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#include <linux/skbuff.h> 24#include <linux/if_ether.h> 25#include <linux/netdevice.h> 26#include <linux/spinlock.h> 27#include <linux/ethtool.h> 28#include <linux/etherdevice.h> 29#include <linux/if_bonding.h> 30#include <linux/pkt_sched.h> 31#include <net/net_namespace.h> 32#include <net/bonding.h> 33#include <net/bond_3ad.h> 34 35/* General definitions */ 36#define AD_SHORT_TIMEOUT 1 37#define AD_LONG_TIMEOUT 0 38#define AD_STANDBY 0x2 39#define AD_MAX_TX_IN_SECOND 3 40#define AD_COLLECTOR_MAX_DELAY 0 41 42/* Timer definitions (43.4.4 in the 802.3ad standard) */ 43#define AD_FAST_PERIODIC_TIME 1 44#define AD_SLOW_PERIODIC_TIME 30 45#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) 46#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) 47#define AD_CHURN_DETECTION_TIME 60 48#define AD_AGGREGATE_WAIT_TIME 2 49 50/* Port state definitions (43.4.2.2 in the 802.3ad standard) */ 51#define AD_STATE_LACP_ACTIVITY 0x1 52#define AD_STATE_LACP_TIMEOUT 0x2 53#define AD_STATE_AGGREGATION 0x4 54#define AD_STATE_SYNCHRONIZATION 0x8 55#define AD_STATE_COLLECTING 0x10 56#define AD_STATE_DISTRIBUTING 0x20 57#define AD_STATE_DEFAULTED 0x40 58#define AD_STATE_EXPIRED 0x80 59 60/* Port Variables definitions used by the State Machines (43.4.7 in the 61 * 802.3ad standard) 62 */ 63#define AD_PORT_BEGIN 0x1 64#define AD_PORT_LACP_ENABLED 0x2 65#define AD_PORT_ACTOR_CHURN 0x4 66#define AD_PORT_PARTNER_CHURN 0x8 67#define AD_PORT_READY 0x10 68#define AD_PORT_READY_N 0x20 69#define AD_PORT_MATCHED 0x40 70#define AD_PORT_STANDBY 0x80 71#define AD_PORT_SELECTED 0x100 72#define AD_PORT_MOVED 0x200 73#define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN) 74 75/* Port Key definitions 76 * key is determined according to the link speed, duplex and 77 * user key (which is yet not supported) 78 * -------------------------------------------------------------- 79 * Port key : | User key | Speed | Duplex | 80 * -------------------------------------------------------------- 81 * 16 6 1 0 82 */ 83#define AD_DUPLEX_KEY_MASKS 0x1 84#define AD_SPEED_KEY_MASKS 0x3E 85#define AD_USER_KEY_MASKS 0xFFC0 86 87enum ad_link_speed_type { 88 AD_LINK_SPEED_1MBPS = 1, 89 AD_LINK_SPEED_10MBPS, 90 AD_LINK_SPEED_100MBPS, 91 AD_LINK_SPEED_1000MBPS, 92 AD_LINK_SPEED_2500MBPS, 93 AD_LINK_SPEED_10000MBPS, 94 AD_LINK_SPEED_20000MBPS, 95 AD_LINK_SPEED_40000MBPS, 96 AD_LINK_SPEED_56000MBPS 97}; 98 99/* compare MAC addresses */ 100#define MAC_ADDRESS_EQUAL(A, B) \ 101 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 102 103static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; 104static u16 ad_ticks_per_sec; 105static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 106 107static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; 108 109/* ================= main 802.3ad protocol functions ================== */ 110static int ad_lacpdu_send(struct port *port); 111static int ad_marker_send(struct port *port, struct bond_marker *marker); 112static void ad_mux_machine(struct port *port, bool *update_slave_arr); 113static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 114static void ad_tx_machine(struct port *port); 115static void ad_periodic_machine(struct port *port); 116static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 117static void ad_agg_selection_logic(struct aggregator *aggregator, 118 bool *update_slave_arr); 119static void ad_clear_agg(struct aggregator *aggregator); 120static void ad_initialize_agg(struct aggregator *aggregator); 121static void ad_initialize_port(struct port *port, int lacp_fast); 122static void ad_enable_collecting_distributing(struct port *port, 123 bool *update_slave_arr); 124static void ad_disable_collecting_distributing(struct port *port, 125 bool *update_slave_arr); 126static void ad_marker_info_received(struct bond_marker *marker_info, 127 struct port *port); 128static void ad_marker_response_received(struct bond_marker *marker, 129 struct port *port); 130 131 132/* ================= api to bonding and kernel code ================== */ 133 134/** 135 * __get_bond_by_port - get the port's bonding struct 136 * @port: the port we're looking at 137 * 138 * Return @port's bonding struct, or %NULL if it can't be found. 139 */ 140static inline struct bonding *__get_bond_by_port(struct port *port) 141{ 142 if (port->slave == NULL) 143 return NULL; 144 145 return bond_get_bond_by_slave(port->slave); 146} 147 148/** 149 * __get_first_agg - get the first aggregator in the bond 150 * @bond: the bond we're looking at 151 * 152 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 153 * found. 154 * The caller must hold RCU or RTNL lock. 155 */ 156static inline struct aggregator *__get_first_agg(struct port *port) 157{ 158 struct bonding *bond = __get_bond_by_port(port); 159 struct slave *first_slave; 160 struct aggregator *agg; 161 162 /* If there's no bond for this port, or bond has no slaves */ 163 if (bond == NULL) 164 return NULL; 165 166 rcu_read_lock(); 167 first_slave = bond_first_slave_rcu(bond); 168 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 169 rcu_read_unlock(); 170 171 return agg; 172} 173 174/** 175 * __agg_has_partner - see if we have a partner 176 * @agg: the agregator we're looking at 177 * 178 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 179 * address for the partner). Return 0 if not. 180 */ 181static inline int __agg_has_partner(struct aggregator *agg) 182{ 183 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 184} 185 186/** 187 * __disable_port - disable the port's slave 188 * @port: the port we're looking at 189 */ 190static inline void __disable_port(struct port *port) 191{ 192 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 193} 194 195/** 196 * __enable_port - enable the port's slave, if it's up 197 * @port: the port we're looking at 198 */ 199static inline void __enable_port(struct port *port) 200{ 201 struct slave *slave = port->slave; 202 203 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 204 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 205} 206 207/** 208 * __port_is_enabled - check if the port's slave is in active state 209 * @port: the port we're looking at 210 */ 211static inline int __port_is_enabled(struct port *port) 212{ 213 return bond_is_active_slave(port->slave); 214} 215 216/** 217 * __get_agg_selection_mode - get the aggregator selection mode 218 * @port: the port we're looking at 219 * 220 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 221 */ 222static inline u32 __get_agg_selection_mode(struct port *port) 223{ 224 struct bonding *bond = __get_bond_by_port(port); 225 226 if (bond == NULL) 227 return BOND_AD_STABLE; 228 229 return bond->params.ad_select; 230} 231 232/** 233 * __check_agg_selection_timer - check if the selection timer has expired 234 * @port: the port we're looking at 235 */ 236static inline int __check_agg_selection_timer(struct port *port) 237{ 238 struct bonding *bond = __get_bond_by_port(port); 239 240 if (bond == NULL) 241 return 0; 242 243 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 244} 245 246/** 247 * __get_link_speed - get a port's speed 248 * @port: the port we're looking at 249 * 250 * Return @port's speed in 802.3ad enum format. i.e. one of: 251 * 0, 252 * %AD_LINK_SPEED_10MBPS, 253 * %AD_LINK_SPEED_100MBPS, 254 * %AD_LINK_SPEED_1000MBPS, 255 * %AD_LINK_SPEED_2500MBPS, 256 * %AD_LINK_SPEED_10000MBPS 257 * %AD_LINK_SPEED_20000MBPS 258 * %AD_LINK_SPEED_40000MBPS 259 * %AD_LINK_SPEED_56000MBPS 260 */ 261static u16 __get_link_speed(struct port *port) 262{ 263 struct slave *slave = port->slave; 264 u16 speed; 265 266 /* this if covers only a special case: when the configuration starts 267 * with link down, it sets the speed to 0. 268 * This is done in spite of the fact that the e100 driver reports 0 269 * to be compatible with MVT in the future. 270 */ 271 if (slave->link != BOND_LINK_UP) 272 speed = 0; 273 else { 274 switch (slave->speed) { 275 case SPEED_10: 276 speed = AD_LINK_SPEED_10MBPS; 277 break; 278 279 case SPEED_100: 280 speed = AD_LINK_SPEED_100MBPS; 281 break; 282 283 case SPEED_1000: 284 speed = AD_LINK_SPEED_1000MBPS; 285 break; 286 287 case SPEED_2500: 288 speed = AD_LINK_SPEED_2500MBPS; 289 break; 290 291 case SPEED_10000: 292 speed = AD_LINK_SPEED_10000MBPS; 293 break; 294 295 case SPEED_20000: 296 speed = AD_LINK_SPEED_20000MBPS; 297 break; 298 299 case SPEED_40000: 300 speed = AD_LINK_SPEED_40000MBPS; 301 break; 302 303 case SPEED_56000: 304 speed = AD_LINK_SPEED_56000MBPS; 305 break; 306 307 default: 308 /* unknown speed value from ethtool. shouldn't happen */ 309 speed = 0; 310 break; 311 } 312 } 313 314 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", 315 port->actor_port_number, speed); 316 return speed; 317} 318 319/** 320 * __get_duplex - get a port's duplex 321 * @port: the port we're looking at 322 * 323 * Return @port's duplex in 802.3ad bitmask format. i.e.: 324 * 0x01 if in full duplex 325 * 0x00 otherwise 326 */ 327static u8 __get_duplex(struct port *port) 328{ 329 struct slave *slave = port->slave; 330 u8 retval; 331 332 /* handling a special case: when the configuration starts with 333 * link down, it sets the duplex to 0. 334 */ 335 if (slave->link != BOND_LINK_UP) { 336 retval = 0x0; 337 } else { 338 switch (slave->duplex) { 339 case DUPLEX_FULL: 340 retval = 0x1; 341 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", 342 port->actor_port_number); 343 break; 344 case DUPLEX_HALF: 345 default: 346 retval = 0x0; 347 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", 348 port->actor_port_number); 349 break; 350 } 351 } 352 return retval; 353} 354 355/* Conversions */ 356 357/** 358 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 359 * @timer_type: which timer to operate 360 * @par: timer parameter. see below 361 * 362 * If @timer_type is %current_while_timer, @par indicates long/short timer. 363 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 364 * %SLOW_PERIODIC_TIME. 365 */ 366static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 367{ 368 u16 retval = 0; /* to silence the compiler */ 369 370 switch (timer_type) { 371 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 372 if (par) 373 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 374 else 375 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 376 break; 377 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 378 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 379 break; 380 case AD_PERIODIC_TIMER: /* for periodic machine */ 381 retval = (par*ad_ticks_per_sec); /* long timeout */ 382 break; 383 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 384 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 385 break; 386 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 387 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 388 break; 389 } 390 391 return retval; 392} 393 394 395/* ================= ad_rx_machine helper functions ================== */ 396 397/** 398 * __choose_matched - update a port's matched variable from a received lacpdu 399 * @lacpdu: the lacpdu we've received 400 * @port: the port we're looking at 401 * 402 * Update the value of the matched variable, using parameter values from a 403 * newly received lacpdu. Parameter values for the partner carried in the 404 * received PDU are compared with the corresponding operational parameter 405 * values for the actor. Matched is set to TRUE if all of these parameters 406 * match and the PDU parameter partner_state.aggregation has the same value as 407 * actor_oper_port_state.aggregation and lacp will actively maintain the link 408 * in the aggregation. Matched is also set to TRUE if the value of 409 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 410 * an individual link and lacp will actively maintain the link. Otherwise, 411 * matched is set to FALSE. LACP is considered to be actively maintaining the 412 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 413 * the actor's actor_oper_port_state.lacp_activity and the PDU's 414 * partner_state.lacp_activity variables are TRUE. 415 * 416 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 417 * used here to implement the language from 802.3ad 43.4.9 that requires 418 * recordPDU to "match" the LACPDU parameters to the stored values. 419 */ 420static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 421{ 422 /* check if all parameters are alike 423 * or this is individual link(aggregation == FALSE) 424 * then update the state machine Matched variable. 425 */ 426 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 427 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 428 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 429 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 430 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 431 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 432 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 433 ) { 434 port->sm_vars |= AD_PORT_MATCHED; 435 } else { 436 port->sm_vars &= ~AD_PORT_MATCHED; 437 } 438} 439 440/** 441 * __record_pdu - record parameters from a received lacpdu 442 * @lacpdu: the lacpdu we've received 443 * @port: the port we're looking at 444 * 445 * Record the parameter values for the Actor carried in a received lacpdu as 446 * the current partner operational parameter values and sets 447 * actor_oper_port_state.defaulted to FALSE. 448 */ 449static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 450{ 451 if (lacpdu && port) { 452 struct port_params *partner = &port->partner_oper; 453 454 __choose_matched(lacpdu, port); 455 /* record the new parameter values for the partner 456 * operational 457 */ 458 partner->port_number = ntohs(lacpdu->actor_port); 459 partner->port_priority = ntohs(lacpdu->actor_port_priority); 460 partner->system = lacpdu->actor_system; 461 partner->system_priority = ntohs(lacpdu->actor_system_priority); 462 partner->key = ntohs(lacpdu->actor_key); 463 partner->port_state = lacpdu->actor_state; 464 465 /* set actor_oper_port_state.defaulted to FALSE */ 466 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 467 468 /* set the partner sync. to on if the partner is sync, 469 * and the port is matched 470 */ 471 if ((port->sm_vars & AD_PORT_MATCHED) && 472 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 473 partner->port_state |= AD_STATE_SYNCHRONIZATION; 474 pr_debug("%s partner sync=1\n", port->slave->dev->name); 475 } else { 476 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 477 pr_debug("%s partner sync=0\n", port->slave->dev->name); 478 } 479 } 480} 481 482/** 483 * __record_default - record default parameters 484 * @port: the port we're looking at 485 * 486 * This function records the default parameter values for the partner carried 487 * in the Partner Admin parameters as the current partner operational parameter 488 * values and sets actor_oper_port_state.defaulted to TRUE. 489 */ 490static void __record_default(struct port *port) 491{ 492 if (port) { 493 /* record the partner admin parameters */ 494 memcpy(&port->partner_oper, &port->partner_admin, 495 sizeof(struct port_params)); 496 497 /* set actor_oper_port_state.defaulted to true */ 498 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 499 } 500} 501 502/** 503 * __update_selected - update a port's Selected variable from a received lacpdu 504 * @lacpdu: the lacpdu we've received 505 * @port: the port we're looking at 506 * 507 * Update the value of the selected variable, using parameter values from a 508 * newly received lacpdu. The parameter values for the Actor carried in the 509 * received PDU are compared with the corresponding operational parameter 510 * values for the ports partner. If one or more of the comparisons shows that 511 * the value(s) received in the PDU differ from the current operational values, 512 * then selected is set to FALSE and actor_oper_port_state.synchronization is 513 * set to out_of_sync. Otherwise, selected remains unchanged. 514 */ 515static void __update_selected(struct lacpdu *lacpdu, struct port *port) 516{ 517 if (lacpdu && port) { 518 const struct port_params *partner = &port->partner_oper; 519 520 /* check if any parameter is different then 521 * update the state machine selected variable. 522 */ 523 if (ntohs(lacpdu->actor_port) != partner->port_number || 524 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 525 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 526 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 527 ntohs(lacpdu->actor_key) != partner->key || 528 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 529 port->sm_vars &= ~AD_PORT_SELECTED; 530 } 531 } 532} 533 534/** 535 * __update_default_selected - update a port's Selected variable from Partner 536 * @port: the port we're looking at 537 * 538 * This function updates the value of the selected variable, using the partner 539 * administrative parameter values. The administrative values are compared with 540 * the corresponding operational parameter values for the partner. If one or 541 * more of the comparisons shows that the administrative value(s) differ from 542 * the current operational values, then Selected is set to FALSE and 543 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 544 * Selected remains unchanged. 545 */ 546static void __update_default_selected(struct port *port) 547{ 548 if (port) { 549 const struct port_params *admin = &port->partner_admin; 550 const struct port_params *oper = &port->partner_oper; 551 552 /* check if any parameter is different then 553 * update the state machine selected variable. 554 */ 555 if (admin->port_number != oper->port_number || 556 admin->port_priority != oper->port_priority || 557 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 558 admin->system_priority != oper->system_priority || 559 admin->key != oper->key || 560 (admin->port_state & AD_STATE_AGGREGATION) 561 != (oper->port_state & AD_STATE_AGGREGATION)) { 562 port->sm_vars &= ~AD_PORT_SELECTED; 563 } 564 } 565} 566 567/** 568 * __update_ntt - update a port's ntt variable from a received lacpdu 569 * @lacpdu: the lacpdu we've received 570 * @port: the port we're looking at 571 * 572 * Updates the value of the ntt variable, using parameter values from a newly 573 * received lacpdu. The parameter values for the partner carried in the 574 * received PDU are compared with the corresponding operational parameter 575 * values for the Actor. If one or more of the comparisons shows that the 576 * value(s) received in the PDU differ from the current operational values, 577 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 578 */ 579static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 580{ 581 /* validate lacpdu and port */ 582 if (lacpdu && port) { 583 /* check if any parameter is different then 584 * update the port->ntt. 585 */ 586 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 587 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 588 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 589 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 590 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 591 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 592 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 593 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 594 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 595 ) { 596 port->ntt = true; 597 } 598 } 599} 600 601/** 602 * __agg_ports_are_ready - check if all ports in an aggregator are ready 603 * @aggregator: the aggregator we're looking at 604 * 605 */ 606static int __agg_ports_are_ready(struct aggregator *aggregator) 607{ 608 struct port *port; 609 int retval = 1; 610 611 if (aggregator) { 612 /* scan all ports in this aggregator to verfy if they are 613 * all ready. 614 */ 615 for (port = aggregator->lag_ports; 616 port; 617 port = port->next_port_in_aggregator) { 618 if (!(port->sm_vars & AD_PORT_READY_N)) { 619 retval = 0; 620 break; 621 } 622 } 623 } 624 625 return retval; 626} 627 628/** 629 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 630 * @aggregator: the aggregator we're looking at 631 * @val: Should the ports' ready bit be set on or off 632 * 633 */ 634static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 635{ 636 struct port *port; 637 638 for (port = aggregator->lag_ports; port; 639 port = port->next_port_in_aggregator) { 640 if (val) 641 port->sm_vars |= AD_PORT_READY; 642 else 643 port->sm_vars &= ~AD_PORT_READY; 644 } 645} 646 647/** 648 * __get_agg_bandwidth - get the total bandwidth of an aggregator 649 * @aggregator: the aggregator we're looking at 650 * 651 */ 652static u32 __get_agg_bandwidth(struct aggregator *aggregator) 653{ 654 u32 bandwidth = 0; 655 656 if (aggregator->num_of_ports) { 657 switch (__get_link_speed(aggregator->lag_ports)) { 658 case AD_LINK_SPEED_1MBPS: 659 bandwidth = aggregator->num_of_ports; 660 break; 661 case AD_LINK_SPEED_10MBPS: 662 bandwidth = aggregator->num_of_ports * 10; 663 break; 664 case AD_LINK_SPEED_100MBPS: 665 bandwidth = aggregator->num_of_ports * 100; 666 break; 667 case AD_LINK_SPEED_1000MBPS: 668 bandwidth = aggregator->num_of_ports * 1000; 669 break; 670 case AD_LINK_SPEED_2500MBPS: 671 bandwidth = aggregator->num_of_ports * 2500; 672 break; 673 case AD_LINK_SPEED_10000MBPS: 674 bandwidth = aggregator->num_of_ports * 10000; 675 break; 676 case AD_LINK_SPEED_20000MBPS: 677 bandwidth = aggregator->num_of_ports * 20000; 678 break; 679 case AD_LINK_SPEED_40000MBPS: 680 bandwidth = aggregator->num_of_ports * 40000; 681 break; 682 case AD_LINK_SPEED_56000MBPS: 683 bandwidth = aggregator->num_of_ports * 56000; 684 break; 685 default: 686 bandwidth = 0; /* to silence the compiler */ 687 } 688 } 689 return bandwidth; 690} 691 692/** 693 * __get_active_agg - get the current active aggregator 694 * @aggregator: the aggregator we're looking at 695 * 696 * Caller must hold RCU lock. 697 */ 698static struct aggregator *__get_active_agg(struct aggregator *aggregator) 699{ 700 struct bonding *bond = aggregator->slave->bond; 701 struct list_head *iter; 702 struct slave *slave; 703 704 bond_for_each_slave_rcu(bond, slave, iter) 705 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 706 return &(SLAVE_AD_INFO(slave)->aggregator); 707 708 return NULL; 709} 710 711/** 712 * __update_lacpdu_from_port - update a port's lacpdu fields 713 * @port: the port we're looking at 714 */ 715static inline void __update_lacpdu_from_port(struct port *port) 716{ 717 struct lacpdu *lacpdu = &port->lacpdu; 718 const struct port_params *partner = &port->partner_oper; 719 720 /* update current actual Actor parameters 721 * lacpdu->subtype initialized 722 * lacpdu->version_number initialized 723 * lacpdu->tlv_type_actor_info initialized 724 * lacpdu->actor_information_length initialized 725 */ 726 727 lacpdu->actor_system_priority = htons(port->actor_system_priority); 728 lacpdu->actor_system = port->actor_system; 729 lacpdu->actor_key = htons(port->actor_oper_port_key); 730 lacpdu->actor_port_priority = htons(port->actor_port_priority); 731 lacpdu->actor_port = htons(port->actor_port_number); 732 lacpdu->actor_state = port->actor_oper_port_state; 733 pr_debug("update lacpdu: %s, actor port state %x\n", 734 port->slave->dev->name, port->actor_oper_port_state); 735 736 /* lacpdu->reserved_3_1 initialized 737 * lacpdu->tlv_type_partner_info initialized 738 * lacpdu->partner_information_length initialized 739 */ 740 741 lacpdu->partner_system_priority = htons(partner->system_priority); 742 lacpdu->partner_system = partner->system; 743 lacpdu->partner_key = htons(partner->key); 744 lacpdu->partner_port_priority = htons(partner->port_priority); 745 lacpdu->partner_port = htons(partner->port_number); 746 lacpdu->partner_state = partner->port_state; 747 748 /* lacpdu->reserved_3_2 initialized 749 * lacpdu->tlv_type_collector_info initialized 750 * lacpdu->collector_information_length initialized 751 * collector_max_delay initialized 752 * reserved_12[12] initialized 753 * tlv_type_terminator initialized 754 * terminator_length initialized 755 * reserved_50[50] initialized 756 */ 757} 758 759/* ================= main 802.3ad protocol code ========================= */ 760 761/** 762 * ad_lacpdu_send - send out a lacpdu packet on a given port 763 * @port: the port we're looking at 764 * 765 * Returns: 0 on success 766 * < 0 on error 767 */ 768static int ad_lacpdu_send(struct port *port) 769{ 770 struct slave *slave = port->slave; 771 struct sk_buff *skb; 772 struct lacpdu_header *lacpdu_header; 773 int length = sizeof(struct lacpdu_header); 774 775 skb = dev_alloc_skb(length); 776 if (!skb) 777 return -ENOMEM; 778 779 skb->dev = slave->dev; 780 skb_reset_mac_header(skb); 781 skb->network_header = skb->mac_header + ETH_HLEN; 782 skb->protocol = PKT_TYPE_LACPDU; 783 skb->priority = TC_PRIO_CONTROL; 784 785 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 786 787 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 788 /* Note: source address is set to be the member's PERMANENT address, 789 * because we use it to identify loopback lacpdus in receive. 790 */ 791 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 792 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 793 794 lacpdu_header->lacpdu = port->lacpdu; 795 796 dev_queue_xmit(skb); 797 798 return 0; 799} 800 801/** 802 * ad_marker_send - send marker information/response on a given port 803 * @port: the port we're looking at 804 * @marker: marker data to send 805 * 806 * Returns: 0 on success 807 * < 0 on error 808 */ 809static int ad_marker_send(struct port *port, struct bond_marker *marker) 810{ 811 struct slave *slave = port->slave; 812 struct sk_buff *skb; 813 struct bond_marker_header *marker_header; 814 int length = sizeof(struct bond_marker_header); 815 816 skb = dev_alloc_skb(length + 16); 817 if (!skb) 818 return -ENOMEM; 819 820 skb_reserve(skb, 16); 821 822 skb->dev = slave->dev; 823 skb_reset_mac_header(skb); 824 skb->network_header = skb->mac_header + ETH_HLEN; 825 skb->protocol = PKT_TYPE_LACPDU; 826 827 marker_header = (struct bond_marker_header *)skb_put(skb, length); 828 829 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 830 /* Note: source address is set to be the member's PERMANENT address, 831 * because we use it to identify loopback MARKERs in receive. 832 */ 833 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 834 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 835 836 marker_header->marker = *marker; 837 838 dev_queue_xmit(skb); 839 840 return 0; 841} 842 843/** 844 * ad_mux_machine - handle a port's mux state machine 845 * @port: the port we're looking at 846 * @update_slave_arr: Does slave array need update? 847 */ 848static void ad_mux_machine(struct port *port, bool *update_slave_arr) 849{ 850 mux_states_t last_state; 851 852 /* keep current State Machine state to compare later if it was 853 * changed 854 */ 855 last_state = port->sm_mux_state; 856 857 if (port->sm_vars & AD_PORT_BEGIN) { 858 port->sm_mux_state = AD_MUX_DETACHED; 859 } else { 860 switch (port->sm_mux_state) { 861 case AD_MUX_DETACHED: 862 if ((port->sm_vars & AD_PORT_SELECTED) 863 || (port->sm_vars & AD_PORT_STANDBY)) 864 /* if SELECTED or STANDBY */ 865 port->sm_mux_state = AD_MUX_WAITING; 866 break; 867 case AD_MUX_WAITING: 868 /* if SELECTED == FALSE return to DETACH state */ 869 if (!(port->sm_vars & AD_PORT_SELECTED)) { 870 port->sm_vars &= ~AD_PORT_READY_N; 871 /* in order to withhold the Selection Logic to 872 * check all ports READY_N value every callback 873 * cycle to update ready variable, we check 874 * READY_N and update READY here 875 */ 876 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 877 port->sm_mux_state = AD_MUX_DETACHED; 878 break; 879 } 880 881 /* check if the wait_while_timer expired */ 882 if (port->sm_mux_timer_counter 883 && !(--port->sm_mux_timer_counter)) 884 port->sm_vars |= AD_PORT_READY_N; 885 886 /* in order to withhold the selection logic to check 887 * all ports READY_N value every callback cycle to 888 * update ready variable, we check READY_N and update 889 * READY here 890 */ 891 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 892 893 /* if the wait_while_timer expired, and the port is 894 * in READY state, move to ATTACHED state 895 */ 896 if ((port->sm_vars & AD_PORT_READY) 897 && !port->sm_mux_timer_counter) 898 port->sm_mux_state = AD_MUX_ATTACHED; 899 break; 900 case AD_MUX_ATTACHED: 901 /* check also if agg_select_timer expired (so the 902 * edable port will take place only after this timer) 903 */ 904 if ((port->sm_vars & AD_PORT_SELECTED) && 905 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && 906 !__check_agg_selection_timer(port)) { 907 if (port->aggregator->is_active) 908 port->sm_mux_state = 909 AD_MUX_COLLECTING_DISTRIBUTING; 910 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 911 (port->sm_vars & AD_PORT_STANDBY)) { 912 /* if UNSELECTED or STANDBY */ 913 port->sm_vars &= ~AD_PORT_READY_N; 914 /* in order to withhold the selection logic to 915 * check all ports READY_N value every callback 916 * cycle to update ready variable, we check 917 * READY_N and update READY here 918 */ 919 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 920 port->sm_mux_state = AD_MUX_DETACHED; 921 } else if (port->aggregator->is_active) { 922 port->actor_oper_port_state |= 923 AD_STATE_SYNCHRONIZATION; 924 } 925 break; 926 case AD_MUX_COLLECTING_DISTRIBUTING: 927 if (!(port->sm_vars & AD_PORT_SELECTED) || 928 (port->sm_vars & AD_PORT_STANDBY) || 929 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || 930 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { 931 port->sm_mux_state = AD_MUX_ATTACHED; 932 } else { 933 /* if port state hasn't changed make 934 * sure that a collecting distributing 935 * port in an active aggregator is enabled 936 */ 937 if (port->aggregator && 938 port->aggregator->is_active && 939 !__port_is_enabled(port)) { 940 941 __enable_port(port); 942 } 943 } 944 break; 945 default: 946 break; 947 } 948 } 949 950 /* check if the state machine was changed */ 951 if (port->sm_mux_state != last_state) { 952 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 953 port->actor_port_number, 954 port->slave->dev->name, 955 last_state, 956 port->sm_mux_state); 957 switch (port->sm_mux_state) { 958 case AD_MUX_DETACHED: 959 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 960 ad_disable_collecting_distributing(port, 961 update_slave_arr); 962 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 963 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 964 port->ntt = true; 965 break; 966 case AD_MUX_WAITING: 967 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 968 break; 969 case AD_MUX_ATTACHED: 970 if (port->aggregator->is_active) 971 port->actor_oper_port_state |= 972 AD_STATE_SYNCHRONIZATION; 973 else 974 port->actor_oper_port_state &= 975 ~AD_STATE_SYNCHRONIZATION; 976 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 977 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 978 ad_disable_collecting_distributing(port, 979 update_slave_arr); 980 port->ntt = true; 981 break; 982 case AD_MUX_COLLECTING_DISTRIBUTING: 983 port->actor_oper_port_state |= AD_STATE_COLLECTING; 984 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 985 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 986 ad_enable_collecting_distributing(port, 987 update_slave_arr); 988 port->ntt = true; 989 break; 990 default: 991 break; 992 } 993 } 994} 995 996/** 997 * ad_rx_machine - handle a port's rx State Machine 998 * @lacpdu: the lacpdu we've received 999 * @port: the port we're looking at 1000 * 1001 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1002 * CURRENT. If timer expired set the state machine in the proper state. 1003 * In other cases, this function checks if we need to switch to other state. 1004 */ 1005static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1006{ 1007 rx_states_t last_state; 1008 1009 /* keep current State Machine state to compare later if it was 1010 * changed 1011 */ 1012 last_state = port->sm_rx_state; 1013 1014 /* check if state machine should change state */ 1015 1016 /* first, check if port was reinitialized */ 1017 if (port->sm_vars & AD_PORT_BEGIN) { 1018 port->sm_rx_state = AD_RX_INITIALIZE; 1019 port->sm_vars |= AD_PORT_CHURNED; 1020 /* check if port is not enabled */ 1021 } else if (!(port->sm_vars & AD_PORT_BEGIN) 1022 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) 1023 port->sm_rx_state = AD_RX_PORT_DISABLED; 1024 /* check if new lacpdu arrived */ 1025 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1026 (port->sm_rx_state == AD_RX_DEFAULTED) || 1027 (port->sm_rx_state == AD_RX_CURRENT))) { 1028 if (port->sm_rx_state != AD_RX_CURRENT) 1029 port->sm_vars |= AD_PORT_CHURNED; 1030 port->sm_rx_timer_counter = 0; 1031 port->sm_rx_state = AD_RX_CURRENT; 1032 } else { 1033 /* if timer is on, and if it is expired */ 1034 if (port->sm_rx_timer_counter && 1035 !(--port->sm_rx_timer_counter)) { 1036 switch (port->sm_rx_state) { 1037 case AD_RX_EXPIRED: 1038 port->sm_rx_state = AD_RX_DEFAULTED; 1039 break; 1040 case AD_RX_CURRENT: 1041 port->sm_rx_state = AD_RX_EXPIRED; 1042 break; 1043 default: 1044 break; 1045 } 1046 } else { 1047 /* if no lacpdu arrived and no timer is on */ 1048 switch (port->sm_rx_state) { 1049 case AD_RX_PORT_DISABLED: 1050 if (port->sm_vars & AD_PORT_MOVED) 1051 port->sm_rx_state = AD_RX_INITIALIZE; 1052 else if (port->is_enabled 1053 && (port->sm_vars 1054 & AD_PORT_LACP_ENABLED)) 1055 port->sm_rx_state = AD_RX_EXPIRED; 1056 else if (port->is_enabled 1057 && ((port->sm_vars 1058 & AD_PORT_LACP_ENABLED) == 0)) 1059 port->sm_rx_state = AD_RX_LACP_DISABLED; 1060 break; 1061 default: 1062 break; 1063 1064 } 1065 } 1066 } 1067 1068 /* check if the State machine was changed or new lacpdu arrived */ 1069 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1070 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1071 port->actor_port_number, 1072 port->slave->dev->name, 1073 last_state, 1074 port->sm_rx_state); 1075 switch (port->sm_rx_state) { 1076 case AD_RX_INITIALIZE: 1077 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1078 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1079 else 1080 port->sm_vars |= AD_PORT_LACP_ENABLED; 1081 port->sm_vars &= ~AD_PORT_SELECTED; 1082 __record_default(port); 1083 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1084 port->sm_vars &= ~AD_PORT_MOVED; 1085 port->sm_rx_state = AD_RX_PORT_DISABLED; 1086 1087 /* Fall Through */ 1088 case AD_RX_PORT_DISABLED: 1089 port->sm_vars &= ~AD_PORT_MATCHED; 1090 break; 1091 case AD_RX_LACP_DISABLED: 1092 port->sm_vars &= ~AD_PORT_SELECTED; 1093 __record_default(port); 1094 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1095 port->sm_vars |= AD_PORT_MATCHED; 1096 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1097 break; 1098 case AD_RX_EXPIRED: 1099 /* Reset of the Synchronization flag (Standard 43.4.12) 1100 * This reset cause to disable this port in the 1101 * COLLECTING_DISTRIBUTING state of the mux machine in 1102 * case of EXPIRED even if LINK_DOWN didn't arrive for 1103 * the port. 1104 */ 1105 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1106 port->sm_vars &= ~AD_PORT_MATCHED; 1107 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; 1108 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; 1109 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1110 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1111 port->sm_vars |= AD_PORT_CHURNED; 1112 break; 1113 case AD_RX_DEFAULTED: 1114 __update_default_selected(port); 1115 __record_default(port); 1116 port->sm_vars |= AD_PORT_MATCHED; 1117 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1118 break; 1119 case AD_RX_CURRENT: 1120 /* detect loopback situation */ 1121 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1122 &(port->actor_system))) { 1123 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" 1124 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1125 port->slave->dev->name); 1126 return; 1127 } 1128 __update_selected(lacpdu, port); 1129 __update_ntt(lacpdu, port); 1130 __record_pdu(lacpdu, port); 1131 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1132 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1133 break; 1134 default: 1135 break; 1136 } 1137 } 1138} 1139 1140/** 1141 * ad_churn_machine - handle port churn's state machine 1142 * @port: the port we're looking at 1143 * 1144 */ 1145static void ad_churn_machine(struct port *port) 1146{ 1147 if (port->sm_vars & AD_PORT_CHURNED) { 1148 port->sm_vars &= ~AD_PORT_CHURNED; 1149 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1150 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1151 port->sm_churn_actor_timer_counter = 1152 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1153 port->sm_churn_partner_timer_counter = 1154 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1155 return; 1156 } 1157 if (port->sm_churn_actor_timer_counter && 1158 !(--port->sm_churn_actor_timer_counter) && 1159 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1160 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { 1161 port->sm_churn_actor_state = AD_NO_CHURN; 1162 } else { 1163 port->churn_actor_count++; 1164 port->sm_churn_actor_state = AD_CHURN; 1165 } 1166 } 1167 if (port->sm_churn_partner_timer_counter && 1168 !(--port->sm_churn_partner_timer_counter) && 1169 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1170 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { 1171 port->sm_churn_partner_state = AD_NO_CHURN; 1172 } else { 1173 port->churn_partner_count++; 1174 port->sm_churn_partner_state = AD_CHURN; 1175 } 1176 } 1177} 1178 1179/** 1180 * ad_tx_machine - handle a port's tx state machine 1181 * @port: the port we're looking at 1182 */ 1183static void ad_tx_machine(struct port *port) 1184{ 1185 /* check if tx timer expired, to verify that we do not send more than 1186 * 3 packets per second 1187 */ 1188 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1189 /* check if there is something to send */ 1190 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1191 __update_lacpdu_from_port(port); 1192 1193 if (ad_lacpdu_send(port) >= 0) { 1194 pr_debug("Sent LACPDU on port %d\n", 1195 port->actor_port_number); 1196 1197 /* mark ntt as false, so it will not be sent 1198 * again until demanded 1199 */ 1200 port->ntt = false; 1201 } 1202 } 1203 /* restart tx timer(to verify that we will not exceed 1204 * AD_MAX_TX_IN_SECOND 1205 */ 1206 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1207 } 1208} 1209 1210/** 1211 * ad_periodic_machine - handle a port's periodic state machine 1212 * @port: the port we're looking at 1213 * 1214 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1215 */ 1216static void ad_periodic_machine(struct port *port) 1217{ 1218 periodic_states_t last_state; 1219 1220 /* keep current state machine state to compare later if it was changed */ 1221 last_state = port->sm_periodic_state; 1222 1223 /* check if port was reinitialized */ 1224 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1225 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1226 ) { 1227 port->sm_periodic_state = AD_NO_PERIODIC; 1228 } 1229 /* check if state machine should change state */ 1230 else if (port->sm_periodic_timer_counter) { 1231 /* check if periodic state machine expired */ 1232 if (!(--port->sm_periodic_timer_counter)) { 1233 /* if expired then do tx */ 1234 port->sm_periodic_state = AD_PERIODIC_TX; 1235 } else { 1236 /* If not expired, check if there is some new timeout 1237 * parameter from the partner state 1238 */ 1239 switch (port->sm_periodic_state) { 1240 case AD_FAST_PERIODIC: 1241 if (!(port->partner_oper.port_state 1242 & AD_STATE_LACP_TIMEOUT)) 1243 port->sm_periodic_state = AD_SLOW_PERIODIC; 1244 break; 1245 case AD_SLOW_PERIODIC: 1246 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1247 port->sm_periodic_timer_counter = 0; 1248 port->sm_periodic_state = AD_PERIODIC_TX; 1249 } 1250 break; 1251 default: 1252 break; 1253 } 1254 } 1255 } else { 1256 switch (port->sm_periodic_state) { 1257 case AD_NO_PERIODIC: 1258 port->sm_periodic_state = AD_FAST_PERIODIC; 1259 break; 1260 case AD_PERIODIC_TX: 1261 if (!(port->partner_oper.port_state & 1262 AD_STATE_LACP_TIMEOUT)) 1263 port->sm_periodic_state = AD_SLOW_PERIODIC; 1264 else 1265 port->sm_periodic_state = AD_FAST_PERIODIC; 1266 break; 1267 default: 1268 break; 1269 } 1270 } 1271 1272 /* check if the state machine was changed */ 1273 if (port->sm_periodic_state != last_state) { 1274 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1275 port->actor_port_number, last_state, 1276 port->sm_periodic_state); 1277 switch (port->sm_periodic_state) { 1278 case AD_NO_PERIODIC: 1279 port->sm_periodic_timer_counter = 0; 1280 break; 1281 case AD_FAST_PERIODIC: 1282 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1283 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1284 break; 1285 case AD_SLOW_PERIODIC: 1286 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1287 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1288 break; 1289 case AD_PERIODIC_TX: 1290 port->ntt = true; 1291 break; 1292 default: 1293 break; 1294 } 1295 } 1296} 1297 1298/** 1299 * ad_port_selection_logic - select aggregation groups 1300 * @port: the port we're looking at 1301 * @update_slave_arr: Does slave array need update? 1302 * 1303 * Select aggregation groups, and assign each port for it's aggregetor. The 1304 * selection logic is called in the inititalization (after all the handshkes), 1305 * and after every lacpdu receive (if selected is off). 1306 */ 1307static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1308{ 1309 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1310 struct port *last_port = NULL, *curr_port; 1311 struct list_head *iter; 1312 struct bonding *bond; 1313 struct slave *slave; 1314 int found = 0; 1315 1316 /* if the port is already Selected, do nothing */ 1317 if (port->sm_vars & AD_PORT_SELECTED) 1318 return; 1319 1320 bond = __get_bond_by_port(port); 1321 1322 /* if the port is connected to other aggregator, detach it */ 1323 if (port->aggregator) { 1324 /* detach the port from its former aggregator */ 1325 temp_aggregator = port->aggregator; 1326 for (curr_port = temp_aggregator->lag_ports; curr_port; 1327 last_port = curr_port, 1328 curr_port = curr_port->next_port_in_aggregator) { 1329 if (curr_port == port) { 1330 temp_aggregator->num_of_ports--; 1331 /* if it is the first port attached to the 1332 * aggregator 1333 */ 1334 if (!last_port) { 1335 temp_aggregator->lag_ports = 1336 port->next_port_in_aggregator; 1337 } else { 1338 /* not the first port attached to the 1339 * aggregator 1340 */ 1341 last_port->next_port_in_aggregator = 1342 port->next_port_in_aggregator; 1343 } 1344 1345 /* clear the port's relations to this 1346 * aggregator 1347 */ 1348 port->aggregator = NULL; 1349 port->next_port_in_aggregator = NULL; 1350 port->actor_port_aggregator_identifier = 0; 1351 1352 netdev_dbg(bond->dev, "Port %d left LAG %d\n", 1353 port->actor_port_number, 1354 temp_aggregator->aggregator_identifier); 1355 /* if the aggregator is empty, clear its 1356 * parameters, and set it ready to be attached 1357 */ 1358 if (!temp_aggregator->lag_ports) 1359 ad_clear_agg(temp_aggregator); 1360 break; 1361 } 1362 } 1363 if (!curr_port) { 1364 /* meaning: the port was related to an aggregator 1365 * but was not on the aggregator port list 1366 */ 1367 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1368 port->slave->bond->dev->name, 1369 port->actor_port_number, 1370 port->slave->dev->name, 1371 port->aggregator->aggregator_identifier); 1372 } 1373 } 1374 /* search on all aggregators for a suitable aggregator for this port */ 1375 bond_for_each_slave(bond, slave, iter) { 1376 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1377 1378 /* keep a free aggregator for later use(if needed) */ 1379 if (!aggregator->lag_ports) { 1380 if (!free_aggregator) 1381 free_aggregator = aggregator; 1382 continue; 1383 } 1384 /* check if current aggregator suits us */ 1385 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1386 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1387 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1388 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1389 ) && 1390 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1391 !aggregator->is_individual) /* but is not individual OR */ 1392 ) 1393 ) { 1394 /* attach to the founded aggregator */ 1395 port->aggregator = aggregator; 1396 port->actor_port_aggregator_identifier = 1397 port->aggregator->aggregator_identifier; 1398 port->next_port_in_aggregator = aggregator->lag_ports; 1399 port->aggregator->num_of_ports++; 1400 aggregator->lag_ports = port; 1401 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", 1402 port->actor_port_number, 1403 port->aggregator->aggregator_identifier); 1404 1405 /* mark this port as selected */ 1406 port->sm_vars |= AD_PORT_SELECTED; 1407 found = 1; 1408 break; 1409 } 1410 } 1411 1412 /* the port couldn't find an aggregator - attach it to a new 1413 * aggregator 1414 */ 1415 if (!found) { 1416 if (free_aggregator) { 1417 /* assign port a new aggregator */ 1418 port->aggregator = free_aggregator; 1419 port->actor_port_aggregator_identifier = 1420 port->aggregator->aggregator_identifier; 1421 1422 /* update the new aggregator's parameters 1423 * if port was responsed from the end-user 1424 */ 1425 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1426 /* if port is full duplex */ 1427 port->aggregator->is_individual = false; 1428 else 1429 port->aggregator->is_individual = true; 1430 1431 port->aggregator->actor_admin_aggregator_key = 1432 port->actor_admin_port_key; 1433 port->aggregator->actor_oper_aggregator_key = 1434 port->actor_oper_port_key; 1435 port->aggregator->partner_system = 1436 port->partner_oper.system; 1437 port->aggregator->partner_system_priority = 1438 port->partner_oper.system_priority; 1439 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1440 port->aggregator->receive_state = 1; 1441 port->aggregator->transmit_state = 1; 1442 port->aggregator->lag_ports = port; 1443 port->aggregator->num_of_ports++; 1444 1445 /* mark this port as selected */ 1446 port->sm_vars |= AD_PORT_SELECTED; 1447 1448 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", 1449 port->actor_port_number, 1450 port->aggregator->aggregator_identifier); 1451 } else { 1452 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", 1453 port->actor_port_number, port->slave->dev->name); 1454 } 1455 } 1456 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1457 * in all aggregator's ports, else set ready=FALSE in all 1458 * aggregator's ports 1459 */ 1460 __set_agg_ports_ready(port->aggregator, 1461 __agg_ports_are_ready(port->aggregator)); 1462 1463 aggregator = __get_first_agg(port); 1464 ad_agg_selection_logic(aggregator, update_slave_arr); 1465 1466 if (!port->aggregator->is_active) 1467 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1468} 1469 1470/* Decide if "agg" is a better choice for the new active aggregator that 1471 * the current best, according to the ad_select policy. 1472 */ 1473static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1474 struct aggregator *curr) 1475{ 1476 /* 0. If no best, select current. 1477 * 1478 * 1. If the current agg is not individual, and the best is 1479 * individual, select current. 1480 * 1481 * 2. If current agg is individual and the best is not, keep best. 1482 * 1483 * 3. Therefore, current and best are both individual or both not 1484 * individual, so: 1485 * 1486 * 3a. If current agg partner replied, and best agg partner did not, 1487 * select current. 1488 * 1489 * 3b. If current agg partner did not reply and best agg partner 1490 * did reply, keep best. 1491 * 1492 * 4. Therefore, current and best both have partner replies or 1493 * both do not, so perform selection policy: 1494 * 1495 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1496 * select by bandwidth. 1497 * 1498 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1499 */ 1500 if (!best) 1501 return curr; 1502 1503 if (!curr->is_individual && best->is_individual) 1504 return curr; 1505 1506 if (curr->is_individual && !best->is_individual) 1507 return best; 1508 1509 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1510 return curr; 1511 1512 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1513 return best; 1514 1515 switch (__get_agg_selection_mode(curr->lag_ports)) { 1516 case BOND_AD_COUNT: 1517 if (curr->num_of_ports > best->num_of_ports) 1518 return curr; 1519 1520 if (curr->num_of_ports < best->num_of_ports) 1521 return best; 1522 1523 /*FALLTHROUGH*/ 1524 case BOND_AD_STABLE: 1525 case BOND_AD_BANDWIDTH: 1526 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1527 return curr; 1528 1529 break; 1530 1531 default: 1532 net_warn_ratelimited("%s: Impossible agg select mode %d\n", 1533 curr->slave->bond->dev->name, 1534 __get_agg_selection_mode(curr->lag_ports)); 1535 break; 1536 } 1537 1538 return best; 1539} 1540 1541static int agg_device_up(const struct aggregator *agg) 1542{ 1543 struct port *port = agg->lag_ports; 1544 1545 if (!port) 1546 return 0; 1547 1548 return netif_running(port->slave->dev) && 1549 netif_carrier_ok(port->slave->dev); 1550} 1551 1552/** 1553 * ad_agg_selection_logic - select an aggregation group for a team 1554 * @aggregator: the aggregator we're looking at 1555 * @update_slave_arr: Does slave array need update? 1556 * 1557 * It is assumed that only one aggregator may be selected for a team. 1558 * 1559 * The logic of this function is to select the aggregator according to 1560 * the ad_select policy: 1561 * 1562 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1563 * it, and to reselect the active aggregator only if the previous 1564 * aggregator has no more ports related to it. 1565 * 1566 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1567 * bandwidth, and reselect whenever a link state change takes place or the 1568 * set of slaves in the bond changes. 1569 * 1570 * BOND_AD_COUNT: select the aggregator with largest number of ports 1571 * (slaves), and reselect whenever a link state change takes place or the 1572 * set of slaves in the bond changes. 1573 * 1574 * FIXME: this function MUST be called with the first agg in the bond, or 1575 * __get_active_agg() won't work correctly. This function should be better 1576 * called with the bond itself, and retrieve the first agg from it. 1577 */ 1578static void ad_agg_selection_logic(struct aggregator *agg, 1579 bool *update_slave_arr) 1580{ 1581 struct aggregator *best, *active, *origin; 1582 struct bonding *bond = agg->slave->bond; 1583 struct list_head *iter; 1584 struct slave *slave; 1585 struct port *port; 1586 1587 rcu_read_lock(); 1588 origin = agg; 1589 active = __get_active_agg(agg); 1590 best = (active && agg_device_up(active)) ? active : NULL; 1591 1592 bond_for_each_slave_rcu(bond, slave, iter) { 1593 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1594 1595 agg->is_active = 0; 1596 1597 if (agg->num_of_ports && agg_device_up(agg)) 1598 best = ad_agg_selection_test(best, agg); 1599 } 1600 1601 if (best && 1602 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1603 /* For the STABLE policy, don't replace the old active 1604 * aggregator if it's still active (it has an answering 1605 * partner) or if both the best and active don't have an 1606 * answering partner. 1607 */ 1608 if (active && active->lag_ports && 1609 active->lag_ports->is_enabled && 1610 (__agg_has_partner(active) || 1611 (!__agg_has_partner(active) && 1612 !__agg_has_partner(best)))) { 1613 if (!(!active->actor_oper_aggregator_key && 1614 best->actor_oper_aggregator_key)) { 1615 best = NULL; 1616 active->is_active = 1; 1617 } 1618 } 1619 } 1620 1621 if (best && (best == active)) { 1622 best = NULL; 1623 active->is_active = 1; 1624 } 1625 1626 /* if there is new best aggregator, activate it */ 1627 if (best) { 1628 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1629 best->aggregator_identifier, best->num_of_ports, 1630 best->actor_oper_aggregator_key, 1631 best->partner_oper_aggregator_key, 1632 best->is_individual, best->is_active); 1633 netdev_dbg(bond->dev, "best ports %p slave %p %s\n", 1634 best->lag_ports, best->slave, 1635 best->slave ? best->slave->dev->name : "NULL"); 1636 1637 bond_for_each_slave_rcu(bond, slave, iter) { 1638 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1639 1640 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1641 agg->aggregator_identifier, agg->num_of_ports, 1642 agg->actor_oper_aggregator_key, 1643 agg->partner_oper_aggregator_key, 1644 agg->is_individual, agg->is_active); 1645 } 1646 1647 /* check if any partner replys */ 1648 if (best->is_individual) { 1649 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1650 best->slave ? 1651 best->slave->bond->dev->name : "NULL"); 1652 } 1653 1654 best->is_active = 1; 1655 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", 1656 best->aggregator_identifier); 1657 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1658 best->aggregator_identifier, best->num_of_ports, 1659 best->actor_oper_aggregator_key, 1660 best->partner_oper_aggregator_key, 1661 best->is_individual, best->is_active); 1662 1663 /* disable the ports that were related to the former 1664 * active_aggregator 1665 */ 1666 if (active) { 1667 for (port = active->lag_ports; port; 1668 port = port->next_port_in_aggregator) { 1669 __disable_port(port); 1670 } 1671 } 1672 /* Slave array needs update. */ 1673 *update_slave_arr = true; 1674 } 1675 1676 /* if the selected aggregator is of join individuals 1677 * (partner_system is NULL), enable their ports 1678 */ 1679 active = __get_active_agg(origin); 1680 1681 if (active) { 1682 if (!__agg_has_partner(active)) { 1683 for (port = active->lag_ports; port; 1684 port = port->next_port_in_aggregator) { 1685 __enable_port(port); 1686 } 1687 } 1688 } 1689 1690 rcu_read_unlock(); 1691 1692 bond_3ad_set_carrier(bond); 1693} 1694 1695/** 1696 * ad_clear_agg - clear a given aggregator's parameters 1697 * @aggregator: the aggregator we're looking at 1698 */ 1699static void ad_clear_agg(struct aggregator *aggregator) 1700{ 1701 if (aggregator) { 1702 aggregator->is_individual = false; 1703 aggregator->actor_admin_aggregator_key = 0; 1704 aggregator->actor_oper_aggregator_key = 0; 1705 aggregator->partner_system = null_mac_addr; 1706 aggregator->partner_system_priority = 0; 1707 aggregator->partner_oper_aggregator_key = 0; 1708 aggregator->receive_state = 0; 1709 aggregator->transmit_state = 0; 1710 aggregator->lag_ports = NULL; 1711 aggregator->is_active = 0; 1712 aggregator->num_of_ports = 0; 1713 pr_debug("LAG %d was cleared\n", 1714 aggregator->aggregator_identifier); 1715 } 1716} 1717 1718/** 1719 * ad_initialize_agg - initialize a given aggregator's parameters 1720 * @aggregator: the aggregator we're looking at 1721 */ 1722static void ad_initialize_agg(struct aggregator *aggregator) 1723{ 1724 if (aggregator) { 1725 ad_clear_agg(aggregator); 1726 1727 aggregator->aggregator_mac_address = null_mac_addr; 1728 aggregator->aggregator_identifier = 0; 1729 aggregator->slave = NULL; 1730 } 1731} 1732 1733/** 1734 * ad_initialize_port - initialize a given port's parameters 1735 * @aggregator: the aggregator we're looking at 1736 * @lacp_fast: boolean. whether fast periodic should be used 1737 */ 1738static void ad_initialize_port(struct port *port, int lacp_fast) 1739{ 1740 static const struct port_params tmpl = { 1741 .system_priority = 0xffff, 1742 .key = 1, 1743 .port_number = 1, 1744 .port_priority = 0xff, 1745 .port_state = 1, 1746 }; 1747 static const struct lacpdu lacpdu = { 1748 .subtype = 0x01, 1749 .version_number = 0x01, 1750 .tlv_type_actor_info = 0x01, 1751 .actor_information_length = 0x14, 1752 .tlv_type_partner_info = 0x02, 1753 .partner_information_length = 0x14, 1754 .tlv_type_collector_info = 0x03, 1755 .collector_information_length = 0x10, 1756 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1757 }; 1758 1759 if (port) { 1760 port->actor_port_priority = 0xff; 1761 port->actor_port_aggregator_identifier = 0; 1762 port->ntt = false; 1763 port->actor_admin_port_state = AD_STATE_AGGREGATION | 1764 AD_STATE_LACP_ACTIVITY; 1765 port->actor_oper_port_state = AD_STATE_AGGREGATION | 1766 AD_STATE_LACP_ACTIVITY; 1767 1768 if (lacp_fast) 1769 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1770 1771 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1772 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1773 1774 port->is_enabled = true; 1775 /* private parameters */ 1776 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1777 port->sm_rx_state = 0; 1778 port->sm_rx_timer_counter = 0; 1779 port->sm_periodic_state = 0; 1780 port->sm_periodic_timer_counter = 0; 1781 port->sm_mux_state = 0; 1782 port->sm_mux_timer_counter = 0; 1783 port->sm_tx_state = 0; 1784 port->aggregator = NULL; 1785 port->next_port_in_aggregator = NULL; 1786 port->transaction_id = 0; 1787 1788 port->sm_churn_actor_timer_counter = 0; 1789 port->sm_churn_actor_state = 0; 1790 port->churn_actor_count = 0; 1791 port->sm_churn_partner_timer_counter = 0; 1792 port->sm_churn_partner_state = 0; 1793 port->churn_partner_count = 0; 1794 1795 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1796 } 1797} 1798 1799/** 1800 * ad_enable_collecting_distributing - enable a port's transmit/receive 1801 * @port: the port we're looking at 1802 * @update_slave_arr: Does slave array need update? 1803 * 1804 * Enable @port if it's in an active aggregator 1805 */ 1806static void ad_enable_collecting_distributing(struct port *port, 1807 bool *update_slave_arr) 1808{ 1809 if (port->aggregator->is_active) { 1810 pr_debug("Enabling port %d(LAG %d)\n", 1811 port->actor_port_number, 1812 port->aggregator->aggregator_identifier); 1813 __enable_port(port); 1814 /* Slave array needs update */ 1815 *update_slave_arr = true; 1816 } 1817} 1818 1819/** 1820 * ad_disable_collecting_distributing - disable a port's transmit/receive 1821 * @port: the port we're looking at 1822 * @update_slave_arr: Does slave array need update? 1823 */ 1824static void ad_disable_collecting_distributing(struct port *port, 1825 bool *update_slave_arr) 1826{ 1827 if (port->aggregator && 1828 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1829 &(null_mac_addr))) { 1830 pr_debug("Disabling port %d(LAG %d)\n", 1831 port->actor_port_number, 1832 port->aggregator->aggregator_identifier); 1833 __disable_port(port); 1834 /* Slave array needs an update */ 1835 *update_slave_arr = true; 1836 } 1837} 1838 1839/** 1840 * ad_marker_info_received - handle receive of a Marker information frame 1841 * @marker_info: Marker info received 1842 * @port: the port we're looking at 1843 */ 1844static void ad_marker_info_received(struct bond_marker *marker_info, 1845 struct port *port) 1846{ 1847 struct bond_marker marker; 1848 1849 /* copy the received marker data to the response marker */ 1850 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1851 /* change the marker subtype to marker response */ 1852 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1853 1854 /* send the marker response */ 1855 if (ad_marker_send(port, &marker) >= 0) { 1856 pr_debug("Sent Marker Response on port %d\n", 1857 port->actor_port_number); 1858 } 1859} 1860 1861/** 1862 * ad_marker_response_received - handle receive of a marker response frame 1863 * @marker: marker PDU received 1864 * @port: the port we're looking at 1865 * 1866 * This function does nothing since we decided not to implement send and handle 1867 * response for marker PDU's, in this stage, but only to respond to marker 1868 * information. 1869 */ 1870static void ad_marker_response_received(struct bond_marker *marker, 1871 struct port *port) 1872{ 1873 marker = NULL; 1874 port = NULL; 1875 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1876} 1877 1878/* ========= AD exported functions to the main bonding code ========= */ 1879 1880/* Check aggregators status in team every T seconds */ 1881#define AD_AGGREGATOR_SELECTION_TIMER 8 1882 1883/** 1884 * bond_3ad_initiate_agg_selection - initate aggregator selection 1885 * @bond: bonding struct 1886 * 1887 * Set the aggregation selection timer, to initiate an agg selection in 1888 * the very near future. Called during first initialization, and during 1889 * any down to up transitions of the bond. 1890 */ 1891void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1892{ 1893 BOND_AD_INFO(bond).agg_select_timer = timeout; 1894} 1895 1896/** 1897 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1898 * @bond: bonding struct to work on 1899 * @tick_resolution: tick duration (millisecond resolution) 1900 * 1901 * Can be called only after the mac address of the bond is set. 1902 */ 1903void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1904{ 1905 /* check that the bond is not initialized yet */ 1906 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1907 bond->dev->dev_addr)) { 1908 1909 BOND_AD_INFO(bond).aggregator_identifier = 0; 1910 1911 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; 1912 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); 1913 1914 /* initialize how many times this module is called in one 1915 * second (should be about every 100ms) 1916 */ 1917 ad_ticks_per_sec = tick_resolution; 1918 1919 bond_3ad_initiate_agg_selection(bond, 1920 AD_AGGREGATOR_SELECTION_TIMER * 1921 ad_ticks_per_sec); 1922 } 1923} 1924 1925/** 1926 * bond_3ad_bind_slave - initialize a slave's port 1927 * @slave: slave struct to work on 1928 * 1929 * Returns: 0 on success 1930 * < 0 on error 1931 */ 1932void bond_3ad_bind_slave(struct slave *slave) 1933{ 1934 struct bonding *bond = bond_get_bond_by_slave(slave); 1935 struct port *port; 1936 struct aggregator *aggregator; 1937 1938 /* check that the slave has not been initialized yet. */ 1939 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 1940 1941 /* port initialization */ 1942 port = &(SLAVE_AD_INFO(slave)->port); 1943 1944 ad_initialize_port(port, bond->params.lacp_fast); 1945 1946 port->slave = slave; 1947 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 1948 /* key is determined according to the link speed, duplex and user key(which 1949 * is yet not supported) 1950 */ 1951 port->actor_admin_port_key = 0; 1952 port->actor_admin_port_key |= __get_duplex(port); 1953 port->actor_admin_port_key |= (__get_link_speed(port) << 1); 1954 port->actor_oper_port_key = port->actor_admin_port_key; 1955 /* if the port is not full duplex, then the port should be not 1956 * lacp Enabled 1957 */ 1958 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1959 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1960 /* actor system is the bond's system */ 1961 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 1962 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 1963 * lacpdu's are sent in one second) 1964 */ 1965 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1966 1967 __disable_port(port); 1968 1969 /* aggregator initialization */ 1970 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1971 1972 ad_initialize_agg(aggregator); 1973 1974 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 1975 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 1976 aggregator->slave = slave; 1977 aggregator->is_active = 0; 1978 aggregator->num_of_ports = 0; 1979 } 1980} 1981 1982/** 1983 * bond_3ad_unbind_slave - deinitialize a slave's port 1984 * @slave: slave struct to work on 1985 * 1986 * Search for the aggregator that is related to this port, remove the 1987 * aggregator and assign another aggregator for other port related to it 1988 * (if any), and remove the port. 1989 */ 1990void bond_3ad_unbind_slave(struct slave *slave) 1991{ 1992 struct port *port, *prev_port, *temp_port; 1993 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 1994 int select_new_active_agg = 0; 1995 struct bonding *bond = slave->bond; 1996 struct slave *slave_iter; 1997 struct list_head *iter; 1998 bool dummy_slave_update; /* Ignore this value as caller updates array */ 1999 2000 /* Sync against bond_3ad_state_machine_handler() */ 2001 spin_lock_bh(&bond->mode_lock); 2002 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2003 port = &(SLAVE_AD_INFO(slave)->port); 2004 2005 /* if slave is null, the whole port is not initialized */ 2006 if (!port->slave) { 2007 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", 2008 slave->dev->name); 2009 goto out; 2010 } 2011 2012 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", 2013 aggregator->aggregator_identifier); 2014 2015 /* Tell the partner that this port is not suitable for aggregation */ 2016 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 2017 __update_lacpdu_from_port(port); 2018 ad_lacpdu_send(port); 2019 2020 /* check if this aggregator is occupied */ 2021 if (aggregator->lag_ports) { 2022 /* check if there are other ports related to this aggregator 2023 * except the port related to this slave(thats ensure us that 2024 * there is a reason to search for new aggregator, and that we 2025 * will find one 2026 */ 2027 if ((aggregator->lag_ports != port) || 2028 (aggregator->lag_ports->next_port_in_aggregator)) { 2029 /* find new aggregator for the related port(s) */ 2030 bond_for_each_slave(bond, slave_iter, iter) { 2031 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2032 /* if the new aggregator is empty, or it is 2033 * connected to our port only 2034 */ 2035 if (!new_aggregator->lag_ports || 2036 ((new_aggregator->lag_ports == port) && 2037 !new_aggregator->lag_ports->next_port_in_aggregator)) 2038 break; 2039 } 2040 if (!slave_iter) 2041 new_aggregator = NULL; 2042 2043 /* if new aggregator found, copy the aggregator's 2044 * parameters and connect the related lag_ports to the 2045 * new aggregator 2046 */ 2047 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2048 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2049 aggregator->aggregator_identifier, 2050 new_aggregator->aggregator_identifier); 2051 2052 if ((new_aggregator->lag_ports == port) && 2053 new_aggregator->is_active) { 2054 netdev_info(bond->dev, "Removing an active aggregator\n"); 2055 select_new_active_agg = 1; 2056 } 2057 2058 new_aggregator->is_individual = aggregator->is_individual; 2059 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2060 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2061 new_aggregator->partner_system = aggregator->partner_system; 2062 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2063 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2064 new_aggregator->receive_state = aggregator->receive_state; 2065 new_aggregator->transmit_state = aggregator->transmit_state; 2066 new_aggregator->lag_ports = aggregator->lag_ports; 2067 new_aggregator->is_active = aggregator->is_active; 2068 new_aggregator->num_of_ports = aggregator->num_of_ports; 2069 2070 /* update the information that is written on 2071 * the ports about the aggregator 2072 */ 2073 for (temp_port = aggregator->lag_ports; temp_port; 2074 temp_port = temp_port->next_port_in_aggregator) { 2075 temp_port->aggregator = new_aggregator; 2076 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2077 } 2078 2079 ad_clear_agg(aggregator); 2080 2081 if (select_new_active_agg) 2082 ad_agg_selection_logic(__get_first_agg(port), 2083 &dummy_slave_update); 2084 } else { 2085 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2086 } 2087 } else { 2088 /* in case that the only port related to this 2089 * aggregator is the one we want to remove 2090 */ 2091 select_new_active_agg = aggregator->is_active; 2092 ad_clear_agg(aggregator); 2093 if (select_new_active_agg) { 2094 netdev_info(bond->dev, "Removing an active aggregator\n"); 2095 /* select new active aggregator */ 2096 temp_aggregator = __get_first_agg(port); 2097 if (temp_aggregator) 2098 ad_agg_selection_logic(temp_aggregator, 2099 &dummy_slave_update); 2100 } 2101 } 2102 } 2103 2104 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); 2105 2106 /* find the aggregator that this port is connected to */ 2107 bond_for_each_slave(bond, slave_iter, iter) { 2108 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2109 prev_port = NULL; 2110 /* search the port in the aggregator's related ports */ 2111 for (temp_port = temp_aggregator->lag_ports; temp_port; 2112 prev_port = temp_port, 2113 temp_port = temp_port->next_port_in_aggregator) { 2114 if (temp_port == port) { 2115 /* the aggregator found - detach the port from 2116 * this aggregator 2117 */ 2118 if (prev_port) 2119 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2120 else 2121 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2122 temp_aggregator->num_of_ports--; 2123 if (temp_aggregator->num_of_ports == 0) { 2124 select_new_active_agg = temp_aggregator->is_active; 2125 ad_clear_agg(temp_aggregator); 2126 if (select_new_active_agg) { 2127 netdev_info(bond->dev, "Removing an active aggregator\n"); 2128 /* select new active aggregator */ 2129 ad_agg_selection_logic(__get_first_agg(port), 2130 &dummy_slave_update); 2131 } 2132 } 2133 break; 2134 } 2135 } 2136 } 2137 port->slave = NULL; 2138 2139out: 2140 spin_unlock_bh(&bond->mode_lock); 2141} 2142 2143/** 2144 * bond_3ad_state_machine_handler - handle state machines timeout 2145 * @bond: bonding struct to work on 2146 * 2147 * The state machine handling concept in this module is to check every tick 2148 * which state machine should operate any function. The execution order is 2149 * round robin, so when we have an interaction between state machines, the 2150 * reply of one to each other might be delayed until next tick. 2151 * 2152 * This function also complete the initialization when the agg_select_timer 2153 * times out, and it selects an aggregator for the ports that are yet not 2154 * related to any aggregator, and selects the active aggregator for a bond. 2155 */ 2156void bond_3ad_state_machine_handler(struct work_struct *work) 2157{ 2158 struct bonding *bond = container_of(work, struct bonding, 2159 ad_work.work); 2160 struct aggregator *aggregator; 2161 struct list_head *iter; 2162 struct slave *slave; 2163 struct port *port; 2164 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2165 bool update_slave_arr = false; 2166 2167 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2168 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2169 * concurrently due to incoming LACPDU as well. 2170 */ 2171 spin_lock_bh(&bond->mode_lock); 2172 rcu_read_lock(); 2173 2174 /* check if there are any slaves */ 2175 if (!bond_has_slaves(bond)) 2176 goto re_arm; 2177 2178 /* check if agg_select_timer timer after initialize is timed out */ 2179 if (BOND_AD_INFO(bond).agg_select_timer && 2180 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2181 slave = bond_first_slave_rcu(bond); 2182 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2183 2184 /* select the active aggregator for the bond */ 2185 if (port) { 2186 if (!port->slave) { 2187 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2188 bond->dev->name); 2189 goto re_arm; 2190 } 2191 2192 aggregator = __get_first_agg(port); 2193 ad_agg_selection_logic(aggregator, &update_slave_arr); 2194 } 2195 bond_3ad_set_carrier(bond); 2196 } 2197 2198 /* for each port run the state machines */ 2199 bond_for_each_slave_rcu(bond, slave, iter) { 2200 port = &(SLAVE_AD_INFO(slave)->port); 2201 if (!port->slave) { 2202 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2203 bond->dev->name); 2204 goto re_arm; 2205 } 2206 2207 ad_rx_machine(NULL, port); 2208 ad_periodic_machine(port); 2209 ad_port_selection_logic(port, &update_slave_arr); 2210 ad_mux_machine(port, &update_slave_arr); 2211 ad_tx_machine(port); 2212 ad_churn_machine(port); 2213 2214 /* turn off the BEGIN bit, since we already handled it */ 2215 if (port->sm_vars & AD_PORT_BEGIN) 2216 port->sm_vars &= ~AD_PORT_BEGIN; 2217 } 2218 2219re_arm: 2220 bond_for_each_slave_rcu(bond, slave, iter) { 2221 if (slave->should_notify) { 2222 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2223 break; 2224 } 2225 } 2226 rcu_read_unlock(); 2227 spin_unlock_bh(&bond->mode_lock); 2228 2229 if (update_slave_arr) 2230 bond_slave_arr_work_rearm(bond, 0); 2231 2232 if (should_notify_rtnl && rtnl_trylock()) { 2233 bond_slave_state_notify(bond); 2234 rtnl_unlock(); 2235 } 2236 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2237} 2238 2239/** 2240 * bond_3ad_rx_indication - handle a received frame 2241 * @lacpdu: received lacpdu 2242 * @slave: slave struct to work on 2243 * @length: length of the data received 2244 * 2245 * It is assumed that frames that were sent on this NIC don't returned as new 2246 * received frames (loopback). Since only the payload is given to this 2247 * function, it check for loopback. 2248 */ 2249static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, 2250 u16 length) 2251{ 2252 struct port *port; 2253 int ret = RX_HANDLER_ANOTHER; 2254 2255 if (length >= sizeof(struct lacpdu)) { 2256 2257 port = &(SLAVE_AD_INFO(slave)->port); 2258 2259 if (!port->slave) { 2260 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2261 slave->dev->name, slave->bond->dev->name); 2262 return ret; 2263 } 2264 2265 switch (lacpdu->subtype) { 2266 case AD_TYPE_LACPDU: 2267 ret = RX_HANDLER_CONSUMED; 2268 netdev_dbg(slave->bond->dev, 2269 "Received LACPDU on port %d slave %s\n", 2270 port->actor_port_number, 2271 slave->dev->name); 2272 /* Protect against concurrent state machines */ 2273 spin_lock(&slave->bond->mode_lock); 2274 ad_rx_machine(lacpdu, port); 2275 spin_unlock(&slave->bond->mode_lock); 2276 break; 2277 2278 case AD_TYPE_MARKER: 2279 ret = RX_HANDLER_CONSUMED; 2280 /* No need to convert fields to Little Endian since we 2281 * don't use the marker's fields. 2282 */ 2283 2284 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2285 case AD_MARKER_INFORMATION_SUBTYPE: 2286 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", 2287 port->actor_port_number); 2288 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2289 break; 2290 2291 case AD_MARKER_RESPONSE_SUBTYPE: 2292 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", 2293 port->actor_port_number); 2294 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2295 break; 2296 2297 default: 2298 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", 2299 port->actor_port_number); 2300 } 2301 } 2302 } 2303 return ret; 2304} 2305 2306/** 2307 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication 2308 * @slave: slave struct to work on 2309 * 2310 * Handle reselection of aggregator (if needed) for this port. 2311 */ 2312void bond_3ad_adapter_speed_changed(struct slave *slave) 2313{ 2314 struct port *port; 2315 2316 port = &(SLAVE_AD_INFO(slave)->port); 2317 2318 /* if slave is null, the whole port is not initialized */ 2319 if (!port->slave) { 2320 netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n", 2321 slave->dev->name); 2322 return; 2323 } 2324 2325 spin_lock_bh(&slave->bond->mode_lock); 2326 2327 port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS; 2328 port->actor_admin_port_key |= __get_link_speed(port) << 1; 2329 port->actor_oper_port_key = port->actor_admin_port_key; 2330 netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number); 2331 /* there is no need to reselect a new aggregator, just signal the 2332 * state machines to reinitialize 2333 */ 2334 port->sm_vars |= AD_PORT_BEGIN; 2335 2336 spin_unlock_bh(&slave->bond->mode_lock); 2337} 2338 2339/** 2340 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication 2341 * @slave: slave struct to work on 2342 * 2343 * Handle reselection of aggregator (if needed) for this port. 2344 */ 2345void bond_3ad_adapter_duplex_changed(struct slave *slave) 2346{ 2347 struct port *port; 2348 2349 port = &(SLAVE_AD_INFO(slave)->port); 2350 2351 /* if slave is null, the whole port is not initialized */ 2352 if (!port->slave) { 2353 netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n", 2354 slave->dev->name); 2355 return; 2356 } 2357 2358 spin_lock_bh(&slave->bond->mode_lock); 2359 2360 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS; 2361 port->actor_admin_port_key |= __get_duplex(port); 2362 port->actor_oper_port_key = port->actor_admin_port_key; 2363 netdev_dbg(slave->bond->dev, "Port %d slave %s changed duplex\n", 2364 port->actor_port_number, slave->dev->name); 2365 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 2366 port->sm_vars |= AD_PORT_LACP_ENABLED; 2367 /* there is no need to reselect a new aggregator, just signal the 2368 * state machines to reinitialize 2369 */ 2370 port->sm_vars |= AD_PORT_BEGIN; 2371 2372 spin_unlock_bh(&slave->bond->mode_lock); 2373} 2374 2375/** 2376 * bond_3ad_handle_link_change - handle a slave's link status change indication 2377 * @slave: slave struct to work on 2378 * @status: whether the link is now up or down 2379 * 2380 * Handle reselection of aggregator (if needed) for this port. 2381 */ 2382void bond_3ad_handle_link_change(struct slave *slave, char link) 2383{ 2384 struct port *port; 2385 2386 port = &(SLAVE_AD_INFO(slave)->port); 2387 2388 /* if slave is null, the whole port is not initialized */ 2389 if (!port->slave) { 2390 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", 2391 slave->dev->name); 2392 return; 2393 } 2394 2395 spin_lock_bh(&slave->bond->mode_lock); 2396 /* on link down we are zeroing duplex and speed since 2397 * some of the adaptors(ce1000.lan) report full duplex/speed 2398 * instead of N/A(duplex) / 0(speed). 2399 * 2400 * on link up we are forcing recheck on the duplex and speed since 2401 * some of he adaptors(ce1000.lan) report. 2402 */ 2403 port->actor_admin_port_key &= ~(AD_DUPLEX_KEY_MASKS|AD_SPEED_KEY_MASKS); 2404 if (link == BOND_LINK_UP) { 2405 port->is_enabled = true; 2406 port->actor_admin_port_key |= 2407 (__get_link_speed(port) << 1) | __get_duplex(port); 2408 if (port->actor_admin_port_key & AD_DUPLEX_KEY_MASKS) 2409 port->sm_vars |= AD_PORT_LACP_ENABLED; 2410 } else { 2411 /* link has failed */ 2412 port->is_enabled = false; 2413 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2414 } 2415 port->actor_oper_port_key = port->actor_admin_port_key; 2416 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", 2417 port->actor_port_number, 2418 link == BOND_LINK_UP ? "UP" : "DOWN"); 2419 /* there is no need to reselect a new aggregator, just signal the 2420 * state machines to reinitialize 2421 */ 2422 port->sm_vars |= AD_PORT_BEGIN; 2423 2424 spin_unlock_bh(&slave->bond->mode_lock); 2425 2426 /* RTNL is held and mode_lock is released so it's safe 2427 * to update slave_array here. 2428 */ 2429 bond_update_slave_arr(slave->bond, NULL); 2430} 2431 2432/** 2433 * bond_3ad_set_carrier - set link state for bonding master 2434 * @bond - bonding structure 2435 * 2436 * if we have an active aggregator, we're up, if not, we're down. 2437 * Presumes that we cannot have an active aggregator if there are 2438 * no slaves with link up. 2439 * 2440 * This behavior complies with IEEE 802.3 section 43.3.9. 2441 * 2442 * Called by bond_set_carrier(). Return zero if carrier state does not 2443 * change, nonzero if it does. 2444 */ 2445int bond_3ad_set_carrier(struct bonding *bond) 2446{ 2447 struct aggregator *active; 2448 struct slave *first_slave; 2449 int ret = 1; 2450 2451 rcu_read_lock(); 2452 first_slave = bond_first_slave_rcu(bond); 2453 if (!first_slave) { 2454 ret = 0; 2455 goto out; 2456 } 2457 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2458 if (active) { 2459 /* are enough slaves available to consider link up? */ 2460 if (active->num_of_ports < bond->params.min_links) { 2461 if (netif_carrier_ok(bond->dev)) { 2462 netif_carrier_off(bond->dev); 2463 goto out; 2464 } 2465 } else if (!netif_carrier_ok(bond->dev)) { 2466 netif_carrier_on(bond->dev); 2467 goto out; 2468 } 2469 } else if (netif_carrier_ok(bond->dev)) { 2470 netif_carrier_off(bond->dev); 2471 } 2472out: 2473 rcu_read_unlock(); 2474 return ret; 2475} 2476 2477/** 2478 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2479 * @bond: bonding struct to work on 2480 * @ad_info: ad_info struct to fill with the bond's info 2481 * 2482 * Returns: 0 on success 2483 * < 0 on error 2484 */ 2485int __bond_3ad_get_active_agg_info(struct bonding *bond, 2486 struct ad_info *ad_info) 2487{ 2488 struct aggregator *aggregator = NULL; 2489 struct list_head *iter; 2490 struct slave *slave; 2491 struct port *port; 2492 2493 bond_for_each_slave_rcu(bond, slave, iter) { 2494 port = &(SLAVE_AD_INFO(slave)->port); 2495 if (port->aggregator && port->aggregator->is_active) { 2496 aggregator = port->aggregator; 2497 break; 2498 } 2499 } 2500 2501 if (!aggregator) 2502 return -1; 2503 2504 ad_info->aggregator_id = aggregator->aggregator_identifier; 2505 ad_info->ports = aggregator->num_of_ports; 2506 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2507 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2508 ether_addr_copy(ad_info->partner_system, 2509 aggregator->partner_system.mac_addr_value); 2510 return 0; 2511} 2512 2513int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2514{ 2515 int ret; 2516 2517 rcu_read_lock(); 2518 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2519 rcu_read_unlock(); 2520 2521 return ret; 2522} 2523 2524int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2525 struct slave *slave) 2526{ 2527 struct lacpdu *lacpdu, _lacpdu; 2528 2529 if (skb->protocol != PKT_TYPE_LACPDU) 2530 return RX_HANDLER_ANOTHER; 2531 2532 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2533 return RX_HANDLER_ANOTHER; 2534 2535 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2536 if (!lacpdu) 2537 return RX_HANDLER_ANOTHER; 2538 2539 return bond_3ad_rx_indication(lacpdu, slave, skb->len); 2540} 2541 2542/** 2543 * bond_3ad_update_lacp_rate - change the lacp rate 2544 * @bond - bonding struct 2545 * 2546 * When modify lacp_rate parameter via sysfs, 2547 * update actor_oper_port_state of each port. 2548 * 2549 * Hold bond->mode_lock, 2550 * so we can modify port->actor_oper_port_state, 2551 * no matter bond is up or down. 2552 */ 2553void bond_3ad_update_lacp_rate(struct bonding *bond) 2554{ 2555 struct port *port = NULL; 2556 struct list_head *iter; 2557 struct slave *slave; 2558 int lacp_fast; 2559 2560 lacp_fast = bond->params.lacp_fast; 2561 spin_lock_bh(&bond->mode_lock); 2562 bond_for_each_slave(bond, slave, iter) { 2563 port = &(SLAVE_AD_INFO(slave)->port); 2564 if (lacp_fast) 2565 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2566 else 2567 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2568 } 2569 spin_unlock_bh(&bond->mode_lock); 2570} 2571