1 /* 2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License as published by the Free 6 * Software Foundation; either version 2 of the License, or (at your option) 7 * any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 59 16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 * 18 * The full GNU General Public License is included in this distribution in the 19 * file called LICENSE. 20 * 21 */ 22 23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 24 25 #include <linux/skbuff.h> 26 #include <linux/if_ether.h> 27 #include <linux/netdevice.h> 28 #include <linux/spinlock.h> 29 #include <linux/ethtool.h> 30 #include <linux/etherdevice.h> 31 #include <linux/if_bonding.h> 32 #include <linux/pkt_sched.h> 33 #include <net/net_namespace.h> 34 #include "bonding.h" 35 #include "bond_3ad.h" 36 37 /* General definitions */ 38 #define AD_SHORT_TIMEOUT 1 39 #define AD_LONG_TIMEOUT 0 40 #define AD_STANDBY 0x2 41 #define AD_MAX_TX_IN_SECOND 3 42 #define AD_COLLECTOR_MAX_DELAY 0 43 44 /* Timer definitions (43.4.4 in the 802.3ad standard) */ 45 #define AD_FAST_PERIODIC_TIME 1 46 #define AD_SLOW_PERIODIC_TIME 30 47 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) 48 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) 49 #define AD_CHURN_DETECTION_TIME 60 50 #define AD_AGGREGATE_WAIT_TIME 2 51 52 /* Port state definitions (43.4.2.2 in the 802.3ad standard) */ 53 #define AD_STATE_LACP_ACTIVITY 0x1 54 #define AD_STATE_LACP_TIMEOUT 0x2 55 #define AD_STATE_AGGREGATION 0x4 56 #define AD_STATE_SYNCHRONIZATION 0x8 57 #define AD_STATE_COLLECTING 0x10 58 #define AD_STATE_DISTRIBUTING 0x20 59 #define AD_STATE_DEFAULTED 0x40 60 #define AD_STATE_EXPIRED 0x80 61 62 /* Port Variables definitions used by the State Machines (43.4.7 in the 63 * 802.3ad standard) 64 */ 65 #define AD_PORT_BEGIN 0x1 66 #define AD_PORT_LACP_ENABLED 0x2 67 #define AD_PORT_ACTOR_CHURN 0x4 68 #define AD_PORT_PARTNER_CHURN 0x8 69 #define AD_PORT_READY 0x10 70 #define AD_PORT_READY_N 0x20 71 #define AD_PORT_MATCHED 0x40 72 #define AD_PORT_STANDBY 0x80 73 #define AD_PORT_SELECTED 0x100 74 #define AD_PORT_MOVED 0x200 75 76 /* Port Key definitions 77 * key is determined according to the link speed, duplex and 78 * user key (which is yet not supported) 79 * -------------------------------------------------------------- 80 * Port key : | User key | Speed | Duplex | 81 * -------------------------------------------------------------- 82 * 16 6 1 0 83 */ 84 #define AD_DUPLEX_KEY_BITS 0x1 85 #define AD_SPEED_KEY_BITS 0x3E 86 #define AD_USER_KEY_BITS 0xFFC0 87 88 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 89 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 90 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 91 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 92 #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 93 94 /* compare MAC addresses */ 95 #define MAC_ADDRESS_EQUAL(A, B) \ 96 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 97 98 static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; 99 static u16 ad_ticks_per_sec; 100 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 101 102 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; 103 104 /* ================= main 802.3ad protocol functions ================== */ 105 static int ad_lacpdu_send(struct port *port); 106 static int ad_marker_send(struct port *port, struct bond_marker *marker); 107 static void ad_mux_machine(struct port *port); 108 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 109 static void ad_tx_machine(struct port *port); 110 static void ad_periodic_machine(struct port *port); 111 static void ad_port_selection_logic(struct port *port); 112 static void ad_agg_selection_logic(struct aggregator *aggregator); 113 static void ad_clear_agg(struct aggregator *aggregator); 114 static void ad_initialize_agg(struct aggregator *aggregator); 115 static void ad_initialize_port(struct port *port, int lacp_fast); 116 static void ad_enable_collecting_distributing(struct port *port); 117 static void ad_disable_collecting_distributing(struct port *port); 118 static void ad_marker_info_received(struct bond_marker *marker_info, 119 struct port *port); 120 static void ad_marker_response_received(struct bond_marker *marker, 121 struct port *port); 122 123 124 /* ================= api to bonding and kernel code ================== */ 125 126 /** 127 * __get_bond_by_port - get the port's bonding struct 128 * @port: the port we're looking at 129 * 130 * Return @port's bonding struct, or %NULL if it can't be found. 131 */ 132 static inline struct bonding *__get_bond_by_port(struct port *port) 133 { 134 if (port->slave == NULL) 135 return NULL; 136 137 return bond_get_bond_by_slave(port->slave); 138 } 139 140 /** 141 * __get_first_agg - get the first aggregator in the bond 142 * @bond: the bond we're looking at 143 * 144 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 145 * found. 146 * The caller must hold RCU or RTNL lock. 147 */ 148 static inline struct aggregator *__get_first_agg(struct port *port) 149 { 150 struct bonding *bond = __get_bond_by_port(port); 151 struct slave *first_slave; 152 struct aggregator *agg; 153 154 /* If there's no bond for this port, or bond has no slaves */ 155 if (bond == NULL) 156 return NULL; 157 158 rcu_read_lock(); 159 first_slave = bond_first_slave_rcu(bond); 160 agg = first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL; 161 rcu_read_unlock(); 162 163 return agg; 164 } 165 166 /** 167 * __agg_has_partner - see if we have a partner 168 * @agg: the agregator we're looking at 169 * 170 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 171 * address for the partner). Return 0 if not. 172 */ 173 static inline int __agg_has_partner(struct aggregator *agg) 174 { 175 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 176 } 177 178 /** 179 * __disable_port - disable the port's slave 180 * @port: the port we're looking at 181 */ 182 static inline void __disable_port(struct port *port) 183 { 184 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 185 } 186 187 /** 188 * __enable_port - enable the port's slave, if it's up 189 * @port: the port we're looking at 190 */ 191 static inline void __enable_port(struct port *port) 192 { 193 struct slave *slave = port->slave; 194 195 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) 196 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 197 } 198 199 /** 200 * __port_is_enabled - check if the port's slave is in active state 201 * @port: the port we're looking at 202 */ 203 static inline int __port_is_enabled(struct port *port) 204 { 205 return bond_is_active_slave(port->slave); 206 } 207 208 /** 209 * __get_agg_selection_mode - get the aggregator selection mode 210 * @port: the port we're looking at 211 * 212 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 213 */ 214 static inline u32 __get_agg_selection_mode(struct port *port) 215 { 216 struct bonding *bond = __get_bond_by_port(port); 217 218 if (bond == NULL) 219 return BOND_AD_STABLE; 220 221 return bond->params.ad_select; 222 } 223 224 /** 225 * __check_agg_selection_timer - check if the selection timer has expired 226 * @port: the port we're looking at 227 */ 228 static inline int __check_agg_selection_timer(struct port *port) 229 { 230 struct bonding *bond = __get_bond_by_port(port); 231 232 if (bond == NULL) 233 return 0; 234 235 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 236 } 237 238 /** 239 * __get_state_machine_lock - lock the port's state machines 240 * @port: the port we're looking at 241 */ 242 static inline void __get_state_machine_lock(struct port *port) 243 { 244 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); 245 } 246 247 /** 248 * __release_state_machine_lock - unlock the port's state machines 249 * @port: the port we're looking at 250 */ 251 static inline void __release_state_machine_lock(struct port *port) 252 { 253 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); 254 } 255 256 /** 257 * __get_link_speed - get a port's speed 258 * @port: the port we're looking at 259 * 260 * Return @port's speed in 802.3ad bitmask format. i.e. one of: 261 * 0, 262 * %AD_LINK_SPEED_BITMASK_10MBPS, 263 * %AD_LINK_SPEED_BITMASK_100MBPS, 264 * %AD_LINK_SPEED_BITMASK_1000MBPS, 265 * %AD_LINK_SPEED_BITMASK_10000MBPS 266 */ 267 static u16 __get_link_speed(struct port *port) 268 { 269 struct slave *slave = port->slave; 270 u16 speed; 271 272 /* this if covers only a special case: when the configuration starts 273 * with link down, it sets the speed to 0. 274 * This is done in spite of the fact that the e100 driver reports 0 275 * to be compatible with MVT in the future. 276 */ 277 if (slave->link != BOND_LINK_UP) 278 speed = 0; 279 else { 280 switch (slave->speed) { 281 case SPEED_10: 282 speed = AD_LINK_SPEED_BITMASK_10MBPS; 283 break; 284 285 case SPEED_100: 286 speed = AD_LINK_SPEED_BITMASK_100MBPS; 287 break; 288 289 case SPEED_1000: 290 speed = AD_LINK_SPEED_BITMASK_1000MBPS; 291 break; 292 293 case SPEED_10000: 294 speed = AD_LINK_SPEED_BITMASK_10000MBPS; 295 break; 296 297 default: 298 /* unknown speed value from ethtool. shouldn't happen */ 299 speed = 0; 300 break; 301 } 302 } 303 304 pr_debug("Port %d Received link speed %d update from adapter\n", 305 port->actor_port_number, speed); 306 return speed; 307 } 308 309 /** 310 * __get_duplex - get a port's duplex 311 * @port: the port we're looking at 312 * 313 * Return @port's duplex in 802.3ad bitmask format. i.e.: 314 * 0x01 if in full duplex 315 * 0x00 otherwise 316 */ 317 static u8 __get_duplex(struct port *port) 318 { 319 struct slave *slave = port->slave; 320 321 u8 retval; 322 323 /* handling a special case: when the configuration starts with 324 * link down, it sets the duplex to 0. 325 */ 326 if (slave->link != BOND_LINK_UP) 327 retval = 0x0; 328 else { 329 switch (slave->duplex) { 330 case DUPLEX_FULL: 331 retval = 0x1; 332 pr_debug("Port %d Received status full duplex update from adapter\n", 333 port->actor_port_number); 334 break; 335 case DUPLEX_HALF: 336 default: 337 retval = 0x0; 338 pr_debug("Port %d Received status NOT full duplex update from adapter\n", 339 port->actor_port_number); 340 break; 341 } 342 } 343 return retval; 344 } 345 346 /** 347 * __initialize_port_locks - initialize a port's STATE machine spinlock 348 * @port: the slave of the port we're looking at 349 */ 350 static inline void __initialize_port_locks(struct slave *slave) 351 { 352 /* make sure it isn't called twice */ 353 spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock)); 354 } 355 356 /* Conversions */ 357 358 /** 359 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 360 * @timer_type: which timer to operate 361 * @par: timer parameter. see below 362 * 363 * If @timer_type is %current_while_timer, @par indicates long/short timer. 364 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 365 * %SLOW_PERIODIC_TIME. 366 */ 367 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 368 { 369 u16 retval = 0; /* to silence the compiler */ 370 371 switch (timer_type) { 372 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 373 if (par) 374 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 375 else 376 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 377 break; 378 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 379 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 380 break; 381 case AD_PERIODIC_TIMER: /* for periodic machine */ 382 retval = (par*ad_ticks_per_sec); /* long timeout */ 383 break; 384 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 385 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 386 break; 387 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 388 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 389 break; 390 } 391 392 return retval; 393 } 394 395 396 /* ================= ad_rx_machine helper functions ================== */ 397 398 /** 399 * __choose_matched - update a port's matched variable from a received lacpdu 400 * @lacpdu: the lacpdu we've received 401 * @port: the port we're looking at 402 * 403 * Update the value of the matched variable, using parameter values from a 404 * newly received lacpdu. Parameter values for the partner carried in the 405 * received PDU are compared with the corresponding operational parameter 406 * values for the actor. Matched is set to TRUE if all of these parameters 407 * match and the PDU parameter partner_state.aggregation has the same value as 408 * actor_oper_port_state.aggregation and lacp will actively maintain the link 409 * in the aggregation. Matched is also set to TRUE if the value of 410 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 411 * an individual link and lacp will actively maintain the link. Otherwise, 412 * matched is set to FALSE. LACP is considered to be actively maintaining the 413 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 414 * the actor's actor_oper_port_state.lacp_activity and the PDU's 415 * partner_state.lacp_activity variables are TRUE. 416 * 417 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 418 * used here to implement the language from 802.3ad 43.4.9 that requires 419 * recordPDU to "match" the LACPDU parameters to the stored values. 420 */ 421 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 422 { 423 /* check if all parameters are alike 424 * or this is individual link(aggregation == FALSE) 425 * then update the state machine Matched variable. 426 */ 427 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 428 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 429 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 430 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 431 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 432 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 433 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 434 ) { 435 port->sm_vars |= AD_PORT_MATCHED; 436 } else { 437 port->sm_vars &= ~AD_PORT_MATCHED; 438 } 439 } 440 441 /** 442 * __record_pdu - record parameters from a received lacpdu 443 * @lacpdu: the lacpdu we've received 444 * @port: the port we're looking at 445 * 446 * Record the parameter values for the Actor carried in a received lacpdu as 447 * the current partner operational parameter values and sets 448 * actor_oper_port_state.defaulted to FALSE. 449 */ 450 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 451 { 452 if (lacpdu && port) { 453 struct port_params *partner = &port->partner_oper; 454 455 __choose_matched(lacpdu, port); 456 /* record the new parameter values for the partner 457 * operational 458 */ 459 partner->port_number = ntohs(lacpdu->actor_port); 460 partner->port_priority = ntohs(lacpdu->actor_port_priority); 461 partner->system = lacpdu->actor_system; 462 partner->system_priority = ntohs(lacpdu->actor_system_priority); 463 partner->key = ntohs(lacpdu->actor_key); 464 partner->port_state = lacpdu->actor_state; 465 466 /* set actor_oper_port_state.defaulted to FALSE */ 467 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 468 469 /* set the partner sync. to on if the partner is sync, 470 * and the port is matched 471 */ 472 if ((port->sm_vars & AD_PORT_MATCHED) 473 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) 474 partner->port_state |= AD_STATE_SYNCHRONIZATION; 475 else 476 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 477 } 478 } 479 480 /** 481 * __record_default - record default parameters 482 * @port: the port we're looking at 483 * 484 * This function records the default parameter values for the partner carried 485 * in the Partner Admin parameters as the current partner operational parameter 486 * values and sets actor_oper_port_state.defaulted to TRUE. 487 */ 488 static void __record_default(struct port *port) 489 { 490 if (port) { 491 /* record the partner admin parameters */ 492 memcpy(&port->partner_oper, &port->partner_admin, 493 sizeof(struct port_params)); 494 495 /* set actor_oper_port_state.defaulted to true */ 496 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 497 } 498 } 499 500 /** 501 * __update_selected - update a port's Selected variable from a received lacpdu 502 * @lacpdu: the lacpdu we've received 503 * @port: the port we're looking at 504 * 505 * Update the value of the selected variable, using parameter values from a 506 * newly received lacpdu. The parameter values for the Actor carried in the 507 * received PDU are compared with the corresponding operational parameter 508 * values for the ports partner. If one or more of the comparisons shows that 509 * the value(s) received in the PDU differ from the current operational values, 510 * then selected is set to FALSE and actor_oper_port_state.synchronization is 511 * set to out_of_sync. Otherwise, selected remains unchanged. 512 */ 513 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 514 { 515 if (lacpdu && port) { 516 const struct port_params *partner = &port->partner_oper; 517 518 /* check if any parameter is different then 519 * update the state machine selected variable. 520 */ 521 if (ntohs(lacpdu->actor_port) != partner->port_number || 522 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 523 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 524 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 525 ntohs(lacpdu->actor_key) != partner->key || 526 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 527 port->sm_vars &= ~AD_PORT_SELECTED; 528 } 529 } 530 } 531 532 /** 533 * __update_default_selected - update a port's Selected variable from Partner 534 * @port: the port we're looking at 535 * 536 * This function updates the value of the selected variable, using the partner 537 * administrative parameter values. The administrative values are compared with 538 * the corresponding operational parameter values for the partner. If one or 539 * more of the comparisons shows that the administrative value(s) differ from 540 * the current operational values, then Selected is set to FALSE and 541 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 542 * Selected remains unchanged. 543 */ 544 static void __update_default_selected(struct port *port) 545 { 546 if (port) { 547 const struct port_params *admin = &port->partner_admin; 548 const struct port_params *oper = &port->partner_oper; 549 550 /* check if any parameter is different then 551 * update the state machine selected variable. 552 */ 553 if (admin->port_number != oper->port_number || 554 admin->port_priority != oper->port_priority || 555 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 556 admin->system_priority != oper->system_priority || 557 admin->key != oper->key || 558 (admin->port_state & AD_STATE_AGGREGATION) 559 != (oper->port_state & AD_STATE_AGGREGATION)) { 560 port->sm_vars &= ~AD_PORT_SELECTED; 561 } 562 } 563 } 564 565 /** 566 * __update_ntt - update a port's ntt variable from a received lacpdu 567 * @lacpdu: the lacpdu we've received 568 * @port: the port we're looking at 569 * 570 * Updates the value of the ntt variable, using parameter values from a newly 571 * received lacpdu. The parameter values for the partner carried in the 572 * received PDU are compared with the corresponding operational parameter 573 * values for the Actor. If one or more of the comparisons shows that the 574 * value(s) received in the PDU differ from the current operational values, 575 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 576 */ 577 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 578 { 579 /* validate lacpdu and port */ 580 if (lacpdu && port) { 581 /* check if any parameter is different then 582 * update the port->ntt. 583 */ 584 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 585 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 586 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 587 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 588 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 589 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 590 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 591 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 592 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 593 ) { 594 port->ntt = true; 595 } 596 } 597 } 598 599 /** 600 * __agg_ports_are_ready - check if all ports in an aggregator are ready 601 * @aggregator: the aggregator we're looking at 602 * 603 */ 604 static int __agg_ports_are_ready(struct aggregator *aggregator) 605 { 606 struct port *port; 607 int retval = 1; 608 609 if (aggregator) { 610 /* scan all ports in this aggregator to verfy if they are 611 * all ready. 612 */ 613 for (port = aggregator->lag_ports; 614 port; 615 port = port->next_port_in_aggregator) { 616 if (!(port->sm_vars & AD_PORT_READY_N)) { 617 retval = 0; 618 break; 619 } 620 } 621 } 622 623 return retval; 624 } 625 626 /** 627 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 628 * @aggregator: the aggregator we're looking at 629 * @val: Should the ports' ready bit be set on or off 630 * 631 */ 632 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 633 { 634 struct port *port; 635 636 for (port = aggregator->lag_ports; port; 637 port = port->next_port_in_aggregator) { 638 if (val) 639 port->sm_vars |= AD_PORT_READY; 640 else 641 port->sm_vars &= ~AD_PORT_READY; 642 } 643 } 644 645 /** 646 * __get_agg_bandwidth - get the total bandwidth of an aggregator 647 * @aggregator: the aggregator we're looking at 648 * 649 */ 650 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 651 { 652 u32 bandwidth = 0; 653 654 if (aggregator->num_of_ports) { 655 switch (__get_link_speed(aggregator->lag_ports)) { 656 case AD_LINK_SPEED_BITMASK_1MBPS: 657 bandwidth = aggregator->num_of_ports; 658 break; 659 case AD_LINK_SPEED_BITMASK_10MBPS: 660 bandwidth = aggregator->num_of_ports * 10; 661 break; 662 case AD_LINK_SPEED_BITMASK_100MBPS: 663 bandwidth = aggregator->num_of_ports * 100; 664 break; 665 case AD_LINK_SPEED_BITMASK_1000MBPS: 666 bandwidth = aggregator->num_of_ports * 1000; 667 break; 668 case AD_LINK_SPEED_BITMASK_10000MBPS: 669 bandwidth = aggregator->num_of_ports * 10000; 670 break; 671 default: 672 bandwidth = 0; /* to silence the compiler */ 673 } 674 } 675 return bandwidth; 676 } 677 678 /** 679 * __get_active_agg - get the current active aggregator 680 * @aggregator: the aggregator we're looking at 681 * 682 * Caller must hold RCU lock. 683 */ 684 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 685 { 686 struct bonding *bond = aggregator->slave->bond; 687 struct list_head *iter; 688 struct slave *slave; 689 690 bond_for_each_slave_rcu(bond, slave, iter) 691 if (SLAVE_AD_INFO(slave).aggregator.is_active) 692 return &(SLAVE_AD_INFO(slave).aggregator); 693 694 return NULL; 695 } 696 697 /** 698 * __update_lacpdu_from_port - update a port's lacpdu fields 699 * @port: the port we're looking at 700 */ 701 static inline void __update_lacpdu_from_port(struct port *port) 702 { 703 struct lacpdu *lacpdu = &port->lacpdu; 704 const struct port_params *partner = &port->partner_oper; 705 706 /* update current actual Actor parameters 707 * lacpdu->subtype initialized 708 * lacpdu->version_number initialized 709 * lacpdu->tlv_type_actor_info initialized 710 * lacpdu->actor_information_length initialized 711 */ 712 713 lacpdu->actor_system_priority = htons(port->actor_system_priority); 714 lacpdu->actor_system = port->actor_system; 715 lacpdu->actor_key = htons(port->actor_oper_port_key); 716 lacpdu->actor_port_priority = htons(port->actor_port_priority); 717 lacpdu->actor_port = htons(port->actor_port_number); 718 lacpdu->actor_state = port->actor_oper_port_state; 719 720 /* lacpdu->reserved_3_1 initialized 721 * lacpdu->tlv_type_partner_info initialized 722 * lacpdu->partner_information_length initialized 723 */ 724 725 lacpdu->partner_system_priority = htons(partner->system_priority); 726 lacpdu->partner_system = partner->system; 727 lacpdu->partner_key = htons(partner->key); 728 lacpdu->partner_port_priority = htons(partner->port_priority); 729 lacpdu->partner_port = htons(partner->port_number); 730 lacpdu->partner_state = partner->port_state; 731 732 /* lacpdu->reserved_3_2 initialized 733 * lacpdu->tlv_type_collector_info initialized 734 * lacpdu->collector_information_length initialized 735 * collector_max_delay initialized 736 * reserved_12[12] initialized 737 * tlv_type_terminator initialized 738 * terminator_length initialized 739 * reserved_50[50] initialized 740 */ 741 } 742 743 /* ================= main 802.3ad protocol code ========================= */ 744 745 /** 746 * ad_lacpdu_send - send out a lacpdu packet on a given port 747 * @port: the port we're looking at 748 * 749 * Returns: 0 on success 750 * < 0 on error 751 */ 752 static int ad_lacpdu_send(struct port *port) 753 { 754 struct slave *slave = port->slave; 755 struct sk_buff *skb; 756 struct lacpdu_header *lacpdu_header; 757 int length = sizeof(struct lacpdu_header); 758 759 skb = dev_alloc_skb(length); 760 if (!skb) 761 return -ENOMEM; 762 763 skb->dev = slave->dev; 764 skb_reset_mac_header(skb); 765 skb->network_header = skb->mac_header + ETH_HLEN; 766 skb->protocol = PKT_TYPE_LACPDU; 767 skb->priority = TC_PRIO_CONTROL; 768 769 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 770 771 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 772 /* Note: source address is set to be the member's PERMANENT address, 773 * because we use it to identify loopback lacpdus in receive. 774 */ 775 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 776 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 777 778 lacpdu_header->lacpdu = port->lacpdu; 779 780 dev_queue_xmit(skb); 781 782 return 0; 783 } 784 785 /** 786 * ad_marker_send - send marker information/response on a given port 787 * @port: the port we're looking at 788 * @marker: marker data to send 789 * 790 * Returns: 0 on success 791 * < 0 on error 792 */ 793 static int ad_marker_send(struct port *port, struct bond_marker *marker) 794 { 795 struct slave *slave = port->slave; 796 struct sk_buff *skb; 797 struct bond_marker_header *marker_header; 798 int length = sizeof(struct bond_marker_header); 799 800 skb = dev_alloc_skb(length + 16); 801 if (!skb) 802 return -ENOMEM; 803 804 skb_reserve(skb, 16); 805 806 skb->dev = slave->dev; 807 skb_reset_mac_header(skb); 808 skb->network_header = skb->mac_header + ETH_HLEN; 809 skb->protocol = PKT_TYPE_LACPDU; 810 811 marker_header = (struct bond_marker_header *)skb_put(skb, length); 812 813 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 814 /* Note: source address is set to be the member's PERMANENT address, 815 * because we use it to identify loopback MARKERs in receive. 816 */ 817 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 818 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 819 820 marker_header->marker = *marker; 821 822 dev_queue_xmit(skb); 823 824 return 0; 825 } 826 827 /** 828 * ad_mux_machine - handle a port's mux state machine 829 * @port: the port we're looking at 830 */ 831 static void ad_mux_machine(struct port *port) 832 { 833 mux_states_t last_state; 834 835 /* keep current State Machine state to compare later if it was 836 * changed 837 */ 838 last_state = port->sm_mux_state; 839 840 if (port->sm_vars & AD_PORT_BEGIN) { 841 port->sm_mux_state = AD_MUX_DETACHED; 842 } else { 843 switch (port->sm_mux_state) { 844 case AD_MUX_DETACHED: 845 if ((port->sm_vars & AD_PORT_SELECTED) 846 || (port->sm_vars & AD_PORT_STANDBY)) 847 /* if SELECTED or STANDBY */ 848 port->sm_mux_state = AD_MUX_WAITING; 849 break; 850 case AD_MUX_WAITING: 851 /* if SELECTED == FALSE return to DETACH state */ 852 if (!(port->sm_vars & AD_PORT_SELECTED)) { 853 port->sm_vars &= ~AD_PORT_READY_N; 854 /* in order to withhold the Selection Logic to 855 * check all ports READY_N value every callback 856 * cycle to update ready variable, we check 857 * READY_N and update READY here 858 */ 859 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 860 port->sm_mux_state = AD_MUX_DETACHED; 861 break; 862 } 863 864 /* check if the wait_while_timer expired */ 865 if (port->sm_mux_timer_counter 866 && !(--port->sm_mux_timer_counter)) 867 port->sm_vars |= AD_PORT_READY_N; 868 869 /* in order to withhold the selection logic to check 870 * all ports READY_N value every callback cycle to 871 * update ready variable, we check READY_N and update 872 * READY here 873 */ 874 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 875 876 /* if the wait_while_timer expired, and the port is 877 * in READY state, move to ATTACHED state 878 */ 879 if ((port->sm_vars & AD_PORT_READY) 880 && !port->sm_mux_timer_counter) 881 port->sm_mux_state = AD_MUX_ATTACHED; 882 break; 883 case AD_MUX_ATTACHED: 884 /* check also if agg_select_timer expired (so the 885 * edable port will take place only after this timer) 886 */ 887 if ((port->sm_vars & AD_PORT_SELECTED) && 888 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && 889 !__check_agg_selection_timer(port)) { 890 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING; 891 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 892 (port->sm_vars & AD_PORT_STANDBY)) { 893 /* if UNSELECTED or STANDBY */ 894 port->sm_vars &= ~AD_PORT_READY_N; 895 /* in order to withhold the selection logic to 896 * check all ports READY_N value every callback 897 * cycle to update ready variable, we check 898 * READY_N and update READY here 899 */ 900 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 901 port->sm_mux_state = AD_MUX_DETACHED; 902 } 903 break; 904 case AD_MUX_COLLECTING_DISTRIBUTING: 905 if (!(port->sm_vars & AD_PORT_SELECTED) || 906 (port->sm_vars & AD_PORT_STANDBY) || 907 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)) { 908 port->sm_mux_state = AD_MUX_ATTACHED; 909 } else { 910 /* if port state hasn't changed make 911 * sure that a collecting distributing 912 * port in an active aggregator is enabled 913 */ 914 if (port->aggregator && 915 port->aggregator->is_active && 916 !__port_is_enabled(port)) { 917 918 __enable_port(port); 919 } 920 } 921 break; 922 default: 923 break; 924 } 925 } 926 927 /* check if the state machine was changed */ 928 if (port->sm_mux_state != last_state) { 929 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", 930 port->actor_port_number, last_state, 931 port->sm_mux_state); 932 switch (port->sm_mux_state) { 933 case AD_MUX_DETACHED: 934 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 935 ad_disable_collecting_distributing(port); 936 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 937 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 938 port->ntt = true; 939 break; 940 case AD_MUX_WAITING: 941 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 942 break; 943 case AD_MUX_ATTACHED: 944 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 945 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 946 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 947 ad_disable_collecting_distributing(port); 948 port->ntt = true; 949 break; 950 case AD_MUX_COLLECTING_DISTRIBUTING: 951 port->actor_oper_port_state |= AD_STATE_COLLECTING; 952 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 953 ad_enable_collecting_distributing(port); 954 port->ntt = true; 955 break; 956 default: 957 break; 958 } 959 } 960 } 961 962 /** 963 * ad_rx_machine - handle a port's rx State Machine 964 * @lacpdu: the lacpdu we've received 965 * @port: the port we're looking at 966 * 967 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 968 * CURRENT. If timer expired set the state machine in the proper state. 969 * In other cases, this function checks if we need to switch to other state. 970 */ 971 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 972 { 973 rx_states_t last_state; 974 975 /* keep current State Machine state to compare later if it was 976 * changed 977 */ 978 last_state = port->sm_rx_state; 979 980 /* check if state machine should change state */ 981 982 /* first, check if port was reinitialized */ 983 if (port->sm_vars & AD_PORT_BEGIN) 984 port->sm_rx_state = AD_RX_INITIALIZE; 985 /* check if port is not enabled */ 986 else if (!(port->sm_vars & AD_PORT_BEGIN) 987 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) 988 port->sm_rx_state = AD_RX_PORT_DISABLED; 989 /* check if new lacpdu arrived */ 990 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 991 (port->sm_rx_state == AD_RX_DEFAULTED) || 992 (port->sm_rx_state == AD_RX_CURRENT))) { 993 port->sm_rx_timer_counter = 0; 994 port->sm_rx_state = AD_RX_CURRENT; 995 } else { 996 /* if timer is on, and if it is expired */ 997 if (port->sm_rx_timer_counter && 998 !(--port->sm_rx_timer_counter)) { 999 switch (port->sm_rx_state) { 1000 case AD_RX_EXPIRED: 1001 port->sm_rx_state = AD_RX_DEFAULTED; 1002 break; 1003 case AD_RX_CURRENT: 1004 port->sm_rx_state = AD_RX_EXPIRED; 1005 break; 1006 default: 1007 break; 1008 } 1009 } else { 1010 /* if no lacpdu arrived and no timer is on */ 1011 switch (port->sm_rx_state) { 1012 case AD_RX_PORT_DISABLED: 1013 if (port->sm_vars & AD_PORT_MOVED) 1014 port->sm_rx_state = AD_RX_INITIALIZE; 1015 else if (port->is_enabled 1016 && (port->sm_vars 1017 & AD_PORT_LACP_ENABLED)) 1018 port->sm_rx_state = AD_RX_EXPIRED; 1019 else if (port->is_enabled 1020 && ((port->sm_vars 1021 & AD_PORT_LACP_ENABLED) == 0)) 1022 port->sm_rx_state = AD_RX_LACP_DISABLED; 1023 break; 1024 default: 1025 break; 1026 1027 } 1028 } 1029 } 1030 1031 /* check if the State machine was changed or new lacpdu arrived */ 1032 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1033 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", 1034 port->actor_port_number, last_state, 1035 port->sm_rx_state); 1036 switch (port->sm_rx_state) { 1037 case AD_RX_INITIALIZE: 1038 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) 1039 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1040 else 1041 port->sm_vars |= AD_PORT_LACP_ENABLED; 1042 port->sm_vars &= ~AD_PORT_SELECTED; 1043 __record_default(port); 1044 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1045 port->sm_vars &= ~AD_PORT_MOVED; 1046 port->sm_rx_state = AD_RX_PORT_DISABLED; 1047 1048 /* Fall Through */ 1049 case AD_RX_PORT_DISABLED: 1050 port->sm_vars &= ~AD_PORT_MATCHED; 1051 break; 1052 case AD_RX_LACP_DISABLED: 1053 port->sm_vars &= ~AD_PORT_SELECTED; 1054 __record_default(port); 1055 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1056 port->sm_vars |= AD_PORT_MATCHED; 1057 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1058 break; 1059 case AD_RX_EXPIRED: 1060 /* Reset of the Synchronization flag (Standard 43.4.12) 1061 * This reset cause to disable this port in the 1062 * COLLECTING_DISTRIBUTING state of the mux machine in 1063 * case of EXPIRED even if LINK_DOWN didn't arrive for 1064 * the port. 1065 */ 1066 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1067 port->sm_vars &= ~AD_PORT_MATCHED; 1068 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; 1069 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1070 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1071 break; 1072 case AD_RX_DEFAULTED: 1073 __update_default_selected(port); 1074 __record_default(port); 1075 port->sm_vars |= AD_PORT_MATCHED; 1076 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1077 break; 1078 case AD_RX_CURRENT: 1079 /* detect loopback situation */ 1080 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1081 &(port->actor_system))) { 1082 pr_err("%s: An illegal loopback occurred on adapter (%s)\n" 1083 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1084 port->slave->bond->dev->name, 1085 port->slave->dev->name); 1086 return; 1087 } 1088 __update_selected(lacpdu, port); 1089 __update_ntt(lacpdu, port); 1090 __record_pdu(lacpdu, port); 1091 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1092 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1093 break; 1094 default: 1095 break; 1096 } 1097 } 1098 } 1099 1100 /** 1101 * ad_tx_machine - handle a port's tx state machine 1102 * @port: the port we're looking at 1103 */ 1104 static void ad_tx_machine(struct port *port) 1105 { 1106 /* check if tx timer expired, to verify that we do not send more than 1107 * 3 packets per second 1108 */ 1109 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1110 /* check if there is something to send */ 1111 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1112 __update_lacpdu_from_port(port); 1113 1114 if (ad_lacpdu_send(port) >= 0) { 1115 pr_debug("Sent LACPDU on port %d\n", 1116 port->actor_port_number); 1117 1118 /* mark ntt as false, so it will not be sent 1119 * again until demanded 1120 */ 1121 port->ntt = false; 1122 } 1123 } 1124 /* restart tx timer(to verify that we will not exceed 1125 * AD_MAX_TX_IN_SECOND 1126 */ 1127 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1128 } 1129 } 1130 1131 /** 1132 * ad_periodic_machine - handle a port's periodic state machine 1133 * @port: the port we're looking at 1134 * 1135 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1136 */ 1137 static void ad_periodic_machine(struct port *port) 1138 { 1139 periodic_states_t last_state; 1140 1141 /* keep current state machine state to compare later if it was changed */ 1142 last_state = port->sm_periodic_state; 1143 1144 /* check if port was reinitialized */ 1145 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1146 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1147 ) { 1148 port->sm_periodic_state = AD_NO_PERIODIC; 1149 } 1150 /* check if state machine should change state */ 1151 else if (port->sm_periodic_timer_counter) { 1152 /* check if periodic state machine expired */ 1153 if (!(--port->sm_periodic_timer_counter)) { 1154 /* if expired then do tx */ 1155 port->sm_periodic_state = AD_PERIODIC_TX; 1156 } else { 1157 /* If not expired, check if there is some new timeout 1158 * parameter from the partner state 1159 */ 1160 switch (port->sm_periodic_state) { 1161 case AD_FAST_PERIODIC: 1162 if (!(port->partner_oper.port_state 1163 & AD_STATE_LACP_TIMEOUT)) 1164 port->sm_periodic_state = AD_SLOW_PERIODIC; 1165 break; 1166 case AD_SLOW_PERIODIC: 1167 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1168 port->sm_periodic_timer_counter = 0; 1169 port->sm_periodic_state = AD_PERIODIC_TX; 1170 } 1171 break; 1172 default: 1173 break; 1174 } 1175 } 1176 } else { 1177 switch (port->sm_periodic_state) { 1178 case AD_NO_PERIODIC: 1179 port->sm_periodic_state = AD_FAST_PERIODIC; 1180 break; 1181 case AD_PERIODIC_TX: 1182 if (!(port->partner_oper.port_state & 1183 AD_STATE_LACP_TIMEOUT)) 1184 port->sm_periodic_state = AD_SLOW_PERIODIC; 1185 else 1186 port->sm_periodic_state = AD_FAST_PERIODIC; 1187 break; 1188 default: 1189 break; 1190 } 1191 } 1192 1193 /* check if the state machine was changed */ 1194 if (port->sm_periodic_state != last_state) { 1195 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1196 port->actor_port_number, last_state, 1197 port->sm_periodic_state); 1198 switch (port->sm_periodic_state) { 1199 case AD_NO_PERIODIC: 1200 port->sm_periodic_timer_counter = 0; 1201 break; 1202 case AD_FAST_PERIODIC: 1203 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1204 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1205 break; 1206 case AD_SLOW_PERIODIC: 1207 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1208 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1209 break; 1210 case AD_PERIODIC_TX: 1211 port->ntt = true; 1212 break; 1213 default: 1214 break; 1215 } 1216 } 1217 } 1218 1219 /** 1220 * ad_port_selection_logic - select aggregation groups 1221 * @port: the port we're looking at 1222 * 1223 * Select aggregation groups, and assign each port for it's aggregetor. The 1224 * selection logic is called in the inititalization (after all the handshkes), 1225 * and after every lacpdu receive (if selected is off). 1226 */ 1227 static void ad_port_selection_logic(struct port *port) 1228 { 1229 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1230 struct port *last_port = NULL, *curr_port; 1231 struct list_head *iter; 1232 struct bonding *bond; 1233 struct slave *slave; 1234 int found = 0; 1235 1236 /* if the port is already Selected, do nothing */ 1237 if (port->sm_vars & AD_PORT_SELECTED) 1238 return; 1239 1240 bond = __get_bond_by_port(port); 1241 1242 /* if the port is connected to other aggregator, detach it */ 1243 if (port->aggregator) { 1244 /* detach the port from its former aggregator */ 1245 temp_aggregator = port->aggregator; 1246 for (curr_port = temp_aggregator->lag_ports; curr_port; 1247 last_port = curr_port, 1248 curr_port = curr_port->next_port_in_aggregator) { 1249 if (curr_port == port) { 1250 temp_aggregator->num_of_ports--; 1251 /* if it is the first port attached to the 1252 * aggregator 1253 */ 1254 if (!last_port) { 1255 temp_aggregator->lag_ports = 1256 port->next_port_in_aggregator; 1257 } else { 1258 /* not the first port attached to the 1259 * aggregator 1260 */ 1261 last_port->next_port_in_aggregator = 1262 port->next_port_in_aggregator; 1263 } 1264 1265 /* clear the port's relations to this 1266 * aggregator 1267 */ 1268 port->aggregator = NULL; 1269 port->next_port_in_aggregator = NULL; 1270 port->actor_port_aggregator_identifier = 0; 1271 1272 pr_debug("Port %d left LAG %d\n", 1273 port->actor_port_number, 1274 temp_aggregator->aggregator_identifier); 1275 /* if the aggregator is empty, clear its 1276 * parameters, and set it ready to be attached 1277 */ 1278 if (!temp_aggregator->lag_ports) 1279 ad_clear_agg(temp_aggregator); 1280 break; 1281 } 1282 } 1283 if (!curr_port) { 1284 /* meaning: the port was related to an aggregator 1285 * but was not on the aggregator port list 1286 */ 1287 pr_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1288 port->slave->bond->dev->name, 1289 port->actor_port_number, 1290 port->slave->dev->name, 1291 port->aggregator->aggregator_identifier); 1292 } 1293 } 1294 /* search on all aggregators for a suitable aggregator for this port */ 1295 bond_for_each_slave(bond, slave, iter) { 1296 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1297 1298 /* keep a free aggregator for later use(if needed) */ 1299 if (!aggregator->lag_ports) { 1300 if (!free_aggregator) 1301 free_aggregator = aggregator; 1302 continue; 1303 } 1304 /* check if current aggregator suits us */ 1305 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1306 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1307 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1308 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1309 ) && 1310 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1311 !aggregator->is_individual) /* but is not individual OR */ 1312 ) 1313 ) { 1314 /* attach to the founded aggregator */ 1315 port->aggregator = aggregator; 1316 port->actor_port_aggregator_identifier = 1317 port->aggregator->aggregator_identifier; 1318 port->next_port_in_aggregator = aggregator->lag_ports; 1319 port->aggregator->num_of_ports++; 1320 aggregator->lag_ports = port; 1321 pr_debug("Port %d joined LAG %d(existing LAG)\n", 1322 port->actor_port_number, 1323 port->aggregator->aggregator_identifier); 1324 1325 /* mark this port as selected */ 1326 port->sm_vars |= AD_PORT_SELECTED; 1327 found = 1; 1328 break; 1329 } 1330 } 1331 1332 /* the port couldn't find an aggregator - attach it to a new 1333 * aggregator 1334 */ 1335 if (!found) { 1336 if (free_aggregator) { 1337 /* assign port a new aggregator */ 1338 port->aggregator = free_aggregator; 1339 port->actor_port_aggregator_identifier = 1340 port->aggregator->aggregator_identifier; 1341 1342 /* update the new aggregator's parameters 1343 * if port was responsed from the end-user 1344 */ 1345 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) 1346 /* if port is full duplex */ 1347 port->aggregator->is_individual = false; 1348 else 1349 port->aggregator->is_individual = true; 1350 1351 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; 1352 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; 1353 port->aggregator->partner_system = 1354 port->partner_oper.system; 1355 port->aggregator->partner_system_priority = 1356 port->partner_oper.system_priority; 1357 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1358 port->aggregator->receive_state = 1; 1359 port->aggregator->transmit_state = 1; 1360 port->aggregator->lag_ports = port; 1361 port->aggregator->num_of_ports++; 1362 1363 /* mark this port as selected */ 1364 port->sm_vars |= AD_PORT_SELECTED; 1365 1366 pr_debug("Port %d joined LAG %d(new LAG)\n", 1367 port->actor_port_number, 1368 port->aggregator->aggregator_identifier); 1369 } else { 1370 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n", 1371 port->slave->bond->dev->name, 1372 port->actor_port_number, port->slave->dev->name); 1373 } 1374 } 1375 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1376 * in all aggregator's ports, else set ready=FALSE in all 1377 * aggregator's ports 1378 */ 1379 __set_agg_ports_ready(port->aggregator, 1380 __agg_ports_are_ready(port->aggregator)); 1381 1382 aggregator = __get_first_agg(port); 1383 ad_agg_selection_logic(aggregator); 1384 } 1385 1386 /* Decide if "agg" is a better choice for the new active aggregator that 1387 * the current best, according to the ad_select policy. 1388 */ 1389 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1390 struct aggregator *curr) 1391 { 1392 /* 0. If no best, select current. 1393 * 1394 * 1. If the current agg is not individual, and the best is 1395 * individual, select current. 1396 * 1397 * 2. If current agg is individual and the best is not, keep best. 1398 * 1399 * 3. Therefore, current and best are both individual or both not 1400 * individual, so: 1401 * 1402 * 3a. If current agg partner replied, and best agg partner did not, 1403 * select current. 1404 * 1405 * 3b. If current agg partner did not reply and best agg partner 1406 * did reply, keep best. 1407 * 1408 * 4. Therefore, current and best both have partner replies or 1409 * both do not, so perform selection policy: 1410 * 1411 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1412 * select by bandwidth. 1413 * 1414 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1415 */ 1416 if (!best) 1417 return curr; 1418 1419 if (!curr->is_individual && best->is_individual) 1420 return curr; 1421 1422 if (curr->is_individual && !best->is_individual) 1423 return best; 1424 1425 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1426 return curr; 1427 1428 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1429 return best; 1430 1431 switch (__get_agg_selection_mode(curr->lag_ports)) { 1432 case BOND_AD_COUNT: 1433 if (curr->num_of_ports > best->num_of_ports) 1434 return curr; 1435 1436 if (curr->num_of_ports < best->num_of_ports) 1437 return best; 1438 1439 /*FALLTHROUGH*/ 1440 case BOND_AD_STABLE: 1441 case BOND_AD_BANDWIDTH: 1442 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1443 return curr; 1444 1445 break; 1446 1447 default: 1448 pr_warn_ratelimited("%s: Impossible agg select mode %d\n", 1449 curr->slave->bond->dev->name, 1450 __get_agg_selection_mode(curr->lag_ports)); 1451 break; 1452 } 1453 1454 return best; 1455 } 1456 1457 static int agg_device_up(const struct aggregator *agg) 1458 { 1459 struct port *port = agg->lag_ports; 1460 1461 if (!port) 1462 return 0; 1463 1464 return netif_running(port->slave->dev) && 1465 netif_carrier_ok(port->slave->dev); 1466 } 1467 1468 /** 1469 * ad_agg_selection_logic - select an aggregation group for a team 1470 * @aggregator: the aggregator we're looking at 1471 * 1472 * It is assumed that only one aggregator may be selected for a team. 1473 * 1474 * The logic of this function is to select the aggregator according to 1475 * the ad_select policy: 1476 * 1477 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1478 * it, and to reselect the active aggregator only if the previous 1479 * aggregator has no more ports related to it. 1480 * 1481 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1482 * bandwidth, and reselect whenever a link state change takes place or the 1483 * set of slaves in the bond changes. 1484 * 1485 * BOND_AD_COUNT: select the aggregator with largest number of ports 1486 * (slaves), and reselect whenever a link state change takes place or the 1487 * set of slaves in the bond changes. 1488 * 1489 * FIXME: this function MUST be called with the first agg in the bond, or 1490 * __get_active_agg() won't work correctly. This function should be better 1491 * called with the bond itself, and retrieve the first agg from it. 1492 */ 1493 static void ad_agg_selection_logic(struct aggregator *agg) 1494 { 1495 struct aggregator *best, *active, *origin; 1496 struct bonding *bond = agg->slave->bond; 1497 struct list_head *iter; 1498 struct slave *slave; 1499 struct port *port; 1500 1501 rcu_read_lock(); 1502 origin = agg; 1503 active = __get_active_agg(agg); 1504 best = (active && agg_device_up(active)) ? active : NULL; 1505 1506 bond_for_each_slave_rcu(bond, slave, iter) { 1507 agg = &(SLAVE_AD_INFO(slave).aggregator); 1508 1509 agg->is_active = 0; 1510 1511 if (agg->num_of_ports && agg_device_up(agg)) 1512 best = ad_agg_selection_test(best, agg); 1513 } 1514 1515 if (best && 1516 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1517 /* For the STABLE policy, don't replace the old active 1518 * aggregator if it's still active (it has an answering 1519 * partner) or if both the best and active don't have an 1520 * answering partner. 1521 */ 1522 if (active && active->lag_ports && 1523 active->lag_ports->is_enabled && 1524 (__agg_has_partner(active) || 1525 (!__agg_has_partner(active) && 1526 !__agg_has_partner(best)))) { 1527 if (!(!active->actor_oper_aggregator_key && 1528 best->actor_oper_aggregator_key)) { 1529 best = NULL; 1530 active->is_active = 1; 1531 } 1532 } 1533 } 1534 1535 if (best && (best == active)) { 1536 best = NULL; 1537 active->is_active = 1; 1538 } 1539 1540 /* if there is new best aggregator, activate it */ 1541 if (best) { 1542 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1543 best->aggregator_identifier, best->num_of_ports, 1544 best->actor_oper_aggregator_key, 1545 best->partner_oper_aggregator_key, 1546 best->is_individual, best->is_active); 1547 pr_debug("best ports %p slave %p %s\n", 1548 best->lag_ports, best->slave, 1549 best->slave ? best->slave->dev->name : "NULL"); 1550 1551 bond_for_each_slave_rcu(bond, slave, iter) { 1552 agg = &(SLAVE_AD_INFO(slave).aggregator); 1553 1554 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1555 agg->aggregator_identifier, agg->num_of_ports, 1556 agg->actor_oper_aggregator_key, 1557 agg->partner_oper_aggregator_key, 1558 agg->is_individual, agg->is_active); 1559 } 1560 1561 /* check if any partner replys */ 1562 if (best->is_individual) { 1563 pr_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1564 best->slave ? 1565 best->slave->bond->dev->name : "NULL"); 1566 } 1567 1568 best->is_active = 1; 1569 pr_debug("LAG %d chosen as the active LAG\n", 1570 best->aggregator_identifier); 1571 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1572 best->aggregator_identifier, best->num_of_ports, 1573 best->actor_oper_aggregator_key, 1574 best->partner_oper_aggregator_key, 1575 best->is_individual, best->is_active); 1576 1577 /* disable the ports that were related to the former 1578 * active_aggregator 1579 */ 1580 if (active) { 1581 for (port = active->lag_ports; port; 1582 port = port->next_port_in_aggregator) { 1583 __disable_port(port); 1584 } 1585 } 1586 } 1587 1588 /* if the selected aggregator is of join individuals 1589 * (partner_system is NULL), enable their ports 1590 */ 1591 active = __get_active_agg(origin); 1592 1593 if (active) { 1594 if (!__agg_has_partner(active)) { 1595 for (port = active->lag_ports; port; 1596 port = port->next_port_in_aggregator) { 1597 __enable_port(port); 1598 } 1599 } 1600 } 1601 1602 rcu_read_unlock(); 1603 1604 bond_3ad_set_carrier(bond); 1605 } 1606 1607 /** 1608 * ad_clear_agg - clear a given aggregator's parameters 1609 * @aggregator: the aggregator we're looking at 1610 */ 1611 static void ad_clear_agg(struct aggregator *aggregator) 1612 { 1613 if (aggregator) { 1614 aggregator->is_individual = false; 1615 aggregator->actor_admin_aggregator_key = 0; 1616 aggregator->actor_oper_aggregator_key = 0; 1617 aggregator->partner_system = null_mac_addr; 1618 aggregator->partner_system_priority = 0; 1619 aggregator->partner_oper_aggregator_key = 0; 1620 aggregator->receive_state = 0; 1621 aggregator->transmit_state = 0; 1622 aggregator->lag_ports = NULL; 1623 aggregator->is_active = 0; 1624 aggregator->num_of_ports = 0; 1625 pr_debug("LAG %d was cleared\n", 1626 aggregator->aggregator_identifier); 1627 } 1628 } 1629 1630 /** 1631 * ad_initialize_agg - initialize a given aggregator's parameters 1632 * @aggregator: the aggregator we're looking at 1633 */ 1634 static void ad_initialize_agg(struct aggregator *aggregator) 1635 { 1636 if (aggregator) { 1637 ad_clear_agg(aggregator); 1638 1639 aggregator->aggregator_mac_address = null_mac_addr; 1640 aggregator->aggregator_identifier = 0; 1641 aggregator->slave = NULL; 1642 } 1643 } 1644 1645 /** 1646 * ad_initialize_port - initialize a given port's parameters 1647 * @aggregator: the aggregator we're looking at 1648 * @lacp_fast: boolean. whether fast periodic should be used 1649 */ 1650 static void ad_initialize_port(struct port *port, int lacp_fast) 1651 { 1652 static const struct port_params tmpl = { 1653 .system_priority = 0xffff, 1654 .key = 1, 1655 .port_number = 1, 1656 .port_priority = 0xff, 1657 .port_state = 1, 1658 }; 1659 static const struct lacpdu lacpdu = { 1660 .subtype = 0x01, 1661 .version_number = 0x01, 1662 .tlv_type_actor_info = 0x01, 1663 .actor_information_length = 0x14, 1664 .tlv_type_partner_info = 0x02, 1665 .partner_information_length = 0x14, 1666 .tlv_type_collector_info = 0x03, 1667 .collector_information_length = 0x10, 1668 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1669 }; 1670 1671 if (port) { 1672 port->actor_port_number = 1; 1673 port->actor_port_priority = 0xff; 1674 port->actor_system = null_mac_addr; 1675 port->actor_system_priority = 0xffff; 1676 port->actor_port_aggregator_identifier = 0; 1677 port->ntt = false; 1678 port->actor_admin_port_key = 1; 1679 port->actor_oper_port_key = 1; 1680 port->actor_admin_port_state = AD_STATE_AGGREGATION | 1681 AD_STATE_LACP_ACTIVITY; 1682 port->actor_oper_port_state = AD_STATE_AGGREGATION | 1683 AD_STATE_LACP_ACTIVITY; 1684 1685 if (lacp_fast) 1686 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1687 1688 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1689 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1690 1691 port->is_enabled = true; 1692 /* private parameters */ 1693 port->sm_vars = 0x3; 1694 port->sm_rx_state = 0; 1695 port->sm_rx_timer_counter = 0; 1696 port->sm_periodic_state = 0; 1697 port->sm_periodic_timer_counter = 0; 1698 port->sm_mux_state = 0; 1699 port->sm_mux_timer_counter = 0; 1700 port->sm_tx_state = 0; 1701 port->sm_tx_timer_counter = 0; 1702 port->slave = NULL; 1703 port->aggregator = NULL; 1704 port->next_port_in_aggregator = NULL; 1705 port->transaction_id = 0; 1706 1707 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1708 } 1709 } 1710 1711 /** 1712 * ad_enable_collecting_distributing - enable a port's transmit/receive 1713 * @port: the port we're looking at 1714 * 1715 * Enable @port if it's in an active aggregator 1716 */ 1717 static void ad_enable_collecting_distributing(struct port *port) 1718 { 1719 if (port->aggregator->is_active) { 1720 pr_debug("Enabling port %d(LAG %d)\n", 1721 port->actor_port_number, 1722 port->aggregator->aggregator_identifier); 1723 __enable_port(port); 1724 } 1725 } 1726 1727 /** 1728 * ad_disable_collecting_distributing - disable a port's transmit/receive 1729 * @port: the port we're looking at 1730 */ 1731 static void ad_disable_collecting_distributing(struct port *port) 1732 { 1733 if (port->aggregator && 1734 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1735 &(null_mac_addr))) { 1736 pr_debug("Disabling port %d(LAG %d)\n", 1737 port->actor_port_number, 1738 port->aggregator->aggregator_identifier); 1739 __disable_port(port); 1740 } 1741 } 1742 1743 /** 1744 * ad_marker_info_received - handle receive of a Marker information frame 1745 * @marker_info: Marker info received 1746 * @port: the port we're looking at 1747 */ 1748 static void ad_marker_info_received(struct bond_marker *marker_info, 1749 struct port *port) 1750 { 1751 struct bond_marker marker; 1752 1753 /* copy the received marker data to the response marker */ 1754 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1755 /* change the marker subtype to marker response */ 1756 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1757 1758 /* send the marker response */ 1759 if (ad_marker_send(port, &marker) >= 0) { 1760 pr_debug("Sent Marker Response on port %d\n", 1761 port->actor_port_number); 1762 } 1763 } 1764 1765 /** 1766 * ad_marker_response_received - handle receive of a marker response frame 1767 * @marker: marker PDU received 1768 * @port: the port we're looking at 1769 * 1770 * This function does nothing since we decided not to implement send and handle 1771 * response for marker PDU's, in this stage, but only to respond to marker 1772 * information. 1773 */ 1774 static void ad_marker_response_received(struct bond_marker *marker, 1775 struct port *port) 1776 { 1777 marker = NULL; 1778 port = NULL; 1779 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1780 } 1781 1782 /* ========= AD exported functions to the main bonding code ========= */ 1783 1784 /* Check aggregators status in team every T seconds */ 1785 #define AD_AGGREGATOR_SELECTION_TIMER 8 1786 1787 /** 1788 * bond_3ad_initiate_agg_selection - initate aggregator selection 1789 * @bond: bonding struct 1790 * 1791 * Set the aggregation selection timer, to initiate an agg selection in 1792 * the very near future. Called during first initialization, and during 1793 * any down to up transitions of the bond. 1794 */ 1795 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1796 { 1797 BOND_AD_INFO(bond).agg_select_timer = timeout; 1798 } 1799 1800 /** 1801 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1802 * @bond: bonding struct to work on 1803 * @tick_resolution: tick duration (millisecond resolution) 1804 * 1805 * Can be called only after the mac address of the bond is set. 1806 */ 1807 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1808 { 1809 /* check that the bond is not initialized yet */ 1810 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1811 bond->dev->dev_addr)) { 1812 1813 BOND_AD_INFO(bond).aggregator_identifier = 0; 1814 1815 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; 1816 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); 1817 1818 /* initialize how many times this module is called in one 1819 * second (should be about every 100ms) 1820 */ 1821 ad_ticks_per_sec = tick_resolution; 1822 1823 bond_3ad_initiate_agg_selection(bond, 1824 AD_AGGREGATOR_SELECTION_TIMER * 1825 ad_ticks_per_sec); 1826 } 1827 } 1828 1829 /** 1830 * bond_3ad_bind_slave - initialize a slave's port 1831 * @slave: slave struct to work on 1832 * 1833 * Returns: 0 on success 1834 * < 0 on error 1835 */ 1836 void bond_3ad_bind_slave(struct slave *slave) 1837 { 1838 struct bonding *bond = bond_get_bond_by_slave(slave); 1839 struct port *port; 1840 struct aggregator *aggregator; 1841 1842 /* check that the slave has not been initialized yet. */ 1843 if (SLAVE_AD_INFO(slave).port.slave != slave) { 1844 1845 /* port initialization */ 1846 port = &(SLAVE_AD_INFO(slave).port); 1847 1848 ad_initialize_port(port, bond->params.lacp_fast); 1849 1850 __initialize_port_locks(slave); 1851 port->slave = slave; 1852 port->actor_port_number = SLAVE_AD_INFO(slave).id; 1853 /* key is determined according to the link speed, duplex and user key(which 1854 * is yet not supported) 1855 */ 1856 port->actor_admin_port_key = 0; 1857 port->actor_admin_port_key |= __get_duplex(port); 1858 port->actor_admin_port_key |= (__get_link_speed(port) << 1); 1859 port->actor_oper_port_key = port->actor_admin_port_key; 1860 /* if the port is not full duplex, then the port should be not 1861 * lacp Enabled 1862 */ 1863 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) 1864 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1865 /* actor system is the bond's system */ 1866 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 1867 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 1868 * lacpdu's are sent in one second) 1869 */ 1870 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1871 port->aggregator = NULL; 1872 port->next_port_in_aggregator = NULL; 1873 1874 __disable_port(port); 1875 1876 /* aggregator initialization */ 1877 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1878 1879 ad_initialize_agg(aggregator); 1880 1881 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 1882 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 1883 aggregator->slave = slave; 1884 aggregator->is_active = 0; 1885 aggregator->num_of_ports = 0; 1886 } 1887 } 1888 1889 /** 1890 * bond_3ad_unbind_slave - deinitialize a slave's port 1891 * @slave: slave struct to work on 1892 * 1893 * Search for the aggregator that is related to this port, remove the 1894 * aggregator and assign another aggregator for other port related to it 1895 * (if any), and remove the port. 1896 */ 1897 void bond_3ad_unbind_slave(struct slave *slave) 1898 { 1899 struct port *port, *prev_port, *temp_port; 1900 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 1901 int select_new_active_agg = 0; 1902 struct bonding *bond = slave->bond; 1903 struct slave *slave_iter; 1904 struct list_head *iter; 1905 1906 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1907 port = &(SLAVE_AD_INFO(slave).port); 1908 1909 /* if slave is null, the whole port is not initialized */ 1910 if (!port->slave) { 1911 pr_warn("Warning: %s: Trying to unbind an uninitialized port on %s\n", 1912 slave->bond->dev->name, slave->dev->name); 1913 return; 1914 } 1915 1916 pr_debug("Unbinding Link Aggregation Group %d\n", 1917 aggregator->aggregator_identifier); 1918 1919 /* Tell the partner that this port is not suitable for aggregation */ 1920 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 1921 __update_lacpdu_from_port(port); 1922 ad_lacpdu_send(port); 1923 1924 /* check if this aggregator is occupied */ 1925 if (aggregator->lag_ports) { 1926 /* check if there are other ports related to this aggregator 1927 * except the port related to this slave(thats ensure us that 1928 * there is a reason to search for new aggregator, and that we 1929 * will find one 1930 */ 1931 if ((aggregator->lag_ports != port) || 1932 (aggregator->lag_ports->next_port_in_aggregator)) { 1933 /* find new aggregator for the related port(s) */ 1934 bond_for_each_slave(bond, slave_iter, iter) { 1935 new_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator); 1936 /* if the new aggregator is empty, or it is 1937 * connected to our port only 1938 */ 1939 if (!new_aggregator->lag_ports || 1940 ((new_aggregator->lag_ports == port) && 1941 !new_aggregator->lag_ports->next_port_in_aggregator)) 1942 break; 1943 } 1944 if (!slave_iter) 1945 new_aggregator = NULL; 1946 1947 /* if new aggregator found, copy the aggregator's 1948 * parameters and connect the related lag_ports to the 1949 * new aggregator 1950 */ 1951 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 1952 pr_debug("Some port(s) related to LAG %d - replacing with LAG %d\n", 1953 aggregator->aggregator_identifier, 1954 new_aggregator->aggregator_identifier); 1955 1956 if ((new_aggregator->lag_ports == port) && 1957 new_aggregator->is_active) { 1958 pr_info("%s: Removing an active aggregator\n", 1959 aggregator->slave->bond->dev->name); 1960 select_new_active_agg = 1; 1961 } 1962 1963 new_aggregator->is_individual = aggregator->is_individual; 1964 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 1965 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 1966 new_aggregator->partner_system = aggregator->partner_system; 1967 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 1968 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 1969 new_aggregator->receive_state = aggregator->receive_state; 1970 new_aggregator->transmit_state = aggregator->transmit_state; 1971 new_aggregator->lag_ports = aggregator->lag_ports; 1972 new_aggregator->is_active = aggregator->is_active; 1973 new_aggregator->num_of_ports = aggregator->num_of_ports; 1974 1975 /* update the information that is written on 1976 * the ports about the aggregator 1977 */ 1978 for (temp_port = aggregator->lag_ports; temp_port; 1979 temp_port = temp_port->next_port_in_aggregator) { 1980 temp_port->aggregator = new_aggregator; 1981 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 1982 } 1983 1984 ad_clear_agg(aggregator); 1985 1986 if (select_new_active_agg) 1987 ad_agg_selection_logic(__get_first_agg(port)); 1988 } else { 1989 pr_warn("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n", 1990 slave->bond->dev->name); 1991 } 1992 } else { 1993 /* in case that the only port related to this 1994 * aggregator is the one we want to remove 1995 */ 1996 select_new_active_agg = aggregator->is_active; 1997 ad_clear_agg(aggregator); 1998 if (select_new_active_agg) { 1999 pr_info("%s: Removing an active aggregator\n", 2000 slave->bond->dev->name); 2001 /* select new active aggregator */ 2002 temp_aggregator = __get_first_agg(port); 2003 if (temp_aggregator) 2004 ad_agg_selection_logic(temp_aggregator); 2005 } 2006 } 2007 } 2008 2009 pr_debug("Unbinding port %d\n", port->actor_port_number); 2010 2011 /* find the aggregator that this port is connected to */ 2012 bond_for_each_slave(bond, slave_iter, iter) { 2013 temp_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator); 2014 prev_port = NULL; 2015 /* search the port in the aggregator's related ports */ 2016 for (temp_port = temp_aggregator->lag_ports; temp_port; 2017 prev_port = temp_port, 2018 temp_port = temp_port->next_port_in_aggregator) { 2019 if (temp_port == port) { 2020 /* the aggregator found - detach the port from 2021 * this aggregator 2022 */ 2023 if (prev_port) 2024 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2025 else 2026 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2027 temp_aggregator->num_of_ports--; 2028 if (temp_aggregator->num_of_ports == 0) { 2029 select_new_active_agg = temp_aggregator->is_active; 2030 ad_clear_agg(temp_aggregator); 2031 if (select_new_active_agg) { 2032 pr_info("%s: Removing an active aggregator\n", 2033 slave->bond->dev->name); 2034 /* select new active aggregator */ 2035 ad_agg_selection_logic(__get_first_agg(port)); 2036 } 2037 } 2038 break; 2039 } 2040 } 2041 } 2042 port->slave = NULL; 2043 } 2044 2045 /** 2046 * bond_3ad_state_machine_handler - handle state machines timeout 2047 * @bond: bonding struct to work on 2048 * 2049 * The state machine handling concept in this module is to check every tick 2050 * which state machine should operate any function. The execution order is 2051 * round robin, so when we have an interaction between state machines, the 2052 * reply of one to each other might be delayed until next tick. 2053 * 2054 * This function also complete the initialization when the agg_select_timer 2055 * times out, and it selects an aggregator for the ports that are yet not 2056 * related to any aggregator, and selects the active aggregator for a bond. 2057 */ 2058 void bond_3ad_state_machine_handler(struct work_struct *work) 2059 { 2060 struct bonding *bond = container_of(work, struct bonding, 2061 ad_work.work); 2062 struct aggregator *aggregator; 2063 struct list_head *iter; 2064 struct slave *slave; 2065 struct port *port; 2066 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2067 2068 read_lock(&bond->lock); 2069 rcu_read_lock(); 2070 2071 /* check if there are any slaves */ 2072 if (!bond_has_slaves(bond)) 2073 goto re_arm; 2074 2075 /* check if agg_select_timer timer after initialize is timed out */ 2076 if (BOND_AD_INFO(bond).agg_select_timer && 2077 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2078 slave = bond_first_slave_rcu(bond); 2079 port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL; 2080 2081 /* select the active aggregator for the bond */ 2082 if (port) { 2083 if (!port->slave) { 2084 pr_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2085 bond->dev->name); 2086 goto re_arm; 2087 } 2088 2089 aggregator = __get_first_agg(port); 2090 ad_agg_selection_logic(aggregator); 2091 } 2092 bond_3ad_set_carrier(bond); 2093 } 2094 2095 /* for each port run the state machines */ 2096 bond_for_each_slave_rcu(bond, slave, iter) { 2097 port = &(SLAVE_AD_INFO(slave).port); 2098 if (!port->slave) { 2099 pr_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2100 bond->dev->name); 2101 goto re_arm; 2102 } 2103 2104 /* Lock around state machines to protect data accessed 2105 * by all (e.g., port->sm_vars). ad_rx_machine may run 2106 * concurrently due to incoming LACPDU. 2107 */ 2108 __get_state_machine_lock(port); 2109 2110 ad_rx_machine(NULL, port); 2111 ad_periodic_machine(port); 2112 ad_port_selection_logic(port); 2113 ad_mux_machine(port); 2114 ad_tx_machine(port); 2115 2116 /* turn off the BEGIN bit, since we already handled it */ 2117 if (port->sm_vars & AD_PORT_BEGIN) 2118 port->sm_vars &= ~AD_PORT_BEGIN; 2119 2120 __release_state_machine_lock(port); 2121 } 2122 2123 re_arm: 2124 bond_for_each_slave_rcu(bond, slave, iter) { 2125 if (slave->should_notify) { 2126 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2127 break; 2128 } 2129 } 2130 rcu_read_unlock(); 2131 read_unlock(&bond->lock); 2132 2133 if (should_notify_rtnl && rtnl_trylock()) { 2134 bond_slave_state_notify(bond); 2135 rtnl_unlock(); 2136 } 2137 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2138 } 2139 2140 /** 2141 * bond_3ad_rx_indication - handle a received frame 2142 * @lacpdu: received lacpdu 2143 * @slave: slave struct to work on 2144 * @length: length of the data received 2145 * 2146 * It is assumed that frames that were sent on this NIC don't returned as new 2147 * received frames (loopback). Since only the payload is given to this 2148 * function, it check for loopback. 2149 */ 2150 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, 2151 u16 length) 2152 { 2153 struct port *port; 2154 int ret = RX_HANDLER_ANOTHER; 2155 2156 if (length >= sizeof(struct lacpdu)) { 2157 2158 port = &(SLAVE_AD_INFO(slave).port); 2159 2160 if (!port->slave) { 2161 pr_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2162 slave->dev->name, slave->bond->dev->name); 2163 return ret; 2164 } 2165 2166 switch (lacpdu->subtype) { 2167 case AD_TYPE_LACPDU: 2168 ret = RX_HANDLER_CONSUMED; 2169 pr_debug("Received LACPDU on port %d\n", 2170 port->actor_port_number); 2171 /* Protect against concurrent state machines */ 2172 __get_state_machine_lock(port); 2173 ad_rx_machine(lacpdu, port); 2174 __release_state_machine_lock(port); 2175 break; 2176 2177 case AD_TYPE_MARKER: 2178 ret = RX_HANDLER_CONSUMED; 2179 /* No need to convert fields to Little Endian since we 2180 * don't use the marker's fields. 2181 */ 2182 2183 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2184 case AD_MARKER_INFORMATION_SUBTYPE: 2185 pr_debug("Received Marker Information on port %d\n", 2186 port->actor_port_number); 2187 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2188 break; 2189 2190 case AD_MARKER_RESPONSE_SUBTYPE: 2191 pr_debug("Received Marker Response on port %d\n", 2192 port->actor_port_number); 2193 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2194 break; 2195 2196 default: 2197 pr_debug("Received an unknown Marker subtype on slot %d\n", 2198 port->actor_port_number); 2199 } 2200 } 2201 } 2202 return ret; 2203 } 2204 2205 /** 2206 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication 2207 * @slave: slave struct to work on 2208 * 2209 * Handle reselection of aggregator (if needed) for this port. 2210 */ 2211 void bond_3ad_adapter_speed_changed(struct slave *slave) 2212 { 2213 struct port *port; 2214 2215 port = &(SLAVE_AD_INFO(slave).port); 2216 2217 /* if slave is null, the whole port is not initialized */ 2218 if (!port->slave) { 2219 pr_warn("Warning: %s: speed changed for uninitialized port on %s\n", 2220 slave->bond->dev->name, slave->dev->name); 2221 return; 2222 } 2223 2224 __get_state_machine_lock(port); 2225 2226 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2227 port->actor_oper_port_key = port->actor_admin_port_key |= 2228 (__get_link_speed(port) << 1); 2229 pr_debug("Port %d changed speed\n", port->actor_port_number); 2230 /* there is no need to reselect a new aggregator, just signal the 2231 * state machines to reinitialize 2232 */ 2233 port->sm_vars |= AD_PORT_BEGIN; 2234 2235 __release_state_machine_lock(port); 2236 } 2237 2238 /** 2239 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication 2240 * @slave: slave struct to work on 2241 * 2242 * Handle reselection of aggregator (if needed) for this port. 2243 */ 2244 void bond_3ad_adapter_duplex_changed(struct slave *slave) 2245 { 2246 struct port *port; 2247 2248 port = &(SLAVE_AD_INFO(slave).port); 2249 2250 /* if slave is null, the whole port is not initialized */ 2251 if (!port->slave) { 2252 pr_warn("%s: Warning: duplex changed for uninitialized port on %s\n", 2253 slave->bond->dev->name, slave->dev->name); 2254 return; 2255 } 2256 2257 __get_state_machine_lock(port); 2258 2259 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2260 port->actor_oper_port_key = port->actor_admin_port_key |= 2261 __get_duplex(port); 2262 pr_debug("Port %d changed duplex\n", port->actor_port_number); 2263 /* there is no need to reselect a new aggregator, just signal the 2264 * state machines to reinitialize 2265 */ 2266 port->sm_vars |= AD_PORT_BEGIN; 2267 2268 __release_state_machine_lock(port); 2269 } 2270 2271 /** 2272 * bond_3ad_handle_link_change - handle a slave's link status change indication 2273 * @slave: slave struct to work on 2274 * @status: whether the link is now up or down 2275 * 2276 * Handle reselection of aggregator (if needed) for this port. 2277 */ 2278 void bond_3ad_handle_link_change(struct slave *slave, char link) 2279 { 2280 struct port *port; 2281 2282 port = &(SLAVE_AD_INFO(slave).port); 2283 2284 /* if slave is null, the whole port is not initialized */ 2285 if (!port->slave) { 2286 pr_warn("Warning: %s: link status changed for uninitialized port on %s\n", 2287 slave->bond->dev->name, slave->dev->name); 2288 return; 2289 } 2290 2291 __get_state_machine_lock(port); 2292 /* on link down we are zeroing duplex and speed since 2293 * some of the adaptors(ce1000.lan) report full duplex/speed 2294 * instead of N/A(duplex) / 0(speed). 2295 * 2296 * on link up we are forcing recheck on the duplex and speed since 2297 * some of he adaptors(ce1000.lan) report. 2298 */ 2299 if (link == BOND_LINK_UP) { 2300 port->is_enabled = true; 2301 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2302 port->actor_oper_port_key = port->actor_admin_port_key |= 2303 __get_duplex(port); 2304 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2305 port->actor_oper_port_key = port->actor_admin_port_key |= 2306 (__get_link_speed(port) << 1); 2307 } else { 2308 /* link has failed */ 2309 port->is_enabled = false; 2310 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2311 port->actor_oper_port_key = (port->actor_admin_port_key &= 2312 ~AD_SPEED_KEY_BITS); 2313 } 2314 pr_debug("Port %d changed link status to %s\n", 2315 port->actor_port_number, 2316 link == BOND_LINK_UP ? "UP" : "DOWN"); 2317 /* there is no need to reselect a new aggregator, just signal the 2318 * state machines to reinitialize 2319 */ 2320 port->sm_vars |= AD_PORT_BEGIN; 2321 2322 __release_state_machine_lock(port); 2323 } 2324 2325 /** 2326 * bond_3ad_set_carrier - set link state for bonding master 2327 * @bond - bonding structure 2328 * 2329 * if we have an active aggregator, we're up, if not, we're down. 2330 * Presumes that we cannot have an active aggregator if there are 2331 * no slaves with link up. 2332 * 2333 * This behavior complies with IEEE 802.3 section 43.3.9. 2334 * 2335 * Called by bond_set_carrier(). Return zero if carrier state does not 2336 * change, nonzero if it does. 2337 */ 2338 int bond_3ad_set_carrier(struct bonding *bond) 2339 { 2340 struct aggregator *active; 2341 struct slave *first_slave; 2342 int ret = 1; 2343 2344 rcu_read_lock(); 2345 first_slave = bond_first_slave_rcu(bond); 2346 if (!first_slave) { 2347 ret = 0; 2348 goto out; 2349 } 2350 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator)); 2351 if (active) { 2352 /* are enough slaves available to consider link up? */ 2353 if (active->num_of_ports < bond->params.min_links) { 2354 if (netif_carrier_ok(bond->dev)) { 2355 netif_carrier_off(bond->dev); 2356 goto out; 2357 } 2358 } else if (!netif_carrier_ok(bond->dev)) { 2359 netif_carrier_on(bond->dev); 2360 goto out; 2361 } 2362 } else if (netif_carrier_ok(bond->dev)) { 2363 netif_carrier_off(bond->dev); 2364 } 2365 out: 2366 rcu_read_unlock(); 2367 return ret; 2368 } 2369 2370 /** 2371 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2372 * @bond: bonding struct to work on 2373 * @ad_info: ad_info struct to fill with the bond's info 2374 * 2375 * Returns: 0 on success 2376 * < 0 on error 2377 */ 2378 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2379 struct ad_info *ad_info) 2380 { 2381 struct aggregator *aggregator = NULL; 2382 struct list_head *iter; 2383 struct slave *slave; 2384 struct port *port; 2385 2386 bond_for_each_slave_rcu(bond, slave, iter) { 2387 port = &(SLAVE_AD_INFO(slave).port); 2388 if (port->aggregator && port->aggregator->is_active) { 2389 aggregator = port->aggregator; 2390 break; 2391 } 2392 } 2393 2394 if (!aggregator) 2395 return -1; 2396 2397 ad_info->aggregator_id = aggregator->aggregator_identifier; 2398 ad_info->ports = aggregator->num_of_ports; 2399 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2400 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2401 ether_addr_copy(ad_info->partner_system, 2402 aggregator->partner_system.mac_addr_value); 2403 return 0; 2404 } 2405 2406 /* Wrapper used to hold bond->lock so no slave manipulation can occur */ 2407 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2408 { 2409 int ret; 2410 2411 rcu_read_lock(); 2412 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2413 rcu_read_unlock(); 2414 2415 return ret; 2416 } 2417 2418 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) 2419 { 2420 struct bonding *bond = netdev_priv(dev); 2421 struct slave *slave, *first_ok_slave; 2422 struct aggregator *agg; 2423 struct ad_info ad_info; 2424 struct list_head *iter; 2425 int slaves_in_agg; 2426 int slave_agg_no; 2427 int agg_id; 2428 2429 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { 2430 pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n", 2431 dev->name); 2432 goto err_free; 2433 } 2434 2435 slaves_in_agg = ad_info.ports; 2436 agg_id = ad_info.aggregator_id; 2437 2438 if (slaves_in_agg == 0) { 2439 pr_debug("%s: Error: active aggregator is empty\n", dev->name); 2440 goto err_free; 2441 } 2442 2443 slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg); 2444 first_ok_slave = NULL; 2445 2446 bond_for_each_slave_rcu(bond, slave, iter) { 2447 agg = SLAVE_AD_INFO(slave).port.aggregator; 2448 if (!agg || agg->aggregator_identifier != agg_id) 2449 continue; 2450 2451 if (slave_agg_no >= 0) { 2452 if (!first_ok_slave && SLAVE_IS_OK(slave)) 2453 first_ok_slave = slave; 2454 slave_agg_no--; 2455 continue; 2456 } 2457 2458 if (SLAVE_IS_OK(slave)) { 2459 bond_dev_queue_xmit(bond, skb, slave->dev); 2460 goto out; 2461 } 2462 } 2463 2464 if (slave_agg_no >= 0) { 2465 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n", 2466 dev->name, agg_id); 2467 goto err_free; 2468 } 2469 2470 /* we couldn't find any suitable slave after the agg_no, so use the 2471 * first suitable found, if found. 2472 */ 2473 if (first_ok_slave) 2474 bond_dev_queue_xmit(bond, skb, first_ok_slave->dev); 2475 else 2476 goto err_free; 2477 2478 out: 2479 return NETDEV_TX_OK; 2480 err_free: 2481 /* no suitable interface, frame not sent */ 2482 dev_kfree_skb_any(skb); 2483 goto out; 2484 } 2485 2486 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2487 struct slave *slave) 2488 { 2489 int ret = RX_HANDLER_ANOTHER; 2490 struct lacpdu *lacpdu, _lacpdu; 2491 2492 if (skb->protocol != PKT_TYPE_LACPDU) 2493 return ret; 2494 2495 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2496 if (!lacpdu) 2497 return ret; 2498 2499 read_lock(&bond->lock); 2500 ret = bond_3ad_rx_indication(lacpdu, slave, skb->len); 2501 read_unlock(&bond->lock); 2502 return ret; 2503 } 2504 2505 /** 2506 * bond_3ad_update_lacp_rate - change the lacp rate 2507 * @bond - bonding struct 2508 * 2509 * When modify lacp_rate parameter via sysfs, 2510 * update actor_oper_port_state of each port. 2511 * 2512 * Hold slave->state_machine_lock, 2513 * so we can modify port->actor_oper_port_state, 2514 * no matter bond is up or down. 2515 */ 2516 void bond_3ad_update_lacp_rate(struct bonding *bond) 2517 { 2518 struct port *port = NULL; 2519 struct list_head *iter; 2520 struct slave *slave; 2521 int lacp_fast; 2522 2523 lacp_fast = bond->params.lacp_fast; 2524 bond_for_each_slave(bond, slave, iter) { 2525 port = &(SLAVE_AD_INFO(slave).port); 2526 __get_state_machine_lock(port); 2527 if (lacp_fast) 2528 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2529 else 2530 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2531 __release_state_machine_lock(port); 2532 } 2533 } 2534