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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * drivers/net/bond/bond_options.c - bonding options4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>5 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>6 */7 8#include <linux/errno.h>9#include <linux/if.h>10#include <linux/netdevice.h>11#include <linux/spinlock.h>12#include <linux/rcupdate.h>13#include <linux/ctype.h>14#include <linux/inet.h>15#include <linux/sched/signal.h>16 17#include <net/bonding.h>18#include <net/ndisc.h>19 20static int bond_option_active_slave_set(struct bonding *bond,21 const struct bond_opt_value *newval);22static int bond_option_miimon_set(struct bonding *bond,23 const struct bond_opt_value *newval);24static int bond_option_updelay_set(struct bonding *bond,25 const struct bond_opt_value *newval);26static int bond_option_downdelay_set(struct bonding *bond,27 const struct bond_opt_value *newval);28static int bond_option_peer_notif_delay_set(struct bonding *bond,29 const struct bond_opt_value *newval);30static int bond_option_use_carrier_set(struct bonding *bond,31 const struct bond_opt_value *newval);32static int bond_option_arp_interval_set(struct bonding *bond,33 const struct bond_opt_value *newval);34static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);35static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);36static int bond_option_arp_ip_targets_set(struct bonding *bond,37 const struct bond_opt_value *newval);38static int bond_option_ns_ip6_targets_set(struct bonding *bond,39 const struct bond_opt_value *newval);40static int bond_option_arp_validate_set(struct bonding *bond,41 const struct bond_opt_value *newval);42static int bond_option_arp_all_targets_set(struct bonding *bond,43 const struct bond_opt_value *newval);44static int bond_option_prio_set(struct bonding *bond,45 const struct bond_opt_value *newval);46static int bond_option_primary_set(struct bonding *bond,47 const struct bond_opt_value *newval);48static int bond_option_primary_reselect_set(struct bonding *bond,49 const struct bond_opt_value *newval);50static int bond_option_fail_over_mac_set(struct bonding *bond,51 const struct bond_opt_value *newval);52static int bond_option_xmit_hash_policy_set(struct bonding *bond,53 const struct bond_opt_value *newval);54static int bond_option_resend_igmp_set(struct bonding *bond,55 const struct bond_opt_value *newval);56static int bond_option_num_peer_notif_set(struct bonding *bond,57 const struct bond_opt_value *newval);58static int bond_option_all_slaves_active_set(struct bonding *bond,59 const struct bond_opt_value *newval);60static int bond_option_min_links_set(struct bonding *bond,61 const struct bond_opt_value *newval);62static int bond_option_lp_interval_set(struct bonding *bond,63 const struct bond_opt_value *newval);64static int bond_option_pps_set(struct bonding *bond,65 const struct bond_opt_value *newval);66static int bond_option_lacp_active_set(struct bonding *bond,67 const struct bond_opt_value *newval);68static int bond_option_lacp_rate_set(struct bonding *bond,69 const struct bond_opt_value *newval);70static int bond_option_ad_select_set(struct bonding *bond,71 const struct bond_opt_value *newval);72static int bond_option_queue_id_set(struct bonding *bond,73 const struct bond_opt_value *newval);74static int bond_option_mode_set(struct bonding *bond,75 const struct bond_opt_value *newval);76static int bond_option_slaves_set(struct bonding *bond,77 const struct bond_opt_value *newval);78static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,79 const struct bond_opt_value *newval);80static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,81 const struct bond_opt_value *newval);82static int bond_option_ad_actor_system_set(struct bonding *bond,83 const struct bond_opt_value *newval);84static int bond_option_ad_user_port_key_set(struct bonding *bond,85 const struct bond_opt_value *newval);86static int bond_option_missed_max_set(struct bonding *bond,87 const struct bond_opt_value *newval);88static int bond_option_coupled_control_set(struct bonding *bond,89 const struct bond_opt_value *newval);90 91static const struct bond_opt_value bond_mode_tbl[] = {92 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},93 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},94 { "balance-xor", BOND_MODE_XOR, 0},95 { "broadcast", BOND_MODE_BROADCAST, 0},96 { "802.3ad", BOND_MODE_8023AD, 0},97 { "balance-tlb", BOND_MODE_TLB, 0},98 { "balance-alb", BOND_MODE_ALB, 0},99 { NULL, -1, 0},100};101 102static const struct bond_opt_value bond_pps_tbl[] = {103 { "default", 1, BOND_VALFLAG_DEFAULT},104 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},105 { NULL, -1, 0},106};107 108static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {109 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},110 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},111 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},112 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},113 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},114 { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},115 { NULL, -1, 0},116};117 118static const struct bond_opt_value bond_arp_validate_tbl[] = {119 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},120 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},121 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},122 { "all", BOND_ARP_VALIDATE_ALL, 0},123 { "filter", BOND_ARP_FILTER, 0},124 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},125 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},126 { NULL, -1, 0},127};128 129static const struct bond_opt_value bond_arp_all_targets_tbl[] = {130 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},131 { "all", BOND_ARP_TARGETS_ALL, 0},132 { NULL, -1, 0},133};134 135static const struct bond_opt_value bond_fail_over_mac_tbl[] = {136 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},137 { "active", BOND_FOM_ACTIVE, 0},138 { "follow", BOND_FOM_FOLLOW, 0},139 { NULL, -1, 0},140};141 142static const struct bond_opt_value bond_intmax_tbl[] = {143 { "off", 0, BOND_VALFLAG_DEFAULT},144 { "maxval", INT_MAX, BOND_VALFLAG_MAX},145 { NULL, -1, 0}146};147 148static const struct bond_opt_value bond_lacp_active[] = {149 { "off", 0, 0},150 { "on", 1, BOND_VALFLAG_DEFAULT},151 { NULL, -1, 0}152};153 154static const struct bond_opt_value bond_lacp_rate_tbl[] = {155 { "slow", AD_LACP_SLOW, 0},156 { "fast", AD_LACP_FAST, 0},157 { NULL, -1, 0},158};159 160static const struct bond_opt_value bond_ad_select_tbl[] = {161 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},162 { "bandwidth", BOND_AD_BANDWIDTH, 0},163 { "count", BOND_AD_COUNT, 0},164 { NULL, -1, 0},165};166 167static const struct bond_opt_value bond_num_peer_notif_tbl[] = {168 { "off", 0, 0},169 { "maxval", 255, BOND_VALFLAG_MAX},170 { "default", 1, BOND_VALFLAG_DEFAULT},171 { NULL, -1, 0}172};173 174static const struct bond_opt_value bond_peer_notif_delay_tbl[] = {175 { "off", 0, 0},176 { "maxval", 300000, BOND_VALFLAG_MAX},177 { NULL, -1, 0}178};179 180static const struct bond_opt_value bond_primary_reselect_tbl[] = {181 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},182 { "better", BOND_PRI_RESELECT_BETTER, 0},183 { "failure", BOND_PRI_RESELECT_FAILURE, 0},184 { NULL, -1},185};186 187static const struct bond_opt_value bond_use_carrier_tbl[] = {188 { "off", 0, 0},189 { "on", 1, BOND_VALFLAG_DEFAULT},190 { NULL, -1, 0}191};192 193static const struct bond_opt_value bond_all_slaves_active_tbl[] = {194 { "off", 0, BOND_VALFLAG_DEFAULT},195 { "on", 1, 0},196 { NULL, -1, 0}197};198 199static const struct bond_opt_value bond_resend_igmp_tbl[] = {200 { "off", 0, 0},201 { "maxval", 255, BOND_VALFLAG_MAX},202 { "default", 1, BOND_VALFLAG_DEFAULT},203 { NULL, -1, 0}204};205 206static const struct bond_opt_value bond_lp_interval_tbl[] = {207 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},208 { "maxval", INT_MAX, BOND_VALFLAG_MAX},209 { NULL, -1, 0},210};211 212static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {213 { "off", 0, 0},214 { "on", 1, BOND_VALFLAG_DEFAULT},215 { NULL, -1, 0}216};217 218static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {219 { "minval", 1, BOND_VALFLAG_MIN},220 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},221 { NULL, -1, 0},222};223 224static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {225 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},226 { "maxval", 1023, BOND_VALFLAG_MAX},227 { NULL, -1, 0},228};229 230static const struct bond_opt_value bond_missed_max_tbl[] = {231 { "minval", 1, BOND_VALFLAG_MIN},232 { "maxval", 255, BOND_VALFLAG_MAX},233 { "default", 2, BOND_VALFLAG_DEFAULT},234 { NULL, -1, 0},235};236 237static const struct bond_opt_value bond_coupled_control_tbl[] = {238 { "on", 1, BOND_VALFLAG_DEFAULT},239 { "off", 0, 0},240 { NULL, -1, 0},241};242 243static const struct bond_option bond_opts[BOND_OPT_LAST] = {244 [BOND_OPT_MODE] = {245 .id = BOND_OPT_MODE,246 .name = "mode",247 .desc = "bond device mode",248 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,249 .values = bond_mode_tbl,250 .set = bond_option_mode_set251 },252 [BOND_OPT_PACKETS_PER_SLAVE] = {253 .id = BOND_OPT_PACKETS_PER_SLAVE,254 .name = "packets_per_slave",255 .desc = "Packets to send per slave in RR mode",256 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),257 .values = bond_pps_tbl,258 .set = bond_option_pps_set259 },260 [BOND_OPT_XMIT_HASH] = {261 .id = BOND_OPT_XMIT_HASH,262 .name = "xmit_hash_policy",263 .desc = "balance-xor, 802.3ad, and tlb hashing method",264 .values = bond_xmit_hashtype_tbl,265 .set = bond_option_xmit_hash_policy_set266 },267 [BOND_OPT_ARP_VALIDATE] = {268 .id = BOND_OPT_ARP_VALIDATE,269 .name = "arp_validate",270 .desc = "validate src/dst of ARP probes",271 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |272 BIT(BOND_MODE_ALB),273 .values = bond_arp_validate_tbl,274 .set = bond_option_arp_validate_set275 },276 [BOND_OPT_ARP_ALL_TARGETS] = {277 .id = BOND_OPT_ARP_ALL_TARGETS,278 .name = "arp_all_targets",279 .desc = "fail on any/all arp targets timeout",280 .values = bond_arp_all_targets_tbl,281 .set = bond_option_arp_all_targets_set282 },283 [BOND_OPT_FAIL_OVER_MAC] = {284 .id = BOND_OPT_FAIL_OVER_MAC,285 .name = "fail_over_mac",286 .desc = "For active-backup, do not set all slaves to the same MAC",287 .flags = BOND_OPTFLAG_NOSLAVES,288 .values = bond_fail_over_mac_tbl,289 .set = bond_option_fail_over_mac_set290 },291 [BOND_OPT_ARP_INTERVAL] = {292 .id = BOND_OPT_ARP_INTERVAL,293 .name = "arp_interval",294 .desc = "arp interval in milliseconds",295 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |296 BIT(BOND_MODE_ALB),297 .values = bond_intmax_tbl,298 .set = bond_option_arp_interval_set299 },300 [BOND_OPT_MISSED_MAX] = {301 .id = BOND_OPT_MISSED_MAX,302 .name = "arp_missed_max",303 .desc = "Maximum number of missed ARP interval",304 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |305 BIT(BOND_MODE_ALB),306 .values = bond_missed_max_tbl,307 .set = bond_option_missed_max_set308 },309 [BOND_OPT_ARP_TARGETS] = {310 .id = BOND_OPT_ARP_TARGETS,311 .name = "arp_ip_target",312 .desc = "arp targets in n.n.n.n form",313 .flags = BOND_OPTFLAG_RAWVAL,314 .set = bond_option_arp_ip_targets_set315 },316 [BOND_OPT_NS_TARGETS] = {317 .id = BOND_OPT_NS_TARGETS,318 .name = "ns_ip6_target",319 .desc = "NS targets in ffff:ffff::ffff:ffff form",320 .flags = BOND_OPTFLAG_RAWVAL,321 .set = bond_option_ns_ip6_targets_set322 },323 [BOND_OPT_DOWNDELAY] = {324 .id = BOND_OPT_DOWNDELAY,325 .name = "downdelay",326 .desc = "Delay before considering link down, in milliseconds",327 .values = bond_intmax_tbl,328 .set = bond_option_downdelay_set329 },330 [BOND_OPT_UPDELAY] = {331 .id = BOND_OPT_UPDELAY,332 .name = "updelay",333 .desc = "Delay before considering link up, in milliseconds",334 .values = bond_intmax_tbl,335 .set = bond_option_updelay_set336 },337 [BOND_OPT_LACP_ACTIVE] = {338 .id = BOND_OPT_LACP_ACTIVE,339 .name = "lacp_active",340 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",341 .flags = BOND_OPTFLAG_IFDOWN,342 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),343 .values = bond_lacp_active,344 .set = bond_option_lacp_active_set345 },346 [BOND_OPT_LACP_RATE] = {347 .id = BOND_OPT_LACP_RATE,348 .name = "lacp_rate",349 .desc = "LACPDU tx rate to request from 802.3ad partner",350 .flags = BOND_OPTFLAG_IFDOWN,351 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),352 .values = bond_lacp_rate_tbl,353 .set = bond_option_lacp_rate_set354 },355 [BOND_OPT_MINLINKS] = {356 .id = BOND_OPT_MINLINKS,357 .name = "min_links",358 .desc = "Minimum number of available links before turning on carrier",359 .values = bond_intmax_tbl,360 .set = bond_option_min_links_set361 },362 [BOND_OPT_AD_SELECT] = {363 .id = BOND_OPT_AD_SELECT,364 .name = "ad_select",365 .desc = "803.ad aggregation selection logic",366 .flags = BOND_OPTFLAG_IFDOWN,367 .values = bond_ad_select_tbl,368 .set = bond_option_ad_select_set369 },370 [BOND_OPT_NUM_PEER_NOTIF] = {371 .id = BOND_OPT_NUM_PEER_NOTIF,372 .name = "num_unsol_na",373 .desc = "Number of peer notifications to send on failover event",374 .values = bond_num_peer_notif_tbl,375 .set = bond_option_num_peer_notif_set376 },377 [BOND_OPT_MIIMON] = {378 .id = BOND_OPT_MIIMON,379 .name = "miimon",380 .desc = "Link check interval in milliseconds",381 .values = bond_intmax_tbl,382 .set = bond_option_miimon_set383 },384 [BOND_OPT_PRIO] = {385 .id = BOND_OPT_PRIO,386 .name = "prio",387 .desc = "Link priority for failover re-selection",388 .flags = BOND_OPTFLAG_RAWVAL,389 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |390 BIT(BOND_MODE_TLB) |391 BIT(BOND_MODE_ALB)),392 .set = bond_option_prio_set393 },394 [BOND_OPT_PRIMARY] = {395 .id = BOND_OPT_PRIMARY,396 .name = "primary",397 .desc = "Primary network device to use",398 .flags = BOND_OPTFLAG_RAWVAL,399 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |400 BIT(BOND_MODE_TLB) |401 BIT(BOND_MODE_ALB)),402 .set = bond_option_primary_set403 },404 [BOND_OPT_PRIMARY_RESELECT] = {405 .id = BOND_OPT_PRIMARY_RESELECT,406 .name = "primary_reselect",407 .desc = "Reselect primary slave once it comes up",408 .values = bond_primary_reselect_tbl,409 .set = bond_option_primary_reselect_set410 },411 [BOND_OPT_USE_CARRIER] = {412 .id = BOND_OPT_USE_CARRIER,413 .name = "use_carrier",414 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",415 .values = bond_use_carrier_tbl,416 .set = bond_option_use_carrier_set417 },418 [BOND_OPT_ACTIVE_SLAVE] = {419 .id = BOND_OPT_ACTIVE_SLAVE,420 .name = "active_slave",421 .desc = "Currently active slave",422 .flags = BOND_OPTFLAG_RAWVAL,423 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |424 BIT(BOND_MODE_TLB) |425 BIT(BOND_MODE_ALB)),426 .set = bond_option_active_slave_set427 },428 [BOND_OPT_QUEUE_ID] = {429 .id = BOND_OPT_QUEUE_ID,430 .name = "queue_id",431 .desc = "Set queue id of a slave",432 .flags = BOND_OPTFLAG_RAWVAL,433 .set = bond_option_queue_id_set434 },435 [BOND_OPT_ALL_SLAVES_ACTIVE] = {436 .id = BOND_OPT_ALL_SLAVES_ACTIVE,437 .name = "all_slaves_active",438 .desc = "Keep all frames received on an interface by setting active flag for all slaves",439 .values = bond_all_slaves_active_tbl,440 .set = bond_option_all_slaves_active_set441 },442 [BOND_OPT_RESEND_IGMP] = {443 .id = BOND_OPT_RESEND_IGMP,444 .name = "resend_igmp",445 .desc = "Number of IGMP membership reports to send on link failure",446 .values = bond_resend_igmp_tbl,447 .set = bond_option_resend_igmp_set448 },449 [BOND_OPT_LP_INTERVAL] = {450 .id = BOND_OPT_LP_INTERVAL,451 .name = "lp_interval",452 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",453 .values = bond_lp_interval_tbl,454 .set = bond_option_lp_interval_set455 },456 [BOND_OPT_SLAVES] = {457 .id = BOND_OPT_SLAVES,458 .name = "slaves",459 .desc = "Slave membership management",460 .flags = BOND_OPTFLAG_RAWVAL,461 .set = bond_option_slaves_set462 },463 [BOND_OPT_TLB_DYNAMIC_LB] = {464 .id = BOND_OPT_TLB_DYNAMIC_LB,465 .name = "tlb_dynamic_lb",466 .desc = "Enable dynamic flow shuffling",467 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),468 .values = bond_tlb_dynamic_lb_tbl,469 .flags = BOND_OPTFLAG_IFDOWN,470 .set = bond_option_tlb_dynamic_lb_set,471 },472 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {473 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,474 .name = "ad_actor_sys_prio",475 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),476 .values = bond_ad_actor_sys_prio_tbl,477 .set = bond_option_ad_actor_sys_prio_set,478 },479 [BOND_OPT_AD_ACTOR_SYSTEM] = {480 .id = BOND_OPT_AD_ACTOR_SYSTEM,481 .name = "ad_actor_system",482 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),483 .flags = BOND_OPTFLAG_RAWVAL,484 .set = bond_option_ad_actor_system_set,485 },486 [BOND_OPT_AD_USER_PORT_KEY] = {487 .id = BOND_OPT_AD_USER_PORT_KEY,488 .name = "ad_user_port_key",489 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),490 .flags = BOND_OPTFLAG_IFDOWN,491 .values = bond_ad_user_port_key_tbl,492 .set = bond_option_ad_user_port_key_set,493 },494 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {495 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,496 .name = "num_grat_arp",497 .desc = "Number of peer notifications to send on failover event",498 .values = bond_num_peer_notif_tbl,499 .set = bond_option_num_peer_notif_set500 },501 [BOND_OPT_PEER_NOTIF_DELAY] = {502 .id = BOND_OPT_PEER_NOTIF_DELAY,503 .name = "peer_notif_delay",504 .desc = "Delay between each peer notification on failover event, in milliseconds",505 .values = bond_peer_notif_delay_tbl,506 .set = bond_option_peer_notif_delay_set507 },508 [BOND_OPT_COUPLED_CONTROL] = {509 .id = BOND_OPT_COUPLED_CONTROL,510 .name = "coupled_control",511 .desc = "Opt into using coupled control MUX for LACP states",512 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),513 .flags = BOND_OPTFLAG_IFDOWN,514 .values = bond_coupled_control_tbl,515 .set = bond_option_coupled_control_set,516 }517};518 519/* Searches for an option by name */520const struct bond_option *bond_opt_get_by_name(const char *name)521{522 const struct bond_option *opt;523 int option;524 525 for (option = 0; option < BOND_OPT_LAST; option++) {526 opt = bond_opt_get(option);527 if (opt && !strcmp(opt->name, name))528 return opt;529 }530 531 return NULL;532}533 534/* Searches for a value in opt's values[] table */535const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)536{537 const struct bond_option *opt;538 int i;539 540 opt = bond_opt_get(option);541 if (WARN_ON(!opt))542 return NULL;543 for (i = 0; opt->values && opt->values[i].string; i++)544 if (opt->values[i].value == val)545 return &opt->values[i];546 547 return NULL;548}549 550/* Searches for a value in opt's values[] table which matches the flagmask */551static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,552 u32 flagmask)553{554 int i;555 556 for (i = 0; opt->values && opt->values[i].string; i++)557 if (opt->values[i].flags & flagmask)558 return &opt->values[i];559 560 return NULL;561}562 563/* If maxval is missing then there's no range to check. In case minval is564 * missing then it's considered to be 0.565 */566static bool bond_opt_check_range(const struct bond_option *opt, u64 val)567{568 const struct bond_opt_value *minval, *maxval;569 570 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);571 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);572 if (!maxval || (minval && val < minval->value) || val > maxval->value)573 return false;574 575 return true;576}577 578/**579 * bond_opt_parse - parse option value580 * @opt: the option to parse against581 * @val: value to parse582 *583 * This function tries to extract the value from @val and check if it's584 * a possible match for the option and returns NULL if a match isn't found,585 * or the struct_opt_value that matched. It also strips the new line from586 * @val->string if it's present.587 */588const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,589 struct bond_opt_value *val)590{591 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };592 const struct bond_opt_value *tbl;593 const struct bond_opt_value *ret = NULL;594 bool checkval;595 int i, rv;596 597 /* No parsing if the option wants a raw val */598 if (opt->flags & BOND_OPTFLAG_RAWVAL)599 return val;600 601 tbl = opt->values;602 if (!tbl)603 goto out;604 605 /* ULLONG_MAX is used to bypass string processing */606 checkval = val->value != ULLONG_MAX;607 if (!checkval) {608 if (!val->string)609 goto out;610 p = strchr(val->string, '\n');611 if (p)612 *p = '\0';613 for (p = val->string; *p; p++)614 if (!(isdigit(*p) || isspace(*p)))615 break;616 /* The following code extracts the string to match or the value617 * and sets checkval appropriately618 */619 if (*p) {620 rv = sscanf(val->string, "%32s", valstr);621 } else {622 rv = sscanf(val->string, "%llu", &val->value);623 checkval = true;624 }625 if (!rv)626 goto out;627 }628 629 for (i = 0; tbl[i].string; i++) {630 /* Check for exact match */631 if (checkval) {632 if (val->value == tbl[i].value)633 ret = &tbl[i];634 } else {635 if (!strcmp(valstr, "default") &&636 (tbl[i].flags & BOND_VALFLAG_DEFAULT))637 ret = &tbl[i];638 639 if (!strcmp(valstr, tbl[i].string))640 ret = &tbl[i];641 }642 /* Found an exact match */643 if (ret)644 goto out;645 }646 /* Possible range match */647 if (checkval && bond_opt_check_range(opt, val->value))648 ret = val;649out:650 return ret;651}652 653/* Check opt's dependencies against bond mode and currently set options */654static int bond_opt_check_deps(struct bonding *bond,655 const struct bond_option *opt)656{657 struct bond_params *params = &bond->params;658 659 if (test_bit(params->mode, &opt->unsuppmodes))660 return -EACCES;661 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))662 return -ENOTEMPTY;663 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))664 return -EBUSY;665 666 return 0;667}668 669static void bond_opt_dep_print(struct bonding *bond,670 const struct bond_option *opt,671 struct nlattr *bad_attr,672 struct netlink_ext_ack *extack)673{674 const struct bond_opt_value *modeval;675 struct bond_params *params;676 677 params = &bond->params;678 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);679 if (test_bit(params->mode, &opt->unsuppmodes)) {680 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",681 opt->name, modeval->string, modeval->value);682 NL_SET_ERR_MSG_ATTR(extack, bad_attr,683 "option not supported in mode");684 }685}686 687static void bond_opt_error_interpret(struct bonding *bond,688 const struct bond_option *opt,689 int error, const struct bond_opt_value *val,690 struct nlattr *bad_attr,691 struct netlink_ext_ack *extack)692{693 const struct bond_opt_value *minval, *maxval;694 char *p;695 696 switch (error) {697 case -EINVAL:698 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value");699 if (val) {700 if (val->string) {701 /* sometimes RAWVAL opts may have new lines */702 p = strchr(val->string, '\n');703 if (p)704 *p = '\0';705 netdev_err(bond->dev, "option %s: invalid value (%s)\n",706 opt->name, val->string);707 } else {708 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",709 opt->name, val->value);710 }711 }712 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);713 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);714 if (!maxval)715 break;716 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",717 opt->name, minval ? minval->value : 0, maxval->value);718 break;719 case -EACCES:720 bond_opt_dep_print(bond, opt, bad_attr, extack);721 break;722 case -ENOTEMPTY:723 NL_SET_ERR_MSG_ATTR(extack, bad_attr,724 "unable to set option because the bond device has slaves");725 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",726 opt->name);727 break;728 case -EBUSY:729 NL_SET_ERR_MSG_ATTR(extack, bad_attr,730 "unable to set option because the bond is up");731 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",732 opt->name);733 break;734 case -ENODEV:735 if (val && val->string) {736 p = strchr(val->string, '\n');737 if (p)738 *p = '\0';739 netdev_err(bond->dev, "option %s: interface %s does not exist!\n",740 opt->name, val->string);741 NL_SET_ERR_MSG_ATTR(extack, bad_attr,742 "interface does not exist");743 }744 break;745 default:746 break;747 }748}749 750/**751 * __bond_opt_set - set a bonding option752 * @bond: target bond device753 * @option: option to set754 * @val: value to set it to755 * @bad_attr: netlink attribue that caused the error756 * @extack: extended netlink error structure, used when an error message757 * needs to be returned to the caller via netlink758 *759 * This function is used to change the bond's option value, it can be760 * used for both enabling/changing an option and for disabling it. RTNL lock761 * must be obtained before calling this function.762 */763int __bond_opt_set(struct bonding *bond,764 unsigned int option, struct bond_opt_value *val,765 struct nlattr *bad_attr, struct netlink_ext_ack *extack)766{767 const struct bond_opt_value *retval = NULL;768 const struct bond_option *opt;769 int ret = -ENOENT;770 771 ASSERT_RTNL();772 773 opt = bond_opt_get(option);774 if (WARN_ON(!val) || WARN_ON(!opt))775 goto out;776 ret = bond_opt_check_deps(bond, opt);777 if (ret)778 goto out;779 retval = bond_opt_parse(opt, val);780 if (!retval) {781 ret = -EINVAL;782 goto out;783 }784 ret = opt->set(bond, retval);785out:786 if (ret)787 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack);788 789 return ret;790}791/**792 * __bond_opt_set_notify - set a bonding option793 * @bond: target bond device794 * @option: option to set795 * @val: value to set it to796 *797 * This function is used to change the bond's option value and trigger798 * a notification to user sapce. It can be used for both enabling/changing799 * an option and for disabling it. RTNL lock must be obtained before calling800 * this function.801 */802int __bond_opt_set_notify(struct bonding *bond,803 unsigned int option, struct bond_opt_value *val)804{805 int ret;806 807 ASSERT_RTNL();808 809 ret = __bond_opt_set(bond, option, val, NULL, NULL);810 811 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))812 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);813 814 return ret;815}816 817/**818 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set819 * @bond: target bond device820 * @option: option to set821 * @buf: value to set it to822 *823 * This function tries to acquire RTNL without blocking and if successful824 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.825 */826int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)827{828 struct bond_opt_value optval;829 int ret;830 831 if (!rtnl_trylock())832 return restart_syscall();833 bond_opt_initstr(&optval, buf);834 ret = __bond_opt_set_notify(bond, option, &optval);835 rtnl_unlock();836 837 return ret;838}839 840/**841 * bond_opt_get - get a pointer to an option842 * @option: option for which to return a pointer843 *844 * This function checks if option is valid and if so returns a pointer845 * to its entry in the bond_opts[] option array.846 */847const struct bond_option *bond_opt_get(unsigned int option)848{849 if (!BOND_OPT_VALID(option))850 return NULL;851 852 return &bond_opts[option];853}854 855static bool bond_set_xfrm_features(struct bonding *bond)856{857 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))858 return false;859 860 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)861 bond->dev->wanted_features |= BOND_XFRM_FEATURES;862 else863 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;864 865 return true;866}867 868static int bond_option_mode_set(struct bonding *bond,869 const struct bond_opt_value *newval)870{871 if (!bond_mode_uses_arp(newval->value)) {872 if (bond->params.arp_interval) {873 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",874 newval->string);875 /* disable arp monitoring */876 bond->params.arp_interval = 0;877 }878 879 if (!bond->params.miimon) {880 /* set miimon to default value */881 bond->params.miimon = BOND_DEFAULT_MIIMON;882 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",883 bond->params.miimon);884 }885 }886 887 if (newval->value == BOND_MODE_ALB)888 bond->params.tlb_dynamic_lb = 1;889 890 /* don't cache arp_validate between modes */891 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;892 bond->params.mode = newval->value;893 894 if (bond->dev->reg_state == NETREG_REGISTERED) {895 bool update = false;896 897 update |= bond_set_xfrm_features(bond);898 899 if (update)900 netdev_update_features(bond->dev);901 }902 903 bond_xdp_set_features(bond->dev);904 905 return 0;906}907 908static int bond_option_active_slave_set(struct bonding *bond,909 const struct bond_opt_value *newval)910{911 char ifname[IFNAMSIZ] = { 0, };912 struct net_device *slave_dev;913 int ret = 0;914 915 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */916 if (!strlen(ifname) || newval->string[0] == '\n') {917 slave_dev = NULL;918 } else {919 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);920 if (!slave_dev)921 return -ENODEV;922 }923 924 if (slave_dev) {925 if (!netif_is_bond_slave(slave_dev)) {926 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");927 return -EINVAL;928 }929 930 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {931 slave_err(bond->dev, slave_dev, "Device is not our slave\n");932 return -EINVAL;933 }934 }935 936 block_netpoll_tx();937 /* check to see if we are clearing active */938 if (!slave_dev) {939 netdev_dbg(bond->dev, "Clearing current active slave\n");940 bond_change_active_slave(bond, NULL);941 bond_select_active_slave(bond);942 } else {943 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);944 struct slave *new_active = bond_slave_get_rtnl(slave_dev);945 946 BUG_ON(!new_active);947 948 if (new_active == old_active) {949 /* do nothing */950 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");951 } else {952 if (old_active && (new_active->link == BOND_LINK_UP) &&953 bond_slave_is_up(new_active)) {954 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");955 bond_change_active_slave(bond, new_active);956 } else {957 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",958 new_active->dev->name);959 ret = -EINVAL;960 }961 }962 }963 unblock_netpoll_tx();964 965 return ret;966}967 968/* There are two tricky bits here. First, if MII monitoring is activated, then969 * we must disable ARP monitoring. Second, if the timer isn't running, we must970 * start it.971 */972static int bond_option_miimon_set(struct bonding *bond,973 const struct bond_opt_value *newval)974{975 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",976 newval->value);977 bond->params.miimon = newval->value;978 if (bond->params.updelay)979 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",980 bond->params.updelay * bond->params.miimon);981 if (bond->params.downdelay)982 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",983 bond->params.downdelay * bond->params.miimon);984 if (bond->params.peer_notif_delay)985 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",986 bond->params.peer_notif_delay * bond->params.miimon);987 if (newval->value && bond->params.arp_interval) {988 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");989 bond->params.arp_interval = 0;990 if (bond->params.arp_validate)991 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;992 }993 if (bond->dev->flags & IFF_UP) {994 /* If the interface is up, we may need to fire off995 * the MII timer. If the interface is down, the996 * timer will get fired off when the open function997 * is called.998 */999 if (!newval->value) {1000 cancel_delayed_work_sync(&bond->mii_work);1001 } else {1002 cancel_delayed_work_sync(&bond->arp_work);1003 queue_delayed_work(bond->wq, &bond->mii_work, 0);1004 }1005 }1006 1007 return 0;1008}1009 1010/* Set up, down and peer notification delays. These must be multiples1011 * of the MII monitoring value, and are stored internally as the1012 * multiplier. Thus, we must translate to MS for the real world.1013 */1014static int _bond_option_delay_set(struct bonding *bond,1015 const struct bond_opt_value *newval,1016 const char *name,1017 int *target)1018{1019 int value = newval->value;1020 1021 if (!bond->params.miimon) {1022 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",1023 name);1024 return -EPERM;1025 }1026 if ((value % bond->params.miimon) != 0) {1027 netdev_warn(bond->dev,1028 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",1029 name,1030 value, bond->params.miimon,1031 (value / bond->params.miimon) *1032 bond->params.miimon);1033 }1034 *target = value / bond->params.miimon;1035 netdev_dbg(bond->dev, "Setting %s to %d\n",1036 name,1037 *target * bond->params.miimon);1038 1039 return 0;1040}1041 1042static int bond_option_updelay_set(struct bonding *bond,1043 const struct bond_opt_value *newval)1044{1045 return _bond_option_delay_set(bond, newval, "up delay",1046 &bond->params.updelay);1047}1048 1049static int bond_option_downdelay_set(struct bonding *bond,1050 const struct bond_opt_value *newval)1051{1052 return _bond_option_delay_set(bond, newval, "down delay",1053 &bond->params.downdelay);1054}1055 1056static int bond_option_peer_notif_delay_set(struct bonding *bond,1057 const struct bond_opt_value *newval)1058{1059 int ret = _bond_option_delay_set(bond, newval,1060 "peer notification delay",1061 &bond->params.peer_notif_delay);1062 return ret;1063}1064 1065static int bond_option_use_carrier_set(struct bonding *bond,1066 const struct bond_opt_value *newval)1067{1068 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",1069 newval->value);1070 bond->params.use_carrier = newval->value;1071 1072 return 0;1073}1074 1075/* There are two tricky bits here. First, if ARP monitoring is activated, then1076 * we must disable MII monitoring. Second, if the ARP timer isn't running,1077 * we must start it.1078 */1079static int bond_option_arp_interval_set(struct bonding *bond,1080 const struct bond_opt_value *newval)1081{1082 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",1083 newval->value);1084 bond->params.arp_interval = newval->value;1085 if (newval->value) {1086 if (bond->params.miimon) {1087 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");1088 bond->params.miimon = 0;1089 }1090 if (!bond->params.arp_targets[0])1091 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");1092 }1093 if (bond->dev->flags & IFF_UP) {1094 /* If the interface is up, we may need to fire off1095 * the ARP timer. If the interface is down, the1096 * timer will get fired off when the open function1097 * is called.1098 */1099 if (!newval->value) {1100 if (bond->params.arp_validate)1101 bond->recv_probe = NULL;1102 cancel_delayed_work_sync(&bond->arp_work);1103 } else {1104 /* arp_validate can be set only in active-backup mode */1105 bond->recv_probe = bond_rcv_validate;1106 cancel_delayed_work_sync(&bond->mii_work);1107 queue_delayed_work(bond->wq, &bond->arp_work, 0);1108 }1109 }1110 1111 return 0;1112}1113 1114static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,1115 __be32 target,1116 unsigned long last_rx)1117{1118 __be32 *targets = bond->params.arp_targets;1119 struct list_head *iter;1120 struct slave *slave;1121 1122 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {1123 bond_for_each_slave(bond, slave, iter)1124 slave->target_last_arp_rx[slot] = last_rx;1125 targets[slot] = target;1126 }1127}1128 1129static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)1130{1131 __be32 *targets = bond->params.arp_targets;1132 int ind;1133 1134 if (!bond_is_ip_target_ok(target)) {1135 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",1136 &target);1137 return -EINVAL;1138 }1139 1140 if (bond_get_targets_ip(targets, target) != -1) { /* dup */1141 netdev_err(bond->dev, "ARP target %pI4 is already present\n",1142 &target);1143 return -EINVAL;1144 }1145 1146 ind = bond_get_targets_ip(targets, 0); /* first free slot */1147 if (ind == -1) {1148 netdev_err(bond->dev, "ARP target table is full!\n");1149 return -EINVAL;1150 }1151 1152 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);1153 1154 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);1155 1156 return 0;1157}1158 1159static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)1160{1161 return _bond_option_arp_ip_target_add(bond, target);1162}1163 1164static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)1165{1166 __be32 *targets = bond->params.arp_targets;1167 struct list_head *iter;1168 struct slave *slave;1169 unsigned long *targets_rx;1170 int ind, i;1171 1172 if (!bond_is_ip_target_ok(target)) {1173 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",1174 &target);1175 return -EINVAL;1176 }1177 1178 ind = bond_get_targets_ip(targets, target);1179 if (ind == -1) {1180 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",1181 &target);1182 return -EINVAL;1183 }1184 1185 if (ind == 0 && !targets[1] && bond->params.arp_interval)1186 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");1187 1188 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);1189 1190 bond_for_each_slave(bond, slave, iter) {1191 targets_rx = slave->target_last_arp_rx;1192 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)1193 targets_rx[i] = targets_rx[i+1];1194 targets_rx[i] = 0;1195 }1196 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)1197 targets[i] = targets[i+1];1198 targets[i] = 0;1199 1200 return 0;1201}1202 1203void bond_option_arp_ip_targets_clear(struct bonding *bond)1204{1205 int i;1206 1207 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)1208 _bond_options_arp_ip_target_set(bond, i, 0, 0);1209}1210 1211static int bond_option_arp_ip_targets_set(struct bonding *bond,1212 const struct bond_opt_value *newval)1213{1214 int ret = -EPERM;1215 __be32 target;1216 1217 if (newval->string) {1218 if (strlen(newval->string) < 1 ||1219 !in4_pton(newval->string + 1, -1, (u8 *)&target, -1, NULL)) {1220 netdev_err(bond->dev, "invalid ARP target specified\n");1221 return ret;1222 }1223 if (newval->string[0] == '+')1224 ret = bond_option_arp_ip_target_add(bond, target);1225 else if (newval->string[0] == '-')1226 ret = bond_option_arp_ip_target_rem(bond, target);1227 else1228 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");1229 } else {1230 target = newval->value;1231 ret = bond_option_arp_ip_target_add(bond, target);1232 }1233 1234 return ret;1235}1236 1237#if IS_ENABLED(CONFIG_IPV6)1238static bool slave_can_set_ns_maddr(const struct bonding *bond, struct slave *slave)1239{1240 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&1241 !bond_is_active_slave(slave) &&1242 slave->dev->flags & IFF_MULTICAST;1243}1244 1245static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add)1246{1247 struct in6_addr *targets = bond->params.ns_targets;1248 char slot_maddr[MAX_ADDR_LEN];1249 int i;1250 1251 if (!slave_can_set_ns_maddr(bond, slave))1252 return;1253 1254 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {1255 if (ipv6_addr_any(&targets[i]))1256 break;1257 1258 if (!ndisc_mc_map(&targets[i], slot_maddr, slave->dev, 0)) {1259 if (add)1260 dev_mc_add(slave->dev, slot_maddr);1261 else1262 dev_mc_del(slave->dev, slot_maddr);1263 }1264 }1265}1266 1267void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave)1268{1269 if (!bond->params.arp_validate)1270 return;1271 slave_set_ns_maddrs(bond, slave, true);1272}1273 1274void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave)1275{1276 if (!bond->params.arp_validate)1277 return;1278 slave_set_ns_maddrs(bond, slave, false);1279}1280 1281static void slave_set_ns_maddr(struct bonding *bond, struct slave *slave,1282 struct in6_addr *target, struct in6_addr *slot)1283{1284 char target_maddr[MAX_ADDR_LEN], slot_maddr[MAX_ADDR_LEN];1285 1286 if (!bond->params.arp_validate || !slave_can_set_ns_maddr(bond, slave))1287 return;1288 1289 /* remove the previous maddr from slave */1290 if (!ipv6_addr_any(slot) &&1291 !ndisc_mc_map(slot, slot_maddr, slave->dev, 0))1292 dev_mc_del(slave->dev, slot_maddr);1293 1294 /* add new maddr on slave if target is set */1295 if (!ipv6_addr_any(target) &&1296 !ndisc_mc_map(target, target_maddr, slave->dev, 0))1297 dev_mc_add(slave->dev, target_maddr);1298}1299 1300static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,1301 struct in6_addr *target,1302 unsigned long last_rx)1303{1304 struct in6_addr *targets = bond->params.ns_targets;1305 struct list_head *iter;1306 struct slave *slave;1307 1308 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {1309 bond_for_each_slave(bond, slave, iter) {1310 slave->target_last_arp_rx[slot] = last_rx;1311 slave_set_ns_maddr(bond, slave, target, &targets[slot]);1312 }1313 targets[slot] = *target;1314 }1315}1316 1317void bond_option_ns_ip6_targets_clear(struct bonding *bond)1318{1319 struct in6_addr addr_any = in6addr_any;1320 int i;1321 1322 for (i = 0; i < BOND_MAX_NS_TARGETS; i++)1323 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);1324}1325 1326static int bond_option_ns_ip6_targets_set(struct bonding *bond,1327 const struct bond_opt_value *newval)1328{1329 struct in6_addr *target = (struct in6_addr *)newval->extra;1330 struct in6_addr *targets = bond->params.ns_targets;1331 struct in6_addr addr_any = in6addr_any;1332 int index;1333 1334 if (!bond_is_ip6_target_ok(target)) {1335 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",1336 target);1337 return -EINVAL;1338 }1339 1340 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */1341 netdev_err(bond->dev, "NS target %pI6c is already present\n",1342 target);1343 return -EINVAL;1344 }1345 1346 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */1347 if (index == -1) {1348 netdev_err(bond->dev, "NS target table is full!\n");1349 return -EINVAL;1350 }1351 1352 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);1353 1354 _bond_options_ns_ip6_target_set(bond, index, target, jiffies);1355 1356 return 0;1357}1358#else1359static int bond_option_ns_ip6_targets_set(struct bonding *bond,1360 const struct bond_opt_value *newval)1361{1362 return -EPERM;1363}1364 1365static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add) {}1366 1367void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave) {}1368 1369void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave) {}1370#endif1371 1372static int bond_option_arp_validate_set(struct bonding *bond,1373 const struct bond_opt_value *newval)1374{1375 bool changed = !!bond->params.arp_validate != !!newval->value;1376 struct list_head *iter;1377 struct slave *slave;1378 1379 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",1380 newval->string, newval->value);1381 bond->params.arp_validate = newval->value;1382 1383 if (changed) {1384 bond_for_each_slave(bond, slave, iter)1385 slave_set_ns_maddrs(bond, slave, !!bond->params.arp_validate);1386 }1387 1388 return 0;1389}1390 1391static int bond_option_arp_all_targets_set(struct bonding *bond,1392 const struct bond_opt_value *newval)1393{1394 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",1395 newval->string, newval->value);1396 bond->params.arp_all_targets = newval->value;1397 1398 return 0;1399}1400 1401static int bond_option_missed_max_set(struct bonding *bond,1402 const struct bond_opt_value *newval)1403{1404 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",1405 newval->string, newval->value);1406 bond->params.missed_max = newval->value;1407 1408 return 0;1409}1410 1411static int bond_option_prio_set(struct bonding *bond,1412 const struct bond_opt_value *newval)1413{1414 struct slave *slave;1415 1416 slave = bond_slave_get_rtnl(newval->slave_dev);1417 if (!slave) {1418 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);1419 return -ENODEV;1420 }1421 slave->prio = newval->value;1422 1423 if (rtnl_dereference(bond->primary_slave))1424 slave_warn(bond->dev, slave->dev,1425 "prio updated, but will not affect failover re-selection as primary slave have been set\n");1426 else1427 bond_select_active_slave(bond);1428 1429 return 0;1430}1431 1432static int bond_option_primary_set(struct bonding *bond,1433 const struct bond_opt_value *newval)1434{1435 char *p, *primary = newval->string;1436 struct list_head *iter;1437 struct slave *slave;1438 1439 block_netpoll_tx();1440 1441 p = strchr(primary, '\n');1442 if (p)1443 *p = '\0';1444 /* check to see if we are clearing primary */1445 if (!strlen(primary)) {1446 netdev_dbg(bond->dev, "Setting primary slave to None\n");1447 RCU_INIT_POINTER(bond->primary_slave, NULL);1448 memset(bond->params.primary, 0, sizeof(bond->params.primary));1449 bond_select_active_slave(bond);1450 goto out;1451 }1452 1453 bond_for_each_slave(bond, slave, iter) {1454 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {1455 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");1456 rcu_assign_pointer(bond->primary_slave, slave);1457 strcpy(bond->params.primary, slave->dev->name);1458 bond->force_primary = true;1459 bond_select_active_slave(bond);1460 goto out;1461 }1462 }1463 1464 if (rtnl_dereference(bond->primary_slave)) {1465 netdev_dbg(bond->dev, "Setting primary slave to None\n");1466 RCU_INIT_POINTER(bond->primary_slave, NULL);1467 bond_select_active_slave(bond);1468 }1469 strscpy_pad(bond->params.primary, primary, IFNAMSIZ);1470 1471 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",1472 primary);1473 1474out:1475 unblock_netpoll_tx();1476 1477 return 0;1478}1479 1480static int bond_option_primary_reselect_set(struct bonding *bond,1481 const struct bond_opt_value *newval)1482{1483 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",1484 newval->string, newval->value);1485 bond->params.primary_reselect = newval->value;1486 1487 block_netpoll_tx();1488 bond_select_active_slave(bond);1489 unblock_netpoll_tx();1490 1491 return 0;1492}1493 1494static int bond_option_fail_over_mac_set(struct bonding *bond,1495 const struct bond_opt_value *newval)1496{1497 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",1498 newval->string, newval->value);1499 bond->params.fail_over_mac = newval->value;1500 1501 return 0;1502}1503 1504static int bond_option_xmit_hash_policy_set(struct bonding *bond,1505 const struct bond_opt_value *newval)1506{1507 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",1508 newval->string, newval->value);1509 bond->params.xmit_policy = newval->value;1510 1511 return 0;1512}1513 1514static int bond_option_resend_igmp_set(struct bonding *bond,1515 const struct bond_opt_value *newval)1516{1517 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",1518 newval->value);1519 bond->params.resend_igmp = newval->value;1520 1521 return 0;1522}1523 1524static int bond_option_num_peer_notif_set(struct bonding *bond,1525 const struct bond_opt_value *newval)1526{1527 bond->params.num_peer_notif = newval->value;1528 1529 return 0;1530}1531 1532static int bond_option_all_slaves_active_set(struct bonding *bond,1533 const struct bond_opt_value *newval)1534{1535 struct list_head *iter;1536 struct slave *slave;1537 1538 if (newval->value == bond->params.all_slaves_active)1539 return 0;1540 bond->params.all_slaves_active = newval->value;1541 bond_for_each_slave(bond, slave, iter) {1542 if (!bond_is_active_slave(slave)) {1543 if (newval->value)1544 slave->inactive = 0;1545 else1546 slave->inactive = 1;1547 }1548 }1549 1550 return 0;1551}1552 1553static int bond_option_min_links_set(struct bonding *bond,1554 const struct bond_opt_value *newval)1555{1556 netdev_dbg(bond->dev, "Setting min links value to %llu\n",1557 newval->value);1558 bond->params.min_links = newval->value;1559 bond_set_carrier(bond);1560 1561 return 0;1562}1563 1564static int bond_option_lp_interval_set(struct bonding *bond,1565 const struct bond_opt_value *newval)1566{1567 bond->params.lp_interval = newval->value;1568 1569 return 0;1570}1571 1572static int bond_option_pps_set(struct bonding *bond,1573 const struct bond_opt_value *newval)1574{1575 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",1576 newval->value);1577 bond->params.packets_per_slave = newval->value;1578 if (newval->value > 0) {1579 bond->params.reciprocal_packets_per_slave =1580 reciprocal_value(newval->value);1581 } else {1582 /* reciprocal_packets_per_slave is unused if1583 * packets_per_slave is 0 or 1, just initialize it1584 */1585 bond->params.reciprocal_packets_per_slave =1586 (struct reciprocal_value) { 0 };1587 }1588 1589 return 0;1590}1591 1592static int bond_option_lacp_active_set(struct bonding *bond,1593 const struct bond_opt_value *newval)1594{1595 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",1596 newval->string, newval->value);1597 bond->params.lacp_active = newval->value;1598 1599 return 0;1600}1601 1602static int bond_option_lacp_rate_set(struct bonding *bond,1603 const struct bond_opt_value *newval)1604{1605 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",1606 newval->string, newval->value);1607 bond->params.lacp_fast = newval->value;1608 bond_3ad_update_lacp_rate(bond);1609 1610 return 0;1611}1612 1613static int bond_option_ad_select_set(struct bonding *bond,1614 const struct bond_opt_value *newval)1615{1616 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",1617 newval->string, newval->value);1618 bond->params.ad_select = newval->value;1619 1620 return 0;1621}1622 1623static int bond_option_queue_id_set(struct bonding *bond,1624 const struct bond_opt_value *newval)1625{1626 struct slave *slave, *update_slave;1627 struct net_device *sdev;1628 struct list_head *iter;1629 char *delim;1630 int ret = 0;1631 u16 qid;1632 1633 /* delim will point to queue id if successful */1634 delim = strchr(newval->string, ':');1635 if (!delim)1636 goto err_no_cmd;1637 1638 /* Terminate string that points to device name and bump it1639 * up one, so we can read the queue id there.1640 */1641 *delim = '\0';1642 if (sscanf(++delim, "%hd\n", &qid) != 1)1643 goto err_no_cmd;1644 1645 /* Check buffer length, valid ifname and queue id */1646 if (!dev_valid_name(newval->string) ||1647 qid > bond->dev->real_num_tx_queues)1648 goto err_no_cmd;1649 1650 /* Get the pointer to that interface if it exists */1651 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);1652 if (!sdev)1653 goto err_no_cmd;1654 1655 /* Search for thes slave and check for duplicate qids */1656 update_slave = NULL;1657 bond_for_each_slave(bond, slave, iter) {1658 if (sdev == slave->dev)1659 /* We don't need to check the matching1660 * slave for dups, since we're overwriting it1661 */1662 update_slave = slave;1663 else if (qid && qid == slave->queue_id) {1664 goto err_no_cmd;1665 }1666 }1667 1668 if (!update_slave)1669 goto err_no_cmd;1670 1671 /* Actually set the qids for the slave */1672 WRITE_ONCE(update_slave->queue_id, qid);1673 1674out:1675 return ret;1676 1677err_no_cmd:1678 netdev_dbg(bond->dev, "invalid input for queue_id set\n");1679 ret = -EPERM;1680 goto out;1681 1682}1683 1684static int bond_option_slaves_set(struct bonding *bond,1685 const struct bond_opt_value *newval)1686{1687 char command[IFNAMSIZ + 1] = { 0, };1688 struct net_device *dev;1689 char *ifname;1690 int ret;1691 1692 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/1693 ifname = command + 1;1694 if ((strlen(command) <= 1) ||1695 (command[0] != '+' && command[0] != '-') ||1696 !dev_valid_name(ifname))1697 goto err_no_cmd;1698 1699 dev = __dev_get_by_name(dev_net(bond->dev), ifname);1700 if (!dev) {1701 netdev_dbg(bond->dev, "interface %s does not exist!\n",1702 ifname);1703 ret = -ENODEV;1704 goto out;1705 }1706 1707 switch (command[0]) {1708 case '+':1709 slave_dbg(bond->dev, dev, "Enslaving interface\n");1710 ret = bond_enslave(bond->dev, dev, NULL);1711 break;1712 1713 case '-':1714 slave_dbg(bond->dev, dev, "Releasing interface\n");1715 ret = bond_release(bond->dev, dev);1716 break;1717 1718 default:1719 /* should not run here. */1720 goto err_no_cmd;1721 }1722 1723out:1724 return ret;1725 1726err_no_cmd:1727 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");1728 ret = -EPERM;1729 goto out;1730}1731 1732static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,1733 const struct bond_opt_value *newval)1734{1735 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",1736 newval->string, newval->value);1737 bond->params.tlb_dynamic_lb = newval->value;1738 1739 return 0;1740}1741 1742static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,1743 const struct bond_opt_value *newval)1744{1745 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",1746 newval->value);1747 1748 bond->params.ad_actor_sys_prio = newval->value;1749 bond_3ad_update_ad_actor_settings(bond);1750 1751 return 0;1752}1753 1754static int bond_option_ad_actor_system_set(struct bonding *bond,1755 const struct bond_opt_value *newval)1756{1757 u8 macaddr[ETH_ALEN];1758 u8 *mac;1759 1760 if (newval->string) {1761 if (!mac_pton(newval->string, macaddr))1762 goto err;1763 mac = macaddr;1764 } else {1765 mac = (u8 *)&newval->value;1766 }1767 1768 if (is_multicast_ether_addr(mac))1769 goto err;1770 1771 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);1772 ether_addr_copy(bond->params.ad_actor_system, mac);1773 bond_3ad_update_ad_actor_settings(bond);1774 1775 return 0;1776 1777err:1778 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");1779 return -EINVAL;1780}1781 1782static int bond_option_ad_user_port_key_set(struct bonding *bond,1783 const struct bond_opt_value *newval)1784{1785 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",1786 newval->value);1787 1788 bond->params.ad_user_port_key = newval->value;1789 return 0;1790}1791 1792static int bond_option_coupled_control_set(struct bonding *bond,1793 const struct bond_opt_value *newval)1794{1795 netdev_info(bond->dev, "Setting coupled_control to %s (%llu)\n",1796 newval->string, newval->value);1797 1798 bond->params.coupled_control = newval->value;1799 return 0;1800}1801