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 #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN) 74 75 /* Port Key definitions 76 * key is determined according to the link speed, duplex and 77 * user key (which is yet not supported) 78 * -------------------------------------------------------------- 79 * Port key | User key (10 bits) | Speed (5 bits) | Duplex| 80 * -------------------------------------------------------------- 81 * |15 6|5 1|0 82 */ 83 #define AD_DUPLEX_KEY_MASKS 0x1 84 #define AD_SPEED_KEY_MASKS 0x3E 85 #define AD_USER_KEY_MASKS 0xFFC0 86 87 enum ad_link_speed_type { 88 AD_LINK_SPEED_1MBPS = 1, 89 AD_LINK_SPEED_10MBPS, 90 AD_LINK_SPEED_100MBPS, 91 AD_LINK_SPEED_1000MBPS, 92 AD_LINK_SPEED_2500MBPS, 93 AD_LINK_SPEED_10000MBPS, 94 AD_LINK_SPEED_20000MBPS, 95 AD_LINK_SPEED_40000MBPS, 96 AD_LINK_SPEED_56000MBPS 97 }; 98 99 /* compare MAC addresses */ 100 #define MAC_ADDRESS_EQUAL(A, B) \ 101 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 102 103 static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; 104 static u16 ad_ticks_per_sec; 105 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 106 107 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; 108 109 /* ================= main 802.3ad protocol functions ================== */ 110 static int ad_lacpdu_send(struct port *port); 111 static int ad_marker_send(struct port *port, struct bond_marker *marker); 112 static void ad_mux_machine(struct port *port, bool *update_slave_arr); 113 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 114 static void ad_tx_machine(struct port *port); 115 static void ad_periodic_machine(struct port *port); 116 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 117 static void ad_agg_selection_logic(struct aggregator *aggregator, 118 bool *update_slave_arr); 119 static void ad_clear_agg(struct aggregator *aggregator); 120 static void ad_initialize_agg(struct aggregator *aggregator); 121 static void ad_initialize_port(struct port *port, int lacp_fast); 122 static void ad_enable_collecting_distributing(struct port *port, 123 bool *update_slave_arr); 124 static void ad_disable_collecting_distributing(struct port *port, 125 bool *update_slave_arr); 126 static void ad_marker_info_received(struct bond_marker *marker_info, 127 struct port *port); 128 static void ad_marker_response_received(struct bond_marker *marker, 129 struct port *port); 130 static void ad_update_actor_keys(struct port *port, bool reset); 131 132 133 /* ================= api to bonding and kernel code ================== */ 134 135 /** 136 * __get_bond_by_port - get the port's bonding struct 137 * @port: the port we're looking at 138 * 139 * Return @port's bonding struct, or %NULL if it can't be found. 140 */ 141 static inline struct bonding *__get_bond_by_port(struct port *port) 142 { 143 if (port->slave == NULL) 144 return NULL; 145 146 return bond_get_bond_by_slave(port->slave); 147 } 148 149 /** 150 * __get_first_agg - get the first aggregator in the bond 151 * @bond: the bond we're looking at 152 * 153 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 154 * found. 155 * The caller must hold RCU or RTNL lock. 156 */ 157 static inline struct aggregator *__get_first_agg(struct port *port) 158 { 159 struct bonding *bond = __get_bond_by_port(port); 160 struct slave *first_slave; 161 struct aggregator *agg; 162 163 /* If there's no bond for this port, or bond has no slaves */ 164 if (bond == NULL) 165 return NULL; 166 167 rcu_read_lock(); 168 first_slave = bond_first_slave_rcu(bond); 169 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 170 rcu_read_unlock(); 171 172 return agg; 173 } 174 175 /** 176 * __agg_has_partner - see if we have a partner 177 * @agg: the agregator we're looking at 178 * 179 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 180 * address for the partner). Return 0 if not. 181 */ 182 static inline int __agg_has_partner(struct aggregator *agg) 183 { 184 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 185 } 186 187 /** 188 * __disable_port - disable the port's slave 189 * @port: the port we're looking at 190 */ 191 static inline void __disable_port(struct port *port) 192 { 193 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 194 } 195 196 /** 197 * __enable_port - enable the port's slave, if it's up 198 * @port: the port we're looking at 199 */ 200 static inline void __enable_port(struct port *port) 201 { 202 struct slave *slave = port->slave; 203 204 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 205 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 206 } 207 208 /** 209 * __port_is_enabled - check if the port's slave is in active state 210 * @port: the port we're looking at 211 */ 212 static inline int __port_is_enabled(struct port *port) 213 { 214 return bond_is_active_slave(port->slave); 215 } 216 217 /** 218 * __get_agg_selection_mode - get the aggregator selection mode 219 * @port: the port we're looking at 220 * 221 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 222 */ 223 static inline u32 __get_agg_selection_mode(struct port *port) 224 { 225 struct bonding *bond = __get_bond_by_port(port); 226 227 if (bond == NULL) 228 return BOND_AD_STABLE; 229 230 return bond->params.ad_select; 231 } 232 233 /** 234 * __check_agg_selection_timer - check if the selection timer has expired 235 * @port: the port we're looking at 236 */ 237 static inline int __check_agg_selection_timer(struct port *port) 238 { 239 struct bonding *bond = __get_bond_by_port(port); 240 241 if (bond == NULL) 242 return 0; 243 244 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 245 } 246 247 /** 248 * __get_link_speed - get a port's speed 249 * @port: the port we're looking at 250 * 251 * Return @port's speed in 802.3ad enum format. i.e. one of: 252 * 0, 253 * %AD_LINK_SPEED_10MBPS, 254 * %AD_LINK_SPEED_100MBPS, 255 * %AD_LINK_SPEED_1000MBPS, 256 * %AD_LINK_SPEED_2500MBPS, 257 * %AD_LINK_SPEED_10000MBPS 258 * %AD_LINK_SPEED_20000MBPS 259 * %AD_LINK_SPEED_40000MBPS 260 * %AD_LINK_SPEED_56000MBPS 261 */ 262 static u16 __get_link_speed(struct port *port) 263 { 264 struct slave *slave = port->slave; 265 u16 speed; 266 267 /* this if covers only a special case: when the configuration starts 268 * with link down, it sets the speed to 0. 269 * This is done in spite of the fact that the e100 driver reports 0 270 * to be compatible with MVT in the future. 271 */ 272 if (slave->link != BOND_LINK_UP) 273 speed = 0; 274 else { 275 switch (slave->speed) { 276 case SPEED_10: 277 speed = AD_LINK_SPEED_10MBPS; 278 break; 279 280 case SPEED_100: 281 speed = AD_LINK_SPEED_100MBPS; 282 break; 283 284 case SPEED_1000: 285 speed = AD_LINK_SPEED_1000MBPS; 286 break; 287 288 case SPEED_2500: 289 speed = AD_LINK_SPEED_2500MBPS; 290 break; 291 292 case SPEED_10000: 293 speed = AD_LINK_SPEED_10000MBPS; 294 break; 295 296 case SPEED_20000: 297 speed = AD_LINK_SPEED_20000MBPS; 298 break; 299 300 case SPEED_40000: 301 speed = AD_LINK_SPEED_40000MBPS; 302 break; 303 304 case SPEED_56000: 305 speed = AD_LINK_SPEED_56000MBPS; 306 break; 307 308 default: 309 /* unknown speed value from ethtool. shouldn't happen */ 310 speed = 0; 311 break; 312 } 313 } 314 315 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", 316 port->actor_port_number, speed); 317 return speed; 318 } 319 320 /** 321 * __get_duplex - get a port's duplex 322 * @port: the port we're looking at 323 * 324 * Return @port's duplex in 802.3ad bitmask format. i.e.: 325 * 0x01 if in full duplex 326 * 0x00 otherwise 327 */ 328 static u8 __get_duplex(struct port *port) 329 { 330 struct slave *slave = port->slave; 331 u8 retval = 0x0; 332 333 /* handling a special case: when the configuration starts with 334 * link down, it sets the duplex to 0. 335 */ 336 if (slave->link == BOND_LINK_UP) { 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 port->sm_vars |= AD_PORT_CHURNED; 1019 /* check if port is not enabled */ 1020 } else if (!(port->sm_vars & AD_PORT_BEGIN) 1021 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) 1022 port->sm_rx_state = AD_RX_PORT_DISABLED; 1023 /* check if new lacpdu arrived */ 1024 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1025 (port->sm_rx_state == AD_RX_DEFAULTED) || 1026 (port->sm_rx_state == AD_RX_CURRENT))) { 1027 if (port->sm_rx_state != AD_RX_CURRENT) 1028 port->sm_vars |= AD_PORT_CHURNED; 1029 port->sm_rx_timer_counter = 0; 1030 port->sm_rx_state = AD_RX_CURRENT; 1031 } else { 1032 /* if timer is on, and if it is expired */ 1033 if (port->sm_rx_timer_counter && 1034 !(--port->sm_rx_timer_counter)) { 1035 switch (port->sm_rx_state) { 1036 case AD_RX_EXPIRED: 1037 port->sm_rx_state = AD_RX_DEFAULTED; 1038 break; 1039 case AD_RX_CURRENT: 1040 port->sm_rx_state = AD_RX_EXPIRED; 1041 break; 1042 default: 1043 break; 1044 } 1045 } else { 1046 /* if no lacpdu arrived and no timer is on */ 1047 switch (port->sm_rx_state) { 1048 case AD_RX_PORT_DISABLED: 1049 if (port->sm_vars & AD_PORT_MOVED) 1050 port->sm_rx_state = AD_RX_INITIALIZE; 1051 else if (port->is_enabled 1052 && (port->sm_vars 1053 & AD_PORT_LACP_ENABLED)) 1054 port->sm_rx_state = AD_RX_EXPIRED; 1055 else if (port->is_enabled 1056 && ((port->sm_vars 1057 & AD_PORT_LACP_ENABLED) == 0)) 1058 port->sm_rx_state = AD_RX_LACP_DISABLED; 1059 break; 1060 default: 1061 break; 1062 1063 } 1064 } 1065 } 1066 1067 /* check if the State machine was changed or new lacpdu arrived */ 1068 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1069 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1070 port->actor_port_number, 1071 port->slave->dev->name, 1072 last_state, 1073 port->sm_rx_state); 1074 switch (port->sm_rx_state) { 1075 case AD_RX_INITIALIZE: 1076 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1077 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1078 else 1079 port->sm_vars |= AD_PORT_LACP_ENABLED; 1080 port->sm_vars &= ~AD_PORT_SELECTED; 1081 __record_default(port); 1082 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1083 port->sm_vars &= ~AD_PORT_MOVED; 1084 port->sm_rx_state = AD_RX_PORT_DISABLED; 1085 1086 /* Fall Through */ 1087 case AD_RX_PORT_DISABLED: 1088 port->sm_vars &= ~AD_PORT_MATCHED; 1089 break; 1090 case AD_RX_LACP_DISABLED: 1091 port->sm_vars &= ~AD_PORT_SELECTED; 1092 __record_default(port); 1093 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1094 port->sm_vars |= AD_PORT_MATCHED; 1095 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1096 break; 1097 case AD_RX_EXPIRED: 1098 /* Reset of the Synchronization flag (Standard 43.4.12) 1099 * This reset cause to disable this port in the 1100 * COLLECTING_DISTRIBUTING state of the mux machine in 1101 * case of EXPIRED even if LINK_DOWN didn't arrive for 1102 * the port. 1103 */ 1104 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1105 port->sm_vars &= ~AD_PORT_MATCHED; 1106 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; 1107 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; 1108 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1109 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1110 port->sm_vars |= AD_PORT_CHURNED; 1111 break; 1112 case AD_RX_DEFAULTED: 1113 __update_default_selected(port); 1114 __record_default(port); 1115 port->sm_vars |= AD_PORT_MATCHED; 1116 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1117 break; 1118 case AD_RX_CURRENT: 1119 /* detect loopback situation */ 1120 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1121 &(port->actor_system))) { 1122 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" 1123 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1124 port->slave->dev->name); 1125 return; 1126 } 1127 __update_selected(lacpdu, port); 1128 __update_ntt(lacpdu, port); 1129 __record_pdu(lacpdu, port); 1130 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1131 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1132 break; 1133 default: 1134 break; 1135 } 1136 } 1137 } 1138 1139 /** 1140 * ad_churn_machine - handle port churn's state machine 1141 * @port: the port we're looking at 1142 * 1143 */ 1144 static void ad_churn_machine(struct port *port) 1145 { 1146 if (port->sm_vars & AD_PORT_CHURNED) { 1147 port->sm_vars &= ~AD_PORT_CHURNED; 1148 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1149 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1150 port->sm_churn_actor_timer_counter = 1151 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1152 port->sm_churn_partner_timer_counter = 1153 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1154 return; 1155 } 1156 if (port->sm_churn_actor_timer_counter && 1157 !(--port->sm_churn_actor_timer_counter) && 1158 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1159 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { 1160 port->sm_churn_actor_state = AD_NO_CHURN; 1161 } else { 1162 port->churn_actor_count++; 1163 port->sm_churn_actor_state = AD_CHURN; 1164 } 1165 } 1166 if (port->sm_churn_partner_timer_counter && 1167 !(--port->sm_churn_partner_timer_counter) && 1168 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1169 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { 1170 port->sm_churn_partner_state = AD_NO_CHURN; 1171 } else { 1172 port->churn_partner_count++; 1173 port->sm_churn_partner_state = AD_CHURN; 1174 } 1175 } 1176 } 1177 1178 /** 1179 * ad_tx_machine - handle a port's tx state machine 1180 * @port: the port we're looking at 1181 */ 1182 static void ad_tx_machine(struct port *port) 1183 { 1184 /* check if tx timer expired, to verify that we do not send more than 1185 * 3 packets per second 1186 */ 1187 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1188 /* check if there is something to send */ 1189 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1190 __update_lacpdu_from_port(port); 1191 1192 if (ad_lacpdu_send(port) >= 0) { 1193 pr_debug("Sent LACPDU on port %d\n", 1194 port->actor_port_number); 1195 1196 /* mark ntt as false, so it will not be sent 1197 * again until demanded 1198 */ 1199 port->ntt = false; 1200 } 1201 } 1202 /* restart tx timer(to verify that we will not exceed 1203 * AD_MAX_TX_IN_SECOND 1204 */ 1205 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1206 } 1207 } 1208 1209 /** 1210 * ad_periodic_machine - handle a port's periodic state machine 1211 * @port: the port we're looking at 1212 * 1213 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1214 */ 1215 static void ad_periodic_machine(struct port *port) 1216 { 1217 periodic_states_t last_state; 1218 1219 /* keep current state machine state to compare later if it was changed */ 1220 last_state = port->sm_periodic_state; 1221 1222 /* check if port was reinitialized */ 1223 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1224 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1225 ) { 1226 port->sm_periodic_state = AD_NO_PERIODIC; 1227 } 1228 /* check if state machine should change state */ 1229 else if (port->sm_periodic_timer_counter) { 1230 /* check if periodic state machine expired */ 1231 if (!(--port->sm_periodic_timer_counter)) { 1232 /* if expired then do tx */ 1233 port->sm_periodic_state = AD_PERIODIC_TX; 1234 } else { 1235 /* If not expired, check if there is some new timeout 1236 * parameter from the partner state 1237 */ 1238 switch (port->sm_periodic_state) { 1239 case AD_FAST_PERIODIC: 1240 if (!(port->partner_oper.port_state 1241 & AD_STATE_LACP_TIMEOUT)) 1242 port->sm_periodic_state = AD_SLOW_PERIODIC; 1243 break; 1244 case AD_SLOW_PERIODIC: 1245 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1246 port->sm_periodic_timer_counter = 0; 1247 port->sm_periodic_state = AD_PERIODIC_TX; 1248 } 1249 break; 1250 default: 1251 break; 1252 } 1253 } 1254 } else { 1255 switch (port->sm_periodic_state) { 1256 case AD_NO_PERIODIC: 1257 port->sm_periodic_state = AD_FAST_PERIODIC; 1258 break; 1259 case AD_PERIODIC_TX: 1260 if (!(port->partner_oper.port_state & 1261 AD_STATE_LACP_TIMEOUT)) 1262 port->sm_periodic_state = AD_SLOW_PERIODIC; 1263 else 1264 port->sm_periodic_state = AD_FAST_PERIODIC; 1265 break; 1266 default: 1267 break; 1268 } 1269 } 1270 1271 /* check if the state machine was changed */ 1272 if (port->sm_periodic_state != last_state) { 1273 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1274 port->actor_port_number, last_state, 1275 port->sm_periodic_state); 1276 switch (port->sm_periodic_state) { 1277 case AD_NO_PERIODIC: 1278 port->sm_periodic_timer_counter = 0; 1279 break; 1280 case AD_FAST_PERIODIC: 1281 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1282 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1283 break; 1284 case AD_SLOW_PERIODIC: 1285 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1286 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1287 break; 1288 case AD_PERIODIC_TX: 1289 port->ntt = true; 1290 break; 1291 default: 1292 break; 1293 } 1294 } 1295 } 1296 1297 /** 1298 * ad_port_selection_logic - select aggregation groups 1299 * @port: the port we're looking at 1300 * @update_slave_arr: Does slave array need update? 1301 * 1302 * Select aggregation groups, and assign each port for it's aggregetor. The 1303 * selection logic is called in the inititalization (after all the handshkes), 1304 * and after every lacpdu receive (if selected is off). 1305 */ 1306 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1307 { 1308 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1309 struct port *last_port = NULL, *curr_port; 1310 struct list_head *iter; 1311 struct bonding *bond; 1312 struct slave *slave; 1313 int found = 0; 1314 1315 /* if the port is already Selected, do nothing */ 1316 if (port->sm_vars & AD_PORT_SELECTED) 1317 return; 1318 1319 bond = __get_bond_by_port(port); 1320 1321 /* if the port is connected to other aggregator, detach it */ 1322 if (port->aggregator) { 1323 /* detach the port from its former aggregator */ 1324 temp_aggregator = port->aggregator; 1325 for (curr_port = temp_aggregator->lag_ports; curr_port; 1326 last_port = curr_port, 1327 curr_port = curr_port->next_port_in_aggregator) { 1328 if (curr_port == port) { 1329 temp_aggregator->num_of_ports--; 1330 /* if it is the first port attached to the 1331 * aggregator 1332 */ 1333 if (!last_port) { 1334 temp_aggregator->lag_ports = 1335 port->next_port_in_aggregator; 1336 } else { 1337 /* not the first port attached to the 1338 * aggregator 1339 */ 1340 last_port->next_port_in_aggregator = 1341 port->next_port_in_aggregator; 1342 } 1343 1344 /* clear the port's relations to this 1345 * aggregator 1346 */ 1347 port->aggregator = NULL; 1348 port->next_port_in_aggregator = NULL; 1349 port->actor_port_aggregator_identifier = 0; 1350 1351 netdev_dbg(bond->dev, "Port %d left LAG %d\n", 1352 port->actor_port_number, 1353 temp_aggregator->aggregator_identifier); 1354 /* if the aggregator is empty, clear its 1355 * parameters, and set it ready to be attached 1356 */ 1357 if (!temp_aggregator->lag_ports) 1358 ad_clear_agg(temp_aggregator); 1359 break; 1360 } 1361 } 1362 if (!curr_port) { 1363 /* meaning: the port was related to an aggregator 1364 * but was not on the aggregator port list 1365 */ 1366 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1367 port->slave->bond->dev->name, 1368 port->actor_port_number, 1369 port->slave->dev->name, 1370 port->aggregator->aggregator_identifier); 1371 } 1372 } 1373 /* search on all aggregators for a suitable aggregator for this port */ 1374 bond_for_each_slave(bond, slave, iter) { 1375 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1376 1377 /* keep a free aggregator for later use(if needed) */ 1378 if (!aggregator->lag_ports) { 1379 if (!free_aggregator) 1380 free_aggregator = aggregator; 1381 continue; 1382 } 1383 /* check if current aggregator suits us */ 1384 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1385 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1386 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1387 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1388 ) && 1389 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1390 !aggregator->is_individual) /* but is not individual OR */ 1391 ) 1392 ) { 1393 /* attach to the founded aggregator */ 1394 port->aggregator = aggregator; 1395 port->actor_port_aggregator_identifier = 1396 port->aggregator->aggregator_identifier; 1397 port->next_port_in_aggregator = aggregator->lag_ports; 1398 port->aggregator->num_of_ports++; 1399 aggregator->lag_ports = port; 1400 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", 1401 port->actor_port_number, 1402 port->aggregator->aggregator_identifier); 1403 1404 /* mark this port as selected */ 1405 port->sm_vars |= AD_PORT_SELECTED; 1406 found = 1; 1407 break; 1408 } 1409 } 1410 1411 /* the port couldn't find an aggregator - attach it to a new 1412 * aggregator 1413 */ 1414 if (!found) { 1415 if (free_aggregator) { 1416 /* assign port a new aggregator */ 1417 port->aggregator = free_aggregator; 1418 port->actor_port_aggregator_identifier = 1419 port->aggregator->aggregator_identifier; 1420 1421 /* update the new aggregator's parameters 1422 * if port was responsed from the end-user 1423 */ 1424 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1425 /* if port is full duplex */ 1426 port->aggregator->is_individual = false; 1427 else 1428 port->aggregator->is_individual = true; 1429 1430 port->aggregator->actor_admin_aggregator_key = 1431 port->actor_admin_port_key; 1432 port->aggregator->actor_oper_aggregator_key = 1433 port->actor_oper_port_key; 1434 port->aggregator->partner_system = 1435 port->partner_oper.system; 1436 port->aggregator->partner_system_priority = 1437 port->partner_oper.system_priority; 1438 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1439 port->aggregator->receive_state = 1; 1440 port->aggregator->transmit_state = 1; 1441 port->aggregator->lag_ports = port; 1442 port->aggregator->num_of_ports++; 1443 1444 /* mark this port as selected */ 1445 port->sm_vars |= AD_PORT_SELECTED; 1446 1447 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", 1448 port->actor_port_number, 1449 port->aggregator->aggregator_identifier); 1450 } else { 1451 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", 1452 port->actor_port_number, port->slave->dev->name); 1453 } 1454 } 1455 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1456 * in all aggregator's ports, else set ready=FALSE in all 1457 * aggregator's ports 1458 */ 1459 __set_agg_ports_ready(port->aggregator, 1460 __agg_ports_are_ready(port->aggregator)); 1461 1462 aggregator = __get_first_agg(port); 1463 ad_agg_selection_logic(aggregator, update_slave_arr); 1464 1465 if (!port->aggregator->is_active) 1466 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1467 } 1468 1469 /* Decide if "agg" is a better choice for the new active aggregator that 1470 * the current best, according to the ad_select policy. 1471 */ 1472 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1473 struct aggregator *curr) 1474 { 1475 /* 0. If no best, select current. 1476 * 1477 * 1. If the current agg is not individual, and the best is 1478 * individual, select current. 1479 * 1480 * 2. If current agg is individual and the best is not, keep best. 1481 * 1482 * 3. Therefore, current and best are both individual or both not 1483 * individual, so: 1484 * 1485 * 3a. If current agg partner replied, and best agg partner did not, 1486 * select current. 1487 * 1488 * 3b. If current agg partner did not reply and best agg partner 1489 * did reply, keep best. 1490 * 1491 * 4. Therefore, current and best both have partner replies or 1492 * both do not, so perform selection policy: 1493 * 1494 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1495 * select by bandwidth. 1496 * 1497 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1498 */ 1499 if (!best) 1500 return curr; 1501 1502 if (!curr->is_individual && best->is_individual) 1503 return curr; 1504 1505 if (curr->is_individual && !best->is_individual) 1506 return best; 1507 1508 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1509 return curr; 1510 1511 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1512 return best; 1513 1514 switch (__get_agg_selection_mode(curr->lag_ports)) { 1515 case BOND_AD_COUNT: 1516 if (curr->num_of_ports > best->num_of_ports) 1517 return curr; 1518 1519 if (curr->num_of_ports < best->num_of_ports) 1520 return best; 1521 1522 /*FALLTHROUGH*/ 1523 case BOND_AD_STABLE: 1524 case BOND_AD_BANDWIDTH: 1525 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1526 return curr; 1527 1528 break; 1529 1530 default: 1531 net_warn_ratelimited("%s: Impossible agg select mode %d\n", 1532 curr->slave->bond->dev->name, 1533 __get_agg_selection_mode(curr->lag_ports)); 1534 break; 1535 } 1536 1537 return best; 1538 } 1539 1540 static int agg_device_up(const struct aggregator *agg) 1541 { 1542 struct port *port = agg->lag_ports; 1543 1544 if (!port) 1545 return 0; 1546 1547 return netif_running(port->slave->dev) && 1548 netif_carrier_ok(port->slave->dev); 1549 } 1550 1551 /** 1552 * ad_agg_selection_logic - select an aggregation group for a team 1553 * @aggregator: the aggregator we're looking at 1554 * @update_slave_arr: Does slave array need update? 1555 * 1556 * It is assumed that only one aggregator may be selected for a team. 1557 * 1558 * The logic of this function is to select the aggregator according to 1559 * the ad_select policy: 1560 * 1561 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1562 * it, and to reselect the active aggregator only if the previous 1563 * aggregator has no more ports related to it. 1564 * 1565 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1566 * bandwidth, and reselect whenever a link state change takes place or the 1567 * set of slaves in the bond changes. 1568 * 1569 * BOND_AD_COUNT: select the aggregator with largest number of ports 1570 * (slaves), and reselect whenever a link state change takes place or the 1571 * set of slaves in the bond changes. 1572 * 1573 * FIXME: this function MUST be called with the first agg in the bond, or 1574 * __get_active_agg() won't work correctly. This function should be better 1575 * called with the bond itself, and retrieve the first agg from it. 1576 */ 1577 static void ad_agg_selection_logic(struct aggregator *agg, 1578 bool *update_slave_arr) 1579 { 1580 struct aggregator *best, *active, *origin; 1581 struct bonding *bond = agg->slave->bond; 1582 struct list_head *iter; 1583 struct slave *slave; 1584 struct port *port; 1585 1586 rcu_read_lock(); 1587 origin = agg; 1588 active = __get_active_agg(agg); 1589 best = (active && agg_device_up(active)) ? active : NULL; 1590 1591 bond_for_each_slave_rcu(bond, slave, iter) { 1592 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1593 1594 agg->is_active = 0; 1595 1596 if (agg->num_of_ports && agg_device_up(agg)) 1597 best = ad_agg_selection_test(best, agg); 1598 } 1599 1600 if (best && 1601 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1602 /* For the STABLE policy, don't replace the old active 1603 * aggregator if it's still active (it has an answering 1604 * partner) or if both the best and active don't have an 1605 * answering partner. 1606 */ 1607 if (active && active->lag_ports && 1608 active->lag_ports->is_enabled && 1609 (__agg_has_partner(active) || 1610 (!__agg_has_partner(active) && 1611 !__agg_has_partner(best)))) { 1612 if (!(!active->actor_oper_aggregator_key && 1613 best->actor_oper_aggregator_key)) { 1614 best = NULL; 1615 active->is_active = 1; 1616 } 1617 } 1618 } 1619 1620 if (best && (best == active)) { 1621 best = NULL; 1622 active->is_active = 1; 1623 } 1624 1625 /* if there is new best aggregator, activate it */ 1626 if (best) { 1627 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1628 best->aggregator_identifier, best->num_of_ports, 1629 best->actor_oper_aggregator_key, 1630 best->partner_oper_aggregator_key, 1631 best->is_individual, best->is_active); 1632 netdev_dbg(bond->dev, "best ports %p slave %p %s\n", 1633 best->lag_ports, best->slave, 1634 best->slave ? best->slave->dev->name : "NULL"); 1635 1636 bond_for_each_slave_rcu(bond, slave, iter) { 1637 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1638 1639 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1640 agg->aggregator_identifier, agg->num_of_ports, 1641 agg->actor_oper_aggregator_key, 1642 agg->partner_oper_aggregator_key, 1643 agg->is_individual, agg->is_active); 1644 } 1645 1646 /* check if any partner replys */ 1647 if (best->is_individual) { 1648 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1649 best->slave ? 1650 best->slave->bond->dev->name : "NULL"); 1651 } 1652 1653 best->is_active = 1; 1654 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", 1655 best->aggregator_identifier); 1656 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1657 best->aggregator_identifier, best->num_of_ports, 1658 best->actor_oper_aggregator_key, 1659 best->partner_oper_aggregator_key, 1660 best->is_individual, best->is_active); 1661 1662 /* disable the ports that were related to the former 1663 * active_aggregator 1664 */ 1665 if (active) { 1666 for (port = active->lag_ports; port; 1667 port = port->next_port_in_aggregator) { 1668 __disable_port(port); 1669 } 1670 } 1671 /* Slave array needs update. */ 1672 *update_slave_arr = true; 1673 } 1674 1675 /* if the selected aggregator is of join individuals 1676 * (partner_system is NULL), enable their ports 1677 */ 1678 active = __get_active_agg(origin); 1679 1680 if (active) { 1681 if (!__agg_has_partner(active)) { 1682 for (port = active->lag_ports; port; 1683 port = port->next_port_in_aggregator) { 1684 __enable_port(port); 1685 } 1686 } 1687 } 1688 1689 rcu_read_unlock(); 1690 1691 bond_3ad_set_carrier(bond); 1692 } 1693 1694 /** 1695 * ad_clear_agg - clear a given aggregator's parameters 1696 * @aggregator: the aggregator we're looking at 1697 */ 1698 static void ad_clear_agg(struct aggregator *aggregator) 1699 { 1700 if (aggregator) { 1701 aggregator->is_individual = false; 1702 aggregator->actor_admin_aggregator_key = 0; 1703 aggregator->actor_oper_aggregator_key = 0; 1704 aggregator->partner_system = null_mac_addr; 1705 aggregator->partner_system_priority = 0; 1706 aggregator->partner_oper_aggregator_key = 0; 1707 aggregator->receive_state = 0; 1708 aggregator->transmit_state = 0; 1709 aggregator->lag_ports = NULL; 1710 aggregator->is_active = 0; 1711 aggregator->num_of_ports = 0; 1712 pr_debug("LAG %d was cleared\n", 1713 aggregator->aggregator_identifier); 1714 } 1715 } 1716 1717 /** 1718 * ad_initialize_agg - initialize a given aggregator's parameters 1719 * @aggregator: the aggregator we're looking at 1720 */ 1721 static void ad_initialize_agg(struct aggregator *aggregator) 1722 { 1723 if (aggregator) { 1724 ad_clear_agg(aggregator); 1725 1726 aggregator->aggregator_mac_address = null_mac_addr; 1727 aggregator->aggregator_identifier = 0; 1728 aggregator->slave = NULL; 1729 } 1730 } 1731 1732 /** 1733 * ad_initialize_port - initialize a given port's parameters 1734 * @aggregator: the aggregator we're looking at 1735 * @lacp_fast: boolean. whether fast periodic should be used 1736 */ 1737 static void ad_initialize_port(struct port *port, int lacp_fast) 1738 { 1739 static const struct port_params tmpl = { 1740 .system_priority = 0xffff, 1741 .key = 1, 1742 .port_number = 1, 1743 .port_priority = 0xff, 1744 .port_state = 1, 1745 }; 1746 static const struct lacpdu lacpdu = { 1747 .subtype = 0x01, 1748 .version_number = 0x01, 1749 .tlv_type_actor_info = 0x01, 1750 .actor_information_length = 0x14, 1751 .tlv_type_partner_info = 0x02, 1752 .partner_information_length = 0x14, 1753 .tlv_type_collector_info = 0x03, 1754 .collector_information_length = 0x10, 1755 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1756 }; 1757 1758 if (port) { 1759 port->actor_port_priority = 0xff; 1760 port->actor_port_aggregator_identifier = 0; 1761 port->ntt = false; 1762 port->actor_admin_port_state = AD_STATE_AGGREGATION | 1763 AD_STATE_LACP_ACTIVITY; 1764 port->actor_oper_port_state = AD_STATE_AGGREGATION | 1765 AD_STATE_LACP_ACTIVITY; 1766 1767 if (lacp_fast) 1768 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1769 1770 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1771 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1772 1773 port->is_enabled = true; 1774 /* private parameters */ 1775 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1776 port->sm_rx_state = 0; 1777 port->sm_rx_timer_counter = 0; 1778 port->sm_periodic_state = 0; 1779 port->sm_periodic_timer_counter = 0; 1780 port->sm_mux_state = 0; 1781 port->sm_mux_timer_counter = 0; 1782 port->sm_tx_state = 0; 1783 port->aggregator = NULL; 1784 port->next_port_in_aggregator = NULL; 1785 port->transaction_id = 0; 1786 1787 port->sm_churn_actor_timer_counter = 0; 1788 port->sm_churn_actor_state = 0; 1789 port->churn_actor_count = 0; 1790 port->sm_churn_partner_timer_counter = 0; 1791 port->sm_churn_partner_state = 0; 1792 port->churn_partner_count = 0; 1793 1794 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1795 } 1796 } 1797 1798 /** 1799 * ad_enable_collecting_distributing - enable a port's transmit/receive 1800 * @port: the port we're looking at 1801 * @update_slave_arr: Does slave array need update? 1802 * 1803 * Enable @port if it's in an active aggregator 1804 */ 1805 static void ad_enable_collecting_distributing(struct port *port, 1806 bool *update_slave_arr) 1807 { 1808 if (port->aggregator->is_active) { 1809 pr_debug("Enabling port %d(LAG %d)\n", 1810 port->actor_port_number, 1811 port->aggregator->aggregator_identifier); 1812 __enable_port(port); 1813 /* Slave array needs update */ 1814 *update_slave_arr = true; 1815 } 1816 } 1817 1818 /** 1819 * ad_disable_collecting_distributing - disable a port's transmit/receive 1820 * @port: the port we're looking at 1821 * @update_slave_arr: Does slave array need update? 1822 */ 1823 static void ad_disable_collecting_distributing(struct port *port, 1824 bool *update_slave_arr) 1825 { 1826 if (port->aggregator && 1827 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1828 &(null_mac_addr))) { 1829 pr_debug("Disabling port %d(LAG %d)\n", 1830 port->actor_port_number, 1831 port->aggregator->aggregator_identifier); 1832 __disable_port(port); 1833 /* Slave array needs an update */ 1834 *update_slave_arr = true; 1835 } 1836 } 1837 1838 /** 1839 * ad_marker_info_received - handle receive of a Marker information frame 1840 * @marker_info: Marker info received 1841 * @port: the port we're looking at 1842 */ 1843 static void ad_marker_info_received(struct bond_marker *marker_info, 1844 struct port *port) 1845 { 1846 struct bond_marker marker; 1847 1848 /* copy the received marker data to the response marker */ 1849 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1850 /* change the marker subtype to marker response */ 1851 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1852 1853 /* send the marker response */ 1854 if (ad_marker_send(port, &marker) >= 0) { 1855 pr_debug("Sent Marker Response on port %d\n", 1856 port->actor_port_number); 1857 } 1858 } 1859 1860 /** 1861 * ad_marker_response_received - handle receive of a marker response frame 1862 * @marker: marker PDU received 1863 * @port: the port we're looking at 1864 * 1865 * This function does nothing since we decided not to implement send and handle 1866 * response for marker PDU's, in this stage, but only to respond to marker 1867 * information. 1868 */ 1869 static void ad_marker_response_received(struct bond_marker *marker, 1870 struct port *port) 1871 { 1872 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1873 } 1874 1875 /* ========= AD exported functions to the main bonding code ========= */ 1876 1877 /* Check aggregators status in team every T seconds */ 1878 #define AD_AGGREGATOR_SELECTION_TIMER 8 1879 1880 /** 1881 * bond_3ad_initiate_agg_selection - initate aggregator selection 1882 * @bond: bonding struct 1883 * 1884 * Set the aggregation selection timer, to initiate an agg selection in 1885 * the very near future. Called during first initialization, and during 1886 * any down to up transitions of the bond. 1887 */ 1888 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1889 { 1890 BOND_AD_INFO(bond).agg_select_timer = timeout; 1891 } 1892 1893 /** 1894 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1895 * @bond: bonding struct to work on 1896 * @tick_resolution: tick duration (millisecond resolution) 1897 * 1898 * Can be called only after the mac address of the bond is set. 1899 */ 1900 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1901 { 1902 /* check that the bond is not initialized yet */ 1903 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1904 bond->dev->dev_addr)) { 1905 1906 BOND_AD_INFO(bond).aggregator_identifier = 0; 1907 1908 BOND_AD_INFO(bond).system.sys_priority = 1909 bond->params.ad_actor_sys_prio; 1910 if (is_zero_ether_addr(bond->params.ad_actor_system)) 1911 BOND_AD_INFO(bond).system.sys_mac_addr = 1912 *((struct mac_addr *)bond->dev->dev_addr); 1913 else 1914 BOND_AD_INFO(bond).system.sys_mac_addr = 1915 *((struct mac_addr *)bond->params.ad_actor_system); 1916 1917 /* initialize how many times this module is called in one 1918 * second (should be about every 100ms) 1919 */ 1920 ad_ticks_per_sec = tick_resolution; 1921 1922 bond_3ad_initiate_agg_selection(bond, 1923 AD_AGGREGATOR_SELECTION_TIMER * 1924 ad_ticks_per_sec); 1925 } 1926 } 1927 1928 /** 1929 * bond_3ad_bind_slave - initialize a slave's port 1930 * @slave: slave struct to work on 1931 * 1932 * Returns: 0 on success 1933 * < 0 on error 1934 */ 1935 void bond_3ad_bind_slave(struct slave *slave) 1936 { 1937 struct bonding *bond = bond_get_bond_by_slave(slave); 1938 struct port *port; 1939 struct aggregator *aggregator; 1940 1941 /* check that the slave has not been initialized yet. */ 1942 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 1943 1944 /* port initialization */ 1945 port = &(SLAVE_AD_INFO(slave)->port); 1946 1947 ad_initialize_port(port, bond->params.lacp_fast); 1948 1949 port->slave = slave; 1950 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 1951 /* key is determined according to the link speed, duplex and 1952 * user key 1953 */ 1954 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 1955 ad_update_actor_keys(port, false); 1956 /* actor system is the bond's system */ 1957 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 1958 port->actor_system_priority = 1959 BOND_AD_INFO(bond).system.sys_priority; 1960 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 1961 * lacpdu's are sent in one second) 1962 */ 1963 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1964 1965 __disable_port(port); 1966 1967 /* aggregator initialization */ 1968 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1969 1970 ad_initialize_agg(aggregator); 1971 1972 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 1973 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 1974 aggregator->slave = slave; 1975 aggregator->is_active = 0; 1976 aggregator->num_of_ports = 0; 1977 } 1978 } 1979 1980 /** 1981 * bond_3ad_unbind_slave - deinitialize a slave's port 1982 * @slave: slave struct to work on 1983 * 1984 * Search for the aggregator that is related to this port, remove the 1985 * aggregator and assign another aggregator for other port related to it 1986 * (if any), and remove the port. 1987 */ 1988 void bond_3ad_unbind_slave(struct slave *slave) 1989 { 1990 struct port *port, *prev_port, *temp_port; 1991 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 1992 int select_new_active_agg = 0; 1993 struct bonding *bond = slave->bond; 1994 struct slave *slave_iter; 1995 struct list_head *iter; 1996 bool dummy_slave_update; /* Ignore this value as caller updates array */ 1997 1998 /* Sync against bond_3ad_state_machine_handler() */ 1999 spin_lock_bh(&bond->mode_lock); 2000 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2001 port = &(SLAVE_AD_INFO(slave)->port); 2002 2003 /* if slave is null, the whole port is not initialized */ 2004 if (!port->slave) { 2005 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", 2006 slave->dev->name); 2007 goto out; 2008 } 2009 2010 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", 2011 aggregator->aggregator_identifier); 2012 2013 /* Tell the partner that this port is not suitable for aggregation */ 2014 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 2015 __update_lacpdu_from_port(port); 2016 ad_lacpdu_send(port); 2017 2018 /* check if this aggregator is occupied */ 2019 if (aggregator->lag_ports) { 2020 /* check if there are other ports related to this aggregator 2021 * except the port related to this slave(thats ensure us that 2022 * there is a reason to search for new aggregator, and that we 2023 * will find one 2024 */ 2025 if ((aggregator->lag_ports != port) || 2026 (aggregator->lag_ports->next_port_in_aggregator)) { 2027 /* find new aggregator for the related port(s) */ 2028 bond_for_each_slave(bond, slave_iter, iter) { 2029 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2030 /* if the new aggregator is empty, or it is 2031 * connected to our port only 2032 */ 2033 if (!new_aggregator->lag_ports || 2034 ((new_aggregator->lag_ports == port) && 2035 !new_aggregator->lag_ports->next_port_in_aggregator)) 2036 break; 2037 } 2038 if (!slave_iter) 2039 new_aggregator = NULL; 2040 2041 /* if new aggregator found, copy the aggregator's 2042 * parameters and connect the related lag_ports to the 2043 * new aggregator 2044 */ 2045 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2046 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2047 aggregator->aggregator_identifier, 2048 new_aggregator->aggregator_identifier); 2049 2050 if ((new_aggregator->lag_ports == port) && 2051 new_aggregator->is_active) { 2052 netdev_info(bond->dev, "Removing an active aggregator\n"); 2053 select_new_active_agg = 1; 2054 } 2055 2056 new_aggregator->is_individual = aggregator->is_individual; 2057 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2058 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2059 new_aggregator->partner_system = aggregator->partner_system; 2060 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2061 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2062 new_aggregator->receive_state = aggregator->receive_state; 2063 new_aggregator->transmit_state = aggregator->transmit_state; 2064 new_aggregator->lag_ports = aggregator->lag_ports; 2065 new_aggregator->is_active = aggregator->is_active; 2066 new_aggregator->num_of_ports = aggregator->num_of_ports; 2067 2068 /* update the information that is written on 2069 * the ports about the aggregator 2070 */ 2071 for (temp_port = aggregator->lag_ports; temp_port; 2072 temp_port = temp_port->next_port_in_aggregator) { 2073 temp_port->aggregator = new_aggregator; 2074 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2075 } 2076 2077 ad_clear_agg(aggregator); 2078 2079 if (select_new_active_agg) 2080 ad_agg_selection_logic(__get_first_agg(port), 2081 &dummy_slave_update); 2082 } else { 2083 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2084 } 2085 } else { 2086 /* in case that the only port related to this 2087 * aggregator is the one we want to remove 2088 */ 2089 select_new_active_agg = aggregator->is_active; 2090 ad_clear_agg(aggregator); 2091 if (select_new_active_agg) { 2092 netdev_info(bond->dev, "Removing an active aggregator\n"); 2093 /* select new active aggregator */ 2094 temp_aggregator = __get_first_agg(port); 2095 if (temp_aggregator) 2096 ad_agg_selection_logic(temp_aggregator, 2097 &dummy_slave_update); 2098 } 2099 } 2100 } 2101 2102 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); 2103 2104 /* find the aggregator that this port is connected to */ 2105 bond_for_each_slave(bond, slave_iter, iter) { 2106 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2107 prev_port = NULL; 2108 /* search the port in the aggregator's related ports */ 2109 for (temp_port = temp_aggregator->lag_ports; temp_port; 2110 prev_port = temp_port, 2111 temp_port = temp_port->next_port_in_aggregator) { 2112 if (temp_port == port) { 2113 /* the aggregator found - detach the port from 2114 * this aggregator 2115 */ 2116 if (prev_port) 2117 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2118 else 2119 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2120 temp_aggregator->num_of_ports--; 2121 if (temp_aggregator->num_of_ports == 0) { 2122 select_new_active_agg = temp_aggregator->is_active; 2123 ad_clear_agg(temp_aggregator); 2124 if (select_new_active_agg) { 2125 netdev_info(bond->dev, "Removing an active aggregator\n"); 2126 /* select new active aggregator */ 2127 ad_agg_selection_logic(__get_first_agg(port), 2128 &dummy_slave_update); 2129 } 2130 } 2131 break; 2132 } 2133 } 2134 } 2135 port->slave = NULL; 2136 2137 out: 2138 spin_unlock_bh(&bond->mode_lock); 2139 } 2140 2141 /** 2142 * bond_3ad_state_machine_handler - handle state machines timeout 2143 * @bond: bonding struct to work on 2144 * 2145 * The state machine handling concept in this module is to check every tick 2146 * which state machine should operate any function. The execution order is 2147 * round robin, so when we have an interaction between state machines, the 2148 * reply of one to each other might be delayed until next tick. 2149 * 2150 * This function also complete the initialization when the agg_select_timer 2151 * times out, and it selects an aggregator for the ports that are yet not 2152 * related to any aggregator, and selects the active aggregator for a bond. 2153 */ 2154 void bond_3ad_state_machine_handler(struct work_struct *work) 2155 { 2156 struct bonding *bond = container_of(work, struct bonding, 2157 ad_work.work); 2158 struct aggregator *aggregator; 2159 struct list_head *iter; 2160 struct slave *slave; 2161 struct port *port; 2162 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2163 bool update_slave_arr = false; 2164 2165 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2166 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2167 * concurrently due to incoming LACPDU as well. 2168 */ 2169 spin_lock_bh(&bond->mode_lock); 2170 rcu_read_lock(); 2171 2172 /* check if there are any slaves */ 2173 if (!bond_has_slaves(bond)) 2174 goto re_arm; 2175 2176 /* check if agg_select_timer timer after initialize is timed out */ 2177 if (BOND_AD_INFO(bond).agg_select_timer && 2178 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2179 slave = bond_first_slave_rcu(bond); 2180 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2181 2182 /* select the active aggregator for the bond */ 2183 if (port) { 2184 if (!port->slave) { 2185 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2186 bond->dev->name); 2187 goto re_arm; 2188 } 2189 2190 aggregator = __get_first_agg(port); 2191 ad_agg_selection_logic(aggregator, &update_slave_arr); 2192 } 2193 bond_3ad_set_carrier(bond); 2194 } 2195 2196 /* for each port run the state machines */ 2197 bond_for_each_slave_rcu(bond, slave, iter) { 2198 port = &(SLAVE_AD_INFO(slave)->port); 2199 if (!port->slave) { 2200 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2201 bond->dev->name); 2202 goto re_arm; 2203 } 2204 2205 ad_rx_machine(NULL, port); 2206 ad_periodic_machine(port); 2207 ad_port_selection_logic(port, &update_slave_arr); 2208 ad_mux_machine(port, &update_slave_arr); 2209 ad_tx_machine(port); 2210 ad_churn_machine(port); 2211 2212 /* turn off the BEGIN bit, since we already handled it */ 2213 if (port->sm_vars & AD_PORT_BEGIN) 2214 port->sm_vars &= ~AD_PORT_BEGIN; 2215 } 2216 2217 re_arm: 2218 bond_for_each_slave_rcu(bond, slave, iter) { 2219 if (slave->should_notify) { 2220 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2221 break; 2222 } 2223 } 2224 rcu_read_unlock(); 2225 spin_unlock_bh(&bond->mode_lock); 2226 2227 if (update_slave_arr) 2228 bond_slave_arr_work_rearm(bond, 0); 2229 2230 if (should_notify_rtnl && rtnl_trylock()) { 2231 bond_slave_state_notify(bond); 2232 rtnl_unlock(); 2233 } 2234 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2235 } 2236 2237 /** 2238 * bond_3ad_rx_indication - handle a received frame 2239 * @lacpdu: received lacpdu 2240 * @slave: slave struct to work on 2241 * @length: length of the data received 2242 * 2243 * It is assumed that frames that were sent on this NIC don't returned as new 2244 * received frames (loopback). Since only the payload is given to this 2245 * function, it check for loopback. 2246 */ 2247 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, 2248 u16 length) 2249 { 2250 struct port *port; 2251 int ret = RX_HANDLER_ANOTHER; 2252 2253 if (length >= sizeof(struct lacpdu)) { 2254 2255 port = &(SLAVE_AD_INFO(slave)->port); 2256 2257 if (!port->slave) { 2258 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2259 slave->dev->name, slave->bond->dev->name); 2260 return ret; 2261 } 2262 2263 switch (lacpdu->subtype) { 2264 case AD_TYPE_LACPDU: 2265 ret = RX_HANDLER_CONSUMED; 2266 netdev_dbg(slave->bond->dev, 2267 "Received LACPDU on port %d slave %s\n", 2268 port->actor_port_number, 2269 slave->dev->name); 2270 /* Protect against concurrent state machines */ 2271 spin_lock(&slave->bond->mode_lock); 2272 ad_rx_machine(lacpdu, port); 2273 spin_unlock(&slave->bond->mode_lock); 2274 break; 2275 2276 case AD_TYPE_MARKER: 2277 ret = RX_HANDLER_CONSUMED; 2278 /* No need to convert fields to Little Endian since we 2279 * don't use the marker's fields. 2280 */ 2281 2282 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2283 case AD_MARKER_INFORMATION_SUBTYPE: 2284 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", 2285 port->actor_port_number); 2286 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2287 break; 2288 2289 case AD_MARKER_RESPONSE_SUBTYPE: 2290 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", 2291 port->actor_port_number); 2292 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2293 break; 2294 2295 default: 2296 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", 2297 port->actor_port_number); 2298 } 2299 } 2300 } 2301 return ret; 2302 } 2303 2304 /** 2305 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2306 * its current speed and duplex settings. 2307 * 2308 * @port: the port we'are looking at 2309 * @reset: Boolean to just reset the speed and the duplex part of the key 2310 * 2311 * The logic to change the oper / admin keys is: 2312 * (a) A full duplex port can participate in LACP with partner. 2313 * (b) When the speed is changed, LACP need to be reinitiated. 2314 */ 2315 static void ad_update_actor_keys(struct port *port, bool reset) 2316 { 2317 u8 duplex = 0; 2318 u16 ospeed = 0, speed = 0; 2319 u16 old_oper_key = port->actor_oper_port_key; 2320 2321 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2322 if (!reset) { 2323 speed = __get_link_speed(port); 2324 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2325 duplex = __get_duplex(port); 2326 port->actor_admin_port_key |= (speed << 1) | duplex; 2327 } 2328 port->actor_oper_port_key = port->actor_admin_port_key; 2329 2330 if (old_oper_key != port->actor_oper_port_key) { 2331 /* Only 'duplex' port participates in LACP */ 2332 if (duplex) 2333 port->sm_vars |= AD_PORT_LACP_ENABLED; 2334 else 2335 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2336 2337 if (!reset) { 2338 if (!speed) { 2339 netdev_err(port->slave->dev, 2340 "speed changed to 0 for port %s", 2341 port->slave->dev->name); 2342 } else if (duplex && ospeed != speed) { 2343 /* Speed change restarts LACP state-machine */ 2344 port->sm_vars |= AD_PORT_BEGIN; 2345 } 2346 } 2347 } 2348 } 2349 2350 /** 2351 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2352 * change indication 2353 * 2354 * @slave: slave struct to work on 2355 * 2356 * Handle reselection of aggregator (if needed) for this port. 2357 */ 2358 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2359 { 2360 struct port *port; 2361 2362 port = &(SLAVE_AD_INFO(slave)->port); 2363 2364 /* if slave is null, the whole port is not initialized */ 2365 if (!port->slave) { 2366 netdev_warn(slave->bond->dev, 2367 "speed/duplex changed for uninitialized port %s\n", 2368 slave->dev->name); 2369 return; 2370 } 2371 2372 spin_lock_bh(&slave->bond->mode_lock); 2373 ad_update_actor_keys(port, false); 2374 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n", 2375 port->actor_port_number, slave->dev->name); 2376 spin_unlock_bh(&slave->bond->mode_lock); 2377 } 2378 2379 /** 2380 * bond_3ad_handle_link_change - handle a slave's link status change indication 2381 * @slave: slave struct to work on 2382 * @status: whether the link is now up or down 2383 * 2384 * Handle reselection of aggregator (if needed) for this port. 2385 */ 2386 void bond_3ad_handle_link_change(struct slave *slave, char link) 2387 { 2388 struct port *port; 2389 2390 port = &(SLAVE_AD_INFO(slave)->port); 2391 2392 /* if slave is null, the whole port is not initialized */ 2393 if (!port->slave) { 2394 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", 2395 slave->dev->name); 2396 return; 2397 } 2398 2399 spin_lock_bh(&slave->bond->mode_lock); 2400 /* on link down we are zeroing duplex and speed since 2401 * some of the adaptors(ce1000.lan) report full duplex/speed 2402 * instead of N/A(duplex) / 0(speed). 2403 * 2404 * on link up we are forcing recheck on the duplex and speed since 2405 * some of he adaptors(ce1000.lan) report. 2406 */ 2407 if (link == BOND_LINK_UP) { 2408 port->is_enabled = true; 2409 ad_update_actor_keys(port, false); 2410 } else { 2411 /* link has failed */ 2412 port->is_enabled = false; 2413 ad_update_actor_keys(port, true); 2414 } 2415 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", 2416 port->actor_port_number, 2417 link == BOND_LINK_UP ? "UP" : "DOWN"); 2418 2419 spin_unlock_bh(&slave->bond->mode_lock); 2420 2421 /* RTNL is held and mode_lock is released so it's safe 2422 * to update slave_array here. 2423 */ 2424 bond_update_slave_arr(slave->bond, NULL); 2425 } 2426 2427 /** 2428 * bond_3ad_set_carrier - set link state for bonding master 2429 * @bond - bonding structure 2430 * 2431 * if we have an active aggregator, we're up, if not, we're down. 2432 * Presumes that we cannot have an active aggregator if there are 2433 * no slaves with link up. 2434 * 2435 * This behavior complies with IEEE 802.3 section 43.3.9. 2436 * 2437 * Called by bond_set_carrier(). Return zero if carrier state does not 2438 * change, nonzero if it does. 2439 */ 2440 int bond_3ad_set_carrier(struct bonding *bond) 2441 { 2442 struct aggregator *active; 2443 struct slave *first_slave; 2444 int ret = 1; 2445 2446 rcu_read_lock(); 2447 first_slave = bond_first_slave_rcu(bond); 2448 if (!first_slave) { 2449 ret = 0; 2450 goto out; 2451 } 2452 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2453 if (active) { 2454 /* are enough slaves available to consider link up? */ 2455 if (active->num_of_ports < bond->params.min_links) { 2456 if (netif_carrier_ok(bond->dev)) { 2457 netif_carrier_off(bond->dev); 2458 goto out; 2459 } 2460 } else if (!netif_carrier_ok(bond->dev)) { 2461 netif_carrier_on(bond->dev); 2462 goto out; 2463 } 2464 } else if (netif_carrier_ok(bond->dev)) { 2465 netif_carrier_off(bond->dev); 2466 } 2467 out: 2468 rcu_read_unlock(); 2469 return ret; 2470 } 2471 2472 /** 2473 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2474 * @bond: bonding struct to work on 2475 * @ad_info: ad_info struct to fill with the bond's info 2476 * 2477 * Returns: 0 on success 2478 * < 0 on error 2479 */ 2480 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2481 struct ad_info *ad_info) 2482 { 2483 struct aggregator *aggregator = NULL; 2484 struct list_head *iter; 2485 struct slave *slave; 2486 struct port *port; 2487 2488 bond_for_each_slave_rcu(bond, slave, iter) { 2489 port = &(SLAVE_AD_INFO(slave)->port); 2490 if (port->aggregator && port->aggregator->is_active) { 2491 aggregator = port->aggregator; 2492 break; 2493 } 2494 } 2495 2496 if (!aggregator) 2497 return -1; 2498 2499 ad_info->aggregator_id = aggregator->aggregator_identifier; 2500 ad_info->ports = aggregator->num_of_ports; 2501 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2502 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2503 ether_addr_copy(ad_info->partner_system, 2504 aggregator->partner_system.mac_addr_value); 2505 return 0; 2506 } 2507 2508 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2509 { 2510 int ret; 2511 2512 rcu_read_lock(); 2513 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2514 rcu_read_unlock(); 2515 2516 return ret; 2517 } 2518 2519 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2520 struct slave *slave) 2521 { 2522 struct lacpdu *lacpdu, _lacpdu; 2523 2524 if (skb->protocol != PKT_TYPE_LACPDU) 2525 return RX_HANDLER_ANOTHER; 2526 2527 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2528 return RX_HANDLER_ANOTHER; 2529 2530 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2531 if (!lacpdu) 2532 return RX_HANDLER_ANOTHER; 2533 2534 return bond_3ad_rx_indication(lacpdu, slave, skb->len); 2535 } 2536 2537 /** 2538 * bond_3ad_update_lacp_rate - change the lacp rate 2539 * @bond - bonding struct 2540 * 2541 * When modify lacp_rate parameter via sysfs, 2542 * update actor_oper_port_state of each port. 2543 * 2544 * Hold bond->mode_lock, 2545 * so we can modify port->actor_oper_port_state, 2546 * no matter bond is up or down. 2547 */ 2548 void bond_3ad_update_lacp_rate(struct bonding *bond) 2549 { 2550 struct port *port = NULL; 2551 struct list_head *iter; 2552 struct slave *slave; 2553 int lacp_fast; 2554 2555 lacp_fast = bond->params.lacp_fast; 2556 spin_lock_bh(&bond->mode_lock); 2557 bond_for_each_slave(bond, slave, iter) { 2558 port = &(SLAVE_AD_INFO(slave)->port); 2559 if (lacp_fast) 2560 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2561 else 2562 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2563 } 2564 spin_unlock_bh(&bond->mode_lock); 2565 } 2566