1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * drivers/net/bond/bond_netlink.c - Netlink interface for bonding
4  * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
5  * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
6  */
7 
8 #include <linux/module.h>
9 #include <linux/errno.h>
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/if_link.h>
13 #include <linux/if_ether.h>
14 #include <net/netlink.h>
15 #include <net/rtnetlink.h>
16 #include <net/bonding.h>
17 
18 static size_t bond_get_slave_size(const struct net_device *bond_dev,
19 				  const struct net_device *slave_dev)
20 {
21 	return nla_total_size(sizeof(u8)) +	/* IFLA_BOND_SLAVE_STATE */
22 		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_SLAVE_MII_STATUS */
23 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_SLAVE_LINK_FAILURE_COUNT */
24 		nla_total_size(MAX_ADDR_LEN) +	/* IFLA_BOND_SLAVE_PERM_HWADDR */
25 		nla_total_size(sizeof(u16)) +	/* IFLA_BOND_SLAVE_QUEUE_ID */
26 		nla_total_size(sizeof(u16)) +	/* IFLA_BOND_SLAVE_AD_AGGREGATOR_ID */
27 		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE */
28 		nla_total_size(sizeof(u16)) +	/* IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE */
29 		0;
30 }
31 
32 static int bond_fill_slave_info(struct sk_buff *skb,
33 				const struct net_device *bond_dev,
34 				const struct net_device *slave_dev)
35 {
36 	struct slave *slave = bond_slave_get_rtnl(slave_dev);
37 
38 	if (nla_put_u8(skb, IFLA_BOND_SLAVE_STATE, bond_slave_state(slave)))
39 		goto nla_put_failure;
40 
41 	if (nla_put_u8(skb, IFLA_BOND_SLAVE_MII_STATUS, slave->link))
42 		goto nla_put_failure;
43 
44 	if (nla_put_u32(skb, IFLA_BOND_SLAVE_LINK_FAILURE_COUNT,
45 			slave->link_failure_count))
46 		goto nla_put_failure;
47 
48 	if (nla_put(skb, IFLA_BOND_SLAVE_PERM_HWADDR,
49 		    slave_dev->addr_len, slave->perm_hwaddr))
50 		goto nla_put_failure;
51 
52 	if (nla_put_u16(skb, IFLA_BOND_SLAVE_QUEUE_ID, slave->queue_id))
53 		goto nla_put_failure;
54 
55 	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
56 		const struct aggregator *agg;
57 		const struct port *ad_port;
58 
59 		ad_port = &SLAVE_AD_INFO(slave)->port;
60 		agg = SLAVE_AD_INFO(slave)->port.aggregator;
61 		if (agg) {
62 			if (nla_put_u16(skb, IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
63 					agg->aggregator_identifier))
64 				goto nla_put_failure;
65 			if (nla_put_u8(skb,
66 				       IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
67 				       ad_port->actor_oper_port_state))
68 				goto nla_put_failure;
69 			if (nla_put_u16(skb,
70 					IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
71 					ad_port->partner_oper.port_state))
72 				goto nla_put_failure;
73 		}
74 	}
75 
76 	return 0;
77 
78 nla_put_failure:
79 	return -EMSGSIZE;
80 }
81 
82 static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
83 	[IFLA_BOND_MODE]		= { .type = NLA_U8 },
84 	[IFLA_BOND_ACTIVE_SLAVE]	= { .type = NLA_U32 },
85 	[IFLA_BOND_MIIMON]		= { .type = NLA_U32 },
86 	[IFLA_BOND_UPDELAY]		= { .type = NLA_U32 },
87 	[IFLA_BOND_DOWNDELAY]		= { .type = NLA_U32 },
88 	[IFLA_BOND_USE_CARRIER]		= { .type = NLA_U8 },
89 	[IFLA_BOND_ARP_INTERVAL]	= { .type = NLA_U32 },
90 	[IFLA_BOND_ARP_IP_TARGET]	= { .type = NLA_NESTED },
91 	[IFLA_BOND_ARP_VALIDATE]	= { .type = NLA_U32 },
92 	[IFLA_BOND_ARP_ALL_TARGETS]	= { .type = NLA_U32 },
93 	[IFLA_BOND_PRIMARY]		= { .type = NLA_U32 },
94 	[IFLA_BOND_PRIMARY_RESELECT]	= { .type = NLA_U8 },
95 	[IFLA_BOND_FAIL_OVER_MAC]	= { .type = NLA_U8 },
96 	[IFLA_BOND_XMIT_HASH_POLICY]	= { .type = NLA_U8 },
97 	[IFLA_BOND_RESEND_IGMP]		= { .type = NLA_U32 },
98 	[IFLA_BOND_NUM_PEER_NOTIF]	= { .type = NLA_U8 },
99 	[IFLA_BOND_ALL_SLAVES_ACTIVE]	= { .type = NLA_U8 },
100 	[IFLA_BOND_MIN_LINKS]		= { .type = NLA_U32 },
101 	[IFLA_BOND_LP_INTERVAL]		= { .type = NLA_U32 },
102 	[IFLA_BOND_PACKETS_PER_SLAVE]	= { .type = NLA_U32 },
103 	[IFLA_BOND_AD_LACP_RATE]	= { .type = NLA_U8 },
104 	[IFLA_BOND_AD_SELECT]		= { .type = NLA_U8 },
105 	[IFLA_BOND_AD_INFO]		= { .type = NLA_NESTED },
106 	[IFLA_BOND_AD_ACTOR_SYS_PRIO]	= { .type = NLA_U16 },
107 	[IFLA_BOND_AD_USER_PORT_KEY]	= { .type = NLA_U16 },
108 	[IFLA_BOND_AD_ACTOR_SYSTEM]	= { .type = NLA_BINARY,
109 					    .len  = ETH_ALEN },
110 	[IFLA_BOND_TLB_DYNAMIC_LB]	= { .type = NLA_U8 },
111 	[IFLA_BOND_PEER_NOTIF_DELAY]    = { .type = NLA_U32 },
112 };
113 
114 static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = {
115 	[IFLA_BOND_SLAVE_QUEUE_ID]	= { .type = NLA_U16 },
116 };
117 
118 static int bond_validate(struct nlattr *tb[], struct nlattr *data[],
119 			 struct netlink_ext_ack *extack)
120 {
121 	if (tb[IFLA_ADDRESS]) {
122 		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
123 			return -EINVAL;
124 		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
125 			return -EADDRNOTAVAIL;
126 	}
127 	return 0;
128 }
129 
130 static int bond_slave_changelink(struct net_device *bond_dev,
131 				 struct net_device *slave_dev,
132 				 struct nlattr *tb[], struct nlattr *data[],
133 				 struct netlink_ext_ack *extack)
134 {
135 	struct bonding *bond = netdev_priv(bond_dev);
136 	struct bond_opt_value newval;
137 	int err;
138 
139 	if (!data)
140 		return 0;
141 
142 	if (data[IFLA_BOND_SLAVE_QUEUE_ID]) {
143 		u16 queue_id = nla_get_u16(data[IFLA_BOND_SLAVE_QUEUE_ID]);
144 		char queue_id_str[IFNAMSIZ + 7];
145 
146 		/* queue_id option setting expects slave_name:queue_id */
147 		snprintf(queue_id_str, sizeof(queue_id_str), "%s:%u\n",
148 			 slave_dev->name, queue_id);
149 		bond_opt_initstr(&newval, queue_id_str);
150 		err = __bond_opt_set(bond, BOND_OPT_QUEUE_ID, &newval);
151 		if (err)
152 			return err;
153 	}
154 
155 	return 0;
156 }
157 
158 static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[],
159 			   struct nlattr *data[],
160 			   struct netlink_ext_ack *extack)
161 {
162 	struct bonding *bond = netdev_priv(bond_dev);
163 	struct bond_opt_value newval;
164 	int miimon = 0;
165 	int err;
166 
167 	if (!data)
168 		return 0;
169 
170 	if (data[IFLA_BOND_MODE]) {
171 		int mode = nla_get_u8(data[IFLA_BOND_MODE]);
172 
173 		bond_opt_initval(&newval, mode);
174 		err = __bond_opt_set(bond, BOND_OPT_MODE, &newval);
175 		if (err)
176 			return err;
177 	}
178 	if (data[IFLA_BOND_ACTIVE_SLAVE]) {
179 		int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
180 		struct net_device *slave_dev;
181 		char *active_slave = "";
182 
183 		if (ifindex != 0) {
184 			slave_dev = __dev_get_by_index(dev_net(bond_dev),
185 						       ifindex);
186 			if (!slave_dev)
187 				return -ENODEV;
188 			active_slave = slave_dev->name;
189 		}
190 		bond_opt_initstr(&newval, active_slave);
191 		err = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval);
192 		if (err)
193 			return err;
194 	}
195 	if (data[IFLA_BOND_MIIMON]) {
196 		miimon = nla_get_u32(data[IFLA_BOND_MIIMON]);
197 
198 		bond_opt_initval(&newval, miimon);
199 		err = __bond_opt_set(bond, BOND_OPT_MIIMON, &newval);
200 		if (err)
201 			return err;
202 	}
203 	if (data[IFLA_BOND_UPDELAY]) {
204 		int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]);
205 
206 		bond_opt_initval(&newval, updelay);
207 		err = __bond_opt_set(bond, BOND_OPT_UPDELAY, &newval);
208 		if (err)
209 			return err;
210 	}
211 	if (data[IFLA_BOND_DOWNDELAY]) {
212 		int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]);
213 
214 		bond_opt_initval(&newval, downdelay);
215 		err = __bond_opt_set(bond, BOND_OPT_DOWNDELAY, &newval);
216 		if (err)
217 			return err;
218 	}
219 	if (data[IFLA_BOND_PEER_NOTIF_DELAY]) {
220 		int delay = nla_get_u32(data[IFLA_BOND_PEER_NOTIF_DELAY]);
221 
222 		bond_opt_initval(&newval, delay);
223 		err = __bond_opt_set(bond, BOND_OPT_PEER_NOTIF_DELAY, &newval);
224 		if (err)
225 			return err;
226 	}
227 	if (data[IFLA_BOND_USE_CARRIER]) {
228 		int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]);
229 
230 		bond_opt_initval(&newval, use_carrier);
231 		err = __bond_opt_set(bond, BOND_OPT_USE_CARRIER, &newval);
232 		if (err)
233 			return err;
234 	}
235 	if (data[IFLA_BOND_ARP_INTERVAL]) {
236 		int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]);
237 
238 		if (arp_interval && miimon) {
239 			netdev_err(bond->dev, "ARP monitoring cannot be used with MII monitoring\n");
240 			return -EINVAL;
241 		}
242 
243 		bond_opt_initval(&newval, arp_interval);
244 		err = __bond_opt_set(bond, BOND_OPT_ARP_INTERVAL, &newval);
245 		if (err)
246 			return err;
247 	}
248 	if (data[IFLA_BOND_ARP_IP_TARGET]) {
249 		struct nlattr *attr;
250 		int i = 0, rem;
251 
252 		bond_option_arp_ip_targets_clear(bond);
253 		nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
254 			__be32 target;
255 
256 			if (nla_len(attr) < sizeof(target))
257 				return -EINVAL;
258 
259 			target = nla_get_be32(attr);
260 
261 			bond_opt_initval(&newval, (__force u64)target);
262 			err = __bond_opt_set(bond, BOND_OPT_ARP_TARGETS,
263 					     &newval);
264 			if (err)
265 				break;
266 			i++;
267 		}
268 		if (i == 0 && bond->params.arp_interval)
269 			netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
270 		if (err)
271 			return err;
272 	}
273 	if (data[IFLA_BOND_ARP_VALIDATE]) {
274 		int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]);
275 
276 		if (arp_validate && miimon) {
277 			netdev_err(bond->dev, "ARP validating cannot be used with MII monitoring\n");
278 			return -EINVAL;
279 		}
280 
281 		bond_opt_initval(&newval, arp_validate);
282 		err = __bond_opt_set(bond, BOND_OPT_ARP_VALIDATE, &newval);
283 		if (err)
284 			return err;
285 	}
286 	if (data[IFLA_BOND_ARP_ALL_TARGETS]) {
287 		int arp_all_targets =
288 			nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]);
289 
290 		bond_opt_initval(&newval, arp_all_targets);
291 		err = __bond_opt_set(bond, BOND_OPT_ARP_ALL_TARGETS, &newval);
292 		if (err)
293 			return err;
294 	}
295 	if (data[IFLA_BOND_PRIMARY]) {
296 		int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
297 		struct net_device *dev;
298 		char *primary = "";
299 
300 		dev = __dev_get_by_index(dev_net(bond_dev), ifindex);
301 		if (dev)
302 			primary = dev->name;
303 
304 		bond_opt_initstr(&newval, primary);
305 		err = __bond_opt_set(bond, BOND_OPT_PRIMARY, &newval);
306 		if (err)
307 			return err;
308 	}
309 	if (data[IFLA_BOND_PRIMARY_RESELECT]) {
310 		int primary_reselect =
311 			nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]);
312 
313 		bond_opt_initval(&newval, primary_reselect);
314 		err = __bond_opt_set(bond, BOND_OPT_PRIMARY_RESELECT, &newval);
315 		if (err)
316 			return err;
317 	}
318 	if (data[IFLA_BOND_FAIL_OVER_MAC]) {
319 		int fail_over_mac =
320 			nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]);
321 
322 		bond_opt_initval(&newval, fail_over_mac);
323 		err = __bond_opt_set(bond, BOND_OPT_FAIL_OVER_MAC, &newval);
324 		if (err)
325 			return err;
326 	}
327 	if (data[IFLA_BOND_XMIT_HASH_POLICY]) {
328 		int xmit_hash_policy =
329 			nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]);
330 
331 		bond_opt_initval(&newval, xmit_hash_policy);
332 		err = __bond_opt_set(bond, BOND_OPT_XMIT_HASH, &newval);
333 		if (err)
334 			return err;
335 	}
336 	if (data[IFLA_BOND_RESEND_IGMP]) {
337 		int resend_igmp =
338 			nla_get_u32(data[IFLA_BOND_RESEND_IGMP]);
339 
340 		bond_opt_initval(&newval, resend_igmp);
341 		err = __bond_opt_set(bond, BOND_OPT_RESEND_IGMP, &newval);
342 		if (err)
343 			return err;
344 	}
345 	if (data[IFLA_BOND_NUM_PEER_NOTIF]) {
346 		int num_peer_notif =
347 			nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]);
348 
349 		bond_opt_initval(&newval, num_peer_notif);
350 		err = __bond_opt_set(bond, BOND_OPT_NUM_PEER_NOTIF, &newval);
351 		if (err)
352 			return err;
353 	}
354 	if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) {
355 		int all_slaves_active =
356 			nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]);
357 
358 		bond_opt_initval(&newval, all_slaves_active);
359 		err = __bond_opt_set(bond, BOND_OPT_ALL_SLAVES_ACTIVE, &newval);
360 		if (err)
361 			return err;
362 	}
363 	if (data[IFLA_BOND_MIN_LINKS]) {
364 		int min_links =
365 			nla_get_u32(data[IFLA_BOND_MIN_LINKS]);
366 
367 		bond_opt_initval(&newval, min_links);
368 		err = __bond_opt_set(bond, BOND_OPT_MINLINKS, &newval);
369 		if (err)
370 			return err;
371 	}
372 	if (data[IFLA_BOND_LP_INTERVAL]) {
373 		int lp_interval =
374 			nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);
375 
376 		bond_opt_initval(&newval, lp_interval);
377 		err = __bond_opt_set(bond, BOND_OPT_LP_INTERVAL, &newval);
378 		if (err)
379 			return err;
380 	}
381 	if (data[IFLA_BOND_PACKETS_PER_SLAVE]) {
382 		int packets_per_slave =
383 			nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]);
384 
385 		bond_opt_initval(&newval, packets_per_slave);
386 		err = __bond_opt_set(bond, BOND_OPT_PACKETS_PER_SLAVE, &newval);
387 		if (err)
388 			return err;
389 	}
390 	if (data[IFLA_BOND_AD_LACP_RATE]) {
391 		int lacp_rate =
392 			nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]);
393 
394 		bond_opt_initval(&newval, lacp_rate);
395 		err = __bond_opt_set(bond, BOND_OPT_LACP_RATE, &newval);
396 		if (err)
397 			return err;
398 	}
399 	if (data[IFLA_BOND_AD_SELECT]) {
400 		int ad_select =
401 			nla_get_u8(data[IFLA_BOND_AD_SELECT]);
402 
403 		bond_opt_initval(&newval, ad_select);
404 		err = __bond_opt_set(bond, BOND_OPT_AD_SELECT, &newval);
405 		if (err)
406 			return err;
407 	}
408 	if (data[IFLA_BOND_AD_ACTOR_SYS_PRIO]) {
409 		int actor_sys_prio =
410 			nla_get_u16(data[IFLA_BOND_AD_ACTOR_SYS_PRIO]);
411 
412 		bond_opt_initval(&newval, actor_sys_prio);
413 		err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYS_PRIO, &newval);
414 		if (err)
415 			return err;
416 	}
417 	if (data[IFLA_BOND_AD_USER_PORT_KEY]) {
418 		int port_key =
419 			nla_get_u16(data[IFLA_BOND_AD_USER_PORT_KEY]);
420 
421 		bond_opt_initval(&newval, port_key);
422 		err = __bond_opt_set(bond, BOND_OPT_AD_USER_PORT_KEY, &newval);
423 		if (err)
424 			return err;
425 	}
426 	if (data[IFLA_BOND_AD_ACTOR_SYSTEM]) {
427 		if (nla_len(data[IFLA_BOND_AD_ACTOR_SYSTEM]) != ETH_ALEN)
428 			return -EINVAL;
429 
430 		bond_opt_initval(&newval,
431 				 nla_get_u64(data[IFLA_BOND_AD_ACTOR_SYSTEM]));
432 		err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYSTEM, &newval);
433 		if (err)
434 			return err;
435 	}
436 	if (data[IFLA_BOND_TLB_DYNAMIC_LB]) {
437 		int dynamic_lb = nla_get_u8(data[IFLA_BOND_TLB_DYNAMIC_LB]);
438 
439 		bond_opt_initval(&newval, dynamic_lb);
440 		err = __bond_opt_set(bond, BOND_OPT_TLB_DYNAMIC_LB, &newval);
441 		if (err)
442 			return err;
443 	}
444 
445 	return 0;
446 }
447 
448 static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
449 			struct nlattr *tb[], struct nlattr *data[],
450 			struct netlink_ext_ack *extack)
451 {
452 	int err;
453 
454 	err = bond_changelink(bond_dev, tb, data, extack);
455 	if (err < 0)
456 		return err;
457 
458 	err = register_netdevice(bond_dev);
459 
460 	netif_carrier_off(bond_dev);
461 	if (!err) {
462 		struct bonding *bond = netdev_priv(bond_dev);
463 
464 		bond_work_init_all(bond);
465 	}
466 
467 	return err;
468 }
469 
470 static size_t bond_get_size(const struct net_device *bond_dev)
471 {
472 	return nla_total_size(sizeof(u8)) +	/* IFLA_BOND_MODE */
473 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ACTIVE_SLAVE */
474 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_MIIMON */
475 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_UPDELAY */
476 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_DOWNDELAY */
477 		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_USE_CARRIER */
478 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ARP_INTERVAL */
479 						/* IFLA_BOND_ARP_IP_TARGET */
480 		nla_total_size(sizeof(struct nlattr)) +
481 		nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
482 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ARP_VALIDATE */
483 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ARP_ALL_TARGETS */
484 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_PRIMARY */
485 		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_PRIMARY_RESELECT */
486 		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_FAIL_OVER_MAC */
487 		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_XMIT_HASH_POLICY */
488 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_RESEND_IGMP */
489 		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_NUM_PEER_NOTIF */
490 		nla_total_size(sizeof(u8)) +   /* IFLA_BOND_ALL_SLAVES_ACTIVE */
491 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_MIN_LINKS */
492 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_LP_INTERVAL */
493 		nla_total_size(sizeof(u32)) +  /* IFLA_BOND_PACKETS_PER_SLAVE */
494 		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_AD_LACP_RATE */
495 		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_AD_SELECT */
496 		nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */
497 		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */
498 		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */
499 		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */
500 		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/
501 		nla_total_size(ETH_ALEN) +    /* IFLA_BOND_AD_INFO_PARTNER_MAC*/
502 		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_ACTOR_SYS_PRIO */
503 		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_USER_PORT_KEY */
504 		nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_ACTOR_SYSTEM */
505 		nla_total_size(sizeof(u8)) + /* IFLA_BOND_TLB_DYNAMIC_LB */
506 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_PEER_NOTIF_DELAY */
507 		0;
508 }
509 
510 static int bond_option_active_slave_get_ifindex(struct bonding *bond)
511 {
512 	const struct net_device *slave;
513 	int ifindex;
514 
515 	rcu_read_lock();
516 	slave = bond_option_active_slave_get_rcu(bond);
517 	ifindex = slave ? slave->ifindex : 0;
518 	rcu_read_unlock();
519 	return ifindex;
520 }
521 
522 static int bond_fill_info(struct sk_buff *skb,
523 			  const struct net_device *bond_dev)
524 {
525 	struct bonding *bond = netdev_priv(bond_dev);
526 	unsigned int packets_per_slave;
527 	int ifindex, i, targets_added;
528 	struct nlattr *targets;
529 	struct slave *primary;
530 
531 	if (nla_put_u8(skb, IFLA_BOND_MODE, BOND_MODE(bond)))
532 		goto nla_put_failure;
533 
534 	ifindex = bond_option_active_slave_get_ifindex(bond);
535 	if (ifindex && nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, ifindex))
536 		goto nla_put_failure;
537 
538 	if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon))
539 		goto nla_put_failure;
540 
541 	if (nla_put_u32(skb, IFLA_BOND_UPDELAY,
542 			bond->params.updelay * bond->params.miimon))
543 		goto nla_put_failure;
544 
545 	if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY,
546 			bond->params.downdelay * bond->params.miimon))
547 		goto nla_put_failure;
548 
549 	if (nla_put_u32(skb, IFLA_BOND_PEER_NOTIF_DELAY,
550 			bond->params.peer_notif_delay * bond->params.miimon))
551 		goto nla_put_failure;
552 
553 	if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier))
554 		goto nla_put_failure;
555 
556 	if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
557 		goto nla_put_failure;
558 
559 	targets = nla_nest_start_noflag(skb, IFLA_BOND_ARP_IP_TARGET);
560 	if (!targets)
561 		goto nla_put_failure;
562 
563 	targets_added = 0;
564 	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
565 		if (bond->params.arp_targets[i]) {
566 			if (nla_put_be32(skb, i, bond->params.arp_targets[i]))
567 				goto nla_put_failure;
568 			targets_added = 1;
569 		}
570 	}
571 
572 	if (targets_added)
573 		nla_nest_end(skb, targets);
574 	else
575 		nla_nest_cancel(skb, targets);
576 
577 	if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate))
578 		goto nla_put_failure;
579 
580 	if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS,
581 			bond->params.arp_all_targets))
582 		goto nla_put_failure;
583 
584 	primary = rtnl_dereference(bond->primary_slave);
585 	if (primary &&
586 	    nla_put_u32(skb, IFLA_BOND_PRIMARY, primary->dev->ifindex))
587 		goto nla_put_failure;
588 
589 	if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT,
590 		       bond->params.primary_reselect))
591 		goto nla_put_failure;
592 
593 	if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC,
594 		       bond->params.fail_over_mac))
595 		goto nla_put_failure;
596 
597 	if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY,
598 		       bond->params.xmit_policy))
599 		goto nla_put_failure;
600 
601 	if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP,
602 		        bond->params.resend_igmp))
603 		goto nla_put_failure;
604 
605 	if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF,
606 		       bond->params.num_peer_notif))
607 		goto nla_put_failure;
608 
609 	if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE,
610 		       bond->params.all_slaves_active))
611 		goto nla_put_failure;
612 
613 	if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS,
614 			bond->params.min_links))
615 		goto nla_put_failure;
616 
617 	if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
618 			bond->params.lp_interval))
619 		goto nla_put_failure;
620 
621 	packets_per_slave = bond->params.packets_per_slave;
622 	if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE,
623 			packets_per_slave))
624 		goto nla_put_failure;
625 
626 	if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE,
627 		       bond->params.lacp_fast))
628 		goto nla_put_failure;
629 
630 	if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
631 		       bond->params.ad_select))
632 		goto nla_put_failure;
633 
634 	if (nla_put_u8(skb, IFLA_BOND_TLB_DYNAMIC_LB,
635 		       bond->params.tlb_dynamic_lb))
636 		goto nla_put_failure;
637 
638 	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
639 		struct ad_info info;
640 
641 		if (capable(CAP_NET_ADMIN)) {
642 			if (nla_put_u16(skb, IFLA_BOND_AD_ACTOR_SYS_PRIO,
643 					bond->params.ad_actor_sys_prio))
644 				goto nla_put_failure;
645 
646 			if (nla_put_u16(skb, IFLA_BOND_AD_USER_PORT_KEY,
647 					bond->params.ad_user_port_key))
648 				goto nla_put_failure;
649 
650 			if (nla_put(skb, IFLA_BOND_AD_ACTOR_SYSTEM,
651 				    ETH_ALEN, &bond->params.ad_actor_system))
652 				goto nla_put_failure;
653 		}
654 		if (!bond_3ad_get_active_agg_info(bond, &info)) {
655 			struct nlattr *nest;
656 
657 			nest = nla_nest_start_noflag(skb, IFLA_BOND_AD_INFO);
658 			if (!nest)
659 				goto nla_put_failure;
660 
661 			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR,
662 					info.aggregator_id))
663 				goto nla_put_failure;
664 			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS,
665 					info.ports))
666 				goto nla_put_failure;
667 			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY,
668 					info.actor_key))
669 				goto nla_put_failure;
670 			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY,
671 					info.partner_key))
672 				goto nla_put_failure;
673 			if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC,
674 				    sizeof(info.partner_system),
675 				    &info.partner_system))
676 				goto nla_put_failure;
677 
678 			nla_nest_end(skb, nest);
679 		}
680 	}
681 
682 	return 0;
683 
684 nla_put_failure:
685 	return -EMSGSIZE;
686 }
687 
688 static size_t bond_get_linkxstats_size(const struct net_device *dev, int attr)
689 {
690 	switch (attr) {
691 	case IFLA_STATS_LINK_XSTATS:
692 	case IFLA_STATS_LINK_XSTATS_SLAVE:
693 		break;
694 	default:
695 		return 0;
696 	}
697 
698 	return bond_3ad_stats_size() + nla_total_size(0);
699 }
700 
701 static int bond_fill_linkxstats(struct sk_buff *skb,
702 				const struct net_device *dev,
703 				int *prividx, int attr)
704 {
705 	struct nlattr *nla __maybe_unused;
706 	struct slave *slave = NULL;
707 	struct nlattr *nest, *nest2;
708 	struct bonding *bond;
709 
710 	switch (attr) {
711 	case IFLA_STATS_LINK_XSTATS:
712 		bond = netdev_priv(dev);
713 		break;
714 	case IFLA_STATS_LINK_XSTATS_SLAVE:
715 		slave = bond_slave_get_rtnl(dev);
716 		if (!slave)
717 			return 0;
718 		bond = slave->bond;
719 		break;
720 	default:
721 		return -EINVAL;
722 	}
723 
724 	nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BOND);
725 	if (!nest)
726 		return -EMSGSIZE;
727 	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
728 		struct bond_3ad_stats *stats;
729 
730 		if (slave)
731 			stats = &SLAVE_AD_INFO(slave)->stats;
732 		else
733 			stats = &BOND_AD_INFO(bond).stats;
734 
735 		nest2 = nla_nest_start_noflag(skb, BOND_XSTATS_3AD);
736 		if (!nest2) {
737 			nla_nest_end(skb, nest);
738 			return -EMSGSIZE;
739 		}
740 
741 		if (bond_3ad_stats_fill(skb, stats)) {
742 			nla_nest_cancel(skb, nest2);
743 			nla_nest_end(skb, nest);
744 			return -EMSGSIZE;
745 		}
746 		nla_nest_end(skb, nest2);
747 	}
748 	nla_nest_end(skb, nest);
749 
750 	return 0;
751 }
752 
753 struct rtnl_link_ops bond_link_ops __read_mostly = {
754 	.kind			= "bond",
755 	.priv_size		= sizeof(struct bonding),
756 	.setup			= bond_setup,
757 	.maxtype		= IFLA_BOND_MAX,
758 	.policy			= bond_policy,
759 	.validate		= bond_validate,
760 	.newlink		= bond_newlink,
761 	.changelink		= bond_changelink,
762 	.get_size		= bond_get_size,
763 	.fill_info		= bond_fill_info,
764 	.get_num_tx_queues	= bond_get_num_tx_queues,
765 	.get_num_rx_queues	= bond_get_num_tx_queues, /* Use the same number
766 							     as for TX queues */
767 	.fill_linkxstats        = bond_fill_linkxstats,
768 	.get_linkxstats_size    = bond_get_linkxstats_size,
769 	.slave_maxtype		= IFLA_BOND_SLAVE_MAX,
770 	.slave_policy		= bond_slave_policy,
771 	.slave_changelink	= bond_slave_changelink,
772 	.get_slave_size		= bond_get_slave_size,
773 	.fill_slave_info	= bond_fill_slave_info,
774 };
775 
776 int __init bond_netlink_init(void)
777 {
778 	return rtnl_link_register(&bond_link_ops);
779 }
780 
781 void bond_netlink_fini(void)
782 {
783 	rtnl_link_unregister(&bond_link_ops);
784 }
785 
786 MODULE_ALIAS_RTNL_LINK("bond");
787