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