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
bond_get_slave_size(const struct net_device * bond_dev,const struct net_device * slave_dev)19 static 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
bond_fill_slave_info(struct sk_buff * skb,const struct net_device * bond_dev,const struct net_device * slave_dev)35 static 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
89 nla_put_failure:
90 return -EMSGSIZE;
91 }
92
93 /* Limit the max delay range to 300s */
94 static const struct netlink_range_validation delay_range = {
95 .max = 300000,
96 };
97
98 static 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
135 static 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
bond_validate(struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)141 static 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
bond_slave_changelink(struct net_device * bond_dev,struct net_device * slave_dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)153 static 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
bond_changelink(struct net_device * bond_dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)202 static 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
bond_newlink(struct net_device * bond_dev,struct rtnl_newlink_params * params,struct netlink_ext_ack * extack)592 static 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
bond_get_size(const struct net_device * bond_dev)617 static 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
bond_option_active_slave_get_ifindex(struct bonding * bond)664 static 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
bond_fill_info(struct sk_buff * skb,const struct net_device * bond_dev)676 static 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
874 nla_put_failure:
875 return -EMSGSIZE;
876 }
877
bond_get_linkxstats_size(const struct net_device * dev,int attr)878 static 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
bond_fill_linkxstats(struct sk_buff * skb,const struct net_device * dev,int * prividx,int attr)891 static 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
943 struct 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
bond_netlink_init(void)966 int __init bond_netlink_init(void)
967 {
968 return rtnl_link_register(&bond_link_ops);
969 }
970
bond_netlink_fini(void)971 void bond_netlink_fini(void)
972 {
973 rtnl_link_unregister(&bond_link_ops);
974 }
975
976 MODULE_ALIAS_RTNL_LINK("bond");
977