1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * drivers/net/bond/bond_options.c - bonding options
4  * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
5  * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
6  */
7 
8 #include <linux/errno.h>
9 #include <linux/if.h>
10 #include <linux/netdevice.h>
11 #include <linux/spinlock.h>
12 #include <linux/rcupdate.h>
13 #include <linux/ctype.h>
14 #include <linux/inet.h>
15 #include <linux/sched/signal.h>
16 
17 #include <net/bonding.h>
18 
19 static int bond_option_active_slave_set(struct bonding *bond,
20 					const struct bond_opt_value *newval);
21 static int bond_option_miimon_set(struct bonding *bond,
22 				  const struct bond_opt_value *newval);
23 static int bond_option_updelay_set(struct bonding *bond,
24 				   const struct bond_opt_value *newval);
25 static int bond_option_downdelay_set(struct bonding *bond,
26 				     const struct bond_opt_value *newval);
27 static int bond_option_peer_notif_delay_set(struct bonding *bond,
28 					    const struct bond_opt_value *newval);
29 static int bond_option_use_carrier_set(struct bonding *bond,
30 				       const struct bond_opt_value *newval);
31 static int bond_option_arp_interval_set(struct bonding *bond,
32 					const struct bond_opt_value *newval);
33 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
34 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
35 static int bond_option_arp_ip_targets_set(struct bonding *bond,
36 					  const struct bond_opt_value *newval);
37 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
38 					  const struct bond_opt_value *newval);
39 static int bond_option_arp_validate_set(struct bonding *bond,
40 					const struct bond_opt_value *newval);
41 static int bond_option_arp_all_targets_set(struct bonding *bond,
42 					   const struct bond_opt_value *newval);
43 static int bond_option_primary_set(struct bonding *bond,
44 				   const struct bond_opt_value *newval);
45 static int bond_option_primary_reselect_set(struct bonding *bond,
46 					    const struct bond_opt_value *newval);
47 static int bond_option_fail_over_mac_set(struct bonding *bond,
48 					 const struct bond_opt_value *newval);
49 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
50 					    const struct bond_opt_value *newval);
51 static int bond_option_resend_igmp_set(struct bonding *bond,
52 				       const struct bond_opt_value *newval);
53 static int bond_option_num_peer_notif_set(struct bonding *bond,
54 					  const struct bond_opt_value *newval);
55 static int bond_option_all_slaves_active_set(struct bonding *bond,
56 					     const struct bond_opt_value *newval);
57 static int bond_option_min_links_set(struct bonding *bond,
58 				     const struct bond_opt_value *newval);
59 static int bond_option_lp_interval_set(struct bonding *bond,
60 				       const struct bond_opt_value *newval);
61 static int bond_option_pps_set(struct bonding *bond,
62 			       const struct bond_opt_value *newval);
63 static int bond_option_lacp_active_set(struct bonding *bond,
64 				       const struct bond_opt_value *newval);
65 static int bond_option_lacp_rate_set(struct bonding *bond,
66 				     const struct bond_opt_value *newval);
67 static int bond_option_ad_select_set(struct bonding *bond,
68 				     const struct bond_opt_value *newval);
69 static int bond_option_queue_id_set(struct bonding *bond,
70 				    const struct bond_opt_value *newval);
71 static int bond_option_mode_set(struct bonding *bond,
72 				const struct bond_opt_value *newval);
73 static int bond_option_slaves_set(struct bonding *bond,
74 				  const struct bond_opt_value *newval);
75 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
76 				  const struct bond_opt_value *newval);
77 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
78 					     const struct bond_opt_value *newval);
79 static int bond_option_ad_actor_system_set(struct bonding *bond,
80 					   const struct bond_opt_value *newval);
81 static int bond_option_ad_user_port_key_set(struct bonding *bond,
82 					    const struct bond_opt_value *newval);
83 static int bond_option_missed_max_set(struct bonding *bond,
84 				      const struct bond_opt_value *newval);
85 
86 
87 static const struct bond_opt_value bond_mode_tbl[] = {
88 	{ "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
89 	{ "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
90 	{ "balance-xor",   BOND_MODE_XOR,          0},
91 	{ "broadcast",     BOND_MODE_BROADCAST,    0},
92 	{ "802.3ad",       BOND_MODE_8023AD,       0},
93 	{ "balance-tlb",   BOND_MODE_TLB,          0},
94 	{ "balance-alb",   BOND_MODE_ALB,          0},
95 	{ NULL,            -1,                     0},
96 };
97 
98 static const struct bond_opt_value bond_pps_tbl[] = {
99 	{ "default", 1,         BOND_VALFLAG_DEFAULT},
100 	{ "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
101 	{ NULL,      -1,        0},
102 };
103 
104 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
105 	{ "layer2",      BOND_XMIT_POLICY_LAYER2,      BOND_VALFLAG_DEFAULT},
106 	{ "layer3+4",    BOND_XMIT_POLICY_LAYER34,     0},
107 	{ "layer2+3",    BOND_XMIT_POLICY_LAYER23,     0},
108 	{ "encap2+3",    BOND_XMIT_POLICY_ENCAP23,     0},
109 	{ "encap3+4",    BOND_XMIT_POLICY_ENCAP34,     0},
110 	{ "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},
111 	{ NULL,          -1,                           0},
112 };
113 
114 static const struct bond_opt_value bond_arp_validate_tbl[] = {
115 	{ "none",		BOND_ARP_VALIDATE_NONE,		BOND_VALFLAG_DEFAULT},
116 	{ "active",		BOND_ARP_VALIDATE_ACTIVE,	0},
117 	{ "backup",		BOND_ARP_VALIDATE_BACKUP,	0},
118 	{ "all",		BOND_ARP_VALIDATE_ALL,		0},
119 	{ "filter",		BOND_ARP_FILTER,		0},
120 	{ "filter_active",	BOND_ARP_FILTER_ACTIVE,		0},
121 	{ "filter_backup",	BOND_ARP_FILTER_BACKUP,		0},
122 	{ NULL,			-1,				0},
123 };
124 
125 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
126 	{ "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
127 	{ "all", BOND_ARP_TARGETS_ALL, 0},
128 	{ NULL,  -1,                   0},
129 };
130 
131 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
132 	{ "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
133 	{ "active", BOND_FOM_ACTIVE, 0},
134 	{ "follow", BOND_FOM_FOLLOW, 0},
135 	{ NULL,     -1,              0},
136 };
137 
138 static const struct bond_opt_value bond_intmax_tbl[] = {
139 	{ "off",     0,       BOND_VALFLAG_DEFAULT},
140 	{ "maxval",  INT_MAX, BOND_VALFLAG_MAX},
141 	{ NULL,      -1,      0}
142 };
143 
144 static const struct bond_opt_value bond_lacp_active[] = {
145 	{ "off", 0,  0},
146 	{ "on",  1,  BOND_VALFLAG_DEFAULT},
147 	{ NULL,  -1, 0}
148 };
149 
150 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
151 	{ "slow", AD_LACP_SLOW, 0},
152 	{ "fast", AD_LACP_FAST, 0},
153 	{ NULL,   -1,           0},
154 };
155 
156 static const struct bond_opt_value bond_ad_select_tbl[] = {
157 	{ "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
158 	{ "bandwidth", BOND_AD_BANDWIDTH, 0},
159 	{ "count",     BOND_AD_COUNT,     0},
160 	{ NULL,        -1,                0},
161 };
162 
163 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
164 	{ "off",     0,   0},
165 	{ "maxval",  255, BOND_VALFLAG_MAX},
166 	{ "default", 1,   BOND_VALFLAG_DEFAULT},
167 	{ NULL,      -1,  0}
168 };
169 
170 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
171 	{ "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
172 	{ "better",  BOND_PRI_RESELECT_BETTER,  0},
173 	{ "failure", BOND_PRI_RESELECT_FAILURE, 0},
174 	{ NULL,      -1},
175 };
176 
177 static const struct bond_opt_value bond_use_carrier_tbl[] = {
178 	{ "off", 0,  0},
179 	{ "on",  1,  BOND_VALFLAG_DEFAULT},
180 	{ NULL,  -1, 0}
181 };
182 
183 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
184 	{ "off", 0,  BOND_VALFLAG_DEFAULT},
185 	{ "on",  1,  0},
186 	{ NULL,  -1, 0}
187 };
188 
189 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
190 	{ "off",     0,   0},
191 	{ "maxval",  255, BOND_VALFLAG_MAX},
192 	{ "default", 1,   BOND_VALFLAG_DEFAULT},
193 	{ NULL,      -1,  0}
194 };
195 
196 static const struct bond_opt_value bond_lp_interval_tbl[] = {
197 	{ "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
198 	{ "maxval",  INT_MAX, BOND_VALFLAG_MAX},
199 	{ NULL,      -1,      0},
200 };
201 
202 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
203 	{ "off", 0,  0},
204 	{ "on",  1,  BOND_VALFLAG_DEFAULT},
205 	{ NULL,  -1, 0}
206 };
207 
208 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
209 	{ "minval",  1,     BOND_VALFLAG_MIN},
210 	{ "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
211 	{ NULL,      -1,    0},
212 };
213 
214 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
215 	{ "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
216 	{ "maxval",  1023,  BOND_VALFLAG_MAX},
217 	{ NULL,      -1,    0},
218 };
219 
220 static const struct bond_opt_value bond_missed_max_tbl[] = {
221 	{ "minval",	1,	BOND_VALFLAG_MIN},
222 	{ "maxval",	255,	BOND_VALFLAG_MAX},
223 	{ "default",	2,	BOND_VALFLAG_DEFAULT},
224 	{ NULL,		-1,	0},
225 };
226 
227 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
228 	[BOND_OPT_MODE] = {
229 		.id = BOND_OPT_MODE,
230 		.name = "mode",
231 		.desc = "bond device mode",
232 		.flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
233 		.values = bond_mode_tbl,
234 		.set = bond_option_mode_set
235 	},
236 	[BOND_OPT_PACKETS_PER_SLAVE] = {
237 		.id = BOND_OPT_PACKETS_PER_SLAVE,
238 		.name = "packets_per_slave",
239 		.desc = "Packets to send per slave in RR mode",
240 		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
241 		.values = bond_pps_tbl,
242 		.set = bond_option_pps_set
243 	},
244 	[BOND_OPT_XMIT_HASH] = {
245 		.id = BOND_OPT_XMIT_HASH,
246 		.name = "xmit_hash_policy",
247 		.desc = "balance-xor, 802.3ad, and tlb hashing method",
248 		.values = bond_xmit_hashtype_tbl,
249 		.set = bond_option_xmit_hash_policy_set
250 	},
251 	[BOND_OPT_ARP_VALIDATE] = {
252 		.id = BOND_OPT_ARP_VALIDATE,
253 		.name = "arp_validate",
254 		.desc = "validate src/dst of ARP probes",
255 		.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
256 			       BIT(BOND_MODE_ALB),
257 		.values = bond_arp_validate_tbl,
258 		.set = bond_option_arp_validate_set
259 	},
260 	[BOND_OPT_ARP_ALL_TARGETS] = {
261 		.id = BOND_OPT_ARP_ALL_TARGETS,
262 		.name = "arp_all_targets",
263 		.desc = "fail on any/all arp targets timeout",
264 		.values = bond_arp_all_targets_tbl,
265 		.set = bond_option_arp_all_targets_set
266 	},
267 	[BOND_OPT_FAIL_OVER_MAC] = {
268 		.id = BOND_OPT_FAIL_OVER_MAC,
269 		.name = "fail_over_mac",
270 		.desc = "For active-backup, do not set all slaves to the same MAC",
271 		.flags = BOND_OPTFLAG_NOSLAVES,
272 		.values = bond_fail_over_mac_tbl,
273 		.set = bond_option_fail_over_mac_set
274 	},
275 	[BOND_OPT_ARP_INTERVAL] = {
276 		.id = BOND_OPT_ARP_INTERVAL,
277 		.name = "arp_interval",
278 		.desc = "arp interval in milliseconds",
279 		.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
280 			       BIT(BOND_MODE_ALB),
281 		.values = bond_intmax_tbl,
282 		.set = bond_option_arp_interval_set
283 	},
284 	[BOND_OPT_MISSED_MAX] = {
285 		.id = BOND_OPT_MISSED_MAX,
286 		.name = "arp_missed_max",
287 		.desc = "Maximum number of missed ARP interval",
288 		.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
289 			       BIT(BOND_MODE_ALB),
290 		.values = bond_missed_max_tbl,
291 		.set = bond_option_missed_max_set
292 	},
293 	[BOND_OPT_ARP_TARGETS] = {
294 		.id = BOND_OPT_ARP_TARGETS,
295 		.name = "arp_ip_target",
296 		.desc = "arp targets in n.n.n.n form",
297 		.flags = BOND_OPTFLAG_RAWVAL,
298 		.set = bond_option_arp_ip_targets_set
299 	},
300 	[BOND_OPT_NS_TARGETS] = {
301 		.id = BOND_OPT_NS_TARGETS,
302 		.name = "ns_ip6_target",
303 		.desc = "NS targets in ffff:ffff::ffff:ffff form",
304 		.flags = BOND_OPTFLAG_RAWVAL,
305 		.set = bond_option_ns_ip6_targets_set
306 	},
307 	[BOND_OPT_DOWNDELAY] = {
308 		.id = BOND_OPT_DOWNDELAY,
309 		.name = "downdelay",
310 		.desc = "Delay before considering link down, in milliseconds",
311 		.values = bond_intmax_tbl,
312 		.set = bond_option_downdelay_set
313 	},
314 	[BOND_OPT_UPDELAY] = {
315 		.id = BOND_OPT_UPDELAY,
316 		.name = "updelay",
317 		.desc = "Delay before considering link up, in milliseconds",
318 		.values = bond_intmax_tbl,
319 		.set = bond_option_updelay_set
320 	},
321 	[BOND_OPT_LACP_ACTIVE] = {
322 		.id = BOND_OPT_LACP_ACTIVE,
323 		.name = "lacp_active",
324 		.desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
325 		.flags = BOND_OPTFLAG_IFDOWN,
326 		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
327 		.values = bond_lacp_active,
328 		.set = bond_option_lacp_active_set
329 	},
330 	[BOND_OPT_LACP_RATE] = {
331 		.id = BOND_OPT_LACP_RATE,
332 		.name = "lacp_rate",
333 		.desc = "LACPDU tx rate to request from 802.3ad partner",
334 		.flags = BOND_OPTFLAG_IFDOWN,
335 		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
336 		.values = bond_lacp_rate_tbl,
337 		.set = bond_option_lacp_rate_set
338 	},
339 	[BOND_OPT_MINLINKS] = {
340 		.id = BOND_OPT_MINLINKS,
341 		.name = "min_links",
342 		.desc = "Minimum number of available links before turning on carrier",
343 		.values = bond_intmax_tbl,
344 		.set = bond_option_min_links_set
345 	},
346 	[BOND_OPT_AD_SELECT] = {
347 		.id = BOND_OPT_AD_SELECT,
348 		.name = "ad_select",
349 		.desc = "803.ad aggregation selection logic",
350 		.flags = BOND_OPTFLAG_IFDOWN,
351 		.values = bond_ad_select_tbl,
352 		.set = bond_option_ad_select_set
353 	},
354 	[BOND_OPT_NUM_PEER_NOTIF] = {
355 		.id = BOND_OPT_NUM_PEER_NOTIF,
356 		.name = "num_unsol_na",
357 		.desc = "Number of peer notifications to send on failover event",
358 		.values = bond_num_peer_notif_tbl,
359 		.set = bond_option_num_peer_notif_set
360 	},
361 	[BOND_OPT_MIIMON] = {
362 		.id = BOND_OPT_MIIMON,
363 		.name = "miimon",
364 		.desc = "Link check interval in milliseconds",
365 		.values = bond_intmax_tbl,
366 		.set = bond_option_miimon_set
367 	},
368 	[BOND_OPT_PRIMARY] = {
369 		.id = BOND_OPT_PRIMARY,
370 		.name = "primary",
371 		.desc = "Primary network device to use",
372 		.flags = BOND_OPTFLAG_RAWVAL,
373 		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
374 						BIT(BOND_MODE_TLB) |
375 						BIT(BOND_MODE_ALB)),
376 		.set = bond_option_primary_set
377 	},
378 	[BOND_OPT_PRIMARY_RESELECT] = {
379 		.id = BOND_OPT_PRIMARY_RESELECT,
380 		.name = "primary_reselect",
381 		.desc = "Reselect primary slave once it comes up",
382 		.values = bond_primary_reselect_tbl,
383 		.set = bond_option_primary_reselect_set
384 	},
385 	[BOND_OPT_USE_CARRIER] = {
386 		.id = BOND_OPT_USE_CARRIER,
387 		.name = "use_carrier",
388 		.desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
389 		.values = bond_use_carrier_tbl,
390 		.set = bond_option_use_carrier_set
391 	},
392 	[BOND_OPT_ACTIVE_SLAVE] = {
393 		.id = BOND_OPT_ACTIVE_SLAVE,
394 		.name = "active_slave",
395 		.desc = "Currently active slave",
396 		.flags = BOND_OPTFLAG_RAWVAL,
397 		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
398 						BIT(BOND_MODE_TLB) |
399 						BIT(BOND_MODE_ALB)),
400 		.set = bond_option_active_slave_set
401 	},
402 	[BOND_OPT_QUEUE_ID] = {
403 		.id = BOND_OPT_QUEUE_ID,
404 		.name = "queue_id",
405 		.desc = "Set queue id of a slave",
406 		.flags = BOND_OPTFLAG_RAWVAL,
407 		.set = bond_option_queue_id_set
408 	},
409 	[BOND_OPT_ALL_SLAVES_ACTIVE] = {
410 		.id = BOND_OPT_ALL_SLAVES_ACTIVE,
411 		.name = "all_slaves_active",
412 		.desc = "Keep all frames received on an interface by setting active flag for all slaves",
413 		.values = bond_all_slaves_active_tbl,
414 		.set = bond_option_all_slaves_active_set
415 	},
416 	[BOND_OPT_RESEND_IGMP] = {
417 		.id = BOND_OPT_RESEND_IGMP,
418 		.name = "resend_igmp",
419 		.desc = "Number of IGMP membership reports to send on link failure",
420 		.values = bond_resend_igmp_tbl,
421 		.set = bond_option_resend_igmp_set
422 	},
423 	[BOND_OPT_LP_INTERVAL] = {
424 		.id = BOND_OPT_LP_INTERVAL,
425 		.name = "lp_interval",
426 		.desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
427 		.values = bond_lp_interval_tbl,
428 		.set = bond_option_lp_interval_set
429 	},
430 	[BOND_OPT_SLAVES] = {
431 		.id = BOND_OPT_SLAVES,
432 		.name = "slaves",
433 		.desc = "Slave membership management",
434 		.flags = BOND_OPTFLAG_RAWVAL,
435 		.set = bond_option_slaves_set
436 	},
437 	[BOND_OPT_TLB_DYNAMIC_LB] = {
438 		.id = BOND_OPT_TLB_DYNAMIC_LB,
439 		.name = "tlb_dynamic_lb",
440 		.desc = "Enable dynamic flow shuffling",
441 		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
442 		.values = bond_tlb_dynamic_lb_tbl,
443 		.flags = BOND_OPTFLAG_IFDOWN,
444 		.set = bond_option_tlb_dynamic_lb_set,
445 	},
446 	[BOND_OPT_AD_ACTOR_SYS_PRIO] = {
447 		.id = BOND_OPT_AD_ACTOR_SYS_PRIO,
448 		.name = "ad_actor_sys_prio",
449 		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
450 		.values = bond_ad_actor_sys_prio_tbl,
451 		.set = bond_option_ad_actor_sys_prio_set,
452 	},
453 	[BOND_OPT_AD_ACTOR_SYSTEM] = {
454 		.id = BOND_OPT_AD_ACTOR_SYSTEM,
455 		.name = "ad_actor_system",
456 		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
457 		.flags = BOND_OPTFLAG_RAWVAL,
458 		.set = bond_option_ad_actor_system_set,
459 	},
460 	[BOND_OPT_AD_USER_PORT_KEY] = {
461 		.id = BOND_OPT_AD_USER_PORT_KEY,
462 		.name = "ad_user_port_key",
463 		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
464 		.flags = BOND_OPTFLAG_IFDOWN,
465 		.values = bond_ad_user_port_key_tbl,
466 		.set = bond_option_ad_user_port_key_set,
467 	},
468 	[BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
469 		.id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
470 		.name = "num_grat_arp",
471 		.desc = "Number of peer notifications to send on failover event",
472 		.values = bond_num_peer_notif_tbl,
473 		.set = bond_option_num_peer_notif_set
474 	},
475 	[BOND_OPT_PEER_NOTIF_DELAY] = {
476 		.id = BOND_OPT_PEER_NOTIF_DELAY,
477 		.name = "peer_notif_delay",
478 		.desc = "Delay between each peer notification on failover event, in milliseconds",
479 		.values = bond_intmax_tbl,
480 		.set = bond_option_peer_notif_delay_set
481 	}
482 };
483 
484 /* Searches for an option by name */
485 const struct bond_option *bond_opt_get_by_name(const char *name)
486 {
487 	const struct bond_option *opt;
488 	int option;
489 
490 	for (option = 0; option < BOND_OPT_LAST; option++) {
491 		opt = bond_opt_get(option);
492 		if (opt && !strcmp(opt->name, name))
493 			return opt;
494 	}
495 
496 	return NULL;
497 }
498 
499 /* Searches for a value in opt's values[] table */
500 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
501 {
502 	const struct bond_option *opt;
503 	int i;
504 
505 	opt = bond_opt_get(option);
506 	if (WARN_ON(!opt))
507 		return NULL;
508 	for (i = 0; opt->values && opt->values[i].string; i++)
509 		if (opt->values[i].value == val)
510 			return &opt->values[i];
511 
512 	return NULL;
513 }
514 
515 /* Searches for a value in opt's values[] table which matches the flagmask */
516 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
517 						       u32 flagmask)
518 {
519 	int i;
520 
521 	for (i = 0; opt->values && opt->values[i].string; i++)
522 		if (opt->values[i].flags & flagmask)
523 			return &opt->values[i];
524 
525 	return NULL;
526 }
527 
528 /* If maxval is missing then there's no range to check. In case minval is
529  * missing then it's considered to be 0.
530  */
531 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
532 {
533 	const struct bond_opt_value *minval, *maxval;
534 
535 	minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
536 	maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
537 	if (!maxval || (minval && val < minval->value) || val > maxval->value)
538 		return false;
539 
540 	return true;
541 }
542 
543 /**
544  * bond_opt_parse - parse option value
545  * @opt: the option to parse against
546  * @val: value to parse
547  *
548  * This function tries to extract the value from @val and check if it's
549  * a possible match for the option and returns NULL if a match isn't found,
550  * or the struct_opt_value that matched. It also strips the new line from
551  * @val->string if it's present.
552  */
553 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
554 					    struct bond_opt_value *val)
555 {
556 	char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
557 	const struct bond_opt_value *tbl;
558 	const struct bond_opt_value *ret = NULL;
559 	bool checkval;
560 	int i, rv;
561 
562 	/* No parsing if the option wants a raw val */
563 	if (opt->flags & BOND_OPTFLAG_RAWVAL)
564 		return val;
565 
566 	tbl = opt->values;
567 	if (!tbl)
568 		goto out;
569 
570 	/* ULLONG_MAX is used to bypass string processing */
571 	checkval = val->value != ULLONG_MAX;
572 	if (!checkval) {
573 		if (!val->string)
574 			goto out;
575 		p = strchr(val->string, '\n');
576 		if (p)
577 			*p = '\0';
578 		for (p = val->string; *p; p++)
579 			if (!(isdigit(*p) || isspace(*p)))
580 				break;
581 		/* The following code extracts the string to match or the value
582 		 * and sets checkval appropriately
583 		 */
584 		if (*p) {
585 			rv = sscanf(val->string, "%32s", valstr);
586 		} else {
587 			rv = sscanf(val->string, "%llu", &val->value);
588 			checkval = true;
589 		}
590 		if (!rv)
591 			goto out;
592 	}
593 
594 	for (i = 0; tbl[i].string; i++) {
595 		/* Check for exact match */
596 		if (checkval) {
597 			if (val->value == tbl[i].value)
598 				ret = &tbl[i];
599 		} else {
600 			if (!strcmp(valstr, "default") &&
601 			    (tbl[i].flags & BOND_VALFLAG_DEFAULT))
602 				ret = &tbl[i];
603 
604 			if (!strcmp(valstr, tbl[i].string))
605 				ret = &tbl[i];
606 		}
607 		/* Found an exact match */
608 		if (ret)
609 			goto out;
610 	}
611 	/* Possible range match */
612 	if (checkval && bond_opt_check_range(opt, val->value))
613 		ret = val;
614 out:
615 	return ret;
616 }
617 
618 /* Check opt's dependencies against bond mode and currently set options */
619 static int bond_opt_check_deps(struct bonding *bond,
620 			       const struct bond_option *opt)
621 {
622 	struct bond_params *params = &bond->params;
623 
624 	if (test_bit(params->mode, &opt->unsuppmodes))
625 		return -EACCES;
626 	if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
627 		return -ENOTEMPTY;
628 	if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
629 		return -EBUSY;
630 
631 	return 0;
632 }
633 
634 static void bond_opt_dep_print(struct bonding *bond,
635 			       const struct bond_option *opt)
636 {
637 	const struct bond_opt_value *modeval;
638 	struct bond_params *params;
639 
640 	params = &bond->params;
641 	modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
642 	if (test_bit(params->mode, &opt->unsuppmodes))
643 		netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
644 			   opt->name, modeval->string, modeval->value);
645 }
646 
647 static void bond_opt_error_interpret(struct bonding *bond,
648 				     const struct bond_option *opt,
649 				     int error, const struct bond_opt_value *val)
650 {
651 	const struct bond_opt_value *minval, *maxval;
652 	char *p;
653 
654 	switch (error) {
655 	case -EINVAL:
656 		if (val) {
657 			if (val->string) {
658 				/* sometimes RAWVAL opts may have new lines */
659 				p = strchr(val->string, '\n');
660 				if (p)
661 					*p = '\0';
662 				netdev_err(bond->dev, "option %s: invalid value (%s)\n",
663 					   opt->name, val->string);
664 			} else {
665 				netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
666 					   opt->name, val->value);
667 			}
668 		}
669 		minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
670 		maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
671 		if (!maxval)
672 			break;
673 		netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
674 			   opt->name, minval ? minval->value : 0, maxval->value);
675 		break;
676 	case -EACCES:
677 		bond_opt_dep_print(bond, opt);
678 		break;
679 	case -ENOTEMPTY:
680 		netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
681 			   opt->name);
682 		break;
683 	case -EBUSY:
684 		netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
685 			   opt->name);
686 		break;
687 	case -ENODEV:
688 		if (val && val->string) {
689 			p = strchr(val->string, '\n');
690 			if (p)
691 				*p = '\0';
692 			netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
693 				   opt->name, val->string);
694 		}
695 		break;
696 	default:
697 		break;
698 	}
699 }
700 
701 /**
702  * __bond_opt_set - set a bonding option
703  * @bond: target bond device
704  * @option: option to set
705  * @val: value to set it to
706  *
707  * This function is used to change the bond's option value, it can be
708  * used for both enabling/changing an option and for disabling it. RTNL lock
709  * must be obtained before calling this function.
710  */
711 int __bond_opt_set(struct bonding *bond,
712 		   unsigned int option, struct bond_opt_value *val)
713 {
714 	const struct bond_opt_value *retval = NULL;
715 	const struct bond_option *opt;
716 	int ret = -ENOENT;
717 
718 	ASSERT_RTNL();
719 
720 	opt = bond_opt_get(option);
721 	if (WARN_ON(!val) || WARN_ON(!opt))
722 		goto out;
723 	ret = bond_opt_check_deps(bond, opt);
724 	if (ret)
725 		goto out;
726 	retval = bond_opt_parse(opt, val);
727 	if (!retval) {
728 		ret = -EINVAL;
729 		goto out;
730 	}
731 	ret = opt->set(bond, retval);
732 out:
733 	if (ret)
734 		bond_opt_error_interpret(bond, opt, ret, val);
735 
736 	return ret;
737 }
738 /**
739  * __bond_opt_set_notify - set a bonding option
740  * @bond: target bond device
741  * @option: option to set
742  * @val: value to set it to
743  *
744  * This function is used to change the bond's option value and trigger
745  * a notification to user sapce. It can be used for both enabling/changing
746  * an option and for disabling it. RTNL lock must be obtained before calling
747  * this function.
748  */
749 int __bond_opt_set_notify(struct bonding *bond,
750 			  unsigned int option, struct bond_opt_value *val)
751 {
752 	int ret;
753 
754 	ASSERT_RTNL();
755 
756 	ret = __bond_opt_set(bond, option, val);
757 
758 	if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
759 		call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
760 
761 	return ret;
762 }
763 
764 /**
765  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
766  * @bond: target bond device
767  * @option: option to set
768  * @buf: value to set it to
769  *
770  * This function tries to acquire RTNL without blocking and if successful
771  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
772  */
773 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
774 {
775 	struct bond_opt_value optval;
776 	int ret;
777 
778 	if (!rtnl_trylock())
779 		return restart_syscall();
780 	bond_opt_initstr(&optval, buf);
781 	ret = __bond_opt_set_notify(bond, option, &optval);
782 	rtnl_unlock();
783 
784 	return ret;
785 }
786 
787 /**
788  * bond_opt_get - get a pointer to an option
789  * @option: option for which to return a pointer
790  *
791  * This function checks if option is valid and if so returns a pointer
792  * to its entry in the bond_opts[] option array.
793  */
794 const struct bond_option *bond_opt_get(unsigned int option)
795 {
796 	if (!BOND_OPT_VALID(option))
797 		return NULL;
798 
799 	return &bond_opts[option];
800 }
801 
802 static bool bond_set_xfrm_features(struct bonding *bond)
803 {
804 	if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
805 		return false;
806 
807 	if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
808 		bond->dev->wanted_features |= BOND_XFRM_FEATURES;
809 	else
810 		bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
811 
812 	return true;
813 }
814 
815 static bool bond_set_tls_features(struct bonding *bond)
816 {
817 	if (!IS_ENABLED(CONFIG_TLS_DEVICE))
818 		return false;
819 
820 	if (bond_sk_check(bond))
821 		bond->dev->wanted_features |= BOND_TLS_FEATURES;
822 	else
823 		bond->dev->wanted_features &= ~BOND_TLS_FEATURES;
824 
825 	return true;
826 }
827 
828 static int bond_option_mode_set(struct bonding *bond,
829 				const struct bond_opt_value *newval)
830 {
831 	if (!bond_mode_uses_arp(newval->value)) {
832 		if (bond->params.arp_interval) {
833 			netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
834 				   newval->string);
835 			/* disable arp monitoring */
836 			bond->params.arp_interval = 0;
837 		}
838 
839 		if (!bond->params.miimon) {
840 			/* set miimon to default value */
841 			bond->params.miimon = BOND_DEFAULT_MIIMON;
842 			netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
843 				   bond->params.miimon);
844 		}
845 	}
846 
847 	if (newval->value == BOND_MODE_ALB)
848 		bond->params.tlb_dynamic_lb = 1;
849 
850 	/* don't cache arp_validate between modes */
851 	bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
852 	bond->params.mode = newval->value;
853 
854 	if (bond->dev->reg_state == NETREG_REGISTERED) {
855 		bool update = false;
856 
857 		update |= bond_set_xfrm_features(bond);
858 		update |= bond_set_tls_features(bond);
859 
860 		if (update)
861 			netdev_update_features(bond->dev);
862 	}
863 
864 	return 0;
865 }
866 
867 static int bond_option_active_slave_set(struct bonding *bond,
868 					const struct bond_opt_value *newval)
869 {
870 	char ifname[IFNAMSIZ] = { 0, };
871 	struct net_device *slave_dev;
872 	int ret = 0;
873 
874 	sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
875 	if (!strlen(ifname) || newval->string[0] == '\n') {
876 		slave_dev = NULL;
877 	} else {
878 		slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
879 		if (!slave_dev)
880 			return -ENODEV;
881 	}
882 
883 	if (slave_dev) {
884 		if (!netif_is_bond_slave(slave_dev)) {
885 			slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
886 			return -EINVAL;
887 		}
888 
889 		if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
890 			slave_err(bond->dev, slave_dev, "Device is not our slave\n");
891 			return -EINVAL;
892 		}
893 	}
894 
895 	block_netpoll_tx();
896 	/* check to see if we are clearing active */
897 	if (!slave_dev) {
898 		netdev_dbg(bond->dev, "Clearing current active slave\n");
899 		RCU_INIT_POINTER(bond->curr_active_slave, NULL);
900 		bond_select_active_slave(bond);
901 	} else {
902 		struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
903 		struct slave *new_active = bond_slave_get_rtnl(slave_dev);
904 
905 		BUG_ON(!new_active);
906 
907 		if (new_active == old_active) {
908 			/* do nothing */
909 			slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
910 		} else {
911 			if (old_active && (new_active->link == BOND_LINK_UP) &&
912 			    bond_slave_is_up(new_active)) {
913 				slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
914 				bond_change_active_slave(bond, new_active);
915 			} else {
916 				slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
917 					  new_active->dev->name);
918 				ret = -EINVAL;
919 			}
920 		}
921 	}
922 	unblock_netpoll_tx();
923 
924 	return ret;
925 }
926 
927 /* There are two tricky bits here.  First, if MII monitoring is activated, then
928  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
929  * start it.
930  */
931 static int bond_option_miimon_set(struct bonding *bond,
932 				  const struct bond_opt_value *newval)
933 {
934 	netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
935 		   newval->value);
936 	bond->params.miimon = newval->value;
937 	if (bond->params.updelay)
938 		netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
939 			   bond->params.updelay * bond->params.miimon);
940 	if (bond->params.downdelay)
941 		netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
942 			   bond->params.downdelay * bond->params.miimon);
943 	if (bond->params.peer_notif_delay)
944 		netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
945 			   bond->params.peer_notif_delay * bond->params.miimon);
946 	if (newval->value && bond->params.arp_interval) {
947 		netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
948 		bond->params.arp_interval = 0;
949 		if (bond->params.arp_validate)
950 			bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
951 	}
952 	if (bond->dev->flags & IFF_UP) {
953 		/* If the interface is up, we may need to fire off
954 		 * the MII timer. If the interface is down, the
955 		 * timer will get fired off when the open function
956 		 * is called.
957 		 */
958 		if (!newval->value) {
959 			cancel_delayed_work_sync(&bond->mii_work);
960 		} else {
961 			cancel_delayed_work_sync(&bond->arp_work);
962 			queue_delayed_work(bond->wq, &bond->mii_work, 0);
963 		}
964 	}
965 
966 	return 0;
967 }
968 
969 /* Set up, down and peer notification delays. These must be multiples
970  * of the MII monitoring value, and are stored internally as the
971  * multiplier. Thus, we must translate to MS for the real world.
972  */
973 static int _bond_option_delay_set(struct bonding *bond,
974 				  const struct bond_opt_value *newval,
975 				  const char *name,
976 				  int *target)
977 {
978 	int value = newval->value;
979 
980 	if (!bond->params.miimon) {
981 		netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
982 			   name);
983 		return -EPERM;
984 	}
985 	if ((value % bond->params.miimon) != 0) {
986 		netdev_warn(bond->dev,
987 			    "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
988 			    name,
989 			    value, bond->params.miimon,
990 			    (value / bond->params.miimon) *
991 			    bond->params.miimon);
992 	}
993 	*target = value / bond->params.miimon;
994 	netdev_dbg(bond->dev, "Setting %s to %d\n",
995 		   name,
996 		   *target * bond->params.miimon);
997 
998 	return 0;
999 }
1000 
1001 static int bond_option_updelay_set(struct bonding *bond,
1002 				   const struct bond_opt_value *newval)
1003 {
1004 	return _bond_option_delay_set(bond, newval, "up delay",
1005 				      &bond->params.updelay);
1006 }
1007 
1008 static int bond_option_downdelay_set(struct bonding *bond,
1009 				     const struct bond_opt_value *newval)
1010 {
1011 	return _bond_option_delay_set(bond, newval, "down delay",
1012 				      &bond->params.downdelay);
1013 }
1014 
1015 static int bond_option_peer_notif_delay_set(struct bonding *bond,
1016 					    const struct bond_opt_value *newval)
1017 {
1018 	int ret = _bond_option_delay_set(bond, newval,
1019 					 "peer notification delay",
1020 					 &bond->params.peer_notif_delay);
1021 	return ret;
1022 }
1023 
1024 static int bond_option_use_carrier_set(struct bonding *bond,
1025 				       const struct bond_opt_value *newval)
1026 {
1027 	netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
1028 		   newval->value);
1029 	bond->params.use_carrier = newval->value;
1030 
1031 	return 0;
1032 }
1033 
1034 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
1035  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
1036  * we must start it.
1037  */
1038 static int bond_option_arp_interval_set(struct bonding *bond,
1039 					const struct bond_opt_value *newval)
1040 {
1041 	netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1042 		   newval->value);
1043 	bond->params.arp_interval = newval->value;
1044 	if (newval->value) {
1045 		if (bond->params.miimon) {
1046 			netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1047 			bond->params.miimon = 0;
1048 		}
1049 		if (!bond->params.arp_targets[0])
1050 			netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1051 	}
1052 	if (bond->dev->flags & IFF_UP) {
1053 		/* If the interface is up, we may need to fire off
1054 		 * the ARP timer.  If the interface is down, the
1055 		 * timer will get fired off when the open function
1056 		 * is called.
1057 		 */
1058 		if (!newval->value) {
1059 			if (bond->params.arp_validate)
1060 				bond->recv_probe = NULL;
1061 			cancel_delayed_work_sync(&bond->arp_work);
1062 		} else {
1063 			/* arp_validate can be set only in active-backup mode */
1064 			bond->recv_probe = bond_rcv_validate;
1065 			cancel_delayed_work_sync(&bond->mii_work);
1066 			queue_delayed_work(bond->wq, &bond->arp_work, 0);
1067 		}
1068 	}
1069 
1070 	return 0;
1071 }
1072 
1073 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1074 					    __be32 target,
1075 					    unsigned long last_rx)
1076 {
1077 	__be32 *targets = bond->params.arp_targets;
1078 	struct list_head *iter;
1079 	struct slave *slave;
1080 
1081 	if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1082 		bond_for_each_slave(bond, slave, iter)
1083 			slave->target_last_arp_rx[slot] = last_rx;
1084 		targets[slot] = target;
1085 	}
1086 }
1087 
1088 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1089 {
1090 	__be32 *targets = bond->params.arp_targets;
1091 	int ind;
1092 
1093 	if (!bond_is_ip_target_ok(target)) {
1094 		netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1095 			   &target);
1096 		return -EINVAL;
1097 	}
1098 
1099 	if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1100 		netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1101 			   &target);
1102 		return -EINVAL;
1103 	}
1104 
1105 	ind = bond_get_targets_ip(targets, 0); /* first free slot */
1106 	if (ind == -1) {
1107 		netdev_err(bond->dev, "ARP target table is full!\n");
1108 		return -EINVAL;
1109 	}
1110 
1111 	netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1112 
1113 	_bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1114 
1115 	return 0;
1116 }
1117 
1118 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1119 {
1120 	return _bond_option_arp_ip_target_add(bond, target);
1121 }
1122 
1123 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1124 {
1125 	__be32 *targets = bond->params.arp_targets;
1126 	struct list_head *iter;
1127 	struct slave *slave;
1128 	unsigned long *targets_rx;
1129 	int ind, i;
1130 
1131 	if (!bond_is_ip_target_ok(target)) {
1132 		netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1133 			   &target);
1134 		return -EINVAL;
1135 	}
1136 
1137 	ind = bond_get_targets_ip(targets, target);
1138 	if (ind == -1) {
1139 		netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1140 			   &target);
1141 		return -EINVAL;
1142 	}
1143 
1144 	if (ind == 0 && !targets[1] && bond->params.arp_interval)
1145 		netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1146 
1147 	netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1148 
1149 	bond_for_each_slave(bond, slave, iter) {
1150 		targets_rx = slave->target_last_arp_rx;
1151 		for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1152 			targets_rx[i] = targets_rx[i+1];
1153 		targets_rx[i] = 0;
1154 	}
1155 	for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1156 		targets[i] = targets[i+1];
1157 	targets[i] = 0;
1158 
1159 	return 0;
1160 }
1161 
1162 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1163 {
1164 	int i;
1165 
1166 	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1167 		_bond_options_arp_ip_target_set(bond, i, 0, 0);
1168 }
1169 
1170 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1171 					  const struct bond_opt_value *newval)
1172 {
1173 	int ret = -EPERM;
1174 	__be32 target;
1175 
1176 	if (newval->string) {
1177 		if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1178 			netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1179 				   &target);
1180 			return ret;
1181 		}
1182 		if (newval->string[0] == '+')
1183 			ret = bond_option_arp_ip_target_add(bond, target);
1184 		else if (newval->string[0] == '-')
1185 			ret = bond_option_arp_ip_target_rem(bond, target);
1186 		else
1187 			netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1188 	} else {
1189 		target = newval->value;
1190 		ret = bond_option_arp_ip_target_add(bond, target);
1191 	}
1192 
1193 	return ret;
1194 }
1195 
1196 #if IS_ENABLED(CONFIG_IPV6)
1197 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1198 					    struct in6_addr *target,
1199 					    unsigned long last_rx)
1200 {
1201 	struct in6_addr *targets = bond->params.ns_targets;
1202 	struct list_head *iter;
1203 	struct slave *slave;
1204 
1205 	if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1206 		bond_for_each_slave(bond, slave, iter)
1207 			slave->target_last_arp_rx[slot] = last_rx;
1208 		targets[slot] = *target;
1209 	}
1210 }
1211 
1212 void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1213 {
1214 	struct in6_addr addr_any = in6addr_any;
1215 	int i;
1216 
1217 	for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1218 		_bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1219 }
1220 
1221 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1222 					  const struct bond_opt_value *newval)
1223 {
1224 	struct in6_addr *target = (struct in6_addr *)newval->extra;
1225 	struct in6_addr *targets = bond->params.ns_targets;
1226 	struct in6_addr addr_any = in6addr_any;
1227 	int index;
1228 
1229 	if (!bond_is_ip6_target_ok(target)) {
1230 		netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1231 			   target);
1232 		return -EINVAL;
1233 	}
1234 
1235 	if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1236 		netdev_err(bond->dev, "NS target %pI6c is already present\n",
1237 			   target);
1238 		return -EINVAL;
1239 	}
1240 
1241 	index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1242 	if (index == -1) {
1243 		netdev_err(bond->dev, "NS target table is full!\n");
1244 		return -EINVAL;
1245 	}
1246 
1247 	netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1248 
1249 	_bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1250 
1251 	return 0;
1252 }
1253 #else
1254 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1255 					  const struct bond_opt_value *newval)
1256 {
1257 	return -EPERM;
1258 }
1259 #endif
1260 
1261 static int bond_option_arp_validate_set(struct bonding *bond,
1262 					const struct bond_opt_value *newval)
1263 {
1264 	netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1265 		   newval->string, newval->value);
1266 	bond->params.arp_validate = newval->value;
1267 
1268 	return 0;
1269 }
1270 
1271 static int bond_option_arp_all_targets_set(struct bonding *bond,
1272 					   const struct bond_opt_value *newval)
1273 {
1274 	netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1275 		   newval->string, newval->value);
1276 	bond->params.arp_all_targets = newval->value;
1277 
1278 	return 0;
1279 }
1280 
1281 static int bond_option_missed_max_set(struct bonding *bond,
1282 				      const struct bond_opt_value *newval)
1283 {
1284 	netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1285 		   newval->string, newval->value);
1286 	bond->params.missed_max = newval->value;
1287 
1288 	return 0;
1289 }
1290 
1291 static int bond_option_primary_set(struct bonding *bond,
1292 				   const struct bond_opt_value *newval)
1293 {
1294 	char *p, *primary = newval->string;
1295 	struct list_head *iter;
1296 	struct slave *slave;
1297 
1298 	block_netpoll_tx();
1299 
1300 	p = strchr(primary, '\n');
1301 	if (p)
1302 		*p = '\0';
1303 	/* check to see if we are clearing primary */
1304 	if (!strlen(primary)) {
1305 		netdev_dbg(bond->dev, "Setting primary slave to None\n");
1306 		RCU_INIT_POINTER(bond->primary_slave, NULL);
1307 		memset(bond->params.primary, 0, sizeof(bond->params.primary));
1308 		bond_select_active_slave(bond);
1309 		goto out;
1310 	}
1311 
1312 	bond_for_each_slave(bond, slave, iter) {
1313 		if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1314 			slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1315 			rcu_assign_pointer(bond->primary_slave, slave);
1316 			strcpy(bond->params.primary, slave->dev->name);
1317 			bond->force_primary = true;
1318 			bond_select_active_slave(bond);
1319 			goto out;
1320 		}
1321 	}
1322 
1323 	if (rtnl_dereference(bond->primary_slave)) {
1324 		netdev_dbg(bond->dev, "Setting primary slave to None\n");
1325 		RCU_INIT_POINTER(bond->primary_slave, NULL);
1326 		bond_select_active_slave(bond);
1327 	}
1328 	strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1329 
1330 	netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1331 		   primary);
1332 
1333 out:
1334 	unblock_netpoll_tx();
1335 
1336 	return 0;
1337 }
1338 
1339 static int bond_option_primary_reselect_set(struct bonding *bond,
1340 					    const struct bond_opt_value *newval)
1341 {
1342 	netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1343 		   newval->string, newval->value);
1344 	bond->params.primary_reselect = newval->value;
1345 
1346 	block_netpoll_tx();
1347 	bond_select_active_slave(bond);
1348 	unblock_netpoll_tx();
1349 
1350 	return 0;
1351 }
1352 
1353 static int bond_option_fail_over_mac_set(struct bonding *bond,
1354 					 const struct bond_opt_value *newval)
1355 {
1356 	netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1357 		   newval->string, newval->value);
1358 	bond->params.fail_over_mac = newval->value;
1359 
1360 	return 0;
1361 }
1362 
1363 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1364 					    const struct bond_opt_value *newval)
1365 {
1366 	netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1367 		   newval->string, newval->value);
1368 	bond->params.xmit_policy = newval->value;
1369 
1370 	if (bond->dev->reg_state == NETREG_REGISTERED)
1371 		if (bond_set_tls_features(bond))
1372 			netdev_update_features(bond->dev);
1373 
1374 	return 0;
1375 }
1376 
1377 static int bond_option_resend_igmp_set(struct bonding *bond,
1378 				       const struct bond_opt_value *newval)
1379 {
1380 	netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1381 		   newval->value);
1382 	bond->params.resend_igmp = newval->value;
1383 
1384 	return 0;
1385 }
1386 
1387 static int bond_option_num_peer_notif_set(struct bonding *bond,
1388 				   const struct bond_opt_value *newval)
1389 {
1390 	bond->params.num_peer_notif = newval->value;
1391 
1392 	return 0;
1393 }
1394 
1395 static int bond_option_all_slaves_active_set(struct bonding *bond,
1396 					     const struct bond_opt_value *newval)
1397 {
1398 	struct list_head *iter;
1399 	struct slave *slave;
1400 
1401 	if (newval->value == bond->params.all_slaves_active)
1402 		return 0;
1403 	bond->params.all_slaves_active = newval->value;
1404 	bond_for_each_slave(bond, slave, iter) {
1405 		if (!bond_is_active_slave(slave)) {
1406 			if (newval->value)
1407 				slave->inactive = 0;
1408 			else
1409 				slave->inactive = 1;
1410 		}
1411 	}
1412 
1413 	return 0;
1414 }
1415 
1416 static int bond_option_min_links_set(struct bonding *bond,
1417 				     const struct bond_opt_value *newval)
1418 {
1419 	netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1420 		   newval->value);
1421 	bond->params.min_links = newval->value;
1422 	bond_set_carrier(bond);
1423 
1424 	return 0;
1425 }
1426 
1427 static int bond_option_lp_interval_set(struct bonding *bond,
1428 				       const struct bond_opt_value *newval)
1429 {
1430 	bond->params.lp_interval = newval->value;
1431 
1432 	return 0;
1433 }
1434 
1435 static int bond_option_pps_set(struct bonding *bond,
1436 			       const struct bond_opt_value *newval)
1437 {
1438 	netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1439 		   newval->value);
1440 	bond->params.packets_per_slave = newval->value;
1441 	if (newval->value > 0) {
1442 		bond->params.reciprocal_packets_per_slave =
1443 			reciprocal_value(newval->value);
1444 	} else {
1445 		/* reciprocal_packets_per_slave is unused if
1446 		 * packets_per_slave is 0 or 1, just initialize it
1447 		 */
1448 		bond->params.reciprocal_packets_per_slave =
1449 			(struct reciprocal_value) { 0 };
1450 	}
1451 
1452 	return 0;
1453 }
1454 
1455 static int bond_option_lacp_active_set(struct bonding *bond,
1456 				       const struct bond_opt_value *newval)
1457 {
1458 	netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1459 		   newval->string, newval->value);
1460 	bond->params.lacp_active = newval->value;
1461 
1462 	return 0;
1463 }
1464 
1465 static int bond_option_lacp_rate_set(struct bonding *bond,
1466 				     const struct bond_opt_value *newval)
1467 {
1468 	netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1469 		   newval->string, newval->value);
1470 	bond->params.lacp_fast = newval->value;
1471 	bond_3ad_update_lacp_rate(bond);
1472 
1473 	return 0;
1474 }
1475 
1476 static int bond_option_ad_select_set(struct bonding *bond,
1477 				     const struct bond_opt_value *newval)
1478 {
1479 	netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1480 		   newval->string, newval->value);
1481 	bond->params.ad_select = newval->value;
1482 
1483 	return 0;
1484 }
1485 
1486 static int bond_option_queue_id_set(struct bonding *bond,
1487 				    const struct bond_opt_value *newval)
1488 {
1489 	struct slave *slave, *update_slave;
1490 	struct net_device *sdev;
1491 	struct list_head *iter;
1492 	char *delim;
1493 	int ret = 0;
1494 	u16 qid;
1495 
1496 	/* delim will point to queue id if successful */
1497 	delim = strchr(newval->string, ':');
1498 	if (!delim)
1499 		goto err_no_cmd;
1500 
1501 	/* Terminate string that points to device name and bump it
1502 	 * up one, so we can read the queue id there.
1503 	 */
1504 	*delim = '\0';
1505 	if (sscanf(++delim, "%hd\n", &qid) != 1)
1506 		goto err_no_cmd;
1507 
1508 	/* Check buffer length, valid ifname and queue id */
1509 	if (!dev_valid_name(newval->string) ||
1510 	    qid > bond->dev->real_num_tx_queues)
1511 		goto err_no_cmd;
1512 
1513 	/* Get the pointer to that interface if it exists */
1514 	sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1515 	if (!sdev)
1516 		goto err_no_cmd;
1517 
1518 	/* Search for thes slave and check for duplicate qids */
1519 	update_slave = NULL;
1520 	bond_for_each_slave(bond, slave, iter) {
1521 		if (sdev == slave->dev)
1522 			/* We don't need to check the matching
1523 			 * slave for dups, since we're overwriting it
1524 			 */
1525 			update_slave = slave;
1526 		else if (qid && qid == slave->queue_id) {
1527 			goto err_no_cmd;
1528 		}
1529 	}
1530 
1531 	if (!update_slave)
1532 		goto err_no_cmd;
1533 
1534 	/* Actually set the qids for the slave */
1535 	update_slave->queue_id = qid;
1536 
1537 out:
1538 	return ret;
1539 
1540 err_no_cmd:
1541 	netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1542 	ret = -EPERM;
1543 	goto out;
1544 
1545 }
1546 
1547 static int bond_option_slaves_set(struct bonding *bond,
1548 				  const struct bond_opt_value *newval)
1549 {
1550 	char command[IFNAMSIZ + 1] = { 0, };
1551 	struct net_device *dev;
1552 	char *ifname;
1553 	int ret;
1554 
1555 	sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1556 	ifname = command + 1;
1557 	if ((strlen(command) <= 1) ||
1558 	    (command[0] != '+' && command[0] != '-') ||
1559 	    !dev_valid_name(ifname))
1560 		goto err_no_cmd;
1561 
1562 	dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1563 	if (!dev) {
1564 		netdev_dbg(bond->dev, "interface %s does not exist!\n",
1565 			   ifname);
1566 		ret = -ENODEV;
1567 		goto out;
1568 	}
1569 
1570 	switch (command[0]) {
1571 	case '+':
1572 		slave_dbg(bond->dev, dev, "Enslaving interface\n");
1573 		ret = bond_enslave(bond->dev, dev, NULL);
1574 		break;
1575 
1576 	case '-':
1577 		slave_dbg(bond->dev, dev, "Releasing interface\n");
1578 		ret = bond_release(bond->dev, dev);
1579 		break;
1580 
1581 	default:
1582 		/* should not run here. */
1583 		goto err_no_cmd;
1584 	}
1585 
1586 out:
1587 	return ret;
1588 
1589 err_no_cmd:
1590 	netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1591 	ret = -EPERM;
1592 	goto out;
1593 }
1594 
1595 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1596 					  const struct bond_opt_value *newval)
1597 {
1598 	netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1599 		   newval->string, newval->value);
1600 	bond->params.tlb_dynamic_lb = newval->value;
1601 
1602 	return 0;
1603 }
1604 
1605 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1606 					     const struct bond_opt_value *newval)
1607 {
1608 	netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1609 		   newval->value);
1610 
1611 	bond->params.ad_actor_sys_prio = newval->value;
1612 	bond_3ad_update_ad_actor_settings(bond);
1613 
1614 	return 0;
1615 }
1616 
1617 static int bond_option_ad_actor_system_set(struct bonding *bond,
1618 					   const struct bond_opt_value *newval)
1619 {
1620 	u8 macaddr[ETH_ALEN];
1621 	u8 *mac;
1622 
1623 	if (newval->string) {
1624 		if (!mac_pton(newval->string, macaddr))
1625 			goto err;
1626 		mac = macaddr;
1627 	} else {
1628 		mac = (u8 *)&newval->value;
1629 	}
1630 
1631 	if (is_multicast_ether_addr(mac))
1632 		goto err;
1633 
1634 	netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1635 	ether_addr_copy(bond->params.ad_actor_system, mac);
1636 	bond_3ad_update_ad_actor_settings(bond);
1637 
1638 	return 0;
1639 
1640 err:
1641 	netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1642 	return -EINVAL;
1643 }
1644 
1645 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1646 					    const struct bond_opt_value *newval)
1647 {
1648 	netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1649 		   newval->value);
1650 
1651 	bond->params.ad_user_port_key = newval->value;
1652 	return 0;
1653 }
1654