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 int bond_option_active_slave_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25 static int bond_option_miimon_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27 static int bond_option_updelay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29 static int bond_option_downdelay_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31 static int bond_option_use_carrier_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33 static int bond_option_arp_interval_set(struct bonding *bond,
34 const struct bond_opt_value *newval);
35 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
36 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
37 static int bond_option_arp_ip_targets_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39 static int bond_option_arp_validate_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41 static int bond_option_arp_all_targets_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43 static int bond_option_primary_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45 static int bond_option_primary_reselect_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47 static int bond_option_fail_over_mac_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51 static int bond_option_resend_igmp_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53 static int bond_option_num_peer_notif_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55 static int bond_option_all_slaves_active_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57 static int bond_option_min_links_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59 static int bond_option_lp_interval_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61 static int bond_option_pps_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63 static int bond_option_lacp_rate_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65 static int bond_option_ad_select_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67 static int bond_option_queue_id_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69 static int bond_option_mode_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71 static int bond_option_slaves_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
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_option bond_opts[] = {
187 .desc = "bond device mode",
188 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
189 .values = bond_mode_tbl,
190 .set = bond_option_mode_set
192 [BOND_OPT_PACKETS_PER_SLAVE] = {
193 .id = BOND_OPT_PACKETS_PER_SLAVE,
194 .name = "packets_per_slave",
195 .desc = "Packets to send per slave in RR mode",
196 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
197 .values = bond_pps_tbl,
198 .set = bond_option_pps_set
200 [BOND_OPT_XMIT_HASH] = {
201 .id = BOND_OPT_XMIT_HASH,
202 .name = "xmit_hash_policy",
203 .desc = "balance-xor and 802.3ad hashing method",
204 .values = bond_xmit_hashtype_tbl,
205 .set = bond_option_xmit_hash_policy_set
207 [BOND_OPT_ARP_VALIDATE] = {
208 .id = BOND_OPT_ARP_VALIDATE,
209 .name = "arp_validate",
210 .desc = "validate src/dst of ARP probes",
211 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
213 .values = bond_arp_validate_tbl,
214 .set = bond_option_arp_validate_set
216 [BOND_OPT_ARP_ALL_TARGETS] = {
217 .id = BOND_OPT_ARP_ALL_TARGETS,
218 .name = "arp_all_targets",
219 .desc = "fail on any/all arp targets timeout",
220 .values = bond_arp_all_targets_tbl,
221 .set = bond_option_arp_all_targets_set
223 [BOND_OPT_FAIL_OVER_MAC] = {
224 .id = BOND_OPT_FAIL_OVER_MAC,
225 .name = "fail_over_mac",
226 .desc = "For active-backup, do not set all slaves to the same MAC",
227 .flags = BOND_OPTFLAG_NOSLAVES,
228 .values = bond_fail_over_mac_tbl,
229 .set = bond_option_fail_over_mac_set
231 [BOND_OPT_ARP_INTERVAL] = {
232 .id = BOND_OPT_ARP_INTERVAL,
233 .name = "arp_interval",
234 .desc = "arp interval in milliseconds",
235 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
237 .values = bond_intmax_tbl,
238 .set = bond_option_arp_interval_set
240 [BOND_OPT_ARP_TARGETS] = {
241 .id = BOND_OPT_ARP_TARGETS,
242 .name = "arp_ip_target",
243 .desc = "arp targets in n.n.n.n form",
244 .flags = BOND_OPTFLAG_RAWVAL,
245 .set = bond_option_arp_ip_targets_set
247 [BOND_OPT_DOWNDELAY] = {
248 .id = BOND_OPT_DOWNDELAY,
250 .desc = "Delay before considering link down, in milliseconds",
251 .values = bond_intmax_tbl,
252 .set = bond_option_downdelay_set
254 [BOND_OPT_UPDELAY] = {
255 .id = BOND_OPT_UPDELAY,
257 .desc = "Delay before considering link up, in milliseconds",
258 .values = bond_intmax_tbl,
259 .set = bond_option_updelay_set
261 [BOND_OPT_LACP_RATE] = {
262 .id = BOND_OPT_LACP_RATE,
264 .desc = "LACPDU tx rate to request from 802.3ad partner",
265 .flags = BOND_OPTFLAG_IFDOWN,
266 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
267 .values = bond_lacp_rate_tbl,
268 .set = bond_option_lacp_rate_set
270 [BOND_OPT_MINLINKS] = {
271 .id = BOND_OPT_MINLINKS,
273 .desc = "Minimum number of available links before turning on carrier",
274 .values = bond_intmax_tbl,
275 .set = bond_option_min_links_set
277 [BOND_OPT_AD_SELECT] = {
278 .id = BOND_OPT_AD_SELECT,
280 .desc = "803.ad aggregation selection logic",
281 .flags = BOND_OPTFLAG_IFDOWN,
282 .values = bond_ad_select_tbl,
283 .set = bond_option_ad_select_set
285 [BOND_OPT_NUM_PEER_NOTIF] = {
286 .id = BOND_OPT_NUM_PEER_NOTIF,
287 .name = "num_unsol_na",
288 .desc = "Number of peer notifications to send on failover event",
289 .values = bond_num_peer_notif_tbl,
290 .set = bond_option_num_peer_notif_set
292 [BOND_OPT_MIIMON] = {
293 .id = BOND_OPT_MIIMON,
295 .desc = "Link check interval in milliseconds",
296 .values = bond_intmax_tbl,
297 .set = bond_option_miimon_set
299 [BOND_OPT_PRIMARY] = {
300 .id = BOND_OPT_PRIMARY,
302 .desc = "Primary network device to use",
303 .flags = BOND_OPTFLAG_RAWVAL,
304 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
307 .set = bond_option_primary_set
309 [BOND_OPT_PRIMARY_RESELECT] = {
310 .id = BOND_OPT_PRIMARY_RESELECT,
311 .name = "primary_reselect",
312 .desc = "Reselect primary slave once it comes up",
313 .values = bond_primary_reselect_tbl,
314 .set = bond_option_primary_reselect_set
316 [BOND_OPT_USE_CARRIER] = {
317 .id = BOND_OPT_USE_CARRIER,
318 .name = "use_carrier",
319 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
320 .values = bond_use_carrier_tbl,
321 .set = bond_option_use_carrier_set
323 [BOND_OPT_ACTIVE_SLAVE] = {
324 .id = BOND_OPT_ACTIVE_SLAVE,
325 .name = "active_slave",
326 .desc = "Currently active slave",
327 .flags = BOND_OPTFLAG_RAWVAL,
328 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
331 .set = bond_option_active_slave_set
333 [BOND_OPT_QUEUE_ID] = {
334 .id = BOND_OPT_QUEUE_ID,
336 .desc = "Set queue id of a slave",
337 .flags = BOND_OPTFLAG_RAWVAL,
338 .set = bond_option_queue_id_set
340 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
341 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
342 .name = "all_slaves_active",
343 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
344 .values = bond_all_slaves_active_tbl,
345 .set = bond_option_all_slaves_active_set
347 [BOND_OPT_RESEND_IGMP] = {
348 .id = BOND_OPT_RESEND_IGMP,
349 .name = "resend_igmp",
350 .desc = "Number of IGMP membership reports to send on link failure",
351 .values = bond_resend_igmp_tbl,
352 .set = bond_option_resend_igmp_set
354 [BOND_OPT_LP_INTERVAL] = {
355 .id = BOND_OPT_LP_INTERVAL,
356 .name = "lp_interval",
357 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
358 .values = bond_lp_interval_tbl,
359 .set = bond_option_lp_interval_set
361 [BOND_OPT_SLAVES] = {
362 .id = BOND_OPT_SLAVES,
364 .desc = "Slave membership management",
365 .flags = BOND_OPTFLAG_RAWVAL,
366 .set = bond_option_slaves_set
371 /* Searches for a value in opt's values[] table */
372 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
374 const struct bond_option *opt;
377 opt = bond_opt_get(option);
380 for (i = 0; opt->values && opt->values[i].string; i++)
381 if (opt->values[i].value == val)
382 return &opt->values[i];
387 /* Searches for a value in opt's values[] table which matches the flagmask */
388 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
393 for (i = 0; opt->values && opt->values[i].string; i++)
394 if (opt->values[i].flags & flagmask)
395 return &opt->values[i];
400 /* If maxval is missing then there's no range to check. In case minval is
401 * missing then it's considered to be 0.
403 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
405 const struct bond_opt_value *minval, *maxval;
407 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
408 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
409 if (!maxval || (minval && val < minval->value) || val > maxval->value)
416 * bond_opt_parse - parse option value
417 * @opt: the option to parse against
418 * @val: value to parse
420 * This function tries to extract the value from @val and check if it's
421 * a possible match for the option and returns NULL if a match isn't found,
422 * or the struct_opt_value that matched. It also strips the new line from
423 * @val->string if it's present.
425 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
426 struct bond_opt_value *val)
428 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
429 const struct bond_opt_value *tbl;
430 const struct bond_opt_value *ret = NULL;
434 /* No parsing if the option wants a raw val */
435 if (opt->flags & BOND_OPTFLAG_RAWVAL)
442 /* ULLONG_MAX is used to bypass string processing */
443 checkval = val->value != ULLONG_MAX;
447 p = strchr(val->string, '\n');
450 for (p = val->string; *p; p++)
451 if (!(isdigit(*p) || isspace(*p)))
453 /* The following code extracts the string to match or the value
454 * and sets checkval appropriately
457 rv = sscanf(val->string, "%32s", valstr);
459 rv = sscanf(val->string, "%llu", &val->value);
466 for (i = 0; tbl[i].string; i++) {
467 /* Check for exact match */
469 if (val->value == tbl[i].value)
472 if (!strcmp(valstr, "default") &&
473 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
476 if (!strcmp(valstr, tbl[i].string))
479 /* Found an exact match */
483 /* Possible range match */
484 if (checkval && bond_opt_check_range(opt, val->value))
490 /* Check opt's dependencies against bond mode and currently set options */
491 static int bond_opt_check_deps(struct bonding *bond,
492 const struct bond_option *opt)
494 struct bond_params *params = &bond->params;
496 if (test_bit(params->mode, &opt->unsuppmodes))
498 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
500 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
506 static void bond_opt_dep_print(struct bonding *bond,
507 const struct bond_option *opt)
509 const struct bond_opt_value *modeval;
510 struct bond_params *params;
512 params = &bond->params;
513 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
514 if (test_bit(params->mode, &opt->unsuppmodes))
515 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n",
516 bond->dev->name, opt->name,
517 modeval->string, modeval->value);
520 static void bond_opt_error_interpret(struct bonding *bond,
521 const struct bond_option *opt,
522 int error, const struct bond_opt_value *val)
524 const struct bond_opt_value *minval, *maxval;
531 /* sometimes RAWVAL opts may have new lines */
532 p = strchr(val->string, '\n');
535 pr_err("%s: option %s: invalid value (%s)\n",
536 bond->dev->name, opt->name, val->string);
538 pr_err("%s: option %s: invalid value (%llu)\n",
539 bond->dev->name, opt->name, val->value);
542 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
543 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
546 pr_err("%s: option %s: allowed values %llu - %llu\n",
547 bond->dev->name, opt->name, minval ? minval->value : 0,
551 bond_opt_dep_print(bond, opt);
554 pr_err("%s: option %s: unable to set because the bond device has slaves\n",
555 bond->dev->name, opt->name);
558 pr_err("%s: option %s: unable to set because the bond device is up\n",
559 bond->dev->name, opt->name);
567 * __bond_opt_set - set a bonding option
568 * @bond: target bond device
569 * @option: option to set
570 * @val: value to set it to
572 * This function is used to change the bond's option value, it can be
573 * used for both enabling/changing an option and for disabling it. RTNL lock
574 * must be obtained before calling this function.
576 int __bond_opt_set(struct bonding *bond,
577 unsigned int option, struct bond_opt_value *val)
579 const struct bond_opt_value *retval = NULL;
580 const struct bond_option *opt;
585 opt = bond_opt_get(option);
586 if (WARN_ON(!val) || WARN_ON(!opt))
588 ret = bond_opt_check_deps(bond, opt);
591 retval = bond_opt_parse(opt, val);
596 ret = opt->set(bond, retval);
599 bond_opt_error_interpret(bond, opt, ret, val);
605 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
606 * @bond: target bond device
607 * @option: option to set
608 * @buf: value to set it to
610 * This function tries to acquire RTNL without blocking and if successful
611 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
613 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
615 struct bond_opt_value optval;
619 return restart_syscall();
620 bond_opt_initstr(&optval, buf);
621 ret = __bond_opt_set(bond, option, &optval);
628 * bond_opt_get - get a pointer to an option
629 * @option: option for which to return a pointer
631 * This function checks if option is valid and if so returns a pointer
632 * to its entry in the bond_opts[] option array.
634 const struct bond_option *bond_opt_get(unsigned int option)
636 if (!BOND_OPT_VALID(option))
639 return &bond_opts[option];
642 int bond_option_mode_set(struct bonding *bond, const struct bond_opt_value *newval)
644 if (BOND_NO_USES_ARP(newval->value) && bond->params.arp_interval) {
645 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
646 bond->dev->name, newval->string);
647 /* disable arp monitoring */
648 bond->params.arp_interval = 0;
649 /* set miimon to default value */
650 bond->params.miimon = BOND_DEFAULT_MIIMON;
651 pr_info("%s: Setting MII monitoring interval to %d\n",
652 bond->dev->name, bond->params.miimon);
655 /* don't cache arp_validate between modes */
656 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
657 bond->params.mode = newval->value;
662 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
665 return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL;
668 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
670 struct slave *slave = rcu_dereference(bond->curr_active_slave);
672 return __bond_option_active_slave_get(bond, slave);
675 struct net_device *bond_option_active_slave_get(struct bonding *bond)
677 return __bond_option_active_slave_get(bond, bond->curr_active_slave);
680 static int bond_option_active_slave_set(struct bonding *bond,
681 const struct bond_opt_value *newval)
683 char ifname[IFNAMSIZ] = { 0, };
684 struct net_device *slave_dev;
687 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
688 if (!strlen(ifname) || newval->string[0] == '\n') {
691 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
697 if (!netif_is_bond_slave(slave_dev)) {
698 pr_err("Device %s is not bonding slave\n",
703 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
704 pr_err("%s: Device %s is not our slave\n",
705 bond->dev->name, slave_dev->name);
711 write_lock_bh(&bond->curr_slave_lock);
713 /* check to see if we are clearing active */
715 pr_info("%s: Clearing current active slave\n", bond->dev->name);
716 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
717 bond_select_active_slave(bond);
719 struct slave *old_active = bond->curr_active_slave;
720 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
724 if (new_active == old_active) {
726 pr_info("%s: %s is already the current active slave\n",
727 bond->dev->name, new_active->dev->name);
729 if (old_active && (new_active->link == BOND_LINK_UP) &&
730 IS_UP(new_active->dev)) {
731 pr_info("%s: Setting %s as active slave\n",
732 bond->dev->name, new_active->dev->name);
733 bond_change_active_slave(bond, new_active);
735 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down\n",
736 bond->dev->name, new_active->dev->name,
737 new_active->dev->name);
743 write_unlock_bh(&bond->curr_slave_lock);
744 unblock_netpoll_tx();
749 static int bond_option_miimon_set(struct bonding *bond,
750 const struct bond_opt_value *newval)
752 pr_info("%s: Setting MII monitoring interval to %llu\n",
753 bond->dev->name, newval->value);
754 bond->params.miimon = newval->value;
755 if (bond->params.updelay)
756 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
758 bond->params.updelay * bond->params.miimon);
759 if (bond->params.downdelay)
760 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
762 bond->params.downdelay * bond->params.miimon);
763 if (newval->value && bond->params.arp_interval) {
764 pr_info("%s: MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n",
766 bond->params.arp_interval = 0;
767 if (bond->params.arp_validate)
768 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
770 if (bond->dev->flags & IFF_UP) {
771 /* If the interface is up, we may need to fire off
772 * the MII timer. If the interface is down, the
773 * timer will get fired off when the open function
776 if (!newval->value) {
777 cancel_delayed_work_sync(&bond->mii_work);
779 cancel_delayed_work_sync(&bond->arp_work);
780 queue_delayed_work(bond->wq, &bond->mii_work, 0);
787 static int bond_option_updelay_set(struct bonding *bond,
788 const struct bond_opt_value *newval)
790 int value = newval->value;
792 if (!bond->params.miimon) {
793 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
797 if ((value % bond->params.miimon) != 0) {
798 pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
799 bond->dev->name, value,
801 (value / bond->params.miimon) *
802 bond->params.miimon);
804 bond->params.updelay = value / bond->params.miimon;
805 pr_info("%s: Setting up delay to %d\n",
806 bond->dev->name, bond->params.updelay * bond->params.miimon);
811 static int bond_option_downdelay_set(struct bonding *bond,
812 const struct bond_opt_value *newval)
814 int value = newval->value;
816 if (!bond->params.miimon) {
817 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
821 if ((value % bond->params.miimon) != 0) {
822 pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
823 bond->dev->name, value,
825 (value / bond->params.miimon) *
826 bond->params.miimon);
828 bond->params.downdelay = value / bond->params.miimon;
829 pr_info("%s: Setting down delay to %d\n",
830 bond->dev->name, bond->params.downdelay * bond->params.miimon);
835 static int bond_option_use_carrier_set(struct bonding *bond,
836 const struct bond_opt_value *newval)
838 pr_info("%s: Setting use_carrier to %llu\n",
839 bond->dev->name, newval->value);
840 bond->params.use_carrier = newval->value;
845 static int bond_option_arp_interval_set(struct bonding *bond,
846 const struct bond_opt_value *newval)
848 pr_info("%s: Setting ARP monitoring interval to %llu\n",
849 bond->dev->name, newval->value);
850 bond->params.arp_interval = newval->value;
852 if (bond->params.miimon) {
853 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring\n",
854 bond->dev->name, bond->dev->name);
855 bond->params.miimon = 0;
857 if (!bond->params.arp_targets[0])
858 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified\n",
861 if (bond->dev->flags & IFF_UP) {
862 /* If the interface is up, we may need to fire off
863 * the ARP timer. If the interface is down, the
864 * timer will get fired off when the open function
867 if (!newval->value) {
868 if (bond->params.arp_validate)
869 bond->recv_probe = NULL;
870 cancel_delayed_work_sync(&bond->arp_work);
872 /* arp_validate can be set only in active-backup mode */
873 bond->recv_probe = bond_arp_rcv;
874 cancel_delayed_work_sync(&bond->mii_work);
875 queue_delayed_work(bond->wq, &bond->arp_work, 0);
882 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
884 unsigned long last_rx)
886 __be32 *targets = bond->params.arp_targets;
887 struct list_head *iter;
890 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
891 bond_for_each_slave(bond, slave, iter)
892 slave->target_last_arp_rx[slot] = last_rx;
893 targets[slot] = target;
897 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
899 __be32 *targets = bond->params.arp_targets;
902 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
903 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
904 bond->dev->name, &target);
908 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
909 pr_err("%s: ARP target %pI4 is already present\n",
910 bond->dev->name, &target);
914 ind = bond_get_targets_ip(targets, 0); /* first free slot */
916 pr_err("%s: ARP target table is full!\n", bond->dev->name);
920 pr_info("%s: Adding ARP target %pI4\n", bond->dev->name, &target);
922 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
927 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
931 /* not to race with bond_arp_rcv */
932 write_lock_bh(&bond->lock);
933 ret = _bond_option_arp_ip_target_add(bond, target);
934 write_unlock_bh(&bond->lock);
939 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
941 __be32 *targets = bond->params.arp_targets;
942 struct list_head *iter;
944 unsigned long *targets_rx;
947 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
948 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
949 bond->dev->name, &target);
953 ind = bond_get_targets_ip(targets, target);
955 pr_err("%s: unable to remove nonexistent ARP target %pI4\n",
956 bond->dev->name, &target);
960 if (ind == 0 && !targets[1] && bond->params.arp_interval)
961 pr_warn("%s: Removing last arp target with arp_interval on\n",
964 pr_info("%s: Removing ARP target %pI4\n", bond->dev->name, &target);
966 /* not to race with bond_arp_rcv */
967 write_lock_bh(&bond->lock);
969 bond_for_each_slave(bond, slave, iter) {
970 targets_rx = slave->target_last_arp_rx;
971 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
972 targets_rx[i] = targets_rx[i+1];
975 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
976 targets[i] = targets[i+1];
979 write_unlock_bh(&bond->lock);
984 void bond_option_arp_ip_targets_clear(struct bonding *bond)
988 /* not to race with bond_arp_rcv */
989 write_lock_bh(&bond->lock);
990 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
991 _bond_options_arp_ip_target_set(bond, i, 0, 0);
992 write_unlock_bh(&bond->lock);
995 static int bond_option_arp_ip_targets_set(struct bonding *bond,
996 const struct bond_opt_value *newval)
1001 if (newval->string) {
1002 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1003 pr_err("%s: invalid ARP target %pI4 specified\n",
1004 bond->dev->name, &target);
1007 if (newval->string[0] == '+')
1008 ret = bond_option_arp_ip_target_add(bond, target);
1009 else if (newval->string[0] == '-')
1010 ret = bond_option_arp_ip_target_rem(bond, target);
1012 pr_err("no command found in arp_ip_targets file for bond %s - use +<addr> or -<addr>\n",
1015 target = newval->value;
1016 ret = bond_option_arp_ip_target_add(bond, target);
1022 static int bond_option_arp_validate_set(struct bonding *bond,
1023 const struct bond_opt_value *newval)
1025 pr_info("%s: Setting arp_validate to %s (%llu)\n",
1026 bond->dev->name, newval->string, newval->value);
1028 if (bond->dev->flags & IFF_UP) {
1030 bond->recv_probe = NULL;
1031 else if (bond->params.arp_interval)
1032 bond->recv_probe = bond_arp_rcv;
1034 bond->params.arp_validate = newval->value;
1039 static int bond_option_arp_all_targets_set(struct bonding *bond,
1040 const struct bond_opt_value *newval)
1042 pr_info("%s: Setting arp_all_targets to %s (%llu)\n",
1043 bond->dev->name, newval->string, newval->value);
1044 bond->params.arp_all_targets = newval->value;
1049 static int bond_option_primary_set(struct bonding *bond,
1050 const struct bond_opt_value *newval)
1052 char *p, *primary = newval->string;
1053 struct list_head *iter;
1054 struct slave *slave;
1057 read_lock(&bond->lock);
1058 write_lock_bh(&bond->curr_slave_lock);
1060 p = strchr(primary, '\n');
1063 /* check to see if we are clearing primary */
1064 if (!strlen(primary)) {
1065 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1066 bond->primary_slave = NULL;
1067 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1068 bond_select_active_slave(bond);
1072 bond_for_each_slave(bond, slave, iter) {
1073 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1074 pr_info("%s: Setting %s as primary slave\n",
1075 bond->dev->name, slave->dev->name);
1076 bond->primary_slave = slave;
1077 strcpy(bond->params.primary, slave->dev->name);
1078 bond_select_active_slave(bond);
1083 if (bond->primary_slave) {
1084 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1085 bond->primary_slave = NULL;
1086 bond_select_active_slave(bond);
1088 strncpy(bond->params.primary, primary, IFNAMSIZ);
1089 bond->params.primary[IFNAMSIZ - 1] = 0;
1091 pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet\n",
1092 bond->dev->name, primary, bond->dev->name);
1095 write_unlock_bh(&bond->curr_slave_lock);
1096 read_unlock(&bond->lock);
1097 unblock_netpoll_tx();
1102 static int bond_option_primary_reselect_set(struct bonding *bond,
1103 const struct bond_opt_value *newval)
1105 pr_info("%s: Setting primary_reselect to %s (%llu)\n",
1106 bond->dev->name, newval->string, newval->value);
1107 bond->params.primary_reselect = newval->value;
1110 write_lock_bh(&bond->curr_slave_lock);
1111 bond_select_active_slave(bond);
1112 write_unlock_bh(&bond->curr_slave_lock);
1113 unblock_netpoll_tx();
1118 static int bond_option_fail_over_mac_set(struct bonding *bond,
1119 const struct bond_opt_value *newval)
1121 pr_info("%s: Setting fail_over_mac to %s (%llu)\n",
1122 bond->dev->name, newval->string, newval->value);
1123 bond->params.fail_over_mac = newval->value;
1128 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1129 const struct bond_opt_value *newval)
1131 pr_info("%s: Setting xmit hash policy to %s (%llu)\n",
1132 bond->dev->name, newval->string, newval->value);
1133 bond->params.xmit_policy = newval->value;
1138 static int bond_option_resend_igmp_set(struct bonding *bond,
1139 const struct bond_opt_value *newval)
1141 pr_info("%s: Setting resend_igmp to %llu\n",
1142 bond->dev->name, newval->value);
1143 bond->params.resend_igmp = newval->value;
1148 static int bond_option_num_peer_notif_set(struct bonding *bond,
1149 const struct bond_opt_value *newval)
1151 bond->params.num_peer_notif = newval->value;
1156 static int bond_option_all_slaves_active_set(struct bonding *bond,
1157 const struct bond_opt_value *newval)
1159 struct list_head *iter;
1160 struct slave *slave;
1162 if (newval->value == bond->params.all_slaves_active)
1164 bond->params.all_slaves_active = newval->value;
1165 bond_for_each_slave(bond, slave, iter) {
1166 if (!bond_is_active_slave(slave)) {
1168 slave->inactive = 0;
1170 slave->inactive = 1;
1177 static int bond_option_min_links_set(struct bonding *bond,
1178 const struct bond_opt_value *newval)
1180 pr_info("%s: Setting min links value to %llu\n",
1181 bond->dev->name, newval->value);
1182 bond->params.min_links = newval->value;
1187 static int bond_option_lp_interval_set(struct bonding *bond,
1188 const struct bond_opt_value *newval)
1190 bond->params.lp_interval = newval->value;
1195 static int bond_option_pps_set(struct bonding *bond,
1196 const struct bond_opt_value *newval)
1198 bond->params.packets_per_slave = newval->value;
1199 if (newval->value > 0) {
1200 bond->params.reciprocal_packets_per_slave =
1201 reciprocal_value(newval->value);
1203 /* reciprocal_packets_per_slave is unused if
1204 * packets_per_slave is 0 or 1, just initialize it
1206 bond->params.reciprocal_packets_per_slave =
1207 (struct reciprocal_value) { 0 };
1213 static int bond_option_lacp_rate_set(struct bonding *bond,
1214 const struct bond_opt_value *newval)
1216 pr_info("%s: Setting LACP rate to %s (%llu)\n",
1217 bond->dev->name, newval->string, newval->value);
1218 bond->params.lacp_fast = newval->value;
1219 bond_3ad_update_lacp_rate(bond);
1224 static int bond_option_ad_select_set(struct bonding *bond,
1225 const struct bond_opt_value *newval)
1227 pr_info("%s: Setting ad_select to %s (%llu)\n",
1228 bond->dev->name, newval->string, newval->value);
1229 bond->params.ad_select = newval->value;
1234 static int bond_option_queue_id_set(struct bonding *bond,
1235 const struct bond_opt_value *newval)
1237 struct slave *slave, *update_slave;
1238 struct net_device *sdev;
1239 struct list_head *iter;
1244 /* delim will point to queue id if successful */
1245 delim = strchr(newval->string, ':');
1249 /* Terminate string that points to device name and bump it
1250 * up one, so we can read the queue id there.
1253 if (sscanf(++delim, "%hd\n", &qid) != 1)
1256 /* Check buffer length, valid ifname and queue id */
1257 if (!dev_valid_name(newval->string) ||
1258 qid > bond->dev->real_num_tx_queues)
1261 /* Get the pointer to that interface if it exists */
1262 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1266 /* Search for thes slave and check for duplicate qids */
1267 update_slave = NULL;
1268 bond_for_each_slave(bond, slave, iter) {
1269 if (sdev == slave->dev)
1270 /* We don't need to check the matching
1271 * slave for dups, since we're overwriting it
1273 update_slave = slave;
1274 else if (qid && qid == slave->queue_id) {
1282 /* Actually set the qids for the slave */
1283 update_slave->queue_id = qid;
1289 pr_info("invalid input for queue_id set for %s\n", bond->dev->name);
1295 static int bond_option_slaves_set(struct bonding *bond,
1296 const struct bond_opt_value *newval)
1298 char command[IFNAMSIZ + 1] = { 0, };
1299 struct net_device *dev;
1303 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1304 ifname = command + 1;
1305 if ((strlen(command) <= 1) ||
1306 !dev_valid_name(ifname))
1309 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1311 pr_info("%s: interface %s does not exist!\n",
1312 bond->dev->name, ifname);
1317 switch (command[0]) {
1319 pr_info("%s: Adding slave %s\n", bond->dev->name, dev->name);
1320 ret = bond_enslave(bond->dev, dev);
1324 pr_info("%s: Removing slave %s\n", bond->dev->name, dev->name);
1325 ret = bond_release(bond->dev, dev);
1336 pr_err("no command found in slaves file for bond %s - use +ifname or -ifname\n",