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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 #include <linux/errno.h>
16 #include <linux/netdevice.h>
17 #include <linux/rwlock.h>
18 #include <linux/rcupdate.h>
19 #include <linux/ctype.h>
20 #include <linux/inet.h>
23 static struct bond_opt_value bond_mode_tbl[] = {
24 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
25 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
26 { "balance-xor", BOND_MODE_XOR, 0},
27 { "broadcast", BOND_MODE_BROADCAST, 0},
28 { "802.3ad", BOND_MODE_8023AD, 0},
29 { "balance-tlb", BOND_MODE_TLB, 0},
30 { "balance-alb", BOND_MODE_ALB, 0},
34 static struct bond_opt_value bond_pps_tbl[] = {
35 { "default", 1, BOND_VALFLAG_DEFAULT},
36 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
40 static struct bond_opt_value bond_xmit_hashtype_tbl[] = {
41 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
42 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
43 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
44 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
45 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
49 static struct bond_opt_value bond_arp_validate_tbl[] = {
50 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
51 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
52 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
53 { "all", BOND_ARP_VALIDATE_ALL, 0},
57 static struct bond_opt_value bond_arp_all_targets_tbl[] = {
58 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
59 { "all", BOND_ARP_TARGETS_ALL, 0},
63 static struct bond_opt_value bond_fail_over_mac_tbl[] = {
64 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
65 { "active", BOND_FOM_ACTIVE, 0},
66 { "follow", BOND_FOM_FOLLOW, 0},
70 static struct bond_opt_value bond_intmax_tbl[] = {
71 { "off", 0, BOND_VALFLAG_DEFAULT},
72 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
75 static struct bond_opt_value bond_lacp_rate_tbl[] = {
76 { "slow", AD_LACP_SLOW, 0},
77 { "fast", AD_LACP_FAST, 0},
81 static struct bond_opt_value bond_ad_select_tbl[] = {
82 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
83 { "bandwidth", BOND_AD_BANDWIDTH, 0},
84 { "count", BOND_AD_COUNT, 0},
88 static struct bond_opt_value bond_num_peer_notif_tbl[] = {
90 { "maxval", 255, BOND_VALFLAG_MAX},
91 { "default", 1, BOND_VALFLAG_DEFAULT},
95 static struct bond_opt_value bond_primary_reselect_tbl[] = {
96 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
97 { "better", BOND_PRI_RESELECT_BETTER, 0},
98 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
102 static struct bond_opt_value bond_use_carrier_tbl[] = {
104 { "on", 1, BOND_VALFLAG_DEFAULT},
108 static struct bond_opt_value bond_all_slaves_active_tbl[] = {
109 { "off", 0, BOND_VALFLAG_DEFAULT},
114 static struct bond_opt_value bond_resend_igmp_tbl[] = {
116 { "maxval", 255, BOND_VALFLAG_MAX},
117 { "default", 1, BOND_VALFLAG_DEFAULT},
121 static struct bond_opt_value bond_lp_interval_tbl[] = {
122 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
123 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
126 static struct bond_option bond_opts[] = {
130 .desc = "bond device mode",
131 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
132 .values = bond_mode_tbl,
133 .set = bond_option_mode_set
135 [BOND_OPT_PACKETS_PER_SLAVE] = {
136 .id = BOND_OPT_PACKETS_PER_SLAVE,
137 .name = "packets_per_slave",
138 .desc = "Packets to send per slave in RR mode",
139 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
140 .values = bond_pps_tbl,
141 .set = bond_option_pps_set
143 [BOND_OPT_XMIT_HASH] = {
144 .id = BOND_OPT_XMIT_HASH,
145 .name = "xmit_hash_policy",
146 .desc = "balance-xor and 802.3ad hashing method",
147 .values = bond_xmit_hashtype_tbl,
148 .set = bond_option_xmit_hash_policy_set
150 [BOND_OPT_ARP_VALIDATE] = {
151 .id = BOND_OPT_ARP_VALIDATE,
152 .name = "arp_validate",
153 .desc = "validate src/dst of ARP probes",
154 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
156 .values = bond_arp_validate_tbl,
157 .set = bond_option_arp_validate_set
159 [BOND_OPT_ARP_ALL_TARGETS] = {
160 .id = BOND_OPT_ARP_ALL_TARGETS,
161 .name = "arp_all_targets",
162 .desc = "fail on any/all arp targets timeout",
163 .values = bond_arp_all_targets_tbl,
164 .set = bond_option_arp_all_targets_set
166 [BOND_OPT_FAIL_OVER_MAC] = {
167 .id = BOND_OPT_FAIL_OVER_MAC,
168 .name = "fail_over_mac",
169 .desc = "For active-backup, do not set all slaves to the same MAC",
170 .flags = BOND_OPTFLAG_NOSLAVES,
171 .values = bond_fail_over_mac_tbl,
172 .set = bond_option_fail_over_mac_set
174 [BOND_OPT_ARP_INTERVAL] = {
175 .id = BOND_OPT_ARP_INTERVAL,
176 .name = "arp_interval",
177 .desc = "arp interval in milliseconds",
178 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
180 .values = bond_intmax_tbl,
181 .set = bond_option_arp_interval_set
183 [BOND_OPT_ARP_TARGETS] = {
184 .id = BOND_OPT_ARP_TARGETS,
185 .name = "arp_ip_target",
186 .desc = "arp targets in n.n.n.n form",
187 .flags = BOND_OPTFLAG_RAWVAL,
188 .set = bond_option_arp_ip_targets_set
190 [BOND_OPT_DOWNDELAY] = {
191 .id = BOND_OPT_DOWNDELAY,
193 .desc = "Delay before considering link down, in milliseconds",
194 .values = bond_intmax_tbl,
195 .set = bond_option_downdelay_set
197 [BOND_OPT_UPDELAY] = {
198 .id = BOND_OPT_UPDELAY,
200 .desc = "Delay before considering link up, in milliseconds",
201 .values = bond_intmax_tbl,
202 .set = bond_option_updelay_set
204 [BOND_OPT_LACP_RATE] = {
205 .id = BOND_OPT_LACP_RATE,
207 .desc = "LACPDU tx rate to request from 802.3ad partner",
208 .flags = BOND_OPTFLAG_IFDOWN,
209 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
210 .values = bond_lacp_rate_tbl,
211 .set = bond_option_lacp_rate_set
213 [BOND_OPT_MINLINKS] = {
214 .id = BOND_OPT_MINLINKS,
216 .desc = "Minimum number of available links before turning on carrier",
217 .values = bond_intmax_tbl,
218 .set = bond_option_min_links_set
220 [BOND_OPT_AD_SELECT] = {
221 .id = BOND_OPT_AD_SELECT,
223 .desc = "803.ad aggregation selection logic",
224 .flags = BOND_OPTFLAG_IFDOWN,
225 .values = bond_ad_select_tbl,
226 .set = bond_option_ad_select_set
228 [BOND_OPT_NUM_PEER_NOTIF] = {
229 .id = BOND_OPT_NUM_PEER_NOTIF,
230 .name = "num_unsol_na",
231 .desc = "Number of peer notifications to send on failover event",
232 .values = bond_num_peer_notif_tbl,
233 .set = bond_option_num_peer_notif_set
235 [BOND_OPT_MIIMON] = {
236 .id = BOND_OPT_MIIMON,
238 .desc = "Link check interval in milliseconds",
239 .values = bond_intmax_tbl,
240 .set = bond_option_miimon_set
242 [BOND_OPT_PRIMARY] = {
243 .id = BOND_OPT_PRIMARY,
245 .desc = "Primary network device to use",
246 .flags = BOND_OPTFLAG_RAWVAL,
247 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
250 .set = bond_option_primary_set
252 [BOND_OPT_PRIMARY_RESELECT] = {
253 .id = BOND_OPT_PRIMARY_RESELECT,
254 .name = "primary_reselect",
255 .desc = "Reselect primary slave once it comes up",
256 .values = bond_primary_reselect_tbl,
257 .set = bond_option_primary_reselect_set
259 [BOND_OPT_USE_CARRIER] = {
260 .id = BOND_OPT_USE_CARRIER,
261 .name = "use_carrier",
262 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
263 .values = bond_use_carrier_tbl,
264 .set = bond_option_use_carrier_set
266 [BOND_OPT_ACTIVE_SLAVE] = {
267 .id = BOND_OPT_ACTIVE_SLAVE,
268 .name = "active_slave",
269 .desc = "Currently active slave",
270 .flags = BOND_OPTFLAG_RAWVAL,
271 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
274 .set = bond_option_active_slave_set
276 [BOND_OPT_QUEUE_ID] = {
277 .id = BOND_OPT_QUEUE_ID,
279 .desc = "Set queue id of a slave",
280 .flags = BOND_OPTFLAG_RAWVAL,
281 .set = bond_option_queue_id_set
283 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
284 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
285 .name = "all_slaves_active",
286 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
287 .values = bond_all_slaves_active_tbl,
288 .set = bond_option_all_slaves_active_set
290 [BOND_OPT_RESEND_IGMP] = {
291 .id = BOND_OPT_RESEND_IGMP,
292 .name = "resend_igmp",
293 .desc = "Number of IGMP membership reports to send on link failure",
294 .values = bond_resend_igmp_tbl,
295 .set = bond_option_resend_igmp_set
297 [BOND_OPT_LP_INTERVAL] = {
298 .id = BOND_OPT_LP_INTERVAL,
299 .name = "lp_interval",
300 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
301 .values = bond_lp_interval_tbl,
302 .set = bond_option_lp_interval_set
304 [BOND_OPT_SLAVES] = {
305 .id = BOND_OPT_SLAVES,
307 .desc = "Slave membership management",
308 .flags = BOND_OPTFLAG_RAWVAL,
309 .set = bond_option_slaves_set
314 /* Searches for a value in opt's values[] table */
315 struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
317 struct bond_option *opt;
320 opt = bond_opt_get(option);
323 for (i = 0; opt->values && opt->values[i].string; i++)
324 if (opt->values[i].value == val)
325 return &opt->values[i];
330 /* Searches for a value in opt's values[] table which matches the flagmask */
331 static struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
336 for (i = 0; opt->values && opt->values[i].string; i++)
337 if (opt->values[i].flags & flagmask)
338 return &opt->values[i];
343 /* If maxval is missing then there's no range to check. In case minval is
344 * missing then it's considered to be 0.
346 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
348 struct bond_opt_value *minval, *maxval;
350 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
351 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
352 if (!maxval || (minval && val < minval->value) || val > maxval->value)
359 * bond_opt_parse - parse option value
360 * @opt: the option to parse against
361 * @val: value to parse
363 * This function tries to extract the value from @val and check if it's
364 * a possible match for the option and returns NULL if a match isn't found,
365 * or the struct_opt_value that matched. It also strips the new line from
366 * @val->string if it's present.
368 struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
369 struct bond_opt_value *val)
371 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
372 struct bond_opt_value *tbl, *ret = NULL;
376 /* No parsing if the option wants a raw val */
377 if (opt->flags & BOND_OPTFLAG_RAWVAL)
384 /* ULLONG_MAX is used to bypass string processing */
385 checkval = val->value != ULLONG_MAX;
389 p = strchr(val->string, '\n');
392 for (p = val->string; *p; p++)
393 if (!(isdigit(*p) || isspace(*p)))
395 /* The following code extracts the string to match or the value
396 * and sets checkval appropriately
399 rv = sscanf(val->string, "%32s", valstr);
401 rv = sscanf(val->string, "%llu", &val->value);
408 for (i = 0; tbl[i].string; i++) {
409 /* Check for exact match */
411 if (val->value == tbl[i].value)
414 if (!strcmp(valstr, "default") &&
415 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
418 if (!strcmp(valstr, tbl[i].string))
421 /* Found an exact match */
425 /* Possible range match */
426 if (checkval && bond_opt_check_range(opt, val->value))
432 /* Check opt's dependencies against bond mode and currently set options */
433 static int bond_opt_check_deps(struct bonding *bond,
434 const struct bond_option *opt)
436 struct bond_params *params = &bond->params;
438 if (test_bit(params->mode, &opt->unsuppmodes))
440 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
442 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
448 static void bond_opt_dep_print(struct bonding *bond,
449 const struct bond_option *opt)
451 struct bond_opt_value *modeval;
452 struct bond_params *params;
454 params = &bond->params;
455 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
456 if (test_bit(params->mode, &opt->unsuppmodes))
457 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n",
458 bond->dev->name, opt->name,
459 modeval->string, modeval->value);
462 static void bond_opt_error_interpret(struct bonding *bond,
463 const struct bond_option *opt,
464 int error, struct bond_opt_value *val)
466 struct bond_opt_value *minval, *maxval;
473 /* sometimes RAWVAL opts may have new lines */
474 p = strchr(val->string, '\n');
477 pr_err("%s: option %s: invalid value (%s)\n",
478 bond->dev->name, opt->name, val->string);
480 pr_err("%s: option %s: invalid value (%llu)\n",
481 bond->dev->name, opt->name, val->value);
484 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
485 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
488 pr_err("%s: option %s: allowed values %llu - %llu\n",
489 bond->dev->name, opt->name, minval ? minval->value : 0,
493 bond_opt_dep_print(bond, opt);
496 pr_err("%s: option %s: unable to set because the bond device has slaves\n",
497 bond->dev->name, opt->name);
500 pr_err("%s: option %s: unable to set because the bond device is up\n",
501 bond->dev->name, opt->name);
509 * __bond_opt_set - set a bonding option
510 * @bond: target bond device
511 * @option: option to set
512 * @val: value to set it to
514 * This function is used to change the bond's option value, it can be
515 * used for both enabling/changing an option and for disabling it. RTNL lock
516 * must be obtained before calling this function.
518 int __bond_opt_set(struct bonding *bond,
519 unsigned int option, struct bond_opt_value *val)
521 struct bond_opt_value *retval = NULL;
522 const struct bond_option *opt;
527 opt = bond_opt_get(option);
528 if (WARN_ON(!val) || WARN_ON(!opt))
530 ret = bond_opt_check_deps(bond, opt);
533 retval = bond_opt_parse(opt, val);
538 ret = opt->set(bond, retval);
541 bond_opt_error_interpret(bond, opt, ret, val);
547 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
548 * @bond: target bond device
549 * @option: option to set
550 * @buf: value to set it to
552 * This function tries to acquire RTNL without blocking and if successful
553 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
555 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
557 struct bond_opt_value optval;
561 return restart_syscall();
562 bond_opt_initstr(&optval, buf);
563 ret = __bond_opt_set(bond, option, &optval);
570 * bond_opt_get - get a pointer to an option
571 * @option: option for which to return a pointer
573 * This function checks if option is valid and if so returns a pointer
574 * to its entry in the bond_opts[] option array.
576 struct bond_option *bond_opt_get(unsigned int option)
578 if (!BOND_OPT_VALID(option))
581 return &bond_opts[option];
584 int bond_option_mode_set(struct bonding *bond, struct bond_opt_value *newval)
586 if (BOND_NO_USES_ARP(newval->value) && bond->params.arp_interval) {
587 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
588 bond->dev->name, newval->string);
589 /* disable arp monitoring */
590 bond->params.arp_interval = 0;
591 /* set miimon to default value */
592 bond->params.miimon = BOND_DEFAULT_MIIMON;
593 pr_info("%s: Setting MII monitoring interval to %d\n",
594 bond->dev->name, bond->params.miimon);
597 /* don't cache arp_validate between modes */
598 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
599 bond->params.mode = newval->value;
604 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
607 return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL;
610 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
612 struct slave *slave = rcu_dereference(bond->curr_active_slave);
614 return __bond_option_active_slave_get(bond, slave);
617 struct net_device *bond_option_active_slave_get(struct bonding *bond)
619 return __bond_option_active_slave_get(bond, bond->curr_active_slave);
622 int bond_option_active_slave_set(struct bonding *bond,
623 struct bond_opt_value *newval)
625 char ifname[IFNAMSIZ] = { 0, };
626 struct net_device *slave_dev;
629 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
630 if (!strlen(ifname) || newval->string[0] == '\n') {
633 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
639 if (!netif_is_bond_slave(slave_dev)) {
640 pr_err("Device %s is not bonding slave\n",
645 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
646 pr_err("%s: Device %s is not our slave\n",
647 bond->dev->name, slave_dev->name);
653 write_lock_bh(&bond->curr_slave_lock);
655 /* check to see if we are clearing active */
657 pr_info("%s: Clearing current active slave\n", bond->dev->name);
658 rcu_assign_pointer(bond->curr_active_slave, NULL);
659 bond_select_active_slave(bond);
661 struct slave *old_active = bond->curr_active_slave;
662 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
666 if (new_active == old_active) {
668 pr_info("%s: %s is already the current active slave\n",
669 bond->dev->name, new_active->dev->name);
671 if (old_active && (new_active->link == BOND_LINK_UP) &&
672 IS_UP(new_active->dev)) {
673 pr_info("%s: Setting %s as active slave\n",
674 bond->dev->name, new_active->dev->name);
675 bond_change_active_slave(bond, new_active);
677 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down\n",
678 bond->dev->name, new_active->dev->name,
679 new_active->dev->name);
685 write_unlock_bh(&bond->curr_slave_lock);
686 unblock_netpoll_tx();
691 int bond_option_miimon_set(struct bonding *bond, struct bond_opt_value *newval)
693 pr_info("%s: Setting MII monitoring interval to %llu\n",
694 bond->dev->name, newval->value);
695 bond->params.miimon = newval->value;
696 if (bond->params.updelay)
697 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
699 bond->params.updelay * bond->params.miimon);
700 if (bond->params.downdelay)
701 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
703 bond->params.downdelay * bond->params.miimon);
704 if (newval->value && bond->params.arp_interval) {
705 pr_info("%s: MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n",
707 bond->params.arp_interval = 0;
708 if (bond->params.arp_validate)
709 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
711 if (bond->dev->flags & IFF_UP) {
712 /* If the interface is up, we may need to fire off
713 * the MII timer. If the interface is down, the
714 * timer will get fired off when the open function
717 if (!newval->value) {
718 cancel_delayed_work_sync(&bond->mii_work);
720 cancel_delayed_work_sync(&bond->arp_work);
721 queue_delayed_work(bond->wq, &bond->mii_work, 0);
728 int bond_option_updelay_set(struct bonding *bond, struct bond_opt_value *newval)
730 int value = newval->value;
732 if (!bond->params.miimon) {
733 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
737 if ((value % bond->params.miimon) != 0) {
738 pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
739 bond->dev->name, value,
741 (value / bond->params.miimon) *
742 bond->params.miimon);
744 bond->params.updelay = value / bond->params.miimon;
745 pr_info("%s: Setting up delay to %d\n",
746 bond->dev->name, bond->params.updelay * bond->params.miimon);
751 int bond_option_downdelay_set(struct bonding *bond,
752 struct bond_opt_value *newval)
754 int value = newval->value;
756 if (!bond->params.miimon) {
757 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
761 if ((value % bond->params.miimon) != 0) {
762 pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
763 bond->dev->name, value,
765 (value / bond->params.miimon) *
766 bond->params.miimon);
768 bond->params.downdelay = value / bond->params.miimon;
769 pr_info("%s: Setting down delay to %d\n",
770 bond->dev->name, bond->params.downdelay * bond->params.miimon);
775 int bond_option_use_carrier_set(struct bonding *bond,
776 struct bond_opt_value *newval)
778 pr_info("%s: Setting use_carrier to %llu\n",
779 bond->dev->name, newval->value);
780 bond->params.use_carrier = newval->value;
785 int bond_option_arp_interval_set(struct bonding *bond,
786 struct bond_opt_value *newval)
788 pr_info("%s: Setting ARP monitoring interval to %llu\n",
789 bond->dev->name, newval->value);
790 bond->params.arp_interval = newval->value;
792 if (bond->params.miimon) {
793 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring\n",
794 bond->dev->name, bond->dev->name);
795 bond->params.miimon = 0;
797 if (!bond->params.arp_targets[0])
798 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified\n",
801 if (bond->dev->flags & IFF_UP) {
802 /* If the interface is up, we may need to fire off
803 * the ARP timer. If the interface is down, the
804 * timer will get fired off when the open function
807 if (!newval->value) {
808 if (bond->params.arp_validate)
809 bond->recv_probe = NULL;
810 cancel_delayed_work_sync(&bond->arp_work);
812 /* arp_validate can be set only in active-backup mode */
813 if (bond->params.arp_validate)
814 bond->recv_probe = bond_arp_rcv;
815 cancel_delayed_work_sync(&bond->mii_work);
816 queue_delayed_work(bond->wq, &bond->arp_work, 0);
823 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
825 unsigned long last_rx)
827 __be32 *targets = bond->params.arp_targets;
828 struct list_head *iter;
831 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
832 bond_for_each_slave(bond, slave, iter)
833 slave->target_last_arp_rx[slot] = last_rx;
834 targets[slot] = target;
838 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
840 __be32 *targets = bond->params.arp_targets;
843 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
844 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
845 bond->dev->name, &target);
849 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
850 pr_err("%s: ARP target %pI4 is already present\n",
851 bond->dev->name, &target);
855 ind = bond_get_targets_ip(targets, 0); /* first free slot */
857 pr_err("%s: ARP target table is full!\n", bond->dev->name);
861 pr_info("%s: Adding ARP target %pI4\n", bond->dev->name, &target);
863 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
868 int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
872 /* not to race with bond_arp_rcv */
873 write_lock_bh(&bond->lock);
874 ret = _bond_option_arp_ip_target_add(bond, target);
875 write_unlock_bh(&bond->lock);
880 int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
882 __be32 *targets = bond->params.arp_targets;
883 struct list_head *iter;
885 unsigned long *targets_rx;
888 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
889 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
890 bond->dev->name, &target);
894 ind = bond_get_targets_ip(targets, target);
896 pr_err("%s: unable to remove nonexistent ARP target %pI4\n",
897 bond->dev->name, &target);
901 if (ind == 0 && !targets[1] && bond->params.arp_interval)
902 pr_warn("%s: Removing last arp target with arp_interval on\n",
905 pr_info("%s: Removing ARP target %pI4\n", bond->dev->name, &target);
907 /* not to race with bond_arp_rcv */
908 write_lock_bh(&bond->lock);
910 bond_for_each_slave(bond, slave, iter) {
911 targets_rx = slave->target_last_arp_rx;
912 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
913 targets_rx[i] = targets_rx[i+1];
916 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
917 targets[i] = targets[i+1];
920 write_unlock_bh(&bond->lock);
925 void bond_option_arp_ip_targets_clear(struct bonding *bond)
929 /* not to race with bond_arp_rcv */
930 write_lock_bh(&bond->lock);
931 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
932 _bond_options_arp_ip_target_set(bond, i, 0, 0);
933 write_unlock_bh(&bond->lock);
936 int bond_option_arp_ip_targets_set(struct bonding *bond,
937 struct bond_opt_value *newval)
942 if (newval->string) {
943 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
944 pr_err("%s: invalid ARP target %pI4 specified\n",
945 bond->dev->name, &target);
948 if (newval->string[0] == '+')
949 ret = bond_option_arp_ip_target_add(bond, target);
950 else if (newval->string[0] == '-')
951 ret = bond_option_arp_ip_target_rem(bond, target);
953 pr_err("no command found in arp_ip_targets file for bond %s - use +<addr> or -<addr>\n",
956 target = newval->value;
957 ret = bond_option_arp_ip_target_add(bond, target);
963 int bond_option_arp_validate_set(struct bonding *bond,
964 struct bond_opt_value *newval)
966 pr_info("%s: Setting arp_validate to %s (%llu)\n",
967 bond->dev->name, newval->string, newval->value);
969 if (bond->dev->flags & IFF_UP) {
971 bond->recv_probe = NULL;
972 else if (bond->params.arp_interval)
973 bond->recv_probe = bond_arp_rcv;
975 bond->params.arp_validate = newval->value;
980 int bond_option_arp_all_targets_set(struct bonding *bond,
981 struct bond_opt_value *newval)
983 pr_info("%s: Setting arp_all_targets to %s (%llu)\n",
984 bond->dev->name, newval->string, newval->value);
985 bond->params.arp_all_targets = newval->value;
990 int bond_option_primary_set(struct bonding *bond, struct bond_opt_value *newval)
992 char *p, *primary = newval->string;
993 struct list_head *iter;
997 read_lock(&bond->lock);
998 write_lock_bh(&bond->curr_slave_lock);
1000 p = strchr(primary, '\n');
1003 /* check to see if we are clearing primary */
1004 if (!strlen(primary)) {
1005 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1006 bond->primary_slave = NULL;
1007 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1008 bond_select_active_slave(bond);
1012 bond_for_each_slave(bond, slave, iter) {
1013 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1014 pr_info("%s: Setting %s as primary slave\n",
1015 bond->dev->name, slave->dev->name);
1016 bond->primary_slave = slave;
1017 strcpy(bond->params.primary, slave->dev->name);
1018 bond_select_active_slave(bond);
1023 if (bond->primary_slave) {
1024 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1025 bond->primary_slave = NULL;
1026 bond_select_active_slave(bond);
1028 strncpy(bond->params.primary, primary, IFNAMSIZ);
1029 bond->params.primary[IFNAMSIZ - 1] = 0;
1031 pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet\n",
1032 bond->dev->name, primary, bond->dev->name);
1035 write_unlock_bh(&bond->curr_slave_lock);
1036 read_unlock(&bond->lock);
1037 unblock_netpoll_tx();
1042 int bond_option_primary_reselect_set(struct bonding *bond,
1043 struct bond_opt_value *newval)
1045 pr_info("%s: Setting primary_reselect to %s (%llu)\n",
1046 bond->dev->name, newval->string, newval->value);
1047 bond->params.primary_reselect = newval->value;
1050 write_lock_bh(&bond->curr_slave_lock);
1051 bond_select_active_slave(bond);
1052 write_unlock_bh(&bond->curr_slave_lock);
1053 unblock_netpoll_tx();
1058 int bond_option_fail_over_mac_set(struct bonding *bond,
1059 struct bond_opt_value *newval)
1061 pr_info("%s: Setting fail_over_mac to %s (%llu)\n",
1062 bond->dev->name, newval->string, newval->value);
1063 bond->params.fail_over_mac = newval->value;
1068 int bond_option_xmit_hash_policy_set(struct bonding *bond,
1069 struct bond_opt_value *newval)
1071 pr_info("%s: Setting xmit hash policy to %s (%llu)\n",
1072 bond->dev->name, newval->string, newval->value);
1073 bond->params.xmit_policy = newval->value;
1078 int bond_option_resend_igmp_set(struct bonding *bond,
1079 struct bond_opt_value *newval)
1081 pr_info("%s: Setting resend_igmp to %llu\n",
1082 bond->dev->name, newval->value);
1083 bond->params.resend_igmp = newval->value;
1088 int bond_option_num_peer_notif_set(struct bonding *bond,
1089 struct bond_opt_value *newval)
1091 bond->params.num_peer_notif = newval->value;
1096 int bond_option_all_slaves_active_set(struct bonding *bond,
1097 struct bond_opt_value *newval)
1099 struct list_head *iter;
1100 struct slave *slave;
1102 if (newval->value == bond->params.all_slaves_active)
1104 bond->params.all_slaves_active = newval->value;
1105 bond_for_each_slave(bond, slave, iter) {
1106 if (!bond_is_active_slave(slave)) {
1108 slave->inactive = 0;
1110 slave->inactive = 1;
1117 int bond_option_min_links_set(struct bonding *bond,
1118 struct bond_opt_value *newval)
1120 pr_info("%s: Setting min links value to %llu\n",
1121 bond->dev->name, newval->value);
1122 bond->params.min_links = newval->value;
1127 int bond_option_lp_interval_set(struct bonding *bond,
1128 struct bond_opt_value *newval)
1130 bond->params.lp_interval = newval->value;
1135 int bond_option_pps_set(struct bonding *bond, struct bond_opt_value *newval)
1137 bond->params.packets_per_slave = newval->value;
1138 if (newval->value > 0) {
1139 bond->params.reciprocal_packets_per_slave =
1140 reciprocal_value(newval->value);
1142 /* reciprocal_packets_per_slave is unused if
1143 * packets_per_slave is 0 or 1, just initialize it
1145 bond->params.reciprocal_packets_per_slave =
1146 (struct reciprocal_value) { 0 };
1152 int bond_option_lacp_rate_set(struct bonding *bond,
1153 struct bond_opt_value *newval)
1155 pr_info("%s: Setting LACP rate to %s (%llu)\n",
1156 bond->dev->name, newval->string, newval->value);
1157 bond->params.lacp_fast = newval->value;
1158 bond_3ad_update_lacp_rate(bond);
1163 int bond_option_ad_select_set(struct bonding *bond,
1164 struct bond_opt_value *newval)
1166 pr_info("%s: Setting ad_select to %s (%llu)\n",
1167 bond->dev->name, newval->string, newval->value);
1168 bond->params.ad_select = newval->value;
1173 int bond_option_queue_id_set(struct bonding *bond,
1174 struct bond_opt_value *newval)
1176 struct slave *slave, *update_slave;
1177 struct net_device *sdev;
1178 struct list_head *iter;
1183 /* delim will point to queue id if successful */
1184 delim = strchr(newval->string, ':');
1188 /* Terminate string that points to device name and bump it
1189 * up one, so we can read the queue id there.
1192 if (sscanf(++delim, "%hd\n", &qid) != 1)
1195 /* Check buffer length, valid ifname and queue id */
1196 if (!dev_valid_name(newval->string) ||
1197 qid > bond->dev->real_num_tx_queues)
1200 /* Get the pointer to that interface if it exists */
1201 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1205 /* Search for thes slave and check for duplicate qids */
1206 update_slave = NULL;
1207 bond_for_each_slave(bond, slave, iter) {
1208 if (sdev == slave->dev)
1209 /* We don't need to check the matching
1210 * slave for dups, since we're overwriting it
1212 update_slave = slave;
1213 else if (qid && qid == slave->queue_id) {
1221 /* Actually set the qids for the slave */
1222 update_slave->queue_id = qid;
1228 pr_info("invalid input for queue_id set for %s\n", bond->dev->name);
1234 int bond_option_slaves_set(struct bonding *bond, struct bond_opt_value *newval)
1236 char command[IFNAMSIZ + 1] = { 0, };
1237 struct net_device *dev;
1241 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1242 ifname = command + 1;
1243 if ((strlen(command) <= 1) ||
1244 !dev_valid_name(ifname))
1247 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1249 pr_info("%s: interface %s does not exist!\n",
1250 bond->dev->name, ifname);
1255 switch (command[0]) {
1257 pr_info("%s: Adding slave %s\n", bond->dev->name, dev->name);
1258 ret = bond_enslave(bond->dev, dev);
1262 pr_info("%s: Removing slave %s\n", bond->dev->name, dev->name);
1263 ret = bond_release(bond->dev, dev);
1274 pr_err("no command found in slaves file for bond %s - use +ifname or -ifname\n",