1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. 4 */ 5 6#include <linux/skbuff.h> 7#include <linux/if_ether.h> 8#include <linux/netdevice.h> 9#include <linux/spinlock.h> 10#include <linux/ethtool.h> 11#include <linux/etherdevice.h> 12#include <linux/if_bonding.h> 13#include <linux/pkt_sched.h> 14#include <net/net_namespace.h> 15#include <net/bonding.h> 16#include <net/bond_3ad.h> 17#include <net/netlink.h> 18 19/* General definitions */ 20#define AD_SHORT_TIMEOUT 1 21#define AD_LONG_TIMEOUT 0 22#define AD_STANDBY 0x2 23#define AD_MAX_TX_IN_SECOND 3 24#define AD_COLLECTOR_MAX_DELAY 0 25 26/* Timer definitions (43.4.4 in the 802.3ad standard) */ 27#define AD_FAST_PERIODIC_TIME 1 28#define AD_SLOW_PERIODIC_TIME 30 29#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) 30#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) 31#define AD_CHURN_DETECTION_TIME 60 32#define AD_AGGREGATE_WAIT_TIME 2 33 34/* Port Variables definitions used by the State Machines (43.4.7 in the 35 * 802.3ad standard) 36 */ 37#define AD_PORT_BEGIN 0x1 38#define AD_PORT_LACP_ENABLED 0x2 39#define AD_PORT_ACTOR_CHURN 0x4 40#define AD_PORT_PARTNER_CHURN 0x8 41#define AD_PORT_READY 0x10 42#define AD_PORT_READY_N 0x20 43#define AD_PORT_MATCHED 0x40 44#define AD_PORT_STANDBY 0x80 45#define AD_PORT_SELECTED 0x100 46#define AD_PORT_MOVED 0x200 47#define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN) 48 49/* Port Key definitions 50 * key is determined according to the link speed, duplex and 51 * user key (which is yet not supported) 52 * -------------------------------------------------------------- 53 * Port key | User key (10 bits) | Speed (5 bits) | Duplex| 54 * -------------------------------------------------------------- 55 * |15 6|5 1|0 56 */ 57#define AD_DUPLEX_KEY_MASKS 0x1 58#define AD_SPEED_KEY_MASKS 0x3E 59#define AD_USER_KEY_MASKS 0xFFC0 60 61enum ad_link_speed_type { 62 AD_LINK_SPEED_1MBPS = 1, 63 AD_LINK_SPEED_10MBPS, 64 AD_LINK_SPEED_100MBPS, 65 AD_LINK_SPEED_1000MBPS, 66 AD_LINK_SPEED_2500MBPS, 67 AD_LINK_SPEED_5000MBPS, 68 AD_LINK_SPEED_10000MBPS, 69 AD_LINK_SPEED_14000MBPS, 70 AD_LINK_SPEED_20000MBPS, 71 AD_LINK_SPEED_25000MBPS, 72 AD_LINK_SPEED_40000MBPS, 73 AD_LINK_SPEED_50000MBPS, 74 AD_LINK_SPEED_56000MBPS, 75 AD_LINK_SPEED_100000MBPS, 76 AD_LINK_SPEED_200000MBPS, 77 AD_LINK_SPEED_400000MBPS, 78 AD_LINK_SPEED_800000MBPS, 79}; 80 81/* compare MAC addresses */ 82#define MAC_ADDRESS_EQUAL(A, B) \ 83 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 84 85static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = { 86 0, 0, 0, 0, 0, 0 87}; 88 89static const u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL; 90static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 91 92const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = { 93 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 94}; 95 96/* ================= main 802.3ad protocol functions ================== */ 97static int ad_lacpdu_send(struct port *port); 98static int ad_marker_send(struct port *port, struct bond_marker *marker); 99static void ad_mux_machine(struct port *port, bool *update_slave_arr); 100static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 101static void ad_tx_machine(struct port *port); 102static void ad_periodic_machine(struct port *port, struct bond_params *bond_params); 103static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 104static void ad_agg_selection_logic(struct aggregator *aggregator, 105 bool *update_slave_arr); 106static void ad_clear_agg(struct aggregator *aggregator); 107static void ad_initialize_agg(struct aggregator *aggregator); 108static void ad_initialize_port(struct port *port, int lacp_fast); 109static void ad_enable_collecting_distributing(struct port *port, 110 bool *update_slave_arr); 111static void ad_disable_collecting_distributing(struct port *port, 112 bool *update_slave_arr); 113static void ad_marker_info_received(struct bond_marker *marker_info, 114 struct port *port); 115static void ad_marker_response_received(struct bond_marker *marker, 116 struct port *port); 117static void ad_update_actor_keys(struct port *port, bool reset); 118 119 120/* ================= api to bonding and kernel code ================== */ 121 122/** 123 * __get_bond_by_port - get the port's bonding struct 124 * @port: the port we're looking at 125 * 126 * Return @port's bonding struct, or %NULL if it can't be found. 127 */ 128static inline struct bonding *__get_bond_by_port(struct port *port) 129{ 130 if (port->slave == NULL) 131 return NULL; 132 133 return bond_get_bond_by_slave(port->slave); 134} 135 136/** 137 * __get_first_agg - get the first aggregator in the bond 138 * @port: the port we're looking at 139 * 140 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 141 * found. 142 * The caller must hold RCU or RTNL lock. 143 */ 144static inline struct aggregator *__get_first_agg(struct port *port) 145{ 146 struct bonding *bond = __get_bond_by_port(port); 147 struct slave *first_slave; 148 struct aggregator *agg; 149 150 /* If there's no bond for this port, or bond has no slaves */ 151 if (bond == NULL) 152 return NULL; 153 154 rcu_read_lock(); 155 first_slave = bond_first_slave_rcu(bond); 156 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 157 rcu_read_unlock(); 158 159 return agg; 160} 161 162/** 163 * __agg_has_partner - see if we have a partner 164 * @agg: the agregator we're looking at 165 * 166 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 167 * address for the partner). Return 0 if not. 168 */ 169static inline int __agg_has_partner(struct aggregator *agg) 170{ 171 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 172} 173 174/** 175 * __disable_port - disable the port's slave 176 * @port: the port we're looking at 177 */ 178static inline void __disable_port(struct port *port) 179{ 180 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 181} 182 183/** 184 * __enable_port - enable the port's slave, if it's up 185 * @port: the port we're looking at 186 */ 187static inline void __enable_port(struct port *port) 188{ 189 struct slave *slave = port->slave; 190 191 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 192 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 193} 194 195/** 196 * __port_is_enabled - check if the port's slave is in active state 197 * @port: the port we're looking at 198 */ 199static inline int __port_is_enabled(struct port *port) 200{ 201 return bond_is_active_slave(port->slave); 202} 203 204/** 205 * __get_agg_selection_mode - get the aggregator selection mode 206 * @port: the port we're looking at 207 * 208 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 209 */ 210static inline u32 __get_agg_selection_mode(struct port *port) 211{ 212 struct bonding *bond = __get_bond_by_port(port); 213 214 if (bond == NULL) 215 return BOND_AD_STABLE; 216 217 return bond->params.ad_select; 218} 219 220/** 221 * __check_agg_selection_timer - check if the selection timer has expired 222 * @port: the port we're looking at 223 */ 224static inline int __check_agg_selection_timer(struct port *port) 225{ 226 struct bonding *bond = __get_bond_by_port(port); 227 228 if (bond == NULL) 229 return 0; 230 231 return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0; 232} 233 234/** 235 * __get_link_speed - get a port's speed 236 * @port: the port we're looking at 237 * 238 * Return @port's speed in 802.3ad enum format. i.e. one of: 239 * 0, 240 * %AD_LINK_SPEED_10MBPS, 241 * %AD_LINK_SPEED_100MBPS, 242 * %AD_LINK_SPEED_1000MBPS, 243 * %AD_LINK_SPEED_2500MBPS, 244 * %AD_LINK_SPEED_5000MBPS, 245 * %AD_LINK_SPEED_10000MBPS 246 * %AD_LINK_SPEED_14000MBPS, 247 * %AD_LINK_SPEED_20000MBPS 248 * %AD_LINK_SPEED_25000MBPS 249 * %AD_LINK_SPEED_40000MBPS 250 * %AD_LINK_SPEED_50000MBPS 251 * %AD_LINK_SPEED_56000MBPS 252 * %AD_LINK_SPEED_100000MBPS 253 * %AD_LINK_SPEED_200000MBPS 254 * %AD_LINK_SPEED_400000MBPS 255 * %AD_LINK_SPEED_800000MBPS 256 */ 257static u16 __get_link_speed(struct port *port) 258{ 259 struct slave *slave = port->slave; 260 u16 speed; 261 262 /* this if covers only a special case: when the configuration starts 263 * with link down, it sets the speed to 0. 264 * This is done in spite of the fact that the e100 driver reports 0 265 * to be compatible with MVT in the future. 266 */ 267 if (slave->link != BOND_LINK_UP) 268 speed = 0; 269 else { 270 switch (slave->speed) { 271 case SPEED_10: 272 speed = AD_LINK_SPEED_10MBPS; 273 break; 274 275 case SPEED_100: 276 speed = AD_LINK_SPEED_100MBPS; 277 break; 278 279 case SPEED_1000: 280 speed = AD_LINK_SPEED_1000MBPS; 281 break; 282 283 case SPEED_2500: 284 speed = AD_LINK_SPEED_2500MBPS; 285 break; 286 287 case SPEED_5000: 288 speed = AD_LINK_SPEED_5000MBPS; 289 break; 290 291 case SPEED_10000: 292 speed = AD_LINK_SPEED_10000MBPS; 293 break; 294 295 case SPEED_14000: 296 speed = AD_LINK_SPEED_14000MBPS; 297 break; 298 299 case SPEED_20000: 300 speed = AD_LINK_SPEED_20000MBPS; 301 break; 302 303 case SPEED_25000: 304 speed = AD_LINK_SPEED_25000MBPS; 305 break; 306 307 case SPEED_40000: 308 speed = AD_LINK_SPEED_40000MBPS; 309 break; 310 311 case SPEED_50000: 312 speed = AD_LINK_SPEED_50000MBPS; 313 break; 314 315 case SPEED_56000: 316 speed = AD_LINK_SPEED_56000MBPS; 317 break; 318 319 case SPEED_100000: 320 speed = AD_LINK_SPEED_100000MBPS; 321 break; 322 323 case SPEED_200000: 324 speed = AD_LINK_SPEED_200000MBPS; 325 break; 326 327 case SPEED_400000: 328 speed = AD_LINK_SPEED_400000MBPS; 329 break; 330 331 case SPEED_800000: 332 speed = AD_LINK_SPEED_800000MBPS; 333 break; 334 335 default: 336 /* unknown speed value from ethtool. shouldn't happen */ 337 if (slave->speed != SPEED_UNKNOWN) 338 pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n", 339 slave->bond->dev->name, 340 slave->dev->name, slave->speed, 341 port->actor_port_number); 342 speed = 0; 343 break; 344 } 345 } 346 347 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n", 348 port->actor_port_number, speed); 349 return speed; 350} 351 352/** 353 * __get_duplex - get a port's duplex 354 * @port: the port we're looking at 355 * 356 * Return @port's duplex in 802.3ad bitmask format. i.e.: 357 * 0x01 if in full duplex 358 * 0x00 otherwise 359 */ 360static u8 __get_duplex(struct port *port) 361{ 362 struct slave *slave = port->slave; 363 u8 retval = 0x0; 364 365 /* handling a special case: when the configuration starts with 366 * link down, it sets the duplex to 0. 367 */ 368 if (slave->link == BOND_LINK_UP) { 369 switch (slave->duplex) { 370 case DUPLEX_FULL: 371 retval = 0x1; 372 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n", 373 port->actor_port_number); 374 break; 375 case DUPLEX_HALF: 376 default: 377 retval = 0x0; 378 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n", 379 port->actor_port_number); 380 break; 381 } 382 } 383 return retval; 384} 385 386static void __ad_actor_update_port(struct port *port) 387{ 388 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 389 390 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 391 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 392} 393 394/* Conversions */ 395 396/** 397 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 398 * @timer_type: which timer to operate 399 * @par: timer parameter. see below 400 * 401 * If @timer_type is %current_while_timer, @par indicates long/short timer. 402 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 403 * %SLOW_PERIODIC_TIME. 404 */ 405static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 406{ 407 u16 retval = 0; /* to silence the compiler */ 408 409 switch (timer_type) { 410 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 411 if (par) 412 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 413 else 414 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 415 break; 416 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 417 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 418 break; 419 case AD_PERIODIC_TIMER: /* for periodic machine */ 420 retval = (par*ad_ticks_per_sec); /* long timeout */ 421 break; 422 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 423 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 424 break; 425 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 426 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 427 break; 428 } 429 430 return retval; 431} 432 433 434/* ================= ad_rx_machine helper functions ================== */ 435 436/** 437 * __choose_matched - update a port's matched variable from a received lacpdu 438 * @lacpdu: the lacpdu we've received 439 * @port: the port we're looking at 440 * 441 * Update the value of the matched variable, using parameter values from a 442 * newly received lacpdu. Parameter values for the partner carried in the 443 * received PDU are compared with the corresponding operational parameter 444 * values for the actor. Matched is set to TRUE if all of these parameters 445 * match and the PDU parameter partner_state.aggregation has the same value as 446 * actor_oper_port_state.aggregation and lacp will actively maintain the link 447 * in the aggregation. Matched is also set to TRUE if the value of 448 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 449 * an individual link and lacp will actively maintain the link. Otherwise, 450 * matched is set to FALSE. LACP is considered to be actively maintaining the 451 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 452 * the actor's actor_oper_port_state.lacp_activity and the PDU's 453 * partner_state.lacp_activity variables are TRUE. 454 * 455 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 456 * used here to implement the language from 802.3ad 43.4.9 that requires 457 * recordPDU to "match" the LACPDU parameters to the stored values. 458 */ 459static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 460{ 461 /* check if all parameters are alike 462 * or this is individual link(aggregation == FALSE) 463 * then update the state machine Matched variable. 464 */ 465 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 466 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 467 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 468 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 469 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 470 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) || 471 ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0) 472 ) { 473 port->sm_vars |= AD_PORT_MATCHED; 474 } else { 475 port->sm_vars &= ~AD_PORT_MATCHED; 476 } 477} 478 479/** 480 * __record_pdu - record parameters from a received lacpdu 481 * @lacpdu: the lacpdu we've received 482 * @port: the port we're looking at 483 * 484 * Record the parameter values for the Actor carried in a received lacpdu as 485 * the current partner operational parameter values and sets 486 * actor_oper_port_state.defaulted to FALSE. 487 */ 488static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 489{ 490 if (lacpdu && port) { 491 struct port_params *partner = &port->partner_oper; 492 493 __choose_matched(lacpdu, port); 494 /* record the new parameter values for the partner 495 * operational 496 */ 497 partner->port_number = ntohs(lacpdu->actor_port); 498 partner->port_priority = ntohs(lacpdu->actor_port_priority); 499 partner->system = lacpdu->actor_system; 500 partner->system_priority = ntohs(lacpdu->actor_system_priority); 501 partner->key = ntohs(lacpdu->actor_key); 502 partner->port_state = lacpdu->actor_state; 503 504 /* set actor_oper_port_state.defaulted to FALSE */ 505 port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED; 506 507 /* set the partner sync. to on if the partner is sync, 508 * and the port is matched 509 */ 510 if ((port->sm_vars & AD_PORT_MATCHED) && 511 (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) { 512 partner->port_state |= LACP_STATE_SYNCHRONIZATION; 513 slave_dbg(port->slave->bond->dev, port->slave->dev, 514 "partner sync=1\n"); 515 } else { 516 partner->port_state &= ~LACP_STATE_SYNCHRONIZATION; 517 slave_dbg(port->slave->bond->dev, port->slave->dev, 518 "partner sync=0\n"); 519 } 520 } 521} 522 523/** 524 * __record_default - record default parameters 525 * @port: the port we're looking at 526 * 527 * This function records the default parameter values for the partner carried 528 * in the Partner Admin parameters as the current partner operational parameter 529 * values and sets actor_oper_port_state.defaulted to TRUE. 530 */ 531static void __record_default(struct port *port) 532{ 533 if (port) { 534 /* record the partner admin parameters */ 535 memcpy(&port->partner_oper, &port->partner_admin, 536 sizeof(struct port_params)); 537 538 /* set actor_oper_port_state.defaulted to true */ 539 port->actor_oper_port_state |= LACP_STATE_DEFAULTED; 540 } 541} 542 543/** 544 * __update_selected - update a port's Selected variable from a received lacpdu 545 * @lacpdu: the lacpdu we've received 546 * @port: the port we're looking at 547 * 548 * Update the value of the selected variable, using parameter values from a 549 * newly received lacpdu. The parameter values for the Actor carried in the 550 * received PDU are compared with the corresponding operational parameter 551 * values for the ports partner. If one or more of the comparisons shows that 552 * the value(s) received in the PDU differ from the current operational values, 553 * then selected is set to FALSE and actor_oper_port_state.synchronization is 554 * set to out_of_sync. Otherwise, selected remains unchanged. 555 */ 556static void __update_selected(struct lacpdu *lacpdu, struct port *port) 557{ 558 if (lacpdu && port) { 559 const struct port_params *partner = &port->partner_oper; 560 561 /* check if any parameter is different then 562 * update the state machine selected variable. 563 */ 564 if (ntohs(lacpdu->actor_port) != partner->port_number || 565 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 566 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 567 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 568 ntohs(lacpdu->actor_key) != partner->key || 569 (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) { 570 port->sm_vars &= ~AD_PORT_SELECTED; 571 } 572 } 573} 574 575/** 576 * __update_default_selected - update a port's Selected variable from Partner 577 * @port: the port we're looking at 578 * 579 * This function updates the value of the selected variable, using the partner 580 * administrative parameter values. The administrative values are compared with 581 * the corresponding operational parameter values for the partner. If one or 582 * more of the comparisons shows that the administrative value(s) differ from 583 * the current operational values, then Selected is set to FALSE and 584 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 585 * Selected remains unchanged. 586 */ 587static void __update_default_selected(struct port *port) 588{ 589 if (port) { 590 const struct port_params *admin = &port->partner_admin; 591 const struct port_params *oper = &port->partner_oper; 592 593 /* check if any parameter is different then 594 * update the state machine selected variable. 595 */ 596 if (admin->port_number != oper->port_number || 597 admin->port_priority != oper->port_priority || 598 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 599 admin->system_priority != oper->system_priority || 600 admin->key != oper->key || 601 (admin->port_state & LACP_STATE_AGGREGATION) 602 != (oper->port_state & LACP_STATE_AGGREGATION)) { 603 port->sm_vars &= ~AD_PORT_SELECTED; 604 } 605 } 606} 607 608/** 609 * __update_ntt - update a port's ntt variable from a received lacpdu 610 * @lacpdu: the lacpdu we've received 611 * @port: the port we're looking at 612 * 613 * Updates the value of the ntt variable, using parameter values from a newly 614 * received lacpdu. The parameter values for the partner carried in the 615 * received PDU are compared with the corresponding operational parameter 616 * values for the Actor. If one or more of the comparisons shows that the 617 * value(s) received in the PDU differ from the current operational values, 618 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 619 */ 620static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 621{ 622 /* validate lacpdu and port */ 623 if (lacpdu && port) { 624 /* check if any parameter is different then 625 * update the port->ntt. 626 */ 627 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 628 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 629 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 630 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 631 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 632 ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) || 633 ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) || 634 ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) || 635 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION)) 636 ) { 637 port->ntt = true; 638 } 639 } 640} 641 642/** 643 * __agg_ports_are_ready - check if all ports in an aggregator are ready 644 * @aggregator: the aggregator we're looking at 645 * 646 */ 647static int __agg_ports_are_ready(struct aggregator *aggregator) 648{ 649 struct port *port; 650 int retval = 1; 651 652 if (aggregator) { 653 /* scan all ports in this aggregator to verfy if they are 654 * all ready. 655 */ 656 for (port = aggregator->lag_ports; 657 port; 658 port = port->next_port_in_aggregator) { 659 if (!(port->sm_vars & AD_PORT_READY_N)) { 660 retval = 0; 661 break; 662 } 663 } 664 } 665 666 return retval; 667} 668 669/** 670 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 671 * @aggregator: the aggregator we're looking at 672 * @val: Should the ports' ready bit be set on or off 673 * 674 */ 675static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 676{ 677 struct port *port; 678 679 for (port = aggregator->lag_ports; port; 680 port = port->next_port_in_aggregator) { 681 if (val) 682 port->sm_vars |= AD_PORT_READY; 683 else 684 port->sm_vars &= ~AD_PORT_READY; 685 } 686} 687 688static int __agg_active_ports(struct aggregator *agg) 689{ 690 struct port *port; 691 int active = 0; 692 693 for (port = agg->lag_ports; port; 694 port = port->next_port_in_aggregator) { 695 if (port->is_enabled) 696 active++; 697 } 698 699 return active; 700} 701 702/** 703 * __get_agg_bandwidth - get the total bandwidth of an aggregator 704 * @aggregator: the aggregator we're looking at 705 * 706 */ 707static u32 __get_agg_bandwidth(struct aggregator *aggregator) 708{ 709 int nports = __agg_active_ports(aggregator); 710 u32 bandwidth = 0; 711 712 if (nports) { 713 switch (__get_link_speed(aggregator->lag_ports)) { 714 case AD_LINK_SPEED_1MBPS: 715 bandwidth = nports; 716 break; 717 case AD_LINK_SPEED_10MBPS: 718 bandwidth = nports * 10; 719 break; 720 case AD_LINK_SPEED_100MBPS: 721 bandwidth = nports * 100; 722 break; 723 case AD_LINK_SPEED_1000MBPS: 724 bandwidth = nports * 1000; 725 break; 726 case AD_LINK_SPEED_2500MBPS: 727 bandwidth = nports * 2500; 728 break; 729 case AD_LINK_SPEED_5000MBPS: 730 bandwidth = nports * 5000; 731 break; 732 case AD_LINK_SPEED_10000MBPS: 733 bandwidth = nports * 10000; 734 break; 735 case AD_LINK_SPEED_14000MBPS: 736 bandwidth = nports * 14000; 737 break; 738 case AD_LINK_SPEED_20000MBPS: 739 bandwidth = nports * 20000; 740 break; 741 case AD_LINK_SPEED_25000MBPS: 742 bandwidth = nports * 25000; 743 break; 744 case AD_LINK_SPEED_40000MBPS: 745 bandwidth = nports * 40000; 746 break; 747 case AD_LINK_SPEED_50000MBPS: 748 bandwidth = nports * 50000; 749 break; 750 case AD_LINK_SPEED_56000MBPS: 751 bandwidth = nports * 56000; 752 break; 753 case AD_LINK_SPEED_100000MBPS: 754 bandwidth = nports * 100000; 755 break; 756 case AD_LINK_SPEED_200000MBPS: 757 bandwidth = nports * 200000; 758 break; 759 case AD_LINK_SPEED_400000MBPS: 760 bandwidth = nports * 400000; 761 break; 762 case AD_LINK_SPEED_800000MBPS: 763 bandwidth = nports * 800000; 764 break; 765 default: 766 bandwidth = 0; /* to silence the compiler */ 767 } 768 } 769 return bandwidth; 770} 771 772/** 773 * __get_active_agg - get the current active aggregator 774 * @aggregator: the aggregator we're looking at 775 * 776 * Caller must hold RCU lock. 777 */ 778static struct aggregator *__get_active_agg(struct aggregator *aggregator) 779{ 780 struct bonding *bond = aggregator->slave->bond; 781 struct list_head *iter; 782 struct slave *slave; 783 784 bond_for_each_slave_rcu(bond, slave, iter) 785 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 786 return &(SLAVE_AD_INFO(slave)->aggregator); 787 788 return NULL; 789} 790 791/** 792 * __update_lacpdu_from_port - update a port's lacpdu fields 793 * @port: the port we're looking at 794 */ 795static inline void __update_lacpdu_from_port(struct port *port) 796{ 797 struct lacpdu *lacpdu = &port->lacpdu; 798 const struct port_params *partner = &port->partner_oper; 799 800 /* update current actual Actor parameters 801 * lacpdu->subtype initialized 802 * lacpdu->version_number initialized 803 * lacpdu->tlv_type_actor_info initialized 804 * lacpdu->actor_information_length initialized 805 */ 806 807 lacpdu->actor_system_priority = htons(port->actor_system_priority); 808 lacpdu->actor_system = port->actor_system; 809 lacpdu->actor_key = htons(port->actor_oper_port_key); 810 lacpdu->actor_port_priority = htons(port->actor_port_priority); 811 lacpdu->actor_port = htons(port->actor_port_number); 812 lacpdu->actor_state = port->actor_oper_port_state; 813 slave_dbg(port->slave->bond->dev, port->slave->dev, 814 "update lacpdu: actor port state %x\n", 815 port->actor_oper_port_state); 816 817 /* lacpdu->reserved_3_1 initialized 818 * lacpdu->tlv_type_partner_info initialized 819 * lacpdu->partner_information_length initialized 820 */ 821 822 lacpdu->partner_system_priority = htons(partner->system_priority); 823 lacpdu->partner_system = partner->system; 824 lacpdu->partner_key = htons(partner->key); 825 lacpdu->partner_port_priority = htons(partner->port_priority); 826 lacpdu->partner_port = htons(partner->port_number); 827 lacpdu->partner_state = partner->port_state; 828 829 /* lacpdu->reserved_3_2 initialized 830 * lacpdu->tlv_type_collector_info initialized 831 * lacpdu->collector_information_length initialized 832 * collector_max_delay initialized 833 * reserved_12[12] initialized 834 * tlv_type_terminator initialized 835 * terminator_length initialized 836 * reserved_50[50] initialized 837 */ 838} 839 840/* ================= main 802.3ad protocol code ========================= */ 841 842/** 843 * ad_lacpdu_send - send out a lacpdu packet on a given port 844 * @port: the port we're looking at 845 * 846 * Returns: 0 on success 847 * < 0 on error 848 */ 849static int ad_lacpdu_send(struct port *port) 850{ 851 struct slave *slave = port->slave; 852 struct sk_buff *skb; 853 struct lacpdu_header *lacpdu_header; 854 int length = sizeof(struct lacpdu_header); 855 856 skb = dev_alloc_skb(length); 857 if (!skb) 858 return -ENOMEM; 859 860 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx); 861 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx); 862 863 skb->dev = slave->dev; 864 skb_reset_mac_header(skb); 865 skb->network_header = skb->mac_header + ETH_HLEN; 866 skb->protocol = PKT_TYPE_LACPDU; 867 skb->priority = TC_PRIO_CONTROL; 868 869 lacpdu_header = skb_put(skb, length); 870 871 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 872 /* Note: source address is set to be the member's PERMANENT address, 873 * because we use it to identify loopback lacpdus in receive. 874 */ 875 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 876 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 877 878 lacpdu_header->lacpdu = port->lacpdu; 879 880 dev_queue_xmit(skb); 881 882 return 0; 883} 884 885/** 886 * ad_marker_send - send marker information/response on a given port 887 * @port: the port we're looking at 888 * @marker: marker data to send 889 * 890 * Returns: 0 on success 891 * < 0 on error 892 */ 893static int ad_marker_send(struct port *port, struct bond_marker *marker) 894{ 895 struct slave *slave = port->slave; 896 struct sk_buff *skb; 897 struct bond_marker_header *marker_header; 898 int length = sizeof(struct bond_marker_header); 899 900 skb = dev_alloc_skb(length + 16); 901 if (!skb) 902 return -ENOMEM; 903 904 switch (marker->tlv_type) { 905 case AD_MARKER_INFORMATION_SUBTYPE: 906 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx); 907 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx); 908 break; 909 case AD_MARKER_RESPONSE_SUBTYPE: 910 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx); 911 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx); 912 break; 913 } 914 915 skb_reserve(skb, 16); 916 917 skb->dev = slave->dev; 918 skb_reset_mac_header(skb); 919 skb->network_header = skb->mac_header + ETH_HLEN; 920 skb->protocol = PKT_TYPE_LACPDU; 921 922 marker_header = skb_put(skb, length); 923 924 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 925 /* Note: source address is set to be the member's PERMANENT address, 926 * because we use it to identify loopback MARKERs in receive. 927 */ 928 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 929 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 930 931 marker_header->marker = *marker; 932 933 dev_queue_xmit(skb); 934 935 return 0; 936} 937 938/** 939 * ad_mux_machine - handle a port's mux state machine 940 * @port: the port we're looking at 941 * @update_slave_arr: Does slave array need update? 942 */ 943static void ad_mux_machine(struct port *port, bool *update_slave_arr) 944{ 945 mux_states_t last_state; 946 947 /* keep current State Machine state to compare later if it was 948 * changed 949 */ 950 last_state = port->sm_mux_state; 951 952 if (port->sm_vars & AD_PORT_BEGIN) { 953 port->sm_mux_state = AD_MUX_DETACHED; 954 } else { 955 switch (port->sm_mux_state) { 956 case AD_MUX_DETACHED: 957 if ((port->sm_vars & AD_PORT_SELECTED) 958 || (port->sm_vars & AD_PORT_STANDBY)) 959 /* if SELECTED or STANDBY */ 960 port->sm_mux_state = AD_MUX_WAITING; 961 break; 962 case AD_MUX_WAITING: 963 /* if SELECTED == FALSE return to DETACH state */ 964 if (!(port->sm_vars & AD_PORT_SELECTED)) { 965 port->sm_vars &= ~AD_PORT_READY_N; 966 /* in order to withhold the Selection Logic to 967 * check all ports READY_N value every callback 968 * cycle to update ready variable, we check 969 * READY_N and update READY here 970 */ 971 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 972 port->sm_mux_state = AD_MUX_DETACHED; 973 break; 974 } 975 976 /* check if the wait_while_timer expired */ 977 if (port->sm_mux_timer_counter 978 && !(--port->sm_mux_timer_counter)) 979 port->sm_vars |= AD_PORT_READY_N; 980 981 /* in order to withhold the selection logic to check 982 * all ports READY_N value every callback cycle to 983 * update ready variable, we check READY_N and update 984 * READY here 985 */ 986 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 987 988 /* if the wait_while_timer expired, and the port is 989 * in READY state, move to ATTACHED state 990 */ 991 if ((port->sm_vars & AD_PORT_READY) 992 && !port->sm_mux_timer_counter) 993 port->sm_mux_state = AD_MUX_ATTACHED; 994 break; 995 case AD_MUX_ATTACHED: 996 /* check also if agg_select_timer expired (so the 997 * edable port will take place only after this timer) 998 */ 999 if ((port->sm_vars & AD_PORT_SELECTED) && 1000 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) && 1001 !__check_agg_selection_timer(port)) { 1002 if (port->aggregator->is_active) 1003 port->sm_mux_state = 1004 AD_MUX_COLLECTING_DISTRIBUTING; 1005 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 1006 (port->sm_vars & AD_PORT_STANDBY)) { 1007 /* if UNSELECTED or STANDBY */ 1008 port->sm_vars &= ~AD_PORT_READY_N; 1009 /* in order to withhold the selection logic to 1010 * check all ports READY_N value every callback 1011 * cycle to update ready variable, we check 1012 * READY_N and update READY here 1013 */ 1014 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1015 port->sm_mux_state = AD_MUX_DETACHED; 1016 } else if (port->aggregator->is_active) { 1017 port->actor_oper_port_state |= 1018 LACP_STATE_SYNCHRONIZATION; 1019 } 1020 break; 1021 case AD_MUX_COLLECTING_DISTRIBUTING: 1022 if (!(port->sm_vars & AD_PORT_SELECTED) || 1023 (port->sm_vars & AD_PORT_STANDBY) || 1024 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) || 1025 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) { 1026 port->sm_mux_state = AD_MUX_ATTACHED; 1027 } else { 1028 /* if port state hasn't changed make 1029 * sure that a collecting distributing 1030 * port in an active aggregator is enabled 1031 */ 1032 if (port->aggregator && 1033 port->aggregator->is_active && 1034 !__port_is_enabled(port)) { 1035 __enable_port(port); 1036 *update_slave_arr = true; 1037 } 1038 } 1039 break; 1040 default: 1041 break; 1042 } 1043 } 1044 1045 /* check if the state machine was changed */ 1046 if (port->sm_mux_state != last_state) { 1047 slave_dbg(port->slave->bond->dev, port->slave->dev, 1048 "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", 1049 port->actor_port_number, 1050 last_state, 1051 port->sm_mux_state); 1052 switch (port->sm_mux_state) { 1053 case AD_MUX_DETACHED: 1054 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 1055 ad_disable_collecting_distributing(port, 1056 update_slave_arr); 1057 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 1058 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1059 port->ntt = true; 1060 break; 1061 case AD_MUX_WAITING: 1062 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1063 break; 1064 case AD_MUX_ATTACHED: 1065 if (port->aggregator->is_active) 1066 port->actor_oper_port_state |= 1067 LACP_STATE_SYNCHRONIZATION; 1068 else 1069 port->actor_oper_port_state &= 1070 ~LACP_STATE_SYNCHRONIZATION; 1071 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 1072 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1073 ad_disable_collecting_distributing(port, 1074 update_slave_arr); 1075 port->ntt = true; 1076 break; 1077 case AD_MUX_COLLECTING_DISTRIBUTING: 1078 port->actor_oper_port_state |= LACP_STATE_COLLECTING; 1079 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING; 1080 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION; 1081 ad_enable_collecting_distributing(port, 1082 update_slave_arr); 1083 port->ntt = true; 1084 break; 1085 default: 1086 break; 1087 } 1088 } 1089} 1090 1091/** 1092 * ad_rx_machine - handle a port's rx State Machine 1093 * @lacpdu: the lacpdu we've received 1094 * @port: the port we're looking at 1095 * 1096 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1097 * CURRENT. If timer expired set the state machine in the proper state. 1098 * In other cases, this function checks if we need to switch to other state. 1099 */ 1100static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1101{ 1102 rx_states_t last_state; 1103 1104 /* keep current State Machine state to compare later if it was 1105 * changed 1106 */ 1107 last_state = port->sm_rx_state; 1108 1109 if (lacpdu) { 1110 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx); 1111 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx); 1112 } 1113 /* check if state machine should change state */ 1114 1115 /* first, check if port was reinitialized */ 1116 if (port->sm_vars & AD_PORT_BEGIN) { 1117 port->sm_rx_state = AD_RX_INITIALIZE; 1118 port->sm_vars |= AD_PORT_CHURNED; 1119 /* check if port is not enabled */ 1120 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) 1121 port->sm_rx_state = AD_RX_PORT_DISABLED; 1122 /* check if new lacpdu arrived */ 1123 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1124 (port->sm_rx_state == AD_RX_DEFAULTED) || 1125 (port->sm_rx_state == AD_RX_CURRENT))) { 1126 if (port->sm_rx_state != AD_RX_CURRENT) 1127 port->sm_vars |= AD_PORT_CHURNED; 1128 port->sm_rx_timer_counter = 0; 1129 port->sm_rx_state = AD_RX_CURRENT; 1130 } else { 1131 /* if timer is on, and if it is expired */ 1132 if (port->sm_rx_timer_counter && 1133 !(--port->sm_rx_timer_counter)) { 1134 switch (port->sm_rx_state) { 1135 case AD_RX_EXPIRED: 1136 port->sm_rx_state = AD_RX_DEFAULTED; 1137 break; 1138 case AD_RX_CURRENT: 1139 port->sm_rx_state = AD_RX_EXPIRED; 1140 break; 1141 default: 1142 break; 1143 } 1144 } else { 1145 /* if no lacpdu arrived and no timer is on */ 1146 switch (port->sm_rx_state) { 1147 case AD_RX_PORT_DISABLED: 1148 if (port->is_enabled && 1149 (port->sm_vars & AD_PORT_LACP_ENABLED)) 1150 port->sm_rx_state = AD_RX_EXPIRED; 1151 else if (port->is_enabled 1152 && ((port->sm_vars 1153 & AD_PORT_LACP_ENABLED) == 0)) 1154 port->sm_rx_state = AD_RX_LACP_DISABLED; 1155 break; 1156 default: 1157 break; 1158 1159 } 1160 } 1161 } 1162 1163 /* check if the State machine was changed or new lacpdu arrived */ 1164 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1165 slave_dbg(port->slave->bond->dev, port->slave->dev, 1166 "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", 1167 port->actor_port_number, 1168 last_state, 1169 port->sm_rx_state); 1170 switch (port->sm_rx_state) { 1171 case AD_RX_INITIALIZE: 1172 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1173 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1174 else 1175 port->sm_vars |= AD_PORT_LACP_ENABLED; 1176 port->sm_vars &= ~AD_PORT_SELECTED; 1177 __record_default(port); 1178 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1179 port->sm_rx_state = AD_RX_PORT_DISABLED; 1180 1181 fallthrough; 1182 case AD_RX_PORT_DISABLED: 1183 port->sm_vars &= ~AD_PORT_MATCHED; 1184 break; 1185 case AD_RX_LACP_DISABLED: 1186 port->sm_vars &= ~AD_PORT_SELECTED; 1187 __record_default(port); 1188 port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION; 1189 port->sm_vars |= AD_PORT_MATCHED; 1190 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1191 break; 1192 case AD_RX_EXPIRED: 1193 /* Reset of the Synchronization flag (Standard 43.4.12) 1194 * This reset cause to disable this port in the 1195 * COLLECTING_DISTRIBUTING state of the mux machine in 1196 * case of EXPIRED even if LINK_DOWN didn't arrive for 1197 * the port. 1198 */ 1199 port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION; 1200 port->sm_vars &= ~AD_PORT_MATCHED; 1201 port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT; 1202 port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY; 1203 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1204 port->actor_oper_port_state |= LACP_STATE_EXPIRED; 1205 port->sm_vars |= AD_PORT_CHURNED; 1206 break; 1207 case AD_RX_DEFAULTED: 1208 __update_default_selected(port); 1209 __record_default(port); 1210 port->sm_vars |= AD_PORT_MATCHED; 1211 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1212 break; 1213 case AD_RX_CURRENT: 1214 /* detect loopback situation */ 1215 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1216 &(port->actor_system))) { 1217 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n" 1218 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n"); 1219 return; 1220 } 1221 __update_selected(lacpdu, port); 1222 __update_ntt(lacpdu, port); 1223 __record_pdu(lacpdu, port); 1224 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)); 1225 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1226 break; 1227 default: 1228 break; 1229 } 1230 } 1231} 1232 1233/** 1234 * ad_churn_machine - handle port churn's state machine 1235 * @port: the port we're looking at 1236 * 1237 */ 1238static void ad_churn_machine(struct port *port) 1239{ 1240 if (port->sm_vars & AD_PORT_CHURNED) { 1241 port->sm_vars &= ~AD_PORT_CHURNED; 1242 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1243 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1244 port->sm_churn_actor_timer_counter = 1245 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1246 port->sm_churn_partner_timer_counter = 1247 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1248 return; 1249 } 1250 if (port->sm_churn_actor_timer_counter && 1251 !(--port->sm_churn_actor_timer_counter) && 1252 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1253 if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) { 1254 port->sm_churn_actor_state = AD_NO_CHURN; 1255 } else { 1256 port->churn_actor_count++; 1257 port->sm_churn_actor_state = AD_CHURN; 1258 } 1259 } 1260 if (port->sm_churn_partner_timer_counter && 1261 !(--port->sm_churn_partner_timer_counter) && 1262 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1263 if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) { 1264 port->sm_churn_partner_state = AD_NO_CHURN; 1265 } else { 1266 port->churn_partner_count++; 1267 port->sm_churn_partner_state = AD_CHURN; 1268 } 1269 } 1270} 1271 1272/** 1273 * ad_tx_machine - handle a port's tx state machine 1274 * @port: the port we're looking at 1275 */ 1276static void ad_tx_machine(struct port *port) 1277{ 1278 /* check if tx timer expired, to verify that we do not send more than 1279 * 3 packets per second 1280 */ 1281 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1282 /* check if there is something to send */ 1283 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1284 __update_lacpdu_from_port(port); 1285 1286 if (ad_lacpdu_send(port) >= 0) { 1287 slave_dbg(port->slave->bond->dev, 1288 port->slave->dev, 1289 "Sent LACPDU on port %d\n", 1290 port->actor_port_number); 1291 1292 /* mark ntt as false, so it will not be sent 1293 * again until demanded 1294 */ 1295 port->ntt = false; 1296 } 1297 } 1298 /* restart tx timer(to verify that we will not exceed 1299 * AD_MAX_TX_IN_SECOND 1300 */ 1301 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1302 } 1303} 1304 1305/** 1306 * ad_periodic_machine - handle a port's periodic state machine 1307 * @port: the port we're looking at 1308 * @bond_params: bond parameters we will use 1309 * 1310 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1311 */ 1312static void ad_periodic_machine(struct port *port, struct bond_params *bond_params) 1313{ 1314 periodic_states_t last_state; 1315 1316 /* keep current state machine state to compare later if it was changed */ 1317 last_state = port->sm_periodic_state; 1318 1319 /* check if port was reinitialized */ 1320 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1321 (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) || 1322 !bond_params->lacp_active) { 1323 port->sm_periodic_state = AD_NO_PERIODIC; 1324 } 1325 /* check if state machine should change state */ 1326 else if (port->sm_periodic_timer_counter) { 1327 /* check if periodic state machine expired */ 1328 if (!(--port->sm_periodic_timer_counter)) { 1329 /* if expired then do tx */ 1330 port->sm_periodic_state = AD_PERIODIC_TX; 1331 } else { 1332 /* If not expired, check if there is some new timeout 1333 * parameter from the partner state 1334 */ 1335 switch (port->sm_periodic_state) { 1336 case AD_FAST_PERIODIC: 1337 if (!(port->partner_oper.port_state 1338 & LACP_STATE_LACP_TIMEOUT)) 1339 port->sm_periodic_state = AD_SLOW_PERIODIC; 1340 break; 1341 case AD_SLOW_PERIODIC: 1342 if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) { 1343 port->sm_periodic_timer_counter = 0; 1344 port->sm_periodic_state = AD_PERIODIC_TX; 1345 } 1346 break; 1347 default: 1348 break; 1349 } 1350 } 1351 } else { 1352 switch (port->sm_periodic_state) { 1353 case AD_NO_PERIODIC: 1354 port->sm_periodic_state = AD_FAST_PERIODIC; 1355 break; 1356 case AD_PERIODIC_TX: 1357 if (!(port->partner_oper.port_state & 1358 LACP_STATE_LACP_TIMEOUT)) 1359 port->sm_periodic_state = AD_SLOW_PERIODIC; 1360 else 1361 port->sm_periodic_state = AD_FAST_PERIODIC; 1362 break; 1363 default: 1364 break; 1365 } 1366 } 1367 1368 /* check if the state machine was changed */ 1369 if (port->sm_periodic_state != last_state) { 1370 slave_dbg(port->slave->bond->dev, port->slave->dev, 1371 "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1372 port->actor_port_number, last_state, 1373 port->sm_periodic_state); 1374 switch (port->sm_periodic_state) { 1375 case AD_NO_PERIODIC: 1376 port->sm_periodic_timer_counter = 0; 1377 break; 1378 case AD_FAST_PERIODIC: 1379 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1380 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1381 break; 1382 case AD_SLOW_PERIODIC: 1383 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1384 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1385 break; 1386 case AD_PERIODIC_TX: 1387 port->ntt = true; 1388 break; 1389 default: 1390 break; 1391 } 1392 } 1393} 1394 1395/** 1396 * ad_port_selection_logic - select aggregation groups 1397 * @port: the port we're looking at 1398 * @update_slave_arr: Does slave array need update? 1399 * 1400 * Select aggregation groups, and assign each port for it's aggregetor. The 1401 * selection logic is called in the inititalization (after all the handshkes), 1402 * and after every lacpdu receive (if selected is off). 1403 */ 1404static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1405{ 1406 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1407 struct port *last_port = NULL, *curr_port; 1408 struct list_head *iter; 1409 struct bonding *bond; 1410 struct slave *slave; 1411 int found = 0; 1412 1413 /* if the port is already Selected, do nothing */ 1414 if (port->sm_vars & AD_PORT_SELECTED) 1415 return; 1416 1417 bond = __get_bond_by_port(port); 1418 1419 /* if the port is connected to other aggregator, detach it */ 1420 if (port->aggregator) { 1421 /* detach the port from its former aggregator */ 1422 temp_aggregator = port->aggregator; 1423 for (curr_port = temp_aggregator->lag_ports; curr_port; 1424 last_port = curr_port, 1425 curr_port = curr_port->next_port_in_aggregator) { 1426 if (curr_port == port) { 1427 temp_aggregator->num_of_ports--; 1428 /* if it is the first port attached to the 1429 * aggregator 1430 */ 1431 if (!last_port) { 1432 temp_aggregator->lag_ports = 1433 port->next_port_in_aggregator; 1434 } else { 1435 /* not the first port attached to the 1436 * aggregator 1437 */ 1438 last_port->next_port_in_aggregator = 1439 port->next_port_in_aggregator; 1440 } 1441 1442 /* clear the port's relations to this 1443 * aggregator 1444 */ 1445 port->aggregator = NULL; 1446 port->next_port_in_aggregator = NULL; 1447 port->actor_port_aggregator_identifier = 0; 1448 1449 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n", 1450 port->actor_port_number, 1451 temp_aggregator->aggregator_identifier); 1452 /* if the aggregator is empty, clear its 1453 * parameters, and set it ready to be attached 1454 */ 1455 if (!temp_aggregator->lag_ports) 1456 ad_clear_agg(temp_aggregator); 1457 break; 1458 } 1459 } 1460 if (!curr_port) { 1461 /* meaning: the port was related to an aggregator 1462 * but was not on the aggregator port list 1463 */ 1464 net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n", 1465 port->slave->bond->dev->name, 1466 port->slave->dev->name, 1467 port->actor_port_number, 1468 port->aggregator->aggregator_identifier); 1469 } 1470 } 1471 /* search on all aggregators for a suitable aggregator for this port */ 1472 bond_for_each_slave(bond, slave, iter) { 1473 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1474 1475 /* keep a free aggregator for later use(if needed) */ 1476 if (!aggregator->lag_ports) { 1477 if (!free_aggregator) 1478 free_aggregator = aggregator; 1479 continue; 1480 } 1481 /* check if current aggregator suits us */ 1482 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1483 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1484 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1485 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1486 ) && 1487 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1488 !aggregator->is_individual) /* but is not individual OR */ 1489 ) 1490 ) { 1491 /* attach to the founded aggregator */ 1492 port->aggregator = aggregator; 1493 port->actor_port_aggregator_identifier = 1494 port->aggregator->aggregator_identifier; 1495 port->next_port_in_aggregator = aggregator->lag_ports; 1496 port->aggregator->num_of_ports++; 1497 aggregator->lag_ports = port; 1498 slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n", 1499 port->actor_port_number, 1500 port->aggregator->aggregator_identifier); 1501 1502 /* mark this port as selected */ 1503 port->sm_vars |= AD_PORT_SELECTED; 1504 found = 1; 1505 break; 1506 } 1507 } 1508 1509 /* the port couldn't find an aggregator - attach it to a new 1510 * aggregator 1511 */ 1512 if (!found) { 1513 if (free_aggregator) { 1514 /* assign port a new aggregator */ 1515 port->aggregator = free_aggregator; 1516 port->actor_port_aggregator_identifier = 1517 port->aggregator->aggregator_identifier; 1518 1519 /* update the new aggregator's parameters 1520 * if port was responsed from the end-user 1521 */ 1522 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1523 /* if port is full duplex */ 1524 port->aggregator->is_individual = false; 1525 else 1526 port->aggregator->is_individual = true; 1527 1528 port->aggregator->actor_admin_aggregator_key = 1529 port->actor_admin_port_key; 1530 port->aggregator->actor_oper_aggregator_key = 1531 port->actor_oper_port_key; 1532 port->aggregator->partner_system = 1533 port->partner_oper.system; 1534 port->aggregator->partner_system_priority = 1535 port->partner_oper.system_priority; 1536 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1537 port->aggregator->receive_state = 1; 1538 port->aggregator->transmit_state = 1; 1539 port->aggregator->lag_ports = port; 1540 port->aggregator->num_of_ports++; 1541 1542 /* mark this port as selected */ 1543 port->sm_vars |= AD_PORT_SELECTED; 1544 1545 slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n", 1546 port->actor_port_number, 1547 port->aggregator->aggregator_identifier); 1548 } else { 1549 slave_err(bond->dev, port->slave->dev, 1550 "Port %d did not find a suitable aggregator\n", 1551 port->actor_port_number); 1552 return; 1553 } 1554 } 1555 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1556 * in all aggregator's ports, else set ready=FALSE in all 1557 * aggregator's ports 1558 */ 1559 __set_agg_ports_ready(port->aggregator, 1560 __agg_ports_are_ready(port->aggregator)); 1561 1562 aggregator = __get_first_agg(port); 1563 ad_agg_selection_logic(aggregator, update_slave_arr); 1564 1565 if (!port->aggregator->is_active) 1566 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 1567} 1568 1569/* Decide if "agg" is a better choice for the new active aggregator that 1570 * the current best, according to the ad_select policy. 1571 */ 1572static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1573 struct aggregator *curr) 1574{ 1575 /* 0. If no best, select current. 1576 * 1577 * 1. If the current agg is not individual, and the best is 1578 * individual, select current. 1579 * 1580 * 2. If current agg is individual and the best is not, keep best. 1581 * 1582 * 3. Therefore, current and best are both individual or both not 1583 * individual, so: 1584 * 1585 * 3a. If current agg partner replied, and best agg partner did not, 1586 * select current. 1587 * 1588 * 3b. If current agg partner did not reply and best agg partner 1589 * did reply, keep best. 1590 * 1591 * 4. Therefore, current and best both have partner replies or 1592 * both do not, so perform selection policy: 1593 * 1594 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1595 * select by bandwidth. 1596 * 1597 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1598 */ 1599 if (!best) 1600 return curr; 1601 1602 if (!curr->is_individual && best->is_individual) 1603 return curr; 1604 1605 if (curr->is_individual && !best->is_individual) 1606 return best; 1607 1608 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1609 return curr; 1610 1611 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1612 return best; 1613 1614 switch (__get_agg_selection_mode(curr->lag_ports)) { 1615 case BOND_AD_COUNT: 1616 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1617 return curr; 1618 1619 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1620 return best; 1621 1622 fallthrough; 1623 case BOND_AD_STABLE: 1624 case BOND_AD_BANDWIDTH: 1625 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1626 return curr; 1627 1628 break; 1629 1630 default: 1631 net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n", 1632 curr->slave->bond->dev->name, 1633 curr->slave->dev->name, 1634 __get_agg_selection_mode(curr->lag_ports)); 1635 break; 1636 } 1637 1638 return best; 1639} 1640 1641static int agg_device_up(const struct aggregator *agg) 1642{ 1643 struct port *port = agg->lag_ports; 1644 1645 if (!port) 1646 return 0; 1647 1648 for (port = agg->lag_ports; port; 1649 port = port->next_port_in_aggregator) { 1650 if (netif_running(port->slave->dev) && 1651 netif_carrier_ok(port->slave->dev)) 1652 return 1; 1653 } 1654 1655 return 0; 1656} 1657 1658/** 1659 * ad_agg_selection_logic - select an aggregation group for a team 1660 * @agg: the aggregator we're looking at 1661 * @update_slave_arr: Does slave array need update? 1662 * 1663 * It is assumed that only one aggregator may be selected for a team. 1664 * 1665 * The logic of this function is to select the aggregator according to 1666 * the ad_select policy: 1667 * 1668 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1669 * it, and to reselect the active aggregator only if the previous 1670 * aggregator has no more ports related to it. 1671 * 1672 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1673 * bandwidth, and reselect whenever a link state change takes place or the 1674 * set of slaves in the bond changes. 1675 * 1676 * BOND_AD_COUNT: select the aggregator with largest number of ports 1677 * (slaves), and reselect whenever a link state change takes place or the 1678 * set of slaves in the bond changes. 1679 * 1680 * FIXME: this function MUST be called with the first agg in the bond, or 1681 * __get_active_agg() won't work correctly. This function should be better 1682 * called with the bond itself, and retrieve the first agg from it. 1683 */ 1684static void ad_agg_selection_logic(struct aggregator *agg, 1685 bool *update_slave_arr) 1686{ 1687 struct aggregator *best, *active, *origin; 1688 struct bonding *bond = agg->slave->bond; 1689 struct list_head *iter; 1690 struct slave *slave; 1691 struct port *port; 1692 1693 rcu_read_lock(); 1694 origin = agg; 1695 active = __get_active_agg(agg); 1696 best = (active && agg_device_up(active)) ? active : NULL; 1697 1698 bond_for_each_slave_rcu(bond, slave, iter) { 1699 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1700 1701 agg->is_active = 0; 1702 1703 if (__agg_active_ports(agg) && agg_device_up(agg)) 1704 best = ad_agg_selection_test(best, agg); 1705 } 1706 1707 if (best && 1708 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1709 /* For the STABLE policy, don't replace the old active 1710 * aggregator if it's still active (it has an answering 1711 * partner) or if both the best and active don't have an 1712 * answering partner. 1713 */ 1714 if (active && active->lag_ports && 1715 __agg_active_ports(active) && 1716 (__agg_has_partner(active) || 1717 (!__agg_has_partner(active) && 1718 !__agg_has_partner(best)))) { 1719 if (!(!active->actor_oper_aggregator_key && 1720 best->actor_oper_aggregator_key)) { 1721 best = NULL; 1722 active->is_active = 1; 1723 } 1724 } 1725 } 1726 1727 if (best && (best == active)) { 1728 best = NULL; 1729 active->is_active = 1; 1730 } 1731 1732 /* if there is new best aggregator, activate it */ 1733 if (best) { 1734 netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1735 best->slave ? best->slave->dev->name : "NULL", 1736 best->aggregator_identifier, best->num_of_ports, 1737 best->actor_oper_aggregator_key, 1738 best->partner_oper_aggregator_key, 1739 best->is_individual, best->is_active); 1740 netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n", 1741 best->slave ? best->slave->dev->name : "NULL", 1742 best->lag_ports, best->slave); 1743 1744 bond_for_each_slave_rcu(bond, slave, iter) { 1745 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1746 1747 slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1748 agg->aggregator_identifier, agg->num_of_ports, 1749 agg->actor_oper_aggregator_key, 1750 agg->partner_oper_aggregator_key, 1751 agg->is_individual, agg->is_active); 1752 } 1753 1754 /* check if any partner replies */ 1755 if (best->is_individual) 1756 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1757 bond->dev->name); 1758 1759 best->is_active = 1; 1760 netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n", 1761 best->slave ? best->slave->dev->name : "NULL", 1762 best->aggregator_identifier); 1763 netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1764 best->slave ? best->slave->dev->name : "NULL", 1765 best->aggregator_identifier, best->num_of_ports, 1766 best->actor_oper_aggregator_key, 1767 best->partner_oper_aggregator_key, 1768 best->is_individual, best->is_active); 1769 1770 /* disable the ports that were related to the former 1771 * active_aggregator 1772 */ 1773 if (active) { 1774 for (port = active->lag_ports; port; 1775 port = port->next_port_in_aggregator) { 1776 __disable_port(port); 1777 } 1778 } 1779 /* Slave array needs update. */ 1780 *update_slave_arr = true; 1781 } 1782 1783 /* if the selected aggregator is of join individuals 1784 * (partner_system is NULL), enable their ports 1785 */ 1786 active = __get_active_agg(origin); 1787 1788 if (active) { 1789 if (!__agg_has_partner(active)) { 1790 for (port = active->lag_ports; port; 1791 port = port->next_port_in_aggregator) { 1792 __enable_port(port); 1793 } 1794 *update_slave_arr = true; 1795 } 1796 } 1797 1798 rcu_read_unlock(); 1799 1800 bond_3ad_set_carrier(bond); 1801} 1802 1803/** 1804 * ad_clear_agg - clear a given aggregator's parameters 1805 * @aggregator: the aggregator we're looking at 1806 */ 1807static void ad_clear_agg(struct aggregator *aggregator) 1808{ 1809 if (aggregator) { 1810 aggregator->is_individual = false; 1811 aggregator->actor_admin_aggregator_key = 0; 1812 aggregator->actor_oper_aggregator_key = 0; 1813 eth_zero_addr(aggregator->partner_system.mac_addr_value); 1814 aggregator->partner_system_priority = 0; 1815 aggregator->partner_oper_aggregator_key = 0; 1816 aggregator->receive_state = 0; 1817 aggregator->transmit_state = 0; 1818 aggregator->lag_ports = NULL; 1819 aggregator->is_active = 0; 1820 aggregator->num_of_ports = 0; 1821 pr_debug("%s: LAG %d was cleared\n", 1822 aggregator->slave ? 1823 aggregator->slave->dev->name : "NULL", 1824 aggregator->aggregator_identifier); 1825 } 1826} 1827 1828/** 1829 * ad_initialize_agg - initialize a given aggregator's parameters 1830 * @aggregator: the aggregator we're looking at 1831 */ 1832static void ad_initialize_agg(struct aggregator *aggregator) 1833{ 1834 if (aggregator) { 1835 ad_clear_agg(aggregator); 1836 1837 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); 1838 aggregator->aggregator_identifier = 0; 1839 aggregator->slave = NULL; 1840 } 1841} 1842 1843/** 1844 * ad_initialize_port - initialize a given port's parameters 1845 * @port: the port we're looking at 1846 * @lacp_fast: boolean. whether fast periodic should be used 1847 */ 1848static void ad_initialize_port(struct port *port, int lacp_fast) 1849{ 1850 static const struct port_params tmpl = { 1851 .system_priority = 0xffff, 1852 .key = 1, 1853 .port_number = 1, 1854 .port_priority = 0xff, 1855 .port_state = 1, 1856 }; 1857 static const struct lacpdu lacpdu = { 1858 .subtype = 0x01, 1859 .version_number = 0x01, 1860 .tlv_type_actor_info = 0x01, 1861 .actor_information_length = 0x14, 1862 .tlv_type_partner_info = 0x02, 1863 .partner_information_length = 0x14, 1864 .tlv_type_collector_info = 0x03, 1865 .collector_information_length = 0x10, 1866 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1867 }; 1868 1869 if (port) { 1870 port->actor_port_priority = 0xff; 1871 port->actor_port_aggregator_identifier = 0; 1872 port->ntt = false; 1873 port->actor_admin_port_state = LACP_STATE_AGGREGATION | 1874 LACP_STATE_LACP_ACTIVITY; 1875 port->actor_oper_port_state = LACP_STATE_AGGREGATION | 1876 LACP_STATE_LACP_ACTIVITY; 1877 1878 if (lacp_fast) 1879 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; 1880 1881 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1882 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1883 1884 port->is_enabled = true; 1885 /* private parameters */ 1886 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1887 port->sm_rx_state = 0; 1888 port->sm_rx_timer_counter = 0; 1889 port->sm_periodic_state = 0; 1890 port->sm_periodic_timer_counter = 0; 1891 port->sm_mux_state = 0; 1892 port->sm_mux_timer_counter = 0; 1893 port->sm_tx_state = 0; 1894 port->aggregator = NULL; 1895 port->next_port_in_aggregator = NULL; 1896 port->transaction_id = 0; 1897 1898 port->sm_churn_actor_timer_counter = 0; 1899 port->sm_churn_actor_state = 0; 1900 port->churn_actor_count = 0; 1901 port->sm_churn_partner_timer_counter = 0; 1902 port->sm_churn_partner_state = 0; 1903 port->churn_partner_count = 0; 1904 1905 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1906 } 1907} 1908 1909/** 1910 * ad_enable_collecting_distributing - enable a port's transmit/receive 1911 * @port: the port we're looking at 1912 * @update_slave_arr: Does slave array need update? 1913 * 1914 * Enable @port if it's in an active aggregator 1915 */ 1916static void ad_enable_collecting_distributing(struct port *port, 1917 bool *update_slave_arr) 1918{ 1919 if (port->aggregator->is_active) { 1920 slave_dbg(port->slave->bond->dev, port->slave->dev, 1921 "Enabling port %d (LAG %d)\n", 1922 port->actor_port_number, 1923 port->aggregator->aggregator_identifier); 1924 __enable_port(port); 1925 /* Slave array needs update */ 1926 *update_slave_arr = true; 1927 } 1928} 1929 1930/** 1931 * ad_disable_collecting_distributing - disable a port's transmit/receive 1932 * @port: the port we're looking at 1933 * @update_slave_arr: Does slave array need update? 1934 */ 1935static void ad_disable_collecting_distributing(struct port *port, 1936 bool *update_slave_arr) 1937{ 1938 if (port->aggregator && 1939 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1940 &(null_mac_addr))) { 1941 slave_dbg(port->slave->bond->dev, port->slave->dev, 1942 "Disabling port %d (LAG %d)\n", 1943 port->actor_port_number, 1944 port->aggregator->aggregator_identifier); 1945 __disable_port(port); 1946 /* Slave array needs an update */ 1947 *update_slave_arr = true; 1948 } 1949} 1950 1951/** 1952 * ad_marker_info_received - handle receive of a Marker information frame 1953 * @marker_info: Marker info received 1954 * @port: the port we're looking at 1955 */ 1956static void ad_marker_info_received(struct bond_marker *marker_info, 1957 struct port *port) 1958{ 1959 struct bond_marker marker; 1960 1961 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx); 1962 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx); 1963 1964 /* copy the received marker data to the response marker */ 1965 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1966 /* change the marker subtype to marker response */ 1967 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1968 1969 /* send the marker response */ 1970 if (ad_marker_send(port, &marker) >= 0) 1971 slave_dbg(port->slave->bond->dev, port->slave->dev, 1972 "Sent Marker Response on port %d\n", 1973 port->actor_port_number); 1974} 1975 1976/** 1977 * ad_marker_response_received - handle receive of a marker response frame 1978 * @marker: marker PDU received 1979 * @port: the port we're looking at 1980 * 1981 * This function does nothing since we decided not to implement send and handle 1982 * response for marker PDU's, in this stage, but only to respond to marker 1983 * information. 1984 */ 1985static void ad_marker_response_received(struct bond_marker *marker, 1986 struct port *port) 1987{ 1988 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx); 1989 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx); 1990 1991 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1992} 1993 1994/* ========= AD exported functions to the main bonding code ========= */ 1995 1996/* Check aggregators status in team every T seconds */ 1997#define AD_AGGREGATOR_SELECTION_TIMER 8 1998 1999/** 2000 * bond_3ad_initiate_agg_selection - initate aggregator selection 2001 * @bond: bonding struct 2002 * @timeout: timeout value to set 2003 * 2004 * Set the aggregation selection timer, to initiate an agg selection in 2005 * the very near future. Called during first initialization, and during 2006 * any down to up transitions of the bond. 2007 */ 2008void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 2009{ 2010 atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout); 2011} 2012 2013/** 2014 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 2015 * @bond: bonding struct to work on 2016 * 2017 * Can be called only after the mac address of the bond is set. 2018 */ 2019void bond_3ad_initialize(struct bonding *bond) 2020{ 2021 BOND_AD_INFO(bond).aggregator_identifier = 0; 2022 BOND_AD_INFO(bond).system.sys_priority = 2023 bond->params.ad_actor_sys_prio; 2024 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2025 BOND_AD_INFO(bond).system.sys_mac_addr = 2026 *((struct mac_addr *)bond->dev->dev_addr); 2027 else 2028 BOND_AD_INFO(bond).system.sys_mac_addr = 2029 *((struct mac_addr *)bond->params.ad_actor_system); 2030 2031 bond_3ad_initiate_agg_selection(bond, 2032 AD_AGGREGATOR_SELECTION_TIMER * 2033 ad_ticks_per_sec); 2034} 2035 2036/** 2037 * bond_3ad_bind_slave - initialize a slave's port 2038 * @slave: slave struct to work on 2039 * 2040 * Returns: 0 on success 2041 * < 0 on error 2042 */ 2043void bond_3ad_bind_slave(struct slave *slave) 2044{ 2045 struct bonding *bond = bond_get_bond_by_slave(slave); 2046 struct port *port; 2047 struct aggregator *aggregator; 2048 2049 /* check that the slave has not been initialized yet. */ 2050 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 2051 2052 /* port initialization */ 2053 port = &(SLAVE_AD_INFO(slave)->port); 2054 2055 ad_initialize_port(port, bond->params.lacp_fast); 2056 2057 port->slave = slave; 2058 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 2059 /* key is determined according to the link speed, duplex and 2060 * user key 2061 */ 2062 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 2063 ad_update_actor_keys(port, false); 2064 /* actor system is the bond's system */ 2065 __ad_actor_update_port(port); 2066 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 2067 * lacpdu's are sent in one second) 2068 */ 2069 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2070 2071 __disable_port(port); 2072 2073 /* aggregator initialization */ 2074 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2075 2076 ad_initialize_agg(aggregator); 2077 2078 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2079 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2080 aggregator->slave = slave; 2081 aggregator->is_active = 0; 2082 aggregator->num_of_ports = 0; 2083 } 2084} 2085 2086/** 2087 * bond_3ad_unbind_slave - deinitialize a slave's port 2088 * @slave: slave struct to work on 2089 * 2090 * Search for the aggregator that is related to this port, remove the 2091 * aggregator and assign another aggregator for other port related to it 2092 * (if any), and remove the port. 2093 */ 2094void bond_3ad_unbind_slave(struct slave *slave) 2095{ 2096 struct port *port, *prev_port, *temp_port; 2097 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2098 int select_new_active_agg = 0; 2099 struct bonding *bond = slave->bond; 2100 struct slave *slave_iter; 2101 struct list_head *iter; 2102 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2103 2104 /* Sync against bond_3ad_state_machine_handler() */ 2105 spin_lock_bh(&bond->mode_lock); 2106 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2107 port = &(SLAVE_AD_INFO(slave)->port); 2108 2109 /* if slave is null, the whole port is not initialized */ 2110 if (!port->slave) { 2111 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n"); 2112 goto out; 2113 } 2114 2115 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n", 2116 aggregator->aggregator_identifier); 2117 2118 /* Tell the partner that this port is not suitable for aggregation */ 2119 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 2120 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 2121 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 2122 port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION; 2123 __update_lacpdu_from_port(port); 2124 ad_lacpdu_send(port); 2125 2126 /* check if this aggregator is occupied */ 2127 if (aggregator->lag_ports) { 2128 /* check if there are other ports related to this aggregator 2129 * except the port related to this slave(thats ensure us that 2130 * there is a reason to search for new aggregator, and that we 2131 * will find one 2132 */ 2133 if ((aggregator->lag_ports != port) || 2134 (aggregator->lag_ports->next_port_in_aggregator)) { 2135 /* find new aggregator for the related port(s) */ 2136 bond_for_each_slave(bond, slave_iter, iter) { 2137 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2138 /* if the new aggregator is empty, or it is 2139 * connected to our port only 2140 */ 2141 if (!new_aggregator->lag_ports || 2142 ((new_aggregator->lag_ports == port) && 2143 !new_aggregator->lag_ports->next_port_in_aggregator)) 2144 break; 2145 } 2146 if (!slave_iter) 2147 new_aggregator = NULL; 2148 2149 /* if new aggregator found, copy the aggregator's 2150 * parameters and connect the related lag_ports to the 2151 * new aggregator 2152 */ 2153 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2154 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2155 aggregator->aggregator_identifier, 2156 new_aggregator->aggregator_identifier); 2157 2158 if ((new_aggregator->lag_ports == port) && 2159 new_aggregator->is_active) { 2160 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2161 select_new_active_agg = 1; 2162 } 2163 2164 new_aggregator->is_individual = aggregator->is_individual; 2165 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2166 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2167 new_aggregator->partner_system = aggregator->partner_system; 2168 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2169 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2170 new_aggregator->receive_state = aggregator->receive_state; 2171 new_aggregator->transmit_state = aggregator->transmit_state; 2172 new_aggregator->lag_ports = aggregator->lag_ports; 2173 new_aggregator->is_active = aggregator->is_active; 2174 new_aggregator->num_of_ports = aggregator->num_of_ports; 2175 2176 /* update the information that is written on 2177 * the ports about the aggregator 2178 */ 2179 for (temp_port = aggregator->lag_ports; temp_port; 2180 temp_port = temp_port->next_port_in_aggregator) { 2181 temp_port->aggregator = new_aggregator; 2182 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2183 } 2184 2185 ad_clear_agg(aggregator); 2186 2187 if (select_new_active_agg) 2188 ad_agg_selection_logic(__get_first_agg(port), 2189 &dummy_slave_update); 2190 } else { 2191 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2192 } 2193 } else { 2194 /* in case that the only port related to this 2195 * aggregator is the one we want to remove 2196 */ 2197 select_new_active_agg = aggregator->is_active; 2198 ad_clear_agg(aggregator); 2199 if (select_new_active_agg) { 2200 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2201 /* select new active aggregator */ 2202 temp_aggregator = __get_first_agg(port); 2203 if (temp_aggregator) 2204 ad_agg_selection_logic(temp_aggregator, 2205 &dummy_slave_update); 2206 } 2207 } 2208 } 2209 2210 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number); 2211 2212 /* find the aggregator that this port is connected to */ 2213 bond_for_each_slave(bond, slave_iter, iter) { 2214 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2215 prev_port = NULL; 2216 /* search the port in the aggregator's related ports */ 2217 for (temp_port = temp_aggregator->lag_ports; temp_port; 2218 prev_port = temp_port, 2219 temp_port = temp_port->next_port_in_aggregator) { 2220 if (temp_port == port) { 2221 /* the aggregator found - detach the port from 2222 * this aggregator 2223 */ 2224 if (prev_port) 2225 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2226 else 2227 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2228 temp_aggregator->num_of_ports--; 2229 if (__agg_active_ports(temp_aggregator) == 0) { 2230 select_new_active_agg = temp_aggregator->is_active; 2231 if (temp_aggregator->num_of_ports == 0) 2232 ad_clear_agg(temp_aggregator); 2233 if (select_new_active_agg) { 2234 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2235 /* select new active aggregator */ 2236 ad_agg_selection_logic(__get_first_agg(port), 2237 &dummy_slave_update); 2238 } 2239 } 2240 break; 2241 } 2242 } 2243 } 2244 port->slave = NULL; 2245 2246out: 2247 spin_unlock_bh(&bond->mode_lock); 2248} 2249 2250/** 2251 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2252 * @bond: bonding struct to work on 2253 * 2254 * If an ad_actor setting gets changed we need to update the individual port 2255 * settings so the bond device will use the new values when it gets upped. 2256 */ 2257void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2258{ 2259 struct list_head *iter; 2260 struct slave *slave; 2261 2262 ASSERT_RTNL(); 2263 2264 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2265 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2266 BOND_AD_INFO(bond).system.sys_mac_addr = 2267 *((struct mac_addr *)bond->dev->dev_addr); 2268 else 2269 BOND_AD_INFO(bond).system.sys_mac_addr = 2270 *((struct mac_addr *)bond->params.ad_actor_system); 2271 2272 spin_lock_bh(&bond->mode_lock); 2273 bond_for_each_slave(bond, slave, iter) { 2274 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2275 2276 __ad_actor_update_port(port); 2277 port->ntt = true; 2278 } 2279 spin_unlock_bh(&bond->mode_lock); 2280} 2281 2282/** 2283 * bond_agg_timer_advance - advance agg_select_timer 2284 * @bond: bonding structure 2285 * 2286 * Return true when agg_select_timer reaches 0. 2287 */ 2288static bool bond_agg_timer_advance(struct bonding *bond) 2289{ 2290 int val, nval; 2291 2292 while (1) { 2293 val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer); 2294 if (!val) 2295 return false; 2296 nval = val - 1; 2297 if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer, 2298 val, nval) == val) 2299 break; 2300 } 2301 return nval == 0; 2302} 2303 2304/** 2305 * bond_3ad_state_machine_handler - handle state machines timeout 2306 * @work: work context to fetch bonding struct to work on from 2307 * 2308 * The state machine handling concept in this module is to check every tick 2309 * which state machine should operate any function. The execution order is 2310 * round robin, so when we have an interaction between state machines, the 2311 * reply of one to each other might be delayed until next tick. 2312 * 2313 * This function also complete the initialization when the agg_select_timer 2314 * times out, and it selects an aggregator for the ports that are yet not 2315 * related to any aggregator, and selects the active aggregator for a bond. 2316 */ 2317void bond_3ad_state_machine_handler(struct work_struct *work) 2318{ 2319 struct bonding *bond = container_of(work, struct bonding, 2320 ad_work.work); 2321 struct aggregator *aggregator; 2322 struct list_head *iter; 2323 struct slave *slave; 2324 struct port *port; 2325 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2326 bool update_slave_arr = false; 2327 2328 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2329 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2330 * concurrently due to incoming LACPDU as well. 2331 */ 2332 spin_lock_bh(&bond->mode_lock); 2333 rcu_read_lock(); 2334 2335 /* check if there are any slaves */ 2336 if (!bond_has_slaves(bond)) 2337 goto re_arm; 2338 2339 if (bond_agg_timer_advance(bond)) { 2340 slave = bond_first_slave_rcu(bond); 2341 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2342 2343 /* select the active aggregator for the bond */ 2344 if (port) { 2345 if (!port->slave) { 2346 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2347 bond->dev->name); 2348 goto re_arm; 2349 } 2350 2351 aggregator = __get_first_agg(port); 2352 ad_agg_selection_logic(aggregator, &update_slave_arr); 2353 } 2354 bond_3ad_set_carrier(bond); 2355 } 2356 2357 /* for each port run the state machines */ 2358 bond_for_each_slave_rcu(bond, slave, iter) { 2359 port = &(SLAVE_AD_INFO(slave)->port); 2360 if (!port->slave) { 2361 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2362 bond->dev->name); 2363 goto re_arm; 2364 } 2365 2366 ad_rx_machine(NULL, port); 2367 ad_periodic_machine(port, &bond->params); 2368 ad_port_selection_logic(port, &update_slave_arr); 2369 ad_mux_machine(port, &update_slave_arr); 2370 ad_tx_machine(port); 2371 ad_churn_machine(port); 2372 2373 /* turn off the BEGIN bit, since we already handled it */ 2374 if (port->sm_vars & AD_PORT_BEGIN) 2375 port->sm_vars &= ~AD_PORT_BEGIN; 2376 } 2377 2378re_arm: 2379 bond_for_each_slave_rcu(bond, slave, iter) { 2380 if (slave->should_notify) { 2381 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2382 break; 2383 } 2384 } 2385 rcu_read_unlock(); 2386 spin_unlock_bh(&bond->mode_lock); 2387 2388 if (update_slave_arr) 2389 bond_slave_arr_work_rearm(bond, 0); 2390 2391 if (should_notify_rtnl && rtnl_trylock()) { 2392 bond_slave_state_notify(bond); 2393 rtnl_unlock(); 2394 } 2395 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2396} 2397 2398/** 2399 * bond_3ad_rx_indication - handle a received frame 2400 * @lacpdu: received lacpdu 2401 * @slave: slave struct to work on 2402 * 2403 * It is assumed that frames that were sent on this NIC don't returned as new 2404 * received frames (loopback). Since only the payload is given to this 2405 * function, it check for loopback. 2406 */ 2407static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave) 2408{ 2409 struct bonding *bond = slave->bond; 2410 int ret = RX_HANDLER_ANOTHER; 2411 struct bond_marker *marker; 2412 struct port *port; 2413 atomic64_t *stat; 2414 2415 port = &(SLAVE_AD_INFO(slave)->port); 2416 if (!port->slave) { 2417 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2418 slave->dev->name, slave->bond->dev->name); 2419 return ret; 2420 } 2421 2422 switch (lacpdu->subtype) { 2423 case AD_TYPE_LACPDU: 2424 ret = RX_HANDLER_CONSUMED; 2425 slave_dbg(slave->bond->dev, slave->dev, 2426 "Received LACPDU on port %d\n", 2427 port->actor_port_number); 2428 /* Protect against concurrent state machines */ 2429 spin_lock(&slave->bond->mode_lock); 2430 ad_rx_machine(lacpdu, port); 2431 spin_unlock(&slave->bond->mode_lock); 2432 break; 2433 case AD_TYPE_MARKER: 2434 ret = RX_HANDLER_CONSUMED; 2435 /* No need to convert fields to Little Endian since we 2436 * don't use the marker's fields. 2437 */ 2438 marker = (struct bond_marker *)lacpdu; 2439 switch (marker->tlv_type) { 2440 case AD_MARKER_INFORMATION_SUBTYPE: 2441 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n", 2442 port->actor_port_number); 2443 ad_marker_info_received(marker, port); 2444 break; 2445 case AD_MARKER_RESPONSE_SUBTYPE: 2446 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n", 2447 port->actor_port_number); 2448 ad_marker_response_received(marker, port); 2449 break; 2450 default: 2451 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n", 2452 port->actor_port_number); 2453 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx; 2454 atomic64_inc(stat); 2455 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx; 2456 atomic64_inc(stat); 2457 } 2458 break; 2459 default: 2460 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx); 2461 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx); 2462 } 2463 2464 return ret; 2465} 2466 2467/** 2468 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2469 * its current speed and duplex settings. 2470 * 2471 * @port: the port we'are looking at 2472 * @reset: Boolean to just reset the speed and the duplex part of the key 2473 * 2474 * The logic to change the oper / admin keys is: 2475 * (a) A full duplex port can participate in LACP with partner. 2476 * (b) When the speed is changed, LACP need to be reinitiated. 2477 */ 2478static void ad_update_actor_keys(struct port *port, bool reset) 2479{ 2480 u8 duplex = 0; 2481 u16 ospeed = 0, speed = 0; 2482 u16 old_oper_key = port->actor_oper_port_key; 2483 2484 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2485 if (!reset) { 2486 speed = __get_link_speed(port); 2487 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2488 duplex = __get_duplex(port); 2489 port->actor_admin_port_key |= (speed << 1) | duplex; 2490 } 2491 port->actor_oper_port_key = port->actor_admin_port_key; 2492 2493 if (old_oper_key != port->actor_oper_port_key) { 2494 /* Only 'duplex' port participates in LACP */ 2495 if (duplex) 2496 port->sm_vars |= AD_PORT_LACP_ENABLED; 2497 else 2498 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2499 2500 if (!reset) { 2501 if (!speed) { 2502 slave_err(port->slave->bond->dev, 2503 port->slave->dev, 2504 "speed changed to 0 on port %d\n", 2505 port->actor_port_number); 2506 } else if (duplex && ospeed != speed) { 2507 /* Speed change restarts LACP state-machine */ 2508 port->sm_vars |= AD_PORT_BEGIN; 2509 } 2510 } 2511 } 2512} 2513 2514/** 2515 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2516 * change indication 2517 * 2518 * @slave: slave struct to work on 2519 * 2520 * Handle reselection of aggregator (if needed) for this port. 2521 */ 2522void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2523{ 2524 struct port *port; 2525 2526 port = &(SLAVE_AD_INFO(slave)->port); 2527 2528 /* if slave is null, the whole port is not initialized */ 2529 if (!port->slave) { 2530 slave_warn(slave->bond->dev, slave->dev, 2531 "speed/duplex changed for uninitialized port\n"); 2532 return; 2533 } 2534 2535 spin_lock_bh(&slave->bond->mode_lock); 2536 ad_update_actor_keys(port, false); 2537 spin_unlock_bh(&slave->bond->mode_lock); 2538 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n", 2539 port->actor_port_number); 2540} 2541 2542/** 2543 * bond_3ad_handle_link_change - handle a slave's link status change indication 2544 * @slave: slave struct to work on 2545 * @link: whether the link is now up or down 2546 * 2547 * Handle reselection of aggregator (if needed) for this port. 2548 */ 2549void bond_3ad_handle_link_change(struct slave *slave, char link) 2550{ 2551 struct aggregator *agg; 2552 struct port *port; 2553 bool dummy; 2554 2555 port = &(SLAVE_AD_INFO(slave)->port); 2556 2557 /* if slave is null, the whole port is not initialized */ 2558 if (!port->slave) { 2559 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n"); 2560 return; 2561 } 2562 2563 spin_lock_bh(&slave->bond->mode_lock); 2564 /* on link down we are zeroing duplex and speed since 2565 * some of the adaptors(ce1000.lan) report full duplex/speed 2566 * instead of N/A(duplex) / 0(speed). 2567 * 2568 * on link up we are forcing recheck on the duplex and speed since 2569 * some of he adaptors(ce1000.lan) report. 2570 */ 2571 if (link == BOND_LINK_UP) { 2572 port->is_enabled = true; 2573 ad_update_actor_keys(port, false); 2574 } else { 2575 /* link has failed */ 2576 port->is_enabled = false; 2577 ad_update_actor_keys(port, true); 2578 } 2579 agg = __get_first_agg(port); 2580 ad_agg_selection_logic(agg, &dummy); 2581 2582 spin_unlock_bh(&slave->bond->mode_lock); 2583 2584 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n", 2585 port->actor_port_number, 2586 link == BOND_LINK_UP ? "UP" : "DOWN"); 2587 2588 /* RTNL is held and mode_lock is released so it's safe 2589 * to update slave_array here. 2590 */ 2591 bond_update_slave_arr(slave->bond, NULL); 2592} 2593 2594/** 2595 * bond_3ad_set_carrier - set link state for bonding master 2596 * @bond: bonding structure 2597 * 2598 * if we have an active aggregator, we're up, if not, we're down. 2599 * Presumes that we cannot have an active aggregator if there are 2600 * no slaves with link up. 2601 * 2602 * This behavior complies with IEEE 802.3 section 43.3.9. 2603 * 2604 * Called by bond_set_carrier(). Return zero if carrier state does not 2605 * change, nonzero if it does. 2606 */ 2607int bond_3ad_set_carrier(struct bonding *bond) 2608{ 2609 struct aggregator *active; 2610 struct slave *first_slave; 2611 int ret = 1; 2612 2613 rcu_read_lock(); 2614 first_slave = bond_first_slave_rcu(bond); 2615 if (!first_slave) { 2616 ret = 0; 2617 goto out; 2618 } 2619 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2620 if (active) { 2621 /* are enough slaves available to consider link up? */ 2622 if (__agg_active_ports(active) < bond->params.min_links) { 2623 if (netif_carrier_ok(bond->dev)) { 2624 netif_carrier_off(bond->dev); 2625 goto out; 2626 } 2627 } else if (!netif_carrier_ok(bond->dev)) { 2628 netif_carrier_on(bond->dev); 2629 goto out; 2630 } 2631 } else if (netif_carrier_ok(bond->dev)) { 2632 netif_carrier_off(bond->dev); 2633 } 2634out: 2635 rcu_read_unlock(); 2636 return ret; 2637} 2638 2639/** 2640 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2641 * @bond: bonding struct to work on 2642 * @ad_info: ad_info struct to fill with the bond's info 2643 * 2644 * Returns: 0 on success 2645 * < 0 on error 2646 */ 2647int __bond_3ad_get_active_agg_info(struct bonding *bond, 2648 struct ad_info *ad_info) 2649{ 2650 struct aggregator *aggregator = NULL; 2651 struct list_head *iter; 2652 struct slave *slave; 2653 struct port *port; 2654 2655 bond_for_each_slave_rcu(bond, slave, iter) { 2656 port = &(SLAVE_AD_INFO(slave)->port); 2657 if (port->aggregator && port->aggregator->is_active) { 2658 aggregator = port->aggregator; 2659 break; 2660 } 2661 } 2662 2663 if (!aggregator) 2664 return -1; 2665 2666 ad_info->aggregator_id = aggregator->aggregator_identifier; 2667 ad_info->ports = __agg_active_ports(aggregator); 2668 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2669 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2670 ether_addr_copy(ad_info->partner_system, 2671 aggregator->partner_system.mac_addr_value); 2672 return 0; 2673} 2674 2675int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2676{ 2677 int ret; 2678 2679 rcu_read_lock(); 2680 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2681 rcu_read_unlock(); 2682 2683 return ret; 2684} 2685 2686int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2687 struct slave *slave) 2688{ 2689 struct lacpdu *lacpdu, _lacpdu; 2690 2691 if (skb->protocol != PKT_TYPE_LACPDU) 2692 return RX_HANDLER_ANOTHER; 2693 2694 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2695 return RX_HANDLER_ANOTHER; 2696 2697 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2698 if (!lacpdu) { 2699 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx); 2700 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx); 2701 return RX_HANDLER_ANOTHER; 2702 } 2703 2704 return bond_3ad_rx_indication(lacpdu, slave); 2705} 2706 2707/** 2708 * bond_3ad_update_lacp_rate - change the lacp rate 2709 * @bond: bonding struct 2710 * 2711 * When modify lacp_rate parameter via sysfs, 2712 * update actor_oper_port_state of each port. 2713 * 2714 * Hold bond->mode_lock, 2715 * so we can modify port->actor_oper_port_state, 2716 * no matter bond is up or down. 2717 */ 2718void bond_3ad_update_lacp_rate(struct bonding *bond) 2719{ 2720 struct port *port = NULL; 2721 struct list_head *iter; 2722 struct slave *slave; 2723 int lacp_fast; 2724 2725 lacp_fast = bond->params.lacp_fast; 2726 spin_lock_bh(&bond->mode_lock); 2727 bond_for_each_slave(bond, slave, iter) { 2728 port = &(SLAVE_AD_INFO(slave)->port); 2729 if (lacp_fast) 2730 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; 2731 else 2732 port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT; 2733 } 2734 spin_unlock_bh(&bond->mode_lock); 2735} 2736 2737size_t bond_3ad_stats_size(void) 2738{ 2739 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */ 2740 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */ 2741 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */ 2742 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */ 2743 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */ 2744 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */ 2745 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */ 2746 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */ 2747 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */ 2748} 2749 2750int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats) 2751{ 2752 u64 val; 2753 2754 val = atomic64_read(&stats->lacpdu_rx); 2755 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val, 2756 BOND_3AD_STAT_PAD)) 2757 return -EMSGSIZE; 2758 val = atomic64_read(&stats->lacpdu_tx); 2759 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val, 2760 BOND_3AD_STAT_PAD)) 2761 return -EMSGSIZE; 2762 val = atomic64_read(&stats->lacpdu_unknown_rx); 2763 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val, 2764 BOND_3AD_STAT_PAD)) 2765 return -EMSGSIZE; 2766 val = atomic64_read(&stats->lacpdu_illegal_rx); 2767 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val, 2768 BOND_3AD_STAT_PAD)) 2769 return -EMSGSIZE; 2770 2771 val = atomic64_read(&stats->marker_rx); 2772 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val, 2773 BOND_3AD_STAT_PAD)) 2774 return -EMSGSIZE; 2775 val = atomic64_read(&stats->marker_tx); 2776 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val, 2777 BOND_3AD_STAT_PAD)) 2778 return -EMSGSIZE; 2779 val = atomic64_read(&stats->marker_resp_rx); 2780 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val, 2781 BOND_3AD_STAT_PAD)) 2782 return -EMSGSIZE; 2783 val = atomic64_read(&stats->marker_resp_tx); 2784 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val, 2785 BOND_3AD_STAT_PAD)) 2786 return -EMSGSIZE; 2787 val = atomic64_read(&stats->marker_unknown_rx); 2788 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val, 2789 BOND_3AD_STAT_PAD)) 2790 return -EMSGSIZE; 2791 2792 return 0; 2793} 2794