1 /* 2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License as published by the Free 6 * Software Foundation; either version 2 of the License, or (at your option) 7 * any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 59 16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 * 18 * The full GNU General Public License is included in this distribution in the 19 * file called LICENSE. 20 * 21 */ 22 23 #include <linux/skbuff.h> 24 #include <linux/if_ether.h> 25 #include <linux/netdevice.h> 26 #include <linux/spinlock.h> 27 #include <linux/ethtool.h> 28 #include <linux/etherdevice.h> 29 #include <linux/if_bonding.h> 30 #include <linux/pkt_sched.h> 31 #include <net/net_namespace.h> 32 #include "bonding.h" 33 #include "bond_3ad.h" 34 35 // General definitions 36 #define AD_SHORT_TIMEOUT 1 37 #define AD_LONG_TIMEOUT 0 38 #define AD_STANDBY 0x2 39 #define AD_MAX_TX_IN_SECOND 3 40 #define AD_COLLECTOR_MAX_DELAY 0 41 42 // Timer definitions(43.4.4 in the 802.3ad standard) 43 #define AD_FAST_PERIODIC_TIME 1 44 #define AD_SLOW_PERIODIC_TIME 30 45 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) 46 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) 47 #define AD_CHURN_DETECTION_TIME 60 48 #define AD_AGGREGATE_WAIT_TIME 2 49 50 // Port state definitions(43.4.2.2 in the 802.3ad standard) 51 #define AD_STATE_LACP_ACTIVITY 0x1 52 #define AD_STATE_LACP_TIMEOUT 0x2 53 #define AD_STATE_AGGREGATION 0x4 54 #define AD_STATE_SYNCHRONIZATION 0x8 55 #define AD_STATE_COLLECTING 0x10 56 #define AD_STATE_DISTRIBUTING 0x20 57 #define AD_STATE_DEFAULTED 0x40 58 #define AD_STATE_EXPIRED 0x80 59 60 // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard) 61 #define AD_PORT_BEGIN 0x1 62 #define AD_PORT_LACP_ENABLED 0x2 63 #define AD_PORT_ACTOR_CHURN 0x4 64 #define AD_PORT_PARTNER_CHURN 0x8 65 #define AD_PORT_READY 0x10 66 #define AD_PORT_READY_N 0x20 67 #define AD_PORT_MATCHED 0x40 68 #define AD_PORT_STANDBY 0x80 69 #define AD_PORT_SELECTED 0x100 70 #define AD_PORT_MOVED 0x200 71 72 // Port Key definitions 73 // key is determined according to the link speed, duplex and 74 // user key(which is yet not supported) 75 // ------------------------------------------------------------ 76 // Port key : | User key | Speed |Duplex| 77 // ------------------------------------------------------------ 78 // 16 6 1 0 79 #define AD_DUPLEX_KEY_BITS 0x1 80 #define AD_SPEED_KEY_BITS 0x3E 81 #define AD_USER_KEY_BITS 0xFFC0 82 83 //dalloun 84 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 85 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 86 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 87 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 88 #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 89 //endalloun 90 91 // compare MAC addresses 92 #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN) 93 94 static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}}; 95 static u16 ad_ticks_per_sec; 96 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 97 98 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; 99 100 // ================= main 802.3ad protocol functions ================== 101 static int ad_lacpdu_send(struct port *port); 102 static int ad_marker_send(struct port *port, struct bond_marker *marker); 103 static void ad_mux_machine(struct port *port); 104 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 105 static void ad_tx_machine(struct port *port); 106 static void ad_periodic_machine(struct port *port); 107 static void ad_port_selection_logic(struct port *port); 108 static void ad_agg_selection_logic(struct aggregator *aggregator); 109 static void ad_clear_agg(struct aggregator *aggregator); 110 static void ad_initialize_agg(struct aggregator *aggregator); 111 static void ad_initialize_port(struct port *port, int lacp_fast); 112 static void ad_enable_collecting_distributing(struct port *port); 113 static void ad_disable_collecting_distributing(struct port *port); 114 static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port); 115 static void ad_marker_response_received(struct bond_marker *marker, struct port *port); 116 117 118 ///////////////////////////////////////////////////////////////////////////////// 119 // ================= api to bonding and kernel code ================== 120 ///////////////////////////////////////////////////////////////////////////////// 121 122 /** 123 * __get_bond_by_port - get the port's bonding struct 124 * @port: the port we're looking at 125 * 126 * Return @port's bonding struct, or %NULL if it can't be found. 127 */ 128 static inline struct bonding *__get_bond_by_port(struct port *port) 129 { 130 if (port->slave == NULL) { 131 return NULL; 132 } 133 134 return bond_get_bond_by_slave(port->slave); 135 } 136 137 /** 138 * __get_first_port - get the first port in the bond 139 * @bond: the bond we're looking at 140 * 141 * Return the port of the first slave in @bond, or %NULL if it can't be found. 142 */ 143 static inline struct port *__get_first_port(struct bonding *bond) 144 { 145 if (bond->slave_cnt == 0) { 146 return NULL; 147 } 148 149 return &(SLAVE_AD_INFO(bond->first_slave).port); 150 } 151 152 /** 153 * __get_next_port - get the next port in the bond 154 * @port: the port we're looking at 155 * 156 * Return the port of the slave that is next in line of @port's slave in the 157 * bond, or %NULL if it can't be found. 158 */ 159 static inline struct port *__get_next_port(struct port *port) 160 { 161 struct bonding *bond = __get_bond_by_port(port); 162 struct slave *slave = port->slave; 163 164 // If there's no bond for this port, or this is the last slave 165 if ((bond == NULL) || (slave->next == bond->first_slave)) { 166 return NULL; 167 } 168 169 return &(SLAVE_AD_INFO(slave->next).port); 170 } 171 172 /** 173 * __get_first_agg - get the first aggregator in the bond 174 * @bond: the bond we're looking at 175 * 176 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 177 * found. 178 */ 179 static inline struct aggregator *__get_first_agg(struct port *port) 180 { 181 struct bonding *bond = __get_bond_by_port(port); 182 183 // If there's no bond for this port, or bond has no slaves 184 if ((bond == NULL) || (bond->slave_cnt == 0)) { 185 return NULL; 186 } 187 188 return &(SLAVE_AD_INFO(bond->first_slave).aggregator); 189 } 190 191 /** 192 * __get_next_agg - get the next aggregator in the bond 193 * @aggregator: the aggregator we're looking at 194 * 195 * Return the aggregator of the slave that is next in line of @aggregator's 196 * slave in the bond, or %NULL if it can't be found. 197 */ 198 static inline struct aggregator *__get_next_agg(struct aggregator *aggregator) 199 { 200 struct slave *slave = aggregator->slave; 201 struct bonding *bond = bond_get_bond_by_slave(slave); 202 203 // If there's no bond for this aggregator, or this is the last slave 204 if ((bond == NULL) || (slave->next == bond->first_slave)) { 205 return NULL; 206 } 207 208 return &(SLAVE_AD_INFO(slave->next).aggregator); 209 } 210 211 /* 212 * __agg_has_partner 213 * 214 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 215 * address for the partner). Return 0 if not. 216 */ 217 static inline int __agg_has_partner(struct aggregator *agg) 218 { 219 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 220 } 221 222 /** 223 * __disable_port - disable the port's slave 224 * @port: the port we're looking at 225 * 226 */ 227 static inline void __disable_port(struct port *port) 228 { 229 bond_set_slave_inactive_flags(port->slave); 230 } 231 232 /** 233 * __enable_port - enable the port's slave, if it's up 234 * @port: the port we're looking at 235 * 236 */ 237 static inline void __enable_port(struct port *port) 238 { 239 struct slave *slave = port->slave; 240 241 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) { 242 bond_set_slave_active_flags(slave); 243 } 244 } 245 246 /** 247 * __port_is_enabled - check if the port's slave is in active state 248 * @port: the port we're looking at 249 * 250 */ 251 static inline int __port_is_enabled(struct port *port) 252 { 253 return(port->slave->state == BOND_STATE_ACTIVE); 254 } 255 256 /** 257 * __get_agg_selection_mode - get the aggregator selection mode 258 * @port: the port we're looking at 259 * 260 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 261 */ 262 static inline u32 __get_agg_selection_mode(struct port *port) 263 { 264 struct bonding *bond = __get_bond_by_port(port); 265 266 if (bond == NULL) { 267 return BOND_AD_STABLE; 268 } 269 270 return BOND_AD_INFO(bond).agg_select_mode; 271 } 272 273 /** 274 * __check_agg_selection_timer - check if the selection timer has expired 275 * @port: the port we're looking at 276 * 277 */ 278 static inline int __check_agg_selection_timer(struct port *port) 279 { 280 struct bonding *bond = __get_bond_by_port(port); 281 282 if (bond == NULL) { 283 return 0; 284 } 285 286 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 287 } 288 289 /** 290 * __get_rx_machine_lock - lock the port's RX machine 291 * @port: the port we're looking at 292 * 293 */ 294 static inline void __get_rx_machine_lock(struct port *port) 295 { 296 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 297 } 298 299 /** 300 * __release_rx_machine_lock - unlock the port's RX machine 301 * @port: the port we're looking at 302 * 303 */ 304 static inline void __release_rx_machine_lock(struct port *port) 305 { 306 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 307 } 308 309 /** 310 * __get_link_speed - get a port's speed 311 * @port: the port we're looking at 312 * 313 * Return @port's speed in 802.3ad bitmask format. i.e. one of: 314 * 0, 315 * %AD_LINK_SPEED_BITMASK_10MBPS, 316 * %AD_LINK_SPEED_BITMASK_100MBPS, 317 * %AD_LINK_SPEED_BITMASK_1000MBPS, 318 * %AD_LINK_SPEED_BITMASK_10000MBPS 319 */ 320 static u16 __get_link_speed(struct port *port) 321 { 322 struct slave *slave = port->slave; 323 u16 speed; 324 325 /* this if covers only a special case: when the configuration starts with 326 * link down, it sets the speed to 0. 327 * This is done in spite of the fact that the e100 driver reports 0 to be 328 * compatible with MVT in the future.*/ 329 if (slave->link != BOND_LINK_UP) { 330 speed=0; 331 } else { 332 switch (slave->speed) { 333 case SPEED_10: 334 speed = AD_LINK_SPEED_BITMASK_10MBPS; 335 break; 336 337 case SPEED_100: 338 speed = AD_LINK_SPEED_BITMASK_100MBPS; 339 break; 340 341 case SPEED_1000: 342 speed = AD_LINK_SPEED_BITMASK_1000MBPS; 343 break; 344 345 case SPEED_10000: 346 speed = AD_LINK_SPEED_BITMASK_10000MBPS; 347 break; 348 349 default: 350 speed = 0; // unknown speed value from ethtool. shouldn't happen 351 break; 352 } 353 } 354 355 pr_debug("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed); 356 return speed; 357 } 358 359 /** 360 * __get_duplex - get a port's duplex 361 * @port: the port we're looking at 362 * 363 * Return @port's duplex in 802.3ad bitmask format. i.e.: 364 * 0x01 if in full duplex 365 * 0x00 otherwise 366 */ 367 static u8 __get_duplex(struct port *port) 368 { 369 struct slave *slave = port->slave; 370 371 u8 retval; 372 373 // handling a special case: when the configuration starts with 374 // link down, it sets the duplex to 0. 375 if (slave->link != BOND_LINK_UP) { 376 retval=0x0; 377 } else { 378 switch (slave->duplex) { 379 case DUPLEX_FULL: 380 retval=0x1; 381 pr_debug("Port %d Received status full duplex update from adapter\n", port->actor_port_number); 382 break; 383 case DUPLEX_HALF: 384 default: 385 retval=0x0; 386 pr_debug("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number); 387 break; 388 } 389 } 390 return retval; 391 } 392 393 /** 394 * __initialize_port_locks - initialize a port's RX machine spinlock 395 * @port: the port we're looking at 396 * 397 */ 398 static inline void __initialize_port_locks(struct port *port) 399 { 400 // make sure it isn't called twice 401 spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 402 } 403 404 //conversions 405 406 /** 407 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 408 * @timer_type: which timer to operate 409 * @par: timer parameter. see below 410 * 411 * If @timer_type is %current_while_timer, @par indicates long/short timer. 412 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 413 * %SLOW_PERIODIC_TIME. 414 */ 415 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 416 { 417 u16 retval=0; //to silence the compiler 418 419 switch (timer_type) { 420 case AD_CURRENT_WHILE_TIMER: // for rx machine usage 421 if (par) { // for short or long timeout 422 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout 423 } else { 424 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout 425 } 426 break; 427 case AD_ACTOR_CHURN_TIMER: // for local churn machine 428 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 429 break; 430 case AD_PERIODIC_TIMER: // for periodic machine 431 retval = (par*ad_ticks_per_sec); // long timeout 432 break; 433 case AD_PARTNER_CHURN_TIMER: // for remote churn machine 434 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 435 break; 436 case AD_WAIT_WHILE_TIMER: // for selection machine 437 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 438 break; 439 } 440 return retval; 441 } 442 443 444 ///////////////////////////////////////////////////////////////////////////////// 445 // ================= ad_rx_machine helper functions ================== 446 ///////////////////////////////////////////////////////////////////////////////// 447 448 /** 449 * __record_pdu - record parameters from a received lacpdu 450 * @lacpdu: the lacpdu we've received 451 * @port: the port we're looking at 452 * 453 * Record the parameter values for the Actor carried in a received lacpdu as 454 * the current partner operational parameter values and sets 455 * actor_oper_port_state.defaulted to FALSE. 456 */ 457 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 458 { 459 if (lacpdu && port) { 460 struct port_params *partner = &port->partner_oper; 461 462 // record the new parameter values for the partner operational 463 partner->port_number = ntohs(lacpdu->actor_port); 464 partner->port_priority = ntohs(lacpdu->actor_port_priority); 465 partner->system = lacpdu->actor_system; 466 partner->system_priority = ntohs(lacpdu->actor_system_priority); 467 partner->key = ntohs(lacpdu->actor_key); 468 partner->port_state = lacpdu->actor_state; 469 470 // set actor_oper_port_state.defaulted to FALSE 471 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 472 473 // set the partner sync. to on if the partner is sync. and the port is matched 474 if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 475 partner->port_state |= AD_STATE_SYNCHRONIZATION; 476 } else { 477 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 478 } 479 } 480 } 481 482 /** 483 * __record_default - record default parameters 484 * @port: the port we're looking at 485 * 486 * This function records the default parameter values for the partner carried 487 * in the Partner Admin parameters as the current partner operational parameter 488 * values and sets actor_oper_port_state.defaulted to TRUE. 489 */ 490 static void __record_default(struct port *port) 491 { 492 if (port) { 493 // record the partner admin parameters 494 memcpy(&port->partner_oper, &port->partner_admin, 495 sizeof(struct port_params)); 496 497 // set actor_oper_port_state.defaulted to true 498 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 499 } 500 } 501 502 /** 503 * __update_selected - update a port's Selected variable from a received lacpdu 504 * @lacpdu: the lacpdu we've received 505 * @port: the port we're looking at 506 * 507 * Update the value of the selected variable, using parameter values from a 508 * newly received lacpdu. The parameter values for the Actor carried in the 509 * received PDU are compared with the corresponding operational parameter 510 * values for the ports partner. If one or more of the comparisons shows that 511 * the value(s) received in the PDU differ from the current operational values, 512 * then selected is set to FALSE and actor_oper_port_state.synchronization is 513 * set to out_of_sync. Otherwise, selected remains unchanged. 514 */ 515 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 516 { 517 if (lacpdu && port) { 518 const struct port_params *partner = &port->partner_oper; 519 520 // check if any parameter is different 521 if (ntohs(lacpdu->actor_port) != partner->port_number 522 || ntohs(lacpdu->actor_port_priority) != partner->port_priority 523 || MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) 524 || ntohs(lacpdu->actor_system_priority) != partner->system_priority 525 || ntohs(lacpdu->actor_key) != partner->key 526 || (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 527 // update the state machine Selected variable 528 port->sm_vars &= ~AD_PORT_SELECTED; 529 } 530 } 531 } 532 533 /** 534 * __update_default_selected - update a port's Selected variable from Partner 535 * @port: the port we're looking at 536 * 537 * This function updates the value of the selected variable, using the partner 538 * administrative parameter values. The administrative values are compared with 539 * the corresponding operational parameter values for the partner. If one or 540 * more of the comparisons shows that the administrative value(s) differ from 541 * the current operational values, then Selected is set to FALSE and 542 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 543 * Selected remains unchanged. 544 */ 545 static void __update_default_selected(struct port *port) 546 { 547 if (port) { 548 const struct port_params *admin = &port->partner_admin; 549 const struct port_params *oper = &port->partner_oper; 550 551 // check if any parameter is different 552 if (admin->port_number != oper->port_number 553 || admin->port_priority != oper->port_priority 554 || MAC_ADDRESS_COMPARE(&admin->system, &oper->system) 555 || admin->system_priority != oper->system_priority 556 || admin->key != oper->key 557 || (admin->port_state & AD_STATE_AGGREGATION) 558 != (oper->port_state & AD_STATE_AGGREGATION)) { 559 // update the state machine Selected variable 560 port->sm_vars &= ~AD_PORT_SELECTED; 561 } 562 } 563 } 564 565 /** 566 * __choose_matched - update a port's matched variable from a received lacpdu 567 * @lacpdu: the lacpdu we've received 568 * @port: the port we're looking at 569 * 570 * Update the value of the matched variable, using parameter values from a 571 * newly received lacpdu. Parameter values for the partner carried in the 572 * received PDU are compared with the corresponding operational parameter 573 * values for the actor. Matched is set to TRUE if all of these parameters 574 * match and the PDU parameter partner_state.aggregation has the same value as 575 * actor_oper_port_state.aggregation and lacp will actively maintain the link 576 * in the aggregation. Matched is also set to TRUE if the value of 577 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 578 * an individual link and lacp will actively maintain the link. Otherwise, 579 * matched is set to FALSE. LACP is considered to be actively maintaining the 580 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 581 * the actor's actor_oper_port_state.lacp_activity and the PDU's 582 * partner_state.lacp_activity variables are TRUE. 583 */ 584 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 585 { 586 // validate lacpdu and port 587 if (lacpdu && port) { 588 // check if all parameters are alike 589 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 590 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 591 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && 592 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 593 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 594 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 595 // or this is individual link(aggregation == FALSE) 596 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 597 ) { 598 // update the state machine Matched variable 599 port->sm_vars |= AD_PORT_MATCHED; 600 } else { 601 port->sm_vars &= ~AD_PORT_MATCHED; 602 } 603 } 604 } 605 606 /** 607 * __update_ntt - update a port's ntt variable from a received lacpdu 608 * @lacpdu: the lacpdu we've received 609 * @port: the port we're looking at 610 * 611 * Updates the value of the ntt variable, using parameter values from a newly 612 * received lacpdu. The parameter values for the partner carried in the 613 * received PDU are compared with the corresponding operational parameter 614 * values for the Actor. If one or more of the comparisons shows that the 615 * value(s) received in the PDU differ from the current operational values, 616 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 617 */ 618 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 619 { 620 // validate lacpdu and port 621 if (lacpdu && port) { 622 // check if any parameter is different 623 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 624 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 625 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || 626 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 627 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 628 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 629 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 630 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 631 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 632 ) { 633 634 port->ntt = true; 635 } 636 } 637 } 638 639 /** 640 * __attach_bond_to_agg 641 * @port: the port we're looking at 642 * 643 * Handle the attaching of the port's control parser/multiplexer and the 644 * aggregator. This function does nothing since the parser/multiplexer of the 645 * receive and the parser/multiplexer of the aggregator are already combined. 646 */ 647 static void __attach_bond_to_agg(struct port *port) 648 { 649 port=NULL; // just to satisfy the compiler 650 // This function does nothing since the parser/multiplexer of the receive 651 // and the parser/multiplexer of the aggregator are already combined 652 } 653 654 /** 655 * __detach_bond_from_agg 656 * @port: the port we're looking at 657 * 658 * Handle the detaching of the port's control parser/multiplexer from the 659 * aggregator. This function does nothing since the parser/multiplexer of the 660 * receive and the parser/multiplexer of the aggregator are already combined. 661 */ 662 static void __detach_bond_from_agg(struct port *port) 663 { 664 port=NULL; // just to satisfy the compiler 665 // This function does nothing sience the parser/multiplexer of the receive 666 // and the parser/multiplexer of the aggregator are already combined 667 } 668 669 /** 670 * __agg_ports_are_ready - check if all ports in an aggregator are ready 671 * @aggregator: the aggregator we're looking at 672 * 673 */ 674 static int __agg_ports_are_ready(struct aggregator *aggregator) 675 { 676 struct port *port; 677 int retval = 1; 678 679 if (aggregator) { 680 // scan all ports in this aggregator to verfy if they are all ready 681 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 682 if (!(port->sm_vars & AD_PORT_READY_N)) { 683 retval = 0; 684 break; 685 } 686 } 687 } 688 689 return retval; 690 } 691 692 /** 693 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 694 * @aggregator: the aggregator we're looking at 695 * @val: Should the ports' ready bit be set on or off 696 * 697 */ 698 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 699 { 700 struct port *port; 701 702 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 703 if (val) { 704 port->sm_vars |= AD_PORT_READY; 705 } else { 706 port->sm_vars &= ~AD_PORT_READY; 707 } 708 } 709 } 710 711 /** 712 * __get_agg_bandwidth - get the total bandwidth of an aggregator 713 * @aggregator: the aggregator we're looking at 714 * 715 */ 716 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 717 { 718 u32 bandwidth=0; 719 u32 basic_speed; 720 721 if (aggregator->num_of_ports) { 722 basic_speed = __get_link_speed(aggregator->lag_ports); 723 switch (basic_speed) { 724 case AD_LINK_SPEED_BITMASK_1MBPS: 725 bandwidth = aggregator->num_of_ports; 726 break; 727 case AD_LINK_SPEED_BITMASK_10MBPS: 728 bandwidth = aggregator->num_of_ports * 10; 729 break; 730 case AD_LINK_SPEED_BITMASK_100MBPS: 731 bandwidth = aggregator->num_of_ports * 100; 732 break; 733 case AD_LINK_SPEED_BITMASK_1000MBPS: 734 bandwidth = aggregator->num_of_ports * 1000; 735 break; 736 case AD_LINK_SPEED_BITMASK_10000MBPS: 737 bandwidth = aggregator->num_of_ports * 10000; 738 break; 739 default: 740 bandwidth=0; // to silent the compilor .... 741 } 742 } 743 return bandwidth; 744 } 745 746 /** 747 * __get_active_agg - get the current active aggregator 748 * @aggregator: the aggregator we're looking at 749 * 750 */ 751 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 752 { 753 struct aggregator *retval = NULL; 754 755 for (; aggregator; aggregator = __get_next_agg(aggregator)) { 756 if (aggregator->is_active) { 757 retval = aggregator; 758 break; 759 } 760 } 761 762 return retval; 763 } 764 765 /** 766 * __update_lacpdu_from_port - update a port's lacpdu fields 767 * @port: the port we're looking at 768 * 769 */ 770 static inline void __update_lacpdu_from_port(struct port *port) 771 { 772 struct lacpdu *lacpdu = &port->lacpdu; 773 const struct port_params *partner = &port->partner_oper; 774 775 /* update current actual Actor parameters */ 776 /* lacpdu->subtype initialized 777 * lacpdu->version_number initialized 778 * lacpdu->tlv_type_actor_info initialized 779 * lacpdu->actor_information_length initialized 780 */ 781 782 lacpdu->actor_system_priority = htons(port->actor_system_priority); 783 lacpdu->actor_system = port->actor_system; 784 lacpdu->actor_key = htons(port->actor_oper_port_key); 785 lacpdu->actor_port_priority = htons(port->actor_port_priority); 786 lacpdu->actor_port = htons(port->actor_port_number); 787 lacpdu->actor_state = port->actor_oper_port_state; 788 789 /* lacpdu->reserved_3_1 initialized 790 * lacpdu->tlv_type_partner_info initialized 791 * lacpdu->partner_information_length initialized 792 */ 793 794 lacpdu->partner_system_priority = htons(partner->system_priority); 795 lacpdu->partner_system = partner->system; 796 lacpdu->partner_key = htons(partner->key); 797 lacpdu->partner_port_priority = htons(partner->port_priority); 798 lacpdu->partner_port = htons(partner->port_number); 799 lacpdu->partner_state = partner->port_state; 800 801 /* lacpdu->reserved_3_2 initialized 802 * lacpdu->tlv_type_collector_info initialized 803 * lacpdu->collector_information_length initialized 804 * collector_max_delay initialized 805 * reserved_12[12] initialized 806 * tlv_type_terminator initialized 807 * terminator_length initialized 808 * reserved_50[50] initialized 809 */ 810 } 811 812 ////////////////////////////////////////////////////////////////////////////////////// 813 // ================= main 802.3ad protocol code ====================================== 814 ////////////////////////////////////////////////////////////////////////////////////// 815 816 /** 817 * ad_lacpdu_send - send out a lacpdu packet on a given port 818 * @port: the port we're looking at 819 * 820 * Returns: 0 on success 821 * < 0 on error 822 */ 823 static int ad_lacpdu_send(struct port *port) 824 { 825 struct slave *slave = port->slave; 826 struct sk_buff *skb; 827 struct lacpdu_header *lacpdu_header; 828 int length = sizeof(struct lacpdu_header); 829 830 skb = dev_alloc_skb(length); 831 if (!skb) { 832 return -ENOMEM; 833 } 834 835 skb->dev = slave->dev; 836 skb_reset_mac_header(skb); 837 skb->network_header = skb->mac_header + ETH_HLEN; 838 skb->protocol = PKT_TYPE_LACPDU; 839 skb->priority = TC_PRIO_CONTROL; 840 841 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 842 843 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); 844 /* Note: source addres is set to be the member's PERMANENT address, 845 because we use it to identify loopback lacpdus in receive. */ 846 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); 847 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 848 849 lacpdu_header->lacpdu = port->lacpdu; // struct copy 850 851 dev_queue_xmit(skb); 852 853 return 0; 854 } 855 856 /** 857 * ad_marker_send - send marker information/response on a given port 858 * @port: the port we're looking at 859 * @marker: marker data to send 860 * 861 * Returns: 0 on success 862 * < 0 on error 863 */ 864 static int ad_marker_send(struct port *port, struct bond_marker *marker) 865 { 866 struct slave *slave = port->slave; 867 struct sk_buff *skb; 868 struct bond_marker_header *marker_header; 869 int length = sizeof(struct bond_marker_header); 870 871 skb = dev_alloc_skb(length + 16); 872 if (!skb) { 873 return -ENOMEM; 874 } 875 876 skb_reserve(skb, 16); 877 878 skb->dev = slave->dev; 879 skb_reset_mac_header(skb); 880 skb->network_header = skb->mac_header + ETH_HLEN; 881 skb->protocol = PKT_TYPE_LACPDU; 882 883 marker_header = (struct bond_marker_header *)skb_put(skb, length); 884 885 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); 886 /* Note: source addres is set to be the member's PERMANENT address, 887 because we use it to identify loopback MARKERs in receive. */ 888 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); 889 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 890 891 marker_header->marker = *marker; // struct copy 892 893 dev_queue_xmit(skb); 894 895 return 0; 896 } 897 898 /** 899 * ad_mux_machine - handle a port's mux state machine 900 * @port: the port we're looking at 901 * 902 */ 903 static void ad_mux_machine(struct port *port) 904 { 905 mux_states_t last_state; 906 907 // keep current State Machine state to compare later if it was changed 908 last_state = port->sm_mux_state; 909 910 if (port->sm_vars & AD_PORT_BEGIN) { 911 port->sm_mux_state = AD_MUX_DETACHED; // next state 912 } else { 913 switch (port->sm_mux_state) { 914 case AD_MUX_DETACHED: 915 if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY 916 port->sm_mux_state = AD_MUX_WAITING; // next state 917 } 918 break; 919 case AD_MUX_WAITING: 920 // if SELECTED == FALSE return to DETACH state 921 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED 922 port->sm_vars &= ~AD_PORT_READY_N; 923 // in order to withhold the Selection Logic to check all ports READY_N value 924 // every callback cycle to update ready variable, we check READY_N and update READY here 925 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 926 port->sm_mux_state = AD_MUX_DETACHED; // next state 927 break; 928 } 929 930 // check if the wait_while_timer expired 931 if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) { 932 port->sm_vars |= AD_PORT_READY_N; 933 } 934 935 // in order to withhold the selection logic to check all ports READY_N value 936 // every callback cycle to update ready variable, we check READY_N and update READY here 937 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 938 939 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state 940 if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) { 941 port->sm_mux_state = AD_MUX_ATTACHED; // next state 942 } 943 break; 944 case AD_MUX_ATTACHED: 945 // check also if agg_select_timer expired(so the edable port will take place only after this timer) 946 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { 947 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state 948 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY 949 port->sm_vars &= ~AD_PORT_READY_N; 950 // in order to withhold the selection logic to check all ports READY_N value 951 // every callback cycle to update ready variable, we check READY_N and update READY here 952 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 953 port->sm_mux_state = AD_MUX_DETACHED;// next state 954 } 955 break; 956 case AD_MUX_COLLECTING_DISTRIBUTING: 957 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || 958 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) 959 ) { 960 port->sm_mux_state = AD_MUX_ATTACHED;// next state 961 962 } else { 963 // if port state hasn't changed make 964 // sure that a collecting distributing 965 // port in an active aggregator is enabled 966 if (port->aggregator && 967 port->aggregator->is_active && 968 !__port_is_enabled(port)) { 969 970 __enable_port(port); 971 } 972 } 973 break; 974 default: //to silence the compiler 975 break; 976 } 977 } 978 979 // check if the state machine was changed 980 if (port->sm_mux_state != last_state) { 981 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state); 982 switch (port->sm_mux_state) { 983 case AD_MUX_DETACHED: 984 __detach_bond_from_agg(port); 985 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 986 ad_disable_collecting_distributing(port); 987 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 988 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 989 port->ntt = true; 990 break; 991 case AD_MUX_WAITING: 992 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 993 break; 994 case AD_MUX_ATTACHED: 995 __attach_bond_to_agg(port); 996 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 997 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 998 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 999 ad_disable_collecting_distributing(port); 1000 port->ntt = true; 1001 break; 1002 case AD_MUX_COLLECTING_DISTRIBUTING: 1003 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1004 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1005 ad_enable_collecting_distributing(port); 1006 port->ntt = true; 1007 break; 1008 default: //to silence the compiler 1009 break; 1010 } 1011 } 1012 } 1013 1014 /** 1015 * ad_rx_machine - handle a port's rx State Machine 1016 * @lacpdu: the lacpdu we've received 1017 * @port: the port we're looking at 1018 * 1019 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1020 * CURRENT. If timer expired set the state machine in the proper state. 1021 * In other cases, this function checks if we need to switch to other state. 1022 */ 1023 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1024 { 1025 rx_states_t last_state; 1026 1027 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback) 1028 __get_rx_machine_lock(port); 1029 1030 // keep current State Machine state to compare later if it was changed 1031 last_state = port->sm_rx_state; 1032 1033 // check if state machine should change state 1034 // first, check if port was reinitialized 1035 if (port->sm_vars & AD_PORT_BEGIN) { 1036 port->sm_rx_state = AD_RX_INITIALIZE; // next state 1037 } 1038 // check if port is not enabled 1039 else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) { 1040 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state 1041 } 1042 // check if new lacpdu arrived 1043 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { 1044 port->sm_rx_timer_counter = 0; // zero timer 1045 port->sm_rx_state = AD_RX_CURRENT; 1046 } else { 1047 // if timer is on, and if it is expired 1048 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { 1049 switch (port->sm_rx_state) { 1050 case AD_RX_EXPIRED: 1051 port->sm_rx_state = AD_RX_DEFAULTED; // next state 1052 break; 1053 case AD_RX_CURRENT: 1054 port->sm_rx_state = AD_RX_EXPIRED; // next state 1055 break; 1056 default: //to silence the compiler 1057 break; 1058 } 1059 } else { 1060 // if no lacpdu arrived and no timer is on 1061 switch (port->sm_rx_state) { 1062 case AD_RX_PORT_DISABLED: 1063 if (port->sm_vars & AD_PORT_MOVED) { 1064 port->sm_rx_state = AD_RX_INITIALIZE; // next state 1065 } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1066 port->sm_rx_state = AD_RX_EXPIRED; // next state 1067 } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) { 1068 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state 1069 } 1070 break; 1071 default: //to silence the compiler 1072 break; 1073 1074 } 1075 } 1076 } 1077 1078 // check if the State machine was changed or new lacpdu arrived 1079 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1080 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state); 1081 switch (port->sm_rx_state) { 1082 case AD_RX_INITIALIZE: 1083 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { 1084 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1085 } else { 1086 port->sm_vars |= AD_PORT_LACP_ENABLED; 1087 } 1088 port->sm_vars &= ~AD_PORT_SELECTED; 1089 __record_default(port); 1090 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1091 port->sm_vars &= ~AD_PORT_MOVED; 1092 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state 1093 1094 /*- Fall Through -*/ 1095 1096 case AD_RX_PORT_DISABLED: 1097 port->sm_vars &= ~AD_PORT_MATCHED; 1098 break; 1099 case AD_RX_LACP_DISABLED: 1100 port->sm_vars &= ~AD_PORT_SELECTED; 1101 __record_default(port); 1102 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1103 port->sm_vars |= AD_PORT_MATCHED; 1104 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1105 break; 1106 case AD_RX_EXPIRED: 1107 //Reset of the Synchronization flag. (Standard 43.4.12) 1108 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the 1109 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. 1110 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1111 port->sm_vars &= ~AD_PORT_MATCHED; 1112 port->partner_oper.port_state |= AD_SHORT_TIMEOUT; 1113 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1114 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1115 break; 1116 case AD_RX_DEFAULTED: 1117 __update_default_selected(port); 1118 __record_default(port); 1119 port->sm_vars |= AD_PORT_MATCHED; 1120 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1121 break; 1122 case AD_RX_CURRENT: 1123 // detect loopback situation 1124 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { 1125 // INFO_RECEIVED_LOOPBACK_FRAMES 1126 printk(KERN_ERR DRV_NAME ": %s: An illegal loopback occurred on " 1127 "adapter (%s). Check the configuration to verify that all " 1128 "Adapters are connected to 802.3ad compliant switch ports\n", 1129 port->slave->dev->master->name, port->slave->dev->name); 1130 __release_rx_machine_lock(port); 1131 return; 1132 } 1133 __update_selected(lacpdu, port); 1134 __update_ntt(lacpdu, port); 1135 __record_pdu(lacpdu, port); 1136 __choose_matched(lacpdu, port); 1137 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1138 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1139 // verify that if the aggregator is enabled, the port is enabled too. 1140 //(because if the link goes down for a short time, the 802.3ad will not 1141 // catch it, and the port will continue to be disabled) 1142 if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) { 1143 __enable_port(port); 1144 } 1145 break; 1146 default: //to silence the compiler 1147 break; 1148 } 1149 } 1150 __release_rx_machine_lock(port); 1151 } 1152 1153 /** 1154 * ad_tx_machine - handle a port's tx state machine 1155 * @port: the port we're looking at 1156 * 1157 */ 1158 static void ad_tx_machine(struct port *port) 1159 { 1160 // check if tx timer expired, to verify that we do not send more than 3 packets per second 1161 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1162 // check if there is something to send 1163 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1164 __update_lacpdu_from_port(port); 1165 1166 if (ad_lacpdu_send(port) >= 0) { 1167 pr_debug("Sent LACPDU on port %d\n", port->actor_port_number); 1168 1169 /* mark ntt as false, so it will not be sent again until 1170 demanded */ 1171 port->ntt = false; 1172 } 1173 } 1174 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND 1175 port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1176 } 1177 } 1178 1179 /** 1180 * ad_periodic_machine - handle a port's periodic state machine 1181 * @port: the port we're looking at 1182 * 1183 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1184 */ 1185 static void ad_periodic_machine(struct port *port) 1186 { 1187 periodic_states_t last_state; 1188 1189 // keep current state machine state to compare later if it was changed 1190 last_state = port->sm_periodic_state; 1191 1192 // check if port was reinitialized 1193 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1194 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1195 ) { 1196 port->sm_periodic_state = AD_NO_PERIODIC; // next state 1197 } 1198 // check if state machine should change state 1199 else if (port->sm_periodic_timer_counter) { 1200 // check if periodic state machine expired 1201 if (!(--port->sm_periodic_timer_counter)) { 1202 // if expired then do tx 1203 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1204 } else { 1205 // If not expired, check if there is some new timeout parameter from the partner state 1206 switch (port->sm_periodic_state) { 1207 case AD_FAST_PERIODIC: 1208 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1209 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1210 } 1211 break; 1212 case AD_SLOW_PERIODIC: 1213 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1214 // stop current timer 1215 port->sm_periodic_timer_counter = 0; 1216 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1217 } 1218 break; 1219 default: //to silence the compiler 1220 break; 1221 } 1222 } 1223 } else { 1224 switch (port->sm_periodic_state) { 1225 case AD_NO_PERIODIC: 1226 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1227 break; 1228 case AD_PERIODIC_TX: 1229 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1230 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1231 } else { 1232 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1233 } 1234 break; 1235 default: //to silence the compiler 1236 break; 1237 } 1238 } 1239 1240 // check if the state machine was changed 1241 if (port->sm_periodic_state != last_state) { 1242 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state); 1243 switch (port->sm_periodic_state) { 1244 case AD_NO_PERIODIC: 1245 port->sm_periodic_timer_counter = 0; // zero timer 1246 break; 1247 case AD_FAST_PERIODIC: 1248 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 1249 break; 1250 case AD_SLOW_PERIODIC: 1251 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 1252 break; 1253 case AD_PERIODIC_TX: 1254 port->ntt = true; 1255 break; 1256 default: //to silence the compiler 1257 break; 1258 } 1259 } 1260 } 1261 1262 /** 1263 * ad_port_selection_logic - select aggregation groups 1264 * @port: the port we're looking at 1265 * 1266 * Select aggregation groups, and assign each port for it's aggregetor. The 1267 * selection logic is called in the inititalization (after all the handshkes), 1268 * and after every lacpdu receive (if selected is off). 1269 */ 1270 static void ad_port_selection_logic(struct port *port) 1271 { 1272 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1273 struct port *last_port = NULL, *curr_port; 1274 int found = 0; 1275 1276 // if the port is already Selected, do nothing 1277 if (port->sm_vars & AD_PORT_SELECTED) { 1278 return; 1279 } 1280 1281 // if the port is connected to other aggregator, detach it 1282 if (port->aggregator) { 1283 // detach the port from its former aggregator 1284 temp_aggregator=port->aggregator; 1285 for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) { 1286 if (curr_port == port) { 1287 temp_aggregator->num_of_ports--; 1288 if (!last_port) {// if it is the first port attached to the aggregator 1289 temp_aggregator->lag_ports=port->next_port_in_aggregator; 1290 } else {// not the first port attached to the aggregator 1291 last_port->next_port_in_aggregator=port->next_port_in_aggregator; 1292 } 1293 1294 // clear the port's relations to this aggregator 1295 port->aggregator = NULL; 1296 port->next_port_in_aggregator=NULL; 1297 port->actor_port_aggregator_identifier=0; 1298 1299 pr_debug("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier); 1300 // if the aggregator is empty, clear its parameters, and set it ready to be attached 1301 if (!temp_aggregator->lag_ports) { 1302 ad_clear_agg(temp_aggregator); 1303 } 1304 break; 1305 } 1306 } 1307 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list 1308 printk(KERN_WARNING DRV_NAME ": %s: Warning: Port %d (on %s) was " 1309 "related to aggregator %d but was not on its port list\n", 1310 port->slave->dev->master->name, 1311 port->actor_port_number, port->slave->dev->name, 1312 port->aggregator->aggregator_identifier); 1313 } 1314 } 1315 // search on all aggregators for a suitable aggregator for this port 1316 for (aggregator = __get_first_agg(port); aggregator; 1317 aggregator = __get_next_agg(aggregator)) { 1318 1319 // keep a free aggregator for later use(if needed) 1320 if (!aggregator->lag_ports) { 1321 if (!free_aggregator) { 1322 free_aggregator=aggregator; 1323 } 1324 continue; 1325 } 1326 // check if current aggregator suits us 1327 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND 1328 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) && 1329 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1330 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1331 ) && 1332 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers 1333 !aggregator->is_individual) // but is not individual OR 1334 ) 1335 ) { 1336 // attach to the founded aggregator 1337 port->aggregator = aggregator; 1338 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; 1339 port->next_port_in_aggregator=aggregator->lag_ports; 1340 port->aggregator->num_of_ports++; 1341 aggregator->lag_ports=port; 1342 pr_debug("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1343 1344 // mark this port as selected 1345 port->sm_vars |= AD_PORT_SELECTED; 1346 found = 1; 1347 break; 1348 } 1349 } 1350 1351 // the port couldn't find an aggregator - attach it to a new aggregator 1352 if (!found) { 1353 if (free_aggregator) { 1354 // assign port a new aggregator 1355 port->aggregator = free_aggregator; 1356 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; 1357 1358 // update the new aggregator's parameters 1359 // if port was responsed from the end-user 1360 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex 1361 port->aggregator->is_individual = false; 1362 } else { 1363 port->aggregator->is_individual = true; 1364 } 1365 1366 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; 1367 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; 1368 port->aggregator->partner_system=port->partner_oper.system; 1369 port->aggregator->partner_system_priority = port->partner_oper.system_priority; 1370 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1371 port->aggregator->receive_state = 1; 1372 port->aggregator->transmit_state = 1; 1373 port->aggregator->lag_ports = port; 1374 port->aggregator->num_of_ports++; 1375 1376 // mark this port as selected 1377 port->sm_vars |= AD_PORT_SELECTED; 1378 1379 pr_debug("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1380 } else { 1381 printk(KERN_ERR DRV_NAME ": %s: Port %d (on %s) did not find a suitable aggregator\n", 1382 port->slave->dev->master->name, 1383 port->actor_port_number, port->slave->dev->name); 1384 } 1385 } 1386 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports 1387 // else set ready=FALSE in all aggregator's ports 1388 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1389 1390 aggregator = __get_first_agg(port); 1391 ad_agg_selection_logic(aggregator); 1392 } 1393 1394 /* 1395 * Decide if "agg" is a better choice for the new active aggregator that 1396 * the current best, according to the ad_select policy. 1397 */ 1398 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1399 struct aggregator *curr) 1400 { 1401 /* 1402 * 0. If no best, select current. 1403 * 1404 * 1. If the current agg is not individual, and the best is 1405 * individual, select current. 1406 * 1407 * 2. If current agg is individual and the best is not, keep best. 1408 * 1409 * 3. Therefore, current and best are both individual or both not 1410 * individual, so: 1411 * 1412 * 3a. If current agg partner replied, and best agg partner did not, 1413 * select current. 1414 * 1415 * 3b. If current agg partner did not reply and best agg partner 1416 * did reply, keep best. 1417 * 1418 * 4. Therefore, current and best both have partner replies or 1419 * both do not, so perform selection policy: 1420 * 1421 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1422 * select by bandwidth. 1423 * 1424 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1425 */ 1426 if (!best) 1427 return curr; 1428 1429 if (!curr->is_individual && best->is_individual) 1430 return curr; 1431 1432 if (curr->is_individual && !best->is_individual) 1433 return best; 1434 1435 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1436 return curr; 1437 1438 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1439 return best; 1440 1441 switch (__get_agg_selection_mode(curr->lag_ports)) { 1442 case BOND_AD_COUNT: 1443 if (curr->num_of_ports > best->num_of_ports) 1444 return curr; 1445 1446 if (curr->num_of_ports < best->num_of_ports) 1447 return best; 1448 1449 /*FALLTHROUGH*/ 1450 case BOND_AD_STABLE: 1451 case BOND_AD_BANDWIDTH: 1452 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1453 return curr; 1454 1455 break; 1456 1457 default: 1458 printk(KERN_WARNING DRV_NAME 1459 ": %s: Impossible agg select mode %d\n", 1460 curr->slave->dev->master->name, 1461 __get_agg_selection_mode(curr->lag_ports)); 1462 break; 1463 } 1464 1465 return best; 1466 } 1467 1468 /** 1469 * ad_agg_selection_logic - select an aggregation group for a team 1470 * @aggregator: the aggregator we're looking at 1471 * 1472 * It is assumed that only one aggregator may be selected for a team. 1473 * 1474 * The logic of this function is to select the aggregator according to 1475 * the ad_select policy: 1476 * 1477 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1478 * it, and to reselect the active aggregator only if the previous 1479 * aggregator has no more ports related to it. 1480 * 1481 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1482 * bandwidth, and reselect whenever a link state change takes place or the 1483 * set of slaves in the bond changes. 1484 * 1485 * BOND_AD_COUNT: select the aggregator with largest number of ports 1486 * (slaves), and reselect whenever a link state change takes place or the 1487 * set of slaves in the bond changes. 1488 * 1489 * FIXME: this function MUST be called with the first agg in the bond, or 1490 * __get_active_agg() won't work correctly. This function should be better 1491 * called with the bond itself, and retrieve the first agg from it. 1492 */ 1493 static void ad_agg_selection_logic(struct aggregator *agg) 1494 { 1495 struct aggregator *best, *active, *origin; 1496 struct port *port; 1497 1498 origin = agg; 1499 1500 active = __get_active_agg(agg); 1501 best = active; 1502 1503 do { 1504 agg->is_active = 0; 1505 1506 if (agg->num_of_ports) 1507 best = ad_agg_selection_test(best, agg); 1508 1509 } while ((agg = __get_next_agg(agg))); 1510 1511 if (best && 1512 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1513 /* 1514 * For the STABLE policy, don't replace the old active 1515 * aggregator if it's still active (it has an answering 1516 * partner) or if both the best and active don't have an 1517 * answering partner. 1518 */ 1519 if (active && active->lag_ports && 1520 active->lag_ports->is_enabled && 1521 (__agg_has_partner(active) || 1522 (!__agg_has_partner(active) && !__agg_has_partner(best)))) { 1523 if (!(!active->actor_oper_aggregator_key && 1524 best->actor_oper_aggregator_key)) { 1525 best = NULL; 1526 active->is_active = 1; 1527 } 1528 } 1529 } 1530 1531 if (best && (best == active)) { 1532 best = NULL; 1533 active->is_active = 1; 1534 } 1535 1536 // if there is new best aggregator, activate it 1537 if (best) { 1538 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1539 best->aggregator_identifier, best->num_of_ports, 1540 best->actor_oper_aggregator_key, 1541 best->partner_oper_aggregator_key, 1542 best->is_individual, best->is_active); 1543 pr_debug("best ports %p slave %p %s\n", 1544 best->lag_ports, best->slave, 1545 best->slave ? best->slave->dev->name : "NULL"); 1546 1547 for (agg = __get_first_agg(best->lag_ports); agg; 1548 agg = __get_next_agg(agg)) { 1549 1550 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1551 agg->aggregator_identifier, agg->num_of_ports, 1552 agg->actor_oper_aggregator_key, 1553 agg->partner_oper_aggregator_key, 1554 agg->is_individual, agg->is_active); 1555 } 1556 1557 // check if any partner replys 1558 if (best->is_individual) { 1559 printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad" 1560 " response from the link partner for any" 1561 " adapters in the bond\n", 1562 best->slave->dev->master->name); 1563 } 1564 1565 best->is_active = 1; 1566 pr_debug("LAG %d chosen as the active LAG\n", 1567 best->aggregator_identifier); 1568 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1569 best->aggregator_identifier, best->num_of_ports, 1570 best->actor_oper_aggregator_key, 1571 best->partner_oper_aggregator_key, 1572 best->is_individual, best->is_active); 1573 1574 // disable the ports that were related to the former active_aggregator 1575 if (active) { 1576 for (port = active->lag_ports; port; 1577 port = port->next_port_in_aggregator) { 1578 __disable_port(port); 1579 } 1580 } 1581 } 1582 1583 /* 1584 * if the selected aggregator is of join individuals 1585 * (partner_system is NULL), enable their ports 1586 */ 1587 active = __get_active_agg(origin); 1588 1589 if (active) { 1590 if (!__agg_has_partner(active)) { 1591 for (port = active->lag_ports; port; 1592 port = port->next_port_in_aggregator) { 1593 __enable_port(port); 1594 } 1595 } 1596 } 1597 1598 if (origin->slave) { 1599 struct bonding *bond; 1600 1601 bond = bond_get_bond_by_slave(origin->slave); 1602 if (bond) 1603 bond_3ad_set_carrier(bond); 1604 } 1605 } 1606 1607 /** 1608 * ad_clear_agg - clear a given aggregator's parameters 1609 * @aggregator: the aggregator we're looking at 1610 * 1611 */ 1612 static void ad_clear_agg(struct aggregator *aggregator) 1613 { 1614 if (aggregator) { 1615 aggregator->is_individual = false; 1616 aggregator->actor_admin_aggregator_key = 0; 1617 aggregator->actor_oper_aggregator_key = 0; 1618 aggregator->partner_system = null_mac_addr; 1619 aggregator->partner_system_priority = 0; 1620 aggregator->partner_oper_aggregator_key = 0; 1621 aggregator->receive_state = 0; 1622 aggregator->transmit_state = 0; 1623 aggregator->lag_ports = NULL; 1624 aggregator->is_active = 0; 1625 aggregator->num_of_ports = 0; 1626 pr_debug("LAG %d was cleared\n", aggregator->aggregator_identifier); 1627 } 1628 } 1629 1630 /** 1631 * ad_initialize_agg - initialize a given aggregator's parameters 1632 * @aggregator: the aggregator we're looking at 1633 * 1634 */ 1635 static void ad_initialize_agg(struct aggregator *aggregator) 1636 { 1637 if (aggregator) { 1638 ad_clear_agg(aggregator); 1639 1640 aggregator->aggregator_mac_address = null_mac_addr; 1641 aggregator->aggregator_identifier = 0; 1642 aggregator->slave = NULL; 1643 } 1644 } 1645 1646 /** 1647 * ad_initialize_port - initialize a given port's parameters 1648 * @aggregator: the aggregator we're looking at 1649 * @lacp_fast: boolean. whether fast periodic should be used 1650 * 1651 */ 1652 static void ad_initialize_port(struct port *port, int lacp_fast) 1653 { 1654 static const struct port_params tmpl = { 1655 .system_priority = 0xffff, 1656 .key = 1, 1657 .port_number = 1, 1658 .port_priority = 0xff, 1659 .port_state = 1, 1660 }; 1661 static const struct lacpdu lacpdu = { 1662 .subtype = 0x01, 1663 .version_number = 0x01, 1664 .tlv_type_actor_info = 0x01, 1665 .actor_information_length = 0x14, 1666 .tlv_type_partner_info = 0x02, 1667 .partner_information_length = 0x14, 1668 .tlv_type_collector_info = 0x03, 1669 .collector_information_length = 0x10, 1670 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1671 }; 1672 1673 if (port) { 1674 port->actor_port_number = 1; 1675 port->actor_port_priority = 0xff; 1676 port->actor_system = null_mac_addr; 1677 port->actor_system_priority = 0xffff; 1678 port->actor_port_aggregator_identifier = 0; 1679 port->ntt = false; 1680 port->actor_admin_port_key = 1; 1681 port->actor_oper_port_key = 1; 1682 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1683 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1684 1685 if (lacp_fast) { 1686 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1687 } 1688 1689 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1690 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1691 1692 port->is_enabled = true; 1693 // ****** private parameters ****** 1694 port->sm_vars = 0x3; 1695 port->sm_rx_state = 0; 1696 port->sm_rx_timer_counter = 0; 1697 port->sm_periodic_state = 0; 1698 port->sm_periodic_timer_counter = 0; 1699 port->sm_mux_state = 0; 1700 port->sm_mux_timer_counter = 0; 1701 port->sm_tx_state = 0; 1702 port->sm_tx_timer_counter = 0; 1703 port->slave = NULL; 1704 port->aggregator = NULL; 1705 port->next_port_in_aggregator = NULL; 1706 port->transaction_id = 0; 1707 1708 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1709 } 1710 } 1711 1712 /** 1713 * ad_enable_collecting_distributing - enable a port's transmit/receive 1714 * @port: the port we're looking at 1715 * 1716 * Enable @port if it's in an active aggregator 1717 */ 1718 static void ad_enable_collecting_distributing(struct port *port) 1719 { 1720 if (port->aggregator->is_active) { 1721 pr_debug("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1722 __enable_port(port); 1723 } 1724 } 1725 1726 /** 1727 * ad_disable_collecting_distributing - disable a port's transmit/receive 1728 * @port: the port we're looking at 1729 * 1730 */ 1731 static void ad_disable_collecting_distributing(struct port *port) 1732 { 1733 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { 1734 pr_debug("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); 1735 __disable_port(port); 1736 } 1737 } 1738 1739 #if 0 1740 /** 1741 * ad_marker_info_send - send a marker information frame 1742 * @port: the port we're looking at 1743 * 1744 * This function does nothing since we decided not to implement send and handle 1745 * response for marker PDU's, in this stage, but only to respond to marker 1746 * information. 1747 */ 1748 static void ad_marker_info_send(struct port *port) 1749 { 1750 struct bond_marker marker; 1751 u16 index; 1752 1753 // fill the marker PDU with the appropriate values 1754 marker.subtype = 0x02; 1755 marker.version_number = 0x01; 1756 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; 1757 marker.marker_length = 0x16; 1758 // convert requester_port to Big Endian 1759 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); 1760 marker.requester_system = port->actor_system; 1761 // convert requester_port(u32) to Big Endian 1762 marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24)); 1763 marker.pad = 0; 1764 marker.tlv_type_terminator = 0x00; 1765 marker.terminator_length = 0x00; 1766 for (index=0; index<90; index++) { 1767 marker.reserved_90[index]=0; 1768 } 1769 1770 // send the marker information 1771 if (ad_marker_send(port, &marker) >= 0) { 1772 pr_debug("Sent Marker Information on port %d\n", port->actor_port_number); 1773 } 1774 } 1775 #endif 1776 1777 /** 1778 * ad_marker_info_received - handle receive of a Marker information frame 1779 * @marker_info: Marker info received 1780 * @port: the port we're looking at 1781 * 1782 */ 1783 static void ad_marker_info_received(struct bond_marker *marker_info, 1784 struct port *port) 1785 { 1786 struct bond_marker marker; 1787 1788 // copy the received marker data to the response marker 1789 //marker = *marker_info; 1790 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1791 // change the marker subtype to marker response 1792 marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE; 1793 // send the marker response 1794 1795 if (ad_marker_send(port, &marker) >= 0) { 1796 pr_debug("Sent Marker Response on port %d\n", port->actor_port_number); 1797 } 1798 } 1799 1800 /** 1801 * ad_marker_response_received - handle receive of a marker response frame 1802 * @marker: marker PDU received 1803 * @port: the port we're looking at 1804 * 1805 * This function does nothing since we decided not to implement send and handle 1806 * response for marker PDU's, in this stage, but only to respond to marker 1807 * information. 1808 */ 1809 static void ad_marker_response_received(struct bond_marker *marker, 1810 struct port *port) 1811 { 1812 marker=NULL; // just to satisfy the compiler 1813 port=NULL; // just to satisfy the compiler 1814 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW 1815 } 1816 1817 ////////////////////////////////////////////////////////////////////////////////////// 1818 // ================= AD exported functions to the main bonding code ================== 1819 ////////////////////////////////////////////////////////////////////////////////////// 1820 1821 // Check aggregators status in team every T seconds 1822 #define AD_AGGREGATOR_SELECTION_TIMER 8 1823 1824 /* 1825 * bond_3ad_initiate_agg_selection(struct bonding *bond) 1826 * 1827 * Set the aggregation selection timer, to initiate an agg selection in 1828 * the very near future. Called during first initialization, and during 1829 * any down to up transitions of the bond. 1830 */ 1831 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1832 { 1833 BOND_AD_INFO(bond).agg_select_timer = timeout; 1834 BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select; 1835 } 1836 1837 static u16 aggregator_identifier; 1838 1839 /** 1840 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1841 * @bond: bonding struct to work on 1842 * @tick_resolution: tick duration (millisecond resolution) 1843 * @lacp_fast: boolean. whether fast periodic should be used 1844 * 1845 * Can be called only after the mac address of the bond is set. 1846 */ 1847 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast) 1848 { 1849 // check that the bond is not initialized yet 1850 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) { 1851 1852 aggregator_identifier = 0; 1853 1854 BOND_AD_INFO(bond).lacp_fast = lacp_fast; 1855 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; 1856 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); 1857 1858 // initialize how many times this module is called in one second(should be about every 100ms) 1859 ad_ticks_per_sec = tick_resolution; 1860 1861 bond_3ad_initiate_agg_selection(bond, 1862 AD_AGGREGATOR_SELECTION_TIMER * 1863 ad_ticks_per_sec); 1864 } 1865 } 1866 1867 /** 1868 * bond_3ad_bind_slave - initialize a slave's port 1869 * @slave: slave struct to work on 1870 * 1871 * Returns: 0 on success 1872 * < 0 on error 1873 */ 1874 int bond_3ad_bind_slave(struct slave *slave) 1875 { 1876 struct bonding *bond = bond_get_bond_by_slave(slave); 1877 struct port *port; 1878 struct aggregator *aggregator; 1879 1880 if (bond == NULL) { 1881 printk(KERN_ERR DRV_NAME ": %s: The slave %s is not attached to its bond\n", 1882 slave->dev->master->name, slave->dev->name); 1883 return -1; 1884 } 1885 1886 //check that the slave has not been intialized yet. 1887 if (SLAVE_AD_INFO(slave).port.slave != slave) { 1888 1889 // port initialization 1890 port = &(SLAVE_AD_INFO(slave).port); 1891 1892 ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast); 1893 1894 port->slave = slave; 1895 port->actor_port_number = SLAVE_AD_INFO(slave).id; 1896 // key is determined according to the link speed, duplex and user key(which is yet not supported) 1897 // ------------------------------------------------------------ 1898 // Port key : | User key | Speed |Duplex| 1899 // ------------------------------------------------------------ 1900 // 16 6 1 0 1901 port->actor_admin_port_key = 0; // initialize this parameter 1902 port->actor_admin_port_key |= __get_duplex(port); 1903 port->actor_admin_port_key |= (__get_link_speed(port) << 1); 1904 port->actor_oper_port_key = port->actor_admin_port_key; 1905 // if the port is not full duplex, then the port should be not lacp Enabled 1906 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { 1907 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1908 } 1909 // actor system is the bond's system 1910 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 1911 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) 1912 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1913 port->aggregator = NULL; 1914 port->next_port_in_aggregator = NULL; 1915 1916 __disable_port(port); 1917 __initialize_port_locks(port); 1918 1919 1920 // aggregator initialization 1921 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1922 1923 ad_initialize_agg(aggregator); 1924 1925 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 1926 aggregator->aggregator_identifier = (++aggregator_identifier); 1927 aggregator->slave = slave; 1928 aggregator->is_active = 0; 1929 aggregator->num_of_ports = 0; 1930 } 1931 1932 return 0; 1933 } 1934 1935 /** 1936 * bond_3ad_unbind_slave - deinitialize a slave's port 1937 * @slave: slave struct to work on 1938 * 1939 * Search for the aggregator that is related to this port, remove the 1940 * aggregator and assign another aggregator for other port related to it 1941 * (if any), and remove the port. 1942 */ 1943 void bond_3ad_unbind_slave(struct slave *slave) 1944 { 1945 struct port *port, *prev_port, *temp_port; 1946 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 1947 int select_new_active_agg = 0; 1948 1949 // find the aggregator related to this slave 1950 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1951 1952 // find the port related to this slave 1953 port = &(SLAVE_AD_INFO(slave).port); 1954 1955 // if slave is null, the whole port is not initialized 1956 if (!port->slave) { 1957 printk(KERN_WARNING DRV_NAME ": Warning: %s: Trying to " 1958 "unbind an uninitialized port on %s\n", 1959 slave->dev->master->name, slave->dev->name); 1960 return; 1961 } 1962 1963 pr_debug("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier); 1964 1965 /* Tell the partner that this port is not suitable for aggregation */ 1966 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 1967 __update_lacpdu_from_port(port); 1968 ad_lacpdu_send(port); 1969 1970 // check if this aggregator is occupied 1971 if (aggregator->lag_ports) { 1972 // check if there are other ports related to this aggregator except 1973 // the port related to this slave(thats ensure us that there is a 1974 // reason to search for new aggregator, and that we will find one 1975 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { 1976 // find new aggregator for the related port(s) 1977 new_aggregator = __get_first_agg(port); 1978 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) { 1979 // if the new aggregator is empty, or it connected to to our port only 1980 if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) { 1981 break; 1982 } 1983 } 1984 // if new aggregator found, copy the aggregator's parameters 1985 // and connect the related lag_ports to the new aggregator 1986 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 1987 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier); 1988 1989 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { 1990 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", 1991 aggregator->slave->dev->master->name); 1992 // select new active aggregator 1993 select_new_active_agg = 1; 1994 } 1995 1996 new_aggregator->is_individual = aggregator->is_individual; 1997 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 1998 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 1999 new_aggregator->partner_system = aggregator->partner_system; 2000 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2001 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2002 new_aggregator->receive_state = aggregator->receive_state; 2003 new_aggregator->transmit_state = aggregator->transmit_state; 2004 new_aggregator->lag_ports = aggregator->lag_ports; 2005 new_aggregator->is_active = aggregator->is_active; 2006 new_aggregator->num_of_ports = aggregator->num_of_ports; 2007 2008 // update the information that is written on the ports about the aggregator 2009 for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) { 2010 temp_port->aggregator=new_aggregator; 2011 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2012 } 2013 2014 // clear the aggregator 2015 ad_clear_agg(aggregator); 2016 2017 if (select_new_active_agg) { 2018 ad_agg_selection_logic(__get_first_agg(port)); 2019 } 2020 } else { 2021 printk(KERN_WARNING DRV_NAME ": %s: Warning: unbinding aggregator, " 2022 "and could not find a new aggregator for its ports\n", 2023 slave->dev->master->name); 2024 } 2025 } else { // in case that the only port related to this aggregator is the one we want to remove 2026 select_new_active_agg = aggregator->is_active; 2027 // clear the aggregator 2028 ad_clear_agg(aggregator); 2029 if (select_new_active_agg) { 2030 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", 2031 slave->dev->master->name); 2032 // select new active aggregator 2033 ad_agg_selection_logic(__get_first_agg(port)); 2034 } 2035 } 2036 } 2037 2038 pr_debug("Unbinding port %d\n", port->actor_port_number); 2039 // find the aggregator that this port is connected to 2040 temp_aggregator = __get_first_agg(port); 2041 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) { 2042 prev_port = NULL; 2043 // search the port in the aggregator's related ports 2044 for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) { 2045 if (temp_port == port) { // the aggregator found - detach the port from this aggregator 2046 if (prev_port) { 2047 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2048 } else { 2049 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2050 } 2051 temp_aggregator->num_of_ports--; 2052 if (temp_aggregator->num_of_ports==0) { 2053 select_new_active_agg = temp_aggregator->is_active; 2054 // clear the aggregator 2055 ad_clear_agg(temp_aggregator); 2056 if (select_new_active_agg) { 2057 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", 2058 slave->dev->master->name); 2059 // select new active aggregator 2060 ad_agg_selection_logic(__get_first_agg(port)); 2061 } 2062 } 2063 break; 2064 } 2065 } 2066 } 2067 port->slave=NULL; 2068 } 2069 2070 /** 2071 * bond_3ad_state_machine_handler - handle state machines timeout 2072 * @bond: bonding struct to work on 2073 * 2074 * The state machine handling concept in this module is to check every tick 2075 * which state machine should operate any function. The execution order is 2076 * round robin, so when we have an interaction between state machines, the 2077 * reply of one to each other might be delayed until next tick. 2078 * 2079 * This function also complete the initialization when the agg_select_timer 2080 * times out, and it selects an aggregator for the ports that are yet not 2081 * related to any aggregator, and selects the active aggregator for a bond. 2082 */ 2083 void bond_3ad_state_machine_handler(struct work_struct *work) 2084 { 2085 struct bonding *bond = container_of(work, struct bonding, 2086 ad_work.work); 2087 struct port *port; 2088 struct aggregator *aggregator; 2089 2090 read_lock(&bond->lock); 2091 2092 if (bond->kill_timers) { 2093 goto out; 2094 } 2095 2096 //check if there are any slaves 2097 if (bond->slave_cnt == 0) { 2098 goto re_arm; 2099 } 2100 2101 // check if agg_select_timer timer after initialize is timed out 2102 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { 2103 // select the active aggregator for the bond 2104 if ((port = __get_first_port(bond))) { 2105 if (!port->slave) { 2106 printk(KERN_WARNING DRV_NAME ": %s: Warning: bond's first port is " 2107 "uninitialized\n", bond->dev->name); 2108 goto re_arm; 2109 } 2110 2111 aggregator = __get_first_agg(port); 2112 ad_agg_selection_logic(aggregator); 2113 } 2114 bond_3ad_set_carrier(bond); 2115 } 2116 2117 // for each port run the state machines 2118 for (port = __get_first_port(bond); port; port = __get_next_port(port)) { 2119 if (!port->slave) { 2120 printk(KERN_WARNING DRV_NAME ": %s: Warning: Found an uninitialized " 2121 "port\n", bond->dev->name); 2122 goto re_arm; 2123 } 2124 2125 ad_rx_machine(NULL, port); 2126 ad_periodic_machine(port); 2127 ad_port_selection_logic(port); 2128 ad_mux_machine(port); 2129 ad_tx_machine(port); 2130 2131 // turn off the BEGIN bit, since we already handled it 2132 if (port->sm_vars & AD_PORT_BEGIN) { 2133 port->sm_vars &= ~AD_PORT_BEGIN; 2134 } 2135 } 2136 2137 re_arm: 2138 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2139 out: 2140 read_unlock(&bond->lock); 2141 } 2142 2143 /** 2144 * bond_3ad_rx_indication - handle a received frame 2145 * @lacpdu: received lacpdu 2146 * @slave: slave struct to work on 2147 * @length: length of the data received 2148 * 2149 * It is assumed that frames that were sent on this NIC don't returned as new 2150 * received frames (loopback). Since only the payload is given to this 2151 * function, it check for loopback. 2152 */ 2153 static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) 2154 { 2155 struct port *port; 2156 2157 if (length >= sizeof(struct lacpdu)) { 2158 2159 port = &(SLAVE_AD_INFO(slave).port); 2160 2161 if (!port->slave) { 2162 printk(KERN_WARNING DRV_NAME ": %s: Warning: port of slave %s is " 2163 "uninitialized\n", slave->dev->name, slave->dev->master->name); 2164 return; 2165 } 2166 2167 switch (lacpdu->subtype) { 2168 case AD_TYPE_LACPDU: 2169 pr_debug("Received LACPDU on port %d\n", port->actor_port_number); 2170 ad_rx_machine(lacpdu, port); 2171 break; 2172 2173 case AD_TYPE_MARKER: 2174 // No need to convert fields to Little Endian since we don't use the marker's fields. 2175 2176 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2177 case AD_MARKER_INFORMATION_SUBTYPE: 2178 pr_debug("Received Marker Information on port %d\n", port->actor_port_number); 2179 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2180 break; 2181 2182 case AD_MARKER_RESPONSE_SUBTYPE: 2183 pr_debug("Received Marker Response on port %d\n", port->actor_port_number); 2184 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2185 break; 2186 2187 default: 2188 pr_debug("Received an unknown Marker subtype on slot %d\n", port->actor_port_number); 2189 } 2190 } 2191 } 2192 } 2193 2194 /** 2195 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication 2196 * @slave: slave struct to work on 2197 * 2198 * Handle reselection of aggregator (if needed) for this port. 2199 */ 2200 void bond_3ad_adapter_speed_changed(struct slave *slave) 2201 { 2202 struct port *port; 2203 2204 port = &(SLAVE_AD_INFO(slave).port); 2205 2206 // if slave is null, the whole port is not initialized 2207 if (!port->slave) { 2208 printk(KERN_WARNING DRV_NAME ": Warning: %s: speed " 2209 "changed for uninitialized port on %s\n", 2210 slave->dev->master->name, slave->dev->name); 2211 return; 2212 } 2213 2214 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2215 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); 2216 pr_debug("Port %d changed speed\n", port->actor_port_number); 2217 // there is no need to reselect a new aggregator, just signal the 2218 // state machines to reinitialize 2219 port->sm_vars |= AD_PORT_BEGIN; 2220 } 2221 2222 /** 2223 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication 2224 * @slave: slave struct to work on 2225 * 2226 * Handle reselection of aggregator (if needed) for this port. 2227 */ 2228 void bond_3ad_adapter_duplex_changed(struct slave *slave) 2229 { 2230 struct port *port; 2231 2232 port=&(SLAVE_AD_INFO(slave).port); 2233 2234 // if slave is null, the whole port is not initialized 2235 if (!port->slave) { 2236 printk(KERN_WARNING DRV_NAME ": %s: Warning: duplex changed " 2237 "for uninitialized port on %s\n", 2238 slave->dev->master->name, slave->dev->name); 2239 return; 2240 } 2241 2242 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2243 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); 2244 pr_debug("Port %d changed duplex\n", port->actor_port_number); 2245 // there is no need to reselect a new aggregator, just signal the 2246 // state machines to reinitialize 2247 port->sm_vars |= AD_PORT_BEGIN; 2248 } 2249 2250 /** 2251 * bond_3ad_handle_link_change - handle a slave's link status change indication 2252 * @slave: slave struct to work on 2253 * @status: whether the link is now up or down 2254 * 2255 * Handle reselection of aggregator (if needed) for this port. 2256 */ 2257 void bond_3ad_handle_link_change(struct slave *slave, char link) 2258 { 2259 struct port *port; 2260 2261 port = &(SLAVE_AD_INFO(slave).port); 2262 2263 // if slave is null, the whole port is not initialized 2264 if (!port->slave) { 2265 printk(KERN_WARNING DRV_NAME ": Warning: %s: link status changed for " 2266 "uninitialized port on %s\n", 2267 slave->dev->master->name, slave->dev->name); 2268 return; 2269 } 2270 2271 // 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) 2272 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report 2273 if (link == BOND_LINK_UP) { 2274 port->is_enabled = true; 2275 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2276 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); 2277 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2278 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); 2279 } else { 2280 /* link has failed */ 2281 port->is_enabled = false; 2282 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2283 port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS); 2284 } 2285 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); 2286 // there is no need to reselect a new aggregator, just signal the 2287 // state machines to reinitialize 2288 port->sm_vars |= AD_PORT_BEGIN; 2289 } 2290 2291 /* 2292 * set link state for bonding master: if we have an active 2293 * aggregator, we're up, if not, we're down. Presumes that we cannot 2294 * have an active aggregator if there are no slaves with link up. 2295 * 2296 * This behavior complies with IEEE 802.3 section 43.3.9. 2297 * 2298 * Called by bond_set_carrier(). Return zero if carrier state does not 2299 * change, nonzero if it does. 2300 */ 2301 int bond_3ad_set_carrier(struct bonding *bond) 2302 { 2303 if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) { 2304 if (!netif_carrier_ok(bond->dev)) { 2305 netif_carrier_on(bond->dev); 2306 return 1; 2307 } 2308 return 0; 2309 } 2310 2311 if (netif_carrier_ok(bond->dev)) { 2312 netif_carrier_off(bond->dev); 2313 return 1; 2314 } 2315 return 0; 2316 } 2317 2318 /** 2319 * bond_3ad_get_active_agg_info - get information of the active aggregator 2320 * @bond: bonding struct to work on 2321 * @ad_info: ad_info struct to fill with the bond's info 2322 * 2323 * Returns: 0 on success 2324 * < 0 on error 2325 */ 2326 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2327 { 2328 struct aggregator *aggregator = NULL; 2329 struct port *port; 2330 2331 for (port = __get_first_port(bond); port; port = __get_next_port(port)) { 2332 if (port->aggregator && port->aggregator->is_active) { 2333 aggregator = port->aggregator; 2334 break; 2335 } 2336 } 2337 2338 if (aggregator) { 2339 ad_info->aggregator_id = aggregator->aggregator_identifier; 2340 ad_info->ports = aggregator->num_of_ports; 2341 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2342 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2343 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); 2344 return 0; 2345 } 2346 2347 return -1; 2348 } 2349 2350 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) 2351 { 2352 struct slave *slave, *start_at; 2353 struct bonding *bond = netdev_priv(dev); 2354 int slave_agg_no; 2355 int slaves_in_agg; 2356 int agg_id; 2357 int i; 2358 struct ad_info ad_info; 2359 int res = 1; 2360 2361 /* make sure that the slaves list will 2362 * not change during tx 2363 */ 2364 read_lock(&bond->lock); 2365 2366 if (!BOND_IS_OK(bond)) { 2367 goto out; 2368 } 2369 2370 if (bond_3ad_get_active_agg_info(bond, &ad_info)) { 2371 printk(KERN_DEBUG DRV_NAME ": %s: Error: " 2372 "bond_3ad_get_active_agg_info failed\n", dev->name); 2373 goto out; 2374 } 2375 2376 slaves_in_agg = ad_info.ports; 2377 agg_id = ad_info.aggregator_id; 2378 2379 if (slaves_in_agg == 0) { 2380 /*the aggregator is empty*/ 2381 printk(KERN_DEBUG DRV_NAME ": %s: Error: active " 2382 "aggregator is empty\n", 2383 dev->name); 2384 goto out; 2385 } 2386 2387 slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg); 2388 2389 bond_for_each_slave(bond, slave, i) { 2390 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; 2391 2392 if (agg && (agg->aggregator_identifier == agg_id)) { 2393 slave_agg_no--; 2394 if (slave_agg_no < 0) { 2395 break; 2396 } 2397 } 2398 } 2399 2400 if (slave_agg_no >= 0) { 2401 printk(KERN_ERR DRV_NAME ": %s: Error: Couldn't find a slave to tx on " 2402 "for aggregator ID %d\n", dev->name, agg_id); 2403 goto out; 2404 } 2405 2406 start_at = slave; 2407 2408 bond_for_each_slave_from(bond, slave, i, start_at) { 2409 int slave_agg_id = 0; 2410 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; 2411 2412 if (agg) { 2413 slave_agg_id = agg->aggregator_identifier; 2414 } 2415 2416 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) { 2417 res = bond_dev_queue_xmit(bond, skb, slave->dev); 2418 break; 2419 } 2420 } 2421 2422 out: 2423 if (res) { 2424 /* no suitable interface, frame not sent */ 2425 dev_kfree_skb(skb); 2426 } 2427 read_unlock(&bond->lock); 2428 return 0; 2429 } 2430 2431 int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev) 2432 { 2433 struct bonding *bond = netdev_priv(dev); 2434 struct slave *slave = NULL; 2435 int ret = NET_RX_DROP; 2436 2437 if (dev_net(dev) != &init_net) 2438 goto out; 2439 2440 if (!(dev->flags & IFF_MASTER)) 2441 goto out; 2442 2443 read_lock(&bond->lock); 2444 slave = bond_get_slave_by_dev((struct bonding *)netdev_priv(dev), 2445 orig_dev); 2446 if (!slave) 2447 goto out_unlock; 2448 2449 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len); 2450 2451 ret = NET_RX_SUCCESS; 2452 2453 out_unlock: 2454 read_unlock(&bond->lock); 2455 out: 2456 dev_kfree_skb(skb); 2457 2458 return ret; 2459 } 2460 2461