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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
4 */
5
6#include <linux/module.h>
7#include <linux/init.h>
8#include <linux/kernel.h>
9#include <linux/skbuff.h>
10#include <linux/rtnetlink.h>
11#include <linux/if_vlan.h>
12#include <net/netlink.h>
13#include <net/pkt_sched.h>
14#include <net/pkt_cls.h>
15
16#include <linux/tc_act/tc_vlan.h>
17#include <net/tc_act/tc_vlan.h>
18
19static unsigned int vlan_net_id;
20static struct tc_action_ops act_vlan_ops;
21
22static int tcf_vlan_act(struct sk_buff *skb, const struct tc_action *a,
23 struct tcf_result *res)
24{
25 struct tcf_vlan *v = to_vlan(a);
26 struct tcf_vlan_params *p;
27 int action;
28 int err;
29 u16 tci;
30
31 tcf_lastuse_update(&v->tcf_tm);
32 bstats_cpu_update(this_cpu_ptr(v->common.cpu_bstats), skb);
33
34 /* Ensure 'data' points at mac_header prior calling vlan manipulating
35 * functions.
36 */
37 if (skb_at_tc_ingress(skb))
38 skb_push_rcsum(skb, skb->mac_len);
39
40 action = READ_ONCE(v->tcf_action);
41
42 p = rcu_dereference_bh(v->vlan_p);
43
44 switch (p->tcfv_action) {
45 case TCA_VLAN_ACT_POP:
46 err = skb_vlan_pop(skb);
47 if (err)
48 goto drop;
49 break;
50 case TCA_VLAN_ACT_PUSH:
51 err = skb_vlan_push(skb, p->tcfv_push_proto, p->tcfv_push_vid |
52 (p->tcfv_push_prio << VLAN_PRIO_SHIFT));
53 if (err)
54 goto drop;
55 break;
56 case TCA_VLAN_ACT_MODIFY:
57 /* No-op if no vlan tag (either hw-accel or in-payload) */
58 if (!skb_vlan_tagged(skb))
59 goto out;
60 /* extract existing tag (and guarantee no hw-accel tag) */
61 if (skb_vlan_tag_present(skb)) {
62 tci = skb_vlan_tag_get(skb);
63 __vlan_hwaccel_clear_tag(skb);
64 } else {
65 /* in-payload vlan tag, pop it */
66 err = __skb_vlan_pop(skb, &tci);
67 if (err)
68 goto drop;
69 }
70 /* replace the vid */
71 tci = (tci & ~VLAN_VID_MASK) | p->tcfv_push_vid;
72 /* replace prio bits, if tcfv_push_prio specified */
73 if (p->tcfv_push_prio) {
74 tci &= ~VLAN_PRIO_MASK;
75 tci |= p->tcfv_push_prio << VLAN_PRIO_SHIFT;
76 }
77 /* put updated tci as hwaccel tag */
78 __vlan_hwaccel_put_tag(skb, p->tcfv_push_proto, tci);
79 break;
80 default:
81 BUG();
82 }
83
84out:
85 if (skb_at_tc_ingress(skb))
86 skb_pull_rcsum(skb, skb->mac_len);
87
88 return action;
89
90drop:
91 qstats_drop_inc(this_cpu_ptr(v->common.cpu_qstats));
92 return TC_ACT_SHOT;
93}
94
95static const struct nla_policy vlan_policy[TCA_VLAN_MAX + 1] = {
96 [TCA_VLAN_PARMS] = { .len = sizeof(struct tc_vlan) },
97 [TCA_VLAN_PUSH_VLAN_ID] = { .type = NLA_U16 },
98 [TCA_VLAN_PUSH_VLAN_PROTOCOL] = { .type = NLA_U16 },
99 [TCA_VLAN_PUSH_VLAN_PRIORITY] = { .type = NLA_U8 },
100};
101
102static int tcf_vlan_init(struct net *net, struct nlattr *nla,
103 struct nlattr *est, struct tc_action **a,
104 int ovr, int bind, bool rtnl_held,
105 struct tcf_proto *tp, struct netlink_ext_ack *extack)
106{
107 struct tc_action_net *tn = net_generic(net, vlan_net_id);
108 struct nlattr *tb[TCA_VLAN_MAX + 1];
109 struct tcf_chain *goto_ch = NULL;
110 struct tcf_vlan_params *p;
111 struct tc_vlan *parm;
112 struct tcf_vlan *v;
113 int action;
114 u16 push_vid = 0;
115 __be16 push_proto = 0;
116 u8 push_prio = 0;
117 bool exists = false;
118 int ret = 0, err;
119 u32 index;
120
121 if (!nla)
122 return -EINVAL;
123
124 err = nla_parse_nested_deprecated(tb, TCA_VLAN_MAX, nla, vlan_policy,
125 NULL);
126 if (err < 0)
127 return err;
128
129 if (!tb[TCA_VLAN_PARMS])
130 return -EINVAL;
131 parm = nla_data(tb[TCA_VLAN_PARMS]);
132 index = parm->index;
133 err = tcf_idr_check_alloc(tn, &index, a, bind);
134 if (err < 0)
135 return err;
136 exists = err;
137 if (exists && bind)
138 return 0;
139
140 switch (parm->v_action) {
141 case TCA_VLAN_ACT_POP:
142 break;
143 case TCA_VLAN_ACT_PUSH:
144 case TCA_VLAN_ACT_MODIFY:
145 if (!tb[TCA_VLAN_PUSH_VLAN_ID]) {
146 if (exists)
147 tcf_idr_release(*a, bind);
148 else
149 tcf_idr_cleanup(tn, index);
150 return -EINVAL;
151 }
152 push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]);
153 if (push_vid >= VLAN_VID_MASK) {
154 if (exists)
155 tcf_idr_release(*a, bind);
156 else
157 tcf_idr_cleanup(tn, index);
158 return -ERANGE;
159 }
160
161 if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) {
162 push_proto = nla_get_be16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]);
163 switch (push_proto) {
164 case htons(ETH_P_8021Q):
165 case htons(ETH_P_8021AD):
166 break;
167 default:
168 if (exists)
169 tcf_idr_release(*a, bind);
170 else
171 tcf_idr_cleanup(tn, index);
172 return -EPROTONOSUPPORT;
173 }
174 } else {
175 push_proto = htons(ETH_P_8021Q);
176 }
177
178 if (tb[TCA_VLAN_PUSH_VLAN_PRIORITY])
179 push_prio = nla_get_u8(tb[TCA_VLAN_PUSH_VLAN_PRIORITY]);
180 break;
181 default:
182 if (exists)
183 tcf_idr_release(*a, bind);
184 else
185 tcf_idr_cleanup(tn, index);
186 return -EINVAL;
187 }
188 action = parm->v_action;
189
190 if (!exists) {
191 ret = tcf_idr_create(tn, index, est, a,
192 &act_vlan_ops, bind, true);
193 if (ret) {
194 tcf_idr_cleanup(tn, index);
195 return ret;
196 }
197
198 ret = ACT_P_CREATED;
199 } else if (!ovr) {
200 tcf_idr_release(*a, bind);
201 return -EEXIST;
202 }
203
204 err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
205 if (err < 0)
206 goto release_idr;
207
208 v = to_vlan(*a);
209
210 p = kzalloc(sizeof(*p), GFP_KERNEL);
211 if (!p) {
212 err = -ENOMEM;
213 goto put_chain;
214 }
215
216 p->tcfv_action = action;
217 p->tcfv_push_vid = push_vid;
218 p->tcfv_push_prio = push_prio;
219 p->tcfv_push_proto = push_proto;
220
221 spin_lock_bh(&v->tcf_lock);
222 goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
223 rcu_swap_protected(v->vlan_p, p, lockdep_is_held(&v->tcf_lock));
224 spin_unlock_bh(&v->tcf_lock);
225
226 if (goto_ch)
227 tcf_chain_put_by_act(goto_ch);
228 if (p)
229 kfree_rcu(p, rcu);
230
231 if (ret == ACT_P_CREATED)
232 tcf_idr_insert(tn, *a);
233 return ret;
234put_chain:
235 if (goto_ch)
236 tcf_chain_put_by_act(goto_ch);
237release_idr:
238 tcf_idr_release(*a, bind);
239 return err;
240}
241
242static void tcf_vlan_cleanup(struct tc_action *a)
243{
244 struct tcf_vlan *v = to_vlan(a);
245 struct tcf_vlan_params *p;
246
247 p = rcu_dereference_protected(v->vlan_p, 1);
248 if (p)
249 kfree_rcu(p, rcu);
250}
251
252static int tcf_vlan_dump(struct sk_buff *skb, struct tc_action *a,
253 int bind, int ref)
254{
255 unsigned char *b = skb_tail_pointer(skb);
256 struct tcf_vlan *v = to_vlan(a);
257 struct tcf_vlan_params *p;
258 struct tc_vlan opt = {
259 .index = v->tcf_index,
260 .refcnt = refcount_read(&v->tcf_refcnt) - ref,
261 .bindcnt = atomic_read(&v->tcf_bindcnt) - bind,
262 };
263 struct tcf_t t;
264
265 spin_lock_bh(&v->tcf_lock);
266 opt.action = v->tcf_action;
267 p = rcu_dereference_protected(v->vlan_p, lockdep_is_held(&v->tcf_lock));
268 opt.v_action = p->tcfv_action;
269 if (nla_put(skb, TCA_VLAN_PARMS, sizeof(opt), &opt))
270 goto nla_put_failure;
271
272 if ((p->tcfv_action == TCA_VLAN_ACT_PUSH ||
273 p->tcfv_action == TCA_VLAN_ACT_MODIFY) &&
274 (nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_ID, p->tcfv_push_vid) ||
275 nla_put_be16(skb, TCA_VLAN_PUSH_VLAN_PROTOCOL,
276 p->tcfv_push_proto) ||
277 (nla_put_u8(skb, TCA_VLAN_PUSH_VLAN_PRIORITY,
278 p->tcfv_push_prio))))
279 goto nla_put_failure;
280
281 tcf_tm_dump(&t, &v->tcf_tm);
282 if (nla_put_64bit(skb, TCA_VLAN_TM, sizeof(t), &t, TCA_VLAN_PAD))
283 goto nla_put_failure;
284 spin_unlock_bh(&v->tcf_lock);
285
286 return skb->len;
287
288nla_put_failure:
289 spin_unlock_bh(&v->tcf_lock);
290 nlmsg_trim(skb, b);
291 return -1;
292}
293
294static int tcf_vlan_walker(struct net *net, struct sk_buff *skb,
295 struct netlink_callback *cb, int type,
296 const struct tc_action_ops *ops,
297 struct netlink_ext_ack *extack)
298{
299 struct tc_action_net *tn = net_generic(net, vlan_net_id);
300
301 return tcf_generic_walker(tn, skb, cb, type, ops, extack);
302}
303
304static void tcf_vlan_stats_update(struct tc_action *a, u64 bytes, u32 packets,
305 u64 lastuse, bool hw)
306{
307 struct tcf_vlan *v = to_vlan(a);
308 struct tcf_t *tm = &v->tcf_tm;
309
310 _bstats_cpu_update(this_cpu_ptr(a->cpu_bstats), bytes, packets);
311 if (hw)
312 _bstats_cpu_update(this_cpu_ptr(a->cpu_bstats_hw),
313 bytes, packets);
314 tm->lastuse = max_t(u64, tm->lastuse, lastuse);
315}
316
317static int tcf_vlan_search(struct net *net, struct tc_action **a, u32 index)
318{
319 struct tc_action_net *tn = net_generic(net, vlan_net_id);
320
321 return tcf_idr_search(tn, a, index);
322}
323
324static size_t tcf_vlan_get_fill_size(const struct tc_action *act)
325{
326 return nla_total_size(sizeof(struct tc_vlan))
327 + nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_ID */
328 + nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_PROTOCOL */
329 + nla_total_size(sizeof(u8)); /* TCA_VLAN_PUSH_VLAN_PRIORITY */
330}
331
332static struct tc_action_ops act_vlan_ops = {
333 .kind = "vlan",
334 .id = TCA_ID_VLAN,
335 .owner = THIS_MODULE,
336 .act = tcf_vlan_act,
337 .dump = tcf_vlan_dump,
338 .init = tcf_vlan_init,
339 .cleanup = tcf_vlan_cleanup,
340 .walk = tcf_vlan_walker,
341 .stats_update = tcf_vlan_stats_update,
342 .get_fill_size = tcf_vlan_get_fill_size,
343 .lookup = tcf_vlan_search,
344 .size = sizeof(struct tcf_vlan),
345};
346
347static __net_init int vlan_init_net(struct net *net)
348{
349 struct tc_action_net *tn = net_generic(net, vlan_net_id);
350
351 return tc_action_net_init(net, tn, &act_vlan_ops);
352}
353
354static void __net_exit vlan_exit_net(struct list_head *net_list)
355{
356 tc_action_net_exit(net_list, vlan_net_id);
357}
358
359static struct pernet_operations vlan_net_ops = {
360 .init = vlan_init_net,
361 .exit_batch = vlan_exit_net,
362 .id = &vlan_net_id,
363 .size = sizeof(struct tc_action_net),
364};
365
366static int __init vlan_init_module(void)
367{
368 return tcf_register_action(&act_vlan_ops, &vlan_net_ops);
369}
370
371static void __exit vlan_cleanup_module(void)
372{
373 tcf_unregister_action(&act_vlan_ops, &vlan_net_ops);
374}
375
376module_init(vlan_init_module);
377module_exit(vlan_cleanup_module);
378
379MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
380MODULE_DESCRIPTION("vlan manipulation actions");
381MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
4 */
5
6#include <linux/module.h>
7#include <linux/init.h>
8#include <linux/kernel.h>
9#include <linux/skbuff.h>
10#include <linux/rtnetlink.h>
11#include <linux/if_vlan.h>
12#include <net/netlink.h>
13#include <net/pkt_sched.h>
14#include <net/pkt_cls.h>
15#include <net/tc_wrapper.h>
16
17#include <linux/tc_act/tc_vlan.h>
18#include <net/tc_act/tc_vlan.h>
19
20static struct tc_action_ops act_vlan_ops;
21
22TC_INDIRECT_SCOPE int tcf_vlan_act(struct sk_buff *skb,
23 const struct tc_action *a,
24 struct tcf_result *res)
25{
26 struct tcf_vlan *v = to_vlan(a);
27 struct tcf_vlan_params *p;
28 int action;
29 int err;
30 u16 tci;
31
32 tcf_lastuse_update(&v->tcf_tm);
33 tcf_action_update_bstats(&v->common, skb);
34
35 /* Ensure 'data' points at mac_header prior calling vlan manipulating
36 * functions.
37 */
38 if (skb_at_tc_ingress(skb))
39 skb_push_rcsum(skb, skb->mac_len);
40
41 action = READ_ONCE(v->tcf_action);
42
43 p = rcu_dereference_bh(v->vlan_p);
44
45 switch (p->tcfv_action) {
46 case TCA_VLAN_ACT_POP:
47 err = skb_vlan_pop(skb);
48 if (err)
49 goto drop;
50 break;
51 case TCA_VLAN_ACT_PUSH:
52 err = skb_vlan_push(skb, p->tcfv_push_proto, p->tcfv_push_vid |
53 (p->tcfv_push_prio << VLAN_PRIO_SHIFT));
54 if (err)
55 goto drop;
56 break;
57 case TCA_VLAN_ACT_MODIFY:
58 /* No-op if no vlan tag (either hw-accel or in-payload) */
59 if (!skb_vlan_tagged(skb))
60 goto out;
61 /* extract existing tag (and guarantee no hw-accel tag) */
62 if (skb_vlan_tag_present(skb)) {
63 tci = skb_vlan_tag_get(skb);
64 __vlan_hwaccel_clear_tag(skb);
65 } else {
66 /* in-payload vlan tag, pop it */
67 err = __skb_vlan_pop(skb, &tci);
68 if (err)
69 goto drop;
70 }
71 /* replace the vid */
72 tci = (tci & ~VLAN_VID_MASK) | p->tcfv_push_vid;
73 /* replace prio bits, if tcfv_push_prio specified */
74 if (p->tcfv_push_prio_exists) {
75 tci &= ~VLAN_PRIO_MASK;
76 tci |= p->tcfv_push_prio << VLAN_PRIO_SHIFT;
77 }
78 /* put updated tci as hwaccel tag */
79 __vlan_hwaccel_put_tag(skb, p->tcfv_push_proto, tci);
80 break;
81 case TCA_VLAN_ACT_POP_ETH:
82 err = skb_eth_pop(skb);
83 if (err)
84 goto drop;
85 break;
86 case TCA_VLAN_ACT_PUSH_ETH:
87 err = skb_eth_push(skb, p->tcfv_push_dst, p->tcfv_push_src);
88 if (err)
89 goto drop;
90 break;
91 default:
92 BUG();
93 }
94
95out:
96 if (skb_at_tc_ingress(skb))
97 skb_pull_rcsum(skb, skb->mac_len);
98
99 return action;
100
101drop:
102 tcf_action_inc_drop_qstats(&v->common);
103 return TC_ACT_SHOT;
104}
105
106static const struct nla_policy vlan_policy[TCA_VLAN_MAX + 1] = {
107 [TCA_VLAN_UNSPEC] = { .strict_start_type = TCA_VLAN_PUSH_ETH_DST },
108 [TCA_VLAN_PARMS] = { .len = sizeof(struct tc_vlan) },
109 [TCA_VLAN_PUSH_VLAN_ID] = { .type = NLA_U16 },
110 [TCA_VLAN_PUSH_VLAN_PROTOCOL] = { .type = NLA_U16 },
111 [TCA_VLAN_PUSH_VLAN_PRIORITY] = { .type = NLA_U8 },
112 [TCA_VLAN_PUSH_ETH_DST] = NLA_POLICY_ETH_ADDR,
113 [TCA_VLAN_PUSH_ETH_SRC] = NLA_POLICY_ETH_ADDR,
114};
115
116static int tcf_vlan_init(struct net *net, struct nlattr *nla,
117 struct nlattr *est, struct tc_action **a,
118 struct tcf_proto *tp, u32 flags,
119 struct netlink_ext_ack *extack)
120{
121 struct tc_action_net *tn = net_generic(net, act_vlan_ops.net_id);
122 bool bind = flags & TCA_ACT_FLAGS_BIND;
123 struct nlattr *tb[TCA_VLAN_MAX + 1];
124 struct tcf_chain *goto_ch = NULL;
125 bool push_prio_exists = false;
126 struct tcf_vlan_params *p;
127 struct tc_vlan *parm;
128 struct tcf_vlan *v;
129 int action;
130 u16 push_vid = 0;
131 __be16 push_proto = 0;
132 u8 push_prio = 0;
133 bool exists = false;
134 int ret = 0, err;
135 u32 index;
136
137 if (!nla)
138 return -EINVAL;
139
140 err = nla_parse_nested_deprecated(tb, TCA_VLAN_MAX, nla, vlan_policy,
141 NULL);
142 if (err < 0)
143 return err;
144
145 if (!tb[TCA_VLAN_PARMS])
146 return -EINVAL;
147 parm = nla_data(tb[TCA_VLAN_PARMS]);
148 index = parm->index;
149 err = tcf_idr_check_alloc(tn, &index, a, bind);
150 if (err < 0)
151 return err;
152 exists = err;
153 if (exists && bind)
154 return 0;
155
156 switch (parm->v_action) {
157 case TCA_VLAN_ACT_POP:
158 break;
159 case TCA_VLAN_ACT_PUSH:
160 case TCA_VLAN_ACT_MODIFY:
161 if (!tb[TCA_VLAN_PUSH_VLAN_ID]) {
162 if (exists)
163 tcf_idr_release(*a, bind);
164 else
165 tcf_idr_cleanup(tn, index);
166 return -EINVAL;
167 }
168 push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]);
169 if (push_vid >= VLAN_VID_MASK) {
170 if (exists)
171 tcf_idr_release(*a, bind);
172 else
173 tcf_idr_cleanup(tn, index);
174 return -ERANGE;
175 }
176
177 if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) {
178 push_proto = nla_get_be16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]);
179 switch (push_proto) {
180 case htons(ETH_P_8021Q):
181 case htons(ETH_P_8021AD):
182 break;
183 default:
184 if (exists)
185 tcf_idr_release(*a, bind);
186 else
187 tcf_idr_cleanup(tn, index);
188 return -EPROTONOSUPPORT;
189 }
190 } else {
191 push_proto = htons(ETH_P_8021Q);
192 }
193
194 push_prio_exists = !!tb[TCA_VLAN_PUSH_VLAN_PRIORITY];
195 if (push_prio_exists)
196 push_prio = nla_get_u8(tb[TCA_VLAN_PUSH_VLAN_PRIORITY]);
197 break;
198 case TCA_VLAN_ACT_POP_ETH:
199 break;
200 case TCA_VLAN_ACT_PUSH_ETH:
201 if (!tb[TCA_VLAN_PUSH_ETH_DST] || !tb[TCA_VLAN_PUSH_ETH_SRC]) {
202 if (exists)
203 tcf_idr_release(*a, bind);
204 else
205 tcf_idr_cleanup(tn, index);
206 return -EINVAL;
207 }
208 break;
209 default:
210 if (exists)
211 tcf_idr_release(*a, bind);
212 else
213 tcf_idr_cleanup(tn, index);
214 return -EINVAL;
215 }
216 action = parm->v_action;
217
218 if (!exists) {
219 ret = tcf_idr_create_from_flags(tn, index, est, a,
220 &act_vlan_ops, bind, flags);
221 if (ret) {
222 tcf_idr_cleanup(tn, index);
223 return ret;
224 }
225
226 ret = ACT_P_CREATED;
227 } else if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
228 tcf_idr_release(*a, bind);
229 return -EEXIST;
230 }
231
232 err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
233 if (err < 0)
234 goto release_idr;
235
236 v = to_vlan(*a);
237
238 p = kzalloc(sizeof(*p), GFP_KERNEL);
239 if (!p) {
240 err = -ENOMEM;
241 goto put_chain;
242 }
243
244 p->tcfv_action = action;
245 p->tcfv_push_vid = push_vid;
246 p->tcfv_push_prio = push_prio;
247 p->tcfv_push_prio_exists = push_prio_exists || action == TCA_VLAN_ACT_PUSH;
248 p->tcfv_push_proto = push_proto;
249
250 if (action == TCA_VLAN_ACT_PUSH_ETH) {
251 nla_memcpy(&p->tcfv_push_dst, tb[TCA_VLAN_PUSH_ETH_DST],
252 ETH_ALEN);
253 nla_memcpy(&p->tcfv_push_src, tb[TCA_VLAN_PUSH_ETH_SRC],
254 ETH_ALEN);
255 }
256
257 spin_lock_bh(&v->tcf_lock);
258 goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
259 p = rcu_replace_pointer(v->vlan_p, p, lockdep_is_held(&v->tcf_lock));
260 spin_unlock_bh(&v->tcf_lock);
261
262 if (goto_ch)
263 tcf_chain_put_by_act(goto_ch);
264 if (p)
265 kfree_rcu(p, rcu);
266
267 return ret;
268put_chain:
269 if (goto_ch)
270 tcf_chain_put_by_act(goto_ch);
271release_idr:
272 tcf_idr_release(*a, bind);
273 return err;
274}
275
276static void tcf_vlan_cleanup(struct tc_action *a)
277{
278 struct tcf_vlan *v = to_vlan(a);
279 struct tcf_vlan_params *p;
280
281 p = rcu_dereference_protected(v->vlan_p, 1);
282 if (p)
283 kfree_rcu(p, rcu);
284}
285
286static int tcf_vlan_dump(struct sk_buff *skb, struct tc_action *a,
287 int bind, int ref)
288{
289 unsigned char *b = skb_tail_pointer(skb);
290 struct tcf_vlan *v = to_vlan(a);
291 struct tcf_vlan_params *p;
292 struct tc_vlan opt = {
293 .index = v->tcf_index,
294 .refcnt = refcount_read(&v->tcf_refcnt) - ref,
295 .bindcnt = atomic_read(&v->tcf_bindcnt) - bind,
296 };
297 struct tcf_t t;
298
299 spin_lock_bh(&v->tcf_lock);
300 opt.action = v->tcf_action;
301 p = rcu_dereference_protected(v->vlan_p, lockdep_is_held(&v->tcf_lock));
302 opt.v_action = p->tcfv_action;
303 if (nla_put(skb, TCA_VLAN_PARMS, sizeof(opt), &opt))
304 goto nla_put_failure;
305
306 if ((p->tcfv_action == TCA_VLAN_ACT_PUSH ||
307 p->tcfv_action == TCA_VLAN_ACT_MODIFY) &&
308 (nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_ID, p->tcfv_push_vid) ||
309 nla_put_be16(skb, TCA_VLAN_PUSH_VLAN_PROTOCOL,
310 p->tcfv_push_proto) ||
311 (p->tcfv_push_prio_exists &&
312 nla_put_u8(skb, TCA_VLAN_PUSH_VLAN_PRIORITY, p->tcfv_push_prio))))
313 goto nla_put_failure;
314
315 if (p->tcfv_action == TCA_VLAN_ACT_PUSH_ETH) {
316 if (nla_put(skb, TCA_VLAN_PUSH_ETH_DST, ETH_ALEN,
317 p->tcfv_push_dst))
318 goto nla_put_failure;
319 if (nla_put(skb, TCA_VLAN_PUSH_ETH_SRC, ETH_ALEN,
320 p->tcfv_push_src))
321 goto nla_put_failure;
322 }
323
324 tcf_tm_dump(&t, &v->tcf_tm);
325 if (nla_put_64bit(skb, TCA_VLAN_TM, sizeof(t), &t, TCA_VLAN_PAD))
326 goto nla_put_failure;
327 spin_unlock_bh(&v->tcf_lock);
328
329 return skb->len;
330
331nla_put_failure:
332 spin_unlock_bh(&v->tcf_lock);
333 nlmsg_trim(skb, b);
334 return -1;
335}
336
337static void tcf_vlan_stats_update(struct tc_action *a, u64 bytes, u64 packets,
338 u64 drops, u64 lastuse, bool hw)
339{
340 struct tcf_vlan *v = to_vlan(a);
341 struct tcf_t *tm = &v->tcf_tm;
342
343 tcf_action_update_stats(a, bytes, packets, drops, hw);
344 tm->lastuse = max_t(u64, tm->lastuse, lastuse);
345}
346
347static size_t tcf_vlan_get_fill_size(const struct tc_action *act)
348{
349 return nla_total_size(sizeof(struct tc_vlan))
350 + nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_ID */
351 + nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_PROTOCOL */
352 + nla_total_size(sizeof(u8)); /* TCA_VLAN_PUSH_VLAN_PRIORITY */
353}
354
355static int tcf_vlan_offload_act_setup(struct tc_action *act, void *entry_data,
356 u32 *index_inc, bool bind,
357 struct netlink_ext_ack *extack)
358{
359 if (bind) {
360 struct flow_action_entry *entry = entry_data;
361
362 switch (tcf_vlan_action(act)) {
363 case TCA_VLAN_ACT_PUSH:
364 entry->id = FLOW_ACTION_VLAN_PUSH;
365 entry->vlan.vid = tcf_vlan_push_vid(act);
366 entry->vlan.proto = tcf_vlan_push_proto(act);
367 entry->vlan.prio = tcf_vlan_push_prio(act);
368 break;
369 case TCA_VLAN_ACT_POP:
370 entry->id = FLOW_ACTION_VLAN_POP;
371 break;
372 case TCA_VLAN_ACT_MODIFY:
373 entry->id = FLOW_ACTION_VLAN_MANGLE;
374 entry->vlan.vid = tcf_vlan_push_vid(act);
375 entry->vlan.proto = tcf_vlan_push_proto(act);
376 entry->vlan.prio = tcf_vlan_push_prio(act);
377 break;
378 case TCA_VLAN_ACT_POP_ETH:
379 entry->id = FLOW_ACTION_VLAN_POP_ETH;
380 break;
381 case TCA_VLAN_ACT_PUSH_ETH:
382 entry->id = FLOW_ACTION_VLAN_PUSH_ETH;
383 tcf_vlan_push_eth(entry->vlan_push_eth.src, entry->vlan_push_eth.dst, act);
384 break;
385 default:
386 NL_SET_ERR_MSG_MOD(extack, "Unsupported vlan action mode offload");
387 return -EOPNOTSUPP;
388 }
389 *index_inc = 1;
390 } else {
391 struct flow_offload_action *fl_action = entry_data;
392
393 switch (tcf_vlan_action(act)) {
394 case TCA_VLAN_ACT_PUSH:
395 fl_action->id = FLOW_ACTION_VLAN_PUSH;
396 break;
397 case TCA_VLAN_ACT_POP:
398 fl_action->id = FLOW_ACTION_VLAN_POP;
399 break;
400 case TCA_VLAN_ACT_MODIFY:
401 fl_action->id = FLOW_ACTION_VLAN_MANGLE;
402 break;
403 case TCA_VLAN_ACT_POP_ETH:
404 fl_action->id = FLOW_ACTION_VLAN_POP_ETH;
405 break;
406 case TCA_VLAN_ACT_PUSH_ETH:
407 fl_action->id = FLOW_ACTION_VLAN_PUSH_ETH;
408 break;
409 default:
410 return -EOPNOTSUPP;
411 }
412 }
413
414 return 0;
415}
416
417static struct tc_action_ops act_vlan_ops = {
418 .kind = "vlan",
419 .id = TCA_ID_VLAN,
420 .owner = THIS_MODULE,
421 .act = tcf_vlan_act,
422 .dump = tcf_vlan_dump,
423 .init = tcf_vlan_init,
424 .cleanup = tcf_vlan_cleanup,
425 .stats_update = tcf_vlan_stats_update,
426 .get_fill_size = tcf_vlan_get_fill_size,
427 .offload_act_setup = tcf_vlan_offload_act_setup,
428 .size = sizeof(struct tcf_vlan),
429};
430
431static __net_init int vlan_init_net(struct net *net)
432{
433 struct tc_action_net *tn = net_generic(net, act_vlan_ops.net_id);
434
435 return tc_action_net_init(net, tn, &act_vlan_ops);
436}
437
438static void __net_exit vlan_exit_net(struct list_head *net_list)
439{
440 tc_action_net_exit(net_list, act_vlan_ops.net_id);
441}
442
443static struct pernet_operations vlan_net_ops = {
444 .init = vlan_init_net,
445 .exit_batch = vlan_exit_net,
446 .id = &act_vlan_ops.net_id,
447 .size = sizeof(struct tc_action_net),
448};
449
450static int __init vlan_init_module(void)
451{
452 return tcf_register_action(&act_vlan_ops, &vlan_net_ops);
453}
454
455static void __exit vlan_cleanup_module(void)
456{
457 tcf_unregister_action(&act_vlan_ops, &vlan_net_ops);
458}
459
460module_init(vlan_init_module);
461module_exit(vlan_cleanup_module);
462
463MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
464MODULE_DESCRIPTION("vlan manipulation actions");
465MODULE_LICENSE("GPL v2");