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_port - get the first port in the bond 140 * @bond: the bond we're looking at 141 * 142 * Return the port of the first slave in @bond, or %NULL if it can't be found. 143 */ 144 static inline struct port *__get_first_port(struct bonding *bond) 145 { 146 struct slave *first_slave = bond_first_slave(bond); 147 148 return first_slave ? &(SLAVE_AD_INFO(first_slave).port) : NULL; 149 } 150 151 /** 152 * __get_next_port - get the next port in the bond 153 * @port: the port we're looking at 154 * 155 * Return the port of the slave that is next in line of @port's slave in the 156 * bond, or %NULL if it can't be found. 157 */ 158 static inline struct port *__get_next_port(struct port *port) 159 { 160 struct bonding *bond = __get_bond_by_port(port); 161 struct slave *slave = port->slave, *slave_next; 162 163 // If there's no bond for this port, or this is the last slave 164 if (bond == NULL) 165 return NULL; 166 slave_next = bond_next_slave(bond, slave); 167 if (!slave_next || bond_is_first_slave(bond, slave_next)) 168 return NULL; 169 170 return &(SLAVE_AD_INFO(slave_next).port); 171 } 172 173 /** 174 * __get_first_agg - get the first aggregator in the bond 175 * @bond: the bond we're looking at 176 * 177 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 178 * found. 179 */ 180 static inline struct aggregator *__get_first_agg(struct port *port) 181 { 182 struct bonding *bond = __get_bond_by_port(port); 183 struct slave *first_slave; 184 185 // If there's no bond for this port, or bond has no slaves 186 if (bond == NULL) 187 return NULL; 188 first_slave = bond_first_slave(bond); 189 190 return first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL; 191 } 192 193 /** 194 * __get_next_agg - get the next aggregator in the bond 195 * @aggregator: the aggregator we're looking at 196 * 197 * Return the aggregator of the slave that is next in line of @aggregator's 198 * slave in the bond, or %NULL if it can't be found. 199 */ 200 static inline struct aggregator *__get_next_agg(struct aggregator *aggregator) 201 { 202 struct slave *slave = aggregator->slave, *slave_next; 203 struct bonding *bond = bond_get_bond_by_slave(slave); 204 205 // If there's no bond for this aggregator, or this is the last slave 206 if (bond == NULL) 207 return NULL; 208 slave_next = bond_next_slave(bond, slave); 209 if (!slave_next || bond_is_first_slave(bond, slave_next)) 210 return NULL; 211 212 return &(SLAVE_AD_INFO(slave_next).aggregator); 213 } 214 215 /* 216 * __agg_has_partner 217 * 218 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 219 * address for the partner). Return 0 if not. 220 */ 221 static inline int __agg_has_partner(struct aggregator *agg) 222 { 223 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 224 } 225 226 /** 227 * __disable_port - disable the port's slave 228 * @port: the port we're looking at 229 * 230 */ 231 static inline void __disable_port(struct port *port) 232 { 233 bond_set_slave_inactive_flags(port->slave); 234 } 235 236 /** 237 * __enable_port - enable the port's slave, if it's up 238 * @port: the port we're looking at 239 * 240 */ 241 static inline void __enable_port(struct port *port) 242 { 243 struct slave *slave = port->slave; 244 245 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) 246 bond_set_slave_active_flags(slave); 247 } 248 249 /** 250 * __port_is_enabled - check if the port's slave is in active state 251 * @port: the port we're looking at 252 * 253 */ 254 static inline int __port_is_enabled(struct port *port) 255 { 256 return bond_is_active_slave(port->slave); 257 } 258 259 /** 260 * __get_agg_selection_mode - get the aggregator selection mode 261 * @port: the port we're looking at 262 * 263 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 264 */ 265 static inline u32 __get_agg_selection_mode(struct port *port) 266 { 267 struct bonding *bond = __get_bond_by_port(port); 268 269 if (bond == NULL) 270 return BOND_AD_STABLE; 271 272 return bond->params.ad_select; 273 } 274 275 /** 276 * __check_agg_selection_timer - check if the selection timer has expired 277 * @port: the port we're looking at 278 * 279 */ 280 static inline int __check_agg_selection_timer(struct port *port) 281 { 282 struct bonding *bond = __get_bond_by_port(port); 283 284 if (bond == NULL) 285 return 0; 286 287 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 288 } 289 290 /** 291 * __get_state_machine_lock - lock the port's state machines 292 * @port: the port we're looking at 293 * 294 */ 295 static inline void __get_state_machine_lock(struct port *port) 296 { 297 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); 298 } 299 300 /** 301 * __release_state_machine_lock - unlock the port's state machines 302 * @port: the port we're looking at 303 * 304 */ 305 static inline void __release_state_machine_lock(struct port *port) 306 { 307 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); 308 } 309 310 /** 311 * __get_link_speed - get a port's speed 312 * @port: the port we're looking at 313 * 314 * Return @port's speed in 802.3ad bitmask format. i.e. one of: 315 * 0, 316 * %AD_LINK_SPEED_BITMASK_10MBPS, 317 * %AD_LINK_SPEED_BITMASK_100MBPS, 318 * %AD_LINK_SPEED_BITMASK_1000MBPS, 319 * %AD_LINK_SPEED_BITMASK_10000MBPS 320 */ 321 static u16 __get_link_speed(struct port *port) 322 { 323 struct slave *slave = port->slave; 324 u16 speed; 325 326 /* this if covers only a special case: when the configuration starts with 327 * link down, it sets the speed to 0. 328 * This is done in spite of the fact that the e100 driver reports 0 to be 329 * compatible with MVT in the future.*/ 330 if (slave->link != BOND_LINK_UP) 331 speed = 0; 332 else { 333 switch (slave->speed) { 334 case SPEED_10: 335 speed = AD_LINK_SPEED_BITMASK_10MBPS; 336 break; 337 338 case SPEED_100: 339 speed = AD_LINK_SPEED_BITMASK_100MBPS; 340 break; 341 342 case SPEED_1000: 343 speed = AD_LINK_SPEED_BITMASK_1000MBPS; 344 break; 345 346 case SPEED_10000: 347 speed = AD_LINK_SPEED_BITMASK_10000MBPS; 348 break; 349 350 default: 351 speed = 0; // unknown speed value from ethtool. shouldn't happen 352 break; 353 } 354 } 355 356 pr_debug("Port %d Received link speed %d update from adapter\n", 357 port->actor_port_number, speed); 358 return speed; 359 } 360 361 /** 362 * __get_duplex - get a port's duplex 363 * @port: the port we're looking at 364 * 365 * Return @port's duplex in 802.3ad bitmask format. i.e.: 366 * 0x01 if in full duplex 367 * 0x00 otherwise 368 */ 369 static u8 __get_duplex(struct port *port) 370 { 371 struct slave *slave = port->slave; 372 373 u8 retval; 374 375 // handling a special case: when the configuration starts with 376 // link down, it sets the duplex to 0. 377 if (slave->link != BOND_LINK_UP) 378 retval = 0x0; 379 else { 380 switch (slave->duplex) { 381 case DUPLEX_FULL: 382 retval = 0x1; 383 pr_debug("Port %d Received status full duplex update from adapter\n", 384 port->actor_port_number); 385 break; 386 case DUPLEX_HALF: 387 default: 388 retval = 0x0; 389 pr_debug("Port %d Received status NOT full duplex update from adapter\n", 390 port->actor_port_number); 391 break; 392 } 393 } 394 return retval; 395 } 396 397 /** 398 * __initialize_port_locks - initialize a port's STATE machine spinlock 399 * @port: the slave of the port we're looking at 400 * 401 */ 402 static inline void __initialize_port_locks(struct slave *slave) 403 { 404 // make sure it isn't called twice 405 spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock)); 406 } 407 408 //conversions 409 410 /** 411 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 412 * @timer_type: which timer to operate 413 * @par: timer parameter. see below 414 * 415 * If @timer_type is %current_while_timer, @par indicates long/short timer. 416 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 417 * %SLOW_PERIODIC_TIME. 418 */ 419 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 420 { 421 u16 retval = 0; /* to silence the compiler */ 422 423 switch (timer_type) { 424 case AD_CURRENT_WHILE_TIMER: // for rx machine usage 425 if (par) 426 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout 427 else 428 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout 429 break; 430 case AD_ACTOR_CHURN_TIMER: // for local churn machine 431 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 432 break; 433 case AD_PERIODIC_TIMER: // for periodic machine 434 retval = (par*ad_ticks_per_sec); // long timeout 435 break; 436 case AD_PARTNER_CHURN_TIMER: // for remote churn machine 437 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 438 break; 439 case AD_WAIT_WHILE_TIMER: // for selection machine 440 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 441 break; 442 } 443 return retval; 444 } 445 446 447 ///////////////////////////////////////////////////////////////////////////////// 448 // ================= ad_rx_machine helper functions ================== 449 ///////////////////////////////////////////////////////////////////////////////// 450 451 /** 452 * __choose_matched - update a port's matched variable from a received lacpdu 453 * @lacpdu: the lacpdu we've received 454 * @port: the port we're looking at 455 * 456 * Update the value of the matched variable, using parameter values from a 457 * newly received lacpdu. Parameter values for the partner carried in the 458 * received PDU are compared with the corresponding operational parameter 459 * values for the actor. Matched is set to TRUE if all of these parameters 460 * match and the PDU parameter partner_state.aggregation has the same value as 461 * actor_oper_port_state.aggregation and lacp will actively maintain the link 462 * in the aggregation. Matched is also set to TRUE if the value of 463 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 464 * an individual link and lacp will actively maintain the link. Otherwise, 465 * matched is set to FALSE. LACP is considered to be actively maintaining the 466 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 467 * the actor's actor_oper_port_state.lacp_activity and the PDU's 468 * partner_state.lacp_activity variables are TRUE. 469 * 470 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 471 * used here to implement the language from 802.3ad 43.4.9 that requires 472 * recordPDU to "match" the LACPDU parameters to the stored values. 473 */ 474 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 475 { 476 // check if all parameters are alike 477 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 478 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 479 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && 480 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 481 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 482 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 483 // or this is individual link(aggregation == FALSE) 484 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 485 ) { 486 // update the state machine Matched variable 487 port->sm_vars |= AD_PORT_MATCHED; 488 } else { 489 port->sm_vars &= ~AD_PORT_MATCHED; 490 } 491 } 492 493 /** 494 * __record_pdu - record parameters from a received lacpdu 495 * @lacpdu: the lacpdu we've received 496 * @port: the port we're looking at 497 * 498 * Record the parameter values for the Actor carried in a received lacpdu as 499 * the current partner operational parameter values and sets 500 * actor_oper_port_state.defaulted to FALSE. 501 */ 502 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 503 { 504 if (lacpdu && port) { 505 struct port_params *partner = &port->partner_oper; 506 507 __choose_matched(lacpdu, port); 508 // record the new parameter values for the partner operational 509 partner->port_number = ntohs(lacpdu->actor_port); 510 partner->port_priority = ntohs(lacpdu->actor_port_priority); 511 partner->system = lacpdu->actor_system; 512 partner->system_priority = ntohs(lacpdu->actor_system_priority); 513 partner->key = ntohs(lacpdu->actor_key); 514 partner->port_state = lacpdu->actor_state; 515 516 // set actor_oper_port_state.defaulted to FALSE 517 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 518 519 // set the partner sync. to on if the partner is sync. and the port is matched 520 if ((port->sm_vars & AD_PORT_MATCHED) 521 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) 522 partner->port_state |= AD_STATE_SYNCHRONIZATION; 523 else 524 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 525 } 526 } 527 528 /** 529 * __record_default - record default parameters 530 * @port: the port we're looking at 531 * 532 * This function records the default parameter values for the partner carried 533 * in the Partner Admin parameters as the current partner operational parameter 534 * values and sets actor_oper_port_state.defaulted to TRUE. 535 */ 536 static void __record_default(struct port *port) 537 { 538 if (port) { 539 // record the partner admin parameters 540 memcpy(&port->partner_oper, &port->partner_admin, 541 sizeof(struct port_params)); 542 543 // set actor_oper_port_state.defaulted to true 544 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 545 } 546 } 547 548 /** 549 * __update_selected - update a port's Selected variable from a received lacpdu 550 * @lacpdu: the lacpdu we've received 551 * @port: the port we're looking at 552 * 553 * Update the value of the selected variable, using parameter values from a 554 * newly received lacpdu. The parameter values for the Actor carried in the 555 * received PDU are compared with the corresponding operational parameter 556 * values for the ports partner. If one or more of the comparisons shows that 557 * the value(s) received in the PDU differ from the current operational values, 558 * then selected is set to FALSE and actor_oper_port_state.synchronization is 559 * set to out_of_sync. Otherwise, selected remains unchanged. 560 */ 561 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 562 { 563 if (lacpdu && port) { 564 const struct port_params *partner = &port->partner_oper; 565 566 // check if any parameter is different 567 if (ntohs(lacpdu->actor_port) != partner->port_number || 568 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 569 MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) || 570 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 571 ntohs(lacpdu->actor_key) != partner->key || 572 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 573 // update the state machine Selected variable 574 port->sm_vars &= ~AD_PORT_SELECTED; 575 } 576 } 577 } 578 579 /** 580 * __update_default_selected - update a port's Selected variable from Partner 581 * @port: the port we're looking at 582 * 583 * This function updates the value of the selected variable, using the partner 584 * administrative parameter values. The administrative values are compared with 585 * the corresponding operational parameter values for the partner. If one or 586 * more of the comparisons shows that the administrative value(s) differ from 587 * the current operational values, then Selected is set to FALSE and 588 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 589 * Selected remains unchanged. 590 */ 591 static void __update_default_selected(struct port *port) 592 { 593 if (port) { 594 const struct port_params *admin = &port->partner_admin; 595 const struct port_params *oper = &port->partner_oper; 596 597 // check if any parameter is different 598 if (admin->port_number != oper->port_number || 599 admin->port_priority != oper->port_priority || 600 MAC_ADDRESS_COMPARE(&admin->system, &oper->system) || 601 admin->system_priority != oper->system_priority || 602 admin->key != oper->key || 603 (admin->port_state & AD_STATE_AGGREGATION) 604 != (oper->port_state & AD_STATE_AGGREGATION)) { 605 // update the state machine Selected variable 606 port->sm_vars &= ~AD_PORT_SELECTED; 607 } 608 } 609 } 610 611 /** 612 * __update_ntt - update a port's ntt variable from a received lacpdu 613 * @lacpdu: the lacpdu we've received 614 * @port: the port we're looking at 615 * 616 * Updates the value of the ntt variable, using parameter values from a newly 617 * received lacpdu. The parameter values for the partner carried in the 618 * received PDU are compared with the corresponding operational parameter 619 * values for the Actor. If one or more of the comparisons shows that the 620 * value(s) received in the PDU differ from the current operational values, 621 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 622 */ 623 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 624 { 625 // validate lacpdu and port 626 if (lacpdu && port) { 627 // check if any parameter is different 628 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 629 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 630 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || 631 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 632 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 633 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 634 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 635 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 636 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 637 ) { 638 639 port->ntt = true; 640 } 641 } 642 } 643 644 /** 645 * __attach_bond_to_agg 646 * @port: the port we're looking at 647 * 648 * Handle the attaching of the port's control parser/multiplexer and the 649 * aggregator. This function does nothing since the parser/multiplexer of the 650 * receive and the parser/multiplexer of the aggregator are already combined. 651 */ 652 static void __attach_bond_to_agg(struct port *port) 653 { 654 port = NULL; /* just to satisfy the compiler */ 655 // This function does nothing since the parser/multiplexer of the receive 656 // and the parser/multiplexer of the aggregator are already combined 657 } 658 659 /** 660 * __detach_bond_from_agg 661 * @port: the port we're looking at 662 * 663 * Handle the detaching of the port's control parser/multiplexer from the 664 * aggregator. This function does nothing since the parser/multiplexer of the 665 * receive and the parser/multiplexer of the aggregator are already combined. 666 */ 667 static void __detach_bond_from_agg(struct port *port) 668 { 669 port = NULL; /* just to satisfy the compiler */ 670 // This function does nothing since the parser/multiplexer of the receive 671 // and the parser/multiplexer of the aggregator are already combined 672 } 673 674 /** 675 * __agg_ports_are_ready - check if all ports in an aggregator are ready 676 * @aggregator: the aggregator we're looking at 677 * 678 */ 679 static int __agg_ports_are_ready(struct aggregator *aggregator) 680 { 681 struct port *port; 682 int retval = 1; 683 684 if (aggregator) { 685 // scan all ports in this aggregator to verfy if they are all ready 686 for (port = aggregator->lag_ports; 687 port; 688 port = port->next_port_in_aggregator) { 689 if (!(port->sm_vars & AD_PORT_READY_N)) { 690 retval = 0; 691 break; 692 } 693 } 694 } 695 696 return retval; 697 } 698 699 /** 700 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 701 * @aggregator: the aggregator we're looking at 702 * @val: Should the ports' ready bit be set on or off 703 * 704 */ 705 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 706 { 707 struct port *port; 708 709 for (port = aggregator->lag_ports; port; 710 port = port->next_port_in_aggregator) { 711 if (val) 712 port->sm_vars |= AD_PORT_READY; 713 else 714 port->sm_vars &= ~AD_PORT_READY; 715 } 716 } 717 718 /** 719 * __get_agg_bandwidth - get the total bandwidth of an aggregator 720 * @aggregator: the aggregator we're looking at 721 * 722 */ 723 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 724 { 725 u32 bandwidth = 0; 726 727 if (aggregator->num_of_ports) { 728 switch (__get_link_speed(aggregator->lag_ports)) { 729 case AD_LINK_SPEED_BITMASK_1MBPS: 730 bandwidth = aggregator->num_of_ports; 731 break; 732 case AD_LINK_SPEED_BITMASK_10MBPS: 733 bandwidth = aggregator->num_of_ports * 10; 734 break; 735 case AD_LINK_SPEED_BITMASK_100MBPS: 736 bandwidth = aggregator->num_of_ports * 100; 737 break; 738 case AD_LINK_SPEED_BITMASK_1000MBPS: 739 bandwidth = aggregator->num_of_ports * 1000; 740 break; 741 case AD_LINK_SPEED_BITMASK_10000MBPS: 742 bandwidth = aggregator->num_of_ports * 10000; 743 break; 744 default: 745 bandwidth = 0; /*to silence the compiler ....*/ 746 } 747 } 748 return bandwidth; 749 } 750 751 /** 752 * __get_active_agg - get the current active aggregator 753 * @aggregator: the aggregator we're looking at 754 * 755 */ 756 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 757 { 758 struct aggregator *retval = NULL; 759 760 for (; aggregator; aggregator = __get_next_agg(aggregator)) { 761 if (aggregator->is_active) { 762 retval = aggregator; 763 break; 764 } 765 } 766 767 return retval; 768 } 769 770 /** 771 * __update_lacpdu_from_port - update a port's lacpdu fields 772 * @port: the port we're looking at 773 * 774 */ 775 static inline void __update_lacpdu_from_port(struct port *port) 776 { 777 struct lacpdu *lacpdu = &port->lacpdu; 778 const struct port_params *partner = &port->partner_oper; 779 780 /* update current actual Actor parameters */ 781 /* lacpdu->subtype initialized 782 * lacpdu->version_number initialized 783 * lacpdu->tlv_type_actor_info initialized 784 * lacpdu->actor_information_length initialized 785 */ 786 787 lacpdu->actor_system_priority = htons(port->actor_system_priority); 788 lacpdu->actor_system = port->actor_system; 789 lacpdu->actor_key = htons(port->actor_oper_port_key); 790 lacpdu->actor_port_priority = htons(port->actor_port_priority); 791 lacpdu->actor_port = htons(port->actor_port_number); 792 lacpdu->actor_state = port->actor_oper_port_state; 793 794 /* lacpdu->reserved_3_1 initialized 795 * lacpdu->tlv_type_partner_info initialized 796 * lacpdu->partner_information_length initialized 797 */ 798 799 lacpdu->partner_system_priority = htons(partner->system_priority); 800 lacpdu->partner_system = partner->system; 801 lacpdu->partner_key = htons(partner->key); 802 lacpdu->partner_port_priority = htons(partner->port_priority); 803 lacpdu->partner_port = htons(partner->port_number); 804 lacpdu->partner_state = partner->port_state; 805 806 /* lacpdu->reserved_3_2 initialized 807 * lacpdu->tlv_type_collector_info initialized 808 * lacpdu->collector_information_length initialized 809 * collector_max_delay initialized 810 * reserved_12[12] initialized 811 * tlv_type_terminator initialized 812 * terminator_length initialized 813 * reserved_50[50] initialized 814 */ 815 } 816 817 ////////////////////////////////////////////////////////////////////////////////////// 818 // ================= main 802.3ad protocol code ====================================== 819 ////////////////////////////////////////////////////////////////////////////////////// 820 821 /** 822 * ad_lacpdu_send - send out a lacpdu packet on a given port 823 * @port: the port we're looking at 824 * 825 * Returns: 0 on success 826 * < 0 on error 827 */ 828 static int ad_lacpdu_send(struct port *port) 829 { 830 struct slave *slave = port->slave; 831 struct sk_buff *skb; 832 struct lacpdu_header *lacpdu_header; 833 int length = sizeof(struct lacpdu_header); 834 835 skb = dev_alloc_skb(length); 836 if (!skb) 837 return -ENOMEM; 838 839 skb->dev = slave->dev; 840 skb_reset_mac_header(skb); 841 skb->network_header = skb->mac_header + ETH_HLEN; 842 skb->protocol = PKT_TYPE_LACPDU; 843 skb->priority = TC_PRIO_CONTROL; 844 845 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 846 847 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); 848 /* Note: source address is set to be the member's PERMANENT address, 849 because we use it to identify loopback lacpdus in receive. */ 850 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); 851 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 852 853 lacpdu_header->lacpdu = port->lacpdu; // struct copy 854 855 dev_queue_xmit(skb); 856 857 return 0; 858 } 859 860 /** 861 * ad_marker_send - send marker information/response on a given port 862 * @port: the port we're looking at 863 * @marker: marker data to send 864 * 865 * Returns: 0 on success 866 * < 0 on error 867 */ 868 static int ad_marker_send(struct port *port, struct bond_marker *marker) 869 { 870 struct slave *slave = port->slave; 871 struct sk_buff *skb; 872 struct bond_marker_header *marker_header; 873 int length = sizeof(struct bond_marker_header); 874 875 skb = dev_alloc_skb(length + 16); 876 if (!skb) 877 return -ENOMEM; 878 879 skb_reserve(skb, 16); 880 881 skb->dev = slave->dev; 882 skb_reset_mac_header(skb); 883 skb->network_header = skb->mac_header + ETH_HLEN; 884 skb->protocol = PKT_TYPE_LACPDU; 885 886 marker_header = (struct bond_marker_header *)skb_put(skb, length); 887 888 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); 889 /* Note: source address is set to be the member's PERMANENT address, 890 because we use it to identify loopback MARKERs in receive. */ 891 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); 892 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 893 894 marker_header->marker = *marker; // struct copy 895 896 dev_queue_xmit(skb); 897 898 return 0; 899 } 900 901 /** 902 * ad_mux_machine - handle a port's mux state machine 903 * @port: the port we're looking at 904 * 905 */ 906 static void ad_mux_machine(struct port *port) 907 { 908 mux_states_t last_state; 909 910 // keep current State Machine state to compare later if it was changed 911 last_state = port->sm_mux_state; 912 913 if (port->sm_vars & AD_PORT_BEGIN) { 914 port->sm_mux_state = AD_MUX_DETACHED; // next state 915 } else { 916 switch (port->sm_mux_state) { 917 case AD_MUX_DETACHED: 918 if ((port->sm_vars & AD_PORT_SELECTED) 919 || (port->sm_vars & AD_PORT_STANDBY)) 920 /* if SELECTED or STANDBY */ 921 port->sm_mux_state = AD_MUX_WAITING; // next state 922 break; 923 case AD_MUX_WAITING: 924 // if SELECTED == FALSE return to DETACH state 925 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED 926 port->sm_vars &= ~AD_PORT_READY_N; 927 // in order to withhold the Selection Logic to check all ports READY_N value 928 // every callback cycle to update ready variable, we check READY_N and update READY here 929 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 930 port->sm_mux_state = AD_MUX_DETACHED; // next state 931 break; 932 } 933 934 // check if the wait_while_timer expired 935 if (port->sm_mux_timer_counter 936 && !(--port->sm_mux_timer_counter)) 937 port->sm_vars |= AD_PORT_READY_N; 938 939 // in order to withhold the selection logic to check all ports READY_N value 940 // every callback cycle to update ready variable, we check READY_N and update READY here 941 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 942 943 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state 944 if ((port->sm_vars & AD_PORT_READY) 945 && !port->sm_mux_timer_counter) 946 port->sm_mux_state = AD_MUX_ATTACHED; // next state 947 break; 948 case AD_MUX_ATTACHED: 949 // check also if agg_select_timer expired(so the edable port will take place only after this timer) 950 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { 951 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state 952 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY 953 port->sm_vars &= ~AD_PORT_READY_N; 954 // in order to withhold the selection logic to check all ports READY_N value 955 // every callback cycle to update ready variable, we check READY_N and update READY here 956 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 957 port->sm_mux_state = AD_MUX_DETACHED;// next state 958 } 959 break; 960 case AD_MUX_COLLECTING_DISTRIBUTING: 961 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || 962 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) 963 ) { 964 port->sm_mux_state = AD_MUX_ATTACHED;// next state 965 966 } else { 967 // if port state hasn't changed make 968 // sure that a collecting distributing 969 // port in an active aggregator is enabled 970 if (port->aggregator && 971 port->aggregator->is_active && 972 !__port_is_enabled(port)) { 973 974 __enable_port(port); 975 } 976 } 977 break; 978 default: //to silence the compiler 979 break; 980 } 981 } 982 983 // check if the state machine was changed 984 if (port->sm_mux_state != last_state) { 985 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", 986 port->actor_port_number, last_state, 987 port->sm_mux_state); 988 switch (port->sm_mux_state) { 989 case AD_MUX_DETACHED: 990 __detach_bond_from_agg(port); 991 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 992 ad_disable_collecting_distributing(port); 993 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 994 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 995 port->ntt = true; 996 break; 997 case AD_MUX_WAITING: 998 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 999 break; 1000 case AD_MUX_ATTACHED: 1001 __attach_bond_to_agg(port); 1002 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 1003 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1004 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1005 ad_disable_collecting_distributing(port); 1006 port->ntt = true; 1007 break; 1008 case AD_MUX_COLLECTING_DISTRIBUTING: 1009 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1010 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1011 ad_enable_collecting_distributing(port); 1012 port->ntt = true; 1013 break; 1014 default: //to silence the compiler 1015 break; 1016 } 1017 } 1018 } 1019 1020 /** 1021 * ad_rx_machine - handle a port's rx State Machine 1022 * @lacpdu: the lacpdu we've received 1023 * @port: the port we're looking at 1024 * 1025 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1026 * CURRENT. If timer expired set the state machine in the proper state. 1027 * In other cases, this function checks if we need to switch to other state. 1028 */ 1029 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1030 { 1031 rx_states_t last_state; 1032 1033 // keep current State Machine state to compare later if it was changed 1034 last_state = port->sm_rx_state; 1035 1036 // check if state machine should change state 1037 // first, check if port was reinitialized 1038 if (port->sm_vars & AD_PORT_BEGIN) 1039 /* next state */ 1040 port->sm_rx_state = AD_RX_INITIALIZE; 1041 // check if port is not enabled 1042 else if (!(port->sm_vars & AD_PORT_BEGIN) 1043 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) 1044 /* next state */ 1045 port->sm_rx_state = AD_RX_PORT_DISABLED; 1046 // check if new lacpdu arrived 1047 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { 1048 port->sm_rx_timer_counter = 0; // zero timer 1049 port->sm_rx_state = AD_RX_CURRENT; 1050 } else { 1051 // if timer is on, and if it is expired 1052 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { 1053 switch (port->sm_rx_state) { 1054 case AD_RX_EXPIRED: 1055 port->sm_rx_state = AD_RX_DEFAULTED; // next state 1056 break; 1057 case AD_RX_CURRENT: 1058 port->sm_rx_state = AD_RX_EXPIRED; // next state 1059 break; 1060 default: //to silence the compiler 1061 break; 1062 } 1063 } else { 1064 // if no lacpdu arrived and no timer is on 1065 switch (port->sm_rx_state) { 1066 case AD_RX_PORT_DISABLED: 1067 if (port->sm_vars & AD_PORT_MOVED) 1068 port->sm_rx_state = AD_RX_INITIALIZE; // next state 1069 else if (port->is_enabled 1070 && (port->sm_vars 1071 & AD_PORT_LACP_ENABLED)) 1072 port->sm_rx_state = AD_RX_EXPIRED; // next state 1073 else if (port->is_enabled 1074 && ((port->sm_vars 1075 & AD_PORT_LACP_ENABLED) == 0)) 1076 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state 1077 break; 1078 default: //to silence the compiler 1079 break; 1080 1081 } 1082 } 1083 } 1084 1085 // check if the State machine was changed or new lacpdu arrived 1086 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1087 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", 1088 port->actor_port_number, last_state, 1089 port->sm_rx_state); 1090 switch (port->sm_rx_state) { 1091 case AD_RX_INITIALIZE: 1092 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) 1093 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1094 else 1095 port->sm_vars |= AD_PORT_LACP_ENABLED; 1096 port->sm_vars &= ~AD_PORT_SELECTED; 1097 __record_default(port); 1098 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1099 port->sm_vars &= ~AD_PORT_MOVED; 1100 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state 1101 1102 /*- Fall Through -*/ 1103 1104 case AD_RX_PORT_DISABLED: 1105 port->sm_vars &= ~AD_PORT_MATCHED; 1106 break; 1107 case AD_RX_LACP_DISABLED: 1108 port->sm_vars &= ~AD_PORT_SELECTED; 1109 __record_default(port); 1110 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1111 port->sm_vars |= AD_PORT_MATCHED; 1112 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1113 break; 1114 case AD_RX_EXPIRED: 1115 //Reset of the Synchronization flag. (Standard 43.4.12) 1116 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the 1117 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. 1118 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1119 port->sm_vars &= ~AD_PORT_MATCHED; 1120 port->partner_oper.port_state |= 1121 AD_STATE_LACP_ACTIVITY; 1122 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1123 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1124 break; 1125 case AD_RX_DEFAULTED: 1126 __update_default_selected(port); 1127 __record_default(port); 1128 port->sm_vars |= AD_PORT_MATCHED; 1129 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1130 break; 1131 case AD_RX_CURRENT: 1132 // detect loopback situation 1133 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { 1134 // INFO_RECEIVED_LOOPBACK_FRAMES 1135 pr_err("%s: An illegal loopback occurred on adapter (%s).\n" 1136 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1137 port->slave->bond->dev->name, port->slave->dev->name); 1138 return; 1139 } 1140 __update_selected(lacpdu, port); 1141 __update_ntt(lacpdu, port); 1142 __record_pdu(lacpdu, port); 1143 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1144 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1145 break; 1146 default: //to silence the compiler 1147 break; 1148 } 1149 } 1150 } 1151 1152 /** 1153 * ad_tx_machine - handle a port's tx state machine 1154 * @port: the port we're looking at 1155 * 1156 */ 1157 static void ad_tx_machine(struct port *port) 1158 { 1159 // check if tx timer expired, to verify that we do not send more than 3 packets per second 1160 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1161 // check if there is something to send 1162 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1163 __update_lacpdu_from_port(port); 1164 1165 if (ad_lacpdu_send(port) >= 0) { 1166 pr_debug("Sent LACPDU on port %d\n", 1167 port->actor_port_number); 1168 1169 /* mark ntt as false, so it will not be sent again until 1170 demanded */ 1171 port->ntt = false; 1172 } 1173 } 1174 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND 1175 port->sm_tx_timer_counter = 1176 ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1177 } 1178 } 1179 1180 /** 1181 * ad_periodic_machine - handle a port's periodic state machine 1182 * @port: the port we're looking at 1183 * 1184 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1185 */ 1186 static void ad_periodic_machine(struct port *port) 1187 { 1188 periodic_states_t last_state; 1189 1190 // keep current state machine state to compare later if it was changed 1191 last_state = port->sm_periodic_state; 1192 1193 // check if port was reinitialized 1194 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1195 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1196 ) { 1197 port->sm_periodic_state = AD_NO_PERIODIC; // next state 1198 } 1199 // check if state machine should change state 1200 else if (port->sm_periodic_timer_counter) { 1201 // check if periodic state machine expired 1202 if (!(--port->sm_periodic_timer_counter)) { 1203 // if expired then do tx 1204 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1205 } else { 1206 // If not expired, check if there is some new timeout parameter from the partner state 1207 switch (port->sm_periodic_state) { 1208 case AD_FAST_PERIODIC: 1209 if (!(port->partner_oper.port_state 1210 & AD_STATE_LACP_TIMEOUT)) 1211 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1212 break; 1213 case AD_SLOW_PERIODIC: 1214 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1215 // stop current timer 1216 port->sm_periodic_timer_counter = 0; 1217 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1218 } 1219 break; 1220 default: //to silence the compiler 1221 break; 1222 } 1223 } 1224 } else { 1225 switch (port->sm_periodic_state) { 1226 case AD_NO_PERIODIC: 1227 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1228 break; 1229 case AD_PERIODIC_TX: 1230 if (!(port->partner_oper.port_state 1231 & AD_STATE_LACP_TIMEOUT)) 1232 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1233 else 1234 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1235 break; 1236 default: //to silence the compiler 1237 break; 1238 } 1239 } 1240 1241 // check if the state machine was changed 1242 if (port->sm_periodic_state != last_state) { 1243 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1244 port->actor_port_number, last_state, 1245 port->sm_periodic_state); 1246 switch (port->sm_periodic_state) { 1247 case AD_NO_PERIODIC: 1248 port->sm_periodic_timer_counter = 0; // zero timer 1249 break; 1250 case AD_FAST_PERIODIC: 1251 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 1252 break; 1253 case AD_SLOW_PERIODIC: 1254 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 1255 break; 1256 case AD_PERIODIC_TX: 1257 port->ntt = true; 1258 break; 1259 default: //to silence the compiler 1260 break; 1261 } 1262 } 1263 } 1264 1265 /** 1266 * ad_port_selection_logic - select aggregation groups 1267 * @port: the port we're looking at 1268 * 1269 * Select aggregation groups, and assign each port for it's aggregetor. The 1270 * selection logic is called in the inititalization (after all the handshkes), 1271 * and after every lacpdu receive (if selected is off). 1272 */ 1273 static void ad_port_selection_logic(struct port *port) 1274 { 1275 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1276 struct port *last_port = NULL, *curr_port; 1277 int found = 0; 1278 1279 // if the port is already Selected, do nothing 1280 if (port->sm_vars & AD_PORT_SELECTED) 1281 return; 1282 1283 // if the port is connected to other aggregator, detach it 1284 if (port->aggregator) { 1285 // detach the port from its former aggregator 1286 temp_aggregator = port->aggregator; 1287 for (curr_port = temp_aggregator->lag_ports; curr_port; 1288 last_port = curr_port, 1289 curr_port = curr_port->next_port_in_aggregator) { 1290 if (curr_port == port) { 1291 temp_aggregator->num_of_ports--; 1292 if (!last_port) {// if it is the first port attached to the aggregator 1293 temp_aggregator->lag_ports = 1294 port->next_port_in_aggregator; 1295 } else {// not the first port attached to the aggregator 1296 last_port->next_port_in_aggregator = 1297 port->next_port_in_aggregator; 1298 } 1299 1300 // clear the port's relations to this aggregator 1301 port->aggregator = NULL; 1302 port->next_port_in_aggregator = NULL; 1303 port->actor_port_aggregator_identifier = 0; 1304 1305 pr_debug("Port %d left LAG %d\n", 1306 port->actor_port_number, 1307 temp_aggregator->aggregator_identifier); 1308 // if the aggregator is empty, clear its parameters, and set it ready to be attached 1309 if (!temp_aggregator->lag_ports) 1310 ad_clear_agg(temp_aggregator); 1311 break; 1312 } 1313 } 1314 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list 1315 pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1316 port->slave->bond->dev->name, 1317 port->actor_port_number, 1318 port->slave->dev->name, 1319 port->aggregator->aggregator_identifier); 1320 } 1321 } 1322 // search on all aggregators for a suitable aggregator for this port 1323 for (aggregator = __get_first_agg(port); aggregator; 1324 aggregator = __get_next_agg(aggregator)) { 1325 1326 // keep a free aggregator for later use(if needed) 1327 if (!aggregator->lag_ports) { 1328 if (!free_aggregator) 1329 free_aggregator = aggregator; 1330 continue; 1331 } 1332 // check if current aggregator suits us 1333 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND 1334 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) && 1335 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1336 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1337 ) && 1338 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers 1339 !aggregator->is_individual) // but is not individual OR 1340 ) 1341 ) { 1342 // attach to the founded aggregator 1343 port->aggregator = aggregator; 1344 port->actor_port_aggregator_identifier = 1345 port->aggregator->aggregator_identifier; 1346 port->next_port_in_aggregator = aggregator->lag_ports; 1347 port->aggregator->num_of_ports++; 1348 aggregator->lag_ports = port; 1349 pr_debug("Port %d joined LAG %d(existing LAG)\n", 1350 port->actor_port_number, 1351 port->aggregator->aggregator_identifier); 1352 1353 // mark this port as selected 1354 port->sm_vars |= AD_PORT_SELECTED; 1355 found = 1; 1356 break; 1357 } 1358 } 1359 1360 // the port couldn't find an aggregator - attach it to a new aggregator 1361 if (!found) { 1362 if (free_aggregator) { 1363 // assign port a new aggregator 1364 port->aggregator = free_aggregator; 1365 port->actor_port_aggregator_identifier = 1366 port->aggregator->aggregator_identifier; 1367 1368 // update the new aggregator's parameters 1369 // if port was responsed from the end-user 1370 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) 1371 /* if port is full duplex */ 1372 port->aggregator->is_individual = false; 1373 else 1374 port->aggregator->is_individual = true; 1375 1376 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; 1377 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; 1378 port->aggregator->partner_system = 1379 port->partner_oper.system; 1380 port->aggregator->partner_system_priority = 1381 port->partner_oper.system_priority; 1382 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1383 port->aggregator->receive_state = 1; 1384 port->aggregator->transmit_state = 1; 1385 port->aggregator->lag_ports = port; 1386 port->aggregator->num_of_ports++; 1387 1388 // mark this port as selected 1389 port->sm_vars |= AD_PORT_SELECTED; 1390 1391 pr_debug("Port %d joined LAG %d(new LAG)\n", 1392 port->actor_port_number, 1393 port->aggregator->aggregator_identifier); 1394 } else { 1395 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n", 1396 port->slave->bond->dev->name, 1397 port->actor_port_number, port->slave->dev->name); 1398 } 1399 } 1400 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports 1401 // else set ready=FALSE in all aggregator's ports 1402 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1403 1404 aggregator = __get_first_agg(port); 1405 ad_agg_selection_logic(aggregator); 1406 } 1407 1408 /* 1409 * Decide if "agg" is a better choice for the new active aggregator that 1410 * the current best, according to the ad_select policy. 1411 */ 1412 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1413 struct aggregator *curr) 1414 { 1415 /* 1416 * 0. If no best, select current. 1417 * 1418 * 1. If the current agg is not individual, and the best is 1419 * individual, select current. 1420 * 1421 * 2. If current agg is individual and the best is not, keep best. 1422 * 1423 * 3. Therefore, current and best are both individual or both not 1424 * individual, so: 1425 * 1426 * 3a. If current agg partner replied, and best agg partner did not, 1427 * select current. 1428 * 1429 * 3b. If current agg partner did not reply and best agg partner 1430 * did reply, keep best. 1431 * 1432 * 4. Therefore, current and best both have partner replies or 1433 * both do not, so perform selection policy: 1434 * 1435 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1436 * select by bandwidth. 1437 * 1438 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1439 */ 1440 if (!best) 1441 return curr; 1442 1443 if (!curr->is_individual && best->is_individual) 1444 return curr; 1445 1446 if (curr->is_individual && !best->is_individual) 1447 return best; 1448 1449 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1450 return curr; 1451 1452 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1453 return best; 1454 1455 switch (__get_agg_selection_mode(curr->lag_ports)) { 1456 case BOND_AD_COUNT: 1457 if (curr->num_of_ports > best->num_of_ports) 1458 return curr; 1459 1460 if (curr->num_of_ports < best->num_of_ports) 1461 return best; 1462 1463 /*FALLTHROUGH*/ 1464 case BOND_AD_STABLE: 1465 case BOND_AD_BANDWIDTH: 1466 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1467 return curr; 1468 1469 break; 1470 1471 default: 1472 pr_warning("%s: Impossible agg select mode %d\n", 1473 curr->slave->bond->dev->name, 1474 __get_agg_selection_mode(curr->lag_ports)); 1475 break; 1476 } 1477 1478 return best; 1479 } 1480 1481 static int agg_device_up(const struct aggregator *agg) 1482 { 1483 struct port *port = agg->lag_ports; 1484 if (!port) 1485 return 0; 1486 return (netif_running(port->slave->dev) && 1487 netif_carrier_ok(port->slave->dev)); 1488 } 1489 1490 /** 1491 * ad_agg_selection_logic - select an aggregation group for a team 1492 * @aggregator: the aggregator we're looking at 1493 * 1494 * It is assumed that only one aggregator may be selected for a team. 1495 * 1496 * The logic of this function is to select the aggregator according to 1497 * the ad_select policy: 1498 * 1499 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1500 * it, and to reselect the active aggregator only if the previous 1501 * aggregator has no more ports related to it. 1502 * 1503 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1504 * bandwidth, and reselect whenever a link state change takes place or the 1505 * set of slaves in the bond changes. 1506 * 1507 * BOND_AD_COUNT: select the aggregator with largest number of ports 1508 * (slaves), and reselect whenever a link state change takes place or the 1509 * set of slaves in the bond changes. 1510 * 1511 * FIXME: this function MUST be called with the first agg in the bond, or 1512 * __get_active_agg() won't work correctly. This function should be better 1513 * called with the bond itself, and retrieve the first agg from it. 1514 */ 1515 static void ad_agg_selection_logic(struct aggregator *agg) 1516 { 1517 struct aggregator *best, *active, *origin; 1518 struct port *port; 1519 1520 origin = agg; 1521 active = __get_active_agg(agg); 1522 best = (active && agg_device_up(active)) ? active : NULL; 1523 1524 do { 1525 agg->is_active = 0; 1526 1527 if (agg->num_of_ports && agg_device_up(agg)) 1528 best = ad_agg_selection_test(best, agg); 1529 1530 } while ((agg = __get_next_agg(agg))); 1531 1532 if (best && 1533 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1534 /* 1535 * For the STABLE policy, don't replace the old active 1536 * aggregator if it's still active (it has an answering 1537 * partner) or if both the best and active don't have an 1538 * answering partner. 1539 */ 1540 if (active && active->lag_ports && 1541 active->lag_ports->is_enabled && 1542 (__agg_has_partner(active) || 1543 (!__agg_has_partner(active) && !__agg_has_partner(best)))) { 1544 if (!(!active->actor_oper_aggregator_key && 1545 best->actor_oper_aggregator_key)) { 1546 best = NULL; 1547 active->is_active = 1; 1548 } 1549 } 1550 } 1551 1552 if (best && (best == active)) { 1553 best = NULL; 1554 active->is_active = 1; 1555 } 1556 1557 // if there is new best aggregator, activate it 1558 if (best) { 1559 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1560 best->aggregator_identifier, best->num_of_ports, 1561 best->actor_oper_aggregator_key, 1562 best->partner_oper_aggregator_key, 1563 best->is_individual, best->is_active); 1564 pr_debug("best ports %p slave %p %s\n", 1565 best->lag_ports, best->slave, 1566 best->slave ? best->slave->dev->name : "NULL"); 1567 1568 for (agg = __get_first_agg(best->lag_ports); agg; 1569 agg = __get_next_agg(agg)) { 1570 1571 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1572 agg->aggregator_identifier, agg->num_of_ports, 1573 agg->actor_oper_aggregator_key, 1574 agg->partner_oper_aggregator_key, 1575 agg->is_individual, agg->is_active); 1576 } 1577 1578 // check if any partner replys 1579 if (best->is_individual) { 1580 pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1581 best->slave ? best->slave->bond->dev->name : "NULL"); 1582 } 1583 1584 best->is_active = 1; 1585 pr_debug("LAG %d chosen as the active LAG\n", 1586 best->aggregator_identifier); 1587 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1588 best->aggregator_identifier, best->num_of_ports, 1589 best->actor_oper_aggregator_key, 1590 best->partner_oper_aggregator_key, 1591 best->is_individual, best->is_active); 1592 1593 // disable the ports that were related to the former active_aggregator 1594 if (active) { 1595 for (port = active->lag_ports; port; 1596 port = port->next_port_in_aggregator) { 1597 __disable_port(port); 1598 } 1599 } 1600 } 1601 1602 /* 1603 * if the selected aggregator is of join individuals 1604 * (partner_system is NULL), enable their ports 1605 */ 1606 active = __get_active_agg(origin); 1607 1608 if (active) { 1609 if (!__agg_has_partner(active)) { 1610 for (port = active->lag_ports; port; 1611 port = port->next_port_in_aggregator) { 1612 __enable_port(port); 1613 } 1614 } 1615 } 1616 1617 if (origin->slave) { 1618 struct bonding *bond; 1619 1620 bond = bond_get_bond_by_slave(origin->slave); 1621 if (bond) 1622 bond_3ad_set_carrier(bond); 1623 } 1624 } 1625 1626 /** 1627 * ad_clear_agg - clear a given aggregator's parameters 1628 * @aggregator: the aggregator we're looking at 1629 * 1630 */ 1631 static void ad_clear_agg(struct aggregator *aggregator) 1632 { 1633 if (aggregator) { 1634 aggregator->is_individual = false; 1635 aggregator->actor_admin_aggregator_key = 0; 1636 aggregator->actor_oper_aggregator_key = 0; 1637 aggregator->partner_system = null_mac_addr; 1638 aggregator->partner_system_priority = 0; 1639 aggregator->partner_oper_aggregator_key = 0; 1640 aggregator->receive_state = 0; 1641 aggregator->transmit_state = 0; 1642 aggregator->lag_ports = NULL; 1643 aggregator->is_active = 0; 1644 aggregator->num_of_ports = 0; 1645 pr_debug("LAG %d was cleared\n", 1646 aggregator->aggregator_identifier); 1647 } 1648 } 1649 1650 /** 1651 * ad_initialize_agg - initialize a given aggregator's parameters 1652 * @aggregator: the aggregator we're looking at 1653 * 1654 */ 1655 static void ad_initialize_agg(struct aggregator *aggregator) 1656 { 1657 if (aggregator) { 1658 ad_clear_agg(aggregator); 1659 1660 aggregator->aggregator_mac_address = null_mac_addr; 1661 aggregator->aggregator_identifier = 0; 1662 aggregator->slave = NULL; 1663 } 1664 } 1665 1666 /** 1667 * ad_initialize_port - initialize a given port's parameters 1668 * @aggregator: the aggregator we're looking at 1669 * @lacp_fast: boolean. whether fast periodic should be used 1670 * 1671 */ 1672 static void ad_initialize_port(struct port *port, int lacp_fast) 1673 { 1674 static const struct port_params tmpl = { 1675 .system_priority = 0xffff, 1676 .key = 1, 1677 .port_number = 1, 1678 .port_priority = 0xff, 1679 .port_state = 1, 1680 }; 1681 static const struct lacpdu lacpdu = { 1682 .subtype = 0x01, 1683 .version_number = 0x01, 1684 .tlv_type_actor_info = 0x01, 1685 .actor_information_length = 0x14, 1686 .tlv_type_partner_info = 0x02, 1687 .partner_information_length = 0x14, 1688 .tlv_type_collector_info = 0x03, 1689 .collector_information_length = 0x10, 1690 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1691 }; 1692 1693 if (port) { 1694 port->actor_port_number = 1; 1695 port->actor_port_priority = 0xff; 1696 port->actor_system = null_mac_addr; 1697 port->actor_system_priority = 0xffff; 1698 port->actor_port_aggregator_identifier = 0; 1699 port->ntt = false; 1700 port->actor_admin_port_key = 1; 1701 port->actor_oper_port_key = 1; 1702 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1703 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1704 1705 if (lacp_fast) 1706 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1707 1708 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1709 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1710 1711 port->is_enabled = true; 1712 // ****** private parameters ****** 1713 port->sm_vars = 0x3; 1714 port->sm_rx_state = 0; 1715 port->sm_rx_timer_counter = 0; 1716 port->sm_periodic_state = 0; 1717 port->sm_periodic_timer_counter = 0; 1718 port->sm_mux_state = 0; 1719 port->sm_mux_timer_counter = 0; 1720 port->sm_tx_state = 0; 1721 port->sm_tx_timer_counter = 0; 1722 port->slave = NULL; 1723 port->aggregator = NULL; 1724 port->next_port_in_aggregator = NULL; 1725 port->transaction_id = 0; 1726 1727 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1728 } 1729 } 1730 1731 /** 1732 * ad_enable_collecting_distributing - enable a port's transmit/receive 1733 * @port: the port we're looking at 1734 * 1735 * Enable @port if it's in an active aggregator 1736 */ 1737 static void ad_enable_collecting_distributing(struct port *port) 1738 { 1739 if (port->aggregator->is_active) { 1740 pr_debug("Enabling port %d(LAG %d)\n", 1741 port->actor_port_number, 1742 port->aggregator->aggregator_identifier); 1743 __enable_port(port); 1744 } 1745 } 1746 1747 /** 1748 * ad_disable_collecting_distributing - disable a port's transmit/receive 1749 * @port: the port we're looking at 1750 * 1751 */ 1752 static void ad_disable_collecting_distributing(struct port *port) 1753 { 1754 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { 1755 pr_debug("Disabling port %d(LAG %d)\n", 1756 port->actor_port_number, 1757 port->aggregator->aggregator_identifier); 1758 __disable_port(port); 1759 } 1760 } 1761 1762 #if 0 1763 /** 1764 * ad_marker_info_send - send a marker information frame 1765 * @port: the port we're looking at 1766 * 1767 * This function does nothing since we decided not to implement send and handle 1768 * response for marker PDU's, in this stage, but only to respond to marker 1769 * information. 1770 */ 1771 static void ad_marker_info_send(struct port *port) 1772 { 1773 struct bond_marker marker; 1774 u16 index; 1775 1776 // fill the marker PDU with the appropriate values 1777 marker.subtype = 0x02; 1778 marker.version_number = 0x01; 1779 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; 1780 marker.marker_length = 0x16; 1781 // convert requester_port to Big Endian 1782 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); 1783 marker.requester_system = port->actor_system; 1784 // convert requester_port(u32) to Big Endian 1785 marker.requester_transaction_id = 1786 (((++port->transaction_id & 0xFF) << 24) 1787 | ((port->transaction_id & 0xFF00) << 8) 1788 | ((port->transaction_id & 0xFF0000) >> 8) 1789 | ((port->transaction_id & 0xFF000000) >> 24)); 1790 marker.pad = 0; 1791 marker.tlv_type_terminator = 0x00; 1792 marker.terminator_length = 0x00; 1793 for (index = 0; index < 90; index++) 1794 marker.reserved_90[index] = 0; 1795 1796 // send the marker information 1797 if (ad_marker_send(port, &marker) >= 0) { 1798 pr_debug("Sent Marker Information on port %d\n", 1799 port->actor_port_number); 1800 } 1801 } 1802 #endif 1803 1804 /** 1805 * ad_marker_info_received - handle receive of a Marker information frame 1806 * @marker_info: Marker info received 1807 * @port: the port we're looking at 1808 * 1809 */ 1810 static void ad_marker_info_received(struct bond_marker *marker_info, 1811 struct port *port) 1812 { 1813 struct bond_marker marker; 1814 1815 // copy the received marker data to the response marker 1816 //marker = *marker_info; 1817 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1818 // change the marker subtype to marker response 1819 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1820 // send the marker response 1821 1822 if (ad_marker_send(port, &marker) >= 0) { 1823 pr_debug("Sent Marker Response on port %d\n", 1824 port->actor_port_number); 1825 } 1826 } 1827 1828 /** 1829 * ad_marker_response_received - handle receive of a marker response frame 1830 * @marker: marker PDU received 1831 * @port: the port we're looking at 1832 * 1833 * This function does nothing since we decided not to implement send and handle 1834 * response for marker PDU's, in this stage, but only to respond to marker 1835 * information. 1836 */ 1837 static void ad_marker_response_received(struct bond_marker *marker, 1838 struct port *port) 1839 { 1840 marker = NULL; /* just to satisfy the compiler */ 1841 port = NULL; /* just to satisfy the compiler */ 1842 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW 1843 } 1844 1845 ////////////////////////////////////////////////////////////////////////////////////// 1846 // ================= AD exported functions to the main bonding code ================== 1847 ////////////////////////////////////////////////////////////////////////////////////// 1848 1849 // Check aggregators status in team every T seconds 1850 #define AD_AGGREGATOR_SELECTION_TIMER 8 1851 1852 /* 1853 * bond_3ad_initiate_agg_selection(struct bonding *bond) 1854 * 1855 * Set the aggregation selection timer, to initiate an agg selection in 1856 * the very near future. Called during first initialization, and during 1857 * any down to up transitions of the bond. 1858 */ 1859 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1860 { 1861 BOND_AD_INFO(bond).agg_select_timer = timeout; 1862 } 1863 1864 static u16 aggregator_identifier; 1865 1866 /** 1867 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1868 * @bond: bonding struct to work on 1869 * @tick_resolution: tick duration (millisecond resolution) 1870 * 1871 * Can be called only after the mac address of the bond is set. 1872 */ 1873 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1874 { 1875 // check that the bond is not initialized yet 1876 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1877 bond->dev->dev_addr)) { 1878 1879 aggregator_identifier = 0; 1880 1881 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; 1882 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); 1883 1884 // initialize how many times this module is called in one second(should be about every 100ms) 1885 ad_ticks_per_sec = tick_resolution; 1886 1887 bond_3ad_initiate_agg_selection(bond, 1888 AD_AGGREGATOR_SELECTION_TIMER * 1889 ad_ticks_per_sec); 1890 } 1891 } 1892 1893 /** 1894 * bond_3ad_bind_slave - initialize a slave's port 1895 * @slave: slave struct to work on 1896 * 1897 * Returns: 0 on success 1898 * < 0 on error 1899 */ 1900 int bond_3ad_bind_slave(struct slave *slave) 1901 { 1902 struct bonding *bond = bond_get_bond_by_slave(slave); 1903 struct port *port; 1904 struct aggregator *aggregator; 1905 1906 if (bond == NULL) { 1907 pr_err("%s: The slave %s is not attached to its bond\n", 1908 slave->bond->dev->name, slave->dev->name); 1909 return -1; 1910 } 1911 1912 //check that the slave has not been initialized yet. 1913 if (SLAVE_AD_INFO(slave).port.slave != slave) { 1914 1915 // port initialization 1916 port = &(SLAVE_AD_INFO(slave).port); 1917 1918 ad_initialize_port(port, bond->params.lacp_fast); 1919 1920 __initialize_port_locks(slave); 1921 port->slave = slave; 1922 port->actor_port_number = SLAVE_AD_INFO(slave).id; 1923 // key is determined according to the link speed, duplex and user key(which is yet not supported) 1924 // ------------------------------------------------------------ 1925 // Port key : | User key | Speed |Duplex| 1926 // ------------------------------------------------------------ 1927 // 16 6 1 0 1928 port->actor_admin_port_key = 0; // initialize this parameter 1929 port->actor_admin_port_key |= __get_duplex(port); 1930 port->actor_admin_port_key |= (__get_link_speed(port) << 1); 1931 port->actor_oper_port_key = port->actor_admin_port_key; 1932 // if the port is not full duplex, then the port should be not lacp Enabled 1933 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) 1934 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1935 // actor system is the bond's system 1936 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 1937 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) 1938 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1939 port->aggregator = NULL; 1940 port->next_port_in_aggregator = NULL; 1941 1942 __disable_port(port); 1943 1944 // aggregator initialization 1945 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1946 1947 ad_initialize_agg(aggregator); 1948 1949 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 1950 aggregator->aggregator_identifier = (++aggregator_identifier); 1951 aggregator->slave = slave; 1952 aggregator->is_active = 0; 1953 aggregator->num_of_ports = 0; 1954 } 1955 1956 return 0; 1957 } 1958 1959 /** 1960 * bond_3ad_unbind_slave - deinitialize a slave's port 1961 * @slave: slave struct to work on 1962 * 1963 * Search for the aggregator that is related to this port, remove the 1964 * aggregator and assign another aggregator for other port related to it 1965 * (if any), and remove the port. 1966 */ 1967 void bond_3ad_unbind_slave(struct slave *slave) 1968 { 1969 struct port *port, *prev_port, *temp_port; 1970 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 1971 int select_new_active_agg = 0; 1972 1973 // find the aggregator related to this slave 1974 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1975 1976 // find the port related to this slave 1977 port = &(SLAVE_AD_INFO(slave).port); 1978 1979 // if slave is null, the whole port is not initialized 1980 if (!port->slave) { 1981 pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n", 1982 slave->bond->dev->name, slave->dev->name); 1983 return; 1984 } 1985 1986 pr_debug("Unbinding Link Aggregation Group %d\n", 1987 aggregator->aggregator_identifier); 1988 1989 /* Tell the partner that this port is not suitable for aggregation */ 1990 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 1991 __update_lacpdu_from_port(port); 1992 ad_lacpdu_send(port); 1993 1994 // check if this aggregator is occupied 1995 if (aggregator->lag_ports) { 1996 // check if there are other ports related to this aggregator except 1997 // the port related to this slave(thats ensure us that there is a 1998 // reason to search for new aggregator, and that we will find one 1999 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { 2000 // find new aggregator for the related port(s) 2001 new_aggregator = __get_first_agg(port); 2002 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) { 2003 // if the new aggregator is empty, or it is connected to our port only 2004 if (!new_aggregator->lag_ports 2005 || ((new_aggregator->lag_ports == port) 2006 && !new_aggregator->lag_ports->next_port_in_aggregator)) 2007 break; 2008 } 2009 // if new aggregator found, copy the aggregator's parameters 2010 // and connect the related lag_ports to the new aggregator 2011 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2012 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", 2013 aggregator->aggregator_identifier, 2014 new_aggregator->aggregator_identifier); 2015 2016 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { 2017 pr_info("%s: Removing an active aggregator\n", 2018 aggregator->slave->bond->dev->name); 2019 // select new active aggregator 2020 select_new_active_agg = 1; 2021 } 2022 2023 new_aggregator->is_individual = aggregator->is_individual; 2024 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2025 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2026 new_aggregator->partner_system = aggregator->partner_system; 2027 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2028 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2029 new_aggregator->receive_state = aggregator->receive_state; 2030 new_aggregator->transmit_state = aggregator->transmit_state; 2031 new_aggregator->lag_ports = aggregator->lag_ports; 2032 new_aggregator->is_active = aggregator->is_active; 2033 new_aggregator->num_of_ports = aggregator->num_of_ports; 2034 2035 // update the information that is written on the ports about the aggregator 2036 for (temp_port = aggregator->lag_ports; temp_port; 2037 temp_port = temp_port->next_port_in_aggregator) { 2038 temp_port->aggregator = new_aggregator; 2039 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2040 } 2041 2042 // clear the aggregator 2043 ad_clear_agg(aggregator); 2044 2045 if (select_new_active_agg) 2046 ad_agg_selection_logic(__get_first_agg(port)); 2047 } else { 2048 pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n", 2049 slave->bond->dev->name); 2050 } 2051 } else { // in case that the only port related to this aggregator is the one we want to remove 2052 select_new_active_agg = aggregator->is_active; 2053 // clear the aggregator 2054 ad_clear_agg(aggregator); 2055 if (select_new_active_agg) { 2056 pr_info("%s: Removing an active aggregator\n", 2057 slave->bond->dev->name); 2058 // select new active aggregator 2059 ad_agg_selection_logic(__get_first_agg(port)); 2060 } 2061 } 2062 } 2063 2064 pr_debug("Unbinding port %d\n", port->actor_port_number); 2065 // find the aggregator that this port is connected to 2066 temp_aggregator = __get_first_agg(port); 2067 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) { 2068 prev_port = NULL; 2069 // search the port in the aggregator's related ports 2070 for (temp_port = temp_aggregator->lag_ports; temp_port; 2071 prev_port = temp_port, 2072 temp_port = temp_port->next_port_in_aggregator) { 2073 if (temp_port == port) { // the aggregator found - detach the port from this aggregator 2074 if (prev_port) 2075 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2076 else 2077 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2078 temp_aggregator->num_of_ports--; 2079 if (temp_aggregator->num_of_ports == 0) { 2080 select_new_active_agg = temp_aggregator->is_active; 2081 // clear the aggregator 2082 ad_clear_agg(temp_aggregator); 2083 if (select_new_active_agg) { 2084 pr_info("%s: Removing an active aggregator\n", 2085 slave->bond->dev->name); 2086 // select new active aggregator 2087 ad_agg_selection_logic(__get_first_agg(port)); 2088 } 2089 } 2090 break; 2091 } 2092 } 2093 } 2094 port->slave = NULL; 2095 } 2096 2097 /** 2098 * bond_3ad_state_machine_handler - handle state machines timeout 2099 * @bond: bonding struct to work on 2100 * 2101 * The state machine handling concept in this module is to check every tick 2102 * which state machine should operate any function. The execution order is 2103 * round robin, so when we have an interaction between state machines, the 2104 * reply of one to each other might be delayed until next tick. 2105 * 2106 * This function also complete the initialization when the agg_select_timer 2107 * times out, and it selects an aggregator for the ports that are yet not 2108 * related to any aggregator, and selects the active aggregator for a bond. 2109 */ 2110 void bond_3ad_state_machine_handler(struct work_struct *work) 2111 { 2112 struct bonding *bond = container_of(work, struct bonding, 2113 ad_work.work); 2114 struct port *port; 2115 struct aggregator *aggregator; 2116 2117 read_lock(&bond->lock); 2118 2119 //check if there are any slaves 2120 if (list_empty(&bond->slave_list)) 2121 goto re_arm; 2122 2123 // check if agg_select_timer timer after initialize is timed out 2124 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { 2125 // select the active aggregator for the bond 2126 if ((port = __get_first_port(bond))) { 2127 if (!port->slave) { 2128 pr_warning("%s: Warning: bond's first port is uninitialized\n", 2129 bond->dev->name); 2130 goto re_arm; 2131 } 2132 2133 aggregator = __get_first_agg(port); 2134 ad_agg_selection_logic(aggregator); 2135 } 2136 bond_3ad_set_carrier(bond); 2137 } 2138 2139 // for each port run the state machines 2140 for (port = __get_first_port(bond); port; port = __get_next_port(port)) { 2141 if (!port->slave) { 2142 pr_warning("%s: Warning: Found an uninitialized port\n", 2143 bond->dev->name); 2144 goto re_arm; 2145 } 2146 2147 /* Lock around state machines to protect data accessed 2148 * by all (e.g., port->sm_vars). ad_rx_machine may run 2149 * concurrently due to incoming LACPDU. 2150 */ 2151 __get_state_machine_lock(port); 2152 2153 ad_rx_machine(NULL, port); 2154 ad_periodic_machine(port); 2155 ad_port_selection_logic(port); 2156 ad_mux_machine(port); 2157 ad_tx_machine(port); 2158 2159 // turn off the BEGIN bit, since we already handled it 2160 if (port->sm_vars & AD_PORT_BEGIN) 2161 port->sm_vars &= ~AD_PORT_BEGIN; 2162 2163 __release_state_machine_lock(port); 2164 } 2165 2166 re_arm: 2167 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2168 2169 read_unlock(&bond->lock); 2170 } 2171 2172 /** 2173 * bond_3ad_rx_indication - handle a received frame 2174 * @lacpdu: received lacpdu 2175 * @slave: slave struct to work on 2176 * @length: length of the data received 2177 * 2178 * It is assumed that frames that were sent on this NIC don't returned as new 2179 * received frames (loopback). Since only the payload is given to this 2180 * function, it check for loopback. 2181 */ 2182 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) 2183 { 2184 struct port *port; 2185 int ret = RX_HANDLER_ANOTHER; 2186 2187 if (length >= sizeof(struct lacpdu)) { 2188 2189 port = &(SLAVE_AD_INFO(slave).port); 2190 2191 if (!port->slave) { 2192 pr_warning("%s: Warning: port of slave %s is uninitialized\n", 2193 slave->dev->name, slave->bond->dev->name); 2194 return ret; 2195 } 2196 2197 switch (lacpdu->subtype) { 2198 case AD_TYPE_LACPDU: 2199 ret = RX_HANDLER_CONSUMED; 2200 pr_debug("Received LACPDU on port %d\n", 2201 port->actor_port_number); 2202 /* Protect against concurrent state machines */ 2203 __get_state_machine_lock(port); 2204 ad_rx_machine(lacpdu, port); 2205 __release_state_machine_lock(port); 2206 break; 2207 2208 case AD_TYPE_MARKER: 2209 ret = RX_HANDLER_CONSUMED; 2210 // No need to convert fields to Little Endian since we don't use the marker's fields. 2211 2212 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2213 case AD_MARKER_INFORMATION_SUBTYPE: 2214 pr_debug("Received Marker Information on port %d\n", 2215 port->actor_port_number); 2216 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2217 break; 2218 2219 case AD_MARKER_RESPONSE_SUBTYPE: 2220 pr_debug("Received Marker Response on port %d\n", 2221 port->actor_port_number); 2222 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2223 break; 2224 2225 default: 2226 pr_debug("Received an unknown Marker subtype on slot %d\n", 2227 port->actor_port_number); 2228 } 2229 } 2230 } 2231 return ret; 2232 } 2233 2234 /** 2235 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication 2236 * @slave: slave struct to work on 2237 * 2238 * Handle reselection of aggregator (if needed) for this port. 2239 */ 2240 void bond_3ad_adapter_speed_changed(struct slave *slave) 2241 { 2242 struct port *port; 2243 2244 port = &(SLAVE_AD_INFO(slave).port); 2245 2246 // if slave is null, the whole port is not initialized 2247 if (!port->slave) { 2248 pr_warning("Warning: %s: speed changed for uninitialized port on %s\n", 2249 slave->bond->dev->name, slave->dev->name); 2250 return; 2251 } 2252 2253 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2254 port->actor_oper_port_key = port->actor_admin_port_key |= 2255 (__get_link_speed(port) << 1); 2256 pr_debug("Port %d changed speed\n", port->actor_port_number); 2257 // there is no need to reselect a new aggregator, just signal the 2258 // state machines to reinitialize 2259 port->sm_vars |= AD_PORT_BEGIN; 2260 } 2261 2262 /** 2263 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication 2264 * @slave: slave struct to work on 2265 * 2266 * Handle reselection of aggregator (if needed) for this port. 2267 */ 2268 void bond_3ad_adapter_duplex_changed(struct slave *slave) 2269 { 2270 struct port *port; 2271 2272 port = &(SLAVE_AD_INFO(slave).port); 2273 2274 // if slave is null, the whole port is not initialized 2275 if (!port->slave) { 2276 pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n", 2277 slave->bond->dev->name, slave->dev->name); 2278 return; 2279 } 2280 2281 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2282 port->actor_oper_port_key = port->actor_admin_port_key |= 2283 __get_duplex(port); 2284 pr_debug("Port %d changed duplex\n", port->actor_port_number); 2285 // there is no need to reselect a new aggregator, just signal the 2286 // state machines to reinitialize 2287 port->sm_vars |= AD_PORT_BEGIN; 2288 } 2289 2290 /** 2291 * bond_3ad_handle_link_change - handle a slave's link status change indication 2292 * @slave: slave struct to work on 2293 * @status: whether the link is now up or down 2294 * 2295 * Handle reselection of aggregator (if needed) for this port. 2296 */ 2297 void bond_3ad_handle_link_change(struct slave *slave, char link) 2298 { 2299 struct port *port; 2300 2301 port = &(SLAVE_AD_INFO(slave).port); 2302 2303 // if slave is null, the whole port is not initialized 2304 if (!port->slave) { 2305 pr_warning("Warning: %s: link status changed for uninitialized port on %s\n", 2306 slave->bond->dev->name, slave->dev->name); 2307 return; 2308 } 2309 2310 // 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) 2311 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report 2312 if (link == BOND_LINK_UP) { 2313 port->is_enabled = true; 2314 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2315 port->actor_oper_port_key = port->actor_admin_port_key |= 2316 __get_duplex(port); 2317 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2318 port->actor_oper_port_key = port->actor_admin_port_key |= 2319 (__get_link_speed(port) << 1); 2320 } else { 2321 /* link has failed */ 2322 port->is_enabled = false; 2323 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2324 port->actor_oper_port_key = (port->actor_admin_port_key &= 2325 ~AD_SPEED_KEY_BITS); 2326 } 2327 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); 2328 // there is no need to reselect a new aggregator, just signal the 2329 // state machines to reinitialize 2330 port->sm_vars |= AD_PORT_BEGIN; 2331 } 2332 2333 /* 2334 * set link state for bonding master: if we have an active 2335 * aggregator, we're up, if not, we're down. Presumes that we cannot 2336 * have an active aggregator if there are no slaves with link up. 2337 * 2338 * This behavior complies with IEEE 802.3 section 43.3.9. 2339 * 2340 * Called by bond_set_carrier(). Return zero if carrier state does not 2341 * change, nonzero if it does. 2342 */ 2343 int bond_3ad_set_carrier(struct bonding *bond) 2344 { 2345 struct aggregator *active; 2346 struct slave *first_slave; 2347 2348 first_slave = bond_first_slave(bond); 2349 if (!first_slave) 2350 return 0; 2351 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator)); 2352 if (active) { 2353 /* are enough slaves available to consider link up? */ 2354 if (active->num_of_ports < bond->params.min_links) { 2355 if (netif_carrier_ok(bond->dev)) { 2356 netif_carrier_off(bond->dev); 2357 return 1; 2358 } 2359 } else if (!netif_carrier_ok(bond->dev)) { 2360 netif_carrier_on(bond->dev); 2361 return 1; 2362 } 2363 return 0; 2364 } 2365 2366 if (netif_carrier_ok(bond->dev)) { 2367 netif_carrier_off(bond->dev); 2368 return 1; 2369 } 2370 return 0; 2371 } 2372 2373 /** 2374 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2375 * @bond: bonding struct to work on 2376 * @ad_info: ad_info struct to fill with the bond's info 2377 * 2378 * Returns: 0 on success 2379 * < 0 on error 2380 */ 2381 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2382 struct ad_info *ad_info) 2383 { 2384 struct aggregator *aggregator = NULL; 2385 struct port *port; 2386 2387 for (port = __get_first_port(bond); port; port = __get_next_port(port)) { 2388 if (port->aggregator && port->aggregator->is_active) { 2389 aggregator = port->aggregator; 2390 break; 2391 } 2392 } 2393 2394 if (aggregator) { 2395 ad_info->aggregator_id = aggregator->aggregator_identifier; 2396 ad_info->ports = aggregator->num_of_ports; 2397 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2398 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2399 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); 2400 return 0; 2401 } 2402 2403 return -1; 2404 } 2405 2406 /* Wrapper used to hold bond->lock so no slave manipulation can occur */ 2407 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2408 { 2409 int ret; 2410 2411 read_lock(&bond->lock); 2412 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2413 read_unlock(&bond->lock); 2414 2415 return ret; 2416 } 2417 2418 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) 2419 { 2420 struct slave *slave, *start_at; 2421 struct bonding *bond = netdev_priv(dev); 2422 int slave_agg_no; 2423 int slaves_in_agg; 2424 int agg_id; 2425 int i; 2426 struct ad_info ad_info; 2427 int res = 1; 2428 2429 read_lock(&bond->lock); 2430 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { 2431 pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n", 2432 dev->name); 2433 goto out; 2434 } 2435 2436 slaves_in_agg = ad_info.ports; 2437 agg_id = ad_info.aggregator_id; 2438 2439 if (slaves_in_agg == 0) { 2440 /*the aggregator is empty*/ 2441 pr_debug("%s: Error: active aggregator is empty\n", dev->name); 2442 goto out; 2443 } 2444 2445 slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg); 2446 2447 bond_for_each_slave(bond, slave) { 2448 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; 2449 2450 if (agg && (agg->aggregator_identifier == agg_id)) { 2451 slave_agg_no--; 2452 if (slave_agg_no < 0) 2453 break; 2454 } 2455 } 2456 2457 if (slave_agg_no >= 0) { 2458 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n", 2459 dev->name, agg_id); 2460 goto out; 2461 } 2462 2463 start_at = slave; 2464 2465 bond_for_each_slave_from(bond, slave, i, start_at) { 2466 int slave_agg_id = 0; 2467 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; 2468 2469 if (agg) 2470 slave_agg_id = agg->aggregator_identifier; 2471 2472 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) { 2473 res = bond_dev_queue_xmit(bond, skb, slave->dev); 2474 break; 2475 } 2476 } 2477 2478 out: 2479 read_unlock(&bond->lock); 2480 if (res) { 2481 /* no suitable interface, frame not sent */ 2482 kfree_skb(skb); 2483 } 2484 2485 return NETDEV_TX_OK; 2486 } 2487 2488 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2489 struct slave *slave) 2490 { 2491 int ret = RX_HANDLER_ANOTHER; 2492 struct lacpdu *lacpdu, _lacpdu; 2493 2494 if (skb->protocol != PKT_TYPE_LACPDU) 2495 return ret; 2496 2497 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2498 if (!lacpdu) 2499 return ret; 2500 2501 read_lock(&bond->lock); 2502 ret = bond_3ad_rx_indication(lacpdu, slave, skb->len); 2503 read_unlock(&bond->lock); 2504 return ret; 2505 } 2506 2507 /* 2508 * When modify lacp_rate parameter via sysfs, 2509 * update actor_oper_port_state of each port. 2510 * 2511 * Hold slave->state_machine_lock, 2512 * so we can modify port->actor_oper_port_state, 2513 * no matter bond is up or down. 2514 */ 2515 void bond_3ad_update_lacp_rate(struct bonding *bond) 2516 { 2517 struct port *port = NULL; 2518 struct slave *slave; 2519 int lacp_fast; 2520 2521 lacp_fast = bond->params.lacp_fast; 2522 bond_for_each_slave(bond, slave) { 2523 port = &(SLAVE_AD_INFO(slave).port); 2524 __get_state_machine_lock(port); 2525 if (lacp_fast) 2526 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2527 else 2528 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2529 __release_state_machine_lock(port); 2530 } 2531 } 2532