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 <net/bonding.h> 33 #include <net/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 61 * 802.3ad standard) 62 */ 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 */ 82 #define AD_DUPLEX_KEY_MASKS 0x1 83 #define AD_SPEED_KEY_MASKS 0x3E 84 #define AD_USER_KEY_MASKS 0xFFC0 85 86 enum ad_link_speed_type { 87 AD_LINK_SPEED_1MBPS = 1, 88 AD_LINK_SPEED_10MBPS, 89 AD_LINK_SPEED_100MBPS, 90 AD_LINK_SPEED_1000MBPS, 91 AD_LINK_SPEED_2500MBPS, 92 AD_LINK_SPEED_10000MBPS, 93 AD_LINK_SPEED_20000MBPS, 94 AD_LINK_SPEED_40000MBPS, 95 AD_LINK_SPEED_56000MBPS 96 }; 97 98 /* compare MAC addresses */ 99 #define MAC_ADDRESS_EQUAL(A, B) \ 100 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 101 102 static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; 103 static u16 ad_ticks_per_sec; 104 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 105 106 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; 107 108 /* ================= main 802.3ad protocol functions ================== */ 109 static int ad_lacpdu_send(struct port *port); 110 static int ad_marker_send(struct port *port, struct bond_marker *marker); 111 static void ad_mux_machine(struct port *port, bool *update_slave_arr); 112 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 113 static void ad_tx_machine(struct port *port); 114 static void ad_periodic_machine(struct port *port); 115 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 116 static void ad_agg_selection_logic(struct aggregator *aggregator, 117 bool *update_slave_arr); 118 static void ad_clear_agg(struct aggregator *aggregator); 119 static void ad_initialize_agg(struct aggregator *aggregator); 120 static void ad_initialize_port(struct port *port, int lacp_fast); 121 static void ad_enable_collecting_distributing(struct port *port, 122 bool *update_slave_arr); 123 static void ad_disable_collecting_distributing(struct port *port, 124 bool *update_slave_arr); 125 static void ad_marker_info_received(struct bond_marker *marker_info, 126 struct port *port); 127 static void ad_marker_response_received(struct bond_marker *marker, 128 struct port *port); 129 130 131 /* ================= api to bonding and kernel code ================== */ 132 133 /** 134 * __get_bond_by_port - get the port's bonding struct 135 * @port: the port we're looking at 136 * 137 * Return @port's bonding struct, or %NULL if it can't be found. 138 */ 139 static inline struct bonding *__get_bond_by_port(struct port *port) 140 { 141 if (port->slave == NULL) 142 return NULL; 143 144 return bond_get_bond_by_slave(port->slave); 145 } 146 147 /** 148 * __get_first_agg - get the first aggregator in the bond 149 * @bond: the bond we're looking at 150 * 151 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 152 * found. 153 * The caller must hold RCU or RTNL lock. 154 */ 155 static inline struct aggregator *__get_first_agg(struct port *port) 156 { 157 struct bonding *bond = __get_bond_by_port(port); 158 struct slave *first_slave; 159 struct aggregator *agg; 160 161 /* If there's no bond for this port, or bond has no slaves */ 162 if (bond == NULL) 163 return NULL; 164 165 rcu_read_lock(); 166 first_slave = bond_first_slave_rcu(bond); 167 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 168 rcu_read_unlock(); 169 170 return agg; 171 } 172 173 /** 174 * __agg_has_partner - see if we have a partner 175 * @agg: the agregator we're looking at 176 * 177 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 178 * address for the partner). Return 0 if not. 179 */ 180 static inline int __agg_has_partner(struct aggregator *agg) 181 { 182 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 183 } 184 185 /** 186 * __disable_port - disable the port's slave 187 * @port: the port we're looking at 188 */ 189 static inline void __disable_port(struct port *port) 190 { 191 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 192 } 193 194 /** 195 * __enable_port - enable the port's slave, if it's up 196 * @port: the port we're looking at 197 */ 198 static inline void __enable_port(struct port *port) 199 { 200 struct slave *slave = port->slave; 201 202 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 203 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 204 } 205 206 /** 207 * __port_is_enabled - check if the port's slave is in active state 208 * @port: the port we're looking at 209 */ 210 static inline int __port_is_enabled(struct port *port) 211 { 212 return bond_is_active_slave(port->slave); 213 } 214 215 /** 216 * __get_agg_selection_mode - get the aggregator selection mode 217 * @port: the port we're looking at 218 * 219 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 220 */ 221 static inline u32 __get_agg_selection_mode(struct port *port) 222 { 223 struct bonding *bond = __get_bond_by_port(port); 224 225 if (bond == NULL) 226 return BOND_AD_STABLE; 227 228 return bond->params.ad_select; 229 } 230 231 /** 232 * __check_agg_selection_timer - check if the selection timer has expired 233 * @port: the port we're looking at 234 */ 235 static inline int __check_agg_selection_timer(struct port *port) 236 { 237 struct bonding *bond = __get_bond_by_port(port); 238 239 if (bond == NULL) 240 return 0; 241 242 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 243 } 244 245 /** 246 * __get_link_speed - get a port's speed 247 * @port: the port we're looking at 248 * 249 * Return @port's speed in 802.3ad enum format. i.e. one of: 250 * 0, 251 * %AD_LINK_SPEED_10MBPS, 252 * %AD_LINK_SPEED_100MBPS, 253 * %AD_LINK_SPEED_1000MBPS, 254 * %AD_LINK_SPEED_2500MBPS, 255 * %AD_LINK_SPEED_10000MBPS 256 * %AD_LINK_SPEED_20000MBPS 257 * %AD_LINK_SPEED_40000MBPS 258 * %AD_LINK_SPEED_56000MBPS 259 */ 260 static u16 __get_link_speed(struct port *port) 261 { 262 struct slave *slave = port->slave; 263 u16 speed; 264 265 /* this if covers only a special case: when the configuration starts 266 * with link down, it sets the speed to 0. 267 * This is done in spite of the fact that the e100 driver reports 0 268 * to be compatible with MVT in the future. 269 */ 270 if (slave->link != BOND_LINK_UP) 271 speed = 0; 272 else { 273 switch (slave->speed) { 274 case SPEED_10: 275 speed = AD_LINK_SPEED_10MBPS; 276 break; 277 278 case SPEED_100: 279 speed = AD_LINK_SPEED_100MBPS; 280 break; 281 282 case SPEED_1000: 283 speed = AD_LINK_SPEED_1000MBPS; 284 break; 285 286 case SPEED_2500: 287 speed = AD_LINK_SPEED_2500MBPS; 288 break; 289 290 case SPEED_10000: 291 speed = AD_LINK_SPEED_10000MBPS; 292 break; 293 294 case SPEED_20000: 295 speed = AD_LINK_SPEED_20000MBPS; 296 break; 297 298 case SPEED_40000: 299 speed = AD_LINK_SPEED_40000MBPS; 300 break; 301 302 case SPEED_56000: 303 speed = AD_LINK_SPEED_56000MBPS; 304 break; 305 306 default: 307 /* unknown speed value from ethtool. shouldn't happen */ 308 speed = 0; 309 break; 310 } 311 } 312 313 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", 314 port->actor_port_number, speed); 315 return speed; 316 } 317 318 /** 319 * __get_duplex - get a port's duplex 320 * @port: the port we're looking at 321 * 322 * Return @port's duplex in 802.3ad bitmask format. i.e.: 323 * 0x01 if in full duplex 324 * 0x00 otherwise 325 */ 326 static u8 __get_duplex(struct port *port) 327 { 328 struct slave *slave = port->slave; 329 u8 retval; 330 331 /* handling a special case: when the configuration starts with 332 * link down, it sets the duplex to 0. 333 */ 334 if (slave->link != BOND_LINK_UP) { 335 retval = 0x0; 336 } else { 337 switch (slave->duplex) { 338 case DUPLEX_FULL: 339 retval = 0x1; 340 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", 341 port->actor_port_number); 342 break; 343 case DUPLEX_HALF: 344 default: 345 retval = 0x0; 346 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", 347 port->actor_port_number); 348 break; 349 } 350 } 351 return retval; 352 } 353 354 /* Conversions */ 355 356 /** 357 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 358 * @timer_type: which timer to operate 359 * @par: timer parameter. see below 360 * 361 * If @timer_type is %current_while_timer, @par indicates long/short timer. 362 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 363 * %SLOW_PERIODIC_TIME. 364 */ 365 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 366 { 367 u16 retval = 0; /* to silence the compiler */ 368 369 switch (timer_type) { 370 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 371 if (par) 372 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 373 else 374 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 375 break; 376 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 377 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 378 break; 379 case AD_PERIODIC_TIMER: /* for periodic machine */ 380 retval = (par*ad_ticks_per_sec); /* long timeout */ 381 break; 382 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 383 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 384 break; 385 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 386 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 387 break; 388 } 389 390 return retval; 391 } 392 393 394 /* ================= ad_rx_machine helper functions ================== */ 395 396 /** 397 * __choose_matched - update a port's matched variable from a received lacpdu 398 * @lacpdu: the lacpdu we've received 399 * @port: the port we're looking at 400 * 401 * Update the value of the matched variable, using parameter values from a 402 * newly received lacpdu. Parameter values for the partner carried in the 403 * received PDU are compared with the corresponding operational parameter 404 * values for the actor. Matched is set to TRUE if all of these parameters 405 * match and the PDU parameter partner_state.aggregation has the same value as 406 * actor_oper_port_state.aggregation and lacp will actively maintain the link 407 * in the aggregation. Matched is also set to TRUE if the value of 408 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 409 * an individual link and lacp will actively maintain the link. Otherwise, 410 * matched is set to FALSE. LACP is considered to be actively maintaining the 411 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 412 * the actor's actor_oper_port_state.lacp_activity and the PDU's 413 * partner_state.lacp_activity variables are TRUE. 414 * 415 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 416 * used here to implement the language from 802.3ad 43.4.9 that requires 417 * recordPDU to "match" the LACPDU parameters to the stored values. 418 */ 419 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 420 { 421 /* check if all parameters are alike 422 * or this is individual link(aggregation == FALSE) 423 * then update the state machine Matched variable. 424 */ 425 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 426 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 427 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 428 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 429 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 430 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 431 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 432 ) { 433 port->sm_vars |= AD_PORT_MATCHED; 434 } else { 435 port->sm_vars &= ~AD_PORT_MATCHED; 436 } 437 } 438 439 /** 440 * __record_pdu - record parameters from a received lacpdu 441 * @lacpdu: the lacpdu we've received 442 * @port: the port we're looking at 443 * 444 * Record the parameter values for the Actor carried in a received lacpdu as 445 * the current partner operational parameter values and sets 446 * actor_oper_port_state.defaulted to FALSE. 447 */ 448 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 449 { 450 if (lacpdu && port) { 451 struct port_params *partner = &port->partner_oper; 452 453 __choose_matched(lacpdu, port); 454 /* record the new parameter values for the partner 455 * operational 456 */ 457 partner->port_number = ntohs(lacpdu->actor_port); 458 partner->port_priority = ntohs(lacpdu->actor_port_priority); 459 partner->system = lacpdu->actor_system; 460 partner->system_priority = ntohs(lacpdu->actor_system_priority); 461 partner->key = ntohs(lacpdu->actor_key); 462 partner->port_state = lacpdu->actor_state; 463 464 /* set actor_oper_port_state.defaulted to FALSE */ 465 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 466 467 /* set the partner sync. to on if the partner is sync, 468 * and the port is matched 469 */ 470 if ((port->sm_vars & AD_PORT_MATCHED) && 471 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 472 partner->port_state |= AD_STATE_SYNCHRONIZATION; 473 pr_debug("%s partner sync=1\n", port->slave->dev->name); 474 } else { 475 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 476 pr_debug("%s partner sync=0\n", port->slave->dev->name); 477 } 478 } 479 } 480 481 /** 482 * __record_default - record default parameters 483 * @port: the port we're looking at 484 * 485 * This function records the default parameter values for the partner carried 486 * in the Partner Admin parameters as the current partner operational parameter 487 * values and sets actor_oper_port_state.defaulted to TRUE. 488 */ 489 static void __record_default(struct port *port) 490 { 491 if (port) { 492 /* record the partner admin parameters */ 493 memcpy(&port->partner_oper, &port->partner_admin, 494 sizeof(struct port_params)); 495 496 /* set actor_oper_port_state.defaulted to true */ 497 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 498 } 499 } 500 501 /** 502 * __update_selected - update a port's Selected variable from a received lacpdu 503 * @lacpdu: the lacpdu we've received 504 * @port: the port we're looking at 505 * 506 * Update the value of the selected variable, using parameter values from a 507 * newly received lacpdu. The parameter values for the Actor carried in the 508 * received PDU are compared with the corresponding operational parameter 509 * values for the ports partner. If one or more of the comparisons shows that 510 * the value(s) received in the PDU differ from the current operational values, 511 * then selected is set to FALSE and actor_oper_port_state.synchronization is 512 * set to out_of_sync. Otherwise, selected remains unchanged. 513 */ 514 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 515 { 516 if (lacpdu && port) { 517 const struct port_params *partner = &port->partner_oper; 518 519 /* check if any parameter is different then 520 * update the state machine selected variable. 521 */ 522 if (ntohs(lacpdu->actor_port) != partner->port_number || 523 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 524 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 525 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 526 ntohs(lacpdu->actor_key) != partner->key || 527 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 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 then 552 * update the state machine selected variable. 553 */ 554 if (admin->port_number != oper->port_number || 555 admin->port_priority != oper->port_priority || 556 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 557 admin->system_priority != oper->system_priority || 558 admin->key != oper->key || 559 (admin->port_state & AD_STATE_AGGREGATION) 560 != (oper->port_state & AD_STATE_AGGREGATION)) { 561 port->sm_vars &= ~AD_PORT_SELECTED; 562 } 563 } 564 } 565 566 /** 567 * __update_ntt - update a port's ntt variable from a received lacpdu 568 * @lacpdu: the lacpdu we've received 569 * @port: the port we're looking at 570 * 571 * Updates the value of the ntt variable, using parameter values from a newly 572 * received lacpdu. The parameter values for the partner carried in the 573 * received PDU are compared with the corresponding operational parameter 574 * values for the Actor. If one or more of the comparisons shows that the 575 * value(s) received in the PDU differ from the current operational values, 576 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 577 */ 578 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 579 { 580 /* validate lacpdu and port */ 581 if (lacpdu && port) { 582 /* check if any parameter is different then 583 * update the port->ntt. 584 */ 585 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 586 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 587 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 588 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 589 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 590 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 591 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 592 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 593 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 594 ) { 595 port->ntt = true; 596 } 597 } 598 } 599 600 /** 601 * __agg_ports_are_ready - check if all ports in an aggregator are ready 602 * @aggregator: the aggregator we're looking at 603 * 604 */ 605 static int __agg_ports_are_ready(struct aggregator *aggregator) 606 { 607 struct port *port; 608 int retval = 1; 609 610 if (aggregator) { 611 /* scan all ports in this aggregator to verfy if they are 612 * all ready. 613 */ 614 for (port = aggregator->lag_ports; 615 port; 616 port = port->next_port_in_aggregator) { 617 if (!(port->sm_vars & AD_PORT_READY_N)) { 618 retval = 0; 619 break; 620 } 621 } 622 } 623 624 return retval; 625 } 626 627 /** 628 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 629 * @aggregator: the aggregator we're looking at 630 * @val: Should the ports' ready bit be set on or off 631 * 632 */ 633 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 634 { 635 struct port *port; 636 637 for (port = aggregator->lag_ports; port; 638 port = port->next_port_in_aggregator) { 639 if (val) 640 port->sm_vars |= AD_PORT_READY; 641 else 642 port->sm_vars &= ~AD_PORT_READY; 643 } 644 } 645 646 /** 647 * __get_agg_bandwidth - get the total bandwidth of an aggregator 648 * @aggregator: the aggregator we're looking at 649 * 650 */ 651 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 652 { 653 u32 bandwidth = 0; 654 655 if (aggregator->num_of_ports) { 656 switch (__get_link_speed(aggregator->lag_ports)) { 657 case AD_LINK_SPEED_1MBPS: 658 bandwidth = aggregator->num_of_ports; 659 break; 660 case AD_LINK_SPEED_10MBPS: 661 bandwidth = aggregator->num_of_ports * 10; 662 break; 663 case AD_LINK_SPEED_100MBPS: 664 bandwidth = aggregator->num_of_ports * 100; 665 break; 666 case AD_LINK_SPEED_1000MBPS: 667 bandwidth = aggregator->num_of_ports * 1000; 668 break; 669 case AD_LINK_SPEED_2500MBPS: 670 bandwidth = aggregator->num_of_ports * 2500; 671 break; 672 case AD_LINK_SPEED_10000MBPS: 673 bandwidth = aggregator->num_of_ports * 10000; 674 break; 675 case AD_LINK_SPEED_20000MBPS: 676 bandwidth = aggregator->num_of_ports * 20000; 677 break; 678 case AD_LINK_SPEED_40000MBPS: 679 bandwidth = aggregator->num_of_ports * 40000; 680 break; 681 case AD_LINK_SPEED_56000MBPS: 682 bandwidth = aggregator->num_of_ports * 56000; 683 break; 684 default: 685 bandwidth = 0; /* to silence the compiler */ 686 } 687 } 688 return bandwidth; 689 } 690 691 /** 692 * __get_active_agg - get the current active aggregator 693 * @aggregator: the aggregator we're looking at 694 * 695 * Caller must hold RCU lock. 696 */ 697 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 698 { 699 struct bonding *bond = aggregator->slave->bond; 700 struct list_head *iter; 701 struct slave *slave; 702 703 bond_for_each_slave_rcu(bond, slave, iter) 704 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 705 return &(SLAVE_AD_INFO(slave)->aggregator); 706 707 return NULL; 708 } 709 710 /** 711 * __update_lacpdu_from_port - update a port's lacpdu fields 712 * @port: the port we're looking at 713 */ 714 static inline void __update_lacpdu_from_port(struct port *port) 715 { 716 struct lacpdu *lacpdu = &port->lacpdu; 717 const struct port_params *partner = &port->partner_oper; 718 719 /* update current actual Actor parameters 720 * lacpdu->subtype initialized 721 * lacpdu->version_number initialized 722 * lacpdu->tlv_type_actor_info initialized 723 * lacpdu->actor_information_length initialized 724 */ 725 726 lacpdu->actor_system_priority = htons(port->actor_system_priority); 727 lacpdu->actor_system = port->actor_system; 728 lacpdu->actor_key = htons(port->actor_oper_port_key); 729 lacpdu->actor_port_priority = htons(port->actor_port_priority); 730 lacpdu->actor_port = htons(port->actor_port_number); 731 lacpdu->actor_state = port->actor_oper_port_state; 732 pr_debug("update lacpdu: %s, actor port state %x\n", 733 port->slave->dev->name, port->actor_oper_port_state); 734 735 /* lacpdu->reserved_3_1 initialized 736 * lacpdu->tlv_type_partner_info initialized 737 * lacpdu->partner_information_length initialized 738 */ 739 740 lacpdu->partner_system_priority = htons(partner->system_priority); 741 lacpdu->partner_system = partner->system; 742 lacpdu->partner_key = htons(partner->key); 743 lacpdu->partner_port_priority = htons(partner->port_priority); 744 lacpdu->partner_port = htons(partner->port_number); 745 lacpdu->partner_state = partner->port_state; 746 747 /* lacpdu->reserved_3_2 initialized 748 * lacpdu->tlv_type_collector_info initialized 749 * lacpdu->collector_information_length initialized 750 * collector_max_delay initialized 751 * reserved_12[12] initialized 752 * tlv_type_terminator initialized 753 * terminator_length initialized 754 * reserved_50[50] initialized 755 */ 756 } 757 758 /* ================= main 802.3ad protocol code ========================= */ 759 760 /** 761 * ad_lacpdu_send - send out a lacpdu packet on a given port 762 * @port: the port we're looking at 763 * 764 * Returns: 0 on success 765 * < 0 on error 766 */ 767 static int ad_lacpdu_send(struct port *port) 768 { 769 struct slave *slave = port->slave; 770 struct sk_buff *skb; 771 struct lacpdu_header *lacpdu_header; 772 int length = sizeof(struct lacpdu_header); 773 774 skb = dev_alloc_skb(length); 775 if (!skb) 776 return -ENOMEM; 777 778 skb->dev = slave->dev; 779 skb_reset_mac_header(skb); 780 skb->network_header = skb->mac_header + ETH_HLEN; 781 skb->protocol = PKT_TYPE_LACPDU; 782 skb->priority = TC_PRIO_CONTROL; 783 784 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 785 786 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 787 /* Note: source address is set to be the member's PERMANENT address, 788 * because we use it to identify loopback lacpdus in receive. 789 */ 790 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 791 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 792 793 lacpdu_header->lacpdu = port->lacpdu; 794 795 dev_queue_xmit(skb); 796 797 return 0; 798 } 799 800 /** 801 * ad_marker_send - send marker information/response on a given port 802 * @port: the port we're looking at 803 * @marker: marker data to send 804 * 805 * Returns: 0 on success 806 * < 0 on error 807 */ 808 static int ad_marker_send(struct port *port, struct bond_marker *marker) 809 { 810 struct slave *slave = port->slave; 811 struct sk_buff *skb; 812 struct bond_marker_header *marker_header; 813 int length = sizeof(struct bond_marker_header); 814 815 skb = dev_alloc_skb(length + 16); 816 if (!skb) 817 return -ENOMEM; 818 819 skb_reserve(skb, 16); 820 821 skb->dev = slave->dev; 822 skb_reset_mac_header(skb); 823 skb->network_header = skb->mac_header + ETH_HLEN; 824 skb->protocol = PKT_TYPE_LACPDU; 825 826 marker_header = (struct bond_marker_header *)skb_put(skb, length); 827 828 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 829 /* Note: source address is set to be the member's PERMANENT address, 830 * because we use it to identify loopback MARKERs in receive. 831 */ 832 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 833 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 834 835 marker_header->marker = *marker; 836 837 dev_queue_xmit(skb); 838 839 return 0; 840 } 841 842 /** 843 * ad_mux_machine - handle a port's mux state machine 844 * @port: the port we're looking at 845 * @update_slave_arr: Does slave array need update? 846 */ 847 static void ad_mux_machine(struct port *port, bool *update_slave_arr) 848 { 849 mux_states_t last_state; 850 851 /* keep current State Machine state to compare later if it was 852 * changed 853 */ 854 last_state = port->sm_mux_state; 855 856 if (port->sm_vars & AD_PORT_BEGIN) { 857 port->sm_mux_state = AD_MUX_DETACHED; 858 } else { 859 switch (port->sm_mux_state) { 860 case AD_MUX_DETACHED: 861 if ((port->sm_vars & AD_PORT_SELECTED) 862 || (port->sm_vars & AD_PORT_STANDBY)) 863 /* if SELECTED or STANDBY */ 864 port->sm_mux_state = AD_MUX_WAITING; 865 break; 866 case AD_MUX_WAITING: 867 /* if SELECTED == FALSE return to DETACH state */ 868 if (!(port->sm_vars & AD_PORT_SELECTED)) { 869 port->sm_vars &= ~AD_PORT_READY_N; 870 /* in order to withhold the Selection Logic to 871 * check all ports READY_N value every callback 872 * cycle to update ready variable, we check 873 * READY_N and update READY here 874 */ 875 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 876 port->sm_mux_state = AD_MUX_DETACHED; 877 break; 878 } 879 880 /* check if the wait_while_timer expired */ 881 if (port->sm_mux_timer_counter 882 && !(--port->sm_mux_timer_counter)) 883 port->sm_vars |= AD_PORT_READY_N; 884 885 /* in order to withhold the selection logic to check 886 * all ports READY_N value every callback cycle to 887 * update ready variable, we check READY_N and update 888 * READY here 889 */ 890 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 891 892 /* if the wait_while_timer expired, and the port is 893 * in READY state, move to ATTACHED state 894 */ 895 if ((port->sm_vars & AD_PORT_READY) 896 && !port->sm_mux_timer_counter) 897 port->sm_mux_state = AD_MUX_ATTACHED; 898 break; 899 case AD_MUX_ATTACHED: 900 /* check also if agg_select_timer expired (so the 901 * edable port will take place only after this timer) 902 */ 903 if ((port->sm_vars & AD_PORT_SELECTED) && 904 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && 905 !__check_agg_selection_timer(port)) { 906 if (port->aggregator->is_active) 907 port->sm_mux_state = 908 AD_MUX_COLLECTING_DISTRIBUTING; 909 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 910 (port->sm_vars & AD_PORT_STANDBY)) { 911 /* if UNSELECTED or STANDBY */ 912 port->sm_vars &= ~AD_PORT_READY_N; 913 /* in order to withhold the selection logic to 914 * check all ports READY_N value every callback 915 * cycle to update ready variable, we check 916 * READY_N and update READY here 917 */ 918 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 919 port->sm_mux_state = AD_MUX_DETACHED; 920 } else if (port->aggregator->is_active) { 921 port->actor_oper_port_state |= 922 AD_STATE_SYNCHRONIZATION; 923 } 924 break; 925 case AD_MUX_COLLECTING_DISTRIBUTING: 926 if (!(port->sm_vars & AD_PORT_SELECTED) || 927 (port->sm_vars & AD_PORT_STANDBY) || 928 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || 929 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { 930 port->sm_mux_state = AD_MUX_ATTACHED; 931 } else { 932 /* if port state hasn't changed make 933 * sure that a collecting distributing 934 * port in an active aggregator is enabled 935 */ 936 if (port->aggregator && 937 port->aggregator->is_active && 938 !__port_is_enabled(port)) { 939 940 __enable_port(port); 941 } 942 } 943 break; 944 default: 945 break; 946 } 947 } 948 949 /* check if the state machine was changed */ 950 if (port->sm_mux_state != last_state) { 951 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 952 port->actor_port_number, 953 port->slave->dev->name, 954 last_state, 955 port->sm_mux_state); 956 switch (port->sm_mux_state) { 957 case AD_MUX_DETACHED: 958 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 959 ad_disable_collecting_distributing(port, 960 update_slave_arr); 961 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 962 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 963 port->ntt = true; 964 break; 965 case AD_MUX_WAITING: 966 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 967 break; 968 case AD_MUX_ATTACHED: 969 if (port->aggregator->is_active) 970 port->actor_oper_port_state |= 971 AD_STATE_SYNCHRONIZATION; 972 else 973 port->actor_oper_port_state &= 974 ~AD_STATE_SYNCHRONIZATION; 975 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 976 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 977 ad_disable_collecting_distributing(port, 978 update_slave_arr); 979 port->ntt = true; 980 break; 981 case AD_MUX_COLLECTING_DISTRIBUTING: 982 port->actor_oper_port_state |= AD_STATE_COLLECTING; 983 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 984 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 985 ad_enable_collecting_distributing(port, 986 update_slave_arr); 987 port->ntt = true; 988 break; 989 default: 990 break; 991 } 992 } 993 } 994 995 /** 996 * ad_rx_machine - handle a port's rx State Machine 997 * @lacpdu: the lacpdu we've received 998 * @port: the port we're looking at 999 * 1000 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1001 * CURRENT. If timer expired set the state machine in the proper state. 1002 * In other cases, this function checks if we need to switch to other state. 1003 */ 1004 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1005 { 1006 rx_states_t last_state; 1007 1008 /* keep current State Machine state to compare later if it was 1009 * changed 1010 */ 1011 last_state = port->sm_rx_state; 1012 1013 /* check if state machine should change state */ 1014 1015 /* first, check if port was reinitialized */ 1016 if (port->sm_vars & AD_PORT_BEGIN) 1017 port->sm_rx_state = AD_RX_INITIALIZE; 1018 /* check if port is not enabled */ 1019 else if (!(port->sm_vars & AD_PORT_BEGIN) 1020 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) 1021 port->sm_rx_state = AD_RX_PORT_DISABLED; 1022 /* check if new lacpdu arrived */ 1023 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1024 (port->sm_rx_state == AD_RX_DEFAULTED) || 1025 (port->sm_rx_state == AD_RX_CURRENT))) { 1026 port->sm_rx_timer_counter = 0; 1027 port->sm_rx_state = AD_RX_CURRENT; 1028 } else { 1029 /* if timer is on, and if it is expired */ 1030 if (port->sm_rx_timer_counter && 1031 !(--port->sm_rx_timer_counter)) { 1032 switch (port->sm_rx_state) { 1033 case AD_RX_EXPIRED: 1034 port->sm_rx_state = AD_RX_DEFAULTED; 1035 break; 1036 case AD_RX_CURRENT: 1037 port->sm_rx_state = AD_RX_EXPIRED; 1038 break; 1039 default: 1040 break; 1041 } 1042 } else { 1043 /* if no lacpdu arrived and no timer is on */ 1044 switch (port->sm_rx_state) { 1045 case AD_RX_PORT_DISABLED: 1046 if (port->sm_vars & AD_PORT_MOVED) 1047 port->sm_rx_state = AD_RX_INITIALIZE; 1048 else if (port->is_enabled 1049 && (port->sm_vars 1050 & AD_PORT_LACP_ENABLED)) 1051 port->sm_rx_state = AD_RX_EXPIRED; 1052 else if (port->is_enabled 1053 && ((port->sm_vars 1054 & AD_PORT_LACP_ENABLED) == 0)) 1055 port->sm_rx_state = AD_RX_LACP_DISABLED; 1056 break; 1057 default: 1058 break; 1059 1060 } 1061 } 1062 } 1063 1064 /* check if the State machine was changed or new lacpdu arrived */ 1065 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1066 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1067 port->actor_port_number, 1068 port->slave->dev->name, 1069 last_state, 1070 port->sm_rx_state); 1071 switch (port->sm_rx_state) { 1072 case AD_RX_INITIALIZE: 1073 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1074 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1075 else 1076 port->sm_vars |= AD_PORT_LACP_ENABLED; 1077 port->sm_vars &= ~AD_PORT_SELECTED; 1078 __record_default(port); 1079 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1080 port->sm_vars &= ~AD_PORT_MOVED; 1081 port->sm_rx_state = AD_RX_PORT_DISABLED; 1082 1083 /* Fall Through */ 1084 case AD_RX_PORT_DISABLED: 1085 port->sm_vars &= ~AD_PORT_MATCHED; 1086 break; 1087 case AD_RX_LACP_DISABLED: 1088 port->sm_vars &= ~AD_PORT_SELECTED; 1089 __record_default(port); 1090 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1091 port->sm_vars |= AD_PORT_MATCHED; 1092 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1093 break; 1094 case AD_RX_EXPIRED: 1095 /* Reset of the Synchronization flag (Standard 43.4.12) 1096 * This reset cause to disable this port in the 1097 * COLLECTING_DISTRIBUTING state of the mux machine in 1098 * case of EXPIRED even if LINK_DOWN didn't arrive for 1099 * the port. 1100 */ 1101 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1102 port->sm_vars &= ~AD_PORT_MATCHED; 1103 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; 1104 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1105 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1106 break; 1107 case AD_RX_DEFAULTED: 1108 __update_default_selected(port); 1109 __record_default(port); 1110 port->sm_vars |= AD_PORT_MATCHED; 1111 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1112 break; 1113 case AD_RX_CURRENT: 1114 /* detect loopback situation */ 1115 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1116 &(port->actor_system))) { 1117 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" 1118 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1119 port->slave->dev->name); 1120 return; 1121 } 1122 __update_selected(lacpdu, port); 1123 __update_ntt(lacpdu, port); 1124 __record_pdu(lacpdu, port); 1125 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1126 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1127 break; 1128 default: 1129 break; 1130 } 1131 } 1132 } 1133 1134 /** 1135 * ad_tx_machine - handle a port's tx state machine 1136 * @port: the port we're looking at 1137 */ 1138 static void ad_tx_machine(struct port *port) 1139 { 1140 /* check if tx timer expired, to verify that we do not send more than 1141 * 3 packets per second 1142 */ 1143 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1144 /* check if there is something to send */ 1145 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1146 __update_lacpdu_from_port(port); 1147 1148 if (ad_lacpdu_send(port) >= 0) { 1149 pr_debug("Sent LACPDU on port %d\n", 1150 port->actor_port_number); 1151 1152 /* mark ntt as false, so it will not be sent 1153 * again until demanded 1154 */ 1155 port->ntt = false; 1156 } 1157 } 1158 /* restart tx timer(to verify that we will not exceed 1159 * AD_MAX_TX_IN_SECOND 1160 */ 1161 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1162 } 1163 } 1164 1165 /** 1166 * ad_periodic_machine - handle a port's periodic state machine 1167 * @port: the port we're looking at 1168 * 1169 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1170 */ 1171 static void ad_periodic_machine(struct port *port) 1172 { 1173 periodic_states_t last_state; 1174 1175 /* keep current state machine state to compare later if it was changed */ 1176 last_state = port->sm_periodic_state; 1177 1178 /* check if port was reinitialized */ 1179 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1180 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1181 ) { 1182 port->sm_periodic_state = AD_NO_PERIODIC; 1183 } 1184 /* check if state machine should change state */ 1185 else if (port->sm_periodic_timer_counter) { 1186 /* check if periodic state machine expired */ 1187 if (!(--port->sm_periodic_timer_counter)) { 1188 /* if expired then do tx */ 1189 port->sm_periodic_state = AD_PERIODIC_TX; 1190 } else { 1191 /* If not expired, check if there is some new timeout 1192 * parameter from the partner state 1193 */ 1194 switch (port->sm_periodic_state) { 1195 case AD_FAST_PERIODIC: 1196 if (!(port->partner_oper.port_state 1197 & AD_STATE_LACP_TIMEOUT)) 1198 port->sm_periodic_state = AD_SLOW_PERIODIC; 1199 break; 1200 case AD_SLOW_PERIODIC: 1201 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1202 port->sm_periodic_timer_counter = 0; 1203 port->sm_periodic_state = AD_PERIODIC_TX; 1204 } 1205 break; 1206 default: 1207 break; 1208 } 1209 } 1210 } else { 1211 switch (port->sm_periodic_state) { 1212 case AD_NO_PERIODIC: 1213 port->sm_periodic_state = AD_FAST_PERIODIC; 1214 break; 1215 case AD_PERIODIC_TX: 1216 if (!(port->partner_oper.port_state & 1217 AD_STATE_LACP_TIMEOUT)) 1218 port->sm_periodic_state = AD_SLOW_PERIODIC; 1219 else 1220 port->sm_periodic_state = AD_FAST_PERIODIC; 1221 break; 1222 default: 1223 break; 1224 } 1225 } 1226 1227 /* check if the state machine was changed */ 1228 if (port->sm_periodic_state != last_state) { 1229 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1230 port->actor_port_number, last_state, 1231 port->sm_periodic_state); 1232 switch (port->sm_periodic_state) { 1233 case AD_NO_PERIODIC: 1234 port->sm_periodic_timer_counter = 0; 1235 break; 1236 case AD_FAST_PERIODIC: 1237 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1238 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1239 break; 1240 case AD_SLOW_PERIODIC: 1241 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1242 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1243 break; 1244 case AD_PERIODIC_TX: 1245 port->ntt = true; 1246 break; 1247 default: 1248 break; 1249 } 1250 } 1251 } 1252 1253 /** 1254 * ad_port_selection_logic - select aggregation groups 1255 * @port: the port we're looking at 1256 * @update_slave_arr: Does slave array need update? 1257 * 1258 * Select aggregation groups, and assign each port for it's aggregetor. The 1259 * selection logic is called in the inititalization (after all the handshkes), 1260 * and after every lacpdu receive (if selected is off). 1261 */ 1262 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1263 { 1264 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1265 struct port *last_port = NULL, *curr_port; 1266 struct list_head *iter; 1267 struct bonding *bond; 1268 struct slave *slave; 1269 int found = 0; 1270 1271 /* if the port is already Selected, do nothing */ 1272 if (port->sm_vars & AD_PORT_SELECTED) 1273 return; 1274 1275 bond = __get_bond_by_port(port); 1276 1277 /* if the port is connected to other aggregator, detach it */ 1278 if (port->aggregator) { 1279 /* detach the port from its former aggregator */ 1280 temp_aggregator = port->aggregator; 1281 for (curr_port = temp_aggregator->lag_ports; curr_port; 1282 last_port = curr_port, 1283 curr_port = curr_port->next_port_in_aggregator) { 1284 if (curr_port == port) { 1285 temp_aggregator->num_of_ports--; 1286 /* if it is the first port attached to the 1287 * aggregator 1288 */ 1289 if (!last_port) { 1290 temp_aggregator->lag_ports = 1291 port->next_port_in_aggregator; 1292 } else { 1293 /* not the first port attached to the 1294 * aggregator 1295 */ 1296 last_port->next_port_in_aggregator = 1297 port->next_port_in_aggregator; 1298 } 1299 1300 /* clear the port's relations to this 1301 * aggregator 1302 */ 1303 port->aggregator = NULL; 1304 port->next_port_in_aggregator = NULL; 1305 port->actor_port_aggregator_identifier = 0; 1306 1307 netdev_dbg(bond->dev, "Port %d left LAG %d\n", 1308 port->actor_port_number, 1309 temp_aggregator->aggregator_identifier); 1310 /* if the aggregator is empty, clear its 1311 * parameters, and set it ready to be attached 1312 */ 1313 if (!temp_aggregator->lag_ports) 1314 ad_clear_agg(temp_aggregator); 1315 break; 1316 } 1317 } 1318 if (!curr_port) { 1319 /* meaning: the port was related to an aggregator 1320 * but was not on the aggregator port list 1321 */ 1322 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1323 port->slave->bond->dev->name, 1324 port->actor_port_number, 1325 port->slave->dev->name, 1326 port->aggregator->aggregator_identifier); 1327 } 1328 } 1329 /* search on all aggregators for a suitable aggregator for this port */ 1330 bond_for_each_slave(bond, slave, iter) { 1331 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1332 1333 /* keep a free aggregator for later use(if needed) */ 1334 if (!aggregator->lag_ports) { 1335 if (!free_aggregator) 1336 free_aggregator = aggregator; 1337 continue; 1338 } 1339 /* check if current aggregator suits us */ 1340 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1341 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1342 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1343 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1344 ) && 1345 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1346 !aggregator->is_individual) /* but is not individual OR */ 1347 ) 1348 ) { 1349 /* attach to the founded aggregator */ 1350 port->aggregator = aggregator; 1351 port->actor_port_aggregator_identifier = 1352 port->aggregator->aggregator_identifier; 1353 port->next_port_in_aggregator = aggregator->lag_ports; 1354 port->aggregator->num_of_ports++; 1355 aggregator->lag_ports = port; 1356 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", 1357 port->actor_port_number, 1358 port->aggregator->aggregator_identifier); 1359 1360 /* mark this port as selected */ 1361 port->sm_vars |= AD_PORT_SELECTED; 1362 found = 1; 1363 break; 1364 } 1365 } 1366 1367 /* the port couldn't find an aggregator - attach it to a new 1368 * aggregator 1369 */ 1370 if (!found) { 1371 if (free_aggregator) { 1372 /* assign port a new aggregator */ 1373 port->aggregator = free_aggregator; 1374 port->actor_port_aggregator_identifier = 1375 port->aggregator->aggregator_identifier; 1376 1377 /* update the new aggregator's parameters 1378 * if port was responsed from the end-user 1379 */ 1380 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1381 /* if port is full duplex */ 1382 port->aggregator->is_individual = false; 1383 else 1384 port->aggregator->is_individual = true; 1385 1386 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; 1387 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; 1388 port->aggregator->partner_system = 1389 port->partner_oper.system; 1390 port->aggregator->partner_system_priority = 1391 port->partner_oper.system_priority; 1392 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1393 port->aggregator->receive_state = 1; 1394 port->aggregator->transmit_state = 1; 1395 port->aggregator->lag_ports = port; 1396 port->aggregator->num_of_ports++; 1397 1398 /* mark this port as selected */ 1399 port->sm_vars |= AD_PORT_SELECTED; 1400 1401 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", 1402 port->actor_port_number, 1403 port->aggregator->aggregator_identifier); 1404 } else { 1405 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", 1406 port->actor_port_number, port->slave->dev->name); 1407 } 1408 } 1409 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1410 * in all aggregator's ports, else set ready=FALSE in all 1411 * aggregator's ports 1412 */ 1413 __set_agg_ports_ready(port->aggregator, 1414 __agg_ports_are_ready(port->aggregator)); 1415 1416 aggregator = __get_first_agg(port); 1417 ad_agg_selection_logic(aggregator, update_slave_arr); 1418 1419 if (!port->aggregator->is_active) 1420 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1421 } 1422 1423 /* Decide if "agg" is a better choice for the new active aggregator that 1424 * the current best, according to the ad_select policy. 1425 */ 1426 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1427 struct aggregator *curr) 1428 { 1429 /* 0. If no best, select current. 1430 * 1431 * 1. If the current agg is not individual, and the best is 1432 * individual, select current. 1433 * 1434 * 2. If current agg is individual and the best is not, keep best. 1435 * 1436 * 3. Therefore, current and best are both individual or both not 1437 * individual, so: 1438 * 1439 * 3a. If current agg partner replied, and best agg partner did not, 1440 * select current. 1441 * 1442 * 3b. If current agg partner did not reply and best agg partner 1443 * did reply, keep best. 1444 * 1445 * 4. Therefore, current and best both have partner replies or 1446 * both do not, so perform selection policy: 1447 * 1448 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1449 * select by bandwidth. 1450 * 1451 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1452 */ 1453 if (!best) 1454 return curr; 1455 1456 if (!curr->is_individual && best->is_individual) 1457 return curr; 1458 1459 if (curr->is_individual && !best->is_individual) 1460 return best; 1461 1462 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1463 return curr; 1464 1465 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1466 return best; 1467 1468 switch (__get_agg_selection_mode(curr->lag_ports)) { 1469 case BOND_AD_COUNT: 1470 if (curr->num_of_ports > best->num_of_ports) 1471 return curr; 1472 1473 if (curr->num_of_ports < best->num_of_ports) 1474 return best; 1475 1476 /*FALLTHROUGH*/ 1477 case BOND_AD_STABLE: 1478 case BOND_AD_BANDWIDTH: 1479 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1480 return curr; 1481 1482 break; 1483 1484 default: 1485 net_warn_ratelimited("%s: Impossible agg select mode %d\n", 1486 curr->slave->bond->dev->name, 1487 __get_agg_selection_mode(curr->lag_ports)); 1488 break; 1489 } 1490 1491 return best; 1492 } 1493 1494 static int agg_device_up(const struct aggregator *agg) 1495 { 1496 struct port *port = agg->lag_ports; 1497 1498 if (!port) 1499 return 0; 1500 1501 return netif_running(port->slave->dev) && 1502 netif_carrier_ok(port->slave->dev); 1503 } 1504 1505 /** 1506 * ad_agg_selection_logic - select an aggregation group for a team 1507 * @aggregator: the aggregator we're looking at 1508 * @update_slave_arr: Does slave array need update? 1509 * 1510 * It is assumed that only one aggregator may be selected for a team. 1511 * 1512 * The logic of this function is to select the aggregator according to 1513 * the ad_select policy: 1514 * 1515 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1516 * it, and to reselect the active aggregator only if the previous 1517 * aggregator has no more ports related to it. 1518 * 1519 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1520 * bandwidth, and reselect whenever a link state change takes place or the 1521 * set of slaves in the bond changes. 1522 * 1523 * BOND_AD_COUNT: select the aggregator with largest number of ports 1524 * (slaves), and reselect whenever a link state change takes place or the 1525 * set of slaves in the bond changes. 1526 * 1527 * FIXME: this function MUST be called with the first agg in the bond, or 1528 * __get_active_agg() won't work correctly. This function should be better 1529 * called with the bond itself, and retrieve the first agg from it. 1530 */ 1531 static void ad_agg_selection_logic(struct aggregator *agg, 1532 bool *update_slave_arr) 1533 { 1534 struct aggregator *best, *active, *origin; 1535 struct bonding *bond = agg->slave->bond; 1536 struct list_head *iter; 1537 struct slave *slave; 1538 struct port *port; 1539 1540 rcu_read_lock(); 1541 origin = agg; 1542 active = __get_active_agg(agg); 1543 best = (active && agg_device_up(active)) ? active : NULL; 1544 1545 bond_for_each_slave_rcu(bond, slave, iter) { 1546 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1547 1548 agg->is_active = 0; 1549 1550 if (agg->num_of_ports && agg_device_up(agg)) 1551 best = ad_agg_selection_test(best, agg); 1552 } 1553 1554 if (best && 1555 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1556 /* For the STABLE policy, don't replace the old active 1557 * aggregator if it's still active (it has an answering 1558 * partner) or if both the best and active don't have an 1559 * answering partner. 1560 */ 1561 if (active && active->lag_ports && 1562 active->lag_ports->is_enabled && 1563 (__agg_has_partner(active) || 1564 (!__agg_has_partner(active) && 1565 !__agg_has_partner(best)))) { 1566 if (!(!active->actor_oper_aggregator_key && 1567 best->actor_oper_aggregator_key)) { 1568 best = NULL; 1569 active->is_active = 1; 1570 } 1571 } 1572 } 1573 1574 if (best && (best == active)) { 1575 best = NULL; 1576 active->is_active = 1; 1577 } 1578 1579 /* if there is new best aggregator, activate it */ 1580 if (best) { 1581 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1582 best->aggregator_identifier, best->num_of_ports, 1583 best->actor_oper_aggregator_key, 1584 best->partner_oper_aggregator_key, 1585 best->is_individual, best->is_active); 1586 netdev_dbg(bond->dev, "best ports %p slave %p %s\n", 1587 best->lag_ports, best->slave, 1588 best->slave ? best->slave->dev->name : "NULL"); 1589 1590 bond_for_each_slave_rcu(bond, slave, iter) { 1591 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1592 1593 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1594 agg->aggregator_identifier, agg->num_of_ports, 1595 agg->actor_oper_aggregator_key, 1596 agg->partner_oper_aggregator_key, 1597 agg->is_individual, agg->is_active); 1598 } 1599 1600 /* check if any partner replys */ 1601 if (best->is_individual) { 1602 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1603 best->slave ? 1604 best->slave->bond->dev->name : "NULL"); 1605 } 1606 1607 best->is_active = 1; 1608 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", 1609 best->aggregator_identifier); 1610 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1611 best->aggregator_identifier, best->num_of_ports, 1612 best->actor_oper_aggregator_key, 1613 best->partner_oper_aggregator_key, 1614 best->is_individual, best->is_active); 1615 1616 /* disable the ports that were related to the former 1617 * active_aggregator 1618 */ 1619 if (active) { 1620 for (port = active->lag_ports; port; 1621 port = port->next_port_in_aggregator) { 1622 __disable_port(port); 1623 } 1624 } 1625 /* Slave array needs update. */ 1626 *update_slave_arr = true; 1627 } 1628 1629 /* if the selected aggregator is of join individuals 1630 * (partner_system is NULL), enable their ports 1631 */ 1632 active = __get_active_agg(origin); 1633 1634 if (active) { 1635 if (!__agg_has_partner(active)) { 1636 for (port = active->lag_ports; port; 1637 port = port->next_port_in_aggregator) { 1638 __enable_port(port); 1639 } 1640 } 1641 } 1642 1643 rcu_read_unlock(); 1644 1645 bond_3ad_set_carrier(bond); 1646 } 1647 1648 /** 1649 * ad_clear_agg - clear a given aggregator's parameters 1650 * @aggregator: the aggregator we're looking at 1651 */ 1652 static void ad_clear_agg(struct aggregator *aggregator) 1653 { 1654 if (aggregator) { 1655 aggregator->is_individual = false; 1656 aggregator->actor_admin_aggregator_key = 0; 1657 aggregator->actor_oper_aggregator_key = 0; 1658 aggregator->partner_system = null_mac_addr; 1659 aggregator->partner_system_priority = 0; 1660 aggregator->partner_oper_aggregator_key = 0; 1661 aggregator->receive_state = 0; 1662 aggregator->transmit_state = 0; 1663 aggregator->lag_ports = NULL; 1664 aggregator->is_active = 0; 1665 aggregator->num_of_ports = 0; 1666 pr_debug("LAG %d was cleared\n", 1667 aggregator->aggregator_identifier); 1668 } 1669 } 1670 1671 /** 1672 * ad_initialize_agg - initialize a given aggregator's parameters 1673 * @aggregator: the aggregator we're looking at 1674 */ 1675 static void ad_initialize_agg(struct aggregator *aggregator) 1676 { 1677 if (aggregator) { 1678 ad_clear_agg(aggregator); 1679 1680 aggregator->aggregator_mac_address = null_mac_addr; 1681 aggregator->aggregator_identifier = 0; 1682 aggregator->slave = NULL; 1683 } 1684 } 1685 1686 /** 1687 * ad_initialize_port - initialize a given port's parameters 1688 * @aggregator: the aggregator we're looking at 1689 * @lacp_fast: boolean. whether fast periodic should be used 1690 */ 1691 static void ad_initialize_port(struct port *port, int lacp_fast) 1692 { 1693 static const struct port_params tmpl = { 1694 .system_priority = 0xffff, 1695 .key = 1, 1696 .port_number = 1, 1697 .port_priority = 0xff, 1698 .port_state = 1, 1699 }; 1700 static const struct lacpdu lacpdu = { 1701 .subtype = 0x01, 1702 .version_number = 0x01, 1703 .tlv_type_actor_info = 0x01, 1704 .actor_information_length = 0x14, 1705 .tlv_type_partner_info = 0x02, 1706 .partner_information_length = 0x14, 1707 .tlv_type_collector_info = 0x03, 1708 .collector_information_length = 0x10, 1709 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1710 }; 1711 1712 if (port) { 1713 port->actor_port_number = 1; 1714 port->actor_port_priority = 0xff; 1715 port->actor_system = null_mac_addr; 1716 port->actor_system_priority = 0xffff; 1717 port->actor_port_aggregator_identifier = 0; 1718 port->ntt = false; 1719 port->actor_admin_port_key = 1; 1720 port->actor_oper_port_key = 1; 1721 port->actor_admin_port_state = AD_STATE_AGGREGATION | 1722 AD_STATE_LACP_ACTIVITY; 1723 port->actor_oper_port_state = AD_STATE_AGGREGATION | 1724 AD_STATE_LACP_ACTIVITY; 1725 1726 if (lacp_fast) 1727 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1728 1729 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1730 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1731 1732 port->is_enabled = true; 1733 /* private parameters */ 1734 port->sm_vars = 0x3; 1735 port->sm_rx_state = 0; 1736 port->sm_rx_timer_counter = 0; 1737 port->sm_periodic_state = 0; 1738 port->sm_periodic_timer_counter = 0; 1739 port->sm_mux_state = 0; 1740 port->sm_mux_timer_counter = 0; 1741 port->sm_tx_state = 0; 1742 port->sm_tx_timer_counter = 0; 1743 port->slave = NULL; 1744 port->aggregator = NULL; 1745 port->next_port_in_aggregator = NULL; 1746 port->transaction_id = 0; 1747 1748 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1749 } 1750 } 1751 1752 /** 1753 * ad_enable_collecting_distributing - enable a port's transmit/receive 1754 * @port: the port we're looking at 1755 * @update_slave_arr: Does slave array need update? 1756 * 1757 * Enable @port if it's in an active aggregator 1758 */ 1759 static void ad_enable_collecting_distributing(struct port *port, 1760 bool *update_slave_arr) 1761 { 1762 if (port->aggregator->is_active) { 1763 pr_debug("Enabling port %d(LAG %d)\n", 1764 port->actor_port_number, 1765 port->aggregator->aggregator_identifier); 1766 __enable_port(port); 1767 /* Slave array needs update */ 1768 *update_slave_arr = true; 1769 } 1770 } 1771 1772 /** 1773 * ad_disable_collecting_distributing - disable a port's transmit/receive 1774 * @port: the port we're looking at 1775 * @update_slave_arr: Does slave array need update? 1776 */ 1777 static void ad_disable_collecting_distributing(struct port *port, 1778 bool *update_slave_arr) 1779 { 1780 if (port->aggregator && 1781 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1782 &(null_mac_addr))) { 1783 pr_debug("Disabling port %d(LAG %d)\n", 1784 port->actor_port_number, 1785 port->aggregator->aggregator_identifier); 1786 __disable_port(port); 1787 /* Slave array needs an update */ 1788 *update_slave_arr = true; 1789 } 1790 } 1791 1792 /** 1793 * ad_marker_info_received - handle receive of a Marker information frame 1794 * @marker_info: Marker info received 1795 * @port: the port we're looking at 1796 */ 1797 static void ad_marker_info_received(struct bond_marker *marker_info, 1798 struct port *port) 1799 { 1800 struct bond_marker marker; 1801 1802 /* copy the received marker data to the response marker */ 1803 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1804 /* change the marker subtype to marker response */ 1805 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1806 1807 /* send the marker response */ 1808 if (ad_marker_send(port, &marker) >= 0) { 1809 pr_debug("Sent Marker Response on port %d\n", 1810 port->actor_port_number); 1811 } 1812 } 1813 1814 /** 1815 * ad_marker_response_received - handle receive of a marker response frame 1816 * @marker: marker PDU received 1817 * @port: the port we're looking at 1818 * 1819 * This function does nothing since we decided not to implement send and handle 1820 * response for marker PDU's, in this stage, but only to respond to marker 1821 * information. 1822 */ 1823 static void ad_marker_response_received(struct bond_marker *marker, 1824 struct port *port) 1825 { 1826 marker = NULL; 1827 port = NULL; 1828 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1829 } 1830 1831 /* ========= AD exported functions to the main bonding code ========= */ 1832 1833 /* Check aggregators status in team every T seconds */ 1834 #define AD_AGGREGATOR_SELECTION_TIMER 8 1835 1836 /** 1837 * bond_3ad_initiate_agg_selection - initate aggregator selection 1838 * @bond: bonding struct 1839 * 1840 * Set the aggregation selection timer, to initiate an agg selection in 1841 * the very near future. Called during first initialization, and during 1842 * any down to up transitions of the bond. 1843 */ 1844 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1845 { 1846 BOND_AD_INFO(bond).agg_select_timer = timeout; 1847 } 1848 1849 /** 1850 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1851 * @bond: bonding struct to work on 1852 * @tick_resolution: tick duration (millisecond resolution) 1853 * 1854 * Can be called only after the mac address of the bond is set. 1855 */ 1856 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1857 { 1858 /* check that the bond is not initialized yet */ 1859 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1860 bond->dev->dev_addr)) { 1861 1862 BOND_AD_INFO(bond).aggregator_identifier = 0; 1863 1864 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; 1865 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); 1866 1867 /* initialize how many times this module is called in one 1868 * second (should be about every 100ms) 1869 */ 1870 ad_ticks_per_sec = tick_resolution; 1871 1872 bond_3ad_initiate_agg_selection(bond, 1873 AD_AGGREGATOR_SELECTION_TIMER * 1874 ad_ticks_per_sec); 1875 } 1876 } 1877 1878 /** 1879 * bond_3ad_bind_slave - initialize a slave's port 1880 * @slave: slave struct to work on 1881 * 1882 * Returns: 0 on success 1883 * < 0 on error 1884 */ 1885 void bond_3ad_bind_slave(struct slave *slave) 1886 { 1887 struct bonding *bond = bond_get_bond_by_slave(slave); 1888 struct port *port; 1889 struct aggregator *aggregator; 1890 1891 /* check that the slave has not been initialized yet. */ 1892 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 1893 1894 /* port initialization */ 1895 port = &(SLAVE_AD_INFO(slave)->port); 1896 1897 ad_initialize_port(port, bond->params.lacp_fast); 1898 1899 port->slave = slave; 1900 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 1901 /* key is determined according to the link speed, duplex and user key(which 1902 * is yet not supported) 1903 */ 1904 port->actor_admin_port_key = 0; 1905 port->actor_admin_port_key |= __get_duplex(port); 1906 port->actor_admin_port_key |= (__get_link_speed(port) << 1); 1907 port->actor_oper_port_key = port->actor_admin_port_key; 1908 /* if the port is not full duplex, then the port should be not 1909 * lacp Enabled 1910 */ 1911 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1912 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1913 /* actor system is the bond's system */ 1914 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 1915 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 1916 * lacpdu's are sent in one second) 1917 */ 1918 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1919 port->aggregator = NULL; 1920 port->next_port_in_aggregator = NULL; 1921 1922 __disable_port(port); 1923 1924 /* aggregator initialization */ 1925 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1926 1927 ad_initialize_agg(aggregator); 1928 1929 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 1930 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 1931 aggregator->slave = slave; 1932 aggregator->is_active = 0; 1933 aggregator->num_of_ports = 0; 1934 } 1935 } 1936 1937 /** 1938 * bond_3ad_unbind_slave - deinitialize a slave's port 1939 * @slave: slave struct to work on 1940 * 1941 * Search for the aggregator that is related to this port, remove the 1942 * aggregator and assign another aggregator for other port related to it 1943 * (if any), and remove the port. 1944 */ 1945 void bond_3ad_unbind_slave(struct slave *slave) 1946 { 1947 struct port *port, *prev_port, *temp_port; 1948 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 1949 int select_new_active_agg = 0; 1950 struct bonding *bond = slave->bond; 1951 struct slave *slave_iter; 1952 struct list_head *iter; 1953 bool dummy_slave_update; /* Ignore this value as caller updates array */ 1954 1955 /* Sync against bond_3ad_state_machine_handler() */ 1956 spin_lock_bh(&bond->mode_lock); 1957 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1958 port = &(SLAVE_AD_INFO(slave)->port); 1959 1960 /* if slave is null, the whole port is not initialized */ 1961 if (!port->slave) { 1962 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", 1963 slave->dev->name); 1964 goto out; 1965 } 1966 1967 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", 1968 aggregator->aggregator_identifier); 1969 1970 /* Tell the partner that this port is not suitable for aggregation */ 1971 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 1972 __update_lacpdu_from_port(port); 1973 ad_lacpdu_send(port); 1974 1975 /* check if this aggregator is occupied */ 1976 if (aggregator->lag_ports) { 1977 /* check if there are other ports related to this aggregator 1978 * except the port related to this slave(thats ensure us that 1979 * there is a reason to search for new aggregator, and that we 1980 * will find one 1981 */ 1982 if ((aggregator->lag_ports != port) || 1983 (aggregator->lag_ports->next_port_in_aggregator)) { 1984 /* find new aggregator for the related port(s) */ 1985 bond_for_each_slave(bond, slave_iter, iter) { 1986 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 1987 /* if the new aggregator is empty, or it is 1988 * connected to our port only 1989 */ 1990 if (!new_aggregator->lag_ports || 1991 ((new_aggregator->lag_ports == port) && 1992 !new_aggregator->lag_ports->next_port_in_aggregator)) 1993 break; 1994 } 1995 if (!slave_iter) 1996 new_aggregator = NULL; 1997 1998 /* if new aggregator found, copy the aggregator's 1999 * parameters and connect the related lag_ports to the 2000 * new aggregator 2001 */ 2002 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2003 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2004 aggregator->aggregator_identifier, 2005 new_aggregator->aggregator_identifier); 2006 2007 if ((new_aggregator->lag_ports == port) && 2008 new_aggregator->is_active) { 2009 netdev_info(bond->dev, "Removing an active aggregator\n"); 2010 select_new_active_agg = 1; 2011 } 2012 2013 new_aggregator->is_individual = aggregator->is_individual; 2014 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2015 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2016 new_aggregator->partner_system = aggregator->partner_system; 2017 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2018 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2019 new_aggregator->receive_state = aggregator->receive_state; 2020 new_aggregator->transmit_state = aggregator->transmit_state; 2021 new_aggregator->lag_ports = aggregator->lag_ports; 2022 new_aggregator->is_active = aggregator->is_active; 2023 new_aggregator->num_of_ports = aggregator->num_of_ports; 2024 2025 /* update the information that is written on 2026 * the ports about the aggregator 2027 */ 2028 for (temp_port = aggregator->lag_ports; temp_port; 2029 temp_port = temp_port->next_port_in_aggregator) { 2030 temp_port->aggregator = new_aggregator; 2031 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2032 } 2033 2034 ad_clear_agg(aggregator); 2035 2036 if (select_new_active_agg) 2037 ad_agg_selection_logic(__get_first_agg(port), 2038 &dummy_slave_update); 2039 } else { 2040 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2041 } 2042 } else { 2043 /* in case that the only port related to this 2044 * aggregator is the one we want to remove 2045 */ 2046 select_new_active_agg = aggregator->is_active; 2047 ad_clear_agg(aggregator); 2048 if (select_new_active_agg) { 2049 netdev_info(bond->dev, "Removing an active aggregator\n"); 2050 /* select new active aggregator */ 2051 temp_aggregator = __get_first_agg(port); 2052 if (temp_aggregator) 2053 ad_agg_selection_logic(temp_aggregator, 2054 &dummy_slave_update); 2055 } 2056 } 2057 } 2058 2059 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); 2060 2061 /* find the aggregator that this port is connected to */ 2062 bond_for_each_slave(bond, slave_iter, iter) { 2063 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2064 prev_port = NULL; 2065 /* search the port in the aggregator's related ports */ 2066 for (temp_port = temp_aggregator->lag_ports; temp_port; 2067 prev_port = temp_port, 2068 temp_port = temp_port->next_port_in_aggregator) { 2069 if (temp_port == port) { 2070 /* the aggregator found - detach the port from 2071 * this aggregator 2072 */ 2073 if (prev_port) 2074 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2075 else 2076 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2077 temp_aggregator->num_of_ports--; 2078 if (temp_aggregator->num_of_ports == 0) { 2079 select_new_active_agg = temp_aggregator->is_active; 2080 ad_clear_agg(temp_aggregator); 2081 if (select_new_active_agg) { 2082 netdev_info(bond->dev, "Removing an active aggregator\n"); 2083 /* select new active aggregator */ 2084 ad_agg_selection_logic(__get_first_agg(port), 2085 &dummy_slave_update); 2086 } 2087 } 2088 break; 2089 } 2090 } 2091 } 2092 port->slave = NULL; 2093 2094 out: 2095 spin_unlock_bh(&bond->mode_lock); 2096 } 2097 2098 /** 2099 * bond_3ad_state_machine_handler - handle state machines timeout 2100 * @bond: bonding struct to work on 2101 * 2102 * The state machine handling concept in this module is to check every tick 2103 * which state machine should operate any function. The execution order is 2104 * round robin, so when we have an interaction between state machines, the 2105 * reply of one to each other might be delayed until next tick. 2106 * 2107 * This function also complete the initialization when the agg_select_timer 2108 * times out, and it selects an aggregator for the ports that are yet not 2109 * related to any aggregator, and selects the active aggregator for a bond. 2110 */ 2111 void bond_3ad_state_machine_handler(struct work_struct *work) 2112 { 2113 struct bonding *bond = container_of(work, struct bonding, 2114 ad_work.work); 2115 struct aggregator *aggregator; 2116 struct list_head *iter; 2117 struct slave *slave; 2118 struct port *port; 2119 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2120 bool update_slave_arr = false; 2121 2122 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2123 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2124 * concurrently due to incoming LACPDU as well. 2125 */ 2126 spin_lock_bh(&bond->mode_lock); 2127 rcu_read_lock(); 2128 2129 /* check if there are any slaves */ 2130 if (!bond_has_slaves(bond)) 2131 goto re_arm; 2132 2133 /* check if agg_select_timer timer after initialize is timed out */ 2134 if (BOND_AD_INFO(bond).agg_select_timer && 2135 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2136 slave = bond_first_slave_rcu(bond); 2137 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2138 2139 /* select the active aggregator for the bond */ 2140 if (port) { 2141 if (!port->slave) { 2142 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2143 bond->dev->name); 2144 goto re_arm; 2145 } 2146 2147 aggregator = __get_first_agg(port); 2148 ad_agg_selection_logic(aggregator, &update_slave_arr); 2149 } 2150 bond_3ad_set_carrier(bond); 2151 } 2152 2153 /* for each port run the state machines */ 2154 bond_for_each_slave_rcu(bond, slave, iter) { 2155 port = &(SLAVE_AD_INFO(slave)->port); 2156 if (!port->slave) { 2157 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2158 bond->dev->name); 2159 goto re_arm; 2160 } 2161 2162 ad_rx_machine(NULL, port); 2163 ad_periodic_machine(port); 2164 ad_port_selection_logic(port, &update_slave_arr); 2165 ad_mux_machine(port, &update_slave_arr); 2166 ad_tx_machine(port); 2167 2168 /* turn off the BEGIN bit, since we already handled it */ 2169 if (port->sm_vars & AD_PORT_BEGIN) 2170 port->sm_vars &= ~AD_PORT_BEGIN; 2171 } 2172 2173 re_arm: 2174 bond_for_each_slave_rcu(bond, slave, iter) { 2175 if (slave->should_notify) { 2176 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2177 break; 2178 } 2179 } 2180 rcu_read_unlock(); 2181 spin_unlock_bh(&bond->mode_lock); 2182 2183 if (update_slave_arr) 2184 bond_slave_arr_work_rearm(bond, 0); 2185 2186 if (should_notify_rtnl && rtnl_trylock()) { 2187 bond_slave_state_notify(bond); 2188 rtnl_unlock(); 2189 } 2190 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2191 } 2192 2193 /** 2194 * bond_3ad_rx_indication - handle a received frame 2195 * @lacpdu: received lacpdu 2196 * @slave: slave struct to work on 2197 * @length: length of the data received 2198 * 2199 * It is assumed that frames that were sent on this NIC don't returned as new 2200 * received frames (loopback). Since only the payload is given to this 2201 * function, it check for loopback. 2202 */ 2203 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, 2204 u16 length) 2205 { 2206 struct port *port; 2207 int ret = RX_HANDLER_ANOTHER; 2208 2209 if (length >= sizeof(struct lacpdu)) { 2210 2211 port = &(SLAVE_AD_INFO(slave)->port); 2212 2213 if (!port->slave) { 2214 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2215 slave->dev->name, slave->bond->dev->name); 2216 return ret; 2217 } 2218 2219 switch (lacpdu->subtype) { 2220 case AD_TYPE_LACPDU: 2221 ret = RX_HANDLER_CONSUMED; 2222 netdev_dbg(slave->bond->dev, 2223 "Received LACPDU on port %d slave %s\n", 2224 port->actor_port_number, 2225 slave->dev->name); 2226 /* Protect against concurrent state machines */ 2227 spin_lock(&slave->bond->mode_lock); 2228 ad_rx_machine(lacpdu, port); 2229 spin_unlock(&slave->bond->mode_lock); 2230 break; 2231 2232 case AD_TYPE_MARKER: 2233 ret = RX_HANDLER_CONSUMED; 2234 /* No need to convert fields to Little Endian since we 2235 * don't use the marker's fields. 2236 */ 2237 2238 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2239 case AD_MARKER_INFORMATION_SUBTYPE: 2240 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", 2241 port->actor_port_number); 2242 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2243 break; 2244 2245 case AD_MARKER_RESPONSE_SUBTYPE: 2246 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", 2247 port->actor_port_number); 2248 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2249 break; 2250 2251 default: 2252 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", 2253 port->actor_port_number); 2254 } 2255 } 2256 } 2257 return ret; 2258 } 2259 2260 /** 2261 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication 2262 * @slave: slave struct to work on 2263 * 2264 * Handle reselection of aggregator (if needed) for this port. 2265 */ 2266 void bond_3ad_adapter_speed_changed(struct slave *slave) 2267 { 2268 struct port *port; 2269 2270 port = &(SLAVE_AD_INFO(slave)->port); 2271 2272 /* if slave is null, the whole port is not initialized */ 2273 if (!port->slave) { 2274 netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n", 2275 slave->dev->name); 2276 return; 2277 } 2278 2279 spin_lock_bh(&slave->bond->mode_lock); 2280 2281 port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS; 2282 port->actor_oper_port_key = port->actor_admin_port_key |= 2283 (__get_link_speed(port) << 1); 2284 netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number); 2285 /* there is no need to reselect a new aggregator, just signal the 2286 * state machines to reinitialize 2287 */ 2288 port->sm_vars |= AD_PORT_BEGIN; 2289 2290 spin_unlock_bh(&slave->bond->mode_lock); 2291 } 2292 2293 /** 2294 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication 2295 * @slave: slave struct to work on 2296 * 2297 * Handle reselection of aggregator (if needed) for this port. 2298 */ 2299 void bond_3ad_adapter_duplex_changed(struct slave *slave) 2300 { 2301 struct port *port; 2302 2303 port = &(SLAVE_AD_INFO(slave)->port); 2304 2305 /* if slave is null, the whole port is not initialized */ 2306 if (!port->slave) { 2307 netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n", 2308 slave->dev->name); 2309 return; 2310 } 2311 2312 spin_lock_bh(&slave->bond->mode_lock); 2313 2314 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS; 2315 port->actor_oper_port_key = port->actor_admin_port_key |= 2316 __get_duplex(port); 2317 netdev_dbg(slave->bond->dev, "Port %d slave %s changed duplex\n", 2318 port->actor_port_number, slave->dev->name); 2319 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 2320 port->sm_vars |= AD_PORT_LACP_ENABLED; 2321 /* there is no need to reselect a new aggregator, just signal the 2322 * state machines to reinitialize 2323 */ 2324 port->sm_vars |= AD_PORT_BEGIN; 2325 2326 spin_unlock_bh(&slave->bond->mode_lock); 2327 } 2328 2329 /** 2330 * bond_3ad_handle_link_change - handle a slave's link status change indication 2331 * @slave: slave struct to work on 2332 * @status: whether the link is now up or down 2333 * 2334 * Handle reselection of aggregator (if needed) for this port. 2335 */ 2336 void bond_3ad_handle_link_change(struct slave *slave, char link) 2337 { 2338 struct port *port; 2339 2340 port = &(SLAVE_AD_INFO(slave)->port); 2341 2342 /* if slave is null, the whole port is not initialized */ 2343 if (!port->slave) { 2344 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", 2345 slave->dev->name); 2346 return; 2347 } 2348 2349 spin_lock_bh(&slave->bond->mode_lock); 2350 /* on link down we are zeroing duplex and speed since 2351 * some of the adaptors(ce1000.lan) report full duplex/speed 2352 * instead of N/A(duplex) / 0(speed). 2353 * 2354 * on link up we are forcing recheck on the duplex and speed since 2355 * some of he adaptors(ce1000.lan) report. 2356 */ 2357 if (link == BOND_LINK_UP) { 2358 port->is_enabled = true; 2359 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS; 2360 port->actor_oper_port_key = port->actor_admin_port_key |= 2361 __get_duplex(port); 2362 port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS; 2363 port->actor_oper_port_key = port->actor_admin_port_key |= 2364 (__get_link_speed(port) << 1); 2365 } else { 2366 /* link has failed */ 2367 port->is_enabled = false; 2368 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS; 2369 port->actor_oper_port_key = (port->actor_admin_port_key &= 2370 ~AD_SPEED_KEY_MASKS); 2371 } 2372 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", 2373 port->actor_port_number, 2374 link == BOND_LINK_UP ? "UP" : "DOWN"); 2375 /* there is no need to reselect a new aggregator, just signal the 2376 * state machines to reinitialize 2377 */ 2378 port->sm_vars |= AD_PORT_BEGIN; 2379 2380 spin_unlock_bh(&slave->bond->mode_lock); 2381 2382 /* RTNL is held and mode_lock is released so it's safe 2383 * to update slave_array here. 2384 */ 2385 bond_update_slave_arr(slave->bond, NULL); 2386 } 2387 2388 /** 2389 * bond_3ad_set_carrier - set link state for bonding master 2390 * @bond - bonding structure 2391 * 2392 * if we have an active aggregator, we're up, if not, we're down. 2393 * Presumes that we cannot have an active aggregator if there are 2394 * no slaves with link up. 2395 * 2396 * This behavior complies with IEEE 802.3 section 43.3.9. 2397 * 2398 * Called by bond_set_carrier(). Return zero if carrier state does not 2399 * change, nonzero if it does. 2400 */ 2401 int bond_3ad_set_carrier(struct bonding *bond) 2402 { 2403 struct aggregator *active; 2404 struct slave *first_slave; 2405 int ret = 1; 2406 2407 rcu_read_lock(); 2408 first_slave = bond_first_slave_rcu(bond); 2409 if (!first_slave) { 2410 ret = 0; 2411 goto out; 2412 } 2413 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2414 if (active) { 2415 /* are enough slaves available to consider link up? */ 2416 if (active->num_of_ports < bond->params.min_links) { 2417 if (netif_carrier_ok(bond->dev)) { 2418 netif_carrier_off(bond->dev); 2419 goto out; 2420 } 2421 } else if (!netif_carrier_ok(bond->dev)) { 2422 netif_carrier_on(bond->dev); 2423 goto out; 2424 } 2425 } else if (netif_carrier_ok(bond->dev)) { 2426 netif_carrier_off(bond->dev); 2427 } 2428 out: 2429 rcu_read_unlock(); 2430 return ret; 2431 } 2432 2433 /** 2434 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2435 * @bond: bonding struct to work on 2436 * @ad_info: ad_info struct to fill with the bond's info 2437 * 2438 * Returns: 0 on success 2439 * < 0 on error 2440 */ 2441 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2442 struct ad_info *ad_info) 2443 { 2444 struct aggregator *aggregator = NULL; 2445 struct list_head *iter; 2446 struct slave *slave; 2447 struct port *port; 2448 2449 bond_for_each_slave_rcu(bond, slave, iter) { 2450 port = &(SLAVE_AD_INFO(slave)->port); 2451 if (port->aggregator && port->aggregator->is_active) { 2452 aggregator = port->aggregator; 2453 break; 2454 } 2455 } 2456 2457 if (!aggregator) 2458 return -1; 2459 2460 ad_info->aggregator_id = aggregator->aggregator_identifier; 2461 ad_info->ports = aggregator->num_of_ports; 2462 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2463 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2464 ether_addr_copy(ad_info->partner_system, 2465 aggregator->partner_system.mac_addr_value); 2466 return 0; 2467 } 2468 2469 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2470 { 2471 int ret; 2472 2473 rcu_read_lock(); 2474 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2475 rcu_read_unlock(); 2476 2477 return ret; 2478 } 2479 2480 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2481 struct slave *slave) 2482 { 2483 struct lacpdu *lacpdu, _lacpdu; 2484 2485 if (skb->protocol != PKT_TYPE_LACPDU) 2486 return RX_HANDLER_ANOTHER; 2487 2488 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2489 if (!lacpdu) 2490 return RX_HANDLER_ANOTHER; 2491 2492 return bond_3ad_rx_indication(lacpdu, slave, skb->len); 2493 } 2494 2495 /** 2496 * bond_3ad_update_lacp_rate - change the lacp rate 2497 * @bond - bonding struct 2498 * 2499 * When modify lacp_rate parameter via sysfs, 2500 * update actor_oper_port_state of each port. 2501 * 2502 * Hold bond->mode_lock, 2503 * so we can modify port->actor_oper_port_state, 2504 * no matter bond is up or down. 2505 */ 2506 void bond_3ad_update_lacp_rate(struct bonding *bond) 2507 { 2508 struct port *port = NULL; 2509 struct list_head *iter; 2510 struct slave *slave; 2511 int lacp_fast; 2512 2513 lacp_fast = bond->params.lacp_fast; 2514 spin_lock_bh(&bond->mode_lock); 2515 bond_for_each_slave(bond, slave, iter) { 2516 port = &(SLAVE_AD_INFO(slave)->port); 2517 if (lacp_fast) 2518 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2519 else 2520 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2521 } 2522 spin_unlock_bh(&bond->mode_lock); 2523 } 2524