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/spinlock.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},
127 static struct bond_option bond_opts[] = {
131 .desc = "bond device mode",
132 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
133 .values = bond_mode_tbl,
134 .set = bond_option_mode_set
136 [BOND_OPT_PACKETS_PER_SLAVE] = {
137 .id = BOND_OPT_PACKETS_PER_SLAVE,
138 .name = "packets_per_slave",
139 .desc = "Packets to send per slave in RR mode",
140 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
141 .values = bond_pps_tbl,
142 .set = bond_option_pps_set
144 [BOND_OPT_XMIT_HASH] = {
145 .id = BOND_OPT_XMIT_HASH,
146 .name = "xmit_hash_policy",
147 .desc = "balance-xor and 802.3ad hashing method",
148 .values = bond_xmit_hashtype_tbl,
149 .set = bond_option_xmit_hash_policy_set
151 [BOND_OPT_ARP_VALIDATE] = {
152 .id = BOND_OPT_ARP_VALIDATE,
153 .name = "arp_validate",
154 .desc = "validate src/dst of ARP probes",
155 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP)),
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",
659 rcu_assign_pointer(bond->curr_active_slave, NULL);
660 bond_select_active_slave(bond);
662 struct slave *old_active = bond->curr_active_slave;
663 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
667 if (new_active == old_active) {
669 pr_info("%s: %s is already the current active slave.\n",
670 bond->dev->name, new_active->dev->name);
672 if (old_active && (new_active->link == BOND_LINK_UP) &&
673 IS_UP(new_active->dev)) {
674 pr_info("%s: Setting %s as active slave.\n",
675 bond->dev->name, new_active->dev->name);
676 bond_change_active_slave(bond, new_active);
678 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
679 bond->dev->name, new_active->dev->name,
680 new_active->dev->name);
686 write_unlock_bh(&bond->curr_slave_lock);
687 unblock_netpoll_tx();
692 int bond_option_miimon_set(struct bonding *bond, struct bond_opt_value *newval)
694 pr_info("%s: Setting MII monitoring interval to %llu.\n",
695 bond->dev->name, newval->value);
696 bond->params.miimon = newval->value;
697 if (bond->params.updelay)
698 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
700 bond->params.updelay * bond->params.miimon);
701 if (bond->params.downdelay)
702 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
704 bond->params.downdelay * bond->params.miimon);
705 if (newval->value && bond->params.arp_interval) {
706 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
708 bond->params.arp_interval = 0;
709 if (bond->params.arp_validate)
710 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
712 if (bond->dev->flags & IFF_UP) {
713 /* If the interface is up, we may need to fire off
714 * the MII timer. If the interface is down, the
715 * timer will get fired off when the open function
718 if (!newval->value) {
719 cancel_delayed_work_sync(&bond->mii_work);
721 cancel_delayed_work_sync(&bond->arp_work);
722 queue_delayed_work(bond->wq, &bond->mii_work, 0);
729 int bond_option_updelay_set(struct bonding *bond, struct bond_opt_value *newval)
731 int value = newval->value;
733 if (!bond->params.miimon) {
734 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
738 if ((value % bond->params.miimon) != 0) {
739 pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
740 bond->dev->name, value,
742 (value / bond->params.miimon) *
743 bond->params.miimon);
745 bond->params.updelay = value / bond->params.miimon;
746 pr_info("%s: Setting up delay to %d.\n",
748 bond->params.updelay * bond->params.miimon);
753 int bond_option_downdelay_set(struct bonding *bond,
754 struct bond_opt_value *newval)
756 int value = newval->value;
758 if (!bond->params.miimon) {
759 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
763 if ((value % bond->params.miimon) != 0) {
764 pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
765 bond->dev->name, value,
767 (value / bond->params.miimon) *
768 bond->params.miimon);
770 bond->params.downdelay = value / bond->params.miimon;
771 pr_info("%s: Setting down delay to %d.\n",
773 bond->params.downdelay * bond->params.miimon);
778 int bond_option_use_carrier_set(struct bonding *bond,
779 struct bond_opt_value *newval)
781 pr_info("%s: Setting use_carrier to %llu.\n",
782 bond->dev->name, newval->value);
783 bond->params.use_carrier = newval->value;
788 int bond_option_arp_interval_set(struct bonding *bond,
789 struct bond_opt_value *newval)
791 pr_info("%s: Setting ARP monitoring interval to %llu.\n",
792 bond->dev->name, newval->value);
793 bond->params.arp_interval = newval->value;
795 if (bond->params.miimon) {
796 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
797 bond->dev->name, bond->dev->name);
798 bond->params.miimon = 0;
800 if (!bond->params.arp_targets[0])
801 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
804 if (bond->dev->flags & IFF_UP) {
805 /* If the interface is up, we may need to fire off
806 * the ARP timer. If the interface is down, the
807 * timer will get fired off when the open function
810 if (!newval->value) {
811 if (bond->params.arp_validate)
812 bond->recv_probe = NULL;
813 cancel_delayed_work_sync(&bond->arp_work);
815 /* arp_validate can be set only in active-backup mode */
816 if (bond->params.arp_validate)
817 bond->recv_probe = bond_arp_rcv;
818 cancel_delayed_work_sync(&bond->mii_work);
819 queue_delayed_work(bond->wq, &bond->arp_work, 0);
826 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
828 unsigned long last_rx)
830 __be32 *targets = bond->params.arp_targets;
831 struct list_head *iter;
834 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
835 bond_for_each_slave(bond, slave, iter)
836 slave->target_last_arp_rx[slot] = last_rx;
837 targets[slot] = target;
841 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
843 __be32 *targets = bond->params.arp_targets;
846 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
847 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
848 bond->dev->name, &target);
852 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
853 pr_err("%s: ARP target %pI4 is already present\n",
854 bond->dev->name, &target);
858 ind = bond_get_targets_ip(targets, 0); /* first free slot */
860 pr_err("%s: ARP target table is full!\n",
865 pr_info("%s: adding ARP target %pI4.\n", bond->dev->name, &target);
867 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
872 int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
876 /* not to race with bond_arp_rcv */
877 write_lock_bh(&bond->lock);
878 ret = _bond_option_arp_ip_target_add(bond, target);
879 write_unlock_bh(&bond->lock);
884 int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
886 __be32 *targets = bond->params.arp_targets;
887 struct list_head *iter;
889 unsigned long *targets_rx;
892 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
893 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
894 bond->dev->name, &target);
898 ind = bond_get_targets_ip(targets, target);
900 pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
901 bond->dev->name, &target);
905 if (ind == 0 && !targets[1] && bond->params.arp_interval)
906 pr_warn("%s: removing last arp target with arp_interval on\n",
909 pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
912 /* not to race with bond_arp_rcv */
913 write_lock_bh(&bond->lock);
915 bond_for_each_slave(bond, slave, iter) {
916 targets_rx = slave->target_last_arp_rx;
917 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
918 targets_rx[i] = targets_rx[i+1];
921 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
922 targets[i] = targets[i+1];
925 write_unlock_bh(&bond->lock);
930 void bond_option_arp_ip_targets_clear(struct bonding *bond)
934 /* not to race with bond_arp_rcv */
935 write_lock_bh(&bond->lock);
936 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
937 _bond_options_arp_ip_target_set(bond, i, 0, 0);
938 write_unlock_bh(&bond->lock);
941 int bond_option_arp_ip_targets_set(struct bonding *bond,
942 struct bond_opt_value *newval)
947 if (newval->string) {
948 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
949 pr_err("%s: invalid ARP target %pI4 specified\n",
950 bond->dev->name, &target);
953 if (newval->string[0] == '+')
954 ret = bond_option_arp_ip_target_add(bond, target);
955 else if (newval->string[0] == '-')
956 ret = bond_option_arp_ip_target_rem(bond, target);
958 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
961 target = newval->value;
962 ret = bond_option_arp_ip_target_add(bond, target);
968 int bond_option_arp_validate_set(struct bonding *bond,
969 struct bond_opt_value *newval)
971 pr_info("%s: setting arp_validate to %s (%llu).\n",
972 bond->dev->name, newval->string, newval->value);
974 if (bond->dev->flags & IFF_UP) {
976 bond->recv_probe = NULL;
977 else if (bond->params.arp_interval)
978 bond->recv_probe = bond_arp_rcv;
980 bond->params.arp_validate = newval->value;
985 int bond_option_arp_all_targets_set(struct bonding *bond,
986 struct bond_opt_value *newval)
988 pr_info("%s: setting arp_all_targets to %s (%llu).\n",
989 bond->dev->name, newval->string, newval->value);
990 bond->params.arp_all_targets = newval->value;
995 int bond_option_primary_set(struct bonding *bond, struct bond_opt_value *newval)
997 char *p, *primary = newval->string;
998 struct list_head *iter;
1002 read_lock(&bond->lock);
1003 write_lock_bh(&bond->curr_slave_lock);
1005 p = strchr(primary, '\n');
1008 /* check to see if we are clearing primary */
1009 if (!strlen(primary)) {
1010 pr_info("%s: Setting primary slave to None.\n",
1012 bond->primary_slave = NULL;
1013 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1014 bond_select_active_slave(bond);
1018 bond_for_each_slave(bond, slave, iter) {
1019 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1020 pr_info("%s: Setting %s as primary slave.\n",
1021 bond->dev->name, slave->dev->name);
1022 bond->primary_slave = slave;
1023 strcpy(bond->params.primary, slave->dev->name);
1024 bond_select_active_slave(bond);
1029 if (bond->primary_slave) {
1030 pr_info("%s: Setting primary slave to None.\n",
1032 bond->primary_slave = NULL;
1033 bond_select_active_slave(bond);
1035 strncpy(bond->params.primary, primary, IFNAMSIZ);
1036 bond->params.primary[IFNAMSIZ - 1] = 0;
1038 pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet.\n",
1039 bond->dev->name, primary, bond->dev->name);
1042 write_unlock_bh(&bond->curr_slave_lock);
1043 read_unlock(&bond->lock);
1044 unblock_netpoll_tx();
1049 int bond_option_primary_reselect_set(struct bonding *bond,
1050 struct bond_opt_value *newval)
1052 pr_info("%s: setting primary_reselect to %s (%llu).\n",
1053 bond->dev->name, newval->string, newval->value);
1054 bond->params.primary_reselect = newval->value;
1057 write_lock_bh(&bond->curr_slave_lock);
1058 bond_select_active_slave(bond);
1059 write_unlock_bh(&bond->curr_slave_lock);
1060 unblock_netpoll_tx();
1065 int bond_option_fail_over_mac_set(struct bonding *bond,
1066 struct bond_opt_value *newval)
1068 pr_info("%s: Setting fail_over_mac to %s (%llu).\n",
1069 bond->dev->name, newval->string, newval->value);
1070 bond->params.fail_over_mac = newval->value;
1075 int bond_option_xmit_hash_policy_set(struct bonding *bond,
1076 struct bond_opt_value *newval)
1078 pr_info("%s: setting xmit hash policy to %s (%llu).\n",
1079 bond->dev->name, newval->string, newval->value);
1080 bond->params.xmit_policy = newval->value;
1085 int bond_option_resend_igmp_set(struct bonding *bond,
1086 struct bond_opt_value *newval)
1088 pr_info("%s: Setting resend_igmp to %llu.\n",
1089 bond->dev->name, newval->value);
1090 bond->params.resend_igmp = newval->value;
1095 int bond_option_num_peer_notif_set(struct bonding *bond,
1096 struct bond_opt_value *newval)
1098 bond->params.num_peer_notif = newval->value;
1103 int bond_option_all_slaves_active_set(struct bonding *bond,
1104 struct bond_opt_value *newval)
1106 struct list_head *iter;
1107 struct slave *slave;
1109 if (newval->value == bond->params.all_slaves_active)
1111 bond->params.all_slaves_active = newval->value;
1112 bond_for_each_slave(bond, slave, iter) {
1113 if (!bond_is_active_slave(slave)) {
1115 slave->inactive = 0;
1117 slave->inactive = 1;
1124 int bond_option_min_links_set(struct bonding *bond,
1125 struct bond_opt_value *newval)
1127 pr_info("%s: Setting min links value to %llu\n",
1128 bond->dev->name, newval->value);
1129 bond->params.min_links = newval->value;
1134 int bond_option_lp_interval_set(struct bonding *bond,
1135 struct bond_opt_value *newval)
1137 bond->params.lp_interval = newval->value;
1142 int bond_option_pps_set(struct bonding *bond, struct bond_opt_value *newval)
1144 bond->params.packets_per_slave = newval->value;
1145 if (newval->value > 0) {
1146 bond->params.reciprocal_packets_per_slave =
1147 reciprocal_value(newval->value);
1149 /* reciprocal_packets_per_slave is unused if
1150 * packets_per_slave is 0 or 1, just initialize it
1152 bond->params.reciprocal_packets_per_slave =
1153 (struct reciprocal_value) { 0 };
1159 int bond_option_lacp_rate_set(struct bonding *bond,
1160 struct bond_opt_value *newval)
1162 pr_info("%s: Setting LACP rate to %s (%llu).\n",
1163 bond->dev->name, newval->string, newval->value);
1164 bond->params.lacp_fast = newval->value;
1165 bond_3ad_update_lacp_rate(bond);
1170 int bond_option_ad_select_set(struct bonding *bond,
1171 struct bond_opt_value *newval)
1173 pr_info("%s: Setting ad_select to %s (%llu).\n",
1174 bond->dev->name, newval->string, newval->value);
1175 bond->params.ad_select = newval->value;
1180 int bond_option_queue_id_set(struct bonding *bond,
1181 struct bond_opt_value *newval)
1183 struct slave *slave, *update_slave;
1184 struct net_device *sdev;
1185 struct list_head *iter;
1190 /* delim will point to queue id if successful */
1191 delim = strchr(newval->string, ':');
1195 /* Terminate string that points to device name and bump it
1196 * up one, so we can read the queue id there.
1199 if (sscanf(++delim, "%hd\n", &qid) != 1)
1202 /* Check buffer length, valid ifname and queue id */
1203 if (strlen(newval->string) > IFNAMSIZ ||
1204 !dev_valid_name(newval->string) ||
1205 qid > bond->dev->real_num_tx_queues)
1208 /* Get the pointer to that interface if it exists */
1209 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1213 /* Search for thes slave and check for duplicate qids */
1214 update_slave = NULL;
1215 bond_for_each_slave(bond, slave, iter) {
1216 if (sdev == slave->dev)
1217 /* We don't need to check the matching
1218 * slave for dups, since we're overwriting it
1220 update_slave = slave;
1221 else if (qid && qid == slave->queue_id) {
1229 /* Actually set the qids for the slave */
1230 update_slave->queue_id = qid;
1236 pr_info("invalid input for queue_id set for %s.\n",
1243 int bond_option_slaves_set(struct bonding *bond, struct bond_opt_value *newval)
1245 char command[IFNAMSIZ + 1] = { 0, };
1246 struct net_device *dev;
1250 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1251 ifname = command + 1;
1252 if ((strlen(command) <= 1) ||
1253 !dev_valid_name(ifname))
1256 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1258 pr_info("%s: Interface %s does not exist!\n",
1259 bond->dev->name, ifname);
1264 switch (command[0]) {
1266 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
1267 ret = bond_enslave(bond->dev, dev);
1271 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
1272 ret = bond_release(bond->dev, dev);
1283 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",