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>
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.
12 #include <linux/errno.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>
21 static int bond_option_active_slave_set(struct bonding *bond,
22 const struct bond_opt_value *newval);
23 static int bond_option_miimon_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25 static int bond_option_updelay_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27 static int bond_option_downdelay_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_arp_validate_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39 static int bond_option_arp_all_targets_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41 static int bond_option_primary_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43 static int bond_option_primary_reselect_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45 static int bond_option_fail_over_mac_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49 static int bond_option_resend_igmp_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51 static int bond_option_num_peer_notif_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53 static int bond_option_all_slaves_active_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55 static int bond_option_min_links_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57 static int bond_option_lp_interval_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59 static int bond_option_pps_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61 static int bond_option_lacp_rate_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63 static int bond_option_ad_select_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65 static int bond_option_queue_id_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67 static int bond_option_mode_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69 static int bond_option_slaves_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
75 static const struct bond_opt_value bond_mode_tbl[] = {
76 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
77 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
78 { "balance-xor", BOND_MODE_XOR, 0},
79 { "broadcast", BOND_MODE_BROADCAST, 0},
80 { "802.3ad", BOND_MODE_8023AD, 0},
81 { "balance-tlb", BOND_MODE_TLB, 0},
82 { "balance-alb", BOND_MODE_ALB, 0},
86 static const struct bond_opt_value bond_pps_tbl[] = {
87 { "default", 1, BOND_VALFLAG_DEFAULT},
88 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
92 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
93 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
94 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
95 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
96 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
97 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
101 static const struct bond_opt_value bond_arp_validate_tbl[] = {
102 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
103 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
104 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
105 { "all", BOND_ARP_VALIDATE_ALL, 0},
106 { "filter", BOND_ARP_FILTER, 0},
107 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
108 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
112 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
113 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
114 { "all", BOND_ARP_TARGETS_ALL, 0},
118 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
119 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
120 { "active", BOND_FOM_ACTIVE, 0},
121 { "follow", BOND_FOM_FOLLOW, 0},
125 static const struct bond_opt_value bond_intmax_tbl[] = {
126 { "off", 0, BOND_VALFLAG_DEFAULT},
127 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
131 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
132 { "slow", AD_LACP_SLOW, 0},
133 { "fast", AD_LACP_FAST, 0},
137 static const struct bond_opt_value bond_ad_select_tbl[] = {
138 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
139 { "bandwidth", BOND_AD_BANDWIDTH, 0},
140 { "count", BOND_AD_COUNT, 0},
144 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
146 { "maxval", 255, BOND_VALFLAG_MAX},
147 { "default", 1, BOND_VALFLAG_DEFAULT},
151 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
152 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
153 { "better", BOND_PRI_RESELECT_BETTER, 0},
154 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
158 static const struct bond_opt_value bond_use_carrier_tbl[] = {
160 { "on", 1, BOND_VALFLAG_DEFAULT},
164 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
165 { "off", 0, BOND_VALFLAG_DEFAULT},
170 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
172 { "maxval", 255, BOND_VALFLAG_MAX},
173 { "default", 1, BOND_VALFLAG_DEFAULT},
177 static const struct bond_opt_value bond_lp_interval_tbl[] = {
178 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
179 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
183 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
185 { "on", 1, BOND_VALFLAG_DEFAULT},
189 static const struct bond_option bond_opts[] = {
193 .desc = "bond device mode",
194 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
195 .values = bond_mode_tbl,
196 .set = bond_option_mode_set
198 [BOND_OPT_PACKETS_PER_SLAVE] = {
199 .id = BOND_OPT_PACKETS_PER_SLAVE,
200 .name = "packets_per_slave",
201 .desc = "Packets to send per slave in RR mode",
202 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
203 .values = bond_pps_tbl,
204 .set = bond_option_pps_set
206 [BOND_OPT_XMIT_HASH] = {
207 .id = BOND_OPT_XMIT_HASH,
208 .name = "xmit_hash_policy",
209 .desc = "balance-xor, 802.3ad, and tlb hashing method",
210 .values = bond_xmit_hashtype_tbl,
211 .set = bond_option_xmit_hash_policy_set
213 [BOND_OPT_ARP_VALIDATE] = {
214 .id = BOND_OPT_ARP_VALIDATE,
215 .name = "arp_validate",
216 .desc = "validate src/dst of ARP probes",
217 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
219 .values = bond_arp_validate_tbl,
220 .set = bond_option_arp_validate_set
222 [BOND_OPT_ARP_ALL_TARGETS] = {
223 .id = BOND_OPT_ARP_ALL_TARGETS,
224 .name = "arp_all_targets",
225 .desc = "fail on any/all arp targets timeout",
226 .values = bond_arp_all_targets_tbl,
227 .set = bond_option_arp_all_targets_set
229 [BOND_OPT_FAIL_OVER_MAC] = {
230 .id = BOND_OPT_FAIL_OVER_MAC,
231 .name = "fail_over_mac",
232 .desc = "For active-backup, do not set all slaves to the same MAC",
233 .flags = BOND_OPTFLAG_NOSLAVES,
234 .values = bond_fail_over_mac_tbl,
235 .set = bond_option_fail_over_mac_set
237 [BOND_OPT_ARP_INTERVAL] = {
238 .id = BOND_OPT_ARP_INTERVAL,
239 .name = "arp_interval",
240 .desc = "arp interval in milliseconds",
241 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
243 .values = bond_intmax_tbl,
244 .set = bond_option_arp_interval_set
246 [BOND_OPT_ARP_TARGETS] = {
247 .id = BOND_OPT_ARP_TARGETS,
248 .name = "arp_ip_target",
249 .desc = "arp targets in n.n.n.n form",
250 .flags = BOND_OPTFLAG_RAWVAL,
251 .set = bond_option_arp_ip_targets_set
253 [BOND_OPT_DOWNDELAY] = {
254 .id = BOND_OPT_DOWNDELAY,
256 .desc = "Delay before considering link down, in milliseconds",
257 .values = bond_intmax_tbl,
258 .set = bond_option_downdelay_set
260 [BOND_OPT_UPDELAY] = {
261 .id = BOND_OPT_UPDELAY,
263 .desc = "Delay before considering link up, in milliseconds",
264 .values = bond_intmax_tbl,
265 .set = bond_option_updelay_set
267 [BOND_OPT_LACP_RATE] = {
268 .id = BOND_OPT_LACP_RATE,
270 .desc = "LACPDU tx rate to request from 802.3ad partner",
271 .flags = BOND_OPTFLAG_IFDOWN,
272 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
273 .values = bond_lacp_rate_tbl,
274 .set = bond_option_lacp_rate_set
276 [BOND_OPT_MINLINKS] = {
277 .id = BOND_OPT_MINLINKS,
279 .desc = "Minimum number of available links before turning on carrier",
280 .values = bond_intmax_tbl,
281 .set = bond_option_min_links_set
283 [BOND_OPT_AD_SELECT] = {
284 .id = BOND_OPT_AD_SELECT,
286 .desc = "803.ad aggregation selection logic",
287 .flags = BOND_OPTFLAG_IFDOWN,
288 .values = bond_ad_select_tbl,
289 .set = bond_option_ad_select_set
291 [BOND_OPT_NUM_PEER_NOTIF] = {
292 .id = BOND_OPT_NUM_PEER_NOTIF,
293 .name = "num_unsol_na",
294 .desc = "Number of peer notifications to send on failover event",
295 .values = bond_num_peer_notif_tbl,
296 .set = bond_option_num_peer_notif_set
298 [BOND_OPT_MIIMON] = {
299 .id = BOND_OPT_MIIMON,
301 .desc = "Link check interval in milliseconds",
302 .values = bond_intmax_tbl,
303 .set = bond_option_miimon_set
305 [BOND_OPT_PRIMARY] = {
306 .id = BOND_OPT_PRIMARY,
308 .desc = "Primary network device to use",
309 .flags = BOND_OPTFLAG_RAWVAL,
310 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
313 .set = bond_option_primary_set
315 [BOND_OPT_PRIMARY_RESELECT] = {
316 .id = BOND_OPT_PRIMARY_RESELECT,
317 .name = "primary_reselect",
318 .desc = "Reselect primary slave once it comes up",
319 .values = bond_primary_reselect_tbl,
320 .set = bond_option_primary_reselect_set
322 [BOND_OPT_USE_CARRIER] = {
323 .id = BOND_OPT_USE_CARRIER,
324 .name = "use_carrier",
325 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
326 .values = bond_use_carrier_tbl,
327 .set = bond_option_use_carrier_set
329 [BOND_OPT_ACTIVE_SLAVE] = {
330 .id = BOND_OPT_ACTIVE_SLAVE,
331 .name = "active_slave",
332 .desc = "Currently active slave",
333 .flags = BOND_OPTFLAG_RAWVAL,
334 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
337 .set = bond_option_active_slave_set
339 [BOND_OPT_QUEUE_ID] = {
340 .id = BOND_OPT_QUEUE_ID,
342 .desc = "Set queue id of a slave",
343 .flags = BOND_OPTFLAG_RAWVAL,
344 .set = bond_option_queue_id_set
346 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
347 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
348 .name = "all_slaves_active",
349 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
350 .values = bond_all_slaves_active_tbl,
351 .set = bond_option_all_slaves_active_set
353 [BOND_OPT_RESEND_IGMP] = {
354 .id = BOND_OPT_RESEND_IGMP,
355 .name = "resend_igmp",
356 .desc = "Number of IGMP membership reports to send on link failure",
357 .values = bond_resend_igmp_tbl,
358 .set = bond_option_resend_igmp_set
360 [BOND_OPT_LP_INTERVAL] = {
361 .id = BOND_OPT_LP_INTERVAL,
362 .name = "lp_interval",
363 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
364 .values = bond_lp_interval_tbl,
365 .set = bond_option_lp_interval_set
367 [BOND_OPT_SLAVES] = {
368 .id = BOND_OPT_SLAVES,
370 .desc = "Slave membership management",
371 .flags = BOND_OPTFLAG_RAWVAL,
372 .set = bond_option_slaves_set
374 [BOND_OPT_TLB_DYNAMIC_LB] = {
375 .id = BOND_OPT_TLB_DYNAMIC_LB,
376 .name = "tlb_dynamic_lb",
377 .desc = "Enable dynamic flow shuffling",
378 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
379 .values = bond_tlb_dynamic_lb_tbl,
380 .flags = BOND_OPTFLAG_IFDOWN,
381 .set = bond_option_tlb_dynamic_lb_set,
386 /* Searches for an option by name */
387 const struct bond_option *bond_opt_get_by_name(const char *name)
389 const struct bond_option *opt;
392 for (option = 0; option < BOND_OPT_LAST; option++) {
393 opt = bond_opt_get(option);
394 if (opt && !strcmp(opt->name, name))
401 /* Searches for a value in opt's values[] table */
402 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
404 const struct bond_option *opt;
407 opt = bond_opt_get(option);
410 for (i = 0; opt->values && opt->values[i].string; i++)
411 if (opt->values[i].value == val)
412 return &opt->values[i];
417 /* Searches for a value in opt's values[] table which matches the flagmask */
418 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
423 for (i = 0; opt->values && opt->values[i].string; i++)
424 if (opt->values[i].flags & flagmask)
425 return &opt->values[i];
430 /* If maxval is missing then there's no range to check. In case minval is
431 * missing then it's considered to be 0.
433 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
435 const struct bond_opt_value *minval, *maxval;
437 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
438 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
439 if (!maxval || (minval && val < minval->value) || val > maxval->value)
446 * bond_opt_parse - parse option value
447 * @opt: the option to parse against
448 * @val: value to parse
450 * This function tries to extract the value from @val and check if it's
451 * a possible match for the option and returns NULL if a match isn't found,
452 * or the struct_opt_value that matched. It also strips the new line from
453 * @val->string if it's present.
455 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
456 struct bond_opt_value *val)
458 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
459 const struct bond_opt_value *tbl;
460 const struct bond_opt_value *ret = NULL;
464 /* No parsing if the option wants a raw val */
465 if (opt->flags & BOND_OPTFLAG_RAWVAL)
472 /* ULLONG_MAX is used to bypass string processing */
473 checkval = val->value != ULLONG_MAX;
477 p = strchr(val->string, '\n');
480 for (p = val->string; *p; p++)
481 if (!(isdigit(*p) || isspace(*p)))
483 /* The following code extracts the string to match or the value
484 * and sets checkval appropriately
487 rv = sscanf(val->string, "%32s", valstr);
489 rv = sscanf(val->string, "%llu", &val->value);
496 for (i = 0; tbl[i].string; i++) {
497 /* Check for exact match */
499 if (val->value == tbl[i].value)
502 if (!strcmp(valstr, "default") &&
503 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
506 if (!strcmp(valstr, tbl[i].string))
509 /* Found an exact match */
513 /* Possible range match */
514 if (checkval && bond_opt_check_range(opt, val->value))
520 /* Check opt's dependencies against bond mode and currently set options */
521 static int bond_opt_check_deps(struct bonding *bond,
522 const struct bond_option *opt)
524 struct bond_params *params = &bond->params;
526 if (test_bit(params->mode, &opt->unsuppmodes))
528 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
530 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
536 static void bond_opt_dep_print(struct bonding *bond,
537 const struct bond_option *opt)
539 const struct bond_opt_value *modeval;
540 struct bond_params *params;
542 params = &bond->params;
543 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
544 if (test_bit(params->mode, &opt->unsuppmodes))
545 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
546 opt->name, modeval->string, modeval->value);
549 static void bond_opt_error_interpret(struct bonding *bond,
550 const struct bond_option *opt,
551 int error, const struct bond_opt_value *val)
553 const struct bond_opt_value *minval, *maxval;
560 /* sometimes RAWVAL opts may have new lines */
561 p = strchr(val->string, '\n');
564 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
565 opt->name, val->string);
567 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
568 opt->name, val->value);
571 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
572 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
575 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
576 opt->name, minval ? minval->value : 0, maxval->value);
579 bond_opt_dep_print(bond, opt);
582 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
586 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
595 * __bond_opt_set - set a bonding option
596 * @bond: target bond device
597 * @option: option to set
598 * @val: value to set it to
600 * This function is used to change the bond's option value, it can be
601 * used for both enabling/changing an option and for disabling it. RTNL lock
602 * must be obtained before calling this function.
604 int __bond_opt_set(struct bonding *bond,
605 unsigned int option, struct bond_opt_value *val)
607 const struct bond_opt_value *retval = NULL;
608 const struct bond_option *opt;
613 opt = bond_opt_get(option);
614 if (WARN_ON(!val) || WARN_ON(!opt))
616 ret = bond_opt_check_deps(bond, opt);
619 retval = bond_opt_parse(opt, val);
624 ret = opt->set(bond, retval);
627 bond_opt_error_interpret(bond, opt, ret, val);
633 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
634 * @bond: target bond device
635 * @option: option to set
636 * @buf: value to set it to
638 * This function tries to acquire RTNL without blocking and if successful
639 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
641 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
643 struct bond_opt_value optval;
647 return restart_syscall();
648 bond_opt_initstr(&optval, buf);
649 ret = __bond_opt_set(bond, option, &optval);
656 * bond_opt_get - get a pointer to an option
657 * @option: option for which to return a pointer
659 * This function checks if option is valid and if so returns a pointer
660 * to its entry in the bond_opts[] option array.
662 const struct bond_option *bond_opt_get(unsigned int option)
664 if (!BOND_OPT_VALID(option))
667 return &bond_opts[option];
670 static int bond_option_mode_set(struct bonding *bond,
671 const struct bond_opt_value *newval)
673 if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
674 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
676 /* disable arp monitoring */
677 bond->params.arp_interval = 0;
678 /* set miimon to default value */
679 bond->params.miimon = BOND_DEFAULT_MIIMON;
680 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
681 bond->params.miimon);
684 /* don't cache arp_validate between modes */
685 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
686 bond->params.mode = newval->value;
691 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
694 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
697 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
699 struct slave *slave = rcu_dereference(bond->curr_active_slave);
701 return __bond_option_active_slave_get(bond, slave);
704 static int bond_option_active_slave_set(struct bonding *bond,
705 const struct bond_opt_value *newval)
707 char ifname[IFNAMSIZ] = { 0, };
708 struct net_device *slave_dev;
711 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
712 if (!strlen(ifname) || newval->string[0] == '\n') {
715 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
721 if (!netif_is_bond_slave(slave_dev)) {
722 netdev_err(bond->dev, "Device %s is not bonding slave\n",
727 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
728 netdev_err(bond->dev, "Device %s is not our slave\n",
735 write_lock_bh(&bond->curr_slave_lock);
737 /* check to see if we are clearing active */
739 netdev_info(bond->dev, "Clearing current active slave\n");
740 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
741 bond_select_active_slave(bond);
743 struct slave *old_active = bond_deref_active_protected(bond);
744 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
748 if (new_active == old_active) {
750 netdev_info(bond->dev, "%s is already the current active slave\n",
751 new_active->dev->name);
753 if (old_active && (new_active->link == BOND_LINK_UP) &&
754 bond_slave_is_up(new_active)) {
755 netdev_info(bond->dev, "Setting %s as active slave\n",
756 new_active->dev->name);
757 bond_change_active_slave(bond, new_active);
759 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
760 new_active->dev->name,
761 new_active->dev->name);
767 write_unlock_bh(&bond->curr_slave_lock);
768 unblock_netpoll_tx();
773 /* There are two tricky bits here. First, if MII monitoring is activated, then
774 * we must disable ARP monitoring. Second, if the timer isn't running, we must
777 static int bond_option_miimon_set(struct bonding *bond,
778 const struct bond_opt_value *newval)
780 netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
782 bond->params.miimon = newval->value;
783 if (bond->params.updelay)
784 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
785 bond->params.updelay * bond->params.miimon);
786 if (bond->params.downdelay)
787 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
788 bond->params.downdelay * bond->params.miimon);
789 if (newval->value && bond->params.arp_interval) {
790 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
791 bond->params.arp_interval = 0;
792 if (bond->params.arp_validate)
793 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
795 if (bond->dev->flags & IFF_UP) {
796 /* If the interface is up, we may need to fire off
797 * the MII timer. If the interface is down, the
798 * timer will get fired off when the open function
801 if (!newval->value) {
802 cancel_delayed_work_sync(&bond->mii_work);
804 cancel_delayed_work_sync(&bond->arp_work);
805 queue_delayed_work(bond->wq, &bond->mii_work, 0);
812 /* Set up and down delays. These must be multiples of the
813 * MII monitoring value, and are stored internally as the multiplier.
814 * Thus, we must translate to MS for the real world.
816 static int bond_option_updelay_set(struct bonding *bond,
817 const struct bond_opt_value *newval)
819 int value = newval->value;
821 if (!bond->params.miimon) {
822 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
825 if ((value % bond->params.miimon) != 0) {
826 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
827 value, bond->params.miimon,
828 (value / bond->params.miimon) *
829 bond->params.miimon);
831 bond->params.updelay = value / bond->params.miimon;
832 netdev_info(bond->dev, "Setting up delay to %d\n",
833 bond->params.updelay * bond->params.miimon);
838 static int bond_option_downdelay_set(struct bonding *bond,
839 const struct bond_opt_value *newval)
841 int value = newval->value;
843 if (!bond->params.miimon) {
844 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
847 if ((value % bond->params.miimon) != 0) {
848 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
849 value, bond->params.miimon,
850 (value / bond->params.miimon) *
851 bond->params.miimon);
853 bond->params.downdelay = value / bond->params.miimon;
854 netdev_info(bond->dev, "Setting down delay to %d\n",
855 bond->params.downdelay * bond->params.miimon);
860 static int bond_option_use_carrier_set(struct bonding *bond,
861 const struct bond_opt_value *newval)
863 netdev_info(bond->dev, "Setting use_carrier to %llu\n",
865 bond->params.use_carrier = newval->value;
870 /* There are two tricky bits here. First, if ARP monitoring is activated, then
871 * we must disable MII monitoring. Second, if the ARP timer isn't running,
874 static int bond_option_arp_interval_set(struct bonding *bond,
875 const struct bond_opt_value *newval)
877 netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
879 bond->params.arp_interval = newval->value;
881 if (bond->params.miimon) {
882 netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
883 bond->params.miimon = 0;
885 if (!bond->params.arp_targets[0])
886 netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
888 if (bond->dev->flags & IFF_UP) {
889 /* If the interface is up, we may need to fire off
890 * the ARP timer. If the interface is down, the
891 * timer will get fired off when the open function
894 if (!newval->value) {
895 if (bond->params.arp_validate)
896 bond->recv_probe = NULL;
897 cancel_delayed_work_sync(&bond->arp_work);
899 /* arp_validate can be set only in active-backup mode */
900 bond->recv_probe = bond_arp_rcv;
901 cancel_delayed_work_sync(&bond->mii_work);
902 queue_delayed_work(bond->wq, &bond->arp_work, 0);
909 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
911 unsigned long last_rx)
913 __be32 *targets = bond->params.arp_targets;
914 struct list_head *iter;
917 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
918 bond_for_each_slave(bond, slave, iter)
919 slave->target_last_arp_rx[slot] = last_rx;
920 targets[slot] = target;
924 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
926 __be32 *targets = bond->params.arp_targets;
929 if (!bond_is_ip_target_ok(target)) {
930 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
935 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
936 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
941 ind = bond_get_targets_ip(targets, 0); /* first free slot */
943 netdev_err(bond->dev, "ARP target table is full!\n");
947 netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
949 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
954 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
958 /* not to race with bond_arp_rcv */
959 write_lock_bh(&bond->lock);
960 ret = _bond_option_arp_ip_target_add(bond, target);
961 write_unlock_bh(&bond->lock);
966 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
968 __be32 *targets = bond->params.arp_targets;
969 struct list_head *iter;
971 unsigned long *targets_rx;
974 if (!bond_is_ip_target_ok(target)) {
975 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
980 ind = bond_get_targets_ip(targets, target);
982 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
987 if (ind == 0 && !targets[1] && bond->params.arp_interval)
988 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
990 netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
992 /* not to race with bond_arp_rcv */
993 write_lock_bh(&bond->lock);
995 bond_for_each_slave(bond, slave, iter) {
996 targets_rx = slave->target_last_arp_rx;
997 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
998 targets_rx[i] = targets_rx[i+1];
1001 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1002 targets[i] = targets[i+1];
1005 write_unlock_bh(&bond->lock);
1010 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1014 /* not to race with bond_arp_rcv */
1015 write_lock_bh(&bond->lock);
1016 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1017 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1018 write_unlock_bh(&bond->lock);
1021 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1022 const struct bond_opt_value *newval)
1027 if (newval->string) {
1028 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1029 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1033 if (newval->string[0] == '+')
1034 ret = bond_option_arp_ip_target_add(bond, target);
1035 else if (newval->string[0] == '-')
1036 ret = bond_option_arp_ip_target_rem(bond, target);
1038 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1040 target = newval->value;
1041 ret = bond_option_arp_ip_target_add(bond, target);
1047 static int bond_option_arp_validate_set(struct bonding *bond,
1048 const struct bond_opt_value *newval)
1050 netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1051 newval->string, newval->value);
1053 if (bond->dev->flags & IFF_UP) {
1055 bond->recv_probe = NULL;
1056 else if (bond->params.arp_interval)
1057 bond->recv_probe = bond_arp_rcv;
1059 bond->params.arp_validate = newval->value;
1064 static int bond_option_arp_all_targets_set(struct bonding *bond,
1065 const struct bond_opt_value *newval)
1067 netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1068 newval->string, newval->value);
1069 bond->params.arp_all_targets = newval->value;
1074 static int bond_option_primary_set(struct bonding *bond,
1075 const struct bond_opt_value *newval)
1077 char *p, *primary = newval->string;
1078 struct list_head *iter;
1079 struct slave *slave;
1082 read_lock(&bond->lock);
1083 write_lock_bh(&bond->curr_slave_lock);
1085 p = strchr(primary, '\n');
1088 /* check to see if we are clearing primary */
1089 if (!strlen(primary)) {
1090 netdev_info(bond->dev, "Setting primary slave to None\n");
1091 bond->primary_slave = NULL;
1092 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1093 bond_select_active_slave(bond);
1097 bond_for_each_slave(bond, slave, iter) {
1098 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1099 netdev_info(bond->dev, "Setting %s as primary slave\n",
1101 bond->primary_slave = slave;
1102 strcpy(bond->params.primary, slave->dev->name);
1103 bond_select_active_slave(bond);
1108 if (bond->primary_slave) {
1109 netdev_info(bond->dev, "Setting primary slave to None\n");
1110 bond->primary_slave = NULL;
1111 bond_select_active_slave(bond);
1113 strncpy(bond->params.primary, primary, IFNAMSIZ);
1114 bond->params.primary[IFNAMSIZ - 1] = 0;
1116 netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1117 primary, bond->dev->name);
1120 write_unlock_bh(&bond->curr_slave_lock);
1121 read_unlock(&bond->lock);
1122 unblock_netpoll_tx();
1127 static int bond_option_primary_reselect_set(struct bonding *bond,
1128 const struct bond_opt_value *newval)
1130 netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1131 newval->string, newval->value);
1132 bond->params.primary_reselect = newval->value;
1135 write_lock_bh(&bond->curr_slave_lock);
1136 bond_select_active_slave(bond);
1137 write_unlock_bh(&bond->curr_slave_lock);
1138 unblock_netpoll_tx();
1143 static int bond_option_fail_over_mac_set(struct bonding *bond,
1144 const struct bond_opt_value *newval)
1146 netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1147 newval->string, newval->value);
1148 bond->params.fail_over_mac = newval->value;
1153 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1154 const struct bond_opt_value *newval)
1156 netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1157 newval->string, newval->value);
1158 bond->params.xmit_policy = newval->value;
1163 static int bond_option_resend_igmp_set(struct bonding *bond,
1164 const struct bond_opt_value *newval)
1166 netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1168 bond->params.resend_igmp = newval->value;
1173 static int bond_option_num_peer_notif_set(struct bonding *bond,
1174 const struct bond_opt_value *newval)
1176 bond->params.num_peer_notif = newval->value;
1181 static int bond_option_all_slaves_active_set(struct bonding *bond,
1182 const struct bond_opt_value *newval)
1184 struct list_head *iter;
1185 struct slave *slave;
1187 if (newval->value == bond->params.all_slaves_active)
1189 bond->params.all_slaves_active = newval->value;
1190 bond_for_each_slave(bond, slave, iter) {
1191 if (!bond_is_active_slave(slave)) {
1193 slave->inactive = 0;
1195 slave->inactive = 1;
1202 static int bond_option_min_links_set(struct bonding *bond,
1203 const struct bond_opt_value *newval)
1205 netdev_info(bond->dev, "Setting min links value to %llu\n",
1207 bond->params.min_links = newval->value;
1212 static int bond_option_lp_interval_set(struct bonding *bond,
1213 const struct bond_opt_value *newval)
1215 bond->params.lp_interval = newval->value;
1220 static int bond_option_pps_set(struct bonding *bond,
1221 const struct bond_opt_value *newval)
1223 bond->params.packets_per_slave = newval->value;
1224 if (newval->value > 0) {
1225 bond->params.reciprocal_packets_per_slave =
1226 reciprocal_value(newval->value);
1228 /* reciprocal_packets_per_slave is unused if
1229 * packets_per_slave is 0 or 1, just initialize it
1231 bond->params.reciprocal_packets_per_slave =
1232 (struct reciprocal_value) { 0 };
1238 static int bond_option_lacp_rate_set(struct bonding *bond,
1239 const struct bond_opt_value *newval)
1241 netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1242 newval->string, newval->value);
1243 bond->params.lacp_fast = newval->value;
1244 bond_3ad_update_lacp_rate(bond);
1249 static int bond_option_ad_select_set(struct bonding *bond,
1250 const struct bond_opt_value *newval)
1252 netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1253 newval->string, newval->value);
1254 bond->params.ad_select = newval->value;
1259 static int bond_option_queue_id_set(struct bonding *bond,
1260 const struct bond_opt_value *newval)
1262 struct slave *slave, *update_slave;
1263 struct net_device *sdev;
1264 struct list_head *iter;
1269 /* delim will point to queue id if successful */
1270 delim = strchr(newval->string, ':');
1274 /* Terminate string that points to device name and bump it
1275 * up one, so we can read the queue id there.
1278 if (sscanf(++delim, "%hd\n", &qid) != 1)
1281 /* Check buffer length, valid ifname and queue id */
1282 if (!dev_valid_name(newval->string) ||
1283 qid > bond->dev->real_num_tx_queues)
1286 /* Get the pointer to that interface if it exists */
1287 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1291 /* Search for thes slave and check for duplicate qids */
1292 update_slave = NULL;
1293 bond_for_each_slave(bond, slave, iter) {
1294 if (sdev == slave->dev)
1295 /* We don't need to check the matching
1296 * slave for dups, since we're overwriting it
1298 update_slave = slave;
1299 else if (qid && qid == slave->queue_id) {
1307 /* Actually set the qids for the slave */
1308 update_slave->queue_id = qid;
1314 netdev_info(bond->dev, "invalid input for queue_id set\n");
1320 static int bond_option_slaves_set(struct bonding *bond,
1321 const struct bond_opt_value *newval)
1323 char command[IFNAMSIZ + 1] = { 0, };
1324 struct net_device *dev;
1328 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1329 ifname = command + 1;
1330 if ((strlen(command) <= 1) ||
1331 !dev_valid_name(ifname))
1334 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1336 netdev_info(bond->dev, "interface %s does not exist!\n",
1342 switch (command[0]) {
1344 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1345 ret = bond_enslave(bond->dev, dev);
1349 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1350 ret = bond_release(bond->dev, dev);
1361 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1366 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1367 const struct bond_opt_value *newval)
1369 netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1370 newval->string, newval->value);
1371 bond->params.tlb_dynamic_lb = newval->value;