bond_netlink.c

  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#include <net/ipv6.h>
 18
 19static size_t bond_get_slave_size(const struct net_device *bond_dev,
 20				  const struct net_device *slave_dev)
 21{
 22	return nla_total_size(sizeof(u8)) +	/* IFLA_BOND_SLAVE_STATE */
 23		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_SLAVE_MII_STATUS */
 24		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_SLAVE_LINK_FAILURE_COUNT */
 25		nla_total_size(MAX_ADDR_LEN) +	/* IFLA_BOND_SLAVE_PERM_HWADDR */
 26		nla_total_size(sizeof(u16)) +	/* IFLA_BOND_SLAVE_QUEUE_ID */
 27		nla_total_size(sizeof(u16)) +	/* IFLA_BOND_SLAVE_AD_AGGREGATOR_ID */
 28		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE */
 29		nla_total_size(sizeof(u16)) +	/* IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE */
 30		nla_total_size(sizeof(s32)) +	/* IFLA_BOND_SLAVE_PRIO */
 31		nla_total_size(sizeof(u16)) +	/* IFLA_BOND_SLAVE_ACTOR_PORT_PRIO */
 32		0;
 33}
 34
 35static int bond_fill_slave_info(struct sk_buff *skb,
 36				const struct net_device *bond_dev,
 37				const struct net_device *slave_dev)
 38{
 39	struct slave *slave = bond_slave_get_rtnl(slave_dev);
 40
 41	if (nla_put_u8(skb, IFLA_BOND_SLAVE_STATE, bond_slave_state(slave)))
 42		goto nla_put_failure;
 43
 44	if (nla_put_u8(skb, IFLA_BOND_SLAVE_MII_STATUS, slave->link))
 45		goto nla_put_failure;
 46
 47	if (nla_put_u32(skb, IFLA_BOND_SLAVE_LINK_FAILURE_COUNT,
 48			slave->link_failure_count))
 49		goto nla_put_failure;
 50
 51	if (nla_put(skb, IFLA_BOND_SLAVE_PERM_HWADDR,
 52		    slave_dev->addr_len, slave->perm_hwaddr))
 53		goto nla_put_failure;
 54
 55	if (nla_put_u16(skb, IFLA_BOND_SLAVE_QUEUE_ID,
 56			READ_ONCE(slave->queue_id)))
 57		goto nla_put_failure;
 58
 59	if (nla_put_s32(skb, IFLA_BOND_SLAVE_PRIO, slave->prio))
 60		goto nla_put_failure;
 61
 62	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
 63		const struct aggregator *agg;
 64		const struct port *ad_port;
 65
 66		ad_port = &SLAVE_AD_INFO(slave)->port;
 67		agg = SLAVE_AD_INFO(slave)->port.aggregator;
 68		if (agg) {
 69			if (nla_put_u16(skb, IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
 70					agg->aggregator_identifier))
 71				goto nla_put_failure;
 72			if (nla_put_u8(skb,
 73				       IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
 74				       ad_port->actor_oper_port_state))
 75				goto nla_put_failure;
 76			if (nla_put_u16(skb,
 77					IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
 78					ad_port->partner_oper.port_state))
 79				goto nla_put_failure;
 80		}
 81
 82		if (nla_put_u16(skb, IFLA_BOND_SLAVE_ACTOR_PORT_PRIO,
 83				SLAVE_AD_INFO(slave)->port_priority))
 84			goto nla_put_failure;
 85	}
 86
 87	return 0;
 88
 89nla_put_failure:
 90	return -EMSGSIZE;
 91}
 92
 93/* Limit the max delay range to 300s */
 94static const struct netlink_range_validation delay_range = {
 95	.max = 300000,
 96};
 97
 98static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
 99	[IFLA_BOND_MODE]		= { .type = NLA_U8 },
100	[IFLA_BOND_ACTIVE_SLAVE]	= { .type = NLA_U32 },
101	[IFLA_BOND_MIIMON]		= { .type = NLA_U32 },
102	[IFLA_BOND_UPDELAY]		= { .type = NLA_U32 },
103	[IFLA_BOND_DOWNDELAY]		= { .type = NLA_U32 },
104	[IFLA_BOND_USE_CARRIER]		= { .type = NLA_U8 },
105	[IFLA_BOND_ARP_INTERVAL]	= { .type = NLA_U32 },
106	[IFLA_BOND_ARP_IP_TARGET]	= { .type = NLA_NESTED },
107	[IFLA_BOND_ARP_VALIDATE]	= { .type = NLA_U32 },
108	[IFLA_BOND_ARP_ALL_TARGETS]	= { .type = NLA_U32 },
109	[IFLA_BOND_PRIMARY]		= { .type = NLA_U32 },
110	[IFLA_BOND_PRIMARY_RESELECT]	= { .type = NLA_U8 },
111	[IFLA_BOND_FAIL_OVER_MAC]	= { .type = NLA_U8 },
112	[IFLA_BOND_XMIT_HASH_POLICY]	= { .type = NLA_U8 },
113	[IFLA_BOND_RESEND_IGMP]		= { .type = NLA_U32 },
114	[IFLA_BOND_NUM_PEER_NOTIF]	= { .type = NLA_U8 },
115	[IFLA_BOND_ALL_SLAVES_ACTIVE]	= { .type = NLA_U8 },
116	[IFLA_BOND_MIN_LINKS]		= { .type = NLA_U32 },
117	[IFLA_BOND_LP_INTERVAL]		= { .type = NLA_U32 },
118	[IFLA_BOND_PACKETS_PER_SLAVE]	= { .type = NLA_U32 },
119	[IFLA_BOND_AD_LACP_ACTIVE]	= { .type = NLA_U8 },
120	[IFLA_BOND_AD_LACP_RATE]	= { .type = NLA_U8 },
121	[IFLA_BOND_AD_SELECT]		= { .type = NLA_U8 },
122	[IFLA_BOND_AD_INFO]		= { .type = NLA_NESTED },
123	[IFLA_BOND_AD_ACTOR_SYS_PRIO]	= { .type = NLA_U16 },
124	[IFLA_BOND_AD_USER_PORT_KEY]	= { .type = NLA_U16 },
125	[IFLA_BOND_AD_ACTOR_SYSTEM]	= { .type = NLA_BINARY,
126					    .len  = ETH_ALEN },
127	[IFLA_BOND_TLB_DYNAMIC_LB]	= { .type = NLA_U8 },
128	[IFLA_BOND_PEER_NOTIF_DELAY]    = NLA_POLICY_FULL_RANGE(NLA_U32, &delay_range),
129	[IFLA_BOND_MISSED_MAX]		= { .type = NLA_U8 },
130	[IFLA_BOND_NS_IP6_TARGET]	= { .type = NLA_NESTED },
131	[IFLA_BOND_COUPLED_CONTROL]	= { .type = NLA_U8 },
132	[IFLA_BOND_BROADCAST_NEIGH]	= { .type = NLA_U8 },
133};
134
135static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = {
136	[IFLA_BOND_SLAVE_QUEUE_ID]	= { .type = NLA_U16 },
137	[IFLA_BOND_SLAVE_PRIO]		= { .type = NLA_S32 },
138	[IFLA_BOND_SLAVE_ACTOR_PORT_PRIO]	= { .type = NLA_U16 },
139};
140
141static int bond_validate(struct nlattr *tb[], struct nlattr *data[],
142			 struct netlink_ext_ack *extack)
143{
144	if (tb[IFLA_ADDRESS]) {
145		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
146			return -EINVAL;
147		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
148			return -EADDRNOTAVAIL;
149	}
150	return 0;
151}
152
153static int bond_slave_changelink(struct net_device *bond_dev,
154				 struct net_device *slave_dev,
155				 struct nlattr *tb[], struct nlattr *data[],
156				 struct netlink_ext_ack *extack)
157{
158	struct bonding *bond = netdev_priv(bond_dev);
159	struct bond_opt_value newval;
160	int err;
161
162	if (!data)
163		return 0;
164
165	if (data[IFLA_BOND_SLAVE_QUEUE_ID]) {
166		u16 queue_id = nla_get_u16(data[IFLA_BOND_SLAVE_QUEUE_ID]);
167		char queue_id_str[IFNAMSIZ + 7];
168
169		/* queue_id option setting expects slave_name:queue_id */
170		snprintf(queue_id_str, sizeof(queue_id_str), "%s:%u\n",
171			 slave_dev->name, queue_id);
172		bond_opt_initstr(&newval, queue_id_str);
173		err = __bond_opt_set(bond, BOND_OPT_QUEUE_ID, &newval,
174				     data[IFLA_BOND_SLAVE_QUEUE_ID], extack);
175		if (err)
176			return err;
177	}
178
179	if (data[IFLA_BOND_SLAVE_PRIO]) {
180		int prio = nla_get_s32(data[IFLA_BOND_SLAVE_PRIO]);
181
182		bond_opt_slave_initval(&newval, &slave_dev, prio);
183		err = __bond_opt_set(bond, BOND_OPT_PRIO, &newval,
184				     data[IFLA_BOND_SLAVE_PRIO], extack);
185		if (err)
186			return err;
187	}
188
189	if (data[IFLA_BOND_SLAVE_ACTOR_PORT_PRIO]) {
190		u16 ad_prio = nla_get_u16(data[IFLA_BOND_SLAVE_ACTOR_PORT_PRIO]);
191
192		bond_opt_slave_initval(&newval, &slave_dev, ad_prio);
193		err = __bond_opt_set(bond, BOND_OPT_ACTOR_PORT_PRIO, &newval,
194				     data[IFLA_BOND_SLAVE_ACTOR_PORT_PRIO], extack);
195		if (err)
196			return err;
197	}
198
199	return 0;
200}
201
202static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[],
203			   struct nlattr *data[],
204			   struct netlink_ext_ack *extack)
205{
206	struct bonding *bond = netdev_priv(bond_dev);
207	struct bond_opt_value newval;
208	int miimon = 0;
209	int err;
210
211	if (!data)
212		return 0;
213
214	if (data[IFLA_BOND_MODE]) {
215		int mode = nla_get_u8(data[IFLA_BOND_MODE]);
216
217		bond_opt_initval(&newval, mode);
218		err = __bond_opt_set(bond, BOND_OPT_MODE, &newval,
219				     data[IFLA_BOND_MODE], extack);
220		if (err)
221			return err;
222	}
223	if (data[IFLA_BOND_ACTIVE_SLAVE]) {
224		int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
225		struct net_device *slave_dev;
226		char *active_slave = "";
227
228		if (ifindex != 0) {
229			slave_dev = __dev_get_by_index(dev_net(bond_dev),
230						       ifindex);
231			if (!slave_dev)
232				return -ENODEV;
233			active_slave = slave_dev->name;
234		}
235		bond_opt_initstr(&newval, active_slave);
236		err = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval,
237				     data[IFLA_BOND_ACTIVE_SLAVE], extack);
238		if (err)
239			return err;
240	}
241	if (data[IFLA_BOND_MIIMON]) {
242		miimon = nla_get_u32(data[IFLA_BOND_MIIMON]);
243
244		bond_opt_initval(&newval, miimon);
245		err = __bond_opt_set(bond, BOND_OPT_MIIMON, &newval,
246				     data[IFLA_BOND_MIIMON], extack);
247		if (err)
248			return err;
249	}
250	if (data[IFLA_BOND_UPDELAY]) {
251		int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]);
252
253		bond_opt_initval(&newval, updelay);
254		err = __bond_opt_set(bond, BOND_OPT_UPDELAY, &newval,
255				     data[IFLA_BOND_UPDELAY], extack);
256		if (err)
257			return err;
258	}
259	if (data[IFLA_BOND_DOWNDELAY]) {
260		int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]);
261
262		bond_opt_initval(&newval, downdelay);
263		err = __bond_opt_set(bond, BOND_OPT_DOWNDELAY, &newval,
264				     data[IFLA_BOND_DOWNDELAY], extack);
265		if (err)
266			return err;
267	}
268	if (data[IFLA_BOND_PEER_NOTIF_DELAY]) {
269		int delay = nla_get_u32(data[IFLA_BOND_PEER_NOTIF_DELAY]);
270
271		bond_opt_initval(&newval, delay);
272		err = __bond_opt_set(bond, BOND_OPT_PEER_NOTIF_DELAY, &newval,
273				     data[IFLA_BOND_PEER_NOTIF_DELAY], extack);
274		if (err)
275			return err;
276	}
277	if (data[IFLA_BOND_USE_CARRIER]) {
278		if (nla_get_u8(data[IFLA_BOND_USE_CARRIER]) != 1) {
279			NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_USE_CARRIER],
280					    "option obsolete, use_carrier cannot be disabled");
281			return -EINVAL;
282		}
283	}
284	if (data[IFLA_BOND_ARP_INTERVAL]) {
285		int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]);
286
287		if (arp_interval && miimon) {
288			NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_ARP_INTERVAL],
289					    "ARP monitoring cannot be used with MII monitoring");
290			return -EINVAL;
291		}
292
293		bond_opt_initval(&newval, arp_interval);
294		err = __bond_opt_set(bond, BOND_OPT_ARP_INTERVAL, &newval,
295				     data[IFLA_BOND_ARP_INTERVAL], extack);
296		if (err)
297			return err;
298	}
299	if (data[IFLA_BOND_ARP_IP_TARGET]) {
300		struct nlattr *attr;
301		int i = 0, rem;
302
303		bond_option_arp_ip_targets_clear(bond);
304		nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
305			__be32 target;
306
307			if (nla_len(attr) < sizeof(target))
308				return -EINVAL;
309
310			target = nla_get_be32(attr);
311
312			bond_opt_initval(&newval, (__force u64)target);
313			err = __bond_opt_set(bond, BOND_OPT_ARP_TARGETS,
314					     &newval,
315					     data[IFLA_BOND_ARP_IP_TARGET],
316					     extack);
317			if (err)
318				break;
319			i++;
320		}
321		if (i == 0 && bond->params.arp_interval)
322			netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
323		if (err)
324			return err;
325	}
326#if IS_ENABLED(CONFIG_IPV6)
327	if (data[IFLA_BOND_NS_IP6_TARGET]) {
328		struct nlattr *attr;
329		int i = 0, rem;
330
331		bond_option_ns_ip6_targets_clear(bond);
332		nla_for_each_nested(attr, data[IFLA_BOND_NS_IP6_TARGET], rem) {
333			struct in6_addr addr6;
334
335			if (nla_len(attr) < sizeof(addr6)) {
336				NL_SET_ERR_MSG(extack, "Invalid IPv6 address");
337				return -EINVAL;
338			}
339
340			addr6 = nla_get_in6_addr(attr);
341
342			bond_opt_initextra(&newval, &addr6, sizeof(addr6));
343			err = __bond_opt_set(bond, BOND_OPT_NS_TARGETS,
344					     &newval,
345					     data[IFLA_BOND_NS_IP6_TARGET],
346					     extack);
347			if (err)
348				break;
349			i++;
350		}
351		if (i == 0 && bond->params.arp_interval)
352			netdev_warn(bond->dev, "Removing last ns target with arp_interval on\n");
353		if (err)
354			return err;
355	}
356#endif
357	if (data[IFLA_BOND_ARP_VALIDATE]) {
358		int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]);
359
360		if (arp_validate && miimon) {
361			NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_ARP_INTERVAL],
362					    "ARP validating cannot be used with MII monitoring");
363			return -EINVAL;
364		}
365
366		bond_opt_initval(&newval, arp_validate);
367		err = __bond_opt_set(bond, BOND_OPT_ARP_VALIDATE, &newval,
368				     data[IFLA_BOND_ARP_VALIDATE], extack);
369		if (err)
370			return err;
371	}
372	if (data[IFLA_BOND_ARP_ALL_TARGETS]) {
373		int arp_all_targets =
374			nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]);
375
376		bond_opt_initval(&newval, arp_all_targets);
377		err = __bond_opt_set(bond, BOND_OPT_ARP_ALL_TARGETS, &newval,
378				     data[IFLA_BOND_ARP_ALL_TARGETS], extack);
379		if (err)
380			return err;
381	}
382	if (data[IFLA_BOND_PRIMARY]) {
383		int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
384		struct net_device *dev;
385		char *primary = "";
386
387		dev = __dev_get_by_index(dev_net(bond_dev), ifindex);
388		if (dev)
389			primary = dev->name;
390
391		bond_opt_initstr(&newval, primary);
392		err = __bond_opt_set(bond, BOND_OPT_PRIMARY, &newval,
393				     data[IFLA_BOND_PRIMARY], extack);
394		if (err)
395			return err;
396	}
397	if (data[IFLA_BOND_PRIMARY_RESELECT]) {
398		int primary_reselect =
399			nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]);
400
401		bond_opt_initval(&newval, primary_reselect);
402		err = __bond_opt_set(bond, BOND_OPT_PRIMARY_RESELECT, &newval,
403				     data[IFLA_BOND_PRIMARY_RESELECT], extack);
404		if (err)
405			return err;
406	}
407	if (data[IFLA_BOND_FAIL_OVER_MAC]) {
408		int fail_over_mac =
409			nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]);
410
411		bond_opt_initval(&newval, fail_over_mac);
412		err = __bond_opt_set(bond, BOND_OPT_FAIL_OVER_MAC, &newval,
413				     data[IFLA_BOND_FAIL_OVER_MAC], extack);
414		if (err)
415			return err;
416	}
417	if (data[IFLA_BOND_XMIT_HASH_POLICY]) {
418		int xmit_hash_policy =
419			nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]);
420
421		bond_opt_initval(&newval, xmit_hash_policy);
422		err = __bond_opt_set(bond, BOND_OPT_XMIT_HASH, &newval,
423				     data[IFLA_BOND_XMIT_HASH_POLICY], extack);
424		if (err)
425			return err;
426	}
427	if (data[IFLA_BOND_RESEND_IGMP]) {
428		int resend_igmp =
429			nla_get_u32(data[IFLA_BOND_RESEND_IGMP]);
430
431		bond_opt_initval(&newval, resend_igmp);
432		err = __bond_opt_set(bond, BOND_OPT_RESEND_IGMP, &newval,
433				     data[IFLA_BOND_RESEND_IGMP], extack);
434		if (err)
435			return err;
436	}
437	if (data[IFLA_BOND_NUM_PEER_NOTIF]) {
438		int num_peer_notif =
439			nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]);
440
441		bond_opt_initval(&newval, num_peer_notif);
442		err = __bond_opt_set(bond, BOND_OPT_NUM_PEER_NOTIF, &newval,
443				     data[IFLA_BOND_NUM_PEER_NOTIF], extack);
444		if (err)
445			return err;
446	}
447	if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) {
448		int all_slaves_active =
449			nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]);
450
451		bond_opt_initval(&newval, all_slaves_active);
452		err = __bond_opt_set(bond, BOND_OPT_ALL_SLAVES_ACTIVE, &newval,
453				     data[IFLA_BOND_ALL_SLAVES_ACTIVE], extack);
454		if (err)
455			return err;
456	}
457	if (data[IFLA_BOND_MIN_LINKS]) {
458		int min_links =
459			nla_get_u32(data[IFLA_BOND_MIN_LINKS]);
460
461		bond_opt_initval(&newval, min_links);
462		err = __bond_opt_set(bond, BOND_OPT_MINLINKS, &newval,
463				     data[IFLA_BOND_MIN_LINKS], extack);
464		if (err)
465			return err;
466	}
467	if (data[IFLA_BOND_LP_INTERVAL]) {
468		int lp_interval =
469			nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);
470
471		bond_opt_initval(&newval, lp_interval);
472		err = __bond_opt_set(bond, BOND_OPT_LP_INTERVAL, &newval,
473				     data[IFLA_BOND_LP_INTERVAL], extack);
474		if (err)
475			return err;
476	}
477	if (data[IFLA_BOND_PACKETS_PER_SLAVE]) {
478		int packets_per_slave =
479			nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]);
480
481		bond_opt_initval(&newval, packets_per_slave);
482		err = __bond_opt_set(bond, BOND_OPT_PACKETS_PER_SLAVE, &newval,
483				     data[IFLA_BOND_PACKETS_PER_SLAVE], extack);
484		if (err)
485			return err;
486	}
487
488	if (data[IFLA_BOND_AD_LACP_ACTIVE]) {
489		int lacp_active = nla_get_u8(data[IFLA_BOND_AD_LACP_ACTIVE]);
490
491		bond_opt_initval(&newval, lacp_active);
492		err = __bond_opt_set(bond, BOND_OPT_LACP_ACTIVE, &newval,
493				     data[IFLA_BOND_AD_LACP_ACTIVE], extack);
494		if (err)
495			return err;
496	}
497
498	if (data[IFLA_BOND_AD_LACP_RATE]) {
499		int lacp_rate =
500			nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]);
501
502		bond_opt_initval(&newval, lacp_rate);
503		err = __bond_opt_set(bond, BOND_OPT_LACP_RATE, &newval,
504				     data[IFLA_BOND_AD_LACP_RATE], extack);
505		if (err)
506			return err;
507	}
508	if (data[IFLA_BOND_AD_SELECT]) {
509		int ad_select =
510			nla_get_u8(data[IFLA_BOND_AD_SELECT]);
511
512		bond_opt_initval(&newval, ad_select);
513		err = __bond_opt_set(bond, BOND_OPT_AD_SELECT, &newval,
514				     data[IFLA_BOND_AD_SELECT], extack);
515		if (err)
516			return err;
517	}
518	if (data[IFLA_BOND_AD_ACTOR_SYS_PRIO]) {
519		int actor_sys_prio =
520			nla_get_u16(data[IFLA_BOND_AD_ACTOR_SYS_PRIO]);
521
522		bond_opt_initval(&newval, actor_sys_prio);
523		err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYS_PRIO, &newval,
524				     data[IFLA_BOND_AD_ACTOR_SYS_PRIO], extack);
525		if (err)
526			return err;
527	}
528	if (data[IFLA_BOND_AD_USER_PORT_KEY]) {
529		int port_key =
530			nla_get_u16(data[IFLA_BOND_AD_USER_PORT_KEY]);
531
532		bond_opt_initval(&newval, port_key);
533		err = __bond_opt_set(bond, BOND_OPT_AD_USER_PORT_KEY, &newval,
534				     data[IFLA_BOND_AD_USER_PORT_KEY], extack);
535		if (err)
536			return err;
537	}
538	if (data[IFLA_BOND_AD_ACTOR_SYSTEM]) {
539		if (nla_len(data[IFLA_BOND_AD_ACTOR_SYSTEM]) != ETH_ALEN)
540			return -EINVAL;
541
542		bond_opt_initval(&newval,
543				 nla_get_u64(data[IFLA_BOND_AD_ACTOR_SYSTEM]));
544		err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYSTEM, &newval,
545				     data[IFLA_BOND_AD_ACTOR_SYSTEM], extack);
546		if (err)
547			return err;
548	}
549	if (data[IFLA_BOND_TLB_DYNAMIC_LB]) {
550		int dynamic_lb = nla_get_u8(data[IFLA_BOND_TLB_DYNAMIC_LB]);
551
552		bond_opt_initval(&newval, dynamic_lb);
553		err = __bond_opt_set(bond, BOND_OPT_TLB_DYNAMIC_LB, &newval,
554				     data[IFLA_BOND_TLB_DYNAMIC_LB], extack);
555		if (err)
556			return err;
557	}
558
559	if (data[IFLA_BOND_MISSED_MAX]) {
560		int missed_max = nla_get_u8(data[IFLA_BOND_MISSED_MAX]);
561
562		bond_opt_initval(&newval, missed_max);
563		err = __bond_opt_set(bond, BOND_OPT_MISSED_MAX, &newval,
564				     data[IFLA_BOND_MISSED_MAX], extack);
565		if (err)
566			return err;
567	}
568
569	if (data[IFLA_BOND_COUPLED_CONTROL]) {
570		int coupled_control = nla_get_u8(data[IFLA_BOND_COUPLED_CONTROL]);
571
572		bond_opt_initval(&newval, coupled_control);
573		err = __bond_opt_set(bond, BOND_OPT_COUPLED_CONTROL, &newval,
574				     data[IFLA_BOND_COUPLED_CONTROL], extack);
575		if (err)
576			return err;
577	}
578
579	if (data[IFLA_BOND_BROADCAST_NEIGH]) {
580		int broadcast_neigh = nla_get_u8(data[IFLA_BOND_BROADCAST_NEIGH]);
581
582		bond_opt_initval(&newval, broadcast_neigh);
583		err = __bond_opt_set(bond, BOND_OPT_BROADCAST_NEIGH, &newval,
584				     data[IFLA_BOND_BROADCAST_NEIGH], extack);
585		if (err)
586			return err;
587	}
588
589	return 0;
590}
591
592static int bond_newlink(struct net_device *bond_dev,
593			struct rtnl_newlink_params *params,
594			struct netlink_ext_ack *extack)
595{
596	struct bonding *bond = netdev_priv(bond_dev);
597	struct nlattr **data = params->data;
598	struct nlattr **tb = params->tb;
599	int err;
600
601	err = register_netdevice(bond_dev);
602	if (err)
603		return err;
604
605	netif_carrier_off(bond_dev);
606	bond_work_init_all(bond);
607
608	err = bond_changelink(bond_dev, tb, data, extack);
609	if (err) {
610		bond_work_cancel_all(bond);
611		unregister_netdevice(bond_dev);
612	}
613
614	return err;
615}
616
617static size_t bond_get_size(const struct net_device *bond_dev)
618{
619	return nla_total_size(sizeof(u8)) +	/* IFLA_BOND_MODE */
620		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ACTIVE_SLAVE */
621		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_MIIMON */
622		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_UPDELAY */
623		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_DOWNDELAY */
624		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_USE_CARRIER */
625		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ARP_INTERVAL */
626						/* IFLA_BOND_ARP_IP_TARGET */
627		nla_total_size(sizeof(struct nlattr)) +
628		nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
629		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ARP_VALIDATE */
630		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ARP_ALL_TARGETS */
631		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_PRIMARY */
632		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_PRIMARY_RESELECT */
633		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_FAIL_OVER_MAC */
634		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_XMIT_HASH_POLICY */
635		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_RESEND_IGMP */
636		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_NUM_PEER_NOTIF */
637		nla_total_size(sizeof(u8)) +   /* IFLA_BOND_ALL_SLAVES_ACTIVE */
638		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_MIN_LINKS */
639		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_LP_INTERVAL */
640		nla_total_size(sizeof(u32)) +  /* IFLA_BOND_PACKETS_PER_SLAVE */
641		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_AD_LACP_ACTIVE */
642		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_AD_LACP_RATE */
643		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_AD_SELECT */
644		nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */
645		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */
646		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */
647		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */
648		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/
649		nla_total_size(ETH_ALEN) +    /* IFLA_BOND_AD_INFO_PARTNER_MAC*/
650		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_ACTOR_SYS_PRIO */
651		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_USER_PORT_KEY */
652		nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_ACTOR_SYSTEM */
653		nla_total_size(sizeof(u8)) + /* IFLA_BOND_TLB_DYNAMIC_LB */
654		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_PEER_NOTIF_DELAY */
655		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_MISSED_MAX */
656						/* IFLA_BOND_NS_IP6_TARGET */
657		nla_total_size(sizeof(struct nlattr)) +
658		nla_total_size(sizeof(struct in6_addr)) * BOND_MAX_NS_TARGETS +
659		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_COUPLED_CONTROL */
660		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_BROADCAST_NEIGH */
661		0;
662}
663
664static int bond_option_active_slave_get_ifindex(struct bonding *bond)
665{
666	const struct net_device *slave;
667	int ifindex;
668
669	rcu_read_lock();
670	slave = bond_option_active_slave_get_rcu(bond);
671	ifindex = slave ? slave->ifindex : 0;
672	rcu_read_unlock();
673	return ifindex;
674}
675
676static int bond_fill_info(struct sk_buff *skb,
677			  const struct net_device *bond_dev)
678{
679	struct bonding *bond = netdev_priv(bond_dev);
680	unsigned int packets_per_slave;
681	int ifindex, i, targets_added;
682	struct nlattr *targets;
683	struct slave *primary;
684
685	if (nla_put_u8(skb, IFLA_BOND_MODE, BOND_MODE(bond)))
686		goto nla_put_failure;
687
688	ifindex = bond_option_active_slave_get_ifindex(bond);
689	if (ifindex && nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, ifindex))
690		goto nla_put_failure;
691
692	if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon))
693		goto nla_put_failure;
694
695	if (nla_put_u32(skb, IFLA_BOND_UPDELAY,
696			bond->params.updelay * bond->params.miimon))
697		goto nla_put_failure;
698
699	if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY,
700			bond->params.downdelay * bond->params.miimon))
701		goto nla_put_failure;
702
703	if (nla_put_u32(skb, IFLA_BOND_PEER_NOTIF_DELAY,
704			bond->params.peer_notif_delay * bond->params.miimon))
705		goto nla_put_failure;
706
707	if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, 1))
708		goto nla_put_failure;
709
710	if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
711		goto nla_put_failure;
712
713	targets = nla_nest_start_noflag(skb, IFLA_BOND_ARP_IP_TARGET);
714	if (!targets)
715		goto nla_put_failure;
716
717	targets_added = 0;
718	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
719		if (bond->params.arp_targets[i]) {
720			if (nla_put_be32(skb, i, bond->params.arp_targets[i]))
721				goto nla_put_failure;
722			targets_added = 1;
723		}
724	}
725
726	if (targets_added)
727		nla_nest_end(skb, targets);
728	else
729		nla_nest_cancel(skb, targets);
730
731	if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate))
732		goto nla_put_failure;
733
734	if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS,
735			bond->params.arp_all_targets))
736		goto nla_put_failure;
737
738#if IS_ENABLED(CONFIG_IPV6)
739	targets = nla_nest_start(skb, IFLA_BOND_NS_IP6_TARGET);
740	if (!targets)
741		goto nla_put_failure;
742
743	targets_added = 0;
744	for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
745		if (!ipv6_addr_any(&bond->params.ns_targets[i])) {
746			if (nla_put_in6_addr(skb, i, &bond->params.ns_targets[i]))
747				goto nla_put_failure;
748			targets_added = 1;
749		}
750	}
751
752	if (targets_added)
753		nla_nest_end(skb, targets);
754	else
755		nla_nest_cancel(skb, targets);
756#endif
757
758	primary = rtnl_dereference(bond->primary_slave);
759	if (primary &&
760	    nla_put_u32(skb, IFLA_BOND_PRIMARY, primary->dev->ifindex))
761		goto nla_put_failure;
762
763	if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT,
764		       bond->params.primary_reselect))
765		goto nla_put_failure;
766
767	if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC,
768		       bond->params.fail_over_mac))
769		goto nla_put_failure;
770
771	if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY,
772		       bond->params.xmit_policy))
773		goto nla_put_failure;
774
775	if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP,
776			bond->params.resend_igmp))
777		goto nla_put_failure;
778
779	if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF,
780		       bond->params.num_peer_notif))
781		goto nla_put_failure;
782
783	if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE,
784		       bond->params.all_slaves_active))
785		goto nla_put_failure;
786
787	if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS,
788			bond->params.min_links))
789		goto nla_put_failure;
790
791	if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
792			bond->params.lp_interval))
793		goto nla_put_failure;
794
795	packets_per_slave = bond->params.packets_per_slave;
796	if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE,
797			packets_per_slave))
798		goto nla_put_failure;
799
800	if (nla_put_u8(skb, IFLA_BOND_AD_LACP_ACTIVE,
801		       bond->params.lacp_active))
802		goto nla_put_failure;
803
804	if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE,
805		       bond->params.lacp_fast))
806		goto nla_put_failure;
807
808	if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
809		       bond->params.ad_select))
810		goto nla_put_failure;
811
812	if (nla_put_u8(skb, IFLA_BOND_TLB_DYNAMIC_LB,
813		       bond->params.tlb_dynamic_lb))
814		goto nla_put_failure;
815
816	if (nla_put_u8(skb, IFLA_BOND_MISSED_MAX,
817		       bond->params.missed_max))
818		goto nla_put_failure;
819
820	if (nla_put_u8(skb, IFLA_BOND_COUPLED_CONTROL,
821		       bond->params.coupled_control))
822		goto nla_put_failure;
823
824	if (nla_put_u8(skb, IFLA_BOND_BROADCAST_NEIGH,
825		       bond->params.broadcast_neighbor))
826		goto nla_put_failure;
827
828	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
829		struct ad_info info;
830
831		if (capable(CAP_NET_ADMIN)) {
832			if (nla_put_u16(skb, IFLA_BOND_AD_ACTOR_SYS_PRIO,
833					bond->params.ad_actor_sys_prio))
834				goto nla_put_failure;
835
836			if (nla_put_u16(skb, IFLA_BOND_AD_USER_PORT_KEY,
837					bond->params.ad_user_port_key))
838				goto nla_put_failure;
839
840			if (nla_put(skb, IFLA_BOND_AD_ACTOR_SYSTEM,
841				    ETH_ALEN, &bond->params.ad_actor_system))
842				goto nla_put_failure;
843		}
844		if (!bond_3ad_get_active_agg_info(bond, &info)) {
845			struct nlattr *nest;
846
847			nest = nla_nest_start_noflag(skb, IFLA_BOND_AD_INFO);
848			if (!nest)
849				goto nla_put_failure;
850
851			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR,
852					info.aggregator_id))
853				goto nla_put_failure;
854			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS,
855					info.ports))
856				goto nla_put_failure;
857			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY,
858					info.actor_key))
859				goto nla_put_failure;
860			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY,
861					info.partner_key))
862				goto nla_put_failure;
863			if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC,
864				    sizeof(info.partner_system),
865				    &info.partner_system))
866				goto nla_put_failure;
867
868			nla_nest_end(skb, nest);
869		}
870	}
871
872	return 0;
873
874nla_put_failure:
875	return -EMSGSIZE;
876}
877
878static size_t bond_get_linkxstats_size(const struct net_device *dev, int attr)
879{
880	switch (attr) {
881	case IFLA_STATS_LINK_XSTATS:
882	case IFLA_STATS_LINK_XSTATS_SLAVE:
883		break;
884	default:
885		return 0;
886	}
887
888	return bond_3ad_stats_size() + nla_total_size(0);
889}
890
891static int bond_fill_linkxstats(struct sk_buff *skb,
892				const struct net_device *dev,
893				int *prividx, int attr)
894{
895	struct nlattr *nla __maybe_unused;
896	struct slave *slave = NULL;
897	struct nlattr *nest, *nest2;
898	struct bonding *bond;
899
900	switch (attr) {
901	case IFLA_STATS_LINK_XSTATS:
902		bond = netdev_priv(dev);
903		break;
904	case IFLA_STATS_LINK_XSTATS_SLAVE:
905		slave = bond_slave_get_rtnl(dev);
906		if (!slave)
907			return 0;
908		bond = slave->bond;
909		break;
910	default:
911		return -EINVAL;
912	}
913
914	nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BOND);
915	if (!nest)
916		return -EMSGSIZE;
917	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
918		struct bond_3ad_stats *stats;
919
920		if (slave)
921			stats = &SLAVE_AD_INFO(slave)->stats;
922		else
923			stats = &BOND_AD_INFO(bond).stats;
924
925		nest2 = nla_nest_start_noflag(skb, BOND_XSTATS_3AD);
926		if (!nest2) {
927			nla_nest_end(skb, nest);
928			return -EMSGSIZE;
929		}
930
931		if (bond_3ad_stats_fill(skb, stats)) {
932			nla_nest_cancel(skb, nest2);
933			nla_nest_end(skb, nest);
934			return -EMSGSIZE;
935		}
936		nla_nest_end(skb, nest2);
937	}
938	nla_nest_end(skb, nest);
939
940	return 0;
941}
942
943struct rtnl_link_ops bond_link_ops __read_mostly = {
944	.kind			= "bond",
945	.priv_size		= sizeof(struct bonding),
946	.setup			= bond_setup,
947	.maxtype		= IFLA_BOND_MAX,
948	.policy			= bond_policy,
949	.validate		= bond_validate,
950	.newlink		= bond_newlink,
951	.changelink		= bond_changelink,
952	.get_size		= bond_get_size,
953	.fill_info		= bond_fill_info,
954	.get_num_tx_queues	= bond_get_num_tx_queues,
955	.get_num_rx_queues	= bond_get_num_tx_queues, /* Use the same number
956							     as for TX queues */
957	.fill_linkxstats        = bond_fill_linkxstats,
958	.get_linkxstats_size    = bond_get_linkxstats_size,
959	.slave_maxtype		= IFLA_BOND_SLAVE_MAX,
960	.slave_policy		= bond_slave_policy,
961	.slave_changelink	= bond_slave_changelink,
962	.get_slave_size		= bond_get_slave_size,
963	.fill_slave_info	= bond_fill_slave_info,
964};
965
966int __init bond_netlink_init(void)
967{
968	return rtnl_link_register(&bond_link_ops);
969}
970
971void bond_netlink_fini(void)
972{
973	rtnl_link_unregister(&bond_link_ops);
974}
975
976MODULE_ALIAS_RTNL_LINK("bond");