_ops = {
195 .type = TCA_ACT_VLAN,
196 .owner = THIS_MODULE,
198 .dump = tcf_vlan_dump,
199 .init = tcf_vlan_init,
202 static int __init vlan_init_module(void)
204 return tcf_register_action(&act_vlan_ops, VLAN_TAB_MASK);
207 static void __exit vlan_cleanup_module(void)
209 tcf_unregister_action(&act_vlan_ops);
212 module_init(vlan_init_module);
213 module_exit(vlan_cleanup_module);
215 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
216 MODULE_DESCRIPTION("vlan manipulation actions");
217 MODULE_LICENSE("GPL v2");