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70ebe4a4 | 1 | /* Copyright 2011-2014 Autronica Fire and Security AS |
f421436a AB |
2 | * |
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): | |
70ebe4a4 | 9 | * 2011-2014 Arvid Brodin, arvid.brodin@alten.se |
f421436a AB |
10 | * |
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> | |
f421436a AB |
18 | #include <linux/rtnetlink.h> |
19 | #include <linux/pkt_sched.h> | |
20 | #include "hsr_device.h" | |
81ba6afd | 21 | #include "hsr_slave.h" |
f421436a AB |
22 | #include "hsr_framereg.h" |
23 | #include "hsr_main.h" | |
24 | ||
25 | ||
26 | static bool is_admin_up(struct net_device *dev) | |
27 | { | |
28 | return dev && (dev->flags & IFF_UP); | |
29 | } | |
30 | ||
31 | static bool is_slave_up(struct net_device *dev) | |
32 | { | |
33 | return dev && is_admin_up(dev) && netif_oper_up(dev); | |
34 | } | |
35 | ||
36 | static void __hsr_set_operstate(struct net_device *dev, int transition) | |
37 | { | |
38 | write_lock_bh(&dev_base_lock); | |
39 | if (dev->operstate != transition) { | |
40 | dev->operstate = transition; | |
41 | write_unlock_bh(&dev_base_lock); | |
42 | netdev_state_change(dev); | |
43 | } else { | |
44 | write_unlock_bh(&dev_base_lock); | |
45 | } | |
46 | } | |
47 | ||
e9aae56e | 48 | static void hsr_set_operstate(struct net_device *hsr_dev, bool has_carrier) |
f421436a AB |
49 | { |
50 | if (!is_admin_up(hsr_dev)) { | |
51 | __hsr_set_operstate(hsr_dev, IF_OPER_DOWN); | |
52 | return; | |
53 | } | |
54 | ||
e9aae56e | 55 | if (has_carrier) |
f421436a AB |
56 | __hsr_set_operstate(hsr_dev, IF_OPER_UP); |
57 | else | |
58 | __hsr_set_operstate(hsr_dev, IF_OPER_LOWERLAYERDOWN); | |
59 | } | |
60 | ||
e9aae56e | 61 | static bool hsr_check_carrier(struct hsr_priv *hsr) |
f421436a | 62 | { |
e9aae56e AB |
63 | bool has_carrier; |
64 | ||
65 | has_carrier = (is_slave_up(hsr->slave[0]) || is_slave_up(hsr->slave[1])); | |
66 | ||
67 | if (has_carrier) | |
68 | netif_carrier_on(hsr->dev); | |
f421436a | 69 | else |
e9aae56e AB |
70 | netif_carrier_off(hsr->dev); |
71 | ||
72 | return has_carrier; | |
f421436a AB |
73 | } |
74 | ||
75 | ||
e9aae56e AB |
76 | static void hsr_check_announce(struct net_device *hsr_dev, |
77 | unsigned char old_operstate) | |
f421436a | 78 | { |
70ebe4a4 | 79 | struct hsr_priv *hsr; |
f421436a | 80 | |
70ebe4a4 | 81 | hsr = netdev_priv(hsr_dev); |
f421436a AB |
82 | |
83 | if ((hsr_dev->operstate == IF_OPER_UP) && (old_operstate != IF_OPER_UP)) { | |
84 | /* Went up */ | |
70ebe4a4 AB |
85 | hsr->announce_count = 0; |
86 | hsr->announce_timer.expires = jiffies + | |
f421436a | 87 | msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL); |
70ebe4a4 | 88 | add_timer(&hsr->announce_timer); |
f421436a AB |
89 | } |
90 | ||
91 | if ((hsr_dev->operstate != IF_OPER_UP) && (old_operstate == IF_OPER_UP)) | |
92 | /* Went down */ | |
70ebe4a4 | 93 | del_timer(&hsr->announce_timer); |
f421436a AB |
94 | } |
95 | ||
e9aae56e AB |
96 | void hsr_check_carrier_and_operstate(struct hsr_priv *hsr) |
97 | { | |
98 | unsigned char old_operstate; | |
99 | bool has_carrier; | |
100 | ||
101 | /* netif_stacked_transfer_operstate() cannot be used here since | |
102 | * it doesn't set IF_OPER_LOWERLAYERDOWN (?) | |
103 | */ | |
104 | old_operstate = hsr->dev->operstate; | |
105 | has_carrier = hsr_check_carrier(hsr); | |
106 | hsr_set_operstate(hsr->dev, has_carrier); | |
107 | hsr_check_announce(hsr->dev, old_operstate); | |
108 | } | |
109 | ||
70ebe4a4 | 110 | int hsr_get_max_mtu(struct hsr_priv *hsr) |
f421436a | 111 | { |
51f3c605 AB |
112 | unsigned int mtu_max; |
113 | struct net_device *slave; | |
114 | ||
115 | mtu_max = ETH_DATA_LEN; | |
116 | rcu_read_lock(); | |
117 | slave = hsr->slave[0]; | |
118 | if (slave) | |
119 | mtu_max = min(slave->mtu, mtu_max); | |
120 | slave = hsr->slave[1]; | |
121 | if (slave) | |
122 | mtu_max = min(slave->mtu, mtu_max); | |
123 | rcu_read_unlock(); | |
124 | ||
125 | if (mtu_max < HSR_HLEN) | |
126 | return 0; | |
70ebe4a4 | 127 | return mtu_max - HSR_HLEN; |
f421436a AB |
128 | } |
129 | ||
51f3c605 | 130 | |
f421436a AB |
131 | static int hsr_dev_change_mtu(struct net_device *dev, int new_mtu) |
132 | { | |
70ebe4a4 | 133 | struct hsr_priv *hsr; |
f421436a | 134 | |
70ebe4a4 | 135 | hsr = netdev_priv(dev); |
f421436a | 136 | |
70ebe4a4 AB |
137 | if (new_mtu > hsr_get_max_mtu(hsr)) { |
138 | netdev_info(hsr->dev, "A HSR master's MTU cannot be greater than the smallest MTU of its slaves minus the HSR Tag length (%d octets).\n", | |
139 | HSR_HLEN); | |
f421436a AB |
140 | return -EINVAL; |
141 | } | |
142 | ||
143 | dev->mtu = new_mtu; | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | static int hsr_dev_open(struct net_device *dev) | |
149 | { | |
70ebe4a4 | 150 | struct hsr_priv *hsr; |
51f3c605 | 151 | struct net_device *slave; |
f421436a AB |
152 | int i; |
153 | char *slave_name; | |
154 | ||
70ebe4a4 | 155 | hsr = netdev_priv(dev); |
f421436a AB |
156 | |
157 | for (i = 0; i < HSR_MAX_SLAVE; i++) { | |
51f3c605 AB |
158 | slave = hsr->slave[i]; |
159 | if (slave) | |
160 | slave_name = slave->name; | |
f421436a AB |
161 | else |
162 | slave_name = "null"; | |
163 | ||
51f3c605 | 164 | if (!is_slave_up(slave)) |
f421436a AB |
165 | netdev_warn(dev, "Slave %c (%s) is not up; please bring it up to get a working HSR network\n", |
166 | 'A' + i, slave_name); | |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static int hsr_dev_close(struct net_device *dev) | |
173 | { | |
174 | /* Nothing to do here. We could try to restore the state of the slaves | |
175 | * to what they were before being changed by the hsr master dev's state, | |
176 | * but they might have been changed manually in the mean time too, so | |
177 | * taking them up or down here might be confusing and is probably not a | |
178 | * good idea. | |
179 | */ | |
180 | return 0; | |
181 | } | |
182 | ||
183 | ||
70ebe4a4 | 184 | static void hsr_fill_tag(struct hsr_ethhdr *hsr_ethhdr, struct hsr_priv *hsr) |
f421436a AB |
185 | { |
186 | unsigned long irqflags; | |
187 | ||
188 | /* IEC 62439-1:2010, p 48, says the 4-bit "path" field can take values | |
189 | * between 0001-1001 ("ring identifier", for regular HSR frames), | |
190 | * or 1111 ("HSR management", supervision frames). Unfortunately, the | |
191 | * spec writers forgot to explain what a "ring identifier" is, or | |
192 | * how it is used. So we just set this to 0001 for regular frames, | |
193 | * and 1111 for supervision frames. | |
194 | */ | |
195 | set_hsr_tag_path(&hsr_ethhdr->hsr_tag, 0x1); | |
196 | ||
197 | /* IEC 62439-1:2010, p 12: "The link service data unit in an Ethernet | |
198 | * frame is the content of the frame located between the Length/Type | |
199 | * field and the Frame Check Sequence." | |
200 | * | |
201 | * IEC 62439-3, p 48, specifies the "original LPDU" to include the | |
202 | * original "LT" field (what "LT" means is not explained anywhere as | |
203 | * far as I can see - perhaps "Length/Type"?). So LSDU_size might | |
204 | * equal original length + 2. | |
205 | * Also, the fact that this field is not used anywhere (might be used | |
206 | * by a RedBox connecting HSR and PRP nets?) means I cannot test its | |
207 | * correctness. Instead of guessing, I set this to 0 here, to make any | |
208 | * problems immediately apparent. Anyone using this driver with PRP/HSR | |
209 | * RedBoxes might need to fix this... | |
210 | */ | |
211 | set_hsr_tag_LSDU_size(&hsr_ethhdr->hsr_tag, 0); | |
212 | ||
70ebe4a4 AB |
213 | spin_lock_irqsave(&hsr->seqnr_lock, irqflags); |
214 | hsr_ethhdr->hsr_tag.sequence_nr = htons(hsr->sequence_nr); | |
215 | hsr->sequence_nr++; | |
216 | spin_unlock_irqrestore(&hsr->seqnr_lock, irqflags); | |
f421436a AB |
217 | |
218 | hsr_ethhdr->hsr_tag.encap_proto = hsr_ethhdr->ethhdr.h_proto; | |
219 | ||
220 | hsr_ethhdr->ethhdr.h_proto = htons(ETH_P_PRP); | |
221 | } | |
222 | ||
70ebe4a4 | 223 | static int slave_xmit(struct sk_buff *skb, struct hsr_priv *hsr, |
f421436a AB |
224 | enum hsr_dev_idx dev_idx) |
225 | { | |
226 | struct hsr_ethhdr *hsr_ethhdr; | |
227 | ||
228 | hsr_ethhdr = (struct hsr_ethhdr *) skb->data; | |
229 | ||
70ebe4a4 | 230 | skb->dev = hsr->slave[dev_idx]; |
51f3c605 AB |
231 | if (unlikely(!skb->dev)) |
232 | return NET_XMIT_DROP; | |
f421436a | 233 | |
70ebe4a4 | 234 | hsr_addr_subst_dest(hsr, &hsr_ethhdr->ethhdr, dev_idx); |
f421436a AB |
235 | |
236 | /* Address substitution (IEC62439-3 pp 26, 50): replace mac | |
237 | * address of outgoing frame with that of the outgoing slave's. | |
238 | */ | |
e83abe37 | 239 | ether_addr_copy(hsr_ethhdr->ethhdr.h_source, skb->dev->dev_addr); |
f421436a AB |
240 | |
241 | return dev_queue_xmit(skb); | |
242 | } | |
243 | ||
244 | ||
245 | static int hsr_dev_xmit(struct sk_buff *skb, struct net_device *dev) | |
246 | { | |
70ebe4a4 | 247 | struct hsr_priv *hsr; |
f421436a AB |
248 | struct hsr_ethhdr *hsr_ethhdr; |
249 | struct sk_buff *skb2; | |
250 | int res1, res2; | |
251 | ||
70ebe4a4 | 252 | hsr = netdev_priv(dev); |
f421436a AB |
253 | hsr_ethhdr = (struct hsr_ethhdr *) skb->data; |
254 | ||
255 | if ((skb->protocol != htons(ETH_P_PRP)) || | |
256 | (hsr_ethhdr->ethhdr.h_proto != htons(ETH_P_PRP))) { | |
70ebe4a4 | 257 | hsr_fill_tag(hsr_ethhdr, hsr); |
f421436a AB |
258 | skb->protocol = htons(ETH_P_PRP); |
259 | } | |
260 | ||
261 | skb2 = pskb_copy(skb, GFP_ATOMIC); | |
51f3c605 AB |
262 | res1 = slave_xmit(skb, hsr, HSR_DEV_SLAVE_A); |
263 | res2 = slave_xmit(skb2, hsr, HSR_DEV_SLAVE_B); | |
f421436a AB |
264 | |
265 | if (likely(res1 == NET_XMIT_SUCCESS || res1 == NET_XMIT_CN || | |
266 | res2 == NET_XMIT_SUCCESS || res2 == NET_XMIT_CN)) { | |
70ebe4a4 AB |
267 | hsr->dev->stats.tx_packets++; |
268 | hsr->dev->stats.tx_bytes += skb->len; | |
f421436a | 269 | } else { |
70ebe4a4 | 270 | hsr->dev->stats.tx_dropped++; |
f421436a AB |
271 | } |
272 | ||
273 | return NETDEV_TX_OK; | |
274 | } | |
275 | ||
276 | ||
277 | static int hsr_header_create(struct sk_buff *skb, struct net_device *dev, | |
278 | unsigned short type, const void *daddr, | |
279 | const void *saddr, unsigned int len) | |
280 | { | |
281 | int res; | |
282 | ||
283 | /* Make room for the HSR tag now. We will fill it in later (in | |
284 | * hsr_dev_xmit) | |
285 | */ | |
70ebe4a4 | 286 | if (skb_headroom(skb) < HSR_HLEN + ETH_HLEN) |
f421436a | 287 | return -ENOBUFS; |
70ebe4a4 | 288 | skb_push(skb, HSR_HLEN); |
f421436a AB |
289 | |
290 | /* To allow VLAN/HSR combos we should probably use | |
70ebe4a4 | 291 | * res = dev_hard_header(skb, dev, type, daddr, saddr, len + HSR_HLEN); |
f421436a AB |
292 | * here instead. It would require other changes too, though - e.g. |
293 | * separate headers for each slave etc... | |
294 | */ | |
70ebe4a4 | 295 | res = eth_header(skb, dev, type, daddr, saddr, len + HSR_HLEN); |
f421436a AB |
296 | if (res <= 0) |
297 | return res; | |
298 | skb_reset_mac_header(skb); | |
299 | ||
70ebe4a4 | 300 | return res + HSR_HLEN; |
f421436a AB |
301 | } |
302 | ||
303 | ||
304 | static const struct header_ops hsr_header_ops = { | |
305 | .create = hsr_header_create, | |
306 | .parse = eth_header_parse, | |
307 | }; | |
308 | ||
309 | ||
310 | /* HSR:2010 supervision frames should be padded so that the whole frame, | |
311 | * including headers and FCS, is 64 bytes (without VLAN). | |
312 | */ | |
313 | static int hsr_pad(int size) | |
314 | { | |
70ebe4a4 | 315 | const int min_size = ETH_ZLEN - HSR_HLEN - ETH_HLEN; |
f421436a AB |
316 | |
317 | if (size >= min_size) | |
318 | return size; | |
319 | return min_size; | |
320 | } | |
321 | ||
322 | static void send_hsr_supervision_frame(struct net_device *hsr_dev, u8 type) | |
323 | { | |
70ebe4a4 | 324 | struct hsr_priv *hsr; |
f421436a AB |
325 | struct sk_buff *skb; |
326 | int hlen, tlen; | |
327 | struct hsr_sup_tag *hsr_stag; | |
328 | struct hsr_sup_payload *hsr_sp; | |
329 | unsigned long irqflags; | |
330 | ||
331 | hlen = LL_RESERVED_SPACE(hsr_dev); | |
332 | tlen = hsr_dev->needed_tailroom; | |
333 | skb = alloc_skb(hsr_pad(sizeof(struct hsr_sup_payload)) + hlen + tlen, | |
334 | GFP_ATOMIC); | |
335 | ||
336 | if (skb == NULL) | |
337 | return; | |
338 | ||
70ebe4a4 | 339 | hsr = netdev_priv(hsr_dev); |
f421436a AB |
340 | |
341 | skb_reserve(skb, hlen); | |
342 | ||
343 | skb->dev = hsr_dev; | |
344 | skb->protocol = htons(ETH_P_PRP); | |
345 | skb->priority = TC_PRIO_CONTROL; | |
346 | ||
347 | if (dev_hard_header(skb, skb->dev, ETH_P_PRP, | |
70ebe4a4 | 348 | hsr->sup_multicast_addr, |
f421436a AB |
349 | skb->dev->dev_addr, skb->len) < 0) |
350 | goto out; | |
351 | ||
352 | skb_pull(skb, sizeof(struct ethhdr)); | |
353 | hsr_stag = (typeof(hsr_stag)) skb->data; | |
354 | ||
355 | set_hsr_stag_path(hsr_stag, 0xf); | |
356 | set_hsr_stag_HSR_Ver(hsr_stag, 0); | |
357 | ||
70ebe4a4 AB |
358 | spin_lock_irqsave(&hsr->seqnr_lock, irqflags); |
359 | hsr_stag->sequence_nr = htons(hsr->sequence_nr); | |
360 | hsr->sequence_nr++; | |
361 | spin_unlock_irqrestore(&hsr->seqnr_lock, irqflags); | |
f421436a AB |
362 | |
363 | hsr_stag->HSR_TLV_Type = type; | |
364 | hsr_stag->HSR_TLV_Length = 12; | |
365 | ||
366 | skb_push(skb, sizeof(struct ethhdr)); | |
367 | ||
368 | /* Payload: MacAddressA */ | |
369 | hsr_sp = (typeof(hsr_sp)) skb_put(skb, sizeof(*hsr_sp)); | |
e83abe37 | 370 | ether_addr_copy(hsr_sp->MacAddressA, hsr_dev->dev_addr); |
f421436a AB |
371 | |
372 | dev_queue_xmit(skb); | |
373 | return; | |
374 | ||
375 | out: | |
376 | kfree_skb(skb); | |
377 | } | |
378 | ||
379 | ||
380 | /* Announce (supervision frame) timer function | |
381 | */ | |
382 | static void hsr_announce(unsigned long data) | |
383 | { | |
70ebe4a4 | 384 | struct hsr_priv *hsr; |
f421436a | 385 | |
70ebe4a4 | 386 | hsr = (struct hsr_priv *) data; |
f421436a | 387 | |
70ebe4a4 AB |
388 | if (hsr->announce_count < 3) { |
389 | send_hsr_supervision_frame(hsr->dev, HSR_TLV_ANNOUNCE); | |
390 | hsr->announce_count++; | |
f421436a | 391 | } else { |
70ebe4a4 | 392 | send_hsr_supervision_frame(hsr->dev, HSR_TLV_LIFE_CHECK); |
f421436a AB |
393 | } |
394 | ||
70ebe4a4 AB |
395 | if (hsr->announce_count < 3) |
396 | hsr->announce_timer.expires = jiffies + | |
f421436a AB |
397 | msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL); |
398 | else | |
70ebe4a4 | 399 | hsr->announce_timer.expires = jiffies + |
f421436a AB |
400 | msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL); |
401 | ||
70ebe4a4 AB |
402 | if (is_admin_up(hsr->dev)) |
403 | add_timer(&hsr->announce_timer); | |
f421436a AB |
404 | } |
405 | ||
406 | ||
407 | static void restore_slaves(struct net_device *hsr_dev) | |
408 | { | |
70ebe4a4 | 409 | struct hsr_priv *hsr; |
f421436a | 410 | |
70ebe4a4 | 411 | hsr = netdev_priv(hsr_dev); |
51f3c605 AB |
412 | hsr_del_slave(hsr, 1); |
413 | hsr_del_slave(hsr, 0); | |
f421436a AB |
414 | } |
415 | ||
416 | static void reclaim_hsr_dev(struct rcu_head *rh) | |
417 | { | |
70ebe4a4 | 418 | struct hsr_priv *hsr; |
f421436a | 419 | |
70ebe4a4 AB |
420 | hsr = container_of(rh, struct hsr_priv, rcu_head); |
421 | free_netdev(hsr->dev); | |
f421436a AB |
422 | } |
423 | ||
424 | ||
425 | /* According to comments in the declaration of struct net_device, this function | |
426 | * is "Called from unregister, can be used to call free_netdev". Ok then... | |
427 | */ | |
428 | static void hsr_dev_destroy(struct net_device *hsr_dev) | |
429 | { | |
70ebe4a4 | 430 | struct hsr_priv *hsr; |
f421436a | 431 | |
70ebe4a4 | 432 | hsr = netdev_priv(hsr_dev); |
f421436a | 433 | |
abff7162 AB |
434 | del_timer_sync(&hsr->prune_timer); |
435 | del_timer_sync(&hsr->announce_timer); | |
70ebe4a4 | 436 | unregister_hsr_master(hsr); /* calls list_del_rcu on hsr */ |
f421436a | 437 | restore_slaves(hsr_dev); |
70ebe4a4 | 438 | call_rcu(&hsr->rcu_head, reclaim_hsr_dev); /* reclaim hsr */ |
f421436a AB |
439 | } |
440 | ||
441 | static const struct net_device_ops hsr_device_ops = { | |
442 | .ndo_change_mtu = hsr_dev_change_mtu, | |
443 | .ndo_open = hsr_dev_open, | |
444 | .ndo_stop = hsr_dev_close, | |
445 | .ndo_start_xmit = hsr_dev_xmit, | |
446 | }; | |
447 | ||
448 | ||
449 | void hsr_dev_setup(struct net_device *dev) | |
450 | { | |
451 | random_ether_addr(dev->dev_addr); | |
452 | ||
453 | ether_setup(dev); | |
454 | dev->header_ops = &hsr_header_ops; | |
455 | dev->netdev_ops = &hsr_device_ops; | |
456 | dev->tx_queue_len = 0; | |
457 | ||
458 | dev->destructor = hsr_dev_destroy; | |
459 | } | |
460 | ||
461 | ||
462 | /* Return true if dev is a HSR master; return false otherwise. | |
463 | */ | |
464 | bool is_hsr_master(struct net_device *dev) | |
465 | { | |
466 | return (dev->netdev_ops->ndo_start_xmit == hsr_dev_xmit); | |
467 | } | |
468 | ||
f421436a AB |
469 | |
470 | /* Default multicast address for HSR Supervision frames */ | |
e83abe37 | 471 | static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = { |
f421436a AB |
472 | 0x01, 0x15, 0x4e, 0x00, 0x01, 0x00 |
473 | }; | |
474 | ||
475 | int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2], | |
476 | unsigned char multicast_spec) | |
477 | { | |
70ebe4a4 | 478 | struct hsr_priv *hsr; |
f421436a AB |
479 | int res; |
480 | ||
70ebe4a4 AB |
481 | hsr = netdev_priv(hsr_dev); |
482 | hsr->dev = hsr_dev; | |
51f3c605 AB |
483 | hsr->slave[0] = NULL; |
484 | hsr->slave[1] = NULL; | |
70ebe4a4 AB |
485 | INIT_LIST_HEAD(&hsr->node_db); |
486 | INIT_LIST_HEAD(&hsr->self_node_db); | |
51f3c605 AB |
487 | |
488 | ether_addr_copy(hsr_dev->dev_addr, slave[0]->dev_addr); | |
489 | ||
490 | /* Make sure we recognize frames from ourselves in hsr_rcv() */ | |
491 | res = hsr_create_self_node(&hsr->self_node_db, hsr_dev->dev_addr, | |
492 | slave[1]->dev_addr); | |
493 | if (res < 0) | |
494 | return res; | |
495 | ||
496 | hsr_dev->features = slave[0]->features & slave[1]->features; | |
497 | /* Prevent recursive tx locking */ | |
498 | hsr_dev->features |= NETIF_F_LLTX; | |
499 | /* VLAN on top of HSR needs testing and probably some work on | |
500 | * hsr_header_create() etc. | |
501 | */ | |
502 | hsr_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
f421436a | 503 | |
70ebe4a4 | 504 | spin_lock_init(&hsr->seqnr_lock); |
f421436a | 505 | /* Overflow soon to find bugs easier: */ |
70ebe4a4 | 506 | hsr->sequence_nr = USHRT_MAX - 1024; |
f421436a | 507 | |
70ebe4a4 AB |
508 | init_timer(&hsr->announce_timer); |
509 | hsr->announce_timer.function = hsr_announce; | |
510 | hsr->announce_timer.data = (unsigned long) hsr; | |
f421436a | 511 | |
abff7162 AB |
512 | init_timer(&hsr->prune_timer); |
513 | hsr->prune_timer.function = hsr_prune_nodes; | |
514 | hsr->prune_timer.data = (unsigned long) hsr; | |
515 | ||
70ebe4a4 AB |
516 | ether_addr_copy(hsr->sup_multicast_addr, def_multicast_addr); |
517 | hsr->sup_multicast_addr[ETH_ALEN - 1] = multicast_spec; | |
f421436a AB |
518 | |
519 | /* FIXME: should I modify the value of these? | |
520 | * | |
521 | * - hsr_dev->flags - i.e. | |
522 | * IFF_MASTER/SLAVE? | |
523 | * - hsr_dev->priv_flags - i.e. | |
524 | * IFF_EBRIDGE? | |
525 | * IFF_TX_SKB_SHARING? | |
526 | * IFF_HSR_MASTER/SLAVE? | |
527 | */ | |
528 | ||
f421436a AB |
529 | /* Make sure the 1st call to netif_carrier_on() gets through */ |
530 | netif_carrier_off(hsr_dev); | |
531 | ||
f421436a AB |
532 | res = register_netdevice(hsr_dev); |
533 | if (res) | |
51f3c605 AB |
534 | return res; |
535 | ||
536 | res = hsr_add_slave(hsr, slave[0], 0); | |
537 | if (res) | |
538 | return res; | |
539 | res = hsr_add_slave(hsr, slave[1], 1); | |
540 | if (res) { | |
541 | hsr_del_slave(hsr, 0); | |
542 | return res; | |
543 | } | |
f421436a | 544 | |
abff7162 AB |
545 | hsr->prune_timer.expires = jiffies + msecs_to_jiffies(PRUNE_PERIOD); |
546 | add_timer(&hsr->prune_timer); | |
547 | ||
70ebe4a4 | 548 | register_hsr_master(hsr); |
f421436a AB |
549 | |
550 | return 0; | |
f421436a | 551 | } |