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 u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL; 86static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 87 88const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = { 89 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 90}; 91 92/* ================= main 802.3ad protocol functions ================== */ 93static int ad_lacpdu_send(struct port *port); 94static int ad_marker_send(struct port *port, struct bond_marker *marker); 95static void ad_mux_machine(struct port *port, bool *update_slave_arr); 96static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 97static void ad_tx_machine(struct port *port); 98static void ad_periodic_machine(struct port *port, struct bond_params *bond_params); 99static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 100static void ad_agg_selection_logic(struct aggregator *aggregator, 101 bool *update_slave_arr); 102static void ad_clear_agg(struct aggregator *aggregator); 103static void ad_initialize_agg(struct aggregator *aggregator); 104static void ad_initialize_port(struct port *port, int lacp_fast); 105static void ad_enable_collecting(struct port *port); 106static void ad_disable_distributing(struct port *port, 107 bool *update_slave_arr); 108static void ad_enable_collecting_distributing(struct port *port, 109 bool *update_slave_arr); 110static void ad_disable_collecting_distributing(struct port *port, 111 bool *update_slave_arr); 112static void ad_marker_info_received(struct bond_marker *marker_info, 113 struct port *port); 114static void ad_marker_response_received(struct bond_marker *marker, 115 struct port *port); 116static void ad_update_actor_keys(struct port *port, bool reset); 117 118 119/* ================= api to bonding and kernel code ================== */ 120 121/** 122 * __get_bond_by_port - get the port's bonding struct 123 * @port: the port we're looking at 124 * 125 * Return @port's bonding struct, or %NULL if it can't be found. 126 */ 127static inline struct bonding *__get_bond_by_port(struct port *port) 128{ 129 if (port->slave == NULL) 130 return NULL; 131 132 return bond_get_bond_by_slave(port->slave); 133} 134 135/** 136 * __get_first_agg - get the first aggregator in the bond 137 * @port: the port we're looking at 138 * 139 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 140 * found. 141 * The caller must hold RCU or RTNL lock. 142 */ 143static inline struct aggregator *__get_first_agg(struct port *port) 144{ 145 struct bonding *bond = __get_bond_by_port(port); 146 struct slave *first_slave; 147 struct aggregator *agg; 148 149 /* If there's no bond for this port, or bond has no slaves */ 150 if (bond == NULL) 151 return NULL; 152 153 rcu_read_lock(); 154 first_slave = bond_first_slave_rcu(bond); 155 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 156 rcu_read_unlock(); 157 158 return agg; 159} 160 161/** 162 * __agg_has_partner - see if we have a partner 163 * @agg: the agregator we're looking at 164 * 165 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 166 * address for the partner). Return 0 if not. 167 */ 168static inline int __agg_has_partner(struct aggregator *agg) 169{ 170 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 171} 172 173/** 174 * __disable_distributing_port - disable the port's slave for distributing. 175 * Port will still be able to collect. 176 * @port: the port we're looking at 177 * 178 * This will disable only distributing on the port's slave. 179 */ 180static void __disable_distributing_port(struct port *port) 181{ 182 bond_set_slave_tx_disabled_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 183} 184 185/** 186 * __enable_collecting_port - enable the port's slave for collecting, 187 * if it's up 188 * @port: the port we're looking at 189 * 190 * This will enable only collecting on the port's slave. 191 */ 192static void __enable_collecting_port(struct port *port) 193{ 194 struct slave *slave = port->slave; 195 196 if (slave->link == BOND_LINK_UP && bond_slave_is_up(slave)) 197 bond_set_slave_rx_enabled_flags(slave, BOND_SLAVE_NOTIFY_LATER); 198} 199 200/** 201 * __disable_port - disable the port's slave 202 * @port: the port we're looking at 203 * 204 * This will disable both collecting and distributing on the port's slave. 205 */ 206static inline void __disable_port(struct port *port) 207{ 208 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 209} 210 211/** 212 * __enable_port - enable the port's slave, if it's up 213 * @port: the port we're looking at 214 * 215 * This will enable both collecting and distributing on the port's slave. 216 */ 217static inline void __enable_port(struct port *port) 218{ 219 struct slave *slave = port->slave; 220 221 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 222 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 223} 224 225/** 226 * __port_move_to_attached_state - check if port should transition back to attached 227 * state. 228 * @port: the port we're looking at 229 */ 230static bool __port_move_to_attached_state(struct port *port) 231{ 232 if (!(port->sm_vars & AD_PORT_SELECTED) || 233 (port->sm_vars & AD_PORT_STANDBY) || 234 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) || 235 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) 236 port->sm_mux_state = AD_MUX_ATTACHED; 237 238 return port->sm_mux_state == AD_MUX_ATTACHED; 239} 240 241/** 242 * __port_is_collecting_distributing - check if the port's slave is in the 243 * combined collecting/distributing state 244 * @port: the port we're looking at 245 */ 246static int __port_is_collecting_distributing(struct port *port) 247{ 248 return bond_is_active_slave(port->slave); 249} 250 251/** 252 * __get_agg_selection_mode - get the aggregator selection mode 253 * @port: the port we're looking at 254 * 255 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 256 */ 257static inline u32 __get_agg_selection_mode(struct port *port) 258{ 259 struct bonding *bond = __get_bond_by_port(port); 260 261 if (bond == NULL) 262 return BOND_AD_STABLE; 263 264 return bond->params.ad_select; 265} 266 267/** 268 * __check_agg_selection_timer - check if the selection timer has expired 269 * @port: the port we're looking at 270 */ 271static inline int __check_agg_selection_timer(struct port *port) 272{ 273 struct bonding *bond = __get_bond_by_port(port); 274 275 if (bond == NULL) 276 return 0; 277 278 return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0; 279} 280 281/** 282 * __get_link_speed - get a port's speed 283 * @port: the port we're looking at 284 * 285 * Return @port's speed in 802.3ad enum format. i.e. one of: 286 * 0, 287 * %AD_LINK_SPEED_10MBPS, 288 * %AD_LINK_SPEED_100MBPS, 289 * %AD_LINK_SPEED_1000MBPS, 290 * %AD_LINK_SPEED_2500MBPS, 291 * %AD_LINK_SPEED_5000MBPS, 292 * %AD_LINK_SPEED_10000MBPS 293 * %AD_LINK_SPEED_14000MBPS, 294 * %AD_LINK_SPEED_20000MBPS 295 * %AD_LINK_SPEED_25000MBPS 296 * %AD_LINK_SPEED_40000MBPS 297 * %AD_LINK_SPEED_50000MBPS 298 * %AD_LINK_SPEED_56000MBPS 299 * %AD_LINK_SPEED_100000MBPS 300 * %AD_LINK_SPEED_200000MBPS 301 * %AD_LINK_SPEED_400000MBPS 302 * %AD_LINK_SPEED_800000MBPS 303 */ 304static u16 __get_link_speed(struct port *port) 305{ 306 struct slave *slave = port->slave; 307 u16 speed; 308 309 /* this if covers only a special case: when the configuration starts 310 * with link down, it sets the speed to 0. 311 * This is done in spite of the fact that the e100 driver reports 0 312 * to be compatible with MVT in the future. 313 */ 314 if (slave->link != BOND_LINK_UP) 315 speed = 0; 316 else { 317 switch (slave->speed) { 318 case SPEED_10: 319 speed = AD_LINK_SPEED_10MBPS; 320 break; 321 322 case SPEED_100: 323 speed = AD_LINK_SPEED_100MBPS; 324 break; 325 326 case SPEED_1000: 327 speed = AD_LINK_SPEED_1000MBPS; 328 break; 329 330 case SPEED_2500: 331 speed = AD_LINK_SPEED_2500MBPS; 332 break; 333 334 case SPEED_5000: 335 speed = AD_LINK_SPEED_5000MBPS; 336 break; 337 338 case SPEED_10000: 339 speed = AD_LINK_SPEED_10000MBPS; 340 break; 341 342 case SPEED_14000: 343 speed = AD_LINK_SPEED_14000MBPS; 344 break; 345 346 case SPEED_20000: 347 speed = AD_LINK_SPEED_20000MBPS; 348 break; 349 350 case SPEED_25000: 351 speed = AD_LINK_SPEED_25000MBPS; 352 break; 353 354 case SPEED_40000: 355 speed = AD_LINK_SPEED_40000MBPS; 356 break; 357 358 case SPEED_50000: 359 speed = AD_LINK_SPEED_50000MBPS; 360 break; 361 362 case SPEED_56000: 363 speed = AD_LINK_SPEED_56000MBPS; 364 break; 365 366 case SPEED_100000: 367 speed = AD_LINK_SPEED_100000MBPS; 368 break; 369 370 case SPEED_200000: 371 speed = AD_LINK_SPEED_200000MBPS; 372 break; 373 374 case SPEED_400000: 375 speed = AD_LINK_SPEED_400000MBPS; 376 break; 377 378 case SPEED_800000: 379 speed = AD_LINK_SPEED_800000MBPS; 380 break; 381 382 default: 383 /* unknown speed value from ethtool. shouldn't happen */ 384 if (slave->speed != SPEED_UNKNOWN) 385 pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n", 386 slave->bond->dev->name, 387 slave->dev->name, slave->speed, 388 port->actor_port_number); 389 speed = 0; 390 break; 391 } 392 } 393 394 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n", 395 port->actor_port_number, speed); 396 return speed; 397} 398 399/** 400 * __get_duplex - get a port's duplex 401 * @port: the port we're looking at 402 * 403 * Return @port's duplex in 802.3ad bitmask format. i.e.: 404 * 0x01 if in full duplex 405 * 0x00 otherwise 406 */ 407static u8 __get_duplex(struct port *port) 408{ 409 struct slave *slave = port->slave; 410 u8 retval = 0x0; 411 412 /* handling a special case: when the configuration starts with 413 * link down, it sets the duplex to 0. 414 */ 415 if (slave->link == BOND_LINK_UP) { 416 switch (slave->duplex) { 417 case DUPLEX_FULL: 418 retval = 0x1; 419 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n", 420 port->actor_port_number); 421 break; 422 case DUPLEX_HALF: 423 default: 424 retval = 0x0; 425 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n", 426 port->actor_port_number); 427 break; 428 } 429 } 430 return retval; 431} 432 433static void __ad_actor_update_port(struct port *port) 434{ 435 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 436 437 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 438 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 439} 440 441/* Conversions */ 442 443/** 444 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 445 * @timer_type: which timer to operate 446 * @par: timer parameter. see below 447 * 448 * If @timer_type is %current_while_timer, @par indicates long/short timer. 449 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 450 * %SLOW_PERIODIC_TIME. 451 */ 452static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 453{ 454 u16 retval = 0; /* to silence the compiler */ 455 456 switch (timer_type) { 457 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 458 if (par) 459 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 460 else 461 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 462 break; 463 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 464 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 465 break; 466 case AD_PERIODIC_TIMER: /* for periodic machine */ 467 retval = (par*ad_ticks_per_sec); /* long timeout */ 468 break; 469 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 470 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 471 break; 472 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 473 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 474 break; 475 } 476 477 return retval; 478} 479 480 481/* ================= ad_rx_machine helper functions ================== */ 482 483/** 484 * __choose_matched - update a port's matched variable from a received lacpdu 485 * @lacpdu: the lacpdu we've received 486 * @port: the port we're looking at 487 * 488 * Update the value of the matched variable, using parameter values from a 489 * newly received lacpdu. Parameter values for the partner carried in the 490 * received PDU are compared with the corresponding operational parameter 491 * values for the actor. Matched is set to TRUE if all of these parameters 492 * match and the PDU parameter partner_state.aggregation has the same value as 493 * actor_oper_port_state.aggregation and lacp will actively maintain the link 494 * in the aggregation. Matched is also set to TRUE if the value of 495 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 496 * an individual link and lacp will actively maintain the link. Otherwise, 497 * matched is set to FALSE. LACP is considered to be actively maintaining the 498 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 499 * the actor's actor_oper_port_state.lacp_activity and the PDU's 500 * partner_state.lacp_activity variables are TRUE. 501 * 502 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 503 * used here to implement the language from 802.3ad 43.4.9 that requires 504 * recordPDU to "match" the LACPDU parameters to the stored values. 505 */ 506static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 507{ 508 /* check if all parameters are alike 509 * or this is individual link(aggregation == FALSE) 510 * then update the state machine Matched variable. 511 */ 512 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 513 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 514 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 515 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 516 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 517 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) || 518 ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0) 519 ) { 520 port->sm_vars |= AD_PORT_MATCHED; 521 } else { 522 port->sm_vars &= ~AD_PORT_MATCHED; 523 } 524} 525 526/** 527 * __record_pdu - record parameters from a received lacpdu 528 * @lacpdu: the lacpdu we've received 529 * @port: the port we're looking at 530 * 531 * Record the parameter values for the Actor carried in a received lacpdu as 532 * the current partner operational parameter values and sets 533 * actor_oper_port_state.defaulted to FALSE. 534 */ 535static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 536{ 537 if (lacpdu && port) { 538 struct port_params *partner = &port->partner_oper; 539 540 __choose_matched(lacpdu, port); 541 /* record the new parameter values for the partner 542 * operational 543 */ 544 partner->port_number = ntohs(lacpdu->actor_port); 545 partner->port_priority = ntohs(lacpdu->actor_port_priority); 546 partner->system = lacpdu->actor_system; 547 partner->system_priority = ntohs(lacpdu->actor_system_priority); 548 partner->key = ntohs(lacpdu->actor_key); 549 partner->port_state = lacpdu->actor_state; 550 551 /* set actor_oper_port_state.defaulted to FALSE */ 552 port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED; 553 554 /* set the partner sync. to on if the partner is sync, 555 * and the port is matched 556 */ 557 if ((port->sm_vars & AD_PORT_MATCHED) && 558 (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) { 559 partner->port_state |= LACP_STATE_SYNCHRONIZATION; 560 slave_dbg(port->slave->bond->dev, port->slave->dev, 561 "partner sync=1\n"); 562 } else { 563 partner->port_state &= ~LACP_STATE_SYNCHRONIZATION; 564 slave_dbg(port->slave->bond->dev, port->slave->dev, 565 "partner sync=0\n"); 566 } 567 } 568} 569 570/** 571 * __record_default - record default parameters 572 * @port: the port we're looking at 573 * 574 * This function records the default parameter values for the partner carried 575 * in the Partner Admin parameters as the current partner operational parameter 576 * values and sets actor_oper_port_state.defaulted to TRUE. 577 */ 578static void __record_default(struct port *port) 579{ 580 if (port) { 581 /* record the partner admin parameters */ 582 memcpy(&port->partner_oper, &port->partner_admin, 583 sizeof(struct port_params)); 584 585 /* set actor_oper_port_state.defaulted to true */ 586 port->actor_oper_port_state |= LACP_STATE_DEFAULTED; 587 } 588} 589 590/** 591 * __update_selected - update a port's Selected variable from a received lacpdu 592 * @lacpdu: the lacpdu we've received 593 * @port: the port we're looking at 594 * 595 * Update the value of the selected variable, using parameter values from a 596 * newly received lacpdu. The parameter values for the Actor carried in the 597 * received PDU are compared with the corresponding operational parameter 598 * values for the ports partner. If one or more of the comparisons shows that 599 * the value(s) received in the PDU differ from the current operational values, 600 * then selected is set to FALSE and actor_oper_port_state.synchronization is 601 * set to out_of_sync. Otherwise, selected remains unchanged. 602 */ 603static void __update_selected(struct lacpdu *lacpdu, struct port *port) 604{ 605 if (lacpdu && port) { 606 const struct port_params *partner = &port->partner_oper; 607 608 /* check if any parameter is different then 609 * update the state machine selected variable. 610 */ 611 if (ntohs(lacpdu->actor_port) != partner->port_number || 612 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 613 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 614 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 615 ntohs(lacpdu->actor_key) != partner->key || 616 (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) { 617 port->sm_vars &= ~AD_PORT_SELECTED; 618 } 619 } 620} 621 622/** 623 * __update_default_selected - update a port's Selected variable from Partner 624 * @port: the port we're looking at 625 * 626 * This function updates the value of the selected variable, using the partner 627 * administrative parameter values. The administrative values are compared with 628 * the corresponding operational parameter values for the partner. If one or 629 * more of the comparisons shows that the administrative value(s) differ from 630 * the current operational values, then Selected is set to FALSE and 631 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 632 * Selected remains unchanged. 633 */ 634static void __update_default_selected(struct port *port) 635{ 636 if (port) { 637 const struct port_params *admin = &port->partner_admin; 638 const struct port_params *oper = &port->partner_oper; 639 640 /* check if any parameter is different then 641 * update the state machine selected variable. 642 */ 643 if (admin->port_number != oper->port_number || 644 admin->port_priority != oper->port_priority || 645 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 646 admin->system_priority != oper->system_priority || 647 admin->key != oper->key || 648 (admin->port_state & LACP_STATE_AGGREGATION) 649 != (oper->port_state & LACP_STATE_AGGREGATION)) { 650 port->sm_vars &= ~AD_PORT_SELECTED; 651 } 652 } 653} 654 655/** 656 * __update_ntt - update a port's ntt variable from a received lacpdu 657 * @lacpdu: the lacpdu we've received 658 * @port: the port we're looking at 659 * 660 * Updates the value of the ntt variable, using parameter values from a newly 661 * received lacpdu. The parameter values for the partner carried in the 662 * received PDU are compared with the corresponding operational parameter 663 * values for the Actor. If one or more of the comparisons shows that the 664 * value(s) received in the PDU differ from the current operational values, 665 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 666 */ 667static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 668{ 669 /* validate lacpdu and port */ 670 if (lacpdu && port) { 671 /* check if any parameter is different then 672 * update the port->ntt. 673 */ 674 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 675 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 676 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 677 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 678 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 679 ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) || 680 ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) || 681 ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) || 682 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION)) 683 ) { 684 port->ntt = true; 685 } 686 } 687} 688 689/** 690 * __agg_ports_are_ready - check if all ports in an aggregator are ready 691 * @aggregator: the aggregator we're looking at 692 * 693 */ 694static int __agg_ports_are_ready(struct aggregator *aggregator) 695{ 696 struct port *port; 697 int retval = 1; 698 699 if (aggregator) { 700 /* scan all ports in this aggregator to verfy if they are 701 * all ready. 702 */ 703 for (port = aggregator->lag_ports; 704 port; 705 port = port->next_port_in_aggregator) { 706 if (!(port->sm_vars & AD_PORT_READY_N)) { 707 retval = 0; 708 break; 709 } 710 } 711 } 712 713 return retval; 714} 715 716/** 717 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 718 * @aggregator: the aggregator we're looking at 719 * @val: Should the ports' ready bit be set on or off 720 * 721 */ 722static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 723{ 724 struct port *port; 725 726 for (port = aggregator->lag_ports; port; 727 port = port->next_port_in_aggregator) { 728 if (val) 729 port->sm_vars |= AD_PORT_READY; 730 else 731 port->sm_vars &= ~AD_PORT_READY; 732 } 733} 734 735static int __agg_active_ports(struct aggregator *agg) 736{ 737 struct port *port; 738 int active = 0; 739 740 for (port = agg->lag_ports; port; 741 port = port->next_port_in_aggregator) { 742 if (port->is_enabled) 743 active++; 744 } 745 746 return active; 747} 748 749/** 750 * __get_agg_bandwidth - get the total bandwidth of an aggregator 751 * @aggregator: the aggregator we're looking at 752 * 753 */ 754static u32 __get_agg_bandwidth(struct aggregator *aggregator) 755{ 756 int nports = __agg_active_ports(aggregator); 757 u32 bandwidth = 0; 758 759 if (nports) { 760 switch (__get_link_speed(aggregator->lag_ports)) { 761 case AD_LINK_SPEED_1MBPS: 762 bandwidth = nports; 763 break; 764 case AD_LINK_SPEED_10MBPS: 765 bandwidth = nports * 10; 766 break; 767 case AD_LINK_SPEED_100MBPS: 768 bandwidth = nports * 100; 769 break; 770 case AD_LINK_SPEED_1000MBPS: 771 bandwidth = nports * 1000; 772 break; 773 case AD_LINK_SPEED_2500MBPS: 774 bandwidth = nports * 2500; 775 break; 776 case AD_LINK_SPEED_5000MBPS: 777 bandwidth = nports * 5000; 778 break; 779 case AD_LINK_SPEED_10000MBPS: 780 bandwidth = nports * 10000; 781 break; 782 case AD_LINK_SPEED_14000MBPS: 783 bandwidth = nports * 14000; 784 break; 785 case AD_LINK_SPEED_20000MBPS: 786 bandwidth = nports * 20000; 787 break; 788 case AD_LINK_SPEED_25000MBPS: 789 bandwidth = nports * 25000; 790 break; 791 case AD_LINK_SPEED_40000MBPS: 792 bandwidth = nports * 40000; 793 break; 794 case AD_LINK_SPEED_50000MBPS: 795 bandwidth = nports * 50000; 796 break; 797 case AD_LINK_SPEED_56000MBPS: 798 bandwidth = nports * 56000; 799 break; 800 case AD_LINK_SPEED_100000MBPS: 801 bandwidth = nports * 100000; 802 break; 803 case AD_LINK_SPEED_200000MBPS: 804 bandwidth = nports * 200000; 805 break; 806 case AD_LINK_SPEED_400000MBPS: 807 bandwidth = nports * 400000; 808 break; 809 case AD_LINK_SPEED_800000MBPS: 810 bandwidth = nports * 800000; 811 break; 812 default: 813 bandwidth = 0; /* to silence the compiler */ 814 } 815 } 816 return bandwidth; 817} 818 819/** 820 * __get_active_agg - get the current active aggregator 821 * @aggregator: the aggregator we're looking at 822 * 823 * Caller must hold RCU lock. 824 */ 825static struct aggregator *__get_active_agg(struct aggregator *aggregator) 826{ 827 struct bonding *bond = aggregator->slave->bond; 828 struct list_head *iter; 829 struct slave *slave; 830 831 bond_for_each_slave_rcu(bond, slave, iter) 832 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 833 return &(SLAVE_AD_INFO(slave)->aggregator); 834 835 return NULL; 836} 837 838/** 839 * __update_lacpdu_from_port - update a port's lacpdu fields 840 * @port: the port we're looking at 841 */ 842static inline void __update_lacpdu_from_port(struct port *port) 843{ 844 struct lacpdu *lacpdu = &port->lacpdu; 845 const struct port_params *partner = &port->partner_oper; 846 847 /* update current actual Actor parameters 848 * lacpdu->subtype initialized 849 * lacpdu->version_number initialized 850 * lacpdu->tlv_type_actor_info initialized 851 * lacpdu->actor_information_length initialized 852 */ 853 854 lacpdu->actor_system_priority = htons(port->actor_system_priority); 855 lacpdu->actor_system = port->actor_system; 856 lacpdu->actor_key = htons(port->actor_oper_port_key); 857 lacpdu->actor_port_priority = htons(port->actor_port_priority); 858 lacpdu->actor_port = htons(port->actor_port_number); 859 lacpdu->actor_state = port->actor_oper_port_state; 860 slave_dbg(port->slave->bond->dev, port->slave->dev, 861 "update lacpdu: actor port state %x\n", 862 port->actor_oper_port_state); 863 864 /* lacpdu->reserved_3_1 initialized 865 * lacpdu->tlv_type_partner_info initialized 866 * lacpdu->partner_information_length initialized 867 */ 868 869 lacpdu->partner_system_priority = htons(partner->system_priority); 870 lacpdu->partner_system = partner->system; 871 lacpdu->partner_key = htons(partner->key); 872 lacpdu->partner_port_priority = htons(partner->port_priority); 873 lacpdu->partner_port = htons(partner->port_number); 874 lacpdu->partner_state = partner->port_state; 875 876 /* lacpdu->reserved_3_2 initialized 877 * lacpdu->tlv_type_collector_info initialized 878 * lacpdu->collector_information_length initialized 879 * collector_max_delay initialized 880 * reserved_12[12] initialized 881 * tlv_type_terminator initialized 882 * terminator_length initialized 883 * reserved_50[50] initialized 884 */ 885} 886 887/* ================= main 802.3ad protocol code ========================= */ 888 889/** 890 * ad_lacpdu_send - send out a lacpdu packet on a given port 891 * @port: the port we're looking at 892 * 893 * Returns: 0 on success 894 * < 0 on error 895 */ 896static int ad_lacpdu_send(struct port *port) 897{ 898 struct slave *slave = port->slave; 899 struct sk_buff *skb; 900 struct lacpdu_header *lacpdu_header; 901 int length = sizeof(struct lacpdu_header); 902 903 skb = dev_alloc_skb(length); 904 if (!skb) 905 return -ENOMEM; 906 907 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx); 908 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx); 909 910 skb->dev = slave->dev; 911 skb_reset_mac_header(skb); 912 skb->network_header = skb->mac_header + ETH_HLEN; 913 skb->protocol = PKT_TYPE_LACPDU; 914 skb->priority = TC_PRIO_CONTROL; 915 916 lacpdu_header = skb_put(skb, length); 917 918 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 919 /* Note: source address is set to be the member's PERMANENT address, 920 * because we use it to identify loopback lacpdus in receive. 921 */ 922 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 923 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 924 925 lacpdu_header->lacpdu = port->lacpdu; 926 927 dev_queue_xmit(skb); 928 929 return 0; 930} 931 932/** 933 * ad_marker_send - send marker information/response on a given port 934 * @port: the port we're looking at 935 * @marker: marker data to send 936 * 937 * Returns: 0 on success 938 * < 0 on error 939 */ 940static int ad_marker_send(struct port *port, struct bond_marker *marker) 941{ 942 struct slave *slave = port->slave; 943 struct sk_buff *skb; 944 struct bond_marker_header *marker_header; 945 int length = sizeof(struct bond_marker_header); 946 947 skb = dev_alloc_skb(length + 16); 948 if (!skb) 949 return -ENOMEM; 950 951 switch (marker->tlv_type) { 952 case AD_MARKER_INFORMATION_SUBTYPE: 953 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx); 954 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx); 955 break; 956 case AD_MARKER_RESPONSE_SUBTYPE: 957 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx); 958 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx); 959 break; 960 } 961 962 skb_reserve(skb, 16); 963 964 skb->dev = slave->dev; 965 skb_reset_mac_header(skb); 966 skb->network_header = skb->mac_header + ETH_HLEN; 967 skb->protocol = PKT_TYPE_LACPDU; 968 969 marker_header = skb_put(skb, length); 970 971 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 972 /* Note: source address is set to be the member's PERMANENT address, 973 * because we use it to identify loopback MARKERs in receive. 974 */ 975 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 976 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 977 978 marker_header->marker = *marker; 979 980 dev_queue_xmit(skb); 981 982 return 0; 983} 984 985/** 986 * ad_mux_machine - handle a port's mux state machine 987 * @port: the port we're looking at 988 * @update_slave_arr: Does slave array need update? 989 */ 990static void ad_mux_machine(struct port *port, bool *update_slave_arr) 991{ 992 struct bonding *bond = __get_bond_by_port(port); 993 mux_states_t last_state; 994 995 /* keep current State Machine state to compare later if it was 996 * changed 997 */ 998 last_state = port->sm_mux_state; 999 1000 if (port->sm_vars & AD_PORT_BEGIN) { 1001 port->sm_mux_state = AD_MUX_DETACHED; 1002 } else { 1003 switch (port->sm_mux_state) { 1004 case AD_MUX_DETACHED: 1005 if ((port->sm_vars & AD_PORT_SELECTED) 1006 || (port->sm_vars & AD_PORT_STANDBY)) 1007 /* if SELECTED or STANDBY */ 1008 port->sm_mux_state = AD_MUX_WAITING; 1009 break; 1010 case AD_MUX_WAITING: 1011 /* if SELECTED == FALSE return to DETACH state */ 1012 if (!(port->sm_vars & AD_PORT_SELECTED)) { 1013 port->sm_vars &= ~AD_PORT_READY_N; 1014 /* in order to withhold the Selection Logic to 1015 * check all ports READY_N value every callback 1016 * cycle to update ready variable, we check 1017 * READY_N and update READY here 1018 */ 1019 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1020 port->sm_mux_state = AD_MUX_DETACHED; 1021 break; 1022 } 1023 1024 /* check if the wait_while_timer expired */ 1025 if (port->sm_mux_timer_counter 1026 && !(--port->sm_mux_timer_counter)) 1027 port->sm_vars |= AD_PORT_READY_N; 1028 1029 /* in order to withhold the selection logic to check 1030 * all ports READY_N value every callback cycle to 1031 * update ready variable, we check READY_N and update 1032 * READY here 1033 */ 1034 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1035 1036 /* if the wait_while_timer expired, and the port is 1037 * in READY state, move to ATTACHED state 1038 */ 1039 if ((port->sm_vars & AD_PORT_READY) 1040 && !port->sm_mux_timer_counter) 1041 port->sm_mux_state = AD_MUX_ATTACHED; 1042 break; 1043 case AD_MUX_ATTACHED: 1044 /* check also if agg_select_timer expired (so the 1045 * edable port will take place only after this timer) 1046 */ 1047 if ((port->sm_vars & AD_PORT_SELECTED) && 1048 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) && 1049 !__check_agg_selection_timer(port)) { 1050 if (port->aggregator->is_active) { 1051 int state = AD_MUX_COLLECTING_DISTRIBUTING; 1052 1053 if (!bond->params.coupled_control) 1054 state = AD_MUX_COLLECTING; 1055 port->sm_mux_state = state; 1056 } 1057 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 1058 (port->sm_vars & AD_PORT_STANDBY)) { 1059 /* if UNSELECTED or STANDBY */ 1060 port->sm_vars &= ~AD_PORT_READY_N; 1061 /* in order to withhold the selection logic to 1062 * check all ports READY_N value every callback 1063 * cycle to update ready variable, we check 1064 * READY_N and update READY here 1065 */ 1066 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1067 port->sm_mux_state = AD_MUX_DETACHED; 1068 } else if (port->aggregator->is_active) { 1069 port->actor_oper_port_state |= 1070 LACP_STATE_SYNCHRONIZATION; 1071 } 1072 break; 1073 case AD_MUX_COLLECTING_DISTRIBUTING: 1074 if (!__port_move_to_attached_state(port)) { 1075 /* if port state hasn't changed make 1076 * sure that a collecting distributing 1077 * port in an active aggregator is enabled 1078 */ 1079 if (port->aggregator->is_active && 1080 !__port_is_collecting_distributing(port)) { 1081 __enable_port(port); 1082 *update_slave_arr = true; 1083 } 1084 } 1085 break; 1086 case AD_MUX_COLLECTING: 1087 if (!__port_move_to_attached_state(port)) { 1088 if ((port->sm_vars & AD_PORT_SELECTED) && 1089 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) && 1090 (port->partner_oper.port_state & LACP_STATE_COLLECTING)) { 1091 port->sm_mux_state = AD_MUX_DISTRIBUTING; 1092 } else { 1093 /* If port state hasn't changed, make sure that a collecting 1094 * port is enabled for an active aggregator. 1095 */ 1096 struct slave *slave = port->slave; 1097 1098 if (port->aggregator->is_active && 1099 bond_is_slave_rx_disabled(slave)) { 1100 ad_enable_collecting(port); 1101 *update_slave_arr = true; 1102 } 1103 } 1104 } 1105 break; 1106 case AD_MUX_DISTRIBUTING: 1107 if (!(port->sm_vars & AD_PORT_SELECTED) || 1108 (port->sm_vars & AD_PORT_STANDBY) || 1109 !(port->partner_oper.port_state & LACP_STATE_COLLECTING) || 1110 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) || 1111 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) { 1112 port->sm_mux_state = AD_MUX_COLLECTING; 1113 } else { 1114 /* if port state hasn't changed make 1115 * sure that a collecting distributing 1116 * port in an active aggregator is enabled 1117 */ 1118 if (port->aggregator && 1119 port->aggregator->is_active && 1120 !__port_is_collecting_distributing(port)) { 1121 __enable_port(port); 1122 *update_slave_arr = true; 1123 } 1124 } 1125 break; 1126 default: 1127 break; 1128 } 1129 } 1130 1131 /* check if the state machine was changed */ 1132 if (port->sm_mux_state != last_state) { 1133 slave_dbg(port->slave->bond->dev, port->slave->dev, 1134 "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", 1135 port->actor_port_number, 1136 last_state, 1137 port->sm_mux_state); 1138 switch (port->sm_mux_state) { 1139 case AD_MUX_DETACHED: 1140 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 1141 ad_disable_collecting_distributing(port, 1142 update_slave_arr); 1143 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 1144 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1145 port->ntt = true; 1146 break; 1147 case AD_MUX_WAITING: 1148 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1149 break; 1150 case AD_MUX_ATTACHED: 1151 if (port->aggregator->is_active) 1152 port->actor_oper_port_state |= 1153 LACP_STATE_SYNCHRONIZATION; 1154 else 1155 port->actor_oper_port_state &= 1156 ~LACP_STATE_SYNCHRONIZATION; 1157 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 1158 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1159 ad_disable_collecting_distributing(port, 1160 update_slave_arr); 1161 port->ntt = true; 1162 break; 1163 case AD_MUX_COLLECTING_DISTRIBUTING: 1164 port->actor_oper_port_state |= LACP_STATE_COLLECTING; 1165 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING; 1166 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION; 1167 ad_enable_collecting_distributing(port, 1168 update_slave_arr); 1169 port->ntt = true; 1170 break; 1171 case AD_MUX_COLLECTING: 1172 port->actor_oper_port_state |= LACP_STATE_COLLECTING; 1173 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1174 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION; 1175 ad_enable_collecting(port); 1176 ad_disable_distributing(port, update_slave_arr); 1177 port->ntt = true; 1178 break; 1179 case AD_MUX_DISTRIBUTING: 1180 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING; 1181 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION; 1182 ad_enable_collecting_distributing(port, 1183 update_slave_arr); 1184 break; 1185 default: 1186 break; 1187 } 1188 } 1189} 1190 1191/** 1192 * ad_rx_machine - handle a port's rx State Machine 1193 * @lacpdu: the lacpdu we've received 1194 * @port: the port we're looking at 1195 * 1196 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1197 * CURRENT. If timer expired set the state machine in the proper state. 1198 * In other cases, this function checks if we need to switch to other state. 1199 */ 1200static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1201{ 1202 rx_states_t last_state; 1203 1204 /* keep current State Machine state to compare later if it was 1205 * changed 1206 */ 1207 last_state = port->sm_rx_state; 1208 1209 if (lacpdu) { 1210 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx); 1211 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx); 1212 } 1213 /* check if state machine should change state */ 1214 1215 /* first, check if port was reinitialized */ 1216 if (port->sm_vars & AD_PORT_BEGIN) { 1217 port->sm_rx_state = AD_RX_INITIALIZE; 1218 port->sm_vars |= AD_PORT_CHURNED; 1219 /* check if port is not enabled */ 1220 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) 1221 port->sm_rx_state = AD_RX_PORT_DISABLED; 1222 /* check if new lacpdu arrived */ 1223 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1224 (port->sm_rx_state == AD_RX_DEFAULTED) || 1225 (port->sm_rx_state == AD_RX_CURRENT))) { 1226 if (port->sm_rx_state != AD_RX_CURRENT) 1227 port->sm_vars |= AD_PORT_CHURNED; 1228 port->sm_rx_timer_counter = 0; 1229 port->sm_rx_state = AD_RX_CURRENT; 1230 } else { 1231 /* if timer is on, and if it is expired */ 1232 if (port->sm_rx_timer_counter && 1233 !(--port->sm_rx_timer_counter)) { 1234 switch (port->sm_rx_state) { 1235 case AD_RX_EXPIRED: 1236 port->sm_rx_state = AD_RX_DEFAULTED; 1237 break; 1238 case AD_RX_CURRENT: 1239 port->sm_rx_state = AD_RX_EXPIRED; 1240 break; 1241 default: 1242 break; 1243 } 1244 } else { 1245 /* if no lacpdu arrived and no timer is on */ 1246 switch (port->sm_rx_state) { 1247 case AD_RX_PORT_DISABLED: 1248 if (port->is_enabled && 1249 (port->sm_vars & AD_PORT_LACP_ENABLED)) 1250 port->sm_rx_state = AD_RX_EXPIRED; 1251 else if (port->is_enabled 1252 && ((port->sm_vars 1253 & AD_PORT_LACP_ENABLED) == 0)) 1254 port->sm_rx_state = AD_RX_LACP_DISABLED; 1255 break; 1256 default: 1257 break; 1258 1259 } 1260 } 1261 } 1262 1263 /* check if the State machine was changed or new lacpdu arrived */ 1264 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1265 slave_dbg(port->slave->bond->dev, port->slave->dev, 1266 "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", 1267 port->actor_port_number, 1268 last_state, 1269 port->sm_rx_state); 1270 switch (port->sm_rx_state) { 1271 case AD_RX_INITIALIZE: 1272 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1273 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1274 else 1275 port->sm_vars |= AD_PORT_LACP_ENABLED; 1276 port->sm_vars &= ~AD_PORT_SELECTED; 1277 __record_default(port); 1278 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1279 port->sm_rx_state = AD_RX_PORT_DISABLED; 1280 1281 fallthrough; 1282 case AD_RX_PORT_DISABLED: 1283 port->sm_vars &= ~AD_PORT_MATCHED; 1284 break; 1285 case AD_RX_LACP_DISABLED: 1286 port->sm_vars &= ~AD_PORT_SELECTED; 1287 __record_default(port); 1288 port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION; 1289 port->sm_vars |= AD_PORT_MATCHED; 1290 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1291 break; 1292 case AD_RX_EXPIRED: 1293 /* Reset of the Synchronization flag (Standard 43.4.12) 1294 * This reset cause to disable this port in the 1295 * COLLECTING_DISTRIBUTING state of the mux machine in 1296 * case of EXPIRED even if LINK_DOWN didn't arrive for 1297 * the port. 1298 */ 1299 port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION; 1300 port->sm_vars &= ~AD_PORT_MATCHED; 1301 port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT; 1302 port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY; 1303 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1304 port->actor_oper_port_state |= LACP_STATE_EXPIRED; 1305 port->sm_vars |= AD_PORT_CHURNED; 1306 break; 1307 case AD_RX_DEFAULTED: 1308 __update_default_selected(port); 1309 __record_default(port); 1310 port->sm_vars |= AD_PORT_MATCHED; 1311 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1312 break; 1313 case AD_RX_CURRENT: 1314 /* detect loopback situation */ 1315 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1316 &(port->actor_system))) { 1317 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n" 1318 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n"); 1319 return; 1320 } 1321 __update_selected(lacpdu, port); 1322 __update_ntt(lacpdu, port); 1323 __record_pdu(lacpdu, port); 1324 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)); 1325 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1326 break; 1327 default: 1328 break; 1329 } 1330 } 1331} 1332 1333/** 1334 * ad_churn_machine - handle port churn's state machine 1335 * @port: the port we're looking at 1336 * 1337 */ 1338static void ad_churn_machine(struct port *port) 1339{ 1340 if (port->sm_vars & AD_PORT_CHURNED) { 1341 port->sm_vars &= ~AD_PORT_CHURNED; 1342 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1343 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1344 port->sm_churn_actor_timer_counter = 1345 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1346 port->sm_churn_partner_timer_counter = 1347 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1348 return; 1349 } 1350 if (port->sm_churn_actor_timer_counter && 1351 !(--port->sm_churn_actor_timer_counter) && 1352 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1353 if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) { 1354 port->sm_churn_actor_state = AD_NO_CHURN; 1355 } else { 1356 port->churn_actor_count++; 1357 port->sm_churn_actor_state = AD_CHURN; 1358 } 1359 } 1360 if (port->sm_churn_partner_timer_counter && 1361 !(--port->sm_churn_partner_timer_counter) && 1362 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1363 if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) { 1364 port->sm_churn_partner_state = AD_NO_CHURN; 1365 } else { 1366 port->churn_partner_count++; 1367 port->sm_churn_partner_state = AD_CHURN; 1368 } 1369 } 1370} 1371 1372/** 1373 * ad_tx_machine - handle a port's tx state machine 1374 * @port: the port we're looking at 1375 */ 1376static void ad_tx_machine(struct port *port) 1377{ 1378 /* check if tx timer expired, to verify that we do not send more than 1379 * 3 packets per second 1380 */ 1381 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1382 /* check if there is something to send */ 1383 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1384 __update_lacpdu_from_port(port); 1385 1386 if (ad_lacpdu_send(port) >= 0) { 1387 slave_dbg(port->slave->bond->dev, 1388 port->slave->dev, 1389 "Sent LACPDU on port %d\n", 1390 port->actor_port_number); 1391 1392 /* mark ntt as false, so it will not be sent 1393 * again until demanded 1394 */ 1395 port->ntt = false; 1396 } 1397 } 1398 /* restart tx timer(to verify that we will not exceed 1399 * AD_MAX_TX_IN_SECOND 1400 */ 1401 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1402 } 1403} 1404 1405/** 1406 * ad_periodic_machine - handle a port's periodic state machine 1407 * @port: the port we're looking at 1408 * @bond_params: bond parameters we will use 1409 * 1410 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1411 */ 1412static void ad_periodic_machine(struct port *port, struct bond_params *bond_params) 1413{ 1414 periodic_states_t last_state; 1415 1416 /* keep current state machine state to compare later if it was changed */ 1417 last_state = port->sm_periodic_state; 1418 1419 /* check if port was reinitialized */ 1420 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1421 (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) || 1422 !bond_params->lacp_active) { 1423 port->sm_periodic_state = AD_NO_PERIODIC; 1424 } 1425 /* check if state machine should change state */ 1426 else if (port->sm_periodic_timer_counter) { 1427 /* check if periodic state machine expired */ 1428 if (!(--port->sm_periodic_timer_counter)) { 1429 /* if expired then do tx */ 1430 port->sm_periodic_state = AD_PERIODIC_TX; 1431 } else { 1432 /* If not expired, check if there is some new timeout 1433 * parameter from the partner state 1434 */ 1435 switch (port->sm_periodic_state) { 1436 case AD_FAST_PERIODIC: 1437 if (!(port->partner_oper.port_state 1438 & LACP_STATE_LACP_TIMEOUT)) 1439 port->sm_periodic_state = AD_SLOW_PERIODIC; 1440 break; 1441 case AD_SLOW_PERIODIC: 1442 if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) { 1443 port->sm_periodic_timer_counter = 0; 1444 port->sm_periodic_state = AD_PERIODIC_TX; 1445 } 1446 break; 1447 default: 1448 break; 1449 } 1450 } 1451 } else { 1452 switch (port->sm_periodic_state) { 1453 case AD_NO_PERIODIC: 1454 port->sm_periodic_state = AD_FAST_PERIODIC; 1455 break; 1456 case AD_PERIODIC_TX: 1457 if (!(port->partner_oper.port_state & 1458 LACP_STATE_LACP_TIMEOUT)) 1459 port->sm_periodic_state = AD_SLOW_PERIODIC; 1460 else 1461 port->sm_periodic_state = AD_FAST_PERIODIC; 1462 break; 1463 default: 1464 break; 1465 } 1466 } 1467 1468 /* check if the state machine was changed */ 1469 if (port->sm_periodic_state != last_state) { 1470 slave_dbg(port->slave->bond->dev, port->slave->dev, 1471 "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1472 port->actor_port_number, last_state, 1473 port->sm_periodic_state); 1474 switch (port->sm_periodic_state) { 1475 case AD_NO_PERIODIC: 1476 port->sm_periodic_timer_counter = 0; 1477 break; 1478 case AD_FAST_PERIODIC: 1479 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1480 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1481 break; 1482 case AD_SLOW_PERIODIC: 1483 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1484 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1485 break; 1486 case AD_PERIODIC_TX: 1487 port->ntt = true; 1488 break; 1489 default: 1490 break; 1491 } 1492 } 1493} 1494 1495/** 1496 * ad_port_selection_logic - select aggregation groups 1497 * @port: the port we're looking at 1498 * @update_slave_arr: Does slave array need update? 1499 * 1500 * Select aggregation groups, and assign each port for it's aggregetor. The 1501 * selection logic is called in the inititalization (after all the handshkes), 1502 * and after every lacpdu receive (if selected is off). 1503 */ 1504static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1505{ 1506 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1507 struct port *last_port = NULL, *curr_port; 1508 struct list_head *iter; 1509 struct bonding *bond; 1510 struct slave *slave; 1511 int found = 0; 1512 1513 /* if the port is already Selected, do nothing */ 1514 if (port->sm_vars & AD_PORT_SELECTED) 1515 return; 1516 1517 bond = __get_bond_by_port(port); 1518 1519 /* if the port is connected to other aggregator, detach it */ 1520 if (port->aggregator) { 1521 /* detach the port from its former aggregator */ 1522 temp_aggregator = port->aggregator; 1523 for (curr_port = temp_aggregator->lag_ports; curr_port; 1524 last_port = curr_port, 1525 curr_port = curr_port->next_port_in_aggregator) { 1526 if (curr_port == port) { 1527 temp_aggregator->num_of_ports--; 1528 /* if it is the first port attached to the 1529 * aggregator 1530 */ 1531 if (!last_port) { 1532 temp_aggregator->lag_ports = 1533 port->next_port_in_aggregator; 1534 } else { 1535 /* not the first port attached to the 1536 * aggregator 1537 */ 1538 last_port->next_port_in_aggregator = 1539 port->next_port_in_aggregator; 1540 } 1541 1542 /* clear the port's relations to this 1543 * aggregator 1544 */ 1545 port->aggregator = NULL; 1546 port->next_port_in_aggregator = NULL; 1547 port->actor_port_aggregator_identifier = 0; 1548 1549 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n", 1550 port->actor_port_number, 1551 temp_aggregator->aggregator_identifier); 1552 /* if the aggregator is empty, clear its 1553 * parameters, and set it ready to be attached 1554 */ 1555 if (!temp_aggregator->lag_ports) 1556 ad_clear_agg(temp_aggregator); 1557 break; 1558 } 1559 } 1560 if (!curr_port) { 1561 /* meaning: the port was related to an aggregator 1562 * but was not on the aggregator port list 1563 */ 1564 net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n", 1565 port->slave->bond->dev->name, 1566 port->slave->dev->name, 1567 port->actor_port_number, 1568 port->aggregator->aggregator_identifier); 1569 } 1570 } 1571 /* search on all aggregators for a suitable aggregator for this port */ 1572 bond_for_each_slave(bond, slave, iter) { 1573 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1574 1575 /* keep a free aggregator for later use(if needed) */ 1576 if (!aggregator->lag_ports) { 1577 if (!free_aggregator) 1578 free_aggregator = aggregator; 1579 continue; 1580 } 1581 /* check if current aggregator suits us */ 1582 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1583 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1584 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1585 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1586 ) && 1587 ((__agg_has_partner(aggregator) && /* partner answers */ 1588 !aggregator->is_individual) /* but is not individual OR */ 1589 ) 1590 ) { 1591 /* attach to the founded aggregator */ 1592 port->aggregator = aggregator; 1593 port->actor_port_aggregator_identifier = 1594 port->aggregator->aggregator_identifier; 1595 port->next_port_in_aggregator = aggregator->lag_ports; 1596 port->aggregator->num_of_ports++; 1597 aggregator->lag_ports = port; 1598 slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n", 1599 port->actor_port_number, 1600 port->aggregator->aggregator_identifier); 1601 1602 /* mark this port as selected */ 1603 port->sm_vars |= AD_PORT_SELECTED; 1604 found = 1; 1605 break; 1606 } 1607 } 1608 1609 /* the port couldn't find an aggregator - attach it to a new 1610 * aggregator 1611 */ 1612 if (!found) { 1613 if (free_aggregator) { 1614 /* assign port a new aggregator */ 1615 port->aggregator = free_aggregator; 1616 port->actor_port_aggregator_identifier = 1617 port->aggregator->aggregator_identifier; 1618 1619 /* update the new aggregator's parameters 1620 * if port was responsed from the end-user 1621 */ 1622 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1623 /* if port is full duplex */ 1624 port->aggregator->is_individual = false; 1625 else 1626 port->aggregator->is_individual = true; 1627 1628 port->aggregator->actor_admin_aggregator_key = 1629 port->actor_admin_port_key; 1630 port->aggregator->actor_oper_aggregator_key = 1631 port->actor_oper_port_key; 1632 port->aggregator->partner_system = 1633 port->partner_oper.system; 1634 port->aggregator->partner_system_priority = 1635 port->partner_oper.system_priority; 1636 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1637 port->aggregator->receive_state = 1; 1638 port->aggregator->transmit_state = 1; 1639 port->aggregator->lag_ports = port; 1640 port->aggregator->num_of_ports++; 1641 1642 /* mark this port as selected */ 1643 port->sm_vars |= AD_PORT_SELECTED; 1644 1645 slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n", 1646 port->actor_port_number, 1647 port->aggregator->aggregator_identifier); 1648 } else { 1649 slave_err(bond->dev, port->slave->dev, 1650 "Port %d did not find a suitable aggregator\n", 1651 port->actor_port_number); 1652 return; 1653 } 1654 } 1655 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1656 * in all aggregator's ports, else set ready=FALSE in all 1657 * aggregator's ports 1658 */ 1659 __set_agg_ports_ready(port->aggregator, 1660 __agg_ports_are_ready(port->aggregator)); 1661 1662 aggregator = __get_first_agg(port); 1663 ad_agg_selection_logic(aggregator, update_slave_arr); 1664 1665 if (!port->aggregator->is_active) 1666 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 1667} 1668 1669/* Decide if "agg" is a better choice for the new active aggregator that 1670 * the current best, according to the ad_select policy. 1671 */ 1672static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1673 struct aggregator *curr) 1674{ 1675 /* 0. If no best, select current. 1676 * 1677 * 1. If the current agg is not individual, and the best is 1678 * individual, select current. 1679 * 1680 * 2. If current agg is individual and the best is not, keep best. 1681 * 1682 * 3. Therefore, current and best are both individual or both not 1683 * individual, so: 1684 * 1685 * 3a. If current agg partner replied, and best agg partner did not, 1686 * select current. 1687 * 1688 * 3b. If current agg partner did not reply and best agg partner 1689 * did reply, keep best. 1690 * 1691 * 4. Therefore, current and best both have partner replies or 1692 * both do not, so perform selection policy: 1693 * 1694 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1695 * select by bandwidth. 1696 * 1697 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1698 */ 1699 if (!best) 1700 return curr; 1701 1702 if (!curr->is_individual && best->is_individual) 1703 return curr; 1704 1705 if (curr->is_individual && !best->is_individual) 1706 return best; 1707 1708 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1709 return curr; 1710 1711 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1712 return best; 1713 1714 switch (__get_agg_selection_mode(curr->lag_ports)) { 1715 case BOND_AD_COUNT: 1716 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1717 return curr; 1718 1719 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1720 return best; 1721 1722 fallthrough; 1723 case BOND_AD_STABLE: 1724 case BOND_AD_BANDWIDTH: 1725 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1726 return curr; 1727 1728 break; 1729 1730 default: 1731 net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n", 1732 curr->slave->bond->dev->name, 1733 curr->slave->dev->name, 1734 __get_agg_selection_mode(curr->lag_ports)); 1735 break; 1736 } 1737 1738 return best; 1739} 1740 1741static int agg_device_up(const struct aggregator *agg) 1742{ 1743 struct port *port = agg->lag_ports; 1744 1745 if (!port) 1746 return 0; 1747 1748 for (port = agg->lag_ports; port; 1749 port = port->next_port_in_aggregator) { 1750 if (netif_running(port->slave->dev) && 1751 netif_carrier_ok(port->slave->dev)) 1752 return 1; 1753 } 1754 1755 return 0; 1756} 1757 1758/** 1759 * ad_agg_selection_logic - select an aggregation group for a team 1760 * @agg: the aggregator we're looking at 1761 * @update_slave_arr: Does slave array need update? 1762 * 1763 * It is assumed that only one aggregator may be selected for a team. 1764 * 1765 * The logic of this function is to select the aggregator according to 1766 * the ad_select policy: 1767 * 1768 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1769 * it, and to reselect the active aggregator only if the previous 1770 * aggregator has no more ports related to it. 1771 * 1772 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1773 * bandwidth, and reselect whenever a link state change takes place or the 1774 * set of slaves in the bond changes. 1775 * 1776 * BOND_AD_COUNT: select the aggregator with largest number of ports 1777 * (slaves), and reselect whenever a link state change takes place or the 1778 * set of slaves in the bond changes. 1779 * 1780 * FIXME: this function MUST be called with the first agg in the bond, or 1781 * __get_active_agg() won't work correctly. This function should be better 1782 * called with the bond itself, and retrieve the first agg from it. 1783 */ 1784static void ad_agg_selection_logic(struct aggregator *agg, 1785 bool *update_slave_arr) 1786{ 1787 struct aggregator *best, *active, *origin; 1788 struct bonding *bond = agg->slave->bond; 1789 struct list_head *iter; 1790 struct slave *slave; 1791 struct port *port; 1792 1793 rcu_read_lock(); 1794 origin = agg; 1795 active = __get_active_agg(agg); 1796 best = (active && agg_device_up(active)) ? active : NULL; 1797 1798 bond_for_each_slave_rcu(bond, slave, iter) { 1799 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1800 1801 agg->is_active = 0; 1802 1803 if (__agg_active_ports(agg) && agg_device_up(agg)) 1804 best = ad_agg_selection_test(best, agg); 1805 } 1806 1807 if (best && 1808 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1809 /* For the STABLE policy, don't replace the old active 1810 * aggregator if it's still active (it has an answering 1811 * partner) or if both the best and active don't have an 1812 * answering partner. 1813 */ 1814 if (active && active->lag_ports && 1815 __agg_active_ports(active) && 1816 (__agg_has_partner(active) || 1817 (!__agg_has_partner(active) && 1818 !__agg_has_partner(best)))) { 1819 if (!(!active->actor_oper_aggregator_key && 1820 best->actor_oper_aggregator_key)) { 1821 best = NULL; 1822 active->is_active = 1; 1823 } 1824 } 1825 } 1826 1827 if (best && (best == active)) { 1828 best = NULL; 1829 active->is_active = 1; 1830 } 1831 1832 /* if there is new best aggregator, activate it */ 1833 if (best) { 1834 netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1835 best->slave ? best->slave->dev->name : "NULL", 1836 best->aggregator_identifier, best->num_of_ports, 1837 best->actor_oper_aggregator_key, 1838 best->partner_oper_aggregator_key, 1839 best->is_individual, best->is_active); 1840 netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n", 1841 best->slave ? best->slave->dev->name : "NULL", 1842 best->lag_ports, best->slave); 1843 1844 bond_for_each_slave_rcu(bond, slave, iter) { 1845 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1846 1847 slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1848 agg->aggregator_identifier, agg->num_of_ports, 1849 agg->actor_oper_aggregator_key, 1850 agg->partner_oper_aggregator_key, 1851 agg->is_individual, agg->is_active); 1852 } 1853 1854 /* check if any partner replies */ 1855 if (best->is_individual) 1856 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1857 bond->dev->name); 1858 1859 best->is_active = 1; 1860 netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n", 1861 best->slave ? best->slave->dev->name : "NULL", 1862 best->aggregator_identifier); 1863 netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1864 best->slave ? best->slave->dev->name : "NULL", 1865 best->aggregator_identifier, best->num_of_ports, 1866 best->actor_oper_aggregator_key, 1867 best->partner_oper_aggregator_key, 1868 best->is_individual, best->is_active); 1869 1870 /* disable the ports that were related to the former 1871 * active_aggregator 1872 */ 1873 if (active) { 1874 for (port = active->lag_ports; port; 1875 port = port->next_port_in_aggregator) { 1876 __disable_port(port); 1877 } 1878 } 1879 /* Slave array needs update. */ 1880 *update_slave_arr = true; 1881 } 1882 1883 /* if the selected aggregator is of join individuals 1884 * (partner_system is NULL), enable their ports 1885 */ 1886 active = __get_active_agg(origin); 1887 1888 if (active) { 1889 if (!__agg_has_partner(active)) { 1890 for (port = active->lag_ports; port; 1891 port = port->next_port_in_aggregator) { 1892 __enable_port(port); 1893 } 1894 *update_slave_arr = true; 1895 } 1896 } 1897 1898 rcu_read_unlock(); 1899 1900 bond_3ad_set_carrier(bond); 1901} 1902 1903/** 1904 * ad_clear_agg - clear a given aggregator's parameters 1905 * @aggregator: the aggregator we're looking at 1906 */ 1907static void ad_clear_agg(struct aggregator *aggregator) 1908{ 1909 if (aggregator) { 1910 aggregator->is_individual = false; 1911 aggregator->actor_admin_aggregator_key = 0; 1912 aggregator->actor_oper_aggregator_key = 0; 1913 eth_zero_addr(aggregator->partner_system.mac_addr_value); 1914 aggregator->partner_system_priority = 0; 1915 aggregator->partner_oper_aggregator_key = 0; 1916 aggregator->receive_state = 0; 1917 aggregator->transmit_state = 0; 1918 aggregator->lag_ports = NULL; 1919 aggregator->is_active = 0; 1920 aggregator->num_of_ports = 0; 1921 pr_debug("%s: LAG %d was cleared\n", 1922 aggregator->slave ? 1923 aggregator->slave->dev->name : "NULL", 1924 aggregator->aggregator_identifier); 1925 } 1926} 1927 1928/** 1929 * ad_initialize_agg - initialize a given aggregator's parameters 1930 * @aggregator: the aggregator we're looking at 1931 */ 1932static void ad_initialize_agg(struct aggregator *aggregator) 1933{ 1934 if (aggregator) { 1935 ad_clear_agg(aggregator); 1936 1937 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); 1938 aggregator->aggregator_identifier = 0; 1939 aggregator->slave = NULL; 1940 } 1941} 1942 1943/** 1944 * ad_initialize_port - initialize a given port's parameters 1945 * @port: the port we're looking at 1946 * @lacp_fast: boolean. whether fast periodic should be used 1947 */ 1948static void ad_initialize_port(struct port *port, int lacp_fast) 1949{ 1950 static const struct port_params tmpl = { 1951 .system_priority = 0xffff, 1952 .key = 1, 1953 .port_number = 1, 1954 .port_priority = 0xff, 1955 .port_state = 1, 1956 }; 1957 static const struct lacpdu lacpdu = { 1958 .subtype = 0x01, 1959 .version_number = 0x01, 1960 .tlv_type_actor_info = 0x01, 1961 .actor_information_length = 0x14, 1962 .tlv_type_partner_info = 0x02, 1963 .partner_information_length = 0x14, 1964 .tlv_type_collector_info = 0x03, 1965 .collector_information_length = 0x10, 1966 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1967 }; 1968 1969 if (port) { 1970 port->actor_port_priority = 0xff; 1971 port->actor_port_aggregator_identifier = 0; 1972 port->ntt = false; 1973 port->actor_admin_port_state = LACP_STATE_AGGREGATION | 1974 LACP_STATE_LACP_ACTIVITY; 1975 port->actor_oper_port_state = LACP_STATE_AGGREGATION | 1976 LACP_STATE_LACP_ACTIVITY; 1977 1978 if (lacp_fast) 1979 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; 1980 1981 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1982 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1983 1984 port->is_enabled = true; 1985 /* private parameters */ 1986 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1987 port->sm_rx_state = 0; 1988 port->sm_rx_timer_counter = 0; 1989 port->sm_periodic_state = 0; 1990 port->sm_periodic_timer_counter = 0; 1991 port->sm_mux_state = 0; 1992 port->sm_mux_timer_counter = 0; 1993 port->sm_tx_state = 0; 1994 port->aggregator = NULL; 1995 port->next_port_in_aggregator = NULL; 1996 port->transaction_id = 0; 1997 1998 port->sm_churn_actor_timer_counter = 0; 1999 port->sm_churn_actor_state = 0; 2000 port->churn_actor_count = 0; 2001 port->sm_churn_partner_timer_counter = 0; 2002 port->sm_churn_partner_state = 0; 2003 port->churn_partner_count = 0; 2004 2005 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 2006 } 2007} 2008 2009/** 2010 * ad_enable_collecting - enable a port's receive 2011 * @port: the port we're looking at 2012 * 2013 * Enable @port if it's in an active aggregator 2014 */ 2015static void ad_enable_collecting(struct port *port) 2016{ 2017 if (port->aggregator->is_active) { 2018 struct slave *slave = port->slave; 2019 2020 slave_dbg(slave->bond->dev, slave->dev, 2021 "Enabling collecting on port %d (LAG %d)\n", 2022 port->actor_port_number, 2023 port->aggregator->aggregator_identifier); 2024 __enable_collecting_port(port); 2025 } 2026} 2027 2028/** 2029 * ad_disable_distributing - disable a port's transmit 2030 * @port: the port we're looking at 2031 * @update_slave_arr: Does slave array need update? 2032 */ 2033static void ad_disable_distributing(struct port *port, bool *update_slave_arr) 2034{ 2035 if (port->aggregator && __agg_has_partner(port->aggregator)) { 2036 slave_dbg(port->slave->bond->dev, port->slave->dev, 2037 "Disabling distributing on port %d (LAG %d)\n", 2038 port->actor_port_number, 2039 port->aggregator->aggregator_identifier); 2040 __disable_distributing_port(port); 2041 /* Slave array needs an update */ 2042 *update_slave_arr = true; 2043 } 2044} 2045 2046/** 2047 * ad_enable_collecting_distributing - enable a port's transmit/receive 2048 * @port: the port we're looking at 2049 * @update_slave_arr: Does slave array need update? 2050 * 2051 * Enable @port if it's in an active aggregator 2052 */ 2053static void ad_enable_collecting_distributing(struct port *port, 2054 bool *update_slave_arr) 2055{ 2056 if (port->aggregator->is_active) { 2057 slave_dbg(port->slave->bond->dev, port->slave->dev, 2058 "Enabling port %d (LAG %d)\n", 2059 port->actor_port_number, 2060 port->aggregator->aggregator_identifier); 2061 __enable_port(port); 2062 /* Slave array needs update */ 2063 *update_slave_arr = true; 2064 } 2065} 2066 2067/** 2068 * ad_disable_collecting_distributing - disable a port's transmit/receive 2069 * @port: the port we're looking at 2070 * @update_slave_arr: Does slave array need update? 2071 */ 2072static void ad_disable_collecting_distributing(struct port *port, 2073 bool *update_slave_arr) 2074{ 2075 if (port->aggregator && __agg_has_partner(port->aggregator)) { 2076 slave_dbg(port->slave->bond->dev, port->slave->dev, 2077 "Disabling port %d (LAG %d)\n", 2078 port->actor_port_number, 2079 port->aggregator->aggregator_identifier); 2080 __disable_port(port); 2081 /* Slave array needs an update */ 2082 *update_slave_arr = true; 2083 } 2084} 2085 2086/** 2087 * ad_marker_info_received - handle receive of a Marker information frame 2088 * @marker_info: Marker info received 2089 * @port: the port we're looking at 2090 */ 2091static void ad_marker_info_received(struct bond_marker *marker_info, 2092 struct port *port) 2093{ 2094 struct bond_marker marker; 2095 2096 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx); 2097 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx); 2098 2099 /* copy the received marker data to the response marker */ 2100 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 2101 /* change the marker subtype to marker response */ 2102 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 2103 2104 /* send the marker response */ 2105 if (ad_marker_send(port, &marker) >= 0) 2106 slave_dbg(port->slave->bond->dev, port->slave->dev, 2107 "Sent Marker Response on port %d\n", 2108 port->actor_port_number); 2109} 2110 2111/** 2112 * ad_marker_response_received - handle receive of a marker response frame 2113 * @marker: marker PDU received 2114 * @port: the port we're looking at 2115 * 2116 * This function does nothing since we decided not to implement send and handle 2117 * response for marker PDU's, in this stage, but only to respond to marker 2118 * information. 2119 */ 2120static void ad_marker_response_received(struct bond_marker *marker, 2121 struct port *port) 2122{ 2123 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx); 2124 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx); 2125 2126 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 2127} 2128 2129/* ========= AD exported functions to the main bonding code ========= */ 2130 2131/* Check aggregators status in team every T seconds */ 2132#define AD_AGGREGATOR_SELECTION_TIMER 8 2133 2134/** 2135 * bond_3ad_initiate_agg_selection - initate aggregator selection 2136 * @bond: bonding struct 2137 * @timeout: timeout value to set 2138 * 2139 * Set the aggregation selection timer, to initiate an agg selection in 2140 * the very near future. Called during first initialization, and during 2141 * any down to up transitions of the bond. 2142 */ 2143void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 2144{ 2145 atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout); 2146} 2147 2148/** 2149 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 2150 * @bond: bonding struct to work on 2151 * 2152 * Can be called only after the mac address of the bond is set. 2153 */ 2154void bond_3ad_initialize(struct bonding *bond) 2155{ 2156 BOND_AD_INFO(bond).aggregator_identifier = 0; 2157 BOND_AD_INFO(bond).system.sys_priority = 2158 bond->params.ad_actor_sys_prio; 2159 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2160 BOND_AD_INFO(bond).system.sys_mac_addr = 2161 *((struct mac_addr *)bond->dev->dev_addr); 2162 else 2163 BOND_AD_INFO(bond).system.sys_mac_addr = 2164 *((struct mac_addr *)bond->params.ad_actor_system); 2165 2166 bond_3ad_initiate_agg_selection(bond, 2167 AD_AGGREGATOR_SELECTION_TIMER * 2168 ad_ticks_per_sec); 2169} 2170 2171/** 2172 * bond_3ad_bind_slave - initialize a slave's port 2173 * @slave: slave struct to work on 2174 * 2175 * Returns: 0 on success 2176 * < 0 on error 2177 */ 2178void bond_3ad_bind_slave(struct slave *slave) 2179{ 2180 struct bonding *bond = bond_get_bond_by_slave(slave); 2181 struct port *port; 2182 struct aggregator *aggregator; 2183 2184 /* check that the slave has not been initialized yet. */ 2185 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 2186 2187 /* port initialization */ 2188 port = &(SLAVE_AD_INFO(slave)->port); 2189 2190 ad_initialize_port(port, bond->params.lacp_fast); 2191 2192 port->slave = slave; 2193 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 2194 /* key is determined according to the link speed, duplex and 2195 * user key 2196 */ 2197 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 2198 ad_update_actor_keys(port, false); 2199 /* actor system is the bond's system */ 2200 __ad_actor_update_port(port); 2201 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 2202 * lacpdu's are sent in one second) 2203 */ 2204 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2205 2206 __disable_port(port); 2207 2208 /* aggregator initialization */ 2209 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2210 2211 ad_initialize_agg(aggregator); 2212 2213 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2214 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2215 aggregator->slave = slave; 2216 aggregator->is_active = 0; 2217 aggregator->num_of_ports = 0; 2218 } 2219} 2220 2221/** 2222 * bond_3ad_unbind_slave - deinitialize a slave's port 2223 * @slave: slave struct to work on 2224 * 2225 * Search for the aggregator that is related to this port, remove the 2226 * aggregator and assign another aggregator for other port related to it 2227 * (if any), and remove the port. 2228 */ 2229void bond_3ad_unbind_slave(struct slave *slave) 2230{ 2231 struct port *port, *prev_port, *temp_port; 2232 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2233 int select_new_active_agg = 0; 2234 struct bonding *bond = slave->bond; 2235 struct slave *slave_iter; 2236 struct list_head *iter; 2237 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2238 2239 /* Sync against bond_3ad_state_machine_handler() */ 2240 spin_lock_bh(&bond->mode_lock); 2241 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2242 port = &(SLAVE_AD_INFO(slave)->port); 2243 2244 /* if slave is null, the whole port is not initialized */ 2245 if (!port->slave) { 2246 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n"); 2247 goto out; 2248 } 2249 2250 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n", 2251 aggregator->aggregator_identifier); 2252 2253 /* Tell the partner that this port is not suitable for aggregation */ 2254 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 2255 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 2256 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 2257 port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION; 2258 __update_lacpdu_from_port(port); 2259 ad_lacpdu_send(port); 2260 2261 /* check if this aggregator is occupied */ 2262 if (aggregator->lag_ports) { 2263 /* check if there are other ports related to this aggregator 2264 * except the port related to this slave(thats ensure us that 2265 * there is a reason to search for new aggregator, and that we 2266 * will find one 2267 */ 2268 if ((aggregator->lag_ports != port) || 2269 (aggregator->lag_ports->next_port_in_aggregator)) { 2270 /* find new aggregator for the related port(s) */ 2271 bond_for_each_slave(bond, slave_iter, iter) { 2272 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2273 /* if the new aggregator is empty, or it is 2274 * connected to our port only 2275 */ 2276 if (!new_aggregator->lag_ports || 2277 ((new_aggregator->lag_ports == port) && 2278 !new_aggregator->lag_ports->next_port_in_aggregator)) 2279 break; 2280 } 2281 if (!slave_iter) 2282 new_aggregator = NULL; 2283 2284 /* if new aggregator found, copy the aggregator's 2285 * parameters and connect the related lag_ports to the 2286 * new aggregator 2287 */ 2288 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2289 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2290 aggregator->aggregator_identifier, 2291 new_aggregator->aggregator_identifier); 2292 2293 if ((new_aggregator->lag_ports == port) && 2294 new_aggregator->is_active) { 2295 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2296 select_new_active_agg = 1; 2297 } 2298 2299 new_aggregator->is_individual = aggregator->is_individual; 2300 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2301 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2302 new_aggregator->partner_system = aggregator->partner_system; 2303 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2304 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2305 new_aggregator->receive_state = aggregator->receive_state; 2306 new_aggregator->transmit_state = aggregator->transmit_state; 2307 new_aggregator->lag_ports = aggregator->lag_ports; 2308 new_aggregator->is_active = aggregator->is_active; 2309 new_aggregator->num_of_ports = aggregator->num_of_ports; 2310 2311 /* update the information that is written on 2312 * the ports about the aggregator 2313 */ 2314 for (temp_port = aggregator->lag_ports; temp_port; 2315 temp_port = temp_port->next_port_in_aggregator) { 2316 temp_port->aggregator = new_aggregator; 2317 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2318 } 2319 2320 ad_clear_agg(aggregator); 2321 2322 if (select_new_active_agg) 2323 ad_agg_selection_logic(__get_first_agg(port), 2324 &dummy_slave_update); 2325 } else { 2326 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2327 } 2328 } else { 2329 /* in case that the only port related to this 2330 * aggregator is the one we want to remove 2331 */ 2332 select_new_active_agg = aggregator->is_active; 2333 ad_clear_agg(aggregator); 2334 if (select_new_active_agg) { 2335 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2336 /* select new active aggregator */ 2337 temp_aggregator = __get_first_agg(port); 2338 if (temp_aggregator) 2339 ad_agg_selection_logic(temp_aggregator, 2340 &dummy_slave_update); 2341 } 2342 } 2343 } 2344 2345 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number); 2346 2347 /* find the aggregator that this port is connected to */ 2348 bond_for_each_slave(bond, slave_iter, iter) { 2349 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2350 prev_port = NULL; 2351 /* search the port in the aggregator's related ports */ 2352 for (temp_port = temp_aggregator->lag_ports; temp_port; 2353 prev_port = temp_port, 2354 temp_port = temp_port->next_port_in_aggregator) { 2355 if (temp_port == port) { 2356 /* the aggregator found - detach the port from 2357 * this aggregator 2358 */ 2359 if (prev_port) 2360 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2361 else 2362 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2363 temp_aggregator->num_of_ports--; 2364 if (__agg_active_ports(temp_aggregator) == 0) { 2365 select_new_active_agg = temp_aggregator->is_active; 2366 if (temp_aggregator->num_of_ports == 0) 2367 ad_clear_agg(temp_aggregator); 2368 if (select_new_active_agg) { 2369 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2370 /* select new active aggregator */ 2371 ad_agg_selection_logic(__get_first_agg(port), 2372 &dummy_slave_update); 2373 } 2374 } 2375 break; 2376 } 2377 } 2378 } 2379 port->slave = NULL; 2380 2381out: 2382 spin_unlock_bh(&bond->mode_lock); 2383} 2384 2385/** 2386 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2387 * @bond: bonding struct to work on 2388 * 2389 * If an ad_actor setting gets changed we need to update the individual port 2390 * settings so the bond device will use the new values when it gets upped. 2391 */ 2392void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2393{ 2394 struct list_head *iter; 2395 struct slave *slave; 2396 2397 ASSERT_RTNL(); 2398 2399 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2400 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2401 BOND_AD_INFO(bond).system.sys_mac_addr = 2402 *((struct mac_addr *)bond->dev->dev_addr); 2403 else 2404 BOND_AD_INFO(bond).system.sys_mac_addr = 2405 *((struct mac_addr *)bond->params.ad_actor_system); 2406 2407 spin_lock_bh(&bond->mode_lock); 2408 bond_for_each_slave(bond, slave, iter) { 2409 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2410 2411 __ad_actor_update_port(port); 2412 port->ntt = true; 2413 } 2414 spin_unlock_bh(&bond->mode_lock); 2415} 2416 2417/** 2418 * bond_agg_timer_advance - advance agg_select_timer 2419 * @bond: bonding structure 2420 * 2421 * Return true when agg_select_timer reaches 0. 2422 */ 2423static bool bond_agg_timer_advance(struct bonding *bond) 2424{ 2425 int val, nval; 2426 2427 while (1) { 2428 val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer); 2429 if (!val) 2430 return false; 2431 nval = val - 1; 2432 if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer, 2433 val, nval) == val) 2434 break; 2435 } 2436 return nval == 0; 2437} 2438 2439/** 2440 * bond_3ad_state_machine_handler - handle state machines timeout 2441 * @work: work context to fetch bonding struct to work on from 2442 * 2443 * The state machine handling concept in this module is to check every tick 2444 * which state machine should operate any function. The execution order is 2445 * round robin, so when we have an interaction between state machines, the 2446 * reply of one to each other might be delayed until next tick. 2447 * 2448 * This function also complete the initialization when the agg_select_timer 2449 * times out, and it selects an aggregator for the ports that are yet not 2450 * related to any aggregator, and selects the active aggregator for a bond. 2451 */ 2452void bond_3ad_state_machine_handler(struct work_struct *work) 2453{ 2454 struct bonding *bond = container_of(work, struct bonding, 2455 ad_work.work); 2456 struct aggregator *aggregator; 2457 struct list_head *iter; 2458 struct slave *slave; 2459 struct port *port; 2460 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2461 bool update_slave_arr = false; 2462 2463 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2464 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2465 * concurrently due to incoming LACPDU as well. 2466 */ 2467 spin_lock_bh(&bond->mode_lock); 2468 rcu_read_lock(); 2469 2470 /* check if there are any slaves */ 2471 if (!bond_has_slaves(bond)) 2472 goto re_arm; 2473 2474 if (bond_agg_timer_advance(bond)) { 2475 slave = bond_first_slave_rcu(bond); 2476 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2477 2478 /* select the active aggregator for the bond */ 2479 if (port) { 2480 if (!port->slave) { 2481 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2482 bond->dev->name); 2483 goto re_arm; 2484 } 2485 2486 aggregator = __get_first_agg(port); 2487 ad_agg_selection_logic(aggregator, &update_slave_arr); 2488 } 2489 bond_3ad_set_carrier(bond); 2490 } 2491 2492 /* for each port run the state machines */ 2493 bond_for_each_slave_rcu(bond, slave, iter) { 2494 port = &(SLAVE_AD_INFO(slave)->port); 2495 if (!port->slave) { 2496 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2497 bond->dev->name); 2498 goto re_arm; 2499 } 2500 2501 ad_rx_machine(NULL, port); 2502 ad_periodic_machine(port, &bond->params); 2503 ad_port_selection_logic(port, &update_slave_arr); 2504 ad_mux_machine(port, &update_slave_arr); 2505 ad_tx_machine(port); 2506 ad_churn_machine(port); 2507 2508 /* turn off the BEGIN bit, since we already handled it */ 2509 if (port->sm_vars & AD_PORT_BEGIN) 2510 port->sm_vars &= ~AD_PORT_BEGIN; 2511 } 2512 2513re_arm: 2514 bond_for_each_slave_rcu(bond, slave, iter) { 2515 if (slave->should_notify) { 2516 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2517 break; 2518 } 2519 } 2520 rcu_read_unlock(); 2521 spin_unlock_bh(&bond->mode_lock); 2522 2523 if (update_slave_arr) 2524 bond_slave_arr_work_rearm(bond, 0); 2525 2526 if (should_notify_rtnl && rtnl_trylock()) { 2527 bond_slave_state_notify(bond); 2528 rtnl_unlock(); 2529 } 2530 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2531} 2532 2533/** 2534 * bond_3ad_rx_indication - handle a received frame 2535 * @lacpdu: received lacpdu 2536 * @slave: slave struct to work on 2537 * 2538 * It is assumed that frames that were sent on this NIC don't returned as new 2539 * received frames (loopback). Since only the payload is given to this 2540 * function, it check for loopback. 2541 */ 2542static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave) 2543{ 2544 struct bonding *bond = slave->bond; 2545 int ret = RX_HANDLER_ANOTHER; 2546 struct bond_marker *marker; 2547 struct port *port; 2548 atomic64_t *stat; 2549 2550 port = &(SLAVE_AD_INFO(slave)->port); 2551 if (!port->slave) { 2552 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2553 slave->dev->name, slave->bond->dev->name); 2554 return ret; 2555 } 2556 2557 switch (lacpdu->subtype) { 2558 case AD_TYPE_LACPDU: 2559 ret = RX_HANDLER_CONSUMED; 2560 slave_dbg(slave->bond->dev, slave->dev, 2561 "Received LACPDU on port %d\n", 2562 port->actor_port_number); 2563 /* Protect against concurrent state machines */ 2564 spin_lock(&slave->bond->mode_lock); 2565 ad_rx_machine(lacpdu, port); 2566 spin_unlock(&slave->bond->mode_lock); 2567 break; 2568 case AD_TYPE_MARKER: 2569 ret = RX_HANDLER_CONSUMED; 2570 /* No need to convert fields to Little Endian since we 2571 * don't use the marker's fields. 2572 */ 2573 marker = (struct bond_marker *)lacpdu; 2574 switch (marker->tlv_type) { 2575 case AD_MARKER_INFORMATION_SUBTYPE: 2576 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n", 2577 port->actor_port_number); 2578 ad_marker_info_received(marker, port); 2579 break; 2580 case AD_MARKER_RESPONSE_SUBTYPE: 2581 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n", 2582 port->actor_port_number); 2583 ad_marker_response_received(marker, port); 2584 break; 2585 default: 2586 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n", 2587 port->actor_port_number); 2588 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx; 2589 atomic64_inc(stat); 2590 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx; 2591 atomic64_inc(stat); 2592 } 2593 break; 2594 default: 2595 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx); 2596 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx); 2597 } 2598 2599 return ret; 2600} 2601 2602/** 2603 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2604 * its current speed and duplex settings. 2605 * 2606 * @port: the port we'are looking at 2607 * @reset: Boolean to just reset the speed and the duplex part of the key 2608 * 2609 * The logic to change the oper / admin keys is: 2610 * (a) A full duplex port can participate in LACP with partner. 2611 * (b) When the speed is changed, LACP need to be reinitiated. 2612 */ 2613static void ad_update_actor_keys(struct port *port, bool reset) 2614{ 2615 u8 duplex = 0; 2616 u16 ospeed = 0, speed = 0; 2617 u16 old_oper_key = port->actor_oper_port_key; 2618 2619 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2620 if (!reset) { 2621 speed = __get_link_speed(port); 2622 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2623 duplex = __get_duplex(port); 2624 port->actor_admin_port_key |= (speed << 1) | duplex; 2625 } 2626 port->actor_oper_port_key = port->actor_admin_port_key; 2627 2628 if (old_oper_key != port->actor_oper_port_key) { 2629 /* Only 'duplex' port participates in LACP */ 2630 if (duplex) 2631 port->sm_vars |= AD_PORT_LACP_ENABLED; 2632 else 2633 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2634 2635 if (!reset) { 2636 if (!speed) { 2637 slave_err(port->slave->bond->dev, 2638 port->slave->dev, 2639 "speed changed to 0 on port %d\n", 2640 port->actor_port_number); 2641 } else if (duplex && ospeed != speed) { 2642 /* Speed change restarts LACP state-machine */ 2643 port->sm_vars |= AD_PORT_BEGIN; 2644 } 2645 } 2646 } 2647} 2648 2649/** 2650 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2651 * change indication 2652 * 2653 * @slave: slave struct to work on 2654 * 2655 * Handle reselection of aggregator (if needed) for this port. 2656 */ 2657void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2658{ 2659 struct port *port; 2660 2661 port = &(SLAVE_AD_INFO(slave)->port); 2662 2663 /* if slave is null, the whole port is not initialized */ 2664 if (!port->slave) { 2665 slave_warn(slave->bond->dev, slave->dev, 2666 "speed/duplex changed for uninitialized port\n"); 2667 return; 2668 } 2669 2670 spin_lock_bh(&slave->bond->mode_lock); 2671 ad_update_actor_keys(port, false); 2672 spin_unlock_bh(&slave->bond->mode_lock); 2673 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n", 2674 port->actor_port_number); 2675} 2676 2677/** 2678 * bond_3ad_handle_link_change - handle a slave's link status change indication 2679 * @slave: slave struct to work on 2680 * @link: whether the link is now up or down 2681 * 2682 * Handle reselection of aggregator (if needed) for this port. 2683 */ 2684void bond_3ad_handle_link_change(struct slave *slave, char link) 2685{ 2686 struct aggregator *agg; 2687 struct port *port; 2688 bool dummy; 2689 2690 port = &(SLAVE_AD_INFO(slave)->port); 2691 2692 /* if slave is null, the whole port is not initialized */ 2693 if (!port->slave) { 2694 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n"); 2695 return; 2696 } 2697 2698 spin_lock_bh(&slave->bond->mode_lock); 2699 /* on link down we are zeroing duplex and speed since 2700 * some of the adaptors(ce1000.lan) report full duplex/speed 2701 * instead of N/A(duplex) / 0(speed). 2702 * 2703 * on link up we are forcing recheck on the duplex and speed since 2704 * some of he adaptors(ce1000.lan) report. 2705 */ 2706 if (link == BOND_LINK_UP) { 2707 port->is_enabled = true; 2708 ad_update_actor_keys(port, false); 2709 } else { 2710 /* link has failed */ 2711 port->is_enabled = false; 2712 ad_update_actor_keys(port, true); 2713 } 2714 agg = __get_first_agg(port); 2715 ad_agg_selection_logic(agg, &dummy); 2716 2717 spin_unlock_bh(&slave->bond->mode_lock); 2718 2719 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n", 2720 port->actor_port_number, 2721 link == BOND_LINK_UP ? "UP" : "DOWN"); 2722 2723 /* RTNL is held and mode_lock is released so it's safe 2724 * to update slave_array here. 2725 */ 2726 bond_update_slave_arr(slave->bond, NULL); 2727} 2728 2729/** 2730 * bond_3ad_set_carrier - set link state for bonding master 2731 * @bond: bonding structure 2732 * 2733 * if we have an active aggregator, we're up, if not, we're down. 2734 * Presumes that we cannot have an active aggregator if there are 2735 * no slaves with link up. 2736 * 2737 * This behavior complies with IEEE 802.3 section 43.3.9. 2738 * 2739 * Called by bond_set_carrier(). Return zero if carrier state does not 2740 * change, nonzero if it does. 2741 */ 2742int bond_3ad_set_carrier(struct bonding *bond) 2743{ 2744 struct aggregator *active; 2745 struct slave *first_slave; 2746 int ret = 1; 2747 2748 rcu_read_lock(); 2749 first_slave = bond_first_slave_rcu(bond); 2750 if (!first_slave) { 2751 ret = 0; 2752 goto out; 2753 } 2754 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2755 if (active) { 2756 /* are enough slaves available to consider link up? */ 2757 if (__agg_active_ports(active) < bond->params.min_links) { 2758 if (netif_carrier_ok(bond->dev)) { 2759 netif_carrier_off(bond->dev); 2760 goto out; 2761 } 2762 } else if (!netif_carrier_ok(bond->dev)) { 2763 netif_carrier_on(bond->dev); 2764 goto out; 2765 } 2766 } else if (netif_carrier_ok(bond->dev)) { 2767 netif_carrier_off(bond->dev); 2768 } 2769out: 2770 rcu_read_unlock(); 2771 return ret; 2772} 2773 2774/** 2775 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2776 * @bond: bonding struct to work on 2777 * @ad_info: ad_info struct to fill with the bond's info 2778 * 2779 * Returns: 0 on success 2780 * < 0 on error 2781 */ 2782int __bond_3ad_get_active_agg_info(struct bonding *bond, 2783 struct ad_info *ad_info) 2784{ 2785 struct aggregator *aggregator = NULL; 2786 struct list_head *iter; 2787 struct slave *slave; 2788 struct port *port; 2789 2790 bond_for_each_slave_rcu(bond, slave, iter) { 2791 port = &(SLAVE_AD_INFO(slave)->port); 2792 if (port->aggregator && port->aggregator->is_active) { 2793 aggregator = port->aggregator; 2794 break; 2795 } 2796 } 2797 2798 if (!aggregator) 2799 return -1; 2800 2801 ad_info->aggregator_id = aggregator->aggregator_identifier; 2802 ad_info->ports = __agg_active_ports(aggregator); 2803 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2804 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2805 ether_addr_copy(ad_info->partner_system, 2806 aggregator->partner_system.mac_addr_value); 2807 return 0; 2808} 2809 2810int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2811{ 2812 int ret; 2813 2814 rcu_read_lock(); 2815 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2816 rcu_read_unlock(); 2817 2818 return ret; 2819} 2820 2821int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2822 struct slave *slave) 2823{ 2824 struct lacpdu *lacpdu, _lacpdu; 2825 2826 if (skb->protocol != PKT_TYPE_LACPDU) 2827 return RX_HANDLER_ANOTHER; 2828 2829 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2830 return RX_HANDLER_ANOTHER; 2831 2832 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2833 if (!lacpdu) { 2834 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx); 2835 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx); 2836 return RX_HANDLER_ANOTHER; 2837 } 2838 2839 return bond_3ad_rx_indication(lacpdu, slave); 2840} 2841 2842/** 2843 * bond_3ad_update_lacp_rate - change the lacp rate 2844 * @bond: bonding struct 2845 * 2846 * When modify lacp_rate parameter via sysfs, 2847 * update actor_oper_port_state of each port. 2848 * 2849 * Hold bond->mode_lock, 2850 * so we can modify port->actor_oper_port_state, 2851 * no matter bond is up or down. 2852 */ 2853void bond_3ad_update_lacp_rate(struct bonding *bond) 2854{ 2855 struct port *port = NULL; 2856 struct list_head *iter; 2857 struct slave *slave; 2858 int lacp_fast; 2859 2860 lacp_fast = bond->params.lacp_fast; 2861 spin_lock_bh(&bond->mode_lock); 2862 bond_for_each_slave(bond, slave, iter) { 2863 port = &(SLAVE_AD_INFO(slave)->port); 2864 if (lacp_fast) 2865 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; 2866 else 2867 port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT; 2868 } 2869 spin_unlock_bh(&bond->mode_lock); 2870} 2871 2872size_t bond_3ad_stats_size(void) 2873{ 2874 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */ 2875 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */ 2876 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */ 2877 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */ 2878 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */ 2879 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */ 2880 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */ 2881 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */ 2882 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */ 2883} 2884 2885int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats) 2886{ 2887 u64 val; 2888 2889 val = atomic64_read(&stats->lacpdu_rx); 2890 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val, 2891 BOND_3AD_STAT_PAD)) 2892 return -EMSGSIZE; 2893 val = atomic64_read(&stats->lacpdu_tx); 2894 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val, 2895 BOND_3AD_STAT_PAD)) 2896 return -EMSGSIZE; 2897 val = atomic64_read(&stats->lacpdu_unknown_rx); 2898 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val, 2899 BOND_3AD_STAT_PAD)) 2900 return -EMSGSIZE; 2901 val = atomic64_read(&stats->lacpdu_illegal_rx); 2902 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val, 2903 BOND_3AD_STAT_PAD)) 2904 return -EMSGSIZE; 2905 2906 val = atomic64_read(&stats->marker_rx); 2907 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val, 2908 BOND_3AD_STAT_PAD)) 2909 return -EMSGSIZE; 2910 val = atomic64_read(&stats->marker_tx); 2911 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val, 2912 BOND_3AD_STAT_PAD)) 2913 return -EMSGSIZE; 2914 val = atomic64_read(&stats->marker_resp_rx); 2915 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val, 2916 BOND_3AD_STAT_PAD)) 2917 return -EMSGSIZE; 2918 val = atomic64_read(&stats->marker_resp_tx); 2919 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val, 2920 BOND_3AD_STAT_PAD)) 2921 return -EMSGSIZE; 2922 val = atomic64_read(&stats->marker_unknown_rx); 2923 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val, 2924 BOND_3AD_STAT_PAD)) 2925 return -EMSGSIZE; 2926 2927 return 0; 2928} 2929