1 /* 2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License as published by the Free 6 * Software Foundation; either version 2 of the License, or (at your option) 7 * any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 59 16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 * 18 * The full GNU General Public License is included in this distribution in the 19 * file called LICENSE. 20 * 21 */ 22 23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 24 25 #include <linux/skbuff.h> 26 #include <linux/if_ether.h> 27 #include <linux/netdevice.h> 28 #include <linux/spinlock.h> 29 #include <linux/ethtool.h> 30 #include <linux/etherdevice.h> 31 #include <linux/if_bonding.h> 32 #include <linux/pkt_sched.h> 33 #include <net/net_namespace.h> 34 #include "bonding.h" 35 #include "bond_3ad.h" 36 37 // General definitions 38 #define AD_SHORT_TIMEOUT 1 39 #define AD_LONG_TIMEOUT 0 40 #define AD_STANDBY 0x2 41 #define AD_MAX_TX_IN_SECOND 3 42 #define AD_COLLECTOR_MAX_DELAY 0 43 44 // Timer definitions(43.4.4 in the 802.3ad standard) 45 #define AD_FAST_PERIODIC_TIME 1 46 #define AD_SLOW_PERIODIC_TIME 30 47 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) 48 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) 49 #define AD_CHURN_DETECTION_TIME 60 50 #define AD_AGGREGATE_WAIT_TIME 2 51 52 // Port state definitions(43.4.2.2 in the 802.3ad standard) 53 #define AD_STATE_LACP_ACTIVITY 0x1 54 #define AD_STATE_LACP_TIMEOUT 0x2 55 #define AD_STATE_AGGREGATION 0x4 56 #define AD_STATE_SYNCHRONIZATION 0x8 57 #define AD_STATE_COLLECTING 0x10 58 #define AD_STATE_DISTRIBUTING 0x20 59 #define AD_STATE_DEFAULTED 0x40 60 #define AD_STATE_EXPIRED 0x80 61 62 // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard) 63 #define AD_PORT_BEGIN 0x1 64 #define AD_PORT_LACP_ENABLED 0x2 65 #define AD_PORT_ACTOR_CHURN 0x4 66 #define AD_PORT_PARTNER_CHURN 0x8 67 #define AD_PORT_READY 0x10 68 #define AD_PORT_READY_N 0x20 69 #define AD_PORT_MATCHED 0x40 70 #define AD_PORT_STANDBY 0x80 71 #define AD_PORT_SELECTED 0x100 72 #define AD_PORT_MOVED 0x200 73 74 // Port Key definitions 75 // key is determined according to the link speed, duplex and 76 // user key(which is yet not supported) 77 // ------------------------------------------------------------ 78 // Port key : | User key | Speed |Duplex| 79 // ------------------------------------------------------------ 80 // 16 6 1 0 81 #define AD_DUPLEX_KEY_BITS 0x1 82 #define AD_SPEED_KEY_BITS 0x3E 83 #define AD_USER_KEY_BITS 0xFFC0 84 85 //dalloun 86 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 87 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 88 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 89 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 90 #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 91 //endalloun 92 93 // compare MAC addresses 94 #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN) 95 96 static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}}; 97 static u16 ad_ticks_per_sec; 98 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 99 100 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; 101 102 // ================= main 802.3ad protocol functions ================== 103 static int ad_lacpdu_send(struct port *port); 104 static int ad_marker_send(struct port *port, struct bond_marker *marker); 105 static void ad_mux_machine(struct port *port); 106 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 107 static void ad_tx_machine(struct port *port); 108 static void ad_periodic_machine(struct port *port); 109 static void ad_port_selection_logic(struct port *port); 110 static void ad_agg_selection_logic(struct aggregator *aggregator); 111 static void ad_clear_agg(struct aggregator *aggregator); 112 static void ad_initialize_agg(struct aggregator *aggregator); 113 static void ad_initialize_port(struct port *port, int lacp_fast); 114 static void ad_enable_collecting_distributing(struct port *port); 115 static void ad_disable_collecting_distributing(struct port *port); 116 static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port); 117 static void ad_marker_response_received(struct bond_marker *marker, struct port *port); 118 119 120 ///////////////////////////////////////////////////////////////////////////////// 121 // ================= api to bonding and kernel code ================== 122 ///////////////////////////////////////////////////////////////////////////////// 123 124 /** 125 * __get_bond_by_port - get the port's bonding struct 126 * @port: the port we're looking at 127 * 128 * Return @port's bonding struct, or %NULL if it can't be found. 129 */ 130 static inline struct bonding *__get_bond_by_port(struct port *port) 131 { 132 if (port->slave == NULL) { 133 return NULL; 134 } 135 136 return bond_get_bond_by_slave(port->slave); 137 } 138 139 /** 140 * __get_first_port - get the first port in the bond 141 * @bond: the bond we're looking at 142 * 143 * Return the port of the first slave in @bond, or %NULL if it can't be found. 144 */ 145 static inline struct port *__get_first_port(struct bonding *bond) 146 { 147 if (bond->slave_cnt == 0) { 148 return NULL; 149 } 150 151 return &(SLAVE_AD_INFO(bond->first_slave).port); 152 } 153 154 /** 155 * __get_next_port - get the next port in the bond 156 * @port: the port we're looking at 157 * 158 * Return the port of the slave that is next in line of @port's slave in the 159 * bond, or %NULL if it can't be found. 160 */ 161 static inline struct port *__get_next_port(struct port *port) 162 { 163 struct bonding *bond = __get_bond_by_port(port); 164 struct slave *slave = port->slave; 165 166 // If there's no bond for this port, or this is the last slave 167 if ((bond == NULL) || (slave->next == bond->first_slave)) { 168 return NULL; 169 } 170 171 return &(SLAVE_AD_INFO(slave->next).port); 172 } 173 174 /** 175 * __get_first_agg - get the first aggregator in the bond 176 * @bond: the bond we're looking at 177 * 178 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 179 * found. 180 */ 181 static inline struct aggregator *__get_first_agg(struct port *port) 182 { 183 struct bonding *bond = __get_bond_by_port(port); 184 185 // If there's no bond for this port, or bond has no slaves 186 if ((bond == NULL) || (bond->slave_cnt == 0)) { 187 return NULL; 188 } 189 190 return &(SLAVE_AD_INFO(bond->first_slave).aggregator); 191 } 192 193 /** 194 * __get_next_agg - get the next aggregator in the bond 195 * @aggregator: the aggregator we're looking at 196 * 197 * Return the aggregator of the slave that is next in line of @aggregator's 198 * slave in the bond, or %NULL if it can't be found. 199 */ 200 static inline struct aggregator *__get_next_agg(struct aggregator *aggregator) 201 { 202 struct slave *slave = aggregator->slave; 203 struct bonding *bond = bond_get_bond_by_slave(slave); 204 205 // If there's no bond for this aggregator, or this is the last slave 206 if ((bond == NULL) || (slave->next == bond->first_slave)) { 207 return NULL; 208 } 209 210 return &(SLAVE_AD_INFO(slave->next).aggregator); 211 } 212 213 /* 214 * __agg_has_partner 215 * 216 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 217 * address for the partner). Return 0 if not. 218 */ 219 static inline int __agg_has_partner(struct aggregator *agg) 220 { 221 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 222 } 223 224 /** 225 * __disable_port - disable the port's slave 226 * @port: the port we're looking at 227 * 228 */ 229 static inline void __disable_port(struct port *port) 230 { 231 bond_set_slave_inactive_flags(port->slave); 232 } 233 234 /** 235 * __enable_port - enable the port's slave, if it's up 236 * @port: the port we're looking at 237 * 238 */ 239 static inline void __enable_port(struct port *port) 240 { 241 struct slave *slave = port->slave; 242 243 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) { 244 bond_set_slave_active_flags(slave); 245 } 246 } 247 248 /** 249 * __port_is_enabled - check if the port's slave is in active state 250 * @port: the port we're looking at 251 * 252 */ 253 static inline int __port_is_enabled(struct port *port) 254 { 255 return(port->slave->state == BOND_STATE_ACTIVE); 256 } 257 258 /** 259 * __get_agg_selection_mode - get the aggregator selection mode 260 * @port: the port we're looking at 261 * 262 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 263 */ 264 static inline u32 __get_agg_selection_mode(struct port *port) 265 { 266 struct bonding *bond = __get_bond_by_port(port); 267 268 if (bond == NULL) { 269 return BOND_AD_STABLE; 270 } 271 272 return BOND_AD_INFO(bond).agg_select_mode; 273 } 274 275 /** 276 * __check_agg_selection_timer - check if the selection timer has expired 277 * @port: the port we're looking at 278 * 279 */ 280 static inline int __check_agg_selection_timer(struct port *port) 281 { 282 struct bonding *bond = __get_bond_by_port(port); 283 284 if (bond == NULL) { 285 return 0; 286 } 287 288 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 289 } 290 291 /** 292 * __get_rx_machine_lock - lock the port's RX machine 293 * @port: the port we're looking at 294 * 295 */ 296 static inline void __get_rx_machine_lock(struct port *port) 297 { 298 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 299 } 300 301 /** 302 * __release_rx_machine_lock - unlock the port's RX machine 303 * @port: the port we're looking at 304 * 305 */ 306 static inline void __release_rx_machine_lock(struct port *port) 307 { 308 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 309 } 310 311 /** 312 * __get_link_speed - get a port's speed 313 * @port: the port we're looking at 314 * 315 * Return @port's speed in 802.3ad bitmask format. i.e. one of: 316 * 0, 317 * %AD_LINK_SPEED_BITMASK_10MBPS, 318 * %AD_LINK_SPEED_BITMASK_100MBPS, 319 * %AD_LINK_SPEED_BITMASK_1000MBPS, 320 * %AD_LINK_SPEED_BITMASK_10000MBPS 321 */ 322 static u16 __get_link_speed(struct port *port) 323 { 324 struct slave *slave = port->slave; 325 u16 speed; 326 327 /* this if covers only a special case: when the configuration starts with 328 * link down, it sets the speed to 0. 329 * This is done in spite of the fact that the e100 driver reports 0 to be 330 * compatible with MVT in the future.*/ 331 if (slave->link != BOND_LINK_UP) { 332 speed=0; 333 } else { 334 switch (slave->speed) { 335 case SPEED_10: 336 speed = AD_LINK_SPEED_BITMASK_10MBPS; 337 break; 338 339 case SPEED_100: 340 speed = AD_LINK_SPEED_BITMASK_100MBPS; 341 break; 342 343 case SPEED_1000: 344 speed = AD_LINK_SPEED_BITMASK_1000MBPS; 345 break; 346 347 case SPEED_10000: 348 speed = AD_LINK_SPEED_BITMASK_10000MBPS; 349 break; 350 351 default: 352 speed = 0; // unknown speed value from ethtool. shouldn't happen 353 break; 354 } 355 } 356 357 pr_debug("Port %d Received link speed %d update from adapter\n", 358 port->actor_port_number, speed); 359 return speed; 360 } 361 362 /** 363 * __get_duplex - get a port's duplex 364 * @port: the port we're looking at 365 * 366 * Return @port's duplex in 802.3ad bitmask format. i.e.: 367 * 0x01 if in full duplex 368 * 0x00 otherwise 369 */ 370 static u8 __get_duplex(struct port *port) 371 { 372 struct slave *slave = port->slave; 373 374 u8 retval; 375 376 // handling a special case: when the configuration starts with 377 // link down, it sets the duplex to 0. 378 if (slave->link != BOND_LINK_UP) { 379 retval=0x0; 380 } else { 381 switch (slave->duplex) { 382 case DUPLEX_FULL: 383 retval=0x1; 384 pr_debug("Port %d Received status full duplex update from adapter\n", 385 port->actor_port_number); 386 break; 387 case DUPLEX_HALF: 388 default: 389 retval=0x0; 390 pr_debug("Port %d Received status NOT full duplex update from adapter\n", 391 port->actor_port_number); 392 break; 393 } 394 } 395 return retval; 396 } 397 398 /** 399 * __initialize_port_locks - initialize a port's RX machine spinlock 400 * @port: the port we're looking at 401 * 402 */ 403 static inline void __initialize_port_locks(struct port *port) 404 { 405 // make sure it isn't called twice 406 spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); 407 } 408 409 //conversions 410 411 /** 412 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 413 * @timer_type: which timer to operate 414 * @par: timer parameter. see below 415 * 416 * If @timer_type is %current_while_timer, @par indicates long/short timer. 417 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 418 * %SLOW_PERIODIC_TIME. 419 */ 420 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 421 { 422 u16 retval=0; //to silence the compiler 423 424 switch (timer_type) { 425 case AD_CURRENT_WHILE_TIMER: // for rx machine usage 426 if (par) { // for short or long timeout 427 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout 428 } else { 429 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout 430 } 431 break; 432 case AD_ACTOR_CHURN_TIMER: // for local churn machine 433 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 434 break; 435 case AD_PERIODIC_TIMER: // for periodic machine 436 retval = (par*ad_ticks_per_sec); // long timeout 437 break; 438 case AD_PARTNER_CHURN_TIMER: // for remote churn machine 439 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 440 break; 441 case AD_WAIT_WHILE_TIMER: // for selection machine 442 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 443 break; 444 } 445 return retval; 446 } 447 448 449 ///////////////////////////////////////////////////////////////////////////////// 450 // ================= ad_rx_machine helper functions ================== 451 ///////////////////////////////////////////////////////////////////////////////// 452 453 /** 454 * __choose_matched - update a port's matched variable from a received lacpdu 455 * @lacpdu: the lacpdu we've received 456 * @port: the port we're looking at 457 * 458 * Update the value of the matched variable, using parameter values from a 459 * newly received lacpdu. Parameter values for the partner carried in the 460 * received PDU are compared with the corresponding operational parameter 461 * values for the actor. Matched is set to TRUE if all of these parameters 462 * match and the PDU parameter partner_state.aggregation has the same value as 463 * actor_oper_port_state.aggregation and lacp will actively maintain the link 464 * in the aggregation. Matched is also set to TRUE if the value of 465 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 466 * an individual link and lacp will actively maintain the link. Otherwise, 467 * matched is set to FALSE. LACP is considered to be actively maintaining the 468 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 469 * the actor's actor_oper_port_state.lacp_activity and the PDU's 470 * partner_state.lacp_activity variables are TRUE. 471 * 472 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 473 * used here to implement the language from 802.3ad 43.4.9 that requires 474 * recordPDU to "match" the LACPDU parameters to the stored values. 475 */ 476 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 477 { 478 // check if all parameters are alike 479 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 480 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 481 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && 482 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 483 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 484 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 485 // or this is individual link(aggregation == FALSE) 486 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 487 ) { 488 // update the state machine Matched variable 489 port->sm_vars |= AD_PORT_MATCHED; 490 } else { 491 port->sm_vars &= ~AD_PORT_MATCHED; 492 } 493 } 494 495 /** 496 * __record_pdu - record parameters from a received lacpdu 497 * @lacpdu: the lacpdu we've received 498 * @port: the port we're looking at 499 * 500 * Record the parameter values for the Actor carried in a received lacpdu as 501 * the current partner operational parameter values and sets 502 * actor_oper_port_state.defaulted to FALSE. 503 */ 504 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 505 { 506 if (lacpdu && port) { 507 struct port_params *partner = &port->partner_oper; 508 509 __choose_matched(lacpdu, port); 510 // record the new parameter values for the partner operational 511 partner->port_number = ntohs(lacpdu->actor_port); 512 partner->port_priority = ntohs(lacpdu->actor_port_priority); 513 partner->system = lacpdu->actor_system; 514 partner->system_priority = ntohs(lacpdu->actor_system_priority); 515 partner->key = ntohs(lacpdu->actor_key); 516 partner->port_state = lacpdu->actor_state; 517 518 // set actor_oper_port_state.defaulted to FALSE 519 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 520 521 // set the partner sync. to on if the partner is sync. and the port is matched 522 if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 523 partner->port_state |= AD_STATE_SYNCHRONIZATION; 524 } else { 525 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 526 } 527 } 528 } 529 530 /** 531 * __record_default - record default parameters 532 * @port: the port we're looking at 533 * 534 * This function records the default parameter values for the partner carried 535 * in the Partner Admin parameters as the current partner operational parameter 536 * values and sets actor_oper_port_state.defaulted to TRUE. 537 */ 538 static void __record_default(struct port *port) 539 { 540 if (port) { 541 // record the partner admin parameters 542 memcpy(&port->partner_oper, &port->partner_admin, 543 sizeof(struct port_params)); 544 545 // set actor_oper_port_state.defaulted to true 546 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 547 } 548 } 549 550 /** 551 * __update_selected - update a port's Selected variable from a received lacpdu 552 * @lacpdu: the lacpdu we've received 553 * @port: the port we're looking at 554 * 555 * Update the value of the selected variable, using parameter values from a 556 * newly received lacpdu. The parameter values for the Actor carried in the 557 * received PDU are compared with the corresponding operational parameter 558 * values for the ports partner. If one or more of the comparisons shows that 559 * the value(s) received in the PDU differ from the current operational values, 560 * then selected is set to FALSE and actor_oper_port_state.synchronization is 561 * set to out_of_sync. Otherwise, selected remains unchanged. 562 */ 563 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 564 { 565 if (lacpdu && port) { 566 const struct port_params *partner = &port->partner_oper; 567 568 // check if any parameter is different 569 if (ntohs(lacpdu->actor_port) != partner->port_number || 570 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 571 MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) || 572 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 573 ntohs(lacpdu->actor_key) != partner->key || 574 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 575 // update the state machine Selected variable 576 port->sm_vars &= ~AD_PORT_SELECTED; 577 } 578 } 579 } 580 581 /** 582 * __update_default_selected - update a port's Selected variable from Partner 583 * @port: the port we're looking at 584 * 585 * This function updates the value of the selected variable, using the partner 586 * administrative parameter values. The administrative values are compared with 587 * the corresponding operational parameter values for the partner. If one or 588 * more of the comparisons shows that the administrative value(s) differ from 589 * the current operational values, then Selected is set to FALSE and 590 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 591 * Selected remains unchanged. 592 */ 593 static void __update_default_selected(struct port *port) 594 { 595 if (port) { 596 const struct port_params *admin = &port->partner_admin; 597 const struct port_params *oper = &port->partner_oper; 598 599 // check if any parameter is different 600 if (admin->port_number != oper->port_number || 601 admin->port_priority != oper->port_priority || 602 MAC_ADDRESS_COMPARE(&admin->system, &oper->system) || 603 admin->system_priority != oper->system_priority || 604 admin->key != oper->key || 605 (admin->port_state & AD_STATE_AGGREGATION) 606 != (oper->port_state & AD_STATE_AGGREGATION)) { 607 // update the state machine Selected variable 608 port->sm_vars &= ~AD_PORT_SELECTED; 609 } 610 } 611 } 612 613 /** 614 * __update_ntt - update a port's ntt variable from a received lacpdu 615 * @lacpdu: the lacpdu we've received 616 * @port: the port we're looking at 617 * 618 * Updates the value of the ntt variable, using parameter values from a newly 619 * received lacpdu. The parameter values for the partner carried in the 620 * received PDU are compared with the corresponding operational parameter 621 * values for the Actor. If one or more of the comparisons shows that the 622 * value(s) received in the PDU differ from the current operational values, 623 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 624 */ 625 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 626 { 627 // validate lacpdu and port 628 if (lacpdu && port) { 629 // check if any parameter is different 630 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 631 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 632 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || 633 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 634 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 635 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 636 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 637 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 638 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 639 ) { 640 641 port->ntt = true; 642 } 643 } 644 } 645 646 /** 647 * __attach_bond_to_agg 648 * @port: the port we're looking at 649 * 650 * Handle the attaching of the port's control parser/multiplexer and the 651 * aggregator. This function does nothing since the parser/multiplexer of the 652 * receive and the parser/multiplexer of the aggregator are already combined. 653 */ 654 static void __attach_bond_to_agg(struct port *port) 655 { 656 port=NULL; // just to satisfy the compiler 657 // This function does nothing since the parser/multiplexer of the receive 658 // and the parser/multiplexer of the aggregator are already combined 659 } 660 661 /** 662 * __detach_bond_from_agg 663 * @port: the port we're looking at 664 * 665 * Handle the detaching of the port's control parser/multiplexer from the 666 * aggregator. This function does nothing since the parser/multiplexer of the 667 * receive and the parser/multiplexer of the aggregator are already combined. 668 */ 669 static void __detach_bond_from_agg(struct port *port) 670 { 671 port=NULL; // just to satisfy the compiler 672 // This function does nothing sience the parser/multiplexer of the receive 673 // and the parser/multiplexer of the aggregator are already combined 674 } 675 676 /** 677 * __agg_ports_are_ready - check if all ports in an aggregator are ready 678 * @aggregator: the aggregator we're looking at 679 * 680 */ 681 static int __agg_ports_are_ready(struct aggregator *aggregator) 682 { 683 struct port *port; 684 int retval = 1; 685 686 if (aggregator) { 687 // scan all ports in this aggregator to verfy if they are all ready 688 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 689 if (!(port->sm_vars & AD_PORT_READY_N)) { 690 retval = 0; 691 break; 692 } 693 } 694 } 695 696 return retval; 697 } 698 699 /** 700 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 701 * @aggregator: the aggregator we're looking at 702 * @val: Should the ports' ready bit be set on or off 703 * 704 */ 705 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 706 { 707 struct port *port; 708 709 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { 710 if (val) { 711 port->sm_vars |= AD_PORT_READY; 712 } else { 713 port->sm_vars &= ~AD_PORT_READY; 714 } 715 } 716 } 717 718 /** 719 * __get_agg_bandwidth - get the total bandwidth of an aggregator 720 * @aggregator: the aggregator we're looking at 721 * 722 */ 723 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 724 { 725 u32 bandwidth=0; 726 u32 basic_speed; 727 728 if (aggregator->num_of_ports) { 729 basic_speed = __get_link_speed(aggregator->lag_ports); 730 switch (basic_speed) { 731 case AD_LINK_SPEED_BITMASK_1MBPS: 732 bandwidth = aggregator->num_of_ports; 733 break; 734 case AD_LINK_SPEED_BITMASK_10MBPS: 735 bandwidth = aggregator->num_of_ports * 10; 736 break; 737 case AD_LINK_SPEED_BITMASK_100MBPS: 738 bandwidth = aggregator->num_of_ports * 100; 739 break; 740 case AD_LINK_SPEED_BITMASK_1000MBPS: 741 bandwidth = aggregator->num_of_ports * 1000; 742 break; 743 case AD_LINK_SPEED_BITMASK_10000MBPS: 744 bandwidth = aggregator->num_of_ports * 10000; 745 break; 746 default: 747 bandwidth=0; // to silent the compilor .... 748 } 749 } 750 return bandwidth; 751 } 752 753 /** 754 * __get_active_agg - get the current active aggregator 755 * @aggregator: the aggregator we're looking at 756 * 757 */ 758 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 759 { 760 struct aggregator *retval = NULL; 761 762 for (; aggregator; aggregator = __get_next_agg(aggregator)) { 763 if (aggregator->is_active) { 764 retval = aggregator; 765 break; 766 } 767 } 768 769 return retval; 770 } 771 772 /** 773 * __update_lacpdu_from_port - update a port's lacpdu fields 774 * @port: the port we're looking at 775 * 776 */ 777 static inline void __update_lacpdu_from_port(struct port *port) 778 { 779 struct lacpdu *lacpdu = &port->lacpdu; 780 const struct port_params *partner = &port->partner_oper; 781 782 /* update current actual Actor parameters */ 783 /* lacpdu->subtype initialized 784 * lacpdu->version_number initialized 785 * lacpdu->tlv_type_actor_info initialized 786 * lacpdu->actor_information_length initialized 787 */ 788 789 lacpdu->actor_system_priority = htons(port->actor_system_priority); 790 lacpdu->actor_system = port->actor_system; 791 lacpdu->actor_key = htons(port->actor_oper_port_key); 792 lacpdu->actor_port_priority = htons(port->actor_port_priority); 793 lacpdu->actor_port = htons(port->actor_port_number); 794 lacpdu->actor_state = port->actor_oper_port_state; 795 796 /* lacpdu->reserved_3_1 initialized 797 * lacpdu->tlv_type_partner_info initialized 798 * lacpdu->partner_information_length initialized 799 */ 800 801 lacpdu->partner_system_priority = htons(partner->system_priority); 802 lacpdu->partner_system = partner->system; 803 lacpdu->partner_key = htons(partner->key); 804 lacpdu->partner_port_priority = htons(partner->port_priority); 805 lacpdu->partner_port = htons(partner->port_number); 806 lacpdu->partner_state = partner->port_state; 807 808 /* lacpdu->reserved_3_2 initialized 809 * lacpdu->tlv_type_collector_info initialized 810 * lacpdu->collector_information_length initialized 811 * collector_max_delay initialized 812 * reserved_12[12] initialized 813 * tlv_type_terminator initialized 814 * terminator_length initialized 815 * reserved_50[50] initialized 816 */ 817 } 818 819 ////////////////////////////////////////////////////////////////////////////////////// 820 // ================= main 802.3ad protocol code ====================================== 821 ////////////////////////////////////////////////////////////////////////////////////// 822 823 /** 824 * ad_lacpdu_send - send out a lacpdu packet on a given port 825 * @port: the port we're looking at 826 * 827 * Returns: 0 on success 828 * < 0 on error 829 */ 830 static int ad_lacpdu_send(struct port *port) 831 { 832 struct slave *slave = port->slave; 833 struct sk_buff *skb; 834 struct lacpdu_header *lacpdu_header; 835 int length = sizeof(struct lacpdu_header); 836 837 skb = dev_alloc_skb(length); 838 if (!skb) { 839 return -ENOMEM; 840 } 841 842 skb->dev = slave->dev; 843 skb_reset_mac_header(skb); 844 skb->network_header = skb->mac_header + ETH_HLEN; 845 skb->protocol = PKT_TYPE_LACPDU; 846 skb->priority = TC_PRIO_CONTROL; 847 848 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 849 850 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); 851 /* Note: source addres is set to be the member's PERMANENT address, 852 because we use it to identify loopback lacpdus in receive. */ 853 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); 854 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 855 856 lacpdu_header->lacpdu = port->lacpdu; // struct copy 857 858 dev_queue_xmit(skb); 859 860 return 0; 861 } 862 863 /** 864 * ad_marker_send - send marker information/response on a given port 865 * @port: the port we're looking at 866 * @marker: marker data to send 867 * 868 * Returns: 0 on success 869 * < 0 on error 870 */ 871 static int ad_marker_send(struct port *port, struct bond_marker *marker) 872 { 873 struct slave *slave = port->slave; 874 struct sk_buff *skb; 875 struct bond_marker_header *marker_header; 876 int length = sizeof(struct bond_marker_header); 877 878 skb = dev_alloc_skb(length + 16); 879 if (!skb) { 880 return -ENOMEM; 881 } 882 883 skb_reserve(skb, 16); 884 885 skb->dev = slave->dev; 886 skb_reset_mac_header(skb); 887 skb->network_header = skb->mac_header + ETH_HLEN; 888 skb->protocol = PKT_TYPE_LACPDU; 889 890 marker_header = (struct bond_marker_header *)skb_put(skb, length); 891 892 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); 893 /* Note: source addres is set to be the member's PERMANENT address, 894 because we use it to identify loopback MARKERs in receive. */ 895 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); 896 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 897 898 marker_header->marker = *marker; // struct copy 899 900 dev_queue_xmit(skb); 901 902 return 0; 903 } 904 905 /** 906 * ad_mux_machine - handle a port's mux state machine 907 * @port: the port we're looking at 908 * 909 */ 910 static void ad_mux_machine(struct port *port) 911 { 912 mux_states_t last_state; 913 914 // keep current State Machine state to compare later if it was changed 915 last_state = port->sm_mux_state; 916 917 if (port->sm_vars & AD_PORT_BEGIN) { 918 port->sm_mux_state = AD_MUX_DETACHED; // next state 919 } else { 920 switch (port->sm_mux_state) { 921 case AD_MUX_DETACHED: 922 if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY 923 port->sm_mux_state = AD_MUX_WAITING; // next state 924 } 925 break; 926 case AD_MUX_WAITING: 927 // if SELECTED == FALSE return to DETACH state 928 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED 929 port->sm_vars &= ~AD_PORT_READY_N; 930 // in order to withhold the Selection Logic to check all ports READY_N value 931 // every callback cycle to update ready variable, we check READY_N and update READY here 932 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 933 port->sm_mux_state = AD_MUX_DETACHED; // next state 934 break; 935 } 936 937 // check if the wait_while_timer expired 938 if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) { 939 port->sm_vars |= AD_PORT_READY_N; 940 } 941 942 // in order to withhold the selection logic to check all ports READY_N value 943 // every callback cycle to update ready variable, we check READY_N and update READY here 944 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 945 946 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state 947 if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) { 948 port->sm_mux_state = AD_MUX_ATTACHED; // next state 949 } 950 break; 951 case AD_MUX_ATTACHED: 952 // check also if agg_select_timer expired(so the edable port will take place only after this timer) 953 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { 954 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state 955 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY 956 port->sm_vars &= ~AD_PORT_READY_N; 957 // in order to withhold the selection logic to check all ports READY_N value 958 // every callback cycle to update ready variable, we check READY_N and update READY here 959 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 960 port->sm_mux_state = AD_MUX_DETACHED;// next state 961 } 962 break; 963 case AD_MUX_COLLECTING_DISTRIBUTING: 964 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || 965 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) 966 ) { 967 port->sm_mux_state = AD_MUX_ATTACHED;// next state 968 969 } else { 970 // if port state hasn't changed make 971 // sure that a collecting distributing 972 // port in an active aggregator is enabled 973 if (port->aggregator && 974 port->aggregator->is_active && 975 !__port_is_enabled(port)) { 976 977 __enable_port(port); 978 } 979 } 980 break; 981 default: //to silence the compiler 982 break; 983 } 984 } 985 986 // check if the state machine was changed 987 if (port->sm_mux_state != last_state) { 988 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", 989 port->actor_port_number, last_state, 990 port->sm_mux_state); 991 switch (port->sm_mux_state) { 992 case AD_MUX_DETACHED: 993 __detach_bond_from_agg(port); 994 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 995 ad_disable_collecting_distributing(port); 996 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 997 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 998 port->ntt = true; 999 break; 1000 case AD_MUX_WAITING: 1001 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1002 break; 1003 case AD_MUX_ATTACHED: 1004 __attach_bond_to_agg(port); 1005 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 1006 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1007 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1008 ad_disable_collecting_distributing(port); 1009 port->ntt = true; 1010 break; 1011 case AD_MUX_COLLECTING_DISTRIBUTING: 1012 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1013 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1014 ad_enable_collecting_distributing(port); 1015 port->ntt = true; 1016 break; 1017 default: //to silence the compiler 1018 break; 1019 } 1020 } 1021 } 1022 1023 /** 1024 * ad_rx_machine - handle a port's rx State Machine 1025 * @lacpdu: the lacpdu we've received 1026 * @port: the port we're looking at 1027 * 1028 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1029 * CURRENT. If timer expired set the state machine in the proper state. 1030 * In other cases, this function checks if we need to switch to other state. 1031 */ 1032 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1033 { 1034 rx_states_t last_state; 1035 1036 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback) 1037 __get_rx_machine_lock(port); 1038 1039 // keep current State Machine state to compare later if it was changed 1040 last_state = port->sm_rx_state; 1041 1042 // check if state machine should change state 1043 // first, check if port was reinitialized 1044 if (port->sm_vars & AD_PORT_BEGIN) { 1045 port->sm_rx_state = AD_RX_INITIALIZE; // next state 1046 } 1047 // check if port is not enabled 1048 else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) { 1049 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state 1050 } 1051 // check if new lacpdu arrived 1052 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { 1053 port->sm_rx_timer_counter = 0; // zero timer 1054 port->sm_rx_state = AD_RX_CURRENT; 1055 } else { 1056 // if timer is on, and if it is expired 1057 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { 1058 switch (port->sm_rx_state) { 1059 case AD_RX_EXPIRED: 1060 port->sm_rx_state = AD_RX_DEFAULTED; // next state 1061 break; 1062 case AD_RX_CURRENT: 1063 port->sm_rx_state = AD_RX_EXPIRED; // next state 1064 break; 1065 default: //to silence the compiler 1066 break; 1067 } 1068 } else { 1069 // if no lacpdu arrived and no timer is on 1070 switch (port->sm_rx_state) { 1071 case AD_RX_PORT_DISABLED: 1072 if (port->sm_vars & AD_PORT_MOVED) { 1073 port->sm_rx_state = AD_RX_INITIALIZE; // next state 1074 } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1075 port->sm_rx_state = AD_RX_EXPIRED; // next state 1076 } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) { 1077 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state 1078 } 1079 break; 1080 default: //to silence the compiler 1081 break; 1082 1083 } 1084 } 1085 } 1086 1087 // check if the State machine was changed or new lacpdu arrived 1088 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1089 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", 1090 port->actor_port_number, last_state, 1091 port->sm_rx_state); 1092 switch (port->sm_rx_state) { 1093 case AD_RX_INITIALIZE: 1094 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { 1095 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1096 } else { 1097 port->sm_vars |= AD_PORT_LACP_ENABLED; 1098 } 1099 port->sm_vars &= ~AD_PORT_SELECTED; 1100 __record_default(port); 1101 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1102 port->sm_vars &= ~AD_PORT_MOVED; 1103 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state 1104 1105 /*- Fall Through -*/ 1106 1107 case AD_RX_PORT_DISABLED: 1108 port->sm_vars &= ~AD_PORT_MATCHED; 1109 break; 1110 case AD_RX_LACP_DISABLED: 1111 port->sm_vars &= ~AD_PORT_SELECTED; 1112 __record_default(port); 1113 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1114 port->sm_vars |= AD_PORT_MATCHED; 1115 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1116 break; 1117 case AD_RX_EXPIRED: 1118 //Reset of the Synchronization flag. (Standard 43.4.12) 1119 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the 1120 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. 1121 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1122 port->sm_vars &= ~AD_PORT_MATCHED; 1123 port->partner_oper.port_state |= 1124 AD_STATE_LACP_ACTIVITY; 1125 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1126 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1127 break; 1128 case AD_RX_DEFAULTED: 1129 __update_default_selected(port); 1130 __record_default(port); 1131 port->sm_vars |= AD_PORT_MATCHED; 1132 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1133 break; 1134 case AD_RX_CURRENT: 1135 // detect loopback situation 1136 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { 1137 // INFO_RECEIVED_LOOPBACK_FRAMES 1138 pr_err("%s: An illegal loopback occurred on adapter (%s).\n" 1139 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1140 port->slave->dev->master->name, port->slave->dev->name); 1141 __release_rx_machine_lock(port); 1142 return; 1143 } 1144 __update_selected(lacpdu, port); 1145 __update_ntt(lacpdu, port); 1146 __record_pdu(lacpdu, port); 1147 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1148 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1149 // verify that if the aggregator is enabled, the port is enabled too. 1150 //(because if the link goes down for a short time, the 802.3ad will not 1151 // catch it, and the port will continue to be disabled) 1152 if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) { 1153 __enable_port(port); 1154 } 1155 break; 1156 default: //to silence the compiler 1157 break; 1158 } 1159 } 1160 __release_rx_machine_lock(port); 1161 } 1162 1163 /** 1164 * ad_tx_machine - handle a port's tx state machine 1165 * @port: the port we're looking at 1166 * 1167 */ 1168 static void ad_tx_machine(struct port *port) 1169 { 1170 // check if tx timer expired, to verify that we do not send more than 3 packets per second 1171 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1172 // check if there is something to send 1173 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1174 __update_lacpdu_from_port(port); 1175 1176 if (ad_lacpdu_send(port) >= 0) { 1177 pr_debug("Sent LACPDU on port %d\n", 1178 port->actor_port_number); 1179 1180 /* mark ntt as false, so it will not be sent again until 1181 demanded */ 1182 port->ntt = false; 1183 } 1184 } 1185 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND 1186 port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1187 } 1188 } 1189 1190 /** 1191 * ad_periodic_machine - handle a port's periodic state machine 1192 * @port: the port we're looking at 1193 * 1194 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1195 */ 1196 static void ad_periodic_machine(struct port *port) 1197 { 1198 periodic_states_t last_state; 1199 1200 // keep current state machine state to compare later if it was changed 1201 last_state = port->sm_periodic_state; 1202 1203 // check if port was reinitialized 1204 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1205 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1206 ) { 1207 port->sm_periodic_state = AD_NO_PERIODIC; // next state 1208 } 1209 // check if state machine should change state 1210 else if (port->sm_periodic_timer_counter) { 1211 // check if periodic state machine expired 1212 if (!(--port->sm_periodic_timer_counter)) { 1213 // if expired then do tx 1214 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1215 } else { 1216 // If not expired, check if there is some new timeout parameter from the partner state 1217 switch (port->sm_periodic_state) { 1218 case AD_FAST_PERIODIC: 1219 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1220 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1221 } 1222 break; 1223 case AD_SLOW_PERIODIC: 1224 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1225 // stop current timer 1226 port->sm_periodic_timer_counter = 0; 1227 port->sm_periodic_state = AD_PERIODIC_TX; // next state 1228 } 1229 break; 1230 default: //to silence the compiler 1231 break; 1232 } 1233 } 1234 } else { 1235 switch (port->sm_periodic_state) { 1236 case AD_NO_PERIODIC: 1237 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1238 break; 1239 case AD_PERIODIC_TX: 1240 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1241 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state 1242 } else { 1243 port->sm_periodic_state = AD_FAST_PERIODIC; // next state 1244 } 1245 break; 1246 default: //to silence the compiler 1247 break; 1248 } 1249 } 1250 1251 // check if the state machine was changed 1252 if (port->sm_periodic_state != last_state) { 1253 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1254 port->actor_port_number, last_state, 1255 port->sm_periodic_state); 1256 switch (port->sm_periodic_state) { 1257 case AD_NO_PERIODIC: 1258 port->sm_periodic_timer_counter = 0; // zero timer 1259 break; 1260 case AD_FAST_PERIODIC: 1261 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 1262 break; 1263 case AD_SLOW_PERIODIC: 1264 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 1265 break; 1266 case AD_PERIODIC_TX: 1267 port->ntt = true; 1268 break; 1269 default: //to silence the compiler 1270 break; 1271 } 1272 } 1273 } 1274 1275 /** 1276 * ad_port_selection_logic - select aggregation groups 1277 * @port: the port we're looking at 1278 * 1279 * Select aggregation groups, and assign each port for it's aggregetor. The 1280 * selection logic is called in the inititalization (after all the handshkes), 1281 * and after every lacpdu receive (if selected is off). 1282 */ 1283 static void ad_port_selection_logic(struct port *port) 1284 { 1285 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1286 struct port *last_port = NULL, *curr_port; 1287 int found = 0; 1288 1289 // if the port is already Selected, do nothing 1290 if (port->sm_vars & AD_PORT_SELECTED) { 1291 return; 1292 } 1293 1294 // if the port is connected to other aggregator, detach it 1295 if (port->aggregator) { 1296 // detach the port from its former aggregator 1297 temp_aggregator=port->aggregator; 1298 for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) { 1299 if (curr_port == port) { 1300 temp_aggregator->num_of_ports--; 1301 if (!last_port) {// if it is the first port attached to the aggregator 1302 temp_aggregator->lag_ports=port->next_port_in_aggregator; 1303 } else {// not the first port attached to the aggregator 1304 last_port->next_port_in_aggregator=port->next_port_in_aggregator; 1305 } 1306 1307 // clear the port's relations to this aggregator 1308 port->aggregator = NULL; 1309 port->next_port_in_aggregator=NULL; 1310 port->actor_port_aggregator_identifier=0; 1311 1312 pr_debug("Port %d left LAG %d\n", 1313 port->actor_port_number, 1314 temp_aggregator->aggregator_identifier); 1315 // if the aggregator is empty, clear its parameters, and set it ready to be attached 1316 if (!temp_aggregator->lag_ports) { 1317 ad_clear_agg(temp_aggregator); 1318 } 1319 break; 1320 } 1321 } 1322 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list 1323 pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1324 port->slave->dev->master->name, 1325 port->actor_port_number, 1326 port->slave->dev->name, 1327 port->aggregator->aggregator_identifier); 1328 } 1329 } 1330 // search on all aggregators for a suitable aggregator for this port 1331 for (aggregator = __get_first_agg(port); aggregator; 1332 aggregator = __get_next_agg(aggregator)) { 1333 1334 // keep a free aggregator for later use(if needed) 1335 if (!aggregator->lag_ports) { 1336 if (!free_aggregator) { 1337 free_aggregator=aggregator; 1338 } 1339 continue; 1340 } 1341 // check if current aggregator suits us 1342 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND 1343 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) && 1344 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1345 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1346 ) && 1347 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers 1348 !aggregator->is_individual) // but is not individual OR 1349 ) 1350 ) { 1351 // attach to the founded aggregator 1352 port->aggregator = aggregator; 1353 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; 1354 port->next_port_in_aggregator=aggregator->lag_ports; 1355 port->aggregator->num_of_ports++; 1356 aggregator->lag_ports=port; 1357 pr_debug("Port %d joined LAG %d(existing LAG)\n", 1358 port->actor_port_number, 1359 port->aggregator->aggregator_identifier); 1360 1361 // mark this port as selected 1362 port->sm_vars |= AD_PORT_SELECTED; 1363 found = 1; 1364 break; 1365 } 1366 } 1367 1368 // the port couldn't find an aggregator - attach it to a new aggregator 1369 if (!found) { 1370 if (free_aggregator) { 1371 // assign port a new aggregator 1372 port->aggregator = free_aggregator; 1373 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; 1374 1375 // update the new aggregator's parameters 1376 // if port was responsed from the end-user 1377 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex 1378 port->aggregator->is_individual = false; 1379 } else { 1380 port->aggregator->is_individual = true; 1381 } 1382 1383 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; 1384 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; 1385 port->aggregator->partner_system=port->partner_oper.system; 1386 port->aggregator->partner_system_priority = port->partner_oper.system_priority; 1387 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1388 port->aggregator->receive_state = 1; 1389 port->aggregator->transmit_state = 1; 1390 port->aggregator->lag_ports = port; 1391 port->aggregator->num_of_ports++; 1392 1393 // mark this port as selected 1394 port->sm_vars |= AD_PORT_SELECTED; 1395 1396 pr_debug("Port %d joined LAG %d(new LAG)\n", 1397 port->actor_port_number, 1398 port->aggregator->aggregator_identifier); 1399 } else { 1400 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n", 1401 port->slave->dev->master->name, 1402 port->actor_port_number, port->slave->dev->name); 1403 } 1404 } 1405 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports 1406 // else set ready=FALSE in all aggregator's ports 1407 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1408 1409 aggregator = __get_first_agg(port); 1410 ad_agg_selection_logic(aggregator); 1411 } 1412 1413 /* 1414 * Decide if "agg" is a better choice for the new active aggregator that 1415 * the current best, according to the ad_select policy. 1416 */ 1417 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1418 struct aggregator *curr) 1419 { 1420 /* 1421 * 0. If no best, select current. 1422 * 1423 * 1. If the current agg is not individual, and the best is 1424 * individual, select current. 1425 * 1426 * 2. If current agg is individual and the best is not, keep best. 1427 * 1428 * 3. Therefore, current and best are both individual or both not 1429 * individual, so: 1430 * 1431 * 3a. If current agg partner replied, and best agg partner did not, 1432 * select current. 1433 * 1434 * 3b. If current agg partner did not reply and best agg partner 1435 * did reply, keep best. 1436 * 1437 * 4. Therefore, current and best both have partner replies or 1438 * both do not, so perform selection policy: 1439 * 1440 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1441 * select by bandwidth. 1442 * 1443 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1444 */ 1445 if (!best) 1446 return curr; 1447 1448 if (!curr->is_individual && best->is_individual) 1449 return curr; 1450 1451 if (curr->is_individual && !best->is_individual) 1452 return best; 1453 1454 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1455 return curr; 1456 1457 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1458 return best; 1459 1460 switch (__get_agg_selection_mode(curr->lag_ports)) { 1461 case BOND_AD_COUNT: 1462 if (curr->num_of_ports > best->num_of_ports) 1463 return curr; 1464 1465 if (curr->num_of_ports < best->num_of_ports) 1466 return best; 1467 1468 /*FALLTHROUGH*/ 1469 case BOND_AD_STABLE: 1470 case BOND_AD_BANDWIDTH: 1471 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1472 return curr; 1473 1474 break; 1475 1476 default: 1477 pr_warning("%s: Impossible agg select mode %d\n", 1478 curr->slave->dev->master->name, 1479 __get_agg_selection_mode(curr->lag_ports)); 1480 break; 1481 } 1482 1483 return best; 1484 } 1485 1486 static int agg_device_up(const struct aggregator *agg) 1487 { 1488 return (netif_running(agg->slave->dev) && 1489 netif_carrier_ok(agg->slave->dev)); 1490 } 1491 1492 /** 1493 * ad_agg_selection_logic - select an aggregation group for a team 1494 * @aggregator: the aggregator we're looking at 1495 * 1496 * It is assumed that only one aggregator may be selected for a team. 1497 * 1498 * The logic of this function is to select the aggregator according to 1499 * the ad_select policy: 1500 * 1501 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1502 * it, and to reselect the active aggregator only if the previous 1503 * aggregator has no more ports related to it. 1504 * 1505 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1506 * bandwidth, and reselect whenever a link state change takes place or the 1507 * set of slaves in the bond changes. 1508 * 1509 * BOND_AD_COUNT: select the aggregator with largest number of ports 1510 * (slaves), and reselect whenever a link state change takes place or the 1511 * set of slaves in the bond changes. 1512 * 1513 * FIXME: this function MUST be called with the first agg in the bond, or 1514 * __get_active_agg() won't work correctly. This function should be better 1515 * called with the bond itself, and retrieve the first agg from it. 1516 */ 1517 static void ad_agg_selection_logic(struct aggregator *agg) 1518 { 1519 struct aggregator *best, *active, *origin; 1520 struct port *port; 1521 1522 origin = agg; 1523 active = __get_active_agg(agg); 1524 best = (active && agg_device_up(active)) ? active : NULL; 1525 1526 do { 1527 agg->is_active = 0; 1528 1529 if (agg->num_of_ports && agg_device_up(agg)) 1530 best = ad_agg_selection_test(best, agg); 1531 1532 } while ((agg = __get_next_agg(agg))); 1533 1534 if (best && 1535 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1536 /* 1537 * For the STABLE policy, don't replace the old active 1538 * aggregator if it's still active (it has an answering 1539 * partner) or if both the best and active don't have an 1540 * answering partner. 1541 */ 1542 if (active && active->lag_ports && 1543 active->lag_ports->is_enabled && 1544 (__agg_has_partner(active) || 1545 (!__agg_has_partner(active) && !__agg_has_partner(best)))) { 1546 if (!(!active->actor_oper_aggregator_key && 1547 best->actor_oper_aggregator_key)) { 1548 best = NULL; 1549 active->is_active = 1; 1550 } 1551 } 1552 } 1553 1554 if (best && (best == active)) { 1555 best = NULL; 1556 active->is_active = 1; 1557 } 1558 1559 // if there is new best aggregator, activate it 1560 if (best) { 1561 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1562 best->aggregator_identifier, best->num_of_ports, 1563 best->actor_oper_aggregator_key, 1564 best->partner_oper_aggregator_key, 1565 best->is_individual, best->is_active); 1566 pr_debug("best ports %p slave %p %s\n", 1567 best->lag_ports, best->slave, 1568 best->slave ? best->slave->dev->name : "NULL"); 1569 1570 for (agg = __get_first_agg(best->lag_ports); agg; 1571 agg = __get_next_agg(agg)) { 1572 1573 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1574 agg->aggregator_identifier, agg->num_of_ports, 1575 agg->actor_oper_aggregator_key, 1576 agg->partner_oper_aggregator_key, 1577 agg->is_individual, agg->is_active); 1578 } 1579 1580 // check if any partner replys 1581 if (best->is_individual) { 1582 pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1583 best->slave ? best->slave->dev->master->name : "NULL"); 1584 } 1585 1586 best->is_active = 1; 1587 pr_debug("LAG %d chosen as the active LAG\n", 1588 best->aggregator_identifier); 1589 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1590 best->aggregator_identifier, best->num_of_ports, 1591 best->actor_oper_aggregator_key, 1592 best->partner_oper_aggregator_key, 1593 best->is_individual, best->is_active); 1594 1595 // disable the ports that were related to the former active_aggregator 1596 if (active) { 1597 for (port = active->lag_ports; port; 1598 port = port->next_port_in_aggregator) { 1599 __disable_port(port); 1600 } 1601 } 1602 } 1603 1604 /* 1605 * if the selected aggregator is of join individuals 1606 * (partner_system is NULL), enable their ports 1607 */ 1608 active = __get_active_agg(origin); 1609 1610 if (active) { 1611 if (!__agg_has_partner(active)) { 1612 for (port = active->lag_ports; port; 1613 port = port->next_port_in_aggregator) { 1614 __enable_port(port); 1615 } 1616 } 1617 } 1618 1619 if (origin->slave) { 1620 struct bonding *bond; 1621 1622 bond = bond_get_bond_by_slave(origin->slave); 1623 if (bond) 1624 bond_3ad_set_carrier(bond); 1625 } 1626 } 1627 1628 /** 1629 * ad_clear_agg - clear a given aggregator's parameters 1630 * @aggregator: the aggregator we're looking at 1631 * 1632 */ 1633 static void ad_clear_agg(struct aggregator *aggregator) 1634 { 1635 if (aggregator) { 1636 aggregator->is_individual = false; 1637 aggregator->actor_admin_aggregator_key = 0; 1638 aggregator->actor_oper_aggregator_key = 0; 1639 aggregator->partner_system = null_mac_addr; 1640 aggregator->partner_system_priority = 0; 1641 aggregator->partner_oper_aggregator_key = 0; 1642 aggregator->receive_state = 0; 1643 aggregator->transmit_state = 0; 1644 aggregator->lag_ports = NULL; 1645 aggregator->is_active = 0; 1646 aggregator->num_of_ports = 0; 1647 pr_debug("LAG %d was cleared\n", 1648 aggregator->aggregator_identifier); 1649 } 1650 } 1651 1652 /** 1653 * ad_initialize_agg - initialize a given aggregator's parameters 1654 * @aggregator: the aggregator we're looking at 1655 * 1656 */ 1657 static void ad_initialize_agg(struct aggregator *aggregator) 1658 { 1659 if (aggregator) { 1660 ad_clear_agg(aggregator); 1661 1662 aggregator->aggregator_mac_address = null_mac_addr; 1663 aggregator->aggregator_identifier = 0; 1664 aggregator->slave = NULL; 1665 } 1666 } 1667 1668 /** 1669 * ad_initialize_port - initialize a given port's parameters 1670 * @aggregator: the aggregator we're looking at 1671 * @lacp_fast: boolean. whether fast periodic should be used 1672 * 1673 */ 1674 static void ad_initialize_port(struct port *port, int lacp_fast) 1675 { 1676 static const struct port_params tmpl = { 1677 .system_priority = 0xffff, 1678 .key = 1, 1679 .port_number = 1, 1680 .port_priority = 0xff, 1681 .port_state = 1, 1682 }; 1683 static const struct lacpdu lacpdu = { 1684 .subtype = 0x01, 1685 .version_number = 0x01, 1686 .tlv_type_actor_info = 0x01, 1687 .actor_information_length = 0x14, 1688 .tlv_type_partner_info = 0x02, 1689 .partner_information_length = 0x14, 1690 .tlv_type_collector_info = 0x03, 1691 .collector_information_length = 0x10, 1692 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1693 }; 1694 1695 if (port) { 1696 port->actor_port_number = 1; 1697 port->actor_port_priority = 0xff; 1698 port->actor_system = null_mac_addr; 1699 port->actor_system_priority = 0xffff; 1700 port->actor_port_aggregator_identifier = 0; 1701 port->ntt = false; 1702 port->actor_admin_port_key = 1; 1703 port->actor_oper_port_key = 1; 1704 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1705 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; 1706 1707 if (lacp_fast) { 1708 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1709 } 1710 1711 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1712 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1713 1714 port->is_enabled = true; 1715 // ****** private parameters ****** 1716 port->sm_vars = 0x3; 1717 port->sm_rx_state = 0; 1718 port->sm_rx_timer_counter = 0; 1719 port->sm_periodic_state = 0; 1720 port->sm_periodic_timer_counter = 0; 1721 port->sm_mux_state = 0; 1722 port->sm_mux_timer_counter = 0; 1723 port->sm_tx_state = 0; 1724 port->sm_tx_timer_counter = 0; 1725 port->slave = NULL; 1726 port->aggregator = NULL; 1727 port->next_port_in_aggregator = NULL; 1728 port->transaction_id = 0; 1729 1730 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1731 } 1732 } 1733 1734 /** 1735 * ad_enable_collecting_distributing - enable a port's transmit/receive 1736 * @port: the port we're looking at 1737 * 1738 * Enable @port if it's in an active aggregator 1739 */ 1740 static void ad_enable_collecting_distributing(struct port *port) 1741 { 1742 if (port->aggregator->is_active) { 1743 pr_debug("Enabling port %d(LAG %d)\n", 1744 port->actor_port_number, 1745 port->aggregator->aggregator_identifier); 1746 __enable_port(port); 1747 } 1748 } 1749 1750 /** 1751 * ad_disable_collecting_distributing - disable a port's transmit/receive 1752 * @port: the port we're looking at 1753 * 1754 */ 1755 static void ad_disable_collecting_distributing(struct port *port) 1756 { 1757 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { 1758 pr_debug("Disabling port %d(LAG %d)\n", 1759 port->actor_port_number, 1760 port->aggregator->aggregator_identifier); 1761 __disable_port(port); 1762 } 1763 } 1764 1765 #if 0 1766 /** 1767 * ad_marker_info_send - send a marker information frame 1768 * @port: the port we're looking at 1769 * 1770 * This function does nothing since we decided not to implement send and handle 1771 * response for marker PDU's, in this stage, but only to respond to marker 1772 * information. 1773 */ 1774 static void ad_marker_info_send(struct port *port) 1775 { 1776 struct bond_marker marker; 1777 u16 index; 1778 1779 // fill the marker PDU with the appropriate values 1780 marker.subtype = 0x02; 1781 marker.version_number = 0x01; 1782 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; 1783 marker.marker_length = 0x16; 1784 // convert requester_port to Big Endian 1785 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); 1786 marker.requester_system = port->actor_system; 1787 // convert requester_port(u32) to Big Endian 1788 marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24)); 1789 marker.pad = 0; 1790 marker.tlv_type_terminator = 0x00; 1791 marker.terminator_length = 0x00; 1792 for (index=0; index<90; index++) { 1793 marker.reserved_90[index]=0; 1794 } 1795 1796 // send the marker information 1797 if (ad_marker_send(port, &marker) >= 0) { 1798 pr_debug("Sent Marker Information on port %d\n", 1799 port->actor_port_number); 1800 } 1801 } 1802 #endif 1803 1804 /** 1805 * ad_marker_info_received - handle receive of a Marker information frame 1806 * @marker_info: Marker info received 1807 * @port: the port we're looking at 1808 * 1809 */ 1810 static void ad_marker_info_received(struct bond_marker *marker_info, 1811 struct port *port) 1812 { 1813 struct bond_marker marker; 1814 1815 // copy the received marker data to the response marker 1816 //marker = *marker_info; 1817 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1818 // change the marker subtype to marker response 1819 marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE; 1820 // send the marker response 1821 1822 if (ad_marker_send(port, &marker) >= 0) { 1823 pr_debug("Sent Marker Response on port %d\n", 1824 port->actor_port_number); 1825 } 1826 } 1827 1828 /** 1829 * ad_marker_response_received - handle receive of a marker response frame 1830 * @marker: marker PDU received 1831 * @port: the port we're looking at 1832 * 1833 * This function does nothing since we decided not to implement send and handle 1834 * response for marker PDU's, in this stage, but only to respond to marker 1835 * information. 1836 */ 1837 static void ad_marker_response_received(struct bond_marker *marker, 1838 struct port *port) 1839 { 1840 marker=NULL; // just to satisfy the compiler 1841 port=NULL; // just to satisfy the compiler 1842 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW 1843 } 1844 1845 ////////////////////////////////////////////////////////////////////////////////////// 1846 // ================= AD exported functions to the main bonding code ================== 1847 ////////////////////////////////////////////////////////////////////////////////////// 1848 1849 // Check aggregators status in team every T seconds 1850 #define AD_AGGREGATOR_SELECTION_TIMER 8 1851 1852 /* 1853 * bond_3ad_initiate_agg_selection(struct bonding *bond) 1854 * 1855 * Set the aggregation selection timer, to initiate an agg selection in 1856 * the very near future. Called during first initialization, and during 1857 * any down to up transitions of the bond. 1858 */ 1859 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1860 { 1861 BOND_AD_INFO(bond).agg_select_timer = timeout; 1862 BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select; 1863 } 1864 1865 static u16 aggregator_identifier; 1866 1867 /** 1868 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1869 * @bond: bonding struct to work on 1870 * @tick_resolution: tick duration (millisecond resolution) 1871 * @lacp_fast: boolean. whether fast periodic should be used 1872 * 1873 * Can be called only after the mac address of the bond is set. 1874 */ 1875 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast) 1876 { 1877 // check that the bond is not initialized yet 1878 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1879 bond->dev->dev_addr)) { 1880 1881 aggregator_identifier = 0; 1882 1883 BOND_AD_INFO(bond).lacp_fast = lacp_fast; 1884 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; 1885 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); 1886 1887 // initialize how many times this module is called in one second(should be about every 100ms) 1888 ad_ticks_per_sec = tick_resolution; 1889 1890 bond_3ad_initiate_agg_selection(bond, 1891 AD_AGGREGATOR_SELECTION_TIMER * 1892 ad_ticks_per_sec); 1893 } 1894 } 1895 1896 /** 1897 * bond_3ad_bind_slave - initialize a slave's port 1898 * @slave: slave struct to work on 1899 * 1900 * Returns: 0 on success 1901 * < 0 on error 1902 */ 1903 int bond_3ad_bind_slave(struct slave *slave) 1904 { 1905 struct bonding *bond = bond_get_bond_by_slave(slave); 1906 struct port *port; 1907 struct aggregator *aggregator; 1908 1909 if (bond == NULL) { 1910 pr_err("%s: The slave %s is not attached to its bond\n", 1911 slave->dev->master->name, slave->dev->name); 1912 return -1; 1913 } 1914 1915 //check that the slave has not been intialized yet. 1916 if (SLAVE_AD_INFO(slave).port.slave != slave) { 1917 1918 // port initialization 1919 port = &(SLAVE_AD_INFO(slave).port); 1920 1921 ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast); 1922 1923 port->slave = slave; 1924 port->actor_port_number = SLAVE_AD_INFO(slave).id; 1925 // key is determined according to the link speed, duplex and user key(which is yet not supported) 1926 // ------------------------------------------------------------ 1927 // Port key : | User key | Speed |Duplex| 1928 // ------------------------------------------------------------ 1929 // 16 6 1 0 1930 port->actor_admin_port_key = 0; // initialize this parameter 1931 port->actor_admin_port_key |= __get_duplex(port); 1932 port->actor_admin_port_key |= (__get_link_speed(port) << 1); 1933 port->actor_oper_port_key = port->actor_admin_port_key; 1934 // if the port is not full duplex, then the port should be not lacp Enabled 1935 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { 1936 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1937 } 1938 // actor system is the bond's system 1939 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 1940 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) 1941 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1942 port->aggregator = NULL; 1943 port->next_port_in_aggregator = NULL; 1944 1945 __disable_port(port); 1946 __initialize_port_locks(port); 1947 1948 1949 // aggregator initialization 1950 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1951 1952 ad_initialize_agg(aggregator); 1953 1954 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 1955 aggregator->aggregator_identifier = (++aggregator_identifier); 1956 aggregator->slave = slave; 1957 aggregator->is_active = 0; 1958 aggregator->num_of_ports = 0; 1959 } 1960 1961 return 0; 1962 } 1963 1964 /** 1965 * bond_3ad_unbind_slave - deinitialize a slave's port 1966 * @slave: slave struct to work on 1967 * 1968 * Search for the aggregator that is related to this port, remove the 1969 * aggregator and assign another aggregator for other port related to it 1970 * (if any), and remove the port. 1971 */ 1972 void bond_3ad_unbind_slave(struct slave *slave) 1973 { 1974 struct port *port, *prev_port, *temp_port; 1975 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 1976 int select_new_active_agg = 0; 1977 1978 // find the aggregator related to this slave 1979 aggregator = &(SLAVE_AD_INFO(slave).aggregator); 1980 1981 // find the port related to this slave 1982 port = &(SLAVE_AD_INFO(slave).port); 1983 1984 // if slave is null, the whole port is not initialized 1985 if (!port->slave) { 1986 pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n", 1987 slave->dev->master->name, slave->dev->name); 1988 return; 1989 } 1990 1991 pr_debug("Unbinding Link Aggregation Group %d\n", 1992 aggregator->aggregator_identifier); 1993 1994 /* Tell the partner that this port is not suitable for aggregation */ 1995 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 1996 __update_lacpdu_from_port(port); 1997 ad_lacpdu_send(port); 1998 1999 // check if this aggregator is occupied 2000 if (aggregator->lag_ports) { 2001 // check if there are other ports related to this aggregator except 2002 // the port related to this slave(thats ensure us that there is a 2003 // reason to search for new aggregator, and that we will find one 2004 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { 2005 // find new aggregator for the related port(s) 2006 new_aggregator = __get_first_agg(port); 2007 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) { 2008 // if the new aggregator is empty, or it is connected to our port only 2009 if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) { 2010 break; 2011 } 2012 } 2013 // if new aggregator found, copy the aggregator's parameters 2014 // and connect the related lag_ports to the new aggregator 2015 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2016 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", 2017 aggregator->aggregator_identifier, 2018 new_aggregator->aggregator_identifier); 2019 2020 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { 2021 pr_info("%s: Removing an active aggregator\n", 2022 aggregator->slave->dev->master->name); 2023 // select new active aggregator 2024 select_new_active_agg = 1; 2025 } 2026 2027 new_aggregator->is_individual = aggregator->is_individual; 2028 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2029 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2030 new_aggregator->partner_system = aggregator->partner_system; 2031 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2032 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2033 new_aggregator->receive_state = aggregator->receive_state; 2034 new_aggregator->transmit_state = aggregator->transmit_state; 2035 new_aggregator->lag_ports = aggregator->lag_ports; 2036 new_aggregator->is_active = aggregator->is_active; 2037 new_aggregator->num_of_ports = aggregator->num_of_ports; 2038 2039 // update the information that is written on the ports about the aggregator 2040 for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) { 2041 temp_port->aggregator=new_aggregator; 2042 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2043 } 2044 2045 // clear the aggregator 2046 ad_clear_agg(aggregator); 2047 2048 if (select_new_active_agg) { 2049 ad_agg_selection_logic(__get_first_agg(port)); 2050 } 2051 } else { 2052 pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n", 2053 slave->dev->master->name); 2054 } 2055 } else { // in case that the only port related to this aggregator is the one we want to remove 2056 select_new_active_agg = aggregator->is_active; 2057 // clear the aggregator 2058 ad_clear_agg(aggregator); 2059 if (select_new_active_agg) { 2060 pr_info("%s: Removing an active aggregator\n", 2061 slave->dev->master->name); 2062 // select new active aggregator 2063 ad_agg_selection_logic(__get_first_agg(port)); 2064 } 2065 } 2066 } 2067 2068 pr_debug("Unbinding port %d\n", port->actor_port_number); 2069 // find the aggregator that this port is connected to 2070 temp_aggregator = __get_first_agg(port); 2071 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) { 2072 prev_port = NULL; 2073 // search the port in the aggregator's related ports 2074 for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) { 2075 if (temp_port == port) { // the aggregator found - detach the port from this aggregator 2076 if (prev_port) { 2077 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2078 } else { 2079 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2080 } 2081 temp_aggregator->num_of_ports--; 2082 if (temp_aggregator->num_of_ports==0) { 2083 select_new_active_agg = temp_aggregator->is_active; 2084 // clear the aggregator 2085 ad_clear_agg(temp_aggregator); 2086 if (select_new_active_agg) { 2087 pr_info("%s: Removing an active aggregator\n", 2088 slave->dev->master->name); 2089 // select new active aggregator 2090 ad_agg_selection_logic(__get_first_agg(port)); 2091 } 2092 } 2093 break; 2094 } 2095 } 2096 } 2097 port->slave=NULL; 2098 } 2099 2100 /** 2101 * bond_3ad_state_machine_handler - handle state machines timeout 2102 * @bond: bonding struct to work on 2103 * 2104 * The state machine handling concept in this module is to check every tick 2105 * which state machine should operate any function. The execution order is 2106 * round robin, so when we have an interaction between state machines, the 2107 * reply of one to each other might be delayed until next tick. 2108 * 2109 * This function also complete the initialization when the agg_select_timer 2110 * times out, and it selects an aggregator for the ports that are yet not 2111 * related to any aggregator, and selects the active aggregator for a bond. 2112 */ 2113 void bond_3ad_state_machine_handler(struct work_struct *work) 2114 { 2115 struct bonding *bond = container_of(work, struct bonding, 2116 ad_work.work); 2117 struct port *port; 2118 struct aggregator *aggregator; 2119 2120 read_lock(&bond->lock); 2121 2122 if (bond->kill_timers) { 2123 goto out; 2124 } 2125 2126 //check if there are any slaves 2127 if (bond->slave_cnt == 0) { 2128 goto re_arm; 2129 } 2130 2131 // check if agg_select_timer timer after initialize is timed out 2132 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { 2133 // select the active aggregator for the bond 2134 if ((port = __get_first_port(bond))) { 2135 if (!port->slave) { 2136 pr_warning("%s: Warning: bond's first port is uninitialized\n", 2137 bond->dev->name); 2138 goto re_arm; 2139 } 2140 2141 aggregator = __get_first_agg(port); 2142 ad_agg_selection_logic(aggregator); 2143 } 2144 bond_3ad_set_carrier(bond); 2145 } 2146 2147 // for each port run the state machines 2148 for (port = __get_first_port(bond); port; port = __get_next_port(port)) { 2149 if (!port->slave) { 2150 pr_warning("%s: Warning: Found an uninitialized port\n", 2151 bond->dev->name); 2152 goto re_arm; 2153 } 2154 2155 ad_rx_machine(NULL, port); 2156 ad_periodic_machine(port); 2157 ad_port_selection_logic(port); 2158 ad_mux_machine(port); 2159 ad_tx_machine(port); 2160 2161 // turn off the BEGIN bit, since we already handled it 2162 if (port->sm_vars & AD_PORT_BEGIN) { 2163 port->sm_vars &= ~AD_PORT_BEGIN; 2164 } 2165 } 2166 2167 re_arm: 2168 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2169 out: 2170 read_unlock(&bond->lock); 2171 } 2172 2173 /** 2174 * bond_3ad_rx_indication - handle a received frame 2175 * @lacpdu: received lacpdu 2176 * @slave: slave struct to work on 2177 * @length: length of the data received 2178 * 2179 * It is assumed that frames that were sent on this NIC don't returned as new 2180 * received frames (loopback). Since only the payload is given to this 2181 * function, it check for loopback. 2182 */ 2183 static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) 2184 { 2185 struct port *port; 2186 2187 if (length >= sizeof(struct lacpdu)) { 2188 2189 port = &(SLAVE_AD_INFO(slave).port); 2190 2191 if (!port->slave) { 2192 pr_warning("%s: Warning: port of slave %s is uninitialized\n", 2193 slave->dev->name, slave->dev->master->name); 2194 return; 2195 } 2196 2197 switch (lacpdu->subtype) { 2198 case AD_TYPE_LACPDU: 2199 pr_debug("Received LACPDU on port %d\n", 2200 port->actor_port_number); 2201 ad_rx_machine(lacpdu, port); 2202 break; 2203 2204 case AD_TYPE_MARKER: 2205 // No need to convert fields to Little Endian since we don't use the marker's fields. 2206 2207 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2208 case AD_MARKER_INFORMATION_SUBTYPE: 2209 pr_debug("Received Marker Information on port %d\n", 2210 port->actor_port_number); 2211 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2212 break; 2213 2214 case AD_MARKER_RESPONSE_SUBTYPE: 2215 pr_debug("Received Marker Response on port %d\n", 2216 port->actor_port_number); 2217 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2218 break; 2219 2220 default: 2221 pr_debug("Received an unknown Marker subtype on slot %d\n", 2222 port->actor_port_number); 2223 } 2224 } 2225 } 2226 } 2227 2228 /** 2229 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication 2230 * @slave: slave struct to work on 2231 * 2232 * Handle reselection of aggregator (if needed) for this port. 2233 */ 2234 void bond_3ad_adapter_speed_changed(struct slave *slave) 2235 { 2236 struct port *port; 2237 2238 port = &(SLAVE_AD_INFO(slave).port); 2239 2240 // if slave is null, the whole port is not initialized 2241 if (!port->slave) { 2242 pr_warning("Warning: %s: speed changed for uninitialized port on %s\n", 2243 slave->dev->master->name, slave->dev->name); 2244 return; 2245 } 2246 2247 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2248 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); 2249 pr_debug("Port %d changed speed\n", port->actor_port_number); 2250 // there is no need to reselect a new aggregator, just signal the 2251 // state machines to reinitialize 2252 port->sm_vars |= AD_PORT_BEGIN; 2253 } 2254 2255 /** 2256 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication 2257 * @slave: slave struct to work on 2258 * 2259 * Handle reselection of aggregator (if needed) for this port. 2260 */ 2261 void bond_3ad_adapter_duplex_changed(struct slave *slave) 2262 { 2263 struct port *port; 2264 2265 port=&(SLAVE_AD_INFO(slave).port); 2266 2267 // if slave is null, the whole port is not initialized 2268 if (!port->slave) { 2269 pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n", 2270 slave->dev->master->name, slave->dev->name); 2271 return; 2272 } 2273 2274 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2275 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); 2276 pr_debug("Port %d changed duplex\n", port->actor_port_number); 2277 // there is no need to reselect a new aggregator, just signal the 2278 // state machines to reinitialize 2279 port->sm_vars |= AD_PORT_BEGIN; 2280 } 2281 2282 /** 2283 * bond_3ad_handle_link_change - handle a slave's link status change indication 2284 * @slave: slave struct to work on 2285 * @status: whether the link is now up or down 2286 * 2287 * Handle reselection of aggregator (if needed) for this port. 2288 */ 2289 void bond_3ad_handle_link_change(struct slave *slave, char link) 2290 { 2291 struct port *port; 2292 2293 port = &(SLAVE_AD_INFO(slave).port); 2294 2295 // if slave is null, the whole port is not initialized 2296 if (!port->slave) { 2297 pr_warning("Warning: %s: link status changed for uninitialized port on %s\n", 2298 slave->dev->master->name, slave->dev->name); 2299 return; 2300 } 2301 2302 // 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) 2303 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report 2304 if (link == BOND_LINK_UP) { 2305 port->is_enabled = true; 2306 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2307 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); 2308 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; 2309 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); 2310 } else { 2311 /* link has failed */ 2312 port->is_enabled = false; 2313 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; 2314 port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS); 2315 } 2316 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); 2317 // there is no need to reselect a new aggregator, just signal the 2318 // state machines to reinitialize 2319 port->sm_vars |= AD_PORT_BEGIN; 2320 } 2321 2322 /* 2323 * set link state for bonding master: if we have an active 2324 * aggregator, we're up, if not, we're down. Presumes that we cannot 2325 * have an active aggregator if there are no slaves with link up. 2326 * 2327 * This behavior complies with IEEE 802.3 section 43.3.9. 2328 * 2329 * Called by bond_set_carrier(). Return zero if carrier state does not 2330 * change, nonzero if it does. 2331 */ 2332 int bond_3ad_set_carrier(struct bonding *bond) 2333 { 2334 if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) { 2335 if (!netif_carrier_ok(bond->dev)) { 2336 netif_carrier_on(bond->dev); 2337 return 1; 2338 } 2339 return 0; 2340 } 2341 2342 if (netif_carrier_ok(bond->dev)) { 2343 netif_carrier_off(bond->dev); 2344 return 1; 2345 } 2346 return 0; 2347 } 2348 2349 /** 2350 * bond_3ad_get_active_agg_info - get information of the active aggregator 2351 * @bond: bonding struct to work on 2352 * @ad_info: ad_info struct to fill with the bond's info 2353 * 2354 * Returns: 0 on success 2355 * < 0 on error 2356 */ 2357 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2358 { 2359 struct aggregator *aggregator = NULL; 2360 struct port *port; 2361 2362 for (port = __get_first_port(bond); port; port = __get_next_port(port)) { 2363 if (port->aggregator && port->aggregator->is_active) { 2364 aggregator = port->aggregator; 2365 break; 2366 } 2367 } 2368 2369 if (aggregator) { 2370 ad_info->aggregator_id = aggregator->aggregator_identifier; 2371 ad_info->ports = aggregator->num_of_ports; 2372 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2373 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2374 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); 2375 return 0; 2376 } 2377 2378 return -1; 2379 } 2380 2381 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) 2382 { 2383 struct slave *slave, *start_at; 2384 struct bonding *bond = netdev_priv(dev); 2385 int slave_agg_no; 2386 int slaves_in_agg; 2387 int agg_id; 2388 int i; 2389 struct ad_info ad_info; 2390 int res = 1; 2391 2392 /* make sure that the slaves list will 2393 * not change during tx 2394 */ 2395 read_lock(&bond->lock); 2396 2397 if (!BOND_IS_OK(bond)) { 2398 goto out; 2399 } 2400 2401 if (bond_3ad_get_active_agg_info(bond, &ad_info)) { 2402 pr_debug("%s: Error: bond_3ad_get_active_agg_info failed\n", 2403 dev->name); 2404 goto out; 2405 } 2406 2407 slaves_in_agg = ad_info.ports; 2408 agg_id = ad_info.aggregator_id; 2409 2410 if (slaves_in_agg == 0) { 2411 /*the aggregator is empty*/ 2412 pr_debug("%s: Error: active aggregator is empty\n", dev->name); 2413 goto out; 2414 } 2415 2416 slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg); 2417 2418 bond_for_each_slave(bond, slave, i) { 2419 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; 2420 2421 if (agg && (agg->aggregator_identifier == agg_id)) { 2422 slave_agg_no--; 2423 if (slave_agg_no < 0) { 2424 break; 2425 } 2426 } 2427 } 2428 2429 if (slave_agg_no >= 0) { 2430 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n", 2431 dev->name, agg_id); 2432 goto out; 2433 } 2434 2435 start_at = slave; 2436 2437 bond_for_each_slave_from(bond, slave, i, start_at) { 2438 int slave_agg_id = 0; 2439 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; 2440 2441 if (agg) { 2442 slave_agg_id = agg->aggregator_identifier; 2443 } 2444 2445 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) { 2446 res = bond_dev_queue_xmit(bond, skb, slave->dev); 2447 break; 2448 } 2449 } 2450 2451 out: 2452 if (res) { 2453 /* no suitable interface, frame not sent */ 2454 dev_kfree_skb(skb); 2455 } 2456 read_unlock(&bond->lock); 2457 return NETDEV_TX_OK; 2458 } 2459 2460 int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev) 2461 { 2462 struct bonding *bond = netdev_priv(dev); 2463 struct slave *slave = NULL; 2464 int ret = NET_RX_DROP; 2465 2466 if (!(dev->flags & IFF_MASTER)) 2467 goto out; 2468 2469 read_lock(&bond->lock); 2470 slave = bond_get_slave_by_dev((struct bonding *)netdev_priv(dev), 2471 orig_dev); 2472 if (!slave) 2473 goto out_unlock; 2474 2475 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len); 2476 2477 ret = NET_RX_SUCCESS; 2478 2479 out_unlock: 2480 read_unlock(&bond->lock); 2481 out: 2482 dev_kfree_skb(skb); 2483 2484 return ret; 2485 } 2486