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>
19 #include <net/bonding.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[BOND_OPT_LAST] = {
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,
385 /* Searches for an option by name */
386 const struct bond_option *bond_opt_get_by_name(const char *name)
388 const struct bond_option *opt;
391 for (option = 0; option < BOND_OPT_LAST; option++) {
392 opt = bond_opt_get(option);
393 if (opt && !strcmp(opt->name, name))
400 /* Searches for a value in opt's values[] table */
401 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
403 const struct bond_option *opt;
406 opt = bond_opt_get(option);
409 for (i = 0; opt->values && opt->values[i].string; i++)
410 if (opt->values[i].value == val)
411 return &opt->values[i];
416 /* Searches for a value in opt's values[] table which matches the flagmask */
417 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
422 for (i = 0; opt->values && opt->values[i].string; i++)
423 if (opt->values[i].flags & flagmask)
424 return &opt->values[i];
429 /* If maxval is missing then there's no range to check. In case minval is
430 * missing then it's considered to be 0.
432 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
434 const struct bond_opt_value *minval, *maxval;
436 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
437 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
438 if (!maxval || (minval && val < minval->value) || val > maxval->value)
445 * bond_opt_parse - parse option value
446 * @opt: the option to parse against
447 * @val: value to parse
449 * This function tries to extract the value from @val and check if it's
450 * a possible match for the option and returns NULL if a match isn't found,
451 * or the struct_opt_value that matched. It also strips the new line from
452 * @val->string if it's present.
454 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
455 struct bond_opt_value *val)
457 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
458 const struct bond_opt_value *tbl;
459 const struct bond_opt_value *ret = NULL;
463 /* No parsing if the option wants a raw val */
464 if (opt->flags & BOND_OPTFLAG_RAWVAL)
471 /* ULLONG_MAX is used to bypass string processing */
472 checkval = val->value != ULLONG_MAX;
476 p = strchr(val->string, '\n');
479 for (p = val->string; *p; p++)
480 if (!(isdigit(*p) || isspace(*p)))
482 /* The following code extracts the string to match or the value
483 * and sets checkval appropriately
486 rv = sscanf(val->string, "%32s", valstr);
488 rv = sscanf(val->string, "%llu", &val->value);
495 for (i = 0; tbl[i].string; i++) {
496 /* Check for exact match */
498 if (val->value == tbl[i].value)
501 if (!strcmp(valstr, "default") &&
502 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
505 if (!strcmp(valstr, tbl[i].string))
508 /* Found an exact match */
512 /* Possible range match */
513 if (checkval && bond_opt_check_range(opt, val->value))
519 /* Check opt's dependencies against bond mode and currently set options */
520 static int bond_opt_check_deps(struct bonding *bond,
521 const struct bond_option *opt)
523 struct bond_params *params = &bond->params;
525 if (test_bit(params->mode, &opt->unsuppmodes))
527 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
529 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
535 static void bond_opt_dep_print(struct bonding *bond,
536 const struct bond_option *opt)
538 const struct bond_opt_value *modeval;
539 struct bond_params *params;
541 params = &bond->params;
542 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
543 if (test_bit(params->mode, &opt->unsuppmodes))
544 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
545 opt->name, modeval->string, modeval->value);
548 static void bond_opt_error_interpret(struct bonding *bond,
549 const struct bond_option *opt,
550 int error, const struct bond_opt_value *val)
552 const struct bond_opt_value *minval, *maxval;
559 /* sometimes RAWVAL opts may have new lines */
560 p = strchr(val->string, '\n');
563 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
564 opt->name, val->string);
566 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
567 opt->name, val->value);
570 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
571 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
574 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
575 opt->name, minval ? minval->value : 0, maxval->value);
578 bond_opt_dep_print(bond, opt);
581 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
585 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
594 * __bond_opt_set - set a bonding option
595 * @bond: target bond device
596 * @option: option to set
597 * @val: value to set it to
599 * This function is used to change the bond's option value, it can be
600 * used for both enabling/changing an option and for disabling it. RTNL lock
601 * must be obtained before calling this function.
603 int __bond_opt_set(struct bonding *bond,
604 unsigned int option, struct bond_opt_value *val)
606 const struct bond_opt_value *retval = NULL;
607 const struct bond_option *opt;
612 opt = bond_opt_get(option);
613 if (WARN_ON(!val) || WARN_ON(!opt))
615 ret = bond_opt_check_deps(bond, opt);
618 retval = bond_opt_parse(opt, val);
623 ret = opt->set(bond, retval);
626 bond_opt_error_interpret(bond, opt, ret, val);
628 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
634 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
635 * @bond: target bond device
636 * @option: option to set
637 * @buf: value to set it to
639 * This function tries to acquire RTNL without blocking and if successful
640 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
642 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
644 struct bond_opt_value optval;
648 return restart_syscall();
649 bond_opt_initstr(&optval, buf);
650 ret = __bond_opt_set(bond, option, &optval);
657 * bond_opt_get - get a pointer to an option
658 * @option: option for which to return a pointer
660 * This function checks if option is valid and if so returns a pointer
661 * to its entry in the bond_opts[] option array.
663 const struct bond_option *bond_opt_get(unsigned int option)
665 if (!BOND_OPT_VALID(option))
668 return &bond_opts[option];
671 static int bond_option_mode_set(struct bonding *bond,
672 const struct bond_opt_value *newval)
674 if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
675 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
677 /* disable arp monitoring */
678 bond->params.arp_interval = 0;
679 /* set miimon to default value */
680 bond->params.miimon = BOND_DEFAULT_MIIMON;
681 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
682 bond->params.miimon);
685 /* don't cache arp_validate between modes */
686 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
687 bond->params.mode = newval->value;
692 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
695 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
698 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
700 struct slave *slave = rcu_dereference(bond->curr_active_slave);
702 return __bond_option_active_slave_get(bond, slave);
705 static int bond_option_active_slave_set(struct bonding *bond,
706 const struct bond_opt_value *newval)
708 char ifname[IFNAMSIZ] = { 0, };
709 struct net_device *slave_dev;
712 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
713 if (!strlen(ifname) || newval->string[0] == '\n') {
716 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
722 if (!netif_is_bond_slave(slave_dev)) {
723 netdev_err(bond->dev, "Device %s is not bonding slave\n",
728 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
729 netdev_err(bond->dev, "Device %s is not our slave\n",
736 /* check to see if we are clearing active */
738 netdev_info(bond->dev, "Clearing current active slave\n");
739 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
740 bond_select_active_slave(bond);
742 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
743 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
747 if (new_active == old_active) {
749 netdev_info(bond->dev, "%s is already the current active slave\n",
750 new_active->dev->name);
752 if (old_active && (new_active->link == BOND_LINK_UP) &&
753 bond_slave_is_up(new_active)) {
754 netdev_info(bond->dev, "Setting %s as active slave\n",
755 new_active->dev->name);
756 bond_change_active_slave(bond, new_active);
758 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
759 new_active->dev->name,
760 new_active->dev->name);
765 unblock_netpoll_tx();
770 /* There are two tricky bits here. First, if MII monitoring is activated, then
771 * we must disable ARP monitoring. Second, if the timer isn't running, we must
774 static int bond_option_miimon_set(struct bonding *bond,
775 const struct bond_opt_value *newval)
777 netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
779 bond->params.miimon = newval->value;
780 if (bond->params.updelay)
781 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
782 bond->params.updelay * bond->params.miimon);
783 if (bond->params.downdelay)
784 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
785 bond->params.downdelay * bond->params.miimon);
786 if (newval->value && bond->params.arp_interval) {
787 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
788 bond->params.arp_interval = 0;
789 if (bond->params.arp_validate)
790 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
792 if (bond->dev->flags & IFF_UP) {
793 /* If the interface is up, we may need to fire off
794 * the MII timer. If the interface is down, the
795 * timer will get fired off when the open function
798 if (!newval->value) {
799 cancel_delayed_work_sync(&bond->mii_work);
801 cancel_delayed_work_sync(&bond->arp_work);
802 queue_delayed_work(bond->wq, &bond->mii_work, 0);
809 /* Set up and down delays. These must be multiples of the
810 * MII monitoring value, and are stored internally as the multiplier.
811 * Thus, we must translate to MS for the real world.
813 static int bond_option_updelay_set(struct bonding *bond,
814 const struct bond_opt_value *newval)
816 int value = newval->value;
818 if (!bond->params.miimon) {
819 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
822 if ((value % bond->params.miimon) != 0) {
823 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
824 value, bond->params.miimon,
825 (value / bond->params.miimon) *
826 bond->params.miimon);
828 bond->params.updelay = value / bond->params.miimon;
829 netdev_info(bond->dev, "Setting up delay to %d\n",
830 bond->params.updelay * bond->params.miimon);
835 static int bond_option_downdelay_set(struct bonding *bond,
836 const struct bond_opt_value *newval)
838 int value = newval->value;
840 if (!bond->params.miimon) {
841 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
844 if ((value % bond->params.miimon) != 0) {
845 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
846 value, bond->params.miimon,
847 (value / bond->params.miimon) *
848 bond->params.miimon);
850 bond->params.downdelay = value / bond->params.miimon;
851 netdev_info(bond->dev, "Setting down delay to %d\n",
852 bond->params.downdelay * bond->params.miimon);
857 static int bond_option_use_carrier_set(struct bonding *bond,
858 const struct bond_opt_value *newval)
860 netdev_info(bond->dev, "Setting use_carrier to %llu\n",
862 bond->params.use_carrier = newval->value;
867 /* There are two tricky bits here. First, if ARP monitoring is activated, then
868 * we must disable MII monitoring. Second, if the ARP timer isn't running,
871 static int bond_option_arp_interval_set(struct bonding *bond,
872 const struct bond_opt_value *newval)
874 netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
876 bond->params.arp_interval = newval->value;
878 if (bond->params.miimon) {
879 netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
880 bond->params.miimon = 0;
882 if (!bond->params.arp_targets[0])
883 netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
885 if (bond->dev->flags & IFF_UP) {
886 /* If the interface is up, we may need to fire off
887 * the ARP timer. If the interface is down, the
888 * timer will get fired off when the open function
891 if (!newval->value) {
892 if (bond->params.arp_validate)
893 bond->recv_probe = NULL;
894 cancel_delayed_work_sync(&bond->arp_work);
896 /* arp_validate can be set only in active-backup mode */
897 bond->recv_probe = bond_arp_rcv;
898 cancel_delayed_work_sync(&bond->mii_work);
899 queue_delayed_work(bond->wq, &bond->arp_work, 0);
906 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
908 unsigned long last_rx)
910 __be32 *targets = bond->params.arp_targets;
911 struct list_head *iter;
914 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
915 bond_for_each_slave(bond, slave, iter)
916 slave->target_last_arp_rx[slot] = last_rx;
917 targets[slot] = target;
921 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
923 __be32 *targets = bond->params.arp_targets;
926 if (!bond_is_ip_target_ok(target)) {
927 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
932 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
933 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
938 ind = bond_get_targets_ip(targets, 0); /* first free slot */
940 netdev_err(bond->dev, "ARP target table is full!\n");
944 netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
946 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
951 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
953 return _bond_option_arp_ip_target_add(bond, target);
956 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
958 __be32 *targets = bond->params.arp_targets;
959 struct list_head *iter;
961 unsigned long *targets_rx;
964 if (!bond_is_ip_target_ok(target)) {
965 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
970 ind = bond_get_targets_ip(targets, target);
972 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
977 if (ind == 0 && !targets[1] && bond->params.arp_interval)
978 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
980 netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
982 bond_for_each_slave(bond, slave, iter) {
983 targets_rx = slave->target_last_arp_rx;
984 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
985 targets_rx[i] = targets_rx[i+1];
988 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
989 targets[i] = targets[i+1];
995 void bond_option_arp_ip_targets_clear(struct bonding *bond)
999 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1000 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1003 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1004 const struct bond_opt_value *newval)
1009 if (newval->string) {
1010 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1011 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1015 if (newval->string[0] == '+')
1016 ret = bond_option_arp_ip_target_add(bond, target);
1017 else if (newval->string[0] == '-')
1018 ret = bond_option_arp_ip_target_rem(bond, target);
1020 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1022 target = newval->value;
1023 ret = bond_option_arp_ip_target_add(bond, target);
1029 static int bond_option_arp_validate_set(struct bonding *bond,
1030 const struct bond_opt_value *newval)
1032 netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1033 newval->string, newval->value);
1035 if (bond->dev->flags & IFF_UP) {
1037 bond->recv_probe = NULL;
1038 else if (bond->params.arp_interval)
1039 bond->recv_probe = bond_arp_rcv;
1041 bond->params.arp_validate = newval->value;
1046 static int bond_option_arp_all_targets_set(struct bonding *bond,
1047 const struct bond_opt_value *newval)
1049 netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1050 newval->string, newval->value);
1051 bond->params.arp_all_targets = newval->value;
1056 static int bond_option_primary_set(struct bonding *bond,
1057 const struct bond_opt_value *newval)
1059 char *p, *primary = newval->string;
1060 struct list_head *iter;
1061 struct slave *slave;
1065 p = strchr(primary, '\n');
1068 /* check to see if we are clearing primary */
1069 if (!strlen(primary)) {
1070 netdev_info(bond->dev, "Setting primary slave to None\n");
1071 RCU_INIT_POINTER(bond->primary_slave, NULL);
1072 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1073 bond_select_active_slave(bond);
1077 bond_for_each_slave(bond, slave, iter) {
1078 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1079 netdev_info(bond->dev, "Setting %s as primary slave\n",
1081 rcu_assign_pointer(bond->primary_slave, slave);
1082 strcpy(bond->params.primary, slave->dev->name);
1083 bond_select_active_slave(bond);
1088 if (rtnl_dereference(bond->primary_slave)) {
1089 netdev_info(bond->dev, "Setting primary slave to None\n");
1090 RCU_INIT_POINTER(bond->primary_slave, NULL);
1091 bond_select_active_slave(bond);
1093 strncpy(bond->params.primary, primary, IFNAMSIZ);
1094 bond->params.primary[IFNAMSIZ - 1] = 0;
1096 netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1097 primary, bond->dev->name);
1100 unblock_netpoll_tx();
1105 static int bond_option_primary_reselect_set(struct bonding *bond,
1106 const struct bond_opt_value *newval)
1108 netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1109 newval->string, newval->value);
1110 bond->params.primary_reselect = newval->value;
1113 bond_select_active_slave(bond);
1114 unblock_netpoll_tx();
1119 static int bond_option_fail_over_mac_set(struct bonding *bond,
1120 const struct bond_opt_value *newval)
1122 netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1123 newval->string, newval->value);
1124 bond->params.fail_over_mac = newval->value;
1129 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1130 const struct bond_opt_value *newval)
1132 netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1133 newval->string, newval->value);
1134 bond->params.xmit_policy = newval->value;
1139 static int bond_option_resend_igmp_set(struct bonding *bond,
1140 const struct bond_opt_value *newval)
1142 netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1144 bond->params.resend_igmp = newval->value;
1149 static int bond_option_num_peer_notif_set(struct bonding *bond,
1150 const struct bond_opt_value *newval)
1152 bond->params.num_peer_notif = newval->value;
1157 static int bond_option_all_slaves_active_set(struct bonding *bond,
1158 const struct bond_opt_value *newval)
1160 struct list_head *iter;
1161 struct slave *slave;
1163 if (newval->value == bond->params.all_slaves_active)
1165 bond->params.all_slaves_active = newval->value;
1166 bond_for_each_slave(bond, slave, iter) {
1167 if (!bond_is_active_slave(slave)) {
1169 slave->inactive = 0;
1171 slave->inactive = 1;
1178 static int bond_option_min_links_set(struct bonding *bond,
1179 const struct bond_opt_value *newval)
1181 netdev_info(bond->dev, "Setting min links value to %llu\n",
1183 bond->params.min_links = newval->value;
1184 bond_set_carrier(bond);
1189 static int bond_option_lp_interval_set(struct bonding *bond,
1190 const struct bond_opt_value *newval)
1192 bond->params.lp_interval = newval->value;
1197 static int bond_option_pps_set(struct bonding *bond,
1198 const struct bond_opt_value *newval)
1200 bond->params.packets_per_slave = newval->value;
1201 if (newval->value > 0) {
1202 bond->params.reciprocal_packets_per_slave =
1203 reciprocal_value(newval->value);
1205 /* reciprocal_packets_per_slave is unused if
1206 * packets_per_slave is 0 or 1, just initialize it
1208 bond->params.reciprocal_packets_per_slave =
1209 (struct reciprocal_value) { 0 };
1215 static int bond_option_lacp_rate_set(struct bonding *bond,
1216 const struct bond_opt_value *newval)
1218 netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1219 newval->string, newval->value);
1220 bond->params.lacp_fast = newval->value;
1221 bond_3ad_update_lacp_rate(bond);
1226 static int bond_option_ad_select_set(struct bonding *bond,
1227 const struct bond_opt_value *newval)
1229 netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1230 newval->string, newval->value);
1231 bond->params.ad_select = newval->value;
1236 static int bond_option_queue_id_set(struct bonding *bond,
1237 const struct bond_opt_value *newval)
1239 struct slave *slave, *update_slave;
1240 struct net_device *sdev;
1241 struct list_head *iter;
1246 /* delim will point to queue id if successful */
1247 delim = strchr(newval->string, ':');
1251 /* Terminate string that points to device name and bump it
1252 * up one, so we can read the queue id there.
1255 if (sscanf(++delim, "%hd\n", &qid) != 1)
1258 /* Check buffer length, valid ifname and queue id */
1259 if (!dev_valid_name(newval->string) ||
1260 qid > bond->dev->real_num_tx_queues)
1263 /* Get the pointer to that interface if it exists */
1264 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1268 /* Search for thes slave and check for duplicate qids */
1269 update_slave = NULL;
1270 bond_for_each_slave(bond, slave, iter) {
1271 if (sdev == slave->dev)
1272 /* We don't need to check the matching
1273 * slave for dups, since we're overwriting it
1275 update_slave = slave;
1276 else if (qid && qid == slave->queue_id) {
1284 /* Actually set the qids for the slave */
1285 update_slave->queue_id = qid;
1291 netdev_info(bond->dev, "invalid input for queue_id set\n");
1297 static int bond_option_slaves_set(struct bonding *bond,
1298 const struct bond_opt_value *newval)
1300 char command[IFNAMSIZ + 1] = { 0, };
1301 struct net_device *dev;
1305 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1306 ifname = command + 1;
1307 if ((strlen(command) <= 1) ||
1308 !dev_valid_name(ifname))
1311 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1313 netdev_info(bond->dev, "interface %s does not exist!\n",
1319 switch (command[0]) {
1321 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1322 ret = bond_enslave(bond->dev, dev);
1326 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1327 ret = bond_release(bond->dev, dev);
1338 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1343 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1344 const struct bond_opt_value *newval)
1346 netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1347 newval->string, newval->value);
1348 bond->params.tlb_dynamic_lb = newval->value;