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 802.3ad standard) 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 74 // Port Key definitions 75 // key is determined according to the link speed, duplex and 76 // user key(which is yet not supported) 77 // ------------------------------------------------------------ 78 // Port key : | User key | Speed |Duplex| 79 // ------------------------------------------------------------ 80 // 16 6 1 0 81 #define AD_DUPLEX_KEY_BITS 0x1 82 #define AD_SPEED_KEY_BITS 0x3E 83 #define AD_USER_KEY_BITS 0xFFC0 84 85 //dalloun 86 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 87 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 88 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 89 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 90 #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 91 //endalloun 92 93 // compare MAC addresses 94 #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN) 95 96 static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; 97 static u16 ad_ticks_per_sec; 98 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 99 100 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; 101 102 // ================= main 802.3ad protocol functions ================== 103 static int ad_lacpdu_send(struct port *port); 104 static int ad_marker_send(struct port *port, struct bond_marker *marker); 105 static void ad_mux_machine(struct port *port); 106 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 107 static void ad_tx_machine(struct port *port); 108 static void ad_periodic_machine(struct port *port); 109 static void ad_port_selection_logic(struct port *port); 110 static void ad_agg_selection_logic(struct aggregator *aggregator); 111 static void ad_clear_agg(struct aggregator *aggregator); 112 static void ad_initialize_agg(struct aggregator *aggregator); 113 static void ad_initialize_port(struct port *port, int lacp_fast); 114 static void ad_enable_collecting_distributing(struct port *port); 115 static void ad_disable_collecting_distributing(struct port *port); 116 static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port); 117 static void ad_marker_response_received(struct bond_marker *marker, struct port *port); 118 119 120 ///////////////////////////////////////////////////////////////////////////////// 121 // ================= api to bonding and kernel code ================== 122 ///////////////////////////////////////////////////////////////////////////////// 123 124 /** 125 * __get_bond_by_port - get the port's bonding struct 126 * @port: the port we're looking at 127 * 128 * Return @port's bonding struct, or %NULL if it can't be found. 129 */ 130 static inline struct bonding *__get_bond_by_port(struct port *port) 131 { 132 if (port->slave == NULL) 133 return NULL; 134 135 return bond_get_bond_by_slave(port->slave); 136 } 137 138 /** 139 * __get_first_agg - get the first aggregator in the bond 140 * @bond: the bond we're looking at 141 * 142 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 143 * found. 144 */ 145 static inline struct aggregator *__get_first_agg(struct port *port) 146 { 147 struct bonding *bond = __get_bond_by_port(port); 148 struct slave *first_slave; 149 150 /* If there's no bond for this port, or bond has no slaves */ 151 if (bond == NULL) 152 return NULL; 153 rcu_read_lock(); 154 first_slave = bond_first_slave_rcu(bond); 155 rcu_read_unlock(); 156 return first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL; 157 } 158 159 /* 160 * __agg_has_partner 161 * 162 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 163 * address for the partner). Return 0 if not. 164 */ 165 static inline int __agg_has_partner(struct aggregator *agg) 166 { 167 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 168 } 169 170 /** 171 * __disable_port - disable the port's slave 172 * @port: the port we're looking at 173 * 174 */ 175 static inline void __disable_port(struct port *port) 176 { 177 bond_set_slave_inactive_flags(port->slave); 178 } 179 180 /** 181 * __enable_port - enable the port's slave, if it's up 182 * @port: the port we're looking at 183 * 184 */ 185 static inline void __enable_port(struct port *port) 186 { 187 struct slave *slave = port->slave; 188 189 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) 190 bond_set_slave_active_flags(slave); 191 } 192 193 /** 194 * __port_is_enabled - check if the port's slave is in active state 195 * @port: the port we're looking at 196 * 197 */ 198 static inline int __port_is_enabled(struct port *port) 199 { 200 return bond_is_active_slave(port->slave); 201 } 202 203 /** 204 * __get_agg_selection_mode - get the aggregator selection mode 205 * @port: the port we're looking at 206 * 207 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 208 */ 209 static inline u32 __get_agg_selection_mode(struct port *port) 210 { 211 struct bonding *bond = __get_bond_by_port(port); 212 213 if (bond == NULL) 214 return BOND_AD_STABLE; 215 216 return bond->params.ad_select; 217 } 218 219 /** 220 * __check_agg_selection_timer - check if the selection timer has expired 221 * @port: the port we're looking at 222 * 223 */ 224 static inline int __check_agg_selection_timer(struct port *port) 225 { 226 struct bonding *bond = __get_bond_by_port(port); 227 228 if (bond == NULL) 229 return 0; 230 231 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 232 } 233 234 /** 235 * __get_state_machine_lock - lock the port's state machines 236 * @port: the port we're looking at 237 * 238 */ 239 static inline void __get_state_machine_lock(struct port *port) 240 { 241 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); 242 } 243 244 /** 245 * __release_state_machine_lock - unlock the port's state machines 246 * @port: the port we're looking at 247 * 248 */ 249 static inline void __release_state_machine_lock(struct port *port) 250 { 251 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); 252 } 253 254 /** 255 * __get_link_speed - get a port's speed 256 * @port: the port we're looking at 257 * 258 * Return @port's speed in 802.3ad bitmask format. i.e. one of: 259 * 0, 260 * %AD_LINK_SPEED_BITMASK_10MBPS, 261 * %AD_LINK_SPEED_BITMASK_100MBPS, 262 * %AD_LINK_SPEED_BITMASK_1000MBPS, 263 * %AD_LINK_SPEED_BITMASK_10000MBPS 264 */ 265 static u16 __get_link_speed(struct port *port) 266 { 267 struct slave *slave = port->slave; 268 u16 speed; 269 270 /* this if covers only a special case: when the configuration starts with 271 * link down, it sets the speed to 0. 272 * This is done in spite of the fact that the e100 driver reports 0 to be 273 * compatible with MVT in the future.*/ 274 if (slave->link != BOND_LINK_UP) 275 speed = 0; 276 else { 277 switch (slave->speed) { 278 case SPEED_10: 279 speed = AD_LINK_SPEED_BITMASK_10MBPS; 280 break; 281 282 case SPEED_100: 283 speed = AD_LINK_SPEED_BITMASK_100MBPS; 284 break; 285 286 case SPEED_1000: 287 speed = AD_LINK_SPEED_BITMASK_1000MBPS; 288 break; 289 290 case SPEED_10000: 291 speed = AD_LINK_SPEED_BITMASK_10000MBPS; 292 break; 293 294 default: 295 speed = 0; // unknown speed value from ethtool. shouldn't happen 296 break; 297 } 298 } 299 300 pr_debug("Port %d Received link speed %d update from adapter\n", 301 port->actor_port_number, speed); 302 return speed; 303 } 304 305 /** 306 * __get_duplex - get a port's duplex 307 * @port: the port we're looking at 308 * 309 * Return @port's duplex in 802.3ad bitmask format. i.e.: 310 * 0x01 if in full duplex 311 * 0x00 otherwise 312 */ 313 static u8 __get_duplex(struct port *port) 314 { 315 struct slave *slave = port->slave; 316 317 u8 retval; 318 319 // handling a special case: when the configuration starts with 320 // link down, it sets the duplex to 0. 321 if (slave->link != BOND_LINK_UP) 322 retval = 0x0; 323 else { 324 switch (slave->duplex) { 325 case DUPLEX_FULL: 326 retval = 0x1; 327 pr_debug("Port %d Received status full duplex update from adapter\n", 328 port->actor_port_number); 329 break; 330 case DUPLEX_HALF: 331 default: 332 retval = 0x0; 333 pr_debug("Port %d Received status NOT full duplex update from adapter\n", 334 port->actor_port_number); 335 break; 336 } 337 } 338 return retval; 339 } 340 341 /** 342 * __initialize_port_locks - initialize a port's STATE machine spinlock 343 * @port: the slave of the port we're looking at 344 * 345 */ 346 static inline void __initialize_port_locks(struct slave *slave) 347 { 348 // make sure it isn't called twice 349 spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock)); 350 } 351 352 //conversions 353 354 /** 355 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 356 * @timer_type: which timer to operate 357 * @par: timer parameter. see below 358 * 359 * If @timer_type is %current_while_timer, @par indicates long/short timer. 360 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 361 * %SLOW_PERIODIC_TIME. 362 */ 363 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 364 { 365 u16 retval = 0; /* to silence the compiler */ 366 367 switch (timer_type) { 368 case AD_CURRENT_WHILE_TIMER: // for rx machine usage 369 if (par) 370 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout 371 else 372 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout 373 break; 374 case AD_ACTOR_CHURN_TIMER: // for local churn machine 375 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 376 break; 377 case AD_PERIODIC_TIMER: // for periodic machine 378 retval = (par*ad_ticks_per_sec); // long timeout 379 break; 380 case AD_PARTNER_CHURN_TIMER: // for remote churn machine 381 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 382 break; 383 case AD_WAIT_WHILE_TIMER: // for selection machine 384 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 385 break; 386 } 387 return retval; 388 } 389 390 391 ///////////////////////////////////////////////////////////////////////////////// 392 // ================= ad_rx_machine helper functions ================== 393 ///////////////////////////////////////////////////////////////////////////////// 394 395 /** 396 * __choose_matched - update a port's matched variable from a received lacpdu 397 * @lacpdu: the lacpdu we've received 398 * @port: the port we're looking at 399 * 400 * Update the value of the matched variable, using parameter values from a 401 * newly received lacpdu. Parameter values for the partner carried in the 402 * received PDU are compared with the corresponding operational parameter 403 * values for the actor. Matched is set to TRUE if all of these parameters 404 * match and the PDU parameter partner_state.aggregation has the same value as 405 * actor_oper_port_state.aggregation and lacp will actively maintain the link 406 * in the aggregation. Matched is also set to TRUE if the value of 407 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 408 * an individual link and lacp will actively maintain the link. Otherwise, 409 * matched is set to FALSE. LACP is considered to be actively maintaining the 410 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 411 * the actor's actor_oper_port_state.lacp_activity and the PDU's 412 * partner_state.lacp_activity variables are TRUE. 413 * 414 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 415 * used here to implement the language from 802.3ad 43.4.9 that requires 416 * recordPDU to "match" the LACPDU parameters to the stored values. 417 */ 418 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 419 { 420 // check if all parameters are alike 421 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 422 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 423 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && 424 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 425 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 426 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 427 // or this is individual link(aggregation == FALSE) 428 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 429 ) { 430 // update the state machine Matched variable 431 port->sm_vars |= AD_PORT_MATCHED; 432 } else { 433 port->sm_vars &= ~AD_PORT_MATCHED; 434 } 435 } 436 437 /** 438 * __record_pdu - record parameters from a received lacpdu 439 * @lacpdu: the lacpdu we've received 440 * @port: the port we're looking at 441 * 442 * Record the parameter values for the Actor carried in a received lacpdu as 443 * the current partner operational parameter values and sets 444 * actor_oper_port_state.defaulted to FALSE. 445 */ 446 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 447 { 448 if (lacpdu && port) { 449 struct port_params *partner = &port->partner_oper; 450 451 __choose_matched(lacpdu, port); 452 // record the new parameter values for the partner operational 453 partner->port_number = ntohs(lacpdu->actor_port); 454 partner->port_priority = ntohs(lacpdu->actor_port_priority); 455 partner->system = lacpdu->actor_system; 456 partner->system_priority = ntohs(lacpdu->actor_system_priority); 457 partner->key = ntohs(lacpdu->actor_key); 458 partner->port_state = lacpdu->actor_state; 459 460 // set actor_oper_port_state.defaulted to FALSE 461 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 462 463 // set the partner sync. to on if the partner is sync. and the port is matched 464 if ((port->sm_vars & AD_PORT_MATCHED) 465 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) 466 partner->port_state |= AD_STATE_SYNCHRONIZATION; 467 else 468 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 469 } 470 } 471 472 /** 473 * __record_default - record default parameters 474 * @port: the port we're looking at 475 * 476 * This function records the default parameter values for the partner carried 477 * in the Partner Admin parameters as the current partner operational parameter 478 * values and sets actor_oper_port_state.defaulted to TRUE. 479 */ 480 static void __record_default(struct port *port) 481 { 482 if (port) { 483 // record the partner admin parameters 484 memcpy(&port->partner_oper, &port->partner_admin, 485 sizeof(struct port_params)); 486 487 // set actor_oper_port_state.defaulted to true 488 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 489 } 490 } 491 492 /** 493 * __update_selected - update a port's Selected variable from a received lacpdu 494 * @lacpdu: the lacpdu we've received 495 * @port: the port we're looking at 496 * 497 * Update the value of the selected variable, using parameter values from a 498 * newly received lacpdu. The parameter values for the Actor carried in the 499 * received PDU are compared with the corresponding operational parameter 500 * values for the ports partner. If one or more of the comparisons shows that 501 * the value(s) received in the PDU differ from the current operational values, 502 * then selected is set to FALSE and actor_oper_port_state.synchronization is 503 * set to out_of_sync. Otherwise, selected remains unchanged. 504 */ 505 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 506 { 507 if (lacpdu && port) { 508 const struct port_params *partner = &port->partner_oper; 509 510 // check if any parameter is different 511 if (ntohs(lacpdu->actor_port) != partner->port_number || 512 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 513 MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) || 514 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 515 ntohs(lacpdu->actor_key) != partner->key || 516 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 517 // update the state machine Selected variable 518 port->sm_vars &= ~AD_PORT_SELECTED; 519 } 520 } 521 } 522 523 /** 524 * __update_default_selected - update a port's Selected variable from Partner 525 * @port: the port we're looking at 526 * 527 * This function updates the value of the selected variable, using the partner 528 * administrative parameter values. The administrative values are compared with 529 * the corresponding operational parameter values for the partner. If one or 530 * more of the comparisons shows that the administrative value(s) differ from 531 * the current operational values, then Selected is set to FALSE and 532 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 533 * Selected remains unchanged. 534 */ 535 static void __update_default_selected(struct port *port) 536 { 537 if (port) { 538 const struct port_params *admin = &port->partner_admin; 539 const struct port_params *oper = &port->partner_oper; 540 541 // check if any parameter is different 542 if (admin->port_number != oper->port_number || 543 admin->port_priority != oper->port_priority || 544 MAC_ADDRESS_COMPARE(&admin->system, &oper->system) || 545 admin->system_priority != oper->system_priority || 546 admin->key != oper->key || 547 (admin->port_state & AD_STATE_AGGREGATION) 548 != (oper->port_state & AD_STATE_AGGREGATION)) { 549 // update the state machine Selected variable 550 port->sm_vars &= ~AD_PORT_SELECTED; 551 } 552 } 553 } 554 555 /** 556 * __update_ntt - update a port's ntt variable from a received lacpdu 557 * @lacpdu: the lacpdu we've received 558 * @port: the port we're looking at 559 * 560 * Updates the value of the ntt variable, using parameter values from a newly 561 * received lacpdu. The parameter values for the partner carried in the 562 * received PDU are compared with the corresponding operational parameter 563 * values for the Actor. If one or more of the comparisons shows that the 564 * value(s) received in the PDU differ from the current operational values, 565 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 566 */ 567 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 568 { 569 // validate lacpdu and port 570 if (lacpdu && port) { 571 // check if any parameter is different 572 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 573 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 574 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || 575 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 576 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 577 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 578 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 579 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 580 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 581 ) { 582 583 port->ntt = true; 584 } 585 } 586 } 587 588 /** 589 * __attach_bond_to_agg 590 * @port: the port we're looking at 591 * 592 * Handle the attaching of the port's control parser/multiplexer and the 593 * aggregator. This function does nothing since the parser/multiplexer of the 594 * receive and the parser/multiplexer of the aggregator are already combined. 595 */ 596 static void __attach_bond_to_agg(struct port *port) 597 { 598 port = NULL; /* just to satisfy the compiler */ 599 // This function does nothing since the parser/multiplexer of the receive 600 // and the parser/multiplexer of the aggregator are already combined 601 } 602 603 /** 604 * __detach_bond_from_agg 605 * @port: the port we're looking at 606 * 607 * Handle the detaching of the port's control parser/multiplexer from the 608 * aggregator. This function does nothing since the parser/multiplexer of the 609 * receive and the parser/multiplexer of the aggregator are already combined. 610 */ 611 static void __detach_bond_from_agg(struct port *port) 612 { 613 port = NULL; /* just to satisfy the compiler */ 614 // This function does nothing since the parser/multiplexer of the receive 615 // and the parser/multiplexer of the aggregator are already combined 616 } 617 618 /** 619 * __agg_ports_are_ready - check if all ports in an aggregator are ready 620 * @aggregator: the aggregator we're looking at 621 * 622 */ 623 static int __agg_ports_are_ready(struct aggregator *aggregator) 624 { 625 struct port *port; 626 int retval = 1; 627 628 if (aggregator) { 629 // scan all ports in this aggregator to verfy if they are all ready 630 for (port = aggregator->lag_ports; 631 port; 632 port = port->next_port_in_aggregator) { 633 if (!(port->sm_vars & AD_PORT_READY_N)) { 634 retval = 0; 635 break; 636 } 637 } 638 } 639 640 return retval; 641 } 642 643 /** 644 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 645 * @aggregator: the aggregator we're looking at 646 * @val: Should the ports' ready bit be set on or off 647 * 648 */ 649 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 650 { 651 struct port *port; 652 653 for (port = aggregator->lag_ports; port; 654 port = port->next_port_in_aggregator) { 655 if (val) 656 port->sm_vars |= AD_PORT_READY; 657 else 658 port->sm_vars &= ~AD_PORT_READY; 659 } 660 } 661 662 /** 663 * __get_agg_bandwidth - get the total bandwidth of an aggregator 664 * @aggregator: the aggregator we're looking at 665 * 666 */ 667 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 668 { 669 u32 bandwidth = 0; 670 671 if (aggregator->num_of_ports) { 672 switch (__get_link_speed(aggregator->lag_ports)) { 673 case AD_LINK_SPEED_BITMASK_1MBPS: 674 bandwidth = aggregator->num_of_ports; 675 break; 676 case AD_LINK_SPEED_BITMASK_10MBPS: 677 bandwidth = aggregator->num_of_ports * 10; 678 break; 679 case AD_LINK_SPEED_BITMASK_100MBPS: 680 bandwidth = aggregator->num_of_ports * 100; 681 break; 682 case AD_LINK_SPEED_BITMASK_1000MBPS: 683 bandwidth = aggregator->num_of_ports * 1000; 684 break; 685 case AD_LINK_SPEED_BITMASK_10000MBPS: 686 bandwidth = aggregator->num_of_ports * 10000; 687 break; 688 default: 689 bandwidth = 0; /*to silence the compiler ....*/ 690 } 691 } 692 return bandwidth; 693 } 694 695 /** 696 * __get_active_agg - get the current active aggregator 697 * @aggregator: the aggregator we're looking at 698 * 699 */ 700 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 701 { 702 struct bonding *bond = aggregator->slave->bond; 703 struct list_head *iter; 704 struct slave *slave; 705 706 rcu_read_lock(); 707 bond_for_each_slave_rcu(bond, slave, iter) 708 if (SLAVE_AD_INFO(slave).aggregator.is_active) { 709 rcu_read_unlock(); 710 return &(SLAVE_AD_INFO(slave).aggregator); 711 } 712 rcu_read_unlock(); 713 714 return NULL; 715 } 716 717 /** 718 * __update_lacpdu_from_port - update a port's lacpdu fields 719 * @port: the port we're looking at 720 * 721 */ 722 static inline void __update_lacpdu_from_port(struct port *port) 723 { 724 struct lacpdu *lacpdu = &port->lacpdu; 725 const struct port_params *partner = &port->partner_oper; 726 727 /* update current actual Actor parameters */ 728 /* lacpdu->subtype initialized 729 * lacpdu->version_number initialized 730 * lacpdu->tlv_type_actor_info initialized 731 * lacpdu->actor_information_length initialized 732 */ 733 734 lacpdu->actor_system_priority = htons(port->actor_system_priority); 735 lacpdu->actor_system = port->actor_system; 736 lacpdu->actor_key = htons(port->actor_oper_port_key); 737 lacpdu->actor_port_priority = htons(port->actor_port_priority); 738 lacpdu->actor_port = htons(port->actor_port_number); 739 lacpdu->actor_state = port->actor_oper_port_state; 740 741 /* lacpdu->reserved_3_1 initialized 742 * lacpdu->tlv_type_partner_info initialized 743 * lacpdu->partner_information_length initialized 744 */ 745 746 lacpdu->partner_system_priority = htons(partner->system_priority); 747 lacpdu->partner_system = partner->system; 748 lacpdu->partner_key = htons(partner->key); 749 lacpdu->partner_port_priority = htons(partner->port_priority); 750 lacpdu->partner_port = htons(partner->port_number); 751 lacpdu->partner_state = partner->port_state; 752 753 /* lacpdu->reserved_3_2 initialized 754 * lacpdu->tlv_type_collector_info initialized 755 * lacpdu->collector_information_length initialized 756 * collector_max_delay initialized 757 * reserved_12[12] initialized 758 * tlv_type_terminator initialized 759 * terminator_length initialized 760 * reserved_50[50] initialized 761 */ 762 } 763 764 ////////////////////////////////////////////////////////////////////////////////////// 765 // ================= main 802.3ad protocol code ====================================== 766 ////////////////////////////////////////////////////////////////////////////////////// 767 768 /** 769 * ad_lacpdu_send - send out a lacpdu packet on a given port 770 * @port: the port we're looking at 771 * 772 * Returns: 0 on success 773 * < 0 on error 774 */ 775 static int ad_lacpdu_send(struct port *port) 776 { 777 struct slave *slave = port->slave; 778 struct sk_buff *skb; 779 struct lacpdu_header *lacpdu_header; 780 int length = sizeof(struct lacpdu_header); 781 782 skb = dev_alloc_skb(length); 783 if (!skb) 784 return -ENOMEM; 785 786 skb->dev = slave->dev; 787 skb_reset_mac_header(skb); 788 skb->network_header = skb->mac_header + ETH_HLEN; 789 skb->protocol = PKT_TYPE_LACPDU; 790 skb->priority = TC_PRIO_CONTROL; 791 792 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 793 794 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); 795 /* Note: source address is set to be the member's PERMANENT address, 796 because we use it to identify loopback lacpdus in receive. */ 797 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); 798 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 799 800 lacpdu_header->lacpdu = port->lacpdu; // struct copy 801 802 dev_queue_xmit(skb); 803 804 return 0; 805 } 806 807 /** 808 * ad_marker_send - send marker information/response on a given port 809 * @port: the port we're looking at 810 * @marker: marker data to send 811 * 812 * Returns: 0 on success 813 * < 0 on error 814 */ 815 static int ad_marker_send(struct port *port, struct bond_marker *marker) 816 { 817 struct slave *slave = port->slave; 818 struct sk_buff *skb; 819 struct bond_marker_header *marker_header; 820 int length = sizeof(struct bond_marker_header); 821 822 skb = dev_alloc_skb(length + 16); 823 if (!skb) 824 return -ENOMEM; 825 826 skb_reserve(skb, 16); 827 828 skb->dev = slave->dev; 829 skb_reset_mac_header(skb); 830 skb->network_header = skb->mac_header + ETH_HLEN; 831 skb->protocol = PKT_TYPE_LACPDU; 832 833 marker_header = (struct bond_marker_header *)skb_put(skb, length); 834 835 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); 836 /* Note: source address is set to be the member's PERMANENT address, 837 because we use it to identify loopback MARKERs in receive. */ 838 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); 839 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 840 841 marker_header->marker = *marker; // struct copy 842 843 dev_queue_xmit(skb); 844 845 return 0; 846 } 847 848 /** 849 * ad_mux_machine - handle a port's mux state machine 850 * @port: the port we're looking at 851 * 852 */ 853 static void ad_mux_machine(struct port *port) 854 { 855 mux_states_t last_state; 856 857 // keep current State Machine state to compare later if it was changed 858 last_state = port->sm_mux_state; 859 860 if (port->sm_vars & AD_PORT_BEGIN) { 861 port->sm_mux_state = AD_MUX_DETACHED; // next state 862 } else { 863 switch (port->sm_mux_state) { 864 case AD_MUX_DETACHED: 865 if ((port->sm_vars & AD_PORT_SELECTED) 866 || (port->sm_vars & AD_PORT_STANDBY)) 867 /* if SELECTED or STANDBY */ 868 port->sm_mux_state = AD_MUX_WAITING; // next state 869 break; 870 case AD_MUX_WAITING: 871 // if SELECTED == FALSE return to DETACH state 872 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED 873 port->sm_vars &= ~AD_PORT_READY_N; 874 // in order to withhold the Selection Logic to check all ports READY_N value 875 // every callback cycle to update ready variable, we check READY_N and update READY here 876 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 877 port->sm_mux_state = AD_MUX_DETACHED; // next state 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 all ports READY_N value 887 // every callback cycle to update ready variable, we check READY_N and update READY here 888 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 889 890 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state 891 if ((port->sm_vars & AD_PORT_READY) 892 && !port->sm_mux_timer_counter) 893 port->sm_mux_state = AD_MUX_ATTACHED; // next state 894 break; 895 case AD_MUX_ATTACHED: 896 // check also if agg_select_timer expired(so the edable port will take place only after this timer) 897 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { 898 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state 899 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY 900 port->sm_vars &= ~AD_PORT_READY_N; 901 // in order to withhold the selection logic to check all ports READY_N value 902 // every callback cycle to update ready variable, we check READY_N and update READY here 903 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 904 port->sm_mux_state = AD_MUX_DETACHED;// next state 905 } 906 break; 907 case AD_MUX_COLLECTING_DISTRIBUTING: 908 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || 909 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) 910 ) { 911 port->sm_mux_state = AD_MUX_ATTACHED;// next state 912 913 } else { 914 // if port state hasn't changed make 915 // sure that a collecting distributing 916 // port in an active aggregator is enabled 917 if (port->aggregator && 918 port->aggregator->is_active && 919 !__port_is_enabled(port)) { 920 921 __enable_port(port); 922 } 923 } 924 break; 925 default: //to silence the compiler 926 break; 927 } 928 } 929 930 // check if the state machine was changed 931 if (port->sm_mux_state != last_state) { 932 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", 933 port->actor_port_number, last_state, 934 port->sm_mux_state); 935 switch (port->sm_mux_state) { 936 case AD_MUX_DETACHED: 937 __detach_bond_from_agg(port); 938 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 939 ad_disable_collecting_distributing(port); 940 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 941 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 942 port->ntt = true; 943 break; 944 case AD_MUX_WAITING: 945 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 946 break; 947 case AD_MUX_ATTACHED: 948 __attach_bond_to_agg(port); 949 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 950 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 951 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 952 ad_disable_collecting_distributing(port); 953 port->ntt = true; 954 break; 955 case AD_MUX_COLLECTING_DISTRIBUTING: 956 port->actor_oper_port_state |= AD_STATE_COLLECTING; 957 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 958 ad_enable_collecting_distributing(port); 959 port->ntt = true; 960 break; 961 default: //to silence the compiler 962 break; 963 } 964 } 965 } 966 967 /** 968 * ad_rx_machine - handle a port's rx State Machine 969 * @lacpdu: the lacpdu we've received 970 * @port: the port we're looking at 971 * 972 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 973 * CURRENT. If timer expired set the state machine in the proper state. 974 * In other cases, this function checks if we need to switch to other state. 975 */ 976 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 977 { 978 rx_states_t last_state; 979 980 // keep current State Machine state to compare later if it was changed 981 last_state = port->sm_rx_state; 982 983 // check if state machine should change state 984 // first, check if port was reinitialized 985 if (port->sm_vars & AD_PORT_BEGIN) 986 /* next state */ 987 port->sm_rx_state = AD_RX_INITIALIZE; 988 // check if port is not enabled 989 else if (!(port->sm_vars & AD_PORT_BEGIN) 990 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) 991 /* next state */ 992 port->sm_rx_state = AD_RX_PORT_DISABLED; 993 // check if new lacpdu arrived 994 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { 995 port->sm_rx_timer_counter = 0; // zero timer 996 port->sm_rx_state = AD_RX_CURRENT; 997 } else { 998 // if timer is on, and if it is expired 999 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { 1000 switch (port->sm_rx_state) { 1001 case AD_RX_EXPIRED: 1002 port->sm_rx_state = AD_RX_DEFAULTED; // next state 1003 break; 1004 case AD_RX_CURRENT: 1005 port->sm_rx_state = AD_RX_EXPIRED; // next state 1006 break; 1007 default: //to silence the compiler 1008 break; 1009 } 1010 } else { 1011 // if no lacpdu arrived and no timer is on 1012 switch (port->sm_rx_state) { 1013 case AD_RX_PORT_DISABLED: 1014 if (port->sm_vars & AD_PORT_MOVED) 1015 port->sm_rx_state = AD_RX_INITIALIZE; // next state 1016 else if (port->is_enabled 1017 && (port->sm_vars 1018 & AD_PORT_LACP_ENABLED)) 1019 port->sm_rx_state = AD_RX_EXPIRED; // next state 1020 else if (port->is_enabled 1021 && ((port->sm_vars 1022 & AD_PORT_LACP_ENABLED) == 0)) 1023 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state 1024 break; 1025 default: //to silence the compiler 1026 break; 1027 1028 } 1029 } 1030 } 1031 1032 // check if the State machine was changed or new lacpdu arrived 1033 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1034 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", 1035 port->actor_port_number, last_state, 1036 port->sm_rx_state); 1037 switch (port->sm_rx_state) { 1038 case AD_RX_INITIALIZE: 1039 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) 1040 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1041 else 1042 port->sm_vars |= AD_PORT_LACP_ENABLED; 1043 port->sm_vars &= ~AD_PORT_SELECTED; 1044 __record_default(port); 1045 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1046 port->sm_vars &= ~AD_PORT_MOVED; 1047 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state 1048 1049 /*- Fall Through -*/ 1050 1051 case AD_RX_PORT_DISABLED: 1052 port->sm_vars &= ~AD_PORT_MATCHED; 1053 break; 1054 case AD_RX_LACP_DISABLED: 1055 port->sm_vars &= ~AD_PORT_SELECTED; 1056 __record_default(port); 1057 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1058 port->sm_vars |= AD_PORT_MATCHED; 1059 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1060 break; 1061 case AD_RX_EXPIRED: 1062 //Reset of the Synchronization flag. (Standard 43.4.12) 1063 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the 1064 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. 1065 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1066 port->sm_vars &= ~AD_PORT_MATCHED; 1067 port->partner_oper.port_state |= 1068 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_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { 1081 // INFO_RECEIVED_LOOPBACK_FRAMES 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, port->slave->dev->name); 1085 return; 1086 } 1087 __update_selected(lacpdu, port); 1088 __update_ntt(lacpdu, port); 1089 __record_pdu(lacpdu, port); 1090 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1091 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1092 break; 1093 default: //to silence the compiler 1094 break; 1095 } 1096 } 1097 } 1098 1099 /** 1100 * ad_tx_machine - handle a port's tx state machine 1101 * @port: the port we're looking at 1102 * 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 3 packets per second 1107 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1108 // check if there is something to send 1109 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1110 __update_lacpdu_from_port(port); 1111 1112 if (ad_lacpdu_send(port) >= 0) { 1113 pr_debug("Sent LACPDU on port %d\n", 1114 port->actor_port_number); 1115 1116 /* mark ntt as false, so it will not be sent again until 1117 demanded */ 1118 port->ntt = false; 1119 } 1120 } 1121 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND 1122 port->sm_tx_timer_counter = 1123 ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1124 } 1125 } 1126 1127 /** 1128 * ad_periodic_machine - handle a port's periodic state machine 1129 * @port: the port we're looking at 1130 * 1131 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1132 */ 1133 static void ad_periodic_machine(struct port *port) 1134 { 1135 periodic_states_t last_state; 1136 1137 // keep current state machine state to compare later if it was changed 1138 last_state = port->sm_periodic_state; 1139 1140 // check if port was reinitialized 1141 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1142 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1143 ) { 1144 port->sm_periodic_state = AD_NO_PERIODIC; // next state 1145 } 1146 // check if state machine should change state 1147 else if (port->sm_periodic_timer_counter) { 1148 // check if periodic state machine expired 1149 if (!(--port->sm_periodic_timer_counter)) { 1150 // if expired then do tx 1151 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1152 } else { 1153 // If not expired, check if there is some new timeout parameter from the partner state 1154 switch (port->sm_periodic_state) { 1155 case AD_FAST_PERIODIC: 1156 if (!(port->partner_oper.port_state 1157 & AD_STATE_LACP_TIMEOUT)) 1158 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1159 break; 1160 case AD_SLOW_PERIODIC: 1161 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1162 // stop current timer 1163 port->sm_periodic_timer_counter = 0; 1164 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1165 } 1166 break; 1167 default: //to silence the compiler 1168 break; 1169 } 1170 } 1171 } else { 1172 switch (port->sm_periodic_state) { 1173 case AD_NO_PERIODIC: 1174 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1175 break; 1176 case AD_PERIODIC_TX: 1177 if (!(port->partner_oper.port_state 1178 & AD_STATE_LACP_TIMEOUT)) 1179 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1180 else 1181 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1182 break; 1183 default: //to silence the compiler 1184 break; 1185 } 1186 } 1187 1188 // check if the state machine was changed 1189 if (port->sm_periodic_state != last_state) { 1190 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1191 port->actor_port_number, last_state, 1192 port->sm_periodic_state); 1193 switch (port->sm_periodic_state) { 1194 case AD_NO_PERIODIC: 1195 port->sm_periodic_timer_counter = 0; // zero timer 1196 break; 1197 case AD_FAST_PERIODIC: 1198 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle 1199 break; 1200 case AD_SLOW_PERIODIC: 1201 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle 1202 break; 1203 case AD_PERIODIC_TX: 1204 port->ntt = true; 1205 break; 1206 default: //to silence the compiler 1207 break; 1208 } 1209 } 1210 } 1211 1212 /** 1213 * ad_port_selection_logic - select aggregation groups 1214 * @port: the port we're looking at 1215 * 1216 * Select aggregation groups, and assign each port for it's aggregetor. The 1217 * selection logic is called in the inititalization (after all the handshkes), 1218 * and after every lacpdu receive (if selected is off). 1219 */ 1220 static void ad_port_selection_logic(struct port *port) 1221 { 1222 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1223 struct port *last_port = NULL, *curr_port; 1224 struct list_head *iter; 1225 struct bonding *bond; 1226 struct slave *slave; 1227 int found = 0; 1228 1229 // if the port is already Selected, do nothing 1230 if (port->sm_vars & AD_PORT_SELECTED) 1231 return; 1232 1233 bond = __get_bond_by_port(port); 1234 1235 // if the port is connected to other aggregator, detach it 1236 if (port->aggregator) { 1237 // detach the port from its former aggregator 1238 temp_aggregator = port->aggregator; 1239 for (curr_port = temp_aggregator->lag_ports; curr_port; 1240 last_port = curr_port, 1241 curr_port = curr_port->next_port_in_aggregator) { 1242 if (curr_port == port) { 1243 temp_aggregator->num_of_ports--; 1244 if (!last_port) {// if it is the first port attached to the aggregator 1245 temp_aggregator->lag_ports = 1246 port->next_port_in_aggregator; 1247 } else {// not the first port attached to the aggregator 1248 last_port->next_port_in_aggregator = 1249 port->next_port_in_aggregator; 1250 } 1251 1252 // clear the port's relations to this aggregator 1253 port->aggregator = NULL; 1254 port->next_port_in_aggregator = NULL; 1255 port->actor_port_aggregator_identifier = 0; 1256 1257 pr_debug("Port %d left LAG %d\n", 1258 port->actor_port_number, 1259 temp_aggregator->aggregator_identifier); 1260 // if the aggregator is empty, clear its parameters, and set it ready to be attached 1261 if (!temp_aggregator->lag_ports) 1262 ad_clear_agg(temp_aggregator); 1263 break; 1264 } 1265 } 1266 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list 1267 pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1268 port->slave->bond->dev->name, 1269 port->actor_port_number, 1270 port->slave->dev->name, 1271 port->aggregator->aggregator_identifier); 1272 } 1273 } 1274 // search on all aggregators for a suitable aggregator for this port 1275 bond_for_each_slave(bond, slave, iter) { 1276 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1277 1278 // keep a free aggregator for later use(if needed) 1279 if (!aggregator->lag_ports) { 1280 if (!free_aggregator) 1281 free_aggregator = aggregator; 1282 continue; 1283 } 1284 // check if current aggregator suits us 1285 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND 1286 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) && 1287 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1288 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1289 ) && 1290 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers 1291 !aggregator->is_individual) // but is not individual OR 1292 ) 1293 ) { 1294 // attach to the founded aggregator 1295 port->aggregator = aggregator; 1296 port->actor_port_aggregator_identifier = 1297 port->aggregator->aggregator_identifier; 1298 port->next_port_in_aggregator = aggregator->lag_ports; 1299 port->aggregator->num_of_ports++; 1300 aggregator->lag_ports = port; 1301 pr_debug("Port %d joined LAG %d(existing LAG)\n", 1302 port->actor_port_number, 1303 port->aggregator->aggregator_identifier); 1304 1305 // mark this port as selected 1306 port->sm_vars |= AD_PORT_SELECTED; 1307 found = 1; 1308 break; 1309 } 1310 } 1311 1312 // the port couldn't find an aggregator - attach it to a new aggregator 1313 if (!found) { 1314 if (free_aggregator) { 1315 // assign port a new aggregator 1316 port->aggregator = free_aggregator; 1317 port->actor_port_aggregator_identifier = 1318 port->aggregator->aggregator_identifier; 1319 1320 // update the new aggregator's parameters 1321 // if port was responsed from the end-user 1322 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) 1323 /* if port is full duplex */ 1324 port->aggregator->is_individual = false; 1325 else 1326 port->aggregator->is_individual = true; 1327 1328 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; 1329 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; 1330 port->aggregator->partner_system = 1331 port->partner_oper.system; 1332 port->aggregator->partner_system_priority = 1333 port->partner_oper.system_priority; 1334 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1335 port->aggregator->receive_state = 1; 1336 port->aggregator->transmit_state = 1; 1337 port->aggregator->lag_ports = port; 1338 port->aggregator->num_of_ports++; 1339 1340 // mark this port as selected 1341 port->sm_vars |= AD_PORT_SELECTED; 1342 1343 pr_debug("Port %d joined LAG %d(new LAG)\n", 1344 port->actor_port_number, 1345 port->aggregator->aggregator_identifier); 1346 } else { 1347 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n", 1348 port->slave->bond->dev->name, 1349 port->actor_port_number, port->slave->dev->name); 1350 } 1351 } 1352 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports 1353 // else set ready=FALSE in all aggregator's ports 1354 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1355 1356 aggregator = __get_first_agg(port); 1357 ad_agg_selection_logic(aggregator); 1358 } 1359 1360 /* 1361 * Decide if "agg" is a better choice for the new active aggregator that 1362 * the current best, according to the ad_select policy. 1363 */ 1364 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1365 struct aggregator *curr) 1366 { 1367 /* 1368 * 0. If no best, select current. 1369 * 1370 * 1. If the current agg is not individual, and the best is 1371 * individual, select current. 1372 * 1373 * 2. If current agg is individual and the best is not, keep best. 1374 * 1375 * 3. Therefore, current and best are both individual or both not 1376 * individual, so: 1377 * 1378 * 3a. If current agg partner replied, and best agg partner did not, 1379 * select current. 1380 * 1381 * 3b. If current agg partner did not reply and best agg partner 1382 * did reply, keep best. 1383 * 1384 * 4. Therefore, current and best both have partner replies or 1385 * both do not, so perform selection policy: 1386 * 1387 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1388 * select by bandwidth. 1389 * 1390 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1391 */ 1392 if (!best) 1393 return curr; 1394 1395 if (!curr->is_individual && best->is_individual) 1396 return curr; 1397 1398 if (curr->is_individual && !best->is_individual) 1399 return best; 1400 1401 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1402 return curr; 1403 1404 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1405 return best; 1406 1407 switch (__get_agg_selection_mode(curr->lag_ports)) { 1408 case BOND_AD_COUNT: 1409 if (curr->num_of_ports > best->num_of_ports) 1410 return curr; 1411 1412 if (curr->num_of_ports < best->num_of_ports) 1413 return best; 1414 1415 /*FALLTHROUGH*/ 1416 case BOND_AD_STABLE: 1417 case BOND_AD_BANDWIDTH: 1418 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1419 return curr; 1420 1421 break; 1422 1423 default: 1424 pr_warning("%s: Impossible agg select mode %d\n", 1425 curr->slave->bond->dev->name, 1426 __get_agg_selection_mode(curr->lag_ports)); 1427 break; 1428 } 1429 1430 return best; 1431 } 1432 1433 static int agg_device_up(const struct aggregator *agg) 1434 { 1435 struct port *port = agg->lag_ports; 1436 if (!port) 1437 return 0; 1438 return (netif_running(port->slave->dev) && 1439 netif_carrier_ok(port->slave->dev)); 1440 } 1441 1442 /** 1443 * ad_agg_selection_logic - select an aggregation group for a team 1444 * @aggregator: the aggregator we're looking at 1445 * 1446 * It is assumed that only one aggregator may be selected for a team. 1447 * 1448 * The logic of this function is to select the aggregator according to 1449 * the ad_select policy: 1450 * 1451 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1452 * it, and to reselect the active aggregator only if the previous 1453 * aggregator has no more ports related to it. 1454 * 1455 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1456 * bandwidth, and reselect whenever a link state change takes place or the 1457 * set of slaves in the bond changes. 1458 * 1459 * BOND_AD_COUNT: select the aggregator with largest number of ports 1460 * (slaves), and reselect whenever a link state change takes place or the 1461 * set of slaves in the bond changes. 1462 * 1463 * FIXME: this function MUST be called with the first agg in the bond, or 1464 * __get_active_agg() won't work correctly. This function should be better 1465 * called with the bond itself, and retrieve the first agg from it. 1466 */ 1467 static void ad_agg_selection_logic(struct aggregator *agg) 1468 { 1469 struct aggregator *best, *active, *origin; 1470 struct bonding *bond = agg->slave->bond; 1471 struct list_head *iter; 1472 struct slave *slave; 1473 struct port *port; 1474 1475 origin = agg; 1476 active = __get_active_agg(agg); 1477 best = (active && agg_device_up(active)) ? active : NULL; 1478 1479 rcu_read_lock(); 1480 bond_for_each_slave_rcu(bond, slave, iter) { 1481 agg = &(SLAVE_AD_INFO(slave).aggregator); 1482 1483 agg->is_active = 0; 1484 1485 if (agg->num_of_ports && agg_device_up(agg)) 1486 best = ad_agg_selection_test(best, agg); 1487 } 1488 1489 if (best && 1490 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1491 /* 1492 * For the STABLE policy, don't replace the old active 1493 * aggregator if it's still active (it has an answering 1494 * partner) or if both the best and active don't have an 1495 * answering partner. 1496 */ 1497 if (active && active->lag_ports && 1498 active->lag_ports->is_enabled && 1499 (__agg_has_partner(active) || 1500 (!__agg_has_partner(active) && !__agg_has_partner(best)))) { 1501 if (!(!active->actor_oper_aggregator_key && 1502 best->actor_oper_aggregator_key)) { 1503 best = NULL; 1504 active->is_active = 1; 1505 } 1506 } 1507 } 1508 1509 if (best && (best == active)) { 1510 best = NULL; 1511 active->is_active = 1; 1512 } 1513 1514 /* if there is new best aggregator, activate it */ 1515 if (best) { 1516 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1517 best->aggregator_identifier, best->num_of_ports, 1518 best->actor_oper_aggregator_key, 1519 best->partner_oper_aggregator_key, 1520 best->is_individual, best->is_active); 1521 pr_debug("best ports %p slave %p %s\n", 1522 best->lag_ports, best->slave, 1523 best->slave ? best->slave->dev->name : "NULL"); 1524 1525 bond_for_each_slave_rcu(bond, slave, iter) { 1526 agg = &(SLAVE_AD_INFO(slave).aggregator); 1527 1528 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1529 agg->aggregator_identifier, agg->num_of_ports, 1530 agg->actor_oper_aggregator_key, 1531 agg->partner_oper_aggregator_key, 1532 agg->is_individual, agg->is_active); 1533 } 1534 1535 /* check if any partner replys */ 1536 if (best->is_individual) { 1537 pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1538 best->slave ? 1539 best->slave->bond->dev->name : "NULL"); 1540 } 1541 1542 best->is_active = 1; 1543 pr_debug("LAG %d chosen as the active LAG\n", 1544 best->aggregator_identifier); 1545 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1546 best->aggregator_identifier, best->num_of_ports, 1547 best->actor_oper_aggregator_key, 1548 best->partner_oper_aggregator_key, 1549 best->is_individual, best->is_active); 1550 1551 /* disable the ports that were related to the former active_aggregator */ 1552 if (active) { 1553 for (port = active->lag_ports; port; 1554 port = port->next_port_in_aggregator) { 1555 __disable_port(port); 1556 } 1557 } 1558 } 1559 1560 /* 1561 * if the selected aggregator is of join individuals 1562 * (partner_system is NULL), enable their ports 1563 */ 1564 active = __get_active_agg(origin); 1565 1566 if (active) { 1567 if (!__agg_has_partner(active)) { 1568 for (port = active->lag_ports; port; 1569 port = port->next_port_in_aggregator) { 1570 __enable_port(port); 1571 } 1572 } 1573 } 1574 1575 rcu_read_unlock(); 1576 1577 bond_3ad_set_carrier(bond); 1578 } 1579 1580 /** 1581 * ad_clear_agg - clear a given aggregator's parameters 1582 * @aggregator: the aggregator we're looking at 1583 * 1584 */ 1585 static void ad_clear_agg(struct aggregator *aggregator) 1586 { 1587 if (aggregator) { 1588 aggregator->is_individual = false; 1589 aggregator->actor_admin_aggregator_key = 0; 1590 aggregator->actor_oper_aggregator_key = 0; 1591 aggregator->partner_system = null_mac_addr; 1592 aggregator->partner_system_priority = 0; 1593 aggregator->partner_oper_aggregator_key = 0; 1594 aggregator->receive_state = 0; 1595 aggregator->transmit_state = 0; 1596 aggregator->lag_ports = NULL; 1597 aggregator->is_active = 0; 1598 aggregator->num_of_ports = 0; 1599 pr_debug("LAG %d was cleared\n", 1600 aggregator->aggregator_identifier); 1601 } 1602 } 1603 1604 /** 1605 * ad_initialize_agg - initialize a given aggregator's parameters 1606 * @aggregator: the aggregator we're looking at 1607 * 1608 */ 1609 static void ad_initialize_agg(struct aggregator *aggregator) 1610 { 1611 if (aggregator) { 1612 ad_clear_agg(aggregator); 1613 1614 aggregator->aggregator_mac_address = null_mac_addr; 1615 aggregator->aggregator_identifier = 0; 1616 aggregator->slave = NULL; 1617 } 1618 } 1619 1620 /** 1621 * ad_initialize_port - initialize a given port's parameters 1622 * @aggregator: the aggregator we're looking at 1623 * @lacp_fast: boolean. whether fast periodic should be used 1624 * 1625 */ 1626 static void ad_initialize_port(struct port *port, int lacp_fast) 1627 { 1628 static const struct port_params tmpl = { 1629 .system_priority = 0xffff, 1630 .key = 1, 1631 .port_number = 1, 1632 .port_priority = 0xff, 1633 .port_state = 1, 1634 }; 1635 static const struct lacpdu lacpdu = { 1636 .subtype = 0x01, 1637 .version_number = 0x01, 1638 .tlv_type_actor_info = 0x01, 1639 .actor_information_length = 0x14, 1640 .tlv_type_partner_info = 0x02, 1641 .partner_information_length = 0x14, 1642 .tlv_type_collector_info = 0x03, 1643 .collector_information_length = 0x10, 1644 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1645 }; 1646 1647 if (port) { 1648 port->actor_port_number = 1; 1649 port->actor_port_priority = 0xff; 1650 port->actor_system = null_mac_addr; 1651 port->actor_system_priority = 0xffff; 1652 port->actor_port_aggregator_identifier = 0; 1653 port->ntt = false; 1654 port->actor_admin_port_key = 1; 1655 port->actor_oper_port_key = 1; 1656 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1657 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1658 1659 if (lacp_fast) 1660 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1661 1662 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1663 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1664 1665 port->is_enabled = true; 1666 // ****** private parameters ****** 1667 port->sm_vars = 0x3; 1668 port->sm_rx_state = 0; 1669 port->sm_rx_timer_counter = 0; 1670 port->sm_periodic_state = 0; 1671 port->sm_periodic_timer_counter = 0; 1672 port->sm_mux_state = 0; 1673 port->sm_mux_timer_counter = 0; 1674 port->sm_tx_state = 0; 1675 port->sm_tx_timer_counter = 0; 1676 port->slave = NULL; 1677 port->aggregator = NULL; 1678 port->next_port_in_aggregator = NULL; 1679 port->transaction_id = 0; 1680 1681 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1682 } 1683 } 1684 1685 /** 1686 * ad_enable_collecting_distributing - enable a port's transmit/receive 1687 * @port: the port we're looking at 1688 * 1689 * Enable @port if it's in an active aggregator 1690 */ 1691 static void ad_enable_collecting_distributing(struct port *port) 1692 { 1693 if (port->aggregator->is_active) { 1694 pr_debug("Enabling port %d(LAG %d)\n", 1695 port->actor_port_number, 1696 port->aggregator->aggregator_identifier); 1697 __enable_port(port); 1698 } 1699 } 1700 1701 /** 1702 * ad_disable_collecting_distributing - disable a port's transmit/receive 1703 * @port: the port we're looking at 1704 * 1705 */ 1706 static void ad_disable_collecting_distributing(struct port *port) 1707 { 1708 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { 1709 pr_debug("Disabling port %d(LAG %d)\n", 1710 port->actor_port_number, 1711 port->aggregator->aggregator_identifier); 1712 __disable_port(port); 1713 } 1714 } 1715 1716 #if 0 1717 /** 1718 * ad_marker_info_send - send a marker information frame 1719 * @port: the port we're looking at 1720 * 1721 * This function does nothing since we decided not to implement send and handle 1722 * response for marker PDU's, in this stage, but only to respond to marker 1723 * information. 1724 */ 1725 static void ad_marker_info_send(struct port *port) 1726 { 1727 struct bond_marker marker; 1728 u16 index; 1729 1730 // fill the marker PDU with the appropriate values 1731 marker.subtype = 0x02; 1732 marker.version_number = 0x01; 1733 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; 1734 marker.marker_length = 0x16; 1735 // convert requester_port to Big Endian 1736 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); 1737 marker.requester_system = port->actor_system; 1738 // convert requester_port(u32) to Big Endian 1739 marker.requester_transaction_id = 1740 (((++port->transaction_id & 0xFF) << 24) 1741 | ((port->transaction_id & 0xFF00) << 8) 1742 | ((port->transaction_id & 0xFF0000) >> 8) 1743 | ((port->transaction_id & 0xFF000000) >> 24)); 1744 marker.pad = 0; 1745 marker.tlv_type_terminator = 0x00; 1746 marker.terminator_length = 0x00; 1747 for (index = 0; index < 90; index++) 1748 marker.reserved_90[index] = 0; 1749 1750 // send the marker information 1751 if (ad_marker_send(port, &marker) >= 0) { 1752 pr_debug("Sent Marker Information on port %d\n", 1753 port->actor_port_number); 1754 } 1755 } 1756 #endif 1757 1758 /** 1759 * ad_marker_info_received - handle receive of a Marker information frame 1760 * @marker_info: Marker info received 1761 * @port: the port we're looking at 1762 * 1763 */ 1764 static void ad_marker_info_received(struct bond_marker *marker_info, 1765 struct port *port) 1766 { 1767 struct bond_marker marker; 1768 1769 // copy the received marker data to the response marker 1770 //marker = *marker_info; 1771 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1772 // change the marker subtype to marker response 1773 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1774 // send the marker response 1775 1776 if (ad_marker_send(port, &marker) >= 0) { 1777 pr_debug("Sent Marker Response on port %d\n", 1778 port->actor_port_number); 1779 } 1780 } 1781 1782 /** 1783 * ad_marker_response_received - handle receive of a marker response frame 1784 * @marker: marker PDU received 1785 * @port: the port we're looking at 1786 * 1787 * This function does nothing since we decided not to implement send and handle 1788 * response for marker PDU's, in this stage, but only to respond to marker 1789 * information. 1790 */ 1791 static void ad_marker_response_received(struct bond_marker *marker, 1792 struct port *port) 1793 { 1794 marker = NULL; /* just to satisfy the compiler */ 1795 port = NULL; /* just to satisfy the compiler */ 1796 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW 1797 } 1798 1799 ////////////////////////////////////////////////////////////////////////////////////// 1800 // ================= AD exported functions to the main bonding code ================== 1801 ////////////////////////////////////////////////////////////////////////////////////// 1802 1803 // Check aggregators status in team every T seconds 1804 #define AD_AGGREGATOR_SELECTION_TIMER 8 1805 1806 /* 1807 * bond_3ad_initiate_agg_selection(struct bonding *bond) 1808 * 1809 * Set the aggregation selection timer, to initiate an agg selection in 1810 * the very near future. Called during first initialization, and during 1811 * any down to up transitions of the bond. 1812 */ 1813 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1814 { 1815 BOND_AD_INFO(bond).agg_select_timer = timeout; 1816 } 1817 1818 static u16 aggregator_identifier; 1819 1820 /** 1821 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1822 * @bond: bonding struct to work on 1823 * @tick_resolution: tick duration (millisecond resolution) 1824 * 1825 * Can be called only after the mac address of the bond is set. 1826 */ 1827 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1828 { 1829 // check that the bond is not initialized yet 1830 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1831 bond->dev->dev_addr)) { 1832 1833 aggregator_identifier = 0; 1834 1835 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; 1836 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); 1837 1838 // initialize how many times this module is called in one second(should be about every 100ms) 1839 ad_ticks_per_sec = tick_resolution; 1840 1841 bond_3ad_initiate_agg_selection(bond, 1842 AD_AGGREGATOR_SELECTION_TIMER * 1843 ad_ticks_per_sec); 1844 } 1845 } 1846 1847 /** 1848 * bond_3ad_bind_slave - initialize a slave's port 1849 * @slave: slave struct to work on 1850 * 1851 * Returns: 0 on success 1852 * < 0 on error 1853 */ 1854 int bond_3ad_bind_slave(struct slave *slave) 1855 { 1856 struct bonding *bond = bond_get_bond_by_slave(slave); 1857 struct port *port; 1858 struct aggregator *aggregator; 1859 1860 if (bond == NULL) { 1861 pr_err("%s: The slave %s is not attached to its bond\n", 1862 slave->bond->dev->name, slave->dev->name); 1863 return -1; 1864 } 1865 1866 //check that the slave has not been initialized yet. 1867 if (SLAVE_AD_INFO(slave).port.slave != slave) { 1868 1869 // port initialization 1870 port = &(SLAVE_AD_INFO(slave).port); 1871 1872 ad_initialize_port(port, bond->params.lacp_fast); 1873 1874 __initialize_port_locks(slave); 1875 port->slave = slave; 1876 port->actor_port_number = SLAVE_AD_INFO(slave).id; 1877 // key is determined according to the link speed, duplex and user key(which is yet not supported) 1878 // ------------------------------------------------------------ 1879 // Port key : | User key | Speed |Duplex| 1880 // ------------------------------------------------------------ 1881 // 16 6 1 0 1882 port->actor_admin_port_key = 0; // initialize this parameter 1883 port->actor_admin_port_key |= __get_duplex(port); 1884 port->actor_admin_port_key |= (__get_link_speed(port) << 1); 1885 port->actor_oper_port_key = port->actor_admin_port_key; 1886 // if the port is not full duplex, then the port should be not lacp Enabled 1887 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) 1888 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1889 // actor system is the bond's system 1890 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 1891 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) 1892 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1893 port->aggregator = NULL; 1894 port->next_port_in_aggregator = NULL; 1895 1896 __disable_port(port); 1897 1898 // aggregator initialization 1899 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1900 1901 ad_initialize_agg(aggregator); 1902 1903 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 1904 aggregator->aggregator_identifier = (++aggregator_identifier); 1905 aggregator->slave = slave; 1906 aggregator->is_active = 0; 1907 aggregator->num_of_ports = 0; 1908 } 1909 1910 return 0; 1911 } 1912 1913 /** 1914 * bond_3ad_unbind_slave - deinitialize a slave's port 1915 * @slave: slave struct to work on 1916 * 1917 * Search for the aggregator that is related to this port, remove the 1918 * aggregator and assign another aggregator for other port related to it 1919 * (if any), and remove the port. 1920 */ 1921 void bond_3ad_unbind_slave(struct slave *slave) 1922 { 1923 struct port *port, *prev_port, *temp_port; 1924 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 1925 int select_new_active_agg = 0; 1926 struct bonding *bond = slave->bond; 1927 struct slave *slave_iter; 1928 struct list_head *iter; 1929 1930 // find the aggregator related to this slave 1931 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1932 1933 // find the port related to this slave 1934 port = &(SLAVE_AD_INFO(slave).port); 1935 1936 // if slave is null, the whole port is not initialized 1937 if (!port->slave) { 1938 pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n", 1939 slave->bond->dev->name, slave->dev->name); 1940 return; 1941 } 1942 1943 pr_debug("Unbinding Link Aggregation Group %d\n", 1944 aggregator->aggregator_identifier); 1945 1946 /* Tell the partner that this port is not suitable for aggregation */ 1947 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 1948 __update_lacpdu_from_port(port); 1949 ad_lacpdu_send(port); 1950 1951 // check if this aggregator is occupied 1952 if (aggregator->lag_ports) { 1953 // check if there are other ports related to this aggregator except 1954 // the port related to this slave(thats ensure us that there is a 1955 // reason to search for new aggregator, and that we will find one 1956 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { 1957 // find new aggregator for the related port(s) 1958 bond_for_each_slave(bond, slave_iter, iter) { 1959 new_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator); 1960 // if the new aggregator is empty, or it is connected to our port only 1961 if (!new_aggregator->lag_ports 1962 || ((new_aggregator->lag_ports == port) 1963 && !new_aggregator->lag_ports->next_port_in_aggregator)) 1964 break; 1965 } 1966 if (!slave_iter) 1967 new_aggregator = NULL; 1968 // if new aggregator found, copy the aggregator's parameters 1969 // and connect the related lag_ports to the new aggregator 1970 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 1971 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", 1972 aggregator->aggregator_identifier, 1973 new_aggregator->aggregator_identifier); 1974 1975 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { 1976 pr_info("%s: Removing an active aggregator\n", 1977 aggregator->slave->bond->dev->name); 1978 // select new active aggregator 1979 select_new_active_agg = 1; 1980 } 1981 1982 new_aggregator->is_individual = aggregator->is_individual; 1983 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 1984 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 1985 new_aggregator->partner_system = aggregator->partner_system; 1986 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 1987 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 1988 new_aggregator->receive_state = aggregator->receive_state; 1989 new_aggregator->transmit_state = aggregator->transmit_state; 1990 new_aggregator->lag_ports = aggregator->lag_ports; 1991 new_aggregator->is_active = aggregator->is_active; 1992 new_aggregator->num_of_ports = aggregator->num_of_ports; 1993 1994 // update the information that is written on the ports about the aggregator 1995 for (temp_port = aggregator->lag_ports; temp_port; 1996 temp_port = temp_port->next_port_in_aggregator) { 1997 temp_port->aggregator = new_aggregator; 1998 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 1999 } 2000 2001 // clear the aggregator 2002 ad_clear_agg(aggregator); 2003 2004 if (select_new_active_agg) 2005 ad_agg_selection_logic(__get_first_agg(port)); 2006 } else { 2007 pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n", 2008 slave->bond->dev->name); 2009 } 2010 } else { // in case that the only port related to this aggregator is the one we want to remove 2011 select_new_active_agg = aggregator->is_active; 2012 // clear the aggregator 2013 ad_clear_agg(aggregator); 2014 if (select_new_active_agg) { 2015 pr_info("%s: Removing an active aggregator\n", 2016 slave->bond->dev->name); 2017 // select new active aggregator 2018 temp_aggregator = __get_first_agg(port); 2019 if (temp_aggregator) 2020 ad_agg_selection_logic(temp_aggregator); 2021 } 2022 } 2023 } 2024 2025 pr_debug("Unbinding port %d\n", port->actor_port_number); 2026 // find the aggregator that this port is connected to 2027 bond_for_each_slave(bond, slave_iter, iter) { 2028 temp_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator); 2029 prev_port = NULL; 2030 // search the port in the aggregator's related ports 2031 for (temp_port = temp_aggregator->lag_ports; temp_port; 2032 prev_port = temp_port, 2033 temp_port = temp_port->next_port_in_aggregator) { 2034 if (temp_port == port) { // the aggregator found - detach the port from this aggregator 2035 if (prev_port) 2036 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2037 else 2038 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2039 temp_aggregator->num_of_ports--; 2040 if (temp_aggregator->num_of_ports == 0) { 2041 select_new_active_agg = temp_aggregator->is_active; 2042 // clear the aggregator 2043 ad_clear_agg(temp_aggregator); 2044 if (select_new_active_agg) { 2045 pr_info("%s: Removing an active aggregator\n", 2046 slave->bond->dev->name); 2047 // select new active aggregator 2048 ad_agg_selection_logic(__get_first_agg(port)); 2049 } 2050 } 2051 break; 2052 } 2053 } 2054 } 2055 port->slave = NULL; 2056 } 2057 2058 /** 2059 * bond_3ad_state_machine_handler - handle state machines timeout 2060 * @bond: bonding struct to work on 2061 * 2062 * The state machine handling concept in this module is to check every tick 2063 * which state machine should operate any function. The execution order is 2064 * round robin, so when we have an interaction between state machines, the 2065 * reply of one to each other might be delayed until next tick. 2066 * 2067 * This function also complete the initialization when the agg_select_timer 2068 * times out, and it selects an aggregator for the ports that are yet not 2069 * related to any aggregator, and selects the active aggregator for a bond. 2070 */ 2071 void bond_3ad_state_machine_handler(struct work_struct *work) 2072 { 2073 struct bonding *bond = container_of(work, struct bonding, 2074 ad_work.work); 2075 struct aggregator *aggregator; 2076 struct list_head *iter; 2077 struct slave *slave; 2078 struct port *port; 2079 2080 read_lock(&bond->lock); 2081 rcu_read_lock(); 2082 2083 /* check if there are any slaves */ 2084 if (!bond_has_slaves(bond)) 2085 goto re_arm; 2086 2087 /* check if agg_select_timer timer after initialize is timed out */ 2088 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { 2089 slave = bond_first_slave_rcu(bond); 2090 port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL; 2091 2092 /* select the active aggregator for the bond */ 2093 if (port) { 2094 if (!port->slave) { 2095 pr_warning("%s: Warning: bond's first port is uninitialized\n", 2096 bond->dev->name); 2097 goto re_arm; 2098 } 2099 2100 aggregator = __get_first_agg(port); 2101 ad_agg_selection_logic(aggregator); 2102 } 2103 bond_3ad_set_carrier(bond); 2104 } 2105 2106 /* for each port run the state machines */ 2107 bond_for_each_slave_rcu(bond, slave, iter) { 2108 port = &(SLAVE_AD_INFO(slave).port); 2109 if (!port->slave) { 2110 pr_warning("%s: Warning: Found an uninitialized port\n", 2111 bond->dev->name); 2112 goto re_arm; 2113 } 2114 2115 /* Lock around state machines to protect data accessed 2116 * by all (e.g., port->sm_vars). ad_rx_machine may run 2117 * concurrently due to incoming LACPDU. 2118 */ 2119 __get_state_machine_lock(port); 2120 2121 ad_rx_machine(NULL, port); 2122 ad_periodic_machine(port); 2123 ad_port_selection_logic(port); 2124 ad_mux_machine(port); 2125 ad_tx_machine(port); 2126 2127 /* turn off the BEGIN bit, since we already handled it */ 2128 if (port->sm_vars & AD_PORT_BEGIN) 2129 port->sm_vars &= ~AD_PORT_BEGIN; 2130 2131 __release_state_machine_lock(port); 2132 } 2133 2134 re_arm: 2135 rcu_read_unlock(); 2136 read_unlock(&bond->lock); 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, u16 length) 2151 { 2152 struct port *port; 2153 int ret = RX_HANDLER_ANOTHER; 2154 2155 if (length >= sizeof(struct lacpdu)) { 2156 2157 port = &(SLAVE_AD_INFO(slave).port); 2158 2159 if (!port->slave) { 2160 pr_warning("%s: Warning: port of slave %s is uninitialized\n", 2161 slave->dev->name, slave->bond->dev->name); 2162 return ret; 2163 } 2164 2165 switch (lacpdu->subtype) { 2166 case AD_TYPE_LACPDU: 2167 ret = RX_HANDLER_CONSUMED; 2168 pr_debug("Received LACPDU on port %d\n", 2169 port->actor_port_number); 2170 /* Protect against concurrent state machines */ 2171 __get_state_machine_lock(port); 2172 ad_rx_machine(lacpdu, port); 2173 __release_state_machine_lock(port); 2174 break; 2175 2176 case AD_TYPE_MARKER: 2177 ret = RX_HANDLER_CONSUMED; 2178 // No need to convert fields to Little Endian since we don't use the marker's fields. 2179 2180 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2181 case AD_MARKER_INFORMATION_SUBTYPE: 2182 pr_debug("Received Marker Information on port %d\n", 2183 port->actor_port_number); 2184 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2185 break; 2186 2187 case AD_MARKER_RESPONSE_SUBTYPE: 2188 pr_debug("Received Marker Response on port %d\n", 2189 port->actor_port_number); 2190 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2191 break; 2192 2193 default: 2194 pr_debug("Received an unknown Marker subtype on slot %d\n", 2195 port->actor_port_number); 2196 } 2197 } 2198 } 2199 return ret; 2200 } 2201 2202 /** 2203 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication 2204 * @slave: slave struct to work on 2205 * 2206 * Handle reselection of aggregator (if needed) for this port. 2207 */ 2208 void bond_3ad_adapter_speed_changed(struct slave *slave) 2209 { 2210 struct port *port; 2211 2212 port = &(SLAVE_AD_INFO(slave).port); 2213 2214 // if slave is null, the whole port is not initialized 2215 if (!port->slave) { 2216 pr_warning("Warning: %s: speed changed for uninitialized port on %s\n", 2217 slave->bond->dev->name, slave->dev->name); 2218 return; 2219 } 2220 2221 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2222 port->actor_oper_port_key = port->actor_admin_port_key |= 2223 (__get_link_speed(port) << 1); 2224 pr_debug("Port %d changed speed\n", port->actor_port_number); 2225 // there is no need to reselect a new aggregator, just signal the 2226 // state machines to reinitialize 2227 port->sm_vars |= AD_PORT_BEGIN; 2228 } 2229 2230 /** 2231 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication 2232 * @slave: slave struct to work on 2233 * 2234 * Handle reselection of aggregator (if needed) for this port. 2235 */ 2236 void bond_3ad_adapter_duplex_changed(struct slave *slave) 2237 { 2238 struct port *port; 2239 2240 port = &(SLAVE_AD_INFO(slave).port); 2241 2242 // if slave is null, the whole port is not initialized 2243 if (!port->slave) { 2244 pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n", 2245 slave->bond->dev->name, slave->dev->name); 2246 return; 2247 } 2248 2249 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2250 port->actor_oper_port_key = port->actor_admin_port_key |= 2251 __get_duplex(port); 2252 pr_debug("Port %d changed duplex\n", port->actor_port_number); 2253 // there is no need to reselect a new aggregator, just signal the 2254 // state machines to reinitialize 2255 port->sm_vars |= AD_PORT_BEGIN; 2256 } 2257 2258 /** 2259 * bond_3ad_handle_link_change - handle a slave's link status change indication 2260 * @slave: slave struct to work on 2261 * @status: whether the link is now up or down 2262 * 2263 * Handle reselection of aggregator (if needed) for this port. 2264 */ 2265 void bond_3ad_handle_link_change(struct slave *slave, char link) 2266 { 2267 struct port *port; 2268 2269 port = &(SLAVE_AD_INFO(slave).port); 2270 2271 // if slave is null, the whole port is not initialized 2272 if (!port->slave) { 2273 pr_warning("Warning: %s: link status changed for uninitialized port on %s\n", 2274 slave->bond->dev->name, slave->dev->name); 2275 return; 2276 } 2277 2278 // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed) 2279 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report 2280 if (link == BOND_LINK_UP) { 2281 port->is_enabled = true; 2282 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2283 port->actor_oper_port_key = port->actor_admin_port_key |= 2284 __get_duplex(port); 2285 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2286 port->actor_oper_port_key = port->actor_admin_port_key |= 2287 (__get_link_speed(port) << 1); 2288 } else { 2289 /* link has failed */ 2290 port->is_enabled = false; 2291 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2292 port->actor_oper_port_key = (port->actor_admin_port_key &= 2293 ~AD_SPEED_KEY_BITS); 2294 } 2295 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); 2296 // there is no need to reselect a new aggregator, just signal the 2297 // state machines to reinitialize 2298 port->sm_vars |= AD_PORT_BEGIN; 2299 } 2300 2301 /* 2302 * set link state for bonding master: if we have an active 2303 * aggregator, we're up, if not, we're down. Presumes that we cannot 2304 * have an active aggregator if there are no slaves with link up. 2305 * 2306 * This behavior complies with IEEE 802.3 section 43.3.9. 2307 * 2308 * Called by bond_set_carrier(). Return zero if carrier state does not 2309 * change, nonzero if it does. 2310 */ 2311 int bond_3ad_set_carrier(struct bonding *bond) 2312 { 2313 struct aggregator *active; 2314 struct slave *first_slave; 2315 2316 rcu_read_lock(); 2317 first_slave = bond_first_slave_rcu(bond); 2318 rcu_read_unlock(); 2319 if (!first_slave) 2320 return 0; 2321 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator)); 2322 if (active) { 2323 /* are enough slaves available to consider link up? */ 2324 if (active->num_of_ports < bond->params.min_links) { 2325 if (netif_carrier_ok(bond->dev)) { 2326 netif_carrier_off(bond->dev); 2327 return 1; 2328 } 2329 } else if (!netif_carrier_ok(bond->dev)) { 2330 netif_carrier_on(bond->dev); 2331 return 1; 2332 } 2333 return 0; 2334 } 2335 2336 if (netif_carrier_ok(bond->dev)) { 2337 netif_carrier_off(bond->dev); 2338 return 1; 2339 } 2340 return 0; 2341 } 2342 2343 /** 2344 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2345 * @bond: bonding struct to work on 2346 * @ad_info: ad_info struct to fill with the bond's info 2347 * 2348 * Returns: 0 on success 2349 * < 0 on error 2350 */ 2351 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2352 struct ad_info *ad_info) 2353 { 2354 struct aggregator *aggregator = NULL; 2355 struct list_head *iter; 2356 struct slave *slave; 2357 struct port *port; 2358 2359 bond_for_each_slave_rcu(bond, slave, iter) { 2360 port = &(SLAVE_AD_INFO(slave).port); 2361 if (port->aggregator && port->aggregator->is_active) { 2362 aggregator = port->aggregator; 2363 break; 2364 } 2365 } 2366 2367 if (aggregator) { 2368 ad_info->aggregator_id = aggregator->aggregator_identifier; 2369 ad_info->ports = aggregator->num_of_ports; 2370 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2371 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2372 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); 2373 return 0; 2374 } 2375 2376 return -1; 2377 } 2378 2379 /* Wrapper used to hold bond->lock so no slave manipulation can occur */ 2380 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2381 { 2382 int ret; 2383 2384 rcu_read_lock(); 2385 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2386 rcu_read_unlock(); 2387 2388 return ret; 2389 } 2390 2391 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) 2392 { 2393 struct bonding *bond = netdev_priv(dev); 2394 struct slave *slave, *first_ok_slave; 2395 struct aggregator *agg; 2396 struct ad_info ad_info; 2397 struct list_head *iter; 2398 int slaves_in_agg; 2399 int slave_agg_no; 2400 int res = 1; 2401 int agg_id; 2402 2403 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { 2404 pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n", 2405 dev->name); 2406 goto out; 2407 } 2408 2409 slaves_in_agg = ad_info.ports; 2410 agg_id = ad_info.aggregator_id; 2411 2412 if (slaves_in_agg == 0) { 2413 pr_debug("%s: Error: active aggregator is empty\n", dev->name); 2414 goto out; 2415 } 2416 2417 slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg); 2418 first_ok_slave = NULL; 2419 2420 bond_for_each_slave_rcu(bond, slave, iter) { 2421 agg = SLAVE_AD_INFO(slave).port.aggregator; 2422 if (!agg || agg->aggregator_identifier != agg_id) 2423 continue; 2424 2425 if (slave_agg_no >= 0) { 2426 if (!first_ok_slave && SLAVE_IS_OK(slave)) 2427 first_ok_slave = slave; 2428 slave_agg_no--; 2429 continue; 2430 } 2431 2432 if (SLAVE_IS_OK(slave)) { 2433 res = bond_dev_queue_xmit(bond, skb, slave->dev); 2434 goto out; 2435 } 2436 } 2437 2438 if (slave_agg_no >= 0) { 2439 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n", 2440 dev->name, agg_id); 2441 goto out; 2442 } 2443 2444 /* we couldn't find any suitable slave after the agg_no, so use the 2445 * first suitable found, if found. */ 2446 if (first_ok_slave) 2447 res = bond_dev_queue_xmit(bond, skb, first_ok_slave->dev); 2448 2449 out: 2450 if (res) { 2451 /* no suitable interface, frame not sent */ 2452 kfree_skb(skb); 2453 } 2454 2455 return NETDEV_TX_OK; 2456 } 2457 2458 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2459 struct slave *slave) 2460 { 2461 int ret = RX_HANDLER_ANOTHER; 2462 struct lacpdu *lacpdu, _lacpdu; 2463 2464 if (skb->protocol != PKT_TYPE_LACPDU) 2465 return ret; 2466 2467 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2468 if (!lacpdu) 2469 return ret; 2470 2471 read_lock(&bond->lock); 2472 ret = bond_3ad_rx_indication(lacpdu, slave, skb->len); 2473 read_unlock(&bond->lock); 2474 return ret; 2475 } 2476 2477 /* 2478 * When modify lacp_rate parameter via sysfs, 2479 * update actor_oper_port_state of each port. 2480 * 2481 * Hold slave->state_machine_lock, 2482 * so we can modify port->actor_oper_port_state, 2483 * no matter bond is up or down. 2484 */ 2485 void bond_3ad_update_lacp_rate(struct bonding *bond) 2486 { 2487 struct port *port = NULL; 2488 struct list_head *iter; 2489 struct slave *slave; 2490 int lacp_fast; 2491 2492 lacp_fast = bond->params.lacp_fast; 2493 bond_for_each_slave(bond, slave, iter) { 2494 port = &(SLAVE_AD_INFO(slave).port); 2495 __get_state_machine_lock(port); 2496 if (lacp_fast) 2497 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2498 else 2499 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2500 __release_state_machine_lock(port); 2501 } 2502 } 2503