1 /* 2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License as published by the Free 6 * Software Foundation; either version 2 of the License, or (at your option) 7 * any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 59 16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 * 18 * The full GNU General Public License is included in this distribution in the 19 * file called LICENSE. 20 * 21 */ 22 23 //#define BONDING_DEBUG 1 24 25 #include <linux/skbuff.h> 26 #include <linux/if_ether.h> 27 #include <linux/netdevice.h> 28 #include <linux/spinlock.h> 29 #include <linux/ethtool.h> 30 #include <linux/if_bonding.h> 31 #include <linux/pkt_sched.h> 32 #include <net/net_namespace.h> 33 #include "bonding.h" 34 #include "bond_3ad.h" 35 36 // General definitions 37 #define AD_SHORT_TIMEOUT 1 38 #define AD_LONG_TIMEOUT 0 39 #define AD_STANDBY 0x2 40 #define AD_MAX_TX_IN_SECOND 3 41 #define AD_COLLECTOR_MAX_DELAY 0 42 43 // Timer definitions(43.4.4 in the 802.3ad standard) 44 #define AD_FAST_PERIODIC_TIME 1 45 #define AD_SLOW_PERIODIC_TIME 30 46 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) 47 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) 48 #define AD_CHURN_DETECTION_TIME 60 49 #define AD_AGGREGATE_WAIT_TIME 2 50 51 // Port state definitions(43.4.2.2 in the 802.3ad standard) 52 #define AD_STATE_LACP_ACTIVITY 0x1 53 #define AD_STATE_LACP_TIMEOUT 0x2 54 #define AD_STATE_AGGREGATION 0x4 55 #define AD_STATE_SYNCHRONIZATION 0x8 56 #define AD_STATE_COLLECTING 0x10 57 #define AD_STATE_DISTRIBUTING 0x20 58 #define AD_STATE_DEFAULTED 0x40 59 #define AD_STATE_EXPIRED 0x80 60 61 // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard) 62 #define AD_PORT_BEGIN 0x1 63 #define AD_PORT_LACP_ENABLED 0x2 64 #define AD_PORT_ACTOR_CHURN 0x4 65 #define AD_PORT_PARTNER_CHURN 0x8 66 #define AD_PORT_READY 0x10 67 #define AD_PORT_READY_N 0x20 68 #define AD_PORT_MATCHED 0x40 69 #define AD_PORT_STANDBY 0x80 70 #define AD_PORT_SELECTED 0x100 71 #define AD_PORT_MOVED 0x200 72 73 // Port Key definitions 74 // key is determined according to the link speed, duplex and 75 // user key(which is yet not supported) 76 // ------------------------------------------------------------ 77 // Port key : | User key | Speed |Duplex| 78 // ------------------------------------------------------------ 79 // 16 6 1 0 80 #define AD_DUPLEX_KEY_BITS 0x1 81 #define AD_SPEED_KEY_BITS 0x3E 82 #define AD_USER_KEY_BITS 0xFFC0 83 84 //dalloun 85 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 86 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 87 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 88 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 89 #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 90 //endalloun 91 92 // compare MAC addresses 93 #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN) 94 95 static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}}; 96 static u16 ad_ticks_per_sec; 97 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 98 99 // ================= 3AD api to bonding and kernel code ================== 100 static u16 __get_link_speed(struct port *port); 101 static u8 __get_duplex(struct port *port); 102 static inline void __initialize_port_locks(struct port *port); 103 //conversions 104 static u16 __ad_timer_to_ticks(u16 timer_type, u16 Par); 105 106 107 // ================= ad code helper functions ================== 108 //needed by ad_rx_machine(...) 109 static void __record_pdu(struct lacpdu *lacpdu, struct port *port); 110 static void __record_default(struct port *port); 111 static void __update_selected(struct lacpdu *lacpdu, struct port *port); 112 static void __update_default_selected(struct port *port); 113 static void __choose_matched(struct lacpdu *lacpdu, struct port *port); 114 static void __update_ntt(struct lacpdu *lacpdu, struct port *port); 115 116 //needed for ad_mux_machine(..) 117 static void __attach_bond_to_agg(struct port *port); 118 static void __detach_bond_from_agg(struct port *port); 119 static int __agg_ports_are_ready(struct aggregator *aggregator); 120 static void __set_agg_ports_ready(struct aggregator *aggregator, int val); 121 122 //needed for ad_agg_selection_logic(...) 123 static u32 __get_agg_bandwidth(struct aggregator *aggregator); 124 static struct aggregator *__get_active_agg(struct aggregator *aggregator); 125 126 127 // ================= main 802.3ad protocol functions ================== 128 static int ad_lacpdu_send(struct port *port); 129 static int ad_marker_send(struct port *port, struct bond_marker *marker); 130 static void ad_mux_machine(struct port *port); 131 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 132 static void ad_tx_machine(struct port *port); 133 static void ad_periodic_machine(struct port *port); 134 static void ad_port_selection_logic(struct port *port); 135 static void ad_agg_selection_logic(struct aggregator *aggregator); 136 static void ad_clear_agg(struct aggregator *aggregator); 137 static void ad_initialize_agg(struct aggregator *aggregator); 138 static void ad_initialize_port(struct port *port, int lacp_fast); 139 static void ad_initialize_lacpdu(struct lacpdu *Lacpdu); 140 static void ad_enable_collecting_distributing(struct port *port); 141 static void ad_disable_collecting_distributing(struct port *port); 142 static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port); 143 static void ad_marker_response_received(struct bond_marker *marker, struct port *port); 144 145 146 ///////////////////////////////////////////////////////////////////////////////// 147 // ================= api to bonding and kernel code ================== 148 ///////////////////////////////////////////////////////////////////////////////// 149 150 /** 151 * __get_bond_by_port - get the port's bonding struct 152 * @port: the port we're looking at 153 * 154 * Return @port's bonding struct, or %NULL if it can't be found. 155 */ 156 static inline struct bonding *__get_bond_by_port(struct port *port) 157 { 158 if (port->slave == NULL) { 159 return NULL; 160 } 161 162 return bond_get_bond_by_slave(port->slave); 163 } 164 165 /** 166 * __get_first_port - get the first port in the bond 167 * @bond: the bond we're looking at 168 * 169 * Return the port of the first slave in @bond, or %NULL if it can't be found. 170 */ 171 static inline struct port *__get_first_port(struct bonding *bond) 172 { 173 if (bond->slave_cnt == 0) { 174 return NULL; 175 } 176 177 return &(SLAVE_AD_INFO(bond->first_slave).port); 178 } 179 180 /** 181 * __get_next_port - get the next port in the bond 182 * @port: the port we're looking at 183 * 184 * Return the port of the slave that is next in line of @port's slave in the 185 * bond, or %NULL if it can't be found. 186 */ 187 static inline struct port *__get_next_port(struct port *port) 188 { 189 struct bonding *bond = __get_bond_by_port(port); 190 struct slave *slave = port->slave; 191 192 // If there's no bond for this port, or this is the last slave 193 if ((bond == NULL) || (slave->next == bond->first_slave)) { 194 return NULL; 195 } 196 197 return &(SLAVE_AD_INFO(slave->next).port); 198 } 199 200 /** 201 * __get_first_agg - get the first aggregator in the bond 202 * @bond: the bond we're looking at 203 * 204 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 205 * found. 206 */ 207 static inline struct aggregator *__get_first_agg(struct port *port) 208 { 209 struct bonding *bond = __get_bond_by_port(port); 210 211 // If there's no bond for this port, or bond has no slaves 212 if ((bond == NULL) || (bond->slave_cnt == 0)) { 213 return NULL; 214 } 215 216 return &(SLAVE_AD_INFO(bond->first_slave).aggregator); 217 } 218 219 /** 220 * __get_next_agg - get the next aggregator in the bond 221 * @aggregator: the aggregator we're looking at 222 * 223 * Return the aggregator of the slave that is next in line of @aggregator's 224 * slave in the bond, or %NULL if it can't be found. 225 */ 226 static inline struct aggregator *__get_next_agg(struct aggregator *aggregator) 227 { 228 struct slave *slave = aggregator->slave; 229 struct bonding *bond = bond_get_bond_by_slave(slave); 230 231 // If there's no bond for this aggregator, or this is the last slave 232 if ((bond == NULL) || (slave->next == bond->first_slave)) { 233 return NULL; 234 } 235 236 return &(SLAVE_AD_INFO(slave->next).aggregator); 237 } 238 239 /** 240 * __disable_port - disable the port's slave 241 * @port: the port we're looking at 242 * 243 */ 244 static inline void __disable_port(struct port *port) 245 { 246 bond_set_slave_inactive_flags(port->slave); 247 } 248 249 /** 250 * __enable_port - enable the port's slave, if it's up 251 * @port: the port we're looking at 252 * 253 */ 254 static inline void __enable_port(struct port *port) 255 { 256 struct slave *slave = port->slave; 257 258 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) { 259 bond_set_slave_active_flags(slave); 260 } 261 } 262 263 /** 264 * __port_is_enabled - check if the port's slave is in active state 265 * @port: the port we're looking at 266 * 267 */ 268 static inline int __port_is_enabled(struct port *port) 269 { 270 return(port->slave->state == BOND_STATE_ACTIVE); 271 } 272 273 /** 274 * __get_agg_selection_mode - get the aggregator selection mode 275 * @port: the port we're looking at 276 * 277 * Get the aggregator selection mode. Can be %BANDWIDTH or %COUNT. 278 */ 279 static inline u32 __get_agg_selection_mode(struct port *port) 280 { 281 struct bonding *bond = __get_bond_by_port(port); 282 283 if (bond == NULL) { 284 return AD_BANDWIDTH; 285 } 286 287 return BOND_AD_INFO(bond).agg_select_mode; 288 } 289 290 /** 291 * __check_agg_selection_timer - check if the selection timer has expired 292 * @port: the port we're looking at 293 * 294 */ 295 static inline int __check_agg_selection_timer(struct port *port) 296 { 297 struct bonding *bond = __get_bond_by_port(port); 298 299 if (bond == NULL) { 300 return 0; 301 } 302 303 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 304 } 305 306 /** 307 * __get_rx_machine_lock - lock the port's RX machine 308 * @port: the port we're looking at 309 * 310 */ 311 static inline void __get_rx_machine_lock(struct port *port) 312 { 313 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 314 } 315 316 /** 317 * __release_rx_machine_lock - unlock the port's RX machine 318 * @port: the port we're looking at 319 * 320 */ 321 static inline void __release_rx_machine_lock(struct port *port) 322 { 323 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 324 } 325 326 /** 327 * __get_link_speed - get a port's speed 328 * @port: the port we're looking at 329 * 330 * Return @port's speed in 802.3ad bitmask format. i.e. one of: 331 * 0, 332 * %AD_LINK_SPEED_BITMASK_10MBPS, 333 * %AD_LINK_SPEED_BITMASK_100MBPS, 334 * %AD_LINK_SPEED_BITMASK_1000MBPS, 335 * %AD_LINK_SPEED_BITMASK_10000MBPS 336 */ 337 static u16 __get_link_speed(struct port *port) 338 { 339 struct slave *slave = port->slave; 340 u16 speed; 341 342 /* this if covers only a special case: when the configuration starts with 343 * link down, it sets the speed to 0. 344 * This is done in spite of the fact that the e100 driver reports 0 to be 345 * compatible with MVT in the future.*/ 346 if (slave->link != BOND_LINK_UP) { 347 speed=0; 348 } else { 349 switch (slave->speed) { 350 case SPEED_10: 351 speed = AD_LINK_SPEED_BITMASK_10MBPS; 352 break; 353 354 case SPEED_100: 355 speed = AD_LINK_SPEED_BITMASK_100MBPS; 356 break; 357 358 case SPEED_1000: 359 speed = AD_LINK_SPEED_BITMASK_1000MBPS; 360 break; 361 362 case SPEED_10000: 363 speed = AD_LINK_SPEED_BITMASK_10000MBPS; 364 break; 365 366 default: 367 speed = 0; // unknown speed value from ethtool. shouldn't happen 368 break; 369 } 370 } 371 372 dprintk("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed); 373 return speed; 374 } 375 376 /** 377 * __get_duplex - get a port's duplex 378 * @port: the port we're looking at 379 * 380 * Return @port's duplex in 802.3ad bitmask format. i.e.: 381 * 0x01 if in full duplex 382 * 0x00 otherwise 383 */ 384 static u8 __get_duplex(struct port *port) 385 { 386 struct slave *slave = port->slave; 387 388 u8 retval; 389 390 // handling a special case: when the configuration starts with 391 // link down, it sets the duplex to 0. 392 if (slave->link != BOND_LINK_UP) { 393 retval=0x0; 394 } else { 395 switch (slave->duplex) { 396 case DUPLEX_FULL: 397 retval=0x1; 398 dprintk("Port %d Received status full duplex update from adapter\n", port->actor_port_number); 399 break; 400 case DUPLEX_HALF: 401 default: 402 retval=0x0; 403 dprintk("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number); 404 break; 405 } 406 } 407 return retval; 408 } 409 410 /** 411 * __initialize_port_locks - initialize a port's RX machine spinlock 412 * @port: the port we're looking at 413 * 414 */ 415 static inline void __initialize_port_locks(struct port *port) 416 { 417 // make sure it isn't called twice 418 spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 419 } 420 421 //conversions 422 423 /** 424 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 425 * @timer_type: which timer to operate 426 * @par: timer parameter. see below 427 * 428 * If @timer_type is %current_while_timer, @par indicates long/short timer. 429 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 430 * %SLOW_PERIODIC_TIME. 431 */ 432 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 433 { 434 u16 retval=0; //to silence the compiler 435 436 switch (timer_type) { 437 case AD_CURRENT_WHILE_TIMER: // for rx machine usage 438 if (par) { // for short or long timeout 439 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout 440 } else { 441 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout 442 } 443 break; 444 case AD_ACTOR_CHURN_TIMER: // for local churn machine 445 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 446 break; 447 case AD_PERIODIC_TIMER: // for periodic machine 448 retval = (par*ad_ticks_per_sec); // long timeout 449 break; 450 case AD_PARTNER_CHURN_TIMER: // for remote churn machine 451 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 452 break; 453 case AD_WAIT_WHILE_TIMER: // for selection machine 454 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 455 break; 456 } 457 return retval; 458 } 459 460 461 ///////////////////////////////////////////////////////////////////////////////// 462 // ================= ad_rx_machine helper functions ================== 463 ///////////////////////////////////////////////////////////////////////////////// 464 465 /** 466 * __record_pdu - record parameters from a received lacpdu 467 * @lacpdu: the lacpdu we've received 468 * @port: the port we're looking at 469 * 470 * Record the parameter values for the Actor carried in a received lacpdu as 471 * the current partner operational parameter values and sets 472 * actor_oper_port_state.defaulted to FALSE. 473 */ 474 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 475 { 476 // validate lacpdu and port 477 if (lacpdu && port) { 478 // record the new parameter values for the partner operational 479 port->partner_oper_port_number = ntohs(lacpdu->actor_port); 480 port->partner_oper_port_priority = ntohs(lacpdu->actor_port_priority); 481 port->partner_oper_system = lacpdu->actor_system; 482 port->partner_oper_system_priority = ntohs(lacpdu->actor_system_priority); 483 port->partner_oper_key = ntohs(lacpdu->actor_key); 484 // zero partener's lase states 485 port->partner_oper_port_state = 0; 486 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_ACTIVITY); 487 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_TIMEOUT); 488 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_AGGREGATION); 489 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION); 490 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_COLLECTING); 491 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DISTRIBUTING); 492 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DEFAULTED); 493 port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_EXPIRED); 494 495 // set actor_oper_port_state.defaulted to FALSE 496 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 497 498 // set the partner sync. to on if the partner is sync. and the port is matched 499 if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 500 port->partner_oper_port_state |= AD_STATE_SYNCHRONIZATION; 501 } else { 502 port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 503 } 504 } 505 } 506 507 /** 508 * __record_default - record default parameters 509 * @port: the port we're looking at 510 * 511 * This function records the default parameter values for the partner carried 512 * in the Partner Admin parameters as the current partner operational parameter 513 * values and sets actor_oper_port_state.defaulted to TRUE. 514 */ 515 static void __record_default(struct port *port) 516 { 517 // validate the port 518 if (port) { 519 // record the partner admin parameters 520 port->partner_oper_port_number = port->partner_admin_port_number; 521 port->partner_oper_port_priority = port->partner_admin_port_priority; 522 port->partner_oper_system = port->partner_admin_system; 523 port->partner_oper_system_priority = port->partner_admin_system_priority; 524 port->partner_oper_key = port->partner_admin_key; 525 port->partner_oper_port_state = port->partner_admin_port_state; 526 527 // set actor_oper_port_state.defaulted to true 528 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 529 } 530 } 531 532 /** 533 * __update_selected - update a port's Selected variable from a received lacpdu 534 * @lacpdu: the lacpdu we've received 535 * @port: the port we're looking at 536 * 537 * Update the value of the selected variable, using parameter values from a 538 * newly received lacpdu. The parameter values for the Actor carried in the 539 * received PDU are compared with the corresponding operational parameter 540 * values for the ports partner. If one or more of the comparisons shows that 541 * the value(s) received in the PDU differ from the current operational values, 542 * then selected is set to FALSE and actor_oper_port_state.synchronization is 543 * set to out_of_sync. Otherwise, selected remains unchanged. 544 */ 545 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 546 { 547 // validate lacpdu and port 548 if (lacpdu && port) { 549 // check if any parameter is different 550 if ((ntohs(lacpdu->actor_port) != port->partner_oper_port_number) || 551 (ntohs(lacpdu->actor_port_priority) != port->partner_oper_port_priority) || 552 MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->partner_oper_system)) || 553 (ntohs(lacpdu->actor_system_priority) != port->partner_oper_system_priority) || 554 (ntohs(lacpdu->actor_key) != port->partner_oper_key) || 555 ((lacpdu->actor_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION)) 556 ) { 557 // update the state machine Selected variable 558 port->sm_vars &= ~AD_PORT_SELECTED; 559 } 560 } 561 } 562 563 /** 564 * __update_default_selected - update a port's Selected variable from Partner 565 * @port: the port we're looking at 566 * 567 * This function updates the value of the selected variable, using the partner 568 * administrative parameter values. The administrative values are compared with 569 * the corresponding operational parameter values for the partner. If one or 570 * more of the comparisons shows that the administrative value(s) differ from 571 * the current operational values, then Selected is set to FALSE and 572 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 573 * Selected remains unchanged. 574 */ 575 static void __update_default_selected(struct port *port) 576 { 577 // validate the port 578 if (port) { 579 // check if any parameter is different 580 if ((port->partner_admin_port_number != port->partner_oper_port_number) || 581 (port->partner_admin_port_priority != port->partner_oper_port_priority) || 582 MAC_ADDRESS_COMPARE(&(port->partner_admin_system), &(port->partner_oper_system)) || 583 (port->partner_admin_system_priority != port->partner_oper_system_priority) || 584 (port->partner_admin_key != port->partner_oper_key) || 585 ((port->partner_admin_port_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION)) 586 ) { 587 // update the state machine Selected variable 588 port->sm_vars &= ~AD_PORT_SELECTED; 589 } 590 } 591 } 592 593 /** 594 * __choose_matched - update a port's matched variable from a received lacpdu 595 * @lacpdu: the lacpdu we've received 596 * @port: the port we're looking at 597 * 598 * Update the value of the matched variable, using parameter values from a 599 * newly received lacpdu. Parameter values for the partner carried in the 600 * received PDU are compared with the corresponding operational parameter 601 * values for the actor. Matched is set to TRUE if all of these parameters 602 * match and the PDU parameter partner_state.aggregation has the same value as 603 * actor_oper_port_state.aggregation and lacp will actively maintain the link 604 * in the aggregation. Matched is also set to TRUE if the value of 605 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 606 * an individual link and lacp will actively maintain the link. Otherwise, 607 * matched is set to FALSE. LACP is considered to be actively maintaining the 608 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 609 * the actor's actor_oper_port_state.lacp_activity and the PDU's 610 * partner_state.lacp_activity variables are TRUE. 611 */ 612 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 613 { 614 // validate lacpdu and port 615 if (lacpdu && port) { 616 // check if all parameters are alike 617 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 618 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 619 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && 620 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 621 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 622 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 623 // or this is individual link(aggregation == FALSE) 624 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 625 ) { 626 // update the state machine Matched variable 627 port->sm_vars |= AD_PORT_MATCHED; 628 } else { 629 port->sm_vars &= ~AD_PORT_MATCHED; 630 } 631 } 632 } 633 634 /** 635 * __update_ntt - update a port's ntt variable from a received lacpdu 636 * @lacpdu: the lacpdu we've received 637 * @port: the port we're looking at 638 * 639 * Updates the value of the ntt variable, using parameter values from a newly 640 * received lacpdu. The parameter values for the partner carried in the 641 * received PDU are compared with the corresponding operational parameter 642 * values for the Actor. If one or more of the comparisons shows that the 643 * value(s) received in the PDU differ from the current operational values, 644 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 645 */ 646 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 647 { 648 // validate lacpdu and port 649 if (lacpdu && port) { 650 // check if any parameter is different 651 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 652 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 653 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || 654 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 655 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 656 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 657 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 658 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 659 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 660 ) { 661 // set ntt to be TRUE 662 port->ntt = 1; 663 } 664 } 665 } 666 667 /** 668 * __attach_bond_to_agg 669 * @port: the port we're looking at 670 * 671 * Handle the attaching of the port's control parser/multiplexer and the 672 * aggregator. This function does nothing since the parser/multiplexer of the 673 * receive and the parser/multiplexer of the aggregator are already combined. 674 */ 675 static void __attach_bond_to_agg(struct port *port) 676 { 677 port=NULL; // just to satisfy the compiler 678 // This function does nothing since the parser/multiplexer of the receive 679 // and the parser/multiplexer of the aggregator are already combined 680 } 681 682 /** 683 * __detach_bond_from_agg 684 * @port: the port we're looking at 685 * 686 * Handle the detaching of the port's control parser/multiplexer from the 687 * aggregator. This function does nothing since the parser/multiplexer of the 688 * receive and the parser/multiplexer of the aggregator are already combined. 689 */ 690 static void __detach_bond_from_agg(struct port *port) 691 { 692 port=NULL; // just to satisfy the compiler 693 // This function does nothing sience the parser/multiplexer of the receive 694 // and the parser/multiplexer of the aggregator are already combined 695 } 696 697 /** 698 * __agg_ports_are_ready - check if all ports in an aggregator are ready 699 * @aggregator: the aggregator we're looking at 700 * 701 */ 702 static int __agg_ports_are_ready(struct aggregator *aggregator) 703 { 704 struct port *port; 705 int retval = 1; 706 707 if (aggregator) { 708 // scan all ports in this aggregator to verfy if they are all ready 709 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 710 if (!(port->sm_vars & AD_PORT_READY_N)) { 711 retval = 0; 712 break; 713 } 714 } 715 } 716 717 return retval; 718 } 719 720 /** 721 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 722 * @aggregator: the aggregator we're looking at 723 * @val: Should the ports' ready bit be set on or off 724 * 725 */ 726 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 727 { 728 struct port *port; 729 730 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 731 if (val) { 732 port->sm_vars |= AD_PORT_READY; 733 } else { 734 port->sm_vars &= ~AD_PORT_READY; 735 } 736 } 737 } 738 739 /** 740 * __get_agg_bandwidth - get the total bandwidth of an aggregator 741 * @aggregator: the aggregator we're looking at 742 * 743 */ 744 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 745 { 746 u32 bandwidth=0; 747 u32 basic_speed; 748 749 if (aggregator->num_of_ports) { 750 basic_speed = __get_link_speed(aggregator->lag_ports); 751 switch (basic_speed) { 752 case AD_LINK_SPEED_BITMASK_1MBPS: 753 bandwidth = aggregator->num_of_ports; 754 break; 755 case AD_LINK_SPEED_BITMASK_10MBPS: 756 bandwidth = aggregator->num_of_ports * 10; 757 break; 758 case AD_LINK_SPEED_BITMASK_100MBPS: 759 bandwidth = aggregator->num_of_ports * 100; 760 break; 761 case AD_LINK_SPEED_BITMASK_1000MBPS: 762 bandwidth = aggregator->num_of_ports * 1000; 763 break; 764 case AD_LINK_SPEED_BITMASK_10000MBPS: 765 bandwidth = aggregator->num_of_ports * 10000; 766 break; 767 default: 768 bandwidth=0; // to silent the compilor .... 769 } 770 } 771 return bandwidth; 772 } 773 774 /** 775 * __get_active_agg - get the current active aggregator 776 * @aggregator: the aggregator we're looking at 777 * 778 */ 779 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 780 { 781 struct aggregator *retval = NULL; 782 783 for (; aggregator; aggregator = __get_next_agg(aggregator)) { 784 if (aggregator->is_active) { 785 retval = aggregator; 786 break; 787 } 788 } 789 790 return retval; 791 } 792 793 /** 794 * __update_lacpdu_from_port - update a port's lacpdu fields 795 * @port: the port we're looking at 796 * 797 */ 798 static inline void __update_lacpdu_from_port(struct port *port) 799 { 800 struct lacpdu *lacpdu = &port->lacpdu; 801 802 /* update current actual Actor parameters */ 803 /* lacpdu->subtype initialized 804 * lacpdu->version_number initialized 805 * lacpdu->tlv_type_actor_info initialized 806 * lacpdu->actor_information_length initialized 807 */ 808 809 lacpdu->actor_system_priority = htons(port->actor_system_priority); 810 lacpdu->actor_system = port->actor_system; 811 lacpdu->actor_key = htons(port->actor_oper_port_key); 812 lacpdu->actor_port_priority = htons(port->actor_port_priority); 813 lacpdu->actor_port = htons(port->actor_port_number); 814 lacpdu->actor_state = port->actor_oper_port_state; 815 816 /* lacpdu->reserved_3_1 initialized 817 * lacpdu->tlv_type_partner_info initialized 818 * lacpdu->partner_information_length initialized 819 */ 820 821 lacpdu->partner_system_priority = htons(port->partner_oper_system_priority); 822 lacpdu->partner_system = port->partner_oper_system; 823 lacpdu->partner_key = htons(port->partner_oper_key); 824 lacpdu->partner_port_priority = htons(port->partner_oper_port_priority); 825 lacpdu->partner_port = htons(port->partner_oper_port_number); 826 lacpdu->partner_state = port->partner_oper_port_state; 827 828 /* lacpdu->reserved_3_2 initialized 829 * lacpdu->tlv_type_collector_info initialized 830 * lacpdu->collector_information_length initialized 831 * collector_max_delay initialized 832 * reserved_12[12] initialized 833 * tlv_type_terminator initialized 834 * terminator_length initialized 835 * reserved_50[50] initialized 836 */ 837 } 838 839 ////////////////////////////////////////////////////////////////////////////////////// 840 // ================= main 802.3ad protocol code ====================================== 841 ////////////////////////////////////////////////////////////////////////////////////// 842 843 /** 844 * ad_lacpdu_send - send out a lacpdu packet on a given port 845 * @port: the port we're looking at 846 * 847 * Returns: 0 on success 848 * < 0 on error 849 */ 850 static int ad_lacpdu_send(struct port *port) 851 { 852 struct slave *slave = port->slave; 853 struct sk_buff *skb; 854 struct lacpdu_header *lacpdu_header; 855 int length = sizeof(struct lacpdu_header); 856 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR; 857 858 skb = dev_alloc_skb(length); 859 if (!skb) { 860 return -ENOMEM; 861 } 862 863 skb->dev = slave->dev; 864 skb_reset_mac_header(skb); 865 skb->network_header = skb->mac_header + ETH_HLEN; 866 skb->protocol = PKT_TYPE_LACPDU; 867 skb->priority = TC_PRIO_CONTROL; 868 869 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 870 871 lacpdu_header->ad_header.destination_address = lacpdu_multicast_address; 872 /* Note: source addres is set to be the member's PERMANENT address, because we use it 873 to identify loopback lacpdus in receive. */ 874 lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr)); 875 lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU; 876 877 lacpdu_header->lacpdu = port->lacpdu; // struct copy 878 879 dev_queue_xmit(skb); 880 881 return 0; 882 } 883 884 /** 885 * ad_marker_send - send marker information/response on a given port 886 * @port: the port we're looking at 887 * @marker: marker data to send 888 * 889 * Returns: 0 on success 890 * < 0 on error 891 */ 892 static int ad_marker_send(struct port *port, struct bond_marker *marker) 893 { 894 struct slave *slave = port->slave; 895 struct sk_buff *skb; 896 struct bond_marker_header *marker_header; 897 int length = sizeof(struct bond_marker_header); 898 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR; 899 900 skb = dev_alloc_skb(length + 16); 901 if (!skb) { 902 return -ENOMEM; 903 } 904 905 skb_reserve(skb, 16); 906 907 skb->dev = slave->dev; 908 skb_reset_mac_header(skb); 909 skb->network_header = skb->mac_header + ETH_HLEN; 910 skb->protocol = PKT_TYPE_LACPDU; 911 912 marker_header = (struct bond_marker_header *)skb_put(skb, length); 913 914 marker_header->ad_header.destination_address = lacpdu_multicast_address; 915 /* Note: source addres is set to be the member's PERMANENT address, because we use it 916 to identify loopback MARKERs in receive. */ 917 marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr)); 918 marker_header->ad_header.length_type = PKT_TYPE_LACPDU; 919 920 marker_header->marker = *marker; // struct copy 921 922 dev_queue_xmit(skb); 923 924 return 0; 925 } 926 927 /** 928 * ad_mux_machine - handle a port's mux state machine 929 * @port: the port we're looking at 930 * 931 */ 932 static void ad_mux_machine(struct port *port) 933 { 934 mux_states_t last_state; 935 936 // keep current State Machine state to compare later if it was changed 937 last_state = port->sm_mux_state; 938 939 if (port->sm_vars & AD_PORT_BEGIN) { 940 port->sm_mux_state = AD_MUX_DETACHED; // next state 941 } else { 942 switch (port->sm_mux_state) { 943 case AD_MUX_DETACHED: 944 if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY 945 port->sm_mux_state = AD_MUX_WAITING; // next state 946 } 947 break; 948 case AD_MUX_WAITING: 949 // if SELECTED == FALSE return to DETACH state 950 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED 951 port->sm_vars &= ~AD_PORT_READY_N; 952 // in order to withhold the Selection Logic to check all ports READY_N value 953 // every callback cycle to update ready variable, we check READY_N and update READY here 954 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 955 port->sm_mux_state = AD_MUX_DETACHED; // next state 956 break; 957 } 958 959 // check if the wait_while_timer expired 960 if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) { 961 port->sm_vars |= AD_PORT_READY_N; 962 } 963 964 // in order to withhold the selection logic to check all ports READY_N value 965 // every callback cycle to update ready variable, we check READY_N and update READY here 966 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 967 968 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state 969 if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) { 970 port->sm_mux_state = AD_MUX_ATTACHED; // next state 971 } 972 break; 973 case AD_MUX_ATTACHED: 974 // check also if agg_select_timer expired(so the edable port will take place only after this timer) 975 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { 976 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state 977 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY 978 port->sm_vars &= ~AD_PORT_READY_N; 979 // in order to withhold the selection logic to check all ports READY_N value 980 // every callback cycle to update ready variable, we check READY_N and update READY here 981 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 982 port->sm_mux_state = AD_MUX_DETACHED;// next state 983 } 984 break; 985 case AD_MUX_COLLECTING_DISTRIBUTING: 986 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || 987 !(port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) 988 ) { 989 port->sm_mux_state = AD_MUX_ATTACHED;// next state 990 991 } else { 992 // if port state hasn't changed make 993 // sure that a collecting distributing 994 // port in an active aggregator is enabled 995 if (port->aggregator && 996 port->aggregator->is_active && 997 !__port_is_enabled(port)) { 998 999 __enable_port(port); 1000 } 1001 } 1002 break; 1003 default: //to silence the compiler 1004 break; 1005 } 1006 } 1007 1008 // check if the state machine was changed 1009 if (port->sm_mux_state != last_state) { 1010 dprintk("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state); 1011 switch (port->sm_mux_state) { 1012 case AD_MUX_DETACHED: 1013 __detach_bond_from_agg(port); 1014 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1015 ad_disable_collecting_distributing(port); 1016 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1017 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1018 port->ntt = 1; 1019 break; 1020 case AD_MUX_WAITING: 1021 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1022 break; 1023 case AD_MUX_ATTACHED: 1024 __attach_bond_to_agg(port); 1025 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 1026 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1027 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1028 ad_disable_collecting_distributing(port); 1029 port->ntt = 1; 1030 break; 1031 case AD_MUX_COLLECTING_DISTRIBUTING: 1032 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1033 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1034 ad_enable_collecting_distributing(port); 1035 port->ntt = 1; 1036 break; 1037 default: //to silence the compiler 1038 break; 1039 } 1040 } 1041 } 1042 1043 /** 1044 * ad_rx_machine - handle a port's rx State Machine 1045 * @lacpdu: the lacpdu we've received 1046 * @port: the port we're looking at 1047 * 1048 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1049 * CURRENT. If timer expired set the state machine in the proper state. 1050 * In other cases, this function checks if we need to switch to other state. 1051 */ 1052 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1053 { 1054 rx_states_t last_state; 1055 1056 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback) 1057 __get_rx_machine_lock(port); 1058 1059 // keep current State Machine state to compare later if it was changed 1060 last_state = port->sm_rx_state; 1061 1062 // check if state machine should change state 1063 // first, check if port was reinitialized 1064 if (port->sm_vars & AD_PORT_BEGIN) { 1065 port->sm_rx_state = AD_RX_INITIALIZE; // next state 1066 } 1067 // check if port is not enabled 1068 else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) { 1069 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state 1070 } 1071 // check if new lacpdu arrived 1072 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { 1073 port->sm_rx_timer_counter = 0; // zero timer 1074 port->sm_rx_state = AD_RX_CURRENT; 1075 } else { 1076 // if timer is on, and if it is expired 1077 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { 1078 switch (port->sm_rx_state) { 1079 case AD_RX_EXPIRED: 1080 port->sm_rx_state = AD_RX_DEFAULTED; // next state 1081 break; 1082 case AD_RX_CURRENT: 1083 port->sm_rx_state = AD_RX_EXPIRED; // next state 1084 break; 1085 default: //to silence the compiler 1086 break; 1087 } 1088 } else { 1089 // if no lacpdu arrived and no timer is on 1090 switch (port->sm_rx_state) { 1091 case AD_RX_PORT_DISABLED: 1092 if (port->sm_vars & AD_PORT_MOVED) { 1093 port->sm_rx_state = AD_RX_INITIALIZE; // next state 1094 } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1095 port->sm_rx_state = AD_RX_EXPIRED; // next state 1096 } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) { 1097 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state 1098 } 1099 break; 1100 default: //to silence the compiler 1101 break; 1102 1103 } 1104 } 1105 } 1106 1107 // check if the State machine was changed or new lacpdu arrived 1108 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1109 dprintk("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state); 1110 switch (port->sm_rx_state) { 1111 case AD_RX_INITIALIZE: 1112 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { 1113 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1114 } else { 1115 port->sm_vars |= AD_PORT_LACP_ENABLED; 1116 } 1117 port->sm_vars &= ~AD_PORT_SELECTED; 1118 __record_default(port); 1119 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1120 port->sm_vars &= ~AD_PORT_MOVED; 1121 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state 1122 1123 /*- Fall Through -*/ 1124 1125 case AD_RX_PORT_DISABLED: 1126 port->sm_vars &= ~AD_PORT_MATCHED; 1127 break; 1128 case AD_RX_LACP_DISABLED: 1129 port->sm_vars &= ~AD_PORT_SELECTED; 1130 __record_default(port); 1131 port->partner_oper_port_state &= ~AD_STATE_AGGREGATION; 1132 port->sm_vars |= AD_PORT_MATCHED; 1133 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1134 break; 1135 case AD_RX_EXPIRED: 1136 //Reset of the Synchronization flag. (Standard 43.4.12) 1137 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the 1138 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. 1139 port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1140 port->sm_vars &= ~AD_PORT_MATCHED; 1141 port->partner_oper_port_state |= AD_SHORT_TIMEOUT; 1142 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1143 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1144 break; 1145 case AD_RX_DEFAULTED: 1146 __update_default_selected(port); 1147 __record_default(port); 1148 port->sm_vars |= AD_PORT_MATCHED; 1149 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1150 break; 1151 case AD_RX_CURRENT: 1152 // detect loopback situation 1153 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { 1154 // INFO_RECEIVED_LOOPBACK_FRAMES 1155 printk(KERN_ERR DRV_NAME ": %s: An illegal loopback occurred on " 1156 "adapter (%s). Check the configuration to verify that all " 1157 "Adapters are connected to 802.3ad compliant switch ports\n", 1158 port->slave->dev->master->name, port->slave->dev->name); 1159 __release_rx_machine_lock(port); 1160 return; 1161 } 1162 __update_selected(lacpdu, port); 1163 __update_ntt(lacpdu, port); 1164 __record_pdu(lacpdu, port); 1165 __choose_matched(lacpdu, port); 1166 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1167 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1168 // verify that if the aggregator is enabled, the port is enabled too. 1169 //(because if the link goes down for a short time, the 802.3ad will not 1170 // catch it, and the port will continue to be disabled) 1171 if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) { 1172 __enable_port(port); 1173 } 1174 break; 1175 default: //to silence the compiler 1176 break; 1177 } 1178 } 1179 __release_rx_machine_lock(port); 1180 } 1181 1182 /** 1183 * ad_tx_machine - handle a port's tx state machine 1184 * @port: the port we're looking at 1185 * 1186 */ 1187 static void ad_tx_machine(struct port *port) 1188 { 1189 // check if tx timer expired, to verify that we do not send more than 3 packets per second 1190 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1191 // check if there is something to send 1192 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1193 __update_lacpdu_from_port(port); 1194 // send the lacpdu 1195 if (ad_lacpdu_send(port) >= 0) { 1196 dprintk("Sent LACPDU on port %d\n", port->actor_port_number); 1197 // mark ntt as false, so it will not be sent again until demanded 1198 port->ntt = 0; 1199 } 1200 } 1201 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND 1202 port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1203 } 1204 } 1205 1206 /** 1207 * ad_periodic_machine - handle a port's periodic state machine 1208 * @port: the port we're looking at 1209 * 1210 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1211 */ 1212 static void ad_periodic_machine(struct port *port) 1213 { 1214 periodic_states_t last_state; 1215 1216 // keep current state machine state to compare later if it was changed 1217 last_state = port->sm_periodic_state; 1218 1219 // check if port was reinitialized 1220 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1221 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper_port_state & AD_STATE_LACP_ACTIVITY)) 1222 ) { 1223 port->sm_periodic_state = AD_NO_PERIODIC; // next state 1224 } 1225 // check if state machine should change state 1226 else if (port->sm_periodic_timer_counter) { 1227 // check if periodic state machine expired 1228 if (!(--port->sm_periodic_timer_counter)) { 1229 // if expired then do tx 1230 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1231 } else { 1232 // If not expired, check if there is some new timeout parameter from the partner state 1233 switch (port->sm_periodic_state) { 1234 case AD_FAST_PERIODIC: 1235 if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { 1236 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1237 } 1238 break; 1239 case AD_SLOW_PERIODIC: 1240 if ((port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { 1241 // stop current timer 1242 port->sm_periodic_timer_counter = 0; 1243 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1244 } 1245 break; 1246 default: //to silence the compiler 1247 break; 1248 } 1249 } 1250 } else { 1251 switch (port->sm_periodic_state) { 1252 case AD_NO_PERIODIC: 1253 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1254 break; 1255 case AD_PERIODIC_TX: 1256 if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { 1257 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1258 } else { 1259 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1260 } 1261 break; 1262 default: //to silence the compiler 1263 break; 1264 } 1265 } 1266 1267 // check if the state machine was changed 1268 if (port->sm_periodic_state != last_state) { 1269 dprintk("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state); 1270 switch (port->sm_periodic_state) { 1271 case AD_NO_PERIODIC: 1272 port->sm_periodic_timer_counter = 0; // zero timer 1273 break; 1274 case AD_FAST_PERIODIC: 1275 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 1276 break; 1277 case AD_SLOW_PERIODIC: 1278 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 1279 break; 1280 case AD_PERIODIC_TX: 1281 port->ntt = 1; 1282 break; 1283 default: //to silence the compiler 1284 break; 1285 } 1286 } 1287 } 1288 1289 /** 1290 * ad_port_selection_logic - select aggregation groups 1291 * @port: the port we're looking at 1292 * 1293 * Select aggregation groups, and assign each port for it's aggregetor. The 1294 * selection logic is called in the inititalization (after all the handshkes), 1295 * and after every lacpdu receive (if selected is off). 1296 */ 1297 static void ad_port_selection_logic(struct port *port) 1298 { 1299 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1300 struct port *last_port = NULL, *curr_port; 1301 int found = 0; 1302 1303 // if the port is already Selected, do nothing 1304 if (port->sm_vars & AD_PORT_SELECTED) { 1305 return; 1306 } 1307 1308 // if the port is connected to other aggregator, detach it 1309 if (port->aggregator) { 1310 // detach the port from its former aggregator 1311 temp_aggregator=port->aggregator; 1312 for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) { 1313 if (curr_port == port) { 1314 temp_aggregator->num_of_ports--; 1315 if (!last_port) {// if it is the first port attached to the aggregator 1316 temp_aggregator->lag_ports=port->next_port_in_aggregator; 1317 } else {// not the first port attached to the aggregator 1318 last_port->next_port_in_aggregator=port->next_port_in_aggregator; 1319 } 1320 1321 // clear the port's relations to this aggregator 1322 port->aggregator = NULL; 1323 port->next_port_in_aggregator=NULL; 1324 port->actor_port_aggregator_identifier=0; 1325 1326 dprintk("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier); 1327 // if the aggregator is empty, clear its parameters, and set it ready to be attached 1328 if (!temp_aggregator->lag_ports) { 1329 ad_clear_agg(temp_aggregator); 1330 } 1331 break; 1332 } 1333 } 1334 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list 1335 printk(KERN_WARNING DRV_NAME ": %s: Warning: Port %d (on %s) was " 1336 "related to aggregator %d but was not on its port list\n", 1337 port->slave->dev->master->name, 1338 port->actor_port_number, port->slave->dev->name, 1339 port->aggregator->aggregator_identifier); 1340 } 1341 } 1342 // search on all aggregators for a suitable aggregator for this port 1343 for (aggregator = __get_first_agg(port); aggregator; 1344 aggregator = __get_next_agg(aggregator)) { 1345 1346 // keep a free aggregator for later use(if needed) 1347 if (!aggregator->lag_ports) { 1348 if (!free_aggregator) { 1349 free_aggregator=aggregator; 1350 } 1351 continue; 1352 } 1353 // check if current aggregator suits us 1354 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND 1355 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper_system)) && 1356 (aggregator->partner_system_priority == port->partner_oper_system_priority) && 1357 (aggregator->partner_oper_aggregator_key == port->partner_oper_key) 1358 ) && 1359 ((MAC_ADDRESS_COMPARE(&(port->partner_oper_system), &(null_mac_addr)) && // partner answers 1360 !aggregator->is_individual) // but is not individual OR 1361 ) 1362 ) { 1363 // attach to the founded aggregator 1364 port->aggregator = aggregator; 1365 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; 1366 port->next_port_in_aggregator=aggregator->lag_ports; 1367 port->aggregator->num_of_ports++; 1368 aggregator->lag_ports=port; 1369 dprintk("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1370 1371 // mark this port as selected 1372 port->sm_vars |= AD_PORT_SELECTED; 1373 found = 1; 1374 break; 1375 } 1376 } 1377 1378 // the port couldn't find an aggregator - attach it to a new aggregator 1379 if (!found) { 1380 if (free_aggregator) { 1381 // assign port a new aggregator 1382 port->aggregator = free_aggregator; 1383 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; 1384 1385 // update the new aggregator's parameters 1386 // if port was responsed from the end-user 1387 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex 1388 port->aggregator->is_individual = 0; 1389 } else { 1390 port->aggregator->is_individual = 1; 1391 } 1392 1393 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; 1394 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; 1395 port->aggregator->partner_system=port->partner_oper_system; 1396 port->aggregator->partner_system_priority = port->partner_oper_system_priority; 1397 port->aggregator->partner_oper_aggregator_key = port->partner_oper_key; 1398 port->aggregator->receive_state = 1; 1399 port->aggregator->transmit_state = 1; 1400 port->aggregator->lag_ports = port; 1401 port->aggregator->num_of_ports++; 1402 1403 // mark this port as selected 1404 port->sm_vars |= AD_PORT_SELECTED; 1405 1406 dprintk("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1407 } else { 1408 printk(KERN_ERR DRV_NAME ": %s: Port %d (on %s) did not find a suitable aggregator\n", 1409 port->slave->dev->master->name, 1410 port->actor_port_number, port->slave->dev->name); 1411 } 1412 } 1413 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports 1414 // else set ready=FALSE in all aggregator's ports 1415 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1416 1417 if (!__check_agg_selection_timer(port) && (aggregator = __get_first_agg(port))) { 1418 ad_agg_selection_logic(aggregator); 1419 } 1420 } 1421 1422 /** 1423 * ad_agg_selection_logic - select an aggregation group for a team 1424 * @aggregator: the aggregator we're looking at 1425 * 1426 * It is assumed that only one aggregator may be selected for a team. 1427 * The logic of this function is to select (at first time) the aggregator with 1428 * the most ports attached to it, and to reselect the active aggregator only if 1429 * the previous aggregator has no more ports related to it. 1430 * 1431 * FIXME: this function MUST be called with the first agg in the bond, or 1432 * __get_active_agg() won't work correctly. This function should be better 1433 * called with the bond itself, and retrieve the first agg from it. 1434 */ 1435 static void ad_agg_selection_logic(struct aggregator *aggregator) 1436 { 1437 struct aggregator *best_aggregator = NULL, *active_aggregator = NULL; 1438 struct aggregator *last_active_aggregator = NULL, *origin_aggregator; 1439 struct port *port; 1440 u16 num_of_aggs=0; 1441 1442 origin_aggregator = aggregator; 1443 1444 //get current active aggregator 1445 last_active_aggregator = __get_active_agg(aggregator); 1446 1447 // search for the aggregator with the most ports attached to it. 1448 do { 1449 // count how many candidate lag's we have 1450 if (aggregator->lag_ports) { 1451 num_of_aggs++; 1452 } 1453 if (aggregator->is_active && !aggregator->is_individual && // if current aggregator is the active aggregator 1454 MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr))) { // and partner answers to 802.3ad PDUs 1455 if (aggregator->num_of_ports) { // if any ports attached to the current aggregator 1456 best_aggregator=NULL; // disregard the best aggregator that was chosen by now 1457 break; // stop the selection of other aggregator if there are any ports attached to this active aggregator 1458 } else { // no ports attached to this active aggregator 1459 aggregator->is_active = 0; // mark this aggregator as not active anymore 1460 } 1461 } 1462 if (aggregator->num_of_ports) { // if any ports attached 1463 if (best_aggregator) { // if there is a candidte aggregator 1464 //The reasons for choosing new best aggregator: 1465 // 1. if current agg is NOT individual and the best agg chosen so far is individual OR 1466 // current and best aggs are both individual or both not individual, AND 1467 // 2a. current agg partner reply but best agg partner do not reply OR 1468 // 2b. current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply AND 1469 // current has more ports/bandwidth, or same amount of ports but current has faster ports, THEN 1470 // current agg become best agg so far 1471 1472 //if current agg is NOT individual and the best agg chosen so far is individual change best_aggregator 1473 if (!aggregator->is_individual && best_aggregator->is_individual) { 1474 best_aggregator=aggregator; 1475 } 1476 // current and best aggs are both individual or both not individual 1477 else if ((aggregator->is_individual && best_aggregator->is_individual) || 1478 (!aggregator->is_individual && !best_aggregator->is_individual)) { 1479 // current and best aggs are both individual or both not individual AND 1480 // current agg partner reply but best agg partner do not reply 1481 if ((MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) && 1482 !MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) { 1483 best_aggregator=aggregator; 1484 } 1485 // current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply 1486 else if (! (!MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) && 1487 MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) { 1488 if ((__get_agg_selection_mode(aggregator->lag_ports) == AD_BANDWIDTH)&& 1489 (__get_agg_bandwidth(aggregator) > __get_agg_bandwidth(best_aggregator))) { 1490 best_aggregator=aggregator; 1491 } else if (__get_agg_selection_mode(aggregator->lag_ports) == AD_COUNT) { 1492 if (((aggregator->num_of_ports > best_aggregator->num_of_ports) && 1493 (aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS))|| 1494 ((aggregator->num_of_ports == best_aggregator->num_of_ports) && 1495 ((u16)(aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS) > 1496 (u16)(best_aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS)))) { 1497 best_aggregator=aggregator; 1498 } 1499 } 1500 } 1501 } 1502 } else { 1503 best_aggregator=aggregator; 1504 } 1505 } 1506 aggregator->is_active = 0; // mark all aggregators as not active anymore 1507 } while ((aggregator = __get_next_agg(aggregator))); 1508 1509 // if we have new aggregator selected, don't replace the old aggregator if it has an answering partner, 1510 // or if both old aggregator and new aggregator don't have answering partner 1511 if (best_aggregator) { 1512 if (last_active_aggregator && last_active_aggregator->lag_ports && last_active_aggregator->lag_ports->is_enabled && 1513 (MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) || // partner answers OR 1514 (!MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) && // both old and new 1515 !MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) // partner do not answer 1516 ) { 1517 // if new aggregator has link, and old aggregator does not, replace old aggregator.(do nothing) 1518 // -> don't replace otherwise. 1519 if (!(!last_active_aggregator->actor_oper_aggregator_key && best_aggregator->actor_oper_aggregator_key)) { 1520 best_aggregator=NULL; 1521 last_active_aggregator->is_active = 1; // don't replace good old aggregator 1522 1523 } 1524 } 1525 } 1526 1527 // if there is new best aggregator, activate it 1528 if (best_aggregator) { 1529 for (aggregator = __get_first_agg(best_aggregator->lag_ports); 1530 aggregator; 1531 aggregator = __get_next_agg(aggregator)) { 1532 1533 dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n", 1534 aggregator->aggregator_identifier, aggregator->num_of_ports, 1535 aggregator->actor_oper_aggregator_key, aggregator->partner_oper_aggregator_key, 1536 aggregator->is_individual, aggregator->is_active); 1537 } 1538 1539 // check if any partner replys 1540 if (best_aggregator->is_individual) { 1541 printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad response from " 1542 "the link partner for any adapters in the bond\n", 1543 best_aggregator->slave->dev->master->name); 1544 } 1545 1546 // check if there are more than one aggregator 1547 if (num_of_aggs > 1) { 1548 dprintk("Warning: More than one Link Aggregation Group was " 1549 "found in the bond. Only one group will function in the bond\n"); 1550 } 1551 1552 best_aggregator->is_active = 1; 1553 dprintk("LAG %d choosed as the active LAG\n", best_aggregator->aggregator_identifier); 1554 dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n", 1555 best_aggregator->aggregator_identifier, best_aggregator->num_of_ports, 1556 best_aggregator->actor_oper_aggregator_key, best_aggregator->partner_oper_aggregator_key, 1557 best_aggregator->is_individual, best_aggregator->is_active); 1558 1559 // disable the ports that were related to the former active_aggregator 1560 if (last_active_aggregator) { 1561 for (port=last_active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 1562 __disable_port(port); 1563 } 1564 } 1565 } 1566 1567 // if the selected aggregator is of join individuals(partner_system is NULL), enable their ports 1568 active_aggregator = __get_active_agg(origin_aggregator); 1569 1570 if (active_aggregator) { 1571 if (!MAC_ADDRESS_COMPARE(&(active_aggregator->partner_system), &(null_mac_addr))) { 1572 for (port=active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 1573 __enable_port(port); 1574 } 1575 } 1576 } 1577 } 1578 1579 /** 1580 * ad_clear_agg - clear a given aggregator's parameters 1581 * @aggregator: the aggregator we're looking at 1582 * 1583 */ 1584 static void ad_clear_agg(struct aggregator *aggregator) 1585 { 1586 if (aggregator) { 1587 aggregator->is_individual = 0; 1588 aggregator->actor_admin_aggregator_key = 0; 1589 aggregator->actor_oper_aggregator_key = 0; 1590 aggregator->partner_system = null_mac_addr; 1591 aggregator->partner_system_priority = 0; 1592 aggregator->partner_oper_aggregator_key = 0; 1593 aggregator->receive_state = 0; 1594 aggregator->transmit_state = 0; 1595 aggregator->lag_ports = NULL; 1596 aggregator->is_active = 0; 1597 aggregator->num_of_ports = 0; 1598 dprintk("LAG %d was cleared\n", aggregator->aggregator_identifier); 1599 } 1600 } 1601 1602 /** 1603 * ad_initialize_agg - initialize a given aggregator's parameters 1604 * @aggregator: the aggregator we're looking at 1605 * 1606 */ 1607 static void ad_initialize_agg(struct aggregator *aggregator) 1608 { 1609 if (aggregator) { 1610 ad_clear_agg(aggregator); 1611 1612 aggregator->aggregator_mac_address = null_mac_addr; 1613 aggregator->aggregator_identifier = 0; 1614 aggregator->slave = NULL; 1615 } 1616 } 1617 1618 /** 1619 * ad_initialize_port - initialize a given port's parameters 1620 * @aggregator: the aggregator we're looking at 1621 * @lacp_fast: boolean. whether fast periodic should be used 1622 * 1623 */ 1624 static void ad_initialize_port(struct port *port, int lacp_fast) 1625 { 1626 if (port) { 1627 port->actor_port_number = 1; 1628 port->actor_port_priority = 0xff; 1629 port->actor_system = null_mac_addr; 1630 port->actor_system_priority = 0xffff; 1631 port->actor_port_aggregator_identifier = 0; 1632 port->ntt = 0; 1633 port->actor_admin_port_key = 1; 1634 port->actor_oper_port_key = 1; 1635 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1636 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1637 1638 if (lacp_fast) { 1639 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1640 } 1641 1642 port->partner_admin_system = null_mac_addr; 1643 port->partner_oper_system = null_mac_addr; 1644 port->partner_admin_system_priority = 0xffff; 1645 port->partner_oper_system_priority = 0xffff; 1646 port->partner_admin_key = 1; 1647 port->partner_oper_key = 1; 1648 port->partner_admin_port_number = 1; 1649 port->partner_oper_port_number = 1; 1650 port->partner_admin_port_priority = 0xff; 1651 port->partner_oper_port_priority = 0xff; 1652 port->partner_admin_port_state = 1; 1653 port->partner_oper_port_state = 1; 1654 port->is_enabled = 1; 1655 // ****** private parameters ****** 1656 port->sm_vars = 0x3; 1657 port->sm_rx_state = 0; 1658 port->sm_rx_timer_counter = 0; 1659 port->sm_periodic_state = 0; 1660 port->sm_periodic_timer_counter = 0; 1661 port->sm_mux_state = 0; 1662 port->sm_mux_timer_counter = 0; 1663 port->sm_tx_state = 0; 1664 port->sm_tx_timer_counter = 0; 1665 port->slave = NULL; 1666 port->aggregator = NULL; 1667 port->next_port_in_aggregator = NULL; 1668 port->transaction_id = 0; 1669 1670 ad_initialize_lacpdu(&(port->lacpdu)); 1671 } 1672 } 1673 1674 /** 1675 * ad_enable_collecting_distributing - enable a port's transmit/receive 1676 * @port: the port we're looking at 1677 * 1678 * Enable @port if it's in an active aggregator 1679 */ 1680 static void ad_enable_collecting_distributing(struct port *port) 1681 { 1682 if (port->aggregator->is_active) { 1683 dprintk("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1684 __enable_port(port); 1685 } 1686 } 1687 1688 /** 1689 * ad_disable_collecting_distributing - disable a port's transmit/receive 1690 * @port: the port we're looking at 1691 * 1692 */ 1693 static void ad_disable_collecting_distributing(struct port *port) 1694 { 1695 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { 1696 dprintk("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1697 __disable_port(port); 1698 } 1699 } 1700 1701 #if 0 1702 /** 1703 * ad_marker_info_send - send a marker information frame 1704 * @port: the port we're looking at 1705 * 1706 * This function does nothing since we decided not to implement send and handle 1707 * response for marker PDU's, in this stage, but only to respond to marker 1708 * information. 1709 */ 1710 static void ad_marker_info_send(struct port *port) 1711 { 1712 struct bond_marker marker; 1713 u16 index; 1714 1715 // fill the marker PDU with the appropriate values 1716 marker.subtype = 0x02; 1717 marker.version_number = 0x01; 1718 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; 1719 marker.marker_length = 0x16; 1720 // convert requester_port to Big Endian 1721 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); 1722 marker.requester_system = port->actor_system; 1723 // convert requester_port(u32) to Big Endian 1724 marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24)); 1725 marker.pad = 0; 1726 marker.tlv_type_terminator = 0x00; 1727 marker.terminator_length = 0x00; 1728 for (index=0; index<90; index++) { 1729 marker.reserved_90[index]=0; 1730 } 1731 1732 // send the marker information 1733 if (ad_marker_send(port, &marker) >= 0) { 1734 dprintk("Sent Marker Information on port %d\n", port->actor_port_number); 1735 } 1736 } 1737 #endif 1738 1739 /** 1740 * ad_marker_info_received - handle receive of a Marker information frame 1741 * @marker_info: Marker info received 1742 * @port: the port we're looking at 1743 * 1744 */ 1745 static void ad_marker_info_received(struct bond_marker *marker_info, 1746 struct port *port) 1747 { 1748 struct bond_marker marker; 1749 1750 // copy the received marker data to the response marker 1751 //marker = *marker_info; 1752 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1753 // change the marker subtype to marker response 1754 marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE; 1755 // send the marker response 1756 1757 if (ad_marker_send(port, &marker) >= 0) { 1758 dprintk("Sent Marker Response on port %d\n", port->actor_port_number); 1759 } 1760 } 1761 1762 /** 1763 * ad_marker_response_received - handle receive of a marker response frame 1764 * @marker: marker PDU received 1765 * @port: the port we're looking at 1766 * 1767 * This function does nothing since we decided not to implement send and handle 1768 * response for marker PDU's, in this stage, but only to respond to marker 1769 * information. 1770 */ 1771 static void ad_marker_response_received(struct bond_marker *marker, 1772 struct port *port) 1773 { 1774 marker=NULL; // just to satisfy the compiler 1775 port=NULL; // just to satisfy the compiler 1776 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW 1777 } 1778 1779 /** 1780 * ad_initialize_lacpdu - initialize a given lacpdu structure 1781 * @lacpdu: lacpdu structure to initialize 1782 * 1783 */ 1784 static void ad_initialize_lacpdu(struct lacpdu *lacpdu) 1785 { 1786 u16 index; 1787 1788 // initialize lacpdu data 1789 lacpdu->subtype = 0x01; 1790 lacpdu->version_number = 0x01; 1791 lacpdu->tlv_type_actor_info = 0x01; 1792 lacpdu->actor_information_length = 0x14; 1793 // lacpdu->actor_system_priority updated on send 1794 // lacpdu->actor_system updated on send 1795 // lacpdu->actor_key updated on send 1796 // lacpdu->actor_port_priority updated on send 1797 // lacpdu->actor_port updated on send 1798 // lacpdu->actor_state updated on send 1799 lacpdu->tlv_type_partner_info = 0x02; 1800 lacpdu->partner_information_length = 0x14; 1801 for (index=0; index<=2; index++) { 1802 lacpdu->reserved_3_1[index]=0; 1803 } 1804 // lacpdu->partner_system_priority updated on send 1805 // lacpdu->partner_system updated on send 1806 // lacpdu->partner_key updated on send 1807 // lacpdu->partner_port_priority updated on send 1808 // lacpdu->partner_port updated on send 1809 // lacpdu->partner_state updated on send 1810 for (index=0; index<=2; index++) { 1811 lacpdu->reserved_3_2[index]=0; 1812 } 1813 lacpdu->tlv_type_collector_info = 0x03; 1814 lacpdu->collector_information_length= 0x10; 1815 lacpdu->collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY); 1816 for (index=0; index<=11; index++) { 1817 lacpdu->reserved_12[index]=0; 1818 } 1819 lacpdu->tlv_type_terminator = 0x00; 1820 lacpdu->terminator_length = 0; 1821 for (index=0; index<=49; index++) { 1822 lacpdu->reserved_50[index]=0; 1823 } 1824 } 1825 1826 ////////////////////////////////////////////////////////////////////////////////////// 1827 // ================= AD exported functions to the main bonding code ================== 1828 ////////////////////////////////////////////////////////////////////////////////////// 1829 1830 // Check aggregators status in team every T seconds 1831 #define AD_AGGREGATOR_SELECTION_TIMER 8 1832 1833 static u16 aggregator_identifier; 1834 1835 /** 1836 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1837 * @bond: bonding struct to work on 1838 * @tick_resolution: tick duration (millisecond resolution) 1839 * @lacp_fast: boolean. whether fast periodic should be used 1840 * 1841 * Can be called only after the mac address of the bond is set. 1842 */ 1843 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast) 1844 { 1845 // check that the bond is not initialized yet 1846 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) { 1847 1848 aggregator_identifier = 0; 1849 1850 BOND_AD_INFO(bond).lacp_fast = lacp_fast; 1851 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; 1852 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); 1853 1854 // initialize how many times this module is called in one second(should be about every 100ms) 1855 ad_ticks_per_sec = tick_resolution; 1856 1857 // initialize the aggregator selection timer(to activate an aggregation selection after initialize) 1858 BOND_AD_INFO(bond).agg_select_timer = (AD_AGGREGATOR_SELECTION_TIMER * ad_ticks_per_sec); 1859 BOND_AD_INFO(bond).agg_select_mode = AD_BANDWIDTH; 1860 } 1861 } 1862 1863 /** 1864 * bond_3ad_bind_slave - initialize a slave's port 1865 * @slave: slave struct to work on 1866 * 1867 * Returns: 0 on success 1868 * < 0 on error 1869 */ 1870 int bond_3ad_bind_slave(struct slave *slave) 1871 { 1872 struct bonding *bond = bond_get_bond_by_slave(slave); 1873 struct port *port; 1874 struct aggregator *aggregator; 1875 1876 if (bond == NULL) { 1877 printk(KERN_ERR DRV_NAME ": %s: The slave %s is not attached to its bond\n", 1878 slave->dev->master->name, slave->dev->name); 1879 return -1; 1880 } 1881 1882 //check that the slave has not been intialized yet. 1883 if (SLAVE_AD_INFO(slave).port.slave != slave) { 1884 1885 // port initialization 1886 port = &(SLAVE_AD_INFO(slave).port); 1887 1888 ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast); 1889 1890 port->slave = slave; 1891 port->actor_port_number = SLAVE_AD_INFO(slave).id; 1892 // key is determined according to the link speed, duplex and user key(which is yet not supported) 1893 // ------------------------------------------------------------ 1894 // Port key : | User key | Speed |Duplex| 1895 // ------------------------------------------------------------ 1896 // 16 6 1 0 1897 port->actor_admin_port_key = 0; // initialize this parameter 1898 port->actor_admin_port_key |= __get_duplex(port); 1899 port->actor_admin_port_key |= (__get_link_speed(port) << 1); 1900 port->actor_oper_port_key = port->actor_admin_port_key; 1901 // if the port is not full duplex, then the port should be not lacp Enabled 1902 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { 1903 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1904 } 1905 // actor system is the bond's system 1906 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 1907 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) 1908 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1909 port->aggregator = NULL; 1910 port->next_port_in_aggregator = NULL; 1911 1912 __disable_port(port); 1913 __initialize_port_locks(port); 1914 1915 1916 // aggregator initialization 1917 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1918 1919 ad_initialize_agg(aggregator); 1920 1921 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 1922 aggregator->aggregator_identifier = (++aggregator_identifier); 1923 aggregator->slave = slave; 1924 aggregator->is_active = 0; 1925 aggregator->num_of_ports = 0; 1926 } 1927 1928 return 0; 1929 } 1930 1931 /** 1932 * bond_3ad_unbind_slave - deinitialize a slave's port 1933 * @slave: slave struct to work on 1934 * 1935 * Search for the aggregator that is related to this port, remove the 1936 * aggregator and assign another aggregator for other port related to it 1937 * (if any), and remove the port. 1938 */ 1939 void bond_3ad_unbind_slave(struct slave *slave) 1940 { 1941 struct port *port, *prev_port, *temp_port; 1942 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 1943 int select_new_active_agg = 0; 1944 1945 // find the aggregator related to this slave 1946 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1947 1948 // find the port related to this slave 1949 port = &(SLAVE_AD_INFO(slave).port); 1950 1951 // if slave is null, the whole port is not initialized 1952 if (!port->slave) { 1953 printk(KERN_WARNING DRV_NAME ": Warning: %s: Trying to " 1954 "unbind an uninitialized port on %s\n", 1955 slave->dev->master->name, slave->dev->name); 1956 return; 1957 } 1958 1959 dprintk("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier); 1960 1961 /* Tell the partner that this port is not suitable for aggregation */ 1962 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 1963 __update_lacpdu_from_port(port); 1964 ad_lacpdu_send(port); 1965 1966 // check if this aggregator is occupied 1967 if (aggregator->lag_ports) { 1968 // check if there are other ports related to this aggregator except 1969 // the port related to this slave(thats ensure us that there is a 1970 // reason to search for new aggregator, and that we will find one 1971 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { 1972 // find new aggregator for the related port(s) 1973 new_aggregator = __get_first_agg(port); 1974 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) { 1975 // if the new aggregator is empty, or it connected to to our port only 1976 if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) { 1977 break; 1978 } 1979 } 1980 // if new aggregator found, copy the aggregator's parameters 1981 // and connect the related lag_ports to the new aggregator 1982 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 1983 dprintk("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier); 1984 1985 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { 1986 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", 1987 aggregator->slave->dev->master->name); 1988 // select new active aggregator 1989 select_new_active_agg = 1; 1990 } 1991 1992 new_aggregator->is_individual = aggregator->is_individual; 1993 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 1994 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 1995 new_aggregator->partner_system = aggregator->partner_system; 1996 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 1997 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 1998 new_aggregator->receive_state = aggregator->receive_state; 1999 new_aggregator->transmit_state = aggregator->transmit_state; 2000 new_aggregator->lag_ports = aggregator->lag_ports; 2001 new_aggregator->is_active = aggregator->is_active; 2002 new_aggregator->num_of_ports = aggregator->num_of_ports; 2003 2004 // update the information that is written on the ports about the aggregator 2005 for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) { 2006 temp_port->aggregator=new_aggregator; 2007 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2008 } 2009 2010 // clear the aggregator 2011 ad_clear_agg(aggregator); 2012 2013 if (select_new_active_agg) { 2014 ad_agg_selection_logic(__get_first_agg(port)); 2015 } 2016 } else { 2017 printk(KERN_WARNING DRV_NAME ": %s: Warning: unbinding aggregator, " 2018 "and could not find a new aggregator for its ports\n", 2019 slave->dev->master->name); 2020 } 2021 } else { // in case that the only port related to this aggregator is the one we want to remove 2022 select_new_active_agg = aggregator->is_active; 2023 // clear the aggregator 2024 ad_clear_agg(aggregator); 2025 if (select_new_active_agg) { 2026 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", 2027 slave->dev->master->name); 2028 // select new active aggregator 2029 ad_agg_selection_logic(__get_first_agg(port)); 2030 } 2031 } 2032 } 2033 2034 dprintk("Unbinding port %d\n", port->actor_port_number); 2035 // find the aggregator that this port is connected to 2036 temp_aggregator = __get_first_agg(port); 2037 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) { 2038 prev_port = NULL; 2039 // search the port in the aggregator's related ports 2040 for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) { 2041 if (temp_port == port) { // the aggregator found - detach the port from this aggregator 2042 if (prev_port) { 2043 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2044 } else { 2045 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2046 } 2047 temp_aggregator->num_of_ports--; 2048 if (temp_aggregator->num_of_ports==0) { 2049 select_new_active_agg = temp_aggregator->is_active; 2050 // clear the aggregator 2051 ad_clear_agg(temp_aggregator); 2052 if (select_new_active_agg) { 2053 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", 2054 slave->dev->master->name); 2055 // select new active aggregator 2056 ad_agg_selection_logic(__get_first_agg(port)); 2057 } 2058 } 2059 break; 2060 } 2061 } 2062 } 2063 port->slave=NULL; 2064 } 2065 2066 /** 2067 * bond_3ad_state_machine_handler - handle state machines timeout 2068 * @bond: bonding struct to work on 2069 * 2070 * The state machine handling concept in this module is to check every tick 2071 * which state machine should operate any function. The execution order is 2072 * round robin, so when we have an interaction between state machines, the 2073 * reply of one to each other might be delayed until next tick. 2074 * 2075 * This function also complete the initialization when the agg_select_timer 2076 * times out, and it selects an aggregator for the ports that are yet not 2077 * related to any aggregator, and selects the active aggregator for a bond. 2078 */ 2079 void bond_3ad_state_machine_handler(struct work_struct *work) 2080 { 2081 struct bonding *bond = container_of(work, struct bonding, 2082 ad_work.work); 2083 struct port *port; 2084 struct aggregator *aggregator; 2085 2086 read_lock(&bond->lock); 2087 2088 if (bond->kill_timers) { 2089 goto out; 2090 } 2091 2092 //check if there are any slaves 2093 if (bond->slave_cnt == 0) { 2094 goto re_arm; 2095 } 2096 2097 // check if agg_select_timer timer after initialize is timed out 2098 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { 2099 // select the active aggregator for the bond 2100 if ((port = __get_first_port(bond))) { 2101 if (!port->slave) { 2102 printk(KERN_WARNING DRV_NAME ": %s: Warning: bond's first port is " 2103 "uninitialized\n", bond->dev->name); 2104 goto re_arm; 2105 } 2106 2107 aggregator = __get_first_agg(port); 2108 ad_agg_selection_logic(aggregator); 2109 } 2110 } 2111 2112 // for each port run the state machines 2113 for (port = __get_first_port(bond); port; port = __get_next_port(port)) { 2114 if (!port->slave) { 2115 printk(KERN_WARNING DRV_NAME ": %s: Warning: Found an uninitialized " 2116 "port\n", bond->dev->name); 2117 goto re_arm; 2118 } 2119 2120 ad_rx_machine(NULL, port); 2121 ad_periodic_machine(port); 2122 ad_port_selection_logic(port); 2123 ad_mux_machine(port); 2124 ad_tx_machine(port); 2125 2126 // turn off the BEGIN bit, since we already handled it 2127 if (port->sm_vars & AD_PORT_BEGIN) { 2128 port->sm_vars &= ~AD_PORT_BEGIN; 2129 } 2130 } 2131 2132 re_arm: 2133 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2134 out: 2135 read_unlock(&bond->lock); 2136 } 2137 2138 /** 2139 * bond_3ad_rx_indication - handle a received frame 2140 * @lacpdu: received lacpdu 2141 * @slave: slave struct to work on 2142 * @length: length of the data received 2143 * 2144 * It is assumed that frames that were sent on this NIC don't returned as new 2145 * received frames (loopback). Since only the payload is given to this 2146 * function, it check for loopback. 2147 */ 2148 static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) 2149 { 2150 struct port *port; 2151 2152 if (length >= sizeof(struct lacpdu)) { 2153 2154 port = &(SLAVE_AD_INFO(slave).port); 2155 2156 if (!port->slave) { 2157 printk(KERN_WARNING DRV_NAME ": %s: Warning: port of slave %s is " 2158 "uninitialized\n", slave->dev->name, slave->dev->master->name); 2159 return; 2160 } 2161 2162 switch (lacpdu->subtype) { 2163 case AD_TYPE_LACPDU: 2164 dprintk("Received LACPDU on port %d\n", port->actor_port_number); 2165 ad_rx_machine(lacpdu, port); 2166 break; 2167 2168 case AD_TYPE_MARKER: 2169 // No need to convert fields to Little Endian since we don't use the marker's fields. 2170 2171 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2172 case AD_MARKER_INFORMATION_SUBTYPE: 2173 dprintk("Received Marker Information on port %d\n", port->actor_port_number); 2174 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2175 break; 2176 2177 case AD_MARKER_RESPONSE_SUBTYPE: 2178 dprintk("Received Marker Response on port %d\n", port->actor_port_number); 2179 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2180 break; 2181 2182 default: 2183 dprintk("Received an unknown Marker subtype on slot %d\n", port->actor_port_number); 2184 } 2185 } 2186 } 2187 } 2188 2189 /** 2190 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication 2191 * @slave: slave struct to work on 2192 * 2193 * Handle reselection of aggregator (if needed) for this port. 2194 */ 2195 void bond_3ad_adapter_speed_changed(struct slave *slave) 2196 { 2197 struct port *port; 2198 2199 port = &(SLAVE_AD_INFO(slave).port); 2200 2201 // if slave is null, the whole port is not initialized 2202 if (!port->slave) { 2203 printk(KERN_WARNING DRV_NAME ": Warning: %s: speed " 2204 "changed for uninitialized port on %s\n", 2205 slave->dev->master->name, slave->dev->name); 2206 return; 2207 } 2208 2209 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2210 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); 2211 dprintk("Port %d changed speed\n", port->actor_port_number); 2212 // there is no need to reselect a new aggregator, just signal the 2213 // state machines to reinitialize 2214 port->sm_vars |= AD_PORT_BEGIN; 2215 } 2216 2217 /** 2218 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication 2219 * @slave: slave struct to work on 2220 * 2221 * Handle reselection of aggregator (if needed) for this port. 2222 */ 2223 void bond_3ad_adapter_duplex_changed(struct slave *slave) 2224 { 2225 struct port *port; 2226 2227 port=&(SLAVE_AD_INFO(slave).port); 2228 2229 // if slave is null, the whole port is not initialized 2230 if (!port->slave) { 2231 printk(KERN_WARNING DRV_NAME ": %s: Warning: duplex changed " 2232 "for uninitialized port on %s\n", 2233 slave->dev->master->name, slave->dev->name); 2234 return; 2235 } 2236 2237 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2238 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); 2239 dprintk("Port %d changed duplex\n", port->actor_port_number); 2240 // there is no need to reselect a new aggregator, just signal the 2241 // state machines to reinitialize 2242 port->sm_vars |= AD_PORT_BEGIN; 2243 } 2244 2245 /** 2246 * bond_3ad_handle_link_change - handle a slave's link status change indication 2247 * @slave: slave struct to work on 2248 * @status: whether the link is now up or down 2249 * 2250 * Handle reselection of aggregator (if needed) for this port. 2251 */ 2252 void bond_3ad_handle_link_change(struct slave *slave, char link) 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: %s: link status changed for " 2261 "uninitialized port on %s\n", 2262 slave->dev->master->name, slave->dev->name); 2263 return; 2264 } 2265 2266 // 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) 2267 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report 2268 if (link == BOND_LINK_UP) { 2269 port->is_enabled = 1; 2270 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2271 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); 2272 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2273 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); 2274 } else { 2275 /* link has failed */ 2276 port->is_enabled = 0; 2277 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2278 port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS); 2279 } 2280 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); 2281 // there is no need to reselect a new aggregator, just signal the 2282 // state machines to reinitialize 2283 port->sm_vars |= AD_PORT_BEGIN; 2284 } 2285 2286 /* 2287 * set link state for bonding master: if we have an active 2288 * aggregator, we're up, if not, we're down. Presumes that we cannot 2289 * have an active aggregator if there are no slaves with link up. 2290 * 2291 * This behavior complies with IEEE 802.3 section 43.3.9. 2292 * 2293 * Called by bond_set_carrier(). Return zero if carrier state does not 2294 * change, nonzero if it does. 2295 */ 2296 int bond_3ad_set_carrier(struct bonding *bond) 2297 { 2298 if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) { 2299 if (!netif_carrier_ok(bond->dev)) { 2300 netif_carrier_on(bond->dev); 2301 return 1; 2302 } 2303 return 0; 2304 } 2305 2306 if (netif_carrier_ok(bond->dev)) { 2307 netif_carrier_off(bond->dev); 2308 return 1; 2309 } 2310 return 0; 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 DRV_NAME ": %s: Error: " 2367 "bond_3ad_get_active_agg_info failed\n", dev->name); 2368 goto out; 2369 } 2370 2371 slaves_in_agg = ad_info.ports; 2372 agg_id = ad_info.aggregator_id; 2373 2374 if (slaves_in_agg == 0) { 2375 /*the aggregator is empty*/ 2376 printk(KERN_DEBUG DRV_NAME ": %s: Error: active " 2377 "aggregator is empty\n", 2378 dev->name); 2379 goto out; 2380 } 2381 2382 slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg); 2383 2384 bond_for_each_slave(bond, slave, i) { 2385 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; 2386 2387 if (agg && (agg->aggregator_identifier == agg_id)) { 2388 slave_agg_no--; 2389 if (slave_agg_no < 0) { 2390 break; 2391 } 2392 } 2393 } 2394 2395 if (slave_agg_no >= 0) { 2396 printk(KERN_ERR DRV_NAME ": %s: Error: Couldn't find a slave to tx on " 2397 "for aggregator ID %d\n", dev->name, agg_id); 2398 goto out; 2399 } 2400 2401 start_at = slave; 2402 2403 bond_for_each_slave_from(bond, slave, i, start_at) { 2404 int slave_agg_id = 0; 2405 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; 2406 2407 if (agg) { 2408 slave_agg_id = agg->aggregator_identifier; 2409 } 2410 2411 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) { 2412 res = bond_dev_queue_xmit(bond, skb, slave->dev); 2413 break; 2414 } 2415 } 2416 2417 out: 2418 if (res) { 2419 /* no suitable interface, frame not sent */ 2420 dev_kfree_skb(skb); 2421 } 2422 read_unlock(&bond->lock); 2423 return 0; 2424 } 2425 2426 int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev) 2427 { 2428 struct bonding *bond = dev->priv; 2429 struct slave *slave = NULL; 2430 int ret = NET_RX_DROP; 2431 2432 if (dev_net(dev) != &init_net) 2433 goto out; 2434 2435 if (!(dev->flags & IFF_MASTER)) 2436 goto out; 2437 2438 read_lock(&bond->lock); 2439 slave = bond_get_slave_by_dev((struct bonding *)dev->priv, orig_dev); 2440 if (!slave) 2441 goto out_unlock; 2442 2443 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len); 2444 2445 ret = NET_RX_SUCCESS; 2446 2447 out_unlock: 2448 read_unlock(&bond->lock); 2449 out: 2450 dev_kfree_skb(skb); 2451 2452 return ret; 2453 } 2454 2455