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 * Changes: 23 * 24 * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and 25 * Amir Noam <amir.noam at intel dot com> 26 * - Added support for lacp_rate module param. 27 * 28 * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> 29 * - Based on discussion on mailing list, changed locking scheme 30 * to use lock/unlock or lock_bh/unlock_bh appropriately instead 31 * of lock_irqsave/unlock_irqrestore. The new scheme helps exposing 32 * hidden bugs and solves system hangs that occurred due to the fact 33 * that holding lock_irqsave doesn't prevent softirqs from running. 34 * This also increases total throughput since interrupts are not 35 * blocked on each transmitted packets or monitor timeout. 36 * 37 * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> 38 * - Renamed bond_3ad_link_status_changed() to 39 * bond_3ad_handle_link_change() for compatibility with TLB. 40 * 41 * 2003/05/20 - Amir Noam <amir.noam at intel dot com> 42 * - Fix long fail over time when releasing last slave of an active 43 * aggregator - send LACPDU on unbind of slave to tell partner this 44 * port is no longer aggregatable. 45 * 46 * 2003/06/25 - Tsippy Mendelson <tsippy.mendelson at intel dot com> 47 * - Send LACPDU as highest priority packet to further fix the above 48 * problem on very high Tx traffic load where packets may get dropped 49 * by the slave. 50 * 51 * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com> 52 * - Code cleanup and style changes 53 */ 54 55 //#define BONDING_DEBUG 1 56 57 #include <linux/skbuff.h> 58 #include <linux/if_ether.h> 59 #include <linux/netdevice.h> 60 #include <linux/spinlock.h> 61 #include <linux/ethtool.h> 62 #include <linux/if_bonding.h> 63 #include <linux/pkt_sched.h> 64 #include "bonding.h" 65 #include "bond_3ad.h" 66 67 // General definitions 68 #define AD_SHORT_TIMEOUT 1 69 #define AD_LONG_TIMEOUT 0 70 #define AD_STANDBY 0x2 71 #define AD_MAX_TX_IN_SECOND 3 72 #define AD_COLLECTOR_MAX_DELAY 0 73 74 // Timer definitions(43.4.4 in the 802.3ad standard) 75 #define AD_FAST_PERIODIC_TIME 1 76 #define AD_SLOW_PERIODIC_TIME 30 77 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) 78 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) 79 #define AD_CHURN_DETECTION_TIME 60 80 #define AD_AGGREGATE_WAIT_TIME 2 81 82 // Port state definitions(43.4.2.2 in the 802.3ad standard) 83 #define AD_STATE_LACP_ACTIVITY 0x1 84 #define AD_STATE_LACP_TIMEOUT 0x2 85 #define AD_STATE_AGGREGATION 0x4 86 #define AD_STATE_SYNCHRONIZATION 0x8 87 #define AD_STATE_COLLECTING 0x10 88 #define AD_STATE_DISTRIBUTING 0x20 89 #define AD_STATE_DEFAULTED 0x40 90 #define AD_STATE_EXPIRED 0x80 91 92 // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard) 93 #define AD_PORT_BEGIN 0x1 94 #define AD_PORT_LACP_ENABLED 0x2 95 #define AD_PORT_ACTOR_CHURN 0x4 96 #define AD_PORT_PARTNER_CHURN 0x8 97 #define AD_PORT_READY 0x10 98 #define AD_PORT_READY_N 0x20 99 #define AD_PORT_MATCHED 0x40 100 #define AD_PORT_STANDBY 0x80 101 #define AD_PORT_SELECTED 0x100 102 #define AD_PORT_MOVED 0x200 103 104 // Port Key definitions 105 // key is determined according to the link speed, duplex and 106 // user key(which is yet not supported) 107 // ------------------------------------------------------------ 108 // Port key : | User key | Speed |Duplex| 109 // ------------------------------------------------------------ 110 // 16 6 1 0 111 #define AD_DUPLEX_KEY_BITS 0x1 112 #define AD_SPEED_KEY_BITS 0x3E 113 #define AD_USER_KEY_BITS 0xFFC0 114 115 //dalloun 116 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 117 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 118 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 119 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 120 //endalloun 121 122 // compare MAC addresses 123 #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN) 124 125 static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}}; 126 static u16 ad_ticks_per_sec; 127 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 128 129 // ================= 3AD api to bonding and kernel code ================== 130 static u16 __get_link_speed(struct port *port); 131 static u8 __get_duplex(struct port *port); 132 static inline void __initialize_port_locks(struct port *port); 133 //conversions 134 static void __ntohs_lacpdu(struct lacpdu *lacpdu); 135 static u16 __ad_timer_to_ticks(u16 timer_type, u16 Par); 136 137 138 // ================= ad code helper functions ================== 139 //needed by ad_rx_machine(...) 140 static void __record_pdu(struct lacpdu *lacpdu, struct port *port); 141 static void __record_default(struct port *port); 142 static void __update_selected(struct lacpdu *lacpdu, struct port *port); 143 static void __update_default_selected(struct port *port); 144 static void __choose_matched(struct lacpdu *lacpdu, struct port *port); 145 static void __update_ntt(struct lacpdu *lacpdu, struct port *port); 146 147 //needed for ad_mux_machine(..) 148 static void __attach_bond_to_agg(struct port *port); 149 static void __detach_bond_from_agg(struct port *port); 150 static int __agg_ports_are_ready(struct aggregator *aggregator); 151 static void __set_agg_ports_ready(struct aggregator *aggregator, int val); 152 153 //needed for ad_agg_selection_logic(...) 154 static u32 __get_agg_bandwidth(struct aggregator *aggregator); 155 static struct aggregator *__get_active_agg(struct aggregator *aggregator); 156 157 158 // ================= main 802.3ad protocol functions ================== 159 static int ad_lacpdu_send(struct port *port); 160 static int ad_marker_send(struct port *port, struct marker *marker); 161 static void ad_mux_machine(struct port *port); 162 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 163 static void ad_tx_machine(struct port *port); 164 static void ad_periodic_machine(struct port *port); 165 static void ad_port_selection_logic(struct port *port); 166 static void ad_agg_selection_logic(struct aggregator *aggregator); 167 static void ad_clear_agg(struct aggregator *aggregator); 168 static void ad_initialize_agg(struct aggregator *aggregator); 169 static void ad_initialize_port(struct port *port, int lacp_fast); 170 static void ad_initialize_lacpdu(struct lacpdu *Lacpdu); 171 static void ad_enable_collecting_distributing(struct port *port); 172 static void ad_disable_collecting_distributing(struct port *port); 173 static void ad_marker_info_received(struct marker *marker_info, struct port *port); 174 static void ad_marker_response_received(struct marker *marker, struct port *port); 175 176 177 ///////////////////////////////////////////////////////////////////////////////// 178 // ================= api to bonding and kernel code ================== 179 ///////////////////////////////////////////////////////////////////////////////// 180 181 /** 182 * __get_bond_by_port - get the port's bonding struct 183 * @port: the port we're looking at 184 * 185 * Return @port's bonding struct, or %NULL if it can't be found. 186 */ 187 static inline struct bonding *__get_bond_by_port(struct port *port) 188 { 189 if (port->slave == NULL) { 190 return NULL; 191 } 192 193 return bond_get_bond_by_slave(port->slave); 194 } 195 196 /** 197 * __get_first_port - get the first port in the bond 198 * @bond: the bond we're looking at 199 * 200 * Return the port of the first slave in @bond, or %NULL if it can't be found. 201 */ 202 static inline struct port *__get_first_port(struct bonding *bond) 203 { 204 if (bond->slave_cnt == 0) { 205 return NULL; 206 } 207 208 return &(SLAVE_AD_INFO(bond->first_slave).port); 209 } 210 211 /** 212 * __get_next_port - get the next port in the bond 213 * @port: the port we're looking at 214 * 215 * Return the port of the slave that is next in line of @port's slave in the 216 * bond, or %NULL if it can't be found. 217 */ 218 static inline struct port *__get_next_port(struct port *port) 219 { 220 struct bonding *bond = __get_bond_by_port(port); 221 struct slave *slave = port->slave; 222 223 // If there's no bond for this port, or this is the last slave 224 if ((bond == NULL) || (slave->next == bond->first_slave)) { 225 return NULL; 226 } 227 228 return &(SLAVE_AD_INFO(slave->next).port); 229 } 230 231 /** 232 * __get_first_agg - get the first aggregator in the bond 233 * @bond: the bond we're looking at 234 * 235 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 236 * found. 237 */ 238 static inline struct aggregator *__get_first_agg(struct port *port) 239 { 240 struct bonding *bond = __get_bond_by_port(port); 241 242 // If there's no bond for this port, or bond has no slaves 243 if ((bond == NULL) || (bond->slave_cnt == 0)) { 244 return NULL; 245 } 246 247 return &(SLAVE_AD_INFO(bond->first_slave).aggregator); 248 } 249 250 /** 251 * __get_next_agg - get the next aggregator in the bond 252 * @aggregator: the aggregator we're looking at 253 * 254 * Return the aggregator of the slave that is next in line of @aggregator's 255 * slave in the bond, or %NULL if it can't be found. 256 */ 257 static inline struct aggregator *__get_next_agg(struct aggregator *aggregator) 258 { 259 struct slave *slave = aggregator->slave; 260 struct bonding *bond = bond_get_bond_by_slave(slave); 261 262 // If there's no bond for this aggregator, or this is the last slave 263 if ((bond == NULL) || (slave->next == bond->first_slave)) { 264 return NULL; 265 } 266 267 return &(SLAVE_AD_INFO(slave->next).aggregator); 268 } 269 270 /** 271 * __disable_port - disable the port's slave 272 * @port: the port we're looking at 273 * 274 */ 275 static inline void __disable_port(struct port *port) 276 { 277 bond_set_slave_inactive_flags(port->slave); 278 } 279 280 /** 281 * __enable_port - enable the port's slave, if it's up 282 * @port: the port we're looking at 283 * 284 */ 285 static inline void __enable_port(struct port *port) 286 { 287 struct slave *slave = port->slave; 288 289 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) { 290 bond_set_slave_active_flags(slave); 291 } 292 } 293 294 /** 295 * __port_is_enabled - check if the port's slave is in active state 296 * @port: the port we're looking at 297 * 298 */ 299 static inline int __port_is_enabled(struct port *port) 300 { 301 return(port->slave->state == BOND_STATE_ACTIVE); 302 } 303 304 /** 305 * __get_agg_selection_mode - get the aggregator selection mode 306 * @port: the port we're looking at 307 * 308 * Get the aggregator selection mode. Can be %BANDWIDTH or %COUNT. 309 */ 310 static inline u32 __get_agg_selection_mode(struct port *port) 311 { 312 struct bonding *bond = __get_bond_by_port(port); 313 314 if (bond == NULL) { 315 return AD_BANDWIDTH; 316 } 317 318 return BOND_AD_INFO(bond).agg_select_mode; 319 } 320 321 /** 322 * __check_agg_selection_timer - check if the selection timer has expired 323 * @port: the port we're looking at 324 * 325 */ 326 static inline int __check_agg_selection_timer(struct port *port) 327 { 328 struct bonding *bond = __get_bond_by_port(port); 329 330 if (bond == NULL) { 331 return 0; 332 } 333 334 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 335 } 336 337 /** 338 * __get_rx_machine_lock - lock the port's RX machine 339 * @port: the port we're looking at 340 * 341 */ 342 static inline void __get_rx_machine_lock(struct port *port) 343 { 344 spin_lock(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 345 } 346 347 /** 348 * __release_rx_machine_lock - unlock the port's RX machine 349 * @port: the port we're looking at 350 * 351 */ 352 static inline void __release_rx_machine_lock(struct port *port) 353 { 354 spin_unlock(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 355 } 356 357 /** 358 * __get_link_speed - get a port's speed 359 * @port: the port we're looking at 360 * 361 * Return @port's speed in 802.3ad bitmask format. i.e. one of: 362 * 0, 363 * %AD_LINK_SPEED_BITMASK_10MBPS, 364 * %AD_LINK_SPEED_BITMASK_100MBPS, 365 * %AD_LINK_SPEED_BITMASK_1000MBPS 366 */ 367 static u16 __get_link_speed(struct port *port) 368 { 369 struct slave *slave = port->slave; 370 u16 speed; 371 372 /* this if covers only a special case: when the configuration starts with 373 * link down, it sets the speed to 0. 374 * This is done in spite of the fact that the e100 driver reports 0 to be 375 * compatible with MVT in the future.*/ 376 if (slave->link != BOND_LINK_UP) { 377 speed=0; 378 } else { 379 switch (slave->speed) { 380 case SPEED_10: 381 speed = AD_LINK_SPEED_BITMASK_10MBPS; 382 break; 383 384 case SPEED_100: 385 speed = AD_LINK_SPEED_BITMASK_100MBPS; 386 break; 387 388 case SPEED_1000: 389 speed = AD_LINK_SPEED_BITMASK_1000MBPS; 390 break; 391 392 default: 393 speed = 0; // unknown speed value from ethtool. shouldn't happen 394 break; 395 } 396 } 397 398 dprintk("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed); 399 return speed; 400 } 401 402 /** 403 * __get_duplex - get a port's duplex 404 * @port: the port we're looking at 405 * 406 * Return @port's duplex in 802.3ad bitmask format. i.e.: 407 * 0x01 if in full duplex 408 * 0x00 otherwise 409 */ 410 static u8 __get_duplex(struct port *port) 411 { 412 struct slave *slave = port->slave; 413 414 u8 retval; 415 416 // handling a special case: when the configuration starts with 417 // link down, it sets the duplex to 0. 418 if (slave->link != BOND_LINK_UP) { 419 retval=0x0; 420 } else { 421 switch (slave->duplex) { 422 case DUPLEX_FULL: 423 retval=0x1; 424 dprintk("Port %d Received status full duplex update from adapter\n", port->actor_port_number); 425 break; 426 case DUPLEX_HALF: 427 default: 428 retval=0x0; 429 dprintk("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number); 430 break; 431 } 432 } 433 return retval; 434 } 435 436 /** 437 * __initialize_port_locks - initialize a port's RX machine spinlock 438 * @port: the port we're looking at 439 * 440 */ 441 static inline void __initialize_port_locks(struct port *port) 442 { 443 // make sure it isn't called twice 444 spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 445 } 446 447 //conversions 448 /** 449 * __ntohs_lacpdu - convert the contents of a LACPDU to host byte order 450 * @lacpdu: the speicifed lacpdu 451 * 452 * For each multi-byte field in the lacpdu, convert its content 453 */ 454 static void __ntohs_lacpdu(struct lacpdu *lacpdu) 455 { 456 if (lacpdu) { 457 lacpdu->actor_system_priority = ntohs(lacpdu->actor_system_priority); 458 lacpdu->actor_key = ntohs(lacpdu->actor_key); 459 lacpdu->actor_port_priority = ntohs(lacpdu->actor_port_priority); 460 lacpdu->actor_port = ntohs(lacpdu->actor_port); 461 lacpdu->partner_system_priority = ntohs(lacpdu->partner_system_priority); 462 lacpdu->partner_key = ntohs(lacpdu->partner_key); 463 lacpdu->partner_port_priority = ntohs(lacpdu->partner_port_priority); 464 lacpdu->partner_port = ntohs(lacpdu->partner_port); 465 lacpdu->collector_max_delay = ntohs(lacpdu->collector_max_delay); 466 } 467 } 468 469 /** 470 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 471 * @timer_type: which timer to operate 472 * @par: timer parameter. see below 473 * 474 * If @timer_type is %current_while_timer, @par indicates long/short timer. 475 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 476 * %SLOW_PERIODIC_TIME. 477 */ 478 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 479 { 480 u16 retval=0; //to silence the compiler 481 482 switch (timer_type) { 483 case AD_CURRENT_WHILE_TIMER: // for rx machine usage 484 if (par) { // for short or long timeout 485 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout 486 } else { 487 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout 488 } 489 break; 490 case AD_ACTOR_CHURN_TIMER: // for local churn machine 491 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 492 break; 493 case AD_PERIODIC_TIMER: // for periodic machine 494 retval = (par*ad_ticks_per_sec); // long timeout 495 break; 496 case AD_PARTNER_CHURN_TIMER: // for remote churn machine 497 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 498 break; 499 case AD_WAIT_WHILE_TIMER: // for selection machine 500 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 501 break; 502 } 503 return retval; 504 } 505 506 507 ///////////////////////////////////////////////////////////////////////////////// 508 // ================= ad_rx_machine helper functions ================== 509 ///////////////////////////////////////////////////////////////////////////////// 510 511 /** 512 * __record_pdu - record parameters from a received lacpdu 513 * @lacpdu: the lacpdu we've received 514 * @port: the port we're looking at 515 * 516 * Record the parameter values for the Actor carried in a received lacpdu as 517 * the current partner operational parameter values and sets 518 * actor_oper_port_state.defaulted to FALSE. 519 */ 520 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 521 { 522 // validate lacpdu and port 523 if (lacpdu && port) { 524 // record the new parameter values for the partner operational 525 port->partner_oper_port_number = lacpdu->actor_port; 526 port->partner_oper_port_priority = lacpdu->actor_port_priority; 527 port->partner_oper_system = lacpdu->actor_system; 528 port->partner_oper_system_priority = lacpdu->actor_system_priority; 529 port->partner_oper_key = lacpdu->actor_key; 530 // zero partener's lase states 531 port->partner_oper_port_state = 0; 532 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_ACTIVITY); 533 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_TIMEOUT); 534 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_AGGREGATION); 535 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION); 536 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_COLLECTING); 537 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DISTRIBUTING); 538 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DEFAULTED); 539 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_EXPIRED); 540 541 // set actor_oper_port_state.defaulted to FALSE 542 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 543 544 // set the partner sync. to on if the partner is sync. and the port is matched 545 if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 546 port->partner_oper_port_state |= AD_STATE_SYNCHRONIZATION; 547 } else { 548 port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 549 } 550 } 551 } 552 553 /** 554 * __record_default - record default parameters 555 * @port: the port we're looking at 556 * 557 * This function records the default parameter values for the partner carried 558 * in the Partner Admin parameters as the current partner operational parameter 559 * values and sets actor_oper_port_state.defaulted to TRUE. 560 */ 561 static void __record_default(struct port *port) 562 { 563 // validate the port 564 if (port) { 565 // record the partner admin parameters 566 port->partner_oper_port_number = port->partner_admin_port_number; 567 port->partner_oper_port_priority = port->partner_admin_port_priority; 568 port->partner_oper_system = port->partner_admin_system; 569 port->partner_oper_system_priority = port->partner_admin_system_priority; 570 port->partner_oper_key = port->partner_admin_key; 571 port->partner_oper_port_state = port->partner_admin_port_state; 572 573 // set actor_oper_port_state.defaulted to true 574 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 575 } 576 } 577 578 /** 579 * __update_selected - update a port's Selected variable from a received lacpdu 580 * @lacpdu: the lacpdu we've received 581 * @port: the port we're looking at 582 * 583 * Update the value of the selected variable, using parameter values from a 584 * newly received lacpdu. The parameter values for the Actor carried in the 585 * received PDU are compared with the corresponding operational parameter 586 * values for the ports partner. If one or more of the comparisons shows that 587 * the value(s) received in the PDU differ from the current operational values, 588 * then selected is set to FALSE and actor_oper_port_state.synchronization is 589 * set to out_of_sync. Otherwise, selected remains unchanged. 590 */ 591 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 592 { 593 // validate lacpdu and port 594 if (lacpdu && port) { 595 // check if any parameter is different 596 if ((lacpdu->actor_port != port->partner_oper_port_number) || 597 (lacpdu->actor_port_priority != port->partner_oper_port_priority) || 598 MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->partner_oper_system)) || 599 (lacpdu->actor_system_priority != port->partner_oper_system_priority) || 600 (lacpdu->actor_key != port->partner_oper_key) || 601 ((lacpdu->actor_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION)) 602 ) { 603 // update the state machine Selected variable 604 port->sm_vars &= ~AD_PORT_SELECTED; 605 } 606 } 607 } 608 609 /** 610 * __update_default_selected - update a port's Selected variable from Partner 611 * @port: the port we're looking at 612 * 613 * This function updates the value of the selected variable, using the partner 614 * administrative parameter values. The administrative values are compared with 615 * the corresponding operational parameter values for the partner. If one or 616 * more of the comparisons shows that the administrative value(s) differ from 617 * the current operational values, then Selected is set to FALSE and 618 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 619 * Selected remains unchanged. 620 */ 621 static void __update_default_selected(struct port *port) 622 { 623 // validate the port 624 if (port) { 625 // check if any parameter is different 626 if ((port->partner_admin_port_number != port->partner_oper_port_number) || 627 (port->partner_admin_port_priority != port->partner_oper_port_priority) || 628 MAC_ADDRESS_COMPARE(&(port->partner_admin_system), &(port->partner_oper_system)) || 629 (port->partner_admin_system_priority != port->partner_oper_system_priority) || 630 (port->partner_admin_key != port->partner_oper_key) || 631 ((port->partner_admin_port_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION)) 632 ) { 633 // update the state machine Selected variable 634 port->sm_vars &= ~AD_PORT_SELECTED; 635 } 636 } 637 } 638 639 /** 640 * __choose_matched - update a port's matched variable from a received lacpdu 641 * @lacpdu: the lacpdu we've received 642 * @port: the port we're looking at 643 * 644 * Update the value of the matched variable, using parameter values from a 645 * newly received lacpdu. Parameter values for the partner carried in the 646 * received PDU are compared with the corresponding operational parameter 647 * values for the actor. Matched is set to TRUE if all of these parameters 648 * match and the PDU parameter partner_state.aggregation has the same value as 649 * actor_oper_port_state.aggregation and lacp will actively maintain the link 650 * in the aggregation. Matched is also set to TRUE if the value of 651 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 652 * an individual link and lacp will actively maintain the link. Otherwise, 653 * matched is set to FALSE. LACP is considered to be actively maintaining the 654 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 655 * the actor's actor_oper_port_state.lacp_activity and the PDU's 656 * partner_state.lacp_activity variables are TRUE. 657 */ 658 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 659 { 660 // validate lacpdu and port 661 if (lacpdu && port) { 662 // check if all parameters are alike 663 if (((lacpdu->partner_port == port->actor_port_number) && 664 (lacpdu->partner_port_priority == port->actor_port_priority) && 665 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && 666 (lacpdu->partner_system_priority == port->actor_system_priority) && 667 (lacpdu->partner_key == port->actor_oper_port_key) && 668 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 669 // or this is individual link(aggregation == FALSE) 670 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 671 ) { 672 // update the state machine Matched variable 673 port->sm_vars |= AD_PORT_MATCHED; 674 } else { 675 port->sm_vars &= ~AD_PORT_MATCHED; 676 } 677 } 678 } 679 680 /** 681 * __update_ntt - update a port's ntt variable from a received lacpdu 682 * @lacpdu: the lacpdu we've received 683 * @port: the port we're looking at 684 * 685 * Updates the value of the ntt variable, using parameter values from a newly 686 * received lacpdu. The parameter values for the partner carried in the 687 * received PDU are compared with the corresponding operational parameter 688 * values for the Actor. If one or more of the comparisons shows that the 689 * value(s) received in the PDU differ from the current operational values, 690 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 691 */ 692 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 693 { 694 // validate lacpdu and port 695 if (lacpdu && port) { 696 // check if any parameter is different 697 if ((lacpdu->partner_port != port->actor_port_number) || 698 (lacpdu->partner_port_priority != port->actor_port_priority) || 699 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || 700 (lacpdu->partner_system_priority != port->actor_system_priority) || 701 (lacpdu->partner_key != port->actor_oper_port_key) || 702 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 703 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 704 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 705 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 706 ) { 707 // set ntt to be TRUE 708 port->ntt = 1; 709 } 710 } 711 } 712 713 /** 714 * __attach_bond_to_agg 715 * @port: the port we're looking at 716 * 717 * Handle the attaching of the port's control parser/multiplexer and the 718 * aggregator. This function does nothing since the parser/multiplexer of the 719 * receive and the parser/multiplexer of the aggregator are already combined. 720 */ 721 static void __attach_bond_to_agg(struct port *port) 722 { 723 port=NULL; // just to satisfy the compiler 724 // This function does nothing since the parser/multiplexer of the receive 725 // and the parser/multiplexer of the aggregator are already combined 726 } 727 728 /** 729 * __detach_bond_from_agg 730 * @port: the port we're looking at 731 * 732 * Handle the detaching of the port's control parser/multiplexer from the 733 * aggregator. This function does nothing since the parser/multiplexer of the 734 * receive and the parser/multiplexer of the aggregator are already combined. 735 */ 736 static void __detach_bond_from_agg(struct port *port) 737 { 738 port=NULL; // just to satisfy the compiler 739 // This function does nothing sience the parser/multiplexer of the receive 740 // and the parser/multiplexer of the aggregator are already combined 741 } 742 743 /** 744 * __agg_ports_are_ready - check if all ports in an aggregator are ready 745 * @aggregator: the aggregator we're looking at 746 * 747 */ 748 static int __agg_ports_are_ready(struct aggregator *aggregator) 749 { 750 struct port *port; 751 int retval = 1; 752 753 if (aggregator) { 754 // scan all ports in this aggregator to verfy if they are all ready 755 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 756 if (!(port->sm_vars & AD_PORT_READY_N)) { 757 retval = 0; 758 break; 759 } 760 } 761 } 762 763 return retval; 764 } 765 766 /** 767 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 768 * @aggregator: the aggregator we're looking at 769 * @val: Should the ports' ready bit be set on or off 770 * 771 */ 772 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 773 { 774 struct port *port; 775 776 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 777 if (val) { 778 port->sm_vars |= AD_PORT_READY; 779 } else { 780 port->sm_vars &= ~AD_PORT_READY; 781 } 782 } 783 } 784 785 /** 786 * __get_agg_bandwidth - get the total bandwidth of an aggregator 787 * @aggregator: the aggregator we're looking at 788 * 789 */ 790 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 791 { 792 u32 bandwidth=0; 793 u32 basic_speed; 794 795 if (aggregator->num_of_ports) { 796 basic_speed = __get_link_speed(aggregator->lag_ports); 797 switch (basic_speed) { 798 case AD_LINK_SPEED_BITMASK_1MBPS: 799 bandwidth = aggregator->num_of_ports; 800 break; 801 case AD_LINK_SPEED_BITMASK_10MBPS: 802 bandwidth = aggregator->num_of_ports * 10; 803 break; 804 case AD_LINK_SPEED_BITMASK_100MBPS: 805 bandwidth = aggregator->num_of_ports * 100; 806 break; 807 case AD_LINK_SPEED_BITMASK_1000MBPS: 808 bandwidth = aggregator->num_of_ports * 1000; 809 break; 810 default: 811 bandwidth=0; // to silent the compilor .... 812 } 813 } 814 return bandwidth; 815 } 816 817 /** 818 * __get_active_agg - get the current active aggregator 819 * @aggregator: the aggregator we're looking at 820 * 821 */ 822 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 823 { 824 struct aggregator *retval = NULL; 825 826 for (; aggregator; aggregator = __get_next_agg(aggregator)) { 827 if (aggregator->is_active) { 828 retval = aggregator; 829 break; 830 } 831 } 832 833 return retval; 834 } 835 836 /** 837 * __update_lacpdu_from_port - update a port's lacpdu fields 838 * @port: the port we're looking at 839 * 840 */ 841 static inline void __update_lacpdu_from_port(struct port *port) 842 { 843 struct lacpdu *lacpdu = &port->lacpdu; 844 845 /* update current actual Actor parameters */ 846 /* lacpdu->subtype initialized 847 * lacpdu->version_number initialized 848 * lacpdu->tlv_type_actor_info initialized 849 * lacpdu->actor_information_length initialized 850 */ 851 852 lacpdu->actor_system_priority = port->actor_system_priority; 853 lacpdu->actor_system = port->actor_system; 854 lacpdu->actor_key = port->actor_oper_port_key; 855 lacpdu->actor_port_priority = port->actor_port_priority; 856 lacpdu->actor_port = port->actor_port_number; 857 lacpdu->actor_state = port->actor_oper_port_state; 858 859 /* lacpdu->reserved_3_1 initialized 860 * lacpdu->tlv_type_partner_info initialized 861 * lacpdu->partner_information_length initialized 862 */ 863 864 lacpdu->partner_system_priority = port->partner_oper_system_priority; 865 lacpdu->partner_system = port->partner_oper_system; 866 lacpdu->partner_key = port->partner_oper_key; 867 lacpdu->partner_port_priority = port->partner_oper_port_priority; 868 lacpdu->partner_port = port->partner_oper_port_number; 869 lacpdu->partner_state = port->partner_oper_port_state; 870 871 /* lacpdu->reserved_3_2 initialized 872 * lacpdu->tlv_type_collector_info initialized 873 * lacpdu->collector_information_length initialized 874 * collector_max_delay initialized 875 * reserved_12[12] initialized 876 * tlv_type_terminator initialized 877 * terminator_length initialized 878 * reserved_50[50] initialized 879 */ 880 881 /* Convert all non u8 parameters to Big Endian for transmit */ 882 __ntohs_lacpdu(lacpdu); 883 } 884 885 ////////////////////////////////////////////////////////////////////////////////////// 886 // ================= main 802.3ad protocol code ====================================== 887 ////////////////////////////////////////////////////////////////////////////////////// 888 889 /** 890 * ad_lacpdu_send - send out a lacpdu packet on a given port 891 * @port: the port we're looking at 892 * 893 * Returns: 0 on success 894 * < 0 on error 895 */ 896 static int ad_lacpdu_send(struct port *port) 897 { 898 struct slave *slave = port->slave; 899 struct sk_buff *skb; 900 struct lacpdu_header *lacpdu_header; 901 int length = sizeof(struct lacpdu_header); 902 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR; 903 904 skb = dev_alloc_skb(length); 905 if (!skb) { 906 return -ENOMEM; 907 } 908 909 skb->dev = slave->dev; 910 skb->mac.raw = skb->data; 911 skb->nh.raw = skb->data + ETH_HLEN; 912 skb->protocol = PKT_TYPE_LACPDU; 913 skb->priority = TC_PRIO_CONTROL; 914 915 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 916 917 lacpdu_header->ad_header.destination_address = lacpdu_multicast_address; 918 /* Note: source addres is set to be the member's PERMANENT address, because we use it 919 to identify loopback lacpdus in receive. */ 920 lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr)); 921 lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU; 922 923 lacpdu_header->lacpdu = port->lacpdu; // struct copy 924 925 dev_queue_xmit(skb); 926 927 return 0; 928 } 929 930 /** 931 * ad_marker_send - send marker information/response on a given port 932 * @port: the port we're looking at 933 * @marker: marker data to send 934 * 935 * Returns: 0 on success 936 * < 0 on error 937 */ 938 static int ad_marker_send(struct port *port, struct marker *marker) 939 { 940 struct slave *slave = port->slave; 941 struct sk_buff *skb; 942 struct marker_header *marker_header; 943 int length = sizeof(struct marker_header); 944 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR; 945 946 skb = dev_alloc_skb(length + 16); 947 if (!skb) { 948 return -ENOMEM; 949 } 950 951 skb_reserve(skb, 16); 952 953 skb->dev = slave->dev; 954 skb->mac.raw = skb->data; 955 skb->nh.raw = skb->data + ETH_HLEN; 956 skb->protocol = PKT_TYPE_LACPDU; 957 958 marker_header = (struct marker_header *)skb_put(skb, length); 959 960 marker_header->ad_header.destination_address = lacpdu_multicast_address; 961 /* Note: source addres is set to be the member's PERMANENT address, because we use it 962 to identify loopback MARKERs in receive. */ 963 marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr)); 964 marker_header->ad_header.length_type = PKT_TYPE_LACPDU; 965 966 marker_header->marker = *marker; // struct copy 967 968 dev_queue_xmit(skb); 969 970 return 0; 971 } 972 973 /** 974 * ad_mux_machine - handle a port's mux state machine 975 * @port: the port we're looking at 976 * 977 */ 978 static void ad_mux_machine(struct port *port) 979 { 980 mux_states_t last_state; 981 982 // keep current State Machine state to compare later if it was changed 983 last_state = port->sm_mux_state; 984 985 if (port->sm_vars & AD_PORT_BEGIN) { 986 port->sm_mux_state = AD_MUX_DETACHED; // next state 987 } else { 988 switch (port->sm_mux_state) { 989 case AD_MUX_DETACHED: 990 if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY 991 port->sm_mux_state = AD_MUX_WAITING; // next state 992 } 993 break; 994 case AD_MUX_WAITING: 995 // if SELECTED == FALSE return to DETACH state 996 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED 997 port->sm_vars &= ~AD_PORT_READY_N; 998 // in order to withhold the Selection Logic to check all ports READY_N value 999 // every callback cycle to update ready variable, we check READY_N and update READY here 1000 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1001 port->sm_mux_state = AD_MUX_DETACHED; // next state 1002 break; 1003 } 1004 1005 // check if the wait_while_timer expired 1006 if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) { 1007 port->sm_vars |= AD_PORT_READY_N; 1008 } 1009 1010 // in order to withhold the selection logic to check all ports READY_N value 1011 // every callback cycle to update ready variable, we check READY_N and update READY here 1012 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1013 1014 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state 1015 if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) { 1016 port->sm_mux_state = AD_MUX_ATTACHED; // next state 1017 } 1018 break; 1019 case AD_MUX_ATTACHED: 1020 // check also if agg_select_timer expired(so the edable port will take place only after this timer) 1021 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { 1022 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state 1023 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY 1024 port->sm_vars &= ~AD_PORT_READY_N; 1025 // in order to withhold the selection logic to check all ports READY_N value 1026 // every callback cycle to update ready variable, we check READY_N and update READY here 1027 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1028 port->sm_mux_state = AD_MUX_DETACHED;// next state 1029 } 1030 break; 1031 case AD_MUX_COLLECTING_DISTRIBUTING: 1032 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || 1033 !(port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) 1034 ) { 1035 port->sm_mux_state = AD_MUX_ATTACHED;// next state 1036 1037 } else { 1038 // if port state hasn't changed make 1039 // sure that a collecting distributing 1040 // port in an active aggregator is enabled 1041 if (port->aggregator && 1042 port->aggregator->is_active && 1043 !__port_is_enabled(port)) { 1044 1045 __enable_port(port); 1046 } 1047 } 1048 break; 1049 default: //to silence the compiler 1050 break; 1051 } 1052 } 1053 1054 // check if the state machine was changed 1055 if (port->sm_mux_state != last_state) { 1056 dprintk("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state); 1057 switch (port->sm_mux_state) { 1058 case AD_MUX_DETACHED: 1059 __detach_bond_from_agg(port); 1060 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1061 ad_disable_collecting_distributing(port); 1062 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1063 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1064 port->ntt = 1; 1065 break; 1066 case AD_MUX_WAITING: 1067 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1068 break; 1069 case AD_MUX_ATTACHED: 1070 __attach_bond_to_agg(port); 1071 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 1072 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1073 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1074 ad_disable_collecting_distributing(port); 1075 port->ntt = 1; 1076 break; 1077 case AD_MUX_COLLECTING_DISTRIBUTING: 1078 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1079 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1080 ad_enable_collecting_distributing(port); 1081 port->ntt = 1; 1082 break; 1083 default: //to silence the compiler 1084 break; 1085 } 1086 } 1087 } 1088 1089 /** 1090 * ad_rx_machine - handle a port's rx State Machine 1091 * @lacpdu: the lacpdu we've received 1092 * @port: the port we're looking at 1093 * 1094 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1095 * CURRENT. If timer expired set the state machine in the proper state. 1096 * In other cases, this function checks if we need to switch to other state. 1097 */ 1098 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1099 { 1100 rx_states_t last_state; 1101 1102 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback) 1103 __get_rx_machine_lock(port); 1104 1105 // keep current State Machine state to compare later if it was changed 1106 last_state = port->sm_rx_state; 1107 1108 // check if state machine should change state 1109 // first, check if port was reinitialized 1110 if (port->sm_vars & AD_PORT_BEGIN) { 1111 port->sm_rx_state = AD_RX_INITIALIZE; // next state 1112 } 1113 // check if port is not enabled 1114 else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) { 1115 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state 1116 } 1117 // check if new lacpdu arrived 1118 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { 1119 port->sm_rx_timer_counter = 0; // zero timer 1120 port->sm_rx_state = AD_RX_CURRENT; 1121 } else { 1122 // if timer is on, and if it is expired 1123 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { 1124 switch (port->sm_rx_state) { 1125 case AD_RX_EXPIRED: 1126 port->sm_rx_state = AD_RX_DEFAULTED; // next state 1127 break; 1128 case AD_RX_CURRENT: 1129 port->sm_rx_state = AD_RX_EXPIRED; // next state 1130 break; 1131 default: //to silence the compiler 1132 break; 1133 } 1134 } else { 1135 // if no lacpdu arrived and no timer is on 1136 switch (port->sm_rx_state) { 1137 case AD_RX_PORT_DISABLED: 1138 if (port->sm_vars & AD_PORT_MOVED) { 1139 port->sm_rx_state = AD_RX_INITIALIZE; // next state 1140 } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1141 port->sm_rx_state = AD_RX_EXPIRED; // next state 1142 } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) { 1143 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state 1144 } 1145 break; 1146 default: //to silence the compiler 1147 break; 1148 1149 } 1150 } 1151 } 1152 1153 // check if the State machine was changed or new lacpdu arrived 1154 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1155 dprintk("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state); 1156 switch (port->sm_rx_state) { 1157 case AD_RX_INITIALIZE: 1158 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { 1159 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1160 } else { 1161 port->sm_vars |= AD_PORT_LACP_ENABLED; 1162 } 1163 port->sm_vars &= ~AD_PORT_SELECTED; 1164 __record_default(port); 1165 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1166 port->sm_vars &= ~AD_PORT_MOVED; 1167 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state 1168 1169 /*- Fall Through -*/ 1170 1171 case AD_RX_PORT_DISABLED: 1172 port->sm_vars &= ~AD_PORT_MATCHED; 1173 break; 1174 case AD_RX_LACP_DISABLED: 1175 port->sm_vars &= ~AD_PORT_SELECTED; 1176 __record_default(port); 1177 port->partner_oper_port_state &= ~AD_STATE_AGGREGATION; 1178 port->sm_vars |= AD_PORT_MATCHED; 1179 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1180 break; 1181 case AD_RX_EXPIRED: 1182 //Reset of the Synchronization flag. (Standard 43.4.12) 1183 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the 1184 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. 1185 port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1186 port->sm_vars &= ~AD_PORT_MATCHED; 1187 port->partner_oper_port_state |= AD_SHORT_TIMEOUT; 1188 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1189 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1190 break; 1191 case AD_RX_DEFAULTED: 1192 __update_default_selected(port); 1193 __record_default(port); 1194 port->sm_vars |= AD_PORT_MATCHED; 1195 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1196 break; 1197 case AD_RX_CURRENT: 1198 // detect loopback situation 1199 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { 1200 // INFO_RECEIVED_LOOPBACK_FRAMES 1201 printk(KERN_ERR DRV_NAME ": An illegal loopback occurred on adapter (%s)\n", 1202 port->slave->dev->name); 1203 printk(KERN_ERR "Check the configuration to verify that all Adapters " 1204 "are connected to 802.3ad compliant switch ports\n"); 1205 __release_rx_machine_lock(port); 1206 return; 1207 } 1208 __update_selected(lacpdu, port); 1209 __update_ntt(lacpdu, port); 1210 __record_pdu(lacpdu, port); 1211 __choose_matched(lacpdu, port); 1212 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1213 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1214 // verify that if the aggregator is enabled, the port is enabled too. 1215 //(because if the link goes down for a short time, the 802.3ad will not 1216 // catch it, and the port will continue to be disabled) 1217 if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) { 1218 __enable_port(port); 1219 } 1220 break; 1221 default: //to silence the compiler 1222 break; 1223 } 1224 } 1225 __release_rx_machine_lock(port); 1226 } 1227 1228 /** 1229 * ad_tx_machine - handle a port's tx state machine 1230 * @port: the port we're looking at 1231 * 1232 */ 1233 static void ad_tx_machine(struct port *port) 1234 { 1235 // check if tx timer expired, to verify that we do not send more than 3 packets per second 1236 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1237 // check if there is something to send 1238 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1239 __update_lacpdu_from_port(port); 1240 // send the lacpdu 1241 if (ad_lacpdu_send(port) >= 0) { 1242 dprintk("Sent LACPDU on port %d\n", port->actor_port_number); 1243 // mark ntt as false, so it will not be sent again until demanded 1244 port->ntt = 0; 1245 } 1246 } 1247 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND 1248 port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1249 } 1250 } 1251 1252 /** 1253 * ad_periodic_machine - handle a port's periodic state machine 1254 * @port: the port we're looking at 1255 * 1256 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1257 */ 1258 static void ad_periodic_machine(struct port *port) 1259 { 1260 periodic_states_t last_state; 1261 1262 // keep current state machine state to compare later if it was changed 1263 last_state = port->sm_periodic_state; 1264 1265 // check if port was reinitialized 1266 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1267 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper_port_state & AD_STATE_LACP_ACTIVITY)) 1268 ) { 1269 port->sm_periodic_state = AD_NO_PERIODIC; // next state 1270 } 1271 // check if state machine should change state 1272 else if (port->sm_periodic_timer_counter) { 1273 // check if periodic state machine expired 1274 if (!(--port->sm_periodic_timer_counter)) { 1275 // if expired then do tx 1276 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1277 } else { 1278 // If not expired, check if there is some new timeout parameter from the partner state 1279 switch (port->sm_periodic_state) { 1280 case AD_FAST_PERIODIC: 1281 if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { 1282 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1283 } 1284 break; 1285 case AD_SLOW_PERIODIC: 1286 if ((port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { 1287 // stop current timer 1288 port->sm_periodic_timer_counter = 0; 1289 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1290 } 1291 break; 1292 default: //to silence the compiler 1293 break; 1294 } 1295 } 1296 } else { 1297 switch (port->sm_periodic_state) { 1298 case AD_NO_PERIODIC: 1299 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1300 break; 1301 case AD_PERIODIC_TX: 1302 if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { 1303 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1304 } else { 1305 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1306 } 1307 break; 1308 default: //to silence the compiler 1309 break; 1310 } 1311 } 1312 1313 // check if the state machine was changed 1314 if (port->sm_periodic_state != last_state) { 1315 dprintk("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state); 1316 switch (port->sm_periodic_state) { 1317 case AD_NO_PERIODIC: 1318 port->sm_periodic_timer_counter = 0; // zero timer 1319 break; 1320 case AD_FAST_PERIODIC: 1321 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 1322 break; 1323 case AD_SLOW_PERIODIC: 1324 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 1325 break; 1326 case AD_PERIODIC_TX: 1327 port->ntt = 1; 1328 break; 1329 default: //to silence the compiler 1330 break; 1331 } 1332 } 1333 } 1334 1335 /** 1336 * ad_port_selection_logic - select aggregation groups 1337 * @port: the port we're looking at 1338 * 1339 * Select aggregation groups, and assign each port for it's aggregetor. The 1340 * selection logic is called in the inititalization (after all the handshkes), 1341 * and after every lacpdu receive (if selected is off). 1342 */ 1343 static void ad_port_selection_logic(struct port *port) 1344 { 1345 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1346 struct port *last_port = NULL, *curr_port; 1347 int found = 0; 1348 1349 // if the port is already Selected, do nothing 1350 if (port->sm_vars & AD_PORT_SELECTED) { 1351 return; 1352 } 1353 1354 // if the port is connected to other aggregator, detach it 1355 if (port->aggregator) { 1356 // detach the port from its former aggregator 1357 temp_aggregator=port->aggregator; 1358 for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) { 1359 if (curr_port == port) { 1360 temp_aggregator->num_of_ports--; 1361 if (!last_port) {// if it is the first port attached to the aggregator 1362 temp_aggregator->lag_ports=port->next_port_in_aggregator; 1363 } else {// not the first port attached to the aggregator 1364 last_port->next_port_in_aggregator=port->next_port_in_aggregator; 1365 } 1366 1367 // clear the port's relations to this aggregator 1368 port->aggregator = NULL; 1369 port->next_port_in_aggregator=NULL; 1370 port->actor_port_aggregator_identifier=0; 1371 1372 dprintk("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier); 1373 // if the aggregator is empty, clear its parameters, and set it ready to be attached 1374 if (!temp_aggregator->lag_ports) { 1375 ad_clear_agg(temp_aggregator); 1376 } 1377 break; 1378 } 1379 } 1380 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list 1381 printk(KERN_WARNING DRV_NAME ": Warning: Port %d (on %s) was " 1382 "related to aggregator %d but was not on its port list\n", 1383 port->actor_port_number, port->slave->dev->name, 1384 port->aggregator->aggregator_identifier); 1385 } 1386 } 1387 // search on all aggregators for a suitable aggregator for this port 1388 for (aggregator = __get_first_agg(port); aggregator; 1389 aggregator = __get_next_agg(aggregator)) { 1390 1391 // keep a free aggregator for later use(if needed) 1392 if (!aggregator->lag_ports) { 1393 if (!free_aggregator) { 1394 free_aggregator=aggregator; 1395 } 1396 continue; 1397 } 1398 // check if current aggregator suits us 1399 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND 1400 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper_system)) && 1401 (aggregator->partner_system_priority == port->partner_oper_system_priority) && 1402 (aggregator->partner_oper_aggregator_key == port->partner_oper_key) 1403 ) && 1404 ((MAC_ADDRESS_COMPARE(&(port->partner_oper_system), &(null_mac_addr)) && // partner answers 1405 !aggregator->is_individual) // but is not individual OR 1406 ) 1407 ) { 1408 // attach to the founded aggregator 1409 port->aggregator = aggregator; 1410 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; 1411 port->next_port_in_aggregator=aggregator->lag_ports; 1412 port->aggregator->num_of_ports++; 1413 aggregator->lag_ports=port; 1414 dprintk("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1415 1416 // mark this port as selected 1417 port->sm_vars |= AD_PORT_SELECTED; 1418 found = 1; 1419 break; 1420 } 1421 } 1422 1423 // the port couldn't find an aggregator - attach it to a new aggregator 1424 if (!found) { 1425 if (free_aggregator) { 1426 // assign port a new aggregator 1427 port->aggregator = free_aggregator; 1428 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; 1429 1430 // update the new aggregator's parameters 1431 // if port was responsed from the end-user 1432 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex 1433 port->aggregator->is_individual = 0; 1434 } else { 1435 port->aggregator->is_individual = 1; 1436 } 1437 1438 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; 1439 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; 1440 port->aggregator->partner_system=port->partner_oper_system; 1441 port->aggregator->partner_system_priority = port->partner_oper_system_priority; 1442 port->aggregator->partner_oper_aggregator_key = port->partner_oper_key; 1443 port->aggregator->receive_state = 1; 1444 port->aggregator->transmit_state = 1; 1445 port->aggregator->lag_ports = port; 1446 port->aggregator->num_of_ports++; 1447 1448 // mark this port as selected 1449 port->sm_vars |= AD_PORT_SELECTED; 1450 1451 dprintk("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1452 } else { 1453 printk(KERN_ERR DRV_NAME ": Port %d (on %s) did not find a suitable aggregator\n", 1454 port->actor_port_number, port->slave->dev->name); 1455 } 1456 } 1457 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports 1458 // else set ready=FALSE in all aggregator's ports 1459 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1460 1461 if (!__check_agg_selection_timer(port) && (aggregator = __get_first_agg(port))) { 1462 ad_agg_selection_logic(aggregator); 1463 } 1464 } 1465 1466 /** 1467 * ad_agg_selection_logic - select an aggregation group for a team 1468 * @aggregator: the aggregator we're looking at 1469 * 1470 * It is assumed that only one aggregator may be selected for a team. 1471 * The logic of this function is to select (at first time) the aggregator with 1472 * the most ports attached to it, and to reselect the active aggregator only if 1473 * the previous aggregator has no more ports related to it. 1474 * 1475 * FIXME: this function MUST be called with the first agg in the bond, or 1476 * __get_active_agg() won't work correctly. This function should be better 1477 * called with the bond itself, and retrieve the first agg from it. 1478 */ 1479 static void ad_agg_selection_logic(struct aggregator *aggregator) 1480 { 1481 struct aggregator *best_aggregator = NULL, *active_aggregator = NULL; 1482 struct aggregator *last_active_aggregator = NULL, *origin_aggregator; 1483 struct port *port; 1484 u16 num_of_aggs=0; 1485 1486 origin_aggregator = aggregator; 1487 1488 //get current active aggregator 1489 last_active_aggregator = __get_active_agg(aggregator); 1490 1491 // search for the aggregator with the most ports attached to it. 1492 do { 1493 // count how many candidate lag's we have 1494 if (aggregator->lag_ports) { 1495 num_of_aggs++; 1496 } 1497 if (aggregator->is_active && !aggregator->is_individual && // if current aggregator is the active aggregator 1498 MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr))) { // and partner answers to 802.3ad PDUs 1499 if (aggregator->num_of_ports) { // if any ports attached to the current aggregator 1500 best_aggregator=NULL; // disregard the best aggregator that was chosen by now 1501 break; // stop the selection of other aggregator if there are any ports attached to this active aggregator 1502 } else { // no ports attached to this active aggregator 1503 aggregator->is_active = 0; // mark this aggregator as not active anymore 1504 } 1505 } 1506 if (aggregator->num_of_ports) { // if any ports attached 1507 if (best_aggregator) { // if there is a candidte aggregator 1508 //The reasons for choosing new best aggregator: 1509 // 1. if current agg is NOT individual and the best agg chosen so far is individual OR 1510 // current and best aggs are both individual or both not individual, AND 1511 // 2a. current agg partner reply but best agg partner do not reply OR 1512 // 2b. current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply AND 1513 // current has more ports/bandwidth, or same amount of ports but current has faster ports, THEN 1514 // current agg become best agg so far 1515 1516 //if current agg is NOT individual and the best agg chosen so far is individual change best_aggregator 1517 if (!aggregator->is_individual && best_aggregator->is_individual) { 1518 best_aggregator=aggregator; 1519 } 1520 // current and best aggs are both individual or both not individual 1521 else if ((aggregator->is_individual && best_aggregator->is_individual) || 1522 (!aggregator->is_individual && !best_aggregator->is_individual)) { 1523 // current and best aggs are both individual or both not individual AND 1524 // current agg partner reply but best agg partner do not reply 1525 if ((MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) && 1526 !MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) { 1527 best_aggregator=aggregator; 1528 } 1529 // current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply 1530 else if (! (!MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) && 1531 MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) { 1532 if ((__get_agg_selection_mode(aggregator->lag_ports) == AD_BANDWIDTH)&& 1533 (__get_agg_bandwidth(aggregator) > __get_agg_bandwidth(best_aggregator))) { 1534 best_aggregator=aggregator; 1535 } else if (__get_agg_selection_mode(aggregator->lag_ports) == AD_COUNT) { 1536 if (((aggregator->num_of_ports > best_aggregator->num_of_ports) && 1537 (aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS))|| 1538 ((aggregator->num_of_ports == best_aggregator->num_of_ports) && 1539 ((u16)(aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS) > 1540 (u16)(best_aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS)))) { 1541 best_aggregator=aggregator; 1542 } 1543 } 1544 } 1545 } 1546 } else { 1547 best_aggregator=aggregator; 1548 } 1549 } 1550 aggregator->is_active = 0; // mark all aggregators as not active anymore 1551 } while ((aggregator = __get_next_agg(aggregator))); 1552 1553 // if we have new aggregator selected, don't replace the old aggregator if it has an answering partner, 1554 // or if both old aggregator and new aggregator don't have answering partner 1555 if (best_aggregator) { 1556 if (last_active_aggregator && last_active_aggregator->lag_ports && last_active_aggregator->lag_ports->is_enabled && 1557 (MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) || // partner answers OR 1558 (!MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) && // both old and new 1559 !MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) // partner do not answer 1560 ) { 1561 // if new aggregator has link, and old aggregator does not, replace old aggregator.(do nothing) 1562 // -> don't replace otherwise. 1563 if (!(!last_active_aggregator->actor_oper_aggregator_key && best_aggregator->actor_oper_aggregator_key)) { 1564 best_aggregator=NULL; 1565 last_active_aggregator->is_active = 1; // don't replace good old aggregator 1566 1567 } 1568 } 1569 } 1570 1571 // if there is new best aggregator, activate it 1572 if (best_aggregator) { 1573 for (aggregator = __get_first_agg(best_aggregator->lag_ports); 1574 aggregator; 1575 aggregator = __get_next_agg(aggregator)) { 1576 1577 dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n", 1578 aggregator->aggregator_identifier, aggregator->num_of_ports, 1579 aggregator->actor_oper_aggregator_key, aggregator->partner_oper_aggregator_key, 1580 aggregator->is_individual, aggregator->is_active); 1581 } 1582 1583 // check if any partner replys 1584 if (best_aggregator->is_individual) { 1585 printk(KERN_WARNING DRV_NAME ": Warning: No 802.3ad response from the link partner " 1586 "for any adapters in the bond\n"); 1587 } 1588 1589 // check if there are more than one aggregator 1590 if (num_of_aggs > 1) { 1591 dprintk("Warning: More than one Link Aggregation Group was " 1592 "found in the bond. Only one group will function in the bond\n"); 1593 } 1594 1595 best_aggregator->is_active = 1; 1596 dprintk("LAG %d choosed as the active LAG\n", best_aggregator->aggregator_identifier); 1597 dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n", 1598 best_aggregator->aggregator_identifier, best_aggregator->num_of_ports, 1599 best_aggregator->actor_oper_aggregator_key, best_aggregator->partner_oper_aggregator_key, 1600 best_aggregator->is_individual, best_aggregator->is_active); 1601 1602 // disable the ports that were related to the former active_aggregator 1603 if (last_active_aggregator) { 1604 for (port=last_active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 1605 __disable_port(port); 1606 } 1607 } 1608 } 1609 1610 // if the selected aggregator is of join individuals(partner_system is NULL), enable their ports 1611 active_aggregator = __get_active_agg(origin_aggregator); 1612 1613 if (active_aggregator) { 1614 if (!MAC_ADDRESS_COMPARE(&(active_aggregator->partner_system), &(null_mac_addr))) { 1615 for (port=active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 1616 __enable_port(port); 1617 } 1618 } 1619 } 1620 } 1621 1622 /** 1623 * ad_clear_agg - clear a given aggregator's parameters 1624 * @aggregator: the aggregator we're looking at 1625 * 1626 */ 1627 static void ad_clear_agg(struct aggregator *aggregator) 1628 { 1629 if (aggregator) { 1630 aggregator->is_individual = 0; 1631 aggregator->actor_admin_aggregator_key = 0; 1632 aggregator->actor_oper_aggregator_key = 0; 1633 aggregator->partner_system = null_mac_addr; 1634 aggregator->partner_system_priority = 0; 1635 aggregator->partner_oper_aggregator_key = 0; 1636 aggregator->receive_state = 0; 1637 aggregator->transmit_state = 0; 1638 aggregator->lag_ports = NULL; 1639 aggregator->is_active = 0; 1640 aggregator->num_of_ports = 0; 1641 dprintk("LAG %d was cleared\n", aggregator->aggregator_identifier); 1642 } 1643 } 1644 1645 /** 1646 * ad_initialize_agg - initialize a given aggregator's parameters 1647 * @aggregator: the aggregator we're looking at 1648 * 1649 */ 1650 static void ad_initialize_agg(struct aggregator *aggregator) 1651 { 1652 if (aggregator) { 1653 ad_clear_agg(aggregator); 1654 1655 aggregator->aggregator_mac_address = null_mac_addr; 1656 aggregator->aggregator_identifier = 0; 1657 aggregator->slave = NULL; 1658 } 1659 } 1660 1661 /** 1662 * ad_initialize_port - initialize a given port's parameters 1663 * @aggregator: the aggregator we're looking at 1664 * @lacp_fast: boolean. whether fast periodic should be used 1665 * 1666 */ 1667 static void ad_initialize_port(struct port *port, int lacp_fast) 1668 { 1669 if (port) { 1670 port->actor_port_number = 1; 1671 port->actor_port_priority = 0xff; 1672 port->actor_system = null_mac_addr; 1673 port->actor_system_priority = 0xffff; 1674 port->actor_port_aggregator_identifier = 0; 1675 port->ntt = 0; 1676 port->actor_admin_port_key = 1; 1677 port->actor_oper_port_key = 1; 1678 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1679 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1680 1681 if (lacp_fast) { 1682 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1683 } 1684 1685 port->partner_admin_system = null_mac_addr; 1686 port->partner_oper_system = null_mac_addr; 1687 port->partner_admin_system_priority = 0xffff; 1688 port->partner_oper_system_priority = 0xffff; 1689 port->partner_admin_key = 1; 1690 port->partner_oper_key = 1; 1691 port->partner_admin_port_number = 1; 1692 port->partner_oper_port_number = 1; 1693 port->partner_admin_port_priority = 0xff; 1694 port->partner_oper_port_priority = 0xff; 1695 port->partner_admin_port_state = 1; 1696 port->partner_oper_port_state = 1; 1697 port->is_enabled = 1; 1698 // ****** private parameters ****** 1699 port->sm_vars = 0x3; 1700 port->sm_rx_state = 0; 1701 port->sm_rx_timer_counter = 0; 1702 port->sm_periodic_state = 0; 1703 port->sm_periodic_timer_counter = 0; 1704 port->sm_mux_state = 0; 1705 port->sm_mux_timer_counter = 0; 1706 port->sm_tx_state = 0; 1707 port->sm_tx_timer_counter = 0; 1708 port->slave = NULL; 1709 port->aggregator = NULL; 1710 port->next_port_in_aggregator = NULL; 1711 port->transaction_id = 0; 1712 1713 ad_initialize_lacpdu(&(port->lacpdu)); 1714 } 1715 } 1716 1717 /** 1718 * ad_enable_collecting_distributing - enable a port's transmit/receive 1719 * @port: the port we're looking at 1720 * 1721 * Enable @port if it's in an active aggregator 1722 */ 1723 static void ad_enable_collecting_distributing(struct port *port) 1724 { 1725 if (port->aggregator->is_active) { 1726 dprintk("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1727 __enable_port(port); 1728 } 1729 } 1730 1731 /** 1732 * ad_disable_collecting_distributing - disable a port's transmit/receive 1733 * @port: the port we're looking at 1734 * 1735 */ 1736 static void ad_disable_collecting_distributing(struct port *port) 1737 { 1738 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { 1739 dprintk("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1740 __disable_port(port); 1741 } 1742 } 1743 1744 #if 0 1745 /** 1746 * ad_marker_info_send - send a marker information frame 1747 * @port: the port we're looking at 1748 * 1749 * This function does nothing since we decided not to implement send and handle 1750 * response for marker PDU's, in this stage, but only to respond to marker 1751 * information. 1752 */ 1753 static void ad_marker_info_send(struct port *port) 1754 { 1755 struct marker marker; 1756 u16 index; 1757 1758 // fill the marker PDU with the appropriate values 1759 marker.subtype = 0x02; 1760 marker.version_number = 0x01; 1761 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; 1762 marker.marker_length = 0x16; 1763 // convert requester_port to Big Endian 1764 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); 1765 marker.requester_system = port->actor_system; 1766 // convert requester_port(u32) to Big Endian 1767 marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24)); 1768 marker.pad = 0; 1769 marker.tlv_type_terminator = 0x00; 1770 marker.terminator_length = 0x00; 1771 for (index=0; index<90; index++) { 1772 marker.reserved_90[index]=0; 1773 } 1774 1775 // send the marker information 1776 if (ad_marker_send(port, &marker) >= 0) { 1777 dprintk("Sent Marker Information on port %d\n", port->actor_port_number); 1778 } 1779 } 1780 #endif 1781 1782 /** 1783 * ad_marker_info_received - handle receive of a Marker information frame 1784 * @marker_info: Marker info received 1785 * @port: the port we're looking at 1786 * 1787 */ 1788 static void ad_marker_info_received(struct marker *marker_info,struct port *port) 1789 { 1790 struct marker marker; 1791 1792 // copy the received marker data to the response marker 1793 //marker = *marker_info; 1794 memcpy(&marker, marker_info, sizeof(struct marker)); 1795 // change the marker subtype to marker response 1796 marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE; 1797 // send the marker response 1798 1799 if (ad_marker_send(port, &marker) >= 0) { 1800 dprintk("Sent Marker Response on port %d\n", port->actor_port_number); 1801 } 1802 } 1803 1804 /** 1805 * ad_marker_response_received - handle receive of a marker response frame 1806 * @marker: marker PDU received 1807 * @port: the port we're looking at 1808 * 1809 * This function does nothing since we decided not to implement send and handle 1810 * response for marker PDU's, in this stage, but only to respond to marker 1811 * information. 1812 */ 1813 static void ad_marker_response_received(struct marker *marker, struct port *port) 1814 { 1815 marker=NULL; // just to satisfy the compiler 1816 port=NULL; // just to satisfy the compiler 1817 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW 1818 } 1819 1820 /** 1821 * ad_initialize_lacpdu - initialize a given lacpdu structure 1822 * @lacpdu: lacpdu structure to initialize 1823 * 1824 */ 1825 static void ad_initialize_lacpdu(struct lacpdu *lacpdu) 1826 { 1827 u16 index; 1828 1829 // initialize lacpdu data 1830 lacpdu->subtype = 0x01; 1831 lacpdu->version_number = 0x01; 1832 lacpdu->tlv_type_actor_info = 0x01; 1833 lacpdu->actor_information_length = 0x14; 1834 // lacpdu->actor_system_priority updated on send 1835 // lacpdu->actor_system updated on send 1836 // lacpdu->actor_key updated on send 1837 // lacpdu->actor_port_priority updated on send 1838 // lacpdu->actor_port updated on send 1839 // lacpdu->actor_state updated on send 1840 lacpdu->tlv_type_partner_info = 0x02; 1841 lacpdu->partner_information_length = 0x14; 1842 for (index=0; index<=2; index++) { 1843 lacpdu->reserved_3_1[index]=0; 1844 } 1845 // lacpdu->partner_system_priority updated on send 1846 // lacpdu->partner_system updated on send 1847 // lacpdu->partner_key updated on send 1848 // lacpdu->partner_port_priority updated on send 1849 // lacpdu->partner_port updated on send 1850 // lacpdu->partner_state updated on send 1851 for (index=0; index<=2; index++) { 1852 lacpdu->reserved_3_2[index]=0; 1853 } 1854 lacpdu->tlv_type_collector_info = 0x03; 1855 lacpdu->collector_information_length= 0x10; 1856 lacpdu->collector_max_delay = AD_COLLECTOR_MAX_DELAY; 1857 for (index=0; index<=11; index++) { 1858 lacpdu->reserved_12[index]=0; 1859 } 1860 lacpdu->tlv_type_terminator = 0x00; 1861 lacpdu->terminator_length = 0; 1862 for (index=0; index<=49; index++) { 1863 lacpdu->reserved_50[index]=0; 1864 } 1865 } 1866 1867 ////////////////////////////////////////////////////////////////////////////////////// 1868 // ================= AD exported functions to the main bonding code ================== 1869 ////////////////////////////////////////////////////////////////////////////////////// 1870 1871 // Check aggregators status in team every T seconds 1872 #define AD_AGGREGATOR_SELECTION_TIMER 8 1873 1874 static u16 aggregator_identifier; 1875 1876 /** 1877 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1878 * @bond: bonding struct to work on 1879 * @tick_resolution: tick duration (millisecond resolution) 1880 * @lacp_fast: boolean. whether fast periodic should be used 1881 * 1882 * Can be called only after the mac address of the bond is set. 1883 */ 1884 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast) 1885 { 1886 // check that the bond is not initialized yet 1887 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) { 1888 1889 aggregator_identifier = 0; 1890 1891 BOND_AD_INFO(bond).lacp_fast = lacp_fast; 1892 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; 1893 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); 1894 1895 // initialize how many times this module is called in one second(should be about every 100ms) 1896 ad_ticks_per_sec = tick_resolution; 1897 1898 // initialize the aggregator selection timer(to activate an aggregation selection after initialize) 1899 BOND_AD_INFO(bond).agg_select_timer = (AD_AGGREGATOR_SELECTION_TIMER * ad_ticks_per_sec); 1900 BOND_AD_INFO(bond).agg_select_mode = AD_BANDWIDTH; 1901 } 1902 } 1903 1904 /** 1905 * bond_3ad_bind_slave - initialize a slave's port 1906 * @slave: slave struct to work on 1907 * 1908 * Returns: 0 on success 1909 * < 0 on error 1910 */ 1911 int bond_3ad_bind_slave(struct slave *slave) 1912 { 1913 struct bonding *bond = bond_get_bond_by_slave(slave); 1914 struct port *port; 1915 struct aggregator *aggregator; 1916 1917 if (bond == NULL) { 1918 printk(KERN_ERR "The slave %s is not attached to its bond\n", slave->dev->name); 1919 return -1; 1920 } 1921 1922 //check that the slave has not been intialized yet. 1923 if (SLAVE_AD_INFO(slave).port.slave != slave) { 1924 1925 // port initialization 1926 port = &(SLAVE_AD_INFO(slave).port); 1927 1928 ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast); 1929 1930 port->slave = slave; 1931 port->actor_port_number = SLAVE_AD_INFO(slave).id; 1932 // key is determined according to the link speed, duplex and user key(which is yet not supported) 1933 // ------------------------------------------------------------ 1934 // Port key : | User key | Speed |Duplex| 1935 // ------------------------------------------------------------ 1936 // 16 6 1 0 1937 port->actor_admin_port_key = 0; // initialize this parameter 1938 port->actor_admin_port_key |= __get_duplex(port); 1939 port->actor_admin_port_key |= (__get_link_speed(port) << 1); 1940 port->actor_oper_port_key = port->actor_admin_port_key; 1941 // if the port is not full duplex, then the port should be not lacp Enabled 1942 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { 1943 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1944 } 1945 // actor system is the bond's system 1946 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 1947 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) 1948 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1949 port->aggregator = NULL; 1950 port->next_port_in_aggregator = NULL; 1951 1952 __disable_port(port); 1953 __initialize_port_locks(port); 1954 1955 1956 // aggregator initialization 1957 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1958 1959 ad_initialize_agg(aggregator); 1960 1961 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 1962 aggregator->aggregator_identifier = (++aggregator_identifier); 1963 aggregator->slave = slave; 1964 aggregator->is_active = 0; 1965 aggregator->num_of_ports = 0; 1966 } 1967 1968 return 0; 1969 } 1970 1971 /** 1972 * bond_3ad_unbind_slave - deinitialize a slave's port 1973 * @slave: slave struct to work on 1974 * 1975 * Search for the aggregator that is related to this port, remove the 1976 * aggregator and assign another aggregator for other port related to it 1977 * (if any), and remove the port. 1978 */ 1979 void bond_3ad_unbind_slave(struct slave *slave) 1980 { 1981 struct port *port, *prev_port, *temp_port; 1982 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 1983 int select_new_active_agg = 0; 1984 1985 // find the aggregator related to this slave 1986 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1987 1988 // find the port related to this slave 1989 port = &(SLAVE_AD_INFO(slave).port); 1990 1991 // if slave is null, the whole port is not initialized 1992 if (!port->slave) { 1993 printk(KERN_WARNING DRV_NAME ": Trying to unbind an uninitialized port on %s\n", slave->dev->name); 1994 return; 1995 } 1996 1997 dprintk("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier); 1998 1999 /* Tell the partner that this port is not suitable for aggregation */ 2000 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 2001 __update_lacpdu_from_port(port); 2002 ad_lacpdu_send(port); 2003 2004 // check if this aggregator is occupied 2005 if (aggregator->lag_ports) { 2006 // check if there are other ports related to this aggregator except 2007 // the port related to this slave(thats ensure us that there is a 2008 // reason to search for new aggregator, and that we will find one 2009 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { 2010 // find new aggregator for the related port(s) 2011 new_aggregator = __get_first_agg(port); 2012 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) { 2013 // if the new aggregator is empty, or it connected to to our port only 2014 if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) { 2015 break; 2016 } 2017 } 2018 // if new aggregator found, copy the aggregator's parameters 2019 // and connect the related lag_ports to the new aggregator 2020 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2021 dprintk("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier); 2022 2023 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { 2024 printk(KERN_INFO DRV_NAME ": Removing an active aggregator\n"); 2025 // select new active aggregator 2026 select_new_active_agg = 1; 2027 } 2028 2029 new_aggregator->is_individual = aggregator->is_individual; 2030 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2031 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2032 new_aggregator->partner_system = aggregator->partner_system; 2033 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2034 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2035 new_aggregator->receive_state = aggregator->receive_state; 2036 new_aggregator->transmit_state = aggregator->transmit_state; 2037 new_aggregator->lag_ports = aggregator->lag_ports; 2038 new_aggregator->is_active = aggregator->is_active; 2039 new_aggregator->num_of_ports = aggregator->num_of_ports; 2040 2041 // update the information that is written on the ports about the aggregator 2042 for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) { 2043 temp_port->aggregator=new_aggregator; 2044 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2045 } 2046 2047 // clear the aggregator 2048 ad_clear_agg(aggregator); 2049 2050 if (select_new_active_agg) { 2051 ad_agg_selection_logic(__get_first_agg(port)); 2052 } 2053 } else { 2054 printk(KERN_WARNING DRV_NAME ": Warning: unbinding aggregator, " 2055 "and could not find a new aggregator for its ports\n"); 2056 } 2057 } else { // in case that the only port related to this aggregator is the one we want to remove 2058 select_new_active_agg = aggregator->is_active; 2059 // clear the aggregator 2060 ad_clear_agg(aggregator); 2061 if (select_new_active_agg) { 2062 printk(KERN_INFO "Removing an active aggregator\n"); 2063 // select new active aggregator 2064 ad_agg_selection_logic(__get_first_agg(port)); 2065 } 2066 } 2067 } 2068 2069 dprintk("Unbinding port %d\n", port->actor_port_number); 2070 // find the aggregator that this port is connected to 2071 temp_aggregator = __get_first_agg(port); 2072 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) { 2073 prev_port = NULL; 2074 // search the port in the aggregator's related ports 2075 for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) { 2076 if (temp_port == port) { // the aggregator found - detach the port from this aggregator 2077 if (prev_port) { 2078 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2079 } else { 2080 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2081 } 2082 temp_aggregator->num_of_ports--; 2083 if (temp_aggregator->num_of_ports==0) { 2084 select_new_active_agg = temp_aggregator->is_active; 2085 // clear the aggregator 2086 ad_clear_agg(temp_aggregator); 2087 if (select_new_active_agg) { 2088 printk(KERN_INFO "Removing an active aggregator\n"); 2089 // select new active aggregator 2090 ad_agg_selection_logic(__get_first_agg(port)); 2091 } 2092 } 2093 break; 2094 } 2095 } 2096 } 2097 port->slave=NULL; 2098 } 2099 2100 /** 2101 * bond_3ad_state_machine_handler - handle state machines timeout 2102 * @bond: bonding struct to work on 2103 * 2104 * The state machine handling concept in this module is to check every tick 2105 * which state machine should operate any function. The execution order is 2106 * round robin, so when we have an interaction between state machines, the 2107 * reply of one to each other might be delayed until next tick. 2108 * 2109 * This function also complete the initialization when the agg_select_timer 2110 * times out, and it selects an aggregator for the ports that are yet not 2111 * related to any aggregator, and selects the active aggregator for a bond. 2112 */ 2113 void bond_3ad_state_machine_handler(struct bonding *bond) 2114 { 2115 struct port *port; 2116 struct aggregator *aggregator; 2117 2118 read_lock(&bond->lock); 2119 2120 if (bond->kill_timers) { 2121 goto out; 2122 } 2123 2124 //check if there are any slaves 2125 if (bond->slave_cnt == 0) { 2126 goto re_arm; 2127 } 2128 2129 // check if agg_select_timer timer after initialize is timed out 2130 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { 2131 // select the active aggregator for the bond 2132 if ((port = __get_first_port(bond))) { 2133 if (!port->slave) { 2134 printk(KERN_WARNING DRV_NAME ": Warning: bond's first port is uninitialized\n"); 2135 goto re_arm; 2136 } 2137 2138 aggregator = __get_first_agg(port); 2139 ad_agg_selection_logic(aggregator); 2140 } 2141 } 2142 2143 // for each port run the state machines 2144 for (port = __get_first_port(bond); port; port = __get_next_port(port)) { 2145 if (!port->slave) { 2146 printk(KERN_WARNING DRV_NAME ": Warning: Found an uninitialized port\n"); 2147 goto re_arm; 2148 } 2149 2150 ad_rx_machine(NULL, port); 2151 ad_periodic_machine(port); 2152 ad_port_selection_logic(port); 2153 ad_mux_machine(port); 2154 ad_tx_machine(port); 2155 2156 // turn off the BEGIN bit, since we already handled it 2157 if (port->sm_vars & AD_PORT_BEGIN) { 2158 port->sm_vars &= ~AD_PORT_BEGIN; 2159 } 2160 } 2161 2162 re_arm: 2163 mod_timer(&(BOND_AD_INFO(bond).ad_timer), jiffies + ad_delta_in_ticks); 2164 out: 2165 read_unlock(&bond->lock); 2166 } 2167 2168 /** 2169 * bond_3ad_rx_indication - handle a received frame 2170 * @lacpdu: received lacpdu 2171 * @slave: slave struct to work on 2172 * @length: length of the data received 2173 * 2174 * It is assumed that frames that were sent on this NIC don't returned as new 2175 * received frames (loopback). Since only the payload is given to this 2176 * function, it check for loopback. 2177 */ 2178 static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) 2179 { 2180 struct port *port; 2181 2182 if (length >= sizeof(struct lacpdu)) { 2183 2184 port = &(SLAVE_AD_INFO(slave).port); 2185 2186 if (!port->slave) { 2187 printk(KERN_WARNING DRV_NAME ": Warning: port of slave %s is uninitialized\n", slave->dev->name); 2188 return; 2189 } 2190 2191 switch (lacpdu->subtype) { 2192 case AD_TYPE_LACPDU: 2193 __ntohs_lacpdu(lacpdu); 2194 dprintk("Received LACPDU on port %d\n", port->actor_port_number); 2195 ad_rx_machine(lacpdu, port); 2196 break; 2197 2198 case AD_TYPE_MARKER: 2199 // No need to convert fields to Little Endian since we don't use the marker's fields. 2200 2201 switch (((struct marker *)lacpdu)->tlv_type) { 2202 case AD_MARKER_INFORMATION_SUBTYPE: 2203 dprintk("Received Marker Information on port %d\n", port->actor_port_number); 2204 ad_marker_info_received((struct marker *)lacpdu, port); 2205 break; 2206 2207 case AD_MARKER_RESPONSE_SUBTYPE: 2208 dprintk("Received Marker Response on port %d\n", port->actor_port_number); 2209 ad_marker_response_received((struct marker *)lacpdu, port); 2210 break; 2211 2212 default: 2213 dprintk("Received an unknown Marker subtype on slot %d\n", port->actor_port_number); 2214 } 2215 } 2216 } 2217 } 2218 2219 /** 2220 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication 2221 * @slave: slave struct to work on 2222 * 2223 * Handle reselection of aggregator (if needed) for this port. 2224 */ 2225 void bond_3ad_adapter_speed_changed(struct slave *slave) 2226 { 2227 struct port *port; 2228 2229 port = &(SLAVE_AD_INFO(slave).port); 2230 2231 // if slave is null, the whole port is not initialized 2232 if (!port->slave) { 2233 printk(KERN_WARNING DRV_NAME ": Warning: speed changed for uninitialized port on %s\n", 2234 slave->dev->name); 2235 return; 2236 } 2237 2238 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2239 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); 2240 dprintk("Port %d changed speed\n", port->actor_port_number); 2241 // there is no need to reselect a new aggregator, just signal the 2242 // state machines to reinitialize 2243 port->sm_vars |= AD_PORT_BEGIN; 2244 } 2245 2246 /** 2247 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication 2248 * @slave: slave struct to work on 2249 * 2250 * Handle reselection of aggregator (if needed) for this port. 2251 */ 2252 void bond_3ad_adapter_duplex_changed(struct slave *slave) 2253 { 2254 struct port *port; 2255 2256 port=&(SLAVE_AD_INFO(slave).port); 2257 2258 // if slave is null, the whole port is not initialized 2259 if (!port->slave) { 2260 printk(KERN_WARNING DRV_NAME ": Warning: duplex changed for uninitialized port on %s\n", 2261 slave->dev->name); 2262 return; 2263 } 2264 2265 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2266 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); 2267 dprintk("Port %d changed duplex\n", port->actor_port_number); 2268 // there is no need to reselect a new aggregator, just signal the 2269 // state machines to reinitialize 2270 port->sm_vars |= AD_PORT_BEGIN; 2271 } 2272 2273 /** 2274 * bond_3ad_handle_link_change - handle a slave's link status change indication 2275 * @slave: slave struct to work on 2276 * @status: whether the link is now up or down 2277 * 2278 * Handle reselection of aggregator (if needed) for this port. 2279 */ 2280 void bond_3ad_handle_link_change(struct slave *slave, char link) 2281 { 2282 struct port *port; 2283 2284 port = &(SLAVE_AD_INFO(slave).port); 2285 2286 // if slave is null, the whole port is not initialized 2287 if (!port->slave) { 2288 printk(KERN_WARNING DRV_NAME ": Warning: link status changed for uninitialized port on %s\n", 2289 slave->dev->name); 2290 return; 2291 } 2292 2293 // 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) 2294 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report 2295 if (link == BOND_LINK_UP) { 2296 port->is_enabled = 1; 2297 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2298 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); 2299 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2300 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); 2301 } else { 2302 /* link has failed */ 2303 port->is_enabled = 0; 2304 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2305 port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS); 2306 } 2307 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); 2308 // there is no need to reselect a new aggregator, just signal the 2309 // state machines to reinitialize 2310 port->sm_vars |= AD_PORT_BEGIN; 2311 } 2312 2313 /** 2314 * bond_3ad_get_active_agg_info - get information of the active aggregator 2315 * @bond: bonding struct to work on 2316 * @ad_info: ad_info struct to fill with the bond's info 2317 * 2318 * Returns: 0 on success 2319 * < 0 on error 2320 */ 2321 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2322 { 2323 struct aggregator *aggregator = NULL; 2324 struct port *port; 2325 2326 for (port = __get_first_port(bond); port; port = __get_next_port(port)) { 2327 if (port->aggregator && port->aggregator->is_active) { 2328 aggregator = port->aggregator; 2329 break; 2330 } 2331 } 2332 2333 if (aggregator) { 2334 ad_info->aggregator_id = aggregator->aggregator_identifier; 2335 ad_info->ports = aggregator->num_of_ports; 2336 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2337 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2338 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); 2339 return 0; 2340 } 2341 2342 return -1; 2343 } 2344 2345 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) 2346 { 2347 struct slave *slave, *start_at; 2348 struct bonding *bond = dev->priv; 2349 int slave_agg_no; 2350 int slaves_in_agg; 2351 int agg_id; 2352 int i; 2353 struct ad_info ad_info; 2354 int res = 1; 2355 2356 /* make sure that the slaves list will 2357 * not change during tx 2358 */ 2359 read_lock(&bond->lock); 2360 2361 if (!BOND_IS_OK(bond)) { 2362 goto out; 2363 } 2364 2365 if (bond_3ad_get_active_agg_info(bond, &ad_info)) { 2366 printk(KERN_DEBUG "ERROR: bond_3ad_get_active_agg_info failed\n"); 2367 goto out; 2368 } 2369 2370 slaves_in_agg = ad_info.ports; 2371 agg_id = ad_info.aggregator_id; 2372 2373 if (slaves_in_agg == 0) { 2374 /*the aggregator is empty*/ 2375 printk(KERN_DEBUG "ERROR: active aggregator is empty\n"); 2376 goto out; 2377 } 2378 2379 slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg); 2380 2381 bond_for_each_slave(bond, slave, i) { 2382 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; 2383 2384 if (agg && (agg->aggregator_identifier == agg_id)) { 2385 slave_agg_no--; 2386 if (slave_agg_no < 0) { 2387 break; 2388 } 2389 } 2390 } 2391 2392 if (slave_agg_no >= 0) { 2393 printk(KERN_ERR DRV_NAME ": Error: Couldn't find a slave to tx on for aggregator ID %d\n", agg_id); 2394 goto out; 2395 } 2396 2397 start_at = slave; 2398 2399 bond_for_each_slave_from(bond, slave, i, start_at) { 2400 int slave_agg_id = 0; 2401 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; 2402 2403 if (agg) { 2404 slave_agg_id = agg->aggregator_identifier; 2405 } 2406 2407 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) { 2408 res = bond_dev_queue_xmit(bond, skb, slave->dev); 2409 break; 2410 } 2411 } 2412 2413 out: 2414 if (res) { 2415 /* no suitable interface, frame not sent */ 2416 dev_kfree_skb(skb); 2417 } 2418 read_unlock(&bond->lock); 2419 return 0; 2420 } 2421 2422 int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev) 2423 { 2424 struct bonding *bond = dev->priv; 2425 struct slave *slave = NULL; 2426 int ret = NET_RX_DROP; 2427 2428 if (!(dev->flags & IFF_MASTER)) 2429 goto out; 2430 2431 read_lock(&bond->lock); 2432 slave = bond_get_slave_by_dev((struct bonding *)dev->priv, orig_dev); 2433 if (!slave) 2434 goto out_unlock; 2435 2436 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len); 2437 2438 ret = NET_RX_SUCCESS; 2439 2440 out_unlock: 2441 read_unlock(&bond->lock); 2442 out: 2443 dev_kfree_skb(skb); 2444 2445 return ret; 2446 } 2447 2448