1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
4  */
5 
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7 
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/device.h>
11 #include <linux/sched/signal.h>
12 #include <linux/fs.h>
13 #include <linux/types.h>
14 #include <linux/string.h>
15 #include <linux/netdevice.h>
16 #include <linux/inetdevice.h>
17 #include <linux/in.h>
18 #include <linux/sysfs.h>
19 #include <linux/ctype.h>
20 #include <linux/inet.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/etherdevice.h>
23 #include <net/net_namespace.h>
24 #include <net/netns/generic.h>
25 #include <linux/nsproxy.h>
26 
27 #include <net/bonding.h>
28 
29 #define to_bond(cd)	((struct bonding *)(netdev_priv(to_net_dev(cd))))
30 
31 /* "show" function for the bond_masters attribute.
32  * The class parameter is ignored.
33  */
bonding_show_bonds(const struct class * cls,const struct class_attribute * attr,char * buf)34 static ssize_t bonding_show_bonds(const struct class *cls,
35 				  const struct class_attribute *attr,
36 				  char *buf)
37 {
38 	const struct bond_net *bn =
39 		container_of_const(attr, struct bond_net, class_attr_bonding_masters);
40 	int res = 0;
41 	struct bonding *bond;
42 
43 	rtnl_lock();
44 
45 	list_for_each_entry(bond, &bn->dev_list, bond_list) {
46 		if (res > (PAGE_SIZE - IFNAMSIZ)) {
47 			/* not enough space for another interface name */
48 			if ((PAGE_SIZE - res) > 10)
49 				res = PAGE_SIZE - 10;
50 			res += sysfs_emit_at(buf, res, "++more++ ");
51 			break;
52 		}
53 		res += sysfs_emit_at(buf, res, "%s ", bond->dev->name);
54 	}
55 	if (res)
56 		buf[res-1] = '\n'; /* eat the leftover space */
57 
58 	rtnl_unlock();
59 	return res;
60 }
61 
bond_get_by_name(const struct bond_net * bn,const char * ifname)62 static struct net_device *bond_get_by_name(const struct bond_net *bn, const char *ifname)
63 {
64 	struct bonding *bond;
65 
66 	list_for_each_entry(bond, &bn->dev_list, bond_list) {
67 		if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
68 			return bond->dev;
69 	}
70 	return NULL;
71 }
72 
73 /* "store" function for the bond_masters attribute.  This is what
74  * creates and deletes entire bonds.
75  *
76  * The class parameter is ignored.
77  */
bonding_store_bonds(const struct class * cls,const struct class_attribute * attr,const char * buffer,size_t count)78 static ssize_t bonding_store_bonds(const struct class *cls,
79 				   const struct class_attribute *attr,
80 				   const char *buffer, size_t count)
81 {
82 	const struct bond_net *bn =
83 		container_of_const(attr, struct bond_net, class_attr_bonding_masters);
84 	char command[IFNAMSIZ + 1] = {0, };
85 	char *ifname;
86 	int rv, res = count;
87 
88 	sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
89 	ifname = command + 1;
90 	if ((strlen(command) <= 1) ||
91 	    !dev_valid_name(ifname))
92 		goto err_no_cmd;
93 
94 	if (command[0] == '+') {
95 		pr_info("%s is being created...\n", ifname);
96 		rv = bond_create(bn->net, ifname);
97 		if (rv) {
98 			if (rv == -EEXIST)
99 				pr_info("%s already exists\n", ifname);
100 			else
101 				pr_info("%s creation failed\n", ifname);
102 			res = rv;
103 		}
104 	} else if (command[0] == '-') {
105 		struct net_device *bond_dev;
106 
107 		rtnl_lock();
108 		bond_dev = bond_get_by_name(bn, ifname);
109 		if (bond_dev) {
110 			pr_info("%s is being deleted...\n", ifname);
111 			unregister_netdevice(bond_dev);
112 		} else {
113 			pr_err("unable to delete non-existent %s\n", ifname);
114 			res = -ENODEV;
115 		}
116 		rtnl_unlock();
117 	} else
118 		goto err_no_cmd;
119 
120 	/* Always return either count or an error.  If you return 0, you'll
121 	 * get called forever, which is bad.
122 	 */
123 	return res;
124 
125 err_no_cmd:
126 	pr_err("no command found in bonding_masters - use +ifname or -ifname\n");
127 	return -EPERM;
128 }
129 
130 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
131 static const struct class_attribute class_attr_bonding_masters = {
132 	.attr = {
133 		.name = "bonding_masters",
134 		.mode = 0644,
135 	},
136 	.show = bonding_show_bonds,
137 	.store = bonding_store_bonds,
138 };
139 
140 /* Generic "store" method for bonding sysfs option setting */
bonding_sysfs_store_option(struct device * d,struct device_attribute * attr,const char * buffer,size_t count)141 static ssize_t bonding_sysfs_store_option(struct device *d,
142 					  struct device_attribute *attr,
143 					  const char *buffer, size_t count)
144 {
145 	struct bonding *bond = to_bond(d);
146 	const struct bond_option *opt;
147 	char *buffer_clone;
148 	int ret;
149 
150 	opt = bond_opt_get_by_name(attr->attr.name);
151 	if (WARN_ON(!opt))
152 		return -ENOENT;
153 	buffer_clone = kstrndup(buffer, count, GFP_KERNEL);
154 	if (!buffer_clone)
155 		return -ENOMEM;
156 	ret = bond_opt_tryset_rtnl(bond, opt->id, buffer_clone);
157 	if (!ret)
158 		ret = count;
159 	kfree(buffer_clone);
160 
161 	return ret;
162 }
163 
164 /* Show the slaves in the current bond. */
bonding_show_slaves(struct device * d,struct device_attribute * attr,char * buf)165 static ssize_t bonding_show_slaves(struct device *d,
166 				   struct device_attribute *attr, char *buf)
167 {
168 	struct bonding *bond = to_bond(d);
169 	struct list_head *iter;
170 	struct slave *slave;
171 	int res = 0;
172 
173 	if (!rtnl_trylock())
174 		return restart_syscall();
175 
176 	bond_for_each_slave(bond, slave, iter) {
177 		if (res > (PAGE_SIZE - IFNAMSIZ)) {
178 			/* not enough space for another interface name */
179 			if ((PAGE_SIZE - res) > 10)
180 				res = PAGE_SIZE - 10;
181 			res += sysfs_emit_at(buf, res, "++more++ ");
182 			break;
183 		}
184 		res += sysfs_emit_at(buf, res, "%s ", slave->dev->name);
185 	}
186 
187 	rtnl_unlock();
188 
189 	if (res)
190 		buf[res-1] = '\n'; /* eat the leftover space */
191 
192 	return res;
193 }
194 static DEVICE_ATTR(slaves, 0644, bonding_show_slaves,
195 		   bonding_sysfs_store_option);
196 
197 /* Show the bonding mode. */
bonding_show_mode(struct device * d,struct device_attribute * attr,char * buf)198 static ssize_t bonding_show_mode(struct device *d,
199 				 struct device_attribute *attr, char *buf)
200 {
201 	struct bonding *bond = to_bond(d);
202 	const struct bond_opt_value *val;
203 
204 	val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond));
205 
206 	return sysfs_emit(buf, "%s %d\n", val->string, BOND_MODE(bond));
207 }
208 static DEVICE_ATTR(mode, 0644, bonding_show_mode, bonding_sysfs_store_option);
209 
210 /* Show the bonding transmit hash method. */
bonding_show_xmit_hash(struct device * d,struct device_attribute * attr,char * buf)211 static ssize_t bonding_show_xmit_hash(struct device *d,
212 				      struct device_attribute *attr,
213 				      char *buf)
214 {
215 	struct bonding *bond = to_bond(d);
216 	const struct bond_opt_value *val;
217 
218 	val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
219 
220 	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.xmit_policy);
221 }
222 static DEVICE_ATTR(xmit_hash_policy, 0644,
223 		   bonding_show_xmit_hash, bonding_sysfs_store_option);
224 
225 /* Show arp_validate. */
bonding_show_arp_validate(struct device * d,struct device_attribute * attr,char * buf)226 static ssize_t bonding_show_arp_validate(struct device *d,
227 					 struct device_attribute *attr,
228 					 char *buf)
229 {
230 	struct bonding *bond = to_bond(d);
231 	const struct bond_opt_value *val;
232 
233 	val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
234 			       bond->params.arp_validate);
235 
236 	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.arp_validate);
237 }
238 static DEVICE_ATTR(arp_validate, 0644, bonding_show_arp_validate,
239 		   bonding_sysfs_store_option);
240 
241 /* Show arp_all_targets. */
bonding_show_arp_all_targets(struct device * d,struct device_attribute * attr,char * buf)242 static ssize_t bonding_show_arp_all_targets(struct device *d,
243 					 struct device_attribute *attr,
244 					 char *buf)
245 {
246 	struct bonding *bond = to_bond(d);
247 	const struct bond_opt_value *val;
248 
249 	val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
250 			       bond->params.arp_all_targets);
251 	return sysfs_emit(buf, "%s %d\n",
252 		       val->string, bond->params.arp_all_targets);
253 }
254 static DEVICE_ATTR(arp_all_targets, 0644,
255 		   bonding_show_arp_all_targets, bonding_sysfs_store_option);
256 
257 /* Show fail_over_mac. */
bonding_show_fail_over_mac(struct device * d,struct device_attribute * attr,char * buf)258 static ssize_t bonding_show_fail_over_mac(struct device *d,
259 					  struct device_attribute *attr,
260 					  char *buf)
261 {
262 	struct bonding *bond = to_bond(d);
263 	const struct bond_opt_value *val;
264 
265 	val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
266 			       bond->params.fail_over_mac);
267 
268 	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
269 }
270 static DEVICE_ATTR(fail_over_mac, 0644,
271 		   bonding_show_fail_over_mac, bonding_sysfs_store_option);
272 
273 /* Show the arp timer interval. */
bonding_show_arp_interval(struct device * d,struct device_attribute * attr,char * buf)274 static ssize_t bonding_show_arp_interval(struct device *d,
275 					 struct device_attribute *attr,
276 					 char *buf)
277 {
278 	struct bonding *bond = to_bond(d);
279 
280 	return sysfs_emit(buf, "%d\n", bond->params.arp_interval);
281 }
282 static DEVICE_ATTR(arp_interval, 0644,
283 		   bonding_show_arp_interval, bonding_sysfs_store_option);
284 
285 /* Show the arp targets. */
bonding_show_arp_targets(struct device * d,struct device_attribute * attr,char * buf)286 static ssize_t bonding_show_arp_targets(struct device *d,
287 					struct device_attribute *attr,
288 					char *buf)
289 {
290 	struct bonding *bond = to_bond(d);
291 	int i, res = 0;
292 
293 	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
294 		if (bond->params.arp_targets[i])
295 			res += sysfs_emit_at(buf, res, "%pI4 ",
296 					     &bond->params.arp_targets[i]);
297 	}
298 	if (res)
299 		buf[res-1] = '\n'; /* eat the leftover space */
300 
301 	return res;
302 }
303 static DEVICE_ATTR(arp_ip_target, 0644,
304 		   bonding_show_arp_targets, bonding_sysfs_store_option);
305 
306 /* Show the arp missed max. */
bonding_show_missed_max(struct device * d,struct device_attribute * attr,char * buf)307 static ssize_t bonding_show_missed_max(struct device *d,
308 				       struct device_attribute *attr,
309 				       char *buf)
310 {
311 	struct bonding *bond = to_bond(d);
312 
313 	return sysfs_emit(buf, "%u\n", bond->params.missed_max);
314 }
315 static DEVICE_ATTR(arp_missed_max, 0644,
316 		   bonding_show_missed_max, bonding_sysfs_store_option);
317 
318 /* Show the up and down delays. */
bonding_show_downdelay(struct device * d,struct device_attribute * attr,char * buf)319 static ssize_t bonding_show_downdelay(struct device *d,
320 				      struct device_attribute *attr,
321 				      char *buf)
322 {
323 	struct bonding *bond = to_bond(d);
324 
325 	return sysfs_emit(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
326 }
327 static DEVICE_ATTR(downdelay, 0644,
328 		   bonding_show_downdelay, bonding_sysfs_store_option);
329 
bonding_show_updelay(struct device * d,struct device_attribute * attr,char * buf)330 static ssize_t bonding_show_updelay(struct device *d,
331 				    struct device_attribute *attr,
332 				    char *buf)
333 {
334 	struct bonding *bond = to_bond(d);
335 
336 	return sysfs_emit(buf, "%d\n", bond->params.updelay * bond->params.miimon);
337 
338 }
339 static DEVICE_ATTR(updelay, 0644,
340 		   bonding_show_updelay, bonding_sysfs_store_option);
341 
bonding_show_peer_notif_delay(struct device * d,struct device_attribute * attr,char * buf)342 static ssize_t bonding_show_peer_notif_delay(struct device *d,
343 					     struct device_attribute *attr,
344 					     char *buf)
345 {
346 	struct bonding *bond = to_bond(d);
347 
348 	return sysfs_emit(buf, "%d\n",
349 			  bond->params.peer_notif_delay * bond->params.miimon);
350 }
351 static DEVICE_ATTR(peer_notif_delay, 0644,
352 		   bonding_show_peer_notif_delay, bonding_sysfs_store_option);
353 
354 /* Show the LACP activity and interval. */
bonding_show_lacp_active(struct device * d,struct device_attribute * attr,char * buf)355 static ssize_t bonding_show_lacp_active(struct device *d,
356 					struct device_attribute *attr,
357 					char *buf)
358 {
359 	struct bonding *bond = to_bond(d);
360 	const struct bond_opt_value *val;
361 
362 	val = bond_opt_get_val(BOND_OPT_LACP_ACTIVE, bond->params.lacp_active);
363 
364 	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.lacp_active);
365 }
366 static DEVICE_ATTR(lacp_active, 0644,
367 		   bonding_show_lacp_active, bonding_sysfs_store_option);
368 
bonding_show_lacp_rate(struct device * d,struct device_attribute * attr,char * buf)369 static ssize_t bonding_show_lacp_rate(struct device *d,
370 				      struct device_attribute *attr,
371 				      char *buf)
372 {
373 	struct bonding *bond = to_bond(d);
374 	const struct bond_opt_value *val;
375 
376 	val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
377 
378 	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.lacp_fast);
379 }
380 static DEVICE_ATTR(lacp_rate, 0644,
381 		   bonding_show_lacp_rate, bonding_sysfs_store_option);
382 
bonding_show_min_links(struct device * d,struct device_attribute * attr,char * buf)383 static ssize_t bonding_show_min_links(struct device *d,
384 				      struct device_attribute *attr,
385 				      char *buf)
386 {
387 	struct bonding *bond = to_bond(d);
388 
389 	return sysfs_emit(buf, "%u\n", bond->params.min_links);
390 }
391 static DEVICE_ATTR(min_links, 0644,
392 		   bonding_show_min_links, bonding_sysfs_store_option);
393 
bonding_show_ad_select(struct device * d,struct device_attribute * attr,char * buf)394 static ssize_t bonding_show_ad_select(struct device *d,
395 				      struct device_attribute *attr,
396 				      char *buf)
397 {
398 	struct bonding *bond = to_bond(d);
399 	const struct bond_opt_value *val;
400 
401 	val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
402 
403 	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.ad_select);
404 }
405 static DEVICE_ATTR(ad_select, 0644,
406 		   bonding_show_ad_select, bonding_sysfs_store_option);
407 
408 /* Show the number of peer notifications to send after a failover event. */
bonding_show_num_peer_notif(struct device * d,struct device_attribute * attr,char * buf)409 static ssize_t bonding_show_num_peer_notif(struct device *d,
410 					   struct device_attribute *attr,
411 					   char *buf)
412 {
413 	struct bonding *bond = to_bond(d);
414 
415 	return sysfs_emit(buf, "%d\n", bond->params.num_peer_notif);
416 }
417 static DEVICE_ATTR(num_grat_arp, 0644,
418 		   bonding_show_num_peer_notif, bonding_sysfs_store_option);
419 static DEVICE_ATTR(num_unsol_na, 0644,
420 		   bonding_show_num_peer_notif, bonding_sysfs_store_option);
421 
422 /* Show the MII monitor interval. */
bonding_show_miimon(struct device * d,struct device_attribute * attr,char * buf)423 static ssize_t bonding_show_miimon(struct device *d,
424 				   struct device_attribute *attr,
425 				   char *buf)
426 {
427 	struct bonding *bond = to_bond(d);
428 
429 	return sysfs_emit(buf, "%d\n", bond->params.miimon);
430 }
431 static DEVICE_ATTR(miimon, 0644,
432 		   bonding_show_miimon, bonding_sysfs_store_option);
433 
434 /* Show the primary slave. */
bonding_show_primary(struct device * d,struct device_attribute * attr,char * buf)435 static ssize_t bonding_show_primary(struct device *d,
436 				    struct device_attribute *attr,
437 				    char *buf)
438 {
439 	struct bonding *bond = to_bond(d);
440 	struct slave *primary;
441 	int count = 0;
442 
443 	rcu_read_lock();
444 	primary = rcu_dereference(bond->primary_slave);
445 	if (primary)
446 		count = sysfs_emit(buf, "%s\n", primary->dev->name);
447 	rcu_read_unlock();
448 
449 	return count;
450 }
451 static DEVICE_ATTR(primary, 0644,
452 		   bonding_show_primary, bonding_sysfs_store_option);
453 
454 /* Show the primary_reselect flag. */
bonding_show_primary_reselect(struct device * d,struct device_attribute * attr,char * buf)455 static ssize_t bonding_show_primary_reselect(struct device *d,
456 					     struct device_attribute *attr,
457 					     char *buf)
458 {
459 	struct bonding *bond = to_bond(d);
460 	const struct bond_opt_value *val;
461 
462 	val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
463 			       bond->params.primary_reselect);
464 
465 	return sysfs_emit(buf, "%s %d\n",
466 			  val->string, bond->params.primary_reselect);
467 }
468 static DEVICE_ATTR(primary_reselect, 0644,
469 		   bonding_show_primary_reselect, bonding_sysfs_store_option);
470 
471 /* Show the use_carrier flag. */
bonding_show_carrier(struct device * d,struct device_attribute * attr,char * buf)472 static ssize_t bonding_show_carrier(struct device *d,
473 				    struct device_attribute *attr,
474 				    char *buf)
475 {
476 	struct bonding *bond = to_bond(d);
477 
478 	return sysfs_emit(buf, "%d\n", bond->params.use_carrier);
479 }
480 static DEVICE_ATTR(use_carrier, 0644,
481 		   bonding_show_carrier, bonding_sysfs_store_option);
482 
483 
484 /* Show currently active_slave. */
bonding_show_active_slave(struct device * d,struct device_attribute * attr,char * buf)485 static ssize_t bonding_show_active_slave(struct device *d,
486 					 struct device_attribute *attr,
487 					 char *buf)
488 {
489 	struct bonding *bond = to_bond(d);
490 	struct net_device *slave_dev;
491 	int count = 0;
492 
493 	rcu_read_lock();
494 	slave_dev = bond_option_active_slave_get_rcu(bond);
495 	if (slave_dev)
496 		count = sysfs_emit(buf, "%s\n", slave_dev->name);
497 	rcu_read_unlock();
498 
499 	return count;
500 }
501 static DEVICE_ATTR(active_slave, 0644,
502 		   bonding_show_active_slave, bonding_sysfs_store_option);
503 
504 /* Show link status of the bond interface. */
bonding_show_mii_status(struct device * d,struct device_attribute * attr,char * buf)505 static ssize_t bonding_show_mii_status(struct device *d,
506 				       struct device_attribute *attr,
507 				       char *buf)
508 {
509 	struct bonding *bond = to_bond(d);
510 	bool active = netif_carrier_ok(bond->dev);
511 
512 	return sysfs_emit(buf, "%s\n", active ? "up" : "down");
513 }
514 static DEVICE_ATTR(mii_status, 0444, bonding_show_mii_status, NULL);
515 
516 /* Show current 802.3ad aggregator ID. */
bonding_show_ad_aggregator(struct device * d,struct device_attribute * attr,char * buf)517 static ssize_t bonding_show_ad_aggregator(struct device *d,
518 					  struct device_attribute *attr,
519 					  char *buf)
520 {
521 	int count = 0;
522 	struct bonding *bond = to_bond(d);
523 
524 	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
525 		struct ad_info ad_info;
526 
527 		count = sysfs_emit(buf, "%d\n",
528 				   bond_3ad_get_active_agg_info(bond, &ad_info)
529 				   ?  0 : ad_info.aggregator_id);
530 	}
531 
532 	return count;
533 }
534 static DEVICE_ATTR(ad_aggregator, 0444, bonding_show_ad_aggregator, NULL);
535 
536 
537 /* Show number of active 802.3ad ports. */
bonding_show_ad_num_ports(struct device * d,struct device_attribute * attr,char * buf)538 static ssize_t bonding_show_ad_num_ports(struct device *d,
539 					 struct device_attribute *attr,
540 					 char *buf)
541 {
542 	int count = 0;
543 	struct bonding *bond = to_bond(d);
544 
545 	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
546 		struct ad_info ad_info;
547 
548 		count = sysfs_emit(buf, "%d\n",
549 				   bond_3ad_get_active_agg_info(bond, &ad_info)
550 				   ?  0 : ad_info.ports);
551 	}
552 
553 	return count;
554 }
555 static DEVICE_ATTR(ad_num_ports, 0444, bonding_show_ad_num_ports, NULL);
556 
557 
558 /* Show current 802.3ad actor key. */
bonding_show_ad_actor_key(struct device * d,struct device_attribute * attr,char * buf)559 static ssize_t bonding_show_ad_actor_key(struct device *d,
560 					 struct device_attribute *attr,
561 					 char *buf)
562 {
563 	int count = 0;
564 	struct bonding *bond = to_bond(d);
565 
566 	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
567 		struct ad_info ad_info;
568 
569 		count = sysfs_emit(buf, "%d\n",
570 				   bond_3ad_get_active_agg_info(bond, &ad_info)
571 				   ?  0 : ad_info.actor_key);
572 	}
573 
574 	return count;
575 }
576 static DEVICE_ATTR(ad_actor_key, 0444, bonding_show_ad_actor_key, NULL);
577 
578 
579 /* Show current 802.3ad partner key. */
bonding_show_ad_partner_key(struct device * d,struct device_attribute * attr,char * buf)580 static ssize_t bonding_show_ad_partner_key(struct device *d,
581 					   struct device_attribute *attr,
582 					   char *buf)
583 {
584 	int count = 0;
585 	struct bonding *bond = to_bond(d);
586 
587 	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
588 		struct ad_info ad_info;
589 
590 		count = sysfs_emit(buf, "%d\n",
591 				   bond_3ad_get_active_agg_info(bond, &ad_info)
592 				   ?  0 : ad_info.partner_key);
593 	}
594 
595 	return count;
596 }
597 static DEVICE_ATTR(ad_partner_key, 0444, bonding_show_ad_partner_key, NULL);
598 
599 
600 /* Show current 802.3ad partner mac. */
bonding_show_ad_partner_mac(struct device * d,struct device_attribute * attr,char * buf)601 static ssize_t bonding_show_ad_partner_mac(struct device *d,
602 					   struct device_attribute *attr,
603 					   char *buf)
604 {
605 	int count = 0;
606 	struct bonding *bond = to_bond(d);
607 
608 	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
609 		struct ad_info ad_info;
610 
611 		if (!bond_3ad_get_active_agg_info(bond, &ad_info))
612 			count = sysfs_emit(buf, "%pM\n", ad_info.partner_system);
613 	}
614 
615 	return count;
616 }
617 static DEVICE_ATTR(ad_partner_mac, 0444, bonding_show_ad_partner_mac, NULL);
618 
619 /* Show the queue_ids of the slaves in the current bond. */
bonding_show_queue_id(struct device * d,struct device_attribute * attr,char * buf)620 static ssize_t bonding_show_queue_id(struct device *d,
621 				     struct device_attribute *attr,
622 				     char *buf)
623 {
624 	struct bonding *bond = to_bond(d);
625 	struct list_head *iter;
626 	struct slave *slave;
627 	int res = 0;
628 
629 	if (!rtnl_trylock())
630 		return restart_syscall();
631 
632 	bond_for_each_slave(bond, slave, iter) {
633 		if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
634 			/* not enough space for another interface_name:queue_id pair */
635 			if ((PAGE_SIZE - res) > 10)
636 				res = PAGE_SIZE - 10;
637 			res += sysfs_emit_at(buf, res, "++more++ ");
638 			break;
639 		}
640 		res += sysfs_emit_at(buf, res, "%s:%d ",
641 				     slave->dev->name, slave->queue_id);
642 	}
643 	if (res)
644 		buf[res-1] = '\n'; /* eat the leftover space */
645 
646 	rtnl_unlock();
647 
648 	return res;
649 }
650 static DEVICE_ATTR(queue_id, 0644, bonding_show_queue_id,
651 		   bonding_sysfs_store_option);
652 
653 
654 /* Show the all_slaves_active flag. */
bonding_show_slaves_active(struct device * d,struct device_attribute * attr,char * buf)655 static ssize_t bonding_show_slaves_active(struct device *d,
656 					  struct device_attribute *attr,
657 					  char *buf)
658 {
659 	struct bonding *bond = to_bond(d);
660 
661 	return sysfs_emit(buf, "%d\n", bond->params.all_slaves_active);
662 }
663 static DEVICE_ATTR(all_slaves_active, 0644,
664 		   bonding_show_slaves_active, bonding_sysfs_store_option);
665 
666 /* Show the number of IGMP membership reports to send on link failure */
bonding_show_resend_igmp(struct device * d,struct device_attribute * attr,char * buf)667 static ssize_t bonding_show_resend_igmp(struct device *d,
668 					struct device_attribute *attr,
669 					char *buf)
670 {
671 	struct bonding *bond = to_bond(d);
672 
673 	return sysfs_emit(buf, "%d\n", bond->params.resend_igmp);
674 }
675 static DEVICE_ATTR(resend_igmp, 0644,
676 		   bonding_show_resend_igmp, bonding_sysfs_store_option);
677 
678 
bonding_show_lp_interval(struct device * d,struct device_attribute * attr,char * buf)679 static ssize_t bonding_show_lp_interval(struct device *d,
680 					struct device_attribute *attr,
681 					char *buf)
682 {
683 	struct bonding *bond = to_bond(d);
684 
685 	return sysfs_emit(buf, "%d\n", bond->params.lp_interval);
686 }
687 static DEVICE_ATTR(lp_interval, 0644,
688 		   bonding_show_lp_interval, bonding_sysfs_store_option);
689 
bonding_show_tlb_dynamic_lb(struct device * d,struct device_attribute * attr,char * buf)690 static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
691 					   struct device_attribute *attr,
692 					   char *buf)
693 {
694 	struct bonding *bond = to_bond(d);
695 
696 	return sysfs_emit(buf, "%d\n", bond->params.tlb_dynamic_lb);
697 }
698 static DEVICE_ATTR(tlb_dynamic_lb, 0644,
699 		   bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
700 
bonding_show_packets_per_slave(struct device * d,struct device_attribute * attr,char * buf)701 static ssize_t bonding_show_packets_per_slave(struct device *d,
702 					      struct device_attribute *attr,
703 					      char *buf)
704 {
705 	struct bonding *bond = to_bond(d);
706 	unsigned int packets_per_slave = bond->params.packets_per_slave;
707 
708 	return sysfs_emit(buf, "%u\n", packets_per_slave);
709 }
710 static DEVICE_ATTR(packets_per_slave, 0644,
711 		   bonding_show_packets_per_slave, bonding_sysfs_store_option);
712 
bonding_show_ad_actor_sys_prio(struct device * d,struct device_attribute * attr,char * buf)713 static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
714 					      struct device_attribute *attr,
715 					      char *buf)
716 {
717 	struct bonding *bond = to_bond(d);
718 
719 	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
720 		return sysfs_emit(buf, "%hu\n", bond->params.ad_actor_sys_prio);
721 
722 	return 0;
723 }
724 static DEVICE_ATTR(ad_actor_sys_prio, 0644,
725 		   bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
726 
bonding_show_ad_actor_system(struct device * d,struct device_attribute * attr,char * buf)727 static ssize_t bonding_show_ad_actor_system(struct device *d,
728 					    struct device_attribute *attr,
729 					    char *buf)
730 {
731 	struct bonding *bond = to_bond(d);
732 
733 	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
734 		return sysfs_emit(buf, "%pM\n", bond->params.ad_actor_system);
735 
736 	return 0;
737 }
738 
739 static DEVICE_ATTR(ad_actor_system, 0644,
740 		   bonding_show_ad_actor_system, bonding_sysfs_store_option);
741 
bonding_show_ad_user_port_key(struct device * d,struct device_attribute * attr,char * buf)742 static ssize_t bonding_show_ad_user_port_key(struct device *d,
743 					     struct device_attribute *attr,
744 					     char *buf)
745 {
746 	struct bonding *bond = to_bond(d);
747 
748 	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
749 		return sysfs_emit(buf, "%hu\n", bond->params.ad_user_port_key);
750 
751 	return 0;
752 }
753 static DEVICE_ATTR(ad_user_port_key, 0644,
754 		   bonding_show_ad_user_port_key, bonding_sysfs_store_option);
755 
756 static struct attribute *per_bond_attrs[] = {
757 	&dev_attr_slaves.attr,
758 	&dev_attr_mode.attr,
759 	&dev_attr_fail_over_mac.attr,
760 	&dev_attr_arp_validate.attr,
761 	&dev_attr_arp_all_targets.attr,
762 	&dev_attr_arp_interval.attr,
763 	&dev_attr_arp_ip_target.attr,
764 	&dev_attr_downdelay.attr,
765 	&dev_attr_updelay.attr,
766 	&dev_attr_peer_notif_delay.attr,
767 	&dev_attr_lacp_active.attr,
768 	&dev_attr_lacp_rate.attr,
769 	&dev_attr_ad_select.attr,
770 	&dev_attr_xmit_hash_policy.attr,
771 	&dev_attr_num_grat_arp.attr,
772 	&dev_attr_num_unsol_na.attr,
773 	&dev_attr_miimon.attr,
774 	&dev_attr_primary.attr,
775 	&dev_attr_primary_reselect.attr,
776 	&dev_attr_use_carrier.attr,
777 	&dev_attr_active_slave.attr,
778 	&dev_attr_mii_status.attr,
779 	&dev_attr_ad_aggregator.attr,
780 	&dev_attr_ad_num_ports.attr,
781 	&dev_attr_ad_actor_key.attr,
782 	&dev_attr_ad_partner_key.attr,
783 	&dev_attr_ad_partner_mac.attr,
784 	&dev_attr_queue_id.attr,
785 	&dev_attr_all_slaves_active.attr,
786 	&dev_attr_resend_igmp.attr,
787 	&dev_attr_min_links.attr,
788 	&dev_attr_lp_interval.attr,
789 	&dev_attr_packets_per_slave.attr,
790 	&dev_attr_tlb_dynamic_lb.attr,
791 	&dev_attr_ad_actor_sys_prio.attr,
792 	&dev_attr_ad_actor_system.attr,
793 	&dev_attr_ad_user_port_key.attr,
794 	&dev_attr_arp_missed_max.attr,
795 	NULL,
796 };
797 
798 static const struct attribute_group bonding_group = {
799 	.name = "bonding",
800 	.attrs = per_bond_attrs,
801 };
802 
803 /* Initialize sysfs.  This sets up the bonding_masters file in
804  * /sys/class/net.
805  */
bond_create_sysfs(struct bond_net * bn)806 int __net_init bond_create_sysfs(struct bond_net *bn)
807 {
808 	int ret;
809 
810 	bn->class_attr_bonding_masters = class_attr_bonding_masters;
811 	sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
812 
813 	ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
814 					  bn->net);
815 	/* Permit multiple loads of the module by ignoring failures to
816 	 * create the bonding_masters sysfs file.  Bonding devices
817 	 * created by second or subsequent loads of the module will
818 	 * not be listed in, or controllable by, bonding_masters, but
819 	 * will have the usual "bonding" sysfs directory.
820 	 *
821 	 * This is done to preserve backwards compatibility for
822 	 * initscripts/sysconfig, which load bonding multiple times to
823 	 * configure multiple bonding devices.
824 	 */
825 	if (ret == -EEXIST) {
826 		/* Is someone being kinky and naming a device bonding_master? */
827 		if (netdev_name_in_use(bn->net,
828 				       class_attr_bonding_masters.attr.name))
829 			pr_err("network device named %s already exists in sysfs\n",
830 			       class_attr_bonding_masters.attr.name);
831 		ret = 0;
832 	}
833 
834 	return ret;
835 
836 }
837 
838 /* Remove /sys/class/net/bonding_masters. */
bond_destroy_sysfs(struct bond_net * bn)839 void __net_exit bond_destroy_sysfs(struct bond_net *bn)
840 {
841 	netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
842 }
843 
844 /* Initialize sysfs for each bond.  This sets up and registers
845  * the 'bondctl' directory for each individual bond under /sys/class/net.
846  */
bond_prepare_sysfs_group(struct bonding * bond)847 void bond_prepare_sysfs_group(struct bonding *bond)
848 {
849 	bond->dev->sysfs_groups[0] = &bonding_group;
850 }
851 
852