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 vlan_net_id;
25 static struct tc_action_ops act_vlan_ops;
27 static int tcf_vlan(struct sk_buff *skb, const struct tc_action *a,
28 struct tcf_result *res)
30 struct tcf_vlan *v = to_vlan(a);
34 spin_lock(&v->tcf_lock);
35 tcf_lastuse_update(&v->tcf_tm);
36 bstats_update(&v->tcf_bstats, skb);
37 action = v->tcf_action;
39 switch (v->tcfv_action) {
40 case TCA_VLAN_ACT_POP:
41 err = skb_vlan_pop(skb);
45 case TCA_VLAN_ACT_PUSH:
46 err = skb_vlan_push(skb, v->tcfv_push_proto, v->tcfv_push_vid);
58 v->tcf_qstats.drops++;
60 spin_unlock(&v->tcf_lock);
64 static const struct nla_policy vlan_policy[TCA_VLAN_MAX + 1] = {
65 [TCA_VLAN_PARMS] = { .len = sizeof(struct tc_vlan) },
66 [TCA_VLAN_PUSH_VLAN_ID] = { .type = NLA_U16 },
67 [TCA_VLAN_PUSH_VLAN_PROTOCOL] = { .type = NLA_U16 },
70 static int tcf_vlan_init(struct net *net, struct nlattr *nla,
71 struct nlattr *est, struct tc_action **a,
74 struct tc_action_net *tn = net_generic(net, vlan_net_id);
75 struct nlattr *tb[TCA_VLAN_MAX + 1];
80 __be16 push_proto = 0;
87 err = nla_parse_nested(tb, TCA_VLAN_MAX, nla, vlan_policy);
91 if (!tb[TCA_VLAN_PARMS])
93 parm = nla_data(tb[TCA_VLAN_PARMS]);
94 exists = tcf_hash_check(tn, parm->index, a, bind);
98 switch (parm->v_action) {
99 case TCA_VLAN_ACT_POP:
101 case TCA_VLAN_ACT_PUSH:
102 if (!tb[TCA_VLAN_PUSH_VLAN_ID]) {
104 tcf_hash_release(*a, bind);
107 push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]);
108 if (push_vid >= VLAN_VID_MASK) {
110 tcf_hash_release(*a, bind);
114 if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) {
115 push_proto = nla_get_be16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]);
116 switch (push_proto) {
117 case htons(ETH_P_8021Q):
118 case htons(ETH_P_8021AD):
121 return -EPROTONOSUPPORT;
124 push_proto = htons(ETH_P_8021Q);
129 tcf_hash_release(*a, bind);
132 action = parm->v_action;
135 ret = tcf_hash_create(tn, parm->index, est, a,
136 &act_vlan_ops, bind, false);
142 tcf_hash_release(*a, bind);
149 spin_lock_bh(&v->tcf_lock);
151 v->tcfv_action = action;
152 v->tcfv_push_vid = push_vid;
153 v->tcfv_push_proto = push_proto;
155 v->tcf_action = parm->action;
157 spin_unlock_bh(&v->tcf_lock);
159 if (ret == ACT_P_CREATED)
160 tcf_hash_insert(tn, *a);
164 static int tcf_vlan_dump(struct sk_buff *skb, struct tc_action *a,
167 unsigned char *b = skb_tail_pointer(skb);
168 struct tcf_vlan *v = to_vlan(a);
169 struct tc_vlan opt = {
170 .index = v->tcf_index,
171 .refcnt = v->tcf_refcnt - ref,
172 .bindcnt = v->tcf_bindcnt - bind,
173 .action = v->tcf_action,
174 .v_action = v->tcfv_action,
178 if (nla_put(skb, TCA_VLAN_PARMS, sizeof(opt), &opt))
179 goto nla_put_failure;
181 if (v->tcfv_action == TCA_VLAN_ACT_PUSH &&
182 (nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_ID, v->tcfv_push_vid) ||
183 nla_put_be16(skb, TCA_VLAN_PUSH_VLAN_PROTOCOL,
184 v->tcfv_push_proto)))
185 goto nla_put_failure;
187 tcf_tm_dump(&t, &v->tcf_tm);
188 if (nla_put_64bit(skb, TCA_VLAN_TM, sizeof(t), &t, TCA_VLAN_PAD))
189 goto nla_put_failure;
197 static int tcf_vlan_walker(struct net *net, struct sk_buff *skb,
198 struct netlink_callback *cb, int type,
199 const struct tc_action_ops *ops)
201 struct tc_action_net *tn = net_generic(net, vlan_net_id);
203 return tcf_generic_walker(tn, skb, cb, type, ops);
206 static int tcf_vlan_search(struct net *net, struct tc_action **a, u32 index)
208 struct tc_action_net *tn = net_generic(net, vlan_net_id);
210 return tcf_hash_search(tn, a, index);
213 static struct tc_action_ops act_vlan_ops = {
215 .type = TCA_ACT_VLAN,
216 .owner = THIS_MODULE,
218 .dump = tcf_vlan_dump,
219 .init = tcf_vlan_init,
220 .walk = tcf_vlan_walker,
221 .lookup = tcf_vlan_search,
222 .size = sizeof(struct tcf_vlan),
225 static __net_init int vlan_init_net(struct net *net)
227 struct tc_action_net *tn = net_generic(net, vlan_net_id);
229 return tc_action_net_init(tn, &act_vlan_ops, VLAN_TAB_MASK);
232 static void __net_exit vlan_exit_net(struct net *net)
234 struct tc_action_net *tn = net_generic(net, vlan_net_id);
236 tc_action_net_exit(tn);
239 static struct pernet_operations vlan_net_ops = {
240 .init = vlan_init_net,
241 .exit = vlan_exit_net,
243 .size = sizeof(struct tc_action_net),
246 static int __init vlan_init_module(void)
248 return tcf_register_action(&act_vlan_ops, &vlan_net_ops);
251 static void __exit vlan_cleanup_module(void)
253 tcf_unregister_action(&act_vlan_ops, &vlan_net_ops);
256 module_init(vlan_init_module);
257 module_exit(vlan_cleanup_module);
259 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
260 MODULE_DESCRIPTION("vlan manipulation actions");
261 MODULE_LICENSE("GPL v2");