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Arvid Brodin70ebe4a2014-07-04 23:34:38 +02001/* Copyright 2011-2014 Autronica Fire and Security AS
Arvid Brodinf4214362013-10-30 21:10:47 +01002 *
3 * This program is free software; you can redistribute it and/or modify it
4 * under the terms of the GNU General Public License as published by the Free
5 * Software Foundation; either version 2 of the License, or (at your option)
6 * any later version.
7 *
8 * Author(s):
Arvid Brodin70ebe4a2014-07-04 23:34:38 +02009 * 2011-2014 Arvid Brodin, arvid.brodin@alten.se
Arvid Brodinf4214362013-10-30 21:10:47 +010010 *
11 * This file contains device methods for creating, using and destroying
12 * virtual HSR devices.
13 */
14
15#include <linux/netdevice.h>
16#include <linux/skbuff.h>
17#include <linux/etherdevice.h>
Arvid Brodinf4214362013-10-30 21:10:47 +010018#include <linux/rtnetlink.h>
19#include <linux/pkt_sched.h>
20#include "hsr_device.h"
Arvid Brodin81ba6af2014-07-04 23:35:24 +020021#include "hsr_slave.h"
Arvid Brodinf4214362013-10-30 21:10:47 +010022#include "hsr_framereg.h"
23#include "hsr_main.h"
Arvid Brodinf266a682014-07-04 23:41:03 +020024#include "hsr_forward.h"
Arvid Brodinf4214362013-10-30 21:10:47 +010025
26
27static bool is_admin_up(struct net_device *dev)
28{
29 return dev && (dev->flags & IFF_UP);
30}
31
32static bool is_slave_up(struct net_device *dev)
33{
34 return dev && is_admin_up(dev) && netif_oper_up(dev);
35}
36
37static void __hsr_set_operstate(struct net_device *dev, int transition)
38{
39 write_lock_bh(&dev_base_lock);
40 if (dev->operstate != transition) {
41 dev->operstate = transition;
42 write_unlock_bh(&dev_base_lock);
43 netdev_state_change(dev);
44 } else {
45 write_unlock_bh(&dev_base_lock);
46 }
47}
48
Arvid Brodinc5a75912014-07-04 23:38:05 +020049static void hsr_set_operstate(struct hsr_port *master, bool has_carrier)
Arvid Brodinf4214362013-10-30 21:10:47 +010050{
Arvid Brodinc5a75912014-07-04 23:38:05 +020051 if (!is_admin_up(master->dev)) {
52 __hsr_set_operstate(master->dev, IF_OPER_DOWN);
Arvid Brodinf4214362013-10-30 21:10:47 +010053 return;
54 }
55
Arvid Brodine9aae562014-07-04 23:36:40 +020056 if (has_carrier)
Arvid Brodinc5a75912014-07-04 23:38:05 +020057 __hsr_set_operstate(master->dev, IF_OPER_UP);
Arvid Brodinf4214362013-10-30 21:10:47 +010058 else
Arvid Brodinc5a75912014-07-04 23:38:05 +020059 __hsr_set_operstate(master->dev, IF_OPER_LOWERLAYERDOWN);
Arvid Brodinf4214362013-10-30 21:10:47 +010060}
61
Arvid Brodinc5a75912014-07-04 23:38:05 +020062static bool hsr_check_carrier(struct hsr_port *master)
Arvid Brodinf4214362013-10-30 21:10:47 +010063{
Arvid Brodinc5a75912014-07-04 23:38:05 +020064 struct hsr_port *port;
Arvid Brodine9aae562014-07-04 23:36:40 +020065 bool has_carrier;
66
Arvid Brodinc5a75912014-07-04 23:38:05 +020067 has_carrier = false;
68
69 rcu_read_lock();
70 hsr_for_each_port(master->hsr, port)
71 if ((port->type != HSR_PT_MASTER) && is_slave_up(port->dev)) {
72 has_carrier = true;
73 break;
74 }
75 rcu_read_unlock();
Arvid Brodine9aae562014-07-04 23:36:40 +020076
77 if (has_carrier)
Arvid Brodinc5a75912014-07-04 23:38:05 +020078 netif_carrier_on(master->dev);
Arvid Brodinf4214362013-10-30 21:10:47 +010079 else
Arvid Brodinc5a75912014-07-04 23:38:05 +020080 netif_carrier_off(master->dev);
Arvid Brodine9aae562014-07-04 23:36:40 +020081
82 return has_carrier;
Arvid Brodinf4214362013-10-30 21:10:47 +010083}
84
85
Arvid Brodine9aae562014-07-04 23:36:40 +020086static void hsr_check_announce(struct net_device *hsr_dev,
87 unsigned char old_operstate)
Arvid Brodinf4214362013-10-30 21:10:47 +010088{
Arvid Brodin70ebe4a2014-07-04 23:34:38 +020089 struct hsr_priv *hsr;
Arvid Brodinf4214362013-10-30 21:10:47 +010090
Arvid Brodin70ebe4a2014-07-04 23:34:38 +020091 hsr = netdev_priv(hsr_dev);
Arvid Brodinf4214362013-10-30 21:10:47 +010092
93 if ((hsr_dev->operstate == IF_OPER_UP) && (old_operstate != IF_OPER_UP)) {
94 /* Went up */
Arvid Brodin70ebe4a2014-07-04 23:34:38 +020095 hsr->announce_count = 0;
96 hsr->announce_timer.expires = jiffies +
Arvid Brodinf4214362013-10-30 21:10:47 +010097 msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL);
Arvid Brodin70ebe4a2014-07-04 23:34:38 +020098 add_timer(&hsr->announce_timer);
Arvid Brodinf4214362013-10-30 21:10:47 +010099 }
100
101 if ((hsr_dev->operstate != IF_OPER_UP) && (old_operstate == IF_OPER_UP))
102 /* Went down */
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200103 del_timer(&hsr->announce_timer);
Arvid Brodinf4214362013-10-30 21:10:47 +0100104}
105
Arvid Brodine9aae562014-07-04 23:36:40 +0200106void hsr_check_carrier_and_operstate(struct hsr_priv *hsr)
107{
Arvid Brodinc5a75912014-07-04 23:38:05 +0200108 struct hsr_port *master;
Arvid Brodine9aae562014-07-04 23:36:40 +0200109 unsigned char old_operstate;
110 bool has_carrier;
111
Arvid Brodinc5a75912014-07-04 23:38:05 +0200112 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
Arvid Brodine9aae562014-07-04 23:36:40 +0200113 /* netif_stacked_transfer_operstate() cannot be used here since
114 * it doesn't set IF_OPER_LOWERLAYERDOWN (?)
115 */
Arvid Brodinc5a75912014-07-04 23:38:05 +0200116 old_operstate = master->dev->operstate;
117 has_carrier = hsr_check_carrier(master);
118 hsr_set_operstate(master, has_carrier);
119 hsr_check_announce(master->dev, old_operstate);
Arvid Brodine9aae562014-07-04 23:36:40 +0200120}
121
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200122int hsr_get_max_mtu(struct hsr_priv *hsr)
Arvid Brodinf4214362013-10-30 21:10:47 +0100123{
Arvid Brodin51f3c602014-07-04 23:37:27 +0200124 unsigned int mtu_max;
Arvid Brodinc5a75912014-07-04 23:38:05 +0200125 struct hsr_port *port;
Arvid Brodinf4214362013-10-30 21:10:47 +0100126
Arvid Brodin51f3c602014-07-04 23:37:27 +0200127 mtu_max = ETH_DATA_LEN;
128 rcu_read_lock();
Arvid Brodinc5a75912014-07-04 23:38:05 +0200129 hsr_for_each_port(hsr, port)
130 if (port->type != HSR_PT_MASTER)
131 mtu_max = min(port->dev->mtu, mtu_max);
Arvid Brodin51f3c602014-07-04 23:37:27 +0200132 rcu_read_unlock();
Arvid Brodinf4214362013-10-30 21:10:47 +0100133
Arvid Brodin51f3c602014-07-04 23:37:27 +0200134 if (mtu_max < HSR_HLEN)
135 return 0;
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200136 return mtu_max - HSR_HLEN;
Arvid Brodinf4214362013-10-30 21:10:47 +0100137}
138
Arvid Brodin51f3c602014-07-04 23:37:27 +0200139
Arvid Brodinf4214362013-10-30 21:10:47 +0100140static int hsr_dev_change_mtu(struct net_device *dev, int new_mtu)
141{
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200142 struct hsr_priv *hsr;
Arvid Brodinc5a75912014-07-04 23:38:05 +0200143 struct hsr_port *master;
Arvid Brodinf4214362013-10-30 21:10:47 +0100144
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200145 hsr = netdev_priv(dev);
Arvid Brodinc5a75912014-07-04 23:38:05 +0200146 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
Arvid Brodinf4214362013-10-30 21:10:47 +0100147
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200148 if (new_mtu > hsr_get_max_mtu(hsr)) {
Arvid Brodinc5a75912014-07-04 23:38:05 +0200149 netdev_info(master->dev, "A HSR master's MTU cannot be greater than the smallest MTU of its slaves minus the HSR Tag length (%d octets).\n",
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200150 HSR_HLEN);
Arvid Brodinf4214362013-10-30 21:10:47 +0100151 return -EINVAL;
152 }
153
154 dev->mtu = new_mtu;
155
156 return 0;
157}
158
159static int hsr_dev_open(struct net_device *dev)
160{
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200161 struct hsr_priv *hsr;
Arvid Brodinc5a75912014-07-04 23:38:05 +0200162 struct hsr_port *port;
163 char designation;
Arvid Brodinf4214362013-10-30 21:10:47 +0100164
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200165 hsr = netdev_priv(dev);
Arvid Brodinc5a75912014-07-04 23:38:05 +0200166 designation = '\0';
Arvid Brodinf4214362013-10-30 21:10:47 +0100167
Arvid Brodinc5a75912014-07-04 23:38:05 +0200168 rcu_read_lock();
169 hsr_for_each_port(hsr, port) {
170 if (port->type == HSR_PT_MASTER)
171 continue;
172 switch (port->type) {
173 case HSR_PT_SLAVE_A:
174 designation = 'A';
175 break;
176 case HSR_PT_SLAVE_B:
177 designation = 'B';
178 break;
179 default:
180 designation = '?';
181 }
182 if (!is_slave_up(port->dev))
183 netdev_warn(dev, "Slave %c (%s) is not up; please bring it up to get a fully working HSR network\n",
184 designation, port->dev->name);
Arvid Brodinf4214362013-10-30 21:10:47 +0100185 }
Arvid Brodinc5a75912014-07-04 23:38:05 +0200186 rcu_read_unlock();
187
188 if (designation == '\0')
189 netdev_warn(dev, "No slave devices configured\n");
Arvid Brodinf4214362013-10-30 21:10:47 +0100190
191 return 0;
192}
193
Arvid Brodinc5a75912014-07-04 23:38:05 +0200194
Arvid Brodinf4214362013-10-30 21:10:47 +0100195static int hsr_dev_close(struct net_device *dev)
196{
Arvid Brodinc5a75912014-07-04 23:38:05 +0200197 /* Nothing to do here. */
Arvid Brodinf4214362013-10-30 21:10:47 +0100198 return 0;
199}
200
201
Arvid Brodin1cc1eb52014-07-04 23:38:57 +0200202static netdev_features_t hsr_features_recompute(struct hsr_priv *hsr,
203 netdev_features_t features)
204{
205 netdev_features_t mask;
206 struct hsr_port *port;
207
208 mask = features;
209
210 /* Mask out all features that, if supported by one device, should be
211 * enabled for all devices (see NETIF_F_ONE_FOR_ALL).
212 *
213 * Anything that's off in mask will not be enabled - so only things
214 * that were in features originally, and also is in NETIF_F_ONE_FOR_ALL,
215 * may become enabled.
216 */
217 features &= ~NETIF_F_ONE_FOR_ALL;
218 hsr_for_each_port(hsr, port)
219 features = netdev_increment_features(features,
220 port->dev->features,
221 mask);
222
223 return features;
224}
225
226static netdev_features_t hsr_fix_features(struct net_device *dev,
227 netdev_features_t features)
228{
229 struct hsr_priv *hsr = netdev_priv(dev);
230
231 return hsr_features_recompute(hsr, features);
232}
233
234
Arvid Brodinf4214362013-10-30 21:10:47 +0100235static int hsr_dev_xmit(struct sk_buff *skb, struct net_device *dev)
236{
Arvid Brodinf266a682014-07-04 23:41:03 +0200237 struct hsr_priv *hsr = netdev_priv(dev);
Arvid Brodinc5a75912014-07-04 23:38:05 +0200238 struct hsr_port *master;
Arvid Brodinf4214362013-10-30 21:10:47 +0100239
Arvid Brodinc5a75912014-07-04 23:38:05 +0200240 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
Arvid Brodinf266a682014-07-04 23:41:03 +0200241 skb->dev = master->dev;
242 hsr_forward_skb(skb, master);
Arvid Brodinf4214362013-10-30 21:10:47 +0100243
244 return NETDEV_TX_OK;
245}
246
247
Arvid Brodinf4214362013-10-30 21:10:47 +0100248static const struct header_ops hsr_header_ops = {
Arvid Brodinf266a682014-07-04 23:41:03 +0200249 .create = eth_header,
Arvid Brodinf4214362013-10-30 21:10:47 +0100250 .parse = eth_header_parse,
251};
252
253
254/* HSR:2010 supervision frames should be padded so that the whole frame,
255 * including headers and FCS, is 64 bytes (without VLAN).
256 */
257static int hsr_pad(int size)
258{
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200259 const int min_size = ETH_ZLEN - HSR_HLEN - ETH_HLEN;
Arvid Brodinf4214362013-10-30 21:10:47 +0100260
261 if (size >= min_size)
262 return size;
263 return min_size;
264}
265
Arvid Brodinf266a682014-07-04 23:41:03 +0200266static void send_hsr_supervision_frame(struct hsr_port *master, u8 type)
Arvid Brodinf4214362013-10-30 21:10:47 +0100267{
Arvid Brodinf4214362013-10-30 21:10:47 +0100268 struct sk_buff *skb;
269 int hlen, tlen;
270 struct hsr_sup_tag *hsr_stag;
271 struct hsr_sup_payload *hsr_sp;
272 unsigned long irqflags;
Arvid Brodinc5a75912014-07-04 23:38:05 +0200273
274 hlen = LL_RESERVED_SPACE(master->dev);
275 tlen = master->dev->needed_tailroom;
Arvid Brodinf4214362013-10-30 21:10:47 +0100276 skb = alloc_skb(hsr_pad(sizeof(struct hsr_sup_payload)) + hlen + tlen,
277 GFP_ATOMIC);
278
279 if (skb == NULL)
280 return;
281
Arvid Brodinf4214362013-10-30 21:10:47 +0100282 skb_reserve(skb, hlen);
283
Arvid Brodinc5a75912014-07-04 23:38:05 +0200284 skb->dev = master->dev;
Arvid Brodinf4214362013-10-30 21:10:47 +0100285 skb->protocol = htons(ETH_P_PRP);
286 skb->priority = TC_PRIO_CONTROL;
287
Arvid Brodinf266a682014-07-04 23:41:03 +0200288 if (dev_hard_header(skb, skb->dev, ETH_P_PRP,
289 master->hsr->sup_multicast_addr,
290 skb->dev->dev_addr, skb->len) <= 0)
Arvid Brodinf4214362013-10-30 21:10:47 +0100291 goto out;
Arvid Brodinf266a682014-07-04 23:41:03 +0200292 skb_reset_mac_header(skb);
Arvid Brodinf4214362013-10-30 21:10:47 +0100293
Arvid Brodinf266a682014-07-04 23:41:03 +0200294 hsr_stag = (typeof(hsr_stag)) skb_put(skb, sizeof(*hsr_stag));
Arvid Brodinf4214362013-10-30 21:10:47 +0100295
296 set_hsr_stag_path(hsr_stag, 0xf);
297 set_hsr_stag_HSR_Ver(hsr_stag, 0);
298
Arvid Brodinf266a682014-07-04 23:41:03 +0200299 spin_lock_irqsave(&master->hsr->seqnr_lock, irqflags);
300 hsr_stag->sequence_nr = htons(master->hsr->sequence_nr);
301 master->hsr->sequence_nr++;
302 spin_unlock_irqrestore(&master->hsr->seqnr_lock, irqflags);
Arvid Brodinf4214362013-10-30 21:10:47 +0100303
304 hsr_stag->HSR_TLV_Type = type;
305 hsr_stag->HSR_TLV_Length = 12;
306
Arvid Brodinf4214362013-10-30 21:10:47 +0100307 /* Payload: MacAddressA */
308 hsr_sp = (typeof(hsr_sp)) skb_put(skb, sizeof(*hsr_sp));
Arvid Brodinc5a75912014-07-04 23:38:05 +0200309 ether_addr_copy(hsr_sp->MacAddressA, master->dev->dev_addr);
Arvid Brodinf4214362013-10-30 21:10:47 +0100310
Arvid Brodinf266a682014-07-04 23:41:03 +0200311 hsr_forward_skb(skb, master);
Arvid Brodinf4214362013-10-30 21:10:47 +0100312 return;
313
314out:
Dan Carpenter3d1a54e2015-11-21 13:34:12 +0300315 WARN_ONCE(1, "HSR: Could not send supervision frame\n");
Arvid Brodinf4214362013-10-30 21:10:47 +0100316 kfree_skb(skb);
317}
318
319
320/* Announce (supervision frame) timer function
321 */
322static void hsr_announce(unsigned long data)
323{
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200324 struct hsr_priv *hsr;
Arvid Brodinc5a75912014-07-04 23:38:05 +0200325 struct hsr_port *master;
Arvid Brodinf4214362013-10-30 21:10:47 +0100326
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200327 hsr = (struct hsr_priv *) data;
Arvid Brodinf266a682014-07-04 23:41:03 +0200328
329 rcu_read_lock();
Arvid Brodinc5a75912014-07-04 23:38:05 +0200330 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
Arvid Brodinf4214362013-10-30 21:10:47 +0100331
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200332 if (hsr->announce_count < 3) {
Arvid Brodinf266a682014-07-04 23:41:03 +0200333 send_hsr_supervision_frame(master, HSR_TLV_ANNOUNCE);
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200334 hsr->announce_count++;
Arvid Brodinf4214362013-10-30 21:10:47 +0100335 } else {
Arvid Brodinf266a682014-07-04 23:41:03 +0200336 send_hsr_supervision_frame(master, HSR_TLV_LIFE_CHECK);
Arvid Brodinf4214362013-10-30 21:10:47 +0100337 }
338
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200339 if (hsr->announce_count < 3)
340 hsr->announce_timer.expires = jiffies +
Arvid Brodinf4214362013-10-30 21:10:47 +0100341 msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL);
342 else
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200343 hsr->announce_timer.expires = jiffies +
Arvid Brodinf4214362013-10-30 21:10:47 +0100344 msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL);
345
Arvid Brodinc5a75912014-07-04 23:38:05 +0200346 if (is_admin_up(master->dev))
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200347 add_timer(&hsr->announce_timer);
Arvid Brodinf266a682014-07-04 23:41:03 +0200348
349 rcu_read_unlock();
Arvid Brodinf4214362013-10-30 21:10:47 +0100350}
351
352
Arvid Brodinf4214362013-10-30 21:10:47 +0100353/* According to comments in the declaration of struct net_device, this function
354 * is "Called from unregister, can be used to call free_netdev". Ok then...
355 */
356static void hsr_dev_destroy(struct net_device *hsr_dev)
357{
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200358 struct hsr_priv *hsr;
Arvid Brodinc5a75912014-07-04 23:38:05 +0200359 struct hsr_port *port;
Arvid Brodinf4214362013-10-30 21:10:47 +0100360
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200361 hsr = netdev_priv(hsr_dev);
Arvid Brodin56b08fd2015-02-27 21:26:03 +0100362
363 rtnl_lock();
Arvid Brodinc5a75912014-07-04 23:38:05 +0200364 hsr_for_each_port(hsr, port)
365 hsr_del_port(port);
Arvid Brodin56b08fd2015-02-27 21:26:03 +0100366 rtnl_unlock();
Arvid Brodinf4214362013-10-30 21:10:47 +0100367
Arvid Brodinabff7162014-07-04 23:35:47 +0200368 del_timer_sync(&hsr->prune_timer);
369 del_timer_sync(&hsr->announce_timer);
Arvid Brodinc5a75912014-07-04 23:38:05 +0200370
371 synchronize_rcu();
372 free_netdev(hsr_dev);
Arvid Brodinf4214362013-10-30 21:10:47 +0100373}
374
375static const struct net_device_ops hsr_device_ops = {
376 .ndo_change_mtu = hsr_dev_change_mtu,
377 .ndo_open = hsr_dev_open,
378 .ndo_stop = hsr_dev_close,
379 .ndo_start_xmit = hsr_dev_xmit,
Arvid Brodin1cc1eb52014-07-04 23:38:57 +0200380 .ndo_fix_features = hsr_fix_features,
Arvid Brodinf4214362013-10-30 21:10:47 +0100381};
382
Arvid Brodin4c3477d2014-07-04 23:39:42 +0200383static struct device_type hsr_type = {
384 .name = "hsr",
385};
Arvid Brodinf4214362013-10-30 21:10:47 +0100386
387void hsr_dev_setup(struct net_device *dev)
388{
389 random_ether_addr(dev->dev_addr);
390
391 ether_setup(dev);
Arvid Brodin4c3477d2014-07-04 23:39:42 +0200392 dev->header_ops = &hsr_header_ops;
393 dev->netdev_ops = &hsr_device_ops;
394 SET_NETDEV_DEVTYPE(dev, &hsr_type);
Phil Sutter9ad09c52015-08-18 10:30:45 +0200395 dev->priv_flags |= IFF_NO_QUEUE;
Arvid Brodinf4214362013-10-30 21:10:47 +0100396
397 dev->destructor = hsr_dev_destroy;
Arvid Brodin1cc1eb52014-07-04 23:38:57 +0200398
399 dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
400 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM |
401 NETIF_F_HW_VLAN_CTAG_TX;
402
403 dev->features = dev->hw_features;
404
405 /* Prevent recursive tx locking */
406 dev->features |= NETIF_F_LLTX;
407 /* VLAN on top of HSR needs testing and probably some work on
408 * hsr_header_create() etc.
409 */
410 dev->features |= NETIF_F_VLAN_CHALLENGED;
Arvid Brodin4c3477d2014-07-04 23:39:42 +0200411 /* Not sure about this. Taken from bridge code. netdev_features.h says
412 * it means "Does not change network namespaces".
413 */
414 dev->features |= NETIF_F_NETNS_LOCAL;
Arvid Brodinf4214362013-10-30 21:10:47 +0100415}
416
417
418/* Return true if dev is a HSR master; return false otherwise.
419 */
Arvid Brodinc5a75912014-07-04 23:38:05 +0200420inline bool is_hsr_master(struct net_device *dev)
Arvid Brodinf4214362013-10-30 21:10:47 +0100421{
422 return (dev->netdev_ops->ndo_start_xmit == hsr_dev_xmit);
423}
424
Arvid Brodinf4214362013-10-30 21:10:47 +0100425/* Default multicast address for HSR Supervision frames */
Joe Perchese83abe32014-02-18 10:37:20 -0800426static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = {
Arvid Brodinf4214362013-10-30 21:10:47 +0100427 0x01, 0x15, 0x4e, 0x00, 0x01, 0x00
428};
429
430int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
431 unsigned char multicast_spec)
432{
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200433 struct hsr_priv *hsr;
Arvid Brodinc5a75912014-07-04 23:38:05 +0200434 struct hsr_port *port;
Arvid Brodinf4214362013-10-30 21:10:47 +0100435 int res;
436
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200437 hsr = netdev_priv(hsr_dev);
Arvid Brodinc5a75912014-07-04 23:38:05 +0200438 INIT_LIST_HEAD(&hsr->ports);
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200439 INIT_LIST_HEAD(&hsr->node_db);
440 INIT_LIST_HEAD(&hsr->self_node_db);
Arvid Brodin51f3c602014-07-04 23:37:27 +0200441
442 ether_addr_copy(hsr_dev->dev_addr, slave[0]->dev_addr);
443
444 /* Make sure we recognize frames from ourselves in hsr_rcv() */
445 res = hsr_create_self_node(&hsr->self_node_db, hsr_dev->dev_addr,
446 slave[1]->dev_addr);
447 if (res < 0)
448 return res;
449
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200450 spin_lock_init(&hsr->seqnr_lock);
Arvid Brodinf4214362013-10-30 21:10:47 +0100451 /* Overflow soon to find bugs easier: */
Arvid Brodinf266a682014-07-04 23:41:03 +0200452 hsr->sequence_nr = HSR_SEQNR_START;
Arvid Brodinf4214362013-10-30 21:10:47 +0100453
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200454 init_timer(&hsr->announce_timer);
455 hsr->announce_timer.function = hsr_announce;
456 hsr->announce_timer.data = (unsigned long) hsr;
Arvid Brodinf4214362013-10-30 21:10:47 +0100457
Arvid Brodinabff7162014-07-04 23:35:47 +0200458 init_timer(&hsr->prune_timer);
459 hsr->prune_timer.function = hsr_prune_nodes;
460 hsr->prune_timer.data = (unsigned long) hsr;
461
Arvid Brodin70ebe4a2014-07-04 23:34:38 +0200462 ether_addr_copy(hsr->sup_multicast_addr, def_multicast_addr);
463 hsr->sup_multicast_addr[ETH_ALEN - 1] = multicast_spec;
Arvid Brodinf4214362013-10-30 21:10:47 +0100464
Arvid Brodinc5a75912014-07-04 23:38:05 +0200465 /* FIXME: should I modify the value of these?
466 *
467 * - hsr_dev->flags - i.e.
468 * IFF_MASTER/SLAVE?
469 * - hsr_dev->priv_flags - i.e.
470 * IFF_EBRIDGE?
471 * IFF_TX_SKB_SHARING?
472 * IFF_HSR_MASTER/SLAVE?
473 */
Arvid Brodinf4214362013-10-30 21:10:47 +0100474
Arvid Brodinf4214362013-10-30 21:10:47 +0100475 /* Make sure the 1st call to netif_carrier_on() gets through */
476 netif_carrier_off(hsr_dev);
477
Arvid Brodinc5a75912014-07-04 23:38:05 +0200478 res = hsr_add_port(hsr, hsr_dev, HSR_PT_MASTER);
Arvid Brodinf4214362013-10-30 21:10:47 +0100479 if (res)
Arvid Brodin51f3c602014-07-04 23:37:27 +0200480 return res;
481
Arvid Brodinc5a75912014-07-04 23:38:05 +0200482 res = register_netdevice(hsr_dev);
Arvid Brodin51f3c602014-07-04 23:37:27 +0200483 if (res)
Arvid Brodinc5a75912014-07-04 23:38:05 +0200484 goto fail;
485
486 res = hsr_add_port(hsr, slave[0], HSR_PT_SLAVE_A);
487 if (res)
488 goto fail;
489 res = hsr_add_port(hsr, slave[1], HSR_PT_SLAVE_B);
490 if (res)
491 goto fail;
Arvid Brodinf4214362013-10-30 21:10:47 +0100492
Arvid Brodinabff7162014-07-04 23:35:47 +0200493 hsr->prune_timer.expires = jiffies + msecs_to_jiffies(PRUNE_PERIOD);
494 add_timer(&hsr->prune_timer);
495
Arvid Brodinf4214362013-10-30 21:10:47 +0100496 return 0;
Arvid Brodinc5a75912014-07-04 23:38:05 +0200497
498fail:
499 hsr_for_each_port(hsr, port)
500 hsr_del_port(port);
501
502 return res;
Arvid Brodinf4214362013-10-30 21:10:47 +0100503}